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_DESC     "Alcatel SpeedTouch USB driver"
  44
  45 static const char speedtch_driver_name[] = "speedtch";
  46
  47 #define CTRL_TIMEOUT 2000       /* milliseconds */
  48 #define DATA_TIMEOUT 2000       /* milliseconds */
  49
  50 #define OFFSET_7        0               /* size 1 */
  51 #define OFFSET_b        1               /* size 8 */
  52 #define OFFSET_d        9               /* size 4 */
  53 #define OFFSET_e        13              /* size 1 */
  54 #define OFFSET_f        14              /* size 1 */
  55
  56 #define SIZE_7          1
  57 #define SIZE_b          8
  58 #define SIZE_d          4
  59 #define SIZE_e          1
  60 #define SIZE_f          1
  61
  62 #define MIN_POLL_DELAY          5000    /* milliseconds */
  63 #define MAX_POLL_DELAY          60000   /* milliseconds */
  64
  65 #define RESUBMIT_DELAY          1000    /* milliseconds */
  66
  67 #define DEFAULT_BULK_ALTSETTING 1
  68 #define DEFAULT_ISOC_ALTSETTING 3
  69 #define DEFAULT_DL_512_FIRST    0
  70 #define DEFAULT_ENABLE_ISOC     0
  71 #define DEFAULT_SW_BUFFERING    0
  72
  73 static unsigned int altsetting = 0; /* zero means: use the default */
  74 static bool dl_512_first = DEFAULT_DL_512_FIRST;
  75 static bool enable_isoc = DEFAULT_ENABLE_ISOC;
  76 static bool sw_buffering = DEFAULT_SW_BUFFERING;
  77
  78 #define DEFAULT_B_MAX_DSL       8128
  79 #define DEFAULT_MODEM_MODE      11
  80 #define MODEM_OPTION_LENGTH     16
  81 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
  82         0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  83 };
  84
  85 static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL;
  86 static unsigned char ModemMode = DEFAULT_MODEM_MODE;
  87 static unsigned char ModemOption[MODEM_OPTION_LENGTH];
  88 static unsigned int num_ModemOption;
  89
  90 module_param(altsetting, uint, S_IRUGO | S_IWUSR);
  91 MODULE_PARM_DESC(altsetting,
  92                 "Alternative setting for data interface (bulk_default: "
  93                 __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: "
  94                 __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")");
  95
  96 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
  97 MODULE_PARM_DESC(dl_512_first,
  98                  "Read 512 bytes before sending firmware (default: "
  99                  __MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
 100
 101 module_param(enable_isoc, bool, S_IRUGO | S_IWUSR);
 102 MODULE_PARM_DESC(enable_isoc,
 103                 "Use isochronous transfers if available (default: "
 104                 __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")");
 105
 106 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
 107 MODULE_PARM_DESC(sw_buffering,
 108                  "Enable software buffering (default: "
 109                  __MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
 110
 111 module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR);
 112 MODULE_PARM_DESC(BMaxDSL,
 113                 "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL));
 114
 115 module_param(ModemMode, byte, S_IRUGO | S_IWUSR);
 116 MODULE_PARM_DESC(ModemMode,
 117                 "default: " __MODULE_STRING(DEFAULT_MODEM_MODE));
 118
 119 module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO);
 120 MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20");
 121
 122 #define INTERFACE_DATA          1
 123 #define ENDPOINT_INT            0x81
 124 #define ENDPOINT_BULK_DATA      0x07
 125 #define ENDPOINT_ISOC_DATA      0x07
 126 #define ENDPOINT_FIRMWARE       0x05
 127
 128 struct speedtch_params {
 129         unsigned int altsetting;
 130         unsigned int BMaxDSL;
 131         unsigned char ModemMode;
 132         unsigned char ModemOption[MODEM_OPTION_LENGTH];
 133 };
 134
 135 struct speedtch_instance_data {
 136         struct usbatm_data *usbatm;
 137
 138         struct speedtch_params params; /* set in probe, constant afterwards */
 139
 140         struct timer_list status_check_timer;
 141         struct work_struct status_check_work;
 142
 143         unsigned char last_status;
 144
 145         int poll_delay; /* milliseconds */
 146
 147         struct timer_list resubmit_timer;
 148         struct urb *int_urb;
 149         unsigned char int_data[16];
 150
 151         unsigned char scratch_buffer[16];
 152 };
 153
 154 /***************
 155 **  firmware  **
 156 ***************/
 157
 158 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state)
 159 {
 160         struct usbatm_data *usbatm = instance->usbatm;
 161         struct usb_device *usb_dev = usbatm->usb_dev;
 162         int ret;
 163
 164         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 165                               0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT);
 166         if (ret < 0)
 167                 usb_warn(usbatm,
 168                          "%sabling SW buffering: usb_control_msg returned %d\n",
 169                          state ? "En" : "Dis", ret);
 170         else
 171                 usb_dbg(usbatm, "speedtch_set_swbuff: %sbled SW buffering\n", state ? "En" : "Dis");
 172 }
 173
 174 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
 175 {
 176         struct usbatm_data *usbatm = instance->usbatm;
 177         struct usb_device *usb_dev = usbatm->usb_dev;
 178         unsigned char *buf = instance->scratch_buffer;
 179         int ret;
 180
 181         /* URB 147 */
 182         buf[0] = 0x1c;
 183         buf[1] = 0x50;
 184         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 185                               0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT);
 186         if (ret < 0)
 187                 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret);
 188
 189         /* URB 148 */
 190         buf[0] = 0x32;
 191         buf[1] = 0x00;
 192         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 193                               0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT);
 194         if (ret < 0)
 195                 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret);
 196
 197         /* URB 149 */
 198         buf[0] = 0x01;
 199         buf[1] = 0x00;
 200         buf[2] = 0x01;
 201         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 202                               0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT);
 203         if (ret < 0)
 204                 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret);
 205
 206         /* URB 150 */
 207         buf[0] = 0x01;
 208         buf[1] = 0x00;
 209         buf[2] = 0x01;
 210         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 211                               0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT);
 212         if (ret < 0)
 213                 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret);
 214
 215         /* Extra initialisation in recent drivers - gives higher speeds */
 216
 217         /* URBext1 */
 218         buf[0] = instance->params.ModemMode;
 219         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 220                               0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT);
 221         if (ret < 0)
 222                 usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret);
 223
 224         /* URBext2 */
 225         /* This seems to be the one which actually triggers the higher sync
 226            rate -- it does require the new firmware too, although it works OK
 227            with older firmware */
 228         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 229                               0x01, 0x40, 0x14, 0x00,
 230                               instance->params.ModemOption,
 231                               MODEM_OPTION_LENGTH, CTRL_TIMEOUT);
 232         if (ret < 0)
 233                 usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret);
 234
 235         /* URBext3 */
 236         buf[0] = instance->params.BMaxDSL & 0xff;
 237         buf[1] = instance->params.BMaxDSL >> 8;
 238         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 239                               0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT);
 240         if (ret < 0)
 241                 usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret);
 242 }
 243
 244 static int speedtch_upload_firmware(struct speedtch_instance_data *instance,
 245                                      const struct firmware *fw1,
 246                                      const struct firmware *fw2)
 247 {
 248         unsigned char *buffer;
 249         struct usbatm_data *usbatm = instance->usbatm;
 250         struct usb_device *usb_dev = usbatm->usb_dev;
 251         int actual_length;
 252         int ret = 0;
 253         int offset;
 254
 255         usb_dbg(usbatm, "%s entered\n", __func__);
 256
 257         buffer = (unsigned char *)__get_free_page(GFP_KERNEL);
 258         if (!buffer) {
 259                 ret = -ENOMEM;
 260                 usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__);
 261                 goto out;
 262         }
 263
 264         if (!usb_ifnum_to_if(usb_dev, 2)) {
 265                 ret = -ENODEV;
 266                 usb_dbg(usbatm, "%s: interface not found!\n", __func__);
 267                 goto out_free;
 268         }
 269
 270         /* URB 7 */
 271         if (dl_512_first) {     /* some modems need a read before writing the firmware */
 272                 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 273                                    buffer, 0x200, &actual_length, 2000);
 274
 275                 if (ret < 0 && ret != -ETIMEDOUT)
 276                         usb_warn(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret);
 277                 else
 278                         usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret);
 279         }
 280
 281         /* URB 8 : both leds are static green */
 282         for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
 283                 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
 284                 memcpy(buffer, fw1->data + offset, thislen);
 285
 286                 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 287                                    buffer, thislen, &actual_length, DATA_TIMEOUT);
 288
 289                 if (ret < 0) {
 290                         usb_err(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret);
 291                         goto out_free;
 292                 }
 293                 usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size);
 294         }
 295
 296         /* USB led blinking green, ADSL led off */
 297
 298         /* URB 11 */
 299         ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 300                            buffer, 0x200, &actual_length, DATA_TIMEOUT);
 301
 302         if (ret < 0) {
 303                 usb_err(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret);
 304                 goto out_free;
 305         }
 306         usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length);
 307
 308         /* URBs 12 to 139 - USB led blinking green, ADSL led off */
 309         for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
 310                 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
 311                 memcpy(buffer, fw2->data + offset, thislen);
 312
 313                 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 314                                    buffer, thislen, &actual_length, DATA_TIMEOUT);
 315
 316                 if (ret < 0) {
 317                         usb_err(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret);
 318                         goto out_free;
 319                 }
 320         }
 321         usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size);
 322
 323         /* USB led static green, ADSL led static red */
 324
 325         /* URB 142 */
 326         ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 327                            buffer, 0x200, &actual_length, DATA_TIMEOUT);
 328
 329         if (ret < 0) {
 330                 usb_err(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret);
 331                 goto out_free;
 332         }
 333
 334         /* success */
 335         usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length);
 336
 337         /* Delay to allow firmware to start up. We can do this here
 338            because we're in our own kernel thread anyway. */
 339         msleep_interruptible(1000);
 340
 341         if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
 342                 usb_err(usbatm, "%s: setting interface to %d failed (%d)!\n", __func__, instance->params.altsetting, ret);
 343                 goto out_free;
 344         }
 345
 346         /* Enable software buffering, if requested */
 347         if (sw_buffering)
 348                 speedtch_set_swbuff(instance, 1);
 349
 350         /* Magic spell; don't ask us what this does */
 351         speedtch_test_sequence(instance);
 352
 353         ret = 0;
 354
 355 out_free:
 356         free_page((unsigned long)buffer);
 357 out:
 358         return ret;
 359 }
 360
 361 static int speedtch_find_firmware(struct usbatm_data *usbatm, struct usb_interface *intf,
 362                                   int phase, const struct firmware **fw_p)
 363 {
 364         struct device *dev = &intf->dev;
 365         const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice);
 366         const u8 major_revision = bcdDevice >> 8;
 367         const u8 minor_revision = bcdDevice & 0xff;
 368         char buf[24];
 369
 370         sprintf(buf, "/*(DEBLOBBED)*/", phase, major_revision, minor_revision);
 371         usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 372
 373         if (reject_firmware(fw_p, buf, dev)) {
 374                 sprintf(buf, "/*(DEBLOBBED)*/", phase, major_revision);
 375                 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 376
 377                 if (reject_firmware(fw_p, buf, dev)) {
 378                         sprintf(buf, "/*(DEBLOBBED)*/", phase);
 379                         usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 380
 381                         if (reject_firmware(fw_p, buf, dev)) {
 382                                 usb_err(usbatm, "%s: no stage %d firmware found!\n", __func__, phase);
 383                                 return -ENOENT;
 384                         }
 385                 }
 386         }
 387
 388         usb_info(usbatm, "found stage %d firmware %s\n", phase, buf);
 389
 390         return 0;
 391 }
 392
 393 static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf)
 394 {
 395         const struct firmware *fw1, *fw2;
 396         struct speedtch_instance_data *instance = usbatm->driver_data;
 397         int ret;
 398
 399         if ((ret = speedtch_find_firmware(usbatm, intf, 1, &fw1)) < 0)
 400                 return ret;
 401
 402         if ((ret = speedtch_find_firmware(usbatm, intf, 2, &fw2)) < 0) {
 403                 release_firmware(fw1);
 404                 return ret;
 405         }
 406
 407         if ((ret = speedtch_upload_firmware(instance, fw1, fw2)) < 0)
 408                 usb_err(usbatm, "%s: firmware upload failed (%d)!\n", __func__, ret);
 409
 410         release_firmware(fw2);
 411         release_firmware(fw1);
 412
 413         return ret;
 414 }
 415
 416
 417 /**********
 418 **  ATM  **
 419 **********/
 420
 421 static int speedtch_read_status(struct speedtch_instance_data *instance)
 422 {
 423         struct usbatm_data *usbatm = instance->usbatm;
 424         struct usb_device *usb_dev = usbatm->usb_dev;
 425         unsigned char *buf = instance->scratch_buffer;
 426         int ret;
 427
 428         memset(buf, 0, 16);
 429
 430         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 431                               0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
 432                               CTRL_TIMEOUT);
 433         if (ret < 0) {
 434                 atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__);
 435                 return ret;
 436         }
 437
 438         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 439                               0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
 440                               CTRL_TIMEOUT);
 441         if (ret < 0) {
 442                 atm_dbg(usbatm, "%s: MSG B failed\n", __func__);
 443                 return ret;
 444         }
 445
 446         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 447                               0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
 448                               CTRL_TIMEOUT);
 449         if (ret < 0) {
 450                 atm_dbg(usbatm, "%s: MSG D failed\n", __func__);
 451                 return ret;
 452         }
 453
 454         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 455                               0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
 456                               CTRL_TIMEOUT);
 457         if (ret < 0) {
 458                 atm_dbg(usbatm, "%s: MSG E failed\n", __func__);
 459                 return ret;
 460         }
 461
 462         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 463                               0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
 464                               CTRL_TIMEOUT);
 465         if (ret < 0) {
 466                 atm_dbg(usbatm, "%s: MSG F failed\n", __func__);
 467                 return ret;
 468         }
 469
 470         return 0;
 471 }
 472
 473 static int speedtch_start_synchro(struct speedtch_instance_data *instance)
 474 {
 475         struct usbatm_data *usbatm = instance->usbatm;
 476         struct usb_device *usb_dev = usbatm->usb_dev;
 477         unsigned char *buf = instance->scratch_buffer;
 478         int ret;
 479
 480         atm_dbg(usbatm, "%s entered\n", __func__);
 481
 482         memset(buf, 0, 2);
 483
 484         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 485                               0x12, 0xc0, 0x04, 0x00,
 486                               buf, 2, CTRL_TIMEOUT);
 487
 488         if (ret < 0)
 489                 atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret);
 490         else
 491                 atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n",
 492                         __func__, ret, buf[0], buf[1]);
 493
 494         return ret;
 495 }
 496
 497 static void speedtch_check_status(struct work_struct *work)
 498 {
 499         struct speedtch_instance_data *instance =
 500                 container_of(work, struct speedtch_instance_data,
 501                              status_check_work);
 502         struct usbatm_data *usbatm = instance->usbatm;
 503         struct atm_dev *atm_dev = usbatm->atm_dev;
 504         unsigned char *buf = instance->scratch_buffer;
 505         int down_speed, up_speed, ret;
 506         unsigned char status;
 507
 508 #ifdef VERBOSE_DEBUG
 509         atm_dbg(usbatm, "%s entered\n", __func__);
 510 #endif
 511
 512         ret = speedtch_read_status(instance);
 513         if (ret < 0) {
 514                 atm_warn(usbatm, "error %d fetching device status\n", ret);
 515                 instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY);
 516                 return;
 517         }
 518
 519         instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY);
 520
 521         status = buf[OFFSET_7];
 522
 523         if ((status != instance->last_status) || !status) {
 524                 atm_dbg(usbatm, "%s: line state 0x%02x\n", __func__, status);
 525
 526                 switch (status) {
 527                 case 0:
 528                         atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 529                         if (instance->last_status)
 530                                 atm_info(usbatm, "ADSL line is down\n");
 531                         /* It may never resync again unless we ask it to... */
 532                         ret = speedtch_start_synchro(instance);
 533                         break;
 534
 535                 case 0x08:
 536                         atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
 537                         atm_info(usbatm, "ADSL line is blocked?\n");
 538                         break;
 539
 540                 case 0x10:
 541                         atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 542                         atm_info(usbatm, "ADSL line is synchronising\n");
 543                         break;
 544
 545                 case 0x20:
 546                         down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
 547                                 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
 548                         up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
 549                                 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
 550
 551                         if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) {
 552                                 down_speed >>= 16;
 553                                 up_speed >>= 16;
 554                         }
 555
 556                         atm_dev->link_rate = down_speed * 1000 / 424;
 557                         atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
 558
 559                         atm_info(usbatm,
 560                                  "ADSL line is up (%d kb/s down | %d kb/s up)\n",
 561                                  down_speed, up_speed);
 562                         break;
 563
 564                 default:
 565                         atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
 566                         atm_info(usbatm, "unknown line state %02x\n", status);
 567                         break;
 568                 }
 569
 570                 instance->last_status = status;
 571         }
 572 }
 573
 574 static void speedtch_status_poll(unsigned long data)
 575 {
 576         struct speedtch_instance_data *instance = (void *)data;
 577
 578         schedule_work(&instance->status_check_work);
 579
 580         /* The following check is racy, but the race is harmless */
 581         if (instance->poll_delay < MAX_POLL_DELAY)
 582                 mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(instance->poll_delay));
 583         else
 584                 atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n");
 585 }
 586
 587 static void speedtch_resubmit_int(unsigned long data)
 588 {
 589         struct speedtch_instance_data *instance = (void *)data;
 590         struct urb *int_urb = instance->int_urb;
 591         int ret;
 592
 593         atm_dbg(instance->usbatm, "%s entered\n", __func__);
 594
 595         if (int_urb) {
 596                 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
 597                 if (!ret)
 598                         schedule_work(&instance->status_check_work);
 599                 else {
 600                         atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
 601                         mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
 602                 }
 603         }
 604 }
 605
 606 static void speedtch_handle_int(struct urb *int_urb)
 607 {
 608         struct speedtch_instance_data *instance = int_urb->context;
 609         struct usbatm_data *usbatm = instance->usbatm;
 610         unsigned int count = int_urb->actual_length;
 611         int status = int_urb->status;
 612         int ret;
 613
 614         /* The magic interrupt for "up state" */
 615         static const unsigned char up_int[6]   = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
 616         /* The magic interrupt for "down state" */
 617         static const unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
 618
 619         atm_dbg(usbatm, "%s entered\n", __func__);
 620
 621         if (status < 0) {
 622                 atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, status);
 623                 goto fail;
 624         }
 625
 626         if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) {
 627                 del_timer(&instance->status_check_timer);
 628                 atm_info(usbatm, "DSL line goes up\n");
 629         } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) {
 630                 atm_info(usbatm, "DSL line goes down\n");
 631         } else {
 632                 int i;
 633
 634                 atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count);
 635                 for (i = 0; i < count; i++)
 636                         printk(" %02x", instance->int_data[i]);
 637                 printk("\n");
 638                 goto fail;
 639         }
 640
 641         int_urb = instance->int_urb;
 642         if (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         int_urb = instance->int_urb;
 655         if (int_urb)
 656                 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
 657 }
 658
 659 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
 660 {
 661         struct usb_device *usb_dev = usbatm->usb_dev;
 662         struct speedtch_instance_data *instance = usbatm->driver_data;
 663         int i, ret;
 664         unsigned char mac_str[13];
 665
 666         atm_dbg(usbatm, "%s entered\n", __func__);
 667
 668         /* Set MAC address, it is stored in the serial number */
 669         memset(atm_dev->esi, 0, sizeof(atm_dev->esi));
 670         if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
 671                 for (i = 0; i < 6; i++)
 672                         atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) +
 673                                 hex_to_bin(mac_str[i * 2 + 1]);
 674         }
 675
 676         /* Start modem synchronisation */
 677         ret = speedtch_start_synchro(instance);
 678
 679         /* Set up interrupt endpoint */
 680         if (instance->int_urb) {
 681                 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
 682                 if (ret < 0) {
 683                         /* Doesn't matter; we'll poll anyway */
 684                         atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
 685                         usb_free_urb(instance->int_urb);
 686                         instance->int_urb = NULL;
 687                 }
 688         }
 689
 690         /* Start status polling */
 691         mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000));
 692
 693         return 0;
 694 }
 695
 696 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
 697 {
 698         struct speedtch_instance_data *instance = usbatm->driver_data;
 699         struct urb *int_urb = instance->int_urb;
 700
 701         atm_dbg(usbatm, "%s entered\n", __func__);
 702
 703         del_timer_sync(&instance->status_check_timer);
 704
 705         /*
 706          * Since resubmit_timer and int_urb can schedule themselves and
 707          * each other, shutting them down correctly takes some care
 708          */
 709         instance->int_urb = NULL; /* signal shutdown */
 710         mb();
 711         usb_kill_urb(int_urb);
 712         del_timer_sync(&instance->resubmit_timer);
 713         /*
 714          * At this point, speedtch_handle_int and speedtch_resubmit_int
 715          * can run or be running, but instance->int_urb == NULL means that
 716          * they will not reschedule
 717          */
 718         usb_kill_urb(int_urb);
 719         del_timer_sync(&instance->resubmit_timer);
 720         usb_free_urb(int_urb);
 721
 722         flush_work(&instance->status_check_work);
 723 }
 724
 725 static int speedtch_pre_reset(struct usb_interface *intf)
 726 {
 727         return 0;
 728 }
 729
 730 static int speedtch_post_reset(struct usb_interface *intf)
 731 {
 732         return 0;
 733 }
 734
 735
 736 /**********
 737 **  USB  **
 738 **********/
 739
 740 static const struct usb_device_id speedtch_usb_ids[] = {
 741         {USB_DEVICE(0x06b9, 0x4061)},
 742         {}
 743 };
 744
 745 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
 746
 747 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
 748
 749 static struct usb_driver speedtch_usb_driver = {
 750         .name           = speedtch_driver_name,
 751         .probe          = speedtch_usb_probe,
 752         .disconnect     = usbatm_usb_disconnect,
 753         .pre_reset      = speedtch_pre_reset,
 754         .post_reset     = speedtch_post_reset,
 755         .id_table       = speedtch_usb_ids
 756 };
 757
 758 static void speedtch_release_interfaces(struct usb_device *usb_dev,
 759                                         int num_interfaces)
 760 {
 761         struct usb_interface *cur_intf;
 762         int i;
 763
 764         for (i = 0; i < num_interfaces; i++) {
 765                 cur_intf = usb_ifnum_to_if(usb_dev, i);
 766                 if (cur_intf) {
 767                         usb_set_intfdata(cur_intf, NULL);
 768                         usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
 769                 }
 770         }
 771 }
 772
 773 static int speedtch_bind(struct usbatm_data *usbatm,
 774                          struct usb_interface *intf,
 775                          const struct usb_device_id *id)
 776 {
 777         struct usb_device *usb_dev = interface_to_usbdev(intf);
 778         struct usb_interface *cur_intf, *data_intf;
 779         struct speedtch_instance_data *instance;
 780         int ifnum = intf->altsetting->desc.bInterfaceNumber;
 781         int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
 782         int i, ret;
 783         int use_isoc;
 784
 785         usb_dbg(usbatm, "%s entered\n", __func__);
 786
 787         /* sanity checks */
 788
 789         if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
 790                 usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
 791                 return -ENODEV;
 792         }
 793
 794         data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA);
 795         if (!data_intf) {
 796                 usb_err(usbatm, "%s: data interface not found!\n", __func__);
 797                 return -ENODEV;
 798         }
 799
 800         /* claim all interfaces */
 801
 802         for (i = 0; i < num_interfaces; i++) {
 803                 cur_intf = usb_ifnum_to_if(usb_dev, i);
 804
 805                 if ((i != ifnum) && cur_intf) {
 806                         ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
 807
 808                         if (ret < 0) {
 809                                 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret);
 810                                 speedtch_release_interfaces(usb_dev, i);
 811                                 return ret;
 812                         }
 813                 }
 814         }
 815
 816         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
 817
 818         if (!instance) {
 819                 ret = -ENOMEM;
 820                 goto fail_release;
 821         }
 822
 823         instance->usbatm = usbatm;
 824
 825         /* module parameters may change at any moment, so take a snapshot */
 826         instance->params.altsetting = altsetting;
 827         instance->params.BMaxDSL = BMaxDSL;
 828         instance->params.ModemMode = ModemMode;
 829         memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);
 830         memcpy(instance->params.ModemOption, ModemOption, num_ModemOption);
 831         use_isoc = enable_isoc;
 832
 833         if (instance->params.altsetting)
 834                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
 835                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret);
 836                         instance->params.altsetting = 0; /* fall back to default */
 837                 }
 838
 839         if (!instance->params.altsetting && use_isoc)
 840                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) {
 841                         usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret);
 842                         use_isoc = 0; /* fall back to bulk */
 843                 }
 844
 845         if (use_isoc) {
 846                 const struct usb_host_interface *desc = data_intf->cur_altsetting;
 847                 const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in;
 848
 849                 use_isoc = 0; /* fall back to bulk if endpoint not found */
 850
 851                 for (i = 0; i < desc->desc.bNumEndpoints; i++) {
 852                         const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc;
 853
 854                         if ((endpoint_desc->bEndpointAddress == target_address)) {
 855                                 use_isoc =
 856                                         usb_endpoint_xfer_isoc(endpoint_desc);
 857                                 break;
 858                         }
 859                 }
 860
 861                 if (!use_isoc)
 862                         usb_info(usbatm, "isochronous transfer not supported - using bulk\n");
 863         }
 864
 865         if (!use_isoc && !instance->params.altsetting)
 866                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) {
 867                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret);
 868                         goto fail_free;
 869                 }
 870
 871         if (!instance->params.altsetting)
 872                 instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING;
 873
 874         usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
 875
 876         INIT_WORK(&instance->status_check_work, speedtch_check_status);
 877         init_timer(&instance->status_check_timer);
 878
 879         instance->status_check_timer.function = speedtch_status_poll;
 880         instance->status_check_timer.data = (unsigned long)instance;
 881         instance->last_status = 0xff;
 882         instance->poll_delay = MIN_POLL_DELAY;
 883
 884         init_timer(&instance->resubmit_timer);
 885         instance->resubmit_timer.function = speedtch_resubmit_int;
 886         instance->resubmit_timer.data = (unsigned long)instance;
 887
 888         instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 889
 890         if (instance->int_urb)
 891                 usb_fill_int_urb(instance->int_urb, usb_dev,
 892                                  usb_rcvintpipe(usb_dev, ENDPOINT_INT),
 893                                  instance->int_data, sizeof(instance->int_data),
 894                                  speedtch_handle_int, instance, 16);
 895         else
 896                 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
 897
 898         /* check whether the modem already seems to be alive */
 899         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 900                               0x12, 0xc0, 0x07, 0x00,
 901                               instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
 902
 903         usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0);
 904
 905         usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not");
 906
 907         if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT))
 908                 if ((ret = usb_reset_device(usb_dev)) < 0) {
 909                         usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret);
 910                         goto fail_free;
 911                 }
 912
 913         usbatm->driver_data = instance;
 914
 915         return 0;
 916
 917 fail_free:
 918         usb_free_urb(instance->int_urb);
 919         kfree(instance);
 920 fail_release:
 921         speedtch_release_interfaces(usb_dev, num_interfaces);
 922         return ret;
 923 }
 924
 925 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
 926 {
 927         struct usb_device *usb_dev = interface_to_usbdev(intf);
 928         struct speedtch_instance_data *instance = usbatm->driver_data;
 929
 930         usb_dbg(usbatm, "%s entered\n", __func__);
 931
 932         speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
 933         usb_free_urb(instance->int_urb);
 934         kfree(instance);
 935 }
 936
 937
 938 /***********
 939 **  init  **
 940 ***********/
 941
 942 static struct usbatm_driver speedtch_usbatm_driver = {
 943         .driver_name    = speedtch_driver_name,
 944         .bind           = speedtch_bind,
 945         .heavy_init     = speedtch_heavy_init,
 946         .unbind         = speedtch_unbind,
 947         .atm_start      = speedtch_atm_start,
 948         .atm_stop       = speedtch_atm_stop,
 949         .bulk_in        = ENDPOINT_BULK_DATA,
 950         .bulk_out       = ENDPOINT_BULK_DATA,
 951         .isoc_in        = ENDPOINT_ISOC_DATA
 952 };
 953
 954 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 955 {
 956         return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
 957 }
 958
 959 module_usb_driver(speedtch_usb_driver);
 960
 961 MODULE_AUTHOR(DRIVER_AUTHOR);
 962 MODULE_DESCRIPTION(DRIVER_DESC);
 963 MODULE_LICENSE("GPL");