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  *  This program is free software; you can redistribute it and/or modify it
   9  *  under the terms of the GNU General Public License as published by the Free
  10  *  Software Foundation; either version 2 of the License, or (at your option)
  11  *  any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but WITHOUT
  14  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  *  more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along with
  19  *  this program; if not, write to the Free Software Foundation, Inc., 59
  20  *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21  *
  22  ******************************************************************************/
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/gfp.h>
  27 #include <linux/kernel.h>
  28 #include <linux/sched.h>
  29 #include <linux/timer.h>
  30 #include <linux/errno.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/slab.h>
  33 #include <linux/wait.h>
  34 #include <linux/list.h>
  35 #include <asm/processor.h>
  36 #include <asm/uaccess.h>
  37 #include <linux/smp_lock.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/atm.h>
  40 #include <linux/atmdev.h>
  41 #include <linux/crc32.h>
  42 #include <linux/init.h>
  43 #include <linux/firmware.h>
  44
  45 #include "usb_atm.h"
  46
  47 #if defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE)
  48 #       define USE_FW_LOADER
  49 #endif
  50
  51 #define DRIVER_AUTHOR   "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
  52 #define DRIVER_VERSION  "1.8"
  53 #define DRIVER_DESC     "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
  54
  55 static const char speedtch_driver_name[] = "speedtch";
  56
  57 #define SPEEDTOUCH_VENDORID             0x06b9
  58 #define SPEEDTOUCH_PRODUCTID            0x4061
  59
  60 /* Timeout in jiffies */
  61 #define CTRL_TIMEOUT 2000
  62 #define DATA_TIMEOUT 2000
  63
  64 #define OFFSET_7  0             /* size 1 */
  65 #define OFFSET_b  1             /* size 8 */
  66 #define OFFSET_d  9             /* size 4 */
  67 #define OFFSET_e 13             /* size 1 */
  68 #define OFFSET_f 14             /* size 1 */
  69 #define TOTAL    15
  70
  71 #define SIZE_7 1
  72 #define SIZE_b 8
  73 #define SIZE_d 4
  74 #define SIZE_e 1
  75 #define SIZE_f 1
  76
  77 static int dl_512_first = 0;
  78 static int sw_buffering = 0;
  79
  80 module_param(dl_512_first, bool, 0444);
  81 MODULE_PARM_DESC(dl_512_first, "Read 512 bytes before sending firmware");
  82
  83 module_param(sw_buffering, uint, 0444);
  84 MODULE_PARM_DESC(sw_buffering, "Enable software buffering");
  85
  86 #define UDSL_IOCTL_LINE_UP              1
  87 #define UDSL_IOCTL_LINE_DOWN            2
  88
  89 #define SPEEDTCH_ENDPOINT_INT           0x81
  90 #define SPEEDTCH_ENDPOINT_DATA          0x07
  91 #define SPEEDTCH_ENDPOINT_FIRMWARE      0x05
  92
  93 #define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) )
  94
  95 static struct usb_device_id speedtch_usb_ids[] = {
  96         {USB_DEVICE(SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID)},
  97         {}
  98 };
  99
 100 MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
 101
 102 struct speedtch_instance_data {
 103         struct udsl_instance_data u;
 104
 105         /* Status */
 106         struct urb *int_urb;
 107         unsigned char int_data[16];
 108         struct work_struct poll_work;
 109         struct timer_list poll_timer;
 110 };
 111 /* USB */
 112
 113 static int speedtch_usb_probe(struct usb_interface *intf,
 114                               const struct usb_device_id *id);
 115 static void speedtch_usb_disconnect(struct usb_interface *intf);
 116 static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code,
 117                               void *user_data);
 118 static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs);
 119 static void speedtch_poll_status(struct speedtch_instance_data *instance);
 120
 121 static struct usb_driver speedtch_usb_driver = {
 122         .owner          = THIS_MODULE,
 123         .name           = speedtch_driver_name,
 124         .probe          = speedtch_usb_probe,
 125         .disconnect     = speedtch_usb_disconnect,
 126         .ioctl          = speedtch_usb_ioctl,
 127         .id_table       = speedtch_usb_ids,
 128 };
 129
 130 /***************
 131 **  firmware  **
 132 ***************/
 133
 134 static void speedtch_got_firmware(struct speedtch_instance_data *instance,
 135                                   int got_it)
 136 {
 137         int err;
 138         struct usb_interface *intf;
 139
 140         down(&instance->u.serialize);   /* vs self, speedtch_firmware_start */
 141         if (instance->u.status == UDSL_LOADED_FIRMWARE)
 142                 goto out;
 143         if (!got_it) {
 144                 instance->u.status = UDSL_NO_FIRMWARE;
 145                 goto out;
 146         }
 147         if ((err = usb_set_interface(instance->u.usb_dev, 1, 1)) < 0) {
 148                 dbg("speedtch_got_firmware: usb_set_interface returned %d!", err);
 149                 instance->u.status = UDSL_NO_FIRMWARE;
 150                 goto out;
 151         }
 152
 153         /* Set up interrupt endpoint */
 154         intf = usb_ifnum_to_if(instance->u.usb_dev, 0);
 155         if (intf && !usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) {
 156
 157                 instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 158                 if (instance->int_urb) {
 159
 160                         usb_fill_int_urb(instance->int_urb, instance->u.usb_dev,
 161                                          usb_rcvintpipe(instance->u.usb_dev, SPEEDTCH_ENDPOINT_INT),
 162                                          instance->int_data,
 163                                          sizeof(instance->int_data),
 164                                          speedtch_handle_int, instance, 50);
 165                         err = usb_submit_urb(instance->int_urb, GFP_KERNEL);
 166                         if (err) {
 167                                 /* Doesn't matter; we'll poll anyway */
 168                                 dbg("speedtch_got_firmware: Submission of interrupt URB failed %d", err);
 169                                 usb_free_urb(instance->int_urb);
 170                                 instance->int_urb = NULL;
 171                                 usb_driver_release_interface(&speedtch_usb_driver, intf);
 172                         }
 173                 }
 174         }
 175         /* Start status polling */
 176         mod_timer(&instance->poll_timer, jiffies + (1 * HZ));
 177
 178         instance->u.status = UDSL_LOADED_FIRMWARE;
 179         tasklet_schedule(&instance->u.receive_tasklet);
 180  out:
 181         up(&instance->u.serialize);
 182         wake_up_interruptible(&instance->u.firmware_waiters);
 183 }
 184
 185 static int speedtch_set_swbuff(struct speedtch_instance_data *instance,
 186                                int state)
 187 {
 188         struct usb_device *dev = instance->u.usb_dev;
 189         int ret;
 190
 191         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 192                               0x32, 0x40, state ? 0x01 : 0x00,
 193                               0x00, NULL, 0, 100);
 194         if (ret < 0) {
 195                 printk("Warning: %sabling SW buffering: usb_control_msg returned %d\n",
 196                      state ? "En" : "Dis", ret);
 197                 return ret;
 198         }
 199
 200         dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis");
 201         return 0;
 202 }
 203
 204 static void speedtch_test_sequence(struct speedtch_instance_data *instance)
 205 {
 206         struct usb_device *dev = instance->u.usb_dev;
 207         unsigned char buf[10];
 208         int ret;
 209
 210         /* URB 147 */
 211         buf[0] = 0x1c;
 212         buf[1] = 0x50;
 213         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 214                               0x01, 0x40, 0x0b, 0x00, buf, 2, 100);
 215         if (ret < 0)
 216                 printk(KERN_WARNING "%s failed on URB147: %d\n", __func__, ret);
 217
 218         /* URB 148 */
 219         buf[0] = 0x32;
 220         buf[1] = 0x00;
 221         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 222                               0x01, 0x40, 0x02, 0x00, buf, 2, 100);
 223         if (ret < 0)
 224                 printk(KERN_WARNING "%s failed on URB148: %d\n", __func__, ret);
 225
 226         /* URB 149 */
 227         buf[0] = 0x01;
 228         buf[1] = 0x00;
 229         buf[2] = 0x01;
 230         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 231                               0x01, 0x40, 0x03, 0x00, buf, 3, 100);
 232         if (ret < 0)
 233                 printk(KERN_WARNING "%s failed on URB149: %d\n", __func__, ret);
 234
 235         /* URB 150 */
 236         buf[0] = 0x01;
 237         buf[1] = 0x00;
 238         buf[2] = 0x01;
 239         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 240                               0x01, 0x40, 0x04, 0x00, buf, 3, 100);
 241         if (ret < 0)
 242                 printk(KERN_WARNING "%s failed on URB150: %d\n", __func__, ret);
 243 }
 244
 245 static int speedtch_start_synchro(struct speedtch_instance_data *instance)
 246 {
 247         struct usb_device *dev = instance->u.usb_dev;
 248         unsigned char buf[2];
 249         int ret;
 250
 251         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 252                               0x12, 0xc0, 0x04, 0x00,
 253                               buf, sizeof(buf), CTRL_TIMEOUT);
 254         if (ret < 0) {
 255                 printk(KERN_WARNING "SpeedTouch: Failed to start ADSL synchronisation: %d\n", ret);
 256                 return ret;
 257         }
 258
 259         dbg("speedtch_start_synchro: modem prodded. %d Bytes returned: %02x %02x", ret, buf[0], buf[1]);
 260         return 0;
 261 }
 262
 263 static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs)
 264 {
 265         struct speedtch_instance_data *instance = urb->context;
 266         unsigned int count = urb->actual_length;
 267         int ret;
 268
 269         /* The magic interrupt for "up state" */
 270         const static unsigned char up_int[6]   = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
 271         /* The magic interrupt for "down state" */
 272         const static unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
 273
 274         switch (urb->status) {
 275         case 0:
 276                 /* success */
 277                 break;
 278         case -ECONNRESET:
 279         case -ENOENT:
 280         case -ESHUTDOWN:
 281                 /* this urb is terminated; clean up */
 282                 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
 283                 return;
 284         default:
 285                 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
 286                 goto exit;
 287         }
 288
 289         if (count < 6) {
 290                 dbg("%s - int packet too short", __func__);
 291                 goto exit;
 292         }
 293
 294         if (!memcmp(up_int, instance->int_data, 6)) {
 295                 del_timer(&instance->poll_timer);
 296                 printk(KERN_NOTICE "DSL line goes up\n");
 297         } else if (!memcmp(down_int, instance->int_data, 6)) {
 298                 printk(KERN_NOTICE "DSL line goes down\n");
 299         } else {
 300                 int i;
 301
 302                 printk(KERN_DEBUG "Unknown interrupt packet of %d bytes:", count);
 303                 for (i = 0; i < count; i++)
 304                         printk(" %02x", instance->int_data[i]);
 305                 printk("\n");
 306         }
 307         schedule_work(&instance->poll_work);
 308
 309  exit:
 310         rmb();
 311         if (!instance->int_urb)
 312                 return;
 313
 314         ret = usb_submit_urb(urb, GFP_ATOMIC);
 315         if (ret)
 316                 err("%s - usb_submit_urb failed with result %d", __func__, ret);
 317 }
 318
 319 static int speedtch_get_status(struct speedtch_instance_data *instance,
 320                                unsigned char *buf)
 321 {
 322         struct usb_device *dev = instance->u.usb_dev;
 323         int ret;
 324
 325         memset(buf, 0, TOTAL);
 326
 327         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 328                               0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
 329                               CTRL_TIMEOUT);
 330         if (ret < 0) {
 331                 dbg("MSG 7 failed");
 332                 return ret;
 333         }
 334
 335         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 336                               0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
 337                               CTRL_TIMEOUT);
 338         if (ret < 0) {
 339                 dbg("MSG B failed");
 340                 return ret;
 341         }
 342
 343         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 344                               0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
 345                               CTRL_TIMEOUT);
 346         if (ret < 0) {
 347                 dbg("MSG D failed");
 348                 return ret;
 349         }
 350
 351         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 352                               0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
 353                               CTRL_TIMEOUT);
 354         if (ret < 0) {
 355                 dbg("MSG E failed");
 356                 return ret;
 357         }
 358
 359         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 360                               0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
 361                               CTRL_TIMEOUT);
 362         if (ret < 0) {
 363                 dbg("MSG F failed");
 364                 return ret;
 365         }
 366
 367         return 0;
 368 }
 369
 370 static void speedtch_poll_status(struct speedtch_instance_data *instance)
 371 {
 372         unsigned char buf[TOTAL];
 373         int ret;
 374
 375         ret = speedtch_get_status(instance, buf);
 376         if (ret) {
 377                 printk(KERN_WARNING
 378                        "SpeedTouch: Error %d fetching device status\n", ret);
 379                 return;
 380         }
 381
 382         dbg("Line state %02x", buf[OFFSET_7]);
 383
 384         switch (buf[OFFSET_7]) {
 385         case 0:
 386                 if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) {
 387                         instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
 388                         printk(KERN_NOTICE "ADSL line is down\n");
 389                 }
 390                 break;
 391
 392         case 0x08:
 393                 if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) {
 394                         instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 395                         printk(KERN_NOTICE "ADSL line is blocked?\n");
 396                 }
 397                 break;
 398
 399         case 0x10:
 400                 if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) {
 401                         instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
 402                         printk(KERN_NOTICE "ADSL line is synchronising\n");
 403                 }
 404                 break;
 405
 406         case 0x20:
 407                 if (instance->u.atm_dev->signal != ATM_PHY_SIG_FOUND) {
 408                         int down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
 409                                 | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
 410                         int up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
 411                                 | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
 412
 413                         if (!(down_speed & 0x0000ffff) &&
 414                             !(up_speed & 0x0000ffff)) {
 415                                 down_speed >>= 16;
 416                                 up_speed >>= 16;
 417                         }
 418                         instance->u.atm_dev->link_rate = down_speed * 1000 / 424;
 419                         instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND;
 420
 421                         printk(KERN_NOTICE
 422                                "ADSL line is up (%d Kib/s down | %d Kib/s up)\n",
 423                                down_speed, up_speed);
 424                 }
 425                 break;
 426
 427         default:
 428                 if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) {
 429                         instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 430                         printk(KERN_NOTICE "Unknown line state %02x\n", buf[OFFSET_7]);
 431                 }
 432                 break;
 433         }
 434 }
 435
 436 static void speedtch_timer_poll(unsigned long data)
 437 {
 438         struct speedtch_instance_data *instance = (void *)data;
 439
 440         schedule_work(&instance->poll_work);
 441         mod_timer(&instance->poll_timer, jiffies + (5 * HZ));
 442 }
 443
 444 #ifdef USE_FW_LOADER
 445 static void speedtch_upload_firmware(struct speedtch_instance_data *instance,
 446                                      const struct firmware *fw1,
 447                                      const struct firmware *fw2)
 448 {
 449         unsigned char *buffer;
 450         struct usb_device *usb_dev = instance->u.usb_dev;
 451         struct usb_interface *intf;
 452         int actual_length, ret;
 453         int offset;
 454
 455         dbg("speedtch_upload_firmware");
 456
 457         if (!(intf = usb_ifnum_to_if(usb_dev, 2))) {
 458                 dbg("speedtch_upload_firmware: interface not found!");
 459                 goto fail;
 460         }
 461
 462         if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
 463                 dbg("speedtch_upload_firmware: no memory for buffer!");
 464                 goto fail;
 465         }
 466
 467         /* A user-space firmware loader may already have claimed interface #2 */
 468         if ((ret =
 469              usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) < 0) {
 470                 dbg("speedtch_upload_firmware: interface in use (%d)!", ret);
 471                 goto fail_free;
 472         }
 473
 474         /* URB 7 */
 475         if (dl_512_first) {     /* some modems need a read before writing the firmware */
 476                 ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
 477                                    buffer, 0x200, &actual_length, 2000);
 478
 479                 if (ret < 0 && ret != -ETIMEDOUT)
 480                         dbg("speedtch_upload_firmware: read BLOCK0 from modem failed (%d)!", ret);
 481                 else
 482                         dbg("speedtch_upload_firmware: BLOCK0 downloaded (%d bytes)", ret);
 483         }
 484
 485         /* URB 8 : both leds are static green */
 486         for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
 487                 int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
 488                 memcpy(buffer, fw1->data + offset, thislen);
 489
 490                 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
 491                                    buffer, thislen, &actual_length, DATA_TIMEOUT);
 492
 493                 if (ret < 0) {
 494                         dbg("speedtch_upload_firmware: write BLOCK1 to modem failed (%d)!", ret);
 495                         goto fail_release;
 496                 }
 497                 dbg("speedtch_upload_firmware: BLOCK1 uploaded (%zu bytes)", fw1->size);
 498         }
 499
 500         /* USB led blinking green, ADSL led off */
 501
 502         /* URB 11 */
 503         ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
 504                            buffer, 0x200, &actual_length, DATA_TIMEOUT);
 505
 506         if (ret < 0) {
 507                 dbg("speedtch_upload_firmware: read BLOCK2 from modem failed (%d)!", ret);
 508                 goto fail_release;
 509         }
 510         dbg("speedtch_upload_firmware: BLOCK2 downloaded (%d bytes)", actual_length);
 511
 512         /* URBs 12 to 139 - USB led blinking green, ADSL led off */
 513         for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
 514                 int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
 515                 memcpy(buffer, fw2->data + offset, thislen);
 516
 517                 ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
 518                                    buffer, thislen, &actual_length, DATA_TIMEOUT);
 519
 520                 if (ret < 0) {
 521                         dbg("speedtch_upload_firmware: write BLOCK3 to modem failed (%d)!", ret);
 522                         goto fail_release;
 523                 }
 524         }
 525         dbg("speedtch_upload_firmware: BLOCK3 uploaded (%zu bytes)", fw2->size);
 526
 527         /* USB led static green, ADSL led static red */
 528
 529         /* URB 142 */
 530         ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
 531                            buffer, 0x200, &actual_length, DATA_TIMEOUT);
 532
 533         if (ret < 0) {
 534                 dbg("speedtch_upload_firmware: read BLOCK4 from modem failed (%d)!", ret);
 535                 goto fail_release;
 536         }
 537
 538         /* success */
 539         dbg("speedtch_upload_firmware: BLOCK4 downloaded (%d bytes)", actual_length);
 540
 541         /* Delay to allow firmware to start up. We can do this here
 542            because we're in our own kernel thread anyway. */
 543         msleep(1000);
 544
 545         /* Enable software buffering, if requested */
 546         if (sw_buffering)
 547                 speedtch_set_swbuff(instance, 1);
 548
 549         /* Magic spell; don't ask us what this does */
 550         speedtch_test_sequence(instance);
 551
 552         /* Start modem synchronisation */
 553         if (speedtch_start_synchro(instance))
 554                 dbg("speedtch_start_synchro: failed");
 555
 556         speedtch_got_firmware(instance, 1);
 557
 558         free_page((unsigned long)buffer);
 559         return;
 560
 561  fail_release:
 562         /* Only release interface #2 if uploading failed; we don't release it
 563            we succeeded.  This prevents the userspace tools from trying to load
 564            the firmware themselves */
 565         usb_driver_release_interface(&speedtch_usb_driver, intf);
 566  fail_free:
 567         free_page((unsigned long)buffer);
 568  fail:
 569         speedtch_got_firmware(instance, 0);
 570 }
 571
 572 static int speedtch_find_firmware(struct speedtch_instance_data
 573                                   *instance, int phase,
 574                                   const struct firmware **fw_p)
 575 {
 576         char buf[24];
 577         const u16 bcdDevice = le16_to_cpu(instance->u.usb_dev->descriptor.bcdDevice);
 578         const u8 major_revision = bcdDevice >> 8;
 579         const u8 minor_revision = bcdDevice & 0xff;
 580
 581         sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
 582         dbg("speedtch_find_firmware: looking for %s", buf);
 583
 584         if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
 585                 sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
 586                 dbg("speedtch_find_firmware: looking for %s", buf);
 587
 588                 if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
 589                         sprintf(buf, "speedtch-%d.bin", phase);
 590                         dbg("speedtch_find_firmware: looking for %s", buf);
 591
 592                         if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
 593                                 dev_warn(&instance->u.usb_dev->dev, "no stage %d firmware found!", phase);
 594                                 return -ENOENT;
 595                         }
 596                 }
 597         }
 598
 599         dev_info(&instance->u.usb_dev->dev, "found stage %d firmware %s\n", phase, buf);
 600
 601         return 0;
 602 }
 603
 604 static int speedtch_load_firmware(void *arg)
 605 {
 606         const struct firmware *fw1, *fw2;
 607         struct speedtch_instance_data *instance = arg;
 608
 609         BUG_ON(!instance);
 610
 611         daemonize("firmware/speedtch");
 612
 613         if (!speedtch_find_firmware(instance, 1, &fw1)) {
 614                 if (!speedtch_find_firmware(instance, 2, &fw2)) {
 615                         speedtch_upload_firmware(instance, fw1, fw2);
 616                         release_firmware(fw2);
 617                 }
 618                 release_firmware(fw1);
 619         }
 620
 621         /* In case we failed, set state back to NO_FIRMWARE so that
 622            another later attempt may work. Otherwise, we never actually
 623            manage to recover if, for example, the firmware is on /usr and
 624            we look for it too early. */
 625         speedtch_got_firmware(instance, 0);
 626
 627         module_put(THIS_MODULE);
 628         udsl_put_instance(&instance->u);
 629         return 0;
 630 }
 631 #endif /* USE_FW_LOADER */
 632
 633 static void speedtch_firmware_start(struct speedtch_instance_data *instance)
 634 {
 635 #ifdef USE_FW_LOADER
 636         int ret;
 637 #endif
 638
 639         dbg("speedtch_firmware_start");
 640
 641         down(&instance->u.serialize);   /* vs self, speedtch_got_firmware */
 642
 643         if (instance->u.status >= UDSL_LOADING_FIRMWARE) {
 644                 up(&instance->u.serialize);
 645                 return;
 646         }
 647
 648         instance->u.status = UDSL_LOADING_FIRMWARE;
 649         up(&instance->u.serialize);
 650
 651 #ifdef USE_FW_LOADER
 652         udsl_get_instance(&instance->u);
 653         try_module_get(THIS_MODULE);
 654
 655         ret = kernel_thread(speedtch_load_firmware, instance,
 656                             CLONE_FS | CLONE_FILES);
 657
 658         if (ret >= 0)
 659                 return;         /* OK */
 660
 661         dbg("speedtch_firmware_start: kernel_thread failed (%d)!", ret);
 662
 663         module_put(THIS_MODULE);
 664         udsl_put_instance(&instance->u);
 665         /* Just pretend it never happened... hope modem_run happens */
 666 #endif                          /* USE_FW_LOADER */
 667
 668         speedtch_got_firmware(instance, 0);
 669 }
 670
 671 static int speedtch_firmware_wait(struct udsl_instance_data *instance)
 672 {
 673         speedtch_firmware_start((void *)instance);
 674
 675         if (wait_event_interruptible(instance->firmware_waiters, instance->status != UDSL_LOADING_FIRMWARE) < 0)
 676                 return -ERESTARTSYS;
 677
 678         return (instance->status == UDSL_LOADED_FIRMWARE) ? 0 : -EAGAIN;
 679 }
 680
 681 /**********
 682 **  USB  **
 683 **********/
 684
 685 static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code,
 686                               void *user_data)
 687 {
 688         struct speedtch_instance_data *instance = usb_get_intfdata(intf);
 689
 690         dbg("speedtch_usb_ioctl entered");
 691
 692         if (!instance) {
 693                 dbg("speedtch_usb_ioctl: NULL instance!");
 694                 return -ENODEV;
 695         }
 696
 697         switch (code) {
 698         case UDSL_IOCTL_LINE_UP:
 699                 instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND;
 700                 speedtch_got_firmware(instance, 1);
 701                 return (instance->u.status == UDSL_LOADED_FIRMWARE) ? 0 : -EIO;
 702         case UDSL_IOCTL_LINE_DOWN:
 703                 instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
 704                 return 0;
 705         default:
 706                 return -ENOTTY;
 707         }
 708 }
 709
 710 static int speedtch_usb_probe(struct usb_interface *intf,
 711                               const struct usb_device_id *id)
 712 {
 713         struct usb_device *dev = interface_to_usbdev(intf);
 714         int ifnum = intf->altsetting->desc.bInterfaceNumber;
 715         struct speedtch_instance_data *instance;
 716         unsigned char mac_str[13];
 717         int ret, i;
 718         char buf7[SIZE_7];
 719
 720         dbg("speedtch_usb_probe: trying device with vendor=0x%x, product=0x%x, ifnum %d",
 721             le16_to_cpu(dev->descriptor.idVendor),
 722             le16_to_cpu(dev->descriptor.idProduct), ifnum);
 723
 724         if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) ||
 725             (ifnum != 1))
 726                 return -ENODEV;
 727
 728         dbg("speedtch_usb_probe: device accepted");
 729
 730         /* instance init */
 731         instance = kmalloc(sizeof(*instance), GFP_KERNEL);
 732         if (!instance) {
 733                 dbg("speedtch_usb_probe: no memory for instance data!");
 734                 return -ENOMEM;
 735         }
 736
 737         memset(instance, 0, sizeof(struct speedtch_instance_data));
 738
 739         if ((ret = usb_set_interface(dev, 0, 0)) < 0)
 740                 goto fail;
 741
 742         if ((ret = usb_set_interface(dev, 2, 0)) < 0)
 743                 goto fail;
 744
 745         instance->u.data_endpoint = SPEEDTCH_ENDPOINT_DATA;
 746         instance->u.firmware_wait = speedtch_firmware_wait;
 747         instance->u.driver_name = speedtch_driver_name;
 748
 749         ret = udsl_instance_setup(dev, &instance->u);
 750         if (ret)
 751                 goto fail;
 752
 753         init_timer(&instance->poll_timer);
 754         instance->poll_timer.function = speedtch_timer_poll;
 755         instance->poll_timer.data = (unsigned long)instance;
 756
 757         INIT_WORK(&instance->poll_work, (void *)speedtch_poll_status, instance);
 758
 759         /* set MAC address, it is stored in the serial number */
 760         memset(instance->u.atm_dev->esi, 0, sizeof(instance->u.atm_dev->esi));
 761         if (usb_string(dev, dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
 762                 for (i = 0; i < 6; i++)
 763                         instance->u.atm_dev->esi[i] =
 764                                 (hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1]));
 765         }
 766
 767         /* First check whether the modem already seems to be alive */
 768         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 769                               0x12, 0xc0, 0x07, 0x00, buf7, SIZE_7, 500);
 770
 771         if (ret == SIZE_7) {
 772                 dbg("firmware appears to be already loaded");
 773                 speedtch_got_firmware(instance, 1);
 774                 speedtch_poll_status(instance);
 775         } else {
 776                 speedtch_firmware_start(instance);
 777         }
 778
 779         usb_set_intfdata(intf, instance);
 780
 781         return 0;
 782
 783  fail:
 784         kfree(instance);
 785
 786         return -ENOMEM;
 787 }
 788
 789 static void speedtch_usb_disconnect(struct usb_interface *intf)
 790 {
 791         struct speedtch_instance_data *instance = usb_get_intfdata(intf);
 792
 793         dbg("speedtch_usb_disconnect entered");
 794
 795         if (!instance) {
 796                 dbg("speedtch_usb_disconnect: NULL instance!");
 797                 return;
 798         }
 799
 800 /*QQ need to handle disconnects on interface #2 while uploading firmware */
 801 /*QQ and what about interface #1? */
 802
 803         if (instance->int_urb) {
 804                 struct urb *int_urb = instance->int_urb;
 805                 instance->int_urb = NULL;
 806                 wmb();
 807                 usb_unlink_urb(int_urb);
 808                 usb_free_urb(int_urb);
 809         }
 810
 811         instance->int_data[0] = 1;
 812         del_timer_sync(&instance->poll_timer);
 813         wmb();
 814         flush_scheduled_work();
 815
 816         udsl_instance_disconnect(&instance->u);
 817
 818         /* clean up */
 819         usb_set_intfdata(intf, NULL);
 820         udsl_put_instance(&instance->u);
 821 }
 822
 823 /***********
 824 **  init  **
 825 ***********/
 826
 827 static int __init speedtch_usb_init(void)
 828 {
 829         dbg("speedtch_usb_init: driver version " DRIVER_VERSION);
 830
 831         return usb_register(&speedtch_usb_driver);
 832 }
 833
 834 static void __exit speedtch_usb_cleanup(void)
 835 {
 836         dbg("speedtch_usb_cleanup entered");
 837
 838         usb_deregister(&speedtch_usb_driver);
 839 }
 840
 841 module_init(speedtch_usb_init);
 842 module_exit(speedtch_usb_cleanup);
 843
 844 MODULE_AUTHOR(DRIVER_AUTHOR);
 845 MODULE_DESCRIPTION(DRIVER_DESC);
 846 MODULE_LICENSE("GPL");
 847 MODULE_VERSION(DRIVER_VERSION);