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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 "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);
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 "debug.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");
62MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
67static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
68/* Vendor/product IDs for this card */
69static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
70static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
71static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
72static bool ignore_ctl_error;
73static bool autoclock = true;
74static char *quirk_alias[SNDRV_CARDS];
75
76bool snd_usb_use_vmalloc = true;
77
78module_param_array(index, int, NULL, 0444);
79MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
80module_param_array(id, charp, NULL, 0444);
81MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
82module_param_array(enable, bool, NULL, 0444);
83MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
84module_param_array(vid, int, NULL, 0444);
85MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
86module_param_array(pid, int, NULL, 0444);
87MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
88module_param_array(device_setup, int, NULL, 0444);
89MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
90module_param(ignore_ctl_error, bool, 0444);
91MODULE_PARM_DESC(ignore_ctl_error,
92 "Ignore errors from USB controller for mixer interfaces.");
93module_param(autoclock, bool, 0444);
94MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
95module_param_array(quirk_alias, charp, NULL, 0444);
96MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
97module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
98MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
99
100/*
101 * we keep the snd_usb_audio_t instances by ourselves for merging
102 * the all interfaces on the same card as one sound device.
103 */
104
105static DEFINE_MUTEX(register_mutex);
106static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
107static struct usb_driver usb_audio_driver;
108
109/*
110 * disconnect streams
111 * called from usb_audio_disconnect()
112 */
113static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
114{
115 int idx;
116 struct snd_usb_substream *subs;
117
118 for (idx = 0; idx < 2; idx++) {
119 subs = &as->substream[idx];
120 if (!subs->num_formats)
121 continue;
122 subs->interface = -1;
123 subs->data_endpoint = NULL;
124 subs->sync_endpoint = NULL;
125 }
126}
127
128static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
129{
130 struct usb_device *dev = chip->dev;
131 struct usb_host_interface *alts;
132 struct usb_interface_descriptor *altsd;
133 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
134
135 if (!iface) {
136 dev_err(&dev->dev, "%u:%d : does not exist\n",
137 ctrlif, interface);
138 return -EINVAL;
139 }
140
141 alts = &iface->altsetting[0];
142 altsd = get_iface_desc(alts);
143
144 /*
145 * Android with both accessory and audio interfaces enabled gets the
146 * interface numbers wrong.
147 */
148 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
149 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
150 interface == 0 &&
151 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
152 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
153 interface = 2;
154 iface = usb_ifnum_to_if(dev, interface);
155 if (!iface)
156 return -EINVAL;
157 alts = &iface->altsetting[0];
158 altsd = get_iface_desc(alts);
159 }
160
161 if (usb_interface_claimed(iface)) {
162 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
163 ctrlif, interface);
164 return -EINVAL;
165 }
166
167 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
168 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
169 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
170 int err = __snd_usbmidi_create(chip->card, iface,
171 &chip->midi_list, NULL,
172 chip->usb_id);
173 if (err < 0) {
174 dev_err(&dev->dev,
175 "%u:%d: cannot create sequencer device\n",
176 ctrlif, interface);
177 return -EINVAL;
178 }
179 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
180
181 return 0;
182 }
183
184 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
185 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
186 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
187 dev_dbg(&dev->dev,
188 "%u:%d: skipping non-supported interface %d\n",
189 ctrlif, interface, altsd->bInterfaceClass);
190 /* skip non-supported classes */
191 return -EINVAL;
192 }
193
194 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
195 dev_err(&dev->dev, "low speed audio streaming not supported\n");
196 return -EINVAL;
197 }
198
199 if (! snd_usb_parse_audio_interface(chip, interface)) {
200 usb_set_interface(dev, interface, 0); /* reset the current interface */
201 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
202 }
203
204 return 0;
205}
206
207/*
208 * parse audio control descriptor and create pcm/midi streams
209 */
210static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
211{
212 struct usb_device *dev = chip->dev;
213 struct usb_host_interface *host_iface;
214 struct usb_interface_descriptor *altsd;
215 int i, protocol;
216
217 /* find audiocontrol interface */
218 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
219 altsd = get_iface_desc(host_iface);
220 protocol = altsd->bInterfaceProtocol;
221
222 switch (protocol) {
223 default:
224 dev_warn(&dev->dev,
225 "unknown interface protocol %#02x, assuming v1\n",
226 protocol);
227 /* fall through */
228
229 case UAC_VERSION_1: {
230 struct uac1_ac_header_descriptor *h1;
231 int rest_bytes;
232
233 h1 = snd_usb_find_csint_desc(host_iface->extra,
234 host_iface->extralen,
235 NULL, UAC_HEADER);
236 if (!h1 || h1->bLength < sizeof(*h1)) {
237 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
238 return -EINVAL;
239 }
240
241 rest_bytes = (void *)(host_iface->extra +
242 host_iface->extralen) - (void *)h1;
243
244 /* just to be sure -- this shouldn't hit at all */
245 if (rest_bytes <= 0) {
246 dev_err(&dev->dev, "invalid control header\n");
247 return -EINVAL;
248 }
249
250 if (rest_bytes < sizeof(*h1)) {
251 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
252 return -EINVAL;
253 }
254
255 if (!h1->bInCollection) {
256 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
257 return -EINVAL;
258 }
259
260 if (rest_bytes < h1->bLength) {
261 dev_err(&dev->dev, "invalid buffer length (v1)\n");
262 return -EINVAL;
263 }
264
265 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
266 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
267 return -EINVAL;
268 }
269
270 for (i = 0; i < h1->bInCollection; i++)
271 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
272
273 break;
274 }
275
276 case UAC_VERSION_2:
277 case UAC_VERSION_3: {
278 struct usb_interface_assoc_descriptor *assoc =
279 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
280
281 if (!assoc) {
282 /*
283 * Firmware writers cannot count to three. So to find
284 * the IAD on the NuForce UDH-100, also check the next
285 * interface.
286 */
287 struct usb_interface *iface =
288 usb_ifnum_to_if(dev, ctrlif + 1);
289 if (iface &&
290 iface->intf_assoc &&
291 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
292 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
293 assoc = iface->intf_assoc;
294 }
295
296 if (!assoc) {
297 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
298 return -EINVAL;
299 }
300
301 if (protocol == UAC_VERSION_3) {
302 int badd = assoc->bFunctionSubClass;
303
304 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
305 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
306 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
307 dev_err(&dev->dev,
308 "Unsupported UAC3 BADD profile\n");
309 return -EINVAL;
310 }
311
312 chip->badd_profile = badd;
313 }
314
315 for (i = 0; i < assoc->bInterfaceCount; i++) {
316 int intf = assoc->bFirstInterface + i;
317
318 if (intf != ctrlif)
319 snd_usb_create_stream(chip, ctrlif, intf);
320 }
321
322 break;
323 }
324 }
325
326 return 0;
327}
328
329/*
330 * free the chip instance
331 *
332 * here we have to do not much, since pcm and controls are already freed
333 *
334 */
335
336static void snd_usb_audio_free(struct snd_card *card)
337{
338 struct snd_usb_audio *chip = card->private_data;
339 struct snd_usb_endpoint *ep, *n;
340
341 list_for_each_entry_safe(ep, n, &chip->ep_list, list)
342 snd_usb_endpoint_free(ep);
343
344 mutex_destroy(&chip->mutex);
345 if (!atomic_read(&chip->shutdown))
346 dev_set_drvdata(&chip->dev->dev, NULL);
347}
348
349static void usb_audio_make_shortname(struct usb_device *dev,
350 struct snd_usb_audio *chip,
351 const struct snd_usb_audio_quirk *quirk)
352{
353 struct snd_card *card = chip->card;
354
355 if (quirk && quirk->product_name && *quirk->product_name) {
356 strlcpy(card->shortname, quirk->product_name,
357 sizeof(card->shortname));
358 return;
359 }
360
361 /* retrieve the device string as shortname */
362 if (!dev->descriptor.iProduct ||
363 usb_string(dev, dev->descriptor.iProduct,
364 card->shortname, sizeof(card->shortname)) <= 0) {
365 /* no name available from anywhere, so use ID */
366 sprintf(card->shortname, "USB Device %#04x:%#04x",
367 USB_ID_VENDOR(chip->usb_id),
368 USB_ID_PRODUCT(chip->usb_id));
369 }
370
371 strim(card->shortname);
372}
373
374static void usb_audio_make_longname(struct usb_device *dev,
375 struct snd_usb_audio *chip,
376 const struct snd_usb_audio_quirk *quirk)
377{
378 struct snd_card *card = chip->card;
379 int len;
380
381 /* shortcut - if any pre-defined string is given, use it */
382 if (quirk && quirk->profile_name && *quirk->profile_name) {
383 strlcpy(card->longname, quirk->profile_name,
384 sizeof(card->longname));
385 return;
386 }
387
388 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
389 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
390 } else {
391 /* retrieve the vendor and device strings as longname */
392 if (dev->descriptor.iManufacturer)
393 len = usb_string(dev, dev->descriptor.iManufacturer,
394 card->longname, sizeof(card->longname));
395 else
396 len = 0;
397 /* we don't really care if there isn't any vendor string */
398 }
399 if (len > 0) {
400 strim(card->longname);
401 if (*card->longname)
402 strlcat(card->longname, " ", sizeof(card->longname));
403 }
404
405 strlcat(card->longname, card->shortname, sizeof(card->longname));
406
407 len = strlcat(card->longname, " at ", sizeof(card->longname));
408
409 if (len < sizeof(card->longname))
410 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
411
412 switch (snd_usb_get_speed(dev)) {
413 case USB_SPEED_LOW:
414 strlcat(card->longname, ", low speed", sizeof(card->longname));
415 break;
416 case USB_SPEED_FULL:
417 strlcat(card->longname, ", full speed", sizeof(card->longname));
418 break;
419 case USB_SPEED_HIGH:
420 strlcat(card->longname, ", high speed", sizeof(card->longname));
421 break;
422 case USB_SPEED_SUPER:
423 strlcat(card->longname, ", super speed", sizeof(card->longname));
424 break;
425 case USB_SPEED_SUPER_PLUS:
426 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
427 break;
428 default:
429 break;
430 }
431}
432
433/*
434 * create a chip instance and set its names.
435 */
436static int snd_usb_audio_create(struct usb_interface *intf,
437 struct usb_device *dev, int idx,
438 const struct snd_usb_audio_quirk *quirk,
439 unsigned int usb_id,
440 struct snd_usb_audio **rchip)
441{
442 struct snd_card *card;
443 struct snd_usb_audio *chip;
444 int err;
445 char component[14];
446
447 *rchip = NULL;
448
449 switch (snd_usb_get_speed(dev)) {
450 case USB_SPEED_LOW:
451 case USB_SPEED_FULL:
452 case USB_SPEED_HIGH:
453 case USB_SPEED_WIRELESS:
454 case USB_SPEED_SUPER:
455 case USB_SPEED_SUPER_PLUS:
456 break;
457 default:
458 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
459 return -ENXIO;
460 }
461
462 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
463 sizeof(*chip), &card);
464 if (err < 0) {
465 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
466 return err;
467 }
468
469 chip = card->private_data;
470 mutex_init(&chip->mutex);
471 init_waitqueue_head(&chip->shutdown_wait);
472 chip->index = idx;
473 chip->dev = dev;
474 chip->card = card;
475 chip->setup = device_setup[idx];
476 chip->autoclock = autoclock;
477 atomic_set(&chip->active, 1); /* avoid autopm during probing */
478 atomic_set(&chip->usage_count, 0);
479 atomic_set(&chip->shutdown, 0);
480
481 chip->usb_id = usb_id;
482 INIT_LIST_HEAD(&chip->pcm_list);
483 INIT_LIST_HEAD(&chip->ep_list);
484 INIT_LIST_HEAD(&chip->midi_list);
485 INIT_LIST_HEAD(&chip->mixer_list);
486
487 card->private_free = snd_usb_audio_free;
488
489 strcpy(card->driver, "USB-Audio");
490 sprintf(component, "USB%04x:%04x",
491 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
492 snd_component_add(card, component);
493
494 usb_audio_make_shortname(dev, chip, quirk);
495 usb_audio_make_longname(dev, chip, quirk);
496
497 snd_usb_audio_create_proc(chip);
498
499 *rchip = chip;
500 return 0;
501}
502
503/* look for a matching quirk alias id */
504static bool get_alias_id(struct usb_device *dev, unsigned int *id)
505{
506 int i;
507 unsigned int src, dst;
508
509 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
510 if (!quirk_alias[i] ||
511 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
512 src != *id)
513 continue;
514 dev_info(&dev->dev,
515 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
516 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
517 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
518 *id = dst;
519 return true;
520 }
521
522 return false;
523}
524
525static const struct usb_device_id usb_audio_ids[]; /* defined below */
526
527/* look for the corresponding quirk */
528static const struct snd_usb_audio_quirk *
529get_alias_quirk(struct usb_device *dev, unsigned int id)
530{
531 const struct usb_device_id *p;
532
533 for (p = usb_audio_ids; p->match_flags; p++) {
534 /* FIXME: this checks only vendor:product pair in the list */
535 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
536 USB_DEVICE_ID_MATCH_DEVICE &&
537 p->idVendor == USB_ID_VENDOR(id) &&
538 p->idProduct == USB_ID_PRODUCT(id))
539 return (const struct snd_usb_audio_quirk *)p->driver_info;
540 }
541
542 return NULL;
543}
544
545/*
546 * probe the active usb device
547 *
548 * note that this can be called multiple times per a device, when it
549 * includes multiple audio control interfaces.
550 *
551 * thus we check the usb device pointer and creates the card instance
552 * only at the first time. the successive calls of this function will
553 * append the pcm interface to the corresponding card.
554 */
555static int usb_audio_probe(struct usb_interface *intf,
556 const struct usb_device_id *usb_id)
557{
558 struct usb_device *dev = interface_to_usbdev(intf);
559 const struct snd_usb_audio_quirk *quirk =
560 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
561 struct snd_usb_audio *chip;
562 int i, err;
563 struct usb_host_interface *alts;
564 int ifnum;
565 u32 id;
566
567 alts = &intf->altsetting[0];
568 ifnum = get_iface_desc(alts)->bInterfaceNumber;
569 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
570 le16_to_cpu(dev->descriptor.idProduct));
571 if (get_alias_id(dev, &id))
572 quirk = get_alias_quirk(dev, id);
573 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
574 return -ENXIO;
575
576 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
577 if (err < 0)
578 return err;
579
580 /*
581 * found a config. now register to ALSA
582 */
583
584 /* check whether it's already registered */
585 chip = NULL;
586 mutex_lock(®ister_mutex);
587 for (i = 0; i < SNDRV_CARDS; i++) {
588 if (usb_chip[i] && usb_chip[i]->dev == dev) {
589 if (atomic_read(&usb_chip[i]->shutdown)) {
590 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
591 err = -EIO;
592 goto __error;
593 }
594 chip = usb_chip[i];
595 atomic_inc(&chip->active); /* avoid autopm */
596 break;
597 }
598 }
599 if (! chip) {
600 /* it's a fresh one.
601 * now look for an empty slot and create a new card instance
602 */
603 for (i = 0; i < SNDRV_CARDS; i++)
604 if (!usb_chip[i] &&
605 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
606 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
607 if (enable[i]) {
608 err = snd_usb_audio_create(intf, dev, i, quirk,
609 id, &chip);
610 if (err < 0)
611 goto __error;
612 chip->pm_intf = intf;
613 break;
614 } else if (vid[i] != -1 || pid[i] != -1) {
615 dev_info(&dev->dev,
616 "device (%04x:%04x) is disabled\n",
617 USB_ID_VENDOR(id),
618 USB_ID_PRODUCT(id));
619 err = -ENOENT;
620 goto __error;
621 }
622 }
623 if (!chip) {
624 dev_err(&dev->dev, "no available usb audio device\n");
625 err = -ENODEV;
626 goto __error;
627 }
628 }
629 dev_set_drvdata(&dev->dev, chip);
630
631 /*
632 * For devices with more than one control interface, we assume the
633 * first contains the audio controls. We might need a more specific
634 * check here in the future.
635 */
636 if (!chip->ctrl_intf)
637 chip->ctrl_intf = alts;
638
639 chip->txfr_quirk = 0;
640 err = 1; /* continue */
641 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
642 /* need some special handlings */
643 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
644 if (err < 0)
645 goto __error;
646 }
647
648 if (err > 0) {
649 /* create normal USB audio interfaces */
650 err = snd_usb_create_streams(chip, ifnum);
651 if (err < 0)
652 goto __error;
653 err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error);
654 if (err < 0)
655 goto __error;
656 }
657
658 /* we are allowed to call snd_card_register() many times */
659 err = snd_card_register(chip->card);
660 if (err < 0)
661 goto __error;
662
663 if (quirk && quirk->shares_media_device) {
664 /* don't want to fail when snd_media_device_create() fails */
665 snd_media_device_create(chip, intf);
666 }
667
668 usb_chip[chip->index] = chip;
669 chip->num_interfaces++;
670 usb_set_intfdata(intf, chip);
671 atomic_dec(&chip->active);
672 mutex_unlock(®ister_mutex);
673 return 0;
674
675 __error:
676 if (chip) {
677 /* chip->active is inside the chip->card object,
678 * decrement before memory is possibly returned.
679 */
680 atomic_dec(&chip->active);
681 if (!chip->num_interfaces)
682 snd_card_free(chip->card);
683 }
684 mutex_unlock(®ister_mutex);
685 return err;
686}
687
688/*
689 * we need to take care of counter, since disconnection can be called also
690 * many times as well as usb_audio_probe().
691 */
692static void usb_audio_disconnect(struct usb_interface *intf)
693{
694 struct snd_usb_audio *chip = usb_get_intfdata(intf);
695 struct snd_card *card;
696 struct list_head *p;
697
698 if (chip == (void *)-1L)
699 return;
700
701 card = chip->card;
702
703 mutex_lock(®ister_mutex);
704 if (atomic_inc_return(&chip->shutdown) == 1) {
705 struct snd_usb_stream *as;
706 struct snd_usb_endpoint *ep;
707 struct usb_mixer_interface *mixer;
708
709 /* wait until all pending tasks done;
710 * they are protected by snd_usb_lock_shutdown()
711 */
712 wait_event(chip->shutdown_wait,
713 !atomic_read(&chip->usage_count));
714 snd_card_disconnect(card);
715 /* release the pcm resources */
716 list_for_each_entry(as, &chip->pcm_list, list) {
717 snd_usb_stream_disconnect(as);
718 }
719 /* release the endpoint resources */
720 list_for_each_entry(ep, &chip->ep_list, list) {
721 snd_usb_endpoint_release(ep);
722 }
723 /* release the midi resources */
724 list_for_each(p, &chip->midi_list) {
725 snd_usbmidi_disconnect(p);
726 }
727 /*
728 * Nice to check quirk && quirk->shares_media_device and
729 * then call the snd_media_device_delete(). Don't have
730 * access to the quirk here. snd_media_device_delete()
731 * accesses mixer_list
732 */
733 snd_media_device_delete(chip);
734
735 /* release mixer resources */
736 list_for_each_entry(mixer, &chip->mixer_list, list) {
737 snd_usb_mixer_disconnect(mixer);
738 }
739 }
740
741 chip->num_interfaces--;
742 if (chip->num_interfaces <= 0) {
743 usb_chip[chip->index] = NULL;
744 mutex_unlock(®ister_mutex);
745 snd_card_free_when_closed(card);
746 } else {
747 mutex_unlock(®ister_mutex);
748 }
749}
750
751/* lock the shutdown (disconnect) task and autoresume */
752int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
753{
754 int err;
755
756 atomic_inc(&chip->usage_count);
757 if (atomic_read(&chip->shutdown)) {
758 err = -EIO;
759 goto error;
760 }
761 err = snd_usb_autoresume(chip);
762 if (err < 0)
763 goto error;
764 return 0;
765
766 error:
767 if (atomic_dec_and_test(&chip->usage_count))
768 wake_up(&chip->shutdown_wait);
769 return err;
770}
771
772/* autosuspend and unlock the shutdown */
773void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
774{
775 snd_usb_autosuspend(chip);
776 if (atomic_dec_and_test(&chip->usage_count))
777 wake_up(&chip->shutdown_wait);
778}
779
780#ifdef CONFIG_PM
781
782int snd_usb_autoresume(struct snd_usb_audio *chip)
783{
784 if (atomic_read(&chip->shutdown))
785 return -EIO;
786 if (atomic_inc_return(&chip->active) == 1)
787 return usb_autopm_get_interface(chip->pm_intf);
788 return 0;
789}
790
791void snd_usb_autosuspend(struct snd_usb_audio *chip)
792{
793 if (atomic_read(&chip->shutdown))
794 return;
795 if (atomic_dec_and_test(&chip->active))
796 usb_autopm_put_interface(chip->pm_intf);
797}
798
799static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
800{
801 struct snd_usb_audio *chip = usb_get_intfdata(intf);
802 struct snd_usb_stream *as;
803 struct usb_mixer_interface *mixer;
804 struct list_head *p;
805
806 if (chip == (void *)-1L)
807 return 0;
808
809 chip->autosuspended = !!PMSG_IS_AUTO(message);
810 if (!chip->autosuspended)
811 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
812 if (!chip->num_suspended_intf++) {
813 list_for_each_entry(as, &chip->pcm_list, list) {
814 snd_usb_pcm_suspend(as);
815 as->substream[0].need_setup_ep =
816 as->substream[1].need_setup_ep = true;
817 }
818 list_for_each(p, &chip->midi_list)
819 snd_usbmidi_suspend(p);
820 list_for_each_entry(mixer, &chip->mixer_list, list)
821 snd_usb_mixer_suspend(mixer);
822 }
823
824 return 0;
825}
826
827static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume)
828{
829 struct snd_usb_audio *chip = usb_get_intfdata(intf);
830 struct snd_usb_stream *as;
831 struct usb_mixer_interface *mixer;
832 struct list_head *p;
833 int err = 0;
834
835 if (chip == (void *)-1L)
836 return 0;
837 if (--chip->num_suspended_intf)
838 return 0;
839
840 atomic_inc(&chip->active); /* avoid autopm */
841
842 list_for_each_entry(as, &chip->pcm_list, list) {
843 err = snd_usb_pcm_resume(as);
844 if (err < 0)
845 goto err_out;
846 }
847
848 /*
849 * ALSA leaves material resumption to user space
850 * we just notify and restart the mixers
851 */
852 list_for_each_entry(mixer, &chip->mixer_list, list) {
853 err = snd_usb_mixer_resume(mixer, reset_resume);
854 if (err < 0)
855 goto err_out;
856 }
857
858 list_for_each(p, &chip->midi_list) {
859 snd_usbmidi_resume(p);
860 }
861
862 if (!chip->autosuspended)
863 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
864 chip->autosuspended = 0;
865
866err_out:
867 atomic_dec(&chip->active); /* allow autopm after this point */
868 return err;
869}
870
871static int usb_audio_resume(struct usb_interface *intf)
872{
873 return __usb_audio_resume(intf, false);
874}
875
876static int usb_audio_reset_resume(struct usb_interface *intf)
877{
878 return __usb_audio_resume(intf, true);
879}
880#else
881#define usb_audio_suspend NULL
882#define usb_audio_resume NULL
883#define usb_audio_reset_resume NULL
884#endif /* CONFIG_PM */
885
886static const struct usb_device_id usb_audio_ids [] = {
887#include "quirks-table.h"
888 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
889 .bInterfaceClass = USB_CLASS_AUDIO,
890 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
891 { } /* Terminating entry */
892};
893MODULE_DEVICE_TABLE(usb, usb_audio_ids);
894
895/*
896 * entry point for linux usb interface
897 */
898
899static struct usb_driver usb_audio_driver = {
900 .name = "snd-usb-audio",
901 .probe = usb_audio_probe,
902 .disconnect = usb_audio_disconnect,
903 .suspend = usb_audio_suspend,
904 .resume = usb_audio_resume,
905 .reset_resume = usb_audio_reset_resume,
906 .id_table = usb_audio_ids,
907 .supports_autosuspend = 1,
908};
909
910module_usb_driver(usb_audio_driver);