sound/usb/card.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   (Tentative) USB Audio Driver for ALSA
   4  *
   5  *   Copyright (c) 2002 by Takashi Iwai <[email protected]>
   6  *
   7  *   Many codes borrowed from audio.c by
   8  *          Alan Cox ([email protected])
   9  *          Thomas Sailer ([email protected])
  10  *
  11  *   Audio Class 3.0 support by Ruslan Bilovol <[email protected]>
  12  *
  13  *  NOTES:
  14  *
  15  *   - the linked URBs would be preferred but not used so far because of
  16  *     the instability of unlinking.
  17  *   - type II is not supported properly.  there is no device which supports
  18  *     this type *correctly*.  SB extigy looks as if it supports, but it's
  19  *     indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
  20  */
  21
  22
  23 #include <linux/bitops.h>
  24 #include <linux/init.h>
  25 #include <linux/list.h>
  26 #include <linux/slab.h>
  27 #include <linux/string.h>
  28 #include <linux/ctype.h>
  29 #include <linux/usb.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/mutex.h>
  32 #include <linux/usb/audio.h>
  33 #include <linux/usb/audio-v2.h>
  34 #include <linux/usb/audio-v3.h>
  35 #include <linux/module.h>
  36
  37 #include <sound/control.h>
  38 #include <sound/core.h>
  39 #include <sound/info.h>
  40 #include <sound/pcm.h>
  41 #include <sound/pcm_params.h>
  42 #include <sound/initval.h>
  43
  44 #include "usbaudio.h"
  45 #include "card.h"
  46 #include "midi.h"
  47 #include "midi2.h"
  48 #include "mixer.h"
  49 #include "proc.h"
  50 #include "quirks.h"
  51 #include "endpoint.h"
  52 #include "helper.h"
  53 #include "pcm.h"
  54 #include "format.h"
  55 #include "power.h"
  56 #include "stream.h"
  57 #include "media.h"
  58
  59 MODULE_AUTHOR("Takashi Iwai <[email protected]>");
  60 MODULE_DESCRIPTION("USB Audio");
  61 MODULE_LICENSE("GPL");
  62
  63 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  64 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  65 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
  66 /* Vendor/product IDs for this card */
  67 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
  68 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
  69 static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
  70 static bool ignore_ctl_error;
  71 static bool autoclock = true;
  72 static bool lowlatency = true;
  73 static char *quirk_alias[SNDRV_CARDS];
  74 static char *delayed_register[SNDRV_CARDS];
  75 static bool implicit_fb[SNDRV_CARDS];
  76 static unsigned int quirk_flags[SNDRV_CARDS];
  77
  78 bool snd_usb_use_vmalloc = true;
  79 bool snd_usb_skip_validation;
  80
  81 module_param_array(index, int, NULL, 0444);
  82 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
  83 module_param_array(id, charp, NULL, 0444);
  84 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
  85 module_param_array(enable, bool, NULL, 0444);
  86 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
  87 module_param_array(vid, int, NULL, 0444);
  88 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
  89 module_param_array(pid, int, NULL, 0444);
  90 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
  91 module_param_array(device_setup, int, NULL, 0444);
  92 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
  93 module_param(ignore_ctl_error, bool, 0444);
  94 MODULE_PARM_DESC(ignore_ctl_error,
  95                  "Ignore errors from USB controller for mixer interfaces.");
  96 module_param(autoclock, bool, 0444);
  97 MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
  98 module_param(lowlatency, bool, 0444);
  99 MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes).");
 100 module_param_array(quirk_alias, charp, NULL, 0444);
 101 MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
 102 module_param_array(delayed_register, charp, NULL, 0444);
 103 MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
 104 module_param_array(implicit_fb, bool, NULL, 0444);
 105 MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode.");
 106 module_param_array(quirk_flags, uint, NULL, 0444);
 107 MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags.");
 108 module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
 109 MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
 110 module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
 111 MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
 112
 113 /*
 114  * we keep the snd_usb_audio_t instances by ourselves for merging
 115  * the all interfaces on the same card as one sound device.
 116  */
 117
 118 static DEFINE_MUTEX(register_mutex);
 119 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
 120 static struct usb_driver usb_audio_driver;
 121
 122 /*
 123  * disconnect streams
 124  * called from usb_audio_disconnect()
 125  */
 126 static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
 127 {
 128         int idx;
 129         struct snd_usb_substream *subs;
 130
 131         for (idx = 0; idx < 2; idx++) {
 132                 subs = &as->substream[idx];
 133                 if (!subs->num_formats)
 134                         continue;
 135                 subs->data_endpoint = NULL;
 136                 subs->sync_endpoint = NULL;
 137         }
 138 }
 139
 140 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
 141 {
 142         struct usb_device *dev = chip->dev;
 143         struct usb_host_interface *alts;
 144         struct usb_interface_descriptor *altsd;
 145         struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
 146
 147         if (!iface) {
 148                 dev_err(&dev->dev, "%u:%d : does not exist\n",
 149                         ctrlif, interface);
 150                 return -EINVAL;
 151         }
 152
 153         alts = &iface->altsetting[0];
 154         altsd = get_iface_desc(alts);
 155
 156         /*
 157          * Android with both accessory and audio interfaces enabled gets the
 158          * interface numbers wrong.
 159          */
 160         if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
 161              chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
 162             interface == 0 &&
 163             altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
 164             altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
 165                 interface = 2;
 166                 iface = usb_ifnum_to_if(dev, interface);
 167                 if (!iface)
 168                         return -EINVAL;
 169                 alts = &iface->altsetting[0];
 170                 altsd = get_iface_desc(alts);
 171         }
 172
 173         if (usb_interface_claimed(iface)) {
 174                 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
 175                         ctrlif, interface);
 176                 return -EINVAL;
 177         }
 178
 179         if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
 180              altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
 181             altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
 182                 int err = snd_usb_midi_v2_create(chip, iface, NULL,
 183                                                  chip->usb_id);
 184                 if (err < 0) {
 185                         dev_err(&dev->dev,
 186                                 "%u:%d: cannot create sequencer device\n",
 187                                 ctrlif, interface);
 188                         return -EINVAL;
 189                 }
 190                 return usb_driver_claim_interface(&usb_audio_driver, iface,
 191                                                   USB_AUDIO_IFACE_UNUSED);
 192         }
 193
 194         if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
 195              altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
 196             altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
 197                 dev_dbg(&dev->dev,
 198                         "%u:%d: skipping non-supported interface %d\n",
 199                         ctrlif, interface, altsd->bInterfaceClass);
 200                 /* skip non-supported classes */
 201                 return -EINVAL;
 202         }
 203
 204         if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
 205                 dev_err(&dev->dev, "low speed audio streaming not supported\n");
 206                 return -EINVAL;
 207         }
 208
 209         if (! snd_usb_parse_audio_interface(chip, interface)) {
 210                 usb_set_interface(dev, interface, 0); /* reset the current interface */
 211                 return usb_driver_claim_interface(&usb_audio_driver, iface,
 212                                                   USB_AUDIO_IFACE_UNUSED);
 213         }
 214
 215         return 0;
 216 }
 217
 218 /*
 219  * parse audio control descriptor and create pcm/midi streams
 220  */
 221 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 222 {
 223         struct usb_device *dev = chip->dev;
 224         struct usb_host_interface *host_iface;
 225         struct usb_interface_descriptor *altsd;
 226         int i, protocol;
 227
 228         /* find audiocontrol interface */
 229         host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
 230         altsd = get_iface_desc(host_iface);
 231         protocol = altsd->bInterfaceProtocol;
 232
 233         switch (protocol) {
 234         default:
 235                 dev_warn(&dev->dev,
 236                          "unknown interface protocol %#02x, assuming v1\n",
 237                          protocol);
 238                 fallthrough;
 239
 240         case UAC_VERSION_1: {
 241                 struct uac1_ac_header_descriptor *h1;
 242                 int rest_bytes;
 243
 244                 h1 = snd_usb_find_csint_desc(host_iface->extra,
 245                                                          host_iface->extralen,
 246                                                          NULL, UAC_HEADER);
 247                 if (!h1 || h1->bLength < sizeof(*h1)) {
 248                         dev_err(&dev->dev, "cannot find UAC_HEADER\n");
 249                         return -EINVAL;
 250                 }
 251
 252                 rest_bytes = (void *)(host_iface->extra +
 253                                 host_iface->extralen) - (void *)h1;
 254
 255                 /* just to be sure -- this shouldn't hit at all */
 256                 if (rest_bytes <= 0) {
 257                         dev_err(&dev->dev, "invalid control header\n");
 258                         return -EINVAL;
 259                 }
 260
 261                 if (rest_bytes < sizeof(*h1)) {
 262                         dev_err(&dev->dev, "too short v1 buffer descriptor\n");
 263                         return -EINVAL;
 264                 }
 265
 266                 if (!h1->bInCollection) {
 267                         dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
 268                         return -EINVAL;
 269                 }
 270
 271                 if (rest_bytes < h1->bLength) {
 272                         dev_err(&dev->dev, "invalid buffer length (v1)\n");
 273                         return -EINVAL;
 274                 }
 275
 276                 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
 277                         dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
 278                         return -EINVAL;
 279                 }
 280
 281                 for (i = 0; i < h1->bInCollection; i++)
 282                         snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
 283
 284                 break;
 285         }
 286
 287         case UAC_VERSION_2:
 288         case UAC_VERSION_3: {
 289                 struct usb_interface_assoc_descriptor *assoc =
 290                         usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
 291
 292                 if (!assoc) {
 293                         /*
 294                          * Firmware writers cannot count to three.  So to find
 295                          * the IAD on the NuForce UDH-100, also check the next
 296                          * interface.
 297                          */
 298                         struct usb_interface *iface =
 299                                 usb_ifnum_to_if(dev, ctrlif + 1);
 300                         if (iface &&
 301                             iface->intf_assoc &&
 302                             iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
 303                             iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
 304                                 assoc = iface->intf_assoc;
 305                 }
 306
 307                 if (!assoc) {
 308                         dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
 309                         return -EINVAL;
 310                 }
 311
 312                 if (protocol == UAC_VERSION_3) {
 313                         int badd = assoc->bFunctionSubClass;
 314
 315                         if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
 316                             (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
 317                              badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
 318                                 dev_err(&dev->dev,
 319                                         "Unsupported UAC3 BADD profile\n");
 320                                 return -EINVAL;
 321                         }
 322
 323                         chip->badd_profile = badd;
 324                 }
 325
 326                 for (i = 0; i < assoc->bInterfaceCount; i++) {
 327                         int intf = assoc->bFirstInterface + i;
 328
 329                         if (intf != ctrlif)
 330                                 snd_usb_create_stream(chip, ctrlif, intf);
 331                 }
 332
 333                 break;
 334         }
 335         }
 336
 337         return 0;
 338 }
 339
 340 /*
 341  * Profile name preset table
 342  */
 343 struct usb_audio_device_name {
 344         u32 id;
 345         const char *vendor_name;
 346         const char *product_name;
 347         const char *profile_name;       /* override card->longname */
 348 };
 349
 350 #define PROFILE_NAME(vid, pid, vendor, product, profile)         \
 351         { .id = USB_ID(vid, pid), .vendor_name = (vendor),       \
 352           .product_name = (product), .profile_name = (profile) }
 353 #define DEVICE_NAME(vid, pid, vendor, product) \
 354         PROFILE_NAME(vid, pid, vendor, product, NULL)
 355
 356 /* vendor/product and profile name presets, sorted in device id order */
 357 static const struct usb_audio_device_name usb_audio_names[] = {
 358         /* HP Thunderbolt Dock Audio Headset */
 359         PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
 360                      "HP-Thunderbolt-Dock-Audio-Headset"),
 361         /* HP Thunderbolt Dock Audio Module */
 362         PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
 363                      "HP-Thunderbolt-Dock-Audio-Module"),
 364
 365         /* Two entries for Gigabyte TRX40 Aorus Master:
 366          * TRX40 Aorus Master has two USB-audio devices, one for the front
 367          * headphone with ESS SABRE9218 DAC chip, while another for the rest
 368          * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
 369          * Here we provide two distinct names for making UCM profiles easier.
 370          */
 371         PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
 372                      "Gigabyte-Aorus-Master-Front-Headphone"),
 373         PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
 374                      "Gigabyte-Aorus-Master-Main-Audio"),
 375
 376         /* Gigabyte TRX40 Aorus Pro WiFi */
 377         PROFILE_NAME(0x0414, 0xa002,
 378                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 379
 380         /* Creative/E-Mu devices */
 381         DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
 382         /* Creative/Toshiba Multimedia Center SB-0500 */
 383         DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
 384
 385         DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
 386
 387         DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
 388         DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
 389
 390         /* ASUS ROG Zenith II: this machine has also two devices, one for
 391          * the front headphone and another for the rest
 392          */
 393         PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
 394                      "Zenith-II-Front-Headphone"),
 395         PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
 396                      "Zenith-II-Main-Audio"),
 397
 398         /* ASUS ROG Strix */
 399         PROFILE_NAME(0x0b05, 0x1917,
 400                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 401         /* ASUS PRIME TRX40 PRO-S */
 402         PROFILE_NAME(0x0b05, 0x1918,
 403                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 404
 405         /* Dell WD15 Dock */
 406         PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
 407         /* Dell WD19 Dock */
 408         PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
 409
 410         DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
 411
 412         /*
 413          * The original product_name is "USB Sound Device", however this name
 414          * is also used by the CM106 based cards, so make it unique.
 415          */
 416         DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
 417         DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
 418
 419         /* MSI TRX40 Creator */
 420         PROFILE_NAME(0x0db0, 0x0d64,
 421                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 422         /* MSI TRX40 */
 423         PROFILE_NAME(0x0db0, 0x543d,
 424                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 425
 426         DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
 427
 428         /* Dock/Stand for HP Engage Go */
 429         PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock",
 430                      "HP-Engage-Go-Dock"),
 431
 432         /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
 433         DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
 434         DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
 435
 436         /* aka. Serato Scratch Live DJ Box */
 437         DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
 438
 439         /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
 440         PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
 441                      "Lenovo-ThinkStation-P620-Rear"),
 442         /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
 443         PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
 444                      "Lenovo-ThinkStation-P620-Main"),
 445
 446         /* Asrock TRX40 Creator */
 447         PROFILE_NAME(0x26ce, 0x0a01,
 448                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 449
 450         DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
 451         DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
 452         DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
 453         DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
 454         DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
 455         DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
 456         DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
 457         DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
 458         DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
 459         DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
 460         DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
 461         DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
 462         DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
 463         DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
 464         DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
 465
 466         { } /* terminator */
 467 };
 468
 469 static const struct usb_audio_device_name *
 470 lookup_device_name(u32 id)
 471 {
 472         static const struct usb_audio_device_name *p;
 473
 474         for (p = usb_audio_names; p->id; p++)
 475                 if (p->id == id)
 476                         return p;
 477         return NULL;
 478 }
 479
 480 /*
 481  * free the chip instance
 482  *
 483  * here we have to do not much, since pcm and controls are already freed
 484  *
 485  */
 486
 487 static void snd_usb_audio_free(struct snd_card *card)
 488 {
 489         struct snd_usb_audio *chip = card->private_data;
 490
 491         snd_usb_endpoint_free_all(chip);
 492         snd_usb_midi_v2_free_all(chip);
 493
 494         mutex_destroy(&chip->mutex);
 495         if (!atomic_read(&chip->shutdown))
 496                 dev_set_drvdata(&chip->dev->dev, NULL);
 497 }
 498
 499 static void usb_audio_make_shortname(struct usb_device *dev,
 500                                      struct snd_usb_audio *chip,
 501                                      const struct snd_usb_audio_quirk *quirk)
 502 {
 503         struct snd_card *card = chip->card;
 504         const struct usb_audio_device_name *preset;
 505         const char *s = NULL;
 506
 507         preset = lookup_device_name(chip->usb_id);
 508         if (preset && preset->product_name)
 509                 s = preset->product_name;
 510         else if (quirk && quirk->product_name)
 511                 s = quirk->product_name;
 512         if (s && *s) {
 513                 strscpy(card->shortname, s, sizeof(card->shortname));
 514                 return;
 515         }
 516
 517         /* retrieve the device string as shortname */
 518         if (!dev->descriptor.iProduct ||
 519             usb_string(dev, dev->descriptor.iProduct,
 520                        card->shortname, sizeof(card->shortname)) <= 0) {
 521                 /* no name available from anywhere, so use ID */
 522                 sprintf(card->shortname, "USB Device %#04x:%#04x",
 523                         USB_ID_VENDOR(chip->usb_id),
 524                         USB_ID_PRODUCT(chip->usb_id));
 525         }
 526
 527         strim(card->shortname);
 528 }
 529
 530 static void usb_audio_make_longname(struct usb_device *dev,
 531                                     struct snd_usb_audio *chip,
 532                                     const struct snd_usb_audio_quirk *quirk)
 533 {
 534         struct snd_card *card = chip->card;
 535         const struct usb_audio_device_name *preset;
 536         const char *s = NULL;
 537         int len;
 538
 539         preset = lookup_device_name(chip->usb_id);
 540
 541         /* shortcut - if any pre-defined string is given, use it */
 542         if (preset && preset->profile_name)
 543                 s = preset->profile_name;
 544         if (s && *s) {
 545                 strscpy(card->longname, s, sizeof(card->longname));
 546                 return;
 547         }
 548
 549         if (preset && preset->vendor_name)
 550                 s = preset->vendor_name;
 551         else if (quirk && quirk->vendor_name)
 552                 s = quirk->vendor_name;
 553         *card->longname = 0;
 554         if (s && *s) {
 555                 strscpy(card->longname, s, sizeof(card->longname));
 556         } else {
 557                 /* retrieve the vendor and device strings as longname */
 558                 if (dev->descriptor.iManufacturer)
 559                         usb_string(dev, dev->descriptor.iManufacturer,
 560                                    card->longname, sizeof(card->longname));
 561                 /* we don't really care if there isn't any vendor string */
 562         }
 563         if (*card->longname) {
 564                 strim(card->longname);
 565                 if (*card->longname)
 566                         strlcat(card->longname, " ", sizeof(card->longname));
 567         }
 568
 569         strlcat(card->longname, card->shortname, sizeof(card->longname));
 570
 571         len = strlcat(card->longname, " at ", sizeof(card->longname));
 572
 573         if (len < sizeof(card->longname))
 574                 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
 575
 576         switch (snd_usb_get_speed(dev)) {
 577         case USB_SPEED_LOW:
 578                 strlcat(card->longname, ", low speed", sizeof(card->longname));
 579                 break;
 580         case USB_SPEED_FULL:
 581                 strlcat(card->longname, ", full speed", sizeof(card->longname));
 582                 break;
 583         case USB_SPEED_HIGH:
 584                 strlcat(card->longname, ", high speed", sizeof(card->longname));
 585                 break;
 586         case USB_SPEED_SUPER:
 587                 strlcat(card->longname, ", super speed", sizeof(card->longname));
 588                 break;
 589         case USB_SPEED_SUPER_PLUS:
 590                 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
 591                 break;
 592         default:
 593                 break;
 594         }
 595 }
 596
 597 /*
 598  * create a chip instance and set its names.
 599  */
 600 static int snd_usb_audio_create(struct usb_interface *intf,
 601                                 struct usb_device *dev, int idx,
 602                                 const struct snd_usb_audio_quirk *quirk,
 603                                 unsigned int usb_id,
 604                                 struct snd_usb_audio **rchip)
 605 {
 606         struct snd_card *card;
 607         struct snd_usb_audio *chip;
 608         int err;
 609         char component[14];
 610
 611         *rchip = NULL;
 612
 613         switch (snd_usb_get_speed(dev)) {
 614         case USB_SPEED_LOW:
 615         case USB_SPEED_FULL:
 616         case USB_SPEED_HIGH:
 617         case USB_SPEED_SUPER:
 618         case USB_SPEED_SUPER_PLUS:
 619                 break;
 620         default:
 621                 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
 622                 return -ENXIO;
 623         }
 624
 625         err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
 626                            sizeof(*chip), &card);
 627         if (err < 0) {
 628                 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
 629                 return err;
 630         }
 631
 632         chip = card->private_data;
 633         mutex_init(&chip->mutex);
 634         init_waitqueue_head(&chip->shutdown_wait);
 635         chip->index = idx;
 636         chip->dev = dev;
 637         chip->card = card;
 638         chip->setup = device_setup[idx];
 639         chip->generic_implicit_fb = implicit_fb[idx];
 640         chip->autoclock = autoclock;
 641         chip->lowlatency = lowlatency;
 642         atomic_set(&chip->active, 1); /* avoid autopm during probing */
 643         atomic_set(&chip->usage_count, 0);
 644         atomic_set(&chip->shutdown, 0);
 645
 646         chip->usb_id = usb_id;
 647         INIT_LIST_HEAD(&chip->pcm_list);
 648         INIT_LIST_HEAD(&chip->ep_list);
 649         INIT_LIST_HEAD(&chip->iface_ref_list);
 650         INIT_LIST_HEAD(&chip->clock_ref_list);
 651         INIT_LIST_HEAD(&chip->midi_list);
 652         INIT_LIST_HEAD(&chip->midi_v2_list);
 653         INIT_LIST_HEAD(&chip->mixer_list);
 654
 655         if (quirk_flags[idx])
 656                 chip->quirk_flags = quirk_flags[idx];
 657         else
 658                 snd_usb_init_quirk_flags(chip);
 659
 660         card->private_free = snd_usb_audio_free;
 661
 662         strcpy(card->driver, "USB-Audio");
 663         sprintf(component, "USB%04x:%04x",
 664                 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
 665         snd_component_add(card, component);
 666
 667         usb_audio_make_shortname(dev, chip, quirk);
 668         usb_audio_make_longname(dev, chip, quirk);
 669
 670         snd_usb_audio_create_proc(chip);
 671
 672         *rchip = chip;
 673         return 0;
 674 }
 675
 676 /* look for a matching quirk alias id */
 677 static bool get_alias_id(struct usb_device *dev, unsigned int *id)
 678 {
 679         int i;
 680         unsigned int src, dst;
 681
 682         for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
 683                 if (!quirk_alias[i] ||
 684                     sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
 685                     src != *id)
 686                         continue;
 687                 dev_info(&dev->dev,
 688                          "device (%04x:%04x): applying quirk alias %04x:%04x\n",
 689                          USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
 690                          USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
 691                 *id = dst;
 692                 return true;
 693         }
 694
 695         return false;
 696 }
 697
 698 static int check_delayed_register_option(struct snd_usb_audio *chip)
 699 {
 700         int i;
 701         unsigned int id, inum;
 702
 703         for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
 704                 if (delayed_register[i] &&
 705                     sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
 706                     id == chip->usb_id)
 707                         return inum;
 708         }
 709
 710         return -1;
 711 }
 712
 713 static const struct usb_device_id usb_audio_ids[]; /* defined below */
 714
 715 /* look for the last interface that matches with our ids and remember it */
 716 static void find_last_interface(struct snd_usb_audio *chip)
 717 {
 718         struct usb_host_config *config = chip->dev->actconfig;
 719         struct usb_interface *intf;
 720         int i;
 721
 722         if (!config)
 723                 return;
 724         for (i = 0; i < config->desc.bNumInterfaces; i++) {
 725                 intf = config->interface[i];
 726                 if (usb_match_id(intf, usb_audio_ids))
 727                         chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
 728         }
 729         usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
 730 }
 731
 732 /* look for the corresponding quirk */
 733 static const struct snd_usb_audio_quirk *
 734 get_alias_quirk(struct usb_device *dev, unsigned int id)
 735 {
 736         const struct usb_device_id *p;
 737
 738         for (p = usb_audio_ids; p->match_flags; p++) {
 739                 /* FIXME: this checks only vendor:product pair in the list */
 740                 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
 741                     USB_DEVICE_ID_MATCH_DEVICE &&
 742                     p->idVendor == USB_ID_VENDOR(id) &&
 743                     p->idProduct == USB_ID_PRODUCT(id))
 744                         return (const struct snd_usb_audio_quirk *)p->driver_info;
 745         }
 746
 747         return NULL;
 748 }
 749
 750 /* register card if we reach to the last interface or to the specified
 751  * one given via option
 752  */
 753 static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
 754 {
 755         if (check_delayed_register_option(chip) == ifnum ||
 756             chip->last_iface == ifnum ||
 757             usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface)))
 758                 return snd_card_register(chip->card);
 759         return 0;
 760 }
 761
 762 /*
 763  * probe the active usb device
 764  *
 765  * note that this can be called multiple times per a device, when it
 766  * includes multiple audio control interfaces.
 767  *
 768  * thus we check the usb device pointer and creates the card instance
 769  * only at the first time.  the successive calls of this function will
 770  * append the pcm interface to the corresponding card.
 771  */
 772 static int usb_audio_probe(struct usb_interface *intf,
 773                            const struct usb_device_id *usb_id)
 774 {
 775         struct usb_device *dev = interface_to_usbdev(intf);
 776         const struct snd_usb_audio_quirk *quirk =
 777                 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
 778         struct snd_usb_audio *chip;
 779         int i, err;
 780         struct usb_host_interface *alts;
 781         int ifnum;
 782         u32 id;
 783
 784         alts = &intf->altsetting[0];
 785         ifnum = get_iface_desc(alts)->bInterfaceNumber;
 786         id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
 787                     le16_to_cpu(dev->descriptor.idProduct));
 788         if (get_alias_id(dev, &id))
 789                 quirk = get_alias_quirk(dev, id);
 790         if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
 791                 return -ENXIO;
 792         if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
 793                 return -ENODEV;
 794
 795         err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
 796         if (err < 0)
 797                 return err;
 798
 799         /*
 800          * found a config.  now register to ALSA
 801          */
 802
 803         /* check whether it's already registered */
 804         chip = NULL;
 805         mutex_lock(&register_mutex);
 806         for (i = 0; i < SNDRV_CARDS; i++) {
 807                 if (usb_chip[i] && usb_chip[i]->dev == dev) {
 808                         if (atomic_read(&usb_chip[i]->shutdown)) {
 809                                 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
 810                                 err = -EIO;
 811                                 goto __error;
 812                         }
 813                         chip = usb_chip[i];
 814                         atomic_inc(&chip->active); /* avoid autopm */
 815                         break;
 816                 }
 817         }
 818         if (! chip) {
 819                 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
 820                 if (err < 0)
 821                         goto __error;
 822
 823                 /* it's a fresh one.
 824                  * now look for an empty slot and create a new card instance
 825                  */
 826                 for (i = 0; i < SNDRV_CARDS; i++)
 827                         if (!usb_chip[i] &&
 828                             (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
 829                             (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
 830                                 if (enable[i]) {
 831                                         err = snd_usb_audio_create(intf, dev, i, quirk,
 832                                                                    id, &chip);
 833                                         if (err < 0)
 834                                                 goto __error;
 835                                         break;
 836                                 } else if (vid[i] != -1 || pid[i] != -1) {
 837                                         dev_info(&dev->dev,
 838                                                  "device (%04x:%04x) is disabled\n",
 839                                                  USB_ID_VENDOR(id),
 840                                                  USB_ID_PRODUCT(id));
 841                                         err = -ENOENT;
 842                                         goto __error;
 843                                 }
 844                         }
 845                 if (!chip) {
 846                         dev_err(&dev->dev, "no available usb audio device\n");
 847                         err = -ENODEV;
 848                         goto __error;
 849                 }
 850                 find_last_interface(chip);
 851         }
 852
 853         if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
 854                 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
 855                 err = -EINVAL;
 856                 goto __error;
 857         }
 858
 859         dev_set_drvdata(&dev->dev, chip);
 860
 861         if (ignore_ctl_error)
 862                 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
 863
 864         if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
 865                 usb_disable_autosuspend(interface_to_usbdev(intf));
 866
 867         /*
 868          * For devices with more than one control interface, we assume the
 869          * first contains the audio controls. We might need a more specific
 870          * check here in the future.
 871          */
 872         if (!chip->ctrl_intf)
 873                 chip->ctrl_intf = alts;
 874
 875         err = 1; /* continue */
 876         if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
 877                 /* need some special handlings */
 878                 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
 879                 if (err < 0)
 880                         goto __error;
 881         }
 882
 883         if (err > 0) {
 884                 /* create normal USB audio interfaces */
 885                 err = snd_usb_create_streams(chip, ifnum);
 886                 if (err < 0)
 887                         goto __error;
 888                 err = snd_usb_create_mixer(chip, ifnum);
 889                 if (err < 0)
 890                         goto __error;
 891         }
 892
 893         if (chip->need_delayed_register) {
 894                 dev_info(&dev->dev,
 895                          "Found post-registration device assignment: %08x:%02x\n",
 896                          chip->usb_id, ifnum);
 897                 chip->need_delayed_register = false; /* clear again */
 898         }
 899
 900         err = try_to_register_card(chip, ifnum);
 901         if (err < 0)
 902                 goto __error_no_register;
 903
 904         if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
 905                 /* don't want to fail when snd_media_device_create() fails */
 906                 snd_media_device_create(chip, intf);
 907         }
 908
 909         if (quirk)
 910                 chip->quirk_type = quirk->type;
 911
 912         usb_chip[chip->index] = chip;
 913         chip->intf[chip->num_interfaces] = intf;
 914         chip->num_interfaces++;
 915         usb_set_intfdata(intf, chip);
 916         atomic_dec(&chip->active);
 917         mutex_unlock(&register_mutex);
 918         return 0;
 919
 920  __error:
 921         /* in the case of error in secondary interface, still try to register */
 922         if (chip)
 923                 try_to_register_card(chip, ifnum);
 924
 925  __error_no_register:
 926         if (chip) {
 927                 /* chip->active is inside the chip->card object,
 928                  * decrement before memory is possibly returned.
 929                  */
 930                 atomic_dec(&chip->active);
 931                 if (!chip->num_interfaces)
 932                         snd_card_free(chip->card);
 933         }
 934         mutex_unlock(&register_mutex);
 935         return err;
 936 }
 937
 938 /*
 939  * we need to take care of counter, since disconnection can be called also
 940  * many times as well as usb_audio_probe().
 941  */
 942 static void usb_audio_disconnect(struct usb_interface *intf)
 943 {
 944         struct snd_usb_audio *chip = usb_get_intfdata(intf);
 945         struct snd_card *card;
 946         struct list_head *p;
 947
 948         if (chip == USB_AUDIO_IFACE_UNUSED)
 949                 return;
 950
 951         card = chip->card;
 952
 953         mutex_lock(&register_mutex);
 954         if (atomic_inc_return(&chip->shutdown) == 1) {
 955                 struct snd_usb_stream *as;
 956                 struct snd_usb_endpoint *ep;
 957                 struct usb_mixer_interface *mixer;
 958
 959                 /* wait until all pending tasks done;
 960                  * they are protected by snd_usb_lock_shutdown()
 961                  */
 962                 wait_event(chip->shutdown_wait,
 963                            !atomic_read(&chip->usage_count));
 964                 snd_card_disconnect(card);
 965                 /* release the pcm resources */
 966                 list_for_each_entry(as, &chip->pcm_list, list) {
 967                         snd_usb_stream_disconnect(as);
 968                 }
 969                 /* release the endpoint resources */
 970                 list_for_each_entry(ep, &chip->ep_list, list) {
 971                         snd_usb_endpoint_release(ep);
 972                 }
 973                 /* release the midi resources */
 974                 list_for_each(p, &chip->midi_list) {
 975                         snd_usbmidi_disconnect(p);
 976                 }
 977                 snd_usb_midi_v2_disconnect_all(chip);
 978                 /*
 979                  * Nice to check quirk && quirk->shares_media_device and
 980                  * then call the snd_media_device_delete(). Don't have
 981                  * access to the quirk here. snd_media_device_delete()
 982                  * accesses mixer_list
 983                  */
 984                 snd_media_device_delete(chip);
 985
 986                 /* release mixer resources */
 987                 list_for_each_entry(mixer, &chip->mixer_list, list) {
 988                         snd_usb_mixer_disconnect(mixer);
 989                 }
 990         }
 991
 992         if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
 993                 usb_enable_autosuspend(interface_to_usbdev(intf));
 994
 995         chip->num_interfaces--;
 996         if (chip->num_interfaces <= 0) {
 997                 usb_chip[chip->index] = NULL;
 998                 mutex_unlock(&register_mutex);
 999                 snd_card_free_when_closed(card);
1000         } else {
1001                 mutex_unlock(&register_mutex);
1002         }
1003 }
1004
1005 /* lock the shutdown (disconnect) task and autoresume */
1006 int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1007 {
1008         int err;
1009
1010         atomic_inc(&chip->usage_count);
1011         if (atomic_read(&chip->shutdown)) {
1012                 err = -EIO;
1013                 goto error;
1014         }
1015         err = snd_usb_autoresume(chip);
1016         if (err < 0)
1017                 goto error;
1018         return 0;
1019
1020  error:
1021         if (atomic_dec_and_test(&chip->usage_count))
1022                 wake_up(&chip->shutdown_wait);
1023         return err;
1024 }
1025
1026 /* autosuspend and unlock the shutdown */
1027 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1028 {
1029         snd_usb_autosuspend(chip);
1030         if (atomic_dec_and_test(&chip->usage_count))
1031                 wake_up(&chip->shutdown_wait);
1032 }
1033
1034 int snd_usb_autoresume(struct snd_usb_audio *chip)
1035 {
1036         int i, err;
1037
1038         if (atomic_read(&chip->shutdown))
1039                 return -EIO;
1040         if (atomic_inc_return(&chip->active) != 1)
1041                 return 0;
1042
1043         for (i = 0; i < chip->num_interfaces; i++) {
1044                 err = usb_autopm_get_interface(chip->intf[i]);
1045                 if (err < 0) {
1046                         /* rollback */
1047                         while (--i >= 0)
1048                                 usb_autopm_put_interface(chip->intf[i]);
1049                         atomic_dec(&chip->active);
1050                         return err;
1051                 }
1052         }
1053         return 0;
1054 }
1055
1056 void snd_usb_autosuspend(struct snd_usb_audio *chip)
1057 {
1058         int i;
1059
1060         if (atomic_read(&chip->shutdown))
1061                 return;
1062         if (!atomic_dec_and_test(&chip->active))
1063                 return;
1064
1065         for (i = 0; i < chip->num_interfaces; i++)
1066                 usb_autopm_put_interface(chip->intf[i]);
1067 }
1068
1069 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1070 {
1071         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1072         struct snd_usb_stream *as;
1073         struct snd_usb_endpoint *ep;
1074         struct usb_mixer_interface *mixer;
1075         struct list_head *p;
1076
1077         if (chip == USB_AUDIO_IFACE_UNUSED)
1078                 return 0;
1079
1080         if (!chip->num_suspended_intf++) {
1081                 list_for_each_entry(as, &chip->pcm_list, list)
1082                         snd_usb_pcm_suspend(as);
1083                 list_for_each_entry(ep, &chip->ep_list, list)
1084                         snd_usb_endpoint_suspend(ep);
1085                 list_for_each(p, &chip->midi_list)
1086                         snd_usbmidi_suspend(p);
1087                 list_for_each_entry(mixer, &chip->mixer_list, list)
1088                         snd_usb_mixer_suspend(mixer);
1089                 snd_usb_midi_v2_suspend_all(chip);
1090         }
1091
1092         if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1093                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1094                 chip->system_suspend = chip->num_suspended_intf;
1095         }
1096
1097         return 0;
1098 }
1099
1100 static int usb_audio_resume(struct usb_interface *intf)
1101 {
1102         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1103         struct snd_usb_stream *as;
1104         struct usb_mixer_interface *mixer;
1105         struct list_head *p;
1106         int err = 0;
1107
1108         if (chip == USB_AUDIO_IFACE_UNUSED)
1109                 return 0;
1110
1111         atomic_inc(&chip->active); /* avoid autopm */
1112         if (chip->num_suspended_intf > 1)
1113                 goto out;
1114
1115         list_for_each_entry(as, &chip->pcm_list, list) {
1116                 err = snd_usb_pcm_resume(as);
1117                 if (err < 0)
1118                         goto err_out;
1119         }
1120
1121         /*
1122          * ALSA leaves material resumption to user space
1123          * we just notify and restart the mixers
1124          */
1125         list_for_each_entry(mixer, &chip->mixer_list, list) {
1126                 err = snd_usb_mixer_resume(mixer);
1127                 if (err < 0)
1128                         goto err_out;
1129         }
1130
1131         list_for_each(p, &chip->midi_list) {
1132                 snd_usbmidi_resume(p);
1133         }
1134
1135         snd_usb_midi_v2_resume_all(chip);
1136
1137  out:
1138         if (chip->num_suspended_intf == chip->system_suspend) {
1139                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1140                 chip->system_suspend = 0;
1141         }
1142         chip->num_suspended_intf--;
1143
1144 err_out:
1145         atomic_dec(&chip->active); /* allow autopm after this point */
1146         return err;
1147 }
1148
1149 static const struct usb_device_id usb_audio_ids [] = {
1150 #include "quirks-table.h"
1151     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1152       .bInterfaceClass = USB_CLASS_AUDIO,
1153       .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1154     { }                                         /* Terminating entry */
1155 };
1156 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1157
1158 /*
1159  * entry point for linux usb interface
1160  */
1161
1162 static struct usb_driver usb_audio_driver = {
1163         .name =         "snd-usb-audio",
1164         .probe =        usb_audio_probe,
1165         .disconnect =   usb_audio_disconnect,
1166         .suspend =      usb_audio_suspend,
1167         .resume =       usb_audio_resume,
1168         .reset_resume = usb_audio_resume,
1169         .id_table =     usb_audio_ids,
1170         .supports_autosuspend = 1,
1171 };
1172
1173 module_usb_driver(usb_audio_driver);