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