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);