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 static struct snd_usb_platform_ops *platform_ops;
 122
 123 /*
 124  * Register platform specific operations that will be notified on events
 125  * which occur in USB SND.  The platform driver can utilize this path to
 126  * enable features, such as USB audio offloading, which allows for audio data
 127  * to be queued by an audio DSP.
 128  *
 129  * Only one set of platform operations can be registered to USB SND.  The
 130  * platform register operation is protected by the register_mutex.
 131  */
 132 int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops)
 133 {
 134         guard(mutex)(&register_mutex);
 135         if (platform_ops)
 136                 return -EEXIST;
 137
 138         platform_ops = ops;
 139         return 0;
 140 }
 141 EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops);
 142
 143 /*
 144  * Unregisters the current set of platform operations.  This allows for
 145  * a new set to be registered if required.
 146  *
 147  * The platform unregister operation is protected by the register_mutex.
 148  */
 149 int snd_usb_unregister_platform_ops(void)
 150 {
 151         guard(mutex)(&register_mutex);
 152         platform_ops = NULL;
 153
 154         return 0;
 155 }
 156 EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops);
 157
 158 /*
 159  * in case the platform driver was not ready at the time of USB SND
 160  * device connect, expose an API to discover all connected USB devices
 161  * so it can populate any dependent resources/structures.
 162  */
 163 void snd_usb_rediscover_devices(void)
 164 {
 165         int i;
 166
 167         guard(mutex)(&register_mutex);
 168
 169         if (!platform_ops || !platform_ops->connect_cb)
 170                 return;
 171
 172         for (i = 0; i < SNDRV_CARDS; i++) {
 173                 if (usb_chip[i])
 174                         platform_ops->connect_cb(usb_chip[i]);
 175         }
 176 }
 177 EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices);
 178
 179 /*
 180  * Checks to see if requested audio profile, i.e sample rate, # of
 181  * channels, etc... is supported by the substream associated to the
 182  * USB audio device.
 183  */
 184 struct snd_usb_stream *
 185 snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params,
 186                                   int direction)
 187 {
 188         struct snd_usb_audio *chip;
 189         struct snd_usb_substream *subs;
 190         struct snd_usb_stream *as;
 191
 192         /*
 193          * Register mutex is held when populating and clearing usb_chip
 194          * array.
 195          */
 196         guard(mutex)(&register_mutex);
 197         chip = usb_chip[card_idx];
 198
 199         if (chip && enable[card_idx]) {
 200                 list_for_each_entry(as, &chip->pcm_list, list) {
 201                         subs = &as->substream[direction];
 202                         if (snd_usb_find_substream_format(subs, params))
 203                                 return as;
 204                 }
 205         }
 206
 207         return NULL;
 208 }
 209 EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream);
 210
 211 /*
 212  * disconnect streams
 213  * called from usb_audio_disconnect()
 214  */
 215 static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
 216 {
 217         int idx;
 218         struct snd_usb_substream *subs;
 219
 220         for (idx = 0; idx < 2; idx++) {
 221                 subs = &as->substream[idx];
 222                 if (!subs->num_formats)
 223                         continue;
 224                 subs->data_endpoint = NULL;
 225                 subs->sync_endpoint = NULL;
 226         }
 227 }
 228
 229 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
 230 {
 231         struct usb_device *dev = chip->dev;
 232         struct usb_host_interface *alts;
 233         struct usb_interface_descriptor *altsd;
 234         struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
 235
 236         if (!iface) {
 237                 dev_err(&dev->dev, "%u:%d : does not exist\n",
 238                         ctrlif, interface);
 239                 return -EINVAL;
 240         }
 241
 242         alts = &iface->altsetting[0];
 243         altsd = get_iface_desc(alts);
 244
 245         /*
 246          * Android with both accessory and audio interfaces enabled gets the
 247          * interface numbers wrong.
 248          */
 249         if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
 250              chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
 251             interface == 0 &&
 252             altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
 253             altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
 254                 interface = 2;
 255                 iface = usb_ifnum_to_if(dev, interface);
 256                 if (!iface)
 257                         return -EINVAL;
 258                 alts = &iface->altsetting[0];
 259                 altsd = get_iface_desc(alts);
 260         }
 261
 262         if (usb_interface_claimed(iface)) {
 263                 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
 264                         ctrlif, interface);
 265                 return -EINVAL;
 266         }
 267
 268         if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
 269              altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
 270             altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
 271                 int err = snd_usb_midi_v2_create(chip, iface, NULL,
 272                                                  chip->usb_id);
 273                 if (err < 0) {
 274                         dev_err(&dev->dev,
 275                                 "%u:%d: cannot create sequencer device\n",
 276                                 ctrlif, interface);
 277                         return -EINVAL;
 278                 }
 279                 return usb_driver_claim_interface(&usb_audio_driver, iface,
 280                                                   USB_AUDIO_IFACE_UNUSED);
 281         }
 282
 283         if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
 284              altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
 285             altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
 286                 dev_dbg(&dev->dev,
 287                         "%u:%d: skipping non-supported interface %d\n",
 288                         ctrlif, interface, altsd->bInterfaceClass);
 289                 /* skip non-supported classes */
 290                 return -EINVAL;
 291         }
 292
 293         if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
 294                 dev_err(&dev->dev, "low speed audio streaming not supported\n");
 295                 return -EINVAL;
 296         }
 297
 298         snd_usb_add_ctrl_interface_link(chip, interface, ctrlif);
 299
 300         if (! snd_usb_parse_audio_interface(chip, interface)) {
 301                 usb_set_interface(dev, interface, 0); /* reset the current interface */
 302                 return usb_driver_claim_interface(&usb_audio_driver, iface,
 303                                                   USB_AUDIO_IFACE_UNUSED);
 304         }
 305
 306         return 0;
 307 }
 308
 309 /*
 310  * parse audio control descriptor and create pcm/midi streams
 311  */
 312 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 313 {
 314         struct usb_device *dev = chip->dev;
 315         struct usb_host_interface *host_iface;
 316         struct usb_interface_descriptor *altsd;
 317         int i, protocol;
 318
 319         /* find audiocontrol interface */
 320         host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
 321         altsd = get_iface_desc(host_iface);
 322         protocol = altsd->bInterfaceProtocol;
 323
 324         switch (protocol) {
 325         default:
 326                 dev_warn(&dev->dev,
 327                          "unknown interface protocol %#02x, assuming v1\n",
 328                          protocol);
 329                 fallthrough;
 330
 331         case UAC_VERSION_1: {
 332                 struct uac1_ac_header_descriptor *h1;
 333                 int rest_bytes;
 334
 335                 h1 = snd_usb_find_csint_desc(host_iface->extra,
 336                                                          host_iface->extralen,
 337                                                          NULL, UAC_HEADER);
 338                 if (!h1 || h1->bLength < sizeof(*h1)) {
 339                         dev_err(&dev->dev, "cannot find UAC_HEADER\n");
 340                         return -EINVAL;
 341                 }
 342
 343                 rest_bytes = (void *)(host_iface->extra +
 344                                 host_iface->extralen) - (void *)h1;
 345
 346                 /* just to be sure -- this shouldn't hit at all */
 347                 if (rest_bytes <= 0) {
 348                         dev_err(&dev->dev, "invalid control header\n");
 349                         return -EINVAL;
 350                 }
 351
 352                 if (rest_bytes < sizeof(*h1)) {
 353                         dev_err(&dev->dev, "too short v1 buffer descriptor\n");
 354                         return -EINVAL;
 355                 }
 356
 357                 if (!h1->bInCollection) {
 358                         dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
 359                         return -EINVAL;
 360                 }
 361
 362                 if (rest_bytes < h1->bLength) {
 363                         dev_err(&dev->dev, "invalid buffer length (v1)\n");
 364                         return -EINVAL;
 365                 }
 366
 367                 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
 368                         dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
 369                         return -EINVAL;
 370                 }
 371
 372                 for (i = 0; i < h1->bInCollection; i++)
 373                         snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
 374
 375                 break;
 376         }
 377
 378         case UAC_VERSION_2:
 379         case UAC_VERSION_3: {
 380                 struct usb_interface_assoc_descriptor *assoc =
 381                         usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
 382
 383                 if (!assoc) {
 384                         /*
 385                          * Firmware writers cannot count to three.  So to find
 386                          * the IAD on the NuForce UDH-100, also check the next
 387                          * interface.
 388                          */
 389                         struct usb_interface *iface =
 390                                 usb_ifnum_to_if(dev, ctrlif + 1);
 391                         if (iface &&
 392                             iface->intf_assoc &&
 393                             iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
 394                             iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
 395                                 assoc = iface->intf_assoc;
 396                 }
 397
 398                 if (!assoc) {
 399                         dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
 400                         return -EINVAL;
 401                 }
 402
 403                 if (protocol == UAC_VERSION_3) {
 404                         int badd = assoc->bFunctionSubClass;
 405
 406                         if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
 407                             (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
 408                              badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
 409                                 dev_err(&dev->dev,
 410                                         "Unsupported UAC3 BADD profile\n");
 411                                 return -EINVAL;
 412                         }
 413
 414                         chip->badd_profile = badd;
 415                 }
 416
 417                 for (i = 0; i < assoc->bInterfaceCount; i++) {
 418                         int intf = assoc->bFirstInterface + i;
 419
 420                         if (intf != ctrlif)
 421                                 snd_usb_create_stream(chip, ctrlif, intf);
 422                 }
 423
 424                 break;
 425         }
 426         }
 427
 428         return 0;
 429 }
 430
 431 /*
 432  * Profile name preset table
 433  */
 434 struct usb_audio_device_name {
 435         u32 id;
 436         const char *vendor_name;
 437         const char *product_name;
 438         const char *profile_name;       /* override card->longname */
 439 };
 440
 441 #define PROFILE_NAME(vid, pid, vendor, product, profile)         \
 442         { .id = USB_ID(vid, pid), .vendor_name = (vendor),       \
 443           .product_name = (product), .profile_name = (profile) }
 444 #define DEVICE_NAME(vid, pid, vendor, product) \
 445         PROFILE_NAME(vid, pid, vendor, product, NULL)
 446
 447 /* vendor/product and profile name presets, sorted in device id order */
 448 static const struct usb_audio_device_name usb_audio_names[] = {
 449         /* HP Thunderbolt Dock Audio Headset */
 450         PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
 451                      "HP-Thunderbolt-Dock-Audio-Headset"),
 452         /* HP Thunderbolt Dock Audio Module */
 453         PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
 454                      "HP-Thunderbolt-Dock-Audio-Module"),
 455
 456         /* Two entries for Gigabyte TRX40 Aorus Master:
 457          * TRX40 Aorus Master has two USB-audio devices, one for the front
 458          * headphone with ESS SABRE9218 DAC chip, while another for the rest
 459          * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
 460          * Here we provide two distinct names for making UCM profiles easier.
 461          */
 462         PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
 463                      "Gigabyte-Aorus-Master-Front-Headphone"),
 464         PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
 465                      "Gigabyte-Aorus-Master-Main-Audio"),
 466
 467         /* Gigabyte TRX40 Aorus Pro WiFi */
 468         PROFILE_NAME(0x0414, 0xa002,
 469                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 470
 471         /* Creative/E-Mu devices */
 472         DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
 473         /* Creative/Toshiba Multimedia Center SB-0500 */
 474         DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
 475
 476         /* Logitech Audio Devices */
 477         DEVICE_NAME(0x046d, 0x0867, "Logitech, Inc.", "Logi-MeetUp"),
 478         DEVICE_NAME(0x046d, 0x0874, "Logitech, Inc.", "Logi-Tap-Audio"),
 479         DEVICE_NAME(0x046d, 0x087c, "Logitech, Inc.", "Logi-Huddle"),
 480         DEVICE_NAME(0x046d, 0x0898, "Logitech, Inc.", "Logi-RB-Audio"),
 481         DEVICE_NAME(0x046d, 0x08d2, "Logitech, Inc.", "Logi-RBM-Audio"),
 482         DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
 483
 484         DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
 485         DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
 486
 487         /* ASUS ROG Zenith II: this machine has also two devices, one for
 488          * the front headphone and another for the rest
 489          */
 490         PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
 491                      "Zenith-II-Front-Headphone"),
 492         PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
 493                      "Zenith-II-Main-Audio"),
 494
 495         /* ASUS ROG Strix */
 496         PROFILE_NAME(0x0b05, 0x1917,
 497                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 498         /* ASUS PRIME TRX40 PRO-S */
 499         PROFILE_NAME(0x0b05, 0x1918,
 500                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 501
 502         /* Dell WD15 Dock */
 503         PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
 504         /* Dell WD19 Dock */
 505         PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
 506
 507         DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
 508
 509         /*
 510          * The original product_name is "USB Sound Device", however this name
 511          * is also used by the CM106 based cards, so make it unique.
 512          */
 513         DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
 514         DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
 515
 516         /* MSI TRX40 Creator */
 517         PROFILE_NAME(0x0db0, 0x0d64,
 518                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 519         /* MSI TRX40 */
 520         PROFILE_NAME(0x0db0, 0x543d,
 521                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 522
 523         DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
 524
 525         /* Dock/Stand for HP Engage Go */
 526         PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock",
 527                      "HP-Engage-Go-Dock"),
 528
 529         /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
 530         DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
 531         DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
 532
 533         /* aka. Serato Scratch Live DJ Box */
 534         DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
 535
 536         /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
 537         PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
 538                      "Lenovo-ThinkStation-P620-Rear"),
 539         /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
 540         PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
 541                      "Lenovo-ThinkStation-P620-Main"),
 542
 543         /* Asrock TRX40 Creator */
 544         PROFILE_NAME(0x26ce, 0x0a01,
 545                      "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
 546
 547         DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
 548         DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
 549         DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
 550         DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
 551         DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
 552         DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
 553         DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
 554         DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
 555         DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
 556         DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
 557         DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
 558         DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
 559         DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
 560         DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
 561         DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
 562
 563         { } /* terminator */
 564 };
 565
 566 static const struct usb_audio_device_name *
 567 lookup_device_name(u32 id)
 568 {
 569         static const struct usb_audio_device_name *p;
 570
 571         for (p = usb_audio_names; p->id; p++)
 572                 if (p->id == id)
 573                         return p;
 574         return NULL;
 575 }
 576
 577 /*
 578  * free the chip instance
 579  *
 580  * here we have to do not much, since pcm and controls are already freed
 581  *
 582  */
 583
 584 static void snd_usb_audio_free(struct snd_card *card)
 585 {
 586         struct snd_usb_audio *chip = card->private_data;
 587
 588         snd_usb_endpoint_free_all(chip);
 589         snd_usb_midi_v2_free_all(chip);
 590
 591         mutex_destroy(&chip->mutex);
 592         if (!atomic_read(&chip->shutdown))
 593                 dev_set_drvdata(&chip->dev->dev, NULL);
 594 }
 595
 596 static void usb_audio_make_shortname(struct usb_device *dev,
 597                                      struct snd_usb_audio *chip,
 598                                      const struct snd_usb_audio_quirk *quirk)
 599 {
 600         struct snd_card *card = chip->card;
 601         const struct usb_audio_device_name *preset;
 602         const char *s = NULL;
 603
 604         preset = lookup_device_name(chip->usb_id);
 605         if (preset && preset->product_name)
 606                 s = preset->product_name;
 607         else if (quirk && quirk->product_name)
 608                 s = quirk->product_name;
 609         if (s && *s) {
 610                 strscpy(card->shortname, s, sizeof(card->shortname));
 611                 return;
 612         }
 613
 614         /* retrieve the device string as shortname */
 615         if (!dev->descriptor.iProduct ||
 616             usb_string(dev, dev->descriptor.iProduct,
 617                        card->shortname, sizeof(card->shortname)) <= 0) {
 618                 /* no name available from anywhere, so use ID */
 619                 sprintf(card->shortname, "USB Device %#04x:%#04x",
 620                         USB_ID_VENDOR(chip->usb_id),
 621                         USB_ID_PRODUCT(chip->usb_id));
 622         }
 623
 624         strim(card->shortname);
 625 }
 626
 627 static void usb_audio_make_longname(struct usb_device *dev,
 628                                     struct snd_usb_audio *chip,
 629                                     const struct snd_usb_audio_quirk *quirk)
 630 {
 631         struct snd_card *card = chip->card;
 632         const struct usb_audio_device_name *preset;
 633         const char *s = NULL;
 634         int len;
 635
 636         preset = lookup_device_name(chip->usb_id);
 637
 638         /* shortcut - if any pre-defined string is given, use it */
 639         if (preset && preset->profile_name)
 640                 s = preset->profile_name;
 641         if (s && *s) {
 642                 strscpy(card->longname, s, sizeof(card->longname));
 643                 return;
 644         }
 645
 646         if (preset && preset->vendor_name)
 647                 s = preset->vendor_name;
 648         else if (quirk && quirk->vendor_name)
 649                 s = quirk->vendor_name;
 650         *card->longname = 0;
 651         if (s && *s) {
 652                 strscpy(card->longname, s, sizeof(card->longname));
 653         } else {
 654                 /* retrieve the vendor and device strings as longname */
 655                 if (dev->descriptor.iManufacturer)
 656                         usb_string(dev, dev->descriptor.iManufacturer,
 657                                    card->longname, sizeof(card->longname));
 658                 /* we don't really care if there isn't any vendor string */
 659         }
 660         if (*card->longname) {
 661                 strim(card->longname);
 662                 if (*card->longname)
 663                         strlcat(card->longname, " ", sizeof(card->longname));
 664         }
 665
 666         strlcat(card->longname, card->shortname, sizeof(card->longname));
 667
 668         len = strlcat(card->longname, " at ", sizeof(card->longname));
 669
 670         if (len < sizeof(card->longname))
 671                 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
 672
 673         switch (snd_usb_get_speed(dev)) {
 674         case USB_SPEED_LOW:
 675                 strlcat(card->longname, ", low speed", sizeof(card->longname));
 676                 break;
 677         case USB_SPEED_FULL:
 678                 strlcat(card->longname, ", full speed", sizeof(card->longname));
 679                 break;
 680         case USB_SPEED_HIGH:
 681                 strlcat(card->longname, ", high speed", sizeof(card->longname));
 682                 break;
 683         case USB_SPEED_SUPER:
 684                 strlcat(card->longname, ", super speed", sizeof(card->longname));
 685                 break;
 686         case USB_SPEED_SUPER_PLUS:
 687                 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
 688                 break;
 689         default:
 690                 break;
 691         }
 692 }
 693
 694 /*
 695  * create a chip instance and set its names.
 696  */
 697 static int snd_usb_audio_create(struct usb_interface *intf,
 698                                 struct usb_device *dev, int idx,
 699                                 const struct snd_usb_audio_quirk *quirk,
 700                                 unsigned int usb_id,
 701                                 struct snd_usb_audio **rchip)
 702 {
 703         struct snd_card *card;
 704         struct snd_usb_audio *chip;
 705         int err;
 706         char component[14];
 707
 708         *rchip = NULL;
 709
 710         switch (snd_usb_get_speed(dev)) {
 711         case USB_SPEED_LOW:
 712         case USB_SPEED_FULL:
 713         case USB_SPEED_HIGH:
 714         case USB_SPEED_SUPER:
 715         case USB_SPEED_SUPER_PLUS:
 716                 break;
 717         default:
 718                 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
 719                 return -ENXIO;
 720         }
 721
 722         err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
 723                            sizeof(*chip), &card);
 724         if (err < 0) {
 725                 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
 726                 return err;
 727         }
 728
 729         chip = card->private_data;
 730         mutex_init(&chip->mutex);
 731         init_waitqueue_head(&chip->shutdown_wait);
 732         chip->index = idx;
 733         chip->dev = dev;
 734         chip->card = card;
 735         chip->setup = device_setup[idx];
 736         chip->generic_implicit_fb = implicit_fb[idx];
 737         chip->autoclock = autoclock;
 738         chip->lowlatency = lowlatency;
 739         atomic_set(&chip->active, 1); /* avoid autopm during probing */
 740         atomic_set(&chip->usage_count, 0);
 741         atomic_set(&chip->shutdown, 0);
 742
 743         chip->usb_id = usb_id;
 744         INIT_LIST_HEAD(&chip->pcm_list);
 745         INIT_LIST_HEAD(&chip->ep_list);
 746         INIT_LIST_HEAD(&chip->iface_ref_list);
 747         INIT_LIST_HEAD(&chip->clock_ref_list);
 748         INIT_LIST_HEAD(&chip->midi_list);
 749         INIT_LIST_HEAD(&chip->midi_v2_list);
 750         INIT_LIST_HEAD(&chip->mixer_list);
 751
 752         if (quirk_flags[idx])
 753                 chip->quirk_flags = quirk_flags[idx];
 754         else
 755                 snd_usb_init_quirk_flags(chip);
 756
 757         card->private_free = snd_usb_audio_free;
 758
 759         strcpy(card->driver, "USB-Audio");
 760         sprintf(component, "USB%04x:%04x",
 761                 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
 762         snd_component_add(card, component);
 763
 764         usb_audio_make_shortname(dev, chip, quirk);
 765         usb_audio_make_longname(dev, chip, quirk);
 766
 767         snd_usb_audio_create_proc(chip);
 768
 769         *rchip = chip;
 770         return 0;
 771 }
 772
 773 /* look for a matching quirk alias id */
 774 static bool get_alias_id(struct usb_device *dev, unsigned int *id)
 775 {
 776         int i;
 777         unsigned int src, dst;
 778
 779         for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
 780                 if (!quirk_alias[i] ||
 781                     sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
 782                     src != *id)
 783                         continue;
 784                 dev_info(&dev->dev,
 785                          "device (%04x:%04x): applying quirk alias %04x:%04x\n",
 786                          USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
 787                          USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
 788                 *id = dst;
 789                 return true;
 790         }
 791
 792         return false;
 793 }
 794
 795 static int check_delayed_register_option(struct snd_usb_audio *chip)
 796 {
 797         int i;
 798         unsigned int id, inum;
 799
 800         for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
 801                 if (delayed_register[i] &&
 802                     sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
 803                     id == chip->usb_id)
 804                         return inum;
 805         }
 806
 807         return -1;
 808 }
 809
 810 static const struct usb_device_id usb_audio_ids[]; /* defined below */
 811
 812 /* look for the last interface that matches with our ids and remember it */
 813 static void find_last_interface(struct snd_usb_audio *chip)
 814 {
 815         struct usb_host_config *config = chip->dev->actconfig;
 816         struct usb_interface *intf;
 817         int i;
 818
 819         if (!config)
 820                 return;
 821         for (i = 0; i < config->desc.bNumInterfaces; i++) {
 822                 intf = config->interface[i];
 823                 if (usb_match_id(intf, usb_audio_ids))
 824                         chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
 825         }
 826         usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
 827 }
 828
 829 /* look for the corresponding quirk */
 830 static const struct snd_usb_audio_quirk *
 831 get_alias_quirk(struct usb_device *dev, unsigned int id)
 832 {
 833         const struct usb_device_id *p;
 834
 835         for (p = usb_audio_ids; p->match_flags; p++) {
 836                 /* FIXME: this checks only vendor:product pair in the list */
 837                 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
 838                     USB_DEVICE_ID_MATCH_DEVICE &&
 839                     p->idVendor == USB_ID_VENDOR(id) &&
 840                     p->idProduct == USB_ID_PRODUCT(id))
 841                         return (const struct snd_usb_audio_quirk *)p->driver_info;
 842         }
 843
 844         return NULL;
 845 }
 846
 847 /* register card if we reach to the last interface or to the specified
 848  * one given via option
 849  */
 850 static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
 851 {
 852         if (check_delayed_register_option(chip) == ifnum ||
 853             chip->last_iface == ifnum ||
 854             usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface)))
 855                 return snd_card_register(chip->card);
 856         return 0;
 857 }
 858
 859 /*
 860  * probe the active usb device
 861  *
 862  * note that this can be called multiple times per a device, when it
 863  * includes multiple audio control interfaces.
 864  *
 865  * thus we check the usb device pointer and creates the card instance
 866  * only at the first time.  the successive calls of this function will
 867  * append the pcm interface to the corresponding card.
 868  */
 869 static int usb_audio_probe(struct usb_interface *intf,
 870                            const struct usb_device_id *usb_id)
 871 {
 872         struct usb_device *dev = interface_to_usbdev(intf);
 873         const struct snd_usb_audio_quirk *quirk =
 874                 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
 875         struct snd_usb_audio *chip;
 876         int i, err;
 877         struct usb_host_interface *alts;
 878         int ifnum;
 879         u32 id;
 880
 881         alts = &intf->altsetting[0];
 882         ifnum = get_iface_desc(alts)->bInterfaceNumber;
 883         id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
 884                     le16_to_cpu(dev->descriptor.idProduct));
 885         if (get_alias_id(dev, &id))
 886                 quirk = get_alias_quirk(dev, id);
 887         if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
 888                 return -ENXIO;
 889         if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
 890                 return -ENODEV;
 891
 892         err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
 893         if (err < 0)
 894                 return err;
 895
 896         /*
 897          * found a config.  now register to ALSA
 898          */
 899
 900         /* check whether it's already registered */
 901         chip = NULL;
 902         mutex_lock(&register_mutex);
 903         for (i = 0; i < SNDRV_CARDS; i++) {
 904                 if (usb_chip[i] && usb_chip[i]->dev == dev) {
 905                         if (atomic_read(&usb_chip[i]->shutdown)) {
 906                                 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
 907                                 err = -EIO;
 908                                 goto __error;
 909                         }
 910                         chip = usb_chip[i];
 911                         atomic_inc(&chip->active); /* avoid autopm */
 912                         break;
 913                 }
 914         }
 915         if (! chip) {
 916                 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
 917                 if (err < 0)
 918                         goto __error;
 919
 920                 /* it's a fresh one.
 921                  * now look for an empty slot and create a new card instance
 922                  */
 923                 for (i = 0; i < SNDRV_CARDS; i++)
 924                         if (!usb_chip[i] &&
 925                             (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
 926                             (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
 927                                 if (enable[i]) {
 928                                         err = snd_usb_audio_create(intf, dev, i, quirk,
 929                                                                    id, &chip);
 930                                         if (err < 0)
 931                                                 goto __error;
 932                                         break;
 933                                 } else if (vid[i] != -1 || pid[i] != -1) {
 934                                         dev_info(&dev->dev,
 935                                                  "device (%04x:%04x) is disabled\n",
 936                                                  USB_ID_VENDOR(id),
 937                                                  USB_ID_PRODUCT(id));
 938                                         err = -ENOENT;
 939                                         goto __error;
 940                                 }
 941                         }
 942                 if (!chip) {
 943                         dev_err(&dev->dev, "no available usb audio device\n");
 944                         err = -ENODEV;
 945                         goto __error;
 946                 }
 947                 find_last_interface(chip);
 948         }
 949
 950         if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
 951                 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
 952                 err = -EINVAL;
 953                 goto __error;
 954         }
 955
 956         dev_set_drvdata(&dev->dev, chip);
 957
 958         if (ignore_ctl_error)
 959                 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
 960
 961         if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
 962                 usb_disable_autosuspend(interface_to_usbdev(intf));
 963
 964         /*
 965          * For devices with more than one control interface, we assume the
 966          * first contains the audio controls. We might need a more specific
 967          * check here in the future.
 968          */
 969         if (!chip->ctrl_intf)
 970                 chip->ctrl_intf = alts;
 971
 972         err = 1; /* continue */
 973         if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
 974                 /* need some special handlings */
 975                 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
 976                 if (err < 0)
 977                         goto __error;
 978         }
 979
 980         if (err > 0) {
 981                 /* create normal USB audio interfaces */
 982                 err = snd_usb_create_streams(chip, ifnum);
 983                 if (err < 0)
 984                         goto __error;
 985                 err = snd_usb_create_mixer(chip, ifnum);
 986                 if (err < 0)
 987                         goto __error;
 988         }
 989
 990         if (chip->need_delayed_register) {
 991                 dev_info(&dev->dev,
 992                          "Found post-registration device assignment: %08x:%02x\n",
 993                          chip->usb_id, ifnum);
 994                 chip->need_delayed_register = false; /* clear again */
 995         }
 996
 997         err = try_to_register_card(chip, ifnum);
 998         if (err < 0)
 999                 goto __error_no_register;
1000
1001         if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
1002                 /* don't want to fail when snd_media_device_create() fails */
1003                 snd_media_device_create(chip, intf);
1004         }
1005
1006         if (quirk)
1007                 chip->quirk_type = quirk->type;
1008
1009         usb_chip[chip->index] = chip;
1010         chip->intf[chip->num_interfaces] = intf;
1011         chip->num_interfaces++;
1012         usb_set_intfdata(intf, chip);
1013         atomic_dec(&chip->active);
1014
1015         if (platform_ops && platform_ops->connect_cb)
1016                 platform_ops->connect_cb(chip);
1017         mutex_unlock(&register_mutex);
1018
1019         return 0;
1020
1021  __error:
1022         /* in the case of error in secondary interface, still try to register */
1023         if (chip)
1024                 try_to_register_card(chip, ifnum);
1025
1026  __error_no_register:
1027         if (chip) {
1028                 /* chip->active is inside the chip->card object,
1029                  * decrement before memory is possibly returned.
1030                  */
1031                 atomic_dec(&chip->active);
1032                 if (!chip->num_interfaces)
1033                         snd_card_free(chip->card);
1034         }
1035         mutex_unlock(&register_mutex);
1036         return err;
1037 }
1038
1039 /*
1040  * we need to take care of counter, since disconnection can be called also
1041  * many times as well as usb_audio_probe().
1042  */
1043 static void usb_audio_disconnect(struct usb_interface *intf)
1044 {
1045         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1046         struct snd_card *card;
1047         struct list_head *p;
1048
1049         if (chip == USB_AUDIO_IFACE_UNUSED)
1050                 return;
1051
1052         card = chip->card;
1053
1054         mutex_lock(&register_mutex);
1055         if (platform_ops && platform_ops->disconnect_cb)
1056                 platform_ops->disconnect_cb(chip);
1057
1058         if (atomic_inc_return(&chip->shutdown) == 1) {
1059                 struct snd_usb_stream *as;
1060                 struct snd_usb_endpoint *ep;
1061                 struct usb_mixer_interface *mixer;
1062
1063                 /* wait until all pending tasks done;
1064                  * they are protected by snd_usb_lock_shutdown()
1065                  */
1066                 wait_event(chip->shutdown_wait,
1067                            !atomic_read(&chip->usage_count));
1068                 snd_card_disconnect(card);
1069                 /* release the pcm resources */
1070                 list_for_each_entry(as, &chip->pcm_list, list) {
1071                         snd_usb_stream_disconnect(as);
1072                 }
1073                 /* release the endpoint resources */
1074                 list_for_each_entry(ep, &chip->ep_list, list) {
1075                         snd_usb_endpoint_release(ep);
1076                 }
1077                 /* release the midi resources */
1078                 list_for_each(p, &chip->midi_list) {
1079                         snd_usbmidi_disconnect(p);
1080                 }
1081                 snd_usb_midi_v2_disconnect_all(chip);
1082                 /*
1083                  * Nice to check quirk && quirk->shares_media_device and
1084                  * then call the snd_media_device_delete(). Don't have
1085                  * access to the quirk here. snd_media_device_delete()
1086                  * accesses mixer_list
1087                  */
1088                 snd_media_device_delete(chip);
1089
1090                 /* release mixer resources */
1091                 list_for_each_entry(mixer, &chip->mixer_list, list) {
1092                         snd_usb_mixer_disconnect(mixer);
1093                 }
1094         }
1095
1096         if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
1097                 usb_enable_autosuspend(interface_to_usbdev(intf));
1098
1099         chip->num_interfaces--;
1100         if (chip->num_interfaces <= 0) {
1101                 usb_chip[chip->index] = NULL;
1102                 mutex_unlock(&register_mutex);
1103                 snd_card_free_when_closed(card);
1104         } else {
1105                 mutex_unlock(&register_mutex);
1106         }
1107 }
1108
1109 /* lock the shutdown (disconnect) task and autoresume */
1110 int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1111 {
1112         int err;
1113
1114         atomic_inc(&chip->usage_count);
1115         if (atomic_read(&chip->shutdown)) {
1116                 err = -EIO;
1117                 goto error;
1118         }
1119         err = snd_usb_autoresume(chip);
1120         if (err < 0)
1121                 goto error;
1122         return 0;
1123
1124  error:
1125         if (atomic_dec_and_test(&chip->usage_count))
1126                 wake_up(&chip->shutdown_wait);
1127         return err;
1128 }
1129 EXPORT_SYMBOL_GPL(snd_usb_lock_shutdown);
1130
1131 /* autosuspend and unlock the shutdown */
1132 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1133 {
1134         snd_usb_autosuspend(chip);
1135         if (atomic_dec_and_test(&chip->usage_count))
1136                 wake_up(&chip->shutdown_wait);
1137 }
1138 EXPORT_SYMBOL_GPL(snd_usb_unlock_shutdown);
1139
1140 int snd_usb_autoresume(struct snd_usb_audio *chip)
1141 {
1142         int i, err;
1143
1144         if (atomic_read(&chip->shutdown))
1145                 return -EIO;
1146         if (atomic_inc_return(&chip->active) != 1)
1147                 return 0;
1148
1149         for (i = 0; i < chip->num_interfaces; i++) {
1150                 err = usb_autopm_get_interface(chip->intf[i]);
1151                 if (err < 0) {
1152                         /* rollback */
1153                         while (--i >= 0)
1154                                 usb_autopm_put_interface(chip->intf[i]);
1155                         atomic_dec(&chip->active);
1156                         return err;
1157                 }
1158         }
1159         return 0;
1160 }
1161 EXPORT_SYMBOL_GPL(snd_usb_autoresume);
1162
1163 void snd_usb_autosuspend(struct snd_usb_audio *chip)
1164 {
1165         int i;
1166
1167         if (atomic_read(&chip->shutdown))
1168                 return;
1169         if (!atomic_dec_and_test(&chip->active))
1170                 return;
1171
1172         for (i = 0; i < chip->num_interfaces; i++)
1173                 usb_autopm_put_interface(chip->intf[i]);
1174 }
1175 EXPORT_SYMBOL_GPL(snd_usb_autosuspend);
1176
1177 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1178 {
1179         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1180         struct snd_usb_stream *as;
1181         struct snd_usb_endpoint *ep;
1182         struct usb_mixer_interface *mixer;
1183         struct list_head *p;
1184
1185         if (chip == USB_AUDIO_IFACE_UNUSED)
1186                 return 0;
1187
1188         if (!chip->num_suspended_intf++) {
1189                 list_for_each_entry(as, &chip->pcm_list, list)
1190                         snd_usb_pcm_suspend(as);
1191                 list_for_each_entry(ep, &chip->ep_list, list)
1192                         snd_usb_endpoint_suspend(ep);
1193                 list_for_each(p, &chip->midi_list)
1194                         snd_usbmidi_suspend(p);
1195                 list_for_each_entry(mixer, &chip->mixer_list, list)
1196                         snd_usb_mixer_suspend(mixer);
1197                 snd_usb_midi_v2_suspend_all(chip);
1198         }
1199
1200         if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1201                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1202                 chip->system_suspend = chip->num_suspended_intf;
1203         }
1204
1205         if (platform_ops && platform_ops->suspend_cb)
1206                 platform_ops->suspend_cb(intf, message);
1207
1208         return 0;
1209 }
1210
1211 static int usb_audio_resume(struct usb_interface *intf)
1212 {
1213         struct snd_usb_audio *chip = usb_get_intfdata(intf);
1214         struct snd_usb_stream *as;
1215         struct usb_mixer_interface *mixer;
1216         struct list_head *p;
1217         int err = 0;
1218
1219         if (chip == USB_AUDIO_IFACE_UNUSED)
1220                 return 0;
1221
1222         atomic_inc(&chip->active); /* avoid autopm */
1223         if (chip->num_suspended_intf > 1)
1224                 goto out;
1225
1226         list_for_each_entry(as, &chip->pcm_list, list) {
1227                 err = snd_usb_pcm_resume(as);
1228                 if (err < 0)
1229                         goto err_out;
1230         }
1231
1232         /*
1233          * ALSA leaves material resumption to user space
1234          * we just notify and restart the mixers
1235          */
1236         list_for_each_entry(mixer, &chip->mixer_list, list) {
1237                 err = snd_usb_mixer_resume(mixer);
1238                 if (err < 0)
1239                         goto err_out;
1240         }
1241
1242         list_for_each(p, &chip->midi_list) {
1243                 snd_usbmidi_resume(p);
1244         }
1245
1246         snd_usb_midi_v2_resume_all(chip);
1247
1248         if (platform_ops && platform_ops->resume_cb)
1249                 platform_ops->resume_cb(intf);
1250
1251  out:
1252         if (chip->num_suspended_intf == chip->system_suspend) {
1253                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1254                 chip->system_suspend = 0;
1255         }
1256         chip->num_suspended_intf--;
1257
1258 err_out:
1259         atomic_dec(&chip->active); /* allow autopm after this point */
1260         return err;
1261 }
1262
1263 static const struct usb_device_id usb_audio_ids [] = {
1264 #include "quirks-table.h"
1265     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1266       .bInterfaceClass = USB_CLASS_AUDIO,
1267       .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1268     { }                                         /* Terminating entry */
1269 };
1270 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1271
1272 /*
1273  * entry point for linux usb interface
1274  */
1275
1276 static struct usb_driver usb_audio_driver = {
1277         .name =         "snd-usb-audio",
1278         .probe =        usb_audio_probe,
1279         .disconnect =   usb_audio_disconnect,
1280         .suspend =      usb_audio_suspend,
1281         .resume =       usb_audio_resume,
1282         .reset_resume = usb_audio_resume,
1283         .id_table =     usb_audio_ids,
1284         .supports_autosuspend = 1,
1285 };
1286
1287 module_usb_driver(usb_audio_driver);