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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
58MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
59MODULE_DESCRIPTION("USB Audio");
60MODULE_LICENSE("GPL");
61
62static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
63static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
64static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
65/* Vendor/product IDs for this card */
66static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
67static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
68static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
69static bool ignore_ctl_error;
70static bool autoclock = true;
71static bool lowlatency = true;
72static char *quirk_alias[SNDRV_CARDS];
73static char *delayed_register[SNDRV_CARDS];
74static bool implicit_fb[SNDRV_CARDS];
75
76bool snd_usb_use_vmalloc = true;
77bool snd_usb_skip_validation;
78
79module_param_array(index, int, NULL, 0444);
80MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
81module_param_array(id, charp, NULL, 0444);
82MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
83module_param_array(enable, bool, NULL, 0444);
84MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
85module_param_array(vid, int, NULL, 0444);
86MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
87module_param_array(pid, int, NULL, 0444);
88MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
89module_param_array(device_setup, int, NULL, 0444);
90MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
91module_param(ignore_ctl_error, bool, 0444);
92MODULE_PARM_DESC(ignore_ctl_error,
93 "Ignore errors from USB controller for mixer interfaces.");
94module_param(autoclock, bool, 0444);
95MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
96module_param(lowlatency, bool, 0444);
97MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes).");
98module_param_array(quirk_alias, charp, NULL, 0444);
99MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
100module_param_array(delayed_register, charp, NULL, 0444);
101MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
102module_param_array(implicit_fb, bool, NULL, 0444);
103MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode.");
104module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
105MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
106module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
107MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
108
109/*
110 * we keep the snd_usb_audio_t instances by ourselves for merging
111 * the all interfaces on the same card as one sound device.
112 */
113
114static DEFINE_MUTEX(register_mutex);
115static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
116static struct usb_driver usb_audio_driver;
117
118/*
119 * disconnect streams
120 * called from usb_audio_disconnect()
121 */
122static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
123{
124 int idx;
125 struct snd_usb_substream *subs;
126
127 for (idx = 0; idx < 2; idx++) {
128 subs = &as->substream[idx];
129 if (!subs->num_formats)
130 continue;
131 subs->data_endpoint = NULL;
132 subs->sync_endpoint = NULL;
133 }
134}
135
136static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
137{
138 struct usb_device *dev = chip->dev;
139 struct usb_host_interface *alts;
140 struct usb_interface_descriptor *altsd;
141 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
142
143 if (!iface) {
144 dev_err(&dev->dev, "%u:%d : does not exist\n",
145 ctrlif, interface);
146 return -EINVAL;
147 }
148
149 alts = &iface->altsetting[0];
150 altsd = get_iface_desc(alts);
151
152 /*
153 * Android with both accessory and audio interfaces enabled gets the
154 * interface numbers wrong.
155 */
156 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
157 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
158 interface == 0 &&
159 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
160 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
161 interface = 2;
162 iface = usb_ifnum_to_if(dev, interface);
163 if (!iface)
164 return -EINVAL;
165 alts = &iface->altsetting[0];
166 altsd = get_iface_desc(alts);
167 }
168
169 if (usb_interface_claimed(iface)) {
170 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
171 ctrlif, interface);
172 return -EINVAL;
173 }
174
175 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
176 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
177 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
178 int err = __snd_usbmidi_create(chip->card, iface,
179 &chip->midi_list, NULL,
180 chip->usb_id);
181 if (err < 0) {
182 dev_err(&dev->dev,
183 "%u:%d: cannot create sequencer device\n",
184 ctrlif, interface);
185 return -EINVAL;
186 }
187 return usb_driver_claim_interface(&usb_audio_driver, iface,
188 USB_AUDIO_IFACE_UNUSED);
189 }
190
191 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
192 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
193 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
194 dev_dbg(&dev->dev,
195 "%u:%d: skipping non-supported interface %d\n",
196 ctrlif, interface, altsd->bInterfaceClass);
197 /* skip non-supported classes */
198 return -EINVAL;
199 }
200
201 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
202 dev_err(&dev->dev, "low speed audio streaming not supported\n");
203 return -EINVAL;
204 }
205
206 if (! snd_usb_parse_audio_interface(chip, interface)) {
207 usb_set_interface(dev, interface, 0); /* reset the current interface */
208 return usb_driver_claim_interface(&usb_audio_driver, iface,
209 USB_AUDIO_IFACE_UNUSED);
210 }
211
212 return 0;
213}
214
215/*
216 * parse audio control descriptor and create pcm/midi streams
217 */
218static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
219{
220 struct usb_device *dev = chip->dev;
221 struct usb_host_interface *host_iface;
222 struct usb_interface_descriptor *altsd;
223 int i, protocol;
224
225 /* find audiocontrol interface */
226 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
227 altsd = get_iface_desc(host_iface);
228 protocol = altsd->bInterfaceProtocol;
229
230 switch (protocol) {
231 default:
232 dev_warn(&dev->dev,
233 "unknown interface protocol %#02x, assuming v1\n",
234 protocol);
235 fallthrough;
236
237 case UAC_VERSION_1: {
238 struct uac1_ac_header_descriptor *h1;
239 int rest_bytes;
240
241 h1 = snd_usb_find_csint_desc(host_iface->extra,
242 host_iface->extralen,
243 NULL, UAC_HEADER);
244 if (!h1 || h1->bLength < sizeof(*h1)) {
245 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
246 return -EINVAL;
247 }
248
249 rest_bytes = (void *)(host_iface->extra +
250 host_iface->extralen) - (void *)h1;
251
252 /* just to be sure -- this shouldn't hit at all */
253 if (rest_bytes <= 0) {
254 dev_err(&dev->dev, "invalid control header\n");
255 return -EINVAL;
256 }
257
258 if (rest_bytes < sizeof(*h1)) {
259 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
260 return -EINVAL;
261 }
262
263 if (!h1->bInCollection) {
264 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
265 return -EINVAL;
266 }
267
268 if (rest_bytes < h1->bLength) {
269 dev_err(&dev->dev, "invalid buffer length (v1)\n");
270 return -EINVAL;
271 }
272
273 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
274 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
275 return -EINVAL;
276 }
277
278 for (i = 0; i < h1->bInCollection; i++)
279 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
280
281 break;
282 }
283
284 case UAC_VERSION_2:
285 case UAC_VERSION_3: {
286 struct usb_interface_assoc_descriptor *assoc =
287 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
288
289 if (!assoc) {
290 /*
291 * Firmware writers cannot count to three. So to find
292 * the IAD on the NuForce UDH-100, also check the next
293 * interface.
294 */
295 struct usb_interface *iface =
296 usb_ifnum_to_if(dev, ctrlif + 1);
297 if (iface &&
298 iface->intf_assoc &&
299 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
300 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
301 assoc = iface->intf_assoc;
302 }
303
304 if (!assoc) {
305 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
306 return -EINVAL;
307 }
308
309 if (protocol == UAC_VERSION_3) {
310 int badd = assoc->bFunctionSubClass;
311
312 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
313 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
314 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
315 dev_err(&dev->dev,
316 "Unsupported UAC3 BADD profile\n");
317 return -EINVAL;
318 }
319
320 chip->badd_profile = badd;
321 }
322
323 for (i = 0; i < assoc->bInterfaceCount; i++) {
324 int intf = assoc->bFirstInterface + i;
325
326 if (intf != ctrlif)
327 snd_usb_create_stream(chip, ctrlif, intf);
328 }
329
330 break;
331 }
332 }
333
334 return 0;
335}
336
337/*
338 * Profile name preset table
339 */
340struct usb_audio_device_name {
341 u32 id;
342 const char *vendor_name;
343 const char *product_name;
344 const char *profile_name; /* override card->longname */
345};
346
347#define PROFILE_NAME(vid, pid, vendor, product, profile) \
348 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
349 .product_name = (product), .profile_name = (profile) }
350#define DEVICE_NAME(vid, pid, vendor, product) \
351 PROFILE_NAME(vid, pid, vendor, product, NULL)
352
353/* vendor/product and profile name presets, sorted in device id order */
354static const struct usb_audio_device_name usb_audio_names[] = {
355 /* HP Thunderbolt Dock Audio Headset */
356 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
357 "HP-Thunderbolt-Dock-Audio-Headset"),
358 /* HP Thunderbolt Dock Audio Module */
359 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
360 "HP-Thunderbolt-Dock-Audio-Module"),
361
362 /* Two entries for Gigabyte TRX40 Aorus Master:
363 * TRX40 Aorus Master has two USB-audio devices, one for the front
364 * headphone with ESS SABRE9218 DAC chip, while another for the rest
365 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
366 * Here we provide two distinct names for making UCM profiles easier.
367 */
368 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
369 "Gigabyte-Aorus-Master-Front-Headphone"),
370 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
371 "Gigabyte-Aorus-Master-Main-Audio"),
372
373 /* Gigabyte TRX40 Aorus Pro WiFi */
374 PROFILE_NAME(0x0414, 0xa002,
375 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
376
377 /* Creative/E-Mu devices */
378 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
379 /* Creative/Toshiba Multimedia Center SB-0500 */
380 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
381
382 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
383
384 /* ASUS ROG Strix */
385 PROFILE_NAME(0x0b05, 0x1917,
386 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
387 /* ASUS PRIME TRX40 PRO-S */
388 PROFILE_NAME(0x0b05, 0x1918,
389 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
390
391 /* Dell WD15 Dock */
392 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
393 /* Dell WD19 Dock */
394 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
395
396 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
397
398 /*
399 * The original product_name is "USB Sound Device", however this name
400 * is also used by the CM106 based cards, so make it unique.
401 */
402 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
403 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
404
405 /* MSI TRX40 Creator */
406 PROFILE_NAME(0x0db0, 0x0d64,
407 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
408 /* MSI TRX40 */
409 PROFILE_NAME(0x0db0, 0x543d,
410 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
411
412 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
413 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
414 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
415
416 /* aka. Serato Scratch Live DJ Box */
417 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
418
419 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
420 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
421 "Lenovo-ThinkStation-P620-Rear"),
422 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
423 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
424 "Lenovo-ThinkStation-P620-Main"),
425
426 /* Asrock TRX40 Creator */
427 PROFILE_NAME(0x26ce, 0x0a01,
428 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
429
430 { } /* terminator */
431};
432
433static const struct usb_audio_device_name *
434lookup_device_name(u32 id)
435{
436 static const struct usb_audio_device_name *p;
437
438 for (p = usb_audio_names; p->id; p++)
439 if (p->id == id)
440 return p;
441 return NULL;
442}
443
444/*
445 * free the chip instance
446 *
447 * here we have to do not much, since pcm and controls are already freed
448 *
449 */
450
451static void snd_usb_audio_free(struct snd_card *card)
452{
453 struct snd_usb_audio *chip = card->private_data;
454
455 snd_usb_endpoint_free_all(chip);
456
457 mutex_destroy(&chip->mutex);
458 if (!atomic_read(&chip->shutdown))
459 dev_set_drvdata(&chip->dev->dev, NULL);
460}
461
462static void usb_audio_make_shortname(struct usb_device *dev,
463 struct snd_usb_audio *chip,
464 const struct snd_usb_audio_quirk *quirk)
465{
466 struct snd_card *card = chip->card;
467 const struct usb_audio_device_name *preset;
468 const char *s = NULL;
469
470 preset = lookup_device_name(chip->usb_id);
471 if (preset && preset->product_name)
472 s = preset->product_name;
473 else if (quirk && quirk->product_name)
474 s = quirk->product_name;
475 if (s && *s) {
476 strscpy(card->shortname, s, sizeof(card->shortname));
477 return;
478 }
479
480 /* retrieve the device string as shortname */
481 if (!dev->descriptor.iProduct ||
482 usb_string(dev, dev->descriptor.iProduct,
483 card->shortname, sizeof(card->shortname)) <= 0) {
484 /* no name available from anywhere, so use ID */
485 sprintf(card->shortname, "USB Device %#04x:%#04x",
486 USB_ID_VENDOR(chip->usb_id),
487 USB_ID_PRODUCT(chip->usb_id));
488 }
489
490 strim(card->shortname);
491}
492
493static void usb_audio_make_longname(struct usb_device *dev,
494 struct snd_usb_audio *chip,
495 const struct snd_usb_audio_quirk *quirk)
496{
497 struct snd_card *card = chip->card;
498 const struct usb_audio_device_name *preset;
499 const char *s = NULL;
500 int len;
501
502 preset = lookup_device_name(chip->usb_id);
503
504 /* shortcut - if any pre-defined string is given, use it */
505 if (preset && preset->profile_name)
506 s = preset->profile_name;
507 if (s && *s) {
508 strscpy(card->longname, s, sizeof(card->longname));
509 return;
510 }
511
512 if (preset && preset->vendor_name)
513 s = preset->vendor_name;
514 else if (quirk && quirk->vendor_name)
515 s = quirk->vendor_name;
516 *card->longname = 0;
517 if (s && *s) {
518 strscpy(card->longname, s, sizeof(card->longname));
519 } else {
520 /* retrieve the vendor and device strings as longname */
521 if (dev->descriptor.iManufacturer)
522 usb_string(dev, dev->descriptor.iManufacturer,
523 card->longname, sizeof(card->longname));
524 /* we don't really care if there isn't any vendor string */
525 }
526 if (*card->longname) {
527 strim(card->longname);
528 if (*card->longname)
529 strlcat(card->longname, " ", sizeof(card->longname));
530 }
531
532 strlcat(card->longname, card->shortname, sizeof(card->longname));
533
534 len = strlcat(card->longname, " at ", sizeof(card->longname));
535
536 if (len < sizeof(card->longname))
537 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
538
539 switch (snd_usb_get_speed(dev)) {
540 case USB_SPEED_LOW:
541 strlcat(card->longname, ", low speed", sizeof(card->longname));
542 break;
543 case USB_SPEED_FULL:
544 strlcat(card->longname, ", full speed", sizeof(card->longname));
545 break;
546 case USB_SPEED_HIGH:
547 strlcat(card->longname, ", high speed", sizeof(card->longname));
548 break;
549 case USB_SPEED_SUPER:
550 strlcat(card->longname, ", super speed", sizeof(card->longname));
551 break;
552 case USB_SPEED_SUPER_PLUS:
553 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
554 break;
555 default:
556 break;
557 }
558}
559
560/*
561 * create a chip instance and set its names.
562 */
563static int snd_usb_audio_create(struct usb_interface *intf,
564 struct usb_device *dev, int idx,
565 const struct snd_usb_audio_quirk *quirk,
566 unsigned int usb_id,
567 struct snd_usb_audio **rchip)
568{
569 struct snd_card *card;
570 struct snd_usb_audio *chip;
571 int err;
572 char component[14];
573
574 *rchip = NULL;
575
576 switch (snd_usb_get_speed(dev)) {
577 case USB_SPEED_LOW:
578 case USB_SPEED_FULL:
579 case USB_SPEED_HIGH:
580 case USB_SPEED_WIRELESS:
581 case USB_SPEED_SUPER:
582 case USB_SPEED_SUPER_PLUS:
583 break;
584 default:
585 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
586 return -ENXIO;
587 }
588
589 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
590 sizeof(*chip), &card);
591 if (err < 0) {
592 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
593 return err;
594 }
595
596 chip = card->private_data;
597 mutex_init(&chip->mutex);
598 init_waitqueue_head(&chip->shutdown_wait);
599 chip->index = idx;
600 chip->dev = dev;
601 chip->card = card;
602 chip->setup = device_setup[idx];
603 chip->generic_implicit_fb = implicit_fb[idx];
604 chip->autoclock = autoclock;
605 chip->lowlatency = lowlatency;
606 atomic_set(&chip->active, 1); /* avoid autopm during probing */
607 atomic_set(&chip->usage_count, 0);
608 atomic_set(&chip->shutdown, 0);
609
610 chip->usb_id = usb_id;
611 INIT_LIST_HEAD(&chip->pcm_list);
612 INIT_LIST_HEAD(&chip->ep_list);
613 INIT_LIST_HEAD(&chip->iface_ref_list);
614 INIT_LIST_HEAD(&chip->midi_list);
615 INIT_LIST_HEAD(&chip->mixer_list);
616
617 card->private_free = snd_usb_audio_free;
618
619 strcpy(card->driver, "USB-Audio");
620 sprintf(component, "USB%04x:%04x",
621 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
622 snd_component_add(card, component);
623
624 usb_audio_make_shortname(dev, chip, quirk);
625 usb_audio_make_longname(dev, chip, quirk);
626
627 snd_usb_audio_create_proc(chip);
628
629 *rchip = chip;
630 return 0;
631}
632
633/* look for a matching quirk alias id */
634static bool get_alias_id(struct usb_device *dev, unsigned int *id)
635{
636 int i;
637 unsigned int src, dst;
638
639 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
640 if (!quirk_alias[i] ||
641 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
642 src != *id)
643 continue;
644 dev_info(&dev->dev,
645 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
646 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
647 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
648 *id = dst;
649 return true;
650 }
651
652 return false;
653}
654
655static bool check_delayed_register_option(struct snd_usb_audio *chip, int iface)
656{
657 int i;
658 unsigned int id, inum;
659
660 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
661 if (delayed_register[i] &&
662 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
663 id == chip->usb_id)
664 return inum != iface;
665 }
666
667 return false;
668}
669
670static const struct usb_device_id usb_audio_ids[]; /* defined below */
671
672/* look for the corresponding quirk */
673static const struct snd_usb_audio_quirk *
674get_alias_quirk(struct usb_device *dev, unsigned int id)
675{
676 const struct usb_device_id *p;
677
678 for (p = usb_audio_ids; p->match_flags; p++) {
679 /* FIXME: this checks only vendor:product pair in the list */
680 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
681 USB_DEVICE_ID_MATCH_DEVICE &&
682 p->idVendor == USB_ID_VENDOR(id) &&
683 p->idProduct == USB_ID_PRODUCT(id))
684 return (const struct snd_usb_audio_quirk *)p->driver_info;
685 }
686
687 return NULL;
688}
689
690/*
691 * probe the active usb device
692 *
693 * note that this can be called multiple times per a device, when it
694 * includes multiple audio control interfaces.
695 *
696 * thus we check the usb device pointer and creates the card instance
697 * only at the first time. the successive calls of this function will
698 * append the pcm interface to the corresponding card.
699 */
700static int usb_audio_probe(struct usb_interface *intf,
701 const struct usb_device_id *usb_id)
702{
703 struct usb_device *dev = interface_to_usbdev(intf);
704 const struct snd_usb_audio_quirk *quirk =
705 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
706 struct snd_usb_audio *chip;
707 int i, err;
708 struct usb_host_interface *alts;
709 int ifnum;
710 u32 id;
711
712 alts = &intf->altsetting[0];
713 ifnum = get_iface_desc(alts)->bInterfaceNumber;
714 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
715 le16_to_cpu(dev->descriptor.idProduct));
716 if (get_alias_id(dev, &id))
717 quirk = get_alias_quirk(dev, id);
718 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
719 return -ENXIO;
720 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
721 return -ENODEV;
722
723 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
724 if (err < 0)
725 return err;
726
727 /*
728 * found a config. now register to ALSA
729 */
730
731 /* check whether it's already registered */
732 chip = NULL;
733 mutex_lock(®ister_mutex);
734 for (i = 0; i < SNDRV_CARDS; i++) {
735 if (usb_chip[i] && usb_chip[i]->dev == dev) {
736 if (atomic_read(&usb_chip[i]->shutdown)) {
737 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
738 err = -EIO;
739 goto __error;
740 }
741 chip = usb_chip[i];
742 atomic_inc(&chip->active); /* avoid autopm */
743 break;
744 }
745 }
746 if (! chip) {
747 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
748 if (err < 0)
749 goto __error;
750
751 /* it's a fresh one.
752 * now look for an empty slot and create a new card instance
753 */
754 for (i = 0; i < SNDRV_CARDS; i++)
755 if (!usb_chip[i] &&
756 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
757 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
758 if (enable[i]) {
759 err = snd_usb_audio_create(intf, dev, i, quirk,
760 id, &chip);
761 if (err < 0)
762 goto __error;
763 break;
764 } else if (vid[i] != -1 || pid[i] != -1) {
765 dev_info(&dev->dev,
766 "device (%04x:%04x) is disabled\n",
767 USB_ID_VENDOR(id),
768 USB_ID_PRODUCT(id));
769 err = -ENOENT;
770 goto __error;
771 }
772 }
773 if (!chip) {
774 dev_err(&dev->dev, "no available usb audio device\n");
775 err = -ENODEV;
776 goto __error;
777 }
778 }
779
780 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
781 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
782 err = -EINVAL;
783 goto __error;
784 }
785
786 dev_set_drvdata(&dev->dev, chip);
787
788 /*
789 * For devices with more than one control interface, we assume the
790 * first contains the audio controls. We might need a more specific
791 * check here in the future.
792 */
793 if (!chip->ctrl_intf)
794 chip->ctrl_intf = alts;
795
796 chip->txfr_quirk = 0;
797 err = 1; /* continue */
798 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
799 /* need some special handlings */
800 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
801 if (err < 0)
802 goto __error;
803 }
804
805 if (err > 0) {
806 /* create normal USB audio interfaces */
807 err = snd_usb_create_streams(chip, ifnum);
808 if (err < 0)
809 goto __error;
810 err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error);
811 if (err < 0)
812 goto __error;
813 }
814
815 if (chip->need_delayed_register) {
816 dev_info(&dev->dev,
817 "Found post-registration device assignment: %08x:%02x\n",
818 chip->usb_id, ifnum);
819 chip->need_delayed_register = false; /* clear again */
820 }
821
822 /* we are allowed to call snd_card_register() many times, but first
823 * check to see if a device needs to skip it or do anything special
824 */
825 if (!snd_usb_registration_quirk(chip, ifnum) &&
826 !check_delayed_register_option(chip, ifnum)) {
827 err = snd_card_register(chip->card);
828 if (err < 0)
829 goto __error;
830 }
831
832 if (quirk && quirk->shares_media_device) {
833 /* don't want to fail when snd_media_device_create() fails */
834 snd_media_device_create(chip, intf);
835 }
836
837 if (quirk)
838 chip->quirk_type = quirk->type;
839
840 usb_chip[chip->index] = chip;
841 chip->intf[chip->num_interfaces] = intf;
842 chip->num_interfaces++;
843 usb_set_intfdata(intf, chip);
844 atomic_dec(&chip->active);
845 mutex_unlock(®ister_mutex);
846 return 0;
847
848 __error:
849 if (chip) {
850 /* chip->active is inside the chip->card object,
851 * decrement before memory is possibly returned.
852 */
853 atomic_dec(&chip->active);
854 if (!chip->num_interfaces)
855 snd_card_free(chip->card);
856 }
857 mutex_unlock(®ister_mutex);
858 return err;
859}
860
861/*
862 * we need to take care of counter, since disconnection can be called also
863 * many times as well as usb_audio_probe().
864 */
865static void usb_audio_disconnect(struct usb_interface *intf)
866{
867 struct snd_usb_audio *chip = usb_get_intfdata(intf);
868 struct snd_card *card;
869 struct list_head *p;
870
871 if (chip == USB_AUDIO_IFACE_UNUSED)
872 return;
873
874 card = chip->card;
875
876 mutex_lock(®ister_mutex);
877 if (atomic_inc_return(&chip->shutdown) == 1) {
878 struct snd_usb_stream *as;
879 struct snd_usb_endpoint *ep;
880 struct usb_mixer_interface *mixer;
881
882 /* wait until all pending tasks done;
883 * they are protected by snd_usb_lock_shutdown()
884 */
885 wait_event(chip->shutdown_wait,
886 !atomic_read(&chip->usage_count));
887 snd_card_disconnect(card);
888 /* release the pcm resources */
889 list_for_each_entry(as, &chip->pcm_list, list) {
890 snd_usb_stream_disconnect(as);
891 }
892 /* release the endpoint resources */
893 list_for_each_entry(ep, &chip->ep_list, list) {
894 snd_usb_endpoint_release(ep);
895 }
896 /* release the midi resources */
897 list_for_each(p, &chip->midi_list) {
898 snd_usbmidi_disconnect(p);
899 }
900 /*
901 * Nice to check quirk && quirk->shares_media_device and
902 * then call the snd_media_device_delete(). Don't have
903 * access to the quirk here. snd_media_device_delete()
904 * accesses mixer_list
905 */
906 snd_media_device_delete(chip);
907
908 /* release mixer resources */
909 list_for_each_entry(mixer, &chip->mixer_list, list) {
910 snd_usb_mixer_disconnect(mixer);
911 }
912 }
913
914 if (chip->quirk_type == QUIRK_SETUP_DISABLE_AUTOSUSPEND)
915 usb_enable_autosuspend(interface_to_usbdev(intf));
916
917 chip->num_interfaces--;
918 if (chip->num_interfaces <= 0) {
919 usb_chip[chip->index] = NULL;
920 mutex_unlock(®ister_mutex);
921 snd_card_free_when_closed(card);
922 } else {
923 mutex_unlock(®ister_mutex);
924 }
925}
926
927/* lock the shutdown (disconnect) task and autoresume */
928int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
929{
930 int err;
931
932 atomic_inc(&chip->usage_count);
933 if (atomic_read(&chip->shutdown)) {
934 err = -EIO;
935 goto error;
936 }
937 err = snd_usb_autoresume(chip);
938 if (err < 0)
939 goto error;
940 return 0;
941
942 error:
943 if (atomic_dec_and_test(&chip->usage_count))
944 wake_up(&chip->shutdown_wait);
945 return err;
946}
947
948/* autosuspend and unlock the shutdown */
949void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
950{
951 snd_usb_autosuspend(chip);
952 if (atomic_dec_and_test(&chip->usage_count))
953 wake_up(&chip->shutdown_wait);
954}
955
956#ifdef CONFIG_PM
957
958int snd_usb_autoresume(struct snd_usb_audio *chip)
959{
960 int i, err;
961
962 if (atomic_read(&chip->shutdown))
963 return -EIO;
964 if (atomic_inc_return(&chip->active) != 1)
965 return 0;
966
967 for (i = 0; i < chip->num_interfaces; i++) {
968 err = usb_autopm_get_interface(chip->intf[i]);
969 if (err < 0) {
970 /* rollback */
971 while (--i >= 0)
972 usb_autopm_put_interface(chip->intf[i]);
973 atomic_dec(&chip->active);
974 return err;
975 }
976 }
977 return 0;
978}
979
980void snd_usb_autosuspend(struct snd_usb_audio *chip)
981{
982 int i;
983
984 if (atomic_read(&chip->shutdown))
985 return;
986 if (!atomic_dec_and_test(&chip->active))
987 return;
988
989 for (i = 0; i < chip->num_interfaces; i++)
990 usb_autopm_put_interface(chip->intf[i]);
991}
992
993static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
994{
995 struct snd_usb_audio *chip = usb_get_intfdata(intf);
996 struct snd_usb_stream *as;
997 struct snd_usb_endpoint *ep;
998 struct usb_mixer_interface *mixer;
999 struct list_head *p;
1000
1001 if (chip == USB_AUDIO_IFACE_UNUSED)
1002 return 0;
1003
1004 if (!chip->num_suspended_intf++) {
1005 list_for_each_entry(as, &chip->pcm_list, list)
1006 snd_usb_pcm_suspend(as);
1007 list_for_each_entry(ep, &chip->ep_list, list)
1008 snd_usb_endpoint_suspend(ep);
1009 list_for_each(p, &chip->midi_list)
1010 snd_usbmidi_suspend(p);
1011 list_for_each_entry(mixer, &chip->mixer_list, list)
1012 snd_usb_mixer_suspend(mixer);
1013 }
1014
1015 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1016 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1017 chip->system_suspend = chip->num_suspended_intf;
1018 }
1019
1020 return 0;
1021}
1022
1023static int usb_audio_resume(struct usb_interface *intf)
1024{
1025 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1026 struct snd_usb_stream *as;
1027 struct usb_mixer_interface *mixer;
1028 struct list_head *p;
1029 int err = 0;
1030
1031 if (chip == USB_AUDIO_IFACE_UNUSED)
1032 return 0;
1033
1034 atomic_inc(&chip->active); /* avoid autopm */
1035 if (chip->num_suspended_intf > 1)
1036 goto out;
1037
1038 list_for_each_entry(as, &chip->pcm_list, list) {
1039 err = snd_usb_pcm_resume(as);
1040 if (err < 0)
1041 goto err_out;
1042 }
1043
1044 /*
1045 * ALSA leaves material resumption to user space
1046 * we just notify and restart the mixers
1047 */
1048 list_for_each_entry(mixer, &chip->mixer_list, list) {
1049 err = snd_usb_mixer_resume(mixer);
1050 if (err < 0)
1051 goto err_out;
1052 }
1053
1054 list_for_each(p, &chip->midi_list) {
1055 snd_usbmidi_resume(p);
1056 }
1057
1058 out:
1059 if (chip->num_suspended_intf == chip->system_suspend) {
1060 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1061 chip->system_suspend = 0;
1062 }
1063 chip->num_suspended_intf--;
1064
1065err_out:
1066 atomic_dec(&chip->active); /* allow autopm after this point */
1067 return err;
1068}
1069#else
1070#define usb_audio_suspend NULL
1071#define usb_audio_resume NULL
1072#define usb_audio_resume NULL
1073#endif /* CONFIG_PM */
1074
1075static const struct usb_device_id usb_audio_ids [] = {
1076#include "quirks-table.h"
1077 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1078 .bInterfaceClass = USB_CLASS_AUDIO,
1079 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1080 { } /* Terminating entry */
1081};
1082MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1083
1084/*
1085 * entry point for linux usb interface
1086 */
1087
1088static struct usb_driver usb_audio_driver = {
1089 .name = "snd-usb-audio",
1090 .probe = usb_audio_probe,
1091 .disconnect = usb_audio_disconnect,
1092 .suspend = usb_audio_suspend,
1093 .resume = usb_audio_resume,
1094 .reset_resume = usb_audio_resume,
1095 .id_table = usb_audio_ids,
1096 .supports_autosuspend = 1,
1097};
1098
1099module_usb_driver(usb_audio_driver);
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 snd_usb_add_ctrl_interface_link(chip, interface, ctrlif);
210
211 if (! snd_usb_parse_audio_interface(chip, interface)) {
212 usb_set_interface(dev, interface, 0); /* reset the current interface */
213 return usb_driver_claim_interface(&usb_audio_driver, iface,
214 USB_AUDIO_IFACE_UNUSED);
215 }
216
217 return 0;
218}
219
220/*
221 * parse audio control descriptor and create pcm/midi streams
222 */
223static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
224{
225 struct usb_device *dev = chip->dev;
226 struct usb_host_interface *host_iface;
227 struct usb_interface_descriptor *altsd;
228 int i, protocol;
229
230 /* find audiocontrol interface */
231 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
232 altsd = get_iface_desc(host_iface);
233 protocol = altsd->bInterfaceProtocol;
234
235 switch (protocol) {
236 default:
237 dev_warn(&dev->dev,
238 "unknown interface protocol %#02x, assuming v1\n",
239 protocol);
240 fallthrough;
241
242 case UAC_VERSION_1: {
243 struct uac1_ac_header_descriptor *h1;
244 int rest_bytes;
245
246 h1 = snd_usb_find_csint_desc(host_iface->extra,
247 host_iface->extralen,
248 NULL, UAC_HEADER);
249 if (!h1 || h1->bLength < sizeof(*h1)) {
250 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
251 return -EINVAL;
252 }
253
254 rest_bytes = (void *)(host_iface->extra +
255 host_iface->extralen) - (void *)h1;
256
257 /* just to be sure -- this shouldn't hit at all */
258 if (rest_bytes <= 0) {
259 dev_err(&dev->dev, "invalid control header\n");
260 return -EINVAL;
261 }
262
263 if (rest_bytes < sizeof(*h1)) {
264 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
265 return -EINVAL;
266 }
267
268 if (!h1->bInCollection) {
269 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
270 return -EINVAL;
271 }
272
273 if (rest_bytes < h1->bLength) {
274 dev_err(&dev->dev, "invalid buffer length (v1)\n");
275 return -EINVAL;
276 }
277
278 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
279 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
280 return -EINVAL;
281 }
282
283 for (i = 0; i < h1->bInCollection; i++)
284 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
285
286 break;
287 }
288
289 case UAC_VERSION_2:
290 case UAC_VERSION_3: {
291 struct usb_interface_assoc_descriptor *assoc =
292 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
293
294 if (!assoc) {
295 /*
296 * Firmware writers cannot count to three. So to find
297 * the IAD on the NuForce UDH-100, also check the next
298 * interface.
299 */
300 struct usb_interface *iface =
301 usb_ifnum_to_if(dev, ctrlif + 1);
302 if (iface &&
303 iface->intf_assoc &&
304 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
305 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
306 assoc = iface->intf_assoc;
307 }
308
309 if (!assoc) {
310 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
311 return -EINVAL;
312 }
313
314 if (protocol == UAC_VERSION_3) {
315 int badd = assoc->bFunctionSubClass;
316
317 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
318 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
319 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
320 dev_err(&dev->dev,
321 "Unsupported UAC3 BADD profile\n");
322 return -EINVAL;
323 }
324
325 chip->badd_profile = badd;
326 }
327
328 for (i = 0; i < assoc->bInterfaceCount; i++) {
329 int intf = assoc->bFirstInterface + i;
330
331 if (intf != ctrlif)
332 snd_usb_create_stream(chip, ctrlif, intf);
333 }
334
335 break;
336 }
337 }
338
339 return 0;
340}
341
342/*
343 * Profile name preset table
344 */
345struct usb_audio_device_name {
346 u32 id;
347 const char *vendor_name;
348 const char *product_name;
349 const char *profile_name; /* override card->longname */
350};
351
352#define PROFILE_NAME(vid, pid, vendor, product, profile) \
353 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
354 .product_name = (product), .profile_name = (profile) }
355#define DEVICE_NAME(vid, pid, vendor, product) \
356 PROFILE_NAME(vid, pid, vendor, product, NULL)
357
358/* vendor/product and profile name presets, sorted in device id order */
359static const struct usb_audio_device_name usb_audio_names[] = {
360 /* HP Thunderbolt Dock Audio Headset */
361 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
362 "HP-Thunderbolt-Dock-Audio-Headset"),
363 /* HP Thunderbolt Dock Audio Module */
364 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
365 "HP-Thunderbolt-Dock-Audio-Module"),
366
367 /* Two entries for Gigabyte TRX40 Aorus Master:
368 * TRX40 Aorus Master has two USB-audio devices, one for the front
369 * headphone with ESS SABRE9218 DAC chip, while another for the rest
370 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
371 * Here we provide two distinct names for making UCM profiles easier.
372 */
373 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
374 "Gigabyte-Aorus-Master-Front-Headphone"),
375 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
376 "Gigabyte-Aorus-Master-Main-Audio"),
377
378 /* Gigabyte TRX40 Aorus Pro WiFi */
379 PROFILE_NAME(0x0414, 0xa002,
380 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
381
382 /* Creative/E-Mu devices */
383 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
384 /* Creative/Toshiba Multimedia Center SB-0500 */
385 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
386
387 /* Logitech Audio Devices */
388 DEVICE_NAME(0x046d, 0x0867, "Logitech, Inc.", "Logi-MeetUp"),
389 DEVICE_NAME(0x046d, 0x0874, "Logitech, Inc.", "Logi-Tap-Audio"),
390 DEVICE_NAME(0x046d, 0x087c, "Logitech, Inc.", "Logi-Huddle"),
391 DEVICE_NAME(0x046d, 0x0898, "Logitech, Inc.", "Logi-RB-Audio"),
392 DEVICE_NAME(0x046d, 0x08d2, "Logitech, Inc.", "Logi-RBM-Audio"),
393 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
394
395 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
396 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
397
398 /* ASUS ROG Zenith II: this machine has also two devices, one for
399 * the front headphone and another for the rest
400 */
401 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
402 "Zenith-II-Front-Headphone"),
403 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
404 "Zenith-II-Main-Audio"),
405
406 /* ASUS ROG Strix */
407 PROFILE_NAME(0x0b05, 0x1917,
408 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
409 /* ASUS PRIME TRX40 PRO-S */
410 PROFILE_NAME(0x0b05, 0x1918,
411 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
412
413 /* Dell WD15 Dock */
414 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
415 /* Dell WD19 Dock */
416 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
417
418 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
419
420 /*
421 * The original product_name is "USB Sound Device", however this name
422 * is also used by the CM106 based cards, so make it unique.
423 */
424 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
425 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
426
427 /* MSI TRX40 Creator */
428 PROFILE_NAME(0x0db0, 0x0d64,
429 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
430 /* MSI TRX40 */
431 PROFILE_NAME(0x0db0, 0x543d,
432 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
433
434 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
435
436 /* Dock/Stand for HP Engage Go */
437 PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock",
438 "HP-Engage-Go-Dock"),
439
440 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
441 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
442 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
443
444 /* aka. Serato Scratch Live DJ Box */
445 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
446
447 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
448 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
449 "Lenovo-ThinkStation-P620-Rear"),
450 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
451 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
452 "Lenovo-ThinkStation-P620-Main"),
453
454 /* Asrock TRX40 Creator */
455 PROFILE_NAME(0x26ce, 0x0a01,
456 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
457
458 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
459 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
460 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
461 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
462 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
463 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
464 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
465 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
466 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
467 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
468 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
469 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
470 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
471 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
472 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
473
474 { } /* terminator */
475};
476
477static const struct usb_audio_device_name *
478lookup_device_name(u32 id)
479{
480 static const struct usb_audio_device_name *p;
481
482 for (p = usb_audio_names; p->id; p++)
483 if (p->id == id)
484 return p;
485 return NULL;
486}
487
488/*
489 * free the chip instance
490 *
491 * here we have to do not much, since pcm and controls are already freed
492 *
493 */
494
495static void snd_usb_audio_free(struct snd_card *card)
496{
497 struct snd_usb_audio *chip = card->private_data;
498
499 snd_usb_endpoint_free_all(chip);
500 snd_usb_midi_v2_free_all(chip);
501
502 mutex_destroy(&chip->mutex);
503 if (!atomic_read(&chip->shutdown))
504 dev_set_drvdata(&chip->dev->dev, NULL);
505}
506
507static void usb_audio_make_shortname(struct usb_device *dev,
508 struct snd_usb_audio *chip,
509 const struct snd_usb_audio_quirk *quirk)
510{
511 struct snd_card *card = chip->card;
512 const struct usb_audio_device_name *preset;
513 const char *s = NULL;
514
515 preset = lookup_device_name(chip->usb_id);
516 if (preset && preset->product_name)
517 s = preset->product_name;
518 else if (quirk && quirk->product_name)
519 s = quirk->product_name;
520 if (s && *s) {
521 strscpy(card->shortname, s, sizeof(card->shortname));
522 return;
523 }
524
525 /* retrieve the device string as shortname */
526 if (!dev->descriptor.iProduct ||
527 usb_string(dev, dev->descriptor.iProduct,
528 card->shortname, sizeof(card->shortname)) <= 0) {
529 /* no name available from anywhere, so use ID */
530 sprintf(card->shortname, "USB Device %#04x:%#04x",
531 USB_ID_VENDOR(chip->usb_id),
532 USB_ID_PRODUCT(chip->usb_id));
533 }
534
535 strim(card->shortname);
536}
537
538static void usb_audio_make_longname(struct usb_device *dev,
539 struct snd_usb_audio *chip,
540 const struct snd_usb_audio_quirk *quirk)
541{
542 struct snd_card *card = chip->card;
543 const struct usb_audio_device_name *preset;
544 const char *s = NULL;
545 int len;
546
547 preset = lookup_device_name(chip->usb_id);
548
549 /* shortcut - if any pre-defined string is given, use it */
550 if (preset && preset->profile_name)
551 s = preset->profile_name;
552 if (s && *s) {
553 strscpy(card->longname, s, sizeof(card->longname));
554 return;
555 }
556
557 if (preset && preset->vendor_name)
558 s = preset->vendor_name;
559 else if (quirk && quirk->vendor_name)
560 s = quirk->vendor_name;
561 *card->longname = 0;
562 if (s && *s) {
563 strscpy(card->longname, s, sizeof(card->longname));
564 } else {
565 /* retrieve the vendor and device strings as longname */
566 if (dev->descriptor.iManufacturer)
567 usb_string(dev, dev->descriptor.iManufacturer,
568 card->longname, sizeof(card->longname));
569 /* we don't really care if there isn't any vendor string */
570 }
571 if (*card->longname) {
572 strim(card->longname);
573 if (*card->longname)
574 strlcat(card->longname, " ", sizeof(card->longname));
575 }
576
577 strlcat(card->longname, card->shortname, sizeof(card->longname));
578
579 len = strlcat(card->longname, " at ", sizeof(card->longname));
580
581 if (len < sizeof(card->longname))
582 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
583
584 switch (snd_usb_get_speed(dev)) {
585 case USB_SPEED_LOW:
586 strlcat(card->longname, ", low speed", sizeof(card->longname));
587 break;
588 case USB_SPEED_FULL:
589 strlcat(card->longname, ", full speed", sizeof(card->longname));
590 break;
591 case USB_SPEED_HIGH:
592 strlcat(card->longname, ", high speed", sizeof(card->longname));
593 break;
594 case USB_SPEED_SUPER:
595 strlcat(card->longname, ", super speed", sizeof(card->longname));
596 break;
597 case USB_SPEED_SUPER_PLUS:
598 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
599 break;
600 default:
601 break;
602 }
603}
604
605/*
606 * create a chip instance and set its names.
607 */
608static int snd_usb_audio_create(struct usb_interface *intf,
609 struct usb_device *dev, int idx,
610 const struct snd_usb_audio_quirk *quirk,
611 unsigned int usb_id,
612 struct snd_usb_audio **rchip)
613{
614 struct snd_card *card;
615 struct snd_usb_audio *chip;
616 int err;
617 char component[14];
618
619 *rchip = NULL;
620
621 switch (snd_usb_get_speed(dev)) {
622 case USB_SPEED_LOW:
623 case USB_SPEED_FULL:
624 case USB_SPEED_HIGH:
625 case USB_SPEED_SUPER:
626 case USB_SPEED_SUPER_PLUS:
627 break;
628 default:
629 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
630 return -ENXIO;
631 }
632
633 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
634 sizeof(*chip), &card);
635 if (err < 0) {
636 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
637 return err;
638 }
639
640 chip = card->private_data;
641 mutex_init(&chip->mutex);
642 init_waitqueue_head(&chip->shutdown_wait);
643 chip->index = idx;
644 chip->dev = dev;
645 chip->card = card;
646 chip->setup = device_setup[idx];
647 chip->generic_implicit_fb = implicit_fb[idx];
648 chip->autoclock = autoclock;
649 chip->lowlatency = lowlatency;
650 atomic_set(&chip->active, 1); /* avoid autopm during probing */
651 atomic_set(&chip->usage_count, 0);
652 atomic_set(&chip->shutdown, 0);
653
654 chip->usb_id = usb_id;
655 INIT_LIST_HEAD(&chip->pcm_list);
656 INIT_LIST_HEAD(&chip->ep_list);
657 INIT_LIST_HEAD(&chip->iface_ref_list);
658 INIT_LIST_HEAD(&chip->clock_ref_list);
659 INIT_LIST_HEAD(&chip->midi_list);
660 INIT_LIST_HEAD(&chip->midi_v2_list);
661 INIT_LIST_HEAD(&chip->mixer_list);
662
663 if (quirk_flags[idx])
664 chip->quirk_flags = quirk_flags[idx];
665 else
666 snd_usb_init_quirk_flags(chip);
667
668 card->private_free = snd_usb_audio_free;
669
670 strcpy(card->driver, "USB-Audio");
671 sprintf(component, "USB%04x:%04x",
672 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
673 snd_component_add(card, component);
674
675 usb_audio_make_shortname(dev, chip, quirk);
676 usb_audio_make_longname(dev, chip, quirk);
677
678 snd_usb_audio_create_proc(chip);
679
680 *rchip = chip;
681 return 0;
682}
683
684/* look for a matching quirk alias id */
685static bool get_alias_id(struct usb_device *dev, unsigned int *id)
686{
687 int i;
688 unsigned int src, dst;
689
690 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
691 if (!quirk_alias[i] ||
692 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
693 src != *id)
694 continue;
695 dev_info(&dev->dev,
696 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
697 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
698 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
699 *id = dst;
700 return true;
701 }
702
703 return false;
704}
705
706static int check_delayed_register_option(struct snd_usb_audio *chip)
707{
708 int i;
709 unsigned int id, inum;
710
711 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
712 if (delayed_register[i] &&
713 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
714 id == chip->usb_id)
715 return inum;
716 }
717
718 return -1;
719}
720
721static const struct usb_device_id usb_audio_ids[]; /* defined below */
722
723/* look for the last interface that matches with our ids and remember it */
724static void find_last_interface(struct snd_usb_audio *chip)
725{
726 struct usb_host_config *config = chip->dev->actconfig;
727 struct usb_interface *intf;
728 int i;
729
730 if (!config)
731 return;
732 for (i = 0; i < config->desc.bNumInterfaces; i++) {
733 intf = config->interface[i];
734 if (usb_match_id(intf, usb_audio_ids))
735 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
736 }
737 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
738}
739
740/* look for the corresponding quirk */
741static const struct snd_usb_audio_quirk *
742get_alias_quirk(struct usb_device *dev, unsigned int id)
743{
744 const struct usb_device_id *p;
745
746 for (p = usb_audio_ids; p->match_flags; p++) {
747 /* FIXME: this checks only vendor:product pair in the list */
748 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
749 USB_DEVICE_ID_MATCH_DEVICE &&
750 p->idVendor == USB_ID_VENDOR(id) &&
751 p->idProduct == USB_ID_PRODUCT(id))
752 return (const struct snd_usb_audio_quirk *)p->driver_info;
753 }
754
755 return NULL;
756}
757
758/* register card if we reach to the last interface or to the specified
759 * one given via option
760 */
761static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
762{
763 if (check_delayed_register_option(chip) == ifnum ||
764 chip->last_iface == ifnum ||
765 usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface)))
766 return snd_card_register(chip->card);
767 return 0;
768}
769
770/*
771 * probe the active usb device
772 *
773 * note that this can be called multiple times per a device, when it
774 * includes multiple audio control interfaces.
775 *
776 * thus we check the usb device pointer and creates the card instance
777 * only at the first time. the successive calls of this function will
778 * append the pcm interface to the corresponding card.
779 */
780static int usb_audio_probe(struct usb_interface *intf,
781 const struct usb_device_id *usb_id)
782{
783 struct usb_device *dev = interface_to_usbdev(intf);
784 const struct snd_usb_audio_quirk *quirk =
785 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
786 struct snd_usb_audio *chip;
787 int i, err;
788 struct usb_host_interface *alts;
789 int ifnum;
790 u32 id;
791
792 alts = &intf->altsetting[0];
793 ifnum = get_iface_desc(alts)->bInterfaceNumber;
794 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
795 le16_to_cpu(dev->descriptor.idProduct));
796 if (get_alias_id(dev, &id))
797 quirk = get_alias_quirk(dev, id);
798 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
799 return -ENXIO;
800 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
801 return -ENODEV;
802
803 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
804 if (err < 0)
805 return err;
806
807 /*
808 * found a config. now register to ALSA
809 */
810
811 /* check whether it's already registered */
812 chip = NULL;
813 mutex_lock(®ister_mutex);
814 for (i = 0; i < SNDRV_CARDS; i++) {
815 if (usb_chip[i] && usb_chip[i]->dev == dev) {
816 if (atomic_read(&usb_chip[i]->shutdown)) {
817 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
818 err = -EIO;
819 goto __error;
820 }
821 chip = usb_chip[i];
822 atomic_inc(&chip->active); /* avoid autopm */
823 break;
824 }
825 }
826 if (! chip) {
827 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
828 if (err < 0)
829 goto __error;
830
831 /* it's a fresh one.
832 * now look for an empty slot and create a new card instance
833 */
834 for (i = 0; i < SNDRV_CARDS; i++)
835 if (!usb_chip[i] &&
836 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
837 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
838 if (enable[i]) {
839 err = snd_usb_audio_create(intf, dev, i, quirk,
840 id, &chip);
841 if (err < 0)
842 goto __error;
843 break;
844 } else if (vid[i] != -1 || pid[i] != -1) {
845 dev_info(&dev->dev,
846 "device (%04x:%04x) is disabled\n",
847 USB_ID_VENDOR(id),
848 USB_ID_PRODUCT(id));
849 err = -ENOENT;
850 goto __error;
851 }
852 }
853 if (!chip) {
854 dev_err(&dev->dev, "no available usb audio device\n");
855 err = -ENODEV;
856 goto __error;
857 }
858 find_last_interface(chip);
859 }
860
861 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
862 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
863 err = -EINVAL;
864 goto __error;
865 }
866
867 dev_set_drvdata(&dev->dev, chip);
868
869 if (ignore_ctl_error)
870 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
871
872 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
873 usb_disable_autosuspend(interface_to_usbdev(intf));
874
875 /*
876 * For devices with more than one control interface, we assume the
877 * first contains the audio controls. We might need a more specific
878 * check here in the future.
879 */
880 if (!chip->ctrl_intf)
881 chip->ctrl_intf = alts;
882
883 err = 1; /* continue */
884 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
885 /* need some special handlings */
886 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
887 if (err < 0)
888 goto __error;
889 }
890
891 if (err > 0) {
892 /* create normal USB audio interfaces */
893 err = snd_usb_create_streams(chip, ifnum);
894 if (err < 0)
895 goto __error;
896 err = snd_usb_create_mixer(chip, ifnum);
897 if (err < 0)
898 goto __error;
899 }
900
901 if (chip->need_delayed_register) {
902 dev_info(&dev->dev,
903 "Found post-registration device assignment: %08x:%02x\n",
904 chip->usb_id, ifnum);
905 chip->need_delayed_register = false; /* clear again */
906 }
907
908 err = try_to_register_card(chip, ifnum);
909 if (err < 0)
910 goto __error_no_register;
911
912 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
913 /* don't want to fail when snd_media_device_create() fails */
914 snd_media_device_create(chip, intf);
915 }
916
917 if (quirk)
918 chip->quirk_type = quirk->type;
919
920 usb_chip[chip->index] = chip;
921 chip->intf[chip->num_interfaces] = intf;
922 chip->num_interfaces++;
923 usb_set_intfdata(intf, chip);
924 atomic_dec(&chip->active);
925 mutex_unlock(®ister_mutex);
926 return 0;
927
928 __error:
929 /* in the case of error in secondary interface, still try to register */
930 if (chip)
931 try_to_register_card(chip, ifnum);
932
933 __error_no_register:
934 if (chip) {
935 /* chip->active is inside the chip->card object,
936 * decrement before memory is possibly returned.
937 */
938 atomic_dec(&chip->active);
939 if (!chip->num_interfaces)
940 snd_card_free(chip->card);
941 }
942 mutex_unlock(®ister_mutex);
943 return err;
944}
945
946/*
947 * we need to take care of counter, since disconnection can be called also
948 * many times as well as usb_audio_probe().
949 */
950static void usb_audio_disconnect(struct usb_interface *intf)
951{
952 struct snd_usb_audio *chip = usb_get_intfdata(intf);
953 struct snd_card *card;
954 struct list_head *p;
955
956 if (chip == USB_AUDIO_IFACE_UNUSED)
957 return;
958
959 card = chip->card;
960
961 mutex_lock(®ister_mutex);
962 if (atomic_inc_return(&chip->shutdown) == 1) {
963 struct snd_usb_stream *as;
964 struct snd_usb_endpoint *ep;
965 struct usb_mixer_interface *mixer;
966
967 /* wait until all pending tasks done;
968 * they are protected by snd_usb_lock_shutdown()
969 */
970 wait_event(chip->shutdown_wait,
971 !atomic_read(&chip->usage_count));
972 snd_card_disconnect(card);
973 /* release the pcm resources */
974 list_for_each_entry(as, &chip->pcm_list, list) {
975 snd_usb_stream_disconnect(as);
976 }
977 /* release the endpoint resources */
978 list_for_each_entry(ep, &chip->ep_list, list) {
979 snd_usb_endpoint_release(ep);
980 }
981 /* release the midi resources */
982 list_for_each(p, &chip->midi_list) {
983 snd_usbmidi_disconnect(p);
984 }
985 snd_usb_midi_v2_disconnect_all(chip);
986 /*
987 * Nice to check quirk && quirk->shares_media_device and
988 * then call the snd_media_device_delete(). Don't have
989 * access to the quirk here. snd_media_device_delete()
990 * accesses mixer_list
991 */
992 snd_media_device_delete(chip);
993
994 /* release mixer resources */
995 list_for_each_entry(mixer, &chip->mixer_list, list) {
996 snd_usb_mixer_disconnect(mixer);
997 }
998 }
999
1000 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
1001 usb_enable_autosuspend(interface_to_usbdev(intf));
1002
1003 chip->num_interfaces--;
1004 if (chip->num_interfaces <= 0) {
1005 usb_chip[chip->index] = NULL;
1006 mutex_unlock(®ister_mutex);
1007 snd_card_free_when_closed(card);
1008 } else {
1009 mutex_unlock(®ister_mutex);
1010 }
1011}
1012
1013/* lock the shutdown (disconnect) task and autoresume */
1014int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1015{
1016 int err;
1017
1018 atomic_inc(&chip->usage_count);
1019 if (atomic_read(&chip->shutdown)) {
1020 err = -EIO;
1021 goto error;
1022 }
1023 err = snd_usb_autoresume(chip);
1024 if (err < 0)
1025 goto error;
1026 return 0;
1027
1028 error:
1029 if (atomic_dec_and_test(&chip->usage_count))
1030 wake_up(&chip->shutdown_wait);
1031 return err;
1032}
1033
1034/* autosuspend and unlock the shutdown */
1035void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1036{
1037 snd_usb_autosuspend(chip);
1038 if (atomic_dec_and_test(&chip->usage_count))
1039 wake_up(&chip->shutdown_wait);
1040}
1041
1042int snd_usb_autoresume(struct snd_usb_audio *chip)
1043{
1044 int i, err;
1045
1046 if (atomic_read(&chip->shutdown))
1047 return -EIO;
1048 if (atomic_inc_return(&chip->active) != 1)
1049 return 0;
1050
1051 for (i = 0; i < chip->num_interfaces; i++) {
1052 err = usb_autopm_get_interface(chip->intf[i]);
1053 if (err < 0) {
1054 /* rollback */
1055 while (--i >= 0)
1056 usb_autopm_put_interface(chip->intf[i]);
1057 atomic_dec(&chip->active);
1058 return err;
1059 }
1060 }
1061 return 0;
1062}
1063
1064void snd_usb_autosuspend(struct snd_usb_audio *chip)
1065{
1066 int i;
1067
1068 if (atomic_read(&chip->shutdown))
1069 return;
1070 if (!atomic_dec_and_test(&chip->active))
1071 return;
1072
1073 for (i = 0; i < chip->num_interfaces; i++)
1074 usb_autopm_put_interface(chip->intf[i]);
1075}
1076
1077static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1078{
1079 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1080 struct snd_usb_stream *as;
1081 struct snd_usb_endpoint *ep;
1082 struct usb_mixer_interface *mixer;
1083 struct list_head *p;
1084
1085 if (chip == USB_AUDIO_IFACE_UNUSED)
1086 return 0;
1087
1088 if (!chip->num_suspended_intf++) {
1089 list_for_each_entry(as, &chip->pcm_list, list)
1090 snd_usb_pcm_suspend(as);
1091 list_for_each_entry(ep, &chip->ep_list, list)
1092 snd_usb_endpoint_suspend(ep);
1093 list_for_each(p, &chip->midi_list)
1094 snd_usbmidi_suspend(p);
1095 list_for_each_entry(mixer, &chip->mixer_list, list)
1096 snd_usb_mixer_suspend(mixer);
1097 snd_usb_midi_v2_suspend_all(chip);
1098 }
1099
1100 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1101 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1102 chip->system_suspend = chip->num_suspended_intf;
1103 }
1104
1105 return 0;
1106}
1107
1108static int usb_audio_resume(struct usb_interface *intf)
1109{
1110 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1111 struct snd_usb_stream *as;
1112 struct usb_mixer_interface *mixer;
1113 struct list_head *p;
1114 int err = 0;
1115
1116 if (chip == USB_AUDIO_IFACE_UNUSED)
1117 return 0;
1118
1119 atomic_inc(&chip->active); /* avoid autopm */
1120 if (chip->num_suspended_intf > 1)
1121 goto out;
1122
1123 list_for_each_entry(as, &chip->pcm_list, list) {
1124 err = snd_usb_pcm_resume(as);
1125 if (err < 0)
1126 goto err_out;
1127 }
1128
1129 /*
1130 * ALSA leaves material resumption to user space
1131 * we just notify and restart the mixers
1132 */
1133 list_for_each_entry(mixer, &chip->mixer_list, list) {
1134 err = snd_usb_mixer_resume(mixer);
1135 if (err < 0)
1136 goto err_out;
1137 }
1138
1139 list_for_each(p, &chip->midi_list) {
1140 snd_usbmidi_resume(p);
1141 }
1142
1143 snd_usb_midi_v2_resume_all(chip);
1144
1145 out:
1146 if (chip->num_suspended_intf == chip->system_suspend) {
1147 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1148 chip->system_suspend = 0;
1149 }
1150 chip->num_suspended_intf--;
1151
1152err_out:
1153 atomic_dec(&chip->active); /* allow autopm after this point */
1154 return err;
1155}
1156
1157static const struct usb_device_id usb_audio_ids [] = {
1158#include "quirks-table.h"
1159 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1160 .bInterfaceClass = USB_CLASS_AUDIO,
1161 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1162 { } /* Terminating entry */
1163};
1164MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1165
1166/*
1167 * entry point for linux usb interface
1168 */
1169
1170static struct usb_driver usb_audio_driver = {
1171 .name = "snd-usb-audio",
1172 .probe = usb_audio_probe,
1173 .disconnect = usb_audio_disconnect,
1174 .suspend = usb_audio_suspend,
1175 .resume = usb_audio_resume,
1176 .reset_resume = usb_audio_resume,
1177 .id_table = usb_audio_ids,
1178 .supports_autosuspend = 1,
1179};
1180
1181module_usb_driver(usb_audio_driver);