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x86, mrst: use a temporary variable for SFI irq
[linux-btrfs-devel.git] / drivers / usb / atm / speedtch.c
blob0842cfbf60cfcf74ec08b835d469c1f1c8f26ada
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/init.h>
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/slab.h>
35 #include <linux/stat.h>
36 #include <linux/timer.h>
37 #include <linux/types.h>
38 #include <linux/usb/ch9.h>
39 #include <linux/workqueue.h>
40
41 #include "usbatm.h"
42
43 #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
44 #define DRIVER_VERSION "1.10"
45 #define DRIVER_DESC "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
46
47 static const char speedtch_driver_name[] = "speedtch";
48
49 #define CTRL_TIMEOUT 2000 /* milliseconds */
50 #define DATA_TIMEOUT 2000 /* milliseconds */
51
52 #define OFFSET_7 0 /* size 1 */
53 #define OFFSET_b 1 /* size 8 */
54 #define OFFSET_d 9 /* size 4 */
55 #define OFFSET_e 13 /* size 1 */
56 #define OFFSET_f 14 /* size 1 */
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_BULK_ALTSETTING 1
70 #define DEFAULT_ISOC_ALTSETTING 3
71 #define DEFAULT_DL_512_FIRST 0
72 #define DEFAULT_ENABLE_ISOC 0
73 #define DEFAULT_SW_BUFFERING 0
74
75 static unsigned int altsetting = 0; /* zero means: use the default */
76 static int dl_512_first = DEFAULT_DL_512_FIRST;
77 static int enable_isoc = DEFAULT_ENABLE_ISOC;
78 static int sw_buffering = DEFAULT_SW_BUFFERING;
79
80 #define DEFAULT_B_MAX_DSL 8128
81 #define DEFAULT_MODEM_MODE 11
82 #define MODEM_OPTION_LENGTH 16
83 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
84 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
85 };
86
87 static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL;
88 static unsigned char ModemMode = DEFAULT_MODEM_MODE;
89 static unsigned char ModemOption[MODEM_OPTION_LENGTH];
90 static unsigned int num_ModemOption;
91
92 module_param(altsetting, uint, S_IRUGO | S_IWUSR);
93 MODULE_PARM_DESC(altsetting,
94 "Alternative setting for data interface (bulk_default: "
95 __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: "
96 __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")");
97
98 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
99 MODULE_PARM_DESC(dl_512_first,
100 "Read 512 bytes before sending firmware (default: "
101 __MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
102
103 module_param(enable_isoc, bool, S_IRUGO | S_IWUSR);
104 MODULE_PARM_DESC(enable_isoc,
105 "Use isochronous transfers if available (default: "
106 __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")");
107
108 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
109 MODULE_PARM_DESC(sw_buffering,
110 "Enable software buffering (default: "
111 __MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
112
113 module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR);
114 MODULE_PARM_DESC(BMaxDSL,
115 "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL));
116
117 module_param(ModemMode, byte, S_IRUGO | S_IWUSR);
118 MODULE_PARM_DESC(ModemMode,
119 "default: " __MODULE_STRING(DEFAULT_MODEM_MODE));
120
121 module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO);
122 MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20");
123
124 #define INTERFACE_DATA 1
125 #define ENDPOINT_INT 0x81
126 #define ENDPOINT_BULK_DATA 0x07
127 #define ENDPOINT_ISOC_DATA 0x07
128 #define ENDPOINT_FIRMWARE 0x05
129
130 struct speedtch_params {
131 unsigned int altsetting;
132 unsigned int BMaxDSL;
133 unsigned char ModemMode;
134 unsigned char ModemOption[MODEM_OPTION_LENGTH];
135 };
136
137 struct speedtch_instance_data {
138 struct usbatm_data *usbatm;
139
140 struct speedtch_params params; /* set in probe, constant afterwards */
141
142 struct timer_list status_check_timer;
143 struct work_struct status_check_work;
144
145 unsigned char last_status;
146
147 int poll_delay; /* milliseconds */
148
149 struct timer_list resubmit_timer;
150 struct urb *int_urb;
151 unsigned char int_data[16];
152
153 unsigned char scratch_buffer[16];
154 };
155
156 /***************
157 ** firmware **
158 ***************/
159
160 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state)
161 {
162 struct usbatm_data *usbatm = instance->usbatm;
163 struct usb_device *usb_dev = usbatm->usb_dev;
164 int ret;
165
166 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
167 0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT);
168 if (ret < 0)
169 usb_warn(usbatm,
170 "%sabling SW buffering: usb_control_msg returned %d\n",
171 state ? "En" : "Dis", ret);
172 else
173 dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis");
174 }
175
176 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
177 {
178 struct usbatm_data *usbatm = instance->usbatm;
179 struct usb_device *usb_dev = usbatm->usb_dev;
180 unsigned char *buf = instance->scratch_buffer;
181 int ret;
182
183 /* URB 147 */
184 buf[0] = 0x1c;
185 buf[1] = 0x50;
186 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
187 0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT);
188 if (ret < 0)
189 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret);
190
191 /* URB 148 */
192 buf[0] = 0x32;
193 buf[1] = 0x00;
194 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
195 0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT);
196 if (ret < 0)
197 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret);
198
199 /* URB 149 */
200 buf[0] = 0x01;
201 buf[1] = 0x00;
202 buf[2] = 0x01;
203 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
204 0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT);
205 if (ret < 0)
206 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret);
207
208 /* URB 150 */
209 buf[0] = 0x01;
210 buf[1] = 0x00;
211 buf[2] = 0x01;
212 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
213 0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT);
214 if (ret < 0)
215 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret);
216
217 /* Extra initialisation in recent drivers - gives higher speeds */
218
219 /* URBext1 */
220 buf[0] = instance->params.ModemMode;
221 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
222 0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT);
223 if (ret < 0)
224 usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret);
225
226 /* URBext2 */
227 /* This seems to be the one which actually triggers the higher sync
228 rate -- it does require the new firmware too, although it works OK
229 with older firmware */
230 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
231 0x01, 0x40, 0x14, 0x00,
232 instance->params.ModemOption,
233 MODEM_OPTION_LENGTH, CTRL_TIMEOUT);
234 if (ret < 0)
235 usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret);
236
237 /* URBext3 */
238 buf[0] = instance->params.BMaxDSL & 0xff;
239 buf[1] = instance->params.BMaxDSL >> 8;
240 ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
241 0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT);
242 if (ret < 0)
243 usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret);
244 }
245
246 static int speedtch_upload_firmware(struct speedtch_instance_data *instance,
247 const struct firmware *fw1,
248 const struct firmware *fw2)
249 {
250 unsigned char *buffer;
251 struct usbatm_data *usbatm = instance->usbatm;
252 struct usb_device *usb_dev = usbatm->usb_dev;
253 int actual_length;
254 int ret = 0;
255 int offset;
256
257 usb_dbg(usbatm, "%s entered\n", __func__);
258
259 if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
260 ret = -ENOMEM;
261 usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__);
262 goto out;
263 }
264
265 if (!usb_ifnum_to_if(usb_dev, 2)) {
266 ret = -ENODEV;
267 usb_dbg(usbatm, "%s: interface not found!\n", __func__);
268 goto out_free;
269 }
270
271 /* URB 7 */
272 if (dl_512_first) { /* some modems need a read before writing the firmware */
273 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
274 buffer, 0x200, &actual_length, 2000);
275
276 if (ret < 0 && ret != -ETIMEDOUT)
277 usb_warn(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret);
278 else
279 usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret);
280 }
281
282 /* URB 8 : both leds are static green */
283 for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
284 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
285 memcpy(buffer, fw1->data + offset, thislen);
286
287 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
288 buffer, thislen, &actual_length, DATA_TIMEOUT);
289
290 if (ret < 0) {
291 usb_err(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret);
292 goto out_free;
293 }
294 usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size);
295 }
296
297 /* USB led blinking green, ADSL led off */
298
299 /* URB 11 */
300 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
301 buffer, 0x200, &actual_length, DATA_TIMEOUT);
302
303 if (ret < 0) {
304 usb_err(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret);
305 goto out_free;
306 }
307 usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length);
308
309 /* URBs 12 to 139 - USB led blinking green, ADSL led off */
310 for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
311 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
312 memcpy(buffer, fw2->data + offset, thislen);
313
314 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
315 buffer, thislen, &actual_length, DATA_TIMEOUT);
316
317 if (ret < 0) {
318 usb_err(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret);
319 goto out_free;
320 }
321 }
322 usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size);
323
324 /* USB led static green, ADSL led static red */
325
326 /* URB 142 */
327 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
328 buffer, 0x200, &actual_length, DATA_TIMEOUT);
329
330 if (ret < 0) {
331 usb_err(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret);
332 goto out_free;
333 }
334
335 /* success */
336 usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length);
337
338 /* Delay to allow firmware to start up. We can do this here
339 because we're in our own kernel thread anyway. */
340 msleep_interruptible(1000);
341
342 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
343 usb_err(usbatm, "%s: setting interface to %d failed (%d)!\n", __func__, instance->params.altsetting, ret);
344 goto out_free;
345 }
346
347 /* Enable software buffering, if requested */
348 if (sw_buffering)
349 speedtch_set_swbuff(instance, 1);
350
351 /* Magic spell; don't ask us what this does */
352 speedtch_test_sequence(instance);
353
354 ret = 0;
355
356 out_free:
357 free_page((unsigned long)buffer);
358 out:
359 return ret;
360 }
361
362 static int speedtch_find_firmware(struct usbatm_data *usbatm, struct usb_interface *intf,
363 int phase, const struct firmware **fw_p)
364 {
365 struct device *dev = &intf->dev;
366 const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice);
367 const u8 major_revision = bcdDevice >> 8;
368 const u8 minor_revision = bcdDevice & 0xff;
369 char buf[24];
370
371 sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
372 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
373
374 if (request_firmware(fw_p, buf, dev)) {
375 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
376 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
377
378 if (request_firmware(fw_p, buf, dev)) {
379 sprintf(buf, "speedtch-%d.bin", phase);
380 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
381
382 if (request_firmware(fw_p, buf, dev)) {
383 usb_err(usbatm, "%s: no stage %d firmware found!\n", __func__, phase);
384 return -ENOENT;
385 }
386 }
387 }
388
389 usb_info(usbatm, "found stage %d firmware %s\n", phase, buf);
390
391 return 0;
392 }
393
394 static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf)
395 {
396 const struct firmware *fw1, *fw2;
397 struct speedtch_instance_data *instance = usbatm->driver_data;
398 int ret;
399
400 if ((ret = speedtch_find_firmware(usbatm, intf, 1, &fw1)) < 0)
401 return ret;
402
403 if ((ret = speedtch_find_firmware(usbatm, intf, 2, &fw2)) < 0) {
404 release_firmware(fw1);
405 return ret;
406 }
407
408 if ((ret = speedtch_upload_firmware(instance, fw1, fw2)) < 0)
409 usb_err(usbatm, "%s: firmware upload failed (%d)!\n", __func__, ret);
410
411 release_firmware(fw2);
412 release_firmware(fw1);
413
414 return ret;
415 }
416
417
418 /**********
419 ** ATM **
420 **********/
421
422 static int speedtch_read_status(struct speedtch_instance_data *instance)
423 {
424 struct usbatm_data *usbatm = instance->usbatm;
425 struct usb_device *usb_dev = usbatm->usb_dev;
426 unsigned char *buf = instance->scratch_buffer;
427 int ret;
428
429 memset(buf, 0, 16);
430
431 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
432 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
433 CTRL_TIMEOUT);
434 if (ret < 0) {
435 atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__);
436 return ret;
437 }
438
439 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
440 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
441 CTRL_TIMEOUT);
442 if (ret < 0) {
443 atm_dbg(usbatm, "%s: MSG B failed\n", __func__);
444 return ret;
445 }
446
447 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
448 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
449 CTRL_TIMEOUT);
450 if (ret < 0) {
451 atm_dbg(usbatm, "%s: MSG D failed\n", __func__);
452 return ret;
453 }
454
455 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
456 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
457 CTRL_TIMEOUT);
458 if (ret < 0) {
459 atm_dbg(usbatm, "%s: MSG E failed\n", __func__);
460 return ret;
461 }
462
463 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
464 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
465 CTRL_TIMEOUT);
466 if (ret < 0) {
467 atm_dbg(usbatm, "%s: MSG F failed\n", __func__);
468 return ret;
469 }
470
471 return 0;
472 }
473
474 static int speedtch_start_synchro(struct speedtch_instance_data *instance)
475 {
476 struct usbatm_data *usbatm = instance->usbatm;
477 struct usb_device *usb_dev = usbatm->usb_dev;
478 unsigned char *buf = instance->scratch_buffer;
479 int ret;
480
481 atm_dbg(usbatm, "%s entered\n", __func__);
482
483 memset(buf, 0, 2);
484
485 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
486 0x12, 0xc0, 0x04, 0x00,
487 buf, 2, CTRL_TIMEOUT);
488
489 if (ret < 0)
490 atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret);
491 else
492 atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n",
493 __func__, ret, buf[0], buf[1]);
494
495 return ret;
496 }
497
498 static void speedtch_check_status(struct work_struct *work)
499 {
500 struct speedtch_instance_data *instance =
501 container_of(work, struct speedtch_instance_data,
502 status_check_work);
503 struct usbatm_data *usbatm = instance->usbatm;
504 struct atm_dev *atm_dev = usbatm->atm_dev;
505 unsigned char *buf = instance->scratch_buffer;
506 int down_speed, up_speed, ret;
507 unsigned char status;
508
509 #ifdef VERBOSE_DEBUG
510 atm_dbg(usbatm, "%s entered\n", __func__);
511 #endif
512
513 ret = speedtch_read_status(instance);
514 if (ret < 0) {
515 atm_warn(usbatm, "error %d fetching device status\n", ret);
516 instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY);
517 return;
518 }
519
520 instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY);
521
522 status = buf[OFFSET_7];
523
524 if ((status != instance->last_status) || !status) {
525 atm_dbg(usbatm, "%s: line state 0x%02x\n", __func__, status);
526
527 switch (status) {
528 case 0:
529 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
530 if (instance->last_status)
531 atm_info(usbatm, "ADSL line is down\n");
532 /* It may never resync again unless we ask it to... */
533 ret = speedtch_start_synchro(instance);
534 break;
535
536 case 0x08:
537 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
538 atm_info(usbatm, "ADSL line is blocked?\n");
539 break;
540
541 case 0x10:
542 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
543 atm_info(usbatm, "ADSL line is synchronising\n");
544 break;
545
546 case 0x20:
547 down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
548 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
549 up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
550 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
551
552 if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) {
553 down_speed >>= 16;
554 up_speed >>= 16;
555 }
556
557 atm_dev->link_rate = down_speed * 1000 / 424;
558 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
559
560 atm_info(usbatm,
561 "ADSL line is up (%d kb/s down | %d kb/s up)\n",
562 down_speed, up_speed);
563 break;
564
565 default:
566 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
567 atm_info(usbatm, "unknown line state %02x\n", status);
568 break;
569 }
570
571 instance->last_status = status;
572 }
573 }
574
575 static void speedtch_status_poll(unsigned long data)
576 {
577 struct speedtch_instance_data *instance = (void *)data;
578
579 schedule_work(&instance->status_check_work);
580
581 /* The following check is racy, but the race is harmless */
582 if (instance->poll_delay < MAX_POLL_DELAY)
583 mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(instance->poll_delay));
584 else
585 atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n");
586 }
587
588 static void speedtch_resubmit_int(unsigned long data)
589 {
590 struct speedtch_instance_data *instance = (void *)data;
591 struct urb *int_urb = instance->int_urb;
592 int ret;
593
594 atm_dbg(instance->usbatm, "%s entered\n", __func__);
595
596 if (int_urb) {
597 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
598 if (!ret)
599 schedule_work(&instance->status_check_work);
600 else {
601 atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
602 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
603 }
604 }
605 }
606
607 static void speedtch_handle_int(struct urb *int_urb)
608 {
609 struct speedtch_instance_data *instance = int_urb->context;
610 struct usbatm_data *usbatm = instance->usbatm;
611 unsigned int count = int_urb->actual_length;
612 int status = int_urb->status;
613 int ret;
614
615 /* The magic interrupt for "up state" */
616 static const unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
617 /* The magic interrupt for "down state" */
618 static const unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
619
620 atm_dbg(usbatm, "%s entered\n", __func__);
621
622 if (status < 0) {
623 atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, status);
624 goto fail;
625 }
626
627 if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) {
628 del_timer(&instance->status_check_timer);
629 atm_info(usbatm, "DSL line goes up\n");
630 } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) {
631 atm_info(usbatm, "DSL line goes down\n");
632 } else {
633 int i;
634
635 atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count);
636 for (i = 0; i < count; i++)
637 printk(" %02x", instance->int_data[i]);
638 printk("\n");
639 goto fail;
640 }
641
642 if ((int_urb = instance->int_urb)) {
643 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
644 schedule_work(&instance->status_check_work);
645 if (ret < 0) {
646 atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
647 goto fail;
648 }
649 }
650
651 return;
652
653 fail:
654 if ((int_urb = instance->int_urb))
655 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
656 }
657
658 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
659 {
660 struct usb_device *usb_dev = usbatm->usb_dev;
661 struct speedtch_instance_data *instance = usbatm->driver_data;
662 int i, ret;
663 unsigned char mac_str[13];
664
665 atm_dbg(usbatm, "%s entered\n", __func__);
666
667 /* Set MAC address, it is stored in the serial number */
668 memset(atm_dev->esi, 0, sizeof(atm_dev->esi));
669 if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
670 for (i = 0; i < 6; i++)
671 atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) +
672 hex_to_bin(mac_str[i * 2 + 1]);
673 }
674
675 /* Start modem synchronisation */
676 ret = speedtch_start_synchro(instance);
677
678 /* Set up interrupt endpoint */
679 if (instance->int_urb) {
680 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
681 if (ret < 0) {
682 /* Doesn't matter; we'll poll anyway */
683 atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
684 usb_free_urb(instance->int_urb);
685 instance->int_urb = NULL;
686 }
687 }
688
689 /* Start status polling */
690 mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000));
691
692 return 0;
693 }
694
695 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
696 {
697 struct speedtch_instance_data *instance = usbatm->driver_data;
698 struct urb *int_urb = instance->int_urb;
699
700 atm_dbg(usbatm, "%s entered\n", __func__);
701
702 del_timer_sync(&instance->status_check_timer);
703
704 /*
705 * Since resubmit_timer and int_urb can schedule themselves and
706 * each other, shutting them down correctly takes some care
707 */
708 instance->int_urb = NULL; /* signal shutdown */
709 mb();
710 usb_kill_urb(int_urb);
711 del_timer_sync(&instance->resubmit_timer);
712 /*
713 * At this point, speedtch_handle_int and speedtch_resubmit_int
714 * can run or be running, but instance->int_urb == NULL means that
715 * they will not reschedule
716 */
717 usb_kill_urb(int_urb);
718 del_timer_sync(&instance->resubmit_timer);
719 usb_free_urb(int_urb);
720
721 flush_work_sync(&instance->status_check_work);
722 }
723
724 static int speedtch_pre_reset(struct usb_interface *intf)
725 {
726 return 0;
727 }
728
729 static int speedtch_post_reset(struct usb_interface *intf)
730 {
731 return 0;
732 }
733
734
735 /**********
736 ** USB **
737 **********/
738
739 static struct usb_device_id speedtch_usb_ids[] = {
740 {USB_DEVICE(0x06b9, 0x4061)},
741 {}
742 };
743
744 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
745
746 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
747
748 static struct usb_driver speedtch_usb_driver = {
749 .name = speedtch_driver_name,
750 .probe = speedtch_usb_probe,
751 .disconnect = usbatm_usb_disconnect,
752 .pre_reset = speedtch_pre_reset,
753 .post_reset = speedtch_post_reset,
754 .id_table = speedtch_usb_ids
755 };
756
757 static void speedtch_release_interfaces(struct usb_device *usb_dev,
758 int num_interfaces)
759 {
760 struct usb_interface *cur_intf;
761 int i;
762
763 for (i = 0; i < num_interfaces; i++)
764 if ((cur_intf = usb_ifnum_to_if(usb_dev, i))) {
765 usb_set_intfdata(cur_intf, NULL);
766 usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
767 }
768 }
769
770 static int speedtch_bind(struct usbatm_data *usbatm,
771 struct usb_interface *intf,
772 const struct usb_device_id *id)
773 {
774 struct usb_device *usb_dev = interface_to_usbdev(intf);
775 struct usb_interface *cur_intf, *data_intf;
776 struct speedtch_instance_data *instance;
777 int ifnum = intf->altsetting->desc.bInterfaceNumber;
778 int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
779 int i, ret;
780 int use_isoc;
781
782 usb_dbg(usbatm, "%s entered\n", __func__);
783
784 /* sanity checks */
785
786 if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
787 usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
788 return -ENODEV;
789 }
790
791 if (!(data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA))) {
792 usb_err(usbatm, "%s: data interface not found!\n", __func__);
793 return -ENODEV;
794 }
795
796 /* claim all interfaces */
797
798 for (i = 0; i < num_interfaces; i++) {
799 cur_intf = usb_ifnum_to_if(usb_dev, i);
800
801 if ((i != ifnum) && cur_intf) {
802 ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
803
804 if (ret < 0) {
805 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret);
806 speedtch_release_interfaces(usb_dev, i);
807 return ret;
808 }
809 }
810 }
811
812 instance = kzalloc(sizeof(*instance), GFP_KERNEL);
813
814 if (!instance) {
815 usb_err(usbatm, "%s: no memory for instance data!\n", __func__);
816 ret = -ENOMEM;
817 goto fail_release;
818 }
819
820 instance->usbatm = usbatm;
821
822 /* module parameters may change at any moment, so take a snapshot */
823 instance->params.altsetting = altsetting;
824 instance->params.BMaxDSL = BMaxDSL;
825 instance->params.ModemMode = ModemMode;
826 memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);
827 memcpy(instance->params.ModemOption, ModemOption, num_ModemOption);
828 use_isoc = enable_isoc;
829
830 if (instance->params.altsetting)
831 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
832 usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret);
833 instance->params.altsetting = 0; /* fall back to default */
834 }
835
836 if (!instance->params.altsetting && use_isoc)
837 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) {
838 usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret);
839 use_isoc = 0; /* fall back to bulk */
840 }
841
842 if (use_isoc) {
843 const struct usb_host_interface *desc = data_intf->cur_altsetting;
844 const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in;
845
846 use_isoc = 0; /* fall back to bulk if endpoint not found */
847
848 for (i = 0; i < desc->desc.bNumEndpoints; i++) {
849 const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc;
850
851 if ((endpoint_desc->bEndpointAddress == target_address)) {
852 use_isoc =
853 usb_endpoint_xfer_isoc(endpoint_desc);
854 break;
855 }
856 }
857
858 if (!use_isoc)
859 usb_info(usbatm, "isochronous transfer not supported - using bulk\n");
860 }
861
862 if (!use_isoc && !instance->params.altsetting)
863 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) {
864 usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret);
865 goto fail_free;
866 }
867
868 if (!instance->params.altsetting)
869 instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING;
870
871 usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
872
873 INIT_WORK(&instance->status_check_work, speedtch_check_status);
874 init_timer(&instance->status_check_timer);
875
876 instance->status_check_timer.function = speedtch_status_poll;
877 instance->status_check_timer.data = (unsigned long)instance;
878 instance->last_status = 0xff;
879 instance->poll_delay = MIN_POLL_DELAY;
880
881 init_timer(&instance->resubmit_timer);
882 instance->resubmit_timer.function = speedtch_resubmit_int;
883 instance->resubmit_timer.data = (unsigned long)instance;
884
885 instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
886
887 if (instance->int_urb)
888 usb_fill_int_urb(instance->int_urb, usb_dev,
889 usb_rcvintpipe(usb_dev, ENDPOINT_INT),
890 instance->int_data, sizeof(instance->int_data),
891 speedtch_handle_int, instance, 50);
892 else
893 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
894
895 /* check whether the modem already seems to be alive */
896 ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
897 0x12, 0xc0, 0x07, 0x00,
898 instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
899
900 usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0);
901
902 usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not");
903
904 if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT))
905 if ((ret = usb_reset_device(usb_dev)) < 0) {
906 usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret);
907 goto fail_free;
908 }
909
910 usbatm->driver_data = instance;
911
912 return 0;
913
914 fail_free:
915 usb_free_urb(instance->int_urb);
916 kfree(instance);
917 fail_release:
918 speedtch_release_interfaces(usb_dev, num_interfaces);
919 return ret;
920 }
921
922 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
923 {
924 struct usb_device *usb_dev = interface_to_usbdev(intf);
925 struct speedtch_instance_data *instance = usbatm->driver_data;
926
927 usb_dbg(usbatm, "%s entered\n", __func__);
928
929 speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
930 usb_free_urb(instance->int_urb);
931 kfree(instance);
932 }
933
934
935 /***********
936 ** init **
937 ***********/
938
939 static struct usbatm_driver speedtch_usbatm_driver = {
940 .driver_name = speedtch_driver_name,
941 .bind = speedtch_bind,
942 .heavy_init = speedtch_heavy_init,
943 .unbind = speedtch_unbind,
944 .atm_start = speedtch_atm_start,
945 .atm_stop = speedtch_atm_stop,
946 .bulk_in = ENDPOINT_BULK_DATA,
947 .bulk_out = ENDPOINT_BULK_DATA,
948 .isoc_in = ENDPOINT_ISOC_DATA
949 };
950
951 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
952 {
953 return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
954 }
955
956 static int __init speedtch_usb_init(void)
957 {
958 dbg("%s: driver version %s", __func__, DRIVER_VERSION);
959
960 return usb_register(&speedtch_usb_driver);
961 }
962
963 static void __exit speedtch_usb_cleanup(void)
964 {
965 dbg("%s", __func__);
966
967 usb_deregister(&speedtch_usb_driver);
968 }
969
970 module_init(speedtch_usb_init);
971 module_exit(speedtch_usb_cleanup);
972
973 MODULE_AUTHOR(DRIVER_AUTHOR);
974 MODULE_DESCRIPTION(DRIVER_DESC);
975 MODULE_LICENSE("GPL");
976 MODULE_VERSION(DRIVER_VERSION);
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