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[PATCH] USB: usbnet (1/9) clean up framing
[mirror_ubuntu-artful-kernel.git] / drivers / usb / net / usbnet.c
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1da177e4
LT		 1/*
2 * USB Networking Links
f29fc259 3 * Copyright (C) 2000-2005 by David Brownell
1da177e4
LT		 4 * Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
5 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
6 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
7 * Copyright (c) 2002-2003 TiVo Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24/*
25 * This is a generic "USB networking" framework that works with several
26 * kinds of full and high speed networking devices:
27 *
28 * + USB host-to-host "network cables", used for IP-over-USB links.
29 * These are often used for Laplink style connectivity products.
30 * - AnchorChip 2720
31 * - Belkin, eTEK (interops with Win32 drivers)
32 * - GeneSys GL620USB-A
33 * - NetChip 1080 (interoperates with NetChip Win32 drivers)
34 * - Prolific PL-2301/2302 (replaces "plusb" driver)
35 * - KC Technology KC2190
36 *
37 * + Smart USB devices can support such links directly, using Internet
38 * standard protocols instead of proprietary host-to-device links.
39 * - Linux PDAs like iPaq, Yopy, and Zaurus
40 * - The BLOB boot loader (for diskless booting)
41 * - Linux "gadgets", perhaps using PXA-2xx or Net2280 controllers
42 * - Devices using EPSON's sample USB firmware
43 * - CDC-Ethernet class devices, such as many cable modems
44 *
45 * + Adapters to networks such as Ethernet.
46 * - AX8817X based USB 2.0 products
47 *
48 * Links to these devices can be bridged using Linux Ethernet bridging.
49 * With minor exceptions, these all use similar USB framing for network
50 * traffic, but need different protocols for control traffic.
51 *
52 * USB devices can implement their side of this protocol at the cost
53 * of two bulk endpoints; it's not restricted to "cable" applications.
54 * See the SA1110, Zaurus, or EPSON device/client support in this driver;
55 * slave/target drivers such as "usb-eth" (on most SA-1100 PDAs) or
56 * "g_ether" (in the Linux "gadget" framework) implement that behavior
57 * within devices.
58 *
59 *
60 * CHANGELOG:
61 *
62 * 13-sep-2000 experimental, new
63 * 10-oct-2000 usb_device_id table created.
64 * 28-oct-2000 misc fixes; mostly, discard more TTL-mangled rx packets.
65 * 01-nov-2000 usb_device_id table and probing api update by
66 * Adam J. Richter <adam@yggdrasil.com>.
67 * 18-dec-2000 (db) tx watchdog, "net1080" renaming to "usbnet", device_info
68 * and prolific support, isolate net1080-specific bits, cleanup.
69 * fix unlink_urbs oops in D3 PM resume code path.
70 *
71 * 02-feb-2001 (db) fix tx skb sharing, packet length, match_flags, ...
72 * 08-feb-2001 stubbed in "linuxdev", maybe the SA-1100 folk can use it;
73 * AnchorChips 2720 support (from spec) for testing;
74 * fix bit-ordering problem with ethernet multicast addr
75 * 19-feb-2001 Support for clearing halt conditions. SA1100 UDC support
76 * updates. Oleg Drokin (green@iXcelerator.com)
77 * 25-mar-2001 More SA-1100 updates, including workaround for ip problem
78 * expecting cleared skb->cb and framing change to match latest
79 * handhelds.org version (Oleg). Enable device IDs from the
80 * Win32 Belkin driver; other cleanups (db).
81 * 16-jul-2001 Bugfixes for uhci oops-on-unplug, Belkin support, various
82 * cleanups for problems not yet seen in the field. (db)
83 * 17-oct-2001 Handle "Advance USBNET" product, like Belkin/eTEK devices,
84 * from Ioannis Mavroukakis <i.mavroukakis@btinternet.com>;
85 * rx unlinks somehow weren't async; minor cleanup.
86 * 03-nov-2001 Merged GeneSys driver; original code from Jiun-Jie Huang
87 * <huangjj@genesyslogic.com.tw>, updated by Stanislav Brabec
88 * <utx@penguin.cz>. Made framing options (NetChip/GeneSys)
89 * tie mostly to (sub)driver info. Workaround some PL-2302
90 * chips that seem to reject SET_INTERFACE requests.
91 *
92 * 06-apr-2002 Added ethtool support, based on a patch from Brad Hards.
93 * Level of diagnostics is more configurable; they use device
94 * location (usb_device->devpath) instead of address (2.5).
95 * For tx_fixup, memflags can't be NOIO.
96 * 07-may-2002 Generalize/cleanup keventd support, handling rx stalls (mostly
97 * for USB 2.0 TTs) and memory shortages (potential) too. (db)
98 * Use "locally assigned" IEEE802 address space. (Brad Hards)
99 * 18-oct-2002 Support for Zaurus (Pavel Machek), related cleanup (db).
100 * 14-dec-2002 Remove Zaurus-private crc32 code (Pavel); 2.5 oops fix,
101 * cleanups and stubbed PXA-250 support (db), fix for framing
102 * issues on Z, net1080, and gl620a (Toby Milne)
103 *
104 * 31-mar-2003 Use endpoint descriptors: high speed support, simpler sa1100
105 * vs pxa25x, and CDC Ethernet. Throttle down log floods on
106 * disconnect; other cleanups. (db) Flush net1080 fifos
107 * after several sequential framing errors. (Johannes Erdfelt)
108 * 22-aug-2003 AX8817X support (Dave Hollis).
109 * 14-jun-2004 Trivial patch for AX8817X based Buffalo LUA-U2-KTX in Japan
110 * (Neil Bortnak)
111 * 03-nov-2004 Trivial patch for KC2190 (KC-190) chip. (Jonathan McDowell)
112 *
113 * 01-feb-2005 AX88772 support (Phil Chang & Dave Hollis)
114 *-------------------------------------------------------------------------*/
115
116// #define DEBUG // error path messages, extra info
117// #define VERBOSE // more; success messages
118
119#include <linux/config.h>
120#ifdef CONFIG_USB_DEBUG
121# define DEBUG
122#endif
123#include <linux/module.h>
124#include <linux/kmod.h>
125#include <linux/sched.h>
126#include <linux/init.h>
127#include <linux/netdevice.h>
128#include <linux/etherdevice.h>
1da177e4
LT		 129#include <linux/ethtool.h>
130#include <linux/workqueue.h>
131#include <linux/mii.h>
1da177e4 132#include <linux/usb.h>
1da177e4
LT		 133#include <linux/mm.h>
134#include <linux/dma-mapping.h>
135
f29fc259
DB		 136#include <asm/unaligned.h>
137
138#include "usbnet.h"
139
140#define DRIVER_VERSION "22-Aug-2005"
1da177e4
LT		 141
142
143/*-------------------------------------------------------------------------*/
144
145/*
146 * Nineteen USB 1.1 max size bulk transactions per frame (ms), max.
147 * Several dozen bytes of IPv4 data can fit in two such transactions.
148 * One maximum size Ethernet packet takes twenty four of them.
149 * For high speed, each frame comfortably fits almost 36 max size
150 * Ethernet packets (so queues should be bigger).
f29fc259
DB		 151 *
152 * REVISIT qlens should be members of 'struct usbnet'; the goal is to
153 * let the USB host controller be busy for 5msec or more before an irq
154 * is required, under load. Jumbograms change the equation.
1da177e4
LT		 155 */
156#define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
157#define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
158
f29fc259 159/* packets are always ethernet, sometimes wrapped in other framing */
1da177e4 160#define MIN_PACKET sizeof(struct ethhdr)
1da177e4
LT		 161
162// reawaken network queue this soon after stopping; else watchdog barks
163#define TX_TIMEOUT_JIFFIES (5*HZ)
164
165// throttle rx/tx briefly after some faults, so khubd might disconnect()
166// us (it polls at HZ/4 usually) before we report too many false errors.
167#define THROTTLE_JIFFIES (HZ/8)
168
169// for vendor-specific control operations
f29fc259 170#define CONTROL_TIMEOUT_MS USB_CTRL_GET_TIMEOUT
1da177e4
LT		 171
172// between wakeups
173#define UNLINK_TIMEOUT_MS 3
174
175/*-------------------------------------------------------------------------*/
176
177// randomly generated ethernet address
178static u8 node_id [ETH_ALEN];
179
1da177e4
LT		 180static const char driver_name [] = "usbnet";
181
182/* use ethtool to change the level for any given device */
183static int msg_level = -1;
184module_param (msg_level, int, 0);
185MODULE_PARM_DESC (msg_level, "Override default message level");
186
1da177e4
LT		 187/*-------------------------------------------------------------------------*/
188
189static void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
190static u32 usbnet_get_link (struct net_device *);
191static u32 usbnet_get_msglevel (struct net_device *);
192static void usbnet_set_msglevel (struct net_device *, u32);
7ea13c9c 193static void defer_kevent (struct usbnet *, int);
1da177e4
LT		 194
195/* mostly for PDA style devices, which are always connected if present */
196static int always_connected (struct usbnet *dev)
197{
198 return 0;
199}
200
201/* handles CDC Ethernet and many other network "bulk data" interfaces */
202static int
203get_endpoints (struct usbnet *dev, struct usb_interface *intf)
204{
205 int tmp;
206 struct usb_host_interface *alt = NULL;
207 struct usb_host_endpoint *in = NULL, *out = NULL;
208 struct usb_host_endpoint *status = NULL;
209
210 for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
211 unsigned ep;
212
213 in = out = status = NULL;
214 alt = intf->altsetting + tmp;
215
216 /* take the first altsetting with in-bulk + out-bulk;
217 * remember any status endpoint, just in case;
218 * ignore other endpoints and altsetttings.
219 */
220 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
221 struct usb_host_endpoint *e;
222 int intr = 0;
223
224 e = alt->endpoint + ep;
225 switch (e->desc.bmAttributes) {
226 case USB_ENDPOINT_XFER_INT:
227 if (!(e->desc.bEndpointAddress & USB_DIR_IN))
228 continue;
229 intr = 1;
230 /* FALLTHROUGH */
231 case USB_ENDPOINT_XFER_BULK:
232 break;
233 default:
234 continue;
235 }
236 if (e->desc.bEndpointAddress & USB_DIR_IN) {
237 if (!intr && !in)
238 in = e;
239 else if (intr && !status)
240 status = e;
241 } else {
242 if (!out)
243 out = e;
244 }
245 }
246 if (in && out)
247 break;
248 }
249 if (!alt || !in || !out)
250 return -EINVAL;
251
252 if (alt->desc.bAlternateSetting != 0
253 || !(dev->driver_info->flags & FLAG_NO_SETINT)) {
254 tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber,
255 alt->desc.bAlternateSetting);
256 if (tmp < 0)
257 return tmp;
258 }
259
260 dev->in = usb_rcvbulkpipe (dev->udev,
261 in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
262 dev->out = usb_sndbulkpipe (dev->udev,
263 out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
264 dev->status = status;
265 return 0;
266}
267
268static void intr_complete (struct urb *urb, struct pt_regs *regs);
269
270static int init_status (struct usbnet *dev, struct usb_interface *intf)
271{
272 char *buf = NULL;
273 unsigned pipe = 0;
274 unsigned maxp;
275 unsigned period;
276
277 if (!dev->driver_info->status)
278 return 0;
279
280 pipe = usb_rcvintpipe (dev->udev,
281 dev->status->desc.bEndpointAddress
282 & USB_ENDPOINT_NUMBER_MASK);
283 maxp = usb_maxpacket (dev->udev, pipe, 0);
284
285 /* avoid 1 msec chatter: min 8 msec poll rate */
286 period = max ((int) dev->status->desc.bInterval,
287 (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3);
288
289 buf = kmalloc (maxp, SLAB_KERNEL);
290 if (buf) {
291 dev->interrupt = usb_alloc_urb (0, SLAB_KERNEL);
292 if (!dev->interrupt) {
293 kfree (buf);
294 return -ENOMEM;
295 } else {
296 usb_fill_int_urb(dev->interrupt, dev->udev, pipe,
297 buf, maxp, intr_complete, dev, period);
298 dev_dbg(&intf->dev,
299 "status ep%din, %d bytes period %d\n",
300 usb_pipeendpoint(pipe), maxp, period);
301 }
302 }
303 return 0;
304}
305
306static void skb_return (struct usbnet *dev, struct sk_buff *skb)
307{
308 int status;
309
310 skb->dev = dev->net;
311 skb->protocol = eth_type_trans (skb, dev->net);
312 dev->stats.rx_packets++;
313 dev->stats.rx_bytes += skb->len;
314
315 if (netif_msg_rx_status (dev))
5330e927 316 devdbg (dev, "< rx, len %zu, type 0x%x",
1da177e4
LT		 317 skb->len + sizeof (struct ethhdr), skb->protocol);
318 memset (skb->cb, 0, sizeof (struct skb_data));
319 status = netif_rx (skb);
320 if (status != NET_RX_SUCCESS && netif_msg_rx_err (dev))
321 devdbg (dev, "netif_rx status %d", status);
322}
323
324\f
325#ifdef CONFIG_USB_ALI_M5632
326#define HAVE_HARDWARE
327
328/*-------------------------------------------------------------------------
329 *
330 * ALi M5632 driver ... does high speed
331 *
332 *-------------------------------------------------------------------------*/
333
334static const struct driver_info ali_m5632_info = {
335 .description = "ALi M5632",
336};
337
338
339#endif
340
341\f
342#ifdef CONFIG_USB_AN2720
343#define HAVE_HARDWARE
344
345/*-------------------------------------------------------------------------
346 *
347 * AnchorChips 2720 driver ... http://www.cypress.com
348 *
349 * This doesn't seem to have a way to detect whether the peer is
350 * connected, or need any reset handshaking. It's got pretty big
351 * internal buffers (handles most of a frame's worth of data).
352 * Chip data sheets don't describe any vendor control messages.
353 *
354 *-------------------------------------------------------------------------*/
355
356static const struct driver_info an2720_info = {
357 .description = "AnchorChips/Cypress 2720",
358 // no reset available!
359 // no check_connect available!
360
361 .in = 2, .out = 2, // direction distinguishes these
362};
363
364#endif /* CONFIG_USB_AN2720 */
365
366\f
367#ifdef CONFIG_USB_AX8817X
368/* ASIX AX8817X based USB 2.0 Ethernet Devices */
369
370#define HAVE_HARDWARE
371#define NEED_MII
372
373#include <linux/crc32.h>
374
375#define AX_CMD_SET_SW_MII 0x06
376#define AX_CMD_READ_MII_REG 0x07
377#define AX_CMD_WRITE_MII_REG 0x08
378#define AX_CMD_SET_HW_MII 0x0a
379#define AX_CMD_READ_EEPROM 0x0b
380#define AX_CMD_WRITE_EEPROM 0x0c
381#define AX_CMD_WRITE_ENABLE 0x0d
382#define AX_CMD_WRITE_DISABLE 0x0e
383#define AX_CMD_WRITE_RX_CTL 0x10
384#define AX_CMD_READ_IPG012 0x11
385#define AX_CMD_WRITE_IPG0 0x12
386#define AX_CMD_WRITE_IPG1 0x13
387#define AX_CMD_WRITE_IPG2 0x14
388#define AX_CMD_WRITE_MULTI_FILTER 0x16
389#define AX_CMD_READ_NODE_ID 0x17
390#define AX_CMD_READ_PHY_ID 0x19
7ea13c9c 391#define AX_CMD_READ_MEDIUM_STATUS 0x1a
1da177e4
LT		 392#define AX_CMD_WRITE_MEDIUM_MODE 0x1b
393#define AX_CMD_READ_MONITOR_MODE 0x1c
394#define AX_CMD_WRITE_MONITOR_MODE 0x1d
395#define AX_CMD_WRITE_GPIOS 0x1f
396#define AX_CMD_SW_RESET 0x20
397#define AX_CMD_SW_PHY_STATUS 0x21
398#define AX_CMD_SW_PHY_SELECT 0x22
399#define AX88772_CMD_READ_NODE_ID 0x13
400
401#define AX_MONITOR_MODE 0x01
402#define AX_MONITOR_LINK 0x02
403#define AX_MONITOR_MAGIC 0x04
404#define AX_MONITOR_HSFS 0x10
405
7ea13c9c
DH		 406/* AX88172 Medium Status Register values */
407#define AX_MEDIUM_FULL_DUPLEX 0x02
408#define AX_MEDIUM_TX_ABORT_ALLOW 0x04
409#define AX_MEDIUM_FLOW_CONTROL_EN 0x10
410
1da177e4
LT		 411#define AX_MCAST_FILTER_SIZE 8
412#define AX_MAX_MCAST 64
413
1da177e4
LT		 414#define AX_EEPROM_LEN 0x40
415
416#define AX_SWRESET_CLEAR 0x00
417#define AX_SWRESET_RR 0x01
418#define AX_SWRESET_RT 0x02
419#define AX_SWRESET_PRTE 0x04
420#define AX_SWRESET_PRL 0x08
421#define AX_SWRESET_BZ 0x10
422#define AX_SWRESET_IPRL 0x20
423#define AX_SWRESET_IPPD 0x40
424
425#define AX88772_IPG0_DEFAULT 0x15
426#define AX88772_IPG1_DEFAULT 0x0c
427#define AX88772_IPG2_DEFAULT 0x12
428
7ea13c9c
DH		 429#define AX88772_MEDIUM_FULL_DUPLEX 0x0002
430#define AX88772_MEDIUM_RESERVED 0x0004
431#define AX88772_MEDIUM_RX_FC_ENABLE 0x0010
432#define AX88772_MEDIUM_TX_FC_ENABLE 0x0020
433#define AX88772_MEDIUM_PAUSE_FORMAT 0x0080
434#define AX88772_MEDIUM_RX_ENABLE 0x0100
435#define AX88772_MEDIUM_100MB 0x0200
436#define AX88772_MEDIUM_DEFAULT \
437 (AX88772_MEDIUM_FULL_DUPLEX | AX88772_MEDIUM_RX_FC_ENABLE | \
438 AX88772_MEDIUM_TX_FC_ENABLE | AX88772_MEDIUM_100MB | \
439 AX88772_MEDIUM_RESERVED | AX88772_MEDIUM_RX_ENABLE )
440
1da177e4
LT		 441#define AX_EEPROM_MAGIC 0xdeadbeef
442
443/* This structure cannot exceed sizeof(unsigned long [5]) AKA 20 bytes */
444struct ax8817x_data {
445 u8 multi_filter[AX_MCAST_FILTER_SIZE];
1da177e4
LT		 446};
447
7ea13c9c
DH		 448struct ax88172_int_data {
449 u16 res1;
450 u8 link;
451 u16 res2;
452 u8 status;
453 u16 res3;
454} __attribute__ ((packed));
455
1da177e4
LT		 456static int ax8817x_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
457 u16 size, void *data)
458{
459 return usb_control_msg(
460 dev->udev,
461 usb_rcvctrlpipe(dev->udev, 0),
462 cmd,
463 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
464 value,
465 index,
466 data,
467 size,
468 CONTROL_TIMEOUT_MS);
469}
470
471static int ax8817x_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
472 u16 size, void *data)
473{
474 return usb_control_msg(
475 dev->udev,
476 usb_sndctrlpipe(dev->udev, 0),
477 cmd,
478 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
479 value,
480 index,
481 data,
482 size,
483 CONTROL_TIMEOUT_MS);
484}
485
486static void ax8817x_async_cmd_callback(struct urb *urb, struct pt_regs *regs)
487{
488 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
489
490 if (urb->status < 0)
491 printk(KERN_DEBUG "ax8817x_async_cmd_callback() failed with %d",
492 urb->status);
493
494 kfree(req);
495 usb_free_urb(urb);
496}
497
7ea13c9c 498static void ax8817x_status(struct usbnet *dev, struct urb *urb)
1da177e4 499{
7ea13c9c 500 struct ax88172_int_data *event;
1da177e4
LT		 501 int link;
502
7ea13c9c
DH		 503 if (urb->actual_length < 8)
504 return;
505
506 event = urb->transfer_buffer;
507 link = event->link & 0x01;
508 if (netif_carrier_ok(dev->net) != link) {
509 if (link) {
510 netif_carrier_on(dev->net);
511 defer_kevent (dev, EVENT_LINK_RESET );
512 } else
513 netif_carrier_off(dev->net);
514 devdbg(dev, "ax8817x - Link Status is: %d", link);
1da177e4
LT		 515 }
516}
517
518static void ax8817x_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
519 u16 size, void *data)
520{
521 struct usb_ctrlrequest *req;
522 int status;
523 struct urb *urb;
524
525 if ((urb = usb_alloc_urb(0, GFP_ATOMIC)) == NULL) {
526 devdbg(dev, "Error allocating URB in write_cmd_async!");
527 return;
528 }
529
530 if ((req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC)) == NULL) {
531 deverr(dev, "Failed to allocate memory for control request");
532 usb_free_urb(urb);
533 return;
534 }
535
536 req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
537 req->bRequest = cmd;
538 req->wValue = cpu_to_le16(value);
539 req->wIndex = cpu_to_le16(index);
540 req->wLength = cpu_to_le16(size);
541
542 usb_fill_control_urb(urb, dev->udev,
543 usb_sndctrlpipe(dev->udev, 0),
544 (void *)req, data, size,
545 ax8817x_async_cmd_callback, req);
546
547 if((status = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
548 deverr(dev, "Error submitting the control message: status=%d", status);
549 kfree(req);
550 usb_free_urb(urb);
551 }
552}
553
554static void ax8817x_set_multicast(struct net_device *net)
555{
556 struct usbnet *dev = netdev_priv(net);
557 struct ax8817x_data *data = (struct ax8817x_data *)&dev->data;
558 u8 rx_ctl = 0x8c;
559
560 if (net->flags & IFF_PROMISC) {
561 rx_ctl |= 0x01;
562 } else if (net->flags & IFF_ALLMULTI
563 || net->mc_count > AX_MAX_MCAST) {
564 rx_ctl |= 0x02;
565 } else if (net->mc_count == 0) {
566 /* just broadcast and directed */
567 } else {
568 /* We use the 20 byte dev->data
569 * for our 8 byte filter buffer
570 * to avoid allocating memory that
571 * is tricky to free later */
572 struct dev_mc_list *mc_list = net->mc_list;
573 u32 crc_bits;
574 int i;
575
576 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
577
578 /* Build the multicast hash filter. */
579 for (i = 0; i < net->mc_count; i++) {
580 crc_bits =
581 ether_crc(ETH_ALEN,
582 mc_list->dmi_addr) >> 26;
583 data->multi_filter[crc_bits >> 3] |=
584 1 << (crc_bits & 7);
585 mc_list = mc_list->next;
586 }
587
588 ax8817x_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
589 AX_MCAST_FILTER_SIZE, data->multi_filter);
590
591 rx_ctl |= 0x10;
592 }
593
594 ax8817x_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
595}
596
597static int ax8817x_mdio_read(struct net_device *netdev, int phy_id, int loc)
598{
599 struct usbnet *dev = netdev_priv(netdev);
600 u16 res;
601 u8 buf[1];
602
603 ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
604 ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res);
605 ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
606
607 return res & 0xffff;
608}
609
610static void ax8817x_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
611{
612 struct usbnet *dev = netdev_priv(netdev);
613 u16 res = val;
614 u8 buf[1];
615
616 ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
617 ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res);
618 ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
619}
620
7ea13c9c
DH		 621static int ax88172_link_reset(struct usbnet *dev)
622{
623 u16 lpa;
624 u8 mode;
625
626 mode = AX_MEDIUM_TX_ABORT_ALLOW | AX_MEDIUM_FLOW_CONTROL_EN;
627 lpa = ax8817x_mdio_read(dev->net, dev->mii.phy_id, MII_LPA);
628 if (lpa & LPA_DUPLEX)
629 mode |= AX_MEDIUM_FULL_DUPLEX;
630 ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
631
632 return 0;
633}
634
1da177e4
LT		 635static void ax8817x_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
636{
637 struct usbnet *dev = netdev_priv(net);
638 u8 opt;
639
640 if (ax8817x_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
641 wolinfo->supported = 0;
642 wolinfo->wolopts = 0;
643 return;
644 }
645 wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
646 wolinfo->wolopts = 0;
647 if (opt & AX_MONITOR_MODE) {
648 if (opt & AX_MONITOR_LINK)
649 wolinfo->wolopts |= WAKE_PHY;
650 if (opt & AX_MONITOR_MAGIC)
651 wolinfo->wolopts |= WAKE_MAGIC;
652 }
653}
654
655static int ax8817x_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
656{
657 struct usbnet *dev = netdev_priv(net);
658 u8 opt = 0;
659 u8 buf[1];
660
661 if (wolinfo->wolopts & WAKE_PHY)
662 opt |= AX_MONITOR_LINK;
663 if (wolinfo->wolopts & WAKE_MAGIC)
664 opt |= AX_MONITOR_MAGIC;
665 if (opt != 0)
666 opt |= AX_MONITOR_MODE;
667
668 if (ax8817x_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
669 opt, 0, 0, &buf) < 0)
670 return -EINVAL;
671
672 return 0;
673}
674
675static int ax8817x_get_eeprom_len(struct net_device *net)
676{
677 return AX_EEPROM_LEN;
678}
679
680static int ax8817x_get_eeprom(struct net_device *net,
681 struct ethtool_eeprom *eeprom, u8 *data)
682{
683 struct usbnet *dev = netdev_priv(net);
684 u16 *ebuf = (u16 *)data;
685 int i;
686
687 /* Crude hack to ensure that we don't overwrite memory
688 * if an odd length is supplied
689 */
690 if (eeprom->len % 2)
691 return -EINVAL;
692
693 eeprom->magic = AX_EEPROM_MAGIC;
694
695 /* ax8817x returns 2 bytes from eeprom on read */
696 for (i=0; i < eeprom->len / 2; i++) {
697 if (ax8817x_read_cmd(dev, AX_CMD_READ_EEPROM,
698 eeprom->offset + i, 0, 2, &ebuf[i]) < 0)
699 return -EINVAL;
700 }
701 return 0;
702}
703
704static void ax8817x_get_drvinfo (struct net_device *net,
705 struct ethtool_drvinfo *info)
706{
707 /* Inherit standard device info */
708 usbnet_get_drvinfo(net, info);
709 info->eedump_len = 0x3e;
710}
711
712static int ax8817x_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
713{
714 struct usbnet *dev = netdev_priv(net);
715
716 return mii_ethtool_gset(&dev->mii,cmd);
717}
718
719static int ax8817x_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
720{
721 struct usbnet *dev = netdev_priv(net);
722
723 return mii_ethtool_sset(&dev->mii,cmd);
724}
725
726/* We need to override some ethtool_ops so we require our
727 own structure so we don't interfere with other usbnet
728 devices that may be connected at the same time. */
729static struct ethtool_ops ax8817x_ethtool_ops = {
730 .get_drvinfo = ax8817x_get_drvinfo,
731 .get_link = ethtool_op_get_link,
732 .get_msglevel = usbnet_get_msglevel,
733 .set_msglevel = usbnet_set_msglevel,
734 .get_wol = ax8817x_get_wol,
735 .set_wol = ax8817x_set_wol,
736 .get_eeprom_len = ax8817x_get_eeprom_len,
737 .get_eeprom = ax8817x_get_eeprom,
738 .get_settings = ax8817x_get_settings,
739 .set_settings = ax8817x_set_settings,
740};
741
742static int ax8817x_bind(struct usbnet *dev, struct usb_interface *intf)
743{
744 int ret = 0;
745 void *buf;
746 int i;
747 unsigned long gpio_bits = dev->driver_info->data;
1da177e4
LT		 748
749 get_endpoints(dev,intf);
750
1da177e4
LT		 751 buf = kmalloc(ETH_ALEN, GFP_KERNEL);
752 if(!buf) {
753 ret = -ENOMEM;
7ea13c9c 754 goto out1;
1da177e4
LT		 755 }
756
757 /* Toggle the GPIOs in a manufacturer/model specific way */
758 for (i = 2; i >= 0; i--) {
759 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
760 (gpio_bits >> (i * 8)) & 0xff, 0, 0,
761 buf)) < 0)
7ea13c9c 762 goto out2;
1da177e4
LT		 763 msleep(5);
764 }
765
766 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x80, 0, 0, buf)) < 0) {
767 dbg("send AX_CMD_WRITE_RX_CTL failed: %d", ret);
7ea13c9c 768 goto out2;
1da177e4
LT		 769 }
770
771 /* Get the MAC address */
772 memset(buf, 0, ETH_ALEN);
773 if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, 6, buf)) < 0) {
774 dbg("read AX_CMD_READ_NODE_ID failed: %d", ret);
7ea13c9c 775 goto out2;
1da177e4
LT		 776 }
777 memcpy(dev->net->dev_addr, buf, ETH_ALEN);
778
779 /* Get the PHY id */
780 if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf)) < 0) {
781 dbg("error on read AX_CMD_READ_PHY_ID: %02x", ret);
7ea13c9c 782 goto out2;
1da177e4
LT		 783 } else if (ret < 2) {
784 /* this should always return 2 bytes */
785 dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x", ret);
786 ret = -EIO;
7ea13c9c 787 goto out2;
1da177e4
LT		 788 }
789
790 /* Initialize MII structure */
791 dev->mii.dev = dev->net;
792 dev->mii.mdio_read = ax8817x_mdio_read;
793 dev->mii.mdio_write = ax8817x_mdio_write;
794 dev->mii.phy_id_mask = 0x3f;
795 dev->mii.reg_num_mask = 0x1f;
796 dev->mii.phy_id = *((u8 *)buf + 1);
797
798 dev->net->set_multicast_list = ax8817x_set_multicast;
799 dev->net->ethtool_ops = &ax8817x_ethtool_ops;
800
7ea13c9c 801 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1da177e4 802 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
7ea13c9c 803 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
1da177e4
LT		 804 mii_nway_restart(&dev->mii);
805
f29fc259
DB		 806 if (dev->driver_info->flags & FLAG_FRAMING_AX) {
807 /* REVISIT: adjust hard_header_len too */
808 dev->hard_mtu = 2048;
809 }
810
1da177e4 811 return 0;
1da177e4 812out2:
7ea13c9c 813 kfree(buf);
1da177e4 814out1:
1da177e4
LT		 815 return ret;
816}
817
1da177e4
LT		 818static struct ethtool_ops ax88772_ethtool_ops = {
819 .get_drvinfo = ax8817x_get_drvinfo,
820 .get_link = ethtool_op_get_link,
821 .get_msglevel = usbnet_get_msglevel,
822 .set_msglevel = usbnet_set_msglevel,
823 .get_wol = ax8817x_get_wol,
824 .set_wol = ax8817x_set_wol,
825 .get_eeprom_len = ax8817x_get_eeprom_len,
826 .get_eeprom = ax8817x_get_eeprom,
827 .get_settings = ax8817x_get_settings,
828 .set_settings = ax8817x_set_settings,
829};
830
831static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
832{
833 int ret;
834 void *buf;
1da177e4
LT		 835
836 get_endpoints(dev,intf);
837
1da177e4
LT		 838 buf = kmalloc(6, GFP_KERNEL);
839 if(!buf) {
840 dbg ("Cannot allocate memory for buffer");
841 ret = -ENOMEM;
7ea13c9c 842 goto out1;
1da177e4
LT		 843 }
844
845 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
846 0x00B0, 0, 0, buf)) < 0)
7ea13c9c 847 goto out2;
1da177e4
LT		 848
849 msleep(5);
850 if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_PHY_SELECT, 0x0001, 0, 0, buf)) < 0) {
851 dbg("Select PHY #1 failed: %d", ret);
7ea13c9c 852 goto out2;
1da177e4
LT		 853 }
854
855 if ((ret =
856 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPPD, 0, 0, buf)) < 0) {
857 dbg("Failed to power down internal PHY: %d", ret);
7ea13c9c 858 goto out2;
1da177e4
LT		 859 }
860
861 msleep(150);
862 if ((ret =
863 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_CLEAR, 0, 0, buf)) < 0) {
864 dbg("Failed to perform software reset: %d", ret);
7ea13c9c 865 goto out2;
1da177e4
LT		 866 }
867
868 msleep(150);
869 if ((ret =
870 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPRL | AX_SWRESET_PRL, 0, 0, buf)) < 0) {
871 dbg("Failed to set Internal/External PHY reset control: %d", ret);
7ea13c9c 872 goto out2;
1da177e4
LT		 873 }
874
875 msleep(150);
876 if ((ret =
877 ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x0000, 0, 0,
878 buf)) < 0) {
879 dbg("Failed to reset RX_CTL: %d", ret);
7ea13c9c 880 goto out2;
1da177e4
LT		 881 }
882
883 /* Get the MAC address */
884 memset(buf, 0, ETH_ALEN);
885 if ((ret = ax8817x_read_cmd(dev, AX88772_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf)) < 0) {
886 dbg("Failed to read MAC address: %d", ret);
7ea13c9c 887 goto out2;
1da177e4
LT		 888 }
889 memcpy(dev->net->dev_addr, buf, ETH_ALEN);
890
891 if ((ret = ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, buf)) < 0) {
892 dbg("Enabling software MII failed: %d", ret);
7ea13c9c 893 goto out2;
1da177e4
LT		 894 }
895
896 if (((ret =
897 ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG, 0x0010, 2, 2, buf)) < 0)
898 || (*((u16 *)buf) != 0x003b)) {
899 dbg("Read PHY register 2 must be 0x3b00: %d", ret);
7ea13c9c 900 goto out2;
1da177e4
LT		 901 }
902
903 /* Initialize MII structure */
904 dev->mii.dev = dev->net;
905 dev->mii.mdio_read = ax8817x_mdio_read;
906 dev->mii.mdio_write = ax8817x_mdio_write;
907 dev->mii.phy_id_mask = 0xff;
908 dev->mii.reg_num_mask = 0xff;
909
910 /* Get the PHY id */
911 if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf)) < 0) {
912 dbg("Error reading PHY ID: %02x", ret);
7ea13c9c 913 goto out2;
1da177e4
LT		 914 } else if (ret < 2) {
915 /* this should always return 2 bytes */
916 dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x",
917 ret);
918 ret = -EIO;
7ea13c9c 919 goto out2;
1da177e4
LT		 920 }
921 dev->mii.phy_id = *((u8 *)buf + 1);
922
923 if ((ret =
924 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_PRL, 0, 0, buf)) < 0) {
925 dbg("Set external PHY reset pin level: %d", ret);
7ea13c9c 926 goto out2;
1da177e4
LT		 927 }
928 msleep(150);
929 if ((ret =
930 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPRL | AX_SWRESET_PRL, 0, 0, buf)) < 0) {
931 dbg("Set Internal/External PHY reset control: %d", ret);
7ea13c9c 932 goto out2;
1da177e4
LT		 933 }
934 msleep(150);
935
936
937 dev->net->set_multicast_list = ax8817x_set_multicast;
938 dev->net->ethtool_ops = &ax88772_ethtool_ops;
939
7ea13c9c 940 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1da177e4 941 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
7ea13c9c 942 ADVERTISE_ALL | ADVERTISE_CSMA);
1da177e4
LT		 943 mii_nway_restart(&dev->mii);
944
7ea13c9c 945 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, AX88772_MEDIUM_DEFAULT, 0, 0, buf)) < 0) {
1da177e4 946 dbg("Write medium mode register: %d", ret);
7ea13c9c 947 goto out2;
1da177e4
LT		 948 }
949
950 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_IPG0, AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,AX88772_IPG2_DEFAULT, 0, buf)) < 0) {
951 dbg("Write IPG,IPG1,IPG2 failed: %d", ret);
7ea13c9c 952 goto out2;
1da177e4
LT		 953 }
954 if ((ret =
955 ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf)) < 0) {
956 dbg("Failed to set hardware MII: %02x", ret);
7ea13c9c 957 goto out2;
1da177e4
LT		 958 }
959
960 /* Set RX_CTL to default values with 2k buffer, and enable cactus */
961 if ((ret =
962 ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x0088, 0, 0,
963 buf)) < 0) {
964 dbg("Reset RX_CTL failed: %d", ret);
7ea13c9c 965 goto out2;
1da177e4
LT		 966 }
967
968 kfree(buf);
969
970 return 0;
971
1da177e4 972out2:
7ea13c9c 973 kfree(buf);
1da177e4 974out1:
1da177e4
LT		 975 return ret;
976}
977
978static int ax88772_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
979{
980 u32 *header;
981 char *packet;
982 struct sk_buff *ax_skb;
983 u16 size;
984
985 header = (u32 *) skb->data;
986 le32_to_cpus(header);
987 packet = (char *)(header + 1);
988
989 skb_pull(skb, 4);
990
991 while (skb->len > 0) {
992 if ((short)(*header & 0x0000ffff) !=
993 ~((short)((*header & 0xffff0000) >> 16))) {
994 devdbg(dev,"header length data is error");
995 }
996 /* get the packet length */
997 size = (u16) (*header & 0x0000ffff);
998
999 if ((skb->len) - ((size + 1) & 0xfffe) == 0)
1000 return 2;
1001 if (size > ETH_FRAME_LEN) {
1002 devdbg(dev,"invalid rx length %d", size);
1003 return 0;
1004 }
1005 ax_skb = skb_clone(skb, GFP_ATOMIC);
1006 if (ax_skb) {
1007 ax_skb->len = size;
1008 ax_skb->data = packet;
1009 ax_skb->tail = packet + size;
1010 skb_return(dev, ax_skb);
1011 } else {
1012 return 0;
1013 }
1014
1015 skb_pull(skb, (size + 1) & 0xfffe);
1016
1017 if (skb->len == 0)
1018 break;
1019
1020 header = (u32 *) skb->data;
1021 le32_to_cpus(header);
1022 packet = (char *)(header + 1);
1023 skb_pull(skb, 4);
1024 }
1025
1026 if (skb->len < 0) {
1027 devdbg(dev,"invalid rx length %d", skb->len);
1028 return 0;
1029 }
1030 return 1;
1031}
1032
1033static struct sk_buff *ax88772_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
0d9899f8 1034 unsigned flags)
1da177e4
LT		 1035{
1036 int padlen;
1037 int headroom = skb_headroom(skb);
1038 int tailroom = skb_tailroom(skb);
1039 u32 *packet_len;
1040 u32 *padbytes_ptr;
1041
1042 padlen = ((skb->len + 4) % 512) ? 0 : 4;
1043
1044 if ((!skb_cloned(skb))
1045 && ((headroom + tailroom) >= (4 + padlen))) {
1046 if ((headroom < 4) || (tailroom < padlen)) {
1047 skb->data = memmove(skb->head + 4, skb->data, skb->len);
1048 skb->tail = skb->data + skb->len;
1049 }
1050 } else {
1051 struct sk_buff *skb2;
1052 skb2 = skb_copy_expand(skb, 4, padlen, flags);
1053 dev_kfree_skb_any(skb);
1054 skb = skb2;
1055 if (!skb)
1056 return NULL;
1057 }
1058
1059 packet_len = (u32 *) skb_push(skb, 4);
1060
1061 packet_len = (u32 *) skb->data;
1062 *packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
1063
1064 if ((skb->len % 512) == 0) {
1065 padbytes_ptr = (u32 *) skb->tail;
1066 *padbytes_ptr = 0xffff0000;
1067 skb_put(skb, padlen);
1068 }
1069 return skb;
1070}
1071
7ea13c9c
DH		 1072static int ax88772_link_reset(struct usbnet *dev)
1073{
1074 u16 lpa;
1075 u16 mode;
1076
1077 mode = AX88772_MEDIUM_DEFAULT;
1078 lpa = ax8817x_mdio_read(dev->net, dev->mii.phy_id, MII_LPA);
1079
1080 if ((lpa & LPA_DUPLEX) == 0)
1081 mode &= ~AX88772_MEDIUM_FULL_DUPLEX;
1082 if ((lpa & LPA_100) == 0)
1083 mode &= ~AX88772_MEDIUM_100MB;
1084 ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
1085
1086 return 0;
1087}
1088
1da177e4
LT		 1089static const struct driver_info ax8817x_info = {
1090 .description = "ASIX AX8817x USB 2.0 Ethernet",
1091 .bind = ax8817x_bind,
7ea13c9c
DH		 1092 .status = ax8817x_status,
1093 .link_reset = ax88172_link_reset,
1094 .reset = ax88172_link_reset,
1da177e4
LT		 1095 .flags = FLAG_ETHER,
1096 .data = 0x00130103,
1097};
1098
1099static const struct driver_info dlink_dub_e100_info = {
1100 .description = "DLink DUB-E100 USB Ethernet",
1101 .bind = ax8817x_bind,
7ea13c9c
DH		 1102 .status = ax8817x_status,
1103 .link_reset = ax88172_link_reset,
1104 .reset = ax88172_link_reset,
1da177e4
LT		 1105 .flags = FLAG_ETHER,
1106 .data = 0x009f9d9f,
1107};
1108
1109static const struct driver_info netgear_fa120_info = {
1110 .description = "Netgear FA-120 USB Ethernet",
1111 .bind = ax8817x_bind,
7ea13c9c
DH		 1112 .status = ax8817x_status,
1113 .link_reset = ax88172_link_reset,
1114 .reset = ax88172_link_reset,
1da177e4
LT		 1115 .flags = FLAG_ETHER,
1116 .data = 0x00130103,
1117};
1118
1119static const struct driver_info hawking_uf200_info = {
1120 .description = "Hawking UF200 USB Ethernet",
1121 .bind = ax8817x_bind,
7ea13c9c
DH		 1122 .status = ax8817x_status,
1123 .link_reset = ax88172_link_reset,
1124 .reset = ax88172_link_reset,
1da177e4
LT		 1125 .flags = FLAG_ETHER,
1126 .data = 0x001f1d1f,
1127};
1128
1129static const struct driver_info ax88772_info = {
1130 .description = "ASIX AX88772 USB 2.0 Ethernet",
1131 .bind = ax88772_bind,
7ea13c9c
DH		 1132 .status = ax8817x_status,
1133 .link_reset = ax88772_link_reset,
1134 .reset = ax88772_link_reset,
1da177e4
LT		 1135 .flags = FLAG_ETHER | FLAG_FRAMING_AX,
1136 .rx_fixup = ax88772_rx_fixup,
1137 .tx_fixup = ax88772_tx_fixup,
1138 .data = 0x00130103,
1139};
1140
1141#endif /* CONFIG_USB_AX8817X */
1142
1143
1144\f
1145#ifdef CONFIG_USB_BELKIN
1146#define HAVE_HARDWARE
1147
1148/*-------------------------------------------------------------------------
1149 *
1150 * Belkin F5U104 ... two NetChip 2280 devices + Atmel microcontroller
1151 *
1152 * ... also two eTEK designs, including one sold as "Advance USBNET"
1153 *
1154 *-------------------------------------------------------------------------*/
1155
1156static const struct driver_info belkin_info = {
1157 .description = "Belkin, eTEK, or compatible",
1158};
1159
1160#endif /* CONFIG_USB_BELKIN */
1161
1162
1163\f
1164/*-------------------------------------------------------------------------
1165 *
1166 * Communications Device Class declarations.
1167 * Used by CDC Ethernet, and some CDC variants
1168 *
1169 *-------------------------------------------------------------------------*/
1170
1171#ifdef CONFIG_USB_CDCETHER
1172#define NEED_GENERIC_CDC
1173#endif
1174
1175#ifdef CONFIG_USB_ZAURUS
1176/* Ethernet variant uses funky framing, broken ethernet addressing */
1177#define NEED_GENERIC_CDC
1178#endif
1179
1180#ifdef CONFIG_USB_RNDIS
1181/* ACM variant uses even funkier framing, complex control RPC scheme */
1182#define NEED_GENERIC_CDC
1183#endif
1184
1185
1186#ifdef NEED_GENERIC_CDC
1187
1188#include <linux/usb_cdc.h>
1189
1190struct cdc_state {
1191 struct usb_cdc_header_desc *header;
1192 struct usb_cdc_union_desc *u;
1193 struct usb_cdc_ether_desc *ether;
1194 struct usb_interface *control;
1195 struct usb_interface *data;
1196};
1197
1198static struct usb_driver usbnet_driver;
1199
1200/*
1201 * probes control interface, claims data interface, collects the bulk
1202 * endpoints, activates data interface (if needed), maybe sets MTU.
1203 * all pure cdc, except for certain firmware workarounds.
1204 */
1205static int generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf)
1206{
1207 u8 *buf = intf->cur_altsetting->extra;
1208 int len = intf->cur_altsetting->extralen;
1209 struct usb_interface_descriptor *d;
1210 struct cdc_state *info = (void *) &dev->data;
1211 int status;
1212 int rndis;
1213
1214 if (sizeof dev->data < sizeof *info)
1215 return -EDOM;
1216
1217 /* expect strict spec conformance for the descriptors, but
1218 * cope with firmware which stores them in the wrong place
1219 */
1220 if (len == 0 && dev->udev->actconfig->extralen) {
1221 /* Motorola SB4100 (and others: Brad Hards says it's
1222 * from a Broadcom design) put CDC descriptors here
1223 */
1224 buf = dev->udev->actconfig->extra;
1225 len = dev->udev->actconfig->extralen;
1226 if (len)
1227 dev_dbg (&intf->dev,
1228 "CDC descriptors on config\n");
1229 }
1230
1231 /* this assumes that if there's a non-RNDIS vendor variant
1232 * of cdc-acm, it'll fail RNDIS requests cleanly.
1233 */
1234 rndis = (intf->cur_altsetting->desc.bInterfaceProtocol == 0xff);
1235
1236 memset (info, 0, sizeof *info);
1237 info->control = intf;
1238 while (len > 3) {
1239 if (buf [1] != USB_DT_CS_INTERFACE)
1240 goto next_desc;
1241
1242 /* use bDescriptorSubType to identify the CDC descriptors.
1243 * We expect devices with CDC header and union descriptors.
1244 * For CDC Ethernet we need the ethernet descriptor.
1245 * For RNDIS, ignore two (pointless) CDC modem descriptors
1246 * in favor of a complicated OID-based RPC scheme doing what
1247 * CDC Ethernet achieves with a simple descriptor.
1248 */
1249 switch (buf [2]) {
1250 case USB_CDC_HEADER_TYPE:
1251 if (info->header) {
1252 dev_dbg (&intf->dev, "extra CDC header\n");
1253 goto bad_desc;
1254 }
1255 info->header = (void *) buf;
1256 if (info->header->bLength != sizeof *info->header) {
1257 dev_dbg (&intf->dev, "CDC header len %u\n",
1258 info->header->bLength);
1259 goto bad_desc;
1260 }
1261 break;
1262 case USB_CDC_UNION_TYPE:
1263 if (info->u) {
1264 dev_dbg (&intf->dev, "extra CDC union\n");
1265 goto bad_desc;
1266 }
1267 info->u = (void *) buf;
1268 if (info->u->bLength != sizeof *info->u) {
1269 dev_dbg (&intf->dev, "CDC union len %u\n",
1270 info->u->bLength);
1271 goto bad_desc;
1272 }
1273
1274 /* we need a master/control interface (what we're
1275 * probed with) and a slave/data interface; union
1276 * descriptors sort this all out.
1277 */
1278 info->control = usb_ifnum_to_if(dev->udev,
1279 info->u->bMasterInterface0);
1280 info->data = usb_ifnum_to_if(dev->udev,
1281 info->u->bSlaveInterface0);
1282 if (!info->control || !info->data) {
1283 dev_dbg (&intf->dev,
1284 "master #%u/%p slave #%u/%p\n",
1285 info->u->bMasterInterface0,
1286 info->control,
1287 info->u->bSlaveInterface0,
1288 info->data);
1289 goto bad_desc;
1290 }
1291 if (info->control != intf) {
1292 dev_dbg (&intf->dev, "bogus CDC Union\n");
1293 /* Ambit USB Cable Modem (and maybe others)
1294 * interchanges master and slave interface.
1295 */
1296 if (info->data == intf) {
1297 info->data = info->control;
1298 info->control = intf;
1299 } else
1300 goto bad_desc;
1301 }
1302
1303 /* a data interface altsetting does the real i/o */
1304 d = &info->data->cur_altsetting->desc;
1305 if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
1306 dev_dbg (&intf->dev, "slave class %u\n",
1307 d->bInterfaceClass);
1308 goto bad_desc;
1309 }
1310 break;
1311 case USB_CDC_ETHERNET_TYPE:
1312 if (info->ether) {
1313 dev_dbg (&intf->dev, "extra CDC ether\n");
1314 goto bad_desc;
1315 }
1316 info->ether = (void *) buf;
1317 if (info->ether->bLength != sizeof *info->ether) {
1318 dev_dbg (&intf->dev, "CDC ether len %u\n",
e3bc8b4e 1319 info->ether->bLength);
1da177e4
LT		 1320 goto bad_desc;
1321 }
f29fc259
DB		 1322 dev->hard_mtu = le16_to_cpu(
1323 info->ether->wMaxSegmentSize);
1da177e4
LT		 1324 /* because of Zaurus, we may be ignoring the host
1325 * side link address we were given.
1326 */
1327 break;
1328 }
1329next_desc:
1330 len -= buf [0]; /* bLength */
1331 buf += buf [0];
1332 }
1333
1334 if (!info->header || !info->u || (!rndis && !info->ether)) {
1335 dev_dbg (&intf->dev, "missing cdc %s%s%sdescriptor\n",
1336 info->header ? "" : "header ",
1337 info->u ? "" : "union ",
1338 info->ether ? "" : "ether ");
1339 goto bad_desc;
1340 }
1341
1342 /* claim data interface and set it up ... with side effects.
1343 * network traffic can't flow until an altsetting is enabled.
1344 */
1345 status = usb_driver_claim_interface (&usbnet_driver, info->data, dev);
1346 if (status < 0)
1347 return status;
1348 status = get_endpoints (dev, info->data);
1349 if (status < 0) {
1350 /* ensure immediate exit from usbnet_disconnect */
1351 usb_set_intfdata(info->data, NULL);
1352 usb_driver_release_interface (&usbnet_driver, info->data);
1353 return status;
1354 }
1355
1356 /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
1357 dev->status = NULL;
1358 if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
1359 struct usb_endpoint_descriptor *desc;
1360
1361 dev->status = &info->control->cur_altsetting->endpoint [0];
1362 desc = &dev->status->desc;
1363 if (desc->bmAttributes != USB_ENDPOINT_XFER_INT
1364 || !(desc->bEndpointAddress & USB_DIR_IN)
1365 || (le16_to_cpu(desc->wMaxPacketSize)
1366 < sizeof (struct usb_cdc_notification))
1367 || !desc->bInterval) {
1368 dev_dbg (&intf->dev, "bad notification endpoint\n");
1369 dev->status = NULL;
1370 }
1371 }
1372 if (rndis && !dev->status) {
1373 dev_dbg (&intf->dev, "missing RNDIS status endpoint\n");
1374 usb_set_intfdata(info->data, NULL);
1375 usb_driver_release_interface (&usbnet_driver, info->data);
1376 return -ENODEV;
1377 }
1378 return 0;
1379
1380bad_desc:
1381 dev_info (&dev->udev->dev, "bad CDC descriptors\n");
1382 return -ENODEV;
1383}
1384
1385static void cdc_unbind (struct usbnet *dev, struct usb_interface *intf)
1386{
1387 struct cdc_state *info = (void *) &dev->data;
1388
1389 /* disconnect master --> disconnect slave */
1390 if (intf == info->control && info->data) {
1391 /* ensure immediate exit from usbnet_disconnect */
1392 usb_set_intfdata(info->data, NULL);
1393 usb_driver_release_interface (&usbnet_driver, info->data);
1394 info->data = NULL;
1395 }
1396
1397 /* and vice versa (just in case) */
1398 else if (intf == info->data && info->control) {
1399 /* ensure immediate exit from usbnet_disconnect */
1400 usb_set_intfdata(info->control, NULL);
1401 usb_driver_release_interface (&usbnet_driver, info->control);
1402 info->control = NULL;
1403 }
1404}
1405
80615f81
DB		 1406#endif /* NEED_GENERIC_CDC */
1407
1408\f
1409#ifdef CONFIG_USB_CDCETHER
1410#define HAVE_HARDWARE
1411
1412/*-------------------------------------------------------------------------
1413 *
1414 * Communications Device Class, Ethernet Control model
1415 *
1416 * Takes two interfaces. The DATA interface is inactive till an altsetting
1417 * is selected. Configuration data includes class descriptors.
1418 *
1419 * This should interop with whatever the 2.4 "CDCEther.c" driver
1420 * (by Brad Hards) talked with.
1421 *
1422 *-------------------------------------------------------------------------*/
1423
1424#include <linux/ctype.h>
1425
1da177e4
LT		 1426
1427static void dumpspeed (struct usbnet *dev, __le32 *speeds)
1428{
1429 if (netif_msg_timer (dev))
1430 devinfo (dev, "link speeds: %u kbps up, %u kbps down",
1431 __le32_to_cpu(speeds[0]) / 1000,
1432 __le32_to_cpu(speeds[1]) / 1000);
1433}
1434
1435static void cdc_status (struct usbnet *dev, struct urb *urb)
1436{
1437 struct usb_cdc_notification *event;
1438
1439 if (urb->actual_length < sizeof *event)
1440 return;
1441
1442 /* SPEED_CHANGE can get split into two 8-byte packets */
1443 if (test_and_clear_bit (EVENT_STS_SPLIT, &dev->flags)) {
1444 dumpspeed (dev, (__le32 *) urb->transfer_buffer);
1445 return;
1446 }
1447
1448 event = urb->transfer_buffer;
1449 switch (event->bNotificationType) {
1450 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1451 if (netif_msg_timer (dev))
1452 devdbg (dev, "CDC: carrier %s",
1453 event->wValue ? "on" : "off");
1454 if (event->wValue)
1455 netif_carrier_on(dev->net);
1456 else
1457 netif_carrier_off(dev->net);
1458 break;
1459 case USB_CDC_NOTIFY_SPEED_CHANGE: /* tx/rx rates */
1460 if (netif_msg_timer (dev))
1461 devdbg (dev, "CDC: speed change (len %d)",
1462 urb->actual_length);
1463 if (urb->actual_length != (sizeof *event + 8))
1464 set_bit (EVENT_STS_SPLIT, &dev->flags);
1465 else
1466 dumpspeed (dev, (__le32 *) &event[1]);
1467 break;
1468 // case USB_CDC_NOTIFY_RESPONSE_AVAILABLE: /* RNDIS; or unsolicited */
1469 default:
1470 deverr (dev, "CDC: unexpected notification %02x!",
1471 event->bNotificationType);
1472 break;
1473 }
1474}
1475
1da177e4
LT		 1476static u8 nibble (unsigned char c)
1477{
1478 if (likely (isdigit (c)))
1479 return c - '0';
1480 c = toupper (c);
1481 if (likely (isxdigit (c)))
1482 return 10 + c - 'A';
1483 return 0;
1484}
1485
1486static inline int
1487get_ethernet_addr (struct usbnet *dev, struct usb_cdc_ether_desc *e)
1488{
1489 int tmp, i;
1490 unsigned char buf [13];
1491
1492 tmp = usb_string (dev->udev, e->iMACAddress, buf, sizeof buf);
1493 if (tmp != 12) {
1494 dev_dbg (&dev->udev->dev,
1495 "bad MAC string %d fetch, %d\n", e->iMACAddress, tmp);
1496 if (tmp >= 0)
1497 tmp = -EINVAL;
1498 return tmp;
1499 }
1500 for (i = tmp = 0; i < 6; i++, tmp += 2)
1501 dev->net->dev_addr [i] =
1502 (nibble (buf [tmp]) << 4) + nibble (buf [tmp + 1]);
1503 return 0;
1504}
1505
1506static int cdc_bind (struct usbnet *dev, struct usb_interface *intf)
1507{
1508 int status;
1509 struct cdc_state *info = (void *) &dev->data;
1510
1511 status = generic_cdc_bind (dev, intf);
1512 if (status < 0)
1513 return status;
1514
1515 status = get_ethernet_addr (dev, info->ether);
1516 if (status < 0) {
1517 usb_set_intfdata(info->data, NULL);
1518 usb_driver_release_interface (&usbnet_driver, info->data);
1519 return status;
1520 }
1521
1522 /* FIXME cdc-ether has some multicast code too, though it complains
1523 * in routine cases. info->ether describes the multicast support.
1524 */
1525 return 0;
1526}
1527
1528static const struct driver_info cdc_info = {
1529 .description = "CDC Ethernet Device",
1530 .flags = FLAG_ETHER,
1531 // .check_connect = cdc_check_connect,
1532 .bind = cdc_bind,
1533 .unbind = cdc_unbind,
1534 .status = cdc_status,
1535};
1536
1537#endif /* CONFIG_USB_CDCETHER */
1538
1539
1540\f
1541#ifdef CONFIG_USB_EPSON2888
1542#define HAVE_HARDWARE
1543
1544/*-------------------------------------------------------------------------
1545 *
1546 * EPSON USB clients
1547 *
1548 * This is the same idea as Linux PDAs (below) except the firmware in the
1549 * device might not be Tux-powered. Epson provides reference firmware that
1550 * implements this interface. Product developers can reuse or modify that
1551 * code, such as by using their own product and vendor codes.
1552 *
1553 * Support was from Juro Bystricky <bystricky.juro@erd.epson.com>
1554 *
1555 *-------------------------------------------------------------------------*/
1556
1557static const struct driver_info epson2888_info = {
1558 .description = "Epson USB Device",
1559 .check_connect = always_connected,
1560
1561 .in = 4, .out = 3,
1562};
1563
1564#endif /* CONFIG_USB_EPSON2888 */
1565
1566\f
1567#ifdef CONFIG_USB_GENESYS
1568#define HAVE_HARDWARE
1569
1570/*-------------------------------------------------------------------------
1571 *
1572 * GeneSys GL620USB-A (www.genesyslogic.com.tw)
1573 *
1574 * ... should partially interop with the Win32 driver for this hardware
1575 * The GeneSys docs imply there's some NDIS issue motivating this framing.
1576 *
1577 * Some info from GeneSys:
1578 * - GL620USB-A is full duplex; GL620USB is only half duplex for bulk.
1579 * (Some cables, like the BAFO-100c, use the half duplex version.)
1580 * - For the full duplex model, the low bit of the version code says
1581 * which side is which ("left/right").
1582 * - For the half duplex type, a control/interrupt handshake settles
1583 * the transfer direction. (That's disabled here, partially coded.)
1584 * A control URB would block until other side writes an interrupt.
1585 *
1586 * Original code from Jiun-Jie Huang <huangjj@genesyslogic.com.tw>
1587 * and merged into "usbnet" by Stanislav Brabec <utx@penguin.cz>.
1588 *
1589 *-------------------------------------------------------------------------*/
1590
1591// control msg write command
1592#define GENELINK_CONNECT_WRITE 0xF0
1593// interrupt pipe index
1594#define GENELINK_INTERRUPT_PIPE 0x03
1595// interrupt read buffer size
1596#define INTERRUPT_BUFSIZE 0x08
1597// interrupt pipe interval value
1598#define GENELINK_INTERRUPT_INTERVAL 0x10
1599// max transmit packet number per transmit
1600#define GL_MAX_TRANSMIT_PACKETS 32
1601// max packet length
1602#define GL_MAX_PACKET_LEN 1514
1603// max receive buffer size
1604#define GL_RCV_BUF_SIZE \
1605 (((GL_MAX_PACKET_LEN + 4) * GL_MAX_TRANSMIT_PACKETS) + 4)
1606
1607struct gl_packet {
1608 u32 packet_length;
1609 char packet_data [1];
1610};
1611
1612struct gl_header {
1613 u32 packet_count;
1614 struct gl_packet packets;
1615};
1616
1617#ifdef GENELINK_ACK
1618
1619// FIXME: this code is incomplete, not debugged; it doesn't
1620// handle interrupts correctly. interrupts should be generic
1621// code like all other device I/O, anyway.
1622
1623struct gl_priv {
1624 struct urb *irq_urb;
1625 char irq_buf [INTERRUPT_BUFSIZE];
1626};
1627
1628static inline int gl_control_write (struct usbnet *dev, u8 request, u16 value)
1629{
1630 int retval;
1631
1632 retval = usb_control_msg (dev->udev,
1633 usb_sndctrlpipe (dev->udev, 0),
1634 request,
1635 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1636 value,
1637 0, // index
1638 0, // data buffer
1639 0, // size
1640 CONTROL_TIMEOUT_MS);
1641 return retval;
1642}
1643
1644static void gl_interrupt_complete (struct urb *urb, struct pt_regs *regs)
1645{
1646 int status = urb->status;
1647
1648 switch (status) {
1649 case 0:
1650 /* success */
1651 break;
1652 case -ECONNRESET:
1653 case -ENOENT:
1654 case -ESHUTDOWN:
1655 /* this urb is terminated, clean up */
1656 dbg("%s - urb shutting down with status: %d",
1657 __FUNCTION__, status);
1658 return;
1659 default:
1660 dbg("%s - nonzero urb status received: %d",
1661 __FUNCTION__, urb->status);
1662 }
1663
1664 status = usb_submit_urb (urb, GFP_ATOMIC);
1665 if (status)
1666 err ("%s - usb_submit_urb failed with result %d",
1667 __FUNCTION__, status);
1668}
1669
1670static int gl_interrupt_read (struct usbnet *dev)
1671{
1672 struct gl_priv *priv = dev->priv_data;
1673 int retval;
1674
1675 // issue usb interrupt read
1676 if (priv && priv->irq_urb) {
1677 // submit urb
1678 if ((retval = usb_submit_urb (priv->irq_urb, GFP_KERNEL)) != 0)
1679 dbg ("gl_interrupt_read: submit fail - %X...", retval);
1680 else
1681 dbg ("gl_interrupt_read: submit success...");
1682 }
1683
1684 return 0;
1685}
1686
1687// check whether another side is connected
1688static int genelink_check_connect (struct usbnet *dev)
1689{
1690 int retval;
1691
1692 dbg ("genelink_check_connect...");
1693
1694 // detect whether another side is connected
1695 if ((retval = gl_control_write (dev, GENELINK_CONNECT_WRITE, 0)) != 0) {
1696 dbg ("%s: genelink_check_connect write fail - %X",
1697 dev->net->name, retval);
1698 return retval;
1699 }
1700
1701 // usb interrupt read to ack another side
1702 if ((retval = gl_interrupt_read (dev)) != 0) {
1703 dbg ("%s: genelink_check_connect read fail - %X",
1704 dev->net->name, retval);
1705 return retval;
1706 }
1707
1708 dbg ("%s: genelink_check_connect read success", dev->net->name);
1709 return 0;
1710}
1711
1712// allocate and initialize the private data for genelink
1713static int genelink_init (struct usbnet *dev)
1714{
1715 struct gl_priv *priv;
1716
1717 // allocate the private data structure
1718 if ((priv = kmalloc (sizeof *priv, GFP_KERNEL)) == 0) {
1719 dbg ("%s: cannot allocate private data per device",
1720 dev->net->name);
1721 return -ENOMEM;
1722 }
1723
1724 // allocate irq urb
1725 if ((priv->irq_urb = usb_alloc_urb (0, GFP_KERNEL)) == 0) {
1726 dbg ("%s: cannot allocate private irq urb per device",
1727 dev->net->name);
1728 kfree (priv);
1729 return -ENOMEM;
1730 }
1731
1732 // fill irq urb
1733 usb_fill_int_urb (priv->irq_urb, dev->udev,
1734 usb_rcvintpipe (dev->udev, GENELINK_INTERRUPT_PIPE),
1735 priv->irq_buf, INTERRUPT_BUFSIZE,
1736 gl_interrupt_complete, 0,
1737 GENELINK_INTERRUPT_INTERVAL);
1738
1739 // set private data pointer
1740 dev->priv_data = priv;
1741
1742 return 0;
1743}
1744
1745// release the private data
1746static int genelink_free (struct usbnet *dev)
1747{
1748 struct gl_priv *priv = dev->priv_data;
1749
1750 if (!priv)
1751 return 0;
1752
1753// FIXME: can't cancel here; it's synchronous, and
1754// should have happened earlier in any case (interrupt
1755// handling needs to be generic)
1756
1757 // cancel irq urb first
1758 usb_kill_urb (priv->irq_urb);
1759
1760 // free irq urb
1761 usb_free_urb (priv->irq_urb);
1762
1763 // free the private data structure
1764 kfree (priv);
1765
1766 return 0;
1767}
1768
1769#endif
1770
1771static int genelink_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
1772{
1773 struct gl_header *header;
1774 struct gl_packet *packet;
1775 struct sk_buff *gl_skb;
1776 u32 size;
1777
1778 header = (struct gl_header *) skb->data;
1779
1780 // get the packet count of the received skb
1781 le32_to_cpus (&header->packet_count);
1782 if ((header->packet_count > GL_MAX_TRANSMIT_PACKETS)
1783 || (header->packet_count < 0)) {
1784 dbg ("genelink: invalid received packet count %d",
1785 header->packet_count);
1786 return 0;
1787 }
1788
1789 // set the current packet pointer to the first packet
1790 packet = &header->packets;
1791
1792 // decrement the length for the packet count size 4 bytes
1793 skb_pull (skb, 4);
1794
1795 while (header->packet_count > 1) {
1796 // get the packet length
1797 size = packet->packet_length;
1798
1799 // this may be a broken packet
1800 if (size > GL_MAX_PACKET_LEN) {
1801 dbg ("genelink: invalid rx length %d", size);
1802 return 0;
1803 }
1804
1805 // allocate the skb for the individual packet
1806 gl_skb = alloc_skb (size, GFP_ATOMIC);
1807 if (gl_skb) {
1808
1809 // copy the packet data to the new skb
1810 memcpy(skb_put(gl_skb, size), packet->packet_data, size);
2bbfb16b 1811 skb_return (dev, gl_skb);
1da177e4
LT		 1812 }
1813
1814 // advance to the next packet
1815 packet = (struct gl_packet *)
1816 &packet->packet_data [size];
1817 header->packet_count--;
1818
1819 // shift the data pointer to the next gl_packet
1820 skb_pull (skb, size + 4);
1821 }
1822
1823 // skip the packet length field 4 bytes
1824 skb_pull (skb, 4);
1825
1826 if (skb->len > GL_MAX_PACKET_LEN) {
1827 dbg ("genelink: invalid rx length %d", skb->len);
1828 return 0;
1829 }
1830 return 1;
1831}
1832
1833static struct sk_buff *
0d9899f8 1834genelink_tx_fixup (struct usbnet *dev, struct sk_buff *skb, unsigned flags)
1da177e4
LT		 1835{
1836 int padlen;
1837 int length = skb->len;
1838 int headroom = skb_headroom (skb);
1839 int tailroom = skb_tailroom (skb);
1840 u32 *packet_count;
1841 u32 *packet_len;
1842
1843 // FIXME: magic numbers, bleech
1844 padlen = ((skb->len + (4 + 4*1)) % 64) ? 0 : 1;
1845
1846 if ((!skb_cloned (skb))
1847 && ((headroom + tailroom) >= (padlen + (4 + 4*1)))) {
1848 if ((headroom < (4 + 4*1)) || (tailroom < padlen)) {
1849 skb->data = memmove (skb->head + (4 + 4*1),
1850 skb->data, skb->len);
1851 skb->tail = skb->data + skb->len;
1852 }
1853 } else {
1854 struct sk_buff *skb2;
1855 skb2 = skb_copy_expand (skb, (4 + 4*1) , padlen, flags);
1856 dev_kfree_skb_any (skb);
1857 skb = skb2;
1858 if (!skb)
1859 return NULL;
1860 }
1861
1862 // attach the packet count to the header
1863 packet_count = (u32 *) skb_push (skb, (4 + 4*1));
1864 packet_len = packet_count + 1;
1865
1866 // FIXME little endian?
1867 *packet_count = 1;
1868 *packet_len = length;
1869
1870 // add padding byte
1871 if ((skb->len % dev->maxpacket) == 0)
1872 skb_put (skb, 1);
1873
1874 return skb;
1875}
1876
f29fc259
DB		 1877static int genelink_bind (struct usbnet *dev, struct usb_interface *intf)
1878{
1879 dev->hard_mtu = GL_RCV_BUF_SIZE;
1880 dev->net->hard_header_len += 4;
1881 return 0;
1882}
1883
1da177e4
LT		 1884static const struct driver_info genelink_info = {
1885 .description = "Genesys GeneLink",
1886 .flags = FLAG_FRAMING_GL | FLAG_NO_SETINT,
f29fc259 1887 .bind = genelink_bind,
1da177e4
LT		 1888 .rx_fixup = genelink_rx_fixup,
1889 .tx_fixup = genelink_tx_fixup,
1890
1891 .in = 1, .out = 2,
1892
1893#ifdef GENELINK_ACK
1894 .check_connect =genelink_check_connect,
1895#endif
1896};
1897
1898#endif /* CONFIG_USB_GENESYS */
1899
1900
1901\f
1902#ifdef CONFIG_USB_NET1080
1903#define HAVE_HARDWARE
1904
1905/*-------------------------------------------------------------------------
1906 *
1907 * Netchip 1080 driver ... http://www.netchip.com
1908 * Used in LapLink cables
1909 *
1910 *-------------------------------------------------------------------------*/
1911
1da177e4
LT		 1912#define frame_errors data[1]
1913
1914/*
1915 * NetChip framing of ethernet packets, supporting additional error
1916 * checks for links that may drop bulk packets from inside messages.
1917 * Odd USB length == always short read for last usb packet.
1918 * - nc_header
1919 * - Ethernet header (14 bytes)
1920 * - payload
1921 * - (optional padding byte, if needed so length becomes odd)
1922 * - nc_trailer
1923 *
1924 * This framing is to be avoided for non-NetChip devices.
1925 */
1926
1927struct nc_header { // packed:
1928 __le16 hdr_len; // sizeof nc_header (LE, all)
1929 __le16 packet_len; // payload size (including ethhdr)
1930 __le16 packet_id; // detects dropped packets
1931#define MIN_HEADER 6
1932
1933 // all else is optional, and must start with:
1934 // u16 vendorId; // from usb-if
1935 // u16 productId;
1936} __attribute__((__packed__));
1937
1938#define PAD_BYTE ((unsigned char)0xAC)
1939
1940struct nc_trailer {
1941 __le16 packet_id;
1942} __attribute__((__packed__));
1943
1944// packets may use FLAG_FRAMING_NC and optional pad
1945#define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \
1946 + sizeof (struct ethhdr) \
1947 + (mtu) \
1948 + 1 \
1949 + sizeof (struct nc_trailer))
1950
1951#define MIN_FRAMED FRAMED_SIZE(0)
1952
f29fc259
DB		 1953/* packets _could_ be up to 64KB... */
1954#define NC_MAX_PACKET 32767
1955
1da177e4
LT		 1956
1957/*
1958 * Zero means no timeout; else, how long a 64 byte bulk packet may be queued
1959 * before the hardware drops it. If that's done, the driver will need to
1960 * frame network packets to guard against the dropped USB packets. The win32
1961 * driver sets this for both sides of the link.
1962 */
1963#define NC_READ_TTL_MS ((u8)255) // ms
1964
1965/*
1966 * We ignore most registers and EEPROM contents.
1967 */
1968#define REG_USBCTL ((u8)0x04)
1969#define REG_TTL ((u8)0x10)
1970#define REG_STATUS ((u8)0x11)
1971
1972/*
1973 * Vendor specific requests to read/write data
1974 */
1975#define REQUEST_REGISTER ((u8)0x10)
1976#define REQUEST_EEPROM ((u8)0x11)
1977
1978static int
1979nc_vendor_read (struct usbnet *dev, u8 req, u8 regnum, u16 *retval_ptr)
1980{
1981 int status = usb_control_msg (dev->udev,
1982 usb_rcvctrlpipe (dev->udev, 0),
1983 req,
1984 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1985 0, regnum,
1986 retval_ptr, sizeof *retval_ptr,
1987 CONTROL_TIMEOUT_MS);
1988 if (status > 0)
1989 status = 0;
1990 if (!status)
1991 le16_to_cpus (retval_ptr);
1992 return status;
1993}
1994
1995static inline int
1996nc_register_read (struct usbnet *dev, u8 regnum, u16 *retval_ptr)
1997{
1998 return nc_vendor_read (dev, REQUEST_REGISTER, regnum, retval_ptr);
1999}
2000
2001// no retval ... can become async, usable in_interrupt()
2002static void
2003nc_vendor_write (struct usbnet *dev, u8 req, u8 regnum, u16 value)
2004{
2005 usb_control_msg (dev->udev,
2006 usb_sndctrlpipe (dev->udev, 0),
2007 req,
2008 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2009 value, regnum,
2010 NULL, 0, // data is in setup packet
2011 CONTROL_TIMEOUT_MS);
2012}
2013
2014static inline void
2015nc_register_write (struct usbnet *dev, u8 regnum, u16 value)
2016{
2017 nc_vendor_write (dev, REQUEST_REGISTER, regnum, value);
2018}
2019
2020
2021#if 0
2022static void nc_dump_registers (struct usbnet *dev)
2023{
2024 u8 reg;
2025 u16 *vp = kmalloc (sizeof (u16));
2026
2027 if (!vp) {
2028 dbg ("no memory?");
2029 return;
2030 }
2031
2032 dbg ("%s registers:", dev->net->name);
2033 for (reg = 0; reg < 0x20; reg++) {
2034 int retval;
2035
2036 // reading some registers is trouble
2037 if (reg >= 0x08 && reg <= 0xf)
2038 continue;
2039 if (reg >= 0x12 && reg <= 0x1e)
2040 continue;
2041
2042 retval = nc_register_read (dev, reg, vp);
2043 if (retval < 0)
2044 dbg ("%s reg [0x%x] ==> error %d",
2045 dev->net->name, reg, retval);
2046 else
2047 dbg ("%s reg [0x%x] = 0x%x",
2048 dev->net->name, reg, *vp);
2049 }
2050 kfree (vp);
2051}
2052#endif
2053
2054
2055/*-------------------------------------------------------------------------*/
2056
2057/*
2058 * Control register
2059 */
2060
2061#define USBCTL_WRITABLE_MASK 0x1f0f
2062// bits 15-13 reserved, r/o
2063#define USBCTL_ENABLE_LANG (1 << 12)
2064#define USBCTL_ENABLE_MFGR (1 << 11)
2065#define USBCTL_ENABLE_PROD (1 << 10)
2066#define USBCTL_ENABLE_SERIAL (1 << 9)
2067#define USBCTL_ENABLE_DEFAULTS (1 << 8)
2068// bits 7-4 reserved, r/o
2069#define USBCTL_FLUSH_OTHER (1 << 3)
2070#define USBCTL_FLUSH_THIS (1 << 2)
2071#define USBCTL_DISCONN_OTHER (1 << 1)
2072#define USBCTL_DISCONN_THIS (1 << 0)
2073
2074static inline void nc_dump_usbctl (struct usbnet *dev, u16 usbctl)
2075{
2076 if (!netif_msg_link (dev))
2077 return;
2078 devdbg (dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;"
2079 " this%s%s;"
2080 " other%s%s; r/o 0x%x",
2081 dev->udev->bus->bus_name, dev->udev->devpath,
2082 usbctl,
2083 (usbctl & USBCTL_ENABLE_LANG) ? " lang" : "",
2084 (usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "",
2085 (usbctl & USBCTL_ENABLE_PROD) ? " prod" : "",
2086 (usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "",
2087 (usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "",
2088
2089 (usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "",
2090 (usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "",
2091 (usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "",
2092 (usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "",
2093 usbctl & ~USBCTL_WRITABLE_MASK
2094 );
2095}
2096
2097/*-------------------------------------------------------------------------*/
2098
2099/*
2100 * Status register
2101 */
2102
2103#define STATUS_PORT_A (1 << 15)
2104
2105#define STATUS_CONN_OTHER (1 << 14)
2106#define STATUS_SUSPEND_OTHER (1 << 13)
2107#define STATUS_MAILBOX_OTHER (1 << 12)
2108#define STATUS_PACKETS_OTHER(n) (((n) >> 8) && 0x03)
2109
2110#define STATUS_CONN_THIS (1 << 6)
2111#define STATUS_SUSPEND_THIS (1 << 5)
2112#define STATUS_MAILBOX_THIS (1 << 4)
2113#define STATUS_PACKETS_THIS(n) (((n) >> 0) && 0x03)
2114
2115#define STATUS_UNSPEC_MASK 0x0c8c
2116#define STATUS_NOISE_MASK ((u16)~(0x0303|STATUS_UNSPEC_MASK))
2117
2118
2119static inline void nc_dump_status (struct usbnet *dev, u16 status)
2120{
2121 if (!netif_msg_link (dev))
2122 return;
2123 devdbg (dev, "net1080 %s-%s status 0x%x:"
2124 " this (%c) PKT=%d%s%s%s;"
2125 " other PKT=%d%s%s%s; unspec 0x%x",
2126 dev->udev->bus->bus_name, dev->udev->devpath,
2127 status,
2128
2129 // XXX the packet counts don't seem right
2130 // (1 at reset, not 0); maybe UNSPEC too
2131
2132 (status & STATUS_PORT_A) ? 'A' : 'B',
2133 STATUS_PACKETS_THIS (status),
2134 (status & STATUS_CONN_THIS) ? " CON" : "",
2135 (status & STATUS_SUSPEND_THIS) ? " SUS" : "",
2136 (status & STATUS_MAILBOX_THIS) ? " MBOX" : "",
2137
2138 STATUS_PACKETS_OTHER (status),
2139 (status & STATUS_CONN_OTHER) ? " CON" : "",
2140 (status & STATUS_SUSPEND_OTHER) ? " SUS" : "",
2141 (status & STATUS_MAILBOX_OTHER) ? " MBOX" : "",
2142
2143 status & STATUS_UNSPEC_MASK
2144 );
2145}
2146
2147/*-------------------------------------------------------------------------*/
2148
2149/*
2150 * TTL register
2151 */
2152
2153#define TTL_THIS(ttl) (0x00ff & ttl)
2154#define TTL_OTHER(ttl) (0x00ff & (ttl >> 8))
2155#define MK_TTL(this,other) ((u16)(((other)<<8)|(0x00ff&(this))))
2156
2157static inline void nc_dump_ttl (struct usbnet *dev, u16 ttl)
2158{
2159 if (netif_msg_link (dev))
2160 devdbg (dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d",
2161 dev->udev->bus->bus_name, dev->udev->devpath,
2162 ttl, TTL_THIS (ttl), TTL_OTHER (ttl));
2163}
2164
2165/*-------------------------------------------------------------------------*/
2166
2167static int net1080_reset (struct usbnet *dev)
2168{
2169 u16 usbctl, status, ttl;
2170 u16 *vp = kmalloc (sizeof (u16), GFP_KERNEL);
2171 int retval;
2172
2173 if (!vp)
2174 return -ENOMEM;
2175
2176 // nc_dump_registers (dev);
2177
2178 if ((retval = nc_register_read (dev, REG_STATUS, vp)) < 0) {
2179 dbg ("can't read %s-%s status: %d",
2180 dev->udev->bus->bus_name, dev->udev->devpath, retval);
2181 goto done;
2182 }
2183 status = *vp;
2184 nc_dump_status (dev, status);
2185
2186 if ((retval = nc_register_read (dev, REG_USBCTL, vp)) < 0) {
2187 dbg ("can't read USBCTL, %d", retval);
2188 goto done;
2189 }
2190 usbctl = *vp;
2191 nc_dump_usbctl (dev, usbctl);
2192
2193 nc_register_write (dev, REG_USBCTL,
2194 USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER);
2195
2196 if ((retval = nc_register_read (dev, REG_TTL, vp)) < 0) {
2197 dbg ("can't read TTL, %d", retval);
2198 goto done;
2199 }
2200 ttl = *vp;
2201 // nc_dump_ttl (dev, ttl);
2202
2203 nc_register_write (dev, REG_TTL,
2204 MK_TTL (NC_READ_TTL_MS, TTL_OTHER (ttl)) );
2205 dbg ("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS);
2206
2207 if (netif_msg_link (dev))
2208 devinfo (dev, "port %c, peer %sconnected",
2209 (status & STATUS_PORT_A) ? 'A' : 'B',
2210 (status & STATUS_CONN_OTHER) ? "" : "dis"
2211 );
2212 retval = 0;
2213
2214done:
2215 kfree (vp);
2216 return retval;
2217}
2218
2219static int net1080_check_connect (struct usbnet *dev)
2220{
2221 int retval;
2222 u16 status;
2223 u16 *vp = kmalloc (sizeof (u16), GFP_KERNEL);
2224
2225 if (!vp)
2226 return -ENOMEM;
2227 retval = nc_register_read (dev, REG_STATUS, vp);
2228 status = *vp;
2229 kfree (vp);
2230 if (retval != 0) {
2231 dbg ("%s net1080_check_conn read - %d", dev->net->name, retval);
2232 return retval;
2233 }
2234 if ((status & STATUS_CONN_OTHER) != STATUS_CONN_OTHER)
2235 return -ENOLINK;
2236 return 0;
2237}
2238
2239static void nc_flush_complete (struct urb *urb, struct pt_regs *regs)
2240{
2241 kfree (urb->context);
2242 usb_free_urb(urb);
2243}
2244
2245static void nc_ensure_sync (struct usbnet *dev)
2246{
2247 dev->frame_errors++;
2248 if (dev->frame_errors > 5) {
2249 struct urb *urb;
2250 struct usb_ctrlrequest *req;
2251 int status;
2252
2253 /* Send a flush */
2254 urb = usb_alloc_urb (0, SLAB_ATOMIC);
2255 if (!urb)
2256 return;
2257
2258 req = kmalloc (sizeof *req, GFP_ATOMIC);
2259 if (!req) {
2260 usb_free_urb (urb);
2261 return;
2262 }
2263
2264 req->bRequestType = USB_DIR_OUT
2265 | USB_TYPE_VENDOR
2266 | USB_RECIP_DEVICE;
2267 req->bRequest = REQUEST_REGISTER;
2268 req->wValue = cpu_to_le16 (USBCTL_FLUSH_THIS
2269 | USBCTL_FLUSH_OTHER);
2270 req->wIndex = cpu_to_le16 (REG_USBCTL);
2271 req->wLength = cpu_to_le16 (0);
2272
2273 /* queue an async control request, we don't need
2274 * to do anything when it finishes except clean up.
2275 */
2276 usb_fill_control_urb (urb, dev->udev,
2277 usb_sndctrlpipe (dev->udev, 0),
2278 (unsigned char *) req,
2279 NULL, 0,
2280 nc_flush_complete, req);
2281 status = usb_submit_urb (urb, GFP_ATOMIC);
2282 if (status) {
2283 kfree (req);
2284 usb_free_urb (urb);
2285 return;
2286 }
2287
2288 if (netif_msg_rx_err (dev))
2289 devdbg (dev, "flush net1080; too many framing errors");
2290 dev->frame_errors = 0;
2291 }
2292}
2293
2294static int net1080_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
2295{
2296 struct nc_header *header;
f29fc259 2297 struct net_device *net = dev->net;
1da177e4
LT		 2298 struct nc_trailer *trailer;
2299 u16 hdr_len, packet_len;
2300
f29fc259 2301 if (!(skb->len & 0x01)) {
1da177e4
LT		 2302 dev->stats.rx_frame_errors++;
2303 dbg ("rx framesize %d range %d..%d mtu %d", skb->len,
f29fc259 2304 net->hard_header_len, dev->hard_mtu, net->mtu);
1da177e4
LT		 2305 nc_ensure_sync (dev);
2306 return 0;
2307 }
2308
2309 header = (struct nc_header *) skb->data;
2310 hdr_len = le16_to_cpup (&header->hdr_len);
2311 packet_len = le16_to_cpup (&header->packet_len);
f29fc259 2312 if (FRAMED_SIZE (packet_len) > NC_MAX_PACKET) {
1da177e4
LT		 2313 dev->stats.rx_frame_errors++;
2314 dbg ("packet too big, %d", packet_len);
2315 nc_ensure_sync (dev);
2316 return 0;
2317 } else if (hdr_len < MIN_HEADER) {
2318 dev->stats.rx_frame_errors++;
2319 dbg ("header too short, %d", hdr_len);
2320 nc_ensure_sync (dev);
2321 return 0;
2322 } else if (hdr_len > MIN_HEADER) {
2323 // out of band data for us?
2324 dbg ("header OOB, %d bytes", hdr_len - MIN_HEADER);
2325 nc_ensure_sync (dev);
2326 // switch (vendor/product ids) { ... }
2327 }
2328 skb_pull (skb, hdr_len);
2329
2330 trailer = (struct nc_trailer *)
2331 (skb->data + skb->len - sizeof *trailer);
2332 skb_trim (skb, skb->len - sizeof *trailer);
2333
2334 if ((packet_len & 0x01) == 0) {
2335 if (skb->data [packet_len] != PAD_BYTE) {
2336 dev->stats.rx_frame_errors++;
2337 dbg ("bad pad");
2338 return 0;
2339 }
2340 skb_trim (skb, skb->len - 1);
2341 }
2342 if (skb->len != packet_len) {
2343 dev->stats.rx_frame_errors++;
2344 dbg ("bad packet len %d (expected %d)",
2345 skb->len, packet_len);
2346 nc_ensure_sync (dev);
2347 return 0;
2348 }
2349 if (header->packet_id != get_unaligned (&trailer->packet_id)) {
2350 dev->stats.rx_fifo_errors++;
2351 dbg ("(2+ dropped) rx packet_id mismatch 0x%x 0x%x",
2352 le16_to_cpu (header->packet_id),
2353 le16_to_cpu (trailer->packet_id));
2354 return 0;
2355 }
2356#if 0
2357 devdbg (dev, "frame <rx h %d p %d id %d", header->hdr_len,
2358 header->packet_len, header->packet_id);
2359#endif
2360 dev->frame_errors = 0;
2361 return 1;
2362}
2363
2364static struct sk_buff *
0d9899f8 2365net1080_tx_fixup (struct usbnet *dev, struct sk_buff *skb, unsigned flags)
1da177e4
LT		 2366{
2367 int padlen;
2368 struct sk_buff *skb2;
2369
2370 padlen = ((skb->len + sizeof (struct nc_header)
2371 + sizeof (struct nc_trailer)) & 0x01) ? 0 : 1;
2372 if (!skb_cloned (skb)) {
2373 int headroom = skb_headroom (skb);
2374 int tailroom = skb_tailroom (skb);
2375
2376 if ((padlen + sizeof (struct nc_trailer)) <= tailroom
2377 && sizeof (struct nc_header) <= headroom)
2378 /* There's enough head and tail room */
2379 return skb;
2380
2381 if ((sizeof (struct nc_header) + padlen
2382 + sizeof (struct nc_trailer)) <
2383 (headroom + tailroom)) {
2384 /* There's enough total room, so just readjust */
2385 skb->data = memmove (skb->head
2386 + sizeof (struct nc_header),
2387 skb->data, skb->len);
2388 skb->tail = skb->data + skb->len;
2389 return skb;
2390 }
2391 }
2392
2393 /* Create a new skb to use with the correct size */
2394 skb2 = skb_copy_expand (skb,
2395 sizeof (struct nc_header),
2396 sizeof (struct nc_trailer) + padlen,
2397 flags);
2398 dev_kfree_skb_any (skb);
2399 return skb2;
2400}
2401
f29fc259
DB		 2402static int net1080_bind (struct usbnet *dev, struct usb_interface *intf)
2403{
2404 unsigned extra = sizeof (struct nc_header)
2405 + 1
2406 + sizeof (struct nc_trailer);
2407
2408 dev->net->hard_header_len += extra;
2409 dev->hard_mtu = NC_MAX_PACKET;
2410 return 0;
2411}
2412
1da177e4
LT		 2413static const struct driver_info net1080_info = {
2414 .description = "NetChip TurboCONNECT",
2415 .flags = FLAG_FRAMING_NC,
f29fc259 2416 .bind = net1080_bind,
1da177e4 2417 .reset = net1080_reset,
f29fc259 2418 .check_connect = net1080_check_connect,
1da177e4
LT		 2419 .rx_fixup = net1080_rx_fixup,
2420 .tx_fixup = net1080_tx_fixup,
2421};
2422
2423#endif /* CONFIG_USB_NET1080 */
2424
2425
2426\f
2427#ifdef CONFIG_USB_PL2301
2428#define HAVE_HARDWARE
2429
2430/*-------------------------------------------------------------------------
2431 *
2432 * Prolific PL-2301/PL-2302 driver ... http://www.prolifictech.com
2433 *
2434 * The protocol and handshaking used here should be bug-compatible
2435 * with the Linux 2.2 "plusb" driver, by Deti Fliegl.
2436 *
2437 *-------------------------------------------------------------------------*/
2438
2439/*
2440 * Bits 0-4 can be used for software handshaking; they're set from
2441 * one end, cleared from the other, "read" with the interrupt byte.
2442 */
2443#define PL_S_EN (1<<7) /* (feature only) suspend enable */
2444/* reserved bit -- rx ready (6) ? */
2445#define PL_TX_READY (1<<5) /* (interrupt only) transmit ready */
2446#define PL_RESET_OUT (1<<4) /* reset output pipe */
2447#define PL_RESET_IN (1<<3) /* reset input pipe */
2448#define PL_TX_C (1<<2) /* transmission complete */
2449#define PL_TX_REQ (1<<1) /* transmission received */
2450#define PL_PEER_E (1<<0) /* peer exists */
2451
2452static inline int
2453pl_vendor_req (struct usbnet *dev, u8 req, u8 val, u8 index)
2454{
2455 return usb_control_msg (dev->udev,
2456 usb_rcvctrlpipe (dev->udev, 0),
2457 req,
2458 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2459 val, index,
2460 NULL, 0,
2461 CONTROL_TIMEOUT_MS);
2462}
2463
2464static inline int
2465pl_clear_QuickLink_features (struct usbnet *dev, int val)
2466{
2467 return pl_vendor_req (dev, 1, (u8) val, 0);
2468}
2469
2470static inline int
2471pl_set_QuickLink_features (struct usbnet *dev, int val)
2472{
2473 return pl_vendor_req (dev, 3, (u8) val, 0);
2474}
2475
2476/*-------------------------------------------------------------------------*/
2477
2478static int pl_reset (struct usbnet *dev)
2479{
2480 /* some units seem to need this reset, others reject it utterly.
2481 * FIXME be more like "naplink" or windows drivers.
2482 */
2483 (void) pl_set_QuickLink_features (dev,
2484 PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
2485 return 0;
2486}
2487
2488static const struct driver_info prolific_info = {
2489 .description = "Prolific PL-2301/PL-2302",
2490 .flags = FLAG_NO_SETINT,
2491 /* some PL-2302 versions seem to fail usb_set_interface() */
2492 .reset = pl_reset,
2493};
2494
2495#endif /* CONFIG_USB_PL2301 */
2496
2497\f
2498#ifdef CONFIG_USB_KC2190
2499#define HAVE_HARDWARE
2500static const struct driver_info kc2190_info = {
2501 .description = "KC Technology KC-190",
2502};
2503#endif /* CONFIG_USB_KC2190 */
2504
2505\f
2506#ifdef CONFIG_USB_ARMLINUX
2507#define HAVE_HARDWARE
2508
2509/*-------------------------------------------------------------------------
2510 *
2511 * Intel's SA-1100 chip integrates basic USB support, and is used
2512 * in PDAs like some iPaqs, the Yopy, some Zaurus models, and more.
2513 * When they run Linux, arch/arm/mach-sa1100/usb-eth.c may be used to
2514 * network using minimal USB framing data.
2515 *
2516 * This describes the driver currently in standard ARM Linux kernels.
2517 * The Zaurus uses a different driver (see later).
2518 *
2519 * PXA25x and PXA210 use XScale cores (ARM v5TE) with better USB support
2520 * and different USB endpoint numbering than the SA1100 devices. The
2521 * mach-pxa/usb-eth.c driver re-uses the device ids from mach-sa1100
2522 * so we rely on the endpoint descriptors.
2523 *
2524 *-------------------------------------------------------------------------*/
2525
2526static const struct driver_info linuxdev_info = {
2527 .description = "Linux Device",
2528 .check_connect = always_connected,
2529};
2530
2531static const struct driver_info yopy_info = {
2532 .description = "Yopy",
2533 .check_connect = always_connected,
2534};
2535
2536static const struct driver_info blob_info = {
2537 .description = "Boot Loader OBject",
2538 .check_connect = always_connected,
2539};
2540
2541#endif /* CONFIG_USB_ARMLINUX */
2542
2543\f
2544#ifdef CONFIG_USB_ZAURUS
2545#define HAVE_HARDWARE
2546
2547#include <linux/crc32.h>
2548
2549/*-------------------------------------------------------------------------
2550 *
2551 * Zaurus is also a SA-1110 based PDA, but one using a different driver
2552 * (and framing) for its USB slave/gadget controller than the case above.
2553 *
2554 * For the current version of that driver, the main way that framing is
2555 * nonstandard (also from perspective of the CDC ethernet model!) is a
2556 * crc32, added to help detect when some sa1100 usb-to-memory DMA errata
2557 * haven't been fully worked around. Also, all Zaurii use the same
2558 * default Ethernet address.
2559 *
2560 * PXA based models use the same framing, and also can't implement
2561 * set_interface properly.
2562 *
2563 * All known Zaurii lie about their standards conformance. Most lie by
2564 * saying they support CDC Ethernet. Some lie and say they support CDC
2565 * MDLM (as if for access to cell phone modems). Someone, please beat
f3fae6ed 2566 * on Sharp (and other such vendors) for a while with a cluestick.
1da177e4
LT		 2567 *
2568 *-------------------------------------------------------------------------*/
2569
2570static struct sk_buff *
0d9899f8 2571zaurus_tx_fixup (struct usbnet *dev, struct sk_buff *skb, unsigned flags)
1da177e4
LT		 2572{
2573 int padlen;
2574 struct sk_buff *skb2;
2575
2576 padlen = 2;
2577 if (!skb_cloned (skb)) {
2578 int tailroom = skb_tailroom (skb);
2579 if ((padlen + 4) <= tailroom)
2580 goto done;
2581 }
2582 skb2 = skb_copy_expand (skb, 0, 4 + padlen, flags);
2583 dev_kfree_skb_any (skb);
2584 skb = skb2;
2585 if (skb) {
2586 u32 fcs;
2587done:
2588 fcs = crc32_le (~0, skb->data, skb->len);
2589 fcs = ~fcs;
2590
2591 *skb_put (skb, 1) = fcs & 0xff;
2592 *skb_put (skb, 1) = (fcs>> 8) & 0xff;
2593 *skb_put (skb, 1) = (fcs>>16) & 0xff;
2594 *skb_put (skb, 1) = (fcs>>24) & 0xff;
2595 }
2596 return skb;
2597}
2598
f29fc259
DB		 2599static int zaurus_bind (struct usbnet *dev, struct usb_interface *intf)
2600{
2601 /* Belcarra's funky framing has other options; mostly
2602 * TRAILERS (!) with 4 bytes CRC, and maybe 2 pad bytes.
2603 */
2604 dev->net->hard_header_len += 6;
2605 return generic_cdc_bind(dev, intf);
2606}
2607
1da177e4
LT		 2608static const struct driver_info zaurus_sl5x00_info = {
2609 .description = "Sharp Zaurus SL-5x00",
2610 .flags = FLAG_FRAMING_Z,
2611 .check_connect = always_connected,
f29fc259 2612 .bind = zaurus_bind,
1da177e4
LT		 2613 .unbind = cdc_unbind,
2614 .tx_fixup = zaurus_tx_fixup,
2615};
2616#define ZAURUS_STRONGARM_INFO ((unsigned long)&zaurus_sl5x00_info)
2617
2618static const struct driver_info zaurus_pxa_info = {
2619 .description = "Sharp Zaurus, PXA-2xx based",
2620 .flags = FLAG_FRAMING_Z,
2621 .check_connect = always_connected,
f29fc259 2622 .bind = zaurus_bind,
1da177e4
LT		 2623 .unbind = cdc_unbind,
2624 .tx_fixup = zaurus_tx_fixup,
2625};
2626#define ZAURUS_PXA_INFO ((unsigned long)&zaurus_pxa_info)
2627
1da177e4
LT		 2628static const struct driver_info olympus_mxl_info = {
2629 .description = "Olympus R1000",
2630 .flags = FLAG_FRAMING_Z,
2631 .check_connect = always_connected,
f29fc259 2632 .bind = zaurus_bind,
1da177e4
LT		 2633 .unbind = cdc_unbind,
2634 .tx_fixup = zaurus_tx_fixup,
2635};
2636#define OLYMPUS_MXL_INFO ((unsigned long)&olympus_mxl_info)
2637
f3fae6ed
DB		 2638
2639/* Some more recent products using Lineo/Belcarra code will wrongly claim
2640 * CDC MDLM conformance. They aren't conformant: data endpoints live
2641 * in the control interface, there's no data interface, and it's not used
2642 * to talk to a cell phone radio. But at least we can detect these two
2643 * pseudo-classes, rather than growing this product list with entries for
2644 * each new nonconformant product (sigh).
2645 */
2646static const u8 safe_guid[16] = {
2647 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
2648 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
2649};
2650static const u8 blan_guid[16] = {
2651 0x74, 0xf0, 0x3d, 0xbd, 0x1e, 0xc1, 0x44, 0x70,
2652 0xa3, 0x67, 0x71, 0x34, 0xc9, 0xf5, 0x54, 0x37,
2653};
2654
2655static int blan_mdlm_bind (struct usbnet *dev, struct usb_interface *intf)
2656{
2657 u8 *buf = intf->cur_altsetting->extra;
2658 int len = intf->cur_altsetting->extralen;
2659 struct usb_cdc_mdlm_desc *desc = NULL;
2660 struct usb_cdc_mdlm_detail_desc *detail = NULL;
2661
2662 while (len > 3) {
2663 if (buf [1] != USB_DT_CS_INTERFACE)
2664 goto next_desc;
2665
2666 /* use bDescriptorSubType, and just verify that we get a
2667 * "BLAN" (or "SAFE") descriptor.
2668 */
2669 switch (buf [2]) {
2670 case USB_CDC_MDLM_TYPE:
2671 if (desc) {
2672 dev_dbg (&intf->dev, "extra MDLM\n");
2673 goto bad_desc;
2674 }
2675 desc = (void *) buf;
2676 if (desc->bLength != sizeof *desc) {
2677 dev_dbg (&intf->dev, "MDLM len %u\n",
2678 desc->bLength);
2679 goto bad_desc;
2680 }
2681 /* expect bcdVersion 1.0, ignore */
2682 if (memcmp(&desc->bGUID, blan_guid, 16)
f4d340cf 2683 && memcmp(&desc->bGUID, safe_guid, 16) ) {
f3fae6ed
DB		 2684 /* hey, this one might _really_ be MDLM! */
2685 dev_dbg (&intf->dev, "MDLM guid\n");
2686 goto bad_desc;
2687 }
2688 break;
2689 case USB_CDC_MDLM_DETAIL_TYPE:
2690 if (detail) {
2691 dev_dbg (&intf->dev, "extra MDLM detail\n");
2692 goto bad_desc;
2693 }
2694 detail = (void *) buf;
2695 switch (detail->bGuidDescriptorType) {
2696 case 0: /* "SAFE" */
2697 if (detail->bLength != (sizeof *detail + 2))
2698 goto bad_detail;
2699 break;
2700 case 1: /* "BLAN" */
2701 if (detail->bLength != (sizeof *detail + 3))
2702 goto bad_detail;
2703 break;
2704 default:
2705 goto bad_detail;
2706 }
2707
2708 /* assuming we either noticed BLAN already, or will
2709 * find it soon, there are some data bytes here:
2710 * - bmNetworkCapabilities (unused)
2711 * - bmDataCapabilities (bits, see below)
2712 * - bPad (ignored, for PADAFTER -- BLAN-only)
2713 * bits are:
2714 * - 0x01 -- Zaurus framing (add CRC)
80615f81
DB		 2715 * - 0x02 -- PADBEFORE (CRC includes some padding)
2716 * - 0x04 -- PADAFTER (some padding after CRC)
f3fae6ed 2717 * - 0x08 -- "fermat" packet mangling (for hw bugs)
80615f81
DB		 2718 * the PADBEFORE appears not to matter; we interop
2719 * with devices that use it and those that don't.
f3fae6ed 2720 */
80615f81 2721 if ((detail->bDetailData[1] & ~02) != 0x01) {
f3fae6ed
DB		 2722 /* bmDataCapabilites == 0 would be fine too,
2723 * but framing is minidriver-coupled for now.
2724 */
2725bad_detail:
2726 dev_dbg (&intf->dev,
2727 "bad MDLM detail, %d %d %d\n",
2728 detail->bLength,
2729 detail->bDetailData[0],
2730 detail->bDetailData[2]);
2731 goto bad_desc;
2732 }
2733 break;
2734 }
2735next_desc:
2736 len -= buf [0]; /* bLength */
2737 buf += buf [0];
2738 }
2739
2740 if (!desc || !detail) {
2741 dev_dbg (&intf->dev, "missing cdc mdlm %s%sdescriptor\n",
2742 desc ? "" : "func ",
2743 detail ? "" : "detail ");
2744 goto bad_desc;
2745 }
2746
2747 /* There's probably a CDC Ethernet descriptor there, but we can't
2748 * rely on the Ethernet address it provides since not all vendors
2749 * bother to make it unique. Likewise there's no point in tracking
2750 * of the CDC event notifications.
2751 */
2752 return get_endpoints (dev, intf);
2753
2754bad_desc:
2755 dev_info (&dev->udev->dev, "unsupported MDLM descriptors\n");
2756 return -ENODEV;
2757}
2758
2759static const struct driver_info bogus_mdlm_info = {
2760 .description = "pseudo-MDLM (BLAN) device",
2761 .flags = FLAG_FRAMING_Z,
2762 .check_connect = always_connected,
2763 .tx_fixup = zaurus_tx_fixup,
2764 .bind = blan_mdlm_bind,
2765};
2766
1da177e4
LT		 2767#else
2768
2769/* blacklist all those devices */
2770#define ZAURUS_STRONGARM_INFO 0
2771#define ZAURUS_PXA_INFO 0
2772#define OLYMPUS_MXL_INFO 0
2773
2774#endif
2775
2776\f
2777/*-------------------------------------------------------------------------
2778 *
2779 * Network Device Driver (peer link to "Host Device", from USB host)
2780 *
2781 *-------------------------------------------------------------------------*/
2782
2783static int usbnet_change_mtu (struct net_device *net, int new_mtu)
2784{
2785 struct usbnet *dev = netdev_priv(net);
f29fc259 2786 int ll_mtu = new_mtu + net->hard_header_len;
1da177e4 2787
f29fc259 2788 if (new_mtu <= 0 || ll_mtu > dev->hard_mtu)
1da177e4 2789 return -EINVAL;
1da177e4 2790 // no second zero-length packet read wanted after mtu-sized packets
f29fc259 2791 if ((ll_mtu % dev->maxpacket) == 0)
1da177e4
LT		 2792 return -EDOM;
2793 net->mtu = new_mtu;
2794 return 0;
2795}
2796
2797/*-------------------------------------------------------------------------*/
2798
2799static struct net_device_stats *usbnet_get_stats (struct net_device *net)
2800{
2801 struct usbnet *dev = netdev_priv(net);
2802 return &dev->stats;
2803}
2804
2805/*-------------------------------------------------------------------------*/
2806
2807/* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from
2808 * completion callbacks. 2.5 should have fixed those bugs...
2809 */
2810
8728b834 2811static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list)
1da177e4 2812{
1da177e4
LT		 2813 unsigned long flags;
2814
8728b834
DM		 2815 spin_lock_irqsave(&list->lock, flags);
2816 __skb_unlink(skb, list);
2817 spin_unlock(&list->lock);
2818 spin_lock(&dev->done.lock);
2819 __skb_queue_tail(&dev->done, skb);
1da177e4 2820 if (dev->done.qlen == 1)
8728b834
DM		 2821 tasklet_schedule(&dev->bh);
2822 spin_unlock_irqrestore(&dev->done.lock, flags);
1da177e4
LT		 2823}
2824
2825/* some work can't be done in tasklets, so we use keventd
2826 *
2827 * NOTE: annoying asymmetry: if it's active, schedule_work() fails,
2828 * but tasklet_schedule() doesn't. hope the failure is rare.
2829 */
2830static void defer_kevent (struct usbnet *dev, int work)
2831{
2832 set_bit (work, &dev->flags);
2833 if (!schedule_work (&dev->kevent))
2834 deverr (dev, "kevent %d may have been dropped", work);
2835 else
2836 devdbg (dev, "kevent %d scheduled", work);
2837}
2838
2839/*-------------------------------------------------------------------------*/
2840
2841static void rx_complete (struct urb *urb, struct pt_regs *regs);
2842
0d9899f8 2843static void rx_submit (struct usbnet *dev, struct urb *urb, unsigned flags)
1da177e4
LT		 2844{
2845 struct sk_buff *skb;
2846 struct skb_data *entry;
2847 int retval = 0;
2848 unsigned long lockflags;
2849 size_t size;
2850
f29fc259
DB		 2851 size = max(dev->net->hard_header_len + dev->net->mtu,
2852 (unsigned)ETH_FRAME_LEN);
1da177e4
LT		 2853 if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) {
2854 if (netif_msg_rx_err (dev))
2855 devdbg (dev, "no rx skb");
2856 defer_kevent (dev, EVENT_RX_MEMORY);
2857 usb_free_urb (urb);
2858 return;
2859 }
2860 skb_reserve (skb, NET_IP_ALIGN);
2861
2862 entry = (struct skb_data *) skb->cb;
2863 entry->urb = urb;
2864 entry->dev = dev;
2865 entry->state = rx_start;
2866 entry->length = 0;
2867
2868 usb_fill_bulk_urb (urb, dev->udev, dev->in,
2869 skb->data, size, rx_complete, skb);
1da177e4
LT		 2870
2871 spin_lock_irqsave (&dev->rxq.lock, lockflags);
2872
2873 if (netif_running (dev->net)
2874 && netif_device_present (dev->net)
2875 && !test_bit (EVENT_RX_HALT, &dev->flags)) {
2876 switch (retval = usb_submit_urb (urb, GFP_ATOMIC)){
2877 case -EPIPE:
2878 defer_kevent (dev, EVENT_RX_HALT);
2879 break;
2880 case -ENOMEM:
2881 defer_kevent (dev, EVENT_RX_MEMORY);
2882 break;
2883 case -ENODEV:
2884 if (netif_msg_ifdown (dev))
2885 devdbg (dev, "device gone");
2886 netif_device_detach (dev->net);
2887 break;
2888 default:
2889 if (netif_msg_rx_err (dev))
2890 devdbg (dev, "rx submit, %d", retval);
2891 tasklet_schedule (&dev->bh);
2892 break;
2893 case 0:
2894 __skb_queue_tail (&dev->rxq, skb);
2895 }
2896 } else {
2897 if (netif_msg_ifdown (dev))
2898 devdbg (dev, "rx: stopped");
2899 retval = -ENOLINK;
2900 }
2901 spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
2902 if (retval) {
2903 dev_kfree_skb_any (skb);
2904 usb_free_urb (urb);
2905 }
2906}
2907
2908
2909/*-------------------------------------------------------------------------*/
2910
2911static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
2912{
2913 if (dev->driver_info->rx_fixup
2914 && !dev->driver_info->rx_fixup (dev, skb))
2915 goto error;
2916 // else network stack removes extra byte if we forced a short packet
2917
2918 if (skb->len)
2919 skb_return (dev, skb);
2920 else {
2921 if (netif_msg_rx_err (dev))
2922 devdbg (dev, "drop");
2923error:
2924 dev->stats.rx_errors++;
2925 skb_queue_tail (&dev->done, skb);
2926 }
2927}
2928
2929/*-------------------------------------------------------------------------*/
2930
2931static void rx_complete (struct urb *urb, struct pt_regs *regs)
2932{
2933 struct sk_buff *skb = (struct sk_buff *) urb->context;
2934 struct skb_data *entry = (struct skb_data *) skb->cb;
2935 struct usbnet *dev = entry->dev;
2936 int urb_status = urb->status;
2937
2938 skb_put (skb, urb->actual_length);
2939 entry->state = rx_done;
2940 entry->urb = NULL;
2941
2942 switch (urb_status) {
2943 // success
2944 case 0:
f29fc259 2945 if (skb->len < dev->net->hard_header_len) {
1da177e4
LT		 2946 entry->state = rx_cleanup;
2947 dev->stats.rx_errors++;
2948 dev->stats.rx_length_errors++;
2949 if (netif_msg_rx_err (dev))
2950 devdbg (dev, "rx length %d", skb->len);
2951 }
2952 break;
2953
2954 // stalls need manual reset. this is rare ... except that
2955 // when going through USB 2.0 TTs, unplug appears this way.
2956 // we avoid the highspeed version of the ETIMEOUT/EILSEQ
2957 // storm, recovering as needed.
2958 case -EPIPE:
2959 dev->stats.rx_errors++;
2960 defer_kevent (dev, EVENT_RX_HALT);
2961 // FALLTHROUGH
2962
2963 // software-driven interface shutdown
2964 case -ECONNRESET: // async unlink
2965 case -ESHUTDOWN: // hardware gone
2966 if (netif_msg_ifdown (dev))
2967 devdbg (dev, "rx shutdown, code %d", urb_status);
2968 goto block;
2969
2970 // we get controller i/o faults during khubd disconnect() delays.
2971 // throttle down resubmits, to avoid log floods; just temporarily,
2972 // so we still recover when the fault isn't a khubd delay.
2973 case -EPROTO: // ehci
2974 case -ETIMEDOUT: // ohci
2975 case -EILSEQ: // uhci
2976 dev->stats.rx_errors++;
2977 if (!timer_pending (&dev->delay)) {
2978 mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);
2979 if (netif_msg_link (dev))
2980 devdbg (dev, "rx throttle %d", urb_status);
2981 }
2982block:
2983 entry->state = rx_cleanup;
2984 entry->urb = urb;
2985 urb = NULL;
2986 break;
2987
2988 // data overrun ... flush fifo?
2989 case -EOVERFLOW:
2990 dev->stats.rx_over_errors++;
2991 // FALLTHROUGH
2992
2993 default:
2994 entry->state = rx_cleanup;
2995 dev->stats.rx_errors++;
2996 if (netif_msg_rx_err (dev))
2997 devdbg (dev, "rx status %d", urb_status);
2998 break;
2999 }
3000
8728b834 3001 defer_bh(dev, skb, &dev->rxq);
1da177e4
LT		 3002
3003 if (urb) {
3004 if (netif_running (dev->net)
3005 && !test_bit (EVENT_RX_HALT, &dev->flags)) {
3006 rx_submit (dev, urb, GFP_ATOMIC);
3007 return;
3008 }
3009 usb_free_urb (urb);
3010 }
3011 if (netif_msg_rx_err (dev))
3012 devdbg (dev, "no read resubmitted");
3013}
3014
3015static void intr_complete (struct urb *urb, struct pt_regs *regs)
3016{
3017 struct usbnet *dev = urb->context;
3018 int status = urb->status;
3019
3020 switch (status) {
3021 /* success */
3022 case 0:
3023 dev->driver_info->status(dev, urb);
3024 break;
3025
3026 /* software-driven interface shutdown */
3027 case -ENOENT: // urb killed
3028 case -ESHUTDOWN: // hardware gone
3029 if (netif_msg_ifdown (dev))
3030 devdbg (dev, "intr shutdown, code %d", status);
3031 return;
3032
3033 /* NOTE: not throttling like RX/TX, since this endpoint
3034 * already polls infrequently
3035 */
3036 default:
3037 devdbg (dev, "intr status %d", status);
3038 break;
3039 }
3040
3041 if (!netif_running (dev->net))
3042 return;
3043
3044 memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
3045 status = usb_submit_urb (urb, GFP_ATOMIC);
3046 if (status != 0 && netif_msg_timer (dev))
3047 deverr(dev, "intr resubmit --> %d", status);
3048}
3049
3050/*-------------------------------------------------------------------------*/
3051
3052// unlink pending rx/tx; completion handlers do all other cleanup
3053
3054static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
3055{
3056 unsigned long flags;
3057 struct sk_buff *skb, *skbnext;
3058 int count = 0;
3059
3060 spin_lock_irqsave (&q->lock, flags);
3061 for (skb = q->next; skb != (struct sk_buff *) q; skb = skbnext) {
3062 struct skb_data *entry;
3063 struct urb *urb;
3064 int retval;
3065
3066 entry = (struct skb_data *) skb->cb;
3067 urb = entry->urb;
3068 skbnext = skb->next;
3069
3070 // during some PM-driven resume scenarios,
3071 // these (async) unlinks complete immediately
3072 retval = usb_unlink_urb (urb);
3073 if (retval != -EINPROGRESS && retval != 0)
3074 devdbg (dev, "unlink urb err, %d", retval);
3075 else
3076 count++;
3077 }
3078 spin_unlock_irqrestore (&q->lock, flags);
3079 return count;
3080}
3081
3082
3083/*-------------------------------------------------------------------------*/
3084
3085// precondition: never called in_interrupt
3086
3087static int usbnet_stop (struct net_device *net)
3088{
3089 struct usbnet *dev = netdev_priv(net);
3090 int temp;
3091 DECLARE_WAIT_QUEUE_HEAD (unlink_wakeup);
3092 DECLARE_WAITQUEUE (wait, current);
3093
3094 netif_stop_queue (net);
3095
3096 if (netif_msg_ifdown (dev))
3097 devinfo (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld",
3098 dev->stats.rx_packets, dev->stats.tx_packets,
3099 dev->stats.rx_errors, dev->stats.tx_errors
3100 );
3101
3102 // ensure there are no more active urbs
3103 add_wait_queue (&unlink_wakeup, &wait);
3104 dev->wait = &unlink_wakeup;
3105 temp = unlink_urbs (dev, &dev->txq) + unlink_urbs (dev, &dev->rxq);
3106
3107 // maybe wait for deletions to finish.
b03efcfb
DM		 3108 while (!skb_queue_empty(&dev->rxq) &&
3109 !skb_queue_empty(&dev->txq) &&
3110 !skb_queue_empty(&dev->done)) {
1da177e4
LT		 3111 msleep(UNLINK_TIMEOUT_MS);
3112 if (netif_msg_ifdown (dev))
3113 devdbg (dev, "waited for %d urb completions", temp);
3114 }
3115 dev->wait = NULL;
3116 remove_wait_queue (&unlink_wakeup, &wait);
3117
3118 usb_kill_urb(dev->interrupt);
3119
3120 /* deferred work (task, timer, softirq) must also stop.
3121 * can't flush_scheduled_work() until we drop rtnl (later),
3122 * else workers could deadlock; so make workers a NOP.
3123 */
3124 dev->flags = 0;
3125 del_timer_sync (&dev->delay);
3126 tasklet_kill (&dev->bh);
3127
3128 return 0;
3129}
3130
3131/*-------------------------------------------------------------------------*/
3132
3133// posts reads, and enables write queuing
3134
3135// precondition: never called in_interrupt
3136
3137static int usbnet_open (struct net_device *net)
3138{
3139 struct usbnet *dev = netdev_priv(net);
3140 int retval = 0;
3141 struct driver_info *info = dev->driver_info;
3142
3143 // put into "known safe" state
3144 if (info->reset && (retval = info->reset (dev)) < 0) {
3145 if (netif_msg_ifup (dev))
3146 devinfo (dev,
3147 "open reset fail (%d) usbnet usb-%s-%s, %s",
3148 retval,
3149 dev->udev->bus->bus_name, dev->udev->devpath,
3150 info->description);
3151 goto done;
3152 }
3153
3154 // insist peer be connected
3155 if (info->check_connect && (retval = info->check_connect (dev)) < 0) {
3156 if (netif_msg_ifup (dev))
3157 devdbg (dev, "can't open; %d", retval);
3158 goto done;
3159 }
3160
3161 /* start any status interrupt transfer */
3162 if (dev->interrupt) {
3163 retval = usb_submit_urb (dev->interrupt, GFP_KERNEL);
3164 if (retval < 0) {
3165 if (netif_msg_ifup (dev))
3166 deverr (dev, "intr submit %d", retval);
3167 goto done;
3168 }
3169 }
3170
3171 netif_start_queue (net);
3172 if (netif_msg_ifup (dev)) {
3173 char *framing;
3174
3175 if (dev->driver_info->flags & FLAG_FRAMING_NC)
3176 framing = "NetChip";
3177 else if (dev->driver_info->flags & FLAG_FRAMING_GL)
3178 framing = "GeneSys";
3179 else if (dev->driver_info->flags & FLAG_FRAMING_Z)
3180 framing = "Zaurus";
3181 else if (dev->driver_info->flags & FLAG_FRAMING_RN)
3182 framing = "RNDIS";
3183 else if (dev->driver_info->flags & FLAG_FRAMING_AX)
3184 framing = "ASIX";
3185 else
3186 framing = "simple";
3187
3188 devinfo (dev, "open: enable queueing "
3189 "(rx %d, tx %d) mtu %d %s framing",
3190 RX_QLEN (dev), TX_QLEN (dev), dev->net->mtu,
3191 framing);
3192 }
3193
3194 // delay posting reads until we're fully open
3195 tasklet_schedule (&dev->bh);
3196done:
3197 return retval;
3198}
3199
3200/*-------------------------------------------------------------------------*/
3201
3202static void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
3203{
3204 struct usbnet *dev = netdev_priv(net);
3205
3206 strncpy (info->driver, driver_name, sizeof info->driver);
3207 strncpy (info->version, DRIVER_VERSION, sizeof info->version);
3208 strncpy (info->fw_version, dev->driver_info->description,
3209 sizeof info->fw_version);
3210 usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info);
3211}
3212
3213static u32 usbnet_get_link (struct net_device *net)
3214{
3215 struct usbnet *dev = netdev_priv(net);
3216
f29fc259 3217 /* If a check_connect is defined, return its result */
1da177e4
LT		 3218 if (dev->driver_info->check_connect)
3219 return dev->driver_info->check_connect (dev) == 0;
3220
f29fc259 3221 /* Otherwise, say we're up (to avoid breaking scripts) */
1da177e4
LT		 3222 return 1;
3223}
3224
3225static u32 usbnet_get_msglevel (struct net_device *net)
3226{
3227 struct usbnet *dev = netdev_priv(net);
3228
3229 return dev->msg_enable;
3230}
3231
3232static void usbnet_set_msglevel (struct net_device *net, u32 level)
3233{
3234 struct usbnet *dev = netdev_priv(net);
3235
3236 dev->msg_enable = level;
3237}
3238
3239static int usbnet_ioctl (struct net_device *net, struct ifreq *rq, int cmd)
3240{
3241#ifdef NEED_MII
3242 {
3243 struct usbnet *dev = netdev_priv(net);
3244
3245 if (dev->mii.mdio_read != NULL && dev->mii.mdio_write != NULL)
3246 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
3247 }
3248#endif
3249 return -EOPNOTSUPP;
3250}
3251
3252/*-------------------------------------------------------------------------*/
3253
3254/* work that cannot be done in interrupt context uses keventd.
3255 *
3256 * NOTE: with 2.5 we could do more of this using completion callbacks,
3257 * especially now that control transfers can be queued.
3258 */
3259static void
3260kevent (void *data)
3261{
3262 struct usbnet *dev = data;
3263 int status;
3264
3265 /* usb_clear_halt() needs a thread context */
3266 if (test_bit (EVENT_TX_HALT, &dev->flags)) {
3267 unlink_urbs (dev, &dev->txq);
3268 status = usb_clear_halt (dev->udev, dev->out);
f29fc259
DB		 3269 if (status < 0
3270 && status != -EPIPE
3271 && status != -ESHUTDOWN) {
1da177e4
LT		 3272 if (netif_msg_tx_err (dev))
3273 deverr (dev, "can't clear tx halt, status %d",
3274 status);
3275 } else {
3276 clear_bit (EVENT_TX_HALT, &dev->flags);
f29fc259
DB		 3277 if (status != -ESHUTDOWN)
3278 netif_wake_queue (dev->net);
1da177e4
LT		 3279 }
3280 }
3281 if (test_bit (EVENT_RX_HALT, &dev->flags)) {
3282 unlink_urbs (dev, &dev->rxq);
3283 status = usb_clear_halt (dev->udev, dev->in);
f29fc259
DB		 3284 if (status < 0
3285 && status != -EPIPE
3286 && status != -ESHUTDOWN) {
1da177e4
LT		 3287 if (netif_msg_rx_err (dev))
3288 deverr (dev, "can't clear rx halt, status %d",
3289 status);
3290 } else {
3291 clear_bit (EVENT_RX_HALT, &dev->flags);
3292 tasklet_schedule (&dev->bh);
3293 }
3294 }
3295
3296 /* tasklet could resubmit itself forever if memory is tight */
3297 if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
3298 struct urb *urb = NULL;
3299
3300 if (netif_running (dev->net))
3301 urb = usb_alloc_urb (0, GFP_KERNEL);
3302 else
3303 clear_bit (EVENT_RX_MEMORY, &dev->flags);
3304 if (urb != NULL) {
3305 clear_bit (EVENT_RX_MEMORY, &dev->flags);
3306 rx_submit (dev, urb, GFP_KERNEL);
3307 tasklet_schedule (&dev->bh);
3308 }
3309 }
3310
7ea13c9c
DH		 3311 if (test_bit (EVENT_LINK_RESET, &dev->flags)) {
3312 struct driver_info *info = dev->driver_info;
3313 int retval = 0;
3314
3315 clear_bit (EVENT_LINK_RESET, &dev->flags);
3316 if(info->link_reset && (retval = info->link_reset(dev)) < 0) {
3317 devinfo(dev, "link reset failed (%d) usbnet usb-%s-%s, %s",
3318 retval,
3319 dev->udev->bus->bus_name, dev->udev->devpath,
3320 info->description);
3321 }
3322 }
3323
1da177e4
LT		 3324 if (dev->flags)
3325 devdbg (dev, "kevent done, flags = 0x%lx",
3326 dev->flags);
3327}
3328
3329/*-------------------------------------------------------------------------*/
3330
3331static void tx_complete (struct urb *urb, struct pt_regs *regs)
3332{
3333 struct sk_buff *skb = (struct sk_buff *) urb->context;
3334 struct skb_data *entry = (struct skb_data *) skb->cb;
3335 struct usbnet *dev = entry->dev;
3336
3337 if (urb->status == 0) {
3338 dev->stats.tx_packets++;
3339 dev->stats.tx_bytes += entry->length;
3340 } else {
3341 dev->stats.tx_errors++;
3342
3343 switch (urb->status) {
3344 case -EPIPE:
3345 defer_kevent (dev, EVENT_TX_HALT);
3346 break;
3347
3348 /* software-driven interface shutdown */
3349 case -ECONNRESET: // async unlink
3350 case -ESHUTDOWN: // hardware gone
3351 break;
3352
3353 // like rx, tx gets controller i/o faults during khubd delays
3354 // and so it uses the same throttling mechanism.
3355 case -EPROTO: // ehci
3356 case -ETIMEDOUT: // ohci
3357 case -EILSEQ: // uhci
3358 if (!timer_pending (&dev->delay)) {
3359 mod_timer (&dev->delay,
3360 jiffies + THROTTLE_JIFFIES);
3361 if (netif_msg_link (dev))
3362 devdbg (dev, "tx throttle %d",
3363 urb->status);
3364 }
3365 netif_stop_queue (dev->net);
3366 break;
3367 default:
3368 if (netif_msg_tx_err (dev))
3369 devdbg (dev, "tx err %d", entry->urb->status);
3370 break;
3371 }
3372 }
3373
3374 urb->dev = NULL;
3375 entry->state = tx_done;
8728b834 3376 defer_bh(dev, skb, &dev->txq);
1da177e4
LT		 3377}
3378
3379/*-------------------------------------------------------------------------*/
3380
3381static void usbnet_tx_timeout (struct net_device *net)
3382{
3383 struct usbnet *dev = netdev_priv(net);
3384
3385 unlink_urbs (dev, &dev->txq);
3386 tasklet_schedule (&dev->bh);
3387
3388 // FIXME: device recovery -- reset?
3389}
3390
3391/*-------------------------------------------------------------------------*/
3392
3393static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
3394{
3395 struct usbnet *dev = netdev_priv(net);
3396 int length;
3397 int retval = NET_XMIT_SUCCESS;
3398 struct urb *urb = NULL;
3399 struct skb_data *entry;
3400 struct driver_info *info = dev->driver_info;
3401 unsigned long flags;
3402#ifdef CONFIG_USB_NET1080
3403 struct nc_header *header = NULL;
3404 struct nc_trailer *trailer = NULL;
3405#endif /* CONFIG_USB_NET1080 */
3406
3407 // some devices want funky USB-level framing, for
3408 // win32 driver (usually) and/or hardware quirks
3409 if (info->tx_fixup) {
3410 skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
3411 if (!skb) {
3412 if (netif_msg_tx_err (dev))
3413 devdbg (dev, "can't tx_fixup skb");
3414 goto drop;
3415 }
3416 }
3417 length = skb->len;
3418
3419 if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) {
3420 if (netif_msg_tx_err (dev))
3421 devdbg (dev, "no urb");
3422 goto drop;
3423 }
3424
3425 entry = (struct skb_data *) skb->cb;
3426 entry->urb = urb;
3427 entry->dev = dev;
3428 entry->state = tx_start;
3429 entry->length = length;
3430
3431 // FIXME: reorganize a bit, so that fixup() fills out NetChip
3432 // framing too. (Packet ID update needs the spinlock...)
3433 // [ BETTER: we already own net->xmit_lock, that's enough ]
3434
3435#ifdef CONFIG_USB_NET1080
3436 if (info->flags & FLAG_FRAMING_NC) {
3437 header = (struct nc_header *) skb_push (skb, sizeof *header);
3438 header->hdr_len = cpu_to_le16 (sizeof (*header));
3439 header->packet_len = cpu_to_le16 (length);
3440 if (!((skb->len + sizeof *trailer) & 0x01))
3441 *skb_put (skb, 1) = PAD_BYTE;
3442 trailer = (struct nc_trailer *) skb_put (skb, sizeof *trailer);
3443 }
3444#endif /* CONFIG_USB_NET1080 */
3445
3446 usb_fill_bulk_urb (urb, dev->udev, dev->out,
3447 skb->data, skb->len, tx_complete, skb);
1da177e4
LT		 3448
3449 /* don't assume the hardware handles USB_ZERO_PACKET
3450 * NOTE: strictly conforming cdc-ether devices should expect
3451 * the ZLP here, but ignore the one-byte packet.
3452 *
3453 * FIXME zero that byte, if it doesn't require a new skb.
3454 */
3455 if ((length % dev->maxpacket) == 0)
3456 urb->transfer_buffer_length++;
3457
3458 spin_lock_irqsave (&dev->txq.lock, flags);
3459
3460#ifdef CONFIG_USB_NET1080
3461 if (info->flags & FLAG_FRAMING_NC) {
f29fc259 3462 header->packet_id = cpu_to_le16 ((u16)dev->xid++);
1da177e4
LT		 3463 put_unaligned (header->packet_id, &trailer->packet_id);
3464#if 0
3465 devdbg (dev, "frame >tx h %d p %d id %d",
3466 header->hdr_len, header->packet_len,
3467 header->packet_id);
3468#endif
3469 }
3470#endif /* CONFIG_USB_NET1080 */
3471
3472 switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) {
3473 case -EPIPE:
3474 netif_stop_queue (net);
3475 defer_kevent (dev, EVENT_TX_HALT);
3476 break;
3477 default:
3478 if (netif_msg_tx_err (dev))
3479 devdbg (dev, "tx: submit urb err %d", retval);
3480 break;
3481 case 0:
3482 net->trans_start = jiffies;
3483 __skb_queue_tail (&dev->txq, skb);
3484 if (dev->txq.qlen >= TX_QLEN (dev))
3485 netif_stop_queue (net);
3486 }
3487 spin_unlock_irqrestore (&dev->txq.lock, flags);
3488
3489 if (retval) {
3490 if (netif_msg_tx_err (dev))
3491 devdbg (dev, "drop, code %d", retval);
3492drop:
3493 retval = NET_XMIT_SUCCESS;
3494 dev->stats.tx_dropped++;
3495 if (skb)
3496 dev_kfree_skb_any (skb);
3497 usb_free_urb (urb);
3498 } else if (netif_msg_tx_queued (dev)) {
3499 devdbg (dev, "> tx, len %d, type 0x%x",
3500 length, skb->protocol);
3501 }
3502 return retval;
3503}
3504
3505
3506/*-------------------------------------------------------------------------*/
3507
3508// tasklet (work deferred from completions, in_irq) or timer
3509
3510static void usbnet_bh (unsigned long param)
3511{
3512 struct usbnet *dev = (struct usbnet *) param;
3513 struct sk_buff *skb;
3514 struct skb_data *entry;
3515
3516 while ((skb = skb_dequeue (&dev->done))) {
3517 entry = (struct skb_data *) skb->cb;
3518 switch (entry->state) {
3519 case rx_done:
3520 entry->state = rx_cleanup;
3521 rx_process (dev, skb);
3522 continue;
3523 case tx_done:
3524 case rx_cleanup:
3525 usb_free_urb (entry->urb);
3526 dev_kfree_skb (skb);
3527 continue;
3528 default:
3529 devdbg (dev, "bogus skb state %d", entry->state);
3530 }
3531 }
3532
3533 // waiting for all pending urbs to complete?
3534 if (dev->wait) {
3535 if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) {
3536 wake_up (dev->wait);
3537 }
3538
3539 // or are we maybe short a few urbs?
3540 } else if (netif_running (dev->net)
3541 && netif_device_present (dev->net)
3542 && !timer_pending (&dev->delay)
3543 && !test_bit (EVENT_RX_HALT, &dev->flags)) {
3544 int temp = dev->rxq.qlen;
3545 int qlen = RX_QLEN (dev);
3546
3547 if (temp < qlen) {
3548 struct urb *urb;
3549 int i;
3550
3551 // don't refill the queue all at once
3552 for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) {
3553 urb = usb_alloc_urb (0, GFP_ATOMIC);
3554 if (urb != NULL)
3555 rx_submit (dev, urb, GFP_ATOMIC);
3556 }
3557 if (temp != dev->rxq.qlen && netif_msg_link (dev))
3558 devdbg (dev, "rxqlen %d --> %d",
3559 temp, dev->rxq.qlen);
3560 if (dev->rxq.qlen < qlen)
3561 tasklet_schedule (&dev->bh);
3562 }
3563 if (dev->txq.qlen < TX_QLEN (dev))
3564 netif_wake_queue (dev->net);
3565 }
3566}
3567
3568
3569\f
3570/*-------------------------------------------------------------------------
3571 *
3572 * USB Device Driver support
3573 *
3574 *-------------------------------------------------------------------------*/
3575
3576// precondition: never called in_interrupt
3577
3578static void usbnet_disconnect (struct usb_interface *intf)
3579{
3580 struct usbnet *dev;
3581 struct usb_device *xdev;
3582 struct net_device *net;
3583
3584 dev = usb_get_intfdata(intf);
3585 usb_set_intfdata(intf, NULL);
3586 if (!dev)
3587 return;
3588
3589 xdev = interface_to_usbdev (intf);
3590
3591 if (netif_msg_probe (dev))
3592 devinfo (dev, "unregister usbnet usb-%s-%s, %s",
3593 xdev->bus->bus_name, xdev->devpath,
3594 dev->driver_info->description);
3595
3596 net = dev->net;
3597 unregister_netdev (net);
3598
3599 /* we don't hold rtnl here ... */
3600 flush_scheduled_work ();
3601
3602 if (dev->driver_info->unbind)
3603 dev->driver_info->unbind (dev, intf);
3604
3605 free_netdev(net);
3606 usb_put_dev (xdev);
3607}
3608
3609
3610/*-------------------------------------------------------------------------*/
3611
3612static struct ethtool_ops usbnet_ethtool_ops;
3613
3614// precondition: never called in_interrupt
3615
3616static int
3617usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
3618{
3619 struct usbnet *dev;
3620 struct net_device *net;
3621 struct usb_host_interface *interface;
3622 struct driver_info *info;
3623 struct usb_device *xdev;
3624 int status;
3625
3626 info = (struct driver_info *) prod->driver_info;
3627 if (!info) {
3628 dev_dbg (&udev->dev, "blacklisted by %s\n", driver_name);
3629 return -ENODEV;
3630 }
3631 xdev = interface_to_usbdev (udev);
3632 interface = udev->cur_altsetting;
3633
3634 usb_get_dev (xdev);
3635
3636 status = -ENOMEM;
3637
3638 // set up our own records
3639 net = alloc_etherdev(sizeof(*dev));
3640 if (!net) {
3641 dbg ("can't kmalloc dev");
3642 goto out;
3643 }
3644
3645 dev = netdev_priv(net);
3646 dev->udev = xdev;
3647 dev->driver_info = info;
3648 dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
3649 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
3650 skb_queue_head_init (&dev->rxq);
3651 skb_queue_head_init (&dev->txq);
3652 skb_queue_head_init (&dev->done);
3653 dev->bh.func = usbnet_bh;
3654 dev->bh.data = (unsigned long) dev;
3655 INIT_WORK (&dev->kevent, kevent, dev);
3656 dev->delay.function = usbnet_bh;
3657 dev->delay.data = (unsigned long) dev;
3658 init_timer (&dev->delay);
3659
3660 SET_MODULE_OWNER (net);
3661 dev->net = net;
3662 strcpy (net->name, "usb%d");
3663 memcpy (net->dev_addr, node_id, sizeof node_id);
f29fc259 3664 dev->hard_mtu = net->mtu + net->hard_header_len;
1da177e4
LT		 3665
3666#if 0
3667// dma_supported() is deeply broken on almost all architectures
3668 // possible with some EHCI controllers
3669 if (dma_supported (&udev->dev, DMA_64BIT_MASK))
3670 net->features |= NETIF_F_HIGHDMA;
3671#endif
3672
3673 net->change_mtu = usbnet_change_mtu;
3674 net->get_stats = usbnet_get_stats;
3675 net->hard_start_xmit = usbnet_start_xmit;
3676 net->open = usbnet_open;
3677 net->stop = usbnet_stop;
3678 net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
3679 net->tx_timeout = usbnet_tx_timeout;
3680 net->do_ioctl = usbnet_ioctl;
3681 net->ethtool_ops = &usbnet_ethtool_ops;
3682
3683 // allow device-specific bind/init procedures
3684 // NOTE net->name still not usable ...
3685 if (info->bind) {
3686 status = info->bind (dev, udev);
3687 // heuristic: "usb%d" for links we know are two-host,
3688 // else "eth%d" when there's reasonable doubt. userspace
3689 // can rename the link if it knows better.
3690 if ((dev->driver_info->flags & FLAG_ETHER) != 0
3691 && (net->dev_addr [0] & 0x02) == 0)
3692 strcpy (net->name, "eth%d");
f29fc259
DB		 3693
3694 /* maybe the remote can't receive an Ethernet MTU */
3695 if (net->mtu > (dev->hard_mtu - net->hard_header_len))
3696 net->mtu = dev->hard_mtu - net->hard_header_len;
1da177e4
LT		 3697 } else if (!info->in || info->out)
3698 status = get_endpoints (dev, udev);
3699 else {
3700 dev->in = usb_rcvbulkpipe (xdev, info->in);
3701 dev->out = usb_sndbulkpipe (xdev, info->out);
3702 if (!(info->flags & FLAG_NO_SETINT))
3703 status = usb_set_interface (xdev,
3704 interface->desc.bInterfaceNumber,
3705 interface->desc.bAlternateSetting);
3706 else
3707 status = 0;
3708
3709 }
1da177e4
LT		 3710 if (status == 0 && dev->status)
3711 status = init_status (dev, udev);
3712 if (status < 0)
3713 goto out1;
3714
3715 dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
3716
3717 SET_NETDEV_DEV(net, &udev->dev);
3718 status = register_netdev (net);
3719 if (status)
3720 goto out3;
3721 if (netif_msg_probe (dev))
3722 devinfo (dev, "register usbnet at usb-%s-%s, %s, "
3723 "%02x:%02x:%02x:%02x:%02x:%02x",
3724 xdev->bus->bus_name, xdev->devpath,
3725 dev->driver_info->description,
3726 net->dev_addr [0], net->dev_addr [1],
3727 net->dev_addr [2], net->dev_addr [3],
3728 net->dev_addr [4], net->dev_addr [5]);
3729
3730 // ok, it's ready to go.
3731 usb_set_intfdata (udev, dev);
3732
3733 // start as if the link is up
3734 netif_device_attach (net);
3735
3736 return 0;
3737
3738out3:
3739 if (info->unbind)
3740 info->unbind (dev, udev);
3741out1:
3742 free_netdev(net);
3743out:
3744 usb_put_dev(xdev);
3745 return status;
3746}
3747
3748/*-------------------------------------------------------------------------*/
3749
3750#ifdef CONFIG_PM
3751
27d72e85 3752static int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
1da177e4
LT		 3753{
3754 struct usbnet *dev = usb_get_intfdata(intf);
3755
27d72e85
DB		 3756 /* accelerate emptying of the rx and queues, to avoid
3757 * having everything error out.
3758 */
1da177e4 3759 netif_device_detach (dev->net);
27d72e85
DB		 3760 (void) unlink_urbs (dev, &dev->rxq);
3761 (void) unlink_urbs (dev, &dev->txq);
3762 intf->dev.power.power_state = PMSG_SUSPEND;
1da177e4
LT		 3763 return 0;
3764}
3765
3766static int usbnet_resume (struct usb_interface *intf)
3767{
3768 struct usbnet *dev = usb_get_intfdata(intf);
3769
27d72e85 3770 intf->dev.power.power_state = PMSG_ON;
1da177e4 3771 netif_device_attach (dev->net);
27d72e85 3772 tasklet_schedule (&dev->bh);
1da177e4
LT		 3773 return 0;
3774}
3775
3776#else /* !CONFIG_PM */
3777
3778#define usbnet_suspend NULL
3779#define usbnet_resume NULL
3780
3781#endif /* CONFIG_PM */
3782
3783/*-------------------------------------------------------------------------*/
3784
3785#ifndef HAVE_HARDWARE
3786#error You need to configure some hardware for this driver
3787#endif
3788
3789/*
3790 * chip vendor names won't normally be on the cables, and
3791 * may not be on the device.
3792 */
3793
3794static const struct usb_device_id products [] = {
3795
3796#ifdef CONFIG_USB_ALI_M5632
3797{
3798 USB_DEVICE (0x0402, 0x5632), // ALi defaults
3799 .driver_info = (unsigned long) &ali_m5632_info,
3800},
3801#endif
3802
3803#ifdef CONFIG_USB_AN2720
3804{
3805 USB_DEVICE (0x0547, 0x2720), // AnchorChips defaults
3806 .driver_info = (unsigned long) &an2720_info,
3807}, {
3808 USB_DEVICE (0x0547, 0x2727), // Xircom PGUNET
3809 .driver_info = (unsigned long) &an2720_info,
3810},
3811#endif
3812
3813#ifdef CONFIG_USB_BELKIN
3814{
3815 USB_DEVICE (0x050d, 0x0004), // Belkin
3816 .driver_info = (unsigned long) &belkin_info,
3817}, {
3818 USB_DEVICE (0x056c, 0x8100), // eTEK
3819 .driver_info = (unsigned long) &belkin_info,
3820}, {
3821 USB_DEVICE (0x0525, 0x9901), // Advance USBNET (eTEK)
3822 .driver_info = (unsigned long) &belkin_info,
3823},
3824#endif
3825
3826#ifdef CONFIG_USB_AX8817X
3827{
3828 // Linksys USB200M
3829 USB_DEVICE (0x077b, 0x2226),
3830 .driver_info = (unsigned long) &ax8817x_info,
3831}, {
3832 // Netgear FA120
3833 USB_DEVICE (0x0846, 0x1040),
3834 .driver_info = (unsigned long) &netgear_fa120_info,
3835}, {
3836 // DLink DUB-E100
3837 USB_DEVICE (0x2001, 0x1a00),
3838 .driver_info = (unsigned long) &dlink_dub_e100_info,
3839}, {
3840 // Intellinet, ST Lab USB Ethernet
3841 USB_DEVICE (0x0b95, 0x1720),
3842 .driver_info = (unsigned long) &ax8817x_info,
3843}, {
3844 // Hawking UF200, TrendNet TU2-ET100
3845 USB_DEVICE (0x07b8, 0x420a),
3846 .driver_info = (unsigned long) &hawking_uf200_info,
3847}, {
3848 // Billionton Systems, USB2AR
3849 USB_DEVICE (0x08dd, 0x90ff),
3850 .driver_info = (unsigned long) &ax8817x_info,
3851}, {
3852 // ATEN UC210T
3853 USB_DEVICE (0x0557, 0x2009),
3854 .driver_info = (unsigned long) &ax8817x_info,
3855}, {
3856 // Buffalo LUA-U2-KTX
3857 USB_DEVICE (0x0411, 0x003d),
3858 .driver_info = (unsigned long) &ax8817x_info,
3859}, {
3860 // Sitecom LN-029 "USB 2.0 10/100 Ethernet adapter"
3861 USB_DEVICE (0x6189, 0x182d),
3862 .driver_info = (unsigned long) &ax8817x_info,
3863}, {
3864 // corega FEther USB2-TX
3865 USB_DEVICE (0x07aa, 0x0017),
3866 .driver_info = (unsigned long) &ax8817x_info,
3867}, {
3868 // Surecom EP-1427X-2
3869 USB_DEVICE (0x1189, 0x0893),
3870 .driver_info = (unsigned long) &ax8817x_info,
3871}, {
3872 // goodway corp usb gwusb2e
3873 USB_DEVICE (0x1631, 0x6200),
3874 .driver_info = (unsigned long) &ax8817x_info,
3875}, {
3876 // ASIX AX88772 10/100
3877 USB_DEVICE (0x0b95, 0x7720),
3878 .driver_info = (unsigned long) &ax88772_info,
3879},
3880#endif
3881
3882#ifdef CONFIG_USB_EPSON2888
3883{
3884 USB_DEVICE (0x0525, 0x2888), // EPSON USB client
3885 .driver_info = (unsigned long) &epson2888_info,
3886},
3887#endif
3888
3889#ifdef CONFIG_USB_GENESYS
3890{
3891 USB_DEVICE (0x05e3, 0x0502), // GL620USB-A
3892 .driver_info = (unsigned long) &genelink_info,
3893},
3894 /* NOT: USB_DEVICE (0x05e3, 0x0501), // GL620USB
3895 * that's half duplex, not currently supported
3896 */
3897#endif
3898
3899#ifdef CONFIG_USB_NET1080
3900{
3901 USB_DEVICE (0x0525, 0x1080), // NetChip ref design
3902 .driver_info = (unsigned long) &net1080_info,
3903}, {
3904 USB_DEVICE (0x06D0, 0x0622), // Laplink Gold
3905 .driver_info = (unsigned long) &net1080_info,
3906},
3907#endif
3908
3909#ifdef CONFIG_USB_PL2301
3910{
3911 USB_DEVICE (0x067b, 0x0000), // PL-2301
3912 .driver_info = (unsigned long) &prolific_info,
3913}, {
3914 USB_DEVICE (0x067b, 0x0001), // PL-2302
3915 .driver_info = (unsigned long) &prolific_info,
3916},
3917#endif
3918
3919#ifdef CONFIG_USB_KC2190
3920{
3921 USB_DEVICE (0x050f, 0x0190), // KC-190
3922 .driver_info = (unsigned long) &kc2190_info,
3923},
3924#endif
3925
3926#ifdef CONFIG_USB_RNDIS
3927{
3928 /* RNDIS is MSFT's un-official variant of CDC ACM */
3929 USB_INTERFACE_INFO (USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
3930 .driver_info = (unsigned long) &rndis_info,
3931},
3932#endif
3933
3934#ifdef CONFIG_USB_ARMLINUX
3935/*
3936 * SA-1100 using standard ARM Linux kernels, or compatible.
3937 * Often used when talking to Linux PDAs (iPaq, Yopy, etc).
3938 * The sa-1100 "usb-eth" driver handles the basic framing.
3939 *
3940 * PXA25x or PXA210 ... these use a "usb-eth" driver much like
3941 * the sa1100 one, but hardware uses different endpoint numbers.
3942 *
3943 * Or the Linux "Ethernet" gadget on hardware that can't talk
3944 * CDC Ethernet (e.g., no altsettings), in either of two modes:
3945 * - acting just like the old "usb-eth" firmware, though
3946 * the implementation is different
3947 * - supporting RNDIS as the first/default configuration for
3948 * MS-Windows interop; Linux needs to use the other config
3949 */
3950{
3951 // 1183 = 0x049F, both used as hex values?
3952 // Compaq "Itsy" vendor/product id
3953 USB_DEVICE (0x049F, 0x505A), // usb-eth, or compatible
3954 .driver_info = (unsigned long) &linuxdev_info,
3955}, {
3956 USB_DEVICE (0x0E7E, 0x1001), // G.Mate "Yopy"
3957 .driver_info = (unsigned long) &yopy_info,
3958}, {
3959 USB_DEVICE (0x8086, 0x07d3), // "blob" bootloader
3960 .driver_info = (unsigned long) &blob_info,
3961}, {
3962 // Linux Ethernet/RNDIS gadget on pxa210/25x/26x
3963 // e.g. Gumstix, current OpenZaurus, ...
3964 USB_DEVICE_VER (0x0525, 0xa4a2, 0x0203, 0x0203),
3965 .driver_info = (unsigned long) &linuxdev_info,
3966},
3967#endif
3968
3969#if defined(CONFIG_USB_ZAURUS) || defined(CONFIG_USB_CDCETHER)
3970/*
3971 * SA-1100 based Sharp Zaurus ("collie"), or compatible.
3972 * Same idea as above, but different framing.
3973 *
3974 * PXA-2xx based models are also lying-about-cdc.
3975 * Some models don't even tell the same lies ...
3976 *
3977 * NOTE: OpenZaurus versions with 2.6 kernels won't use these entries,
3978 * unlike the older ones with 2.4 "embedix" kernels.
3979 *
3980 * NOTE: These entries do double-duty, serving as blacklist entries
3981 * whenever Zaurus support isn't enabled, but CDC Ethernet is.
3982 */
3983#define ZAURUS_MASTER_INTERFACE \
3984 .bInterfaceClass = USB_CLASS_COMM, \
3985 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, \
3986 .bInterfaceProtocol = USB_CDC_PROTO_NONE
3987{
3988 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
3989 | USB_DEVICE_ID_MATCH_DEVICE,
3990 .idVendor = 0x04DD,
3991 .idProduct = 0x8004,
3992 ZAURUS_MASTER_INTERFACE,
3993 .driver_info = ZAURUS_STRONGARM_INFO,
3994}, {
3995 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
3996 | USB_DEVICE_ID_MATCH_DEVICE,
3997 .idVendor = 0x04DD,
3998 .idProduct = 0x8005, /* A-300 */
3999 ZAURUS_MASTER_INTERFACE,
4000 .driver_info = ZAURUS_PXA_INFO,
4001}, {
4002 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4003 | USB_DEVICE_ID_MATCH_DEVICE,
4004 .idVendor = 0x04DD,
4005 .idProduct = 0x8006, /* B-500/SL-5600 */
4006 ZAURUS_MASTER_INTERFACE,
4007 .driver_info = ZAURUS_PXA_INFO,
4008}, {
4009 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4010 | USB_DEVICE_ID_MATCH_DEVICE,
4011 .idVendor = 0x04DD,
4012 .idProduct = 0x8007, /* C-700 */
4013 ZAURUS_MASTER_INTERFACE,
4014 .driver_info = ZAURUS_PXA_INFO,
4015}, {
4016 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4017 | USB_DEVICE_ID_MATCH_DEVICE,
4018 .idVendor = 0x04DD,
4019 .idProduct = 0x9031, /* C-750 C-760 */
4020 ZAURUS_MASTER_INTERFACE,
4021 .driver_info = ZAURUS_PXA_INFO,
4022}, {
4023 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4024 | USB_DEVICE_ID_MATCH_DEVICE,
4025 .idVendor = 0x04DD,
4026 .idProduct = 0x9032, /* SL-6000 */
4027 ZAURUS_MASTER_INTERFACE,
4028 .driver_info = ZAURUS_PXA_INFO,
4029}, {
4030 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4031 | USB_DEVICE_ID_MATCH_DEVICE,
4032 .idVendor = 0x04DD,
4033 /* reported with some C860 units */
4034 .idProduct = 0x9050, /* C-860 */
4035 ZAURUS_MASTER_INTERFACE,
4036 .driver_info = ZAURUS_PXA_INFO,
a2fe2012
DB		 4037},
4038
1da177e4 4039#ifdef CONFIG_USB_ZAURUS
f3fae6ed
DB		 4040 /* At least some (reports vary) PXA units have very different lies
4041 * about their standards support: they claim to be cell phones with
4042 * direct access to their radios. (They don't conform to CDC MDLM.)
1da177e4 4043 */
a2fe2012 4044{
f3fae6ed
DB		 4045 USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
4046 USB_CDC_PROTO_NONE),
4047 .driver_info = (unsigned long) &bogus_mdlm_info,
1da177e4 4048},
a2fe2012 4049#endif
1da177e4
LT		 4050
4051/* Olympus has some models with a Zaurus-compatible option.
4052 * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
4053 */
4054{
4055 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4056 | USB_DEVICE_ID_MATCH_DEVICE,
4057 .idVendor = 0x07B4,
4058 .idProduct = 0x0F02, /* R-1000 */
4059 ZAURUS_MASTER_INTERFACE,
4060 .driver_info = OLYMPUS_MXL_INFO,
4061},
4062#endif
4063
4064#ifdef CONFIG_USB_CDCETHER
4065{
4066 /* CDC Ether uses two interfaces, not necessarily consecutive.
4067 * We match the main interface, ignoring the optional device
4068 * class so we could handle devices that aren't exclusively
4069 * CDC ether.
4070 *
4071 * NOTE: this match must come AFTER entries working around
4072 * bugs/quirks in a given product (like Zaurus, above).
4073 */
4074 USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
4075 USB_CDC_PROTO_NONE),
4076 .driver_info = (unsigned long) &cdc_info,
4077},
4078#endif
4079
4080 { }, // END
4081};
4082MODULE_DEVICE_TABLE (usb, products);
4083
4084static struct usb_driver usbnet_driver = {
4085 .owner = THIS_MODULE,
4086 .name = driver_name,
4087 .id_table = products,
4088 .probe = usbnet_probe,
4089 .disconnect = usbnet_disconnect,
4090 .suspend = usbnet_suspend,
4091 .resume = usbnet_resume,
4092};
4093
4094/* Default ethtool_ops assigned. Devices can override in their bind() routine */
4095static struct ethtool_ops usbnet_ethtool_ops = {
4096 .get_drvinfo = usbnet_get_drvinfo,
4097 .get_link = usbnet_get_link,
4098 .get_msglevel = usbnet_get_msglevel,
4099 .set_msglevel = usbnet_set_msglevel,
4100};
4101
4102/*-------------------------------------------------------------------------*/
4103
f29fc259 4104static int __init usbnet_init(void)
1da177e4
LT		 4105{
4106 // compiler should optimize these out
4107 BUG_ON (sizeof (((struct sk_buff *)0)->cb)
4108 < sizeof (struct skb_data));
4109#ifdef CONFIG_USB_CDCETHER
4110 BUG_ON ((sizeof (((struct usbnet *)0)->data)
4111 < sizeof (struct cdc_state)));
4112#endif
4113
4114 random_ether_addr(node_id);
4115
4116 return usb_register(&usbnet_driver);
4117}
f29fc259 4118module_init(usbnet_init);
1da177e4 4119
f29fc259 4120static void __exit usbnet_exit(void)
1da177e4 4121{
f29fc259 4122 usb_deregister(&usbnet_driver);
1da177e4 4123}
f29fc259 4124module_exit(usbnet_exit);
1da177e4 4125
f29fc259
DB		 4126MODULE_AUTHOR("David Brownell");
4127MODULE_DESCRIPTION("USB Host-to-Host Link Drivers (numerous vendors)");
4128MODULE_LICENSE("GPL");
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