Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

Linux/drivers/usb/atm/speedtch.c

  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/kernel.h>
 31 #include <linux/module.h>
 32 #include <linux/moduleparam.h>
 33 #include <linux/slab.h>
 34 #include <linux/stat.h>
 35 #include <linux/timer.h>
 36 #include <linux/types.h>
 37 #include <linux/usb/ch9.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  "1.10"
 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 
 57 #define SIZE_7          1
 58 #define SIZE_b          8
 59 #define SIZE_d          4
 60 #define SIZE_e          1
 61 #define SIZE_f          1
 62 
 63 #define MIN_POLL_DELAY          5000    /* milliseconds */
 64 #define MAX_POLL_DELAY          60000   /* milliseconds */
 65 
 66 #define RESUBMIT_DELAY          1000    /* milliseconds */
 67 
 68 #define DEFAULT_BULK_ALTSETTING 1
 69 #define DEFAULT_ISOC_ALTSETTING 3
 70 #define DEFAULT_DL_512_FIRST    0
 71 #define DEFAULT_ENABLE_ISOC     0
 72 #define DEFAULT_SW_BUFFERING    0
 73 
 74 static unsigned int altsetting = 0; /* zero means: use the default */
 75 static bool dl_512_first = DEFAULT_DL_512_FIRST;
 76 static bool enable_isoc = DEFAULT_ENABLE_ISOC;
 77 static bool sw_buffering = DEFAULT_SW_BUFFERING;
 78 
 79 #define DEFAULT_B_MAX_DSL       8128
 80 #define DEFAULT_MODEM_MODE      11
 81 #define MODEM_OPTION_LENGTH     16
 82 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
 83         0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 84 };
 85 
 86 static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL;
 87 static unsigned char ModemMode = DEFAULT_MODEM_MODE;
 88 static unsigned char ModemOption[MODEM_OPTION_LENGTH];
 89 static unsigned int num_ModemOption;
 90 
 91 module_param(altsetting, uint, S_IRUGO | S_IWUSR);
 92 MODULE_PARM_DESC(altsetting,
 93                 "Alternative setting for data interface (bulk_default: "
 94                 __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: "
 95                 __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")");
 96 
 97 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
 98 MODULE_PARM_DESC(dl_512_first,
 99                  "Read 512 bytes before sending firmware (default: "
100                  __MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
101 
102 module_param(enable_isoc, bool, S_IRUGO | S_IWUSR);
103 MODULE_PARM_DESC(enable_isoc,
104                 "Use isochronous transfers if available (default: "
105                 __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")");
106 
107 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
108 MODULE_PARM_DESC(sw_buffering,
109                  "Enable software buffering (default: "
110                  __MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
111 
112 module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR);
113 MODULE_PARM_DESC(BMaxDSL,
114                 "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL));
115 
116 module_param(ModemMode, byte, S_IRUGO | S_IWUSR);
117 MODULE_PARM_DESC(ModemMode,
118                 "default: " __MODULE_STRING(DEFAULT_MODEM_MODE));
119 
120 module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO);
121 MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20");
122 
123 #define INTERFACE_DATA          1
124 #define ENDPOINT_INT            0x81
125 #define ENDPOINT_BULK_DATA      0x07
126 #define ENDPOINT_ISOC_DATA      0x07
127 #define ENDPOINT_FIRMWARE       0x05
128 
129 struct speedtch_params {
130         unsigned int altsetting;
131         unsigned int BMaxDSL;
132         unsigned char ModemMode;
133         unsigned char ModemOption[MODEM_OPTION_LENGTH];
134 };
135 
136 struct speedtch_instance_data {
137         struct usbatm_data *usbatm;
138 
139         struct speedtch_params params; /* set in probe, constant afterwards */
140 
141         struct timer_list status_check_timer;
142         struct work_struct status_check_work;
143 
144         unsigned char last_status;
145 
146         int poll_delay; /* milliseconds */
147 
148         struct timer_list resubmit_timer;
149         struct urb *int_urb;
150         unsigned char int_data[16];
151 
152         unsigned char scratch_buffer[16];
153 };
154 
155 /***************
156 **  firmware  **
157 ***************/
158 
159 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state)
160 {
161         struct usbatm_data *usbatm = instance->usbatm;
162         struct usb_device *usb_dev = usbatm->usb_dev;
163         int ret;
164 
165         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
166                               0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT);
167         if (ret < 0)
168                 usb_warn(usbatm,
169                          "%sabling SW buffering: usb_control_msg returned %d\n",
170                          state ? "En" : "Dis", ret);
171         else
172                 usb_dbg(usbatm, "speedtch_set_swbuff: %sbled SW buffering\n", state ? "En" : "Dis");
173 }
174 
175 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
176 {
177         struct usbatm_data *usbatm = instance->usbatm;
178         struct usb_device *usb_dev = usbatm->usb_dev;
179         unsigned char *buf = instance->scratch_buffer;
180         int ret;
181 
182         /* URB 147 */
183         buf[0] = 0x1c;
184         buf[1] = 0x50;
185         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
186                               0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT);
187         if (ret < 0)
188                 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret);
189 
190         /* URB 148 */
191         buf[0] = 0x32;
192         buf[1] = 0x00;
193         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
194                               0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT);
195         if (ret < 0)
196                 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret);
197 
198         /* URB 149 */
199         buf[0] = 0x01;
200         buf[1] = 0x00;
201         buf[2] = 0x01;
202         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
203                               0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT);
204         if (ret < 0)
205                 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret);
206 
207         /* URB 150 */
208         buf[0] = 0x01;
209         buf[1] = 0x00;
210         buf[2] = 0x01;
211         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
212                               0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT);
213         if (ret < 0)
214                 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret);
215 
216         /* Extra initialisation in recent drivers - gives higher speeds */
217 
218         /* URBext1 */
219         buf[0] = instance->params.ModemMode;
220         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
221                               0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT);
222         if (ret < 0)
223                 usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret);
224 
225         /* URBext2 */
226         /* This seems to be the one which actually triggers the higher sync
227            rate -- it does require the new firmware too, although it works OK
228            with older firmware */
229         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
230                               0x01, 0x40, 0x14, 0x00,
231                               instance->params.ModemOption,
232                               MODEM_OPTION_LENGTH, CTRL_TIMEOUT);
233         if (ret < 0)
234                 usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret);
235 
236         /* URBext3 */
237         buf[0] = instance->params.BMaxDSL & 0xff;
238         buf[1] = instance->params.BMaxDSL >> 8;
239         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
240                               0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT);
241         if (ret < 0)
242                 usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret);
243 }
244 
245 static int speedtch_upload_firmware(struct speedtch_instance_data *instance,
246                                      const struct firmware *fw1,
247                                      const struct firmware *fw2)
248 {
249         unsigned char *buffer;
250         struct usbatm_data *usbatm = instance->usbatm;
251         struct usb_device *usb_dev = usbatm->usb_dev;
252         int actual_length;
253         int ret = 0;
254         int offset;
255 
256         usb_dbg(usbatm, "%s entered\n", __func__);
257 
258         buffer = (unsigned char *)__get_free_page(GFP_KERNEL);
259         if (!buffer) {
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         int_urb = instance->int_urb;
643         if (int_urb) {
644                 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
645                 schedule_work(&instance->status_check_work);
646                 if (ret < 0) {
647                         atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
648                         goto fail;
649                 }
650         }
651 
652         return;
653 
654 fail:
655         int_urb = instance->int_urb;
656         if (int_urb)
657                 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
658 }
659 
660 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
661 {
662         struct usb_device *usb_dev = usbatm->usb_dev;
663         struct speedtch_instance_data *instance = usbatm->driver_data;
664         int i, ret;
665         unsigned char mac_str[13];
666 
667         atm_dbg(usbatm, "%s entered\n", __func__);
668 
669         /* Set MAC address, it is stored in the serial number */
670         memset(atm_dev->esi, 0, sizeof(atm_dev->esi));
671         if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
672                 for (i = 0; i < 6; i++)
673                         atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) +
674                                 hex_to_bin(mac_str[i * 2 + 1]);
675         }
676 
677         /* Start modem synchronisation */
678         ret = speedtch_start_synchro(instance);
679 
680         /* Set up interrupt endpoint */
681         if (instance->int_urb) {
682                 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
683                 if (ret < 0) {
684                         /* Doesn't matter; we'll poll anyway */
685                         atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
686                         usb_free_urb(instance->int_urb);
687                         instance->int_urb = NULL;
688                 }
689         }
690 
691         /* Start status polling */
692         mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000));
693 
694         return 0;
695 }
696 
697 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
698 {
699         struct speedtch_instance_data *instance = usbatm->driver_data;
700         struct urb *int_urb = instance->int_urb;
701 
702         atm_dbg(usbatm, "%s entered\n", __func__);
703 
704         del_timer_sync(&instance->status_check_timer);
705 
706         /*
707          * Since resubmit_timer and int_urb can schedule themselves and
708          * each other, shutting them down correctly takes some care
709          */
710         instance->int_urb = NULL; /* signal shutdown */
711         mb();
712         usb_kill_urb(int_urb);
713         del_timer_sync(&instance->resubmit_timer);
714         /*
715          * At this point, speedtch_handle_int and speedtch_resubmit_int
716          * can run or be running, but instance->int_urb == NULL means that
717          * they will not reschedule
718          */
719         usb_kill_urb(int_urb);
720         del_timer_sync(&instance->resubmit_timer);
721         usb_free_urb(int_urb);
722 
723         flush_work(&instance->status_check_work);
724 }
725 
726 static int speedtch_pre_reset(struct usb_interface *intf)
727 {
728         return 0;
729 }
730 
731 static int speedtch_post_reset(struct usb_interface *intf)
732 {
733         return 0;
734 }
735 
736 
737 /**********
738 **  USB  **
739 **********/
740 
741 static struct usb_device_id speedtch_usb_ids[] = {
742         {USB_DEVICE(0x06b9, 0x4061)},
743         {}
744 };
745 
746 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
747 
748 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
749 
750 static struct usb_driver speedtch_usb_driver = {
751         .name           = speedtch_driver_name,
752         .probe          = speedtch_usb_probe,
753         .disconnect     = usbatm_usb_disconnect,
754         .pre_reset      = speedtch_pre_reset,
755         .post_reset     = speedtch_post_reset,
756         .id_table       = speedtch_usb_ids
757 };
758 
759 static void speedtch_release_interfaces(struct usb_device *usb_dev,
760                                         int num_interfaces)
761 {
762         struct usb_interface *cur_intf;
763         int i;
764 
765         for (i = 0; i < num_interfaces; i++) {
766                 cur_intf = usb_ifnum_to_if(usb_dev, i);
767                 if (cur_intf) {
768                         usb_set_intfdata(cur_intf, NULL);
769                         usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
770                 }
771         }
772 }
773 
774 static int speedtch_bind(struct usbatm_data *usbatm,
775                          struct usb_interface *intf,
776                          const struct usb_device_id *id)
777 {
778         struct usb_device *usb_dev = interface_to_usbdev(intf);
779         struct usb_interface *cur_intf, *data_intf;
780         struct speedtch_instance_data *instance;
781         int ifnum = intf->altsetting->desc.bInterfaceNumber;
782         int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
783         int i, ret;
784         int use_isoc;
785 
786         usb_dbg(usbatm, "%s entered\n", __func__);
787 
788         /* sanity checks */
789 
790         if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
791                 usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
792                 return -ENODEV;
793         }
794 
795         data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA);
796         if (!data_intf) {
797                 usb_err(usbatm, "%s: data interface not found!\n", __func__);
798                 return -ENODEV;
799         }
800 
801         /* claim all interfaces */
802 
803         for (i = 0; i < num_interfaces; i++) {
804                 cur_intf = usb_ifnum_to_if(usb_dev, i);
805 
806                 if ((i != ifnum) && cur_intf) {
807                         ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
808 
809                         if (ret < 0) {
810                                 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret);
811                                 speedtch_release_interfaces(usb_dev, i);
812                                 return ret;
813                         }
814                 }
815         }
816 
817         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
818 
819         if (!instance) {
820                 usb_err(usbatm, "%s: no memory for instance data!\n", __func__);
821                 ret = -ENOMEM;
822                 goto fail_release;
823         }
824 
825         instance->usbatm = usbatm;
826 
827         /* module parameters may change at any moment, so take a snapshot */
828         instance->params.altsetting = altsetting;
829         instance->params.BMaxDSL = BMaxDSL;
830         instance->params.ModemMode = ModemMode;
831         memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);
832         memcpy(instance->params.ModemOption, ModemOption, num_ModemOption);
833         use_isoc = enable_isoc;
834 
835         if (instance->params.altsetting)
836                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
837                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret);
838                         instance->params.altsetting = 0; /* fall back to default */
839                 }
840 
841         if (!instance->params.altsetting && use_isoc)
842                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) {
843                         usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret);
844                         use_isoc = 0; /* fall back to bulk */
845                 }
846 
847         if (use_isoc) {
848                 const struct usb_host_interface *desc = data_intf->cur_altsetting;
849                 const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in;
850 
851                 use_isoc = 0; /* fall back to bulk if endpoint not found */
852 
853                 for (i = 0; i < desc->desc.bNumEndpoints; i++) {
854                         const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc;
855 
856                         if ((endpoint_desc->bEndpointAddress == target_address)) {
857                                 use_isoc =
858                                         usb_endpoint_xfer_isoc(endpoint_desc);
859                                 break;
860                         }
861                 }
862 
863                 if (!use_isoc)
864                         usb_info(usbatm, "isochronous transfer not supported - using bulk\n");
865         }
866 
867         if (!use_isoc && !instance->params.altsetting)
868                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) {
869                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret);
870                         goto fail_free;
871                 }
872 
873         if (!instance->params.altsetting)
874                 instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING;
875 
876         usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
877 
878         INIT_WORK(&instance->status_check_work, speedtch_check_status);
879         init_timer(&instance->status_check_timer);
880 
881         instance->status_check_timer.function = speedtch_status_poll;
882         instance->status_check_timer.data = (unsigned long)instance;
883         instance->last_status = 0xff;
884         instance->poll_delay = MIN_POLL_DELAY;
885 
886         init_timer(&instance->resubmit_timer);
887         instance->resubmit_timer.function = speedtch_resubmit_int;
888         instance->resubmit_timer.data = (unsigned long)instance;
889 
890         instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
891 
892         if (instance->int_urb)
893                 usb_fill_int_urb(instance->int_urb, usb_dev,
894                                  usb_rcvintpipe(usb_dev, ENDPOINT_INT),
895                                  instance->int_data, sizeof(instance->int_data),
896                                  speedtch_handle_int, instance, 16);
897         else
898                 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
899 
900         /* check whether the modem already seems to be alive */
901         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
902                               0x12, 0xc0, 0x07, 0x00,
903                               instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
904 
905         usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0);
906 
907         usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not");
908 
909         if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT))
910                 if ((ret = usb_reset_device(usb_dev)) < 0) {
911                         usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret);
912                         goto fail_free;
913                 }
914 
915         usbatm->driver_data = instance;
916 
917         return 0;
918 
919 fail_free:
920         usb_free_urb(instance->int_urb);
921         kfree(instance);
922 fail_release:
923         speedtch_release_interfaces(usb_dev, num_interfaces);
924         return ret;
925 }
926 
927 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
928 {
929         struct usb_device *usb_dev = interface_to_usbdev(intf);
930         struct speedtch_instance_data *instance = usbatm->driver_data;
931 
932         usb_dbg(usbatm, "%s entered\n", __func__);
933 
934         speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
935         usb_free_urb(instance->int_urb);
936         kfree(instance);
937 }
938 
939 
940 /***********
941 **  init  **
942 ***********/
943 
944 static struct usbatm_driver speedtch_usbatm_driver = {
945         .driver_name    = speedtch_driver_name,
946         .bind           = speedtch_bind,
947         .heavy_init     = speedtch_heavy_init,
948         .unbind         = speedtch_unbind,
949         .atm_start      = speedtch_atm_start,
950         .atm_stop       = speedtch_atm_stop,
951         .bulk_in        = ENDPOINT_BULK_DATA,
952         .bulk_out       = ENDPOINT_BULK_DATA,
953         .isoc_in        = ENDPOINT_ISOC_DATA
954 };
955 
956 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
957 {
958         return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
959 }
960 
961 module_usb_driver(speedtch_usb_driver);
962 
963 MODULE_AUTHOR(DRIVER_AUTHOR);
964 MODULE_DESCRIPTION(DRIVER_DESC);
965 MODULE_LICENSE("GPL");
966 MODULE_VERSION(DRIVER_VERSION);
967 

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