1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * (Tentative) USB Audio Driver for ALSA 4 * 5 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> 6 * 7 * Many codes borrowed from audio.c by 8 * Alan Cox (alan@lxorguk.ukuu.org.uk) 9 * Thomas Sailer (sailer@ife.ee.ethz.ch) 10 * 11 * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com> 12 * 13 * NOTES: 14 * 15 * - the linked URBs would be preferred but not used so far because of 16 * the instability of unlinking. 17 * - type II is not supported properly. there is no device which supports 18 * this type *correctly*. SB extigy looks as if it supports, but it's 19 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream). 20 */ 21 22 23 #include <linux/bitops.h> 24 #include <linux/init.h> 25 #include <linux/list.h> 26 #include <linux/slab.h> 27 #include <linux/string.h> 28 #include <linux/ctype.h> 29 #include <linux/usb.h> 30 #include <linux/moduleparam.h> 31 #include <linux/mutex.h> 32 #include <linux/usb/audio.h> 33 #include <linux/usb/audio-v2.h> 34 #include <linux/usb/audio-v3.h> 35 #include <linux/module.h> 36 37 #include <sound/control.h> 38 #include <sound/core.h> 39 #include <sound/info.h> 40 #include <sound/pcm.h> 41 #include <sound/pcm_params.h> 42 #include <sound/initval.h> 43 44 #include "usbaudio.h" 45 #include "card.h" 46 #include "midi.h" 47 #include "midi2.h" 48 #include "mixer.h" 49 #include "proc.h" 50 #include "quirks.h" 51 #include "endpoint.h" 52 #include "helper.h" 53 #include "pcm.h" 54 #include "format.h" 55 #include "power.h" 56 #include "stream.h" 57 #include "media.h" 58 59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); 60 MODULE_DESCRIPTION("USB Audio"); 61 MODULE_LICENSE("GPL"); 62 63 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 64 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 65 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ 66 /* Vendor/product IDs for this card */ 67 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; 68 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; 69 static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ 70 static bool ignore_ctl_error; 71 static bool autoclock = true; 72 static bool lowlatency = true; 73 static char *quirk_alias[SNDRV_CARDS]; 74 static char *delayed_register[SNDRV_CARDS]; 75 static bool implicit_fb[SNDRV_CARDS]; 76 static unsigned int quirk_flags[SNDRV_CARDS]; 77 78 bool snd_usb_use_vmalloc = true; 79 bool snd_usb_skip_validation; 80 81 module_param_array(index, int, NULL, 0444); 82 MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); 83 module_param_array(id, charp, NULL, 0444); 84 MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); 85 module_param_array(enable, bool, NULL, 0444); 86 MODULE_PARM_DESC(enable, "Enable USB audio adapter."); 87 module_param_array(vid, int, NULL, 0444); 88 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); 89 module_param_array(pid, int, NULL, 0444); 90 MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); 91 module_param_array(device_setup, int, NULL, 0444); 92 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); 93 module_param(ignore_ctl_error, bool, 0444); 94 MODULE_PARM_DESC(ignore_ctl_error, 95 "Ignore errors from USB controller for mixer interfaces."); 96 module_param(autoclock, bool, 0444); 97 MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); 98 module_param(lowlatency, bool, 0444); 99 MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes)."); 100 module_param_array(quirk_alias, charp, NULL, 0444); 101 MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef."); 102 module_param_array(delayed_register, charp, NULL, 0444); 103 MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4."); 104 module_param_array(implicit_fb, bool, NULL, 0444); 105 MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode."); 106 module_param_array(quirk_flags, uint, NULL, 0444); 107 MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags."); 108 module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444); 109 MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes)."); 110 module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444); 111 MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no)."); 112 113 /* 114 * we keep the snd_usb_audio_t instances by ourselves for merging 115 * the all interfaces on the same card as one sound device. 116 */ 117 118 static DEFINE_MUTEX(register_mutex); 119 static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; 120 static struct usb_driver usb_audio_driver; 121 122 /* 123 * disconnect streams 124 * called from usb_audio_disconnect() 125 */ 126 static void snd_usb_stream_disconnect(struct snd_usb_stream *as) 127 { 128 int idx; 129 struct snd_usb_substream *subs; 130 131 for (idx = 0; idx < 2; idx++) { 132 subs = &as->substream[idx]; 133 if (!subs->num_formats) 134 continue; 135 subs->data_endpoint = NULL; 136 subs->sync_endpoint = NULL; 137 } 138 } 139 140 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) 141 { 142 struct usb_device *dev = chip->dev; 143 struct usb_host_interface *alts; 144 struct usb_interface_descriptor *altsd; 145 struct usb_interface *iface = usb_ifnum_to_if(dev, interface); 146 147 if (!iface) { 148 dev_err(&dev->dev, "%u:%d : does not exist\n", 149 ctrlif, interface); 150 return -EINVAL; 151 } 152 153 alts = &iface->altsetting[0]; 154 altsd = get_iface_desc(alts); 155 156 /* 157 * Android with both accessory and audio interfaces enabled gets the 158 * interface numbers wrong. 159 */ 160 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || 161 chip->usb_id == USB_ID(0x18d1, 0x2d05)) && 162 interface == 0 && 163 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && 164 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { 165 interface = 2; 166 iface = usb_ifnum_to_if(dev, interface); 167 if (!iface) 168 return -EINVAL; 169 alts = &iface->altsetting[0]; 170 altsd = get_iface_desc(alts); 171 } 172 173 if (usb_interface_claimed(iface)) { 174 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", 175 ctrlif, interface); 176 return -EINVAL; 177 } 178 179 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || 180 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && 181 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { 182 int err = snd_usb_midi_v2_create(chip, iface, NULL, 183 chip->usb_id); 184 if (err < 0) { 185 dev_err(&dev->dev, 186 "%u:%d: cannot create sequencer device\n", 187 ctrlif, interface); 188 return -EINVAL; 189 } 190 return usb_driver_claim_interface(&usb_audio_driver, iface, 191 USB_AUDIO_IFACE_UNUSED); 192 } 193 194 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && 195 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || 196 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { 197 dev_dbg(&dev->dev, 198 "%u:%d: skipping non-supported interface %d\n", 199 ctrlif, interface, altsd->bInterfaceClass); 200 /* skip non-supported classes */ 201 return -EINVAL; 202 } 203 204 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { 205 dev_err(&dev->dev, "low speed audio streaming not supported\n"); 206 return -EINVAL; 207 } 208 209 if (! snd_usb_parse_audio_interface(chip, interface)) { 210 usb_set_interface(dev, interface, 0); /* reset the current interface */ 211 return usb_driver_claim_interface(&usb_audio_driver, iface, 212 USB_AUDIO_IFACE_UNUSED); 213 } 214 215 return 0; 216 } 217 218 /* 219 * parse audio control descriptor and create pcm/midi streams 220 */ 221 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) 222 { 223 struct usb_device *dev = chip->dev; 224 struct usb_host_interface *host_iface; 225 struct usb_interface_descriptor *altsd; 226 int i, protocol; 227 228 /* find audiocontrol interface */ 229 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; 230 altsd = get_iface_desc(host_iface); 231 protocol = altsd->bInterfaceProtocol; 232 233 switch (protocol) { 234 default: 235 dev_warn(&dev->dev, 236 "unknown interface protocol %#02x, assuming v1\n", 237 protocol); 238 fallthrough; 239 240 case UAC_VERSION_1: { 241 struct uac1_ac_header_descriptor *h1; 242 int rest_bytes; 243 244 h1 = snd_usb_find_csint_desc(host_iface->extra, 245 host_iface->extralen, 246 NULL, UAC_HEADER); 247 if (!h1 || h1->bLength < sizeof(*h1)) { 248 dev_err(&dev->dev, "cannot find UAC_HEADER\n"); 249 return -EINVAL; 250 } 251 252 rest_bytes = (void *)(host_iface->extra + 253 host_iface->extralen) - (void *)h1; 254 255 /* just to be sure -- this shouldn't hit at all */ 256 if (rest_bytes <= 0) { 257 dev_err(&dev->dev, "invalid control header\n"); 258 return -EINVAL; 259 } 260 261 if (rest_bytes < sizeof(*h1)) { 262 dev_err(&dev->dev, "too short v1 buffer descriptor\n"); 263 return -EINVAL; 264 } 265 266 if (!h1->bInCollection) { 267 dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); 268 return -EINVAL; 269 } 270 271 if (rest_bytes < h1->bLength) { 272 dev_err(&dev->dev, "invalid buffer length (v1)\n"); 273 return -EINVAL; 274 } 275 276 if (h1->bLength < sizeof(*h1) + h1->bInCollection) { 277 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); 278 return -EINVAL; 279 } 280 281 for (i = 0; i < h1->bInCollection; i++) 282 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); 283 284 break; 285 } 286 287 case UAC_VERSION_2: 288 case UAC_VERSION_3: { 289 struct usb_interface_assoc_descriptor *assoc = 290 usb_ifnum_to_if(dev, ctrlif)->intf_assoc; 291 292 if (!assoc) { 293 /* 294 * Firmware writers cannot count to three. So to find 295 * the IAD on the NuForce UDH-100, also check the next 296 * interface. 297 */ 298 struct usb_interface *iface = 299 usb_ifnum_to_if(dev, ctrlif + 1); 300 if (iface && 301 iface->intf_assoc && 302 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && 303 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) 304 assoc = iface->intf_assoc; 305 } 306 307 if (!assoc) { 308 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n"); 309 return -EINVAL; 310 } 311 312 if (protocol == UAC_VERSION_3) { 313 int badd = assoc->bFunctionSubClass; 314 315 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 && 316 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO || 317 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) { 318 dev_err(&dev->dev, 319 "Unsupported UAC3 BADD profile\n"); 320 return -EINVAL; 321 } 322 323 chip->badd_profile = badd; 324 } 325 326 for (i = 0; i < assoc->bInterfaceCount; i++) { 327 int intf = assoc->bFirstInterface + i; 328 329 if (intf != ctrlif) 330 snd_usb_create_stream(chip, ctrlif, intf); 331 } 332 333 break; 334 } 335 } 336 337 return 0; 338 } 339 340 /* 341 * Profile name preset table 342 */ 343 struct usb_audio_device_name { 344 u32 id; 345 const char *vendor_name; 346 const char *product_name; 347 const char *profile_name; /* override card->longname */ 348 }; 349 350 #define PROFILE_NAME(vid, pid, vendor, product, profile) \ 351 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \ 352 .product_name = (product), .profile_name = (profile) } 353 #define DEVICE_NAME(vid, pid, vendor, product) \ 354 PROFILE_NAME(vid, pid, vendor, product, NULL) 355 356 /* vendor/product and profile name presets, sorted in device id order */ 357 static const struct usb_audio_device_name usb_audio_names[] = { 358 /* HP Thunderbolt Dock Audio Headset */ 359 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset", 360 "HP-Thunderbolt-Dock-Audio-Headset"), 361 /* HP Thunderbolt Dock Audio Module */ 362 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module", 363 "HP-Thunderbolt-Dock-Audio-Module"), 364 365 /* Two entries for Gigabyte TRX40 Aorus Master: 366 * TRX40 Aorus Master has two USB-audio devices, one for the front 367 * headphone with ESS SABRE9218 DAC chip, while another for the rest 368 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB. 369 * Here we provide two distinct names for making UCM profiles easier. 370 */ 371 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone", 372 "Gigabyte-Aorus-Master-Front-Headphone"), 373 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio", 374 "Gigabyte-Aorus-Master-Main-Audio"), 375 376 /* Gigabyte TRX40 Aorus Pro WiFi */ 377 PROFILE_NAME(0x0414, 0xa002, 378 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 379 380 /* Creative/E-Mu devices */ 381 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"), 382 /* Creative/Toshiba Multimedia Center SB-0500 */ 383 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"), 384 385 /* Logitech Audio Devices */ 386 DEVICE_NAME(0x046d, 0x0867, "Logitech, Inc.", "Logi-MeetUp"), 387 DEVICE_NAME(0x046d, 0x0874, "Logitech, Inc.", "Logi-Tap-Audio"), 388 DEVICE_NAME(0x046d, 0x087c, "Logitech, Inc.", "Logi-Huddle"), 389 DEVICE_NAME(0x046d, 0x0898, "Logitech, Inc.", "Logi-RB-Audio"), 390 DEVICE_NAME(0x046d, 0x08d2, "Logitech, Inc.", "Logi-RBM-Audio"), 391 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"), 392 393 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"), 394 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"), 395 396 /* ASUS ROG Zenith II: this machine has also two devices, one for 397 * the front headphone and another for the rest 398 */ 399 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone", 400 "Zenith-II-Front-Headphone"), 401 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio", 402 "Zenith-II-Main-Audio"), 403 404 /* ASUS ROG Strix */ 405 PROFILE_NAME(0x0b05, 0x1917, 406 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 407 /* ASUS PRIME TRX40 PRO-S */ 408 PROFILE_NAME(0x0b05, 0x1918, 409 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 410 411 /* Dell WD15 Dock */ 412 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"), 413 /* Dell WD19 Dock */ 414 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"), 415 416 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"), 417 418 /* 419 * The original product_name is "USB Sound Device", however this name 420 * is also used by the CM106 based cards, so make it unique. 421 */ 422 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"), 423 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"), 424 425 /* MSI TRX40 Creator */ 426 PROFILE_NAME(0x0db0, 0x0d64, 427 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 428 /* MSI TRX40 */ 429 PROFILE_NAME(0x0db0, 0x543d, 430 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 431 432 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"), 433 434 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */ 435 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"), 436 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"), 437 438 /* aka. Serato Scratch Live DJ Box */ 439 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"), 440 441 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */ 442 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear", 443 "Lenovo-ThinkStation-P620-Rear"), 444 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */ 445 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main", 446 "Lenovo-ThinkStation-P620-Main"), 447 448 /* Asrock TRX40 Creator */ 449 PROFILE_NAME(0x26ce, 0x0a01, 450 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 451 452 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"), 453 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"), 454 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"), 455 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"), 456 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"), 457 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"), 458 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"), 459 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"), 460 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"), 461 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"), 462 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"), 463 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"), 464 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"), 465 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"), 466 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"), 467 468 { } /* terminator */ 469 }; 470 471 static const struct usb_audio_device_name * 472 lookup_device_name(u32 id) 473 { 474 static const struct usb_audio_device_name *p; 475 476 for (p = usb_audio_names; p->id; p++) 477 if (p->id == id) 478 return p; 479 return NULL; 480 } 481 482 /* 483 * free the chip instance 484 * 485 * here we have to do not much, since pcm and controls are already freed 486 * 487 */ 488 489 static void snd_usb_audio_free(struct snd_card *card) 490 { 491 struct snd_usb_audio *chip = card->private_data; 492 493 snd_usb_endpoint_free_all(chip); 494 snd_usb_midi_v2_free_all(chip); 495 496 mutex_destroy(&chip->mutex); 497 if (!atomic_read(&chip->shutdown)) 498 dev_set_drvdata(&chip->dev->dev, NULL); 499 } 500 501 static void usb_audio_make_shortname(struct usb_device *dev, 502 struct snd_usb_audio *chip, 503 const struct snd_usb_audio_quirk *quirk) 504 { 505 struct snd_card *card = chip->card; 506 const struct usb_audio_device_name *preset; 507 const char *s = NULL; 508 509 preset = lookup_device_name(chip->usb_id); 510 if (preset && preset->product_name) 511 s = preset->product_name; 512 else if (quirk && quirk->product_name) 513 s = quirk->product_name; 514 if (s && *s) { 515 strscpy(card->shortname, s, sizeof(card->shortname)); 516 return; 517 } 518 519 /* retrieve the device string as shortname */ 520 if (!dev->descriptor.iProduct || 521 usb_string(dev, dev->descriptor.iProduct, 522 card->shortname, sizeof(card->shortname)) <= 0) { 523 /* no name available from anywhere, so use ID */ 524 sprintf(card->shortname, "USB Device %#04x:%#04x", 525 USB_ID_VENDOR(chip->usb_id), 526 USB_ID_PRODUCT(chip->usb_id)); 527 } 528 529 strim(card->shortname); 530 } 531 532 static void usb_audio_make_longname(struct usb_device *dev, 533 struct snd_usb_audio *chip, 534 const struct snd_usb_audio_quirk *quirk) 535 { 536 struct snd_card *card = chip->card; 537 const struct usb_audio_device_name *preset; 538 const char *s = NULL; 539 int len; 540 541 preset = lookup_device_name(chip->usb_id); 542 543 /* shortcut - if any pre-defined string is given, use it */ 544 if (preset && preset->profile_name) 545 s = preset->profile_name; 546 if (s && *s) { 547 strscpy(card->longname, s, sizeof(card->longname)); 548 return; 549 } 550 551 if (preset && preset->vendor_name) 552 s = preset->vendor_name; 553 else if (quirk && quirk->vendor_name) 554 s = quirk->vendor_name; 555 *card->longname = 0; 556 if (s && *s) { 557 strscpy(card->longname, s, sizeof(card->longname)); 558 } else { 559 /* retrieve the vendor and device strings as longname */ 560 if (dev->descriptor.iManufacturer) 561 usb_string(dev, dev->descriptor.iManufacturer, 562 card->longname, sizeof(card->longname)); 563 /* we don't really care if there isn't any vendor string */ 564 } 565 if (*card->longname) { 566 strim(card->longname); 567 if (*card->longname) 568 strlcat(card->longname, " ", sizeof(card->longname)); 569 } 570 571 strlcat(card->longname, card->shortname, sizeof(card->longname)); 572 573 len = strlcat(card->longname, " at ", sizeof(card->longname)); 574 575 if (len < sizeof(card->longname)) 576 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); 577 578 switch (snd_usb_get_speed(dev)) { 579 case USB_SPEED_LOW: 580 strlcat(card->longname, ", low speed", sizeof(card->longname)); 581 break; 582 case USB_SPEED_FULL: 583 strlcat(card->longname, ", full speed", sizeof(card->longname)); 584 break; 585 case USB_SPEED_HIGH: 586 strlcat(card->longname, ", high speed", sizeof(card->longname)); 587 break; 588 case USB_SPEED_SUPER: 589 strlcat(card->longname, ", super speed", sizeof(card->longname)); 590 break; 591 case USB_SPEED_SUPER_PLUS: 592 strlcat(card->longname, ", super speed plus", sizeof(card->longname)); 593 break; 594 default: 595 break; 596 } 597 } 598 599 /* 600 * create a chip instance and set its names. 601 */ 602 static int snd_usb_audio_create(struct usb_interface *intf, 603 struct usb_device *dev, int idx, 604 const struct snd_usb_audio_quirk *quirk, 605 unsigned int usb_id, 606 struct snd_usb_audio **rchip) 607 { 608 struct snd_card *card; 609 struct snd_usb_audio *chip; 610 int err; 611 char component[14]; 612 613 *rchip = NULL; 614 615 switch (snd_usb_get_speed(dev)) { 616 case USB_SPEED_LOW: 617 case USB_SPEED_FULL: 618 case USB_SPEED_HIGH: 619 case USB_SPEED_SUPER: 620 case USB_SPEED_SUPER_PLUS: 621 break; 622 default: 623 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); 624 return -ENXIO; 625 } 626 627 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, 628 sizeof(*chip), &card); 629 if (err < 0) { 630 dev_err(&dev->dev, "cannot create card instance %d\n", idx); 631 return err; 632 } 633 634 chip = card->private_data; 635 mutex_init(&chip->mutex); 636 init_waitqueue_head(&chip->shutdown_wait); 637 chip->index = idx; 638 chip->dev = dev; 639 chip->card = card; 640 chip->setup = device_setup[idx]; 641 chip->generic_implicit_fb = implicit_fb[idx]; 642 chip->autoclock = autoclock; 643 chip->lowlatency = lowlatency; 644 atomic_set(&chip->active, 1); /* avoid autopm during probing */ 645 atomic_set(&chip->usage_count, 0); 646 atomic_set(&chip->shutdown, 0); 647 648 chip->usb_id = usb_id; 649 INIT_LIST_HEAD(&chip->pcm_list); 650 INIT_LIST_HEAD(&chip->ep_list); 651 INIT_LIST_HEAD(&chip->iface_ref_list); 652 INIT_LIST_HEAD(&chip->clock_ref_list); 653 INIT_LIST_HEAD(&chip->midi_list); 654 INIT_LIST_HEAD(&chip->midi_v2_list); 655 INIT_LIST_HEAD(&chip->mixer_list); 656 657 if (quirk_flags[idx]) 658 chip->quirk_flags = quirk_flags[idx]; 659 else 660 snd_usb_init_quirk_flags(chip); 661 662 card->private_free = snd_usb_audio_free; 663 664 strcpy(card->driver, "USB-Audio"); 665 sprintf(component, "USB%04x:%04x", 666 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); 667 snd_component_add(card, component); 668 669 usb_audio_make_shortname(dev, chip, quirk); 670 usb_audio_make_longname(dev, chip, quirk); 671 672 snd_usb_audio_create_proc(chip); 673 674 *rchip = chip; 675 return 0; 676 } 677 678 /* look for a matching quirk alias id */ 679 static bool get_alias_id(struct usb_device *dev, unsigned int *id) 680 { 681 int i; 682 unsigned int src, dst; 683 684 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { 685 if (!quirk_alias[i] || 686 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || 687 src != *id) 688 continue; 689 dev_info(&dev->dev, 690 "device (%04x:%04x): applying quirk alias %04x:%04x\n", 691 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), 692 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); 693 *id = dst; 694 return true; 695 } 696 697 return false; 698 } 699 700 static int check_delayed_register_option(struct snd_usb_audio *chip) 701 { 702 int i; 703 unsigned int id, inum; 704 705 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) { 706 if (delayed_register[i] && 707 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 && 708 id == chip->usb_id) 709 return inum; 710 } 711 712 return -1; 713 } 714 715 static const struct usb_device_id usb_audio_ids[]; /* defined below */ 716 717 /* look for the last interface that matches with our ids and remember it */ 718 static void find_last_interface(struct snd_usb_audio *chip) 719 { 720 struct usb_host_config *config = chip->dev->actconfig; 721 struct usb_interface *intf; 722 int i; 723 724 if (!config) 725 return; 726 for (i = 0; i < config->desc.bNumInterfaces; i++) { 727 intf = config->interface[i]; 728 if (usb_match_id(intf, usb_audio_ids)) 729 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber; 730 } 731 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface); 732 } 733 734 /* look for the corresponding quirk */ 735 static const struct snd_usb_audio_quirk * 736 get_alias_quirk(struct usb_device *dev, unsigned int id) 737 { 738 const struct usb_device_id *p; 739 740 for (p = usb_audio_ids; p->match_flags; p++) { 741 /* FIXME: this checks only vendor:product pair in the list */ 742 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == 743 USB_DEVICE_ID_MATCH_DEVICE && 744 p->idVendor == USB_ID_VENDOR(id) && 745 p->idProduct == USB_ID_PRODUCT(id)) 746 return (const struct snd_usb_audio_quirk *)p->driver_info; 747 } 748 749 return NULL; 750 } 751 752 /* register card if we reach to the last interface or to the specified 753 * one given via option 754 */ 755 static int try_to_register_card(struct snd_usb_audio *chip, int ifnum) 756 { 757 if (check_delayed_register_option(chip) == ifnum || 758 chip->last_iface == ifnum || 759 usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface))) 760 return snd_card_register(chip->card); 761 return 0; 762 } 763 764 /* 765 * probe the active usb device 766 * 767 * note that this can be called multiple times per a device, when it 768 * includes multiple audio control interfaces. 769 * 770 * thus we check the usb device pointer and creates the card instance 771 * only at the first time. the successive calls of this function will 772 * append the pcm interface to the corresponding card. 773 */ 774 static int usb_audio_probe(struct usb_interface *intf, 775 const struct usb_device_id *usb_id) 776 { 777 struct usb_device *dev = interface_to_usbdev(intf); 778 const struct snd_usb_audio_quirk *quirk = 779 (const struct snd_usb_audio_quirk *)usb_id->driver_info; 780 struct snd_usb_audio *chip; 781 int i, err; 782 struct usb_host_interface *alts; 783 int ifnum; 784 u32 id; 785 786 alts = &intf->altsetting[0]; 787 ifnum = get_iface_desc(alts)->bInterfaceNumber; 788 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), 789 le16_to_cpu(dev->descriptor.idProduct)); 790 if (get_alias_id(dev, &id)) 791 quirk = get_alias_quirk(dev, id); 792 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) 793 return -ENXIO; 794 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE) 795 return -ENODEV; 796 797 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); 798 if (err < 0) 799 return err; 800 801 /* 802 * found a config. now register to ALSA 803 */ 804 805 /* check whether it's already registered */ 806 chip = NULL; 807 mutex_lock(®ister_mutex); 808 for (i = 0; i < SNDRV_CARDS; i++) { 809 if (usb_chip[i] && usb_chip[i]->dev == dev) { 810 if (atomic_read(&usb_chip[i]->shutdown)) { 811 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); 812 err = -EIO; 813 goto __error; 814 } 815 chip = usb_chip[i]; 816 atomic_inc(&chip->active); /* avoid autopm */ 817 break; 818 } 819 } 820 if (! chip) { 821 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id); 822 if (err < 0) 823 goto __error; 824 825 /* it's a fresh one. 826 * now look for an empty slot and create a new card instance 827 */ 828 for (i = 0; i < SNDRV_CARDS; i++) 829 if (!usb_chip[i] && 830 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && 831 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { 832 if (enable[i]) { 833 err = snd_usb_audio_create(intf, dev, i, quirk, 834 id, &chip); 835 if (err < 0) 836 goto __error; 837 break; 838 } else if (vid[i] != -1 || pid[i] != -1) { 839 dev_info(&dev->dev, 840 "device (%04x:%04x) is disabled\n", 841 USB_ID_VENDOR(id), 842 USB_ID_PRODUCT(id)); 843 err = -ENOENT; 844 goto __error; 845 } 846 } 847 if (!chip) { 848 dev_err(&dev->dev, "no available usb audio device\n"); 849 err = -ENODEV; 850 goto __error; 851 } 852 find_last_interface(chip); 853 } 854 855 if (chip->num_interfaces >= MAX_CARD_INTERFACES) { 856 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n"); 857 err = -EINVAL; 858 goto __error; 859 } 860 861 dev_set_drvdata(&dev->dev, chip); 862 863 if (ignore_ctl_error) 864 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR; 865 866 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) 867 usb_disable_autosuspend(interface_to_usbdev(intf)); 868 869 /* 870 * For devices with more than one control interface, we assume the 871 * first contains the audio controls. We might need a more specific 872 * check here in the future. 873 */ 874 if (!chip->ctrl_intf) 875 chip->ctrl_intf = alts; 876 877 err = 1; /* continue */ 878 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { 879 /* need some special handlings */ 880 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); 881 if (err < 0) 882 goto __error; 883 } 884 885 if (err > 0) { 886 /* create normal USB audio interfaces */ 887 err = snd_usb_create_streams(chip, ifnum); 888 if (err < 0) 889 goto __error; 890 err = snd_usb_create_mixer(chip, ifnum); 891 if (err < 0) 892 goto __error; 893 } 894 895 if (chip->need_delayed_register) { 896 dev_info(&dev->dev, 897 "Found post-registration device assignment: %08x:%02x\n", 898 chip->usb_id, ifnum); 899 chip->need_delayed_register = false; /* clear again */ 900 } 901 902 err = try_to_register_card(chip, ifnum); 903 if (err < 0) 904 goto __error_no_register; 905 906 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) { 907 /* don't want to fail when snd_media_device_create() fails */ 908 snd_media_device_create(chip, intf); 909 } 910 911 if (quirk) 912 chip->quirk_type = quirk->type; 913 914 usb_chip[chip->index] = chip; 915 chip->intf[chip->num_interfaces] = intf; 916 chip->num_interfaces++; 917 usb_set_intfdata(intf, chip); 918 atomic_dec(&chip->active); 919 mutex_unlock(®ister_mutex); 920 return 0; 921 922 __error: 923 /* in the case of error in secondary interface, still try to register */ 924 if (chip) 925 try_to_register_card(chip, ifnum); 926 927 __error_no_register: 928 if (chip) { 929 /* chip->active is inside the chip->card object, 930 * decrement before memory is possibly returned. 931 */ 932 atomic_dec(&chip->active); 933 if (!chip->num_interfaces) 934 snd_card_free(chip->card); 935 } 936 mutex_unlock(®ister_mutex); 937 return err; 938 } 939 940 /* 941 * we need to take care of counter, since disconnection can be called also 942 * many times as well as usb_audio_probe(). 943 */ 944 static void usb_audio_disconnect(struct usb_interface *intf) 945 { 946 struct snd_usb_audio *chip = usb_get_intfdata(intf); 947 struct snd_card *card; 948 struct list_head *p; 949 950 if (chip == USB_AUDIO_IFACE_UNUSED) 951 return; 952 953 card = chip->card; 954 955 mutex_lock(®ister_mutex); 956 if (atomic_inc_return(&chip->shutdown) == 1) { 957 struct snd_usb_stream *as; 958 struct snd_usb_endpoint *ep; 959 struct usb_mixer_interface *mixer; 960 961 /* wait until all pending tasks done; 962 * they are protected by snd_usb_lock_shutdown() 963 */ 964 wait_event(chip->shutdown_wait, 965 !atomic_read(&chip->usage_count)); 966 snd_card_disconnect(card); 967 /* release the pcm resources */ 968 list_for_each_entry(as, &chip->pcm_list, list) { 969 snd_usb_stream_disconnect(as); 970 } 971 /* release the endpoint resources */ 972 list_for_each_entry(ep, &chip->ep_list, list) { 973 snd_usb_endpoint_release(ep); 974 } 975 /* release the midi resources */ 976 list_for_each(p, &chip->midi_list) { 977 snd_usbmidi_disconnect(p); 978 } 979 snd_usb_midi_v2_disconnect_all(chip); 980 /* 981 * Nice to check quirk && quirk->shares_media_device and 982 * then call the snd_media_device_delete(). Don't have 983 * access to the quirk here. snd_media_device_delete() 984 * accesses mixer_list 985 */ 986 snd_media_device_delete(chip); 987 988 /* release mixer resources */ 989 list_for_each_entry(mixer, &chip->mixer_list, list) { 990 snd_usb_mixer_disconnect(mixer); 991 } 992 } 993 994 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) 995 usb_enable_autosuspend(interface_to_usbdev(intf)); 996 997 chip->num_interfaces--; 998 if (chip->num_interfaces <= 0) { 999 usb_chip[chip->index] = NULL; 1000 mutex_unlock(®ister_mutex); 1001 snd_card_free_when_closed(card); 1002 } else { 1003 mutex_unlock(®ister_mutex); 1004 } 1005 } 1006 1007 /* lock the shutdown (disconnect) task and autoresume */ 1008 int snd_usb_lock_shutdown(struct snd_usb_audio *chip) 1009 { 1010 int err; 1011 1012 atomic_inc(&chip->usage_count); 1013 if (atomic_read(&chip->shutdown)) { 1014 err = -EIO; 1015 goto error; 1016 } 1017 err = snd_usb_autoresume(chip); 1018 if (err < 0) 1019 goto error; 1020 return 0; 1021 1022 error: 1023 if (atomic_dec_and_test(&chip->usage_count)) 1024 wake_up(&chip->shutdown_wait); 1025 return err; 1026 } 1027 1028 /* autosuspend and unlock the shutdown */ 1029 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) 1030 { 1031 snd_usb_autosuspend(chip); 1032 if (atomic_dec_and_test(&chip->usage_count)) 1033 wake_up(&chip->shutdown_wait); 1034 } 1035 1036 int snd_usb_autoresume(struct snd_usb_audio *chip) 1037 { 1038 int i, err; 1039 1040 if (atomic_read(&chip->shutdown)) 1041 return -EIO; 1042 if (atomic_inc_return(&chip->active) != 1) 1043 return 0; 1044 1045 for (i = 0; i < chip->num_interfaces; i++) { 1046 err = usb_autopm_get_interface(chip->intf[i]); 1047 if (err < 0) { 1048 /* rollback */ 1049 while (--i >= 0) 1050 usb_autopm_put_interface(chip->intf[i]); 1051 atomic_dec(&chip->active); 1052 return err; 1053 } 1054 } 1055 return 0; 1056 } 1057 1058 void snd_usb_autosuspend(struct snd_usb_audio *chip) 1059 { 1060 int i; 1061 1062 if (atomic_read(&chip->shutdown)) 1063 return; 1064 if (!atomic_dec_and_test(&chip->active)) 1065 return; 1066 1067 for (i = 0; i < chip->num_interfaces; i++) 1068 usb_autopm_put_interface(chip->intf[i]); 1069 } 1070 1071 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) 1072 { 1073 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1074 struct snd_usb_stream *as; 1075 struct snd_usb_endpoint *ep; 1076 struct usb_mixer_interface *mixer; 1077 struct list_head *p; 1078 1079 if (chip == USB_AUDIO_IFACE_UNUSED) 1080 return 0; 1081 1082 if (!chip->num_suspended_intf++) { 1083 list_for_each_entry(as, &chip->pcm_list, list) 1084 snd_usb_pcm_suspend(as); 1085 list_for_each_entry(ep, &chip->ep_list, list) 1086 snd_usb_endpoint_suspend(ep); 1087 list_for_each(p, &chip->midi_list) 1088 snd_usbmidi_suspend(p); 1089 list_for_each_entry(mixer, &chip->mixer_list, list) 1090 snd_usb_mixer_suspend(mixer); 1091 snd_usb_midi_v2_suspend_all(chip); 1092 } 1093 1094 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) { 1095 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); 1096 chip->system_suspend = chip->num_suspended_intf; 1097 } 1098 1099 return 0; 1100 } 1101 1102 static int usb_audio_resume(struct usb_interface *intf) 1103 { 1104 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1105 struct snd_usb_stream *as; 1106 struct usb_mixer_interface *mixer; 1107 struct list_head *p; 1108 int err = 0; 1109 1110 if (chip == USB_AUDIO_IFACE_UNUSED) 1111 return 0; 1112 1113 atomic_inc(&chip->active); /* avoid autopm */ 1114 if (chip->num_suspended_intf > 1) 1115 goto out; 1116 1117 list_for_each_entry(as, &chip->pcm_list, list) { 1118 err = snd_usb_pcm_resume(as); 1119 if (err < 0) 1120 goto err_out; 1121 } 1122 1123 /* 1124 * ALSA leaves material resumption to user space 1125 * we just notify and restart the mixers 1126 */ 1127 list_for_each_entry(mixer, &chip->mixer_list, list) { 1128 err = snd_usb_mixer_resume(mixer); 1129 if (err < 0) 1130 goto err_out; 1131 } 1132 1133 list_for_each(p, &chip->midi_list) { 1134 snd_usbmidi_resume(p); 1135 } 1136 1137 snd_usb_midi_v2_resume_all(chip); 1138 1139 out: 1140 if (chip->num_suspended_intf == chip->system_suspend) { 1141 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); 1142 chip->system_suspend = 0; 1143 } 1144 chip->num_suspended_intf--; 1145 1146 err_out: 1147 atomic_dec(&chip->active); /* allow autopm after this point */ 1148 return err; 1149 } 1150 1151 static const struct usb_device_id usb_audio_ids [] = { 1152 #include "quirks-table.h" 1153 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), 1154 .bInterfaceClass = USB_CLASS_AUDIO, 1155 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, 1156 { } /* Terminating entry */ 1157 }; 1158 MODULE_DEVICE_TABLE(usb, usb_audio_ids); 1159 1160 /* 1161 * entry point for linux usb interface 1162 */ 1163 1164 static struct usb_driver usb_audio_driver = { 1165 .name = "snd-usb-audio", 1166 .probe = usb_audio_probe, 1167 .disconnect = usb_audio_disconnect, 1168 .suspend = usb_audio_suspend, 1169 .resume = usb_audio_resume, 1170 .reset_resume = usb_audio_resume, 1171 .id_table = usb_audio_ids, 1172 .supports_autosuspend = 1, 1173 }; 1174 1175 module_usb_driver(usb_audio_driver); 1176