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/init.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/slab.h>
  35 #include <linux/stat.h>
  36 #include <linux/timer.h>
  37 #include <linux/types.h>
  38 #include <linux/usb/ch9.h>
  39 #include <linux/workqueue.h>
  40
  41 #include "usbatm.h"
  42
  43 #define DRIVER_AUTHOR   "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
  44 #define DRIVER_VERSION  "1.10"
  45 #define DRIVER_DESC     "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
  46
  47 static const char speedtch_driver_name[] = "speedtch";
  48
  49 #define CTRL_TIMEOUT 2000       /* milliseconds */
  50 #define DATA_TIMEOUT 2000       /* milliseconds */
  51
  52 #define OFFSET_7        0               /* size 1 */
  53 #define OFFSET_b        1               /* size 8 */
  54 #define OFFSET_d        9               /* size 4 */
  55 #define OFFSET_e        13              /* size 1 */
  56 #define OFFSET_f        14              /* size 1 */
  57
  58 #define SIZE_7          1
  59 #define SIZE_b          8
  60 #define SIZE_d          4
  61 #define SIZE_e          1
  62 #define SIZE_f          1
  63
  64 #define MIN_POLL_DELAY          5000    /* milliseconds */
  65 #define MAX_POLL_DELAY          60000   /* milliseconds */
  66
  67 #define RESUBMIT_DELAY          1000    /* milliseconds */
  68
  69 #define DEFAULT_BULK_ALTSETTING 1
  70 #define DEFAULT_ISOC_ALTSETTING 3
  71 #define DEFAULT_DL_512_FIRST    0
  72 #define DEFAULT_ENABLE_ISOC     0
  73 #define DEFAULT_SW_BUFFERING    0
  74
  75 static unsigned int altsetting = 0; /* zero means: use the default */
  76 static int dl_512_first = DEFAULT_DL_512_FIRST;
  77 static int enable_isoc = DEFAULT_ENABLE_ISOC;
  78 static int sw_buffering = DEFAULT_SW_BUFFERING;
  79
  80 #define DEFAULT_B_MAX_DSL       8128
  81 #define DEFAULT_MODEM_MODE      11
  82 #define MODEM_OPTION_LENGTH     16
  83 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
  84         0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  85 };
  86
  87 static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL;
  88 static unsigned char ModemMode = DEFAULT_MODEM_MODE;
  89 static unsigned char ModemOption[MODEM_OPTION_LENGTH];
  90 static unsigned int num_ModemOption;
  91
  92 module_param(altsetting, uint, S_IRUGO | S_IWUSR);
  93 MODULE_PARM_DESC(altsetting,
  94                 "Alternative setting for data interface (bulk_default: "
  95                 __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: "
  96                 __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")");
  97
  98 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
  99 MODULE_PARM_DESC(dl_512_first,
 100                  "Read 512 bytes before sending firmware (default: "
 101                  __MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
 102
 103 module_param(enable_isoc, bool, S_IRUGO | S_IWUSR);
 104 MODULE_PARM_DESC(enable_isoc,
 105                 "Use isochronous transfers if available (default: "
 106                 __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")");
 107
 108 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
 109 MODULE_PARM_DESC(sw_buffering,
 110                  "Enable software buffering (default: "
 111                  __MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
 112
 113 module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR);
 114 MODULE_PARM_DESC(BMaxDSL,
 115                 "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL));
 116
 117 module_param(ModemMode, byte, S_IRUGO | S_IWUSR);
 118 MODULE_PARM_DESC(ModemMode,
 119                 "default: " __MODULE_STRING(DEFAULT_MODEM_MODE));
 120
 121 module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO);
 122 MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20");
 123
 124 #define INTERFACE_DATA          1
 125 #define ENDPOINT_INT            0x81
 126 #define ENDPOINT_BULK_DATA      0x07
 127 #define ENDPOINT_ISOC_DATA      0x07
 128 #define ENDPOINT_FIRMWARE       0x05
 129
 130 struct speedtch_params {
 131         unsigned int altsetting;
 132         unsigned int BMaxDSL;
 133         unsigned char ModemMode;
 134         unsigned char ModemOption[MODEM_OPTION_LENGTH];
 135 };
 136
 137 struct speedtch_instance_data {
 138         struct usbatm_data *usbatm;
 139
 140         struct speedtch_params params; /* set in probe, constant afterwards */
 141
 142         struct delayed_work status_checker;
 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                 dbg("speedtch_set_swbuff: %sbled SW buffering", 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         if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
 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, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
 371         usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 372
 373         if (request_firmware(fw_p, buf, dev)) {
 374                 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
 375                 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 376
 377                 if (request_firmware(fw_p, buf, dev)) {
 378                         sprintf(buf, "speedtch-%d.bin", phase);
 379                         usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 380
 381                         if (request_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_checker.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 = 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 = ATM_PHY_SIG_UNKNOWN;
 537                         atm_info(usbatm, "ADSL line is blocked?\n");
 538                         break;
 539
 540                 case 0x10:
 541                         atm_dev->signal = 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 = 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 = 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_delayed_work(&instance->status_checker, 0);
 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_checker.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_delayed_work(&instance->status_checker, 0);
 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_checker.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         if ((int_urb = instance->int_urb)) {
 642                 ret = usb_submit_urb(int_urb, GFP_ATOMIC);
 643                 schedule_delayed_work(&instance->status_checker, 0);
 644                 if (ret < 0) {
 645                         atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
 646                         goto fail;
 647                 }
 648         }
 649
 650         return;
 651
 652 fail:
 653         if ((int_urb = instance->int_urb))
 654                 mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
 655 }
 656
 657 static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
 658 {
 659         struct usb_device *usb_dev = usbatm->usb_dev;
 660         struct speedtch_instance_data *instance = usbatm->driver_data;
 661         int i, ret;
 662         unsigned char mac_str[13];
 663
 664         atm_dbg(usbatm, "%s entered\n", __func__);
 665
 666         /* Set MAC address, it is stored in the serial number */
 667         memset(atm_dev->esi, 0, sizeof(atm_dev->esi));
 668         if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
 669                 for (i = 0; i < 6; i++)
 670                         atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) +
 671                                 hex_to_bin(mac_str[i * 2 + 1]);
 672         }
 673
 674         /* Start modem synchronisation */
 675         ret = speedtch_start_synchro(instance);
 676
 677         /* Set up interrupt endpoint */
 678         if (instance->int_urb) {
 679                 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
 680                 if (ret < 0) {
 681                         /* Doesn't matter; we'll poll anyway */
 682                         atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
 683                         usb_free_urb(instance->int_urb);
 684                         instance->int_urb = NULL;
 685                 }
 686         }
 687
 688         /* Start status polling */
 689         mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(1000));
 690
 691         return 0;
 692 }
 693
 694 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
 695 {
 696         struct speedtch_instance_data *instance = usbatm->driver_data;
 697         struct urb *int_urb = instance->int_urb;
 698
 699         atm_dbg(usbatm, "%s entered\n", __func__);
 700
 701         del_timer_sync(&instance->status_checker.timer);
 702
 703         /*
 704          * Since resubmit_timer and int_urb can schedule themselves and
 705          * each other, shutting them down correctly takes some care
 706          */
 707         instance->int_urb = NULL; /* signal shutdown */
 708         mb();
 709         usb_kill_urb(int_urb);
 710         del_timer_sync(&instance->resubmit_timer);
 711         /*
 712          * At this point, speedtch_handle_int and speedtch_resubmit_int
 713          * can run or be running, but instance->int_urb == NULL means that
 714          * they will not reschedule
 715          */
 716         usb_kill_urb(int_urb);
 717         del_timer_sync(&instance->resubmit_timer);
 718         usb_free_urb(int_urb);
 719
 720         flush_scheduled_work();
 721 }
 722
 723 static int speedtch_pre_reset(struct usb_interface *intf)
 724 {
 725         return 0;
 726 }
 727
 728 static int speedtch_post_reset(struct usb_interface *intf)
 729 {
 730         return 0;
 731 }
 732
 733
 734 /**********
 735 **  USB  **
 736 **********/
 737
 738 static struct usb_device_id speedtch_usb_ids[] = {
 739         {USB_DEVICE(0x06b9, 0x4061)},
 740         {}
 741 };
 742
 743 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
 744
 745 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
 746
 747 static struct usb_driver speedtch_usb_driver = {
 748         .name           = speedtch_driver_name,
 749         .probe          = speedtch_usb_probe,
 750         .disconnect     = usbatm_usb_disconnect,
 751         .pre_reset      = speedtch_pre_reset,
 752         .post_reset     = speedtch_post_reset,
 753         .id_table       = speedtch_usb_ids
 754 };
 755
 756 static void speedtch_release_interfaces(struct usb_device *usb_dev, int num_interfaces) {
 757         struct usb_interface *cur_intf;
 758         int i;
 759
 760         for(i = 0; i < num_interfaces; i++)
 761                 if ((cur_intf = usb_ifnum_to_if(usb_dev, i))) {
 762                         usb_set_intfdata(cur_intf, NULL);
 763                         usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
 764                 }
 765 }
 766
 767 static int speedtch_bind(struct usbatm_data *usbatm,
 768                          struct usb_interface *intf,
 769                          const struct usb_device_id *id)
 770 {
 771         struct usb_device *usb_dev = interface_to_usbdev(intf);
 772         struct usb_interface *cur_intf, *data_intf;
 773         struct speedtch_instance_data *instance;
 774         int ifnum = intf->altsetting->desc.bInterfaceNumber;
 775         int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
 776         int i, ret;
 777         int use_isoc;
 778
 779         usb_dbg(usbatm, "%s entered\n", __func__);
 780
 781         /* sanity checks */
 782
 783         if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
 784                 usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
 785                 return -ENODEV;
 786         }
 787
 788         if (!(data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA))) {
 789                 usb_err(usbatm, "%s: data interface not found!\n", __func__);
 790                 return -ENODEV;
 791         }
 792
 793         /* claim all interfaces */
 794
 795         for (i=0; i < num_interfaces; i++) {
 796                 cur_intf = usb_ifnum_to_if(usb_dev, i);
 797
 798                 if ((i != ifnum) && cur_intf) {
 799                         ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
 800
 801                         if (ret < 0) {
 802                                 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret);
 803                                 speedtch_release_interfaces(usb_dev, i);
 804                                 return ret;
 805                         }
 806                 }
 807         }
 808
 809         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
 810
 811         if (!instance) {
 812                 usb_err(usbatm, "%s: no memory for instance data!\n", __func__);
 813                 ret = -ENOMEM;
 814                 goto fail_release;
 815         }
 816
 817         instance->usbatm = usbatm;
 818
 819         /* module parameters may change at any moment, so take a snapshot */
 820         instance->params.altsetting = altsetting;
 821         instance->params.BMaxDSL = BMaxDSL;
 822         instance->params.ModemMode = ModemMode;
 823         memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);
 824         memcpy(instance->params.ModemOption, ModemOption, num_ModemOption);
 825         use_isoc = enable_isoc;
 826
 827         if (instance->params.altsetting)
 828                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
 829                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret);
 830                         instance->params.altsetting = 0; /* fall back to default */
 831                 }
 832
 833         if (!instance->params.altsetting && use_isoc)
 834                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) {
 835                         usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret);
 836                         use_isoc = 0; /* fall back to bulk */
 837                 }
 838
 839         if (use_isoc) {
 840                 const struct usb_host_interface *desc = data_intf->cur_altsetting;
 841                 const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in;
 842
 843                 use_isoc = 0; /* fall back to bulk if endpoint not found */
 844
 845                 for (i=0; i<desc->desc.bNumEndpoints; i++) {
 846                         const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc;
 847
 848                         if ((endpoint_desc->bEndpointAddress == target_address)) {
 849                                 use_isoc =
 850                                         usb_endpoint_xfer_isoc(endpoint_desc);
 851                                 break;
 852                         }
 853                 }
 854
 855                 if (!use_isoc)
 856                         usb_info(usbatm, "isochronous transfer not supported - using bulk\n");
 857         }
 858
 859         if (!use_isoc && !instance->params.altsetting)
 860                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) {
 861                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret);
 862                         goto fail_free;
 863                 }
 864
 865         if (!instance->params.altsetting)
 866                 instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING;
 867
 868         usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
 869
 870         INIT_DELAYED_WORK(&instance->status_checker, speedtch_check_status);
 871
 872         instance->status_checker.timer.function = speedtch_status_poll;
 873         instance->status_checker.timer.data = (unsigned long)instance;
 874         instance->last_status = 0xff;
 875         instance->poll_delay = MIN_POLL_DELAY;
 876
 877         init_timer(&instance->resubmit_timer);
 878         instance->resubmit_timer.function = speedtch_resubmit_int;
 879         instance->resubmit_timer.data = (unsigned long)instance;
 880
 881         instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 882
 883         if (instance->int_urb)
 884                 usb_fill_int_urb(instance->int_urb, usb_dev,
 885                                  usb_rcvintpipe(usb_dev, ENDPOINT_INT),
 886                                  instance->int_data, sizeof(instance->int_data),
 887                                  speedtch_handle_int, instance, 50);
 888         else
 889                 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
 890
 891         /* check whether the modem already seems to be alive */
 892         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 893                               0x12, 0xc0, 0x07, 0x00,
 894                               instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
 895
 896         usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0);
 897
 898         usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not");
 899
 900         if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT))
 901                 if ((ret = usb_reset_device(usb_dev)) < 0) {
 902                         usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret);
 903                         goto fail_free;
 904                 }
 905
 906         usbatm->driver_data = instance;
 907
 908         return 0;
 909
 910 fail_free:
 911         usb_free_urb(instance->int_urb);
 912         kfree(instance);
 913 fail_release:
 914         speedtch_release_interfaces(usb_dev, num_interfaces);
 915         return ret;
 916 }
 917
 918 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
 919 {
 920         struct usb_device *usb_dev = interface_to_usbdev(intf);
 921         struct speedtch_instance_data *instance = usbatm->driver_data;
 922
 923         usb_dbg(usbatm, "%s entered\n", __func__);
 924
 925         speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
 926         usb_free_urb(instance->int_urb);
 927         kfree(instance);
 928 }
 929
 930
 931 /***********
 932 **  init  **
 933 ***********/
 934
 935 static struct usbatm_driver speedtch_usbatm_driver = {
 936         .driver_name    = speedtch_driver_name,
 937         .bind           = speedtch_bind,
 938         .heavy_init     = speedtch_heavy_init,
 939         .unbind         = speedtch_unbind,
 940         .atm_start      = speedtch_atm_start,
 941         .atm_stop       = speedtch_atm_stop,
 942         .bulk_in        = ENDPOINT_BULK_DATA,
 943         .bulk_out       = ENDPOINT_BULK_DATA,
 944         .isoc_in        = ENDPOINT_ISOC_DATA
 945 };
 946
 947 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 948 {
 949         return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
 950 }
 951
 952 static int __init speedtch_usb_init(void)
 953 {
 954         dbg("%s: driver version %s", __func__, DRIVER_VERSION);
 955
 956         return usb_register(&speedtch_usb_driver);
 957 }
 958
 959 static void __exit speedtch_usb_cleanup(void)
 960 {
 961         dbg("%s", __func__);
 962
 963         usb_deregister(&speedtch_usb_driver);
 964 }
 965
 966 module_init(speedtch_usb_init);
 967 module_exit(speedtch_usb_cleanup);
 968
 969 MODULE_AUTHOR(DRIVER_AUTHOR);
 970 MODULE_DESCRIPTION(DRIVER_DESC);
 971 MODULE_LICENSE("GPL");
 972 MODULE_VERSION(DRIVER_VERSION);