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   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/gfp.h>
  31 #include <linux/init.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/moduleparam.h>
  35 #include <linux/slab.h>
  36 #include <linux/stat.h>
  37 #include <linux/timer.h>
  38 #include <linux/types.h>
  39 #include <linux/usb_ch9.h>
  40 #include <linux/workqueue.h>
  41
  42 #include "usbatm.h"
  43
  44 #define DRIVER_AUTHOR   "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
  45 #define DRIVER_VERSION  "1.10"
  46 #define DRIVER_DESC     "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
  47
  48 static const char speedtch_driver_name[] = "speedtch";
  49
  50 #define CTRL_TIMEOUT 2000       /* milliseconds */
  51 #define DATA_TIMEOUT 2000       /* milliseconds */
  52
  53 #define OFFSET_7        0               /* size 1 */
  54 #define OFFSET_b        1               /* size 8 */
  55 #define OFFSET_d        9               /* size 4 */
  56 #define OFFSET_e        13              /* size 1 */
  57 #define OFFSET_f        14              /* size 1 */
  58
  59 #define SIZE_7          1
  60 #define SIZE_b          8
  61 #define SIZE_d          4
  62 #define SIZE_e          1
  63 #define SIZE_f          1
  64
  65 #define MIN_POLL_DELAY          5000    /* milliseconds */
  66 #define MAX_POLL_DELAY          60000   /* milliseconds */
  67
  68 #define RESUBMIT_DELAY          1000    /* milliseconds */
  69
  70 #define DEFAULT_BULK_ALTSETTING 1
  71 #define DEFAULT_ISOC_ALTSETTING 3
  72 #define DEFAULT_DL_512_FIRST    0
  73 #define DEFAULT_ENABLE_ISOC     0
  74 #define DEFAULT_SW_BUFFERING    0
  75
  76 static unsigned int altsetting = 0; /* zero means: use the default */
  77 static int dl_512_first = DEFAULT_DL_512_FIRST;
  78 static int enable_isoc = DEFAULT_ENABLE_ISOC;
  79 static int sw_buffering = DEFAULT_SW_BUFFERING;
  80
  81 #define DEFAULT_B_MAX_DSL       8128
  82 #define DEFAULT_MODEM_MODE      11
  83 #define MODEM_OPTION_LENGTH     16
  84 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
  85         0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  86 };
  87
  88 static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL;
  89 static unsigned char ModemMode = DEFAULT_MODEM_MODE;
  90 static unsigned char ModemOption[MODEM_OPTION_LENGTH];
  91 static int num_ModemOption;
  92
  93 module_param(altsetting, uint, S_IRUGO | S_IWUSR);
  94 MODULE_PARM_DESC(altsetting,
  95                 "Alternative setting for data interface (bulk_default: "
  96                 __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: "
  97                 __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")");
  98
  99 module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
 100 MODULE_PARM_DESC(dl_512_first,
 101                  "Read 512 bytes before sending firmware (default: "
 102                  __MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
 103
 104 module_param(enable_isoc, bool, S_IRUGO | S_IWUSR);
 105 MODULE_PARM_DESC(enable_isoc,
 106                 "Use isochronous transfers if available (default: "
 107                 __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")");
 108
 109 module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
 110 MODULE_PARM_DESC(sw_buffering,
 111                  "Enable software buffering (default: "
 112                  __MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
 113
 114 module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR);
 115 MODULE_PARM_DESC(BMaxDSL,
 116                 "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL));
 117
 118 module_param(ModemMode, byte, S_IRUGO | S_IWUSR);
 119 MODULE_PARM_DESC(ModemMode,
 120                 "default: " __MODULE_STRING(DEFAULT_MODEM_MODE));
 121
 122 module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO);
 123 MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20");
 124
 125 #define INTERFACE_DATA          1
 126 #define ENDPOINT_INT            0x81
 127 #define ENDPOINT_BULK_DATA      0x07
 128 #define ENDPOINT_ISOC_DATA      0x07
 129 #define ENDPOINT_FIRMWARE       0x05
 130
 131 #define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) )
 132
 133 struct speedtch_params {
 134         unsigned int altsetting;
 135         unsigned int BMaxDSL;
 136         unsigned char ModemMode;
 137         unsigned char ModemOption[MODEM_OPTION_LENGTH];
 138 };
 139
 140 struct speedtch_instance_data {
 141         struct usbatm_data *usbatm;
 142
 143         struct speedtch_params params; /* set in probe, constant afterwards */
 144
 145         struct work_struct status_checker;
 146
 147         unsigned char last_status;
 148
 149         int poll_delay; /* milliseconds */
 150
 151         struct timer_list resubmit_timer;
 152         struct urb *int_urb;
 153         unsigned char int_data[16];
 154
 155         unsigned char scratch_buffer[16];
 156 };
 157
 158 /***************
 159 **  firmware  **
 160 ***************/
 161
 162 static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state)
 163 {
 164         struct usbatm_data *usbatm = instance->usbatm;
 165         struct usb_device *usb_dev = usbatm->usb_dev;
 166         int ret;
 167
 168         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 169                               0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT);
 170         if (ret < 0)
 171                 usb_warn(usbatm,
 172                          "%sabling SW buffering: usb_control_msg returned %d\n",
 173                          state ? "En" : "Dis", ret);
 174         else
 175                 dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis");
 176 }
 177
 178 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
 179 {
 180         struct usbatm_data *usbatm = instance->usbatm;
 181         struct usb_device *usb_dev = usbatm->usb_dev;
 182         unsigned char *buf = instance->scratch_buffer;
 183         int ret;
 184
 185         /* URB 147 */
 186         buf[0] = 0x1c;
 187         buf[1] = 0x50;
 188         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 189                               0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT);
 190         if (ret < 0)
 191                 usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret);
 192
 193         /* URB 148 */
 194         buf[0] = 0x32;
 195         buf[1] = 0x00;
 196         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 197                               0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT);
 198         if (ret < 0)
 199                 usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret);
 200
 201         /* URB 149 */
 202         buf[0] = 0x01;
 203         buf[1] = 0x00;
 204         buf[2] = 0x01;
 205         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 206                               0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT);
 207         if (ret < 0)
 208                 usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret);
 209
 210         /* URB 150 */
 211         buf[0] = 0x01;
 212         buf[1] = 0x00;
 213         buf[2] = 0x01;
 214         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 215                               0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT);
 216         if (ret < 0)
 217                 usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret);
 218
 219         /* Extra initialisation in recent drivers - gives higher speeds */
 220
 221         /* URBext1 */
 222         buf[0] = instance->params.ModemMode;
 223         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 224                               0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT);
 225         if (ret < 0)
 226                 usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret);
 227
 228         /* URBext2 */
 229         /* This seems to be the one which actually triggers the higher sync
 230            rate -- it does require the new firmware too, although it works OK
 231            with older firmware */
 232         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 233                               0x01, 0x40, 0x14, 0x00,
 234                               instance->params.ModemOption,
 235                               MODEM_OPTION_LENGTH, CTRL_TIMEOUT);
 236         if (ret < 0)
 237                 usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret);
 238
 239         /* URBext3 */
 240         buf[0] = instance->params.BMaxDSL & 0xff;
 241         buf[1] = instance->params.BMaxDSL >> 8;
 242         ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
 243                               0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT);
 244         if (ret < 0)
 245                 usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret);
 246 }
 247
 248 static int speedtch_upload_firmware(struct speedtch_instance_data *instance,
 249                                      const struct firmware *fw1,
 250                                      const struct firmware *fw2)
 251 {
 252         unsigned char *buffer;
 253         struct usbatm_data *usbatm = instance->usbatm;
 254         struct usb_interface *intf;
 255         struct usb_device *usb_dev = usbatm->usb_dev;
 256         int actual_length;
 257         int ret = 0;
 258         int offset;
 259
 260         usb_dbg(usbatm, "%s entered\n", __func__);
 261
 262         if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
 263                 ret = -ENOMEM;
 264                 usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__);
 265                 goto out;
 266         }
 267
 268         if (!(intf = usb_ifnum_to_if(usb_dev, 2))) {
 269                 ret = -ENODEV;
 270                 usb_dbg(usbatm, "%s: interface not found!\n", __func__);
 271                 goto out_free;
 272         }
 273
 274         /* URB 7 */
 275         if (dl_512_first) {     /* some modems need a read before writing the firmware */
 276                 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 277                                    buffer, 0x200, &actual_length, 2000);
 278
 279                 if (ret < 0 && ret != -ETIMEDOUT)
 280                         usb_warn(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret);
 281                 else
 282                         usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret);
 283         }
 284
 285         /* URB 8 : both leds are static green */
 286         for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
 287                 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
 288                 memcpy(buffer, fw1->data + offset, thislen);
 289
 290                 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 291                                    buffer, thislen, &actual_length, DATA_TIMEOUT);
 292
 293                 if (ret < 0) {
 294                         usb_err(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret);
 295                         goto out_free;
 296                 }
 297                 usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size);
 298         }
 299
 300         /* USB led blinking green, ADSL led off */
 301
 302         /* URB 11 */
 303         ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 304                            buffer, 0x200, &actual_length, DATA_TIMEOUT);
 305
 306         if (ret < 0) {
 307                 usb_err(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret);
 308                 goto out_free;
 309         }
 310         usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length);
 311
 312         /* URBs 12 to 139 - USB led blinking green, ADSL led off */
 313         for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
 314                 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
 315                 memcpy(buffer, fw2->data + offset, thislen);
 316
 317                 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 318                                    buffer, thislen, &actual_length, DATA_TIMEOUT);
 319
 320                 if (ret < 0) {
 321                         usb_err(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret);
 322                         goto out_free;
 323                 }
 324         }
 325         usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size);
 326
 327         /* USB led static green, ADSL led static red */
 328
 329         /* URB 142 */
 330         ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
 331                            buffer, 0x200, &actual_length, DATA_TIMEOUT);
 332
 333         if (ret < 0) {
 334                 usb_err(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret);
 335                 goto out_free;
 336         }
 337
 338         /* success */
 339         usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length);
 340
 341         /* Delay to allow firmware to start up. We can do this here
 342            because we're in our own kernel thread anyway. */
 343         msleep_interruptible(1000);
 344
 345         if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
 346                 usb_err(usbatm, "%s: setting interface to %d failed (%d)!\n", __func__, instance->params.altsetting, ret);
 347                 goto out_free;
 348         }
 349
 350         /* Enable software buffering, if requested */
 351         if (sw_buffering)
 352                 speedtch_set_swbuff(instance, 1);
 353
 354         /* Magic spell; don't ask us what this does */
 355         speedtch_test_sequence(instance);
 356
 357         ret = 0;
 358
 359 out_free:
 360         free_page((unsigned long)buffer);
 361 out:
 362         return ret;
 363 }
 364
 365 static int speedtch_find_firmware(struct usbatm_data *usbatm, struct usb_interface *intf,
 366                                   int phase, const struct firmware **fw_p)
 367 {
 368         struct device *dev = &intf->dev;
 369         const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice);
 370         const u8 major_revision = bcdDevice >> 8;
 371         const u8 minor_revision = bcdDevice & 0xff;
 372         char buf[24];
 373
 374         sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_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.%x", phase, major_revision);
 379                 usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 380
 381                 if (request_firmware(fw_p, buf, dev)) {
 382                         sprintf(buf, "speedtch-%d.bin", phase);
 383                         usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
 384
 385                         if (request_firmware(fw_p, buf, dev)) {
 386                                 usb_err(usbatm, "%s: no stage %d firmware found!\n", __func__, phase);
 387                                 return -ENOENT;
 388                         }
 389                 }
 390         }
 391
 392         usb_info(usbatm, "found stage %d firmware %s\n", phase, buf);
 393
 394         return 0;
 395 }
 396
 397 static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf)
 398 {
 399         const struct firmware *fw1, *fw2;
 400         struct speedtch_instance_data *instance = usbatm->driver_data;
 401         int ret;
 402
 403         if ((ret = speedtch_find_firmware(usbatm, intf, 1, &fw1)) < 0)
 404                 return ret;
 405
 406         if ((ret = speedtch_find_firmware(usbatm, intf, 2, &fw2)) < 0) {
 407                 release_firmware(fw1);
 408                 return ret;
 409         }
 410
 411         if ((ret = speedtch_upload_firmware(instance, fw1, fw2)) < 0)
 412                 usb_err(usbatm, "%s: firmware upload failed (%d)!\n", __func__, ret);
 413
 414         release_firmware(fw2);
 415         release_firmware(fw1);
 416
 417         return ret;
 418 }
 419
 420
 421 /**********
 422 **  ATM  **
 423 **********/
 424
 425 static int speedtch_read_status(struct speedtch_instance_data *instance)
 426 {
 427         struct usbatm_data *usbatm = instance->usbatm;
 428         struct usb_device *usb_dev = usbatm->usb_dev;
 429         unsigned char *buf = instance->scratch_buffer;
 430         int ret;
 431
 432         memset(buf, 0, 16);
 433
 434         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 435                               0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
 436                               CTRL_TIMEOUT);
 437         if (ret < 0) {
 438                 atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__);
 439                 return ret;
 440         }
 441
 442         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 443                               0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
 444                               CTRL_TIMEOUT);
 445         if (ret < 0) {
 446                 atm_dbg(usbatm, "%s: MSG B failed\n", __func__);
 447                 return ret;
 448         }
 449
 450         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 451                               0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
 452                               CTRL_TIMEOUT);
 453         if (ret < 0) {
 454                 atm_dbg(usbatm, "%s: MSG D failed\n", __func__);
 455                 return ret;
 456         }
 457
 458         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 459                               0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
 460                               CTRL_TIMEOUT);
 461         if (ret < 0) {
 462                 atm_dbg(usbatm, "%s: MSG E failed\n", __func__);
 463                 return ret;
 464         }
 465
 466         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 467                               0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
 468                               CTRL_TIMEOUT);
 469         if (ret < 0) {
 470                 atm_dbg(usbatm, "%s: MSG F failed\n", __func__);
 471                 return ret;
 472         }
 473
 474         return 0;
 475 }
 476
 477 static int speedtch_start_synchro(struct speedtch_instance_data *instance)
 478 {
 479         struct usbatm_data *usbatm = instance->usbatm;
 480         struct usb_device *usb_dev = usbatm->usb_dev;
 481         unsigned char *buf = instance->scratch_buffer;
 482         int ret;
 483
 484         atm_dbg(usbatm, "%s entered\n", __func__);
 485
 486         memset(buf, 0, 2);
 487
 488         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 489                               0x12, 0xc0, 0x04, 0x00,
 490                               buf, 2, CTRL_TIMEOUT);
 491
 492         if (ret < 0)
 493                 atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret);
 494         else
 495                 atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n",
 496                         __func__, ret, buf[0], buf[1]);
 497
 498         return ret;
 499 }
 500
 501 static void speedtch_check_status(struct speedtch_instance_data *instance)
 502 {
 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 = 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 = ATM_PHY_SIG_UNKNOWN;
 538                         atm_info(usbatm, "ADSL line is blocked?\n");
 539                         break;
 540
 541                 case 0x10:
 542                         atm_dev->signal = 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 = 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 = 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_checker);
 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_checker.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_checker);
 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 ret = int_urb->status;
 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 (ret < 0) {
 622                 atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, ret);
 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_work(&instance->status_checker);
 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] = (hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1]));
 671         }
 672
 673         /* Start modem synchronisation */
 674         ret = speedtch_start_synchro(instance);
 675
 676         /* Set up interrupt endpoint */
 677         if (instance->int_urb) {
 678                 ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
 679                 if (ret < 0) {
 680                         /* Doesn't matter; we'll poll anyway */
 681                         atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
 682                         usb_free_urb(instance->int_urb);
 683                         instance->int_urb = NULL;
 684                 }
 685         }
 686
 687         /* Start status polling */
 688         mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(1000));
 689
 690         return 0;
 691 }
 692
 693 static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
 694 {
 695         struct speedtch_instance_data *instance = usbatm->driver_data;
 696         struct urb *int_urb = instance->int_urb;
 697
 698         atm_dbg(usbatm, "%s entered\n", __func__);
 699
 700         del_timer_sync(&instance->status_checker.timer);
 701
 702         /*
 703          * Since resubmit_timer and int_urb can schedule themselves and
 704          * each other, shutting them down correctly takes some care
 705          */
 706         instance->int_urb = NULL; /* signal shutdown */
 707         mb();
 708         usb_kill_urb(int_urb);
 709         del_timer_sync(&instance->resubmit_timer);
 710         /*
 711          * At this point, speedtch_handle_int and speedtch_resubmit_int
 712          * can run or be running, but instance->int_urb == NULL means that
 713          * they will not reschedule
 714          */
 715         usb_kill_urb(int_urb);
 716         del_timer_sync(&instance->resubmit_timer);
 717         usb_free_urb(int_urb);
 718
 719         flush_scheduled_work();
 720 }
 721
 722
 723 /**********
 724 **  USB  **
 725 **********/
 726
 727 static struct usb_device_id speedtch_usb_ids[] = {
 728         {USB_DEVICE(0x06b9, 0x4061)},
 729         {}
 730 };
 731
 732 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
 733
 734 static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
 735
 736 static struct usb_driver speedtch_usb_driver = {
 737         .name           = speedtch_driver_name,
 738         .probe          = speedtch_usb_probe,
 739         .disconnect     = usbatm_usb_disconnect,
 740         .id_table       = speedtch_usb_ids
 741 };
 742
 743 static void speedtch_release_interfaces(struct usb_device *usb_dev, int num_interfaces) {
 744         struct usb_interface *cur_intf;
 745         int i;
 746
 747         for(i = 0; i < num_interfaces; i++)
 748                 if ((cur_intf = usb_ifnum_to_if(usb_dev, i))) {
 749                         usb_set_intfdata(cur_intf, NULL);
 750                         usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
 751                 }
 752 }
 753
 754 static int speedtch_bind(struct usbatm_data *usbatm,
 755                          struct usb_interface *intf,
 756                          const struct usb_device_id *id)
 757 {
 758         struct usb_device *usb_dev = interface_to_usbdev(intf);
 759         struct usb_interface *cur_intf, *data_intf;
 760         struct speedtch_instance_data *instance;
 761         int ifnum = intf->altsetting->desc.bInterfaceNumber;
 762         int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
 763         int i, ret;
 764         int use_isoc;
 765
 766         usb_dbg(usbatm, "%s entered\n", __func__);
 767
 768         /* sanity checks */
 769
 770         if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
 771                 usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
 772                 return -ENODEV;
 773         }
 774
 775         if (!(data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA))) {
 776                 usb_err(usbatm, "%s: data interface not found!\n", __func__);
 777                 return -ENODEV;
 778         }
 779
 780         /* claim all interfaces */
 781
 782         for (i=0; i < num_interfaces; i++) {
 783                 cur_intf = usb_ifnum_to_if(usb_dev, i);
 784
 785                 if ((i != ifnum) && cur_intf) {
 786                         ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
 787
 788                         if (ret < 0) {
 789                                 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret);
 790                                 speedtch_release_interfaces(usb_dev, i);
 791                                 return ret;
 792                         }
 793                 }
 794         }
 795
 796         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
 797
 798         if (!instance) {
 799                 usb_err(usbatm, "%s: no memory for instance data!\n", __func__);
 800                 ret = -ENOMEM;
 801                 goto fail_release;
 802         }
 803
 804         instance->usbatm = usbatm;
 805
 806         /* module parameters may change at any moment, so take a snapshot */
 807         instance->params.altsetting = altsetting;
 808         instance->params.BMaxDSL = BMaxDSL;
 809         instance->params.ModemMode = ModemMode;
 810         memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);
 811         memcpy(instance->params.ModemOption, ModemOption, num_ModemOption);
 812         use_isoc = enable_isoc;
 813
 814         if (instance->params.altsetting)
 815                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
 816                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret);
 817                         instance->params.altsetting = 0; /* fall back to default */
 818                 }
 819
 820         if (!instance->params.altsetting && use_isoc)
 821                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) {
 822                         usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret);
 823                         use_isoc = 0; /* fall back to bulk */
 824                 }
 825
 826         if (use_isoc) {
 827                 const struct usb_host_interface *desc = data_intf->cur_altsetting;
 828                 const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in;
 829                 int i;
 830
 831                 use_isoc = 0; /* fall back to bulk if endpoint not found */
 832
 833                 for (i=0; i<desc->desc.bNumEndpoints; i++) {
 834                         const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc;
 835
 836                         if ((endpoint_desc->bEndpointAddress == target_address)) {
 837                                 use_isoc = (endpoint_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 838                                         USB_ENDPOINT_XFER_ISOC;
 839                                 break;
 840                         }
 841                 }
 842
 843                 if (!use_isoc)
 844                         usb_info(usbatm, "isochronous transfer not supported - using bulk\n");
 845         }
 846
 847         if (!use_isoc && !instance->params.altsetting)
 848                 if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) {
 849                         usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret);
 850                         goto fail_free;
 851                 }
 852
 853         if (!instance->params.altsetting)
 854                 instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING;
 855
 856         usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
 857
 858         INIT_WORK(&instance->status_checker, (void *)speedtch_check_status, instance);
 859
 860         instance->status_checker.timer.function = speedtch_status_poll;
 861         instance->status_checker.timer.data = (unsigned long)instance;
 862         instance->last_status = 0xff;
 863         instance->poll_delay = MIN_POLL_DELAY;
 864
 865         init_timer(&instance->resubmit_timer);
 866         instance->resubmit_timer.function = speedtch_resubmit_int;
 867         instance->resubmit_timer.data = (unsigned long)instance;
 868
 869         instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 870
 871         if (instance->int_urb)
 872                 usb_fill_int_urb(instance->int_urb, usb_dev,
 873                                  usb_rcvintpipe(usb_dev, ENDPOINT_INT),
 874                                  instance->int_data, sizeof(instance->int_data),
 875                                  speedtch_handle_int, instance, 50);
 876         else
 877                 usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
 878
 879         /* check whether the modem already seems to be alive */
 880         ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
 881                               0x12, 0xc0, 0x07, 0x00,
 882                               instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
 883
 884         usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0);
 885
 886         usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not");
 887
 888         if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT))
 889                 if ((ret = usb_reset_device(usb_dev)) < 0) {
 890                         usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret);
 891                         goto fail_free;
 892                 }
 893
 894         usbatm->driver_data = instance;
 895
 896         return 0;
 897
 898 fail_free:
 899         usb_free_urb(instance->int_urb);
 900         kfree(instance);
 901 fail_release:
 902         speedtch_release_interfaces(usb_dev, num_interfaces);
 903         return ret;
 904 }
 905
 906 static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
 907 {
 908         struct usb_device *usb_dev = interface_to_usbdev(intf);
 909         struct speedtch_instance_data *instance = usbatm->driver_data;
 910
 911         usb_dbg(usbatm, "%s entered\n", __func__);
 912
 913         speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
 914         usb_free_urb(instance->int_urb);
 915         kfree(instance);
 916 }
 917
 918
 919 /***********
 920 **  init  **
 921 ***********/
 922
 923 static struct usbatm_driver speedtch_usbatm_driver = {
 924         .driver_name    = speedtch_driver_name,
 925         .bind           = speedtch_bind,
 926         .heavy_init     = speedtch_heavy_init,
 927         .unbind         = speedtch_unbind,
 928         .atm_start      = speedtch_atm_start,
 929         .atm_stop       = speedtch_atm_stop,
 930         .bulk_in        = ENDPOINT_BULK_DATA,
 931         .bulk_out       = ENDPOINT_BULK_DATA,
 932         .isoc_in        = ENDPOINT_ISOC_DATA
 933 };
 934
 935 static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 936 {
 937         return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
 938 }
 939
 940 static int __init speedtch_usb_init(void)
 941 {
 942         dbg("%s: driver version %s", __func__, DRIVER_VERSION);
 943
 944         return usb_register(&speedtch_usb_driver);
 945 }
 946
 947 static void __exit speedtch_usb_cleanup(void)
 948 {
 949         dbg("%s", __func__);
 950
 951         usb_deregister(&speedtch_usb_driver);
 952 }
 953
 954 module_init(speedtch_usb_init);
 955 module_exit(speedtch_usb_cleanup);
 956
 957 MODULE_AUTHOR(DRIVER_AUTHOR);
 958 MODULE_DESCRIPTION(DRIVER_DESC);
 959 MODULE_LICENSE("GPL");
 960 MODULE_VERSION(DRIVER_VERSION);