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 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along with
19 * this program; if not, write to the Free Software Foundation, Inc., 59
20 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 ******************************************************************************/
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/gfp.h>
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/timer.h>
30 #include <linux/errno.h>
31 #include <linux/proc_fs.h>
32 #include <linux/slab.h>
33 #include <linux/wait.h>
34 #include <linux/list.h>
35 #include <asm/processor.h>
36 #include <asm/uaccess.h>
37 #include <linux/smp_lock.h>
38 #include <linux/interrupt.h>
39 #include <linux/atm.h>
40 #include <linux/atmdev.h>
41 #include <linux/crc32.h>
42 #include <linux/init.h>
43 #include <linux/firmware.h>
44
45 #include "usb_atm.h"
46
47 #if defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE)
48 # define USE_FW_LOADER
49 #endif
50
51 #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
52 #define DRIVER_VERSION "1.8"
53 #define DRIVER_DESC "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
54
55 static const char speedtch_driver_name[] = "speedtch";
56
57 #define SPEEDTOUCH_VENDORID 0x06b9
58 #define SPEEDTOUCH_PRODUCTID 0x4061
59
60 /* Timeout in jiffies */
61 #define CTRL_TIMEOUT (2*HZ)
62 #define DATA_TIMEOUT (2*HZ)
63
64 #define OFFSET_7 0 /* size 1 */
65 #define OFFSET_b 1 /* size 8 */
66 #define OFFSET_d 9 /* size 4 */
67 #define OFFSET_e 13 /* size 1 */
68 #define OFFSET_f 14 /* size 1 */
69 #define TOTAL 15
70
71 #define SIZE_7 1
72 #define SIZE_b 8
73 #define SIZE_d 4
74 #define SIZE_e 1
75 #define SIZE_f 1
76
77 static int dl_512_first = 0;
78 static int sw_buffering = 0;
79
80 module_param(dl_512_first, bool, 0444);
81 MODULE_PARM_DESC(dl_512_first, "Read 512 bytes before sending firmware");
82
83 module_param(sw_buffering, uint, 0444);
84 MODULE_PARM_DESC(sw_buffering, "Enable software buffering");
85
86 #define UDSL_IOCTL_LINE_UP 1
87 #define UDSL_IOCTL_LINE_DOWN 2
88
89 #define SPEEDTCH_ENDPOINT_INT 0x81
90 #define SPEEDTCH_ENDPOINT_DATA 0x07
91 #define SPEEDTCH_ENDPOINT_FIRMWARE 0x05
92
93 #define hex2int(c) ( (c >= '') && (c <= '9') ? (c - '') : ((c & 0xf) + 9) )
94
95 static struct usb_device_id speedtch_usb_ids[] = {
96 {USB_DEVICE(SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID)},
97 {}
98 };
99
100 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
101
102 struct speedtch_instance_data {
103 struct udsl_instance_data u;
104
105 /* Status */
106 struct urb *int_urb;
107 unsigned char int_data[16];
108 struct work_struct poll_work;
109 struct timer_list poll_timer;
110 };
111 /* USB */
112
113 static int speedtch_usb_probe(struct usb_interface *intf,
114 const struct usb_device_id *id);
115 static void speedtch_usb_disconnect(struct usb_interface *intf);
116 static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code,
117 void *user_data);
118 static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs);
119 static void speedtch_poll_status(struct speedtch_instance_data *instance);
120
121 static struct usb_driver speedtch_usb_driver = {
122 .owner = THIS_MODULE,
123 .name = speedtch_driver_name,
124 .probe = speedtch_usb_probe,
125 .disconnect = speedtch_usb_disconnect,
126 .ioctl = speedtch_usb_ioctl,
127 .id_table = speedtch_usb_ids,
128 };
129
130 /***************
131 ** firmware **
132 ***************/
133
134 static void speedtch_got_firmware(struct speedtch_instance_data *instance,
135 int got_it)
136 {
137 int err;
138 struct usb_interface *intf;
139
140 down(&instance->u.serialize); /* vs self, speedtch_firmware_start */
141 if (instance->u.status == UDSL_LOADED_FIRMWARE)
142 goto out;
143 if (!got_it) {
144 instance->u.status = UDSL_NO_FIRMWARE;
145 goto out;
146 }
147 if ((err = usb_set_interface(instance->u.usb_dev, 1, 1)) < 0) {
148 dbg("speedtch_got_firmware: usb_set_interface returned %d!", err);
149 instance->u.status = UDSL_NO_FIRMWARE;
150 goto out;
151 }
152
153 /* Set up interrupt endpoint */
154 intf = usb_ifnum_to_if(instance->u.usb_dev, 0);
155 if (intf && !usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) {
156
157 instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
158 if (instance->int_urb) {
159
160 usb_fill_int_urb(instance->int_urb, instance->u.usb_dev,
161 usb_rcvintpipe(instance->u.usb_dev, SPEEDTCH_ENDPOINT_INT),
162 instance->int_data,
163 sizeof(instance->int_data),
164 speedtch_handle_int, instance, 50);
165 err = usb_submit_urb(instance->int_urb, GFP_KERNEL);
166 if (err) {
167 /* Doesn't matter; we'll poll anyway */
168 dbg("speedtch_got_firmware: Submission of interrupt URB failed %d", err);
169 usb_free_urb(instance->int_urb);
170 instance->int_urb = NULL;
171 usb_driver_release_interface(&speedtch_usb_driver, intf);
172 }
173 }
174 }
175 /* Start status polling */
176 mod_timer(&instance->poll_timer, jiffies + (1 * HZ));
177
178 instance->u.status = UDSL_LOADED_FIRMWARE;
179 tasklet_schedule(&instance->u.receive_tasklet);
180 out:
181 up(&instance->u.serialize);
182 wake_up_interruptible(&instance->u.firmware_waiters);
183 }
184
185 static int speedtch_set_swbuff(struct speedtch_instance_data *instance,
186 int state)
187 {
188 struct usb_device *dev = instance->u.usb_dev;
189 int ret;
190
191 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
192 0x32, 0x40, state ? 0x01 : 0x00,
193 0x00, NULL, 0, 100);
194 if (ret < 0) {
195 printk("Warning: %sabling SW buffering: usb_control_msg returned %d\n",
196 state ? "En" : "Dis", ret);
197 return ret;
198 }
199
200 dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis");
201 return 0;
202 }
203
204 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
205 {
206 struct usb_device *dev = instance->u.usb_dev;
207 unsigned char buf[10];
208 int ret;
209
210 /* URB 147 */
211 buf[0] = 0x1c;
212 buf[1] = 0x50;
213 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
214 0x01, 0x40, 0x0b, 0x00, buf, 2, 100);
215 if (ret < 0)
216 printk(KERN_WARNING "%s failed on URB147: %d\n", __func__, ret);
217
218 /* URB 148 */
219 buf[0] = 0x32;
220 buf[1] = 0x00;
221 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
222 0x01, 0x40, 0x02, 0x00, buf, 2, 100);
223 if (ret < 0)
224 printk(KERN_WARNING "%s failed on URB148: %d\n", __func__, ret);
225
226 /* URB 149 */
227 buf[0] = 0x01;
228 buf[1] = 0x00;
229 buf[2] = 0x01;
230 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
231 0x01, 0x40, 0x03, 0x00, buf, 3, 100);
232 if (ret < 0)
233 printk(KERN_WARNING "%s failed on URB149: %d\n", __func__, ret);
234
235 /* URB 150 */
236 buf[0] = 0x01;
237 buf[1] = 0x00;
238 buf[2] = 0x01;
239 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
240 0x01, 0x40, 0x04, 0x00, buf, 3, 100);
241 if (ret < 0)
242 printk(KERN_WARNING "%s failed on URB150: %d\n", __func__, ret);
243 }
244
245 static int speedtch_start_synchro(struct speedtch_instance_data *instance)
246 {
247 struct usb_device *dev = instance->u.usb_dev;
248 unsigned char buf[2];
249 int ret;
250
251 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
252 0x12, 0xc0, 0x04, 0x00,
253 buf, sizeof(buf), CTRL_TIMEOUT);
254 if (ret < 0) {
255 printk(KERN_WARNING "SpeedTouch: Failed to start ADSL synchronisation: %d\n", ret);
256 return ret;
257 }
258
259 dbg("speedtch_start_synchro: modem prodded. %d Bytes returned: %02x %02x", ret, buf[0], buf[1]);
260 return 0;
261 }
262
263 static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs)
264 {
265 struct speedtch_instance_data *instance = urb->context;
266 unsigned int count = urb->actual_length;
267 int ret;
268
269 /* The magic interrupt for "up state" */
270 const static unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
271 /* The magic interrupt for "down state" */
272 const static unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
273
274 switch (urb->status) {
275 case 0:
276 /* success */
277 break;
278 case -ECONNRESET:
279 case -ENOENT:
280 case -ESHUTDOWN:
281 /* this urb is terminated; clean up */
282 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
283 return;
284 default:
285 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
286 goto exit;
287 }
288
289 if (count < 6) {
290 dbg("%s - int packet too short", __func__);
291 goto exit;
292 }
293
294 if (!memcmp(up_int, instance->int_data, 6)) {
295 del_timer(&instance->poll_timer);
296 printk(KERN_NOTICE "DSL line goes up\n");
297 } else if (!memcmp(down_int, instance->int_data, 6)) {
298 printk(KERN_NOTICE "DSL line goes down\n");
299 } else {
300 int i;
301
302 printk(KERN_DEBUG "Unknown interrupt packet of %d bytes:", count);
303 for (i = 0; i < count; i++)
304 printk(" %02x", instance->int_data[i]);
305 printk("\n");
306 }
307 schedule_work(&instance->poll_work);
308
309 exit:
310 rmb();
311 if (!instance->int_urb)
312 return;
313
314 ret = usb_submit_urb(urb, GFP_ATOMIC);
315 if (ret)
316 err("%s - usb_submit_urb failed with result %d", __func__, ret);
317 }
318
319 static int speedtch_get_status(struct speedtch_instance_data *instance,
320 unsigned char *buf)
321 {
322 struct usb_device *dev = instance->u.usb_dev;
323 int ret;
324
325 memset(buf, 0, TOTAL);
326
327 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
328 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
329 CTRL_TIMEOUT);
330 if (ret < 0) {
331 dbg("MSG 7 failed");
332 return ret;
333 }
334
335 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
336 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
337 CTRL_TIMEOUT);
338 if (ret < 0) {
339 dbg("MSG B failed");
340 return ret;
341 }
342
343 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
344 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
345 CTRL_TIMEOUT);
346 if (ret < 0) {
347 dbg("MSG D failed");
348 return ret;
349 }
350
351 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
352 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
353 CTRL_TIMEOUT);
354 if (ret < 0) {
355 dbg("MSG E failed");
356 return ret;
357 }
358
359 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
360 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
361 CTRL_TIMEOUT);
362 if (ret < 0) {
363 dbg("MSG F failed");
364 return ret;
365 }
366
367 return 0;
368 }
369
370 static void speedtch_poll_status(struct speedtch_instance_data *instance)
371 {
372 unsigned char buf[TOTAL];
373 int ret;
374
375 ret = speedtch_get_status(instance, buf);
376 if (ret) {
377 printk(KERN_WARNING
378 "SpeedTouch: Error %d fetching device status\n", ret);
379 return;
380 }
381
382 dbg("Line state %02x", buf[OFFSET_7]);
383
384 switch (buf[OFFSET_7]) {
385 case 0:
386 if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) {
387 instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
388 printk(KERN_NOTICE "ADSL line is down\n");
389 }
390 break;
391
392 case 0x08:
393 if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) {
394 instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
395 printk(KERN_NOTICE "ADSL line is blocked?\n");
396 }
397 break;
398
399 case 0x10:
400 if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) {
401 instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
402 printk(KERN_NOTICE "ADSL line is synchronising\n");
403 }
404 break;
405
406 case 0x20:
407 if (instance->u.atm_dev->signal != ATM_PHY_SIG_FOUND) {
408 int down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
409 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
410 int up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
411 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
412
413 if (!(down_speed & 0x0000ffff) &&
414 !(up_speed & 0x0000ffff)) {
415 down_speed >>= 16;
416 up_speed >>= 16;
417 }
418 instance->u.atm_dev->link_rate = down_speed * 1000 / 424;
419 instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND;
420
421 printk(KERN_NOTICE
422 "ADSL line is up (%d Kib/s down | %d Kib/s up)\n",
423 down_speed, up_speed);
424 }
425 break;
426
427 default:
428 if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) {
429 instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
430 printk(KERN_NOTICE "Unknown line state %02x\n", buf[OFFSET_7]);
431 }
432 break;
433 }
434 }
435
436 static void speedtch_timer_poll(unsigned long data)
437 {
438 struct speedtch_instance_data *instance = (void *)data;
439
440 schedule_work(&instance->poll_work);
441 mod_timer(&instance->poll_timer, jiffies + (5 * HZ));
442 }
443
444 #ifdef USE_FW_LOADER
445 static void speedtch_upload_firmware(struct speedtch_instance_data *instance,
446 const struct firmware *fw1,
447 const struct firmware *fw2)
448 {
449 unsigned char *buffer;
450 struct usb_device *usb_dev = instance->u.usb_dev;
451 struct usb_interface *intf;
452 int actual_length, ret;
453 int offset;
454
455 dbg("speedtch_upload_firmware");
456
457 if (!(intf = usb_ifnum_to_if(usb_dev, 2))) {
458 dbg("speedtch_upload_firmware: interface not found!");
459 goto fail;
460 }
461
462 if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
463 dbg("speedtch_upload_firmware: no memory for buffer!");
464 goto fail;
465 }
466
467 /* A user-space firmware loader may already have claimed interface #2 */
468 if ((ret =
469 usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) < 0) {
470 dbg("speedtch_upload_firmware: interface in use (%d)!", ret);
471 goto fail_free;
472 }
473
474 /* URB 7 */
475 if (dl_512_first) { /* some modems need a read before writing the firmware */
476 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
477 buffer, 0x200, &actual_length, 2 * HZ);
478
479 if (ret < 0 && ret != -ETIMEDOUT)
480 dbg("speedtch_upload_firmware: read BLOCK0 from modem failed (%d)!", ret);
481 else
482 dbg("speedtch_upload_firmware: BLOCK0 downloaded (%d bytes)", ret);
483 }
484
485 /* URB 8 : both leds are static green */
486 for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
487 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
488 memcpy(buffer, fw1->data + offset, thislen);
489
490 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
491 buffer, thislen, &actual_length, DATA_TIMEOUT);
492
493 if (ret < 0) {
494 dbg("speedtch_upload_firmware: write BLOCK1 to modem failed (%d)!", ret);
495 goto fail_release;
496 }
497 dbg("speedtch_upload_firmware: BLOCK1 uploaded (%zu bytes)", fw1->size);
498 }
499
500 /* USB led blinking green, ADSL led off */
501
502 /* URB 11 */
503 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
504 buffer, 0x200, &actual_length, DATA_TIMEOUT);
505
506 if (ret < 0) {
507 dbg("speedtch_upload_firmware: read BLOCK2 from modem failed (%d)!", ret);
508 goto fail_release;
509 }
510 dbg("speedtch_upload_firmware: BLOCK2 downloaded (%d bytes)", actual_length);
511
512 /* URBs 12 to 139 - USB led blinking green, ADSL led off */
513 for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
514 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
515 memcpy(buffer, fw2->data + offset, thislen);
516
517 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
518 buffer, thislen, &actual_length, DATA_TIMEOUT);
519
520 if (ret < 0) {
521 dbg("speedtch_upload_firmware: write BLOCK3 to modem failed (%d)!", ret);
522 goto fail_release;
523 }
524 }
525 dbg("speedtch_upload_firmware: BLOCK3 uploaded (%zu bytes)", fw2->size);
526
527 /* USB led static green, ADSL led static red */
528
529 /* URB 142 */
530 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
531 buffer, 0x200, &actual_length, DATA_TIMEOUT);
532
533 if (ret < 0) {
534 dbg("speedtch_upload_firmware: read BLOCK4 from modem failed (%d)!", ret);
535 goto fail_release;
536 }
537
538 /* success */
539 dbg("speedtch_upload_firmware: BLOCK4 downloaded (%d bytes)", actual_length);
540
541 /* Delay to allow firmware to start up. We can do this here
542 because we're in our own kernel thread anyway. */
543 msleep(1000);
544
545 /* Enable software buffering, if requested */
546 if (sw_buffering)
547 speedtch_set_swbuff(instance, 1);
548
549 /* Magic spell; don't ask us what this does */
550 speedtch_test_sequence(instance);
551
552 /* Start modem synchronisation */
553 if (speedtch_start_synchro(instance))
554 dbg("speedtch_start_synchro: failed");
555
556 speedtch_got_firmware(instance, 1);
557
558 free_page((unsigned long)buffer);
559 return;
560
561 fail_release:
562 /* Only release interface #2 if uploading failed; we don't release it
563 we succeeded. This prevents the userspace tools from trying to load
564 the firmware themselves */
565 usb_driver_release_interface(&speedtch_usb_driver, intf);
566 fail_free:
567 free_page((unsigned long)buffer);
568 fail:
569 speedtch_got_firmware(instance, 0);
570 }
571
572 static int speedtch_find_firmware(struct speedtch_instance_data
573 *instance, int phase,
574 const struct firmware **fw_p)
575 {
576 char buf[24];
577 const u16 bcdDevice = le16_to_cpu(instance->u.usb_dev->descriptor.bcdDevice);
578 const u8 major_revision = bcdDevice >> 8;
579 const u8 minor_revision = bcdDevice & 0xff;
580
581 sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
582 dbg("speedtch_find_firmware: looking for %s", buf);
583
584 if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
585 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
586 dbg("speedtch_find_firmware: looking for %s", buf);
587
588 if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
589 sprintf(buf, "speedtch-%d.bin", phase);
590 dbg("speedtch_find_firmware: looking for %s", buf);
591
592 if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
593 dev_warn(&instance->u.usb_dev->dev, "no stage %d firmware found!", phase);
594 return -ENOENT;
595 }
596 }
597 }
598
599 dev_info(&instance->u.usb_dev->dev, "found stage %d firmware %s\n", phase, buf);
600
601 return 0;
602 }
603
604 static int speedtch_load_firmware(void *arg)
605 {
606 const struct firmware *fw1, *fw2;
607 struct speedtch_instance_data *instance = arg;
608
609 BUG_ON(!instance);
610
611 daemonize("firmware/speedtch");
612
613 if (!speedtch_find_firmware(instance, 1, &fw1)) {
614 if (!speedtch_find_firmware(instance, 2, &fw2)) {
615 speedtch_upload_firmware(instance, fw1, fw2);
616 release_firmware(fw2);
617 }
618 release_firmware(fw1);
619 }
620
621 /* In case we failed, set state back to NO_FIRMWARE so that
622 another later attempt may work. Otherwise, we never actually
623 manage to recover if, for example, the firmware is on /usr and
624 we look for it too early. */
625 speedtch_got_firmware(instance, 0);
626
627 module_put(THIS_MODULE);
628 udsl_put_instance(&instance->u);
629 return 0;
630 }
631 #endif /* USE_FW_LOADER */
632
633 static void speedtch_firmware_start(struct speedtch_instance_data *instance)
634 {
635 #ifdef USE_FW_LOADER
636 int ret;
637 #endif
638
639 dbg("speedtch_firmware_start");
640
641 down(&instance->u.serialize); /* vs self, speedtch_got_firmware */
642
643 if (instance->u.status >= UDSL_LOADING_FIRMWARE) {
644 up(&instance->u.serialize);
645 return;
646 }
647
648 instance->u.status = UDSL_LOADING_FIRMWARE;
649 up(&instance->u.serialize);
650
651 #ifdef USE_FW_LOADER
652 udsl_get_instance(&instance->u);
653 try_module_get(THIS_MODULE);
654
655 ret = kernel_thread(speedtch_load_firmware, instance,
656 CLONE_FS | CLONE_FILES);
657
658 if (ret >= 0)
659 return; /* OK */
660
661 dbg("speedtch_firmware_start: kernel_thread failed (%d)!", ret);
662
663 module_put(THIS_MODULE);
664 udsl_put_instance(&instance->u);
665 /* Just pretend it never happened... hope modem_run happens */
666 #endif /* USE_FW_LOADER */
667
668 speedtch_got_firmware(instance, 0);
669 }
670
671 static int speedtch_firmware_wait(struct udsl_instance_data *instance)
672 {
673 speedtch_firmware_start((void *)instance);
674
675 if (wait_event_interruptible(instance->firmware_waiters, instance->status != UDSL_LOADING_FIRMWARE) < 0)
676 return -ERESTARTSYS;
677
678 return (instance->status == UDSL_LOADED_FIRMWARE) ? 0 : -EAGAIN;
679 }
680
681 /**********
682 ** USB **
683 **********/
684
685 static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code,
686 void *user_data)
687 {
688 struct speedtch_instance_data *instance = usb_get_intfdata(intf);
689
690 dbg("speedtch_usb_ioctl entered");
691
692 if (!instance) {
693 dbg("speedtch_usb_ioctl: NULL instance!");
694 return -ENODEV;
695 }
696
697 switch (code) {
698 case UDSL_IOCTL_LINE_UP:
699 instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND;
700 speedtch_got_firmware(instance, 1);
701 return (instance->u.status == UDSL_LOADED_FIRMWARE) ? 0 : -EIO;
702 case UDSL_IOCTL_LINE_DOWN:
703 instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
704 return 0;
705 default:
706 return -ENOTTY;
707 }
708 }
709
710 static int speedtch_usb_probe(struct usb_interface *intf,
711 const struct usb_device_id *id)
712 {
713 struct usb_device *dev = interface_to_usbdev(intf);
714 int ifnum = intf->altsetting->desc.bInterfaceNumber;
715 struct speedtch_instance_data *instance;
716 unsigned char mac_str[13];
717 int ret, i;
718 char buf7[SIZE_7];
719
720 dbg("speedtch_usb_probe: trying device with vendor=0x%x, product=0x%x, ifnum %d",
721 le16_to_cpu(dev->descriptor.idVendor),
722 le16_to_cpu(dev->descriptor.idProduct), ifnum);
723
724 if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) ||
725 (ifnum != 1))
726 return -ENODEV;
727
728 dbg("speedtch_usb_probe: device accepted");
729
730 /* instance init */
731 instance = kmalloc(sizeof(*instance), GFP_KERNEL);
732 if (!instance) {
733 dbg("speedtch_usb_probe: no memory for instance data!");
734 return -ENOMEM;
735 }
736
737 memset(instance, 0, sizeof(struct speedtch_instance_data));
738
739 if ((ret = usb_set_interface(dev, 0, 0)) < 0)
740 goto fail;
741
742 if ((ret = usb_set_interface(dev, 2, 0)) < 0)
743 goto fail;
744
745 instance->u.data_endpoint = SPEEDTCH_ENDPOINT_DATA;
746 instance->u.firmware_wait = speedtch_firmware_wait;
747 instance->u.driver_name = speedtch_driver_name;
748
749 ret = udsl_instance_setup(dev, &instance->u);
750 if (ret)
751 goto fail;
752
753 init_timer(&instance->poll_timer);
754 instance->poll_timer.function = speedtch_timer_poll;
755 instance->poll_timer.data = (unsigned long)instance;
756
757 INIT_WORK(&instance->poll_work, (void *)speedtch_poll_status, instance);
758
759 /* set MAC address, it is stored in the serial number */
760 memset(instance->u.atm_dev->esi, 0, sizeof(instance->u.atm_dev->esi));
761 if (usb_string(dev, dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
762 for (i = 0; i < 6; i++)
763 instance->u.atm_dev->esi[i] =
764 (hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1]));
765 }
766
767 /* First check whether the modem already seems to be alive */
768 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
769 0x12, 0xc0, 0x07, 0x00, buf7, SIZE_7, HZ / 2);
770
771 if (ret == SIZE_7) {
772 dbg("firmware appears to be already loaded");
773 speedtch_got_firmware(instance, 1);
774 speedtch_poll_status(instance);
775 } else {
776 speedtch_firmware_start(instance);
777 }
778
779 usb_set_intfdata(intf, instance);
780
781 return 0;
782
783 fail:
784 kfree(instance);
785
786 return -ENOMEM;
787 }
788
789 static void speedtch_usb_disconnect(struct usb_interface *intf)
790 {
791 struct speedtch_instance_data *instance = usb_get_intfdata(intf);
792
793 dbg("speedtch_usb_disconnect entered");
794
795 if (!instance) {
796 dbg("speedtch_usb_disconnect: NULL instance!");
797 return;
798 }
799
800 /*QQ need to handle disconnects on interface #2 while uploading firmware */
801 /*QQ and what about interface #1? */
802
803 if (instance->int_urb) {
804 struct urb *int_urb = instance->int_urb;
805 instance->int_urb = NULL;
806 wmb();
807 usb_unlink_urb(int_urb);
808 usb_free_urb(int_urb);
809 }
810
811 instance->int_data[0] = 1;
812 del_timer_sync(&instance->poll_timer);
813 wmb();
814 flush_scheduled_work();
815
816 udsl_instance_disconnect(&instance->u);
817
818 /* clean up */
819 usb_set_intfdata(intf, NULL);
820 udsl_put_instance(&instance->u);
821 }
822
823 /***********
824 ** init **
825 ***********/
826
827 static int __init speedtch_usb_init(void)
828 {
829 dbg("speedtch_usb_init: driver version " DRIVER_VERSION);
830
831 return usb_register(&speedtch_usb_driver);
832 }
833
834 static void __exit speedtch_usb_cleanup(void)
835 {
836 dbg("speedtch_usb_cleanup entered");
837
838 usb_deregister(&speedtch_usb_driver);
839 }
840
841 module_init(speedtch_usb_init);
842 module_exit(speedtch_usb_cleanup);
843
844 MODULE_AUTHOR(DRIVER_AUTHOR);
845 MODULE_DESCRIPTION(DRIVER_DESC);
846 MODULE_LICENSE("GPL");
847 MODULE_VERSION(DRIVER_VERSION);
848
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