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ttydev: Fix up compile failures in the PPC build
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / serial / io_ti.c
CommitLineData
1da177e4
LT		 1/*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
14 *
15 * For questions or problems with this driver, contact Inside Out
16 * Networks technical support, or Peter Berger <pberger@brimson.com>,
17 * or Al Borchers <alborchers@steinerpoint.com>.
18 *
19 * Version history:
20 *
2742fd88
AC		 21 * July 11, 2002 Removed 4 port device structure since all TI UMP
22 * chips have only 2 ports
1da177e4
LT		 23 * David Iacovelli (davidi@ionetworks.com)
24 *
25 */
26
1da177e4
LT		 27#include <linux/kernel.h>
28#include <linux/jiffies.h>
29#include <linux/errno.h>
30#include <linux/init.h>
31#include <linux/slab.h>
32#include <linux/tty.h>
33#include <linux/tty_driver.h>
34#include <linux/tty_flip.h>
35#include <linux/module.h>
36#include <linux/spinlock.h>
241ca64f 37#include <linux/mutex.h>
1da177e4
LT		 38#include <linux/serial.h>
39#include <linux/ioctl.h>
d12b219a 40#include <linux/firmware.h>
2742fd88 41#include <linux/uaccess.h>
1da177e4 42#include <linux/usb.h>
a969888c 43#include <linux/usb/serial.h>
1da177e4 44
1da177e4
LT		 45#include "io_16654.h"
46#include "io_usbvend.h"
47#include "io_ti.h"
48
49/*
50 * Version Information
51 */
fc4cbd75 52#define DRIVER_VERSION "v0.7mode043006"
1da177e4
LT		 53#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
54#define DRIVER_DESC "Edgeport USB Serial Driver"
55
1da177e4
LT		 56#define EPROM_PAGE_SIZE 64
57
58
59struct edgeport_uart_buf_desc {
2742fd88 60 __u32 count; /* Number of bytes currently in buffer */
1da177e4
LT		 61};
62
63/* different hardware types */
64#define HARDWARE_TYPE_930 0
65#define HARDWARE_TYPE_TIUMP 1
66
2742fd88
AC		 67/* IOCTL_PRIVATE_TI_GET_MODE Definitions */
68#define TI_MODE_CONFIGURING 0 /* Device has not entered start device */
69#define TI_MODE_BOOT 1 /* Staying in boot mode */
70#define TI_MODE_DOWNLOAD 2 /* Made it to download mode */
71#define TI_MODE_TRANSITIONING 3 /* Currently in boot mode but
72 transitioning to download mode */
1da177e4
LT		 73
74/* read urb state */
75#define EDGE_READ_URB_RUNNING 0
76#define EDGE_READ_URB_STOPPING 1
77#define EDGE_READ_URB_STOPPED 2
78
79#define EDGE_LOW_LATENCY 1
80#define EDGE_CLOSING_WAIT 4000 /* in .01 sec */
81
82#define EDGE_OUT_BUF_SIZE 1024
83
84
85/* Product information read from the Edgeport */
2742fd88
AC		 86struct product_info {
87 int TiMode; /* Current TI Mode */
88 __u8 hardware_type; /* Type of hardware */
1da177e4
LT		 89} __attribute__((packed));
90
91/* circular buffer */
92struct edge_buf {
93 unsigned int buf_size;
94 char *buf_buf;
95 char *buf_get;
96 char *buf_put;
97};
98
99struct edgeport_port {
100 __u16 uart_base;
101 __u16 dma_address;
102 __u8 shadow_msr;
103 __u8 shadow_mcr;
104 __u8 shadow_lsr;
105 __u8 lsr_mask;
106 __u32 ump_read_timeout; /* Number of miliseconds the UMP will
107 wait without data before completing
108 a read short */
109 int baud_rate;
110 int close_pending;
111 int lsr_event;
112 struct edgeport_uart_buf_desc tx;
113 struct async_icount icount;
114 wait_queue_head_t delta_msr_wait; /* for handling sleeping while
115 waiting for msr change to
116 happen */
117 struct edgeport_serial *edge_serial;
118 struct usb_serial_port *port;
2742fd88 119 __u8 bUartMode; /* Port type, 0: RS232, etc. */
1da177e4
LT		 120 spinlock_t ep_lock;
121 int ep_read_urb_state;
122 int ep_write_urb_in_use;
123 struct edge_buf *ep_out_buf;
124};
125
126struct edgeport_serial {
127 struct product_info product_info;
2742fd88
AC		 128 u8 TI_I2C_Type; /* Type of I2C in UMP */
129 u8 TiReadI2C; /* Set to TRUE if we have read the
130 I2c in Boot Mode */
241ca64f 131 struct mutex es_lock;
1da177e4
LT		 132 int num_ports_open;
133 struct usb_serial *serial;
134};
135
136
137/* Devices that this driver supports */
138static struct usb_device_id edgeport_1port_id_table [] = {
139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
155 { }
156};
157
158static struct usb_device_id edgeport_2port_id_table [] = {
159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
fc4cbd75 171 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
1da177e4 172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
fc4cbd75
MP		 173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
1da177e4
LT		 177 { }
178};
179
180/* Devices that this driver supports */
181static struct usb_device_id id_table_combined [] = {
182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
fc4cbd75
MP		 211 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
212 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
213 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
214 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
1da177e4
LT		 215 { }
216};
217
2742fd88 218MODULE_DEVICE_TABLE(usb, id_table_combined);
1da177e4
LT		 219
220static struct usb_driver io_driver = {
1da177e4
LT		 221 .name = "io_ti",
222 .probe = usb_serial_probe,
223 .disconnect = usb_serial_disconnect,
224 .id_table = id_table_combined,
ba9dc657 225 .no_dynamic_id = 1,
1da177e4
LT		 226};
227
228
d12b219a
JS		 229static unsigned char OperationalMajorVersion;
230static unsigned char OperationalMinorVersion;
231static unsigned short OperationalBuildNumber;
1da177e4
LT		 232
233static int debug;
234
1da177e4
LT		 235static int low_latency = EDGE_LOW_LATENCY;
236static int closing_wait = EDGE_CLOSING_WAIT;
2742fd88
AC		 237static int ignore_cpu_rev;
238static int default_uart_mode; /* RS232 */
1da177e4 239
2742fd88
AC		 240static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
241 unsigned char *data, int length);
1da177e4
LT		 242
243static void stop_read(struct edgeport_port *edge_port);
244static int restart_read(struct edgeport_port *edge_port);
245
2742fd88
AC		 246static void edge_set_termios(struct usb_serial_port *port,
247 struct ktermios *old_termios);
1da177e4
LT		 248static void edge_send(struct usb_serial_port *port);
249
fc4cbd75
MP		 250/* sysfs attributes */
251static int edge_create_sysfs_attrs(struct usb_serial_port *port);
252static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
253
1da177e4
LT		 254/* circular buffer */
255static struct edge_buf *edge_buf_alloc(unsigned int size);
256static void edge_buf_free(struct edge_buf *eb);
257static void edge_buf_clear(struct edge_buf *eb);
258static unsigned int edge_buf_data_avail(struct edge_buf *eb);
259static unsigned int edge_buf_space_avail(struct edge_buf *eb);
260static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
261 unsigned int count);
262static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
263 unsigned int count);
264
265
2742fd88
AC		 266static int ti_vread_sync(struct usb_device *dev, __u8 request,
267 __u16 value, __u16 index, u8 *data, int size)
1da177e4
LT		 268{
269 int status;
270
2742fd88
AC		 271 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
272 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
273 value, index, data, size, 1000);
1da177e4
LT		 274 if (status < 0)
275 return status;
276 if (status != size) {
2742fd88
AC		 277 dbg("%s - wanted to write %d, but only wrote %d",
278 __func__, size, status);
1da177e4
LT		 279 return -ECOMM;
280 }
281 return 0;
282}
283
2742fd88
AC		 284static int ti_vsend_sync(struct usb_device *dev, __u8 request,
285 __u16 value, __u16 index, u8 *data, int size)
1da177e4
LT		 286{
287 int status;
288
2742fd88
AC		 289 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
290 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
291 value, index, data, size, 1000);
1da177e4
LT		 292 if (status < 0)
293 return status;
294 if (status != size) {
2742fd88 295 dbg("%s - wanted to write %d, but only wrote %d",
441b62c1 296 __func__, size, status);
1da177e4
LT		 297 return -ECOMM;
298 }
299 return 0;
300}
301
2742fd88 302static int send_cmd(struct usb_device *dev, __u8 command,
1da177e4
LT		 303 __u8 moduleid, __u16 value, u8 *data,
304 int size)
305{
2742fd88 306 return ti_vsend_sync(dev, command, value, moduleid, data, size);
1da177e4
LT		 307}
308
309/* clear tx/rx buffers and fifo in TI UMP */
2742fd88 310static int purge_port(struct usb_serial_port *port, __u16 mask)
1da177e4
LT		 311{
312 int port_number = port->number - port->serial->minor;
313
2742fd88 314 dbg("%s - port %d, mask %x", __func__, port_number, mask);
1da177e4 315
2742fd88 316 return send_cmd(port->serial->dev,
1da177e4
LT		 317 UMPC_PURGE_PORT,
318 (__u8)(UMPM_UART1_PORT + port_number),
319 mask,
320 NULL,
321 0);
322}
323
324/**
2742fd88 325 * read_download_mem - Read edgeport memory from TI chip
1da177e4
LT		 326 * @dev: usb device pointer
327 * @start_address: Device CPU address at which to read
328 * @length: Length of above data
329 * @address_type: Can read both XDATA and I2C
330 * @buffer: pointer to input data buffer
331 */
2742fd88 332static int read_download_mem(struct usb_device *dev, int start_address,
1da177e4
LT		 333 int length, __u8 address_type, __u8 *buffer)
334{
335 int status = 0;
336 __u8 read_length;
337 __be16 be_start_address;
2742fd88
AC		 338
339 dbg("%s - @ %x for %d", __func__, start_address, length);
1da177e4
LT		 340
341 /* Read in blocks of 64 bytes
342 * (TI firmware can't handle more than 64 byte reads)
343 */
344 while (length) {
345 if (length > 64)
2742fd88 346 read_length = 64;
1da177e4
LT		 347 else
348 read_length = (__u8)length;
349
350 if (read_length > 1) {
2742fd88 351 dbg("%s - @ %x for %d", __func__,
1da177e4
LT		 352 start_address, read_length);
353 }
2742fd88
AC		 354 be_start_address = cpu_to_be16(start_address);
355 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
356 (__u16)address_type,
357 (__force __u16)be_start_address,
358 buffer, read_length);
1da177e4
LT		 359
360 if (status) {
2742fd88 361 dbg("%s - ERROR %x", __func__, status);
1da177e4
LT		 362 return status;
363 }
364
2742fd88 365 if (read_length > 1)
441b62c1 366 usb_serial_debug_data(debug, &dev->dev, __func__,
1da177e4 367 read_length, buffer);
1da177e4
LT		 368
369 /* Update pointers/length */
370 start_address += read_length;
371 buffer += read_length;
372 length -= read_length;
373 }
2742fd88 374
1da177e4
LT		 375 return status;
376}
377
2742fd88
AC		 378static int read_ram(struct usb_device *dev, int start_address,
379 int length, __u8 *buffer)
1da177e4 380{
2742fd88
AC		 381 return read_download_mem(dev, start_address, length,
382 DTK_ADDR_SPACE_XDATA, buffer);
1da177e4
LT		 383}
384
385/* Read edgeport memory to a given block */
2742fd88
AC		 386static int read_boot_mem(struct edgeport_serial *serial,
387 int start_address, int length, __u8 *buffer)
1da177e4
LT		 388{
389 int status = 0;
390 int i;
391
2742fd88
AC		 392 for (i = 0; i < length; i++) {
393 status = ti_vread_sync(serial->serial->dev,
394 UMPC_MEMORY_READ, serial->TI_I2C_Type,
395 (__u16)(start_address+i), &buffer[i], 0x01);
1da177e4 396 if (status) {
2742fd88 397 dbg("%s - ERROR %x", __func__, status);
1da177e4
LT		 398 return status;
399 }
400 }
401
2742fd88
AC		 402 dbg("%s - start_address = %x, length = %d",
403 __func__, start_address, length);
404 usb_serial_debug_data(debug, &serial->serial->dev->dev,
405 __func__, length, buffer);
1da177e4
LT		 406
407 serial->TiReadI2C = 1;
408
409 return status;
410}
411
412/* Write given block to TI EPROM memory */
2742fd88
AC		 413static int write_boot_mem(struct edgeport_serial *serial,
414 int start_address, int length, __u8 *buffer)
1da177e4
LT		 415{
416 int status = 0;
417 int i;
418 __u8 temp;
419
420 /* Must do a read before write */
421 if (!serial->TiReadI2C) {
2742fd88 422 status = read_boot_mem(serial, 0, 1, &temp);
1da177e4
LT		 423 if (status)
424 return status;
425 }
426
2742fd88
AC		 427 for (i = 0; i < length; ++i) {
428 status = ti_vsend_sync(serial->serial->dev,
429 UMPC_MEMORY_WRITE, buffer[i],
430 (__u16)(i + start_address), NULL, 0);
1da177e4
LT		 431 if (status)
432 return status;
433 }
434
2742fd88
AC		 435 dbg("%s - start_sddr = %x, length = %d",
436 __func__, start_address, length);
437 usb_serial_debug_data(debug, &serial->serial->dev->dev,
438 __func__, length, buffer);
1da177e4
LT		 439
440 return status;
441}
442
443
444/* Write edgeport I2C memory to TI chip */
2742fd88
AC		 445static int write_i2c_mem(struct edgeport_serial *serial,
446 int start_address, int length, __u8 address_type, __u8 *buffer)
1da177e4
LT		 447{
448 int status = 0;
449 int write_length;
450 __be16 be_start_address;
451
452 /* We can only send a maximum of 1 aligned byte page at a time */
2742fd88 453
1da177e4 454 /* calulate the number of bytes left in the first page */
2742fd88
AC		 455 write_length = EPROM_PAGE_SIZE -
456 (start_address & (EPROM_PAGE_SIZE - 1));
1da177e4
LT		 457
458 if (write_length > length)
459 write_length = length;
460
2742fd88
AC		 461 dbg("%s - BytesInFirstPage Addr = %x, length = %d",
462 __func__, start_address, write_length);
463 usb_serial_debug_data(debug, &serial->serial->dev->dev,
464 __func__, write_length, buffer);
1da177e4
LT		 465
466 /* Write first page */
2742fd88
AC		 467 be_start_address = cpu_to_be16(start_address);
468 status = ti_vsend_sync(serial->serial->dev,
469 UMPC_MEMORY_WRITE, (__u16)address_type,
470 (__force __u16)be_start_address,
471 buffer, write_length);
1da177e4 472 if (status) {
2742fd88 473 dbg("%s - ERROR %d", __func__, status);
1da177e4
LT		 474 return status;
475 }
476
477 length -= write_length;
478 start_address += write_length;
479 buffer += write_length;
480
2742fd88
AC		 481 /* We should be aligned now -- can write
482 max page size bytes at a time */
1da177e4
LT		 483 while (length) {
484 if (length > EPROM_PAGE_SIZE)
485 write_length = EPROM_PAGE_SIZE;
486 else
487 write_length = length;
488
2742fd88
AC		 489 dbg("%s - Page Write Addr = %x, length = %d",
490 __func__, start_address, write_length);
491 usb_serial_debug_data(debug, &serial->serial->dev->dev,
492 __func__, write_length, buffer);
1da177e4
LT		 493
494 /* Write next page */
2742fd88
AC		 495 be_start_address = cpu_to_be16(start_address);
496 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
497 (__u16)address_type,
498 (__force __u16)be_start_address,
499 buffer, write_length);
1da177e4 500 if (status) {
2742fd88
AC		 501 dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
502 __func__, status);
1da177e4
LT		 503 return status;
504 }
2742fd88 505
1da177e4
LT		 506 length -= write_length;
507 start_address += write_length;
508 buffer += write_length;
509 }
510 return status;
511}
512
513/* Examine the UMP DMA registers and LSR
2742fd88 514 *
1da177e4
LT		 515 * Check the MSBit of the X and Y DMA byte count registers.
516 * A zero in this bit indicates that the TX DMA buffers are empty
517 * then check the TX Empty bit in the UART.
518 */
2742fd88 519static int tx_active(struct edgeport_port *port)
1da177e4
LT		 520{
521 int status;
522 struct out_endpoint_desc_block *oedb;
523 __u8 *lsr;
524 int bytes_left = 0;
525
2742fd88 526 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
1da177e4 527 if (!oedb) {
2742fd88 528 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
1da177e4
LT		 529 return -ENOMEM;
530 }
531
2742fd88 532 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte,
1da177e4
LT		 533 as not all platforms can do DMA
534 from stack */
535 if (!lsr) {
536 kfree(oedb);
537 return -ENOMEM;
538 }
539 /* Read the DMA Count Registers */
2742fd88
AC		 540 status = read_ram(port->port->serial->dev, port->dma_address,
541 sizeof(*oedb), (void *)oedb);
1da177e4
LT		 542 if (status)
543 goto exit_is_tx_active;
544
2742fd88 545 dbg("%s - XByteCount 0x%X", __func__, oedb->XByteCount);
1da177e4
LT		 546
547 /* and the LSR */
2742fd88
AC		 548 status = read_ram(port->port->serial->dev,
549 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
1da177e4
LT		 550
551 if (status)
552 goto exit_is_tx_active;
2742fd88
AC		 553 dbg("%s - LSR = 0x%X", __func__, *lsr);
554
1da177e4 555 /* If either buffer has data or we are transmitting then return TRUE */
2742fd88 556 if ((oedb->XByteCount & 0x80) != 0)
1da177e4
LT		 557 bytes_left += 64;
558
2742fd88 559 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
1da177e4
LT		 560 bytes_left += 1;
561
562 /* We return Not Active if we get any kind of error */
563exit_is_tx_active:
2742fd88 564 dbg("%s - return %d", __func__, bytes_left);
1da177e4
LT		 565
566 kfree(lsr);
567 kfree(oedb);
568 return bytes_left;
569}
570
2742fd88
AC		 571static void chase_port(struct edgeport_port *port, unsigned long timeout,
572 int flush)
1da177e4
LT		 573{
574 int baud_rate;
575 struct tty_struct *tty = port->port->tty;
576 wait_queue_t wait;
577 unsigned long flags;
578
579 if (!timeout)
2742fd88 580 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
1da177e4
LT		 581
582 /* wait for data to drain from the buffer */
583 spin_lock_irqsave(&port->ep_lock, flags);
584 init_waitqueue_entry(&wait, current);
585 add_wait_queue(&tty->write_wait, &wait);
586 for (;;) {
587 set_current_state(TASK_INTERRUPTIBLE);
588 if (edge_buf_data_avail(port->ep_out_buf) == 0
589 || timeout == 0 || signal_pending(current)
2742fd88
AC		 590 || !usb_get_intfdata(port->port->serial->interface))
591 /* disconnect */
1da177e4
LT		 592 break;
593 spin_unlock_irqrestore(&port->ep_lock, flags);
594 timeout = schedule_timeout(timeout);
595 spin_lock_irqsave(&port->ep_lock, flags);
596 }
597 set_current_state(TASK_RUNNING);
598 remove_wait_queue(&tty->write_wait, &wait);
599 if (flush)
600 edge_buf_clear(port->ep_out_buf);
601 spin_unlock_irqrestore(&port->ep_lock, flags);
602
603 /* wait for data to drain from the device */
604 timeout += jiffies;
605 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
2742fd88
AC		 606 && usb_get_intfdata(port->port->serial->interface)) {
607 /* not disconnected */
608 if (!tx_active(port))
1da177e4
LT		 609 break;
610 msleep(10);
611 }
612
613 /* disconnected */
614 if (!usb_get_intfdata(port->port->serial->interface))
615 return;
616
617 /* wait one more character time, based on baud rate */
2742fd88
AC		 618 /* (tx_active doesn't seem to wait for the last byte) */
619 baud_rate = port->baud_rate;
620 if (baud_rate == 0)
1da177e4 621 baud_rate = 50;
dfa5ec79 622 msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
1da177e4
LT		 623}
624
2742fd88 625static int choose_config(struct usb_device *dev)
1da177e4 626{
2742fd88
AC		 627 /*
628 * There may be multiple configurations on this device, in which case
629 * we would need to read and parse all of them to find out which one
630 * we want. However, we just support one config at this point,
631 * configuration # 1, which is Config Descriptor 0.
632 */
1da177e4 633
2742fd88
AC		 634 dbg("%s - Number of Interfaces = %d",
635 __func__, dev->config->desc.bNumInterfaces);
636 dbg("%s - MAX Power = %d",
637 __func__, dev->config->desc.bMaxPower * 2);
1da177e4
LT		 638
639 if (dev->config->desc.bNumInterfaces != 1) {
2742fd88
AC		 640 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
641 __func__);
1da177e4
LT		 642 return -ENODEV;
643 }
644
645 return 0;
646}
647
2742fd88
AC		 648static int read_rom(struct edgeport_serial *serial,
649 int start_address, int length, __u8 *buffer)
1da177e4
LT		 650{
651 int status;
652
653 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
2742fd88 654 status = read_download_mem(serial->serial->dev,
1da177e4
LT		 655 start_address,
656 length,
657 serial->TI_I2C_Type,
658 buffer);
659 } else {
2742fd88
AC		 660 status = read_boot_mem(serial, start_address, length,
661 buffer);
1da177e4 662 }
1da177e4
LT		 663 return status;
664}
665
2742fd88
AC		 666static int write_rom(struct edgeport_serial *serial, int start_address,
667 int length, __u8 *buffer)
1da177e4
LT		 668{
669 if (serial->product_info.TiMode == TI_MODE_BOOT)
2742fd88
AC		 670 return write_boot_mem(serial, start_address, length,
671 buffer);
1da177e4
LT		 672
673 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
2742fd88
AC		 674 return write_i2c_mem(serial, start_address, length,
675 serial->TI_I2C_Type, buffer);
1da177e4
LT		 676 return -EINVAL;
677}
678
679
680
681/* Read a descriptor header from I2C based on type */
2742fd88
AC		 682static int get_descriptor_addr(struct edgeport_serial *serial,
683 int desc_type, struct ti_i2c_desc *rom_desc)
1da177e4
LT		 684{
685 int start_address;
686 int status;
687
688 /* Search for requested descriptor in I2C */
689 start_address = 2;
690 do {
2742fd88 691 status = read_rom(serial,
1da177e4
LT		 692 start_address,
693 sizeof(struct ti_i2c_desc),
2742fd88 694 (__u8 *)rom_desc);
1da177e4
LT		 695 if (status)
696 return 0;
697
698 if (rom_desc->Type == desc_type)
699 return start_address;
700
2742fd88
AC		 701 start_address = start_address + sizeof(struct ti_i2c_desc)
702 + rom_desc->Size;
1da177e4
LT		 703
704 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
2742fd88 705
1da177e4
LT		 706 return 0;
707}
708
709/* Validate descriptor checksum */
2742fd88 710static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
1da177e4
LT		 711{
712 __u16 i;
713 __u8 cs = 0;
714
2742fd88 715 for (i = 0; i < rom_desc->Size; i++)
1da177e4 716 cs = (__u8)(cs + buffer[i]);
2742fd88 717
1da177e4 718 if (cs != rom_desc->CheckSum) {
2742fd88 719 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
1da177e4
LT		 720 return -EINVAL;
721 }
722 return 0;
723}
724
725/* Make sure that the I2C image is good */
2742fd88 726static int check_i2c_image(struct edgeport_serial *serial)
1da177e4
LT		 727{
728 struct device *dev = &serial->serial->dev->dev;
729 int status = 0;
730 struct ti_i2c_desc *rom_desc;
731 int start_address = 2;
732 __u8 *buffer;
733 __u16 ttype;
734
2742fd88 735 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1da177e4 736 if (!rom_desc) {
2742fd88 737 dev_err(dev, "%s - out of memory\n", __func__);
1da177e4
LT		 738 return -ENOMEM;
739 }
2742fd88 740 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
1da177e4 741 if (!buffer) {
2742fd88
AC		 742 dev_err(dev, "%s - out of memory when allocating buffer\n",
743 __func__);
744 kfree(rom_desc);
1da177e4
LT		 745 return -ENOMEM;
746 }
747
2742fd88
AC		 748 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
749 status = read_rom(serial, 0, 1, buffer);
1da177e4 750 if (status)
2742fd88 751 goto out;
1da177e4
LT		 752
753 if (*buffer != UMP5152 && *buffer != UMP3410) {
2742fd88 754 dev_err(dev, "%s - invalid buffer signature\n", __func__);
1da177e4 755 status = -ENODEV;
2742fd88 756 goto out;
1da177e4
LT		 757 }
758
759 do {
2742fd88
AC		 760 /* Validate the I2C */
761 status = read_rom(serial,
1da177e4
LT		 762 start_address,
763 sizeof(struct ti_i2c_desc),
764 (__u8 *)rom_desc);
765 if (status)
766 break;
767
2742fd88
AC		 768 if ((start_address + sizeof(struct ti_i2c_desc) +
769 rom_desc->Size) > TI_MAX_I2C_SIZE) {
1da177e4 770 status = -ENODEV;
2742fd88 771 dbg("%s - structure too big, erroring out.", __func__);
1da177e4
LT		 772 break;
773 }
774
2742fd88 775 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
1da177e4 776
2742fd88 777 /* Skip type 2 record */
1da177e4 778 ttype = rom_desc->Type & 0x0f;
2742fd88
AC		 779 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
780 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
781 /* Read the descriptor data */
782 status = read_rom(serial, start_address +
783 sizeof(struct ti_i2c_desc),
784 rom_desc->Size, buffer);
1da177e4
LT		 785 if (status)
786 break;
787
2742fd88 788 status = valid_csum(rom_desc, buffer);
1da177e4
LT		 789 if (status)
790 break;
791 }
2742fd88
AC		 792 start_address = start_address + sizeof(struct ti_i2c_desc) +
793 rom_desc->Size;
1da177e4 794
2742fd88
AC		 795 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
796 (start_address < TI_MAX_I2C_SIZE));
1da177e4 797
2742fd88
AC		 798 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
799 (start_address > TI_MAX_I2C_SIZE))
1da177e4
LT		 800 status = -ENODEV;
801
2742fd88
AC		 802out:
803 kfree(buffer);
804 kfree(rom_desc);
1da177e4
LT		 805 return status;
806}
807
2742fd88 808static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
1da177e4
LT		 809{
810 int status;
811 int start_address;
812 struct ti_i2c_desc *rom_desc;
813 struct edge_ti_manuf_descriptor *desc;
814
2742fd88 815 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1da177e4 816 if (!rom_desc) {
2742fd88
AC		 817 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
818 __func__);
1da177e4
LT		 819 return -ENOMEM;
820 }
2742fd88
AC		 821 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
822 rom_desc);
1da177e4
LT		 823
824 if (!start_address) {
2742fd88 825 dbg("%s - Edge Descriptor not found in I2C", __func__);
1da177e4
LT		 826 status = -ENODEV;
827 goto exit;
828 }
829
2742fd88
AC		 830 /* Read the descriptor data */
831 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
832 rom_desc->Size, buffer);
1da177e4
LT		 833 if (status)
834 goto exit;
2742fd88
AC		 835
836 status = valid_csum(rom_desc, buffer);
837
1da177e4 838 desc = (struct edge_ti_manuf_descriptor *)buffer;
2742fd88
AC		 839 dbg("%s - IonConfig 0x%x", __func__, desc->IonConfig);
840 dbg("%s - Version %d", __func__, desc->Version);
841 dbg("%s - Cpu/Board 0x%x", __func__, desc->CpuRev_BoardRev);
842 dbg("%s - NumPorts %d", __func__, desc->NumPorts);
843 dbg("%s - NumVirtualPorts %d", __func__, desc->NumVirtualPorts);
844 dbg("%s - TotalPorts %d", __func__, desc->TotalPorts);
1da177e4
LT		 845
846exit:
2742fd88 847 kfree(rom_desc);
1da177e4
LT		 848 return status;
849}
850
851/* Build firmware header used for firmware update */
2742fd88 852static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
1da177e4
LT		 853{
854 __u8 *buffer;
855 int buffer_size;
856 int i;
d12b219a 857 int err;
1da177e4
LT		 858 __u8 cs = 0;
859 struct ti_i2c_desc *i2c_header;
860 struct ti_i2c_image_header *img_header;
861 struct ti_i2c_firmware_rec *firmware_rec;
d12b219a
JS		 862 const struct firmware *fw;
863 const char *fw_name = "edgeport/down3.bin";
1da177e4 864
2742fd88
AC		 865 /* In order to update the I2C firmware we must change the type 2 record
866 * to type 0xF2. This will force the UMP to come up in Boot Mode.
867 * Then while in boot mode, the driver will download the latest
868 * firmware (padded to 15.5k) into the UMP ram. And finally when the
869 * device comes back up in download mode the driver will cause the new
870 * firmware to be copied from the UMP Ram to I2C and the firmware will
871 * update the record type from 0xf2 to 0x02.
872 */
873
874 /* Allocate a 15.5k buffer + 2 bytes for version number
875 * (Firmware Record) */
876 buffer_size = (((1024 * 16) - 512 ) +
877 sizeof(struct ti_i2c_firmware_rec));
878
879 buffer = kmalloc(buffer_size, GFP_KERNEL);
1da177e4 880 if (!buffer) {
2742fd88 881 dev_err(dev, "%s - out of memory\n", __func__);
1da177e4
LT		 882 return -ENOMEM;
883 }
2742fd88 884
1da177e4 885 // Set entire image of 0xffs
2742fd88 886 memset(buffer, 0xff, buffer_size);
1da177e4 887
d12b219a
JS		 888 err = request_firmware(&fw, fw_name, dev);
889 if (err) {
890 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
891 fw_name, err);
892 kfree(buffer);
893 return err;
894 }
895
896 /* Save Download Version Number */
897 OperationalMajorVersion = fw->data[0];
898 OperationalMinorVersion = fw->data[1];
899 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
900
2742fd88 901 /* Copy version number into firmware record */
1da177e4
LT		 902 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
903
d12b219a
JS		 904 firmware_rec->Ver_Major = OperationalMajorVersion;
905 firmware_rec->Ver_Minor = OperationalMinorVersion;
1da177e4 906
2742fd88 907 /* Pointer to fw_down memory image */
d12b219a 908 img_header = (struct ti_i2c_image_header *)&fw->data[4];
1da177e4 909
2742fd88 910 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
d12b219a 911 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
1da177e4
LT		 912 le16_to_cpu(img_header->Length));
913
d12b219a
JS		 914 release_firmware(fw);
915
1da177e4
LT		 916 for (i=0; i < buffer_size; i++) {
917 cs = (__u8)(cs + buffer[i]);
918 }
919
2742fd88 920 kfree(buffer);
1da177e4 921
2742fd88 922 /* Build new header */
1da177e4
LT		 923 i2c_header = (struct ti_i2c_desc *)header;
924 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
2742fd88 925
1da177e4
LT		 926 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
927 i2c_header->Size = (__u16)buffer_size;
928 i2c_header->CheckSum = cs;
d12b219a
JS		 929 firmware_rec->Ver_Major = OperationalMajorVersion;
930 firmware_rec->Ver_Minor = OperationalMinorVersion;
1da177e4
LT		 931
932 return 0;
933}
934
935/* Try to figure out what type of I2c we have */
2742fd88 936static int i2c_type_bootmode(struct edgeport_serial *serial)
1da177e4
LT		 937{
938 int status;
939 __u8 data;
2742fd88
AC		 940
941 /* Try to read type 2 */
942 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
943 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01);
1da177e4 944 if (status)
2742fd88 945 dbg("%s - read 2 status error = %d", __func__, status);
1da177e4 946 else
2742fd88 947 dbg("%s - read 2 data = 0x%x", __func__, data);
1da177e4 948 if ((!status) && (data == UMP5152 || data == UMP3410)) {
2742fd88 949 dbg("%s - ROM_TYPE_II", __func__);
1da177e4
LT		 950 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
951 return 0;
952 }
953
2742fd88
AC		 954 /* Try to read type 3 */
955 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
956 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01);
1da177e4 957 if (status)
2742fd88 958 dbg("%s - read 3 status error = %d", __func__, status);
1da177e4 959 else
2742fd88 960 dbg("%s - read 2 data = 0x%x", __func__, data);
1da177e4 961 if ((!status) && (data == UMP5152 || data == UMP3410)) {
2742fd88 962 dbg("%s - ROM_TYPE_III", __func__);
1da177e4
LT		 963 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
964 return 0;
965 }
966
2742fd88 967 dbg("%s - Unknown", __func__);
1da177e4
LT		 968 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
969 return -ENODEV;
970}
971
2742fd88
AC		 972static int bulk_xfer(struct usb_serial *serial, void *buffer,
973 int length, int *num_sent)
1da177e4
LT		 974{
975 int status;
976
2742fd88
AC		 977 status = usb_bulk_msg(serial->dev,
978 usb_sndbulkpipe(serial->dev,
979 serial->port[0]->bulk_out_endpointAddress),
980 buffer, length, num_sent, 1000);
1da177e4
LT		 981 return status;
982}
983
984/* Download given firmware image to the device (IN BOOT MODE) */
2742fd88
AC		 985static int download_code(struct edgeport_serial *serial, __u8 *image,
986 int image_length)
1da177e4
LT		 987{
988 int status = 0;
989 int pos;
990 int transfer;
991 int done;
992
2742fd88 993 /* Transfer firmware image */
1da177e4 994 for (pos = 0; pos < image_length; ) {
2742fd88 995 /* Read the next buffer from file */
1da177e4
LT		 996 transfer = image_length - pos;
997 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
998 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
999
2742fd88
AC		 1000 /* Transfer data */
1001 status = bulk_xfer(serial->serial, &image[pos],
1002 transfer, &done);
1da177e4
LT		 1003 if (status)
1004 break;
2742fd88 1005 /* Advance buffer pointer */
1da177e4
LT		 1006 pos += done;
1007 }
1008
1009 return status;
1010}
1011
2742fd88
AC		 1012/* FIXME!!! */
1013static int config_boot_dev(struct usb_device *dev)
1da177e4
LT		 1014{
1015 return 0;
1016}
1017
2742fd88
AC		 1018static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1019{
1020 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1021}
1022
1da177e4
LT		 1023/**
1024 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
2742fd88 1025 *
1da177e4
LT		 1026 * This routine downloads the main operating code into the TI5052, using the
1027 * boot code already burned into E2PROM or ROM.
1028 */
2742fd88 1029static int download_fw(struct edgeport_serial *serial)
1da177e4
LT		 1030{
1031 struct device *dev = &serial->serial->dev->dev;
1032 int status = 0;
1033 int start_address;
1034 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1035 struct usb_interface_descriptor *interface;
1036 int download_cur_ver;
1037 int download_new_ver;
1038
1039 /* This routine is entered by both the BOOT mode and the Download mode
1040 * We can determine which code is running by the reading the config
1041 * descriptor and if we have only one bulk pipe it is in boot mode
1042 */
1043 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1044
1045 /* Default to type 2 i2c */
1046 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1047
2742fd88 1048 status = choose_config(serial->serial->dev);
1da177e4
LT		 1049 if (status)
1050 return status;
1051
1052 interface = &serial->serial->interface->cur_altsetting->desc;
1053 if (!interface) {
2742fd88 1054 dev_err(dev, "%s - no interface set, error!\n", __func__);
1da177e4
LT		 1055 return -ENODEV;
1056 }
1057
2742fd88
AC		 1058 /*
1059 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1060 * if we have more than one endpoint we are definitely in download
1061 * mode
1062 */
1da177e4
LT		 1063 if (interface->bNumEndpoints > 1)
1064 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1065 else
2742fd88 1066 /* Otherwise we will remain in configuring mode */
1da177e4
LT		 1067 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1068
1da177e4
LT		 1069 /********************************************************************/
1070 /* Download Mode */
1071 /********************************************************************/
1072 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1073 struct ti_i2c_desc *rom_desc;
1074
9544e833 1075 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1da177e4 1076
2742fd88 1077 status = check_i2c_image(serial);
1da177e4 1078 if (status) {
9544e833 1079 dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1da177e4
LT		 1080 return status;
1081 }
2742fd88 1082
1da177e4
LT		 1083 /* Validate Hardware version number
1084 * Read Manufacturing Descriptor from TI Based Edgeport
1085 */
2742fd88 1086 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1da177e4 1087 if (!ti_manuf_desc) {
2742fd88 1088 dev_err(dev, "%s - out of memory.\n", __func__);
1da177e4
LT		 1089 return -ENOMEM;
1090 }
2742fd88 1091 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1da177e4 1092 if (status) {
2742fd88 1093 kfree(ti_manuf_desc);
1da177e4
LT		 1094 return status;
1095 }
1096
2742fd88
AC		 1097 /* Check version number of ION descriptor */
1098 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1099 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1100 __func__, ti_cpu_rev(ti_manuf_desc));
1101 kfree(ti_manuf_desc);
1102 return -EINVAL;
1103 }
1da177e4 1104
2742fd88 1105 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1da177e4 1106 if (!rom_desc) {
2742fd88
AC		 1107 dev_err(dev, "%s - out of memory.\n", __func__);
1108 kfree(ti_manuf_desc);
1da177e4
LT		 1109 return -ENOMEM;
1110 }
1111
2742fd88
AC		 1112 /* Search for type 2 record (firmware record) */
1113 start_address = get_descriptor_addr(serial,
1114 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1115 if (start_address != 0) {
1da177e4
LT		 1116 struct ti_i2c_firmware_rec *firmware_version;
1117 __u8 record;
1118
2742fd88
AC		 1119 dbg("%s - Found Type FIRMWARE (Type 2) record",
1120 __func__);
1da177e4 1121
2742fd88
AC		 1122 firmware_version = kmalloc(sizeof(*firmware_version),
1123 GFP_KERNEL);
1da177e4 1124 if (!firmware_version) {
2742fd88
AC		 1125 dev_err(dev, "%s - out of memory.\n", __func__);
1126 kfree(rom_desc);
1127 kfree(ti_manuf_desc);
1da177e4
LT		 1128 return -ENOMEM;
1129 }
1130
2742fd88
AC		 1131 /* Validate version number
1132 * Read the descriptor data
1133 */
1134 status = read_rom(serial, start_address +
1135 sizeof(struct ti_i2c_desc),
1da177e4
LT		 1136 sizeof(struct ti_i2c_firmware_rec),
1137 (__u8 *)firmware_version);
1138 if (status) {
2742fd88
AC		 1139 kfree(firmware_version);
1140 kfree(rom_desc);
1141 kfree(ti_manuf_desc);
1da177e4
LT		 1142 return status;
1143 }
1144
2742fd88
AC		 1145 /* Check version number of download with current
1146 version in I2c */
1147 download_cur_ver = (firmware_version->Ver_Major << 8) +
1da177e4 1148 (firmware_version->Ver_Minor);
d12b219a
JS		 1149 download_new_ver = (OperationalMajorVersion << 8) +
1150 (OperationalMinorVersion);
1da177e4 1151
2742fd88
AC		 1152 dbg("%s - >> FW Versions Device %d.%d Driver %d.%d",
1153 __func__,
1154 firmware_version->Ver_Major,
1155 firmware_version->Ver_Minor,
1156 OperationalMajorVersion,
1157 OperationalMinorVersion);
1da177e4 1158
2742fd88
AC		 1159 /* Check if we have an old version in the I2C and
1160 update if necessary */
1da177e4 1161 if (download_cur_ver != download_new_ver) {
2742fd88
AC		 1162 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1163 __func__,
1164 firmware_version->Ver_Major,
1165 firmware_version->Ver_Minor,
1166 OperationalMajorVersion,
1167 OperationalMinorVersion);
1168
1169 /* In order to update the I2C firmware we must
1170 * change the type 2 record to type 0xF2. This
1171 * will force the UMP to come up in Boot Mode.
1172 * Then while in boot mode, the driver will
1173 * download the latest firmware (padded to
1174 * 15.5k) into the UMP ram. Finally when the
1175 * device comes back up in download mode the
1176 * driver will cause the new firmware to be
1177 * copied from the UMP Ram to I2C and the
1178 * firmware will update the record type from
1179 * 0xf2 to 0x02.
1180 */
1da177e4
LT		 1181 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1182
2742fd88
AC		 1183 /* Change the I2C Firmware record type to
1184 0xf2 to trigger an update */
1185 status = write_rom(serial, start_address,
1186 sizeof(record), &record);
1da177e4 1187 if (status) {
2742fd88
AC		 1188 kfree(firmware_version);
1189 kfree(rom_desc);
1190 kfree(ti_manuf_desc);
1da177e4
LT		 1191 return status;
1192 }
1193
2742fd88
AC		 1194 /* verify the write -- must do this in order
1195 * for write to complete before we do the
1196 * hardware reset
1197 */
1198 status = read_rom(serial,
1da177e4
LT		 1199 start_address,
1200 sizeof(record),
1201 &record);
1da177e4 1202 if (status) {
2742fd88
AC		 1203 kfree(firmware_version);
1204 kfree(rom_desc);
1205 kfree(ti_manuf_desc);
1da177e4
LT		 1206 return status;
1207 }
1208
1209 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
2742fd88
AC		 1210 dev_err(dev,
1211 "%s - error resetting device\n",
1212 __func__);
1213 kfree(firmware_version);
1214 kfree(rom_desc);
1215 kfree(ti_manuf_desc);
1da177e4
LT		 1216 return -ENODEV;
1217 }
1218
2742fd88 1219 dbg("%s - HARDWARE RESET", __func__);
1da177e4 1220
2742fd88
AC		 1221 /* Reset UMP -- Back to BOOT MODE */
1222 status = ti_vsend_sync(serial->serial->dev,
1223 UMPC_HARDWARE_RESET,
1224 0, 0, NULL, 0);
1da177e4 1225
2742fd88
AC		 1226 dbg("%s - HARDWARE RESET return %d",
1227 __func__, status);
1da177e4
LT		 1228
1229 /* return an error on purpose. */
2742fd88
AC		 1230 kfree(firmware_version);
1231 kfree(rom_desc);
1232 kfree(ti_manuf_desc);
1da177e4
LT		 1233 return -ENODEV;
1234 }
2742fd88 1235 kfree(firmware_version);
1da177e4 1236 }
2742fd88
AC		 1237 /* Search for type 0xF2 record (firmware blank record) */
1238 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1239#define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1240 sizeof(struct ti_i2c_firmware_rec))
1da177e4
LT		 1241 __u8 *header;
1242 __u8 *vheader;
1243
2742fd88 1244 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1da177e4 1245 if (!header) {
2742fd88
AC		 1246 dev_err(dev, "%s - out of memory.\n", __func__);
1247 kfree(rom_desc);
1248 kfree(ti_manuf_desc);
1da177e4
LT		 1249 return -ENOMEM;
1250 }
2742fd88
AC		 1251
1252 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1da177e4 1253 if (!vheader) {
2742fd88
AC		 1254 dev_err(dev, "%s - out of memory.\n", __func__);
1255 kfree(header);
1256 kfree(rom_desc);
1257 kfree(ti_manuf_desc);
1da177e4
LT		 1258 return -ENOMEM;
1259 }
2742fd88
AC		 1260
1261 dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1262 __func__);
1263
1264 /*
1265 * In order to update the I2C firmware we must change
1266 * the type 2 record to type 0xF2. This will force the
1267 * UMP to come up in Boot Mode. Then while in boot
1268 * mode, the driver will download the latest firmware
1269 * (padded to 15.5k) into the UMP ram. Finally when the
1270 * device comes back up in download mode the driver
1271 * will cause the new firmware to be copied from the
1272 * UMP Ram to I2C and the firmware will update the
1273 * record type from 0xf2 to 0x02.
1274 */
1275 status = build_i2c_fw_hdr(header, dev);
1da177e4 1276 if (status) {
2742fd88
AC		 1277 kfree(vheader);
1278 kfree(header);
1279 kfree(rom_desc);
1280 kfree(ti_manuf_desc);
1da177e4
LT		 1281 return status;
1282 }
1283
2742fd88
AC		 1284 /* Update I2C with type 0xf2 record with correct
1285 size and checksum */
1286 status = write_rom(serial,
1da177e4
LT		 1287 start_address,
1288 HEADER_SIZE,
1289 header);
1290 if (status) {
2742fd88
AC		 1291 kfree(vheader);
1292 kfree(header);
1293 kfree(rom_desc);
1294 kfree(ti_manuf_desc);
1da177e4
LT		 1295 return status;
1296 }
1297
2742fd88
AC		 1298 /* verify the write -- must do this in order for
1299 write to complete before we do the hardware reset */
1300 status = read_rom(serial, start_address,
1301 HEADER_SIZE, vheader);
1da177e4
LT		 1302
1303 if (status) {
2742fd88
AC		 1304 dbg("%s - can't read header back", __func__);
1305 kfree(vheader);
1306 kfree(header);
1307 kfree(rom_desc);
1308 kfree(ti_manuf_desc);
1da177e4
LT		 1309 return status;
1310 }
1311 if (memcmp(vheader, header, HEADER_SIZE)) {
2742fd88
AC		 1312 dbg("%s - write download record failed",
1313 __func__);
1314 kfree(vheader);
1315 kfree(header);
1316 kfree(rom_desc);
1317 kfree(ti_manuf_desc);
1da177e4
LT		 1318 return status;
1319 }
1320
2742fd88
AC		 1321 kfree(vheader);
1322 kfree(header);
1da177e4 1323
2742fd88 1324 dbg("%s - Start firmware update", __func__);
1da177e4 1325
2742fd88
AC		 1326 /* Tell firmware to copy download image into I2C */
1327 status = ti_vsend_sync(serial->serial->dev,
1328 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1da177e4 1329
2742fd88 1330 dbg("%s - Update complete 0x%x", __func__, status);
1da177e4 1331 if (status) {
2742fd88
AC		 1332 dev_err(dev,
1333 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1334 __func__);
1335 kfree(rom_desc);
1336 kfree(ti_manuf_desc);
1da177e4
LT		 1337 return status;
1338 }
1339 }
1340
1341 // The device is running the download code
2742fd88
AC		 1342 kfree(rom_desc);
1343 kfree(ti_manuf_desc);
1da177e4
LT		 1344 return 0;
1345 }
1346
1347 /********************************************************************/
1348 /* Boot Mode */
1349 /********************************************************************/
9544e833 1350 dbg("%s - RUNNING IN BOOT MODE", __func__);
1da177e4 1351
2742fd88
AC		 1352 /* Configure the TI device so we can use the BULK pipes for download */
1353 status = config_boot_dev(serial->serial->dev);
1da177e4
LT		 1354 if (status)
1355 return status;
1356
2742fd88
AC		 1357 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1358 != USB_VENDOR_ID_ION) {
1359 dbg("%s - VID = 0x%x", __func__,
1da177e4
LT		 1360 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1361 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
2742fd88 1362 goto stayinbootmode;
1da177e4
LT		 1363 }
1364
2742fd88
AC		 1365 /* We have an ION device (I2c Must be programmed)
1366 Determine I2C image type */
1367 if (i2c_type_bootmode(serial))
1368 goto stayinbootmode;
1da177e4 1369
2742fd88
AC		 1370 /* Check for ION Vendor ID and that the I2C is valid */
1371 if (!check_i2c_image(serial)) {
1da177e4
LT		 1372 struct ti_i2c_image_header *header;
1373 int i;
1374 __u8 cs = 0;
1375 __u8 *buffer;
1376 int buffer_size;
d12b219a
JS		 1377 int err;
1378 const struct firmware *fw;
1379 const char *fw_name = "edgeport/down3.bin";
1da177e4
LT		 1380
1381 /* Validate Hardware version number
1382 * Read Manufacturing Descriptor from TI Based Edgeport
1383 */
2742fd88 1384 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1da177e4 1385 if (!ti_manuf_desc) {
2742fd88 1386 dev_err(dev, "%s - out of memory.\n", __func__);
1da177e4
LT		 1387 return -ENOMEM;
1388 }
2742fd88 1389 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1da177e4 1390 if (status) {
2742fd88
AC		 1391 kfree(ti_manuf_desc);
1392 goto stayinbootmode;
1da177e4
LT		 1393 }
1394
2742fd88
AC		 1395 /* Check for version 2 */
1396 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1397 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1398 __func__, ti_cpu_rev(ti_manuf_desc));
1399 kfree(ti_manuf_desc);
1400 goto stayinbootmode;
1da177e4
LT		 1401 }
1402
2742fd88 1403 kfree(ti_manuf_desc);
1da177e4 1404
1da177e4 1405 /*
2742fd88
AC		 1406 * In order to update the I2C firmware we must change the type
1407 * 2 record to type 0xF2. This will force the UMP to come up
1408 * in Boot Mode. Then while in boot mode, the driver will
1409 * download the latest firmware (padded to 15.5k) into the
1410 * UMP ram. Finally when the device comes back up in download
1411 * mode the driver will cause the new firmware to be copied
1412 * from the UMP Ram to I2C and the firmware will update the
1413 * record type from 0xf2 to 0x02.
1414 *
1da177e4
LT		 1415 * Do we really have to copy the whole firmware image,
1416 * or could we do this in place!
1417 */
1418
2742fd88
AC		 1419 /* Allocate a 15.5k buffer + 3 byte header */
1420 buffer_size = (((1024 * 16) - 512) +
1421 sizeof(struct ti_i2c_image_header));
1422 buffer = kmalloc(buffer_size, GFP_KERNEL);
1da177e4 1423 if (!buffer) {
2742fd88 1424 dev_err(dev, "%s - out of memory\n", __func__);
1da177e4
LT		 1425 return -ENOMEM;
1426 }
2742fd88
AC		 1427
1428 /* Initialize the buffer to 0xff (pad the buffer) */
1429 memset(buffer, 0xff, buffer_size);
1da177e4 1430
d12b219a
JS		 1431 err = request_firmware(&fw, fw_name, dev);
1432 if (err) {
1433 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1434 fw_name, err);
1435 kfree(buffer);
1436 return err;
1437 }
1438 memcpy(buffer, &fw->data[4], fw->size - 4);
1439 release_firmware(fw);
1da177e4 1440
2742fd88
AC		 1441 for (i = sizeof(struct ti_i2c_image_header);
1442 i < buffer_size; i++) {
1da177e4
LT		 1443 cs = (__u8)(cs + buffer[i]);
1444 }
2742fd88 1445
1da177e4 1446 header = (struct ti_i2c_image_header *)buffer;
2742fd88
AC		 1447
1448 /* update length and checksum after padding */
1449 header->Length = cpu_to_le16((__u16)(buffer_size -
1450 sizeof(struct ti_i2c_image_header)));
1da177e4
LT		 1451 header->CheckSum = cs;
1452
2742fd88
AC		 1453 /* Download the operational code */
1454 dbg("%s - Downloading operational code image (TI UMP)",
1455 __func__);
1456 status = download_code(serial, buffer, buffer_size);
1da177e4 1457
2742fd88 1458 kfree(buffer);
1da177e4
LT		 1459
1460 if (status) {
2742fd88
AC		 1461 dbg("%s - Error downloading operational code image",
1462 __func__);
1da177e4
LT		 1463 return status;
1464 }
1465
2742fd88 1466 /* Device will reboot */
1da177e4
LT		 1467 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1468
2742fd88
AC		 1469 dbg("%s - Download successful -- Device rebooting...",
1470 __func__);
1da177e4
LT		 1471
1472 /* return an error on purpose */
1473 return -ENODEV;
1474 }
1475
2742fd88
AC		 1476stayinbootmode:
1477 /* Eprom is invalid or blank stay in boot mode */
9544e833 1478 dbg("%s - STAYING IN BOOT MODE", __func__);
1da177e4
LT		 1479 serial->product_info.TiMode = TI_MODE_BOOT;
1480
1481 return 0;
1482}
1483
1484
2742fd88 1485static int ti_do_config(struct edgeport_port *port, int feature, int on)
1da177e4
LT		 1486{
1487 int port_number = port->port->number - port->port->serial->minor;
2742fd88
AC		 1488 on = !!on; /* 1 or 0 not bitmask */
1489 return send_cmd(port->port->serial->dev,
1490 feature, (__u8)(UMPM_UART1_PORT + port_number),
1491 on, NULL, 0);
1da177e4
LT		 1492}
1493
1da177e4 1494
2742fd88 1495static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1da177e4
LT		 1496{
1497 int status = 0;
1498
2742fd88 1499 dbg("%s - %x", __func__, mcr);
1da177e4 1500
2742fd88 1501 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1da177e4
LT		 1502 if (status)
1503 return status;
2742fd88 1504 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1da177e4
LT		 1505 if (status)
1506 return status;
2742fd88 1507 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1da177e4
LT		 1508}
1509
1da177e4 1510/* Convert TI LSR to standard UART flags */
2742fd88 1511static __u8 map_line_status(__u8 ti_lsr)
1da177e4
LT		 1512{
1513 __u8 lsr = 0;
1514
1515#define MAP_FLAG(flagUmp, flagUart) \
1516 if (ti_lsr & flagUmp) \
1517 lsr |= flagUart;
1518
1519 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1520 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1521 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1522 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
2742fd88
AC		 1523 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1524 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1da177e4
LT		 1525
1526#undef MAP_FLAG
1527
1528 return lsr;
1529}
1530
2742fd88 1531static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1da177e4
LT		 1532{
1533 struct async_icount *icount;
1534 struct tty_struct *tty;
1535
2742fd88 1536 dbg("%s - %02x", __func__, msr);
1da177e4 1537
2742fd88
AC		 1538 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1539 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1da177e4
LT		 1540 icount = &edge_port->icount;
1541
1542 /* update input line counters */
1543 if (msr & EDGEPORT_MSR_DELTA_CTS)
1544 icount->cts++;
1545 if (msr & EDGEPORT_MSR_DELTA_DSR)
1546 icount->dsr++;
1547 if (msr & EDGEPORT_MSR_DELTA_CD)
1548 icount->dcd++;
1549 if (msr & EDGEPORT_MSR_DELTA_RI)
1550 icount->rng++;
2742fd88 1551 wake_up_interruptible(&edge_port->delta_msr_wait);
1da177e4
LT		 1552 }
1553
1554 /* Save the new modem status */
1555 edge_port->shadow_msr = msr & 0xf0;
1556
1557 tty = edge_port->port->tty;
1558 /* handle CTS flow control */
1559 if (tty && C_CRTSCTS(tty)) {
1560 if (msr & EDGEPORT_MSR_CTS) {
1561 tty->hw_stopped = 0;
1562 tty_wakeup(tty);
1563 } else {
1564 tty->hw_stopped = 1;
1565 }
1566 }
1567
1568 return;
1569}
1570
2742fd88
AC		 1571static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1572 __u8 lsr, __u8 data)
1da177e4
LT		 1573{
1574 struct async_icount *icount;
2742fd88
AC		 1575 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1576 LSR_FRM_ERR | LSR_BREAK));
1da177e4 1577
2742fd88 1578 dbg("%s - %02x", __func__, new_lsr);
1da177e4
LT		 1579
1580 edge_port->shadow_lsr = lsr;
1581
2742fd88 1582 if (new_lsr & LSR_BREAK)
1da177e4
LT		 1583 /*
1584 * Parity and Framing errors only count if they
1585 * occur exclusive of a break being received.
1586 */
1587 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1da177e4
LT		 1588
1589 /* Place LSR data byte into Rx buffer */
1590 if (lsr_data && edge_port->port->tty)
2742fd88
AC		 1591 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty,
1592 &data, 1);
1da177e4
LT		 1593
1594 /* update input line counters */
1595 icount = &edge_port->icount;
1596 if (new_lsr & LSR_BREAK)
1597 icount->brk++;
1598 if (new_lsr & LSR_OVER_ERR)
1599 icount->overrun++;
1600 if (new_lsr & LSR_PAR_ERR)
1601 icount->parity++;
1602 if (new_lsr & LSR_FRM_ERR)
1603 icount->frame++;
1604}
1605
1606
2742fd88 1607static void edge_interrupt_callback(struct urb *urb)
1da177e4 1608{
cdc97792 1609 struct edgeport_serial *edge_serial = urb->context;
1da177e4
LT		 1610 struct usb_serial_port *port;
1611 struct edgeport_port *edge_port;
1612 unsigned char *data = urb->transfer_buffer;
1613 int length = urb->actual_length;
1614 int port_number;
1615 int function;
ee337c21 1616 int retval;
1da177e4
LT		 1617 __u8 lsr;
1618 __u8 msr;
ee337c21 1619 int status = urb->status;
1da177e4 1620
441b62c1 1621 dbg("%s", __func__);
1da177e4 1622
ee337c21 1623 switch (status) {
1da177e4
LT		 1624 case 0:
1625 /* success */
1626 break;
1627 case -ECONNRESET:
1628 case -ENOENT:
1629 case -ESHUTDOWN:
1630 /* this urb is terminated, clean up */
ee337c21 1631 dbg("%s - urb shutting down with status: %d",
441b62c1 1632 __func__, status);
1da177e4
LT		 1633 return;
1634 default:
ee337c21 1635 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
441b62c1 1636 "%d\n", __func__, status);
1da177e4
LT		 1637 goto exit;
1638 }
1639
1640 if (!length) {
2742fd88 1641 dbg("%s - no data in urb", __func__);
1da177e4
LT		 1642 goto exit;
1643 }
2742fd88
AC		 1644
1645 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1646 __func__, length, data);
1647
1da177e4 1648 if (length != 2) {
2742fd88
AC		 1649 dbg("%s - expecting packet of size 2, got %d",
1650 __func__, length);
1da177e4
LT		 1651 goto exit;
1652 }
1653
2742fd88
AC		 1654 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1655 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1656 dbg("%s - port_number %d, function %d, info 0x%x",
441b62c1 1657 __func__, port_number, function, data[1]);
1da177e4
LT		 1658 port = edge_serial->serial->port[port_number];
1659 edge_port = usb_get_serial_port_data(port);
1660 if (!edge_port) {
2742fd88 1661 dbg("%s - edge_port not found", __func__);
1da177e4
LT		 1662 return;
1663 }
1664 switch (function) {
1665 case TIUMP_INTERRUPT_CODE_LSR:
2742fd88 1666 lsr = map_line_status(data[1]);
1da177e4 1667 if (lsr & UMP_UART_LSR_DATA_MASK) {
2742fd88
AC		 1668 /* Save the LSR event for bulk read
1669 completion routine */
1670 dbg("%s - LSR Event Port %u LSR Status = %02x",
441b62c1 1671 __func__, port_number, lsr);
1da177e4
LT		 1672 edge_port->lsr_event = 1;
1673 edge_port->lsr_mask = lsr;
1674 } else {
2742fd88 1675 dbg("%s - ===== Port %d LSR Status = %02x ======",
441b62c1 1676 __func__, port_number, lsr);
2742fd88 1677 handle_new_lsr(edge_port, 0, lsr, 0);
1da177e4
LT		 1678 }
1679 break;
1680
2742fd88 1681 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1da177e4
LT		 1682 /* Copy MSR from UMP */
1683 msr = data[1];
2742fd88 1684 dbg("%s - ===== Port %u MSR Status = %02x ======\n",
441b62c1 1685 __func__, port_number, msr);
2742fd88 1686 handle_new_msr(edge_port, msr);
1da177e4
LT		 1687 break;
1688
1689 default:
2742fd88
AC		 1690 dev_err(&urb->dev->dev,
1691 "%s - Unknown Interrupt code from UMP %x\n",
1692 __func__, data[1]);
1da177e4 1693 break;
2742fd88 1694
1da177e4
LT		 1695 }
1696
1697exit:
2742fd88 1698 retval = usb_submit_urb(urb, GFP_ATOMIC);
ee337c21 1699 if (retval)
2742fd88
AC		 1700 dev_err(&urb->dev->dev,
1701 "%s - usb_submit_urb failed with result %d\n",
441b62c1 1702 __func__, retval);
1da177e4
LT		 1703}
1704
2742fd88 1705static void edge_bulk_in_callback(struct urb *urb)
1da177e4 1706{
cdc97792 1707 struct edgeport_port *edge_port = urb->context;
1da177e4
LT		 1708 unsigned char *data = urb->transfer_buffer;
1709 struct tty_struct *tty;
ee337c21 1710 int retval = 0;
1da177e4 1711 int port_number;
ee337c21 1712 int status = urb->status;
1da177e4 1713
441b62c1 1714 dbg("%s", __func__);
1da177e4 1715
ee337c21 1716 switch (status) {
1da177e4
LT		 1717 case 0:
1718 /* success */
1719 break;
1720 case -ECONNRESET:
1721 case -ENOENT:
1722 case -ESHUTDOWN:
1723 /* this urb is terminated, clean up */
ee337c21 1724 dbg("%s - urb shutting down with status: %d",
441b62c1 1725 __func__, status);
1da177e4
LT		 1726 return;
1727 default:
2742fd88
AC		 1728 dev_err(&urb->dev->dev,
1729 "%s - nonzero read bulk status received: %d\n",
1730 __func__, status);
1da177e4
LT		 1731 }
1732
ee337c21 1733 if (status == -EPIPE)
1da177e4
LT		 1734 goto exit;
1735
ee337c21 1736 if (status) {
2742fd88 1737 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1da177e4
LT		 1738 return;
1739 }
1740
1741 port_number = edge_port->port->number - edge_port->port->serial->minor;
1742
1743 if (edge_port->lsr_event) {
1744 edge_port->lsr_event = 0;
2742fd88 1745 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
441b62c1 1746 __func__, port_number, edge_port->lsr_mask, *data);
2742fd88 1747 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1da177e4
LT		 1748 /* Adjust buffer length/pointer */
1749 --urb->actual_length;
1750 ++data;
1751 }
1752
1753 tty = edge_port->port->tty;
1754 if (tty && urb->actual_length) {
2742fd88
AC		 1755 usb_serial_debug_data(debug, &edge_port->port->dev,
1756 __func__, urb->actual_length, data);
1757 if (edge_port->close_pending)
1758 dbg("%s - close pending, dropping data on the floor",
1759 __func__);
1760 else
1761 edge_tty_recv(&edge_port->port->dev, tty, data,
1762 urb->actual_length);
1da177e4
LT		 1763 edge_port->icount.rx += urb->actual_length;
1764 }
1765
1766exit:
1767 /* continue read unless stopped */
1768 spin_lock(&edge_port->ep_lock);
1769 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1770 urb->dev = edge_port->port->serial->dev;
ee337c21 1771 retval = usb_submit_urb(urb, GFP_ATOMIC);
1da177e4
LT		 1772 } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1773 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1774 }
1775 spin_unlock(&edge_port->ep_lock);
ee337c21 1776 if (retval)
2742fd88
AC		 1777 dev_err(&urb->dev->dev,
1778 "%s - usb_submit_urb failed with result %d\n",
441b62c1 1779 __func__, retval);
1da177e4
LT		 1780}
1781
2742fd88
AC		 1782static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1783 unsigned char *data, int length)
1da177e4 1784{
2742fd88 1785 int queued;
1da177e4 1786
2742fd88
AC		 1787 tty_buffer_request_room(tty, length);
1788 queued = tty_insert_flip_string(tty, data, length);
1789 if (queued < length)
1790 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1791 __func__, length - queued);
1da177e4
LT		 1792 tty_flip_buffer_push(tty);
1793}
1794
2742fd88 1795static void edge_bulk_out_callback(struct urb *urb)
1da177e4 1796{
cdc97792 1797 struct usb_serial_port *port = urb->context;
1da177e4 1798 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
ee337c21 1799 int status = urb->status;
1da177e4 1800
2742fd88 1801 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 1802
1803 edge_port->ep_write_urb_in_use = 0;
1804
ee337c21 1805 switch (status) {
1da177e4
LT		 1806 case 0:
1807 /* success */
1808 break;
1809 case -ECONNRESET:
1810 case -ENOENT:
1811 case -ESHUTDOWN:
1812 /* this urb is terminated, clean up */
ee337c21 1813 dbg("%s - urb shutting down with status: %d",
441b62c1 1814 __func__, status);
1da177e4
LT		 1815 return;
1816 default:
ee337c21 1817 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
441b62c1 1818 "received: %d\n", __func__, status);
1da177e4
LT		 1819 }
1820
1821 /* send any buffered data */
1822 edge_send(port);
1823}
1824
2742fd88 1825static int edge_open(struct usb_serial_port *port, struct file *filp)
1da177e4
LT		 1826{
1827 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1828 struct edgeport_serial *edge_serial;
1829 struct usb_device *dev;
1830 struct urb *urb;
1831 int port_number;
1832 int status;
1833 u16 open_settings;
1834 u8 transaction_timeout;
1835
441b62c1 1836 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 1837
1838 if (edge_port == NULL)
1839 return -ENODEV;
1840
b56394bf 1841 port->tty->low_latency = low_latency;
1da177e4
LT		 1842
1843 port_number = port->number - port->serial->minor;
1844 switch (port_number) {
2742fd88
AC		 1845 case 0:
1846 edge_port->uart_base = UMPMEM_BASE_UART1;
1847 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1848 break;
1849 case 1:
1850 edge_port->uart_base = UMPMEM_BASE_UART2;
1851 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1852 break;
1853 default:
1854 dev_err(&port->dev, "Unknown port number!!!\n");
1855 return -ENODEV;
1da177e4
LT		 1856 }
1857
2742fd88
AC		 1858 dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1859 __func__, port_number, edge_port->uart_base,
1860 edge_port->dma_address);
1da177e4
LT		 1861
1862 dev = port->serial->dev;
1863
2742fd88
AC		 1864 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1865 init_waitqueue_head(&edge_port->delta_msr_wait);
1da177e4
LT		 1866
1867 /* turn off loopback */
2742fd88 1868 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1da177e4 1869 if (status) {
2742fd88
AC		 1870 dev_err(&port->dev,
1871 "%s - cannot send clear loopback command, %d\n",
441b62c1 1872 __func__, status);
1da177e4
LT		 1873 return status;
1874 }
2742fd88 1875
1da177e4 1876 /* set up the port settings */
2742fd88 1877 edge_set_termios(port, port->tty->termios);
1da177e4
LT		 1878
1879 /* open up the port */
1880
1881 /* milliseconds to timeout for DMA transfer */
1882 transaction_timeout = 2;
1883
2742fd88
AC		 1884 edge_port->ump_read_timeout =
1885 max(20, ((transaction_timeout * 3) / 2));
1da177e4 1886
2742fd88
AC		 1887 /* milliseconds to timeout for DMA transfer */
1888 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1889 UMP_PIPE_TRANS_TIMEOUT_ENA |
1da177e4
LT		 1890 (transaction_timeout << 2));
1891
2742fd88 1892 dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1da177e4
LT		 1893
1894 /* Tell TI to open and start the port */
2742fd88
AC		 1895 status = send_cmd(dev, UMPC_OPEN_PORT,
1896 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1da177e4 1897 if (status) {
2742fd88
AC		 1898 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1899 __func__, status);
1da177e4
LT		 1900 return status;
1901 }
1902
1903 /* Start the DMA? */
2742fd88
AC		 1904 status = send_cmd(dev, UMPC_START_PORT,
1905 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1da177e4 1906 if (status) {
2742fd88
AC		 1907 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1908 __func__, status);
1da177e4
LT		 1909 return status;
1910 }
1911
1912 /* Clear TX and RX buffers in UMP */
2742fd88 1913 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1da177e4 1914 if (status) {
2742fd88
AC		 1915 dev_err(&port->dev,
1916 "%s - cannot send clear buffers command, %d\n",
1917 __func__, status);
1da177e4
LT		 1918 return status;
1919 }
1920
1921 /* Read Initial MSR */
2742fd88
AC		 1922 status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1923 (__u16)(UMPM_UART1_PORT + port_number),
1924 &edge_port->shadow_msr, 1);
1da177e4 1925 if (status) {
2742fd88
AC		 1926 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1927 __func__, status);
1da177e4
LT		 1928 return status;
1929 }
1930
2742fd88
AC		 1931 dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1932
1da177e4
LT		 1933 /* Set Initial MCR */
1934 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
2742fd88 1935 dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1da177e4
LT		 1936
1937 edge_serial = edge_port->edge_serial;
241ca64f 1938 if (mutex_lock_interruptible(&edge_serial->es_lock))
1da177e4
LT		 1939 return -ERESTARTSYS;
1940 if (edge_serial->num_ports_open == 0) {
2742fd88 1941 /* we are the first port to open, post the interrupt urb */
1da177e4
LT		 1942 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1943 if (!urb) {
2742fd88
AC		 1944 dev_err(&port->dev,
1945 "%s - no interrupt urb present, exiting\n",
1946 __func__);
1da177e4 1947 status = -EINVAL;
241ca64f 1948 goto release_es_lock;
1da177e4
LT		 1949 }
1950 urb->complete = edge_interrupt_callback;
1951 urb->context = edge_serial;
1952 urb->dev = dev;
2742fd88 1953 status = usb_submit_urb(urb, GFP_KERNEL);
1da177e4 1954 if (status) {
2742fd88
AC		 1955 dev_err(&port->dev,
1956 "%s - usb_submit_urb failed with value %d\n",
1957 __func__, status);
241ca64f 1958 goto release_es_lock;
1da177e4
LT		 1959 }
1960 }
1961
1962 /*
1963 * reset the data toggle on the bulk endpoints to work around bug in
1964 * host controllers where things get out of sync some times
1965 */
2742fd88
AC		 1966 usb_clear_halt(dev, port->write_urb->pipe);
1967 usb_clear_halt(dev, port->read_urb->pipe);
1da177e4
LT		 1968
1969 /* start up our bulk read urb */
1970 urb = port->read_urb;
1971 if (!urb) {
2742fd88
AC		 1972 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1973 __func__);
1da177e4
LT		 1974 status = -EINVAL;
1975 goto unlink_int_urb;
1976 }
1977 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1978 urb->complete = edge_bulk_in_callback;
1979 urb->context = edge_port;
1980 urb->dev = dev;
2742fd88 1981 status = usb_submit_urb(urb, GFP_KERNEL);
1da177e4 1982 if (status) {
2742fd88
AC		 1983 dev_err(&port->dev,
1984 "%s - read bulk usb_submit_urb failed with value %d\n",
1985 __func__, status);
1da177e4
LT		 1986 goto unlink_int_urb;
1987 }
1988
1989 ++edge_serial->num_ports_open;
1990
441b62c1 1991 dbg("%s - exited", __func__);
1da177e4 1992
241ca64f 1993 goto release_es_lock;
1da177e4
LT		 1994
1995unlink_int_urb:
1996 if (edge_port->edge_serial->num_ports_open == 0)
1997 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
241ca64f
MK		 1998release_es_lock:
1999 mutex_unlock(&edge_serial->es_lock);
1da177e4
LT		 2000 return status;
2001}
2002
2742fd88 2003static void edge_close(struct usb_serial_port *port, struct file *filp)
1da177e4
LT		 2004{
2005 struct edgeport_serial *edge_serial;
2006 struct edgeport_port *edge_port;
2007 int port_number;
2008 int status;
2009
441b62c1 2010 dbg("%s - port %d", __func__, port->number);
2742fd88 2011
1da177e4
LT		 2012 edge_serial = usb_get_serial_data(port->serial);
2013 edge_port = usb_get_serial_port_data(port);
2742fd88 2014 if (edge_serial == NULL || edge_port == NULL)
1da177e4 2015 return;
2742fd88
AC		 2016
2017 /* The bulkreadcompletion routine will check
1da177e4
LT		 2018 * this flag and dump add read data */
2019 edge_port->close_pending = 1;
2020
2021 /* chase the port close and flush */
2742fd88 2022 chase_port(edge_port, (HZ * closing_wait) / 100, 1);
1da177e4
LT		 2023
2024 usb_kill_urb(port->read_urb);
2025 usb_kill_urb(port->write_urb);
2026 edge_port->ep_write_urb_in_use = 0;
2027
2028 /* assuming we can still talk to the device,
2029 * send a close port command to it */
441b62c1 2030 dbg("%s - send umpc_close_port", __func__);
1da177e4 2031 port_number = port->number - port->serial->minor;
2742fd88 2032 status = send_cmd(port->serial->dev,
1da177e4
LT		 2033 UMPC_CLOSE_PORT,
2034 (__u8)(UMPM_UART1_PORT + port_number),
2035 0,
2036 NULL,
2037 0);
241ca64f 2038 mutex_lock(&edge_serial->es_lock);
1da177e4
LT		 2039 --edge_port->edge_serial->num_ports_open;
2040 if (edge_port->edge_serial->num_ports_open <= 0) {
2041 /* last port is now closed, let's shut down our interrupt urb */
2042 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2043 edge_port->edge_serial->num_ports_open = 0;
2044 }
241ca64f 2045 mutex_unlock(&edge_serial->es_lock);
1da177e4
LT		 2046 edge_port->close_pending = 0;
2047
441b62c1 2048 dbg("%s - exited", __func__);
1da177e4
LT		 2049}
2050
2742fd88
AC		 2051static int edge_write(struct usb_serial_port *port, const unsigned char *data,
2052 int count)
1da177e4
LT		 2053{
2054 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2055 unsigned long flags;
2056
441b62c1 2057 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2058
2059 if (count == 0) {
441b62c1 2060 dbg("%s - write request of 0 bytes", __func__);
1da177e4
LT		 2061 return 0;
2062 }
2063
2064 if (edge_port == NULL)
2065 return -ENODEV;
2066 if (edge_port->close_pending == 1)
2067 return -ENODEV;
2068
2069 spin_lock_irqsave(&edge_port->ep_lock, flags);
2070 count = edge_buf_put(edge_port->ep_out_buf, data, count);
2071 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2072
2073 edge_send(port);
2074
2075 return count;
2076}
2077
2078static void edge_send(struct usb_serial_port *port)
2079{
2080 int count, result;
2081 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2082 struct tty_struct *tty = port->tty;
2083 unsigned long flags;
2084
2085
441b62c1 2086 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2087
2088 spin_lock_irqsave(&edge_port->ep_lock, flags);
2089
2090 if (edge_port->ep_write_urb_in_use) {
2091 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2092 return;
2093 }
2094
2095 count = edge_buf_get(edge_port->ep_out_buf,
2096 port->write_urb->transfer_buffer,
2097 port->bulk_out_size);
2098
2099 if (count == 0) {
2100 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2101 return;
2102 }
2103
2104 edge_port->ep_write_urb_in_use = 1;
2105
2106 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2107
2742fd88
AC		 2108 usb_serial_debug_data(debug, &port->dev, __func__, count,
2109 port->write_urb->transfer_buffer);
1da177e4
LT		 2110
2111 /* set up our urb */
2742fd88
AC		 2112 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
2113 usb_sndbulkpipe(port->serial->dev,
1da177e4
LT		 2114 port->bulk_out_endpointAddress),
2115 port->write_urb->transfer_buffer, count,
2116 edge_bulk_out_callback,
2117 port);
2118
2119 /* send the data out the bulk port */
2120 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2121 if (result) {
2742fd88
AC		 2122 dev_err(&port->dev,
2123 "%s - failed submitting write urb, error %d\n",
2124 __func__, result);
1da177e4 2125 edge_port->ep_write_urb_in_use = 0;
2742fd88
AC		 2126 /* TODO: reschedule edge_send */
2127 } else
1da177e4 2128 edge_port->icount.tx += count;
1da177e4
LT		 2129
2130 /* wakeup any process waiting for writes to complete */
2131 /* there is now more room in the buffer for new writes */
2742fd88 2132 if (tty)
1da177e4 2133 tty_wakeup(tty);
1da177e4
LT		 2134}
2135
2742fd88 2136static int edge_write_room(struct usb_serial_port *port)
1da177e4
LT		 2137{
2138 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2139 int room = 0;
2140 unsigned long flags;
2141
441b62c1 2142 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2143
2144 if (edge_port == NULL)
2742fd88 2145 return 0;
1da177e4 2146 if (edge_port->close_pending == 1)
2742fd88 2147 return 0;
1da177e4
LT		 2148
2149 spin_lock_irqsave(&edge_port->ep_lock, flags);
2150 room = edge_buf_space_avail(edge_port->ep_out_buf);
2151 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2152
441b62c1 2153 dbg("%s - returns %d", __func__, room);
1da177e4
LT		 2154 return room;
2155}
2156
2742fd88 2157static int edge_chars_in_buffer(struct usb_serial_port *port)
1da177e4
LT		 2158{
2159 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2160 int chars = 0;
2161 unsigned long flags;
2162
441b62c1 2163 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2164
2165 if (edge_port == NULL)
2742fd88 2166 return 0;
1da177e4 2167 if (edge_port->close_pending == 1)
2742fd88 2168 return 0;
1da177e4
LT		 2169
2170 spin_lock_irqsave(&edge_port->ep_lock, flags);
2171 chars = edge_buf_data_avail(edge_port->ep_out_buf);
2172 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2173
2742fd88 2174 dbg("%s - returns %d", __func__, chars);
1da177e4
LT		 2175 return chars;
2176}
2177
2742fd88 2178static void edge_throttle(struct usb_serial_port *port)
1da177e4
LT		 2179{
2180 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2742fd88 2181 struct tty_struct *tty = port->tty;
1da177e4
LT		 2182 int status;
2183
441b62c1 2184 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2185
2186 if (edge_port == NULL)
2187 return;
2188
1da177e4
LT		 2189 /* if we are implementing XON/XOFF, send the stop character */
2190 if (I_IXOFF(tty)) {
2191 unsigned char stop_char = STOP_CHAR(tty);
2742fd88
AC		 2192 status = edge_write(port, &stop_char, 1);
2193 if (status <= 0)
2194 dev_err(&port->dev,
2195 "%s - failed to write stop character, %d\n",
2196 __func__, status);
1da177e4
LT		 2197 }
2198
2199 /* if we are implementing RTS/CTS, stop reads */
2200 /* and the Edgeport will clear the RTS line */
2201 if (C_CRTSCTS(tty))
2202 stop_read(edge_port);
2203
2204}
2205
2742fd88 2206static void edge_unthrottle(struct usb_serial_port *port)
1da177e4
LT		 2207{
2208 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2742fd88 2209 struct tty_struct *tty = port->tty;
1da177e4
LT		 2210 int status;
2211
441b62c1 2212 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2213
2214 if (edge_port == NULL)
2215 return;
2216
1da177e4
LT		 2217 /* if we are implementing XON/XOFF, send the start character */
2218 if (I_IXOFF(tty)) {
2219 unsigned char start_char = START_CHAR(tty);
2742fd88
AC		 2220 status = edge_write(port, &start_char, 1);
2221 if (status <= 0)
2222 dev_err(&port->dev,
2223 "%s - failed to write start character, %d\n",
2224 __func__, status);
1da177e4 2225 }
1da177e4
LT		 2226 /* if we are implementing RTS/CTS, restart reads */
2227 /* are the Edgeport will assert the RTS line */
2228 if (C_CRTSCTS(tty)) {
2229 status = restart_read(edge_port);
2230 if (status)
2742fd88
AC		 2231 dev_err(&port->dev,
2232 "%s - read bulk usb_submit_urb failed: %d\n",
2233 __func__, status);
1da177e4
LT		 2234 }
2235
2236}
2237
2238static void stop_read(struct edgeport_port *edge_port)
2239{
2240 unsigned long flags;
2241
2242 spin_lock_irqsave(&edge_port->ep_lock, flags);
2243
2244 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2245 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2246 edge_port->shadow_mcr &= ~MCR_RTS;
2247
2248 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2249}
2250
2251static int restart_read(struct edgeport_port *edge_port)
2252{
2253 struct urb *urb;
2254 int status = 0;
2255 unsigned long flags;
2256
2257 spin_lock_irqsave(&edge_port->ep_lock, flags);
2258
2259 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2260 urb = edge_port->port->read_urb;
2261 urb->complete = edge_bulk_in_callback;
2262 urb->context = edge_port;
2263 urb->dev = edge_port->port->serial->dev;
efdff608 2264 status = usb_submit_urb(urb, GFP_ATOMIC);
1da177e4
LT		 2265 }
2266 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2267 edge_port->shadow_mcr |= MCR_RTS;
2268
2269 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2270
2271 return status;
2272}
2273
2742fd88
AC		 2274static void change_port_settings(struct edgeport_port *edge_port,
2275 struct ktermios *old_termios)
1da177e4
LT		 2276{
2277 struct ump_uart_config *config;
2278 struct tty_struct *tty;
2279 int baud;
2280 unsigned cflag;
2281 int status;
2742fd88
AC		 2282 int port_number = edge_port->port->number -
2283 edge_port->port->serial->minor;
1da177e4 2284
441b62c1 2285 dbg("%s - port %d", __func__, edge_port->port->number);
1da177e4
LT		 2286
2287 tty = edge_port->port->tty;
1da177e4 2288
2742fd88 2289 config = kmalloc(sizeof(*config), GFP_KERNEL);
1da177e4 2290 if (!config) {
2742fd88
AC		 2291 *tty->termios = *old_termios;
2292 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2293 __func__);
1da177e4
LT		 2294 return;
2295 }
2296
2297 cflag = tty->termios->c_cflag;
2298
2299 config->wFlags = 0;
2300
2301 /* These flags must be set */
2302 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2303 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2304 config->bUartMode = (__u8)(edge_port->bUartMode);
2305
2306 switch (cflag & CSIZE) {
2742fd88
AC		 2307 case CS5:
2308 config->bDataBits = UMP_UART_CHAR5BITS;
2309 dbg("%s - data bits = 5", __func__);
2310 break;
2311 case CS6:
2312 config->bDataBits = UMP_UART_CHAR6BITS;
2313 dbg("%s - data bits = 6", __func__);
2314 break;
2315 case CS7:
2316 config->bDataBits = UMP_UART_CHAR7BITS;
2317 dbg("%s - data bits = 7", __func__);
2318 break;
2319 default:
2320 case CS8:
2321 config->bDataBits = UMP_UART_CHAR8BITS;
2322 dbg("%s - data bits = 8", __func__);
1da177e4
LT		 2323 break;
2324 }
2325
2326 if (cflag & PARENB) {
2327 if (cflag & PARODD) {
2328 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2329 config->bParity = UMP_UART_ODDPARITY;
441b62c1 2330 dbg("%s - parity = odd", __func__);
1da177e4
LT		 2331 } else {
2332 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2333 config->bParity = UMP_UART_EVENPARITY;
441b62c1 2334 dbg("%s - parity = even", __func__);
1da177e4
LT		 2335 }
2336 } else {
2742fd88 2337 config->bParity = UMP_UART_NOPARITY;
441b62c1 2338 dbg("%s - parity = none", __func__);
1da177e4
LT		 2339 }
2340
2341 if (cflag & CSTOPB) {
2342 config->bStopBits = UMP_UART_STOPBIT2;
441b62c1 2343 dbg("%s - stop bits = 2", __func__);
1da177e4
LT		 2344 } else {
2345 config->bStopBits = UMP_UART_STOPBIT1;
441b62c1 2346 dbg("%s - stop bits = 1", __func__);
1da177e4
LT		 2347 }
2348
2349 /* figure out the flow control settings */
2350 if (cflag & CRTSCTS) {
2351 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2352 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
441b62c1 2353 dbg("%s - RTS/CTS is enabled", __func__);
1da177e4 2354 } else {
441b62c1 2355 dbg("%s - RTS/CTS is disabled", __func__);
1da177e4
LT		 2356 tty->hw_stopped = 0;
2357 restart_read(edge_port);
2358 }
2359
2742fd88
AC		 2360 /* if we are implementing XON/XOFF, set the start and stop
2361 character in the device */
2362 config->cXon = START_CHAR(tty);
2363 config->cXoff = STOP_CHAR(tty);
1da177e4 2364
2742fd88
AC		 2365 /* if we are implementing INBOUND XON/XOFF */
2366 if (I_IXOFF(tty)) {
2367 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2368 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2369 __func__, config->cXon, config->cXoff);
2370 } else
2371 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
1da177e4 2372
2742fd88
AC		 2373 /* if we are implementing OUTBOUND XON/XOFF */
2374 if (I_IXON(tty)) {
2375 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2376 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2377 __func__, config->cXon, config->cXoff);
2378 } else
2379 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
1da177e4 2380
d5f5bcd4
AC		 2381 tty->termios->c_cflag &= ~CMSPAR;
2382
1da177e4
LT		 2383 /* Round the baud rate */
2384 baud = tty_get_baud_rate(tty);
2385 if (!baud) {
2386 /* pick a default, any default... */
2387 baud = 9600;
d5f5bcd4
AC		 2388 } else
2389 tty_encode_baud_rate(tty, baud, baud);
2390
1da177e4
LT		 2391 edge_port->baud_rate = baud;
2392 config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2393
d5f5bcd4
AC		 2394 /* FIXME: Recompute actual baud from divisor here */
2395
2742fd88
AC		 2396 dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2397 config->wBaudRate);
1da177e4 2398
2742fd88
AC		 2399 dbg("wBaudRate: %d", (int)(461550L / config->wBaudRate));
2400 dbg("wFlags: 0x%x", config->wFlags);
2401 dbg("bDataBits: %d", config->bDataBits);
2402 dbg("bParity: %d", config->bParity);
2403 dbg("bStopBits: %d", config->bStopBits);
2404 dbg("cXon: %d", config->cXon);
2405 dbg("cXoff: %d", config->cXoff);
2406 dbg("bUartMode: %d", config->bUartMode);
1da177e4
LT		 2407
2408 /* move the word values into big endian mode */
2742fd88
AC		 2409 cpu_to_be16s(&config->wFlags);
2410 cpu_to_be16s(&config->wBaudRate);
1da177e4 2411
2742fd88 2412 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
1da177e4 2413 (__u8)(UMPM_UART1_PORT + port_number),
2742fd88
AC		 2414 0, (__u8 *)config, sizeof(*config));
2415 if (status)
2416 dbg("%s - error %d when trying to write config to device",
441b62c1 2417 __func__, status);
2742fd88 2418 kfree(config);
1da177e4
LT		 2419 return;
2420}
2421
2742fd88
AC		 2422static void edge_set_termios(struct usb_serial_port *port,
2423 struct ktermios *old_termios)
1da177e4
LT		 2424{
2425 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2426 struct tty_struct *tty = port->tty;
1da177e4 2427
441b62c1 2428 dbg("%s - clfag %08x iflag %08x", __func__,
1da177e4 2429 tty->termios->c_cflag, tty->termios->c_iflag);
441b62c1 2430 dbg("%s - old clfag %08x old iflag %08x", __func__,
d5f5bcd4 2431 old_termios->c_cflag, old_termios->c_iflag);
441b62c1 2432 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 2433
2434 if (edge_port == NULL)
2435 return;
1da177e4 2436 /* change the port settings to the new ones specified */
2742fd88 2437 change_port_settings(edge_port, old_termios);
1da177e4
LT		 2438}
2439
2742fd88
AC		 2440static int edge_tiocmset(struct usb_serial_port *port, struct file *file,
2441 unsigned int set, unsigned int clear)
1da177e4
LT		 2442{
2443 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2444 unsigned int mcr;
3d71fe0b 2445 unsigned long flags;
1da177e4 2446
441b62c1 2447 dbg("%s - port %d", __func__, port->number);
1da177e4 2448
3d71fe0b 2449 spin_lock_irqsave(&edge_port->ep_lock, flags);
1da177e4
LT		 2450 mcr = edge_port->shadow_mcr;
2451 if (set & TIOCM_RTS)
2452 mcr |= MCR_RTS;
2453 if (set & TIOCM_DTR)
2454 mcr |= MCR_DTR;
2455 if (set & TIOCM_LOOP)
2456 mcr |= MCR_LOOPBACK;
2457
2458 if (clear & TIOCM_RTS)
2459 mcr &= ~MCR_RTS;
2460 if (clear & TIOCM_DTR)
2461 mcr &= ~MCR_DTR;
2462 if (clear & TIOCM_LOOP)
2463 mcr &= ~MCR_LOOPBACK;
2464
2465 edge_port->shadow_mcr = mcr;
3d71fe0b 2466 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1da177e4 2467
2742fd88 2468 restore_mcr(edge_port, mcr);
1da177e4
LT		 2469 return 0;
2470}
2471
2472static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
2473{
2474 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2475 unsigned int result = 0;
2476 unsigned int msr;
2477 unsigned int mcr;
3d71fe0b 2478 unsigned long flags;
1da177e4 2479
441b62c1 2480 dbg("%s - port %d", __func__, port->number);
1da177e4 2481
3d71fe0b
AC		 2482 spin_lock_irqsave(&edge_port->ep_lock, flags);
2483
1da177e4
LT		 2484 msr = edge_port->shadow_msr;
2485 mcr = edge_port->shadow_mcr;
2486 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2487 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2488 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2489 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2490 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2491 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2492
2493
441b62c1 2494 dbg("%s -- %x", __func__, result);
3d71fe0b 2495 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1da177e4
LT		 2496
2497 return result;
2498}
2499
2742fd88
AC		 2500static int get_serial_info(struct edgeport_port *edge_port,
2501 struct serial_struct __user *retinfo)
1da177e4
LT		 2502{
2503 struct serial_struct tmp;
2504
2505 if (!retinfo)
2506 return -EFAULT;
2507
2508 memset(&tmp, 0, sizeof(tmp));
2509
2510 tmp.type = PORT_16550A;
2511 tmp.line = edge_port->port->serial->minor;
2512 tmp.port = edge_port->port->number;
2513 tmp.irq = 0;
2514 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2515 tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
2516 tmp.baud_base = 9600;
2517 tmp.close_delay = 5*HZ;
2518 tmp.closing_wait = closing_wait;
1da177e4
LT		 2519
2520 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2521 return -EFAULT;
2522 return 0;
2523}
2524
2742fd88
AC		 2525static int edge_ioctl(struct usb_serial_port *port, struct file *file,
2526 unsigned int cmd, unsigned long arg)
1da177e4
LT		 2527{
2528 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2529 struct async_icount cnow;
2530 struct async_icount cprev;
2531
441b62c1 2532 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1da177e4
LT		 2533
2534 switch (cmd) {
2742fd88
AC		 2535 case TIOCGSERIAL:
2536 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2537 return get_serial_info(edge_port,
2538 (struct serial_struct __user *) arg);
2539 case TIOCMIWAIT:
2540 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2541 cprev = edge_port->icount;
2542 while (1) {
2543 interruptible_sleep_on(&edge_port->delta_msr_wait);
2544 /* see if a signal did it */
2545 if (signal_pending(current))
2546 return -ERESTARTSYS;
2547 cnow = edge_port->icount;
2548 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2549 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2550 return -EIO; /* no change => error */
2551 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2552 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2553 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2554 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2555 return 0;
1da177e4 2556 }
2742fd88
AC		 2557 cprev = cnow;
2558 }
2559 /* not reached */
2560 break;
2561 case TIOCGICOUNT:
2562 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2563 port->number, edge_port->icount.rx, edge_port->icount.tx);
2564 if (copy_to_user((void __user *)arg, &edge_port->icount,
2565 sizeof(edge_port->icount)))
2566 return -EFAULT;
2567 return 0;
1da177e4 2568 }
1da177e4
LT		 2569 return -ENOIOCTLCMD;
2570}
2571
2742fd88 2572static void edge_break(struct usb_serial_port *port, int on)
1da177e4
LT		 2573{
2574 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2575 int status;
2742fd88 2576 int bv = 0; /* Off */
1da177e4 2577
2742fd88 2578 dbg("%s - state = %d", __func__, on);
1da177e4
LT		 2579
2580 /* chase the port close */
2742fd88 2581 chase_port(edge_port, 0, 0);
1da177e4 2582
2742fd88
AC		 2583 if (on == -1)
2584 bv = 1; /* On */
2585 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2586 if (status)
2587 dbg("%s - error %d sending break set/clear command.",
441b62c1 2588 __func__, status);
1da177e4
LT		 2589}
2590
2742fd88 2591static int edge_startup(struct usb_serial *serial)
1da177e4
LT		 2592{
2593 struct edgeport_serial *edge_serial;
2594 struct edgeport_port *edge_port;
2595 struct usb_device *dev;
2596 int status;
2597 int i;
2598
2599 dev = serial->dev;
2600
2601 /* create our private serial structure */
80b6ca48 2602 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
1da177e4 2603 if (edge_serial == NULL) {
441b62c1 2604 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
1da177e4
LT		 2605 return -ENOMEM;
2606 }
241ca64f 2607 mutex_init(&edge_serial->es_lock);
1da177e4
LT		 2608 edge_serial->serial = serial;
2609 usb_set_serial_data(serial, edge_serial);
2610
2742fd88 2611 status = download_fw(edge_serial);
1da177e4 2612 if (status) {
2742fd88 2613 kfree(edge_serial);
1da177e4
LT		 2614 return status;
2615 }
2616
2617 /* set up our port private structures */
2618 for (i = 0; i < serial->num_ports; ++i) {
80b6ca48 2619 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
1da177e4 2620 if (edge_port == NULL) {
2742fd88
AC		 2621 dev_err(&serial->dev->dev, "%s - Out of memory\n",
2622 __func__);
1da177e4
LT		 2623 goto cleanup;
2624 }
1da177e4
LT		 2625 spin_lock_init(&edge_port->ep_lock);
2626 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2627 if (edge_port->ep_out_buf == NULL) {
2742fd88
AC		 2628 dev_err(&serial->dev->dev, "%s - Out of memory\n",
2629 __func__);
1da177e4
LT		 2630 kfree(edge_port);
2631 goto cleanup;
2632 }
2633 edge_port->port = serial->port[i];
2634 edge_port->edge_serial = edge_serial;
2635 usb_set_serial_port_data(serial->port[i], edge_port);
fc4cbd75 2636 edge_port->bUartMode = default_uart_mode;
1da177e4 2637 }
2742fd88 2638
1da177e4
LT		 2639 return 0;
2640
2641cleanup:
2742fd88 2642 for (--i; i >= 0; --i) {
1da177e4
LT		 2643 edge_port = usb_get_serial_port_data(serial->port[i]);
2644 edge_buf_free(edge_port->ep_out_buf);
2645 kfree(edge_port);
2646 usb_set_serial_port_data(serial->port[i], NULL);
2647 }
2742fd88 2648 kfree(edge_serial);
1da177e4
LT		 2649 usb_set_serial_data(serial, NULL);
2650 return -ENOMEM;
2651}
2652
2742fd88 2653static void edge_shutdown(struct usb_serial *serial)
1da177e4
LT		 2654{
2655 int i;
2656 struct edgeport_port *edge_port;
2657
2742fd88 2658 dbg("%s", __func__);
1da177e4 2659
0d46c007 2660 for (i = 0; i < serial->num_ports; ++i) {
1da177e4 2661 edge_port = usb_get_serial_port_data(serial->port[i]);
fc4cbd75 2662 edge_remove_sysfs_attrs(edge_port->port);
0d46c007
JJ		 2663 edge_buf_free(edge_port->ep_out_buf);
2664 kfree(edge_port);
1da177e4
LT		 2665 usb_set_serial_port_data(serial->port[i], NULL);
2666 }
0d46c007 2667 kfree(usb_get_serial_data(serial));
1da177e4
LT		 2668 usb_set_serial_data(serial, NULL);
2669}
2670
2671
fc4cbd75
MP		 2672/* Sysfs Attributes */
2673
2674static ssize_t show_uart_mode(struct device *dev,
2675 struct device_attribute *attr, char *buf)
2676{
2677 struct usb_serial_port *port = to_usb_serial_port(dev);
2678 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2679
2680 return sprintf(buf, "%d\n", edge_port->bUartMode);
2681}
2682
2683static ssize_t store_uart_mode(struct device *dev,
2684 struct device_attribute *attr, const char *valbuf, size_t count)
2685{
2686 struct usb_serial_port *port = to_usb_serial_port(dev);
2687 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2688 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2689
441b62c1 2690 dbg("%s: setting uart_mode = %d", __func__, v);
fc4cbd75
MP		 2691
2692 if (v < 256)
2693 edge_port->bUartMode = v;
2694 else
441b62c1 2695 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
fc4cbd75
MP		 2696
2697 return count;
2698}
2699
2742fd88
AC		 2700static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2701 store_uart_mode);
fc4cbd75
MP		 2702
2703static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2704{
2705 return device_create_file(&port->dev, &dev_attr_uart_mode);
2706}
2707
2708static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2709{
2710 device_remove_file(&port->dev, &dev_attr_uart_mode);
2711 return 0;
2712}
2713
2714
1da177e4
LT		 2715/* Circular Buffer */
2716
2717/*
2718 * edge_buf_alloc
2719 *
2720 * Allocate a circular buffer and all associated memory.
2721 */
2722
2723static struct edge_buf *edge_buf_alloc(unsigned int size)
2724{
2725 struct edge_buf *eb;
2726
2727
2728 if (size == 0)
2729 return NULL;
2730
5cbded58 2731 eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
1da177e4
LT		 2732 if (eb == NULL)
2733 return NULL;
2734
2735 eb->buf_buf = kmalloc(size, GFP_KERNEL);
2736 if (eb->buf_buf == NULL) {
2737 kfree(eb);
2738 return NULL;
2739 }
2740
2741 eb->buf_size = size;
2742 eb->buf_get = eb->buf_put = eb->buf_buf;
2743
2744 return eb;
2745}
2746
2747
2748/*
2749 * edge_buf_free
2750 *
2751 * Free the buffer and all associated memory.
2752 */
2753
3d48586c 2754static void edge_buf_free(struct edge_buf *eb)
1da177e4 2755{
1bc3c9e1
JJ		 2756 if (eb) {
2757 kfree(eb->buf_buf);
1da177e4
LT		 2758 kfree(eb);
2759 }
2760}
2761
2762
2763/*
2764 * edge_buf_clear
2765 *
2766 * Clear out all data in the circular buffer.
2767 */
2768
2769static void edge_buf_clear(struct edge_buf *eb)
2770{
2742fd88
AC		 2771 if (eb != NULL)
2772 eb->buf_get = eb->buf_put;
2773 /* equivalent to a get of all data available */
1da177e4
LT		 2774}
2775
2776
2777/*
2778 * edge_buf_data_avail
2779 *
2780 * Return the number of bytes of data available in the circular
2781 * buffer.
2782 */
2783
2784static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2785{
2742fd88 2786 if (eb == NULL)
1da177e4 2787 return 0;
2742fd88 2788 return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
1da177e4
LT		 2789}
2790
2791
2792/*
2793 * edge_buf_space_avail
2794 *
2795 * Return the number of bytes of space available in the circular
2796 * buffer.
2797 */
2798
2799static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2800{
2742fd88 2801 if (eb == NULL)
1da177e4 2802 return 0;
2742fd88 2803 return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
1da177e4
LT		 2804}
2805
2806
2807/*
2808 * edge_buf_put
2809 *
2810 * Copy data data from a user buffer and put it into the circular buffer.
2811 * Restrict to the amount of space available.
2812 *
2813 * Return the number of bytes copied.
2814 */
2815
2816static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2817 unsigned int count)
2818{
2819 unsigned int len;
2820
2821
2822 if (eb == NULL)
2823 return 0;
2824
2825 len = edge_buf_space_avail(eb);
2826 if (count > len)
2827 count = len;
2828
2829 if (count == 0)
2830 return 0;
2831
2832 len = eb->buf_buf + eb->buf_size - eb->buf_put;
2833 if (count > len) {
2834 memcpy(eb->buf_put, buf, len);
2835 memcpy(eb->buf_buf, buf+len, count - len);
2836 eb->buf_put = eb->buf_buf + count - len;
2837 } else {
2838 memcpy(eb->buf_put, buf, count);
2839 if (count < len)
2840 eb->buf_put += count;
2841 else /* count == len */
2842 eb->buf_put = eb->buf_buf;
2843 }
2844
2845 return count;
2846}
2847
2848
2849/*
2850 * edge_buf_get
2851 *
2852 * Get data from the circular buffer and copy to the given buffer.
2853 * Restrict to the amount of data available.
2854 *
2855 * Return the number of bytes copied.
2856 */
2857
2858static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2859 unsigned int count)
2860{
2861 unsigned int len;
2862
2863
2864 if (eb == NULL)
2865 return 0;
2866
2867 len = edge_buf_data_avail(eb);
2868 if (count > len)
2869 count = len;
2870
2871 if (count == 0)
2872 return 0;
2873
2874 len = eb->buf_buf + eb->buf_size - eb->buf_get;
2875 if (count > len) {
2876 memcpy(buf, eb->buf_get, len);
2877 memcpy(buf+len, eb->buf_buf, count - len);
2878 eb->buf_get = eb->buf_buf + count - len;
2879 } else {
2880 memcpy(buf, eb->buf_get, count);
2881 if (count < len)
2882 eb->buf_get += count;
2883 else /* count == len */
2884 eb->buf_get = eb->buf_buf;
2885 }
2886
2887 return count;
2888}
2889
2890
ea65370d 2891static struct usb_serial_driver edgeport_1port_device = {
18fcac35 2892 .driver = {
269bda1c
GKH		 2893 .owner = THIS_MODULE,
2894 .name = "edgeport_ti_1",
18fcac35 2895 },
269bda1c 2896 .description = "Edgeport TI 1 port adapter",
d9b1b787 2897 .usb_driver = &io_driver,
1da177e4 2898 .id_table = edgeport_1port_id_table,
1da177e4
LT		 2899 .num_ports = 1,
2900 .open = edge_open,
2901 .close = edge_close,
2902 .throttle = edge_throttle,
2903 .unthrottle = edge_unthrottle,
2904 .attach = edge_startup,
2905 .shutdown = edge_shutdown,
fc4cbd75 2906 .port_probe = edge_create_sysfs_attrs,
1da177e4
LT		 2907 .ioctl = edge_ioctl,
2908 .set_termios = edge_set_termios,
2909 .tiocmget = edge_tiocmget,
2910 .tiocmset = edge_tiocmset,
2911 .write = edge_write,
2912 .write_room = edge_write_room,
2913 .chars_in_buffer = edge_chars_in_buffer,
2914 .break_ctl = edge_break,
2915 .read_int_callback = edge_interrupt_callback,
2916 .read_bulk_callback = edge_bulk_in_callback,
2917 .write_bulk_callback = edge_bulk_out_callback,
2918};
2919
ea65370d 2920static struct usb_serial_driver edgeport_2port_device = {
18fcac35 2921 .driver = {
269bda1c
GKH		 2922 .owner = THIS_MODULE,
2923 .name = "edgeport_ti_2",
18fcac35 2924 },
269bda1c 2925 .description = "Edgeport TI 2 port adapter",
d9b1b787 2926 .usb_driver = &io_driver,
1da177e4 2927 .id_table = edgeport_2port_id_table,
1da177e4
LT		 2928 .num_ports = 2,
2929 .open = edge_open,
2930 .close = edge_close,
2931 .throttle = edge_throttle,
2932 .unthrottle = edge_unthrottle,
2933 .attach = edge_startup,
2934 .shutdown = edge_shutdown,
fc4cbd75 2935 .port_probe = edge_create_sysfs_attrs,
1da177e4
LT		 2936 .ioctl = edge_ioctl,
2937 .set_termios = edge_set_termios,
2938 .tiocmget = edge_tiocmget,
2939 .tiocmset = edge_tiocmset,
2940 .write = edge_write,
2941 .write_room = edge_write_room,
2942 .chars_in_buffer = edge_chars_in_buffer,
2943 .break_ctl = edge_break,
2944 .read_int_callback = edge_interrupt_callback,
2945 .read_bulk_callback = edge_bulk_in_callback,
2946 .write_bulk_callback = edge_bulk_out_callback,
2947};
2948
2949
2950static int __init edgeport_init(void)
2951{
2952 int retval;
2953 retval = usb_serial_register(&edgeport_1port_device);
2954 if (retval)
2955 goto failed_1port_device_register;
2956 retval = usb_serial_register(&edgeport_2port_device);
2957 if (retval)
2958 goto failed_2port_device_register;
2959 retval = usb_register(&io_driver);
2742fd88 2960 if (retval)
1da177e4
LT		 2961 goto failed_usb_register;
2962 info(DRIVER_DESC " " DRIVER_VERSION);
2963 return 0;
2964failed_usb_register:
2965 usb_serial_deregister(&edgeport_2port_device);
2966failed_2port_device_register:
2967 usb_serial_deregister(&edgeport_1port_device);
2968failed_1port_device_register:
2969 return retval;
2970}
2971
2742fd88 2972static void __exit edgeport_exit(void)
1da177e4 2973{
2742fd88
AC		 2974 usb_deregister(&io_driver);
2975 usb_serial_deregister(&edgeport_1port_device);
2976 usb_serial_deregister(&edgeport_2port_device);
1da177e4
LT		 2977}
2978
2979module_init(edgeport_init);
2980module_exit(edgeport_exit);
2981
2982/* Module information */
2983MODULE_AUTHOR(DRIVER_AUTHOR);
2984MODULE_DESCRIPTION(DRIVER_DESC);
2985MODULE_LICENSE("GPL");
d12b219a 2986MODULE_FIRMWARE("edgeport/down3.bin");
1da177e4
LT		 2987
2988module_param(debug, bool, S_IRUGO | S_IWUSR);
2989MODULE_PARM_DESC(debug, "Debug enabled or not");
2990
2991module_param(low_latency, bool, S_IRUGO | S_IWUSR);
2992MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
2993
2994module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2995MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2996
2997module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2742fd88
AC		 2998MODULE_PARM_DESC(ignore_cpu_rev,
2999 "Ignore the cpu revision when connecting to a device");
1da177e4 3000
fc4cbd75
MP		 3001module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3002MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
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