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Linux v2.6.13
[linux-2.6/next.git] / drivers / usb / atm / speedtch.c
blobd0cbbb7f0385df42d3152646b51cfbedf1667d3f
1 /******************************************************************************
2 * speedtch.c - Alcatel SpeedTouch USB xDSL modem driver
3 *
4 * Copyright (C) 2001, Alcatel
5 * Copyright (C) 2003, Duncan Sands
6 * Copyright (C) 2004, David Woodhouse
7 *
8 * Based on "modem_run.c", copyright (C) 2001, Benoit Papillault
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 * You should have received a copy of the GNU General Public License along with
21 * this program; if not, write to the Free Software Foundation, Inc., 59
22 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 ******************************************************************************/
25
26 #include <asm/page.h>
27 #include <linux/device.h>
28 #include <linux/errno.h>
29 #include <linux/firmware.h>
30 #include <linux/gfp.h>
31 #include <linux/init.h>
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/slab.h>
36 #include <linux/stat.h>
37 #include <linux/timer.h>
38 #include <linux/workqueue.h>
39
40 #include "usbatm.h"
41
42 #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
43 #define DRIVER_VERSION "1.9"
44 #define DRIVER_DESC "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
45
46 static const char speedtch_driver_name[] = "speedtch";
47
48 #define CTRL_TIMEOUT 2000 /* milliseconds */
49 #define DATA_TIMEOUT 2000 /* milliseconds */
50
51 #define OFFSET_7 0 /* size 1 */
52 #define OFFSET_b 1 /* size 8 */
53 #define OFFSET_d 9 /* size 4 */
54 #define OFFSET_e 13 /* size 1 */
55 #define OFFSET_f 14 /* size 1 */
56 #define TOTAL 15
57
58 #define SIZE_7 1
59 #define SIZE_b 8
60 #define SIZE_d 4
61 #define SIZE_e 1
62 #define SIZE_f 1
63
64 #define MIN_POLL_DELAY 5000 /* milliseconds */
65 #define MAX_POLL_DELAY 60000 /* milliseconds */
66
67 #define RESUBMIT_DELAY 1000 /* milliseconds */
68
69 #define DEFAULT_ALTSETTING 1
70 #define DEFAULT_DL_512_FIRST 0
71 #define DEFAULT_SW_BUFFERING 0
72
73 static int altsetting = DEFAULT_ALTSETTING;
74 static int dl_512_first = DEFAULT_DL_512_FIRST;
75 static int sw_buffering = DEFAULT_SW_BUFFERING;
76
77 module_param(altsetting, int, S_IRUGO | S_IWUSR);
78 MODULE_PARM_DESC(altsetting,
79 "Alternative setting for data interface (default: "
80 __MODULE_STRING(DEFAULT_ALTSETTING) ")");
81
82 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
83 MODULE_PARM_DESC(dl_512_first,
84 "Read 512 bytes before sending firmware (default: "
85 __MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
86
87 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
88 MODULE_PARM_DESC(sw_buffering,
89 "Enable software buffering (default: "
90 __MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
91
92 #define ENDPOINT_INT 0x81
93 #define ENDPOINT_DATA 0x07
94 #define ENDPOINT_FIRMWARE 0x05
95
96 #define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) )
97
98 struct speedtch_instance_data {
99 struct usbatm_data *usbatm;
100
101 struct work_struct status_checker;
102
103 unsigned char last_status;
104
105 int poll_delay; /* milliseconds */
106
107 struct timer_list resubmit_timer;
108 struct urb *int_urb;
109 unsigned char int_data[16];
110
111 unsigned char scratch_buffer[TOTAL];
112 };
113
114 /***************
115 ** firmware **
116 ***************/
117
118 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state)
119 {
120 struct usbatm_data *usbatm = instance->usbatm;
121 struct usb_device *usb_dev = usbatm->usb_dev;
122 int ret;
123
124 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
125 0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT);
126 if (ret < 0)
127 usb_warn(usbatm,
128 "%sabling SW buffering: usb_control_msg returned %d\n",
129 state ? "En" : "Dis", ret);
130 else
131 dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis");
132 }
133
134 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
135 {
136 struct usbatm_data *usbatm = instance->usbatm;
137 struct usb_device *usb_dev = usbatm->usb_dev;
138 unsigned char *buf = instance->scratch_buffer;
139 int ret;
140
141 /* URB 147 */
142 buf[0] = 0x1c;
143 buf[1] = 0x50;
144 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
145 0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT);
146 if (ret < 0)
147 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret);
148
149 /* URB 148 */
150 buf[0] = 0x32;
151 buf[1] = 0x00;
152 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
153 0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT);
154 if (ret < 0)
155 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret);
156
157 /* URB 149 */
158 buf[0] = 0x01;
159 buf[1] = 0x00;
160 buf[2] = 0x01;
161 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
162 0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT);
163 if (ret < 0)
164 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret);
165
166 /* URB 150 */
167 buf[0] = 0x01;
168 buf[1] = 0x00;
169 buf[2] = 0x01;
170 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
171 0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT);
172 if (ret < 0)
173 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret);
174 }
175
176 static int speedtch_upload_firmware(struct speedtch_instance_data *instance,
177 const struct firmware *fw1,
178 const struct firmware *fw2)
179 {
180 unsigned char *buffer;
181 struct usbatm_data *usbatm = instance->usbatm;
182 struct usb_interface *intf;
183 struct usb_device *usb_dev = usbatm->usb_dev;
184 int actual_length;
185 int ret = 0;
186 int offset;
187
188 usb_dbg(usbatm, "%s entered\n", __func__);
189
190 if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
191 ret = -ENOMEM;
192 usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__);
193 goto out;
194 }
195
196 if (!(intf = usb_ifnum_to_if(usb_dev, 2))) {
197 ret = -ENODEV;
198 usb_dbg(usbatm, "%s: interface not found!\n", __func__);
199 goto out_free;
200 }
201
202 /* URB 7 */
203 if (dl_512_first) { /* some modems need a read before writing the firmware */
204 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
205 buffer, 0x200, &actual_length, 2000);
206
207 if (ret < 0 && ret != -ETIMEDOUT)
208 usb_dbg(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret);
209 else
210 usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret);
211 }
212
213 /* URB 8 : both leds are static green */
214 for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
215 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
216 memcpy(buffer, fw1->data + offset, thislen);
217
218 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
219 buffer, thislen, &actual_length, DATA_TIMEOUT);
220
221 if (ret < 0) {
222 usb_dbg(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret);
223 goto out_free;
224 }
225 usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size);
226 }
227
228 /* USB led blinking green, ADSL led off */
229
230 /* URB 11 */
231 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
232 buffer, 0x200, &actual_length, DATA_TIMEOUT);
233
234 if (ret < 0) {
235 usb_dbg(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret);
236 goto out_free;
237 }
238 usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length);
239
240 /* URBs 12 to 139 - USB led blinking green, ADSL led off */
241 for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
242 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
243 memcpy(buffer, fw2->data + offset, thislen);
244
245 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
246 buffer, thislen, &actual_length, DATA_TIMEOUT);
247
248 if (ret < 0) {
249 usb_dbg(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret);
250 goto out_free;
251 }
252 }
253 usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size);
254
255 /* USB led static green, ADSL led static red */
256
257 /* URB 142 */
258 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
259 buffer, 0x200, &actual_length, DATA_TIMEOUT);
260
261 if (ret < 0) {
262 usb_dbg(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret);
263 goto out_free;
264 }
265
266 /* success */
267 usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length);
268
269 /* Delay to allow firmware to start up. We can do this here
270 because we're in our own kernel thread anyway. */
271 msleep_interruptible(1000);
272
273 /* Enable software buffering, if requested */
274 if (sw_buffering)
275 speedtch_set_swbuff(instance, 1);
276
277 /* Magic spell; don't ask us what this does */
278 speedtch_test_sequence(instance);
279
280 ret = 0;
281
282 out_free:
283 free_page((unsigned long)buffer);
284 out:
285 return ret;
286 }
287
288 static int speedtch_find_firmware(struct usb_interface *intf, int phase,
289 const struct firmware **fw_p)
290 {
291 struct device *dev = &intf->dev;
292 const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice);
293 const u8 major_revision = bcdDevice >> 8;
294 const u8 minor_revision = bcdDevice & 0xff;
295 char buf[24];
296
297 sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
298 dev_dbg(dev, "%s: looking for %s\n", __func__, buf);
299
300 if (request_firmware(fw_p, buf, dev)) {
301 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
302 dev_dbg(dev, "%s: looking for %s\n", __func__, buf);
303
304 if (request_firmware(fw_p, buf, dev)) {
305 sprintf(buf, "speedtch-%d.bin", phase);
306 dev_dbg(dev, "%s: looking for %s\n", __func__, buf);
307
308 if (request_firmware(fw_p, buf, dev)) {
309 dev_warn(dev, "no stage %d firmware found!\n", phase);
310 return -ENOENT;
311 }
312 }
313 }
314
315 dev_info(dev, "found stage %d firmware %s\n", phase, buf);
316
317 return 0;
318 }
319
320 static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf)
321 {
322 const struct firmware *fw1, *fw2;
323 struct speedtch_instance_data *instance = usbatm->driver_data;
324 int ret;
325
326 if ((ret = speedtch_find_firmware(intf, 1, &fw1)) < 0)
327 return ret;
328
329 if ((ret = speedtch_find_firmware(intf, 2, &fw2)) < 0) {
330 release_firmware(fw1);
331 return ret;
332 }
333
334 ret = speedtch_upload_firmware(instance, fw1, fw2);
335
336 release_firmware(fw2);
337 release_firmware(fw1);
338
339 return ret;
340 }
341
342
343 /**********
344 ** ATM **
345 **********/
346
347 static int speedtch_read_status(struct speedtch_instance_data *instance)
348 {
349 struct usbatm_data *usbatm = instance->usbatm;
350 struct usb_device *usb_dev = usbatm->usb_dev;
351 unsigned char *buf = instance->scratch_buffer;
352 int ret;
353
354 memset(buf, 0, TOTAL);
355
356 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
357 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
358 CTRL_TIMEOUT);
359 if (ret < 0) {
360 atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__);
361 return ret;
362 }
363
364 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
365 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
366 CTRL_TIMEOUT);
367 if (ret < 0) {
368 atm_dbg(usbatm, "%s: MSG B failed\n", __func__);
369 return ret;
370 }
371
372 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
373 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
374 CTRL_TIMEOUT);
375 if (ret < 0) {
376 atm_dbg(usbatm, "%s: MSG D failed\n", __func__);
377 return ret;
378 }
379
380 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
381 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
382 CTRL_TIMEOUT);
383 if (ret < 0) {
384 atm_dbg(usbatm, "%s: MSG E failed\n", __func__);
385 return ret;
386 }
387
388 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
389 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
390 CTRL_TIMEOUT);
391 if (ret < 0) {
392 atm_dbg(usbatm, "%s: MSG F failed\n", __func__);
393 return ret;
394 }
395
396 return 0;
397 }
398
399 static int speedtch_start_synchro(struct speedtch_instance_data *instance)
400 {
401 struct usbatm_data *usbatm = instance->usbatm;
402 struct usb_device *usb_dev = usbatm->usb_dev;
403 unsigned char *buf = instance->scratch_buffer;
404 int ret;
405
406 atm_dbg(usbatm, "%s entered\n", __func__);
407
408 memset(buf, 0, 2);
409
410 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
411 0x12, 0xc0, 0x04, 0x00,
412 buf, 2, CTRL_TIMEOUT);
413
414 if (ret < 0)
415 atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret);
416 else
417 atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n",
418 __func__, ret, buf[0], buf[1]);
419
420 return ret;
421 }
422
423 static void speedtch_check_status(struct speedtch_instance_data *instance)
424 {
425 struct usbatm_data *usbatm = instance->usbatm;
426 struct atm_dev *atm_dev = usbatm->atm_dev;
427 unsigned char *buf = instance->scratch_buffer;
428 int down_speed, up_speed, ret;
429 unsigned char status;
430
431 atm_dbg(usbatm, "%s entered\n", __func__);
432
433 ret = speedtch_read_status(instance);
434 if (ret < 0) {
435 atm_warn(usbatm, "error %d fetching device status\n", ret);
436 instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY);
437 return;
438 }
439
440 instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY);
441
442 status = buf[OFFSET_7];
443
444 atm_dbg(usbatm, "%s: line state %02x\n", __func__, status);
445
446 if ((status != instance->last_status) || !status) {
447 switch (status) {
448 case 0:
449 atm_dev->signal = ATM_PHY_SIG_LOST;
450 if (instance->last_status)
451 atm_info(usbatm, "ADSL line is down\n");
452 /* It may never resync again unless we ask it to... */
453 ret = speedtch_start_synchro(instance);
454 break;
455
456 case 0x08:
457 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
458 atm_info(usbatm, "ADSL line is blocked?\n");
459 break;
460
461 case 0x10:
462 atm_dev->signal = ATM_PHY_SIG_LOST;
463 atm_info(usbatm, "ADSL line is synchronising\n");
464 break;
465
466 case 0x20:
467 down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
468 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
469 up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
470 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
471
472 if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) {
473 down_speed >>= 16;
474 up_speed >>= 16;
475 }
476
477 atm_dev->link_rate = down_speed * 1000 / 424;
478 atm_dev->signal = ATM_PHY_SIG_FOUND;
479
480 atm_info(usbatm,
481 "ADSL line is up (%d kb/s down | %d kb/s up)\n",
482 down_speed, up_speed);
483 break;
484
485 default:
486 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
487 atm_info(usbatm, "Unknown line state %02x\n", status);
488 break;
489 }
490
491 instance->last_status = status;
492 }
493 }
494
495 static void speedtch_status_poll(unsigned long data)
496 {
497 struct speedtch_instance_data *instance = (void *)data;
498
499 schedule_work(&instance->status_checker);
500
501 /* The following check is racy, but the race is harmless */
502 if (instance->poll_delay < MAX_POLL_DELAY)
503 mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(instance->poll_delay));
504 else
505 atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n");
506 }
507
508 static void speedtch_resubmit_int(unsigned long data)
509 {
510 struct speedtch_instance_data *instance = (void *)data;
511 struct urb *int_urb = instance->int_urb;
512 int ret;
513
514 atm_dbg(instance->usbatm, "%s entered\n", __func__);
515
516 if (int_urb) {
517 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
518 if (!ret)
519 schedule_work(&instance->status_checker);
520 else {
521 atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
522 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
523 }
524 }
525 }
526
527 static void speedtch_handle_int(struct urb *int_urb, struct pt_regs *regs)
528 {
529 struct speedtch_instance_data *instance = int_urb->context;
530 struct usbatm_data *usbatm = instance->usbatm;
531 unsigned int count = int_urb->actual_length;
532 int ret = int_urb->status;
533
534 /* The magic interrupt for "up state" */
535 const static unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
536 /* The magic interrupt for "down state" */
537 const static unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
538
539 atm_dbg(usbatm, "%s entered\n", __func__);
540
541 if (ret < 0) {
542 atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, ret);
543 goto fail;
544 }
545
546 if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) {
547 del_timer(&instance->status_checker.timer);
548 atm_info(usbatm, "DSL line goes up\n");
549 } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) {
550 atm_info(usbatm, "DSL line goes down\n");
551 } else {
552 int i;
553
554 atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count);
555 for (i = 0; i < count; i++)
556 printk(" %02x", instance->int_data[i]);
557 printk("\n");
558 goto fail;
559 }
560
561 if ((int_urb = instance->int_urb)) {
562 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
563 schedule_work(&instance->status_checker);
564 if (ret < 0) {
565 atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
566 goto fail;
567 }
568 }
569
570 return;
571
572 fail:
573 if ((int_urb = instance->int_urb))
574 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
575 }
576
577 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
578 {
579 struct usb_device *usb_dev = usbatm->usb_dev;
580 struct speedtch_instance_data *instance = usbatm->driver_data;
581 int i, ret;
582 unsigned char mac_str[13];
583
584 atm_dbg(usbatm, "%s entered\n", __func__);
585
586 if ((ret = usb_set_interface(usb_dev, 1, altsetting)) < 0) {
587 atm_dbg(usbatm, "%s: usb_set_interface returned %d!\n", __func__, ret);
588 return ret;
589 }
590
591 /* Set MAC address, it is stored in the serial number */
592 memset(atm_dev->esi, 0, sizeof(atm_dev->esi));
593 if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
594 for (i = 0; i < 6; i++)
595 atm_dev->esi[i] = (hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1]));
596 }
597
598 /* Start modem synchronisation */
599 ret = speedtch_start_synchro(instance);
600
601 /* Set up interrupt endpoint */
602 if (instance->int_urb) {
603 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
604 if (ret < 0) {
605 /* Doesn't matter; we'll poll anyway */
606 atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
607 usb_free_urb(instance->int_urb);
608 instance->int_urb = NULL;
609 }
610 }
611
612 /* Start status polling */
613 mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(1000));
614
615 return 0;
616 }
617
618 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
619 {
620 struct speedtch_instance_data *instance = usbatm->driver_data;
621 struct urb *int_urb = instance->int_urb;
622
623 atm_dbg(usbatm, "%s entered\n", __func__);
624
625 del_timer_sync(&instance->status_checker.timer);
626
627 /*
628 * Since resubmit_timer and int_urb can schedule themselves and
629 * each other, shutting them down correctly takes some care
630 */
631 instance->int_urb = NULL; /* signal shutdown */
632 mb();
633 usb_kill_urb(int_urb);
634 del_timer_sync(&instance->resubmit_timer);
635 /*
636 * At this point, speedtch_handle_int and speedtch_resubmit_int
637 * can run or be running, but instance->int_urb == NULL means that
638 * they will not reschedule
639 */
640 usb_kill_urb(int_urb);
641 del_timer_sync(&instance->resubmit_timer);
642 usb_free_urb(int_urb);
643
644 flush_scheduled_work();
645 }
646
647
648 /**********
649 ** USB **
650 **********/
651
652 static struct usb_device_id speedtch_usb_ids[] = {
653 {USB_DEVICE(0x06b9, 0x4061)},
654 {}
655 };
656
657 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
658
659 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
660
661 static struct usb_driver speedtch_usb_driver = {
662 .owner = THIS_MODULE,
663 .name = speedtch_driver_name,
664 .probe = speedtch_usb_probe,
665 .disconnect = usbatm_usb_disconnect,
666 .id_table = speedtch_usb_ids
667 };
668
669 static void speedtch_release_interfaces(struct usb_device *usb_dev, int num_interfaces) {
670 struct usb_interface *cur_intf;
671 int i;
672
673 for(i = 0; i < num_interfaces; i++)
674 if ((cur_intf = usb_ifnum_to_if(usb_dev, i))) {
675 usb_set_intfdata(cur_intf, NULL);
676 usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
677 }
678 }
679
680 static int speedtch_bind(struct usbatm_data *usbatm,
681 struct usb_interface *intf,
682 const struct usb_device_id *id,
683 int *need_heavy_init)
684 {
685 struct usb_device *usb_dev = interface_to_usbdev(intf);
686 struct usb_interface *cur_intf;
687 struct speedtch_instance_data *instance;
688 int ifnum = intf->altsetting->desc.bInterfaceNumber;
689 int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
690 int i, ret;
691
692 usb_dbg(usbatm, "%s entered\n", __func__);
693
694 if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
695 usb_dbg(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
696 return -ENODEV;
697 }
698
699 /* claim all interfaces */
700
701 for (i=0; i < num_interfaces; i++) {
702 cur_intf = usb_ifnum_to_if(usb_dev, i);
703
704 if ((i != ifnum) && cur_intf) {
705 ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
706
707 if (ret < 0) {
708 usb_dbg(usbatm, "%s: failed to claim interface %d (%d)\n", __func__, i, ret);
709 speedtch_release_interfaces(usb_dev, i);
710 return ret;
711 }
712 }
713 }
714
715 instance = kmalloc(sizeof(*instance), GFP_KERNEL);
716
717 if (!instance) {
718 usb_dbg(usbatm, "%s: no memory for instance data!\n", __func__);
719 ret = -ENOMEM;
720 goto fail_release;
721 }
722
723 memset(instance, 0, sizeof(struct speedtch_instance_data));
724
725 instance->usbatm = usbatm;
726
727 INIT_WORK(&instance->status_checker, (void *)speedtch_check_status, instance);
728
729 instance->status_checker.timer.function = speedtch_status_poll;
730 instance->status_checker.timer.data = (unsigned long)instance;
731 instance->last_status = 0xff;
732 instance->poll_delay = MIN_POLL_DELAY;
733
734 init_timer(&instance->resubmit_timer);
735 instance->resubmit_timer.function = speedtch_resubmit_int;
736 instance->resubmit_timer.data = (unsigned long)instance;
737
738 instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
739
740 if (instance->int_urb)
741 usb_fill_int_urb(instance->int_urb, usb_dev,
742 usb_rcvintpipe(usb_dev, ENDPOINT_INT),
743 instance->int_data, sizeof(instance->int_data),
744 speedtch_handle_int, instance, 50);
745 else
746 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
747
748 /* check whether the modem already seems to be alive */
749 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
750 0x12, 0xc0, 0x07, 0x00,
751 instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
752
753 *need_heavy_init = (ret != SIZE_7);
754
755 usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, need_heavy_init ? "not" : "already");
756
757 if (*need_heavy_init)
758 if ((ret = usb_reset_device(usb_dev)) < 0)
759 goto fail_free;
760
761 usbatm->driver_data = instance;
762
763 return 0;
764
765 fail_free:
766 usb_free_urb(instance->int_urb);
767 kfree(instance);
768 fail_release:
769 speedtch_release_interfaces(usb_dev, num_interfaces);
770 return ret;
771 }
772
773 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
774 {
775 struct usb_device *usb_dev = interface_to_usbdev(intf);
776 struct speedtch_instance_data *instance = usbatm->driver_data;
777
778 usb_dbg(usbatm, "%s entered\n", __func__);
779
780 speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
781 usb_free_urb(instance->int_urb);
782 kfree(instance);
783 }
784
785
786 /***********
787 ** init **
788 ***********/
789
790 static struct usbatm_driver speedtch_usbatm_driver = {
791 .owner = THIS_MODULE,
792 .driver_name = speedtch_driver_name,
793 .bind = speedtch_bind,
794 .heavy_init = speedtch_heavy_init,
795 .unbind = speedtch_unbind,
796 .atm_start = speedtch_atm_start,
797 .atm_stop = speedtch_atm_stop,
798 .in = ENDPOINT_DATA,
799 .out = ENDPOINT_DATA
800 };
801
802 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
803 {
804 return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
805 }
806
807 static int __init speedtch_usb_init(void)
808 {
809 dbg("%s: driver version %s", __func__, DRIVER_VERSION);
810
811 return usb_register(&speedtch_usb_driver);
812 }
813
814 static void __exit speedtch_usb_cleanup(void)
815 {
816 dbg("%s", __func__);
817
818 usb_deregister(&speedtch_usb_driver);
819 }
820
821 module_init(speedtch_usb_init);
822 module_exit(speedtch_usb_cleanup);
823
824 MODULE_AUTHOR(DRIVER_AUTHOR);
825 MODULE_DESCRIPTION(DRIVER_DESC);
826 MODULE_LICENSE("GPL");
827 MODULE_VERSION(DRIVER_VERSION);
linux-next