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ALSA: usb-audio: Refcount multiple accesses on the single clock
[linux-2.6-block.git] / sound / usb / card.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
e5779998
DM		 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 *
9a2fe9b8 11 * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
e5779998 12 *
e5779998
DM		 13 * NOTES:
14 *
e5779998
DM		 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>
3ffc1222 28#include <linux/ctype.h>
e5779998
DM		 29#include <linux/usb.h>
30#include <linux/moduleparam.h>
31#include <linux/mutex.h>
32#include <linux/usb/audio.h>
7e847894 33#include <linux/usb/audio-v2.h>
9a2fe9b8 34#include <linux/usb/audio-v3.h>
da155d5b 35#include <linux/module.h>
e5779998 36
9e38658f 37#include <sound/control.h>
e5779998
DM		 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"
f0b5e634 47#include "mixer.h"
e5779998
DM		 48#include "proc.h"
49#include "quirks.h"
50#include "endpoint.h"
51#include "helper.h"
e5779998 52#include "pcm.h"
e5779998 53#include "format.h"
88a8516a 54#include "power.h"
e8e8babf 55#include "stream.h"
66354f18 56#include "media.h"
e5779998
DM		 57
58MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
59MODULE_DESCRIPTION("USB Audio");
60MODULE_LICENSE("GPL");
e5779998
DM		 61
62static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
63static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
a67ff6a5 64static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
e5779998
DM		 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 };
e5779998 68static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
a67ff6a5 69static bool ignore_ctl_error;
ef02e29b 70static bool autoclock = true;
4801bee7 71static bool lowlatency = true;
e2703363 72static char *quirk_alias[SNDRV_CARDS];
b70038ef 73static char *delayed_register[SNDRV_CARDS];
62abd092 74static bool implicit_fb[SNDRV_CARDS];
5b517854 75static unsigned int quirk_flags[SNDRV_CARDS];
e5779998 76
f274baa4 77bool snd_usb_use_vmalloc = true;
f35ef592 78bool snd_usb_skip_validation;
f274baa4 79
e5779998
DM		 80module_param_array(index, int, NULL, 0444);
81MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
82module_param_array(id, charp, NULL, 0444);
83MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
84module_param_array(enable, bool, NULL, 0444);
85MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
86module_param_array(vid, int, NULL, 0444);
87MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
88module_param_array(pid, int, NULL, 0444);
89MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
e5779998
DM		 90module_param_array(device_setup, int, NULL, 0444);
91MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
92module_param(ignore_ctl_error, bool, 0444);
93MODULE_PARM_DESC(ignore_ctl_error,
94 "Ignore errors from USB controller for mixer interfaces.");
ef02e29b
EZ		 95module_param(autoclock, bool, 0444);
96MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
4801bee7
TI		 97module_param(lowlatency, bool, 0444);
98MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes).");
e2703363
TI		 99module_param_array(quirk_alias, charp, NULL, 0444);
100MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
b70038ef
TI		 101module_param_array(delayed_register, charp, NULL, 0444);
102MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
62abd092
TI		 103module_param_array(implicit_fb, bool, NULL, 0444);
104MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode.");
5b517854
TI		 105module_param_array(quirk_flags, uint, NULL, 0444);
106MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags.");
f274baa4
TI		 107module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
108MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
f35ef592
TI		 109module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
110MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
e5779998
DM		 111
112/*
113 * we keep the snd_usb_audio_t instances by ourselves for merging
114 * the all interfaces on the same card as one sound device.
115 */
116
117static DEFINE_MUTEX(register_mutex);
118static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
119static struct usb_driver usb_audio_driver;
120
121/*
122 * disconnect streams
4c8c3a4f 123 * called from usb_audio_disconnect()
e5779998 124 */
a6cece9d 125static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
e5779998
DM		 126{
127 int idx;
e5779998
DM		 128 struct snd_usb_substream *subs;
129
e5779998
DM		 130 for (idx = 0; idx < 2; idx++) {
131 subs = &as->substream[idx];
132 if (!subs->num_formats)
76195fb0 133 continue;
edcd3633
DM		 134 subs->data_endpoint = NULL;
135 subs->sync_endpoint = NULL;
e5779998
DM		 136 }
137}
138
139static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
140{
141 struct usb_device *dev = chip->dev;
142 struct usb_host_interface *alts;
143 struct usb_interface_descriptor *altsd;
144 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
145
146 if (!iface) {
0ba41d91
TI		 147 dev_err(&dev->dev, "%u:%d : does not exist\n",
148 ctrlif, interface);
e5779998
DM		 149 return -EINVAL;
150 }
151
342cda29
CL		 152 alts = &iface->altsetting[0];
153 altsd = get_iface_desc(alts);
154
155 /*
156 * Android with both accessory and audio interfaces enabled gets the
157 * interface numbers wrong.
158 */
159 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
160 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
161 interface == 0 &&
162 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
163 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
164 interface = 2;
165 iface = usb_ifnum_to_if(dev, interface);
166 if (!iface)
167 return -EINVAL;
168 alts = &iface->altsetting[0];
169 altsd = get_iface_desc(alts);
170 }
171
e5779998 172 if (usb_interface_claimed(iface)) {
0ba41d91
TI		 173 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
174 ctrlif, interface);
e5779998
DM		 175 return -EINVAL;
176 }
177
e5779998
DM		 178 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
179 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
180 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
79289e24
TI		 181 int err = __snd_usbmidi_create(chip->card, iface,
182 &chip->midi_list, NULL,
183 chip->usb_id);
e5779998 184 if (err < 0) {
0ba41d91
TI		 185 dev_err(&dev->dev,
186 "%u:%d: cannot create sequencer device\n",
187 ctrlif, interface);
e5779998
DM		 188 return -EINVAL;
189 }
5fb45414
TI		 190 return usb_driver_claim_interface(&usb_audio_driver, iface,
191 USB_AUDIO_IFACE_UNUSED);
e5779998
DM		 192 }
193
194 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
195 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
196 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
0ba41d91
TI		 197 dev_dbg(&dev->dev,
198 "%u:%d: skipping non-supported interface %d\n",
199 ctrlif, interface, altsd->bInterfaceClass);
e5779998
DM		 200 /* skip non-supported classes */
201 return -EINVAL;
202 }
203
204 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
0ba41d91 205 dev_err(&dev->dev, "low speed audio streaming not supported\n");
e5779998
DM		 206 return -EINVAL;
207 }
208
e8e8babf 209 if (! snd_usb_parse_audio_interface(chip, interface)) {
e5779998 210 usb_set_interface(dev, interface, 0); /* reset the current interface */
5fb45414
TI		 211 return usb_driver_claim_interface(&usb_audio_driver, iface,
212 USB_AUDIO_IFACE_UNUSED);
e5779998
DM		 213 }
214
215 return 0;
216}
217
218/*
219 * parse audio control descriptor and create pcm/midi streams
220 */
221static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
222{
223 struct usb_device *dev = chip->dev;
224 struct usb_host_interface *host_iface;
225 struct usb_interface_descriptor *altsd;
e5779998
DM		 226 int i, protocol;
227
228 /* find audiocontrol interface */
229 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
e5779998
DM		 230 altsd = get_iface_desc(host_iface);
231 protocol = altsd->bInterfaceProtocol;
232
e5779998 233 switch (protocol) {
a2acad82 234 default:
0ba41d91
TI		 235 dev_warn(&dev->dev,
236 "unknown interface protocol %#02x, assuming v1\n",
237 protocol);
c0dbbdad 238 fallthrough;
a2acad82 239
e5779998 240 case UAC_VERSION_1: {
3763f618
JS		 241 struct uac1_ac_header_descriptor *h1;
242 int rest_bytes;
243
244 h1 = snd_usb_find_csint_desc(host_iface->extra,
245 host_iface->extralen,
246 NULL, UAC_HEADER);
3e96d728 247 if (!h1 || h1->bLength < sizeof(*h1)) {
3763f618
JS		 248 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
249 return -EINVAL;
250 }
251
252 rest_bytes = (void *)(host_iface->extra +
253 host_iface->extralen) - (void *)h1;
254
255 /* just to be sure -- this shouldn't hit at all */
256 if (rest_bytes <= 0) {
257 dev_err(&dev->dev, "invalid control header\n");
258 return -EINVAL;
259 }
e5779998 260
bfc81a8b
TI		 261 if (rest_bytes < sizeof(*h1)) {
262 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
263 return -EINVAL;
264 }
265
e5779998 266 if (!h1->bInCollection) {
0ba41d91 267 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
e5779998
DM		 268 return -EINVAL;
269 }
270
bfc81a8b
TI		 271 if (rest_bytes < h1->bLength) {
272 dev_err(&dev->dev, "invalid buffer length (v1)\n");
273 return -EINVAL;
274 }
275
e5779998 276 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
0ba41d91 277 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
e5779998
DM		 278 return -EINVAL;
279 }
280
281 for (i = 0; i < h1->bInCollection; i++)
282 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
283
284 break;
285 }
286
9a2fe9b8
RB		 287 case UAC_VERSION_2:
288 case UAC_VERSION_3: {
e5779998
DM		 289 struct usb_interface_assoc_descriptor *assoc =
290 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
291
281a6ac0
CL		 292 if (!assoc) {
293 /*
294 * Firmware writers cannot count to three. So to find
295 * the IAD on the NuForce UDH-100, also check the next
296 * interface.
297 */
298 struct usb_interface *iface =
299 usb_ifnum_to_if(dev, ctrlif + 1);
300 if (iface &&
301 iface->intf_assoc &&
302 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
303 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
304 assoc = iface->intf_assoc;
305 }
306
e5779998 307 if (!assoc) {
9a2fe9b8 308 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
e5779998
DM		 309 return -EINVAL;
310 }
311
17156f23
RB		 312 if (protocol == UAC_VERSION_3) {
313 int badd = assoc->bFunctionSubClass;
314
315 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
316 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
317 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
318 dev_err(&dev->dev,
319 "Unsupported UAC3 BADD profile\n");
320 return -EINVAL;
321 }
322
323 chip->badd_profile = badd;
324 }
325
e5779998
DM		 326 for (i = 0; i < assoc->bInterfaceCount; i++) {
327 int intf = assoc->bFirstInterface + i;
328
329 if (intf != ctrlif)
330 snd_usb_create_stream(chip, ctrlif, intf);
331 }
332
333 break;
334 }
e5779998
DM		 335 }
336
337 return 0;
338}
339
5436f59b
TI		 340/*
341 * Profile name preset table
342 */
343struct usb_audio_device_name {
344 u32 id;
345 const char *vendor_name;
346 const char *product_name;
347 const char *profile_name; /* override card->longname */
348};
349
350#define PROFILE_NAME(vid, pid, vendor, product, profile) \
351 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
352 .product_name = (product), .profile_name = (profile) }
353#define DEVICE_NAME(vid, pid, vendor, product) \
354 PROFILE_NAME(vid, pid, vendor, product, NULL)
355
356/* vendor/product and profile name presets, sorted in device id order */
357static const struct usb_audio_device_name usb_audio_names[] = {
358 /* HP Thunderbolt Dock Audio Headset */
359 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
360 "HP-Thunderbolt-Dock-Audio-Headset"),
361 /* HP Thunderbolt Dock Audio Module */
362 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
363 "HP-Thunderbolt-Dock-Audio-Module"),
364
365 /* Two entries for Gigabyte TRX40 Aorus Master:
366 * TRX40 Aorus Master has two USB-audio devices, one for the front
367 * headphone with ESS SABRE9218 DAC chip, while another for the rest
368 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
369 * Here we provide two distinct names for making UCM profiles easier.
370 */
371 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
372 "Gigabyte-Aorus-Master-Front-Headphone"),
373 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
374 "Gigabyte-Aorus-Master-Main-Audio"),
375
376 /* Gigabyte TRX40 Aorus Pro WiFi */
377 PROFILE_NAME(0x0414, 0xa002,
378 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
379
380 /* Creative/E-Mu devices */
381 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
382 /* Creative/Toshiba Multimedia Center SB-0500 */
383 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
384
385 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
386
af158a7f
TI		 387 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
388 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
389
e5633b95
KHF		 390 /* ASUS ROG Strix */
391 PROFILE_NAME(0x0b05, 0x1917,
392 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
525d9c57
TI		 393 /* ASUS PRIME TRX40 PRO-S */
394 PROFILE_NAME(0x0b05, 0x1918,
395 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
e5633b95 396
5436f59b
TI		 397 /* Dell WD15 Dock */
398 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
399 /* Dell WD19 Dock */
400 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
401
402 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
403
404 /*
405 * The original product_name is "USB Sound Device", however this name
406 * is also used by the CM106 based cards, so make it unique.
407 */
408 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
409 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
410
411 /* MSI TRX40 Creator */
412 PROFILE_NAME(0x0db0, 0x0d64,
413 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
414 /* MSI TRX40 */
415 PROFILE_NAME(0x0db0, 0x543d,
416 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
417
af158a7f
TI		 418 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
419
5436f59b
TI		 420 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
421 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
422 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
423
424 /* aka. Serato Scratch Live DJ Box */
425 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
426
427 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
428 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
429 "Lenovo-ThinkStation-P620-Rear"),
430 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
431 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
432 "Lenovo-ThinkStation-P620-Main"),
433
434 /* Asrock TRX40 Creator */
435 PROFILE_NAME(0x26ce, 0x0a01,
436 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
437
af158a7f
TI		 438 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
439 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
440 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
441 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
442 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
443 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
444 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
445 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
446 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
447 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
448 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
449 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
450 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
451 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
452 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
453
5436f59b
TI		 454 { } /* terminator */
455};
456
457static const struct usb_audio_device_name *
458lookup_device_name(u32 id)
459{
460 static const struct usb_audio_device_name *p;
461
462 for (p = usb_audio_names; p->id; p++)
463 if (p->id == id)
464 return p;
465 return NULL;
466}
467
e5779998
DM		 468/*
469 * free the chip instance
470 *
471 * here we have to do not much, since pcm and controls are already freed
472 *
473 */
474
011ae2bf 475static void snd_usb_audio_free(struct snd_card *card)
e5779998 476{
011ae2bf 477 struct snd_usb_audio *chip = card->private_data;
92a586bd 478
00272c61 479 snd_usb_endpoint_free_all(chip);
92a586bd 480
596580d0 481 mutex_destroy(&chip->mutex);
6ff1a253
TI		 482 if (!atomic_read(&chip->shutdown))
483 dev_set_drvdata(&chip->dev->dev, NULL);
e5779998
DM		 484}
485
07eca5fc
TI		 486static void usb_audio_make_shortname(struct usb_device *dev,
487 struct snd_usb_audio *chip,
488 const struct snd_usb_audio_quirk *quirk)
489{
490 struct snd_card *card = chip->card;
5436f59b
TI		 491 const struct usb_audio_device_name *preset;
492 const char *s = NULL;
493
494 preset = lookup_device_name(chip->usb_id);
495 if (preset && preset->product_name)
496 s = preset->product_name;
497 else if (quirk && quirk->product_name)
498 s = quirk->product_name;
499 if (s && *s) {
75b1a8f9 500 strscpy(card->shortname, s, sizeof(card->shortname));
07eca5fc
TI		 501 return;
502 }
503
504 /* retrieve the device string as shortname */
505 if (!dev->descriptor.iProduct ||
506 usb_string(dev, dev->descriptor.iProduct,
507 card->shortname, sizeof(card->shortname)) <= 0) {
508 /* no name available from anywhere, so use ID */
509 sprintf(card->shortname, "USB Device %#04x:%#04x",
510 USB_ID_VENDOR(chip->usb_id),
511 USB_ID_PRODUCT(chip->usb_id));
512 }
513
514 strim(card->shortname);
515}
516
517static void usb_audio_make_longname(struct usb_device *dev,
518 struct snd_usb_audio *chip,
519 const struct snd_usb_audio_quirk *quirk)
520{
521 struct snd_card *card = chip->card;
5436f59b
TI		 522 const struct usb_audio_device_name *preset;
523 const char *s = NULL;
07eca5fc
TI		 524 int len;
525
5436f59b
TI		 526 preset = lookup_device_name(chip->usb_id);
527
07eca5fc 528 /* shortcut - if any pre-defined string is given, use it */
5436f59b
TI		 529 if (preset && preset->profile_name)
530 s = preset->profile_name;
531 if (s && *s) {
75b1a8f9 532 strscpy(card->longname, s, sizeof(card->longname));
07eca5fc
TI		 533 return;
534 }
535
5436f59b
TI		 536 if (preset && preset->vendor_name)
537 s = preset->vendor_name;
538 else if (quirk && quirk->vendor_name)
539 s = quirk->vendor_name;
42ef170d 540 *card->longname = 0;
5436f59b 541 if (s && *s) {
42ef170d 542 strscpy(card->longname, s, sizeof(card->longname));
07eca5fc
TI		 543 } else {
544 /* retrieve the vendor and device strings as longname */
545 if (dev->descriptor.iManufacturer)
42ef170d
TI		 546 usb_string(dev, dev->descriptor.iManufacturer,
547 card->longname, sizeof(card->longname));
07eca5fc
TI		 548 /* we don't really care if there isn't any vendor string */
549 }
42ef170d 550 if (*card->longname) {
07eca5fc
TI		 551 strim(card->longname);
552 if (*card->longname)
553 strlcat(card->longname, " ", sizeof(card->longname));
554 }
555
556 strlcat(card->longname, card->shortname, sizeof(card->longname));
557
558 len = strlcat(card->longname, " at ", sizeof(card->longname));
559
560 if (len < sizeof(card->longname))
561 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
562
563 switch (snd_usb_get_speed(dev)) {
564 case USB_SPEED_LOW:
565 strlcat(card->longname, ", low speed", sizeof(card->longname));
566 break;
567 case USB_SPEED_FULL:
568 strlcat(card->longname, ", full speed", sizeof(card->longname));
569 break;
570 case USB_SPEED_HIGH:
571 strlcat(card->longname, ", high speed", sizeof(card->longname));
572 break;
573 case USB_SPEED_SUPER:
574 strlcat(card->longname, ", super speed", sizeof(card->longname));
575 break;
576 case USB_SPEED_SUPER_PLUS:
577 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
578 break;
579 default:
580 break;
581 }
582}
583
e5779998
DM		 584/*
585 * create a chip instance and set its names.
586 */
874b8d42
TI		 587static int snd_usb_audio_create(struct usb_interface *intf,
588 struct usb_device *dev, int idx,
e5779998 589 const struct snd_usb_audio_quirk *quirk,
03a1f48e 590 unsigned int usb_id,
e5779998
DM		 591 struct snd_usb_audio **rchip)
592{
593 struct snd_card *card;
594 struct snd_usb_audio *chip;
07eca5fc 595 int err;
e5779998 596 char component[14];
e5779998
DM		 597
598 *rchip = NULL;
599
4f4e8f69
PZ		 600 switch (snd_usb_get_speed(dev)) {
601 case USB_SPEED_LOW:
602 case USB_SPEED_FULL:
603 case USB_SPEED_HIGH:
df3774c5 604 case USB_SPEED_WIRELESS:
4f4e8f69 605 case USB_SPEED_SUPER:
748a1ccc 606 case USB_SPEED_SUPER_PLUS:
4f4e8f69
PZ		 607 break;
608 default:
0ba41d91 609 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
e5779998
DM		 610 return -ENXIO;
611 }
612
874b8d42 613 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
011ae2bf 614 sizeof(*chip), &card);
e5779998 615 if (err < 0) {
0ba41d91 616 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
e5779998
DM		 617 return err;
618 }
619
011ae2bf 620 chip = card->private_data;
596580d0 621 mutex_init(&chip->mutex);
47ab1545 622 init_waitqueue_head(&chip->shutdown_wait);
e5779998
DM		 623 chip->index = idx;
624 chip->dev = dev;
625 chip->card = card;
626 chip->setup = device_setup[idx];
62abd092 627 chip->generic_implicit_fb = implicit_fb[idx];
ef02e29b 628 chip->autoclock = autoclock;
4801bee7 629 chip->lowlatency = lowlatency;
a6da499b 630 atomic_set(&chip->active, 1); /* avoid autopm during probing */
47ab1545
TI		 631 atomic_set(&chip->usage_count, 0);
632 atomic_set(&chip->shutdown, 0);
e5779998 633
03a1f48e 634 chip->usb_id = usb_id;
e5779998 635 INIT_LIST_HEAD(&chip->pcm_list);
edcd3633 636 INIT_LIST_HEAD(&chip->ep_list);
00272c61 637 INIT_LIST_HEAD(&chip->iface_ref_list);
c11117b6 638 INIT_LIST_HEAD(&chip->clock_ref_list);
e5779998
DM		 639 INIT_LIST_HEAD(&chip->midi_list);
640 INIT_LIST_HEAD(&chip->mixer_list);
641
5b517854
TI		 642 if (quirk_flags[idx])
643 chip->quirk_flags = quirk_flags[idx];
644 else
645 snd_usb_init_quirk_flags(chip);
4d4dee0a 646
011ae2bf 647 card->private_free = snd_usb_audio_free;
e5779998
DM		 648
649 strcpy(card->driver, "USB-Audio");
650 sprintf(component, "USB%04x:%04x",
651 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
652 snd_component_add(card, component);
653
07eca5fc
TI		 654 usb_audio_make_shortname(dev, chip, quirk);
655 usb_audio_make_longname(dev, chip, quirk);
e5779998
DM		 656
657 snd_usb_audio_create_proc(chip);
658
659 *rchip = chip;
660 return 0;
661}
662
e2703363
TI		 663/* look for a matching quirk alias id */
664static bool get_alias_id(struct usb_device *dev, unsigned int *id)
665{
666 int i;
667 unsigned int src, dst;
668
669 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
670 if (!quirk_alias[i] ||
671 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
672 src != *id)
673 continue;
674 dev_info(&dev->dev,
675 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
676 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
677 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
678 *id = dst;
679 return true;
680 }
681
682 return false;
683}
684
b70038ef
TI		 685static bool check_delayed_register_option(struct snd_usb_audio *chip, int iface)
686{
687 int i;
688 unsigned int id, inum;
689
690 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
691 if (delayed_register[i] &&
692 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
693 id == chip->usb_id)
694 return inum != iface;
695 }
696
697 return false;
698}
699
8824ae2d 700static const struct usb_device_id usb_audio_ids[]; /* defined below */
e2703363
TI		 701
702/* look for the corresponding quirk */
703static const struct snd_usb_audio_quirk *
704get_alias_quirk(struct usb_device *dev, unsigned int id)
705{
706 const struct usb_device_id *p;
707
708 for (p = usb_audio_ids; p->match_flags; p++) {
709 /* FIXME: this checks only vendor:product pair in the list */
710 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
711 USB_DEVICE_ID_MATCH_DEVICE &&
712 p->idVendor == USB_ID_VENDOR(id) &&
713 p->idProduct == USB_ID_PRODUCT(id))
714 return (const struct snd_usb_audio_quirk *)p->driver_info;
715 }
716
717 return NULL;
718}
719
e5779998
DM		 720/*
721 * probe the active usb device
722 *
723 * note that this can be called multiple times per a device, when it
724 * includes multiple audio control interfaces.
725 *
726 * thus we check the usb device pointer and creates the card instance
727 * only at the first time. the successive calls of this function will
728 * append the pcm interface to the corresponding card.
729 */
4c8c3a4f
TI		 730static int usb_audio_probe(struct usb_interface *intf,
731 const struct usb_device_id *usb_id)
e5779998 732{
4c8c3a4f
TI		 733 struct usb_device *dev = interface_to_usbdev(intf);
734 const struct snd_usb_audio_quirk *quirk =
735 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
e5779998 736 struct snd_usb_audio *chip;
4c8c3a4f 737 int i, err;
e5779998
DM		 738 struct usb_host_interface *alts;
739 int ifnum;
740 u32 id;
741
742 alts = &intf->altsetting[0];
743 ifnum = get_iface_desc(alts)->bInterfaceNumber;
744 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
745 le16_to_cpu(dev->descriptor.idProduct));
e2703363
TI		 746 if (get_alias_id(dev, &id))
747 quirk = get_alias_quirk(dev, id);
e5779998 748 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
4c8c3a4f 749 return -ENXIO;
d7631453
TI		 750 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
751 return -ENODEV;
e5779998 752
79289e24 753 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
4c8c3a4f
TI		 754 if (err < 0)
755 return err;
e5779998
DM		 756
757 /*
758 * found a config. now register to ALSA
759 */
760
761 /* check whether it's already registered */
762 chip = NULL;
763 mutex_lock(&register_mutex);
764 for (i = 0; i < SNDRV_CARDS; i++) {
765 if (usb_chip[i] && usb_chip[i]->dev == dev) {
47ab1545 766 if (atomic_read(&usb_chip[i]->shutdown)) {
0ba41d91 767 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
4c8c3a4f 768 err = -EIO;
e5779998
DM		 769 goto __error;
770 }
771 chip = usb_chip[i];
a6da499b 772 atomic_inc(&chip->active); /* avoid autopm */
e5779998
DM		 773 break;
774 }
775 }
776 if (! chip) {
73ac9f5e
AT		 777 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
778 if (err < 0)
a3afa299 779 goto __error;
73ac9f5e 780
e5779998
DM		 781 /* it's a fresh one.
782 * now look for an empty slot and create a new card instance
783 */
784 for (i = 0; i < SNDRV_CARDS; i++)
108884e6 785 if (!usb_chip[i] &&
e5779998
DM		 786 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
787 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
108884e6
TN		 788 if (enable[i]) {
789 err = snd_usb_audio_create(intf, dev, i, quirk,
790 id, &chip);
791 if (err < 0)
792 goto __error;
108884e6
TN		 793 break;
794 } else if (vid[i] != -1 || pid[i] != -1) {
795 dev_info(&dev->dev,
796 "device (%04x:%04x) is disabled\n",
797 USB_ID_VENDOR(id),
798 USB_ID_PRODUCT(id));
799 err = -ENOENT;
e5779998 800 goto __error;
108884e6 801 }
e5779998
DM		 802 }
803 if (!chip) {
0ba41d91 804 dev_err(&dev->dev, "no available usb audio device\n");
4c8c3a4f 805 err = -ENODEV;
e5779998
DM		 806 goto __error;
807 }
808 }
88d8822d
TI		 809
810 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
811 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
812 err = -EINVAL;
813 goto __error;
814 }
815
76df5296 816 dev_set_drvdata(&dev->dev, chip);
e5779998 817
3c69dc91
TI		 818 if (ignore_ctl_error)
819 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
820
44e6fc64
TI		 821 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
822 usb_disable_autosuspend(interface_to_usbdev(intf));
823
7b6717e1
DM		 824 /*
825 * For devices with more than one control interface, we assume the
826 * first contains the audio controls. We might need a more specific
827 * check here in the future.
828 */
829 if (!chip->ctrl_intf)
830 chip->ctrl_intf = alts;
79f920fb 831
5875c2cb
DM		 832 err = 1; /* continue */
833 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
834 /* need some special handlings */
4c8c3a4f
TI		 835 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
836 if (err < 0)
5875c2cb
DM		 837 goto __error;
838 }
839
e5779998
DM		 840 if (err > 0) {
841 /* create normal USB audio interfaces */
4c8c3a4f
TI		 842 err = snd_usb_create_streams(chip, ifnum);
843 if (err < 0)
844 goto __error;
3c69dc91 845 err = snd_usb_create_mixer(chip, ifnum);
4c8c3a4f 846 if (err < 0)
e5779998 847 goto __error;
e5779998
DM		 848 }
849
a4aad563
TI		 850 if (chip->need_delayed_register) {
851 dev_info(&dev->dev,
852 "Found post-registration device assignment: %08x:%02x\n",
853 chip->usb_id, ifnum);
854 chip->need_delayed_register = false; /* clear again */
855 }
856
55f73261
CW		 857 /* we are allowed to call snd_card_register() many times, but first
858 * check to see if a device needs to skip it or do anything special
859 */
b70038ef
TI		 860 if (!snd_usb_registration_quirk(chip, ifnum) &&
861 !check_delayed_register_option(chip, ifnum)) {
55f73261
CW		 862 err = snd_card_register(chip->card);
863 if (err < 0)
864 goto __error;
865 }
e5779998 866
ce47d47e 867 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
66354f18
SK		 868 /* don't want to fail when snd_media_device_create() fails */
869 snd_media_device_create(chip, intf);
870 }
871
30dea071
PS		 872 if (quirk)
873 chip->quirk_type = quirk->type;
97991108 874
e5779998 875 usb_chip[chip->index] = chip;
88d8822d 876 chip->intf[chip->num_interfaces] = intf;
e5779998 877 chip->num_interfaces++;
4c8c3a4f 878 usb_set_intfdata(intf, chip);
a6da499b 879 atomic_dec(&chip->active);
e5779998 880 mutex_unlock(&register_mutex);
4c8c3a4f 881 return 0;
e5779998
DM		 882
883 __error:
61a6a108 884 if (chip) {
5f8cf712
HP		 885 /* chip->active is inside the chip->card object,
886 * decrement before memory is possibly returned.
887 */
888 atomic_dec(&chip->active);
61a6a108
TP		 889 if (!chip->num_interfaces)
890 snd_card_free(chip->card);
61a6a108 891 }
e5779998 892 mutex_unlock(&register_mutex);
4c8c3a4f 893 return err;
e5779998
DM		 894}
895
896/*
897 * we need to take care of counter, since disconnection can be called also
898 * many times as well as usb_audio_probe().
899 */
4c8c3a4f 900static void usb_audio_disconnect(struct usb_interface *intf)
e5779998 901{
4c8c3a4f 902 struct snd_usb_audio *chip = usb_get_intfdata(intf);
e5779998 903 struct snd_card *card;
92a586bd 904 struct list_head *p;
e5779998 905
5fb45414 906 if (chip == USB_AUDIO_IFACE_UNUSED)
e5779998
DM		 907 return;
908
e5779998 909 card = chip->card;
10e44239
TI		 910
911 mutex_lock(&register_mutex);
47ab1545 912 if (atomic_inc_return(&chip->shutdown) == 1) {
a6cece9d 913 struct snd_usb_stream *as;
92a586bd 914 struct snd_usb_endpoint *ep;
a6cece9d 915 struct usb_mixer_interface *mixer;
92a586bd 916
47ab1545
TI		 917 /* wait until all pending tasks done;
918 * they are protected by snd_usb_lock_shutdown()
919 */
920 wait_event(chip->shutdown_wait,
921 !atomic_read(&chip->usage_count));
e5779998
DM		 922 snd_card_disconnect(card);
923 /* release the pcm resources */
a6cece9d
TI		 924 list_for_each_entry(as, &chip->pcm_list, list) {
925 snd_usb_stream_disconnect(as);
e5779998 926 }
edcd3633 927 /* release the endpoint resources */
92a586bd
TI		 928 list_for_each_entry(ep, &chip->ep_list, list) {
929 snd_usb_endpoint_release(ep);
edcd3633 930 }
e5779998
DM		 931 /* release the midi resources */
932 list_for_each(p, &chip->midi_list) {
933 snd_usbmidi_disconnect(p);
934 }
66354f18
SK		 935 /*
936 * Nice to check quirk && quirk->shares_media_device and
937 * then call the snd_media_device_delete(). Don't have
938 * access to the quirk here. snd_media_device_delete()
939 * accesses mixer_list
940 */
941 snd_media_device_delete(chip);
942
e5779998 943 /* release mixer resources */
a6cece9d
TI		 944 list_for_each_entry(mixer, &chip->mixer_list, list) {
945 snd_usb_mixer_disconnect(mixer);
e5779998 946 }
0725dda2
TI		 947 }
948
44e6fc64 949 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
c5aa956e
PS		 950 usb_enable_autosuspend(interface_to_usbdev(intf));
951
0725dda2
TI		 952 chip->num_interfaces--;
953 if (chip->num_interfaces <= 0) {
e5779998
DM		 954 usb_chip[chip->index] = NULL;
955 mutex_unlock(&register_mutex);
956 snd_card_free_when_closed(card);
957 } else {
958 mutex_unlock(&register_mutex);
959 }
960}
961
47ab1545
TI		 962/* lock the shutdown (disconnect) task and autoresume */
963int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
88a8516a 964{
47ab1545 965 int err;
88a8516a 966
47ab1545
TI		 967 atomic_inc(&chip->usage_count);
968 if (atomic_read(&chip->shutdown)) {
969 err = -EIO;
970 goto error;
971 }
972 err = snd_usb_autoresume(chip);
973 if (err < 0)
974 goto error;
975 return 0;
88a8516a 976
47ab1545
TI		 977 error:
978 if (atomic_dec_and_test(&chip->usage_count))
979 wake_up(&chip->shutdown_wait);
88a8516a
ON		 980 return err;
981}
982
47ab1545
TI		 983/* autosuspend and unlock the shutdown */
984void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
985{
986 snd_usb_autosuspend(chip);
987 if (atomic_dec_and_test(&chip->usage_count))
988 wake_up(&chip->shutdown_wait);
989}
990
47ab1545
TI		 991int snd_usb_autoresume(struct snd_usb_audio *chip)
992{
88d8822d
TI		 993 int i, err;
994
47ab1545
TI		 995 if (atomic_read(&chip->shutdown))
996 return -EIO;
88d8822d
TI		 997 if (atomic_inc_return(&chip->active) != 1)
998 return 0;
999
1000 for (i = 0; i < chip->num_interfaces; i++) {
1001 err = usb_autopm_get_interface(chip->intf[i]);
1002 if (err < 0) {
1003 /* rollback */
1004 while (--i >= 0)
1005 usb_autopm_put_interface(chip->intf[i]);
1006 atomic_dec(&chip->active);
1007 return err;
1008 }
1009 }
47ab1545
TI		 1010 return 0;
1011}
1012
88a8516a
ON		 1013void snd_usb_autosuspend(struct snd_usb_audio *chip)
1014{
88d8822d
TI		 1015 int i;
1016
5c06d68b
TI		 1017 if (atomic_read(&chip->shutdown))
1018 return;
88d8822d
TI		 1019 if (!atomic_dec_and_test(&chip->active))
1020 return;
1021
1022 for (i = 0; i < chip->num_interfaces; i++)
1023 usb_autopm_put_interface(chip->intf[i]);
88a8516a
ON		 1024}
1025
e5779998
DM		 1026static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1027{
1028 struct snd_usb_audio *chip = usb_get_intfdata(intf);
e5779998 1029 struct snd_usb_stream *as;
bf6313a0 1030 struct snd_usb_endpoint *ep;
edf7de31 1031 struct usb_mixer_interface *mixer;
f7881e5e 1032 struct list_head *p;
e5779998 1033
5fb45414 1034 if (chip == USB_AUDIO_IFACE_UNUSED)
e5779998
DM		 1035 return 0;
1036
0662292a 1037 if (!chip->num_suspended_intf++) {
bf6313a0 1038 list_for_each_entry(as, &chip->pcm_list, list)
3f59aa11 1039 snd_usb_pcm_suspend(as);
bf6313a0
TI		 1040 list_for_each_entry(ep, &chip->ep_list, list)
1041 snd_usb_endpoint_suspend(ep);
0662292a
TI		 1042 list_for_each(p, &chip->midi_list)
1043 snd_usbmidi_suspend(p);
1c53e725
TI		 1044 list_for_each_entry(mixer, &chip->mixer_list, list)
1045 snd_usb_mixer_suspend(mixer);
0662292a 1046 }
88a8516a 1047
862b2509
TI		 1048 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1049 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1050 chip->system_suspend = chip->num_suspended_intf;
1051 }
1052
e5779998
DM		 1053 return 0;
1054}
1055
7b9cf903 1056static int usb_audio_resume(struct usb_interface *intf)
e5779998
DM		 1057{
1058 struct snd_usb_audio *chip = usb_get_intfdata(intf);
3f59aa11 1059 struct snd_usb_stream *as;
edf7de31 1060 struct usb_mixer_interface *mixer;
f7881e5e 1061 struct list_head *p;
88a8516a 1062 int err = 0;
e5779998 1063
5fb45414 1064 if (chip == USB_AUDIO_IFACE_UNUSED)
e5779998 1065 return 0;
1ee23fe0 1066
47ab1545 1067 atomic_inc(&chip->active); /* avoid autopm */
862b2509
TI		 1068 if (chip->num_suspended_intf > 1)
1069 goto out;
3f59aa11
JS		 1070
1071 list_for_each_entry(as, &chip->pcm_list, list) {
1072 err = snd_usb_pcm_resume(as);
1073 if (err < 0)
1074 goto err_out;
1075 }
1076
e5779998
DM		 1077 /*
1078 * ALSA leaves material resumption to user space
edf7de31 1079 * we just notify and restart the mixers
e5779998 1080 */
88a8516a 1081 list_for_each_entry(mixer, &chip->mixer_list, list) {
7b9cf903 1082 err = snd_usb_mixer_resume(mixer);
88a8516a
ON		 1083 if (err < 0)
1084 goto err_out;
1085 }
e5779998 1086
f7881e5e
AG		 1087 list_for_each(p, &chip->midi_list) {
1088 snd_usbmidi_resume(p);
1089 }
1090
862b2509
TI		 1091 out:
1092 if (chip->num_suspended_intf == chip->system_suspend) {
88a8516a 1093 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
862b2509
TI		 1094 chip->system_suspend = 0;
1095 }
1096 chip->num_suspended_intf--;
e5779998 1097
88a8516a 1098err_out:
47ab1545 1099 atomic_dec(&chip->active); /* allow autopm after this point */
88a8516a 1100 return err;
e5779998 1101}
e5779998 1102
8824ae2d 1103static const struct usb_device_id usb_audio_ids [] = {
e5779998
DM		 1104#include "quirks-table.h"
1105 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1106 .bInterfaceClass = USB_CLASS_AUDIO,
1107 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1108 { } /* Terminating entry */
1109};
f9d35435 1110MODULE_DEVICE_TABLE(usb, usb_audio_ids);
e5779998
DM		 1111
1112/*
1113 * entry point for linux usb interface
1114 */
1115
1116static struct usb_driver usb_audio_driver = {
1117 .name = "snd-usb-audio",
1118 .probe = usb_audio_probe,
1119 .disconnect = usb_audio_disconnect,
1120 .suspend = usb_audio_suspend,
1121 .resume = usb_audio_resume,
7b9cf903 1122 .reset_resume = usb_audio_resume,
e5779998 1123 .id_table = usb_audio_ids,
88a8516a 1124 .supports_autosuspend = 1,
e5779998
DM		 1125};
1126
6b5a7c66 1127module_usb_driver(usb_audio_driver);
Linux 6.x block layer and io_uring tree(s)