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)(®ister_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)(®ister_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)(®ister_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)(®ister_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(®ister_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(®ister_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(®ister_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(®ister_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(®ister_mutex); 1103 snd_card_free_when_closed(card); 1104 } else { 1105 mutex_unlock(®ister_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); 1288