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 bool lowlatency = true; 72 static char *quirk_alias[SNDRV_CARDS]; 73 static char *delayed_register[SNDRV_CARDS]; 74 static bool implicit_fb[SNDRV_CARDS]; 75 static unsigned int quirk_flags[SNDRV_CARDS]; 76 77 bool snd_usb_use_vmalloc = true; 78 bool snd_usb_skip_validation; 79 80 module_param_array(index, int, NULL, 0444); 81 MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); 82 module_param_array(id, charp, NULL, 0444); 83 MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); 84 module_param_array(enable, bool, NULL, 0444); 85 MODULE_PARM_DESC(enable, "Enable USB audio adapter."); 86 module_param_array(vid, int, NULL, 0444); 87 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); 88 module_param_array(pid, int, NULL, 0444); 89 MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); 90 module_param_array(device_setup, int, NULL, 0444); 91 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); 92 module_param(ignore_ctl_error, bool, 0444); 93 MODULE_PARM_DESC(ignore_ctl_error, 94 "Ignore errors from USB controller for mixer interfaces."); 95 module_param(autoclock, bool, 0444); 96 MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); 97 module_param(lowlatency, bool, 0444); 98 MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes)."); 99 module_param_array(quirk_alias, charp, NULL, 0444); 100 MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef."); 101 module_param_array(delayed_register, charp, NULL, 0444); 102 MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4."); 103 module_param_array(implicit_fb, bool, NULL, 0444); 104 MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode."); 105 module_param_array(quirk_flags, uint, NULL, 0444); 106 MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags."); 107 module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444); 108 MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes)."); 109 module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444); 110 MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no)."); 111 112 /* 113 * we keep the snd_usb_audio_t instances by ourselves for merging 114 * the all interfaces on the same card as one sound device. 115 */ 116 117 static DEFINE_MUTEX(register_mutex); 118 static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; 119 static struct usb_driver usb_audio_driver; 120 121 /* 122 * disconnect streams 123 * called from usb_audio_disconnect() 124 */ 125 static void snd_usb_stream_disconnect(struct snd_usb_stream *as) 126 { 127 int idx; 128 struct snd_usb_substream *subs; 129 130 for (idx = 0; idx < 2; idx++) { 131 subs = &as->substream[idx]; 132 if (!subs->num_formats) 133 continue; 134 subs->data_endpoint = NULL; 135 subs->sync_endpoint = NULL; 136 } 137 } 138 139 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) 140 { 141 struct usb_device *dev = chip->dev; 142 struct usb_host_interface *alts; 143 struct usb_interface_descriptor *altsd; 144 struct usb_interface *iface = usb_ifnum_to_if(dev, interface); 145 146 if (!iface) { 147 dev_err(&dev->dev, "%u:%d : does not exist\n", 148 ctrlif, interface); 149 return -EINVAL; 150 } 151 152 alts = &iface->altsetting[0]; 153 altsd = get_iface_desc(alts); 154 155 /* 156 * Android with both accessory and audio interfaces enabled gets the 157 * interface numbers wrong. 158 */ 159 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || 160 chip->usb_id == USB_ID(0x18d1, 0x2d05)) && 161 interface == 0 && 162 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && 163 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { 164 interface = 2; 165 iface = usb_ifnum_to_if(dev, interface); 166 if (!iface) 167 return -EINVAL; 168 alts = &iface->altsetting[0]; 169 altsd = get_iface_desc(alts); 170 } 171 172 if (usb_interface_claimed(iface)) { 173 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", 174 ctrlif, interface); 175 return -EINVAL; 176 } 177 178 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || 179 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && 180 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { 181 int err = __snd_usbmidi_create(chip->card, iface, 182 &chip->midi_list, 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 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 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */ 429 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"), 430 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"), 431 432 /* aka. Serato Scratch Live DJ Box */ 433 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"), 434 435 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */ 436 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear", 437 "Lenovo-ThinkStation-P620-Rear"), 438 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */ 439 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main", 440 "Lenovo-ThinkStation-P620-Main"), 441 442 /* Asrock TRX40 Creator */ 443 PROFILE_NAME(0x26ce, 0x0a01, 444 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), 445 446 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"), 447 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"), 448 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"), 449 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"), 450 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"), 451 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"), 452 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"), 453 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"), 454 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"), 455 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"), 456 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"), 457 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"), 458 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"), 459 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"), 460 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"), 461 462 { } /* terminator */ 463 }; 464 465 static const struct usb_audio_device_name * 466 lookup_device_name(u32 id) 467 { 468 static const struct usb_audio_device_name *p; 469 470 for (p = usb_audio_names; p->id; p++) 471 if (p->id == id) 472 return p; 473 return NULL; 474 } 475 476 /* 477 * free the chip instance 478 * 479 * here we have to do not much, since pcm and controls are already freed 480 * 481 */ 482 483 static void snd_usb_audio_free(struct snd_card *card) 484 { 485 struct snd_usb_audio *chip = card->private_data; 486 487 snd_usb_endpoint_free_all(chip); 488 489 mutex_destroy(&chip->mutex); 490 if (!atomic_read(&chip->shutdown)) 491 dev_set_drvdata(&chip->dev->dev, NULL); 492 } 493 494 static void usb_audio_make_shortname(struct usb_device *dev, 495 struct snd_usb_audio *chip, 496 const struct snd_usb_audio_quirk *quirk) 497 { 498 struct snd_card *card = chip->card; 499 const struct usb_audio_device_name *preset; 500 const char *s = NULL; 501 502 preset = lookup_device_name(chip->usb_id); 503 if (preset && preset->product_name) 504 s = preset->product_name; 505 else if (quirk && quirk->product_name) 506 s = quirk->product_name; 507 if (s && *s) { 508 strscpy(card->shortname, s, sizeof(card->shortname)); 509 return; 510 } 511 512 /* retrieve the device string as shortname */ 513 if (!dev->descriptor.iProduct || 514 usb_string(dev, dev->descriptor.iProduct, 515 card->shortname, sizeof(card->shortname)) <= 0) { 516 /* no name available from anywhere, so use ID */ 517 sprintf(card->shortname, "USB Device %#04x:%#04x", 518 USB_ID_VENDOR(chip->usb_id), 519 USB_ID_PRODUCT(chip->usb_id)); 520 } 521 522 strim(card->shortname); 523 } 524 525 static void usb_audio_make_longname(struct usb_device *dev, 526 struct snd_usb_audio *chip, 527 const struct snd_usb_audio_quirk *quirk) 528 { 529 struct snd_card *card = chip->card; 530 const struct usb_audio_device_name *preset; 531 const char *s = NULL; 532 int len; 533 534 preset = lookup_device_name(chip->usb_id); 535 536 /* shortcut - if any pre-defined string is given, use it */ 537 if (preset && preset->profile_name) 538 s = preset->profile_name; 539 if (s && *s) { 540 strscpy(card->longname, s, sizeof(card->longname)); 541 return; 542 } 543 544 if (preset && preset->vendor_name) 545 s = preset->vendor_name; 546 else if (quirk && quirk->vendor_name) 547 s = quirk->vendor_name; 548 *card->longname = 0; 549 if (s && *s) { 550 strscpy(card->longname, s, sizeof(card->longname)); 551 } else { 552 /* retrieve the vendor and device strings as longname */ 553 if (dev->descriptor.iManufacturer) 554 usb_string(dev, dev->descriptor.iManufacturer, 555 card->longname, sizeof(card->longname)); 556 /* we don't really care if there isn't any vendor string */ 557 } 558 if (*card->longname) { 559 strim(card->longname); 560 if (*card->longname) 561 strlcat(card->longname, " ", sizeof(card->longname)); 562 } 563 564 strlcat(card->longname, card->shortname, sizeof(card->longname)); 565 566 len = strlcat(card->longname, " at ", sizeof(card->longname)); 567 568 if (len < sizeof(card->longname)) 569 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); 570 571 switch (snd_usb_get_speed(dev)) { 572 case USB_SPEED_LOW: 573 strlcat(card->longname, ", low speed", sizeof(card->longname)); 574 break; 575 case USB_SPEED_FULL: 576 strlcat(card->longname, ", full speed", sizeof(card->longname)); 577 break; 578 case USB_SPEED_HIGH: 579 strlcat(card->longname, ", high speed", sizeof(card->longname)); 580 break; 581 case USB_SPEED_SUPER: 582 strlcat(card->longname, ", super speed", sizeof(card->longname)); 583 break; 584 case USB_SPEED_SUPER_PLUS: 585 strlcat(card->longname, ", super speed plus", sizeof(card->longname)); 586 break; 587 default: 588 break; 589 } 590 } 591 592 /* 593 * create a chip instance and set its names. 594 */ 595 static int snd_usb_audio_create(struct usb_interface *intf, 596 struct usb_device *dev, int idx, 597 const struct snd_usb_audio_quirk *quirk, 598 unsigned int usb_id, 599 struct snd_usb_audio **rchip) 600 { 601 struct snd_card *card; 602 struct snd_usb_audio *chip; 603 int err; 604 char component[14]; 605 606 *rchip = NULL; 607 608 switch (snd_usb_get_speed(dev)) { 609 case USB_SPEED_LOW: 610 case USB_SPEED_FULL: 611 case USB_SPEED_HIGH: 612 case USB_SPEED_WIRELESS: 613 case USB_SPEED_SUPER: 614 case USB_SPEED_SUPER_PLUS: 615 break; 616 default: 617 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); 618 return -ENXIO; 619 } 620 621 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, 622 sizeof(*chip), &card); 623 if (err < 0) { 624 dev_err(&dev->dev, "cannot create card instance %d\n", idx); 625 return err; 626 } 627 628 chip = card->private_data; 629 mutex_init(&chip->mutex); 630 init_waitqueue_head(&chip->shutdown_wait); 631 chip->index = idx; 632 chip->dev = dev; 633 chip->card = card; 634 chip->setup = device_setup[idx]; 635 chip->generic_implicit_fb = implicit_fb[idx]; 636 chip->autoclock = autoclock; 637 chip->lowlatency = lowlatency; 638 atomic_set(&chip->active, 1); /* avoid autopm during probing */ 639 atomic_set(&chip->usage_count, 0); 640 atomic_set(&chip->shutdown, 0); 641 642 chip->usb_id = usb_id; 643 INIT_LIST_HEAD(&chip->pcm_list); 644 INIT_LIST_HEAD(&chip->ep_list); 645 INIT_LIST_HEAD(&chip->iface_ref_list); 646 INIT_LIST_HEAD(&chip->clock_ref_list); 647 INIT_LIST_HEAD(&chip->midi_list); 648 INIT_LIST_HEAD(&chip->mixer_list); 649 650 if (quirk_flags[idx]) 651 chip->quirk_flags = quirk_flags[idx]; 652 else 653 snd_usb_init_quirk_flags(chip); 654 655 card->private_free = snd_usb_audio_free; 656 657 strcpy(card->driver, "USB-Audio"); 658 sprintf(component, "USB%04x:%04x", 659 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); 660 snd_component_add(card, component); 661 662 usb_audio_make_shortname(dev, chip, quirk); 663 usb_audio_make_longname(dev, chip, quirk); 664 665 snd_usb_audio_create_proc(chip); 666 667 *rchip = chip; 668 return 0; 669 } 670 671 /* look for a matching quirk alias id */ 672 static bool get_alias_id(struct usb_device *dev, unsigned int *id) 673 { 674 int i; 675 unsigned int src, dst; 676 677 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { 678 if (!quirk_alias[i] || 679 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || 680 src != *id) 681 continue; 682 dev_info(&dev->dev, 683 "device (%04x:%04x): applying quirk alias %04x:%04x\n", 684 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), 685 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); 686 *id = dst; 687 return true; 688 } 689 690 return false; 691 } 692 693 static int check_delayed_register_option(struct snd_usb_audio *chip) 694 { 695 int i; 696 unsigned int id, inum; 697 698 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) { 699 if (delayed_register[i] && 700 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 && 701 id == chip->usb_id) 702 return inum; 703 } 704 705 return -1; 706 } 707 708 static const struct usb_device_id usb_audio_ids[]; /* defined below */ 709 710 /* look for the last interface that matches with our ids and remember it */ 711 static void find_last_interface(struct snd_usb_audio *chip) 712 { 713 struct usb_host_config *config = chip->dev->actconfig; 714 struct usb_interface *intf; 715 int i; 716 717 if (!config) 718 return; 719 for (i = 0; i < config->desc.bNumInterfaces; i++) { 720 intf = config->interface[i]; 721 if (usb_match_id(intf, usb_audio_ids)) 722 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber; 723 } 724 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface); 725 } 726 727 /* look for the corresponding quirk */ 728 static const struct snd_usb_audio_quirk * 729 get_alias_quirk(struct usb_device *dev, unsigned int id) 730 { 731 const struct usb_device_id *p; 732 733 for (p = usb_audio_ids; p->match_flags; p++) { 734 /* FIXME: this checks only vendor:product pair in the list */ 735 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == 736 USB_DEVICE_ID_MATCH_DEVICE && 737 p->idVendor == USB_ID_VENDOR(id) && 738 p->idProduct == USB_ID_PRODUCT(id)) 739 return (const struct snd_usb_audio_quirk *)p->driver_info; 740 } 741 742 return NULL; 743 } 744 745 /* 746 * probe the active usb device 747 * 748 * note that this can be called multiple times per a device, when it 749 * includes multiple audio control interfaces. 750 * 751 * thus we check the usb device pointer and creates the card instance 752 * only at the first time. the successive calls of this function will 753 * append the pcm interface to the corresponding card. 754 */ 755 static int usb_audio_probe(struct usb_interface *intf, 756 const struct usb_device_id *usb_id) 757 { 758 struct usb_device *dev = interface_to_usbdev(intf); 759 const struct snd_usb_audio_quirk *quirk = 760 (const struct snd_usb_audio_quirk *)usb_id->driver_info; 761 struct snd_usb_audio *chip; 762 int i, err; 763 struct usb_host_interface *alts; 764 int ifnum; 765 u32 id; 766 767 alts = &intf->altsetting[0]; 768 ifnum = get_iface_desc(alts)->bInterfaceNumber; 769 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), 770 le16_to_cpu(dev->descriptor.idProduct)); 771 if (get_alias_id(dev, &id)) 772 quirk = get_alias_quirk(dev, id); 773 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) 774 return -ENXIO; 775 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE) 776 return -ENODEV; 777 778 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); 779 if (err < 0) 780 return err; 781 782 /* 783 * found a config. now register to ALSA 784 */ 785 786 /* check whether it's already registered */ 787 chip = NULL; 788 mutex_lock(®ister_mutex); 789 for (i = 0; i < SNDRV_CARDS; i++) { 790 if (usb_chip[i] && usb_chip[i]->dev == dev) { 791 if (atomic_read(&usb_chip[i]->shutdown)) { 792 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); 793 err = -EIO; 794 goto __error; 795 } 796 chip = usb_chip[i]; 797 atomic_inc(&chip->active); /* avoid autopm */ 798 break; 799 } 800 } 801 if (! chip) { 802 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id); 803 if (err < 0) 804 goto __error; 805 806 /* it's a fresh one. 807 * now look for an empty slot and create a new card instance 808 */ 809 for (i = 0; i < SNDRV_CARDS; i++) 810 if (!usb_chip[i] && 811 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && 812 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { 813 if (enable[i]) { 814 err = snd_usb_audio_create(intf, dev, i, quirk, 815 id, &chip); 816 if (err < 0) 817 goto __error; 818 break; 819 } else if (vid[i] != -1 || pid[i] != -1) { 820 dev_info(&dev->dev, 821 "device (%04x:%04x) is disabled\n", 822 USB_ID_VENDOR(id), 823 USB_ID_PRODUCT(id)); 824 err = -ENOENT; 825 goto __error; 826 } 827 } 828 if (!chip) { 829 dev_err(&dev->dev, "no available usb audio device\n"); 830 err = -ENODEV; 831 goto __error; 832 } 833 find_last_interface(chip); 834 } 835 836 if (chip->num_interfaces >= MAX_CARD_INTERFACES) { 837 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n"); 838 err = -EINVAL; 839 goto __error; 840 } 841 842 dev_set_drvdata(&dev->dev, chip); 843 844 if (ignore_ctl_error) 845 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR; 846 847 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) 848 usb_disable_autosuspend(interface_to_usbdev(intf)); 849 850 /* 851 * For devices with more than one control interface, we assume the 852 * first contains the audio controls. We might need a more specific 853 * check here in the future. 854 */ 855 if (!chip->ctrl_intf) 856 chip->ctrl_intf = alts; 857 858 err = 1; /* continue */ 859 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { 860 /* need some special handlings */ 861 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); 862 if (err < 0) 863 goto __error; 864 } 865 866 if (err > 0) { 867 /* create normal USB audio interfaces */ 868 err = snd_usb_create_streams(chip, ifnum); 869 if (err < 0) 870 goto __error; 871 err = snd_usb_create_mixer(chip, ifnum); 872 if (err < 0) 873 goto __error; 874 } 875 876 if (chip->need_delayed_register) { 877 dev_info(&dev->dev, 878 "Found post-registration device assignment: %08x:%02x\n", 879 chip->usb_id, ifnum); 880 chip->need_delayed_register = false; /* clear again */ 881 } 882 883 /* register card if we reach to the last interface or to the specified 884 * one given via option 885 */ 886 if (check_delayed_register_option(chip) == ifnum || 887 usb_interface_claimed(usb_ifnum_to_if(dev, chip->last_iface))) { 888 err = snd_card_register(chip->card); 889 if (err < 0) 890 goto __error; 891 } 892 893 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) { 894 /* don't want to fail when snd_media_device_create() fails */ 895 snd_media_device_create(chip, intf); 896 } 897 898 if (quirk) 899 chip->quirk_type = quirk->type; 900 901 usb_chip[chip->index] = chip; 902 chip->intf[chip->num_interfaces] = intf; 903 chip->num_interfaces++; 904 usb_set_intfdata(intf, chip); 905 atomic_dec(&chip->active); 906 mutex_unlock(®ister_mutex); 907 return 0; 908 909 __error: 910 if (chip) { 911 /* chip->active is inside the chip->card object, 912 * decrement before memory is possibly returned. 913 */ 914 atomic_dec(&chip->active); 915 if (!chip->num_interfaces) 916 snd_card_free(chip->card); 917 } 918 mutex_unlock(®ister_mutex); 919 return err; 920 } 921 922 /* 923 * we need to take care of counter, since disconnection can be called also 924 * many times as well as usb_audio_probe(). 925 */ 926 static void usb_audio_disconnect(struct usb_interface *intf) 927 { 928 struct snd_usb_audio *chip = usb_get_intfdata(intf); 929 struct snd_card *card; 930 struct list_head *p; 931 932 if (chip == USB_AUDIO_IFACE_UNUSED) 933 return; 934 935 card = chip->card; 936 937 mutex_lock(®ister_mutex); 938 if (atomic_inc_return(&chip->shutdown) == 1) { 939 struct snd_usb_stream *as; 940 struct snd_usb_endpoint *ep; 941 struct usb_mixer_interface *mixer; 942 943 /* wait until all pending tasks done; 944 * they are protected by snd_usb_lock_shutdown() 945 */ 946 wait_event(chip->shutdown_wait, 947 !atomic_read(&chip->usage_count)); 948 snd_card_disconnect(card); 949 /* release the pcm resources */ 950 list_for_each_entry(as, &chip->pcm_list, list) { 951 snd_usb_stream_disconnect(as); 952 } 953 /* release the endpoint resources */ 954 list_for_each_entry(ep, &chip->ep_list, list) { 955 snd_usb_endpoint_release(ep); 956 } 957 /* release the midi resources */ 958 list_for_each(p, &chip->midi_list) { 959 snd_usbmidi_disconnect(p); 960 } 961 /* 962 * Nice to check quirk && quirk->shares_media_device and 963 * then call the snd_media_device_delete(). Don't have 964 * access to the quirk here. snd_media_device_delete() 965 * accesses mixer_list 966 */ 967 snd_media_device_delete(chip); 968 969 /* release mixer resources */ 970 list_for_each_entry(mixer, &chip->mixer_list, list) { 971 snd_usb_mixer_disconnect(mixer); 972 } 973 } 974 975 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) 976 usb_enable_autosuspend(interface_to_usbdev(intf)); 977 978 chip->num_interfaces--; 979 if (chip->num_interfaces <= 0) { 980 usb_chip[chip->index] = NULL; 981 mutex_unlock(®ister_mutex); 982 snd_card_free_when_closed(card); 983 } else { 984 mutex_unlock(®ister_mutex); 985 } 986 } 987 988 /* lock the shutdown (disconnect) task and autoresume */ 989 int snd_usb_lock_shutdown(struct snd_usb_audio *chip) 990 { 991 int err; 992 993 atomic_inc(&chip->usage_count); 994 if (atomic_read(&chip->shutdown)) { 995 err = -EIO; 996 goto error; 997 } 998 err = snd_usb_autoresume(chip); 999 if (err < 0) 1000 goto error; 1001 return 0; 1002 1003 error: 1004 if (atomic_dec_and_test(&chip->usage_count)) 1005 wake_up(&chip->shutdown_wait); 1006 return err; 1007 } 1008 1009 /* autosuspend and unlock the shutdown */ 1010 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) 1011 { 1012 snd_usb_autosuspend(chip); 1013 if (atomic_dec_and_test(&chip->usage_count)) 1014 wake_up(&chip->shutdown_wait); 1015 } 1016 1017 int snd_usb_autoresume(struct snd_usb_audio *chip) 1018 { 1019 int i, err; 1020 1021 if (atomic_read(&chip->shutdown)) 1022 return -EIO; 1023 if (atomic_inc_return(&chip->active) != 1) 1024 return 0; 1025 1026 for (i = 0; i < chip->num_interfaces; i++) { 1027 err = usb_autopm_get_interface(chip->intf[i]); 1028 if (err < 0) { 1029 /* rollback */ 1030 while (--i >= 0) 1031 usb_autopm_put_interface(chip->intf[i]); 1032 atomic_dec(&chip->active); 1033 return err; 1034 } 1035 } 1036 return 0; 1037 } 1038 1039 void snd_usb_autosuspend(struct snd_usb_audio *chip) 1040 { 1041 int i; 1042 1043 if (atomic_read(&chip->shutdown)) 1044 return; 1045 if (!atomic_dec_and_test(&chip->active)) 1046 return; 1047 1048 for (i = 0; i < chip->num_interfaces; i++) 1049 usb_autopm_put_interface(chip->intf[i]); 1050 } 1051 1052 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) 1053 { 1054 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1055 struct snd_usb_stream *as; 1056 struct snd_usb_endpoint *ep; 1057 struct usb_mixer_interface *mixer; 1058 struct list_head *p; 1059 1060 if (chip == USB_AUDIO_IFACE_UNUSED) 1061 return 0; 1062 1063 if (!chip->num_suspended_intf++) { 1064 list_for_each_entry(as, &chip->pcm_list, list) 1065 snd_usb_pcm_suspend(as); 1066 list_for_each_entry(ep, &chip->ep_list, list) 1067 snd_usb_endpoint_suspend(ep); 1068 list_for_each(p, &chip->midi_list) 1069 snd_usbmidi_suspend(p); 1070 list_for_each_entry(mixer, &chip->mixer_list, list) 1071 snd_usb_mixer_suspend(mixer); 1072 } 1073 1074 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) { 1075 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); 1076 chip->system_suspend = chip->num_suspended_intf; 1077 } 1078 1079 return 0; 1080 } 1081 1082 static int usb_audio_resume(struct usb_interface *intf) 1083 { 1084 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1085 struct snd_usb_stream *as; 1086 struct usb_mixer_interface *mixer; 1087 struct list_head *p; 1088 int err = 0; 1089 1090 if (chip == USB_AUDIO_IFACE_UNUSED) 1091 return 0; 1092 1093 atomic_inc(&chip->active); /* avoid autopm */ 1094 if (chip->num_suspended_intf > 1) 1095 goto out; 1096 1097 list_for_each_entry(as, &chip->pcm_list, list) { 1098 err = snd_usb_pcm_resume(as); 1099 if (err < 0) 1100 goto err_out; 1101 } 1102 1103 /* 1104 * ALSA leaves material resumption to user space 1105 * we just notify and restart the mixers 1106 */ 1107 list_for_each_entry(mixer, &chip->mixer_list, list) { 1108 err = snd_usb_mixer_resume(mixer); 1109 if (err < 0) 1110 goto err_out; 1111 } 1112 1113 list_for_each(p, &chip->midi_list) { 1114 snd_usbmidi_resume(p); 1115 } 1116 1117 out: 1118 if (chip->num_suspended_intf == chip->system_suspend) { 1119 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); 1120 chip->system_suspend = 0; 1121 } 1122 chip->num_suspended_intf--; 1123 1124 err_out: 1125 atomic_dec(&chip->active); /* allow autopm after this point */ 1126 return err; 1127 } 1128 1129 static const struct usb_device_id usb_audio_ids [] = { 1130 #include "quirks-table.h" 1131 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), 1132 .bInterfaceClass = USB_CLASS_AUDIO, 1133 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, 1134 { } /* Terminating entry */ 1135 }; 1136 MODULE_DEVICE_TABLE(usb, usb_audio_ids); 1137 1138 /* 1139 * entry point for linux usb interface 1140 */ 1141 1142 static struct usb_driver usb_audio_driver = { 1143 .name = "snd-usb-audio", 1144 .probe = usb_audio_probe, 1145 .disconnect = usb_audio_disconnect, 1146 .suspend = usb_audio_suspend, 1147 .resume = usb_audio_resume, 1148 .reset_resume = usb_audio_resume, 1149 .id_table = usb_audio_ids, 1150 .supports_autosuspend = 1, 1151 }; 1152 1153 module_usb_driver(usb_audio_driver); 1154