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 <tiwai@suse.de>
   6  *
   7  *   Many codes borrowed from audio.c by
   8  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
   9  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
  10  *
  11  *   Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
  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 <tiwai@suse.de>");
  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         /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
 429         DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
 430         DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
 431
 432         /* aka. Serato Scratch Live DJ Box */
 433         DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
 434
 435         /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
 436         PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
 437                      "Lenovo-ThinkStation-P620-Rear"),
 438         /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
 439         PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
 440                      "Lenovo-ThinkStation-P620-Main"),
 441
 442         /* Asrock TRX40 Creator */
 443         PROFILE_NAME(0x26ce, 0x0a01,
 444                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 445
 446         DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
 447         DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
 448         DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
 449         DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
 450         DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
 451         DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
 452         DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
 453         DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
 454         DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
 455         DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
 456         DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
 457         DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
 458         DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
 459         DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
 460         DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
 461
 462         { } /* terminator */
 463 };
 464
 465 static const struct usb_audio_device_name *
 466 lookup_device_name(u32 id)
 467 {
 468         static const struct usb_audio_device_name *p;
 469
 470         for (p = usb_audio_names; p->id; p++)
 471                 if (p->id == id)
 472                         return p;
 473         return NULL;
 474 }
 475
 476 /*
 477  * free the chip instance
 478  *
 479  * here we have to do not much, since pcm and controls are already freed
 480  *
 481  */
 482
 483 static void snd_usb_audio_free(struct snd_card *card)
 484 {
 485         struct snd_usb_audio *chip = card->private_data;
 486
 487         snd_usb_endpoint_free_all(chip);
 488         snd_usb_midi_v2_free_all(chip);
 489
 490         mutex_destroy(&chip->mutex);
 491         if (!atomic_read(&chip->shutdown))
 492                 dev_set_drvdata(&chip->dev->dev, NULL);
 493 }
 494
 495 static void usb_audio_make_shortname(struct usb_device *dev,
 496                                      struct snd_usb_audio *chip,
 497                                      const struct snd_usb_audio_quirk *quirk)
 498 {
 499         struct snd_card *card = chip->card;
 500         const struct usb_audio_device_name *preset;
 501         const char *s = NULL;
 502
 503         preset = lookup_device_name(chip->usb_id);
 504         if (preset && preset->product_name)
 505                 s = preset->product_name;
 506         else if (quirk && quirk->product_name)
 507                 s = quirk->product_name;
 508         if (s && *s) {
 509                 strscpy(card->shortname, s, sizeof(card->shortname));
 510                 return;
 511         }
 512
 513         /* retrieve the device string as shortname */
 514         if (!dev->descriptor.iProduct ||
 515             usb_string(dev, dev->descriptor.iProduct,
 516                        card->shortname, sizeof(card->shortname)) <= 0) {
 517                 /* no name available from anywhere, so use ID */
 518                 sprintf(card->shortname, "USB Device %#04x:%#04x",
 519                         USB_ID_VENDOR(chip->usb_id),
 520                         USB_ID_PRODUCT(chip->usb_id));
 521         }
 522
 523         strim(card->shortname);
 524 }
 525
 526 static void usb_audio_make_longname(struct usb_device *dev,
 527                                     struct snd_usb_audio *chip,
 528                                     const struct snd_usb_audio_quirk *quirk)
 529 {
 530         struct snd_card *card = chip->card;
 531         const struct usb_audio_device_name *preset;
 532         const char *s = NULL;
 533         int len;
 534
 535         preset = lookup_device_name(chip->usb_id);
 536
 537         /* shortcut - if any pre-defined string is given, use it */
 538         if (preset && preset->profile_name)
 539                 s = preset->profile_name;
 540         if (s && *s) {
 541                 strscpy(card->longname, s, sizeof(card->longname));
 542                 return;
 543         }
 544
 545         if (preset && preset->vendor_name)
 546                 s = preset->vendor_name;
 547         else if (quirk && quirk->vendor_name)
 548                 s = quirk->vendor_name;
 549         *card->longname = 0;
 550         if (s && *s) {
 551                 strscpy(card->longname, s, sizeof(card->longname));
 552         } else {
 553                 /* retrieve the vendor and device strings as longname */
 554                 if (dev->descriptor.iManufacturer)
 555                         usb_string(dev, dev->descriptor.iManufacturer,
 556                                    card->longname, sizeof(card->longname));
 557                 /* we don't really care if there isn't any vendor string */
 558         }
 559         if (*card->longname) {
 560                 strim(card->longname);
 561                 if (*card->longname)
 562                         strlcat(card->longname, " ", sizeof(card->longname));
 563         }
 564
 565         strlcat(card->longname, card->shortname, sizeof(card->longname));
 566
 567         len = strlcat(card->longname, " at ", sizeof(card->longname));
 568
 569         if (len < sizeof(card->longname))
 570                 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
 571
 572         switch (snd_usb_get_speed(dev)) {
 573         case USB_SPEED_LOW:
 574                 strlcat(card->longname, ", low speed", sizeof(card->longname));
 575                 break;
 576         case USB_SPEED_FULL:
 577                 strlcat(card->longname, ", full speed", sizeof(card->longname));
 578                 break;
 579         case USB_SPEED_HIGH:
 580                 strlcat(card->longname, ", high speed", sizeof(card->longname));
 581                 break;
 582         case USB_SPEED_SUPER:
 583                 strlcat(card->longname, ", super speed", sizeof(card->longname));
 584                 break;
 585         case USB_SPEED_SUPER_PLUS:
 586                 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
 587                 break;
 588         default:
 589                 break;
 590         }
 591 }
 592
 593 /*
 594  * create a chip instance and set its names.
 595  */
 596 static int snd_usb_audio_create(struct usb_interface *intf,
 597                                 struct usb_device *dev, int idx,
 598                                 const struct snd_usb_audio_quirk *quirk,
 599                                 unsigned int usb_id,
 600                                 struct snd_usb_audio **rchip)
 601 {
 602         struct snd_card *card;
 603         struct snd_usb_audio *chip;
 604         int err;
 605         char component[14];
 606
 607         *rchip = NULL;
 608
 609         switch (snd_usb_get_speed(dev)) {
 610         case USB_SPEED_LOW:
 611         case USB_SPEED_FULL:
 612         case USB_SPEED_HIGH:
 613         case USB_SPEED_SUPER:
 614         case USB_SPEED_SUPER_PLUS:
 615                 break;
 616         default:
 617                 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
 618                 return -ENXIO;
 619         }
 620
 621         err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
 622                            sizeof(*chip), &card);
 623         if (err < 0) {
 624                 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
 625                 return err;
 626         }
 627
 628         chip = card->private_data;
 629         mutex_init(&chip->mutex);
 630         init_waitqueue_head(&chip->shutdown_wait);
 631         chip->index = idx;
 632         chip->dev = dev;
 633         chip->card = card;
 634         chip->setup = device_setup[idx];
 635         chip->generic_implicit_fb = implicit_fb[idx];
 636         chip->autoclock = autoclock;
 637         chip->lowlatency = lowlatency;
 638         atomic_set(&chip->active, 1); /* avoid autopm during probing */
 639         atomic_set(&chip->usage_count, 0);
 640         atomic_set(&chip->shutdown, 0);
 641
 642         chip->usb_id = usb_id;
 643         INIT_LIST_HEAD(&chip->pcm_list);
 644         INIT_LIST_HEAD(&chip->ep_list);
 645         INIT_LIST_HEAD(&chip->iface_ref_list);
 646         INIT_LIST_HEAD(&chip->clock_ref_list);
 647         INIT_LIST_HEAD(&chip->midi_list);
 648         INIT_LIST_HEAD(&chip->midi_v2_list);
 649         INIT_LIST_HEAD(&chip->mixer_list);
 650
 651         if (quirk_flags[idx])
 652                 chip->quirk_flags = quirk_flags[idx];
 653         else
 654                 snd_usb_init_quirk_flags(chip);
 655
 656         card->private_free = snd_usb_audio_free;
 657
 658         strcpy(card->driver, "USB-Audio");
 659         sprintf(component, "USB%04x:%04x",
 660                 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
 661         snd_component_add(card, component);
 662
 663         usb_audio_make_shortname(dev, chip, quirk);
 664         usb_audio_make_longname(dev, chip, quirk);
 665
 666         snd_usb_audio_create_proc(chip);
 667
 668         *rchip = chip;
 669         return 0;
 670 }
 671
 672 /* look for a matching quirk alias id */
 673 static bool get_alias_id(struct usb_device *dev, unsigned int *id)
 674 {
 675         int i;
 676         unsigned int src, dst;
 677
 678         for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
 679                 if (!quirk_alias[i] ||
 680                     sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
 681                     src != *id)
 682                         continue;
 683                 dev_info(&dev->dev,
 684                          "device (%04x:%04x): applying quirk alias %04x:%04x\n",
 685                          USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
 686                          USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
 687                 *id = dst;
 688                 return true;
 689         }
 690
 691         return false;
 692 }
 693
 694 static int check_delayed_register_option(struct snd_usb_audio *chip)
 695 {
 696         int i;
 697         unsigned int id, inum;
 698
 699         for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
 700                 if (delayed_register[i] &&
 701                     sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
 702                     id == chip->usb_id)
 703                         return inum;
 704         }
 705
 706         return -1;
 707 }
 708
 709 static const struct usb_device_id usb_audio_ids[]; /* defined below */
 710
 711 /* look for the last interface that matches with our ids and remember it */
 712 static void find_last_interface(struct snd_usb_audio *chip)
 713 {
 714         struct usb_host_config *config = chip->dev->actconfig;
 715         struct usb_interface *intf;
 716         int i;
 717
 718         if (!config)
 719                 return;
 720         for (i = 0; i < config->desc.bNumInterfaces; i++) {
 721                 intf = config->interface[i];
 722                 if (usb_match_id(intf, usb_audio_ids))
 723                         chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
 724         }
 725         usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
 726 }
 727
 728 /* look for the corresponding quirk */
 729 static const struct snd_usb_audio_quirk *
 730 get_alias_quirk(struct usb_device *dev, unsigned int id)
 731 {
 732         const struct usb_device_id *p;
 733
 734         for (p = usb_audio_ids; p->match_flags; p++) {
 735                 /* FIXME: this checks only vendor:product pair in the list */
 736                 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
 737                     USB_DEVICE_ID_MATCH_DEVICE &&
 738                     p->idVendor == USB_ID_VENDOR(id) &&
 739                     p->idProduct == USB_ID_PRODUCT(id))
 740                         return (const struct snd_usb_audio_quirk *)p->driver_info;
 741         }
 742
 743         return NULL;
 744 }
 745
 746 /* register card if we reach to the last interface or to the specified
 747  * one given via option
 748  */
 749 static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
 750 {
 751         if (check_delayed_register_option(chip) == ifnum ||
 752             chip->last_iface == ifnum ||
 753             usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface)))
 754                 return snd_card_register(chip->card);
 755         return 0;
 756 }
 757
 758 /*
 759  * probe the active usb device
 760  *
 761  * note that this can be called multiple times per a device, when it
 762  * includes multiple audio control interfaces.
 763  *
 764  * thus we check the usb device pointer and creates the card instance
 765  * only at the first time.  the successive calls of this function will
 766  * append the pcm interface to the corresponding card.
 767  */
 768 static int usb_audio_probe(struct usb_interface *intf,
 769                            const struct usb_device_id *usb_id)
 770 {
 771         struct usb_device *dev = interface_to_usbdev(intf);
 772         const struct snd_usb_audio_quirk *quirk =
 773                 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
 774         struct snd_usb_audio *chip;
 775         int i, err;
 776         struct usb_host_interface *alts;
 777         int ifnum;
 778         u32 id;
 779
 780         alts = &intf->altsetting[0];
 781         ifnum = get_iface_desc(alts)->bInterfaceNumber;
 782         id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
 783                     le16_to_cpu(dev->descriptor.idProduct));
 784         if (get_alias_id(dev, &id))
 785                 quirk = get_alias_quirk(dev, id);
 786         if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
 787                 return -ENXIO;
 788         if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
 789                 return -ENODEV;
 790
 791         err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
 792         if (err < 0)
 793                 return err;
 794
 795         /*
 796          * found a config.  now register to ALSA
 797          */
 798
 799         /* check whether it's already registered */
 800         chip = NULL;
 801         mutex_lock(&register_mutex);
 802         for (i = 0; i < SNDRV_CARDS; i++) {
 803                 if (usb_chip[i] && usb_chip[i]->dev == dev) {
 804                         if (atomic_read(&usb_chip[i]->shutdown)) {
 805                                 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
 806                                 err = -EIO;
 807                                 goto __error;
 808                         }
 809                         chip = usb_chip[i];
 810                         atomic_inc(&chip->active); /* avoid autopm */
 811                         break;
 812                 }
 813         }
 814         if (! chip) {
 815                 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
 816                 if (err < 0)
 817                         goto __error;
 818
 819                 /* it's a fresh one.
 820                  * now look for an empty slot and create a new card instance
 821                  */
 822                 for (i = 0; i < SNDRV_CARDS; i++)
 823                         if (!usb_chip[i] &&
 824                             (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
 825                             (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
 826                                 if (enable[i]) {
 827                                         err = snd_usb_audio_create(intf, dev, i, quirk,
 828                                                                    id, &chip);
 829                                         if (err < 0)
 830                                                 goto __error;
 831                                         break;
 832                                 } else if (vid[i] != -1 || pid[i] != -1) {
 833                                         dev_info(&dev->dev,
 834                                                  "device (%04x:%04x) is disabled\n",
 835                                                  USB_ID_VENDOR(id),
 836                                                  USB_ID_PRODUCT(id));
 837                                         err = -ENOENT;
 838                                         goto __error;
 839                                 }
 840                         }
 841                 if (!chip) {
 842                         dev_err(&dev->dev, "no available usb audio device\n");
 843                         err = -ENODEV;
 844                         goto __error;
 845                 }
 846                 find_last_interface(chip);
 847         }
 848
 849         if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
 850                 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
 851                 err = -EINVAL;
 852                 goto __error;
 853         }
 854
 855         dev_set_drvdata(&dev->dev, chip);
 856
 857         if (ignore_ctl_error)
 858                 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
 859
 860         if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
 861                 usb_disable_autosuspend(interface_to_usbdev(intf));
 862
 863         /*
 864          * For devices with more than one control interface, we assume the
 865          * first contains the audio controls. We might need a more specific
 866          * check here in the future.
 867          */
 868         if (!chip->ctrl_intf)
 869                 chip->ctrl_intf = alts;
 870
 871         err = 1; /* continue */
 872         if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
 873                 /* need some special handlings */
 874                 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
 875                 if (err < 0)
 876                         goto __error;
 877         }
 878
 879         if (err > 0) {
 880                 /* create normal USB audio interfaces */
 881                 err = snd_usb_create_streams(chip, ifnum);
 882                 if (err < 0)
 883                         goto __error;
 884                 err = snd_usb_create_mixer(chip, ifnum);
 885                 if (err < 0)
 886                         goto __error;
 887         }
 888
 889         if (chip->need_delayed_register) {
 890                 dev_info(&dev->dev,
 891                          "Found post-registration device assignment: %08x:%02x\n",
 892                          chip->usb_id, ifnum);
 893                 chip->need_delayed_register = false; /* clear again */
 894         }
 895
 896         err = try_to_register_card(chip, ifnum);
 897         if (err < 0)
 898                 goto __error_no_register;
 899
 900         if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
 901                 /* don't want to fail when snd_media_device_create() fails */
 902                 snd_media_device_create(chip, intf);
 903         }
 904
 905         if (quirk)
 906                 chip->quirk_type = quirk->type;
 907
 908         usb_chip[chip->index] = chip;
 909         chip->intf[chip->num_interfaces] = intf;
 910         chip->num_interfaces++;
 911         usb_set_intfdata(intf, chip);
 912         atomic_dec(&chip->active);
 913         mutex_unlock(&register_mutex);
 914         return 0;
 915
 916  __error:
 917         /* in the case of error in secondary interface, still try to register */
 918         if (chip)
 919                 try_to_register_card(chip, ifnum);
 920
 921  __error_no_register:
 922         if (chip) {
 923                 /* chip->active is inside the chip->card object,
 924                  * decrement before memory is possibly returned.
 925                  */
 926                 atomic_dec(&chip->active);
 927                 if (!chip->num_interfaces)
 928                         snd_card_free(chip->card);
 929         }
 930         mutex_unlock(&register_mutex);
 931         return err;
 932 }
 933
 934 /*
 935  * we need to take care of counter, since disconnection can be called also
 936  * many times as well as usb_audio_probe().
 937  */
 938 static void usb_audio_disconnect(struct usb_interface *intf)
 939 {
 940         struct snd_usb_audio *chip = usb_get_intfdata(intf);
 941         struct snd_card *card;
 942         struct list_head *p;
 943
 944         if (chip == USB_AUDIO_IFACE_UNUSED)
 945                 return;
 946
 947         card = chip->card;
 948
 949         mutex_lock(&register_mutex);
 950         if (atomic_inc_return(&chip->shutdown) == 1) {
 951                 struct snd_usb_stream *as;
 952                 struct snd_usb_endpoint *ep;
 953                 struct usb_mixer_interface *mixer;
 954
 955                 /* wait until all pending tasks done;
 956                  * they are protected by snd_usb_lock_shutdown()
 957                  */
 958                 wait_event(chip->shutdown_wait,
 959                            !atomic_read(&chip->usage_count));
 960                 snd_card_disconnect(card);
 961                 /* release the pcm resources */
 962                 list_for_each_entry(as, &chip->pcm_list, list) {
 963                         snd_usb_stream_disconnect(as);
 964                 }
 965                 /* release the endpoint resources */
 966                 list_for_each_entry(ep, &chip->ep_list, list) {
 967                         snd_usb_endpoint_release(ep);
 968                 }
 969                 /* release the midi resources */
 970                 list_for_each(p, &chip->midi_list) {
 971                         snd_usbmidi_disconnect(p);
 972                 }
 973                 snd_usb_midi_v2_disconnect_all(chip);
 974                 /*
 975                  * Nice to check quirk && quirk->shares_media_device and
 976                  * then call the snd_media_device_delete(). Don't have
 977                  * access to the quirk here. snd_media_device_delete()
 978                  * accesses mixer_list
 979                  */
 980                 snd_media_device_delete(chip);
 981
 982                 /* release mixer resources */
 983                 list_for_each_entry(mixer, &chip->mixer_list, list) {
 984                         snd_usb_mixer_disconnect(mixer);
 985                 }
 986         }
 987
 988         if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
 989                 usb_enable_autosuspend(interface_to_usbdev(intf));
 990
 991         chip->num_interfaces--;
 992         if (chip->num_interfaces <= 0) {
 993                 usb_chip[chip->index] = NULL;
 994                 mutex_unlock(&register_mutex);
 995                 snd_card_free_when_closed(card);
 996         } else {
 997                 mutex_unlock(&register_mutex);
 998         }
 999 }
1000
1001 /* lock the shutdown (disconnect) task and autoresume */
1002 int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1003 {
1004         int err;
1005
1006         atomic_inc(&chip->usage_count);
1007         if (atomic_read(&chip->shutdown)) {
1008                 err = -EIO;
1009                 goto error;
1010         }
1011         err = snd_usb_autoresume(chip);
1012         if (err < 0)
1013                 goto error;
1014         return 0;
1015
1016  error:
1017         if (atomic_dec_and_test(&chip->usage_count))
1018                 wake_up(&chip->shutdown_wait);
1019         return err;
1020 }
1021
1022 /* autosuspend and unlock the shutdown */
1023 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1024 {
1025         snd_usb_autosuspend(chip);
1026         if (atomic_dec_and_test(&chip->usage_count))
1027                 wake_up(&chip->shutdown_wait);
1028 }
1029
1030 int snd_usb_autoresume(struct snd_usb_audio *chip)
1031 {
1032         int i, err;
1033
1034         if (atomic_read(&chip->shutdown))
1035                 return -EIO;
1036         if (atomic_inc_return(&chip->active) != 1)
1037                 return 0;
1038
1039         for (i = 0; i < chip->num_interfaces; i++) {
1040                 err = usb_autopm_get_interface(chip->intf[i]);
1041                 if (err < 0) {
1042                         /* rollback */
1043                         while (--i >= 0)
1044                                 usb_autopm_put_interface(chip->intf[i]);
1045                         atomic_dec(&chip->active);
1046                         return err;
1047                 }
1048         }
1049         return 0;
1050 }
1051
1052 void snd_usb_autosuspend(struct snd_usb_audio *chip)
1053 {
1054         int i;
1055
1056         if (atomic_read(&chip->shutdown))
1057                 return;
1058         if (!atomic_dec_and_test(&chip->active))
1059                 return;
1060
1061         for (i = 0; i < chip->num_interfaces; i++)
1062                 usb_autopm_put_interface(chip->intf[i]);
1063 }
1064
1065 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1066 {
1067         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1068         struct snd_usb_stream *as;
1069         struct snd_usb_endpoint *ep;
1070         struct usb_mixer_interface *mixer;
1071         struct list_head *p;
1072
1073         if (chip == USB_AUDIO_IFACE_UNUSED)
1074                 return 0;
1075
1076         if (!chip->num_suspended_intf++) {
1077                 list_for_each_entry(as, &chip->pcm_list, list)
1078                         snd_usb_pcm_suspend(as);
1079                 list_for_each_entry(ep, &chip->ep_list, list)
1080                         snd_usb_endpoint_suspend(ep);
1081                 list_for_each(p, &chip->midi_list)
1082                         snd_usbmidi_suspend(p);
1083                 list_for_each_entry(mixer, &chip->mixer_list, list)
1084                         snd_usb_mixer_suspend(mixer);
1085                 snd_usb_midi_v2_suspend_all(chip);
1086         }
1087
1088         if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1089                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1090                 chip->system_suspend = chip->num_suspended_intf;
1091         }
1092
1093         return 0;
1094 }
1095
1096 static int usb_audio_resume(struct usb_interface *intf)
1097 {
1098         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1099         struct snd_usb_stream *as;
1100         struct usb_mixer_interface *mixer;
1101         struct list_head *p;
1102         int err = 0;
1103
1104         if (chip == USB_AUDIO_IFACE_UNUSED)
1105                 return 0;
1106
1107         atomic_inc(&chip->active); /* avoid autopm */
1108         if (chip->num_suspended_intf > 1)
1109                 goto out;
1110
1111         list_for_each_entry(as, &chip->pcm_list, list) {
1112                 err = snd_usb_pcm_resume(as);
1113                 if (err < 0)
1114                         goto err_out;
1115         }
1116
1117         /*
1118          * ALSA leaves material resumption to user space
1119          * we just notify and restart the mixers
1120          */
1121         list_for_each_entry(mixer, &chip->mixer_list, list) {
1122                 err = snd_usb_mixer_resume(mixer);
1123                 if (err < 0)
1124                         goto err_out;
1125         }
1126
1127         list_for_each(p, &chip->midi_list) {
1128                 snd_usbmidi_resume(p);
1129         }
1130
1131         snd_usb_midi_v2_resume_all(chip);
1132
1133  out:
1134         if (chip->num_suspended_intf == chip->system_suspend) {
1135                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1136                 chip->system_suspend = 0;
1137         }
1138         chip->num_suspended_intf--;
1139
1140 err_out:
1141         atomic_dec(&chip->active); /* allow autopm after this point */
1142         return err;
1143 }
1144
1145 static const struct usb_device_id usb_audio_ids [] = {
1146 #include "quirks-table.h"
1147     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1148       .bInterfaceClass = USB_CLASS_AUDIO,
1149       .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1150     { }                                         /* Terminating entry */
1151 };
1152 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1153
1154 /*
1155  * entry point for linux usb interface
1156  */
1157
1158 static struct usb_driver usb_audio_driver = {
1159         .name =         "snd-usb-audio",
1160         .probe =        usb_audio_probe,
1161         .disconnect =   usb_audio_disconnect,
1162         .suspend =      usb_audio_suspend,
1163         .resume =       usb_audio_resume,
1164         .reset_resume = usb_audio_resume,
1165         .id_table =     usb_audio_ids,
1166         .supports_autosuspend = 1,
1167 };
1168
1169 module_usb_driver(usb_audio_driver);