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 59MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); 60MODULE_DESCRIPTION("USB Audio"); 61MODULE_LICENSE("GPL"); 62 63static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 64static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 65static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ 66/* Vendor/product IDs for this card */ 67static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; 68static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; 69static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ 70static bool ignore_ctl_error; 71static bool autoclock = true; 72static bool lowlatency = true; 73static char *quirk_alias[SNDRV_CARDS]; 74static char *delayed_register[SNDRV_CARDS]; 75static bool implicit_fb[SNDRV_CARDS]; 76static unsigned int quirk_flags[SNDRV_CARDS]; 77 78bool snd_usb_use_vmalloc = true; 79bool snd_usb_skip_validation; 80 81module_param_array(index, int, NULL, 0444); 82MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); 83module_param_array(id, charp, NULL, 0444); 84MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); 85module_param_array(enable, bool, NULL, 0444); 86MODULE_PARM_DESC(enable, "Enable USB audio adapter."); 87module_param_array(vid, int, NULL, 0444); 88MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); 89module_param_array(pid, int, NULL, 0444); 90MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); 91module_param_array(device_setup, int, NULL, 0444); 92MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); 93module_param(ignore_ctl_error, bool, 0444); 94MODULE_PARM_DESC(ignore_ctl_error, 95 "Ignore errors from USB controller for mixer interfaces."); 96module_param(autoclock, bool, 0444); 97MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); 98module_param(lowlatency, bool, 0444); 99MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes)."); 100module_param_array(quirk_alias, charp, NULL, 0444); 101MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef."); 102module_param_array(delayed_register, charp, NULL, 0444); 103MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4."); 104module_param_array(implicit_fb, bool, NULL, 0444); 105MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode."); 106module_param_array(quirk_flags, uint, NULL, 0444); 107MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags."); 108module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444); 109MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes)."); 110module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444); 111MODULE_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 118static DEFINE_MUTEX(register_mutex); 119static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; 120static struct usb_driver usb_audio_driver; 121 122/* 123 * disconnect streams 124 * called from usb_audio_disconnect() 125 */ 126static void snd_usb_stream_disconnect(struct snd_usb_stream *as) 127{ 128 int idx; 129 struct snd_usb_substream *subs; 130 131 for (idx = 0; idx < 2; idx++) { 132 subs = &as->substream[idx]; 133 if (!subs->num_formats) 134 continue; 135 subs->data_endpoint = NULL; 136 subs->sync_endpoint = NULL; 137 } 138} 139 140static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) 141{ 142 struct usb_device *dev = chip->dev; 143 struct usb_host_interface *alts; 144 struct usb_interface_descriptor *altsd; 145 struct usb_interface *iface = usb_ifnum_to_if(dev, interface); 146 147 if (!iface) { 148 dev_err(&dev->dev, "%u:%d : does not exist\n", 149 ctrlif, interface); 150 return -EINVAL; 151 } 152 153 alts = &iface->altsetting[0]; 154 altsd = get_iface_desc(alts); 155 156 /* 157 * Android with both accessory and audio interfaces enabled gets the 158 * interface numbers wrong. 159 */ 160 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || 161 chip->usb_id == USB_ID(0x18d1, 0x2d05)) && 162 interface == 0 && 163 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && 164 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { 165 interface = 2; 166 iface = usb_ifnum_to_if(dev, interface); 167 if (!iface) 168 return -EINVAL; 169 alts = &iface->altsetting[0]; 170 altsd = get_iface_desc(alts); 171 } 172 173 if (usb_interface_claimed(iface)) { 174 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", 175 ctrlif, interface); 176 return -EINVAL; 177 } 178 179 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || 180 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && 181 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { 182 int err = snd_usb_midi_v2_create(chip, iface, NULL, 183 chip->usb_id); 184 if (err < 0) { 185 dev_err(&dev->dev, 186 "%u:%d: cannot create sequencer device\n", 187 ctrlif, interface); 188 return -EINVAL; 189 } 190 return usb_driver_claim_interface(&usb_audio_driver, iface, 191 USB_AUDIO_IFACE_UNUSED); 192 } 193 194 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && 195 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || 196 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { 197 dev_dbg(&dev->dev, 198 "%u:%d: skipping non-supported interface %d\n", 199 ctrlif, interface, altsd->bInterfaceClass); 200 /* skip non-supported classes */ 201 return -EINVAL; 202 } 203 204 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { 205 dev_err(&dev->dev, "low speed audio streaming not supported\n"); 206 return -EINVAL; 207 } 208 209 if (! snd_usb_parse_audio_interface(chip, interface)) { 210 usb_set_interface(dev, interface, 0); /* reset the current interface */ 211 return usb_driver_claim_interface(&usb_audio_driver, iface, 212 USB_AUDIO_IFACE_UNUSED); 213 } 214 215 return 0; 216} 217 218/* 219 * parse audio control descriptor and create pcm/midi streams 220 */ 221static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) 222{ 223 struct usb_device *dev = chip->dev; 224 struct usb_host_interface *host_iface; 225 struct usb_interface_descriptor *altsd; 226 int i, protocol; 227 228 /* find audiocontrol interface */ 229 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; 230 altsd = get_iface_desc(host_iface); 231 protocol = altsd->bInterfaceProtocol; 232 233 switch (protocol) { 234 default: 235 dev_warn(&dev->dev, 236 "unknown interface protocol %#02x, assuming v1\n", 237 protocol); 238 fallthrough; 239 240 case UAC_VERSION_1: { 241 struct uac1_ac_header_descriptor *h1; 242 int rest_bytes; 243 244 h1 = snd_usb_find_csint_desc(host_iface->extra, 245 host_iface->extralen, 246 NULL, UAC_HEADER); 247 if (!h1 || h1->bLength < sizeof(*h1)) { 248 dev_err(&dev->dev, "cannot find UAC_HEADER\n"); 249 return -EINVAL; 250 } 251 252 rest_bytes = (void *)(host_iface->extra + 253 host_iface->extralen) - (void *)h1; 254 255 /* just to be sure -- this shouldn't hit at all */ 256 if (rest_bytes <= 0) { 257 dev_err(&dev->dev, "invalid control header\n"); 258 return -EINVAL; 259 } 260 261 if (rest_bytes < sizeof(*h1)) { 262 dev_err(&dev->dev, "too short v1 buffer descriptor\n"); 263 return -EINVAL; 264 } 265 266 if (!h1->bInCollection) { 267 dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); 268 return -EINVAL; 269 } 270 271 if (rest_bytes < h1->bLength) { 272 dev_err(&dev->dev, "invalid buffer length (v1)\n"); 273 return -EINVAL; 274 } 275 276 if (h1->bLength < sizeof(*h1) + h1->bInCollection) { 277 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); 278 return -EINVAL; 279 } 280 281 for (i = 0; i < h1->bInCollection; i++) 282 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); 283 284 break; 285 } 286 287 case UAC_VERSION_2: 288 case UAC_VERSION_3: { 289 struct usb_interface_assoc_descriptor *assoc = 290 usb_ifnum_to_if(dev, ctrlif)->intf_assoc; 291 292 if (!assoc) { 293 /* 294 * Firmware writers cannot count to three. So to find 295 * the IAD on the NuForce UDH-100, also check the next 296 * interface. 297 */ 298 struct usb_interface *iface = 299 usb_ifnum_to_if(dev, ctrlif + 1); 300 if (iface && 301 iface->intf_assoc && 302 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && 303 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) 304 assoc = iface->intf_assoc; 305 } 306 307 if (!assoc) { 308 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n"); 309 return -EINVAL; 310 } 311 312 if (protocol == UAC_VERSION_3) { 313 int badd = assoc->bFunctionSubClass; 314 315 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 && 316 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO || 317 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) { 318 dev_err(&dev->dev, 319 "Unsupported UAC3 BADD profile\n"); 320 return -EINVAL; 321 } 322 323 chip->badd_profile = badd; 324 } 325 326 for (i = 0; i < assoc->bInterfaceCount; i++) { 327 int intf = assoc->bFirstInterface + i; 328 329 if (intf != ctrlif) 330 snd_usb_create_stream(chip, ctrlif, intf); 331 } 332 333 break; 334 } 335 } 336 337 return 0; 338} 339 340/* 341 * Profile name preset table 342 */ 343struct usb_audio_device_name { 344 u32 id; 345 const char *vendor_name; 346 const char *product_name; 347 const char *profile_name; /* override card->longname */ 348}; 349 350#define PROFILE_NAME(vid, pid, vendor, product, profile) \ 351 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \ 352 .product_name = (product), .profile_name = (profile) } 353#define DEVICE_NAME(vid, pid, vendor, product) \ 354 PROFILE_NAME(vid, pid, vendor, product, NULL) 355 356/* vendor/product and profile name presets, sorted in device id order */ 357static const struct usb_audio_device_name usb_audio_names[] = { 358 /* HP Thunderbolt Dock Audio Headset */ 359 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset", 360 "HP-Thunderbolt-Dock-Audio-Headset"), 361 /* HP Thunderbolt Dock Audio Module */ 362 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module", 363 "HP-Thunderbolt-Dock-Audio-Module"), 364 365 /* Two entries for Gigabyte TRX40 Aorus Master: 366 * TRX40 Aorus Master has two USB-audio devices, one for the front 367 * headphone with ESS SABRE9218 DAC chip, while another for the rest 368 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB. 369 * Here we provide two distinct names for making UCM profiles easier. 370 */ 371 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone", 372 "Gigabyte-Aorus-Master-Front-Headphone"), 373 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio", 374 "Gigabyte-Aorus-Master-Main-Audio"), 375 376 /* Gigabyte TRX40 Aorus Pro WiFi */ 377 PROFILE_NAME(0x0414, 0xa002, 378 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 379 380 /* Creative/E-Mu devices */ 381 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"), 382 /* Creative/Toshiba Multimedia Center SB-0500 */ 383 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"), 384 385 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"), 386 387 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"), 388 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"), 389 390 /* ASUS ROG Zenith II: this machine has also two devices, one for 391 * the front headphone and another for the rest 392 */ 393 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone", 394 "Zenith-II-Front-Headphone"), 395 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio", 396 "Zenith-II-Main-Audio"), 397 398 /* ASUS ROG Strix */ 399 PROFILE_NAME(0x0b05, 0x1917, 400 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 401 /* ASUS PRIME TRX40 PRO-S */ 402 PROFILE_NAME(0x0b05, 0x1918, 403 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 404 405 /* Dell WD15 Dock */ 406 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"), 407 /* Dell WD19 Dock */ 408 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"), 409 410 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"), 411 412 /* 413 * The original product_name is "USB Sound Device", however this name 414 * is also used by the CM106 based cards, so make it unique. 415 */ 416 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"), 417 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"), 418 419 /* MSI TRX40 Creator */ 420 PROFILE_NAME(0x0db0, 0x0d64, 421 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 422 /* MSI TRX40 */ 423 PROFILE_NAME(0x0db0, 0x543d, 424 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 425 426 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"), 427 428 /* Dock/Stand for HP Engage Go */ 429 PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock", 430 "HP-Engage-Go-Dock"), 431 432 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */ 433 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"), 434 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"), 435 436 /* aka. Serato Scratch Live DJ Box */ 437 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"), 438 439 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */ 440 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear", 441 "Lenovo-ThinkStation-P620-Rear"), 442 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */ 443 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main", 444 "Lenovo-ThinkStation-P620-Main"), 445 446 /* Asrock TRX40 Creator */ 447 PROFILE_NAME(0x26ce, 0x0a01, 448 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 449 450 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"), 451 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"), 452 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"), 453 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"), 454 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"), 455 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"), 456 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"), 457 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"), 458 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"), 459 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"), 460 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"), 461 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"), 462 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"), 463 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"), 464 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"), 465 466 { } /* terminator */ 467}; 468 469static const struct usb_audio_device_name * 470lookup_device_name(u32 id) 471{ 472 static const struct usb_audio_device_name *p; 473 474 for (p = usb_audio_names; p->id; p++) 475 if (p->id == id) 476 return p; 477 return NULL; 478} 479 480/* 481 * free the chip instance 482 * 483 * here we have to do not much, since pcm and controls are already freed 484 * 485 */ 486 487static void snd_usb_audio_free(struct snd_card *card) 488{ 489 struct snd_usb_audio *chip = card->private_data; 490 491 snd_usb_endpoint_free_all(chip); 492 snd_usb_midi_v2_free_all(chip); 493 494 mutex_destroy(&chip->mutex); 495 if (!atomic_read(&chip->shutdown)) 496 dev_set_drvdata(&chip->dev->dev, NULL); 497} 498 499static void usb_audio_make_shortname(struct usb_device *dev, 500 struct snd_usb_audio *chip, 501 const struct snd_usb_audio_quirk *quirk) 502{ 503 struct snd_card *card = chip->card; 504 const struct usb_audio_device_name *preset; 505 const char *s = NULL; 506 507 preset = lookup_device_name(chip->usb_id); 508 if (preset && preset->product_name) 509 s = preset->product_name; 510 else if (quirk && quirk->product_name) 511 s = quirk->product_name; 512 if (s && *s) { 513 strscpy(card->shortname, s, sizeof(card->shortname)); 514 return; 515 } 516 517 /* retrieve the device string as shortname */ 518 if (!dev->descriptor.iProduct || 519 usb_string(dev, dev->descriptor.iProduct, 520 card->shortname, sizeof(card->shortname)) <= 0) { 521 /* no name available from anywhere, so use ID */ 522 sprintf(card->shortname, "USB Device %#04x:%#04x", 523 USB_ID_VENDOR(chip->usb_id), 524 USB_ID_PRODUCT(chip->usb_id)); 525 } 526 527 strim(card->shortname); 528} 529 530static void usb_audio_make_longname(struct usb_device *dev, 531 struct snd_usb_audio *chip, 532 const struct snd_usb_audio_quirk *quirk) 533{ 534 struct snd_card *card = chip->card; 535 const struct usb_audio_device_name *preset; 536 const char *s = NULL; 537 int len; 538 539 preset = lookup_device_name(chip->usb_id); 540 541 /* shortcut - if any pre-defined string is given, use it */ 542 if (preset && preset->profile_name) 543 s = preset->profile_name; 544 if (s && *s) { 545 strscpy(card->longname, s, sizeof(card->longname)); 546 return; 547 } 548 549 if (preset && preset->vendor_name) 550 s = preset->vendor_name; 551 else if (quirk && quirk->vendor_name) 552 s = quirk->vendor_name; 553 *card->longname = 0; 554 if (s && *s) { 555 strscpy(card->longname, s, sizeof(card->longname)); 556 } else { 557 /* retrieve the vendor and device strings as longname */ 558 if (dev->descriptor.iManufacturer) 559 usb_string(dev, dev->descriptor.iManufacturer, 560 card->longname, sizeof(card->longname)); 561 /* we don't really care if there isn't any vendor string */ 562 } 563 if (*card->longname) { 564 strim(card->longname); 565 if (*card->longname) 566 strlcat(card->longname, " ", sizeof(card->longname)); 567 } 568 569 strlcat(card->longname, card->shortname, sizeof(card->longname)); 570 571 len = strlcat(card->longname, " at ", sizeof(card->longname)); 572 573 if (len < sizeof(card->longname)) 574 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); 575 576 switch (snd_usb_get_speed(dev)) { 577 case USB_SPEED_LOW: 578 strlcat(card->longname, ", low speed", sizeof(card->longname)); 579 break; 580 case USB_SPEED_FULL: 581 strlcat(card->longname, ", full speed", sizeof(card->longname)); 582 break; 583 case USB_SPEED_HIGH: 584 strlcat(card->longname, ", high speed", sizeof(card->longname)); 585 break; 586 case USB_SPEED_SUPER: 587 strlcat(card->longname, ", super speed", sizeof(card->longname)); 588 break; 589 case USB_SPEED_SUPER_PLUS: 590 strlcat(card->longname, ", super speed plus", sizeof(card->longname)); 591 break; 592 default: 593 break; 594 } 595} 596 597/* 598 * create a chip instance and set its names. 599 */ 600static int snd_usb_audio_create(struct usb_interface *intf, 601 struct usb_device *dev, int idx, 602 const struct snd_usb_audio_quirk *quirk, 603 unsigned int usb_id, 604 struct snd_usb_audio **rchip) 605{ 606 struct snd_card *card; 607 struct snd_usb_audio *chip; 608 int err; 609 char component[14]; 610 611 *rchip = NULL; 612 613 switch (snd_usb_get_speed(dev)) { 614 case USB_SPEED_LOW: 615 case USB_SPEED_FULL: 616 case USB_SPEED_HIGH: 617 case USB_SPEED_SUPER: 618 case USB_SPEED_SUPER_PLUS: 619 break; 620 default: 621 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); 622 return -ENXIO; 623 } 624 625 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, 626 sizeof(*chip), &card); 627 if (err < 0) { 628 dev_err(&dev->dev, "cannot create card instance %d\n", idx); 629 return err; 630 } 631 632 chip = card->private_data; 633 mutex_init(&chip->mutex); 634 init_waitqueue_head(&chip->shutdown_wait); 635 chip->index = idx; 636 chip->dev = dev; 637 chip->card = card; 638 chip->setup = device_setup[idx]; 639 chip->generic_implicit_fb = implicit_fb[idx]; 640 chip->autoclock = autoclock; 641 chip->lowlatency = lowlatency; 642 atomic_set(&chip->active, 1); /* avoid autopm during probing */ 643 atomic_set(&chip->usage_count, 0); 644 atomic_set(&chip->shutdown, 0); 645 646 chip->usb_id = usb_id; 647 INIT_LIST_HEAD(&chip->pcm_list); 648 INIT_LIST_HEAD(&chip->ep_list); 649 INIT_LIST_HEAD(&chip->iface_ref_list); 650 INIT_LIST_HEAD(&chip->clock_ref_list); 651 INIT_LIST_HEAD(&chip->midi_list); 652 INIT_LIST_HEAD(&chip->midi_v2_list); 653 INIT_LIST_HEAD(&chip->mixer_list); 654 655 if (quirk_flags[idx]) 656 chip->quirk_flags = quirk_flags[idx]; 657 else 658 snd_usb_init_quirk_flags(chip); 659 660 card->private_free = snd_usb_audio_free; 661 662 strcpy(card->driver, "USB-Audio"); 663 sprintf(component, "USB%04x:%04x", 664 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); 665 snd_component_add(card, component); 666 667 usb_audio_make_shortname(dev, chip, quirk); 668 usb_audio_make_longname(dev, chip, quirk); 669 670 snd_usb_audio_create_proc(chip); 671 672 *rchip = chip; 673 return 0; 674} 675 676/* look for a matching quirk alias id */ 677static bool get_alias_id(struct usb_device *dev, unsigned int *id) 678{ 679 int i; 680 unsigned int src, dst; 681 682 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { 683 if (!quirk_alias[i] || 684 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || 685 src != *id) 686 continue; 687 dev_info(&dev->dev, 688 "device (%04x:%04x): applying quirk alias %04x:%04x\n", 689 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), 690 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); 691 *id = dst; 692 return true; 693 } 694 695 return false; 696} 697 698static int check_delayed_register_option(struct snd_usb_audio *chip) 699{ 700 int i; 701 unsigned int id, inum; 702 703 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) { 704 if (delayed_register[i] && 705 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 && 706 id == chip->usb_id) 707 return inum; 708 } 709 710 return -1; 711} 712 713static const struct usb_device_id usb_audio_ids[]; /* defined below */ 714 715/* look for the last interface that matches with our ids and remember it */ 716static void find_last_interface(struct snd_usb_audio *chip) 717{ 718 struct usb_host_config *config = chip->dev->actconfig; 719 struct usb_interface *intf; 720 int i; 721 722 if (!config) 723 return; 724 for (i = 0; i < config->desc.bNumInterfaces; i++) { 725 intf = config->interface[i]; 726 if (usb_match_id(intf, usb_audio_ids)) 727 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber; 728 } 729 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface); 730} 731 732/* look for the corresponding quirk */ 733static const struct snd_usb_audio_quirk * 734get_alias_quirk(struct usb_device *dev, unsigned int id) 735{ 736 const struct usb_device_id *p; 737 738 for (p = usb_audio_ids; p->match_flags; p++) { 739 /* FIXME: this checks only vendor:product pair in the list */ 740 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == 741 USB_DEVICE_ID_MATCH_DEVICE && 742 p->idVendor == USB_ID_VENDOR(id) && 743 p->idProduct == USB_ID_PRODUCT(id)) 744 return (const struct snd_usb_audio_quirk *)p->driver_info; 745 } 746 747 return NULL; 748} 749 750/* register card if we reach to the last interface or to the specified 751 * one given via option 752 */ 753static int try_to_register_card(struct snd_usb_audio *chip, int ifnum) 754{ 755 if (check_delayed_register_option(chip) == ifnum || 756 chip->last_iface == ifnum || 757 usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface))) 758 return snd_card_register(chip->card); 759 return 0; 760} 761 762/* 763 * probe the active usb device 764 * 765 * note that this can be called multiple times per a device, when it 766 * includes multiple audio control interfaces. 767 * 768 * thus we check the usb device pointer and creates the card instance 769 * only at the first time. the successive calls of this function will 770 * append the pcm interface to the corresponding card. 771 */ 772static int usb_audio_probe(struct usb_interface *intf, 773 const struct usb_device_id *usb_id) 774{ 775 struct usb_device *dev = interface_to_usbdev(intf); 776 const struct snd_usb_audio_quirk *quirk = 777 (const struct snd_usb_audio_quirk *)usb_id->driver_info; 778 struct snd_usb_audio *chip; 779 int i, err; 780 struct usb_host_interface *alts; 781 int ifnum; 782 u32 id; 783 784 alts = &intf->altsetting[0]; 785 ifnum = get_iface_desc(alts)->bInterfaceNumber; 786 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), 787 le16_to_cpu(dev->descriptor.idProduct)); 788 if (get_alias_id(dev, &id)) 789 quirk = get_alias_quirk(dev, id); 790 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) 791 return -ENXIO; 792 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE) 793 return -ENODEV; 794 795 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); 796 if (err < 0) 797 return err; 798 799 /* 800 * found a config. now register to ALSA 801 */ 802 803 /* check whether it's already registered */ 804 chip = NULL; 805 mutex_lock(®ister_mutex); 806 for (i = 0; i < SNDRV_CARDS; i++) { 807 if (usb_chip[i] && usb_chip[i]->dev == dev) { 808 if (atomic_read(&usb_chip[i]->shutdown)) { 809 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); 810 err = -EIO; 811 goto __error; 812 } 813 chip = usb_chip[i]; 814 atomic_inc(&chip->active); /* avoid autopm */ 815 break; 816 } 817 } 818 if (! chip) { 819 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id); 820 if (err < 0) 821 goto __error; 822 823 /* it's a fresh one. 824 * now look for an empty slot and create a new card instance 825 */ 826 for (i = 0; i < SNDRV_CARDS; i++) 827 if (!usb_chip[i] && 828 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && 829 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { 830 if (enable[i]) { 831 err = snd_usb_audio_create(intf, dev, i, quirk, 832 id, &chip); 833 if (err < 0) 834 goto __error; 835 break; 836 } else if (vid[i] != -1 || pid[i] != -1) { 837 dev_info(&dev->dev, 838 "device (%04x:%04x) is disabled\n", 839 USB_ID_VENDOR(id), 840 USB_ID_PRODUCT(id)); 841 err = -ENOENT; 842 goto __error; 843 } 844 } 845 if (!chip) { 846 dev_err(&dev->dev, "no available usb audio device\n"); 847 err = -ENODEV; 848 goto __error; 849 } 850 find_last_interface(chip); 851 } 852 853 if (chip->num_interfaces >= MAX_CARD_INTERFACES) { 854 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n"); 855 err = -EINVAL; 856 goto __error; 857 } 858 859 dev_set_drvdata(&dev->dev, chip); 860 861 if (ignore_ctl_error) 862 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR; 863 864 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) 865 usb_disable_autosuspend(interface_to_usbdev(intf)); 866 867 /* 868 * For devices with more than one control interface, we assume the 869 * first contains the audio controls. We might need a more specific 870 * check here in the future. 871 */ 872 if (!chip->ctrl_intf) 873 chip->ctrl_intf = alts; 874 875 err = 1; /* continue */ 876 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { 877 /* need some special handlings */ 878 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); 879 if (err < 0) 880 goto __error; 881 } 882 883 if (err > 0) { 884 /* create normal USB audio interfaces */ 885 err = snd_usb_create_streams(chip, ifnum); 886 if (err < 0) 887 goto __error; 888 err = snd_usb_create_mixer(chip, ifnum); 889 if (err < 0) 890 goto __error; 891 } 892 893 if (chip->need_delayed_register) { 894 dev_info(&dev->dev, 895 "Found post-registration device assignment: %08x:%02x\n", 896 chip->usb_id, ifnum); 897 chip->need_delayed_register = false; /* clear again */ 898 } 899 900 err = try_to_register_card(chip, ifnum); 901 if (err < 0) 902 goto __error_no_register; 903 904 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) { 905 /* don't want to fail when snd_media_device_create() fails */ 906 snd_media_device_create(chip, intf); 907 } 908 909 if (quirk) 910 chip->quirk_type = quirk->type; 911 912 usb_chip[chip->index] = chip; 913 chip->intf[chip->num_interfaces] = intf; 914 chip->num_interfaces++; 915 usb_set_intfdata(intf, chip); 916 atomic_dec(&chip->active); 917 mutex_unlock(®ister_mutex); 918 return 0; 919 920 __error: 921 /* in the case of error in secondary interface, still try to register */ 922 if (chip) 923 try_to_register_card(chip, ifnum); 924 925 __error_no_register: 926 if (chip) { 927 /* chip->active is inside the chip->card object, 928 * decrement before memory is possibly returned. 929 */ 930 atomic_dec(&chip->active); 931 if (!chip->num_interfaces) 932 snd_card_free(chip->card); 933 } 934 mutex_unlock(®ister_mutex); 935 return err; 936} 937 938/* 939 * we need to take care of counter, since disconnection can be called also 940 * many times as well as usb_audio_probe(). 941 */ 942static void usb_audio_disconnect(struct usb_interface *intf) 943{ 944 struct snd_usb_audio *chip = usb_get_intfdata(intf); 945 struct snd_card *card; 946 struct list_head *p; 947 948 if (chip == USB_AUDIO_IFACE_UNUSED) 949 return; 950 951 card = chip->card; 952 953 mutex_lock(®ister_mutex); 954 if (atomic_inc_return(&chip->shutdown) == 1) { 955 struct snd_usb_stream *as; 956 struct snd_usb_endpoint *ep; 957 struct usb_mixer_interface *mixer; 958 959 /* wait until all pending tasks done; 960 * they are protected by snd_usb_lock_shutdown() 961 */ 962 wait_event(chip->shutdown_wait, 963 !atomic_read(&chip->usage_count)); 964 snd_card_disconnect(card); 965 /* release the pcm resources */ 966 list_for_each_entry(as, &chip->pcm_list, list) { 967 snd_usb_stream_disconnect(as); 968 } 969 /* release the endpoint resources */ 970 list_for_each_entry(ep, &chip->ep_list, list) { 971 snd_usb_endpoint_release(ep); 972 } 973 /* release the midi resources */ 974 list_for_each(p, &chip->midi_list) { 975 snd_usbmidi_disconnect(p); 976 } 977 snd_usb_midi_v2_disconnect_all(chip); 978 /* 979 * Nice to check quirk && quirk->shares_media_device and 980 * then call the snd_media_device_delete(). Don't have 981 * access to the quirk here. snd_media_device_delete() 982 * accesses mixer_list 983 */ 984 snd_media_device_delete(chip); 985 986 /* release mixer resources */ 987 list_for_each_entry(mixer, &chip->mixer_list, list) { 988 snd_usb_mixer_disconnect(mixer); 989 } 990 } 991 992 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) 993 usb_enable_autosuspend(interface_to_usbdev(intf)); 994 995 chip->num_interfaces--; 996 if (chip->num_interfaces <= 0) { 997 usb_chip[chip->index] = NULL; 998 mutex_unlock(®ister_mutex); 999 snd_card_free_when_closed(card); 1000 } else { 1001 mutex_unlock(®ister_mutex); 1002 } 1003} 1004 1005/* lock the shutdown (disconnect) task and autoresume */ 1006int snd_usb_lock_shutdown(struct snd_usb_audio *chip) 1007{ 1008 int err; 1009 1010 atomic_inc(&chip->usage_count); 1011 if (atomic_read(&chip->shutdown)) { 1012 err = -EIO; 1013 goto error; 1014 } 1015 err = snd_usb_autoresume(chip); 1016 if (err < 0) 1017 goto error; 1018 return 0; 1019 1020 error: 1021 if (atomic_dec_and_test(&chip->usage_count)) 1022 wake_up(&chip->shutdown_wait); 1023 return err; 1024} 1025 1026/* autosuspend and unlock the shutdown */ 1027void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) 1028{ 1029 snd_usb_autosuspend(chip); 1030 if (atomic_dec_and_test(&chip->usage_count)) 1031 wake_up(&chip->shutdown_wait); 1032} 1033 1034int snd_usb_autoresume(struct snd_usb_audio *chip) 1035{ 1036 int i, err; 1037 1038 if (atomic_read(&chip->shutdown)) 1039 return -EIO; 1040 if (atomic_inc_return(&chip->active) != 1) 1041 return 0; 1042 1043 for (i = 0; i < chip->num_interfaces; i++) { 1044 err = usb_autopm_get_interface(chip->intf[i]); 1045 if (err < 0) { 1046 /* rollback */ 1047 while (--i >= 0) 1048 usb_autopm_put_interface(chip->intf[i]); 1049 atomic_dec(&chip->active); 1050 return err; 1051 } 1052 } 1053 return 0; 1054} 1055 1056void snd_usb_autosuspend(struct snd_usb_audio *chip) 1057{ 1058 int i; 1059 1060 if (atomic_read(&chip->shutdown)) 1061 return; 1062 if (!atomic_dec_and_test(&chip->active)) 1063 return; 1064 1065 for (i = 0; i < chip->num_interfaces; i++) 1066 usb_autopm_put_interface(chip->intf[i]); 1067} 1068 1069static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) 1070{ 1071 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1072 struct snd_usb_stream *as; 1073 struct snd_usb_endpoint *ep; 1074 struct usb_mixer_interface *mixer; 1075 struct list_head *p; 1076 1077 if (chip == USB_AUDIO_IFACE_UNUSED) 1078 return 0; 1079 1080 if (!chip->num_suspended_intf++) { 1081 list_for_each_entry(as, &chip->pcm_list, list) 1082 snd_usb_pcm_suspend(as); 1083 list_for_each_entry(ep, &chip->ep_list, list) 1084 snd_usb_endpoint_suspend(ep); 1085 list_for_each(p, &chip->midi_list) 1086 snd_usbmidi_suspend(p); 1087 list_for_each_entry(mixer, &chip->mixer_list, list) 1088 snd_usb_mixer_suspend(mixer); 1089 snd_usb_midi_v2_suspend_all(chip); 1090 } 1091 1092 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) { 1093 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); 1094 chip->system_suspend = chip->num_suspended_intf; 1095 } 1096 1097 return 0; 1098} 1099 1100static int usb_audio_resume(struct usb_interface *intf) 1101{ 1102 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1103 struct snd_usb_stream *as; 1104 struct usb_mixer_interface *mixer; 1105 struct list_head *p; 1106 int err = 0; 1107 1108 if (chip == USB_AUDIO_IFACE_UNUSED) 1109 return 0; 1110 1111 atomic_inc(&chip->active); /* avoid autopm */ 1112 if (chip->num_suspended_intf > 1) 1113 goto out; 1114 1115 list_for_each_entry(as, &chip->pcm_list, list) { 1116 err = snd_usb_pcm_resume(as); 1117 if (err < 0) 1118 goto err_out; 1119 } 1120 1121 /* 1122 * ALSA leaves material resumption to user space 1123 * we just notify and restart the mixers 1124 */ 1125 list_for_each_entry(mixer, &chip->mixer_list, list) { 1126 err = snd_usb_mixer_resume(mixer); 1127 if (err < 0) 1128 goto err_out; 1129 } 1130 1131 list_for_each(p, &chip->midi_list) { 1132 snd_usbmidi_resume(p); 1133 } 1134 1135 snd_usb_midi_v2_resume_all(chip); 1136 1137 out: 1138 if (chip->num_suspended_intf == chip->system_suspend) { 1139 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); 1140 chip->system_suspend = 0; 1141 } 1142 chip->num_suspended_intf--; 1143 1144err_out: 1145 atomic_dec(&chip->active); /* allow autopm after this point */ 1146 return err; 1147} 1148 1149static const struct usb_device_id usb_audio_ids [] = { 1150#include "quirks-table.h" 1151 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), 1152 .bInterfaceClass = USB_CLASS_AUDIO, 1153 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, 1154 { } /* Terminating entry */ 1155}; 1156MODULE_DEVICE_TABLE(usb, usb_audio_ids); 1157 1158/* 1159 * entry point for linux usb interface 1160 */ 1161 1162static struct usb_driver usb_audio_driver = { 1163 .name = "snd-usb-audio", 1164 .probe = usb_audio_probe, 1165 .disconnect = usb_audio_disconnect, 1166 .suspend = usb_audio_suspend, 1167 .resume = usb_audio_resume, 1168 .reset_resume = usb_audio_resume, 1169 .id_table = usb_audio_ids, 1170 .supports_autosuspend = 1, 1171}; 1172 1173module_usb_driver(usb_audio_driver); 1174