drivers/staging/line6/driver.c

   1 /*
   2  * Line6 Linux USB driver - 0.9.1beta
   3  *
   4  * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
   5  *
   6  *      This program is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU General Public License as
   8  *      published by the Free Software Foundation, version 2.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/usb.h>
  16
  17 #include "audio.h"
  18 #include "capture.h"
  19 #include "control.h"
  20 #include "driver.h"
  21 #include "midi.h"
  22 #include "playback.h"
  23 #include "pod.h"
  24 #include "podhd.h"
  25 #include "revision.h"
  26 #include "toneport.h"
  27 #include "usbdefs.h"
  28 #include "variax.h"
  29
  30 #define DRIVER_AUTHOR  "Markus Grabner <grabner@icg.tugraz.at>"
  31 #define DRIVER_DESC    "Line6 USB Driver"
  32 #define DRIVER_VERSION "0.9.1beta" DRIVER_REVISION
  33
  34 /* table of devices that work with this driver */
  35 static const struct usb_device_id line6_id_table[] = {
  36         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXT)},
  37         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXTLIVE)},
  38         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXTPRO)},
  39         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_GUITARPORT)},
  40         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_POCKETPOD)},
  41         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODHD300)},
  42         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODHD500)},
  43         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODSTUDIO_GX)},
  44         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODSTUDIO_UX1)},
  45         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODSTUDIO_UX2)},
  46         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODX3)},
  47         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODX3LIVE)},
  48         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXT)},
  49         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXTLIVE)},
  50         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXTPRO)},
  51         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_GX)},
  52         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_UX1)},
  53         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_UX2)},
  54         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_VARIAX)},
  55         {},
  56 };
  57
  58 MODULE_DEVICE_TABLE(usb, line6_id_table);
  59
  60 /* *INDENT-OFF* */
  61 static struct line6_properties line6_properties_table[] = {
  62         { LINE6_BIT_BASSPODXT,     "BassPODxt",     "BassPODxt",        LINE6_BIT_CONTROL_PCM_HWMON },
  63         { LINE6_BIT_BASSPODXTLIVE, "BassPODxtLive", "BassPODxt Live",   LINE6_BIT_CONTROL_PCM_HWMON },
  64         { LINE6_BIT_BASSPODXTPRO,  "BassPODxtPro",  "BassPODxt Pro",    LINE6_BIT_CONTROL_PCM_HWMON },
  65         { LINE6_BIT_GUITARPORT,    "GuitarPort",    "GuitarPort",       LINE6_BIT_PCM               },
  66         { LINE6_BIT_POCKETPOD,     "PocketPOD",     "Pocket POD",       LINE6_BIT_CONTROL           },
  67         { LINE6_BIT_PODHD300,      "PODHD300",      "POD HD300",        LINE6_BIT_CONTROL_PCM_HWMON },
  68         { LINE6_BIT_PODHD500,      "PODHD500",      "POD HD500",        LINE6_BIT_CONTROL_PCM_HWMON },
  69         { LINE6_BIT_PODSTUDIO_GX,  "PODStudioGX",   "POD Studio GX",    LINE6_BIT_PCM               },
  70         { LINE6_BIT_PODSTUDIO_UX1, "PODStudioUX1",  "POD Studio UX1",   LINE6_BIT_PCM               },
  71         { LINE6_BIT_PODSTUDIO_UX2, "PODStudioUX2",  "POD Studio UX2",   LINE6_BIT_PCM               },
  72         { LINE6_BIT_PODX3,         "PODX3",         "POD X3",           LINE6_BIT_PCM               },
  73         { LINE6_BIT_PODX3LIVE,     "PODX3Live",     "POD X3 Live",      LINE6_BIT_PCM               },
  74         { LINE6_BIT_PODXT,         "PODxt",         "PODxt",            LINE6_BIT_CONTROL_PCM_HWMON },
  75         { LINE6_BIT_PODXTLIVE,     "PODxtLive",     "PODxt Live",       LINE6_BIT_CONTROL_PCM_HWMON },
  76         { LINE6_BIT_PODXTPRO,      "PODxtPro",      "PODxt Pro",        LINE6_BIT_CONTROL_PCM_HWMON },
  77         { LINE6_BIT_TONEPORT_GX,   "TonePortGX",    "TonePort GX",      LINE6_BIT_PCM               },
  78         { LINE6_BIT_TONEPORT_UX1,  "TonePortUX1",   "TonePort UX1",     LINE6_BIT_PCM               },
  79         { LINE6_BIT_TONEPORT_UX2,  "TonePortUX2",   "TonePort UX2",     LINE6_BIT_PCM               },
  80         { LINE6_BIT_VARIAX,        "Variax",        "Variax Workbench", LINE6_BIT_CONTROL           },
  81 };
  82 /* *INDENT-ON* */
  83
  84 /*
  85         This is Line6's MIDI manufacturer ID.
  86 */
  87 const unsigned char line6_midi_id[] = {
  88         0x00, 0x01, 0x0c
  89 };
  90
  91 /*
  92         Code to request version of POD, Variax interface
  93         (and maybe other devices).
  94 */
  95 static const char line6_request_version0[] = {
  96         0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7
  97 };
  98
  99 /*
 100         Copy of version request code with GFP_KERNEL flag for use in URB.
 101 */
 102 static const char *line6_request_version;
 103
 104 struct usb_line6 *line6_devices[LINE6_MAX_DEVICES];
 105
 106 /**
 107          Class for asynchronous messages.
 108 */
 109 struct message {
 110         struct usb_line6 *line6;
 111         const char *buffer;
 112         int size;
 113         int done;
 114 };
 115
 116 /*
 117         Forward declarations.
 118 */
 119 static void line6_data_received(struct urb *urb);
 120 static int line6_send_raw_message_async_part(struct message *msg,
 121                                              struct urb *urb);
 122
 123 /*
 124         Start to listen on endpoint.
 125 */
 126 static int line6_start_listen(struct usb_line6 *line6)
 127 {
 128         int err;
 129         usb_fill_int_urb(line6->urb_listen, line6->usbdev,
 130                          usb_rcvintpipe(line6->usbdev, line6->ep_control_read),
 131                          line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
 132                          line6_data_received, line6, line6->interval);
 133         line6->urb_listen->actual_length = 0;
 134         err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC);
 135         return err;
 136 }
 137
 138 /*
 139         Stop listening on endpoint.
 140 */
 141 static void line6_stop_listen(struct usb_line6 *line6)
 142 {
 143         usb_kill_urb(line6->urb_listen);
 144 }
 145
 146 #ifdef CONFIG_LINE6_USB_DUMP_ANY
 147 /*
 148         Write hexdump to syslog.
 149 */
 150 void line6_write_hexdump(struct usb_line6 *line6, char dir,
 151                          const unsigned char *buffer, int size)
 152 {
 153         static const int BYTES_PER_LINE = 8;
 154         char hexdump[100];
 155         char asc[BYTES_PER_LINE + 1];
 156         int i, j;
 157
 158         for (i = 0; i < size; i += BYTES_PER_LINE) {
 159                 int hexdumpsize = sizeof(hexdump);
 160                 char *p = hexdump;
 161                 int n = min(size - i, BYTES_PER_LINE);
 162                 asc[n] = 0;
 163
 164                 for (j = 0; j < BYTES_PER_LINE; ++j) {
 165                         int bytes;
 166
 167                         if (j < n) {
 168                                 unsigned char val = buffer[i + j];
 169                                 bytes = snprintf(p, hexdumpsize, " %02X", val);
 170                                 asc[j] = ((val >= 0x20)
 171                                           && (val < 0x7f)) ? val : '.';
 172                         } else
 173                                 bytes = snprintf(p, hexdumpsize, "   ");
 174
 175                         if (bytes > hexdumpsize)
 176                                 break;  /* buffer overflow */
 177
 178                         p += bytes;
 179                         hexdumpsize -= bytes;
 180                 }
 181
 182                 dev_info(line6->ifcdev, "%c%04X:%s %s\n", dir, i, hexdump, asc);
 183         }
 184 }
 185 #endif
 186
 187 #ifdef CONFIG_LINE6_USB_DUMP_CTRL
 188 /*
 189         Dump URB data to syslog.
 190 */
 191 static void line6_dump_urb(struct urb *urb)
 192 {
 193         struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
 194
 195         if (urb->status < 0)
 196                 return;
 197
 198         line6_write_hexdump(line6, 'R', (unsigned char *)urb->transfer_buffer,
 199                             urb->actual_length);
 200 }
 201 #endif
 202
 203 /*
 204         Send raw message in pieces of wMaxPacketSize bytes.
 205 */
 206 int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
 207                            int size)
 208 {
 209         int i, done = 0;
 210
 211 #ifdef CONFIG_LINE6_USB_DUMP_CTRL
 212         line6_write_hexdump(line6, 'S', buffer, size);
 213 #endif
 214
 215         for (i = 0; i < size; i += line6->max_packet_size) {
 216                 int partial;
 217                 const char *frag_buf = buffer + i;
 218                 int frag_size = min(line6->max_packet_size, size - i);
 219                 int retval;
 220
 221                 retval = usb_interrupt_msg(line6->usbdev,
 222                                            usb_sndintpipe(line6->usbdev,
 223                                                           line6->ep_control_write),
 224                                            (char *)frag_buf, frag_size,
 225                                            &partial, LINE6_TIMEOUT * HZ);
 226
 227                 if (retval) {
 228                         dev_err(line6->ifcdev,
 229                                 "usb_interrupt_msg failed (%d)\n", retval);
 230                         break;
 231                 }
 232
 233                 done += frag_size;
 234         }
 235
 236         return done;
 237 }
 238
 239 /*
 240         Notification of completion of asynchronous request transmission.
 241 */
 242 static void line6_async_request_sent(struct urb *urb)
 243 {
 244         struct message *msg = (struct message *)urb->context;
 245
 246         if (msg->done >= msg->size) {
 247                 usb_free_urb(urb);
 248                 kfree(msg);
 249         } else
 250                 line6_send_raw_message_async_part(msg, urb);
 251 }
 252
 253 /*
 254         Asynchronously send part of a raw message.
 255 */
 256 static int line6_send_raw_message_async_part(struct message *msg,
 257                                              struct urb *urb)
 258 {
 259         int retval;
 260         struct usb_line6 *line6 = msg->line6;
 261         int done = msg->done;
 262         int bytes = min(msg->size - done, line6->max_packet_size);
 263
 264         usb_fill_int_urb(urb, line6->usbdev,
 265                          usb_sndintpipe(line6->usbdev, line6->ep_control_write),
 266                          (char *)msg->buffer + done, bytes,
 267                          line6_async_request_sent, msg, line6->interval);
 268
 269 #ifdef CONFIG_LINE6_USB_DUMP_CTRL
 270         line6_write_hexdump(line6, 'S', (char *)msg->buffer + done, bytes);
 271 #endif
 272
 273         msg->done += bytes;
 274         retval = usb_submit_urb(urb, GFP_ATOMIC);
 275
 276         if (retval < 0) {
 277                 dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n",
 278                         __func__, retval);
 279                 usb_free_urb(urb);
 280                 kfree(msg);
 281                 return -EINVAL;
 282         }
 283
 284         return 0;
 285 }
 286
 287 /*
 288         Setup and start timer.
 289 */
 290 void line6_start_timer(struct timer_list *timer, unsigned int msecs,
 291                        void (*function) (unsigned long), unsigned long data)
 292 {
 293         setup_timer(timer, function, data);
 294         timer->expires = jiffies + msecs * HZ / 1000;
 295         add_timer(timer);
 296 }
 297
 298 /*
 299         Asynchronously send raw message.
 300 */
 301 int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer,
 302                                  int size)
 303 {
 304         struct message *msg;
 305         struct urb *urb;
 306
 307         /* create message: */
 308         msg = kmalloc(sizeof(struct message), GFP_ATOMIC);
 309
 310         if (msg == NULL) {
 311                 dev_err(line6->ifcdev, "Out of memory\n");
 312                 return -ENOMEM;
 313         }
 314
 315         /* create URB: */
 316         urb = usb_alloc_urb(0, GFP_ATOMIC);
 317
 318         if (urb == NULL) {
 319                 kfree(msg);
 320                 dev_err(line6->ifcdev, "Out of memory\n");
 321                 return -ENOMEM;
 322         }
 323
 324         /* set message data: */
 325         msg->line6 = line6;
 326         msg->buffer = buffer;
 327         msg->size = size;
 328         msg->done = 0;
 329
 330         /* start sending: */
 331         return line6_send_raw_message_async_part(msg, urb);
 332 }
 333
 334 /*
 335         Send asynchronous device version request.
 336 */
 337 int line6_version_request_async(struct usb_line6 *line6)
 338 {
 339         return line6_send_raw_message_async(line6, line6_request_version,
 340                                             sizeof(line6_request_version0));
 341 }
 342
 343 /*
 344         Send sysex message in pieces of wMaxPacketSize bytes.
 345 */
 346 int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer,
 347                              int size)
 348 {
 349         return line6_send_raw_message(line6, buffer,
 350                                       size + SYSEX_EXTRA_SIZE) -
 351             SYSEX_EXTRA_SIZE;
 352 }
 353
 354 /*
 355         Send sysex message in pieces of wMaxPacketSize bytes.
 356 */
 357 int line6_send_sysex_message_async(struct usb_line6 *line6, const char *buffer,
 358                                    int size)
 359 {
 360         return line6_send_raw_message_async(line6, buffer,
 361                                             size + SYSEX_EXTRA_SIZE) -
 362             SYSEX_EXTRA_SIZE;
 363 }
 364
 365 /*
 366         Allocate buffer for sysex message and prepare header.
 367         @param code sysex message code
 368         @param size number of bytes between code and sysex end
 369 */
 370 char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2,
 371                                int size)
 372 {
 373         char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC);
 374
 375         if (!buffer) {
 376                 dev_err(line6->ifcdev, "out of memory\n");
 377                 return NULL;
 378         }
 379
 380         buffer[0] = LINE6_SYSEX_BEGIN;
 381         memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id));
 382         buffer[sizeof(line6_midi_id) + 1] = code1;
 383         buffer[sizeof(line6_midi_id) + 2] = code2;
 384         buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END;
 385         return buffer;
 386 }
 387
 388 /*
 389         Notification of data received from the Line6 device.
 390 */
 391 static void line6_data_received(struct urb *urb)
 392 {
 393         struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
 394         struct MidiBuffer *mb = &line6->line6midi->midibuf_in;
 395         int done;
 396
 397         if (urb->status == -ESHUTDOWN)
 398                 return;
 399
 400 #ifdef CONFIG_LINE6_USB_DUMP_CTRL
 401         line6_dump_urb(urb);
 402 #endif
 403
 404         done =
 405             line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
 406
 407         if (done < urb->actual_length) {
 408                 line6_midibuf_ignore(mb, done);
 409                 DEBUG_MESSAGES(dev_err
 410                                (line6->ifcdev,
 411                                 "%d %d buffer overflow - message skipped\n",
 412                                 done, urb->actual_length));
 413         }
 414
 415         for (;;) {
 416                 done =
 417                     line6_midibuf_read(mb, line6->buffer_message,
 418                                        LINE6_MESSAGE_MAXLEN);
 419
 420                 if (done == 0)
 421                         break;
 422
 423                 /* MIDI input filter */
 424                 if (line6_midibuf_skip_message
 425                     (mb, line6->line6midi->midi_mask_receive))
 426                         continue;
 427
 428                 line6->message_length = done;
 429 #ifdef CONFIG_LINE6_USB_DUMP_MIDI
 430                 line6_write_hexdump(line6, 'r', line6->buffer_message, done);
 431 #endif
 432                 line6_midi_receive(line6, line6->buffer_message, done);
 433
 434                 switch (line6->usbdev->descriptor.idProduct) {
 435                 case LINE6_DEVID_BASSPODXT:
 436                 case LINE6_DEVID_BASSPODXTLIVE:
 437                 case LINE6_DEVID_BASSPODXTPRO:
 438                 case LINE6_DEVID_PODXT:
 439                 case LINE6_DEVID_PODXTPRO:
 440                 case LINE6_DEVID_POCKETPOD:
 441                         line6_pod_process_message((struct usb_line6_pod *)
 442                                                   line6);
 443                         break;
 444
 445                 case LINE6_DEVID_PODHD300:
 446                 case LINE6_DEVID_PODHD500:
 447                         break; /* let userspace handle MIDI */
 448
 449                 case LINE6_DEVID_PODXTLIVE:
 450                         switch (line6->interface_number) {
 451                         case PODXTLIVE_INTERFACE_POD:
 452                                 line6_pod_process_message((struct usb_line6_pod
 453                                                            *)line6);
 454                                 break;
 455
 456                         case PODXTLIVE_INTERFACE_VARIAX:
 457                                 line6_variax_process_message((struct
 458                                                               usb_line6_variax
 459                                                               *)line6);
 460                                 break;
 461
 462                         default:
 463                                 dev_err(line6->ifcdev,
 464                                         "PODxt Live interface %d not supported\n",
 465                                         line6->interface_number);
 466                         }
 467                         break;
 468
 469                 case LINE6_DEVID_VARIAX:
 470                         line6_variax_process_message((struct usb_line6_variax *)
 471                                                      line6);
 472                         break;
 473
 474                 default:
 475                         MISSING_CASE;
 476                 }
 477         }
 478
 479         line6_start_listen(line6);
 480 }
 481
 482 /*
 483         Send channel number (i.e., switch to a different sound).
 484 */
 485 int line6_send_program(struct usb_line6 *line6, int value)
 486 {
 487         int retval;
 488         unsigned char *buffer;
 489         int partial;
 490
 491         buffer = kmalloc(2, GFP_KERNEL);
 492
 493         if (!buffer) {
 494                 dev_err(line6->ifcdev, "out of memory\n");
 495                 return -ENOMEM;
 496         }
 497
 498         buffer[0] = LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_HOST;
 499         buffer[1] = value;
 500
 501 #ifdef CONFIG_LINE6_USB_DUMP_CTRL
 502         line6_write_hexdump(line6, 'S', buffer, 2);
 503 #endif
 504
 505         retval = usb_interrupt_msg(line6->usbdev,
 506                                    usb_sndintpipe(line6->usbdev,
 507                                                   line6->ep_control_write),
 508                                    buffer, 2, &partial, LINE6_TIMEOUT * HZ);
 509
 510         if (retval)
 511                 dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n",
 512                         retval);
 513
 514         kfree(buffer);
 515         return retval;
 516 }
 517
 518 /*
 519         Transmit Line6 control parameter.
 520 */
 521 int line6_transmit_parameter(struct usb_line6 *line6, int param, int value)
 522 {
 523         int retval;
 524         unsigned char *buffer;
 525         int partial;
 526
 527         buffer = kmalloc(3, GFP_KERNEL);
 528
 529         if (!buffer) {
 530                 dev_err(line6->ifcdev, "out of memory\n");
 531                 return -ENOMEM;
 532         }
 533
 534         buffer[0] = LINE6_PARAM_CHANGE | LINE6_CHANNEL_HOST;
 535         buffer[1] = param;
 536         buffer[2] = value;
 537
 538 #ifdef CONFIG_LINE6_USB_DUMP_CTRL
 539         line6_write_hexdump(line6, 'S', buffer, 3);
 540 #endif
 541
 542         retval = usb_interrupt_msg(line6->usbdev,
 543                                    usb_sndintpipe(line6->usbdev,
 544                                                   line6->ep_control_write),
 545                                    buffer, 3, &partial, LINE6_TIMEOUT * HZ);
 546
 547         if (retval)
 548                 dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n",
 549                         retval);
 550
 551         kfree(buffer);
 552         return retval;
 553 }
 554
 555 /*
 556         Read data from device.
 557 */
 558 int line6_read_data(struct usb_line6 *line6, int address, void *data,
 559                     size_t datalen)
 560 {
 561         struct usb_device *usbdev = line6->usbdev;
 562         int ret;
 563         unsigned char len;
 564
 565         /* query the serial number: */
 566         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
 567                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
 568                               (datalen << 8) | 0x21, address,
 569                               NULL, 0, LINE6_TIMEOUT * HZ);
 570
 571         if (ret < 0) {
 572                 dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
 573                 return ret;
 574         }
 575
 576         /* Wait for data length. We'll get a couple of 0xff until length arrives. */
 577         do {
 578                 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
 579                                       USB_TYPE_VENDOR | USB_RECIP_DEVICE |
 580                                       USB_DIR_IN,
 581                                       0x0012, 0x0000, &len, 1,
 582                                       LINE6_TIMEOUT * HZ);
 583                 if (ret < 0) {
 584                         dev_err(line6->ifcdev,
 585                                 "receive length failed (error %d)\n", ret);
 586                         return ret;
 587                 }
 588         } while (len == 0xff);
 589
 590         if (len != datalen) {
 591                 /* should be equal or something went wrong */
 592                 dev_err(line6->ifcdev,
 593                         "length mismatch (expected %d, got %d)\n",
 594                         (int)datalen, (int)len);
 595                 return -EINVAL;
 596         }
 597
 598         /* receive the result: */
 599         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
 600                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 601                               0x0013, 0x0000, data, datalen,
 602                               LINE6_TIMEOUT * HZ);
 603
 604         if (ret < 0) {
 605                 dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
 606                 return ret;
 607         }
 608
 609         return 0;
 610 }
 611
 612 /*
 613         Write data to device.
 614 */
 615 int line6_write_data(struct usb_line6 *line6, int address, void *data,
 616                      size_t datalen)
 617 {
 618         struct usb_device *usbdev = line6->usbdev;
 619         int ret;
 620         unsigned char status;
 621
 622         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
 623                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
 624                               0x0022, address, data, datalen,
 625                               LINE6_TIMEOUT * HZ);
 626
 627         if (ret < 0) {
 628                 dev_err(line6->ifcdev,
 629                         "write request failed (error %d)\n", ret);
 630                 return ret;
 631         }
 632
 633         do {
 634                 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
 635                                       0x67,
 636                                       USB_TYPE_VENDOR | USB_RECIP_DEVICE |
 637                                       USB_DIR_IN,
 638                                       0x0012, 0x0000,
 639                                       &status, 1, LINE6_TIMEOUT * HZ);
 640
 641                 if (ret < 0) {
 642                         dev_err(line6->ifcdev,
 643                                 "receiving status failed (error %d)\n", ret);
 644                         return ret;
 645                 }
 646         } while (status == 0xff);
 647
 648         if (status != 0) {
 649                 dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
 650                 return -EINVAL;
 651         }
 652
 653         return 0;
 654 }
 655
 656 /*
 657         Read Line6 device serial number.
 658         (POD, TonePort, GuitarPort)
 659 */
 660 int line6_read_serial_number(struct usb_line6 *line6, int *serial_number)
 661 {
 662         return line6_read_data(line6, 0x80d0, serial_number,
 663                                sizeof(*serial_number));
 664 }
 665
 666 /*
 667         No operation (i.e., unsupported).
 668 */
 669 ssize_t line6_nop_read(struct device *dev, struct device_attribute *attr,
 670                        char *buf)
 671 {
 672         return 0;
 673 }
 674
 675 /*
 676         No operation (i.e., unsupported).
 677 */
 678 ssize_t line6_nop_write(struct device *dev, struct device_attribute *attr,
 679                         const char *buf, size_t count)
 680 {
 681         return count;
 682 }
 683
 684 /*
 685         "write" request on "raw" special file.
 686 */
 687 #ifdef CONFIG_LINE6_USB_RAW
 688 ssize_t line6_set_raw(struct device *dev, struct device_attribute *attr,
 689                       const char *buf, size_t count)
 690 {
 691         struct usb_interface *interface = to_usb_interface(dev);
 692         struct usb_line6 *line6 = usb_get_intfdata(interface);
 693         line6_send_raw_message(line6, buf, count);
 694         return count;
 695 }
 696 #endif
 697
 698 /*
 699         Generic destructor.
 700 */
 701 static void line6_destruct(struct usb_interface *interface)
 702 {
 703         struct usb_line6 *line6;
 704
 705         if (interface == NULL)
 706                 return;
 707         line6 = usb_get_intfdata(interface);
 708         if (line6 == NULL)
 709                 return;
 710
 711         /* free buffer memory first: */
 712         kfree(line6->buffer_message);
 713         kfree(line6->buffer_listen);
 714
 715         /* then free URBs: */
 716         usb_free_urb(line6->urb_listen);
 717
 718         /* make sure the device isn't destructed twice: */
 719         usb_set_intfdata(interface, NULL);
 720
 721         /* free interface data: */
 722         kfree(line6);
 723 }
 724
 725 /*
 726         Probe USB device.
 727 */
 728 static int line6_probe(struct usb_interface *interface,
 729                        const struct usb_device_id *id)
 730 {
 731         int devtype;
 732         struct usb_device *usbdev;
 733         struct usb_line6 *line6;
 734         const struct line6_properties *properties;
 735         int devnum;
 736         int interface_number, alternate = 0;
 737         int product;
 738         int size = 0;
 739         int ep_read = 0, ep_write = 0;
 740         int ret;
 741
 742         if (interface == NULL)
 743                 return -ENODEV;
 744         usbdev = interface_to_usbdev(interface);
 745         if (usbdev == NULL)
 746                 return -ENODEV;
 747
 748         /* we don't handle multiple configurations */
 749         if (usbdev->descriptor.bNumConfigurations != 1) {
 750                 ret = -ENODEV;
 751                 goto err_put;
 752         }
 753
 754         /* check vendor and product id */
 755         for (devtype = ARRAY_SIZE(line6_id_table) - 1; devtype--;) {
 756                 u16 idVendor = le16_to_cpu(usbdev->descriptor.idVendor);
 757                 u16 idProduct = le16_to_cpu(usbdev->descriptor.idProduct);
 758
 759                 if (idVendor == line6_id_table[devtype].idVendor &&
 760                     idProduct == line6_id_table[devtype].idProduct)
 761                         break;
 762         }
 763
 764         if (devtype < 0) {
 765                 ret = -ENODEV;
 766                 goto err_put;
 767         }
 768
 769         /* find free slot in device table: */
 770         for (devnum = 0; devnum < LINE6_MAX_DEVICES; ++devnum)
 771                 if (line6_devices[devnum] == NULL)
 772                         break;
 773
 774         if (devnum == LINE6_MAX_DEVICES) {
 775                 ret = -ENODEV;
 776                 goto err_put;
 777         }
 778
 779         /* initialize device info: */
 780         properties = &line6_properties_table[devtype];
 781         dev_info(&interface->dev, "Line6 %s found\n", properties->name);
 782         product = le16_to_cpu(usbdev->descriptor.idProduct);
 783
 784         /* query interface number */
 785         interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
 786
 787         switch (product) {
 788         case LINE6_DEVID_BASSPODXTLIVE:
 789         case LINE6_DEVID_PODXTLIVE:
 790         case LINE6_DEVID_VARIAX:
 791                 alternate = 1;
 792                 break;
 793
 794         case LINE6_DEVID_POCKETPOD:
 795                 switch (interface_number) {
 796                 case 0:
 797                         return 0;       /* this interface has no endpoints */
 798                 case 1:
 799                         alternate = 0;
 800                         break;
 801                 default:
 802                         MISSING_CASE;
 803                 }
 804                 break;
 805
 806         case LINE6_DEVID_PODHD500:
 807         case LINE6_DEVID_PODX3:
 808         case LINE6_DEVID_PODX3LIVE:
 809                 switch (interface_number) {
 810                 case 0:
 811                         alternate = 1;
 812                         break;
 813                 case 1:
 814                         alternate = 0;
 815                         break;
 816                 default:
 817                         MISSING_CASE;
 818                 }
 819                 break;
 820
 821         case LINE6_DEVID_BASSPODXT:
 822         case LINE6_DEVID_BASSPODXTPRO:
 823         case LINE6_DEVID_PODXT:
 824         case LINE6_DEVID_PODXTPRO:
 825         case LINE6_DEVID_PODHD300:
 826                 alternate = 5;
 827                 break;
 828
 829         case LINE6_DEVID_GUITARPORT:
 830         case LINE6_DEVID_PODSTUDIO_GX:
 831         case LINE6_DEVID_PODSTUDIO_UX1:
 832         case LINE6_DEVID_TONEPORT_GX:
 833         case LINE6_DEVID_TONEPORT_UX1:
 834                 alternate = 2;  /* 1..4 seem to be ok */
 835                 break;
 836
 837         case LINE6_DEVID_TONEPORT_UX2:
 838         case LINE6_DEVID_PODSTUDIO_UX2:
 839                 switch (interface_number) {
 840                 case 0:
 841                         /* defaults to 44.1kHz, 16-bit */
 842                         alternate = 2;
 843                         break;
 844                 case 1:
 845                         /* don't know yet what this is ...
 846                            alternate = 1;
 847                            break;
 848                          */
 849                         return -ENODEV;
 850                 default:
 851                         MISSING_CASE;
 852                 }
 853                 break;
 854
 855         default:
 856                 MISSING_CASE;
 857                 ret = -ENODEV;
 858                 goto err_put;
 859         }
 860
 861         ret = usb_set_interface(usbdev, interface_number, alternate);
 862         if (ret < 0) {
 863                 dev_err(&interface->dev, "set_interface failed\n");
 864                 goto err_put;
 865         }
 866
 867         /* initialize device data based on product id: */
 868         switch (product) {
 869         case LINE6_DEVID_BASSPODXT:
 870         case LINE6_DEVID_BASSPODXTLIVE:
 871         case LINE6_DEVID_BASSPODXTPRO:
 872         case LINE6_DEVID_PODXT:
 873         case LINE6_DEVID_PODXTPRO:
 874                 size = sizeof(struct usb_line6_pod);
 875                 ep_read = 0x84;
 876                 ep_write = 0x03;
 877                 break;
 878
 879         case LINE6_DEVID_PODHD300:
 880                 size = sizeof(struct usb_line6_podhd);
 881                 ep_read = 0x84;
 882                 ep_write = 0x03;
 883                 break;
 884
 885         case LINE6_DEVID_PODHD500:
 886                 size = sizeof(struct usb_line6_podhd);
 887                 ep_read = 0x81;
 888                 ep_write = 0x01;
 889                 break;
 890
 891         case LINE6_DEVID_POCKETPOD:
 892                 size = sizeof(struct usb_line6_pod);
 893                 ep_read = 0x82;
 894                 ep_write = 0x02;
 895                 break;
 896
 897         case LINE6_DEVID_PODX3:
 898         case LINE6_DEVID_PODX3LIVE:
 899                 /* currently unused! */
 900                 size = sizeof(struct usb_line6_pod);
 901                 ep_read = 0x81;
 902                 ep_write = 0x01;
 903                 break;
 904
 905         case LINE6_DEVID_PODSTUDIO_GX:
 906         case LINE6_DEVID_PODSTUDIO_UX1:
 907         case LINE6_DEVID_PODSTUDIO_UX2:
 908         case LINE6_DEVID_TONEPORT_GX:
 909         case LINE6_DEVID_TONEPORT_UX1:
 910         case LINE6_DEVID_TONEPORT_UX2:
 911         case LINE6_DEVID_GUITARPORT:
 912                 size = sizeof(struct usb_line6_toneport);
 913                 /* these don't have a control channel */
 914                 break;
 915
 916         case LINE6_DEVID_PODXTLIVE:
 917                 switch (interface_number) {
 918                 case PODXTLIVE_INTERFACE_POD:
 919                         size = sizeof(struct usb_line6_pod);
 920                         ep_read = 0x84;
 921                         ep_write = 0x03;
 922                         break;
 923
 924                 case PODXTLIVE_INTERFACE_VARIAX:
 925                         size = sizeof(struct usb_line6_variax);
 926                         ep_read = 0x86;
 927                         ep_write = 0x05;
 928                         break;
 929
 930                 default:
 931                         ret = -ENODEV;
 932                         goto err_put;
 933                 }
 934                 break;
 935
 936         case LINE6_DEVID_VARIAX:
 937                 size = sizeof(struct usb_line6_variax);
 938                 ep_read = 0x82;
 939                 ep_write = 0x01;
 940                 break;
 941
 942         default:
 943                 MISSING_CASE;
 944                 ret = -ENODEV;
 945                 goto err_put;
 946         }
 947
 948         if (size == 0) {
 949                 dev_err(&interface->dev,
 950                         "driver bug: interface data size not set\n");
 951                 ret = -ENODEV;
 952                 goto err_put;
 953         }
 954
 955         line6 = kzalloc(size, GFP_KERNEL);
 956
 957         if (line6 == NULL) {
 958                 dev_err(&interface->dev, "Out of memory\n");
 959                 ret = -ENODEV;
 960                 goto err_put;
 961         }
 962
 963         /* store basic data: */
 964         line6->interface_number = interface_number;
 965         line6->properties = properties;
 966         line6->usbdev = usbdev;
 967         line6->ifcdev = &interface->dev;
 968         line6->ep_control_read = ep_read;
 969         line6->ep_control_write = ep_write;
 970         line6->product = product;
 971
 972         /* get data from endpoint descriptor (see usb_maxpacket): */
 973         {
 974                 struct usb_host_endpoint *ep;
 975                 unsigned epnum =
 976                     usb_pipeendpoint(usb_rcvintpipe(usbdev, ep_read));
 977                 ep = usbdev->ep_in[epnum];
 978
 979                 if (ep != NULL) {
 980                         line6->interval = ep->desc.bInterval;
 981                         line6->max_packet_size =
 982                             le16_to_cpu(ep->desc.wMaxPacketSize);
 983                 } else {
 984                         line6->interval = LINE6_FALLBACK_INTERVAL;
 985                         line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE;
 986                         dev_err(line6->ifcdev,
 987                                 "endpoint not available, using fallback values");
 988                 }
 989         }
 990
 991         usb_set_intfdata(interface, line6);
 992
 993         if (properties->capabilities & LINE6_BIT_CONTROL) {
 994                 /* initialize USB buffers: */
 995                 line6->buffer_listen =
 996                     kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL);
 997
 998                 if (line6->buffer_listen == NULL) {
 999                         dev_err(&interface->dev, "Out of memory\n");
1000                         ret = -ENOMEM;
1001                         goto err_destruct;
1002                 }
1003
1004                 line6->buffer_message =
1005                     kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);
1006
1007                 if (line6->buffer_message == NULL) {
1008                         dev_err(&interface->dev, "Out of memory\n");
1009                         ret = -ENOMEM;
1010                         goto err_destruct;
1011                 }
1012
1013                 line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
1014
1015                 if (line6->urb_listen == NULL) {
1016                         dev_err(&interface->dev, "Out of memory\n");
1017                         line6_destruct(interface);
1018                         ret = -ENOMEM;
1019                         goto err_destruct;
1020                 }
1021
1022                 ret = line6_start_listen(line6);
1023                 if (ret < 0) {
1024                         dev_err(&interface->dev, "%s: usb_submit_urb failed\n",
1025                                 __func__);
1026                         goto err_destruct;
1027                 }
1028         }
1029
1030         /* initialize device data based on product id: */
1031         switch (product) {
1032         case LINE6_DEVID_BASSPODXT:
1033         case LINE6_DEVID_BASSPODXTLIVE:
1034         case LINE6_DEVID_BASSPODXTPRO:
1035         case LINE6_DEVID_POCKETPOD:
1036         case LINE6_DEVID_PODX3:
1037         case LINE6_DEVID_PODX3LIVE:
1038         case LINE6_DEVID_PODXT:
1039         case LINE6_DEVID_PODXTPRO:
1040                 ret = line6_pod_init(interface, (struct usb_line6_pod *)line6);
1041                 break;
1042
1043         case LINE6_DEVID_PODHD300:
1044         case LINE6_DEVID_PODHD500:
1045                 ret = line6_podhd_init(interface,
1046                                        (struct usb_line6_podhd *)line6);
1047                 break;
1048
1049         case LINE6_DEVID_PODXTLIVE:
1050                 switch (interface_number) {
1051                 case PODXTLIVE_INTERFACE_POD:
1052                         ret =
1053                             line6_pod_init(interface,
1054                                            (struct usb_line6_pod *)line6);
1055                         break;
1056
1057                 case PODXTLIVE_INTERFACE_VARIAX:
1058                         ret =
1059                             line6_variax_init(interface,
1060                                               (struct usb_line6_variax *)line6);
1061                         break;
1062
1063                 default:
1064                         dev_err(&interface->dev,
1065                                 "PODxt Live interface %d not supported\n",
1066                                 interface_number);
1067                         ret = -ENODEV;
1068                 }
1069
1070                 break;
1071
1072         case LINE6_DEVID_VARIAX:
1073                 ret =
1074                     line6_variax_init(interface,
1075                                       (struct usb_line6_variax *)line6);
1076                 break;
1077
1078         case LINE6_DEVID_PODSTUDIO_GX:
1079         case LINE6_DEVID_PODSTUDIO_UX1:
1080         case LINE6_DEVID_PODSTUDIO_UX2:
1081         case LINE6_DEVID_TONEPORT_GX:
1082         case LINE6_DEVID_TONEPORT_UX1:
1083         case LINE6_DEVID_TONEPORT_UX2:
1084         case LINE6_DEVID_GUITARPORT:
1085                 ret =
1086                     line6_toneport_init(interface,
1087                                         (struct usb_line6_toneport *)line6);
1088                 break;
1089
1090         default:
1091                 MISSING_CASE;
1092                 ret = -ENODEV;
1093         }
1094
1095         if (ret < 0)
1096                 goto err_destruct;
1097
1098         ret = sysfs_create_link(&interface->dev.kobj, &usbdev->dev.kobj,
1099                                 "usb_device");
1100         if (ret < 0)
1101                 goto err_destruct;
1102
1103         /* creation of additional special files should go here */
1104
1105         dev_info(&interface->dev, "Line6 %s now attached\n",
1106                  line6->properties->name);
1107         line6_devices[devnum] = line6;
1108
1109         switch (product) {
1110         case LINE6_DEVID_PODX3:
1111         case LINE6_DEVID_PODX3LIVE:
1112                 dev_info(&interface->dev,
1113                          "NOTE: the Line6 %s is detected, but not yet supported\n",
1114                          line6->properties->name);
1115         }
1116
1117         /* increment reference counters: */
1118         usb_get_intf(interface);
1119         usb_get_dev(usbdev);
1120
1121         return 0;
1122
1123 err_destruct:
1124         line6_destruct(interface);
1125 err_put:
1126         return ret;
1127 }
1128
1129 /*
1130         Line6 device disconnected.
1131 */
1132 static void line6_disconnect(struct usb_interface *interface)
1133 {
1134         struct usb_line6 *line6;
1135         struct usb_device *usbdev;
1136         int interface_number, i;
1137
1138         if (interface == NULL)
1139                 return;
1140         usbdev = interface_to_usbdev(interface);
1141         if (usbdev == NULL)
1142                 return;
1143
1144         /* removal of additional special files should go here */
1145
1146         sysfs_remove_link(&interface->dev.kobj, "usb_device");
1147
1148         interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
1149         line6 = usb_get_intfdata(interface);
1150
1151         if (line6 != NULL) {
1152                 if (line6->urb_listen != NULL)
1153                         line6_stop_listen(line6);
1154
1155                 if (usbdev != line6->usbdev)
1156                         dev_err(line6->ifcdev,
1157                                 "driver bug: inconsistent usb device\n");
1158
1159                 switch (line6->usbdev->descriptor.idProduct) {
1160                 case LINE6_DEVID_BASSPODXT:
1161                 case LINE6_DEVID_BASSPODXTLIVE:
1162                 case LINE6_DEVID_BASSPODXTPRO:
1163                 case LINE6_DEVID_POCKETPOD:
1164                 case LINE6_DEVID_PODX3:
1165                 case LINE6_DEVID_PODX3LIVE:
1166                 case LINE6_DEVID_PODXT:
1167                 case LINE6_DEVID_PODXTPRO:
1168                         line6_pod_disconnect(interface);
1169                         break;
1170
1171                 case LINE6_DEVID_PODHD300:
1172                 case LINE6_DEVID_PODHD500:
1173                         line6_podhd_disconnect(interface);
1174                         break;
1175
1176                 case LINE6_DEVID_PODXTLIVE:
1177                         switch (interface_number) {
1178                         case PODXTLIVE_INTERFACE_POD:
1179                                 line6_pod_disconnect(interface);
1180                                 break;
1181
1182                         case PODXTLIVE_INTERFACE_VARIAX:
1183                                 line6_variax_disconnect(interface);
1184                                 break;
1185                         }
1186
1187                         break;
1188
1189                 case LINE6_DEVID_VARIAX:
1190                         line6_variax_disconnect(interface);
1191                         break;
1192
1193                 case LINE6_DEVID_PODSTUDIO_GX:
1194                 case LINE6_DEVID_PODSTUDIO_UX1:
1195                 case LINE6_DEVID_PODSTUDIO_UX2:
1196                 case LINE6_DEVID_TONEPORT_GX:
1197                 case LINE6_DEVID_TONEPORT_UX1:
1198                 case LINE6_DEVID_TONEPORT_UX2:
1199                 case LINE6_DEVID_GUITARPORT:
1200                         line6_toneport_disconnect(interface);
1201                         break;
1202
1203                 default:
1204                         MISSING_CASE;
1205                 }
1206
1207                 dev_info(&interface->dev, "Line6 %s now disconnected\n",
1208                          line6->properties->name);
1209
1210                 for (i = LINE6_MAX_DEVICES; i--;)
1211                         if (line6_devices[i] == line6)
1212                                 line6_devices[i] = NULL;
1213         }
1214
1215         line6_destruct(interface);
1216
1217         /* decrement reference counters: */
1218         usb_put_intf(interface);
1219         usb_put_dev(usbdev);
1220 }
1221
1222 #ifdef CONFIG_PM
1223
1224 /*
1225         Suspend Line6 device.
1226 */
1227 static int line6_suspend(struct usb_interface *interface, pm_message_t message)
1228 {
1229         struct usb_line6 *line6 = usb_get_intfdata(interface);
1230         struct snd_line6_pcm *line6pcm = line6->line6pcm;
1231
1232         snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);
1233
1234         if (line6->properties->capabilities & LINE6_BIT_CONTROL)
1235                 line6_stop_listen(line6);
1236
1237         if (line6pcm != NULL) {
1238                 snd_pcm_suspend_all(line6pcm->pcm);
1239                 line6_pcm_disconnect(line6pcm);
1240                 line6pcm->flags = 0;
1241         }
1242
1243         return 0;
1244 }
1245
1246 /*
1247         Resume Line6 device.
1248 */
1249 static int line6_resume(struct usb_interface *interface)
1250 {
1251         struct usb_line6 *line6 = usb_get_intfdata(interface);
1252
1253         if (line6->properties->capabilities & LINE6_BIT_CONTROL)
1254                 line6_start_listen(line6);
1255
1256         snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);
1257         return 0;
1258 }
1259
1260 /*
1261         Resume Line6 device after reset.
1262 */
1263 static int line6_reset_resume(struct usb_interface *interface)
1264 {
1265         struct usb_line6 *line6 = usb_get_intfdata(interface);
1266
1267         switch (line6->usbdev->descriptor.idProduct) {
1268         case LINE6_DEVID_PODSTUDIO_GX:
1269         case LINE6_DEVID_PODSTUDIO_UX1:
1270         case LINE6_DEVID_PODSTUDIO_UX2:
1271         case LINE6_DEVID_TONEPORT_GX:
1272         case LINE6_DEVID_TONEPORT_UX1:
1273         case LINE6_DEVID_TONEPORT_UX2:
1274         case LINE6_DEVID_GUITARPORT:
1275                 line6_toneport_reset_resume((struct usb_line6_toneport *)line6);
1276         }
1277
1278         return line6_resume(interface);
1279 }
1280
1281 #endif /* CONFIG_PM */
1282
1283 static struct usb_driver line6_driver = {
1284         .name = DRIVER_NAME,
1285         .probe = line6_probe,
1286         .disconnect = line6_disconnect,
1287 #ifdef CONFIG_PM
1288         .suspend = line6_suspend,
1289         .resume = line6_resume,
1290         .reset_resume = line6_reset_resume,
1291 #endif
1292         .id_table = line6_id_table,
1293 };
1294
1295 /*
1296         Module initialization.
1297 */
1298 static int __init line6_init(void)
1299 {
1300         int i, retval;
1301
1302         printk(KERN_INFO "%s driver version %s\n", DRIVER_NAME, DRIVER_VERSION);
1303
1304         for (i = LINE6_MAX_DEVICES; i--;)
1305                 line6_devices[i] = NULL;
1306
1307         retval = usb_register(&line6_driver);
1308
1309         if (retval) {
1310                 err("usb_register failed. Error number %d", retval);
1311                 return retval;
1312         }
1313
1314         line6_request_version = kmalloc(sizeof(line6_request_version0),
1315                                         GFP_KERNEL);
1316
1317         if (line6_request_version == NULL) {
1318                 err("Out of memory");
1319                 return -ENOMEM;
1320         }
1321
1322         memcpy((char *)line6_request_version, line6_request_version0,
1323                sizeof(line6_request_version0));
1324
1325         return retval;
1326 }
1327
1328 /*
1329         Module cleanup.
1330 */
1331 static void __exit line6_exit(void)
1332 {
1333         int i;
1334         struct usb_line6 *line6;
1335         struct snd_line6_pcm *line6pcm;
1336
1337         /* stop all PCM channels */
1338         for (i = LINE6_MAX_DEVICES; i--;) {
1339                 line6 = line6_devices[i];
1340
1341                 if (line6 == NULL)
1342                         continue;
1343
1344                 line6pcm = line6->line6pcm;
1345
1346                 if (line6pcm == NULL)
1347                         continue;
1348
1349                 line6_pcm_stop(line6pcm, ~0);
1350         }
1351
1352         usb_deregister(&line6_driver);
1353         kfree(line6_request_version);
1354 }
1355
1356 module_init(line6_init);
1357 module_exit(line6_exit);
1358
1359 MODULE_AUTHOR(DRIVER_AUTHOR);
1360 MODULE_DESCRIPTION(DRIVER_DESC);
1361 MODULE_LICENSE("GPL");
1362 MODULE_VERSION(DRIVER_VERSION);