The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the USB functions implementations into a separate directory.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
libcomposite-y := usbstring.o config.o epautoconf.o
libcomposite-y += composite.o functions.o configfs.o u_f.o
-# USB Functions
-usb_f_acm-y := f_acm.o
-obj-$(CONFIG_USB_F_ACM) += usb_f_acm.o
-usb_f_ss_lb-y := f_loopback.o f_sourcesink.o
-obj-$(CONFIG_USB_F_SS_LB) += usb_f_ss_lb.o
-obj-$(CONFIG_USB_U_SERIAL) += u_serial.o
-usb_f_serial-y := f_serial.o
-obj-$(CONFIG_USB_F_SERIAL) += usb_f_serial.o
-usb_f_obex-y := f_obex.o
-obj-$(CONFIG_USB_F_OBEX) += usb_f_obex.o
-obj-$(CONFIG_USB_U_ETHER) += u_ether.o
-usb_f_ncm-y := f_ncm.o
-obj-$(CONFIG_USB_F_NCM) += usb_f_ncm.o
-usb_f_ecm-y := f_ecm.o
-obj-$(CONFIG_USB_F_ECM) += usb_f_ecm.o
-usb_f_phonet-y := f_phonet.o
-obj-$(CONFIG_USB_F_PHONET) += usb_f_phonet.o
-usb_f_eem-y := f_eem.o
-obj-$(CONFIG_USB_F_EEM) += usb_f_eem.o
-usb_f_ecm_subset-y := f_subset.o
-obj-$(CONFIG_USB_F_SUBSET) += usb_f_ecm_subset.o
-usb_f_rndis-y := f_rndis.o rndis.o
-obj-$(CONFIG_USB_F_RNDIS) += usb_f_rndis.o
-usb_f_mass_storage-y := f_mass_storage.o storage_common.o
-obj-$(CONFIG_USB_F_MASS_STORAGE)+= usb_f_mass_storage.o
-usb_f_fs-y := f_fs.o
-obj-$(CONFIG_USB_F_FS) += usb_f_fs.o
-
-obj-$(CONFIG_USB_GADGET) += udc/ legacy/
+obj-$(CONFIG_USB_GADGET) += udc/ function/ legacy/
+++ /dev/null
-/*
- * f_acm.c -- USB CDC serial (ACM) function driver
- *
- * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
- * Copyright (C) 2008 by David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- * Copyright (C) 2009 by Samsung Electronics
- * Author: Michal Nazarewicz (mina86@mina86.com)
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/err.h>
-
-#include "u_serial.h"
-#include "gadget_chips.h"
-
-
-/*
- * This CDC ACM function support just wraps control functions and
- * notifications around the generic serial-over-usb code.
- *
- * Because CDC ACM is standardized by the USB-IF, many host operating
- * systems have drivers for it. Accordingly, ACM is the preferred
- * interop solution for serial-port type connections. The control
- * models are often not necessary, and in any case don't do much in
- * this bare-bones implementation.
- *
- * Note that even MS-Windows has some support for ACM. However, that
- * support is somewhat broken because when you use ACM in a composite
- * device, having multiple interfaces confuses the poor OS. It doesn't
- * seem to understand CDC Union descriptors. The new "association"
- * descriptors (roughly equivalent to CDC Unions) may sometimes help.
- */
-
-struct f_acm {
- struct gserial port;
- u8 ctrl_id, data_id;
- u8 port_num;
-
- u8 pending;
-
- /* lock is mostly for pending and notify_req ... they get accessed
- * by callbacks both from tty (open/close/break) under its spinlock,
- * and notify_req.complete() which can't use that lock.
- */
- spinlock_t lock;
-
- struct usb_ep *notify;
- struct usb_request *notify_req;
-
- struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
-
- /* SetControlLineState request -- CDC 1.1 section 6.2.14 (INPUT) */
- u16 port_handshake_bits;
-#define ACM_CTRL_RTS (1 << 1) /* unused with full duplex */
-#define ACM_CTRL_DTR (1 << 0) /* host is ready for data r/w */
-
- /* SerialState notification -- CDC 1.1 section 6.3.5 (OUTPUT) */
- u16 serial_state;
-#define ACM_CTRL_OVERRUN (1 << 6)
-#define ACM_CTRL_PARITY (1 << 5)
-#define ACM_CTRL_FRAMING (1 << 4)
-#define ACM_CTRL_RI (1 << 3)
-#define ACM_CTRL_BRK (1 << 2)
-#define ACM_CTRL_DSR (1 << 1)
-#define ACM_CTRL_DCD (1 << 0)
-};
-
-static inline struct f_acm *func_to_acm(struct usb_function *f)
-{
- return container_of(f, struct f_acm, port.func);
-}
-
-static inline struct f_acm *port_to_acm(struct gserial *p)
-{
- return container_of(p, struct f_acm, port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* notification endpoint uses smallish and infrequent fixed-size messages */
-
-#define GS_NOTIFY_INTERVAL_MS 32
-#define GS_NOTIFY_MAXPACKET 10 /* notification + 2 bytes */
-
-/* interface and class descriptors: */
-
-static struct usb_interface_assoc_descriptor
-acm_iad_descriptor = {
- .bLength = sizeof acm_iad_descriptor,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- /* .bFirstInterface = DYNAMIC, */
- .bInterfaceCount = 2, // control + data
- .bFunctionClass = USB_CLASS_COMM,
- .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
- .bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
- /* .iFunction = DYNAMIC */
-};
-
-
-static struct usb_interface_descriptor acm_control_interface_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
- .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_interface_descriptor acm_data_interface_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc acm_header_desc = {
- .bLength = sizeof(acm_header_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_call_mgmt_descriptor
-acm_call_mgmt_descriptor = {
- .bLength = sizeof(acm_call_mgmt_descriptor),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
- .bmCapabilities = 0,
- /* .bDataInterface = DYNAMIC */
-};
-
-static struct usb_cdc_acm_descriptor acm_descriptor = {
- .bLength = sizeof(acm_descriptor),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ACM_TYPE,
- .bmCapabilities = USB_CDC_CAP_LINE,
-};
-
-static struct usb_cdc_union_desc acm_union_desc = {
- .bLength = sizeof(acm_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- /* .bMasterInterface0 = DYNAMIC */
- /* .bSlaveInterface0 = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor acm_fs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
- .bInterval = GS_NOTIFY_INTERVAL_MS,
-};
-
-static struct usb_endpoint_descriptor acm_fs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor acm_fs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *acm_fs_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_fs_notify_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_fs_in_desc,
- (struct usb_descriptor_header *) &acm_fs_out_desc,
- NULL,
-};
-
-/* high speed support: */
-static struct usb_endpoint_descriptor acm_hs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
- .bInterval = USB_MS_TO_HS_INTERVAL(GS_NOTIFY_INTERVAL_MS),
-};
-
-static struct usb_endpoint_descriptor acm_hs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor acm_hs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *acm_hs_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_hs_notify_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_hs_in_desc,
- (struct usb_descriptor_header *) &acm_hs_out_desc,
- NULL,
-};
-
-static struct usb_endpoint_descriptor acm_ss_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor acm_ss_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor acm_ss_bulk_comp_desc = {
- .bLength = sizeof acm_ss_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-};
-
-static struct usb_descriptor_header *acm_ss_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_hs_notify_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_ss_in_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &acm_ss_out_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-#define ACM_CTRL_IDX 0
-#define ACM_DATA_IDX 1
-#define ACM_IAD_IDX 2
-
-/* static strings, in UTF-8 */
-static struct usb_string acm_string_defs[] = {
- [ACM_CTRL_IDX].s = "CDC Abstract Control Model (ACM)",
- [ACM_DATA_IDX].s = "CDC ACM Data",
- [ACM_IAD_IDX ].s = "CDC Serial",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings acm_string_table = {
- .language = 0x0409, /* en-us */
- .strings = acm_string_defs,
-};
-
-static struct usb_gadget_strings *acm_strings[] = {
- &acm_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-/* ACM control ... data handling is delegated to tty library code.
- * The main task of this function is to activate and deactivate
- * that code based on device state; track parameters like line
- * speed, handshake state, and so on; and issue notifications.
- */
-
-static void acm_complete_set_line_coding(struct usb_ep *ep,
- struct usb_request *req)
-{
- struct f_acm *acm = ep->driver_data;
- struct usb_composite_dev *cdev = acm->port.func.config->cdev;
-
- if (req->status != 0) {
- DBG(cdev, "acm ttyGS%d completion, err %d\n",
- acm->port_num, req->status);
- return;
- }
-
- /* normal completion */
- if (req->actual != sizeof(acm->port_line_coding)) {
- DBG(cdev, "acm ttyGS%d short resp, len %d\n",
- acm->port_num, req->actual);
- usb_ep_set_halt(ep);
- } else {
- struct usb_cdc_line_coding *value = req->buf;
-
- /* REVISIT: we currently just remember this data.
- * If we change that, (a) validate it first, then
- * (b) update whatever hardware needs updating,
- * (c) worry about locking. This is information on
- * the order of 9600-8-N-1 ... most of which means
- * nothing unless we control a real RS232 line.
- */
- acm->port_line_coding = *value;
- }
-}
-
-static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct f_acm *acm = func_to_acm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /* composite driver infrastructure handles everything except
- * CDC class messages; interface activation uses set_alt().
- *
- * Note CDC spec table 4 lists the ACM request profile. It requires
- * encapsulated command support ... we don't handle any, and respond
- * to them by stalling. Options include get/set/clear comm features
- * (not that useful) and SEND_BREAK.
- */
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
-
- /* SET_LINE_CODING ... just read and save what the host sends */
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_REQ_SET_LINE_CODING:
- if (w_length != sizeof(struct usb_cdc_line_coding)
- || w_index != acm->ctrl_id)
- goto invalid;
-
- value = w_length;
- cdev->gadget->ep0->driver_data = acm;
- req->complete = acm_complete_set_line_coding;
- break;
-
- /* GET_LINE_CODING ... return what host sent, or initial value */
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_REQ_GET_LINE_CODING:
- if (w_index != acm->ctrl_id)
- goto invalid;
-
- value = min_t(unsigned, w_length,
- sizeof(struct usb_cdc_line_coding));
- memcpy(req->buf, &acm->port_line_coding, value);
- break;
-
- /* SET_CONTROL_LINE_STATE ... save what the host sent */
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_REQ_SET_CONTROL_LINE_STATE:
- if (w_index != acm->ctrl_id)
- goto invalid;
-
- value = 0;
-
- /* FIXME we should not allow data to flow until the
- * host sets the ACM_CTRL_DTR bit; and when it clears
- * that bit, we should return to that no-flow state.
- */
- acm->port_handshake_bits = w_value;
- break;
-
- default:
-invalid:
- VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "acm ttyGS%d req%02x.%02x v%04x i%04x l%d\n",
- acm->port_num, ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = 0;
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "acm response on ttyGS%d, err %d\n",
- acm->port_num, value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_acm *acm = func_to_acm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* we know alt == 0, so this is an activation or a reset */
-
- if (intf == acm->ctrl_id) {
- if (acm->notify->driver_data) {
- VDBG(cdev, "reset acm control interface %d\n", intf);
- usb_ep_disable(acm->notify);
- } else {
- VDBG(cdev, "init acm ctrl interface %d\n", intf);
- if (config_ep_by_speed(cdev->gadget, f, acm->notify))
- return -EINVAL;
- }
- usb_ep_enable(acm->notify);
- acm->notify->driver_data = acm;
-
- } else if (intf == acm->data_id) {
- if (acm->port.in->driver_data) {
- DBG(cdev, "reset acm ttyGS%d\n", acm->port_num);
- gserial_disconnect(&acm->port);
- }
- if (!acm->port.in->desc || !acm->port.out->desc) {
- DBG(cdev, "activate acm ttyGS%d\n", acm->port_num);
- if (config_ep_by_speed(cdev->gadget, f,
- acm->port.in) ||
- config_ep_by_speed(cdev->gadget, f,
- acm->port.out)) {
- acm->port.in->desc = NULL;
- acm->port.out->desc = NULL;
- return -EINVAL;
- }
- }
- gserial_connect(&acm->port, acm->port_num);
-
- } else
- return -EINVAL;
-
- return 0;
-}
-
-static void acm_disable(struct usb_function *f)
-{
- struct f_acm *acm = func_to_acm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "acm ttyGS%d deactivated\n", acm->port_num);
- gserial_disconnect(&acm->port);
- usb_ep_disable(acm->notify);
- acm->notify->driver_data = NULL;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/**
- * acm_cdc_notify - issue CDC notification to host
- * @acm: wraps host to be notified
- * @type: notification type
- * @value: Refer to cdc specs, wValue field.
- * @data: data to be sent
- * @length: size of data
- * Context: irqs blocked, acm->lock held, acm_notify_req non-null
- *
- * Returns zero on success or a negative errno.
- *
- * See section 6.3.5 of the CDC 1.1 specification for information
- * about the only notification we issue: SerialState change.
- */
-static int acm_cdc_notify(struct f_acm *acm, u8 type, u16 value,
- void *data, unsigned length)
-{
- struct usb_ep *ep = acm->notify;
- struct usb_request *req;
- struct usb_cdc_notification *notify;
- const unsigned len = sizeof(*notify) + length;
- void *buf;
- int status;
-
- req = acm->notify_req;
- acm->notify_req = NULL;
- acm->pending = false;
-
- req->length = len;
- notify = req->buf;
- buf = notify + 1;
-
- notify->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS
- | USB_RECIP_INTERFACE;
- notify->bNotificationType = type;
- notify->wValue = cpu_to_le16(value);
- notify->wIndex = cpu_to_le16(acm->ctrl_id);
- notify->wLength = cpu_to_le16(length);
- memcpy(buf, data, length);
-
- /* ep_queue() can complete immediately if it fills the fifo... */
- spin_unlock(&acm->lock);
- status = usb_ep_queue(ep, req, GFP_ATOMIC);
- spin_lock(&acm->lock);
-
- if (status < 0) {
- ERROR(acm->port.func.config->cdev,
- "acm ttyGS%d can't notify serial state, %d\n",
- acm->port_num, status);
- acm->notify_req = req;
- }
-
- return status;
-}
-
-static int acm_notify_serial_state(struct f_acm *acm)
-{
- struct usb_composite_dev *cdev = acm->port.func.config->cdev;
- int status;
-
- spin_lock(&acm->lock);
- if (acm->notify_req) {
- DBG(cdev, "acm ttyGS%d serial state %04x\n",
- acm->port_num, acm->serial_state);
- status = acm_cdc_notify(acm, USB_CDC_NOTIFY_SERIAL_STATE,
- 0, &acm->serial_state, sizeof(acm->serial_state));
- } else {
- acm->pending = true;
- status = 0;
- }
- spin_unlock(&acm->lock);
- return status;
-}
-
-static void acm_cdc_notify_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_acm *acm = req->context;
- u8 doit = false;
-
- /* on this call path we do NOT hold the port spinlock,
- * which is why ACM needs its own spinlock
- */
- spin_lock(&acm->lock);
- if (req->status != -ESHUTDOWN)
- doit = acm->pending;
- acm->notify_req = req;
- spin_unlock(&acm->lock);
-
- if (doit)
- acm_notify_serial_state(acm);
-}
-
-/* connect == the TTY link is open */
-
-static void acm_connect(struct gserial *port)
-{
- struct f_acm *acm = port_to_acm(port);
-
- acm->serial_state |= ACM_CTRL_DSR | ACM_CTRL_DCD;
- acm_notify_serial_state(acm);
-}
-
-static void acm_disconnect(struct gserial *port)
-{
- struct f_acm *acm = port_to_acm(port);
-
- acm->serial_state &= ~(ACM_CTRL_DSR | ACM_CTRL_DCD);
- acm_notify_serial_state(acm);
-}
-
-static int acm_send_break(struct gserial *port, int duration)
-{
- struct f_acm *acm = port_to_acm(port);
- u16 state;
-
- state = acm->serial_state;
- state &= ~ACM_CTRL_BRK;
- if (duration)
- state |= ACM_CTRL_BRK;
-
- acm->serial_state = state;
- return acm_notify_serial_state(acm);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* ACM function driver setup/binding */
-static int
-acm_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_acm *acm = func_to_acm(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
-
- /* REVISIT might want instance-specific strings to help
- * distinguish instances ...
- */
-
- /* maybe allocate device-global string IDs, and patch descriptors */
- us = usb_gstrings_attach(cdev, acm_strings,
- ARRAY_SIZE(acm_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
- acm_control_interface_desc.iInterface = us[ACM_CTRL_IDX].id;
- acm_data_interface_desc.iInterface = us[ACM_DATA_IDX].id;
- acm_iad_descriptor.iFunction = us[ACM_IAD_IDX].id;
-
- /* allocate instance-specific interface IDs, and patch descriptors */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- acm->ctrl_id = status;
- acm_iad_descriptor.bFirstInterface = status;
-
- acm_control_interface_desc.bInterfaceNumber = status;
- acm_union_desc .bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- acm->data_id = status;
-
- acm_data_interface_desc.bInterfaceNumber = status;
- acm_union_desc.bSlaveInterface0 = status;
- acm_call_mgmt_descriptor.bDataInterface = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_in_desc);
- if (!ep)
- goto fail;
- acm->port.in = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_out_desc);
- if (!ep)
- goto fail;
- acm->port.out = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_notify_desc);
- if (!ep)
- goto fail;
- acm->notify = ep;
- ep->driver_data = cdev; /* claim */
-
- /* allocate notification */
- acm->notify_req = gs_alloc_req(ep,
- sizeof(struct usb_cdc_notification) + 2,
- GFP_KERNEL);
- if (!acm->notify_req)
- goto fail;
-
- acm->notify_req->complete = acm_cdc_notify_complete;
- acm->notify_req->context = acm;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- acm_hs_in_desc.bEndpointAddress = acm_fs_in_desc.bEndpointAddress;
- acm_hs_out_desc.bEndpointAddress = acm_fs_out_desc.bEndpointAddress;
- acm_hs_notify_desc.bEndpointAddress =
- acm_fs_notify_desc.bEndpointAddress;
-
- acm_ss_in_desc.bEndpointAddress = acm_fs_in_desc.bEndpointAddress;
- acm_ss_out_desc.bEndpointAddress = acm_fs_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, acm_fs_function, acm_hs_function,
- acm_ss_function);
- if (status)
- goto fail;
-
- DBG(cdev, "acm ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- acm->port_num,
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- acm->port.in->name, acm->port.out->name,
- acm->notify->name);
- return 0;
-
-fail:
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
-
- /* we might as well release our claims on endpoints */
- if (acm->notify)
- acm->notify->driver_data = NULL;
- if (acm->port.out)
- acm->port.out->driver_data = NULL;
- if (acm->port.in)
- acm->port.in->driver_data = NULL;
-
- ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
-
- return status;
-}
-
-static void acm_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_acm *acm = func_to_acm(f);
-
- acm_string_defs[0].id = 0;
- usb_free_all_descriptors(f);
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
-}
-
-static void acm_free_func(struct usb_function *f)
-{
- struct f_acm *acm = func_to_acm(f);
-
- kfree(acm);
-}
-
-static struct usb_function *acm_alloc_func(struct usb_function_instance *fi)
-{
- struct f_serial_opts *opts;
- struct f_acm *acm;
-
- acm = kzalloc(sizeof(*acm), GFP_KERNEL);
- if (!acm)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&acm->lock);
-
- acm->port.connect = acm_connect;
- acm->port.disconnect = acm_disconnect;
- acm->port.send_break = acm_send_break;
-
- acm->port.func.name = "acm";
- acm->port.func.strings = acm_strings;
- /* descriptors are per-instance copies */
- acm->port.func.bind = acm_bind;
- acm->port.func.set_alt = acm_set_alt;
- acm->port.func.setup = acm_setup;
- acm->port.func.disable = acm_disable;
-
- opts = container_of(fi, struct f_serial_opts, func_inst);
- acm->port_num = opts->port_num;
- acm->port.func.unbind = acm_unbind;
- acm->port.func.free_func = acm_free_func;
-
- return &acm->port.func;
-}
-
-static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_serial_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_serial_opts);
-static ssize_t f_acm_attr_show(struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
-{
- struct f_serial_opts *opts = to_f_serial_opts(item);
- struct f_serial_opts_attribute *f_serial_opts_attr =
- container_of(attr, struct f_serial_opts_attribute, attr);
- ssize_t ret = 0;
-
- if (f_serial_opts_attr->show)
- ret = f_serial_opts_attr->show(opts, page);
- return ret;
-}
-
-static void acm_attr_release(struct config_item *item)
-{
- struct f_serial_opts *opts = to_f_serial_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations acm_item_ops = {
- .release = acm_attr_release,
- .show_attribute = f_acm_attr_show,
-};
-
-static ssize_t f_acm_port_num_show(struct f_serial_opts *opts, char *page)
-{
- return sprintf(page, "%u\n", opts->port_num);
-}
-
-static struct f_serial_opts_attribute f_acm_port_num =
- __CONFIGFS_ATTR_RO(port_num, f_acm_port_num_show);
-
-
-static struct configfs_attribute *acm_attrs[] = {
- &f_acm_port_num.attr,
- NULL,
-};
-
-static struct config_item_type acm_func_type = {
- .ct_item_ops = &acm_item_ops,
- .ct_attrs = acm_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void acm_free_instance(struct usb_function_instance *fi)
-{
- struct f_serial_opts *opts;
-
- opts = container_of(fi, struct f_serial_opts, func_inst);
- gserial_free_line(opts->port_num);
- kfree(opts);
-}
-
-static struct usb_function_instance *acm_alloc_instance(void)
-{
- struct f_serial_opts *opts;
- int ret;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- opts->func_inst.free_func_inst = acm_free_instance;
- ret = gserial_alloc_line(&opts->port_num);
- if (ret) {
- kfree(opts);
- return ERR_PTR(ret);
- }
- config_group_init_type_name(&opts->func_inst.group, "",
- &acm_func_type);
- return &opts->func_inst;
-}
-DECLARE_USB_FUNCTION_INIT(acm, acm_alloc_instance, acm_alloc_func);
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * f_ecm.c -- USB CDC Ethernet (ECM) link function driver
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/etherdevice.h>
-
-#include "u_ether.h"
-#include "u_ether_configfs.h"
-#include "u_ecm.h"
-
-
-/*
- * This function is a "CDC Ethernet Networking Control Model" (CDC ECM)
- * Ethernet link. The data transfer model is simple (packets sent and
- * received over bulk endpoints using normal short packet termination),
- * and the control model exposes various data and optional notifications.
- *
- * ECM is well standardized and (except for Microsoft) supported by most
- * operating systems with USB host support. It's the preferred interop
- * solution for Ethernet over USB, at least for firmware based solutions.
- * (Hardware solutions tend to be more minimalist.) A newer and simpler
- * "Ethernet Emulation Model" (CDC EEM) hasn't yet caught on.
- *
- * Note that ECM requires the use of "alternate settings" for its data
- * interface. This means that the set_alt() method has real work to do,
- * and also means that a get_alt() method is required.
- */
-
-
-enum ecm_notify_state {
- ECM_NOTIFY_NONE, /* don't notify */
- ECM_NOTIFY_CONNECT, /* issue CONNECT next */
- ECM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */
-};
-
-struct f_ecm {
- struct gether port;
- u8 ctrl_id, data_id;
-
- char ethaddr[14];
-
- struct usb_ep *notify;
- struct usb_request *notify_req;
- u8 notify_state;
- bool is_open;
-
- /* FIXME is_open needs some irq-ish locking
- * ... possibly the same as port.ioport
- */
-};
-
-static inline struct f_ecm *func_to_ecm(struct usb_function *f)
-{
- return container_of(f, struct f_ecm, port.func);
-}
-
-/* peak (theoretical) bulk transfer rate in bits-per-second */
-static inline unsigned ecm_bitrate(struct usb_gadget *g)
-{
- if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
- return 13 * 1024 * 8 * 1000 * 8;
- else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
- return 13 * 512 * 8 * 1000 * 8;
- else
- return 19 * 64 * 1 * 1000 * 8;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Include the status endpoint if we can, even though it's optional.
- *
- * Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
- * packet, to simplify cancellation; and a big transfer interval, to
- * waste less bandwidth.
- *
- * Some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
- * if they ignore the connect/disconnect notifications that real aether
- * can provide. More advanced cdc configurations might want to support
- * encapsulated commands (vendor-specific, using control-OUT).
- */
-
-#define ECM_STATUS_INTERVAL_MS 32
-#define ECM_STATUS_BYTECOUNT 16 /* 8 byte header + data */
-
-
-/* interface descriptor: */
-
-static struct usb_interface_assoc_descriptor
-ecm_iad_descriptor = {
- .bLength = sizeof ecm_iad_descriptor,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- /* .bFirstInterface = DYNAMIC, */
- .bInterfaceCount = 2, /* control + data */
- .bFunctionClass = USB_CLASS_COMM,
- .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
- .bFunctionProtocol = USB_CDC_PROTO_NONE,
- /* .iFunction = DYNAMIC */
-};
-
-
-static struct usb_interface_descriptor ecm_control_intf = {
- .bLength = sizeof ecm_control_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- /* status endpoint is optional; this could be patched later */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
- .bInterfaceProtocol = USB_CDC_PROTO_NONE,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc ecm_header_desc = {
- .bLength = sizeof ecm_header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
-
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_union_desc ecm_union_desc = {
- .bLength = sizeof(ecm_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- /* .bMasterInterface0 = DYNAMIC */
- /* .bSlaveInterface0 = DYNAMIC */
-};
-
-static struct usb_cdc_ether_desc ecm_desc = {
- .bLength = sizeof ecm_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
-
- /* this descriptor actually adds value, surprise! */
- /* .iMACAddress = DYNAMIC */
- .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
- .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
- .wNumberMCFilters = cpu_to_le16(0),
- .bNumberPowerFilters = 0,
-};
-
-/* the default data interface has no endpoints ... */
-
-static struct usb_interface_descriptor ecm_data_nop_intf = {
- .bLength = sizeof ecm_data_nop_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bInterfaceNumber = 1,
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-/* ... but the "real" data interface has two bulk endpoints */
-
-static struct usb_interface_descriptor ecm_data_intf = {
- .bLength = sizeof ecm_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bInterfaceNumber = 1,
- .bAlternateSetting = 1,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_ecm_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT),
- .bInterval = ECM_STATUS_INTERVAL_MS,
-};
-
-static struct usb_endpoint_descriptor fs_ecm_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_ecm_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *ecm_fs_function[] = {
- /* CDC ECM control descriptors */
- (struct usb_descriptor_header *) &ecm_iad_descriptor,
- (struct usb_descriptor_header *) &ecm_control_intf,
- (struct usb_descriptor_header *) &ecm_header_desc,
- (struct usb_descriptor_header *) &ecm_union_desc,
- (struct usb_descriptor_header *) &ecm_desc,
-
- /* NOTE: status endpoint might need to be removed */
- (struct usb_descriptor_header *) &fs_ecm_notify_desc,
-
- /* data interface, altsettings 0 and 1 */
- (struct usb_descriptor_header *) &ecm_data_nop_intf,
- (struct usb_descriptor_header *) &ecm_data_intf,
- (struct usb_descriptor_header *) &fs_ecm_in_desc,
- (struct usb_descriptor_header *) &fs_ecm_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_ecm_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT),
- .bInterval = USB_MS_TO_HS_INTERVAL(ECM_STATUS_INTERVAL_MS),
-};
-
-static struct usb_endpoint_descriptor hs_ecm_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_ecm_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *ecm_hs_function[] = {
- /* CDC ECM control descriptors */
- (struct usb_descriptor_header *) &ecm_iad_descriptor,
- (struct usb_descriptor_header *) &ecm_control_intf,
- (struct usb_descriptor_header *) &ecm_header_desc,
- (struct usb_descriptor_header *) &ecm_union_desc,
- (struct usb_descriptor_header *) &ecm_desc,
-
- /* NOTE: status endpoint might need to be removed */
- (struct usb_descriptor_header *) &hs_ecm_notify_desc,
-
- /* data interface, altsettings 0 and 1 */
- (struct usb_descriptor_header *) &ecm_data_nop_intf,
- (struct usb_descriptor_header *) &ecm_data_intf,
- (struct usb_descriptor_header *) &hs_ecm_in_desc,
- (struct usb_descriptor_header *) &hs_ecm_out_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_ecm_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT),
- .bInterval = USB_MS_TO_HS_INTERVAL(ECM_STATUS_INTERVAL_MS),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_ecm_intr_comp_desc = {
- .bLength = sizeof ss_ecm_intr_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 3 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
- .wBytesPerInterval = cpu_to_le16(ECM_STATUS_BYTECOUNT),
-};
-
-static struct usb_endpoint_descriptor ss_ecm_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor ss_ecm_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_ecm_bulk_comp_desc = {
- .bLength = sizeof ss_ecm_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 2 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
-};
-
-static struct usb_descriptor_header *ecm_ss_function[] = {
- /* CDC ECM control descriptors */
- (struct usb_descriptor_header *) &ecm_iad_descriptor,
- (struct usb_descriptor_header *) &ecm_control_intf,
- (struct usb_descriptor_header *) &ecm_header_desc,
- (struct usb_descriptor_header *) &ecm_union_desc,
- (struct usb_descriptor_header *) &ecm_desc,
-
- /* NOTE: status endpoint might need to be removed */
- (struct usb_descriptor_header *) &ss_ecm_notify_desc,
- (struct usb_descriptor_header *) &ss_ecm_intr_comp_desc,
-
- /* data interface, altsettings 0 and 1 */
- (struct usb_descriptor_header *) &ecm_data_nop_intf,
- (struct usb_descriptor_header *) &ecm_data_intf,
- (struct usb_descriptor_header *) &ss_ecm_in_desc,
- (struct usb_descriptor_header *) &ss_ecm_bulk_comp_desc,
- (struct usb_descriptor_header *) &ss_ecm_out_desc,
- (struct usb_descriptor_header *) &ss_ecm_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-static struct usb_string ecm_string_defs[] = {
- [0].s = "CDC Ethernet Control Model (ECM)",
- [1].s = "",
- [2].s = "CDC Ethernet Data",
- [3].s = "CDC ECM",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings ecm_string_table = {
- .language = 0x0409, /* en-us */
- .strings = ecm_string_defs,
-};
-
-static struct usb_gadget_strings *ecm_strings[] = {
- &ecm_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static void ecm_do_notify(struct f_ecm *ecm)
-{
- struct usb_request *req = ecm->notify_req;
- struct usb_cdc_notification *event;
- struct usb_composite_dev *cdev = ecm->port.func.config->cdev;
- __le32 *data;
- int status;
-
- /* notification already in flight? */
- if (!req)
- return;
-
- event = req->buf;
- switch (ecm->notify_state) {
- case ECM_NOTIFY_NONE:
- return;
-
- case ECM_NOTIFY_CONNECT:
- event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
- if (ecm->is_open)
- event->wValue = cpu_to_le16(1);
- else
- event->wValue = cpu_to_le16(0);
- event->wLength = 0;
- req->length = sizeof *event;
-
- DBG(cdev, "notify connect %s\n",
- ecm->is_open ? "true" : "false");
- ecm->notify_state = ECM_NOTIFY_SPEED;
- break;
-
- case ECM_NOTIFY_SPEED:
- event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
- event->wValue = cpu_to_le16(0);
- event->wLength = cpu_to_le16(8);
- req->length = ECM_STATUS_BYTECOUNT;
-
- /* SPEED_CHANGE data is up/down speeds in bits/sec */
- data = req->buf + sizeof *event;
- data[0] = cpu_to_le32(ecm_bitrate(cdev->gadget));
- data[1] = data[0];
-
- DBG(cdev, "notify speed %d\n", ecm_bitrate(cdev->gadget));
- ecm->notify_state = ECM_NOTIFY_NONE;
- break;
- }
- event->bmRequestType = 0xA1;
- event->wIndex = cpu_to_le16(ecm->ctrl_id);
-
- ecm->notify_req = NULL;
- status = usb_ep_queue(ecm->notify, req, GFP_ATOMIC);
- if (status < 0) {
- ecm->notify_req = req;
- DBG(cdev, "notify --> %d\n", status);
- }
-}
-
-static void ecm_notify(struct f_ecm *ecm)
-{
- /* NOTE on most versions of Linux, host side cdc-ethernet
- * won't listen for notifications until its netdevice opens.
- * The first notification then sits in the FIFO for a long
- * time, and the second one is queued.
- */
- ecm->notify_state = ECM_NOTIFY_CONNECT;
- ecm_do_notify(ecm);
-}
-
-static void ecm_notify_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_ecm *ecm = req->context;
- struct usb_composite_dev *cdev = ecm->port.func.config->cdev;
- struct usb_cdc_notification *event = req->buf;
-
- switch (req->status) {
- case 0:
- /* no fault */
- break;
- case -ECONNRESET:
- case -ESHUTDOWN:
- ecm->notify_state = ECM_NOTIFY_NONE;
- break;
- default:
- DBG(cdev, "event %02x --> %d\n",
- event->bNotificationType, req->status);
- break;
- }
- ecm->notify_req = req;
- ecm_do_notify(ecm);
-}
-
-static int ecm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct f_ecm *ecm = func_to_ecm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /* composite driver infrastructure handles everything except
- * CDC class messages; interface activation uses set_alt().
- */
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SET_ETHERNET_PACKET_FILTER:
- /* see 6.2.30: no data, wIndex = interface,
- * wValue = packet filter bitmap
- */
- if (w_length != 0 || w_index != ecm->ctrl_id)
- goto invalid;
- DBG(cdev, "packet filter %02x\n", w_value);
- /* REVISIT locking of cdc_filter. This assumes the UDC
- * driver won't have a concurrent packet TX irq running on
- * another CPU; or that if it does, this write is atomic...
- */
- ecm->port.cdc_filter = w_value;
- value = 0;
- break;
-
- /* and optionally:
- * case USB_CDC_SEND_ENCAPSULATED_COMMAND:
- * case USB_CDC_GET_ENCAPSULATED_RESPONSE:
- * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
- * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
- * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
- * case USB_CDC_GET_ETHERNET_STATISTIC:
- */
-
- default:
-invalid:
- DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "ecm req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = 0;
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "ecm req %02x.%02x response err %d\n",
- ctrl->bRequestType, ctrl->bRequest,
- value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-
-static int ecm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_ecm *ecm = func_to_ecm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* Control interface has only altsetting 0 */
- if (intf == ecm->ctrl_id) {
- if (alt != 0)
- goto fail;
-
- if (ecm->notify->driver_data) {
- VDBG(cdev, "reset ecm control %d\n", intf);
- usb_ep_disable(ecm->notify);
- }
- if (!(ecm->notify->desc)) {
- VDBG(cdev, "init ecm ctrl %d\n", intf);
- if (config_ep_by_speed(cdev->gadget, f, ecm->notify))
- goto fail;
- }
- usb_ep_enable(ecm->notify);
- ecm->notify->driver_data = ecm;
-
- /* Data interface has two altsettings, 0 and 1 */
- } else if (intf == ecm->data_id) {
- if (alt > 1)
- goto fail;
-
- if (ecm->port.in_ep->driver_data) {
- DBG(cdev, "reset ecm\n");
- gether_disconnect(&ecm->port);
- }
-
- if (!ecm->port.in_ep->desc ||
- !ecm->port.out_ep->desc) {
- DBG(cdev, "init ecm\n");
- if (config_ep_by_speed(cdev->gadget, f,
- ecm->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f,
- ecm->port.out_ep)) {
- ecm->port.in_ep->desc = NULL;
- ecm->port.out_ep->desc = NULL;
- goto fail;
- }
- }
-
- /* CDC Ethernet only sends data in non-default altsettings.
- * Changing altsettings resets filters, statistics, etc.
- */
- if (alt == 1) {
- struct net_device *net;
-
- /* Enable zlps by default for ECM conformance;
- * override for musb_hdrc (avoids txdma ovhead).
- */
- ecm->port.is_zlp_ok = !(gadget_is_musbhdrc(cdev->gadget)
- );
- ecm->port.cdc_filter = DEFAULT_FILTER;
- DBG(cdev, "activate ecm\n");
- net = gether_connect(&ecm->port);
- if (IS_ERR(net))
- return PTR_ERR(net);
- }
-
- /* NOTE this can be a minor disagreement with the ECM spec,
- * which says speed notifications will "always" follow
- * connection notifications. But we allow one connect to
- * follow another (if the first is in flight), and instead
- * just guarantee that a speed notification is always sent.
- */
- ecm_notify(ecm);
- } else
- goto fail;
-
- return 0;
-fail:
- return -EINVAL;
-}
-
-/* Because the data interface supports multiple altsettings,
- * this ECM function *MUST* implement a get_alt() method.
- */
-static int ecm_get_alt(struct usb_function *f, unsigned intf)
-{
- struct f_ecm *ecm = func_to_ecm(f);
-
- if (intf == ecm->ctrl_id)
- return 0;
- return ecm->port.in_ep->driver_data ? 1 : 0;
-}
-
-static void ecm_disable(struct usb_function *f)
-{
- struct f_ecm *ecm = func_to_ecm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "ecm deactivated\n");
-
- if (ecm->port.in_ep->driver_data)
- gether_disconnect(&ecm->port);
-
- if (ecm->notify->driver_data) {
- usb_ep_disable(ecm->notify);
- ecm->notify->driver_data = NULL;
- ecm->notify->desc = NULL;
- }
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Callbacks let us notify the host about connect/disconnect when the
- * net device is opened or closed.
- *
- * For testing, note that link states on this side include both opened
- * and closed variants of:
- *
- * - disconnected/unconfigured
- * - configured but inactive (data alt 0)
- * - configured and active (data alt 1)
- *
- * Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and
- * SET_INTERFACE (altsetting). Remember also that "configured" doesn't
- * imply the host is actually polling the notification endpoint, and
- * likewise that "active" doesn't imply it's actually using the data
- * endpoints for traffic.
- */
-
-static void ecm_open(struct gether *geth)
-{
- struct f_ecm *ecm = func_to_ecm(&geth->func);
-
- DBG(ecm->port.func.config->cdev, "%s\n", __func__);
-
- ecm->is_open = true;
- ecm_notify(ecm);
-}
-
-static void ecm_close(struct gether *geth)
-{
- struct f_ecm *ecm = func_to_ecm(&geth->func);
-
- DBG(ecm->port.func.config->cdev, "%s\n", __func__);
-
- ecm->is_open = false;
- ecm_notify(ecm);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* ethernet function driver setup/binding */
-
-static int
-ecm_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_ecm *ecm = func_to_ecm(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
-
- struct f_ecm_opts *ecm_opts;
-
- if (!can_support_ecm(cdev->gadget))
- return -EINVAL;
-
- ecm_opts = container_of(f->fi, struct f_ecm_opts, func_inst);
-
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to ecm_opts->bound access
- */
- if (!ecm_opts->bound) {
- mutex_lock(&ecm_opts->lock);
- gether_set_gadget(ecm_opts->net, cdev->gadget);
- status = gether_register_netdev(ecm_opts->net);
- mutex_unlock(&ecm_opts->lock);
- if (status)
- return status;
- ecm_opts->bound = true;
- }
-
- us = usb_gstrings_attach(cdev, ecm_strings,
- ARRAY_SIZE(ecm_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
- ecm_control_intf.iInterface = us[0].id;
- ecm_data_intf.iInterface = us[2].id;
- ecm_desc.iMACAddress = us[1].id;
- ecm_iad_descriptor.iFunction = us[3].id;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ecm->ctrl_id = status;
- ecm_iad_descriptor.bFirstInterface = status;
-
- ecm_control_intf.bInterfaceNumber = status;
- ecm_union_desc.bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ecm->data_id = status;
-
- ecm_data_nop_intf.bInterfaceNumber = status;
- ecm_data_intf.bInterfaceNumber = status;
- ecm_union_desc.bSlaveInterface0 = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_ecm_in_desc);
- if (!ep)
- goto fail;
- ecm->port.in_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_ecm_out_desc);
- if (!ep)
- goto fail;
- ecm->port.out_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- /* NOTE: a status/notification endpoint is *OPTIONAL* but we
- * don't treat it that way. It's simpler, and some newer CDC
- * profiles (wireless handsets) no longer treat it as optional.
- */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_ecm_notify_desc);
- if (!ep)
- goto fail;
- ecm->notify = ep;
- ep->driver_data = cdev; /* claim */
-
- status = -ENOMEM;
-
- /* allocate notification request and buffer */
- ecm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
- if (!ecm->notify_req)
- goto fail;
- ecm->notify_req->buf = kmalloc(ECM_STATUS_BYTECOUNT, GFP_KERNEL);
- if (!ecm->notify_req->buf)
- goto fail;
- ecm->notify_req->context = ecm;
- ecm->notify_req->complete = ecm_notify_complete;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- hs_ecm_in_desc.bEndpointAddress = fs_ecm_in_desc.bEndpointAddress;
- hs_ecm_out_desc.bEndpointAddress = fs_ecm_out_desc.bEndpointAddress;
- hs_ecm_notify_desc.bEndpointAddress =
- fs_ecm_notify_desc.bEndpointAddress;
-
- ss_ecm_in_desc.bEndpointAddress = fs_ecm_in_desc.bEndpointAddress;
- ss_ecm_out_desc.bEndpointAddress = fs_ecm_out_desc.bEndpointAddress;
- ss_ecm_notify_desc.bEndpointAddress =
- fs_ecm_notify_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, ecm_fs_function, ecm_hs_function,
- ecm_ss_function);
- if (status)
- goto fail;
-
- /* NOTE: all that is done without knowing or caring about
- * the network link ... which is unavailable to this code
- * until we're activated via set_alt().
- */
-
- ecm->port.open = ecm_open;
- ecm->port.close = ecm_close;
-
- DBG(cdev, "CDC Ethernet: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- ecm->port.in_ep->name, ecm->port.out_ep->name,
- ecm->notify->name);
- return 0;
-
-fail:
- if (ecm->notify_req) {
- kfree(ecm->notify_req->buf);
- usb_ep_free_request(ecm->notify, ecm->notify_req);
- }
-
- /* we might as well release our claims on endpoints */
- if (ecm->notify)
- ecm->notify->driver_data = NULL;
- if (ecm->port.out_ep)
- ecm->port.out_ep->driver_data = NULL;
- if (ecm->port.in_ep)
- ecm->port.in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-static inline struct f_ecm_opts *to_f_ecm_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_ecm_opts,
- func_inst.group);
-}
-
-/* f_ecm_item_ops */
-USB_ETHERNET_CONFIGFS_ITEM(ecm);
-
-/* f_ecm_opts_dev_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ecm);
-
-/* f_ecm_opts_host_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ecm);
-
-/* f_ecm_opts_qmult */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ecm);
-
-/* f_ecm_opts_ifname */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ecm);
-
-static struct configfs_attribute *ecm_attrs[] = {
- &f_ecm_opts_dev_addr.attr,
- &f_ecm_opts_host_addr.attr,
- &f_ecm_opts_qmult.attr,
- &f_ecm_opts_ifname.attr,
- NULL,
-};
-
-static struct config_item_type ecm_func_type = {
- .ct_item_ops = &ecm_item_ops,
- .ct_attrs = ecm_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void ecm_free_inst(struct usb_function_instance *f)
-{
- struct f_ecm_opts *opts;
-
- opts = container_of(f, struct f_ecm_opts, func_inst);
- if (opts->bound)
- gether_cleanup(netdev_priv(opts->net));
- else
- free_netdev(opts->net);
- kfree(opts);
-}
-
-static struct usb_function_instance *ecm_alloc_inst(void)
-{
- struct f_ecm_opts *opts;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&opts->lock);
- opts->func_inst.free_func_inst = ecm_free_inst;
- opts->net = gether_setup_default();
- if (IS_ERR(opts->net)) {
- struct net_device *net = opts->net;
- kfree(opts);
- return ERR_CAST(net);
- }
-
- config_group_init_type_name(&opts->func_inst.group, "", &ecm_func_type);
-
- return &opts->func_inst;
-}
-
-static void ecm_free(struct usb_function *f)
-{
- struct f_ecm *ecm;
- struct f_ecm_opts *opts;
-
- ecm = func_to_ecm(f);
- opts = container_of(f->fi, struct f_ecm_opts, func_inst);
- kfree(ecm);
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-}
-
-static void ecm_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_ecm *ecm = func_to_ecm(f);
-
- DBG(c->cdev, "ecm unbind\n");
-
- usb_free_all_descriptors(f);
-
- kfree(ecm->notify_req->buf);
- usb_ep_free_request(ecm->notify, ecm->notify_req);
-}
-
-static struct usb_function *ecm_alloc(struct usb_function_instance *fi)
-{
- struct f_ecm *ecm;
- struct f_ecm_opts *opts;
- int status;
-
- /* allocate and initialize one new instance */
- ecm = kzalloc(sizeof(*ecm), GFP_KERNEL);
- if (!ecm)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_ecm_opts, func_inst);
- mutex_lock(&opts->lock);
- opts->refcnt++;
-
- /* export host's Ethernet address in CDC format */
- status = gether_get_host_addr_cdc(opts->net, ecm->ethaddr,
- sizeof(ecm->ethaddr));
- if (status < 12) {
- kfree(ecm);
- mutex_unlock(&opts->lock);
- return ERR_PTR(-EINVAL);
- }
- ecm_string_defs[1].s = ecm->ethaddr;
-
- ecm->port.ioport = netdev_priv(opts->net);
- mutex_unlock(&opts->lock);
- ecm->port.cdc_filter = DEFAULT_FILTER;
-
- ecm->port.func.name = "cdc_ethernet";
- /* descriptors are per-instance copies */
- ecm->port.func.bind = ecm_bind;
- ecm->port.func.unbind = ecm_unbind;
- ecm->port.func.set_alt = ecm_set_alt;
- ecm->port.func.get_alt = ecm_get_alt;
- ecm->port.func.setup = ecm_setup;
- ecm->port.func.disable = ecm_disable;
- ecm->port.func.free_func = ecm_free;
-
- return &ecm->port.func;
-}
-
-DECLARE_USB_FUNCTION_INIT(ecm, ecm_alloc_inst, ecm_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Brownell");
+++ /dev/null
-/*
- * f_eem.c -- USB CDC Ethernet (EEM) link function driver
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2008 Nokia Corporation
- * Copyright (C) 2009 EF Johnson Technologies
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/etherdevice.h>
-#include <linux/crc32.h>
-#include <linux/slab.h>
-
-#include "u_ether.h"
-#include "u_ether_configfs.h"
-#include "u_eem.h"
-
-#define EEM_HLEN 2
-
-/*
- * This function is a "CDC Ethernet Emulation Model" (CDC EEM)
- * Ethernet link.
- */
-
-struct f_eem {
- struct gether port;
- u8 ctrl_id;
-};
-
-static inline struct f_eem *func_to_eem(struct usb_function *f)
-{
- return container_of(f, struct f_eem, port.func);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* interface descriptor: */
-
-static struct usb_interface_descriptor eem_intf = {
- .bLength = sizeof eem_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_EEM,
- .bInterfaceProtocol = USB_CDC_PROTO_EEM,
- /* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor eem_fs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor eem_fs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *eem_fs_function[] = {
- /* CDC EEM control descriptors */
- (struct usb_descriptor_header *) &eem_intf,
- (struct usb_descriptor_header *) &eem_fs_in_desc,
- (struct usb_descriptor_header *) &eem_fs_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor eem_hs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor eem_hs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *eem_hs_function[] = {
- /* CDC EEM control descriptors */
- (struct usb_descriptor_header *) &eem_intf,
- (struct usb_descriptor_header *) &eem_hs_in_desc,
- (struct usb_descriptor_header *) &eem_hs_out_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor eem_ss_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor eem_ss_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor eem_ss_bulk_comp_desc = {
- .bLength = sizeof eem_ss_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 2 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
-};
-
-static struct usb_descriptor_header *eem_ss_function[] = {
- /* CDC EEM control descriptors */
- (struct usb_descriptor_header *) &eem_intf,
- (struct usb_descriptor_header *) &eem_ss_in_desc,
- (struct usb_descriptor_header *) &eem_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &eem_ss_out_desc,
- (struct usb_descriptor_header *) &eem_ss_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-static struct usb_string eem_string_defs[] = {
- [0].s = "CDC Ethernet Emulation Model (EEM)",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings eem_string_table = {
- .language = 0x0409, /* en-us */
- .strings = eem_string_defs,
-};
-
-static struct usb_gadget_strings *eem_strings[] = {
- &eem_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int eem_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct usb_composite_dev *cdev = f->config->cdev;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-
-static int eem_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_eem *eem = func_to_eem(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct net_device *net;
-
- /* we know alt == 0, so this is an activation or a reset */
- if (alt != 0)
- goto fail;
-
- if (intf == eem->ctrl_id) {
-
- if (eem->port.in_ep->driver_data) {
- DBG(cdev, "reset eem\n");
- gether_disconnect(&eem->port);
- }
-
- if (!eem->port.in_ep->desc || !eem->port.out_ep->desc) {
- DBG(cdev, "init eem\n");
- if (config_ep_by_speed(cdev->gadget, f,
- eem->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f,
- eem->port.out_ep)) {
- eem->port.in_ep->desc = NULL;
- eem->port.out_ep->desc = NULL;
- goto fail;
- }
- }
-
- /* zlps should not occur because zero-length EEM packets
- * will be inserted in those cases where they would occur
- */
- eem->port.is_zlp_ok = 1;
- eem->port.cdc_filter = DEFAULT_FILTER;
- DBG(cdev, "activate eem\n");
- net = gether_connect(&eem->port);
- if (IS_ERR(net))
- return PTR_ERR(net);
- } else
- goto fail;
-
- return 0;
-fail:
- return -EINVAL;
-}
-
-static void eem_disable(struct usb_function *f)
-{
- struct f_eem *eem = func_to_eem(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "eem deactivated\n");
-
- if (eem->port.in_ep->driver_data)
- gether_disconnect(&eem->port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* EEM function driver setup/binding */
-
-static int eem_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_eem *eem = func_to_eem(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
-
- struct f_eem_opts *eem_opts;
-
- eem_opts = container_of(f->fi, struct f_eem_opts, func_inst);
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to eem_opts->bound access
- */
- if (!eem_opts->bound) {
- mutex_lock(&eem_opts->lock);
- gether_set_gadget(eem_opts->net, cdev->gadget);
- status = gether_register_netdev(eem_opts->net);
- mutex_unlock(&eem_opts->lock);
- if (status)
- return status;
- eem_opts->bound = true;
- }
-
- us = usb_gstrings_attach(cdev, eem_strings,
- ARRAY_SIZE(eem_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
- eem_intf.iInterface = us[0].id;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- eem->ctrl_id = status;
- eem_intf.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &eem_fs_in_desc);
- if (!ep)
- goto fail;
- eem->port.in_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &eem_fs_out_desc);
- if (!ep)
- goto fail;
- eem->port.out_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- status = -ENOMEM;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- eem_hs_in_desc.bEndpointAddress = eem_fs_in_desc.bEndpointAddress;
- eem_hs_out_desc.bEndpointAddress = eem_fs_out_desc.bEndpointAddress;
-
- eem_ss_in_desc.bEndpointAddress = eem_fs_in_desc.bEndpointAddress;
- eem_ss_out_desc.bEndpointAddress = eem_fs_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, eem_fs_function, eem_hs_function,
- eem_ss_function);
- if (status)
- goto fail;
-
- DBG(cdev, "CDC Ethernet (EEM): %s speed IN/%s OUT/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- eem->port.in_ep->name, eem->port.out_ep->name);
- return 0;
-
-fail:
- usb_free_all_descriptors(f);
- if (eem->port.out_ep)
- eem->port.out_ep->driver_data = NULL;
- if (eem->port.in_ep)
- eem->port.in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-static void eem_cmd_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = (struct sk_buff *)req->context;
-
- dev_kfree_skb_any(skb);
-}
-
-/*
- * Add the EEM header and ethernet checksum.
- * We currently do not attempt to put multiple ethernet frames
- * into a single USB transfer
- */
-static struct sk_buff *eem_wrap(struct gether *port, struct sk_buff *skb)
-{
- struct sk_buff *skb2 = NULL;
- struct usb_ep *in = port->in_ep;
- int padlen = 0;
- u16 len = skb->len;
-
- int headroom = skb_headroom(skb);
- int tailroom = skb_tailroom(skb);
-
- /* When (len + EEM_HLEN + ETH_FCS_LEN) % in->maxpacket) is 0,
- * stick two bytes of zero-length EEM packet on the end.
- */
- if (((len + EEM_HLEN + ETH_FCS_LEN) % in->maxpacket) == 0)
- padlen += 2;
-
- if ((tailroom >= (ETH_FCS_LEN + padlen)) &&
- (headroom >= EEM_HLEN) && !skb_cloned(skb))
- goto done;
-
- skb2 = skb_copy_expand(skb, EEM_HLEN, ETH_FCS_LEN + padlen, GFP_ATOMIC);
- dev_kfree_skb_any(skb);
- skb = skb2;
- if (!skb)
- return skb;
-
-done:
- /* use the "no CRC" option */
- put_unaligned_be32(0xdeadbeef, skb_put(skb, 4));
-
- /* EEM packet header format:
- * b0..13: length of ethernet frame
- * b14: bmCRC (0 == sentinel CRC)
- * b15: bmType (0 == data)
- */
- len = skb->len;
- put_unaligned_le16(len & 0x3FFF, skb_push(skb, 2));
-
- /* add a zero-length EEM packet, if needed */
- if (padlen)
- put_unaligned_le16(0, skb_put(skb, 2));
-
- return skb;
-}
-
-/*
- * Remove the EEM header. Note that there can be many EEM packets in a single
- * USB transfer, so we need to break them out and handle them independently.
- */
-static int eem_unwrap(struct gether *port,
- struct sk_buff *skb,
- struct sk_buff_head *list)
-{
- struct usb_composite_dev *cdev = port->func.config->cdev;
- int status = 0;
-
- do {
- struct sk_buff *skb2;
- u16 header;
- u16 len = 0;
-
- if (skb->len < EEM_HLEN) {
- status = -EINVAL;
- DBG(cdev, "invalid EEM header\n");
- goto error;
- }
-
- /* remove the EEM header */
- header = get_unaligned_le16(skb->data);
- skb_pull(skb, EEM_HLEN);
-
- /* EEM packet header format:
- * b0..14: EEM type dependent (data or command)
- * b15: bmType (0 == data, 1 == command)
- */
- if (header & BIT(15)) {
- struct usb_request *req = cdev->req;
- u16 bmEEMCmd;
-
- /* EEM command packet format:
- * b0..10: bmEEMCmdParam
- * b11..13: bmEEMCmd
- * b14: reserved (must be zero)
- * b15: bmType (1 == command)
- */
- if (header & BIT(14))
- continue;
-
- bmEEMCmd = (header >> 11) & 0x7;
- switch (bmEEMCmd) {
- case 0: /* echo */
- len = header & 0x7FF;
- if (skb->len < len) {
- status = -EOVERFLOW;
- goto error;
- }
-
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (unlikely(!skb2)) {
- DBG(cdev, "EEM echo response error\n");
- goto next;
- }
- skb_trim(skb2, len);
- put_unaligned_le16(BIT(15) | BIT(11) | len,
- skb_push(skb2, 2));
- skb_copy_bits(skb2, 0, req->buf, skb2->len);
- req->length = skb2->len;
- req->complete = eem_cmd_complete;
- req->zero = 1;
- req->context = skb2;
- if (usb_ep_queue(port->in_ep, req, GFP_ATOMIC))
- DBG(cdev, "echo response queue fail\n");
- break;
-
- case 1: /* echo response */
- case 2: /* suspend hint */
- case 3: /* response hint */
- case 4: /* response complete hint */
- case 5: /* tickle */
- default: /* reserved */
- continue;
- }
- } else {
- u32 crc, crc2;
- struct sk_buff *skb3;
-
- /* check for zero-length EEM packet */
- if (header == 0)
- continue;
-
- /* EEM data packet format:
- * b0..13: length of ethernet frame
- * b14: bmCRC (0 == sentinel, 1 == calculated)
- * b15: bmType (0 == data)
- */
- len = header & 0x3FFF;
- if ((skb->len < len)
- || (len < (ETH_HLEN + ETH_FCS_LEN))) {
- status = -EINVAL;
- goto error;
- }
-
- /* validate CRC */
- if (header & BIT(14)) {
- crc = get_unaligned_le32(skb->data + len
- - ETH_FCS_LEN);
- crc2 = ~crc32_le(~0,
- skb->data, len - ETH_FCS_LEN);
- } else {
- crc = get_unaligned_be32(skb->data + len
- - ETH_FCS_LEN);
- crc2 = 0xdeadbeef;
- }
- if (crc != crc2) {
- DBG(cdev, "invalid EEM CRC\n");
- goto next;
- }
-
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (unlikely(!skb2)) {
- DBG(cdev, "unable to unframe EEM packet\n");
- continue;
- }
- skb_trim(skb2, len - ETH_FCS_LEN);
-
- skb3 = skb_copy_expand(skb2,
- NET_IP_ALIGN,
- 0,
- GFP_ATOMIC);
- if (unlikely(!skb3)) {
- DBG(cdev, "unable to realign EEM packet\n");
- dev_kfree_skb_any(skb2);
- continue;
- }
- dev_kfree_skb_any(skb2);
- skb_queue_tail(list, skb3);
- }
-next:
- skb_pull(skb, len);
- } while (skb->len);
-
-error:
- dev_kfree_skb_any(skb);
- return status;
-}
-
-static inline struct f_eem_opts *to_f_eem_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_eem_opts,
- func_inst.group);
-}
-
-/* f_eem_item_ops */
-USB_ETHERNET_CONFIGFS_ITEM(eem);
-
-/* f_eem_opts_dev_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(eem);
-
-/* f_eem_opts_host_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(eem);
-
-/* f_eem_opts_qmult */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(eem);
-
-/* f_eem_opts_ifname */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(eem);
-
-static struct configfs_attribute *eem_attrs[] = {
- &f_eem_opts_dev_addr.attr,
- &f_eem_opts_host_addr.attr,
- &f_eem_opts_qmult.attr,
- &f_eem_opts_ifname.attr,
- NULL,
-};
-
-static struct config_item_type eem_func_type = {
- .ct_item_ops = &eem_item_ops,
- .ct_attrs = eem_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void eem_free_inst(struct usb_function_instance *f)
-{
- struct f_eem_opts *opts;
-
- opts = container_of(f, struct f_eem_opts, func_inst);
- if (opts->bound)
- gether_cleanup(netdev_priv(opts->net));
- else
- free_netdev(opts->net);
- kfree(opts);
-}
-
-static struct usb_function_instance *eem_alloc_inst(void)
-{
- struct f_eem_opts *opts;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&opts->lock);
- opts->func_inst.free_func_inst = eem_free_inst;
- opts->net = gether_setup_default();
- if (IS_ERR(opts->net)) {
- struct net_device *net = opts->net;
- kfree(opts);
- return ERR_CAST(net);
- }
-
- config_group_init_type_name(&opts->func_inst.group, "", &eem_func_type);
-
- return &opts->func_inst;
-}
-
-static void eem_free(struct usb_function *f)
-{
- struct f_eem *eem;
- struct f_eem_opts *opts;
-
- eem = func_to_eem(f);
- opts = container_of(f->fi, struct f_eem_opts, func_inst);
- kfree(eem);
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-}
-
-static void eem_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- DBG(c->cdev, "eem unbind\n");
-
- usb_free_all_descriptors(f);
-}
-
-static struct usb_function *eem_alloc(struct usb_function_instance *fi)
-{
- struct f_eem *eem;
- struct f_eem_opts *opts;
-
- /* allocate and initialize one new instance */
- eem = kzalloc(sizeof(*eem), GFP_KERNEL);
- if (!eem)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_eem_opts, func_inst);
- mutex_lock(&opts->lock);
- opts->refcnt++;
-
- eem->port.ioport = netdev_priv(opts->net);
- mutex_unlock(&opts->lock);
- eem->port.cdc_filter = DEFAULT_FILTER;
-
- eem->port.func.name = "cdc_eem";
- /* descriptors are per-instance copies */
- eem->port.func.bind = eem_bind;
- eem->port.func.unbind = eem_unbind;
- eem->port.func.set_alt = eem_set_alt;
- eem->port.func.setup = eem_setup;
- eem->port.func.disable = eem_disable;
- eem->port.func.free_func = eem_free;
- eem->port.wrap = eem_wrap;
- eem->port.unwrap = eem_unwrap;
- eem->port.header_len = EEM_HLEN;
-
- return &eem->port.func;
-}
-
-DECLARE_USB_FUNCTION_INIT(eem, eem_alloc_inst, eem_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Brownell");
+++ /dev/null
-/*
- * f_fs.c -- user mode file system API for USB composite function controllers
- *
- * Copyright (C) 2010 Samsung Electronics
- * Author: Michal Nazarewicz <mina86@mina86.com>
- *
- * Based on inode.c (GadgetFS) which was:
- * Copyright (C) 2003-2004 David Brownell
- * Copyright (C) 2003 Agilent Technologies
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-
-/* #define DEBUG */
-/* #define VERBOSE_DEBUG */
-
-#include <linux/blkdev.h>
-#include <linux/pagemap.h>
-#include <linux/export.h>
-#include <linux/hid.h>
-#include <linux/module.h>
-#include <asm/unaligned.h>
-
-#include <linux/usb/composite.h>
-#include <linux/usb/functionfs.h>
-
-#include <linux/aio.h>
-#include <linux/mmu_context.h>
-#include <linux/poll.h>
-
-#include "u_fs.h"
-#include "u_f.h"
-#include "u_os_desc.h"
-#include "configfs.h"
-
-#define FUNCTIONFS_MAGIC 0xa647361 /* Chosen by a honest dice roll ;) */
-
-/* Reference counter handling */
-static void ffs_data_get(struct ffs_data *ffs);
-static void ffs_data_put(struct ffs_data *ffs);
-/* Creates new ffs_data object. */
-static struct ffs_data *__must_check ffs_data_new(void) __attribute__((malloc));
-
-/* Opened counter handling. */
-static void ffs_data_opened(struct ffs_data *ffs);
-static void ffs_data_closed(struct ffs_data *ffs);
-
-/* Called with ffs->mutex held; take over ownership of data. */
-static int __must_check
-__ffs_data_got_descs(struct ffs_data *ffs, char *data, size_t len);
-static int __must_check
-__ffs_data_got_strings(struct ffs_data *ffs, char *data, size_t len);
-
-
-/* The function structure ***************************************************/
-
-struct ffs_ep;
-
-struct ffs_function {
- struct usb_configuration *conf;
- struct usb_gadget *gadget;
- struct ffs_data *ffs;
-
- struct ffs_ep *eps;
- u8 eps_revmap[16];
- short *interfaces_nums;
-
- struct usb_function function;
-};
-
-
-static struct ffs_function *ffs_func_from_usb(struct usb_function *f)
-{
- return container_of(f, struct ffs_function, function);
-}
-
-
-static inline enum ffs_setup_state
-ffs_setup_state_clear_cancelled(struct ffs_data *ffs)
-{
- return (enum ffs_setup_state)
- cmpxchg(&ffs->setup_state, FFS_SETUP_CANCELLED, FFS_NO_SETUP);
-}
-
-
-static void ffs_func_eps_disable(struct ffs_function *func);
-static int __must_check ffs_func_eps_enable(struct ffs_function *func);
-
-static int ffs_func_bind(struct usb_configuration *,
- struct usb_function *);
-static int ffs_func_set_alt(struct usb_function *, unsigned, unsigned);
-static void ffs_func_disable(struct usb_function *);
-static int ffs_func_setup(struct usb_function *,
- const struct usb_ctrlrequest *);
-static void ffs_func_suspend(struct usb_function *);
-static void ffs_func_resume(struct usb_function *);
-
-
-static int ffs_func_revmap_ep(struct ffs_function *func, u8 num);
-static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf);
-
-
-/* The endpoints structures *************************************************/
-
-struct ffs_ep {
- struct usb_ep *ep; /* P: ffs->eps_lock */
- struct usb_request *req; /* P: epfile->mutex */
-
- /* [0]: full speed, [1]: high speed, [2]: super speed */
- struct usb_endpoint_descriptor *descs[3];
-
- u8 num;
-
- int status; /* P: epfile->mutex */
-};
-
-struct ffs_epfile {
- /* Protects ep->ep and ep->req. */
- struct mutex mutex;
- wait_queue_head_t wait;
-
- struct ffs_data *ffs;
- struct ffs_ep *ep; /* P: ffs->eps_lock */
-
- struct dentry *dentry;
-
- char name[5];
-
- unsigned char in; /* P: ffs->eps_lock */
- unsigned char isoc; /* P: ffs->eps_lock */
-
- unsigned char _pad;
-};
-
-/* ffs_io_data structure ***************************************************/
-
-struct ffs_io_data {
- bool aio;
- bool read;
-
- struct kiocb *kiocb;
- const struct iovec *iovec;
- unsigned long nr_segs;
- char __user *buf;
- size_t len;
-
- struct mm_struct *mm;
- struct work_struct work;
-
- struct usb_ep *ep;
- struct usb_request *req;
-};
-
-static int __must_check ffs_epfiles_create(struct ffs_data *ffs);
-static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count);
-
-static struct inode *__must_check
-ffs_sb_create_file(struct super_block *sb, const char *name, void *data,
- const struct file_operations *fops,
- struct dentry **dentry_p);
-
-/* Devices management *******************************************************/
-
-DEFINE_MUTEX(ffs_lock);
-EXPORT_SYMBOL_GPL(ffs_lock);
-
-static struct ffs_dev *_ffs_find_dev(const char *name);
-static struct ffs_dev *_ffs_alloc_dev(void);
-static int _ffs_name_dev(struct ffs_dev *dev, const char *name);
-static void _ffs_free_dev(struct ffs_dev *dev);
-static void *ffs_acquire_dev(const char *dev_name);
-static void ffs_release_dev(struct ffs_data *ffs_data);
-static int ffs_ready(struct ffs_data *ffs);
-static void ffs_closed(struct ffs_data *ffs);
-
-/* Misc helper functions ****************************************************/
-
-static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
- __attribute__((warn_unused_result, nonnull));
-static char *ffs_prepare_buffer(const char __user *buf, size_t len)
- __attribute__((warn_unused_result, nonnull));
-
-
-/* Control file aka ep0 *****************************************************/
-
-static void ffs_ep0_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct ffs_data *ffs = req->context;
-
- complete_all(&ffs->ep0req_completion);
-}
-
-static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
-{
- struct usb_request *req = ffs->ep0req;
- int ret;
-
- req->zero = len < le16_to_cpu(ffs->ev.setup.wLength);
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-
- req->buf = data;
- req->length = len;
-
- /*
- * UDC layer requires to provide a buffer even for ZLP, but should
- * not use it at all. Let's provide some poisoned pointer to catch
- * possible bug in the driver.
- */
- if (req->buf == NULL)
- req->buf = (void *)0xDEADBABE;
-
- reinit_completion(&ffs->ep0req_completion);
-
- ret = usb_ep_queue(ffs->gadget->ep0, req, GFP_ATOMIC);
- if (unlikely(ret < 0))
- return ret;
-
- ret = wait_for_completion_interruptible(&ffs->ep0req_completion);
- if (unlikely(ret)) {
- usb_ep_dequeue(ffs->gadget->ep0, req);
- return -EINTR;
- }
-
- ffs->setup_state = FFS_NO_SETUP;
- return req->status ? req->status : req->actual;
-}
-
-static int __ffs_ep0_stall(struct ffs_data *ffs)
-{
- if (ffs->ev.can_stall) {
- pr_vdebug("ep0 stall\n");
- usb_ep_set_halt(ffs->gadget->ep0);
- ffs->setup_state = FFS_NO_SETUP;
- return -EL2HLT;
- } else {
- pr_debug("bogus ep0 stall!\n");
- return -ESRCH;
- }
-}
-
-static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
- size_t len, loff_t *ptr)
-{
- struct ffs_data *ffs = file->private_data;
- ssize_t ret;
- char *data;
-
- ENTER();
-
- /* Fast check if setup was canceled */
- if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
- return -EIDRM;
-
- /* Acquire mutex */
- ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
- if (unlikely(ret < 0))
- return ret;
-
- /* Check state */
- switch (ffs->state) {
- case FFS_READ_DESCRIPTORS:
- case FFS_READ_STRINGS:
- /* Copy data */
- if (unlikely(len < 16)) {
- ret = -EINVAL;
- break;
- }
-
- data = ffs_prepare_buffer(buf, len);
- if (IS_ERR(data)) {
- ret = PTR_ERR(data);
- break;
- }
-
- /* Handle data */
- if (ffs->state == FFS_READ_DESCRIPTORS) {
- pr_info("read descriptors\n");
- ret = __ffs_data_got_descs(ffs, data, len);
- if (unlikely(ret < 0))
- break;
-
- ffs->state = FFS_READ_STRINGS;
- ret = len;
- } else {
- pr_info("read strings\n");
- ret = __ffs_data_got_strings(ffs, data, len);
- if (unlikely(ret < 0))
- break;
-
- ret = ffs_epfiles_create(ffs);
- if (unlikely(ret)) {
- ffs->state = FFS_CLOSING;
- break;
- }
-
- ffs->state = FFS_ACTIVE;
- mutex_unlock(&ffs->mutex);
-
- ret = ffs_ready(ffs);
- if (unlikely(ret < 0)) {
- ffs->state = FFS_CLOSING;
- return ret;
- }
-
- set_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags);
- return len;
- }
- break;
-
- case FFS_ACTIVE:
- data = NULL;
- /*
- * We're called from user space, we can use _irq
- * rather then _irqsave
- */
- spin_lock_irq(&ffs->ev.waitq.lock);
- switch (ffs_setup_state_clear_cancelled(ffs)) {
- case FFS_SETUP_CANCELLED:
- ret = -EIDRM;
- goto done_spin;
-
- case FFS_NO_SETUP:
- ret = -ESRCH;
- goto done_spin;
-
- case FFS_SETUP_PENDING:
- break;
- }
-
- /* FFS_SETUP_PENDING */
- if (!(ffs->ev.setup.bRequestType & USB_DIR_IN)) {
- spin_unlock_irq(&ffs->ev.waitq.lock);
- ret = __ffs_ep0_stall(ffs);
- break;
- }
-
- /* FFS_SETUP_PENDING and not stall */
- len = min(len, (size_t)le16_to_cpu(ffs->ev.setup.wLength));
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-
- data = ffs_prepare_buffer(buf, len);
- if (IS_ERR(data)) {
- ret = PTR_ERR(data);
- break;
- }
-
- spin_lock_irq(&ffs->ev.waitq.lock);
-
- /*
- * We are guaranteed to be still in FFS_ACTIVE state
- * but the state of setup could have changed from
- * FFS_SETUP_PENDING to FFS_SETUP_CANCELLED so we need
- * to check for that. If that happened we copied data
- * from user space in vain but it's unlikely.
- *
- * For sure we are not in FFS_NO_SETUP since this is
- * the only place FFS_SETUP_PENDING -> FFS_NO_SETUP
- * transition can be performed and it's protected by
- * mutex.
- */
- if (ffs_setup_state_clear_cancelled(ffs) ==
- FFS_SETUP_CANCELLED) {
- ret = -EIDRM;
-done_spin:
- spin_unlock_irq(&ffs->ev.waitq.lock);
- } else {
- /* unlocks spinlock */
- ret = __ffs_ep0_queue_wait(ffs, data, len);
- }
- kfree(data);
- break;
-
- default:
- ret = -EBADFD;
- break;
- }
-
- mutex_unlock(&ffs->mutex);
- return ret;
-}
-
-static ssize_t __ffs_ep0_read_events(struct ffs_data *ffs, char __user *buf,
- size_t n)
-{
- /*
- * We are holding ffs->ev.waitq.lock and ffs->mutex and we need
- * to release them.
- */
- struct usb_functionfs_event events[n];
- unsigned i = 0;
-
- memset(events, 0, sizeof events);
-
- do {
- events[i].type = ffs->ev.types[i];
- if (events[i].type == FUNCTIONFS_SETUP) {
- events[i].u.setup = ffs->ev.setup;
- ffs->setup_state = FFS_SETUP_PENDING;
- }
- } while (++i < n);
-
- if (n < ffs->ev.count) {
- ffs->ev.count -= n;
- memmove(ffs->ev.types, ffs->ev.types + n,
- ffs->ev.count * sizeof *ffs->ev.types);
- } else {
- ffs->ev.count = 0;
- }
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
- mutex_unlock(&ffs->mutex);
-
- return unlikely(__copy_to_user(buf, events, sizeof events))
- ? -EFAULT : sizeof events;
-}
-
-static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
- size_t len, loff_t *ptr)
-{
- struct ffs_data *ffs = file->private_data;
- char *data = NULL;
- size_t n;
- int ret;
-
- ENTER();
-
- /* Fast check if setup was canceled */
- if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
- return -EIDRM;
-
- /* Acquire mutex */
- ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
- if (unlikely(ret < 0))
- return ret;
-
- /* Check state */
- if (ffs->state != FFS_ACTIVE) {
- ret = -EBADFD;
- goto done_mutex;
- }
-
- /*
- * We're called from user space, we can use _irq rather then
- * _irqsave
- */
- spin_lock_irq(&ffs->ev.waitq.lock);
-
- switch (ffs_setup_state_clear_cancelled(ffs)) {
- case FFS_SETUP_CANCELLED:
- ret = -EIDRM;
- break;
-
- case FFS_NO_SETUP:
- n = len / sizeof(struct usb_functionfs_event);
- if (unlikely(!n)) {
- ret = -EINVAL;
- break;
- }
-
- if ((file->f_flags & O_NONBLOCK) && !ffs->ev.count) {
- ret = -EAGAIN;
- break;
- }
-
- if (wait_event_interruptible_exclusive_locked_irq(ffs->ev.waitq,
- ffs->ev.count)) {
- ret = -EINTR;
- break;
- }
-
- return __ffs_ep0_read_events(ffs, buf,
- min(n, (size_t)ffs->ev.count));
-
- case FFS_SETUP_PENDING:
- if (ffs->ev.setup.bRequestType & USB_DIR_IN) {
- spin_unlock_irq(&ffs->ev.waitq.lock);
- ret = __ffs_ep0_stall(ffs);
- goto done_mutex;
- }
-
- len = min(len, (size_t)le16_to_cpu(ffs->ev.setup.wLength));
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-
- if (likely(len)) {
- data = kmalloc(len, GFP_KERNEL);
- if (unlikely(!data)) {
- ret = -ENOMEM;
- goto done_mutex;
- }
- }
-
- spin_lock_irq(&ffs->ev.waitq.lock);
-
- /* See ffs_ep0_write() */
- if (ffs_setup_state_clear_cancelled(ffs) ==
- FFS_SETUP_CANCELLED) {
- ret = -EIDRM;
- break;
- }
-
- /* unlocks spinlock */
- ret = __ffs_ep0_queue_wait(ffs, data, len);
- if (likely(ret > 0) && unlikely(__copy_to_user(buf, data, len)))
- ret = -EFAULT;
- goto done_mutex;
-
- default:
- ret = -EBADFD;
- break;
- }
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-done_mutex:
- mutex_unlock(&ffs->mutex);
- kfree(data);
- return ret;
-}
-
-static int ffs_ep0_open(struct inode *inode, struct file *file)
-{
- struct ffs_data *ffs = inode->i_private;
-
- ENTER();
-
- if (unlikely(ffs->state == FFS_CLOSING))
- return -EBUSY;
-
- file->private_data = ffs;
- ffs_data_opened(ffs);
-
- return 0;
-}
-
-static int ffs_ep0_release(struct inode *inode, struct file *file)
-{
- struct ffs_data *ffs = file->private_data;
-
- ENTER();
-
- ffs_data_closed(ffs);
-
- return 0;
-}
-
-static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
-{
- struct ffs_data *ffs = file->private_data;
- struct usb_gadget *gadget = ffs->gadget;
- long ret;
-
- ENTER();
-
- if (code == FUNCTIONFS_INTERFACE_REVMAP) {
- struct ffs_function *func = ffs->func;
- ret = func ? ffs_func_revmap_intf(func, value) : -ENODEV;
- } else if (gadget && gadget->ops->ioctl) {
- ret = gadget->ops->ioctl(gadget, code, value);
- } else {
- ret = -ENOTTY;
- }
-
- return ret;
-}
-
-static unsigned int ffs_ep0_poll(struct file *file, poll_table *wait)
-{
- struct ffs_data *ffs = file->private_data;
- unsigned int mask = POLLWRNORM;
- int ret;
-
- poll_wait(file, &ffs->ev.waitq, wait);
-
- ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
- if (unlikely(ret < 0))
- return mask;
-
- switch (ffs->state) {
- case FFS_READ_DESCRIPTORS:
- case FFS_READ_STRINGS:
- mask |= POLLOUT;
- break;
-
- case FFS_ACTIVE:
- switch (ffs->setup_state) {
- case FFS_NO_SETUP:
- if (ffs->ev.count)
- mask |= POLLIN;
- break;
-
- case FFS_SETUP_PENDING:
- case FFS_SETUP_CANCELLED:
- mask |= (POLLIN | POLLOUT);
- break;
- }
- case FFS_CLOSING:
- break;
- }
-
- mutex_unlock(&ffs->mutex);
-
- return mask;
-}
-
-static const struct file_operations ffs_ep0_operations = {
- .llseek = no_llseek,
-
- .open = ffs_ep0_open,
- .write = ffs_ep0_write,
- .read = ffs_ep0_read,
- .release = ffs_ep0_release,
- .unlocked_ioctl = ffs_ep0_ioctl,
- .poll = ffs_ep0_poll,
-};
-
-
-/* "Normal" endpoints operations ********************************************/
-
-static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req)
-{
- ENTER();
- if (likely(req->context)) {
- struct ffs_ep *ep = _ep->driver_data;
- ep->status = req->status ? req->status : req->actual;
- complete(req->context);
- }
-}
-
-static void ffs_user_copy_worker(struct work_struct *work)
-{
- struct ffs_io_data *io_data = container_of(work, struct ffs_io_data,
- work);
- int ret = io_data->req->status ? io_data->req->status :
- io_data->req->actual;
-
- if (io_data->read && ret > 0) {
- int i;
- size_t pos = 0;
- use_mm(io_data->mm);
- for (i = 0; i < io_data->nr_segs; i++) {
- if (unlikely(copy_to_user(io_data->iovec[i].iov_base,
- &io_data->buf[pos],
- io_data->iovec[i].iov_len))) {
- ret = -EFAULT;
- break;
- }
- pos += io_data->iovec[i].iov_len;
- }
- unuse_mm(io_data->mm);
- }
-
- aio_complete(io_data->kiocb, ret, ret);
-
- usb_ep_free_request(io_data->ep, io_data->req);
-
- io_data->kiocb->private = NULL;
- if (io_data->read)
- kfree(io_data->iovec);
- kfree(io_data->buf);
- kfree(io_data);
-}
-
-static void ffs_epfile_async_io_complete(struct usb_ep *_ep,
- struct usb_request *req)
-{
- struct ffs_io_data *io_data = req->context;
-
- ENTER();
-
- INIT_WORK(&io_data->work, ffs_user_copy_worker);
- schedule_work(&io_data->work);
-}
-
-static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
-{
- struct ffs_epfile *epfile = file->private_data;
- struct ffs_ep *ep;
- char *data = NULL;
- ssize_t ret, data_len;
- int halt;
-
- /* Are we still active? */
- if (WARN_ON(epfile->ffs->state != FFS_ACTIVE)) {
- ret = -ENODEV;
- goto error;
- }
-
- /* Wait for endpoint to be enabled */
- ep = epfile->ep;
- if (!ep) {
- if (file->f_flags & O_NONBLOCK) {
- ret = -EAGAIN;
- goto error;
- }
-
- ret = wait_event_interruptible(epfile->wait, (ep = epfile->ep));
- if (ret) {
- ret = -EINTR;
- goto error;
- }
- }
-
- /* Do we halt? */
- halt = (!io_data->read == !epfile->in);
- if (halt && epfile->isoc) {
- ret = -EINVAL;
- goto error;
- }
-
- /* Allocate & copy */
- if (!halt) {
- /*
- * if we _do_ wait above, the epfile->ffs->gadget might be NULL
- * before the waiting completes, so do not assign to 'gadget' earlier
- */
- struct usb_gadget *gadget = epfile->ffs->gadget;
-
- spin_lock_irq(&epfile->ffs->eps_lock);
- /* In the meantime, endpoint got disabled or changed. */
- if (epfile->ep != ep) {
- spin_unlock_irq(&epfile->ffs->eps_lock);
- return -ESHUTDOWN;
- }
- /*
- * Controller may require buffer size to be aligned to
- * maxpacketsize of an out endpoint.
- */
- data_len = io_data->read ?
- usb_ep_align_maybe(gadget, ep->ep, io_data->len) :
- io_data->len;
- spin_unlock_irq(&epfile->ffs->eps_lock);
-
- data = kmalloc(data_len, GFP_KERNEL);
- if (unlikely(!data))
- return -ENOMEM;
- if (io_data->aio && !io_data->read) {
- int i;
- size_t pos = 0;
- for (i = 0; i < io_data->nr_segs; i++) {
- if (unlikely(copy_from_user(&data[pos],
- io_data->iovec[i].iov_base,
- io_data->iovec[i].iov_len))) {
- ret = -EFAULT;
- goto error;
- }
- pos += io_data->iovec[i].iov_len;
- }
- } else {
- if (!io_data->read &&
- unlikely(__copy_from_user(data, io_data->buf,
- io_data->len))) {
- ret = -EFAULT;
- goto error;
- }
- }
- }
-
- /* We will be using request */
- ret = ffs_mutex_lock(&epfile->mutex, file->f_flags & O_NONBLOCK);
- if (unlikely(ret))
- goto error;
-
- spin_lock_irq(&epfile->ffs->eps_lock);
-
- if (epfile->ep != ep) {
- /* In the meantime, endpoint got disabled or changed. */
- ret = -ESHUTDOWN;
- spin_unlock_irq(&epfile->ffs->eps_lock);
- } else if (halt) {
- /* Halt */
- if (likely(epfile->ep == ep) && !WARN_ON(!ep->ep))
- usb_ep_set_halt(ep->ep);
- spin_unlock_irq(&epfile->ffs->eps_lock);
- ret = -EBADMSG;
- } else {
- /* Fire the request */
- struct usb_request *req;
-
- if (io_data->aio) {
- req = usb_ep_alloc_request(ep->ep, GFP_KERNEL);
- if (unlikely(!req))
- goto error_lock;
-
- req->buf = data;
- req->length = io_data->len;
-
- io_data->buf = data;
- io_data->ep = ep->ep;
- io_data->req = req;
-
- req->context = io_data;
- req->complete = ffs_epfile_async_io_complete;
-
- ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
- if (unlikely(ret)) {
- usb_ep_free_request(ep->ep, req);
- goto error_lock;
- }
- ret = -EIOCBQUEUED;
-
- spin_unlock_irq(&epfile->ffs->eps_lock);
- } else {
- DECLARE_COMPLETION_ONSTACK(done);
-
- req = ep->req;
- req->buf = data;
- req->length = io_data->len;
-
- req->context = &done;
- req->complete = ffs_epfile_io_complete;
-
- ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
-
- spin_unlock_irq(&epfile->ffs->eps_lock);
-
- if (unlikely(ret < 0)) {
- /* nop */
- } else if (unlikely(
- wait_for_completion_interruptible(&done))) {
- ret = -EINTR;
- usb_ep_dequeue(ep->ep, req);
- } else {
- /*
- * XXX We may end up silently droping data
- * here. Since data_len (i.e. req->length) may
- * be bigger than len (after being rounded up
- * to maxpacketsize), we may end up with more
- * data then user space has space for.
- */
- ret = ep->status;
- if (io_data->read && ret > 0) {
- ret = min_t(size_t, ret, io_data->len);
-
- if (unlikely(copy_to_user(io_data->buf,
- data, ret)))
- ret = -EFAULT;
- }
- }
- kfree(data);
- }
- }
-
- mutex_unlock(&epfile->mutex);
- return ret;
-
-error_lock:
- spin_unlock_irq(&epfile->ffs->eps_lock);
- mutex_unlock(&epfile->mutex);
-error:
- kfree(data);
- return ret;
-}
-
-static ssize_t
-ffs_epfile_write(struct file *file, const char __user *buf, size_t len,
- loff_t *ptr)
-{
- struct ffs_io_data io_data;
-
- ENTER();
-
- io_data.aio = false;
- io_data.read = false;
- io_data.buf = (char * __user)buf;
- io_data.len = len;
-
- return ffs_epfile_io(file, &io_data);
-}
-
-static ssize_t
-ffs_epfile_read(struct file *file, char __user *buf, size_t len, loff_t *ptr)
-{
- struct ffs_io_data io_data;
-
- ENTER();
-
- io_data.aio = false;
- io_data.read = true;
- io_data.buf = buf;
- io_data.len = len;
-
- return ffs_epfile_io(file, &io_data);
-}
-
-static int
-ffs_epfile_open(struct inode *inode, struct file *file)
-{
- struct ffs_epfile *epfile = inode->i_private;
-
- ENTER();
-
- if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
- return -ENODEV;
-
- file->private_data = epfile;
- ffs_data_opened(epfile->ffs);
-
- return 0;
-}
-
-static int ffs_aio_cancel(struct kiocb *kiocb)
-{
- struct ffs_io_data *io_data = kiocb->private;
- struct ffs_epfile *epfile = kiocb->ki_filp->private_data;
- int value;
-
- ENTER();
-
- spin_lock_irq(&epfile->ffs->eps_lock);
-
- if (likely(io_data && io_data->ep && io_data->req))
- value = usb_ep_dequeue(io_data->ep, io_data->req);
- else
- value = -EINVAL;
-
- spin_unlock_irq(&epfile->ffs->eps_lock);
-
- return value;
-}
-
-static ssize_t ffs_epfile_aio_write(struct kiocb *kiocb,
- const struct iovec *iovec,
- unsigned long nr_segs, loff_t loff)
-{
- struct ffs_io_data *io_data;
-
- ENTER();
-
- io_data = kmalloc(sizeof(*io_data), GFP_KERNEL);
- if (unlikely(!io_data))
- return -ENOMEM;
-
- io_data->aio = true;
- io_data->read = false;
- io_data->kiocb = kiocb;
- io_data->iovec = iovec;
- io_data->nr_segs = nr_segs;
- io_data->len = kiocb->ki_nbytes;
- io_data->mm = current->mm;
-
- kiocb->private = io_data;
-
- kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
-
- return ffs_epfile_io(kiocb->ki_filp, io_data);
-}
-
-static ssize_t ffs_epfile_aio_read(struct kiocb *kiocb,
- const struct iovec *iovec,
- unsigned long nr_segs, loff_t loff)
-{
- struct ffs_io_data *io_data;
- struct iovec *iovec_copy;
-
- ENTER();
-
- iovec_copy = kmalloc_array(nr_segs, sizeof(*iovec_copy), GFP_KERNEL);
- if (unlikely(!iovec_copy))
- return -ENOMEM;
-
- memcpy(iovec_copy, iovec, sizeof(struct iovec)*nr_segs);
-
- io_data = kmalloc(sizeof(*io_data), GFP_KERNEL);
- if (unlikely(!io_data)) {
- kfree(iovec_copy);
- return -ENOMEM;
- }
-
- io_data->aio = true;
- io_data->read = true;
- io_data->kiocb = kiocb;
- io_data->iovec = iovec_copy;
- io_data->nr_segs = nr_segs;
- io_data->len = kiocb->ki_nbytes;
- io_data->mm = current->mm;
-
- kiocb->private = io_data;
-
- kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
-
- return ffs_epfile_io(kiocb->ki_filp, io_data);
-}
-
-static int
-ffs_epfile_release(struct inode *inode, struct file *file)
-{
- struct ffs_epfile *epfile = inode->i_private;
-
- ENTER();
-
- ffs_data_closed(epfile->ffs);
-
- return 0;
-}
-
-static long ffs_epfile_ioctl(struct file *file, unsigned code,
- unsigned long value)
-{
- struct ffs_epfile *epfile = file->private_data;
- int ret;
-
- ENTER();
-
- if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
- return -ENODEV;
-
- spin_lock_irq(&epfile->ffs->eps_lock);
- if (likely(epfile->ep)) {
- switch (code) {
- case FUNCTIONFS_FIFO_STATUS:
- ret = usb_ep_fifo_status(epfile->ep->ep);
- break;
- case FUNCTIONFS_FIFO_FLUSH:
- usb_ep_fifo_flush(epfile->ep->ep);
- ret = 0;
- break;
- case FUNCTIONFS_CLEAR_HALT:
- ret = usb_ep_clear_halt(epfile->ep->ep);
- break;
- case FUNCTIONFS_ENDPOINT_REVMAP:
- ret = epfile->ep->num;
- break;
- default:
- ret = -ENOTTY;
- }
- } else {
- ret = -ENODEV;
- }
- spin_unlock_irq(&epfile->ffs->eps_lock);
-
- return ret;
-}
-
-static const struct file_operations ffs_epfile_operations = {
- .llseek = no_llseek,
-
- .open = ffs_epfile_open,
- .write = ffs_epfile_write,
- .read = ffs_epfile_read,
- .aio_write = ffs_epfile_aio_write,
- .aio_read = ffs_epfile_aio_read,
- .release = ffs_epfile_release,
- .unlocked_ioctl = ffs_epfile_ioctl,
-};
-
-
-/* File system and super block operations ***********************************/
-
-/*
- * Mounting the file system creates a controller file, used first for
- * function configuration then later for event monitoring.
- */
-
-static struct inode *__must_check
-ffs_sb_make_inode(struct super_block *sb, void *data,
- const struct file_operations *fops,
- const struct inode_operations *iops,
- struct ffs_file_perms *perms)
-{
- struct inode *inode;
-
- ENTER();
-
- inode = new_inode(sb);
-
- if (likely(inode)) {
- struct timespec current_time = CURRENT_TIME;
-
- inode->i_ino = get_next_ino();
- inode->i_mode = perms->mode;
- inode->i_uid = perms->uid;
- inode->i_gid = perms->gid;
- inode->i_atime = current_time;
- inode->i_mtime = current_time;
- inode->i_ctime = current_time;
- inode->i_private = data;
- if (fops)
- inode->i_fop = fops;
- if (iops)
- inode->i_op = iops;
- }
-
- return inode;
-}
-
-/* Create "regular" file */
-static struct inode *ffs_sb_create_file(struct super_block *sb,
- const char *name, void *data,
- const struct file_operations *fops,
- struct dentry **dentry_p)
-{
- struct ffs_data *ffs = sb->s_fs_info;
- struct dentry *dentry;
- struct inode *inode;
-
- ENTER();
-
- dentry = d_alloc_name(sb->s_root, name);
- if (unlikely(!dentry))
- return NULL;
-
- inode = ffs_sb_make_inode(sb, data, fops, NULL, &ffs->file_perms);
- if (unlikely(!inode)) {
- dput(dentry);
- return NULL;
- }
-
- d_add(dentry, inode);
- if (dentry_p)
- *dentry_p = dentry;
-
- return inode;
-}
-
-/* Super block */
-static const struct super_operations ffs_sb_operations = {
- .statfs = simple_statfs,
- .drop_inode = generic_delete_inode,
-};
-
-struct ffs_sb_fill_data {
- struct ffs_file_perms perms;
- umode_t root_mode;
- const char *dev_name;
- struct ffs_data *ffs_data;
-};
-
-static int ffs_sb_fill(struct super_block *sb, void *_data, int silent)
-{
- struct ffs_sb_fill_data *data = _data;
- struct inode *inode;
- struct ffs_data *ffs = data->ffs_data;
-
- ENTER();
-
- ffs->sb = sb;
- data->ffs_data = NULL;
- sb->s_fs_info = ffs;
- sb->s_blocksize = PAGE_CACHE_SIZE;
- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- sb->s_magic = FUNCTIONFS_MAGIC;
- sb->s_op = &ffs_sb_operations;
- sb->s_time_gran = 1;
-
- /* Root inode */
- data->perms.mode = data->root_mode;
- inode = ffs_sb_make_inode(sb, NULL,
- &simple_dir_operations,
- &simple_dir_inode_operations,
- &data->perms);
- sb->s_root = d_make_root(inode);
- if (unlikely(!sb->s_root))
- return -ENOMEM;
-
- /* EP0 file */
- if (unlikely(!ffs_sb_create_file(sb, "ep0", ffs,
- &ffs_ep0_operations, NULL)))
- return -ENOMEM;
-
- return 0;
-}
-
-static int ffs_fs_parse_opts(struct ffs_sb_fill_data *data, char *opts)
-{
- ENTER();
-
- if (!opts || !*opts)
- return 0;
-
- for (;;) {
- unsigned long value;
- char *eq, *comma;
-
- /* Option limit */
- comma = strchr(opts, ',');
- if (comma)
- *comma = 0;
-
- /* Value limit */
- eq = strchr(opts, '=');
- if (unlikely(!eq)) {
- pr_err("'=' missing in %s\n", opts);
- return -EINVAL;
- }
- *eq = 0;
-
- /* Parse value */
- if (kstrtoul(eq + 1, 0, &value)) {
- pr_err("%s: invalid value: %s\n", opts, eq + 1);
- return -EINVAL;
- }
-
- /* Interpret option */
- switch (eq - opts) {
- case 5:
- if (!memcmp(opts, "rmode", 5))
- data->root_mode = (value & 0555) | S_IFDIR;
- else if (!memcmp(opts, "fmode", 5))
- data->perms.mode = (value & 0666) | S_IFREG;
- else
- goto invalid;
- break;
-
- case 4:
- if (!memcmp(opts, "mode", 4)) {
- data->root_mode = (value & 0555) | S_IFDIR;
- data->perms.mode = (value & 0666) | S_IFREG;
- } else {
- goto invalid;
- }
- break;
-
- case 3:
- if (!memcmp(opts, "uid", 3)) {
- data->perms.uid = make_kuid(current_user_ns(), value);
- if (!uid_valid(data->perms.uid)) {
- pr_err("%s: unmapped value: %lu\n", opts, value);
- return -EINVAL;
- }
- } else if (!memcmp(opts, "gid", 3)) {
- data->perms.gid = make_kgid(current_user_ns(), value);
- if (!gid_valid(data->perms.gid)) {
- pr_err("%s: unmapped value: %lu\n", opts, value);
- return -EINVAL;
- }
- } else {
- goto invalid;
- }
- break;
-
- default:
-invalid:
- pr_err("%s: invalid option\n", opts);
- return -EINVAL;
- }
-
- /* Next iteration */
- if (!comma)
- break;
- opts = comma + 1;
- }
-
- return 0;
-}
-
-/* "mount -t functionfs dev_name /dev/function" ends up here */
-
-static struct dentry *
-ffs_fs_mount(struct file_system_type *t, int flags,
- const char *dev_name, void *opts)
-{
- struct ffs_sb_fill_data data = {
- .perms = {
- .mode = S_IFREG | 0600,
- .uid = GLOBAL_ROOT_UID,
- .gid = GLOBAL_ROOT_GID,
- },
- .root_mode = S_IFDIR | 0500,
- };
- struct dentry *rv;
- int ret;
- void *ffs_dev;
- struct ffs_data *ffs;
-
- ENTER();
-
- ret = ffs_fs_parse_opts(&data, opts);
- if (unlikely(ret < 0))
- return ERR_PTR(ret);
-
- ffs = ffs_data_new();
- if (unlikely(!ffs))
- return ERR_PTR(-ENOMEM);
- ffs->file_perms = data.perms;
-
- ffs->dev_name = kstrdup(dev_name, GFP_KERNEL);
- if (unlikely(!ffs->dev_name)) {
- ffs_data_put(ffs);
- return ERR_PTR(-ENOMEM);
- }
-
- ffs_dev = ffs_acquire_dev(dev_name);
- if (IS_ERR(ffs_dev)) {
- ffs_data_put(ffs);
- return ERR_CAST(ffs_dev);
- }
- ffs->private_data = ffs_dev;
- data.ffs_data = ffs;
-
- rv = mount_nodev(t, flags, &data, ffs_sb_fill);
- if (IS_ERR(rv) && data.ffs_data) {
- ffs_release_dev(data.ffs_data);
- ffs_data_put(data.ffs_data);
- }
- return rv;
-}
-
-static void
-ffs_fs_kill_sb(struct super_block *sb)
-{
- ENTER();
-
- kill_litter_super(sb);
- if (sb->s_fs_info) {
- ffs_release_dev(sb->s_fs_info);
- ffs_data_put(sb->s_fs_info);
- }
-}
-
-static struct file_system_type ffs_fs_type = {
- .owner = THIS_MODULE,
- .name = "functionfs",
- .mount = ffs_fs_mount,
- .kill_sb = ffs_fs_kill_sb,
-};
-MODULE_ALIAS_FS("functionfs");
-
-
-/* Driver's main init/cleanup functions *************************************/
-
-static int functionfs_init(void)
-{
- int ret;
-
- ENTER();
-
- ret = register_filesystem(&ffs_fs_type);
- if (likely(!ret))
- pr_info("file system registered\n");
- else
- pr_err("failed registering file system (%d)\n", ret);
-
- return ret;
-}
-
-static void functionfs_cleanup(void)
-{
- ENTER();
-
- pr_info("unloading\n");
- unregister_filesystem(&ffs_fs_type);
-}
-
-
-/* ffs_data and ffs_function construction and destruction code **************/
-
-static void ffs_data_clear(struct ffs_data *ffs);
-static void ffs_data_reset(struct ffs_data *ffs);
-
-static void ffs_data_get(struct ffs_data *ffs)
-{
- ENTER();
-
- atomic_inc(&ffs->ref);
-}
-
-static void ffs_data_opened(struct ffs_data *ffs)
-{
- ENTER();
-
- atomic_inc(&ffs->ref);
- atomic_inc(&ffs->opened);
-}
-
-static void ffs_data_put(struct ffs_data *ffs)
-{
- ENTER();
-
- if (unlikely(atomic_dec_and_test(&ffs->ref))) {
- pr_info("%s(): freeing\n", __func__);
- ffs_data_clear(ffs);
- BUG_ON(waitqueue_active(&ffs->ev.waitq) ||
- waitqueue_active(&ffs->ep0req_completion.wait));
- kfree(ffs->dev_name);
- kfree(ffs);
- }
-}
-
-static void ffs_data_closed(struct ffs_data *ffs)
-{
- ENTER();
-
- if (atomic_dec_and_test(&ffs->opened)) {
- ffs->state = FFS_CLOSING;
- ffs_data_reset(ffs);
- }
-
- ffs_data_put(ffs);
-}
-
-static struct ffs_data *ffs_data_new(void)
-{
- struct ffs_data *ffs = kzalloc(sizeof *ffs, GFP_KERNEL);
- if (unlikely(!ffs))
- return NULL;
-
- ENTER();
-
- atomic_set(&ffs->ref, 1);
- atomic_set(&ffs->opened, 0);
- ffs->state = FFS_READ_DESCRIPTORS;
- mutex_init(&ffs->mutex);
- spin_lock_init(&ffs->eps_lock);
- init_waitqueue_head(&ffs->ev.waitq);
- init_completion(&ffs->ep0req_completion);
-
- /* XXX REVISIT need to update it in some places, or do we? */
- ffs->ev.can_stall = 1;
-
- return ffs;
-}
-
-static void ffs_data_clear(struct ffs_data *ffs)
-{
- ENTER();
-
- if (test_and_clear_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags))
- ffs_closed(ffs);
-
- BUG_ON(ffs->gadget);
-
- if (ffs->epfiles)
- ffs_epfiles_destroy(ffs->epfiles, ffs->eps_count);
-
- kfree(ffs->raw_descs_data);
- kfree(ffs->raw_strings);
- kfree(ffs->stringtabs);
-}
-
-static void ffs_data_reset(struct ffs_data *ffs)
-{
- ENTER();
-
- ffs_data_clear(ffs);
-
- ffs->epfiles = NULL;
- ffs->raw_descs_data = NULL;
- ffs->raw_descs = NULL;
- ffs->raw_strings = NULL;
- ffs->stringtabs = NULL;
-
- ffs->raw_descs_length = 0;
- ffs->fs_descs_count = 0;
- ffs->hs_descs_count = 0;
- ffs->ss_descs_count = 0;
-
- ffs->strings_count = 0;
- ffs->interfaces_count = 0;
- ffs->eps_count = 0;
-
- ffs->ev.count = 0;
-
- ffs->state = FFS_READ_DESCRIPTORS;
- ffs->setup_state = FFS_NO_SETUP;
- ffs->flags = 0;
-}
-
-
-static int functionfs_bind(struct ffs_data *ffs, struct usb_composite_dev *cdev)
-{
- struct usb_gadget_strings **lang;
- int first_id;
-
- ENTER();
-
- if (WARN_ON(ffs->state != FFS_ACTIVE
- || test_and_set_bit(FFS_FL_BOUND, &ffs->flags)))
- return -EBADFD;
-
- first_id = usb_string_ids_n(cdev, ffs->strings_count);
- if (unlikely(first_id < 0))
- return first_id;
-
- ffs->ep0req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
- if (unlikely(!ffs->ep0req))
- return -ENOMEM;
- ffs->ep0req->complete = ffs_ep0_complete;
- ffs->ep0req->context = ffs;
-
- lang = ffs->stringtabs;
- for (lang = ffs->stringtabs; *lang; ++lang) {
- struct usb_string *str = (*lang)->strings;
- int id = first_id;
- for (; str->s; ++id, ++str)
- str->id = id;
- }
-
- ffs->gadget = cdev->gadget;
- ffs_data_get(ffs);
- return 0;
-}
-
-static void functionfs_unbind(struct ffs_data *ffs)
-{
- ENTER();
-
- if (!WARN_ON(!ffs->gadget)) {
- usb_ep_free_request(ffs->gadget->ep0, ffs->ep0req);
- ffs->ep0req = NULL;
- ffs->gadget = NULL;
- clear_bit(FFS_FL_BOUND, &ffs->flags);
- ffs_data_put(ffs);
- }
-}
-
-static int ffs_epfiles_create(struct ffs_data *ffs)
-{
- struct ffs_epfile *epfile, *epfiles;
- unsigned i, count;
-
- ENTER();
-
- count = ffs->eps_count;
- epfiles = kcalloc(count, sizeof(*epfiles), GFP_KERNEL);
- if (!epfiles)
- return -ENOMEM;
-
- epfile = epfiles;
- for (i = 1; i <= count; ++i, ++epfile) {
- epfile->ffs = ffs;
- mutex_init(&epfile->mutex);
- init_waitqueue_head(&epfile->wait);
- sprintf(epfiles->name, "ep%u", i);
- if (!unlikely(ffs_sb_create_file(ffs->sb, epfiles->name, epfile,
- &ffs_epfile_operations,
- &epfile->dentry))) {
- ffs_epfiles_destroy(epfiles, i - 1);
- return -ENOMEM;
- }
- }
-
- ffs->epfiles = epfiles;
- return 0;
-}
-
-static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count)
-{
- struct ffs_epfile *epfile = epfiles;
-
- ENTER();
-
- for (; count; --count, ++epfile) {
- BUG_ON(mutex_is_locked(&epfile->mutex) ||
- waitqueue_active(&epfile->wait));
- if (epfile->dentry) {
- d_delete(epfile->dentry);
- dput(epfile->dentry);
- epfile->dentry = NULL;
- }
- }
-
- kfree(epfiles);
-}
-
-
-static void ffs_func_eps_disable(struct ffs_function *func)
-{
- struct ffs_ep *ep = func->eps;
- struct ffs_epfile *epfile = func->ffs->epfiles;
- unsigned count = func->ffs->eps_count;
- unsigned long flags;
-
- spin_lock_irqsave(&func->ffs->eps_lock, flags);
- do {
- /* pending requests get nuked */
- if (likely(ep->ep))
- usb_ep_disable(ep->ep);
- epfile->ep = NULL;
-
- ++ep;
- ++epfile;
- } while (--count);
- spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
-}
-
-static int ffs_func_eps_enable(struct ffs_function *func)
-{
- struct ffs_data *ffs = func->ffs;
- struct ffs_ep *ep = func->eps;
- struct ffs_epfile *epfile = ffs->epfiles;
- unsigned count = ffs->eps_count;
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&func->ffs->eps_lock, flags);
- do {
- struct usb_endpoint_descriptor *ds;
- int desc_idx;
-
- if (ffs->gadget->speed == USB_SPEED_SUPER)
- desc_idx = 2;
- else if (ffs->gadget->speed == USB_SPEED_HIGH)
- desc_idx = 1;
- else
- desc_idx = 0;
-
- /* fall-back to lower speed if desc missing for current speed */
- do {
- ds = ep->descs[desc_idx];
- } while (!ds && --desc_idx >= 0);
-
- if (!ds) {
- ret = -EINVAL;
- break;
- }
-
- ep->ep->driver_data = ep;
- ep->ep->desc = ds;
- ret = usb_ep_enable(ep->ep);
- if (likely(!ret)) {
- epfile->ep = ep;
- epfile->in = usb_endpoint_dir_in(ds);
- epfile->isoc = usb_endpoint_xfer_isoc(ds);
- } else {
- break;
- }
-
- wake_up(&epfile->wait);
-
- ++ep;
- ++epfile;
- } while (--count);
- spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
-
- return ret;
-}
-
-
-/* Parsing and building descriptors and strings *****************************/
-
-/*
- * This validates if data pointed by data is a valid USB descriptor as
- * well as record how many interfaces, endpoints and strings are
- * required by given configuration. Returns address after the
- * descriptor or NULL if data is invalid.
- */
-
-enum ffs_entity_type {
- FFS_DESCRIPTOR, FFS_INTERFACE, FFS_STRING, FFS_ENDPOINT
-};
-
-enum ffs_os_desc_type {
- FFS_OS_DESC, FFS_OS_DESC_EXT_COMPAT, FFS_OS_DESC_EXT_PROP
-};
-
-typedef int (*ffs_entity_callback)(enum ffs_entity_type entity,
- u8 *valuep,
- struct usb_descriptor_header *desc,
- void *priv);
-
-typedef int (*ffs_os_desc_callback)(enum ffs_os_desc_type entity,
- struct usb_os_desc_header *h, void *data,
- unsigned len, void *priv);
-
-static int __must_check ffs_do_single_desc(char *data, unsigned len,
- ffs_entity_callback entity,
- void *priv)
-{
- struct usb_descriptor_header *_ds = (void *)data;
- u8 length;
- int ret;
-
- ENTER();
-
- /* At least two bytes are required: length and type */
- if (len < 2) {
- pr_vdebug("descriptor too short\n");
- return -EINVAL;
- }
-
- /* If we have at least as many bytes as the descriptor takes? */
- length = _ds->bLength;
- if (len < length) {
- pr_vdebug("descriptor longer then available data\n");
- return -EINVAL;
- }
-
-#define __entity_check_INTERFACE(val) 1
-#define __entity_check_STRING(val) (val)
-#define __entity_check_ENDPOINT(val) ((val) & USB_ENDPOINT_NUMBER_MASK)
-#define __entity(type, val) do { \
- pr_vdebug("entity " #type "(%02x)\n", (val)); \
- if (unlikely(!__entity_check_ ##type(val))) { \
- pr_vdebug("invalid entity's value\n"); \
- return -EINVAL; \
- } \
- ret = entity(FFS_ ##type, &val, _ds, priv); \
- if (unlikely(ret < 0)) { \
- pr_debug("entity " #type "(%02x); ret = %d\n", \
- (val), ret); \
- return ret; \
- } \
- } while (0)
-
- /* Parse descriptor depending on type. */
- switch (_ds->bDescriptorType) {
- case USB_DT_DEVICE:
- case USB_DT_CONFIG:
- case USB_DT_STRING:
- case USB_DT_DEVICE_QUALIFIER:
- /* function can't have any of those */
- pr_vdebug("descriptor reserved for gadget: %d\n",
- _ds->bDescriptorType);
- return -EINVAL;
-
- case USB_DT_INTERFACE: {
- struct usb_interface_descriptor *ds = (void *)_ds;
- pr_vdebug("interface descriptor\n");
- if (length != sizeof *ds)
- goto inv_length;
-
- __entity(INTERFACE, ds->bInterfaceNumber);
- if (ds->iInterface)
- __entity(STRING, ds->iInterface);
- }
- break;
-
- case USB_DT_ENDPOINT: {
- struct usb_endpoint_descriptor *ds = (void *)_ds;
- pr_vdebug("endpoint descriptor\n");
- if (length != USB_DT_ENDPOINT_SIZE &&
- length != USB_DT_ENDPOINT_AUDIO_SIZE)
- goto inv_length;
- __entity(ENDPOINT, ds->bEndpointAddress);
- }
- break;
-
- case HID_DT_HID:
- pr_vdebug("hid descriptor\n");
- if (length != sizeof(struct hid_descriptor))
- goto inv_length;
- break;
-
- case USB_DT_OTG:
- if (length != sizeof(struct usb_otg_descriptor))
- goto inv_length;
- break;
-
- case USB_DT_INTERFACE_ASSOCIATION: {
- struct usb_interface_assoc_descriptor *ds = (void *)_ds;
- pr_vdebug("interface association descriptor\n");
- if (length != sizeof *ds)
- goto inv_length;
- if (ds->iFunction)
- __entity(STRING, ds->iFunction);
- }
- break;
-
- case USB_DT_SS_ENDPOINT_COMP:
- pr_vdebug("EP SS companion descriptor\n");
- if (length != sizeof(struct usb_ss_ep_comp_descriptor))
- goto inv_length;
- break;
-
- case USB_DT_OTHER_SPEED_CONFIG:
- case USB_DT_INTERFACE_POWER:
- case USB_DT_DEBUG:
- case USB_DT_SECURITY:
- case USB_DT_CS_RADIO_CONTROL:
- /* TODO */
- pr_vdebug("unimplemented descriptor: %d\n", _ds->bDescriptorType);
- return -EINVAL;
-
- default:
- /* We should never be here */
- pr_vdebug("unknown descriptor: %d\n", _ds->bDescriptorType);
- return -EINVAL;
-
-inv_length:
- pr_vdebug("invalid length: %d (descriptor %d)\n",
- _ds->bLength, _ds->bDescriptorType);
- return -EINVAL;
- }
-
-#undef __entity
-#undef __entity_check_DESCRIPTOR
-#undef __entity_check_INTERFACE
-#undef __entity_check_STRING
-#undef __entity_check_ENDPOINT
-
- return length;
-}
-
-static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
- ffs_entity_callback entity, void *priv)
-{
- const unsigned _len = len;
- unsigned long num = 0;
-
- ENTER();
-
- for (;;) {
- int ret;
-
- if (num == count)
- data = NULL;
-
- /* Record "descriptor" entity */
- ret = entity(FFS_DESCRIPTOR, (u8 *)num, (void *)data, priv);
- if (unlikely(ret < 0)) {
- pr_debug("entity DESCRIPTOR(%02lx); ret = %d\n",
- num, ret);
- return ret;
- }
-
- if (!data)
- return _len - len;
-
- ret = ffs_do_single_desc(data, len, entity, priv);
- if (unlikely(ret < 0)) {
- pr_debug("%s returns %d\n", __func__, ret);
- return ret;
- }
-
- len -= ret;
- data += ret;
- ++num;
- }
-}
-
-static int __ffs_data_do_entity(enum ffs_entity_type type,
- u8 *valuep, struct usb_descriptor_header *desc,
- void *priv)
-{
- struct ffs_data *ffs = priv;
-
- ENTER();
-
- switch (type) {
- case FFS_DESCRIPTOR:
- break;
-
- case FFS_INTERFACE:
- /*
- * Interfaces are indexed from zero so if we
- * encountered interface "n" then there are at least
- * "n+1" interfaces.
- */
- if (*valuep >= ffs->interfaces_count)
- ffs->interfaces_count = *valuep + 1;
- break;
-
- case FFS_STRING:
- /*
- * Strings are indexed from 1 (0 is magic ;) reserved
- * for languages list or some such)
- */
- if (*valuep > ffs->strings_count)
- ffs->strings_count = *valuep;
- break;
-
- case FFS_ENDPOINT:
- /* Endpoints are indexed from 1 as well. */
- if ((*valuep & USB_ENDPOINT_NUMBER_MASK) > ffs->eps_count)
- ffs->eps_count = (*valuep & USB_ENDPOINT_NUMBER_MASK);
- break;
- }
-
- return 0;
-}
-
-static int __ffs_do_os_desc_header(enum ffs_os_desc_type *next_type,
- struct usb_os_desc_header *desc)
-{
- u16 bcd_version = le16_to_cpu(desc->bcdVersion);
- u16 w_index = le16_to_cpu(desc->wIndex);
-
- if (bcd_version != 1) {
- pr_vdebug("unsupported os descriptors version: %d",
- bcd_version);
- return -EINVAL;
- }
- switch (w_index) {
- case 0x4:
- *next_type = FFS_OS_DESC_EXT_COMPAT;
- break;
- case 0x5:
- *next_type = FFS_OS_DESC_EXT_PROP;
- break;
- default:
- pr_vdebug("unsupported os descriptor type: %d", w_index);
- return -EINVAL;
- }
-
- return sizeof(*desc);
-}
-
-/*
- * Process all extended compatibility/extended property descriptors
- * of a feature descriptor
- */
-static int __must_check ffs_do_single_os_desc(char *data, unsigned len,
- enum ffs_os_desc_type type,
- u16 feature_count,
- ffs_os_desc_callback entity,
- void *priv,
- struct usb_os_desc_header *h)
-{
- int ret;
- const unsigned _len = len;
-
- ENTER();
-
- /* loop over all ext compat/ext prop descriptors */
- while (feature_count--) {
- ret = entity(type, h, data, len, priv);
- if (unlikely(ret < 0)) {
- pr_debug("bad OS descriptor, type: %d\n", type);
- return ret;
- }
- data += ret;
- len -= ret;
- }
- return _len - len;
-}
-
-/* Process a number of complete Feature Descriptors (Ext Compat or Ext Prop) */
-static int __must_check ffs_do_os_descs(unsigned count,
- char *data, unsigned len,
- ffs_os_desc_callback entity, void *priv)
-{
- const unsigned _len = len;
- unsigned long num = 0;
-
- ENTER();
-
- for (num = 0; num < count; ++num) {
- int ret;
- enum ffs_os_desc_type type;
- u16 feature_count;
- struct usb_os_desc_header *desc = (void *)data;
-
- if (len < sizeof(*desc))
- return -EINVAL;
-
- /*
- * Record "descriptor" entity.
- * Process dwLength, bcdVersion, wIndex, get b/wCount.
- * Move the data pointer to the beginning of extended
- * compatibilities proper or extended properties proper
- * portions of the data
- */
- if (le32_to_cpu(desc->dwLength) > len)
- return -EINVAL;
-
- ret = __ffs_do_os_desc_header(&type, desc);
- if (unlikely(ret < 0)) {
- pr_debug("entity OS_DESCRIPTOR(%02lx); ret = %d\n",
- num, ret);
- return ret;
- }
- /*
- * 16-bit hex "?? 00" Little Endian looks like 8-bit hex "??"
- */
- feature_count = le16_to_cpu(desc->wCount);
- if (type == FFS_OS_DESC_EXT_COMPAT &&
- (feature_count > 255 || desc->Reserved))
- return -EINVAL;
- len -= ret;
- data += ret;
-
- /*
- * Process all function/property descriptors
- * of this Feature Descriptor
- */
- ret = ffs_do_single_os_desc(data, len, type,
- feature_count, entity, priv, desc);
- if (unlikely(ret < 0)) {
- pr_debug("%s returns %d\n", __func__, ret);
- return ret;
- }
-
- len -= ret;
- data += ret;
- }
- return _len - len;
-}
-
-/**
- * Validate contents of the buffer from userspace related to OS descriptors.
- */
-static int __ffs_data_do_os_desc(enum ffs_os_desc_type type,
- struct usb_os_desc_header *h, void *data,
- unsigned len, void *priv)
-{
- struct ffs_data *ffs = priv;
- u8 length;
-
- ENTER();
-
- switch (type) {
- case FFS_OS_DESC_EXT_COMPAT: {
- struct usb_ext_compat_desc *d = data;
- int i;
-
- if (len < sizeof(*d) ||
- d->bFirstInterfaceNumber >= ffs->interfaces_count ||
- d->Reserved1)
- return -EINVAL;
- for (i = 0; i < ARRAY_SIZE(d->Reserved2); ++i)
- if (d->Reserved2[i])
- return -EINVAL;
-
- length = sizeof(struct usb_ext_compat_desc);
- }
- break;
- case FFS_OS_DESC_EXT_PROP: {
- struct usb_ext_prop_desc *d = data;
- u32 type, pdl;
- u16 pnl;
-
- if (len < sizeof(*d) || h->interface >= ffs->interfaces_count)
- return -EINVAL;
- length = le32_to_cpu(d->dwSize);
- type = le32_to_cpu(d->dwPropertyDataType);
- if (type < USB_EXT_PROP_UNICODE ||
- type > USB_EXT_PROP_UNICODE_MULTI) {
- pr_vdebug("unsupported os descriptor property type: %d",
- type);
- return -EINVAL;
- }
- pnl = le16_to_cpu(d->wPropertyNameLength);
- pdl = le32_to_cpu(*(u32 *)((u8 *)data + 10 + pnl));
- if (length != 14 + pnl + pdl) {
- pr_vdebug("invalid os descriptor length: %d pnl:%d pdl:%d (descriptor %d)\n",
- length, pnl, pdl, type);
- return -EINVAL;
- }
- ++ffs->ms_os_descs_ext_prop_count;
- /* property name reported to the host as "WCHAR"s */
- ffs->ms_os_descs_ext_prop_name_len += pnl * 2;
- ffs->ms_os_descs_ext_prop_data_len += pdl;
- }
- break;
- default:
- pr_vdebug("unknown descriptor: %d\n", type);
- return -EINVAL;
- }
- return length;
-}
-
-static int __ffs_data_got_descs(struct ffs_data *ffs,
- char *const _data, size_t len)
-{
- char *data = _data, *raw_descs;
- unsigned os_descs_count = 0, counts[3], flags;
- int ret = -EINVAL, i;
-
- ENTER();
-
- if (get_unaligned_le32(data + 4) != len)
- goto error;
-
- switch (get_unaligned_le32(data)) {
- case FUNCTIONFS_DESCRIPTORS_MAGIC:
- flags = FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC;
- data += 8;
- len -= 8;
- break;
- case FUNCTIONFS_DESCRIPTORS_MAGIC_V2:
- flags = get_unaligned_le32(data + 8);
- if (flags & ~(FUNCTIONFS_HAS_FS_DESC |
- FUNCTIONFS_HAS_HS_DESC |
- FUNCTIONFS_HAS_SS_DESC |
- FUNCTIONFS_HAS_MS_OS_DESC)) {
- ret = -ENOSYS;
- goto error;
- }
- data += 12;
- len -= 12;
- break;
- default:
- goto error;
- }
-
- /* Read fs_count, hs_count and ss_count (if present) */
- for (i = 0; i < 3; ++i) {
- if (!(flags & (1 << i))) {
- counts[i] = 0;
- } else if (len < 4) {
- goto error;
- } else {
- counts[i] = get_unaligned_le32(data);
- data += 4;
- len -= 4;
- }
- }
- if (flags & (1 << i)) {
- os_descs_count = get_unaligned_le32(data);
- data += 4;
- len -= 4;
- };
-
- /* Read descriptors */
- raw_descs = data;
- for (i = 0; i < 3; ++i) {
- if (!counts[i])
- continue;
- ret = ffs_do_descs(counts[i], data, len,
- __ffs_data_do_entity, ffs);
- if (ret < 0)
- goto error;
- data += ret;
- len -= ret;
- }
- if (os_descs_count) {
- ret = ffs_do_os_descs(os_descs_count, data, len,
- __ffs_data_do_os_desc, ffs);
- if (ret < 0)
- goto error;
- data += ret;
- len -= ret;
- }
-
- if (raw_descs == data || len) {
- ret = -EINVAL;
- goto error;
- }
-
- ffs->raw_descs_data = _data;
- ffs->raw_descs = raw_descs;
- ffs->raw_descs_length = data - raw_descs;
- ffs->fs_descs_count = counts[0];
- ffs->hs_descs_count = counts[1];
- ffs->ss_descs_count = counts[2];
- ffs->ms_os_descs_count = os_descs_count;
-
- return 0;
-
-error:
- kfree(_data);
- return ret;
-}
-
-static int __ffs_data_got_strings(struct ffs_data *ffs,
- char *const _data, size_t len)
-{
- u32 str_count, needed_count, lang_count;
- struct usb_gadget_strings **stringtabs, *t;
- struct usb_string *strings, *s;
- const char *data = _data;
-
- ENTER();
-
- if (unlikely(get_unaligned_le32(data) != FUNCTIONFS_STRINGS_MAGIC ||
- get_unaligned_le32(data + 4) != len))
- goto error;
- str_count = get_unaligned_le32(data + 8);
- lang_count = get_unaligned_le32(data + 12);
-
- /* if one is zero the other must be zero */
- if (unlikely(!str_count != !lang_count))
- goto error;
-
- /* Do we have at least as many strings as descriptors need? */
- needed_count = ffs->strings_count;
- if (unlikely(str_count < needed_count))
- goto error;
-
- /*
- * If we don't need any strings just return and free all
- * memory.
- */
- if (!needed_count) {
- kfree(_data);
- return 0;
- }
-
- /* Allocate everything in one chunk so there's less maintenance. */
- {
- unsigned i = 0;
- vla_group(d);
- vla_item(d, struct usb_gadget_strings *, stringtabs,
- lang_count + 1);
- vla_item(d, struct usb_gadget_strings, stringtab, lang_count);
- vla_item(d, struct usb_string, strings,
- lang_count*(needed_count+1));
-
- char *vlabuf = kmalloc(vla_group_size(d), GFP_KERNEL);
-
- if (unlikely(!vlabuf)) {
- kfree(_data);
- return -ENOMEM;
- }
-
- /* Initialize the VLA pointers */
- stringtabs = vla_ptr(vlabuf, d, stringtabs);
- t = vla_ptr(vlabuf, d, stringtab);
- i = lang_count;
- do {
- *stringtabs++ = t++;
- } while (--i);
- *stringtabs = NULL;
-
- /* stringtabs = vlabuf = d_stringtabs for later kfree */
- stringtabs = vla_ptr(vlabuf, d, stringtabs);
- t = vla_ptr(vlabuf, d, stringtab);
- s = vla_ptr(vlabuf, d, strings);
- strings = s;
- }
-
- /* For each language */
- data += 16;
- len -= 16;
-
- do { /* lang_count > 0 so we can use do-while */
- unsigned needed = needed_count;
-
- if (unlikely(len < 3))
- goto error_free;
- t->language = get_unaligned_le16(data);
- t->strings = s;
- ++t;
-
- data += 2;
- len -= 2;
-
- /* For each string */
- do { /* str_count > 0 so we can use do-while */
- size_t length = strnlen(data, len);
-
- if (unlikely(length == len))
- goto error_free;
-
- /*
- * User may provide more strings then we need,
- * if that's the case we simply ignore the
- * rest
- */
- if (likely(needed)) {
- /*
- * s->id will be set while adding
- * function to configuration so for
- * now just leave garbage here.
- */
- s->s = data;
- --needed;
- ++s;
- }
-
- data += length + 1;
- len -= length + 1;
- } while (--str_count);
-
- s->id = 0; /* terminator */
- s->s = NULL;
- ++s;
-
- } while (--lang_count);
-
- /* Some garbage left? */
- if (unlikely(len))
- goto error_free;
-
- /* Done! */
- ffs->stringtabs = stringtabs;
- ffs->raw_strings = _data;
-
- return 0;
-
-error_free:
- kfree(stringtabs);
-error:
- kfree(_data);
- return -EINVAL;
-}
-
-
-/* Events handling and management *******************************************/
-
-static void __ffs_event_add(struct ffs_data *ffs,
- enum usb_functionfs_event_type type)
-{
- enum usb_functionfs_event_type rem_type1, rem_type2 = type;
- int neg = 0;
-
- /*
- * Abort any unhandled setup
- *
- * We do not need to worry about some cmpxchg() changing value
- * of ffs->setup_state without holding the lock because when
- * state is FFS_SETUP_PENDING cmpxchg() in several places in
- * the source does nothing.
- */
- if (ffs->setup_state == FFS_SETUP_PENDING)
- ffs->setup_state = FFS_SETUP_CANCELLED;
-
- switch (type) {
- case FUNCTIONFS_RESUME:
- rem_type2 = FUNCTIONFS_SUSPEND;
- /* FALL THROUGH */
- case FUNCTIONFS_SUSPEND:
- case FUNCTIONFS_SETUP:
- rem_type1 = type;
- /* Discard all similar events */
- break;
-
- case FUNCTIONFS_BIND:
- case FUNCTIONFS_UNBIND:
- case FUNCTIONFS_DISABLE:
- case FUNCTIONFS_ENABLE:
- /* Discard everything other then power management. */
- rem_type1 = FUNCTIONFS_SUSPEND;
- rem_type2 = FUNCTIONFS_RESUME;
- neg = 1;
- break;
-
- default:
- BUG();
- }
-
- {
- u8 *ev = ffs->ev.types, *out = ev;
- unsigned n = ffs->ev.count;
- for (; n; --n, ++ev)
- if ((*ev == rem_type1 || *ev == rem_type2) == neg)
- *out++ = *ev;
- else
- pr_vdebug("purging event %d\n", *ev);
- ffs->ev.count = out - ffs->ev.types;
- }
-
- pr_vdebug("adding event %d\n", type);
- ffs->ev.types[ffs->ev.count++] = type;
- wake_up_locked(&ffs->ev.waitq);
-}
-
-static void ffs_event_add(struct ffs_data *ffs,
- enum usb_functionfs_event_type type)
-{
- unsigned long flags;
- spin_lock_irqsave(&ffs->ev.waitq.lock, flags);
- __ffs_event_add(ffs, type);
- spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
-}
-
-
-/* Bind/unbind USB function hooks *******************************************/
-
-static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
- struct usb_descriptor_header *desc,
- void *priv)
-{
- struct usb_endpoint_descriptor *ds = (void *)desc;
- struct ffs_function *func = priv;
- struct ffs_ep *ffs_ep;
- unsigned ep_desc_id, idx;
- static const char *speed_names[] = { "full", "high", "super" };
-
- if (type != FFS_DESCRIPTOR)
- return 0;
-
- /*
- * If ss_descriptors is not NULL, we are reading super speed
- * descriptors; if hs_descriptors is not NULL, we are reading high
- * speed descriptors; otherwise, we are reading full speed
- * descriptors.
- */
- if (func->function.ss_descriptors) {
- ep_desc_id = 2;
- func->function.ss_descriptors[(long)valuep] = desc;
- } else if (func->function.hs_descriptors) {
- ep_desc_id = 1;
- func->function.hs_descriptors[(long)valuep] = desc;
- } else {
- ep_desc_id = 0;
- func->function.fs_descriptors[(long)valuep] = desc;
- }
-
- if (!desc || desc->bDescriptorType != USB_DT_ENDPOINT)
- return 0;
-
- idx = (ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) - 1;
- ffs_ep = func->eps + idx;
-
- if (unlikely(ffs_ep->descs[ep_desc_id])) {
- pr_err("two %sspeed descriptors for EP %d\n",
- speed_names[ep_desc_id],
- ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
- return -EINVAL;
- }
- ffs_ep->descs[ep_desc_id] = ds;
-
- ffs_dump_mem(": Original ep desc", ds, ds->bLength);
- if (ffs_ep->ep) {
- ds->bEndpointAddress = ffs_ep->descs[0]->bEndpointAddress;
- if (!ds->wMaxPacketSize)
- ds->wMaxPacketSize = ffs_ep->descs[0]->wMaxPacketSize;
- } else {
- struct usb_request *req;
- struct usb_ep *ep;
-
- pr_vdebug("autoconfig\n");
- ep = usb_ep_autoconfig(func->gadget, ds);
- if (unlikely(!ep))
- return -ENOTSUPP;
- ep->driver_data = func->eps + idx;
-
- req = usb_ep_alloc_request(ep, GFP_KERNEL);
- if (unlikely(!req))
- return -ENOMEM;
-
- ffs_ep->ep = ep;
- ffs_ep->req = req;
- func->eps_revmap[ds->bEndpointAddress &
- USB_ENDPOINT_NUMBER_MASK] = idx + 1;
- }
- ffs_dump_mem(": Rewritten ep desc", ds, ds->bLength);
-
- return 0;
-}
-
-static int __ffs_func_bind_do_nums(enum ffs_entity_type type, u8 *valuep,
- struct usb_descriptor_header *desc,
- void *priv)
-{
- struct ffs_function *func = priv;
- unsigned idx;
- u8 newValue;
-
- switch (type) {
- default:
- case FFS_DESCRIPTOR:
- /* Handled in previous pass by __ffs_func_bind_do_descs() */
- return 0;
-
- case FFS_INTERFACE:
- idx = *valuep;
- if (func->interfaces_nums[idx] < 0) {
- int id = usb_interface_id(func->conf, &func->function);
- if (unlikely(id < 0))
- return id;
- func->interfaces_nums[idx] = id;
- }
- newValue = func->interfaces_nums[idx];
- break;
-
- case FFS_STRING:
- /* String' IDs are allocated when fsf_data is bound to cdev */
- newValue = func->ffs->stringtabs[0]->strings[*valuep - 1].id;
- break;
-
- case FFS_ENDPOINT:
- /*
- * USB_DT_ENDPOINT are handled in
- * __ffs_func_bind_do_descs().
- */
- if (desc->bDescriptorType == USB_DT_ENDPOINT)
- return 0;
-
- idx = (*valuep & USB_ENDPOINT_NUMBER_MASK) - 1;
- if (unlikely(!func->eps[idx].ep))
- return -EINVAL;
-
- {
- struct usb_endpoint_descriptor **descs;
- descs = func->eps[idx].descs;
- newValue = descs[descs[0] ? 0 : 1]->bEndpointAddress;
- }
- break;
- }
-
- pr_vdebug("%02x -> %02x\n", *valuep, newValue);
- *valuep = newValue;
- return 0;
-}
-
-static int __ffs_func_bind_do_os_desc(enum ffs_os_desc_type type,
- struct usb_os_desc_header *h, void *data,
- unsigned len, void *priv)
-{
- struct ffs_function *func = priv;
- u8 length = 0;
-
- switch (type) {
- case FFS_OS_DESC_EXT_COMPAT: {
- struct usb_ext_compat_desc *desc = data;
- struct usb_os_desc_table *t;
-
- t = &func->function.os_desc_table[desc->bFirstInterfaceNumber];
- t->if_id = func->interfaces_nums[desc->bFirstInterfaceNumber];
- memcpy(t->os_desc->ext_compat_id, &desc->CompatibleID,
- ARRAY_SIZE(desc->CompatibleID) +
- ARRAY_SIZE(desc->SubCompatibleID));
- length = sizeof(*desc);
- }
- break;
- case FFS_OS_DESC_EXT_PROP: {
- struct usb_ext_prop_desc *desc = data;
- struct usb_os_desc_table *t;
- struct usb_os_desc_ext_prop *ext_prop;
- char *ext_prop_name;
- char *ext_prop_data;
-
- t = &func->function.os_desc_table[h->interface];
- t->if_id = func->interfaces_nums[h->interface];
-
- ext_prop = func->ffs->ms_os_descs_ext_prop_avail;
- func->ffs->ms_os_descs_ext_prop_avail += sizeof(*ext_prop);
-
- ext_prop->type = le32_to_cpu(desc->dwPropertyDataType);
- ext_prop->name_len = le16_to_cpu(desc->wPropertyNameLength);
- ext_prop->data_len = le32_to_cpu(*(u32 *)
- usb_ext_prop_data_len_ptr(data, ext_prop->name_len));
- length = ext_prop->name_len + ext_prop->data_len + 14;
-
- ext_prop_name = func->ffs->ms_os_descs_ext_prop_name_avail;
- func->ffs->ms_os_descs_ext_prop_name_avail +=
- ext_prop->name_len;
-
- ext_prop_data = func->ffs->ms_os_descs_ext_prop_data_avail;
- func->ffs->ms_os_descs_ext_prop_data_avail +=
- ext_prop->data_len;
- memcpy(ext_prop_data,
- usb_ext_prop_data_ptr(data, ext_prop->name_len),
- ext_prop->data_len);
- /* unicode data reported to the host as "WCHAR"s */
- switch (ext_prop->type) {
- case USB_EXT_PROP_UNICODE:
- case USB_EXT_PROP_UNICODE_ENV:
- case USB_EXT_PROP_UNICODE_LINK:
- case USB_EXT_PROP_UNICODE_MULTI:
- ext_prop->data_len *= 2;
- break;
- }
- ext_prop->data = ext_prop_data;
-
- memcpy(ext_prop_name, usb_ext_prop_name_ptr(data),
- ext_prop->name_len);
- /* property name reported to the host as "WCHAR"s */
- ext_prop->name_len *= 2;
- ext_prop->name = ext_prop_name;
-
- t->os_desc->ext_prop_len +=
- ext_prop->name_len + ext_prop->data_len + 14;
- ++t->os_desc->ext_prop_count;
- list_add_tail(&ext_prop->entry, &t->os_desc->ext_prop);
- }
- break;
- default:
- pr_vdebug("unknown descriptor: %d\n", type);
- }
-
- return length;
-}
-
-static inline struct f_fs_opts *ffs_do_functionfs_bind(struct usb_function *f,
- struct usb_configuration *c)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct f_fs_opts *ffs_opts =
- container_of(f->fi, struct f_fs_opts, func_inst);
- int ret;
-
- ENTER();
-
- /*
- * Legacy gadget triggers binding in functionfs_ready_callback,
- * which already uses locking; taking the same lock here would
- * cause a deadlock.
- *
- * Configfs-enabled gadgets however do need ffs_dev_lock.
- */
- if (!ffs_opts->no_configfs)
- ffs_dev_lock();
- ret = ffs_opts->dev->desc_ready ? 0 : -ENODEV;
- func->ffs = ffs_opts->dev->ffs_data;
- if (!ffs_opts->no_configfs)
- ffs_dev_unlock();
- if (ret)
- return ERR_PTR(ret);
-
- func->conf = c;
- func->gadget = c->cdev->gadget;
-
- ffs_data_get(func->ffs);
-
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to ffs_opts->bound access
- */
- if (!ffs_opts->refcnt) {
- ret = functionfs_bind(func->ffs, c->cdev);
- if (ret)
- return ERR_PTR(ret);
- }
- ffs_opts->refcnt++;
- func->function.strings = func->ffs->stringtabs;
-
- return ffs_opts;
-}
-
-static int _ffs_func_bind(struct usb_configuration *c,
- struct usb_function *f)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
-
- const int full = !!func->ffs->fs_descs_count;
- const int high = gadget_is_dualspeed(func->gadget) &&
- func->ffs->hs_descs_count;
- const int super = gadget_is_superspeed(func->gadget) &&
- func->ffs->ss_descs_count;
-
- int fs_len, hs_len, ss_len, ret, i;
-
- /* Make it a single chunk, less management later on */
- vla_group(d);
- vla_item_with_sz(d, struct ffs_ep, eps, ffs->eps_count);
- vla_item_with_sz(d, struct usb_descriptor_header *, fs_descs,
- full ? ffs->fs_descs_count + 1 : 0);
- vla_item_with_sz(d, struct usb_descriptor_header *, hs_descs,
- high ? ffs->hs_descs_count + 1 : 0);
- vla_item_with_sz(d, struct usb_descriptor_header *, ss_descs,
- super ? ffs->ss_descs_count + 1 : 0);
- vla_item_with_sz(d, short, inums, ffs->interfaces_count);
- vla_item_with_sz(d, struct usb_os_desc_table, os_desc_table,
- c->cdev->use_os_string ? ffs->interfaces_count : 0);
- vla_item_with_sz(d, char[16], ext_compat,
- c->cdev->use_os_string ? ffs->interfaces_count : 0);
- vla_item_with_sz(d, struct usb_os_desc, os_desc,
- c->cdev->use_os_string ? ffs->interfaces_count : 0);
- vla_item_with_sz(d, struct usb_os_desc_ext_prop, ext_prop,
- ffs->ms_os_descs_ext_prop_count);
- vla_item_with_sz(d, char, ext_prop_name,
- ffs->ms_os_descs_ext_prop_name_len);
- vla_item_with_sz(d, char, ext_prop_data,
- ffs->ms_os_descs_ext_prop_data_len);
- vla_item_with_sz(d, char, raw_descs, ffs->raw_descs_length);
- char *vlabuf;
-
- ENTER();
-
- /* Has descriptors only for speeds gadget does not support */
- if (unlikely(!(full | high | super)))
- return -ENOTSUPP;
-
- /* Allocate a single chunk, less management later on */
- vlabuf = kzalloc(vla_group_size(d), GFP_KERNEL);
- if (unlikely(!vlabuf))
- return -ENOMEM;
-
- ffs->ms_os_descs_ext_prop_avail = vla_ptr(vlabuf, d, ext_prop);
- ffs->ms_os_descs_ext_prop_name_avail =
- vla_ptr(vlabuf, d, ext_prop_name);
- ffs->ms_os_descs_ext_prop_data_avail =
- vla_ptr(vlabuf, d, ext_prop_data);
-
- /* Copy descriptors */
- memcpy(vla_ptr(vlabuf, d, raw_descs), ffs->raw_descs,
- ffs->raw_descs_length);
-
- memset(vla_ptr(vlabuf, d, inums), 0xff, d_inums__sz);
- for (ret = ffs->eps_count; ret; --ret) {
- struct ffs_ep *ptr;
-
- ptr = vla_ptr(vlabuf, d, eps);
- ptr[ret].num = -1;
- }
-
- /* Save pointers
- * d_eps == vlabuf, func->eps used to kfree vlabuf later
- */
- func->eps = vla_ptr(vlabuf, d, eps);
- func->interfaces_nums = vla_ptr(vlabuf, d, inums);
-
- /*
- * Go through all the endpoint descriptors and allocate
- * endpoints first, so that later we can rewrite the endpoint
- * numbers without worrying that it may be described later on.
- */
- if (likely(full)) {
- func->function.fs_descriptors = vla_ptr(vlabuf, d, fs_descs);
- fs_len = ffs_do_descs(ffs->fs_descs_count,
- vla_ptr(vlabuf, d, raw_descs),
- d_raw_descs__sz,
- __ffs_func_bind_do_descs, func);
- if (unlikely(fs_len < 0)) {
- ret = fs_len;
- goto error;
- }
- } else {
- fs_len = 0;
- }
-
- if (likely(high)) {
- func->function.hs_descriptors = vla_ptr(vlabuf, d, hs_descs);
- hs_len = ffs_do_descs(ffs->hs_descs_count,
- vla_ptr(vlabuf, d, raw_descs) + fs_len,
- d_raw_descs__sz - fs_len,
- __ffs_func_bind_do_descs, func);
- if (unlikely(hs_len < 0)) {
- ret = hs_len;
- goto error;
- }
- } else {
- hs_len = 0;
- }
-
- if (likely(super)) {
- func->function.ss_descriptors = vla_ptr(vlabuf, d, ss_descs);
- ss_len = ffs_do_descs(ffs->ss_descs_count,
- vla_ptr(vlabuf, d, raw_descs) + fs_len + hs_len,
- d_raw_descs__sz - fs_len - hs_len,
- __ffs_func_bind_do_descs, func);
- if (unlikely(ss_len < 0)) {
- ret = ss_len;
- goto error;
- }
- } else {
- ss_len = 0;
- }
-
- /*
- * Now handle interface numbers allocation and interface and
- * endpoint numbers rewriting. We can do that in one go
- * now.
- */
- ret = ffs_do_descs(ffs->fs_descs_count +
- (high ? ffs->hs_descs_count : 0) +
- (super ? ffs->ss_descs_count : 0),
- vla_ptr(vlabuf, d, raw_descs), d_raw_descs__sz,
- __ffs_func_bind_do_nums, func);
- if (unlikely(ret < 0))
- goto error;
-
- func->function.os_desc_table = vla_ptr(vlabuf, d, os_desc_table);
- if (c->cdev->use_os_string)
- for (i = 0; i < ffs->interfaces_count; ++i) {
- struct usb_os_desc *desc;
-
- desc = func->function.os_desc_table[i].os_desc =
- vla_ptr(vlabuf, d, os_desc) +
- i * sizeof(struct usb_os_desc);
- desc->ext_compat_id =
- vla_ptr(vlabuf, d, ext_compat) + i * 16;
- INIT_LIST_HEAD(&desc->ext_prop);
- }
- ret = ffs_do_os_descs(ffs->ms_os_descs_count,
- vla_ptr(vlabuf, d, raw_descs) +
- fs_len + hs_len + ss_len,
- d_raw_descs__sz - fs_len - hs_len - ss_len,
- __ffs_func_bind_do_os_desc, func);
- if (unlikely(ret < 0))
- goto error;
- func->function.os_desc_n =
- c->cdev->use_os_string ? ffs->interfaces_count : 0;
-
- /* And we're done */
- ffs_event_add(ffs, FUNCTIONFS_BIND);
- return 0;
-
-error:
- /* XXX Do we need to release all claimed endpoints here? */
- return ret;
-}
-
-static int ffs_func_bind(struct usb_configuration *c,
- struct usb_function *f)
-{
- struct f_fs_opts *ffs_opts = ffs_do_functionfs_bind(f, c);
-
- if (IS_ERR(ffs_opts))
- return PTR_ERR(ffs_opts);
-
- return _ffs_func_bind(c, f);
-}
-
-
-/* Other USB function hooks *************************************************/
-
-static int ffs_func_set_alt(struct usb_function *f,
- unsigned interface, unsigned alt)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
- int ret = 0, intf;
-
- if (alt != (unsigned)-1) {
- intf = ffs_func_revmap_intf(func, interface);
- if (unlikely(intf < 0))
- return intf;
- }
-
- if (ffs->func)
- ffs_func_eps_disable(ffs->func);
-
- if (ffs->state != FFS_ACTIVE)
- return -ENODEV;
-
- if (alt == (unsigned)-1) {
- ffs->func = NULL;
- ffs_event_add(ffs, FUNCTIONFS_DISABLE);
- return 0;
- }
-
- ffs->func = func;
- ret = ffs_func_eps_enable(func);
- if (likely(ret >= 0))
- ffs_event_add(ffs, FUNCTIONFS_ENABLE);
- return ret;
-}
-
-static void ffs_func_disable(struct usb_function *f)
-{
- ffs_func_set_alt(f, 0, (unsigned)-1);
-}
-
-static int ffs_func_setup(struct usb_function *f,
- const struct usb_ctrlrequest *creq)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
- unsigned long flags;
- int ret;
-
- ENTER();
-
- pr_vdebug("creq->bRequestType = %02x\n", creq->bRequestType);
- pr_vdebug("creq->bRequest = %02x\n", creq->bRequest);
- pr_vdebug("creq->wValue = %04x\n", le16_to_cpu(creq->wValue));
- pr_vdebug("creq->wIndex = %04x\n", le16_to_cpu(creq->wIndex));
- pr_vdebug("creq->wLength = %04x\n", le16_to_cpu(creq->wLength));
-
- /*
- * Most requests directed to interface go through here
- * (notable exceptions are set/get interface) so we need to
- * handle them. All other either handled by composite or
- * passed to usb_configuration->setup() (if one is set). No
- * matter, we will handle requests directed to endpoint here
- * as well (as it's straightforward) but what to do with any
- * other request?
- */
- if (ffs->state != FFS_ACTIVE)
- return -ENODEV;
-
- switch (creq->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_INTERFACE:
- ret = ffs_func_revmap_intf(func, le16_to_cpu(creq->wIndex));
- if (unlikely(ret < 0))
- return ret;
- break;
-
- case USB_RECIP_ENDPOINT:
- ret = ffs_func_revmap_ep(func, le16_to_cpu(creq->wIndex));
- if (unlikely(ret < 0))
- return ret;
- break;
-
- default:
- return -EOPNOTSUPP;
- }
-
- spin_lock_irqsave(&ffs->ev.waitq.lock, flags);
- ffs->ev.setup = *creq;
- ffs->ev.setup.wIndex = cpu_to_le16(ret);
- __ffs_event_add(ffs, FUNCTIONFS_SETUP);
- spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
-
- return 0;
-}
-
-static void ffs_func_suspend(struct usb_function *f)
-{
- ENTER();
- ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_SUSPEND);
-}
-
-static void ffs_func_resume(struct usb_function *f)
-{
- ENTER();
- ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_RESUME);
-}
-
-
-/* Endpoint and interface numbers reverse mapping ***************************/
-
-static int ffs_func_revmap_ep(struct ffs_function *func, u8 num)
-{
- num = func->eps_revmap[num & USB_ENDPOINT_NUMBER_MASK];
- return num ? num : -EDOM;
-}
-
-static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf)
-{
- short *nums = func->interfaces_nums;
- unsigned count = func->ffs->interfaces_count;
-
- for (; count; --count, ++nums) {
- if (*nums >= 0 && *nums == intf)
- return nums - func->interfaces_nums;
- }
-
- return -EDOM;
-}
-
-
-/* Devices management *******************************************************/
-
-static LIST_HEAD(ffs_devices);
-
-static struct ffs_dev *_ffs_do_find_dev(const char *name)
-{
- struct ffs_dev *dev;
-
- list_for_each_entry(dev, &ffs_devices, entry) {
- if (!dev->name || !name)
- continue;
- if (strcmp(dev->name, name) == 0)
- return dev;
- }
-
- return NULL;
-}
-
-/*
- * ffs_lock must be taken by the caller of this function
- */
-static struct ffs_dev *_ffs_get_single_dev(void)
-{
- struct ffs_dev *dev;
-
- if (list_is_singular(&ffs_devices)) {
- dev = list_first_entry(&ffs_devices, struct ffs_dev, entry);
- if (dev->single)
- return dev;
- }
-
- return NULL;
-}
-
-/*
- * ffs_lock must be taken by the caller of this function
- */
-static struct ffs_dev *_ffs_find_dev(const char *name)
-{
- struct ffs_dev *dev;
-
- dev = _ffs_get_single_dev();
- if (dev)
- return dev;
-
- return _ffs_do_find_dev(name);
-}
-
-/* Configfs support *********************************************************/
-
-static inline struct f_fs_opts *to_ffs_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_fs_opts,
- func_inst.group);
-}
-
-static void ffs_attr_release(struct config_item *item)
-{
- struct f_fs_opts *opts = to_ffs_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations ffs_item_ops = {
- .release = ffs_attr_release,
-};
-
-static struct config_item_type ffs_func_type = {
- .ct_item_ops = &ffs_item_ops,
- .ct_owner = THIS_MODULE,
-};
-
-
-/* Function registration interface ******************************************/
-
-static void ffs_free_inst(struct usb_function_instance *f)
-{
- struct f_fs_opts *opts;
-
- opts = to_f_fs_opts(f);
- ffs_dev_lock();
- _ffs_free_dev(opts->dev);
- ffs_dev_unlock();
- kfree(opts);
-}
-
-#define MAX_INST_NAME_LEN 40
-
-static int ffs_set_inst_name(struct usb_function_instance *fi, const char *name)
-{
- struct f_fs_opts *opts;
- char *ptr;
- const char *tmp;
- int name_len, ret;
-
- name_len = strlen(name) + 1;
- if (name_len > MAX_INST_NAME_LEN)
- return -ENAMETOOLONG;
-
- ptr = kstrndup(name, name_len, GFP_KERNEL);
- if (!ptr)
- return -ENOMEM;
-
- opts = to_f_fs_opts(fi);
- tmp = NULL;
-
- ffs_dev_lock();
-
- tmp = opts->dev->name_allocated ? opts->dev->name : NULL;
- ret = _ffs_name_dev(opts->dev, ptr);
- if (ret) {
- kfree(ptr);
- ffs_dev_unlock();
- return ret;
- }
- opts->dev->name_allocated = true;
-
- ffs_dev_unlock();
-
- kfree(tmp);
-
- return 0;
-}
-
-static struct usb_function_instance *ffs_alloc_inst(void)
-{
- struct f_fs_opts *opts;
- struct ffs_dev *dev;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
-
- opts->func_inst.set_inst_name = ffs_set_inst_name;
- opts->func_inst.free_func_inst = ffs_free_inst;
- ffs_dev_lock();
- dev = _ffs_alloc_dev();
- ffs_dev_unlock();
- if (IS_ERR(dev)) {
- kfree(opts);
- return ERR_CAST(dev);
- }
- opts->dev = dev;
- dev->opts = opts;
-
- config_group_init_type_name(&opts->func_inst.group, "",
- &ffs_func_type);
- return &opts->func_inst;
-}
-
-static void ffs_free(struct usb_function *f)
-{
- kfree(ffs_func_from_usb(f));
-}
-
-static void ffs_func_unbind(struct usb_configuration *c,
- struct usb_function *f)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
- struct f_fs_opts *opts =
- container_of(f->fi, struct f_fs_opts, func_inst);
- struct ffs_ep *ep = func->eps;
- unsigned count = ffs->eps_count;
- unsigned long flags;
-
- ENTER();
- if (ffs->func == func) {
- ffs_func_eps_disable(func);
- ffs->func = NULL;
- }
-
- if (!--opts->refcnt)
- functionfs_unbind(ffs);
-
- /* cleanup after autoconfig */
- spin_lock_irqsave(&func->ffs->eps_lock, flags);
- do {
- if (ep->ep && ep->req)
- usb_ep_free_request(ep->ep, ep->req);
- ep->req = NULL;
- ++ep;
- } while (--count);
- spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
- kfree(func->eps);
- func->eps = NULL;
- /*
- * eps, descriptors and interfaces_nums are allocated in the
- * same chunk so only one free is required.
- */
- func->function.fs_descriptors = NULL;
- func->function.hs_descriptors = NULL;
- func->function.ss_descriptors = NULL;
- func->interfaces_nums = NULL;
-
- ffs_event_add(ffs, FUNCTIONFS_UNBIND);
-}
-
-static struct usb_function *ffs_alloc(struct usb_function_instance *fi)
-{
- struct ffs_function *func;
-
- ENTER();
-
- func = kzalloc(sizeof(*func), GFP_KERNEL);
- if (unlikely(!func))
- return ERR_PTR(-ENOMEM);
-
- func->function.name = "Function FS Gadget";
-
- func->function.bind = ffs_func_bind;
- func->function.unbind = ffs_func_unbind;
- func->function.set_alt = ffs_func_set_alt;
- func->function.disable = ffs_func_disable;
- func->function.setup = ffs_func_setup;
- func->function.suspend = ffs_func_suspend;
- func->function.resume = ffs_func_resume;
- func->function.free_func = ffs_free;
-
- return &func->function;
-}
-
-/*
- * ffs_lock must be taken by the caller of this function
- */
-static struct ffs_dev *_ffs_alloc_dev(void)
-{
- struct ffs_dev *dev;
- int ret;
-
- if (_ffs_get_single_dev())
- return ERR_PTR(-EBUSY);
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return ERR_PTR(-ENOMEM);
-
- if (list_empty(&ffs_devices)) {
- ret = functionfs_init();
- if (ret) {
- kfree(dev);
- return ERR_PTR(ret);
- }
- }
-
- list_add(&dev->entry, &ffs_devices);
-
- return dev;
-}
-
-/*
- * ffs_lock must be taken by the caller of this function
- * The caller is responsible for "name" being available whenever f_fs needs it
- */
-static int _ffs_name_dev(struct ffs_dev *dev, const char *name)
-{
- struct ffs_dev *existing;
-
- existing = _ffs_do_find_dev(name);
- if (existing)
- return -EBUSY;
-
- dev->name = name;
-
- return 0;
-}
-
-/*
- * The caller is responsible for "name" being available whenever f_fs needs it
- */
-int ffs_name_dev(struct ffs_dev *dev, const char *name)
-{
- int ret;
-
- ffs_dev_lock();
- ret = _ffs_name_dev(dev, name);
- ffs_dev_unlock();
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(ffs_name_dev);
-
-int ffs_single_dev(struct ffs_dev *dev)
-{
- int ret;
-
- ret = 0;
- ffs_dev_lock();
-
- if (!list_is_singular(&ffs_devices))
- ret = -EBUSY;
- else
- dev->single = true;
-
- ffs_dev_unlock();
- return ret;
-}
-EXPORT_SYMBOL_GPL(ffs_single_dev);
-
-/*
- * ffs_lock must be taken by the caller of this function
- */
-static void _ffs_free_dev(struct ffs_dev *dev)
-{
- list_del(&dev->entry);
- if (dev->name_allocated)
- kfree(dev->name);
- kfree(dev);
- if (list_empty(&ffs_devices))
- functionfs_cleanup();
-}
-
-static void *ffs_acquire_dev(const char *dev_name)
-{
- struct ffs_dev *ffs_dev;
-
- ENTER();
- ffs_dev_lock();
-
- ffs_dev = _ffs_find_dev(dev_name);
- if (!ffs_dev)
- ffs_dev = ERR_PTR(-ENOENT);
- else if (ffs_dev->mounted)
- ffs_dev = ERR_PTR(-EBUSY);
- else if (ffs_dev->ffs_acquire_dev_callback &&
- ffs_dev->ffs_acquire_dev_callback(ffs_dev))
- ffs_dev = ERR_PTR(-ENOENT);
- else
- ffs_dev->mounted = true;
-
- ffs_dev_unlock();
- return ffs_dev;
-}
-
-static void ffs_release_dev(struct ffs_data *ffs_data)
-{
- struct ffs_dev *ffs_dev;
-
- ENTER();
- ffs_dev_lock();
-
- ffs_dev = ffs_data->private_data;
- if (ffs_dev) {
- ffs_dev->mounted = false;
-
- if (ffs_dev->ffs_release_dev_callback)
- ffs_dev->ffs_release_dev_callback(ffs_dev);
- }
-
- ffs_dev_unlock();
-}
-
-static int ffs_ready(struct ffs_data *ffs)
-{
- struct ffs_dev *ffs_obj;
- int ret = 0;
-
- ENTER();
- ffs_dev_lock();
-
- ffs_obj = ffs->private_data;
- if (!ffs_obj) {
- ret = -EINVAL;
- goto done;
- }
- if (WARN_ON(ffs_obj->desc_ready)) {
- ret = -EBUSY;
- goto done;
- }
-
- ffs_obj->desc_ready = true;
- ffs_obj->ffs_data = ffs;
-
- if (ffs_obj->ffs_ready_callback)
- ret = ffs_obj->ffs_ready_callback(ffs);
-
-done:
- ffs_dev_unlock();
- return ret;
-}
-
-static void ffs_closed(struct ffs_data *ffs)
-{
- struct ffs_dev *ffs_obj;
-
- ENTER();
- ffs_dev_lock();
-
- ffs_obj = ffs->private_data;
- if (!ffs_obj)
- goto done;
-
- ffs_obj->desc_ready = false;
-
- if (ffs_obj->ffs_closed_callback)
- ffs_obj->ffs_closed_callback(ffs);
-
- if (!ffs_obj->opts || ffs_obj->opts->no_configfs
- || !ffs_obj->opts->func_inst.group.cg_item.ci_parent)
- goto done;
-
- unregister_gadget_item(ffs_obj->opts->
- func_inst.group.cg_item.ci_parent->ci_parent);
-done:
- ffs_dev_unlock();
-}
-
-/* Misc helper functions ****************************************************/
-
-static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
-{
- return nonblock
- ? likely(mutex_trylock(mutex)) ? 0 : -EAGAIN
- : mutex_lock_interruptible(mutex);
-}
-
-static char *ffs_prepare_buffer(const char __user *buf, size_t len)
-{
- char *data;
-
- if (unlikely(!len))
- return NULL;
-
- data = kmalloc(len, GFP_KERNEL);
- if (unlikely(!data))
- return ERR_PTR(-ENOMEM);
-
- if (unlikely(__copy_from_user(data, buf, len))) {
- kfree(data);
- return ERR_PTR(-EFAULT);
- }
-
- pr_vdebug("Buffer from user space:\n");
- ffs_dump_mem("", data, len);
-
- return data;
-}
-
-DECLARE_USB_FUNCTION_INIT(ffs, ffs_alloc_inst, ffs_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Michal Nazarewicz");
+++ /dev/null
-/*
- * f_hid.c -- USB HID function driver
- *
- * Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@barco.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/hid.h>
-#include <linux/cdev.h>
-#include <linux/mutex.h>
-#include <linux/poll.h>
-#include <linux/uaccess.h>
-#include <linux/wait.h>
-#include <linux/sched.h>
-#include <linux/usb/g_hid.h>
-
-#include "u_f.h"
-
-static int major, minors;
-static struct class *hidg_class;
-
-/*-------------------------------------------------------------------------*/
-/* HID gadget struct */
-
-struct f_hidg_req_list {
- struct usb_request *req;
- unsigned int pos;
- struct list_head list;
-};
-
-struct f_hidg {
- /* configuration */
- unsigned char bInterfaceSubClass;
- unsigned char bInterfaceProtocol;
- unsigned short report_desc_length;
- char *report_desc;
- unsigned short report_length;
-
- /* recv report */
- struct list_head completed_out_req;
- spinlock_t spinlock;
- wait_queue_head_t read_queue;
- unsigned int qlen;
-
- /* send report */
- struct mutex lock;
- bool write_pending;
- wait_queue_head_t write_queue;
- struct usb_request *req;
-
- int minor;
- struct cdev cdev;
- struct usb_function func;
-
- struct usb_ep *in_ep;
- struct usb_ep *out_ep;
-};
-
-static inline struct f_hidg *func_to_hidg(struct usb_function *f)
-{
- return container_of(f, struct f_hidg, func);
-}
-
-/*-------------------------------------------------------------------------*/
-/* Static descriptors */
-
-static struct usb_interface_descriptor hidg_interface_desc = {
- .bLength = sizeof hidg_interface_desc,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bAlternateSetting = 0,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_HID,
- /* .bInterfaceSubClass = DYNAMIC */
- /* .bInterfaceProtocol = DYNAMIC */
- /* .iInterface = DYNAMIC */
-};
-
-static struct hid_descriptor hidg_desc = {
- .bLength = sizeof hidg_desc,
- .bDescriptorType = HID_DT_HID,
- .bcdHID = 0x0101,
- .bCountryCode = 0x00,
- .bNumDescriptors = 0x1,
- /*.desc[0].bDescriptorType = DYNAMIC */
- /*.desc[0].wDescriptorLenght = DYNAMIC */
-};
-
-/* High-Speed Support */
-
-static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- /*.wMaxPacketSize = DYNAMIC */
- .bInterval = 4, /* FIXME: Add this field in the
- * HID gadget configuration?
- * (struct hidg_func_descriptor)
- */
-};
-
-static struct usb_endpoint_descriptor hidg_hs_out_ep_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- /*.wMaxPacketSize = DYNAMIC */
- .bInterval = 4, /* FIXME: Add this field in the
- * HID gadget configuration?
- * (struct hidg_func_descriptor)
- */
-};
-
-static struct usb_descriptor_header *hidg_hs_descriptors[] = {
- (struct usb_descriptor_header *)&hidg_interface_desc,
- (struct usb_descriptor_header *)&hidg_desc,
- (struct usb_descriptor_header *)&hidg_hs_in_ep_desc,
- (struct usb_descriptor_header *)&hidg_hs_out_ep_desc,
- NULL,
-};
-
-/* Full-Speed Support */
-
-static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- /*.wMaxPacketSize = DYNAMIC */
- .bInterval = 10, /* FIXME: Add this field in the
- * HID gadget configuration?
- * (struct hidg_func_descriptor)
- */
-};
-
-static struct usb_endpoint_descriptor hidg_fs_out_ep_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- /*.wMaxPacketSize = DYNAMIC */
- .bInterval = 10, /* FIXME: Add this field in the
- * HID gadget configuration?
- * (struct hidg_func_descriptor)
- */
-};
-
-static struct usb_descriptor_header *hidg_fs_descriptors[] = {
- (struct usb_descriptor_header *)&hidg_interface_desc,
- (struct usb_descriptor_header *)&hidg_desc,
- (struct usb_descriptor_header *)&hidg_fs_in_ep_desc,
- (struct usb_descriptor_header *)&hidg_fs_out_ep_desc,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-/* Char Device */
-
-static ssize_t f_hidg_read(struct file *file, char __user *buffer,
- size_t count, loff_t *ptr)
-{
- struct f_hidg *hidg = file->private_data;
- struct f_hidg_req_list *list;
- struct usb_request *req;
- unsigned long flags;
- int ret;
-
- if (!count)
- return 0;
-
- if (!access_ok(VERIFY_WRITE, buffer, count))
- return -EFAULT;
-
- spin_lock_irqsave(&hidg->spinlock, flags);
-
-#define READ_COND (!list_empty(&hidg->completed_out_req))
-
- /* wait for at least one buffer to complete */
- while (!READ_COND) {
- spin_unlock_irqrestore(&hidg->spinlock, flags);
- if (file->f_flags & O_NONBLOCK)
- return -EAGAIN;
-
- if (wait_event_interruptible(hidg->read_queue, READ_COND))
- return -ERESTARTSYS;
-
- spin_lock_irqsave(&hidg->spinlock, flags);
- }
-
- /* pick the first one */
- list = list_first_entry(&hidg->completed_out_req,
- struct f_hidg_req_list, list);
- req = list->req;
- count = min_t(unsigned int, count, req->actual - list->pos);
- spin_unlock_irqrestore(&hidg->spinlock, flags);
-
- /* copy to user outside spinlock */
- count -= copy_to_user(buffer, req->buf + list->pos, count);
- list->pos += count;
-
- /*
- * if this request is completely handled and transfered to
- * userspace, remove its entry from the list and requeue it
- * again. Otherwise, we will revisit it again upon the next
- * call, taking into account its current read position.
- */
- if (list->pos == req->actual) {
- spin_lock_irqsave(&hidg->spinlock, flags);
- list_del(&list->list);
- kfree(list);
- spin_unlock_irqrestore(&hidg->spinlock, flags);
-
- req->length = hidg->report_length;
- ret = usb_ep_queue(hidg->out_ep, req, GFP_KERNEL);
- if (ret < 0)
- return ret;
- }
-
- return count;
-}
-
-static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_hidg *hidg = (struct f_hidg *)ep->driver_data;
-
- if (req->status != 0) {
- ERROR(hidg->func.config->cdev,
- "End Point Request ERROR: %d\n", req->status);
- }
-
- hidg->write_pending = 0;
- wake_up(&hidg->write_queue);
-}
-
-static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
- size_t count, loff_t *offp)
-{
- struct f_hidg *hidg = file->private_data;
- ssize_t status = -ENOMEM;
-
- if (!access_ok(VERIFY_READ, buffer, count))
- return -EFAULT;
-
- mutex_lock(&hidg->lock);
-
-#define WRITE_COND (!hidg->write_pending)
-
- /* write queue */
- while (!WRITE_COND) {
- mutex_unlock(&hidg->lock);
- if (file->f_flags & O_NONBLOCK)
- return -EAGAIN;
-
- if (wait_event_interruptible_exclusive(
- hidg->write_queue, WRITE_COND))
- return -ERESTARTSYS;
-
- mutex_lock(&hidg->lock);
- }
-
- count = min_t(unsigned, count, hidg->report_length);
- status = copy_from_user(hidg->req->buf, buffer, count);
-
- if (status != 0) {
- ERROR(hidg->func.config->cdev,
- "copy_from_user error\n");
- mutex_unlock(&hidg->lock);
- return -EINVAL;
- }
-
- hidg->req->status = 0;
- hidg->req->zero = 0;
- hidg->req->length = count;
- hidg->req->complete = f_hidg_req_complete;
- hidg->req->context = hidg;
- hidg->write_pending = 1;
-
- status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
- if (status < 0) {
- ERROR(hidg->func.config->cdev,
- "usb_ep_queue error on int endpoint %zd\n", status);
- hidg->write_pending = 0;
- wake_up(&hidg->write_queue);
- } else {
- status = count;
- }
-
- mutex_unlock(&hidg->lock);
-
- return status;
-}
-
-static unsigned int f_hidg_poll(struct file *file, poll_table *wait)
-{
- struct f_hidg *hidg = file->private_data;
- unsigned int ret = 0;
-
- poll_wait(file, &hidg->read_queue, wait);
- poll_wait(file, &hidg->write_queue, wait);
-
- if (WRITE_COND)
- ret |= POLLOUT | POLLWRNORM;
-
- if (READ_COND)
- ret |= POLLIN | POLLRDNORM;
-
- return ret;
-}
-
-#undef WRITE_COND
-#undef READ_COND
-
-static int f_hidg_release(struct inode *inode, struct file *fd)
-{
- fd->private_data = NULL;
- return 0;
-}
-
-static int f_hidg_open(struct inode *inode, struct file *fd)
-{
- struct f_hidg *hidg =
- container_of(inode->i_cdev, struct f_hidg, cdev);
-
- fd->private_data = hidg;
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-/* usb_function */
-
-static inline struct usb_request *hidg_alloc_ep_req(struct usb_ep *ep,
- unsigned length)
-{
- return alloc_ep_req(ep, length, length);
-}
-
-static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_hidg *hidg = (struct f_hidg *) req->context;
- struct f_hidg_req_list *req_list;
- unsigned long flags;
-
- req_list = kzalloc(sizeof(*req_list), GFP_ATOMIC);
- if (!req_list)
- return;
-
- req_list->req = req;
-
- spin_lock_irqsave(&hidg->spinlock, flags);
- list_add_tail(&req_list->list, &hidg->completed_out_req);
- spin_unlock_irqrestore(&hidg->spinlock, flags);
-
- wake_up(&hidg->read_queue);
-}
-
-static int hidg_setup(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct f_hidg *hidg = func_to_hidg(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int status = 0;
- __u16 value, length;
-
- value = __le16_to_cpu(ctrl->wValue);
- length = __le16_to_cpu(ctrl->wLength);
-
- VDBG(cdev, "hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x "
- "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value);
-
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
- | HID_REQ_GET_REPORT):
- VDBG(cdev, "get_report\n");
-
- /* send an empty report */
- length = min_t(unsigned, length, hidg->report_length);
- memset(req->buf, 0x0, length);
-
- goto respond;
- break;
-
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
- | HID_REQ_GET_PROTOCOL):
- VDBG(cdev, "get_protocol\n");
- goto stall;
- break;
-
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
- | HID_REQ_SET_REPORT):
- VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
- goto stall;
- break;
-
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
- | HID_REQ_SET_PROTOCOL):
- VDBG(cdev, "set_protocol\n");
- goto stall;
- break;
-
- case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
- | USB_REQ_GET_DESCRIPTOR):
- switch (value >> 8) {
- case HID_DT_HID:
- VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: HID\n");
- length = min_t(unsigned short, length,
- hidg_desc.bLength);
- memcpy(req->buf, &hidg_desc, length);
- goto respond;
- break;
- case HID_DT_REPORT:
- VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
- length = min_t(unsigned short, length,
- hidg->report_desc_length);
- memcpy(req->buf, hidg->report_desc, length);
- goto respond;
- break;
-
- default:
- VDBG(cdev, "Unknown descriptor request 0x%x\n",
- value >> 8);
- goto stall;
- break;
- }
- break;
-
- default:
- VDBG(cdev, "Unknown request 0x%x\n",
- ctrl->bRequest);
- goto stall;
- break;
- }
-
-stall:
- return -EOPNOTSUPP;
-
-respond:
- req->zero = 0;
- req->length = length;
- status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (status < 0)
- ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value);
- return status;
-}
-
-static void hidg_disable(struct usb_function *f)
-{
- struct f_hidg *hidg = func_to_hidg(f);
- struct f_hidg_req_list *list, *next;
-
- usb_ep_disable(hidg->in_ep);
- hidg->in_ep->driver_data = NULL;
-
- usb_ep_disable(hidg->out_ep);
- hidg->out_ep->driver_data = NULL;
-
- list_for_each_entry_safe(list, next, &hidg->completed_out_req, list) {
- list_del(&list->list);
- kfree(list);
- }
-}
-
-static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct usb_composite_dev *cdev = f->config->cdev;
- struct f_hidg *hidg = func_to_hidg(f);
- int i, status = 0;
-
- VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt);
-
- if (hidg->in_ep != NULL) {
- /* restart endpoint */
- if (hidg->in_ep->driver_data != NULL)
- usb_ep_disable(hidg->in_ep);
-
- status = config_ep_by_speed(f->config->cdev->gadget, f,
- hidg->in_ep);
- if (status) {
- ERROR(cdev, "config_ep_by_speed FAILED!\n");
- goto fail;
- }
- status = usb_ep_enable(hidg->in_ep);
- if (status < 0) {
- ERROR(cdev, "Enable IN endpoint FAILED!\n");
- goto fail;
- }
- hidg->in_ep->driver_data = hidg;
- }
-
-
- if (hidg->out_ep != NULL) {
- /* restart endpoint */
- if (hidg->out_ep->driver_data != NULL)
- usb_ep_disable(hidg->out_ep);
-
- status = config_ep_by_speed(f->config->cdev->gadget, f,
- hidg->out_ep);
- if (status) {
- ERROR(cdev, "config_ep_by_speed FAILED!\n");
- goto fail;
- }
- status = usb_ep_enable(hidg->out_ep);
- if (status < 0) {
- ERROR(cdev, "Enable IN endpoint FAILED!\n");
- goto fail;
- }
- hidg->out_ep->driver_data = hidg;
-
- /*
- * allocate a bunch of read buffers and queue them all at once.
- */
- for (i = 0; i < hidg->qlen && status == 0; i++) {
- struct usb_request *req =
- hidg_alloc_ep_req(hidg->out_ep,
- hidg->report_length);
- if (req) {
- req->complete = hidg_set_report_complete;
- req->context = hidg;
- status = usb_ep_queue(hidg->out_ep, req,
- GFP_ATOMIC);
- if (status)
- ERROR(cdev, "%s queue req --> %d\n",
- hidg->out_ep->name, status);
- } else {
- usb_ep_disable(hidg->out_ep);
- hidg->out_ep->driver_data = NULL;
- status = -ENOMEM;
- goto fail;
- }
- }
- }
-
-fail:
- return status;
-}
-
-const struct file_operations f_hidg_fops = {
- .owner = THIS_MODULE,
- .open = f_hidg_open,
- .release = f_hidg_release,
- .write = f_hidg_write,
- .read = f_hidg_read,
- .poll = f_hidg_poll,
- .llseek = noop_llseek,
-};
-
-static int __init hidg_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_ep *ep;
- struct f_hidg *hidg = func_to_hidg(f);
- int status;
- dev_t dev;
-
- /* allocate instance-specific interface IDs, and patch descriptors */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- hidg_interface_desc.bInterfaceNumber = status;
-
- /* allocate instance-specific endpoints */
- status = -ENODEV;
- ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_in_ep_desc);
- if (!ep)
- goto fail;
- ep->driver_data = c->cdev; /* claim */
- hidg->in_ep = ep;
-
- ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_out_ep_desc);
- if (!ep)
- goto fail;
- ep->driver_data = c->cdev; /* claim */
- hidg->out_ep = ep;
-
- /* preallocate request and buffer */
- status = -ENOMEM;
- hidg->req = usb_ep_alloc_request(hidg->in_ep, GFP_KERNEL);
- if (!hidg->req)
- goto fail;
-
- hidg->req->buf = kmalloc(hidg->report_length, GFP_KERNEL);
- if (!hidg->req->buf)
- goto fail;
-
- /* set descriptor dynamic values */
- hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
- hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
- hidg_hs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
- hidg_fs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
- hidg_hs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
- hidg_fs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
- hidg_desc.desc[0].bDescriptorType = HID_DT_REPORT;
- hidg_desc.desc[0].wDescriptorLength =
- cpu_to_le16(hidg->report_desc_length);
-
- hidg_hs_in_ep_desc.bEndpointAddress =
- hidg_fs_in_ep_desc.bEndpointAddress;
- hidg_hs_out_ep_desc.bEndpointAddress =
- hidg_fs_out_ep_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, hidg_fs_descriptors,
- hidg_hs_descriptors, NULL);
- if (status)
- goto fail;
-
- mutex_init(&hidg->lock);
- spin_lock_init(&hidg->spinlock);
- init_waitqueue_head(&hidg->write_queue);
- init_waitqueue_head(&hidg->read_queue);
- INIT_LIST_HEAD(&hidg->completed_out_req);
-
- /* create char device */
- cdev_init(&hidg->cdev, &f_hidg_fops);
- dev = MKDEV(major, hidg->minor);
- status = cdev_add(&hidg->cdev, dev, 1);
- if (status)
- goto fail;
-
- device_create(hidg_class, NULL, dev, NULL, "%s%d", "hidg", hidg->minor);
-
- return 0;
-
-fail:
- ERROR(f->config->cdev, "hidg_bind FAILED\n");
- if (hidg->req != NULL) {
- kfree(hidg->req->buf);
- if (hidg->in_ep != NULL)
- usb_ep_free_request(hidg->in_ep, hidg->req);
- }
-
- usb_free_all_descriptors(f);
- return status;
-}
-
-static void hidg_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_hidg *hidg = func_to_hidg(f);
-
- device_destroy(hidg_class, MKDEV(major, hidg->minor));
- cdev_del(&hidg->cdev);
-
- /* disable/free request and end point */
- usb_ep_disable(hidg->in_ep);
- usb_ep_dequeue(hidg->in_ep, hidg->req);
- kfree(hidg->req->buf);
- usb_ep_free_request(hidg->in_ep, hidg->req);
-
- usb_free_all_descriptors(f);
-
- kfree(hidg->report_desc);
- kfree(hidg);
-}
-
-/*-------------------------------------------------------------------------*/
-/* Strings */
-
-#define CT_FUNC_HID_IDX 0
-
-static struct usb_string ct_func_string_defs[] = {
- [CT_FUNC_HID_IDX].s = "HID Interface",
- {}, /* end of list */
-};
-
-static struct usb_gadget_strings ct_func_string_table = {
- .language = 0x0409, /* en-US */
- .strings = ct_func_string_defs,
-};
-
-static struct usb_gadget_strings *ct_func_strings[] = {
- &ct_func_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-/* usb_configuration */
-
-int __init hidg_bind_config(struct usb_configuration *c,
- struct hidg_func_descriptor *fdesc, int index)
-{
- struct f_hidg *hidg;
- int status;
-
- if (index >= minors)
- return -ENOENT;
-
- /* maybe allocate device-global string IDs, and patch descriptors */
- if (ct_func_string_defs[CT_FUNC_HID_IDX].id == 0) {
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- ct_func_string_defs[CT_FUNC_HID_IDX].id = status;
- hidg_interface_desc.iInterface = status;
- }
-
- /* allocate and initialize one new instance */
- hidg = kzalloc(sizeof *hidg, GFP_KERNEL);
- if (!hidg)
- return -ENOMEM;
-
- hidg->minor = index;
- hidg->bInterfaceSubClass = fdesc->subclass;
- hidg->bInterfaceProtocol = fdesc->protocol;
- hidg->report_length = fdesc->report_length;
- hidg->report_desc_length = fdesc->report_desc_length;
- hidg->report_desc = kmemdup(fdesc->report_desc,
- fdesc->report_desc_length,
- GFP_KERNEL);
- if (!hidg->report_desc) {
- kfree(hidg);
- return -ENOMEM;
- }
-
- hidg->func.name = "hid";
- hidg->func.strings = ct_func_strings;
- hidg->func.bind = hidg_bind;
- hidg->func.unbind = hidg_unbind;
- hidg->func.set_alt = hidg_set_alt;
- hidg->func.disable = hidg_disable;
- hidg->func.setup = hidg_setup;
-
- /* this could me made configurable at some point */
- hidg->qlen = 4;
-
- status = usb_add_function(c, &hidg->func);
- if (status)
- kfree(hidg);
-
- return status;
-}
-
-int __init ghid_setup(struct usb_gadget *g, int count)
-{
- int status;
- dev_t dev;
-
- hidg_class = class_create(THIS_MODULE, "hidg");
-
- status = alloc_chrdev_region(&dev, 0, count, "hidg");
- if (!status) {
- major = MAJOR(dev);
- minors = count;
- }
-
- return status;
-}
-
-void ghid_cleanup(void)
-{
- if (major) {
- unregister_chrdev_region(MKDEV(major, 0), minors);
- major = minors = 0;
- }
-
- class_destroy(hidg_class);
- hidg_class = NULL;
-}
+++ /dev/null
-/*
- * f_loopback.c - USB peripheral loopback configuration driver
- *
- * Copyright (C) 2003-2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/usb/composite.h>
-
-#include "g_zero.h"
-#include "u_f.h"
-
-/*
- * LOOPBACK FUNCTION ... a testing vehicle for USB peripherals,
- *
- * This takes messages of various sizes written OUT to a device, and loops
- * them back so they can be read IN from it. It has been used by certain
- * test applications. It supports limited testing of data queueing logic.
- *
- *
- * This is currently packaged as a configuration driver, which can't be
- * combined with other functions to make composite devices. However, it
- * can be combined with other independent configurations.
- */
-struct f_loopback {
- struct usb_function function;
-
- struct usb_ep *in_ep;
- struct usb_ep *out_ep;
-};
-
-static inline struct f_loopback *func_to_loop(struct usb_function *f)
-{
- return container_of(f, struct f_loopback, function);
-}
-
-static unsigned qlen;
-static unsigned buflen;
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_interface_descriptor loopback_intf = {
- .bLength = sizeof loopback_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
- /* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_loop_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_loop_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *fs_loopback_descs[] = {
- (struct usb_descriptor_header *) &loopback_intf,
- (struct usb_descriptor_header *) &fs_loop_sink_desc,
- (struct usb_descriptor_header *) &fs_loop_source_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_loop_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_loop_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *hs_loopback_descs[] = {
- (struct usb_descriptor_header *) &loopback_intf,
- (struct usb_descriptor_header *) &hs_loop_source_desc,
- (struct usb_descriptor_header *) &hs_loop_sink_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_loop_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_loop_source_comp_desc = {
- .bLength = USB_DT_SS_EP_COMP_SIZE,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = 0,
-};
-
-static struct usb_endpoint_descriptor ss_loop_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_loop_sink_comp_desc = {
- .bLength = USB_DT_SS_EP_COMP_SIZE,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = 0,
-};
-
-static struct usb_descriptor_header *ss_loopback_descs[] = {
- (struct usb_descriptor_header *) &loopback_intf,
- (struct usb_descriptor_header *) &ss_loop_source_desc,
- (struct usb_descriptor_header *) &ss_loop_source_comp_desc,
- (struct usb_descriptor_header *) &ss_loop_sink_desc,
- (struct usb_descriptor_header *) &ss_loop_sink_comp_desc,
- NULL,
-};
-
-/* function-specific strings: */
-
-static struct usb_string strings_loopback[] = {
- [0].s = "loop input to output",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings stringtab_loop = {
- .language = 0x0409, /* en-us */
- .strings = strings_loopback,
-};
-
-static struct usb_gadget_strings *loopback_strings[] = {
- &stringtab_loop,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int loopback_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_loopback *loop = func_to_loop(f);
- int id;
- int ret;
-
- /* allocate interface ID(s) */
- id = usb_interface_id(c, f);
- if (id < 0)
- return id;
- loopback_intf.bInterfaceNumber = id;
-
- id = usb_string_id(cdev);
- if (id < 0)
- return id;
- strings_loopback[0].id = id;
- loopback_intf.iInterface = id;
-
- /* allocate endpoints */
-
- loop->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_source_desc);
- if (!loop->in_ep) {
-autoconf_fail:
- ERROR(cdev, "%s: can't autoconfigure on %s\n",
- f->name, cdev->gadget->name);
- return -ENODEV;
- }
- loop->in_ep->driver_data = cdev; /* claim */
-
- loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_sink_desc);
- if (!loop->out_ep)
- goto autoconf_fail;
- loop->out_ep->driver_data = cdev; /* claim */
-
- /* support high speed hardware */
- hs_loop_source_desc.bEndpointAddress =
- fs_loop_source_desc.bEndpointAddress;
- hs_loop_sink_desc.bEndpointAddress = fs_loop_sink_desc.bEndpointAddress;
-
- /* support super speed hardware */
- ss_loop_source_desc.bEndpointAddress =
- fs_loop_source_desc.bEndpointAddress;
- ss_loop_sink_desc.bEndpointAddress = fs_loop_sink_desc.bEndpointAddress;
-
- ret = usb_assign_descriptors(f, fs_loopback_descs, hs_loopback_descs,
- ss_loopback_descs);
- if (ret)
- return ret;
-
- DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
- (gadget_is_superspeed(c->cdev->gadget) ? "super" :
- (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
- f->name, loop->in_ep->name, loop->out_ep->name);
- return 0;
-}
-
-static void lb_free_func(struct usb_function *f)
-{
- struct f_lb_opts *opts;
-
- opts = container_of(f->fi, struct f_lb_opts, func_inst);
-
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-
- usb_free_all_descriptors(f);
- kfree(func_to_loop(f));
-}
-
-static void loopback_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_loopback *loop = ep->driver_data;
- struct usb_composite_dev *cdev = loop->function.config->cdev;
- int status = req->status;
-
- switch (status) {
-
- case 0: /* normal completion? */
- if (ep == loop->out_ep) {
- /* loop this OUT packet back IN to the host */
- req->zero = (req->actual < req->length);
- req->length = req->actual;
- status = usb_ep_queue(loop->in_ep, req, GFP_ATOMIC);
- if (status == 0)
- return;
-
- /* "should never get here" */
- ERROR(cdev, "can't loop %s to %s: %d\n",
- ep->name, loop->in_ep->name,
- status);
- }
-
- /* queue the buffer for some later OUT packet */
- req->length = buflen;
- status = usb_ep_queue(loop->out_ep, req, GFP_ATOMIC);
- if (status == 0)
- return;
-
- /* "should never get here" */
- /* FALLTHROUGH */
-
- default:
- ERROR(cdev, "%s loop complete --> %d, %d/%d\n", ep->name,
- status, req->actual, req->length);
- /* FALLTHROUGH */
-
- /* NOTE: since this driver doesn't maintain an explicit record
- * of requests it submitted (just maintains qlen count), we
- * rely on the hardware driver to clean up on disconnect or
- * endpoint disable.
- */
- case -ECONNABORTED: /* hardware forced ep reset */
- case -ECONNRESET: /* request dequeued */
- case -ESHUTDOWN: /* disconnect from host */
- free_ep_req(ep, req);
- return;
- }
-}
-
-static void disable_loopback(struct f_loopback *loop)
-{
- struct usb_composite_dev *cdev;
-
- cdev = loop->function.config->cdev;
- disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL);
- VDBG(cdev, "%s disabled\n", loop->function.name);
-}
-
-static inline struct usb_request *lb_alloc_ep_req(struct usb_ep *ep, int len)
-{
- return alloc_ep_req(ep, len, buflen);
-}
-
-static int
-enable_loopback(struct usb_composite_dev *cdev, struct f_loopback *loop)
-{
- int result = 0;
- struct usb_ep *ep;
- struct usb_request *req;
- unsigned i;
-
- /* one endpoint writes data back IN to the host */
- ep = loop->in_ep;
- result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);
- if (result)
- return result;
- result = usb_ep_enable(ep);
- if (result < 0)
- return result;
- ep->driver_data = loop;
-
- /* one endpoint just reads OUT packets */
- ep = loop->out_ep;
- result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);
- if (result)
- goto fail0;
-
- result = usb_ep_enable(ep);
- if (result < 0) {
-fail0:
- ep = loop->in_ep;
- usb_ep_disable(ep);
- ep->driver_data = NULL;
- return result;
- }
- ep->driver_data = loop;
-
- /* allocate a bunch of read buffers and queue them all at once.
- * we buffer at most 'qlen' transfers; fewer if any need more
- * than 'buflen' bytes each.
- */
- for (i = 0; i < qlen && result == 0; i++) {
- req = lb_alloc_ep_req(ep, 0);
- if (req) {
- req->complete = loopback_complete;
- result = usb_ep_queue(ep, req, GFP_ATOMIC);
- if (result)
- ERROR(cdev, "%s queue req --> %d\n",
- ep->name, result);
- } else {
- usb_ep_disable(ep);
- ep->driver_data = NULL;
- result = -ENOMEM;
- goto fail0;
- }
- }
-
- DBG(cdev, "%s enabled\n", loop->function.name);
- return result;
-}
-
-static int loopback_set_alt(struct usb_function *f,
- unsigned intf, unsigned alt)
-{
- struct f_loopback *loop = func_to_loop(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* we know alt is zero */
- if (loop->in_ep->driver_data)
- disable_loopback(loop);
- return enable_loopback(cdev, loop);
-}
-
-static void loopback_disable(struct usb_function *f)
-{
- struct f_loopback *loop = func_to_loop(f);
-
- disable_loopback(loop);
-}
-
-static struct usb_function *loopback_alloc(struct usb_function_instance *fi)
-{
- struct f_loopback *loop;
- struct f_lb_opts *lb_opts;
-
- loop = kzalloc(sizeof *loop, GFP_KERNEL);
- if (!loop)
- return ERR_PTR(-ENOMEM);
-
- lb_opts = container_of(fi, struct f_lb_opts, func_inst);
-
- mutex_lock(&lb_opts->lock);
- lb_opts->refcnt++;
- mutex_unlock(&lb_opts->lock);
-
- buflen = lb_opts->bulk_buflen;
- qlen = lb_opts->qlen;
- if (!qlen)
- qlen = 32;
-
- loop->function.name = "loopback";
- loop->function.bind = loopback_bind;
- loop->function.set_alt = loopback_set_alt;
- loop->function.disable = loopback_disable;
- loop->function.strings = loopback_strings;
-
- loop->function.free_func = lb_free_func;
-
- return &loop->function;
-}
-
-static inline struct f_lb_opts *to_f_lb_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_lb_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_lb_opts);
-CONFIGFS_ATTR_OPS(f_lb_opts);
-
-static void lb_attr_release(struct config_item *item)
-{
- struct f_lb_opts *lb_opts = to_f_lb_opts(item);
-
- usb_put_function_instance(&lb_opts->func_inst);
-}
-
-static struct configfs_item_operations lb_item_ops = {
- .release = lb_attr_release,
- .show_attribute = f_lb_opts_attr_show,
- .store_attribute = f_lb_opts_attr_store,
-};
-
-static ssize_t f_lb_opts_qlen_show(struct f_lb_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->qlen);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_lb_opts_qlen_store(struct f_lb_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u32 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou32(page, 0, &num);
- if (ret)
- goto end;
-
- opts->qlen = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_lb_opts_attribute f_lb_opts_qlen =
- __CONFIGFS_ATTR(qlen, S_IRUGO | S_IWUSR,
- f_lb_opts_qlen_show,
- f_lb_opts_qlen_store);
-
-static ssize_t f_lb_opts_bulk_buflen_show(struct f_lb_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->bulk_buflen);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_lb_opts_bulk_buflen_store(struct f_lb_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u32 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou32(page, 0, &num);
- if (ret)
- goto end;
-
- opts->bulk_buflen = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_lb_opts_attribute f_lb_opts_bulk_buflen =
- __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
- f_lb_opts_bulk_buflen_show,
- f_lb_opts_bulk_buflen_store);
-
-static struct configfs_attribute *lb_attrs[] = {
- &f_lb_opts_qlen.attr,
- &f_lb_opts_bulk_buflen.attr,
- NULL,
-};
-
-static struct config_item_type lb_func_type = {
- .ct_item_ops = &lb_item_ops,
- .ct_attrs = lb_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void lb_free_instance(struct usb_function_instance *fi)
-{
- struct f_lb_opts *lb_opts;
-
- lb_opts = container_of(fi, struct f_lb_opts, func_inst);
- kfree(lb_opts);
-}
-
-static struct usb_function_instance *loopback_alloc_instance(void)
-{
- struct f_lb_opts *lb_opts;
-
- lb_opts = kzalloc(sizeof(*lb_opts), GFP_KERNEL);
- if (!lb_opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&lb_opts->lock);
- lb_opts->func_inst.free_func_inst = lb_free_instance;
- lb_opts->bulk_buflen = GZERO_BULK_BUFLEN;
- lb_opts->qlen = GZERO_QLEN;
-
- config_group_init_type_name(&lb_opts->func_inst.group, "",
- &lb_func_type);
-
- return &lb_opts->func_inst;
-}
-DECLARE_USB_FUNCTION(Loopback, loopback_alloc_instance, loopback_alloc);
-
-int __init lb_modinit(void)
-{
- int ret;
-
- ret = usb_function_register(&Loopbackusb_func);
- if (ret)
- return ret;
- return ret;
-}
-void __exit lb_modexit(void)
-{
- usb_function_unregister(&Loopbackusb_func);
-}
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * f_mass_storage.c -- Mass Storage USB Composite Function
- *
- * Copyright (C) 2003-2008 Alan Stern
- * Copyright (C) 2009 Samsung Electronics
- * Author: Michal Nazarewicz <mina86@mina86.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation, either version 2 of that License or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * The Mass Storage Function acts as a USB Mass Storage device,
- * appearing to the host as a disk drive or as a CD-ROM drive. In
- * addition to providing an example of a genuinely useful composite
- * function for a USB device, it also illustrates a technique of
- * double-buffering for increased throughput.
- *
- * For more information about MSF and in particular its module
- * parameters and sysfs interface read the
- * <Documentation/usb/mass-storage.txt> file.
- */
-
-/*
- * MSF is configured by specifying a fsg_config structure. It has the
- * following fields:
- *
- * nluns Number of LUNs function have (anywhere from 1
- * to FSG_MAX_LUNS which is 8).
- * luns An array of LUN configuration values. This
- * should be filled for each LUN that
- * function will include (ie. for "nluns"
- * LUNs). Each element of the array has
- * the following fields:
- * ->filename The path to the backing file for the LUN.
- * Required if LUN is not marked as
- * removable.
- * ->ro Flag specifying access to the LUN shall be
- * read-only. This is implied if CD-ROM
- * emulation is enabled as well as when
- * it was impossible to open "filename"
- * in R/W mode.
- * ->removable Flag specifying that LUN shall be indicated as
- * being removable.
- * ->cdrom Flag specifying that LUN shall be reported as
- * being a CD-ROM.
- * ->nofua Flag specifying that FUA flag in SCSI WRITE(10,12)
- * commands for this LUN shall be ignored.
- *
- * vendor_name
- * product_name
- * release Information used as a reply to INQUIRY
- * request. To use default set to NULL,
- * NULL, 0xffff respectively. The first
- * field should be 8 and the second 16
- * characters or less.
- *
- * can_stall Set to permit function to halt bulk endpoints.
- * Disabled on some USB devices known not
- * to work correctly. You should set it
- * to true.
- *
- * If "removable" is not set for a LUN then a backing file must be
- * specified. If it is set, then NULL filename means the LUN's medium
- * is not loaded (an empty string as "filename" in the fsg_config
- * structure causes error). The CD-ROM emulation includes a single
- * data track and no audio tracks; hence there need be only one
- * backing file per LUN.
- *
- * This function is heavily based on "File-backed Storage Gadget" by
- * Alan Stern which in turn is heavily based on "Gadget Zero" by David
- * Brownell. The driver's SCSI command interface was based on the
- * "Information technology - Small Computer System Interface - 2"
- * document from X3T9.2 Project 375D, Revision 10L, 7-SEP-93,
- * available at <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>.
- * The single exception is opcode 0x23 (READ FORMAT CAPACITIES), which
- * was based on the "Universal Serial Bus Mass Storage Class UFI
- * Command Specification" document, Revision 1.0, December 14, 1998,
- * available at
- * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>.
- */
-
-/*
- * Driver Design
- *
- * The MSF is fairly straightforward. There is a main kernel
- * thread that handles most of the work. Interrupt routines field
- * callbacks from the controller driver: bulk- and interrupt-request
- * completion notifications, endpoint-0 events, and disconnect events.
- * Completion events are passed to the main thread by wakeup calls. Many
- * ep0 requests are handled at interrupt time, but SetInterface,
- * SetConfiguration, and device reset requests are forwarded to the
- * thread in the form of "exceptions" using SIGUSR1 signals (since they
- * should interrupt any ongoing file I/O operations).
- *
- * The thread's main routine implements the standard command/data/status
- * parts of a SCSI interaction. It and its subroutines are full of tests
- * for pending signals/exceptions -- all this polling is necessary since
- * the kernel has no setjmp/longjmp equivalents. (Maybe this is an
- * indication that the driver really wants to be running in userspace.)
- * An important point is that so long as the thread is alive it keeps an
- * open reference to the backing file. This will prevent unmounting
- * the backing file's underlying filesystem and could cause problems
- * during system shutdown, for example. To prevent such problems, the
- * thread catches INT, TERM, and KILL signals and converts them into
- * an EXIT exception.
- *
- * In normal operation the main thread is started during the gadget's
- * fsg_bind() callback and stopped during fsg_unbind(). But it can
- * also exit when it receives a signal, and there's no point leaving
- * the gadget running when the thread is dead. As of this moment, MSF
- * provides no way to deregister the gadget when thread dies -- maybe
- * a callback functions is needed.
- *
- * To provide maximum throughput, the driver uses a circular pipeline of
- * buffer heads (struct fsg_buffhd). In principle the pipeline can be
- * arbitrarily long; in practice the benefits don't justify having more
- * than 2 stages (i.e., double buffering). But it helps to think of the
- * pipeline as being a long one. Each buffer head contains a bulk-in and
- * a bulk-out request pointer (since the buffer can be used for both
- * output and input -- directions always are given from the host's
- * point of view) as well as a pointer to the buffer and various state
- * variables.
- *
- * Use of the pipeline follows a simple protocol. There is a variable
- * (fsg->next_buffhd_to_fill) that points to the next buffer head to use.
- * At any time that buffer head may still be in use from an earlier
- * request, so each buffer head has a state variable indicating whether
- * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the
- * buffer head to be EMPTY, filling the buffer either by file I/O or by
- * USB I/O (during which the buffer head is BUSY), and marking the buffer
- * head FULL when the I/O is complete. Then the buffer will be emptied
- * (again possibly by USB I/O, during which it is marked BUSY) and
- * finally marked EMPTY again (possibly by a completion routine).
- *
- * A module parameter tells the driver to avoid stalling the bulk
- * endpoints wherever the transport specification allows. This is
- * necessary for some UDCs like the SuperH, which cannot reliably clear a
- * halt on a bulk endpoint. However, under certain circumstances the
- * Bulk-only specification requires a stall. In such cases the driver
- * will halt the endpoint and set a flag indicating that it should clear
- * the halt in software during the next device reset. Hopefully this
- * will permit everything to work correctly. Furthermore, although the
- * specification allows the bulk-out endpoint to halt when the host sends
- * too much data, implementing this would cause an unavoidable race.
- * The driver will always use the "no-stall" approach for OUT transfers.
- *
- * One subtle point concerns sending status-stage responses for ep0
- * requests. Some of these requests, such as device reset, can involve
- * interrupting an ongoing file I/O operation, which might take an
- * arbitrarily long time. During that delay the host might give up on
- * the original ep0 request and issue a new one. When that happens the
- * driver should not notify the host about completion of the original
- * request, as the host will no longer be waiting for it. So the driver
- * assigns to each ep0 request a unique tag, and it keeps track of the
- * tag value of the request associated with a long-running exception
- * (device-reset, interface-change, or configuration-change). When the
- * exception handler is finished, the status-stage response is submitted
- * only if the current ep0 request tag is equal to the exception request
- * tag. Thus only the most recently received ep0 request will get a
- * status-stage response.
- *
- * Warning: This driver source file is too long. It ought to be split up
- * into a header file plus about 3 separate .c files, to handle the details
- * of the Gadget, USB Mass Storage, and SCSI protocols.
- */
-
-
-/* #define VERBOSE_DEBUG */
-/* #define DUMP_MSGS */
-
-#include <linux/blkdev.h>
-#include <linux/completion.h>
-#include <linux/dcache.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/fcntl.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/kref.h>
-#include <linux/kthread.h>
-#include <linux/limits.h>
-#include <linux/rwsem.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/string.h>
-#include <linux/freezer.h>
-#include <linux/module.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/composite.h>
-
-#include "gadget_chips.h"
-#include "configfs.h"
-
-
-/*------------------------------------------------------------------------*/
-
-#define FSG_DRIVER_DESC "Mass Storage Function"
-#define FSG_DRIVER_VERSION "2009/09/11"
-
-static const char fsg_string_interface[] = "Mass Storage";
-
-#include "storage_common.h"
-#include "f_mass_storage.h"
-
-/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
-static struct usb_string fsg_strings[] = {
- {FSG_STRING_INTERFACE, fsg_string_interface},
- {}
-};
-
-static struct usb_gadget_strings fsg_stringtab = {
- .language = 0x0409, /* en-us */
- .strings = fsg_strings,
-};
-
-static struct usb_gadget_strings *fsg_strings_array[] = {
- &fsg_stringtab,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-struct fsg_dev;
-struct fsg_common;
-
-/* Data shared by all the FSG instances. */
-struct fsg_common {
- struct usb_gadget *gadget;
- struct usb_composite_dev *cdev;
- struct fsg_dev *fsg, *new_fsg;
- wait_queue_head_t fsg_wait;
-
- /* filesem protects: backing files in use */
- struct rw_semaphore filesem;
-
- /* lock protects: state, all the req_busy's */
- spinlock_t lock;
-
- struct usb_ep *ep0; /* Copy of gadget->ep0 */
- struct usb_request *ep0req; /* Copy of cdev->req */
- unsigned int ep0_req_tag;
-
- struct fsg_buffhd *next_buffhd_to_fill;
- struct fsg_buffhd *next_buffhd_to_drain;
- struct fsg_buffhd *buffhds;
- unsigned int fsg_num_buffers;
-
- int cmnd_size;
- u8 cmnd[MAX_COMMAND_SIZE];
-
- unsigned int nluns;
- unsigned int lun;
- struct fsg_lun **luns;
- struct fsg_lun *curlun;
-
- unsigned int bulk_out_maxpacket;
- enum fsg_state state; /* For exception handling */
- unsigned int exception_req_tag;
-
- enum data_direction data_dir;
- u32 data_size;
- u32 data_size_from_cmnd;
- u32 tag;
- u32 residue;
- u32 usb_amount_left;
-
- unsigned int can_stall:1;
- unsigned int free_storage_on_release:1;
- unsigned int phase_error:1;
- unsigned int short_packet_received:1;
- unsigned int bad_lun_okay:1;
- unsigned int running:1;
- unsigned int sysfs:1;
-
- int thread_wakeup_needed;
- struct completion thread_notifier;
- struct task_struct *thread_task;
-
- /* Callback functions. */
- const struct fsg_operations *ops;
- /* Gadget's private data. */
- void *private_data;
-
- /*
- * Vendor (8 chars), product (16 chars), release (4
- * hexadecimal digits) and NUL byte
- */
- char inquiry_string[8 + 16 + 4 + 1];
-
- struct kref ref;
-};
-
-struct fsg_dev {
- struct usb_function function;
- struct usb_gadget *gadget; /* Copy of cdev->gadget */
- struct fsg_common *common;
-
- u16 interface_number;
-
- unsigned int bulk_in_enabled:1;
- unsigned int bulk_out_enabled:1;
-
- unsigned long atomic_bitflags;
-#define IGNORE_BULK_OUT 0
-
- struct usb_ep *bulk_in;
- struct usb_ep *bulk_out;
-};
-
-static inline int __fsg_is_set(struct fsg_common *common,
- const char *func, unsigned line)
-{
- if (common->fsg)
- return 1;
- ERROR(common, "common->fsg is NULL in %s at %u\n", func, line);
- WARN_ON(1);
- return 0;
-}
-
-#define fsg_is_set(common) likely(__fsg_is_set(common, __func__, __LINE__))
-
-static inline struct fsg_dev *fsg_from_func(struct usb_function *f)
-{
- return container_of(f, struct fsg_dev, function);
-}
-
-typedef void (*fsg_routine_t)(struct fsg_dev *);
-
-static int exception_in_progress(struct fsg_common *common)
-{
- return common->state > FSG_STATE_IDLE;
-}
-
-/* Make bulk-out requests be divisible by the maxpacket size */
-static void set_bulk_out_req_length(struct fsg_common *common,
- struct fsg_buffhd *bh, unsigned int length)
-{
- unsigned int rem;
-
- bh->bulk_out_intended_length = length;
- rem = length % common->bulk_out_maxpacket;
- if (rem > 0)
- length += common->bulk_out_maxpacket - rem;
- bh->outreq->length = length;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
-{
- const char *name;
-
- if (ep == fsg->bulk_in)
- name = "bulk-in";
- else if (ep == fsg->bulk_out)
- name = "bulk-out";
- else
- name = ep->name;
- DBG(fsg, "%s set halt\n", name);
- return usb_ep_set_halt(ep);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* These routines may be called in process context or in_irq */
-
-/* Caller must hold fsg->lock */
-static void wakeup_thread(struct fsg_common *common)
-{
- smp_wmb(); /* ensure the write of bh->state is complete */
- /* Tell the main thread that something has happened */
- common->thread_wakeup_needed = 1;
- if (common->thread_task)
- wake_up_process(common->thread_task);
-}
-
-static void raise_exception(struct fsg_common *common, enum fsg_state new_state)
-{
- unsigned long flags;
-
- /*
- * Do nothing if a higher-priority exception is already in progress.
- * If a lower-or-equal priority exception is in progress, preempt it
- * and notify the main thread by sending it a signal.
- */
- spin_lock_irqsave(&common->lock, flags);
- if (common->state <= new_state) {
- common->exception_req_tag = common->ep0_req_tag;
- common->state = new_state;
- if (common->thread_task)
- send_sig_info(SIGUSR1, SEND_SIG_FORCED,
- common->thread_task);
- }
- spin_unlock_irqrestore(&common->lock, flags);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int ep0_queue(struct fsg_common *common)
-{
- int rc;
-
- rc = usb_ep_queue(common->ep0, common->ep0req, GFP_ATOMIC);
- common->ep0->driver_data = common;
- if (rc != 0 && rc != -ESHUTDOWN) {
- /* We can't do much more than wait for a reset */
- WARNING(common, "error in submission: %s --> %d\n",
- common->ep0->name, rc);
- }
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* Completion handlers. These always run in_irq. */
-
-static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct fsg_common *common = ep->driver_data;
- struct fsg_buffhd *bh = req->context;
-
- if (req->status || req->actual != req->length)
- DBG(common, "%s --> %d, %u/%u\n", __func__,
- req->status, req->actual, req->length);
- if (req->status == -ECONNRESET) /* Request was cancelled */
- usb_ep_fifo_flush(ep);
-
- /* Hold the lock while we update the request and buffer states */
- smp_wmb();
- spin_lock(&common->lock);
- bh->inreq_busy = 0;
- bh->state = BUF_STATE_EMPTY;
- wakeup_thread(common);
- spin_unlock(&common->lock);
-}
-
-static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct fsg_common *common = ep->driver_data;
- struct fsg_buffhd *bh = req->context;
-
- dump_msg(common, "bulk-out", req->buf, req->actual);
- if (req->status || req->actual != bh->bulk_out_intended_length)
- DBG(common, "%s --> %d, %u/%u\n", __func__,
- req->status, req->actual, bh->bulk_out_intended_length);
- if (req->status == -ECONNRESET) /* Request was cancelled */
- usb_ep_fifo_flush(ep);
-
- /* Hold the lock while we update the request and buffer states */
- smp_wmb();
- spin_lock(&common->lock);
- bh->outreq_busy = 0;
- bh->state = BUF_STATE_FULL;
- wakeup_thread(common);
- spin_unlock(&common->lock);
-}
-
-static int fsg_setup(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- struct usb_request *req = fsg->common->ep0req;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- if (!fsg_is_set(fsg->common))
- return -EOPNOTSUPP;
-
- ++fsg->common->ep0_req_tag; /* Record arrival of a new request */
- req->context = NULL;
- req->length = 0;
- dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
-
- switch (ctrl->bRequest) {
-
- case US_BULK_RESET_REQUEST:
- if (ctrl->bRequestType !=
- (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != fsg->interface_number || w_value != 0 ||
- w_length != 0)
- return -EDOM;
-
- /*
- * Raise an exception to stop the current operation
- * and reinitialize our state.
- */
- DBG(fsg, "bulk reset request\n");
- raise_exception(fsg->common, FSG_STATE_RESET);
- return USB_GADGET_DELAYED_STATUS;
-
- case US_BULK_GET_MAX_LUN:
- if (ctrl->bRequestType !=
- (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != fsg->interface_number || w_value != 0 ||
- w_length != 1)
- return -EDOM;
- VDBG(fsg, "get max LUN\n");
- *(u8 *)req->buf = fsg->common->nluns - 1;
-
- /* Respond with data/status */
- req->length = min((u16)1, w_length);
- return ep0_queue(fsg->common);
- }
-
- VDBG(fsg,
- "unknown class-specific control req %02x.%02x v%04x i%04x l%u\n",
- ctrl->bRequestType, ctrl->bRequest,
- le16_to_cpu(ctrl->wValue), w_index, w_length);
- return -EOPNOTSUPP;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* All the following routines run in process context */
-
-/* Use this for bulk or interrupt transfers, not ep0 */
-static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
- struct usb_request *req, int *pbusy,
- enum fsg_buffer_state *state)
-{
- int rc;
-
- if (ep == fsg->bulk_in)
- dump_msg(fsg, "bulk-in", req->buf, req->length);
-
- spin_lock_irq(&fsg->common->lock);
- *pbusy = 1;
- *state = BUF_STATE_BUSY;
- spin_unlock_irq(&fsg->common->lock);
- rc = usb_ep_queue(ep, req, GFP_KERNEL);
- if (rc != 0) {
- *pbusy = 0;
- *state = BUF_STATE_EMPTY;
-
- /* We can't do much more than wait for a reset */
-
- /*
- * Note: currently the net2280 driver fails zero-length
- * submissions if DMA is enabled.
- */
- if (rc != -ESHUTDOWN &&
- !(rc == -EOPNOTSUPP && req->length == 0))
- WARNING(fsg, "error in submission: %s --> %d\n",
- ep->name, rc);
- }
-}
-
-static bool start_in_transfer(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- if (!fsg_is_set(common))
- return false;
- start_transfer(common->fsg, common->fsg->bulk_in,
- bh->inreq, &bh->inreq_busy, &bh->state);
- return true;
-}
-
-static bool start_out_transfer(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- if (!fsg_is_set(common))
- return false;
- start_transfer(common->fsg, common->fsg->bulk_out,
- bh->outreq, &bh->outreq_busy, &bh->state);
- return true;
-}
-
-static int sleep_thread(struct fsg_common *common, bool can_freeze)
-{
- int rc = 0;
-
- /* Wait until a signal arrives or we are woken up */
- for (;;) {
- if (can_freeze)
- try_to_freeze();
- set_current_state(TASK_INTERRUPTIBLE);
- if (signal_pending(current)) {
- rc = -EINTR;
- break;
- }
- if (common->thread_wakeup_needed)
- break;
- schedule();
- }
- __set_current_state(TASK_RUNNING);
- common->thread_wakeup_needed = 0;
- smp_rmb(); /* ensure the latest bh->state is visible */
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_read(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba;
- struct fsg_buffhd *bh;
- int rc;
- u32 amount_left;
- loff_t file_offset, file_offset_tmp;
- unsigned int amount;
- ssize_t nread;
-
- /*
- * Get the starting Logical Block Address and check that it's
- * not too big.
- */
- if (common->cmnd[0] == READ_6)
- lba = get_unaligned_be24(&common->cmnd[1]);
- else {
- lba = get_unaligned_be32(&common->cmnd[2]);
-
- /*
- * We allow DPO (Disable Page Out = don't save data in the
- * cache) and FUA (Force Unit Access = don't read from the
- * cache), but we don't implement them.
- */
- if ((common->cmnd[1] & ~0x18) != 0) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- }
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
- file_offset = ((loff_t) lba) << curlun->blkbits;
-
- /* Carry out the file reads */
- amount_left = common->data_size_from_cmnd;
- if (unlikely(amount_left == 0))
- return -EIO; /* No default reply */
-
- for (;;) {
- /*
- * Figure out how much we need to read:
- * Try to read the remaining amount.
- * But don't read more than the buffer size.
- * And don't try to read past the end of the file.
- */
- amount = min(amount_left, FSG_BUFLEN);
- amount = min((loff_t)amount,
- curlun->file_length - file_offset);
-
- /* Wait for the next buffer to become available */
- bh = common->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common, false);
- if (rc)
- return rc;
- }
-
- /*
- * If we were asked to read past the end of file,
- * end with an empty buffer.
- */
- if (amount == 0) {
- curlun->sense_data =
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- bh->inreq->length = 0;
- bh->state = BUF_STATE_FULL;
- break;
- }
-
- /* Perform the read */
- file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *)bh->buf,
- amount, &file_offset_tmp);
- VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
- (unsigned long long)file_offset, (int)nread);
- if (signal_pending(current))
- return -EINTR;
-
- if (nread < 0) {
- LDBG(curlun, "error in file read: %d\n", (int)nread);
- nread = 0;
- } else if (nread < amount) {
- LDBG(curlun, "partial file read: %d/%u\n",
- (int)nread, amount);
- nread = round_down(nread, curlun->blksize);
- }
- file_offset += nread;
- amount_left -= nread;
- common->residue -= nread;
-
- /*
- * Except at the end of the transfer, nread will be
- * equal to the buffer size, which is divisible by the
- * bulk-in maxpacket size.
- */
- bh->inreq->length = nread;
- bh->state = BUF_STATE_FULL;
-
- /* If an error occurred, report it and its position */
- if (nread < amount) {
- curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- if (amount_left == 0)
- break; /* No more left to read */
-
- /* Send this buffer and go read some more */
- bh->inreq->zero = 0;
- if (!start_in_transfer(common, bh))
- /* Don't know what to do if common->fsg is NULL */
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
- }
-
- return -EIO; /* No default reply */
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_write(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba;
- struct fsg_buffhd *bh;
- int get_some_more;
- u32 amount_left_to_req, amount_left_to_write;
- loff_t usb_offset, file_offset, file_offset_tmp;
- unsigned int amount;
- ssize_t nwritten;
- int rc;
-
- if (curlun->ro) {
- curlun->sense_data = SS_WRITE_PROTECTED;
- return -EINVAL;
- }
- spin_lock(&curlun->filp->f_lock);
- curlun->filp->f_flags &= ~O_SYNC; /* Default is not to wait */
- spin_unlock(&curlun->filp->f_lock);
-
- /*
- * Get the starting Logical Block Address and check that it's
- * not too big
- */
- if (common->cmnd[0] == WRITE_6)
- lba = get_unaligned_be24(&common->cmnd[1]);
- else {
- lba = get_unaligned_be32(&common->cmnd[2]);
-
- /*
- * We allow DPO (Disable Page Out = don't save data in the
- * cache) and FUA (Force Unit Access = write directly to the
- * medium). We don't implement DPO; we implement FUA by
- * performing synchronous output.
- */
- if (common->cmnd[1] & ~0x18) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- if (!curlun->nofua && (common->cmnd[1] & 0x08)) { /* FUA */
- spin_lock(&curlun->filp->f_lock);
- curlun->filp->f_flags |= O_SYNC;
- spin_unlock(&curlun->filp->f_lock);
- }
- }
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
-
- /* Carry out the file writes */
- get_some_more = 1;
- file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits;
- amount_left_to_req = common->data_size_from_cmnd;
- amount_left_to_write = common->data_size_from_cmnd;
-
- while (amount_left_to_write > 0) {
-
- /* Queue a request for more data from the host */
- bh = common->next_buffhd_to_fill;
- if (bh->state == BUF_STATE_EMPTY && get_some_more) {
-
- /*
- * Figure out how much we want to get:
- * Try to get the remaining amount,
- * but not more than the buffer size.
- */
- amount = min(amount_left_to_req, FSG_BUFLEN);
-
- /* Beyond the end of the backing file? */
- if (usb_offset >= curlun->file_length) {
- get_some_more = 0;
- curlun->sense_data =
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- curlun->sense_data_info =
- usb_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- continue;
- }
-
- /* Get the next buffer */
- usb_offset += amount;
- common->usb_amount_left -= amount;
- amount_left_to_req -= amount;
- if (amount_left_to_req == 0)
- get_some_more = 0;
-
- /*
- * Except at the end of the transfer, amount will be
- * equal to the buffer size, which is divisible by
- * the bulk-out maxpacket size.
- */
- set_bulk_out_req_length(common, bh, amount);
- if (!start_out_transfer(common, bh))
- /* Dunno what to do if common->fsg is NULL */
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
- continue;
- }
-
- /* Write the received data to the backing file */
- bh = common->next_buffhd_to_drain;
- if (bh->state == BUF_STATE_EMPTY && !get_some_more)
- break; /* We stopped early */
- if (bh->state == BUF_STATE_FULL) {
- smp_rmb();
- common->next_buffhd_to_drain = bh->next;
- bh->state = BUF_STATE_EMPTY;
-
- /* Did something go wrong with the transfer? */
- if (bh->outreq->status != 0) {
- curlun->sense_data = SS_COMMUNICATION_FAILURE;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- amount = bh->outreq->actual;
- if (curlun->file_length - file_offset < amount) {
- LERROR(curlun,
- "write %u @ %llu beyond end %llu\n",
- amount, (unsigned long long)file_offset,
- (unsigned long long)curlun->file_length);
- amount = curlun->file_length - file_offset;
- }
-
- /* Don't accept excess data. The spec doesn't say
- * what to do in this case. We'll ignore the error.
- */
- amount = min(amount, bh->bulk_out_intended_length);
-
- /* Don't write a partial block */
- amount = round_down(amount, curlun->blksize);
- if (amount == 0)
- goto empty_write;
-
- /* Perform the write */
- file_offset_tmp = file_offset;
- nwritten = vfs_write(curlun->filp,
- (char __user *)bh->buf,
- amount, &file_offset_tmp);
- VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
- (unsigned long long)file_offset, (int)nwritten);
- if (signal_pending(current))
- return -EINTR; /* Interrupted! */
-
- if (nwritten < 0) {
- LDBG(curlun, "error in file write: %d\n",
- (int)nwritten);
- nwritten = 0;
- } else if (nwritten < amount) {
- LDBG(curlun, "partial file write: %d/%u\n",
- (int)nwritten, amount);
- nwritten = round_down(nwritten, curlun->blksize);
- }
- file_offset += nwritten;
- amount_left_to_write -= nwritten;
- common->residue -= nwritten;
-
- /* If an error occurred, report it and its position */
- if (nwritten < amount) {
- curlun->sense_data = SS_WRITE_ERROR;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- empty_write:
- /* Did the host decide to stop early? */
- if (bh->outreq->actual < bh->bulk_out_intended_length) {
- common->short_packet_received = 1;
- break;
- }
- continue;
- }
-
- /* Wait for something to happen */
- rc = sleep_thread(common, false);
- if (rc)
- return rc;
- }
-
- return -EIO; /* No default reply */
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_synchronize_cache(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- int rc;
-
- /* We ignore the requested LBA and write out all file's
- * dirty data buffers. */
- rc = fsg_lun_fsync_sub(curlun);
- if (rc)
- curlun->sense_data = SS_WRITE_ERROR;
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static void invalidate_sub(struct fsg_lun *curlun)
-{
- struct file *filp = curlun->filp;
- struct inode *inode = file_inode(filp);
- unsigned long rc;
-
- rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
- VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
-}
-
-static int do_verify(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba;
- u32 verification_length;
- struct fsg_buffhd *bh = common->next_buffhd_to_fill;
- loff_t file_offset, file_offset_tmp;
- u32 amount_left;
- unsigned int amount;
- ssize_t nread;
-
- /*
- * Get the starting Logical Block Address and check that it's
- * not too big.
- */
- lba = get_unaligned_be32(&common->cmnd[2]);
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
-
- /*
- * We allow DPO (Disable Page Out = don't save data in the
- * cache) but we don't implement it.
- */
- if (common->cmnd[1] & ~0x10) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- verification_length = get_unaligned_be16(&common->cmnd[7]);
- if (unlikely(verification_length == 0))
- return -EIO; /* No default reply */
-
- /* Prepare to carry out the file verify */
- amount_left = verification_length << curlun->blkbits;
- file_offset = ((loff_t) lba) << curlun->blkbits;
-
- /* Write out all the dirty buffers before invalidating them */
- fsg_lun_fsync_sub(curlun);
- if (signal_pending(current))
- return -EINTR;
-
- invalidate_sub(curlun);
- if (signal_pending(current))
- return -EINTR;
-
- /* Just try to read the requested blocks */
- while (amount_left > 0) {
- /*
- * Figure out how much we need to read:
- * Try to read the remaining amount, but not more than
- * the buffer size.
- * And don't try to read past the end of the file.
- */
- amount = min(amount_left, FSG_BUFLEN);
- amount = min((loff_t)amount,
- curlun->file_length - file_offset);
- if (amount == 0) {
- curlun->sense_data =
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- /* Perform the read */
- file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *) bh->buf,
- amount, &file_offset_tmp);
- VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
- (unsigned long long) file_offset,
- (int) nread);
- if (signal_pending(current))
- return -EINTR;
-
- if (nread < 0) {
- LDBG(curlun, "error in file verify: %d\n", (int)nread);
- nread = 0;
- } else if (nread < amount) {
- LDBG(curlun, "partial file verify: %d/%u\n",
- (int)nread, amount);
- nread = round_down(nread, curlun->blksize);
- }
- if (nread == 0) {
- curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
- file_offset += nread;
- amount_left -= nread;
- }
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u8 *buf = (u8 *) bh->buf;
-
- if (!curlun) { /* Unsupported LUNs are okay */
- common->bad_lun_okay = 1;
- memset(buf, 0, 36);
- buf[0] = 0x7f; /* Unsupported, no device-type */
- buf[4] = 31; /* Additional length */
- return 36;
- }
-
- buf[0] = curlun->cdrom ? TYPE_ROM : TYPE_DISK;
- buf[1] = curlun->removable ? 0x80 : 0;
- buf[2] = 2; /* ANSI SCSI level 2 */
- buf[3] = 2; /* SCSI-2 INQUIRY data format */
- buf[4] = 31; /* Additional length */
- buf[5] = 0; /* No special options */
- buf[6] = 0;
- buf[7] = 0;
- memcpy(buf + 8, common->inquiry_string, sizeof common->inquiry_string);
- return 36;
-}
-
-static int do_request_sense(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u8 *buf = (u8 *) bh->buf;
- u32 sd, sdinfo;
- int valid;
-
- /*
- * From the SCSI-2 spec., section 7.9 (Unit attention condition):
- *
- * If a REQUEST SENSE command is received from an initiator
- * with a pending unit attention condition (before the target
- * generates the contingent allegiance condition), then the
- * target shall either:
- * a) report any pending sense data and preserve the unit
- * attention condition on the logical unit, or,
- * b) report the unit attention condition, may discard any
- * pending sense data, and clear the unit attention
- * condition on the logical unit for that initiator.
- *
- * FSG normally uses option a); enable this code to use option b).
- */
-#if 0
- if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
- curlun->sense_data = curlun->unit_attention_data;
- curlun->unit_attention_data = SS_NO_SENSE;
- }
-#endif
-
- if (!curlun) { /* Unsupported LUNs are okay */
- common->bad_lun_okay = 1;
- sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
- sdinfo = 0;
- valid = 0;
- } else {
- sd = curlun->sense_data;
- sdinfo = curlun->sense_data_info;
- valid = curlun->info_valid << 7;
- curlun->sense_data = SS_NO_SENSE;
- curlun->sense_data_info = 0;
- curlun->info_valid = 0;
- }
-
- memset(buf, 0, 18);
- buf[0] = valid | 0x70; /* Valid, current error */
- buf[2] = SK(sd);
- put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */
- buf[7] = 18 - 8; /* Additional sense length */
- buf[12] = ASC(sd);
- buf[13] = ASCQ(sd);
- return 18;
-}
-
-static int do_read_capacity(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba = get_unaligned_be32(&common->cmnd[2]);
- int pmi = common->cmnd[8];
- u8 *buf = (u8 *)bh->buf;
-
- /* Check the PMI and LBA fields */
- if (pmi > 1 || (pmi == 0 && lba != 0)) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- put_unaligned_be32(curlun->num_sectors - 1, &buf[0]);
- /* Max logical block */
- put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */
- return 8;
-}
-
-static int do_read_header(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- int msf = common->cmnd[1] & 0x02;
- u32 lba = get_unaligned_be32(&common->cmnd[2]);
- u8 *buf = (u8 *)bh->buf;
-
- if (common->cmnd[1] & ~0x02) { /* Mask away MSF */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
-
- memset(buf, 0, 8);
- buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */
- store_cdrom_address(&buf[4], msf, lba);
- return 8;
-}
-
-static int do_read_toc(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- int msf = common->cmnd[1] & 0x02;
- int start_track = common->cmnd[6];
- u8 *buf = (u8 *)bh->buf;
-
- if ((common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
- start_track > 1) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- memset(buf, 0, 20);
- buf[1] = (20-2); /* TOC data length */
- buf[2] = 1; /* First track number */
- buf[3] = 1; /* Last track number */
- buf[5] = 0x16; /* Data track, copying allowed */
- buf[6] = 0x01; /* Only track is number 1 */
- store_cdrom_address(&buf[8], msf, 0);
-
- buf[13] = 0x16; /* Lead-out track is data */
- buf[14] = 0xAA; /* Lead-out track number */
- store_cdrom_address(&buf[16], msf, curlun->num_sectors);
- return 20;
-}
-
-static int do_mode_sense(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- int mscmnd = common->cmnd[0];
- u8 *buf = (u8 *) bh->buf;
- u8 *buf0 = buf;
- int pc, page_code;
- int changeable_values, all_pages;
- int valid_page = 0;
- int len, limit;
-
- if ((common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- pc = common->cmnd[2] >> 6;
- page_code = common->cmnd[2] & 0x3f;
- if (pc == 3) {
- curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
- return -EINVAL;
- }
- changeable_values = (pc == 1);
- all_pages = (page_code == 0x3f);
-
- /*
- * Write the mode parameter header. Fixed values are: default
- * medium type, no cache control (DPOFUA), and no block descriptors.
- * The only variable value is the WriteProtect bit. We will fill in
- * the mode data length later.
- */
- memset(buf, 0, 8);
- if (mscmnd == MODE_SENSE) {
- buf[2] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
- buf += 4;
- limit = 255;
- } else { /* MODE_SENSE_10 */
- buf[3] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
- buf += 8;
- limit = 65535; /* Should really be FSG_BUFLEN */
- }
-
- /* No block descriptors */
-
- /*
- * The mode pages, in numerical order. The only page we support
- * is the Caching page.
- */
- if (page_code == 0x08 || all_pages) {
- valid_page = 1;
- buf[0] = 0x08; /* Page code */
- buf[1] = 10; /* Page length */
- memset(buf+2, 0, 10); /* None of the fields are changeable */
-
- if (!changeable_values) {
- buf[2] = 0x04; /* Write cache enable, */
- /* Read cache not disabled */
- /* No cache retention priorities */
- put_unaligned_be16(0xffff, &buf[4]);
- /* Don't disable prefetch */
- /* Minimum prefetch = 0 */
- put_unaligned_be16(0xffff, &buf[8]);
- /* Maximum prefetch */
- put_unaligned_be16(0xffff, &buf[10]);
- /* Maximum prefetch ceiling */
- }
- buf += 12;
- }
-
- /*
- * Check that a valid page was requested and the mode data length
- * isn't too long.
- */
- len = buf - buf0;
- if (!valid_page || len > limit) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- /* Store the mode data length */
- if (mscmnd == MODE_SENSE)
- buf0[0] = len - 1;
- else
- put_unaligned_be16(len - 2, buf0);
- return len;
-}
-
-static int do_start_stop(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- int loej, start;
-
- if (!curlun) {
- return -EINVAL;
- } else if (!curlun->removable) {
- curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
- } else if ((common->cmnd[1] & ~0x01) != 0 || /* Mask away Immed */
- (common->cmnd[4] & ~0x03) != 0) { /* Mask LoEj, Start */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- loej = common->cmnd[4] & 0x02;
- start = common->cmnd[4] & 0x01;
-
- /*
- * Our emulation doesn't support mounting; the medium is
- * available for use as soon as it is loaded.
- */
- if (start) {
- if (!fsg_lun_is_open(curlun)) {
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
- return -EINVAL;
- }
- return 0;
- }
-
- /* Are we allowed to unload the media? */
- if (curlun->prevent_medium_removal) {
- LDBG(curlun, "unload attempt prevented\n");
- curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
- return -EINVAL;
- }
-
- if (!loej)
- return 0;
-
- up_read(&common->filesem);
- down_write(&common->filesem);
- fsg_lun_close(curlun);
- up_write(&common->filesem);
- down_read(&common->filesem);
-
- return 0;
-}
-
-static int do_prevent_allow(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- int prevent;
-
- if (!common->curlun) {
- return -EINVAL;
- } else if (!common->curlun->removable) {
- common->curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
- }
-
- prevent = common->cmnd[4] & 0x01;
- if ((common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- if (curlun->prevent_medium_removal && !prevent)
- fsg_lun_fsync_sub(curlun);
- curlun->prevent_medium_removal = prevent;
- return 0;
-}
-
-static int do_read_format_capacities(struct fsg_common *common,
- struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u8 *buf = (u8 *) bh->buf;
-
- buf[0] = buf[1] = buf[2] = 0;
- buf[3] = 8; /* Only the Current/Maximum Capacity Descriptor */
- buf += 4;
-
- put_unaligned_be32(curlun->num_sectors, &buf[0]);
- /* Number of blocks */
- put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */
- buf[4] = 0x02; /* Current capacity */
- return 12;
-}
-
-static int do_mode_select(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
-
- /* We don't support MODE SELECT */
- if (curlun)
- curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int halt_bulk_in_endpoint(struct fsg_dev *fsg)
-{
- int rc;
-
- rc = fsg_set_halt(fsg, fsg->bulk_in);
- if (rc == -EAGAIN)
- VDBG(fsg, "delayed bulk-in endpoint halt\n");
- while (rc != 0) {
- if (rc != -EAGAIN) {
- WARNING(fsg, "usb_ep_set_halt -> %d\n", rc);
- rc = 0;
- break;
- }
-
- /* Wait for a short time and then try again */
- if (msleep_interruptible(100) != 0)
- return -EINTR;
- rc = usb_ep_set_halt(fsg->bulk_in);
- }
- return rc;
-}
-
-static int wedge_bulk_in_endpoint(struct fsg_dev *fsg)
-{
- int rc;
-
- DBG(fsg, "bulk-in set wedge\n");
- rc = usb_ep_set_wedge(fsg->bulk_in);
- if (rc == -EAGAIN)
- VDBG(fsg, "delayed bulk-in endpoint wedge\n");
- while (rc != 0) {
- if (rc != -EAGAIN) {
- WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc);
- rc = 0;
- break;
- }
-
- /* Wait for a short time and then try again */
- if (msleep_interruptible(100) != 0)
- return -EINTR;
- rc = usb_ep_set_wedge(fsg->bulk_in);
- }
- return rc;
-}
-
-static int throw_away_data(struct fsg_common *common)
-{
- struct fsg_buffhd *bh;
- u32 amount;
- int rc;
-
- for (bh = common->next_buffhd_to_drain;
- bh->state != BUF_STATE_EMPTY || common->usb_amount_left > 0;
- bh = common->next_buffhd_to_drain) {
-
- /* Throw away the data in a filled buffer */
- if (bh->state == BUF_STATE_FULL) {
- smp_rmb();
- bh->state = BUF_STATE_EMPTY;
- common->next_buffhd_to_drain = bh->next;
-
- /* A short packet or an error ends everything */
- if (bh->outreq->actual < bh->bulk_out_intended_length ||
- bh->outreq->status != 0) {
- raise_exception(common,
- FSG_STATE_ABORT_BULK_OUT);
- return -EINTR;
- }
- continue;
- }
-
- /* Try to submit another request if we need one */
- bh = common->next_buffhd_to_fill;
- if (bh->state == BUF_STATE_EMPTY
- && common->usb_amount_left > 0) {
- amount = min(common->usb_amount_left, FSG_BUFLEN);
-
- /*
- * Except at the end of the transfer, amount will be
- * equal to the buffer size, which is divisible by
- * the bulk-out maxpacket size.
- */
- set_bulk_out_req_length(common, bh, amount);
- if (!start_out_transfer(common, bh))
- /* Dunno what to do if common->fsg is NULL */
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
- common->usb_amount_left -= amount;
- continue;
- }
-
- /* Otherwise wait for something to happen */
- rc = sleep_thread(common, true);
- if (rc)
- return rc;
- }
- return 0;
-}
-
-static int finish_reply(struct fsg_common *common)
-{
- struct fsg_buffhd *bh = common->next_buffhd_to_fill;
- int rc = 0;
-
- switch (common->data_dir) {
- case DATA_DIR_NONE:
- break; /* Nothing to send */
-
- /*
- * If we don't know whether the host wants to read or write,
- * this must be CB or CBI with an unknown command. We mustn't
- * try to send or receive any data. So stall both bulk pipes
- * if we can and wait for a reset.
- */
- case DATA_DIR_UNKNOWN:
- if (!common->can_stall) {
- /* Nothing */
- } else if (fsg_is_set(common)) {
- fsg_set_halt(common->fsg, common->fsg->bulk_out);
- rc = halt_bulk_in_endpoint(common->fsg);
- } else {
- /* Don't know what to do if common->fsg is NULL */
- rc = -EIO;
- }
- break;
-
- /* All but the last buffer of data must have already been sent */
- case DATA_DIR_TO_HOST:
- if (common->data_size == 0) {
- /* Nothing to send */
-
- /* Don't know what to do if common->fsg is NULL */
- } else if (!fsg_is_set(common)) {
- rc = -EIO;
-
- /* If there's no residue, simply send the last buffer */
- } else if (common->residue == 0) {
- bh->inreq->zero = 0;
- if (!start_in_transfer(common, bh))
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
-
- /*
- * For Bulk-only, mark the end of the data with a short
- * packet. If we are allowed to stall, halt the bulk-in
- * endpoint. (Note: This violates the Bulk-Only Transport
- * specification, which requires us to pad the data if we
- * don't halt the endpoint. Presumably nobody will mind.)
- */
- } else {
- bh->inreq->zero = 1;
- if (!start_in_transfer(common, bh))
- rc = -EIO;
- common->next_buffhd_to_fill = bh->next;
- if (common->can_stall)
- rc = halt_bulk_in_endpoint(common->fsg);
- }
- break;
-
- /*
- * We have processed all we want from the data the host has sent.
- * There may still be outstanding bulk-out requests.
- */
- case DATA_DIR_FROM_HOST:
- if (common->residue == 0) {
- /* Nothing to receive */
-
- /* Did the host stop sending unexpectedly early? */
- } else if (common->short_packet_received) {
- raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
- rc = -EINTR;
-
- /*
- * We haven't processed all the incoming data. Even though
- * we may be allowed to stall, doing so would cause a race.
- * The controller may already have ACK'ed all the remaining
- * bulk-out packets, in which case the host wouldn't see a
- * STALL. Not realizing the endpoint was halted, it wouldn't
- * clear the halt -- leading to problems later on.
- */
-#if 0
- } else if (common->can_stall) {
- if (fsg_is_set(common))
- fsg_set_halt(common->fsg,
- common->fsg->bulk_out);
- raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
- rc = -EINTR;
-#endif
-
- /*
- * We can't stall. Read in the excess data and throw it
- * all away.
- */
- } else {
- rc = throw_away_data(common);
- }
- break;
- }
- return rc;
-}
-
-static int send_status(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- struct fsg_buffhd *bh;
- struct bulk_cs_wrap *csw;
- int rc;
- u8 status = US_BULK_STAT_OK;
- u32 sd, sdinfo = 0;
-
- /* Wait for the next buffer to become available */
- bh = common->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common, true);
- if (rc)
- return rc;
- }
-
- if (curlun) {
- sd = curlun->sense_data;
- sdinfo = curlun->sense_data_info;
- } else if (common->bad_lun_okay)
- sd = SS_NO_SENSE;
- else
- sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
-
- if (common->phase_error) {
- DBG(common, "sending phase-error status\n");
- status = US_BULK_STAT_PHASE;
- sd = SS_INVALID_COMMAND;
- } else if (sd != SS_NO_SENSE) {
- DBG(common, "sending command-failure status\n");
- status = US_BULK_STAT_FAIL;
- VDBG(common, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
- " info x%x\n",
- SK(sd), ASC(sd), ASCQ(sd), sdinfo);
- }
-
- /* Store and send the Bulk-only CSW */
- csw = (void *)bh->buf;
-
- csw->Signature = cpu_to_le32(US_BULK_CS_SIGN);
- csw->Tag = common->tag;
- csw->Residue = cpu_to_le32(common->residue);
- csw->Status = status;
-
- bh->inreq->length = US_BULK_CS_WRAP_LEN;
- bh->inreq->zero = 0;
- if (!start_in_transfer(common, bh))
- /* Don't know what to do if common->fsg is NULL */
- return -EIO;
-
- common->next_buffhd_to_fill = bh->next;
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Check whether the command is properly formed and whether its data size
- * and direction agree with the values we already have.
- */
-static int check_command(struct fsg_common *common, int cmnd_size,
- enum data_direction data_dir, unsigned int mask,
- int needs_medium, const char *name)
-{
- int i;
- unsigned int lun = common->cmnd[1] >> 5;
- static const char dirletter[4] = {'u', 'o', 'i', 'n'};
- char hdlen[20];
- struct fsg_lun *curlun;
-
- hdlen[0] = 0;
- if (common->data_dir != DATA_DIR_UNKNOWN)
- sprintf(hdlen, ", H%c=%u", dirletter[(int) common->data_dir],
- common->data_size);
- VDBG(common, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
- name, cmnd_size, dirletter[(int) data_dir],
- common->data_size_from_cmnd, common->cmnd_size, hdlen);
-
- /*
- * We can't reply at all until we know the correct data direction
- * and size.
- */
- if (common->data_size_from_cmnd == 0)
- data_dir = DATA_DIR_NONE;
- if (common->data_size < common->data_size_from_cmnd) {
- /*
- * Host data size < Device data size is a phase error.
- * Carry out the command, but only transfer as much as
- * we are allowed.
- */
- common->data_size_from_cmnd = common->data_size;
- common->phase_error = 1;
- }
- common->residue = common->data_size;
- common->usb_amount_left = common->data_size;
-
- /* Conflicting data directions is a phase error */
- if (common->data_dir != data_dir && common->data_size_from_cmnd > 0) {
- common->phase_error = 1;
- return -EINVAL;
- }
-
- /* Verify the length of the command itself */
- if (cmnd_size != common->cmnd_size) {
-
- /*
- * Special case workaround: There are plenty of buggy SCSI
- * implementations. Many have issues with cbw->Length
- * field passing a wrong command size. For those cases we
- * always try to work around the problem by using the length
- * sent by the host side provided it is at least as large
- * as the correct command length.
- * Examples of such cases would be MS-Windows, which issues
- * REQUEST SENSE with cbw->Length == 12 where it should
- * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and
- * REQUEST SENSE with cbw->Length == 10 where it should
- * be 6 as well.
- */
- if (cmnd_size <= common->cmnd_size) {
- DBG(common, "%s is buggy! Expected length %d "
- "but we got %d\n", name,
- cmnd_size, common->cmnd_size);
- cmnd_size = common->cmnd_size;
- } else {
- common->phase_error = 1;
- return -EINVAL;
- }
- }
-
- /* Check that the LUN values are consistent */
- if (common->lun != lun)
- DBG(common, "using LUN %u from CBW, not LUN %u from CDB\n",
- common->lun, lun);
-
- /* Check the LUN */
- curlun = common->curlun;
- if (curlun) {
- if (common->cmnd[0] != REQUEST_SENSE) {
- curlun->sense_data = SS_NO_SENSE;
- curlun->sense_data_info = 0;
- curlun->info_valid = 0;
- }
- } else {
- common->bad_lun_okay = 0;
-
- /*
- * INQUIRY and REQUEST SENSE commands are explicitly allowed
- * to use unsupported LUNs; all others may not.
- */
- if (common->cmnd[0] != INQUIRY &&
- common->cmnd[0] != REQUEST_SENSE) {
- DBG(common, "unsupported LUN %u\n", common->lun);
- return -EINVAL;
- }
- }
-
- /*
- * If a unit attention condition exists, only INQUIRY and
- * REQUEST SENSE commands are allowed; anything else must fail.
- */
- if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
- common->cmnd[0] != INQUIRY &&
- common->cmnd[0] != REQUEST_SENSE) {
- curlun->sense_data = curlun->unit_attention_data;
- curlun->unit_attention_data = SS_NO_SENSE;
- return -EINVAL;
- }
-
- /* Check that only command bytes listed in the mask are non-zero */
- common->cmnd[1] &= 0x1f; /* Mask away the LUN */
- for (i = 1; i < cmnd_size; ++i) {
- if (common->cmnd[i] && !(mask & (1 << i))) {
- if (curlun)
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- }
-
- /* If the medium isn't mounted and the command needs to access
- * it, return an error. */
- if (curlun && !fsg_lun_is_open(curlun) && needs_medium) {
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
- return -EINVAL;
- }
-
- return 0;
-}
-
-/* wrapper of check_command for data size in blocks handling */
-static int check_command_size_in_blocks(struct fsg_common *common,
- int cmnd_size, enum data_direction data_dir,
- unsigned int mask, int needs_medium, const char *name)
-{
- if (common->curlun)
- common->data_size_from_cmnd <<= common->curlun->blkbits;
- return check_command(common, cmnd_size, data_dir,
- mask, needs_medium, name);
-}
-
-static int do_scsi_command(struct fsg_common *common)
-{
- struct fsg_buffhd *bh;
- int rc;
- int reply = -EINVAL;
- int i;
- static char unknown[16];
-
- dump_cdb(common);
-
- /* Wait for the next buffer to become available for data or status */
- bh = common->next_buffhd_to_fill;
- common->next_buffhd_to_drain = bh;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common, true);
- if (rc)
- return rc;
- }
- common->phase_error = 0;
- common->short_packet_received = 0;
-
- down_read(&common->filesem); /* We're using the backing file */
- switch (common->cmnd[0]) {
-
- case INQUIRY:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_TO_HOST,
- (1<<4), 0,
- "INQUIRY");
- if (reply == 0)
- reply = do_inquiry(common, bh);
- break;
-
- case MODE_SELECT:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_FROM_HOST,
- (1<<1) | (1<<4), 0,
- "MODE SELECT(6)");
- if (reply == 0)
- reply = do_mode_select(common, bh);
- break;
-
- case MODE_SELECT_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_FROM_HOST,
- (1<<1) | (3<<7), 0,
- "MODE SELECT(10)");
- if (reply == 0)
- reply = do_mode_select(common, bh);
- break;
-
- case MODE_SENSE:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_TO_HOST,
- (1<<1) | (1<<2) | (1<<4), 0,
- "MODE SENSE(6)");
- if (reply == 0)
- reply = do_mode_sense(common, bh);
- break;
-
- case MODE_SENSE_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (1<<1) | (1<<2) | (3<<7), 0,
- "MODE SENSE(10)");
- if (reply == 0)
- reply = do_mode_sense(common, bh);
- break;
-
- case ALLOW_MEDIUM_REMOVAL:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 6, DATA_DIR_NONE,
- (1<<4), 0,
- "PREVENT-ALLOW MEDIUM REMOVAL");
- if (reply == 0)
- reply = do_prevent_allow(common);
- break;
-
- case READ_6:
- i = common->cmnd[4];
- common->data_size_from_cmnd = (i == 0) ? 256 : i;
- reply = check_command_size_in_blocks(common, 6,
- DATA_DIR_TO_HOST,
- (7<<1) | (1<<4), 1,
- "READ(6)");
- if (reply == 0)
- reply = do_read(common);
- break;
-
- case READ_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command_size_in_blocks(common, 10,
- DATA_DIR_TO_HOST,
- (1<<1) | (0xf<<2) | (3<<7), 1,
- "READ(10)");
- if (reply == 0)
- reply = do_read(common);
- break;
-
- case READ_12:
- common->data_size_from_cmnd =
- get_unaligned_be32(&common->cmnd[6]);
- reply = check_command_size_in_blocks(common, 12,
- DATA_DIR_TO_HOST,
- (1<<1) | (0xf<<2) | (0xf<<6), 1,
- "READ(12)");
- if (reply == 0)
- reply = do_read(common);
- break;
-
- case READ_CAPACITY:
- common->data_size_from_cmnd = 8;
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (0xf<<2) | (1<<8), 1,
- "READ CAPACITY");
- if (reply == 0)
- reply = do_read_capacity(common, bh);
- break;
-
- case READ_HEADER:
- if (!common->curlun || !common->curlun->cdrom)
- goto unknown_cmnd;
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (3<<7) | (0x1f<<1), 1,
- "READ HEADER");
- if (reply == 0)
- reply = do_read_header(common, bh);
- break;
-
- case READ_TOC:
- if (!common->curlun || !common->curlun->cdrom)
- goto unknown_cmnd;
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (7<<6) | (1<<1), 1,
- "READ TOC");
- if (reply == 0)
- reply = do_read_toc(common, bh);
- break;
-
- case READ_FORMAT_CAPACITIES:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (3<<7), 1,
- "READ FORMAT CAPACITIES");
- if (reply == 0)
- reply = do_read_format_capacities(common, bh);
- break;
-
- case REQUEST_SENSE:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_TO_HOST,
- (1<<4), 0,
- "REQUEST SENSE");
- if (reply == 0)
- reply = do_request_sense(common, bh);
- break;
-
- case START_STOP:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 6, DATA_DIR_NONE,
- (1<<1) | (1<<4), 0,
- "START-STOP UNIT");
- if (reply == 0)
- reply = do_start_stop(common);
- break;
-
- case SYNCHRONIZE_CACHE:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 10, DATA_DIR_NONE,
- (0xf<<2) | (3<<7), 1,
- "SYNCHRONIZE CACHE");
- if (reply == 0)
- reply = do_synchronize_cache(common);
- break;
-
- case TEST_UNIT_READY:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 6, DATA_DIR_NONE,
- 0, 1,
- "TEST UNIT READY");
- break;
-
- /*
- * Although optional, this command is used by MS-Windows. We
- * support a minimal version: BytChk must be 0.
- */
- case VERIFY:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 10, DATA_DIR_NONE,
- (1<<1) | (0xf<<2) | (3<<7), 1,
- "VERIFY");
- if (reply == 0)
- reply = do_verify(common);
- break;
-
- case WRITE_6:
- i = common->cmnd[4];
- common->data_size_from_cmnd = (i == 0) ? 256 : i;
- reply = check_command_size_in_blocks(common, 6,
- DATA_DIR_FROM_HOST,
- (7<<1) | (1<<4), 1,
- "WRITE(6)");
- if (reply == 0)
- reply = do_write(common);
- break;
-
- case WRITE_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command_size_in_blocks(common, 10,
- DATA_DIR_FROM_HOST,
- (1<<1) | (0xf<<2) | (3<<7), 1,
- "WRITE(10)");
- if (reply == 0)
- reply = do_write(common);
- break;
-
- case WRITE_12:
- common->data_size_from_cmnd =
- get_unaligned_be32(&common->cmnd[6]);
- reply = check_command_size_in_blocks(common, 12,
- DATA_DIR_FROM_HOST,
- (1<<1) | (0xf<<2) | (0xf<<6), 1,
- "WRITE(12)");
- if (reply == 0)
- reply = do_write(common);
- break;
-
- /*
- * Some mandatory commands that we recognize but don't implement.
- * They don't mean much in this setting. It's left as an exercise
- * for anyone interested to implement RESERVE and RELEASE in terms
- * of Posix locks.
- */
- case FORMAT_UNIT:
- case RELEASE:
- case RESERVE:
- case SEND_DIAGNOSTIC:
- /* Fall through */
-
- default:
-unknown_cmnd:
- common->data_size_from_cmnd = 0;
- sprintf(unknown, "Unknown x%02x", common->cmnd[0]);
- reply = check_command(common, common->cmnd_size,
- DATA_DIR_UNKNOWN, ~0, 0, unknown);
- if (reply == 0) {
- common->curlun->sense_data = SS_INVALID_COMMAND;
- reply = -EINVAL;
- }
- break;
- }
- up_read(&common->filesem);
-
- if (reply == -EINTR || signal_pending(current))
- return -EINTR;
-
- /* Set up the single reply buffer for finish_reply() */
- if (reply == -EINVAL)
- reply = 0; /* Error reply length */
- if (reply >= 0 && common->data_dir == DATA_DIR_TO_HOST) {
- reply = min((u32)reply, common->data_size_from_cmnd);
- bh->inreq->length = reply;
- bh->state = BUF_STATE_FULL;
- common->residue -= reply;
- } /* Otherwise it's already set */
-
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-{
- struct usb_request *req = bh->outreq;
- struct bulk_cb_wrap *cbw = req->buf;
- struct fsg_common *common = fsg->common;
-
- /* Was this a real packet? Should it be ignored? */
- if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
- return -EINVAL;
-
- /* Is the CBW valid? */
- if (req->actual != US_BULK_CB_WRAP_LEN ||
- cbw->Signature != cpu_to_le32(
- US_BULK_CB_SIGN)) {
- DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
- req->actual,
- le32_to_cpu(cbw->Signature));
-
- /*
- * The Bulk-only spec says we MUST stall the IN endpoint
- * (6.6.1), so it's unavoidable. It also says we must
- * retain this state until the next reset, but there's
- * no way to tell the controller driver it should ignore
- * Clear-Feature(HALT) requests.
- *
- * We aren't required to halt the OUT endpoint; instead
- * we can simply accept and discard any data received
- * until the next reset.
- */
- wedge_bulk_in_endpoint(fsg);
- set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
- return -EINVAL;
- }
-
- /* Is the CBW meaningful? */
- if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN ||
- cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) {
- DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
- "cmdlen %u\n",
- cbw->Lun, cbw->Flags, cbw->Length);
-
- /*
- * We can do anything we want here, so let's stall the
- * bulk pipes if we are allowed to.
- */
- if (common->can_stall) {
- fsg_set_halt(fsg, fsg->bulk_out);
- halt_bulk_in_endpoint(fsg);
- }
- return -EINVAL;
- }
-
- /* Save the command for later */
- common->cmnd_size = cbw->Length;
- memcpy(common->cmnd, cbw->CDB, common->cmnd_size);
- if (cbw->Flags & US_BULK_FLAG_IN)
- common->data_dir = DATA_DIR_TO_HOST;
- else
- common->data_dir = DATA_DIR_FROM_HOST;
- common->data_size = le32_to_cpu(cbw->DataTransferLength);
- if (common->data_size == 0)
- common->data_dir = DATA_DIR_NONE;
- common->lun = cbw->Lun;
- if (common->lun < common->nluns)
- common->curlun = common->luns[common->lun];
- else
- common->curlun = NULL;
- common->tag = cbw->Tag;
- return 0;
-}
-
-static int get_next_command(struct fsg_common *common)
-{
- struct fsg_buffhd *bh;
- int rc = 0;
-
- /* Wait for the next buffer to become available */
- bh = common->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common, true);
- if (rc)
- return rc;
- }
-
- /* Queue a request to read a Bulk-only CBW */
- set_bulk_out_req_length(common, bh, US_BULK_CB_WRAP_LEN);
- if (!start_out_transfer(common, bh))
- /* Don't know what to do if common->fsg is NULL */
- return -EIO;
-
- /*
- * We will drain the buffer in software, which means we
- * can reuse it for the next filling. No need to advance
- * next_buffhd_to_fill.
- */
-
- /* Wait for the CBW to arrive */
- while (bh->state != BUF_STATE_FULL) {
- rc = sleep_thread(common, true);
- if (rc)
- return rc;
- }
- smp_rmb();
- rc = fsg_is_set(common) ? received_cbw(common->fsg, bh) : -EIO;
- bh->state = BUF_STATE_EMPTY;
-
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int alloc_request(struct fsg_common *common, struct usb_ep *ep,
- struct usb_request **preq)
-{
- *preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
- if (*preq)
- return 0;
- ERROR(common, "can't allocate request for %s\n", ep->name);
- return -ENOMEM;
-}
-
-/* Reset interface setting and re-init endpoint state (toggle etc). */
-static int do_set_interface(struct fsg_common *common, struct fsg_dev *new_fsg)
-{
- struct fsg_dev *fsg;
- int i, rc = 0;
-
- if (common->running)
- DBG(common, "reset interface\n");
-
-reset:
- /* Deallocate the requests */
- if (common->fsg) {
- fsg = common->fsg;
-
- for (i = 0; i < common->fsg_num_buffers; ++i) {
- struct fsg_buffhd *bh = &common->buffhds[i];
-
- if (bh->inreq) {
- usb_ep_free_request(fsg->bulk_in, bh->inreq);
- bh->inreq = NULL;
- }
- if (bh->outreq) {
- usb_ep_free_request(fsg->bulk_out, bh->outreq);
- bh->outreq = NULL;
- }
- }
-
- /* Disable the endpoints */
- if (fsg->bulk_in_enabled) {
- usb_ep_disable(fsg->bulk_in);
- fsg->bulk_in->driver_data = NULL;
- fsg->bulk_in_enabled = 0;
- }
- if (fsg->bulk_out_enabled) {
- usb_ep_disable(fsg->bulk_out);
- fsg->bulk_out->driver_data = NULL;
- fsg->bulk_out_enabled = 0;
- }
-
- common->fsg = NULL;
- wake_up(&common->fsg_wait);
- }
-
- common->running = 0;
- if (!new_fsg || rc)
- return rc;
-
- common->fsg = new_fsg;
- fsg = common->fsg;
-
- /* Enable the endpoints */
- rc = config_ep_by_speed(common->gadget, &(fsg->function), fsg->bulk_in);
- if (rc)
- goto reset;
- rc = usb_ep_enable(fsg->bulk_in);
- if (rc)
- goto reset;
- fsg->bulk_in->driver_data = common;
- fsg->bulk_in_enabled = 1;
-
- rc = config_ep_by_speed(common->gadget, &(fsg->function),
- fsg->bulk_out);
- if (rc)
- goto reset;
- rc = usb_ep_enable(fsg->bulk_out);
- if (rc)
- goto reset;
- fsg->bulk_out->driver_data = common;
- fsg->bulk_out_enabled = 1;
- common->bulk_out_maxpacket = usb_endpoint_maxp(fsg->bulk_out->desc);
- clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
-
- /* Allocate the requests */
- for (i = 0; i < common->fsg_num_buffers; ++i) {
- struct fsg_buffhd *bh = &common->buffhds[i];
-
- rc = alloc_request(common, fsg->bulk_in, &bh->inreq);
- if (rc)
- goto reset;
- rc = alloc_request(common, fsg->bulk_out, &bh->outreq);
- if (rc)
- goto reset;
- bh->inreq->buf = bh->outreq->buf = bh->buf;
- bh->inreq->context = bh->outreq->context = bh;
- bh->inreq->complete = bulk_in_complete;
- bh->outreq->complete = bulk_out_complete;
- }
-
- common->running = 1;
- for (i = 0; i < common->nluns; ++i)
- if (common->luns[i])
- common->luns[i]->unit_attention_data =
- SS_RESET_OCCURRED;
- return rc;
-}
-
-
-/****************************** ALT CONFIGS ******************************/
-
-static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- fsg->common->new_fsg = fsg;
- raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
- return USB_GADGET_DELAYED_STATUS;
-}
-
-static void fsg_disable(struct usb_function *f)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- fsg->common->new_fsg = NULL;
- raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static void handle_exception(struct fsg_common *common)
-{
- siginfo_t info;
- int i;
- struct fsg_buffhd *bh;
- enum fsg_state old_state;
- struct fsg_lun *curlun;
- unsigned int exception_req_tag;
-
- /*
- * Clear the existing signals. Anything but SIGUSR1 is converted
- * into a high-priority EXIT exception.
- */
- for (;;) {
- int sig =
- dequeue_signal_lock(current, ¤t->blocked, &info);
- if (!sig)
- break;
- if (sig != SIGUSR1) {
- if (common->state < FSG_STATE_EXIT)
- DBG(common, "Main thread exiting on signal\n");
- raise_exception(common, FSG_STATE_EXIT);
- }
- }
-
- /* Cancel all the pending transfers */
- if (likely(common->fsg)) {
- for (i = 0; i < common->fsg_num_buffers; ++i) {
- bh = &common->buffhds[i];
- if (bh->inreq_busy)
- usb_ep_dequeue(common->fsg->bulk_in, bh->inreq);
- if (bh->outreq_busy)
- usb_ep_dequeue(common->fsg->bulk_out,
- bh->outreq);
- }
-
- /* Wait until everything is idle */
- for (;;) {
- int num_active = 0;
- for (i = 0; i < common->fsg_num_buffers; ++i) {
- bh = &common->buffhds[i];
- num_active += bh->inreq_busy + bh->outreq_busy;
- }
- if (num_active == 0)
- break;
- if (sleep_thread(common, true))
- return;
- }
-
- /* Clear out the controller's fifos */
- if (common->fsg->bulk_in_enabled)
- usb_ep_fifo_flush(common->fsg->bulk_in);
- if (common->fsg->bulk_out_enabled)
- usb_ep_fifo_flush(common->fsg->bulk_out);
- }
-
- /*
- * Reset the I/O buffer states and pointers, the SCSI
- * state, and the exception. Then invoke the handler.
- */
- spin_lock_irq(&common->lock);
-
- for (i = 0; i < common->fsg_num_buffers; ++i) {
- bh = &common->buffhds[i];
- bh->state = BUF_STATE_EMPTY;
- }
- common->next_buffhd_to_fill = &common->buffhds[0];
- common->next_buffhd_to_drain = &common->buffhds[0];
- exception_req_tag = common->exception_req_tag;
- old_state = common->state;
-
- if (old_state == FSG_STATE_ABORT_BULK_OUT)
- common->state = FSG_STATE_STATUS_PHASE;
- else {
- for (i = 0; i < common->nluns; ++i) {
- curlun = common->luns[i];
- if (!curlun)
- continue;
- curlun->prevent_medium_removal = 0;
- curlun->sense_data = SS_NO_SENSE;
- curlun->unit_attention_data = SS_NO_SENSE;
- curlun->sense_data_info = 0;
- curlun->info_valid = 0;
- }
- common->state = FSG_STATE_IDLE;
- }
- spin_unlock_irq(&common->lock);
-
- /* Carry out any extra actions required for the exception */
- switch (old_state) {
- case FSG_STATE_ABORT_BULK_OUT:
- send_status(common);
- spin_lock_irq(&common->lock);
- if (common->state == FSG_STATE_STATUS_PHASE)
- common->state = FSG_STATE_IDLE;
- spin_unlock_irq(&common->lock);
- break;
-
- case FSG_STATE_RESET:
- /*
- * In case we were forced against our will to halt a
- * bulk endpoint, clear the halt now. (The SuperH UDC
- * requires this.)
- */
- if (!fsg_is_set(common))
- break;
- if (test_and_clear_bit(IGNORE_BULK_OUT,
- &common->fsg->atomic_bitflags))
- usb_ep_clear_halt(common->fsg->bulk_in);
-
- if (common->ep0_req_tag == exception_req_tag)
- ep0_queue(common); /* Complete the status stage */
-
- /*
- * Technically this should go here, but it would only be
- * a waste of time. Ditto for the INTERFACE_CHANGE and
- * CONFIG_CHANGE cases.
- */
- /* for (i = 0; i < common->nluns; ++i) */
- /* if (common->luns[i]) */
- /* common->luns[i]->unit_attention_data = */
- /* SS_RESET_OCCURRED; */
- break;
-
- case FSG_STATE_CONFIG_CHANGE:
- do_set_interface(common, common->new_fsg);
- if (common->new_fsg)
- usb_composite_setup_continue(common->cdev);
- break;
-
- case FSG_STATE_EXIT:
- case FSG_STATE_TERMINATED:
- do_set_interface(common, NULL); /* Free resources */
- spin_lock_irq(&common->lock);
- common->state = FSG_STATE_TERMINATED; /* Stop the thread */
- spin_unlock_irq(&common->lock);
- break;
-
- case FSG_STATE_INTERFACE_CHANGE:
- case FSG_STATE_DISCONNECT:
- case FSG_STATE_COMMAND_PHASE:
- case FSG_STATE_DATA_PHASE:
- case FSG_STATE_STATUS_PHASE:
- case FSG_STATE_IDLE:
- break;
- }
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int fsg_main_thread(void *common_)
-{
- struct fsg_common *common = common_;
-
- /*
- * Allow the thread to be killed by a signal, but set the signal mask
- * to block everything but INT, TERM, KILL, and USR1.
- */
- allow_signal(SIGINT);
- allow_signal(SIGTERM);
- allow_signal(SIGKILL);
- allow_signal(SIGUSR1);
-
- /* Allow the thread to be frozen */
- set_freezable();
-
- /*
- * Arrange for userspace references to be interpreted as kernel
- * pointers. That way we can pass a kernel pointer to a routine
- * that expects a __user pointer and it will work okay.
- */
- set_fs(get_ds());
-
- /* The main loop */
- while (common->state != FSG_STATE_TERMINATED) {
- if (exception_in_progress(common) || signal_pending(current)) {
- handle_exception(common);
- continue;
- }
-
- if (!common->running) {
- sleep_thread(common, true);
- continue;
- }
-
- if (get_next_command(common))
- continue;
-
- spin_lock_irq(&common->lock);
- if (!exception_in_progress(common))
- common->state = FSG_STATE_DATA_PHASE;
- spin_unlock_irq(&common->lock);
-
- if (do_scsi_command(common) || finish_reply(common))
- continue;
-
- spin_lock_irq(&common->lock);
- if (!exception_in_progress(common))
- common->state = FSG_STATE_STATUS_PHASE;
- spin_unlock_irq(&common->lock);
-
- if (send_status(common))
- continue;
-
- spin_lock_irq(&common->lock);
- if (!exception_in_progress(common))
- common->state = FSG_STATE_IDLE;
- spin_unlock_irq(&common->lock);
- }
-
- spin_lock_irq(&common->lock);
- common->thread_task = NULL;
- spin_unlock_irq(&common->lock);
-
- if (!common->ops || !common->ops->thread_exits
- || common->ops->thread_exits(common) < 0) {
- struct fsg_lun **curlun_it = common->luns;
- unsigned i = common->nluns;
-
- down_write(&common->filesem);
- for (; i--; ++curlun_it) {
- struct fsg_lun *curlun = *curlun_it;
- if (!curlun || !fsg_lun_is_open(curlun))
- continue;
-
- fsg_lun_close(curlun);
- curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
- }
- up_write(&common->filesem);
- }
-
- /* Let fsg_unbind() know the thread has exited */
- complete_and_exit(&common->thread_notifier, 0);
-}
-
-
-/*************************** DEVICE ATTRIBUTES ***************************/
-
-static ssize_t ro_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
-
- return fsg_show_ro(curlun, buf);
-}
-
-static ssize_t nofua_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
-
- return fsg_show_nofua(curlun, buf);
-}
-
-static ssize_t file_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
-
- return fsg_show_file(curlun, filesem, buf);
-}
-
-static ssize_t ro_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
-
- return fsg_store_ro(curlun, filesem, buf, count);
-}
-
-static ssize_t nofua_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
-
- return fsg_store_nofua(curlun, buf, count);
-}
-
-static ssize_t file_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
-
- return fsg_store_file(curlun, filesem, buf, count);
-}
-
-static DEVICE_ATTR_RW(ro);
-static DEVICE_ATTR_RW(nofua);
-static DEVICE_ATTR_RW(file);
-
-static struct device_attribute dev_attr_ro_cdrom = __ATTR_RO(ro);
-static struct device_attribute dev_attr_file_nonremovable = __ATTR_RO(file);
-
-
-/****************************** FSG COMMON ******************************/
-
-static void fsg_common_release(struct kref *ref);
-
-static void fsg_lun_release(struct device *dev)
-{
- /* Nothing needs to be done */
-}
-
-void fsg_common_get(struct fsg_common *common)
-{
- kref_get(&common->ref);
-}
-EXPORT_SYMBOL_GPL(fsg_common_get);
-
-void fsg_common_put(struct fsg_common *common)
-{
- kref_put(&common->ref, fsg_common_release);
-}
-EXPORT_SYMBOL_GPL(fsg_common_put);
-
-/* check if fsg_num_buffers is within a valid range */
-static inline int fsg_num_buffers_validate(unsigned int fsg_num_buffers)
-{
- if (fsg_num_buffers >= 2 && fsg_num_buffers <= 4)
- return 0;
- pr_err("fsg_num_buffers %u is out of range (%d to %d)\n",
- fsg_num_buffers, 2, 4);
- return -EINVAL;
-}
-
-static struct fsg_common *fsg_common_setup(struct fsg_common *common)
-{
- if (!common) {
- common = kzalloc(sizeof(*common), GFP_KERNEL);
- if (!common)
- return ERR_PTR(-ENOMEM);
- common->free_storage_on_release = 1;
- } else {
- common->free_storage_on_release = 0;
- }
- init_rwsem(&common->filesem);
- spin_lock_init(&common->lock);
- kref_init(&common->ref);
- init_completion(&common->thread_notifier);
- init_waitqueue_head(&common->fsg_wait);
- common->state = FSG_STATE_TERMINATED;
-
- return common;
-}
-
-void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs)
-{
- common->sysfs = sysfs;
-}
-EXPORT_SYMBOL_GPL(fsg_common_set_sysfs);
-
-static void _fsg_common_free_buffers(struct fsg_buffhd *buffhds, unsigned n)
-{
- if (buffhds) {
- struct fsg_buffhd *bh = buffhds;
- while (n--) {
- kfree(bh->buf);
- ++bh;
- }
- kfree(buffhds);
- }
-}
-
-int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n)
-{
- struct fsg_buffhd *bh, *buffhds;
- int i, rc;
-
- rc = fsg_num_buffers_validate(n);
- if (rc != 0)
- return rc;
-
- buffhds = kcalloc(n, sizeof(*buffhds), GFP_KERNEL);
- if (!buffhds)
- return -ENOMEM;
-
- /* Data buffers cyclic list */
- bh = buffhds;
- i = n;
- goto buffhds_first_it;
- do {
- bh->next = bh + 1;
- ++bh;
-buffhds_first_it:
- bh->buf = kmalloc(FSG_BUFLEN, GFP_KERNEL);
- if (unlikely(!bh->buf))
- goto error_release;
- } while (--i);
- bh->next = buffhds;
-
- _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
- common->fsg_num_buffers = n;
- common->buffhds = buffhds;
-
- return 0;
-
-error_release:
- /*
- * "buf"s pointed to by heads after n - i are NULL
- * so releasing them won't hurt
- */
- _fsg_common_free_buffers(buffhds, n);
-
- return -ENOMEM;
-}
-EXPORT_SYMBOL_GPL(fsg_common_set_num_buffers);
-
-static inline void fsg_common_remove_sysfs(struct fsg_lun *lun)
-{
- device_remove_file(&lun->dev, &dev_attr_nofua);
- /*
- * device_remove_file() =>
- *
- * here the attr (e.g. dev_attr_ro) is only used to be passed to:
- *
- * sysfs_remove_file() =>
- *
- * here e.g. both dev_attr_ro_cdrom and dev_attr_ro are in
- * the same namespace and
- * from here only attr->name is passed to:
- *
- * sysfs_hash_and_remove()
- *
- * attr->name is the same for dev_attr_ro_cdrom and
- * dev_attr_ro
- * attr->name is the same for dev_attr_file and
- * dev_attr_file_nonremovable
- *
- * so we don't differentiate between removing e.g. dev_attr_ro_cdrom
- * and dev_attr_ro
- */
- device_remove_file(&lun->dev, &dev_attr_ro);
- device_remove_file(&lun->dev, &dev_attr_file);
-}
-
-void fsg_common_remove_lun(struct fsg_lun *lun, bool sysfs)
-{
- if (sysfs) {
- fsg_common_remove_sysfs(lun);
- device_unregister(&lun->dev);
- }
- fsg_lun_close(lun);
- kfree(lun);
-}
-EXPORT_SYMBOL_GPL(fsg_common_remove_lun);
-
-static void _fsg_common_remove_luns(struct fsg_common *common, int n)
-{
- int i;
-
- for (i = 0; i < n; ++i)
- if (common->luns[i]) {
- fsg_common_remove_lun(common->luns[i], common->sysfs);
- common->luns[i] = NULL;
- }
-}
-EXPORT_SYMBOL_GPL(fsg_common_remove_luns);
-
-void fsg_common_remove_luns(struct fsg_common *common)
-{
- _fsg_common_remove_luns(common, common->nluns);
-}
-
-void fsg_common_free_luns(struct fsg_common *common)
-{
- fsg_common_remove_luns(common);
- kfree(common->luns);
- common->luns = NULL;
-}
-EXPORT_SYMBOL_GPL(fsg_common_free_luns);
-
-int fsg_common_set_nluns(struct fsg_common *common, int nluns)
-{
- struct fsg_lun **curlun;
-
- /* Find out how many LUNs there should be */
- if (nluns < 1 || nluns > FSG_MAX_LUNS) {
- pr_err("invalid number of LUNs: %u\n", nluns);
- return -EINVAL;
- }
-
- curlun = kcalloc(nluns, sizeof(*curlun), GFP_KERNEL);
- if (unlikely(!curlun))
- return -ENOMEM;
-
- if (common->luns)
- fsg_common_free_luns(common);
-
- common->luns = curlun;
- common->nluns = nluns;
-
- pr_info("Number of LUNs=%d\n", common->nluns);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fsg_common_set_nluns);
-
-void fsg_common_set_ops(struct fsg_common *common,
- const struct fsg_operations *ops)
-{
- common->ops = ops;
-}
-EXPORT_SYMBOL_GPL(fsg_common_set_ops);
-
-void fsg_common_free_buffers(struct fsg_common *common)
-{
- _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
- common->buffhds = NULL;
-}
-EXPORT_SYMBOL_GPL(fsg_common_free_buffers);
-
-int fsg_common_set_cdev(struct fsg_common *common,
- struct usb_composite_dev *cdev, bool can_stall)
-{
- struct usb_string *us;
-
- common->gadget = cdev->gadget;
- common->ep0 = cdev->gadget->ep0;
- common->ep0req = cdev->req;
- common->cdev = cdev;
-
- us = usb_gstrings_attach(cdev, fsg_strings_array,
- ARRAY_SIZE(fsg_strings));
- if (IS_ERR(us))
- return PTR_ERR(us);
-
- fsg_intf_desc.iInterface = us[FSG_STRING_INTERFACE].id;
-
- /*
- * Some peripheral controllers are known not to be able to
- * halt bulk endpoints correctly. If one of them is present,
- * disable stalls.
- */
- common->can_stall = can_stall && !(gadget_is_at91(common->gadget));
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fsg_common_set_cdev);
-
-static inline int fsg_common_add_sysfs(struct fsg_common *common,
- struct fsg_lun *lun)
-{
- int rc;
-
- rc = device_register(&lun->dev);
- if (rc) {
- put_device(&lun->dev);
- return rc;
- }
-
- rc = device_create_file(&lun->dev,
- lun->cdrom
- ? &dev_attr_ro_cdrom
- : &dev_attr_ro);
- if (rc)
- goto error;
- rc = device_create_file(&lun->dev,
- lun->removable
- ? &dev_attr_file
- : &dev_attr_file_nonremovable);
- if (rc)
- goto error;
- rc = device_create_file(&lun->dev, &dev_attr_nofua);
- if (rc)
- goto error;
-
- return 0;
-
-error:
- /* removing nonexistent files is a no-op */
- fsg_common_remove_sysfs(lun);
- device_unregister(&lun->dev);
- return rc;
-}
-
-int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
- unsigned int id, const char *name,
- const char **name_pfx)
-{
- struct fsg_lun *lun;
- char *pathbuf, *p;
- int rc = -ENOMEM;
-
- if (!common->nluns || !common->luns)
- return -ENODEV;
-
- if (common->luns[id])
- return -EBUSY;
-
- if (!cfg->filename && !cfg->removable) {
- pr_err("no file given for LUN%d\n", id);
- return -EINVAL;
- }
-
- lun = kzalloc(sizeof(*lun), GFP_KERNEL);
- if (!lun)
- return -ENOMEM;
-
- lun->name_pfx = name_pfx;
-
- lun->cdrom = !!cfg->cdrom;
- lun->ro = cfg->cdrom || cfg->ro;
- lun->initially_ro = lun->ro;
- lun->removable = !!cfg->removable;
-
- if (!common->sysfs) {
- /* we DON'T own the name!*/
- lun->name = name;
- } else {
- lun->dev.release = fsg_lun_release;
- lun->dev.parent = &common->gadget->dev;
- dev_set_drvdata(&lun->dev, &common->filesem);
- dev_set_name(&lun->dev, "%s", name);
- lun->name = dev_name(&lun->dev);
-
- rc = fsg_common_add_sysfs(common, lun);
- if (rc) {
- pr_info("failed to register LUN%d: %d\n", id, rc);
- goto error_sysfs;
- }
- }
-
- common->luns[id] = lun;
-
- if (cfg->filename) {
- rc = fsg_lun_open(lun, cfg->filename);
- if (rc)
- goto error_lun;
- }
-
- pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
- p = "(no medium)";
- if (fsg_lun_is_open(lun)) {
- p = "(error)";
- if (pathbuf) {
- p = d_path(&lun->filp->f_path, pathbuf, PATH_MAX);
- if (IS_ERR(p))
- p = "(error)";
- }
- }
- pr_info("LUN: %s%s%sfile: %s\n",
- lun->removable ? "removable " : "",
- lun->ro ? "read only " : "",
- lun->cdrom ? "CD-ROM " : "",
- p);
- kfree(pathbuf);
-
- return 0;
-
-error_lun:
- if (common->sysfs) {
- fsg_common_remove_sysfs(lun);
- device_unregister(&lun->dev);
- }
- fsg_lun_close(lun);
- common->luns[id] = NULL;
-error_sysfs:
- kfree(lun);
- return rc;
-}
-EXPORT_SYMBOL_GPL(fsg_common_create_lun);
-
-int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg)
-{
- char buf[8]; /* enough for 100000000 different numbers, decimal */
- int i, rc;
-
- for (i = 0; i < common->nluns; ++i) {
- snprintf(buf, sizeof(buf), "lun%d", i);
- rc = fsg_common_create_lun(common, &cfg->luns[i], i, buf, NULL);
- if (rc)
- goto fail;
- }
-
- pr_info("Number of LUNs=%d\n", common->nluns);
-
- return 0;
-
-fail:
- _fsg_common_remove_luns(common, i);
- return rc;
-}
-EXPORT_SYMBOL_GPL(fsg_common_create_luns);
-
-void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
- const char *pn)
-{
- int i;
-
- /* Prepare inquiryString */
- i = get_default_bcdDevice();
- snprintf(common->inquiry_string, sizeof(common->inquiry_string),
- "%-8s%-16s%04x", vn ?: "Linux",
- /* Assume product name dependent on the first LUN */
- pn ?: ((*common->luns)->cdrom
- ? "File-CD Gadget"
- : "File-Stor Gadget"),
- i);
-}
-EXPORT_SYMBOL_GPL(fsg_common_set_inquiry_string);
-
-int fsg_common_run_thread(struct fsg_common *common)
-{
- common->state = FSG_STATE_IDLE;
- /* Tell the thread to start working */
- common->thread_task =
- kthread_create(fsg_main_thread, common, "file-storage");
- if (IS_ERR(common->thread_task)) {
- common->state = FSG_STATE_TERMINATED;
- return PTR_ERR(common->thread_task);
- }
-
- DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task));
-
- wake_up_process(common->thread_task);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fsg_common_run_thread);
-
-static void fsg_common_release(struct kref *ref)
-{
- struct fsg_common *common = container_of(ref, struct fsg_common, ref);
-
- /* If the thread isn't already dead, tell it to exit now */
- if (common->state != FSG_STATE_TERMINATED) {
- raise_exception(common, FSG_STATE_EXIT);
- wait_for_completion(&common->thread_notifier);
- }
-
- if (likely(common->luns)) {
- struct fsg_lun **lun_it = common->luns;
- unsigned i = common->nluns;
-
- /* In error recovery common->nluns may be zero. */
- for (; i; --i, ++lun_it) {
- struct fsg_lun *lun = *lun_it;
- if (!lun)
- continue;
- if (common->sysfs)
- fsg_common_remove_sysfs(lun);
- fsg_lun_close(lun);
- if (common->sysfs)
- device_unregister(&lun->dev);
- kfree(lun);
- }
-
- kfree(common->luns);
- }
-
- _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
- if (common->free_storage_on_release)
- kfree(common);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- struct usb_gadget *gadget = c->cdev->gadget;
- int i;
- struct usb_ep *ep;
- unsigned max_burst;
- int ret;
- struct fsg_opts *opts;
-
- opts = fsg_opts_from_func_inst(f->fi);
- if (!opts->no_configfs) {
- ret = fsg_common_set_cdev(fsg->common, c->cdev,
- fsg->common->can_stall);
- if (ret)
- return ret;
- fsg_common_set_inquiry_string(fsg->common, NULL, NULL);
- ret = fsg_common_run_thread(fsg->common);
- if (ret)
- return ret;
- }
-
- fsg->gadget = gadget;
-
- /* New interface */
- i = usb_interface_id(c, f);
- if (i < 0)
- return i;
- fsg_intf_desc.bInterfaceNumber = i;
- fsg->interface_number = i;
-
- /* Find all the endpoints we will use */
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
- if (!ep)
- goto autoconf_fail;
- ep->driver_data = fsg->common; /* claim the endpoint */
- fsg->bulk_in = ep;
-
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
- if (!ep)
- goto autoconf_fail;
- ep->driver_data = fsg->common; /* claim the endpoint */
- fsg->bulk_out = ep;
-
- /* Assume endpoint addresses are the same for both speeds */
- fsg_hs_bulk_in_desc.bEndpointAddress =
- fsg_fs_bulk_in_desc.bEndpointAddress;
- fsg_hs_bulk_out_desc.bEndpointAddress =
- fsg_fs_bulk_out_desc.bEndpointAddress;
-
- /* Calculate bMaxBurst, we know packet size is 1024 */
- max_burst = min_t(unsigned, FSG_BUFLEN / 1024, 15);
-
- fsg_ss_bulk_in_desc.bEndpointAddress =
- fsg_fs_bulk_in_desc.bEndpointAddress;
- fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst;
-
- fsg_ss_bulk_out_desc.bEndpointAddress =
- fsg_fs_bulk_out_desc.bEndpointAddress;
- fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst;
-
- ret = usb_assign_descriptors(f, fsg_fs_function, fsg_hs_function,
- fsg_ss_function);
- if (ret)
- goto autoconf_fail;
-
- return 0;
-
-autoconf_fail:
- ERROR(fsg, "unable to autoconfigure all endpoints\n");
- return -ENOTSUPP;
-}
-
-/****************************** ALLOCATE FUNCTION *************************/
-
-static void fsg_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- struct fsg_common *common = fsg->common;
-
- DBG(fsg, "unbind\n");
- if (fsg->common->fsg == fsg) {
- fsg->common->new_fsg = NULL;
- raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
- /* FIXME: make interruptible or killable somehow? */
- wait_event(common->fsg_wait, common->fsg != fsg);
- }
-
- usb_free_all_descriptors(&fsg->function);
-}
-
-static inline struct fsg_lun_opts *to_fsg_lun_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct fsg_lun_opts, group);
-}
-
-static inline struct fsg_opts *to_fsg_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct fsg_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(fsg_lun_opts);
-CONFIGFS_ATTR_OPS(fsg_lun_opts);
-
-static void fsg_lun_attr_release(struct config_item *item)
-{
- struct fsg_lun_opts *lun_opts;
-
- lun_opts = to_fsg_lun_opts(item);
- kfree(lun_opts);
-}
-
-static struct configfs_item_operations fsg_lun_item_ops = {
- .release = fsg_lun_attr_release,
- .show_attribute = fsg_lun_opts_attr_show,
- .store_attribute = fsg_lun_opts_attr_store,
-};
-
-static ssize_t fsg_lun_opts_file_show(struct fsg_lun_opts *opts, char *page)
-{
- struct fsg_opts *fsg_opts;
-
- fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
-
- return fsg_show_file(opts->lun, &fsg_opts->common->filesem, page);
-}
-
-static ssize_t fsg_lun_opts_file_store(struct fsg_lun_opts *opts,
- const char *page, size_t len)
-{
- struct fsg_opts *fsg_opts;
-
- fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
-
- return fsg_store_file(opts->lun, &fsg_opts->common->filesem, page, len);
-}
-
-static struct fsg_lun_opts_attribute fsg_lun_opts_file =
- __CONFIGFS_ATTR(file, S_IRUGO | S_IWUSR, fsg_lun_opts_file_show,
- fsg_lun_opts_file_store);
-
-static ssize_t fsg_lun_opts_ro_show(struct fsg_lun_opts *opts, char *page)
-{
- return fsg_show_ro(opts->lun, page);
-}
-
-static ssize_t fsg_lun_opts_ro_store(struct fsg_lun_opts *opts,
- const char *page, size_t len)
-{
- struct fsg_opts *fsg_opts;
-
- fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
-
- return fsg_store_ro(opts->lun, &fsg_opts->common->filesem, page, len);
-}
-
-static struct fsg_lun_opts_attribute fsg_lun_opts_ro =
- __CONFIGFS_ATTR(ro, S_IRUGO | S_IWUSR, fsg_lun_opts_ro_show,
- fsg_lun_opts_ro_store);
-
-static ssize_t fsg_lun_opts_removable_show(struct fsg_lun_opts *opts,
- char *page)
-{
- return fsg_show_removable(opts->lun, page);
-}
-
-static ssize_t fsg_lun_opts_removable_store(struct fsg_lun_opts *opts,
- const char *page, size_t len)
-{
- return fsg_store_removable(opts->lun, page, len);
-}
-
-static struct fsg_lun_opts_attribute fsg_lun_opts_removable =
- __CONFIGFS_ATTR(removable, S_IRUGO | S_IWUSR,
- fsg_lun_opts_removable_show,
- fsg_lun_opts_removable_store);
-
-static ssize_t fsg_lun_opts_cdrom_show(struct fsg_lun_opts *opts, char *page)
-{
- return fsg_show_cdrom(opts->lun, page);
-}
-
-static ssize_t fsg_lun_opts_cdrom_store(struct fsg_lun_opts *opts,
- const char *page, size_t len)
-{
- struct fsg_opts *fsg_opts;
-
- fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
-
- return fsg_store_cdrom(opts->lun, &fsg_opts->common->filesem, page,
- len);
-}
-
-static struct fsg_lun_opts_attribute fsg_lun_opts_cdrom =
- __CONFIGFS_ATTR(cdrom, S_IRUGO | S_IWUSR, fsg_lun_opts_cdrom_show,
- fsg_lun_opts_cdrom_store);
-
-static ssize_t fsg_lun_opts_nofua_show(struct fsg_lun_opts *opts, char *page)
-{
- return fsg_show_nofua(opts->lun, page);
-}
-
-static ssize_t fsg_lun_opts_nofua_store(struct fsg_lun_opts *opts,
- const char *page, size_t len)
-{
- return fsg_store_nofua(opts->lun, page, len);
-}
-
-static struct fsg_lun_opts_attribute fsg_lun_opts_nofua =
- __CONFIGFS_ATTR(nofua, S_IRUGO | S_IWUSR, fsg_lun_opts_nofua_show,
- fsg_lun_opts_nofua_store);
-
-static struct configfs_attribute *fsg_lun_attrs[] = {
- &fsg_lun_opts_file.attr,
- &fsg_lun_opts_ro.attr,
- &fsg_lun_opts_removable.attr,
- &fsg_lun_opts_cdrom.attr,
- &fsg_lun_opts_nofua.attr,
- NULL,
-};
-
-static struct config_item_type fsg_lun_type = {
- .ct_item_ops = &fsg_lun_item_ops,
- .ct_attrs = fsg_lun_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static struct config_group *fsg_lun_make(struct config_group *group,
- const char *name)
-{
- struct fsg_lun_opts *opts;
- struct fsg_opts *fsg_opts;
- struct fsg_lun_config config;
- char *num_str;
- u8 num;
- int ret;
-
- num_str = strchr(name, '.');
- if (!num_str) {
- pr_err("Unable to locate . in LUN.NUMBER\n");
- return ERR_PTR(-EINVAL);
- }
- num_str++;
-
- ret = kstrtou8(num_str, 0, &num);
- if (ret)
- return ERR_PTR(ret);
-
- fsg_opts = to_fsg_opts(&group->cg_item);
- if (num >= FSG_MAX_LUNS)
- return ERR_PTR(-ERANGE);
-
- mutex_lock(&fsg_opts->lock);
- if (fsg_opts->refcnt || fsg_opts->common->luns[num]) {
- ret = -EBUSY;
- goto out;
- }
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts) {
- ret = -ENOMEM;
- goto out;
- }
-
- memset(&config, 0, sizeof(config));
- config.removable = true;
-
- ret = fsg_common_create_lun(fsg_opts->common, &config, num, name,
- (const char **)&group->cg_item.ci_name);
- if (ret) {
- kfree(opts);
- goto out;
- }
- opts->lun = fsg_opts->common->luns[num];
- opts->lun_id = num;
- mutex_unlock(&fsg_opts->lock);
-
- config_group_init_type_name(&opts->group, name, &fsg_lun_type);
-
- return &opts->group;
-out:
- mutex_unlock(&fsg_opts->lock);
- return ERR_PTR(ret);
-}
-
-static void fsg_lun_drop(struct config_group *group, struct config_item *item)
-{
- struct fsg_lun_opts *lun_opts;
- struct fsg_opts *fsg_opts;
-
- lun_opts = to_fsg_lun_opts(item);
- fsg_opts = to_fsg_opts(&group->cg_item);
-
- mutex_lock(&fsg_opts->lock);
- if (fsg_opts->refcnt) {
- struct config_item *gadget;
-
- gadget = group->cg_item.ci_parent->ci_parent;
- unregister_gadget_item(gadget);
- }
-
- fsg_common_remove_lun(lun_opts->lun, fsg_opts->common->sysfs);
- fsg_opts->common->luns[lun_opts->lun_id] = NULL;
- lun_opts->lun_id = 0;
- mutex_unlock(&fsg_opts->lock);
-
- config_item_put(item);
-}
-
-CONFIGFS_ATTR_STRUCT(fsg_opts);
-CONFIGFS_ATTR_OPS(fsg_opts);
-
-static void fsg_attr_release(struct config_item *item)
-{
- struct fsg_opts *opts = to_fsg_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations fsg_item_ops = {
- .release = fsg_attr_release,
- .show_attribute = fsg_opts_attr_show,
- .store_attribute = fsg_opts_attr_store,
-};
-
-static ssize_t fsg_opts_stall_show(struct fsg_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->common->can_stall);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t fsg_opts_stall_store(struct fsg_opts *opts, const char *page,
- size_t len)
-{
- int ret;
- bool stall;
-
- mutex_lock(&opts->lock);
-
- if (opts->refcnt) {
- mutex_unlock(&opts->lock);
- return -EBUSY;
- }
-
- ret = strtobool(page, &stall);
- if (!ret) {
- opts->common->can_stall = stall;
- ret = len;
- }
-
- mutex_unlock(&opts->lock);
-
- return ret;
-}
-
-static struct fsg_opts_attribute fsg_opts_stall =
- __CONFIGFS_ATTR(stall, S_IRUGO | S_IWUSR, fsg_opts_stall_show,
- fsg_opts_stall_store);
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-static ssize_t fsg_opts_num_buffers_show(struct fsg_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->common->fsg_num_buffers);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t fsg_opts_num_buffers_store(struct fsg_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u8 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
- ret = kstrtou8(page, 0, &num);
- if (ret)
- goto end;
-
- ret = fsg_num_buffers_validate(num);
- if (ret)
- goto end;
-
- fsg_common_set_num_buffers(opts->common, num);
- ret = len;
-
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct fsg_opts_attribute fsg_opts_num_buffers =
- __CONFIGFS_ATTR(num_buffers, S_IRUGO | S_IWUSR,
- fsg_opts_num_buffers_show,
- fsg_opts_num_buffers_store);
-
-#endif
-
-static struct configfs_attribute *fsg_attrs[] = {
- &fsg_opts_stall.attr,
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- &fsg_opts_num_buffers.attr,
-#endif
- NULL,
-};
-
-static struct configfs_group_operations fsg_group_ops = {
- .make_group = fsg_lun_make,
- .drop_item = fsg_lun_drop,
-};
-
-static struct config_item_type fsg_func_type = {
- .ct_item_ops = &fsg_item_ops,
- .ct_group_ops = &fsg_group_ops,
- .ct_attrs = fsg_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void fsg_free_inst(struct usb_function_instance *fi)
-{
- struct fsg_opts *opts;
-
- opts = fsg_opts_from_func_inst(fi);
- fsg_common_put(opts->common);
- kfree(opts);
-}
-
-static struct usb_function_instance *fsg_alloc_inst(void)
-{
- struct fsg_opts *opts;
- struct fsg_lun_config config;
- int rc;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&opts->lock);
- opts->func_inst.free_func_inst = fsg_free_inst;
- opts->common = fsg_common_setup(opts->common);
- if (IS_ERR(opts->common)) {
- rc = PTR_ERR(opts->common);
- goto release_opts;
- }
- rc = fsg_common_set_nluns(opts->common, FSG_MAX_LUNS);
- if (rc)
- goto release_opts;
-
- rc = fsg_common_set_num_buffers(opts->common,
- CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS);
- if (rc)
- goto release_luns;
-
- pr_info(FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n");
-
- memset(&config, 0, sizeof(config));
- config.removable = true;
- rc = fsg_common_create_lun(opts->common, &config, 0, "lun.0",
- (const char **)&opts->func_inst.group.cg_item.ci_name);
- opts->lun0.lun = opts->common->luns[0];
- opts->lun0.lun_id = 0;
- config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type);
- opts->default_groups[0] = &opts->lun0.group;
- opts->func_inst.group.default_groups = opts->default_groups;
-
- config_group_init_type_name(&opts->func_inst.group, "", &fsg_func_type);
-
- return &opts->func_inst;
-
-release_luns:
- kfree(opts->common->luns);
-release_opts:
- kfree(opts);
- return ERR_PTR(rc);
-}
-
-static void fsg_free(struct usb_function *f)
-{
- struct fsg_dev *fsg;
- struct fsg_opts *opts;
-
- fsg = container_of(f, struct fsg_dev, function);
- opts = container_of(f->fi, struct fsg_opts, func_inst);
-
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-
- kfree(fsg);
-}
-
-static struct usb_function *fsg_alloc(struct usb_function_instance *fi)
-{
- struct fsg_opts *opts = fsg_opts_from_func_inst(fi);
- struct fsg_common *common = opts->common;
- struct fsg_dev *fsg;
-
- fsg = kzalloc(sizeof(*fsg), GFP_KERNEL);
- if (unlikely(!fsg))
- return ERR_PTR(-ENOMEM);
-
- mutex_lock(&opts->lock);
- opts->refcnt++;
- mutex_unlock(&opts->lock);
- fsg->function.name = FSG_DRIVER_DESC;
- fsg->function.bind = fsg_bind;
- fsg->function.unbind = fsg_unbind;
- fsg->function.setup = fsg_setup;
- fsg->function.set_alt = fsg_set_alt;
- fsg->function.disable = fsg_disable;
- fsg->function.free_func = fsg_free;
-
- fsg->common = common;
-
- return &fsg->function;
-}
-
-DECLARE_USB_FUNCTION_INIT(mass_storage, fsg_alloc_inst, fsg_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Michal Nazarewicz");
-
-/************************* Module parameters *************************/
-
-
-void fsg_config_from_params(struct fsg_config *cfg,
- const struct fsg_module_parameters *params,
- unsigned int fsg_num_buffers)
-{
- struct fsg_lun_config *lun;
- unsigned i;
-
- /* Configure LUNs */
- cfg->nluns =
- min(params->luns ?: (params->file_count ?: 1u),
- (unsigned)FSG_MAX_LUNS);
- for (i = 0, lun = cfg->luns; i < cfg->nluns; ++i, ++lun) {
- lun->ro = !!params->ro[i];
- lun->cdrom = !!params->cdrom[i];
- lun->removable = !!params->removable[i];
- lun->filename =
- params->file_count > i && params->file[i][0]
- ? params->file[i]
- : NULL;
- }
-
- /* Let MSF use defaults */
- cfg->vendor_name = NULL;
- cfg->product_name = NULL;
-
- cfg->ops = NULL;
- cfg->private_data = NULL;
-
- /* Finalise */
- cfg->can_stall = params->stall;
- cfg->fsg_num_buffers = fsg_num_buffers;
-}
-EXPORT_SYMBOL_GPL(fsg_config_from_params);
-
+++ /dev/null
-#ifndef USB_F_MASS_STORAGE_H
-#define USB_F_MASS_STORAGE_H
-
-#include <linux/usb/composite.h>
-#include "storage_common.h"
-
-struct fsg_module_parameters {
- char *file[FSG_MAX_LUNS];
- bool ro[FSG_MAX_LUNS];
- bool removable[FSG_MAX_LUNS];
- bool cdrom[FSG_MAX_LUNS];
- bool nofua[FSG_MAX_LUNS];
-
- unsigned int file_count, ro_count, removable_count, cdrom_count;
- unsigned int nofua_count;
- unsigned int luns; /* nluns */
- bool stall; /* can_stall */
-};
-
-#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc) \
- module_param_array_named(prefix ## name, params.name, type, \
- &prefix ## params.name ## _count, \
- S_IRUGO); \
- MODULE_PARM_DESC(prefix ## name, desc)
-
-#define _FSG_MODULE_PARAM(prefix, params, name, type, desc) \
- module_param_named(prefix ## name, params.name, type, \
- S_IRUGO); \
- MODULE_PARM_DESC(prefix ## name, desc)
-
-#define __FSG_MODULE_PARAMETERS(prefix, params) \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp, \
- "names of backing files or devices"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool, \
- "true to force read-only"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool, \
- "true to simulate removable media"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \
- "true to simulate CD-ROM instead of disk"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \
- "true to ignore SCSI WRITE(10,12) FUA bit"); \
- _FSG_MODULE_PARAM(prefix, params, luns, uint, \
- "number of LUNs"); \
- _FSG_MODULE_PARAM(prefix, params, stall, bool, \
- "false to prevent bulk stalls")
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-#define FSG_MODULE_PARAMETERS(prefix, params) \
- __FSG_MODULE_PARAMETERS(prefix, params); \
- module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
- MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
-#else
-
-#define FSG_MODULE_PARAMETERS(prefix, params) \
- __FSG_MODULE_PARAMETERS(prefix, params)
-
-#endif
-
-struct fsg_common;
-
-/* FSF callback functions */
-struct fsg_operations {
- /*
- * Callback function to call when thread exits. If no
- * callback is set or it returns value lower then zero MSF
- * will force eject all LUNs it operates on (including those
- * marked as non-removable or with prevent_medium_removal flag
- * set).
- */
- int (*thread_exits)(struct fsg_common *common);
-};
-
-struct fsg_lun_opts {
- struct config_group group;
- struct fsg_lun *lun;
- int lun_id;
-};
-
-struct fsg_opts {
- struct fsg_common *common;
- struct usb_function_instance func_inst;
- struct fsg_lun_opts lun0;
- struct config_group *default_groups[2];
- bool no_configfs; /* for legacy gadgets */
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-struct fsg_lun_config {
- const char *filename;
- char ro;
- char removable;
- char cdrom;
- char nofua;
-};
-
-struct fsg_config {
- unsigned nluns;
- struct fsg_lun_config luns[FSG_MAX_LUNS];
-
- /* Callback functions. */
- const struct fsg_operations *ops;
- /* Gadget's private data. */
- void *private_data;
-
- const char *vendor_name; /* 8 characters or less */
- const char *product_name; /* 16 characters or less */
-
- char can_stall;
- unsigned int fsg_num_buffers;
-};
-
-static inline struct fsg_opts *
-fsg_opts_from_func_inst(const struct usb_function_instance *fi)
-{
- return container_of(fi, struct fsg_opts, func_inst);
-}
-
-void fsg_common_get(struct fsg_common *common);
-
-void fsg_common_put(struct fsg_common *common);
-
-void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs);
-
-int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n);
-
-void fsg_common_free_buffers(struct fsg_common *common);
-
-int fsg_common_set_cdev(struct fsg_common *common,
- struct usb_composite_dev *cdev, bool can_stall);
-
-void fsg_common_remove_lun(struct fsg_lun *lun, bool sysfs);
-
-void fsg_common_remove_luns(struct fsg_common *common);
-
-void fsg_common_free_luns(struct fsg_common *common);
-
-int fsg_common_set_nluns(struct fsg_common *common, int nluns);
-
-void fsg_common_set_ops(struct fsg_common *common,
- const struct fsg_operations *ops);
-
-int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
- unsigned int id, const char *name,
- const char **name_pfx);
-
-int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg);
-
-void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
- const char *pn);
-
-int fsg_common_run_thread(struct fsg_common *common);
-
-void fsg_config_from_params(struct fsg_config *cfg,
- const struct fsg_module_parameters *params,
- unsigned int fsg_num_buffers);
-
-#endif /* USB_F_MASS_STORAGE_H */
+++ /dev/null
-/*
- * f_midi.c -- USB MIDI class function driver
- *
- * Copyright (C) 2006 Thumtronics Pty Ltd.
- * Developed for Thumtronics by Grey Innovation
- * Ben Williamson <ben.williamson@greyinnovation.com>
- *
- * Rewritten for the composite framework
- * Copyright (C) 2011 Daniel Mack <zonque@gmail.com>
- *
- * Based on drivers/usb/gadget/f_audio.c,
- * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
- * Copyright (C) 2008 Analog Devices, Inc
- *
- * and drivers/usb/gadget/midi.c,
- * Copyright (C) 2006 Thumtronics Pty Ltd.
- * Ben Williamson <ben.williamson@greyinnovation.com>
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-
-#include <sound/core.h>
-#include <sound/initval.h>
-#include <sound/rawmidi.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/audio.h>
-#include <linux/usb/midi.h>
-
-#include "u_f.h"
-
-MODULE_AUTHOR("Ben Williamson");
-MODULE_LICENSE("GPL v2");
-
-static const char f_midi_shortname[] = "f_midi";
-static const char f_midi_longname[] = "MIDI Gadget";
-
-/*
- * We can only handle 16 cables on one single endpoint, as cable numbers are
- * stored in 4-bit fields. And as the interface currently only holds one
- * single endpoint, this is the maximum number of ports we can allow.
- */
-#define MAX_PORTS 16
-
-/*
- * This is a gadget, and the IN/OUT naming is from the host's perspective.
- * USB -> OUT endpoint -> rawmidi
- * USB <- IN endpoint <- rawmidi
- */
-struct gmidi_in_port {
- struct f_midi *midi;
- int active;
- uint8_t cable;
- uint8_t state;
-#define STATE_UNKNOWN 0
-#define STATE_1PARAM 1
-#define STATE_2PARAM_1 2
-#define STATE_2PARAM_2 3
-#define STATE_SYSEX_0 4
-#define STATE_SYSEX_1 5
-#define STATE_SYSEX_2 6
- uint8_t data[2];
-};
-
-struct f_midi {
- struct usb_function func;
- struct usb_gadget *gadget;
- struct usb_ep *in_ep, *out_ep;
- struct snd_card *card;
- struct snd_rawmidi *rmidi;
-
- struct snd_rawmidi_substream *in_substream[MAX_PORTS];
- struct snd_rawmidi_substream *out_substream[MAX_PORTS];
- struct gmidi_in_port *in_port[MAX_PORTS];
-
- unsigned long out_triggered;
- struct tasklet_struct tasklet;
- unsigned int in_ports;
- unsigned int out_ports;
- int index;
- char *id;
- unsigned int buflen, qlen;
-};
-
-static inline struct f_midi *func_to_midi(struct usb_function *f)
-{
- return container_of(f, struct f_midi, func);
-}
-
-static void f_midi_transmit(struct f_midi *midi, struct usb_request *req);
-
-DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
-DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1);
-DECLARE_USB_MS_ENDPOINT_DESCRIPTOR(16);
-
-/* B.3.1 Standard AC Interface Descriptor */
-static struct usb_interface_descriptor ac_interface_desc __initdata = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- /* .bNumEndpoints = DYNAMIC */
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
- /* .iInterface = DYNAMIC */
-};
-
-/* B.3.2 Class-Specific AC Interface Descriptor */
-static struct uac1_ac_header_descriptor_1 ac_header_desc __initdata = {
- .bLength = UAC_DT_AC_HEADER_SIZE(1),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = USB_MS_HEADER,
- .bcdADC = cpu_to_le16(0x0100),
- .wTotalLength = cpu_to_le16(UAC_DT_AC_HEADER_SIZE(1)),
- .bInCollection = 1,
- /* .baInterfaceNr = DYNAMIC */
-};
-
-/* B.4.1 Standard MS Interface Descriptor */
-static struct usb_interface_descriptor ms_interface_desc __initdata = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_MIDISTREAMING,
- /* .iInterface = DYNAMIC */
-};
-
-/* B.4.2 Class-Specific MS Interface Descriptor */
-static struct usb_ms_header_descriptor ms_header_desc __initdata = {
- .bLength = USB_DT_MS_HEADER_SIZE,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = USB_MS_HEADER,
- .bcdMSC = cpu_to_le16(0x0100),
- /* .wTotalLength = DYNAMIC */
-};
-
-/* B.5.1 Standard Bulk OUT Endpoint Descriptor */
-static struct usb_endpoint_descriptor bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-/* B.5.2 Class-specific MS Bulk OUT Endpoint Descriptor */
-static struct usb_ms_endpoint_descriptor_16 ms_out_desc = {
- /* .bLength = DYNAMIC */
- .bDescriptorType = USB_DT_CS_ENDPOINT,
- .bDescriptorSubtype = USB_MS_GENERAL,
- /* .bNumEmbMIDIJack = DYNAMIC */
- /* .baAssocJackID = DYNAMIC */
-};
-
-/* B.6.1 Standard Bulk IN Endpoint Descriptor */
-static struct usb_endpoint_descriptor bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-/* B.6.2 Class-specific MS Bulk IN Endpoint Descriptor */
-static struct usb_ms_endpoint_descriptor_16 ms_in_desc = {
- /* .bLength = DYNAMIC */
- .bDescriptorType = USB_DT_CS_ENDPOINT,
- .bDescriptorSubtype = USB_MS_GENERAL,
- /* .bNumEmbMIDIJack = DYNAMIC */
- /* .baAssocJackID = DYNAMIC */
-};
-
-/* string IDs are assigned dynamically */
-
-#define STRING_FUNC_IDX 0
-
-static struct usb_string midi_string_defs[] = {
- [STRING_FUNC_IDX].s = "MIDI function",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings midi_stringtab = {
- .language = 0x0409, /* en-us */
- .strings = midi_string_defs,
-};
-
-static struct usb_gadget_strings *midi_strings[] = {
- &midi_stringtab,
- NULL,
-};
-
-static inline struct usb_request *midi_alloc_ep_req(struct usb_ep *ep,
- unsigned length)
-{
- return alloc_ep_req(ep, length, length);
-}
-
-static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
-{
- kfree(req->buf);
- usb_ep_free_request(ep, req);
-}
-
-static const uint8_t f_midi_cin_length[] = {
- 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
-};
-
-/*
- * Receives a chunk of MIDI data.
- */
-static void f_midi_read_data(struct usb_ep *ep, int cable,
- uint8_t *data, int length)
-{
- struct f_midi *midi = ep->driver_data;
- struct snd_rawmidi_substream *substream = midi->out_substream[cable];
-
- if (!substream)
- /* Nobody is listening - throw it on the floor. */
- return;
-
- if (!test_bit(cable, &midi->out_triggered))
- return;
-
- snd_rawmidi_receive(substream, data, length);
-}
-
-static void f_midi_handle_out_data(struct usb_ep *ep, struct usb_request *req)
-{
- unsigned int i;
- u8 *buf = req->buf;
-
- for (i = 0; i + 3 < req->actual; i += 4)
- if (buf[i] != 0) {
- int cable = buf[i] >> 4;
- int length = f_midi_cin_length[buf[i] & 0x0f];
- f_midi_read_data(ep, cable, &buf[i + 1], length);
- }
-}
-
-static void
-f_midi_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_midi *midi = ep->driver_data;
- struct usb_composite_dev *cdev = midi->func.config->cdev;
- int status = req->status;
-
- switch (status) {
- case 0: /* normal completion */
- if (ep == midi->out_ep) {
- /* We received stuff. req is queued again, below */
- f_midi_handle_out_data(ep, req);
- } else if (ep == midi->in_ep) {
- /* Our transmit completed. See if there's more to go.
- * f_midi_transmit eats req, don't queue it again. */
- f_midi_transmit(midi, req);
- return;
- }
- break;
-
- /* this endpoint is normally active while we're configured */
- case -ECONNABORTED: /* hardware forced ep reset */
- case -ECONNRESET: /* request dequeued */
- case -ESHUTDOWN: /* disconnect from host */
- VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
- req->actual, req->length);
- if (ep == midi->out_ep)
- f_midi_handle_out_data(ep, req);
-
- free_ep_req(ep, req);
- return;
-
- case -EOVERFLOW: /* buffer overrun on read means that
- * we didn't provide a big enough buffer.
- */
- default:
- DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
- status, req->actual, req->length);
- break;
- case -EREMOTEIO: /* short read */
- break;
- }
-
- status = usb_ep_queue(ep, req, GFP_ATOMIC);
- if (status) {
- ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
- ep->name, req->length, status);
- usb_ep_set_halt(ep);
- /* FIXME recover later ... somehow */
- }
-}
-
-static int f_midi_start_ep(struct f_midi *midi,
- struct usb_function *f,
- struct usb_ep *ep)
-{
- int err;
- struct usb_composite_dev *cdev = f->config->cdev;
-
- if (ep->driver_data)
- usb_ep_disable(ep);
-
- err = config_ep_by_speed(midi->gadget, f, ep);
- if (err) {
- ERROR(cdev, "can't configure %s: %d\n", ep->name, err);
- return err;
- }
-
- err = usb_ep_enable(ep);
- if (err) {
- ERROR(cdev, "can't start %s: %d\n", ep->name, err);
- return err;
- }
-
- ep->driver_data = midi;
-
- return 0;
-}
-
-static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_midi *midi = func_to_midi(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- unsigned i;
- int err;
-
- err = f_midi_start_ep(midi, f, midi->in_ep);
- if (err)
- return err;
-
- err = f_midi_start_ep(midi, f, midi->out_ep);
- if (err)
- return err;
-
- if (midi->out_ep->driver_data)
- usb_ep_disable(midi->out_ep);
-
- err = config_ep_by_speed(midi->gadget, f, midi->out_ep);
- if (err) {
- ERROR(cdev, "can't configure %s: %d\n",
- midi->out_ep->name, err);
- return err;
- }
-
- err = usb_ep_enable(midi->out_ep);
- if (err) {
- ERROR(cdev, "can't start %s: %d\n",
- midi->out_ep->name, err);
- return err;
- }
-
- midi->out_ep->driver_data = midi;
-
- /* allocate a bunch of read buffers and queue them all at once. */
- for (i = 0; i < midi->qlen && err == 0; i++) {
- struct usb_request *req =
- midi_alloc_ep_req(midi->out_ep, midi->buflen);
- if (req == NULL)
- return -ENOMEM;
-
- req->complete = f_midi_complete;
- err = usb_ep_queue(midi->out_ep, req, GFP_ATOMIC);
- if (err) {
- ERROR(midi, "%s queue req: %d\n",
- midi->out_ep->name, err);
- }
- }
-
- return 0;
-}
-
-static void f_midi_disable(struct usb_function *f)
-{
- struct f_midi *midi = func_to_midi(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "disable\n");
-
- /*
- * just disable endpoints, forcing completion of pending i/o.
- * all our completion handlers free their requests in this case.
- */
- usb_ep_disable(midi->in_ep);
- usb_ep_disable(midi->out_ep);
-}
-
-static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = f->config->cdev;
- struct f_midi *midi = func_to_midi(f);
- struct snd_card *card;
-
- DBG(cdev, "unbind\n");
-
- /* just to be sure */
- f_midi_disable(f);
-
- card = midi->card;
- midi->card = NULL;
- if (card)
- snd_card_free(card);
-
- kfree(midi->id);
- midi->id = NULL;
-
- usb_free_all_descriptors(f);
- kfree(midi);
-}
-
-static int f_midi_snd_free(struct snd_device *device)
-{
- return 0;
-}
-
-static void f_midi_transmit_packet(struct usb_request *req, uint8_t p0,
- uint8_t p1, uint8_t p2, uint8_t p3)
-{
- unsigned length = req->length;
- u8 *buf = (u8 *)req->buf + length;
-
- buf[0] = p0;
- buf[1] = p1;
- buf[2] = p2;
- buf[3] = p3;
- req->length = length + 4;
-}
-
-/*
- * Converts MIDI commands to USB MIDI packets.
- */
-static void f_midi_transmit_byte(struct usb_request *req,
- struct gmidi_in_port *port, uint8_t b)
-{
- uint8_t p0 = port->cable << 4;
-
- if (b >= 0xf8) {
- f_midi_transmit_packet(req, p0 | 0x0f, b, 0, 0);
- } else if (b >= 0xf0) {
- switch (b) {
- case 0xf0:
- port->data[0] = b;
- port->state = STATE_SYSEX_1;
- break;
- case 0xf1:
- case 0xf3:
- port->data[0] = b;
- port->state = STATE_1PARAM;
- break;
- case 0xf2:
- port->data[0] = b;
- port->state = STATE_2PARAM_1;
- break;
- case 0xf4:
- case 0xf5:
- port->state = STATE_UNKNOWN;
- break;
- case 0xf6:
- f_midi_transmit_packet(req, p0 | 0x05, 0xf6, 0, 0);
- port->state = STATE_UNKNOWN;
- break;
- case 0xf7:
- switch (port->state) {
- case STATE_SYSEX_0:
- f_midi_transmit_packet(req,
- p0 | 0x05, 0xf7, 0, 0);
- break;
- case STATE_SYSEX_1:
- f_midi_transmit_packet(req,
- p0 | 0x06, port->data[0], 0xf7, 0);
- break;
- case STATE_SYSEX_2:
- f_midi_transmit_packet(req,
- p0 | 0x07, port->data[0],
- port->data[1], 0xf7);
- break;
- }
- port->state = STATE_UNKNOWN;
- break;
- }
- } else if (b >= 0x80) {
- port->data[0] = b;
- if (b >= 0xc0 && b <= 0xdf)
- port->state = STATE_1PARAM;
- else
- port->state = STATE_2PARAM_1;
- } else { /* b < 0x80 */
- switch (port->state) {
- case STATE_1PARAM:
- if (port->data[0] < 0xf0) {
- p0 |= port->data[0] >> 4;
- } else {
- p0 |= 0x02;
- port->state = STATE_UNKNOWN;
- }
- f_midi_transmit_packet(req, p0, port->data[0], b, 0);
- break;
- case STATE_2PARAM_1:
- port->data[1] = b;
- port->state = STATE_2PARAM_2;
- break;
- case STATE_2PARAM_2:
- if (port->data[0] < 0xf0) {
- p0 |= port->data[0] >> 4;
- port->state = STATE_2PARAM_1;
- } else {
- p0 |= 0x03;
- port->state = STATE_UNKNOWN;
- }
- f_midi_transmit_packet(req,
- p0, port->data[0], port->data[1], b);
- break;
- case STATE_SYSEX_0:
- port->data[0] = b;
- port->state = STATE_SYSEX_1;
- break;
- case STATE_SYSEX_1:
- port->data[1] = b;
- port->state = STATE_SYSEX_2;
- break;
- case STATE_SYSEX_2:
- f_midi_transmit_packet(req,
- p0 | 0x04, port->data[0], port->data[1], b);
- port->state = STATE_SYSEX_0;
- break;
- }
- }
-}
-
-static void f_midi_transmit(struct f_midi *midi, struct usb_request *req)
-{
- struct usb_ep *ep = midi->in_ep;
- int i;
-
- if (!ep)
- return;
-
- if (!req)
- req = midi_alloc_ep_req(ep, midi->buflen);
-
- if (!req) {
- ERROR(midi, "gmidi_transmit: alloc_ep_request failed\n");
- return;
- }
- req->length = 0;
- req->complete = f_midi_complete;
-
- for (i = 0; i < MAX_PORTS; i++) {
- struct gmidi_in_port *port = midi->in_port[i];
- struct snd_rawmidi_substream *substream = midi->in_substream[i];
-
- if (!port || !port->active || !substream)
- continue;
-
- while (req->length + 3 < midi->buflen) {
- uint8_t b;
- if (snd_rawmidi_transmit(substream, &b, 1) != 1) {
- port->active = 0;
- break;
- }
- f_midi_transmit_byte(req, port, b);
- }
- }
-
- if (req->length > 0)
- usb_ep_queue(ep, req, GFP_ATOMIC);
- else
- free_ep_req(ep, req);
-}
-
-static void f_midi_in_tasklet(unsigned long data)
-{
- struct f_midi *midi = (struct f_midi *) data;
- f_midi_transmit(midi, NULL);
-}
-
-static int f_midi_in_open(struct snd_rawmidi_substream *substream)
-{
- struct f_midi *midi = substream->rmidi->private_data;
-
- if (!midi->in_port[substream->number])
- return -EINVAL;
-
- VDBG(midi, "%s()\n", __func__);
- midi->in_substream[substream->number] = substream;
- midi->in_port[substream->number]->state = STATE_UNKNOWN;
- return 0;
-}
-
-static int f_midi_in_close(struct snd_rawmidi_substream *substream)
-{
- struct f_midi *midi = substream->rmidi->private_data;
-
- VDBG(midi, "%s()\n", __func__);
- return 0;
-}
-
-static void f_midi_in_trigger(struct snd_rawmidi_substream *substream, int up)
-{
- struct f_midi *midi = substream->rmidi->private_data;
-
- if (!midi->in_port[substream->number])
- return;
-
- VDBG(midi, "%s() %d\n", __func__, up);
- midi->in_port[substream->number]->active = up;
- if (up)
- tasklet_hi_schedule(&midi->tasklet);
-}
-
-static int f_midi_out_open(struct snd_rawmidi_substream *substream)
-{
- struct f_midi *midi = substream->rmidi->private_data;
-
- if (substream->number >= MAX_PORTS)
- return -EINVAL;
-
- VDBG(midi, "%s()\n", __func__);
- midi->out_substream[substream->number] = substream;
- return 0;
-}
-
-static int f_midi_out_close(struct snd_rawmidi_substream *substream)
-{
- struct f_midi *midi = substream->rmidi->private_data;
-
- VDBG(midi, "%s()\n", __func__);
- return 0;
-}
-
-static void f_midi_out_trigger(struct snd_rawmidi_substream *substream, int up)
-{
- struct f_midi *midi = substream->rmidi->private_data;
-
- VDBG(midi, "%s()\n", __func__);
-
- if (up)
- set_bit(substream->number, &midi->out_triggered);
- else
- clear_bit(substream->number, &midi->out_triggered);
-}
-
-static struct snd_rawmidi_ops gmidi_in_ops = {
- .open = f_midi_in_open,
- .close = f_midi_in_close,
- .trigger = f_midi_in_trigger,
-};
-
-static struct snd_rawmidi_ops gmidi_out_ops = {
- .open = f_midi_out_open,
- .close = f_midi_out_close,
- .trigger = f_midi_out_trigger
-};
-
-/* register as a sound "card" */
-static int f_midi_register_card(struct f_midi *midi)
-{
- struct snd_card *card;
- struct snd_rawmidi *rmidi;
- int err;
- static struct snd_device_ops ops = {
- .dev_free = f_midi_snd_free,
- };
-
- err = snd_card_new(&midi->gadget->dev, midi->index, midi->id,
- THIS_MODULE, 0, &card);
- if (err < 0) {
- ERROR(midi, "snd_card_new() failed\n");
- goto fail;
- }
- midi->card = card;
-
- err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, midi, &ops);
- if (err < 0) {
- ERROR(midi, "snd_device_new() failed: error %d\n", err);
- goto fail;
- }
-
- strcpy(card->driver, f_midi_longname);
- strcpy(card->longname, f_midi_longname);
- strcpy(card->shortname, f_midi_shortname);
-
- /* Set up rawmidi */
- snd_component_add(card, "MIDI");
- err = snd_rawmidi_new(card, card->longname, 0,
- midi->out_ports, midi->in_ports, &rmidi);
- if (err < 0) {
- ERROR(midi, "snd_rawmidi_new() failed: error %d\n", err);
- goto fail;
- }
- midi->rmidi = rmidi;
- strcpy(rmidi->name, card->shortname);
- rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
- SNDRV_RAWMIDI_INFO_INPUT |
- SNDRV_RAWMIDI_INFO_DUPLEX;
- rmidi->private_data = midi;
-
- /*
- * Yes, rawmidi OUTPUT = USB IN, and rawmidi INPUT = USB OUT.
- * It's an upside-down world being a gadget.
- */
- snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &gmidi_in_ops);
- snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &gmidi_out_ops);
-
- /* register it - we're ready to go */
- err = snd_card_register(card);
- if (err < 0) {
- ERROR(midi, "snd_card_register() failed\n");
- goto fail;
- }
-
- VDBG(midi, "%s() finished ok\n", __func__);
- return 0;
-
-fail:
- if (midi->card) {
- snd_card_free(midi->card);
- midi->card = NULL;
- }
- return err;
-}
-
-/* MIDI function driver setup/binding */
-
-static int __init
-f_midi_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_descriptor_header **midi_function;
- struct usb_midi_in_jack_descriptor jack_in_ext_desc[MAX_PORTS];
- struct usb_midi_in_jack_descriptor jack_in_emb_desc[MAX_PORTS];
- struct usb_midi_out_jack_descriptor_1 jack_out_ext_desc[MAX_PORTS];
- struct usb_midi_out_jack_descriptor_1 jack_out_emb_desc[MAX_PORTS];
- struct usb_composite_dev *cdev = c->cdev;
- struct f_midi *midi = func_to_midi(f);
- int status, n, jack = 1, i = 0;
-
- /* maybe allocate device-global string ID */
- if (midi_string_defs[0].id == 0) {
- status = usb_string_id(c->cdev);
- if (status < 0)
- goto fail;
- midi_string_defs[0].id = status;
- }
-
- /* We have two interfaces, AudioControl and MIDIStreaming */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ac_interface_desc.bInterfaceNumber = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ms_interface_desc.bInterfaceNumber = status;
- ac_header_desc.baInterfaceNr[0] = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- midi->in_ep = usb_ep_autoconfig(cdev->gadget, &bulk_in_desc);
- if (!midi->in_ep)
- goto fail;
- midi->in_ep->driver_data = cdev; /* claim */
-
- midi->out_ep = usb_ep_autoconfig(cdev->gadget, &bulk_out_desc);
- if (!midi->out_ep)
- goto fail;
- midi->out_ep->driver_data = cdev; /* claim */
-
- /* allocate temporary function list */
- midi_function = kcalloc((MAX_PORTS * 4) + 9, sizeof(*midi_function),
- GFP_KERNEL);
- if (!midi_function) {
- status = -ENOMEM;
- goto fail;
- }
-
- /*
- * construct the function's descriptor set. As the number of
- * input and output MIDI ports is configurable, we have to do
- * it that way.
- */
-
- /* add the headers - these are always the same */
- midi_function[i++] = (struct usb_descriptor_header *) &ac_interface_desc;
- midi_function[i++] = (struct usb_descriptor_header *) &ac_header_desc;
- midi_function[i++] = (struct usb_descriptor_header *) &ms_interface_desc;
-
- /* calculate the header's wTotalLength */
- n = USB_DT_MS_HEADER_SIZE
- + (midi->in_ports + midi->out_ports) *
- (USB_DT_MIDI_IN_SIZE + USB_DT_MIDI_OUT_SIZE(1));
- ms_header_desc.wTotalLength = cpu_to_le16(n);
-
- midi_function[i++] = (struct usb_descriptor_header *) &ms_header_desc;
-
- /* configure the external IN jacks, each linked to an embedded OUT jack */
- for (n = 0; n < midi->in_ports; n++) {
- struct usb_midi_in_jack_descriptor *in_ext = &jack_in_ext_desc[n];
- struct usb_midi_out_jack_descriptor_1 *out_emb = &jack_out_emb_desc[n];
-
- in_ext->bLength = USB_DT_MIDI_IN_SIZE;
- in_ext->bDescriptorType = USB_DT_CS_INTERFACE;
- in_ext->bDescriptorSubtype = USB_MS_MIDI_IN_JACK;
- in_ext->bJackType = USB_MS_EXTERNAL;
- in_ext->bJackID = jack++;
- in_ext->iJack = 0;
- midi_function[i++] = (struct usb_descriptor_header *) in_ext;
-
- out_emb->bLength = USB_DT_MIDI_OUT_SIZE(1);
- out_emb->bDescriptorType = USB_DT_CS_INTERFACE;
- out_emb->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK;
- out_emb->bJackType = USB_MS_EMBEDDED;
- out_emb->bJackID = jack++;
- out_emb->bNrInputPins = 1;
- out_emb->pins[0].baSourcePin = 1;
- out_emb->pins[0].baSourceID = in_ext->bJackID;
- out_emb->iJack = 0;
- midi_function[i++] = (struct usb_descriptor_header *) out_emb;
-
- /* link it to the endpoint */
- ms_in_desc.baAssocJackID[n] = out_emb->bJackID;
- }
-
- /* configure the external OUT jacks, each linked to an embedded IN jack */
- for (n = 0; n < midi->out_ports; n++) {
- struct usb_midi_in_jack_descriptor *in_emb = &jack_in_emb_desc[n];
- struct usb_midi_out_jack_descriptor_1 *out_ext = &jack_out_ext_desc[n];
-
- in_emb->bLength = USB_DT_MIDI_IN_SIZE;
- in_emb->bDescriptorType = USB_DT_CS_INTERFACE;
- in_emb->bDescriptorSubtype = USB_MS_MIDI_IN_JACK;
- in_emb->bJackType = USB_MS_EMBEDDED;
- in_emb->bJackID = jack++;
- in_emb->iJack = 0;
- midi_function[i++] = (struct usb_descriptor_header *) in_emb;
-
- out_ext->bLength = USB_DT_MIDI_OUT_SIZE(1);
- out_ext->bDescriptorType = USB_DT_CS_INTERFACE;
- out_ext->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK;
- out_ext->bJackType = USB_MS_EXTERNAL;
- out_ext->bJackID = jack++;
- out_ext->bNrInputPins = 1;
- out_ext->iJack = 0;
- out_ext->pins[0].baSourceID = in_emb->bJackID;
- out_ext->pins[0].baSourcePin = 1;
- midi_function[i++] = (struct usb_descriptor_header *) out_ext;
-
- /* link it to the endpoint */
- ms_out_desc.baAssocJackID[n] = in_emb->bJackID;
- }
-
- /* configure the endpoint descriptors ... */
- ms_out_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->in_ports);
- ms_out_desc.bNumEmbMIDIJack = midi->in_ports;
-
- ms_in_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->out_ports);
- ms_in_desc.bNumEmbMIDIJack = midi->out_ports;
-
- /* ... and add them to the list */
- midi_function[i++] = (struct usb_descriptor_header *) &bulk_out_desc;
- midi_function[i++] = (struct usb_descriptor_header *) &ms_out_desc;
- midi_function[i++] = (struct usb_descriptor_header *) &bulk_in_desc;
- midi_function[i++] = (struct usb_descriptor_header *) &ms_in_desc;
- midi_function[i++] = NULL;
-
- /*
- * support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- /* copy descriptors, and track endpoint copies */
- f->fs_descriptors = usb_copy_descriptors(midi_function);
- if (!f->fs_descriptors)
- goto fail_f_midi;
-
- if (gadget_is_dualspeed(c->cdev->gadget)) {
- bulk_in_desc.wMaxPacketSize = cpu_to_le16(512);
- bulk_out_desc.wMaxPacketSize = cpu_to_le16(512);
- f->hs_descriptors = usb_copy_descriptors(midi_function);
- if (!f->hs_descriptors)
- goto fail_f_midi;
- }
-
- kfree(midi_function);
-
- return 0;
-
-fail_f_midi:
- kfree(midi_function);
- usb_free_descriptors(f->hs_descriptors);
-fail:
- /* we might as well release our claims on endpoints */
- if (midi->out_ep)
- midi->out_ep->driver_data = NULL;
- if (midi->in_ep)
- midi->in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-/**
- * f_midi_bind_config - add USB MIDI function to a configuration
- * @c: the configuration to supcard the USB audio function
- * @index: the soundcard index to use for the ALSA device creation
- * @id: the soundcard id to use for the ALSA device creation
- * @buflen: the buffer length to use
- * @qlen the number of read requests to pre-allocate
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- */
-int __init f_midi_bind_config(struct usb_configuration *c,
- int index, char *id,
- unsigned int in_ports,
- unsigned int out_ports,
- unsigned int buflen,
- unsigned int qlen)
-{
- struct f_midi *midi;
- int status, i;
-
- /* sanity check */
- if (in_ports > MAX_PORTS || out_ports > MAX_PORTS)
- return -EINVAL;
-
- /* allocate and initialize one new instance */
- midi = kzalloc(sizeof *midi, GFP_KERNEL);
- if (!midi) {
- status = -ENOMEM;
- goto fail;
- }
-
- for (i = 0; i < in_ports; i++) {
- struct gmidi_in_port *port = kzalloc(sizeof(*port), GFP_KERNEL);
- if (!port) {
- status = -ENOMEM;
- goto setup_fail;
- }
-
- port->midi = midi;
- port->active = 0;
- port->cable = i;
- midi->in_port[i] = port;
- }
-
- midi->gadget = c->cdev->gadget;
- tasklet_init(&midi->tasklet, f_midi_in_tasklet, (unsigned long) midi);
-
- /* set up ALSA midi devices */
- midi->in_ports = in_ports;
- midi->out_ports = out_ports;
- status = f_midi_register_card(midi);
- if (status < 0)
- goto setup_fail;
-
- midi->func.name = "gmidi function";
- midi->func.strings = midi_strings;
- midi->func.bind = f_midi_bind;
- midi->func.unbind = f_midi_unbind;
- midi->func.set_alt = f_midi_set_alt;
- midi->func.disable = f_midi_disable;
-
- midi->id = kstrdup(id, GFP_KERNEL);
- midi->index = index;
- midi->buflen = buflen;
- midi->qlen = qlen;
-
- status = usb_add_function(c, &midi->func);
- if (status)
- goto setup_fail;
-
- return 0;
-
-setup_fail:
- for (--i; i >= 0; i--)
- kfree(midi->in_port[i]);
- kfree(midi);
-fail:
- return status;
-}
-
+++ /dev/null
-/*
- * f_ncm.c -- USB CDC Network (NCM) link function driver
- *
- * Copyright (C) 2010 Nokia Corporation
- * Contact: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
- *
- * The driver borrows from f_ecm.c which is:
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/etherdevice.h>
-#include <linux/crc32.h>
-
-#include <linux/usb/cdc.h>
-
-#include "u_ether.h"
-#include "u_ether_configfs.h"
-#include "u_ncm.h"
-
-/*
- * This function is a "CDC Network Control Model" (CDC NCM) Ethernet link.
- * NCM is intended to be used with high-speed network attachments.
- *
- * Note that NCM requires the use of "alternate settings" for its data
- * interface. This means that the set_alt() method has real work to do,
- * and also means that a get_alt() method is required.
- */
-
-/* to trigger crc/non-crc ndp signature */
-
-#define NCM_NDP_HDR_CRC_MASK 0x01000000
-#define NCM_NDP_HDR_CRC 0x01000000
-#define NCM_NDP_HDR_NOCRC 0x00000000
-
-enum ncm_notify_state {
- NCM_NOTIFY_NONE, /* don't notify */
- NCM_NOTIFY_CONNECT, /* issue CONNECT next */
- NCM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */
-};
-
-struct f_ncm {
- struct gether port;
- u8 ctrl_id, data_id;
-
- char ethaddr[14];
-
- struct usb_ep *notify;
- struct usb_request *notify_req;
- u8 notify_state;
- bool is_open;
-
- const struct ndp_parser_opts *parser_opts;
- bool is_crc;
- u32 ndp_sign;
-
- /*
- * for notification, it is accessed from both
- * callback and ethernet open/close
- */
- spinlock_t lock;
-
- struct net_device *netdev;
-
- /* For multi-frame NDP TX */
- struct sk_buff *skb_tx_data;
- struct sk_buff *skb_tx_ndp;
- u16 ndp_dgram_count;
- bool timer_force_tx;
- struct tasklet_struct tx_tasklet;
- struct hrtimer task_timer;
-
- bool timer_stopping;
-};
-
-static inline struct f_ncm *func_to_ncm(struct usb_function *f)
-{
- return container_of(f, struct f_ncm, port.func);
-}
-
-/* peak (theoretical) bulk transfer rate in bits-per-second */
-static inline unsigned ncm_bitrate(struct usb_gadget *g)
-{
- if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
- return 13 * 512 * 8 * 1000 * 8;
- else
- return 19 * 64 * 1 * 1000 * 8;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * We cannot group frames so use just the minimal size which ok to put
- * one max-size ethernet frame.
- * If the host can group frames, allow it to do that, 16K is selected,
- * because it's used by default by the current linux host driver
- */
-#define NTB_DEFAULT_IN_SIZE 16384
-#define NTB_OUT_SIZE 16384
-
-/* Allocation for storing the NDP, 32 should suffice for a
- * 16k packet. This allows a maximum of 32 * 507 Byte packets to
- * be transmitted in a single 16kB skb, though when sending full size
- * packets this limit will be plenty.
- * Smaller packets are not likely to be trying to maximize the
- * throughput and will be mstly sending smaller infrequent frames.
- */
-#define TX_MAX_NUM_DPE 32
-
-/* Delay for the transmit to wait before sending an unfilled NTB frame. */
-#define TX_TIMEOUT_NSECS 300000
-
-#define FORMATS_SUPPORTED (USB_CDC_NCM_NTB16_SUPPORTED | \
- USB_CDC_NCM_NTB32_SUPPORTED)
-
-static struct usb_cdc_ncm_ntb_parameters ntb_parameters = {
- .wLength = cpu_to_le16(sizeof(ntb_parameters)),
- .bmNtbFormatsSupported = cpu_to_le16(FORMATS_SUPPORTED),
- .dwNtbInMaxSize = cpu_to_le32(NTB_DEFAULT_IN_SIZE),
- .wNdpInDivisor = cpu_to_le16(4),
- .wNdpInPayloadRemainder = cpu_to_le16(0),
- .wNdpInAlignment = cpu_to_le16(4),
-
- .dwNtbOutMaxSize = cpu_to_le32(NTB_OUT_SIZE),
- .wNdpOutDivisor = cpu_to_le16(4),
- .wNdpOutPayloadRemainder = cpu_to_le16(0),
- .wNdpOutAlignment = cpu_to_le16(4),
-};
-
-/*
- * Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
- * packet, to simplify cancellation; and a big transfer interval, to
- * waste less bandwidth.
- */
-
-#define NCM_STATUS_INTERVAL_MS 32
-#define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */
-
-static struct usb_interface_assoc_descriptor ncm_iad_desc = {
- .bLength = sizeof ncm_iad_desc,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- /* .bFirstInterface = DYNAMIC, */
- .bInterfaceCount = 2, /* control + data */
- .bFunctionClass = USB_CLASS_COMM,
- .bFunctionSubClass = USB_CDC_SUBCLASS_NCM,
- .bFunctionProtocol = USB_CDC_PROTO_NONE,
- /* .iFunction = DYNAMIC */
-};
-
-/* interface descriptor: */
-
-static struct usb_interface_descriptor ncm_control_intf = {
- .bLength = sizeof ncm_control_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
- .bInterfaceProtocol = USB_CDC_PROTO_NONE,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc ncm_header_desc = {
- .bLength = sizeof ncm_header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
-
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_union_desc ncm_union_desc = {
- .bLength = sizeof(ncm_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- /* .bMasterInterface0 = DYNAMIC */
- /* .bSlaveInterface0 = DYNAMIC */
-};
-
-static struct usb_cdc_ether_desc ecm_desc = {
- .bLength = sizeof ecm_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
-
- /* this descriptor actually adds value, surprise! */
- /* .iMACAddress = DYNAMIC */
- .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
- .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
- .wNumberMCFilters = cpu_to_le16(0),
- .bNumberPowerFilters = 0,
-};
-
-#define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE)
-
-static struct usb_cdc_ncm_desc ncm_desc = {
- .bLength = sizeof ncm_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_NCM_TYPE,
-
- .bcdNcmVersion = cpu_to_le16(0x0100),
- /* can process SetEthernetPacketFilter */
- .bmNetworkCapabilities = NCAPS,
-};
-
-/* the default data interface has no endpoints ... */
-
-static struct usb_interface_descriptor ncm_data_nop_intf = {
- .bLength = sizeof ncm_data_nop_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bInterfaceNumber = 1,
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
- /* .iInterface = DYNAMIC */
-};
-
-/* ... but the "real" data interface has two bulk endpoints */
-
-static struct usb_interface_descriptor ncm_data_intf = {
- .bLength = sizeof ncm_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bInterfaceNumber = 1,
- .bAlternateSetting = 1,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
- /* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_ncm_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
- .bInterval = NCM_STATUS_INTERVAL_MS,
-};
-
-static struct usb_endpoint_descriptor fs_ncm_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_ncm_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *ncm_fs_function[] = {
- (struct usb_descriptor_header *) &ncm_iad_desc,
- /* CDC NCM control descriptors */
- (struct usb_descriptor_header *) &ncm_control_intf,
- (struct usb_descriptor_header *) &ncm_header_desc,
- (struct usb_descriptor_header *) &ncm_union_desc,
- (struct usb_descriptor_header *) &ecm_desc,
- (struct usb_descriptor_header *) &ncm_desc,
- (struct usb_descriptor_header *) &fs_ncm_notify_desc,
- /* data interface, altsettings 0 and 1 */
- (struct usb_descriptor_header *) &ncm_data_nop_intf,
- (struct usb_descriptor_header *) &ncm_data_intf,
- (struct usb_descriptor_header *) &fs_ncm_in_desc,
- (struct usb_descriptor_header *) &fs_ncm_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_ncm_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
- .bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS),
-};
-static struct usb_endpoint_descriptor hs_ncm_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_ncm_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *ncm_hs_function[] = {
- (struct usb_descriptor_header *) &ncm_iad_desc,
- /* CDC NCM control descriptors */
- (struct usb_descriptor_header *) &ncm_control_intf,
- (struct usb_descriptor_header *) &ncm_header_desc,
- (struct usb_descriptor_header *) &ncm_union_desc,
- (struct usb_descriptor_header *) &ecm_desc,
- (struct usb_descriptor_header *) &ncm_desc,
- (struct usb_descriptor_header *) &hs_ncm_notify_desc,
- /* data interface, altsettings 0 and 1 */
- (struct usb_descriptor_header *) &ncm_data_nop_intf,
- (struct usb_descriptor_header *) &ncm_data_intf,
- (struct usb_descriptor_header *) &hs_ncm_in_desc,
- (struct usb_descriptor_header *) &hs_ncm_out_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-#define STRING_CTRL_IDX 0
-#define STRING_MAC_IDX 1
-#define STRING_DATA_IDX 2
-#define STRING_IAD_IDX 3
-
-static struct usb_string ncm_string_defs[] = {
- [STRING_CTRL_IDX].s = "CDC Network Control Model (NCM)",
- [STRING_MAC_IDX].s = "",
- [STRING_DATA_IDX].s = "CDC Network Data",
- [STRING_IAD_IDX].s = "CDC NCM",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings ncm_string_table = {
- .language = 0x0409, /* en-us */
- .strings = ncm_string_defs,
-};
-
-static struct usb_gadget_strings *ncm_strings[] = {
- &ncm_string_table,
- NULL,
-};
-
-/*
- * Here are options for NCM Datagram Pointer table (NDP) parser.
- * There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3),
- * in NDP16 offsets and sizes fields are 1 16bit word wide,
- * in NDP32 -- 2 16bit words wide. Also signatures are different.
- * To make the parser code the same, put the differences in the structure,
- * and switch pointers to the structures when the format is changed.
- */
-
-struct ndp_parser_opts {
- u32 nth_sign;
- u32 ndp_sign;
- unsigned nth_size;
- unsigned ndp_size;
- unsigned dpe_size;
- unsigned ndplen_align;
- /* sizes in u16 units */
- unsigned dgram_item_len; /* index or length */
- unsigned block_length;
- unsigned ndp_index;
- unsigned reserved1;
- unsigned reserved2;
- unsigned next_ndp_index;
-};
-
-#define INIT_NDP16_OPTS { \
- .nth_sign = USB_CDC_NCM_NTH16_SIGN, \
- .ndp_sign = USB_CDC_NCM_NDP16_NOCRC_SIGN, \
- .nth_size = sizeof(struct usb_cdc_ncm_nth16), \
- .ndp_size = sizeof(struct usb_cdc_ncm_ndp16), \
- .dpe_size = sizeof(struct usb_cdc_ncm_dpe16), \
- .ndplen_align = 4, \
- .dgram_item_len = 1, \
- .block_length = 1, \
- .ndp_index = 1, \
- .reserved1 = 0, \
- .reserved2 = 0, \
- .next_ndp_index = 1, \
- }
-
-
-#define INIT_NDP32_OPTS { \
- .nth_sign = USB_CDC_NCM_NTH32_SIGN, \
- .ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN, \
- .nth_size = sizeof(struct usb_cdc_ncm_nth32), \
- .ndp_size = sizeof(struct usb_cdc_ncm_ndp32), \
- .dpe_size = sizeof(struct usb_cdc_ncm_dpe32), \
- .ndplen_align = 8, \
- .dgram_item_len = 2, \
- .block_length = 2, \
- .ndp_index = 2, \
- .reserved1 = 1, \
- .reserved2 = 2, \
- .next_ndp_index = 2, \
- }
-
-static const struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS;
-static const struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS;
-
-static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
-{
- switch (size) {
- case 1:
- put_unaligned_le16((u16)val, *p);
- break;
- case 2:
- put_unaligned_le32((u32)val, *p);
-
- break;
- default:
- BUG();
- }
-
- *p += size;
-}
-
-static inline unsigned get_ncm(__le16 **p, unsigned size)
-{
- unsigned tmp;
-
- switch (size) {
- case 1:
- tmp = get_unaligned_le16(*p);
- break;
- case 2:
- tmp = get_unaligned_le32(*p);
- break;
- default:
- BUG();
- }
-
- *p += size;
- return tmp;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static inline void ncm_reset_values(struct f_ncm *ncm)
-{
- ncm->parser_opts = &ndp16_opts;
- ncm->is_crc = false;
- ncm->port.cdc_filter = DEFAULT_FILTER;
-
- /* doesn't make sense for ncm, fixed size used */
- ncm->port.header_len = 0;
-
- ncm->port.fixed_out_len = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
- ncm->port.fixed_in_len = NTB_DEFAULT_IN_SIZE;
-}
-
-/*
- * Context: ncm->lock held
- */
-static void ncm_do_notify(struct f_ncm *ncm)
-{
- struct usb_request *req = ncm->notify_req;
- struct usb_cdc_notification *event;
- struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
- __le32 *data;
- int status;
-
- /* notification already in flight? */
- if (!req)
- return;
-
- event = req->buf;
- switch (ncm->notify_state) {
- case NCM_NOTIFY_NONE:
- return;
-
- case NCM_NOTIFY_CONNECT:
- event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
- if (ncm->is_open)
- event->wValue = cpu_to_le16(1);
- else
- event->wValue = cpu_to_le16(0);
- event->wLength = 0;
- req->length = sizeof *event;
-
- DBG(cdev, "notify connect %s\n",
- ncm->is_open ? "true" : "false");
- ncm->notify_state = NCM_NOTIFY_NONE;
- break;
-
- case NCM_NOTIFY_SPEED:
- event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
- event->wValue = cpu_to_le16(0);
- event->wLength = cpu_to_le16(8);
- req->length = NCM_STATUS_BYTECOUNT;
-
- /* SPEED_CHANGE data is up/down speeds in bits/sec */
- data = req->buf + sizeof *event;
- data[0] = cpu_to_le32(ncm_bitrate(cdev->gadget));
- data[1] = data[0];
-
- DBG(cdev, "notify speed %d\n", ncm_bitrate(cdev->gadget));
- ncm->notify_state = NCM_NOTIFY_CONNECT;
- break;
- }
- event->bmRequestType = 0xA1;
- event->wIndex = cpu_to_le16(ncm->ctrl_id);
-
- ncm->notify_req = NULL;
- /*
- * In double buffering if there is a space in FIFO,
- * completion callback can be called right after the call,
- * so unlocking
- */
- spin_unlock(&ncm->lock);
- status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC);
- spin_lock(&ncm->lock);
- if (status < 0) {
- ncm->notify_req = req;
- DBG(cdev, "notify --> %d\n", status);
- }
-}
-
-/*
- * Context: ncm->lock held
- */
-static void ncm_notify(struct f_ncm *ncm)
-{
- /*
- * NOTE on most versions of Linux, host side cdc-ethernet
- * won't listen for notifications until its netdevice opens.
- * The first notification then sits in the FIFO for a long
- * time, and the second one is queued.
- *
- * If ncm_notify() is called before the second (CONNECT)
- * notification is sent, then it will reset to send the SPEED
- * notificaion again (and again, and again), but it's not a problem
- */
- ncm->notify_state = NCM_NOTIFY_SPEED;
- ncm_do_notify(ncm);
-}
-
-static void ncm_notify_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_ncm *ncm = req->context;
- struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
- struct usb_cdc_notification *event = req->buf;
-
- spin_lock(&ncm->lock);
- switch (req->status) {
- case 0:
- VDBG(cdev, "Notification %02x sent\n",
- event->bNotificationType);
- break;
- case -ECONNRESET:
- case -ESHUTDOWN:
- ncm->notify_state = NCM_NOTIFY_NONE;
- break;
- default:
- DBG(cdev, "event %02x --> %d\n",
- event->bNotificationType, req->status);
- break;
- }
- ncm->notify_req = req;
- ncm_do_notify(ncm);
- spin_unlock(&ncm->lock);
-}
-
-static void ncm_ep0out_complete(struct usb_ep *ep, struct usb_request *req)
-{
- /* now for SET_NTB_INPUT_SIZE only */
- unsigned in_size;
- struct usb_function *f = req->context;
- struct f_ncm *ncm = func_to_ncm(f);
- struct usb_composite_dev *cdev = ep->driver_data;
-
- req->context = NULL;
- if (req->status || req->actual != req->length) {
- DBG(cdev, "Bad control-OUT transfer\n");
- goto invalid;
- }
-
- in_size = get_unaligned_le32(req->buf);
- if (in_size < USB_CDC_NCM_NTB_MIN_IN_SIZE ||
- in_size > le32_to_cpu(ntb_parameters.dwNtbInMaxSize)) {
- DBG(cdev, "Got wrong INPUT SIZE (%d) from host\n", in_size);
- goto invalid;
- }
-
- ncm->port.fixed_in_len = in_size;
- VDBG(cdev, "Set NTB INPUT SIZE %d\n", in_size);
- return;
-
-invalid:
- usb_ep_set_halt(ep);
- return;
-}
-
-static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct f_ncm *ncm = func_to_ncm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /*
- * composite driver infrastructure handles everything except
- * CDC class messages; interface activation uses set_alt().
- */
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SET_ETHERNET_PACKET_FILTER:
- /*
- * see 6.2.30: no data, wIndex = interface,
- * wValue = packet filter bitmap
- */
- if (w_length != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- DBG(cdev, "packet filter %02x\n", w_value);
- /*
- * REVISIT locking of cdc_filter. This assumes the UDC
- * driver won't have a concurrent packet TX irq running on
- * another CPU; or that if it does, this write is atomic...
- */
- ncm->port.cdc_filter = w_value;
- value = 0;
- break;
- /*
- * and optionally:
- * case USB_CDC_SEND_ENCAPSULATED_COMMAND:
- * case USB_CDC_GET_ENCAPSULATED_RESPONSE:
- * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
- * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
- * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
- * case USB_CDC_GET_ETHERNET_STATISTIC:
- */
-
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_GET_NTB_PARAMETERS:
-
- if (w_length == 0 || w_value != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- value = w_length > sizeof ntb_parameters ?
- sizeof ntb_parameters : w_length;
- memcpy(req->buf, &ntb_parameters, value);
- VDBG(cdev, "Host asked NTB parameters\n");
- break;
-
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_GET_NTB_INPUT_SIZE:
-
- if (w_length < 4 || w_value != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- put_unaligned_le32(ncm->port.fixed_in_len, req->buf);
- value = 4;
- VDBG(cdev, "Host asked INPUT SIZE, sending %d\n",
- ncm->port.fixed_in_len);
- break;
-
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SET_NTB_INPUT_SIZE:
- {
- if (w_length != 4 || w_value != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- req->complete = ncm_ep0out_complete;
- req->length = w_length;
- req->context = f;
-
- value = req->length;
- break;
- }
-
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_GET_NTB_FORMAT:
- {
- uint16_t format;
-
- if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- format = (ncm->parser_opts == &ndp16_opts) ? 0x0000 : 0x0001;
- put_unaligned_le16(format, req->buf);
- value = 2;
- VDBG(cdev, "Host asked NTB FORMAT, sending %d\n", format);
- break;
- }
-
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SET_NTB_FORMAT:
- {
- if (w_length != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- switch (w_value) {
- case 0x0000:
- ncm->parser_opts = &ndp16_opts;
- DBG(cdev, "NCM16 selected\n");
- break;
- case 0x0001:
- ncm->parser_opts = &ndp32_opts;
- DBG(cdev, "NCM32 selected\n");
- break;
- default:
- goto invalid;
- }
- value = 0;
- break;
- }
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_GET_CRC_MODE:
- {
- uint16_t is_crc;
-
- if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- is_crc = ncm->is_crc ? 0x0001 : 0x0000;
- put_unaligned_le16(is_crc, req->buf);
- value = 2;
- VDBG(cdev, "Host asked CRC MODE, sending %d\n", is_crc);
- break;
- }
-
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SET_CRC_MODE:
- {
- int ndp_hdr_crc = 0;
-
- if (w_length != 0 || w_index != ncm->ctrl_id)
- goto invalid;
- switch (w_value) {
- case 0x0000:
- ncm->is_crc = false;
- ndp_hdr_crc = NCM_NDP_HDR_NOCRC;
- DBG(cdev, "non-CRC mode selected\n");
- break;
- case 0x0001:
- ncm->is_crc = true;
- ndp_hdr_crc = NCM_NDP_HDR_CRC;
- DBG(cdev, "CRC mode selected\n");
- break;
- default:
- goto invalid;
- }
- ncm->ndp_sign = ncm->parser_opts->ndp_sign | ndp_hdr_crc;
- value = 0;
- break;
- }
-
- /* and disabled in ncm descriptor: */
- /* case USB_CDC_GET_NET_ADDRESS: */
- /* case USB_CDC_SET_NET_ADDRESS: */
- /* case USB_CDC_GET_MAX_DATAGRAM_SIZE: */
- /* case USB_CDC_SET_MAX_DATAGRAM_SIZE: */
-
- default:
-invalid:
- DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "ncm req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = 0;
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "ncm req %02x.%02x response err %d\n",
- ctrl->bRequestType, ctrl->bRequest,
- value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-
-static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_ncm *ncm = func_to_ncm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* Control interface has only altsetting 0 */
- if (intf == ncm->ctrl_id) {
- if (alt != 0)
- goto fail;
-
- if (ncm->notify->driver_data) {
- DBG(cdev, "reset ncm control %d\n", intf);
- usb_ep_disable(ncm->notify);
- }
-
- if (!(ncm->notify->desc)) {
- DBG(cdev, "init ncm ctrl %d\n", intf);
- if (config_ep_by_speed(cdev->gadget, f, ncm->notify))
- goto fail;
- }
- usb_ep_enable(ncm->notify);
- ncm->notify->driver_data = ncm;
-
- /* Data interface has two altsettings, 0 and 1 */
- } else if (intf == ncm->data_id) {
- if (alt > 1)
- goto fail;
-
- if (ncm->port.in_ep->driver_data) {
- DBG(cdev, "reset ncm\n");
- ncm->timer_stopping = true;
- ncm->netdev = NULL;
- gether_disconnect(&ncm->port);
- ncm_reset_values(ncm);
- }
-
- /*
- * CDC Network only sends data in non-default altsettings.
- * Changing altsettings resets filters, statistics, etc.
- */
- if (alt == 1) {
- struct net_device *net;
-
- if (!ncm->port.in_ep->desc ||
- !ncm->port.out_ep->desc) {
- DBG(cdev, "init ncm\n");
- if (config_ep_by_speed(cdev->gadget, f,
- ncm->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f,
- ncm->port.out_ep)) {
- ncm->port.in_ep->desc = NULL;
- ncm->port.out_ep->desc = NULL;
- goto fail;
- }
- }
-
- /* TODO */
- /* Enable zlps by default for NCM conformance;
- * override for musb_hdrc (avoids txdma ovhead)
- */
- ncm->port.is_zlp_ok = !(
- gadget_is_musbhdrc(cdev->gadget)
- );
- ncm->port.cdc_filter = DEFAULT_FILTER;
- DBG(cdev, "activate ncm\n");
- net = gether_connect(&ncm->port);
- if (IS_ERR(net))
- return PTR_ERR(net);
- ncm->netdev = net;
- ncm->timer_stopping = false;
- }
-
- spin_lock(&ncm->lock);
- ncm_notify(ncm);
- spin_unlock(&ncm->lock);
- } else
- goto fail;
-
- return 0;
-fail:
- return -EINVAL;
-}
-
-/*
- * Because the data interface supports multiple altsettings,
- * this NCM function *MUST* implement a get_alt() method.
- */
-static int ncm_get_alt(struct usb_function *f, unsigned intf)
-{
- struct f_ncm *ncm = func_to_ncm(f);
-
- if (intf == ncm->ctrl_id)
- return 0;
- return ncm->port.in_ep->driver_data ? 1 : 0;
-}
-
-static struct sk_buff *package_for_tx(struct f_ncm *ncm)
-{
- __le16 *ntb_iter;
- struct sk_buff *skb2 = NULL;
- unsigned ndp_pad;
- unsigned ndp_index;
- unsigned new_len;
-
- const struct ndp_parser_opts *opts = ncm->parser_opts;
- const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
- const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
-
- /* Stop the timer */
- hrtimer_try_to_cancel(&ncm->task_timer);
-
- ndp_pad = ALIGN(ncm->skb_tx_data->len, ndp_align) -
- ncm->skb_tx_data->len;
- ndp_index = ncm->skb_tx_data->len + ndp_pad;
- new_len = ndp_index + dgram_idx_len + ncm->skb_tx_ndp->len;
-
- /* Set the final BlockLength and wNdpIndex */
- ntb_iter = (void *) ncm->skb_tx_data->data;
- /* Increment pointer to BlockLength */
- ntb_iter += 2 + 1 + 1;
- put_ncm(&ntb_iter, opts->block_length, new_len);
- put_ncm(&ntb_iter, opts->ndp_index, ndp_index);
-
- /* Set the final NDP wLength */
- new_len = opts->ndp_size +
- (ncm->ndp_dgram_count * dgram_idx_len);
- ncm->ndp_dgram_count = 0;
- /* Increment from start to wLength */
- ntb_iter = (void *) ncm->skb_tx_ndp->data;
- ntb_iter += 2;
- put_unaligned_le16(new_len, ntb_iter);
-
- /* Merge the skbs */
- swap(skb2, ncm->skb_tx_data);
- if (ncm->skb_tx_data) {
- dev_kfree_skb_any(ncm->skb_tx_data);
- ncm->skb_tx_data = NULL;
- }
-
- /* Insert NDP alignment. */
- ntb_iter = (void *) skb_put(skb2, ndp_pad);
- memset(ntb_iter, 0, ndp_pad);
-
- /* Copy NTB across. */
- ntb_iter = (void *) skb_put(skb2, ncm->skb_tx_ndp->len);
- memcpy(ntb_iter, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len);
- dev_kfree_skb_any(ncm->skb_tx_ndp);
- ncm->skb_tx_ndp = NULL;
-
- /* Insert zero'd datagram. */
- ntb_iter = (void *) skb_put(skb2, dgram_idx_len);
- memset(ntb_iter, 0, dgram_idx_len);
-
- return skb2;
-}
-
-static struct sk_buff *ncm_wrap_ntb(struct gether *port,
- struct sk_buff *skb)
-{
- struct f_ncm *ncm = func_to_ncm(&port->func);
- struct sk_buff *skb2 = NULL;
- int ncb_len = 0;
- __le16 *ntb_data;
- __le16 *ntb_ndp;
- int dgram_pad;
-
- unsigned max_size = ncm->port.fixed_in_len;
- const struct ndp_parser_opts *opts = ncm->parser_opts;
- const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
- const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
- const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder);
- const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
-
- if (!skb && !ncm->skb_tx_data)
- return NULL;
-
- if (skb) {
- /* Add the CRC if required up front */
- if (ncm->is_crc) {
- uint32_t crc;
- __le16 *crc_pos;
-
- crc = ~crc32_le(~0,
- skb->data,
- skb->len);
- crc_pos = (void *) skb_put(skb, sizeof(uint32_t));
- put_unaligned_le32(crc, crc_pos);
- }
-
- /* If the new skb is too big for the current NCM NTB then
- * set the current stored skb to be sent now and clear it
- * ready for new data.
- * NOTE: Assume maximum align for speed of calculation.
- */
- if (ncm->skb_tx_data
- && (ncm->ndp_dgram_count >= TX_MAX_NUM_DPE
- || (ncm->skb_tx_data->len +
- div + rem + skb->len +
- ncm->skb_tx_ndp->len + ndp_align + (2 * dgram_idx_len))
- > max_size)) {
- skb2 = package_for_tx(ncm);
- if (!skb2)
- goto err;
- }
-
- if (!ncm->skb_tx_data) {
- ncb_len = opts->nth_size;
- dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
- ncb_len += dgram_pad;
-
- /* Create a new skb for the NTH and datagrams. */
- ncm->skb_tx_data = alloc_skb(max_size, GFP_ATOMIC);
- if (!ncm->skb_tx_data)
- goto err;
-
- ntb_data = (void *) skb_put(ncm->skb_tx_data, ncb_len);
- memset(ntb_data, 0, ncb_len);
- /* dwSignature */
- put_unaligned_le32(opts->nth_sign, ntb_data);
- ntb_data += 2;
- /* wHeaderLength */
- put_unaligned_le16(opts->nth_size, ntb_data++);
-
- /* Allocate an skb for storing the NDP,
- * TX_MAX_NUM_DPE should easily suffice for a
- * 16k packet.
- */
- ncm->skb_tx_ndp = alloc_skb((int)(opts->ndp_size
- + opts->dpe_size
- * TX_MAX_NUM_DPE),
- GFP_ATOMIC);
- if (!ncm->skb_tx_ndp)
- goto err;
- ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp,
- opts->ndp_size);
- memset(ntb_ndp, 0, ncb_len);
- /* dwSignature */
- put_unaligned_le32(ncm->ndp_sign, ntb_ndp);
- ntb_ndp += 2;
-
- /* There is always a zeroed entry */
- ncm->ndp_dgram_count = 1;
-
- /* Note: we skip opts->next_ndp_index */
- }
-
- /* Delay the timer. */
- hrtimer_start(&ncm->task_timer,
- ktime_set(0, TX_TIMEOUT_NSECS),
- HRTIMER_MODE_REL);
-
- /* Add the datagram position entries */
- ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp, dgram_idx_len);
- memset(ntb_ndp, 0, dgram_idx_len);
-
- ncb_len = ncm->skb_tx_data->len;
- dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
- ncb_len += dgram_pad;
-
- /* (d)wDatagramIndex */
- put_ncm(&ntb_ndp, opts->dgram_item_len, ncb_len);
- /* (d)wDatagramLength */
- put_ncm(&ntb_ndp, opts->dgram_item_len, skb->len);
- ncm->ndp_dgram_count++;
-
- /* Add the new data to the skb */
- ntb_data = (void *) skb_put(ncm->skb_tx_data, dgram_pad);
- memset(ntb_data, 0, dgram_pad);
- ntb_data = (void *) skb_put(ncm->skb_tx_data, skb->len);
- memcpy(ntb_data, skb->data, skb->len);
- dev_kfree_skb_any(skb);
- skb = NULL;
-
- } else if (ncm->skb_tx_data && ncm->timer_force_tx) {
- /* If the tx was requested because of a timeout then send */
- skb2 = package_for_tx(ncm);
- if (!skb2)
- goto err;
- }
-
- return skb2;
-
-err:
- ncm->netdev->stats.tx_dropped++;
-
- if (skb)
- dev_kfree_skb_any(skb);
- if (ncm->skb_tx_data)
- dev_kfree_skb_any(ncm->skb_tx_data);
- if (ncm->skb_tx_ndp)
- dev_kfree_skb_any(ncm->skb_tx_ndp);
-
- return NULL;
-}
-
-/*
- * This transmits the NTB if there are frames waiting.
- */
-static void ncm_tx_tasklet(unsigned long data)
-{
- struct f_ncm *ncm = (void *)data;
-
- if (ncm->timer_stopping)
- return;
-
- /* Only send if data is available. */
- if (ncm->skb_tx_data) {
- ncm->timer_force_tx = true;
- ncm->netdev->netdev_ops->ndo_start_xmit(NULL, ncm->netdev);
- ncm->timer_force_tx = false;
- }
-}
-
-/*
- * The transmit should only be run if no skb data has been sent
- * for a certain duration.
- */
-static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data)
-{
- struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer);
- tasklet_schedule(&ncm->tx_tasklet);
- return HRTIMER_NORESTART;
-}
-
-static int ncm_unwrap_ntb(struct gether *port,
- struct sk_buff *skb,
- struct sk_buff_head *list)
-{
- struct f_ncm *ncm = func_to_ncm(&port->func);
- __le16 *tmp = (void *) skb->data;
- unsigned index, index2;
- int ndp_index;
- unsigned dg_len, dg_len2;
- unsigned ndp_len;
- struct sk_buff *skb2;
- int ret = -EINVAL;
- unsigned max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
- const struct ndp_parser_opts *opts = ncm->parser_opts;
- unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
- int dgram_counter;
-
- /* dwSignature */
- if (get_unaligned_le32(tmp) != opts->nth_sign) {
- INFO(port->func.config->cdev, "Wrong NTH SIGN, skblen %d\n",
- skb->len);
- print_hex_dump(KERN_INFO, "HEAD:", DUMP_PREFIX_ADDRESS, 32, 1,
- skb->data, 32, false);
-
- goto err;
- }
- tmp += 2;
- /* wHeaderLength */
- if (get_unaligned_le16(tmp++) != opts->nth_size) {
- INFO(port->func.config->cdev, "Wrong NTB headersize\n");
- goto err;
- }
- tmp++; /* skip wSequence */
-
- /* (d)wBlockLength */
- if (get_ncm(&tmp, opts->block_length) > max_size) {
- INFO(port->func.config->cdev, "OUT size exceeded\n");
- goto err;
- }
-
- ndp_index = get_ncm(&tmp, opts->ndp_index);
-
- /* Run through all the NDP's in the NTB */
- do {
- /* NCM 3.2 */
- if (((ndp_index % 4) != 0) &&
- (ndp_index < opts->nth_size)) {
- INFO(port->func.config->cdev, "Bad index: %#X\n",
- ndp_index);
- goto err;
- }
-
- /* walk through NDP */
- tmp = (void *)(skb->data + ndp_index);
- if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
- INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
- goto err;
- }
- tmp += 2;
-
- ndp_len = get_unaligned_le16(tmp++);
- /*
- * NCM 3.3.1
- * entry is 2 items
- * item size is 16/32 bits, opts->dgram_item_len * 2 bytes
- * minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry
- * Each entry is a dgram index and a dgram length.
- */
- if ((ndp_len < opts->ndp_size
- + 2 * 2 * (opts->dgram_item_len * 2))
- || (ndp_len % opts->ndplen_align != 0)) {
- INFO(port->func.config->cdev, "Bad NDP length: %#X\n",
- ndp_len);
- goto err;
- }
- tmp += opts->reserved1;
- /* Check for another NDP (d)wNextNdpIndex */
- ndp_index = get_ncm(&tmp, opts->next_ndp_index);
- tmp += opts->reserved2;
-
- ndp_len -= opts->ndp_size;
- index2 = get_ncm(&tmp, opts->dgram_item_len);
- dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
- dgram_counter = 0;
-
- do {
- index = index2;
- dg_len = dg_len2;
- if (dg_len < 14 + crc_len) { /* ethernet hdr + crc */
- INFO(port->func.config->cdev,
- "Bad dgram length: %#X\n", dg_len);
- goto err;
- }
- if (ncm->is_crc) {
- uint32_t crc, crc2;
-
- crc = get_unaligned_le32(skb->data +
- index + dg_len -
- crc_len);
- crc2 = ~crc32_le(~0,
- skb->data + index,
- dg_len - crc_len);
- if (crc != crc2) {
- INFO(port->func.config->cdev,
- "Bad CRC\n");
- goto err;
- }
- }
-
- index2 = get_ncm(&tmp, opts->dgram_item_len);
- dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
-
- /*
- * Copy the data into a new skb.
- * This ensures the truesize is correct
- */
- skb2 = netdev_alloc_skb_ip_align(ncm->netdev,
- dg_len - crc_len);
- if (skb2 == NULL)
- goto err;
- memcpy(skb_put(skb2, dg_len - crc_len),
- skb->data + index, dg_len - crc_len);
-
- skb_queue_tail(list, skb2);
-
- ndp_len -= 2 * (opts->dgram_item_len * 2);
-
- dgram_counter++;
-
- if (index2 == 0 || dg_len2 == 0)
- break;
- } while (ndp_len > 2 * (opts->dgram_item_len * 2));
- } while (ndp_index);
-
- dev_kfree_skb_any(skb);
-
- VDBG(port->func.config->cdev,
- "Parsed NTB with %d frames\n", dgram_counter);
- return 0;
-err:
- skb_queue_purge(list);
- dev_kfree_skb_any(skb);
- return ret;
-}
-
-static void ncm_disable(struct usb_function *f)
-{
- struct f_ncm *ncm = func_to_ncm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "ncm deactivated\n");
-
- if (ncm->port.in_ep->driver_data) {
- ncm->timer_stopping = true;
- ncm->netdev = NULL;
- gether_disconnect(&ncm->port);
- }
-
- if (ncm->notify->driver_data) {
- usb_ep_disable(ncm->notify);
- ncm->notify->driver_data = NULL;
- ncm->notify->desc = NULL;
- }
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Callbacks let us notify the host about connect/disconnect when the
- * net device is opened or closed.
- *
- * For testing, note that link states on this side include both opened
- * and closed variants of:
- *
- * - disconnected/unconfigured
- * - configured but inactive (data alt 0)
- * - configured and active (data alt 1)
- *
- * Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and
- * SET_INTERFACE (altsetting). Remember also that "configured" doesn't
- * imply the host is actually polling the notification endpoint, and
- * likewise that "active" doesn't imply it's actually using the data
- * endpoints for traffic.
- */
-
-static void ncm_open(struct gether *geth)
-{
- struct f_ncm *ncm = func_to_ncm(&geth->func);
-
- DBG(ncm->port.func.config->cdev, "%s\n", __func__);
-
- spin_lock(&ncm->lock);
- ncm->is_open = true;
- ncm_notify(ncm);
- spin_unlock(&ncm->lock);
-}
-
-static void ncm_close(struct gether *geth)
-{
- struct f_ncm *ncm = func_to_ncm(&geth->func);
-
- DBG(ncm->port.func.config->cdev, "%s\n", __func__);
-
- spin_lock(&ncm->lock);
- ncm->is_open = false;
- ncm_notify(ncm);
- spin_unlock(&ncm->lock);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* ethernet function driver setup/binding */
-
-static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_ncm *ncm = func_to_ncm(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
- struct f_ncm_opts *ncm_opts;
-
- if (!can_support_ecm(cdev->gadget))
- return -EINVAL;
-
- ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to ncm_opts->bound access
- */
- if (!ncm_opts->bound) {
- mutex_lock(&ncm_opts->lock);
- gether_set_gadget(ncm_opts->net, cdev->gadget);
- status = gether_register_netdev(ncm_opts->net);
- mutex_unlock(&ncm_opts->lock);
- if (status)
- return status;
- ncm_opts->bound = true;
- }
- us = usb_gstrings_attach(cdev, ncm_strings,
- ARRAY_SIZE(ncm_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
- ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id;
- ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id;
- ncm_data_intf.iInterface = us[STRING_DATA_IDX].id;
- ecm_desc.iMACAddress = us[STRING_MAC_IDX].id;
- ncm_iad_desc.iFunction = us[STRING_IAD_IDX].id;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ncm->ctrl_id = status;
- ncm_iad_desc.bFirstInterface = status;
-
- ncm_control_intf.bInterfaceNumber = status;
- ncm_union_desc.bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ncm->data_id = status;
-
- ncm_data_nop_intf.bInterfaceNumber = status;
- ncm_data_intf.bInterfaceNumber = status;
- ncm_union_desc.bSlaveInterface0 = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_in_desc);
- if (!ep)
- goto fail;
- ncm->port.in_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_out_desc);
- if (!ep)
- goto fail;
- ncm->port.out_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_notify_desc);
- if (!ep)
- goto fail;
- ncm->notify = ep;
- ep->driver_data = cdev; /* claim */
-
- status = -ENOMEM;
-
- /* allocate notification request and buffer */
- ncm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
- if (!ncm->notify_req)
- goto fail;
- ncm->notify_req->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL);
- if (!ncm->notify_req->buf)
- goto fail;
- ncm->notify_req->context = ncm;
- ncm->notify_req->complete = ncm_notify_complete;
-
- /*
- * support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- hs_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
- hs_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
- hs_ncm_notify_desc.bEndpointAddress =
- fs_ncm_notify_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function,
- NULL);
- /*
- * NOTE: all that is done without knowing or caring about
- * the network link ... which is unavailable to this code
- * until we're activated via set_alt().
- */
-
- ncm->port.open = ncm_open;
- ncm->port.close = ncm_close;
-
- tasklet_init(&ncm->tx_tasklet, ncm_tx_tasklet, (unsigned long) ncm);
- hrtimer_init(&ncm->task_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
- ncm->task_timer.function = ncm_tx_timeout;
-
- DBG(cdev, "CDC Network: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- ncm->port.in_ep->name, ncm->port.out_ep->name,
- ncm->notify->name);
- return 0;
-
-fail:
- usb_free_all_descriptors(f);
- if (ncm->notify_req) {
- kfree(ncm->notify_req->buf);
- usb_ep_free_request(ncm->notify, ncm->notify_req);
- }
-
- /* we might as well release our claims on endpoints */
- if (ncm->notify)
- ncm->notify->driver_data = NULL;
- if (ncm->port.out_ep)
- ncm->port.out_ep->driver_data = NULL;
- if (ncm->port.in_ep)
- ncm->port.in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-static inline struct f_ncm_opts *to_f_ncm_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_ncm_opts,
- func_inst.group);
-}
-
-/* f_ncm_item_ops */
-USB_ETHERNET_CONFIGFS_ITEM(ncm);
-
-/* f_ncm_opts_dev_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ncm);
-
-/* f_ncm_opts_host_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ncm);
-
-/* f_ncm_opts_qmult */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ncm);
-
-/* f_ncm_opts_ifname */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ncm);
-
-static struct configfs_attribute *ncm_attrs[] = {
- &f_ncm_opts_dev_addr.attr,
- &f_ncm_opts_host_addr.attr,
- &f_ncm_opts_qmult.attr,
- &f_ncm_opts_ifname.attr,
- NULL,
-};
-
-static struct config_item_type ncm_func_type = {
- .ct_item_ops = &ncm_item_ops,
- .ct_attrs = ncm_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void ncm_free_inst(struct usb_function_instance *f)
-{
- struct f_ncm_opts *opts;
-
- opts = container_of(f, struct f_ncm_opts, func_inst);
- if (opts->bound)
- gether_cleanup(netdev_priv(opts->net));
- else
- free_netdev(opts->net);
- kfree(opts);
-}
-
-static struct usb_function_instance *ncm_alloc_inst(void)
-{
- struct f_ncm_opts *opts;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&opts->lock);
- opts->func_inst.free_func_inst = ncm_free_inst;
- opts->net = gether_setup_default();
- if (IS_ERR(opts->net)) {
- struct net_device *net = opts->net;
- kfree(opts);
- return ERR_CAST(net);
- }
-
- config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type);
-
- return &opts->func_inst;
-}
-
-static void ncm_free(struct usb_function *f)
-{
- struct f_ncm *ncm;
- struct f_ncm_opts *opts;
-
- ncm = func_to_ncm(f);
- opts = container_of(f->fi, struct f_ncm_opts, func_inst);
- kfree(ncm);
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-}
-
-static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_ncm *ncm = func_to_ncm(f);
-
- DBG(c->cdev, "ncm unbind\n");
-
- hrtimer_cancel(&ncm->task_timer);
- tasklet_kill(&ncm->tx_tasklet);
-
- ncm_string_defs[0].id = 0;
- usb_free_all_descriptors(f);
-
- kfree(ncm->notify_req->buf);
- usb_ep_free_request(ncm->notify, ncm->notify_req);
-}
-
-static struct usb_function *ncm_alloc(struct usb_function_instance *fi)
-{
- struct f_ncm *ncm;
- struct f_ncm_opts *opts;
- int status;
-
- /* allocate and initialize one new instance */
- ncm = kzalloc(sizeof(*ncm), GFP_KERNEL);
- if (!ncm)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_ncm_opts, func_inst);
- mutex_lock(&opts->lock);
- opts->refcnt++;
-
- /* export host's Ethernet address in CDC format */
- status = gether_get_host_addr_cdc(opts->net, ncm->ethaddr,
- sizeof(ncm->ethaddr));
- if (status < 12) { /* strlen("01234567890a") */
- kfree(ncm);
- mutex_unlock(&opts->lock);
- return ERR_PTR(-EINVAL);
- }
- ncm_string_defs[STRING_MAC_IDX].s = ncm->ethaddr;
-
- spin_lock_init(&ncm->lock);
- ncm_reset_values(ncm);
- ncm->port.ioport = netdev_priv(opts->net);
- mutex_unlock(&opts->lock);
- ncm->port.is_fixed = true;
- ncm->port.supports_multi_frame = true;
-
- ncm->port.func.name = "cdc_network";
- /* descriptors are per-instance copies */
- ncm->port.func.bind = ncm_bind;
- ncm->port.func.unbind = ncm_unbind;
- ncm->port.func.set_alt = ncm_set_alt;
- ncm->port.func.get_alt = ncm_get_alt;
- ncm->port.func.setup = ncm_setup;
- ncm->port.func.disable = ncm_disable;
- ncm->port.func.free_func = ncm_free;
-
- ncm->port.wrap = ncm_wrap_ntb;
- ncm->port.unwrap = ncm_unwrap_ntb;
-
- return &ncm->port.func;
-}
-
-DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Yauheni Kaliuta");
+++ /dev/null
-/*
- * f_obex.c -- USB CDC OBEX function driver
- *
- * Copyright (C) 2008 Nokia Corporation
- * Contact: Felipe Balbi <felipe.balbi@nokia.com>
- *
- * Based on f_acm.c by Al Borchers and David Brownell.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/module.h>
-
-#include "u_serial.h"
-#include "gadget_chips.h"
-
-
-/*
- * This CDC OBEX function support just packages a TTY-ish byte stream.
- * A user mode server will put it into "raw" mode and handle all the
- * relevant protocol details ... this is just a kernel passthrough.
- * When possible, we prevent gadget enumeration until that server is
- * ready to handle the commands.
- */
-
-struct f_obex {
- struct gserial port;
- u8 ctrl_id;
- u8 data_id;
- u8 port_num;
- u8 can_activate;
-};
-
-static inline struct f_obex *func_to_obex(struct usb_function *f)
-{
- return container_of(f, struct f_obex, port.func);
-}
-
-static inline struct f_obex *port_to_obex(struct gserial *p)
-{
- return container_of(p, struct f_obex, port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define OBEX_CTRL_IDX 0
-#define OBEX_DATA_IDX 1
-
-static struct usb_string obex_string_defs[] = {
- [OBEX_CTRL_IDX].s = "CDC Object Exchange (OBEX)",
- [OBEX_DATA_IDX].s = "CDC OBEX Data",
- { }, /* end of list */
-};
-
-static struct usb_gadget_strings obex_string_table = {
- .language = 0x0409, /* en-US */
- .strings = obex_string_defs,
-};
-
-static struct usb_gadget_strings *obex_strings[] = {
- &obex_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_interface_descriptor obex_control_intf = {
- .bLength = sizeof(obex_control_intf),
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = 0,
-
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_OBEX,
-};
-
-static struct usb_interface_descriptor obex_data_nop_intf = {
- .bLength = sizeof(obex_data_nop_intf),
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = 1,
-
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
-};
-
-static struct usb_interface_descriptor obex_data_intf = {
- .bLength = sizeof(obex_data_intf),
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = 2,
-
- .bAlternateSetting = 1,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
-};
-
-static struct usb_cdc_header_desc obex_cdc_header_desc = {
- .bLength = sizeof(obex_cdc_header_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
- .bcdCDC = cpu_to_le16(0x0120),
-};
-
-static struct usb_cdc_union_desc obex_cdc_union_desc = {
- .bLength = sizeof(obex_cdc_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- .bMasterInterface0 = 1,
- .bSlaveInterface0 = 2,
-};
-
-static struct usb_cdc_obex_desc obex_desc = {
- .bLength = sizeof(obex_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_OBEX_TYPE,
- .bcdVersion = cpu_to_le16(0x0100),
-};
-
-/* High-Speed Support */
-
-static struct usb_endpoint_descriptor obex_hs_ep_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor obex_hs_ep_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *hs_function[] = {
- (struct usb_descriptor_header *) &obex_control_intf,
- (struct usb_descriptor_header *) &obex_cdc_header_desc,
- (struct usb_descriptor_header *) &obex_desc,
- (struct usb_descriptor_header *) &obex_cdc_union_desc,
-
- (struct usb_descriptor_header *) &obex_data_nop_intf,
- (struct usb_descriptor_header *) &obex_data_intf,
- (struct usb_descriptor_header *) &obex_hs_ep_in_desc,
- (struct usb_descriptor_header *) &obex_hs_ep_out_desc,
- NULL,
-};
-
-/* Full-Speed Support */
-
-static struct usb_endpoint_descriptor obex_fs_ep_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor obex_fs_ep_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *fs_function[] = {
- (struct usb_descriptor_header *) &obex_control_intf,
- (struct usb_descriptor_header *) &obex_cdc_header_desc,
- (struct usb_descriptor_header *) &obex_desc,
- (struct usb_descriptor_header *) &obex_cdc_union_desc,
-
- (struct usb_descriptor_header *) &obex_data_nop_intf,
- (struct usb_descriptor_header *) &obex_data_intf,
- (struct usb_descriptor_header *) &obex_fs_ep_in_desc,
- (struct usb_descriptor_header *) &obex_fs_ep_out_desc,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int obex_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_obex *obex = func_to_obex(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- if (intf == obex->ctrl_id) {
- if (alt != 0)
- goto fail;
- /* NOP */
- DBG(cdev, "reset obex ttyGS%d control\n", obex->port_num);
-
- } else if (intf == obex->data_id) {
- if (alt > 1)
- goto fail;
-
- if (obex->port.in->driver_data) {
- DBG(cdev, "reset obex ttyGS%d\n", obex->port_num);
- gserial_disconnect(&obex->port);
- }
-
- if (!obex->port.in->desc || !obex->port.out->desc) {
- DBG(cdev, "init obex ttyGS%d\n", obex->port_num);
- if (config_ep_by_speed(cdev->gadget, f,
- obex->port.in) ||
- config_ep_by_speed(cdev->gadget, f,
- obex->port.out)) {
- obex->port.out->desc = NULL;
- obex->port.in->desc = NULL;
- goto fail;
- }
- }
-
- if (alt == 1) {
- DBG(cdev, "activate obex ttyGS%d\n", obex->port_num);
- gserial_connect(&obex->port, obex->port_num);
- }
-
- } else
- goto fail;
-
- return 0;
-
-fail:
- return -EINVAL;
-}
-
-static int obex_get_alt(struct usb_function *f, unsigned intf)
-{
- struct f_obex *obex = func_to_obex(f);
-
- if (intf == obex->ctrl_id)
- return 0;
-
- return obex->port.in->driver_data ? 1 : 0;
-}
-
-static void obex_disable(struct usb_function *f)
-{
- struct f_obex *obex = func_to_obex(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "obex ttyGS%d disable\n", obex->port_num);
- gserial_disconnect(&obex->port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void obex_connect(struct gserial *g)
-{
- struct f_obex *obex = port_to_obex(g);
- struct usb_composite_dev *cdev = g->func.config->cdev;
- int status;
-
- if (!obex->can_activate)
- return;
-
- status = usb_function_activate(&g->func);
- if (status)
- DBG(cdev, "obex ttyGS%d function activate --> %d\n",
- obex->port_num, status);
-}
-
-static void obex_disconnect(struct gserial *g)
-{
- struct f_obex *obex = port_to_obex(g);
- struct usb_composite_dev *cdev = g->func.config->cdev;
- int status;
-
- if (!obex->can_activate)
- return;
-
- status = usb_function_deactivate(&g->func);
- if (status)
- DBG(cdev, "obex ttyGS%d function deactivate --> %d\n",
- obex->port_num, status);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* Some controllers can't support CDC OBEX ... */
-static inline bool can_support_obex(struct usb_configuration *c)
-{
- /* Since the first interface is a NOP, we can ignore the
- * issue of multi-interface support on most controllers.
- *
- * Altsettings are mandatory, however...
- */
- if (!gadget_supports_altsettings(c->cdev->gadget))
- return false;
-
- /* everything else is *probably* fine ... */
- return true;
-}
-
-static int obex_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_obex *obex = func_to_obex(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
-
- if (!can_support_obex(c))
- return -EINVAL;
-
- us = usb_gstrings_attach(cdev, obex_strings,
- ARRAY_SIZE(obex_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
- obex_control_intf.iInterface = us[OBEX_CTRL_IDX].id;
- obex_data_nop_intf.iInterface = us[OBEX_DATA_IDX].id;
- obex_data_intf.iInterface = us[OBEX_DATA_IDX].id;
-
- /* allocate instance-specific interface IDs, and patch descriptors */
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- obex->ctrl_id = status;
-
- obex_control_intf.bInterfaceNumber = status;
- obex_cdc_union_desc.bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- obex->data_id = status;
-
- obex_data_nop_intf.bInterfaceNumber = status;
- obex_data_intf.bInterfaceNumber = status;
- obex_cdc_union_desc.bSlaveInterface0 = status;
-
- /* allocate instance-specific endpoints */
-
- status = -ENODEV;
- ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_in_desc);
- if (!ep)
- goto fail;
- obex->port.in = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_out_desc);
- if (!ep)
- goto fail;
- obex->port.out = ep;
- ep->driver_data = cdev; /* claim */
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
-
- obex_hs_ep_in_desc.bEndpointAddress =
- obex_fs_ep_in_desc.bEndpointAddress;
- obex_hs_ep_out_desc.bEndpointAddress =
- obex_fs_ep_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, fs_function, hs_function, NULL);
- if (status)
- goto fail;
-
- /* Avoid letting this gadget enumerate until the userspace
- * OBEX server is active.
- */
- status = usb_function_deactivate(f);
- if (status < 0)
- WARNING(cdev, "obex ttyGS%d: can't prevent enumeration, %d\n",
- obex->port_num, status);
- else
- obex->can_activate = true;
-
-
- DBG(cdev, "obex ttyGS%d: %s speed IN/%s OUT/%s\n",
- obex->port_num,
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- obex->port.in->name, obex->port.out->name);
-
- return 0;
-
-fail:
- usb_free_all_descriptors(f);
- /* we might as well release our claims on endpoints */
- if (obex->port.out)
- obex->port.out->driver_data = NULL;
- if (obex->port.in)
- obex->port.in->driver_data = NULL;
-
- ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
-
- return status;
-}
-
-static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_serial_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_serial_opts);
-static ssize_t f_obex_attr_show(struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
-{
- struct f_serial_opts *opts = to_f_serial_opts(item);
- struct f_serial_opts_attribute *f_serial_opts_attr =
- container_of(attr, struct f_serial_opts_attribute, attr);
- ssize_t ret = 0;
-
- if (f_serial_opts_attr->show)
- ret = f_serial_opts_attr->show(opts, page);
-
- return ret;
-}
-
-static void obex_attr_release(struct config_item *item)
-{
- struct f_serial_opts *opts = to_f_serial_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations obex_item_ops = {
- .release = obex_attr_release,
- .show_attribute = f_obex_attr_show,
-};
-
-static ssize_t f_obex_port_num_show(struct f_serial_opts *opts, char *page)
-{
- return sprintf(page, "%u\n", opts->port_num);
-}
-
-static struct f_serial_opts_attribute f_obex_port_num =
- __CONFIGFS_ATTR_RO(port_num, f_obex_port_num_show);
-
-static struct configfs_attribute *acm_attrs[] = {
- &f_obex_port_num.attr,
- NULL,
-};
-
-static struct config_item_type obex_func_type = {
- .ct_item_ops = &obex_item_ops,
- .ct_attrs = acm_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void obex_free_inst(struct usb_function_instance *f)
-{
- struct f_serial_opts *opts;
-
- opts = container_of(f, struct f_serial_opts, func_inst);
- gserial_free_line(opts->port_num);
- kfree(opts);
-}
-
-static struct usb_function_instance *obex_alloc_inst(void)
-{
- struct f_serial_opts *opts;
- int ret;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
-
- opts->func_inst.free_func_inst = obex_free_inst;
- ret = gserial_alloc_line(&opts->port_num);
- if (ret) {
- kfree(opts);
- return ERR_PTR(ret);
- }
- config_group_init_type_name(&opts->func_inst.group, "",
- &obex_func_type);
-
- return &opts->func_inst;
-}
-
-static void obex_free(struct usb_function *f)
-{
- struct f_obex *obex;
-
- obex = func_to_obex(f);
- kfree(obex);
-}
-
-static void obex_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- usb_free_all_descriptors(f);
-}
-
-static struct usb_function *obex_alloc(struct usb_function_instance *fi)
-{
- struct f_obex *obex;
- struct f_serial_opts *opts;
-
- /* allocate and initialize one new instance */
- obex = kzalloc(sizeof(*obex), GFP_KERNEL);
- if (!obex)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_serial_opts, func_inst);
-
- obex->port_num = opts->port_num;
-
- obex->port.connect = obex_connect;
- obex->port.disconnect = obex_disconnect;
-
- obex->port.func.name = "obex";
- /* descriptors are per-instance copies */
- obex->port.func.bind = obex_bind;
- obex->port.func.unbind = obex_unbind;
- obex->port.func.set_alt = obex_set_alt;
- obex->port.func.get_alt = obex_get_alt;
- obex->port.func.disable = obex_disable;
- obex->port.func.free_func = obex_free;
-
- return &obex->port.func;
-}
-
-DECLARE_USB_FUNCTION_INIT(obex, obex_alloc_inst, obex_alloc);
-MODULE_AUTHOR("Felipe Balbi");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * f_phonet.c -- USB CDC Phonet function
- *
- * Copyright (C) 2007-2008 Nokia Corporation. All rights reserved.
- *
- * Author: Rémi Denis-Courmont
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- */
-
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-
-#include <linux/netdevice.h>
-#include <linux/if_ether.h>
-#include <linux/if_phonet.h>
-#include <linux/if_arp.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/cdc.h>
-#include <linux/usb/composite.h>
-
-#include "u_phonet.h"
-#include "u_ether.h"
-
-#define PN_MEDIA_USB 0x1B
-#define MAXPACKET 512
-#if (PAGE_SIZE % MAXPACKET)
-#error MAXPACKET must divide PAGE_SIZE!
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-struct phonet_port {
- struct f_phonet *usb;
- spinlock_t lock;
-};
-
-struct f_phonet {
- struct usb_function function;
- struct {
- struct sk_buff *skb;
- spinlock_t lock;
- } rx;
- struct net_device *dev;
- struct usb_ep *in_ep, *out_ep;
-
- struct usb_request *in_req;
- struct usb_request *out_reqv[0];
-};
-
-static int phonet_rxq_size = 17;
-
-static inline struct f_phonet *func_to_pn(struct usb_function *f)
-{
- return container_of(f, struct f_phonet, function);
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define USB_CDC_SUBCLASS_PHONET 0xfe
-#define USB_CDC_PHONET_TYPE 0xab
-
-static struct usb_interface_descriptor
-pn_control_intf_desc = {
- .bLength = sizeof pn_control_intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC, */
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_PHONET,
-};
-
-static const struct usb_cdc_header_desc
-pn_header_desc = {
- .bLength = sizeof pn_header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static const struct usb_cdc_header_desc
-pn_phonet_desc = {
- .bLength = sizeof pn_phonet_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_PHONET_TYPE,
- .bcdCDC = cpu_to_le16(0x1505), /* ??? */
-};
-
-static struct usb_cdc_union_desc
-pn_union_desc = {
- .bLength = sizeof pn_union_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
-
- /* .bMasterInterface0 = DYNAMIC, */
- /* .bSlaveInterface0 = DYNAMIC, */
-};
-
-static struct usb_interface_descriptor
-pn_data_nop_intf_desc = {
- .bLength = sizeof pn_data_nop_intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC, */
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
-};
-
-static struct usb_interface_descriptor
-pn_data_intf_desc = {
- .bLength = sizeof pn_data_intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC, */
- .bAlternateSetting = 1,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
-};
-
-static struct usb_endpoint_descriptor
-pn_fs_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor
-pn_hs_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(MAXPACKET),
-};
-
-static struct usb_endpoint_descriptor
-pn_fs_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor
-pn_hs_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *fs_pn_function[] = {
- (struct usb_descriptor_header *) &pn_control_intf_desc,
- (struct usb_descriptor_header *) &pn_header_desc,
- (struct usb_descriptor_header *) &pn_phonet_desc,
- (struct usb_descriptor_header *) &pn_union_desc,
- (struct usb_descriptor_header *) &pn_data_nop_intf_desc,
- (struct usb_descriptor_header *) &pn_data_intf_desc,
- (struct usb_descriptor_header *) &pn_fs_sink_desc,
- (struct usb_descriptor_header *) &pn_fs_source_desc,
- NULL,
-};
-
-static struct usb_descriptor_header *hs_pn_function[] = {
- (struct usb_descriptor_header *) &pn_control_intf_desc,
- (struct usb_descriptor_header *) &pn_header_desc,
- (struct usb_descriptor_header *) &pn_phonet_desc,
- (struct usb_descriptor_header *) &pn_union_desc,
- (struct usb_descriptor_header *) &pn_data_nop_intf_desc,
- (struct usb_descriptor_header *) &pn_data_intf_desc,
- (struct usb_descriptor_header *) &pn_hs_sink_desc,
- (struct usb_descriptor_header *) &pn_hs_source_desc,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int pn_net_open(struct net_device *dev)
-{
- netif_wake_queue(dev);
- return 0;
-}
-
-static int pn_net_close(struct net_device *dev)
-{
- netif_stop_queue(dev);
- return 0;
-}
-
-static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_phonet *fp = ep->driver_data;
- struct net_device *dev = fp->dev;
- struct sk_buff *skb = req->context;
-
- switch (req->status) {
- case 0:
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
- break;
-
- case -ESHUTDOWN: /* disconnected */
- case -ECONNRESET: /* disabled */
- dev->stats.tx_aborted_errors++;
- default:
- dev->stats.tx_errors++;
- }
-
- dev_kfree_skb_any(skb);
- netif_wake_queue(dev);
-}
-
-static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct phonet_port *port = netdev_priv(dev);
- struct f_phonet *fp;
- struct usb_request *req;
- unsigned long flags;
-
- if (skb->protocol != htons(ETH_P_PHONET))
- goto out;
-
- spin_lock_irqsave(&port->lock, flags);
- fp = port->usb;
- if (unlikely(!fp)) /* race with carrier loss */
- goto out_unlock;
-
- req = fp->in_req;
- req->buf = skb->data;
- req->length = skb->len;
- req->complete = pn_tx_complete;
- req->zero = 1;
- req->context = skb;
-
- if (unlikely(usb_ep_queue(fp->in_ep, req, GFP_ATOMIC)))
- goto out_unlock;
-
- netif_stop_queue(dev);
- skb = NULL;
-
-out_unlock:
- spin_unlock_irqrestore(&port->lock, flags);
-out:
- if (unlikely(skb)) {
- dev_kfree_skb(skb);
- dev->stats.tx_dropped++;
- }
- return NETDEV_TX_OK;
-}
-
-static int pn_net_mtu(struct net_device *dev, int new_mtu)
-{
- if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU))
- return -EINVAL;
- dev->mtu = new_mtu;
- return 0;
-}
-
-static const struct net_device_ops pn_netdev_ops = {
- .ndo_open = pn_net_open,
- .ndo_stop = pn_net_close,
- .ndo_start_xmit = pn_net_xmit,
- .ndo_change_mtu = pn_net_mtu,
-};
-
-static void pn_net_setup(struct net_device *dev)
-{
- dev->features = 0;
- dev->type = ARPHRD_PHONET;
- dev->flags = IFF_POINTOPOINT | IFF_NOARP;
- dev->mtu = PHONET_DEV_MTU;
- dev->hard_header_len = 1;
- dev->dev_addr[0] = PN_MEDIA_USB;
- dev->addr_len = 1;
- dev->tx_queue_len = 1;
-
- dev->netdev_ops = &pn_netdev_ops;
- dev->destructor = free_netdev;
- dev->header_ops = &phonet_header_ops;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Queue buffer for data from the host
- */
-static int
-pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags)
-{
- struct page *page;
- int err;
-
- page = __skb_alloc_page(gfp_flags | __GFP_NOMEMALLOC, NULL);
- if (!page)
- return -ENOMEM;
-
- req->buf = page_address(page);
- req->length = PAGE_SIZE;
- req->context = page;
-
- err = usb_ep_queue(fp->out_ep, req, gfp_flags);
- if (unlikely(err))
- put_page(page);
- return err;
-}
-
-static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_phonet *fp = ep->driver_data;
- struct net_device *dev = fp->dev;
- struct page *page = req->context;
- struct sk_buff *skb;
- unsigned long flags;
- int status = req->status;
-
- switch (status) {
- case 0:
- spin_lock_irqsave(&fp->rx.lock, flags);
- skb = fp->rx.skb;
- if (!skb)
- skb = fp->rx.skb = netdev_alloc_skb(dev, 12);
- if (req->actual < req->length) /* Last fragment */
- fp->rx.skb = NULL;
- spin_unlock_irqrestore(&fp->rx.lock, flags);
-
- if (unlikely(!skb))
- break;
-
- if (skb->len == 0) { /* First fragment */
- skb->protocol = htons(ETH_P_PHONET);
- skb_reset_mac_header(skb);
- /* Can't use pskb_pull() on page in IRQ */
- memcpy(skb_put(skb, 1), page_address(page), 1);
- }
-
- skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
- skb->len <= 1, req->actual, PAGE_SIZE);
- page = NULL;
-
- if (req->actual < req->length) { /* Last fragment */
- skb->dev = dev;
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += skb->len;
-
- netif_rx(skb);
- }
- break;
-
- /* Do not resubmit in these cases: */
- case -ESHUTDOWN: /* disconnect */
- case -ECONNABORTED: /* hw reset */
- case -ECONNRESET: /* dequeued (unlink or netif down) */
- req = NULL;
- break;
-
- /* Do resubmit in these cases: */
- case -EOVERFLOW: /* request buffer overflow */
- dev->stats.rx_over_errors++;
- default:
- dev->stats.rx_errors++;
- break;
- }
-
- if (page)
- put_page(page);
- if (req)
- pn_rx_submit(fp, req, GFP_ATOMIC | __GFP_COLD);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void __pn_reset(struct usb_function *f)
-{
- struct f_phonet *fp = func_to_pn(f);
- struct net_device *dev = fp->dev;
- struct phonet_port *port = netdev_priv(dev);
-
- netif_carrier_off(dev);
- port->usb = NULL;
-
- usb_ep_disable(fp->out_ep);
- usb_ep_disable(fp->in_ep);
- if (fp->rx.skb) {
- dev_kfree_skb_irq(fp->rx.skb);
- fp->rx.skb = NULL;
- }
-}
-
-static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_phonet *fp = func_to_pn(f);
- struct usb_gadget *gadget = fp->function.config->cdev->gadget;
-
- if (intf == pn_control_intf_desc.bInterfaceNumber)
- /* control interface, no altsetting */
- return (alt > 0) ? -EINVAL : 0;
-
- if (intf == pn_data_intf_desc.bInterfaceNumber) {
- struct net_device *dev = fp->dev;
- struct phonet_port *port = netdev_priv(dev);
-
- /* data intf (0: inactive, 1: active) */
- if (alt > 1)
- return -EINVAL;
-
- spin_lock(&port->lock);
- __pn_reset(f);
- if (alt == 1) {
- int i;
-
- if (config_ep_by_speed(gadget, f, fp->in_ep) ||
- config_ep_by_speed(gadget, f, fp->out_ep)) {
- fp->in_ep->desc = NULL;
- fp->out_ep->desc = NULL;
- spin_unlock(&port->lock);
- return -EINVAL;
- }
- usb_ep_enable(fp->out_ep);
- usb_ep_enable(fp->in_ep);
-
- port->usb = fp;
- fp->out_ep->driver_data = fp;
- fp->in_ep->driver_data = fp;
-
- netif_carrier_on(dev);
- for (i = 0; i < phonet_rxq_size; i++)
- pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC | __GFP_COLD);
- }
- spin_unlock(&port->lock);
- return 0;
- }
-
- return -EINVAL;
-}
-
-static int pn_get_alt(struct usb_function *f, unsigned intf)
-{
- struct f_phonet *fp = func_to_pn(f);
-
- if (intf == pn_control_intf_desc.bInterfaceNumber)
- return 0;
-
- if (intf == pn_data_intf_desc.bInterfaceNumber) {
- struct phonet_port *port = netdev_priv(fp->dev);
- u8 alt;
-
- spin_lock(&port->lock);
- alt = port->usb != NULL;
- spin_unlock(&port->lock);
- return alt;
- }
-
- return -EINVAL;
-}
-
-static void pn_disconnect(struct usb_function *f)
-{
- struct f_phonet *fp = func_to_pn(f);
- struct phonet_port *port = netdev_priv(fp->dev);
- unsigned long flags;
-
- /* remain disabled until set_alt */
- spin_lock_irqsave(&port->lock, flags);
- __pn_reset(f);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int pn_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct usb_gadget *gadget = cdev->gadget;
- struct f_phonet *fp = func_to_pn(f);
- struct usb_ep *ep;
- int status, i;
-
- struct f_phonet_opts *phonet_opts;
-
- phonet_opts = container_of(f->fi, struct f_phonet_opts, func_inst);
-
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to phonet_opts->bound access
- */
- if (!phonet_opts->bound) {
- gphonet_set_gadget(phonet_opts->net, gadget);
- status = gphonet_register_netdev(phonet_opts->net);
- if (status)
- return status;
- phonet_opts->bound = true;
- }
-
- /* Reserve interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto err;
- pn_control_intf_desc.bInterfaceNumber = status;
- pn_union_desc.bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto err;
- pn_data_nop_intf_desc.bInterfaceNumber = status;
- pn_data_intf_desc.bInterfaceNumber = status;
- pn_union_desc.bSlaveInterface0 = status;
-
- /* Reserve endpoints */
- status = -ENODEV;
- ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc);
- if (!ep)
- goto err;
- fp->out_ep = ep;
- ep->driver_data = fp; /* Claim */
-
- ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc);
- if (!ep)
- goto err;
- fp->in_ep = ep;
- ep->driver_data = fp; /* Claim */
-
- pn_hs_sink_desc.bEndpointAddress = pn_fs_sink_desc.bEndpointAddress;
- pn_hs_source_desc.bEndpointAddress = pn_fs_source_desc.bEndpointAddress;
-
- /* Do not try to bind Phonet twice... */
- status = usb_assign_descriptors(f, fs_pn_function, hs_pn_function,
- NULL);
- if (status)
- goto err;
-
- /* Incoming USB requests */
- status = -ENOMEM;
- for (i = 0; i < phonet_rxq_size; i++) {
- struct usb_request *req;
-
- req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL);
- if (!req)
- goto err_req;
-
- req->complete = pn_rx_complete;
- fp->out_reqv[i] = req;
- }
-
- /* Outgoing USB requests */
- fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL);
- if (!fp->in_req)
- goto err_req;
-
- INFO(cdev, "USB CDC Phonet function\n");
- INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name,
- fp->out_ep->name, fp->in_ep->name);
- return 0;
-
-err_req:
- for (i = 0; i < phonet_rxq_size && fp->out_reqv[i]; i++)
- usb_ep_free_request(fp->out_ep, fp->out_reqv[i]);
-err:
- usb_free_all_descriptors(f);
- if (fp->out_ep)
- fp->out_ep->driver_data = NULL;
- if (fp->in_ep)
- fp->in_ep->driver_data = NULL;
- ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n");
- return status;
-}
-
-static inline struct f_phonet_opts *to_f_phonet_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_phonet_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_phonet_opts);
-static ssize_t f_phonet_attr_show(struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
-{
- struct f_phonet_opts *opts = to_f_phonet_opts(item);
- struct f_phonet_opts_attribute *f_phonet_opts_attr =
- container_of(attr, struct f_phonet_opts_attribute, attr);
- ssize_t ret = 0;
-
- if (f_phonet_opts_attr->show)
- ret = f_phonet_opts_attr->show(opts, page);
- return ret;
-}
-
-static void phonet_attr_release(struct config_item *item)
-{
- struct f_phonet_opts *opts = to_f_phonet_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations phonet_item_ops = {
- .release = phonet_attr_release,
- .show_attribute = f_phonet_attr_show,
-};
-
-static ssize_t f_phonet_ifname_show(struct f_phonet_opts *opts, char *page)
-{
- return gether_get_ifname(opts->net, page, PAGE_SIZE);
-}
-
-static struct f_phonet_opts_attribute f_phonet_ifname =
- __CONFIGFS_ATTR_RO(ifname, f_phonet_ifname_show);
-
-static struct configfs_attribute *phonet_attrs[] = {
- &f_phonet_ifname.attr,
- NULL,
-};
-
-static struct config_item_type phonet_func_type = {
- .ct_item_ops = &phonet_item_ops,
- .ct_attrs = phonet_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void phonet_free_inst(struct usb_function_instance *f)
-{
- struct f_phonet_opts *opts;
-
- opts = container_of(f, struct f_phonet_opts, func_inst);
- if (opts->bound)
- gphonet_cleanup(opts->net);
- else
- free_netdev(opts->net);
- kfree(opts);
-}
-
-static struct usb_function_instance *phonet_alloc_inst(void)
-{
- struct f_phonet_opts *opts;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
-
- opts->func_inst.free_func_inst = phonet_free_inst;
- opts->net = gphonet_setup_default();
- if (IS_ERR(opts->net)) {
- struct net_device *net = opts->net;
- kfree(opts);
- return ERR_CAST(net);
- }
-
- config_group_init_type_name(&opts->func_inst.group, "",
- &phonet_func_type);
-
- return &opts->func_inst;
-}
-
-static void phonet_free(struct usb_function *f)
-{
- struct f_phonet *phonet;
-
- phonet = func_to_pn(f);
- kfree(phonet);
-}
-
-static void pn_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_phonet *fp = func_to_pn(f);
- int i;
-
- /* We are already disconnected */
- if (fp->in_req)
- usb_ep_free_request(fp->in_ep, fp->in_req);
- for (i = 0; i < phonet_rxq_size; i++)
- if (fp->out_reqv[i])
- usb_ep_free_request(fp->out_ep, fp->out_reqv[i]);
-
- usb_free_all_descriptors(f);
-}
-
-static struct usb_function *phonet_alloc(struct usb_function_instance *fi)
-{
- struct f_phonet *fp;
- struct f_phonet_opts *opts;
- int size;
-
- size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *));
- fp = kzalloc(size, GFP_KERNEL);
- if (!fp)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_phonet_opts, func_inst);
-
- fp->dev = opts->net;
- fp->function.name = "phonet";
- fp->function.bind = pn_bind;
- fp->function.unbind = pn_unbind;
- fp->function.set_alt = pn_set_alt;
- fp->function.get_alt = pn_get_alt;
- fp->function.disable = pn_disconnect;
- fp->function.free_func = phonet_free;
- spin_lock_init(&fp->rx.lock);
-
- return &fp->function;
-}
-
-struct net_device *gphonet_setup_default(void)
-{
- struct net_device *dev;
- struct phonet_port *port;
-
- /* Create net device */
- dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup);
- if (!dev)
- return ERR_PTR(-ENOMEM);
-
- port = netdev_priv(dev);
- spin_lock_init(&port->lock);
- netif_carrier_off(dev);
-
- return dev;
-}
-
-void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g)
-{
- SET_NETDEV_DEV(net, &g->dev);
-}
-
-int gphonet_register_netdev(struct net_device *net)
-{
- int status;
-
- status = register_netdev(net);
- if (status)
- free_netdev(net);
-
- return status;
-}
-
-void gphonet_cleanup(struct net_device *dev)
-{
- unregister_netdev(dev);
-}
-
-DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc);
-MODULE_AUTHOR("Rémi Denis-Courmont");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * f_rndis.c -- RNDIS link function driver
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
- * Copyright (C) 2008 Nokia Corporation
- * Copyright (C) 2009 Samsung Electronics
- * Author: Michal Nazarewicz (mina86@mina86.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/etherdevice.h>
-
-#include <linux/atomic.h>
-
-#include "u_ether.h"
-#include "u_ether_configfs.h"
-#include "u_rndis.h"
-#include "rndis.h"
-#include "configfs.h"
-
-/*
- * This function is an RNDIS Ethernet port -- a Microsoft protocol that's
- * been promoted instead of the standard CDC Ethernet. The published RNDIS
- * spec is ambiguous, incomplete, and needlessly complex. Variants such as
- * ActiveSync have even worse status in terms of specification.
- *
- * In short: it's a protocol controlled by (and for) Microsoft, not for an
- * Open ecosystem or markets. Linux supports it *only* because Microsoft
- * doesn't support the CDC Ethernet standard.
- *
- * The RNDIS data transfer model is complex, with multiple Ethernet packets
- * per USB message, and out of band data. The control model is built around
- * what's essentially an "RNDIS RPC" protocol. It's all wrapped in a CDC ACM
- * (modem, not Ethernet) veneer, with those ACM descriptors being entirely
- * useless (they're ignored). RNDIS expects to be the only function in its
- * configuration, so it's no real help if you need composite devices; and
- * it expects to be the first configuration too.
- *
- * There is a single technical advantage of RNDIS over CDC Ethernet, if you
- * discount the fluff that its RPC can be made to deliver: it doesn't need
- * a NOP altsetting for the data interface. That lets it work on some of the
- * "so smart it's stupid" hardware which takes over configuration changes
- * from the software, and adds restrictions like "no altsettings".
- *
- * Unfortunately MSFT's RNDIS drivers are buggy. They hang or oops, and
- * have all sorts of contrary-to-specification oddities that can prevent
- * them from working sanely. Since bugfixes (or accurate specs, letting
- * Linux work around those bugs) are unlikely to ever come from MSFT, you
- * may want to avoid using RNDIS on purely operational grounds.
- *
- * Omissions from the RNDIS 1.0 specification include:
- *
- * - Power management ... references data that's scattered around lots
- * of other documentation, which is incorrect/incomplete there too.
- *
- * - There are various undocumented protocol requirements, like the need
- * to send garbage in some control-OUT messages.
- *
- * - MS-Windows drivers sometimes emit undocumented requests.
- */
-
-struct f_rndis {
- struct gether port;
- u8 ctrl_id, data_id;
- u8 ethaddr[ETH_ALEN];
- u32 vendorID;
- const char *manufacturer;
- int config;
-
- struct usb_ep *notify;
- struct usb_request *notify_req;
- atomic_t notify_count;
-};
-
-static inline struct f_rndis *func_to_rndis(struct usb_function *f)
-{
- return container_of(f, struct f_rndis, port.func);
-}
-
-/* peak (theoretical) bulk transfer rate in bits-per-second */
-static unsigned int bitrate(struct usb_gadget *g)
-{
- if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
- return 13 * 1024 * 8 * 1000 * 8;
- else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
- return 13 * 512 * 8 * 1000 * 8;
- else
- return 19 * 64 * 1 * 1000 * 8;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- */
-
-#define RNDIS_STATUS_INTERVAL_MS 32
-#define STATUS_BYTECOUNT 8 /* 8 bytes data */
-
-
-/* interface descriptor: */
-
-static struct usb_interface_descriptor rndis_control_intf = {
- .bLength = sizeof rndis_control_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- /* status endpoint is optional; this could be patched later */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
- .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc header_desc = {
- .bLength = sizeof header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
-
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
- .bLength = sizeof call_mgmt_descriptor,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
-
- .bmCapabilities = 0x00,
- .bDataInterface = 0x01,
-};
-
-static struct usb_cdc_acm_descriptor rndis_acm_descriptor = {
- .bLength = sizeof rndis_acm_descriptor,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ACM_TYPE,
-
- .bmCapabilities = 0x00,
-};
-
-static struct usb_cdc_union_desc rndis_union_desc = {
- .bLength = sizeof(rndis_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- /* .bMasterInterface0 = DYNAMIC */
- /* .bSlaveInterface0 = DYNAMIC */
-};
-
-/* the data interface has two bulk endpoints */
-
-static struct usb_interface_descriptor rndis_data_intf = {
- .bLength = sizeof rndis_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-
-static struct usb_interface_assoc_descriptor
-rndis_iad_descriptor = {
- .bLength = sizeof rndis_iad_descriptor,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- .bFirstInterface = 0, /* XXX, hardcoded */
- .bInterfaceCount = 2, // control + data
- .bFunctionClass = USB_CLASS_COMM,
- .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
- .bFunctionProtocol = USB_CDC_PROTO_NONE,
- /* .iFunction = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = RNDIS_STATUS_INTERVAL_MS,
-};
-
-static struct usb_endpoint_descriptor fs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *eth_fs_function[] = {
- (struct usb_descriptor_header *) &rndis_iad_descriptor,
-
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &rndis_acm_descriptor,
- (struct usb_descriptor_header *) &rndis_union_desc,
- (struct usb_descriptor_header *) &fs_notify_desc,
-
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &fs_in_desc,
- (struct usb_descriptor_header *) &fs_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS)
-};
-
-static struct usb_endpoint_descriptor hs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *eth_hs_function[] = {
- (struct usb_descriptor_header *) &rndis_iad_descriptor,
-
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &rndis_acm_descriptor,
- (struct usb_descriptor_header *) &rndis_union_desc,
- (struct usb_descriptor_header *) &hs_notify_desc,
-
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &hs_in_desc,
- (struct usb_descriptor_header *) &hs_out_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS)
-};
-
-static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = {
- .bLength = sizeof ss_intr_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 3 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
- .wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT),
-};
-
-static struct usb_endpoint_descriptor ss_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor ss_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_bulk_comp_desc = {
- .bLength = sizeof ss_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 2 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
-};
-
-static struct usb_descriptor_header *eth_ss_function[] = {
- (struct usb_descriptor_header *) &rndis_iad_descriptor,
-
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &rndis_acm_descriptor,
- (struct usb_descriptor_header *) &rndis_union_desc,
- (struct usb_descriptor_header *) &ss_notify_desc,
- (struct usb_descriptor_header *) &ss_intr_comp_desc,
-
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &ss_in_desc,
- (struct usb_descriptor_header *) &ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &ss_out_desc,
- (struct usb_descriptor_header *) &ss_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-static struct usb_string rndis_string_defs[] = {
- [0].s = "RNDIS Communications Control",
- [1].s = "RNDIS Ethernet Data",
- [2].s = "RNDIS",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings rndis_string_table = {
- .language = 0x0409, /* en-us */
- .strings = rndis_string_defs,
-};
-
-static struct usb_gadget_strings *rndis_strings[] = {
- &rndis_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static struct sk_buff *rndis_add_header(struct gether *port,
- struct sk_buff *skb)
-{
- struct sk_buff *skb2;
-
- skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
- if (skb2)
- rndis_add_hdr(skb2);
-
- dev_kfree_skb(skb);
- return skb2;
-}
-
-static void rndis_response_available(void *_rndis)
-{
- struct f_rndis *rndis = _rndis;
- struct usb_request *req = rndis->notify_req;
- struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
- __le32 *data = req->buf;
- int status;
-
- if (atomic_inc_return(&rndis->notify_count) != 1)
- return;
-
- /* Send RNDIS RESPONSE_AVAILABLE notification; a
- * USB_CDC_NOTIFY_RESPONSE_AVAILABLE "should" work too
- *
- * This is the only notification defined by RNDIS.
- */
- data[0] = cpu_to_le32(1);
- data[1] = cpu_to_le32(0);
-
- status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
- if (status) {
- atomic_dec(&rndis->notify_count);
- DBG(cdev, "notify/0 --> %d\n", status);
- }
-}
-
-static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_rndis *rndis = req->context;
- struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
- int status = req->status;
-
- /* after TX:
- * - USB_CDC_GET_ENCAPSULATED_RESPONSE (ep0/control)
- * - RNDIS_RESPONSE_AVAILABLE (status/irq)
- */
- switch (status) {
- case -ECONNRESET:
- case -ESHUTDOWN:
- /* connection gone */
- atomic_set(&rndis->notify_count, 0);
- break;
- default:
- DBG(cdev, "RNDIS %s response error %d, %d/%d\n",
- ep->name, status,
- req->actual, req->length);
- /* FALLTHROUGH */
- case 0:
- if (ep != rndis->notify)
- break;
-
- /* handle multiple pending RNDIS_RESPONSE_AVAILABLE
- * notifications by resending until we're done
- */
- if (atomic_dec_and_test(&rndis->notify_count))
- break;
- status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
- if (status) {
- atomic_dec(&rndis->notify_count);
- DBG(cdev, "notify/1 --> %d\n", status);
- }
- break;
- }
-}
-
-static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_rndis *rndis = req->context;
- int status;
-
- /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
-// spin_lock(&dev->lock);
- status = rndis_msg_parser(rndis->config, (u8 *) req->buf);
- if (status < 0)
- pr_err("RNDIS command error %d, %d/%d\n",
- status, req->actual, req->length);
-// spin_unlock(&dev->lock);
-}
-
-static int
-rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /* composite driver infrastructure handles everything except
- * CDC class messages; interface activation uses set_alt().
- */
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
-
- /* RNDIS uses the CDC command encapsulation mechanism to implement
- * an RPC scheme, with much getting/setting of attributes by OID.
- */
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SEND_ENCAPSULATED_COMMAND:
- if (w_value || w_index != rndis->ctrl_id)
- goto invalid;
- /* read the request; process it later */
- value = w_length;
- req->complete = rndis_command_complete;
- req->context = rndis;
- /* later, rndis_response_available() sends a notification */
- break;
-
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_GET_ENCAPSULATED_RESPONSE:
- if (w_value || w_index != rndis->ctrl_id)
- goto invalid;
- else {
- u8 *buf;
- u32 n;
-
- /* return the result */
- buf = rndis_get_next_response(rndis->config, &n);
- if (buf) {
- memcpy(req->buf, buf, n);
- req->complete = rndis_response_complete;
- req->context = rndis;
- rndis_free_response(rndis->config, buf);
- value = n;
- }
- /* else stalls ... spec says to avoid that */
- }
- break;
-
- default:
-invalid:
- VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = (value < w_length);
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "rndis response on err %d\n", value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-
-static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* we know alt == 0 */
-
- if (intf == rndis->ctrl_id) {
- if (rndis->notify->driver_data) {
- VDBG(cdev, "reset rndis control %d\n", intf);
- usb_ep_disable(rndis->notify);
- }
- if (!rndis->notify->desc) {
- VDBG(cdev, "init rndis ctrl %d\n", intf);
- if (config_ep_by_speed(cdev->gadget, f, rndis->notify))
- goto fail;
- }
- usb_ep_enable(rndis->notify);
- rndis->notify->driver_data = rndis;
-
- } else if (intf == rndis->data_id) {
- struct net_device *net;
-
- if (rndis->port.in_ep->driver_data) {
- DBG(cdev, "reset rndis\n");
- gether_disconnect(&rndis->port);
- }
-
- if (!rndis->port.in_ep->desc || !rndis->port.out_ep->desc) {
- DBG(cdev, "init rndis\n");
- if (config_ep_by_speed(cdev->gadget, f,
- rndis->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f,
- rndis->port.out_ep)) {
- rndis->port.in_ep->desc = NULL;
- rndis->port.out_ep->desc = NULL;
- goto fail;
- }
- }
-
- /* Avoid ZLPs; they can be troublesome. */
- rndis->port.is_zlp_ok = false;
-
- /* RNDIS should be in the "RNDIS uninitialized" state,
- * either never activated or after rndis_uninit().
- *
- * We don't want data to flow here until a nonzero packet
- * filter is set, at which point it enters "RNDIS data
- * initialized" state ... but we do want the endpoints
- * to be activated. It's a strange little state.
- *
- * REVISIT the RNDIS gadget code has done this wrong for a
- * very long time. We need another call to the link layer
- * code -- gether_updown(...bool) maybe -- to do it right.
- */
- rndis->port.cdc_filter = 0;
-
- DBG(cdev, "RNDIS RX/TX early activation ... \n");
- net = gether_connect(&rndis->port);
- if (IS_ERR(net))
- return PTR_ERR(net);
-
- rndis_set_param_dev(rndis->config, net,
- &rndis->port.cdc_filter);
- } else
- goto fail;
-
- return 0;
-fail:
- return -EINVAL;
-}
-
-static void rndis_disable(struct usb_function *f)
-{
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- if (!rndis->notify->driver_data)
- return;
-
- DBG(cdev, "rndis deactivated\n");
-
- rndis_uninit(rndis->config);
- gether_disconnect(&rndis->port);
-
- usb_ep_disable(rndis->notify);
- rndis->notify->driver_data = NULL;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * This isn't quite the same mechanism as CDC Ethernet, since the
- * notification scheme passes less data, but the same set of link
- * states must be tested. A key difference is that altsettings are
- * not used to tell whether the link should send packets or not.
- */
-
-static void rndis_open(struct gether *geth)
-{
- struct f_rndis *rndis = func_to_rndis(&geth->func);
- struct usb_composite_dev *cdev = geth->func.config->cdev;
-
- DBG(cdev, "%s\n", __func__);
-
- rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3,
- bitrate(cdev->gadget) / 100);
- rndis_signal_connect(rndis->config);
-}
-
-static void rndis_close(struct gether *geth)
-{
- struct f_rndis *rndis = func_to_rndis(&geth->func);
-
- DBG(geth->func.config->cdev, "%s\n", __func__);
-
- rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
- rndis_signal_disconnect(rndis->config);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* Some controllers can't support RNDIS ... */
-static inline bool can_support_rndis(struct usb_configuration *c)
-{
- /* everything else is *presumably* fine */
- return true;
-}
-
-/* ethernet function driver setup/binding */
-
-static int
-rndis_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
-
- struct f_rndis_opts *rndis_opts;
-
- if (!can_support_rndis(c))
- return -EINVAL;
-
- rndis_opts = container_of(f->fi, struct f_rndis_opts, func_inst);
-
- if (cdev->use_os_string) {
- f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
- GFP_KERNEL);
- if (!f->os_desc_table)
- return PTR_ERR(f->os_desc_table);
- f->os_desc_n = 1;
- f->os_desc_table[0].os_desc = &rndis_opts->rndis_os_desc;
- }
-
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to rndis_opts->bound access
- */
- if (!rndis_opts->bound) {
- gether_set_gadget(rndis_opts->net, cdev->gadget);
- status = gether_register_netdev(rndis_opts->net);
- if (status)
- goto fail;
- rndis_opts->bound = true;
- }
-
- us = usb_gstrings_attach(cdev, rndis_strings,
- ARRAY_SIZE(rndis_string_defs));
- if (IS_ERR(us)) {
- status = PTR_ERR(us);
- goto fail;
- }
- rndis_control_intf.iInterface = us[0].id;
- rndis_data_intf.iInterface = us[1].id;
- rndis_iad_descriptor.iFunction = us[2].id;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- rndis->ctrl_id = status;
- rndis_iad_descriptor.bFirstInterface = status;
-
- rndis_control_intf.bInterfaceNumber = status;
- rndis_union_desc.bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- rndis->data_id = status;
-
- rndis_data_intf.bInterfaceNumber = status;
- rndis_union_desc.bSlaveInterface0 = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_in_desc);
- if (!ep)
- goto fail;
- rndis->port.in_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_out_desc);
- if (!ep)
- goto fail;
- rndis->port.out_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- /* NOTE: a status/notification endpoint is, strictly speaking,
- * optional. We don't treat it that way though! It's simpler,
- * and some newer profiles don't treat it as optional.
- */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_notify_desc);
- if (!ep)
- goto fail;
- rndis->notify = ep;
- ep->driver_data = cdev; /* claim */
-
- status = -ENOMEM;
-
- /* allocate notification request and buffer */
- rndis->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
- if (!rndis->notify_req)
- goto fail;
- rndis->notify_req->buf = kmalloc(STATUS_BYTECOUNT, GFP_KERNEL);
- if (!rndis->notify_req->buf)
- goto fail;
- rndis->notify_req->length = STATUS_BYTECOUNT;
- rndis->notify_req->context = rndis;
- rndis->notify_req->complete = rndis_response_complete;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- hs_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress;
- hs_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress;
- hs_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress;
-
- ss_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress;
- ss_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress;
- ss_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, eth_fs_function, eth_hs_function,
- eth_ss_function);
- if (status)
- goto fail;
-
- rndis->port.open = rndis_open;
- rndis->port.close = rndis_close;
-
- rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
- rndis_set_host_mac(rndis->config, rndis->ethaddr);
-
- if (rndis->manufacturer && rndis->vendorID &&
- rndis_set_param_vendor(rndis->config, rndis->vendorID,
- rndis->manufacturer))
- goto fail;
-
- /* NOTE: all that is done without knowing or caring about
- * the network link ... which is unavailable to this code
- * until we're activated via set_alt().
- */
-
- DBG(cdev, "RNDIS: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- rndis->port.in_ep->name, rndis->port.out_ep->name,
- rndis->notify->name);
- return 0;
-
-fail:
- kfree(f->os_desc_table);
- f->os_desc_n = 0;
- usb_free_all_descriptors(f);
-
- if (rndis->notify_req) {
- kfree(rndis->notify_req->buf);
- usb_ep_free_request(rndis->notify, rndis->notify_req);
- }
-
- /* we might as well release our claims on endpoints */
- if (rndis->notify)
- rndis->notify->driver_data = NULL;
- if (rndis->port.out_ep)
- rndis->port.out_ep->driver_data = NULL;
- if (rndis->port.in_ep)
- rndis->port.in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net)
-{
- struct f_rndis_opts *opts;
-
- opts = container_of(f, struct f_rndis_opts, func_inst);
- if (opts->bound)
- gether_cleanup(netdev_priv(opts->net));
- else
- free_netdev(opts->net);
- opts->borrowed_net = opts->bound = true;
- opts->net = net;
-}
-EXPORT_SYMBOL_GPL(rndis_borrow_net);
-
-static inline struct f_rndis_opts *to_f_rndis_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_rndis_opts,
- func_inst.group);
-}
-
-/* f_rndis_item_ops */
-USB_ETHERNET_CONFIGFS_ITEM(rndis);
-
-/* f_rndis_opts_dev_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(rndis);
-
-/* f_rndis_opts_host_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(rndis);
-
-/* f_rndis_opts_qmult */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(rndis);
-
-/* f_rndis_opts_ifname */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(rndis);
-
-static struct configfs_attribute *rndis_attrs[] = {
- &f_rndis_opts_dev_addr.attr,
- &f_rndis_opts_host_addr.attr,
- &f_rndis_opts_qmult.attr,
- &f_rndis_opts_ifname.attr,
- NULL,
-};
-
-static struct config_item_type rndis_func_type = {
- .ct_item_ops = &rndis_item_ops,
- .ct_attrs = rndis_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void rndis_free_inst(struct usb_function_instance *f)
-{
- struct f_rndis_opts *opts;
-
- opts = container_of(f, struct f_rndis_opts, func_inst);
- if (!opts->borrowed_net) {
- if (opts->bound)
- gether_cleanup(netdev_priv(opts->net));
- else
- free_netdev(opts->net);
- }
-
- kfree(opts->rndis_os_desc.group.default_groups); /* single VLA chunk */
- kfree(opts);
-}
-
-static struct usb_function_instance *rndis_alloc_inst(void)
-{
- struct f_rndis_opts *opts;
- struct usb_os_desc *descs[1];
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- opts->rndis_os_desc.ext_compat_id = opts->rndis_ext_compat_id;
-
- mutex_init(&opts->lock);
- opts->func_inst.free_func_inst = rndis_free_inst;
- opts->net = gether_setup_default();
- if (IS_ERR(opts->net)) {
- struct net_device *net = opts->net;
- kfree(opts);
- return ERR_CAST(net);
- }
- INIT_LIST_HEAD(&opts->rndis_os_desc.ext_prop);
-
- descs[0] = &opts->rndis_os_desc;
- usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
- THIS_MODULE);
- config_group_init_type_name(&opts->func_inst.group, "",
- &rndis_func_type);
-
- return &opts->func_inst;
-}
-
-static void rndis_free(struct usb_function *f)
-{
- struct f_rndis *rndis;
- struct f_rndis_opts *opts;
-
- rndis = func_to_rndis(f);
- rndis_deregister(rndis->config);
- opts = container_of(f->fi, struct f_rndis_opts, func_inst);
- kfree(rndis);
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-}
-
-static void rndis_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_rndis *rndis = func_to_rndis(f);
-
- kfree(f->os_desc_table);
- f->os_desc_n = 0;
- usb_free_all_descriptors(f);
-
- kfree(rndis->notify_req->buf);
- usb_ep_free_request(rndis->notify, rndis->notify_req);
-}
-
-static struct usb_function *rndis_alloc(struct usb_function_instance *fi)
-{
- struct f_rndis *rndis;
- struct f_rndis_opts *opts;
- int status;
-
- /* allocate and initialize one new instance */
- rndis = kzalloc(sizeof(*rndis), GFP_KERNEL);
- if (!rndis)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_rndis_opts, func_inst);
- mutex_lock(&opts->lock);
- opts->refcnt++;
-
- gether_get_host_addr_u8(opts->net, rndis->ethaddr);
- rndis->vendorID = opts->vendor_id;
- rndis->manufacturer = opts->manufacturer;
-
- rndis->port.ioport = netdev_priv(opts->net);
- mutex_unlock(&opts->lock);
- /* RNDIS activates when the host changes this filter */
- rndis->port.cdc_filter = 0;
-
- /* RNDIS has special (and complex) framing */
- rndis->port.header_len = sizeof(struct rndis_packet_msg_type);
- rndis->port.wrap = rndis_add_header;
- rndis->port.unwrap = rndis_rm_hdr;
-
- rndis->port.func.name = "rndis";
- /* descriptors are per-instance copies */
- rndis->port.func.bind = rndis_bind;
- rndis->port.func.unbind = rndis_unbind;
- rndis->port.func.set_alt = rndis_set_alt;
- rndis->port.func.setup = rndis_setup;
- rndis->port.func.disable = rndis_disable;
- rndis->port.func.free_func = rndis_free;
-
- status = rndis_register(rndis_response_available, rndis);
- if (status < 0) {
- kfree(rndis);
- return ERR_PTR(status);
- }
- rndis->config = status;
-
- return &rndis->port.func;
-}
-
-DECLARE_USB_FUNCTION(rndis, rndis_alloc_inst, rndis_alloc);
-
-static int __init rndis_mod_init(void)
-{
- int ret;
-
- ret = rndis_init();
- if (ret)
- return ret;
-
- return usb_function_register(&rndisusb_func);
-}
-module_init(rndis_mod_init);
-
-static void __exit rndis_mod_exit(void)
-{
- usb_function_unregister(&rndisusb_func);
- rndis_exit();
-}
-module_exit(rndis_mod_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Brownell");
+++ /dev/null
-/*
- * f_serial.c - generic USB serial function driver
- *
- * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
- * Copyright (C) 2008 by David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-
-#include "u_serial.h"
-#include "gadget_chips.h"
-
-
-/*
- * This function packages a simple "generic serial" port with no real
- * control mechanisms, just raw data transfer over two bulk endpoints.
- *
- * Because it's not standardized, this isn't as interoperable as the
- * CDC ACM driver. However, for many purposes it's just as functional
- * if you can arrange appropriate host side drivers.
- */
-
-struct f_gser {
- struct gserial port;
- u8 data_id;
- u8 port_num;
-};
-
-static inline struct f_gser *func_to_gser(struct usb_function *f)
-{
- return container_of(f, struct f_gser, port.func);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* interface descriptor: */
-
-static struct usb_interface_descriptor gser_interface_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor gser_fs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor gser_fs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *gser_fs_function[] = {
- (struct usb_descriptor_header *) &gser_interface_desc,
- (struct usb_descriptor_header *) &gser_fs_in_desc,
- (struct usb_descriptor_header *) &gser_fs_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor gser_hs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor gser_hs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *gser_hs_function[] = {
- (struct usb_descriptor_header *) &gser_interface_desc,
- (struct usb_descriptor_header *) &gser_hs_in_desc,
- (struct usb_descriptor_header *) &gser_hs_out_desc,
- NULL,
-};
-
-static struct usb_endpoint_descriptor gser_ss_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor gser_ss_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor gser_ss_bulk_comp_desc = {
- .bLength = sizeof gser_ss_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-};
-
-static struct usb_descriptor_header *gser_ss_function[] = {
- (struct usb_descriptor_header *) &gser_interface_desc,
- (struct usb_descriptor_header *) &gser_ss_in_desc,
- (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &gser_ss_out_desc,
- (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-static struct usb_string gser_string_defs[] = {
- [0].s = "Generic Serial",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings gser_string_table = {
- .language = 0x0409, /* en-us */
- .strings = gser_string_defs,
-};
-
-static struct usb_gadget_strings *gser_strings[] = {
- &gser_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int gser_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_gser *gser = func_to_gser(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* we know alt == 0, so this is an activation or a reset */
-
- if (gser->port.in->driver_data) {
- DBG(cdev, "reset generic ttyGS%d\n", gser->port_num);
- gserial_disconnect(&gser->port);
- }
- if (!gser->port.in->desc || !gser->port.out->desc) {
- DBG(cdev, "activate generic ttyGS%d\n", gser->port_num);
- if (config_ep_by_speed(cdev->gadget, f, gser->port.in) ||
- config_ep_by_speed(cdev->gadget, f, gser->port.out)) {
- gser->port.in->desc = NULL;
- gser->port.out->desc = NULL;
- return -EINVAL;
- }
- }
- gserial_connect(&gser->port, gser->port_num);
- return 0;
-}
-
-static void gser_disable(struct usb_function *f)
-{
- struct f_gser *gser = func_to_gser(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "generic ttyGS%d deactivated\n", gser->port_num);
- gserial_disconnect(&gser->port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* serial function driver setup/binding */
-
-static int gser_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_gser *gser = func_to_gser(f);
- int status;
- struct usb_ep *ep;
-
- /* REVISIT might want instance-specific strings to help
- * distinguish instances ...
- */
-
- /* maybe allocate device-global string ID */
- if (gser_string_defs[0].id == 0) {
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- gser_string_defs[0].id = status;
- }
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- gser->data_id = status;
- gser_interface_desc.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &gser_fs_in_desc);
- if (!ep)
- goto fail;
- gser->port.in = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &gser_fs_out_desc);
- if (!ep)
- goto fail;
- gser->port.out = ep;
- ep->driver_data = cdev; /* claim */
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- gser_hs_in_desc.bEndpointAddress = gser_fs_in_desc.bEndpointAddress;
- gser_hs_out_desc.bEndpointAddress = gser_fs_out_desc.bEndpointAddress;
-
- gser_ss_in_desc.bEndpointAddress = gser_fs_in_desc.bEndpointAddress;
- gser_ss_out_desc.bEndpointAddress = gser_fs_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, gser_fs_function, gser_hs_function,
- gser_ss_function);
- if (status)
- goto fail;
- DBG(cdev, "generic ttyGS%d: %s speed IN/%s OUT/%s\n",
- gser->port_num,
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- gser->port.in->name, gser->port.out->name);
- return 0;
-
-fail:
- /* we might as well release our claims on endpoints */
- if (gser->port.out)
- gser->port.out->driver_data = NULL;
- if (gser->port.in)
- gser->port.in->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_serial_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_serial_opts);
-static ssize_t f_serial_attr_show(struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
-{
- struct f_serial_opts *opts = to_f_serial_opts(item);
- struct f_serial_opts_attribute *f_serial_opts_attr =
- container_of(attr, struct f_serial_opts_attribute, attr);
- ssize_t ret = 0;
-
- if (f_serial_opts_attr->show)
- ret = f_serial_opts_attr->show(opts, page);
-
- return ret;
-}
-
-static void serial_attr_release(struct config_item *item)
-{
- struct f_serial_opts *opts = to_f_serial_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations serial_item_ops = {
- .release = serial_attr_release,
- .show_attribute = f_serial_attr_show,
-};
-
-static ssize_t f_serial_port_num_show(struct f_serial_opts *opts, char *page)
-{
- return sprintf(page, "%u\n", opts->port_num);
-}
-
-static struct f_serial_opts_attribute f_serial_port_num =
- __CONFIGFS_ATTR_RO(port_num, f_serial_port_num_show);
-
-static struct configfs_attribute *acm_attrs[] = {
- &f_serial_port_num.attr,
- NULL,
-};
-
-static struct config_item_type serial_func_type = {
- .ct_item_ops = &serial_item_ops,
- .ct_attrs = acm_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void gser_free_inst(struct usb_function_instance *f)
-{
- struct f_serial_opts *opts;
-
- opts = container_of(f, struct f_serial_opts, func_inst);
- gserial_free_line(opts->port_num);
- kfree(opts);
-}
-
-static struct usb_function_instance *gser_alloc_inst(void)
-{
- struct f_serial_opts *opts;
- int ret;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
-
- opts->func_inst.free_func_inst = gser_free_inst;
- ret = gserial_alloc_line(&opts->port_num);
- if (ret) {
- kfree(opts);
- return ERR_PTR(ret);
- }
- config_group_init_type_name(&opts->func_inst.group, "",
- &serial_func_type);
-
- return &opts->func_inst;
-}
-
-static void gser_free(struct usb_function *f)
-{
- struct f_gser *serial;
-
- serial = func_to_gser(f);
- kfree(serial);
-}
-
-static void gser_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- usb_free_all_descriptors(f);
-}
-
-static struct usb_function *gser_alloc(struct usb_function_instance *fi)
-{
- struct f_gser *gser;
- struct f_serial_opts *opts;
-
- /* allocate and initialize one new instance */
- gser = kzalloc(sizeof(*gser), GFP_KERNEL);
- if (!gser)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_serial_opts, func_inst);
-
- gser->port_num = opts->port_num;
-
- gser->port.func.name = "gser";
- gser->port.func.strings = gser_strings;
- gser->port.func.bind = gser_bind;
- gser->port.func.unbind = gser_unbind;
- gser->port.func.set_alt = gser_set_alt;
- gser->port.func.disable = gser_disable;
- gser->port.func.free_func = gser_free;
-
- return &gser->port.func;
-}
-
-DECLARE_USB_FUNCTION_INIT(gser, gser_alloc_inst, gser_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Al Borchers");
-MODULE_AUTHOR("David Brownell");
+++ /dev/null
-/*
- * f_sourcesink.c - USB peripheral source/sink configuration driver
- *
- * Copyright (C) 2003-2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/usb/composite.h>
-#include <linux/err.h>
-
-#include "g_zero.h"
-#include "gadget_chips.h"
-#include "u_f.h"
-
-/*
- * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
- * controller drivers.
- *
- * This just sinks bulk packets OUT to the peripheral and sources them IN
- * to the host, optionally with specific data patterns for integrity tests.
- * As such it supports basic functionality and load tests.
- *
- * In terms of control messaging, this supports all the standard requests
- * plus two that support control-OUT tests. If the optional "autoresume"
- * mode is enabled, it provides good functional coverage for the "USBCV"
- * test harness from USB-IF.
- *
- * Note that because this doesn't queue more than one request at a time,
- * some other function must be used to test queueing logic. The network
- * link (g_ether) is the best overall option for that, since its TX and RX
- * queues are relatively independent, will receive a range of packet sizes,
- * and can often be made to run out completely. Those issues are important
- * when stress testing peripheral controller drivers.
- *
- *
- * This is currently packaged as a configuration driver, which can't be
- * combined with other functions to make composite devices. However, it
- * can be combined with other independent configurations.
- */
-struct f_sourcesink {
- struct usb_function function;
-
- struct usb_ep *in_ep;
- struct usb_ep *out_ep;
- struct usb_ep *iso_in_ep;
- struct usb_ep *iso_out_ep;
- int cur_alt;
-};
-
-static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
-{
- return container_of(f, struct f_sourcesink, function);
-}
-
-static unsigned pattern;
-static unsigned isoc_interval;
-static unsigned isoc_maxpacket;
-static unsigned isoc_mult;
-static unsigned isoc_maxburst;
-static unsigned buflen;
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_interface_descriptor source_sink_intf_alt0 = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 0,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_interface_descriptor source_sink_intf_alt1 = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 1,
- .bNumEndpoints = 4,
- .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
- /* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_iso_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1023),
- .bInterval = 4,
-};
-
-static struct usb_endpoint_descriptor fs_iso_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1023),
- .bInterval = 4,
-};
-
-static struct usb_descriptor_header *fs_source_sink_descs[] = {
- (struct usb_descriptor_header *) &source_sink_intf_alt0,
- (struct usb_descriptor_header *) &fs_sink_desc,
- (struct usb_descriptor_header *) &fs_source_desc,
- (struct usb_descriptor_header *) &source_sink_intf_alt1,
-#define FS_ALT_IFC_1_OFFSET 3
- (struct usb_descriptor_header *) &fs_sink_desc,
- (struct usb_descriptor_header *) &fs_source_desc,
- (struct usb_descriptor_header *) &fs_iso_sink_desc,
- (struct usb_descriptor_header *) &fs_iso_source_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_iso_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1024),
- .bInterval = 4,
-};
-
-static struct usb_endpoint_descriptor hs_iso_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1024),
- .bInterval = 4,
-};
-
-static struct usb_descriptor_header *hs_source_sink_descs[] = {
- (struct usb_descriptor_header *) &source_sink_intf_alt0,
- (struct usb_descriptor_header *) &hs_source_desc,
- (struct usb_descriptor_header *) &hs_sink_desc,
- (struct usb_descriptor_header *) &source_sink_intf_alt1,
-#define HS_ALT_IFC_1_OFFSET 3
- (struct usb_descriptor_header *) &hs_source_desc,
- (struct usb_descriptor_header *) &hs_sink_desc,
- (struct usb_descriptor_header *) &hs_iso_source_desc,
- (struct usb_descriptor_header *) &hs_iso_sink_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
- .bLength = USB_DT_SS_EP_COMP_SIZE,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = 0,
-};
-
-static struct usb_endpoint_descriptor ss_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
- .bLength = USB_DT_SS_EP_COMP_SIZE,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = 0,
-};
-
-static struct usb_endpoint_descriptor ss_iso_source_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1024),
- .bInterval = 4,
-};
-
-static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
- .bLength = USB_DT_SS_EP_COMP_SIZE,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor ss_iso_sink_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1024),
- .bInterval = 4,
-};
-
-static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
- .bLength = USB_DT_SS_EP_COMP_SIZE,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = cpu_to_le16(1024),
-};
-
-static struct usb_descriptor_header *ss_source_sink_descs[] = {
- (struct usb_descriptor_header *) &source_sink_intf_alt0,
- (struct usb_descriptor_header *) &ss_source_desc,
- (struct usb_descriptor_header *) &ss_source_comp_desc,
- (struct usb_descriptor_header *) &ss_sink_desc,
- (struct usb_descriptor_header *) &ss_sink_comp_desc,
- (struct usb_descriptor_header *) &source_sink_intf_alt1,
-#define SS_ALT_IFC_1_OFFSET 5
- (struct usb_descriptor_header *) &ss_source_desc,
- (struct usb_descriptor_header *) &ss_source_comp_desc,
- (struct usb_descriptor_header *) &ss_sink_desc,
- (struct usb_descriptor_header *) &ss_sink_comp_desc,
- (struct usb_descriptor_header *) &ss_iso_source_desc,
- (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
- (struct usb_descriptor_header *) &ss_iso_sink_desc,
- (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
- NULL,
-};
-
-/* function-specific strings: */
-
-static struct usb_string strings_sourcesink[] = {
- [0].s = "source and sink data",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings stringtab_sourcesink = {
- .language = 0x0409, /* en-us */
- .strings = strings_sourcesink,
-};
-
-static struct usb_gadget_strings *sourcesink_strings[] = {
- &stringtab_sourcesink,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
-{
- return alloc_ep_req(ep, len, buflen);
-}
-
-void free_ep_req(struct usb_ep *ep, struct usb_request *req)
-{
- kfree(req->buf);
- usb_ep_free_request(ep, req);
-}
-
-static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
-{
- int value;
-
- if (ep->driver_data) {
- value = usb_ep_disable(ep);
- if (value < 0)
- DBG(cdev, "disable %s --> %d\n",
- ep->name, value);
- ep->driver_data = NULL;
- }
-}
-
-void disable_endpoints(struct usb_composite_dev *cdev,
- struct usb_ep *in, struct usb_ep *out,
- struct usb_ep *iso_in, struct usb_ep *iso_out)
-{
- disable_ep(cdev, in);
- disable_ep(cdev, out);
- if (iso_in)
- disable_ep(cdev, iso_in);
- if (iso_out)
- disable_ep(cdev, iso_out);
-}
-
-static int
-sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_sourcesink *ss = func_to_ss(f);
- int id;
- int ret;
-
- /* allocate interface ID(s) */
- id = usb_interface_id(c, f);
- if (id < 0)
- return id;
- source_sink_intf_alt0.bInterfaceNumber = id;
- source_sink_intf_alt1.bInterfaceNumber = id;
-
- /* allocate bulk endpoints */
- ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
- if (!ss->in_ep) {
-autoconf_fail:
- ERROR(cdev, "%s: can't autoconfigure on %s\n",
- f->name, cdev->gadget->name);
- return -ENODEV;
- }
- ss->in_ep->driver_data = cdev; /* claim */
-
- ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
- if (!ss->out_ep)
- goto autoconf_fail;
- ss->out_ep->driver_data = cdev; /* claim */
-
- /* sanity check the isoc module parameters */
- if (isoc_interval < 1)
- isoc_interval = 1;
- if (isoc_interval > 16)
- isoc_interval = 16;
- if (isoc_mult > 2)
- isoc_mult = 2;
- if (isoc_maxburst > 15)
- isoc_maxburst = 15;
-
- /* fill in the FS isoc descriptors from the module parameters */
- fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
- 1023 : isoc_maxpacket;
- fs_iso_source_desc.bInterval = isoc_interval;
- fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
- 1023 : isoc_maxpacket;
- fs_iso_sink_desc.bInterval = isoc_interval;
-
- /* allocate iso endpoints */
- ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
- if (!ss->iso_in_ep)
- goto no_iso;
- ss->iso_in_ep->driver_data = cdev; /* claim */
-
- ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
- if (ss->iso_out_ep) {
- ss->iso_out_ep->driver_data = cdev; /* claim */
- } else {
- ss->iso_in_ep->driver_data = NULL;
- ss->iso_in_ep = NULL;
-no_iso:
- /*
- * We still want to work even if the UDC doesn't have isoc
- * endpoints, so null out the alt interface that contains
- * them and continue.
- */
- fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
- hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
- ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
- }
-
- if (isoc_maxpacket > 1024)
- isoc_maxpacket = 1024;
-
- /* support high speed hardware */
- hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
- hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
-
- /*
- * Fill in the HS isoc descriptors from the module parameters.
- * We assume that the user knows what they are doing and won't
- * give parameters that their UDC doesn't support.
- */
- hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
- hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
- hs_iso_source_desc.bInterval = isoc_interval;
- hs_iso_source_desc.bEndpointAddress =
- fs_iso_source_desc.bEndpointAddress;
-
- hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
- hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
- hs_iso_sink_desc.bInterval = isoc_interval;
- hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
-
- /* support super speed hardware */
- ss_source_desc.bEndpointAddress =
- fs_source_desc.bEndpointAddress;
- ss_sink_desc.bEndpointAddress =
- fs_sink_desc.bEndpointAddress;
-
- /*
- * Fill in the SS isoc descriptors from the module parameters.
- * We assume that the user knows what they are doing and won't
- * give parameters that their UDC doesn't support.
- */
- ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
- ss_iso_source_desc.bInterval = isoc_interval;
- ss_iso_source_comp_desc.bmAttributes = isoc_mult;
- ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
- ss_iso_source_comp_desc.wBytesPerInterval =
- isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
- ss_iso_source_desc.bEndpointAddress =
- fs_iso_source_desc.bEndpointAddress;
-
- ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
- ss_iso_sink_desc.bInterval = isoc_interval;
- ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
- ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
- ss_iso_sink_comp_desc.wBytesPerInterval =
- isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
- ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
-
- ret = usb_assign_descriptors(f, fs_source_sink_descs,
- hs_source_sink_descs, ss_source_sink_descs);
- if (ret)
- return ret;
-
- DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
- (gadget_is_superspeed(c->cdev->gadget) ? "super" :
- (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
- f->name, ss->in_ep->name, ss->out_ep->name,
- ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
- ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
- return 0;
-}
-
-static void
-sourcesink_free_func(struct usb_function *f)
-{
- struct f_ss_opts *opts;
-
- opts = container_of(f->fi, struct f_ss_opts, func_inst);
-
- mutex_lock(&opts->lock);
- opts->refcnt--;
- mutex_unlock(&opts->lock);
-
- usb_free_all_descriptors(f);
- kfree(func_to_ss(f));
-}
-
-/* optionally require specific source/sink data patterns */
-static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
-{
- unsigned i;
- u8 *buf = req->buf;
- struct usb_composite_dev *cdev = ss->function.config->cdev;
-
- if (pattern == 2)
- return 0;
-
- for (i = 0; i < req->actual; i++, buf++) {
- switch (pattern) {
-
- /* all-zeroes has no synchronization issues */
- case 0:
- if (*buf == 0)
- continue;
- break;
-
- /* "mod63" stays in sync with short-terminated transfers,
- * OR otherwise when host and gadget agree on how large
- * each usb transfer request should be. Resync is done
- * with set_interface or set_config. (We *WANT* it to
- * get quickly out of sync if controllers or their drivers
- * stutter for any reason, including buffer duplication...)
- */
- case 1:
- if (*buf == (u8)(i % 63))
- continue;
- break;
- }
- ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
- usb_ep_set_halt(ss->out_ep);
- return -EINVAL;
- }
- return 0;
-}
-
-static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
-{
- unsigned i;
- u8 *buf = req->buf;
-
- switch (pattern) {
- case 0:
- memset(req->buf, 0, req->length);
- break;
- case 1:
- for (i = 0; i < req->length; i++)
- *buf++ = (u8) (i % 63);
- break;
- case 2:
- break;
- }
-}
-
-static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct usb_composite_dev *cdev;
- struct f_sourcesink *ss = ep->driver_data;
- int status = req->status;
-
- /* driver_data will be null if ep has been disabled */
- if (!ss)
- return;
-
- cdev = ss->function.config->cdev;
-
- switch (status) {
-
- case 0: /* normal completion? */
- if (ep == ss->out_ep) {
- check_read_data(ss, req);
- if (pattern != 2)
- memset(req->buf, 0x55, req->length);
- }
- break;
-
- /* this endpoint is normally active while we're configured */
- case -ECONNABORTED: /* hardware forced ep reset */
- case -ECONNRESET: /* request dequeued */
- case -ESHUTDOWN: /* disconnect from host */
- VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
- req->actual, req->length);
- if (ep == ss->out_ep)
- check_read_data(ss, req);
- free_ep_req(ep, req);
- return;
-
- case -EOVERFLOW: /* buffer overrun on read means that
- * we didn't provide a big enough
- * buffer.
- */
- default:
-#if 1
- DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
- status, req->actual, req->length);
-#endif
- case -EREMOTEIO: /* short read */
- break;
- }
-
- status = usb_ep_queue(ep, req, GFP_ATOMIC);
- if (status) {
- ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
- ep->name, req->length, status);
- usb_ep_set_halt(ep);
- /* FIXME recover later ... somehow */
- }
-}
-
-static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
- bool is_iso, int speed)
-{
- struct usb_ep *ep;
- struct usb_request *req;
- int i, size, status;
-
- for (i = 0; i < 8; i++) {
- if (is_iso) {
- switch (speed) {
- case USB_SPEED_SUPER:
- size = isoc_maxpacket * (isoc_mult + 1) *
- (isoc_maxburst + 1);
- break;
- case USB_SPEED_HIGH:
- size = isoc_maxpacket * (isoc_mult + 1);
- break;
- default:
- size = isoc_maxpacket > 1023 ?
- 1023 : isoc_maxpacket;
- break;
- }
- ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
- req = ss_alloc_ep_req(ep, size);
- } else {
- ep = is_in ? ss->in_ep : ss->out_ep;
- req = ss_alloc_ep_req(ep, 0);
- }
-
- if (!req)
- return -ENOMEM;
-
- req->complete = source_sink_complete;
- if (is_in)
- reinit_write_data(ep, req);
- else if (pattern != 2)
- memset(req->buf, 0x55, req->length);
-
- status = usb_ep_queue(ep, req, GFP_ATOMIC);
- if (status) {
- struct usb_composite_dev *cdev;
-
- cdev = ss->function.config->cdev;
- ERROR(cdev, "start %s%s %s --> %d\n",
- is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
- ep->name, status);
- free_ep_req(ep, req);
- }
-
- if (!is_iso)
- break;
- }
-
- return status;
-}
-
-static void disable_source_sink(struct f_sourcesink *ss)
-{
- struct usb_composite_dev *cdev;
-
- cdev = ss->function.config->cdev;
- disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
- ss->iso_out_ep);
- VDBG(cdev, "%s disabled\n", ss->function.name);
-}
-
-static int
-enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
- int alt)
-{
- int result = 0;
- int speed = cdev->gadget->speed;
- struct usb_ep *ep;
-
- /* one bulk endpoint writes (sources) zeroes IN (to the host) */
- ep = ss->in_ep;
- result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
- if (result)
- return result;
- result = usb_ep_enable(ep);
- if (result < 0)
- return result;
- ep->driver_data = ss;
-
- result = source_sink_start_ep(ss, true, false, speed);
- if (result < 0) {
-fail:
- ep = ss->in_ep;
- usb_ep_disable(ep);
- ep->driver_data = NULL;
- return result;
- }
-
- /* one bulk endpoint reads (sinks) anything OUT (from the host) */
- ep = ss->out_ep;
- result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
- if (result)
- goto fail;
- result = usb_ep_enable(ep);
- if (result < 0)
- goto fail;
- ep->driver_data = ss;
-
- result = source_sink_start_ep(ss, false, false, speed);
- if (result < 0) {
-fail2:
- ep = ss->out_ep;
- usb_ep_disable(ep);
- ep->driver_data = NULL;
- goto fail;
- }
-
- if (alt == 0)
- goto out;
-
- /* one iso endpoint writes (sources) zeroes IN (to the host) */
- ep = ss->iso_in_ep;
- if (ep) {
- result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
- if (result)
- goto fail2;
- result = usb_ep_enable(ep);
- if (result < 0)
- goto fail2;
- ep->driver_data = ss;
-
- result = source_sink_start_ep(ss, true, true, speed);
- if (result < 0) {
-fail3:
- ep = ss->iso_in_ep;
- if (ep) {
- usb_ep_disable(ep);
- ep->driver_data = NULL;
- }
- goto fail2;
- }
- }
-
- /* one iso endpoint reads (sinks) anything OUT (from the host) */
- ep = ss->iso_out_ep;
- if (ep) {
- result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
- if (result)
- goto fail3;
- result = usb_ep_enable(ep);
- if (result < 0)
- goto fail3;
- ep->driver_data = ss;
-
- result = source_sink_start_ep(ss, false, true, speed);
- if (result < 0) {
- usb_ep_disable(ep);
- ep->driver_data = NULL;
- goto fail3;
- }
- }
-out:
- ss->cur_alt = alt;
-
- DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
- return result;
-}
-
-static int sourcesink_set_alt(struct usb_function *f,
- unsigned intf, unsigned alt)
-{
- struct f_sourcesink *ss = func_to_ss(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- if (ss->in_ep->driver_data)
- disable_source_sink(ss);
- return enable_source_sink(cdev, ss, alt);
-}
-
-static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
-{
- struct f_sourcesink *ss = func_to_ss(f);
-
- return ss->cur_alt;
-}
-
-static void sourcesink_disable(struct usb_function *f)
-{
- struct f_sourcesink *ss = func_to_ss(f);
-
- disable_source_sink(ss);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int sourcesink_setup(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct usb_configuration *c = f->config;
- struct usb_request *req = c->cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- req->length = USB_COMP_EP0_BUFSIZ;
-
- /* composite driver infrastructure handles everything except
- * the two control test requests.
- */
- switch (ctrl->bRequest) {
-
- /*
- * These are the same vendor-specific requests supported by
- * Intel's USB 2.0 compliance test devices. We exceed that
- * device spec by allowing multiple-packet requests.
- *
- * NOTE: the Control-OUT data stays in req->buf ... better
- * would be copying it into a scratch buffer, so that other
- * requests may safely intervene.
- */
- case 0x5b: /* control WRITE test -- fill the buffer */
- if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
- goto unknown;
- if (w_value || w_index)
- break;
- /* just read that many bytes into the buffer */
- if (w_length > req->length)
- break;
- value = w_length;
- break;
- case 0x5c: /* control READ test -- return the buffer */
- if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
- goto unknown;
- if (w_value || w_index)
- break;
- /* expect those bytes are still in the buffer; send back */
- if (w_length > req->length)
- break;
- value = w_length;
- break;
-
- default:
-unknown:
- VDBG(c->cdev,
- "unknown control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = 0;
- req->length = value;
- value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(c->cdev, "source/sink response, err %d\n",
- value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-static struct usb_function *source_sink_alloc_func(
- struct usb_function_instance *fi)
-{
- struct f_sourcesink *ss;
- struct f_ss_opts *ss_opts;
-
- ss = kzalloc(sizeof(*ss), GFP_KERNEL);
- if (!ss)
- return NULL;
-
- ss_opts = container_of(fi, struct f_ss_opts, func_inst);
-
- mutex_lock(&ss_opts->lock);
- ss_opts->refcnt++;
- mutex_unlock(&ss_opts->lock);
-
- pattern = ss_opts->pattern;
- isoc_interval = ss_opts->isoc_interval;
- isoc_maxpacket = ss_opts->isoc_maxpacket;
- isoc_mult = ss_opts->isoc_mult;
- isoc_maxburst = ss_opts->isoc_maxburst;
- buflen = ss_opts->bulk_buflen;
-
- ss->function.name = "source/sink";
- ss->function.bind = sourcesink_bind;
- ss->function.set_alt = sourcesink_set_alt;
- ss->function.get_alt = sourcesink_get_alt;
- ss->function.disable = sourcesink_disable;
- ss->function.setup = sourcesink_setup;
- ss->function.strings = sourcesink_strings;
-
- ss->function.free_func = sourcesink_free_func;
-
- return &ss->function;
-}
-
-static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_ss_opts,
- func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_ss_opts);
-CONFIGFS_ATTR_OPS(f_ss_opts);
-
-static void ss_attr_release(struct config_item *item)
-{
- struct f_ss_opts *ss_opts = to_f_ss_opts(item);
-
- usb_put_function_instance(&ss_opts->func_inst);
-}
-
-static struct configfs_item_operations ss_item_ops = {
- .release = ss_attr_release,
- .show_attribute = f_ss_opts_attr_show,
- .store_attribute = f_ss_opts_attr_store,
-};
-
-static ssize_t f_ss_opts_pattern_show(struct f_ss_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->pattern);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_ss_opts_pattern_store(struct f_ss_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u8 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou8(page, 0, &num);
- if (ret)
- goto end;
-
- if (num != 0 && num != 1 && num != 2) {
- ret = -EINVAL;
- goto end;
- }
-
- opts->pattern = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_pattern =
- __CONFIGFS_ATTR(pattern, S_IRUGO | S_IWUSR,
- f_ss_opts_pattern_show,
- f_ss_opts_pattern_store);
-
-static ssize_t f_ss_opts_isoc_interval_show(struct f_ss_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->isoc_interval);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_ss_opts_isoc_interval_store(struct f_ss_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u8 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou8(page, 0, &num);
- if (ret)
- goto end;
-
- if (num > 16) {
- ret = -EINVAL;
- goto end;
- }
-
- opts->isoc_interval = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_interval =
- __CONFIGFS_ATTR(isoc_interval, S_IRUGO | S_IWUSR,
- f_ss_opts_isoc_interval_show,
- f_ss_opts_isoc_interval_store);
-
-static ssize_t f_ss_opts_isoc_maxpacket_show(struct f_ss_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->isoc_maxpacket);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_ss_opts_isoc_maxpacket_store(struct f_ss_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u16 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou16(page, 0, &num);
- if (ret)
- goto end;
-
- if (num > 1024) {
- ret = -EINVAL;
- goto end;
- }
-
- opts->isoc_maxpacket = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_maxpacket =
- __CONFIGFS_ATTR(isoc_maxpacket, S_IRUGO | S_IWUSR,
- f_ss_opts_isoc_maxpacket_show,
- f_ss_opts_isoc_maxpacket_store);
-
-static ssize_t f_ss_opts_isoc_mult_show(struct f_ss_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->isoc_mult);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_ss_opts_isoc_mult_store(struct f_ss_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u8 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou8(page, 0, &num);
- if (ret)
- goto end;
-
- if (num > 2) {
- ret = -EINVAL;
- goto end;
- }
-
- opts->isoc_mult = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_mult =
- __CONFIGFS_ATTR(isoc_mult, S_IRUGO | S_IWUSR,
- f_ss_opts_isoc_mult_show,
- f_ss_opts_isoc_mult_store);
-
-static ssize_t f_ss_opts_isoc_maxburst_show(struct f_ss_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->isoc_maxburst);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_ss_opts_isoc_maxburst_store(struct f_ss_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u8 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou8(page, 0, &num);
- if (ret)
- goto end;
-
- if (num > 15) {
- ret = -EINVAL;
- goto end;
- }
-
- opts->isoc_maxburst = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_maxburst =
- __CONFIGFS_ATTR(isoc_maxburst, S_IRUGO | S_IWUSR,
- f_ss_opts_isoc_maxburst_show,
- f_ss_opts_isoc_maxburst_store);
-
-static ssize_t f_ss_opts_bulk_buflen_show(struct f_ss_opts *opts, char *page)
-{
- int result;
-
- mutex_lock(&opts->lock);
- result = sprintf(page, "%d", opts->bulk_buflen);
- mutex_unlock(&opts->lock);
-
- return result;
-}
-
-static ssize_t f_ss_opts_bulk_buflen_store(struct f_ss_opts *opts,
- const char *page, size_t len)
-{
- int ret;
- u32 num;
-
- mutex_lock(&opts->lock);
- if (opts->refcnt) {
- ret = -EBUSY;
- goto end;
- }
-
- ret = kstrtou32(page, 0, &num);
- if (ret)
- goto end;
-
- opts->bulk_buflen = num;
- ret = len;
-end:
- mutex_unlock(&opts->lock);
- return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_bulk_buflen =
- __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
- f_ss_opts_bulk_buflen_show,
- f_ss_opts_bulk_buflen_store);
-
-static struct configfs_attribute *ss_attrs[] = {
- &f_ss_opts_pattern.attr,
- &f_ss_opts_isoc_interval.attr,
- &f_ss_opts_isoc_maxpacket.attr,
- &f_ss_opts_isoc_mult.attr,
- &f_ss_opts_isoc_maxburst.attr,
- &f_ss_opts_bulk_buflen.attr,
- NULL,
-};
-
-static struct config_item_type ss_func_type = {
- .ct_item_ops = &ss_item_ops,
- .ct_attrs = ss_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void source_sink_free_instance(struct usb_function_instance *fi)
-{
- struct f_ss_opts *ss_opts;
-
- ss_opts = container_of(fi, struct f_ss_opts, func_inst);
- kfree(ss_opts);
-}
-
-static struct usb_function_instance *source_sink_alloc_inst(void)
-{
- struct f_ss_opts *ss_opts;
-
- ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
- if (!ss_opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&ss_opts->lock);
- ss_opts->func_inst.free_func_inst = source_sink_free_instance;
- ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
- ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
- ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
-
- config_group_init_type_name(&ss_opts->func_inst.group, "",
- &ss_func_type);
-
- return &ss_opts->func_inst;
-}
-DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
- source_sink_alloc_func);
-
-static int __init sslb_modinit(void)
-{
- int ret;
-
- ret = usb_function_register(&SourceSinkusb_func);
- if (ret)
- return ret;
- ret = lb_modinit();
- if (ret)
- usb_function_unregister(&SourceSinkusb_func);
- return ret;
-}
-static void __exit sslb_modexit(void)
-{
- usb_function_unregister(&SourceSinkusb_func);
- lb_modexit();
-}
-module_init(sslb_modinit);
-module_exit(sslb_modexit);
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * f_subset.c -- "CDC Subset" Ethernet link function driver
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/etherdevice.h>
-
-#include "u_ether.h"
-#include "u_ether_configfs.h"
-#include "u_gether.h"
-
-/*
- * This function packages a simple "CDC Subset" Ethernet port with no real
- * control mechanisms; just raw data transfer over two bulk endpoints.
- * The data transfer model is exactly that of CDC Ethernet, which is
- * why we call it the "CDC Subset".
- *
- * Because it's not standardized, this has some interoperability issues.
- * They mostly relate to driver binding, since the data transfer model is
- * so simple (CDC Ethernet). The original versions of this protocol used
- * specific product/vendor IDs: byteswapped IDs for Digital Equipment's
- * SA-1100 "Itsy" board, which could run Linux 2.4 kernels and supported
- * daughtercards with USB peripheral connectors. (It was used more often
- * with other boards, using the Itsy identifiers.) Linux hosts recognized
- * this with CONFIG_USB_ARMLINUX; these devices have only one configuration
- * and one interface.
- *
- * At some point, MCCI defined a (nonconformant) CDC MDLM variant called
- * "SAFE", which happens to have a mode which is identical to the "CDC
- * Subset" in terms of data transfer and lack of control model. This was
- * adopted by later Sharp Zaurus models, and by some other software which
- * Linux hosts recognize with CONFIG_USB_NET_ZAURUS.
- *
- * Because Microsoft's RNDIS drivers are far from robust, we added a few
- * descriptors to the CDC Subset code, making this code look like a SAFE
- * implementation. This lets you use MCCI's host side MS-Windows drivers
- * if you get fed up with RNDIS. It also makes it easier for composite
- * drivers to work, since they can use class based binding instead of
- * caring about specific product and vendor IDs.
- */
-
-struct f_gether {
- struct gether port;
-
- char ethaddr[14];
-};
-
-static inline struct f_gether *func_to_geth(struct usb_function *f)
-{
- return container_of(f, struct f_gether, port.func);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * "Simple" CDC-subset option is a simple vendor-neutral model that most
- * full speed controllers can handle: one interface, two bulk endpoints.
- * To assist host side drivers, we fancy it up a bit, and add descriptors so
- * some host side drivers will understand it as a "SAFE" variant.
- *
- * "SAFE" loosely follows CDC WMC MDLM, violating the spec in various ways.
- * Data endpoints live in the control interface, there's no data interface.
- * And it's not used to talk to a cell phone radio.
- */
-
-/* interface descriptor: */
-
-static struct usb_interface_descriptor subset_data_intf = {
- .bLength = sizeof subset_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- .bAlternateSetting = 0,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc mdlm_header_desc = {
- .bLength = sizeof mdlm_header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
-
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_mdlm_desc mdlm_desc = {
- .bLength = sizeof mdlm_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_MDLM_TYPE,
-
- .bcdVersion = cpu_to_le16(0x0100),
- .bGUID = {
- 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
- 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
- },
-};
-
-/* since "usb_cdc_mdlm_detail_desc" is a variable length structure, we
- * can't really use its struct. All we do here is say that we're using
- * the submode of "SAFE" which directly matches the CDC Subset.
- */
-static u8 mdlm_detail_desc[] = {
- 6,
- USB_DT_CS_INTERFACE,
- USB_CDC_MDLM_DETAIL_TYPE,
-
- 0, /* "SAFE" */
- 0, /* network control capabilities (none) */
- 0, /* network data capabilities ("raw" encapsulation) */
-};
-
-static struct usb_cdc_ether_desc ether_desc = {
- .bLength = sizeof ether_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
-
- /* this descriptor actually adds value, surprise! */
- /* .iMACAddress = DYNAMIC */
- .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
- .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
- .wNumberMCFilters = cpu_to_le16(0),
- .bNumberPowerFilters = 0,
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_subset_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_subset_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *fs_eth_function[] = {
- (struct usb_descriptor_header *) &subset_data_intf,
- (struct usb_descriptor_header *) &mdlm_header_desc,
- (struct usb_descriptor_header *) &mdlm_desc,
- (struct usb_descriptor_header *) &mdlm_detail_desc,
- (struct usb_descriptor_header *) ðer_desc,
- (struct usb_descriptor_header *) &fs_subset_in_desc,
- (struct usb_descriptor_header *) &fs_subset_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_subset_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_subset_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *hs_eth_function[] = {
- (struct usb_descriptor_header *) &subset_data_intf,
- (struct usb_descriptor_header *) &mdlm_header_desc,
- (struct usb_descriptor_header *) &mdlm_desc,
- (struct usb_descriptor_header *) &mdlm_detail_desc,
- (struct usb_descriptor_header *) ðer_desc,
- (struct usb_descriptor_header *) &hs_subset_in_desc,
- (struct usb_descriptor_header *) &hs_subset_out_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_subset_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor ss_subset_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_subset_bulk_comp_desc = {
- .bLength = sizeof ss_subset_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 2 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
-};
-
-static struct usb_descriptor_header *ss_eth_function[] = {
- (struct usb_descriptor_header *) &subset_data_intf,
- (struct usb_descriptor_header *) &mdlm_header_desc,
- (struct usb_descriptor_header *) &mdlm_desc,
- (struct usb_descriptor_header *) &mdlm_detail_desc,
- (struct usb_descriptor_header *) ðer_desc,
- (struct usb_descriptor_header *) &ss_subset_in_desc,
- (struct usb_descriptor_header *) &ss_subset_bulk_comp_desc,
- (struct usb_descriptor_header *) &ss_subset_out_desc,
- (struct usb_descriptor_header *) &ss_subset_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-static struct usb_string geth_string_defs[] = {
- [0].s = "CDC Ethernet Subset/SAFE",
- [1].s = "",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings geth_string_table = {
- .language = 0x0409, /* en-us */
- .strings = geth_string_defs,
-};
-
-static struct usb_gadget_strings *geth_strings[] = {
- &geth_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int geth_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_gether *geth = func_to_geth(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct net_device *net;
-
- /* we know alt == 0, so this is an activation or a reset */
-
- if (geth->port.in_ep->driver_data) {
- DBG(cdev, "reset cdc subset\n");
- gether_disconnect(&geth->port);
- }
-
- DBG(cdev, "init + activate cdc subset\n");
- if (config_ep_by_speed(cdev->gadget, f, geth->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f, geth->port.out_ep)) {
- geth->port.in_ep->desc = NULL;
- geth->port.out_ep->desc = NULL;
- return -EINVAL;
- }
-
- net = gether_connect(&geth->port);
- return PTR_ERR_OR_ZERO(net);
-}
-
-static void geth_disable(struct usb_function *f)
-{
- struct f_gether *geth = func_to_geth(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "net deactivated\n");
- gether_disconnect(&geth->port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* serial function driver setup/binding */
-
-static int
-geth_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_gether *geth = func_to_geth(f);
- struct usb_string *us;
- int status;
- struct usb_ep *ep;
-
- struct f_gether_opts *gether_opts;
-
- gether_opts = container_of(f->fi, struct f_gether_opts, func_inst);
-
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to gether_opts->bound access
- */
- if (!gether_opts->bound) {
- mutex_lock(&gether_opts->lock);
- gether_set_gadget(gether_opts->net, cdev->gadget);
- status = gether_register_netdev(gether_opts->net);
- mutex_unlock(&gether_opts->lock);
- if (status)
- return status;
- gether_opts->bound = true;
- }
-
- us = usb_gstrings_attach(cdev, geth_strings,
- ARRAY_SIZE(geth_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
-
- subset_data_intf.iInterface = us[0].id;
- ether_desc.iMACAddress = us[1].id;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- subset_data_intf.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_subset_in_desc);
- if (!ep)
- goto fail;
- geth->port.in_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_subset_out_desc);
- if (!ep)
- goto fail;
- geth->port.out_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- hs_subset_in_desc.bEndpointAddress = fs_subset_in_desc.bEndpointAddress;
- hs_subset_out_desc.bEndpointAddress =
- fs_subset_out_desc.bEndpointAddress;
-
- ss_subset_in_desc.bEndpointAddress = fs_subset_in_desc.bEndpointAddress;
- ss_subset_out_desc.bEndpointAddress =
- fs_subset_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, fs_eth_function, hs_eth_function,
- ss_eth_function);
- if (status)
- goto fail;
-
- /* NOTE: all that is done without knowing or caring about
- * the network link ... which is unavailable to this code
- * until we're activated via set_alt().
- */
-
- DBG(cdev, "CDC Subset: %s speed IN/%s OUT/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- geth->port.in_ep->name, geth->port.out_ep->name);
- return 0;
-
-fail:
- usb_free_all_descriptors(f);
- /* we might as well release our claims on endpoints */
- if (geth->port.out_ep)
- geth->port.out_ep->driver_data = NULL;
- if (geth->port.in_ep)
- geth->port.in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-static inline struct f_gether_opts *to_f_gether_opts(struct config_item *item)
-{
- return container_of(to_config_group(item), struct f_gether_opts,
- func_inst.group);
-}
-
-/* f_gether_item_ops */
-USB_ETHERNET_CONFIGFS_ITEM(gether);
-
-/* f_gether_opts_dev_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(gether);
-
-/* f_gether_opts_host_addr */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(gether);
-
-/* f_gether_opts_qmult */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(gether);
-
-/* f_gether_opts_ifname */
-USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(gether);
-
-static struct configfs_attribute *gether_attrs[] = {
- &f_gether_opts_dev_addr.attr,
- &f_gether_opts_host_addr.attr,
- &f_gether_opts_qmult.attr,
- &f_gether_opts_ifname.attr,
- NULL,
-};
-
-static struct config_item_type gether_func_type = {
- .ct_item_ops = &gether_item_ops,
- .ct_attrs = gether_attrs,
- .ct_owner = THIS_MODULE,
-};
-
-static void geth_free_inst(struct usb_function_instance *f)
-{
- struct f_gether_opts *opts;
-
- opts = container_of(f, struct f_gether_opts, func_inst);
- if (opts->bound)
- gether_cleanup(netdev_priv(opts->net));
- else
- free_netdev(opts->net);
- kfree(opts);
-}
-
-static struct usb_function_instance *geth_alloc_inst(void)
-{
- struct f_gether_opts *opts;
-
- opts = kzalloc(sizeof(*opts), GFP_KERNEL);
- if (!opts)
- return ERR_PTR(-ENOMEM);
- mutex_init(&opts->lock);
- opts->func_inst.free_func_inst = geth_free_inst;
- opts->net = gether_setup_default();
- if (IS_ERR(opts->net)) {
- struct net_device *net = opts->net;
- kfree(opts);
- return ERR_CAST(net);
- }
-
- config_group_init_type_name(&opts->func_inst.group, "",
- &gether_func_type);
-
- return &opts->func_inst;
-}
-
-static void geth_free(struct usb_function *f)
-{
- struct f_gether *eth;
-
- eth = func_to_geth(f);
- kfree(eth);
-}
-
-static void geth_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- geth_string_defs[0].id = 0;
- usb_free_all_descriptors(f);
-}
-
-static struct usb_function *geth_alloc(struct usb_function_instance *fi)
-{
- struct f_gether *geth;
- struct f_gether_opts *opts;
- int status;
-
- /* allocate and initialize one new instance */
- geth = kzalloc(sizeof(*geth), GFP_KERNEL);
- if (!geth)
- return ERR_PTR(-ENOMEM);
-
- opts = container_of(fi, struct f_gether_opts, func_inst);
-
- mutex_lock(&opts->lock);
- opts->refcnt++;
- /* export host's Ethernet address in CDC format */
- status = gether_get_host_addr_cdc(opts->net, geth->ethaddr,
- sizeof(geth->ethaddr));
- if (status < 12) {
- kfree(geth);
- mutex_unlock(&opts->lock);
- return ERR_PTR(-EINVAL);
- }
- geth_string_defs[1].s = geth->ethaddr;
-
- geth->port.ioport = netdev_priv(opts->net);
- mutex_unlock(&opts->lock);
- geth->port.cdc_filter = DEFAULT_FILTER;
-
- geth->port.func.name = "cdc_subset";
- geth->port.func.bind = geth_bind;
- geth->port.func.unbind = geth_unbind;
- geth->port.func.set_alt = geth_set_alt;
- geth->port.func.disable = geth_disable;
- geth->port.func.free_func = geth_free;
-
- return &geth->port.func;
-}
-
-DECLARE_USB_FUNCTION_INIT(geth, geth_alloc_inst, geth_alloc);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Brownell");
+++ /dev/null
-/*
- * f_audio.c -- USB Audio class function driver
- *
- * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
- * Copyright (C) 2008 Analog Devices, Inc
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/atomic.h>
-
-#include "u_uac1.h"
-
-#define OUT_EP_MAX_PACKET_SIZE 200
-static int req_buf_size = OUT_EP_MAX_PACKET_SIZE;
-module_param(req_buf_size, int, S_IRUGO);
-MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size");
-
-static int req_count = 256;
-module_param(req_count, int, S_IRUGO);
-MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count");
-
-static int audio_buf_size = 48000;
-module_param(audio_buf_size, int, S_IRUGO);
-MODULE_PARM_DESC(audio_buf_size, "Audio buffer size");
-
-static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value);
-static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
-
-/*
- * DESCRIPTORS ... most are static, but strings and full
- * configuration descriptors are built on demand.
- */
-
-/*
- * We have two interfaces- AudioControl and AudioStreaming
- * TODO: only supcard playback currently
- */
-#define F_AUDIO_AC_INTERFACE 0
-#define F_AUDIO_AS_INTERFACE 1
-#define F_AUDIO_NUM_INTERFACES 2
-
-/* B.3.1 Standard AC Interface Descriptor */
-static struct usb_interface_descriptor ac_interface_desc __initdata = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
-};
-
-DECLARE_UAC_AC_HEADER_DESCRIPTOR(2);
-
-#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES)
-/* 1 input terminal, 1 output terminal and 1 feature unit */
-#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \
- + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0))
-/* B.3.2 Class-Specific AC Interface Descriptor */
-static struct uac1_ac_header_descriptor_2 ac_header_desc = {
- .bLength = UAC_DT_AC_HEADER_LENGTH,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_HEADER,
- .bcdADC = __constant_cpu_to_le16(0x0100),
- .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH),
- .bInCollection = F_AUDIO_NUM_INTERFACES,
- .baInterfaceNr = {
- [0] = F_AUDIO_AC_INTERFACE,
- [1] = F_AUDIO_AS_INTERFACE,
- }
-};
-
-#define INPUT_TERMINAL_ID 1
-static struct uac_input_terminal_descriptor input_terminal_desc = {
- .bLength = UAC_DT_INPUT_TERMINAL_SIZE,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_INPUT_TERMINAL,
- .bTerminalID = INPUT_TERMINAL_ID,
- .wTerminalType = UAC_TERMINAL_STREAMING,
- .bAssocTerminal = 0,
- .wChannelConfig = 0x3,
-};
-
-DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0);
-
-#define FEATURE_UNIT_ID 2
-static struct uac_feature_unit_descriptor_0 feature_unit_desc = {
- .bLength = UAC_DT_FEATURE_UNIT_SIZE(0),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_FEATURE_UNIT,
- .bUnitID = FEATURE_UNIT_ID,
- .bSourceID = INPUT_TERMINAL_ID,
- .bControlSize = 2,
- .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME),
-};
-
-static struct usb_audio_control mute_control = {
- .list = LIST_HEAD_INIT(mute_control.list),
- .name = "Mute Control",
- .type = UAC_FU_MUTE,
- /* Todo: add real Mute control code */
- .set = generic_set_cmd,
- .get = generic_get_cmd,
-};
-
-static struct usb_audio_control volume_control = {
- .list = LIST_HEAD_INIT(volume_control.list),
- .name = "Volume Control",
- .type = UAC_FU_VOLUME,
- /* Todo: add real Volume control code */
- .set = generic_set_cmd,
- .get = generic_get_cmd,
-};
-
-static struct usb_audio_control_selector feature_unit = {
- .list = LIST_HEAD_INIT(feature_unit.list),
- .id = FEATURE_UNIT_ID,
- .name = "Mute & Volume Control",
- .type = UAC_FEATURE_UNIT,
- .desc = (struct usb_descriptor_header *)&feature_unit_desc,
-};
-
-#define OUTPUT_TERMINAL_ID 3
-static struct uac1_output_terminal_descriptor output_terminal_desc = {
- .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
- .bTerminalID = OUTPUT_TERMINAL_ID,
- .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER,
- .bAssocTerminal = FEATURE_UNIT_ID,
- .bSourceID = FEATURE_UNIT_ID,
-};
-
-/* B.4.1 Standard AS Interface Descriptor */
-static struct usb_interface_descriptor as_interface_alt_0_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
-};
-
-static struct usb_interface_descriptor as_interface_alt_1_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bAlternateSetting = 1,
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
-};
-
-/* B.4.2 Class-Specific AS Interface Descriptor */
-static struct uac1_as_header_descriptor as_header_desc = {
- .bLength = UAC_DT_AS_HEADER_SIZE,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_AS_GENERAL,
- .bTerminalLink = INPUT_TERMINAL_ID,
- .bDelay = 1,
- .wFormatTag = UAC_FORMAT_TYPE_I_PCM,
-};
-
-DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1);
-
-static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = {
- .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_FORMAT_TYPE,
- .bFormatType = UAC_FORMAT_TYPE_I,
- .bSubframeSize = 2,
- .bBitResolution = 16,
- .bSamFreqType = 1,
-};
-
-/* Standard ISO OUT Endpoint Descriptor */
-static struct usb_endpoint_descriptor as_out_ep_desc = {
- .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE
- | USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = __constant_cpu_to_le16(OUT_EP_MAX_PACKET_SIZE),
- .bInterval = 4,
-};
-
-/* Class-specific AS ISO OUT Endpoint Descriptor */
-static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = {
- .bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
- .bDescriptorType = USB_DT_CS_ENDPOINT,
- .bDescriptorSubtype = UAC_EP_GENERAL,
- .bmAttributes = 1,
- .bLockDelayUnits = 1,
- .wLockDelay = __constant_cpu_to_le16(1),
-};
-
-static struct usb_descriptor_header *f_audio_desc[] __initdata = {
- (struct usb_descriptor_header *)&ac_interface_desc,
- (struct usb_descriptor_header *)&ac_header_desc,
-
- (struct usb_descriptor_header *)&input_terminal_desc,
- (struct usb_descriptor_header *)&output_terminal_desc,
- (struct usb_descriptor_header *)&feature_unit_desc,
-
- (struct usb_descriptor_header *)&as_interface_alt_0_desc,
- (struct usb_descriptor_header *)&as_interface_alt_1_desc,
- (struct usb_descriptor_header *)&as_header_desc,
-
- (struct usb_descriptor_header *)&as_type_i_desc,
-
- (struct usb_descriptor_header *)&as_out_ep_desc,
- (struct usb_descriptor_header *)&as_iso_out_desc,
- NULL,
-};
-
-/*
- * This function is an ALSA sound card following USB Audio Class Spec 1.0.
- */
-
-/*-------------------------------------------------------------------------*/
-struct f_audio_buf {
- u8 *buf;
- int actual;
- struct list_head list;
-};
-
-static struct f_audio_buf *f_audio_buffer_alloc(int buf_size)
-{
- struct f_audio_buf *copy_buf;
-
- copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC);
- if (!copy_buf)
- return ERR_PTR(-ENOMEM);
-
- copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC);
- if (!copy_buf->buf) {
- kfree(copy_buf);
- return ERR_PTR(-ENOMEM);
- }
-
- return copy_buf;
-}
-
-static void f_audio_buffer_free(struct f_audio_buf *audio_buf)
-{
- kfree(audio_buf->buf);
- kfree(audio_buf);
-}
-/*-------------------------------------------------------------------------*/
-
-struct f_audio {
- struct gaudio card;
-
- /* endpoints handle full and/or high speeds */
- struct usb_ep *out_ep;
-
- spinlock_t lock;
- struct f_audio_buf *copy_buf;
- struct work_struct playback_work;
- struct list_head play_queue;
-
- /* Control Set command */
- struct list_head cs;
- u8 set_cmd;
- struct usb_audio_control *set_con;
-};
-
-static inline struct f_audio *func_to_audio(struct usb_function *f)
-{
- return container_of(f, struct f_audio, card.func);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void f_audio_playback_work(struct work_struct *data)
-{
- struct f_audio *audio = container_of(data, struct f_audio,
- playback_work);
- struct f_audio_buf *play_buf;
-
- spin_lock_irq(&audio->lock);
- if (list_empty(&audio->play_queue)) {
- spin_unlock_irq(&audio->lock);
- return;
- }
- play_buf = list_first_entry(&audio->play_queue,
- struct f_audio_buf, list);
- list_del(&play_buf->list);
- spin_unlock_irq(&audio->lock);
-
- u_audio_playback(&audio->card, play_buf->buf, play_buf->actual);
- f_audio_buffer_free(play_buf);
-}
-
-static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_audio *audio = req->context;
- struct usb_composite_dev *cdev = audio->card.func.config->cdev;
- struct f_audio_buf *copy_buf = audio->copy_buf;
- int err;
-
- if (!copy_buf)
- return -EINVAL;
-
- /* Copy buffer is full, add it to the play_queue */
- if (audio_buf_size - copy_buf->actual < req->actual) {
- list_add_tail(©_buf->list, &audio->play_queue);
- schedule_work(&audio->playback_work);
- copy_buf = f_audio_buffer_alloc(audio_buf_size);
- if (IS_ERR(copy_buf))
- return -ENOMEM;
- }
-
- memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual);
- copy_buf->actual += req->actual;
- audio->copy_buf = copy_buf;
-
- err = usb_ep_queue(ep, req, GFP_ATOMIC);
- if (err)
- ERROR(cdev, "%s queue req: %d\n", ep->name, err);
-
- return 0;
-
-}
-
-static void f_audio_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_audio *audio = req->context;
- int status = req->status;
- u32 data = 0;
- struct usb_ep *out_ep = audio->out_ep;
-
- switch (status) {
-
- case 0: /* normal completion? */
- if (ep == out_ep)
- f_audio_out_ep_complete(ep, req);
- else if (audio->set_con) {
- memcpy(&data, req->buf, req->length);
- audio->set_con->set(audio->set_con, audio->set_cmd,
- le16_to_cpu(data));
- audio->set_con = NULL;
- }
- break;
- default:
- break;
- }
-}
-
-static int audio_set_intf_req(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct f_audio *audio = func_to_audio(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
- u16 len = le16_to_cpu(ctrl->wLength);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u8 con_sel = (w_value >> 8) & 0xFF;
- u8 cmd = (ctrl->bRequest & 0x0F);
- struct usb_audio_control_selector *cs;
- struct usb_audio_control *con;
-
- DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
- ctrl->bRequest, w_value, len, id);
-
- list_for_each_entry(cs, &audio->cs, list) {
- if (cs->id == id) {
- list_for_each_entry(con, &cs->control, list) {
- if (con->type == con_sel) {
- audio->set_con = con;
- break;
- }
- }
- break;
- }
- }
-
- audio->set_cmd = cmd;
- req->context = audio;
- req->complete = f_audio_complete;
-
- return len;
-}
-
-static int audio_get_intf_req(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct f_audio *audio = func_to_audio(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
- u16 len = le16_to_cpu(ctrl->wLength);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u8 con_sel = (w_value >> 8) & 0xFF;
- u8 cmd = (ctrl->bRequest & 0x0F);
- struct usb_audio_control_selector *cs;
- struct usb_audio_control *con;
-
- DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
- ctrl->bRequest, w_value, len, id);
-
- list_for_each_entry(cs, &audio->cs, list) {
- if (cs->id == id) {
- list_for_each_entry(con, &cs->control, list) {
- if (con->type == con_sel && con->get) {
- value = con->get(con, cmd);
- break;
- }
- }
- break;
- }
- }
-
- req->context = audio;
- req->complete = f_audio_complete;
- len = min_t(size_t, sizeof(value), len);
- memcpy(req->buf, &value, len);
-
- return len;
-}
-
-static int audio_set_endpoint_req(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct usb_composite_dev *cdev = f->config->cdev;
- int value = -EOPNOTSUPP;
- u16 ep = le16_to_cpu(ctrl->wIndex);
- u16 len = le16_to_cpu(ctrl->wLength);
- u16 w_value = le16_to_cpu(ctrl->wValue);
-
- DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
- ctrl->bRequest, w_value, len, ep);
-
- switch (ctrl->bRequest) {
- case UAC_SET_CUR:
- value = len;
- break;
-
- case UAC_SET_MIN:
- break;
-
- case UAC_SET_MAX:
- break;
-
- case UAC_SET_RES:
- break;
-
- case UAC_SET_MEM:
- break;
-
- default:
- break;
- }
-
- return value;
-}
-
-static int audio_get_endpoint_req(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct usb_composite_dev *cdev = f->config->cdev;
- int value = -EOPNOTSUPP;
- u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
- u16 len = le16_to_cpu(ctrl->wLength);
- u16 w_value = le16_to_cpu(ctrl->wValue);
-
- DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
- ctrl->bRequest, w_value, len, ep);
-
- switch (ctrl->bRequest) {
- case UAC_GET_CUR:
- case UAC_GET_MIN:
- case UAC_GET_MAX:
- case UAC_GET_RES:
- value = len;
- break;
- case UAC_GET_MEM:
- break;
- default:
- break;
- }
-
- return value;
-}
-
-static int
-f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /* composite driver infrastructure handles everything; interface
- * activation uses set_alt().
- */
- switch (ctrl->bRequestType) {
- case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
- value = audio_set_intf_req(f, ctrl);
- break;
-
- case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
- value = audio_get_intf_req(f, ctrl);
- break;
-
- case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
- value = audio_set_endpoint_req(f, ctrl);
- break;
-
- case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
- value = audio_get_endpoint_req(f, ctrl);
- break;
-
- default:
- ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = 0;
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "audio response on err %d\n", value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_audio *audio = func_to_audio(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_ep *out_ep = audio->out_ep;
- struct usb_request *req;
- int i = 0, err = 0;
-
- DBG(cdev, "intf %d, alt %d\n", intf, alt);
-
- if (intf == 1) {
- if (alt == 1) {
- usb_ep_enable(out_ep);
- out_ep->driver_data = audio;
- audio->copy_buf = f_audio_buffer_alloc(audio_buf_size);
- if (IS_ERR(audio->copy_buf))
- return -ENOMEM;
-
- /*
- * allocate a bunch of read buffers
- * and queue them all at once.
- */
- for (i = 0; i < req_count && err == 0; i++) {
- req = usb_ep_alloc_request(out_ep, GFP_ATOMIC);
- if (req) {
- req->buf = kzalloc(req_buf_size,
- GFP_ATOMIC);
- if (req->buf) {
- req->length = req_buf_size;
- req->context = audio;
- req->complete =
- f_audio_complete;
- err = usb_ep_queue(out_ep,
- req, GFP_ATOMIC);
- if (err)
- ERROR(cdev,
- "%s queue req: %d\n",
- out_ep->name, err);
- } else
- err = -ENOMEM;
- } else
- err = -ENOMEM;
- }
-
- } else {
- struct f_audio_buf *copy_buf = audio->copy_buf;
- if (copy_buf) {
- list_add_tail(©_buf->list,
- &audio->play_queue);
- schedule_work(&audio->playback_work);
- }
- }
- }
-
- return err;
-}
-
-static void f_audio_disable(struct usb_function *f)
-{
- return;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void f_audio_build_desc(struct f_audio *audio)
-{
- struct gaudio *card = &audio->card;
- u8 *sam_freq;
- int rate;
-
- /* Set channel numbers */
- input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card);
- as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card);
-
- /* Set sample rates */
- rate = u_audio_get_playback_rate(card);
- sam_freq = as_type_i_desc.tSamFreq[0];
- memcpy(sam_freq, &rate, 3);
-
- /* Todo: Set Sample bits and other parameters */
-
- return;
-}
-
-/* audio function driver setup/binding */
-static int __init
-f_audio_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_audio *audio = func_to_audio(f);
- int status;
- struct usb_ep *ep = NULL;
-
- f_audio_build_desc(audio);
-
- /* allocate instance-specific interface IDs, and patch descriptors */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ac_interface_desc.bInterfaceNumber = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- as_interface_alt_0_desc.bInterfaceNumber = status;
- as_interface_alt_1_desc.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
- if (!ep)
- goto fail;
- audio->out_ep = ep;
- audio->out_ep->desc = &as_out_ep_desc;
- ep->driver_data = cdev; /* claim */
-
- status = -ENOMEM;
-
- /* copy descriptors, and track endpoint copies */
- status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL);
- if (status)
- goto fail;
- return 0;
-
-fail:
- if (ep)
- ep->driver_data = NULL;
- return status;
-}
-
-static void
-f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_audio *audio = func_to_audio(f);
-
- usb_free_all_descriptors(f);
- kfree(audio);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value)
-{
- con->data[cmd] = value;
-
- return 0;
-}
-
-static int generic_get_cmd(struct usb_audio_control *con, u8 cmd)
-{
- return con->data[cmd];
-}
-
-/* Todo: add more control selecotor dynamically */
-static int __init control_selector_init(struct f_audio *audio)
-{
- INIT_LIST_HEAD(&audio->cs);
- list_add(&feature_unit.list, &audio->cs);
-
- INIT_LIST_HEAD(&feature_unit.control);
- list_add(&mute_control.list, &feature_unit.control);
- list_add(&volume_control.list, &feature_unit.control);
-
- volume_control.data[UAC__CUR] = 0xffc0;
- volume_control.data[UAC__MIN] = 0xe3a0;
- volume_control.data[UAC__MAX] = 0xfff0;
- volume_control.data[UAC__RES] = 0x0030;
-
- return 0;
-}
-
-/**
- * audio_bind_config - add USB audio function to a configuration
- * @c: the configuration to supcard the USB audio function
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- */
-static int __init audio_bind_config(struct usb_configuration *c)
-{
- struct f_audio *audio;
- int status;
-
- /* allocate and initialize one new instance */
- audio = kzalloc(sizeof *audio, GFP_KERNEL);
- if (!audio)
- return -ENOMEM;
-
- audio->card.func.name = "g_audio";
- audio->card.gadget = c->cdev->gadget;
-
- INIT_LIST_HEAD(&audio->play_queue);
- spin_lock_init(&audio->lock);
-
- /* set up ASLA audio devices */
- status = gaudio_setup(&audio->card);
- if (status < 0)
- goto setup_fail;
-
- audio->card.func.strings = audio_strings;
- audio->card.func.bind = f_audio_bind;
- audio->card.func.unbind = f_audio_unbind;
- audio->card.func.set_alt = f_audio_set_alt;
- audio->card.func.setup = f_audio_setup;
- audio->card.func.disable = f_audio_disable;
-
- control_selector_init(audio);
-
- INIT_WORK(&audio->playback_work, f_audio_playback_work);
-
- status = usb_add_function(c, &audio->card.func);
- if (status)
- goto add_fail;
-
- INFO(c->cdev, "audio_buf_size %d, req_buf_size %d, req_count %d\n",
- audio_buf_size, req_buf_size, req_count);
-
- return status;
-
-add_fail:
- gaudio_cleanup();
-setup_fail:
- kfree(audio);
- return status;
-}
+++ /dev/null
-/*
- * f_uac2.c -- USB Audio Class 2.0 Function
- *
- * Copyright (C) 2011
- * Yadwinder Singh (yadi.brar01@gmail.com)
- * Jaswinder Singh (jaswinder.singh@linaro.org)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/usb/audio.h>
-#include <linux/usb/audio-v2.h>
-#include <linux/platform_device.h>
-#include <linux/module.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-
-/* Playback(USB-IN) Default Stereo - Fl/Fr */
-static int p_chmask = 0x3;
-module_param(p_chmask, uint, S_IRUGO);
-MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");
-
-/* Playback Default 48 KHz */
-static int p_srate = 48000;
-module_param(p_srate, uint, S_IRUGO);
-MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");
-
-/* Playback Default 16bits/sample */
-static int p_ssize = 2;
-module_param(p_ssize, uint, S_IRUGO);
-MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");
-
-/* Capture(USB-OUT) Default Stereo - Fl/Fr */
-static int c_chmask = 0x3;
-module_param(c_chmask, uint, S_IRUGO);
-MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");
-
-/* Capture Default 64 KHz */
-static int c_srate = 64000;
-module_param(c_srate, uint, S_IRUGO);
-MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");
-
-/* Capture Default 16bits/sample */
-static int c_ssize = 2;
-module_param(c_ssize, uint, S_IRUGO);
-MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
-
-/* Keep everyone on toes */
-#define USB_XFERS 2
-
-/*
- * The driver implements a simple UAC_2 topology.
- * USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
- * ALSA_Playback -> IT_2 -> OT_4 -> USB-IN
- * Capture and Playback sampling rates are independently
- * controlled by two clock sources :
- * CLK_5 := c_srate, and CLK_6 := p_srate
- */
-#define USB_OUT_IT_ID 1
-#define IO_IN_IT_ID 2
-#define IO_OUT_OT_ID 3
-#define USB_IN_OT_ID 4
-#define USB_OUT_CLK_ID 5
-#define USB_IN_CLK_ID 6
-
-#define CONTROL_ABSENT 0
-#define CONTROL_RDONLY 1
-#define CONTROL_RDWR 3
-
-#define CLK_FREQ_CTRL 0
-#define CLK_VLD_CTRL 2
-
-#define COPY_CTRL 0
-#define CONN_CTRL 2
-#define OVRLD_CTRL 4
-#define CLSTR_CTRL 6
-#define UNFLW_CTRL 8
-#define OVFLW_CTRL 10
-
-const char *uac2_name = "snd_uac2";
-
-struct uac2_req {
- struct uac2_rtd_params *pp; /* parent param */
- struct usb_request *req;
-};
-
-struct uac2_rtd_params {
- struct snd_uac2_chip *uac2; /* parent chip */
- bool ep_enabled; /* if the ep is enabled */
- /* Size of the ring buffer */
- size_t dma_bytes;
- unsigned char *dma_area;
-
- struct snd_pcm_substream *ss;
-
- /* Ring buffer */
- ssize_t hw_ptr;
-
- void *rbuf;
-
- size_t period_size;
-
- unsigned max_psize;
- struct uac2_req ureq[USB_XFERS];
-
- spinlock_t lock;
-};
-
-struct snd_uac2_chip {
- struct platform_device pdev;
- struct platform_driver pdrv;
-
- struct uac2_rtd_params p_prm;
- struct uac2_rtd_params c_prm;
-
- struct snd_card *card;
- struct snd_pcm *pcm;
-};
-
-#define BUFF_SIZE_MAX (PAGE_SIZE * 16)
-#define PRD_SIZE_MAX PAGE_SIZE
-#define MIN_PERIODS 4
-
-static struct snd_pcm_hardware uac2_pcm_hardware = {
- .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER
- | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
- | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
- .rates = SNDRV_PCM_RATE_CONTINUOUS,
- .periods_max = BUFF_SIZE_MAX / PRD_SIZE_MAX,
- .buffer_bytes_max = BUFF_SIZE_MAX,
- .period_bytes_max = PRD_SIZE_MAX,
- .periods_min = MIN_PERIODS,
-};
-
-struct audio_dev {
- u8 ac_intf, ac_alt;
- u8 as_out_intf, as_out_alt;
- u8 as_in_intf, as_in_alt;
-
- struct usb_ep *in_ep, *out_ep;
- struct usb_function func;
-
- /* The ALSA Sound Card it represents on the USB-Client side */
- struct snd_uac2_chip uac2;
-};
-
-static struct audio_dev *agdev_g;
-
-static inline
-struct audio_dev *func_to_agdev(struct usb_function *f)
-{
- return container_of(f, struct audio_dev, func);
-}
-
-static inline
-struct audio_dev *uac2_to_agdev(struct snd_uac2_chip *u)
-{
- return container_of(u, struct audio_dev, uac2);
-}
-
-static inline
-struct snd_uac2_chip *pdev_to_uac2(struct platform_device *p)
-{
- return container_of(p, struct snd_uac2_chip, pdev);
-}
-
-static inline
-uint num_channels(uint chanmask)
-{
- uint num = 0;
-
- while (chanmask) {
- num += (chanmask & 1);
- chanmask >>= 1;
- }
-
- return num;
-}
-
-static void
-agdev_iso_complete(struct usb_ep *ep, struct usb_request *req)
-{
- unsigned pending;
- unsigned long flags;
- bool update_alsa = false;
- unsigned char *src, *dst;
- int status = req->status;
- struct uac2_req *ur = req->context;
- struct snd_pcm_substream *substream;
- struct uac2_rtd_params *prm = ur->pp;
- struct snd_uac2_chip *uac2 = prm->uac2;
-
- /* i/f shutting down */
- if (!prm->ep_enabled || req->status == -ESHUTDOWN)
- return;
-
- /*
- * We can't really do much about bad xfers.
- * Afterall, the ISOCH xfers could fail legitimately.
- */
- if (status)
- pr_debug("%s: iso_complete status(%d) %d/%d\n",
- __func__, status, req->actual, req->length);
-
- substream = prm->ss;
-
- /* Do nothing if ALSA isn't active */
- if (!substream)
- goto exit;
-
- spin_lock_irqsave(&prm->lock, flags);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- src = prm->dma_area + prm->hw_ptr;
- req->actual = req->length;
- dst = req->buf;
- } else {
- dst = prm->dma_area + prm->hw_ptr;
- src = req->buf;
- }
-
- pending = prm->hw_ptr % prm->period_size;
- pending += req->actual;
- if (pending >= prm->period_size)
- update_alsa = true;
-
- prm->hw_ptr = (prm->hw_ptr + req->actual) % prm->dma_bytes;
-
- spin_unlock_irqrestore(&prm->lock, flags);
-
- /* Pack USB load in ALSA ring buffer */
- memcpy(dst, src, req->actual);
-exit:
- if (usb_ep_queue(ep, req, GFP_ATOMIC))
- dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__);
-
- if (update_alsa)
- snd_pcm_period_elapsed(substream);
-
- return;
-}
-
-static int
-uac2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
- struct uac2_rtd_params *prm;
- unsigned long flags;
- int err = 0;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prm = &uac2->p_prm;
- else
- prm = &uac2->c_prm;
-
- spin_lock_irqsave(&prm->lock, flags);
-
- /* Reset */
- prm->hw_ptr = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- prm->ss = substream;
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- prm->ss = NULL;
- break;
- default:
- err = -EINVAL;
- }
-
- spin_unlock_irqrestore(&prm->lock, flags);
-
- /* Clear buffer after Play stops */
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !prm->ss)
- memset(prm->rbuf, 0, prm->max_psize * USB_XFERS);
-
- return err;
-}
-
-static snd_pcm_uframes_t uac2_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
- struct uac2_rtd_params *prm;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prm = &uac2->p_prm;
- else
- prm = &uac2->c_prm;
-
- return bytes_to_frames(substream->runtime, prm->hw_ptr);
-}
-
-static int uac2_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
- struct uac2_rtd_params *prm;
- int err;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prm = &uac2->p_prm;
- else
- prm = &uac2->c_prm;
-
- err = snd_pcm_lib_malloc_pages(substream,
- params_buffer_bytes(hw_params));
- if (err >= 0) {
- prm->dma_bytes = substream->runtime->dma_bytes;
- prm->dma_area = substream->runtime->dma_area;
- prm->period_size = params_period_bytes(hw_params);
- }
-
- return err;
-}
-
-static int uac2_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
- struct uac2_rtd_params *prm;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prm = &uac2->p_prm;
- else
- prm = &uac2->c_prm;
-
- prm->dma_area = NULL;
- prm->dma_bytes = 0;
- prm->period_size = 0;
-
- return snd_pcm_lib_free_pages(substream);
-}
-
-static int uac2_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
-
- runtime->hw = uac2_pcm_hardware;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- spin_lock_init(&uac2->p_prm.lock);
- runtime->hw.rate_min = p_srate;
- runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; /* ! p_ssize ! */
- runtime->hw.channels_min = num_channels(p_chmask);
- runtime->hw.period_bytes_min = 2 * uac2->p_prm.max_psize
- / runtime->hw.periods_min;
- } else {
- spin_lock_init(&uac2->c_prm.lock);
- runtime->hw.rate_min = c_srate;
- runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; /* ! c_ssize ! */
- runtime->hw.channels_min = num_channels(c_chmask);
- runtime->hw.period_bytes_min = 2 * uac2->c_prm.max_psize
- / runtime->hw.periods_min;
- }
-
- runtime->hw.rate_max = runtime->hw.rate_min;
- runtime->hw.channels_max = runtime->hw.channels_min;
-
- snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
-
- return 0;
-}
-
-/* ALSA cries without these function pointers */
-static int uac2_pcm_null(struct snd_pcm_substream *substream)
-{
- return 0;
-}
-
-static struct snd_pcm_ops uac2_pcm_ops = {
- .open = uac2_pcm_open,
- .close = uac2_pcm_null,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = uac2_pcm_hw_params,
- .hw_free = uac2_pcm_hw_free,
- .trigger = uac2_pcm_trigger,
- .pointer = uac2_pcm_pointer,
- .prepare = uac2_pcm_null,
-};
-
-static int snd_uac2_probe(struct platform_device *pdev)
-{
- struct snd_uac2_chip *uac2 = pdev_to_uac2(pdev);
- struct snd_card *card;
- struct snd_pcm *pcm;
- int err;
-
- /* Choose any slot, with no id */
- err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card);
- if (err < 0)
- return err;
-
- uac2->card = card;
-
- /*
- * Create first PCM device
- * Create a substream only for non-zero channel streams
- */
- err = snd_pcm_new(uac2->card, "UAC2 PCM", 0,
- p_chmask ? 1 : 0, c_chmask ? 1 : 0, &pcm);
- if (err < 0)
- goto snd_fail;
-
- strcpy(pcm->name, "UAC2 PCM");
- pcm->private_data = uac2;
-
- uac2->pcm = pcm;
-
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac2_pcm_ops);
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac2_pcm_ops);
-
- strcpy(card->driver, "UAC2_Gadget");
- strcpy(card->shortname, "UAC2_Gadget");
- sprintf(card->longname, "UAC2_Gadget %i", pdev->id);
-
- snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
- snd_dma_continuous_data(GFP_KERNEL), 0, BUFF_SIZE_MAX);
-
- err = snd_card_register(card);
- if (!err) {
- platform_set_drvdata(pdev, card);
- return 0;
- }
-
-snd_fail:
- snd_card_free(card);
-
- uac2->pcm = NULL;
- uac2->card = NULL;
-
- return err;
-}
-
-static int snd_uac2_remove(struct platform_device *pdev)
-{
- struct snd_card *card = platform_get_drvdata(pdev);
-
- if (card)
- return snd_card_free(card);
-
- return 0;
-}
-
-static int alsa_uac2_init(struct audio_dev *agdev)
-{
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- int err;
-
- uac2->pdrv.probe = snd_uac2_probe;
- uac2->pdrv.remove = snd_uac2_remove;
- uac2->pdrv.driver.name = uac2_name;
-
- uac2->pdev.id = 0;
- uac2->pdev.name = uac2_name;
-
- /* Register snd_uac2 driver */
- err = platform_driver_register(&uac2->pdrv);
- if (err)
- return err;
-
- /* Register snd_uac2 device */
- err = platform_device_register(&uac2->pdev);
- if (err)
- platform_driver_unregister(&uac2->pdrv);
-
- return err;
-}
-
-static void alsa_uac2_exit(struct audio_dev *agdev)
-{
- struct snd_uac2_chip *uac2 = &agdev->uac2;
-
- platform_driver_unregister(&uac2->pdrv);
- platform_device_unregister(&uac2->pdev);
-}
-
-
-/* --------- USB Function Interface ------------- */
-
-enum {
- STR_ASSOC,
- STR_IF_CTRL,
- STR_CLKSRC_IN,
- STR_CLKSRC_OUT,
- STR_USB_IT,
- STR_IO_IT,
- STR_USB_OT,
- STR_IO_OT,
- STR_AS_OUT_ALT0,
- STR_AS_OUT_ALT1,
- STR_AS_IN_ALT0,
- STR_AS_IN_ALT1,
-};
-
-static char clksrc_in[8];
-static char clksrc_out[8];
-
-static struct usb_string strings_fn[] = {
- [STR_ASSOC].s = "Source/Sink",
- [STR_IF_CTRL].s = "Topology Control",
- [STR_CLKSRC_IN].s = clksrc_in,
- [STR_CLKSRC_OUT].s = clksrc_out,
- [STR_USB_IT].s = "USBH Out",
- [STR_IO_IT].s = "USBD Out",
- [STR_USB_OT].s = "USBH In",
- [STR_IO_OT].s = "USBD In",
- [STR_AS_OUT_ALT0].s = "Playback Inactive",
- [STR_AS_OUT_ALT1].s = "Playback Active",
- [STR_AS_IN_ALT0].s = "Capture Inactive",
- [STR_AS_IN_ALT1].s = "Capture Active",
- { },
-};
-
-static struct usb_gadget_strings str_fn = {
- .language = 0x0409, /* en-us */
- .strings = strings_fn,
-};
-
-static struct usb_gadget_strings *fn_strings[] = {
- &str_fn,
- NULL,
-};
-
-static struct usb_qualifier_descriptor devqual_desc = {
- .bLength = sizeof devqual_desc,
- .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
-
- .bcdUSB = cpu_to_le16(0x200),
- .bDeviceClass = USB_CLASS_MISC,
- .bDeviceSubClass = 0x02,
- .bDeviceProtocol = 0x01,
- .bNumConfigurations = 1,
- .bRESERVED = 0,
-};
-
-static struct usb_interface_assoc_descriptor iad_desc = {
- .bLength = sizeof iad_desc,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- .bFirstInterface = 0,
- .bInterfaceCount = 3,
- .bFunctionClass = USB_CLASS_AUDIO,
- .bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED,
- .bFunctionProtocol = UAC_VERSION_2,
-};
-
-/* Audio Control Interface */
-static struct usb_interface_descriptor std_ac_if_desc = {
- .bLength = sizeof std_ac_if_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
- .bInterfaceProtocol = UAC_VERSION_2,
-};
-
-/* Clock source for IN traffic */
-struct uac_clock_source_descriptor in_clk_src_desc = {
- .bLength = sizeof in_clk_src_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC2_CLOCK_SOURCE,
- .bClockID = USB_IN_CLK_ID,
- .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
- .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
- .bAssocTerminal = 0,
-};
-
-/* Clock source for OUT traffic */
-struct uac_clock_source_descriptor out_clk_src_desc = {
- .bLength = sizeof out_clk_src_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC2_CLOCK_SOURCE,
- .bClockID = USB_OUT_CLK_ID,
- .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
- .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
- .bAssocTerminal = 0,
-};
-
-/* Input Terminal for USB_OUT */
-struct uac2_input_terminal_descriptor usb_out_it_desc = {
- .bLength = sizeof usb_out_it_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_INPUT_TERMINAL,
- .bTerminalID = USB_OUT_IT_ID,
- .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
- .bAssocTerminal = 0,
- .bCSourceID = USB_OUT_CLK_ID,
- .iChannelNames = 0,
- .bmControls = (CONTROL_RDWR << COPY_CTRL),
-};
-
-/* Input Terminal for I/O-In */
-struct uac2_input_terminal_descriptor io_in_it_desc = {
- .bLength = sizeof io_in_it_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_INPUT_TERMINAL,
- .bTerminalID = IO_IN_IT_ID,
- .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED),
- .bAssocTerminal = 0,
- .bCSourceID = USB_IN_CLK_ID,
- .iChannelNames = 0,
- .bmControls = (CONTROL_RDWR << COPY_CTRL),
-};
-
-/* Ouput Terminal for USB_IN */
-struct uac2_output_terminal_descriptor usb_in_ot_desc = {
- .bLength = sizeof usb_in_ot_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
- .bTerminalID = USB_IN_OT_ID,
- .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
- .bAssocTerminal = 0,
- .bSourceID = IO_IN_IT_ID,
- .bCSourceID = USB_IN_CLK_ID,
- .bmControls = (CONTROL_RDWR << COPY_CTRL),
-};
-
-/* Ouput Terminal for I/O-Out */
-struct uac2_output_terminal_descriptor io_out_ot_desc = {
- .bLength = sizeof io_out_ot_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
- .bTerminalID = IO_OUT_OT_ID,
- .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED),
- .bAssocTerminal = 0,
- .bSourceID = USB_OUT_IT_ID,
- .bCSourceID = USB_OUT_CLK_ID,
- .bmControls = (CONTROL_RDWR << COPY_CTRL),
-};
-
-struct uac2_ac_header_descriptor ac_hdr_desc = {
- .bLength = sizeof ac_hdr_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_MS_HEADER,
- .bcdADC = cpu_to_le16(0x200),
- .bCategory = UAC2_FUNCTION_IO_BOX,
- .wTotalLength = sizeof in_clk_src_desc + sizeof out_clk_src_desc
- + sizeof usb_out_it_desc + sizeof io_in_it_desc
- + sizeof usb_in_ot_desc + sizeof io_out_ot_desc,
- .bmControls = 0,
-};
-
-/* Audio Streaming OUT Interface - Alt0 */
-static struct usb_interface_descriptor std_as_out_if0_desc = {
- .bLength = sizeof std_as_out_if0_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
- .bInterfaceProtocol = UAC_VERSION_2,
-};
-
-/* Audio Streaming OUT Interface - Alt1 */
-static struct usb_interface_descriptor std_as_out_if1_desc = {
- .bLength = sizeof std_as_out_if1_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 1,
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
- .bInterfaceProtocol = UAC_VERSION_2,
-};
-
-/* Audio Stream OUT Intface Desc */
-struct uac2_as_header_descriptor as_out_hdr_desc = {
- .bLength = sizeof as_out_hdr_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_AS_GENERAL,
- .bTerminalLink = USB_OUT_IT_ID,
- .bmControls = 0,
- .bFormatType = UAC_FORMAT_TYPE_I,
- .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
- .iChannelNames = 0,
-};
-
-/* Audio USB_OUT Format */
-struct uac2_format_type_i_descriptor as_out_fmt1_desc = {
- .bLength = sizeof as_out_fmt1_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_FORMAT_TYPE,
- .bFormatType = UAC_FORMAT_TYPE_I,
-};
-
-/* STD AS ISO OUT Endpoint */
-struct usb_endpoint_descriptor fs_epout_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
- .bInterval = 1,
-};
-
-struct usb_endpoint_descriptor hs_epout_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
- .bInterval = 4,
-};
-
-/* CS AS ISO OUT Endpoint */
-static struct uac2_iso_endpoint_descriptor as_iso_out_desc = {
- .bLength = sizeof as_iso_out_desc,
- .bDescriptorType = USB_DT_CS_ENDPOINT,
-
- .bDescriptorSubtype = UAC_EP_GENERAL,
- .bmAttributes = 0,
- .bmControls = 0,
- .bLockDelayUnits = 0,
- .wLockDelay = 0,
-};
-
-/* Audio Streaming IN Interface - Alt0 */
-static struct usb_interface_descriptor std_as_in_if0_desc = {
- .bLength = sizeof std_as_in_if0_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
- .bInterfaceProtocol = UAC_VERSION_2,
-};
-
-/* Audio Streaming IN Interface - Alt1 */
-static struct usb_interface_descriptor std_as_in_if1_desc = {
- .bLength = sizeof std_as_in_if1_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bAlternateSetting = 1,
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_AUDIO,
- .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
- .bInterfaceProtocol = UAC_VERSION_2,
-};
-
-/* Audio Stream IN Intface Desc */
-struct uac2_as_header_descriptor as_in_hdr_desc = {
- .bLength = sizeof as_in_hdr_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
-
- .bDescriptorSubtype = UAC_AS_GENERAL,
- .bTerminalLink = USB_IN_OT_ID,
- .bmControls = 0,
- .bFormatType = UAC_FORMAT_TYPE_I,
- .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
- .iChannelNames = 0,
-};
-
-/* Audio USB_IN Format */
-struct uac2_format_type_i_descriptor as_in_fmt1_desc = {
- .bLength = sizeof as_in_fmt1_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubtype = UAC_FORMAT_TYPE,
- .bFormatType = UAC_FORMAT_TYPE_I,
-};
-
-/* STD AS ISO IN Endpoint */
-struct usb_endpoint_descriptor fs_epin_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
- .bInterval = 1,
-};
-
-struct usb_endpoint_descriptor hs_epin_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
- .bInterval = 4,
-};
-
-/* CS AS ISO IN Endpoint */
-static struct uac2_iso_endpoint_descriptor as_iso_in_desc = {
- .bLength = sizeof as_iso_in_desc,
- .bDescriptorType = USB_DT_CS_ENDPOINT,
-
- .bDescriptorSubtype = UAC_EP_GENERAL,
- .bmAttributes = 0,
- .bmControls = 0,
- .bLockDelayUnits = 0,
- .wLockDelay = 0,
-};
-
-static struct usb_descriptor_header *fs_audio_desc[] = {
- (struct usb_descriptor_header *)&iad_desc,
- (struct usb_descriptor_header *)&std_ac_if_desc,
-
- (struct usb_descriptor_header *)&ac_hdr_desc,
- (struct usb_descriptor_header *)&in_clk_src_desc,
- (struct usb_descriptor_header *)&out_clk_src_desc,
- (struct usb_descriptor_header *)&usb_out_it_desc,
- (struct usb_descriptor_header *)&io_in_it_desc,
- (struct usb_descriptor_header *)&usb_in_ot_desc,
- (struct usb_descriptor_header *)&io_out_ot_desc,
-
- (struct usb_descriptor_header *)&std_as_out_if0_desc,
- (struct usb_descriptor_header *)&std_as_out_if1_desc,
-
- (struct usb_descriptor_header *)&as_out_hdr_desc,
- (struct usb_descriptor_header *)&as_out_fmt1_desc,
- (struct usb_descriptor_header *)&fs_epout_desc,
- (struct usb_descriptor_header *)&as_iso_out_desc,
-
- (struct usb_descriptor_header *)&std_as_in_if0_desc,
- (struct usb_descriptor_header *)&std_as_in_if1_desc,
-
- (struct usb_descriptor_header *)&as_in_hdr_desc,
- (struct usb_descriptor_header *)&as_in_fmt1_desc,
- (struct usb_descriptor_header *)&fs_epin_desc,
- (struct usb_descriptor_header *)&as_iso_in_desc,
- NULL,
-};
-
-static struct usb_descriptor_header *hs_audio_desc[] = {
- (struct usb_descriptor_header *)&iad_desc,
- (struct usb_descriptor_header *)&std_ac_if_desc,
-
- (struct usb_descriptor_header *)&ac_hdr_desc,
- (struct usb_descriptor_header *)&in_clk_src_desc,
- (struct usb_descriptor_header *)&out_clk_src_desc,
- (struct usb_descriptor_header *)&usb_out_it_desc,
- (struct usb_descriptor_header *)&io_in_it_desc,
- (struct usb_descriptor_header *)&usb_in_ot_desc,
- (struct usb_descriptor_header *)&io_out_ot_desc,
-
- (struct usb_descriptor_header *)&std_as_out_if0_desc,
- (struct usb_descriptor_header *)&std_as_out_if1_desc,
-
- (struct usb_descriptor_header *)&as_out_hdr_desc,
- (struct usb_descriptor_header *)&as_out_fmt1_desc,
- (struct usb_descriptor_header *)&hs_epout_desc,
- (struct usb_descriptor_header *)&as_iso_out_desc,
-
- (struct usb_descriptor_header *)&std_as_in_if0_desc,
- (struct usb_descriptor_header *)&std_as_in_if1_desc,
-
- (struct usb_descriptor_header *)&as_in_hdr_desc,
- (struct usb_descriptor_header *)&as_in_fmt1_desc,
- (struct usb_descriptor_header *)&hs_epin_desc,
- (struct usb_descriptor_header *)&as_iso_in_desc,
- NULL,
-};
-
-struct cntrl_cur_lay3 {
- __u32 dCUR;
-};
-
-struct cntrl_range_lay3 {
- __u16 wNumSubRanges;
- __u32 dMIN;
- __u32 dMAX;
- __u32 dRES;
-} __packed;
-
-static inline void
-free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep)
-{
- struct snd_uac2_chip *uac2 = prm->uac2;
- int i;
-
- prm->ep_enabled = false;
-
- for (i = 0; i < USB_XFERS; i++) {
- if (prm->ureq[i].req) {
- usb_ep_dequeue(ep, prm->ureq[i].req);
- usb_ep_free_request(ep, prm->ureq[i].req);
- prm->ureq[i].req = NULL;
- }
- }
-
- if (usb_ep_disable(ep))
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
-}
-
-static int __init
-afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
-{
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- struct usb_composite_dev *cdev = cfg->cdev;
- struct usb_gadget *gadget = cdev->gadget;
- struct uac2_rtd_params *prm;
- int ret;
-
- ret = usb_interface_id(cfg, fn);
- if (ret < 0) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return ret;
- }
- std_ac_if_desc.bInterfaceNumber = ret;
- agdev->ac_intf = ret;
- agdev->ac_alt = 0;
-
- ret = usb_interface_id(cfg, fn);
- if (ret < 0) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return ret;
- }
- std_as_out_if0_desc.bInterfaceNumber = ret;
- std_as_out_if1_desc.bInterfaceNumber = ret;
- agdev->as_out_intf = ret;
- agdev->as_out_alt = 0;
-
- ret = usb_interface_id(cfg, fn);
- if (ret < 0) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return ret;
- }
- std_as_in_if0_desc.bInterfaceNumber = ret;
- std_as_in_if1_desc.bInterfaceNumber = ret;
- agdev->as_in_intf = ret;
- agdev->as_in_alt = 0;
-
- agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
- if (!agdev->out_ep) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- goto err;
- }
- agdev->out_ep->driver_data = agdev;
-
- agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
- if (!agdev->in_ep) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- goto err;
- }
- agdev->in_ep->driver_data = agdev;
-
- uac2->p_prm.uac2 = uac2;
- uac2->c_prm.uac2 = uac2;
-
- hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
- hs_epout_desc.wMaxPacketSize = fs_epout_desc.wMaxPacketSize;
- hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
- hs_epin_desc.wMaxPacketSize = fs_epin_desc.wMaxPacketSize;
-
- ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL);
- if (ret)
- goto err;
-
- prm = &agdev->uac2.c_prm;
- prm->max_psize = hs_epout_desc.wMaxPacketSize;
- prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
- if (!prm->rbuf) {
- prm->max_psize = 0;
- goto err;
- }
-
- prm = &agdev->uac2.p_prm;
- prm->max_psize = hs_epin_desc.wMaxPacketSize;
- prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
- if (!prm->rbuf) {
- prm->max_psize = 0;
- goto err;
- }
-
- ret = alsa_uac2_init(agdev);
- if (ret)
- goto err;
- return 0;
-err:
- kfree(agdev->uac2.p_prm.rbuf);
- kfree(agdev->uac2.c_prm.rbuf);
- usb_free_all_descriptors(fn);
- if (agdev->in_ep)
- agdev->in_ep->driver_data = NULL;
- if (agdev->out_ep)
- agdev->out_ep->driver_data = NULL;
- return -EINVAL;
-}
-
-static void
-afunc_unbind(struct usb_configuration *cfg, struct usb_function *fn)
-{
- struct audio_dev *agdev = func_to_agdev(fn);
- struct uac2_rtd_params *prm;
-
- alsa_uac2_exit(agdev);
-
- prm = &agdev->uac2.p_prm;
- kfree(prm->rbuf);
-
- prm = &agdev->uac2.c_prm;
- kfree(prm->rbuf);
- usb_free_all_descriptors(fn);
-
- if (agdev->in_ep)
- agdev->in_ep->driver_data = NULL;
- if (agdev->out_ep)
- agdev->out_ep->driver_data = NULL;
-}
-
-static int
-afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
-{
- struct usb_composite_dev *cdev = fn->config->cdev;
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- struct usb_gadget *gadget = cdev->gadget;
- struct usb_request *req;
- struct usb_ep *ep;
- struct uac2_rtd_params *prm;
- int i;
-
- /* No i/f has more than 2 alt settings */
- if (alt > 1) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return -EINVAL;
- }
-
- if (intf == agdev->ac_intf) {
- /* Control I/f has only 1 AltSetting - 0 */
- if (alt) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return -EINVAL;
- }
- return 0;
- }
-
- if (intf == agdev->as_out_intf) {
- ep = agdev->out_ep;
- prm = &uac2->c_prm;
- config_ep_by_speed(gadget, fn, ep);
- agdev->as_out_alt = alt;
- } else if (intf == agdev->as_in_intf) {
- ep = agdev->in_ep;
- prm = &uac2->p_prm;
- config_ep_by_speed(gadget, fn, ep);
- agdev->as_in_alt = alt;
- } else {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return -EINVAL;
- }
-
- if (alt == 0) {
- free_ep(prm, ep);
- return 0;
- }
-
- prm->ep_enabled = true;
- usb_ep_enable(ep);
-
- for (i = 0; i < USB_XFERS; i++) {
- if (prm->ureq[i].req) {
- if (usb_ep_queue(ep, prm->ureq[i].req, GFP_ATOMIC))
- dev_err(&uac2->pdev.dev, "%d Error!\n",
- __LINE__);
- continue;
- }
-
- req = usb_ep_alloc_request(ep, GFP_ATOMIC);
- if (req == NULL) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return -EINVAL;
- }
-
- prm->ureq[i].req = req;
- prm->ureq[i].pp = prm;
-
- req->zero = 0;
- req->context = &prm->ureq[i];
- req->length = prm->max_psize;
- req->complete = agdev_iso_complete;
- req->buf = prm->rbuf + i * req->length;
-
- if (usb_ep_queue(ep, req, GFP_ATOMIC))
- dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__);
- }
-
- return 0;
-}
-
-static int
-afunc_get_alt(struct usb_function *fn, unsigned intf)
-{
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
-
- if (intf == agdev->ac_intf)
- return agdev->ac_alt;
- else if (intf == agdev->as_out_intf)
- return agdev->as_out_alt;
- else if (intf == agdev->as_in_intf)
- return agdev->as_in_alt;
- else
- dev_err(&uac2->pdev.dev,
- "%s:%d Invalid Interface %d!\n",
- __func__, __LINE__, intf);
-
- return -EINVAL;
-}
-
-static void
-afunc_disable(struct usb_function *fn)
-{
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
-
- free_ep(&uac2->p_prm, agdev->in_ep);
- agdev->as_in_alt = 0;
-
- free_ep(&uac2->c_prm, agdev->out_ep);
- agdev->as_out_alt = 0;
-}
-
-static int
-in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
-{
- struct usb_request *req = fn->config->cdev->req;
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- u16 w_length = le16_to_cpu(cr->wLength);
- u16 w_index = le16_to_cpu(cr->wIndex);
- u16 w_value = le16_to_cpu(cr->wValue);
- u8 entity_id = (w_index >> 8) & 0xff;
- u8 control_selector = w_value >> 8;
- int value = -EOPNOTSUPP;
-
- if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
- struct cntrl_cur_lay3 c;
-
- if (entity_id == USB_IN_CLK_ID)
- c.dCUR = p_srate;
- else if (entity_id == USB_OUT_CLK_ID)
- c.dCUR = c_srate;
-
- value = min_t(unsigned, w_length, sizeof c);
- memcpy(req->buf, &c, value);
- } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
- *(u8 *)req->buf = 1;
- value = min_t(unsigned, w_length, 1);
- } else {
- dev_err(&uac2->pdev.dev,
- "%s:%d control_selector=%d TODO!\n",
- __func__, __LINE__, control_selector);
- }
-
- return value;
-}
-
-static int
-in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
-{
- struct usb_request *req = fn->config->cdev->req;
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- u16 w_length = le16_to_cpu(cr->wLength);
- u16 w_index = le16_to_cpu(cr->wIndex);
- u16 w_value = le16_to_cpu(cr->wValue);
- u8 entity_id = (w_index >> 8) & 0xff;
- u8 control_selector = w_value >> 8;
- struct cntrl_range_lay3 r;
- int value = -EOPNOTSUPP;
-
- if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
- if (entity_id == USB_IN_CLK_ID)
- r.dMIN = p_srate;
- else if (entity_id == USB_OUT_CLK_ID)
- r.dMIN = c_srate;
- else
- return -EOPNOTSUPP;
-
- r.dMAX = r.dMIN;
- r.dRES = 0;
- r.wNumSubRanges = 1;
-
- value = min_t(unsigned, w_length, sizeof r);
- memcpy(req->buf, &r, value);
- } else {
- dev_err(&uac2->pdev.dev,
- "%s:%d control_selector=%d TODO!\n",
- __func__, __LINE__, control_selector);
- }
-
- return value;
-}
-
-static int
-ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr)
-{
- if (cr->bRequest == UAC2_CS_CUR)
- return in_rq_cur(fn, cr);
- else if (cr->bRequest == UAC2_CS_RANGE)
- return in_rq_range(fn, cr);
- else
- return -EOPNOTSUPP;
-}
-
-static int
-out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
-{
- u16 w_length = le16_to_cpu(cr->wLength);
- u16 w_value = le16_to_cpu(cr->wValue);
- u8 control_selector = w_value >> 8;
-
- if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
- return w_length;
-
- return -EOPNOTSUPP;
-}
-
-static int
-setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr)
-{
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- u16 w_index = le16_to_cpu(cr->wIndex);
- u8 intf = w_index & 0xff;
-
- if (intf != agdev->ac_intf) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- return -EOPNOTSUPP;
- }
-
- if (cr->bRequestType & USB_DIR_IN)
- return ac_rq_in(fn, cr);
- else if (cr->bRequest == UAC2_CS_CUR)
- return out_rq_cur(fn, cr);
-
- return -EOPNOTSUPP;
-}
-
-static int
-afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr)
-{
- struct usb_composite_dev *cdev = fn->config->cdev;
- struct audio_dev *agdev = func_to_agdev(fn);
- struct snd_uac2_chip *uac2 = &agdev->uac2;
- struct usb_request *req = cdev->req;
- u16 w_length = le16_to_cpu(cr->wLength);
- int value = -EOPNOTSUPP;
-
- /* Only Class specific requests are supposed to reach here */
- if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS)
- return -EOPNOTSUPP;
-
- if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE)
- value = setup_rq_inf(fn, cr);
- else
- dev_err(&uac2->pdev.dev, "%s:%d Error!\n", __func__, __LINE__);
-
- if (value >= 0) {
- req->length = value;
- req->zero = value < w_length;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0) {
- dev_err(&uac2->pdev.dev,
- "%s:%d Error!\n", __func__, __LINE__);
- req->status = 0;
- }
- }
-
- return value;
-}
-
-static int audio_bind_config(struct usb_configuration *cfg)
-{
- int res;
-
- agdev_g = kzalloc(sizeof *agdev_g, GFP_KERNEL);
- if (agdev_g == NULL)
- return -ENOMEM;
-
- res = usb_string_ids_tab(cfg->cdev, strings_fn);
- if (res)
- return res;
- iad_desc.iFunction = strings_fn[STR_ASSOC].id;
- std_ac_if_desc.iInterface = strings_fn[STR_IF_CTRL].id;
- in_clk_src_desc.iClockSource = strings_fn[STR_CLKSRC_IN].id;
- out_clk_src_desc.iClockSource = strings_fn[STR_CLKSRC_OUT].id;
- usb_out_it_desc.iTerminal = strings_fn[STR_USB_IT].id;
- io_in_it_desc.iTerminal = strings_fn[STR_IO_IT].id;
- usb_in_ot_desc.iTerminal = strings_fn[STR_USB_OT].id;
- io_out_ot_desc.iTerminal = strings_fn[STR_IO_OT].id;
- std_as_out_if0_desc.iInterface = strings_fn[STR_AS_OUT_ALT0].id;
- std_as_out_if1_desc.iInterface = strings_fn[STR_AS_OUT_ALT1].id;
- std_as_in_if0_desc.iInterface = strings_fn[STR_AS_IN_ALT0].id;
- std_as_in_if1_desc.iInterface = strings_fn[STR_AS_IN_ALT1].id;
-
- agdev_g->func.name = "uac2_func";
- agdev_g->func.strings = fn_strings;
- agdev_g->func.bind = afunc_bind;
- agdev_g->func.unbind = afunc_unbind;
- agdev_g->func.set_alt = afunc_set_alt;
- agdev_g->func.get_alt = afunc_get_alt;
- agdev_g->func.disable = afunc_disable;
- agdev_g->func.setup = afunc_setup;
-
- /* Initialize the configurable parameters */
- usb_out_it_desc.bNrChannels = num_channels(c_chmask);
- usb_out_it_desc.bmChannelConfig = cpu_to_le32(c_chmask);
- io_in_it_desc.bNrChannels = num_channels(p_chmask);
- io_in_it_desc.bmChannelConfig = cpu_to_le32(p_chmask);
- as_out_hdr_desc.bNrChannels = num_channels(c_chmask);
- as_out_hdr_desc.bmChannelConfig = cpu_to_le32(c_chmask);
- as_in_hdr_desc.bNrChannels = num_channels(p_chmask);
- as_in_hdr_desc.bmChannelConfig = cpu_to_le32(p_chmask);
- as_out_fmt1_desc.bSubslotSize = c_ssize;
- as_out_fmt1_desc.bBitResolution = c_ssize * 8;
- as_in_fmt1_desc.bSubslotSize = p_ssize;
- as_in_fmt1_desc.bBitResolution = p_ssize * 8;
-
- snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", p_srate);
- snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", c_srate);
-
- res = usb_add_function(cfg, &agdev_g->func);
- if (res < 0)
- kfree(agdev_g);
-
- return res;
-}
-
-static void
-uac2_unbind_config(struct usb_configuration *cfg)
-{
- kfree(agdev_g);
- agdev_g = NULL;
-}
+++ /dev/null
-/*
- * uvc_gadget.c -- USB Video Class Gadget driver
- *
- * Copyright (C) 2009-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/string.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/video.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-
-#include <media/v4l2-dev.h>
-#include <media/v4l2-event.h>
-
-#include "uvc.h"
-
-unsigned int uvc_gadget_trace_param;
-
-/*-------------------------------------------------------------------------*/
-
-/* module parameters specific to the Video streaming endpoint */
-static unsigned int streaming_interval = 1;
-module_param(streaming_interval, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_interval, "1 - 16");
-
-static unsigned int streaming_maxpacket = 1024;
-module_param(streaming_maxpacket, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_maxpacket, "1 - 1023 (FS), 1 - 3072 (hs/ss)");
-
-static unsigned int streaming_maxburst;
-module_param(streaming_maxburst, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)");
-
-/* --------------------------------------------------------------------------
- * Function descriptors
- */
-
-/* string IDs are assigned dynamically */
-
-#define UVC_STRING_CONTROL_IDX 0
-#define UVC_STRING_STREAMING_IDX 1
-
-static struct usb_string uvc_en_us_strings[] = {
- [UVC_STRING_CONTROL_IDX].s = "UVC Camera",
- [UVC_STRING_STREAMING_IDX].s = "Video Streaming",
- { }
-};
-
-static struct usb_gadget_strings uvc_stringtab = {
- .language = 0x0409, /* en-us */
- .strings = uvc_en_us_strings,
-};
-
-static struct usb_gadget_strings *uvc_function_strings[] = {
- &uvc_stringtab,
- NULL,
-};
-
-#define UVC_INTF_VIDEO_CONTROL 0
-#define UVC_INTF_VIDEO_STREAMING 1
-
-#define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */
-
-static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
- .bLength = sizeof(uvc_iad),
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
- .bFirstInterface = 0,
- .bInterfaceCount = 2,
- .bFunctionClass = USB_CLASS_VIDEO,
- .bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION,
- .bFunctionProtocol = 0x00,
- .iFunction = 0,
-};
-
-static struct usb_interface_descriptor uvc_control_intf __initdata = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = UVC_INTF_VIDEO_CONTROL,
- .bAlternateSetting = 0,
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_VIDEO,
- .bInterfaceSubClass = UVC_SC_VIDEOCONTROL,
- .bInterfaceProtocol = 0x00,
- .iInterface = 0,
-};
-
-static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
- .bInterval = 8,
-};
-
-static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
- .bLength = sizeof(uvc_ss_control_comp),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
- /* The following 3 values can be tweaked if necessary. */
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
-};
-
-static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
- .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_CS_ENDPOINT,
- .bDescriptorSubType = UVC_EP_INTERRUPT,
- .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
-};
-
-static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
- .bAlternateSetting = 0,
- .bNumEndpoints = 0,
- .bInterfaceClass = USB_CLASS_VIDEO,
- .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
- .bInterfaceProtocol = 0x00,
- .iInterface = 0,
-};
-
-static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
- .bAlternateSetting = 1,
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_VIDEO,
- .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
- .bInterfaceProtocol = 0x00,
- .iInterface = 0,
-};
-
-static struct usb_endpoint_descriptor uvc_fs_streaming_ep __initdata = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
- | USB_ENDPOINT_XFER_ISOC,
- /* The wMaxPacketSize and bInterval values will be initialized from
- * module parameters.
- */
-};
-
-static struct usb_endpoint_descriptor uvc_hs_streaming_ep __initdata = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
- | USB_ENDPOINT_XFER_ISOC,
- /* The wMaxPacketSize and bInterval values will be initialized from
- * module parameters.
- */
-};
-
-static struct usb_endpoint_descriptor uvc_ss_streaming_ep __initdata = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
- | USB_ENDPOINT_XFER_ISOC,
- /* The wMaxPacketSize and bInterval values will be initialized from
- * module parameters.
- */
-};
-
-static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp __initdata = {
- .bLength = sizeof(uvc_ss_streaming_comp),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
- /* The bMaxBurst, bmAttributes and wBytesPerInterval values will be
- * initialized from module parameters.
- */
-};
-
-static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
- (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
- (struct usb_descriptor_header *) &uvc_fs_streaming_ep,
- NULL,
-};
-
-static const struct usb_descriptor_header * const uvc_hs_streaming[] = {
- (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
- (struct usb_descriptor_header *) &uvc_hs_streaming_ep,
- NULL,
-};
-
-static const struct usb_descriptor_header * const uvc_ss_streaming[] = {
- (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
- (struct usb_descriptor_header *) &uvc_ss_streaming_ep,
- (struct usb_descriptor_header *) &uvc_ss_streaming_comp,
- NULL,
-};
-
-/* --------------------------------------------------------------------------
- * Control requests
- */
-
-static void
-uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct uvc_device *uvc = req->context;
- struct v4l2_event v4l2_event;
- struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
-
- if (uvc->event_setup_out) {
- uvc->event_setup_out = 0;
-
- memset(&v4l2_event, 0, sizeof(v4l2_event));
- v4l2_event.type = UVC_EVENT_DATA;
- uvc_event->data.length = req->actual;
- memcpy(&uvc_event->data.data, req->buf, req->actual);
- v4l2_event_queue(uvc->vdev, &v4l2_event);
- }
-}
-
-static int
-uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct uvc_device *uvc = to_uvc(f);
- struct v4l2_event v4l2_event;
- struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
-
- /* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n",
- * ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue),
- * le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength));
- */
-
- if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) {
- INFO(f->config->cdev, "invalid request type\n");
- return -EINVAL;
- }
-
- /* Stall too big requests. */
- if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE)
- return -EINVAL;
-
- memset(&v4l2_event, 0, sizeof(v4l2_event));
- v4l2_event.type = UVC_EVENT_SETUP;
- memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req));
- v4l2_event_queue(uvc->vdev, &v4l2_event);
-
- return 0;
-}
-
-void uvc_function_setup_continue(struct uvc_device *uvc)
-{
- struct usb_composite_dev *cdev = uvc->func.config->cdev;
-
- usb_composite_setup_continue(cdev);
-}
-
-static int
-uvc_function_get_alt(struct usb_function *f, unsigned interface)
-{
- struct uvc_device *uvc = to_uvc(f);
-
- INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface);
-
- if (interface == uvc->control_intf)
- return 0;
- else if (interface != uvc->streaming_intf)
- return -EINVAL;
- else
- return uvc->state == UVC_STATE_STREAMING ? 1 : 0;
-}
-
-static int
-uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
-{
- struct uvc_device *uvc = to_uvc(f);
- struct v4l2_event v4l2_event;
- struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
- int ret;
-
- INFO(f->config->cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt);
-
- if (interface == uvc->control_intf) {
- if (alt)
- return -EINVAL;
-
- if (uvc->state == UVC_STATE_DISCONNECTED) {
- memset(&v4l2_event, 0, sizeof(v4l2_event));
- v4l2_event.type = UVC_EVENT_CONNECT;
- uvc_event->speed = f->config->cdev->gadget->speed;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
-
- uvc->state = UVC_STATE_CONNECTED;
- }
-
- return 0;
- }
-
- if (interface != uvc->streaming_intf)
- return -EINVAL;
-
- /* TODO
- if (usb_endpoint_xfer_bulk(&uvc->desc.vs_ep))
- return alt ? -EINVAL : 0;
- */
-
- switch (alt) {
- case 0:
- if (uvc->state != UVC_STATE_STREAMING)
- return 0;
-
- if (uvc->video.ep)
- usb_ep_disable(uvc->video.ep);
-
- memset(&v4l2_event, 0, sizeof(v4l2_event));
- v4l2_event.type = UVC_EVENT_STREAMOFF;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
-
- uvc->state = UVC_STATE_CONNECTED;
- return 0;
-
- case 1:
- if (uvc->state != UVC_STATE_CONNECTED)
- return 0;
-
- if (uvc->video.ep) {
- ret = config_ep_by_speed(f->config->cdev->gadget,
- &(uvc->func), uvc->video.ep);
- if (ret)
- return ret;
- usb_ep_enable(uvc->video.ep);
- }
-
- memset(&v4l2_event, 0, sizeof(v4l2_event));
- v4l2_event.type = UVC_EVENT_STREAMON;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
- return USB_GADGET_DELAYED_STATUS;
-
- default:
- return -EINVAL;
- }
-}
-
-static void
-uvc_function_disable(struct usb_function *f)
-{
- struct uvc_device *uvc = to_uvc(f);
- struct v4l2_event v4l2_event;
-
- INFO(f->config->cdev, "uvc_function_disable\n");
-
- memset(&v4l2_event, 0, sizeof(v4l2_event));
- v4l2_event.type = UVC_EVENT_DISCONNECT;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
-
- uvc->state = UVC_STATE_DISCONNECTED;
-}
-
-/* --------------------------------------------------------------------------
- * Connection / disconnection
- */
-
-void
-uvc_function_connect(struct uvc_device *uvc)
-{
- struct usb_composite_dev *cdev = uvc->func.config->cdev;
- int ret;
-
- if ((ret = usb_function_activate(&uvc->func)) < 0)
- INFO(cdev, "UVC connect failed with %d\n", ret);
-}
-
-void
-uvc_function_disconnect(struct uvc_device *uvc)
-{
- struct usb_composite_dev *cdev = uvc->func.config->cdev;
- int ret;
-
- if ((ret = usb_function_deactivate(&uvc->func)) < 0)
- INFO(cdev, "UVC disconnect failed with %d\n", ret);
-}
-
-/* --------------------------------------------------------------------------
- * USB probe and disconnect
- */
-
-static int
-uvc_register_video(struct uvc_device *uvc)
-{
- struct usb_composite_dev *cdev = uvc->func.config->cdev;
- struct video_device *video;
-
- /* TODO reference counting. */
- video = video_device_alloc();
- if (video == NULL)
- return -ENOMEM;
-
- video->v4l2_dev = &uvc->v4l2_dev;
- video->fops = &uvc_v4l2_fops;
- video->release = video_device_release;
- strlcpy(video->name, cdev->gadget->name, sizeof(video->name));
-
- uvc->vdev = video;
- video_set_drvdata(video, uvc);
-
- return video_register_device(video, VFL_TYPE_GRABBER, -1);
-}
-
-#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
- do { \
- memcpy(mem, desc, (desc)->bLength); \
- *(dst)++ = mem; \
- mem += (desc)->bLength; \
- } while (0);
-
-#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
- do { \
- const struct usb_descriptor_header * const *__src; \
- for (__src = src; *__src; ++__src) { \
- memcpy(mem, *__src, (*__src)->bLength); \
- *dst++ = mem; \
- mem += (*__src)->bLength; \
- } \
- } while (0)
-
-static struct usb_descriptor_header ** __init
-uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
-{
- struct uvc_input_header_descriptor *uvc_streaming_header;
- struct uvc_header_descriptor *uvc_control_header;
- const struct uvc_descriptor_header * const *uvc_control_desc;
- const struct uvc_descriptor_header * const *uvc_streaming_cls;
- const struct usb_descriptor_header * const *uvc_streaming_std;
- const struct usb_descriptor_header * const *src;
- struct usb_descriptor_header **dst;
- struct usb_descriptor_header **hdr;
- unsigned int control_size;
- unsigned int streaming_size;
- unsigned int n_desc;
- unsigned int bytes;
- void *mem;
-
- switch (speed) {
- case USB_SPEED_SUPER:
- uvc_control_desc = uvc->desc.ss_control;
- uvc_streaming_cls = uvc->desc.ss_streaming;
- uvc_streaming_std = uvc_ss_streaming;
- break;
-
- case USB_SPEED_HIGH:
- uvc_control_desc = uvc->desc.fs_control;
- uvc_streaming_cls = uvc->desc.hs_streaming;
- uvc_streaming_std = uvc_hs_streaming;
- break;
-
- case USB_SPEED_FULL:
- default:
- uvc_control_desc = uvc->desc.fs_control;
- uvc_streaming_cls = uvc->desc.fs_streaming;
- uvc_streaming_std = uvc_fs_streaming;
- break;
- }
-
- /* Descriptors layout
- *
- * uvc_iad
- * uvc_control_intf
- * Class-specific UVC control descriptors
- * uvc_control_ep
- * uvc_control_cs_ep
- * uvc_ss_control_comp (for SS only)
- * uvc_streaming_intf_alt0
- * Class-specific UVC streaming descriptors
- * uvc_{fs|hs}_streaming
- */
-
- /* Count descriptors and compute their size. */
- control_size = 0;
- streaming_size = 0;
- bytes = uvc_iad.bLength + uvc_control_intf.bLength
- + uvc_control_ep.bLength + uvc_control_cs_ep.bLength
- + uvc_streaming_intf_alt0.bLength;
-
- if (speed == USB_SPEED_SUPER) {
- bytes += uvc_ss_control_comp.bLength;
- n_desc = 6;
- } else {
- n_desc = 5;
- }
-
- for (src = (const struct usb_descriptor_header **)uvc_control_desc;
- *src; ++src) {
- control_size += (*src)->bLength;
- bytes += (*src)->bLength;
- n_desc++;
- }
- for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
- *src; ++src) {
- streaming_size += (*src)->bLength;
- bytes += (*src)->bLength;
- n_desc++;
- }
- for (src = uvc_streaming_std; *src; ++src) {
- bytes += (*src)->bLength;
- n_desc++;
- }
-
- mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
- if (mem == NULL)
- return NULL;
-
- hdr = mem;
- dst = mem;
- mem += (n_desc + 1) * sizeof(*src);
-
- /* Copy the descriptors. */
- UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
- UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
-
- uvc_control_header = mem;
- UVC_COPY_DESCRIPTORS(mem, dst,
- (const struct usb_descriptor_header **)uvc_control_desc);
- uvc_control_header->wTotalLength = cpu_to_le16(control_size);
- uvc_control_header->bInCollection = 1;
- uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
-
- UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
- if (speed == USB_SPEED_SUPER)
- UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
-
- UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
- UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
-
- uvc_streaming_header = mem;
- UVC_COPY_DESCRIPTORS(mem, dst,
- (const struct usb_descriptor_header**)uvc_streaming_cls);
- uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
- uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
-
- UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
-
- *dst = NULL;
- return hdr;
-}
-
-static void
-uvc_function_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct uvc_device *uvc = to_uvc(f);
-
- INFO(cdev, "uvc_function_unbind\n");
-
- video_unregister_device(uvc->vdev);
- v4l2_device_unregister(&uvc->v4l2_dev);
- uvc->control_ep->driver_data = NULL;
- uvc->video.ep->driver_data = NULL;
-
- uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = 0;
- usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
- kfree(uvc->control_buf);
-
- usb_free_all_descriptors(f);
-
- kfree(uvc);
-}
-
-static int __init
-uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct uvc_device *uvc = to_uvc(f);
- unsigned int max_packet_mult;
- unsigned int max_packet_size;
- struct usb_ep *ep;
- int ret = -EINVAL;
-
- INFO(cdev, "uvc_function_bind\n");
-
- /* Sanity check the streaming endpoint module parameters.
- */
- streaming_interval = clamp(streaming_interval, 1U, 16U);
- streaming_maxpacket = clamp(streaming_maxpacket, 1U, 3072U);
- streaming_maxburst = min(streaming_maxburst, 15U);
-
- /* Fill in the FS/HS/SS Video Streaming specific descriptors from the
- * module parameters.
- *
- * NOTE: We assume that the user knows what they are doing and won't
- * give parameters that their UDC doesn't support.
- */
- if (streaming_maxpacket <= 1024) {
- max_packet_mult = 1;
- max_packet_size = streaming_maxpacket;
- } else if (streaming_maxpacket <= 2048) {
- max_packet_mult = 2;
- max_packet_size = streaming_maxpacket / 2;
- } else {
- max_packet_mult = 3;
- max_packet_size = streaming_maxpacket / 3;
- }
-
- uvc_fs_streaming_ep.wMaxPacketSize = min(streaming_maxpacket, 1023U);
- uvc_fs_streaming_ep.bInterval = streaming_interval;
-
- uvc_hs_streaming_ep.wMaxPacketSize = max_packet_size;
- uvc_hs_streaming_ep.wMaxPacketSize |= ((max_packet_mult - 1) << 11);
- uvc_hs_streaming_ep.bInterval = streaming_interval;
-
- uvc_ss_streaming_ep.wMaxPacketSize = max_packet_size;
- uvc_ss_streaming_ep.bInterval = streaming_interval;
- uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1;
- uvc_ss_streaming_comp.bMaxBurst = streaming_maxburst;
- uvc_ss_streaming_comp.wBytesPerInterval =
- max_packet_size * max_packet_mult * streaming_maxburst;
-
- /* Allocate endpoints. */
- ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
- if (!ep) {
- INFO(cdev, "Unable to allocate control EP\n");
- goto error;
- }
- uvc->control_ep = ep;
- ep->driver_data = uvc;
-
- if (gadget_is_superspeed(c->cdev->gadget))
- ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
- &uvc_ss_streaming_comp);
- else if (gadget_is_dualspeed(cdev->gadget))
- ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep);
- else
- ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
-
- if (!ep) {
- INFO(cdev, "Unable to allocate streaming EP\n");
- goto error;
- }
- uvc->video.ep = ep;
- ep->driver_data = uvc;
-
- uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
- uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
- uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
-
- /* Allocate interface IDs. */
- if ((ret = usb_interface_id(c, f)) < 0)
- goto error;
- uvc_iad.bFirstInterface = ret;
- uvc_control_intf.bInterfaceNumber = ret;
- uvc->control_intf = ret;
-
- if ((ret = usb_interface_id(c, f)) < 0)
- goto error;
- uvc_streaming_intf_alt0.bInterfaceNumber = ret;
- uvc_streaming_intf_alt1.bInterfaceNumber = ret;
- uvc->streaming_intf = ret;
-
- /* Copy descriptors */
- f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
- if (gadget_is_dualspeed(cdev->gadget))
- f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
- if (gadget_is_superspeed(c->cdev->gadget))
- f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
-
- /* Preallocate control endpoint request. */
- uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
- uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
- if (uvc->control_req == NULL || uvc->control_buf == NULL) {
- ret = -ENOMEM;
- goto error;
- }
-
- uvc->control_req->buf = uvc->control_buf;
- uvc->control_req->complete = uvc_function_ep0_complete;
- uvc->control_req->context = uvc;
-
- /* Avoid letting this gadget enumerate until the userspace server is
- * active.
- */
- if ((ret = usb_function_deactivate(f)) < 0)
- goto error;
-
- if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
- printk(KERN_INFO "v4l2_device_register failed\n");
- goto error;
- }
-
- /* Initialise video. */
- ret = uvc_video_init(&uvc->video);
- if (ret < 0)
- goto error;
-
- /* Register a V4L2 device. */
- ret = uvc_register_video(uvc);
- if (ret < 0) {
- printk(KERN_INFO "Unable to register video device\n");
- goto error;
- }
-
- return 0;
-
-error:
- v4l2_device_unregister(&uvc->v4l2_dev);
- if (uvc->vdev)
- video_device_release(uvc->vdev);
-
- if (uvc->control_ep)
- uvc->control_ep->driver_data = NULL;
- if (uvc->video.ep)
- uvc->video.ep->driver_data = NULL;
-
- if (uvc->control_req) {
- usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
- kfree(uvc->control_buf);
- }
-
- usb_free_all_descriptors(f);
- return ret;
-}
-
-/* --------------------------------------------------------------------------
- * USB gadget function
- */
-
-/**
- * uvc_bind_config - add a UVC function to a configuration
- * @c: the configuration to support the UVC instance
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- *
- * Caller must have called @uvc_setup(). Caller is also responsible for
- * calling @uvc_cleanup() before module unload.
- */
-int __init
-uvc_bind_config(struct usb_configuration *c,
- const struct uvc_descriptor_header * const *fs_control,
- const struct uvc_descriptor_header * const *ss_control,
- const struct uvc_descriptor_header * const *fs_streaming,
- const struct uvc_descriptor_header * const *hs_streaming,
- const struct uvc_descriptor_header * const *ss_streaming)
-{
- struct uvc_device *uvc;
- int ret = 0;
-
- /* TODO Check if the USB device controller supports the required
- * features.
- */
- if (!gadget_is_dualspeed(c->cdev->gadget))
- return -EINVAL;
-
- uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
- if (uvc == NULL)
- return -ENOMEM;
-
- uvc->state = UVC_STATE_DISCONNECTED;
-
- /* Validate the descriptors. */
- if (fs_control == NULL || fs_control[0] == NULL ||
- fs_control[0]->bDescriptorSubType != UVC_VC_HEADER)
- goto error;
-
- if (ss_control == NULL || ss_control[0] == NULL ||
- ss_control[0]->bDescriptorSubType != UVC_VC_HEADER)
- goto error;
-
- if (fs_streaming == NULL || fs_streaming[0] == NULL ||
- fs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
- goto error;
-
- if (hs_streaming == NULL || hs_streaming[0] == NULL ||
- hs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
- goto error;
-
- if (ss_streaming == NULL || ss_streaming[0] == NULL ||
- ss_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
- goto error;
-
- uvc->desc.fs_control = fs_control;
- uvc->desc.ss_control = ss_control;
- uvc->desc.fs_streaming = fs_streaming;
- uvc->desc.hs_streaming = hs_streaming;
- uvc->desc.ss_streaming = ss_streaming;
-
- /* String descriptors are global, we only need to allocate string IDs
- * for the first UVC function. UVC functions beyond the first (if any)
- * will reuse the same IDs.
- */
- if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) {
- ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings);
- if (ret)
- goto error;
- uvc_iad.iFunction =
- uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
- uvc_control_intf.iInterface =
- uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
- ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id;
- uvc_streaming_intf_alt0.iInterface = ret;
- uvc_streaming_intf_alt1.iInterface = ret;
- }
-
- /* Register the function. */
- uvc->func.name = "uvc";
- uvc->func.strings = uvc_function_strings;
- uvc->func.bind = uvc_function_bind;
- uvc->func.unbind = uvc_function_unbind;
- uvc->func.get_alt = uvc_function_get_alt;
- uvc->func.set_alt = uvc_function_set_alt;
- uvc->func.disable = uvc_function_disable;
- uvc->func.setup = uvc_function_setup;
-
- ret = usb_add_function(c, &uvc->func);
- if (ret)
- kfree(uvc);
-
- return ret;
-
-error:
- kfree(uvc);
- return ret;
-}
-
-module_param_named(trace, uvc_gadget_trace_param, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(trace, "Trace level bitmask");
-
+++ /dev/null
-/*
- * f_uvc.h -- USB Video Class Gadget driver
- *
- * Copyright (C) 2009-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef _F_UVC_H_
-#define _F_UVC_H_
-
-#include <linux/usb/composite.h>
-#include <linux/usb/video.h>
-
-int uvc_bind_config(struct usb_configuration *c,
- const struct uvc_descriptor_header * const *fs_control,
- const struct uvc_descriptor_header * const *hs_control,
- const struct uvc_descriptor_header * const *fs_streaming,
- const struct uvc_descriptor_header * const *hs_streaming,
- const struct uvc_descriptor_header * const *ss_streaming);
-
-#endif /* _F_UVC_H_ */
-
--- /dev/null
+#
+# USB peripheral controller drivers
+#
+
+ccflags-y := -I$(PWD)/drivers/usb/gadget/
+ccflags-y += -I$(PWD)/drivers/usb/gadget/udc/
+
+# USB Functions
+usb_f_acm-y := f_acm.o
+obj-$(CONFIG_USB_F_ACM) += usb_f_acm.o
+usb_f_ss_lb-y := f_loopback.o f_sourcesink.o
+obj-$(CONFIG_USB_F_SS_LB) += usb_f_ss_lb.o
+obj-$(CONFIG_USB_U_SERIAL) += u_serial.o
+usb_f_serial-y := f_serial.o
+obj-$(CONFIG_USB_F_SERIAL) += usb_f_serial.o
+usb_f_obex-y := f_obex.o
+obj-$(CONFIG_USB_F_OBEX) += usb_f_obex.o
+obj-$(CONFIG_USB_U_ETHER) += u_ether.o
+usb_f_ncm-y := f_ncm.o
+obj-$(CONFIG_USB_F_NCM) += usb_f_ncm.o
+usb_f_ecm-y := f_ecm.o
+obj-$(CONFIG_USB_F_ECM) += usb_f_ecm.o
+usb_f_phonet-y := f_phonet.o
+obj-$(CONFIG_USB_F_PHONET) += usb_f_phonet.o
+usb_f_eem-y := f_eem.o
+obj-$(CONFIG_USB_F_EEM) += usb_f_eem.o
+usb_f_ecm_subset-y := f_subset.o
+obj-$(CONFIG_USB_F_SUBSET) += usb_f_ecm_subset.o
+usb_f_rndis-y := f_rndis.o rndis.o
+obj-$(CONFIG_USB_F_RNDIS) += usb_f_rndis.o
+usb_f_mass_storage-y := f_mass_storage.o storage_common.o
+obj-$(CONFIG_USB_F_MASS_STORAGE)+= usb_f_mass_storage.o
+usb_f_fs-y := f_fs.o
+obj-$(CONFIG_USB_F_FS) += usb_f_fs.o
--- /dev/null
+/*
+ * f_acm.c -- USB CDC serial (ACM) function driver
+ *
+ * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
+ * Copyright (C) 2008 by David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ * Copyright (C) 2009 by Samsung Electronics
+ * Author: Michal Nazarewicz (mina86@mina86.com)
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * either version 2 of that License or (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/err.h>
+
+#include "u_serial.h"
+#include "gadget_chips.h"
+
+
+/*
+ * This CDC ACM function support just wraps control functions and
+ * notifications around the generic serial-over-usb code.
+ *
+ * Because CDC ACM is standardized by the USB-IF, many host operating
+ * systems have drivers for it. Accordingly, ACM is the preferred
+ * interop solution for serial-port type connections. The control
+ * models are often not necessary, and in any case don't do much in
+ * this bare-bones implementation.
+ *
+ * Note that even MS-Windows has some support for ACM. However, that
+ * support is somewhat broken because when you use ACM in a composite
+ * device, having multiple interfaces confuses the poor OS. It doesn't
+ * seem to understand CDC Union descriptors. The new "association"
+ * descriptors (roughly equivalent to CDC Unions) may sometimes help.
+ */
+
+struct f_acm {
+ struct gserial port;
+ u8 ctrl_id, data_id;
+ u8 port_num;
+
+ u8 pending;
+
+ /* lock is mostly for pending and notify_req ... they get accessed
+ * by callbacks both from tty (open/close/break) under its spinlock,
+ * and notify_req.complete() which can't use that lock.
+ */
+ spinlock_t lock;
+
+ struct usb_ep *notify;
+ struct usb_request *notify_req;
+
+ struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
+
+ /* SetControlLineState request -- CDC 1.1 section 6.2.14 (INPUT) */
+ u16 port_handshake_bits;
+#define ACM_CTRL_RTS (1 << 1) /* unused with full duplex */
+#define ACM_CTRL_DTR (1 << 0) /* host is ready for data r/w */
+
+ /* SerialState notification -- CDC 1.1 section 6.3.5 (OUTPUT) */
+ u16 serial_state;
+#define ACM_CTRL_OVERRUN (1 << 6)
+#define ACM_CTRL_PARITY (1 << 5)
+#define ACM_CTRL_FRAMING (1 << 4)
+#define ACM_CTRL_RI (1 << 3)
+#define ACM_CTRL_BRK (1 << 2)
+#define ACM_CTRL_DSR (1 << 1)
+#define ACM_CTRL_DCD (1 << 0)
+};
+
+static inline struct f_acm *func_to_acm(struct usb_function *f)
+{
+ return container_of(f, struct f_acm, port.func);
+}
+
+static inline struct f_acm *port_to_acm(struct gserial *p)
+{
+ return container_of(p, struct f_acm, port);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* notification endpoint uses smallish and infrequent fixed-size messages */
+
+#define GS_NOTIFY_INTERVAL_MS 32
+#define GS_NOTIFY_MAXPACKET 10 /* notification + 2 bytes */
+
+/* interface and class descriptors: */
+
+static struct usb_interface_assoc_descriptor
+acm_iad_descriptor = {
+ .bLength = sizeof acm_iad_descriptor,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ /* .bFirstInterface = DYNAMIC, */
+ .bInterfaceCount = 2, // control + data
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
+ .bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
+ /* .iFunction = DYNAMIC */
+};
+
+
+static struct usb_interface_descriptor acm_control_interface_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
+ .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_interface_descriptor acm_data_interface_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_cdc_header_desc acm_header_desc = {
+ .bLength = sizeof(acm_header_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+ .bcdCDC = cpu_to_le16(0x0110),
+};
+
+static struct usb_cdc_call_mgmt_descriptor
+acm_call_mgmt_descriptor = {
+ .bLength = sizeof(acm_call_mgmt_descriptor),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
+ .bmCapabilities = 0,
+ /* .bDataInterface = DYNAMIC */
+};
+
+static struct usb_cdc_acm_descriptor acm_descriptor = {
+ .bLength = sizeof(acm_descriptor),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ACM_TYPE,
+ .bmCapabilities = USB_CDC_CAP_LINE,
+};
+
+static struct usb_cdc_union_desc acm_union_desc = {
+ .bLength = sizeof(acm_union_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+ /* .bMasterInterface0 = DYNAMIC */
+ /* .bSlaveInterface0 = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor acm_fs_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
+ .bInterval = GS_NOTIFY_INTERVAL_MS,
+};
+
+static struct usb_endpoint_descriptor acm_fs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor acm_fs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *acm_fs_function[] = {
+ (struct usb_descriptor_header *) &acm_iad_descriptor,
+ (struct usb_descriptor_header *) &acm_control_interface_desc,
+ (struct usb_descriptor_header *) &acm_header_desc,
+ (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
+ (struct usb_descriptor_header *) &acm_descriptor,
+ (struct usb_descriptor_header *) &acm_union_desc,
+ (struct usb_descriptor_header *) &acm_fs_notify_desc,
+ (struct usb_descriptor_header *) &acm_data_interface_desc,
+ (struct usb_descriptor_header *) &acm_fs_in_desc,
+ (struct usb_descriptor_header *) &acm_fs_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+static struct usb_endpoint_descriptor acm_hs_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
+ .bInterval = USB_MS_TO_HS_INTERVAL(GS_NOTIFY_INTERVAL_MS),
+};
+
+static struct usb_endpoint_descriptor acm_hs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor acm_hs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *acm_hs_function[] = {
+ (struct usb_descriptor_header *) &acm_iad_descriptor,
+ (struct usb_descriptor_header *) &acm_control_interface_desc,
+ (struct usb_descriptor_header *) &acm_header_desc,
+ (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
+ (struct usb_descriptor_header *) &acm_descriptor,
+ (struct usb_descriptor_header *) &acm_union_desc,
+ (struct usb_descriptor_header *) &acm_hs_notify_desc,
+ (struct usb_descriptor_header *) &acm_data_interface_desc,
+ (struct usb_descriptor_header *) &acm_hs_in_desc,
+ (struct usb_descriptor_header *) &acm_hs_out_desc,
+ NULL,
+};
+
+static struct usb_endpoint_descriptor acm_ss_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor acm_ss_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor acm_ss_bulk_comp_desc = {
+ .bLength = sizeof acm_ss_bulk_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+};
+
+static struct usb_descriptor_header *acm_ss_function[] = {
+ (struct usb_descriptor_header *) &acm_iad_descriptor,
+ (struct usb_descriptor_header *) &acm_control_interface_desc,
+ (struct usb_descriptor_header *) &acm_header_desc,
+ (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
+ (struct usb_descriptor_header *) &acm_descriptor,
+ (struct usb_descriptor_header *) &acm_union_desc,
+ (struct usb_descriptor_header *) &acm_hs_notify_desc,
+ (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
+ (struct usb_descriptor_header *) &acm_data_interface_desc,
+ (struct usb_descriptor_header *) &acm_ss_in_desc,
+ (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
+ (struct usb_descriptor_header *) &acm_ss_out_desc,
+ (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+#define ACM_CTRL_IDX 0
+#define ACM_DATA_IDX 1
+#define ACM_IAD_IDX 2
+
+/* static strings, in UTF-8 */
+static struct usb_string acm_string_defs[] = {
+ [ACM_CTRL_IDX].s = "CDC Abstract Control Model (ACM)",
+ [ACM_DATA_IDX].s = "CDC ACM Data",
+ [ACM_IAD_IDX ].s = "CDC Serial",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings acm_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = acm_string_defs,
+};
+
+static struct usb_gadget_strings *acm_strings[] = {
+ &acm_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* ACM control ... data handling is delegated to tty library code.
+ * The main task of this function is to activate and deactivate
+ * that code based on device state; track parameters like line
+ * speed, handshake state, and so on; and issue notifications.
+ */
+
+static void acm_complete_set_line_coding(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ struct f_acm *acm = ep->driver_data;
+ struct usb_composite_dev *cdev = acm->port.func.config->cdev;
+
+ if (req->status != 0) {
+ DBG(cdev, "acm ttyGS%d completion, err %d\n",
+ acm->port_num, req->status);
+ return;
+ }
+
+ /* normal completion */
+ if (req->actual != sizeof(acm->port_line_coding)) {
+ DBG(cdev, "acm ttyGS%d short resp, len %d\n",
+ acm->port_num, req->actual);
+ usb_ep_set_halt(ep);
+ } else {
+ struct usb_cdc_line_coding *value = req->buf;
+
+ /* REVISIT: we currently just remember this data.
+ * If we change that, (a) validate it first, then
+ * (b) update whatever hardware needs updating,
+ * (c) worry about locking. This is information on
+ * the order of 9600-8-N-1 ... most of which means
+ * nothing unless we control a real RS232 line.
+ */
+ acm->port_line_coding = *value;
+ }
+}
+
+static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct f_acm *acm = func_to_acm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ /* composite driver infrastructure handles everything except
+ * CDC class messages; interface activation uses set_alt().
+ *
+ * Note CDC spec table 4 lists the ACM request profile. It requires
+ * encapsulated command support ... we don't handle any, and respond
+ * to them by stalling. Options include get/set/clear comm features
+ * (not that useful) and SEND_BREAK.
+ */
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
+
+ /* SET_LINE_CODING ... just read and save what the host sends */
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_REQ_SET_LINE_CODING:
+ if (w_length != sizeof(struct usb_cdc_line_coding)
+ || w_index != acm->ctrl_id)
+ goto invalid;
+
+ value = w_length;
+ cdev->gadget->ep0->driver_data = acm;
+ req->complete = acm_complete_set_line_coding;
+ break;
+
+ /* GET_LINE_CODING ... return what host sent, or initial value */
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_REQ_GET_LINE_CODING:
+ if (w_index != acm->ctrl_id)
+ goto invalid;
+
+ value = min_t(unsigned, w_length,
+ sizeof(struct usb_cdc_line_coding));
+ memcpy(req->buf, &acm->port_line_coding, value);
+ break;
+
+ /* SET_CONTROL_LINE_STATE ... save what the host sent */
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_REQ_SET_CONTROL_LINE_STATE:
+ if (w_index != acm->ctrl_id)
+ goto invalid;
+
+ value = 0;
+
+ /* FIXME we should not allow data to flow until the
+ * host sets the ACM_CTRL_DTR bit; and when it clears
+ * that bit, we should return to that no-flow state.
+ */
+ acm->port_handshake_bits = w_value;
+ break;
+
+ default:
+invalid:
+ VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ }
+
+ /* respond with data transfer or status phase? */
+ if (value >= 0) {
+ DBG(cdev, "acm ttyGS%d req%02x.%02x v%04x i%04x l%d\n",
+ acm->port_num, ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = 0;
+ req->length = value;
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0)
+ ERROR(cdev, "acm response on ttyGS%d, err %d\n",
+ acm->port_num, value);
+ }
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_acm *acm = func_to_acm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ /* we know alt == 0, so this is an activation or a reset */
+
+ if (intf == acm->ctrl_id) {
+ if (acm->notify->driver_data) {
+ VDBG(cdev, "reset acm control interface %d\n", intf);
+ usb_ep_disable(acm->notify);
+ } else {
+ VDBG(cdev, "init acm ctrl interface %d\n", intf);
+ if (config_ep_by_speed(cdev->gadget, f, acm->notify))
+ return -EINVAL;
+ }
+ usb_ep_enable(acm->notify);
+ acm->notify->driver_data = acm;
+
+ } else if (intf == acm->data_id) {
+ if (acm->port.in->driver_data) {
+ DBG(cdev, "reset acm ttyGS%d\n", acm->port_num);
+ gserial_disconnect(&acm->port);
+ }
+ if (!acm->port.in->desc || !acm->port.out->desc) {
+ DBG(cdev, "activate acm ttyGS%d\n", acm->port_num);
+ if (config_ep_by_speed(cdev->gadget, f,
+ acm->port.in) ||
+ config_ep_by_speed(cdev->gadget, f,
+ acm->port.out)) {
+ acm->port.in->desc = NULL;
+ acm->port.out->desc = NULL;
+ return -EINVAL;
+ }
+ }
+ gserial_connect(&acm->port, acm->port_num);
+
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+static void acm_disable(struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "acm ttyGS%d deactivated\n", acm->port_num);
+ gserial_disconnect(&acm->port);
+ usb_ep_disable(acm->notify);
+ acm->notify->driver_data = NULL;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/**
+ * acm_cdc_notify - issue CDC notification to host
+ * @acm: wraps host to be notified
+ * @type: notification type
+ * @value: Refer to cdc specs, wValue field.
+ * @data: data to be sent
+ * @length: size of data
+ * Context: irqs blocked, acm->lock held, acm_notify_req non-null
+ *
+ * Returns zero on success or a negative errno.
+ *
+ * See section 6.3.5 of the CDC 1.1 specification for information
+ * about the only notification we issue: SerialState change.
+ */
+static int acm_cdc_notify(struct f_acm *acm, u8 type, u16 value,
+ void *data, unsigned length)
+{
+ struct usb_ep *ep = acm->notify;
+ struct usb_request *req;
+ struct usb_cdc_notification *notify;
+ const unsigned len = sizeof(*notify) + length;
+ void *buf;
+ int status;
+
+ req = acm->notify_req;
+ acm->notify_req = NULL;
+ acm->pending = false;
+
+ req->length = len;
+ notify = req->buf;
+ buf = notify + 1;
+
+ notify->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS
+ | USB_RECIP_INTERFACE;
+ notify->bNotificationType = type;
+ notify->wValue = cpu_to_le16(value);
+ notify->wIndex = cpu_to_le16(acm->ctrl_id);
+ notify->wLength = cpu_to_le16(length);
+ memcpy(buf, data, length);
+
+ /* ep_queue() can complete immediately if it fills the fifo... */
+ spin_unlock(&acm->lock);
+ status = usb_ep_queue(ep, req, GFP_ATOMIC);
+ spin_lock(&acm->lock);
+
+ if (status < 0) {
+ ERROR(acm->port.func.config->cdev,
+ "acm ttyGS%d can't notify serial state, %d\n",
+ acm->port_num, status);
+ acm->notify_req = req;
+ }
+
+ return status;
+}
+
+static int acm_notify_serial_state(struct f_acm *acm)
+{
+ struct usb_composite_dev *cdev = acm->port.func.config->cdev;
+ int status;
+
+ spin_lock(&acm->lock);
+ if (acm->notify_req) {
+ DBG(cdev, "acm ttyGS%d serial state %04x\n",
+ acm->port_num, acm->serial_state);
+ status = acm_cdc_notify(acm, USB_CDC_NOTIFY_SERIAL_STATE,
+ 0, &acm->serial_state, sizeof(acm->serial_state));
+ } else {
+ acm->pending = true;
+ status = 0;
+ }
+ spin_unlock(&acm->lock);
+ return status;
+}
+
+static void acm_cdc_notify_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_acm *acm = req->context;
+ u8 doit = false;
+
+ /* on this call path we do NOT hold the port spinlock,
+ * which is why ACM needs its own spinlock
+ */
+ spin_lock(&acm->lock);
+ if (req->status != -ESHUTDOWN)
+ doit = acm->pending;
+ acm->notify_req = req;
+ spin_unlock(&acm->lock);
+
+ if (doit)
+ acm_notify_serial_state(acm);
+}
+
+/* connect == the TTY link is open */
+
+static void acm_connect(struct gserial *port)
+{
+ struct f_acm *acm = port_to_acm(port);
+
+ acm->serial_state |= ACM_CTRL_DSR | ACM_CTRL_DCD;
+ acm_notify_serial_state(acm);
+}
+
+static void acm_disconnect(struct gserial *port)
+{
+ struct f_acm *acm = port_to_acm(port);
+
+ acm->serial_state &= ~(ACM_CTRL_DSR | ACM_CTRL_DCD);
+ acm_notify_serial_state(acm);
+}
+
+static int acm_send_break(struct gserial *port, int duration)
+{
+ struct f_acm *acm = port_to_acm(port);
+ u16 state;
+
+ state = acm->serial_state;
+ state &= ~ACM_CTRL_BRK;
+ if (duration)
+ state |= ACM_CTRL_BRK;
+
+ acm->serial_state = state;
+ return acm_notify_serial_state(acm);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* ACM function driver setup/binding */
+static int
+acm_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_acm *acm = func_to_acm(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+
+ /* REVISIT might want instance-specific strings to help
+ * distinguish instances ...
+ */
+
+ /* maybe allocate device-global string IDs, and patch descriptors */
+ us = usb_gstrings_attach(cdev, acm_strings,
+ ARRAY_SIZE(acm_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+ acm_control_interface_desc.iInterface = us[ACM_CTRL_IDX].id;
+ acm_data_interface_desc.iInterface = us[ACM_DATA_IDX].id;
+ acm_iad_descriptor.iFunction = us[ACM_IAD_IDX].id;
+
+ /* allocate instance-specific interface IDs, and patch descriptors */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ acm->ctrl_id = status;
+ acm_iad_descriptor.bFirstInterface = status;
+
+ acm_control_interface_desc.bInterfaceNumber = status;
+ acm_union_desc .bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ acm->data_id = status;
+
+ acm_data_interface_desc.bInterfaceNumber = status;
+ acm_union_desc.bSlaveInterface0 = status;
+ acm_call_mgmt_descriptor.bDataInterface = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_in_desc);
+ if (!ep)
+ goto fail;
+ acm->port.in = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_out_desc);
+ if (!ep)
+ goto fail;
+ acm->port.out = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_notify_desc);
+ if (!ep)
+ goto fail;
+ acm->notify = ep;
+ ep->driver_data = cdev; /* claim */
+
+ /* allocate notification */
+ acm->notify_req = gs_alloc_req(ep,
+ sizeof(struct usb_cdc_notification) + 2,
+ GFP_KERNEL);
+ if (!acm->notify_req)
+ goto fail;
+
+ acm->notify_req->complete = acm_cdc_notify_complete;
+ acm->notify_req->context = acm;
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ acm_hs_in_desc.bEndpointAddress = acm_fs_in_desc.bEndpointAddress;
+ acm_hs_out_desc.bEndpointAddress = acm_fs_out_desc.bEndpointAddress;
+ acm_hs_notify_desc.bEndpointAddress =
+ acm_fs_notify_desc.bEndpointAddress;
+
+ acm_ss_in_desc.bEndpointAddress = acm_fs_in_desc.bEndpointAddress;
+ acm_ss_out_desc.bEndpointAddress = acm_fs_out_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, acm_fs_function, acm_hs_function,
+ acm_ss_function);
+ if (status)
+ goto fail;
+
+ DBG(cdev, "acm ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",
+ acm->port_num,
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ acm->port.in->name, acm->port.out->name,
+ acm->notify->name);
+ return 0;
+
+fail:
+ if (acm->notify_req)
+ gs_free_req(acm->notify, acm->notify_req);
+
+ /* we might as well release our claims on endpoints */
+ if (acm->notify)
+ acm->notify->driver_data = NULL;
+ if (acm->port.out)
+ acm->port.out->driver_data = NULL;
+ if (acm->port.in)
+ acm->port.in->driver_data = NULL;
+
+ ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
+
+ return status;
+}
+
+static void acm_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+
+ acm_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+ if (acm->notify_req)
+ gs_free_req(acm->notify, acm->notify_req);
+}
+
+static void acm_free_func(struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+
+ kfree(acm);
+}
+
+static struct usb_function *acm_alloc_func(struct usb_function_instance *fi)
+{
+ struct f_serial_opts *opts;
+ struct f_acm *acm;
+
+ acm = kzalloc(sizeof(*acm), GFP_KERNEL);
+ if (!acm)
+ return ERR_PTR(-ENOMEM);
+
+ spin_lock_init(&acm->lock);
+
+ acm->port.connect = acm_connect;
+ acm->port.disconnect = acm_disconnect;
+ acm->port.send_break = acm_send_break;
+
+ acm->port.func.name = "acm";
+ acm->port.func.strings = acm_strings;
+ /* descriptors are per-instance copies */
+ acm->port.func.bind = acm_bind;
+ acm->port.func.set_alt = acm_set_alt;
+ acm->port.func.setup = acm_setup;
+ acm->port.func.disable = acm_disable;
+
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+ acm->port_num = opts->port_num;
+ acm->port.func.unbind = acm_unbind;
+ acm->port.func.free_func = acm_free_func;
+
+ return &acm->port.func;
+}
+
+static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_serial_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(f_serial_opts);
+static ssize_t f_acm_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+ struct f_serial_opts_attribute *f_serial_opts_attr =
+ container_of(attr, struct f_serial_opts_attribute, attr);
+ ssize_t ret = 0;
+
+ if (f_serial_opts_attr->show)
+ ret = f_serial_opts_attr->show(opts, page);
+ return ret;
+}
+
+static void acm_attr_release(struct config_item *item)
+{
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations acm_item_ops = {
+ .release = acm_attr_release,
+ .show_attribute = f_acm_attr_show,
+};
+
+static ssize_t f_acm_port_num_show(struct f_serial_opts *opts, char *page)
+{
+ return sprintf(page, "%u\n", opts->port_num);
+}
+
+static struct f_serial_opts_attribute f_acm_port_num =
+ __CONFIGFS_ATTR_RO(port_num, f_acm_port_num_show);
+
+
+static struct configfs_attribute *acm_attrs[] = {
+ &f_acm_port_num.attr,
+ NULL,
+};
+
+static struct config_item_type acm_func_type = {
+ .ct_item_ops = &acm_item_ops,
+ .ct_attrs = acm_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void acm_free_instance(struct usb_function_instance *fi)
+{
+ struct f_serial_opts *opts;
+
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+ gserial_free_line(opts->port_num);
+ kfree(opts);
+}
+
+static struct usb_function_instance *acm_alloc_instance(void)
+{
+ struct f_serial_opts *opts;
+ int ret;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ opts->func_inst.free_func_inst = acm_free_instance;
+ ret = gserial_alloc_line(&opts->port_num);
+ if (ret) {
+ kfree(opts);
+ return ERR_PTR(ret);
+ }
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &acm_func_type);
+ return &opts->func_inst;
+}
+DECLARE_USB_FUNCTION_INIT(acm, acm_alloc_instance, acm_alloc_func);
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * f_ecm.c -- USB CDC Ethernet (ECM) link function driver
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+
+#include "u_ether.h"
+#include "u_ether_configfs.h"
+#include "u_ecm.h"
+
+
+/*
+ * This function is a "CDC Ethernet Networking Control Model" (CDC ECM)
+ * Ethernet link. The data transfer model is simple (packets sent and
+ * received over bulk endpoints using normal short packet termination),
+ * and the control model exposes various data and optional notifications.
+ *
+ * ECM is well standardized and (except for Microsoft) supported by most
+ * operating systems with USB host support. It's the preferred interop
+ * solution for Ethernet over USB, at least for firmware based solutions.
+ * (Hardware solutions tend to be more minimalist.) A newer and simpler
+ * "Ethernet Emulation Model" (CDC EEM) hasn't yet caught on.
+ *
+ * Note that ECM requires the use of "alternate settings" for its data
+ * interface. This means that the set_alt() method has real work to do,
+ * and also means that a get_alt() method is required.
+ */
+
+
+enum ecm_notify_state {
+ ECM_NOTIFY_NONE, /* don't notify */
+ ECM_NOTIFY_CONNECT, /* issue CONNECT next */
+ ECM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */
+};
+
+struct f_ecm {
+ struct gether port;
+ u8 ctrl_id, data_id;
+
+ char ethaddr[14];
+
+ struct usb_ep *notify;
+ struct usb_request *notify_req;
+ u8 notify_state;
+ bool is_open;
+
+ /* FIXME is_open needs some irq-ish locking
+ * ... possibly the same as port.ioport
+ */
+};
+
+static inline struct f_ecm *func_to_ecm(struct usb_function *f)
+{
+ return container_of(f, struct f_ecm, port.func);
+}
+
+/* peak (theoretical) bulk transfer rate in bits-per-second */
+static inline unsigned ecm_bitrate(struct usb_gadget *g)
+{
+ if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
+ return 13 * 1024 * 8 * 1000 * 8;
+ else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+ return 13 * 512 * 8 * 1000 * 8;
+ else
+ return 19 * 64 * 1 * 1000 * 8;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Include the status endpoint if we can, even though it's optional.
+ *
+ * Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
+ * packet, to simplify cancellation; and a big transfer interval, to
+ * waste less bandwidth.
+ *
+ * Some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
+ * if they ignore the connect/disconnect notifications that real aether
+ * can provide. More advanced cdc configurations might want to support
+ * encapsulated commands (vendor-specific, using control-OUT).
+ */
+
+#define ECM_STATUS_INTERVAL_MS 32
+#define ECM_STATUS_BYTECOUNT 16 /* 8 byte header + data */
+
+
+/* interface descriptor: */
+
+static struct usb_interface_assoc_descriptor
+ecm_iad_descriptor = {
+ .bLength = sizeof ecm_iad_descriptor,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ /* .bFirstInterface = DYNAMIC, */
+ .bInterfaceCount = 2, /* control + data */
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
+ .bFunctionProtocol = USB_CDC_PROTO_NONE,
+ /* .iFunction = DYNAMIC */
+};
+
+
+static struct usb_interface_descriptor ecm_control_intf = {
+ .bLength = sizeof ecm_control_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC */
+ /* status endpoint is optional; this could be patched later */
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
+ .bInterfaceProtocol = USB_CDC_PROTO_NONE,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_cdc_header_desc ecm_header_desc = {
+ .bLength = sizeof ecm_header_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+
+ .bcdCDC = cpu_to_le16(0x0110),
+};
+
+static struct usb_cdc_union_desc ecm_union_desc = {
+ .bLength = sizeof(ecm_union_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+ /* .bMasterInterface0 = DYNAMIC */
+ /* .bSlaveInterface0 = DYNAMIC */
+};
+
+static struct usb_cdc_ether_desc ecm_desc = {
+ .bLength = sizeof ecm_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
+
+ /* this descriptor actually adds value, surprise! */
+ /* .iMACAddress = DYNAMIC */
+ .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
+ .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
+ .wNumberMCFilters = cpu_to_le16(0),
+ .bNumberPowerFilters = 0,
+};
+
+/* the default data interface has no endpoints ... */
+
+static struct usb_interface_descriptor ecm_data_nop_intf = {
+ .bLength = sizeof ecm_data_nop_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ /* .iInterface = DYNAMIC */
+};
+
+/* ... but the "real" data interface has two bulk endpoints */
+
+static struct usb_interface_descriptor ecm_data_intf = {
+ .bLength = sizeof ecm_data_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_ecm_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT),
+ .bInterval = ECM_STATUS_INTERVAL_MS,
+};
+
+static struct usb_endpoint_descriptor fs_ecm_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_ecm_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *ecm_fs_function[] = {
+ /* CDC ECM control descriptors */
+ (struct usb_descriptor_header *) &ecm_iad_descriptor,
+ (struct usb_descriptor_header *) &ecm_control_intf,
+ (struct usb_descriptor_header *) &ecm_header_desc,
+ (struct usb_descriptor_header *) &ecm_union_desc,
+ (struct usb_descriptor_header *) &ecm_desc,
+
+ /* NOTE: status endpoint might need to be removed */
+ (struct usb_descriptor_header *) &fs_ecm_notify_desc,
+
+ /* data interface, altsettings 0 and 1 */
+ (struct usb_descriptor_header *) &ecm_data_nop_intf,
+ (struct usb_descriptor_header *) &ecm_data_intf,
+ (struct usb_descriptor_header *) &fs_ecm_in_desc,
+ (struct usb_descriptor_header *) &fs_ecm_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_ecm_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT),
+ .bInterval = USB_MS_TO_HS_INTERVAL(ECM_STATUS_INTERVAL_MS),
+};
+
+static struct usb_endpoint_descriptor hs_ecm_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_ecm_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *ecm_hs_function[] = {
+ /* CDC ECM control descriptors */
+ (struct usb_descriptor_header *) &ecm_iad_descriptor,
+ (struct usb_descriptor_header *) &ecm_control_intf,
+ (struct usb_descriptor_header *) &ecm_header_desc,
+ (struct usb_descriptor_header *) &ecm_union_desc,
+ (struct usb_descriptor_header *) &ecm_desc,
+
+ /* NOTE: status endpoint might need to be removed */
+ (struct usb_descriptor_header *) &hs_ecm_notify_desc,
+
+ /* data interface, altsettings 0 and 1 */
+ (struct usb_descriptor_header *) &ecm_data_nop_intf,
+ (struct usb_descriptor_header *) &ecm_data_intf,
+ (struct usb_descriptor_header *) &hs_ecm_in_desc,
+ (struct usb_descriptor_header *) &hs_ecm_out_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_ecm_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT),
+ .bInterval = USB_MS_TO_HS_INTERVAL(ECM_STATUS_INTERVAL_MS),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_ecm_intr_comp_desc = {
+ .bLength = sizeof ss_ecm_intr_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 3 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+ .wBytesPerInterval = cpu_to_le16(ECM_STATUS_BYTECOUNT),
+};
+
+static struct usb_endpoint_descriptor ss_ecm_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor ss_ecm_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_ecm_bulk_comp_desc = {
+ .bLength = sizeof ss_ecm_bulk_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 2 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
+static struct usb_descriptor_header *ecm_ss_function[] = {
+ /* CDC ECM control descriptors */
+ (struct usb_descriptor_header *) &ecm_iad_descriptor,
+ (struct usb_descriptor_header *) &ecm_control_intf,
+ (struct usb_descriptor_header *) &ecm_header_desc,
+ (struct usb_descriptor_header *) &ecm_union_desc,
+ (struct usb_descriptor_header *) &ecm_desc,
+
+ /* NOTE: status endpoint might need to be removed */
+ (struct usb_descriptor_header *) &ss_ecm_notify_desc,
+ (struct usb_descriptor_header *) &ss_ecm_intr_comp_desc,
+
+ /* data interface, altsettings 0 and 1 */
+ (struct usb_descriptor_header *) &ecm_data_nop_intf,
+ (struct usb_descriptor_header *) &ecm_data_intf,
+ (struct usb_descriptor_header *) &ss_ecm_in_desc,
+ (struct usb_descriptor_header *) &ss_ecm_bulk_comp_desc,
+ (struct usb_descriptor_header *) &ss_ecm_out_desc,
+ (struct usb_descriptor_header *) &ss_ecm_bulk_comp_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+static struct usb_string ecm_string_defs[] = {
+ [0].s = "CDC Ethernet Control Model (ECM)",
+ [1].s = "",
+ [2].s = "CDC Ethernet Data",
+ [3].s = "CDC ECM",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings ecm_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = ecm_string_defs,
+};
+
+static struct usb_gadget_strings *ecm_strings[] = {
+ &ecm_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static void ecm_do_notify(struct f_ecm *ecm)
+{
+ struct usb_request *req = ecm->notify_req;
+ struct usb_cdc_notification *event;
+ struct usb_composite_dev *cdev = ecm->port.func.config->cdev;
+ __le32 *data;
+ int status;
+
+ /* notification already in flight? */
+ if (!req)
+ return;
+
+ event = req->buf;
+ switch (ecm->notify_state) {
+ case ECM_NOTIFY_NONE:
+ return;
+
+ case ECM_NOTIFY_CONNECT:
+ event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
+ if (ecm->is_open)
+ event->wValue = cpu_to_le16(1);
+ else
+ event->wValue = cpu_to_le16(0);
+ event->wLength = 0;
+ req->length = sizeof *event;
+
+ DBG(cdev, "notify connect %s\n",
+ ecm->is_open ? "true" : "false");
+ ecm->notify_state = ECM_NOTIFY_SPEED;
+ break;
+
+ case ECM_NOTIFY_SPEED:
+ event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
+ event->wValue = cpu_to_le16(0);
+ event->wLength = cpu_to_le16(8);
+ req->length = ECM_STATUS_BYTECOUNT;
+
+ /* SPEED_CHANGE data is up/down speeds in bits/sec */
+ data = req->buf + sizeof *event;
+ data[0] = cpu_to_le32(ecm_bitrate(cdev->gadget));
+ data[1] = data[0];
+
+ DBG(cdev, "notify speed %d\n", ecm_bitrate(cdev->gadget));
+ ecm->notify_state = ECM_NOTIFY_NONE;
+ break;
+ }
+ event->bmRequestType = 0xA1;
+ event->wIndex = cpu_to_le16(ecm->ctrl_id);
+
+ ecm->notify_req = NULL;
+ status = usb_ep_queue(ecm->notify, req, GFP_ATOMIC);
+ if (status < 0) {
+ ecm->notify_req = req;
+ DBG(cdev, "notify --> %d\n", status);
+ }
+}
+
+static void ecm_notify(struct f_ecm *ecm)
+{
+ /* NOTE on most versions of Linux, host side cdc-ethernet
+ * won't listen for notifications until its netdevice opens.
+ * The first notification then sits in the FIFO for a long
+ * time, and the second one is queued.
+ */
+ ecm->notify_state = ECM_NOTIFY_CONNECT;
+ ecm_do_notify(ecm);
+}
+
+static void ecm_notify_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_ecm *ecm = req->context;
+ struct usb_composite_dev *cdev = ecm->port.func.config->cdev;
+ struct usb_cdc_notification *event = req->buf;
+
+ switch (req->status) {
+ case 0:
+ /* no fault */
+ break;
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ ecm->notify_state = ECM_NOTIFY_NONE;
+ break;
+ default:
+ DBG(cdev, "event %02x --> %d\n",
+ event->bNotificationType, req->status);
+ break;
+ }
+ ecm->notify_req = req;
+ ecm_do_notify(ecm);
+}
+
+static int ecm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct f_ecm *ecm = func_to_ecm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ /* composite driver infrastructure handles everything except
+ * CDC class messages; interface activation uses set_alt().
+ */
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SET_ETHERNET_PACKET_FILTER:
+ /* see 6.2.30: no data, wIndex = interface,
+ * wValue = packet filter bitmap
+ */
+ if (w_length != 0 || w_index != ecm->ctrl_id)
+ goto invalid;
+ DBG(cdev, "packet filter %02x\n", w_value);
+ /* REVISIT locking of cdc_filter. This assumes the UDC
+ * driver won't have a concurrent packet TX irq running on
+ * another CPU; or that if it does, this write is atomic...
+ */
+ ecm->port.cdc_filter = w_value;
+ value = 0;
+ break;
+
+ /* and optionally:
+ * case USB_CDC_SEND_ENCAPSULATED_COMMAND:
+ * case USB_CDC_GET_ENCAPSULATED_RESPONSE:
+ * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
+ * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
+ * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
+ * case USB_CDC_GET_ETHERNET_STATISTIC:
+ */
+
+ default:
+invalid:
+ DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ }
+
+ /* respond with data transfer or status phase? */
+ if (value >= 0) {
+ DBG(cdev, "ecm req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = 0;
+ req->length = value;
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0)
+ ERROR(cdev, "ecm req %02x.%02x response err %d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ value);
+ }
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+
+static int ecm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_ecm *ecm = func_to_ecm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ /* Control interface has only altsetting 0 */
+ if (intf == ecm->ctrl_id) {
+ if (alt != 0)
+ goto fail;
+
+ if (ecm->notify->driver_data) {
+ VDBG(cdev, "reset ecm control %d\n", intf);
+ usb_ep_disable(ecm->notify);
+ }
+ if (!(ecm->notify->desc)) {
+ VDBG(cdev, "init ecm ctrl %d\n", intf);
+ if (config_ep_by_speed(cdev->gadget, f, ecm->notify))
+ goto fail;
+ }
+ usb_ep_enable(ecm->notify);
+ ecm->notify->driver_data = ecm;
+
+ /* Data interface has two altsettings, 0 and 1 */
+ } else if (intf == ecm->data_id) {
+ if (alt > 1)
+ goto fail;
+
+ if (ecm->port.in_ep->driver_data) {
+ DBG(cdev, "reset ecm\n");
+ gether_disconnect(&ecm->port);
+ }
+
+ if (!ecm->port.in_ep->desc ||
+ !ecm->port.out_ep->desc) {
+ DBG(cdev, "init ecm\n");
+ if (config_ep_by_speed(cdev->gadget, f,
+ ecm->port.in_ep) ||
+ config_ep_by_speed(cdev->gadget, f,
+ ecm->port.out_ep)) {
+ ecm->port.in_ep->desc = NULL;
+ ecm->port.out_ep->desc = NULL;
+ goto fail;
+ }
+ }
+
+ /* CDC Ethernet only sends data in non-default altsettings.
+ * Changing altsettings resets filters, statistics, etc.
+ */
+ if (alt == 1) {
+ struct net_device *net;
+
+ /* Enable zlps by default for ECM conformance;
+ * override for musb_hdrc (avoids txdma ovhead).
+ */
+ ecm->port.is_zlp_ok = !(gadget_is_musbhdrc(cdev->gadget)
+ );
+ ecm->port.cdc_filter = DEFAULT_FILTER;
+ DBG(cdev, "activate ecm\n");
+ net = gether_connect(&ecm->port);
+ if (IS_ERR(net))
+ return PTR_ERR(net);
+ }
+
+ /* NOTE this can be a minor disagreement with the ECM spec,
+ * which says speed notifications will "always" follow
+ * connection notifications. But we allow one connect to
+ * follow another (if the first is in flight), and instead
+ * just guarantee that a speed notification is always sent.
+ */
+ ecm_notify(ecm);
+ } else
+ goto fail;
+
+ return 0;
+fail:
+ return -EINVAL;
+}
+
+/* Because the data interface supports multiple altsettings,
+ * this ECM function *MUST* implement a get_alt() method.
+ */
+static int ecm_get_alt(struct usb_function *f, unsigned intf)
+{
+ struct f_ecm *ecm = func_to_ecm(f);
+
+ if (intf == ecm->ctrl_id)
+ return 0;
+ return ecm->port.in_ep->driver_data ? 1 : 0;
+}
+
+static void ecm_disable(struct usb_function *f)
+{
+ struct f_ecm *ecm = func_to_ecm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "ecm deactivated\n");
+
+ if (ecm->port.in_ep->driver_data)
+ gether_disconnect(&ecm->port);
+
+ if (ecm->notify->driver_data) {
+ usb_ep_disable(ecm->notify);
+ ecm->notify->driver_data = NULL;
+ ecm->notify->desc = NULL;
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Callbacks let us notify the host about connect/disconnect when the
+ * net device is opened or closed.
+ *
+ * For testing, note that link states on this side include both opened
+ * and closed variants of:
+ *
+ * - disconnected/unconfigured
+ * - configured but inactive (data alt 0)
+ * - configured and active (data alt 1)
+ *
+ * Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and
+ * SET_INTERFACE (altsetting). Remember also that "configured" doesn't
+ * imply the host is actually polling the notification endpoint, and
+ * likewise that "active" doesn't imply it's actually using the data
+ * endpoints for traffic.
+ */
+
+static void ecm_open(struct gether *geth)
+{
+ struct f_ecm *ecm = func_to_ecm(&geth->func);
+
+ DBG(ecm->port.func.config->cdev, "%s\n", __func__);
+
+ ecm->is_open = true;
+ ecm_notify(ecm);
+}
+
+static void ecm_close(struct gether *geth)
+{
+ struct f_ecm *ecm = func_to_ecm(&geth->func);
+
+ DBG(ecm->port.func.config->cdev, "%s\n", __func__);
+
+ ecm->is_open = false;
+ ecm_notify(ecm);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* ethernet function driver setup/binding */
+
+static int
+ecm_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_ecm *ecm = func_to_ecm(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+
+ struct f_ecm_opts *ecm_opts;
+
+ if (!can_support_ecm(cdev->gadget))
+ return -EINVAL;
+
+ ecm_opts = container_of(f->fi, struct f_ecm_opts, func_inst);
+
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to ecm_opts->bound access
+ */
+ if (!ecm_opts->bound) {
+ mutex_lock(&ecm_opts->lock);
+ gether_set_gadget(ecm_opts->net, cdev->gadget);
+ status = gether_register_netdev(ecm_opts->net);
+ mutex_unlock(&ecm_opts->lock);
+ if (status)
+ return status;
+ ecm_opts->bound = true;
+ }
+
+ us = usb_gstrings_attach(cdev, ecm_strings,
+ ARRAY_SIZE(ecm_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+ ecm_control_intf.iInterface = us[0].id;
+ ecm_data_intf.iInterface = us[2].id;
+ ecm_desc.iMACAddress = us[1].id;
+ ecm_iad_descriptor.iFunction = us[3].id;
+
+ /* allocate instance-specific interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ecm->ctrl_id = status;
+ ecm_iad_descriptor.bFirstInterface = status;
+
+ ecm_control_intf.bInterfaceNumber = status;
+ ecm_union_desc.bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ecm->data_id = status;
+
+ ecm_data_nop_intf.bInterfaceNumber = status;
+ ecm_data_intf.bInterfaceNumber = status;
+ ecm_union_desc.bSlaveInterface0 = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_ecm_in_desc);
+ if (!ep)
+ goto fail;
+ ecm->port.in_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_ecm_out_desc);
+ if (!ep)
+ goto fail;
+ ecm->port.out_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ /* NOTE: a status/notification endpoint is *OPTIONAL* but we
+ * don't treat it that way. It's simpler, and some newer CDC
+ * profiles (wireless handsets) no longer treat it as optional.
+ */
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_ecm_notify_desc);
+ if (!ep)
+ goto fail;
+ ecm->notify = ep;
+ ep->driver_data = cdev; /* claim */
+
+ status = -ENOMEM;
+
+ /* allocate notification request and buffer */
+ ecm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
+ if (!ecm->notify_req)
+ goto fail;
+ ecm->notify_req->buf = kmalloc(ECM_STATUS_BYTECOUNT, GFP_KERNEL);
+ if (!ecm->notify_req->buf)
+ goto fail;
+ ecm->notify_req->context = ecm;
+ ecm->notify_req->complete = ecm_notify_complete;
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ hs_ecm_in_desc.bEndpointAddress = fs_ecm_in_desc.bEndpointAddress;
+ hs_ecm_out_desc.bEndpointAddress = fs_ecm_out_desc.bEndpointAddress;
+ hs_ecm_notify_desc.bEndpointAddress =
+ fs_ecm_notify_desc.bEndpointAddress;
+
+ ss_ecm_in_desc.bEndpointAddress = fs_ecm_in_desc.bEndpointAddress;
+ ss_ecm_out_desc.bEndpointAddress = fs_ecm_out_desc.bEndpointAddress;
+ ss_ecm_notify_desc.bEndpointAddress =
+ fs_ecm_notify_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, ecm_fs_function, ecm_hs_function,
+ ecm_ss_function);
+ if (status)
+ goto fail;
+
+ /* NOTE: all that is done without knowing or caring about
+ * the network link ... which is unavailable to this code
+ * until we're activated via set_alt().
+ */
+
+ ecm->port.open = ecm_open;
+ ecm->port.close = ecm_close;
+
+ DBG(cdev, "CDC Ethernet: %s speed IN/%s OUT/%s NOTIFY/%s\n",
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ ecm->port.in_ep->name, ecm->port.out_ep->name,
+ ecm->notify->name);
+ return 0;
+
+fail:
+ if (ecm->notify_req) {
+ kfree(ecm->notify_req->buf);
+ usb_ep_free_request(ecm->notify, ecm->notify_req);
+ }
+
+ /* we might as well release our claims on endpoints */
+ if (ecm->notify)
+ ecm->notify->driver_data = NULL;
+ if (ecm->port.out_ep)
+ ecm->port.out_ep->driver_data = NULL;
+ if (ecm->port.in_ep)
+ ecm->port.in_ep->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+static inline struct f_ecm_opts *to_f_ecm_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_ecm_opts,
+ func_inst.group);
+}
+
+/* f_ecm_item_ops */
+USB_ETHERNET_CONFIGFS_ITEM(ecm);
+
+/* f_ecm_opts_dev_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ecm);
+
+/* f_ecm_opts_host_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ecm);
+
+/* f_ecm_opts_qmult */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ecm);
+
+/* f_ecm_opts_ifname */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ecm);
+
+static struct configfs_attribute *ecm_attrs[] = {
+ &f_ecm_opts_dev_addr.attr,
+ &f_ecm_opts_host_addr.attr,
+ &f_ecm_opts_qmult.attr,
+ &f_ecm_opts_ifname.attr,
+ NULL,
+};
+
+static struct config_item_type ecm_func_type = {
+ .ct_item_ops = &ecm_item_ops,
+ .ct_attrs = ecm_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void ecm_free_inst(struct usb_function_instance *f)
+{
+ struct f_ecm_opts *opts;
+
+ opts = container_of(f, struct f_ecm_opts, func_inst);
+ if (opts->bound)
+ gether_cleanup(netdev_priv(opts->net));
+ else
+ free_netdev(opts->net);
+ kfree(opts);
+}
+
+static struct usb_function_instance *ecm_alloc_inst(void)
+{
+ struct f_ecm_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&opts->lock);
+ opts->func_inst.free_func_inst = ecm_free_inst;
+ opts->net = gether_setup_default();
+ if (IS_ERR(opts->net)) {
+ struct net_device *net = opts->net;
+ kfree(opts);
+ return ERR_CAST(net);
+ }
+
+ config_group_init_type_name(&opts->func_inst.group, "", &ecm_func_type);
+
+ return &opts->func_inst;
+}
+
+static void ecm_free(struct usb_function *f)
+{
+ struct f_ecm *ecm;
+ struct f_ecm_opts *opts;
+
+ ecm = func_to_ecm(f);
+ opts = container_of(f->fi, struct f_ecm_opts, func_inst);
+ kfree(ecm);
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+}
+
+static void ecm_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_ecm *ecm = func_to_ecm(f);
+
+ DBG(c->cdev, "ecm unbind\n");
+
+ usb_free_all_descriptors(f);
+
+ kfree(ecm->notify_req->buf);
+ usb_ep_free_request(ecm->notify, ecm->notify_req);
+}
+
+static struct usb_function *ecm_alloc(struct usb_function_instance *fi)
+{
+ struct f_ecm *ecm;
+ struct f_ecm_opts *opts;
+ int status;
+
+ /* allocate and initialize one new instance */
+ ecm = kzalloc(sizeof(*ecm), GFP_KERNEL);
+ if (!ecm)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_ecm_opts, func_inst);
+ mutex_lock(&opts->lock);
+ opts->refcnt++;
+
+ /* export host's Ethernet address in CDC format */
+ status = gether_get_host_addr_cdc(opts->net, ecm->ethaddr,
+ sizeof(ecm->ethaddr));
+ if (status < 12) {
+ kfree(ecm);
+ mutex_unlock(&opts->lock);
+ return ERR_PTR(-EINVAL);
+ }
+ ecm_string_defs[1].s = ecm->ethaddr;
+
+ ecm->port.ioport = netdev_priv(opts->net);
+ mutex_unlock(&opts->lock);
+ ecm->port.cdc_filter = DEFAULT_FILTER;
+
+ ecm->port.func.name = "cdc_ethernet";
+ /* descriptors are per-instance copies */
+ ecm->port.func.bind = ecm_bind;
+ ecm->port.func.unbind = ecm_unbind;
+ ecm->port.func.set_alt = ecm_set_alt;
+ ecm->port.func.get_alt = ecm_get_alt;
+ ecm->port.func.setup = ecm_setup;
+ ecm->port.func.disable = ecm_disable;
+ ecm->port.func.free_func = ecm_free;
+
+ return &ecm->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(ecm, ecm_alloc_inst, ecm_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Brownell");
--- /dev/null
+/*
+ * f_eem.c -- USB CDC Ethernet (EEM) link function driver
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2009 EF Johnson Technologies
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/crc32.h>
+#include <linux/slab.h>
+
+#include "u_ether.h"
+#include "u_ether_configfs.h"
+#include "u_eem.h"
+
+#define EEM_HLEN 2
+
+/*
+ * This function is a "CDC Ethernet Emulation Model" (CDC EEM)
+ * Ethernet link.
+ */
+
+struct f_eem {
+ struct gether port;
+ u8 ctrl_id;
+};
+
+static inline struct f_eem *func_to_eem(struct usb_function *f)
+{
+ return container_of(f, struct f_eem, port.func);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* interface descriptor: */
+
+static struct usb_interface_descriptor eem_intf = {
+ .bLength = sizeof eem_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_EEM,
+ .bInterfaceProtocol = USB_CDC_PROTO_EEM,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor eem_fs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor eem_fs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *eem_fs_function[] = {
+ /* CDC EEM control descriptors */
+ (struct usb_descriptor_header *) &eem_intf,
+ (struct usb_descriptor_header *) &eem_fs_in_desc,
+ (struct usb_descriptor_header *) &eem_fs_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor eem_hs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor eem_hs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *eem_hs_function[] = {
+ /* CDC EEM control descriptors */
+ (struct usb_descriptor_header *) &eem_intf,
+ (struct usb_descriptor_header *) &eem_hs_in_desc,
+ (struct usb_descriptor_header *) &eem_hs_out_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor eem_ss_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor eem_ss_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor eem_ss_bulk_comp_desc = {
+ .bLength = sizeof eem_ss_bulk_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 2 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
+static struct usb_descriptor_header *eem_ss_function[] = {
+ /* CDC EEM control descriptors */
+ (struct usb_descriptor_header *) &eem_intf,
+ (struct usb_descriptor_header *) &eem_ss_in_desc,
+ (struct usb_descriptor_header *) &eem_ss_bulk_comp_desc,
+ (struct usb_descriptor_header *) &eem_ss_out_desc,
+ (struct usb_descriptor_header *) &eem_ss_bulk_comp_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+static struct usb_string eem_string_defs[] = {
+ [0].s = "CDC Ethernet Emulation Model (EEM)",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings eem_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = eem_string_defs,
+};
+
+static struct usb_gadget_strings *eem_strings[] = {
+ &eem_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int eem_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+
+static int eem_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_eem *eem = func_to_eem(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct net_device *net;
+
+ /* we know alt == 0, so this is an activation or a reset */
+ if (alt != 0)
+ goto fail;
+
+ if (intf == eem->ctrl_id) {
+
+ if (eem->port.in_ep->driver_data) {
+ DBG(cdev, "reset eem\n");
+ gether_disconnect(&eem->port);
+ }
+
+ if (!eem->port.in_ep->desc || !eem->port.out_ep->desc) {
+ DBG(cdev, "init eem\n");
+ if (config_ep_by_speed(cdev->gadget, f,
+ eem->port.in_ep) ||
+ config_ep_by_speed(cdev->gadget, f,
+ eem->port.out_ep)) {
+ eem->port.in_ep->desc = NULL;
+ eem->port.out_ep->desc = NULL;
+ goto fail;
+ }
+ }
+
+ /* zlps should not occur because zero-length EEM packets
+ * will be inserted in those cases where they would occur
+ */
+ eem->port.is_zlp_ok = 1;
+ eem->port.cdc_filter = DEFAULT_FILTER;
+ DBG(cdev, "activate eem\n");
+ net = gether_connect(&eem->port);
+ if (IS_ERR(net))
+ return PTR_ERR(net);
+ } else
+ goto fail;
+
+ return 0;
+fail:
+ return -EINVAL;
+}
+
+static void eem_disable(struct usb_function *f)
+{
+ struct f_eem *eem = func_to_eem(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "eem deactivated\n");
+
+ if (eem->port.in_ep->driver_data)
+ gether_disconnect(&eem->port);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* EEM function driver setup/binding */
+
+static int eem_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_eem *eem = func_to_eem(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+
+ struct f_eem_opts *eem_opts;
+
+ eem_opts = container_of(f->fi, struct f_eem_opts, func_inst);
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to eem_opts->bound access
+ */
+ if (!eem_opts->bound) {
+ mutex_lock(&eem_opts->lock);
+ gether_set_gadget(eem_opts->net, cdev->gadget);
+ status = gether_register_netdev(eem_opts->net);
+ mutex_unlock(&eem_opts->lock);
+ if (status)
+ return status;
+ eem_opts->bound = true;
+ }
+
+ us = usb_gstrings_attach(cdev, eem_strings,
+ ARRAY_SIZE(eem_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+ eem_intf.iInterface = us[0].id;
+
+ /* allocate instance-specific interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ eem->ctrl_id = status;
+ eem_intf.bInterfaceNumber = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &eem_fs_in_desc);
+ if (!ep)
+ goto fail;
+ eem->port.in_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &eem_fs_out_desc);
+ if (!ep)
+ goto fail;
+ eem->port.out_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ status = -ENOMEM;
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ eem_hs_in_desc.bEndpointAddress = eem_fs_in_desc.bEndpointAddress;
+ eem_hs_out_desc.bEndpointAddress = eem_fs_out_desc.bEndpointAddress;
+
+ eem_ss_in_desc.bEndpointAddress = eem_fs_in_desc.bEndpointAddress;
+ eem_ss_out_desc.bEndpointAddress = eem_fs_out_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, eem_fs_function, eem_hs_function,
+ eem_ss_function);
+ if (status)
+ goto fail;
+
+ DBG(cdev, "CDC Ethernet (EEM): %s speed IN/%s OUT/%s\n",
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ eem->port.in_ep->name, eem->port.out_ep->name);
+ return 0;
+
+fail:
+ usb_free_all_descriptors(f);
+ if (eem->port.out_ep)
+ eem->port.out_ep->driver_data = NULL;
+ if (eem->port.in_ep)
+ eem->port.in_ep->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+static void eem_cmd_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct sk_buff *skb = (struct sk_buff *)req->context;
+
+ dev_kfree_skb_any(skb);
+}
+
+/*
+ * Add the EEM header and ethernet checksum.
+ * We currently do not attempt to put multiple ethernet frames
+ * into a single USB transfer
+ */
+static struct sk_buff *eem_wrap(struct gether *port, struct sk_buff *skb)
+{
+ struct sk_buff *skb2 = NULL;
+ struct usb_ep *in = port->in_ep;
+ int padlen = 0;
+ u16 len = skb->len;
+
+ int headroom = skb_headroom(skb);
+ int tailroom = skb_tailroom(skb);
+
+ /* When (len + EEM_HLEN + ETH_FCS_LEN) % in->maxpacket) is 0,
+ * stick two bytes of zero-length EEM packet on the end.
+ */
+ if (((len + EEM_HLEN + ETH_FCS_LEN) % in->maxpacket) == 0)
+ padlen += 2;
+
+ if ((tailroom >= (ETH_FCS_LEN + padlen)) &&
+ (headroom >= EEM_HLEN) && !skb_cloned(skb))
+ goto done;
+
+ skb2 = skb_copy_expand(skb, EEM_HLEN, ETH_FCS_LEN + padlen, GFP_ATOMIC);
+ dev_kfree_skb_any(skb);
+ skb = skb2;
+ if (!skb)
+ return skb;
+
+done:
+ /* use the "no CRC" option */
+ put_unaligned_be32(0xdeadbeef, skb_put(skb, 4));
+
+ /* EEM packet header format:
+ * b0..13: length of ethernet frame
+ * b14: bmCRC (0 == sentinel CRC)
+ * b15: bmType (0 == data)
+ */
+ len = skb->len;
+ put_unaligned_le16(len & 0x3FFF, skb_push(skb, 2));
+
+ /* add a zero-length EEM packet, if needed */
+ if (padlen)
+ put_unaligned_le16(0, skb_put(skb, 2));
+
+ return skb;
+}
+
+/*
+ * Remove the EEM header. Note that there can be many EEM packets in a single
+ * USB transfer, so we need to break them out and handle them independently.
+ */
+static int eem_unwrap(struct gether *port,
+ struct sk_buff *skb,
+ struct sk_buff_head *list)
+{
+ struct usb_composite_dev *cdev = port->func.config->cdev;
+ int status = 0;
+
+ do {
+ struct sk_buff *skb2;
+ u16 header;
+ u16 len = 0;
+
+ if (skb->len < EEM_HLEN) {
+ status = -EINVAL;
+ DBG(cdev, "invalid EEM header\n");
+ goto error;
+ }
+
+ /* remove the EEM header */
+ header = get_unaligned_le16(skb->data);
+ skb_pull(skb, EEM_HLEN);
+
+ /* EEM packet header format:
+ * b0..14: EEM type dependent (data or command)
+ * b15: bmType (0 == data, 1 == command)
+ */
+ if (header & BIT(15)) {
+ struct usb_request *req = cdev->req;
+ u16 bmEEMCmd;
+
+ /* EEM command packet format:
+ * b0..10: bmEEMCmdParam
+ * b11..13: bmEEMCmd
+ * b14: reserved (must be zero)
+ * b15: bmType (1 == command)
+ */
+ if (header & BIT(14))
+ continue;
+
+ bmEEMCmd = (header >> 11) & 0x7;
+ switch (bmEEMCmd) {
+ case 0: /* echo */
+ len = header & 0x7FF;
+ if (skb->len < len) {
+ status = -EOVERFLOW;
+ goto error;
+ }
+
+ skb2 = skb_clone(skb, GFP_ATOMIC);
+ if (unlikely(!skb2)) {
+ DBG(cdev, "EEM echo response error\n");
+ goto next;
+ }
+ skb_trim(skb2, len);
+ put_unaligned_le16(BIT(15) | BIT(11) | len,
+ skb_push(skb2, 2));
+ skb_copy_bits(skb2, 0, req->buf, skb2->len);
+ req->length = skb2->len;
+ req->complete = eem_cmd_complete;
+ req->zero = 1;
+ req->context = skb2;
+ if (usb_ep_queue(port->in_ep, req, GFP_ATOMIC))
+ DBG(cdev, "echo response queue fail\n");
+ break;
+
+ case 1: /* echo response */
+ case 2: /* suspend hint */
+ case 3: /* response hint */
+ case 4: /* response complete hint */
+ case 5: /* tickle */
+ default: /* reserved */
+ continue;
+ }
+ } else {
+ u32 crc, crc2;
+ struct sk_buff *skb3;
+
+ /* check for zero-length EEM packet */
+ if (header == 0)
+ continue;
+
+ /* EEM data packet format:
+ * b0..13: length of ethernet frame
+ * b14: bmCRC (0 == sentinel, 1 == calculated)
+ * b15: bmType (0 == data)
+ */
+ len = header & 0x3FFF;
+ if ((skb->len < len)
+ || (len < (ETH_HLEN + ETH_FCS_LEN))) {
+ status = -EINVAL;
+ goto error;
+ }
+
+ /* validate CRC */
+ if (header & BIT(14)) {
+ crc = get_unaligned_le32(skb->data + len
+ - ETH_FCS_LEN);
+ crc2 = ~crc32_le(~0,
+ skb->data, len - ETH_FCS_LEN);
+ } else {
+ crc = get_unaligned_be32(skb->data + len
+ - ETH_FCS_LEN);
+ crc2 = 0xdeadbeef;
+ }
+ if (crc != crc2) {
+ DBG(cdev, "invalid EEM CRC\n");
+ goto next;
+ }
+
+ skb2 = skb_clone(skb, GFP_ATOMIC);
+ if (unlikely(!skb2)) {
+ DBG(cdev, "unable to unframe EEM packet\n");
+ continue;
+ }
+ skb_trim(skb2, len - ETH_FCS_LEN);
+
+ skb3 = skb_copy_expand(skb2,
+ NET_IP_ALIGN,
+ 0,
+ GFP_ATOMIC);
+ if (unlikely(!skb3)) {
+ DBG(cdev, "unable to realign EEM packet\n");
+ dev_kfree_skb_any(skb2);
+ continue;
+ }
+ dev_kfree_skb_any(skb2);
+ skb_queue_tail(list, skb3);
+ }
+next:
+ skb_pull(skb, len);
+ } while (skb->len);
+
+error:
+ dev_kfree_skb_any(skb);
+ return status;
+}
+
+static inline struct f_eem_opts *to_f_eem_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_eem_opts,
+ func_inst.group);
+}
+
+/* f_eem_item_ops */
+USB_ETHERNET_CONFIGFS_ITEM(eem);
+
+/* f_eem_opts_dev_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(eem);
+
+/* f_eem_opts_host_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(eem);
+
+/* f_eem_opts_qmult */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(eem);
+
+/* f_eem_opts_ifname */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(eem);
+
+static struct configfs_attribute *eem_attrs[] = {
+ &f_eem_opts_dev_addr.attr,
+ &f_eem_opts_host_addr.attr,
+ &f_eem_opts_qmult.attr,
+ &f_eem_opts_ifname.attr,
+ NULL,
+};
+
+static struct config_item_type eem_func_type = {
+ .ct_item_ops = &eem_item_ops,
+ .ct_attrs = eem_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void eem_free_inst(struct usb_function_instance *f)
+{
+ struct f_eem_opts *opts;
+
+ opts = container_of(f, struct f_eem_opts, func_inst);
+ if (opts->bound)
+ gether_cleanup(netdev_priv(opts->net));
+ else
+ free_netdev(opts->net);
+ kfree(opts);
+}
+
+static struct usb_function_instance *eem_alloc_inst(void)
+{
+ struct f_eem_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&opts->lock);
+ opts->func_inst.free_func_inst = eem_free_inst;
+ opts->net = gether_setup_default();
+ if (IS_ERR(opts->net)) {
+ struct net_device *net = opts->net;
+ kfree(opts);
+ return ERR_CAST(net);
+ }
+
+ config_group_init_type_name(&opts->func_inst.group, "", &eem_func_type);
+
+ return &opts->func_inst;
+}
+
+static void eem_free(struct usb_function *f)
+{
+ struct f_eem *eem;
+ struct f_eem_opts *opts;
+
+ eem = func_to_eem(f);
+ opts = container_of(f->fi, struct f_eem_opts, func_inst);
+ kfree(eem);
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+}
+
+static void eem_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ DBG(c->cdev, "eem unbind\n");
+
+ usb_free_all_descriptors(f);
+}
+
+static struct usb_function *eem_alloc(struct usb_function_instance *fi)
+{
+ struct f_eem *eem;
+ struct f_eem_opts *opts;
+
+ /* allocate and initialize one new instance */
+ eem = kzalloc(sizeof(*eem), GFP_KERNEL);
+ if (!eem)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_eem_opts, func_inst);
+ mutex_lock(&opts->lock);
+ opts->refcnt++;
+
+ eem->port.ioport = netdev_priv(opts->net);
+ mutex_unlock(&opts->lock);
+ eem->port.cdc_filter = DEFAULT_FILTER;
+
+ eem->port.func.name = "cdc_eem";
+ /* descriptors are per-instance copies */
+ eem->port.func.bind = eem_bind;
+ eem->port.func.unbind = eem_unbind;
+ eem->port.func.set_alt = eem_set_alt;
+ eem->port.func.setup = eem_setup;
+ eem->port.func.disable = eem_disable;
+ eem->port.func.free_func = eem_free;
+ eem->port.wrap = eem_wrap;
+ eem->port.unwrap = eem_unwrap;
+ eem->port.header_len = EEM_HLEN;
+
+ return &eem->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(eem, eem_alloc_inst, eem_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Brownell");
--- /dev/null
+/*
+ * f_fs.c -- user mode file system API for USB composite function controllers
+ *
+ * Copyright (C) 2010 Samsung Electronics
+ * Author: Michal Nazarewicz <mina86@mina86.com>
+ *
+ * Based on inode.c (GadgetFS) which was:
+ * Copyright (C) 2003-2004 David Brownell
+ * Copyright (C) 2003 Agilent Technologies
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/blkdev.h>
+#include <linux/pagemap.h>
+#include <linux/export.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+
+#include <linux/usb/composite.h>
+#include <linux/usb/functionfs.h>
+
+#include <linux/aio.h>
+#include <linux/mmu_context.h>
+#include <linux/poll.h>
+
+#include "u_fs.h"
+#include "u_f.h"
+#include "u_os_desc.h"
+#include "configfs.h"
+
+#define FUNCTIONFS_MAGIC 0xa647361 /* Chosen by a honest dice roll ;) */
+
+/* Reference counter handling */
+static void ffs_data_get(struct ffs_data *ffs);
+static void ffs_data_put(struct ffs_data *ffs);
+/* Creates new ffs_data object. */
+static struct ffs_data *__must_check ffs_data_new(void) __attribute__((malloc));
+
+/* Opened counter handling. */
+static void ffs_data_opened(struct ffs_data *ffs);
+static void ffs_data_closed(struct ffs_data *ffs);
+
+/* Called with ffs->mutex held; take over ownership of data. */
+static int __must_check
+__ffs_data_got_descs(struct ffs_data *ffs, char *data, size_t len);
+static int __must_check
+__ffs_data_got_strings(struct ffs_data *ffs, char *data, size_t len);
+
+
+/* The function structure ***************************************************/
+
+struct ffs_ep;
+
+struct ffs_function {
+ struct usb_configuration *conf;
+ struct usb_gadget *gadget;
+ struct ffs_data *ffs;
+
+ struct ffs_ep *eps;
+ u8 eps_revmap[16];
+ short *interfaces_nums;
+
+ struct usb_function function;
+};
+
+
+static struct ffs_function *ffs_func_from_usb(struct usb_function *f)
+{
+ return container_of(f, struct ffs_function, function);
+}
+
+
+static inline enum ffs_setup_state
+ffs_setup_state_clear_cancelled(struct ffs_data *ffs)
+{
+ return (enum ffs_setup_state)
+ cmpxchg(&ffs->setup_state, FFS_SETUP_CANCELLED, FFS_NO_SETUP);
+}
+
+
+static void ffs_func_eps_disable(struct ffs_function *func);
+static int __must_check ffs_func_eps_enable(struct ffs_function *func);
+
+static int ffs_func_bind(struct usb_configuration *,
+ struct usb_function *);
+static int ffs_func_set_alt(struct usb_function *, unsigned, unsigned);
+static void ffs_func_disable(struct usb_function *);
+static int ffs_func_setup(struct usb_function *,
+ const struct usb_ctrlrequest *);
+static void ffs_func_suspend(struct usb_function *);
+static void ffs_func_resume(struct usb_function *);
+
+
+static int ffs_func_revmap_ep(struct ffs_function *func, u8 num);
+static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf);
+
+
+/* The endpoints structures *************************************************/
+
+struct ffs_ep {
+ struct usb_ep *ep; /* P: ffs->eps_lock */
+ struct usb_request *req; /* P: epfile->mutex */
+
+ /* [0]: full speed, [1]: high speed, [2]: super speed */
+ struct usb_endpoint_descriptor *descs[3];
+
+ u8 num;
+
+ int status; /* P: epfile->mutex */
+};
+
+struct ffs_epfile {
+ /* Protects ep->ep and ep->req. */
+ struct mutex mutex;
+ wait_queue_head_t wait;
+
+ struct ffs_data *ffs;
+ struct ffs_ep *ep; /* P: ffs->eps_lock */
+
+ struct dentry *dentry;
+
+ char name[5];
+
+ unsigned char in; /* P: ffs->eps_lock */
+ unsigned char isoc; /* P: ffs->eps_lock */
+
+ unsigned char _pad;
+};
+
+/* ffs_io_data structure ***************************************************/
+
+struct ffs_io_data {
+ bool aio;
+ bool read;
+
+ struct kiocb *kiocb;
+ const struct iovec *iovec;
+ unsigned long nr_segs;
+ char __user *buf;
+ size_t len;
+
+ struct mm_struct *mm;
+ struct work_struct work;
+
+ struct usb_ep *ep;
+ struct usb_request *req;
+};
+
+static int __must_check ffs_epfiles_create(struct ffs_data *ffs);
+static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count);
+
+static struct inode *__must_check
+ffs_sb_create_file(struct super_block *sb, const char *name, void *data,
+ const struct file_operations *fops,
+ struct dentry **dentry_p);
+
+/* Devices management *******************************************************/
+
+DEFINE_MUTEX(ffs_lock);
+EXPORT_SYMBOL_GPL(ffs_lock);
+
+static struct ffs_dev *_ffs_find_dev(const char *name);
+static struct ffs_dev *_ffs_alloc_dev(void);
+static int _ffs_name_dev(struct ffs_dev *dev, const char *name);
+static void _ffs_free_dev(struct ffs_dev *dev);
+static void *ffs_acquire_dev(const char *dev_name);
+static void ffs_release_dev(struct ffs_data *ffs_data);
+static int ffs_ready(struct ffs_data *ffs);
+static void ffs_closed(struct ffs_data *ffs);
+
+/* Misc helper functions ****************************************************/
+
+static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
+ __attribute__((warn_unused_result, nonnull));
+static char *ffs_prepare_buffer(const char __user *buf, size_t len)
+ __attribute__((warn_unused_result, nonnull));
+
+
+/* Control file aka ep0 *****************************************************/
+
+static void ffs_ep0_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ffs_data *ffs = req->context;
+
+ complete_all(&ffs->ep0req_completion);
+}
+
+static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
+{
+ struct usb_request *req = ffs->ep0req;
+ int ret;
+
+ req->zero = len < le16_to_cpu(ffs->ev.setup.wLength);
+
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+
+ req->buf = data;
+ req->length = len;
+
+ /*
+ * UDC layer requires to provide a buffer even for ZLP, but should
+ * not use it at all. Let's provide some poisoned pointer to catch
+ * possible bug in the driver.
+ */
+ if (req->buf == NULL)
+ req->buf = (void *)0xDEADBABE;
+
+ reinit_completion(&ffs->ep0req_completion);
+
+ ret = usb_ep_queue(ffs->gadget->ep0, req, GFP_ATOMIC);
+ if (unlikely(ret < 0))
+ return ret;
+
+ ret = wait_for_completion_interruptible(&ffs->ep0req_completion);
+ if (unlikely(ret)) {
+ usb_ep_dequeue(ffs->gadget->ep0, req);
+ return -EINTR;
+ }
+
+ ffs->setup_state = FFS_NO_SETUP;
+ return req->status ? req->status : req->actual;
+}
+
+static int __ffs_ep0_stall(struct ffs_data *ffs)
+{
+ if (ffs->ev.can_stall) {
+ pr_vdebug("ep0 stall\n");
+ usb_ep_set_halt(ffs->gadget->ep0);
+ ffs->setup_state = FFS_NO_SETUP;
+ return -EL2HLT;
+ } else {
+ pr_debug("bogus ep0 stall!\n");
+ return -ESRCH;
+ }
+}
+
+static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ptr)
+{
+ struct ffs_data *ffs = file->private_data;
+ ssize_t ret;
+ char *data;
+
+ ENTER();
+
+ /* Fast check if setup was canceled */
+ if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
+ return -EIDRM;
+
+ /* Acquire mutex */
+ ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
+ if (unlikely(ret < 0))
+ return ret;
+
+ /* Check state */
+ switch (ffs->state) {
+ case FFS_READ_DESCRIPTORS:
+ case FFS_READ_STRINGS:
+ /* Copy data */
+ if (unlikely(len < 16)) {
+ ret = -EINVAL;
+ break;
+ }
+
+ data = ffs_prepare_buffer(buf, len);
+ if (IS_ERR(data)) {
+ ret = PTR_ERR(data);
+ break;
+ }
+
+ /* Handle data */
+ if (ffs->state == FFS_READ_DESCRIPTORS) {
+ pr_info("read descriptors\n");
+ ret = __ffs_data_got_descs(ffs, data, len);
+ if (unlikely(ret < 0))
+ break;
+
+ ffs->state = FFS_READ_STRINGS;
+ ret = len;
+ } else {
+ pr_info("read strings\n");
+ ret = __ffs_data_got_strings(ffs, data, len);
+ if (unlikely(ret < 0))
+ break;
+
+ ret = ffs_epfiles_create(ffs);
+ if (unlikely(ret)) {
+ ffs->state = FFS_CLOSING;
+ break;
+ }
+
+ ffs->state = FFS_ACTIVE;
+ mutex_unlock(&ffs->mutex);
+
+ ret = ffs_ready(ffs);
+ if (unlikely(ret < 0)) {
+ ffs->state = FFS_CLOSING;
+ return ret;
+ }
+
+ set_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags);
+ return len;
+ }
+ break;
+
+ case FFS_ACTIVE:
+ data = NULL;
+ /*
+ * We're called from user space, we can use _irq
+ * rather then _irqsave
+ */
+ spin_lock_irq(&ffs->ev.waitq.lock);
+ switch (ffs_setup_state_clear_cancelled(ffs)) {
+ case FFS_SETUP_CANCELLED:
+ ret = -EIDRM;
+ goto done_spin;
+
+ case FFS_NO_SETUP:
+ ret = -ESRCH;
+ goto done_spin;
+
+ case FFS_SETUP_PENDING:
+ break;
+ }
+
+ /* FFS_SETUP_PENDING */
+ if (!(ffs->ev.setup.bRequestType & USB_DIR_IN)) {
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+ ret = __ffs_ep0_stall(ffs);
+ break;
+ }
+
+ /* FFS_SETUP_PENDING and not stall */
+ len = min(len, (size_t)le16_to_cpu(ffs->ev.setup.wLength));
+
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+
+ data = ffs_prepare_buffer(buf, len);
+ if (IS_ERR(data)) {
+ ret = PTR_ERR(data);
+ break;
+ }
+
+ spin_lock_irq(&ffs->ev.waitq.lock);
+
+ /*
+ * We are guaranteed to be still in FFS_ACTIVE state
+ * but the state of setup could have changed from
+ * FFS_SETUP_PENDING to FFS_SETUP_CANCELLED so we need
+ * to check for that. If that happened we copied data
+ * from user space in vain but it's unlikely.
+ *
+ * For sure we are not in FFS_NO_SETUP since this is
+ * the only place FFS_SETUP_PENDING -> FFS_NO_SETUP
+ * transition can be performed and it's protected by
+ * mutex.
+ */
+ if (ffs_setup_state_clear_cancelled(ffs) ==
+ FFS_SETUP_CANCELLED) {
+ ret = -EIDRM;
+done_spin:
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+ } else {
+ /* unlocks spinlock */
+ ret = __ffs_ep0_queue_wait(ffs, data, len);
+ }
+ kfree(data);
+ break;
+
+ default:
+ ret = -EBADFD;
+ break;
+ }
+
+ mutex_unlock(&ffs->mutex);
+ return ret;
+}
+
+static ssize_t __ffs_ep0_read_events(struct ffs_data *ffs, char __user *buf,
+ size_t n)
+{
+ /*
+ * We are holding ffs->ev.waitq.lock and ffs->mutex and we need
+ * to release them.
+ */
+ struct usb_functionfs_event events[n];
+ unsigned i = 0;
+
+ memset(events, 0, sizeof events);
+
+ do {
+ events[i].type = ffs->ev.types[i];
+ if (events[i].type == FUNCTIONFS_SETUP) {
+ events[i].u.setup = ffs->ev.setup;
+ ffs->setup_state = FFS_SETUP_PENDING;
+ }
+ } while (++i < n);
+
+ if (n < ffs->ev.count) {
+ ffs->ev.count -= n;
+ memmove(ffs->ev.types, ffs->ev.types + n,
+ ffs->ev.count * sizeof *ffs->ev.types);
+ } else {
+ ffs->ev.count = 0;
+ }
+
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+ mutex_unlock(&ffs->mutex);
+
+ return unlikely(__copy_to_user(buf, events, sizeof events))
+ ? -EFAULT : sizeof events;
+}
+
+static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ptr)
+{
+ struct ffs_data *ffs = file->private_data;
+ char *data = NULL;
+ size_t n;
+ int ret;
+
+ ENTER();
+
+ /* Fast check if setup was canceled */
+ if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
+ return -EIDRM;
+
+ /* Acquire mutex */
+ ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
+ if (unlikely(ret < 0))
+ return ret;
+
+ /* Check state */
+ if (ffs->state != FFS_ACTIVE) {
+ ret = -EBADFD;
+ goto done_mutex;
+ }
+
+ /*
+ * We're called from user space, we can use _irq rather then
+ * _irqsave
+ */
+ spin_lock_irq(&ffs->ev.waitq.lock);
+
+ switch (ffs_setup_state_clear_cancelled(ffs)) {
+ case FFS_SETUP_CANCELLED:
+ ret = -EIDRM;
+ break;
+
+ case FFS_NO_SETUP:
+ n = len / sizeof(struct usb_functionfs_event);
+ if (unlikely(!n)) {
+ ret = -EINVAL;
+ break;
+ }
+
+ if ((file->f_flags & O_NONBLOCK) && !ffs->ev.count) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ if (wait_event_interruptible_exclusive_locked_irq(ffs->ev.waitq,
+ ffs->ev.count)) {
+ ret = -EINTR;
+ break;
+ }
+
+ return __ffs_ep0_read_events(ffs, buf,
+ min(n, (size_t)ffs->ev.count));
+
+ case FFS_SETUP_PENDING:
+ if (ffs->ev.setup.bRequestType & USB_DIR_IN) {
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+ ret = __ffs_ep0_stall(ffs);
+ goto done_mutex;
+ }
+
+ len = min(len, (size_t)le16_to_cpu(ffs->ev.setup.wLength));
+
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+
+ if (likely(len)) {
+ data = kmalloc(len, GFP_KERNEL);
+ if (unlikely(!data)) {
+ ret = -ENOMEM;
+ goto done_mutex;
+ }
+ }
+
+ spin_lock_irq(&ffs->ev.waitq.lock);
+
+ /* See ffs_ep0_write() */
+ if (ffs_setup_state_clear_cancelled(ffs) ==
+ FFS_SETUP_CANCELLED) {
+ ret = -EIDRM;
+ break;
+ }
+
+ /* unlocks spinlock */
+ ret = __ffs_ep0_queue_wait(ffs, data, len);
+ if (likely(ret > 0) && unlikely(__copy_to_user(buf, data, len)))
+ ret = -EFAULT;
+ goto done_mutex;
+
+ default:
+ ret = -EBADFD;
+ break;
+ }
+
+ spin_unlock_irq(&ffs->ev.waitq.lock);
+done_mutex:
+ mutex_unlock(&ffs->mutex);
+ kfree(data);
+ return ret;
+}
+
+static int ffs_ep0_open(struct inode *inode, struct file *file)
+{
+ struct ffs_data *ffs = inode->i_private;
+
+ ENTER();
+
+ if (unlikely(ffs->state == FFS_CLOSING))
+ return -EBUSY;
+
+ file->private_data = ffs;
+ ffs_data_opened(ffs);
+
+ return 0;
+}
+
+static int ffs_ep0_release(struct inode *inode, struct file *file)
+{
+ struct ffs_data *ffs = file->private_data;
+
+ ENTER();
+
+ ffs_data_closed(ffs);
+
+ return 0;
+}
+
+static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
+{
+ struct ffs_data *ffs = file->private_data;
+ struct usb_gadget *gadget = ffs->gadget;
+ long ret;
+
+ ENTER();
+
+ if (code == FUNCTIONFS_INTERFACE_REVMAP) {
+ struct ffs_function *func = ffs->func;
+ ret = func ? ffs_func_revmap_intf(func, value) : -ENODEV;
+ } else if (gadget && gadget->ops->ioctl) {
+ ret = gadget->ops->ioctl(gadget, code, value);
+ } else {
+ ret = -ENOTTY;
+ }
+
+ return ret;
+}
+
+static unsigned int ffs_ep0_poll(struct file *file, poll_table *wait)
+{
+ struct ffs_data *ffs = file->private_data;
+ unsigned int mask = POLLWRNORM;
+ int ret;
+
+ poll_wait(file, &ffs->ev.waitq, wait);
+
+ ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
+ if (unlikely(ret < 0))
+ return mask;
+
+ switch (ffs->state) {
+ case FFS_READ_DESCRIPTORS:
+ case FFS_READ_STRINGS:
+ mask |= POLLOUT;
+ break;
+
+ case FFS_ACTIVE:
+ switch (ffs->setup_state) {
+ case FFS_NO_SETUP:
+ if (ffs->ev.count)
+ mask |= POLLIN;
+ break;
+
+ case FFS_SETUP_PENDING:
+ case FFS_SETUP_CANCELLED:
+ mask |= (POLLIN | POLLOUT);
+ break;
+ }
+ case FFS_CLOSING:
+ break;
+ }
+
+ mutex_unlock(&ffs->mutex);
+
+ return mask;
+}
+
+static const struct file_operations ffs_ep0_operations = {
+ .llseek = no_llseek,
+
+ .open = ffs_ep0_open,
+ .write = ffs_ep0_write,
+ .read = ffs_ep0_read,
+ .release = ffs_ep0_release,
+ .unlocked_ioctl = ffs_ep0_ioctl,
+ .poll = ffs_ep0_poll,
+};
+
+
+/* "Normal" endpoints operations ********************************************/
+
+static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req)
+{
+ ENTER();
+ if (likely(req->context)) {
+ struct ffs_ep *ep = _ep->driver_data;
+ ep->status = req->status ? req->status : req->actual;
+ complete(req->context);
+ }
+}
+
+static void ffs_user_copy_worker(struct work_struct *work)
+{
+ struct ffs_io_data *io_data = container_of(work, struct ffs_io_data,
+ work);
+ int ret = io_data->req->status ? io_data->req->status :
+ io_data->req->actual;
+
+ if (io_data->read && ret > 0) {
+ int i;
+ size_t pos = 0;
+ use_mm(io_data->mm);
+ for (i = 0; i < io_data->nr_segs; i++) {
+ if (unlikely(copy_to_user(io_data->iovec[i].iov_base,
+ &io_data->buf[pos],
+ io_data->iovec[i].iov_len))) {
+ ret = -EFAULT;
+ break;
+ }
+ pos += io_data->iovec[i].iov_len;
+ }
+ unuse_mm(io_data->mm);
+ }
+
+ aio_complete(io_data->kiocb, ret, ret);
+
+ usb_ep_free_request(io_data->ep, io_data->req);
+
+ io_data->kiocb->private = NULL;
+ if (io_data->read)
+ kfree(io_data->iovec);
+ kfree(io_data->buf);
+ kfree(io_data);
+}
+
+static void ffs_epfile_async_io_complete(struct usb_ep *_ep,
+ struct usb_request *req)
+{
+ struct ffs_io_data *io_data = req->context;
+
+ ENTER();
+
+ INIT_WORK(&io_data->work, ffs_user_copy_worker);
+ schedule_work(&io_data->work);
+}
+
+static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
+{
+ struct ffs_epfile *epfile = file->private_data;
+ struct ffs_ep *ep;
+ char *data = NULL;
+ ssize_t ret, data_len;
+ int halt;
+
+ /* Are we still active? */
+ if (WARN_ON(epfile->ffs->state != FFS_ACTIVE)) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ /* Wait for endpoint to be enabled */
+ ep = epfile->ep;
+ if (!ep) {
+ if (file->f_flags & O_NONBLOCK) {
+ ret = -EAGAIN;
+ goto error;
+ }
+
+ ret = wait_event_interruptible(epfile->wait, (ep = epfile->ep));
+ if (ret) {
+ ret = -EINTR;
+ goto error;
+ }
+ }
+
+ /* Do we halt? */
+ halt = (!io_data->read == !epfile->in);
+ if (halt && epfile->isoc) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* Allocate & copy */
+ if (!halt) {
+ /*
+ * if we _do_ wait above, the epfile->ffs->gadget might be NULL
+ * before the waiting completes, so do not assign to 'gadget' earlier
+ */
+ struct usb_gadget *gadget = epfile->ffs->gadget;
+
+ spin_lock_irq(&epfile->ffs->eps_lock);
+ /* In the meantime, endpoint got disabled or changed. */
+ if (epfile->ep != ep) {
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+ return -ESHUTDOWN;
+ }
+ /*
+ * Controller may require buffer size to be aligned to
+ * maxpacketsize of an out endpoint.
+ */
+ data_len = io_data->read ?
+ usb_ep_align_maybe(gadget, ep->ep, io_data->len) :
+ io_data->len;
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+
+ data = kmalloc(data_len, GFP_KERNEL);
+ if (unlikely(!data))
+ return -ENOMEM;
+ if (io_data->aio && !io_data->read) {
+ int i;
+ size_t pos = 0;
+ for (i = 0; i < io_data->nr_segs; i++) {
+ if (unlikely(copy_from_user(&data[pos],
+ io_data->iovec[i].iov_base,
+ io_data->iovec[i].iov_len))) {
+ ret = -EFAULT;
+ goto error;
+ }
+ pos += io_data->iovec[i].iov_len;
+ }
+ } else {
+ if (!io_data->read &&
+ unlikely(__copy_from_user(data, io_data->buf,
+ io_data->len))) {
+ ret = -EFAULT;
+ goto error;
+ }
+ }
+ }
+
+ /* We will be using request */
+ ret = ffs_mutex_lock(&epfile->mutex, file->f_flags & O_NONBLOCK);
+ if (unlikely(ret))
+ goto error;
+
+ spin_lock_irq(&epfile->ffs->eps_lock);
+
+ if (epfile->ep != ep) {
+ /* In the meantime, endpoint got disabled or changed. */
+ ret = -ESHUTDOWN;
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+ } else if (halt) {
+ /* Halt */
+ if (likely(epfile->ep == ep) && !WARN_ON(!ep->ep))
+ usb_ep_set_halt(ep->ep);
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+ ret = -EBADMSG;
+ } else {
+ /* Fire the request */
+ struct usb_request *req;
+
+ if (io_data->aio) {
+ req = usb_ep_alloc_request(ep->ep, GFP_KERNEL);
+ if (unlikely(!req))
+ goto error_lock;
+
+ req->buf = data;
+ req->length = io_data->len;
+
+ io_data->buf = data;
+ io_data->ep = ep->ep;
+ io_data->req = req;
+
+ req->context = io_data;
+ req->complete = ffs_epfile_async_io_complete;
+
+ ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
+ if (unlikely(ret)) {
+ usb_ep_free_request(ep->ep, req);
+ goto error_lock;
+ }
+ ret = -EIOCBQUEUED;
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+ } else {
+ DECLARE_COMPLETION_ONSTACK(done);
+
+ req = ep->req;
+ req->buf = data;
+ req->length = io_data->len;
+
+ req->context = &done;
+ req->complete = ffs_epfile_io_complete;
+
+ ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+
+ if (unlikely(ret < 0)) {
+ /* nop */
+ } else if (unlikely(
+ wait_for_completion_interruptible(&done))) {
+ ret = -EINTR;
+ usb_ep_dequeue(ep->ep, req);
+ } else {
+ /*
+ * XXX We may end up silently droping data
+ * here. Since data_len (i.e. req->length) may
+ * be bigger than len (after being rounded up
+ * to maxpacketsize), we may end up with more
+ * data then user space has space for.
+ */
+ ret = ep->status;
+ if (io_data->read && ret > 0) {
+ ret = min_t(size_t, ret, io_data->len);
+
+ if (unlikely(copy_to_user(io_data->buf,
+ data, ret)))
+ ret = -EFAULT;
+ }
+ }
+ kfree(data);
+ }
+ }
+
+ mutex_unlock(&epfile->mutex);
+ return ret;
+
+error_lock:
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+ mutex_unlock(&epfile->mutex);
+error:
+ kfree(data);
+ return ret;
+}
+
+static ssize_t
+ffs_epfile_write(struct file *file, const char __user *buf, size_t len,
+ loff_t *ptr)
+{
+ struct ffs_io_data io_data;
+
+ ENTER();
+
+ io_data.aio = false;
+ io_data.read = false;
+ io_data.buf = (char * __user)buf;
+ io_data.len = len;
+
+ return ffs_epfile_io(file, &io_data);
+}
+
+static ssize_t
+ffs_epfile_read(struct file *file, char __user *buf, size_t len, loff_t *ptr)
+{
+ struct ffs_io_data io_data;
+
+ ENTER();
+
+ io_data.aio = false;
+ io_data.read = true;
+ io_data.buf = buf;
+ io_data.len = len;
+
+ return ffs_epfile_io(file, &io_data);
+}
+
+static int
+ffs_epfile_open(struct inode *inode, struct file *file)
+{
+ struct ffs_epfile *epfile = inode->i_private;
+
+ ENTER();
+
+ if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
+ return -ENODEV;
+
+ file->private_data = epfile;
+ ffs_data_opened(epfile->ffs);
+
+ return 0;
+}
+
+static int ffs_aio_cancel(struct kiocb *kiocb)
+{
+ struct ffs_io_data *io_data = kiocb->private;
+ struct ffs_epfile *epfile = kiocb->ki_filp->private_data;
+ int value;
+
+ ENTER();
+
+ spin_lock_irq(&epfile->ffs->eps_lock);
+
+ if (likely(io_data && io_data->ep && io_data->req))
+ value = usb_ep_dequeue(io_data->ep, io_data->req);
+ else
+ value = -EINVAL;
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+
+ return value;
+}
+
+static ssize_t ffs_epfile_aio_write(struct kiocb *kiocb,
+ const struct iovec *iovec,
+ unsigned long nr_segs, loff_t loff)
+{
+ struct ffs_io_data *io_data;
+
+ ENTER();
+
+ io_data = kmalloc(sizeof(*io_data), GFP_KERNEL);
+ if (unlikely(!io_data))
+ return -ENOMEM;
+
+ io_data->aio = true;
+ io_data->read = false;
+ io_data->kiocb = kiocb;
+ io_data->iovec = iovec;
+ io_data->nr_segs = nr_segs;
+ io_data->len = kiocb->ki_nbytes;
+ io_data->mm = current->mm;
+
+ kiocb->private = io_data;
+
+ kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
+
+ return ffs_epfile_io(kiocb->ki_filp, io_data);
+}
+
+static ssize_t ffs_epfile_aio_read(struct kiocb *kiocb,
+ const struct iovec *iovec,
+ unsigned long nr_segs, loff_t loff)
+{
+ struct ffs_io_data *io_data;
+ struct iovec *iovec_copy;
+
+ ENTER();
+
+ iovec_copy = kmalloc_array(nr_segs, sizeof(*iovec_copy), GFP_KERNEL);
+ if (unlikely(!iovec_copy))
+ return -ENOMEM;
+
+ memcpy(iovec_copy, iovec, sizeof(struct iovec)*nr_segs);
+
+ io_data = kmalloc(sizeof(*io_data), GFP_KERNEL);
+ if (unlikely(!io_data)) {
+ kfree(iovec_copy);
+ return -ENOMEM;
+ }
+
+ io_data->aio = true;
+ io_data->read = true;
+ io_data->kiocb = kiocb;
+ io_data->iovec = iovec_copy;
+ io_data->nr_segs = nr_segs;
+ io_data->len = kiocb->ki_nbytes;
+ io_data->mm = current->mm;
+
+ kiocb->private = io_data;
+
+ kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
+
+ return ffs_epfile_io(kiocb->ki_filp, io_data);
+}
+
+static int
+ffs_epfile_release(struct inode *inode, struct file *file)
+{
+ struct ffs_epfile *epfile = inode->i_private;
+
+ ENTER();
+
+ ffs_data_closed(epfile->ffs);
+
+ return 0;
+}
+
+static long ffs_epfile_ioctl(struct file *file, unsigned code,
+ unsigned long value)
+{
+ struct ffs_epfile *epfile = file->private_data;
+ int ret;
+
+ ENTER();
+
+ if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
+ return -ENODEV;
+
+ spin_lock_irq(&epfile->ffs->eps_lock);
+ if (likely(epfile->ep)) {
+ switch (code) {
+ case FUNCTIONFS_FIFO_STATUS:
+ ret = usb_ep_fifo_status(epfile->ep->ep);
+ break;
+ case FUNCTIONFS_FIFO_FLUSH:
+ usb_ep_fifo_flush(epfile->ep->ep);
+ ret = 0;
+ break;
+ case FUNCTIONFS_CLEAR_HALT:
+ ret = usb_ep_clear_halt(epfile->ep->ep);
+ break;
+ case FUNCTIONFS_ENDPOINT_REVMAP:
+ ret = epfile->ep->num;
+ break;
+ default:
+ ret = -ENOTTY;
+ }
+ } else {
+ ret = -ENODEV;
+ }
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+
+ return ret;
+}
+
+static const struct file_operations ffs_epfile_operations = {
+ .llseek = no_llseek,
+
+ .open = ffs_epfile_open,
+ .write = ffs_epfile_write,
+ .read = ffs_epfile_read,
+ .aio_write = ffs_epfile_aio_write,
+ .aio_read = ffs_epfile_aio_read,
+ .release = ffs_epfile_release,
+ .unlocked_ioctl = ffs_epfile_ioctl,
+};
+
+
+/* File system and super block operations ***********************************/
+
+/*
+ * Mounting the file system creates a controller file, used first for
+ * function configuration then later for event monitoring.
+ */
+
+static struct inode *__must_check
+ffs_sb_make_inode(struct super_block *sb, void *data,
+ const struct file_operations *fops,
+ const struct inode_operations *iops,
+ struct ffs_file_perms *perms)
+{
+ struct inode *inode;
+
+ ENTER();
+
+ inode = new_inode(sb);
+
+ if (likely(inode)) {
+ struct timespec current_time = CURRENT_TIME;
+
+ inode->i_ino = get_next_ino();
+ inode->i_mode = perms->mode;
+ inode->i_uid = perms->uid;
+ inode->i_gid = perms->gid;
+ inode->i_atime = current_time;
+ inode->i_mtime = current_time;
+ inode->i_ctime = current_time;
+ inode->i_private = data;
+ if (fops)
+ inode->i_fop = fops;
+ if (iops)
+ inode->i_op = iops;
+ }
+
+ return inode;
+}
+
+/* Create "regular" file */
+static struct inode *ffs_sb_create_file(struct super_block *sb,
+ const char *name, void *data,
+ const struct file_operations *fops,
+ struct dentry **dentry_p)
+{
+ struct ffs_data *ffs = sb->s_fs_info;
+ struct dentry *dentry;
+ struct inode *inode;
+
+ ENTER();
+
+ dentry = d_alloc_name(sb->s_root, name);
+ if (unlikely(!dentry))
+ return NULL;
+
+ inode = ffs_sb_make_inode(sb, data, fops, NULL, &ffs->file_perms);
+ if (unlikely(!inode)) {
+ dput(dentry);
+ return NULL;
+ }
+
+ d_add(dentry, inode);
+ if (dentry_p)
+ *dentry_p = dentry;
+
+ return inode;
+}
+
+/* Super block */
+static const struct super_operations ffs_sb_operations = {
+ .statfs = simple_statfs,
+ .drop_inode = generic_delete_inode,
+};
+
+struct ffs_sb_fill_data {
+ struct ffs_file_perms perms;
+ umode_t root_mode;
+ const char *dev_name;
+ struct ffs_data *ffs_data;
+};
+
+static int ffs_sb_fill(struct super_block *sb, void *_data, int silent)
+{
+ struct ffs_sb_fill_data *data = _data;
+ struct inode *inode;
+ struct ffs_data *ffs = data->ffs_data;
+
+ ENTER();
+
+ ffs->sb = sb;
+ data->ffs_data = NULL;
+ sb->s_fs_info = ffs;
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+ sb->s_magic = FUNCTIONFS_MAGIC;
+ sb->s_op = &ffs_sb_operations;
+ sb->s_time_gran = 1;
+
+ /* Root inode */
+ data->perms.mode = data->root_mode;
+ inode = ffs_sb_make_inode(sb, NULL,
+ &simple_dir_operations,
+ &simple_dir_inode_operations,
+ &data->perms);
+ sb->s_root = d_make_root(inode);
+ if (unlikely(!sb->s_root))
+ return -ENOMEM;
+
+ /* EP0 file */
+ if (unlikely(!ffs_sb_create_file(sb, "ep0", ffs,
+ &ffs_ep0_operations, NULL)))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int ffs_fs_parse_opts(struct ffs_sb_fill_data *data, char *opts)
+{
+ ENTER();
+
+ if (!opts || !*opts)
+ return 0;
+
+ for (;;) {
+ unsigned long value;
+ char *eq, *comma;
+
+ /* Option limit */
+ comma = strchr(opts, ',');
+ if (comma)
+ *comma = 0;
+
+ /* Value limit */
+ eq = strchr(opts, '=');
+ if (unlikely(!eq)) {
+ pr_err("'=' missing in %s\n", opts);
+ return -EINVAL;
+ }
+ *eq = 0;
+
+ /* Parse value */
+ if (kstrtoul(eq + 1, 0, &value)) {
+ pr_err("%s: invalid value: %s\n", opts, eq + 1);
+ return -EINVAL;
+ }
+
+ /* Interpret option */
+ switch (eq - opts) {
+ case 5:
+ if (!memcmp(opts, "rmode", 5))
+ data->root_mode = (value & 0555) | S_IFDIR;
+ else if (!memcmp(opts, "fmode", 5))
+ data->perms.mode = (value & 0666) | S_IFREG;
+ else
+ goto invalid;
+ break;
+
+ case 4:
+ if (!memcmp(opts, "mode", 4)) {
+ data->root_mode = (value & 0555) | S_IFDIR;
+ data->perms.mode = (value & 0666) | S_IFREG;
+ } else {
+ goto invalid;
+ }
+ break;
+
+ case 3:
+ if (!memcmp(opts, "uid", 3)) {
+ data->perms.uid = make_kuid(current_user_ns(), value);
+ if (!uid_valid(data->perms.uid)) {
+ pr_err("%s: unmapped value: %lu\n", opts, value);
+ return -EINVAL;
+ }
+ } else if (!memcmp(opts, "gid", 3)) {
+ data->perms.gid = make_kgid(current_user_ns(), value);
+ if (!gid_valid(data->perms.gid)) {
+ pr_err("%s: unmapped value: %lu\n", opts, value);
+ return -EINVAL;
+ }
+ } else {
+ goto invalid;
+ }
+ break;
+
+ default:
+invalid:
+ pr_err("%s: invalid option\n", opts);
+ return -EINVAL;
+ }
+
+ /* Next iteration */
+ if (!comma)
+ break;
+ opts = comma + 1;
+ }
+
+ return 0;
+}
+
+/* "mount -t functionfs dev_name /dev/function" ends up here */
+
+static struct dentry *
+ffs_fs_mount(struct file_system_type *t, int flags,
+ const char *dev_name, void *opts)
+{
+ struct ffs_sb_fill_data data = {
+ .perms = {
+ .mode = S_IFREG | 0600,
+ .uid = GLOBAL_ROOT_UID,
+ .gid = GLOBAL_ROOT_GID,
+ },
+ .root_mode = S_IFDIR | 0500,
+ };
+ struct dentry *rv;
+ int ret;
+ void *ffs_dev;
+ struct ffs_data *ffs;
+
+ ENTER();
+
+ ret = ffs_fs_parse_opts(&data, opts);
+ if (unlikely(ret < 0))
+ return ERR_PTR(ret);
+
+ ffs = ffs_data_new();
+ if (unlikely(!ffs))
+ return ERR_PTR(-ENOMEM);
+ ffs->file_perms = data.perms;
+
+ ffs->dev_name = kstrdup(dev_name, GFP_KERNEL);
+ if (unlikely(!ffs->dev_name)) {
+ ffs_data_put(ffs);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ ffs_dev = ffs_acquire_dev(dev_name);
+ if (IS_ERR(ffs_dev)) {
+ ffs_data_put(ffs);
+ return ERR_CAST(ffs_dev);
+ }
+ ffs->private_data = ffs_dev;
+ data.ffs_data = ffs;
+
+ rv = mount_nodev(t, flags, &data, ffs_sb_fill);
+ if (IS_ERR(rv) && data.ffs_data) {
+ ffs_release_dev(data.ffs_data);
+ ffs_data_put(data.ffs_data);
+ }
+ return rv;
+}
+
+static void
+ffs_fs_kill_sb(struct super_block *sb)
+{
+ ENTER();
+
+ kill_litter_super(sb);
+ if (sb->s_fs_info) {
+ ffs_release_dev(sb->s_fs_info);
+ ffs_data_put(sb->s_fs_info);
+ }
+}
+
+static struct file_system_type ffs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "functionfs",
+ .mount = ffs_fs_mount,
+ .kill_sb = ffs_fs_kill_sb,
+};
+MODULE_ALIAS_FS("functionfs");
+
+
+/* Driver's main init/cleanup functions *************************************/
+
+static int functionfs_init(void)
+{
+ int ret;
+
+ ENTER();
+
+ ret = register_filesystem(&ffs_fs_type);
+ if (likely(!ret))
+ pr_info("file system registered\n");
+ else
+ pr_err("failed registering file system (%d)\n", ret);
+
+ return ret;
+}
+
+static void functionfs_cleanup(void)
+{
+ ENTER();
+
+ pr_info("unloading\n");
+ unregister_filesystem(&ffs_fs_type);
+}
+
+
+/* ffs_data and ffs_function construction and destruction code **************/
+
+static void ffs_data_clear(struct ffs_data *ffs);
+static void ffs_data_reset(struct ffs_data *ffs);
+
+static void ffs_data_get(struct ffs_data *ffs)
+{
+ ENTER();
+
+ atomic_inc(&ffs->ref);
+}
+
+static void ffs_data_opened(struct ffs_data *ffs)
+{
+ ENTER();
+
+ atomic_inc(&ffs->ref);
+ atomic_inc(&ffs->opened);
+}
+
+static void ffs_data_put(struct ffs_data *ffs)
+{
+ ENTER();
+
+ if (unlikely(atomic_dec_and_test(&ffs->ref))) {
+ pr_info("%s(): freeing\n", __func__);
+ ffs_data_clear(ffs);
+ BUG_ON(waitqueue_active(&ffs->ev.waitq) ||
+ waitqueue_active(&ffs->ep0req_completion.wait));
+ kfree(ffs->dev_name);
+ kfree(ffs);
+ }
+}
+
+static void ffs_data_closed(struct ffs_data *ffs)
+{
+ ENTER();
+
+ if (atomic_dec_and_test(&ffs->opened)) {
+ ffs->state = FFS_CLOSING;
+ ffs_data_reset(ffs);
+ }
+
+ ffs_data_put(ffs);
+}
+
+static struct ffs_data *ffs_data_new(void)
+{
+ struct ffs_data *ffs = kzalloc(sizeof *ffs, GFP_KERNEL);
+ if (unlikely(!ffs))
+ return NULL;
+
+ ENTER();
+
+ atomic_set(&ffs->ref, 1);
+ atomic_set(&ffs->opened, 0);
+ ffs->state = FFS_READ_DESCRIPTORS;
+ mutex_init(&ffs->mutex);
+ spin_lock_init(&ffs->eps_lock);
+ init_waitqueue_head(&ffs->ev.waitq);
+ init_completion(&ffs->ep0req_completion);
+
+ /* XXX REVISIT need to update it in some places, or do we? */
+ ffs->ev.can_stall = 1;
+
+ return ffs;
+}
+
+static void ffs_data_clear(struct ffs_data *ffs)
+{
+ ENTER();
+
+ if (test_and_clear_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags))
+ ffs_closed(ffs);
+
+ BUG_ON(ffs->gadget);
+
+ if (ffs->epfiles)
+ ffs_epfiles_destroy(ffs->epfiles, ffs->eps_count);
+
+ kfree(ffs->raw_descs_data);
+ kfree(ffs->raw_strings);
+ kfree(ffs->stringtabs);
+}
+
+static void ffs_data_reset(struct ffs_data *ffs)
+{
+ ENTER();
+
+ ffs_data_clear(ffs);
+
+ ffs->epfiles = NULL;
+ ffs->raw_descs_data = NULL;
+ ffs->raw_descs = NULL;
+ ffs->raw_strings = NULL;
+ ffs->stringtabs = NULL;
+
+ ffs->raw_descs_length = 0;
+ ffs->fs_descs_count = 0;
+ ffs->hs_descs_count = 0;
+ ffs->ss_descs_count = 0;
+
+ ffs->strings_count = 0;
+ ffs->interfaces_count = 0;
+ ffs->eps_count = 0;
+
+ ffs->ev.count = 0;
+
+ ffs->state = FFS_READ_DESCRIPTORS;
+ ffs->setup_state = FFS_NO_SETUP;
+ ffs->flags = 0;
+}
+
+
+static int functionfs_bind(struct ffs_data *ffs, struct usb_composite_dev *cdev)
+{
+ struct usb_gadget_strings **lang;
+ int first_id;
+
+ ENTER();
+
+ if (WARN_ON(ffs->state != FFS_ACTIVE
+ || test_and_set_bit(FFS_FL_BOUND, &ffs->flags)))
+ return -EBADFD;
+
+ first_id = usb_string_ids_n(cdev, ffs->strings_count);
+ if (unlikely(first_id < 0))
+ return first_id;
+
+ ffs->ep0req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
+ if (unlikely(!ffs->ep0req))
+ return -ENOMEM;
+ ffs->ep0req->complete = ffs_ep0_complete;
+ ffs->ep0req->context = ffs;
+
+ lang = ffs->stringtabs;
+ for (lang = ffs->stringtabs; *lang; ++lang) {
+ struct usb_string *str = (*lang)->strings;
+ int id = first_id;
+ for (; str->s; ++id, ++str)
+ str->id = id;
+ }
+
+ ffs->gadget = cdev->gadget;
+ ffs_data_get(ffs);
+ return 0;
+}
+
+static void functionfs_unbind(struct ffs_data *ffs)
+{
+ ENTER();
+
+ if (!WARN_ON(!ffs->gadget)) {
+ usb_ep_free_request(ffs->gadget->ep0, ffs->ep0req);
+ ffs->ep0req = NULL;
+ ffs->gadget = NULL;
+ clear_bit(FFS_FL_BOUND, &ffs->flags);
+ ffs_data_put(ffs);
+ }
+}
+
+static int ffs_epfiles_create(struct ffs_data *ffs)
+{
+ struct ffs_epfile *epfile, *epfiles;
+ unsigned i, count;
+
+ ENTER();
+
+ count = ffs->eps_count;
+ epfiles = kcalloc(count, sizeof(*epfiles), GFP_KERNEL);
+ if (!epfiles)
+ return -ENOMEM;
+
+ epfile = epfiles;
+ for (i = 1; i <= count; ++i, ++epfile) {
+ epfile->ffs = ffs;
+ mutex_init(&epfile->mutex);
+ init_waitqueue_head(&epfile->wait);
+ sprintf(epfiles->name, "ep%u", i);
+ if (!unlikely(ffs_sb_create_file(ffs->sb, epfiles->name, epfile,
+ &ffs_epfile_operations,
+ &epfile->dentry))) {
+ ffs_epfiles_destroy(epfiles, i - 1);
+ return -ENOMEM;
+ }
+ }
+
+ ffs->epfiles = epfiles;
+ return 0;
+}
+
+static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count)
+{
+ struct ffs_epfile *epfile = epfiles;
+
+ ENTER();
+
+ for (; count; --count, ++epfile) {
+ BUG_ON(mutex_is_locked(&epfile->mutex) ||
+ waitqueue_active(&epfile->wait));
+ if (epfile->dentry) {
+ d_delete(epfile->dentry);
+ dput(epfile->dentry);
+ epfile->dentry = NULL;
+ }
+ }
+
+ kfree(epfiles);
+}
+
+
+static void ffs_func_eps_disable(struct ffs_function *func)
+{
+ struct ffs_ep *ep = func->eps;
+ struct ffs_epfile *epfile = func->ffs->epfiles;
+ unsigned count = func->ffs->eps_count;
+ unsigned long flags;
+
+ spin_lock_irqsave(&func->ffs->eps_lock, flags);
+ do {
+ /* pending requests get nuked */
+ if (likely(ep->ep))
+ usb_ep_disable(ep->ep);
+ epfile->ep = NULL;
+
+ ++ep;
+ ++epfile;
+ } while (--count);
+ spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
+}
+
+static int ffs_func_eps_enable(struct ffs_function *func)
+{
+ struct ffs_data *ffs = func->ffs;
+ struct ffs_ep *ep = func->eps;
+ struct ffs_epfile *epfile = ffs->epfiles;
+ unsigned count = ffs->eps_count;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&func->ffs->eps_lock, flags);
+ do {
+ struct usb_endpoint_descriptor *ds;
+ int desc_idx;
+
+ if (ffs->gadget->speed == USB_SPEED_SUPER)
+ desc_idx = 2;
+ else if (ffs->gadget->speed == USB_SPEED_HIGH)
+ desc_idx = 1;
+ else
+ desc_idx = 0;
+
+ /* fall-back to lower speed if desc missing for current speed */
+ do {
+ ds = ep->descs[desc_idx];
+ } while (!ds && --desc_idx >= 0);
+
+ if (!ds) {
+ ret = -EINVAL;
+ break;
+ }
+
+ ep->ep->driver_data = ep;
+ ep->ep->desc = ds;
+ ret = usb_ep_enable(ep->ep);
+ if (likely(!ret)) {
+ epfile->ep = ep;
+ epfile->in = usb_endpoint_dir_in(ds);
+ epfile->isoc = usb_endpoint_xfer_isoc(ds);
+ } else {
+ break;
+ }
+
+ wake_up(&epfile->wait);
+
+ ++ep;
+ ++epfile;
+ } while (--count);
+ spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
+
+ return ret;
+}
+
+
+/* Parsing and building descriptors and strings *****************************/
+
+/*
+ * This validates if data pointed by data is a valid USB descriptor as
+ * well as record how many interfaces, endpoints and strings are
+ * required by given configuration. Returns address after the
+ * descriptor or NULL if data is invalid.
+ */
+
+enum ffs_entity_type {
+ FFS_DESCRIPTOR, FFS_INTERFACE, FFS_STRING, FFS_ENDPOINT
+};
+
+enum ffs_os_desc_type {
+ FFS_OS_DESC, FFS_OS_DESC_EXT_COMPAT, FFS_OS_DESC_EXT_PROP
+};
+
+typedef int (*ffs_entity_callback)(enum ffs_entity_type entity,
+ u8 *valuep,
+ struct usb_descriptor_header *desc,
+ void *priv);
+
+typedef int (*ffs_os_desc_callback)(enum ffs_os_desc_type entity,
+ struct usb_os_desc_header *h, void *data,
+ unsigned len, void *priv);
+
+static int __must_check ffs_do_single_desc(char *data, unsigned len,
+ ffs_entity_callback entity,
+ void *priv)
+{
+ struct usb_descriptor_header *_ds = (void *)data;
+ u8 length;
+ int ret;
+
+ ENTER();
+
+ /* At least two bytes are required: length and type */
+ if (len < 2) {
+ pr_vdebug("descriptor too short\n");
+ return -EINVAL;
+ }
+
+ /* If we have at least as many bytes as the descriptor takes? */
+ length = _ds->bLength;
+ if (len < length) {
+ pr_vdebug("descriptor longer then available data\n");
+ return -EINVAL;
+ }
+
+#define __entity_check_INTERFACE(val) 1
+#define __entity_check_STRING(val) (val)
+#define __entity_check_ENDPOINT(val) ((val) & USB_ENDPOINT_NUMBER_MASK)
+#define __entity(type, val) do { \
+ pr_vdebug("entity " #type "(%02x)\n", (val)); \
+ if (unlikely(!__entity_check_ ##type(val))) { \
+ pr_vdebug("invalid entity's value\n"); \
+ return -EINVAL; \
+ } \
+ ret = entity(FFS_ ##type, &val, _ds, priv); \
+ if (unlikely(ret < 0)) { \
+ pr_debug("entity " #type "(%02x); ret = %d\n", \
+ (val), ret); \
+ return ret; \
+ } \
+ } while (0)
+
+ /* Parse descriptor depending on type. */
+ switch (_ds->bDescriptorType) {
+ case USB_DT_DEVICE:
+ case USB_DT_CONFIG:
+ case USB_DT_STRING:
+ case USB_DT_DEVICE_QUALIFIER:
+ /* function can't have any of those */
+ pr_vdebug("descriptor reserved for gadget: %d\n",
+ _ds->bDescriptorType);
+ return -EINVAL;
+
+ case USB_DT_INTERFACE: {
+ struct usb_interface_descriptor *ds = (void *)_ds;
+ pr_vdebug("interface descriptor\n");
+ if (length != sizeof *ds)
+ goto inv_length;
+
+ __entity(INTERFACE, ds->bInterfaceNumber);
+ if (ds->iInterface)
+ __entity(STRING, ds->iInterface);
+ }
+ break;
+
+ case USB_DT_ENDPOINT: {
+ struct usb_endpoint_descriptor *ds = (void *)_ds;
+ pr_vdebug("endpoint descriptor\n");
+ if (length != USB_DT_ENDPOINT_SIZE &&
+ length != USB_DT_ENDPOINT_AUDIO_SIZE)
+ goto inv_length;
+ __entity(ENDPOINT, ds->bEndpointAddress);
+ }
+ break;
+
+ case HID_DT_HID:
+ pr_vdebug("hid descriptor\n");
+ if (length != sizeof(struct hid_descriptor))
+ goto inv_length;
+ break;
+
+ case USB_DT_OTG:
+ if (length != sizeof(struct usb_otg_descriptor))
+ goto inv_length;
+ break;
+
+ case USB_DT_INTERFACE_ASSOCIATION: {
+ struct usb_interface_assoc_descriptor *ds = (void *)_ds;
+ pr_vdebug("interface association descriptor\n");
+ if (length != sizeof *ds)
+ goto inv_length;
+ if (ds->iFunction)
+ __entity(STRING, ds->iFunction);
+ }
+ break;
+
+ case USB_DT_SS_ENDPOINT_COMP:
+ pr_vdebug("EP SS companion descriptor\n");
+ if (length != sizeof(struct usb_ss_ep_comp_descriptor))
+ goto inv_length;
+ break;
+
+ case USB_DT_OTHER_SPEED_CONFIG:
+ case USB_DT_INTERFACE_POWER:
+ case USB_DT_DEBUG:
+ case USB_DT_SECURITY:
+ case USB_DT_CS_RADIO_CONTROL:
+ /* TODO */
+ pr_vdebug("unimplemented descriptor: %d\n", _ds->bDescriptorType);
+ return -EINVAL;
+
+ default:
+ /* We should never be here */
+ pr_vdebug("unknown descriptor: %d\n", _ds->bDescriptorType);
+ return -EINVAL;
+
+inv_length:
+ pr_vdebug("invalid length: %d (descriptor %d)\n",
+ _ds->bLength, _ds->bDescriptorType);
+ return -EINVAL;
+ }
+
+#undef __entity
+#undef __entity_check_DESCRIPTOR
+#undef __entity_check_INTERFACE
+#undef __entity_check_STRING
+#undef __entity_check_ENDPOINT
+
+ return length;
+}
+
+static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
+ ffs_entity_callback entity, void *priv)
+{
+ const unsigned _len = len;
+ unsigned long num = 0;
+
+ ENTER();
+
+ for (;;) {
+ int ret;
+
+ if (num == count)
+ data = NULL;
+
+ /* Record "descriptor" entity */
+ ret = entity(FFS_DESCRIPTOR, (u8 *)num, (void *)data, priv);
+ if (unlikely(ret < 0)) {
+ pr_debug("entity DESCRIPTOR(%02lx); ret = %d\n",
+ num, ret);
+ return ret;
+ }
+
+ if (!data)
+ return _len - len;
+
+ ret = ffs_do_single_desc(data, len, entity, priv);
+ if (unlikely(ret < 0)) {
+ pr_debug("%s returns %d\n", __func__, ret);
+ return ret;
+ }
+
+ len -= ret;
+ data += ret;
+ ++num;
+ }
+}
+
+static int __ffs_data_do_entity(enum ffs_entity_type type,
+ u8 *valuep, struct usb_descriptor_header *desc,
+ void *priv)
+{
+ struct ffs_data *ffs = priv;
+
+ ENTER();
+
+ switch (type) {
+ case FFS_DESCRIPTOR:
+ break;
+
+ case FFS_INTERFACE:
+ /*
+ * Interfaces are indexed from zero so if we
+ * encountered interface "n" then there are at least
+ * "n+1" interfaces.
+ */
+ if (*valuep >= ffs->interfaces_count)
+ ffs->interfaces_count = *valuep + 1;
+ break;
+
+ case FFS_STRING:
+ /*
+ * Strings are indexed from 1 (0 is magic ;) reserved
+ * for languages list or some such)
+ */
+ if (*valuep > ffs->strings_count)
+ ffs->strings_count = *valuep;
+ break;
+
+ case FFS_ENDPOINT:
+ /* Endpoints are indexed from 1 as well. */
+ if ((*valuep & USB_ENDPOINT_NUMBER_MASK) > ffs->eps_count)
+ ffs->eps_count = (*valuep & USB_ENDPOINT_NUMBER_MASK);
+ break;
+ }
+
+ return 0;
+}
+
+static int __ffs_do_os_desc_header(enum ffs_os_desc_type *next_type,
+ struct usb_os_desc_header *desc)
+{
+ u16 bcd_version = le16_to_cpu(desc->bcdVersion);
+ u16 w_index = le16_to_cpu(desc->wIndex);
+
+ if (bcd_version != 1) {
+ pr_vdebug("unsupported os descriptors version: %d",
+ bcd_version);
+ return -EINVAL;
+ }
+ switch (w_index) {
+ case 0x4:
+ *next_type = FFS_OS_DESC_EXT_COMPAT;
+ break;
+ case 0x5:
+ *next_type = FFS_OS_DESC_EXT_PROP;
+ break;
+ default:
+ pr_vdebug("unsupported os descriptor type: %d", w_index);
+ return -EINVAL;
+ }
+
+ return sizeof(*desc);
+}
+
+/*
+ * Process all extended compatibility/extended property descriptors
+ * of a feature descriptor
+ */
+static int __must_check ffs_do_single_os_desc(char *data, unsigned len,
+ enum ffs_os_desc_type type,
+ u16 feature_count,
+ ffs_os_desc_callback entity,
+ void *priv,
+ struct usb_os_desc_header *h)
+{
+ int ret;
+ const unsigned _len = len;
+
+ ENTER();
+
+ /* loop over all ext compat/ext prop descriptors */
+ while (feature_count--) {
+ ret = entity(type, h, data, len, priv);
+ if (unlikely(ret < 0)) {
+ pr_debug("bad OS descriptor, type: %d\n", type);
+ return ret;
+ }
+ data += ret;
+ len -= ret;
+ }
+ return _len - len;
+}
+
+/* Process a number of complete Feature Descriptors (Ext Compat or Ext Prop) */
+static int __must_check ffs_do_os_descs(unsigned count,
+ char *data, unsigned len,
+ ffs_os_desc_callback entity, void *priv)
+{
+ const unsigned _len = len;
+ unsigned long num = 0;
+
+ ENTER();
+
+ for (num = 0; num < count; ++num) {
+ int ret;
+ enum ffs_os_desc_type type;
+ u16 feature_count;
+ struct usb_os_desc_header *desc = (void *)data;
+
+ if (len < sizeof(*desc))
+ return -EINVAL;
+
+ /*
+ * Record "descriptor" entity.
+ * Process dwLength, bcdVersion, wIndex, get b/wCount.
+ * Move the data pointer to the beginning of extended
+ * compatibilities proper or extended properties proper
+ * portions of the data
+ */
+ if (le32_to_cpu(desc->dwLength) > len)
+ return -EINVAL;
+
+ ret = __ffs_do_os_desc_header(&type, desc);
+ if (unlikely(ret < 0)) {
+ pr_debug("entity OS_DESCRIPTOR(%02lx); ret = %d\n",
+ num, ret);
+ return ret;
+ }
+ /*
+ * 16-bit hex "?? 00" Little Endian looks like 8-bit hex "??"
+ */
+ feature_count = le16_to_cpu(desc->wCount);
+ if (type == FFS_OS_DESC_EXT_COMPAT &&
+ (feature_count > 255 || desc->Reserved))
+ return -EINVAL;
+ len -= ret;
+ data += ret;
+
+ /*
+ * Process all function/property descriptors
+ * of this Feature Descriptor
+ */
+ ret = ffs_do_single_os_desc(data, len, type,
+ feature_count, entity, priv, desc);
+ if (unlikely(ret < 0)) {
+ pr_debug("%s returns %d\n", __func__, ret);
+ return ret;
+ }
+
+ len -= ret;
+ data += ret;
+ }
+ return _len - len;
+}
+
+/**
+ * Validate contents of the buffer from userspace related to OS descriptors.
+ */
+static int __ffs_data_do_os_desc(enum ffs_os_desc_type type,
+ struct usb_os_desc_header *h, void *data,
+ unsigned len, void *priv)
+{
+ struct ffs_data *ffs = priv;
+ u8 length;
+
+ ENTER();
+
+ switch (type) {
+ case FFS_OS_DESC_EXT_COMPAT: {
+ struct usb_ext_compat_desc *d = data;
+ int i;
+
+ if (len < sizeof(*d) ||
+ d->bFirstInterfaceNumber >= ffs->interfaces_count ||
+ d->Reserved1)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(d->Reserved2); ++i)
+ if (d->Reserved2[i])
+ return -EINVAL;
+
+ length = sizeof(struct usb_ext_compat_desc);
+ }
+ break;
+ case FFS_OS_DESC_EXT_PROP: {
+ struct usb_ext_prop_desc *d = data;
+ u32 type, pdl;
+ u16 pnl;
+
+ if (len < sizeof(*d) || h->interface >= ffs->interfaces_count)
+ return -EINVAL;
+ length = le32_to_cpu(d->dwSize);
+ type = le32_to_cpu(d->dwPropertyDataType);
+ if (type < USB_EXT_PROP_UNICODE ||
+ type > USB_EXT_PROP_UNICODE_MULTI) {
+ pr_vdebug("unsupported os descriptor property type: %d",
+ type);
+ return -EINVAL;
+ }
+ pnl = le16_to_cpu(d->wPropertyNameLength);
+ pdl = le32_to_cpu(*(u32 *)((u8 *)data + 10 + pnl));
+ if (length != 14 + pnl + pdl) {
+ pr_vdebug("invalid os descriptor length: %d pnl:%d pdl:%d (descriptor %d)\n",
+ length, pnl, pdl, type);
+ return -EINVAL;
+ }
+ ++ffs->ms_os_descs_ext_prop_count;
+ /* property name reported to the host as "WCHAR"s */
+ ffs->ms_os_descs_ext_prop_name_len += pnl * 2;
+ ffs->ms_os_descs_ext_prop_data_len += pdl;
+ }
+ break;
+ default:
+ pr_vdebug("unknown descriptor: %d\n", type);
+ return -EINVAL;
+ }
+ return length;
+}
+
+static int __ffs_data_got_descs(struct ffs_data *ffs,
+ char *const _data, size_t len)
+{
+ char *data = _data, *raw_descs;
+ unsigned os_descs_count = 0, counts[3], flags;
+ int ret = -EINVAL, i;
+
+ ENTER();
+
+ if (get_unaligned_le32(data + 4) != len)
+ goto error;
+
+ switch (get_unaligned_le32(data)) {
+ case FUNCTIONFS_DESCRIPTORS_MAGIC:
+ flags = FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC;
+ data += 8;
+ len -= 8;
+ break;
+ case FUNCTIONFS_DESCRIPTORS_MAGIC_V2:
+ flags = get_unaligned_le32(data + 8);
+ if (flags & ~(FUNCTIONFS_HAS_FS_DESC |
+ FUNCTIONFS_HAS_HS_DESC |
+ FUNCTIONFS_HAS_SS_DESC |
+ FUNCTIONFS_HAS_MS_OS_DESC)) {
+ ret = -ENOSYS;
+ goto error;
+ }
+ data += 12;
+ len -= 12;
+ break;
+ default:
+ goto error;
+ }
+
+ /* Read fs_count, hs_count and ss_count (if present) */
+ for (i = 0; i < 3; ++i) {
+ if (!(flags & (1 << i))) {
+ counts[i] = 0;
+ } else if (len < 4) {
+ goto error;
+ } else {
+ counts[i] = get_unaligned_le32(data);
+ data += 4;
+ len -= 4;
+ }
+ }
+ if (flags & (1 << i)) {
+ os_descs_count = get_unaligned_le32(data);
+ data += 4;
+ len -= 4;
+ };
+
+ /* Read descriptors */
+ raw_descs = data;
+ for (i = 0; i < 3; ++i) {
+ if (!counts[i])
+ continue;
+ ret = ffs_do_descs(counts[i], data, len,
+ __ffs_data_do_entity, ffs);
+ if (ret < 0)
+ goto error;
+ data += ret;
+ len -= ret;
+ }
+ if (os_descs_count) {
+ ret = ffs_do_os_descs(os_descs_count, data, len,
+ __ffs_data_do_os_desc, ffs);
+ if (ret < 0)
+ goto error;
+ data += ret;
+ len -= ret;
+ }
+
+ if (raw_descs == data || len) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ ffs->raw_descs_data = _data;
+ ffs->raw_descs = raw_descs;
+ ffs->raw_descs_length = data - raw_descs;
+ ffs->fs_descs_count = counts[0];
+ ffs->hs_descs_count = counts[1];
+ ffs->ss_descs_count = counts[2];
+ ffs->ms_os_descs_count = os_descs_count;
+
+ return 0;
+
+error:
+ kfree(_data);
+ return ret;
+}
+
+static int __ffs_data_got_strings(struct ffs_data *ffs,
+ char *const _data, size_t len)
+{
+ u32 str_count, needed_count, lang_count;
+ struct usb_gadget_strings **stringtabs, *t;
+ struct usb_string *strings, *s;
+ const char *data = _data;
+
+ ENTER();
+
+ if (unlikely(get_unaligned_le32(data) != FUNCTIONFS_STRINGS_MAGIC ||
+ get_unaligned_le32(data + 4) != len))
+ goto error;
+ str_count = get_unaligned_le32(data + 8);
+ lang_count = get_unaligned_le32(data + 12);
+
+ /* if one is zero the other must be zero */
+ if (unlikely(!str_count != !lang_count))
+ goto error;
+
+ /* Do we have at least as many strings as descriptors need? */
+ needed_count = ffs->strings_count;
+ if (unlikely(str_count < needed_count))
+ goto error;
+
+ /*
+ * If we don't need any strings just return and free all
+ * memory.
+ */
+ if (!needed_count) {
+ kfree(_data);
+ return 0;
+ }
+
+ /* Allocate everything in one chunk so there's less maintenance. */
+ {
+ unsigned i = 0;
+ vla_group(d);
+ vla_item(d, struct usb_gadget_strings *, stringtabs,
+ lang_count + 1);
+ vla_item(d, struct usb_gadget_strings, stringtab, lang_count);
+ vla_item(d, struct usb_string, strings,
+ lang_count*(needed_count+1));
+
+ char *vlabuf = kmalloc(vla_group_size(d), GFP_KERNEL);
+
+ if (unlikely(!vlabuf)) {
+ kfree(_data);
+ return -ENOMEM;
+ }
+
+ /* Initialize the VLA pointers */
+ stringtabs = vla_ptr(vlabuf, d, stringtabs);
+ t = vla_ptr(vlabuf, d, stringtab);
+ i = lang_count;
+ do {
+ *stringtabs++ = t++;
+ } while (--i);
+ *stringtabs = NULL;
+
+ /* stringtabs = vlabuf = d_stringtabs for later kfree */
+ stringtabs = vla_ptr(vlabuf, d, stringtabs);
+ t = vla_ptr(vlabuf, d, stringtab);
+ s = vla_ptr(vlabuf, d, strings);
+ strings = s;
+ }
+
+ /* For each language */
+ data += 16;
+ len -= 16;
+
+ do { /* lang_count > 0 so we can use do-while */
+ unsigned needed = needed_count;
+
+ if (unlikely(len < 3))
+ goto error_free;
+ t->language = get_unaligned_le16(data);
+ t->strings = s;
+ ++t;
+
+ data += 2;
+ len -= 2;
+
+ /* For each string */
+ do { /* str_count > 0 so we can use do-while */
+ size_t length = strnlen(data, len);
+
+ if (unlikely(length == len))
+ goto error_free;
+
+ /*
+ * User may provide more strings then we need,
+ * if that's the case we simply ignore the
+ * rest
+ */
+ if (likely(needed)) {
+ /*
+ * s->id will be set while adding
+ * function to configuration so for
+ * now just leave garbage here.
+ */
+ s->s = data;
+ --needed;
+ ++s;
+ }
+
+ data += length + 1;
+ len -= length + 1;
+ } while (--str_count);
+
+ s->id = 0; /* terminator */
+ s->s = NULL;
+ ++s;
+
+ } while (--lang_count);
+
+ /* Some garbage left? */
+ if (unlikely(len))
+ goto error_free;
+
+ /* Done! */
+ ffs->stringtabs = stringtabs;
+ ffs->raw_strings = _data;
+
+ return 0;
+
+error_free:
+ kfree(stringtabs);
+error:
+ kfree(_data);
+ return -EINVAL;
+}
+
+
+/* Events handling and management *******************************************/
+
+static void __ffs_event_add(struct ffs_data *ffs,
+ enum usb_functionfs_event_type type)
+{
+ enum usb_functionfs_event_type rem_type1, rem_type2 = type;
+ int neg = 0;
+
+ /*
+ * Abort any unhandled setup
+ *
+ * We do not need to worry about some cmpxchg() changing value
+ * of ffs->setup_state without holding the lock because when
+ * state is FFS_SETUP_PENDING cmpxchg() in several places in
+ * the source does nothing.
+ */
+ if (ffs->setup_state == FFS_SETUP_PENDING)
+ ffs->setup_state = FFS_SETUP_CANCELLED;
+
+ switch (type) {
+ case FUNCTIONFS_RESUME:
+ rem_type2 = FUNCTIONFS_SUSPEND;
+ /* FALL THROUGH */
+ case FUNCTIONFS_SUSPEND:
+ case FUNCTIONFS_SETUP:
+ rem_type1 = type;
+ /* Discard all similar events */
+ break;
+
+ case FUNCTIONFS_BIND:
+ case FUNCTIONFS_UNBIND:
+ case FUNCTIONFS_DISABLE:
+ case FUNCTIONFS_ENABLE:
+ /* Discard everything other then power management. */
+ rem_type1 = FUNCTIONFS_SUSPEND;
+ rem_type2 = FUNCTIONFS_RESUME;
+ neg = 1;
+ break;
+
+ default:
+ BUG();
+ }
+
+ {
+ u8 *ev = ffs->ev.types, *out = ev;
+ unsigned n = ffs->ev.count;
+ for (; n; --n, ++ev)
+ if ((*ev == rem_type1 || *ev == rem_type2) == neg)
+ *out++ = *ev;
+ else
+ pr_vdebug("purging event %d\n", *ev);
+ ffs->ev.count = out - ffs->ev.types;
+ }
+
+ pr_vdebug("adding event %d\n", type);
+ ffs->ev.types[ffs->ev.count++] = type;
+ wake_up_locked(&ffs->ev.waitq);
+}
+
+static void ffs_event_add(struct ffs_data *ffs,
+ enum usb_functionfs_event_type type)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&ffs->ev.waitq.lock, flags);
+ __ffs_event_add(ffs, type);
+ spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
+}
+
+
+/* Bind/unbind USB function hooks *******************************************/
+
+static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
+ struct usb_descriptor_header *desc,
+ void *priv)
+{
+ struct usb_endpoint_descriptor *ds = (void *)desc;
+ struct ffs_function *func = priv;
+ struct ffs_ep *ffs_ep;
+ unsigned ep_desc_id, idx;
+ static const char *speed_names[] = { "full", "high", "super" };
+
+ if (type != FFS_DESCRIPTOR)
+ return 0;
+
+ /*
+ * If ss_descriptors is not NULL, we are reading super speed
+ * descriptors; if hs_descriptors is not NULL, we are reading high
+ * speed descriptors; otherwise, we are reading full speed
+ * descriptors.
+ */
+ if (func->function.ss_descriptors) {
+ ep_desc_id = 2;
+ func->function.ss_descriptors[(long)valuep] = desc;
+ } else if (func->function.hs_descriptors) {
+ ep_desc_id = 1;
+ func->function.hs_descriptors[(long)valuep] = desc;
+ } else {
+ ep_desc_id = 0;
+ func->function.fs_descriptors[(long)valuep] = desc;
+ }
+
+ if (!desc || desc->bDescriptorType != USB_DT_ENDPOINT)
+ return 0;
+
+ idx = (ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) - 1;
+ ffs_ep = func->eps + idx;
+
+ if (unlikely(ffs_ep->descs[ep_desc_id])) {
+ pr_err("two %sspeed descriptors for EP %d\n",
+ speed_names[ep_desc_id],
+ ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
+ return -EINVAL;
+ }
+ ffs_ep->descs[ep_desc_id] = ds;
+
+ ffs_dump_mem(": Original ep desc", ds, ds->bLength);
+ if (ffs_ep->ep) {
+ ds->bEndpointAddress = ffs_ep->descs[0]->bEndpointAddress;
+ if (!ds->wMaxPacketSize)
+ ds->wMaxPacketSize = ffs_ep->descs[0]->wMaxPacketSize;
+ } else {
+ struct usb_request *req;
+ struct usb_ep *ep;
+
+ pr_vdebug("autoconfig\n");
+ ep = usb_ep_autoconfig(func->gadget, ds);
+ if (unlikely(!ep))
+ return -ENOTSUPP;
+ ep->driver_data = func->eps + idx;
+
+ req = usb_ep_alloc_request(ep, GFP_KERNEL);
+ if (unlikely(!req))
+ return -ENOMEM;
+
+ ffs_ep->ep = ep;
+ ffs_ep->req = req;
+ func->eps_revmap[ds->bEndpointAddress &
+ USB_ENDPOINT_NUMBER_MASK] = idx + 1;
+ }
+ ffs_dump_mem(": Rewritten ep desc", ds, ds->bLength);
+
+ return 0;
+}
+
+static int __ffs_func_bind_do_nums(enum ffs_entity_type type, u8 *valuep,
+ struct usb_descriptor_header *desc,
+ void *priv)
+{
+ struct ffs_function *func = priv;
+ unsigned idx;
+ u8 newValue;
+
+ switch (type) {
+ default:
+ case FFS_DESCRIPTOR:
+ /* Handled in previous pass by __ffs_func_bind_do_descs() */
+ return 0;
+
+ case FFS_INTERFACE:
+ idx = *valuep;
+ if (func->interfaces_nums[idx] < 0) {
+ int id = usb_interface_id(func->conf, &func->function);
+ if (unlikely(id < 0))
+ return id;
+ func->interfaces_nums[idx] = id;
+ }
+ newValue = func->interfaces_nums[idx];
+ break;
+
+ case FFS_STRING:
+ /* String' IDs are allocated when fsf_data is bound to cdev */
+ newValue = func->ffs->stringtabs[0]->strings[*valuep - 1].id;
+ break;
+
+ case FFS_ENDPOINT:
+ /*
+ * USB_DT_ENDPOINT are handled in
+ * __ffs_func_bind_do_descs().
+ */
+ if (desc->bDescriptorType == USB_DT_ENDPOINT)
+ return 0;
+
+ idx = (*valuep & USB_ENDPOINT_NUMBER_MASK) - 1;
+ if (unlikely(!func->eps[idx].ep))
+ return -EINVAL;
+
+ {
+ struct usb_endpoint_descriptor **descs;
+ descs = func->eps[idx].descs;
+ newValue = descs[descs[0] ? 0 : 1]->bEndpointAddress;
+ }
+ break;
+ }
+
+ pr_vdebug("%02x -> %02x\n", *valuep, newValue);
+ *valuep = newValue;
+ return 0;
+}
+
+static int __ffs_func_bind_do_os_desc(enum ffs_os_desc_type type,
+ struct usb_os_desc_header *h, void *data,
+ unsigned len, void *priv)
+{
+ struct ffs_function *func = priv;
+ u8 length = 0;
+
+ switch (type) {
+ case FFS_OS_DESC_EXT_COMPAT: {
+ struct usb_ext_compat_desc *desc = data;
+ struct usb_os_desc_table *t;
+
+ t = &func->function.os_desc_table[desc->bFirstInterfaceNumber];
+ t->if_id = func->interfaces_nums[desc->bFirstInterfaceNumber];
+ memcpy(t->os_desc->ext_compat_id, &desc->CompatibleID,
+ ARRAY_SIZE(desc->CompatibleID) +
+ ARRAY_SIZE(desc->SubCompatibleID));
+ length = sizeof(*desc);
+ }
+ break;
+ case FFS_OS_DESC_EXT_PROP: {
+ struct usb_ext_prop_desc *desc = data;
+ struct usb_os_desc_table *t;
+ struct usb_os_desc_ext_prop *ext_prop;
+ char *ext_prop_name;
+ char *ext_prop_data;
+
+ t = &func->function.os_desc_table[h->interface];
+ t->if_id = func->interfaces_nums[h->interface];
+
+ ext_prop = func->ffs->ms_os_descs_ext_prop_avail;
+ func->ffs->ms_os_descs_ext_prop_avail += sizeof(*ext_prop);
+
+ ext_prop->type = le32_to_cpu(desc->dwPropertyDataType);
+ ext_prop->name_len = le16_to_cpu(desc->wPropertyNameLength);
+ ext_prop->data_len = le32_to_cpu(*(u32 *)
+ usb_ext_prop_data_len_ptr(data, ext_prop->name_len));
+ length = ext_prop->name_len + ext_prop->data_len + 14;
+
+ ext_prop_name = func->ffs->ms_os_descs_ext_prop_name_avail;
+ func->ffs->ms_os_descs_ext_prop_name_avail +=
+ ext_prop->name_len;
+
+ ext_prop_data = func->ffs->ms_os_descs_ext_prop_data_avail;
+ func->ffs->ms_os_descs_ext_prop_data_avail +=
+ ext_prop->data_len;
+ memcpy(ext_prop_data,
+ usb_ext_prop_data_ptr(data, ext_prop->name_len),
+ ext_prop->data_len);
+ /* unicode data reported to the host as "WCHAR"s */
+ switch (ext_prop->type) {
+ case USB_EXT_PROP_UNICODE:
+ case USB_EXT_PROP_UNICODE_ENV:
+ case USB_EXT_PROP_UNICODE_LINK:
+ case USB_EXT_PROP_UNICODE_MULTI:
+ ext_prop->data_len *= 2;
+ break;
+ }
+ ext_prop->data = ext_prop_data;
+
+ memcpy(ext_prop_name, usb_ext_prop_name_ptr(data),
+ ext_prop->name_len);
+ /* property name reported to the host as "WCHAR"s */
+ ext_prop->name_len *= 2;
+ ext_prop->name = ext_prop_name;
+
+ t->os_desc->ext_prop_len +=
+ ext_prop->name_len + ext_prop->data_len + 14;
+ ++t->os_desc->ext_prop_count;
+ list_add_tail(&ext_prop->entry, &t->os_desc->ext_prop);
+ }
+ break;
+ default:
+ pr_vdebug("unknown descriptor: %d\n", type);
+ }
+
+ return length;
+}
+
+static inline struct f_fs_opts *ffs_do_functionfs_bind(struct usb_function *f,
+ struct usb_configuration *c)
+{
+ struct ffs_function *func = ffs_func_from_usb(f);
+ struct f_fs_opts *ffs_opts =
+ container_of(f->fi, struct f_fs_opts, func_inst);
+ int ret;
+
+ ENTER();
+
+ /*
+ * Legacy gadget triggers binding in functionfs_ready_callback,
+ * which already uses locking; taking the same lock here would
+ * cause a deadlock.
+ *
+ * Configfs-enabled gadgets however do need ffs_dev_lock.
+ */
+ if (!ffs_opts->no_configfs)
+ ffs_dev_lock();
+ ret = ffs_opts->dev->desc_ready ? 0 : -ENODEV;
+ func->ffs = ffs_opts->dev->ffs_data;
+ if (!ffs_opts->no_configfs)
+ ffs_dev_unlock();
+ if (ret)
+ return ERR_PTR(ret);
+
+ func->conf = c;
+ func->gadget = c->cdev->gadget;
+
+ ffs_data_get(func->ffs);
+
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to ffs_opts->bound access
+ */
+ if (!ffs_opts->refcnt) {
+ ret = functionfs_bind(func->ffs, c->cdev);
+ if (ret)
+ return ERR_PTR(ret);
+ }
+ ffs_opts->refcnt++;
+ func->function.strings = func->ffs->stringtabs;
+
+ return ffs_opts;
+}
+
+static int _ffs_func_bind(struct usb_configuration *c,
+ struct usb_function *f)
+{
+ struct ffs_function *func = ffs_func_from_usb(f);
+ struct ffs_data *ffs = func->ffs;
+
+ const int full = !!func->ffs->fs_descs_count;
+ const int high = gadget_is_dualspeed(func->gadget) &&
+ func->ffs->hs_descs_count;
+ const int super = gadget_is_superspeed(func->gadget) &&
+ func->ffs->ss_descs_count;
+
+ int fs_len, hs_len, ss_len, ret, i;
+
+ /* Make it a single chunk, less management later on */
+ vla_group(d);
+ vla_item_with_sz(d, struct ffs_ep, eps, ffs->eps_count);
+ vla_item_with_sz(d, struct usb_descriptor_header *, fs_descs,
+ full ? ffs->fs_descs_count + 1 : 0);
+ vla_item_with_sz(d, struct usb_descriptor_header *, hs_descs,
+ high ? ffs->hs_descs_count + 1 : 0);
+ vla_item_with_sz(d, struct usb_descriptor_header *, ss_descs,
+ super ? ffs->ss_descs_count + 1 : 0);
+ vla_item_with_sz(d, short, inums, ffs->interfaces_count);
+ vla_item_with_sz(d, struct usb_os_desc_table, os_desc_table,
+ c->cdev->use_os_string ? ffs->interfaces_count : 0);
+ vla_item_with_sz(d, char[16], ext_compat,
+ c->cdev->use_os_string ? ffs->interfaces_count : 0);
+ vla_item_with_sz(d, struct usb_os_desc, os_desc,
+ c->cdev->use_os_string ? ffs->interfaces_count : 0);
+ vla_item_with_sz(d, struct usb_os_desc_ext_prop, ext_prop,
+ ffs->ms_os_descs_ext_prop_count);
+ vla_item_with_sz(d, char, ext_prop_name,
+ ffs->ms_os_descs_ext_prop_name_len);
+ vla_item_with_sz(d, char, ext_prop_data,
+ ffs->ms_os_descs_ext_prop_data_len);
+ vla_item_with_sz(d, char, raw_descs, ffs->raw_descs_length);
+ char *vlabuf;
+
+ ENTER();
+
+ /* Has descriptors only for speeds gadget does not support */
+ if (unlikely(!(full | high | super)))
+ return -ENOTSUPP;
+
+ /* Allocate a single chunk, less management later on */
+ vlabuf = kzalloc(vla_group_size(d), GFP_KERNEL);
+ if (unlikely(!vlabuf))
+ return -ENOMEM;
+
+ ffs->ms_os_descs_ext_prop_avail = vla_ptr(vlabuf, d, ext_prop);
+ ffs->ms_os_descs_ext_prop_name_avail =
+ vla_ptr(vlabuf, d, ext_prop_name);
+ ffs->ms_os_descs_ext_prop_data_avail =
+ vla_ptr(vlabuf, d, ext_prop_data);
+
+ /* Copy descriptors */
+ memcpy(vla_ptr(vlabuf, d, raw_descs), ffs->raw_descs,
+ ffs->raw_descs_length);
+
+ memset(vla_ptr(vlabuf, d, inums), 0xff, d_inums__sz);
+ for (ret = ffs->eps_count; ret; --ret) {
+ struct ffs_ep *ptr;
+
+ ptr = vla_ptr(vlabuf, d, eps);
+ ptr[ret].num = -1;
+ }
+
+ /* Save pointers
+ * d_eps == vlabuf, func->eps used to kfree vlabuf later
+ */
+ func->eps = vla_ptr(vlabuf, d, eps);
+ func->interfaces_nums = vla_ptr(vlabuf, d, inums);
+
+ /*
+ * Go through all the endpoint descriptors and allocate
+ * endpoints first, so that later we can rewrite the endpoint
+ * numbers without worrying that it may be described later on.
+ */
+ if (likely(full)) {
+ func->function.fs_descriptors = vla_ptr(vlabuf, d, fs_descs);
+ fs_len = ffs_do_descs(ffs->fs_descs_count,
+ vla_ptr(vlabuf, d, raw_descs),
+ d_raw_descs__sz,
+ __ffs_func_bind_do_descs, func);
+ if (unlikely(fs_len < 0)) {
+ ret = fs_len;
+ goto error;
+ }
+ } else {
+ fs_len = 0;
+ }
+
+ if (likely(high)) {
+ func->function.hs_descriptors = vla_ptr(vlabuf, d, hs_descs);
+ hs_len = ffs_do_descs(ffs->hs_descs_count,
+ vla_ptr(vlabuf, d, raw_descs) + fs_len,
+ d_raw_descs__sz - fs_len,
+ __ffs_func_bind_do_descs, func);
+ if (unlikely(hs_len < 0)) {
+ ret = hs_len;
+ goto error;
+ }
+ } else {
+ hs_len = 0;
+ }
+
+ if (likely(super)) {
+ func->function.ss_descriptors = vla_ptr(vlabuf, d, ss_descs);
+ ss_len = ffs_do_descs(ffs->ss_descs_count,
+ vla_ptr(vlabuf, d, raw_descs) + fs_len + hs_len,
+ d_raw_descs__sz - fs_len - hs_len,
+ __ffs_func_bind_do_descs, func);
+ if (unlikely(ss_len < 0)) {
+ ret = ss_len;
+ goto error;
+ }
+ } else {
+ ss_len = 0;
+ }
+
+ /*
+ * Now handle interface numbers allocation and interface and
+ * endpoint numbers rewriting. We can do that in one go
+ * now.
+ */
+ ret = ffs_do_descs(ffs->fs_descs_count +
+ (high ? ffs->hs_descs_count : 0) +
+ (super ? ffs->ss_descs_count : 0),
+ vla_ptr(vlabuf, d, raw_descs), d_raw_descs__sz,
+ __ffs_func_bind_do_nums, func);
+ if (unlikely(ret < 0))
+ goto error;
+
+ func->function.os_desc_table = vla_ptr(vlabuf, d, os_desc_table);
+ if (c->cdev->use_os_string)
+ for (i = 0; i < ffs->interfaces_count; ++i) {
+ struct usb_os_desc *desc;
+
+ desc = func->function.os_desc_table[i].os_desc =
+ vla_ptr(vlabuf, d, os_desc) +
+ i * sizeof(struct usb_os_desc);
+ desc->ext_compat_id =
+ vla_ptr(vlabuf, d, ext_compat) + i * 16;
+ INIT_LIST_HEAD(&desc->ext_prop);
+ }
+ ret = ffs_do_os_descs(ffs->ms_os_descs_count,
+ vla_ptr(vlabuf, d, raw_descs) +
+ fs_len + hs_len + ss_len,
+ d_raw_descs__sz - fs_len - hs_len - ss_len,
+ __ffs_func_bind_do_os_desc, func);
+ if (unlikely(ret < 0))
+ goto error;
+ func->function.os_desc_n =
+ c->cdev->use_os_string ? ffs->interfaces_count : 0;
+
+ /* And we're done */
+ ffs_event_add(ffs, FUNCTIONFS_BIND);
+ return 0;
+
+error:
+ /* XXX Do we need to release all claimed endpoints here? */
+ return ret;
+}
+
+static int ffs_func_bind(struct usb_configuration *c,
+ struct usb_function *f)
+{
+ struct f_fs_opts *ffs_opts = ffs_do_functionfs_bind(f, c);
+
+ if (IS_ERR(ffs_opts))
+ return PTR_ERR(ffs_opts);
+
+ return _ffs_func_bind(c, f);
+}
+
+
+/* Other USB function hooks *************************************************/
+
+static int ffs_func_set_alt(struct usb_function *f,
+ unsigned interface, unsigned alt)
+{
+ struct ffs_function *func = ffs_func_from_usb(f);
+ struct ffs_data *ffs = func->ffs;
+ int ret = 0, intf;
+
+ if (alt != (unsigned)-1) {
+ intf = ffs_func_revmap_intf(func, interface);
+ if (unlikely(intf < 0))
+ return intf;
+ }
+
+ if (ffs->func)
+ ffs_func_eps_disable(ffs->func);
+
+ if (ffs->state != FFS_ACTIVE)
+ return -ENODEV;
+
+ if (alt == (unsigned)-1) {
+ ffs->func = NULL;
+ ffs_event_add(ffs, FUNCTIONFS_DISABLE);
+ return 0;
+ }
+
+ ffs->func = func;
+ ret = ffs_func_eps_enable(func);
+ if (likely(ret >= 0))
+ ffs_event_add(ffs, FUNCTIONFS_ENABLE);
+ return ret;
+}
+
+static void ffs_func_disable(struct usb_function *f)
+{
+ ffs_func_set_alt(f, 0, (unsigned)-1);
+}
+
+static int ffs_func_setup(struct usb_function *f,
+ const struct usb_ctrlrequest *creq)
+{
+ struct ffs_function *func = ffs_func_from_usb(f);
+ struct ffs_data *ffs = func->ffs;
+ unsigned long flags;
+ int ret;
+
+ ENTER();
+
+ pr_vdebug("creq->bRequestType = %02x\n", creq->bRequestType);
+ pr_vdebug("creq->bRequest = %02x\n", creq->bRequest);
+ pr_vdebug("creq->wValue = %04x\n", le16_to_cpu(creq->wValue));
+ pr_vdebug("creq->wIndex = %04x\n", le16_to_cpu(creq->wIndex));
+ pr_vdebug("creq->wLength = %04x\n", le16_to_cpu(creq->wLength));
+
+ /*
+ * Most requests directed to interface go through here
+ * (notable exceptions are set/get interface) so we need to
+ * handle them. All other either handled by composite or
+ * passed to usb_configuration->setup() (if one is set). No
+ * matter, we will handle requests directed to endpoint here
+ * as well (as it's straightforward) but what to do with any
+ * other request?
+ */
+ if (ffs->state != FFS_ACTIVE)
+ return -ENODEV;
+
+ switch (creq->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_INTERFACE:
+ ret = ffs_func_revmap_intf(func, le16_to_cpu(creq->wIndex));
+ if (unlikely(ret < 0))
+ return ret;
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ ret = ffs_func_revmap_ep(func, le16_to_cpu(creq->wIndex));
+ if (unlikely(ret < 0))
+ return ret;
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ spin_lock_irqsave(&ffs->ev.waitq.lock, flags);
+ ffs->ev.setup = *creq;
+ ffs->ev.setup.wIndex = cpu_to_le16(ret);
+ __ffs_event_add(ffs, FUNCTIONFS_SETUP);
+ spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
+
+ return 0;
+}
+
+static void ffs_func_suspend(struct usb_function *f)
+{
+ ENTER();
+ ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_SUSPEND);
+}
+
+static void ffs_func_resume(struct usb_function *f)
+{
+ ENTER();
+ ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_RESUME);
+}
+
+
+/* Endpoint and interface numbers reverse mapping ***************************/
+
+static int ffs_func_revmap_ep(struct ffs_function *func, u8 num)
+{
+ num = func->eps_revmap[num & USB_ENDPOINT_NUMBER_MASK];
+ return num ? num : -EDOM;
+}
+
+static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf)
+{
+ short *nums = func->interfaces_nums;
+ unsigned count = func->ffs->interfaces_count;
+
+ for (; count; --count, ++nums) {
+ if (*nums >= 0 && *nums == intf)
+ return nums - func->interfaces_nums;
+ }
+
+ return -EDOM;
+}
+
+
+/* Devices management *******************************************************/
+
+static LIST_HEAD(ffs_devices);
+
+static struct ffs_dev *_ffs_do_find_dev(const char *name)
+{
+ struct ffs_dev *dev;
+
+ list_for_each_entry(dev, &ffs_devices, entry) {
+ if (!dev->name || !name)
+ continue;
+ if (strcmp(dev->name, name) == 0)
+ return dev;
+ }
+
+ return NULL;
+}
+
+/*
+ * ffs_lock must be taken by the caller of this function
+ */
+static struct ffs_dev *_ffs_get_single_dev(void)
+{
+ struct ffs_dev *dev;
+
+ if (list_is_singular(&ffs_devices)) {
+ dev = list_first_entry(&ffs_devices, struct ffs_dev, entry);
+ if (dev->single)
+ return dev;
+ }
+
+ return NULL;
+}
+
+/*
+ * ffs_lock must be taken by the caller of this function
+ */
+static struct ffs_dev *_ffs_find_dev(const char *name)
+{
+ struct ffs_dev *dev;
+
+ dev = _ffs_get_single_dev();
+ if (dev)
+ return dev;
+
+ return _ffs_do_find_dev(name);
+}
+
+/* Configfs support *********************************************************/
+
+static inline struct f_fs_opts *to_ffs_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_fs_opts,
+ func_inst.group);
+}
+
+static void ffs_attr_release(struct config_item *item)
+{
+ struct f_fs_opts *opts = to_ffs_opts(item);
+
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations ffs_item_ops = {
+ .release = ffs_attr_release,
+};
+
+static struct config_item_type ffs_func_type = {
+ .ct_item_ops = &ffs_item_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+
+/* Function registration interface ******************************************/
+
+static void ffs_free_inst(struct usb_function_instance *f)
+{
+ struct f_fs_opts *opts;
+
+ opts = to_f_fs_opts(f);
+ ffs_dev_lock();
+ _ffs_free_dev(opts->dev);
+ ffs_dev_unlock();
+ kfree(opts);
+}
+
+#define MAX_INST_NAME_LEN 40
+
+static int ffs_set_inst_name(struct usb_function_instance *fi, const char *name)
+{
+ struct f_fs_opts *opts;
+ char *ptr;
+ const char *tmp;
+ int name_len, ret;
+
+ name_len = strlen(name) + 1;
+ if (name_len > MAX_INST_NAME_LEN)
+ return -ENAMETOOLONG;
+
+ ptr = kstrndup(name, name_len, GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ opts = to_f_fs_opts(fi);
+ tmp = NULL;
+
+ ffs_dev_lock();
+
+ tmp = opts->dev->name_allocated ? opts->dev->name : NULL;
+ ret = _ffs_name_dev(opts->dev, ptr);
+ if (ret) {
+ kfree(ptr);
+ ffs_dev_unlock();
+ return ret;
+ }
+ opts->dev->name_allocated = true;
+
+ ffs_dev_unlock();
+
+ kfree(tmp);
+
+ return 0;
+}
+
+static struct usb_function_instance *ffs_alloc_inst(void)
+{
+ struct f_fs_opts *opts;
+ struct ffs_dev *dev;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.set_inst_name = ffs_set_inst_name;
+ opts->func_inst.free_func_inst = ffs_free_inst;
+ ffs_dev_lock();
+ dev = _ffs_alloc_dev();
+ ffs_dev_unlock();
+ if (IS_ERR(dev)) {
+ kfree(opts);
+ return ERR_CAST(dev);
+ }
+ opts->dev = dev;
+ dev->opts = opts;
+
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &ffs_func_type);
+ return &opts->func_inst;
+}
+
+static void ffs_free(struct usb_function *f)
+{
+ kfree(ffs_func_from_usb(f));
+}
+
+static void ffs_func_unbind(struct usb_configuration *c,
+ struct usb_function *f)
+{
+ struct ffs_function *func = ffs_func_from_usb(f);
+ struct ffs_data *ffs = func->ffs;
+ struct f_fs_opts *opts =
+ container_of(f->fi, struct f_fs_opts, func_inst);
+ struct ffs_ep *ep = func->eps;
+ unsigned count = ffs->eps_count;
+ unsigned long flags;
+
+ ENTER();
+ if (ffs->func == func) {
+ ffs_func_eps_disable(func);
+ ffs->func = NULL;
+ }
+
+ if (!--opts->refcnt)
+ functionfs_unbind(ffs);
+
+ /* cleanup after autoconfig */
+ spin_lock_irqsave(&func->ffs->eps_lock, flags);
+ do {
+ if (ep->ep && ep->req)
+ usb_ep_free_request(ep->ep, ep->req);
+ ep->req = NULL;
+ ++ep;
+ } while (--count);
+ spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
+ kfree(func->eps);
+ func->eps = NULL;
+ /*
+ * eps, descriptors and interfaces_nums are allocated in the
+ * same chunk so only one free is required.
+ */
+ func->function.fs_descriptors = NULL;
+ func->function.hs_descriptors = NULL;
+ func->function.ss_descriptors = NULL;
+ func->interfaces_nums = NULL;
+
+ ffs_event_add(ffs, FUNCTIONFS_UNBIND);
+}
+
+static struct usb_function *ffs_alloc(struct usb_function_instance *fi)
+{
+ struct ffs_function *func;
+
+ ENTER();
+
+ func = kzalloc(sizeof(*func), GFP_KERNEL);
+ if (unlikely(!func))
+ return ERR_PTR(-ENOMEM);
+
+ func->function.name = "Function FS Gadget";
+
+ func->function.bind = ffs_func_bind;
+ func->function.unbind = ffs_func_unbind;
+ func->function.set_alt = ffs_func_set_alt;
+ func->function.disable = ffs_func_disable;
+ func->function.setup = ffs_func_setup;
+ func->function.suspend = ffs_func_suspend;
+ func->function.resume = ffs_func_resume;
+ func->function.free_func = ffs_free;
+
+ return &func->function;
+}
+
+/*
+ * ffs_lock must be taken by the caller of this function
+ */
+static struct ffs_dev *_ffs_alloc_dev(void)
+{
+ struct ffs_dev *dev;
+ int ret;
+
+ if (_ffs_get_single_dev())
+ return ERR_PTR(-EBUSY);
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ if (list_empty(&ffs_devices)) {
+ ret = functionfs_init();
+ if (ret) {
+ kfree(dev);
+ return ERR_PTR(ret);
+ }
+ }
+
+ list_add(&dev->entry, &ffs_devices);
+
+ return dev;
+}
+
+/*
+ * ffs_lock must be taken by the caller of this function
+ * The caller is responsible for "name" being available whenever f_fs needs it
+ */
+static int _ffs_name_dev(struct ffs_dev *dev, const char *name)
+{
+ struct ffs_dev *existing;
+
+ existing = _ffs_do_find_dev(name);
+ if (existing)
+ return -EBUSY;
+
+ dev->name = name;
+
+ return 0;
+}
+
+/*
+ * The caller is responsible for "name" being available whenever f_fs needs it
+ */
+int ffs_name_dev(struct ffs_dev *dev, const char *name)
+{
+ int ret;
+
+ ffs_dev_lock();
+ ret = _ffs_name_dev(dev, name);
+ ffs_dev_unlock();
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ffs_name_dev);
+
+int ffs_single_dev(struct ffs_dev *dev)
+{
+ int ret;
+
+ ret = 0;
+ ffs_dev_lock();
+
+ if (!list_is_singular(&ffs_devices))
+ ret = -EBUSY;
+ else
+ dev->single = true;
+
+ ffs_dev_unlock();
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ffs_single_dev);
+
+/*
+ * ffs_lock must be taken by the caller of this function
+ */
+static void _ffs_free_dev(struct ffs_dev *dev)
+{
+ list_del(&dev->entry);
+ if (dev->name_allocated)
+ kfree(dev->name);
+ kfree(dev);
+ if (list_empty(&ffs_devices))
+ functionfs_cleanup();
+}
+
+static void *ffs_acquire_dev(const char *dev_name)
+{
+ struct ffs_dev *ffs_dev;
+
+ ENTER();
+ ffs_dev_lock();
+
+ ffs_dev = _ffs_find_dev(dev_name);
+ if (!ffs_dev)
+ ffs_dev = ERR_PTR(-ENOENT);
+ else if (ffs_dev->mounted)
+ ffs_dev = ERR_PTR(-EBUSY);
+ else if (ffs_dev->ffs_acquire_dev_callback &&
+ ffs_dev->ffs_acquire_dev_callback(ffs_dev))
+ ffs_dev = ERR_PTR(-ENOENT);
+ else
+ ffs_dev->mounted = true;
+
+ ffs_dev_unlock();
+ return ffs_dev;
+}
+
+static void ffs_release_dev(struct ffs_data *ffs_data)
+{
+ struct ffs_dev *ffs_dev;
+
+ ENTER();
+ ffs_dev_lock();
+
+ ffs_dev = ffs_data->private_data;
+ if (ffs_dev) {
+ ffs_dev->mounted = false;
+
+ if (ffs_dev->ffs_release_dev_callback)
+ ffs_dev->ffs_release_dev_callback(ffs_dev);
+ }
+
+ ffs_dev_unlock();
+}
+
+static int ffs_ready(struct ffs_data *ffs)
+{
+ struct ffs_dev *ffs_obj;
+ int ret = 0;
+
+ ENTER();
+ ffs_dev_lock();
+
+ ffs_obj = ffs->private_data;
+ if (!ffs_obj) {
+ ret = -EINVAL;
+ goto done;
+ }
+ if (WARN_ON(ffs_obj->desc_ready)) {
+ ret = -EBUSY;
+ goto done;
+ }
+
+ ffs_obj->desc_ready = true;
+ ffs_obj->ffs_data = ffs;
+
+ if (ffs_obj->ffs_ready_callback)
+ ret = ffs_obj->ffs_ready_callback(ffs);
+
+done:
+ ffs_dev_unlock();
+ return ret;
+}
+
+static void ffs_closed(struct ffs_data *ffs)
+{
+ struct ffs_dev *ffs_obj;
+
+ ENTER();
+ ffs_dev_lock();
+
+ ffs_obj = ffs->private_data;
+ if (!ffs_obj)
+ goto done;
+
+ ffs_obj->desc_ready = false;
+
+ if (ffs_obj->ffs_closed_callback)
+ ffs_obj->ffs_closed_callback(ffs);
+
+ if (!ffs_obj->opts || ffs_obj->opts->no_configfs
+ || !ffs_obj->opts->func_inst.group.cg_item.ci_parent)
+ goto done;
+
+ unregister_gadget_item(ffs_obj->opts->
+ func_inst.group.cg_item.ci_parent->ci_parent);
+done:
+ ffs_dev_unlock();
+}
+
+/* Misc helper functions ****************************************************/
+
+static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
+{
+ return nonblock
+ ? likely(mutex_trylock(mutex)) ? 0 : -EAGAIN
+ : mutex_lock_interruptible(mutex);
+}
+
+static char *ffs_prepare_buffer(const char __user *buf, size_t len)
+{
+ char *data;
+
+ if (unlikely(!len))
+ return NULL;
+
+ data = kmalloc(len, GFP_KERNEL);
+ if (unlikely(!data))
+ return ERR_PTR(-ENOMEM);
+
+ if (unlikely(__copy_from_user(data, buf, len))) {
+ kfree(data);
+ return ERR_PTR(-EFAULT);
+ }
+
+ pr_vdebug("Buffer from user space:\n");
+ ffs_dump_mem("", data, len);
+
+ return data;
+}
+
+DECLARE_USB_FUNCTION_INIT(ffs, ffs_alloc_inst, ffs_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Nazarewicz");
--- /dev/null
+/*
+ * f_hid.c -- USB HID function driver
+ *
+ * Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@barco.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/hid.h>
+#include <linux/cdev.h>
+#include <linux/mutex.h>
+#include <linux/poll.h>
+#include <linux/uaccess.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/usb/g_hid.h>
+
+#include "u_f.h"
+
+static int major, minors;
+static struct class *hidg_class;
+
+/*-------------------------------------------------------------------------*/
+/* HID gadget struct */
+
+struct f_hidg_req_list {
+ struct usb_request *req;
+ unsigned int pos;
+ struct list_head list;
+};
+
+struct f_hidg {
+ /* configuration */
+ unsigned char bInterfaceSubClass;
+ unsigned char bInterfaceProtocol;
+ unsigned short report_desc_length;
+ char *report_desc;
+ unsigned short report_length;
+
+ /* recv report */
+ struct list_head completed_out_req;
+ spinlock_t spinlock;
+ wait_queue_head_t read_queue;
+ unsigned int qlen;
+
+ /* send report */
+ struct mutex lock;
+ bool write_pending;
+ wait_queue_head_t write_queue;
+ struct usb_request *req;
+
+ int minor;
+ struct cdev cdev;
+ struct usb_function func;
+
+ struct usb_ep *in_ep;
+ struct usb_ep *out_ep;
+};
+
+static inline struct f_hidg *func_to_hidg(struct usb_function *f)
+{
+ return container_of(f, struct f_hidg, func);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Static descriptors */
+
+static struct usb_interface_descriptor hidg_interface_desc = {
+ .bLength = sizeof hidg_interface_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+ /* .bInterfaceNumber = DYNAMIC */
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_HID,
+ /* .bInterfaceSubClass = DYNAMIC */
+ /* .bInterfaceProtocol = DYNAMIC */
+ /* .iInterface = DYNAMIC */
+};
+
+static struct hid_descriptor hidg_desc = {
+ .bLength = sizeof hidg_desc,
+ .bDescriptorType = HID_DT_HID,
+ .bcdHID = 0x0101,
+ .bCountryCode = 0x00,
+ .bNumDescriptors = 0x1,
+ /*.desc[0].bDescriptorType = DYNAMIC */
+ /*.desc[0].wDescriptorLenght = DYNAMIC */
+};
+
+/* High-Speed Support */
+
+static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ /*.wMaxPacketSize = DYNAMIC */
+ .bInterval = 4, /* FIXME: Add this field in the
+ * HID gadget configuration?
+ * (struct hidg_func_descriptor)
+ */
+};
+
+static struct usb_endpoint_descriptor hidg_hs_out_ep_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ /*.wMaxPacketSize = DYNAMIC */
+ .bInterval = 4, /* FIXME: Add this field in the
+ * HID gadget configuration?
+ * (struct hidg_func_descriptor)
+ */
+};
+
+static struct usb_descriptor_header *hidg_hs_descriptors[] = {
+ (struct usb_descriptor_header *)&hidg_interface_desc,
+ (struct usb_descriptor_header *)&hidg_desc,
+ (struct usb_descriptor_header *)&hidg_hs_in_ep_desc,
+ (struct usb_descriptor_header *)&hidg_hs_out_ep_desc,
+ NULL,
+};
+
+/* Full-Speed Support */
+
+static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ /*.wMaxPacketSize = DYNAMIC */
+ .bInterval = 10, /* FIXME: Add this field in the
+ * HID gadget configuration?
+ * (struct hidg_func_descriptor)
+ */
+};
+
+static struct usb_endpoint_descriptor hidg_fs_out_ep_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ /*.wMaxPacketSize = DYNAMIC */
+ .bInterval = 10, /* FIXME: Add this field in the
+ * HID gadget configuration?
+ * (struct hidg_func_descriptor)
+ */
+};
+
+static struct usb_descriptor_header *hidg_fs_descriptors[] = {
+ (struct usb_descriptor_header *)&hidg_interface_desc,
+ (struct usb_descriptor_header *)&hidg_desc,
+ (struct usb_descriptor_header *)&hidg_fs_in_ep_desc,
+ (struct usb_descriptor_header *)&hidg_fs_out_ep_desc,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+/* Char Device */
+
+static ssize_t f_hidg_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ptr)
+{
+ struct f_hidg *hidg = file->private_data;
+ struct f_hidg_req_list *list;
+ struct usb_request *req;
+ unsigned long flags;
+ int ret;
+
+ if (!count)
+ return 0;
+
+ if (!access_ok(VERIFY_WRITE, buffer, count))
+ return -EFAULT;
+
+ spin_lock_irqsave(&hidg->spinlock, flags);
+
+#define READ_COND (!list_empty(&hidg->completed_out_req))
+
+ /* wait for at least one buffer to complete */
+ while (!READ_COND) {
+ spin_unlock_irqrestore(&hidg->spinlock, flags);
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ if (wait_event_interruptible(hidg->read_queue, READ_COND))
+ return -ERESTARTSYS;
+
+ spin_lock_irqsave(&hidg->spinlock, flags);
+ }
+
+ /* pick the first one */
+ list = list_first_entry(&hidg->completed_out_req,
+ struct f_hidg_req_list, list);
+ req = list->req;
+ count = min_t(unsigned int, count, req->actual - list->pos);
+ spin_unlock_irqrestore(&hidg->spinlock, flags);
+
+ /* copy to user outside spinlock */
+ count -= copy_to_user(buffer, req->buf + list->pos, count);
+ list->pos += count;
+
+ /*
+ * if this request is completely handled and transfered to
+ * userspace, remove its entry from the list and requeue it
+ * again. Otherwise, we will revisit it again upon the next
+ * call, taking into account its current read position.
+ */
+ if (list->pos == req->actual) {
+ spin_lock_irqsave(&hidg->spinlock, flags);
+ list_del(&list->list);
+ kfree(list);
+ spin_unlock_irqrestore(&hidg->spinlock, flags);
+
+ req->length = hidg->report_length;
+ ret = usb_ep_queue(hidg->out_ep, req, GFP_KERNEL);
+ if (ret < 0)
+ return ret;
+ }
+
+ return count;
+}
+
+static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_hidg *hidg = (struct f_hidg *)ep->driver_data;
+
+ if (req->status != 0) {
+ ERROR(hidg->func.config->cdev,
+ "End Point Request ERROR: %d\n", req->status);
+ }
+
+ hidg->write_pending = 0;
+ wake_up(&hidg->write_queue);
+}
+
+static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *offp)
+{
+ struct f_hidg *hidg = file->private_data;
+ ssize_t status = -ENOMEM;
+
+ if (!access_ok(VERIFY_READ, buffer, count))
+ return -EFAULT;
+
+ mutex_lock(&hidg->lock);
+
+#define WRITE_COND (!hidg->write_pending)
+
+ /* write queue */
+ while (!WRITE_COND) {
+ mutex_unlock(&hidg->lock);
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ if (wait_event_interruptible_exclusive(
+ hidg->write_queue, WRITE_COND))
+ return -ERESTARTSYS;
+
+ mutex_lock(&hidg->lock);
+ }
+
+ count = min_t(unsigned, count, hidg->report_length);
+ status = copy_from_user(hidg->req->buf, buffer, count);
+
+ if (status != 0) {
+ ERROR(hidg->func.config->cdev,
+ "copy_from_user error\n");
+ mutex_unlock(&hidg->lock);
+ return -EINVAL;
+ }
+
+ hidg->req->status = 0;
+ hidg->req->zero = 0;
+ hidg->req->length = count;
+ hidg->req->complete = f_hidg_req_complete;
+ hidg->req->context = hidg;
+ hidg->write_pending = 1;
+
+ status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
+ if (status < 0) {
+ ERROR(hidg->func.config->cdev,
+ "usb_ep_queue error on int endpoint %zd\n", status);
+ hidg->write_pending = 0;
+ wake_up(&hidg->write_queue);
+ } else {
+ status = count;
+ }
+
+ mutex_unlock(&hidg->lock);
+
+ return status;
+}
+
+static unsigned int f_hidg_poll(struct file *file, poll_table *wait)
+{
+ struct f_hidg *hidg = file->private_data;
+ unsigned int ret = 0;
+
+ poll_wait(file, &hidg->read_queue, wait);
+ poll_wait(file, &hidg->write_queue, wait);
+
+ if (WRITE_COND)
+ ret |= POLLOUT | POLLWRNORM;
+
+ if (READ_COND)
+ ret |= POLLIN | POLLRDNORM;
+
+ return ret;
+}
+
+#undef WRITE_COND
+#undef READ_COND
+
+static int f_hidg_release(struct inode *inode, struct file *fd)
+{
+ fd->private_data = NULL;
+ return 0;
+}
+
+static int f_hidg_open(struct inode *inode, struct file *fd)
+{
+ struct f_hidg *hidg =
+ container_of(inode->i_cdev, struct f_hidg, cdev);
+
+ fd->private_data = hidg;
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+/* usb_function */
+
+static inline struct usb_request *hidg_alloc_ep_req(struct usb_ep *ep,
+ unsigned length)
+{
+ return alloc_ep_req(ep, length, length);
+}
+
+static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_hidg *hidg = (struct f_hidg *) req->context;
+ struct f_hidg_req_list *req_list;
+ unsigned long flags;
+
+ req_list = kzalloc(sizeof(*req_list), GFP_ATOMIC);
+ if (!req_list)
+ return;
+
+ req_list->req = req;
+
+ spin_lock_irqsave(&hidg->spinlock, flags);
+ list_add_tail(&req_list->list, &hidg->completed_out_req);
+ spin_unlock_irqrestore(&hidg->spinlock, flags);
+
+ wake_up(&hidg->read_queue);
+}
+
+static int hidg_setup(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct f_hidg *hidg = func_to_hidg(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int status = 0;
+ __u16 value, length;
+
+ value = __le16_to_cpu(ctrl->wValue);
+ length = __le16_to_cpu(ctrl->wLength);
+
+ VDBG(cdev, "hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x "
+ "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value);
+
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
+ | HID_REQ_GET_REPORT):
+ VDBG(cdev, "get_report\n");
+
+ /* send an empty report */
+ length = min_t(unsigned, length, hidg->report_length);
+ memset(req->buf, 0x0, length);
+
+ goto respond;
+ break;
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
+ | HID_REQ_GET_PROTOCOL):
+ VDBG(cdev, "get_protocol\n");
+ goto stall;
+ break;
+
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
+ | HID_REQ_SET_REPORT):
+ VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
+ goto stall;
+ break;
+
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
+ | HID_REQ_SET_PROTOCOL):
+ VDBG(cdev, "set_protocol\n");
+ goto stall;
+ break;
+
+ case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
+ | USB_REQ_GET_DESCRIPTOR):
+ switch (value >> 8) {
+ case HID_DT_HID:
+ VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: HID\n");
+ length = min_t(unsigned short, length,
+ hidg_desc.bLength);
+ memcpy(req->buf, &hidg_desc, length);
+ goto respond;
+ break;
+ case HID_DT_REPORT:
+ VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
+ length = min_t(unsigned short, length,
+ hidg->report_desc_length);
+ memcpy(req->buf, hidg->report_desc, length);
+ goto respond;
+ break;
+
+ default:
+ VDBG(cdev, "Unknown descriptor request 0x%x\n",
+ value >> 8);
+ goto stall;
+ break;
+ }
+ break;
+
+ default:
+ VDBG(cdev, "Unknown request 0x%x\n",
+ ctrl->bRequest);
+ goto stall;
+ break;
+ }
+
+stall:
+ return -EOPNOTSUPP;
+
+respond:
+ req->zero = 0;
+ req->length = length;
+ status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (status < 0)
+ ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value);
+ return status;
+}
+
+static void hidg_disable(struct usb_function *f)
+{
+ struct f_hidg *hidg = func_to_hidg(f);
+ struct f_hidg_req_list *list, *next;
+
+ usb_ep_disable(hidg->in_ep);
+ hidg->in_ep->driver_data = NULL;
+
+ usb_ep_disable(hidg->out_ep);
+ hidg->out_ep->driver_data = NULL;
+
+ list_for_each_entry_safe(list, next, &hidg->completed_out_req, list) {
+ list_del(&list->list);
+ kfree(list);
+ }
+}
+
+static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct f_hidg *hidg = func_to_hidg(f);
+ int i, status = 0;
+
+ VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt);
+
+ if (hidg->in_ep != NULL) {
+ /* restart endpoint */
+ if (hidg->in_ep->driver_data != NULL)
+ usb_ep_disable(hidg->in_ep);
+
+ status = config_ep_by_speed(f->config->cdev->gadget, f,
+ hidg->in_ep);
+ if (status) {
+ ERROR(cdev, "config_ep_by_speed FAILED!\n");
+ goto fail;
+ }
+ status = usb_ep_enable(hidg->in_ep);
+ if (status < 0) {
+ ERROR(cdev, "Enable IN endpoint FAILED!\n");
+ goto fail;
+ }
+ hidg->in_ep->driver_data = hidg;
+ }
+
+
+ if (hidg->out_ep != NULL) {
+ /* restart endpoint */
+ if (hidg->out_ep->driver_data != NULL)
+ usb_ep_disable(hidg->out_ep);
+
+ status = config_ep_by_speed(f->config->cdev->gadget, f,
+ hidg->out_ep);
+ if (status) {
+ ERROR(cdev, "config_ep_by_speed FAILED!\n");
+ goto fail;
+ }
+ status = usb_ep_enable(hidg->out_ep);
+ if (status < 0) {
+ ERROR(cdev, "Enable IN endpoint FAILED!\n");
+ goto fail;
+ }
+ hidg->out_ep->driver_data = hidg;
+
+ /*
+ * allocate a bunch of read buffers and queue them all at once.
+ */
+ for (i = 0; i < hidg->qlen && status == 0; i++) {
+ struct usb_request *req =
+ hidg_alloc_ep_req(hidg->out_ep,
+ hidg->report_length);
+ if (req) {
+ req->complete = hidg_set_report_complete;
+ req->context = hidg;
+ status = usb_ep_queue(hidg->out_ep, req,
+ GFP_ATOMIC);
+ if (status)
+ ERROR(cdev, "%s queue req --> %d\n",
+ hidg->out_ep->name, status);
+ } else {
+ usb_ep_disable(hidg->out_ep);
+ hidg->out_ep->driver_data = NULL;
+ status = -ENOMEM;
+ goto fail;
+ }
+ }
+ }
+
+fail:
+ return status;
+}
+
+const struct file_operations f_hidg_fops = {
+ .owner = THIS_MODULE,
+ .open = f_hidg_open,
+ .release = f_hidg_release,
+ .write = f_hidg_write,
+ .read = f_hidg_read,
+ .poll = f_hidg_poll,
+ .llseek = noop_llseek,
+};
+
+static int __init hidg_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_ep *ep;
+ struct f_hidg *hidg = func_to_hidg(f);
+ int status;
+ dev_t dev;
+
+ /* allocate instance-specific interface IDs, and patch descriptors */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ hidg_interface_desc.bInterfaceNumber = status;
+
+ /* allocate instance-specific endpoints */
+ status = -ENODEV;
+ ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_in_ep_desc);
+ if (!ep)
+ goto fail;
+ ep->driver_data = c->cdev; /* claim */
+ hidg->in_ep = ep;
+
+ ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_out_ep_desc);
+ if (!ep)
+ goto fail;
+ ep->driver_data = c->cdev; /* claim */
+ hidg->out_ep = ep;
+
+ /* preallocate request and buffer */
+ status = -ENOMEM;
+ hidg->req = usb_ep_alloc_request(hidg->in_ep, GFP_KERNEL);
+ if (!hidg->req)
+ goto fail;
+
+ hidg->req->buf = kmalloc(hidg->report_length, GFP_KERNEL);
+ if (!hidg->req->buf)
+ goto fail;
+
+ /* set descriptor dynamic values */
+ hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
+ hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
+ hidg_hs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+ hidg_fs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+ hidg_hs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+ hidg_fs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
+ hidg_desc.desc[0].bDescriptorType = HID_DT_REPORT;
+ hidg_desc.desc[0].wDescriptorLength =
+ cpu_to_le16(hidg->report_desc_length);
+
+ hidg_hs_in_ep_desc.bEndpointAddress =
+ hidg_fs_in_ep_desc.bEndpointAddress;
+ hidg_hs_out_ep_desc.bEndpointAddress =
+ hidg_fs_out_ep_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, hidg_fs_descriptors,
+ hidg_hs_descriptors, NULL);
+ if (status)
+ goto fail;
+
+ mutex_init(&hidg->lock);
+ spin_lock_init(&hidg->spinlock);
+ init_waitqueue_head(&hidg->write_queue);
+ init_waitqueue_head(&hidg->read_queue);
+ INIT_LIST_HEAD(&hidg->completed_out_req);
+
+ /* create char device */
+ cdev_init(&hidg->cdev, &f_hidg_fops);
+ dev = MKDEV(major, hidg->minor);
+ status = cdev_add(&hidg->cdev, dev, 1);
+ if (status)
+ goto fail;
+
+ device_create(hidg_class, NULL, dev, NULL, "%s%d", "hidg", hidg->minor);
+
+ return 0;
+
+fail:
+ ERROR(f->config->cdev, "hidg_bind FAILED\n");
+ if (hidg->req != NULL) {
+ kfree(hidg->req->buf);
+ if (hidg->in_ep != NULL)
+ usb_ep_free_request(hidg->in_ep, hidg->req);
+ }
+
+ usb_free_all_descriptors(f);
+ return status;
+}
+
+static void hidg_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_hidg *hidg = func_to_hidg(f);
+
+ device_destroy(hidg_class, MKDEV(major, hidg->minor));
+ cdev_del(&hidg->cdev);
+
+ /* disable/free request and end point */
+ usb_ep_disable(hidg->in_ep);
+ usb_ep_dequeue(hidg->in_ep, hidg->req);
+ kfree(hidg->req->buf);
+ usb_ep_free_request(hidg->in_ep, hidg->req);
+
+ usb_free_all_descriptors(f);
+
+ kfree(hidg->report_desc);
+ kfree(hidg);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Strings */
+
+#define CT_FUNC_HID_IDX 0
+
+static struct usb_string ct_func_string_defs[] = {
+ [CT_FUNC_HID_IDX].s = "HID Interface",
+ {}, /* end of list */
+};
+
+static struct usb_gadget_strings ct_func_string_table = {
+ .language = 0x0409, /* en-US */
+ .strings = ct_func_string_defs,
+};
+
+static struct usb_gadget_strings *ct_func_strings[] = {
+ &ct_func_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+/* usb_configuration */
+
+int __init hidg_bind_config(struct usb_configuration *c,
+ struct hidg_func_descriptor *fdesc, int index)
+{
+ struct f_hidg *hidg;
+ int status;
+
+ if (index >= minors)
+ return -ENOENT;
+
+ /* maybe allocate device-global string IDs, and patch descriptors */
+ if (ct_func_string_defs[CT_FUNC_HID_IDX].id == 0) {
+ status = usb_string_id(c->cdev);
+ if (status < 0)
+ return status;
+ ct_func_string_defs[CT_FUNC_HID_IDX].id = status;
+ hidg_interface_desc.iInterface = status;
+ }
+
+ /* allocate and initialize one new instance */
+ hidg = kzalloc(sizeof *hidg, GFP_KERNEL);
+ if (!hidg)
+ return -ENOMEM;
+
+ hidg->minor = index;
+ hidg->bInterfaceSubClass = fdesc->subclass;
+ hidg->bInterfaceProtocol = fdesc->protocol;
+ hidg->report_length = fdesc->report_length;
+ hidg->report_desc_length = fdesc->report_desc_length;
+ hidg->report_desc = kmemdup(fdesc->report_desc,
+ fdesc->report_desc_length,
+ GFP_KERNEL);
+ if (!hidg->report_desc) {
+ kfree(hidg);
+ return -ENOMEM;
+ }
+
+ hidg->func.name = "hid";
+ hidg->func.strings = ct_func_strings;
+ hidg->func.bind = hidg_bind;
+ hidg->func.unbind = hidg_unbind;
+ hidg->func.set_alt = hidg_set_alt;
+ hidg->func.disable = hidg_disable;
+ hidg->func.setup = hidg_setup;
+
+ /* this could me made configurable at some point */
+ hidg->qlen = 4;
+
+ status = usb_add_function(c, &hidg->func);
+ if (status)
+ kfree(hidg);
+
+ return status;
+}
+
+int __init ghid_setup(struct usb_gadget *g, int count)
+{
+ int status;
+ dev_t dev;
+
+ hidg_class = class_create(THIS_MODULE, "hidg");
+
+ status = alloc_chrdev_region(&dev, 0, count, "hidg");
+ if (!status) {
+ major = MAJOR(dev);
+ minors = count;
+ }
+
+ return status;
+}
+
+void ghid_cleanup(void)
+{
+ if (major) {
+ unregister_chrdev_region(MKDEV(major, 0), minors);
+ major = minors = 0;
+ }
+
+ class_destroy(hidg_class);
+ hidg_class = NULL;
+}
--- /dev/null
+/*
+ * f_loopback.c - USB peripheral loopback configuration driver
+ *
+ * Copyright (C) 2003-2008 David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/usb/composite.h>
+
+#include "g_zero.h"
+#include "u_f.h"
+
+/*
+ * LOOPBACK FUNCTION ... a testing vehicle for USB peripherals,
+ *
+ * This takes messages of various sizes written OUT to a device, and loops
+ * them back so they can be read IN from it. It has been used by certain
+ * test applications. It supports limited testing of data queueing logic.
+ *
+ *
+ * This is currently packaged as a configuration driver, which can't be
+ * combined with other functions to make composite devices. However, it
+ * can be combined with other independent configurations.
+ */
+struct f_loopback {
+ struct usb_function function;
+
+ struct usb_ep *in_ep;
+ struct usb_ep *out_ep;
+};
+
+static inline struct f_loopback *func_to_loop(struct usb_function *f)
+{
+ return container_of(f, struct f_loopback, function);
+}
+
+static unsigned qlen;
+static unsigned buflen;
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_interface_descriptor loopback_intf = {
+ .bLength = sizeof loopback_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_loop_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_loop_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *fs_loopback_descs[] = {
+ (struct usb_descriptor_header *) &loopback_intf,
+ (struct usb_descriptor_header *) &fs_loop_sink_desc,
+ (struct usb_descriptor_header *) &fs_loop_source_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_loop_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_loop_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *hs_loopback_descs[] = {
+ (struct usb_descriptor_header *) &loopback_intf,
+ (struct usb_descriptor_header *) &hs_loop_source_desc,
+ (struct usb_descriptor_header *) &hs_loop_sink_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_loop_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_loop_source_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = 0,
+};
+
+static struct usb_endpoint_descriptor ss_loop_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_loop_sink_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = 0,
+};
+
+static struct usb_descriptor_header *ss_loopback_descs[] = {
+ (struct usb_descriptor_header *) &loopback_intf,
+ (struct usb_descriptor_header *) &ss_loop_source_desc,
+ (struct usb_descriptor_header *) &ss_loop_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_loop_sink_desc,
+ (struct usb_descriptor_header *) &ss_loop_sink_comp_desc,
+ NULL,
+};
+
+/* function-specific strings: */
+
+static struct usb_string strings_loopback[] = {
+ [0].s = "loop input to output",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_loop = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_loopback,
+};
+
+static struct usb_gadget_strings *loopback_strings[] = {
+ &stringtab_loop,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int loopback_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_loopback *loop = func_to_loop(f);
+ int id;
+ int ret;
+
+ /* allocate interface ID(s) */
+ id = usb_interface_id(c, f);
+ if (id < 0)
+ return id;
+ loopback_intf.bInterfaceNumber = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_loopback[0].id = id;
+ loopback_intf.iInterface = id;
+
+ /* allocate endpoints */
+
+ loop->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_source_desc);
+ if (!loop->in_ep) {
+autoconf_fail:
+ ERROR(cdev, "%s: can't autoconfigure on %s\n",
+ f->name, cdev->gadget->name);
+ return -ENODEV;
+ }
+ loop->in_ep->driver_data = cdev; /* claim */
+
+ loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_sink_desc);
+ if (!loop->out_ep)
+ goto autoconf_fail;
+ loop->out_ep->driver_data = cdev; /* claim */
+
+ /* support high speed hardware */
+ hs_loop_source_desc.bEndpointAddress =
+ fs_loop_source_desc.bEndpointAddress;
+ hs_loop_sink_desc.bEndpointAddress = fs_loop_sink_desc.bEndpointAddress;
+
+ /* support super speed hardware */
+ ss_loop_source_desc.bEndpointAddress =
+ fs_loop_source_desc.bEndpointAddress;
+ ss_loop_sink_desc.bEndpointAddress = fs_loop_sink_desc.bEndpointAddress;
+
+ ret = usb_assign_descriptors(f, fs_loopback_descs, hs_loopback_descs,
+ ss_loopback_descs);
+ if (ret)
+ return ret;
+
+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
+ (gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
+ f->name, loop->in_ep->name, loop->out_ep->name);
+ return 0;
+}
+
+static void lb_free_func(struct usb_function *f)
+{
+ struct f_lb_opts *opts;
+
+ opts = container_of(f->fi, struct f_lb_opts, func_inst);
+
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+
+ usb_free_all_descriptors(f);
+ kfree(func_to_loop(f));
+}
+
+static void loopback_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_loopback *loop = ep->driver_data;
+ struct usb_composite_dev *cdev = loop->function.config->cdev;
+ int status = req->status;
+
+ switch (status) {
+
+ case 0: /* normal completion? */
+ if (ep == loop->out_ep) {
+ /* loop this OUT packet back IN to the host */
+ req->zero = (req->actual < req->length);
+ req->length = req->actual;
+ status = usb_ep_queue(loop->in_ep, req, GFP_ATOMIC);
+ if (status == 0)
+ return;
+
+ /* "should never get here" */
+ ERROR(cdev, "can't loop %s to %s: %d\n",
+ ep->name, loop->in_ep->name,
+ status);
+ }
+
+ /* queue the buffer for some later OUT packet */
+ req->length = buflen;
+ status = usb_ep_queue(loop->out_ep, req, GFP_ATOMIC);
+ if (status == 0)
+ return;
+
+ /* "should never get here" */
+ /* FALLTHROUGH */
+
+ default:
+ ERROR(cdev, "%s loop complete --> %d, %d/%d\n", ep->name,
+ status, req->actual, req->length);
+ /* FALLTHROUGH */
+
+ /* NOTE: since this driver doesn't maintain an explicit record
+ * of requests it submitted (just maintains qlen count), we
+ * rely on the hardware driver to clean up on disconnect or
+ * endpoint disable.
+ */
+ case -ECONNABORTED: /* hardware forced ep reset */
+ case -ECONNRESET: /* request dequeued */
+ case -ESHUTDOWN: /* disconnect from host */
+ free_ep_req(ep, req);
+ return;
+ }
+}
+
+static void disable_loopback(struct f_loopback *loop)
+{
+ struct usb_composite_dev *cdev;
+
+ cdev = loop->function.config->cdev;
+ disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL);
+ VDBG(cdev, "%s disabled\n", loop->function.name);
+}
+
+static inline struct usb_request *lb_alloc_ep_req(struct usb_ep *ep, int len)
+{
+ return alloc_ep_req(ep, len, buflen);
+}
+
+static int
+enable_loopback(struct usb_composite_dev *cdev, struct f_loopback *loop)
+{
+ int result = 0;
+ struct usb_ep *ep;
+ struct usb_request *req;
+ unsigned i;
+
+ /* one endpoint writes data back IN to the host */
+ ep = loop->in_ep;
+ result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);
+ if (result)
+ return result;
+ result = usb_ep_enable(ep);
+ if (result < 0)
+ return result;
+ ep->driver_data = loop;
+
+ /* one endpoint just reads OUT packets */
+ ep = loop->out_ep;
+ result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);
+ if (result)
+ goto fail0;
+
+ result = usb_ep_enable(ep);
+ if (result < 0) {
+fail0:
+ ep = loop->in_ep;
+ usb_ep_disable(ep);
+ ep->driver_data = NULL;
+ return result;
+ }
+ ep->driver_data = loop;
+
+ /* allocate a bunch of read buffers and queue them all at once.
+ * we buffer at most 'qlen' transfers; fewer if any need more
+ * than 'buflen' bytes each.
+ */
+ for (i = 0; i < qlen && result == 0; i++) {
+ req = lb_alloc_ep_req(ep, 0);
+ if (req) {
+ req->complete = loopback_complete;
+ result = usb_ep_queue(ep, req, GFP_ATOMIC);
+ if (result)
+ ERROR(cdev, "%s queue req --> %d\n",
+ ep->name, result);
+ } else {
+ usb_ep_disable(ep);
+ ep->driver_data = NULL;
+ result = -ENOMEM;
+ goto fail0;
+ }
+ }
+
+ DBG(cdev, "%s enabled\n", loop->function.name);
+ return result;
+}
+
+static int loopback_set_alt(struct usb_function *f,
+ unsigned intf, unsigned alt)
+{
+ struct f_loopback *loop = func_to_loop(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ /* we know alt is zero */
+ if (loop->in_ep->driver_data)
+ disable_loopback(loop);
+ return enable_loopback(cdev, loop);
+}
+
+static void loopback_disable(struct usb_function *f)
+{
+ struct f_loopback *loop = func_to_loop(f);
+
+ disable_loopback(loop);
+}
+
+static struct usb_function *loopback_alloc(struct usb_function_instance *fi)
+{
+ struct f_loopback *loop;
+ struct f_lb_opts *lb_opts;
+
+ loop = kzalloc(sizeof *loop, GFP_KERNEL);
+ if (!loop)
+ return ERR_PTR(-ENOMEM);
+
+ lb_opts = container_of(fi, struct f_lb_opts, func_inst);
+
+ mutex_lock(&lb_opts->lock);
+ lb_opts->refcnt++;
+ mutex_unlock(&lb_opts->lock);
+
+ buflen = lb_opts->bulk_buflen;
+ qlen = lb_opts->qlen;
+ if (!qlen)
+ qlen = 32;
+
+ loop->function.name = "loopback";
+ loop->function.bind = loopback_bind;
+ loop->function.set_alt = loopback_set_alt;
+ loop->function.disable = loopback_disable;
+ loop->function.strings = loopback_strings;
+
+ loop->function.free_func = lb_free_func;
+
+ return &loop->function;
+}
+
+static inline struct f_lb_opts *to_f_lb_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_lb_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(f_lb_opts);
+CONFIGFS_ATTR_OPS(f_lb_opts);
+
+static void lb_attr_release(struct config_item *item)
+{
+ struct f_lb_opts *lb_opts = to_f_lb_opts(item);
+
+ usb_put_function_instance(&lb_opts->func_inst);
+}
+
+static struct configfs_item_operations lb_item_ops = {
+ .release = lb_attr_release,
+ .show_attribute = f_lb_opts_attr_show,
+ .store_attribute = f_lb_opts_attr_store,
+};
+
+static ssize_t f_lb_opts_qlen_show(struct f_lb_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->qlen);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_lb_opts_qlen_store(struct f_lb_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u32 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou32(page, 0, &num);
+ if (ret)
+ goto end;
+
+ opts->qlen = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_lb_opts_attribute f_lb_opts_qlen =
+ __CONFIGFS_ATTR(qlen, S_IRUGO | S_IWUSR,
+ f_lb_opts_qlen_show,
+ f_lb_opts_qlen_store);
+
+static ssize_t f_lb_opts_bulk_buflen_show(struct f_lb_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->bulk_buflen);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_lb_opts_bulk_buflen_store(struct f_lb_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u32 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou32(page, 0, &num);
+ if (ret)
+ goto end;
+
+ opts->bulk_buflen = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_lb_opts_attribute f_lb_opts_bulk_buflen =
+ __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
+ f_lb_opts_bulk_buflen_show,
+ f_lb_opts_bulk_buflen_store);
+
+static struct configfs_attribute *lb_attrs[] = {
+ &f_lb_opts_qlen.attr,
+ &f_lb_opts_bulk_buflen.attr,
+ NULL,
+};
+
+static struct config_item_type lb_func_type = {
+ .ct_item_ops = &lb_item_ops,
+ .ct_attrs = lb_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void lb_free_instance(struct usb_function_instance *fi)
+{
+ struct f_lb_opts *lb_opts;
+
+ lb_opts = container_of(fi, struct f_lb_opts, func_inst);
+ kfree(lb_opts);
+}
+
+static struct usb_function_instance *loopback_alloc_instance(void)
+{
+ struct f_lb_opts *lb_opts;
+
+ lb_opts = kzalloc(sizeof(*lb_opts), GFP_KERNEL);
+ if (!lb_opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&lb_opts->lock);
+ lb_opts->func_inst.free_func_inst = lb_free_instance;
+ lb_opts->bulk_buflen = GZERO_BULK_BUFLEN;
+ lb_opts->qlen = GZERO_QLEN;
+
+ config_group_init_type_name(&lb_opts->func_inst.group, "",
+ &lb_func_type);
+
+ return &lb_opts->func_inst;
+}
+DECLARE_USB_FUNCTION(Loopback, loopback_alloc_instance, loopback_alloc);
+
+int __init lb_modinit(void)
+{
+ int ret;
+
+ ret = usb_function_register(&Loopbackusb_func);
+ if (ret)
+ return ret;
+ return ret;
+}
+void __exit lb_modexit(void)
+{
+ usb_function_unregister(&Loopbackusb_func);
+}
+
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * f_mass_storage.c -- Mass Storage USB Composite Function
+ *
+ * Copyright (C) 2003-2008 Alan Stern
+ * Copyright (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz <mina86@mina86.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * The Mass Storage Function acts as a USB Mass Storage device,
+ * appearing to the host as a disk drive or as a CD-ROM drive. In
+ * addition to providing an example of a genuinely useful composite
+ * function for a USB device, it also illustrates a technique of
+ * double-buffering for increased throughput.
+ *
+ * For more information about MSF and in particular its module
+ * parameters and sysfs interface read the
+ * <Documentation/usb/mass-storage.txt> file.
+ */
+
+/*
+ * MSF is configured by specifying a fsg_config structure. It has the
+ * following fields:
+ *
+ * nluns Number of LUNs function have (anywhere from 1
+ * to FSG_MAX_LUNS which is 8).
+ * luns An array of LUN configuration values. This
+ * should be filled for each LUN that
+ * function will include (ie. for "nluns"
+ * LUNs). Each element of the array has
+ * the following fields:
+ * ->filename The path to the backing file for the LUN.
+ * Required if LUN is not marked as
+ * removable.
+ * ->ro Flag specifying access to the LUN shall be
+ * read-only. This is implied if CD-ROM
+ * emulation is enabled as well as when
+ * it was impossible to open "filename"
+ * in R/W mode.
+ * ->removable Flag specifying that LUN shall be indicated as
+ * being removable.
+ * ->cdrom Flag specifying that LUN shall be reported as
+ * being a CD-ROM.
+ * ->nofua Flag specifying that FUA flag in SCSI WRITE(10,12)
+ * commands for this LUN shall be ignored.
+ *
+ * vendor_name
+ * product_name
+ * release Information used as a reply to INQUIRY
+ * request. To use default set to NULL,
+ * NULL, 0xffff respectively. The first
+ * field should be 8 and the second 16
+ * characters or less.
+ *
+ * can_stall Set to permit function to halt bulk endpoints.
+ * Disabled on some USB devices known not
+ * to work correctly. You should set it
+ * to true.
+ *
+ * If "removable" is not set for a LUN then a backing file must be
+ * specified. If it is set, then NULL filename means the LUN's medium
+ * is not loaded (an empty string as "filename" in the fsg_config
+ * structure causes error). The CD-ROM emulation includes a single
+ * data track and no audio tracks; hence there need be only one
+ * backing file per LUN.
+ *
+ * This function is heavily based on "File-backed Storage Gadget" by
+ * Alan Stern which in turn is heavily based on "Gadget Zero" by David
+ * Brownell. The driver's SCSI command interface was based on the
+ * "Information technology - Small Computer System Interface - 2"
+ * document from X3T9.2 Project 375D, Revision 10L, 7-SEP-93,
+ * available at <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>.
+ * The single exception is opcode 0x23 (READ FORMAT CAPACITIES), which
+ * was based on the "Universal Serial Bus Mass Storage Class UFI
+ * Command Specification" document, Revision 1.0, December 14, 1998,
+ * available at
+ * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>.
+ */
+
+/*
+ * Driver Design
+ *
+ * The MSF is fairly straightforward. There is a main kernel
+ * thread that handles most of the work. Interrupt routines field
+ * callbacks from the controller driver: bulk- and interrupt-request
+ * completion notifications, endpoint-0 events, and disconnect events.
+ * Completion events are passed to the main thread by wakeup calls. Many
+ * ep0 requests are handled at interrupt time, but SetInterface,
+ * SetConfiguration, and device reset requests are forwarded to the
+ * thread in the form of "exceptions" using SIGUSR1 signals (since they
+ * should interrupt any ongoing file I/O operations).
+ *
+ * The thread's main routine implements the standard command/data/status
+ * parts of a SCSI interaction. It and its subroutines are full of tests
+ * for pending signals/exceptions -- all this polling is necessary since
+ * the kernel has no setjmp/longjmp equivalents. (Maybe this is an
+ * indication that the driver really wants to be running in userspace.)
+ * An important point is that so long as the thread is alive it keeps an
+ * open reference to the backing file. This will prevent unmounting
+ * the backing file's underlying filesystem and could cause problems
+ * during system shutdown, for example. To prevent such problems, the
+ * thread catches INT, TERM, and KILL signals and converts them into
+ * an EXIT exception.
+ *
+ * In normal operation the main thread is started during the gadget's
+ * fsg_bind() callback and stopped during fsg_unbind(). But it can
+ * also exit when it receives a signal, and there's no point leaving
+ * the gadget running when the thread is dead. As of this moment, MSF
+ * provides no way to deregister the gadget when thread dies -- maybe
+ * a callback functions is needed.
+ *
+ * To provide maximum throughput, the driver uses a circular pipeline of
+ * buffer heads (struct fsg_buffhd). In principle the pipeline can be
+ * arbitrarily long; in practice the benefits don't justify having more
+ * than 2 stages (i.e., double buffering). But it helps to think of the
+ * pipeline as being a long one. Each buffer head contains a bulk-in and
+ * a bulk-out request pointer (since the buffer can be used for both
+ * output and input -- directions always are given from the host's
+ * point of view) as well as a pointer to the buffer and various state
+ * variables.
+ *
+ * Use of the pipeline follows a simple protocol. There is a variable
+ * (fsg->next_buffhd_to_fill) that points to the next buffer head to use.
+ * At any time that buffer head may still be in use from an earlier
+ * request, so each buffer head has a state variable indicating whether
+ * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the
+ * buffer head to be EMPTY, filling the buffer either by file I/O or by
+ * USB I/O (during which the buffer head is BUSY), and marking the buffer
+ * head FULL when the I/O is complete. Then the buffer will be emptied
+ * (again possibly by USB I/O, during which it is marked BUSY) and
+ * finally marked EMPTY again (possibly by a completion routine).
+ *
+ * A module parameter tells the driver to avoid stalling the bulk
+ * endpoints wherever the transport specification allows. This is
+ * necessary for some UDCs like the SuperH, which cannot reliably clear a
+ * halt on a bulk endpoint. However, under certain circumstances the
+ * Bulk-only specification requires a stall. In such cases the driver
+ * will halt the endpoint and set a flag indicating that it should clear
+ * the halt in software during the next device reset. Hopefully this
+ * will permit everything to work correctly. Furthermore, although the
+ * specification allows the bulk-out endpoint to halt when the host sends
+ * too much data, implementing this would cause an unavoidable race.
+ * The driver will always use the "no-stall" approach for OUT transfers.
+ *
+ * One subtle point concerns sending status-stage responses for ep0
+ * requests. Some of these requests, such as device reset, can involve
+ * interrupting an ongoing file I/O operation, which might take an
+ * arbitrarily long time. During that delay the host might give up on
+ * the original ep0 request and issue a new one. When that happens the
+ * driver should not notify the host about completion of the original
+ * request, as the host will no longer be waiting for it. So the driver
+ * assigns to each ep0 request a unique tag, and it keeps track of the
+ * tag value of the request associated with a long-running exception
+ * (device-reset, interface-change, or configuration-change). When the
+ * exception handler is finished, the status-stage response is submitted
+ * only if the current ep0 request tag is equal to the exception request
+ * tag. Thus only the most recently received ep0 request will get a
+ * status-stage response.
+ *
+ * Warning: This driver source file is too long. It ought to be split up
+ * into a header file plus about 3 separate .c files, to handle the details
+ * of the Gadget, USB Mass Storage, and SCSI protocols.
+ */
+
+
+/* #define VERBOSE_DEBUG */
+/* #define DUMP_MSGS */
+
+#include <linux/blkdev.h>
+#include <linux/completion.h>
+#include <linux/dcache.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/fcntl.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/kref.h>
+#include <linux/kthread.h>
+#include <linux/limits.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/freezer.h>
+#include <linux/module.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/composite.h>
+
+#include "gadget_chips.h"
+#include "configfs.h"
+
+
+/*------------------------------------------------------------------------*/
+
+#define FSG_DRIVER_DESC "Mass Storage Function"
+#define FSG_DRIVER_VERSION "2009/09/11"
+
+static const char fsg_string_interface[] = "Mass Storage";
+
+#include "storage_common.h"
+#include "f_mass_storage.h"
+
+/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
+static struct usb_string fsg_strings[] = {
+ {FSG_STRING_INTERFACE, fsg_string_interface},
+ {}
+};
+
+static struct usb_gadget_strings fsg_stringtab = {
+ .language = 0x0409, /* en-us */
+ .strings = fsg_strings,
+};
+
+static struct usb_gadget_strings *fsg_strings_array[] = {
+ &fsg_stringtab,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+struct fsg_dev;
+struct fsg_common;
+
+/* Data shared by all the FSG instances. */
+struct fsg_common {
+ struct usb_gadget *gadget;
+ struct usb_composite_dev *cdev;
+ struct fsg_dev *fsg, *new_fsg;
+ wait_queue_head_t fsg_wait;
+
+ /* filesem protects: backing files in use */
+ struct rw_semaphore filesem;
+
+ /* lock protects: state, all the req_busy's */
+ spinlock_t lock;
+
+ struct usb_ep *ep0; /* Copy of gadget->ep0 */
+ struct usb_request *ep0req; /* Copy of cdev->req */
+ unsigned int ep0_req_tag;
+
+ struct fsg_buffhd *next_buffhd_to_fill;
+ struct fsg_buffhd *next_buffhd_to_drain;
+ struct fsg_buffhd *buffhds;
+ unsigned int fsg_num_buffers;
+
+ int cmnd_size;
+ u8 cmnd[MAX_COMMAND_SIZE];
+
+ unsigned int nluns;
+ unsigned int lun;
+ struct fsg_lun **luns;
+ struct fsg_lun *curlun;
+
+ unsigned int bulk_out_maxpacket;
+ enum fsg_state state; /* For exception handling */
+ unsigned int exception_req_tag;
+
+ enum data_direction data_dir;
+ u32 data_size;
+ u32 data_size_from_cmnd;
+ u32 tag;
+ u32 residue;
+ u32 usb_amount_left;
+
+ unsigned int can_stall:1;
+ unsigned int free_storage_on_release:1;
+ unsigned int phase_error:1;
+ unsigned int short_packet_received:1;
+ unsigned int bad_lun_okay:1;
+ unsigned int running:1;
+ unsigned int sysfs:1;
+
+ int thread_wakeup_needed;
+ struct completion thread_notifier;
+ struct task_struct *thread_task;
+
+ /* Callback functions. */
+ const struct fsg_operations *ops;
+ /* Gadget's private data. */
+ void *private_data;
+
+ /*
+ * Vendor (8 chars), product (16 chars), release (4
+ * hexadecimal digits) and NUL byte
+ */
+ char inquiry_string[8 + 16 + 4 + 1];
+
+ struct kref ref;
+};
+
+struct fsg_dev {
+ struct usb_function function;
+ struct usb_gadget *gadget; /* Copy of cdev->gadget */
+ struct fsg_common *common;
+
+ u16 interface_number;
+
+ unsigned int bulk_in_enabled:1;
+ unsigned int bulk_out_enabled:1;
+
+ unsigned long atomic_bitflags;
+#define IGNORE_BULK_OUT 0
+
+ struct usb_ep *bulk_in;
+ struct usb_ep *bulk_out;
+};
+
+static inline int __fsg_is_set(struct fsg_common *common,
+ const char *func, unsigned line)
+{
+ if (common->fsg)
+ return 1;
+ ERROR(common, "common->fsg is NULL in %s at %u\n", func, line);
+ WARN_ON(1);
+ return 0;
+}
+
+#define fsg_is_set(common) likely(__fsg_is_set(common, __func__, __LINE__))
+
+static inline struct fsg_dev *fsg_from_func(struct usb_function *f)
+{
+ return container_of(f, struct fsg_dev, function);
+}
+
+typedef void (*fsg_routine_t)(struct fsg_dev *);
+
+static int exception_in_progress(struct fsg_common *common)
+{
+ return common->state > FSG_STATE_IDLE;
+}
+
+/* Make bulk-out requests be divisible by the maxpacket size */
+static void set_bulk_out_req_length(struct fsg_common *common,
+ struct fsg_buffhd *bh, unsigned int length)
+{
+ unsigned int rem;
+
+ bh->bulk_out_intended_length = length;
+ rem = length % common->bulk_out_maxpacket;
+ if (rem > 0)
+ length += common->bulk_out_maxpacket - rem;
+ bh->outreq->length = length;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
+{
+ const char *name;
+
+ if (ep == fsg->bulk_in)
+ name = "bulk-in";
+ else if (ep == fsg->bulk_out)
+ name = "bulk-out";
+ else
+ name = ep->name;
+ DBG(fsg, "%s set halt\n", name);
+ return usb_ep_set_halt(ep);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* These routines may be called in process context or in_irq */
+
+/* Caller must hold fsg->lock */
+static void wakeup_thread(struct fsg_common *common)
+{
+ smp_wmb(); /* ensure the write of bh->state is complete */
+ /* Tell the main thread that something has happened */
+ common->thread_wakeup_needed = 1;
+ if (common->thread_task)
+ wake_up_process(common->thread_task);
+}
+
+static void raise_exception(struct fsg_common *common, enum fsg_state new_state)
+{
+ unsigned long flags;
+
+ /*
+ * Do nothing if a higher-priority exception is already in progress.
+ * If a lower-or-equal priority exception is in progress, preempt it
+ * and notify the main thread by sending it a signal.
+ */
+ spin_lock_irqsave(&common->lock, flags);
+ if (common->state <= new_state) {
+ common->exception_req_tag = common->ep0_req_tag;
+ common->state = new_state;
+ if (common->thread_task)
+ send_sig_info(SIGUSR1, SEND_SIG_FORCED,
+ common->thread_task);
+ }
+ spin_unlock_irqrestore(&common->lock, flags);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int ep0_queue(struct fsg_common *common)
+{
+ int rc;
+
+ rc = usb_ep_queue(common->ep0, common->ep0req, GFP_ATOMIC);
+ common->ep0->driver_data = common;
+ if (rc != 0 && rc != -ESHUTDOWN) {
+ /* We can't do much more than wait for a reset */
+ WARNING(common, "error in submission: %s --> %d\n",
+ common->ep0->name, rc);
+ }
+ return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* Completion handlers. These always run in_irq. */
+
+static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct fsg_common *common = ep->driver_data;
+ struct fsg_buffhd *bh = req->context;
+
+ if (req->status || req->actual != req->length)
+ DBG(common, "%s --> %d, %u/%u\n", __func__,
+ req->status, req->actual, req->length);
+ if (req->status == -ECONNRESET) /* Request was cancelled */
+ usb_ep_fifo_flush(ep);
+
+ /* Hold the lock while we update the request and buffer states */
+ smp_wmb();
+ spin_lock(&common->lock);
+ bh->inreq_busy = 0;
+ bh->state = BUF_STATE_EMPTY;
+ wakeup_thread(common);
+ spin_unlock(&common->lock);
+}
+
+static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct fsg_common *common = ep->driver_data;
+ struct fsg_buffhd *bh = req->context;
+
+ dump_msg(common, "bulk-out", req->buf, req->actual);
+ if (req->status || req->actual != bh->bulk_out_intended_length)
+ DBG(common, "%s --> %d, %u/%u\n", __func__,
+ req->status, req->actual, bh->bulk_out_intended_length);
+ if (req->status == -ECONNRESET) /* Request was cancelled */
+ usb_ep_fifo_flush(ep);
+
+ /* Hold the lock while we update the request and buffer states */
+ smp_wmb();
+ spin_lock(&common->lock);
+ bh->outreq_busy = 0;
+ bh->state = BUF_STATE_FULL;
+ wakeup_thread(common);
+ spin_unlock(&common->lock);
+}
+
+static int fsg_setup(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct fsg_dev *fsg = fsg_from_func(f);
+ struct usb_request *req = fsg->common->ep0req;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ if (!fsg_is_set(fsg->common))
+ return -EOPNOTSUPP;
+
+ ++fsg->common->ep0_req_tag; /* Record arrival of a new request */
+ req->context = NULL;
+ req->length = 0;
+ dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
+
+ switch (ctrl->bRequest) {
+
+ case US_BULK_RESET_REQUEST:
+ if (ctrl->bRequestType !=
+ (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
+ break;
+ if (w_index != fsg->interface_number || w_value != 0 ||
+ w_length != 0)
+ return -EDOM;
+
+ /*
+ * Raise an exception to stop the current operation
+ * and reinitialize our state.
+ */
+ DBG(fsg, "bulk reset request\n");
+ raise_exception(fsg->common, FSG_STATE_RESET);
+ return USB_GADGET_DELAYED_STATUS;
+
+ case US_BULK_GET_MAX_LUN:
+ if (ctrl->bRequestType !=
+ (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
+ break;
+ if (w_index != fsg->interface_number || w_value != 0 ||
+ w_length != 1)
+ return -EDOM;
+ VDBG(fsg, "get max LUN\n");
+ *(u8 *)req->buf = fsg->common->nluns - 1;
+
+ /* Respond with data/status */
+ req->length = min((u16)1, w_length);
+ return ep0_queue(fsg->common);
+ }
+
+ VDBG(fsg,
+ "unknown class-specific control req %02x.%02x v%04x i%04x l%u\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ le16_to_cpu(ctrl->wValue), w_index, w_length);
+ return -EOPNOTSUPP;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* All the following routines run in process context */
+
+/* Use this for bulk or interrupt transfers, not ep0 */
+static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
+ struct usb_request *req, int *pbusy,
+ enum fsg_buffer_state *state)
+{
+ int rc;
+
+ if (ep == fsg->bulk_in)
+ dump_msg(fsg, "bulk-in", req->buf, req->length);
+
+ spin_lock_irq(&fsg->common->lock);
+ *pbusy = 1;
+ *state = BUF_STATE_BUSY;
+ spin_unlock_irq(&fsg->common->lock);
+ rc = usb_ep_queue(ep, req, GFP_KERNEL);
+ if (rc != 0) {
+ *pbusy = 0;
+ *state = BUF_STATE_EMPTY;
+
+ /* We can't do much more than wait for a reset */
+
+ /*
+ * Note: currently the net2280 driver fails zero-length
+ * submissions if DMA is enabled.
+ */
+ if (rc != -ESHUTDOWN &&
+ !(rc == -EOPNOTSUPP && req->length == 0))
+ WARNING(fsg, "error in submission: %s --> %d\n",
+ ep->name, rc);
+ }
+}
+
+static bool start_in_transfer(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ if (!fsg_is_set(common))
+ return false;
+ start_transfer(common->fsg, common->fsg->bulk_in,
+ bh->inreq, &bh->inreq_busy, &bh->state);
+ return true;
+}
+
+static bool start_out_transfer(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ if (!fsg_is_set(common))
+ return false;
+ start_transfer(common->fsg, common->fsg->bulk_out,
+ bh->outreq, &bh->outreq_busy, &bh->state);
+ return true;
+}
+
+static int sleep_thread(struct fsg_common *common, bool can_freeze)
+{
+ int rc = 0;
+
+ /* Wait until a signal arrives or we are woken up */
+ for (;;) {
+ if (can_freeze)
+ try_to_freeze();
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (signal_pending(current)) {
+ rc = -EINTR;
+ break;
+ }
+ if (common->thread_wakeup_needed)
+ break;
+ schedule();
+ }
+ __set_current_state(TASK_RUNNING);
+ common->thread_wakeup_needed = 0;
+ smp_rmb(); /* ensure the latest bh->state is visible */
+ return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_read(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u32 lba;
+ struct fsg_buffhd *bh;
+ int rc;
+ u32 amount_left;
+ loff_t file_offset, file_offset_tmp;
+ unsigned int amount;
+ ssize_t nread;
+
+ /*
+ * Get the starting Logical Block Address and check that it's
+ * not too big.
+ */
+ if (common->cmnd[0] == READ_6)
+ lba = get_unaligned_be24(&common->cmnd[1]);
+ else {
+ lba = get_unaligned_be32(&common->cmnd[2]);
+
+ /*
+ * We allow DPO (Disable Page Out = don't save data in the
+ * cache) and FUA (Force Unit Access = don't read from the
+ * cache), but we don't implement them.
+ */
+ if ((common->cmnd[1] & ~0x18) != 0) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+ }
+ if (lba >= curlun->num_sectors) {
+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ return -EINVAL;
+ }
+ file_offset = ((loff_t) lba) << curlun->blkbits;
+
+ /* Carry out the file reads */
+ amount_left = common->data_size_from_cmnd;
+ if (unlikely(amount_left == 0))
+ return -EIO; /* No default reply */
+
+ for (;;) {
+ /*
+ * Figure out how much we need to read:
+ * Try to read the remaining amount.
+ * But don't read more than the buffer size.
+ * And don't try to read past the end of the file.
+ */
+ amount = min(amount_left, FSG_BUFLEN);
+ amount = min((loff_t)amount,
+ curlun->file_length - file_offset);
+
+ /* Wait for the next buffer to become available */
+ bh = common->next_buffhd_to_fill;
+ while (bh->state != BUF_STATE_EMPTY) {
+ rc = sleep_thread(common, false);
+ if (rc)
+ return rc;
+ }
+
+ /*
+ * If we were asked to read past the end of file,
+ * end with an empty buffer.
+ */
+ if (amount == 0) {
+ curlun->sense_data =
+ SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ curlun->sense_data_info =
+ file_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ bh->inreq->length = 0;
+ bh->state = BUF_STATE_FULL;
+ break;
+ }
+
+ /* Perform the read */
+ file_offset_tmp = file_offset;
+ nread = vfs_read(curlun->filp,
+ (char __user *)bh->buf,
+ amount, &file_offset_tmp);
+ VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
+ (unsigned long long)file_offset, (int)nread);
+ if (signal_pending(current))
+ return -EINTR;
+
+ if (nread < 0) {
+ LDBG(curlun, "error in file read: %d\n", (int)nread);
+ nread = 0;
+ } else if (nread < amount) {
+ LDBG(curlun, "partial file read: %d/%u\n",
+ (int)nread, amount);
+ nread = round_down(nread, curlun->blksize);
+ }
+ file_offset += nread;
+ amount_left -= nread;
+ common->residue -= nread;
+
+ /*
+ * Except at the end of the transfer, nread will be
+ * equal to the buffer size, which is divisible by the
+ * bulk-in maxpacket size.
+ */
+ bh->inreq->length = nread;
+ bh->state = BUF_STATE_FULL;
+
+ /* If an error occurred, report it and its position */
+ if (nread < amount) {
+ curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
+ curlun->sense_data_info =
+ file_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ break;
+ }
+
+ if (amount_left == 0)
+ break; /* No more left to read */
+
+ /* Send this buffer and go read some more */
+ bh->inreq->zero = 0;
+ if (!start_in_transfer(common, bh))
+ /* Don't know what to do if common->fsg is NULL */
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
+ }
+
+ return -EIO; /* No default reply */
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_write(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u32 lba;
+ struct fsg_buffhd *bh;
+ int get_some_more;
+ u32 amount_left_to_req, amount_left_to_write;
+ loff_t usb_offset, file_offset, file_offset_tmp;
+ unsigned int amount;
+ ssize_t nwritten;
+ int rc;
+
+ if (curlun->ro) {
+ curlun->sense_data = SS_WRITE_PROTECTED;
+ return -EINVAL;
+ }
+ spin_lock(&curlun->filp->f_lock);
+ curlun->filp->f_flags &= ~O_SYNC; /* Default is not to wait */
+ spin_unlock(&curlun->filp->f_lock);
+
+ /*
+ * Get the starting Logical Block Address and check that it's
+ * not too big
+ */
+ if (common->cmnd[0] == WRITE_6)
+ lba = get_unaligned_be24(&common->cmnd[1]);
+ else {
+ lba = get_unaligned_be32(&common->cmnd[2]);
+
+ /*
+ * We allow DPO (Disable Page Out = don't save data in the
+ * cache) and FUA (Force Unit Access = write directly to the
+ * medium). We don't implement DPO; we implement FUA by
+ * performing synchronous output.
+ */
+ if (common->cmnd[1] & ~0x18) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+ if (!curlun->nofua && (common->cmnd[1] & 0x08)) { /* FUA */
+ spin_lock(&curlun->filp->f_lock);
+ curlun->filp->f_flags |= O_SYNC;
+ spin_unlock(&curlun->filp->f_lock);
+ }
+ }
+ if (lba >= curlun->num_sectors) {
+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ return -EINVAL;
+ }
+
+ /* Carry out the file writes */
+ get_some_more = 1;
+ file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits;
+ amount_left_to_req = common->data_size_from_cmnd;
+ amount_left_to_write = common->data_size_from_cmnd;
+
+ while (amount_left_to_write > 0) {
+
+ /* Queue a request for more data from the host */
+ bh = common->next_buffhd_to_fill;
+ if (bh->state == BUF_STATE_EMPTY && get_some_more) {
+
+ /*
+ * Figure out how much we want to get:
+ * Try to get the remaining amount,
+ * but not more than the buffer size.
+ */
+ amount = min(amount_left_to_req, FSG_BUFLEN);
+
+ /* Beyond the end of the backing file? */
+ if (usb_offset >= curlun->file_length) {
+ get_some_more = 0;
+ curlun->sense_data =
+ SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ curlun->sense_data_info =
+ usb_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ continue;
+ }
+
+ /* Get the next buffer */
+ usb_offset += amount;
+ common->usb_amount_left -= amount;
+ amount_left_to_req -= amount;
+ if (amount_left_to_req == 0)
+ get_some_more = 0;
+
+ /*
+ * Except at the end of the transfer, amount will be
+ * equal to the buffer size, which is divisible by
+ * the bulk-out maxpacket size.
+ */
+ set_bulk_out_req_length(common, bh, amount);
+ if (!start_out_transfer(common, bh))
+ /* Dunno what to do if common->fsg is NULL */
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
+ continue;
+ }
+
+ /* Write the received data to the backing file */
+ bh = common->next_buffhd_to_drain;
+ if (bh->state == BUF_STATE_EMPTY && !get_some_more)
+ break; /* We stopped early */
+ if (bh->state == BUF_STATE_FULL) {
+ smp_rmb();
+ common->next_buffhd_to_drain = bh->next;
+ bh->state = BUF_STATE_EMPTY;
+
+ /* Did something go wrong with the transfer? */
+ if (bh->outreq->status != 0) {
+ curlun->sense_data = SS_COMMUNICATION_FAILURE;
+ curlun->sense_data_info =
+ file_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ break;
+ }
+
+ amount = bh->outreq->actual;
+ if (curlun->file_length - file_offset < amount) {
+ LERROR(curlun,
+ "write %u @ %llu beyond end %llu\n",
+ amount, (unsigned long long)file_offset,
+ (unsigned long long)curlun->file_length);
+ amount = curlun->file_length - file_offset;
+ }
+
+ /* Don't accept excess data. The spec doesn't say
+ * what to do in this case. We'll ignore the error.
+ */
+ amount = min(amount, bh->bulk_out_intended_length);
+
+ /* Don't write a partial block */
+ amount = round_down(amount, curlun->blksize);
+ if (amount == 0)
+ goto empty_write;
+
+ /* Perform the write */
+ file_offset_tmp = file_offset;
+ nwritten = vfs_write(curlun->filp,
+ (char __user *)bh->buf,
+ amount, &file_offset_tmp);
+ VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
+ (unsigned long long)file_offset, (int)nwritten);
+ if (signal_pending(current))
+ return -EINTR; /* Interrupted! */
+
+ if (nwritten < 0) {
+ LDBG(curlun, "error in file write: %d\n",
+ (int)nwritten);
+ nwritten = 0;
+ } else if (nwritten < amount) {
+ LDBG(curlun, "partial file write: %d/%u\n",
+ (int)nwritten, amount);
+ nwritten = round_down(nwritten, curlun->blksize);
+ }
+ file_offset += nwritten;
+ amount_left_to_write -= nwritten;
+ common->residue -= nwritten;
+
+ /* If an error occurred, report it and its position */
+ if (nwritten < amount) {
+ curlun->sense_data = SS_WRITE_ERROR;
+ curlun->sense_data_info =
+ file_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ break;
+ }
+
+ empty_write:
+ /* Did the host decide to stop early? */
+ if (bh->outreq->actual < bh->bulk_out_intended_length) {
+ common->short_packet_received = 1;
+ break;
+ }
+ continue;
+ }
+
+ /* Wait for something to happen */
+ rc = sleep_thread(common, false);
+ if (rc)
+ return rc;
+ }
+
+ return -EIO; /* No default reply */
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_synchronize_cache(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ int rc;
+
+ /* We ignore the requested LBA and write out all file's
+ * dirty data buffers. */
+ rc = fsg_lun_fsync_sub(curlun);
+ if (rc)
+ curlun->sense_data = SS_WRITE_ERROR;
+ return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static void invalidate_sub(struct fsg_lun *curlun)
+{
+ struct file *filp = curlun->filp;
+ struct inode *inode = file_inode(filp);
+ unsigned long rc;
+
+ rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
+ VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
+}
+
+static int do_verify(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u32 lba;
+ u32 verification_length;
+ struct fsg_buffhd *bh = common->next_buffhd_to_fill;
+ loff_t file_offset, file_offset_tmp;
+ u32 amount_left;
+ unsigned int amount;
+ ssize_t nread;
+
+ /*
+ * Get the starting Logical Block Address and check that it's
+ * not too big.
+ */
+ lba = get_unaligned_be32(&common->cmnd[2]);
+ if (lba >= curlun->num_sectors) {
+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ return -EINVAL;
+ }
+
+ /*
+ * We allow DPO (Disable Page Out = don't save data in the
+ * cache) but we don't implement it.
+ */
+ if (common->cmnd[1] & ~0x10) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ verification_length = get_unaligned_be16(&common->cmnd[7]);
+ if (unlikely(verification_length == 0))
+ return -EIO; /* No default reply */
+
+ /* Prepare to carry out the file verify */
+ amount_left = verification_length << curlun->blkbits;
+ file_offset = ((loff_t) lba) << curlun->blkbits;
+
+ /* Write out all the dirty buffers before invalidating them */
+ fsg_lun_fsync_sub(curlun);
+ if (signal_pending(current))
+ return -EINTR;
+
+ invalidate_sub(curlun);
+ if (signal_pending(current))
+ return -EINTR;
+
+ /* Just try to read the requested blocks */
+ while (amount_left > 0) {
+ /*
+ * Figure out how much we need to read:
+ * Try to read the remaining amount, but not more than
+ * the buffer size.
+ * And don't try to read past the end of the file.
+ */
+ amount = min(amount_left, FSG_BUFLEN);
+ amount = min((loff_t)amount,
+ curlun->file_length - file_offset);
+ if (amount == 0) {
+ curlun->sense_data =
+ SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ curlun->sense_data_info =
+ file_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ break;
+ }
+
+ /* Perform the read */
+ file_offset_tmp = file_offset;
+ nread = vfs_read(curlun->filp,
+ (char __user *) bh->buf,
+ amount, &file_offset_tmp);
+ VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
+ (unsigned long long) file_offset,
+ (int) nread);
+ if (signal_pending(current))
+ return -EINTR;
+
+ if (nread < 0) {
+ LDBG(curlun, "error in file verify: %d\n", (int)nread);
+ nread = 0;
+ } else if (nread < amount) {
+ LDBG(curlun, "partial file verify: %d/%u\n",
+ (int)nread, amount);
+ nread = round_down(nread, curlun->blksize);
+ }
+ if (nread == 0) {
+ curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
+ curlun->sense_data_info =
+ file_offset >> curlun->blkbits;
+ curlun->info_valid = 1;
+ break;
+ }
+ file_offset += nread;
+ amount_left -= nread;
+ }
+ return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u8 *buf = (u8 *) bh->buf;
+
+ if (!curlun) { /* Unsupported LUNs are okay */
+ common->bad_lun_okay = 1;
+ memset(buf, 0, 36);
+ buf[0] = 0x7f; /* Unsupported, no device-type */
+ buf[4] = 31; /* Additional length */
+ return 36;
+ }
+
+ buf[0] = curlun->cdrom ? TYPE_ROM : TYPE_DISK;
+ buf[1] = curlun->removable ? 0x80 : 0;
+ buf[2] = 2; /* ANSI SCSI level 2 */
+ buf[3] = 2; /* SCSI-2 INQUIRY data format */
+ buf[4] = 31; /* Additional length */
+ buf[5] = 0; /* No special options */
+ buf[6] = 0;
+ buf[7] = 0;
+ memcpy(buf + 8, common->inquiry_string, sizeof common->inquiry_string);
+ return 36;
+}
+
+static int do_request_sense(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u8 *buf = (u8 *) bh->buf;
+ u32 sd, sdinfo;
+ int valid;
+
+ /*
+ * From the SCSI-2 spec., section 7.9 (Unit attention condition):
+ *
+ * If a REQUEST SENSE command is received from an initiator
+ * with a pending unit attention condition (before the target
+ * generates the contingent allegiance condition), then the
+ * target shall either:
+ * a) report any pending sense data and preserve the unit
+ * attention condition on the logical unit, or,
+ * b) report the unit attention condition, may discard any
+ * pending sense data, and clear the unit attention
+ * condition on the logical unit for that initiator.
+ *
+ * FSG normally uses option a); enable this code to use option b).
+ */
+#if 0
+ if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
+ curlun->sense_data = curlun->unit_attention_data;
+ curlun->unit_attention_data = SS_NO_SENSE;
+ }
+#endif
+
+ if (!curlun) { /* Unsupported LUNs are okay */
+ common->bad_lun_okay = 1;
+ sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
+ sdinfo = 0;
+ valid = 0;
+ } else {
+ sd = curlun->sense_data;
+ sdinfo = curlun->sense_data_info;
+ valid = curlun->info_valid << 7;
+ curlun->sense_data = SS_NO_SENSE;
+ curlun->sense_data_info = 0;
+ curlun->info_valid = 0;
+ }
+
+ memset(buf, 0, 18);
+ buf[0] = valid | 0x70; /* Valid, current error */
+ buf[2] = SK(sd);
+ put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */
+ buf[7] = 18 - 8; /* Additional sense length */
+ buf[12] = ASC(sd);
+ buf[13] = ASCQ(sd);
+ return 18;
+}
+
+static int do_read_capacity(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u32 lba = get_unaligned_be32(&common->cmnd[2]);
+ int pmi = common->cmnd[8];
+ u8 *buf = (u8 *)bh->buf;
+
+ /* Check the PMI and LBA fields */
+ if (pmi > 1 || (pmi == 0 && lba != 0)) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ put_unaligned_be32(curlun->num_sectors - 1, &buf[0]);
+ /* Max logical block */
+ put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */
+ return 8;
+}
+
+static int do_read_header(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ int msf = common->cmnd[1] & 0x02;
+ u32 lba = get_unaligned_be32(&common->cmnd[2]);
+ u8 *buf = (u8 *)bh->buf;
+
+ if (common->cmnd[1] & ~0x02) { /* Mask away MSF */
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+ if (lba >= curlun->num_sectors) {
+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ return -EINVAL;
+ }
+
+ memset(buf, 0, 8);
+ buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */
+ store_cdrom_address(&buf[4], msf, lba);
+ return 8;
+}
+
+static int do_read_toc(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ int msf = common->cmnd[1] & 0x02;
+ int start_track = common->cmnd[6];
+ u8 *buf = (u8 *)bh->buf;
+
+ if ((common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
+ start_track > 1) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ memset(buf, 0, 20);
+ buf[1] = (20-2); /* TOC data length */
+ buf[2] = 1; /* First track number */
+ buf[3] = 1; /* Last track number */
+ buf[5] = 0x16; /* Data track, copying allowed */
+ buf[6] = 0x01; /* Only track is number 1 */
+ store_cdrom_address(&buf[8], msf, 0);
+
+ buf[13] = 0x16; /* Lead-out track is data */
+ buf[14] = 0xAA; /* Lead-out track number */
+ store_cdrom_address(&buf[16], msf, curlun->num_sectors);
+ return 20;
+}
+
+static int do_mode_sense(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ int mscmnd = common->cmnd[0];
+ u8 *buf = (u8 *) bh->buf;
+ u8 *buf0 = buf;
+ int pc, page_code;
+ int changeable_values, all_pages;
+ int valid_page = 0;
+ int len, limit;
+
+ if ((common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+ pc = common->cmnd[2] >> 6;
+ page_code = common->cmnd[2] & 0x3f;
+ if (pc == 3) {
+ curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
+ return -EINVAL;
+ }
+ changeable_values = (pc == 1);
+ all_pages = (page_code == 0x3f);
+
+ /*
+ * Write the mode parameter header. Fixed values are: default
+ * medium type, no cache control (DPOFUA), and no block descriptors.
+ * The only variable value is the WriteProtect bit. We will fill in
+ * the mode data length later.
+ */
+ memset(buf, 0, 8);
+ if (mscmnd == MODE_SENSE) {
+ buf[2] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
+ buf += 4;
+ limit = 255;
+ } else { /* MODE_SENSE_10 */
+ buf[3] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
+ buf += 8;
+ limit = 65535; /* Should really be FSG_BUFLEN */
+ }
+
+ /* No block descriptors */
+
+ /*
+ * The mode pages, in numerical order. The only page we support
+ * is the Caching page.
+ */
+ if (page_code == 0x08 || all_pages) {
+ valid_page = 1;
+ buf[0] = 0x08; /* Page code */
+ buf[1] = 10; /* Page length */
+ memset(buf+2, 0, 10); /* None of the fields are changeable */
+
+ if (!changeable_values) {
+ buf[2] = 0x04; /* Write cache enable, */
+ /* Read cache not disabled */
+ /* No cache retention priorities */
+ put_unaligned_be16(0xffff, &buf[4]);
+ /* Don't disable prefetch */
+ /* Minimum prefetch = 0 */
+ put_unaligned_be16(0xffff, &buf[8]);
+ /* Maximum prefetch */
+ put_unaligned_be16(0xffff, &buf[10]);
+ /* Maximum prefetch ceiling */
+ }
+ buf += 12;
+ }
+
+ /*
+ * Check that a valid page was requested and the mode data length
+ * isn't too long.
+ */
+ len = buf - buf0;
+ if (!valid_page || len > limit) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ /* Store the mode data length */
+ if (mscmnd == MODE_SENSE)
+ buf0[0] = len - 1;
+ else
+ put_unaligned_be16(len - 2, buf0);
+ return len;
+}
+
+static int do_start_stop(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ int loej, start;
+
+ if (!curlun) {
+ return -EINVAL;
+ } else if (!curlun->removable) {
+ curlun->sense_data = SS_INVALID_COMMAND;
+ return -EINVAL;
+ } else if ((common->cmnd[1] & ~0x01) != 0 || /* Mask away Immed */
+ (common->cmnd[4] & ~0x03) != 0) { /* Mask LoEj, Start */
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ loej = common->cmnd[4] & 0x02;
+ start = common->cmnd[4] & 0x01;
+
+ /*
+ * Our emulation doesn't support mounting; the medium is
+ * available for use as soon as it is loaded.
+ */
+ if (start) {
+ if (!fsg_lun_is_open(curlun)) {
+ curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ /* Are we allowed to unload the media? */
+ if (curlun->prevent_medium_removal) {
+ LDBG(curlun, "unload attempt prevented\n");
+ curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
+ return -EINVAL;
+ }
+
+ if (!loej)
+ return 0;
+
+ up_read(&common->filesem);
+ down_write(&common->filesem);
+ fsg_lun_close(curlun);
+ up_write(&common->filesem);
+ down_read(&common->filesem);
+
+ return 0;
+}
+
+static int do_prevent_allow(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ int prevent;
+
+ if (!common->curlun) {
+ return -EINVAL;
+ } else if (!common->curlun->removable) {
+ common->curlun->sense_data = SS_INVALID_COMMAND;
+ return -EINVAL;
+ }
+
+ prevent = common->cmnd[4] & 0x01;
+ if ((common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ if (curlun->prevent_medium_removal && !prevent)
+ fsg_lun_fsync_sub(curlun);
+ curlun->prevent_medium_removal = prevent;
+ return 0;
+}
+
+static int do_read_format_capacities(struct fsg_common *common,
+ struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+ u8 *buf = (u8 *) bh->buf;
+
+ buf[0] = buf[1] = buf[2] = 0;
+ buf[3] = 8; /* Only the Current/Maximum Capacity Descriptor */
+ buf += 4;
+
+ put_unaligned_be32(curlun->num_sectors, &buf[0]);
+ /* Number of blocks */
+ put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */
+ buf[4] = 0x02; /* Current capacity */
+ return 12;
+}
+
+static int do_mode_select(struct fsg_common *common, struct fsg_buffhd *bh)
+{
+ struct fsg_lun *curlun = common->curlun;
+
+ /* We don't support MODE SELECT */
+ if (curlun)
+ curlun->sense_data = SS_INVALID_COMMAND;
+ return -EINVAL;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int halt_bulk_in_endpoint(struct fsg_dev *fsg)
+{
+ int rc;
+
+ rc = fsg_set_halt(fsg, fsg->bulk_in);
+ if (rc == -EAGAIN)
+ VDBG(fsg, "delayed bulk-in endpoint halt\n");
+ while (rc != 0) {
+ if (rc != -EAGAIN) {
+ WARNING(fsg, "usb_ep_set_halt -> %d\n", rc);
+ rc = 0;
+ break;
+ }
+
+ /* Wait for a short time and then try again */
+ if (msleep_interruptible(100) != 0)
+ return -EINTR;
+ rc = usb_ep_set_halt(fsg->bulk_in);
+ }
+ return rc;
+}
+
+static int wedge_bulk_in_endpoint(struct fsg_dev *fsg)
+{
+ int rc;
+
+ DBG(fsg, "bulk-in set wedge\n");
+ rc = usb_ep_set_wedge(fsg->bulk_in);
+ if (rc == -EAGAIN)
+ VDBG(fsg, "delayed bulk-in endpoint wedge\n");
+ while (rc != 0) {
+ if (rc != -EAGAIN) {
+ WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc);
+ rc = 0;
+ break;
+ }
+
+ /* Wait for a short time and then try again */
+ if (msleep_interruptible(100) != 0)
+ return -EINTR;
+ rc = usb_ep_set_wedge(fsg->bulk_in);
+ }
+ return rc;
+}
+
+static int throw_away_data(struct fsg_common *common)
+{
+ struct fsg_buffhd *bh;
+ u32 amount;
+ int rc;
+
+ for (bh = common->next_buffhd_to_drain;
+ bh->state != BUF_STATE_EMPTY || common->usb_amount_left > 0;
+ bh = common->next_buffhd_to_drain) {
+
+ /* Throw away the data in a filled buffer */
+ if (bh->state == BUF_STATE_FULL) {
+ smp_rmb();
+ bh->state = BUF_STATE_EMPTY;
+ common->next_buffhd_to_drain = bh->next;
+
+ /* A short packet or an error ends everything */
+ if (bh->outreq->actual < bh->bulk_out_intended_length ||
+ bh->outreq->status != 0) {
+ raise_exception(common,
+ FSG_STATE_ABORT_BULK_OUT);
+ return -EINTR;
+ }
+ continue;
+ }
+
+ /* Try to submit another request if we need one */
+ bh = common->next_buffhd_to_fill;
+ if (bh->state == BUF_STATE_EMPTY
+ && common->usb_amount_left > 0) {
+ amount = min(common->usb_amount_left, FSG_BUFLEN);
+
+ /*
+ * Except at the end of the transfer, amount will be
+ * equal to the buffer size, which is divisible by
+ * the bulk-out maxpacket size.
+ */
+ set_bulk_out_req_length(common, bh, amount);
+ if (!start_out_transfer(common, bh))
+ /* Dunno what to do if common->fsg is NULL */
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
+ common->usb_amount_left -= amount;
+ continue;
+ }
+
+ /* Otherwise wait for something to happen */
+ rc = sleep_thread(common, true);
+ if (rc)
+ return rc;
+ }
+ return 0;
+}
+
+static int finish_reply(struct fsg_common *common)
+{
+ struct fsg_buffhd *bh = common->next_buffhd_to_fill;
+ int rc = 0;
+
+ switch (common->data_dir) {
+ case DATA_DIR_NONE:
+ break; /* Nothing to send */
+
+ /*
+ * If we don't know whether the host wants to read or write,
+ * this must be CB or CBI with an unknown command. We mustn't
+ * try to send or receive any data. So stall both bulk pipes
+ * if we can and wait for a reset.
+ */
+ case DATA_DIR_UNKNOWN:
+ if (!common->can_stall) {
+ /* Nothing */
+ } else if (fsg_is_set(common)) {
+ fsg_set_halt(common->fsg, common->fsg->bulk_out);
+ rc = halt_bulk_in_endpoint(common->fsg);
+ } else {
+ /* Don't know what to do if common->fsg is NULL */
+ rc = -EIO;
+ }
+ break;
+
+ /* All but the last buffer of data must have already been sent */
+ case DATA_DIR_TO_HOST:
+ if (common->data_size == 0) {
+ /* Nothing to send */
+
+ /* Don't know what to do if common->fsg is NULL */
+ } else if (!fsg_is_set(common)) {
+ rc = -EIO;
+
+ /* If there's no residue, simply send the last buffer */
+ } else if (common->residue == 0) {
+ bh->inreq->zero = 0;
+ if (!start_in_transfer(common, bh))
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
+
+ /*
+ * For Bulk-only, mark the end of the data with a short
+ * packet. If we are allowed to stall, halt the bulk-in
+ * endpoint. (Note: This violates the Bulk-Only Transport
+ * specification, which requires us to pad the data if we
+ * don't halt the endpoint. Presumably nobody will mind.)
+ */
+ } else {
+ bh->inreq->zero = 1;
+ if (!start_in_transfer(common, bh))
+ rc = -EIO;
+ common->next_buffhd_to_fill = bh->next;
+ if (common->can_stall)
+ rc = halt_bulk_in_endpoint(common->fsg);
+ }
+ break;
+
+ /*
+ * We have processed all we want from the data the host has sent.
+ * There may still be outstanding bulk-out requests.
+ */
+ case DATA_DIR_FROM_HOST:
+ if (common->residue == 0) {
+ /* Nothing to receive */
+
+ /* Did the host stop sending unexpectedly early? */
+ } else if (common->short_packet_received) {
+ raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
+ rc = -EINTR;
+
+ /*
+ * We haven't processed all the incoming data. Even though
+ * we may be allowed to stall, doing so would cause a race.
+ * The controller may already have ACK'ed all the remaining
+ * bulk-out packets, in which case the host wouldn't see a
+ * STALL. Not realizing the endpoint was halted, it wouldn't
+ * clear the halt -- leading to problems later on.
+ */
+#if 0
+ } else if (common->can_stall) {
+ if (fsg_is_set(common))
+ fsg_set_halt(common->fsg,
+ common->fsg->bulk_out);
+ raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
+ rc = -EINTR;
+#endif
+
+ /*
+ * We can't stall. Read in the excess data and throw it
+ * all away.
+ */
+ } else {
+ rc = throw_away_data(common);
+ }
+ break;
+ }
+ return rc;
+}
+
+static int send_status(struct fsg_common *common)
+{
+ struct fsg_lun *curlun = common->curlun;
+ struct fsg_buffhd *bh;
+ struct bulk_cs_wrap *csw;
+ int rc;
+ u8 status = US_BULK_STAT_OK;
+ u32 sd, sdinfo = 0;
+
+ /* Wait for the next buffer to become available */
+ bh = common->next_buffhd_to_fill;
+ while (bh->state != BUF_STATE_EMPTY) {
+ rc = sleep_thread(common, true);
+ if (rc)
+ return rc;
+ }
+
+ if (curlun) {
+ sd = curlun->sense_data;
+ sdinfo = curlun->sense_data_info;
+ } else if (common->bad_lun_okay)
+ sd = SS_NO_SENSE;
+ else
+ sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
+
+ if (common->phase_error) {
+ DBG(common, "sending phase-error status\n");
+ status = US_BULK_STAT_PHASE;
+ sd = SS_INVALID_COMMAND;
+ } else if (sd != SS_NO_SENSE) {
+ DBG(common, "sending command-failure status\n");
+ status = US_BULK_STAT_FAIL;
+ VDBG(common, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
+ " info x%x\n",
+ SK(sd), ASC(sd), ASCQ(sd), sdinfo);
+ }
+
+ /* Store and send the Bulk-only CSW */
+ csw = (void *)bh->buf;
+
+ csw->Signature = cpu_to_le32(US_BULK_CS_SIGN);
+ csw->Tag = common->tag;
+ csw->Residue = cpu_to_le32(common->residue);
+ csw->Status = status;
+
+ bh->inreq->length = US_BULK_CS_WRAP_LEN;
+ bh->inreq->zero = 0;
+ if (!start_in_transfer(common, bh))
+ /* Don't know what to do if common->fsg is NULL */
+ return -EIO;
+
+ common->next_buffhd_to_fill = bh->next;
+ return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Check whether the command is properly formed and whether its data size
+ * and direction agree with the values we already have.
+ */
+static int check_command(struct fsg_common *common, int cmnd_size,
+ enum data_direction data_dir, unsigned int mask,
+ int needs_medium, const char *name)
+{
+ int i;
+ unsigned int lun = common->cmnd[1] >> 5;
+ static const char dirletter[4] = {'u', 'o', 'i', 'n'};
+ char hdlen[20];
+ struct fsg_lun *curlun;
+
+ hdlen[0] = 0;
+ if (common->data_dir != DATA_DIR_UNKNOWN)
+ sprintf(hdlen, ", H%c=%u", dirletter[(int) common->data_dir],
+ common->data_size);
+ VDBG(common, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
+ name, cmnd_size, dirletter[(int) data_dir],
+ common->data_size_from_cmnd, common->cmnd_size, hdlen);
+
+ /*
+ * We can't reply at all until we know the correct data direction
+ * and size.
+ */
+ if (common->data_size_from_cmnd == 0)
+ data_dir = DATA_DIR_NONE;
+ if (common->data_size < common->data_size_from_cmnd) {
+ /*
+ * Host data size < Device data size is a phase error.
+ * Carry out the command, but only transfer as much as
+ * we are allowed.
+ */
+ common->data_size_from_cmnd = common->data_size;
+ common->phase_error = 1;
+ }
+ common->residue = common->data_size;
+ common->usb_amount_left = common->data_size;
+
+ /* Conflicting data directions is a phase error */
+ if (common->data_dir != data_dir && common->data_size_from_cmnd > 0) {
+ common->phase_error = 1;
+ return -EINVAL;
+ }
+
+ /* Verify the length of the command itself */
+ if (cmnd_size != common->cmnd_size) {
+
+ /*
+ * Special case workaround: There are plenty of buggy SCSI
+ * implementations. Many have issues with cbw->Length
+ * field passing a wrong command size. For those cases we
+ * always try to work around the problem by using the length
+ * sent by the host side provided it is at least as large
+ * as the correct command length.
+ * Examples of such cases would be MS-Windows, which issues
+ * REQUEST SENSE with cbw->Length == 12 where it should
+ * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and
+ * REQUEST SENSE with cbw->Length == 10 where it should
+ * be 6 as well.
+ */
+ if (cmnd_size <= common->cmnd_size) {
+ DBG(common, "%s is buggy! Expected length %d "
+ "but we got %d\n", name,
+ cmnd_size, common->cmnd_size);
+ cmnd_size = common->cmnd_size;
+ } else {
+ common->phase_error = 1;
+ return -EINVAL;
+ }
+ }
+
+ /* Check that the LUN values are consistent */
+ if (common->lun != lun)
+ DBG(common, "using LUN %u from CBW, not LUN %u from CDB\n",
+ common->lun, lun);
+
+ /* Check the LUN */
+ curlun = common->curlun;
+ if (curlun) {
+ if (common->cmnd[0] != REQUEST_SENSE) {
+ curlun->sense_data = SS_NO_SENSE;
+ curlun->sense_data_info = 0;
+ curlun->info_valid = 0;
+ }
+ } else {
+ common->bad_lun_okay = 0;
+
+ /*
+ * INQUIRY and REQUEST SENSE commands are explicitly allowed
+ * to use unsupported LUNs; all others may not.
+ */
+ if (common->cmnd[0] != INQUIRY &&
+ common->cmnd[0] != REQUEST_SENSE) {
+ DBG(common, "unsupported LUN %u\n", common->lun);
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * If a unit attention condition exists, only INQUIRY and
+ * REQUEST SENSE commands are allowed; anything else must fail.
+ */
+ if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
+ common->cmnd[0] != INQUIRY &&
+ common->cmnd[0] != REQUEST_SENSE) {
+ curlun->sense_data = curlun->unit_attention_data;
+ curlun->unit_attention_data = SS_NO_SENSE;
+ return -EINVAL;
+ }
+
+ /* Check that only command bytes listed in the mask are non-zero */
+ common->cmnd[1] &= 0x1f; /* Mask away the LUN */
+ for (i = 1; i < cmnd_size; ++i) {
+ if (common->cmnd[i] && !(mask & (1 << i))) {
+ if (curlun)
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+ }
+
+ /* If the medium isn't mounted and the command needs to access
+ * it, return an error. */
+ if (curlun && !fsg_lun_is_open(curlun) && needs_medium) {
+ curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* wrapper of check_command for data size in blocks handling */
+static int check_command_size_in_blocks(struct fsg_common *common,
+ int cmnd_size, enum data_direction data_dir,
+ unsigned int mask, int needs_medium, const char *name)
+{
+ if (common->curlun)
+ common->data_size_from_cmnd <<= common->curlun->blkbits;
+ return check_command(common, cmnd_size, data_dir,
+ mask, needs_medium, name);
+}
+
+static int do_scsi_command(struct fsg_common *common)
+{
+ struct fsg_buffhd *bh;
+ int rc;
+ int reply = -EINVAL;
+ int i;
+ static char unknown[16];
+
+ dump_cdb(common);
+
+ /* Wait for the next buffer to become available for data or status */
+ bh = common->next_buffhd_to_fill;
+ common->next_buffhd_to_drain = bh;
+ while (bh->state != BUF_STATE_EMPTY) {
+ rc = sleep_thread(common, true);
+ if (rc)
+ return rc;
+ }
+ common->phase_error = 0;
+ common->short_packet_received = 0;
+
+ down_read(&common->filesem); /* We're using the backing file */
+ switch (common->cmnd[0]) {
+
+ case INQUIRY:
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
+ (1<<4), 0,
+ "INQUIRY");
+ if (reply == 0)
+ reply = do_inquiry(common, bh);
+ break;
+
+ case MODE_SELECT:
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_FROM_HOST,
+ (1<<1) | (1<<4), 0,
+ "MODE SELECT(6)");
+ if (reply == 0)
+ reply = do_mode_select(common, bh);
+ break;
+
+ case MODE_SELECT_10:
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_FROM_HOST,
+ (1<<1) | (3<<7), 0,
+ "MODE SELECT(10)");
+ if (reply == 0)
+ reply = do_mode_select(common, bh);
+ break;
+
+ case MODE_SENSE:
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
+ (1<<1) | (1<<2) | (1<<4), 0,
+ "MODE SENSE(6)");
+ if (reply == 0)
+ reply = do_mode_sense(common, bh);
+ break;
+
+ case MODE_SENSE_10:
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
+ (1<<1) | (1<<2) | (3<<7), 0,
+ "MODE SENSE(10)");
+ if (reply == 0)
+ reply = do_mode_sense(common, bh);
+ break;
+
+ case ALLOW_MEDIUM_REMOVAL:
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 6, DATA_DIR_NONE,
+ (1<<4), 0,
+ "PREVENT-ALLOW MEDIUM REMOVAL");
+ if (reply == 0)
+ reply = do_prevent_allow(common);
+ break;
+
+ case READ_6:
+ i = common->cmnd[4];
+ common->data_size_from_cmnd = (i == 0) ? 256 : i;
+ reply = check_command_size_in_blocks(common, 6,
+ DATA_DIR_TO_HOST,
+ (7<<1) | (1<<4), 1,
+ "READ(6)");
+ if (reply == 0)
+ reply = do_read(common);
+ break;
+
+ case READ_10:
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command_size_in_blocks(common, 10,
+ DATA_DIR_TO_HOST,
+ (1<<1) | (0xf<<2) | (3<<7), 1,
+ "READ(10)");
+ if (reply == 0)
+ reply = do_read(common);
+ break;
+
+ case READ_12:
+ common->data_size_from_cmnd =
+ get_unaligned_be32(&common->cmnd[6]);
+ reply = check_command_size_in_blocks(common, 12,
+ DATA_DIR_TO_HOST,
+ (1<<1) | (0xf<<2) | (0xf<<6), 1,
+ "READ(12)");
+ if (reply == 0)
+ reply = do_read(common);
+ break;
+
+ case READ_CAPACITY:
+ common->data_size_from_cmnd = 8;
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
+ (0xf<<2) | (1<<8), 1,
+ "READ CAPACITY");
+ if (reply == 0)
+ reply = do_read_capacity(common, bh);
+ break;
+
+ case READ_HEADER:
+ if (!common->curlun || !common->curlun->cdrom)
+ goto unknown_cmnd;
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
+ (3<<7) | (0x1f<<1), 1,
+ "READ HEADER");
+ if (reply == 0)
+ reply = do_read_header(common, bh);
+ break;
+
+ case READ_TOC:
+ if (!common->curlun || !common->curlun->cdrom)
+ goto unknown_cmnd;
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
+ (7<<6) | (1<<1), 1,
+ "READ TOC");
+ if (reply == 0)
+ reply = do_read_toc(common, bh);
+ break;
+
+ case READ_FORMAT_CAPACITIES:
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
+ (3<<7), 1,
+ "READ FORMAT CAPACITIES");
+ if (reply == 0)
+ reply = do_read_format_capacities(common, bh);
+ break;
+
+ case REQUEST_SENSE:
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
+ (1<<4), 0,
+ "REQUEST SENSE");
+ if (reply == 0)
+ reply = do_request_sense(common, bh);
+ break;
+
+ case START_STOP:
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 6, DATA_DIR_NONE,
+ (1<<1) | (1<<4), 0,
+ "START-STOP UNIT");
+ if (reply == 0)
+ reply = do_start_stop(common);
+ break;
+
+ case SYNCHRONIZE_CACHE:
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 10, DATA_DIR_NONE,
+ (0xf<<2) | (3<<7), 1,
+ "SYNCHRONIZE CACHE");
+ if (reply == 0)
+ reply = do_synchronize_cache(common);
+ break;
+
+ case TEST_UNIT_READY:
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 6, DATA_DIR_NONE,
+ 0, 1,
+ "TEST UNIT READY");
+ break;
+
+ /*
+ * Although optional, this command is used by MS-Windows. We
+ * support a minimal version: BytChk must be 0.
+ */
+ case VERIFY:
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 10, DATA_DIR_NONE,
+ (1<<1) | (0xf<<2) | (3<<7), 1,
+ "VERIFY");
+ if (reply == 0)
+ reply = do_verify(common);
+ break;
+
+ case WRITE_6:
+ i = common->cmnd[4];
+ common->data_size_from_cmnd = (i == 0) ? 256 : i;
+ reply = check_command_size_in_blocks(common, 6,
+ DATA_DIR_FROM_HOST,
+ (7<<1) | (1<<4), 1,
+ "WRITE(6)");
+ if (reply == 0)
+ reply = do_write(common);
+ break;
+
+ case WRITE_10:
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command_size_in_blocks(common, 10,
+ DATA_DIR_FROM_HOST,
+ (1<<1) | (0xf<<2) | (3<<7), 1,
+ "WRITE(10)");
+ if (reply == 0)
+ reply = do_write(common);
+ break;
+
+ case WRITE_12:
+ common->data_size_from_cmnd =
+ get_unaligned_be32(&common->cmnd[6]);
+ reply = check_command_size_in_blocks(common, 12,
+ DATA_DIR_FROM_HOST,
+ (1<<1) | (0xf<<2) | (0xf<<6), 1,
+ "WRITE(12)");
+ if (reply == 0)
+ reply = do_write(common);
+ break;
+
+ /*
+ * Some mandatory commands that we recognize but don't implement.
+ * They don't mean much in this setting. It's left as an exercise
+ * for anyone interested to implement RESERVE and RELEASE in terms
+ * of Posix locks.
+ */
+ case FORMAT_UNIT:
+ case RELEASE:
+ case RESERVE:
+ case SEND_DIAGNOSTIC:
+ /* Fall through */
+
+ default:
+unknown_cmnd:
+ common->data_size_from_cmnd = 0;
+ sprintf(unknown, "Unknown x%02x", common->cmnd[0]);
+ reply = check_command(common, common->cmnd_size,
+ DATA_DIR_UNKNOWN, ~0, 0, unknown);
+ if (reply == 0) {
+ common->curlun->sense_data = SS_INVALID_COMMAND;
+ reply = -EINVAL;
+ }
+ break;
+ }
+ up_read(&common->filesem);
+
+ if (reply == -EINTR || signal_pending(current))
+ return -EINTR;
+
+ /* Set up the single reply buffer for finish_reply() */
+ if (reply == -EINVAL)
+ reply = 0; /* Error reply length */
+ if (reply >= 0 && common->data_dir == DATA_DIR_TO_HOST) {
+ reply = min((u32)reply, common->data_size_from_cmnd);
+ bh->inreq->length = reply;
+ bh->state = BUF_STATE_FULL;
+ common->residue -= reply;
+ } /* Otherwise it's already set */
+
+ return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+ struct usb_request *req = bh->outreq;
+ struct bulk_cb_wrap *cbw = req->buf;
+ struct fsg_common *common = fsg->common;
+
+ /* Was this a real packet? Should it be ignored? */
+ if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
+ return -EINVAL;
+
+ /* Is the CBW valid? */
+ if (req->actual != US_BULK_CB_WRAP_LEN ||
+ cbw->Signature != cpu_to_le32(
+ US_BULK_CB_SIGN)) {
+ DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
+ req->actual,
+ le32_to_cpu(cbw->Signature));
+
+ /*
+ * The Bulk-only spec says we MUST stall the IN endpoint
+ * (6.6.1), so it's unavoidable. It also says we must
+ * retain this state until the next reset, but there's
+ * no way to tell the controller driver it should ignore
+ * Clear-Feature(HALT) requests.
+ *
+ * We aren't required to halt the OUT endpoint; instead
+ * we can simply accept and discard any data received
+ * until the next reset.
+ */
+ wedge_bulk_in_endpoint(fsg);
+ set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
+ return -EINVAL;
+ }
+
+ /* Is the CBW meaningful? */
+ if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN ||
+ cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) {
+ DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
+ "cmdlen %u\n",
+ cbw->Lun, cbw->Flags, cbw->Length);
+
+ /*
+ * We can do anything we want here, so let's stall the
+ * bulk pipes if we are allowed to.
+ */
+ if (common->can_stall) {
+ fsg_set_halt(fsg, fsg->bulk_out);
+ halt_bulk_in_endpoint(fsg);
+ }
+ return -EINVAL;
+ }
+
+ /* Save the command for later */
+ common->cmnd_size = cbw->Length;
+ memcpy(common->cmnd, cbw->CDB, common->cmnd_size);
+ if (cbw->Flags & US_BULK_FLAG_IN)
+ common->data_dir = DATA_DIR_TO_HOST;
+ else
+ common->data_dir = DATA_DIR_FROM_HOST;
+ common->data_size = le32_to_cpu(cbw->DataTransferLength);
+ if (common->data_size == 0)
+ common->data_dir = DATA_DIR_NONE;
+ common->lun = cbw->Lun;
+ if (common->lun < common->nluns)
+ common->curlun = common->luns[common->lun];
+ else
+ common->curlun = NULL;
+ common->tag = cbw->Tag;
+ return 0;
+}
+
+static int get_next_command(struct fsg_common *common)
+{
+ struct fsg_buffhd *bh;
+ int rc = 0;
+
+ /* Wait for the next buffer to become available */
+ bh = common->next_buffhd_to_fill;
+ while (bh->state != BUF_STATE_EMPTY) {
+ rc = sleep_thread(common, true);
+ if (rc)
+ return rc;
+ }
+
+ /* Queue a request to read a Bulk-only CBW */
+ set_bulk_out_req_length(common, bh, US_BULK_CB_WRAP_LEN);
+ if (!start_out_transfer(common, bh))
+ /* Don't know what to do if common->fsg is NULL */
+ return -EIO;
+
+ /*
+ * We will drain the buffer in software, which means we
+ * can reuse it for the next filling. No need to advance
+ * next_buffhd_to_fill.
+ */
+
+ /* Wait for the CBW to arrive */
+ while (bh->state != BUF_STATE_FULL) {
+ rc = sleep_thread(common, true);
+ if (rc)
+ return rc;
+ }
+ smp_rmb();
+ rc = fsg_is_set(common) ? received_cbw(common->fsg, bh) : -EIO;
+ bh->state = BUF_STATE_EMPTY;
+
+ return rc;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int alloc_request(struct fsg_common *common, struct usb_ep *ep,
+ struct usb_request **preq)
+{
+ *preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
+ if (*preq)
+ return 0;
+ ERROR(common, "can't allocate request for %s\n", ep->name);
+ return -ENOMEM;
+}
+
+/* Reset interface setting and re-init endpoint state (toggle etc). */
+static int do_set_interface(struct fsg_common *common, struct fsg_dev *new_fsg)
+{
+ struct fsg_dev *fsg;
+ int i, rc = 0;
+
+ if (common->running)
+ DBG(common, "reset interface\n");
+
+reset:
+ /* Deallocate the requests */
+ if (common->fsg) {
+ fsg = common->fsg;
+
+ for (i = 0; i < common->fsg_num_buffers; ++i) {
+ struct fsg_buffhd *bh = &common->buffhds[i];
+
+ if (bh->inreq) {
+ usb_ep_free_request(fsg->bulk_in, bh->inreq);
+ bh->inreq = NULL;
+ }
+ if (bh->outreq) {
+ usb_ep_free_request(fsg->bulk_out, bh->outreq);
+ bh->outreq = NULL;
+ }
+ }
+
+ /* Disable the endpoints */
+ if (fsg->bulk_in_enabled) {
+ usb_ep_disable(fsg->bulk_in);
+ fsg->bulk_in->driver_data = NULL;
+ fsg->bulk_in_enabled = 0;
+ }
+ if (fsg->bulk_out_enabled) {
+ usb_ep_disable(fsg->bulk_out);
+ fsg->bulk_out->driver_data = NULL;
+ fsg->bulk_out_enabled = 0;
+ }
+
+ common->fsg = NULL;
+ wake_up(&common->fsg_wait);
+ }
+
+ common->running = 0;
+ if (!new_fsg || rc)
+ return rc;
+
+ common->fsg = new_fsg;
+ fsg = common->fsg;
+
+ /* Enable the endpoints */
+ rc = config_ep_by_speed(common->gadget, &(fsg->function), fsg->bulk_in);
+ if (rc)
+ goto reset;
+ rc = usb_ep_enable(fsg->bulk_in);
+ if (rc)
+ goto reset;
+ fsg->bulk_in->driver_data = common;
+ fsg->bulk_in_enabled = 1;
+
+ rc = config_ep_by_speed(common->gadget, &(fsg->function),
+ fsg->bulk_out);
+ if (rc)
+ goto reset;
+ rc = usb_ep_enable(fsg->bulk_out);
+ if (rc)
+ goto reset;
+ fsg->bulk_out->driver_data = common;
+ fsg->bulk_out_enabled = 1;
+ common->bulk_out_maxpacket = usb_endpoint_maxp(fsg->bulk_out->desc);
+ clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
+
+ /* Allocate the requests */
+ for (i = 0; i < common->fsg_num_buffers; ++i) {
+ struct fsg_buffhd *bh = &common->buffhds[i];
+
+ rc = alloc_request(common, fsg->bulk_in, &bh->inreq);
+ if (rc)
+ goto reset;
+ rc = alloc_request(common, fsg->bulk_out, &bh->outreq);
+ if (rc)
+ goto reset;
+ bh->inreq->buf = bh->outreq->buf = bh->buf;
+ bh->inreq->context = bh->outreq->context = bh;
+ bh->inreq->complete = bulk_in_complete;
+ bh->outreq->complete = bulk_out_complete;
+ }
+
+ common->running = 1;
+ for (i = 0; i < common->nluns; ++i)
+ if (common->luns[i])
+ common->luns[i]->unit_attention_data =
+ SS_RESET_OCCURRED;
+ return rc;
+}
+
+
+/****************************** ALT CONFIGS ******************************/
+
+static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct fsg_dev *fsg = fsg_from_func(f);
+ fsg->common->new_fsg = fsg;
+ raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
+ return USB_GADGET_DELAYED_STATUS;
+}
+
+static void fsg_disable(struct usb_function *f)
+{
+ struct fsg_dev *fsg = fsg_from_func(f);
+ fsg->common->new_fsg = NULL;
+ raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static void handle_exception(struct fsg_common *common)
+{
+ siginfo_t info;
+ int i;
+ struct fsg_buffhd *bh;
+ enum fsg_state old_state;
+ struct fsg_lun *curlun;
+ unsigned int exception_req_tag;
+
+ /*
+ * Clear the existing signals. Anything but SIGUSR1 is converted
+ * into a high-priority EXIT exception.
+ */
+ for (;;) {
+ int sig =
+ dequeue_signal_lock(current, ¤t->blocked, &info);
+ if (!sig)
+ break;
+ if (sig != SIGUSR1) {
+ if (common->state < FSG_STATE_EXIT)
+ DBG(common, "Main thread exiting on signal\n");
+ raise_exception(common, FSG_STATE_EXIT);
+ }
+ }
+
+ /* Cancel all the pending transfers */
+ if (likely(common->fsg)) {
+ for (i = 0; i < common->fsg_num_buffers; ++i) {
+ bh = &common->buffhds[i];
+ if (bh->inreq_busy)
+ usb_ep_dequeue(common->fsg->bulk_in, bh->inreq);
+ if (bh->outreq_busy)
+ usb_ep_dequeue(common->fsg->bulk_out,
+ bh->outreq);
+ }
+
+ /* Wait until everything is idle */
+ for (;;) {
+ int num_active = 0;
+ for (i = 0; i < common->fsg_num_buffers; ++i) {
+ bh = &common->buffhds[i];
+ num_active += bh->inreq_busy + bh->outreq_busy;
+ }
+ if (num_active == 0)
+ break;
+ if (sleep_thread(common, true))
+ return;
+ }
+
+ /* Clear out the controller's fifos */
+ if (common->fsg->bulk_in_enabled)
+ usb_ep_fifo_flush(common->fsg->bulk_in);
+ if (common->fsg->bulk_out_enabled)
+ usb_ep_fifo_flush(common->fsg->bulk_out);
+ }
+
+ /*
+ * Reset the I/O buffer states and pointers, the SCSI
+ * state, and the exception. Then invoke the handler.
+ */
+ spin_lock_irq(&common->lock);
+
+ for (i = 0; i < common->fsg_num_buffers; ++i) {
+ bh = &common->buffhds[i];
+ bh->state = BUF_STATE_EMPTY;
+ }
+ common->next_buffhd_to_fill = &common->buffhds[0];
+ common->next_buffhd_to_drain = &common->buffhds[0];
+ exception_req_tag = common->exception_req_tag;
+ old_state = common->state;
+
+ if (old_state == FSG_STATE_ABORT_BULK_OUT)
+ common->state = FSG_STATE_STATUS_PHASE;
+ else {
+ for (i = 0; i < common->nluns; ++i) {
+ curlun = common->luns[i];
+ if (!curlun)
+ continue;
+ curlun->prevent_medium_removal = 0;
+ curlun->sense_data = SS_NO_SENSE;
+ curlun->unit_attention_data = SS_NO_SENSE;
+ curlun->sense_data_info = 0;
+ curlun->info_valid = 0;
+ }
+ common->state = FSG_STATE_IDLE;
+ }
+ spin_unlock_irq(&common->lock);
+
+ /* Carry out any extra actions required for the exception */
+ switch (old_state) {
+ case FSG_STATE_ABORT_BULK_OUT:
+ send_status(common);
+ spin_lock_irq(&common->lock);
+ if (common->state == FSG_STATE_STATUS_PHASE)
+ common->state = FSG_STATE_IDLE;
+ spin_unlock_irq(&common->lock);
+ break;
+
+ case FSG_STATE_RESET:
+ /*
+ * In case we were forced against our will to halt a
+ * bulk endpoint, clear the halt now. (The SuperH UDC
+ * requires this.)
+ */
+ if (!fsg_is_set(common))
+ break;
+ if (test_and_clear_bit(IGNORE_BULK_OUT,
+ &common->fsg->atomic_bitflags))
+ usb_ep_clear_halt(common->fsg->bulk_in);
+
+ if (common->ep0_req_tag == exception_req_tag)
+ ep0_queue(common); /* Complete the status stage */
+
+ /*
+ * Technically this should go here, but it would only be
+ * a waste of time. Ditto for the INTERFACE_CHANGE and
+ * CONFIG_CHANGE cases.
+ */
+ /* for (i = 0; i < common->nluns; ++i) */
+ /* if (common->luns[i]) */
+ /* common->luns[i]->unit_attention_data = */
+ /* SS_RESET_OCCURRED; */
+ break;
+
+ case FSG_STATE_CONFIG_CHANGE:
+ do_set_interface(common, common->new_fsg);
+ if (common->new_fsg)
+ usb_composite_setup_continue(common->cdev);
+ break;
+
+ case FSG_STATE_EXIT:
+ case FSG_STATE_TERMINATED:
+ do_set_interface(common, NULL); /* Free resources */
+ spin_lock_irq(&common->lock);
+ common->state = FSG_STATE_TERMINATED; /* Stop the thread */
+ spin_unlock_irq(&common->lock);
+ break;
+
+ case FSG_STATE_INTERFACE_CHANGE:
+ case FSG_STATE_DISCONNECT:
+ case FSG_STATE_COMMAND_PHASE:
+ case FSG_STATE_DATA_PHASE:
+ case FSG_STATE_STATUS_PHASE:
+ case FSG_STATE_IDLE:
+ break;
+ }
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int fsg_main_thread(void *common_)
+{
+ struct fsg_common *common = common_;
+
+ /*
+ * Allow the thread to be killed by a signal, but set the signal mask
+ * to block everything but INT, TERM, KILL, and USR1.
+ */
+ allow_signal(SIGINT);
+ allow_signal(SIGTERM);
+ allow_signal(SIGKILL);
+ allow_signal(SIGUSR1);
+
+ /* Allow the thread to be frozen */
+ set_freezable();
+
+ /*
+ * Arrange for userspace references to be interpreted as kernel
+ * pointers. That way we can pass a kernel pointer to a routine
+ * that expects a __user pointer and it will work okay.
+ */
+ set_fs(get_ds());
+
+ /* The main loop */
+ while (common->state != FSG_STATE_TERMINATED) {
+ if (exception_in_progress(common) || signal_pending(current)) {
+ handle_exception(common);
+ continue;
+ }
+
+ if (!common->running) {
+ sleep_thread(common, true);
+ continue;
+ }
+
+ if (get_next_command(common))
+ continue;
+
+ spin_lock_irq(&common->lock);
+ if (!exception_in_progress(common))
+ common->state = FSG_STATE_DATA_PHASE;
+ spin_unlock_irq(&common->lock);
+
+ if (do_scsi_command(common) || finish_reply(common))
+ continue;
+
+ spin_lock_irq(&common->lock);
+ if (!exception_in_progress(common))
+ common->state = FSG_STATE_STATUS_PHASE;
+ spin_unlock_irq(&common->lock);
+
+ if (send_status(common))
+ continue;
+
+ spin_lock_irq(&common->lock);
+ if (!exception_in_progress(common))
+ common->state = FSG_STATE_IDLE;
+ spin_unlock_irq(&common->lock);
+ }
+
+ spin_lock_irq(&common->lock);
+ common->thread_task = NULL;
+ spin_unlock_irq(&common->lock);
+
+ if (!common->ops || !common->ops->thread_exits
+ || common->ops->thread_exits(common) < 0) {
+ struct fsg_lun **curlun_it = common->luns;
+ unsigned i = common->nluns;
+
+ down_write(&common->filesem);
+ for (; i--; ++curlun_it) {
+ struct fsg_lun *curlun = *curlun_it;
+ if (!curlun || !fsg_lun_is_open(curlun))
+ continue;
+
+ fsg_lun_close(curlun);
+ curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
+ }
+ up_write(&common->filesem);
+ }
+
+ /* Let fsg_unbind() know the thread has exited */
+ complete_and_exit(&common->thread_notifier, 0);
+}
+
+
+/*************************** DEVICE ATTRIBUTES ***************************/
+
+static ssize_t ro_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+
+ return fsg_show_ro(curlun, buf);
+}
+
+static ssize_t nofua_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+
+ return fsg_show_nofua(curlun, buf);
+}
+
+static ssize_t file_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ struct rw_semaphore *filesem = dev_get_drvdata(dev);
+
+ return fsg_show_file(curlun, filesem, buf);
+}
+
+static ssize_t ro_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ struct rw_semaphore *filesem = dev_get_drvdata(dev);
+
+ return fsg_store_ro(curlun, filesem, buf, count);
+}
+
+static ssize_t nofua_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+
+ return fsg_store_nofua(curlun, buf, count);
+}
+
+static ssize_t file_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ struct rw_semaphore *filesem = dev_get_drvdata(dev);
+
+ return fsg_store_file(curlun, filesem, buf, count);
+}
+
+static DEVICE_ATTR_RW(ro);
+static DEVICE_ATTR_RW(nofua);
+static DEVICE_ATTR_RW(file);
+
+static struct device_attribute dev_attr_ro_cdrom = __ATTR_RO(ro);
+static struct device_attribute dev_attr_file_nonremovable = __ATTR_RO(file);
+
+
+/****************************** FSG COMMON ******************************/
+
+static void fsg_common_release(struct kref *ref);
+
+static void fsg_lun_release(struct device *dev)
+{
+ /* Nothing needs to be done */
+}
+
+void fsg_common_get(struct fsg_common *common)
+{
+ kref_get(&common->ref);
+}
+EXPORT_SYMBOL_GPL(fsg_common_get);
+
+void fsg_common_put(struct fsg_common *common)
+{
+ kref_put(&common->ref, fsg_common_release);
+}
+EXPORT_SYMBOL_GPL(fsg_common_put);
+
+/* check if fsg_num_buffers is within a valid range */
+static inline int fsg_num_buffers_validate(unsigned int fsg_num_buffers)
+{
+ if (fsg_num_buffers >= 2 && fsg_num_buffers <= 4)
+ return 0;
+ pr_err("fsg_num_buffers %u is out of range (%d to %d)\n",
+ fsg_num_buffers, 2, 4);
+ return -EINVAL;
+}
+
+static struct fsg_common *fsg_common_setup(struct fsg_common *common)
+{
+ if (!common) {
+ common = kzalloc(sizeof(*common), GFP_KERNEL);
+ if (!common)
+ return ERR_PTR(-ENOMEM);
+ common->free_storage_on_release = 1;
+ } else {
+ common->free_storage_on_release = 0;
+ }
+ init_rwsem(&common->filesem);
+ spin_lock_init(&common->lock);
+ kref_init(&common->ref);
+ init_completion(&common->thread_notifier);
+ init_waitqueue_head(&common->fsg_wait);
+ common->state = FSG_STATE_TERMINATED;
+
+ return common;
+}
+
+void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs)
+{
+ common->sysfs = sysfs;
+}
+EXPORT_SYMBOL_GPL(fsg_common_set_sysfs);
+
+static void _fsg_common_free_buffers(struct fsg_buffhd *buffhds, unsigned n)
+{
+ if (buffhds) {
+ struct fsg_buffhd *bh = buffhds;
+ while (n--) {
+ kfree(bh->buf);
+ ++bh;
+ }
+ kfree(buffhds);
+ }
+}
+
+int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n)
+{
+ struct fsg_buffhd *bh, *buffhds;
+ int i, rc;
+
+ rc = fsg_num_buffers_validate(n);
+ if (rc != 0)
+ return rc;
+
+ buffhds = kcalloc(n, sizeof(*buffhds), GFP_KERNEL);
+ if (!buffhds)
+ return -ENOMEM;
+
+ /* Data buffers cyclic list */
+ bh = buffhds;
+ i = n;
+ goto buffhds_first_it;
+ do {
+ bh->next = bh + 1;
+ ++bh;
+buffhds_first_it:
+ bh->buf = kmalloc(FSG_BUFLEN, GFP_KERNEL);
+ if (unlikely(!bh->buf))
+ goto error_release;
+ } while (--i);
+ bh->next = buffhds;
+
+ _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
+ common->fsg_num_buffers = n;
+ common->buffhds = buffhds;
+
+ return 0;
+
+error_release:
+ /*
+ * "buf"s pointed to by heads after n - i are NULL
+ * so releasing them won't hurt
+ */
+ _fsg_common_free_buffers(buffhds, n);
+
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(fsg_common_set_num_buffers);
+
+static inline void fsg_common_remove_sysfs(struct fsg_lun *lun)
+{
+ device_remove_file(&lun->dev, &dev_attr_nofua);
+ /*
+ * device_remove_file() =>
+ *
+ * here the attr (e.g. dev_attr_ro) is only used to be passed to:
+ *
+ * sysfs_remove_file() =>
+ *
+ * here e.g. both dev_attr_ro_cdrom and dev_attr_ro are in
+ * the same namespace and
+ * from here only attr->name is passed to:
+ *
+ * sysfs_hash_and_remove()
+ *
+ * attr->name is the same for dev_attr_ro_cdrom and
+ * dev_attr_ro
+ * attr->name is the same for dev_attr_file and
+ * dev_attr_file_nonremovable
+ *
+ * so we don't differentiate between removing e.g. dev_attr_ro_cdrom
+ * and dev_attr_ro
+ */
+ device_remove_file(&lun->dev, &dev_attr_ro);
+ device_remove_file(&lun->dev, &dev_attr_file);
+}
+
+void fsg_common_remove_lun(struct fsg_lun *lun, bool sysfs)
+{
+ if (sysfs) {
+ fsg_common_remove_sysfs(lun);
+ device_unregister(&lun->dev);
+ }
+ fsg_lun_close(lun);
+ kfree(lun);
+}
+EXPORT_SYMBOL_GPL(fsg_common_remove_lun);
+
+static void _fsg_common_remove_luns(struct fsg_common *common, int n)
+{
+ int i;
+
+ for (i = 0; i < n; ++i)
+ if (common->luns[i]) {
+ fsg_common_remove_lun(common->luns[i], common->sysfs);
+ common->luns[i] = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(fsg_common_remove_luns);
+
+void fsg_common_remove_luns(struct fsg_common *common)
+{
+ _fsg_common_remove_luns(common, common->nluns);
+}
+
+void fsg_common_free_luns(struct fsg_common *common)
+{
+ fsg_common_remove_luns(common);
+ kfree(common->luns);
+ common->luns = NULL;
+}
+EXPORT_SYMBOL_GPL(fsg_common_free_luns);
+
+int fsg_common_set_nluns(struct fsg_common *common, int nluns)
+{
+ struct fsg_lun **curlun;
+
+ /* Find out how many LUNs there should be */
+ if (nluns < 1 || nluns > FSG_MAX_LUNS) {
+ pr_err("invalid number of LUNs: %u\n", nluns);
+ return -EINVAL;
+ }
+
+ curlun = kcalloc(nluns, sizeof(*curlun), GFP_KERNEL);
+ if (unlikely(!curlun))
+ return -ENOMEM;
+
+ if (common->luns)
+ fsg_common_free_luns(common);
+
+ common->luns = curlun;
+ common->nluns = nluns;
+
+ pr_info("Number of LUNs=%d\n", common->nluns);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsg_common_set_nluns);
+
+void fsg_common_set_ops(struct fsg_common *common,
+ const struct fsg_operations *ops)
+{
+ common->ops = ops;
+}
+EXPORT_SYMBOL_GPL(fsg_common_set_ops);
+
+void fsg_common_free_buffers(struct fsg_common *common)
+{
+ _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
+ common->buffhds = NULL;
+}
+EXPORT_SYMBOL_GPL(fsg_common_free_buffers);
+
+int fsg_common_set_cdev(struct fsg_common *common,
+ struct usb_composite_dev *cdev, bool can_stall)
+{
+ struct usb_string *us;
+
+ common->gadget = cdev->gadget;
+ common->ep0 = cdev->gadget->ep0;
+ common->ep0req = cdev->req;
+ common->cdev = cdev;
+
+ us = usb_gstrings_attach(cdev, fsg_strings_array,
+ ARRAY_SIZE(fsg_strings));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+
+ fsg_intf_desc.iInterface = us[FSG_STRING_INTERFACE].id;
+
+ /*
+ * Some peripheral controllers are known not to be able to
+ * halt bulk endpoints correctly. If one of them is present,
+ * disable stalls.
+ */
+ common->can_stall = can_stall && !(gadget_is_at91(common->gadget));
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsg_common_set_cdev);
+
+static inline int fsg_common_add_sysfs(struct fsg_common *common,
+ struct fsg_lun *lun)
+{
+ int rc;
+
+ rc = device_register(&lun->dev);
+ if (rc) {
+ put_device(&lun->dev);
+ return rc;
+ }
+
+ rc = device_create_file(&lun->dev,
+ lun->cdrom
+ ? &dev_attr_ro_cdrom
+ : &dev_attr_ro);
+ if (rc)
+ goto error;
+ rc = device_create_file(&lun->dev,
+ lun->removable
+ ? &dev_attr_file
+ : &dev_attr_file_nonremovable);
+ if (rc)
+ goto error;
+ rc = device_create_file(&lun->dev, &dev_attr_nofua);
+ if (rc)
+ goto error;
+
+ return 0;
+
+error:
+ /* removing nonexistent files is a no-op */
+ fsg_common_remove_sysfs(lun);
+ device_unregister(&lun->dev);
+ return rc;
+}
+
+int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
+ unsigned int id, const char *name,
+ const char **name_pfx)
+{
+ struct fsg_lun *lun;
+ char *pathbuf, *p;
+ int rc = -ENOMEM;
+
+ if (!common->nluns || !common->luns)
+ return -ENODEV;
+
+ if (common->luns[id])
+ return -EBUSY;
+
+ if (!cfg->filename && !cfg->removable) {
+ pr_err("no file given for LUN%d\n", id);
+ return -EINVAL;
+ }
+
+ lun = kzalloc(sizeof(*lun), GFP_KERNEL);
+ if (!lun)
+ return -ENOMEM;
+
+ lun->name_pfx = name_pfx;
+
+ lun->cdrom = !!cfg->cdrom;
+ lun->ro = cfg->cdrom || cfg->ro;
+ lun->initially_ro = lun->ro;
+ lun->removable = !!cfg->removable;
+
+ if (!common->sysfs) {
+ /* we DON'T own the name!*/
+ lun->name = name;
+ } else {
+ lun->dev.release = fsg_lun_release;
+ lun->dev.parent = &common->gadget->dev;
+ dev_set_drvdata(&lun->dev, &common->filesem);
+ dev_set_name(&lun->dev, "%s", name);
+ lun->name = dev_name(&lun->dev);
+
+ rc = fsg_common_add_sysfs(common, lun);
+ if (rc) {
+ pr_info("failed to register LUN%d: %d\n", id, rc);
+ goto error_sysfs;
+ }
+ }
+
+ common->luns[id] = lun;
+
+ if (cfg->filename) {
+ rc = fsg_lun_open(lun, cfg->filename);
+ if (rc)
+ goto error_lun;
+ }
+
+ pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
+ p = "(no medium)";
+ if (fsg_lun_is_open(lun)) {
+ p = "(error)";
+ if (pathbuf) {
+ p = d_path(&lun->filp->f_path, pathbuf, PATH_MAX);
+ if (IS_ERR(p))
+ p = "(error)";
+ }
+ }
+ pr_info("LUN: %s%s%sfile: %s\n",
+ lun->removable ? "removable " : "",
+ lun->ro ? "read only " : "",
+ lun->cdrom ? "CD-ROM " : "",
+ p);
+ kfree(pathbuf);
+
+ return 0;
+
+error_lun:
+ if (common->sysfs) {
+ fsg_common_remove_sysfs(lun);
+ device_unregister(&lun->dev);
+ }
+ fsg_lun_close(lun);
+ common->luns[id] = NULL;
+error_sysfs:
+ kfree(lun);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fsg_common_create_lun);
+
+int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg)
+{
+ char buf[8]; /* enough for 100000000 different numbers, decimal */
+ int i, rc;
+
+ for (i = 0; i < common->nluns; ++i) {
+ snprintf(buf, sizeof(buf), "lun%d", i);
+ rc = fsg_common_create_lun(common, &cfg->luns[i], i, buf, NULL);
+ if (rc)
+ goto fail;
+ }
+
+ pr_info("Number of LUNs=%d\n", common->nluns);
+
+ return 0;
+
+fail:
+ _fsg_common_remove_luns(common, i);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fsg_common_create_luns);
+
+void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
+ const char *pn)
+{
+ int i;
+
+ /* Prepare inquiryString */
+ i = get_default_bcdDevice();
+ snprintf(common->inquiry_string, sizeof(common->inquiry_string),
+ "%-8s%-16s%04x", vn ?: "Linux",
+ /* Assume product name dependent on the first LUN */
+ pn ?: ((*common->luns)->cdrom
+ ? "File-CD Gadget"
+ : "File-Stor Gadget"),
+ i);
+}
+EXPORT_SYMBOL_GPL(fsg_common_set_inquiry_string);
+
+int fsg_common_run_thread(struct fsg_common *common)
+{
+ common->state = FSG_STATE_IDLE;
+ /* Tell the thread to start working */
+ common->thread_task =
+ kthread_create(fsg_main_thread, common, "file-storage");
+ if (IS_ERR(common->thread_task)) {
+ common->state = FSG_STATE_TERMINATED;
+ return PTR_ERR(common->thread_task);
+ }
+
+ DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task));
+
+ wake_up_process(common->thread_task);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsg_common_run_thread);
+
+static void fsg_common_release(struct kref *ref)
+{
+ struct fsg_common *common = container_of(ref, struct fsg_common, ref);
+
+ /* If the thread isn't already dead, tell it to exit now */
+ if (common->state != FSG_STATE_TERMINATED) {
+ raise_exception(common, FSG_STATE_EXIT);
+ wait_for_completion(&common->thread_notifier);
+ }
+
+ if (likely(common->luns)) {
+ struct fsg_lun **lun_it = common->luns;
+ unsigned i = common->nluns;
+
+ /* In error recovery common->nluns may be zero. */
+ for (; i; --i, ++lun_it) {
+ struct fsg_lun *lun = *lun_it;
+ if (!lun)
+ continue;
+ if (common->sysfs)
+ fsg_common_remove_sysfs(lun);
+ fsg_lun_close(lun);
+ if (common->sysfs)
+ device_unregister(&lun->dev);
+ kfree(lun);
+ }
+
+ kfree(common->luns);
+ }
+
+ _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
+ if (common->free_storage_on_release)
+ kfree(common);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct fsg_dev *fsg = fsg_from_func(f);
+ struct usb_gadget *gadget = c->cdev->gadget;
+ int i;
+ struct usb_ep *ep;
+ unsigned max_burst;
+ int ret;
+ struct fsg_opts *opts;
+
+ opts = fsg_opts_from_func_inst(f->fi);
+ if (!opts->no_configfs) {
+ ret = fsg_common_set_cdev(fsg->common, c->cdev,
+ fsg->common->can_stall);
+ if (ret)
+ return ret;
+ fsg_common_set_inquiry_string(fsg->common, NULL, NULL);
+ ret = fsg_common_run_thread(fsg->common);
+ if (ret)
+ return ret;
+ }
+
+ fsg->gadget = gadget;
+
+ /* New interface */
+ i = usb_interface_id(c, f);
+ if (i < 0)
+ return i;
+ fsg_intf_desc.bInterfaceNumber = i;
+ fsg->interface_number = i;
+
+ /* Find all the endpoints we will use */
+ ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
+ if (!ep)
+ goto autoconf_fail;
+ ep->driver_data = fsg->common; /* claim the endpoint */
+ fsg->bulk_in = ep;
+
+ ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
+ if (!ep)
+ goto autoconf_fail;
+ ep->driver_data = fsg->common; /* claim the endpoint */
+ fsg->bulk_out = ep;
+
+ /* Assume endpoint addresses are the same for both speeds */
+ fsg_hs_bulk_in_desc.bEndpointAddress =
+ fsg_fs_bulk_in_desc.bEndpointAddress;
+ fsg_hs_bulk_out_desc.bEndpointAddress =
+ fsg_fs_bulk_out_desc.bEndpointAddress;
+
+ /* Calculate bMaxBurst, we know packet size is 1024 */
+ max_burst = min_t(unsigned, FSG_BUFLEN / 1024, 15);
+
+ fsg_ss_bulk_in_desc.bEndpointAddress =
+ fsg_fs_bulk_in_desc.bEndpointAddress;
+ fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst;
+
+ fsg_ss_bulk_out_desc.bEndpointAddress =
+ fsg_fs_bulk_out_desc.bEndpointAddress;
+ fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst;
+
+ ret = usb_assign_descriptors(f, fsg_fs_function, fsg_hs_function,
+ fsg_ss_function);
+ if (ret)
+ goto autoconf_fail;
+
+ return 0;
+
+autoconf_fail:
+ ERROR(fsg, "unable to autoconfigure all endpoints\n");
+ return -ENOTSUPP;
+}
+
+/****************************** ALLOCATE FUNCTION *************************/
+
+static void fsg_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct fsg_dev *fsg = fsg_from_func(f);
+ struct fsg_common *common = fsg->common;
+
+ DBG(fsg, "unbind\n");
+ if (fsg->common->fsg == fsg) {
+ fsg->common->new_fsg = NULL;
+ raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
+ /* FIXME: make interruptible or killable somehow? */
+ wait_event(common->fsg_wait, common->fsg != fsg);
+ }
+
+ usb_free_all_descriptors(&fsg->function);
+}
+
+static inline struct fsg_lun_opts *to_fsg_lun_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct fsg_lun_opts, group);
+}
+
+static inline struct fsg_opts *to_fsg_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct fsg_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(fsg_lun_opts);
+CONFIGFS_ATTR_OPS(fsg_lun_opts);
+
+static void fsg_lun_attr_release(struct config_item *item)
+{
+ struct fsg_lun_opts *lun_opts;
+
+ lun_opts = to_fsg_lun_opts(item);
+ kfree(lun_opts);
+}
+
+static struct configfs_item_operations fsg_lun_item_ops = {
+ .release = fsg_lun_attr_release,
+ .show_attribute = fsg_lun_opts_attr_show,
+ .store_attribute = fsg_lun_opts_attr_store,
+};
+
+static ssize_t fsg_lun_opts_file_show(struct fsg_lun_opts *opts, char *page)
+{
+ struct fsg_opts *fsg_opts;
+
+ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
+
+ return fsg_show_file(opts->lun, &fsg_opts->common->filesem, page);
+}
+
+static ssize_t fsg_lun_opts_file_store(struct fsg_lun_opts *opts,
+ const char *page, size_t len)
+{
+ struct fsg_opts *fsg_opts;
+
+ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
+
+ return fsg_store_file(opts->lun, &fsg_opts->common->filesem, page, len);
+}
+
+static struct fsg_lun_opts_attribute fsg_lun_opts_file =
+ __CONFIGFS_ATTR(file, S_IRUGO | S_IWUSR, fsg_lun_opts_file_show,
+ fsg_lun_opts_file_store);
+
+static ssize_t fsg_lun_opts_ro_show(struct fsg_lun_opts *opts, char *page)
+{
+ return fsg_show_ro(opts->lun, page);
+}
+
+static ssize_t fsg_lun_opts_ro_store(struct fsg_lun_opts *opts,
+ const char *page, size_t len)
+{
+ struct fsg_opts *fsg_opts;
+
+ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
+
+ return fsg_store_ro(opts->lun, &fsg_opts->common->filesem, page, len);
+}
+
+static struct fsg_lun_opts_attribute fsg_lun_opts_ro =
+ __CONFIGFS_ATTR(ro, S_IRUGO | S_IWUSR, fsg_lun_opts_ro_show,
+ fsg_lun_opts_ro_store);
+
+static ssize_t fsg_lun_opts_removable_show(struct fsg_lun_opts *opts,
+ char *page)
+{
+ return fsg_show_removable(opts->lun, page);
+}
+
+static ssize_t fsg_lun_opts_removable_store(struct fsg_lun_opts *opts,
+ const char *page, size_t len)
+{
+ return fsg_store_removable(opts->lun, page, len);
+}
+
+static struct fsg_lun_opts_attribute fsg_lun_opts_removable =
+ __CONFIGFS_ATTR(removable, S_IRUGO | S_IWUSR,
+ fsg_lun_opts_removable_show,
+ fsg_lun_opts_removable_store);
+
+static ssize_t fsg_lun_opts_cdrom_show(struct fsg_lun_opts *opts, char *page)
+{
+ return fsg_show_cdrom(opts->lun, page);
+}
+
+static ssize_t fsg_lun_opts_cdrom_store(struct fsg_lun_opts *opts,
+ const char *page, size_t len)
+{
+ struct fsg_opts *fsg_opts;
+
+ fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent);
+
+ return fsg_store_cdrom(opts->lun, &fsg_opts->common->filesem, page,
+ len);
+}
+
+static struct fsg_lun_opts_attribute fsg_lun_opts_cdrom =
+ __CONFIGFS_ATTR(cdrom, S_IRUGO | S_IWUSR, fsg_lun_opts_cdrom_show,
+ fsg_lun_opts_cdrom_store);
+
+static ssize_t fsg_lun_opts_nofua_show(struct fsg_lun_opts *opts, char *page)
+{
+ return fsg_show_nofua(opts->lun, page);
+}
+
+static ssize_t fsg_lun_opts_nofua_store(struct fsg_lun_opts *opts,
+ const char *page, size_t len)
+{
+ return fsg_store_nofua(opts->lun, page, len);
+}
+
+static struct fsg_lun_opts_attribute fsg_lun_opts_nofua =
+ __CONFIGFS_ATTR(nofua, S_IRUGO | S_IWUSR, fsg_lun_opts_nofua_show,
+ fsg_lun_opts_nofua_store);
+
+static struct configfs_attribute *fsg_lun_attrs[] = {
+ &fsg_lun_opts_file.attr,
+ &fsg_lun_opts_ro.attr,
+ &fsg_lun_opts_removable.attr,
+ &fsg_lun_opts_cdrom.attr,
+ &fsg_lun_opts_nofua.attr,
+ NULL,
+};
+
+static struct config_item_type fsg_lun_type = {
+ .ct_item_ops = &fsg_lun_item_ops,
+ .ct_attrs = fsg_lun_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group *fsg_lun_make(struct config_group *group,
+ const char *name)
+{
+ struct fsg_lun_opts *opts;
+ struct fsg_opts *fsg_opts;
+ struct fsg_lun_config config;
+ char *num_str;
+ u8 num;
+ int ret;
+
+ num_str = strchr(name, '.');
+ if (!num_str) {
+ pr_err("Unable to locate . in LUN.NUMBER\n");
+ return ERR_PTR(-EINVAL);
+ }
+ num_str++;
+
+ ret = kstrtou8(num_str, 0, &num);
+ if (ret)
+ return ERR_PTR(ret);
+
+ fsg_opts = to_fsg_opts(&group->cg_item);
+ if (num >= FSG_MAX_LUNS)
+ return ERR_PTR(-ERANGE);
+
+ mutex_lock(&fsg_opts->lock);
+ if (fsg_opts->refcnt || fsg_opts->common->luns[num]) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ memset(&config, 0, sizeof(config));
+ config.removable = true;
+
+ ret = fsg_common_create_lun(fsg_opts->common, &config, num, name,
+ (const char **)&group->cg_item.ci_name);
+ if (ret) {
+ kfree(opts);
+ goto out;
+ }
+ opts->lun = fsg_opts->common->luns[num];
+ opts->lun_id = num;
+ mutex_unlock(&fsg_opts->lock);
+
+ config_group_init_type_name(&opts->group, name, &fsg_lun_type);
+
+ return &opts->group;
+out:
+ mutex_unlock(&fsg_opts->lock);
+ return ERR_PTR(ret);
+}
+
+static void fsg_lun_drop(struct config_group *group, struct config_item *item)
+{
+ struct fsg_lun_opts *lun_opts;
+ struct fsg_opts *fsg_opts;
+
+ lun_opts = to_fsg_lun_opts(item);
+ fsg_opts = to_fsg_opts(&group->cg_item);
+
+ mutex_lock(&fsg_opts->lock);
+ if (fsg_opts->refcnt) {
+ struct config_item *gadget;
+
+ gadget = group->cg_item.ci_parent->ci_parent;
+ unregister_gadget_item(gadget);
+ }
+
+ fsg_common_remove_lun(lun_opts->lun, fsg_opts->common->sysfs);
+ fsg_opts->common->luns[lun_opts->lun_id] = NULL;
+ lun_opts->lun_id = 0;
+ mutex_unlock(&fsg_opts->lock);
+
+ config_item_put(item);
+}
+
+CONFIGFS_ATTR_STRUCT(fsg_opts);
+CONFIGFS_ATTR_OPS(fsg_opts);
+
+static void fsg_attr_release(struct config_item *item)
+{
+ struct fsg_opts *opts = to_fsg_opts(item);
+
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations fsg_item_ops = {
+ .release = fsg_attr_release,
+ .show_attribute = fsg_opts_attr_show,
+ .store_attribute = fsg_opts_attr_store,
+};
+
+static ssize_t fsg_opts_stall_show(struct fsg_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->common->can_stall);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t fsg_opts_stall_store(struct fsg_opts *opts, const char *page,
+ size_t len)
+{
+ int ret;
+ bool stall;
+
+ mutex_lock(&opts->lock);
+
+ if (opts->refcnt) {
+ mutex_unlock(&opts->lock);
+ return -EBUSY;
+ }
+
+ ret = strtobool(page, &stall);
+ if (!ret) {
+ opts->common->can_stall = stall;
+ ret = len;
+ }
+
+ mutex_unlock(&opts->lock);
+
+ return ret;
+}
+
+static struct fsg_opts_attribute fsg_opts_stall =
+ __CONFIGFS_ATTR(stall, S_IRUGO | S_IWUSR, fsg_opts_stall_show,
+ fsg_opts_stall_store);
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+static ssize_t fsg_opts_num_buffers_show(struct fsg_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->common->fsg_num_buffers);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t fsg_opts_num_buffers_store(struct fsg_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u8 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+ ret = kstrtou8(page, 0, &num);
+ if (ret)
+ goto end;
+
+ ret = fsg_num_buffers_validate(num);
+ if (ret)
+ goto end;
+
+ fsg_common_set_num_buffers(opts->common, num);
+ ret = len;
+
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct fsg_opts_attribute fsg_opts_num_buffers =
+ __CONFIGFS_ATTR(num_buffers, S_IRUGO | S_IWUSR,
+ fsg_opts_num_buffers_show,
+ fsg_opts_num_buffers_store);
+
+#endif
+
+static struct configfs_attribute *fsg_attrs[] = {
+ &fsg_opts_stall.attr,
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+ &fsg_opts_num_buffers.attr,
+#endif
+ NULL,
+};
+
+static struct configfs_group_operations fsg_group_ops = {
+ .make_group = fsg_lun_make,
+ .drop_item = fsg_lun_drop,
+};
+
+static struct config_item_type fsg_func_type = {
+ .ct_item_ops = &fsg_item_ops,
+ .ct_group_ops = &fsg_group_ops,
+ .ct_attrs = fsg_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void fsg_free_inst(struct usb_function_instance *fi)
+{
+ struct fsg_opts *opts;
+
+ opts = fsg_opts_from_func_inst(fi);
+ fsg_common_put(opts->common);
+ kfree(opts);
+}
+
+static struct usb_function_instance *fsg_alloc_inst(void)
+{
+ struct fsg_opts *opts;
+ struct fsg_lun_config config;
+ int rc;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&opts->lock);
+ opts->func_inst.free_func_inst = fsg_free_inst;
+ opts->common = fsg_common_setup(opts->common);
+ if (IS_ERR(opts->common)) {
+ rc = PTR_ERR(opts->common);
+ goto release_opts;
+ }
+ rc = fsg_common_set_nluns(opts->common, FSG_MAX_LUNS);
+ if (rc)
+ goto release_opts;
+
+ rc = fsg_common_set_num_buffers(opts->common,
+ CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS);
+ if (rc)
+ goto release_luns;
+
+ pr_info(FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n");
+
+ memset(&config, 0, sizeof(config));
+ config.removable = true;
+ rc = fsg_common_create_lun(opts->common, &config, 0, "lun.0",
+ (const char **)&opts->func_inst.group.cg_item.ci_name);
+ opts->lun0.lun = opts->common->luns[0];
+ opts->lun0.lun_id = 0;
+ config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type);
+ opts->default_groups[0] = &opts->lun0.group;
+ opts->func_inst.group.default_groups = opts->default_groups;
+
+ config_group_init_type_name(&opts->func_inst.group, "", &fsg_func_type);
+
+ return &opts->func_inst;
+
+release_luns:
+ kfree(opts->common->luns);
+release_opts:
+ kfree(opts);
+ return ERR_PTR(rc);
+}
+
+static void fsg_free(struct usb_function *f)
+{
+ struct fsg_dev *fsg;
+ struct fsg_opts *opts;
+
+ fsg = container_of(f, struct fsg_dev, function);
+ opts = container_of(f->fi, struct fsg_opts, func_inst);
+
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+
+ kfree(fsg);
+}
+
+static struct usb_function *fsg_alloc(struct usb_function_instance *fi)
+{
+ struct fsg_opts *opts = fsg_opts_from_func_inst(fi);
+ struct fsg_common *common = opts->common;
+ struct fsg_dev *fsg;
+
+ fsg = kzalloc(sizeof(*fsg), GFP_KERNEL);
+ if (unlikely(!fsg))
+ return ERR_PTR(-ENOMEM);
+
+ mutex_lock(&opts->lock);
+ opts->refcnt++;
+ mutex_unlock(&opts->lock);
+ fsg->function.name = FSG_DRIVER_DESC;
+ fsg->function.bind = fsg_bind;
+ fsg->function.unbind = fsg_unbind;
+ fsg->function.setup = fsg_setup;
+ fsg->function.set_alt = fsg_set_alt;
+ fsg->function.disable = fsg_disable;
+ fsg->function.free_func = fsg_free;
+
+ fsg->common = common;
+
+ return &fsg->function;
+}
+
+DECLARE_USB_FUNCTION_INIT(mass_storage, fsg_alloc_inst, fsg_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Nazarewicz");
+
+/************************* Module parameters *************************/
+
+
+void fsg_config_from_params(struct fsg_config *cfg,
+ const struct fsg_module_parameters *params,
+ unsigned int fsg_num_buffers)
+{
+ struct fsg_lun_config *lun;
+ unsigned i;
+
+ /* Configure LUNs */
+ cfg->nluns =
+ min(params->luns ?: (params->file_count ?: 1u),
+ (unsigned)FSG_MAX_LUNS);
+ for (i = 0, lun = cfg->luns; i < cfg->nluns; ++i, ++lun) {
+ lun->ro = !!params->ro[i];
+ lun->cdrom = !!params->cdrom[i];
+ lun->removable = !!params->removable[i];
+ lun->filename =
+ params->file_count > i && params->file[i][0]
+ ? params->file[i]
+ : NULL;
+ }
+
+ /* Let MSF use defaults */
+ cfg->vendor_name = NULL;
+ cfg->product_name = NULL;
+
+ cfg->ops = NULL;
+ cfg->private_data = NULL;
+
+ /* Finalise */
+ cfg->can_stall = params->stall;
+ cfg->fsg_num_buffers = fsg_num_buffers;
+}
+EXPORT_SYMBOL_GPL(fsg_config_from_params);
+
--- /dev/null
+#ifndef USB_F_MASS_STORAGE_H
+#define USB_F_MASS_STORAGE_H
+
+#include <linux/usb/composite.h>
+#include "storage_common.h"
+
+struct fsg_module_parameters {
+ char *file[FSG_MAX_LUNS];
+ bool ro[FSG_MAX_LUNS];
+ bool removable[FSG_MAX_LUNS];
+ bool cdrom[FSG_MAX_LUNS];
+ bool nofua[FSG_MAX_LUNS];
+
+ unsigned int file_count, ro_count, removable_count, cdrom_count;
+ unsigned int nofua_count;
+ unsigned int luns; /* nluns */
+ bool stall; /* can_stall */
+};
+
+#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc) \
+ module_param_array_named(prefix ## name, params.name, type, \
+ &prefix ## params.name ## _count, \
+ S_IRUGO); \
+ MODULE_PARM_DESC(prefix ## name, desc)
+
+#define _FSG_MODULE_PARAM(prefix, params, name, type, desc) \
+ module_param_named(prefix ## name, params.name, type, \
+ S_IRUGO); \
+ MODULE_PARM_DESC(prefix ## name, desc)
+
+#define __FSG_MODULE_PARAMETERS(prefix, params) \
+ _FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp, \
+ "names of backing files or devices"); \
+ _FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool, \
+ "true to force read-only"); \
+ _FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool, \
+ "true to simulate removable media"); \
+ _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \
+ "true to simulate CD-ROM instead of disk"); \
+ _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \
+ "true to ignore SCSI WRITE(10,12) FUA bit"); \
+ _FSG_MODULE_PARAM(prefix, params, luns, uint, \
+ "number of LUNs"); \
+ _FSG_MODULE_PARAM(prefix, params, stall, bool, \
+ "false to prevent bulk stalls")
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+#define FSG_MODULE_PARAMETERS(prefix, params) \
+ __FSG_MODULE_PARAMETERS(prefix, params); \
+ module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
+ MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
+#else
+
+#define FSG_MODULE_PARAMETERS(prefix, params) \
+ __FSG_MODULE_PARAMETERS(prefix, params)
+
+#endif
+
+struct fsg_common;
+
+/* FSF callback functions */
+struct fsg_operations {
+ /*
+ * Callback function to call when thread exits. If no
+ * callback is set or it returns value lower then zero MSF
+ * will force eject all LUNs it operates on (including those
+ * marked as non-removable or with prevent_medium_removal flag
+ * set).
+ */
+ int (*thread_exits)(struct fsg_common *common);
+};
+
+struct fsg_lun_opts {
+ struct config_group group;
+ struct fsg_lun *lun;
+ int lun_id;
+};
+
+struct fsg_opts {
+ struct fsg_common *common;
+ struct usb_function_instance func_inst;
+ struct fsg_lun_opts lun0;
+ struct config_group *default_groups[2];
+ bool no_configfs; /* for legacy gadgets */
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+struct fsg_lun_config {
+ const char *filename;
+ char ro;
+ char removable;
+ char cdrom;
+ char nofua;
+};
+
+struct fsg_config {
+ unsigned nluns;
+ struct fsg_lun_config luns[FSG_MAX_LUNS];
+
+ /* Callback functions. */
+ const struct fsg_operations *ops;
+ /* Gadget's private data. */
+ void *private_data;
+
+ const char *vendor_name; /* 8 characters or less */
+ const char *product_name; /* 16 characters or less */
+
+ char can_stall;
+ unsigned int fsg_num_buffers;
+};
+
+static inline struct fsg_opts *
+fsg_opts_from_func_inst(const struct usb_function_instance *fi)
+{
+ return container_of(fi, struct fsg_opts, func_inst);
+}
+
+void fsg_common_get(struct fsg_common *common);
+
+void fsg_common_put(struct fsg_common *common);
+
+void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs);
+
+int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n);
+
+void fsg_common_free_buffers(struct fsg_common *common);
+
+int fsg_common_set_cdev(struct fsg_common *common,
+ struct usb_composite_dev *cdev, bool can_stall);
+
+void fsg_common_remove_lun(struct fsg_lun *lun, bool sysfs);
+
+void fsg_common_remove_luns(struct fsg_common *common);
+
+void fsg_common_free_luns(struct fsg_common *common);
+
+int fsg_common_set_nluns(struct fsg_common *common, int nluns);
+
+void fsg_common_set_ops(struct fsg_common *common,
+ const struct fsg_operations *ops);
+
+int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
+ unsigned int id, const char *name,
+ const char **name_pfx);
+
+int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg);
+
+void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
+ const char *pn);
+
+int fsg_common_run_thread(struct fsg_common *common);
+
+void fsg_config_from_params(struct fsg_config *cfg,
+ const struct fsg_module_parameters *params,
+ unsigned int fsg_num_buffers);
+
+#endif /* USB_F_MASS_STORAGE_H */
--- /dev/null
+/*
+ * f_midi.c -- USB MIDI class function driver
+ *
+ * Copyright (C) 2006 Thumtronics Pty Ltd.
+ * Developed for Thumtronics by Grey Innovation
+ * Ben Williamson <ben.williamson@greyinnovation.com>
+ *
+ * Rewritten for the composite framework
+ * Copyright (C) 2011 Daniel Mack <zonque@gmail.com>
+ *
+ * Based on drivers/usb/gadget/f_audio.c,
+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
+ * Copyright (C) 2008 Analog Devices, Inc
+ *
+ * and drivers/usb/gadget/midi.c,
+ * Copyright (C) 2006 Thumtronics Pty Ltd.
+ * Ben Williamson <ben.williamson@greyinnovation.com>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/rawmidi.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/midi.h>
+
+#include "u_f.h"
+
+MODULE_AUTHOR("Ben Williamson");
+MODULE_LICENSE("GPL v2");
+
+static const char f_midi_shortname[] = "f_midi";
+static const char f_midi_longname[] = "MIDI Gadget";
+
+/*
+ * We can only handle 16 cables on one single endpoint, as cable numbers are
+ * stored in 4-bit fields. And as the interface currently only holds one
+ * single endpoint, this is the maximum number of ports we can allow.
+ */
+#define MAX_PORTS 16
+
+/*
+ * This is a gadget, and the IN/OUT naming is from the host's perspective.
+ * USB -> OUT endpoint -> rawmidi
+ * USB <- IN endpoint <- rawmidi
+ */
+struct gmidi_in_port {
+ struct f_midi *midi;
+ int active;
+ uint8_t cable;
+ uint8_t state;
+#define STATE_UNKNOWN 0
+#define STATE_1PARAM 1
+#define STATE_2PARAM_1 2
+#define STATE_2PARAM_2 3
+#define STATE_SYSEX_0 4
+#define STATE_SYSEX_1 5
+#define STATE_SYSEX_2 6
+ uint8_t data[2];
+};
+
+struct f_midi {
+ struct usb_function func;
+ struct usb_gadget *gadget;
+ struct usb_ep *in_ep, *out_ep;
+ struct snd_card *card;
+ struct snd_rawmidi *rmidi;
+
+ struct snd_rawmidi_substream *in_substream[MAX_PORTS];
+ struct snd_rawmidi_substream *out_substream[MAX_PORTS];
+ struct gmidi_in_port *in_port[MAX_PORTS];
+
+ unsigned long out_triggered;
+ struct tasklet_struct tasklet;
+ unsigned int in_ports;
+ unsigned int out_ports;
+ int index;
+ char *id;
+ unsigned int buflen, qlen;
+};
+
+static inline struct f_midi *func_to_midi(struct usb_function *f)
+{
+ return container_of(f, struct f_midi, func);
+}
+
+static void f_midi_transmit(struct f_midi *midi, struct usb_request *req);
+
+DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
+DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1);
+DECLARE_USB_MS_ENDPOINT_DESCRIPTOR(16);
+
+/* B.3.1 Standard AC Interface Descriptor */
+static struct usb_interface_descriptor ac_interface_desc __initdata = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ /* .bInterfaceNumber = DYNAMIC */
+ /* .bNumEndpoints = DYNAMIC */
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
+ /* .iInterface = DYNAMIC */
+};
+
+/* B.3.2 Class-Specific AC Interface Descriptor */
+static struct uac1_ac_header_descriptor_1 ac_header_desc __initdata = {
+ .bLength = UAC_DT_AC_HEADER_SIZE(1),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = USB_MS_HEADER,
+ .bcdADC = cpu_to_le16(0x0100),
+ .wTotalLength = cpu_to_le16(UAC_DT_AC_HEADER_SIZE(1)),
+ .bInCollection = 1,
+ /* .baInterfaceNr = DYNAMIC */
+};
+
+/* B.4.1 Standard MS Interface Descriptor */
+static struct usb_interface_descriptor ms_interface_desc __initdata = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_MIDISTREAMING,
+ /* .iInterface = DYNAMIC */
+};
+
+/* B.4.2 Class-Specific MS Interface Descriptor */
+static struct usb_ms_header_descriptor ms_header_desc __initdata = {
+ .bLength = USB_DT_MS_HEADER_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = USB_MS_HEADER,
+ .bcdMSC = cpu_to_le16(0x0100),
+ /* .wTotalLength = DYNAMIC */
+};
+
+/* B.5.1 Standard Bulk OUT Endpoint Descriptor */
+static struct usb_endpoint_descriptor bulk_out_desc = {
+ .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+/* B.5.2 Class-specific MS Bulk OUT Endpoint Descriptor */
+static struct usb_ms_endpoint_descriptor_16 ms_out_desc = {
+ /* .bLength = DYNAMIC */
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+ .bDescriptorSubtype = USB_MS_GENERAL,
+ /* .bNumEmbMIDIJack = DYNAMIC */
+ /* .baAssocJackID = DYNAMIC */
+};
+
+/* B.6.1 Standard Bulk IN Endpoint Descriptor */
+static struct usb_endpoint_descriptor bulk_in_desc = {
+ .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+/* B.6.2 Class-specific MS Bulk IN Endpoint Descriptor */
+static struct usb_ms_endpoint_descriptor_16 ms_in_desc = {
+ /* .bLength = DYNAMIC */
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+ .bDescriptorSubtype = USB_MS_GENERAL,
+ /* .bNumEmbMIDIJack = DYNAMIC */
+ /* .baAssocJackID = DYNAMIC */
+};
+
+/* string IDs are assigned dynamically */
+
+#define STRING_FUNC_IDX 0
+
+static struct usb_string midi_string_defs[] = {
+ [STRING_FUNC_IDX].s = "MIDI function",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings midi_stringtab = {
+ .language = 0x0409, /* en-us */
+ .strings = midi_string_defs,
+};
+
+static struct usb_gadget_strings *midi_strings[] = {
+ &midi_stringtab,
+ NULL,
+};
+
+static inline struct usb_request *midi_alloc_ep_req(struct usb_ep *ep,
+ unsigned length)
+{
+ return alloc_ep_req(ep, length, length);
+}
+
+static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
+{
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+static const uint8_t f_midi_cin_length[] = {
+ 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
+};
+
+/*
+ * Receives a chunk of MIDI data.
+ */
+static void f_midi_read_data(struct usb_ep *ep, int cable,
+ uint8_t *data, int length)
+{
+ struct f_midi *midi = ep->driver_data;
+ struct snd_rawmidi_substream *substream = midi->out_substream[cable];
+
+ if (!substream)
+ /* Nobody is listening - throw it on the floor. */
+ return;
+
+ if (!test_bit(cable, &midi->out_triggered))
+ return;
+
+ snd_rawmidi_receive(substream, data, length);
+}
+
+static void f_midi_handle_out_data(struct usb_ep *ep, struct usb_request *req)
+{
+ unsigned int i;
+ u8 *buf = req->buf;
+
+ for (i = 0; i + 3 < req->actual; i += 4)
+ if (buf[i] != 0) {
+ int cable = buf[i] >> 4;
+ int length = f_midi_cin_length[buf[i] & 0x0f];
+ f_midi_read_data(ep, cable, &buf[i + 1], length);
+ }
+}
+
+static void
+f_midi_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_midi *midi = ep->driver_data;
+ struct usb_composite_dev *cdev = midi->func.config->cdev;
+ int status = req->status;
+
+ switch (status) {
+ case 0: /* normal completion */
+ if (ep == midi->out_ep) {
+ /* We received stuff. req is queued again, below */
+ f_midi_handle_out_data(ep, req);
+ } else if (ep == midi->in_ep) {
+ /* Our transmit completed. See if there's more to go.
+ * f_midi_transmit eats req, don't queue it again. */
+ f_midi_transmit(midi, req);
+ return;
+ }
+ break;
+
+ /* this endpoint is normally active while we're configured */
+ case -ECONNABORTED: /* hardware forced ep reset */
+ case -ECONNRESET: /* request dequeued */
+ case -ESHUTDOWN: /* disconnect from host */
+ VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
+ req->actual, req->length);
+ if (ep == midi->out_ep)
+ f_midi_handle_out_data(ep, req);
+
+ free_ep_req(ep, req);
+ return;
+
+ case -EOVERFLOW: /* buffer overrun on read means that
+ * we didn't provide a big enough buffer.
+ */
+ default:
+ DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
+ status, req->actual, req->length);
+ break;
+ case -EREMOTEIO: /* short read */
+ break;
+ }
+
+ status = usb_ep_queue(ep, req, GFP_ATOMIC);
+ if (status) {
+ ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
+ ep->name, req->length, status);
+ usb_ep_set_halt(ep);
+ /* FIXME recover later ... somehow */
+ }
+}
+
+static int f_midi_start_ep(struct f_midi *midi,
+ struct usb_function *f,
+ struct usb_ep *ep)
+{
+ int err;
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ if (ep->driver_data)
+ usb_ep_disable(ep);
+
+ err = config_ep_by_speed(midi->gadget, f, ep);
+ if (err) {
+ ERROR(cdev, "can't configure %s: %d\n", ep->name, err);
+ return err;
+ }
+
+ err = usb_ep_enable(ep);
+ if (err) {
+ ERROR(cdev, "can't start %s: %d\n", ep->name, err);
+ return err;
+ }
+
+ ep->driver_data = midi;
+
+ return 0;
+}
+
+static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_midi *midi = func_to_midi(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ unsigned i;
+ int err;
+
+ err = f_midi_start_ep(midi, f, midi->in_ep);
+ if (err)
+ return err;
+
+ err = f_midi_start_ep(midi, f, midi->out_ep);
+ if (err)
+ return err;
+
+ if (midi->out_ep->driver_data)
+ usb_ep_disable(midi->out_ep);
+
+ err = config_ep_by_speed(midi->gadget, f, midi->out_ep);
+ if (err) {
+ ERROR(cdev, "can't configure %s: %d\n",
+ midi->out_ep->name, err);
+ return err;
+ }
+
+ err = usb_ep_enable(midi->out_ep);
+ if (err) {
+ ERROR(cdev, "can't start %s: %d\n",
+ midi->out_ep->name, err);
+ return err;
+ }
+
+ midi->out_ep->driver_data = midi;
+
+ /* allocate a bunch of read buffers and queue them all at once. */
+ for (i = 0; i < midi->qlen && err == 0; i++) {
+ struct usb_request *req =
+ midi_alloc_ep_req(midi->out_ep, midi->buflen);
+ if (req == NULL)
+ return -ENOMEM;
+
+ req->complete = f_midi_complete;
+ err = usb_ep_queue(midi->out_ep, req, GFP_ATOMIC);
+ if (err) {
+ ERROR(midi, "%s queue req: %d\n",
+ midi->out_ep->name, err);
+ }
+ }
+
+ return 0;
+}
+
+static void f_midi_disable(struct usb_function *f)
+{
+ struct f_midi *midi = func_to_midi(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "disable\n");
+
+ /*
+ * just disable endpoints, forcing completion of pending i/o.
+ * all our completion handlers free their requests in this case.
+ */
+ usb_ep_disable(midi->in_ep);
+ usb_ep_disable(midi->out_ep);
+}
+
+static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct f_midi *midi = func_to_midi(f);
+ struct snd_card *card;
+
+ DBG(cdev, "unbind\n");
+
+ /* just to be sure */
+ f_midi_disable(f);
+
+ card = midi->card;
+ midi->card = NULL;
+ if (card)
+ snd_card_free(card);
+
+ kfree(midi->id);
+ midi->id = NULL;
+
+ usb_free_all_descriptors(f);
+ kfree(midi);
+}
+
+static int f_midi_snd_free(struct snd_device *device)
+{
+ return 0;
+}
+
+static void f_midi_transmit_packet(struct usb_request *req, uint8_t p0,
+ uint8_t p1, uint8_t p2, uint8_t p3)
+{
+ unsigned length = req->length;
+ u8 *buf = (u8 *)req->buf + length;
+
+ buf[0] = p0;
+ buf[1] = p1;
+ buf[2] = p2;
+ buf[3] = p3;
+ req->length = length + 4;
+}
+
+/*
+ * Converts MIDI commands to USB MIDI packets.
+ */
+static void f_midi_transmit_byte(struct usb_request *req,
+ struct gmidi_in_port *port, uint8_t b)
+{
+ uint8_t p0 = port->cable << 4;
+
+ if (b >= 0xf8) {
+ f_midi_transmit_packet(req, p0 | 0x0f, b, 0, 0);
+ } else if (b >= 0xf0) {
+ switch (b) {
+ case 0xf0:
+ port->data[0] = b;
+ port->state = STATE_SYSEX_1;
+ break;
+ case 0xf1:
+ case 0xf3:
+ port->data[0] = b;
+ port->state = STATE_1PARAM;
+ break;
+ case 0xf2:
+ port->data[0] = b;
+ port->state = STATE_2PARAM_1;
+ break;
+ case 0xf4:
+ case 0xf5:
+ port->state = STATE_UNKNOWN;
+ break;
+ case 0xf6:
+ f_midi_transmit_packet(req, p0 | 0x05, 0xf6, 0, 0);
+ port->state = STATE_UNKNOWN;
+ break;
+ case 0xf7:
+ switch (port->state) {
+ case STATE_SYSEX_0:
+ f_midi_transmit_packet(req,
+ p0 | 0x05, 0xf7, 0, 0);
+ break;
+ case STATE_SYSEX_1:
+ f_midi_transmit_packet(req,
+ p0 | 0x06, port->data[0], 0xf7, 0);
+ break;
+ case STATE_SYSEX_2:
+ f_midi_transmit_packet(req,
+ p0 | 0x07, port->data[0],
+ port->data[1], 0xf7);
+ break;
+ }
+ port->state = STATE_UNKNOWN;
+ break;
+ }
+ } else if (b >= 0x80) {
+ port->data[0] = b;
+ if (b >= 0xc0 && b <= 0xdf)
+ port->state = STATE_1PARAM;
+ else
+ port->state = STATE_2PARAM_1;
+ } else { /* b < 0x80 */
+ switch (port->state) {
+ case STATE_1PARAM:
+ if (port->data[0] < 0xf0) {
+ p0 |= port->data[0] >> 4;
+ } else {
+ p0 |= 0x02;
+ port->state = STATE_UNKNOWN;
+ }
+ f_midi_transmit_packet(req, p0, port->data[0], b, 0);
+ break;
+ case STATE_2PARAM_1:
+ port->data[1] = b;
+ port->state = STATE_2PARAM_2;
+ break;
+ case STATE_2PARAM_2:
+ if (port->data[0] < 0xf0) {
+ p0 |= port->data[0] >> 4;
+ port->state = STATE_2PARAM_1;
+ } else {
+ p0 |= 0x03;
+ port->state = STATE_UNKNOWN;
+ }
+ f_midi_transmit_packet(req,
+ p0, port->data[0], port->data[1], b);
+ break;
+ case STATE_SYSEX_0:
+ port->data[0] = b;
+ port->state = STATE_SYSEX_1;
+ break;
+ case STATE_SYSEX_1:
+ port->data[1] = b;
+ port->state = STATE_SYSEX_2;
+ break;
+ case STATE_SYSEX_2:
+ f_midi_transmit_packet(req,
+ p0 | 0x04, port->data[0], port->data[1], b);
+ port->state = STATE_SYSEX_0;
+ break;
+ }
+ }
+}
+
+static void f_midi_transmit(struct f_midi *midi, struct usb_request *req)
+{
+ struct usb_ep *ep = midi->in_ep;
+ int i;
+
+ if (!ep)
+ return;
+
+ if (!req)
+ req = midi_alloc_ep_req(ep, midi->buflen);
+
+ if (!req) {
+ ERROR(midi, "gmidi_transmit: alloc_ep_request failed\n");
+ return;
+ }
+ req->length = 0;
+ req->complete = f_midi_complete;
+
+ for (i = 0; i < MAX_PORTS; i++) {
+ struct gmidi_in_port *port = midi->in_port[i];
+ struct snd_rawmidi_substream *substream = midi->in_substream[i];
+
+ if (!port || !port->active || !substream)
+ continue;
+
+ while (req->length + 3 < midi->buflen) {
+ uint8_t b;
+ if (snd_rawmidi_transmit(substream, &b, 1) != 1) {
+ port->active = 0;
+ break;
+ }
+ f_midi_transmit_byte(req, port, b);
+ }
+ }
+
+ if (req->length > 0)
+ usb_ep_queue(ep, req, GFP_ATOMIC);
+ else
+ free_ep_req(ep, req);
+}
+
+static void f_midi_in_tasklet(unsigned long data)
+{
+ struct f_midi *midi = (struct f_midi *) data;
+ f_midi_transmit(midi, NULL);
+}
+
+static int f_midi_in_open(struct snd_rawmidi_substream *substream)
+{
+ struct f_midi *midi = substream->rmidi->private_data;
+
+ if (!midi->in_port[substream->number])
+ return -EINVAL;
+
+ VDBG(midi, "%s()\n", __func__);
+ midi->in_substream[substream->number] = substream;
+ midi->in_port[substream->number]->state = STATE_UNKNOWN;
+ return 0;
+}
+
+static int f_midi_in_close(struct snd_rawmidi_substream *substream)
+{
+ struct f_midi *midi = substream->rmidi->private_data;
+
+ VDBG(midi, "%s()\n", __func__);
+ return 0;
+}
+
+static void f_midi_in_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+ struct f_midi *midi = substream->rmidi->private_data;
+
+ if (!midi->in_port[substream->number])
+ return;
+
+ VDBG(midi, "%s() %d\n", __func__, up);
+ midi->in_port[substream->number]->active = up;
+ if (up)
+ tasklet_hi_schedule(&midi->tasklet);
+}
+
+static int f_midi_out_open(struct snd_rawmidi_substream *substream)
+{
+ struct f_midi *midi = substream->rmidi->private_data;
+
+ if (substream->number >= MAX_PORTS)
+ return -EINVAL;
+
+ VDBG(midi, "%s()\n", __func__);
+ midi->out_substream[substream->number] = substream;
+ return 0;
+}
+
+static int f_midi_out_close(struct snd_rawmidi_substream *substream)
+{
+ struct f_midi *midi = substream->rmidi->private_data;
+
+ VDBG(midi, "%s()\n", __func__);
+ return 0;
+}
+
+static void f_midi_out_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+ struct f_midi *midi = substream->rmidi->private_data;
+
+ VDBG(midi, "%s()\n", __func__);
+
+ if (up)
+ set_bit(substream->number, &midi->out_triggered);
+ else
+ clear_bit(substream->number, &midi->out_triggered);
+}
+
+static struct snd_rawmidi_ops gmidi_in_ops = {
+ .open = f_midi_in_open,
+ .close = f_midi_in_close,
+ .trigger = f_midi_in_trigger,
+};
+
+static struct snd_rawmidi_ops gmidi_out_ops = {
+ .open = f_midi_out_open,
+ .close = f_midi_out_close,
+ .trigger = f_midi_out_trigger
+};
+
+/* register as a sound "card" */
+static int f_midi_register_card(struct f_midi *midi)
+{
+ struct snd_card *card;
+ struct snd_rawmidi *rmidi;
+ int err;
+ static struct snd_device_ops ops = {
+ .dev_free = f_midi_snd_free,
+ };
+
+ err = snd_card_new(&midi->gadget->dev, midi->index, midi->id,
+ THIS_MODULE, 0, &card);
+ if (err < 0) {
+ ERROR(midi, "snd_card_new() failed\n");
+ goto fail;
+ }
+ midi->card = card;
+
+ err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, midi, &ops);
+ if (err < 0) {
+ ERROR(midi, "snd_device_new() failed: error %d\n", err);
+ goto fail;
+ }
+
+ strcpy(card->driver, f_midi_longname);
+ strcpy(card->longname, f_midi_longname);
+ strcpy(card->shortname, f_midi_shortname);
+
+ /* Set up rawmidi */
+ snd_component_add(card, "MIDI");
+ err = snd_rawmidi_new(card, card->longname, 0,
+ midi->out_ports, midi->in_ports, &rmidi);
+ if (err < 0) {
+ ERROR(midi, "snd_rawmidi_new() failed: error %d\n", err);
+ goto fail;
+ }
+ midi->rmidi = rmidi;
+ strcpy(rmidi->name, card->shortname);
+ rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+ rmidi->private_data = midi;
+
+ /*
+ * Yes, rawmidi OUTPUT = USB IN, and rawmidi INPUT = USB OUT.
+ * It's an upside-down world being a gadget.
+ */
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &gmidi_in_ops);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &gmidi_out_ops);
+
+ /* register it - we're ready to go */
+ err = snd_card_register(card);
+ if (err < 0) {
+ ERROR(midi, "snd_card_register() failed\n");
+ goto fail;
+ }
+
+ VDBG(midi, "%s() finished ok\n", __func__);
+ return 0;
+
+fail:
+ if (midi->card) {
+ snd_card_free(midi->card);
+ midi->card = NULL;
+ }
+ return err;
+}
+
+/* MIDI function driver setup/binding */
+
+static int __init
+f_midi_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_descriptor_header **midi_function;
+ struct usb_midi_in_jack_descriptor jack_in_ext_desc[MAX_PORTS];
+ struct usb_midi_in_jack_descriptor jack_in_emb_desc[MAX_PORTS];
+ struct usb_midi_out_jack_descriptor_1 jack_out_ext_desc[MAX_PORTS];
+ struct usb_midi_out_jack_descriptor_1 jack_out_emb_desc[MAX_PORTS];
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_midi *midi = func_to_midi(f);
+ int status, n, jack = 1, i = 0;
+
+ /* maybe allocate device-global string ID */
+ if (midi_string_defs[0].id == 0) {
+ status = usb_string_id(c->cdev);
+ if (status < 0)
+ goto fail;
+ midi_string_defs[0].id = status;
+ }
+
+ /* We have two interfaces, AudioControl and MIDIStreaming */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ac_interface_desc.bInterfaceNumber = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ms_interface_desc.bInterfaceNumber = status;
+ ac_header_desc.baInterfaceNr[0] = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ midi->in_ep = usb_ep_autoconfig(cdev->gadget, &bulk_in_desc);
+ if (!midi->in_ep)
+ goto fail;
+ midi->in_ep->driver_data = cdev; /* claim */
+
+ midi->out_ep = usb_ep_autoconfig(cdev->gadget, &bulk_out_desc);
+ if (!midi->out_ep)
+ goto fail;
+ midi->out_ep->driver_data = cdev; /* claim */
+
+ /* allocate temporary function list */
+ midi_function = kcalloc((MAX_PORTS * 4) + 9, sizeof(*midi_function),
+ GFP_KERNEL);
+ if (!midi_function) {
+ status = -ENOMEM;
+ goto fail;
+ }
+
+ /*
+ * construct the function's descriptor set. As the number of
+ * input and output MIDI ports is configurable, we have to do
+ * it that way.
+ */
+
+ /* add the headers - these are always the same */
+ midi_function[i++] = (struct usb_descriptor_header *) &ac_interface_desc;
+ midi_function[i++] = (struct usb_descriptor_header *) &ac_header_desc;
+ midi_function[i++] = (struct usb_descriptor_header *) &ms_interface_desc;
+
+ /* calculate the header's wTotalLength */
+ n = USB_DT_MS_HEADER_SIZE
+ + (midi->in_ports + midi->out_ports) *
+ (USB_DT_MIDI_IN_SIZE + USB_DT_MIDI_OUT_SIZE(1));
+ ms_header_desc.wTotalLength = cpu_to_le16(n);
+
+ midi_function[i++] = (struct usb_descriptor_header *) &ms_header_desc;
+
+ /* configure the external IN jacks, each linked to an embedded OUT jack */
+ for (n = 0; n < midi->in_ports; n++) {
+ struct usb_midi_in_jack_descriptor *in_ext = &jack_in_ext_desc[n];
+ struct usb_midi_out_jack_descriptor_1 *out_emb = &jack_out_emb_desc[n];
+
+ in_ext->bLength = USB_DT_MIDI_IN_SIZE;
+ in_ext->bDescriptorType = USB_DT_CS_INTERFACE;
+ in_ext->bDescriptorSubtype = USB_MS_MIDI_IN_JACK;
+ in_ext->bJackType = USB_MS_EXTERNAL;
+ in_ext->bJackID = jack++;
+ in_ext->iJack = 0;
+ midi_function[i++] = (struct usb_descriptor_header *) in_ext;
+
+ out_emb->bLength = USB_DT_MIDI_OUT_SIZE(1);
+ out_emb->bDescriptorType = USB_DT_CS_INTERFACE;
+ out_emb->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK;
+ out_emb->bJackType = USB_MS_EMBEDDED;
+ out_emb->bJackID = jack++;
+ out_emb->bNrInputPins = 1;
+ out_emb->pins[0].baSourcePin = 1;
+ out_emb->pins[0].baSourceID = in_ext->bJackID;
+ out_emb->iJack = 0;
+ midi_function[i++] = (struct usb_descriptor_header *) out_emb;
+
+ /* link it to the endpoint */
+ ms_in_desc.baAssocJackID[n] = out_emb->bJackID;
+ }
+
+ /* configure the external OUT jacks, each linked to an embedded IN jack */
+ for (n = 0; n < midi->out_ports; n++) {
+ struct usb_midi_in_jack_descriptor *in_emb = &jack_in_emb_desc[n];
+ struct usb_midi_out_jack_descriptor_1 *out_ext = &jack_out_ext_desc[n];
+
+ in_emb->bLength = USB_DT_MIDI_IN_SIZE;
+ in_emb->bDescriptorType = USB_DT_CS_INTERFACE;
+ in_emb->bDescriptorSubtype = USB_MS_MIDI_IN_JACK;
+ in_emb->bJackType = USB_MS_EMBEDDED;
+ in_emb->bJackID = jack++;
+ in_emb->iJack = 0;
+ midi_function[i++] = (struct usb_descriptor_header *) in_emb;
+
+ out_ext->bLength = USB_DT_MIDI_OUT_SIZE(1);
+ out_ext->bDescriptorType = USB_DT_CS_INTERFACE;
+ out_ext->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK;
+ out_ext->bJackType = USB_MS_EXTERNAL;
+ out_ext->bJackID = jack++;
+ out_ext->bNrInputPins = 1;
+ out_ext->iJack = 0;
+ out_ext->pins[0].baSourceID = in_emb->bJackID;
+ out_ext->pins[0].baSourcePin = 1;
+ midi_function[i++] = (struct usb_descriptor_header *) out_ext;
+
+ /* link it to the endpoint */
+ ms_out_desc.baAssocJackID[n] = in_emb->bJackID;
+ }
+
+ /* configure the endpoint descriptors ... */
+ ms_out_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->in_ports);
+ ms_out_desc.bNumEmbMIDIJack = midi->in_ports;
+
+ ms_in_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->out_ports);
+ ms_in_desc.bNumEmbMIDIJack = midi->out_ports;
+
+ /* ... and add them to the list */
+ midi_function[i++] = (struct usb_descriptor_header *) &bulk_out_desc;
+ midi_function[i++] = (struct usb_descriptor_header *) &ms_out_desc;
+ midi_function[i++] = (struct usb_descriptor_header *) &bulk_in_desc;
+ midi_function[i++] = (struct usb_descriptor_header *) &ms_in_desc;
+ midi_function[i++] = NULL;
+
+ /*
+ * support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ /* copy descriptors, and track endpoint copies */
+ f->fs_descriptors = usb_copy_descriptors(midi_function);
+ if (!f->fs_descriptors)
+ goto fail_f_midi;
+
+ if (gadget_is_dualspeed(c->cdev->gadget)) {
+ bulk_in_desc.wMaxPacketSize = cpu_to_le16(512);
+ bulk_out_desc.wMaxPacketSize = cpu_to_le16(512);
+ f->hs_descriptors = usb_copy_descriptors(midi_function);
+ if (!f->hs_descriptors)
+ goto fail_f_midi;
+ }
+
+ kfree(midi_function);
+
+ return 0;
+
+fail_f_midi:
+ kfree(midi_function);
+ usb_free_descriptors(f->hs_descriptors);
+fail:
+ /* we might as well release our claims on endpoints */
+ if (midi->out_ep)
+ midi->out_ep->driver_data = NULL;
+ if (midi->in_ep)
+ midi->in_ep->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+/**
+ * f_midi_bind_config - add USB MIDI function to a configuration
+ * @c: the configuration to supcard the USB audio function
+ * @index: the soundcard index to use for the ALSA device creation
+ * @id: the soundcard id to use for the ALSA device creation
+ * @buflen: the buffer length to use
+ * @qlen the number of read requests to pre-allocate
+ * Context: single threaded during gadget setup
+ *
+ * Returns zero on success, else negative errno.
+ */
+int __init f_midi_bind_config(struct usb_configuration *c,
+ int index, char *id,
+ unsigned int in_ports,
+ unsigned int out_ports,
+ unsigned int buflen,
+ unsigned int qlen)
+{
+ struct f_midi *midi;
+ int status, i;
+
+ /* sanity check */
+ if (in_ports > MAX_PORTS || out_ports > MAX_PORTS)
+ return -EINVAL;
+
+ /* allocate and initialize one new instance */
+ midi = kzalloc(sizeof *midi, GFP_KERNEL);
+ if (!midi) {
+ status = -ENOMEM;
+ goto fail;
+ }
+
+ for (i = 0; i < in_ports; i++) {
+ struct gmidi_in_port *port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port) {
+ status = -ENOMEM;
+ goto setup_fail;
+ }
+
+ port->midi = midi;
+ port->active = 0;
+ port->cable = i;
+ midi->in_port[i] = port;
+ }
+
+ midi->gadget = c->cdev->gadget;
+ tasklet_init(&midi->tasklet, f_midi_in_tasklet, (unsigned long) midi);
+
+ /* set up ALSA midi devices */
+ midi->in_ports = in_ports;
+ midi->out_ports = out_ports;
+ status = f_midi_register_card(midi);
+ if (status < 0)
+ goto setup_fail;
+
+ midi->func.name = "gmidi function";
+ midi->func.strings = midi_strings;
+ midi->func.bind = f_midi_bind;
+ midi->func.unbind = f_midi_unbind;
+ midi->func.set_alt = f_midi_set_alt;
+ midi->func.disable = f_midi_disable;
+
+ midi->id = kstrdup(id, GFP_KERNEL);
+ midi->index = index;
+ midi->buflen = buflen;
+ midi->qlen = qlen;
+
+ status = usb_add_function(c, &midi->func);
+ if (status)
+ goto setup_fail;
+
+ return 0;
+
+setup_fail:
+ for (--i; i >= 0; i--)
+ kfree(midi->in_port[i]);
+ kfree(midi);
+fail:
+ return status;
+}
+
--- /dev/null
+/*
+ * f_ncm.c -- USB CDC Network (NCM) link function driver
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Contact: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
+ *
+ * The driver borrows from f_ecm.c which is:
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/crc32.h>
+
+#include <linux/usb/cdc.h>
+
+#include "u_ether.h"
+#include "u_ether_configfs.h"
+#include "u_ncm.h"
+
+/*
+ * This function is a "CDC Network Control Model" (CDC NCM) Ethernet link.
+ * NCM is intended to be used with high-speed network attachments.
+ *
+ * Note that NCM requires the use of "alternate settings" for its data
+ * interface. This means that the set_alt() method has real work to do,
+ * and also means that a get_alt() method is required.
+ */
+
+/* to trigger crc/non-crc ndp signature */
+
+#define NCM_NDP_HDR_CRC_MASK 0x01000000
+#define NCM_NDP_HDR_CRC 0x01000000
+#define NCM_NDP_HDR_NOCRC 0x00000000
+
+enum ncm_notify_state {
+ NCM_NOTIFY_NONE, /* don't notify */
+ NCM_NOTIFY_CONNECT, /* issue CONNECT next */
+ NCM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */
+};
+
+struct f_ncm {
+ struct gether port;
+ u8 ctrl_id, data_id;
+
+ char ethaddr[14];
+
+ struct usb_ep *notify;
+ struct usb_request *notify_req;
+ u8 notify_state;
+ bool is_open;
+
+ const struct ndp_parser_opts *parser_opts;
+ bool is_crc;
+ u32 ndp_sign;
+
+ /*
+ * for notification, it is accessed from both
+ * callback and ethernet open/close
+ */
+ spinlock_t lock;
+
+ struct net_device *netdev;
+
+ /* For multi-frame NDP TX */
+ struct sk_buff *skb_tx_data;
+ struct sk_buff *skb_tx_ndp;
+ u16 ndp_dgram_count;
+ bool timer_force_tx;
+ struct tasklet_struct tx_tasklet;
+ struct hrtimer task_timer;
+
+ bool timer_stopping;
+};
+
+static inline struct f_ncm *func_to_ncm(struct usb_function *f)
+{
+ return container_of(f, struct f_ncm, port.func);
+}
+
+/* peak (theoretical) bulk transfer rate in bits-per-second */
+static inline unsigned ncm_bitrate(struct usb_gadget *g)
+{
+ if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+ return 13 * 512 * 8 * 1000 * 8;
+ else
+ return 19 * 64 * 1 * 1000 * 8;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * We cannot group frames so use just the minimal size which ok to put
+ * one max-size ethernet frame.
+ * If the host can group frames, allow it to do that, 16K is selected,
+ * because it's used by default by the current linux host driver
+ */
+#define NTB_DEFAULT_IN_SIZE 16384
+#define NTB_OUT_SIZE 16384
+
+/* Allocation for storing the NDP, 32 should suffice for a
+ * 16k packet. This allows a maximum of 32 * 507 Byte packets to
+ * be transmitted in a single 16kB skb, though when sending full size
+ * packets this limit will be plenty.
+ * Smaller packets are not likely to be trying to maximize the
+ * throughput and will be mstly sending smaller infrequent frames.
+ */
+#define TX_MAX_NUM_DPE 32
+
+/* Delay for the transmit to wait before sending an unfilled NTB frame. */
+#define TX_TIMEOUT_NSECS 300000
+
+#define FORMATS_SUPPORTED (USB_CDC_NCM_NTB16_SUPPORTED | \
+ USB_CDC_NCM_NTB32_SUPPORTED)
+
+static struct usb_cdc_ncm_ntb_parameters ntb_parameters = {
+ .wLength = cpu_to_le16(sizeof(ntb_parameters)),
+ .bmNtbFormatsSupported = cpu_to_le16(FORMATS_SUPPORTED),
+ .dwNtbInMaxSize = cpu_to_le32(NTB_DEFAULT_IN_SIZE),
+ .wNdpInDivisor = cpu_to_le16(4),
+ .wNdpInPayloadRemainder = cpu_to_le16(0),
+ .wNdpInAlignment = cpu_to_le16(4),
+
+ .dwNtbOutMaxSize = cpu_to_le32(NTB_OUT_SIZE),
+ .wNdpOutDivisor = cpu_to_le16(4),
+ .wNdpOutPayloadRemainder = cpu_to_le16(0),
+ .wNdpOutAlignment = cpu_to_le16(4),
+};
+
+/*
+ * Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
+ * packet, to simplify cancellation; and a big transfer interval, to
+ * waste less bandwidth.
+ */
+
+#define NCM_STATUS_INTERVAL_MS 32
+#define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */
+
+static struct usb_interface_assoc_descriptor ncm_iad_desc = {
+ .bLength = sizeof ncm_iad_desc,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ /* .bFirstInterface = DYNAMIC, */
+ .bInterfaceCount = 2, /* control + data */
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_NCM,
+ .bFunctionProtocol = USB_CDC_PROTO_NONE,
+ /* .iFunction = DYNAMIC */
+};
+
+/* interface descriptor: */
+
+static struct usb_interface_descriptor ncm_control_intf = {
+ .bLength = sizeof ncm_control_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
+ .bInterfaceProtocol = USB_CDC_PROTO_NONE,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_cdc_header_desc ncm_header_desc = {
+ .bLength = sizeof ncm_header_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+
+ .bcdCDC = cpu_to_le16(0x0110),
+};
+
+static struct usb_cdc_union_desc ncm_union_desc = {
+ .bLength = sizeof(ncm_union_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+ /* .bMasterInterface0 = DYNAMIC */
+ /* .bSlaveInterface0 = DYNAMIC */
+};
+
+static struct usb_cdc_ether_desc ecm_desc = {
+ .bLength = sizeof ecm_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
+
+ /* this descriptor actually adds value, surprise! */
+ /* .iMACAddress = DYNAMIC */
+ .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
+ .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
+ .wNumberMCFilters = cpu_to_le16(0),
+ .bNumberPowerFilters = 0,
+};
+
+#define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE)
+
+static struct usb_cdc_ncm_desc ncm_desc = {
+ .bLength = sizeof ncm_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_NCM_TYPE,
+
+ .bcdNcmVersion = cpu_to_le16(0x0100),
+ /* can process SetEthernetPacketFilter */
+ .bmNetworkCapabilities = NCAPS,
+};
+
+/* the default data interface has no endpoints ... */
+
+static struct usb_interface_descriptor ncm_data_nop_intf = {
+ .bLength = sizeof ncm_data_nop_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
+ /* .iInterface = DYNAMIC */
+};
+
+/* ... but the "real" data interface has two bulk endpoints */
+
+static struct usb_interface_descriptor ncm_data_intf = {
+ .bLength = sizeof ncm_data_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_ncm_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
+ .bInterval = NCM_STATUS_INTERVAL_MS,
+};
+
+static struct usb_endpoint_descriptor fs_ncm_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_ncm_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *ncm_fs_function[] = {
+ (struct usb_descriptor_header *) &ncm_iad_desc,
+ /* CDC NCM control descriptors */
+ (struct usb_descriptor_header *) &ncm_control_intf,
+ (struct usb_descriptor_header *) &ncm_header_desc,
+ (struct usb_descriptor_header *) &ncm_union_desc,
+ (struct usb_descriptor_header *) &ecm_desc,
+ (struct usb_descriptor_header *) &ncm_desc,
+ (struct usb_descriptor_header *) &fs_ncm_notify_desc,
+ /* data interface, altsettings 0 and 1 */
+ (struct usb_descriptor_header *) &ncm_data_nop_intf,
+ (struct usb_descriptor_header *) &ncm_data_intf,
+ (struct usb_descriptor_header *) &fs_ncm_in_desc,
+ (struct usb_descriptor_header *) &fs_ncm_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_ncm_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
+ .bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS),
+};
+static struct usb_endpoint_descriptor hs_ncm_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_ncm_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *ncm_hs_function[] = {
+ (struct usb_descriptor_header *) &ncm_iad_desc,
+ /* CDC NCM control descriptors */
+ (struct usb_descriptor_header *) &ncm_control_intf,
+ (struct usb_descriptor_header *) &ncm_header_desc,
+ (struct usb_descriptor_header *) &ncm_union_desc,
+ (struct usb_descriptor_header *) &ecm_desc,
+ (struct usb_descriptor_header *) &ncm_desc,
+ (struct usb_descriptor_header *) &hs_ncm_notify_desc,
+ /* data interface, altsettings 0 and 1 */
+ (struct usb_descriptor_header *) &ncm_data_nop_intf,
+ (struct usb_descriptor_header *) &ncm_data_intf,
+ (struct usb_descriptor_header *) &hs_ncm_in_desc,
+ (struct usb_descriptor_header *) &hs_ncm_out_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+#define STRING_CTRL_IDX 0
+#define STRING_MAC_IDX 1
+#define STRING_DATA_IDX 2
+#define STRING_IAD_IDX 3
+
+static struct usb_string ncm_string_defs[] = {
+ [STRING_CTRL_IDX].s = "CDC Network Control Model (NCM)",
+ [STRING_MAC_IDX].s = "",
+ [STRING_DATA_IDX].s = "CDC Network Data",
+ [STRING_IAD_IDX].s = "CDC NCM",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings ncm_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = ncm_string_defs,
+};
+
+static struct usb_gadget_strings *ncm_strings[] = {
+ &ncm_string_table,
+ NULL,
+};
+
+/*
+ * Here are options for NCM Datagram Pointer table (NDP) parser.
+ * There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3),
+ * in NDP16 offsets and sizes fields are 1 16bit word wide,
+ * in NDP32 -- 2 16bit words wide. Also signatures are different.
+ * To make the parser code the same, put the differences in the structure,
+ * and switch pointers to the structures when the format is changed.
+ */
+
+struct ndp_parser_opts {
+ u32 nth_sign;
+ u32 ndp_sign;
+ unsigned nth_size;
+ unsigned ndp_size;
+ unsigned dpe_size;
+ unsigned ndplen_align;
+ /* sizes in u16 units */
+ unsigned dgram_item_len; /* index or length */
+ unsigned block_length;
+ unsigned ndp_index;
+ unsigned reserved1;
+ unsigned reserved2;
+ unsigned next_ndp_index;
+};
+
+#define INIT_NDP16_OPTS { \
+ .nth_sign = USB_CDC_NCM_NTH16_SIGN, \
+ .ndp_sign = USB_CDC_NCM_NDP16_NOCRC_SIGN, \
+ .nth_size = sizeof(struct usb_cdc_ncm_nth16), \
+ .ndp_size = sizeof(struct usb_cdc_ncm_ndp16), \
+ .dpe_size = sizeof(struct usb_cdc_ncm_dpe16), \
+ .ndplen_align = 4, \
+ .dgram_item_len = 1, \
+ .block_length = 1, \
+ .ndp_index = 1, \
+ .reserved1 = 0, \
+ .reserved2 = 0, \
+ .next_ndp_index = 1, \
+ }
+
+
+#define INIT_NDP32_OPTS { \
+ .nth_sign = USB_CDC_NCM_NTH32_SIGN, \
+ .ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN, \
+ .nth_size = sizeof(struct usb_cdc_ncm_nth32), \
+ .ndp_size = sizeof(struct usb_cdc_ncm_ndp32), \
+ .dpe_size = sizeof(struct usb_cdc_ncm_dpe32), \
+ .ndplen_align = 8, \
+ .dgram_item_len = 2, \
+ .block_length = 2, \
+ .ndp_index = 2, \
+ .reserved1 = 1, \
+ .reserved2 = 2, \
+ .next_ndp_index = 2, \
+ }
+
+static const struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS;
+static const struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS;
+
+static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
+{
+ switch (size) {
+ case 1:
+ put_unaligned_le16((u16)val, *p);
+ break;
+ case 2:
+ put_unaligned_le32((u32)val, *p);
+
+ break;
+ default:
+ BUG();
+ }
+
+ *p += size;
+}
+
+static inline unsigned get_ncm(__le16 **p, unsigned size)
+{
+ unsigned tmp;
+
+ switch (size) {
+ case 1:
+ tmp = get_unaligned_le16(*p);
+ break;
+ case 2:
+ tmp = get_unaligned_le32(*p);
+ break;
+ default:
+ BUG();
+ }
+
+ *p += size;
+ return tmp;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static inline void ncm_reset_values(struct f_ncm *ncm)
+{
+ ncm->parser_opts = &ndp16_opts;
+ ncm->is_crc = false;
+ ncm->port.cdc_filter = DEFAULT_FILTER;
+
+ /* doesn't make sense for ncm, fixed size used */
+ ncm->port.header_len = 0;
+
+ ncm->port.fixed_out_len = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
+ ncm->port.fixed_in_len = NTB_DEFAULT_IN_SIZE;
+}
+
+/*
+ * Context: ncm->lock held
+ */
+static void ncm_do_notify(struct f_ncm *ncm)
+{
+ struct usb_request *req = ncm->notify_req;
+ struct usb_cdc_notification *event;
+ struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
+ __le32 *data;
+ int status;
+
+ /* notification already in flight? */
+ if (!req)
+ return;
+
+ event = req->buf;
+ switch (ncm->notify_state) {
+ case NCM_NOTIFY_NONE:
+ return;
+
+ case NCM_NOTIFY_CONNECT:
+ event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
+ if (ncm->is_open)
+ event->wValue = cpu_to_le16(1);
+ else
+ event->wValue = cpu_to_le16(0);
+ event->wLength = 0;
+ req->length = sizeof *event;
+
+ DBG(cdev, "notify connect %s\n",
+ ncm->is_open ? "true" : "false");
+ ncm->notify_state = NCM_NOTIFY_NONE;
+ break;
+
+ case NCM_NOTIFY_SPEED:
+ event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
+ event->wValue = cpu_to_le16(0);
+ event->wLength = cpu_to_le16(8);
+ req->length = NCM_STATUS_BYTECOUNT;
+
+ /* SPEED_CHANGE data is up/down speeds in bits/sec */
+ data = req->buf + sizeof *event;
+ data[0] = cpu_to_le32(ncm_bitrate(cdev->gadget));
+ data[1] = data[0];
+
+ DBG(cdev, "notify speed %d\n", ncm_bitrate(cdev->gadget));
+ ncm->notify_state = NCM_NOTIFY_CONNECT;
+ break;
+ }
+ event->bmRequestType = 0xA1;
+ event->wIndex = cpu_to_le16(ncm->ctrl_id);
+
+ ncm->notify_req = NULL;
+ /*
+ * In double buffering if there is a space in FIFO,
+ * completion callback can be called right after the call,
+ * so unlocking
+ */
+ spin_unlock(&ncm->lock);
+ status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC);
+ spin_lock(&ncm->lock);
+ if (status < 0) {
+ ncm->notify_req = req;
+ DBG(cdev, "notify --> %d\n", status);
+ }
+}
+
+/*
+ * Context: ncm->lock held
+ */
+static void ncm_notify(struct f_ncm *ncm)
+{
+ /*
+ * NOTE on most versions of Linux, host side cdc-ethernet
+ * won't listen for notifications until its netdevice opens.
+ * The first notification then sits in the FIFO for a long
+ * time, and the second one is queued.
+ *
+ * If ncm_notify() is called before the second (CONNECT)
+ * notification is sent, then it will reset to send the SPEED
+ * notificaion again (and again, and again), but it's not a problem
+ */
+ ncm->notify_state = NCM_NOTIFY_SPEED;
+ ncm_do_notify(ncm);
+}
+
+static void ncm_notify_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_ncm *ncm = req->context;
+ struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
+ struct usb_cdc_notification *event = req->buf;
+
+ spin_lock(&ncm->lock);
+ switch (req->status) {
+ case 0:
+ VDBG(cdev, "Notification %02x sent\n",
+ event->bNotificationType);
+ break;
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ ncm->notify_state = NCM_NOTIFY_NONE;
+ break;
+ default:
+ DBG(cdev, "event %02x --> %d\n",
+ event->bNotificationType, req->status);
+ break;
+ }
+ ncm->notify_req = req;
+ ncm_do_notify(ncm);
+ spin_unlock(&ncm->lock);
+}
+
+static void ncm_ep0out_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ /* now for SET_NTB_INPUT_SIZE only */
+ unsigned in_size;
+ struct usb_function *f = req->context;
+ struct f_ncm *ncm = func_to_ncm(f);
+ struct usb_composite_dev *cdev = ep->driver_data;
+
+ req->context = NULL;
+ if (req->status || req->actual != req->length) {
+ DBG(cdev, "Bad control-OUT transfer\n");
+ goto invalid;
+ }
+
+ in_size = get_unaligned_le32(req->buf);
+ if (in_size < USB_CDC_NCM_NTB_MIN_IN_SIZE ||
+ in_size > le32_to_cpu(ntb_parameters.dwNtbInMaxSize)) {
+ DBG(cdev, "Got wrong INPUT SIZE (%d) from host\n", in_size);
+ goto invalid;
+ }
+
+ ncm->port.fixed_in_len = in_size;
+ VDBG(cdev, "Set NTB INPUT SIZE %d\n", in_size);
+ return;
+
+invalid:
+ usb_ep_set_halt(ep);
+ return;
+}
+
+static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct f_ncm *ncm = func_to_ncm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ /*
+ * composite driver infrastructure handles everything except
+ * CDC class messages; interface activation uses set_alt().
+ */
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SET_ETHERNET_PACKET_FILTER:
+ /*
+ * see 6.2.30: no data, wIndex = interface,
+ * wValue = packet filter bitmap
+ */
+ if (w_length != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ DBG(cdev, "packet filter %02x\n", w_value);
+ /*
+ * REVISIT locking of cdc_filter. This assumes the UDC
+ * driver won't have a concurrent packet TX irq running on
+ * another CPU; or that if it does, this write is atomic...
+ */
+ ncm->port.cdc_filter = w_value;
+ value = 0;
+ break;
+ /*
+ * and optionally:
+ * case USB_CDC_SEND_ENCAPSULATED_COMMAND:
+ * case USB_CDC_GET_ENCAPSULATED_RESPONSE:
+ * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
+ * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
+ * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
+ * case USB_CDC_GET_ETHERNET_STATISTIC:
+ */
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_GET_NTB_PARAMETERS:
+
+ if (w_length == 0 || w_value != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ value = w_length > sizeof ntb_parameters ?
+ sizeof ntb_parameters : w_length;
+ memcpy(req->buf, &ntb_parameters, value);
+ VDBG(cdev, "Host asked NTB parameters\n");
+ break;
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_GET_NTB_INPUT_SIZE:
+
+ if (w_length < 4 || w_value != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ put_unaligned_le32(ncm->port.fixed_in_len, req->buf);
+ value = 4;
+ VDBG(cdev, "Host asked INPUT SIZE, sending %d\n",
+ ncm->port.fixed_in_len);
+ break;
+
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SET_NTB_INPUT_SIZE:
+ {
+ if (w_length != 4 || w_value != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ req->complete = ncm_ep0out_complete;
+ req->length = w_length;
+ req->context = f;
+
+ value = req->length;
+ break;
+ }
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_GET_NTB_FORMAT:
+ {
+ uint16_t format;
+
+ if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ format = (ncm->parser_opts == &ndp16_opts) ? 0x0000 : 0x0001;
+ put_unaligned_le16(format, req->buf);
+ value = 2;
+ VDBG(cdev, "Host asked NTB FORMAT, sending %d\n", format);
+ break;
+ }
+
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SET_NTB_FORMAT:
+ {
+ if (w_length != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ switch (w_value) {
+ case 0x0000:
+ ncm->parser_opts = &ndp16_opts;
+ DBG(cdev, "NCM16 selected\n");
+ break;
+ case 0x0001:
+ ncm->parser_opts = &ndp32_opts;
+ DBG(cdev, "NCM32 selected\n");
+ break;
+ default:
+ goto invalid;
+ }
+ value = 0;
+ break;
+ }
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_GET_CRC_MODE:
+ {
+ uint16_t is_crc;
+
+ if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ is_crc = ncm->is_crc ? 0x0001 : 0x0000;
+ put_unaligned_le16(is_crc, req->buf);
+ value = 2;
+ VDBG(cdev, "Host asked CRC MODE, sending %d\n", is_crc);
+ break;
+ }
+
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SET_CRC_MODE:
+ {
+ int ndp_hdr_crc = 0;
+
+ if (w_length != 0 || w_index != ncm->ctrl_id)
+ goto invalid;
+ switch (w_value) {
+ case 0x0000:
+ ncm->is_crc = false;
+ ndp_hdr_crc = NCM_NDP_HDR_NOCRC;
+ DBG(cdev, "non-CRC mode selected\n");
+ break;
+ case 0x0001:
+ ncm->is_crc = true;
+ ndp_hdr_crc = NCM_NDP_HDR_CRC;
+ DBG(cdev, "CRC mode selected\n");
+ break;
+ default:
+ goto invalid;
+ }
+ ncm->ndp_sign = ncm->parser_opts->ndp_sign | ndp_hdr_crc;
+ value = 0;
+ break;
+ }
+
+ /* and disabled in ncm descriptor: */
+ /* case USB_CDC_GET_NET_ADDRESS: */
+ /* case USB_CDC_SET_NET_ADDRESS: */
+ /* case USB_CDC_GET_MAX_DATAGRAM_SIZE: */
+ /* case USB_CDC_SET_MAX_DATAGRAM_SIZE: */
+
+ default:
+invalid:
+ DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ }
+
+ /* respond with data transfer or status phase? */
+ if (value >= 0) {
+ DBG(cdev, "ncm req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = 0;
+ req->length = value;
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0)
+ ERROR(cdev, "ncm req %02x.%02x response err %d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ value);
+ }
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+
+static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_ncm *ncm = func_to_ncm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ /* Control interface has only altsetting 0 */
+ if (intf == ncm->ctrl_id) {
+ if (alt != 0)
+ goto fail;
+
+ if (ncm->notify->driver_data) {
+ DBG(cdev, "reset ncm control %d\n", intf);
+ usb_ep_disable(ncm->notify);
+ }
+
+ if (!(ncm->notify->desc)) {
+ DBG(cdev, "init ncm ctrl %d\n", intf);
+ if (config_ep_by_speed(cdev->gadget, f, ncm->notify))
+ goto fail;
+ }
+ usb_ep_enable(ncm->notify);
+ ncm->notify->driver_data = ncm;
+
+ /* Data interface has two altsettings, 0 and 1 */
+ } else if (intf == ncm->data_id) {
+ if (alt > 1)
+ goto fail;
+
+ if (ncm->port.in_ep->driver_data) {
+ DBG(cdev, "reset ncm\n");
+ ncm->timer_stopping = true;
+ ncm->netdev = NULL;
+ gether_disconnect(&ncm->port);
+ ncm_reset_values(ncm);
+ }
+
+ /*
+ * CDC Network only sends data in non-default altsettings.
+ * Changing altsettings resets filters, statistics, etc.
+ */
+ if (alt == 1) {
+ struct net_device *net;
+
+ if (!ncm->port.in_ep->desc ||
+ !ncm->port.out_ep->desc) {
+ DBG(cdev, "init ncm\n");
+ if (config_ep_by_speed(cdev->gadget, f,
+ ncm->port.in_ep) ||
+ config_ep_by_speed(cdev->gadget, f,
+ ncm->port.out_ep)) {
+ ncm->port.in_ep->desc = NULL;
+ ncm->port.out_ep->desc = NULL;
+ goto fail;
+ }
+ }
+
+ /* TODO */
+ /* Enable zlps by default for NCM conformance;
+ * override for musb_hdrc (avoids txdma ovhead)
+ */
+ ncm->port.is_zlp_ok = !(
+ gadget_is_musbhdrc(cdev->gadget)
+ );
+ ncm->port.cdc_filter = DEFAULT_FILTER;
+ DBG(cdev, "activate ncm\n");
+ net = gether_connect(&ncm->port);
+ if (IS_ERR(net))
+ return PTR_ERR(net);
+ ncm->netdev = net;
+ ncm->timer_stopping = false;
+ }
+
+ spin_lock(&ncm->lock);
+ ncm_notify(ncm);
+ spin_unlock(&ncm->lock);
+ } else
+ goto fail;
+
+ return 0;
+fail:
+ return -EINVAL;
+}
+
+/*
+ * Because the data interface supports multiple altsettings,
+ * this NCM function *MUST* implement a get_alt() method.
+ */
+static int ncm_get_alt(struct usb_function *f, unsigned intf)
+{
+ struct f_ncm *ncm = func_to_ncm(f);
+
+ if (intf == ncm->ctrl_id)
+ return 0;
+ return ncm->port.in_ep->driver_data ? 1 : 0;
+}
+
+static struct sk_buff *package_for_tx(struct f_ncm *ncm)
+{
+ __le16 *ntb_iter;
+ struct sk_buff *skb2 = NULL;
+ unsigned ndp_pad;
+ unsigned ndp_index;
+ unsigned new_len;
+
+ const struct ndp_parser_opts *opts = ncm->parser_opts;
+ const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
+ const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
+
+ /* Stop the timer */
+ hrtimer_try_to_cancel(&ncm->task_timer);
+
+ ndp_pad = ALIGN(ncm->skb_tx_data->len, ndp_align) -
+ ncm->skb_tx_data->len;
+ ndp_index = ncm->skb_tx_data->len + ndp_pad;
+ new_len = ndp_index + dgram_idx_len + ncm->skb_tx_ndp->len;
+
+ /* Set the final BlockLength and wNdpIndex */
+ ntb_iter = (void *) ncm->skb_tx_data->data;
+ /* Increment pointer to BlockLength */
+ ntb_iter += 2 + 1 + 1;
+ put_ncm(&ntb_iter, opts->block_length, new_len);
+ put_ncm(&ntb_iter, opts->ndp_index, ndp_index);
+
+ /* Set the final NDP wLength */
+ new_len = opts->ndp_size +
+ (ncm->ndp_dgram_count * dgram_idx_len);
+ ncm->ndp_dgram_count = 0;
+ /* Increment from start to wLength */
+ ntb_iter = (void *) ncm->skb_tx_ndp->data;
+ ntb_iter += 2;
+ put_unaligned_le16(new_len, ntb_iter);
+
+ /* Merge the skbs */
+ swap(skb2, ncm->skb_tx_data);
+ if (ncm->skb_tx_data) {
+ dev_kfree_skb_any(ncm->skb_tx_data);
+ ncm->skb_tx_data = NULL;
+ }
+
+ /* Insert NDP alignment. */
+ ntb_iter = (void *) skb_put(skb2, ndp_pad);
+ memset(ntb_iter, 0, ndp_pad);
+
+ /* Copy NTB across. */
+ ntb_iter = (void *) skb_put(skb2, ncm->skb_tx_ndp->len);
+ memcpy(ntb_iter, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len);
+ dev_kfree_skb_any(ncm->skb_tx_ndp);
+ ncm->skb_tx_ndp = NULL;
+
+ /* Insert zero'd datagram. */
+ ntb_iter = (void *) skb_put(skb2, dgram_idx_len);
+ memset(ntb_iter, 0, dgram_idx_len);
+
+ return skb2;
+}
+
+static struct sk_buff *ncm_wrap_ntb(struct gether *port,
+ struct sk_buff *skb)
+{
+ struct f_ncm *ncm = func_to_ncm(&port->func);
+ struct sk_buff *skb2 = NULL;
+ int ncb_len = 0;
+ __le16 *ntb_data;
+ __le16 *ntb_ndp;
+ int dgram_pad;
+
+ unsigned max_size = ncm->port.fixed_in_len;
+ const struct ndp_parser_opts *opts = ncm->parser_opts;
+ const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
+ const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
+ const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder);
+ const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
+
+ if (!skb && !ncm->skb_tx_data)
+ return NULL;
+
+ if (skb) {
+ /* Add the CRC if required up front */
+ if (ncm->is_crc) {
+ uint32_t crc;
+ __le16 *crc_pos;
+
+ crc = ~crc32_le(~0,
+ skb->data,
+ skb->len);
+ crc_pos = (void *) skb_put(skb, sizeof(uint32_t));
+ put_unaligned_le32(crc, crc_pos);
+ }
+
+ /* If the new skb is too big for the current NCM NTB then
+ * set the current stored skb to be sent now and clear it
+ * ready for new data.
+ * NOTE: Assume maximum align for speed of calculation.
+ */
+ if (ncm->skb_tx_data
+ && (ncm->ndp_dgram_count >= TX_MAX_NUM_DPE
+ || (ncm->skb_tx_data->len +
+ div + rem + skb->len +
+ ncm->skb_tx_ndp->len + ndp_align + (2 * dgram_idx_len))
+ > max_size)) {
+ skb2 = package_for_tx(ncm);
+ if (!skb2)
+ goto err;
+ }
+
+ if (!ncm->skb_tx_data) {
+ ncb_len = opts->nth_size;
+ dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
+ ncb_len += dgram_pad;
+
+ /* Create a new skb for the NTH and datagrams. */
+ ncm->skb_tx_data = alloc_skb(max_size, GFP_ATOMIC);
+ if (!ncm->skb_tx_data)
+ goto err;
+
+ ntb_data = (void *) skb_put(ncm->skb_tx_data, ncb_len);
+ memset(ntb_data, 0, ncb_len);
+ /* dwSignature */
+ put_unaligned_le32(opts->nth_sign, ntb_data);
+ ntb_data += 2;
+ /* wHeaderLength */
+ put_unaligned_le16(opts->nth_size, ntb_data++);
+
+ /* Allocate an skb for storing the NDP,
+ * TX_MAX_NUM_DPE should easily suffice for a
+ * 16k packet.
+ */
+ ncm->skb_tx_ndp = alloc_skb((int)(opts->ndp_size
+ + opts->dpe_size
+ * TX_MAX_NUM_DPE),
+ GFP_ATOMIC);
+ if (!ncm->skb_tx_ndp)
+ goto err;
+ ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp,
+ opts->ndp_size);
+ memset(ntb_ndp, 0, ncb_len);
+ /* dwSignature */
+ put_unaligned_le32(ncm->ndp_sign, ntb_ndp);
+ ntb_ndp += 2;
+
+ /* There is always a zeroed entry */
+ ncm->ndp_dgram_count = 1;
+
+ /* Note: we skip opts->next_ndp_index */
+ }
+
+ /* Delay the timer. */
+ hrtimer_start(&ncm->task_timer,
+ ktime_set(0, TX_TIMEOUT_NSECS),
+ HRTIMER_MODE_REL);
+
+ /* Add the datagram position entries */
+ ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp, dgram_idx_len);
+ memset(ntb_ndp, 0, dgram_idx_len);
+
+ ncb_len = ncm->skb_tx_data->len;
+ dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
+ ncb_len += dgram_pad;
+
+ /* (d)wDatagramIndex */
+ put_ncm(&ntb_ndp, opts->dgram_item_len, ncb_len);
+ /* (d)wDatagramLength */
+ put_ncm(&ntb_ndp, opts->dgram_item_len, skb->len);
+ ncm->ndp_dgram_count++;
+
+ /* Add the new data to the skb */
+ ntb_data = (void *) skb_put(ncm->skb_tx_data, dgram_pad);
+ memset(ntb_data, 0, dgram_pad);
+ ntb_data = (void *) skb_put(ncm->skb_tx_data, skb->len);
+ memcpy(ntb_data, skb->data, skb->len);
+ dev_kfree_skb_any(skb);
+ skb = NULL;
+
+ } else if (ncm->skb_tx_data && ncm->timer_force_tx) {
+ /* If the tx was requested because of a timeout then send */
+ skb2 = package_for_tx(ncm);
+ if (!skb2)
+ goto err;
+ }
+
+ return skb2;
+
+err:
+ ncm->netdev->stats.tx_dropped++;
+
+ if (skb)
+ dev_kfree_skb_any(skb);
+ if (ncm->skb_tx_data)
+ dev_kfree_skb_any(ncm->skb_tx_data);
+ if (ncm->skb_tx_ndp)
+ dev_kfree_skb_any(ncm->skb_tx_ndp);
+
+ return NULL;
+}
+
+/*
+ * This transmits the NTB if there are frames waiting.
+ */
+static void ncm_tx_tasklet(unsigned long data)
+{
+ struct f_ncm *ncm = (void *)data;
+
+ if (ncm->timer_stopping)
+ return;
+
+ /* Only send if data is available. */
+ if (ncm->skb_tx_data) {
+ ncm->timer_force_tx = true;
+ ncm->netdev->netdev_ops->ndo_start_xmit(NULL, ncm->netdev);
+ ncm->timer_force_tx = false;
+ }
+}
+
+/*
+ * The transmit should only be run if no skb data has been sent
+ * for a certain duration.
+ */
+static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data)
+{
+ struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer);
+ tasklet_schedule(&ncm->tx_tasklet);
+ return HRTIMER_NORESTART;
+}
+
+static int ncm_unwrap_ntb(struct gether *port,
+ struct sk_buff *skb,
+ struct sk_buff_head *list)
+{
+ struct f_ncm *ncm = func_to_ncm(&port->func);
+ __le16 *tmp = (void *) skb->data;
+ unsigned index, index2;
+ int ndp_index;
+ unsigned dg_len, dg_len2;
+ unsigned ndp_len;
+ struct sk_buff *skb2;
+ int ret = -EINVAL;
+ unsigned max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
+ const struct ndp_parser_opts *opts = ncm->parser_opts;
+ unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
+ int dgram_counter;
+
+ /* dwSignature */
+ if (get_unaligned_le32(tmp) != opts->nth_sign) {
+ INFO(port->func.config->cdev, "Wrong NTH SIGN, skblen %d\n",
+ skb->len);
+ print_hex_dump(KERN_INFO, "HEAD:", DUMP_PREFIX_ADDRESS, 32, 1,
+ skb->data, 32, false);
+
+ goto err;
+ }
+ tmp += 2;
+ /* wHeaderLength */
+ if (get_unaligned_le16(tmp++) != opts->nth_size) {
+ INFO(port->func.config->cdev, "Wrong NTB headersize\n");
+ goto err;
+ }
+ tmp++; /* skip wSequence */
+
+ /* (d)wBlockLength */
+ if (get_ncm(&tmp, opts->block_length) > max_size) {
+ INFO(port->func.config->cdev, "OUT size exceeded\n");
+ goto err;
+ }
+
+ ndp_index = get_ncm(&tmp, opts->ndp_index);
+
+ /* Run through all the NDP's in the NTB */
+ do {
+ /* NCM 3.2 */
+ if (((ndp_index % 4) != 0) &&
+ (ndp_index < opts->nth_size)) {
+ INFO(port->func.config->cdev, "Bad index: %#X\n",
+ ndp_index);
+ goto err;
+ }
+
+ /* walk through NDP */
+ tmp = (void *)(skb->data + ndp_index);
+ if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
+ INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
+ goto err;
+ }
+ tmp += 2;
+
+ ndp_len = get_unaligned_le16(tmp++);
+ /*
+ * NCM 3.3.1
+ * entry is 2 items
+ * item size is 16/32 bits, opts->dgram_item_len * 2 bytes
+ * minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry
+ * Each entry is a dgram index and a dgram length.
+ */
+ if ((ndp_len < opts->ndp_size
+ + 2 * 2 * (opts->dgram_item_len * 2))
+ || (ndp_len % opts->ndplen_align != 0)) {
+ INFO(port->func.config->cdev, "Bad NDP length: %#X\n",
+ ndp_len);
+ goto err;
+ }
+ tmp += opts->reserved1;
+ /* Check for another NDP (d)wNextNdpIndex */
+ ndp_index = get_ncm(&tmp, opts->next_ndp_index);
+ tmp += opts->reserved2;
+
+ ndp_len -= opts->ndp_size;
+ index2 = get_ncm(&tmp, opts->dgram_item_len);
+ dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
+ dgram_counter = 0;
+
+ do {
+ index = index2;
+ dg_len = dg_len2;
+ if (dg_len < 14 + crc_len) { /* ethernet hdr + crc */
+ INFO(port->func.config->cdev,
+ "Bad dgram length: %#X\n", dg_len);
+ goto err;
+ }
+ if (ncm->is_crc) {
+ uint32_t crc, crc2;
+
+ crc = get_unaligned_le32(skb->data +
+ index + dg_len -
+ crc_len);
+ crc2 = ~crc32_le(~0,
+ skb->data + index,
+ dg_len - crc_len);
+ if (crc != crc2) {
+ INFO(port->func.config->cdev,
+ "Bad CRC\n");
+ goto err;
+ }
+ }
+
+ index2 = get_ncm(&tmp, opts->dgram_item_len);
+ dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
+
+ /*
+ * Copy the data into a new skb.
+ * This ensures the truesize is correct
+ */
+ skb2 = netdev_alloc_skb_ip_align(ncm->netdev,
+ dg_len - crc_len);
+ if (skb2 == NULL)
+ goto err;
+ memcpy(skb_put(skb2, dg_len - crc_len),
+ skb->data + index, dg_len - crc_len);
+
+ skb_queue_tail(list, skb2);
+
+ ndp_len -= 2 * (opts->dgram_item_len * 2);
+
+ dgram_counter++;
+
+ if (index2 == 0 || dg_len2 == 0)
+ break;
+ } while (ndp_len > 2 * (opts->dgram_item_len * 2));
+ } while (ndp_index);
+
+ dev_kfree_skb_any(skb);
+
+ VDBG(port->func.config->cdev,
+ "Parsed NTB with %d frames\n", dgram_counter);
+ return 0;
+err:
+ skb_queue_purge(list);
+ dev_kfree_skb_any(skb);
+ return ret;
+}
+
+static void ncm_disable(struct usb_function *f)
+{
+ struct f_ncm *ncm = func_to_ncm(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "ncm deactivated\n");
+
+ if (ncm->port.in_ep->driver_data) {
+ ncm->timer_stopping = true;
+ ncm->netdev = NULL;
+ gether_disconnect(&ncm->port);
+ }
+
+ if (ncm->notify->driver_data) {
+ usb_ep_disable(ncm->notify);
+ ncm->notify->driver_data = NULL;
+ ncm->notify->desc = NULL;
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Callbacks let us notify the host about connect/disconnect when the
+ * net device is opened or closed.
+ *
+ * For testing, note that link states on this side include both opened
+ * and closed variants of:
+ *
+ * - disconnected/unconfigured
+ * - configured but inactive (data alt 0)
+ * - configured and active (data alt 1)
+ *
+ * Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and
+ * SET_INTERFACE (altsetting). Remember also that "configured" doesn't
+ * imply the host is actually polling the notification endpoint, and
+ * likewise that "active" doesn't imply it's actually using the data
+ * endpoints for traffic.
+ */
+
+static void ncm_open(struct gether *geth)
+{
+ struct f_ncm *ncm = func_to_ncm(&geth->func);
+
+ DBG(ncm->port.func.config->cdev, "%s\n", __func__);
+
+ spin_lock(&ncm->lock);
+ ncm->is_open = true;
+ ncm_notify(ncm);
+ spin_unlock(&ncm->lock);
+}
+
+static void ncm_close(struct gether *geth)
+{
+ struct f_ncm *ncm = func_to_ncm(&geth->func);
+
+ DBG(ncm->port.func.config->cdev, "%s\n", __func__);
+
+ spin_lock(&ncm->lock);
+ ncm->is_open = false;
+ ncm_notify(ncm);
+ spin_unlock(&ncm->lock);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* ethernet function driver setup/binding */
+
+static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_ncm *ncm = func_to_ncm(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+ struct f_ncm_opts *ncm_opts;
+
+ if (!can_support_ecm(cdev->gadget))
+ return -EINVAL;
+
+ ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to ncm_opts->bound access
+ */
+ if (!ncm_opts->bound) {
+ mutex_lock(&ncm_opts->lock);
+ gether_set_gadget(ncm_opts->net, cdev->gadget);
+ status = gether_register_netdev(ncm_opts->net);
+ mutex_unlock(&ncm_opts->lock);
+ if (status)
+ return status;
+ ncm_opts->bound = true;
+ }
+ us = usb_gstrings_attach(cdev, ncm_strings,
+ ARRAY_SIZE(ncm_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+ ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id;
+ ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id;
+ ncm_data_intf.iInterface = us[STRING_DATA_IDX].id;
+ ecm_desc.iMACAddress = us[STRING_MAC_IDX].id;
+ ncm_iad_desc.iFunction = us[STRING_IAD_IDX].id;
+
+ /* allocate instance-specific interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ncm->ctrl_id = status;
+ ncm_iad_desc.bFirstInterface = status;
+
+ ncm_control_intf.bInterfaceNumber = status;
+ ncm_union_desc.bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ncm->data_id = status;
+
+ ncm_data_nop_intf.bInterfaceNumber = status;
+ ncm_data_intf.bInterfaceNumber = status;
+ ncm_union_desc.bSlaveInterface0 = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_in_desc);
+ if (!ep)
+ goto fail;
+ ncm->port.in_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_out_desc);
+ if (!ep)
+ goto fail;
+ ncm->port.out_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_notify_desc);
+ if (!ep)
+ goto fail;
+ ncm->notify = ep;
+ ep->driver_data = cdev; /* claim */
+
+ status = -ENOMEM;
+
+ /* allocate notification request and buffer */
+ ncm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
+ if (!ncm->notify_req)
+ goto fail;
+ ncm->notify_req->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL);
+ if (!ncm->notify_req->buf)
+ goto fail;
+ ncm->notify_req->context = ncm;
+ ncm->notify_req->complete = ncm_notify_complete;
+
+ /*
+ * support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ hs_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
+ hs_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
+ hs_ncm_notify_desc.bEndpointAddress =
+ fs_ncm_notify_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function,
+ NULL);
+ /*
+ * NOTE: all that is done without knowing or caring about
+ * the network link ... which is unavailable to this code
+ * until we're activated via set_alt().
+ */
+
+ ncm->port.open = ncm_open;
+ ncm->port.close = ncm_close;
+
+ tasklet_init(&ncm->tx_tasklet, ncm_tx_tasklet, (unsigned long) ncm);
+ hrtimer_init(&ncm->task_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ ncm->task_timer.function = ncm_tx_timeout;
+
+ DBG(cdev, "CDC Network: %s speed IN/%s OUT/%s NOTIFY/%s\n",
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ ncm->port.in_ep->name, ncm->port.out_ep->name,
+ ncm->notify->name);
+ return 0;
+
+fail:
+ usb_free_all_descriptors(f);
+ if (ncm->notify_req) {
+ kfree(ncm->notify_req->buf);
+ usb_ep_free_request(ncm->notify, ncm->notify_req);
+ }
+
+ /* we might as well release our claims on endpoints */
+ if (ncm->notify)
+ ncm->notify->driver_data = NULL;
+ if (ncm->port.out_ep)
+ ncm->port.out_ep->driver_data = NULL;
+ if (ncm->port.in_ep)
+ ncm->port.in_ep->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+static inline struct f_ncm_opts *to_f_ncm_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_ncm_opts,
+ func_inst.group);
+}
+
+/* f_ncm_item_ops */
+USB_ETHERNET_CONFIGFS_ITEM(ncm);
+
+/* f_ncm_opts_dev_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ncm);
+
+/* f_ncm_opts_host_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ncm);
+
+/* f_ncm_opts_qmult */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ncm);
+
+/* f_ncm_opts_ifname */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ncm);
+
+static struct configfs_attribute *ncm_attrs[] = {
+ &f_ncm_opts_dev_addr.attr,
+ &f_ncm_opts_host_addr.attr,
+ &f_ncm_opts_qmult.attr,
+ &f_ncm_opts_ifname.attr,
+ NULL,
+};
+
+static struct config_item_type ncm_func_type = {
+ .ct_item_ops = &ncm_item_ops,
+ .ct_attrs = ncm_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void ncm_free_inst(struct usb_function_instance *f)
+{
+ struct f_ncm_opts *opts;
+
+ opts = container_of(f, struct f_ncm_opts, func_inst);
+ if (opts->bound)
+ gether_cleanup(netdev_priv(opts->net));
+ else
+ free_netdev(opts->net);
+ kfree(opts);
+}
+
+static struct usb_function_instance *ncm_alloc_inst(void)
+{
+ struct f_ncm_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&opts->lock);
+ opts->func_inst.free_func_inst = ncm_free_inst;
+ opts->net = gether_setup_default();
+ if (IS_ERR(opts->net)) {
+ struct net_device *net = opts->net;
+ kfree(opts);
+ return ERR_CAST(net);
+ }
+
+ config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type);
+
+ return &opts->func_inst;
+}
+
+static void ncm_free(struct usb_function *f)
+{
+ struct f_ncm *ncm;
+ struct f_ncm_opts *opts;
+
+ ncm = func_to_ncm(f);
+ opts = container_of(f->fi, struct f_ncm_opts, func_inst);
+ kfree(ncm);
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+}
+
+static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_ncm *ncm = func_to_ncm(f);
+
+ DBG(c->cdev, "ncm unbind\n");
+
+ hrtimer_cancel(&ncm->task_timer);
+ tasklet_kill(&ncm->tx_tasklet);
+
+ ncm_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+
+ kfree(ncm->notify_req->buf);
+ usb_ep_free_request(ncm->notify, ncm->notify_req);
+}
+
+static struct usb_function *ncm_alloc(struct usb_function_instance *fi)
+{
+ struct f_ncm *ncm;
+ struct f_ncm_opts *opts;
+ int status;
+
+ /* allocate and initialize one new instance */
+ ncm = kzalloc(sizeof(*ncm), GFP_KERNEL);
+ if (!ncm)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_ncm_opts, func_inst);
+ mutex_lock(&opts->lock);
+ opts->refcnt++;
+
+ /* export host's Ethernet address in CDC format */
+ status = gether_get_host_addr_cdc(opts->net, ncm->ethaddr,
+ sizeof(ncm->ethaddr));
+ if (status < 12) { /* strlen("01234567890a") */
+ kfree(ncm);
+ mutex_unlock(&opts->lock);
+ return ERR_PTR(-EINVAL);
+ }
+ ncm_string_defs[STRING_MAC_IDX].s = ncm->ethaddr;
+
+ spin_lock_init(&ncm->lock);
+ ncm_reset_values(ncm);
+ ncm->port.ioport = netdev_priv(opts->net);
+ mutex_unlock(&opts->lock);
+ ncm->port.is_fixed = true;
+ ncm->port.supports_multi_frame = true;
+
+ ncm->port.func.name = "cdc_network";
+ /* descriptors are per-instance copies */
+ ncm->port.func.bind = ncm_bind;
+ ncm->port.func.unbind = ncm_unbind;
+ ncm->port.func.set_alt = ncm_set_alt;
+ ncm->port.func.get_alt = ncm_get_alt;
+ ncm->port.func.setup = ncm_setup;
+ ncm->port.func.disable = ncm_disable;
+ ncm->port.func.free_func = ncm_free;
+
+ ncm->port.wrap = ncm_wrap_ntb;
+ ncm->port.unwrap = ncm_unwrap_ntb;
+
+ return &ncm->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yauheni Kaliuta");
--- /dev/null
+/*
+ * f_obex.c -- USB CDC OBEX function driver
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * Based on f_acm.c by Al Borchers and David Brownell.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+
+#include "u_serial.h"
+#include "gadget_chips.h"
+
+
+/*
+ * This CDC OBEX function support just packages a TTY-ish byte stream.
+ * A user mode server will put it into "raw" mode and handle all the
+ * relevant protocol details ... this is just a kernel passthrough.
+ * When possible, we prevent gadget enumeration until that server is
+ * ready to handle the commands.
+ */
+
+struct f_obex {
+ struct gserial port;
+ u8 ctrl_id;
+ u8 data_id;
+ u8 port_num;
+ u8 can_activate;
+};
+
+static inline struct f_obex *func_to_obex(struct usb_function *f)
+{
+ return container_of(f, struct f_obex, port.func);
+}
+
+static inline struct f_obex *port_to_obex(struct gserial *p)
+{
+ return container_of(p, struct f_obex, port);
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define OBEX_CTRL_IDX 0
+#define OBEX_DATA_IDX 1
+
+static struct usb_string obex_string_defs[] = {
+ [OBEX_CTRL_IDX].s = "CDC Object Exchange (OBEX)",
+ [OBEX_DATA_IDX].s = "CDC OBEX Data",
+ { }, /* end of list */
+};
+
+static struct usb_gadget_strings obex_string_table = {
+ .language = 0x0409, /* en-US */
+ .strings = obex_string_defs,
+};
+
+static struct usb_gadget_strings *obex_strings[] = {
+ &obex_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_interface_descriptor obex_control_intf = {
+ .bLength = sizeof(obex_control_intf),
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_OBEX,
+};
+
+static struct usb_interface_descriptor obex_data_nop_intf = {
+ .bLength = sizeof(obex_data_nop_intf),
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 1,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+};
+
+static struct usb_interface_descriptor obex_data_intf = {
+ .bLength = sizeof(obex_data_intf),
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 2,
+
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+};
+
+static struct usb_cdc_header_desc obex_cdc_header_desc = {
+ .bLength = sizeof(obex_cdc_header_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+ .bcdCDC = cpu_to_le16(0x0120),
+};
+
+static struct usb_cdc_union_desc obex_cdc_union_desc = {
+ .bLength = sizeof(obex_cdc_union_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+ .bMasterInterface0 = 1,
+ .bSlaveInterface0 = 2,
+};
+
+static struct usb_cdc_obex_desc obex_desc = {
+ .bLength = sizeof(obex_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_OBEX_TYPE,
+ .bcdVersion = cpu_to_le16(0x0100),
+};
+
+/* High-Speed Support */
+
+static struct usb_endpoint_descriptor obex_hs_ep_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor obex_hs_ep_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *hs_function[] = {
+ (struct usb_descriptor_header *) &obex_control_intf,
+ (struct usb_descriptor_header *) &obex_cdc_header_desc,
+ (struct usb_descriptor_header *) &obex_desc,
+ (struct usb_descriptor_header *) &obex_cdc_union_desc,
+
+ (struct usb_descriptor_header *) &obex_data_nop_intf,
+ (struct usb_descriptor_header *) &obex_data_intf,
+ (struct usb_descriptor_header *) &obex_hs_ep_in_desc,
+ (struct usb_descriptor_header *) &obex_hs_ep_out_desc,
+ NULL,
+};
+
+/* Full-Speed Support */
+
+static struct usb_endpoint_descriptor obex_fs_ep_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor obex_fs_ep_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *fs_function[] = {
+ (struct usb_descriptor_header *) &obex_control_intf,
+ (struct usb_descriptor_header *) &obex_cdc_header_desc,
+ (struct usb_descriptor_header *) &obex_desc,
+ (struct usb_descriptor_header *) &obex_cdc_union_desc,
+
+ (struct usb_descriptor_header *) &obex_data_nop_intf,
+ (struct usb_descriptor_header *) &obex_data_intf,
+ (struct usb_descriptor_header *) &obex_fs_ep_in_desc,
+ (struct usb_descriptor_header *) &obex_fs_ep_out_desc,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int obex_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_obex *obex = func_to_obex(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ if (intf == obex->ctrl_id) {
+ if (alt != 0)
+ goto fail;
+ /* NOP */
+ DBG(cdev, "reset obex ttyGS%d control\n", obex->port_num);
+
+ } else if (intf == obex->data_id) {
+ if (alt > 1)
+ goto fail;
+
+ if (obex->port.in->driver_data) {
+ DBG(cdev, "reset obex ttyGS%d\n", obex->port_num);
+ gserial_disconnect(&obex->port);
+ }
+
+ if (!obex->port.in->desc || !obex->port.out->desc) {
+ DBG(cdev, "init obex ttyGS%d\n", obex->port_num);
+ if (config_ep_by_speed(cdev->gadget, f,
+ obex->port.in) ||
+ config_ep_by_speed(cdev->gadget, f,
+ obex->port.out)) {
+ obex->port.out->desc = NULL;
+ obex->port.in->desc = NULL;
+ goto fail;
+ }
+ }
+
+ if (alt == 1) {
+ DBG(cdev, "activate obex ttyGS%d\n", obex->port_num);
+ gserial_connect(&obex->port, obex->port_num);
+ }
+
+ } else
+ goto fail;
+
+ return 0;
+
+fail:
+ return -EINVAL;
+}
+
+static int obex_get_alt(struct usb_function *f, unsigned intf)
+{
+ struct f_obex *obex = func_to_obex(f);
+
+ if (intf == obex->ctrl_id)
+ return 0;
+
+ return obex->port.in->driver_data ? 1 : 0;
+}
+
+static void obex_disable(struct usb_function *f)
+{
+ struct f_obex *obex = func_to_obex(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "obex ttyGS%d disable\n", obex->port_num);
+ gserial_disconnect(&obex->port);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void obex_connect(struct gserial *g)
+{
+ struct f_obex *obex = port_to_obex(g);
+ struct usb_composite_dev *cdev = g->func.config->cdev;
+ int status;
+
+ if (!obex->can_activate)
+ return;
+
+ status = usb_function_activate(&g->func);
+ if (status)
+ DBG(cdev, "obex ttyGS%d function activate --> %d\n",
+ obex->port_num, status);
+}
+
+static void obex_disconnect(struct gserial *g)
+{
+ struct f_obex *obex = port_to_obex(g);
+ struct usb_composite_dev *cdev = g->func.config->cdev;
+ int status;
+
+ if (!obex->can_activate)
+ return;
+
+ status = usb_function_deactivate(&g->func);
+ if (status)
+ DBG(cdev, "obex ttyGS%d function deactivate --> %d\n",
+ obex->port_num, status);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* Some controllers can't support CDC OBEX ... */
+static inline bool can_support_obex(struct usb_configuration *c)
+{
+ /* Since the first interface is a NOP, we can ignore the
+ * issue of multi-interface support on most controllers.
+ *
+ * Altsettings are mandatory, however...
+ */
+ if (!gadget_supports_altsettings(c->cdev->gadget))
+ return false;
+
+ /* everything else is *probably* fine ... */
+ return true;
+}
+
+static int obex_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_obex *obex = func_to_obex(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+
+ if (!can_support_obex(c))
+ return -EINVAL;
+
+ us = usb_gstrings_attach(cdev, obex_strings,
+ ARRAY_SIZE(obex_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+ obex_control_intf.iInterface = us[OBEX_CTRL_IDX].id;
+ obex_data_nop_intf.iInterface = us[OBEX_DATA_IDX].id;
+ obex_data_intf.iInterface = us[OBEX_DATA_IDX].id;
+
+ /* allocate instance-specific interface IDs, and patch descriptors */
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ obex->ctrl_id = status;
+
+ obex_control_intf.bInterfaceNumber = status;
+ obex_cdc_union_desc.bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ obex->data_id = status;
+
+ obex_data_nop_intf.bInterfaceNumber = status;
+ obex_data_intf.bInterfaceNumber = status;
+ obex_cdc_union_desc.bSlaveInterface0 = status;
+
+ /* allocate instance-specific endpoints */
+
+ status = -ENODEV;
+ ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_in_desc);
+ if (!ep)
+ goto fail;
+ obex->port.in = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_out_desc);
+ if (!ep)
+ goto fail;
+ obex->port.out = ep;
+ ep->driver_data = cdev; /* claim */
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+
+ obex_hs_ep_in_desc.bEndpointAddress =
+ obex_fs_ep_in_desc.bEndpointAddress;
+ obex_hs_ep_out_desc.bEndpointAddress =
+ obex_fs_ep_out_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, fs_function, hs_function, NULL);
+ if (status)
+ goto fail;
+
+ /* Avoid letting this gadget enumerate until the userspace
+ * OBEX server is active.
+ */
+ status = usb_function_deactivate(f);
+ if (status < 0)
+ WARNING(cdev, "obex ttyGS%d: can't prevent enumeration, %d\n",
+ obex->port_num, status);
+ else
+ obex->can_activate = true;
+
+
+ DBG(cdev, "obex ttyGS%d: %s speed IN/%s OUT/%s\n",
+ obex->port_num,
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ obex->port.in->name, obex->port.out->name);
+
+ return 0;
+
+fail:
+ usb_free_all_descriptors(f);
+ /* we might as well release our claims on endpoints */
+ if (obex->port.out)
+ obex->port.out->driver_data = NULL;
+ if (obex->port.in)
+ obex->port.in->driver_data = NULL;
+
+ ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
+
+ return status;
+}
+
+static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_serial_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(f_serial_opts);
+static ssize_t f_obex_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+ struct f_serial_opts_attribute *f_serial_opts_attr =
+ container_of(attr, struct f_serial_opts_attribute, attr);
+ ssize_t ret = 0;
+
+ if (f_serial_opts_attr->show)
+ ret = f_serial_opts_attr->show(opts, page);
+
+ return ret;
+}
+
+static void obex_attr_release(struct config_item *item)
+{
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations obex_item_ops = {
+ .release = obex_attr_release,
+ .show_attribute = f_obex_attr_show,
+};
+
+static ssize_t f_obex_port_num_show(struct f_serial_opts *opts, char *page)
+{
+ return sprintf(page, "%u\n", opts->port_num);
+}
+
+static struct f_serial_opts_attribute f_obex_port_num =
+ __CONFIGFS_ATTR_RO(port_num, f_obex_port_num_show);
+
+static struct configfs_attribute *acm_attrs[] = {
+ &f_obex_port_num.attr,
+ NULL,
+};
+
+static struct config_item_type obex_func_type = {
+ .ct_item_ops = &obex_item_ops,
+ .ct_attrs = acm_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void obex_free_inst(struct usb_function_instance *f)
+{
+ struct f_serial_opts *opts;
+
+ opts = container_of(f, struct f_serial_opts, func_inst);
+ gserial_free_line(opts->port_num);
+ kfree(opts);
+}
+
+static struct usb_function_instance *obex_alloc_inst(void)
+{
+ struct f_serial_opts *opts;
+ int ret;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.free_func_inst = obex_free_inst;
+ ret = gserial_alloc_line(&opts->port_num);
+ if (ret) {
+ kfree(opts);
+ return ERR_PTR(ret);
+ }
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &obex_func_type);
+
+ return &opts->func_inst;
+}
+
+static void obex_free(struct usb_function *f)
+{
+ struct f_obex *obex;
+
+ obex = func_to_obex(f);
+ kfree(obex);
+}
+
+static void obex_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ usb_free_all_descriptors(f);
+}
+
+static struct usb_function *obex_alloc(struct usb_function_instance *fi)
+{
+ struct f_obex *obex;
+ struct f_serial_opts *opts;
+
+ /* allocate and initialize one new instance */
+ obex = kzalloc(sizeof(*obex), GFP_KERNEL);
+ if (!obex)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+
+ obex->port_num = opts->port_num;
+
+ obex->port.connect = obex_connect;
+ obex->port.disconnect = obex_disconnect;
+
+ obex->port.func.name = "obex";
+ /* descriptors are per-instance copies */
+ obex->port.func.bind = obex_bind;
+ obex->port.func.unbind = obex_unbind;
+ obex->port.func.set_alt = obex_set_alt;
+ obex->port.func.get_alt = obex_get_alt;
+ obex->port.func.disable = obex_disable;
+ obex->port.func.free_func = obex_free;
+
+ return &obex->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(obex, obex_alloc_inst, obex_alloc);
+MODULE_AUTHOR("Felipe Balbi");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * f_phonet.c -- USB CDC Phonet function
+ *
+ * Copyright (C) 2007-2008 Nokia Corporation. All rights reserved.
+ *
+ * Author: Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+
+#include <linux/netdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_phonet.h>
+#include <linux/if_arp.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/cdc.h>
+#include <linux/usb/composite.h>
+
+#include "u_phonet.h"
+#include "u_ether.h"
+
+#define PN_MEDIA_USB 0x1B
+#define MAXPACKET 512
+#if (PAGE_SIZE % MAXPACKET)
+#error MAXPACKET must divide PAGE_SIZE!
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+struct phonet_port {
+ struct f_phonet *usb;
+ spinlock_t lock;
+};
+
+struct f_phonet {
+ struct usb_function function;
+ struct {
+ struct sk_buff *skb;
+ spinlock_t lock;
+ } rx;
+ struct net_device *dev;
+ struct usb_ep *in_ep, *out_ep;
+
+ struct usb_request *in_req;
+ struct usb_request *out_reqv[0];
+};
+
+static int phonet_rxq_size = 17;
+
+static inline struct f_phonet *func_to_pn(struct usb_function *f)
+{
+ return container_of(f, struct f_phonet, function);
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define USB_CDC_SUBCLASS_PHONET 0xfe
+#define USB_CDC_PHONET_TYPE 0xab
+
+static struct usb_interface_descriptor
+pn_control_intf_desc = {
+ .bLength = sizeof pn_control_intf_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC, */
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_PHONET,
+};
+
+static const struct usb_cdc_header_desc
+pn_header_desc = {
+ .bLength = sizeof pn_header_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+ .bcdCDC = cpu_to_le16(0x0110),
+};
+
+static const struct usb_cdc_header_desc
+pn_phonet_desc = {
+ .bLength = sizeof pn_phonet_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_PHONET_TYPE,
+ .bcdCDC = cpu_to_le16(0x1505), /* ??? */
+};
+
+static struct usb_cdc_union_desc
+pn_union_desc = {
+ .bLength = sizeof pn_union_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+
+ /* .bMasterInterface0 = DYNAMIC, */
+ /* .bSlaveInterface0 = DYNAMIC, */
+};
+
+static struct usb_interface_descriptor
+pn_data_nop_intf_desc = {
+ .bLength = sizeof pn_data_nop_intf_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC, */
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+};
+
+static struct usb_interface_descriptor
+pn_data_intf_desc = {
+ .bLength = sizeof pn_data_intf_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC, */
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+};
+
+static struct usb_endpoint_descriptor
+pn_fs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor
+pn_hs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(MAXPACKET),
+};
+
+static struct usb_endpoint_descriptor
+pn_fs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor
+pn_hs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *fs_pn_function[] = {
+ (struct usb_descriptor_header *) &pn_control_intf_desc,
+ (struct usb_descriptor_header *) &pn_header_desc,
+ (struct usb_descriptor_header *) &pn_phonet_desc,
+ (struct usb_descriptor_header *) &pn_union_desc,
+ (struct usb_descriptor_header *) &pn_data_nop_intf_desc,
+ (struct usb_descriptor_header *) &pn_data_intf_desc,
+ (struct usb_descriptor_header *) &pn_fs_sink_desc,
+ (struct usb_descriptor_header *) &pn_fs_source_desc,
+ NULL,
+};
+
+static struct usb_descriptor_header *hs_pn_function[] = {
+ (struct usb_descriptor_header *) &pn_control_intf_desc,
+ (struct usb_descriptor_header *) &pn_header_desc,
+ (struct usb_descriptor_header *) &pn_phonet_desc,
+ (struct usb_descriptor_header *) &pn_union_desc,
+ (struct usb_descriptor_header *) &pn_data_nop_intf_desc,
+ (struct usb_descriptor_header *) &pn_data_intf_desc,
+ (struct usb_descriptor_header *) &pn_hs_sink_desc,
+ (struct usb_descriptor_header *) &pn_hs_source_desc,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int pn_net_open(struct net_device *dev)
+{
+ netif_wake_queue(dev);
+ return 0;
+}
+
+static int pn_net_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_phonet *fp = ep->driver_data;
+ struct net_device *dev = fp->dev;
+ struct sk_buff *skb = req->context;
+
+ switch (req->status) {
+ case 0:
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ break;
+
+ case -ESHUTDOWN: /* disconnected */
+ case -ECONNRESET: /* disabled */
+ dev->stats.tx_aborted_errors++;
+ default:
+ dev->stats.tx_errors++;
+ }
+
+ dev_kfree_skb_any(skb);
+ netif_wake_queue(dev);
+}
+
+static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct phonet_port *port = netdev_priv(dev);
+ struct f_phonet *fp;
+ struct usb_request *req;
+ unsigned long flags;
+
+ if (skb->protocol != htons(ETH_P_PHONET))
+ goto out;
+
+ spin_lock_irqsave(&port->lock, flags);
+ fp = port->usb;
+ if (unlikely(!fp)) /* race with carrier loss */
+ goto out_unlock;
+
+ req = fp->in_req;
+ req->buf = skb->data;
+ req->length = skb->len;
+ req->complete = pn_tx_complete;
+ req->zero = 1;
+ req->context = skb;
+
+ if (unlikely(usb_ep_queue(fp->in_ep, req, GFP_ATOMIC)))
+ goto out_unlock;
+
+ netif_stop_queue(dev);
+ skb = NULL;
+
+out_unlock:
+ spin_unlock_irqrestore(&port->lock, flags);
+out:
+ if (unlikely(skb)) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ }
+ return NETDEV_TX_OK;
+}
+
+static int pn_net_mtu(struct net_device *dev, int new_mtu)
+{
+ if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static const struct net_device_ops pn_netdev_ops = {
+ .ndo_open = pn_net_open,
+ .ndo_stop = pn_net_close,
+ .ndo_start_xmit = pn_net_xmit,
+ .ndo_change_mtu = pn_net_mtu,
+};
+
+static void pn_net_setup(struct net_device *dev)
+{
+ dev->features = 0;
+ dev->type = ARPHRD_PHONET;
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+ dev->mtu = PHONET_DEV_MTU;
+ dev->hard_header_len = 1;
+ dev->dev_addr[0] = PN_MEDIA_USB;
+ dev->addr_len = 1;
+ dev->tx_queue_len = 1;
+
+ dev->netdev_ops = &pn_netdev_ops;
+ dev->destructor = free_netdev;
+ dev->header_ops = &phonet_header_ops;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Queue buffer for data from the host
+ */
+static int
+pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags)
+{
+ struct page *page;
+ int err;
+
+ page = __skb_alloc_page(gfp_flags | __GFP_NOMEMALLOC, NULL);
+ if (!page)
+ return -ENOMEM;
+
+ req->buf = page_address(page);
+ req->length = PAGE_SIZE;
+ req->context = page;
+
+ err = usb_ep_queue(fp->out_ep, req, gfp_flags);
+ if (unlikely(err))
+ put_page(page);
+ return err;
+}
+
+static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_phonet *fp = ep->driver_data;
+ struct net_device *dev = fp->dev;
+ struct page *page = req->context;
+ struct sk_buff *skb;
+ unsigned long flags;
+ int status = req->status;
+
+ switch (status) {
+ case 0:
+ spin_lock_irqsave(&fp->rx.lock, flags);
+ skb = fp->rx.skb;
+ if (!skb)
+ skb = fp->rx.skb = netdev_alloc_skb(dev, 12);
+ if (req->actual < req->length) /* Last fragment */
+ fp->rx.skb = NULL;
+ spin_unlock_irqrestore(&fp->rx.lock, flags);
+
+ if (unlikely(!skb))
+ break;
+
+ if (skb->len == 0) { /* First fragment */
+ skb->protocol = htons(ETH_P_PHONET);
+ skb_reset_mac_header(skb);
+ /* Can't use pskb_pull() on page in IRQ */
+ memcpy(skb_put(skb, 1), page_address(page), 1);
+ }
+
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
+ skb->len <= 1, req->actual, PAGE_SIZE);
+ page = NULL;
+
+ if (req->actual < req->length) { /* Last fragment */
+ skb->dev = dev;
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+
+ netif_rx(skb);
+ }
+ break;
+
+ /* Do not resubmit in these cases: */
+ case -ESHUTDOWN: /* disconnect */
+ case -ECONNABORTED: /* hw reset */
+ case -ECONNRESET: /* dequeued (unlink or netif down) */
+ req = NULL;
+ break;
+
+ /* Do resubmit in these cases: */
+ case -EOVERFLOW: /* request buffer overflow */
+ dev->stats.rx_over_errors++;
+ default:
+ dev->stats.rx_errors++;
+ break;
+ }
+
+ if (page)
+ put_page(page);
+ if (req)
+ pn_rx_submit(fp, req, GFP_ATOMIC | __GFP_COLD);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void __pn_reset(struct usb_function *f)
+{
+ struct f_phonet *fp = func_to_pn(f);
+ struct net_device *dev = fp->dev;
+ struct phonet_port *port = netdev_priv(dev);
+
+ netif_carrier_off(dev);
+ port->usb = NULL;
+
+ usb_ep_disable(fp->out_ep);
+ usb_ep_disable(fp->in_ep);
+ if (fp->rx.skb) {
+ dev_kfree_skb_irq(fp->rx.skb);
+ fp->rx.skb = NULL;
+ }
+}
+
+static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_phonet *fp = func_to_pn(f);
+ struct usb_gadget *gadget = fp->function.config->cdev->gadget;
+
+ if (intf == pn_control_intf_desc.bInterfaceNumber)
+ /* control interface, no altsetting */
+ return (alt > 0) ? -EINVAL : 0;
+
+ if (intf == pn_data_intf_desc.bInterfaceNumber) {
+ struct net_device *dev = fp->dev;
+ struct phonet_port *port = netdev_priv(dev);
+
+ /* data intf (0: inactive, 1: active) */
+ if (alt > 1)
+ return -EINVAL;
+
+ spin_lock(&port->lock);
+ __pn_reset(f);
+ if (alt == 1) {
+ int i;
+
+ if (config_ep_by_speed(gadget, f, fp->in_ep) ||
+ config_ep_by_speed(gadget, f, fp->out_ep)) {
+ fp->in_ep->desc = NULL;
+ fp->out_ep->desc = NULL;
+ spin_unlock(&port->lock);
+ return -EINVAL;
+ }
+ usb_ep_enable(fp->out_ep);
+ usb_ep_enable(fp->in_ep);
+
+ port->usb = fp;
+ fp->out_ep->driver_data = fp;
+ fp->in_ep->driver_data = fp;
+
+ netif_carrier_on(dev);
+ for (i = 0; i < phonet_rxq_size; i++)
+ pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC | __GFP_COLD);
+ }
+ spin_unlock(&port->lock);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int pn_get_alt(struct usb_function *f, unsigned intf)
+{
+ struct f_phonet *fp = func_to_pn(f);
+
+ if (intf == pn_control_intf_desc.bInterfaceNumber)
+ return 0;
+
+ if (intf == pn_data_intf_desc.bInterfaceNumber) {
+ struct phonet_port *port = netdev_priv(fp->dev);
+ u8 alt;
+
+ spin_lock(&port->lock);
+ alt = port->usb != NULL;
+ spin_unlock(&port->lock);
+ return alt;
+ }
+
+ return -EINVAL;
+}
+
+static void pn_disconnect(struct usb_function *f)
+{
+ struct f_phonet *fp = func_to_pn(f);
+ struct phonet_port *port = netdev_priv(fp->dev);
+ unsigned long flags;
+
+ /* remain disabled until set_alt */
+ spin_lock_irqsave(&port->lock, flags);
+ __pn_reset(f);
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int pn_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct usb_gadget *gadget = cdev->gadget;
+ struct f_phonet *fp = func_to_pn(f);
+ struct usb_ep *ep;
+ int status, i;
+
+ struct f_phonet_opts *phonet_opts;
+
+ phonet_opts = container_of(f->fi, struct f_phonet_opts, func_inst);
+
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to phonet_opts->bound access
+ */
+ if (!phonet_opts->bound) {
+ gphonet_set_gadget(phonet_opts->net, gadget);
+ status = gphonet_register_netdev(phonet_opts->net);
+ if (status)
+ return status;
+ phonet_opts->bound = true;
+ }
+
+ /* Reserve interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto err;
+ pn_control_intf_desc.bInterfaceNumber = status;
+ pn_union_desc.bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto err;
+ pn_data_nop_intf_desc.bInterfaceNumber = status;
+ pn_data_intf_desc.bInterfaceNumber = status;
+ pn_union_desc.bSlaveInterface0 = status;
+
+ /* Reserve endpoints */
+ status = -ENODEV;
+ ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc);
+ if (!ep)
+ goto err;
+ fp->out_ep = ep;
+ ep->driver_data = fp; /* Claim */
+
+ ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc);
+ if (!ep)
+ goto err;
+ fp->in_ep = ep;
+ ep->driver_data = fp; /* Claim */
+
+ pn_hs_sink_desc.bEndpointAddress = pn_fs_sink_desc.bEndpointAddress;
+ pn_hs_source_desc.bEndpointAddress = pn_fs_source_desc.bEndpointAddress;
+
+ /* Do not try to bind Phonet twice... */
+ status = usb_assign_descriptors(f, fs_pn_function, hs_pn_function,
+ NULL);
+ if (status)
+ goto err;
+
+ /* Incoming USB requests */
+ status = -ENOMEM;
+ for (i = 0; i < phonet_rxq_size; i++) {
+ struct usb_request *req;
+
+ req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL);
+ if (!req)
+ goto err_req;
+
+ req->complete = pn_rx_complete;
+ fp->out_reqv[i] = req;
+ }
+
+ /* Outgoing USB requests */
+ fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL);
+ if (!fp->in_req)
+ goto err_req;
+
+ INFO(cdev, "USB CDC Phonet function\n");
+ INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name,
+ fp->out_ep->name, fp->in_ep->name);
+ return 0;
+
+err_req:
+ for (i = 0; i < phonet_rxq_size && fp->out_reqv[i]; i++)
+ usb_ep_free_request(fp->out_ep, fp->out_reqv[i]);
+err:
+ usb_free_all_descriptors(f);
+ if (fp->out_ep)
+ fp->out_ep->driver_data = NULL;
+ if (fp->in_ep)
+ fp->in_ep->driver_data = NULL;
+ ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n");
+ return status;
+}
+
+static inline struct f_phonet_opts *to_f_phonet_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_phonet_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(f_phonet_opts);
+static ssize_t f_phonet_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct f_phonet_opts *opts = to_f_phonet_opts(item);
+ struct f_phonet_opts_attribute *f_phonet_opts_attr =
+ container_of(attr, struct f_phonet_opts_attribute, attr);
+ ssize_t ret = 0;
+
+ if (f_phonet_opts_attr->show)
+ ret = f_phonet_opts_attr->show(opts, page);
+ return ret;
+}
+
+static void phonet_attr_release(struct config_item *item)
+{
+ struct f_phonet_opts *opts = to_f_phonet_opts(item);
+
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations phonet_item_ops = {
+ .release = phonet_attr_release,
+ .show_attribute = f_phonet_attr_show,
+};
+
+static ssize_t f_phonet_ifname_show(struct f_phonet_opts *opts, char *page)
+{
+ return gether_get_ifname(opts->net, page, PAGE_SIZE);
+}
+
+static struct f_phonet_opts_attribute f_phonet_ifname =
+ __CONFIGFS_ATTR_RO(ifname, f_phonet_ifname_show);
+
+static struct configfs_attribute *phonet_attrs[] = {
+ &f_phonet_ifname.attr,
+ NULL,
+};
+
+static struct config_item_type phonet_func_type = {
+ .ct_item_ops = &phonet_item_ops,
+ .ct_attrs = phonet_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void phonet_free_inst(struct usb_function_instance *f)
+{
+ struct f_phonet_opts *opts;
+
+ opts = container_of(f, struct f_phonet_opts, func_inst);
+ if (opts->bound)
+ gphonet_cleanup(opts->net);
+ else
+ free_netdev(opts->net);
+ kfree(opts);
+}
+
+static struct usb_function_instance *phonet_alloc_inst(void)
+{
+ struct f_phonet_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.free_func_inst = phonet_free_inst;
+ opts->net = gphonet_setup_default();
+ if (IS_ERR(opts->net)) {
+ struct net_device *net = opts->net;
+ kfree(opts);
+ return ERR_CAST(net);
+ }
+
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &phonet_func_type);
+
+ return &opts->func_inst;
+}
+
+static void phonet_free(struct usb_function *f)
+{
+ struct f_phonet *phonet;
+
+ phonet = func_to_pn(f);
+ kfree(phonet);
+}
+
+static void pn_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_phonet *fp = func_to_pn(f);
+ int i;
+
+ /* We are already disconnected */
+ if (fp->in_req)
+ usb_ep_free_request(fp->in_ep, fp->in_req);
+ for (i = 0; i < phonet_rxq_size; i++)
+ if (fp->out_reqv[i])
+ usb_ep_free_request(fp->out_ep, fp->out_reqv[i]);
+
+ usb_free_all_descriptors(f);
+}
+
+static struct usb_function *phonet_alloc(struct usb_function_instance *fi)
+{
+ struct f_phonet *fp;
+ struct f_phonet_opts *opts;
+ int size;
+
+ size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *));
+ fp = kzalloc(size, GFP_KERNEL);
+ if (!fp)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_phonet_opts, func_inst);
+
+ fp->dev = opts->net;
+ fp->function.name = "phonet";
+ fp->function.bind = pn_bind;
+ fp->function.unbind = pn_unbind;
+ fp->function.set_alt = pn_set_alt;
+ fp->function.get_alt = pn_get_alt;
+ fp->function.disable = pn_disconnect;
+ fp->function.free_func = phonet_free;
+ spin_lock_init(&fp->rx.lock);
+
+ return &fp->function;
+}
+
+struct net_device *gphonet_setup_default(void)
+{
+ struct net_device *dev;
+ struct phonet_port *port;
+
+ /* Create net device */
+ dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ port = netdev_priv(dev);
+ spin_lock_init(&port->lock);
+ netif_carrier_off(dev);
+
+ return dev;
+}
+
+void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g)
+{
+ SET_NETDEV_DEV(net, &g->dev);
+}
+
+int gphonet_register_netdev(struct net_device *net)
+{
+ int status;
+
+ status = register_netdev(net);
+ if (status)
+ free_netdev(net);
+
+ return status;
+}
+
+void gphonet_cleanup(struct net_device *dev)
+{
+ unregister_netdev(dev);
+}
+
+DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc);
+MODULE_AUTHOR("Rémi Denis-Courmont");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * f_rndis.c -- RNDIS link function driver
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz (mina86@mina86.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+
+#include <linux/atomic.h>
+
+#include "u_ether.h"
+#include "u_ether_configfs.h"
+#include "u_rndis.h"
+#include "rndis.h"
+#include "configfs.h"
+
+/*
+ * This function is an RNDIS Ethernet port -- a Microsoft protocol that's
+ * been promoted instead of the standard CDC Ethernet. The published RNDIS
+ * spec is ambiguous, incomplete, and needlessly complex. Variants such as
+ * ActiveSync have even worse status in terms of specification.
+ *
+ * In short: it's a protocol controlled by (and for) Microsoft, not for an
+ * Open ecosystem or markets. Linux supports it *only* because Microsoft
+ * doesn't support the CDC Ethernet standard.
+ *
+ * The RNDIS data transfer model is complex, with multiple Ethernet packets
+ * per USB message, and out of band data. The control model is built around
+ * what's essentially an "RNDIS RPC" protocol. It's all wrapped in a CDC ACM
+ * (modem, not Ethernet) veneer, with those ACM descriptors being entirely
+ * useless (they're ignored). RNDIS expects to be the only function in its
+ * configuration, so it's no real help if you need composite devices; and
+ * it expects to be the first configuration too.
+ *
+ * There is a single technical advantage of RNDIS over CDC Ethernet, if you
+ * discount the fluff that its RPC can be made to deliver: it doesn't need
+ * a NOP altsetting for the data interface. That lets it work on some of the
+ * "so smart it's stupid" hardware which takes over configuration changes
+ * from the software, and adds restrictions like "no altsettings".
+ *
+ * Unfortunately MSFT's RNDIS drivers are buggy. They hang or oops, and
+ * have all sorts of contrary-to-specification oddities that can prevent
+ * them from working sanely. Since bugfixes (or accurate specs, letting
+ * Linux work around those bugs) are unlikely to ever come from MSFT, you
+ * may want to avoid using RNDIS on purely operational grounds.
+ *
+ * Omissions from the RNDIS 1.0 specification include:
+ *
+ * - Power management ... references data that's scattered around lots
+ * of other documentation, which is incorrect/incomplete there too.
+ *
+ * - There are various undocumented protocol requirements, like the need
+ * to send garbage in some control-OUT messages.
+ *
+ * - MS-Windows drivers sometimes emit undocumented requests.
+ */
+
+struct f_rndis {
+ struct gether port;
+ u8 ctrl_id, data_id;
+ u8 ethaddr[ETH_ALEN];
+ u32 vendorID;
+ const char *manufacturer;
+ int config;
+
+ struct usb_ep *notify;
+ struct usb_request *notify_req;
+ atomic_t notify_count;
+};
+
+static inline struct f_rndis *func_to_rndis(struct usb_function *f)
+{
+ return container_of(f, struct f_rndis, port.func);
+}
+
+/* peak (theoretical) bulk transfer rate in bits-per-second */
+static unsigned int bitrate(struct usb_gadget *g)
+{
+ if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
+ return 13 * 1024 * 8 * 1000 * 8;
+ else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+ return 13 * 512 * 8 * 1000 * 8;
+ else
+ return 19 * 64 * 1 * 1000 * 8;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ */
+
+#define RNDIS_STATUS_INTERVAL_MS 32
+#define STATUS_BYTECOUNT 8 /* 8 bytes data */
+
+
+/* interface descriptor: */
+
+static struct usb_interface_descriptor rndis_control_intf = {
+ .bLength = sizeof rndis_control_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC */
+ /* status endpoint is optional; this could be patched later */
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
+ .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_cdc_header_desc header_desc = {
+ .bLength = sizeof header_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+
+ .bcdCDC = cpu_to_le16(0x0110),
+};
+
+static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
+ .bLength = sizeof call_mgmt_descriptor,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
+
+ .bmCapabilities = 0x00,
+ .bDataInterface = 0x01,
+};
+
+static struct usb_cdc_acm_descriptor rndis_acm_descriptor = {
+ .bLength = sizeof rndis_acm_descriptor,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ACM_TYPE,
+
+ .bmCapabilities = 0x00,
+};
+
+static struct usb_cdc_union_desc rndis_union_desc = {
+ .bLength = sizeof(rndis_union_desc),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+ /* .bMasterInterface0 = DYNAMIC */
+ /* .bSlaveInterface0 = DYNAMIC */
+};
+
+/* the data interface has two bulk endpoints */
+
+static struct usb_interface_descriptor rndis_data_intf = {
+ .bLength = sizeof rndis_data_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ /* .iInterface = DYNAMIC */
+};
+
+
+static struct usb_interface_assoc_descriptor
+rndis_iad_descriptor = {
+ .bLength = sizeof rndis_iad_descriptor,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ .bFirstInterface = 0, /* XXX, hardcoded */
+ .bInterfaceCount = 2, // control + data
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
+ .bFunctionProtocol = USB_CDC_PROTO_NONE,
+ /* .iFunction = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
+ .bInterval = RNDIS_STATUS_INTERVAL_MS,
+};
+
+static struct usb_endpoint_descriptor fs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *eth_fs_function[] = {
+ (struct usb_descriptor_header *) &rndis_iad_descriptor,
+
+ /* control interface matches ACM, not Ethernet */
+ (struct usb_descriptor_header *) &rndis_control_intf,
+ (struct usb_descriptor_header *) &header_desc,
+ (struct usb_descriptor_header *) &call_mgmt_descriptor,
+ (struct usb_descriptor_header *) &rndis_acm_descriptor,
+ (struct usb_descriptor_header *) &rndis_union_desc,
+ (struct usb_descriptor_header *) &fs_notify_desc,
+
+ /* data interface has no altsetting */
+ (struct usb_descriptor_header *) &rndis_data_intf,
+ (struct usb_descriptor_header *) &fs_in_desc,
+ (struct usb_descriptor_header *) &fs_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
+ .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS)
+};
+
+static struct usb_endpoint_descriptor hs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *eth_hs_function[] = {
+ (struct usb_descriptor_header *) &rndis_iad_descriptor,
+
+ /* control interface matches ACM, not Ethernet */
+ (struct usb_descriptor_header *) &rndis_control_intf,
+ (struct usb_descriptor_header *) &header_desc,
+ (struct usb_descriptor_header *) &call_mgmt_descriptor,
+ (struct usb_descriptor_header *) &rndis_acm_descriptor,
+ (struct usb_descriptor_header *) &rndis_union_desc,
+ (struct usb_descriptor_header *) &hs_notify_desc,
+
+ /* data interface has no altsetting */
+ (struct usb_descriptor_header *) &rndis_data_intf,
+ (struct usb_descriptor_header *) &hs_in_desc,
+ (struct usb_descriptor_header *) &hs_out_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_notify_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
+ .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS)
+};
+
+static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = {
+ .bLength = sizeof ss_intr_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 3 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+ .wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT),
+};
+
+static struct usb_endpoint_descriptor ss_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor ss_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_bulk_comp_desc = {
+ .bLength = sizeof ss_bulk_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 2 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
+static struct usb_descriptor_header *eth_ss_function[] = {
+ (struct usb_descriptor_header *) &rndis_iad_descriptor,
+
+ /* control interface matches ACM, not Ethernet */
+ (struct usb_descriptor_header *) &rndis_control_intf,
+ (struct usb_descriptor_header *) &header_desc,
+ (struct usb_descriptor_header *) &call_mgmt_descriptor,
+ (struct usb_descriptor_header *) &rndis_acm_descriptor,
+ (struct usb_descriptor_header *) &rndis_union_desc,
+ (struct usb_descriptor_header *) &ss_notify_desc,
+ (struct usb_descriptor_header *) &ss_intr_comp_desc,
+
+ /* data interface has no altsetting */
+ (struct usb_descriptor_header *) &rndis_data_intf,
+ (struct usb_descriptor_header *) &ss_in_desc,
+ (struct usb_descriptor_header *) &ss_bulk_comp_desc,
+ (struct usb_descriptor_header *) &ss_out_desc,
+ (struct usb_descriptor_header *) &ss_bulk_comp_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+static struct usb_string rndis_string_defs[] = {
+ [0].s = "RNDIS Communications Control",
+ [1].s = "RNDIS Ethernet Data",
+ [2].s = "RNDIS",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings rndis_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = rndis_string_defs,
+};
+
+static struct usb_gadget_strings *rndis_strings[] = {
+ &rndis_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static struct sk_buff *rndis_add_header(struct gether *port,
+ struct sk_buff *skb)
+{
+ struct sk_buff *skb2;
+
+ skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
+ if (skb2)
+ rndis_add_hdr(skb2);
+
+ dev_kfree_skb(skb);
+ return skb2;
+}
+
+static void rndis_response_available(void *_rndis)
+{
+ struct f_rndis *rndis = _rndis;
+ struct usb_request *req = rndis->notify_req;
+ struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
+ __le32 *data = req->buf;
+ int status;
+
+ if (atomic_inc_return(&rndis->notify_count) != 1)
+ return;
+
+ /* Send RNDIS RESPONSE_AVAILABLE notification; a
+ * USB_CDC_NOTIFY_RESPONSE_AVAILABLE "should" work too
+ *
+ * This is the only notification defined by RNDIS.
+ */
+ data[0] = cpu_to_le32(1);
+ data[1] = cpu_to_le32(0);
+
+ status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
+ if (status) {
+ atomic_dec(&rndis->notify_count);
+ DBG(cdev, "notify/0 --> %d\n", status);
+ }
+}
+
+static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_rndis *rndis = req->context;
+ struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
+ int status = req->status;
+
+ /* after TX:
+ * - USB_CDC_GET_ENCAPSULATED_RESPONSE (ep0/control)
+ * - RNDIS_RESPONSE_AVAILABLE (status/irq)
+ */
+ switch (status) {
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ /* connection gone */
+ atomic_set(&rndis->notify_count, 0);
+ break;
+ default:
+ DBG(cdev, "RNDIS %s response error %d, %d/%d\n",
+ ep->name, status,
+ req->actual, req->length);
+ /* FALLTHROUGH */
+ case 0:
+ if (ep != rndis->notify)
+ break;
+
+ /* handle multiple pending RNDIS_RESPONSE_AVAILABLE
+ * notifications by resending until we're done
+ */
+ if (atomic_dec_and_test(&rndis->notify_count))
+ break;
+ status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
+ if (status) {
+ atomic_dec(&rndis->notify_count);
+ DBG(cdev, "notify/1 --> %d\n", status);
+ }
+ break;
+ }
+}
+
+static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_rndis *rndis = req->context;
+ int status;
+
+ /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
+// spin_lock(&dev->lock);
+ status = rndis_msg_parser(rndis->config, (u8 *) req->buf);
+ if (status < 0)
+ pr_err("RNDIS command error %d, %d/%d\n",
+ status, req->actual, req->length);
+// spin_unlock(&dev->lock);
+}
+
+static int
+rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct f_rndis *rndis = func_to_rndis(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ /* composite driver infrastructure handles everything except
+ * CDC class messages; interface activation uses set_alt().
+ */
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
+
+ /* RNDIS uses the CDC command encapsulation mechanism to implement
+ * an RPC scheme, with much getting/setting of attributes by OID.
+ */
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SEND_ENCAPSULATED_COMMAND:
+ if (w_value || w_index != rndis->ctrl_id)
+ goto invalid;
+ /* read the request; process it later */
+ value = w_length;
+ req->complete = rndis_command_complete;
+ req->context = rndis;
+ /* later, rndis_response_available() sends a notification */
+ break;
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_GET_ENCAPSULATED_RESPONSE:
+ if (w_value || w_index != rndis->ctrl_id)
+ goto invalid;
+ else {
+ u8 *buf;
+ u32 n;
+
+ /* return the result */
+ buf = rndis_get_next_response(rndis->config, &n);
+ if (buf) {
+ memcpy(req->buf, buf, n);
+ req->complete = rndis_response_complete;
+ req->context = rndis;
+ rndis_free_response(rndis->config, buf);
+ value = n;
+ }
+ /* else stalls ... spec says to avoid that */
+ }
+ break;
+
+ default:
+invalid:
+ VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ }
+
+ /* respond with data transfer or status phase? */
+ if (value >= 0) {
+ DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = (value < w_length);
+ req->length = value;
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0)
+ ERROR(cdev, "rndis response on err %d\n", value);
+ }
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+
+static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_rndis *rndis = func_to_rndis(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ /* we know alt == 0 */
+
+ if (intf == rndis->ctrl_id) {
+ if (rndis->notify->driver_data) {
+ VDBG(cdev, "reset rndis control %d\n", intf);
+ usb_ep_disable(rndis->notify);
+ }
+ if (!rndis->notify->desc) {
+ VDBG(cdev, "init rndis ctrl %d\n", intf);
+ if (config_ep_by_speed(cdev->gadget, f, rndis->notify))
+ goto fail;
+ }
+ usb_ep_enable(rndis->notify);
+ rndis->notify->driver_data = rndis;
+
+ } else if (intf == rndis->data_id) {
+ struct net_device *net;
+
+ if (rndis->port.in_ep->driver_data) {
+ DBG(cdev, "reset rndis\n");
+ gether_disconnect(&rndis->port);
+ }
+
+ if (!rndis->port.in_ep->desc || !rndis->port.out_ep->desc) {
+ DBG(cdev, "init rndis\n");
+ if (config_ep_by_speed(cdev->gadget, f,
+ rndis->port.in_ep) ||
+ config_ep_by_speed(cdev->gadget, f,
+ rndis->port.out_ep)) {
+ rndis->port.in_ep->desc = NULL;
+ rndis->port.out_ep->desc = NULL;
+ goto fail;
+ }
+ }
+
+ /* Avoid ZLPs; they can be troublesome. */
+ rndis->port.is_zlp_ok = false;
+
+ /* RNDIS should be in the "RNDIS uninitialized" state,
+ * either never activated or after rndis_uninit().
+ *
+ * We don't want data to flow here until a nonzero packet
+ * filter is set, at which point it enters "RNDIS data
+ * initialized" state ... but we do want the endpoints
+ * to be activated. It's a strange little state.
+ *
+ * REVISIT the RNDIS gadget code has done this wrong for a
+ * very long time. We need another call to the link layer
+ * code -- gether_updown(...bool) maybe -- to do it right.
+ */
+ rndis->port.cdc_filter = 0;
+
+ DBG(cdev, "RNDIS RX/TX early activation ... \n");
+ net = gether_connect(&rndis->port);
+ if (IS_ERR(net))
+ return PTR_ERR(net);
+
+ rndis_set_param_dev(rndis->config, net,
+ &rndis->port.cdc_filter);
+ } else
+ goto fail;
+
+ return 0;
+fail:
+ return -EINVAL;
+}
+
+static void rndis_disable(struct usb_function *f)
+{
+ struct f_rndis *rndis = func_to_rndis(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ if (!rndis->notify->driver_data)
+ return;
+
+ DBG(cdev, "rndis deactivated\n");
+
+ rndis_uninit(rndis->config);
+ gether_disconnect(&rndis->port);
+
+ usb_ep_disable(rndis->notify);
+ rndis->notify->driver_data = NULL;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * This isn't quite the same mechanism as CDC Ethernet, since the
+ * notification scheme passes less data, but the same set of link
+ * states must be tested. A key difference is that altsettings are
+ * not used to tell whether the link should send packets or not.
+ */
+
+static void rndis_open(struct gether *geth)
+{
+ struct f_rndis *rndis = func_to_rndis(&geth->func);
+ struct usb_composite_dev *cdev = geth->func.config->cdev;
+
+ DBG(cdev, "%s\n", __func__);
+
+ rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3,
+ bitrate(cdev->gadget) / 100);
+ rndis_signal_connect(rndis->config);
+}
+
+static void rndis_close(struct gether *geth)
+{
+ struct f_rndis *rndis = func_to_rndis(&geth->func);
+
+ DBG(geth->func.config->cdev, "%s\n", __func__);
+
+ rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
+ rndis_signal_disconnect(rndis->config);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* Some controllers can't support RNDIS ... */
+static inline bool can_support_rndis(struct usb_configuration *c)
+{
+ /* everything else is *presumably* fine */
+ return true;
+}
+
+/* ethernet function driver setup/binding */
+
+static int
+rndis_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_rndis *rndis = func_to_rndis(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+
+ struct f_rndis_opts *rndis_opts;
+
+ if (!can_support_rndis(c))
+ return -EINVAL;
+
+ rndis_opts = container_of(f->fi, struct f_rndis_opts, func_inst);
+
+ if (cdev->use_os_string) {
+ f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
+ GFP_KERNEL);
+ if (!f->os_desc_table)
+ return PTR_ERR(f->os_desc_table);
+ f->os_desc_n = 1;
+ f->os_desc_table[0].os_desc = &rndis_opts->rndis_os_desc;
+ }
+
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to rndis_opts->bound access
+ */
+ if (!rndis_opts->bound) {
+ gether_set_gadget(rndis_opts->net, cdev->gadget);
+ status = gether_register_netdev(rndis_opts->net);
+ if (status)
+ goto fail;
+ rndis_opts->bound = true;
+ }
+
+ us = usb_gstrings_attach(cdev, rndis_strings,
+ ARRAY_SIZE(rndis_string_defs));
+ if (IS_ERR(us)) {
+ status = PTR_ERR(us);
+ goto fail;
+ }
+ rndis_control_intf.iInterface = us[0].id;
+ rndis_data_intf.iInterface = us[1].id;
+ rndis_iad_descriptor.iFunction = us[2].id;
+
+ /* allocate instance-specific interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ rndis->ctrl_id = status;
+ rndis_iad_descriptor.bFirstInterface = status;
+
+ rndis_control_intf.bInterfaceNumber = status;
+ rndis_union_desc.bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ rndis->data_id = status;
+
+ rndis_data_intf.bInterfaceNumber = status;
+ rndis_union_desc.bSlaveInterface0 = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_in_desc);
+ if (!ep)
+ goto fail;
+ rndis->port.in_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_out_desc);
+ if (!ep)
+ goto fail;
+ rndis->port.out_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ /* NOTE: a status/notification endpoint is, strictly speaking,
+ * optional. We don't treat it that way though! It's simpler,
+ * and some newer profiles don't treat it as optional.
+ */
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_notify_desc);
+ if (!ep)
+ goto fail;
+ rndis->notify = ep;
+ ep->driver_data = cdev; /* claim */
+
+ status = -ENOMEM;
+
+ /* allocate notification request and buffer */
+ rndis->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
+ if (!rndis->notify_req)
+ goto fail;
+ rndis->notify_req->buf = kmalloc(STATUS_BYTECOUNT, GFP_KERNEL);
+ if (!rndis->notify_req->buf)
+ goto fail;
+ rndis->notify_req->length = STATUS_BYTECOUNT;
+ rndis->notify_req->context = rndis;
+ rndis->notify_req->complete = rndis_response_complete;
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ hs_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress;
+ hs_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress;
+ hs_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress;
+
+ ss_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress;
+ ss_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress;
+ ss_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, eth_fs_function, eth_hs_function,
+ eth_ss_function);
+ if (status)
+ goto fail;
+
+ rndis->port.open = rndis_open;
+ rndis->port.close = rndis_close;
+
+ rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
+ rndis_set_host_mac(rndis->config, rndis->ethaddr);
+
+ if (rndis->manufacturer && rndis->vendorID &&
+ rndis_set_param_vendor(rndis->config, rndis->vendorID,
+ rndis->manufacturer))
+ goto fail;
+
+ /* NOTE: all that is done without knowing or caring about
+ * the network link ... which is unavailable to this code
+ * until we're activated via set_alt().
+ */
+
+ DBG(cdev, "RNDIS: %s speed IN/%s OUT/%s NOTIFY/%s\n",
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ rndis->port.in_ep->name, rndis->port.out_ep->name,
+ rndis->notify->name);
+ return 0;
+
+fail:
+ kfree(f->os_desc_table);
+ f->os_desc_n = 0;
+ usb_free_all_descriptors(f);
+
+ if (rndis->notify_req) {
+ kfree(rndis->notify_req->buf);
+ usb_ep_free_request(rndis->notify, rndis->notify_req);
+ }
+
+ /* we might as well release our claims on endpoints */
+ if (rndis->notify)
+ rndis->notify->driver_data = NULL;
+ if (rndis->port.out_ep)
+ rndis->port.out_ep->driver_data = NULL;
+ if (rndis->port.in_ep)
+ rndis->port.in_ep->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net)
+{
+ struct f_rndis_opts *opts;
+
+ opts = container_of(f, struct f_rndis_opts, func_inst);
+ if (opts->bound)
+ gether_cleanup(netdev_priv(opts->net));
+ else
+ free_netdev(opts->net);
+ opts->borrowed_net = opts->bound = true;
+ opts->net = net;
+}
+EXPORT_SYMBOL_GPL(rndis_borrow_net);
+
+static inline struct f_rndis_opts *to_f_rndis_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_rndis_opts,
+ func_inst.group);
+}
+
+/* f_rndis_item_ops */
+USB_ETHERNET_CONFIGFS_ITEM(rndis);
+
+/* f_rndis_opts_dev_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(rndis);
+
+/* f_rndis_opts_host_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(rndis);
+
+/* f_rndis_opts_qmult */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(rndis);
+
+/* f_rndis_opts_ifname */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(rndis);
+
+static struct configfs_attribute *rndis_attrs[] = {
+ &f_rndis_opts_dev_addr.attr,
+ &f_rndis_opts_host_addr.attr,
+ &f_rndis_opts_qmult.attr,
+ &f_rndis_opts_ifname.attr,
+ NULL,
+};
+
+static struct config_item_type rndis_func_type = {
+ .ct_item_ops = &rndis_item_ops,
+ .ct_attrs = rndis_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void rndis_free_inst(struct usb_function_instance *f)
+{
+ struct f_rndis_opts *opts;
+
+ opts = container_of(f, struct f_rndis_opts, func_inst);
+ if (!opts->borrowed_net) {
+ if (opts->bound)
+ gether_cleanup(netdev_priv(opts->net));
+ else
+ free_netdev(opts->net);
+ }
+
+ kfree(opts->rndis_os_desc.group.default_groups); /* single VLA chunk */
+ kfree(opts);
+}
+
+static struct usb_function_instance *rndis_alloc_inst(void)
+{
+ struct f_rndis_opts *opts;
+ struct usb_os_desc *descs[1];
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ opts->rndis_os_desc.ext_compat_id = opts->rndis_ext_compat_id;
+
+ mutex_init(&opts->lock);
+ opts->func_inst.free_func_inst = rndis_free_inst;
+ opts->net = gether_setup_default();
+ if (IS_ERR(opts->net)) {
+ struct net_device *net = opts->net;
+ kfree(opts);
+ return ERR_CAST(net);
+ }
+ INIT_LIST_HEAD(&opts->rndis_os_desc.ext_prop);
+
+ descs[0] = &opts->rndis_os_desc;
+ usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
+ THIS_MODULE);
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &rndis_func_type);
+
+ return &opts->func_inst;
+}
+
+static void rndis_free(struct usb_function *f)
+{
+ struct f_rndis *rndis;
+ struct f_rndis_opts *opts;
+
+ rndis = func_to_rndis(f);
+ rndis_deregister(rndis->config);
+ opts = container_of(f->fi, struct f_rndis_opts, func_inst);
+ kfree(rndis);
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+}
+
+static void rndis_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_rndis *rndis = func_to_rndis(f);
+
+ kfree(f->os_desc_table);
+ f->os_desc_n = 0;
+ usb_free_all_descriptors(f);
+
+ kfree(rndis->notify_req->buf);
+ usb_ep_free_request(rndis->notify, rndis->notify_req);
+}
+
+static struct usb_function *rndis_alloc(struct usb_function_instance *fi)
+{
+ struct f_rndis *rndis;
+ struct f_rndis_opts *opts;
+ int status;
+
+ /* allocate and initialize one new instance */
+ rndis = kzalloc(sizeof(*rndis), GFP_KERNEL);
+ if (!rndis)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_rndis_opts, func_inst);
+ mutex_lock(&opts->lock);
+ opts->refcnt++;
+
+ gether_get_host_addr_u8(opts->net, rndis->ethaddr);
+ rndis->vendorID = opts->vendor_id;
+ rndis->manufacturer = opts->manufacturer;
+
+ rndis->port.ioport = netdev_priv(opts->net);
+ mutex_unlock(&opts->lock);
+ /* RNDIS activates when the host changes this filter */
+ rndis->port.cdc_filter = 0;
+
+ /* RNDIS has special (and complex) framing */
+ rndis->port.header_len = sizeof(struct rndis_packet_msg_type);
+ rndis->port.wrap = rndis_add_header;
+ rndis->port.unwrap = rndis_rm_hdr;
+
+ rndis->port.func.name = "rndis";
+ /* descriptors are per-instance copies */
+ rndis->port.func.bind = rndis_bind;
+ rndis->port.func.unbind = rndis_unbind;
+ rndis->port.func.set_alt = rndis_set_alt;
+ rndis->port.func.setup = rndis_setup;
+ rndis->port.func.disable = rndis_disable;
+ rndis->port.func.free_func = rndis_free;
+
+ status = rndis_register(rndis_response_available, rndis);
+ if (status < 0) {
+ kfree(rndis);
+ return ERR_PTR(status);
+ }
+ rndis->config = status;
+
+ return &rndis->port.func;
+}
+
+DECLARE_USB_FUNCTION(rndis, rndis_alloc_inst, rndis_alloc);
+
+static int __init rndis_mod_init(void)
+{
+ int ret;
+
+ ret = rndis_init();
+ if (ret)
+ return ret;
+
+ return usb_function_register(&rndisusb_func);
+}
+module_init(rndis_mod_init);
+
+static void __exit rndis_mod_exit(void)
+{
+ usb_function_unregister(&rndisusb_func);
+ rndis_exit();
+}
+module_exit(rndis_mod_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Brownell");
--- /dev/null
+/*
+ * f_serial.c - generic USB serial function driver
+ *
+ * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
+ * Copyright (C) 2008 by David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * either version 2 of that License or (at your option) any later version.
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+
+#include "u_serial.h"
+#include "gadget_chips.h"
+
+
+/*
+ * This function packages a simple "generic serial" port with no real
+ * control mechanisms, just raw data transfer over two bulk endpoints.
+ *
+ * Because it's not standardized, this isn't as interoperable as the
+ * CDC ACM driver. However, for many purposes it's just as functional
+ * if you can arrange appropriate host side drivers.
+ */
+
+struct f_gser {
+ struct gserial port;
+ u8 data_id;
+ u8 port_num;
+};
+
+static inline struct f_gser *func_to_gser(struct usb_function *f)
+{
+ return container_of(f, struct f_gser, port.func);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* interface descriptor: */
+
+static struct usb_interface_descriptor gser_interface_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ /* .bInterfaceNumber = DYNAMIC */
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor gser_fs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor gser_fs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *gser_fs_function[] = {
+ (struct usb_descriptor_header *) &gser_interface_desc,
+ (struct usb_descriptor_header *) &gser_fs_in_desc,
+ (struct usb_descriptor_header *) &gser_fs_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor gser_hs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor gser_hs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *gser_hs_function[] = {
+ (struct usb_descriptor_header *) &gser_interface_desc,
+ (struct usb_descriptor_header *) &gser_hs_in_desc,
+ (struct usb_descriptor_header *) &gser_hs_out_desc,
+ NULL,
+};
+
+static struct usb_endpoint_descriptor gser_ss_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor gser_ss_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor gser_ss_bulk_comp_desc = {
+ .bLength = sizeof gser_ss_bulk_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+};
+
+static struct usb_descriptor_header *gser_ss_function[] = {
+ (struct usb_descriptor_header *) &gser_interface_desc,
+ (struct usb_descriptor_header *) &gser_ss_in_desc,
+ (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
+ (struct usb_descriptor_header *) &gser_ss_out_desc,
+ (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+static struct usb_string gser_string_defs[] = {
+ [0].s = "Generic Serial",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings gser_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = gser_string_defs,
+};
+
+static struct usb_gadget_strings *gser_strings[] = {
+ &gser_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int gser_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_gser *gser = func_to_gser(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ /* we know alt == 0, so this is an activation or a reset */
+
+ if (gser->port.in->driver_data) {
+ DBG(cdev, "reset generic ttyGS%d\n", gser->port_num);
+ gserial_disconnect(&gser->port);
+ }
+ if (!gser->port.in->desc || !gser->port.out->desc) {
+ DBG(cdev, "activate generic ttyGS%d\n", gser->port_num);
+ if (config_ep_by_speed(cdev->gadget, f, gser->port.in) ||
+ config_ep_by_speed(cdev->gadget, f, gser->port.out)) {
+ gser->port.in->desc = NULL;
+ gser->port.out->desc = NULL;
+ return -EINVAL;
+ }
+ }
+ gserial_connect(&gser->port, gser->port_num);
+ return 0;
+}
+
+static void gser_disable(struct usb_function *f)
+{
+ struct f_gser *gser = func_to_gser(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "generic ttyGS%d deactivated\n", gser->port_num);
+ gserial_disconnect(&gser->port);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* serial function driver setup/binding */
+
+static int gser_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_gser *gser = func_to_gser(f);
+ int status;
+ struct usb_ep *ep;
+
+ /* REVISIT might want instance-specific strings to help
+ * distinguish instances ...
+ */
+
+ /* maybe allocate device-global string ID */
+ if (gser_string_defs[0].id == 0) {
+ status = usb_string_id(c->cdev);
+ if (status < 0)
+ return status;
+ gser_string_defs[0].id = status;
+ }
+
+ /* allocate instance-specific interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ gser->data_id = status;
+ gser_interface_desc.bInterfaceNumber = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &gser_fs_in_desc);
+ if (!ep)
+ goto fail;
+ gser->port.in = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &gser_fs_out_desc);
+ if (!ep)
+ goto fail;
+ gser->port.out = ep;
+ ep->driver_data = cdev; /* claim */
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ gser_hs_in_desc.bEndpointAddress = gser_fs_in_desc.bEndpointAddress;
+ gser_hs_out_desc.bEndpointAddress = gser_fs_out_desc.bEndpointAddress;
+
+ gser_ss_in_desc.bEndpointAddress = gser_fs_in_desc.bEndpointAddress;
+ gser_ss_out_desc.bEndpointAddress = gser_fs_out_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, gser_fs_function, gser_hs_function,
+ gser_ss_function);
+ if (status)
+ goto fail;
+ DBG(cdev, "generic ttyGS%d: %s speed IN/%s OUT/%s\n",
+ gser->port_num,
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ gser->port.in->name, gser->port.out->name);
+ return 0;
+
+fail:
+ /* we might as well release our claims on endpoints */
+ if (gser->port.out)
+ gser->port.out->driver_data = NULL;
+ if (gser->port.in)
+ gser->port.in->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_serial_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(f_serial_opts);
+static ssize_t f_serial_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+ struct f_serial_opts_attribute *f_serial_opts_attr =
+ container_of(attr, struct f_serial_opts_attribute, attr);
+ ssize_t ret = 0;
+
+ if (f_serial_opts_attr->show)
+ ret = f_serial_opts_attr->show(opts, page);
+
+ return ret;
+}
+
+static void serial_attr_release(struct config_item *item)
+{
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations serial_item_ops = {
+ .release = serial_attr_release,
+ .show_attribute = f_serial_attr_show,
+};
+
+static ssize_t f_serial_port_num_show(struct f_serial_opts *opts, char *page)
+{
+ return sprintf(page, "%u\n", opts->port_num);
+}
+
+static struct f_serial_opts_attribute f_serial_port_num =
+ __CONFIGFS_ATTR_RO(port_num, f_serial_port_num_show);
+
+static struct configfs_attribute *acm_attrs[] = {
+ &f_serial_port_num.attr,
+ NULL,
+};
+
+static struct config_item_type serial_func_type = {
+ .ct_item_ops = &serial_item_ops,
+ .ct_attrs = acm_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void gser_free_inst(struct usb_function_instance *f)
+{
+ struct f_serial_opts *opts;
+
+ opts = container_of(f, struct f_serial_opts, func_inst);
+ gserial_free_line(opts->port_num);
+ kfree(opts);
+}
+
+static struct usb_function_instance *gser_alloc_inst(void)
+{
+ struct f_serial_opts *opts;
+ int ret;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.free_func_inst = gser_free_inst;
+ ret = gserial_alloc_line(&opts->port_num);
+ if (ret) {
+ kfree(opts);
+ return ERR_PTR(ret);
+ }
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &serial_func_type);
+
+ return &opts->func_inst;
+}
+
+static void gser_free(struct usb_function *f)
+{
+ struct f_gser *serial;
+
+ serial = func_to_gser(f);
+ kfree(serial);
+}
+
+static void gser_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ usb_free_all_descriptors(f);
+}
+
+static struct usb_function *gser_alloc(struct usb_function_instance *fi)
+{
+ struct f_gser *gser;
+ struct f_serial_opts *opts;
+
+ /* allocate and initialize one new instance */
+ gser = kzalloc(sizeof(*gser), GFP_KERNEL);
+ if (!gser)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+
+ gser->port_num = opts->port_num;
+
+ gser->port.func.name = "gser";
+ gser->port.func.strings = gser_strings;
+ gser->port.func.bind = gser_bind;
+ gser->port.func.unbind = gser_unbind;
+ gser->port.func.set_alt = gser_set_alt;
+ gser->port.func.disable = gser_disable;
+ gser->port.func.free_func = gser_free;
+
+ return &gser->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(gser, gser_alloc_inst, gser_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Al Borchers");
+MODULE_AUTHOR("David Brownell");
--- /dev/null
+/*
+ * f_sourcesink.c - USB peripheral source/sink configuration driver
+ *
+ * Copyright (C) 2003-2008 David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/usb/composite.h>
+#include <linux/err.h>
+
+#include "g_zero.h"
+#include "gadget_chips.h"
+#include "u_f.h"
+
+/*
+ * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
+ * controller drivers.
+ *
+ * This just sinks bulk packets OUT to the peripheral and sources them IN
+ * to the host, optionally with specific data patterns for integrity tests.
+ * As such it supports basic functionality and load tests.
+ *
+ * In terms of control messaging, this supports all the standard requests
+ * plus two that support control-OUT tests. If the optional "autoresume"
+ * mode is enabled, it provides good functional coverage for the "USBCV"
+ * test harness from USB-IF.
+ *
+ * Note that because this doesn't queue more than one request at a time,
+ * some other function must be used to test queueing logic. The network
+ * link (g_ether) is the best overall option for that, since its TX and RX
+ * queues are relatively independent, will receive a range of packet sizes,
+ * and can often be made to run out completely. Those issues are important
+ * when stress testing peripheral controller drivers.
+ *
+ *
+ * This is currently packaged as a configuration driver, which can't be
+ * combined with other functions to make composite devices. However, it
+ * can be combined with other independent configurations.
+ */
+struct f_sourcesink {
+ struct usb_function function;
+
+ struct usb_ep *in_ep;
+ struct usb_ep *out_ep;
+ struct usb_ep *iso_in_ep;
+ struct usb_ep *iso_out_ep;
+ int cur_alt;
+};
+
+static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
+{
+ return container_of(f, struct f_sourcesink, function);
+}
+
+static unsigned pattern;
+static unsigned isoc_interval;
+static unsigned isoc_maxpacket;
+static unsigned isoc_mult;
+static unsigned isoc_maxburst;
+static unsigned buflen;
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_interface_descriptor source_sink_intf_alt0 = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_interface_descriptor source_sink_intf_alt1 = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 4,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_iso_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1023),
+ .bInterval = 4,
+};
+
+static struct usb_endpoint_descriptor fs_iso_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1023),
+ .bInterval = 4,
+};
+
+static struct usb_descriptor_header *fs_source_sink_descs[] = {
+ (struct usb_descriptor_header *) &source_sink_intf_alt0,
+ (struct usb_descriptor_header *) &fs_sink_desc,
+ (struct usb_descriptor_header *) &fs_source_desc,
+ (struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define FS_ALT_IFC_1_OFFSET 3
+ (struct usb_descriptor_header *) &fs_sink_desc,
+ (struct usb_descriptor_header *) &fs_source_desc,
+ (struct usb_descriptor_header *) &fs_iso_sink_desc,
+ (struct usb_descriptor_header *) &fs_iso_source_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_iso_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_endpoint_descriptor hs_iso_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_descriptor_header *hs_source_sink_descs[] = {
+ (struct usb_descriptor_header *) &source_sink_intf_alt0,
+ (struct usb_descriptor_header *) &hs_source_desc,
+ (struct usb_descriptor_header *) &hs_sink_desc,
+ (struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define HS_ALT_IFC_1_OFFSET 3
+ (struct usb_descriptor_header *) &hs_source_desc,
+ (struct usb_descriptor_header *) &hs_sink_desc,
+ (struct usb_descriptor_header *) &hs_iso_source_desc,
+ (struct usb_descriptor_header *) &hs_iso_sink_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = 0,
+};
+
+static struct usb_endpoint_descriptor ss_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = 0,
+};
+
+static struct usb_endpoint_descriptor ss_iso_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor ss_iso_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(1024),
+};
+
+static struct usb_descriptor_header *ss_source_sink_descs[] = {
+ (struct usb_descriptor_header *) &source_sink_intf_alt0,
+ (struct usb_descriptor_header *) &ss_source_desc,
+ (struct usb_descriptor_header *) &ss_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_sink_desc,
+ (struct usb_descriptor_header *) &ss_sink_comp_desc,
+ (struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define SS_ALT_IFC_1_OFFSET 5
+ (struct usb_descriptor_header *) &ss_source_desc,
+ (struct usb_descriptor_header *) &ss_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_sink_desc,
+ (struct usb_descriptor_header *) &ss_sink_comp_desc,
+ (struct usb_descriptor_header *) &ss_iso_source_desc,
+ (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_iso_sink_desc,
+ (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
+ NULL,
+};
+
+/* function-specific strings: */
+
+static struct usb_string strings_sourcesink[] = {
+ [0].s = "source and sink data",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_sourcesink = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_sourcesink,
+};
+
+static struct usb_gadget_strings *sourcesink_strings[] = {
+ &stringtab_sourcesink,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
+{
+ return alloc_ep_req(ep, len, buflen);
+}
+
+void free_ep_req(struct usb_ep *ep, struct usb_request *req)
+{
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
+{
+ int value;
+
+ if (ep->driver_data) {
+ value = usb_ep_disable(ep);
+ if (value < 0)
+ DBG(cdev, "disable %s --> %d\n",
+ ep->name, value);
+ ep->driver_data = NULL;
+ }
+}
+
+void disable_endpoints(struct usb_composite_dev *cdev,
+ struct usb_ep *in, struct usb_ep *out,
+ struct usb_ep *iso_in, struct usb_ep *iso_out)
+{
+ disable_ep(cdev, in);
+ disable_ep(cdev, out);
+ if (iso_in)
+ disable_ep(cdev, iso_in);
+ if (iso_out)
+ disable_ep(cdev, iso_out);
+}
+
+static int
+sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_sourcesink *ss = func_to_ss(f);
+ int id;
+ int ret;
+
+ /* allocate interface ID(s) */
+ id = usb_interface_id(c, f);
+ if (id < 0)
+ return id;
+ source_sink_intf_alt0.bInterfaceNumber = id;
+ source_sink_intf_alt1.bInterfaceNumber = id;
+
+ /* allocate bulk endpoints */
+ ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
+ if (!ss->in_ep) {
+autoconf_fail:
+ ERROR(cdev, "%s: can't autoconfigure on %s\n",
+ f->name, cdev->gadget->name);
+ return -ENODEV;
+ }
+ ss->in_ep->driver_data = cdev; /* claim */
+
+ ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
+ if (!ss->out_ep)
+ goto autoconf_fail;
+ ss->out_ep->driver_data = cdev; /* claim */
+
+ /* sanity check the isoc module parameters */
+ if (isoc_interval < 1)
+ isoc_interval = 1;
+ if (isoc_interval > 16)
+ isoc_interval = 16;
+ if (isoc_mult > 2)
+ isoc_mult = 2;
+ if (isoc_maxburst > 15)
+ isoc_maxburst = 15;
+
+ /* fill in the FS isoc descriptors from the module parameters */
+ fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
+ 1023 : isoc_maxpacket;
+ fs_iso_source_desc.bInterval = isoc_interval;
+ fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
+ 1023 : isoc_maxpacket;
+ fs_iso_sink_desc.bInterval = isoc_interval;
+
+ /* allocate iso endpoints */
+ ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
+ if (!ss->iso_in_ep)
+ goto no_iso;
+ ss->iso_in_ep->driver_data = cdev; /* claim */
+
+ ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
+ if (ss->iso_out_ep) {
+ ss->iso_out_ep->driver_data = cdev; /* claim */
+ } else {
+ ss->iso_in_ep->driver_data = NULL;
+ ss->iso_in_ep = NULL;
+no_iso:
+ /*
+ * We still want to work even if the UDC doesn't have isoc
+ * endpoints, so null out the alt interface that contains
+ * them and continue.
+ */
+ fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
+ hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
+ ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
+ }
+
+ if (isoc_maxpacket > 1024)
+ isoc_maxpacket = 1024;
+
+ /* support high speed hardware */
+ hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
+ hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
+
+ /*
+ * Fill in the HS isoc descriptors from the module parameters.
+ * We assume that the user knows what they are doing and won't
+ * give parameters that their UDC doesn't support.
+ */
+ hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
+ hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
+ hs_iso_source_desc.bInterval = isoc_interval;
+ hs_iso_source_desc.bEndpointAddress =
+ fs_iso_source_desc.bEndpointAddress;
+
+ hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
+ hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
+ hs_iso_sink_desc.bInterval = isoc_interval;
+ hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
+
+ /* support super speed hardware */
+ ss_source_desc.bEndpointAddress =
+ fs_source_desc.bEndpointAddress;
+ ss_sink_desc.bEndpointAddress =
+ fs_sink_desc.bEndpointAddress;
+
+ /*
+ * Fill in the SS isoc descriptors from the module parameters.
+ * We assume that the user knows what they are doing and won't
+ * give parameters that their UDC doesn't support.
+ */
+ ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
+ ss_iso_source_desc.bInterval = isoc_interval;
+ ss_iso_source_comp_desc.bmAttributes = isoc_mult;
+ ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
+ ss_iso_source_comp_desc.wBytesPerInterval =
+ isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
+ ss_iso_source_desc.bEndpointAddress =
+ fs_iso_source_desc.bEndpointAddress;
+
+ ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
+ ss_iso_sink_desc.bInterval = isoc_interval;
+ ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
+ ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
+ ss_iso_sink_comp_desc.wBytesPerInterval =
+ isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
+ ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
+
+ ret = usb_assign_descriptors(f, fs_source_sink_descs,
+ hs_source_sink_descs, ss_source_sink_descs);
+ if (ret)
+ return ret;
+
+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
+ (gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
+ f->name, ss->in_ep->name, ss->out_ep->name,
+ ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
+ ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
+ return 0;
+}
+
+static void
+sourcesink_free_func(struct usb_function *f)
+{
+ struct f_ss_opts *opts;
+
+ opts = container_of(f->fi, struct f_ss_opts, func_inst);
+
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+
+ usb_free_all_descriptors(f);
+ kfree(func_to_ss(f));
+}
+
+/* optionally require specific source/sink data patterns */
+static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
+{
+ unsigned i;
+ u8 *buf = req->buf;
+ struct usb_composite_dev *cdev = ss->function.config->cdev;
+
+ if (pattern == 2)
+ return 0;
+
+ for (i = 0; i < req->actual; i++, buf++) {
+ switch (pattern) {
+
+ /* all-zeroes has no synchronization issues */
+ case 0:
+ if (*buf == 0)
+ continue;
+ break;
+
+ /* "mod63" stays in sync with short-terminated transfers,
+ * OR otherwise when host and gadget agree on how large
+ * each usb transfer request should be. Resync is done
+ * with set_interface or set_config. (We *WANT* it to
+ * get quickly out of sync if controllers or their drivers
+ * stutter for any reason, including buffer duplication...)
+ */
+ case 1:
+ if (*buf == (u8)(i % 63))
+ continue;
+ break;
+ }
+ ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
+ usb_ep_set_halt(ss->out_ep);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
+{
+ unsigned i;
+ u8 *buf = req->buf;
+
+ switch (pattern) {
+ case 0:
+ memset(req->buf, 0, req->length);
+ break;
+ case 1:
+ for (i = 0; i < req->length; i++)
+ *buf++ = (u8) (i % 63);
+ break;
+ case 2:
+ break;
+ }
+}
+
+static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct usb_composite_dev *cdev;
+ struct f_sourcesink *ss = ep->driver_data;
+ int status = req->status;
+
+ /* driver_data will be null if ep has been disabled */
+ if (!ss)
+ return;
+
+ cdev = ss->function.config->cdev;
+
+ switch (status) {
+
+ case 0: /* normal completion? */
+ if (ep == ss->out_ep) {
+ check_read_data(ss, req);
+ if (pattern != 2)
+ memset(req->buf, 0x55, req->length);
+ }
+ break;
+
+ /* this endpoint is normally active while we're configured */
+ case -ECONNABORTED: /* hardware forced ep reset */
+ case -ECONNRESET: /* request dequeued */
+ case -ESHUTDOWN: /* disconnect from host */
+ VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
+ req->actual, req->length);
+ if (ep == ss->out_ep)
+ check_read_data(ss, req);
+ free_ep_req(ep, req);
+ return;
+
+ case -EOVERFLOW: /* buffer overrun on read means that
+ * we didn't provide a big enough
+ * buffer.
+ */
+ default:
+#if 1
+ DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
+ status, req->actual, req->length);
+#endif
+ case -EREMOTEIO: /* short read */
+ break;
+ }
+
+ status = usb_ep_queue(ep, req, GFP_ATOMIC);
+ if (status) {
+ ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
+ ep->name, req->length, status);
+ usb_ep_set_halt(ep);
+ /* FIXME recover later ... somehow */
+ }
+}
+
+static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
+ bool is_iso, int speed)
+{
+ struct usb_ep *ep;
+ struct usb_request *req;
+ int i, size, status;
+
+ for (i = 0; i < 8; i++) {
+ if (is_iso) {
+ switch (speed) {
+ case USB_SPEED_SUPER:
+ size = isoc_maxpacket * (isoc_mult + 1) *
+ (isoc_maxburst + 1);
+ break;
+ case USB_SPEED_HIGH:
+ size = isoc_maxpacket * (isoc_mult + 1);
+ break;
+ default:
+ size = isoc_maxpacket > 1023 ?
+ 1023 : isoc_maxpacket;
+ break;
+ }
+ ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
+ req = ss_alloc_ep_req(ep, size);
+ } else {
+ ep = is_in ? ss->in_ep : ss->out_ep;
+ req = ss_alloc_ep_req(ep, 0);
+ }
+
+ if (!req)
+ return -ENOMEM;
+
+ req->complete = source_sink_complete;
+ if (is_in)
+ reinit_write_data(ep, req);
+ else if (pattern != 2)
+ memset(req->buf, 0x55, req->length);
+
+ status = usb_ep_queue(ep, req, GFP_ATOMIC);
+ if (status) {
+ struct usb_composite_dev *cdev;
+
+ cdev = ss->function.config->cdev;
+ ERROR(cdev, "start %s%s %s --> %d\n",
+ is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
+ ep->name, status);
+ free_ep_req(ep, req);
+ }
+
+ if (!is_iso)
+ break;
+ }
+
+ return status;
+}
+
+static void disable_source_sink(struct f_sourcesink *ss)
+{
+ struct usb_composite_dev *cdev;
+
+ cdev = ss->function.config->cdev;
+ disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
+ ss->iso_out_ep);
+ VDBG(cdev, "%s disabled\n", ss->function.name);
+}
+
+static int
+enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
+ int alt)
+{
+ int result = 0;
+ int speed = cdev->gadget->speed;
+ struct usb_ep *ep;
+
+ /* one bulk endpoint writes (sources) zeroes IN (to the host) */
+ ep = ss->in_ep;
+ result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
+ if (result)
+ return result;
+ result = usb_ep_enable(ep);
+ if (result < 0)
+ return result;
+ ep->driver_data = ss;
+
+ result = source_sink_start_ep(ss, true, false, speed);
+ if (result < 0) {
+fail:
+ ep = ss->in_ep;
+ usb_ep_disable(ep);
+ ep->driver_data = NULL;
+ return result;
+ }
+
+ /* one bulk endpoint reads (sinks) anything OUT (from the host) */
+ ep = ss->out_ep;
+ result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
+ if (result)
+ goto fail;
+ result = usb_ep_enable(ep);
+ if (result < 0)
+ goto fail;
+ ep->driver_data = ss;
+
+ result = source_sink_start_ep(ss, false, false, speed);
+ if (result < 0) {
+fail2:
+ ep = ss->out_ep;
+ usb_ep_disable(ep);
+ ep->driver_data = NULL;
+ goto fail;
+ }
+
+ if (alt == 0)
+ goto out;
+
+ /* one iso endpoint writes (sources) zeroes IN (to the host) */
+ ep = ss->iso_in_ep;
+ if (ep) {
+ result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
+ if (result)
+ goto fail2;
+ result = usb_ep_enable(ep);
+ if (result < 0)
+ goto fail2;
+ ep->driver_data = ss;
+
+ result = source_sink_start_ep(ss, true, true, speed);
+ if (result < 0) {
+fail3:
+ ep = ss->iso_in_ep;
+ if (ep) {
+ usb_ep_disable(ep);
+ ep->driver_data = NULL;
+ }
+ goto fail2;
+ }
+ }
+
+ /* one iso endpoint reads (sinks) anything OUT (from the host) */
+ ep = ss->iso_out_ep;
+ if (ep) {
+ result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
+ if (result)
+ goto fail3;
+ result = usb_ep_enable(ep);
+ if (result < 0)
+ goto fail3;
+ ep->driver_data = ss;
+
+ result = source_sink_start_ep(ss, false, true, speed);
+ if (result < 0) {
+ usb_ep_disable(ep);
+ ep->driver_data = NULL;
+ goto fail3;
+ }
+ }
+out:
+ ss->cur_alt = alt;
+
+ DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
+ return result;
+}
+
+static int sourcesink_set_alt(struct usb_function *f,
+ unsigned intf, unsigned alt)
+{
+ struct f_sourcesink *ss = func_to_ss(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ if (ss->in_ep->driver_data)
+ disable_source_sink(ss);
+ return enable_source_sink(cdev, ss, alt);
+}
+
+static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
+{
+ struct f_sourcesink *ss = func_to_ss(f);
+
+ return ss->cur_alt;
+}
+
+static void sourcesink_disable(struct usb_function *f)
+{
+ struct f_sourcesink *ss = func_to_ss(f);
+
+ disable_source_sink(ss);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int sourcesink_setup(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct usb_configuration *c = f->config;
+ struct usb_request *req = c->cdev->req;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ req->length = USB_COMP_EP0_BUFSIZ;
+
+ /* composite driver infrastructure handles everything except
+ * the two control test requests.
+ */
+ switch (ctrl->bRequest) {
+
+ /*
+ * These are the same vendor-specific requests supported by
+ * Intel's USB 2.0 compliance test devices. We exceed that
+ * device spec by allowing multiple-packet requests.
+ *
+ * NOTE: the Control-OUT data stays in req->buf ... better
+ * would be copying it into a scratch buffer, so that other
+ * requests may safely intervene.
+ */
+ case 0x5b: /* control WRITE test -- fill the buffer */
+ if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
+ goto unknown;
+ if (w_value || w_index)
+ break;
+ /* just read that many bytes into the buffer */
+ if (w_length > req->length)
+ break;
+ value = w_length;
+ break;
+ case 0x5c: /* control READ test -- return the buffer */
+ if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
+ goto unknown;
+ if (w_value || w_index)
+ break;
+ /* expect those bytes are still in the buffer; send back */
+ if (w_length > req->length)
+ break;
+ value = w_length;
+ break;
+
+ default:
+unknown:
+ VDBG(c->cdev,
+ "unknown control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ }
+
+ /* respond with data transfer or status phase? */
+ if (value >= 0) {
+ VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = 0;
+ req->length = value;
+ value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0)
+ ERROR(c->cdev, "source/sink response, err %d\n",
+ value);
+ }
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+static struct usb_function *source_sink_alloc_func(
+ struct usb_function_instance *fi)
+{
+ struct f_sourcesink *ss;
+ struct f_ss_opts *ss_opts;
+
+ ss = kzalloc(sizeof(*ss), GFP_KERNEL);
+ if (!ss)
+ return NULL;
+
+ ss_opts = container_of(fi, struct f_ss_opts, func_inst);
+
+ mutex_lock(&ss_opts->lock);
+ ss_opts->refcnt++;
+ mutex_unlock(&ss_opts->lock);
+
+ pattern = ss_opts->pattern;
+ isoc_interval = ss_opts->isoc_interval;
+ isoc_maxpacket = ss_opts->isoc_maxpacket;
+ isoc_mult = ss_opts->isoc_mult;
+ isoc_maxburst = ss_opts->isoc_maxburst;
+ buflen = ss_opts->bulk_buflen;
+
+ ss->function.name = "source/sink";
+ ss->function.bind = sourcesink_bind;
+ ss->function.set_alt = sourcesink_set_alt;
+ ss->function.get_alt = sourcesink_get_alt;
+ ss->function.disable = sourcesink_disable;
+ ss->function.setup = sourcesink_setup;
+ ss->function.strings = sourcesink_strings;
+
+ ss->function.free_func = sourcesink_free_func;
+
+ return &ss->function;
+}
+
+static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_ss_opts,
+ func_inst.group);
+}
+
+CONFIGFS_ATTR_STRUCT(f_ss_opts);
+CONFIGFS_ATTR_OPS(f_ss_opts);
+
+static void ss_attr_release(struct config_item *item)
+{
+ struct f_ss_opts *ss_opts = to_f_ss_opts(item);
+
+ usb_put_function_instance(&ss_opts->func_inst);
+}
+
+static struct configfs_item_operations ss_item_ops = {
+ .release = ss_attr_release,
+ .show_attribute = f_ss_opts_attr_show,
+ .store_attribute = f_ss_opts_attr_store,
+};
+
+static ssize_t f_ss_opts_pattern_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->pattern);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_pattern_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u8 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou8(page, 0, &num);
+ if (ret)
+ goto end;
+
+ if (num != 0 && num != 1 && num != 2) {
+ ret = -EINVAL;
+ goto end;
+ }
+
+ opts->pattern = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_pattern =
+ __CONFIGFS_ATTR(pattern, S_IRUGO | S_IWUSR,
+ f_ss_opts_pattern_show,
+ f_ss_opts_pattern_store);
+
+static ssize_t f_ss_opts_isoc_interval_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->isoc_interval);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_interval_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u8 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou8(page, 0, &num);
+ if (ret)
+ goto end;
+
+ if (num > 16) {
+ ret = -EINVAL;
+ goto end;
+ }
+
+ opts->isoc_interval = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_interval =
+ __CONFIGFS_ATTR(isoc_interval, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_interval_show,
+ f_ss_opts_isoc_interval_store);
+
+static ssize_t f_ss_opts_isoc_maxpacket_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->isoc_maxpacket);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_maxpacket_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u16 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou16(page, 0, &num);
+ if (ret)
+ goto end;
+
+ if (num > 1024) {
+ ret = -EINVAL;
+ goto end;
+ }
+
+ opts->isoc_maxpacket = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_maxpacket =
+ __CONFIGFS_ATTR(isoc_maxpacket, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_maxpacket_show,
+ f_ss_opts_isoc_maxpacket_store);
+
+static ssize_t f_ss_opts_isoc_mult_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->isoc_mult);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_mult_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u8 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou8(page, 0, &num);
+ if (ret)
+ goto end;
+
+ if (num > 2) {
+ ret = -EINVAL;
+ goto end;
+ }
+
+ opts->isoc_mult = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_mult =
+ __CONFIGFS_ATTR(isoc_mult, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_mult_show,
+ f_ss_opts_isoc_mult_store);
+
+static ssize_t f_ss_opts_isoc_maxburst_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->isoc_maxburst);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_maxburst_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u8 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou8(page, 0, &num);
+ if (ret)
+ goto end;
+
+ if (num > 15) {
+ ret = -EINVAL;
+ goto end;
+ }
+
+ opts->isoc_maxburst = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_maxburst =
+ __CONFIGFS_ATTR(isoc_maxburst, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_maxburst_show,
+ f_ss_opts_isoc_maxburst_store);
+
+static ssize_t f_ss_opts_bulk_buflen_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%d", opts->bulk_buflen);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_bulk_buflen_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ int ret;
+ u32 num;
+
+ mutex_lock(&opts->lock);
+ if (opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = kstrtou32(page, 0, &num);
+ if (ret)
+ goto end;
+
+ opts->bulk_buflen = num;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ return ret;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_bulk_buflen =
+ __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
+ f_ss_opts_bulk_buflen_show,
+ f_ss_opts_bulk_buflen_store);
+
+static struct configfs_attribute *ss_attrs[] = {
+ &f_ss_opts_pattern.attr,
+ &f_ss_opts_isoc_interval.attr,
+ &f_ss_opts_isoc_maxpacket.attr,
+ &f_ss_opts_isoc_mult.attr,
+ &f_ss_opts_isoc_maxburst.attr,
+ &f_ss_opts_bulk_buflen.attr,
+ NULL,
+};
+
+static struct config_item_type ss_func_type = {
+ .ct_item_ops = &ss_item_ops,
+ .ct_attrs = ss_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void source_sink_free_instance(struct usb_function_instance *fi)
+{
+ struct f_ss_opts *ss_opts;
+
+ ss_opts = container_of(fi, struct f_ss_opts, func_inst);
+ kfree(ss_opts);
+}
+
+static struct usb_function_instance *source_sink_alloc_inst(void)
+{
+ struct f_ss_opts *ss_opts;
+
+ ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
+ if (!ss_opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&ss_opts->lock);
+ ss_opts->func_inst.free_func_inst = source_sink_free_instance;
+ ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
+ ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
+ ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
+
+ config_group_init_type_name(&ss_opts->func_inst.group, "",
+ &ss_func_type);
+
+ return &ss_opts->func_inst;
+}
+DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
+ source_sink_alloc_func);
+
+static int __init sslb_modinit(void)
+{
+ int ret;
+
+ ret = usb_function_register(&SourceSinkusb_func);
+ if (ret)
+ return ret;
+ ret = lb_modinit();
+ if (ret)
+ usb_function_unregister(&SourceSinkusb_func);
+ return ret;
+}
+static void __exit sslb_modexit(void)
+{
+ usb_function_unregister(&SourceSinkusb_func);
+ lb_modexit();
+}
+module_init(sslb_modinit);
+module_exit(sslb_modexit);
+
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * f_subset.c -- "CDC Subset" Ethernet link function driver
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+
+#include "u_ether.h"
+#include "u_ether_configfs.h"
+#include "u_gether.h"
+
+/*
+ * This function packages a simple "CDC Subset" Ethernet port with no real
+ * control mechanisms; just raw data transfer over two bulk endpoints.
+ * The data transfer model is exactly that of CDC Ethernet, which is
+ * why we call it the "CDC Subset".
+ *
+ * Because it's not standardized, this has some interoperability issues.
+ * They mostly relate to driver binding, since the data transfer model is
+ * so simple (CDC Ethernet). The original versions of this protocol used
+ * specific product/vendor IDs: byteswapped IDs for Digital Equipment's
+ * SA-1100 "Itsy" board, which could run Linux 2.4 kernels and supported
+ * daughtercards with USB peripheral connectors. (It was used more often
+ * with other boards, using the Itsy identifiers.) Linux hosts recognized
+ * this with CONFIG_USB_ARMLINUX; these devices have only one configuration
+ * and one interface.
+ *
+ * At some point, MCCI defined a (nonconformant) CDC MDLM variant called
+ * "SAFE", which happens to have a mode which is identical to the "CDC
+ * Subset" in terms of data transfer and lack of control model. This was
+ * adopted by later Sharp Zaurus models, and by some other software which
+ * Linux hosts recognize with CONFIG_USB_NET_ZAURUS.
+ *
+ * Because Microsoft's RNDIS drivers are far from robust, we added a few
+ * descriptors to the CDC Subset code, making this code look like a SAFE
+ * implementation. This lets you use MCCI's host side MS-Windows drivers
+ * if you get fed up with RNDIS. It also makes it easier for composite
+ * drivers to work, since they can use class based binding instead of
+ * caring about specific product and vendor IDs.
+ */
+
+struct f_gether {
+ struct gether port;
+
+ char ethaddr[14];
+};
+
+static inline struct f_gether *func_to_geth(struct usb_function *f)
+{
+ return container_of(f, struct f_gether, port.func);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * "Simple" CDC-subset option is a simple vendor-neutral model that most
+ * full speed controllers can handle: one interface, two bulk endpoints.
+ * To assist host side drivers, we fancy it up a bit, and add descriptors so
+ * some host side drivers will understand it as a "SAFE" variant.
+ *
+ * "SAFE" loosely follows CDC WMC MDLM, violating the spec in various ways.
+ * Data endpoints live in the control interface, there's no data interface.
+ * And it's not used to talk to a cell phone radio.
+ */
+
+/* interface descriptor: */
+
+static struct usb_interface_descriptor subset_data_intf = {
+ .bLength = sizeof subset_data_intf,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ /* .bInterfaceNumber = DYNAMIC */
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_COMM,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
+ .bInterfaceProtocol = 0,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_cdc_header_desc mdlm_header_desc = {
+ .bLength = sizeof mdlm_header_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,
+
+ .bcdCDC = cpu_to_le16(0x0110),
+};
+
+static struct usb_cdc_mdlm_desc mdlm_desc = {
+ .bLength = sizeof mdlm_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_MDLM_TYPE,
+
+ .bcdVersion = cpu_to_le16(0x0100),
+ .bGUID = {
+ 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
+ 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
+ },
+};
+
+/* since "usb_cdc_mdlm_detail_desc" is a variable length structure, we
+ * can't really use its struct. All we do here is say that we're using
+ * the submode of "SAFE" which directly matches the CDC Subset.
+ */
+static u8 mdlm_detail_desc[] = {
+ 6,
+ USB_DT_CS_INTERFACE,
+ USB_CDC_MDLM_DETAIL_TYPE,
+
+ 0, /* "SAFE" */
+ 0, /* network control capabilities (none) */
+ 0, /* network data capabilities ("raw" encapsulation) */
+};
+
+static struct usb_cdc_ether_desc ether_desc = {
+ .bLength = sizeof ether_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
+
+ /* this descriptor actually adds value, surprise! */
+ /* .iMACAddress = DYNAMIC */
+ .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
+ .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN),
+ .wNumberMCFilters = cpu_to_le16(0),
+ .bNumberPowerFilters = 0,
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_subset_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_subset_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *fs_eth_function[] = {
+ (struct usb_descriptor_header *) &subset_data_intf,
+ (struct usb_descriptor_header *) &mdlm_header_desc,
+ (struct usb_descriptor_header *) &mdlm_desc,
+ (struct usb_descriptor_header *) &mdlm_detail_desc,
+ (struct usb_descriptor_header *) ðer_desc,
+ (struct usb_descriptor_header *) &fs_subset_in_desc,
+ (struct usb_descriptor_header *) &fs_subset_out_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_subset_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_subset_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_descriptor_header *hs_eth_function[] = {
+ (struct usb_descriptor_header *) &subset_data_intf,
+ (struct usb_descriptor_header *) &mdlm_header_desc,
+ (struct usb_descriptor_header *) &mdlm_desc,
+ (struct usb_descriptor_header *) &mdlm_detail_desc,
+ (struct usb_descriptor_header *) ðer_desc,
+ (struct usb_descriptor_header *) &hs_subset_in_desc,
+ (struct usb_descriptor_header *) &hs_subset_out_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_subset_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor ss_subset_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_subset_bulk_comp_desc = {
+ .bLength = sizeof ss_subset_bulk_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 2 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
+static struct usb_descriptor_header *ss_eth_function[] = {
+ (struct usb_descriptor_header *) &subset_data_intf,
+ (struct usb_descriptor_header *) &mdlm_header_desc,
+ (struct usb_descriptor_header *) &mdlm_desc,
+ (struct usb_descriptor_header *) &mdlm_detail_desc,
+ (struct usb_descriptor_header *) ðer_desc,
+ (struct usb_descriptor_header *) &ss_subset_in_desc,
+ (struct usb_descriptor_header *) &ss_subset_bulk_comp_desc,
+ (struct usb_descriptor_header *) &ss_subset_out_desc,
+ (struct usb_descriptor_header *) &ss_subset_bulk_comp_desc,
+ NULL,
+};
+
+/* string descriptors: */
+
+static struct usb_string geth_string_defs[] = {
+ [0].s = "CDC Ethernet Subset/SAFE",
+ [1].s = "",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings geth_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = geth_string_defs,
+};
+
+static struct usb_gadget_strings *geth_strings[] = {
+ &geth_string_table,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int geth_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_gether *geth = func_to_geth(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct net_device *net;
+
+ /* we know alt == 0, so this is an activation or a reset */
+
+ if (geth->port.in_ep->driver_data) {
+ DBG(cdev, "reset cdc subset\n");
+ gether_disconnect(&geth->port);
+ }
+
+ DBG(cdev, "init + activate cdc subset\n");
+ if (config_ep_by_speed(cdev->gadget, f, geth->port.in_ep) ||
+ config_ep_by_speed(cdev->gadget, f, geth->port.out_ep)) {
+ geth->port.in_ep->desc = NULL;
+ geth->port.out_ep->desc = NULL;
+ return -EINVAL;
+ }
+
+ net = gether_connect(&geth->port);
+ return PTR_ERR_OR_ZERO(net);
+}
+
+static void geth_disable(struct usb_function *f)
+{
+ struct f_gether *geth = func_to_geth(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+
+ DBG(cdev, "net deactivated\n");
+ gether_disconnect(&geth->port);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* serial function driver setup/binding */
+
+static int
+geth_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_gether *geth = func_to_geth(f);
+ struct usb_string *us;
+ int status;
+ struct usb_ep *ep;
+
+ struct f_gether_opts *gether_opts;
+
+ gether_opts = container_of(f->fi, struct f_gether_opts, func_inst);
+
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to gether_opts->bound access
+ */
+ if (!gether_opts->bound) {
+ mutex_lock(&gether_opts->lock);
+ gether_set_gadget(gether_opts->net, cdev->gadget);
+ status = gether_register_netdev(gether_opts->net);
+ mutex_unlock(&gether_opts->lock);
+ if (status)
+ return status;
+ gether_opts->bound = true;
+ }
+
+ us = usb_gstrings_attach(cdev, geth_strings,
+ ARRAY_SIZE(geth_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+
+ subset_data_intf.iInterface = us[0].id;
+ ether_desc.iMACAddress = us[1].id;
+
+ /* allocate instance-specific interface IDs */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ subset_data_intf.bInterfaceNumber = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_subset_in_desc);
+ if (!ep)
+ goto fail;
+ geth->port.in_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ ep = usb_ep_autoconfig(cdev->gadget, &fs_subset_out_desc);
+ if (!ep)
+ goto fail;
+ geth->port.out_ep = ep;
+ ep->driver_data = cdev; /* claim */
+
+ /* support all relevant hardware speeds... we expect that when
+ * hardware is dual speed, all bulk-capable endpoints work at
+ * both speeds
+ */
+ hs_subset_in_desc.bEndpointAddress = fs_subset_in_desc.bEndpointAddress;
+ hs_subset_out_desc.bEndpointAddress =
+ fs_subset_out_desc.bEndpointAddress;
+
+ ss_subset_in_desc.bEndpointAddress = fs_subset_in_desc.bEndpointAddress;
+ ss_subset_out_desc.bEndpointAddress =
+ fs_subset_out_desc.bEndpointAddress;
+
+ status = usb_assign_descriptors(f, fs_eth_function, hs_eth_function,
+ ss_eth_function);
+ if (status)
+ goto fail;
+
+ /* NOTE: all that is done without knowing or caring about
+ * the network link ... which is unavailable to this code
+ * until we're activated via set_alt().
+ */
+
+ DBG(cdev, "CDC Subset: %s speed IN/%s OUT/%s\n",
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ geth->port.in_ep->name, geth->port.out_ep->name);
+ return 0;
+
+fail:
+ usb_free_all_descriptors(f);
+ /* we might as well release our claims on endpoints */
+ if (geth->port.out_ep)
+ geth->port.out_ep->driver_data = NULL;
+ if (geth->port.in_ep)
+ geth->port.in_ep->driver_data = NULL;
+
+ ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+
+ return status;
+}
+
+static inline struct f_gether_opts *to_f_gether_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_gether_opts,
+ func_inst.group);
+}
+
+/* f_gether_item_ops */
+USB_ETHERNET_CONFIGFS_ITEM(gether);
+
+/* f_gether_opts_dev_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(gether);
+
+/* f_gether_opts_host_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(gether);
+
+/* f_gether_opts_qmult */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(gether);
+
+/* f_gether_opts_ifname */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(gether);
+
+static struct configfs_attribute *gether_attrs[] = {
+ &f_gether_opts_dev_addr.attr,
+ &f_gether_opts_host_addr.attr,
+ &f_gether_opts_qmult.attr,
+ &f_gether_opts_ifname.attr,
+ NULL,
+};
+
+static struct config_item_type gether_func_type = {
+ .ct_item_ops = &gether_item_ops,
+ .ct_attrs = gether_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static void geth_free_inst(struct usb_function_instance *f)
+{
+ struct f_gether_opts *opts;
+
+ opts = container_of(f, struct f_gether_opts, func_inst);
+ if (opts->bound)
+ gether_cleanup(netdev_priv(opts->net));
+ else
+ free_netdev(opts->net);
+ kfree(opts);
+}
+
+static struct usb_function_instance *geth_alloc_inst(void)
+{
+ struct f_gether_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ mutex_init(&opts->lock);
+ opts->func_inst.free_func_inst = geth_free_inst;
+ opts->net = gether_setup_default();
+ if (IS_ERR(opts->net)) {
+ struct net_device *net = opts->net;
+ kfree(opts);
+ return ERR_CAST(net);
+ }
+
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &gether_func_type);
+
+ return &opts->func_inst;
+}
+
+static void geth_free(struct usb_function *f)
+{
+ struct f_gether *eth;
+
+ eth = func_to_geth(f);
+ kfree(eth);
+}
+
+static void geth_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ geth_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+}
+
+static struct usb_function *geth_alloc(struct usb_function_instance *fi)
+{
+ struct f_gether *geth;
+ struct f_gether_opts *opts;
+ int status;
+
+ /* allocate and initialize one new instance */
+ geth = kzalloc(sizeof(*geth), GFP_KERNEL);
+ if (!geth)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_gether_opts, func_inst);
+
+ mutex_lock(&opts->lock);
+ opts->refcnt++;
+ /* export host's Ethernet address in CDC format */
+ status = gether_get_host_addr_cdc(opts->net, geth->ethaddr,
+ sizeof(geth->ethaddr));
+ if (status < 12) {
+ kfree(geth);
+ mutex_unlock(&opts->lock);
+ return ERR_PTR(-EINVAL);
+ }
+ geth_string_defs[1].s = geth->ethaddr;
+
+ geth->port.ioport = netdev_priv(opts->net);
+ mutex_unlock(&opts->lock);
+ geth->port.cdc_filter = DEFAULT_FILTER;
+
+ geth->port.func.name = "cdc_subset";
+ geth->port.func.bind = geth_bind;
+ geth->port.func.unbind = geth_unbind;
+ geth->port.func.set_alt = geth_set_alt;
+ geth->port.func.disable = geth_disable;
+ geth->port.func.free_func = geth_free;
+
+ return &geth->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(geth, geth_alloc_inst, geth_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Brownell");
--- /dev/null
+/*
+ * f_audio.c -- USB Audio class function driver
+ *
+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
+ * Copyright (C) 2008 Analog Devices, Inc
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/atomic.h>
+
+#include "u_uac1.h"
+
+#define OUT_EP_MAX_PACKET_SIZE 200
+static int req_buf_size = OUT_EP_MAX_PACKET_SIZE;
+module_param(req_buf_size, int, S_IRUGO);
+MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size");
+
+static int req_count = 256;
+module_param(req_count, int, S_IRUGO);
+MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count");
+
+static int audio_buf_size = 48000;
+module_param(audio_buf_size, int, S_IRUGO);
+MODULE_PARM_DESC(audio_buf_size, "Audio buffer size");
+
+static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value);
+static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
+
+/*
+ * DESCRIPTORS ... most are static, but strings and full
+ * configuration descriptors are built on demand.
+ */
+
+/*
+ * We have two interfaces- AudioControl and AudioStreaming
+ * TODO: only supcard playback currently
+ */
+#define F_AUDIO_AC_INTERFACE 0
+#define F_AUDIO_AS_INTERFACE 1
+#define F_AUDIO_NUM_INTERFACES 2
+
+/* B.3.1 Standard AC Interface Descriptor */
+static struct usb_interface_descriptor ac_interface_desc __initdata = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
+};
+
+DECLARE_UAC_AC_HEADER_DESCRIPTOR(2);
+
+#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES)
+/* 1 input terminal, 1 output terminal and 1 feature unit */
+#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \
+ + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0))
+/* B.3.2 Class-Specific AC Interface Descriptor */
+static struct uac1_ac_header_descriptor_2 ac_header_desc = {
+ .bLength = UAC_DT_AC_HEADER_LENGTH,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_HEADER,
+ .bcdADC = __constant_cpu_to_le16(0x0100),
+ .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH),
+ .bInCollection = F_AUDIO_NUM_INTERFACES,
+ .baInterfaceNr = {
+ [0] = F_AUDIO_AC_INTERFACE,
+ [1] = F_AUDIO_AS_INTERFACE,
+ }
+};
+
+#define INPUT_TERMINAL_ID 1
+static struct uac_input_terminal_descriptor input_terminal_desc = {
+ .bLength = UAC_DT_INPUT_TERMINAL_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_INPUT_TERMINAL,
+ .bTerminalID = INPUT_TERMINAL_ID,
+ .wTerminalType = UAC_TERMINAL_STREAMING,
+ .bAssocTerminal = 0,
+ .wChannelConfig = 0x3,
+};
+
+DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0);
+
+#define FEATURE_UNIT_ID 2
+static struct uac_feature_unit_descriptor_0 feature_unit_desc = {
+ .bLength = UAC_DT_FEATURE_UNIT_SIZE(0),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_FEATURE_UNIT,
+ .bUnitID = FEATURE_UNIT_ID,
+ .bSourceID = INPUT_TERMINAL_ID,
+ .bControlSize = 2,
+ .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME),
+};
+
+static struct usb_audio_control mute_control = {
+ .list = LIST_HEAD_INIT(mute_control.list),
+ .name = "Mute Control",
+ .type = UAC_FU_MUTE,
+ /* Todo: add real Mute control code */
+ .set = generic_set_cmd,
+ .get = generic_get_cmd,
+};
+
+static struct usb_audio_control volume_control = {
+ .list = LIST_HEAD_INIT(volume_control.list),
+ .name = "Volume Control",
+ .type = UAC_FU_VOLUME,
+ /* Todo: add real Volume control code */
+ .set = generic_set_cmd,
+ .get = generic_get_cmd,
+};
+
+static struct usb_audio_control_selector feature_unit = {
+ .list = LIST_HEAD_INIT(feature_unit.list),
+ .id = FEATURE_UNIT_ID,
+ .name = "Mute & Volume Control",
+ .type = UAC_FEATURE_UNIT,
+ .desc = (struct usb_descriptor_header *)&feature_unit_desc,
+};
+
+#define OUTPUT_TERMINAL_ID 3
+static struct uac1_output_terminal_descriptor output_terminal_desc = {
+ .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
+ .bTerminalID = OUTPUT_TERMINAL_ID,
+ .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER,
+ .bAssocTerminal = FEATURE_UNIT_ID,
+ .bSourceID = FEATURE_UNIT_ID,
+};
+
+/* B.4.1 Standard AS Interface Descriptor */
+static struct usb_interface_descriptor as_interface_alt_0_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+};
+
+static struct usb_interface_descriptor as_interface_alt_1_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+};
+
+/* B.4.2 Class-Specific AS Interface Descriptor */
+static struct uac1_as_header_descriptor as_header_desc = {
+ .bLength = UAC_DT_AS_HEADER_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_AS_GENERAL,
+ .bTerminalLink = INPUT_TERMINAL_ID,
+ .bDelay = 1,
+ .wFormatTag = UAC_FORMAT_TYPE_I_PCM,
+};
+
+DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1);
+
+static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = {
+ .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_FORMAT_TYPE,
+ .bFormatType = UAC_FORMAT_TYPE_I,
+ .bSubframeSize = 2,
+ .bBitResolution = 16,
+ .bSamFreqType = 1,
+};
+
+/* Standard ISO OUT Endpoint Descriptor */
+static struct usb_endpoint_descriptor as_out_ep_desc = {
+ .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE
+ | USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = __constant_cpu_to_le16(OUT_EP_MAX_PACKET_SIZE),
+ .bInterval = 4,
+};
+
+/* Class-specific AS ISO OUT Endpoint Descriptor */
+static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = {
+ .bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+ .bDescriptorSubtype = UAC_EP_GENERAL,
+ .bmAttributes = 1,
+ .bLockDelayUnits = 1,
+ .wLockDelay = __constant_cpu_to_le16(1),
+};
+
+static struct usb_descriptor_header *f_audio_desc[] __initdata = {
+ (struct usb_descriptor_header *)&ac_interface_desc,
+ (struct usb_descriptor_header *)&ac_header_desc,
+
+ (struct usb_descriptor_header *)&input_terminal_desc,
+ (struct usb_descriptor_header *)&output_terminal_desc,
+ (struct usb_descriptor_header *)&feature_unit_desc,
+
+ (struct usb_descriptor_header *)&as_interface_alt_0_desc,
+ (struct usb_descriptor_header *)&as_interface_alt_1_desc,
+ (struct usb_descriptor_header *)&as_header_desc,
+
+ (struct usb_descriptor_header *)&as_type_i_desc,
+
+ (struct usb_descriptor_header *)&as_out_ep_desc,
+ (struct usb_descriptor_header *)&as_iso_out_desc,
+ NULL,
+};
+
+/*
+ * This function is an ALSA sound card following USB Audio Class Spec 1.0.
+ */
+
+/*-------------------------------------------------------------------------*/
+struct f_audio_buf {
+ u8 *buf;
+ int actual;
+ struct list_head list;
+};
+
+static struct f_audio_buf *f_audio_buffer_alloc(int buf_size)
+{
+ struct f_audio_buf *copy_buf;
+
+ copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC);
+ if (!copy_buf)
+ return ERR_PTR(-ENOMEM);
+
+ copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC);
+ if (!copy_buf->buf) {
+ kfree(copy_buf);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return copy_buf;
+}
+
+static void f_audio_buffer_free(struct f_audio_buf *audio_buf)
+{
+ kfree(audio_buf->buf);
+ kfree(audio_buf);
+}
+/*-------------------------------------------------------------------------*/
+
+struct f_audio {
+ struct gaudio card;
+
+ /* endpoints handle full and/or high speeds */
+ struct usb_ep *out_ep;
+
+ spinlock_t lock;
+ struct f_audio_buf *copy_buf;
+ struct work_struct playback_work;
+ struct list_head play_queue;
+
+ /* Control Set command */
+ struct list_head cs;
+ u8 set_cmd;
+ struct usb_audio_control *set_con;
+};
+
+static inline struct f_audio *func_to_audio(struct usb_function *f)
+{
+ return container_of(f, struct f_audio, card.func);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void f_audio_playback_work(struct work_struct *data)
+{
+ struct f_audio *audio = container_of(data, struct f_audio,
+ playback_work);
+ struct f_audio_buf *play_buf;
+
+ spin_lock_irq(&audio->lock);
+ if (list_empty(&audio->play_queue)) {
+ spin_unlock_irq(&audio->lock);
+ return;
+ }
+ play_buf = list_first_entry(&audio->play_queue,
+ struct f_audio_buf, list);
+ list_del(&play_buf->list);
+ spin_unlock_irq(&audio->lock);
+
+ u_audio_playback(&audio->card, play_buf->buf, play_buf->actual);
+ f_audio_buffer_free(play_buf);
+}
+
+static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_audio *audio = req->context;
+ struct usb_composite_dev *cdev = audio->card.func.config->cdev;
+ struct f_audio_buf *copy_buf = audio->copy_buf;
+ int err;
+
+ if (!copy_buf)
+ return -EINVAL;
+
+ /* Copy buffer is full, add it to the play_queue */
+ if (audio_buf_size - copy_buf->actual < req->actual) {
+ list_add_tail(©_buf->list, &audio->play_queue);
+ schedule_work(&audio->playback_work);
+ copy_buf = f_audio_buffer_alloc(audio_buf_size);
+ if (IS_ERR(copy_buf))
+ return -ENOMEM;
+ }
+
+ memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual);
+ copy_buf->actual += req->actual;
+ audio->copy_buf = copy_buf;
+
+ err = usb_ep_queue(ep, req, GFP_ATOMIC);
+ if (err)
+ ERROR(cdev, "%s queue req: %d\n", ep->name, err);
+
+ return 0;
+
+}
+
+static void f_audio_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_audio *audio = req->context;
+ int status = req->status;
+ u32 data = 0;
+ struct usb_ep *out_ep = audio->out_ep;
+
+ switch (status) {
+
+ case 0: /* normal completion? */
+ if (ep == out_ep)
+ f_audio_out_ep_complete(ep, req);
+ else if (audio->set_con) {
+ memcpy(&data, req->buf, req->length);
+ audio->set_con->set(audio->set_con, audio->set_cmd,
+ le16_to_cpu(data));
+ audio->set_con = NULL;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static int audio_set_intf_req(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct f_audio *audio = func_to_audio(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
+ u16 len = le16_to_cpu(ctrl->wLength);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u8 con_sel = (w_value >> 8) & 0xFF;
+ u8 cmd = (ctrl->bRequest & 0x0F);
+ struct usb_audio_control_selector *cs;
+ struct usb_audio_control *con;
+
+ DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
+ ctrl->bRequest, w_value, len, id);
+
+ list_for_each_entry(cs, &audio->cs, list) {
+ if (cs->id == id) {
+ list_for_each_entry(con, &cs->control, list) {
+ if (con->type == con_sel) {
+ audio->set_con = con;
+ break;
+ }
+ }
+ break;
+ }
+ }
+
+ audio->set_cmd = cmd;
+ req->context = audio;
+ req->complete = f_audio_complete;
+
+ return len;
+}
+
+static int audio_get_intf_req(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct f_audio *audio = func_to_audio(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int value = -EOPNOTSUPP;
+ u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
+ u16 len = le16_to_cpu(ctrl->wLength);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u8 con_sel = (w_value >> 8) & 0xFF;
+ u8 cmd = (ctrl->bRequest & 0x0F);
+ struct usb_audio_control_selector *cs;
+ struct usb_audio_control *con;
+
+ DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
+ ctrl->bRequest, w_value, len, id);
+
+ list_for_each_entry(cs, &audio->cs, list) {
+ if (cs->id == id) {
+ list_for_each_entry(con, &cs->control, list) {
+ if (con->type == con_sel && con->get) {
+ value = con->get(con, cmd);
+ break;
+ }
+ }
+ break;
+ }
+ }
+
+ req->context = audio;
+ req->complete = f_audio_complete;
+ len = min_t(size_t, sizeof(value), len);
+ memcpy(req->buf, &value, len);
+
+ return len;
+}
+
+static int audio_set_endpoint_req(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ int value = -EOPNOTSUPP;
+ u16 ep = le16_to_cpu(ctrl->wIndex);
+ u16 len = le16_to_cpu(ctrl->wLength);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+
+ DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
+ ctrl->bRequest, w_value, len, ep);
+
+ switch (ctrl->bRequest) {
+ case UAC_SET_CUR:
+ value = len;
+ break;
+
+ case UAC_SET_MIN:
+ break;
+
+ case UAC_SET_MAX:
+ break;
+
+ case UAC_SET_RES:
+ break;
+
+ case UAC_SET_MEM:
+ break;
+
+ default:
+ break;
+ }
+
+ return value;
+}
+
+static int audio_get_endpoint_req(struct usb_function *f,
+ const struct usb_ctrlrequest *ctrl)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ int value = -EOPNOTSUPP;
+ u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
+ u16 len = le16_to_cpu(ctrl->wLength);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+
+ DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
+ ctrl->bRequest, w_value, len, ep);
+
+ switch (ctrl->bRequest) {
+ case UAC_GET_CUR:
+ case UAC_GET_MIN:
+ case UAC_GET_MAX:
+ case UAC_GET_RES:
+ value = len;
+ break;
+ case UAC_GET_MEM:
+ break;
+ default:
+ break;
+ }
+
+ return value;
+}
+
+static int
+f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_request *req = cdev->req;
+ int value = -EOPNOTSUPP;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ /* composite driver infrastructure handles everything; interface
+ * activation uses set_alt().
+ */
+ switch (ctrl->bRequestType) {
+ case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
+ value = audio_set_intf_req(f, ctrl);
+ break;
+
+ case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
+ value = audio_get_intf_req(f, ctrl);
+ break;
+
+ case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
+ value = audio_set_endpoint_req(f, ctrl);
+ break;
+
+ case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
+ value = audio_get_endpoint_req(f, ctrl);
+ break;
+
+ default:
+ ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ }
+
+ /* respond with data transfer or status phase? */
+ if (value >= 0) {
+ DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = 0;
+ req->length = value;
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0)
+ ERROR(cdev, "audio response on err %d\n", value);
+ }
+
+ /* device either stalls (value < 0) or reports success */
+ return value;
+}
+
+static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_audio *audio = func_to_audio(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_ep *out_ep = audio->out_ep;
+ struct usb_request *req;
+ int i = 0, err = 0;
+
+ DBG(cdev, "intf %d, alt %d\n", intf, alt);
+
+ if (intf == 1) {
+ if (alt == 1) {
+ usb_ep_enable(out_ep);
+ out_ep->driver_data = audio;
+ audio->copy_buf = f_audio_buffer_alloc(audio_buf_size);
+ if (IS_ERR(audio->copy_buf))
+ return -ENOMEM;
+
+ /*
+ * allocate a bunch of read buffers
+ * and queue them all at once.
+ */
+ for (i = 0; i < req_count && err == 0; i++) {
+ req = usb_ep_alloc_request(out_ep, GFP_ATOMIC);
+ if (req) {
+ req->buf = kzalloc(req_buf_size,
+ GFP_ATOMIC);
+ if (req->buf) {
+ req->length = req_buf_size;
+ req->context = audio;
+ req->complete =
+ f_audio_complete;
+ err = usb_ep_queue(out_ep,
+ req, GFP_ATOMIC);
+ if (err)
+ ERROR(cdev,
+ "%s queue req: %d\n",
+ out_ep->name, err);
+ } else
+ err = -ENOMEM;
+ } else
+ err = -ENOMEM;
+ }
+
+ } else {
+ struct f_audio_buf *copy_buf = audio->copy_buf;
+ if (copy_buf) {
+ list_add_tail(©_buf->list,
+ &audio->play_queue);
+ schedule_work(&audio->playback_work);
+ }
+ }
+ }
+
+ return err;
+}
+
+static void f_audio_disable(struct usb_function *f)
+{
+ return;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void f_audio_build_desc(struct f_audio *audio)
+{
+ struct gaudio *card = &audio->card;
+ u8 *sam_freq;
+ int rate;
+
+ /* Set channel numbers */
+ input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card);
+ as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card);
+
+ /* Set sample rates */
+ rate = u_audio_get_playback_rate(card);
+ sam_freq = as_type_i_desc.tSamFreq[0];
+ memcpy(sam_freq, &rate, 3);
+
+ /* Todo: Set Sample bits and other parameters */
+
+ return;
+}
+
+/* audio function driver setup/binding */
+static int __init
+f_audio_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_audio *audio = func_to_audio(f);
+ int status;
+ struct usb_ep *ep = NULL;
+
+ f_audio_build_desc(audio);
+
+ /* allocate instance-specific interface IDs, and patch descriptors */
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ ac_interface_desc.bInterfaceNumber = status;
+
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ as_interface_alt_0_desc.bInterfaceNumber = status;
+ as_interface_alt_1_desc.bInterfaceNumber = status;
+
+ status = -ENODEV;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
+ if (!ep)
+ goto fail;
+ audio->out_ep = ep;
+ audio->out_ep->desc = &as_out_ep_desc;
+ ep->driver_data = cdev; /* claim */
+
+ status = -ENOMEM;
+
+ /* copy descriptors, and track endpoint copies */
+ status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL);
+ if (status)
+ goto fail;
+ return 0;
+
+fail:
+ if (ep)
+ ep->driver_data = NULL;
+ return status;
+}
+
+static void
+f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_audio *audio = func_to_audio(f);
+
+ usb_free_all_descriptors(f);
+ kfree(audio);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value)
+{
+ con->data[cmd] = value;
+
+ return 0;
+}
+
+static int generic_get_cmd(struct usb_audio_control *con, u8 cmd)
+{
+ return con->data[cmd];
+}
+
+/* Todo: add more control selecotor dynamically */
+static int __init control_selector_init(struct f_audio *audio)
+{
+ INIT_LIST_HEAD(&audio->cs);
+ list_add(&feature_unit.list, &audio->cs);
+
+ INIT_LIST_HEAD(&feature_unit.control);
+ list_add(&mute_control.list, &feature_unit.control);
+ list_add(&volume_control.list, &feature_unit.control);
+
+ volume_control.data[UAC__CUR] = 0xffc0;
+ volume_control.data[UAC__MIN] = 0xe3a0;
+ volume_control.data[UAC__MAX] = 0xfff0;
+ volume_control.data[UAC__RES] = 0x0030;
+
+ return 0;
+}
+
+/**
+ * audio_bind_config - add USB audio function to a configuration
+ * @c: the configuration to supcard the USB audio function
+ * Context: single threaded during gadget setup
+ *
+ * Returns zero on success, else negative errno.
+ */
+static int __init audio_bind_config(struct usb_configuration *c)
+{
+ struct f_audio *audio;
+ int status;
+
+ /* allocate and initialize one new instance */
+ audio = kzalloc(sizeof *audio, GFP_KERNEL);
+ if (!audio)
+ return -ENOMEM;
+
+ audio->card.func.name = "g_audio";
+ audio->card.gadget = c->cdev->gadget;
+
+ INIT_LIST_HEAD(&audio->play_queue);
+ spin_lock_init(&audio->lock);
+
+ /* set up ASLA audio devices */
+ status = gaudio_setup(&audio->card);
+ if (status < 0)
+ goto setup_fail;
+
+ audio->card.func.strings = audio_strings;
+ audio->card.func.bind = f_audio_bind;
+ audio->card.func.unbind = f_audio_unbind;
+ audio->card.func.set_alt = f_audio_set_alt;
+ audio->card.func.setup = f_audio_setup;
+ audio->card.func.disable = f_audio_disable;
+
+ control_selector_init(audio);
+
+ INIT_WORK(&audio->playback_work, f_audio_playback_work);
+
+ status = usb_add_function(c, &audio->card.func);
+ if (status)
+ goto add_fail;
+
+ INFO(c->cdev, "audio_buf_size %d, req_buf_size %d, req_count %d\n",
+ audio_buf_size, req_buf_size, req_count);
+
+ return status;
+
+add_fail:
+ gaudio_cleanup();
+setup_fail:
+ kfree(audio);
+ return status;
+}
--- /dev/null
+/*
+ * f_uac2.c -- USB Audio Class 2.0 Function
+ *
+ * Copyright (C) 2011
+ * Yadwinder Singh (yadi.brar01@gmail.com)
+ * Jaswinder Singh (jaswinder.singh@linaro.org)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/usb/audio.h>
+#include <linux/usb/audio-v2.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+/* Playback(USB-IN) Default Stereo - Fl/Fr */
+static int p_chmask = 0x3;
+module_param(p_chmask, uint, S_IRUGO);
+MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");
+
+/* Playback Default 48 KHz */
+static int p_srate = 48000;
+module_param(p_srate, uint, S_IRUGO);
+MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");
+
+/* Playback Default 16bits/sample */
+static int p_ssize = 2;
+module_param(p_ssize, uint, S_IRUGO);
+MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");
+
+/* Capture(USB-OUT) Default Stereo - Fl/Fr */
+static int c_chmask = 0x3;
+module_param(c_chmask, uint, S_IRUGO);
+MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");
+
+/* Capture Default 64 KHz */
+static int c_srate = 64000;
+module_param(c_srate, uint, S_IRUGO);
+MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");
+
+/* Capture Default 16bits/sample */
+static int c_ssize = 2;
+module_param(c_ssize, uint, S_IRUGO);
+MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
+
+/* Keep everyone on toes */
+#define USB_XFERS 2
+
+/*
+ * The driver implements a simple UAC_2 topology.
+ * USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
+ * ALSA_Playback -> IT_2 -> OT_4 -> USB-IN
+ * Capture and Playback sampling rates are independently
+ * controlled by two clock sources :
+ * CLK_5 := c_srate, and CLK_6 := p_srate
+ */
+#define USB_OUT_IT_ID 1
+#define IO_IN_IT_ID 2
+#define IO_OUT_OT_ID 3
+#define USB_IN_OT_ID 4
+#define USB_OUT_CLK_ID 5
+#define USB_IN_CLK_ID 6
+
+#define CONTROL_ABSENT 0
+#define CONTROL_RDONLY 1
+#define CONTROL_RDWR 3
+
+#define CLK_FREQ_CTRL 0
+#define CLK_VLD_CTRL 2
+
+#define COPY_CTRL 0
+#define CONN_CTRL 2
+#define OVRLD_CTRL 4
+#define CLSTR_CTRL 6
+#define UNFLW_CTRL 8
+#define OVFLW_CTRL 10
+
+const char *uac2_name = "snd_uac2";
+
+struct uac2_req {
+ struct uac2_rtd_params *pp; /* parent param */
+ struct usb_request *req;
+};
+
+struct uac2_rtd_params {
+ struct snd_uac2_chip *uac2; /* parent chip */
+ bool ep_enabled; /* if the ep is enabled */
+ /* Size of the ring buffer */
+ size_t dma_bytes;
+ unsigned char *dma_area;
+
+ struct snd_pcm_substream *ss;
+
+ /* Ring buffer */
+ ssize_t hw_ptr;
+
+ void *rbuf;
+
+ size_t period_size;
+
+ unsigned max_psize;
+ struct uac2_req ureq[USB_XFERS];
+
+ spinlock_t lock;
+};
+
+struct snd_uac2_chip {
+ struct platform_device pdev;
+ struct platform_driver pdrv;
+
+ struct uac2_rtd_params p_prm;
+ struct uac2_rtd_params c_prm;
+
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+};
+
+#define BUFF_SIZE_MAX (PAGE_SIZE * 16)
+#define PRD_SIZE_MAX PAGE_SIZE
+#define MIN_PERIODS 4
+
+static struct snd_pcm_hardware uac2_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER
+ | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .periods_max = BUFF_SIZE_MAX / PRD_SIZE_MAX,
+ .buffer_bytes_max = BUFF_SIZE_MAX,
+ .period_bytes_max = PRD_SIZE_MAX,
+ .periods_min = MIN_PERIODS,
+};
+
+struct audio_dev {
+ u8 ac_intf, ac_alt;
+ u8 as_out_intf, as_out_alt;
+ u8 as_in_intf, as_in_alt;
+
+ struct usb_ep *in_ep, *out_ep;
+ struct usb_function func;
+
+ /* The ALSA Sound Card it represents on the USB-Client side */
+ struct snd_uac2_chip uac2;
+};
+
+static struct audio_dev *agdev_g;
+
+static inline
+struct audio_dev *func_to_agdev(struct usb_function *f)
+{
+ return container_of(f, struct audio_dev, func);
+}
+
+static inline
+struct audio_dev *uac2_to_agdev(struct snd_uac2_chip *u)
+{
+ return container_of(u, struct audio_dev, uac2);
+}
+
+static inline
+struct snd_uac2_chip *pdev_to_uac2(struct platform_device *p)
+{
+ return container_of(p, struct snd_uac2_chip, pdev);
+}
+
+static inline
+uint num_channels(uint chanmask)
+{
+ uint num = 0;
+
+ while (chanmask) {
+ num += (chanmask & 1);
+ chanmask >>= 1;
+ }
+
+ return num;
+}
+
+static void
+agdev_iso_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ unsigned pending;
+ unsigned long flags;
+ bool update_alsa = false;
+ unsigned char *src, *dst;
+ int status = req->status;
+ struct uac2_req *ur = req->context;
+ struct snd_pcm_substream *substream;
+ struct uac2_rtd_params *prm = ur->pp;
+ struct snd_uac2_chip *uac2 = prm->uac2;
+
+ /* i/f shutting down */
+ if (!prm->ep_enabled || req->status == -ESHUTDOWN)
+ return;
+
+ /*
+ * We can't really do much about bad xfers.
+ * Afterall, the ISOCH xfers could fail legitimately.
+ */
+ if (status)
+ pr_debug("%s: iso_complete status(%d) %d/%d\n",
+ __func__, status, req->actual, req->length);
+
+ substream = prm->ss;
+
+ /* Do nothing if ALSA isn't active */
+ if (!substream)
+ goto exit;
+
+ spin_lock_irqsave(&prm->lock, flags);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ src = prm->dma_area + prm->hw_ptr;
+ req->actual = req->length;
+ dst = req->buf;
+ } else {
+ dst = prm->dma_area + prm->hw_ptr;
+ src = req->buf;
+ }
+
+ pending = prm->hw_ptr % prm->period_size;
+ pending += req->actual;
+ if (pending >= prm->period_size)
+ update_alsa = true;
+
+ prm->hw_ptr = (prm->hw_ptr + req->actual) % prm->dma_bytes;
+
+ spin_unlock_irqrestore(&prm->lock, flags);
+
+ /* Pack USB load in ALSA ring buffer */
+ memcpy(dst, src, req->actual);
+exit:
+ if (usb_ep_queue(ep, req, GFP_ATOMIC))
+ dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__);
+
+ if (update_alsa)
+ snd_pcm_period_elapsed(substream);
+
+ return;
+}
+
+static int
+uac2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
+ struct uac2_rtd_params *prm;
+ unsigned long flags;
+ int err = 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ prm = &uac2->p_prm;
+ else
+ prm = &uac2->c_prm;
+
+ spin_lock_irqsave(&prm->lock, flags);
+
+ /* Reset */
+ prm->hw_ptr = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ prm->ss = substream;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ prm->ss = NULL;
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ spin_unlock_irqrestore(&prm->lock, flags);
+
+ /* Clear buffer after Play stops */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !prm->ss)
+ memset(prm->rbuf, 0, prm->max_psize * USB_XFERS);
+
+ return err;
+}
+
+static snd_pcm_uframes_t uac2_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
+ struct uac2_rtd_params *prm;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ prm = &uac2->p_prm;
+ else
+ prm = &uac2->c_prm;
+
+ return bytes_to_frames(substream->runtime, prm->hw_ptr);
+}
+
+static int uac2_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
+ struct uac2_rtd_params *prm;
+ int err;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ prm = &uac2->p_prm;
+ else
+ prm = &uac2->c_prm;
+
+ err = snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+ if (err >= 0) {
+ prm->dma_bytes = substream->runtime->dma_bytes;
+ prm->dma_area = substream->runtime->dma_area;
+ prm->period_size = params_period_bytes(hw_params);
+ }
+
+ return err;
+}
+
+static int uac2_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
+ struct uac2_rtd_params *prm;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ prm = &uac2->p_prm;
+ else
+ prm = &uac2->c_prm;
+
+ prm->dma_area = NULL;
+ prm->dma_bytes = 0;
+ prm->period_size = 0;
+
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static int uac2_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->hw = uac2_pcm_hardware;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ spin_lock_init(&uac2->p_prm.lock);
+ runtime->hw.rate_min = p_srate;
+ runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; /* ! p_ssize ! */
+ runtime->hw.channels_min = num_channels(p_chmask);
+ runtime->hw.period_bytes_min = 2 * uac2->p_prm.max_psize
+ / runtime->hw.periods_min;
+ } else {
+ spin_lock_init(&uac2->c_prm.lock);
+ runtime->hw.rate_min = c_srate;
+ runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; /* ! c_ssize ! */
+ runtime->hw.channels_min = num_channels(c_chmask);
+ runtime->hw.period_bytes_min = 2 * uac2->c_prm.max_psize
+ / runtime->hw.periods_min;
+ }
+
+ runtime->hw.rate_max = runtime->hw.rate_min;
+ runtime->hw.channels_max = runtime->hw.channels_min;
+
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+
+ return 0;
+}
+
+/* ALSA cries without these function pointers */
+static int uac2_pcm_null(struct snd_pcm_substream *substream)
+{
+ return 0;
+}
+
+static struct snd_pcm_ops uac2_pcm_ops = {
+ .open = uac2_pcm_open,
+ .close = uac2_pcm_null,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = uac2_pcm_hw_params,
+ .hw_free = uac2_pcm_hw_free,
+ .trigger = uac2_pcm_trigger,
+ .pointer = uac2_pcm_pointer,
+ .prepare = uac2_pcm_null,
+};
+
+static int snd_uac2_probe(struct platform_device *pdev)
+{
+ struct snd_uac2_chip *uac2 = pdev_to_uac2(pdev);
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ int err;
+
+ /* Choose any slot, with no id */
+ err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card);
+ if (err < 0)
+ return err;
+
+ uac2->card = card;
+
+ /*
+ * Create first PCM device
+ * Create a substream only for non-zero channel streams
+ */
+ err = snd_pcm_new(uac2->card, "UAC2 PCM", 0,
+ p_chmask ? 1 : 0, c_chmask ? 1 : 0, &pcm);
+ if (err < 0)
+ goto snd_fail;
+
+ strcpy(pcm->name, "UAC2 PCM");
+ pcm->private_data = uac2;
+
+ uac2->pcm = pcm;
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac2_pcm_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac2_pcm_ops);
+
+ strcpy(card->driver, "UAC2_Gadget");
+ strcpy(card->shortname, "UAC2_Gadget");
+ sprintf(card->longname, "UAC2_Gadget %i", pdev->id);
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL), 0, BUFF_SIZE_MAX);
+
+ err = snd_card_register(card);
+ if (!err) {
+ platform_set_drvdata(pdev, card);
+ return 0;
+ }
+
+snd_fail:
+ snd_card_free(card);
+
+ uac2->pcm = NULL;
+ uac2->card = NULL;
+
+ return err;
+}
+
+static int snd_uac2_remove(struct platform_device *pdev)
+{
+ struct snd_card *card = platform_get_drvdata(pdev);
+
+ if (card)
+ return snd_card_free(card);
+
+ return 0;
+}
+
+static int alsa_uac2_init(struct audio_dev *agdev)
+{
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ int err;
+
+ uac2->pdrv.probe = snd_uac2_probe;
+ uac2->pdrv.remove = snd_uac2_remove;
+ uac2->pdrv.driver.name = uac2_name;
+
+ uac2->pdev.id = 0;
+ uac2->pdev.name = uac2_name;
+
+ /* Register snd_uac2 driver */
+ err = platform_driver_register(&uac2->pdrv);
+ if (err)
+ return err;
+
+ /* Register snd_uac2 device */
+ err = platform_device_register(&uac2->pdev);
+ if (err)
+ platform_driver_unregister(&uac2->pdrv);
+
+ return err;
+}
+
+static void alsa_uac2_exit(struct audio_dev *agdev)
+{
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+
+ platform_driver_unregister(&uac2->pdrv);
+ platform_device_unregister(&uac2->pdev);
+}
+
+
+/* --------- USB Function Interface ------------- */
+
+enum {
+ STR_ASSOC,
+ STR_IF_CTRL,
+ STR_CLKSRC_IN,
+ STR_CLKSRC_OUT,
+ STR_USB_IT,
+ STR_IO_IT,
+ STR_USB_OT,
+ STR_IO_OT,
+ STR_AS_OUT_ALT0,
+ STR_AS_OUT_ALT1,
+ STR_AS_IN_ALT0,
+ STR_AS_IN_ALT1,
+};
+
+static char clksrc_in[8];
+static char clksrc_out[8];
+
+static struct usb_string strings_fn[] = {
+ [STR_ASSOC].s = "Source/Sink",
+ [STR_IF_CTRL].s = "Topology Control",
+ [STR_CLKSRC_IN].s = clksrc_in,
+ [STR_CLKSRC_OUT].s = clksrc_out,
+ [STR_USB_IT].s = "USBH Out",
+ [STR_IO_IT].s = "USBD Out",
+ [STR_USB_OT].s = "USBH In",
+ [STR_IO_OT].s = "USBD In",
+ [STR_AS_OUT_ALT0].s = "Playback Inactive",
+ [STR_AS_OUT_ALT1].s = "Playback Active",
+ [STR_AS_IN_ALT0].s = "Capture Inactive",
+ [STR_AS_IN_ALT1].s = "Capture Active",
+ { },
+};
+
+static struct usb_gadget_strings str_fn = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_fn,
+};
+
+static struct usb_gadget_strings *fn_strings[] = {
+ &str_fn,
+ NULL,
+};
+
+static struct usb_qualifier_descriptor devqual_desc = {
+ .bLength = sizeof devqual_desc,
+ .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
+
+ .bcdUSB = cpu_to_le16(0x200),
+ .bDeviceClass = USB_CLASS_MISC,
+ .bDeviceSubClass = 0x02,
+ .bDeviceProtocol = 0x01,
+ .bNumConfigurations = 1,
+ .bRESERVED = 0,
+};
+
+static struct usb_interface_assoc_descriptor iad_desc = {
+ .bLength = sizeof iad_desc,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ .bFirstInterface = 0,
+ .bInterfaceCount = 3,
+ .bFunctionClass = USB_CLASS_AUDIO,
+ .bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED,
+ .bFunctionProtocol = UAC_VERSION_2,
+};
+
+/* Audio Control Interface */
+static struct usb_interface_descriptor std_ac_if_desc = {
+ .bLength = sizeof std_ac_if_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
+ .bInterfaceProtocol = UAC_VERSION_2,
+};
+
+/* Clock source for IN traffic */
+struct uac_clock_source_descriptor in_clk_src_desc = {
+ .bLength = sizeof in_clk_src_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC2_CLOCK_SOURCE,
+ .bClockID = USB_IN_CLK_ID,
+ .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
+ .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
+ .bAssocTerminal = 0,
+};
+
+/* Clock source for OUT traffic */
+struct uac_clock_source_descriptor out_clk_src_desc = {
+ .bLength = sizeof out_clk_src_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC2_CLOCK_SOURCE,
+ .bClockID = USB_OUT_CLK_ID,
+ .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
+ .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
+ .bAssocTerminal = 0,
+};
+
+/* Input Terminal for USB_OUT */
+struct uac2_input_terminal_descriptor usb_out_it_desc = {
+ .bLength = sizeof usb_out_it_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_INPUT_TERMINAL,
+ .bTerminalID = USB_OUT_IT_ID,
+ .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
+ .bAssocTerminal = 0,
+ .bCSourceID = USB_OUT_CLK_ID,
+ .iChannelNames = 0,
+ .bmControls = (CONTROL_RDWR << COPY_CTRL),
+};
+
+/* Input Terminal for I/O-In */
+struct uac2_input_terminal_descriptor io_in_it_desc = {
+ .bLength = sizeof io_in_it_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_INPUT_TERMINAL,
+ .bTerminalID = IO_IN_IT_ID,
+ .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED),
+ .bAssocTerminal = 0,
+ .bCSourceID = USB_IN_CLK_ID,
+ .iChannelNames = 0,
+ .bmControls = (CONTROL_RDWR << COPY_CTRL),
+};
+
+/* Ouput Terminal for USB_IN */
+struct uac2_output_terminal_descriptor usb_in_ot_desc = {
+ .bLength = sizeof usb_in_ot_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
+ .bTerminalID = USB_IN_OT_ID,
+ .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
+ .bAssocTerminal = 0,
+ .bSourceID = IO_IN_IT_ID,
+ .bCSourceID = USB_IN_CLK_ID,
+ .bmControls = (CONTROL_RDWR << COPY_CTRL),
+};
+
+/* Ouput Terminal for I/O-Out */
+struct uac2_output_terminal_descriptor io_out_ot_desc = {
+ .bLength = sizeof io_out_ot_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
+ .bTerminalID = IO_OUT_OT_ID,
+ .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED),
+ .bAssocTerminal = 0,
+ .bSourceID = USB_OUT_IT_ID,
+ .bCSourceID = USB_OUT_CLK_ID,
+ .bmControls = (CONTROL_RDWR << COPY_CTRL),
+};
+
+struct uac2_ac_header_descriptor ac_hdr_desc = {
+ .bLength = sizeof ac_hdr_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_MS_HEADER,
+ .bcdADC = cpu_to_le16(0x200),
+ .bCategory = UAC2_FUNCTION_IO_BOX,
+ .wTotalLength = sizeof in_clk_src_desc + sizeof out_clk_src_desc
+ + sizeof usb_out_it_desc + sizeof io_in_it_desc
+ + sizeof usb_in_ot_desc + sizeof io_out_ot_desc,
+ .bmControls = 0,
+};
+
+/* Audio Streaming OUT Interface - Alt0 */
+static struct usb_interface_descriptor std_as_out_if0_desc = {
+ .bLength = sizeof std_as_out_if0_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+ .bInterfaceProtocol = UAC_VERSION_2,
+};
+
+/* Audio Streaming OUT Interface - Alt1 */
+static struct usb_interface_descriptor std_as_out_if1_desc = {
+ .bLength = sizeof std_as_out_if1_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+ .bInterfaceProtocol = UAC_VERSION_2,
+};
+
+/* Audio Stream OUT Intface Desc */
+struct uac2_as_header_descriptor as_out_hdr_desc = {
+ .bLength = sizeof as_out_hdr_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_AS_GENERAL,
+ .bTerminalLink = USB_OUT_IT_ID,
+ .bmControls = 0,
+ .bFormatType = UAC_FORMAT_TYPE_I,
+ .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
+ .iChannelNames = 0,
+};
+
+/* Audio USB_OUT Format */
+struct uac2_format_type_i_descriptor as_out_fmt1_desc = {
+ .bLength = sizeof as_out_fmt1_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_FORMAT_TYPE,
+ .bFormatType = UAC_FORMAT_TYPE_I,
+};
+
+/* STD AS ISO OUT Endpoint */
+struct usb_endpoint_descriptor fs_epout_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ .bInterval = 1,
+};
+
+struct usb_endpoint_descriptor hs_epout_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ .bInterval = 4,
+};
+
+/* CS AS ISO OUT Endpoint */
+static struct uac2_iso_endpoint_descriptor as_iso_out_desc = {
+ .bLength = sizeof as_iso_out_desc,
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+
+ .bDescriptorSubtype = UAC_EP_GENERAL,
+ .bmAttributes = 0,
+ .bmControls = 0,
+ .bLockDelayUnits = 0,
+ .wLockDelay = 0,
+};
+
+/* Audio Streaming IN Interface - Alt0 */
+static struct usb_interface_descriptor std_as_in_if0_desc = {
+ .bLength = sizeof std_as_in_if0_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+ .bInterfaceProtocol = UAC_VERSION_2,
+};
+
+/* Audio Streaming IN Interface - Alt1 */
+static struct usb_interface_descriptor std_as_in_if1_desc = {
+ .bLength = sizeof std_as_in_if1_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+ .bInterfaceProtocol = UAC_VERSION_2,
+};
+
+/* Audio Stream IN Intface Desc */
+struct uac2_as_header_descriptor as_in_hdr_desc = {
+ .bLength = sizeof as_in_hdr_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+
+ .bDescriptorSubtype = UAC_AS_GENERAL,
+ .bTerminalLink = USB_IN_OT_ID,
+ .bmControls = 0,
+ .bFormatType = UAC_FORMAT_TYPE_I,
+ .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
+ .iChannelNames = 0,
+};
+
+/* Audio USB_IN Format */
+struct uac2_format_type_i_descriptor as_in_fmt1_desc = {
+ .bLength = sizeof as_in_fmt1_desc,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_FORMAT_TYPE,
+ .bFormatType = UAC_FORMAT_TYPE_I,
+};
+
+/* STD AS ISO IN Endpoint */
+struct usb_endpoint_descriptor fs_epin_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ .bInterval = 1,
+};
+
+struct usb_endpoint_descriptor hs_epin_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ .bInterval = 4,
+};
+
+/* CS AS ISO IN Endpoint */
+static struct uac2_iso_endpoint_descriptor as_iso_in_desc = {
+ .bLength = sizeof as_iso_in_desc,
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+
+ .bDescriptorSubtype = UAC_EP_GENERAL,
+ .bmAttributes = 0,
+ .bmControls = 0,
+ .bLockDelayUnits = 0,
+ .wLockDelay = 0,
+};
+
+static struct usb_descriptor_header *fs_audio_desc[] = {
+ (struct usb_descriptor_header *)&iad_desc,
+ (struct usb_descriptor_header *)&std_ac_if_desc,
+
+ (struct usb_descriptor_header *)&ac_hdr_desc,
+ (struct usb_descriptor_header *)&in_clk_src_desc,
+ (struct usb_descriptor_header *)&out_clk_src_desc,
+ (struct usb_descriptor_header *)&usb_out_it_desc,
+ (struct usb_descriptor_header *)&io_in_it_desc,
+ (struct usb_descriptor_header *)&usb_in_ot_desc,
+ (struct usb_descriptor_header *)&io_out_ot_desc,
+
+ (struct usb_descriptor_header *)&std_as_out_if0_desc,
+ (struct usb_descriptor_header *)&std_as_out_if1_desc,
+
+ (struct usb_descriptor_header *)&as_out_hdr_desc,
+ (struct usb_descriptor_header *)&as_out_fmt1_desc,
+ (struct usb_descriptor_header *)&fs_epout_desc,
+ (struct usb_descriptor_header *)&as_iso_out_desc,
+
+ (struct usb_descriptor_header *)&std_as_in_if0_desc,
+ (struct usb_descriptor_header *)&std_as_in_if1_desc,
+
+ (struct usb_descriptor_header *)&as_in_hdr_desc,
+ (struct usb_descriptor_header *)&as_in_fmt1_desc,
+ (struct usb_descriptor_header *)&fs_epin_desc,
+ (struct usb_descriptor_header *)&as_iso_in_desc,
+ NULL,
+};
+
+static struct usb_descriptor_header *hs_audio_desc[] = {
+ (struct usb_descriptor_header *)&iad_desc,
+ (struct usb_descriptor_header *)&std_ac_if_desc,
+
+ (struct usb_descriptor_header *)&ac_hdr_desc,
+ (struct usb_descriptor_header *)&in_clk_src_desc,
+ (struct usb_descriptor_header *)&out_clk_src_desc,
+ (struct usb_descriptor_header *)&usb_out_it_desc,
+ (struct usb_descriptor_header *)&io_in_it_desc,
+ (struct usb_descriptor_header *)&usb_in_ot_desc,
+ (struct usb_descriptor_header *)&io_out_ot_desc,
+
+ (struct usb_descriptor_header *)&std_as_out_if0_desc,
+ (struct usb_descriptor_header *)&std_as_out_if1_desc,
+
+ (struct usb_descriptor_header *)&as_out_hdr_desc,
+ (struct usb_descriptor_header *)&as_out_fmt1_desc,
+ (struct usb_descriptor_header *)&hs_epout_desc,
+ (struct usb_descriptor_header *)&as_iso_out_desc,
+
+ (struct usb_descriptor_header *)&std_as_in_if0_desc,
+ (struct usb_descriptor_header *)&std_as_in_if1_desc,
+
+ (struct usb_descriptor_header *)&as_in_hdr_desc,
+ (struct usb_descriptor_header *)&as_in_fmt1_desc,
+ (struct usb_descriptor_header *)&hs_epin_desc,
+ (struct usb_descriptor_header *)&as_iso_in_desc,
+ NULL,
+};
+
+struct cntrl_cur_lay3 {
+ __u32 dCUR;
+};
+
+struct cntrl_range_lay3 {
+ __u16 wNumSubRanges;
+ __u32 dMIN;
+ __u32 dMAX;
+ __u32 dRES;
+} __packed;
+
+static inline void
+free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep)
+{
+ struct snd_uac2_chip *uac2 = prm->uac2;
+ int i;
+
+ prm->ep_enabled = false;
+
+ for (i = 0; i < USB_XFERS; i++) {
+ if (prm->ureq[i].req) {
+ usb_ep_dequeue(ep, prm->ureq[i].req);
+ usb_ep_free_request(ep, prm->ureq[i].req);
+ prm->ureq[i].req = NULL;
+ }
+ }
+
+ if (usb_ep_disable(ep))
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+}
+
+static int __init
+afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
+{
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ struct usb_composite_dev *cdev = cfg->cdev;
+ struct usb_gadget *gadget = cdev->gadget;
+ struct uac2_rtd_params *prm;
+ int ret;
+
+ ret = usb_interface_id(cfg, fn);
+ if (ret < 0) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return ret;
+ }
+ std_ac_if_desc.bInterfaceNumber = ret;
+ agdev->ac_intf = ret;
+ agdev->ac_alt = 0;
+
+ ret = usb_interface_id(cfg, fn);
+ if (ret < 0) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return ret;
+ }
+ std_as_out_if0_desc.bInterfaceNumber = ret;
+ std_as_out_if1_desc.bInterfaceNumber = ret;
+ agdev->as_out_intf = ret;
+ agdev->as_out_alt = 0;
+
+ ret = usb_interface_id(cfg, fn);
+ if (ret < 0) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return ret;
+ }
+ std_as_in_if0_desc.bInterfaceNumber = ret;
+ std_as_in_if1_desc.bInterfaceNumber = ret;
+ agdev->as_in_intf = ret;
+ agdev->as_in_alt = 0;
+
+ agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
+ if (!agdev->out_ep) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ goto err;
+ }
+ agdev->out_ep->driver_data = agdev;
+
+ agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
+ if (!agdev->in_ep) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ goto err;
+ }
+ agdev->in_ep->driver_data = agdev;
+
+ uac2->p_prm.uac2 = uac2;
+ uac2->c_prm.uac2 = uac2;
+
+ hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
+ hs_epout_desc.wMaxPacketSize = fs_epout_desc.wMaxPacketSize;
+ hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
+ hs_epin_desc.wMaxPacketSize = fs_epin_desc.wMaxPacketSize;
+
+ ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL);
+ if (ret)
+ goto err;
+
+ prm = &agdev->uac2.c_prm;
+ prm->max_psize = hs_epout_desc.wMaxPacketSize;
+ prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
+ if (!prm->rbuf) {
+ prm->max_psize = 0;
+ goto err;
+ }
+
+ prm = &agdev->uac2.p_prm;
+ prm->max_psize = hs_epin_desc.wMaxPacketSize;
+ prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
+ if (!prm->rbuf) {
+ prm->max_psize = 0;
+ goto err;
+ }
+
+ ret = alsa_uac2_init(agdev);
+ if (ret)
+ goto err;
+ return 0;
+err:
+ kfree(agdev->uac2.p_prm.rbuf);
+ kfree(agdev->uac2.c_prm.rbuf);
+ usb_free_all_descriptors(fn);
+ if (agdev->in_ep)
+ agdev->in_ep->driver_data = NULL;
+ if (agdev->out_ep)
+ agdev->out_ep->driver_data = NULL;
+ return -EINVAL;
+}
+
+static void
+afunc_unbind(struct usb_configuration *cfg, struct usb_function *fn)
+{
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct uac2_rtd_params *prm;
+
+ alsa_uac2_exit(agdev);
+
+ prm = &agdev->uac2.p_prm;
+ kfree(prm->rbuf);
+
+ prm = &agdev->uac2.c_prm;
+ kfree(prm->rbuf);
+ usb_free_all_descriptors(fn);
+
+ if (agdev->in_ep)
+ agdev->in_ep->driver_data = NULL;
+ if (agdev->out_ep)
+ agdev->out_ep->driver_data = NULL;
+}
+
+static int
+afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
+{
+ struct usb_composite_dev *cdev = fn->config->cdev;
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ struct usb_gadget *gadget = cdev->gadget;
+ struct usb_request *req;
+ struct usb_ep *ep;
+ struct uac2_rtd_params *prm;
+ int i;
+
+ /* No i/f has more than 2 alt settings */
+ if (alt > 1) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return -EINVAL;
+ }
+
+ if (intf == agdev->ac_intf) {
+ /* Control I/f has only 1 AltSetting - 0 */
+ if (alt) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ if (intf == agdev->as_out_intf) {
+ ep = agdev->out_ep;
+ prm = &uac2->c_prm;
+ config_ep_by_speed(gadget, fn, ep);
+ agdev->as_out_alt = alt;
+ } else if (intf == agdev->as_in_intf) {
+ ep = agdev->in_ep;
+ prm = &uac2->p_prm;
+ config_ep_by_speed(gadget, fn, ep);
+ agdev->as_in_alt = alt;
+ } else {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return -EINVAL;
+ }
+
+ if (alt == 0) {
+ free_ep(prm, ep);
+ return 0;
+ }
+
+ prm->ep_enabled = true;
+ usb_ep_enable(ep);
+
+ for (i = 0; i < USB_XFERS; i++) {
+ if (prm->ureq[i].req) {
+ if (usb_ep_queue(ep, prm->ureq[i].req, GFP_ATOMIC))
+ dev_err(&uac2->pdev.dev, "%d Error!\n",
+ __LINE__);
+ continue;
+ }
+
+ req = usb_ep_alloc_request(ep, GFP_ATOMIC);
+ if (req == NULL) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return -EINVAL;
+ }
+
+ prm->ureq[i].req = req;
+ prm->ureq[i].pp = prm;
+
+ req->zero = 0;
+ req->context = &prm->ureq[i];
+ req->length = prm->max_psize;
+ req->complete = agdev_iso_complete;
+ req->buf = prm->rbuf + i * req->length;
+
+ if (usb_ep_queue(ep, req, GFP_ATOMIC))
+ dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__);
+ }
+
+ return 0;
+}
+
+static int
+afunc_get_alt(struct usb_function *fn, unsigned intf)
+{
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+
+ if (intf == agdev->ac_intf)
+ return agdev->ac_alt;
+ else if (intf == agdev->as_out_intf)
+ return agdev->as_out_alt;
+ else if (intf == agdev->as_in_intf)
+ return agdev->as_in_alt;
+ else
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Invalid Interface %d!\n",
+ __func__, __LINE__, intf);
+
+ return -EINVAL;
+}
+
+static void
+afunc_disable(struct usb_function *fn)
+{
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+
+ free_ep(&uac2->p_prm, agdev->in_ep);
+ agdev->as_in_alt = 0;
+
+ free_ep(&uac2->c_prm, agdev->out_ep);
+ agdev->as_out_alt = 0;
+}
+
+static int
+in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+ struct usb_request *req = fn->config->cdev->req;
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ u16 w_length = le16_to_cpu(cr->wLength);
+ u16 w_index = le16_to_cpu(cr->wIndex);
+ u16 w_value = le16_to_cpu(cr->wValue);
+ u8 entity_id = (w_index >> 8) & 0xff;
+ u8 control_selector = w_value >> 8;
+ int value = -EOPNOTSUPP;
+
+ if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
+ struct cntrl_cur_lay3 c;
+
+ if (entity_id == USB_IN_CLK_ID)
+ c.dCUR = p_srate;
+ else if (entity_id == USB_OUT_CLK_ID)
+ c.dCUR = c_srate;
+
+ value = min_t(unsigned, w_length, sizeof c);
+ memcpy(req->buf, &c, value);
+ } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
+ *(u8 *)req->buf = 1;
+ value = min_t(unsigned, w_length, 1);
+ } else {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ }
+
+ return value;
+}
+
+static int
+in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+ struct usb_request *req = fn->config->cdev->req;
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ u16 w_length = le16_to_cpu(cr->wLength);
+ u16 w_index = le16_to_cpu(cr->wIndex);
+ u16 w_value = le16_to_cpu(cr->wValue);
+ u8 entity_id = (w_index >> 8) & 0xff;
+ u8 control_selector = w_value >> 8;
+ struct cntrl_range_lay3 r;
+ int value = -EOPNOTSUPP;
+
+ if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
+ if (entity_id == USB_IN_CLK_ID)
+ r.dMIN = p_srate;
+ else if (entity_id == USB_OUT_CLK_ID)
+ r.dMIN = c_srate;
+ else
+ return -EOPNOTSUPP;
+
+ r.dMAX = r.dMIN;
+ r.dRES = 0;
+ r.wNumSubRanges = 1;
+
+ value = min_t(unsigned, w_length, sizeof r);
+ memcpy(req->buf, &r, value);
+ } else {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ }
+
+ return value;
+}
+
+static int
+ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+ if (cr->bRequest == UAC2_CS_CUR)
+ return in_rq_cur(fn, cr);
+ else if (cr->bRequest == UAC2_CS_RANGE)
+ return in_rq_range(fn, cr);
+ else
+ return -EOPNOTSUPP;
+}
+
+static int
+out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+ u16 w_length = le16_to_cpu(cr->wLength);
+ u16 w_value = le16_to_cpu(cr->wValue);
+ u8 control_selector = w_value >> 8;
+
+ if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
+ return w_length;
+
+ return -EOPNOTSUPP;
+}
+
+static int
+setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ u16 w_index = le16_to_cpu(cr->wIndex);
+ u8 intf = w_index & 0xff;
+
+ if (intf != agdev->ac_intf) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ return -EOPNOTSUPP;
+ }
+
+ if (cr->bRequestType & USB_DIR_IN)
+ return ac_rq_in(fn, cr);
+ else if (cr->bRequest == UAC2_CS_CUR)
+ return out_rq_cur(fn, cr);
+
+ return -EOPNOTSUPP;
+}
+
+static int
+afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr)
+{
+ struct usb_composite_dev *cdev = fn->config->cdev;
+ struct audio_dev *agdev = func_to_agdev(fn);
+ struct snd_uac2_chip *uac2 = &agdev->uac2;
+ struct usb_request *req = cdev->req;
+ u16 w_length = le16_to_cpu(cr->wLength);
+ int value = -EOPNOTSUPP;
+
+ /* Only Class specific requests are supposed to reach here */
+ if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS)
+ return -EOPNOTSUPP;
+
+ if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE)
+ value = setup_rq_inf(fn, cr);
+ else
+ dev_err(&uac2->pdev.dev, "%s:%d Error!\n", __func__, __LINE__);
+
+ if (value >= 0) {
+ req->length = value;
+ req->zero = value < w_length;
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (value < 0) {
+ dev_err(&uac2->pdev.dev,
+ "%s:%d Error!\n", __func__, __LINE__);
+ req->status = 0;
+ }
+ }
+
+ return value;
+}
+
+static int audio_bind_config(struct usb_configuration *cfg)
+{
+ int res;
+
+ agdev_g = kzalloc(sizeof *agdev_g, GFP_KERNEL);
+ if (agdev_g == NULL)
+ return -ENOMEM;
+
+ res = usb_string_ids_tab(cfg->cdev, strings_fn);
+ if (res)
+ return res;
+ iad_desc.iFunction = strings_fn[STR_ASSOC].id;
+ std_ac_if_desc.iInterface = strings_fn[STR_IF_CTRL].id;
+ in_clk_src_desc.iClockSource = strings_fn[STR_CLKSRC_IN].id;
+ out_clk_src_desc.iClockSource = strings_fn[STR_CLKSRC_OUT].id;
+ usb_out_it_desc.iTerminal = strings_fn[STR_USB_IT].id;
+ io_in_it_desc.iTerminal = strings_fn[STR_IO_IT].id;
+ usb_in_ot_desc.iTerminal = strings_fn[STR_USB_OT].id;
+ io_out_ot_desc.iTerminal = strings_fn[STR_IO_OT].id;
+ std_as_out_if0_desc.iInterface = strings_fn[STR_AS_OUT_ALT0].id;
+ std_as_out_if1_desc.iInterface = strings_fn[STR_AS_OUT_ALT1].id;
+ std_as_in_if0_desc.iInterface = strings_fn[STR_AS_IN_ALT0].id;
+ std_as_in_if1_desc.iInterface = strings_fn[STR_AS_IN_ALT1].id;
+
+ agdev_g->func.name = "uac2_func";
+ agdev_g->func.strings = fn_strings;
+ agdev_g->func.bind = afunc_bind;
+ agdev_g->func.unbind = afunc_unbind;
+ agdev_g->func.set_alt = afunc_set_alt;
+ agdev_g->func.get_alt = afunc_get_alt;
+ agdev_g->func.disable = afunc_disable;
+ agdev_g->func.setup = afunc_setup;
+
+ /* Initialize the configurable parameters */
+ usb_out_it_desc.bNrChannels = num_channels(c_chmask);
+ usb_out_it_desc.bmChannelConfig = cpu_to_le32(c_chmask);
+ io_in_it_desc.bNrChannels = num_channels(p_chmask);
+ io_in_it_desc.bmChannelConfig = cpu_to_le32(p_chmask);
+ as_out_hdr_desc.bNrChannels = num_channels(c_chmask);
+ as_out_hdr_desc.bmChannelConfig = cpu_to_le32(c_chmask);
+ as_in_hdr_desc.bNrChannels = num_channels(p_chmask);
+ as_in_hdr_desc.bmChannelConfig = cpu_to_le32(p_chmask);
+ as_out_fmt1_desc.bSubslotSize = c_ssize;
+ as_out_fmt1_desc.bBitResolution = c_ssize * 8;
+ as_in_fmt1_desc.bSubslotSize = p_ssize;
+ as_in_fmt1_desc.bBitResolution = p_ssize * 8;
+
+ snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", p_srate);
+ snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", c_srate);
+
+ res = usb_add_function(cfg, &agdev_g->func);
+ if (res < 0)
+ kfree(agdev_g);
+
+ return res;
+}
+
+static void
+uac2_unbind_config(struct usb_configuration *cfg)
+{
+ kfree(agdev_g);
+ agdev_g = NULL;
+}
--- /dev/null
+/*
+ * uvc_gadget.c -- USB Video Class Gadget driver
+ *
+ * Copyright (C) 2009-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/string.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/video.h>
+#include <linux/vmalloc.h>
+#include <linux/wait.h>
+
+#include <media/v4l2-dev.h>
+#include <media/v4l2-event.h>
+
+#include "uvc.h"
+
+unsigned int uvc_gadget_trace_param;
+
+/*-------------------------------------------------------------------------*/
+
+/* module parameters specific to the Video streaming endpoint */
+static unsigned int streaming_interval = 1;
+module_param(streaming_interval, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(streaming_interval, "1 - 16");
+
+static unsigned int streaming_maxpacket = 1024;
+module_param(streaming_maxpacket, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(streaming_maxpacket, "1 - 1023 (FS), 1 - 3072 (hs/ss)");
+
+static unsigned int streaming_maxburst;
+module_param(streaming_maxburst, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)");
+
+/* --------------------------------------------------------------------------
+ * Function descriptors
+ */
+
+/* string IDs are assigned dynamically */
+
+#define UVC_STRING_CONTROL_IDX 0
+#define UVC_STRING_STREAMING_IDX 1
+
+static struct usb_string uvc_en_us_strings[] = {
+ [UVC_STRING_CONTROL_IDX].s = "UVC Camera",
+ [UVC_STRING_STREAMING_IDX].s = "Video Streaming",
+ { }
+};
+
+static struct usb_gadget_strings uvc_stringtab = {
+ .language = 0x0409, /* en-us */
+ .strings = uvc_en_us_strings,
+};
+
+static struct usb_gadget_strings *uvc_function_strings[] = {
+ &uvc_stringtab,
+ NULL,
+};
+
+#define UVC_INTF_VIDEO_CONTROL 0
+#define UVC_INTF_VIDEO_STREAMING 1
+
+#define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */
+
+static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
+ .bLength = sizeof(uvc_iad),
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+ .bFirstInterface = 0,
+ .bInterfaceCount = 2,
+ .bFunctionClass = USB_CLASS_VIDEO,
+ .bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION,
+ .bFunctionProtocol = 0x00,
+ .iFunction = 0,
+};
+
+static struct usb_interface_descriptor uvc_control_intf __initdata = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = UVC_INTF_VIDEO_CONTROL,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = UVC_SC_VIDEOCONTROL,
+ .bInterfaceProtocol = 0x00,
+ .iInterface = 0,
+};
+
+static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
+ .bInterval = 8,
+};
+
+static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
+ .bLength = sizeof(uvc_ss_control_comp),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* The following 3 values can be tweaked if necessary. */
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
+};
+
+static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
+ .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+ .bDescriptorSubType = UVC_EP_INTERRUPT,
+ .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
+};
+
+static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
+ .bInterfaceProtocol = 0x00,
+ .iInterface = 0,
+};
+
+static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
+ .bInterfaceProtocol = 0x00,
+ .iInterface = 0,
+};
+
+static struct usb_endpoint_descriptor uvc_fs_streaming_ep __initdata = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ /* The wMaxPacketSize and bInterval values will be initialized from
+ * module parameters.
+ */
+};
+
+static struct usb_endpoint_descriptor uvc_hs_streaming_ep __initdata = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ /* The wMaxPacketSize and bInterval values will be initialized from
+ * module parameters.
+ */
+};
+
+static struct usb_endpoint_descriptor uvc_ss_streaming_ep __initdata = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ /* The wMaxPacketSize and bInterval values will be initialized from
+ * module parameters.
+ */
+};
+
+static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp __initdata = {
+ .bLength = sizeof(uvc_ss_streaming_comp),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* The bMaxBurst, bmAttributes and wBytesPerInterval values will be
+ * initialized from module parameters.
+ */
+};
+
+static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
+ (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
+ (struct usb_descriptor_header *) &uvc_fs_streaming_ep,
+ NULL,
+};
+
+static const struct usb_descriptor_header * const uvc_hs_streaming[] = {
+ (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
+ (struct usb_descriptor_header *) &uvc_hs_streaming_ep,
+ NULL,
+};
+
+static const struct usb_descriptor_header * const uvc_ss_streaming[] = {
+ (struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
+ (struct usb_descriptor_header *) &uvc_ss_streaming_ep,
+ (struct usb_descriptor_header *) &uvc_ss_streaming_comp,
+ NULL,
+};
+
+/* --------------------------------------------------------------------------
+ * Control requests
+ */
+
+static void
+uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct uvc_device *uvc = req->context;
+ struct v4l2_event v4l2_event;
+ struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
+
+ if (uvc->event_setup_out) {
+ uvc->event_setup_out = 0;
+
+ memset(&v4l2_event, 0, sizeof(v4l2_event));
+ v4l2_event.type = UVC_EVENT_DATA;
+ uvc_event->data.length = req->actual;
+ memcpy(&uvc_event->data.data, req->buf, req->actual);
+ v4l2_event_queue(uvc->vdev, &v4l2_event);
+ }
+}
+
+static int
+uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct uvc_device *uvc = to_uvc(f);
+ struct v4l2_event v4l2_event;
+ struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
+
+ /* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n",
+ * ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue),
+ * le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength));
+ */
+
+ if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) {
+ INFO(f->config->cdev, "invalid request type\n");
+ return -EINVAL;
+ }
+
+ /* Stall too big requests. */
+ if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE)
+ return -EINVAL;
+
+ memset(&v4l2_event, 0, sizeof(v4l2_event));
+ v4l2_event.type = UVC_EVENT_SETUP;
+ memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req));
+ v4l2_event_queue(uvc->vdev, &v4l2_event);
+
+ return 0;
+}
+
+void uvc_function_setup_continue(struct uvc_device *uvc)
+{
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+
+ usb_composite_setup_continue(cdev);
+}
+
+static int
+uvc_function_get_alt(struct usb_function *f, unsigned interface)
+{
+ struct uvc_device *uvc = to_uvc(f);
+
+ INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface);
+
+ if (interface == uvc->control_intf)
+ return 0;
+ else if (interface != uvc->streaming_intf)
+ return -EINVAL;
+ else
+ return uvc->state == UVC_STATE_STREAMING ? 1 : 0;
+}
+
+static int
+uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
+{
+ struct uvc_device *uvc = to_uvc(f);
+ struct v4l2_event v4l2_event;
+ struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
+ int ret;
+
+ INFO(f->config->cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt);
+
+ if (interface == uvc->control_intf) {
+ if (alt)
+ return -EINVAL;
+
+ if (uvc->state == UVC_STATE_DISCONNECTED) {
+ memset(&v4l2_event, 0, sizeof(v4l2_event));
+ v4l2_event.type = UVC_EVENT_CONNECT;
+ uvc_event->speed = f->config->cdev->gadget->speed;
+ v4l2_event_queue(uvc->vdev, &v4l2_event);
+
+ uvc->state = UVC_STATE_CONNECTED;
+ }
+
+ return 0;
+ }
+
+ if (interface != uvc->streaming_intf)
+ return -EINVAL;
+
+ /* TODO
+ if (usb_endpoint_xfer_bulk(&uvc->desc.vs_ep))
+ return alt ? -EINVAL : 0;
+ */
+
+ switch (alt) {
+ case 0:
+ if (uvc->state != UVC_STATE_STREAMING)
+ return 0;
+
+ if (uvc->video.ep)
+ usb_ep_disable(uvc->video.ep);
+
+ memset(&v4l2_event, 0, sizeof(v4l2_event));
+ v4l2_event.type = UVC_EVENT_STREAMOFF;
+ v4l2_event_queue(uvc->vdev, &v4l2_event);
+
+ uvc->state = UVC_STATE_CONNECTED;
+ return 0;
+
+ case 1:
+ if (uvc->state != UVC_STATE_CONNECTED)
+ return 0;
+
+ if (uvc->video.ep) {
+ ret = config_ep_by_speed(f->config->cdev->gadget,
+ &(uvc->func), uvc->video.ep);
+ if (ret)
+ return ret;
+ usb_ep_enable(uvc->video.ep);
+ }
+
+ memset(&v4l2_event, 0, sizeof(v4l2_event));
+ v4l2_event.type = UVC_EVENT_STREAMON;
+ v4l2_event_queue(uvc->vdev, &v4l2_event);
+ return USB_GADGET_DELAYED_STATUS;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static void
+uvc_function_disable(struct usb_function *f)
+{
+ struct uvc_device *uvc = to_uvc(f);
+ struct v4l2_event v4l2_event;
+
+ INFO(f->config->cdev, "uvc_function_disable\n");
+
+ memset(&v4l2_event, 0, sizeof(v4l2_event));
+ v4l2_event.type = UVC_EVENT_DISCONNECT;
+ v4l2_event_queue(uvc->vdev, &v4l2_event);
+
+ uvc->state = UVC_STATE_DISCONNECTED;
+}
+
+/* --------------------------------------------------------------------------
+ * Connection / disconnection
+ */
+
+void
+uvc_function_connect(struct uvc_device *uvc)
+{
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+ int ret;
+
+ if ((ret = usb_function_activate(&uvc->func)) < 0)
+ INFO(cdev, "UVC connect failed with %d\n", ret);
+}
+
+void
+uvc_function_disconnect(struct uvc_device *uvc)
+{
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+ int ret;
+
+ if ((ret = usb_function_deactivate(&uvc->func)) < 0)
+ INFO(cdev, "UVC disconnect failed with %d\n", ret);
+}
+
+/* --------------------------------------------------------------------------
+ * USB probe and disconnect
+ */
+
+static int
+uvc_register_video(struct uvc_device *uvc)
+{
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+ struct video_device *video;
+
+ /* TODO reference counting. */
+ video = video_device_alloc();
+ if (video == NULL)
+ return -ENOMEM;
+
+ video->v4l2_dev = &uvc->v4l2_dev;
+ video->fops = &uvc_v4l2_fops;
+ video->release = video_device_release;
+ strlcpy(video->name, cdev->gadget->name, sizeof(video->name));
+
+ uvc->vdev = video;
+ video_set_drvdata(video, uvc);
+
+ return video_register_device(video, VFL_TYPE_GRABBER, -1);
+}
+
+#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
+ do { \
+ memcpy(mem, desc, (desc)->bLength); \
+ *(dst)++ = mem; \
+ mem += (desc)->bLength; \
+ } while (0);
+
+#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
+ do { \
+ const struct usb_descriptor_header * const *__src; \
+ for (__src = src; *__src; ++__src) { \
+ memcpy(mem, *__src, (*__src)->bLength); \
+ *dst++ = mem; \
+ mem += (*__src)->bLength; \
+ } \
+ } while (0)
+
+static struct usb_descriptor_header ** __init
+uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
+{
+ struct uvc_input_header_descriptor *uvc_streaming_header;
+ struct uvc_header_descriptor *uvc_control_header;
+ const struct uvc_descriptor_header * const *uvc_control_desc;
+ const struct uvc_descriptor_header * const *uvc_streaming_cls;
+ const struct usb_descriptor_header * const *uvc_streaming_std;
+ const struct usb_descriptor_header * const *src;
+ struct usb_descriptor_header **dst;
+ struct usb_descriptor_header **hdr;
+ unsigned int control_size;
+ unsigned int streaming_size;
+ unsigned int n_desc;
+ unsigned int bytes;
+ void *mem;
+
+ switch (speed) {
+ case USB_SPEED_SUPER:
+ uvc_control_desc = uvc->desc.ss_control;
+ uvc_streaming_cls = uvc->desc.ss_streaming;
+ uvc_streaming_std = uvc_ss_streaming;
+ break;
+
+ case USB_SPEED_HIGH:
+ uvc_control_desc = uvc->desc.fs_control;
+ uvc_streaming_cls = uvc->desc.hs_streaming;
+ uvc_streaming_std = uvc_hs_streaming;
+ break;
+
+ case USB_SPEED_FULL:
+ default:
+ uvc_control_desc = uvc->desc.fs_control;
+ uvc_streaming_cls = uvc->desc.fs_streaming;
+ uvc_streaming_std = uvc_fs_streaming;
+ break;
+ }
+
+ /* Descriptors layout
+ *
+ * uvc_iad
+ * uvc_control_intf
+ * Class-specific UVC control descriptors
+ * uvc_control_ep
+ * uvc_control_cs_ep
+ * uvc_ss_control_comp (for SS only)
+ * uvc_streaming_intf_alt0
+ * Class-specific UVC streaming descriptors
+ * uvc_{fs|hs}_streaming
+ */
+
+ /* Count descriptors and compute their size. */
+ control_size = 0;
+ streaming_size = 0;
+ bytes = uvc_iad.bLength + uvc_control_intf.bLength
+ + uvc_control_ep.bLength + uvc_control_cs_ep.bLength
+ + uvc_streaming_intf_alt0.bLength;
+
+ if (speed == USB_SPEED_SUPER) {
+ bytes += uvc_ss_control_comp.bLength;
+ n_desc = 6;
+ } else {
+ n_desc = 5;
+ }
+
+ for (src = (const struct usb_descriptor_header **)uvc_control_desc;
+ *src; ++src) {
+ control_size += (*src)->bLength;
+ bytes += (*src)->bLength;
+ n_desc++;
+ }
+ for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
+ *src; ++src) {
+ streaming_size += (*src)->bLength;
+ bytes += (*src)->bLength;
+ n_desc++;
+ }
+ for (src = uvc_streaming_std; *src; ++src) {
+ bytes += (*src)->bLength;
+ n_desc++;
+ }
+
+ mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
+ if (mem == NULL)
+ return NULL;
+
+ hdr = mem;
+ dst = mem;
+ mem += (n_desc + 1) * sizeof(*src);
+
+ /* Copy the descriptors. */
+ UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
+ UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
+
+ uvc_control_header = mem;
+ UVC_COPY_DESCRIPTORS(mem, dst,
+ (const struct usb_descriptor_header **)uvc_control_desc);
+ uvc_control_header->wTotalLength = cpu_to_le16(control_size);
+ uvc_control_header->bInCollection = 1;
+ uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
+
+ UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
+ if (speed == USB_SPEED_SUPER)
+ UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
+
+ UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
+ UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
+
+ uvc_streaming_header = mem;
+ UVC_COPY_DESCRIPTORS(mem, dst,
+ (const struct usb_descriptor_header**)uvc_streaming_cls);
+ uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
+ uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
+
+ UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
+
+ *dst = NULL;
+ return hdr;
+}
+
+static void
+uvc_function_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct uvc_device *uvc = to_uvc(f);
+
+ INFO(cdev, "uvc_function_unbind\n");
+
+ video_unregister_device(uvc->vdev);
+ v4l2_device_unregister(&uvc->v4l2_dev);
+ uvc->control_ep->driver_data = NULL;
+ uvc->video.ep->driver_data = NULL;
+
+ uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = 0;
+ usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
+ kfree(uvc->control_buf);
+
+ usb_free_all_descriptors(f);
+
+ kfree(uvc);
+}
+
+static int __init
+uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct uvc_device *uvc = to_uvc(f);
+ unsigned int max_packet_mult;
+ unsigned int max_packet_size;
+ struct usb_ep *ep;
+ int ret = -EINVAL;
+
+ INFO(cdev, "uvc_function_bind\n");
+
+ /* Sanity check the streaming endpoint module parameters.
+ */
+ streaming_interval = clamp(streaming_interval, 1U, 16U);
+ streaming_maxpacket = clamp(streaming_maxpacket, 1U, 3072U);
+ streaming_maxburst = min(streaming_maxburst, 15U);
+
+ /* Fill in the FS/HS/SS Video Streaming specific descriptors from the
+ * module parameters.
+ *
+ * NOTE: We assume that the user knows what they are doing and won't
+ * give parameters that their UDC doesn't support.
+ */
+ if (streaming_maxpacket <= 1024) {
+ max_packet_mult = 1;
+ max_packet_size = streaming_maxpacket;
+ } else if (streaming_maxpacket <= 2048) {
+ max_packet_mult = 2;
+ max_packet_size = streaming_maxpacket / 2;
+ } else {
+ max_packet_mult = 3;
+ max_packet_size = streaming_maxpacket / 3;
+ }
+
+ uvc_fs_streaming_ep.wMaxPacketSize = min(streaming_maxpacket, 1023U);
+ uvc_fs_streaming_ep.bInterval = streaming_interval;
+
+ uvc_hs_streaming_ep.wMaxPacketSize = max_packet_size;
+ uvc_hs_streaming_ep.wMaxPacketSize |= ((max_packet_mult - 1) << 11);
+ uvc_hs_streaming_ep.bInterval = streaming_interval;
+
+ uvc_ss_streaming_ep.wMaxPacketSize = max_packet_size;
+ uvc_ss_streaming_ep.bInterval = streaming_interval;
+ uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1;
+ uvc_ss_streaming_comp.bMaxBurst = streaming_maxburst;
+ uvc_ss_streaming_comp.wBytesPerInterval =
+ max_packet_size * max_packet_mult * streaming_maxburst;
+
+ /* Allocate endpoints. */
+ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
+ if (!ep) {
+ INFO(cdev, "Unable to allocate control EP\n");
+ goto error;
+ }
+ uvc->control_ep = ep;
+ ep->driver_data = uvc;
+
+ if (gadget_is_superspeed(c->cdev->gadget))
+ ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
+ &uvc_ss_streaming_comp);
+ else if (gadget_is_dualspeed(cdev->gadget))
+ ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep);
+ else
+ ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
+
+ if (!ep) {
+ INFO(cdev, "Unable to allocate streaming EP\n");
+ goto error;
+ }
+ uvc->video.ep = ep;
+ ep->driver_data = uvc;
+
+ uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
+ uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
+ uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
+
+ /* Allocate interface IDs. */
+ if ((ret = usb_interface_id(c, f)) < 0)
+ goto error;
+ uvc_iad.bFirstInterface = ret;
+ uvc_control_intf.bInterfaceNumber = ret;
+ uvc->control_intf = ret;
+
+ if ((ret = usb_interface_id(c, f)) < 0)
+ goto error;
+ uvc_streaming_intf_alt0.bInterfaceNumber = ret;
+ uvc_streaming_intf_alt1.bInterfaceNumber = ret;
+ uvc->streaming_intf = ret;
+
+ /* Copy descriptors */
+ f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
+ if (gadget_is_dualspeed(cdev->gadget))
+ f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
+ if (gadget_is_superspeed(c->cdev->gadget))
+ f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
+
+ /* Preallocate control endpoint request. */
+ uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
+ uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
+ if (uvc->control_req == NULL || uvc->control_buf == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ uvc->control_req->buf = uvc->control_buf;
+ uvc->control_req->complete = uvc_function_ep0_complete;
+ uvc->control_req->context = uvc;
+
+ /* Avoid letting this gadget enumerate until the userspace server is
+ * active.
+ */
+ if ((ret = usb_function_deactivate(f)) < 0)
+ goto error;
+
+ if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
+ printk(KERN_INFO "v4l2_device_register failed\n");
+ goto error;
+ }
+
+ /* Initialise video. */
+ ret = uvc_video_init(&uvc->video);
+ if (ret < 0)
+ goto error;
+
+ /* Register a V4L2 device. */
+ ret = uvc_register_video(uvc);
+ if (ret < 0) {
+ printk(KERN_INFO "Unable to register video device\n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ v4l2_device_unregister(&uvc->v4l2_dev);
+ if (uvc->vdev)
+ video_device_release(uvc->vdev);
+
+ if (uvc->control_ep)
+ uvc->control_ep->driver_data = NULL;
+ if (uvc->video.ep)
+ uvc->video.ep->driver_data = NULL;
+
+ if (uvc->control_req) {
+ usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
+ kfree(uvc->control_buf);
+ }
+
+ usb_free_all_descriptors(f);
+ return ret;
+}
+
+/* --------------------------------------------------------------------------
+ * USB gadget function
+ */
+
+/**
+ * uvc_bind_config - add a UVC function to a configuration
+ * @c: the configuration to support the UVC instance
+ * Context: single threaded during gadget setup
+ *
+ * Returns zero on success, else negative errno.
+ *
+ * Caller must have called @uvc_setup(). Caller is also responsible for
+ * calling @uvc_cleanup() before module unload.
+ */
+int __init
+uvc_bind_config(struct usb_configuration *c,
+ const struct uvc_descriptor_header * const *fs_control,
+ const struct uvc_descriptor_header * const *ss_control,
+ const struct uvc_descriptor_header * const *fs_streaming,
+ const struct uvc_descriptor_header * const *hs_streaming,
+ const struct uvc_descriptor_header * const *ss_streaming)
+{
+ struct uvc_device *uvc;
+ int ret = 0;
+
+ /* TODO Check if the USB device controller supports the required
+ * features.
+ */
+ if (!gadget_is_dualspeed(c->cdev->gadget))
+ return -EINVAL;
+
+ uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
+ if (uvc == NULL)
+ return -ENOMEM;
+
+ uvc->state = UVC_STATE_DISCONNECTED;
+
+ /* Validate the descriptors. */
+ if (fs_control == NULL || fs_control[0] == NULL ||
+ fs_control[0]->bDescriptorSubType != UVC_VC_HEADER)
+ goto error;
+
+ if (ss_control == NULL || ss_control[0] == NULL ||
+ ss_control[0]->bDescriptorSubType != UVC_VC_HEADER)
+ goto error;
+
+ if (fs_streaming == NULL || fs_streaming[0] == NULL ||
+ fs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
+ goto error;
+
+ if (hs_streaming == NULL || hs_streaming[0] == NULL ||
+ hs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
+ goto error;
+
+ if (ss_streaming == NULL || ss_streaming[0] == NULL ||
+ ss_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
+ goto error;
+
+ uvc->desc.fs_control = fs_control;
+ uvc->desc.ss_control = ss_control;
+ uvc->desc.fs_streaming = fs_streaming;
+ uvc->desc.hs_streaming = hs_streaming;
+ uvc->desc.ss_streaming = ss_streaming;
+
+ /* String descriptors are global, we only need to allocate string IDs
+ * for the first UVC function. UVC functions beyond the first (if any)
+ * will reuse the same IDs.
+ */
+ if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) {
+ ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings);
+ if (ret)
+ goto error;
+ uvc_iad.iFunction =
+ uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
+ uvc_control_intf.iInterface =
+ uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
+ ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id;
+ uvc_streaming_intf_alt0.iInterface = ret;
+ uvc_streaming_intf_alt1.iInterface = ret;
+ }
+
+ /* Register the function. */
+ uvc->func.name = "uvc";
+ uvc->func.strings = uvc_function_strings;
+ uvc->func.bind = uvc_function_bind;
+ uvc->func.unbind = uvc_function_unbind;
+ uvc->func.get_alt = uvc_function_get_alt;
+ uvc->func.set_alt = uvc_function_set_alt;
+ uvc->func.disable = uvc_function_disable;
+ uvc->func.setup = uvc_function_setup;
+
+ ret = usb_add_function(c, &uvc->func);
+ if (ret)
+ kfree(uvc);
+
+ return ret;
+
+error:
+ kfree(uvc);
+ return ret;
+}
+
+module_param_named(trace, uvc_gadget_trace_param, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(trace, "Trace level bitmask");
+
--- /dev/null
+/*
+ * f_uvc.h -- USB Video Class Gadget driver
+ *
+ * Copyright (C) 2009-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _F_UVC_H_
+#define _F_UVC_H_
+
+#include <linux/usb/composite.h>
+#include <linux/usb/video.h>
+
+int uvc_bind_config(struct usb_configuration *c,
+ const struct uvc_descriptor_header * const *fs_control,
+ const struct uvc_descriptor_header * const *hs_control,
+ const struct uvc_descriptor_header * const *fs_streaming,
+ const struct uvc_descriptor_header * const *hs_streaming,
+ const struct uvc_descriptor_header * const *ss_streaming);
+
+#endif /* _F_UVC_H_ */
+
--- /dev/null
+/*
+ * This header declares the utility functions used by "Gadget Zero", plus
+ * interfaces to its two single-configuration function drivers.
+ */
+
+#ifndef __G_ZERO_H
+#define __G_ZERO_H
+
+#define GZERO_BULK_BUFLEN 4096
+#define GZERO_QLEN 32
+#define GZERO_ISOC_INTERVAL 4
+#define GZERO_ISOC_MAXPACKET 1024
+
+struct usb_zero_options {
+ unsigned pattern;
+ unsigned isoc_interval;
+ unsigned isoc_maxpacket;
+ unsigned isoc_mult;
+ unsigned isoc_maxburst;
+ unsigned bulk_buflen;
+ unsigned qlen;
+};
+
+struct f_ss_opts {
+ struct usb_function_instance func_inst;
+ unsigned pattern;
+ unsigned isoc_interval;
+ unsigned isoc_maxpacket;
+ unsigned isoc_mult;
+ unsigned isoc_maxburst;
+ unsigned bulk_buflen;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+struct f_lb_opts {
+ struct usb_function_instance func_inst;
+ unsigned bulk_buflen;
+ unsigned qlen;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+void lb_modexit(void);
+int lb_modinit(void);
+
+/* common utilities */
+void free_ep_req(struct usb_ep *ep, struct usb_request *req);
+void disable_endpoints(struct usb_composite_dev *cdev,
+ struct usb_ep *in, struct usb_ep *out,
+ struct usb_ep *iso_in, struct usb_ep *iso_out);
+
+#endif /* __G_ZERO_H */
--- /dev/null
+/*
+ * ndis.h
+ *
+ * ntddndis.h modified by Benedikt Spranger <b.spranger@pengutronix.de>
+ *
+ * Thanks to the cygwin development team,
+ * espacially to Casper S. Hornstrup <chorns@users.sourceforge.net>
+ *
+ * THIS SOFTWARE IS NOT COPYRIGHTED
+ *
+ * This source code is offered for use in the public domain. You may
+ * use, modify or distribute it freely.
+ */
+
+#ifndef _LINUX_NDIS_H
+#define _LINUX_NDIS_H
+
+enum NDIS_DEVICE_POWER_STATE {
+ NdisDeviceStateUnspecified = 0,
+ NdisDeviceStateD0,
+ NdisDeviceStateD1,
+ NdisDeviceStateD2,
+ NdisDeviceStateD3,
+ NdisDeviceStateMaximum
+};
+
+struct NDIS_PM_WAKE_UP_CAPABILITIES {
+ enum NDIS_DEVICE_POWER_STATE MinMagicPacketWakeUp;
+ enum NDIS_DEVICE_POWER_STATE MinPatternWakeUp;
+ enum NDIS_DEVICE_POWER_STATE MinLinkChangeWakeUp;
+};
+
+struct NDIS_PNP_CAPABILITIES {
+ __le32 Flags;
+ struct NDIS_PM_WAKE_UP_CAPABILITIES WakeUpCapabilities;
+};
+
+struct NDIS_PM_PACKET_PATTERN {
+ __le32 Priority;
+ __le32 Reserved;
+ __le32 MaskSize;
+ __le32 PatternOffset;
+ __le32 PatternSize;
+ __le32 PatternFlags;
+};
+
+#endif /* _LINUX_NDIS_H */
--- /dev/null
+/*
+ * RNDIS MSG parser
+ *
+ * Authors: Benedikt Spranger, Pengutronix
+ * Robert Schwebel, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This software was originally developed in conformance with
+ * Microsoft's Remote NDIS Specification License Agreement.
+ *
+ * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
+ * Fixed message length bug in init_response
+ *
+ * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
+ * Fixed rndis_rm_hdr length bug.
+ *
+ * Copyright (C) 2004 by David Brownell
+ * updates to merge with Linux 2.6, better match RNDIS spec
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+#include <linux/netdevice.h>
+
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+#include "u_rndis.h"
+
+#undef VERBOSE_DEBUG
+
+#include "rndis.h"
+
+
+/* The driver for your USB chip needs to support ep0 OUT to work with
+ * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
+ *
+ * Windows hosts need an INF file like Documentation/usb/linux.inf
+ * and will be happier if you provide the host_addr module parameter.
+ */
+
+#if 0
+static int rndis_debug = 0;
+module_param (rndis_debug, int, 0);
+MODULE_PARM_DESC (rndis_debug, "enable debugging");
+#else
+#define rndis_debug 0
+#endif
+
+#define RNDIS_MAX_CONFIGS 1
+
+
+static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
+
+/* Driver Version */
+static const __le32 rndis_driver_version = cpu_to_le32(1);
+
+/* Function Prototypes */
+static rndis_resp_t *rndis_add_response(int configNr, u32 length);
+
+
+/* supported OIDs */
+static const u32 oid_supported_list[] =
+{
+ /* the general stuff */
+ RNDIS_OID_GEN_SUPPORTED_LIST,
+ RNDIS_OID_GEN_HARDWARE_STATUS,
+ RNDIS_OID_GEN_MEDIA_SUPPORTED,
+ RNDIS_OID_GEN_MEDIA_IN_USE,
+ RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
+ RNDIS_OID_GEN_LINK_SPEED,
+ RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
+ RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
+ RNDIS_OID_GEN_VENDOR_ID,
+ RNDIS_OID_GEN_VENDOR_DESCRIPTION,
+ RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
+ RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
+ RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
+ RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
+ RNDIS_OID_GEN_PHYSICAL_MEDIUM,
+
+ /* the statistical stuff */
+ RNDIS_OID_GEN_XMIT_OK,
+ RNDIS_OID_GEN_RCV_OK,
+ RNDIS_OID_GEN_XMIT_ERROR,
+ RNDIS_OID_GEN_RCV_ERROR,
+ RNDIS_OID_GEN_RCV_NO_BUFFER,
+#ifdef RNDIS_OPTIONAL_STATS
+ RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
+ RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
+ RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
+ RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
+ RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
+ RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
+ RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
+ RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
+ RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
+ RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
+ RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
+ RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
+ RNDIS_OID_GEN_RCV_CRC_ERROR,
+ RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
+#endif /* RNDIS_OPTIONAL_STATS */
+
+ /* mandatory 802.3 */
+ /* the general stuff */
+ RNDIS_OID_802_3_PERMANENT_ADDRESS,
+ RNDIS_OID_802_3_CURRENT_ADDRESS,
+ RNDIS_OID_802_3_MULTICAST_LIST,
+ RNDIS_OID_802_3_MAC_OPTIONS,
+ RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
+
+ /* the statistical stuff */
+ RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
+ RNDIS_OID_802_3_XMIT_ONE_COLLISION,
+ RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
+#ifdef RNDIS_OPTIONAL_STATS
+ RNDIS_OID_802_3_XMIT_DEFERRED,
+ RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
+ RNDIS_OID_802_3_RCV_OVERRUN,
+ RNDIS_OID_802_3_XMIT_UNDERRUN,
+ RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
+ RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
+ RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
+#endif /* RNDIS_OPTIONAL_STATS */
+
+#ifdef RNDIS_PM
+ /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
+ * don't say what they mean ... and the NDIS specs are often
+ * confusing and/or ambiguous in this context. (That is, more
+ * so than their specs for the other OIDs.)
+ *
+ * FIXME someone who knows what these should do, please
+ * implement them!
+ */
+
+ /* power management */
+ OID_PNP_CAPABILITIES,
+ OID_PNP_QUERY_POWER,
+ OID_PNP_SET_POWER,
+
+#ifdef RNDIS_WAKEUP
+ /* wake up host */
+ OID_PNP_ENABLE_WAKE_UP,
+ OID_PNP_ADD_WAKE_UP_PATTERN,
+ OID_PNP_REMOVE_WAKE_UP_PATTERN,
+#endif /* RNDIS_WAKEUP */
+#endif /* RNDIS_PM */
+};
+
+
+/* NDIS Functions */
+static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
+ unsigned buf_len, rndis_resp_t *r)
+{
+ int retval = -ENOTSUPP;
+ u32 length = 4; /* usually */
+ __le32 *outbuf;
+ int i, count;
+ rndis_query_cmplt_type *resp;
+ struct net_device *net;
+ struct rtnl_link_stats64 temp;
+ const struct rtnl_link_stats64 *stats;
+
+ if (!r) return -ENOMEM;
+ resp = (rndis_query_cmplt_type *)r->buf;
+
+ if (!resp) return -ENOMEM;
+
+ if (buf_len && rndis_debug > 1) {
+ pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
+ for (i = 0; i < buf_len; i += 16) {
+ pr_debug("%03d: %08x %08x %08x %08x\n", i,
+ get_unaligned_le32(&buf[i]),
+ get_unaligned_le32(&buf[i + 4]),
+ get_unaligned_le32(&buf[i + 8]),
+ get_unaligned_le32(&buf[i + 12]));
+ }
+ }
+
+ /* response goes here, right after the header */
+ outbuf = (__le32 *)&resp[1];
+ resp->InformationBufferOffset = cpu_to_le32(16);
+
+ net = rndis_per_dev_params[configNr].dev;
+ stats = dev_get_stats(net, &temp);
+
+ switch (OID) {
+
+ /* general oids (table 4-1) */
+
+ /* mandatory */
+ case RNDIS_OID_GEN_SUPPORTED_LIST:
+ pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
+ length = sizeof(oid_supported_list);
+ count = length / sizeof(u32);
+ for (i = 0; i < count; i++)
+ outbuf[i] = cpu_to_le32(oid_supported_list[i]);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_HARDWARE_STATUS:
+ pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
+ /* Bogus question!
+ * Hardware must be ready to receive high level protocols.
+ * BTW:
+ * reddite ergo quae sunt Caesaris Caesari
+ * et quae sunt Dei Deo!
+ */
+ *outbuf = cpu_to_le32(0);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_MEDIA_SUPPORTED:
+ pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
+ *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_MEDIA_IN_USE:
+ pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
+ /* one medium, one transport... (maybe you do it better) */
+ *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
+ pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
+ if (rndis_per_dev_params[configNr].dev) {
+ *outbuf = cpu_to_le32(
+ rndis_per_dev_params[configNr].dev->mtu);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_LINK_SPEED:
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
+ if (rndis_per_dev_params[configNr].media_state
+ == RNDIS_MEDIA_STATE_DISCONNECTED)
+ *outbuf = cpu_to_le32(0);
+ else
+ *outbuf = cpu_to_le32(
+ rndis_per_dev_params[configNr].speed);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
+ pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
+ if (rndis_per_dev_params[configNr].dev) {
+ *outbuf = cpu_to_le32(
+ rndis_per_dev_params[configNr].dev->mtu);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
+ pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
+ if (rndis_per_dev_params[configNr].dev) {
+ *outbuf = cpu_to_le32(
+ rndis_per_dev_params[configNr].dev->mtu);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_VENDOR_ID:
+ pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
+ *outbuf = cpu_to_le32(
+ rndis_per_dev_params[configNr].vendorID);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
+ pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
+ if (rndis_per_dev_params[configNr].vendorDescr) {
+ length = strlen(rndis_per_dev_params[configNr].
+ vendorDescr);
+ memcpy(outbuf,
+ rndis_per_dev_params[configNr].vendorDescr,
+ length);
+ } else {
+ outbuf[0] = 0;
+ }
+ retval = 0;
+ break;
+
+ case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
+ pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
+ /* Created as LE */
+ *outbuf = rndis_driver_version;
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
+ pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
+ *outbuf = cpu_to_le32(*rndis_per_dev_params[configNr].filter);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
+ pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
+ *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
+ *outbuf = cpu_to_le32(rndis_per_dev_params[configNr]
+ .media_state);
+ retval = 0;
+ break;
+
+ case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
+ pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
+ *outbuf = cpu_to_le32(0);
+ retval = 0;
+ break;
+
+ /* The RNDIS specification is incomplete/wrong. Some versions
+ * of MS-Windows expect OIDs that aren't specified there. Other
+ * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
+ */
+ case RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */
+ pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
+ *outbuf = cpu_to_le32(
+ RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
+ | RNDIS_MAC_OPTION_FULL_DUPLEX);
+ retval = 0;
+ break;
+
+ /* statistics OIDs (table 4-2) */
+
+ /* mandatory */
+ case RNDIS_OID_GEN_XMIT_OK:
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
+ if (stats) {
+ *outbuf = cpu_to_le32(stats->tx_packets
+ - stats->tx_errors - stats->tx_dropped);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_RCV_OK:
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
+ if (stats) {
+ *outbuf = cpu_to_le32(stats->rx_packets
+ - stats->rx_errors - stats->rx_dropped);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_XMIT_ERROR:
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
+ if (stats) {
+ *outbuf = cpu_to_le32(stats->tx_errors);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_RCV_ERROR:
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
+ if (stats) {
+ *outbuf = cpu_to_le32(stats->rx_errors);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_RCV_NO_BUFFER:
+ pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
+ if (stats) {
+ *outbuf = cpu_to_le32(stats->rx_dropped);
+ retval = 0;
+ }
+ break;
+
+ /* ieee802.3 OIDs (table 4-3) */
+
+ /* mandatory */
+ case RNDIS_OID_802_3_PERMANENT_ADDRESS:
+ pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
+ if (rndis_per_dev_params[configNr].dev) {
+ length = ETH_ALEN;
+ memcpy(outbuf,
+ rndis_per_dev_params[configNr].host_mac,
+ length);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_802_3_CURRENT_ADDRESS:
+ pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
+ if (rndis_per_dev_params[configNr].dev) {
+ length = ETH_ALEN;
+ memcpy(outbuf,
+ rndis_per_dev_params [configNr].host_mac,
+ length);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_802_3_MULTICAST_LIST:
+ pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
+ /* Multicast base address only */
+ *outbuf = cpu_to_le32(0xE0000000);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
+ pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
+ /* Multicast base address only */
+ *outbuf = cpu_to_le32(1);
+ retval = 0;
+ break;
+
+ case RNDIS_OID_802_3_MAC_OPTIONS:
+ pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
+ *outbuf = cpu_to_le32(0);
+ retval = 0;
+ break;
+
+ /* ieee802.3 statistics OIDs (table 4-4) */
+
+ /* mandatory */
+ case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
+ pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
+ if (stats) {
+ *outbuf = cpu_to_le32(stats->rx_frame_errors);
+ retval = 0;
+ }
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
+ pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
+ *outbuf = cpu_to_le32(0);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
+ pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
+ *outbuf = cpu_to_le32(0);
+ retval = 0;
+ break;
+
+ default:
+ pr_warning("%s: query unknown OID 0x%08X\n",
+ __func__, OID);
+ }
+ if (retval < 0)
+ length = 0;
+
+ resp->InformationBufferLength = cpu_to_le32(length);
+ r->length = length + sizeof(*resp);
+ resp->MessageLength = cpu_to_le32(r->length);
+ return retval;
+}
+
+static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
+ rndis_resp_t *r)
+{
+ rndis_set_cmplt_type *resp;
+ int i, retval = -ENOTSUPP;
+ struct rndis_params *params;
+
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_set_cmplt_type *)r->buf;
+ if (!resp)
+ return -ENOMEM;
+
+ if (buf_len && rndis_debug > 1) {
+ pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
+ for (i = 0; i < buf_len; i += 16) {
+ pr_debug("%03d: %08x %08x %08x %08x\n", i,
+ get_unaligned_le32(&buf[i]),
+ get_unaligned_le32(&buf[i + 4]),
+ get_unaligned_le32(&buf[i + 8]),
+ get_unaligned_le32(&buf[i + 12]));
+ }
+ }
+
+ params = &rndis_per_dev_params[configNr];
+ switch (OID) {
+ case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
+
+ /* these NDIS_PACKET_TYPE_* bitflags are shared with
+ * cdc_filter; it's not RNDIS-specific
+ * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
+ * PROMISCUOUS, DIRECTED,
+ * MULTICAST, ALL_MULTICAST, BROADCAST
+ */
+ *params->filter = (u16)get_unaligned_le32(buf);
+ pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
+ __func__, *params->filter);
+
+ /* this call has a significant side effect: it's
+ * what makes the packet flow start and stop, like
+ * activating the CDC Ethernet altsetting.
+ */
+ retval = 0;
+ if (*params->filter) {
+ params->state = RNDIS_DATA_INITIALIZED;
+ netif_carrier_on(params->dev);
+ if (netif_running(params->dev))
+ netif_wake_queue(params->dev);
+ } else {
+ params->state = RNDIS_INITIALIZED;
+ netif_carrier_off(params->dev);
+ netif_stop_queue(params->dev);
+ }
+ break;
+
+ case RNDIS_OID_802_3_MULTICAST_LIST:
+ /* I think we can ignore this */
+ pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
+ retval = 0;
+ break;
+
+ default:
+ pr_warning("%s: set unknown OID 0x%08X, size %d\n",
+ __func__, OID, buf_len);
+ }
+
+ return retval;
+}
+
+/*
+ * Response Functions
+ */
+
+static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
+{
+ rndis_init_cmplt_type *resp;
+ rndis_resp_t *r;
+ struct rndis_params *params = rndis_per_dev_params + configNr;
+
+ if (!params->dev)
+ return -ENOTSUPP;
+
+ r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type));
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_init_cmplt_type *)r->buf;
+
+ resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
+ resp->MessageLength = cpu_to_le32(52);
+ resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+ resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+ resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
+ resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
+ resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
+ resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
+ resp->MaxPacketsPerTransfer = cpu_to_le32(1);
+ resp->MaxTransferSize = cpu_to_le32(
+ params->dev->mtu
+ + sizeof(struct ethhdr)
+ + sizeof(struct rndis_packet_msg_type)
+ + 22);
+ resp->PacketAlignmentFactor = cpu_to_le32(0);
+ resp->AFListOffset = cpu_to_le32(0);
+ resp->AFListSize = cpu_to_le32(0);
+
+ params->resp_avail(params->v);
+ return 0;
+}
+
+static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
+{
+ rndis_query_cmplt_type *resp;
+ rndis_resp_t *r;
+ struct rndis_params *params = rndis_per_dev_params + configNr;
+
+ /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
+ if (!params->dev)
+ return -ENOTSUPP;
+
+ /*
+ * we need more memory:
+ * gen_ndis_query_resp expects enough space for
+ * rndis_query_cmplt_type followed by data.
+ * oid_supported_list is the largest data reply
+ */
+ r = rndis_add_response(configNr,
+ sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_query_cmplt_type *)r->buf;
+
+ resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
+ resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+
+ if (gen_ndis_query_resp(configNr, le32_to_cpu(buf->OID),
+ le32_to_cpu(buf->InformationBufferOffset)
+ + 8 + (u8 *)buf,
+ le32_to_cpu(buf->InformationBufferLength),
+ r)) {
+ /* OID not supported */
+ resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
+ resp->MessageLength = cpu_to_le32(sizeof *resp);
+ resp->InformationBufferLength = cpu_to_le32(0);
+ resp->InformationBufferOffset = cpu_to_le32(0);
+ } else
+ resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+
+ params->resp_avail(params->v);
+ return 0;
+}
+
+static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
+{
+ u32 BufLength, BufOffset;
+ rndis_set_cmplt_type *resp;
+ rndis_resp_t *r;
+ struct rndis_params *params = rndis_per_dev_params + configNr;
+
+ r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type));
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_set_cmplt_type *)r->buf;
+
+ BufLength = le32_to_cpu(buf->InformationBufferLength);
+ BufOffset = le32_to_cpu(buf->InformationBufferOffset);
+
+#ifdef VERBOSE_DEBUG
+ pr_debug("%s: Length: %d\n", __func__, BufLength);
+ pr_debug("%s: Offset: %d\n", __func__, BufOffset);
+ pr_debug("%s: InfoBuffer: ", __func__);
+
+ for (i = 0; i < BufLength; i++) {
+ pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
+ }
+
+ pr_debug("\n");
+#endif
+
+ resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
+ resp->MessageLength = cpu_to_le32(16);
+ resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+ if (gen_ndis_set_resp(configNr, le32_to_cpu(buf->OID),
+ ((u8 *)buf) + 8 + BufOffset, BufLength, r))
+ resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
+ else
+ resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+
+ params->resp_avail(params->v);
+ return 0;
+}
+
+static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
+{
+ rndis_reset_cmplt_type *resp;
+ rndis_resp_t *r;
+ struct rndis_params *params = rndis_per_dev_params + configNr;
+
+ r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_reset_cmplt_type *)r->buf;
+
+ resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
+ resp->MessageLength = cpu_to_le32(16);
+ resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+ /* resent information */
+ resp->AddressingReset = cpu_to_le32(1);
+
+ params->resp_avail(params->v);
+ return 0;
+}
+
+static int rndis_keepalive_response(int configNr,
+ rndis_keepalive_msg_type *buf)
+{
+ rndis_keepalive_cmplt_type *resp;
+ rndis_resp_t *r;
+ struct rndis_params *params = rndis_per_dev_params + configNr;
+
+ /* host "should" check only in RNDIS_DATA_INITIALIZED state */
+
+ r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type));
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_keepalive_cmplt_type *)r->buf;
+
+ resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
+ resp->MessageLength = cpu_to_le32(16);
+ resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+ resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+
+ params->resp_avail(params->v);
+ return 0;
+}
+
+
+/*
+ * Device to Host Comunication
+ */
+static int rndis_indicate_status_msg(int configNr, u32 status)
+{
+ rndis_indicate_status_msg_type *resp;
+ rndis_resp_t *r;
+ struct rndis_params *params = rndis_per_dev_params + configNr;
+
+ if (params->state == RNDIS_UNINITIALIZED)
+ return -ENOTSUPP;
+
+ r = rndis_add_response(configNr,
+ sizeof(rndis_indicate_status_msg_type));
+ if (!r)
+ return -ENOMEM;
+ resp = (rndis_indicate_status_msg_type *)r->buf;
+
+ resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
+ resp->MessageLength = cpu_to_le32(20);
+ resp->Status = cpu_to_le32(status);
+ resp->StatusBufferLength = cpu_to_le32(0);
+ resp->StatusBufferOffset = cpu_to_le32(0);
+
+ params->resp_avail(params->v);
+ return 0;
+}
+
+int rndis_signal_connect(int configNr)
+{
+ rndis_per_dev_params[configNr].media_state
+ = RNDIS_MEDIA_STATE_CONNECTED;
+ return rndis_indicate_status_msg(configNr,
+ RNDIS_STATUS_MEDIA_CONNECT);
+}
+EXPORT_SYMBOL_GPL(rndis_signal_connect);
+
+int rndis_signal_disconnect(int configNr)
+{
+ rndis_per_dev_params[configNr].media_state
+ = RNDIS_MEDIA_STATE_DISCONNECTED;
+ return rndis_indicate_status_msg(configNr,
+ RNDIS_STATUS_MEDIA_DISCONNECT);
+}
+EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
+
+void rndis_uninit(int configNr)
+{
+ u8 *buf;
+ u32 length;
+
+ if (configNr >= RNDIS_MAX_CONFIGS)
+ return;
+ rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED;
+
+ /* drain the response queue */
+ while ((buf = rndis_get_next_response(configNr, &length)))
+ rndis_free_response(configNr, buf);
+}
+EXPORT_SYMBOL_GPL(rndis_uninit);
+
+void rndis_set_host_mac(int configNr, const u8 *addr)
+{
+ rndis_per_dev_params[configNr].host_mac = addr;
+}
+EXPORT_SYMBOL_GPL(rndis_set_host_mac);
+
+/*
+ * Message Parser
+ */
+int rndis_msg_parser(u8 configNr, u8 *buf)
+{
+ u32 MsgType, MsgLength;
+ __le32 *tmp;
+ struct rndis_params *params;
+
+ if (!buf)
+ return -ENOMEM;
+
+ tmp = (__le32 *)buf;
+ MsgType = get_unaligned_le32(tmp++);
+ MsgLength = get_unaligned_le32(tmp++);
+
+ if (configNr >= RNDIS_MAX_CONFIGS)
+ return -ENOTSUPP;
+ params = &rndis_per_dev_params[configNr];
+
+ /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
+ * rx/tx statistics and link status, in addition to KEEPALIVE traffic
+ * and normal HC level polling to see if there's any IN traffic.
+ */
+
+ /* For USB: responses may take up to 10 seconds */
+ switch (MsgType) {
+ case RNDIS_MSG_INIT:
+ pr_debug("%s: RNDIS_MSG_INIT\n",
+ __func__);
+ params->state = RNDIS_INITIALIZED;
+ return rndis_init_response(configNr,
+ (rndis_init_msg_type *)buf);
+
+ case RNDIS_MSG_HALT:
+ pr_debug("%s: RNDIS_MSG_HALT\n",
+ __func__);
+ params->state = RNDIS_UNINITIALIZED;
+ if (params->dev) {
+ netif_carrier_off(params->dev);
+ netif_stop_queue(params->dev);
+ }
+ return 0;
+
+ case RNDIS_MSG_QUERY:
+ return rndis_query_response(configNr,
+ (rndis_query_msg_type *)buf);
+
+ case RNDIS_MSG_SET:
+ return rndis_set_response(configNr,
+ (rndis_set_msg_type *)buf);
+
+ case RNDIS_MSG_RESET:
+ pr_debug("%s: RNDIS_MSG_RESET\n",
+ __func__);
+ return rndis_reset_response(configNr,
+ (rndis_reset_msg_type *)buf);
+
+ case RNDIS_MSG_KEEPALIVE:
+ /* For USB: host does this every 5 seconds */
+ if (rndis_debug > 1)
+ pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
+ __func__);
+ return rndis_keepalive_response(configNr,
+ (rndis_keepalive_msg_type *)
+ buf);
+
+ default:
+ /* At least Windows XP emits some undefined RNDIS messages.
+ * In one case those messages seemed to relate to the host
+ * suspending itself.
+ */
+ pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
+ __func__, MsgType, MsgLength);
+ print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
+ buf, MsgLength);
+ break;
+ }
+
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(rndis_msg_parser);
+
+int rndis_register(void (*resp_avail)(void *v), void *v)
+{
+ u8 i;
+
+ if (!resp_avail)
+ return -EINVAL;
+
+ for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
+ if (!rndis_per_dev_params[i].used) {
+ rndis_per_dev_params[i].used = 1;
+ rndis_per_dev_params[i].resp_avail = resp_avail;
+ rndis_per_dev_params[i].v = v;
+ pr_debug("%s: configNr = %d\n", __func__, i);
+ return i;
+ }
+ }
+ pr_debug("failed\n");
+
+ return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(rndis_register);
+
+void rndis_deregister(int configNr)
+{
+ pr_debug("%s:\n", __func__);
+
+ if (configNr >= RNDIS_MAX_CONFIGS) return;
+ rndis_per_dev_params[configNr].used = 0;
+}
+EXPORT_SYMBOL_GPL(rndis_deregister);
+
+int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
+{
+ pr_debug("%s:\n", __func__);
+ if (!dev)
+ return -EINVAL;
+ if (configNr >= RNDIS_MAX_CONFIGS) return -1;
+
+ rndis_per_dev_params[configNr].dev = dev;
+ rndis_per_dev_params[configNr].filter = cdc_filter;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_set_param_dev);
+
+int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
+{
+ pr_debug("%s:\n", __func__);
+ if (!vendorDescr) return -1;
+ if (configNr >= RNDIS_MAX_CONFIGS) return -1;
+
+ rndis_per_dev_params[configNr].vendorID = vendorID;
+ rndis_per_dev_params[configNr].vendorDescr = vendorDescr;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
+
+int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
+{
+ pr_debug("%s: %u %u\n", __func__, medium, speed);
+ if (configNr >= RNDIS_MAX_CONFIGS) return -1;
+
+ rndis_per_dev_params[configNr].medium = medium;
+ rndis_per_dev_params[configNr].speed = speed;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_set_param_medium);
+
+void rndis_add_hdr(struct sk_buff *skb)
+{
+ struct rndis_packet_msg_type *header;
+
+ if (!skb)
+ return;
+ header = (void *)skb_push(skb, sizeof(*header));
+ memset(header, 0, sizeof *header);
+ header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
+ header->MessageLength = cpu_to_le32(skb->len);
+ header->DataOffset = cpu_to_le32(36);
+ header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
+}
+EXPORT_SYMBOL_GPL(rndis_add_hdr);
+
+void rndis_free_response(int configNr, u8 *buf)
+{
+ rndis_resp_t *r;
+ struct list_head *act, *tmp;
+
+ list_for_each_safe(act, tmp,
+ &(rndis_per_dev_params[configNr].resp_queue))
+ {
+ r = list_entry(act, rndis_resp_t, list);
+ if (r && r->buf == buf) {
+ list_del(&r->list);
+ kfree(r);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(rndis_free_response);
+
+u8 *rndis_get_next_response(int configNr, u32 *length)
+{
+ rndis_resp_t *r;
+ struct list_head *act, *tmp;
+
+ if (!length) return NULL;
+
+ list_for_each_safe(act, tmp,
+ &(rndis_per_dev_params[configNr].resp_queue))
+ {
+ r = list_entry(act, rndis_resp_t, list);
+ if (!r->send) {
+ r->send = 1;
+ *length = r->length;
+ return r->buf;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(rndis_get_next_response);
+
+static rndis_resp_t *rndis_add_response(int configNr, u32 length)
+{
+ rndis_resp_t *r;
+
+ /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
+ r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
+ if (!r) return NULL;
+
+ r->buf = (u8 *)(r + 1);
+ r->length = length;
+ r->send = 0;
+
+ list_add_tail(&r->list,
+ &(rndis_per_dev_params[configNr].resp_queue));
+ return r;
+}
+
+int rndis_rm_hdr(struct gether *port,
+ struct sk_buff *skb,
+ struct sk_buff_head *list)
+{
+ /* tmp points to a struct rndis_packet_msg_type */
+ __le32 *tmp = (void *)skb->data;
+
+ /* MessageType, MessageLength */
+ if (cpu_to_le32(RNDIS_MSG_PACKET)
+ != get_unaligned(tmp++)) {
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+ tmp++;
+
+ /* DataOffset, DataLength */
+ if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
+ dev_kfree_skb_any(skb);
+ return -EOVERFLOW;
+ }
+ skb_trim(skb, get_unaligned_le32(tmp++));
+
+ skb_queue_tail(list, skb);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_rm_hdr);
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static int rndis_proc_show(struct seq_file *m, void *v)
+{
+ rndis_params *param = m->private;
+
+ seq_printf(m,
+ "Config Nr. %d\n"
+ "used : %s\n"
+ "state : %s\n"
+ "medium : 0x%08X\n"
+ "speed : %d\n"
+ "cable : %s\n"
+ "vendor ID : 0x%08X\n"
+ "vendor : %s\n",
+ param->confignr, (param->used) ? "y" : "n",
+ ({ char *s = "?";
+ switch (param->state) {
+ case RNDIS_UNINITIALIZED:
+ s = "RNDIS_UNINITIALIZED"; break;
+ case RNDIS_INITIALIZED:
+ s = "RNDIS_INITIALIZED"; break;
+ case RNDIS_DATA_INITIALIZED:
+ s = "RNDIS_DATA_INITIALIZED"; break;
+ } s; }),
+ param->medium,
+ (param->media_state) ? 0 : param->speed*100,
+ (param->media_state) ? "disconnected" : "connected",
+ param->vendorID, param->vendorDescr);
+ return 0;
+}
+
+static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ rndis_params *p = PDE_DATA(file_inode(file));
+ u32 speed = 0;
+ int i, fl_speed = 0;
+
+ for (i = 0; i < count; i++) {
+ char c;
+ if (get_user(c, buffer))
+ return -EFAULT;
+ switch (c) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ fl_speed = 1;
+ speed = speed * 10 + c - '0';
+ break;
+ case 'C':
+ case 'c':
+ rndis_signal_connect(p->confignr);
+ break;
+ case 'D':
+ case 'd':
+ rndis_signal_disconnect(p->confignr);
+ break;
+ default:
+ if (fl_speed) p->speed = speed;
+ else pr_debug("%c is not valid\n", c);
+ break;
+ }
+
+ buffer++;
+ }
+
+ return count;
+}
+
+static int rndis_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rndis_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations rndis_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = rndis_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = rndis_proc_write,
+};
+
+#define NAME_TEMPLATE "driver/rndis-%03d"
+
+static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+
+int rndis_init(void)
+{
+ u8 i;
+
+ for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+ char name [20];
+
+ sprintf(name, NAME_TEMPLATE, i);
+ rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
+ &rndis_proc_fops,
+ (void *)(rndis_per_dev_params + i));
+ if (!rndis_connect_state[i]) {
+ pr_debug("%s: remove entries", __func__);
+ while (i) {
+ sprintf(name, NAME_TEMPLATE, --i);
+ remove_proc_entry(name, NULL);
+ }
+ pr_debug("\n");
+ return -EIO;
+ }
+#endif
+ rndis_per_dev_params[i].confignr = i;
+ rndis_per_dev_params[i].used = 0;
+ rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED;
+ rndis_per_dev_params[i].media_state
+ = RNDIS_MEDIA_STATE_DISCONNECTED;
+ INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue));
+ }
+
+ return 0;
+}
+
+void rndis_exit(void)
+{
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+ u8 i;
+ char name[20];
+
+ for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
+ sprintf(name, NAME_TEMPLATE, i);
+ remove_proc_entry(name, NULL);
+ }
+#endif
+}
+
--- /dev/null
+/*
+ * RNDIS Definitions for Remote NDIS
+ *
+ * Authors: Benedikt Spranger, Pengutronix
+ * Robert Schwebel, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This software was originally developed in conformance with
+ * Microsoft's Remote NDIS Specification License Agreement.
+ */
+
+#ifndef _LINUX_RNDIS_H
+#define _LINUX_RNDIS_H
+
+#include <linux/rndis.h>
+#include "u_ether.h"
+#include "ndis.h"
+
+#define RNDIS_MAXIMUM_FRAME_SIZE 1518
+#define RNDIS_MAX_TOTAL_SIZE 1558
+
+typedef struct rndis_init_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 MajorVersion;
+ __le32 MinorVersion;
+ __le32 MaxTransferSize;
+} rndis_init_msg_type;
+
+typedef struct rndis_init_cmplt_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 Status;
+ __le32 MajorVersion;
+ __le32 MinorVersion;
+ __le32 DeviceFlags;
+ __le32 Medium;
+ __le32 MaxPacketsPerTransfer;
+ __le32 MaxTransferSize;
+ __le32 PacketAlignmentFactor;
+ __le32 AFListOffset;
+ __le32 AFListSize;
+} rndis_init_cmplt_type;
+
+typedef struct rndis_halt_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+} rndis_halt_msg_type;
+
+typedef struct rndis_query_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 OID;
+ __le32 InformationBufferLength;
+ __le32 InformationBufferOffset;
+ __le32 DeviceVcHandle;
+} rndis_query_msg_type;
+
+typedef struct rndis_query_cmplt_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 Status;
+ __le32 InformationBufferLength;
+ __le32 InformationBufferOffset;
+} rndis_query_cmplt_type;
+
+typedef struct rndis_set_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 OID;
+ __le32 InformationBufferLength;
+ __le32 InformationBufferOffset;
+ __le32 DeviceVcHandle;
+} rndis_set_msg_type;
+
+typedef struct rndis_set_cmplt_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 Status;
+} rndis_set_cmplt_type;
+
+typedef struct rndis_reset_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 Reserved;
+} rndis_reset_msg_type;
+
+typedef struct rndis_reset_cmplt_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 Status;
+ __le32 AddressingReset;
+} rndis_reset_cmplt_type;
+
+typedef struct rndis_indicate_status_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 Status;
+ __le32 StatusBufferLength;
+ __le32 StatusBufferOffset;
+} rndis_indicate_status_msg_type;
+
+typedef struct rndis_keepalive_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+} rndis_keepalive_msg_type;
+
+typedef struct rndis_keepalive_cmplt_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 RequestID;
+ __le32 Status;
+} rndis_keepalive_cmplt_type;
+
+struct rndis_packet_msg_type
+{
+ __le32 MessageType;
+ __le32 MessageLength;
+ __le32 DataOffset;
+ __le32 DataLength;
+ __le32 OOBDataOffset;
+ __le32 OOBDataLength;
+ __le32 NumOOBDataElements;
+ __le32 PerPacketInfoOffset;
+ __le32 PerPacketInfoLength;
+ __le32 VcHandle;
+ __le32 Reserved;
+} __attribute__ ((packed));
+
+struct rndis_config_parameter
+{
+ __le32 ParameterNameOffset;
+ __le32 ParameterNameLength;
+ __le32 ParameterType;
+ __le32 ParameterValueOffset;
+ __le32 ParameterValueLength;
+};
+
+/* implementation specific */
+enum rndis_state
+{
+ RNDIS_UNINITIALIZED,
+ RNDIS_INITIALIZED,
+ RNDIS_DATA_INITIALIZED,
+};
+
+typedef struct rndis_resp_t
+{
+ struct list_head list;
+ u8 *buf;
+ u32 length;
+ int send;
+} rndis_resp_t;
+
+typedef struct rndis_params
+{
+ u8 confignr;
+ u8 used;
+ u16 saved_filter;
+ enum rndis_state state;
+ u32 medium;
+ u32 speed;
+ u32 media_state;
+
+ const u8 *host_mac;
+ u16 *filter;
+ struct net_device *dev;
+
+ u32 vendorID;
+ const char *vendorDescr;
+ void (*resp_avail)(void *v);
+ void *v;
+ struct list_head resp_queue;
+} rndis_params;
+
+/* RNDIS Message parser and other useless functions */
+int rndis_msg_parser (u8 configNr, u8 *buf);
+int rndis_register(void (*resp_avail)(void *v), void *v);
+void rndis_deregister (int configNr);
+int rndis_set_param_dev (u8 configNr, struct net_device *dev,
+ u16 *cdc_filter);
+int rndis_set_param_vendor (u8 configNr, u32 vendorID,
+ const char *vendorDescr);
+int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
+void rndis_add_hdr (struct sk_buff *skb);
+int rndis_rm_hdr(struct gether *port, struct sk_buff *skb,
+ struct sk_buff_head *list);
+u8 *rndis_get_next_response (int configNr, u32 *length);
+void rndis_free_response (int configNr, u8 *buf);
+
+void rndis_uninit (int configNr);
+int rndis_signal_connect (int configNr);
+int rndis_signal_disconnect (int configNr);
+int rndis_state (int configNr);
+extern void rndis_set_host_mac (int configNr, const u8 *addr);
+
+#endif /* _LINUX_RNDIS_H */
--- /dev/null
+/*
+ * storage_common.c -- Common definitions for mass storage functionality
+ *
+ * Copyright (C) 2003-2008 Alan Stern
+ * Copyeight (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz (mina86@mina86.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/*
+ * This file requires the following identifiers used in USB strings to
+ * be defined (each of type pointer to char):
+ * - fsg_string_interface -- name of the interface
+ */
+
+/*
+ * When USB_GADGET_DEBUG_FILES is defined the module param num_buffers
+ * sets the number of pipeline buffers (length of the fsg_buffhd array).
+ * The valid range of num_buffers is: num >= 2 && num <= 4.
+ */
+
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/usb/composite.h>
+
+#include "storage_common.h"
+
+/* There is only one interface. */
+
+struct usb_interface_descriptor fsg_intf_desc = {
+ .bLength = sizeof fsg_intf_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bNumEndpoints = 2, /* Adjusted during fsg_bind() */
+ .bInterfaceClass = USB_CLASS_MASS_STORAGE,
+ .bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
+ .bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
+ .iInterface = FSG_STRING_INTERFACE,
+};
+EXPORT_SYMBOL_GPL(fsg_intf_desc);
+
+/*
+ * Three full-speed endpoint descriptors: bulk-in, bulk-out, and
+ * interrupt-in.
+ */
+
+struct usb_endpoint_descriptor fsg_fs_bulk_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ /* wMaxPacketSize set by autoconfiguration */
+};
+EXPORT_SYMBOL_GPL(fsg_fs_bulk_in_desc);
+
+struct usb_endpoint_descriptor fsg_fs_bulk_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ /* wMaxPacketSize set by autoconfiguration */
+};
+EXPORT_SYMBOL_GPL(fsg_fs_bulk_out_desc);
+
+struct usb_descriptor_header *fsg_fs_function[] = {
+ (struct usb_descriptor_header *) &fsg_intf_desc,
+ (struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
+ (struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
+ NULL,
+};
+EXPORT_SYMBOL_GPL(fsg_fs_function);
+
+
+/*
+ * USB 2.0 devices need to expose both high speed and full speed
+ * descriptors, unless they only run at full speed.
+ *
+ * That means alternate endpoint descriptors (bigger packets)
+ * and a "device qualifier" ... plus more construction options
+ * for the configuration descriptor.
+ */
+struct usb_endpoint_descriptor fsg_hs_bulk_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+EXPORT_SYMBOL_GPL(fsg_hs_bulk_in_desc);
+
+struct usb_endpoint_descriptor fsg_hs_bulk_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+ .bInterval = 1, /* NAK every 1 uframe */
+};
+EXPORT_SYMBOL_GPL(fsg_hs_bulk_out_desc);
+
+
+struct usb_descriptor_header *fsg_hs_function[] = {
+ (struct usb_descriptor_header *) &fsg_intf_desc,
+ (struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
+ (struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
+ NULL,
+};
+EXPORT_SYMBOL_GPL(fsg_hs_function);
+
+struct usb_endpoint_descriptor fsg_ss_bulk_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_in_desc);
+
+struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc = {
+ .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /*.bMaxBurst = DYNAMIC, */
+};
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_in_comp_desc);
+
+struct usb_endpoint_descriptor fsg_ss_bulk_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_desc);
+
+struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
+ .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /*.bMaxBurst = DYNAMIC, */
+};
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_comp_desc);
+
+struct usb_descriptor_header *fsg_ss_function[] = {
+ (struct usb_descriptor_header *) &fsg_intf_desc,
+ (struct usb_descriptor_header *) &fsg_ss_bulk_in_desc,
+ (struct usb_descriptor_header *) &fsg_ss_bulk_in_comp_desc,
+ (struct usb_descriptor_header *) &fsg_ss_bulk_out_desc,
+ (struct usb_descriptor_header *) &fsg_ss_bulk_out_comp_desc,
+ NULL,
+};
+EXPORT_SYMBOL_GPL(fsg_ss_function);
+
+
+ /*-------------------------------------------------------------------------*/
+
+/*
+ * If the next two routines are called while the gadget is registered,
+ * the caller must own fsg->filesem for writing.
+ */
+
+void fsg_lun_close(struct fsg_lun *curlun)
+{
+ if (curlun->filp) {
+ LDBG(curlun, "close backing file\n");
+ fput(curlun->filp);
+ curlun->filp = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(fsg_lun_close);
+
+int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
+{
+ int ro;
+ struct file *filp = NULL;
+ int rc = -EINVAL;
+ struct inode *inode = NULL;
+ loff_t size;
+ loff_t num_sectors;
+ loff_t min_sectors;
+ unsigned int blkbits;
+ unsigned int blksize;
+
+ /* R/W if we can, R/O if we must */
+ ro = curlun->initially_ro;
+ if (!ro) {
+ filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
+ if (PTR_ERR(filp) == -EROFS || PTR_ERR(filp) == -EACCES)
+ ro = 1;
+ }
+ if (ro)
+ filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
+ if (IS_ERR(filp)) {
+ LINFO(curlun, "unable to open backing file: %s\n", filename);
+ return PTR_ERR(filp);
+ }
+
+ if (!(filp->f_mode & FMODE_WRITE))
+ ro = 1;
+
+ inode = file_inode(filp);
+ if ((!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))) {
+ LINFO(curlun, "invalid file type: %s\n", filename);
+ goto out;
+ }
+
+ /*
+ * If we can't read the file, it's no good.
+ * If we can't write the file, use it read-only.
+ */
+ if (!(filp->f_mode & FMODE_CAN_READ)) {
+ LINFO(curlun, "file not readable: %s\n", filename);
+ goto out;
+ }
+ if (!(filp->f_mode & FMODE_CAN_WRITE))
+ ro = 1;
+
+ size = i_size_read(inode->i_mapping->host);
+ if (size < 0) {
+ LINFO(curlun, "unable to find file size: %s\n", filename);
+ rc = (int) size;
+ goto out;
+ }
+
+ if (curlun->cdrom) {
+ blksize = 2048;
+ blkbits = 11;
+ } else if (inode->i_bdev) {
+ blksize = bdev_logical_block_size(inode->i_bdev);
+ blkbits = blksize_bits(blksize);
+ } else {
+ blksize = 512;
+ blkbits = 9;
+ }
+
+ num_sectors = size >> blkbits; /* File size in logic-block-size blocks */
+ min_sectors = 1;
+ if (curlun->cdrom) {
+ min_sectors = 300; /* Smallest track is 300 frames */
+ if (num_sectors >= 256*60*75) {
+ num_sectors = 256*60*75 - 1;
+ LINFO(curlun, "file too big: %s\n", filename);
+ LINFO(curlun, "using only first %d blocks\n",
+ (int) num_sectors);
+ }
+ }
+ if (num_sectors < min_sectors) {
+ LINFO(curlun, "file too small: %s\n", filename);
+ rc = -ETOOSMALL;
+ goto out;
+ }
+
+ if (fsg_lun_is_open(curlun))
+ fsg_lun_close(curlun);
+
+ curlun->blksize = blksize;
+ curlun->blkbits = blkbits;
+ curlun->ro = ro;
+ curlun->filp = filp;
+ curlun->file_length = size;
+ curlun->num_sectors = num_sectors;
+ LDBG(curlun, "open backing file: %s\n", filename);
+ return 0;
+
+out:
+ fput(filp);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fsg_lun_open);
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Sync the file data, don't bother with the metadata.
+ * This code was copied from fs/buffer.c:sys_fdatasync().
+ */
+int fsg_lun_fsync_sub(struct fsg_lun *curlun)
+{
+ struct file *filp = curlun->filp;
+
+ if (curlun->ro || !filp)
+ return 0;
+ return vfs_fsync(filp, 1);
+}
+EXPORT_SYMBOL_GPL(fsg_lun_fsync_sub);
+
+void store_cdrom_address(u8 *dest, int msf, u32 addr)
+{
+ if (msf) {
+ /* Convert to Minutes-Seconds-Frames */
+ addr >>= 2; /* Convert to 2048-byte frames */
+ addr += 2*75; /* Lead-in occupies 2 seconds */
+ dest[3] = addr % 75; /* Frames */
+ addr /= 75;
+ dest[2] = addr % 60; /* Seconds */
+ addr /= 60;
+ dest[1] = addr; /* Minutes */
+ dest[0] = 0; /* Reserved */
+ } else {
+ /* Absolute sector */
+ put_unaligned_be32(addr, dest);
+ }
+}
+EXPORT_SYMBOL_GPL(store_cdrom_address);
+
+/*-------------------------------------------------------------------------*/
+
+
+ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf)
+{
+ return sprintf(buf, "%d\n", fsg_lun_is_open(curlun)
+ ? curlun->ro
+ : curlun->initially_ro);
+}
+EXPORT_SYMBOL_GPL(fsg_show_ro);
+
+ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf)
+{
+ return sprintf(buf, "%u\n", curlun->nofua);
+}
+EXPORT_SYMBOL_GPL(fsg_show_nofua);
+
+ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ char *buf)
+{
+ char *p;
+ ssize_t rc;
+
+ down_read(filesem);
+ if (fsg_lun_is_open(curlun)) { /* Get the complete pathname */
+ p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
+ if (IS_ERR(p))
+ rc = PTR_ERR(p);
+ else {
+ rc = strlen(p);
+ memmove(buf, p, rc);
+ buf[rc] = '\n'; /* Add a newline */
+ buf[++rc] = 0;
+ }
+ } else { /* No file, return 0 bytes */
+ *buf = 0;
+ rc = 0;
+ }
+ up_read(filesem);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fsg_show_file);
+
+ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf)
+{
+ return sprintf(buf, "%u\n", curlun->cdrom);
+}
+EXPORT_SYMBOL_GPL(fsg_show_cdrom);
+
+ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf)
+{
+ return sprintf(buf, "%u\n", curlun->removable);
+}
+EXPORT_SYMBOL_GPL(fsg_show_removable);
+
+/*
+ * The caller must hold fsg->filesem for reading when calling this function.
+ */
+static ssize_t _fsg_store_ro(struct fsg_lun *curlun, bool ro)
+{
+ if (fsg_lun_is_open(curlun)) {
+ LDBG(curlun, "read-only status change prevented\n");
+ return -EBUSY;
+ }
+
+ curlun->ro = ro;
+ curlun->initially_ro = ro;
+ LDBG(curlun, "read-only status set to %d\n", curlun->ro);
+
+ return 0;
+}
+
+ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ const char *buf, size_t count)
+{
+ ssize_t rc;
+ bool ro;
+
+ rc = strtobool(buf, &ro);
+ if (rc)
+ return rc;
+
+ /*
+ * Allow the write-enable status to change only while the
+ * backing file is closed.
+ */
+ down_read(filesem);
+ rc = _fsg_store_ro(curlun, ro);
+ if (!rc)
+ rc = count;
+ up_read(filesem);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fsg_store_ro);
+
+ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count)
+{
+ bool nofua;
+ int ret;
+
+ ret = strtobool(buf, &nofua);
+ if (ret)
+ return ret;
+
+ /* Sync data when switching from async mode to sync */
+ if (!nofua && curlun->nofua)
+ fsg_lun_fsync_sub(curlun);
+
+ curlun->nofua = nofua;
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(fsg_store_nofua);
+
+ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ const char *buf, size_t count)
+{
+ int rc = 0;
+
+ if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {
+ LDBG(curlun, "eject attempt prevented\n");
+ return -EBUSY; /* "Door is locked" */
+ }
+
+ /* Remove a trailing newline */
+ if (count > 0 && buf[count-1] == '\n')
+ ((char *) buf)[count-1] = 0; /* Ugh! */
+
+ /* Load new medium */
+ down_write(filesem);
+ if (count > 0 && buf[0]) {
+ /* fsg_lun_open() will close existing file if any. */
+ rc = fsg_lun_open(curlun, buf);
+ if (rc == 0)
+ curlun->unit_attention_data =
+ SS_NOT_READY_TO_READY_TRANSITION;
+ } else if (fsg_lun_is_open(curlun)) {
+ fsg_lun_close(curlun);
+ curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
+ }
+ up_write(filesem);
+ return (rc < 0 ? rc : count);
+}
+EXPORT_SYMBOL_GPL(fsg_store_file);
+
+ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ const char *buf, size_t count)
+{
+ bool cdrom;
+ int ret;
+
+ ret = strtobool(buf, &cdrom);
+ if (ret)
+ return ret;
+
+ down_read(filesem);
+ ret = cdrom ? _fsg_store_ro(curlun, true) : 0;
+
+ if (!ret) {
+ curlun->cdrom = cdrom;
+ ret = count;
+ }
+ up_read(filesem);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(fsg_store_cdrom);
+
+ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
+ size_t count)
+{
+ bool removable;
+ int ret;
+
+ ret = strtobool(buf, &removable);
+ if (ret)
+ return ret;
+
+ curlun->removable = removable;
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(fsg_store_removable);
+
+MODULE_LICENSE("GPL");
--- /dev/null
+#ifndef USB_STORAGE_COMMON_H
+#define USB_STORAGE_COMMON_H
+
+#include <linux/device.h>
+#include <linux/usb/storage.h>
+#include <scsi/scsi.h>
+#include <asm/unaligned.h>
+
+#ifndef DEBUG
+#undef VERBOSE_DEBUG
+#undef DUMP_MSGS
+#endif /* !DEBUG */
+
+#ifdef VERBOSE_DEBUG
+#define VLDBG LDBG
+#else
+#define VLDBG(lun, fmt, args...) do { } while (0)
+#endif /* VERBOSE_DEBUG */
+
+#define _LMSG(func, lun, fmt, args...) \
+ do { \
+ if ((lun)->name_pfx && *(lun)->name_pfx) \
+ func("%s/%s: " fmt, *(lun)->name_pfx, \
+ (lun)->name, ## args); \
+ else \
+ func("%s: " fmt, (lun)->name, ## args); \
+ } while (0)
+
+#define LDBG(lun, fmt, args...) _LMSG(pr_debug, lun, fmt, ## args)
+#define LERROR(lun, fmt, args...) _LMSG(pr_err, lun, fmt, ## args)
+#define LWARN(lun, fmt, args...) _LMSG(pr_warn, lun, fmt, ## args)
+#define LINFO(lun, fmt, args...) _LMSG(pr_info, lun, fmt, ## args)
+
+
+#ifdef DUMP_MSGS
+
+# define dump_msg(fsg, /* const char * */ label, \
+ /* const u8 * */ buf, /* unsigned */ length) \
+do { \
+ if (length < 512) { \
+ DBG(fsg, "%s, length %u:\n", label, length); \
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
+ 16, 1, buf, length, 0); \
+ } \
+} while (0)
+
+# define dump_cdb(fsg) do { } while (0)
+
+#else
+
+# define dump_msg(fsg, /* const char * */ label, \
+ /* const u8 * */ buf, /* unsigned */ length) do { } while (0)
+
+# ifdef VERBOSE_DEBUG
+
+# define dump_cdb(fsg) \
+ print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
+ 16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
+
+# else
+
+# define dump_cdb(fsg) do { } while (0)
+
+# endif /* VERBOSE_DEBUG */
+
+#endif /* DUMP_MSGS */
+
+/* Length of a SCSI Command Data Block */
+#define MAX_COMMAND_SIZE 16
+
+/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
+#define SS_NO_SENSE 0
+#define SS_COMMUNICATION_FAILURE 0x040800
+#define SS_INVALID_COMMAND 0x052000
+#define SS_INVALID_FIELD_IN_CDB 0x052400
+#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
+#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
+#define SS_MEDIUM_NOT_PRESENT 0x023a00
+#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
+#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
+#define SS_RESET_OCCURRED 0x062900
+#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
+#define SS_UNRECOVERED_READ_ERROR 0x031100
+#define SS_WRITE_ERROR 0x030c02
+#define SS_WRITE_PROTECTED 0x072700
+
+#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
+#define ASC(x) ((u8) ((x) >> 8))
+#define ASCQ(x) ((u8) (x))
+
+struct fsg_lun {
+ struct file *filp;
+ loff_t file_length;
+ loff_t num_sectors;
+
+ unsigned int initially_ro:1;
+ unsigned int ro:1;
+ unsigned int removable:1;
+ unsigned int cdrom:1;
+ unsigned int prevent_medium_removal:1;
+ unsigned int registered:1;
+ unsigned int info_valid:1;
+ unsigned int nofua:1;
+
+ u32 sense_data;
+ u32 sense_data_info;
+ u32 unit_attention_data;
+
+ unsigned int blkbits; /* Bits of logical block size
+ of bound block device */
+ unsigned int blksize; /* logical block size of bound block device */
+ struct device dev;
+ const char *name; /* "lun.name" */
+ const char **name_pfx; /* "function.name" */
+};
+
+static inline bool fsg_lun_is_open(struct fsg_lun *curlun)
+{
+ return curlun->filp != NULL;
+}
+
+/* Default size of buffer length. */
+#define FSG_BUFLEN ((u32)16384)
+
+/* Maximal number of LUNs supported in mass storage function */
+#define FSG_MAX_LUNS 8
+
+enum fsg_buffer_state {
+ BUF_STATE_EMPTY = 0,
+ BUF_STATE_FULL,
+ BUF_STATE_BUSY
+};
+
+struct fsg_buffhd {
+ void *buf;
+ enum fsg_buffer_state state;
+ struct fsg_buffhd *next;
+
+ /*
+ * The NetChip 2280 is faster, and handles some protocol faults
+ * better, if we don't submit any short bulk-out read requests.
+ * So we will record the intended request length here.
+ */
+ unsigned int bulk_out_intended_length;
+
+ struct usb_request *inreq;
+ int inreq_busy;
+ struct usb_request *outreq;
+ int outreq_busy;
+};
+
+enum fsg_state {
+ /* This one isn't used anywhere */
+ FSG_STATE_COMMAND_PHASE = -10,
+ FSG_STATE_DATA_PHASE,
+ FSG_STATE_STATUS_PHASE,
+
+ FSG_STATE_IDLE = 0,
+ FSG_STATE_ABORT_BULK_OUT,
+ FSG_STATE_RESET,
+ FSG_STATE_INTERFACE_CHANGE,
+ FSG_STATE_CONFIG_CHANGE,
+ FSG_STATE_DISCONNECT,
+ FSG_STATE_EXIT,
+ FSG_STATE_TERMINATED
+};
+
+enum data_direction {
+ DATA_DIR_UNKNOWN = 0,
+ DATA_DIR_FROM_HOST,
+ DATA_DIR_TO_HOST,
+ DATA_DIR_NONE
+};
+
+static inline u32 get_unaligned_be24(u8 *buf)
+{
+ return 0xffffff & (u32) get_unaligned_be32(buf - 1);
+}
+
+static inline struct fsg_lun *fsg_lun_from_dev(struct device *dev)
+{
+ return container_of(dev, struct fsg_lun, dev);
+}
+
+enum {
+ FSG_STRING_INTERFACE
+};
+
+extern struct usb_interface_descriptor fsg_intf_desc;
+
+extern struct usb_endpoint_descriptor fsg_fs_bulk_in_desc;
+extern struct usb_endpoint_descriptor fsg_fs_bulk_out_desc;
+extern struct usb_descriptor_header *fsg_fs_function[];
+
+extern struct usb_endpoint_descriptor fsg_hs_bulk_in_desc;
+extern struct usb_endpoint_descriptor fsg_hs_bulk_out_desc;
+extern struct usb_descriptor_header *fsg_hs_function[];
+
+extern struct usb_endpoint_descriptor fsg_ss_bulk_in_desc;
+extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc;
+extern struct usb_endpoint_descriptor fsg_ss_bulk_out_desc;
+extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc;
+extern struct usb_descriptor_header *fsg_ss_function[];
+
+void fsg_lun_close(struct fsg_lun *curlun);
+int fsg_lun_open(struct fsg_lun *curlun, const char *filename);
+int fsg_lun_fsync_sub(struct fsg_lun *curlun);
+void store_cdrom_address(u8 *dest, int msf, u32 addr);
+ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf);
+ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf);
+ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ char *buf);
+ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf);
+ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf);
+ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ const char *buf, size_t count);
+ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count);
+ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ const char *buf, size_t count);
+ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
+ const char *buf, size_t count);
+ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
+ size_t count);
+
+#endif /* USB_STORAGE_COMMON_H */
--- /dev/null
+/*
+ * u_ecm.h
+ *
+ * Utility definitions for the ecm function
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_ECM_H
+#define U_ECM_H
+
+#include <linux/usb/composite.h>
+
+struct f_ecm_opts {
+ struct usb_function_instance func_inst;
+ struct net_device *net;
+ bool bound;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+#endif /* U_ECM_H */
--- /dev/null
+/*
+ * u_eem.h
+ *
+ * Utility definitions for the eem function
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_EEM_H
+#define U_EEM_H
+
+#include <linux/usb/composite.h>
+
+struct f_eem_opts {
+ struct usb_function_instance func_inst;
+ struct net_device *net;
+ bool bound;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+#endif /* U_EEM_H */
--- /dev/null
+/*
+ * u_ether.c -- Ethernet-over-USB link layer utilities for Gadget stack
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/device.h>
+#include <linux/ctype.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+
+#include "u_ether.h"
+
+
+/*
+ * This component encapsulates the Ethernet link glue needed to provide
+ * one (!) network link through the USB gadget stack, normally "usb0".
+ *
+ * The control and data models are handled by the function driver which
+ * connects to this code; such as CDC Ethernet (ECM or EEM),
+ * "CDC Subset", or RNDIS. That includes all descriptor and endpoint
+ * management.
+ *
+ * Link level addressing is handled by this component using module
+ * parameters; if no such parameters are provided, random link level
+ * addresses are used. Each end of the link uses one address. The
+ * host end address is exported in various ways, and is often recorded
+ * in configuration databases.
+ *
+ * The driver which assembles each configuration using such a link is
+ * responsible for ensuring that each configuration includes at most one
+ * instance of is network link. (The network layer provides ways for
+ * this single "physical" link to be used by multiple virtual links.)
+ */
+
+#define UETH__VERSION "29-May-2008"
+
+struct eth_dev {
+ /* lock is held while accessing port_usb
+ */
+ spinlock_t lock;
+ struct gether *port_usb;
+
+ struct net_device *net;
+ struct usb_gadget *gadget;
+
+ spinlock_t req_lock; /* guard {rx,tx}_reqs */
+ struct list_head tx_reqs, rx_reqs;
+ atomic_t tx_qlen;
+
+ struct sk_buff_head rx_frames;
+
+ unsigned qmult;
+
+ unsigned header_len;
+ struct sk_buff *(*wrap)(struct gether *, struct sk_buff *skb);
+ int (*unwrap)(struct gether *,
+ struct sk_buff *skb,
+ struct sk_buff_head *list);
+
+ struct work_struct work;
+
+ unsigned long todo;
+#define WORK_RX_MEMORY 0
+
+ bool zlp;
+ u8 host_mac[ETH_ALEN];
+ u8 dev_mac[ETH_ALEN];
+};
+
+/*-------------------------------------------------------------------------*/
+
+#define RX_EXTRA 20 /* bytes guarding against rx overflows */
+
+#define DEFAULT_QLEN 2 /* double buffering by default */
+
+/* for dual-speed hardware, use deeper queues at high/super speed */
+static inline int qlen(struct usb_gadget *gadget, unsigned qmult)
+{
+ if (gadget_is_dualspeed(gadget) && (gadget->speed == USB_SPEED_HIGH ||
+ gadget->speed == USB_SPEED_SUPER))
+ return qmult * DEFAULT_QLEN;
+ else
+ return DEFAULT_QLEN;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* REVISIT there must be a better way than having two sets
+ * of debug calls ...
+ */
+
+#undef DBG
+#undef VDBG
+#undef ERROR
+#undef INFO
+
+#define xprintk(d, level, fmt, args...) \
+ printk(level "%s: " fmt , (d)->net->name , ## args)
+
+#ifdef DEBUG
+#undef DEBUG
+#define DBG(dev, fmt, args...) \
+ xprintk(dev , KERN_DEBUG , fmt , ## args)
+#else
+#define DBG(dev, fmt, args...) \
+ do { } while (0)
+#endif /* DEBUG */
+
+#ifdef VERBOSE_DEBUG
+#define VDBG DBG
+#else
+#define VDBG(dev, fmt, args...) \
+ do { } while (0)
+#endif /* DEBUG */
+
+#define ERROR(dev, fmt, args...) \
+ xprintk(dev , KERN_ERR , fmt , ## args)
+#define INFO(dev, fmt, args...) \
+ xprintk(dev , KERN_INFO , fmt , ## args)
+
+/*-------------------------------------------------------------------------*/
+
+/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
+
+static int ueth_change_mtu(struct net_device *net, int new_mtu)
+{
+ struct eth_dev *dev = netdev_priv(net);
+ unsigned long flags;
+ int status = 0;
+
+ /* don't change MTU on "live" link (peer won't know) */
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->port_usb)
+ status = -EBUSY;
+ else if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
+ status = -ERANGE;
+ else
+ net->mtu = new_mtu;
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return status;
+}
+
+static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
+{
+ struct eth_dev *dev = netdev_priv(net);
+
+ strlcpy(p->driver, "g_ether", sizeof(p->driver));
+ strlcpy(p->version, UETH__VERSION, sizeof(p->version));
+ strlcpy(p->fw_version, dev->gadget->name, sizeof(p->fw_version));
+ strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof(p->bus_info));
+}
+
+/* REVISIT can also support:
+ * - WOL (by tracking suspends and issuing remote wakeup)
+ * - msglevel (implies updated messaging)
+ * - ... probably more ethtool ops
+ */
+
+static const struct ethtool_ops ops = {
+ .get_drvinfo = eth_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+static void defer_kevent(struct eth_dev *dev, int flag)
+{
+ if (test_and_set_bit(flag, &dev->todo))
+ return;
+ if (!schedule_work(&dev->work))
+ ERROR(dev, "kevent %d may have been dropped\n", flag);
+ else
+ DBG(dev, "kevent %d scheduled\n", flag);
+}
+
+static void rx_complete(struct usb_ep *ep, struct usb_request *req);
+
+static int
+rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
+{
+ struct sk_buff *skb;
+ int retval = -ENOMEM;
+ size_t size = 0;
+ struct usb_ep *out;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->port_usb)
+ out = dev->port_usb->out_ep;
+ else
+ out = NULL;
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (!out)
+ return -ENOTCONN;
+
+
+ /* Padding up to RX_EXTRA handles minor disagreements with host.
+ * Normally we use the USB "terminate on short read" convention;
+ * so allow up to (N*maxpacket), since that memory is normally
+ * already allocated. Some hardware doesn't deal well with short
+ * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
+ * byte off the end (to force hardware errors on overflow).
+ *
+ * RNDIS uses internal framing, and explicitly allows senders to
+ * pad to end-of-packet. That's potentially nice for speed, but
+ * means receivers can't recover lost synch on their own (because
+ * new packets don't only start after a short RX).
+ */
+ size += sizeof(struct ethhdr) + dev->net->mtu + RX_EXTRA;
+ size += dev->port_usb->header_len;
+ size += out->maxpacket - 1;
+ size -= size % out->maxpacket;
+
+ if (dev->port_usb->is_fixed)
+ size = max_t(size_t, size, dev->port_usb->fixed_out_len);
+
+ skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
+ if (skb == NULL) {
+ DBG(dev, "no rx skb\n");
+ goto enomem;
+ }
+
+ /* Some platforms perform better when IP packets are aligned,
+ * but on at least one, checksumming fails otherwise. Note:
+ * RNDIS headers involve variable numbers of LE32 values.
+ */
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ req->buf = skb->data;
+ req->length = size;
+ req->complete = rx_complete;
+ req->context = skb;
+
+ retval = usb_ep_queue(out, req, gfp_flags);
+ if (retval == -ENOMEM)
+enomem:
+ defer_kevent(dev, WORK_RX_MEMORY);
+ if (retval) {
+ DBG(dev, "rx submit --> %d\n", retval);
+ if (skb)
+ dev_kfree_skb_any(skb);
+ spin_lock_irqsave(&dev->req_lock, flags);
+ list_add(&req->list, &dev->rx_reqs);
+ spin_unlock_irqrestore(&dev->req_lock, flags);
+ }
+ return retval;
+}
+
+static void rx_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct sk_buff *skb = req->context, *skb2;
+ struct eth_dev *dev = ep->driver_data;
+ int status = req->status;
+
+ switch (status) {
+
+ /* normal completion */
+ case 0:
+ skb_put(skb, req->actual);
+
+ if (dev->unwrap) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->port_usb) {
+ status = dev->unwrap(dev->port_usb,
+ skb,
+ &dev->rx_frames);
+ } else {
+ dev_kfree_skb_any(skb);
+ status = -ENOTCONN;
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ } else {
+ skb_queue_tail(&dev->rx_frames, skb);
+ }
+ skb = NULL;
+
+ skb2 = skb_dequeue(&dev->rx_frames);
+ while (skb2) {
+ if (status < 0
+ || ETH_HLEN > skb2->len
+ || skb2->len > VLAN_ETH_FRAME_LEN) {
+ dev->net->stats.rx_errors++;
+ dev->net->stats.rx_length_errors++;
+ DBG(dev, "rx length %d\n", skb2->len);
+ dev_kfree_skb_any(skb2);
+ goto next_frame;
+ }
+ skb2->protocol = eth_type_trans(skb2, dev->net);
+ dev->net->stats.rx_packets++;
+ dev->net->stats.rx_bytes += skb2->len;
+
+ /* no buffer copies needed, unless hardware can't
+ * use skb buffers.
+ */
+ status = netif_rx(skb2);
+next_frame:
+ skb2 = skb_dequeue(&dev->rx_frames);
+ }
+ break;
+
+ /* software-driven interface shutdown */
+ case -ECONNRESET: /* unlink */
+ case -ESHUTDOWN: /* disconnect etc */
+ VDBG(dev, "rx shutdown, code %d\n", status);
+ goto quiesce;
+
+ /* for hardware automagic (such as pxa) */
+ case -ECONNABORTED: /* endpoint reset */
+ DBG(dev, "rx %s reset\n", ep->name);
+ defer_kevent(dev, WORK_RX_MEMORY);
+quiesce:
+ dev_kfree_skb_any(skb);
+ goto clean;
+
+ /* data overrun */
+ case -EOVERFLOW:
+ dev->net->stats.rx_over_errors++;
+ /* FALLTHROUGH */
+
+ default:
+ dev->net->stats.rx_errors++;
+ DBG(dev, "rx status %d\n", status);
+ break;
+ }
+
+ if (skb)
+ dev_kfree_skb_any(skb);
+ if (!netif_running(dev->net)) {
+clean:
+ spin_lock(&dev->req_lock);
+ list_add(&req->list, &dev->rx_reqs);
+ spin_unlock(&dev->req_lock);
+ req = NULL;
+ }
+ if (req)
+ rx_submit(dev, req, GFP_ATOMIC);
+}
+
+static int prealloc(struct list_head *list, struct usb_ep *ep, unsigned n)
+{
+ unsigned i;
+ struct usb_request *req;
+
+ if (!n)
+ return -ENOMEM;
+
+ /* queue/recycle up to N requests */
+ i = n;
+ list_for_each_entry(req, list, list) {
+ if (i-- == 0)
+ goto extra;
+ }
+ while (i--) {
+ req = usb_ep_alloc_request(ep, GFP_ATOMIC);
+ if (!req)
+ return list_empty(list) ? -ENOMEM : 0;
+ list_add(&req->list, list);
+ }
+ return 0;
+
+extra:
+ /* free extras */
+ for (;;) {
+ struct list_head *next;
+
+ next = req->list.next;
+ list_del(&req->list);
+ usb_ep_free_request(ep, req);
+
+ if (next == list)
+ break;
+
+ req = container_of(next, struct usb_request, list);
+ }
+ return 0;
+}
+
+static int alloc_requests(struct eth_dev *dev, struct gether *link, unsigned n)
+{
+ int status;
+
+ spin_lock(&dev->req_lock);
+ status = prealloc(&dev->tx_reqs, link->in_ep, n);
+ if (status < 0)
+ goto fail;
+ status = prealloc(&dev->rx_reqs, link->out_ep, n);
+ if (status < 0)
+ goto fail;
+ goto done;
+fail:
+ DBG(dev, "can't alloc requests\n");
+done:
+ spin_unlock(&dev->req_lock);
+ return status;
+}
+
+static void rx_fill(struct eth_dev *dev, gfp_t gfp_flags)
+{
+ struct usb_request *req;
+ unsigned long flags;
+
+ /* fill unused rxq slots with some skb */
+ spin_lock_irqsave(&dev->req_lock, flags);
+ while (!list_empty(&dev->rx_reqs)) {
+ req = container_of(dev->rx_reqs.next,
+ struct usb_request, list);
+ list_del_init(&req->list);
+ spin_unlock_irqrestore(&dev->req_lock, flags);
+
+ if (rx_submit(dev, req, gfp_flags) < 0) {
+ defer_kevent(dev, WORK_RX_MEMORY);
+ return;
+ }
+
+ spin_lock_irqsave(&dev->req_lock, flags);
+ }
+ spin_unlock_irqrestore(&dev->req_lock, flags);
+}
+
+static void eth_work(struct work_struct *work)
+{
+ struct eth_dev *dev = container_of(work, struct eth_dev, work);
+
+ if (test_and_clear_bit(WORK_RX_MEMORY, &dev->todo)) {
+ if (netif_running(dev->net))
+ rx_fill(dev, GFP_KERNEL);
+ }
+
+ if (dev->todo)
+ DBG(dev, "work done, flags = 0x%lx\n", dev->todo);
+}
+
+static void tx_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct sk_buff *skb = req->context;
+ struct eth_dev *dev = ep->driver_data;
+
+ switch (req->status) {
+ default:
+ dev->net->stats.tx_errors++;
+ VDBG(dev, "tx err %d\n", req->status);
+ /* FALLTHROUGH */
+ case -ECONNRESET: /* unlink */
+ case -ESHUTDOWN: /* disconnect etc */
+ break;
+ case 0:
+ dev->net->stats.tx_bytes += skb->len;
+ }
+ dev->net->stats.tx_packets++;
+
+ spin_lock(&dev->req_lock);
+ list_add(&req->list, &dev->tx_reqs);
+ spin_unlock(&dev->req_lock);
+ dev_kfree_skb_any(skb);
+
+ atomic_dec(&dev->tx_qlen);
+ if (netif_carrier_ok(dev->net))
+ netif_wake_queue(dev->net);
+}
+
+static inline int is_promisc(u16 cdc_filter)
+{
+ return cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
+}
+
+static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
+ struct net_device *net)
+{
+ struct eth_dev *dev = netdev_priv(net);
+ int length = 0;
+ int retval;
+ struct usb_request *req = NULL;
+ unsigned long flags;
+ struct usb_ep *in;
+ u16 cdc_filter;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->port_usb) {
+ in = dev->port_usb->in_ep;
+ cdc_filter = dev->port_usb->cdc_filter;
+ } else {
+ in = NULL;
+ cdc_filter = 0;
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (skb && !in) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ /* apply outgoing CDC or RNDIS filters */
+ if (skb && !is_promisc(cdc_filter)) {
+ u8 *dest = skb->data;
+
+ if (is_multicast_ether_addr(dest)) {
+ u16 type;
+
+ /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
+ * SET_ETHERNET_MULTICAST_FILTERS requests
+ */
+ if (is_broadcast_ether_addr(dest))
+ type = USB_CDC_PACKET_TYPE_BROADCAST;
+ else
+ type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
+ if (!(cdc_filter & type)) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+ }
+ /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
+ }
+
+ spin_lock_irqsave(&dev->req_lock, flags);
+ /*
+ * this freelist can be empty if an interrupt triggered disconnect()
+ * and reconfigured the gadget (shutting down this queue) after the
+ * network stack decided to xmit but before we got the spinlock.
+ */
+ if (list_empty(&dev->tx_reqs)) {
+ spin_unlock_irqrestore(&dev->req_lock, flags);
+ return NETDEV_TX_BUSY;
+ }
+
+ req = container_of(dev->tx_reqs.next, struct usb_request, list);
+ list_del(&req->list);
+
+ /* temporarily stop TX queue when the freelist empties */
+ if (list_empty(&dev->tx_reqs))
+ netif_stop_queue(net);
+ spin_unlock_irqrestore(&dev->req_lock, flags);
+
+ /* no buffer copies needed, unless the network stack did it
+ * or the hardware can't use skb buffers.
+ * or there's not enough space for extra headers we need
+ */
+ if (dev->wrap) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->port_usb)
+ skb = dev->wrap(dev->port_usb, skb);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (!skb) {
+ /* Multi frame CDC protocols may store the frame for
+ * later which is not a dropped frame.
+ */
+ if (dev->port_usb->supports_multi_frame)
+ goto multiframe;
+ goto drop;
+ }
+ }
+
+ length = skb->len;
+ req->buf = skb->data;
+ req->context = skb;
+ req->complete = tx_complete;
+
+ /* NCM requires no zlp if transfer is dwNtbInMaxSize */
+ if (dev->port_usb->is_fixed &&
+ length == dev->port_usb->fixed_in_len &&
+ (length % in->maxpacket) == 0)
+ req->zero = 0;
+ else
+ req->zero = 1;
+
+ /* use zlp framing on tx for strict CDC-Ether conformance,
+ * though any robust network rx path ignores extra padding.
+ * and some hardware doesn't like to write zlps.
+ */
+ if (req->zero && !dev->zlp && (length % in->maxpacket) == 0)
+ length++;
+
+ req->length = length;
+
+ /* throttle high/super speed IRQ rate back slightly */
+ if (gadget_is_dualspeed(dev->gadget))
+ req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH ||
+ dev->gadget->speed == USB_SPEED_SUPER)
+ ? ((atomic_read(&dev->tx_qlen) % dev->qmult) != 0)
+ : 0;
+
+ retval = usb_ep_queue(in, req, GFP_ATOMIC);
+ switch (retval) {
+ default:
+ DBG(dev, "tx queue err %d\n", retval);
+ break;
+ case 0:
+ net->trans_start = jiffies;
+ atomic_inc(&dev->tx_qlen);
+ }
+
+ if (retval) {
+ dev_kfree_skb_any(skb);
+drop:
+ dev->net->stats.tx_dropped++;
+multiframe:
+ spin_lock_irqsave(&dev->req_lock, flags);
+ if (list_empty(&dev->tx_reqs))
+ netif_start_queue(net);
+ list_add(&req->list, &dev->tx_reqs);
+ spin_unlock_irqrestore(&dev->req_lock, flags);
+ }
+ return NETDEV_TX_OK;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
+{
+ DBG(dev, "%s\n", __func__);
+
+ /* fill the rx queue */
+ rx_fill(dev, gfp_flags);
+
+ /* and open the tx floodgates */
+ atomic_set(&dev->tx_qlen, 0);
+ netif_wake_queue(dev->net);
+}
+
+static int eth_open(struct net_device *net)
+{
+ struct eth_dev *dev = netdev_priv(net);
+ struct gether *link;
+
+ DBG(dev, "%s\n", __func__);
+ if (netif_carrier_ok(dev->net))
+ eth_start(dev, GFP_KERNEL);
+
+ spin_lock_irq(&dev->lock);
+ link = dev->port_usb;
+ if (link && link->open)
+ link->open(link);
+ spin_unlock_irq(&dev->lock);
+
+ return 0;
+}
+
+static int eth_stop(struct net_device *net)
+{
+ struct eth_dev *dev = netdev_priv(net);
+ unsigned long flags;
+
+ VDBG(dev, "%s\n", __func__);
+ netif_stop_queue(net);
+
+ DBG(dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
+ dev->net->stats.rx_packets, dev->net->stats.tx_packets,
+ dev->net->stats.rx_errors, dev->net->stats.tx_errors
+ );
+
+ /* ensure there are no more active requests */
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->port_usb) {
+ struct gether *link = dev->port_usb;
+ const struct usb_endpoint_descriptor *in;
+ const struct usb_endpoint_descriptor *out;
+
+ if (link->close)
+ link->close(link);
+
+ /* NOTE: we have no abort-queue primitive we could use
+ * to cancel all pending I/O. Instead, we disable then
+ * reenable the endpoints ... this idiom may leave toggle
+ * wrong, but that's a self-correcting error.
+ *
+ * REVISIT: we *COULD* just let the transfers complete at
+ * their own pace; the network stack can handle old packets.
+ * For the moment we leave this here, since it works.
+ */
+ in = link->in_ep->desc;
+ out = link->out_ep->desc;
+ usb_ep_disable(link->in_ep);
+ usb_ep_disable(link->out_ep);
+ if (netif_carrier_ok(net)) {
+ DBG(dev, "host still using in/out endpoints\n");
+ link->in_ep->desc = in;
+ link->out_ep->desc = out;
+ usb_ep_enable(link->in_ep);
+ usb_ep_enable(link->out_ep);
+ }
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int get_ether_addr(const char *str, u8 *dev_addr)
+{
+ if (str) {
+ unsigned i;
+
+ for (i = 0; i < 6; i++) {
+ unsigned char num;
+
+ if ((*str == '.') || (*str == ':'))
+ str++;
+ num = hex_to_bin(*str++) << 4;
+ num |= hex_to_bin(*str++);
+ dev_addr [i] = num;
+ }
+ if (is_valid_ether_addr(dev_addr))
+ return 0;
+ }
+ eth_random_addr(dev_addr);
+ return 1;
+}
+
+static int get_ether_addr_str(u8 dev_addr[ETH_ALEN], char *str, int len)
+{
+ if (len < 18)
+ return -EINVAL;
+
+ snprintf(str, len, "%02x:%02x:%02x:%02x:%02x:%02x",
+ dev_addr[0], dev_addr[1], dev_addr[2],
+ dev_addr[3], dev_addr[4], dev_addr[5]);
+ return 18;
+}
+
+static const struct net_device_ops eth_netdev_ops = {
+ .ndo_open = eth_open,
+ .ndo_stop = eth_stop,
+ .ndo_start_xmit = eth_start_xmit,
+ .ndo_change_mtu = ueth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static struct device_type gadget_type = {
+ .name = "gadget",
+};
+
+/**
+ * gether_setup_name - initialize one ethernet-over-usb link
+ * @g: gadget to associated with these links
+ * @ethaddr: NULL, or a buffer in which the ethernet address of the
+ * host side of the link is recorded
+ * @netname: name for network device (for example, "usb")
+ * Context: may sleep
+ *
+ * This sets up the single network link that may be exported by a
+ * gadget driver using this framework. The link layer addresses are
+ * set up using module parameters.
+ *
+ * Returns an eth_dev pointer on success, or an ERR_PTR on failure.
+ */
+struct eth_dev *gether_setup_name(struct usb_gadget *g,
+ const char *dev_addr, const char *host_addr,
+ u8 ethaddr[ETH_ALEN], unsigned qmult, const char *netname)
+{
+ struct eth_dev *dev;
+ struct net_device *net;
+ int status;
+
+ net = alloc_etherdev(sizeof *dev);
+ if (!net)
+ return ERR_PTR(-ENOMEM);
+
+ dev = netdev_priv(net);
+ spin_lock_init(&dev->lock);
+ spin_lock_init(&dev->req_lock);
+ INIT_WORK(&dev->work, eth_work);
+ INIT_LIST_HEAD(&dev->tx_reqs);
+ INIT_LIST_HEAD(&dev->rx_reqs);
+
+ skb_queue_head_init(&dev->rx_frames);
+
+ /* network device setup */
+ dev->net = net;
+ dev->qmult = qmult;
+ snprintf(net->name, sizeof(net->name), "%s%%d", netname);
+
+ if (get_ether_addr(dev_addr, net->dev_addr))
+ dev_warn(&g->dev,
+ "using random %s ethernet address\n", "self");
+ if (get_ether_addr(host_addr, dev->host_mac))
+ dev_warn(&g->dev,
+ "using random %s ethernet address\n", "host");
+
+ if (ethaddr)
+ memcpy(ethaddr, dev->host_mac, ETH_ALEN);
+
+ net->netdev_ops = ð_netdev_ops;
+
+ net->ethtool_ops = &ops;
+
+ dev->gadget = g;
+ SET_NETDEV_DEV(net, &g->dev);
+ SET_NETDEV_DEVTYPE(net, &gadget_type);
+
+ status = register_netdev(net);
+ if (status < 0) {
+ dev_dbg(&g->dev, "register_netdev failed, %d\n", status);
+ free_netdev(net);
+ dev = ERR_PTR(status);
+ } else {
+ INFO(dev, "MAC %pM\n", net->dev_addr);
+ INFO(dev, "HOST MAC %pM\n", dev->host_mac);
+
+ /*
+ * two kinds of host-initiated state changes:
+ * - iff DATA transfer is active, carrier is "on"
+ * - tx queueing enabled if open *and* carrier is "on"
+ */
+ netif_carrier_off(net);
+ }
+
+ return dev;
+}
+EXPORT_SYMBOL_GPL(gether_setup_name);
+
+struct net_device *gether_setup_name_default(const char *netname)
+{
+ struct net_device *net;
+ struct eth_dev *dev;
+
+ net = alloc_etherdev(sizeof(*dev));
+ if (!net)
+ return ERR_PTR(-ENOMEM);
+
+ dev = netdev_priv(net);
+ spin_lock_init(&dev->lock);
+ spin_lock_init(&dev->req_lock);
+ INIT_WORK(&dev->work, eth_work);
+ INIT_LIST_HEAD(&dev->tx_reqs);
+ INIT_LIST_HEAD(&dev->rx_reqs);
+
+ skb_queue_head_init(&dev->rx_frames);
+
+ /* network device setup */
+ dev->net = net;
+ dev->qmult = QMULT_DEFAULT;
+ snprintf(net->name, sizeof(net->name), "%s%%d", netname);
+
+ eth_random_addr(dev->dev_mac);
+ pr_warn("using random %s ethernet address\n", "self");
+ eth_random_addr(dev->host_mac);
+ pr_warn("using random %s ethernet address\n", "host");
+
+ net->netdev_ops = ð_netdev_ops;
+
+ net->ethtool_ops = &ops;
+ SET_NETDEV_DEVTYPE(net, &gadget_type);
+
+ return net;
+}
+EXPORT_SYMBOL_GPL(gether_setup_name_default);
+
+int gether_register_netdev(struct net_device *net)
+{
+ struct eth_dev *dev;
+ struct usb_gadget *g;
+ struct sockaddr sa;
+ int status;
+
+ if (!net->dev.parent)
+ return -EINVAL;
+ dev = netdev_priv(net);
+ g = dev->gadget;
+ status = register_netdev(net);
+ if (status < 0) {
+ dev_dbg(&g->dev, "register_netdev failed, %d\n", status);
+ return status;
+ } else {
+ INFO(dev, "HOST MAC %pM\n", dev->host_mac);
+
+ /* two kinds of host-initiated state changes:
+ * - iff DATA transfer is active, carrier is "on"
+ * - tx queueing enabled if open *and* carrier is "on"
+ */
+ netif_carrier_off(net);
+ }
+ sa.sa_family = net->type;
+ memcpy(sa.sa_data, dev->dev_mac, ETH_ALEN);
+ rtnl_lock();
+ status = dev_set_mac_address(net, &sa);
+ rtnl_unlock();
+ if (status)
+ pr_warn("cannot set self ethernet address: %d\n", status);
+ else
+ INFO(dev, "MAC %pM\n", dev->dev_mac);
+
+ return status;
+}
+EXPORT_SYMBOL_GPL(gether_register_netdev);
+
+void gether_set_gadget(struct net_device *net, struct usb_gadget *g)
+{
+ struct eth_dev *dev;
+
+ dev = netdev_priv(net);
+ dev->gadget = g;
+ SET_NETDEV_DEV(net, &g->dev);
+}
+EXPORT_SYMBOL_GPL(gether_set_gadget);
+
+int gether_set_dev_addr(struct net_device *net, const char *dev_addr)
+{
+ struct eth_dev *dev;
+ u8 new_addr[ETH_ALEN];
+
+ dev = netdev_priv(net);
+ if (get_ether_addr(dev_addr, new_addr))
+ return -EINVAL;
+ memcpy(dev->dev_mac, new_addr, ETH_ALEN);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gether_set_dev_addr);
+
+int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len)
+{
+ struct eth_dev *dev;
+
+ dev = netdev_priv(net);
+ return get_ether_addr_str(dev->dev_mac, dev_addr, len);
+}
+EXPORT_SYMBOL_GPL(gether_get_dev_addr);
+
+int gether_set_host_addr(struct net_device *net, const char *host_addr)
+{
+ struct eth_dev *dev;
+ u8 new_addr[ETH_ALEN];
+
+ dev = netdev_priv(net);
+ if (get_ether_addr(host_addr, new_addr))
+ return -EINVAL;
+ memcpy(dev->host_mac, new_addr, ETH_ALEN);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gether_set_host_addr);
+
+int gether_get_host_addr(struct net_device *net, char *host_addr, int len)
+{
+ struct eth_dev *dev;
+
+ dev = netdev_priv(net);
+ return get_ether_addr_str(dev->host_mac, host_addr, len);
+}
+EXPORT_SYMBOL_GPL(gether_get_host_addr);
+
+int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len)
+{
+ struct eth_dev *dev;
+
+ if (len < 13)
+ return -EINVAL;
+
+ dev = netdev_priv(net);
+ snprintf(host_addr, len, "%pm", dev->host_mac);
+
+ return strlen(host_addr);
+}
+EXPORT_SYMBOL_GPL(gether_get_host_addr_cdc);
+
+void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN])
+{
+ struct eth_dev *dev;
+
+ dev = netdev_priv(net);
+ memcpy(host_mac, dev->host_mac, ETH_ALEN);
+}
+EXPORT_SYMBOL_GPL(gether_get_host_addr_u8);
+
+void gether_set_qmult(struct net_device *net, unsigned qmult)
+{
+ struct eth_dev *dev;
+
+ dev = netdev_priv(net);
+ dev->qmult = qmult;
+}
+EXPORT_SYMBOL_GPL(gether_set_qmult);
+
+unsigned gether_get_qmult(struct net_device *net)
+{
+ struct eth_dev *dev;
+
+ dev = netdev_priv(net);
+ return dev->qmult;
+}
+EXPORT_SYMBOL_GPL(gether_get_qmult);
+
+int gether_get_ifname(struct net_device *net, char *name, int len)
+{
+ rtnl_lock();
+ strlcpy(name, netdev_name(net), len);
+ rtnl_unlock();
+ return strlen(name);
+}
+EXPORT_SYMBOL_GPL(gether_get_ifname);
+
+/**
+ * gether_cleanup - remove Ethernet-over-USB device
+ * Context: may sleep
+ *
+ * This is called to free all resources allocated by @gether_setup().
+ */
+void gether_cleanup(struct eth_dev *dev)
+{
+ if (!dev)
+ return;
+
+ unregister_netdev(dev->net);
+ flush_work(&dev->work);
+ free_netdev(dev->net);
+}
+EXPORT_SYMBOL_GPL(gether_cleanup);
+
+/**
+ * gether_connect - notify network layer that USB link is active
+ * @link: the USB link, set up with endpoints, descriptors matching
+ * current device speed, and any framing wrapper(s) set up.
+ * Context: irqs blocked
+ *
+ * This is called to activate endpoints and let the network layer know
+ * the connection is active ("carrier detect"). It may cause the I/O
+ * queues to open and start letting network packets flow, but will in
+ * any case activate the endpoints so that they respond properly to the
+ * USB host.
+ *
+ * Verify net_device pointer returned using IS_ERR(). If it doesn't
+ * indicate some error code (negative errno), ep->driver_data values
+ * have been overwritten.
+ */
+struct net_device *gether_connect(struct gether *link)
+{
+ struct eth_dev *dev = link->ioport;
+ int result = 0;
+
+ if (!dev)
+ return ERR_PTR(-EINVAL);
+
+ link->in_ep->driver_data = dev;
+ result = usb_ep_enable(link->in_ep);
+ if (result != 0) {
+ DBG(dev, "enable %s --> %d\n",
+ link->in_ep->name, result);
+ goto fail0;
+ }
+
+ link->out_ep->driver_data = dev;
+ result = usb_ep_enable(link->out_ep);
+ if (result != 0) {
+ DBG(dev, "enable %s --> %d\n",
+ link->out_ep->name, result);
+ goto fail1;
+ }
+
+ if (result == 0)
+ result = alloc_requests(dev, link, qlen(dev->gadget,
+ dev->qmult));
+
+ if (result == 0) {
+ dev->zlp = link->is_zlp_ok;
+ DBG(dev, "qlen %d\n", qlen(dev->gadget, dev->qmult));
+
+ dev->header_len = link->header_len;
+ dev->unwrap = link->unwrap;
+ dev->wrap = link->wrap;
+
+ spin_lock(&dev->lock);
+ dev->port_usb = link;
+ if (netif_running(dev->net)) {
+ if (link->open)
+ link->open(link);
+ } else {
+ if (link->close)
+ link->close(link);
+ }
+ spin_unlock(&dev->lock);
+
+ netif_carrier_on(dev->net);
+ if (netif_running(dev->net))
+ eth_start(dev, GFP_ATOMIC);
+
+ /* on error, disable any endpoints */
+ } else {
+ (void) usb_ep_disable(link->out_ep);
+fail1:
+ (void) usb_ep_disable(link->in_ep);
+ }
+fail0:
+ /* caller is responsible for cleanup on error */
+ if (result < 0)
+ return ERR_PTR(result);
+ return dev->net;
+}
+EXPORT_SYMBOL_GPL(gether_connect);
+
+/**
+ * gether_disconnect - notify network layer that USB link is inactive
+ * @link: the USB link, on which gether_connect() was called
+ * Context: irqs blocked
+ *
+ * This is called to deactivate endpoints and let the network layer know
+ * the connection went inactive ("no carrier").
+ *
+ * On return, the state is as if gether_connect() had never been called.
+ * The endpoints are inactive, and accordingly without active USB I/O.
+ * Pointers to endpoint descriptors and endpoint private data are nulled.
+ */
+void gether_disconnect(struct gether *link)
+{
+ struct eth_dev *dev = link->ioport;
+ struct usb_request *req;
+
+ WARN_ON(!dev);
+ if (!dev)
+ return;
+
+ DBG(dev, "%s\n", __func__);
+
+ netif_stop_queue(dev->net);
+ netif_carrier_off(dev->net);
+
+ /* disable endpoints, forcing (synchronous) completion
+ * of all pending i/o. then free the request objects
+ * and forget about the endpoints.
+ */
+ usb_ep_disable(link->in_ep);
+ spin_lock(&dev->req_lock);
+ while (!list_empty(&dev->tx_reqs)) {
+ req = container_of(dev->tx_reqs.next,
+ struct usb_request, list);
+ list_del(&req->list);
+
+ spin_unlock(&dev->req_lock);
+ usb_ep_free_request(link->in_ep, req);
+ spin_lock(&dev->req_lock);
+ }
+ spin_unlock(&dev->req_lock);
+ link->in_ep->driver_data = NULL;
+ link->in_ep->desc = NULL;
+
+ usb_ep_disable(link->out_ep);
+ spin_lock(&dev->req_lock);
+ while (!list_empty(&dev->rx_reqs)) {
+ req = container_of(dev->rx_reqs.next,
+ struct usb_request, list);
+ list_del(&req->list);
+
+ spin_unlock(&dev->req_lock);
+ usb_ep_free_request(link->out_ep, req);
+ spin_lock(&dev->req_lock);
+ }
+ spin_unlock(&dev->req_lock);
+ link->out_ep->driver_data = NULL;
+ link->out_ep->desc = NULL;
+
+ /* finish forgetting about this USB link episode */
+ dev->header_len = 0;
+ dev->unwrap = NULL;
+ dev->wrap = NULL;
+
+ spin_lock(&dev->lock);
+ dev->port_usb = NULL;
+ spin_unlock(&dev->lock);
+}
+EXPORT_SYMBOL_GPL(gether_disconnect);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Brownell");
--- /dev/null
+/*
+ * u_ether.h -- interface to USB gadget "ethernet link" utilities
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __U_ETHER_H
+#define __U_ETHER_H
+
+#include <linux/err.h>
+#include <linux/if_ether.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/cdc.h>
+#include <linux/netdevice.h>
+
+#include "gadget_chips.h"
+
+#define QMULT_DEFAULT 5
+
+/*
+ * dev_addr: initial value
+ * changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx"
+ * host_addr: this address is invisible to ifconfig
+ */
+#define USB_ETHERNET_MODULE_PARAMETERS() \
+ static unsigned qmult = QMULT_DEFAULT; \
+ module_param(qmult, uint, S_IRUGO|S_IWUSR); \
+ MODULE_PARM_DESC(qmult, "queue length multiplier at high/super speed");\
+ \
+ static char *dev_addr; \
+ module_param(dev_addr, charp, S_IRUGO); \
+ MODULE_PARM_DESC(dev_addr, "Device Ethernet Address"); \
+ \
+ static char *host_addr; \
+ module_param(host_addr, charp, S_IRUGO); \
+ MODULE_PARM_DESC(host_addr, "Host Ethernet Address")
+
+struct eth_dev;
+
+/*
+ * This represents the USB side of an "ethernet" link, managed by a USB
+ * function which provides control and (maybe) framing. Two functions
+ * in different configurations could share the same ethernet link/netdev,
+ * using different host interaction models.
+ *
+ * There is a current limitation that only one instance of this link may
+ * be present in any given configuration. When that's a problem, network
+ * layer facilities can be used to package multiple logical links on this
+ * single "physical" one.
+ */
+struct gether {
+ struct usb_function func;
+
+ /* updated by gether_{connect,disconnect} */
+ struct eth_dev *ioport;
+
+ /* endpoints handle full and/or high speeds */
+ struct usb_ep *in_ep;
+ struct usb_ep *out_ep;
+
+ bool is_zlp_ok;
+
+ u16 cdc_filter;
+
+ /* hooks for added framing, as needed for RNDIS and EEM. */
+ u32 header_len;
+ /* NCM requires fixed size bundles */
+ bool is_fixed;
+ u32 fixed_out_len;
+ u32 fixed_in_len;
+ bool supports_multi_frame;
+ struct sk_buff *(*wrap)(struct gether *port,
+ struct sk_buff *skb);
+ int (*unwrap)(struct gether *port,
+ struct sk_buff *skb,
+ struct sk_buff_head *list);
+
+ /* called on network open/close */
+ void (*open)(struct gether *);
+ void (*close)(struct gether *);
+};
+
+#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
+ |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
+ |USB_CDC_PACKET_TYPE_PROMISCUOUS \
+ |USB_CDC_PACKET_TYPE_DIRECTED)
+
+/* variant of gether_setup that allows customizing network device name */
+struct eth_dev *gether_setup_name(struct usb_gadget *g,
+ const char *dev_addr, const char *host_addr,
+ u8 ethaddr[ETH_ALEN], unsigned qmult, const char *netname);
+
+/* netdev setup/teardown as directed by the gadget driver */
+/* gether_setup - initialize one ethernet-over-usb link
+ * @g: gadget to associated with these links
+ * @ethaddr: NULL, or a buffer in which the ethernet address of the
+ * host side of the link is recorded
+ * Context: may sleep
+ *
+ * This sets up the single network link that may be exported by a
+ * gadget driver using this framework. The link layer addresses are
+ * set up using module parameters.
+ *
+ * Returns a eth_dev pointer on success, or an ERR_PTR on failure
+ */
+static inline struct eth_dev *gether_setup(struct usb_gadget *g,
+ const char *dev_addr, const char *host_addr,
+ u8 ethaddr[ETH_ALEN], unsigned qmult)
+{
+ return gether_setup_name(g, dev_addr, host_addr, ethaddr, qmult, "usb");
+}
+
+/*
+ * variant of gether_setup_default that allows customizing
+ * network device name
+ */
+struct net_device *gether_setup_name_default(const char *netname);
+
+/*
+ * gether_register_netdev - register the net device
+ * @net: net device to register
+ *
+ * Registers the net device associated with this ethernet-over-usb link
+ *
+ */
+int gether_register_netdev(struct net_device *net);
+
+/* gether_setup_default - initialize one ethernet-over-usb link
+ * Context: may sleep
+ *
+ * This sets up the single network link that may be exported by a
+ * gadget driver using this framework. The link layer addresses
+ * are set to random values.
+ *
+ * Returns negative errno, or zero on success
+ */
+static inline struct net_device *gether_setup_default(void)
+{
+ return gether_setup_name_default("usb");
+}
+
+/**
+ * gether_set_gadget - initialize one ethernet-over-usb link with a gadget
+ * @net: device representing this link
+ * @g: the gadget to initialize with
+ *
+ * This associates one ethernet-over-usb link with a gadget.
+ */
+void gether_set_gadget(struct net_device *net, struct usb_gadget *g);
+
+/**
+ * gether_set_dev_addr - initialize an ethernet-over-usb link with eth address
+ * @net: device representing this link
+ * @dev_addr: eth address of this device
+ *
+ * This sets the device-side Ethernet address of this ethernet-over-usb link
+ * if dev_addr is correct.
+ * Returns negative errno if the new address is incorrect.
+ */
+int gether_set_dev_addr(struct net_device *net, const char *dev_addr);
+
+/**
+ * gether_get_dev_addr - get an ethernet-over-usb link eth address
+ * @net: device representing this link
+ * @dev_addr: place to store device's eth address
+ * @len: length of the @dev_addr buffer
+ *
+ * This gets the device-side Ethernet address of this ethernet-over-usb link.
+ * Returns zero on success, else negative errno.
+ */
+int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len);
+
+/**
+ * gether_set_host_addr - initialize an ethernet-over-usb link with host address
+ * @net: device representing this link
+ * @host_addr: eth address of the host
+ *
+ * This sets the host-side Ethernet address of this ethernet-over-usb link
+ * if host_addr is correct.
+ * Returns negative errno if the new address is incorrect.
+ */
+int gether_set_host_addr(struct net_device *net, const char *host_addr);
+
+/**
+ * gether_get_host_addr - get an ethernet-over-usb link host address
+ * @net: device representing this link
+ * @host_addr: place to store eth address of the host
+ * @len: length of the @host_addr buffer
+ *
+ * This gets the host-side Ethernet address of this ethernet-over-usb link.
+ * Returns zero on success, else negative errno.
+ */
+int gether_get_host_addr(struct net_device *net, char *host_addr, int len);
+
+/**
+ * gether_get_host_addr_cdc - get an ethernet-over-usb link host address
+ * @net: device representing this link
+ * @host_addr: place to store eth address of the host
+ * @len: length of the @host_addr buffer
+ *
+ * This gets the CDC formatted host-side Ethernet address of this
+ * ethernet-over-usb link.
+ * Returns zero on success, else negative errno.
+ */
+int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len);
+
+/**
+ * gether_get_host_addr_u8 - get an ethernet-over-usb link host address
+ * @net: device representing this link
+ * @host_mac: place to store the eth address of the host
+ *
+ * This gets the binary formatted host-side Ethernet address of this
+ * ethernet-over-usb link.
+ */
+void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN]);
+
+/**
+ * gether_set_qmult - initialize an ethernet-over-usb link with a multiplier
+ * @net: device representing this link
+ * @qmult: queue multiplier
+ *
+ * This sets the queue length multiplier of this ethernet-over-usb link.
+ * For higher speeds use longer queues.
+ */
+void gether_set_qmult(struct net_device *net, unsigned qmult);
+
+/**
+ * gether_get_qmult - get an ethernet-over-usb link multiplier
+ * @net: device representing this link
+ *
+ * This gets the queue length multiplier of this ethernet-over-usb link.
+ */
+unsigned gether_get_qmult(struct net_device *net);
+
+/**
+ * gether_get_ifname - get an ethernet-over-usb link interface name
+ * @net: device representing this link
+ * @name: place to store the interface name
+ * @len: length of the @name buffer
+ *
+ * This gets the interface name of this ethernet-over-usb link.
+ * Returns zero on success, else negative errno.
+ */
+int gether_get_ifname(struct net_device *net, char *name, int len);
+
+void gether_cleanup(struct eth_dev *dev);
+
+/* connect/disconnect is handled by individual functions */
+struct net_device *gether_connect(struct gether *);
+void gether_disconnect(struct gether *);
+
+/* Some controllers can't support CDC Ethernet (ECM) ... */
+static inline bool can_support_ecm(struct usb_gadget *gadget)
+{
+ if (!gadget_supports_altsettings(gadget))
+ return false;
+
+ /* Everything else is *presumably* fine ... but this is a bit
+ * chancy, so be **CERTAIN** there are no hardware issues with
+ * your controller. Add it above if it can't handle CDC.
+ */
+ return true;
+}
+
+#endif /* __U_ETHER_H */
--- /dev/null
+/*
+ * u_ether_configfs.h
+ *
+ * Utility definitions for configfs support in USB Ethernet functions
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __U_ETHER_CONFIGFS_H
+#define __U_ETHER_CONFIGFS_H
+
+#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \
+ CONFIGFS_ATTR_STRUCT(f_##_f_##_opts); \
+ CONFIGFS_ATTR_OPS(f_##_f_##_opts); \
+ \
+ static void _f_##_attr_release(struct config_item *item) \
+ { \
+ struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
+ \
+ usb_put_function_instance(&opts->func_inst); \
+ } \
+ \
+ static struct configfs_item_operations _f_##_item_ops = { \
+ .release = _f_##_attr_release, \
+ .show_attribute = f_##_f_##_opts_attr_show, \
+ .store_attribute = f_##_f_##_opts_attr_store, \
+ }
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \
+ static ssize_t _f_##_opts_dev_addr_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int result; \
+ \
+ mutex_lock(&opts->lock); \
+ result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return result; \
+ } \
+ \
+ static ssize_t _f_##_opts_dev_addr_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ mutex_unlock(&opts->lock); \
+ return -EBUSY; \
+ } \
+ \
+ ret = gether_set_dev_addr(opts->net, page); \
+ mutex_unlock(&opts->lock); \
+ if (!ret) \
+ ret = len; \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_dev_addr = \
+ __CONFIGFS_ATTR(dev_addr, S_IRUGO | S_IWUSR, \
+ _f_##_opts_dev_addr_show, \
+ _f_##_opts_dev_addr_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \
+ static ssize_t _f_##_opts_host_addr_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int result; \
+ \
+ mutex_lock(&opts->lock); \
+ result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return result; \
+ } \
+ \
+ static ssize_t _f_##_opts_host_addr_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ mutex_unlock(&opts->lock); \
+ return -EBUSY; \
+ } \
+ \
+ ret = gether_set_host_addr(opts->net, page); \
+ mutex_unlock(&opts->lock); \
+ if (!ret) \
+ ret = len; \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_host_addr = \
+ __CONFIGFS_ATTR(host_addr, S_IRUGO | S_IWUSR, \
+ _f_##_opts_host_addr_show, \
+ _f_##_opts_host_addr_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \
+ static ssize_t _f_##_opts_qmult_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ unsigned qmult; \
+ \
+ mutex_lock(&opts->lock); \
+ qmult = gether_get_qmult(opts->net); \
+ mutex_unlock(&opts->lock); \
+ return sprintf(page, "%d", qmult); \
+ } \
+ \
+ static ssize_t _f_##_opts_qmult_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ u8 val; \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ ret = -EBUSY; \
+ goto out; \
+ } \
+ \
+ ret = kstrtou8(page, 0, &val); \
+ if (ret) \
+ goto out; \
+ \
+ gether_set_qmult(opts->net, val); \
+ ret = len; \
+out: \
+ mutex_unlock(&opts->lock); \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_qmult = \
+ __CONFIGFS_ATTR(qmult, S_IRUGO | S_IWUSR, \
+ _f_##_opts_qmult_show, \
+ _f_##_opts_qmult_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \
+ static ssize_t _f_##_opts_ifname_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_ifname = \
+ __CONFIGFS_ATTR_RO(ifname, _f_##_opts_ifname_show)
+
+#endif /* __U_ETHER_CONFIGFS_H */
--- /dev/null
+/*
+ * u_fs.h
+ *
+ * Utility definitions for the FunctionFS
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_FFS_H
+#define U_FFS_H
+
+#include <linux/usb/composite.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+
+#ifdef VERBOSE_DEBUG
+#ifndef pr_vdebug
+# define pr_vdebug pr_debug
+#endif /* pr_vdebug */
+# define ffs_dump_mem(prefix, ptr, len) \
+ print_hex_dump_bytes(pr_fmt(prefix ": "), DUMP_PREFIX_NONE, ptr, len)
+#else
+#ifndef pr_vdebug
+# define pr_vdebug(...) do { } while (0)
+#endif /* pr_vdebug */
+# define ffs_dump_mem(prefix, ptr, len) do { } while (0)
+#endif /* VERBOSE_DEBUG */
+
+#define ENTER() pr_vdebug("%s()\n", __func__)
+
+struct f_fs_opts;
+
+struct ffs_dev {
+ const char *name;
+ bool name_allocated;
+ bool mounted;
+ bool desc_ready;
+ bool single;
+ struct ffs_data *ffs_data;
+ struct f_fs_opts *opts;
+ struct list_head entry;
+
+ int (*ffs_ready_callback)(struct ffs_data *ffs);
+ void (*ffs_closed_callback)(struct ffs_data *ffs);
+ void *(*ffs_acquire_dev_callback)(struct ffs_dev *dev);
+ void (*ffs_release_dev_callback)(struct ffs_dev *dev);
+};
+
+extern struct mutex ffs_lock;
+
+static inline void ffs_dev_lock(void)
+{
+ mutex_lock(&ffs_lock);
+}
+
+static inline void ffs_dev_unlock(void)
+{
+ mutex_unlock(&ffs_lock);
+}
+
+int ffs_name_dev(struct ffs_dev *dev, const char *name);
+int ffs_single_dev(struct ffs_dev *dev);
+
+struct ffs_epfile;
+struct ffs_function;
+
+enum ffs_state {
+ /*
+ * Waiting for descriptors and strings.
+ *
+ * In this state no open(2), read(2) or write(2) on epfiles
+ * may succeed (which should not be the problem as there
+ * should be no such files opened in the first place).
+ */
+ FFS_READ_DESCRIPTORS,
+ FFS_READ_STRINGS,
+
+ /*
+ * We've got descriptors and strings. We are or have called
+ * functionfs_ready_callback(). functionfs_bind() may have
+ * been called but we don't know.
+ *
+ * This is the only state in which operations on epfiles may
+ * succeed.
+ */
+ FFS_ACTIVE,
+
+ /*
+ * All endpoints have been closed. This state is also set if
+ * we encounter an unrecoverable error. The only
+ * unrecoverable error is situation when after reading strings
+ * from user space we fail to initialise epfiles or
+ * functionfs_ready_callback() returns with error (<0).
+ *
+ * In this state no open(2), read(2) or write(2) (both on ep0
+ * as well as epfile) may succeed (at this point epfiles are
+ * unlinked and all closed so this is not a problem; ep0 is
+ * also closed but ep0 file exists and so open(2) on ep0 must
+ * fail).
+ */
+ FFS_CLOSING
+};
+
+enum ffs_setup_state {
+ /* There is no setup request pending. */
+ FFS_NO_SETUP,
+ /*
+ * User has read events and there was a setup request event
+ * there. The next read/write on ep0 will handle the
+ * request.
+ */
+ FFS_SETUP_PENDING,
+ /*
+ * There was event pending but before user space handled it
+ * some other event was introduced which canceled existing
+ * setup. If this state is set read/write on ep0 return
+ * -EIDRM. This state is only set when adding event.
+ */
+ FFS_SETUP_CANCELLED
+};
+
+struct ffs_data {
+ struct usb_gadget *gadget;
+
+ /*
+ * Protect access read/write operations, only one read/write
+ * at a time. As a consequence protects ep0req and company.
+ * While setup request is being processed (queued) this is
+ * held.
+ */
+ struct mutex mutex;
+
+ /*
+ * Protect access to endpoint related structures (basically
+ * usb_ep_queue(), usb_ep_dequeue(), etc. calls) except for
+ * endpoint zero.
+ */
+ spinlock_t eps_lock;
+
+ /*
+ * XXX REVISIT do we need our own request? Since we are not
+ * handling setup requests immediately user space may be so
+ * slow that another setup will be sent to the gadget but this
+ * time not to us but another function and then there could be
+ * a race. Is that the case? Or maybe we can use cdev->req
+ * after all, maybe we just need some spinlock for that?
+ */
+ struct usb_request *ep0req; /* P: mutex */
+ struct completion ep0req_completion; /* P: mutex */
+
+ /* reference counter */
+ atomic_t ref;
+ /* how many files are opened (EP0 and others) */
+ atomic_t opened;
+
+ /* EP0 state */
+ enum ffs_state state;
+
+ /*
+ * Possible transitions:
+ * + FFS_NO_SETUP -> FFS_SETUP_PENDING -- P: ev.waitq.lock
+ * happens only in ep0 read which is P: mutex
+ * + FFS_SETUP_PENDING -> FFS_NO_SETUP -- P: ev.waitq.lock
+ * happens only in ep0 i/o which is P: mutex
+ * + FFS_SETUP_PENDING -> FFS_SETUP_CANCELLED -- P: ev.waitq.lock
+ * + FFS_SETUP_CANCELLED -> FFS_NO_SETUP -- cmpxchg
+ *
+ * This field should never be accessed directly and instead
+ * ffs_setup_state_clear_cancelled function should be used.
+ */
+ enum ffs_setup_state setup_state;
+
+ /* Events & such. */
+ struct {
+ u8 types[4];
+ unsigned short count;
+ /* XXX REVISIT need to update it in some places, or do we? */
+ unsigned short can_stall;
+ struct usb_ctrlrequest setup;
+
+ wait_queue_head_t waitq;
+ } ev; /* the whole structure, P: ev.waitq.lock */
+
+ /* Flags */
+ unsigned long flags;
+#define FFS_FL_CALL_CLOSED_CALLBACK 0
+#define FFS_FL_BOUND 1
+
+ /* Active function */
+ struct ffs_function *func;
+
+ /*
+ * Device name, write once when file system is mounted.
+ * Intended for user to read if she wants.
+ */
+ const char *dev_name;
+ /* Private data for our user (ie. gadget). Managed by user. */
+ void *private_data;
+
+ /* filled by __ffs_data_got_descs() */
+ /*
+ * raw_descs is what you kfree, real_descs points inside of raw_descs,
+ * where full speed, high speed and super speed descriptors start.
+ * real_descs_length is the length of all those descriptors.
+ */
+ const void *raw_descs_data;
+ const void *raw_descs;
+ unsigned raw_descs_length;
+ unsigned fs_descs_count;
+ unsigned hs_descs_count;
+ unsigned ss_descs_count;
+ unsigned ms_os_descs_count;
+ unsigned ms_os_descs_ext_prop_count;
+ unsigned ms_os_descs_ext_prop_name_len;
+ unsigned ms_os_descs_ext_prop_data_len;
+ void *ms_os_descs_ext_prop_avail;
+ void *ms_os_descs_ext_prop_name_avail;
+ void *ms_os_descs_ext_prop_data_avail;
+
+ unsigned short strings_count;
+ unsigned short interfaces_count;
+ unsigned short eps_count;
+ unsigned short _pad1;
+
+ /* filled by __ffs_data_got_strings() */
+ /* ids in stringtabs are set in functionfs_bind() */
+ const void *raw_strings;
+ struct usb_gadget_strings **stringtabs;
+
+ /*
+ * File system's super block, write once when file system is
+ * mounted.
+ */
+ struct super_block *sb;
+
+ /* File permissions, written once when fs is mounted */
+ struct ffs_file_perms {
+ umode_t mode;
+ kuid_t uid;
+ kgid_t gid;
+ } file_perms;
+
+ /*
+ * The endpoint files, filled by ffs_epfiles_create(),
+ * destroyed by ffs_epfiles_destroy().
+ */
+ struct ffs_epfile *epfiles;
+};
+
+
+struct f_fs_opts {
+ struct usb_function_instance func_inst;
+ struct ffs_dev *dev;
+ unsigned refcnt;
+ bool no_configfs;
+};
+
+static inline struct f_fs_opts *to_f_fs_opts(struct usb_function_instance *fi)
+{
+ return container_of(fi, struct f_fs_opts, func_inst);
+}
+
+#endif /* U_FFS_H */
--- /dev/null
+/*
+ * u_gether.h
+ *
+ * Utility definitions for the subset function
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_GETHER_H
+#define U_GETHER_H
+
+#include <linux/usb/composite.h>
+
+struct f_gether_opts {
+ struct usb_function_instance func_inst;
+ struct net_device *net;
+ bool bound;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+#endif /* U_GETHER_H */
--- /dev/null
+/*
+ * u_ncm.h
+ *
+ * Utility definitions for the ncm function
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_NCM_H
+#define U_NCM_H
+
+#include <linux/usb/composite.h>
+
+struct f_ncm_opts {
+ struct usb_function_instance func_inst;
+ struct net_device *net;
+ bool bound;
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+#endif /* U_NCM_H */
--- /dev/null
+/*
+ * u_phonet.h - interface to Phonet
+ *
+ * Copyright (C) 2007-2008 by Nokia Corporation
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * either version 2 of that License or (at your option) any later version.
+ */
+
+#ifndef __U_PHONET_H
+#define __U_PHONET_H
+
+#include <linux/usb/composite.h>
+#include <linux/usb/cdc.h>
+
+struct f_phonet_opts {
+ struct usb_function_instance func_inst;
+ bool bound;
+ struct net_device *net;
+};
+
+struct net_device *gphonet_setup_default(void);
+void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g);
+int gphonet_register_netdev(struct net_device *net);
+int phonet_bind_config(struct usb_configuration *c, struct net_device *dev);
+void gphonet_cleanup(struct net_device *dev);
+
+#endif /* __U_PHONET_H */
--- /dev/null
+/*
+ * u_rndis.h
+ *
+ * Utility definitions for the subset function
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_RNDIS_H
+#define U_RNDIS_H
+
+#include <linux/usb/composite.h>
+
+struct f_rndis_opts {
+ struct usb_function_instance func_inst;
+ u32 vendor_id;
+ const char *manufacturer;
+ struct net_device *net;
+ bool bound;
+ bool borrowed_net;
+
+ struct usb_os_desc rndis_os_desc;
+ char rndis_ext_compat_id[16];
+
+ /*
+ * Read/write access to configfs attributes is handled by configfs.
+ *
+ * This is to protect the data from concurrent access by read/write
+ * and create symlink/remove symlink.
+ */
+ struct mutex lock;
+ int refcnt;
+};
+
+int rndis_init(void);
+void rndis_exit(void);
+void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net);
+
+#endif /* U_RNDIS_H */
--- /dev/null
+/*
+ * u_serial.c - utilities for USB gadget "serial port"/TTY support
+ *
+ * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
+ * Copyright (C) 2008 David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This code also borrows from usbserial.c, which is
+ * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2000 Peter Berger (pberger@brimson.com)
+ * Copyright (C) 2000 Al Borchers (alborchers@steinerpoint.com)
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * either version 2 of that License or (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/module.h>
+
+#include "u_serial.h"
+
+
+/*
+ * This component encapsulates the TTY layer glue needed to provide basic
+ * "serial port" functionality through the USB gadget stack. Each such
+ * port is exposed through a /dev/ttyGS* node.
+ *
+ * After this module has been loaded, the individual TTY port can be requested
+ * (gserial_alloc_line()) and it will stay available until they are removed
+ * (gserial_free_line()). Each one may be connected to a USB function
+ * (gserial_connect), or disconnected (with gserial_disconnect) when the USB
+ * host issues a config change event. Data can only flow when the port is
+ * connected to the host.
+ *
+ * A given TTY port can be made available in multiple configurations.
+ * For example, each one might expose a ttyGS0 node which provides a
+ * login application. In one case that might use CDC ACM interface 0,
+ * while another configuration might use interface 3 for that. The
+ * work to handle that (including descriptor management) is not part
+ * of this component.
+ *
+ * Configurations may expose more than one TTY port. For example, if
+ * ttyGS0 provides login service, then ttyGS1 might provide dialer access
+ * for a telephone or fax link. And ttyGS2 might be something that just
+ * needs a simple byte stream interface for some messaging protocol that
+ * is managed in userspace ... OBEX, PTP, and MTP have been mentioned.
+ */
+
+#define PREFIX "ttyGS"
+
+/*
+ * gserial is the lifecycle interface, used by USB functions
+ * gs_port is the I/O nexus, used by the tty driver
+ * tty_struct links to the tty/filesystem framework
+ *
+ * gserial <---> gs_port ... links will be null when the USB link is
+ * inactive; managed by gserial_{connect,disconnect}(). each gserial
+ * instance can wrap its own USB control protocol.
+ * gserial->ioport == usb_ep->driver_data ... gs_port
+ * gs_port->port_usb ... gserial
+ *
+ * gs_port <---> tty_struct ... links will be null when the TTY file
+ * isn't opened; managed by gs_open()/gs_close()
+ * gserial->port_tty ... tty_struct
+ * tty_struct->driver_data ... gserial
+ */
+
+/* RX and TX queues can buffer QUEUE_SIZE packets before they hit the
+ * next layer of buffering. For TX that's a circular buffer; for RX
+ * consider it a NOP. A third layer is provided by the TTY code.
+ */
+#define QUEUE_SIZE 16
+#define WRITE_BUF_SIZE 8192 /* TX only */
+
+/* circular buffer */
+struct gs_buf {
+ unsigned buf_size;
+ char *buf_buf;
+ char *buf_get;
+ char *buf_put;
+};
+
+/*
+ * The port structure holds info for each port, one for each minor number
+ * (and thus for each /dev/ node).
+ */
+struct gs_port {
+ struct tty_port port;
+ spinlock_t port_lock; /* guard port_* access */
+
+ struct gserial *port_usb;
+
+ bool openclose; /* open/close in progress */
+ u8 port_num;
+
+ struct list_head read_pool;
+ int read_started;
+ int read_allocated;
+ struct list_head read_queue;
+ unsigned n_read;
+ struct tasklet_struct push;
+
+ struct list_head write_pool;
+ int write_started;
+ int write_allocated;
+ struct gs_buf port_write_buf;
+ wait_queue_head_t drain_wait; /* wait while writes drain */
+
+ /* REVISIT this state ... */
+ struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
+};
+
+static struct portmaster {
+ struct mutex lock; /* protect open/close */
+ struct gs_port *port;
+} ports[MAX_U_SERIAL_PORTS];
+
+#define GS_CLOSE_TIMEOUT 15 /* seconds */
+
+
+
+#ifdef VERBOSE_DEBUG
+#ifndef pr_vdebug
+#define pr_vdebug(fmt, arg...) \
+ pr_debug(fmt, ##arg)
+#endif /* pr_vdebug */
+#else
+#ifndef pr_vdebug
+#define pr_vdebug(fmt, arg...) \
+ ({ if (0) pr_debug(fmt, ##arg); })
+#endif /* pr_vdebug */
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/* Circular Buffer */
+
+/*
+ * gs_buf_alloc
+ *
+ * Allocate a circular buffer and all associated memory.
+ */
+static int gs_buf_alloc(struct gs_buf *gb, unsigned size)
+{
+ gb->buf_buf = kmalloc(size, GFP_KERNEL);
+ if (gb->buf_buf == NULL)
+ return -ENOMEM;
+
+ gb->buf_size = size;
+ gb->buf_put = gb->buf_buf;
+ gb->buf_get = gb->buf_buf;
+
+ return 0;
+}
+
+/*
+ * gs_buf_free
+ *
+ * Free the buffer and all associated memory.
+ */
+static void gs_buf_free(struct gs_buf *gb)
+{
+ kfree(gb->buf_buf);
+ gb->buf_buf = NULL;
+}
+
+/*
+ * gs_buf_clear
+ *
+ * Clear out all data in the circular buffer.
+ */
+static void gs_buf_clear(struct gs_buf *gb)
+{
+ gb->buf_get = gb->buf_put;
+ /* equivalent to a get of all data available */
+}
+
+/*
+ * gs_buf_data_avail
+ *
+ * Return the number of bytes of data written into the circular
+ * buffer.
+ */
+static unsigned gs_buf_data_avail(struct gs_buf *gb)
+{
+ return (gb->buf_size + gb->buf_put - gb->buf_get) % gb->buf_size;
+}
+
+/*
+ * gs_buf_space_avail
+ *
+ * Return the number of bytes of space available in the circular
+ * buffer.
+ */
+static unsigned gs_buf_space_avail(struct gs_buf *gb)
+{
+ return (gb->buf_size + gb->buf_get - gb->buf_put - 1) % gb->buf_size;
+}
+
+/*
+ * gs_buf_put
+ *
+ * Copy data data from a user buffer and put it into the circular buffer.
+ * Restrict to the amount of space available.
+ *
+ * Return the number of bytes copied.
+ */
+static unsigned
+gs_buf_put(struct gs_buf *gb, const char *buf, unsigned count)
+{
+ unsigned len;
+
+ len = gs_buf_space_avail(gb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = gb->buf_buf + gb->buf_size - gb->buf_put;
+ if (count > len) {
+ memcpy(gb->buf_put, buf, len);
+ memcpy(gb->buf_buf, buf+len, count - len);
+ gb->buf_put = gb->buf_buf + count - len;
+ } else {
+ memcpy(gb->buf_put, buf, count);
+ if (count < len)
+ gb->buf_put += count;
+ else /* count == len */
+ gb->buf_put = gb->buf_buf;
+ }
+
+ return count;
+}
+
+/*
+ * gs_buf_get
+ *
+ * Get data from the circular buffer and copy to the given buffer.
+ * Restrict to the amount of data available.
+ *
+ * Return the number of bytes copied.
+ */
+static unsigned
+gs_buf_get(struct gs_buf *gb, char *buf, unsigned count)
+{
+ unsigned len;
+
+ len = gs_buf_data_avail(gb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = gb->buf_buf + gb->buf_size - gb->buf_get;
+ if (count > len) {
+ memcpy(buf, gb->buf_get, len);
+ memcpy(buf+len, gb->buf_buf, count - len);
+ gb->buf_get = gb->buf_buf + count - len;
+ } else {
+ memcpy(buf, gb->buf_get, count);
+ if (count < len)
+ gb->buf_get += count;
+ else /* count == len */
+ gb->buf_get = gb->buf_buf;
+ }
+
+ return count;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* I/O glue between TTY (upper) and USB function (lower) driver layers */
+
+/*
+ * gs_alloc_req
+ *
+ * Allocate a usb_request and its buffer. Returns a pointer to the
+ * usb_request or NULL if there is an error.
+ */
+struct usb_request *
+gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t kmalloc_flags)
+{
+ struct usb_request *req;
+
+ req = usb_ep_alloc_request(ep, kmalloc_flags);
+
+ if (req != NULL) {
+ req->length = len;
+ req->buf = kmalloc(len, kmalloc_flags);
+ if (req->buf == NULL) {
+ usb_ep_free_request(ep, req);
+ return NULL;
+ }
+ }
+
+ return req;
+}
+EXPORT_SYMBOL_GPL(gs_alloc_req);
+
+/*
+ * gs_free_req
+ *
+ * Free a usb_request and its buffer.
+ */
+void gs_free_req(struct usb_ep *ep, struct usb_request *req)
+{
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+EXPORT_SYMBOL_GPL(gs_free_req);
+
+/*
+ * gs_send_packet
+ *
+ * If there is data to send, a packet is built in the given
+ * buffer and the size is returned. If there is no data to
+ * send, 0 is returned.
+ *
+ * Called with port_lock held.
+ */
+static unsigned
+gs_send_packet(struct gs_port *port, char *packet, unsigned size)
+{
+ unsigned len;
+
+ len = gs_buf_data_avail(&port->port_write_buf);
+ if (len < size)
+ size = len;
+ if (size != 0)
+ size = gs_buf_get(&port->port_write_buf, packet, size);
+ return size;
+}
+
+/*
+ * gs_start_tx
+ *
+ * This function finds available write requests, calls
+ * gs_send_packet to fill these packets with data, and
+ * continues until either there are no more write requests
+ * available or no more data to send. This function is
+ * run whenever data arrives or write requests are available.
+ *
+ * Context: caller owns port_lock; port_usb is non-null.
+ */
+static int gs_start_tx(struct gs_port *port)
+/*
+__releases(&port->port_lock)
+__acquires(&port->port_lock)
+*/
+{
+ struct list_head *pool = &port->write_pool;
+ struct usb_ep *in = port->port_usb->in;
+ int status = 0;
+ bool do_tty_wake = false;
+
+ while (!list_empty(pool)) {
+ struct usb_request *req;
+ int len;
+
+ if (port->write_started >= QUEUE_SIZE)
+ break;
+
+ req = list_entry(pool->next, struct usb_request, list);
+ len = gs_send_packet(port, req->buf, in->maxpacket);
+ if (len == 0) {
+ wake_up_interruptible(&port->drain_wait);
+ break;
+ }
+ do_tty_wake = true;
+
+ req->length = len;
+ list_del(&req->list);
+ req->zero = (gs_buf_data_avail(&port->port_write_buf) == 0);
+
+ pr_vdebug(PREFIX "%d: tx len=%d, 0x%02x 0x%02x 0x%02x ...\n",
+ port->port_num, len, *((u8 *)req->buf),
+ *((u8 *)req->buf+1), *((u8 *)req->buf+2));
+
+ /* Drop lock while we call out of driver; completions
+ * could be issued while we do so. Disconnection may
+ * happen too; maybe immediately before we queue this!
+ *
+ * NOTE that we may keep sending data for a while after
+ * the TTY closed (dev->ioport->port_tty is NULL).
+ */
+ spin_unlock(&port->port_lock);
+ status = usb_ep_queue(in, req, GFP_ATOMIC);
+ spin_lock(&port->port_lock);
+
+ if (status) {
+ pr_debug("%s: %s %s err %d\n",
+ __func__, "queue", in->name, status);
+ list_add(&req->list, pool);
+ break;
+ }
+
+ port->write_started++;
+
+ /* abort immediately after disconnect */
+ if (!port->port_usb)
+ break;
+ }
+
+ if (do_tty_wake && port->port.tty)
+ tty_wakeup(port->port.tty);
+ return status;
+}
+
+/*
+ * Context: caller owns port_lock, and port_usb is set
+ */
+static unsigned gs_start_rx(struct gs_port *port)
+/*
+__releases(&port->port_lock)
+__acquires(&port->port_lock)
+*/
+{
+ struct list_head *pool = &port->read_pool;
+ struct usb_ep *out = port->port_usb->out;
+
+ while (!list_empty(pool)) {
+ struct usb_request *req;
+ int status;
+ struct tty_struct *tty;
+
+ /* no more rx if closed */
+ tty = port->port.tty;
+ if (!tty)
+ break;
+
+ if (port->read_started >= QUEUE_SIZE)
+ break;
+
+ req = list_entry(pool->next, struct usb_request, list);
+ list_del(&req->list);
+ req->length = out->maxpacket;
+
+ /* drop lock while we call out; the controller driver
+ * may need to call us back (e.g. for disconnect)
+ */
+ spin_unlock(&port->port_lock);
+ status = usb_ep_queue(out, req, GFP_ATOMIC);
+ spin_lock(&port->port_lock);
+
+ if (status) {
+ pr_debug("%s: %s %s err %d\n",
+ __func__, "queue", out->name, status);
+ list_add(&req->list, pool);
+ break;
+ }
+ port->read_started++;
+
+ /* abort immediately after disconnect */
+ if (!port->port_usb)
+ break;
+ }
+ return port->read_started;
+}
+
+/*
+ * RX tasklet takes data out of the RX queue and hands it up to the TTY
+ * layer until it refuses to take any more data (or is throttled back).
+ * Then it issues reads for any further data.
+ *
+ * If the RX queue becomes full enough that no usb_request is queued,
+ * the OUT endpoint may begin NAKing as soon as its FIFO fills up.
+ * So QUEUE_SIZE packets plus however many the FIFO holds (usually two)
+ * can be buffered before the TTY layer's buffers (currently 64 KB).
+ */
+static void gs_rx_push(unsigned long _port)
+{
+ struct gs_port *port = (void *)_port;
+ struct tty_struct *tty;
+ struct list_head *queue = &port->read_queue;
+ bool disconnect = false;
+ bool do_push = false;
+
+ /* hand any queued data to the tty */
+ spin_lock_irq(&port->port_lock);
+ tty = port->port.tty;
+ while (!list_empty(queue)) {
+ struct usb_request *req;
+
+ req = list_first_entry(queue, struct usb_request, list);
+
+ /* leave data queued if tty was rx throttled */
+ if (tty && test_bit(TTY_THROTTLED, &tty->flags))
+ break;
+
+ switch (req->status) {
+ case -ESHUTDOWN:
+ disconnect = true;
+ pr_vdebug(PREFIX "%d: shutdown\n", port->port_num);
+ break;
+
+ default:
+ /* presumably a transient fault */
+ pr_warning(PREFIX "%d: unexpected RX status %d\n",
+ port->port_num, req->status);
+ /* FALLTHROUGH */
+ case 0:
+ /* normal completion */
+ break;
+ }
+
+ /* push data to (open) tty */
+ if (req->actual) {
+ char *packet = req->buf;
+ unsigned size = req->actual;
+ unsigned n;
+ int count;
+
+ /* we may have pushed part of this packet already... */
+ n = port->n_read;
+ if (n) {
+ packet += n;
+ size -= n;
+ }
+
+ count = tty_insert_flip_string(&port->port, packet,
+ size);
+ if (count)
+ do_push = true;
+ if (count != size) {
+ /* stop pushing; TTY layer can't handle more */
+ port->n_read += count;
+ pr_vdebug(PREFIX "%d: rx block %d/%d\n",
+ port->port_num,
+ count, req->actual);
+ break;
+ }
+ port->n_read = 0;
+ }
+
+ list_move(&req->list, &port->read_pool);
+ port->read_started--;
+ }
+
+ /* Push from tty to ldisc; this is handled by a workqueue,
+ * so we won't get callbacks and can hold port_lock
+ */
+ if (do_push)
+ tty_flip_buffer_push(&port->port);
+
+
+ /* We want our data queue to become empty ASAP, keeping data
+ * in the tty and ldisc (not here). If we couldn't push any
+ * this time around, there may be trouble unless there's an
+ * implicit tty_unthrottle() call on its way...
+ *
+ * REVISIT we should probably add a timer to keep the tasklet
+ * from starving ... but it's not clear that case ever happens.
+ */
+ if (!list_empty(queue) && tty) {
+ if (!test_bit(TTY_THROTTLED, &tty->flags)) {
+ if (do_push)
+ tasklet_schedule(&port->push);
+ else
+ pr_warning(PREFIX "%d: RX not scheduled?\n",
+ port->port_num);
+ }
+ }
+
+ /* If we're still connected, refill the USB RX queue. */
+ if (!disconnect && port->port_usb)
+ gs_start_rx(port);
+
+ spin_unlock_irq(&port->port_lock);
+}
+
+static void gs_read_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct gs_port *port = ep->driver_data;
+
+ /* Queue all received data until the tty layer is ready for it. */
+ spin_lock(&port->port_lock);
+ list_add_tail(&req->list, &port->read_queue);
+ tasklet_schedule(&port->push);
+ spin_unlock(&port->port_lock);
+}
+
+static void gs_write_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct gs_port *port = ep->driver_data;
+
+ spin_lock(&port->port_lock);
+ list_add(&req->list, &port->write_pool);
+ port->write_started--;
+
+ switch (req->status) {
+ default:
+ /* presumably a transient fault */
+ pr_warning("%s: unexpected %s status %d\n",
+ __func__, ep->name, req->status);
+ /* FALL THROUGH */
+ case 0:
+ /* normal completion */
+ gs_start_tx(port);
+ break;
+
+ case -ESHUTDOWN:
+ /* disconnect */
+ pr_vdebug("%s: %s shutdown\n", __func__, ep->name);
+ break;
+ }
+
+ spin_unlock(&port->port_lock);
+}
+
+static void gs_free_requests(struct usb_ep *ep, struct list_head *head,
+ int *allocated)
+{
+ struct usb_request *req;
+
+ while (!list_empty(head)) {
+ req = list_entry(head->next, struct usb_request, list);
+ list_del(&req->list);
+ gs_free_req(ep, req);
+ if (allocated)
+ (*allocated)--;
+ }
+}
+
+static int gs_alloc_requests(struct usb_ep *ep, struct list_head *head,
+ void (*fn)(struct usb_ep *, struct usb_request *),
+ int *allocated)
+{
+ int i;
+ struct usb_request *req;
+ int n = allocated ? QUEUE_SIZE - *allocated : QUEUE_SIZE;
+
+ /* Pre-allocate up to QUEUE_SIZE transfers, but if we can't
+ * do quite that many this time, don't fail ... we just won't
+ * be as speedy as we might otherwise be.
+ */
+ for (i = 0; i < n; i++) {
+ req = gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC);
+ if (!req)
+ return list_empty(head) ? -ENOMEM : 0;
+ req->complete = fn;
+ list_add_tail(&req->list, head);
+ if (allocated)
+ (*allocated)++;
+ }
+ return 0;
+}
+
+/**
+ * gs_start_io - start USB I/O streams
+ * @dev: encapsulates endpoints to use
+ * Context: holding port_lock; port_tty and port_usb are non-null
+ *
+ * We only start I/O when something is connected to both sides of
+ * this port. If nothing is listening on the host side, we may
+ * be pointlessly filling up our TX buffers and FIFO.
+ */
+static int gs_start_io(struct gs_port *port)
+{
+ struct list_head *head = &port->read_pool;
+ struct usb_ep *ep = port->port_usb->out;
+ int status;
+ unsigned started;
+
+ /* Allocate RX and TX I/O buffers. We can't easily do this much
+ * earlier (with GFP_KERNEL) because the requests are coupled to
+ * endpoints, as are the packet sizes we'll be using. Different
+ * configurations may use different endpoints with a given port;
+ * and high speed vs full speed changes packet sizes too.
+ */
+ status = gs_alloc_requests(ep, head, gs_read_complete,
+ &port->read_allocated);
+ if (status)
+ return status;
+
+ status = gs_alloc_requests(port->port_usb->in, &port->write_pool,
+ gs_write_complete, &port->write_allocated);
+ if (status) {
+ gs_free_requests(ep, head, &port->read_allocated);
+ return status;
+ }
+
+ /* queue read requests */
+ port->n_read = 0;
+ started = gs_start_rx(port);
+
+ /* unblock any pending writes into our circular buffer */
+ if (started) {
+ tty_wakeup(port->port.tty);
+ } else {
+ gs_free_requests(ep, head, &port->read_allocated);
+ gs_free_requests(port->port_usb->in, &port->write_pool,
+ &port->write_allocated);
+ status = -EIO;
+ }
+
+ return status;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* TTY Driver */
+
+/*
+ * gs_open sets up the link between a gs_port and its associated TTY.
+ * That link is broken *only* by TTY close(), and all driver methods
+ * know that.
+ */
+static int gs_open(struct tty_struct *tty, struct file *file)
+{
+ int port_num = tty->index;
+ struct gs_port *port;
+ int status;
+
+ do {
+ mutex_lock(&ports[port_num].lock);
+ port = ports[port_num].port;
+ if (!port)
+ status = -ENODEV;
+ else {
+ spin_lock_irq(&port->port_lock);
+
+ /* already open? Great. */
+ if (port->port.count) {
+ status = 0;
+ port->port.count++;
+
+ /* currently opening/closing? wait ... */
+ } else if (port->openclose) {
+ status = -EBUSY;
+
+ /* ... else we do the work */
+ } else {
+ status = -EAGAIN;
+ port->openclose = true;
+ }
+ spin_unlock_irq(&port->port_lock);
+ }
+ mutex_unlock(&ports[port_num].lock);
+
+ switch (status) {
+ default:
+ /* fully handled */
+ return status;
+ case -EAGAIN:
+ /* must do the work */
+ break;
+ case -EBUSY:
+ /* wait for EAGAIN task to finish */
+ msleep(1);
+ /* REVISIT could have a waitchannel here, if
+ * concurrent open performance is important
+ */
+ break;
+ }
+ } while (status != -EAGAIN);
+
+ /* Do the "real open" */
+ spin_lock_irq(&port->port_lock);
+
+ /* allocate circular buffer on first open */
+ if (port->port_write_buf.buf_buf == NULL) {
+
+ spin_unlock_irq(&port->port_lock);
+ status = gs_buf_alloc(&port->port_write_buf, WRITE_BUF_SIZE);
+ spin_lock_irq(&port->port_lock);
+
+ if (status) {
+ pr_debug("gs_open: ttyGS%d (%p,%p) no buffer\n",
+ port->port_num, tty, file);
+ port->openclose = false;
+ goto exit_unlock_port;
+ }
+ }
+
+ /* REVISIT if REMOVED (ports[].port NULL), abort the open
+ * to let rmmod work faster (but this way isn't wrong).
+ */
+
+ /* REVISIT maybe wait for "carrier detect" */
+
+ tty->driver_data = port;
+ port->port.tty = tty;
+
+ port->port.count = 1;
+ port->openclose = false;
+
+ /* if connected, start the I/O stream */
+ if (port->port_usb) {
+ struct gserial *gser = port->port_usb;
+
+ pr_debug("gs_open: start ttyGS%d\n", port->port_num);
+ gs_start_io(port);
+
+ if (gser->connect)
+ gser->connect(gser);
+ }
+
+ pr_debug("gs_open: ttyGS%d (%p,%p)\n", port->port_num, tty, file);
+
+ status = 0;
+
+exit_unlock_port:
+ spin_unlock_irq(&port->port_lock);
+ return status;
+}
+
+static int gs_writes_finished(struct gs_port *p)
+{
+ int cond;
+
+ /* return true on disconnect or empty buffer */
+ spin_lock_irq(&p->port_lock);
+ cond = (p->port_usb == NULL) || !gs_buf_data_avail(&p->port_write_buf);
+ spin_unlock_irq(&p->port_lock);
+
+ return cond;
+}
+
+static void gs_close(struct tty_struct *tty, struct file *file)
+{
+ struct gs_port *port = tty->driver_data;
+ struct gserial *gser;
+
+ spin_lock_irq(&port->port_lock);
+
+ if (port->port.count != 1) {
+ if (port->port.count == 0)
+ WARN_ON(1);
+ else
+ --port->port.count;
+ goto exit;
+ }
+
+ pr_debug("gs_close: ttyGS%d (%p,%p) ...\n", port->port_num, tty, file);
+
+ /* mark port as closing but in use; we can drop port lock
+ * and sleep if necessary
+ */
+ port->openclose = true;
+ port->port.count = 0;
+
+ gser = port->port_usb;
+ if (gser && gser->disconnect)
+ gser->disconnect(gser);
+
+ /* wait for circular write buffer to drain, disconnect, or at
+ * most GS_CLOSE_TIMEOUT seconds; then discard the rest
+ */
+ if (gs_buf_data_avail(&port->port_write_buf) > 0 && gser) {
+ spin_unlock_irq(&port->port_lock);
+ wait_event_interruptible_timeout(port->drain_wait,
+ gs_writes_finished(port),
+ GS_CLOSE_TIMEOUT * HZ);
+ spin_lock_irq(&port->port_lock);
+ gser = port->port_usb;
+ }
+
+ /* Iff we're disconnected, there can be no I/O in flight so it's
+ * ok to free the circular buffer; else just scrub it. And don't
+ * let the push tasklet fire again until we're re-opened.
+ */
+ if (gser == NULL)
+ gs_buf_free(&port->port_write_buf);
+ else
+ gs_buf_clear(&port->port_write_buf);
+
+ tty->driver_data = NULL;
+ port->port.tty = NULL;
+
+ port->openclose = false;
+
+ pr_debug("gs_close: ttyGS%d (%p,%p) done!\n",
+ port->port_num, tty, file);
+
+ wake_up(&port->port.close_wait);
+exit:
+ spin_unlock_irq(&port->port_lock);
+}
+
+static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ struct gs_port *port = tty->driver_data;
+ unsigned long flags;
+ int status;
+
+ pr_vdebug("gs_write: ttyGS%d (%p) writing %d bytes\n",
+ port->port_num, tty, count);
+
+ spin_lock_irqsave(&port->port_lock, flags);
+ if (count)
+ count = gs_buf_put(&port->port_write_buf, buf, count);
+ /* treat count == 0 as flush_chars() */
+ if (port->port_usb)
+ status = gs_start_tx(port);
+ spin_unlock_irqrestore(&port->port_lock, flags);
+
+ return count;
+}
+
+static int gs_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct gs_port *port = tty->driver_data;
+ unsigned long flags;
+ int status;
+
+ pr_vdebug("gs_put_char: (%d,%p) char=0x%x, called from %pf\n",
+ port->port_num, tty, ch, __builtin_return_address(0));
+
+ spin_lock_irqsave(&port->port_lock, flags);
+ status = gs_buf_put(&port->port_write_buf, &ch, 1);
+ spin_unlock_irqrestore(&port->port_lock, flags);
+
+ return status;
+}
+
+static void gs_flush_chars(struct tty_struct *tty)
+{
+ struct gs_port *port = tty->driver_data;
+ unsigned long flags;
+
+ pr_vdebug("gs_flush_chars: (%d,%p)\n", port->port_num, tty);
+
+ spin_lock_irqsave(&port->port_lock, flags);
+ if (port->port_usb)
+ gs_start_tx(port);
+ spin_unlock_irqrestore(&port->port_lock, flags);
+}
+
+static int gs_write_room(struct tty_struct *tty)
+{
+ struct gs_port *port = tty->driver_data;
+ unsigned long flags;
+ int room = 0;
+
+ spin_lock_irqsave(&port->port_lock, flags);
+ if (port->port_usb)
+ room = gs_buf_space_avail(&port->port_write_buf);
+ spin_unlock_irqrestore(&port->port_lock, flags);
+
+ pr_vdebug("gs_write_room: (%d,%p) room=%d\n",
+ port->port_num, tty, room);
+
+ return room;
+}
+
+static int gs_chars_in_buffer(struct tty_struct *tty)
+{
+ struct gs_port *port = tty->driver_data;
+ unsigned long flags;
+ int chars = 0;
+
+ spin_lock_irqsave(&port->port_lock, flags);
+ chars = gs_buf_data_avail(&port->port_write_buf);
+ spin_unlock_irqrestore(&port->port_lock, flags);
+
+ pr_vdebug("gs_chars_in_buffer: (%d,%p) chars=%d\n",
+ port->port_num, tty, chars);
+
+ return chars;
+}
+
+/* undo side effects of setting TTY_THROTTLED */
+static void gs_unthrottle(struct tty_struct *tty)
+{
+ struct gs_port *port = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->port_lock, flags);
+ if (port->port_usb) {
+ /* Kickstart read queue processing. We don't do xon/xoff,
+ * rts/cts, or other handshaking with the host, but if the
+ * read queue backs up enough we'll be NAKing OUT packets.
+ */
+ tasklet_schedule(&port->push);
+ pr_vdebug(PREFIX "%d: unthrottle\n", port->port_num);
+ }
+ spin_unlock_irqrestore(&port->port_lock, flags);
+}
+
+static int gs_break_ctl(struct tty_struct *tty, int duration)
+{
+ struct gs_port *port = tty->driver_data;
+ int status = 0;
+ struct gserial *gser;
+
+ pr_vdebug("gs_break_ctl: ttyGS%d, send break (%d) \n",
+ port->port_num, duration);
+
+ spin_lock_irq(&port->port_lock);
+ gser = port->port_usb;
+ if (gser && gser->send_break)
+ status = gser->send_break(gser, duration);
+ spin_unlock_irq(&port->port_lock);
+
+ return status;
+}
+
+static const struct tty_operations gs_tty_ops = {
+ .open = gs_open,
+ .close = gs_close,
+ .write = gs_write,
+ .put_char = gs_put_char,
+ .flush_chars = gs_flush_chars,
+ .write_room = gs_write_room,
+ .chars_in_buffer = gs_chars_in_buffer,
+ .unthrottle = gs_unthrottle,
+ .break_ctl = gs_break_ctl,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static struct tty_driver *gs_tty_driver;
+
+static int
+gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding)
+{
+ struct gs_port *port;
+ int ret = 0;
+
+ mutex_lock(&ports[port_num].lock);
+ if (ports[port_num].port) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ port = kzalloc(sizeof(struct gs_port), GFP_KERNEL);
+ if (port == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ tty_port_init(&port->port);
+ spin_lock_init(&port->port_lock);
+ init_waitqueue_head(&port->drain_wait);
+
+ tasklet_init(&port->push, gs_rx_push, (unsigned long) port);
+
+ INIT_LIST_HEAD(&port->read_pool);
+ INIT_LIST_HEAD(&port->read_queue);
+ INIT_LIST_HEAD(&port->write_pool);
+
+ port->port_num = port_num;
+ port->port_line_coding = *coding;
+
+ ports[port_num].port = port;
+out:
+ mutex_unlock(&ports[port_num].lock);
+ return ret;
+}
+
+static int gs_closed(struct gs_port *port)
+{
+ int cond;
+
+ spin_lock_irq(&port->port_lock);
+ cond = (port->port.count == 0) && !port->openclose;
+ spin_unlock_irq(&port->port_lock);
+ return cond;
+}
+
+static void gserial_free_port(struct gs_port *port)
+{
+ tasklet_kill(&port->push);
+ /* wait for old opens to finish */
+ wait_event(port->port.close_wait, gs_closed(port));
+ WARN_ON(port->port_usb != NULL);
+ tty_port_destroy(&port->port);
+ kfree(port);
+}
+
+void gserial_free_line(unsigned char port_num)
+{
+ struct gs_port *port;
+
+ mutex_lock(&ports[port_num].lock);
+ if (WARN_ON(!ports[port_num].port)) {
+ mutex_unlock(&ports[port_num].lock);
+ return;
+ }
+ port = ports[port_num].port;
+ ports[port_num].port = NULL;
+ mutex_unlock(&ports[port_num].lock);
+
+ gserial_free_port(port);
+ tty_unregister_device(gs_tty_driver, port_num);
+}
+EXPORT_SYMBOL_GPL(gserial_free_line);
+
+int gserial_alloc_line(unsigned char *line_num)
+{
+ struct usb_cdc_line_coding coding;
+ struct device *tty_dev;
+ int ret;
+ int port_num;
+
+ coding.dwDTERate = cpu_to_le32(9600);
+ coding.bCharFormat = 8;
+ coding.bParityType = USB_CDC_NO_PARITY;
+ coding.bDataBits = USB_CDC_1_STOP_BITS;
+
+ for (port_num = 0; port_num < MAX_U_SERIAL_PORTS; port_num++) {
+ ret = gs_port_alloc(port_num, &coding);
+ if (ret == -EBUSY)
+ continue;
+ if (ret)
+ return ret;
+ break;
+ }
+ if (ret)
+ return ret;
+
+ /* ... and sysfs class devices, so mdev/udev make /dev/ttyGS* */
+
+ tty_dev = tty_port_register_device(&ports[port_num].port->port,
+ gs_tty_driver, port_num, NULL);
+ if (IS_ERR(tty_dev)) {
+ struct gs_port *port;
+ pr_err("%s: failed to register tty for port %d, err %ld\n",
+ __func__, port_num, PTR_ERR(tty_dev));
+
+ ret = PTR_ERR(tty_dev);
+ port = ports[port_num].port;
+ ports[port_num].port = NULL;
+ gserial_free_port(port);
+ goto err;
+ }
+ *line_num = port_num;
+err:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(gserial_alloc_line);
+
+/**
+ * gserial_connect - notify TTY I/O glue that USB link is active
+ * @gser: the function, set up with endpoints and descriptors
+ * @port_num: which port is active
+ * Context: any (usually from irq)
+ *
+ * This is called activate endpoints and let the TTY layer know that
+ * the connection is active ... not unlike "carrier detect". It won't
+ * necessarily start I/O queues; unless the TTY is held open by any
+ * task, there would be no point. However, the endpoints will be
+ * activated so the USB host can perform I/O, subject to basic USB
+ * hardware flow control.
+ *
+ * Caller needs to have set up the endpoints and USB function in @dev
+ * before calling this, as well as the appropriate (speed-specific)
+ * endpoint descriptors, and also have allocate @port_num by calling
+ * @gserial_alloc_line().
+ *
+ * Returns negative errno or zero.
+ * On success, ep->driver_data will be overwritten.
+ */
+int gserial_connect(struct gserial *gser, u8 port_num)
+{
+ struct gs_port *port;
+ unsigned long flags;
+ int status;
+
+ if (port_num >= MAX_U_SERIAL_PORTS)
+ return -ENXIO;
+
+ port = ports[port_num].port;
+ if (!port) {
+ pr_err("serial line %d not allocated.\n", port_num);
+ return -EINVAL;
+ }
+ if (port->port_usb) {
+ pr_err("serial line %d is in use.\n", port_num);
+ return -EBUSY;
+ }
+
+ /* activate the endpoints */
+ status = usb_ep_enable(gser->in);
+ if (status < 0)
+ return status;
+ gser->in->driver_data = port;
+
+ status = usb_ep_enable(gser->out);
+ if (status < 0)
+ goto fail_out;
+ gser->out->driver_data = port;
+
+ /* then tell the tty glue that I/O can work */
+ spin_lock_irqsave(&port->port_lock, flags);
+ gser->ioport = port;
+ port->port_usb = gser;
+
+ /* REVISIT unclear how best to handle this state...
+ * we don't really couple it with the Linux TTY.
+ */
+ gser->port_line_coding = port->port_line_coding;
+
+ /* REVISIT if waiting on "carrier detect", signal. */
+
+ /* if it's already open, start I/O ... and notify the serial
+ * protocol about open/close status (connect/disconnect).
+ */
+ if (port->port.count) {
+ pr_debug("gserial_connect: start ttyGS%d\n", port->port_num);
+ gs_start_io(port);
+ if (gser->connect)
+ gser->connect(gser);
+ } else {
+ if (gser->disconnect)
+ gser->disconnect(gser);
+ }
+
+ spin_unlock_irqrestore(&port->port_lock, flags);
+
+ return status;
+
+fail_out:
+ usb_ep_disable(gser->in);
+ gser->in->driver_data = NULL;
+ return status;
+}
+EXPORT_SYMBOL_GPL(gserial_connect);
+/**
+ * gserial_disconnect - notify TTY I/O glue that USB link is inactive
+ * @gser: the function, on which gserial_connect() was called
+ * Context: any (usually from irq)
+ *
+ * This is called to deactivate endpoints and let the TTY layer know
+ * that the connection went inactive ... not unlike "hangup".
+ *
+ * On return, the state is as if gserial_connect() had never been called;
+ * there is no active USB I/O on these endpoints.
+ */
+void gserial_disconnect(struct gserial *gser)
+{
+ struct gs_port *port = gser->ioport;
+ unsigned long flags;
+
+ if (!port)
+ return;
+
+ /* tell the TTY glue not to do I/O here any more */
+ spin_lock_irqsave(&port->port_lock, flags);
+
+ /* REVISIT as above: how best to track this? */
+ port->port_line_coding = gser->port_line_coding;
+
+ port->port_usb = NULL;
+ gser->ioport = NULL;
+ if (port->port.count > 0 || port->openclose) {
+ wake_up_interruptible(&port->drain_wait);
+ if (port->port.tty)
+ tty_hangup(port->port.tty);
+ }
+ spin_unlock_irqrestore(&port->port_lock, flags);
+
+ /* disable endpoints, aborting down any active I/O */
+ usb_ep_disable(gser->out);
+ gser->out->driver_data = NULL;
+
+ usb_ep_disable(gser->in);
+ gser->in->driver_data = NULL;
+
+ /* finally, free any unused/unusable I/O buffers */
+ spin_lock_irqsave(&port->port_lock, flags);
+ if (port->port.count == 0 && !port->openclose)
+ gs_buf_free(&port->port_write_buf);
+ gs_free_requests(gser->out, &port->read_pool, NULL);
+ gs_free_requests(gser->out, &port->read_queue, NULL);
+ gs_free_requests(gser->in, &port->write_pool, NULL);
+
+ port->read_allocated = port->read_started =
+ port->write_allocated = port->write_started = 0;
+
+ spin_unlock_irqrestore(&port->port_lock, flags);
+}
+EXPORT_SYMBOL_GPL(gserial_disconnect);
+
+static int userial_init(void)
+{
+ unsigned i;
+ int status;
+
+ gs_tty_driver = alloc_tty_driver(MAX_U_SERIAL_PORTS);
+ if (!gs_tty_driver)
+ return -ENOMEM;
+
+ gs_tty_driver->driver_name = "g_serial";
+ gs_tty_driver->name = PREFIX;
+ /* uses dynamically assigned dev_t values */
+
+ gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ gs_tty_driver->subtype = SERIAL_TYPE_NORMAL;
+ gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ gs_tty_driver->init_termios = tty_std_termios;
+
+ /* 9600-8-N-1 ... matches defaults expected by "usbser.sys" on
+ * MS-Windows. Otherwise, most of these flags shouldn't affect
+ * anything unless we were to actually hook up to a serial line.
+ */
+ gs_tty_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ gs_tty_driver->init_termios.c_ispeed = 9600;
+ gs_tty_driver->init_termios.c_ospeed = 9600;
+
+ tty_set_operations(gs_tty_driver, &gs_tty_ops);
+ for (i = 0; i < MAX_U_SERIAL_PORTS; i++)
+ mutex_init(&ports[i].lock);
+
+ /* export the driver ... */
+ status = tty_register_driver(gs_tty_driver);
+ if (status) {
+ pr_err("%s: cannot register, err %d\n",
+ __func__, status);
+ goto fail;
+ }
+
+ pr_debug("%s: registered %d ttyGS* device%s\n", __func__,
+ MAX_U_SERIAL_PORTS,
+ (MAX_U_SERIAL_PORTS == 1) ? "" : "s");
+
+ return status;
+fail:
+ put_tty_driver(gs_tty_driver);
+ gs_tty_driver = NULL;
+ return status;
+}
+module_init(userial_init);
+
+static void userial_cleanup(void)
+{
+ tty_unregister_driver(gs_tty_driver);
+ put_tty_driver(gs_tty_driver);
+ gs_tty_driver = NULL;
+}
+module_exit(userial_cleanup);
+
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * u_serial.h - interface to USB gadget "serial port"/TTY utilities
+ *
+ * Copyright (C) 2008 David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * either version 2 of that License or (at your option) any later version.
+ */
+
+#ifndef __U_SERIAL_H
+#define __U_SERIAL_H
+
+#include <linux/usb/composite.h>
+#include <linux/usb/cdc.h>
+
+#define MAX_U_SERIAL_PORTS 4
+
+struct f_serial_opts {
+ struct usb_function_instance func_inst;
+ u8 port_num;
+};
+
+/*
+ * One non-multiplexed "serial" I/O port ... there can be several of these
+ * on any given USB peripheral device, if it provides enough endpoints.
+ *
+ * The "u_serial" utility component exists to do one thing: manage TTY
+ * style I/O using the USB peripheral endpoints listed here, including
+ * hookups to sysfs and /dev for each logical "tty" device.
+ *
+ * REVISIT at least ACM could support tiocmget() if needed.
+ *
+ * REVISIT someday, allow multiplexing several TTYs over these endpoints.
+ */
+struct gserial {
+ struct usb_function func;
+
+ /* port is managed by gserial_{connect,disconnect} */
+ struct gs_port *ioport;
+
+ struct usb_ep *in;
+ struct usb_ep *out;
+
+ /* REVISIT avoid this CDC-ACM support harder ... */
+ struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
+
+ /* notification callbacks */
+ void (*connect)(struct gserial *p);
+ void (*disconnect)(struct gserial *p);
+ int (*send_break)(struct gserial *p, int duration);
+};
+
+/* utilities to allocate/free request and buffer */
+struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t flags);
+void gs_free_req(struct usb_ep *, struct usb_request *req);
+
+/* management of individual TTY ports */
+int gserial_alloc_line(unsigned char *port_line);
+void gserial_free_line(unsigned char port_line);
+
+/* connect/disconnect is handled by individual functions */
+int gserial_connect(struct gserial *, u8 port_num);
+void gserial_disconnect(struct gserial *);
+
+/* functions are bound to configurations by a config or gadget driver */
+int gser_bind_config(struct usb_configuration *c, u8 port_num);
+int obex_bind_config(struct usb_configuration *c, u8 port_num);
+
+#endif /* __U_SERIAL_H */
--- /dev/null
+/*
+ * u_uac1.c -- ALSA audio utilities for Gadget stack
+ *
+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
+ * Copyright (C) 2008 Analog Devices, Inc
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/ctype.h>
+#include <linux/random.h>
+#include <linux/syscalls.h>
+
+#include "u_uac1.h"
+
+/*
+ * This component encapsulates the ALSA devices for USB audio gadget
+ */
+
+#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p"
+#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c"
+#define FILE_CONTROL "/dev/snd/controlC0"
+
+static char *fn_play = FILE_PCM_PLAYBACK;
+module_param(fn_play, charp, S_IRUGO);
+MODULE_PARM_DESC(fn_play, "Playback PCM device file name");
+
+static char *fn_cap = FILE_PCM_CAPTURE;
+module_param(fn_cap, charp, S_IRUGO);
+MODULE_PARM_DESC(fn_cap, "Capture PCM device file name");
+
+static char *fn_cntl = FILE_CONTROL;
+module_param(fn_cntl, charp, S_IRUGO);
+MODULE_PARM_DESC(fn_cntl, "Control device file name");
+
+/*-------------------------------------------------------------------------*/
+
+/**
+ * Some ALSA internal helper functions
+ */
+static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
+{
+ struct snd_interval t;
+ t.empty = 0;
+ t.min = t.max = val;
+ t.openmin = t.openmax = 0;
+ t.integer = 1;
+ return snd_interval_refine(i, &t);
+}
+
+static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int dir)
+{
+ int changed;
+ if (hw_is_mask(var)) {
+ struct snd_mask *m = hw_param_mask(params, var);
+ if (val == 0 && dir < 0) {
+ changed = -EINVAL;
+ snd_mask_none(m);
+ } else {
+ if (dir > 0)
+ val++;
+ else if (dir < 0)
+ val--;
+ changed = snd_mask_refine_set(
+ hw_param_mask(params, var), val);
+ }
+ } else if (hw_is_interval(var)) {
+ struct snd_interval *i = hw_param_interval(params, var);
+ if (val == 0 && dir < 0) {
+ changed = -EINVAL;
+ snd_interval_none(i);
+ } else if (dir == 0)
+ changed = snd_interval_refine_set(i, val);
+ else {
+ struct snd_interval t;
+ t.openmin = 1;
+ t.openmax = 1;
+ t.empty = 0;
+ t.integer = 0;
+ if (dir < 0) {
+ t.min = val - 1;
+ t.max = val;
+ } else {
+ t.min = val;
+ t.max = val+1;
+ }
+ changed = snd_interval_refine(i, &t);
+ }
+ } else
+ return -EINVAL;
+ if (changed) {
+ params->cmask |= 1 << var;
+ params->rmask |= 1 << var;
+ }
+ return changed;
+}
+/*-------------------------------------------------------------------------*/
+
+/**
+ * Set default hardware params
+ */
+static int playback_default_hw_params(struct gaudio_snd_dev *snd)
+{
+ struct snd_pcm_substream *substream = snd->substream;
+ struct snd_pcm_hw_params *params;
+ snd_pcm_sframes_t result;
+
+ /*
+ * SNDRV_PCM_ACCESS_RW_INTERLEAVED,
+ * SNDRV_PCM_FORMAT_S16_LE
+ * CHANNELS: 2
+ * RATE: 48000
+ */
+ snd->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
+ snd->format = SNDRV_PCM_FORMAT_S16_LE;
+ snd->channels = 2;
+ snd->rate = 48000;
+
+ params = kzalloc(sizeof(*params), GFP_KERNEL);
+ if (!params)
+ return -ENOMEM;
+
+ _snd_pcm_hw_params_any(params);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
+ snd->access, 0);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
+ snd->format, 0);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
+ snd->channels, 0);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
+ snd->rate, 0);
+
+ snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+ snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, params);
+
+ result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
+ if (result < 0) {
+ ERROR(snd->card,
+ "Preparing sound card failed: %d\n", (int)result);
+ kfree(params);
+ return result;
+ }
+
+ /* Store the hardware parameters */
+ snd->access = params_access(params);
+ snd->format = params_format(params);
+ snd->channels = params_channels(params);
+ snd->rate = params_rate(params);
+
+ kfree(params);
+
+ INFO(snd->card,
+ "Hardware params: access %x, format %x, channels %d, rate %d\n",
+ snd->access, snd->format, snd->channels, snd->rate);
+
+ return 0;
+}
+
+/**
+ * Playback audio buffer data by ALSA PCM device
+ */
+static size_t u_audio_playback(struct gaudio *card, void *buf, size_t count)
+{
+ struct gaudio_snd_dev *snd = &card->playback;
+ struct snd_pcm_substream *substream = snd->substream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ mm_segment_t old_fs;
+ ssize_t result;
+ snd_pcm_sframes_t frames;
+
+try_again:
+ if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
+ runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
+ result = snd_pcm_kernel_ioctl(substream,
+ SNDRV_PCM_IOCTL_PREPARE, NULL);
+ if (result < 0) {
+ ERROR(card, "Preparing sound card failed: %d\n",
+ (int)result);
+ return result;
+ }
+ }
+
+ frames = bytes_to_frames(runtime, count);
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ result = snd_pcm_lib_write(snd->substream, (void __user *)buf, frames);
+ if (result != frames) {
+ ERROR(card, "Playback error: %d\n", (int)result);
+ set_fs(old_fs);
+ goto try_again;
+ }
+ set_fs(old_fs);
+
+ return 0;
+}
+
+static int u_audio_get_playback_channels(struct gaudio *card)
+{
+ return card->playback.channels;
+}
+
+static int u_audio_get_playback_rate(struct gaudio *card)
+{
+ return card->playback.rate;
+}
+
+/**
+ * Open ALSA PCM and control device files
+ * Initial the PCM or control device
+ */
+static int gaudio_open_snd_dev(struct gaudio *card)
+{
+ struct snd_pcm_file *pcm_file;
+ struct gaudio_snd_dev *snd;
+
+ if (!card)
+ return -ENODEV;
+
+ /* Open control device */
+ snd = &card->control;
+ snd->filp = filp_open(fn_cntl, O_RDWR, 0);
+ if (IS_ERR(snd->filp)) {
+ int ret = PTR_ERR(snd->filp);
+ ERROR(card, "unable to open sound control device file: %s\n",
+ fn_cntl);
+ snd->filp = NULL;
+ return ret;
+ }
+ snd->card = card;
+
+ /* Open PCM playback device and setup substream */
+ snd = &card->playback;
+ snd->filp = filp_open(fn_play, O_WRONLY, 0);
+ if (IS_ERR(snd->filp)) {
+ int ret = PTR_ERR(snd->filp);
+
+ ERROR(card, "No such PCM playback device: %s\n", fn_play);
+ snd->filp = NULL;
+ return ret;
+ }
+ pcm_file = snd->filp->private_data;
+ snd->substream = pcm_file->substream;
+ snd->card = card;
+ playback_default_hw_params(snd);
+
+ /* Open PCM capture device and setup substream */
+ snd = &card->capture;
+ snd->filp = filp_open(fn_cap, O_RDONLY, 0);
+ if (IS_ERR(snd->filp)) {
+ ERROR(card, "No such PCM capture device: %s\n", fn_cap);
+ snd->substream = NULL;
+ snd->card = NULL;
+ snd->filp = NULL;
+ } else {
+ pcm_file = snd->filp->private_data;
+ snd->substream = pcm_file->substream;
+ snd->card = card;
+ }
+
+ return 0;
+}
+
+/**
+ * Close ALSA PCM and control device files
+ */
+static int gaudio_close_snd_dev(struct gaudio *gau)
+{
+ struct gaudio_snd_dev *snd;
+
+ /* Close control device */
+ snd = &gau->control;
+ if (snd->filp)
+ filp_close(snd->filp, NULL);
+
+ /* Close PCM playback device and setup substream */
+ snd = &gau->playback;
+ if (snd->filp)
+ filp_close(snd->filp, NULL);
+
+ /* Close PCM capture device and setup substream */
+ snd = &gau->capture;
+ if (snd->filp)
+ filp_close(snd->filp, NULL);
+
+ return 0;
+}
+
+static struct gaudio *the_card;
+/**
+ * gaudio_setup - setup ALSA interface and preparing for USB transfer
+ *
+ * This sets up PCM, mixer or MIDI ALSA devices fore USB gadget using.
+ *
+ * Returns negative errno, or zero on success
+ */
+int __init gaudio_setup(struct gaudio *card)
+{
+ int ret;
+
+ ret = gaudio_open_snd_dev(card);
+ if (ret)
+ ERROR(card, "we need at least one control device\n");
+ else if (!the_card)
+ the_card = card;
+
+ return ret;
+
+}
+
+/**
+ * gaudio_cleanup - remove ALSA device interface
+ *
+ * This is called to free all resources allocated by @gaudio_setup().
+ */
+void gaudio_cleanup(void)
+{
+ if (the_card) {
+ gaudio_close_snd_dev(the_card);
+ the_card = NULL;
+ }
+}
+
--- /dev/null
+/*
+ * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities
+ *
+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
+ * Copyright (C) 2008 Analog Devices, Inc
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __U_AUDIO_H
+#define __U_AUDIO_H
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/composite.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "gadget_chips.h"
+
+/*
+ * This represents the USB side of an audio card device, managed by a USB
+ * function which provides control and stream interfaces.
+ */
+
+struct gaudio_snd_dev {
+ struct gaudio *card;
+ struct file *filp;
+ struct snd_pcm_substream *substream;
+ int access;
+ int format;
+ int channels;
+ int rate;
+};
+
+struct gaudio {
+ struct usb_function func;
+ struct usb_gadget *gadget;
+
+ /* ALSA sound device interfaces */
+ struct gaudio_snd_dev control;
+ struct gaudio_snd_dev playback;
+ struct gaudio_snd_dev capture;
+
+ /* TODO */
+};
+
+int gaudio_setup(struct gaudio *card);
+void gaudio_cleanup(void);
+
+#endif /* __U_AUDIO_H */
--- /dev/null
+/*
+ * uvc_gadget.h -- USB Video Class Gadget driver
+ *
+ * Copyright (C) 2009-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _UVC_GADGET_H_
+#define _UVC_GADGET_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+#include <linux/usb/ch9.h>
+
+#define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0)
+#define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0)
+#define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1)
+#define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2)
+#define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3)
+#define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4)
+#define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5)
+#define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5)
+
+struct uvc_request_data
+{
+ __s32 length;
+ __u8 data[60];
+};
+
+struct uvc_event
+{
+ union {
+ enum usb_device_speed speed;
+ struct usb_ctrlrequest req;
+ struct uvc_request_data data;
+ };
+};
+
+#define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data)
+
+#define UVC_INTF_CONTROL 0
+#define UVC_INTF_STREAMING 1
+
+/* ------------------------------------------------------------------------
+ * Debugging, printing and logging
+ */
+
+#ifdef __KERNEL__
+
+#include <linux/usb.h> /* For usb_endpoint_* */
+#include <linux/usb/gadget.h>
+#include <linux/videodev2.h>
+#include <linux/version.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-device.h>
+
+#include "uvc_queue.h"
+
+#define UVC_TRACE_PROBE (1 << 0)
+#define UVC_TRACE_DESCR (1 << 1)
+#define UVC_TRACE_CONTROL (1 << 2)
+#define UVC_TRACE_FORMAT (1 << 3)
+#define UVC_TRACE_CAPTURE (1 << 4)
+#define UVC_TRACE_CALLS (1 << 5)
+#define UVC_TRACE_IOCTL (1 << 6)
+#define UVC_TRACE_FRAME (1 << 7)
+#define UVC_TRACE_SUSPEND (1 << 8)
+#define UVC_TRACE_STATUS (1 << 9)
+
+#define UVC_WARN_MINMAX 0
+#define UVC_WARN_PROBE_DEF 1
+
+extern unsigned int uvc_gadget_trace_param;
+
+#define uvc_trace(flag, msg...) \
+ do { \
+ if (uvc_gadget_trace_param & flag) \
+ printk(KERN_DEBUG "uvcvideo: " msg); \
+ } while (0)
+
+#define uvc_warn_once(dev, warn, msg...) \
+ do { \
+ if (!test_and_set_bit(warn, &dev->warnings)) \
+ printk(KERN_INFO "uvcvideo: " msg); \
+ } while (0)
+
+#define uvc_printk(level, msg...) \
+ printk(level "uvcvideo: " msg)
+
+/* ------------------------------------------------------------------------
+ * Driver specific constants
+ */
+
+#define DRIVER_VERSION "0.1.0"
+#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0)
+
+#define UVC_NUM_REQUESTS 4
+#define UVC_MAX_REQUEST_SIZE 64
+#define UVC_MAX_EVENTS 4
+
+/* ------------------------------------------------------------------------
+ * Structures
+ */
+
+struct uvc_video
+{
+ struct usb_ep *ep;
+
+ /* Frame parameters */
+ u8 bpp;
+ u32 fcc;
+ unsigned int width;
+ unsigned int height;
+ unsigned int imagesize;
+
+ /* Requests */
+ unsigned int req_size;
+ struct usb_request *req[UVC_NUM_REQUESTS];
+ __u8 *req_buffer[UVC_NUM_REQUESTS];
+ struct list_head req_free;
+ spinlock_t req_lock;
+
+ void (*encode) (struct usb_request *req, struct uvc_video *video,
+ struct uvc_buffer *buf);
+
+ /* Context data used by the completion handler */
+ __u32 payload_size;
+ __u32 max_payload_size;
+
+ struct uvc_video_queue queue;
+ unsigned int fid;
+};
+
+enum uvc_state
+{
+ UVC_STATE_DISCONNECTED,
+ UVC_STATE_CONNECTED,
+ UVC_STATE_STREAMING,
+};
+
+struct uvc_device
+{
+ struct video_device *vdev;
+ struct v4l2_device v4l2_dev;
+ enum uvc_state state;
+ struct usb_function func;
+ struct uvc_video video;
+
+ /* Descriptors */
+ struct {
+ const struct uvc_descriptor_header * const *fs_control;
+ const struct uvc_descriptor_header * const *ss_control;
+ const struct uvc_descriptor_header * const *fs_streaming;
+ const struct uvc_descriptor_header * const *hs_streaming;
+ const struct uvc_descriptor_header * const *ss_streaming;
+ } desc;
+
+ unsigned int control_intf;
+ struct usb_ep *control_ep;
+ struct usb_request *control_req;
+ void *control_buf;
+
+ unsigned int streaming_intf;
+
+ /* Events */
+ unsigned int event_length;
+ unsigned int event_setup_out : 1;
+};
+
+static inline struct uvc_device *to_uvc(struct usb_function *f)
+{
+ return container_of(f, struct uvc_device, func);
+}
+
+struct uvc_file_handle
+{
+ struct v4l2_fh vfh;
+ struct uvc_video *device;
+};
+
+#define to_uvc_file_handle(handle) \
+ container_of(handle, struct uvc_file_handle, vfh)
+
+/* ------------------------------------------------------------------------
+ * Functions
+ */
+
+extern void uvc_function_setup_continue(struct uvc_device *uvc);
+extern void uvc_endpoint_stream(struct uvc_device *dev);
+
+extern void uvc_function_connect(struct uvc_device *uvc);
+extern void uvc_function_disconnect(struct uvc_device *uvc);
+
+#endif /* __KERNEL__ */
+
+#endif /* _UVC_GADGET_H_ */
+
--- /dev/null
+/*
+ * uvc_queue.c -- USB Video Class driver - Buffers management
+ *
+ * Copyright (C) 2005-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/atomic.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#include <linux/vmalloc.h>
+#include <linux/wait.h>
+
+#include <media/v4l2-common.h>
+#include <media/videobuf2-vmalloc.h>
+
+#include "uvc.h"
+
+/* ------------------------------------------------------------------------
+ * Video buffers queue management.
+ *
+ * Video queues is initialized by uvc_queue_init(). The function performs
+ * basic initialization of the uvc_video_queue struct and never fails.
+ *
+ * Video buffers are managed by videobuf2. The driver uses a mutex to protect
+ * the videobuf2 queue operations by serializing calls to videobuf2 and a
+ * spinlock to protect the IRQ queue that holds the buffers to be processed by
+ * the driver.
+ */
+
+/* -----------------------------------------------------------------------------
+ * videobuf2 queue operations
+ */
+
+static int uvc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
+ struct uvc_video *video = container_of(queue, struct uvc_video, queue);
+
+ if (*nbuffers > UVC_MAX_VIDEO_BUFFERS)
+ *nbuffers = UVC_MAX_VIDEO_BUFFERS;
+
+ *nplanes = 1;
+
+ sizes[0] = video->imagesize;
+
+ return 0;
+}
+
+static int uvc_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
+ struct uvc_buffer *buf = container_of(vb, struct uvc_buffer, buf);
+
+ if (vb->v4l2_buf.type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
+ vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
+ uvc_trace(UVC_TRACE_CAPTURE, "[E] Bytes used out of bounds.\n");
+ return -EINVAL;
+ }
+
+ if (unlikely(queue->flags & UVC_QUEUE_DISCONNECTED))
+ return -ENODEV;
+
+ buf->state = UVC_BUF_STATE_QUEUED;
+ buf->mem = vb2_plane_vaddr(vb, 0);
+ buf->length = vb2_plane_size(vb, 0);
+ if (vb->v4l2_buf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ buf->bytesused = 0;
+ else
+ buf->bytesused = vb2_get_plane_payload(vb, 0);
+
+ return 0;
+}
+
+static void uvc_buffer_queue(struct vb2_buffer *vb)
+{
+ struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
+ struct uvc_buffer *buf = container_of(vb, struct uvc_buffer, buf);
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+
+ if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
+ list_add_tail(&buf->queue, &queue->irqqueue);
+ } else {
+ /* If the device is disconnected return the buffer to userspace
+ * directly. The next QBUF call will fail with -ENODEV.
+ */
+ buf->state = UVC_BUF_STATE_ERROR;
+ vb2_buffer_done(&buf->buf, VB2_BUF_STATE_ERROR);
+ }
+
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+}
+
+static void uvc_wait_prepare(struct vb2_queue *vq)
+{
+ struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
+
+ mutex_unlock(&queue->mutex);
+}
+
+static void uvc_wait_finish(struct vb2_queue *vq)
+{
+ struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
+
+ mutex_lock(&queue->mutex);
+}
+
+static struct vb2_ops uvc_queue_qops = {
+ .queue_setup = uvc_queue_setup,
+ .buf_prepare = uvc_buffer_prepare,
+ .buf_queue = uvc_buffer_queue,
+ .wait_prepare = uvc_wait_prepare,
+ .wait_finish = uvc_wait_finish,
+};
+
+static int uvc_queue_init(struct uvc_video_queue *queue,
+ enum v4l2_buf_type type)
+{
+ int ret;
+
+ queue->queue.type = type;
+ queue->queue.io_modes = VB2_MMAP | VB2_USERPTR;
+ queue->queue.drv_priv = queue;
+ queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
+ queue->queue.ops = &uvc_queue_qops;
+ queue->queue.mem_ops = &vb2_vmalloc_memops;
+ queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
+ | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
+ ret = vb2_queue_init(&queue->queue);
+ if (ret)
+ return ret;
+
+ mutex_init(&queue->mutex);
+ spin_lock_init(&queue->irqlock);
+ INIT_LIST_HEAD(&queue->irqqueue);
+ queue->flags = 0;
+
+ return 0;
+}
+
+/*
+ * Free the video buffers.
+ */
+static void uvc_free_buffers(struct uvc_video_queue *queue)
+{
+ mutex_lock(&queue->mutex);
+ vb2_queue_release(&queue->queue);
+ mutex_unlock(&queue->mutex);
+}
+
+/*
+ * Allocate the video buffers.
+ */
+static int uvc_alloc_buffers(struct uvc_video_queue *queue,
+ struct v4l2_requestbuffers *rb)
+{
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_reqbufs(&queue->queue, rb);
+ mutex_unlock(&queue->mutex);
+
+ return ret ? ret : rb->count;
+}
+
+static int uvc_query_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *buf)
+{
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_querybuf(&queue->queue, buf);
+ mutex_unlock(&queue->mutex);
+
+ return ret;
+}
+
+static int uvc_queue_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *buf)
+{
+ unsigned long flags;
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_qbuf(&queue->queue, buf);
+ if (ret < 0)
+ goto done;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ ret = (queue->flags & UVC_QUEUE_PAUSED) != 0;
+ queue->flags &= ~UVC_QUEUE_PAUSED;
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+
+done:
+ mutex_unlock(&queue->mutex);
+ return ret;
+}
+
+/*
+ * Dequeue a video buffer. If nonblocking is false, block until a buffer is
+ * available.
+ */
+static int uvc_dequeue_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *buf, int nonblocking)
+{
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
+ mutex_unlock(&queue->mutex);
+
+ return ret;
+}
+
+/*
+ * Poll the video queue.
+ *
+ * This function implements video queue polling and is intended to be used by
+ * the device poll handler.
+ */
+static unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
+ struct file *file, poll_table *wait)
+{
+ unsigned int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_poll(&queue->queue, file, wait);
+ mutex_unlock(&queue->mutex);
+
+ return ret;
+}
+
+static int uvc_queue_mmap(struct uvc_video_queue *queue,
+ struct vm_area_struct *vma)
+{
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_mmap(&queue->queue, vma);
+ mutex_unlock(&queue->mutex);
+
+ return ret;
+}
+
+#ifndef CONFIG_MMU
+/*
+ * Get unmapped area.
+ *
+ * NO-MMU arch need this function to make mmap() work correctly.
+ */
+static unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
+ unsigned long pgoff)
+{
+ unsigned long ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
+ mutex_unlock(&queue->mutex);
+ return ret;
+}
+#endif
+
+/*
+ * Cancel the video buffers queue.
+ *
+ * Cancelling the queue marks all buffers on the irq queue as erroneous,
+ * wakes them up and removes them from the queue.
+ *
+ * If the disconnect parameter is set, further calls to uvc_queue_buffer will
+ * fail with -ENODEV.
+ *
+ * This function acquires the irq spinlock and can be called from interrupt
+ * context.
+ */
+static void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
+{
+ struct uvc_buffer *buf;
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ while (!list_empty(&queue->irqqueue)) {
+ buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
+ queue);
+ list_del(&buf->queue);
+ buf->state = UVC_BUF_STATE_ERROR;
+ vb2_buffer_done(&buf->buf, VB2_BUF_STATE_ERROR);
+ }
+ /* This must be protected by the irqlock spinlock to avoid race
+ * conditions between uvc_queue_buffer and the disconnection event that
+ * could result in an interruptible wait in uvc_dequeue_buffer. Do not
+ * blindly replace this logic by checking for the UVC_DEV_DISCONNECTED
+ * state outside the queue code.
+ */
+ if (disconnect)
+ queue->flags |= UVC_QUEUE_DISCONNECTED;
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+}
+
+/*
+ * Enable or disable the video buffers queue.
+ *
+ * The queue must be enabled before starting video acquisition and must be
+ * disabled after stopping it. This ensures that the video buffers queue
+ * state can be properly initialized before buffers are accessed from the
+ * interrupt handler.
+ *
+ * Enabling the video queue initializes parameters (such as sequence number,
+ * sync pattern, ...). If the queue is already enabled, return -EBUSY.
+ *
+ * Disabling the video queue cancels the queue and removes all buffers from
+ * the main queue.
+ *
+ * This function can't be called from interrupt context. Use
+ * uvc_queue_cancel() instead.
+ */
+static int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ mutex_lock(&queue->mutex);
+ if (enable) {
+ ret = vb2_streamon(&queue->queue, queue->queue.type);
+ if (ret < 0)
+ goto done;
+
+ queue->sequence = 0;
+ queue->buf_used = 0;
+ } else {
+ ret = vb2_streamoff(&queue->queue, queue->queue.type);
+ if (ret < 0)
+ goto done;
+
+ spin_lock_irqsave(&queue->irqlock, flags);
+ INIT_LIST_HEAD(&queue->irqqueue);
+
+ /*
+ * FIXME: We need to clear the DISCONNECTED flag to ensure that
+ * applications will be able to queue buffers for the next
+ * streaming run. However, clearing it here doesn't guarantee
+ * that the device will be reconnected in the meantime.
+ */
+ queue->flags &= ~UVC_QUEUE_DISCONNECTED;
+ spin_unlock_irqrestore(&queue->irqlock, flags);
+ }
+
+done:
+ mutex_unlock(&queue->mutex);
+ return ret;
+}
+
+/* called with &queue_irqlock held.. */
+static struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
+ struct uvc_buffer *buf)
+{
+ struct uvc_buffer *nextbuf;
+
+ if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) &&
+ buf->length != buf->bytesused) {
+ buf->state = UVC_BUF_STATE_QUEUED;
+ vb2_set_plane_payload(&buf->buf, 0, 0);
+ return buf;
+ }
+
+ list_del(&buf->queue);
+ if (!list_empty(&queue->irqqueue))
+ nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
+ queue);
+ else
+ nextbuf = NULL;
+
+ buf->buf.v4l2_buf.field = V4L2_FIELD_NONE;
+ buf->buf.v4l2_buf.sequence = queue->sequence++;
+ v4l2_get_timestamp(&buf->buf.v4l2_buf.timestamp);
+
+ vb2_set_plane_payload(&buf->buf, 0, buf->bytesused);
+ vb2_buffer_done(&buf->buf, VB2_BUF_STATE_DONE);
+
+ return nextbuf;
+}
+
+static struct uvc_buffer *uvc_queue_head(struct uvc_video_queue *queue)
+{
+ struct uvc_buffer *buf = NULL;
+
+ if (!list_empty(&queue->irqqueue))
+ buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
+ queue);
+ else
+ queue->flags |= UVC_QUEUE_PAUSED;
+
+ return buf;
+}
+
--- /dev/null
+#ifndef _UVC_QUEUE_H_
+#define _UVC_QUEUE_H_
+
+#ifdef __KERNEL__
+
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/videodev2.h>
+#include <media/videobuf2-core.h>
+
+/* Maximum frame size in bytes, for sanity checking. */
+#define UVC_MAX_FRAME_SIZE (16*1024*1024)
+/* Maximum number of video buffers. */
+#define UVC_MAX_VIDEO_BUFFERS 32
+
+/* ------------------------------------------------------------------------
+ * Structures.
+ */
+
+enum uvc_buffer_state {
+ UVC_BUF_STATE_IDLE = 0,
+ UVC_BUF_STATE_QUEUED = 1,
+ UVC_BUF_STATE_ACTIVE = 2,
+ UVC_BUF_STATE_DONE = 3,
+ UVC_BUF_STATE_ERROR = 4,
+};
+
+struct uvc_buffer {
+ struct vb2_buffer buf;
+ struct list_head queue;
+
+ enum uvc_buffer_state state;
+ void *mem;
+ unsigned int length;
+ unsigned int bytesused;
+};
+
+#define UVC_QUEUE_DISCONNECTED (1 << 0)
+#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1)
+#define UVC_QUEUE_PAUSED (1 << 2)
+
+struct uvc_video_queue {
+ struct vb2_queue queue;
+ struct mutex mutex; /* Protects queue */
+
+ unsigned int flags;
+ __u32 sequence;
+
+ unsigned int buf_used;
+
+ spinlock_t irqlock; /* Protects flags and irqqueue */
+ struct list_head irqqueue;
+};
+
+static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
+{
+ return vb2_is_streaming(&queue->queue);
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* _UVC_QUEUE_H_ */
+
--- /dev/null
+/*
+ * uvc_v4l2.c -- USB Video Class Gadget driver
+ *
+ * Copyright (C) 2009-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/videodev2.h>
+#include <linux/vmalloc.h>
+#include <linux/wait.h>
+
+#include <media/v4l2-dev.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+
+#include "uvc.h"
+#include "uvc_queue.h"
+
+/* --------------------------------------------------------------------------
+ * Requests handling
+ */
+
+static int
+uvc_send_response(struct uvc_device *uvc, struct uvc_request_data *data)
+{
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+ struct usb_request *req = uvc->control_req;
+
+ if (data->length < 0)
+ return usb_ep_set_halt(cdev->gadget->ep0);
+
+ req->length = min_t(unsigned int, uvc->event_length, data->length);
+ req->zero = data->length < uvc->event_length;
+
+ memcpy(req->buf, data->data, req->length);
+
+ return usb_ep_queue(cdev->gadget->ep0, req, GFP_KERNEL);
+}
+
+/* --------------------------------------------------------------------------
+ * V4L2
+ */
+
+struct uvc_format
+{
+ u8 bpp;
+ u32 fcc;
+};
+
+static struct uvc_format uvc_formats[] = {
+ { 16, V4L2_PIX_FMT_YUYV },
+ { 0, V4L2_PIX_FMT_MJPEG },
+};
+
+static int
+uvc_v4l2_get_format(struct uvc_video *video, struct v4l2_format *fmt)
+{
+ fmt->fmt.pix.pixelformat = video->fcc;
+ fmt->fmt.pix.width = video->width;
+ fmt->fmt.pix.height = video->height;
+ fmt->fmt.pix.field = V4L2_FIELD_NONE;
+ fmt->fmt.pix.bytesperline = video->bpp * video->width / 8;
+ fmt->fmt.pix.sizeimage = video->imagesize;
+ fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->fmt.pix.priv = 0;
+
+ return 0;
+}
+
+static int
+uvc_v4l2_set_format(struct uvc_video *video, struct v4l2_format *fmt)
+{
+ struct uvc_format *format;
+ unsigned int imagesize;
+ unsigned int bpl;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(uvc_formats); ++i) {
+ format = &uvc_formats[i];
+ if (format->fcc == fmt->fmt.pix.pixelformat)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(uvc_formats)) {
+ printk(KERN_INFO "Unsupported format 0x%08x.\n",
+ fmt->fmt.pix.pixelformat);
+ return -EINVAL;
+ }
+
+ bpl = format->bpp * fmt->fmt.pix.width / 8;
+ imagesize = bpl ? bpl * fmt->fmt.pix.height : fmt->fmt.pix.sizeimage;
+
+ video->fcc = format->fcc;
+ video->bpp = format->bpp;
+ video->width = fmt->fmt.pix.width;
+ video->height = fmt->fmt.pix.height;
+ video->imagesize = imagesize;
+
+ fmt->fmt.pix.field = V4L2_FIELD_NONE;
+ fmt->fmt.pix.bytesperline = bpl;
+ fmt->fmt.pix.sizeimage = imagesize;
+ fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->fmt.pix.priv = 0;
+
+ return 0;
+}
+
+static int
+uvc_v4l2_open(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvc_file_handle *handle;
+
+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+ if (handle == NULL)
+ return -ENOMEM;
+
+ v4l2_fh_init(&handle->vfh, vdev);
+ v4l2_fh_add(&handle->vfh);
+
+ handle->device = &uvc->video;
+ file->private_data = &handle->vfh;
+
+ uvc_function_connect(uvc);
+ return 0;
+}
+
+static int
+uvc_v4l2_release(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvc_file_handle *handle = to_uvc_file_handle(file->private_data);
+ struct uvc_video *video = handle->device;
+
+ uvc_function_disconnect(uvc);
+
+ uvc_video_enable(video, 0);
+ uvc_free_buffers(&video->queue);
+
+ file->private_data = NULL;
+ v4l2_fh_del(&handle->vfh);
+ v4l2_fh_exit(&handle->vfh);
+ kfree(handle);
+
+ return 0;
+}
+
+static long
+uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvc_file_handle *handle = to_uvc_file_handle(file->private_data);
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+ struct uvc_video *video = &uvc->video;
+ int ret = 0;
+
+ switch (cmd) {
+ /* Query capabilities */
+ case VIDIOC_QUERYCAP:
+ {
+ struct v4l2_capability *cap = arg;
+
+ memset(cap, 0, sizeof *cap);
+ strlcpy(cap->driver, "g_uvc", sizeof(cap->driver));
+ strlcpy(cap->card, cdev->gadget->name, sizeof(cap->card));
+ strlcpy(cap->bus_info, dev_name(&cdev->gadget->dev),
+ sizeof cap->bus_info);
+ cap->version = DRIVER_VERSION_NUMBER;
+ cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+ break;
+ }
+
+ /* Get & Set format */
+ case VIDIOC_G_FMT:
+ {
+ struct v4l2_format *fmt = arg;
+
+ if (fmt->type != video->queue.queue.type)
+ return -EINVAL;
+
+ return uvc_v4l2_get_format(video, fmt);
+ }
+
+ case VIDIOC_S_FMT:
+ {
+ struct v4l2_format *fmt = arg;
+
+ if (fmt->type != video->queue.queue.type)
+ return -EINVAL;
+
+ return uvc_v4l2_set_format(video, fmt);
+ }
+
+ /* Buffers & streaming */
+ case VIDIOC_REQBUFS:
+ {
+ struct v4l2_requestbuffers *rb = arg;
+
+ if (rb->type != video->queue.queue.type)
+ return -EINVAL;
+
+ ret = uvc_alloc_buffers(&video->queue, rb);
+ if (ret < 0)
+ return ret;
+
+ ret = 0;
+ break;
+ }
+
+ case VIDIOC_QUERYBUF:
+ {
+ struct v4l2_buffer *buf = arg;
+
+ return uvc_query_buffer(&video->queue, buf);
+ }
+
+ case VIDIOC_QBUF:
+ if ((ret = uvc_queue_buffer(&video->queue, arg)) < 0)
+ return ret;
+
+ return uvc_video_pump(video);
+
+ case VIDIOC_DQBUF:
+ return uvc_dequeue_buffer(&video->queue, arg,
+ file->f_flags & O_NONBLOCK);
+
+ case VIDIOC_STREAMON:
+ {
+ int *type = arg;
+
+ if (*type != video->queue.queue.type)
+ return -EINVAL;
+
+ /* Enable UVC video. */
+ ret = uvc_video_enable(video, 1);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Complete the alternate setting selection setup phase now that
+ * userspace is ready to provide video frames.
+ */
+ uvc_function_setup_continue(uvc);
+ uvc->state = UVC_STATE_STREAMING;
+
+ return 0;
+ }
+
+ case VIDIOC_STREAMOFF:
+ {
+ int *type = arg;
+
+ if (*type != video->queue.queue.type)
+ return -EINVAL;
+
+ return uvc_video_enable(video, 0);
+ }
+
+ /* Events */
+ case VIDIOC_DQEVENT:
+ {
+ struct v4l2_event *event = arg;
+
+ ret = v4l2_event_dequeue(&handle->vfh, event,
+ file->f_flags & O_NONBLOCK);
+ if (ret == 0 && event->type == UVC_EVENT_SETUP) {
+ struct uvc_event *uvc_event = (void *)&event->u.data;
+
+ /* Tell the complete callback to generate an event for
+ * the next request that will be enqueued by
+ * uvc_event_write.
+ */
+ uvc->event_setup_out =
+ !(uvc_event->req.bRequestType & USB_DIR_IN);
+ uvc->event_length = uvc_event->req.wLength;
+ }
+
+ return ret;
+ }
+
+ case VIDIOC_SUBSCRIBE_EVENT:
+ {
+ struct v4l2_event_subscription *sub = arg;
+
+ if (sub->type < UVC_EVENT_FIRST || sub->type > UVC_EVENT_LAST)
+ return -EINVAL;
+
+ return v4l2_event_subscribe(&handle->vfh, arg, 2, NULL);
+ }
+
+ case VIDIOC_UNSUBSCRIBE_EVENT:
+ return v4l2_event_unsubscribe(&handle->vfh, arg);
+
+ case UVCIOC_SEND_RESPONSE:
+ ret = uvc_send_response(uvc, arg);
+ break;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return ret;
+}
+
+static long
+uvc_v4l2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);
+}
+
+static int
+uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+
+ return uvc_queue_mmap(&uvc->video.queue, vma);
+}
+
+static unsigned int
+uvc_v4l2_poll(struct file *file, poll_table *wait)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+
+ return uvc_queue_poll(&uvc->video.queue, file, wait);
+}
+
+#ifndef CONFIG_MMU
+static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
+ unsigned long addr, unsigned long len, unsigned long pgoff,
+ unsigned long flags)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+
+ return uvc_queue_get_unmapped_area(&uvc->video.queue, pgoff);
+}
+#endif
+
+static struct v4l2_file_operations uvc_v4l2_fops = {
+ .owner = THIS_MODULE,
+ .open = uvc_v4l2_open,
+ .release = uvc_v4l2_release,
+ .ioctl = uvc_v4l2_ioctl,
+ .mmap = uvc_v4l2_mmap,
+ .poll = uvc_v4l2_poll,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = uvc_v4l2_get_unmapped_area,
+#endif
+};
+
--- /dev/null
+/*
+ * uvc_video.c -- USB Video Class Gadget driver
+ *
+ * Copyright (C) 2009-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include <media/v4l2-dev.h>
+
+#include "uvc.h"
+#include "uvc_queue.h"
+
+/* --------------------------------------------------------------------------
+ * Video codecs
+ */
+
+static int
+uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf,
+ u8 *data, int len)
+{
+ data[0] = 2;
+ data[1] = UVC_STREAM_EOH | video->fid;
+
+ if (buf->bytesused - video->queue.buf_used <= len - 2)
+ data[1] |= UVC_STREAM_EOF;
+
+ return 2;
+}
+
+static int
+uvc_video_encode_data(struct uvc_video *video, struct uvc_buffer *buf,
+ u8 *data, int len)
+{
+ struct uvc_video_queue *queue = &video->queue;
+ unsigned int nbytes;
+ void *mem;
+
+ /* Copy video data to the USB buffer. */
+ mem = buf->mem + queue->buf_used;
+ nbytes = min((unsigned int)len, buf->bytesused - queue->buf_used);
+
+ memcpy(data, mem, nbytes);
+ queue->buf_used += nbytes;
+
+ return nbytes;
+}
+
+static void
+uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video,
+ struct uvc_buffer *buf)
+{
+ void *mem = req->buf;
+ int len = video->req_size;
+ int ret;
+
+ /* Add a header at the beginning of the payload. */
+ if (video->payload_size == 0) {
+ ret = uvc_video_encode_header(video, buf, mem, len);
+ video->payload_size += ret;
+ mem += ret;
+ len -= ret;
+ }
+
+ /* Process video data. */
+ len = min((int)(video->max_payload_size - video->payload_size), len);
+ ret = uvc_video_encode_data(video, buf, mem, len);
+
+ video->payload_size += ret;
+ len -= ret;
+
+ req->length = video->req_size - len;
+ req->zero = video->payload_size == video->max_payload_size;
+
+ if (buf->bytesused == video->queue.buf_used) {
+ video->queue.buf_used = 0;
+ buf->state = UVC_BUF_STATE_DONE;
+ uvc_queue_next_buffer(&video->queue, buf);
+ video->fid ^= UVC_STREAM_FID;
+
+ video->payload_size = 0;
+ }
+
+ if (video->payload_size == video->max_payload_size ||
+ buf->bytesused == video->queue.buf_used)
+ video->payload_size = 0;
+}
+
+static void
+uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video,
+ struct uvc_buffer *buf)
+{
+ void *mem = req->buf;
+ int len = video->req_size;
+ int ret;
+
+ /* Add the header. */
+ ret = uvc_video_encode_header(video, buf, mem, len);
+ mem += ret;
+ len -= ret;
+
+ /* Process video data. */
+ ret = uvc_video_encode_data(video, buf, mem, len);
+ len -= ret;
+
+ req->length = video->req_size - len;
+
+ if (buf->bytesused == video->queue.buf_used) {
+ video->queue.buf_used = 0;
+ buf->state = UVC_BUF_STATE_DONE;
+ uvc_queue_next_buffer(&video->queue, buf);
+ video->fid ^= UVC_STREAM_FID;
+ }
+}
+
+/* --------------------------------------------------------------------------
+ * Request handling
+ */
+
+/*
+ * I somehow feel that synchronisation won't be easy to achieve here. We have
+ * three events that control USB requests submission:
+ *
+ * - USB request completion: the completion handler will resubmit the request
+ * if a video buffer is available.
+ *
+ * - USB interface setting selection: in response to a SET_INTERFACE request,
+ * the handler will start streaming if a video buffer is available and if
+ * video is not currently streaming.
+ *
+ * - V4L2 buffer queueing: the driver will start streaming if video is not
+ * currently streaming.
+ *
+ * Race conditions between those 3 events might lead to deadlocks or other
+ * nasty side effects.
+ *
+ * The "video currently streaming" condition can't be detected by the irqqueue
+ * being empty, as a request can still be in flight. A separate "queue paused"
+ * flag is thus needed.
+ *
+ * The paused flag will be set when we try to retrieve the irqqueue head if the
+ * queue is empty, and cleared when we queue a buffer.
+ *
+ * The USB request completion handler will get the buffer at the irqqueue head
+ * under protection of the queue spinlock. If the queue is empty, the streaming
+ * paused flag will be set. Right after releasing the spinlock a userspace
+ * application can queue a buffer. The flag will then cleared, and the ioctl
+ * handler will restart the video stream.
+ */
+static void
+uvc_video_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct uvc_video *video = req->context;
+ struct uvc_video_queue *queue = &video->queue;
+ struct uvc_buffer *buf;
+ unsigned long flags;
+ int ret;
+
+ switch (req->status) {
+ case 0:
+ break;
+
+ case -ESHUTDOWN: /* disconnect from host. */
+ printk(KERN_INFO "VS request cancelled.\n");
+ uvc_queue_cancel(queue, 1);
+ goto requeue;
+
+ default:
+ printk(KERN_INFO "VS request completed with status %d.\n",
+ req->status);
+ uvc_queue_cancel(queue, 0);
+ goto requeue;
+ }
+
+ spin_lock_irqsave(&video->queue.irqlock, flags);
+ buf = uvc_queue_head(&video->queue);
+ if (buf == NULL) {
+ spin_unlock_irqrestore(&video->queue.irqlock, flags);
+ goto requeue;
+ }
+
+ video->encode(req, video, buf);
+
+ if ((ret = usb_ep_queue(ep, req, GFP_ATOMIC)) < 0) {
+ printk(KERN_INFO "Failed to queue request (%d).\n", ret);
+ usb_ep_set_halt(ep);
+ spin_unlock_irqrestore(&video->queue.irqlock, flags);
+ goto requeue;
+ }
+ spin_unlock_irqrestore(&video->queue.irqlock, flags);
+
+ return;
+
+requeue:
+ spin_lock_irqsave(&video->req_lock, flags);
+ list_add_tail(&req->list, &video->req_free);
+ spin_unlock_irqrestore(&video->req_lock, flags);
+}
+
+static int
+uvc_video_free_requests(struct uvc_video *video)
+{
+ unsigned int i;
+
+ for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
+ if (video->req[i]) {
+ usb_ep_free_request(video->ep, video->req[i]);
+ video->req[i] = NULL;
+ }
+
+ if (video->req_buffer[i]) {
+ kfree(video->req_buffer[i]);
+ video->req_buffer[i] = NULL;
+ }
+ }
+
+ INIT_LIST_HEAD(&video->req_free);
+ video->req_size = 0;
+ return 0;
+}
+
+static int
+uvc_video_alloc_requests(struct uvc_video *video)
+{
+ unsigned int req_size;
+ unsigned int i;
+ int ret = -ENOMEM;
+
+ BUG_ON(video->req_size);
+
+ req_size = video->ep->maxpacket
+ * max_t(unsigned int, video->ep->maxburst, 1)
+ * (video->ep->mult + 1);
+
+ for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
+ video->req_buffer[i] = kmalloc(req_size, GFP_KERNEL);
+ if (video->req_buffer[i] == NULL)
+ goto error;
+
+ video->req[i] = usb_ep_alloc_request(video->ep, GFP_KERNEL);
+ if (video->req[i] == NULL)
+ goto error;
+
+ video->req[i]->buf = video->req_buffer[i];
+ video->req[i]->length = 0;
+ video->req[i]->complete = uvc_video_complete;
+ video->req[i]->context = video;
+
+ list_add_tail(&video->req[i]->list, &video->req_free);
+ }
+
+ video->req_size = req_size;
+
+ return 0;
+
+error:
+ uvc_video_free_requests(video);
+ return ret;
+}
+
+/* --------------------------------------------------------------------------
+ * Video streaming
+ */
+
+/*
+ * uvc_video_pump - Pump video data into the USB requests
+ *
+ * This function fills the available USB requests (listed in req_free) with
+ * video data from the queued buffers.
+ */
+static int
+uvc_video_pump(struct uvc_video *video)
+{
+ struct usb_request *req;
+ struct uvc_buffer *buf;
+ unsigned long flags;
+ int ret;
+
+ /* FIXME TODO Race between uvc_video_pump and requests completion
+ * handler ???
+ */
+
+ while (1) {
+ /* Retrieve the first available USB request, protected by the
+ * request lock.
+ */
+ spin_lock_irqsave(&video->req_lock, flags);
+ if (list_empty(&video->req_free)) {
+ spin_unlock_irqrestore(&video->req_lock, flags);
+ return 0;
+ }
+ req = list_first_entry(&video->req_free, struct usb_request,
+ list);
+ list_del(&req->list);
+ spin_unlock_irqrestore(&video->req_lock, flags);
+
+ /* Retrieve the first available video buffer and fill the
+ * request, protected by the video queue irqlock.
+ */
+ spin_lock_irqsave(&video->queue.irqlock, flags);
+ buf = uvc_queue_head(&video->queue);
+ if (buf == NULL) {
+ spin_unlock_irqrestore(&video->queue.irqlock, flags);
+ break;
+ }
+
+ video->encode(req, video, buf);
+
+ /* Queue the USB request */
+ ret = usb_ep_queue(video->ep, req, GFP_ATOMIC);
+ if (ret < 0) {
+ printk(KERN_INFO "Failed to queue request (%d)\n", ret);
+ usb_ep_set_halt(video->ep);
+ spin_unlock_irqrestore(&video->queue.irqlock, flags);
+ break;
+ }
+ spin_unlock_irqrestore(&video->queue.irqlock, flags);
+ }
+
+ spin_lock_irqsave(&video->req_lock, flags);
+ list_add_tail(&req->list, &video->req_free);
+ spin_unlock_irqrestore(&video->req_lock, flags);
+ return 0;
+}
+
+/*
+ * Enable or disable the video stream.
+ */
+static int
+uvc_video_enable(struct uvc_video *video, int enable)
+{
+ unsigned int i;
+ int ret;
+
+ if (video->ep == NULL) {
+ printk(KERN_INFO "Video enable failed, device is "
+ "uninitialized.\n");
+ return -ENODEV;
+ }
+
+ if (!enable) {
+ for (i = 0; i < UVC_NUM_REQUESTS; ++i)
+ usb_ep_dequeue(video->ep, video->req[i]);
+
+ uvc_video_free_requests(video);
+ uvc_queue_enable(&video->queue, 0);
+ return 0;
+ }
+
+ if ((ret = uvc_queue_enable(&video->queue, 1)) < 0)
+ return ret;
+
+ if ((ret = uvc_video_alloc_requests(video)) < 0)
+ return ret;
+
+ if (video->max_payload_size) {
+ video->encode = uvc_video_encode_bulk;
+ video->payload_size = 0;
+ } else
+ video->encode = uvc_video_encode_isoc;
+
+ return uvc_video_pump(video);
+}
+
+/*
+ * Initialize the UVC video stream.
+ */
+static int
+uvc_video_init(struct uvc_video *video)
+{
+ INIT_LIST_HEAD(&video->req_free);
+ spin_lock_init(&video->req_lock);
+
+ video->fcc = V4L2_PIX_FMT_YUYV;
+ video->bpp = 16;
+ video->width = 320;
+ video->height = 240;
+ video->imagesize = 320 * 240 * 2;
+
+ /* Initialize the video buffers queue. */
+ uvc_queue_init(&video->queue, V4L2_BUF_TYPE_VIDEO_OUTPUT);
+ return 0;
+}
+
+++ /dev/null
-/*
- * This header declares the utility functions used by "Gadget Zero", plus
- * interfaces to its two single-configuration function drivers.
- */
-
-#ifndef __G_ZERO_H
-#define __G_ZERO_H
-
-#define GZERO_BULK_BUFLEN 4096
-#define GZERO_QLEN 32
-#define GZERO_ISOC_INTERVAL 4
-#define GZERO_ISOC_MAXPACKET 1024
-
-struct usb_zero_options {
- unsigned pattern;
- unsigned isoc_interval;
- unsigned isoc_maxpacket;
- unsigned isoc_mult;
- unsigned isoc_maxburst;
- unsigned bulk_buflen;
- unsigned qlen;
-};
-
-struct f_ss_opts {
- struct usb_function_instance func_inst;
- unsigned pattern;
- unsigned isoc_interval;
- unsigned isoc_maxpacket;
- unsigned isoc_mult;
- unsigned isoc_maxburst;
- unsigned bulk_buflen;
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-struct f_lb_opts {
- struct usb_function_instance func_inst;
- unsigned bulk_buflen;
- unsigned qlen;
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-void lb_modexit(void);
-int lb_modinit(void);
-
-/* common utilities */
-void free_ep_req(struct usb_ep *ep, struct usb_request *req);
-void disable_endpoints(struct usb_composite_dev *cdev,
- struct usb_ep *in, struct usb_ep *out,
- struct usb_ep *iso_in, struct usb_ep *iso_out);
-
-#endif /* __G_ZERO_H */
ccflags-y := -I$(PWD)/drivers/usb/gadget/
ccflags-y += -I$(PWD)/drivers/usb/gadget/udc/
+ccflags-y += -I$(PWD)/drivers/usb/gadget/function/
g_zero-y := zero.o
g_audio-y := audio.o
+++ /dev/null
-/*
- * ndis.h
- *
- * ntddndis.h modified by Benedikt Spranger <b.spranger@pengutronix.de>
- *
- * Thanks to the cygwin development team,
- * espacially to Casper S. Hornstrup <chorns@users.sourceforge.net>
- *
- * THIS SOFTWARE IS NOT COPYRIGHTED
- *
- * This source code is offered for use in the public domain. You may
- * use, modify or distribute it freely.
- */
-
-#ifndef _LINUX_NDIS_H
-#define _LINUX_NDIS_H
-
-enum NDIS_DEVICE_POWER_STATE {
- NdisDeviceStateUnspecified = 0,
- NdisDeviceStateD0,
- NdisDeviceStateD1,
- NdisDeviceStateD2,
- NdisDeviceStateD3,
- NdisDeviceStateMaximum
-};
-
-struct NDIS_PM_WAKE_UP_CAPABILITIES {
- enum NDIS_DEVICE_POWER_STATE MinMagicPacketWakeUp;
- enum NDIS_DEVICE_POWER_STATE MinPatternWakeUp;
- enum NDIS_DEVICE_POWER_STATE MinLinkChangeWakeUp;
-};
-
-struct NDIS_PNP_CAPABILITIES {
- __le32 Flags;
- struct NDIS_PM_WAKE_UP_CAPABILITIES WakeUpCapabilities;
-};
-
-struct NDIS_PM_PACKET_PATTERN {
- __le32 Priority;
- __le32 Reserved;
- __le32 MaskSize;
- __le32 PatternOffset;
- __le32 PatternSize;
- __le32 PatternFlags;
-};
-
-#endif /* _LINUX_NDIS_H */
+++ /dev/null
-/*
- * RNDIS MSG parser
- *
- * Authors: Benedikt Spranger, Pengutronix
- * Robert Schwebel, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2, as published by the Free Software Foundation.
- *
- * This software was originally developed in conformance with
- * Microsoft's Remote NDIS Specification License Agreement.
- *
- * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
- * Fixed message length bug in init_response
- *
- * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
- * Fixed rndis_rm_hdr length bug.
- *
- * Copyright (C) 2004 by David Brownell
- * updates to merge with Linux 2.6, better match RNDIS spec
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/list.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <linux/seq_file.h>
-#include <linux/netdevice.h>
-
-#include <asm/io.h>
-#include <asm/byteorder.h>
-#include <asm/unaligned.h>
-
-#include "u_rndis.h"
-
-#undef VERBOSE_DEBUG
-
-#include "rndis.h"
-
-
-/* The driver for your USB chip needs to support ep0 OUT to work with
- * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
- *
- * Windows hosts need an INF file like Documentation/usb/linux.inf
- * and will be happier if you provide the host_addr module parameter.
- */
-
-#if 0
-static int rndis_debug = 0;
-module_param (rndis_debug, int, 0);
-MODULE_PARM_DESC (rndis_debug, "enable debugging");
-#else
-#define rndis_debug 0
-#endif
-
-#define RNDIS_MAX_CONFIGS 1
-
-
-static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
-
-/* Driver Version */
-static const __le32 rndis_driver_version = cpu_to_le32(1);
-
-/* Function Prototypes */
-static rndis_resp_t *rndis_add_response(int configNr, u32 length);
-
-
-/* supported OIDs */
-static const u32 oid_supported_list[] =
-{
- /* the general stuff */
- RNDIS_OID_GEN_SUPPORTED_LIST,
- RNDIS_OID_GEN_HARDWARE_STATUS,
- RNDIS_OID_GEN_MEDIA_SUPPORTED,
- RNDIS_OID_GEN_MEDIA_IN_USE,
- RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
- RNDIS_OID_GEN_LINK_SPEED,
- RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
- RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
- RNDIS_OID_GEN_VENDOR_ID,
- RNDIS_OID_GEN_VENDOR_DESCRIPTION,
- RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
- RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
- RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
- RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
- RNDIS_OID_GEN_PHYSICAL_MEDIUM,
-
- /* the statistical stuff */
- RNDIS_OID_GEN_XMIT_OK,
- RNDIS_OID_GEN_RCV_OK,
- RNDIS_OID_GEN_XMIT_ERROR,
- RNDIS_OID_GEN_RCV_ERROR,
- RNDIS_OID_GEN_RCV_NO_BUFFER,
-#ifdef RNDIS_OPTIONAL_STATS
- RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
- RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
- RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
- RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
- RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
- RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
- RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
- RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
- RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
- RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
- RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
- RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
- RNDIS_OID_GEN_RCV_CRC_ERROR,
- RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
-#endif /* RNDIS_OPTIONAL_STATS */
-
- /* mandatory 802.3 */
- /* the general stuff */
- RNDIS_OID_802_3_PERMANENT_ADDRESS,
- RNDIS_OID_802_3_CURRENT_ADDRESS,
- RNDIS_OID_802_3_MULTICAST_LIST,
- RNDIS_OID_802_3_MAC_OPTIONS,
- RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
-
- /* the statistical stuff */
- RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
- RNDIS_OID_802_3_XMIT_ONE_COLLISION,
- RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
-#ifdef RNDIS_OPTIONAL_STATS
- RNDIS_OID_802_3_XMIT_DEFERRED,
- RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
- RNDIS_OID_802_3_RCV_OVERRUN,
- RNDIS_OID_802_3_XMIT_UNDERRUN,
- RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
- RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
- RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
-#endif /* RNDIS_OPTIONAL_STATS */
-
-#ifdef RNDIS_PM
- /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
- * don't say what they mean ... and the NDIS specs are often
- * confusing and/or ambiguous in this context. (That is, more
- * so than their specs for the other OIDs.)
- *
- * FIXME someone who knows what these should do, please
- * implement them!
- */
-
- /* power management */
- OID_PNP_CAPABILITIES,
- OID_PNP_QUERY_POWER,
- OID_PNP_SET_POWER,
-
-#ifdef RNDIS_WAKEUP
- /* wake up host */
- OID_PNP_ENABLE_WAKE_UP,
- OID_PNP_ADD_WAKE_UP_PATTERN,
- OID_PNP_REMOVE_WAKE_UP_PATTERN,
-#endif /* RNDIS_WAKEUP */
-#endif /* RNDIS_PM */
-};
-
-
-/* NDIS Functions */
-static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
- unsigned buf_len, rndis_resp_t *r)
-{
- int retval = -ENOTSUPP;
- u32 length = 4; /* usually */
- __le32 *outbuf;
- int i, count;
- rndis_query_cmplt_type *resp;
- struct net_device *net;
- struct rtnl_link_stats64 temp;
- const struct rtnl_link_stats64 *stats;
-
- if (!r) return -ENOMEM;
- resp = (rndis_query_cmplt_type *)r->buf;
-
- if (!resp) return -ENOMEM;
-
- if (buf_len && rndis_debug > 1) {
- pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
- for (i = 0; i < buf_len; i += 16) {
- pr_debug("%03d: %08x %08x %08x %08x\n", i,
- get_unaligned_le32(&buf[i]),
- get_unaligned_le32(&buf[i + 4]),
- get_unaligned_le32(&buf[i + 8]),
- get_unaligned_le32(&buf[i + 12]));
- }
- }
-
- /* response goes here, right after the header */
- outbuf = (__le32 *)&resp[1];
- resp->InformationBufferOffset = cpu_to_le32(16);
-
- net = rndis_per_dev_params[configNr].dev;
- stats = dev_get_stats(net, &temp);
-
- switch (OID) {
-
- /* general oids (table 4-1) */
-
- /* mandatory */
- case RNDIS_OID_GEN_SUPPORTED_LIST:
- pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
- length = sizeof(oid_supported_list);
- count = length / sizeof(u32);
- for (i = 0; i < count; i++)
- outbuf[i] = cpu_to_le32(oid_supported_list[i]);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_HARDWARE_STATUS:
- pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
- /* Bogus question!
- * Hardware must be ready to receive high level protocols.
- * BTW:
- * reddite ergo quae sunt Caesaris Caesari
- * et quae sunt Dei Deo!
- */
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MEDIA_SUPPORTED:
- pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
- *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MEDIA_IN_USE:
- pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
- /* one medium, one transport... (maybe you do it better) */
- *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].dev->mtu);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_LINK_SPEED:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
- if (rndis_per_dev_params[configNr].media_state
- == RNDIS_MEDIA_STATE_DISCONNECTED)
- *outbuf = cpu_to_le32(0);
- else
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].speed);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].dev->mtu);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].dev->mtu);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_VENDOR_ID:
- pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].vendorID);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
- pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
- if (rndis_per_dev_params[configNr].vendorDescr) {
- length = strlen(rndis_per_dev_params[configNr].
- vendorDescr);
- memcpy(outbuf,
- rndis_per_dev_params[configNr].vendorDescr,
- length);
- } else {
- outbuf[0] = 0;
- }
- retval = 0;
- break;
-
- case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
- pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
- /* Created as LE */
- *outbuf = rndis_driver_version;
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
- pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
- *outbuf = cpu_to_le32(*rndis_per_dev_params[configNr].filter);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
- *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
- *outbuf = cpu_to_le32(rndis_per_dev_params[configNr]
- .media_state);
- retval = 0;
- break;
-
- case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
- pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* The RNDIS specification is incomplete/wrong. Some versions
- * of MS-Windows expect OIDs that aren't specified there. Other
- * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
- */
- case RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */
- pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
- *outbuf = cpu_to_le32(
- RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
- | RNDIS_MAC_OPTION_FULL_DUPLEX);
- retval = 0;
- break;
-
- /* statistics OIDs (table 4-2) */
-
- /* mandatory */
- case RNDIS_OID_GEN_XMIT_OK:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->tx_packets
- - stats->tx_errors - stats->tx_dropped);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RCV_OK:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_packets
- - stats->rx_errors - stats->rx_dropped);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_XMIT_ERROR:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->tx_errors);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RCV_ERROR:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_errors);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RCV_NO_BUFFER:
- pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_dropped);
- retval = 0;
- }
- break;
-
- /* ieee802.3 OIDs (table 4-3) */
-
- /* mandatory */
- case RNDIS_OID_802_3_PERMANENT_ADDRESS:
- pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- length = ETH_ALEN;
- memcpy(outbuf,
- rndis_per_dev_params[configNr].host_mac,
- length);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_CURRENT_ADDRESS:
- pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- length = ETH_ALEN;
- memcpy(outbuf,
- rndis_per_dev_params [configNr].host_mac,
- length);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_MULTICAST_LIST:
- pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
- /* Multicast base address only */
- *outbuf = cpu_to_le32(0xE0000000);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
- pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
- /* Multicast base address only */
- *outbuf = cpu_to_le32(1);
- retval = 0;
- break;
-
- case RNDIS_OID_802_3_MAC_OPTIONS:
- pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* ieee802.3 statistics OIDs (table 4-4) */
-
- /* mandatory */
- case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
- pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_frame_errors);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
- pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
- pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- default:
- pr_warning("%s: query unknown OID 0x%08X\n",
- __func__, OID);
- }
- if (retval < 0)
- length = 0;
-
- resp->InformationBufferLength = cpu_to_le32(length);
- r->length = length + sizeof(*resp);
- resp->MessageLength = cpu_to_le32(r->length);
- return retval;
-}
-
-static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
- rndis_resp_t *r)
-{
- rndis_set_cmplt_type *resp;
- int i, retval = -ENOTSUPP;
- struct rndis_params *params;
-
- if (!r)
- return -ENOMEM;
- resp = (rndis_set_cmplt_type *)r->buf;
- if (!resp)
- return -ENOMEM;
-
- if (buf_len && rndis_debug > 1) {
- pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
- for (i = 0; i < buf_len; i += 16) {
- pr_debug("%03d: %08x %08x %08x %08x\n", i,
- get_unaligned_le32(&buf[i]),
- get_unaligned_le32(&buf[i + 4]),
- get_unaligned_le32(&buf[i + 8]),
- get_unaligned_le32(&buf[i + 12]));
- }
- }
-
- params = &rndis_per_dev_params[configNr];
- switch (OID) {
- case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
-
- /* these NDIS_PACKET_TYPE_* bitflags are shared with
- * cdc_filter; it's not RNDIS-specific
- * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
- * PROMISCUOUS, DIRECTED,
- * MULTICAST, ALL_MULTICAST, BROADCAST
- */
- *params->filter = (u16)get_unaligned_le32(buf);
- pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
- __func__, *params->filter);
-
- /* this call has a significant side effect: it's
- * what makes the packet flow start and stop, like
- * activating the CDC Ethernet altsetting.
- */
- retval = 0;
- if (*params->filter) {
- params->state = RNDIS_DATA_INITIALIZED;
- netif_carrier_on(params->dev);
- if (netif_running(params->dev))
- netif_wake_queue(params->dev);
- } else {
- params->state = RNDIS_INITIALIZED;
- netif_carrier_off(params->dev);
- netif_stop_queue(params->dev);
- }
- break;
-
- case RNDIS_OID_802_3_MULTICAST_LIST:
- /* I think we can ignore this */
- pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
- retval = 0;
- break;
-
- default:
- pr_warning("%s: set unknown OID 0x%08X, size %d\n",
- __func__, OID, buf_len);
- }
-
- return retval;
-}
-
-/*
- * Response Functions
- */
-
-static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
-{
- rndis_init_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- if (!params->dev)
- return -ENOTSUPP;
-
- r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_init_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
- resp->MessageLength = cpu_to_le32(52);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
- resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
- resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
- resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
- resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
- resp->MaxPacketsPerTransfer = cpu_to_le32(1);
- resp->MaxTransferSize = cpu_to_le32(
- params->dev->mtu
- + sizeof(struct ethhdr)
- + sizeof(struct rndis_packet_msg_type)
- + 22);
- resp->PacketAlignmentFactor = cpu_to_le32(0);
- resp->AFListOffset = cpu_to_le32(0);
- resp->AFListSize = cpu_to_le32(0);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
-{
- rndis_query_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
- if (!params->dev)
- return -ENOTSUPP;
-
- /*
- * we need more memory:
- * gen_ndis_query_resp expects enough space for
- * rndis_query_cmplt_type followed by data.
- * oid_supported_list is the largest data reply
- */
- r = rndis_add_response(configNr,
- sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_query_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
-
- if (gen_ndis_query_resp(configNr, le32_to_cpu(buf->OID),
- le32_to_cpu(buf->InformationBufferOffset)
- + 8 + (u8 *)buf,
- le32_to_cpu(buf->InformationBufferLength),
- r)) {
- /* OID not supported */
- resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
- resp->MessageLength = cpu_to_le32(sizeof *resp);
- resp->InformationBufferLength = cpu_to_le32(0);
- resp->InformationBufferOffset = cpu_to_le32(0);
- } else
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
-{
- u32 BufLength, BufOffset;
- rndis_set_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_set_cmplt_type *)r->buf;
-
- BufLength = le32_to_cpu(buf->InformationBufferLength);
- BufOffset = le32_to_cpu(buf->InformationBufferOffset);
-
-#ifdef VERBOSE_DEBUG
- pr_debug("%s: Length: %d\n", __func__, BufLength);
- pr_debug("%s: Offset: %d\n", __func__, BufOffset);
- pr_debug("%s: InfoBuffer: ", __func__);
-
- for (i = 0; i < BufLength; i++) {
- pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
- }
-
- pr_debug("\n");
-#endif
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
- resp->MessageLength = cpu_to_le32(16);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
- if (gen_ndis_set_resp(configNr, le32_to_cpu(buf->OID),
- ((u8 *)buf) + 8 + BufOffset, BufLength, r))
- resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
- else
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
-{
- rndis_reset_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_reset_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
- resp->MessageLength = cpu_to_le32(16);
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
- /* resent information */
- resp->AddressingReset = cpu_to_le32(1);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_keepalive_response(int configNr,
- rndis_keepalive_msg_type *buf)
-{
- rndis_keepalive_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- /* host "should" check only in RNDIS_DATA_INITIALIZED state */
-
- r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_keepalive_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
- resp->MessageLength = cpu_to_le32(16);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-
-/*
- * Device to Host Comunication
- */
-static int rndis_indicate_status_msg(int configNr, u32 status)
-{
- rndis_indicate_status_msg_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- if (params->state == RNDIS_UNINITIALIZED)
- return -ENOTSUPP;
-
- r = rndis_add_response(configNr,
- sizeof(rndis_indicate_status_msg_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_indicate_status_msg_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
- resp->MessageLength = cpu_to_le32(20);
- resp->Status = cpu_to_le32(status);
- resp->StatusBufferLength = cpu_to_le32(0);
- resp->StatusBufferOffset = cpu_to_le32(0);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-int rndis_signal_connect(int configNr)
-{
- rndis_per_dev_params[configNr].media_state
- = RNDIS_MEDIA_STATE_CONNECTED;
- return rndis_indicate_status_msg(configNr,
- RNDIS_STATUS_MEDIA_CONNECT);
-}
-EXPORT_SYMBOL_GPL(rndis_signal_connect);
-
-int rndis_signal_disconnect(int configNr)
-{
- rndis_per_dev_params[configNr].media_state
- = RNDIS_MEDIA_STATE_DISCONNECTED;
- return rndis_indicate_status_msg(configNr,
- RNDIS_STATUS_MEDIA_DISCONNECT);
-}
-EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
-
-void rndis_uninit(int configNr)
-{
- u8 *buf;
- u32 length;
-
- if (configNr >= RNDIS_MAX_CONFIGS)
- return;
- rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED;
-
- /* drain the response queue */
- while ((buf = rndis_get_next_response(configNr, &length)))
- rndis_free_response(configNr, buf);
-}
-EXPORT_SYMBOL_GPL(rndis_uninit);
-
-void rndis_set_host_mac(int configNr, const u8 *addr)
-{
- rndis_per_dev_params[configNr].host_mac = addr;
-}
-EXPORT_SYMBOL_GPL(rndis_set_host_mac);
-
-/*
- * Message Parser
- */
-int rndis_msg_parser(u8 configNr, u8 *buf)
-{
- u32 MsgType, MsgLength;
- __le32 *tmp;
- struct rndis_params *params;
-
- if (!buf)
- return -ENOMEM;
-
- tmp = (__le32 *)buf;
- MsgType = get_unaligned_le32(tmp++);
- MsgLength = get_unaligned_le32(tmp++);
-
- if (configNr >= RNDIS_MAX_CONFIGS)
- return -ENOTSUPP;
- params = &rndis_per_dev_params[configNr];
-
- /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
- * rx/tx statistics and link status, in addition to KEEPALIVE traffic
- * and normal HC level polling to see if there's any IN traffic.
- */
-
- /* For USB: responses may take up to 10 seconds */
- switch (MsgType) {
- case RNDIS_MSG_INIT:
- pr_debug("%s: RNDIS_MSG_INIT\n",
- __func__);
- params->state = RNDIS_INITIALIZED;
- return rndis_init_response(configNr,
- (rndis_init_msg_type *)buf);
-
- case RNDIS_MSG_HALT:
- pr_debug("%s: RNDIS_MSG_HALT\n",
- __func__);
- params->state = RNDIS_UNINITIALIZED;
- if (params->dev) {
- netif_carrier_off(params->dev);
- netif_stop_queue(params->dev);
- }
- return 0;
-
- case RNDIS_MSG_QUERY:
- return rndis_query_response(configNr,
- (rndis_query_msg_type *)buf);
-
- case RNDIS_MSG_SET:
- return rndis_set_response(configNr,
- (rndis_set_msg_type *)buf);
-
- case RNDIS_MSG_RESET:
- pr_debug("%s: RNDIS_MSG_RESET\n",
- __func__);
- return rndis_reset_response(configNr,
- (rndis_reset_msg_type *)buf);
-
- case RNDIS_MSG_KEEPALIVE:
- /* For USB: host does this every 5 seconds */
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
- __func__);
- return rndis_keepalive_response(configNr,
- (rndis_keepalive_msg_type *)
- buf);
-
- default:
- /* At least Windows XP emits some undefined RNDIS messages.
- * In one case those messages seemed to relate to the host
- * suspending itself.
- */
- pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
- __func__, MsgType, MsgLength);
- print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
- buf, MsgLength);
- break;
- }
-
- return -ENOTSUPP;
-}
-EXPORT_SYMBOL_GPL(rndis_msg_parser);
-
-int rndis_register(void (*resp_avail)(void *v), void *v)
-{
- u8 i;
-
- if (!resp_avail)
- return -EINVAL;
-
- for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
- if (!rndis_per_dev_params[i].used) {
- rndis_per_dev_params[i].used = 1;
- rndis_per_dev_params[i].resp_avail = resp_avail;
- rndis_per_dev_params[i].v = v;
- pr_debug("%s: configNr = %d\n", __func__, i);
- return i;
- }
- }
- pr_debug("failed\n");
-
- return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(rndis_register);
-
-void rndis_deregister(int configNr)
-{
- pr_debug("%s:\n", __func__);
-
- if (configNr >= RNDIS_MAX_CONFIGS) return;
- rndis_per_dev_params[configNr].used = 0;
-}
-EXPORT_SYMBOL_GPL(rndis_deregister);
-
-int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
-{
- pr_debug("%s:\n", __func__);
- if (!dev)
- return -EINVAL;
- if (configNr >= RNDIS_MAX_CONFIGS) return -1;
-
- rndis_per_dev_params[configNr].dev = dev;
- rndis_per_dev_params[configNr].filter = cdc_filter;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(rndis_set_param_dev);
-
-int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
-{
- pr_debug("%s:\n", __func__);
- if (!vendorDescr) return -1;
- if (configNr >= RNDIS_MAX_CONFIGS) return -1;
-
- rndis_per_dev_params[configNr].vendorID = vendorID;
- rndis_per_dev_params[configNr].vendorDescr = vendorDescr;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
-
-int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
-{
- pr_debug("%s: %u %u\n", __func__, medium, speed);
- if (configNr >= RNDIS_MAX_CONFIGS) return -1;
-
- rndis_per_dev_params[configNr].medium = medium;
- rndis_per_dev_params[configNr].speed = speed;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(rndis_set_param_medium);
-
-void rndis_add_hdr(struct sk_buff *skb)
-{
- struct rndis_packet_msg_type *header;
-
- if (!skb)
- return;
- header = (void *)skb_push(skb, sizeof(*header));
- memset(header, 0, sizeof *header);
- header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
- header->MessageLength = cpu_to_le32(skb->len);
- header->DataOffset = cpu_to_le32(36);
- header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
-}
-EXPORT_SYMBOL_GPL(rndis_add_hdr);
-
-void rndis_free_response(int configNr, u8 *buf)
-{
- rndis_resp_t *r;
- struct list_head *act, *tmp;
-
- list_for_each_safe(act, tmp,
- &(rndis_per_dev_params[configNr].resp_queue))
- {
- r = list_entry(act, rndis_resp_t, list);
- if (r && r->buf == buf) {
- list_del(&r->list);
- kfree(r);
- }
- }
-}
-EXPORT_SYMBOL_GPL(rndis_free_response);
-
-u8 *rndis_get_next_response(int configNr, u32 *length)
-{
- rndis_resp_t *r;
- struct list_head *act, *tmp;
-
- if (!length) return NULL;
-
- list_for_each_safe(act, tmp,
- &(rndis_per_dev_params[configNr].resp_queue))
- {
- r = list_entry(act, rndis_resp_t, list);
- if (!r->send) {
- r->send = 1;
- *length = r->length;
- return r->buf;
- }
- }
-
- return NULL;
-}
-EXPORT_SYMBOL_GPL(rndis_get_next_response);
-
-static rndis_resp_t *rndis_add_response(int configNr, u32 length)
-{
- rndis_resp_t *r;
-
- /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
- r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
- if (!r) return NULL;
-
- r->buf = (u8 *)(r + 1);
- r->length = length;
- r->send = 0;
-
- list_add_tail(&r->list,
- &(rndis_per_dev_params[configNr].resp_queue));
- return r;
-}
-
-int rndis_rm_hdr(struct gether *port,
- struct sk_buff *skb,
- struct sk_buff_head *list)
-{
- /* tmp points to a struct rndis_packet_msg_type */
- __le32 *tmp = (void *)skb->data;
-
- /* MessageType, MessageLength */
- if (cpu_to_le32(RNDIS_MSG_PACKET)
- != get_unaligned(tmp++)) {
- dev_kfree_skb_any(skb);
- return -EINVAL;
- }
- tmp++;
-
- /* DataOffset, DataLength */
- if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
- dev_kfree_skb_any(skb);
- return -EOVERFLOW;
- }
- skb_trim(skb, get_unaligned_le32(tmp++));
-
- skb_queue_tail(list, skb);
- return 0;
-}
-EXPORT_SYMBOL_GPL(rndis_rm_hdr);
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-static int rndis_proc_show(struct seq_file *m, void *v)
-{
- rndis_params *param = m->private;
-
- seq_printf(m,
- "Config Nr. %d\n"
- "used : %s\n"
- "state : %s\n"
- "medium : 0x%08X\n"
- "speed : %d\n"
- "cable : %s\n"
- "vendor ID : 0x%08X\n"
- "vendor : %s\n",
- param->confignr, (param->used) ? "y" : "n",
- ({ char *s = "?";
- switch (param->state) {
- case RNDIS_UNINITIALIZED:
- s = "RNDIS_UNINITIALIZED"; break;
- case RNDIS_INITIALIZED:
- s = "RNDIS_INITIALIZED"; break;
- case RNDIS_DATA_INITIALIZED:
- s = "RNDIS_DATA_INITIALIZED"; break;
- } s; }),
- param->medium,
- (param->media_state) ? 0 : param->speed*100,
- (param->media_state) ? "disconnected" : "connected",
- param->vendorID, param->vendorDescr);
- return 0;
-}
-
-static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- rndis_params *p = PDE_DATA(file_inode(file));
- u32 speed = 0;
- int i, fl_speed = 0;
-
- for (i = 0; i < count; i++) {
- char c;
- if (get_user(c, buffer))
- return -EFAULT;
- switch (c) {
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- fl_speed = 1;
- speed = speed * 10 + c - '0';
- break;
- case 'C':
- case 'c':
- rndis_signal_connect(p->confignr);
- break;
- case 'D':
- case 'd':
- rndis_signal_disconnect(p->confignr);
- break;
- default:
- if (fl_speed) p->speed = speed;
- else pr_debug("%c is not valid\n", c);
- break;
- }
-
- buffer++;
- }
-
- return count;
-}
-
-static int rndis_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, rndis_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations rndis_proc_fops = {
- .owner = THIS_MODULE,
- .open = rndis_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = rndis_proc_write,
-};
-
-#define NAME_TEMPLATE "driver/rndis-%03d"
-
-static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
-
-#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
-
-
-int rndis_init(void)
-{
- u8 i;
-
- for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- char name [20];
-
- sprintf(name, NAME_TEMPLATE, i);
- rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
- &rndis_proc_fops,
- (void *)(rndis_per_dev_params + i));
- if (!rndis_connect_state[i]) {
- pr_debug("%s: remove entries", __func__);
- while (i) {
- sprintf(name, NAME_TEMPLATE, --i);
- remove_proc_entry(name, NULL);
- }
- pr_debug("\n");
- return -EIO;
- }
-#endif
- rndis_per_dev_params[i].confignr = i;
- rndis_per_dev_params[i].used = 0;
- rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED;
- rndis_per_dev_params[i].media_state
- = RNDIS_MEDIA_STATE_DISCONNECTED;
- INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue));
- }
-
- return 0;
-}
-
-void rndis_exit(void)
-{
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- u8 i;
- char name[20];
-
- for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
- sprintf(name, NAME_TEMPLATE, i);
- remove_proc_entry(name, NULL);
- }
-#endif
-}
-
+++ /dev/null
-/*
- * RNDIS Definitions for Remote NDIS
- *
- * Authors: Benedikt Spranger, Pengutronix
- * Robert Schwebel, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2, as published by the Free Software Foundation.
- *
- * This software was originally developed in conformance with
- * Microsoft's Remote NDIS Specification License Agreement.
- */
-
-#ifndef _LINUX_RNDIS_H
-#define _LINUX_RNDIS_H
-
-#include <linux/rndis.h>
-#include "u_ether.h"
-#include "ndis.h"
-
-#define RNDIS_MAXIMUM_FRAME_SIZE 1518
-#define RNDIS_MAX_TOTAL_SIZE 1558
-
-typedef struct rndis_init_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 MajorVersion;
- __le32 MinorVersion;
- __le32 MaxTransferSize;
-} rndis_init_msg_type;
-
-typedef struct rndis_init_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
- __le32 MajorVersion;
- __le32 MinorVersion;
- __le32 DeviceFlags;
- __le32 Medium;
- __le32 MaxPacketsPerTransfer;
- __le32 MaxTransferSize;
- __le32 PacketAlignmentFactor;
- __le32 AFListOffset;
- __le32 AFListSize;
-} rndis_init_cmplt_type;
-
-typedef struct rndis_halt_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
-} rndis_halt_msg_type;
-
-typedef struct rndis_query_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 OID;
- __le32 InformationBufferLength;
- __le32 InformationBufferOffset;
- __le32 DeviceVcHandle;
-} rndis_query_msg_type;
-
-typedef struct rndis_query_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
- __le32 InformationBufferLength;
- __le32 InformationBufferOffset;
-} rndis_query_cmplt_type;
-
-typedef struct rndis_set_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 OID;
- __le32 InformationBufferLength;
- __le32 InformationBufferOffset;
- __le32 DeviceVcHandle;
-} rndis_set_msg_type;
-
-typedef struct rndis_set_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
-} rndis_set_cmplt_type;
-
-typedef struct rndis_reset_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 Reserved;
-} rndis_reset_msg_type;
-
-typedef struct rndis_reset_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 Status;
- __le32 AddressingReset;
-} rndis_reset_cmplt_type;
-
-typedef struct rndis_indicate_status_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 Status;
- __le32 StatusBufferLength;
- __le32 StatusBufferOffset;
-} rndis_indicate_status_msg_type;
-
-typedef struct rndis_keepalive_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
-} rndis_keepalive_msg_type;
-
-typedef struct rndis_keepalive_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
-} rndis_keepalive_cmplt_type;
-
-struct rndis_packet_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 DataOffset;
- __le32 DataLength;
- __le32 OOBDataOffset;
- __le32 OOBDataLength;
- __le32 NumOOBDataElements;
- __le32 PerPacketInfoOffset;
- __le32 PerPacketInfoLength;
- __le32 VcHandle;
- __le32 Reserved;
-} __attribute__ ((packed));
-
-struct rndis_config_parameter
-{
- __le32 ParameterNameOffset;
- __le32 ParameterNameLength;
- __le32 ParameterType;
- __le32 ParameterValueOffset;
- __le32 ParameterValueLength;
-};
-
-/* implementation specific */
-enum rndis_state
-{
- RNDIS_UNINITIALIZED,
- RNDIS_INITIALIZED,
- RNDIS_DATA_INITIALIZED,
-};
-
-typedef struct rndis_resp_t
-{
- struct list_head list;
- u8 *buf;
- u32 length;
- int send;
-} rndis_resp_t;
-
-typedef struct rndis_params
-{
- u8 confignr;
- u8 used;
- u16 saved_filter;
- enum rndis_state state;
- u32 medium;
- u32 speed;
- u32 media_state;
-
- const u8 *host_mac;
- u16 *filter;
- struct net_device *dev;
-
- u32 vendorID;
- const char *vendorDescr;
- void (*resp_avail)(void *v);
- void *v;
- struct list_head resp_queue;
-} rndis_params;
-
-/* RNDIS Message parser and other useless functions */
-int rndis_msg_parser (u8 configNr, u8 *buf);
-int rndis_register(void (*resp_avail)(void *v), void *v);
-void rndis_deregister (int configNr);
-int rndis_set_param_dev (u8 configNr, struct net_device *dev,
- u16 *cdc_filter);
-int rndis_set_param_vendor (u8 configNr, u32 vendorID,
- const char *vendorDescr);
-int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
-void rndis_add_hdr (struct sk_buff *skb);
-int rndis_rm_hdr(struct gether *port, struct sk_buff *skb,
- struct sk_buff_head *list);
-u8 *rndis_get_next_response (int configNr, u32 *length);
-void rndis_free_response (int configNr, u8 *buf);
-
-void rndis_uninit (int configNr);
-int rndis_signal_connect (int configNr);
-int rndis_signal_disconnect (int configNr);
-int rndis_state (int configNr);
-extern void rndis_set_host_mac (int configNr, const u8 *addr);
-
-#endif /* _LINUX_RNDIS_H */
+++ /dev/null
-/*
- * storage_common.c -- Common definitions for mass storage functionality
- *
- * Copyright (C) 2003-2008 Alan Stern
- * Copyeight (C) 2009 Samsung Electronics
- * Author: Michal Nazarewicz (mina86@mina86.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/*
- * This file requires the following identifiers used in USB strings to
- * be defined (each of type pointer to char):
- * - fsg_string_interface -- name of the interface
- */
-
-/*
- * When USB_GADGET_DEBUG_FILES is defined the module param num_buffers
- * sets the number of pipeline buffers (length of the fsg_buffhd array).
- * The valid range of num_buffers is: num >= 2 && num <= 4.
- */
-
-#include <linux/module.h>
-#include <linux/blkdev.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/usb/composite.h>
-
-#include "storage_common.h"
-
-/* There is only one interface. */
-
-struct usb_interface_descriptor fsg_intf_desc = {
- .bLength = sizeof fsg_intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bNumEndpoints = 2, /* Adjusted during fsg_bind() */
- .bInterfaceClass = USB_CLASS_MASS_STORAGE,
- .bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
- .bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
- .iInterface = FSG_STRING_INTERFACE,
-};
-EXPORT_SYMBOL_GPL(fsg_intf_desc);
-
-/*
- * Three full-speed endpoint descriptors: bulk-in, bulk-out, and
- * interrupt-in.
- */
-
-struct usb_endpoint_descriptor fsg_fs_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- /* wMaxPacketSize set by autoconfiguration */
-};
-EXPORT_SYMBOL_GPL(fsg_fs_bulk_in_desc);
-
-struct usb_endpoint_descriptor fsg_fs_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- /* wMaxPacketSize set by autoconfiguration */
-};
-EXPORT_SYMBOL_GPL(fsg_fs_bulk_out_desc);
-
-struct usb_descriptor_header *fsg_fs_function[] = {
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
- NULL,
-};
-EXPORT_SYMBOL_GPL(fsg_fs_function);
-
-
-/*
- * USB 2.0 devices need to expose both high speed and full speed
- * descriptors, unless they only run at full speed.
- *
- * That means alternate endpoint descriptors (bigger packets)
- * and a "device qualifier" ... plus more construction options
- * for the configuration descriptor.
- */
-struct usb_endpoint_descriptor fsg_hs_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-EXPORT_SYMBOL_GPL(fsg_hs_bulk_in_desc);
-
-struct usb_endpoint_descriptor fsg_hs_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
- .bInterval = 1, /* NAK every 1 uframe */
-};
-EXPORT_SYMBOL_GPL(fsg_hs_bulk_out_desc);
-
-
-struct usb_descriptor_header *fsg_hs_function[] = {
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
- NULL,
-};
-EXPORT_SYMBOL_GPL(fsg_hs_function);
-
-struct usb_endpoint_descriptor fsg_ss_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-EXPORT_SYMBOL_GPL(fsg_ss_bulk_in_desc);
-
-struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc = {
- .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /*.bMaxBurst = DYNAMIC, */
-};
-EXPORT_SYMBOL_GPL(fsg_ss_bulk_in_comp_desc);
-
-struct usb_endpoint_descriptor fsg_ss_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_desc);
-
-struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
- .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /*.bMaxBurst = DYNAMIC, */
-};
-EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_comp_desc);
-
-struct usb_descriptor_header *fsg_ss_function[] = {
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_in_comp_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_out_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_out_comp_desc,
- NULL,
-};
-EXPORT_SYMBOL_GPL(fsg_ss_function);
-
-
- /*-------------------------------------------------------------------------*/
-
-/*
- * If the next two routines are called while the gadget is registered,
- * the caller must own fsg->filesem for writing.
- */
-
-void fsg_lun_close(struct fsg_lun *curlun)
-{
- if (curlun->filp) {
- LDBG(curlun, "close backing file\n");
- fput(curlun->filp);
- curlun->filp = NULL;
- }
-}
-EXPORT_SYMBOL_GPL(fsg_lun_close);
-
-int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
-{
- int ro;
- struct file *filp = NULL;
- int rc = -EINVAL;
- struct inode *inode = NULL;
- loff_t size;
- loff_t num_sectors;
- loff_t min_sectors;
- unsigned int blkbits;
- unsigned int blksize;
-
- /* R/W if we can, R/O if we must */
- ro = curlun->initially_ro;
- if (!ro) {
- filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
- if (PTR_ERR(filp) == -EROFS || PTR_ERR(filp) == -EACCES)
- ro = 1;
- }
- if (ro)
- filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
- if (IS_ERR(filp)) {
- LINFO(curlun, "unable to open backing file: %s\n", filename);
- return PTR_ERR(filp);
- }
-
- if (!(filp->f_mode & FMODE_WRITE))
- ro = 1;
-
- inode = file_inode(filp);
- if ((!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))) {
- LINFO(curlun, "invalid file type: %s\n", filename);
- goto out;
- }
-
- /*
- * If we can't read the file, it's no good.
- * If we can't write the file, use it read-only.
- */
- if (!(filp->f_mode & FMODE_CAN_READ)) {
- LINFO(curlun, "file not readable: %s\n", filename);
- goto out;
- }
- if (!(filp->f_mode & FMODE_CAN_WRITE))
- ro = 1;
-
- size = i_size_read(inode->i_mapping->host);
- if (size < 0) {
- LINFO(curlun, "unable to find file size: %s\n", filename);
- rc = (int) size;
- goto out;
- }
-
- if (curlun->cdrom) {
- blksize = 2048;
- blkbits = 11;
- } else if (inode->i_bdev) {
- blksize = bdev_logical_block_size(inode->i_bdev);
- blkbits = blksize_bits(blksize);
- } else {
- blksize = 512;
- blkbits = 9;
- }
-
- num_sectors = size >> blkbits; /* File size in logic-block-size blocks */
- min_sectors = 1;
- if (curlun->cdrom) {
- min_sectors = 300; /* Smallest track is 300 frames */
- if (num_sectors >= 256*60*75) {
- num_sectors = 256*60*75 - 1;
- LINFO(curlun, "file too big: %s\n", filename);
- LINFO(curlun, "using only first %d blocks\n",
- (int) num_sectors);
- }
- }
- if (num_sectors < min_sectors) {
- LINFO(curlun, "file too small: %s\n", filename);
- rc = -ETOOSMALL;
- goto out;
- }
-
- if (fsg_lun_is_open(curlun))
- fsg_lun_close(curlun);
-
- curlun->blksize = blksize;
- curlun->blkbits = blkbits;
- curlun->ro = ro;
- curlun->filp = filp;
- curlun->file_length = size;
- curlun->num_sectors = num_sectors;
- LDBG(curlun, "open backing file: %s\n", filename);
- return 0;
-
-out:
- fput(filp);
- return rc;
-}
-EXPORT_SYMBOL_GPL(fsg_lun_open);
-
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Sync the file data, don't bother with the metadata.
- * This code was copied from fs/buffer.c:sys_fdatasync().
- */
-int fsg_lun_fsync_sub(struct fsg_lun *curlun)
-{
- struct file *filp = curlun->filp;
-
- if (curlun->ro || !filp)
- return 0;
- return vfs_fsync(filp, 1);
-}
-EXPORT_SYMBOL_GPL(fsg_lun_fsync_sub);
-
-void store_cdrom_address(u8 *dest, int msf, u32 addr)
-{
- if (msf) {
- /* Convert to Minutes-Seconds-Frames */
- addr >>= 2; /* Convert to 2048-byte frames */
- addr += 2*75; /* Lead-in occupies 2 seconds */
- dest[3] = addr % 75; /* Frames */
- addr /= 75;
- dest[2] = addr % 60; /* Seconds */
- addr /= 60;
- dest[1] = addr; /* Minutes */
- dest[0] = 0; /* Reserved */
- } else {
- /* Absolute sector */
- put_unaligned_be32(addr, dest);
- }
-}
-EXPORT_SYMBOL_GPL(store_cdrom_address);
-
-/*-------------------------------------------------------------------------*/
-
-
-ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf)
-{
- return sprintf(buf, "%d\n", fsg_lun_is_open(curlun)
- ? curlun->ro
- : curlun->initially_ro);
-}
-EXPORT_SYMBOL_GPL(fsg_show_ro);
-
-ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf)
-{
- return sprintf(buf, "%u\n", curlun->nofua);
-}
-EXPORT_SYMBOL_GPL(fsg_show_nofua);
-
-ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- char *buf)
-{
- char *p;
- ssize_t rc;
-
- down_read(filesem);
- if (fsg_lun_is_open(curlun)) { /* Get the complete pathname */
- p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
- if (IS_ERR(p))
- rc = PTR_ERR(p);
- else {
- rc = strlen(p);
- memmove(buf, p, rc);
- buf[rc] = '\n'; /* Add a newline */
- buf[++rc] = 0;
- }
- } else { /* No file, return 0 bytes */
- *buf = 0;
- rc = 0;
- }
- up_read(filesem);
- return rc;
-}
-EXPORT_SYMBOL_GPL(fsg_show_file);
-
-ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf)
-{
- return sprintf(buf, "%u\n", curlun->cdrom);
-}
-EXPORT_SYMBOL_GPL(fsg_show_cdrom);
-
-ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf)
-{
- return sprintf(buf, "%u\n", curlun->removable);
-}
-EXPORT_SYMBOL_GPL(fsg_show_removable);
-
-/*
- * The caller must hold fsg->filesem for reading when calling this function.
- */
-static ssize_t _fsg_store_ro(struct fsg_lun *curlun, bool ro)
-{
- if (fsg_lun_is_open(curlun)) {
- LDBG(curlun, "read-only status change prevented\n");
- return -EBUSY;
- }
-
- curlun->ro = ro;
- curlun->initially_ro = ro;
- LDBG(curlun, "read-only status set to %d\n", curlun->ro);
-
- return 0;
-}
-
-ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- const char *buf, size_t count)
-{
- ssize_t rc;
- bool ro;
-
- rc = strtobool(buf, &ro);
- if (rc)
- return rc;
-
- /*
- * Allow the write-enable status to change only while the
- * backing file is closed.
- */
- down_read(filesem);
- rc = _fsg_store_ro(curlun, ro);
- if (!rc)
- rc = count;
- up_read(filesem);
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(fsg_store_ro);
-
-ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count)
-{
- bool nofua;
- int ret;
-
- ret = strtobool(buf, &nofua);
- if (ret)
- return ret;
-
- /* Sync data when switching from async mode to sync */
- if (!nofua && curlun->nofua)
- fsg_lun_fsync_sub(curlun);
-
- curlun->nofua = nofua;
-
- return count;
-}
-EXPORT_SYMBOL_GPL(fsg_store_nofua);
-
-ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- const char *buf, size_t count)
-{
- int rc = 0;
-
- if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {
- LDBG(curlun, "eject attempt prevented\n");
- return -EBUSY; /* "Door is locked" */
- }
-
- /* Remove a trailing newline */
- if (count > 0 && buf[count-1] == '\n')
- ((char *) buf)[count-1] = 0; /* Ugh! */
-
- /* Load new medium */
- down_write(filesem);
- if (count > 0 && buf[0]) {
- /* fsg_lun_open() will close existing file if any. */
- rc = fsg_lun_open(curlun, buf);
- if (rc == 0)
- curlun->unit_attention_data =
- SS_NOT_READY_TO_READY_TRANSITION;
- } else if (fsg_lun_is_open(curlun)) {
- fsg_lun_close(curlun);
- curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
- }
- up_write(filesem);
- return (rc < 0 ? rc : count);
-}
-EXPORT_SYMBOL_GPL(fsg_store_file);
-
-ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- const char *buf, size_t count)
-{
- bool cdrom;
- int ret;
-
- ret = strtobool(buf, &cdrom);
- if (ret)
- return ret;
-
- down_read(filesem);
- ret = cdrom ? _fsg_store_ro(curlun, true) : 0;
-
- if (!ret) {
- curlun->cdrom = cdrom;
- ret = count;
- }
- up_read(filesem);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(fsg_store_cdrom);
-
-ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
- size_t count)
-{
- bool removable;
- int ret;
-
- ret = strtobool(buf, &removable);
- if (ret)
- return ret;
-
- curlun->removable = removable;
-
- return count;
-}
-EXPORT_SYMBOL_GPL(fsg_store_removable);
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-#ifndef USB_STORAGE_COMMON_H
-#define USB_STORAGE_COMMON_H
-
-#include <linux/device.h>
-#include <linux/usb/storage.h>
-#include <scsi/scsi.h>
-#include <asm/unaligned.h>
-
-#ifndef DEBUG
-#undef VERBOSE_DEBUG
-#undef DUMP_MSGS
-#endif /* !DEBUG */
-
-#ifdef VERBOSE_DEBUG
-#define VLDBG LDBG
-#else
-#define VLDBG(lun, fmt, args...) do { } while (0)
-#endif /* VERBOSE_DEBUG */
-
-#define _LMSG(func, lun, fmt, args...) \
- do { \
- if ((lun)->name_pfx && *(lun)->name_pfx) \
- func("%s/%s: " fmt, *(lun)->name_pfx, \
- (lun)->name, ## args); \
- else \
- func("%s: " fmt, (lun)->name, ## args); \
- } while (0)
-
-#define LDBG(lun, fmt, args...) _LMSG(pr_debug, lun, fmt, ## args)
-#define LERROR(lun, fmt, args...) _LMSG(pr_err, lun, fmt, ## args)
-#define LWARN(lun, fmt, args...) _LMSG(pr_warn, lun, fmt, ## args)
-#define LINFO(lun, fmt, args...) _LMSG(pr_info, lun, fmt, ## args)
-
-
-#ifdef DUMP_MSGS
-
-# define dump_msg(fsg, /* const char * */ label, \
- /* const u8 * */ buf, /* unsigned */ length) \
-do { \
- if (length < 512) { \
- DBG(fsg, "%s, length %u:\n", label, length); \
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
- 16, 1, buf, length, 0); \
- } \
-} while (0)
-
-# define dump_cdb(fsg) do { } while (0)
-
-#else
-
-# define dump_msg(fsg, /* const char * */ label, \
- /* const u8 * */ buf, /* unsigned */ length) do { } while (0)
-
-# ifdef VERBOSE_DEBUG
-
-# define dump_cdb(fsg) \
- print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
- 16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
-
-# else
-
-# define dump_cdb(fsg) do { } while (0)
-
-# endif /* VERBOSE_DEBUG */
-
-#endif /* DUMP_MSGS */
-
-/* Length of a SCSI Command Data Block */
-#define MAX_COMMAND_SIZE 16
-
-/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
-#define SS_NO_SENSE 0
-#define SS_COMMUNICATION_FAILURE 0x040800
-#define SS_INVALID_COMMAND 0x052000
-#define SS_INVALID_FIELD_IN_CDB 0x052400
-#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
-#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
-#define SS_MEDIUM_NOT_PRESENT 0x023a00
-#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
-#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
-#define SS_RESET_OCCURRED 0x062900
-#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
-#define SS_UNRECOVERED_READ_ERROR 0x031100
-#define SS_WRITE_ERROR 0x030c02
-#define SS_WRITE_PROTECTED 0x072700
-
-#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
-#define ASC(x) ((u8) ((x) >> 8))
-#define ASCQ(x) ((u8) (x))
-
-struct fsg_lun {
- struct file *filp;
- loff_t file_length;
- loff_t num_sectors;
-
- unsigned int initially_ro:1;
- unsigned int ro:1;
- unsigned int removable:1;
- unsigned int cdrom:1;
- unsigned int prevent_medium_removal:1;
- unsigned int registered:1;
- unsigned int info_valid:1;
- unsigned int nofua:1;
-
- u32 sense_data;
- u32 sense_data_info;
- u32 unit_attention_data;
-
- unsigned int blkbits; /* Bits of logical block size
- of bound block device */
- unsigned int blksize; /* logical block size of bound block device */
- struct device dev;
- const char *name; /* "lun.name" */
- const char **name_pfx; /* "function.name" */
-};
-
-static inline bool fsg_lun_is_open(struct fsg_lun *curlun)
-{
- return curlun->filp != NULL;
-}
-
-/* Default size of buffer length. */
-#define FSG_BUFLEN ((u32)16384)
-
-/* Maximal number of LUNs supported in mass storage function */
-#define FSG_MAX_LUNS 8
-
-enum fsg_buffer_state {
- BUF_STATE_EMPTY = 0,
- BUF_STATE_FULL,
- BUF_STATE_BUSY
-};
-
-struct fsg_buffhd {
- void *buf;
- enum fsg_buffer_state state;
- struct fsg_buffhd *next;
-
- /*
- * The NetChip 2280 is faster, and handles some protocol faults
- * better, if we don't submit any short bulk-out read requests.
- * So we will record the intended request length here.
- */
- unsigned int bulk_out_intended_length;
-
- struct usb_request *inreq;
- int inreq_busy;
- struct usb_request *outreq;
- int outreq_busy;
-};
-
-enum fsg_state {
- /* This one isn't used anywhere */
- FSG_STATE_COMMAND_PHASE = -10,
- FSG_STATE_DATA_PHASE,
- FSG_STATE_STATUS_PHASE,
-
- FSG_STATE_IDLE = 0,
- FSG_STATE_ABORT_BULK_OUT,
- FSG_STATE_RESET,
- FSG_STATE_INTERFACE_CHANGE,
- FSG_STATE_CONFIG_CHANGE,
- FSG_STATE_DISCONNECT,
- FSG_STATE_EXIT,
- FSG_STATE_TERMINATED
-};
-
-enum data_direction {
- DATA_DIR_UNKNOWN = 0,
- DATA_DIR_FROM_HOST,
- DATA_DIR_TO_HOST,
- DATA_DIR_NONE
-};
-
-static inline u32 get_unaligned_be24(u8 *buf)
-{
- return 0xffffff & (u32) get_unaligned_be32(buf - 1);
-}
-
-static inline struct fsg_lun *fsg_lun_from_dev(struct device *dev)
-{
- return container_of(dev, struct fsg_lun, dev);
-}
-
-enum {
- FSG_STRING_INTERFACE
-};
-
-extern struct usb_interface_descriptor fsg_intf_desc;
-
-extern struct usb_endpoint_descriptor fsg_fs_bulk_in_desc;
-extern struct usb_endpoint_descriptor fsg_fs_bulk_out_desc;
-extern struct usb_descriptor_header *fsg_fs_function[];
-
-extern struct usb_endpoint_descriptor fsg_hs_bulk_in_desc;
-extern struct usb_endpoint_descriptor fsg_hs_bulk_out_desc;
-extern struct usb_descriptor_header *fsg_hs_function[];
-
-extern struct usb_endpoint_descriptor fsg_ss_bulk_in_desc;
-extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc;
-extern struct usb_endpoint_descriptor fsg_ss_bulk_out_desc;
-extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc;
-extern struct usb_descriptor_header *fsg_ss_function[];
-
-void fsg_lun_close(struct fsg_lun *curlun);
-int fsg_lun_open(struct fsg_lun *curlun, const char *filename);
-int fsg_lun_fsync_sub(struct fsg_lun *curlun);
-void store_cdrom_address(u8 *dest, int msf, u32 addr);
-ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf);
-ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf);
-ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- char *buf);
-ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf);
-ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf);
-ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- const char *buf, size_t count);
-ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count);
-ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- const char *buf, size_t count);
-ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
- const char *buf, size_t count);
-ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
- size_t count);
-
-#endif /* USB_STORAGE_COMMON_H */
+++ /dev/null
-/*
- * u_ecm.h
- *
- * Utility definitions for the ecm function
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef U_ECM_H
-#define U_ECM_H
-
-#include <linux/usb/composite.h>
-
-struct f_ecm_opts {
- struct usb_function_instance func_inst;
- struct net_device *net;
- bool bound;
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-#endif /* U_ECM_H */
+++ /dev/null
-/*
- * u_eem.h
- *
- * Utility definitions for the eem function
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef U_EEM_H
-#define U_EEM_H
-
-#include <linux/usb/composite.h>
-
-struct f_eem_opts {
- struct usb_function_instance func_inst;
- struct net_device *net;
- bool bound;
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-#endif /* U_EEM_H */
+++ /dev/null
-/*
- * u_ether.c -- Ethernet-over-USB link layer utilities for Gadget stack
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/gfp.h>
-#include <linux/device.h>
-#include <linux/ctype.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/if_vlan.h>
-
-#include "u_ether.h"
-
-
-/*
- * This component encapsulates the Ethernet link glue needed to provide
- * one (!) network link through the USB gadget stack, normally "usb0".
- *
- * The control and data models are handled by the function driver which
- * connects to this code; such as CDC Ethernet (ECM or EEM),
- * "CDC Subset", or RNDIS. That includes all descriptor and endpoint
- * management.
- *
- * Link level addressing is handled by this component using module
- * parameters; if no such parameters are provided, random link level
- * addresses are used. Each end of the link uses one address. The
- * host end address is exported in various ways, and is often recorded
- * in configuration databases.
- *
- * The driver which assembles each configuration using such a link is
- * responsible for ensuring that each configuration includes at most one
- * instance of is network link. (The network layer provides ways for
- * this single "physical" link to be used by multiple virtual links.)
- */
-
-#define UETH__VERSION "29-May-2008"
-
-struct eth_dev {
- /* lock is held while accessing port_usb
- */
- spinlock_t lock;
- struct gether *port_usb;
-
- struct net_device *net;
- struct usb_gadget *gadget;
-
- spinlock_t req_lock; /* guard {rx,tx}_reqs */
- struct list_head tx_reqs, rx_reqs;
- atomic_t tx_qlen;
-
- struct sk_buff_head rx_frames;
-
- unsigned qmult;
-
- unsigned header_len;
- struct sk_buff *(*wrap)(struct gether *, struct sk_buff *skb);
- int (*unwrap)(struct gether *,
- struct sk_buff *skb,
- struct sk_buff_head *list);
-
- struct work_struct work;
-
- unsigned long todo;
-#define WORK_RX_MEMORY 0
-
- bool zlp;
- u8 host_mac[ETH_ALEN];
- u8 dev_mac[ETH_ALEN];
-};
-
-/*-------------------------------------------------------------------------*/
-
-#define RX_EXTRA 20 /* bytes guarding against rx overflows */
-
-#define DEFAULT_QLEN 2 /* double buffering by default */
-
-/* for dual-speed hardware, use deeper queues at high/super speed */
-static inline int qlen(struct usb_gadget *gadget, unsigned qmult)
-{
- if (gadget_is_dualspeed(gadget) && (gadget->speed == USB_SPEED_HIGH ||
- gadget->speed == USB_SPEED_SUPER))
- return qmult * DEFAULT_QLEN;
- else
- return DEFAULT_QLEN;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* REVISIT there must be a better way than having two sets
- * of debug calls ...
- */
-
-#undef DBG
-#undef VDBG
-#undef ERROR
-#undef INFO
-
-#define xprintk(d, level, fmt, args...) \
- printk(level "%s: " fmt , (d)->net->name , ## args)
-
-#ifdef DEBUG
-#undef DEBUG
-#define DBG(dev, fmt, args...) \
- xprintk(dev , KERN_DEBUG , fmt , ## args)
-#else
-#define DBG(dev, fmt, args...) \
- do { } while (0)
-#endif /* DEBUG */
-
-#ifdef VERBOSE_DEBUG
-#define VDBG DBG
-#else
-#define VDBG(dev, fmt, args...) \
- do { } while (0)
-#endif /* DEBUG */
-
-#define ERROR(dev, fmt, args...) \
- xprintk(dev , KERN_ERR , fmt , ## args)
-#define INFO(dev, fmt, args...) \
- xprintk(dev , KERN_INFO , fmt , ## args)
-
-/*-------------------------------------------------------------------------*/
-
-/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
-
-static int ueth_change_mtu(struct net_device *net, int new_mtu)
-{
- struct eth_dev *dev = netdev_priv(net);
- unsigned long flags;
- int status = 0;
-
- /* don't change MTU on "live" link (peer won't know) */
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb)
- status = -EBUSY;
- else if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
- status = -ERANGE;
- else
- net->mtu = new_mtu;
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return status;
-}
-
-static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
-{
- struct eth_dev *dev = netdev_priv(net);
-
- strlcpy(p->driver, "g_ether", sizeof(p->driver));
- strlcpy(p->version, UETH__VERSION, sizeof(p->version));
- strlcpy(p->fw_version, dev->gadget->name, sizeof(p->fw_version));
- strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof(p->bus_info));
-}
-
-/* REVISIT can also support:
- * - WOL (by tracking suspends and issuing remote wakeup)
- * - msglevel (implies updated messaging)
- * - ... probably more ethtool ops
- */
-
-static const struct ethtool_ops ops = {
- .get_drvinfo = eth_get_drvinfo,
- .get_link = ethtool_op_get_link,
-};
-
-static void defer_kevent(struct eth_dev *dev, int flag)
-{
- if (test_and_set_bit(flag, &dev->todo))
- return;
- if (!schedule_work(&dev->work))
- ERROR(dev, "kevent %d may have been dropped\n", flag);
- else
- DBG(dev, "kevent %d scheduled\n", flag);
-}
-
-static void rx_complete(struct usb_ep *ep, struct usb_request *req);
-
-static int
-rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
-{
- struct sk_buff *skb;
- int retval = -ENOMEM;
- size_t size = 0;
- struct usb_ep *out;
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb)
- out = dev->port_usb->out_ep;
- else
- out = NULL;
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (!out)
- return -ENOTCONN;
-
-
- /* Padding up to RX_EXTRA handles minor disagreements with host.
- * Normally we use the USB "terminate on short read" convention;
- * so allow up to (N*maxpacket), since that memory is normally
- * already allocated. Some hardware doesn't deal well with short
- * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
- * byte off the end (to force hardware errors on overflow).
- *
- * RNDIS uses internal framing, and explicitly allows senders to
- * pad to end-of-packet. That's potentially nice for speed, but
- * means receivers can't recover lost synch on their own (because
- * new packets don't only start after a short RX).
- */
- size += sizeof(struct ethhdr) + dev->net->mtu + RX_EXTRA;
- size += dev->port_usb->header_len;
- size += out->maxpacket - 1;
- size -= size % out->maxpacket;
-
- if (dev->port_usb->is_fixed)
- size = max_t(size_t, size, dev->port_usb->fixed_out_len);
-
- skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
- if (skb == NULL) {
- DBG(dev, "no rx skb\n");
- goto enomem;
- }
-
- /* Some platforms perform better when IP packets are aligned,
- * but on at least one, checksumming fails otherwise. Note:
- * RNDIS headers involve variable numbers of LE32 values.
- */
- skb_reserve(skb, NET_IP_ALIGN);
-
- req->buf = skb->data;
- req->length = size;
- req->complete = rx_complete;
- req->context = skb;
-
- retval = usb_ep_queue(out, req, gfp_flags);
- if (retval == -ENOMEM)
-enomem:
- defer_kevent(dev, WORK_RX_MEMORY);
- if (retval) {
- DBG(dev, "rx submit --> %d\n", retval);
- if (skb)
- dev_kfree_skb_any(skb);
- spin_lock_irqsave(&dev->req_lock, flags);
- list_add(&req->list, &dev->rx_reqs);
- spin_unlock_irqrestore(&dev->req_lock, flags);
- }
- return retval;
-}
-
-static void rx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = req->context, *skb2;
- struct eth_dev *dev = ep->driver_data;
- int status = req->status;
-
- switch (status) {
-
- /* normal completion */
- case 0:
- skb_put(skb, req->actual);
-
- if (dev->unwrap) {
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb) {
- status = dev->unwrap(dev->port_usb,
- skb,
- &dev->rx_frames);
- } else {
- dev_kfree_skb_any(skb);
- status = -ENOTCONN;
- }
- spin_unlock_irqrestore(&dev->lock, flags);
- } else {
- skb_queue_tail(&dev->rx_frames, skb);
- }
- skb = NULL;
-
- skb2 = skb_dequeue(&dev->rx_frames);
- while (skb2) {
- if (status < 0
- || ETH_HLEN > skb2->len
- || skb2->len > VLAN_ETH_FRAME_LEN) {
- dev->net->stats.rx_errors++;
- dev->net->stats.rx_length_errors++;
- DBG(dev, "rx length %d\n", skb2->len);
- dev_kfree_skb_any(skb2);
- goto next_frame;
- }
- skb2->protocol = eth_type_trans(skb2, dev->net);
- dev->net->stats.rx_packets++;
- dev->net->stats.rx_bytes += skb2->len;
-
- /* no buffer copies needed, unless hardware can't
- * use skb buffers.
- */
- status = netif_rx(skb2);
-next_frame:
- skb2 = skb_dequeue(&dev->rx_frames);
- }
- break;
-
- /* software-driven interface shutdown */
- case -ECONNRESET: /* unlink */
- case -ESHUTDOWN: /* disconnect etc */
- VDBG(dev, "rx shutdown, code %d\n", status);
- goto quiesce;
-
- /* for hardware automagic (such as pxa) */
- case -ECONNABORTED: /* endpoint reset */
- DBG(dev, "rx %s reset\n", ep->name);
- defer_kevent(dev, WORK_RX_MEMORY);
-quiesce:
- dev_kfree_skb_any(skb);
- goto clean;
-
- /* data overrun */
- case -EOVERFLOW:
- dev->net->stats.rx_over_errors++;
- /* FALLTHROUGH */
-
- default:
- dev->net->stats.rx_errors++;
- DBG(dev, "rx status %d\n", status);
- break;
- }
-
- if (skb)
- dev_kfree_skb_any(skb);
- if (!netif_running(dev->net)) {
-clean:
- spin_lock(&dev->req_lock);
- list_add(&req->list, &dev->rx_reqs);
- spin_unlock(&dev->req_lock);
- req = NULL;
- }
- if (req)
- rx_submit(dev, req, GFP_ATOMIC);
-}
-
-static int prealloc(struct list_head *list, struct usb_ep *ep, unsigned n)
-{
- unsigned i;
- struct usb_request *req;
-
- if (!n)
- return -ENOMEM;
-
- /* queue/recycle up to N requests */
- i = n;
- list_for_each_entry(req, list, list) {
- if (i-- == 0)
- goto extra;
- }
- while (i--) {
- req = usb_ep_alloc_request(ep, GFP_ATOMIC);
- if (!req)
- return list_empty(list) ? -ENOMEM : 0;
- list_add(&req->list, list);
- }
- return 0;
-
-extra:
- /* free extras */
- for (;;) {
- struct list_head *next;
-
- next = req->list.next;
- list_del(&req->list);
- usb_ep_free_request(ep, req);
-
- if (next == list)
- break;
-
- req = container_of(next, struct usb_request, list);
- }
- return 0;
-}
-
-static int alloc_requests(struct eth_dev *dev, struct gether *link, unsigned n)
-{
- int status;
-
- spin_lock(&dev->req_lock);
- status = prealloc(&dev->tx_reqs, link->in_ep, n);
- if (status < 0)
- goto fail;
- status = prealloc(&dev->rx_reqs, link->out_ep, n);
- if (status < 0)
- goto fail;
- goto done;
-fail:
- DBG(dev, "can't alloc requests\n");
-done:
- spin_unlock(&dev->req_lock);
- return status;
-}
-
-static void rx_fill(struct eth_dev *dev, gfp_t gfp_flags)
-{
- struct usb_request *req;
- unsigned long flags;
-
- /* fill unused rxq slots with some skb */
- spin_lock_irqsave(&dev->req_lock, flags);
- while (!list_empty(&dev->rx_reqs)) {
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del_init(&req->list);
- spin_unlock_irqrestore(&dev->req_lock, flags);
-
- if (rx_submit(dev, req, gfp_flags) < 0) {
- defer_kevent(dev, WORK_RX_MEMORY);
- return;
- }
-
- spin_lock_irqsave(&dev->req_lock, flags);
- }
- spin_unlock_irqrestore(&dev->req_lock, flags);
-}
-
-static void eth_work(struct work_struct *work)
-{
- struct eth_dev *dev = container_of(work, struct eth_dev, work);
-
- if (test_and_clear_bit(WORK_RX_MEMORY, &dev->todo)) {
- if (netif_running(dev->net))
- rx_fill(dev, GFP_KERNEL);
- }
-
- if (dev->todo)
- DBG(dev, "work done, flags = 0x%lx\n", dev->todo);
-}
-
-static void tx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = req->context;
- struct eth_dev *dev = ep->driver_data;
-
- switch (req->status) {
- default:
- dev->net->stats.tx_errors++;
- VDBG(dev, "tx err %d\n", req->status);
- /* FALLTHROUGH */
- case -ECONNRESET: /* unlink */
- case -ESHUTDOWN: /* disconnect etc */
- break;
- case 0:
- dev->net->stats.tx_bytes += skb->len;
- }
- dev->net->stats.tx_packets++;
-
- spin_lock(&dev->req_lock);
- list_add(&req->list, &dev->tx_reqs);
- spin_unlock(&dev->req_lock);
- dev_kfree_skb_any(skb);
-
- atomic_dec(&dev->tx_qlen);
- if (netif_carrier_ok(dev->net))
- netif_wake_queue(dev->net);
-}
-
-static inline int is_promisc(u16 cdc_filter)
-{
- return cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
-}
-
-static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
- struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- int length = 0;
- int retval;
- struct usb_request *req = NULL;
- unsigned long flags;
- struct usb_ep *in;
- u16 cdc_filter;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb) {
- in = dev->port_usb->in_ep;
- cdc_filter = dev->port_usb->cdc_filter;
- } else {
- in = NULL;
- cdc_filter = 0;
- }
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (skb && !in) {
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
- }
-
- /* apply outgoing CDC or RNDIS filters */
- if (skb && !is_promisc(cdc_filter)) {
- u8 *dest = skb->data;
-
- if (is_multicast_ether_addr(dest)) {
- u16 type;
-
- /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
- * SET_ETHERNET_MULTICAST_FILTERS requests
- */
- if (is_broadcast_ether_addr(dest))
- type = USB_CDC_PACKET_TYPE_BROADCAST;
- else
- type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
- if (!(cdc_filter & type)) {
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
- }
- }
- /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
- }
-
- spin_lock_irqsave(&dev->req_lock, flags);
- /*
- * this freelist can be empty if an interrupt triggered disconnect()
- * and reconfigured the gadget (shutting down this queue) after the
- * network stack decided to xmit but before we got the spinlock.
- */
- if (list_empty(&dev->tx_reqs)) {
- spin_unlock_irqrestore(&dev->req_lock, flags);
- return NETDEV_TX_BUSY;
- }
-
- req = container_of(dev->tx_reqs.next, struct usb_request, list);
- list_del(&req->list);
-
- /* temporarily stop TX queue when the freelist empties */
- if (list_empty(&dev->tx_reqs))
- netif_stop_queue(net);
- spin_unlock_irqrestore(&dev->req_lock, flags);
-
- /* no buffer copies needed, unless the network stack did it
- * or the hardware can't use skb buffers.
- * or there's not enough space for extra headers we need
- */
- if (dev->wrap) {
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb)
- skb = dev->wrap(dev->port_usb, skb);
- spin_unlock_irqrestore(&dev->lock, flags);
- if (!skb) {
- /* Multi frame CDC protocols may store the frame for
- * later which is not a dropped frame.
- */
- if (dev->port_usb->supports_multi_frame)
- goto multiframe;
- goto drop;
- }
- }
-
- length = skb->len;
- req->buf = skb->data;
- req->context = skb;
- req->complete = tx_complete;
-
- /* NCM requires no zlp if transfer is dwNtbInMaxSize */
- if (dev->port_usb->is_fixed &&
- length == dev->port_usb->fixed_in_len &&
- (length % in->maxpacket) == 0)
- req->zero = 0;
- else
- req->zero = 1;
-
- /* use zlp framing on tx for strict CDC-Ether conformance,
- * though any robust network rx path ignores extra padding.
- * and some hardware doesn't like to write zlps.
- */
- if (req->zero && !dev->zlp && (length % in->maxpacket) == 0)
- length++;
-
- req->length = length;
-
- /* throttle high/super speed IRQ rate back slightly */
- if (gadget_is_dualspeed(dev->gadget))
- req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH ||
- dev->gadget->speed == USB_SPEED_SUPER)
- ? ((atomic_read(&dev->tx_qlen) % dev->qmult) != 0)
- : 0;
-
- retval = usb_ep_queue(in, req, GFP_ATOMIC);
- switch (retval) {
- default:
- DBG(dev, "tx queue err %d\n", retval);
- break;
- case 0:
- net->trans_start = jiffies;
- atomic_inc(&dev->tx_qlen);
- }
-
- if (retval) {
- dev_kfree_skb_any(skb);
-drop:
- dev->net->stats.tx_dropped++;
-multiframe:
- spin_lock_irqsave(&dev->req_lock, flags);
- if (list_empty(&dev->tx_reqs))
- netif_start_queue(net);
- list_add(&req->list, &dev->tx_reqs);
- spin_unlock_irqrestore(&dev->req_lock, flags);
- }
- return NETDEV_TX_OK;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
-{
- DBG(dev, "%s\n", __func__);
-
- /* fill the rx queue */
- rx_fill(dev, gfp_flags);
-
- /* and open the tx floodgates */
- atomic_set(&dev->tx_qlen, 0);
- netif_wake_queue(dev->net);
-}
-
-static int eth_open(struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- struct gether *link;
-
- DBG(dev, "%s\n", __func__);
- if (netif_carrier_ok(dev->net))
- eth_start(dev, GFP_KERNEL);
-
- spin_lock_irq(&dev->lock);
- link = dev->port_usb;
- if (link && link->open)
- link->open(link);
- spin_unlock_irq(&dev->lock);
-
- return 0;
-}
-
-static int eth_stop(struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- unsigned long flags;
-
- VDBG(dev, "%s\n", __func__);
- netif_stop_queue(net);
-
- DBG(dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
- dev->net->stats.rx_packets, dev->net->stats.tx_packets,
- dev->net->stats.rx_errors, dev->net->stats.tx_errors
- );
-
- /* ensure there are no more active requests */
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb) {
- struct gether *link = dev->port_usb;
- const struct usb_endpoint_descriptor *in;
- const struct usb_endpoint_descriptor *out;
-
- if (link->close)
- link->close(link);
-
- /* NOTE: we have no abort-queue primitive we could use
- * to cancel all pending I/O. Instead, we disable then
- * reenable the endpoints ... this idiom may leave toggle
- * wrong, but that's a self-correcting error.
- *
- * REVISIT: we *COULD* just let the transfers complete at
- * their own pace; the network stack can handle old packets.
- * For the moment we leave this here, since it works.
- */
- in = link->in_ep->desc;
- out = link->out_ep->desc;
- usb_ep_disable(link->in_ep);
- usb_ep_disable(link->out_ep);
- if (netif_carrier_ok(net)) {
- DBG(dev, "host still using in/out endpoints\n");
- link->in_ep->desc = in;
- link->out_ep->desc = out;
- usb_ep_enable(link->in_ep);
- usb_ep_enable(link->out_ep);
- }
- }
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int get_ether_addr(const char *str, u8 *dev_addr)
-{
- if (str) {
- unsigned i;
-
- for (i = 0; i < 6; i++) {
- unsigned char num;
-
- if ((*str == '.') || (*str == ':'))
- str++;
- num = hex_to_bin(*str++) << 4;
- num |= hex_to_bin(*str++);
- dev_addr [i] = num;
- }
- if (is_valid_ether_addr(dev_addr))
- return 0;
- }
- eth_random_addr(dev_addr);
- return 1;
-}
-
-static int get_ether_addr_str(u8 dev_addr[ETH_ALEN], char *str, int len)
-{
- if (len < 18)
- return -EINVAL;
-
- snprintf(str, len, "%02x:%02x:%02x:%02x:%02x:%02x",
- dev_addr[0], dev_addr[1], dev_addr[2],
- dev_addr[3], dev_addr[4], dev_addr[5]);
- return 18;
-}
-
-static const struct net_device_ops eth_netdev_ops = {
- .ndo_open = eth_open,
- .ndo_stop = eth_stop,
- .ndo_start_xmit = eth_start_xmit,
- .ndo_change_mtu = ueth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static struct device_type gadget_type = {
- .name = "gadget",
-};
-
-/**
- * gether_setup_name - initialize one ethernet-over-usb link
- * @g: gadget to associated with these links
- * @ethaddr: NULL, or a buffer in which the ethernet address of the
- * host side of the link is recorded
- * @netname: name for network device (for example, "usb")
- * Context: may sleep
- *
- * This sets up the single network link that may be exported by a
- * gadget driver using this framework. The link layer addresses are
- * set up using module parameters.
- *
- * Returns an eth_dev pointer on success, or an ERR_PTR on failure.
- */
-struct eth_dev *gether_setup_name(struct usb_gadget *g,
- const char *dev_addr, const char *host_addr,
- u8 ethaddr[ETH_ALEN], unsigned qmult, const char *netname)
-{
- struct eth_dev *dev;
- struct net_device *net;
- int status;
-
- net = alloc_etherdev(sizeof *dev);
- if (!net)
- return ERR_PTR(-ENOMEM);
-
- dev = netdev_priv(net);
- spin_lock_init(&dev->lock);
- spin_lock_init(&dev->req_lock);
- INIT_WORK(&dev->work, eth_work);
- INIT_LIST_HEAD(&dev->tx_reqs);
- INIT_LIST_HEAD(&dev->rx_reqs);
-
- skb_queue_head_init(&dev->rx_frames);
-
- /* network device setup */
- dev->net = net;
- dev->qmult = qmult;
- snprintf(net->name, sizeof(net->name), "%s%%d", netname);
-
- if (get_ether_addr(dev_addr, net->dev_addr))
- dev_warn(&g->dev,
- "using random %s ethernet address\n", "self");
- if (get_ether_addr(host_addr, dev->host_mac))
- dev_warn(&g->dev,
- "using random %s ethernet address\n", "host");
-
- if (ethaddr)
- memcpy(ethaddr, dev->host_mac, ETH_ALEN);
-
- net->netdev_ops = ð_netdev_ops;
-
- net->ethtool_ops = &ops;
-
- dev->gadget = g;
- SET_NETDEV_DEV(net, &g->dev);
- SET_NETDEV_DEVTYPE(net, &gadget_type);
-
- status = register_netdev(net);
- if (status < 0) {
- dev_dbg(&g->dev, "register_netdev failed, %d\n", status);
- free_netdev(net);
- dev = ERR_PTR(status);
- } else {
- INFO(dev, "MAC %pM\n", net->dev_addr);
- INFO(dev, "HOST MAC %pM\n", dev->host_mac);
-
- /*
- * two kinds of host-initiated state changes:
- * - iff DATA transfer is active, carrier is "on"
- * - tx queueing enabled if open *and* carrier is "on"
- */
- netif_carrier_off(net);
- }
-
- return dev;
-}
-EXPORT_SYMBOL_GPL(gether_setup_name);
-
-struct net_device *gether_setup_name_default(const char *netname)
-{
- struct net_device *net;
- struct eth_dev *dev;
-
- net = alloc_etherdev(sizeof(*dev));
- if (!net)
- return ERR_PTR(-ENOMEM);
-
- dev = netdev_priv(net);
- spin_lock_init(&dev->lock);
- spin_lock_init(&dev->req_lock);
- INIT_WORK(&dev->work, eth_work);
- INIT_LIST_HEAD(&dev->tx_reqs);
- INIT_LIST_HEAD(&dev->rx_reqs);
-
- skb_queue_head_init(&dev->rx_frames);
-
- /* network device setup */
- dev->net = net;
- dev->qmult = QMULT_DEFAULT;
- snprintf(net->name, sizeof(net->name), "%s%%d", netname);
-
- eth_random_addr(dev->dev_mac);
- pr_warn("using random %s ethernet address\n", "self");
- eth_random_addr(dev->host_mac);
- pr_warn("using random %s ethernet address\n", "host");
-
- net->netdev_ops = ð_netdev_ops;
-
- net->ethtool_ops = &ops;
- SET_NETDEV_DEVTYPE(net, &gadget_type);
-
- return net;
-}
-EXPORT_SYMBOL_GPL(gether_setup_name_default);
-
-int gether_register_netdev(struct net_device *net)
-{
- struct eth_dev *dev;
- struct usb_gadget *g;
- struct sockaddr sa;
- int status;
-
- if (!net->dev.parent)
- return -EINVAL;
- dev = netdev_priv(net);
- g = dev->gadget;
- status = register_netdev(net);
- if (status < 0) {
- dev_dbg(&g->dev, "register_netdev failed, %d\n", status);
- return status;
- } else {
- INFO(dev, "HOST MAC %pM\n", dev->host_mac);
-
- /* two kinds of host-initiated state changes:
- * - iff DATA transfer is active, carrier is "on"
- * - tx queueing enabled if open *and* carrier is "on"
- */
- netif_carrier_off(net);
- }
- sa.sa_family = net->type;
- memcpy(sa.sa_data, dev->dev_mac, ETH_ALEN);
- rtnl_lock();
- status = dev_set_mac_address(net, &sa);
- rtnl_unlock();
- if (status)
- pr_warn("cannot set self ethernet address: %d\n", status);
- else
- INFO(dev, "MAC %pM\n", dev->dev_mac);
-
- return status;
-}
-EXPORT_SYMBOL_GPL(gether_register_netdev);
-
-void gether_set_gadget(struct net_device *net, struct usb_gadget *g)
-{
- struct eth_dev *dev;
-
- dev = netdev_priv(net);
- dev->gadget = g;
- SET_NETDEV_DEV(net, &g->dev);
-}
-EXPORT_SYMBOL_GPL(gether_set_gadget);
-
-int gether_set_dev_addr(struct net_device *net, const char *dev_addr)
-{
- struct eth_dev *dev;
- u8 new_addr[ETH_ALEN];
-
- dev = netdev_priv(net);
- if (get_ether_addr(dev_addr, new_addr))
- return -EINVAL;
- memcpy(dev->dev_mac, new_addr, ETH_ALEN);
- return 0;
-}
-EXPORT_SYMBOL_GPL(gether_set_dev_addr);
-
-int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len)
-{
- struct eth_dev *dev;
-
- dev = netdev_priv(net);
- return get_ether_addr_str(dev->dev_mac, dev_addr, len);
-}
-EXPORT_SYMBOL_GPL(gether_get_dev_addr);
-
-int gether_set_host_addr(struct net_device *net, const char *host_addr)
-{
- struct eth_dev *dev;
- u8 new_addr[ETH_ALEN];
-
- dev = netdev_priv(net);
- if (get_ether_addr(host_addr, new_addr))
- return -EINVAL;
- memcpy(dev->host_mac, new_addr, ETH_ALEN);
- return 0;
-}
-EXPORT_SYMBOL_GPL(gether_set_host_addr);
-
-int gether_get_host_addr(struct net_device *net, char *host_addr, int len)
-{
- struct eth_dev *dev;
-
- dev = netdev_priv(net);
- return get_ether_addr_str(dev->host_mac, host_addr, len);
-}
-EXPORT_SYMBOL_GPL(gether_get_host_addr);
-
-int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len)
-{
- struct eth_dev *dev;
-
- if (len < 13)
- return -EINVAL;
-
- dev = netdev_priv(net);
- snprintf(host_addr, len, "%pm", dev->host_mac);
-
- return strlen(host_addr);
-}
-EXPORT_SYMBOL_GPL(gether_get_host_addr_cdc);
-
-void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN])
-{
- struct eth_dev *dev;
-
- dev = netdev_priv(net);
- memcpy(host_mac, dev->host_mac, ETH_ALEN);
-}
-EXPORT_SYMBOL_GPL(gether_get_host_addr_u8);
-
-void gether_set_qmult(struct net_device *net, unsigned qmult)
-{
- struct eth_dev *dev;
-
- dev = netdev_priv(net);
- dev->qmult = qmult;
-}
-EXPORT_SYMBOL_GPL(gether_set_qmult);
-
-unsigned gether_get_qmult(struct net_device *net)
-{
- struct eth_dev *dev;
-
- dev = netdev_priv(net);
- return dev->qmult;
-}
-EXPORT_SYMBOL_GPL(gether_get_qmult);
-
-int gether_get_ifname(struct net_device *net, char *name, int len)
-{
- rtnl_lock();
- strlcpy(name, netdev_name(net), len);
- rtnl_unlock();
- return strlen(name);
-}
-EXPORT_SYMBOL_GPL(gether_get_ifname);
-
-/**
- * gether_cleanup - remove Ethernet-over-USB device
- * Context: may sleep
- *
- * This is called to free all resources allocated by @gether_setup().
- */
-void gether_cleanup(struct eth_dev *dev)
-{
- if (!dev)
- return;
-
- unregister_netdev(dev->net);
- flush_work(&dev->work);
- free_netdev(dev->net);
-}
-EXPORT_SYMBOL_GPL(gether_cleanup);
-
-/**
- * gether_connect - notify network layer that USB link is active
- * @link: the USB link, set up with endpoints, descriptors matching
- * current device speed, and any framing wrapper(s) set up.
- * Context: irqs blocked
- *
- * This is called to activate endpoints and let the network layer know
- * the connection is active ("carrier detect"). It may cause the I/O
- * queues to open and start letting network packets flow, but will in
- * any case activate the endpoints so that they respond properly to the
- * USB host.
- *
- * Verify net_device pointer returned using IS_ERR(). If it doesn't
- * indicate some error code (negative errno), ep->driver_data values
- * have been overwritten.
- */
-struct net_device *gether_connect(struct gether *link)
-{
- struct eth_dev *dev = link->ioport;
- int result = 0;
-
- if (!dev)
- return ERR_PTR(-EINVAL);
-
- link->in_ep->driver_data = dev;
- result = usb_ep_enable(link->in_ep);
- if (result != 0) {
- DBG(dev, "enable %s --> %d\n",
- link->in_ep->name, result);
- goto fail0;
- }
-
- link->out_ep->driver_data = dev;
- result = usb_ep_enable(link->out_ep);
- if (result != 0) {
- DBG(dev, "enable %s --> %d\n",
- link->out_ep->name, result);
- goto fail1;
- }
-
- if (result == 0)
- result = alloc_requests(dev, link, qlen(dev->gadget,
- dev->qmult));
-
- if (result == 0) {
- dev->zlp = link->is_zlp_ok;
- DBG(dev, "qlen %d\n", qlen(dev->gadget, dev->qmult));
-
- dev->header_len = link->header_len;
- dev->unwrap = link->unwrap;
- dev->wrap = link->wrap;
-
- spin_lock(&dev->lock);
- dev->port_usb = link;
- if (netif_running(dev->net)) {
- if (link->open)
- link->open(link);
- } else {
- if (link->close)
- link->close(link);
- }
- spin_unlock(&dev->lock);
-
- netif_carrier_on(dev->net);
- if (netif_running(dev->net))
- eth_start(dev, GFP_ATOMIC);
-
- /* on error, disable any endpoints */
- } else {
- (void) usb_ep_disable(link->out_ep);
-fail1:
- (void) usb_ep_disable(link->in_ep);
- }
-fail0:
- /* caller is responsible for cleanup on error */
- if (result < 0)
- return ERR_PTR(result);
- return dev->net;
-}
-EXPORT_SYMBOL_GPL(gether_connect);
-
-/**
- * gether_disconnect - notify network layer that USB link is inactive
- * @link: the USB link, on which gether_connect() was called
- * Context: irqs blocked
- *
- * This is called to deactivate endpoints and let the network layer know
- * the connection went inactive ("no carrier").
- *
- * On return, the state is as if gether_connect() had never been called.
- * The endpoints are inactive, and accordingly without active USB I/O.
- * Pointers to endpoint descriptors and endpoint private data are nulled.
- */
-void gether_disconnect(struct gether *link)
-{
- struct eth_dev *dev = link->ioport;
- struct usb_request *req;
-
- WARN_ON(!dev);
- if (!dev)
- return;
-
- DBG(dev, "%s\n", __func__);
-
- netif_stop_queue(dev->net);
- netif_carrier_off(dev->net);
-
- /* disable endpoints, forcing (synchronous) completion
- * of all pending i/o. then free the request objects
- * and forget about the endpoints.
- */
- usb_ep_disable(link->in_ep);
- spin_lock(&dev->req_lock);
- while (!list_empty(&dev->tx_reqs)) {
- req = container_of(dev->tx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
-
- spin_unlock(&dev->req_lock);
- usb_ep_free_request(link->in_ep, req);
- spin_lock(&dev->req_lock);
- }
- spin_unlock(&dev->req_lock);
- link->in_ep->driver_data = NULL;
- link->in_ep->desc = NULL;
-
- usb_ep_disable(link->out_ep);
- spin_lock(&dev->req_lock);
- while (!list_empty(&dev->rx_reqs)) {
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
-
- spin_unlock(&dev->req_lock);
- usb_ep_free_request(link->out_ep, req);
- spin_lock(&dev->req_lock);
- }
- spin_unlock(&dev->req_lock);
- link->out_ep->driver_data = NULL;
- link->out_ep->desc = NULL;
-
- /* finish forgetting about this USB link episode */
- dev->header_len = 0;
- dev->unwrap = NULL;
- dev->wrap = NULL;
-
- spin_lock(&dev->lock);
- dev->port_usb = NULL;
- spin_unlock(&dev->lock);
-}
-EXPORT_SYMBOL_GPL(gether_disconnect);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Brownell");
+++ /dev/null
-/*
- * u_ether.h -- interface to USB gadget "ethernet link" utilities
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __U_ETHER_H
-#define __U_ETHER_H
-
-#include <linux/err.h>
-#include <linux/if_ether.h>
-#include <linux/usb/composite.h>
-#include <linux/usb/cdc.h>
-#include <linux/netdevice.h>
-
-#include "gadget_chips.h"
-
-#define QMULT_DEFAULT 5
-
-/*
- * dev_addr: initial value
- * changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx"
- * host_addr: this address is invisible to ifconfig
- */
-#define USB_ETHERNET_MODULE_PARAMETERS() \
- static unsigned qmult = QMULT_DEFAULT; \
- module_param(qmult, uint, S_IRUGO|S_IWUSR); \
- MODULE_PARM_DESC(qmult, "queue length multiplier at high/super speed");\
- \
- static char *dev_addr; \
- module_param(dev_addr, charp, S_IRUGO); \
- MODULE_PARM_DESC(dev_addr, "Device Ethernet Address"); \
- \
- static char *host_addr; \
- module_param(host_addr, charp, S_IRUGO); \
- MODULE_PARM_DESC(host_addr, "Host Ethernet Address")
-
-struct eth_dev;
-
-/*
- * This represents the USB side of an "ethernet" link, managed by a USB
- * function which provides control and (maybe) framing. Two functions
- * in different configurations could share the same ethernet link/netdev,
- * using different host interaction models.
- *
- * There is a current limitation that only one instance of this link may
- * be present in any given configuration. When that's a problem, network
- * layer facilities can be used to package multiple logical links on this
- * single "physical" one.
- */
-struct gether {
- struct usb_function func;
-
- /* updated by gether_{connect,disconnect} */
- struct eth_dev *ioport;
-
- /* endpoints handle full and/or high speeds */
- struct usb_ep *in_ep;
- struct usb_ep *out_ep;
-
- bool is_zlp_ok;
-
- u16 cdc_filter;
-
- /* hooks for added framing, as needed for RNDIS and EEM. */
- u32 header_len;
- /* NCM requires fixed size bundles */
- bool is_fixed;
- u32 fixed_out_len;
- u32 fixed_in_len;
- bool supports_multi_frame;
- struct sk_buff *(*wrap)(struct gether *port,
- struct sk_buff *skb);
- int (*unwrap)(struct gether *port,
- struct sk_buff *skb,
- struct sk_buff_head *list);
-
- /* called on network open/close */
- void (*open)(struct gether *);
- void (*close)(struct gether *);
-};
-
-#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
- |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
- |USB_CDC_PACKET_TYPE_PROMISCUOUS \
- |USB_CDC_PACKET_TYPE_DIRECTED)
-
-/* variant of gether_setup that allows customizing network device name */
-struct eth_dev *gether_setup_name(struct usb_gadget *g,
- const char *dev_addr, const char *host_addr,
- u8 ethaddr[ETH_ALEN], unsigned qmult, const char *netname);
-
-/* netdev setup/teardown as directed by the gadget driver */
-/* gether_setup - initialize one ethernet-over-usb link
- * @g: gadget to associated with these links
- * @ethaddr: NULL, or a buffer in which the ethernet address of the
- * host side of the link is recorded
- * Context: may sleep
- *
- * This sets up the single network link that may be exported by a
- * gadget driver using this framework. The link layer addresses are
- * set up using module parameters.
- *
- * Returns a eth_dev pointer on success, or an ERR_PTR on failure
- */
-static inline struct eth_dev *gether_setup(struct usb_gadget *g,
- const char *dev_addr, const char *host_addr,
- u8 ethaddr[ETH_ALEN], unsigned qmult)
-{
- return gether_setup_name(g, dev_addr, host_addr, ethaddr, qmult, "usb");
-}
-
-/*
- * variant of gether_setup_default that allows customizing
- * network device name
- */
-struct net_device *gether_setup_name_default(const char *netname);
-
-/*
- * gether_register_netdev - register the net device
- * @net: net device to register
- *
- * Registers the net device associated with this ethernet-over-usb link
- *
- */
-int gether_register_netdev(struct net_device *net);
-
-/* gether_setup_default - initialize one ethernet-over-usb link
- * Context: may sleep
- *
- * This sets up the single network link that may be exported by a
- * gadget driver using this framework. The link layer addresses
- * are set to random values.
- *
- * Returns negative errno, or zero on success
- */
-static inline struct net_device *gether_setup_default(void)
-{
- return gether_setup_name_default("usb");
-}
-
-/**
- * gether_set_gadget - initialize one ethernet-over-usb link with a gadget
- * @net: device representing this link
- * @g: the gadget to initialize with
- *
- * This associates one ethernet-over-usb link with a gadget.
- */
-void gether_set_gadget(struct net_device *net, struct usb_gadget *g);
-
-/**
- * gether_set_dev_addr - initialize an ethernet-over-usb link with eth address
- * @net: device representing this link
- * @dev_addr: eth address of this device
- *
- * This sets the device-side Ethernet address of this ethernet-over-usb link
- * if dev_addr is correct.
- * Returns negative errno if the new address is incorrect.
- */
-int gether_set_dev_addr(struct net_device *net, const char *dev_addr);
-
-/**
- * gether_get_dev_addr - get an ethernet-over-usb link eth address
- * @net: device representing this link
- * @dev_addr: place to store device's eth address
- * @len: length of the @dev_addr buffer
- *
- * This gets the device-side Ethernet address of this ethernet-over-usb link.
- * Returns zero on success, else negative errno.
- */
-int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len);
-
-/**
- * gether_set_host_addr - initialize an ethernet-over-usb link with host address
- * @net: device representing this link
- * @host_addr: eth address of the host
- *
- * This sets the host-side Ethernet address of this ethernet-over-usb link
- * if host_addr is correct.
- * Returns negative errno if the new address is incorrect.
- */
-int gether_set_host_addr(struct net_device *net, const char *host_addr);
-
-/**
- * gether_get_host_addr - get an ethernet-over-usb link host address
- * @net: device representing this link
- * @host_addr: place to store eth address of the host
- * @len: length of the @host_addr buffer
- *
- * This gets the host-side Ethernet address of this ethernet-over-usb link.
- * Returns zero on success, else negative errno.
- */
-int gether_get_host_addr(struct net_device *net, char *host_addr, int len);
-
-/**
- * gether_get_host_addr_cdc - get an ethernet-over-usb link host address
- * @net: device representing this link
- * @host_addr: place to store eth address of the host
- * @len: length of the @host_addr buffer
- *
- * This gets the CDC formatted host-side Ethernet address of this
- * ethernet-over-usb link.
- * Returns zero on success, else negative errno.
- */
-int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len);
-
-/**
- * gether_get_host_addr_u8 - get an ethernet-over-usb link host address
- * @net: device representing this link
- * @host_mac: place to store the eth address of the host
- *
- * This gets the binary formatted host-side Ethernet address of this
- * ethernet-over-usb link.
- */
-void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN]);
-
-/**
- * gether_set_qmult - initialize an ethernet-over-usb link with a multiplier
- * @net: device representing this link
- * @qmult: queue multiplier
- *
- * This sets the queue length multiplier of this ethernet-over-usb link.
- * For higher speeds use longer queues.
- */
-void gether_set_qmult(struct net_device *net, unsigned qmult);
-
-/**
- * gether_get_qmult - get an ethernet-over-usb link multiplier
- * @net: device representing this link
- *
- * This gets the queue length multiplier of this ethernet-over-usb link.
- */
-unsigned gether_get_qmult(struct net_device *net);
-
-/**
- * gether_get_ifname - get an ethernet-over-usb link interface name
- * @net: device representing this link
- * @name: place to store the interface name
- * @len: length of the @name buffer
- *
- * This gets the interface name of this ethernet-over-usb link.
- * Returns zero on success, else negative errno.
- */
-int gether_get_ifname(struct net_device *net, char *name, int len);
-
-void gether_cleanup(struct eth_dev *dev);
-
-/* connect/disconnect is handled by individual functions */
-struct net_device *gether_connect(struct gether *);
-void gether_disconnect(struct gether *);
-
-/* Some controllers can't support CDC Ethernet (ECM) ... */
-static inline bool can_support_ecm(struct usb_gadget *gadget)
-{
- if (!gadget_supports_altsettings(gadget))
- return false;
-
- /* Everything else is *presumably* fine ... but this is a bit
- * chancy, so be **CERTAIN** there are no hardware issues with
- * your controller. Add it above if it can't handle CDC.
- */
- return true;
-}
-
-#endif /* __U_ETHER_H */
+++ /dev/null
-/*
- * u_ether_configfs.h
- *
- * Utility definitions for configfs support in USB Ethernet functions
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __U_ETHER_CONFIGFS_H
-#define __U_ETHER_CONFIGFS_H
-
-#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \
- CONFIGFS_ATTR_STRUCT(f_##_f_##_opts); \
- CONFIGFS_ATTR_OPS(f_##_f_##_opts); \
- \
- static void _f_##_attr_release(struct config_item *item) \
- { \
- struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
- \
- usb_put_function_instance(&opts->func_inst); \
- } \
- \
- static struct configfs_item_operations _f_##_item_ops = { \
- .release = _f_##_attr_release, \
- .show_attribute = f_##_f_##_opts_attr_show, \
- .store_attribute = f_##_f_##_opts_attr_store, \
- }
-
-#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \
- static ssize_t _f_##_opts_dev_addr_show(struct f_##_f_##_opts *opts, \
- char *page) \
- { \
- int result; \
- \
- mutex_lock(&opts->lock); \
- result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
- } \
- \
- static ssize_t _f_##_opts_dev_addr_store(struct f_##_f_##_opts *opts, \
- const char *page, size_t len)\
- { \
- int ret; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- mutex_unlock(&opts->lock); \
- return -EBUSY; \
- } \
- \
- ret = gether_set_dev_addr(opts->net, page); \
- mutex_unlock(&opts->lock); \
- if (!ret) \
- ret = len; \
- return ret; \
- } \
- \
- static struct f_##_f_##_opts_attribute f_##_f_##_opts_dev_addr = \
- __CONFIGFS_ATTR(dev_addr, S_IRUGO | S_IWUSR, \
- _f_##_opts_dev_addr_show, \
- _f_##_opts_dev_addr_store)
-
-#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \
- static ssize_t _f_##_opts_host_addr_show(struct f_##_f_##_opts *opts, \
- char *page) \
- { \
- int result; \
- \
- mutex_lock(&opts->lock); \
- result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
- } \
- \
- static ssize_t _f_##_opts_host_addr_store(struct f_##_f_##_opts *opts, \
- const char *page, size_t len)\
- { \
- int ret; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- mutex_unlock(&opts->lock); \
- return -EBUSY; \
- } \
- \
- ret = gether_set_host_addr(opts->net, page); \
- mutex_unlock(&opts->lock); \
- if (!ret) \
- ret = len; \
- return ret; \
- } \
- \
- static struct f_##_f_##_opts_attribute f_##_f_##_opts_host_addr = \
- __CONFIGFS_ATTR(host_addr, S_IRUGO | S_IWUSR, \
- _f_##_opts_host_addr_show, \
- _f_##_opts_host_addr_store)
-
-#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \
- static ssize_t _f_##_opts_qmult_show(struct f_##_f_##_opts *opts, \
- char *page) \
- { \
- unsigned qmult; \
- \
- mutex_lock(&opts->lock); \
- qmult = gether_get_qmult(opts->net); \
- mutex_unlock(&opts->lock); \
- return sprintf(page, "%d", qmult); \
- } \
- \
- static ssize_t _f_##_opts_qmult_store(struct f_##_f_##_opts *opts, \
- const char *page, size_t len)\
- { \
- u8 val; \
- int ret; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto out; \
- } \
- \
- ret = kstrtou8(page, 0, &val); \
- if (ret) \
- goto out; \
- \
- gether_set_qmult(opts->net, val); \
- ret = len; \
-out: \
- mutex_unlock(&opts->lock); \
- return ret; \
- } \
- \
- static struct f_##_f_##_opts_attribute f_##_f_##_opts_qmult = \
- __CONFIGFS_ATTR(qmult, S_IRUGO | S_IWUSR, \
- _f_##_opts_qmult_show, \
- _f_##_opts_qmult_store)
-
-#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \
- static ssize_t _f_##_opts_ifname_show(struct f_##_f_##_opts *opts, \
- char *page) \
- { \
- int ret; \
- \
- mutex_lock(&opts->lock); \
- ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \
- mutex_unlock(&opts->lock); \
- \
- return ret; \
- } \
- \
- static struct f_##_f_##_opts_attribute f_##_f_##_opts_ifname = \
- __CONFIGFS_ATTR_RO(ifname, _f_##_opts_ifname_show)
-
-#endif /* __U_ETHER_CONFIGFS_H */
+++ /dev/null
-/*
- * u_fs.h
- *
- * Utility definitions for the FunctionFS
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef U_FFS_H
-#define U_FFS_H
-
-#include <linux/usb/composite.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-
-#ifdef VERBOSE_DEBUG
-#ifndef pr_vdebug
-# define pr_vdebug pr_debug
-#endif /* pr_vdebug */
-# define ffs_dump_mem(prefix, ptr, len) \
- print_hex_dump_bytes(pr_fmt(prefix ": "), DUMP_PREFIX_NONE, ptr, len)
-#else
-#ifndef pr_vdebug
-# define pr_vdebug(...) do { } while (0)
-#endif /* pr_vdebug */
-# define ffs_dump_mem(prefix, ptr, len) do { } while (0)
-#endif /* VERBOSE_DEBUG */
-
-#define ENTER() pr_vdebug("%s()\n", __func__)
-
-struct f_fs_opts;
-
-struct ffs_dev {
- const char *name;
- bool name_allocated;
- bool mounted;
- bool desc_ready;
- bool single;
- struct ffs_data *ffs_data;
- struct f_fs_opts *opts;
- struct list_head entry;
-
- int (*ffs_ready_callback)(struct ffs_data *ffs);
- void (*ffs_closed_callback)(struct ffs_data *ffs);
- void *(*ffs_acquire_dev_callback)(struct ffs_dev *dev);
- void (*ffs_release_dev_callback)(struct ffs_dev *dev);
-};
-
-extern struct mutex ffs_lock;
-
-static inline void ffs_dev_lock(void)
-{
- mutex_lock(&ffs_lock);
-}
-
-static inline void ffs_dev_unlock(void)
-{
- mutex_unlock(&ffs_lock);
-}
-
-int ffs_name_dev(struct ffs_dev *dev, const char *name);
-int ffs_single_dev(struct ffs_dev *dev);
-
-struct ffs_epfile;
-struct ffs_function;
-
-enum ffs_state {
- /*
- * Waiting for descriptors and strings.
- *
- * In this state no open(2), read(2) or write(2) on epfiles
- * may succeed (which should not be the problem as there
- * should be no such files opened in the first place).
- */
- FFS_READ_DESCRIPTORS,
- FFS_READ_STRINGS,
-
- /*
- * We've got descriptors and strings. We are or have called
- * functionfs_ready_callback(). functionfs_bind() may have
- * been called but we don't know.
- *
- * This is the only state in which operations on epfiles may
- * succeed.
- */
- FFS_ACTIVE,
-
- /*
- * All endpoints have been closed. This state is also set if
- * we encounter an unrecoverable error. The only
- * unrecoverable error is situation when after reading strings
- * from user space we fail to initialise epfiles or
- * functionfs_ready_callback() returns with error (<0).
- *
- * In this state no open(2), read(2) or write(2) (both on ep0
- * as well as epfile) may succeed (at this point epfiles are
- * unlinked and all closed so this is not a problem; ep0 is
- * also closed but ep0 file exists and so open(2) on ep0 must
- * fail).
- */
- FFS_CLOSING
-};
-
-enum ffs_setup_state {
- /* There is no setup request pending. */
- FFS_NO_SETUP,
- /*
- * User has read events and there was a setup request event
- * there. The next read/write on ep0 will handle the
- * request.
- */
- FFS_SETUP_PENDING,
- /*
- * There was event pending but before user space handled it
- * some other event was introduced which canceled existing
- * setup. If this state is set read/write on ep0 return
- * -EIDRM. This state is only set when adding event.
- */
- FFS_SETUP_CANCELLED
-};
-
-struct ffs_data {
- struct usb_gadget *gadget;
-
- /*
- * Protect access read/write operations, only one read/write
- * at a time. As a consequence protects ep0req and company.
- * While setup request is being processed (queued) this is
- * held.
- */
- struct mutex mutex;
-
- /*
- * Protect access to endpoint related structures (basically
- * usb_ep_queue(), usb_ep_dequeue(), etc. calls) except for
- * endpoint zero.
- */
- spinlock_t eps_lock;
-
- /*
- * XXX REVISIT do we need our own request? Since we are not
- * handling setup requests immediately user space may be so
- * slow that another setup will be sent to the gadget but this
- * time not to us but another function and then there could be
- * a race. Is that the case? Or maybe we can use cdev->req
- * after all, maybe we just need some spinlock for that?
- */
- struct usb_request *ep0req; /* P: mutex */
- struct completion ep0req_completion; /* P: mutex */
-
- /* reference counter */
- atomic_t ref;
- /* how many files are opened (EP0 and others) */
- atomic_t opened;
-
- /* EP0 state */
- enum ffs_state state;
-
- /*
- * Possible transitions:
- * + FFS_NO_SETUP -> FFS_SETUP_PENDING -- P: ev.waitq.lock
- * happens only in ep0 read which is P: mutex
- * + FFS_SETUP_PENDING -> FFS_NO_SETUP -- P: ev.waitq.lock
- * happens only in ep0 i/o which is P: mutex
- * + FFS_SETUP_PENDING -> FFS_SETUP_CANCELLED -- P: ev.waitq.lock
- * + FFS_SETUP_CANCELLED -> FFS_NO_SETUP -- cmpxchg
- *
- * This field should never be accessed directly and instead
- * ffs_setup_state_clear_cancelled function should be used.
- */
- enum ffs_setup_state setup_state;
-
- /* Events & such. */
- struct {
- u8 types[4];
- unsigned short count;
- /* XXX REVISIT need to update it in some places, or do we? */
- unsigned short can_stall;
- struct usb_ctrlrequest setup;
-
- wait_queue_head_t waitq;
- } ev; /* the whole structure, P: ev.waitq.lock */
-
- /* Flags */
- unsigned long flags;
-#define FFS_FL_CALL_CLOSED_CALLBACK 0
-#define FFS_FL_BOUND 1
-
- /* Active function */
- struct ffs_function *func;
-
- /*
- * Device name, write once when file system is mounted.
- * Intended for user to read if she wants.
- */
- const char *dev_name;
- /* Private data for our user (ie. gadget). Managed by user. */
- void *private_data;
-
- /* filled by __ffs_data_got_descs() */
- /*
- * raw_descs is what you kfree, real_descs points inside of raw_descs,
- * where full speed, high speed and super speed descriptors start.
- * real_descs_length is the length of all those descriptors.
- */
- const void *raw_descs_data;
- const void *raw_descs;
- unsigned raw_descs_length;
- unsigned fs_descs_count;
- unsigned hs_descs_count;
- unsigned ss_descs_count;
- unsigned ms_os_descs_count;
- unsigned ms_os_descs_ext_prop_count;
- unsigned ms_os_descs_ext_prop_name_len;
- unsigned ms_os_descs_ext_prop_data_len;
- void *ms_os_descs_ext_prop_avail;
- void *ms_os_descs_ext_prop_name_avail;
- void *ms_os_descs_ext_prop_data_avail;
-
- unsigned short strings_count;
- unsigned short interfaces_count;
- unsigned short eps_count;
- unsigned short _pad1;
-
- /* filled by __ffs_data_got_strings() */
- /* ids in stringtabs are set in functionfs_bind() */
- const void *raw_strings;
- struct usb_gadget_strings **stringtabs;
-
- /*
- * File system's super block, write once when file system is
- * mounted.
- */
- struct super_block *sb;
-
- /* File permissions, written once when fs is mounted */
- struct ffs_file_perms {
- umode_t mode;
- kuid_t uid;
- kgid_t gid;
- } file_perms;
-
- /*
- * The endpoint files, filled by ffs_epfiles_create(),
- * destroyed by ffs_epfiles_destroy().
- */
- struct ffs_epfile *epfiles;
-};
-
-
-struct f_fs_opts {
- struct usb_function_instance func_inst;
- struct ffs_dev *dev;
- unsigned refcnt;
- bool no_configfs;
-};
-
-static inline struct f_fs_opts *to_f_fs_opts(struct usb_function_instance *fi)
-{
- return container_of(fi, struct f_fs_opts, func_inst);
-}
-
-#endif /* U_FFS_H */
+++ /dev/null
-/*
- * u_gether.h
- *
- * Utility definitions for the subset function
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef U_GETHER_H
-#define U_GETHER_H
-
-#include <linux/usb/composite.h>
-
-struct f_gether_opts {
- struct usb_function_instance func_inst;
- struct net_device *net;
- bool bound;
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-#endif /* U_GETHER_H */
+++ /dev/null
-/*
- * u_ncm.h
- *
- * Utility definitions for the ncm function
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef U_NCM_H
-#define U_NCM_H
-
-#include <linux/usb/composite.h>
-
-struct f_ncm_opts {
- struct usb_function_instance func_inst;
- struct net_device *net;
- bool bound;
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-#endif /* U_NCM_H */
+++ /dev/null
-/*
- * u_phonet.h - interface to Phonet
- *
- * Copyright (C) 2007-2008 by Nokia Corporation
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-#ifndef __U_PHONET_H
-#define __U_PHONET_H
-
-#include <linux/usb/composite.h>
-#include <linux/usb/cdc.h>
-
-struct f_phonet_opts {
- struct usb_function_instance func_inst;
- bool bound;
- struct net_device *net;
-};
-
-struct net_device *gphonet_setup_default(void);
-void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g);
-int gphonet_register_netdev(struct net_device *net);
-int phonet_bind_config(struct usb_configuration *c, struct net_device *dev);
-void gphonet_cleanup(struct net_device *dev);
-
-#endif /* __U_PHONET_H */
+++ /dev/null
-/*
- * u_rndis.h
- *
- * Utility definitions for the subset function
- *
- * Copyright (c) 2013 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef U_RNDIS_H
-#define U_RNDIS_H
-
-#include <linux/usb/composite.h>
-
-struct f_rndis_opts {
- struct usb_function_instance func_inst;
- u32 vendor_id;
- const char *manufacturer;
- struct net_device *net;
- bool bound;
- bool borrowed_net;
-
- struct usb_os_desc rndis_os_desc;
- char rndis_ext_compat_id[16];
-
- /*
- * Read/write access to configfs attributes is handled by configfs.
- *
- * This is to protect the data from concurrent access by read/write
- * and create symlink/remove symlink.
- */
- struct mutex lock;
- int refcnt;
-};
-
-int rndis_init(void);
-void rndis_exit(void);
-void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net);
-
-#endif /* U_RNDIS_H */
+++ /dev/null
-/*
- * u_serial.c - utilities for USB gadget "serial port"/TTY support
- *
- * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
- * Copyright (C) 2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This code also borrows from usbserial.c, which is
- * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2000 Peter Berger (pberger@brimson.com)
- * Copyright (C) 2000 Al Borchers (alborchers@steinerpoint.com)
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include <linux/module.h>
-
-#include "u_serial.h"
-
-
-/*
- * This component encapsulates the TTY layer glue needed to provide basic
- * "serial port" functionality through the USB gadget stack. Each such
- * port is exposed through a /dev/ttyGS* node.
- *
- * After this module has been loaded, the individual TTY port can be requested
- * (gserial_alloc_line()) and it will stay available until they are removed
- * (gserial_free_line()). Each one may be connected to a USB function
- * (gserial_connect), or disconnected (with gserial_disconnect) when the USB
- * host issues a config change event. Data can only flow when the port is
- * connected to the host.
- *
- * A given TTY port can be made available in multiple configurations.
- * For example, each one might expose a ttyGS0 node which provides a
- * login application. In one case that might use CDC ACM interface 0,
- * while another configuration might use interface 3 for that. The
- * work to handle that (including descriptor management) is not part
- * of this component.
- *
- * Configurations may expose more than one TTY port. For example, if
- * ttyGS0 provides login service, then ttyGS1 might provide dialer access
- * for a telephone or fax link. And ttyGS2 might be something that just
- * needs a simple byte stream interface for some messaging protocol that
- * is managed in userspace ... OBEX, PTP, and MTP have been mentioned.
- */
-
-#define PREFIX "ttyGS"
-
-/*
- * gserial is the lifecycle interface, used by USB functions
- * gs_port is the I/O nexus, used by the tty driver
- * tty_struct links to the tty/filesystem framework
- *
- * gserial <---> gs_port ... links will be null when the USB link is
- * inactive; managed by gserial_{connect,disconnect}(). each gserial
- * instance can wrap its own USB control protocol.
- * gserial->ioport == usb_ep->driver_data ... gs_port
- * gs_port->port_usb ... gserial
- *
- * gs_port <---> tty_struct ... links will be null when the TTY file
- * isn't opened; managed by gs_open()/gs_close()
- * gserial->port_tty ... tty_struct
- * tty_struct->driver_data ... gserial
- */
-
-/* RX and TX queues can buffer QUEUE_SIZE packets before they hit the
- * next layer of buffering. For TX that's a circular buffer; for RX
- * consider it a NOP. A third layer is provided by the TTY code.
- */
-#define QUEUE_SIZE 16
-#define WRITE_BUF_SIZE 8192 /* TX only */
-
-/* circular buffer */
-struct gs_buf {
- unsigned buf_size;
- char *buf_buf;
- char *buf_get;
- char *buf_put;
-};
-
-/*
- * The port structure holds info for each port, one for each minor number
- * (and thus for each /dev/ node).
- */
-struct gs_port {
- struct tty_port port;
- spinlock_t port_lock; /* guard port_* access */
-
- struct gserial *port_usb;
-
- bool openclose; /* open/close in progress */
- u8 port_num;
-
- struct list_head read_pool;
- int read_started;
- int read_allocated;
- struct list_head read_queue;
- unsigned n_read;
- struct tasklet_struct push;
-
- struct list_head write_pool;
- int write_started;
- int write_allocated;
- struct gs_buf port_write_buf;
- wait_queue_head_t drain_wait; /* wait while writes drain */
-
- /* REVISIT this state ... */
- struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
-};
-
-static struct portmaster {
- struct mutex lock; /* protect open/close */
- struct gs_port *port;
-} ports[MAX_U_SERIAL_PORTS];
-
-#define GS_CLOSE_TIMEOUT 15 /* seconds */
-
-
-
-#ifdef VERBOSE_DEBUG
-#ifndef pr_vdebug
-#define pr_vdebug(fmt, arg...) \
- pr_debug(fmt, ##arg)
-#endif /* pr_vdebug */
-#else
-#ifndef pr_vdebug
-#define pr_vdebug(fmt, arg...) \
- ({ if (0) pr_debug(fmt, ##arg); })
-#endif /* pr_vdebug */
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-/* Circular Buffer */
-
-/*
- * gs_buf_alloc
- *
- * Allocate a circular buffer and all associated memory.
- */
-static int gs_buf_alloc(struct gs_buf *gb, unsigned size)
-{
- gb->buf_buf = kmalloc(size, GFP_KERNEL);
- if (gb->buf_buf == NULL)
- return -ENOMEM;
-
- gb->buf_size = size;
- gb->buf_put = gb->buf_buf;
- gb->buf_get = gb->buf_buf;
-
- return 0;
-}
-
-/*
- * gs_buf_free
- *
- * Free the buffer and all associated memory.
- */
-static void gs_buf_free(struct gs_buf *gb)
-{
- kfree(gb->buf_buf);
- gb->buf_buf = NULL;
-}
-
-/*
- * gs_buf_clear
- *
- * Clear out all data in the circular buffer.
- */
-static void gs_buf_clear(struct gs_buf *gb)
-{
- gb->buf_get = gb->buf_put;
- /* equivalent to a get of all data available */
-}
-
-/*
- * gs_buf_data_avail
- *
- * Return the number of bytes of data written into the circular
- * buffer.
- */
-static unsigned gs_buf_data_avail(struct gs_buf *gb)
-{
- return (gb->buf_size + gb->buf_put - gb->buf_get) % gb->buf_size;
-}
-
-/*
- * gs_buf_space_avail
- *
- * Return the number of bytes of space available in the circular
- * buffer.
- */
-static unsigned gs_buf_space_avail(struct gs_buf *gb)
-{
- return (gb->buf_size + gb->buf_get - gb->buf_put - 1) % gb->buf_size;
-}
-
-/*
- * gs_buf_put
- *
- * Copy data data from a user buffer and put it into the circular buffer.
- * Restrict to the amount of space available.
- *
- * Return the number of bytes copied.
- */
-static unsigned
-gs_buf_put(struct gs_buf *gb, const char *buf, unsigned count)
-{
- unsigned len;
-
- len = gs_buf_space_avail(gb);
- if (count > len)
- count = len;
-
- if (count == 0)
- return 0;
-
- len = gb->buf_buf + gb->buf_size - gb->buf_put;
- if (count > len) {
- memcpy(gb->buf_put, buf, len);
- memcpy(gb->buf_buf, buf+len, count - len);
- gb->buf_put = gb->buf_buf + count - len;
- } else {
- memcpy(gb->buf_put, buf, count);
- if (count < len)
- gb->buf_put += count;
- else /* count == len */
- gb->buf_put = gb->buf_buf;
- }
-
- return count;
-}
-
-/*
- * gs_buf_get
- *
- * Get data from the circular buffer and copy to the given buffer.
- * Restrict to the amount of data available.
- *
- * Return the number of bytes copied.
- */
-static unsigned
-gs_buf_get(struct gs_buf *gb, char *buf, unsigned count)
-{
- unsigned len;
-
- len = gs_buf_data_avail(gb);
- if (count > len)
- count = len;
-
- if (count == 0)
- return 0;
-
- len = gb->buf_buf + gb->buf_size - gb->buf_get;
- if (count > len) {
- memcpy(buf, gb->buf_get, len);
- memcpy(buf+len, gb->buf_buf, count - len);
- gb->buf_get = gb->buf_buf + count - len;
- } else {
- memcpy(buf, gb->buf_get, count);
- if (count < len)
- gb->buf_get += count;
- else /* count == len */
- gb->buf_get = gb->buf_buf;
- }
-
- return count;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* I/O glue between TTY (upper) and USB function (lower) driver layers */
-
-/*
- * gs_alloc_req
- *
- * Allocate a usb_request and its buffer. Returns a pointer to the
- * usb_request or NULL if there is an error.
- */
-struct usb_request *
-gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t kmalloc_flags)
-{
- struct usb_request *req;
-
- req = usb_ep_alloc_request(ep, kmalloc_flags);
-
- if (req != NULL) {
- req->length = len;
- req->buf = kmalloc(len, kmalloc_flags);
- if (req->buf == NULL) {
- usb_ep_free_request(ep, req);
- return NULL;
- }
- }
-
- return req;
-}
-EXPORT_SYMBOL_GPL(gs_alloc_req);
-
-/*
- * gs_free_req
- *
- * Free a usb_request and its buffer.
- */
-void gs_free_req(struct usb_ep *ep, struct usb_request *req)
-{
- kfree(req->buf);
- usb_ep_free_request(ep, req);
-}
-EXPORT_SYMBOL_GPL(gs_free_req);
-
-/*
- * gs_send_packet
- *
- * If there is data to send, a packet is built in the given
- * buffer and the size is returned. If there is no data to
- * send, 0 is returned.
- *
- * Called with port_lock held.
- */
-static unsigned
-gs_send_packet(struct gs_port *port, char *packet, unsigned size)
-{
- unsigned len;
-
- len = gs_buf_data_avail(&port->port_write_buf);
- if (len < size)
- size = len;
- if (size != 0)
- size = gs_buf_get(&port->port_write_buf, packet, size);
- return size;
-}
-
-/*
- * gs_start_tx
- *
- * This function finds available write requests, calls
- * gs_send_packet to fill these packets with data, and
- * continues until either there are no more write requests
- * available or no more data to send. This function is
- * run whenever data arrives or write requests are available.
- *
- * Context: caller owns port_lock; port_usb is non-null.
- */
-static int gs_start_tx(struct gs_port *port)
-/*
-__releases(&port->port_lock)
-__acquires(&port->port_lock)
-*/
-{
- struct list_head *pool = &port->write_pool;
- struct usb_ep *in = port->port_usb->in;
- int status = 0;
- bool do_tty_wake = false;
-
- while (!list_empty(pool)) {
- struct usb_request *req;
- int len;
-
- if (port->write_started >= QUEUE_SIZE)
- break;
-
- req = list_entry(pool->next, struct usb_request, list);
- len = gs_send_packet(port, req->buf, in->maxpacket);
- if (len == 0) {
- wake_up_interruptible(&port->drain_wait);
- break;
- }
- do_tty_wake = true;
-
- req->length = len;
- list_del(&req->list);
- req->zero = (gs_buf_data_avail(&port->port_write_buf) == 0);
-
- pr_vdebug(PREFIX "%d: tx len=%d, 0x%02x 0x%02x 0x%02x ...\n",
- port->port_num, len, *((u8 *)req->buf),
- *((u8 *)req->buf+1), *((u8 *)req->buf+2));
-
- /* Drop lock while we call out of driver; completions
- * could be issued while we do so. Disconnection may
- * happen too; maybe immediately before we queue this!
- *
- * NOTE that we may keep sending data for a while after
- * the TTY closed (dev->ioport->port_tty is NULL).
- */
- spin_unlock(&port->port_lock);
- status = usb_ep_queue(in, req, GFP_ATOMIC);
- spin_lock(&port->port_lock);
-
- if (status) {
- pr_debug("%s: %s %s err %d\n",
- __func__, "queue", in->name, status);
- list_add(&req->list, pool);
- break;
- }
-
- port->write_started++;
-
- /* abort immediately after disconnect */
- if (!port->port_usb)
- break;
- }
-
- if (do_tty_wake && port->port.tty)
- tty_wakeup(port->port.tty);
- return status;
-}
-
-/*
- * Context: caller owns port_lock, and port_usb is set
- */
-static unsigned gs_start_rx(struct gs_port *port)
-/*
-__releases(&port->port_lock)
-__acquires(&port->port_lock)
-*/
-{
- struct list_head *pool = &port->read_pool;
- struct usb_ep *out = port->port_usb->out;
-
- while (!list_empty(pool)) {
- struct usb_request *req;
- int status;
- struct tty_struct *tty;
-
- /* no more rx if closed */
- tty = port->port.tty;
- if (!tty)
- break;
-
- if (port->read_started >= QUEUE_SIZE)
- break;
-
- req = list_entry(pool->next, struct usb_request, list);
- list_del(&req->list);
- req->length = out->maxpacket;
-
- /* drop lock while we call out; the controller driver
- * may need to call us back (e.g. for disconnect)
- */
- spin_unlock(&port->port_lock);
- status = usb_ep_queue(out, req, GFP_ATOMIC);
- spin_lock(&port->port_lock);
-
- if (status) {
- pr_debug("%s: %s %s err %d\n",
- __func__, "queue", out->name, status);
- list_add(&req->list, pool);
- break;
- }
- port->read_started++;
-
- /* abort immediately after disconnect */
- if (!port->port_usb)
- break;
- }
- return port->read_started;
-}
-
-/*
- * RX tasklet takes data out of the RX queue and hands it up to the TTY
- * layer until it refuses to take any more data (or is throttled back).
- * Then it issues reads for any further data.
- *
- * If the RX queue becomes full enough that no usb_request is queued,
- * the OUT endpoint may begin NAKing as soon as its FIFO fills up.
- * So QUEUE_SIZE packets plus however many the FIFO holds (usually two)
- * can be buffered before the TTY layer's buffers (currently 64 KB).
- */
-static void gs_rx_push(unsigned long _port)
-{
- struct gs_port *port = (void *)_port;
- struct tty_struct *tty;
- struct list_head *queue = &port->read_queue;
- bool disconnect = false;
- bool do_push = false;
-
- /* hand any queued data to the tty */
- spin_lock_irq(&port->port_lock);
- tty = port->port.tty;
- while (!list_empty(queue)) {
- struct usb_request *req;
-
- req = list_first_entry(queue, struct usb_request, list);
-
- /* leave data queued if tty was rx throttled */
- if (tty && test_bit(TTY_THROTTLED, &tty->flags))
- break;
-
- switch (req->status) {
- case -ESHUTDOWN:
- disconnect = true;
- pr_vdebug(PREFIX "%d: shutdown\n", port->port_num);
- break;
-
- default:
- /* presumably a transient fault */
- pr_warning(PREFIX "%d: unexpected RX status %d\n",
- port->port_num, req->status);
- /* FALLTHROUGH */
- case 0:
- /* normal completion */
- break;
- }
-
- /* push data to (open) tty */
- if (req->actual) {
- char *packet = req->buf;
- unsigned size = req->actual;
- unsigned n;
- int count;
-
- /* we may have pushed part of this packet already... */
- n = port->n_read;
- if (n) {
- packet += n;
- size -= n;
- }
-
- count = tty_insert_flip_string(&port->port, packet,
- size);
- if (count)
- do_push = true;
- if (count != size) {
- /* stop pushing; TTY layer can't handle more */
- port->n_read += count;
- pr_vdebug(PREFIX "%d: rx block %d/%d\n",
- port->port_num,
- count, req->actual);
- break;
- }
- port->n_read = 0;
- }
-
- list_move(&req->list, &port->read_pool);
- port->read_started--;
- }
-
- /* Push from tty to ldisc; this is handled by a workqueue,
- * so we won't get callbacks and can hold port_lock
- */
- if (do_push)
- tty_flip_buffer_push(&port->port);
-
-
- /* We want our data queue to become empty ASAP, keeping data
- * in the tty and ldisc (not here). If we couldn't push any
- * this time around, there may be trouble unless there's an
- * implicit tty_unthrottle() call on its way...
- *
- * REVISIT we should probably add a timer to keep the tasklet
- * from starving ... but it's not clear that case ever happens.
- */
- if (!list_empty(queue) && tty) {
- if (!test_bit(TTY_THROTTLED, &tty->flags)) {
- if (do_push)
- tasklet_schedule(&port->push);
- else
- pr_warning(PREFIX "%d: RX not scheduled?\n",
- port->port_num);
- }
- }
-
- /* If we're still connected, refill the USB RX queue. */
- if (!disconnect && port->port_usb)
- gs_start_rx(port);
-
- spin_unlock_irq(&port->port_lock);
-}
-
-static void gs_read_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct gs_port *port = ep->driver_data;
-
- /* Queue all received data until the tty layer is ready for it. */
- spin_lock(&port->port_lock);
- list_add_tail(&req->list, &port->read_queue);
- tasklet_schedule(&port->push);
- spin_unlock(&port->port_lock);
-}
-
-static void gs_write_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct gs_port *port = ep->driver_data;
-
- spin_lock(&port->port_lock);
- list_add(&req->list, &port->write_pool);
- port->write_started--;
-
- switch (req->status) {
- default:
- /* presumably a transient fault */
- pr_warning("%s: unexpected %s status %d\n",
- __func__, ep->name, req->status);
- /* FALL THROUGH */
- case 0:
- /* normal completion */
- gs_start_tx(port);
- break;
-
- case -ESHUTDOWN:
- /* disconnect */
- pr_vdebug("%s: %s shutdown\n", __func__, ep->name);
- break;
- }
-
- spin_unlock(&port->port_lock);
-}
-
-static void gs_free_requests(struct usb_ep *ep, struct list_head *head,
- int *allocated)
-{
- struct usb_request *req;
-
- while (!list_empty(head)) {
- req = list_entry(head->next, struct usb_request, list);
- list_del(&req->list);
- gs_free_req(ep, req);
- if (allocated)
- (*allocated)--;
- }
-}
-
-static int gs_alloc_requests(struct usb_ep *ep, struct list_head *head,
- void (*fn)(struct usb_ep *, struct usb_request *),
- int *allocated)
-{
- int i;
- struct usb_request *req;
- int n = allocated ? QUEUE_SIZE - *allocated : QUEUE_SIZE;
-
- /* Pre-allocate up to QUEUE_SIZE transfers, but if we can't
- * do quite that many this time, don't fail ... we just won't
- * be as speedy as we might otherwise be.
- */
- for (i = 0; i < n; i++) {
- req = gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC);
- if (!req)
- return list_empty(head) ? -ENOMEM : 0;
- req->complete = fn;
- list_add_tail(&req->list, head);
- if (allocated)
- (*allocated)++;
- }
- return 0;
-}
-
-/**
- * gs_start_io - start USB I/O streams
- * @dev: encapsulates endpoints to use
- * Context: holding port_lock; port_tty and port_usb are non-null
- *
- * We only start I/O when something is connected to both sides of
- * this port. If nothing is listening on the host side, we may
- * be pointlessly filling up our TX buffers and FIFO.
- */
-static int gs_start_io(struct gs_port *port)
-{
- struct list_head *head = &port->read_pool;
- struct usb_ep *ep = port->port_usb->out;
- int status;
- unsigned started;
-
- /* Allocate RX and TX I/O buffers. We can't easily do this much
- * earlier (with GFP_KERNEL) because the requests are coupled to
- * endpoints, as are the packet sizes we'll be using. Different
- * configurations may use different endpoints with a given port;
- * and high speed vs full speed changes packet sizes too.
- */
- status = gs_alloc_requests(ep, head, gs_read_complete,
- &port->read_allocated);
- if (status)
- return status;
-
- status = gs_alloc_requests(port->port_usb->in, &port->write_pool,
- gs_write_complete, &port->write_allocated);
- if (status) {
- gs_free_requests(ep, head, &port->read_allocated);
- return status;
- }
-
- /* queue read requests */
- port->n_read = 0;
- started = gs_start_rx(port);
-
- /* unblock any pending writes into our circular buffer */
- if (started) {
- tty_wakeup(port->port.tty);
- } else {
- gs_free_requests(ep, head, &port->read_allocated);
- gs_free_requests(port->port_usb->in, &port->write_pool,
- &port->write_allocated);
- status = -EIO;
- }
-
- return status;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* TTY Driver */
-
-/*
- * gs_open sets up the link between a gs_port and its associated TTY.
- * That link is broken *only* by TTY close(), and all driver methods
- * know that.
- */
-static int gs_open(struct tty_struct *tty, struct file *file)
-{
- int port_num = tty->index;
- struct gs_port *port;
- int status;
-
- do {
- mutex_lock(&ports[port_num].lock);
- port = ports[port_num].port;
- if (!port)
- status = -ENODEV;
- else {
- spin_lock_irq(&port->port_lock);
-
- /* already open? Great. */
- if (port->port.count) {
- status = 0;
- port->port.count++;
-
- /* currently opening/closing? wait ... */
- } else if (port->openclose) {
- status = -EBUSY;
-
- /* ... else we do the work */
- } else {
- status = -EAGAIN;
- port->openclose = true;
- }
- spin_unlock_irq(&port->port_lock);
- }
- mutex_unlock(&ports[port_num].lock);
-
- switch (status) {
- default:
- /* fully handled */
- return status;
- case -EAGAIN:
- /* must do the work */
- break;
- case -EBUSY:
- /* wait for EAGAIN task to finish */
- msleep(1);
- /* REVISIT could have a waitchannel here, if
- * concurrent open performance is important
- */
- break;
- }
- } while (status != -EAGAIN);
-
- /* Do the "real open" */
- spin_lock_irq(&port->port_lock);
-
- /* allocate circular buffer on first open */
- if (port->port_write_buf.buf_buf == NULL) {
-
- spin_unlock_irq(&port->port_lock);
- status = gs_buf_alloc(&port->port_write_buf, WRITE_BUF_SIZE);
- spin_lock_irq(&port->port_lock);
-
- if (status) {
- pr_debug("gs_open: ttyGS%d (%p,%p) no buffer\n",
- port->port_num, tty, file);
- port->openclose = false;
- goto exit_unlock_port;
- }
- }
-
- /* REVISIT if REMOVED (ports[].port NULL), abort the open
- * to let rmmod work faster (but this way isn't wrong).
- */
-
- /* REVISIT maybe wait for "carrier detect" */
-
- tty->driver_data = port;
- port->port.tty = tty;
-
- port->port.count = 1;
- port->openclose = false;
-
- /* if connected, start the I/O stream */
- if (port->port_usb) {
- struct gserial *gser = port->port_usb;
-
- pr_debug("gs_open: start ttyGS%d\n", port->port_num);
- gs_start_io(port);
-
- if (gser->connect)
- gser->connect(gser);
- }
-
- pr_debug("gs_open: ttyGS%d (%p,%p)\n", port->port_num, tty, file);
-
- status = 0;
-
-exit_unlock_port:
- spin_unlock_irq(&port->port_lock);
- return status;
-}
-
-static int gs_writes_finished(struct gs_port *p)
-{
- int cond;
-
- /* return true on disconnect or empty buffer */
- spin_lock_irq(&p->port_lock);
- cond = (p->port_usb == NULL) || !gs_buf_data_avail(&p->port_write_buf);
- spin_unlock_irq(&p->port_lock);
-
- return cond;
-}
-
-static void gs_close(struct tty_struct *tty, struct file *file)
-{
- struct gs_port *port = tty->driver_data;
- struct gserial *gser;
-
- spin_lock_irq(&port->port_lock);
-
- if (port->port.count != 1) {
- if (port->port.count == 0)
- WARN_ON(1);
- else
- --port->port.count;
- goto exit;
- }
-
- pr_debug("gs_close: ttyGS%d (%p,%p) ...\n", port->port_num, tty, file);
-
- /* mark port as closing but in use; we can drop port lock
- * and sleep if necessary
- */
- port->openclose = true;
- port->port.count = 0;
-
- gser = port->port_usb;
- if (gser && gser->disconnect)
- gser->disconnect(gser);
-
- /* wait for circular write buffer to drain, disconnect, or at
- * most GS_CLOSE_TIMEOUT seconds; then discard the rest
- */
- if (gs_buf_data_avail(&port->port_write_buf) > 0 && gser) {
- spin_unlock_irq(&port->port_lock);
- wait_event_interruptible_timeout(port->drain_wait,
- gs_writes_finished(port),
- GS_CLOSE_TIMEOUT * HZ);
- spin_lock_irq(&port->port_lock);
- gser = port->port_usb;
- }
-
- /* Iff we're disconnected, there can be no I/O in flight so it's
- * ok to free the circular buffer; else just scrub it. And don't
- * let the push tasklet fire again until we're re-opened.
- */
- if (gser == NULL)
- gs_buf_free(&port->port_write_buf);
- else
- gs_buf_clear(&port->port_write_buf);
-
- tty->driver_data = NULL;
- port->port.tty = NULL;
-
- port->openclose = false;
-
- pr_debug("gs_close: ttyGS%d (%p,%p) done!\n",
- port->port_num, tty, file);
-
- wake_up(&port->port.close_wait);
-exit:
- spin_unlock_irq(&port->port_lock);
-}
-
-static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int status;
-
- pr_vdebug("gs_write: ttyGS%d (%p) writing %d bytes\n",
- port->port_num, tty, count);
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (count)
- count = gs_buf_put(&port->port_write_buf, buf, count);
- /* treat count == 0 as flush_chars() */
- if (port->port_usb)
- status = gs_start_tx(port);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- return count;
-}
-
-static int gs_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int status;
-
- pr_vdebug("gs_put_char: (%d,%p) char=0x%x, called from %pf\n",
- port->port_num, tty, ch, __builtin_return_address(0));
-
- spin_lock_irqsave(&port->port_lock, flags);
- status = gs_buf_put(&port->port_write_buf, &ch, 1);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- return status;
-}
-
-static void gs_flush_chars(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
-
- pr_vdebug("gs_flush_chars: (%d,%p)\n", port->port_num, tty);
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port_usb)
- gs_start_tx(port);
- spin_unlock_irqrestore(&port->port_lock, flags);
-}
-
-static int gs_write_room(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int room = 0;
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port_usb)
- room = gs_buf_space_avail(&port->port_write_buf);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- pr_vdebug("gs_write_room: (%d,%p) room=%d\n",
- port->port_num, tty, room);
-
- return room;
-}
-
-static int gs_chars_in_buffer(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int chars = 0;
-
- spin_lock_irqsave(&port->port_lock, flags);
- chars = gs_buf_data_avail(&port->port_write_buf);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- pr_vdebug("gs_chars_in_buffer: (%d,%p) chars=%d\n",
- port->port_num, tty, chars);
-
- return chars;
-}
-
-/* undo side effects of setting TTY_THROTTLED */
-static void gs_unthrottle(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port_usb) {
- /* Kickstart read queue processing. We don't do xon/xoff,
- * rts/cts, or other handshaking with the host, but if the
- * read queue backs up enough we'll be NAKing OUT packets.
- */
- tasklet_schedule(&port->push);
- pr_vdebug(PREFIX "%d: unthrottle\n", port->port_num);
- }
- spin_unlock_irqrestore(&port->port_lock, flags);
-}
-
-static int gs_break_ctl(struct tty_struct *tty, int duration)
-{
- struct gs_port *port = tty->driver_data;
- int status = 0;
- struct gserial *gser;
-
- pr_vdebug("gs_break_ctl: ttyGS%d, send break (%d) \n",
- port->port_num, duration);
-
- spin_lock_irq(&port->port_lock);
- gser = port->port_usb;
- if (gser && gser->send_break)
- status = gser->send_break(gser, duration);
- spin_unlock_irq(&port->port_lock);
-
- return status;
-}
-
-static const struct tty_operations gs_tty_ops = {
- .open = gs_open,
- .close = gs_close,
- .write = gs_write,
- .put_char = gs_put_char,
- .flush_chars = gs_flush_chars,
- .write_room = gs_write_room,
- .chars_in_buffer = gs_chars_in_buffer,
- .unthrottle = gs_unthrottle,
- .break_ctl = gs_break_ctl,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static struct tty_driver *gs_tty_driver;
-
-static int
-gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding)
-{
- struct gs_port *port;
- int ret = 0;
-
- mutex_lock(&ports[port_num].lock);
- if (ports[port_num].port) {
- ret = -EBUSY;
- goto out;
- }
-
- port = kzalloc(sizeof(struct gs_port), GFP_KERNEL);
- if (port == NULL) {
- ret = -ENOMEM;
- goto out;
- }
-
- tty_port_init(&port->port);
- spin_lock_init(&port->port_lock);
- init_waitqueue_head(&port->drain_wait);
-
- tasklet_init(&port->push, gs_rx_push, (unsigned long) port);
-
- INIT_LIST_HEAD(&port->read_pool);
- INIT_LIST_HEAD(&port->read_queue);
- INIT_LIST_HEAD(&port->write_pool);
-
- port->port_num = port_num;
- port->port_line_coding = *coding;
-
- ports[port_num].port = port;
-out:
- mutex_unlock(&ports[port_num].lock);
- return ret;
-}
-
-static int gs_closed(struct gs_port *port)
-{
- int cond;
-
- spin_lock_irq(&port->port_lock);
- cond = (port->port.count == 0) && !port->openclose;
- spin_unlock_irq(&port->port_lock);
- return cond;
-}
-
-static void gserial_free_port(struct gs_port *port)
-{
- tasklet_kill(&port->push);
- /* wait for old opens to finish */
- wait_event(port->port.close_wait, gs_closed(port));
- WARN_ON(port->port_usb != NULL);
- tty_port_destroy(&port->port);
- kfree(port);
-}
-
-void gserial_free_line(unsigned char port_num)
-{
- struct gs_port *port;
-
- mutex_lock(&ports[port_num].lock);
- if (WARN_ON(!ports[port_num].port)) {
- mutex_unlock(&ports[port_num].lock);
- return;
- }
- port = ports[port_num].port;
- ports[port_num].port = NULL;
- mutex_unlock(&ports[port_num].lock);
-
- gserial_free_port(port);
- tty_unregister_device(gs_tty_driver, port_num);
-}
-EXPORT_SYMBOL_GPL(gserial_free_line);
-
-int gserial_alloc_line(unsigned char *line_num)
-{
- struct usb_cdc_line_coding coding;
- struct device *tty_dev;
- int ret;
- int port_num;
-
- coding.dwDTERate = cpu_to_le32(9600);
- coding.bCharFormat = 8;
- coding.bParityType = USB_CDC_NO_PARITY;
- coding.bDataBits = USB_CDC_1_STOP_BITS;
-
- for (port_num = 0; port_num < MAX_U_SERIAL_PORTS; port_num++) {
- ret = gs_port_alloc(port_num, &coding);
- if (ret == -EBUSY)
- continue;
- if (ret)
- return ret;
- break;
- }
- if (ret)
- return ret;
-
- /* ... and sysfs class devices, so mdev/udev make /dev/ttyGS* */
-
- tty_dev = tty_port_register_device(&ports[port_num].port->port,
- gs_tty_driver, port_num, NULL);
- if (IS_ERR(tty_dev)) {
- struct gs_port *port;
- pr_err("%s: failed to register tty for port %d, err %ld\n",
- __func__, port_num, PTR_ERR(tty_dev));
-
- ret = PTR_ERR(tty_dev);
- port = ports[port_num].port;
- ports[port_num].port = NULL;
- gserial_free_port(port);
- goto err;
- }
- *line_num = port_num;
-err:
- return ret;
-}
-EXPORT_SYMBOL_GPL(gserial_alloc_line);
-
-/**
- * gserial_connect - notify TTY I/O glue that USB link is active
- * @gser: the function, set up with endpoints and descriptors
- * @port_num: which port is active
- * Context: any (usually from irq)
- *
- * This is called activate endpoints and let the TTY layer know that
- * the connection is active ... not unlike "carrier detect". It won't
- * necessarily start I/O queues; unless the TTY is held open by any
- * task, there would be no point. However, the endpoints will be
- * activated so the USB host can perform I/O, subject to basic USB
- * hardware flow control.
- *
- * Caller needs to have set up the endpoints and USB function in @dev
- * before calling this, as well as the appropriate (speed-specific)
- * endpoint descriptors, and also have allocate @port_num by calling
- * @gserial_alloc_line().
- *
- * Returns negative errno or zero.
- * On success, ep->driver_data will be overwritten.
- */
-int gserial_connect(struct gserial *gser, u8 port_num)
-{
- struct gs_port *port;
- unsigned long flags;
- int status;
-
- if (port_num >= MAX_U_SERIAL_PORTS)
- return -ENXIO;
-
- port = ports[port_num].port;
- if (!port) {
- pr_err("serial line %d not allocated.\n", port_num);
- return -EINVAL;
- }
- if (port->port_usb) {
- pr_err("serial line %d is in use.\n", port_num);
- return -EBUSY;
- }
-
- /* activate the endpoints */
- status = usb_ep_enable(gser->in);
- if (status < 0)
- return status;
- gser->in->driver_data = port;
-
- status = usb_ep_enable(gser->out);
- if (status < 0)
- goto fail_out;
- gser->out->driver_data = port;
-
- /* then tell the tty glue that I/O can work */
- spin_lock_irqsave(&port->port_lock, flags);
- gser->ioport = port;
- port->port_usb = gser;
-
- /* REVISIT unclear how best to handle this state...
- * we don't really couple it with the Linux TTY.
- */
- gser->port_line_coding = port->port_line_coding;
-
- /* REVISIT if waiting on "carrier detect", signal. */
-
- /* if it's already open, start I/O ... and notify the serial
- * protocol about open/close status (connect/disconnect).
- */
- if (port->port.count) {
- pr_debug("gserial_connect: start ttyGS%d\n", port->port_num);
- gs_start_io(port);
- if (gser->connect)
- gser->connect(gser);
- } else {
- if (gser->disconnect)
- gser->disconnect(gser);
- }
-
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- return status;
-
-fail_out:
- usb_ep_disable(gser->in);
- gser->in->driver_data = NULL;
- return status;
-}
-EXPORT_SYMBOL_GPL(gserial_connect);
-/**
- * gserial_disconnect - notify TTY I/O glue that USB link is inactive
- * @gser: the function, on which gserial_connect() was called
- * Context: any (usually from irq)
- *
- * This is called to deactivate endpoints and let the TTY layer know
- * that the connection went inactive ... not unlike "hangup".
- *
- * On return, the state is as if gserial_connect() had never been called;
- * there is no active USB I/O on these endpoints.
- */
-void gserial_disconnect(struct gserial *gser)
-{
- struct gs_port *port = gser->ioport;
- unsigned long flags;
-
- if (!port)
- return;
-
- /* tell the TTY glue not to do I/O here any more */
- spin_lock_irqsave(&port->port_lock, flags);
-
- /* REVISIT as above: how best to track this? */
- port->port_line_coding = gser->port_line_coding;
-
- port->port_usb = NULL;
- gser->ioport = NULL;
- if (port->port.count > 0 || port->openclose) {
- wake_up_interruptible(&port->drain_wait);
- if (port->port.tty)
- tty_hangup(port->port.tty);
- }
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- /* disable endpoints, aborting down any active I/O */
- usb_ep_disable(gser->out);
- gser->out->driver_data = NULL;
-
- usb_ep_disable(gser->in);
- gser->in->driver_data = NULL;
-
- /* finally, free any unused/unusable I/O buffers */
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port.count == 0 && !port->openclose)
- gs_buf_free(&port->port_write_buf);
- gs_free_requests(gser->out, &port->read_pool, NULL);
- gs_free_requests(gser->out, &port->read_queue, NULL);
- gs_free_requests(gser->in, &port->write_pool, NULL);
-
- port->read_allocated = port->read_started =
- port->write_allocated = port->write_started = 0;
-
- spin_unlock_irqrestore(&port->port_lock, flags);
-}
-EXPORT_SYMBOL_GPL(gserial_disconnect);
-
-static int userial_init(void)
-{
- unsigned i;
- int status;
-
- gs_tty_driver = alloc_tty_driver(MAX_U_SERIAL_PORTS);
- if (!gs_tty_driver)
- return -ENOMEM;
-
- gs_tty_driver->driver_name = "g_serial";
- gs_tty_driver->name = PREFIX;
- /* uses dynamically assigned dev_t values */
-
- gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- gs_tty_driver->subtype = SERIAL_TYPE_NORMAL;
- gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- gs_tty_driver->init_termios = tty_std_termios;
-
- /* 9600-8-N-1 ... matches defaults expected by "usbser.sys" on
- * MS-Windows. Otherwise, most of these flags shouldn't affect
- * anything unless we were to actually hook up to a serial line.
- */
- gs_tty_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- gs_tty_driver->init_termios.c_ispeed = 9600;
- gs_tty_driver->init_termios.c_ospeed = 9600;
-
- tty_set_operations(gs_tty_driver, &gs_tty_ops);
- for (i = 0; i < MAX_U_SERIAL_PORTS; i++)
- mutex_init(&ports[i].lock);
-
- /* export the driver ... */
- status = tty_register_driver(gs_tty_driver);
- if (status) {
- pr_err("%s: cannot register, err %d\n",
- __func__, status);
- goto fail;
- }
-
- pr_debug("%s: registered %d ttyGS* device%s\n", __func__,
- MAX_U_SERIAL_PORTS,
- (MAX_U_SERIAL_PORTS == 1) ? "" : "s");
-
- return status;
-fail:
- put_tty_driver(gs_tty_driver);
- gs_tty_driver = NULL;
- return status;
-}
-module_init(userial_init);
-
-static void userial_cleanup(void)
-{
- tty_unregister_driver(gs_tty_driver);
- put_tty_driver(gs_tty_driver);
- gs_tty_driver = NULL;
-}
-module_exit(userial_cleanup);
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * u_serial.h - interface to USB gadget "serial port"/TTY utilities
- *
- * Copyright (C) 2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-#ifndef __U_SERIAL_H
-#define __U_SERIAL_H
-
-#include <linux/usb/composite.h>
-#include <linux/usb/cdc.h>
-
-#define MAX_U_SERIAL_PORTS 4
-
-struct f_serial_opts {
- struct usb_function_instance func_inst;
- u8 port_num;
-};
-
-/*
- * One non-multiplexed "serial" I/O port ... there can be several of these
- * on any given USB peripheral device, if it provides enough endpoints.
- *
- * The "u_serial" utility component exists to do one thing: manage TTY
- * style I/O using the USB peripheral endpoints listed here, including
- * hookups to sysfs and /dev for each logical "tty" device.
- *
- * REVISIT at least ACM could support tiocmget() if needed.
- *
- * REVISIT someday, allow multiplexing several TTYs over these endpoints.
- */
-struct gserial {
- struct usb_function func;
-
- /* port is managed by gserial_{connect,disconnect} */
- struct gs_port *ioport;
-
- struct usb_ep *in;
- struct usb_ep *out;
-
- /* REVISIT avoid this CDC-ACM support harder ... */
- struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
-
- /* notification callbacks */
- void (*connect)(struct gserial *p);
- void (*disconnect)(struct gserial *p);
- int (*send_break)(struct gserial *p, int duration);
-};
-
-/* utilities to allocate/free request and buffer */
-struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t flags);
-void gs_free_req(struct usb_ep *, struct usb_request *req);
-
-/* management of individual TTY ports */
-int gserial_alloc_line(unsigned char *port_line);
-void gserial_free_line(unsigned char port_line);
-
-/* connect/disconnect is handled by individual functions */
-int gserial_connect(struct gserial *, u8 port_num);
-void gserial_disconnect(struct gserial *);
-
-/* functions are bound to configurations by a config or gadget driver */
-int gser_bind_config(struct usb_configuration *c, u8 port_num);
-int obex_bind_config(struct usb_configuration *c, u8 port_num);
-
-#endif /* __U_SERIAL_H */
+++ /dev/null
-/*
- * u_uac1.c -- ALSA audio utilities for Gadget stack
- *
- * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
- * Copyright (C) 2008 Analog Devices, Inc
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/random.h>
-#include <linux/syscalls.h>
-
-#include "u_uac1.h"
-
-/*
- * This component encapsulates the ALSA devices for USB audio gadget
- */
-
-#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p"
-#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c"
-#define FILE_CONTROL "/dev/snd/controlC0"
-
-static char *fn_play = FILE_PCM_PLAYBACK;
-module_param(fn_play, charp, S_IRUGO);
-MODULE_PARM_DESC(fn_play, "Playback PCM device file name");
-
-static char *fn_cap = FILE_PCM_CAPTURE;
-module_param(fn_cap, charp, S_IRUGO);
-MODULE_PARM_DESC(fn_cap, "Capture PCM device file name");
-
-static char *fn_cntl = FILE_CONTROL;
-module_param(fn_cntl, charp, S_IRUGO);
-MODULE_PARM_DESC(fn_cntl, "Control device file name");
-
-/*-------------------------------------------------------------------------*/
-
-/**
- * Some ALSA internal helper functions
- */
-static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
-{
- struct snd_interval t;
- t.empty = 0;
- t.min = t.max = val;
- t.openmin = t.openmax = 0;
- t.integer = 1;
- return snd_interval_refine(i, &t);
-}
-
-static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
- snd_pcm_hw_param_t var, unsigned int val,
- int dir)
-{
- int changed;
- if (hw_is_mask(var)) {
- struct snd_mask *m = hw_param_mask(params, var);
- if (val == 0 && dir < 0) {
- changed = -EINVAL;
- snd_mask_none(m);
- } else {
- if (dir > 0)
- val++;
- else if (dir < 0)
- val--;
- changed = snd_mask_refine_set(
- hw_param_mask(params, var), val);
- }
- } else if (hw_is_interval(var)) {
- struct snd_interval *i = hw_param_interval(params, var);
- if (val == 0 && dir < 0) {
- changed = -EINVAL;
- snd_interval_none(i);
- } else if (dir == 0)
- changed = snd_interval_refine_set(i, val);
- else {
- struct snd_interval t;
- t.openmin = 1;
- t.openmax = 1;
- t.empty = 0;
- t.integer = 0;
- if (dir < 0) {
- t.min = val - 1;
- t.max = val;
- } else {
- t.min = val;
- t.max = val+1;
- }
- changed = snd_interval_refine(i, &t);
- }
- } else
- return -EINVAL;
- if (changed) {
- params->cmask |= 1 << var;
- params->rmask |= 1 << var;
- }
- return changed;
-}
-/*-------------------------------------------------------------------------*/
-
-/**
- * Set default hardware params
- */
-static int playback_default_hw_params(struct gaudio_snd_dev *snd)
-{
- struct snd_pcm_substream *substream = snd->substream;
- struct snd_pcm_hw_params *params;
- snd_pcm_sframes_t result;
-
- /*
- * SNDRV_PCM_ACCESS_RW_INTERLEAVED,
- * SNDRV_PCM_FORMAT_S16_LE
- * CHANNELS: 2
- * RATE: 48000
- */
- snd->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
- snd->format = SNDRV_PCM_FORMAT_S16_LE;
- snd->channels = 2;
- snd->rate = 48000;
-
- params = kzalloc(sizeof(*params), GFP_KERNEL);
- if (!params)
- return -ENOMEM;
-
- _snd_pcm_hw_params_any(params);
- _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
- snd->access, 0);
- _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
- snd->format, 0);
- _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
- snd->channels, 0);
- _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
- snd->rate, 0);
-
- snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
- snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, params);
-
- result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
- if (result < 0) {
- ERROR(snd->card,
- "Preparing sound card failed: %d\n", (int)result);
- kfree(params);
- return result;
- }
-
- /* Store the hardware parameters */
- snd->access = params_access(params);
- snd->format = params_format(params);
- snd->channels = params_channels(params);
- snd->rate = params_rate(params);
-
- kfree(params);
-
- INFO(snd->card,
- "Hardware params: access %x, format %x, channels %d, rate %d\n",
- snd->access, snd->format, snd->channels, snd->rate);
-
- return 0;
-}
-
-/**
- * Playback audio buffer data by ALSA PCM device
- */
-static size_t u_audio_playback(struct gaudio *card, void *buf, size_t count)
-{
- struct gaudio_snd_dev *snd = &card->playback;
- struct snd_pcm_substream *substream = snd->substream;
- struct snd_pcm_runtime *runtime = substream->runtime;
- mm_segment_t old_fs;
- ssize_t result;
- snd_pcm_sframes_t frames;
-
-try_again:
- if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
- runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
- result = snd_pcm_kernel_ioctl(substream,
- SNDRV_PCM_IOCTL_PREPARE, NULL);
- if (result < 0) {
- ERROR(card, "Preparing sound card failed: %d\n",
- (int)result);
- return result;
- }
- }
-
- frames = bytes_to_frames(runtime, count);
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- result = snd_pcm_lib_write(snd->substream, (void __user *)buf, frames);
- if (result != frames) {
- ERROR(card, "Playback error: %d\n", (int)result);
- set_fs(old_fs);
- goto try_again;
- }
- set_fs(old_fs);
-
- return 0;
-}
-
-static int u_audio_get_playback_channels(struct gaudio *card)
-{
- return card->playback.channels;
-}
-
-static int u_audio_get_playback_rate(struct gaudio *card)
-{
- return card->playback.rate;
-}
-
-/**
- * Open ALSA PCM and control device files
- * Initial the PCM or control device
- */
-static int gaudio_open_snd_dev(struct gaudio *card)
-{
- struct snd_pcm_file *pcm_file;
- struct gaudio_snd_dev *snd;
-
- if (!card)
- return -ENODEV;
-
- /* Open control device */
- snd = &card->control;
- snd->filp = filp_open(fn_cntl, O_RDWR, 0);
- if (IS_ERR(snd->filp)) {
- int ret = PTR_ERR(snd->filp);
- ERROR(card, "unable to open sound control device file: %s\n",
- fn_cntl);
- snd->filp = NULL;
- return ret;
- }
- snd->card = card;
-
- /* Open PCM playback device and setup substream */
- snd = &card->playback;
- snd->filp = filp_open(fn_play, O_WRONLY, 0);
- if (IS_ERR(snd->filp)) {
- int ret = PTR_ERR(snd->filp);
-
- ERROR(card, "No such PCM playback device: %s\n", fn_play);
- snd->filp = NULL;
- return ret;
- }
- pcm_file = snd->filp->private_data;
- snd->substream = pcm_file->substream;
- snd->card = card;
- playback_default_hw_params(snd);
-
- /* Open PCM capture device and setup substream */
- snd = &card->capture;
- snd->filp = filp_open(fn_cap, O_RDONLY, 0);
- if (IS_ERR(snd->filp)) {
- ERROR(card, "No such PCM capture device: %s\n", fn_cap);
- snd->substream = NULL;
- snd->card = NULL;
- snd->filp = NULL;
- } else {
- pcm_file = snd->filp->private_data;
- snd->substream = pcm_file->substream;
- snd->card = card;
- }
-
- return 0;
-}
-
-/**
- * Close ALSA PCM and control device files
- */
-static int gaudio_close_snd_dev(struct gaudio *gau)
-{
- struct gaudio_snd_dev *snd;
-
- /* Close control device */
- snd = &gau->control;
- if (snd->filp)
- filp_close(snd->filp, NULL);
-
- /* Close PCM playback device and setup substream */
- snd = &gau->playback;
- if (snd->filp)
- filp_close(snd->filp, NULL);
-
- /* Close PCM capture device and setup substream */
- snd = &gau->capture;
- if (snd->filp)
- filp_close(snd->filp, NULL);
-
- return 0;
-}
-
-static struct gaudio *the_card;
-/**
- * gaudio_setup - setup ALSA interface and preparing for USB transfer
- *
- * This sets up PCM, mixer or MIDI ALSA devices fore USB gadget using.
- *
- * Returns negative errno, or zero on success
- */
-int __init gaudio_setup(struct gaudio *card)
-{
- int ret;
-
- ret = gaudio_open_snd_dev(card);
- if (ret)
- ERROR(card, "we need at least one control device\n");
- else if (!the_card)
- the_card = card;
-
- return ret;
-
-}
-
-/**
- * gaudio_cleanup - remove ALSA device interface
- *
- * This is called to free all resources allocated by @gaudio_setup().
- */
-void gaudio_cleanup(void)
-{
- if (the_card) {
- gaudio_close_snd_dev(the_card);
- the_card = NULL;
- }
-}
-
+++ /dev/null
-/*
- * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities
- *
- * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
- * Copyright (C) 2008 Analog Devices, Inc
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#ifndef __U_AUDIO_H
-#define __U_AUDIO_H
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/usb/audio.h>
-#include <linux/usb/composite.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-
-#include "gadget_chips.h"
-
-/*
- * This represents the USB side of an audio card device, managed by a USB
- * function which provides control and stream interfaces.
- */
-
-struct gaudio_snd_dev {
- struct gaudio *card;
- struct file *filp;
- struct snd_pcm_substream *substream;
- int access;
- int format;
- int channels;
- int rate;
-};
-
-struct gaudio {
- struct usb_function func;
- struct usb_gadget *gadget;
-
- /* ALSA sound device interfaces */
- struct gaudio_snd_dev control;
- struct gaudio_snd_dev playback;
- struct gaudio_snd_dev capture;
-
- /* TODO */
-};
-
-int gaudio_setup(struct gaudio *card);
-void gaudio_cleanup(void);
-
-#endif /* __U_AUDIO_H */
+++ /dev/null
-/*
- * uvc_gadget.h -- USB Video Class Gadget driver
- *
- * Copyright (C) 2009-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef _UVC_GADGET_H_
-#define _UVC_GADGET_H_
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#include <linux/usb/ch9.h>
-
-#define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0)
-#define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0)
-#define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1)
-#define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2)
-#define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3)
-#define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4)
-#define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5)
-#define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5)
-
-struct uvc_request_data
-{
- __s32 length;
- __u8 data[60];
-};
-
-struct uvc_event
-{
- union {
- enum usb_device_speed speed;
- struct usb_ctrlrequest req;
- struct uvc_request_data data;
- };
-};
-
-#define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data)
-
-#define UVC_INTF_CONTROL 0
-#define UVC_INTF_STREAMING 1
-
-/* ------------------------------------------------------------------------
- * Debugging, printing and logging
- */
-
-#ifdef __KERNEL__
-
-#include <linux/usb.h> /* For usb_endpoint_* */
-#include <linux/usb/gadget.h>
-#include <linux/videodev2.h>
-#include <linux/version.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-device.h>
-
-#include "uvc_queue.h"
-
-#define UVC_TRACE_PROBE (1 << 0)
-#define UVC_TRACE_DESCR (1 << 1)
-#define UVC_TRACE_CONTROL (1 << 2)
-#define UVC_TRACE_FORMAT (1 << 3)
-#define UVC_TRACE_CAPTURE (1 << 4)
-#define UVC_TRACE_CALLS (1 << 5)
-#define UVC_TRACE_IOCTL (1 << 6)
-#define UVC_TRACE_FRAME (1 << 7)
-#define UVC_TRACE_SUSPEND (1 << 8)
-#define UVC_TRACE_STATUS (1 << 9)
-
-#define UVC_WARN_MINMAX 0
-#define UVC_WARN_PROBE_DEF 1
-
-extern unsigned int uvc_gadget_trace_param;
-
-#define uvc_trace(flag, msg...) \
- do { \
- if (uvc_gadget_trace_param & flag) \
- printk(KERN_DEBUG "uvcvideo: " msg); \
- } while (0)
-
-#define uvc_warn_once(dev, warn, msg...) \
- do { \
- if (!test_and_set_bit(warn, &dev->warnings)) \
- printk(KERN_INFO "uvcvideo: " msg); \
- } while (0)
-
-#define uvc_printk(level, msg...) \
- printk(level "uvcvideo: " msg)
-
-/* ------------------------------------------------------------------------
- * Driver specific constants
- */
-
-#define DRIVER_VERSION "0.1.0"
-#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0)
-
-#define UVC_NUM_REQUESTS 4
-#define UVC_MAX_REQUEST_SIZE 64
-#define UVC_MAX_EVENTS 4
-
-/* ------------------------------------------------------------------------
- * Structures
- */
-
-struct uvc_video
-{
- struct usb_ep *ep;
-
- /* Frame parameters */
- u8 bpp;
- u32 fcc;
- unsigned int width;
- unsigned int height;
- unsigned int imagesize;
-
- /* Requests */
- unsigned int req_size;
- struct usb_request *req[UVC_NUM_REQUESTS];
- __u8 *req_buffer[UVC_NUM_REQUESTS];
- struct list_head req_free;
- spinlock_t req_lock;
-
- void (*encode) (struct usb_request *req, struct uvc_video *video,
- struct uvc_buffer *buf);
-
- /* Context data used by the completion handler */
- __u32 payload_size;
- __u32 max_payload_size;
-
- struct uvc_video_queue queue;
- unsigned int fid;
-};
-
-enum uvc_state
-{
- UVC_STATE_DISCONNECTED,
- UVC_STATE_CONNECTED,
- UVC_STATE_STREAMING,
-};
-
-struct uvc_device
-{
- struct video_device *vdev;
- struct v4l2_device v4l2_dev;
- enum uvc_state state;
- struct usb_function func;
- struct uvc_video video;
-
- /* Descriptors */
- struct {
- const struct uvc_descriptor_header * const *fs_control;
- const struct uvc_descriptor_header * const *ss_control;
- const struct uvc_descriptor_header * const *fs_streaming;
- const struct uvc_descriptor_header * const *hs_streaming;
- const struct uvc_descriptor_header * const *ss_streaming;
- } desc;
-
- unsigned int control_intf;
- struct usb_ep *control_ep;
- struct usb_request *control_req;
- void *control_buf;
-
- unsigned int streaming_intf;
-
- /* Events */
- unsigned int event_length;
- unsigned int event_setup_out : 1;
-};
-
-static inline struct uvc_device *to_uvc(struct usb_function *f)
-{
- return container_of(f, struct uvc_device, func);
-}
-
-struct uvc_file_handle
-{
- struct v4l2_fh vfh;
- struct uvc_video *device;
-};
-
-#define to_uvc_file_handle(handle) \
- container_of(handle, struct uvc_file_handle, vfh)
-
-/* ------------------------------------------------------------------------
- * Functions
- */
-
-extern void uvc_function_setup_continue(struct uvc_device *uvc);
-extern void uvc_endpoint_stream(struct uvc_device *dev);
-
-extern void uvc_function_connect(struct uvc_device *uvc);
-extern void uvc_function_disconnect(struct uvc_device *uvc);
-
-#endif /* __KERNEL__ */
-
-#endif /* _UVC_GADGET_H_ */
-
+++ /dev/null
-/*
- * uvc_queue.c -- USB Video Class driver - Buffers management
- *
- * Copyright (C) 2005-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/atomic.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-#include <linux/videodev2.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-
-#include <media/v4l2-common.h>
-#include <media/videobuf2-vmalloc.h>
-
-#include "uvc.h"
-
-/* ------------------------------------------------------------------------
- * Video buffers queue management.
- *
- * Video queues is initialized by uvc_queue_init(). The function performs
- * basic initialization of the uvc_video_queue struct and never fails.
- *
- * Video buffers are managed by videobuf2. The driver uses a mutex to protect
- * the videobuf2 queue operations by serializing calls to videobuf2 and a
- * spinlock to protect the IRQ queue that holds the buffers to be processed by
- * the driver.
- */
-
-/* -----------------------------------------------------------------------------
- * videobuf2 queue operations
- */
-
-static int uvc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
- unsigned int *nbuffers, unsigned int *nplanes,
- unsigned int sizes[], void *alloc_ctxs[])
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
- struct uvc_video *video = container_of(queue, struct uvc_video, queue);
-
- if (*nbuffers > UVC_MAX_VIDEO_BUFFERS)
- *nbuffers = UVC_MAX_VIDEO_BUFFERS;
-
- *nplanes = 1;
-
- sizes[0] = video->imagesize;
-
- return 0;
-}
-
-static int uvc_buffer_prepare(struct vb2_buffer *vb)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
- struct uvc_buffer *buf = container_of(vb, struct uvc_buffer, buf);
-
- if (vb->v4l2_buf.type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
- vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
- uvc_trace(UVC_TRACE_CAPTURE, "[E] Bytes used out of bounds.\n");
- return -EINVAL;
- }
-
- if (unlikely(queue->flags & UVC_QUEUE_DISCONNECTED))
- return -ENODEV;
-
- buf->state = UVC_BUF_STATE_QUEUED;
- buf->mem = vb2_plane_vaddr(vb, 0);
- buf->length = vb2_plane_size(vb, 0);
- if (vb->v4l2_buf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
- buf->bytesused = 0;
- else
- buf->bytesused = vb2_get_plane_payload(vb, 0);
-
- return 0;
-}
-
-static void uvc_buffer_queue(struct vb2_buffer *vb)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
- struct uvc_buffer *buf = container_of(vb, struct uvc_buffer, buf);
- unsigned long flags;
-
- spin_lock_irqsave(&queue->irqlock, flags);
-
- if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
- list_add_tail(&buf->queue, &queue->irqqueue);
- } else {
- /* If the device is disconnected return the buffer to userspace
- * directly. The next QBUF call will fail with -ENODEV.
- */
- buf->state = UVC_BUF_STATE_ERROR;
- vb2_buffer_done(&buf->buf, VB2_BUF_STATE_ERROR);
- }
-
- spin_unlock_irqrestore(&queue->irqlock, flags);
-}
-
-static void uvc_wait_prepare(struct vb2_queue *vq)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
- mutex_unlock(&queue->mutex);
-}
-
-static void uvc_wait_finish(struct vb2_queue *vq)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
- mutex_lock(&queue->mutex);
-}
-
-static struct vb2_ops uvc_queue_qops = {
- .queue_setup = uvc_queue_setup,
- .buf_prepare = uvc_buffer_prepare,
- .buf_queue = uvc_buffer_queue,
- .wait_prepare = uvc_wait_prepare,
- .wait_finish = uvc_wait_finish,
-};
-
-static int uvc_queue_init(struct uvc_video_queue *queue,
- enum v4l2_buf_type type)
-{
- int ret;
-
- queue->queue.type = type;
- queue->queue.io_modes = VB2_MMAP | VB2_USERPTR;
- queue->queue.drv_priv = queue;
- queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
- queue->queue.ops = &uvc_queue_qops;
- queue->queue.mem_ops = &vb2_vmalloc_memops;
- queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
- | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
- ret = vb2_queue_init(&queue->queue);
- if (ret)
- return ret;
-
- mutex_init(&queue->mutex);
- spin_lock_init(&queue->irqlock);
- INIT_LIST_HEAD(&queue->irqqueue);
- queue->flags = 0;
-
- return 0;
-}
-
-/*
- * Free the video buffers.
- */
-static void uvc_free_buffers(struct uvc_video_queue *queue)
-{
- mutex_lock(&queue->mutex);
- vb2_queue_release(&queue->queue);
- mutex_unlock(&queue->mutex);
-}
-
-/*
- * Allocate the video buffers.
- */
-static int uvc_alloc_buffers(struct uvc_video_queue *queue,
- struct v4l2_requestbuffers *rb)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_reqbufs(&queue->queue, rb);
- mutex_unlock(&queue->mutex);
-
- return ret ? ret : rb->count;
-}
-
-static int uvc_query_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *buf)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_querybuf(&queue->queue, buf);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-static int uvc_queue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *buf)
-{
- unsigned long flags;
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_qbuf(&queue->queue, buf);
- if (ret < 0)
- goto done;
-
- spin_lock_irqsave(&queue->irqlock, flags);
- ret = (queue->flags & UVC_QUEUE_PAUSED) != 0;
- queue->flags &= ~UVC_QUEUE_PAUSED;
- spin_unlock_irqrestore(&queue->irqlock, flags);
-
-done:
- mutex_unlock(&queue->mutex);
- return ret;
-}
-
-/*
- * Dequeue a video buffer. If nonblocking is false, block until a buffer is
- * available.
- */
-static int uvc_dequeue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *buf, int nonblocking)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-/*
- * Poll the video queue.
- *
- * This function implements video queue polling and is intended to be used by
- * the device poll handler.
- */
-static unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
- struct file *file, poll_table *wait)
-{
- unsigned int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_poll(&queue->queue, file, wait);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-static int uvc_queue_mmap(struct uvc_video_queue *queue,
- struct vm_area_struct *vma)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_mmap(&queue->queue, vma);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-#ifndef CONFIG_MMU
-/*
- * Get unmapped area.
- *
- * NO-MMU arch need this function to make mmap() work correctly.
- */
-static unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
- unsigned long pgoff)
-{
- unsigned long ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
- mutex_unlock(&queue->mutex);
- return ret;
-}
-#endif
-
-/*
- * Cancel the video buffers queue.
- *
- * Cancelling the queue marks all buffers on the irq queue as erroneous,
- * wakes them up and removes them from the queue.
- *
- * If the disconnect parameter is set, further calls to uvc_queue_buffer will
- * fail with -ENODEV.
- *
- * This function acquires the irq spinlock and can be called from interrupt
- * context.
- */
-static void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect)
-{
- struct uvc_buffer *buf;
- unsigned long flags;
-
- spin_lock_irqsave(&queue->irqlock, flags);
- while (!list_empty(&queue->irqqueue)) {
- buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
- queue);
- list_del(&buf->queue);
- buf->state = UVC_BUF_STATE_ERROR;
- vb2_buffer_done(&buf->buf, VB2_BUF_STATE_ERROR);
- }
- /* This must be protected by the irqlock spinlock to avoid race
- * conditions between uvc_queue_buffer and the disconnection event that
- * could result in an interruptible wait in uvc_dequeue_buffer. Do not
- * blindly replace this logic by checking for the UVC_DEV_DISCONNECTED
- * state outside the queue code.
- */
- if (disconnect)
- queue->flags |= UVC_QUEUE_DISCONNECTED;
- spin_unlock_irqrestore(&queue->irqlock, flags);
-}
-
-/*
- * Enable or disable the video buffers queue.
- *
- * The queue must be enabled before starting video acquisition and must be
- * disabled after stopping it. This ensures that the video buffers queue
- * state can be properly initialized before buffers are accessed from the
- * interrupt handler.
- *
- * Enabling the video queue initializes parameters (such as sequence number,
- * sync pattern, ...). If the queue is already enabled, return -EBUSY.
- *
- * Disabling the video queue cancels the queue and removes all buffers from
- * the main queue.
- *
- * This function can't be called from interrupt context. Use
- * uvc_queue_cancel() instead.
- */
-static int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
-{
- unsigned long flags;
- int ret = 0;
-
- mutex_lock(&queue->mutex);
- if (enable) {
- ret = vb2_streamon(&queue->queue, queue->queue.type);
- if (ret < 0)
- goto done;
-
- queue->sequence = 0;
- queue->buf_used = 0;
- } else {
- ret = vb2_streamoff(&queue->queue, queue->queue.type);
- if (ret < 0)
- goto done;
-
- spin_lock_irqsave(&queue->irqlock, flags);
- INIT_LIST_HEAD(&queue->irqqueue);
-
- /*
- * FIXME: We need to clear the DISCONNECTED flag to ensure that
- * applications will be able to queue buffers for the next
- * streaming run. However, clearing it here doesn't guarantee
- * that the device will be reconnected in the meantime.
- */
- queue->flags &= ~UVC_QUEUE_DISCONNECTED;
- spin_unlock_irqrestore(&queue->irqlock, flags);
- }
-
-done:
- mutex_unlock(&queue->mutex);
- return ret;
-}
-
-/* called with &queue_irqlock held.. */
-static struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
- struct uvc_buffer *buf)
-{
- struct uvc_buffer *nextbuf;
-
- if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) &&
- buf->length != buf->bytesused) {
- buf->state = UVC_BUF_STATE_QUEUED;
- vb2_set_plane_payload(&buf->buf, 0, 0);
- return buf;
- }
-
- list_del(&buf->queue);
- if (!list_empty(&queue->irqqueue))
- nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
- queue);
- else
- nextbuf = NULL;
-
- buf->buf.v4l2_buf.field = V4L2_FIELD_NONE;
- buf->buf.v4l2_buf.sequence = queue->sequence++;
- v4l2_get_timestamp(&buf->buf.v4l2_buf.timestamp);
-
- vb2_set_plane_payload(&buf->buf, 0, buf->bytesused);
- vb2_buffer_done(&buf->buf, VB2_BUF_STATE_DONE);
-
- return nextbuf;
-}
-
-static struct uvc_buffer *uvc_queue_head(struct uvc_video_queue *queue)
-{
- struct uvc_buffer *buf = NULL;
-
- if (!list_empty(&queue->irqqueue))
- buf = list_first_entry(&queue->irqqueue, struct uvc_buffer,
- queue);
- else
- queue->flags |= UVC_QUEUE_PAUSED;
-
- return buf;
-}
-
+++ /dev/null
-#ifndef _UVC_QUEUE_H_
-#define _UVC_QUEUE_H_
-
-#ifdef __KERNEL__
-
-#include <linux/kernel.h>
-#include <linux/poll.h>
-#include <linux/videodev2.h>
-#include <media/videobuf2-core.h>
-
-/* Maximum frame size in bytes, for sanity checking. */
-#define UVC_MAX_FRAME_SIZE (16*1024*1024)
-/* Maximum number of video buffers. */
-#define UVC_MAX_VIDEO_BUFFERS 32
-
-/* ------------------------------------------------------------------------
- * Structures.
- */
-
-enum uvc_buffer_state {
- UVC_BUF_STATE_IDLE = 0,
- UVC_BUF_STATE_QUEUED = 1,
- UVC_BUF_STATE_ACTIVE = 2,
- UVC_BUF_STATE_DONE = 3,
- UVC_BUF_STATE_ERROR = 4,
-};
-
-struct uvc_buffer {
- struct vb2_buffer buf;
- struct list_head queue;
-
- enum uvc_buffer_state state;
- void *mem;
- unsigned int length;
- unsigned int bytesused;
-};
-
-#define UVC_QUEUE_DISCONNECTED (1 << 0)
-#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1)
-#define UVC_QUEUE_PAUSED (1 << 2)
-
-struct uvc_video_queue {
- struct vb2_queue queue;
- struct mutex mutex; /* Protects queue */
-
- unsigned int flags;
- __u32 sequence;
-
- unsigned int buf_used;
-
- spinlock_t irqlock; /* Protects flags and irqqueue */
- struct list_head irqqueue;
-};
-
-static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
-{
- return vb2_is_streaming(&queue->queue);
-}
-
-#endif /* __KERNEL__ */
-
-#endif /* _UVC_QUEUE_H_ */
-
+++ /dev/null
-/*
- * uvc_v4l2.c -- USB Video Class Gadget driver
- *
- * Copyright (C) 2009-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/videodev2.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-
-#include <media/v4l2-dev.h>
-#include <media/v4l2-event.h>
-#include <media/v4l2-ioctl.h>
-
-#include "uvc.h"
-#include "uvc_queue.h"
-
-/* --------------------------------------------------------------------------
- * Requests handling
- */
-
-static int
-uvc_send_response(struct uvc_device *uvc, struct uvc_request_data *data)
-{
- struct usb_composite_dev *cdev = uvc->func.config->cdev;
- struct usb_request *req = uvc->control_req;
-
- if (data->length < 0)
- return usb_ep_set_halt(cdev->gadget->ep0);
-
- req->length = min_t(unsigned int, uvc->event_length, data->length);
- req->zero = data->length < uvc->event_length;
-
- memcpy(req->buf, data->data, req->length);
-
- return usb_ep_queue(cdev->gadget->ep0, req, GFP_KERNEL);
-}
-
-/* --------------------------------------------------------------------------
- * V4L2
- */
-
-struct uvc_format
-{
- u8 bpp;
- u32 fcc;
-};
-
-static struct uvc_format uvc_formats[] = {
- { 16, V4L2_PIX_FMT_YUYV },
- { 0, V4L2_PIX_FMT_MJPEG },
-};
-
-static int
-uvc_v4l2_get_format(struct uvc_video *video, struct v4l2_format *fmt)
-{
- fmt->fmt.pix.pixelformat = video->fcc;
- fmt->fmt.pix.width = video->width;
- fmt->fmt.pix.height = video->height;
- fmt->fmt.pix.field = V4L2_FIELD_NONE;
- fmt->fmt.pix.bytesperline = video->bpp * video->width / 8;
- fmt->fmt.pix.sizeimage = video->imagesize;
- fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
- fmt->fmt.pix.priv = 0;
-
- return 0;
-}
-
-static int
-uvc_v4l2_set_format(struct uvc_video *video, struct v4l2_format *fmt)
-{
- struct uvc_format *format;
- unsigned int imagesize;
- unsigned int bpl;
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(uvc_formats); ++i) {
- format = &uvc_formats[i];
- if (format->fcc == fmt->fmt.pix.pixelformat)
- break;
- }
-
- if (i == ARRAY_SIZE(uvc_formats)) {
- printk(KERN_INFO "Unsupported format 0x%08x.\n",
- fmt->fmt.pix.pixelformat);
- return -EINVAL;
- }
-
- bpl = format->bpp * fmt->fmt.pix.width / 8;
- imagesize = bpl ? bpl * fmt->fmt.pix.height : fmt->fmt.pix.sizeimage;
-
- video->fcc = format->fcc;
- video->bpp = format->bpp;
- video->width = fmt->fmt.pix.width;
- video->height = fmt->fmt.pix.height;
- video->imagesize = imagesize;
-
- fmt->fmt.pix.field = V4L2_FIELD_NONE;
- fmt->fmt.pix.bytesperline = bpl;
- fmt->fmt.pix.sizeimage = imagesize;
- fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
- fmt->fmt.pix.priv = 0;
-
- return 0;
-}
-
-static int
-uvc_v4l2_open(struct file *file)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_device *uvc = video_get_drvdata(vdev);
- struct uvc_file_handle *handle;
-
- handle = kzalloc(sizeof(*handle), GFP_KERNEL);
- if (handle == NULL)
- return -ENOMEM;
-
- v4l2_fh_init(&handle->vfh, vdev);
- v4l2_fh_add(&handle->vfh);
-
- handle->device = &uvc->video;
- file->private_data = &handle->vfh;
-
- uvc_function_connect(uvc);
- return 0;
-}
-
-static int
-uvc_v4l2_release(struct file *file)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_device *uvc = video_get_drvdata(vdev);
- struct uvc_file_handle *handle = to_uvc_file_handle(file->private_data);
- struct uvc_video *video = handle->device;
-
- uvc_function_disconnect(uvc);
-
- uvc_video_enable(video, 0);
- uvc_free_buffers(&video->queue);
-
- file->private_data = NULL;
- v4l2_fh_del(&handle->vfh);
- v4l2_fh_exit(&handle->vfh);
- kfree(handle);
-
- return 0;
-}
-
-static long
-uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_device *uvc = video_get_drvdata(vdev);
- struct uvc_file_handle *handle = to_uvc_file_handle(file->private_data);
- struct usb_composite_dev *cdev = uvc->func.config->cdev;
- struct uvc_video *video = &uvc->video;
- int ret = 0;
-
- switch (cmd) {
- /* Query capabilities */
- case VIDIOC_QUERYCAP:
- {
- struct v4l2_capability *cap = arg;
-
- memset(cap, 0, sizeof *cap);
- strlcpy(cap->driver, "g_uvc", sizeof(cap->driver));
- strlcpy(cap->card, cdev->gadget->name, sizeof(cap->card));
- strlcpy(cap->bus_info, dev_name(&cdev->gadget->dev),
- sizeof cap->bus_info);
- cap->version = DRIVER_VERSION_NUMBER;
- cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
- break;
- }
-
- /* Get & Set format */
- case VIDIOC_G_FMT:
- {
- struct v4l2_format *fmt = arg;
-
- if (fmt->type != video->queue.queue.type)
- return -EINVAL;
-
- return uvc_v4l2_get_format(video, fmt);
- }
-
- case VIDIOC_S_FMT:
- {
- struct v4l2_format *fmt = arg;
-
- if (fmt->type != video->queue.queue.type)
- return -EINVAL;
-
- return uvc_v4l2_set_format(video, fmt);
- }
-
- /* Buffers & streaming */
- case VIDIOC_REQBUFS:
- {
- struct v4l2_requestbuffers *rb = arg;
-
- if (rb->type != video->queue.queue.type)
- return -EINVAL;
-
- ret = uvc_alloc_buffers(&video->queue, rb);
- if (ret < 0)
- return ret;
-
- ret = 0;
- break;
- }
-
- case VIDIOC_QUERYBUF:
- {
- struct v4l2_buffer *buf = arg;
-
- return uvc_query_buffer(&video->queue, buf);
- }
-
- case VIDIOC_QBUF:
- if ((ret = uvc_queue_buffer(&video->queue, arg)) < 0)
- return ret;
-
- return uvc_video_pump(video);
-
- case VIDIOC_DQBUF:
- return uvc_dequeue_buffer(&video->queue, arg,
- file->f_flags & O_NONBLOCK);
-
- case VIDIOC_STREAMON:
- {
- int *type = arg;
-
- if (*type != video->queue.queue.type)
- return -EINVAL;
-
- /* Enable UVC video. */
- ret = uvc_video_enable(video, 1);
- if (ret < 0)
- return ret;
-
- /*
- * Complete the alternate setting selection setup phase now that
- * userspace is ready to provide video frames.
- */
- uvc_function_setup_continue(uvc);
- uvc->state = UVC_STATE_STREAMING;
-
- return 0;
- }
-
- case VIDIOC_STREAMOFF:
- {
- int *type = arg;
-
- if (*type != video->queue.queue.type)
- return -EINVAL;
-
- return uvc_video_enable(video, 0);
- }
-
- /* Events */
- case VIDIOC_DQEVENT:
- {
- struct v4l2_event *event = arg;
-
- ret = v4l2_event_dequeue(&handle->vfh, event,
- file->f_flags & O_NONBLOCK);
- if (ret == 0 && event->type == UVC_EVENT_SETUP) {
- struct uvc_event *uvc_event = (void *)&event->u.data;
-
- /* Tell the complete callback to generate an event for
- * the next request that will be enqueued by
- * uvc_event_write.
- */
- uvc->event_setup_out =
- !(uvc_event->req.bRequestType & USB_DIR_IN);
- uvc->event_length = uvc_event->req.wLength;
- }
-
- return ret;
- }
-
- case VIDIOC_SUBSCRIBE_EVENT:
- {
- struct v4l2_event_subscription *sub = arg;
-
- if (sub->type < UVC_EVENT_FIRST || sub->type > UVC_EVENT_LAST)
- return -EINVAL;
-
- return v4l2_event_subscribe(&handle->vfh, arg, 2, NULL);
- }
-
- case VIDIOC_UNSUBSCRIBE_EVENT:
- return v4l2_event_unsubscribe(&handle->vfh, arg);
-
- case UVCIOC_SEND_RESPONSE:
- ret = uvc_send_response(uvc, arg);
- break;
-
- default:
- return -ENOIOCTLCMD;
- }
-
- return ret;
-}
-
-static long
-uvc_v4l2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);
-}
-
-static int
-uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_device *uvc = video_get_drvdata(vdev);
-
- return uvc_queue_mmap(&uvc->video.queue, vma);
-}
-
-static unsigned int
-uvc_v4l2_poll(struct file *file, poll_table *wait)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_device *uvc = video_get_drvdata(vdev);
-
- return uvc_queue_poll(&uvc->video.queue, file, wait);
-}
-
-#ifndef CONFIG_MMU
-static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
- unsigned long addr, unsigned long len, unsigned long pgoff,
- unsigned long flags)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_device *uvc = video_get_drvdata(vdev);
-
- return uvc_queue_get_unmapped_area(&uvc->video.queue, pgoff);
-}
-#endif
-
-static struct v4l2_file_operations uvc_v4l2_fops = {
- .owner = THIS_MODULE,
- .open = uvc_v4l2_open,
- .release = uvc_v4l2_release,
- .ioctl = uvc_v4l2_ioctl,
- .mmap = uvc_v4l2_mmap,
- .poll = uvc_v4l2_poll,
-#ifndef CONFIG_MMU
- .get_unmapped_area = uvc_v4l2_get_unmapped_area,
-#endif
-};
-
+++ /dev/null
-/*
- * uvc_video.c -- USB Video Class Gadget driver
- *
- * Copyright (C) 2009-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-#include <media/v4l2-dev.h>
-
-#include "uvc.h"
-#include "uvc_queue.h"
-
-/* --------------------------------------------------------------------------
- * Video codecs
- */
-
-static int
-uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf,
- u8 *data, int len)
-{
- data[0] = 2;
- data[1] = UVC_STREAM_EOH | video->fid;
-
- if (buf->bytesused - video->queue.buf_used <= len - 2)
- data[1] |= UVC_STREAM_EOF;
-
- return 2;
-}
-
-static int
-uvc_video_encode_data(struct uvc_video *video, struct uvc_buffer *buf,
- u8 *data, int len)
-{
- struct uvc_video_queue *queue = &video->queue;
- unsigned int nbytes;
- void *mem;
-
- /* Copy video data to the USB buffer. */
- mem = buf->mem + queue->buf_used;
- nbytes = min((unsigned int)len, buf->bytesused - queue->buf_used);
-
- memcpy(data, mem, nbytes);
- queue->buf_used += nbytes;
-
- return nbytes;
-}
-
-static void
-uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video,
- struct uvc_buffer *buf)
-{
- void *mem = req->buf;
- int len = video->req_size;
- int ret;
-
- /* Add a header at the beginning of the payload. */
- if (video->payload_size == 0) {
- ret = uvc_video_encode_header(video, buf, mem, len);
- video->payload_size += ret;
- mem += ret;
- len -= ret;
- }
-
- /* Process video data. */
- len = min((int)(video->max_payload_size - video->payload_size), len);
- ret = uvc_video_encode_data(video, buf, mem, len);
-
- video->payload_size += ret;
- len -= ret;
-
- req->length = video->req_size - len;
- req->zero = video->payload_size == video->max_payload_size;
-
- if (buf->bytesused == video->queue.buf_used) {
- video->queue.buf_used = 0;
- buf->state = UVC_BUF_STATE_DONE;
- uvc_queue_next_buffer(&video->queue, buf);
- video->fid ^= UVC_STREAM_FID;
-
- video->payload_size = 0;
- }
-
- if (video->payload_size == video->max_payload_size ||
- buf->bytesused == video->queue.buf_used)
- video->payload_size = 0;
-}
-
-static void
-uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video,
- struct uvc_buffer *buf)
-{
- void *mem = req->buf;
- int len = video->req_size;
- int ret;
-
- /* Add the header. */
- ret = uvc_video_encode_header(video, buf, mem, len);
- mem += ret;
- len -= ret;
-
- /* Process video data. */
- ret = uvc_video_encode_data(video, buf, mem, len);
- len -= ret;
-
- req->length = video->req_size - len;
-
- if (buf->bytesused == video->queue.buf_used) {
- video->queue.buf_used = 0;
- buf->state = UVC_BUF_STATE_DONE;
- uvc_queue_next_buffer(&video->queue, buf);
- video->fid ^= UVC_STREAM_FID;
- }
-}
-
-/* --------------------------------------------------------------------------
- * Request handling
- */
-
-/*
- * I somehow feel that synchronisation won't be easy to achieve here. We have
- * three events that control USB requests submission:
- *
- * - USB request completion: the completion handler will resubmit the request
- * if a video buffer is available.
- *
- * - USB interface setting selection: in response to a SET_INTERFACE request,
- * the handler will start streaming if a video buffer is available and if
- * video is not currently streaming.
- *
- * - V4L2 buffer queueing: the driver will start streaming if video is not
- * currently streaming.
- *
- * Race conditions between those 3 events might lead to deadlocks or other
- * nasty side effects.
- *
- * The "video currently streaming" condition can't be detected by the irqqueue
- * being empty, as a request can still be in flight. A separate "queue paused"
- * flag is thus needed.
- *
- * The paused flag will be set when we try to retrieve the irqqueue head if the
- * queue is empty, and cleared when we queue a buffer.
- *
- * The USB request completion handler will get the buffer at the irqqueue head
- * under protection of the queue spinlock. If the queue is empty, the streaming
- * paused flag will be set. Right after releasing the spinlock a userspace
- * application can queue a buffer. The flag will then cleared, and the ioctl
- * handler will restart the video stream.
- */
-static void
-uvc_video_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct uvc_video *video = req->context;
- struct uvc_video_queue *queue = &video->queue;
- struct uvc_buffer *buf;
- unsigned long flags;
- int ret;
-
- switch (req->status) {
- case 0:
- break;
-
- case -ESHUTDOWN: /* disconnect from host. */
- printk(KERN_INFO "VS request cancelled.\n");
- uvc_queue_cancel(queue, 1);
- goto requeue;
-
- default:
- printk(KERN_INFO "VS request completed with status %d.\n",
- req->status);
- uvc_queue_cancel(queue, 0);
- goto requeue;
- }
-
- spin_lock_irqsave(&video->queue.irqlock, flags);
- buf = uvc_queue_head(&video->queue);
- if (buf == NULL) {
- spin_unlock_irqrestore(&video->queue.irqlock, flags);
- goto requeue;
- }
-
- video->encode(req, video, buf);
-
- if ((ret = usb_ep_queue(ep, req, GFP_ATOMIC)) < 0) {
- printk(KERN_INFO "Failed to queue request (%d).\n", ret);
- usb_ep_set_halt(ep);
- spin_unlock_irqrestore(&video->queue.irqlock, flags);
- goto requeue;
- }
- spin_unlock_irqrestore(&video->queue.irqlock, flags);
-
- return;
-
-requeue:
- spin_lock_irqsave(&video->req_lock, flags);
- list_add_tail(&req->list, &video->req_free);
- spin_unlock_irqrestore(&video->req_lock, flags);
-}
-
-static int
-uvc_video_free_requests(struct uvc_video *video)
-{
- unsigned int i;
-
- for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
- if (video->req[i]) {
- usb_ep_free_request(video->ep, video->req[i]);
- video->req[i] = NULL;
- }
-
- if (video->req_buffer[i]) {
- kfree(video->req_buffer[i]);
- video->req_buffer[i] = NULL;
- }
- }
-
- INIT_LIST_HEAD(&video->req_free);
- video->req_size = 0;
- return 0;
-}
-
-static int
-uvc_video_alloc_requests(struct uvc_video *video)
-{
- unsigned int req_size;
- unsigned int i;
- int ret = -ENOMEM;
-
- BUG_ON(video->req_size);
-
- req_size = video->ep->maxpacket
- * max_t(unsigned int, video->ep->maxburst, 1)
- * (video->ep->mult + 1);
-
- for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
- video->req_buffer[i] = kmalloc(req_size, GFP_KERNEL);
- if (video->req_buffer[i] == NULL)
- goto error;
-
- video->req[i] = usb_ep_alloc_request(video->ep, GFP_KERNEL);
- if (video->req[i] == NULL)
- goto error;
-
- video->req[i]->buf = video->req_buffer[i];
- video->req[i]->length = 0;
- video->req[i]->complete = uvc_video_complete;
- video->req[i]->context = video;
-
- list_add_tail(&video->req[i]->list, &video->req_free);
- }
-
- video->req_size = req_size;
-
- return 0;
-
-error:
- uvc_video_free_requests(video);
- return ret;
-}
-
-/* --------------------------------------------------------------------------
- * Video streaming
- */
-
-/*
- * uvc_video_pump - Pump video data into the USB requests
- *
- * This function fills the available USB requests (listed in req_free) with
- * video data from the queued buffers.
- */
-static int
-uvc_video_pump(struct uvc_video *video)
-{
- struct usb_request *req;
- struct uvc_buffer *buf;
- unsigned long flags;
- int ret;
-
- /* FIXME TODO Race between uvc_video_pump and requests completion
- * handler ???
- */
-
- while (1) {
- /* Retrieve the first available USB request, protected by the
- * request lock.
- */
- spin_lock_irqsave(&video->req_lock, flags);
- if (list_empty(&video->req_free)) {
- spin_unlock_irqrestore(&video->req_lock, flags);
- return 0;
- }
- req = list_first_entry(&video->req_free, struct usb_request,
- list);
- list_del(&req->list);
- spin_unlock_irqrestore(&video->req_lock, flags);
-
- /* Retrieve the first available video buffer and fill the
- * request, protected by the video queue irqlock.
- */
- spin_lock_irqsave(&video->queue.irqlock, flags);
- buf = uvc_queue_head(&video->queue);
- if (buf == NULL) {
- spin_unlock_irqrestore(&video->queue.irqlock, flags);
- break;
- }
-
- video->encode(req, video, buf);
-
- /* Queue the USB request */
- ret = usb_ep_queue(video->ep, req, GFP_ATOMIC);
- if (ret < 0) {
- printk(KERN_INFO "Failed to queue request (%d)\n", ret);
- usb_ep_set_halt(video->ep);
- spin_unlock_irqrestore(&video->queue.irqlock, flags);
- break;
- }
- spin_unlock_irqrestore(&video->queue.irqlock, flags);
- }
-
- spin_lock_irqsave(&video->req_lock, flags);
- list_add_tail(&req->list, &video->req_free);
- spin_unlock_irqrestore(&video->req_lock, flags);
- return 0;
-}
-
-/*
- * Enable or disable the video stream.
- */
-static int
-uvc_video_enable(struct uvc_video *video, int enable)
-{
- unsigned int i;
- int ret;
-
- if (video->ep == NULL) {
- printk(KERN_INFO "Video enable failed, device is "
- "uninitialized.\n");
- return -ENODEV;
- }
-
- if (!enable) {
- for (i = 0; i < UVC_NUM_REQUESTS; ++i)
- usb_ep_dequeue(video->ep, video->req[i]);
-
- uvc_video_free_requests(video);
- uvc_queue_enable(&video->queue, 0);
- return 0;
- }
-
- if ((ret = uvc_queue_enable(&video->queue, 1)) < 0)
- return ret;
-
- if ((ret = uvc_video_alloc_requests(video)) < 0)
- return ret;
-
- if (video->max_payload_size) {
- video->encode = uvc_video_encode_bulk;
- video->payload_size = 0;
- } else
- video->encode = uvc_video_encode_isoc;
-
- return uvc_video_pump(video);
-}
-
-/*
- * Initialize the UVC video stream.
- */
-static int
-uvc_video_init(struct uvc_video *video)
-{
- INIT_LIST_HEAD(&video->req_free);
- spin_lock_init(&video->req_lock);
-
- video->fcc = V4L2_PIX_FMT_YUYV;
- video->bpp = 16;
- video->width = 320;
- video->height = 240;
- video->imagesize = 320 * 240 * 2;
-
- /* Initialize the video buffers queue. */
- uvc_queue_init(&video->queue, V4L2_BUF_TYPE_VIDEO_OUTPUT);
- return 0;
-}
-
projects / mirror_ubuntu-jammy-kernel.git / commitdiff