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Merge tag 'pci-v6.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
[linux-2.6-block.git] / sound / usb / card.c
... / ...
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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;
121static struct snd_usb_platform_ops *platform_ops;
122
123/*
124 * Register platform specific operations that will be notified on events
125 * which occur in USB SND. The platform driver can utilize this path to
126 * enable features, such as USB audio offloading, which allows for audio data
127 * to be queued by an audio DSP.
128 *
129 * Only one set of platform operations can be registered to USB SND. The
130 * platform register operation is protected by the register_mutex.
131 */
132int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops)
133{
134 guard(mutex)(&register_mutex);
135 if (platform_ops)
136 return -EEXIST;
137
138 platform_ops = ops;
139 return 0;
140}
141EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops);
142
143/*
144 * Unregisters the current set of platform operations. This allows for
145 * a new set to be registered if required.
146 *
147 * The platform unregister operation is protected by the register_mutex.
148 */
149int snd_usb_unregister_platform_ops(void)
150{
151 guard(mutex)(&register_mutex);
152 platform_ops = NULL;
153
154 return 0;
155}
156EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops);
157
158/*
159 * in case the platform driver was not ready at the time of USB SND
160 * device connect, expose an API to discover all connected USB devices
161 * so it can populate any dependent resources/structures.
162 */
163void snd_usb_rediscover_devices(void)
164{
165 int i;
166
167 guard(mutex)(&register_mutex);
168
169 if (!platform_ops || !platform_ops->connect_cb)
170 return;
171
172 for (i = 0; i < SNDRV_CARDS; i++) {
173 if (usb_chip[i])
174 platform_ops->connect_cb(usb_chip[i]);
175 }
176}
177EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices);
178
179/*
180 * Checks to see if requested audio profile, i.e sample rate, # of
181 * channels, etc... is supported by the substream associated to the
182 * USB audio device.
183 */
184struct snd_usb_stream *
185snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params,
186 int direction)
187{
188 struct snd_usb_audio *chip;
189 struct snd_usb_substream *subs;
190 struct snd_usb_stream *as;
191
192 /*
193 * Register mutex is held when populating and clearing usb_chip
194 * array.
195 */
196 guard(mutex)(&register_mutex);
197 chip = usb_chip[card_idx];
198
199 if (chip && enable[card_idx]) {
200 list_for_each_entry(as, &chip->pcm_list, list) {
201 subs = &as->substream[direction];
202 if (snd_usb_find_substream_format(subs, params))
203 return as;
204 }
205 }
206
207 return NULL;
208}
209EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream);
210
211/*
212 * disconnect streams
213 * called from usb_audio_disconnect()
214 */
215static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
216{
217 int idx;
218 struct snd_usb_substream *subs;
219
220 for (idx = 0; idx < 2; idx++) {
221 subs = &as->substream[idx];
222 if (!subs->num_formats)
223 continue;
224 subs->data_endpoint = NULL;
225 subs->sync_endpoint = NULL;
226 }
227}
228
229static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
230{
231 struct usb_device *dev = chip->dev;
232 struct usb_host_interface *alts;
233 struct usb_interface_descriptor *altsd;
234 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
235
236 if (!iface) {
237 dev_err(&dev->dev, "%u:%d : does not exist\n",
238 ctrlif, interface);
239 return -EINVAL;
240 }
241
242 alts = &iface->altsetting[0];
243 altsd = get_iface_desc(alts);
244
245 /*
246 * Android with both accessory and audio interfaces enabled gets the
247 * interface numbers wrong.
248 */
249 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
250 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
251 interface == 0 &&
252 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
253 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
254 interface = 2;
255 iface = usb_ifnum_to_if(dev, interface);
256 if (!iface)
257 return -EINVAL;
258 alts = &iface->altsetting[0];
259 altsd = get_iface_desc(alts);
260 }
261
262 if (usb_interface_claimed(iface)) {
263 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
264 ctrlif, interface);
265 return -EINVAL;
266 }
267
268 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
269 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
270 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
271 int err = snd_usb_midi_v2_create(chip, iface, NULL,
272 chip->usb_id);
273 if (err < 0) {
274 dev_err(&dev->dev,
275 "%u:%d: cannot create sequencer device\n",
276 ctrlif, interface);
277 return -EINVAL;
278 }
279 return usb_driver_claim_interface(&usb_audio_driver, iface,
280 USB_AUDIO_IFACE_UNUSED);
281 }
282
283 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
284 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
285 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
286 dev_dbg(&dev->dev,
287 "%u:%d: skipping non-supported interface %d\n",
288 ctrlif, interface, altsd->bInterfaceClass);
289 /* skip non-supported classes */
290 return -EINVAL;
291 }
292
293 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
294 dev_err(&dev->dev, "low speed audio streaming not supported\n");
295 return -EINVAL;
296 }
297
298 snd_usb_add_ctrl_interface_link(chip, interface, ctrlif);
299
300 if (! snd_usb_parse_audio_interface(chip, interface)) {
301 usb_set_interface(dev, interface, 0); /* reset the current interface */
302 return usb_driver_claim_interface(&usb_audio_driver, iface,
303 USB_AUDIO_IFACE_UNUSED);
304 }
305
306 return 0;
307}
308
309/*
310 * parse audio control descriptor and create pcm/midi streams
311 */
312static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
313{
314 struct usb_device *dev = chip->dev;
315 struct usb_host_interface *host_iface;
316 struct usb_interface_descriptor *altsd;
317 int i, protocol;
318
319 /* find audiocontrol interface */
320 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
321 altsd = get_iface_desc(host_iface);
322 protocol = altsd->bInterfaceProtocol;
323
324 switch (protocol) {
325 default:
326 dev_warn(&dev->dev,
327 "unknown interface protocol %#02x, assuming v1\n",
328 protocol);
329 fallthrough;
330
331 case UAC_VERSION_1: {
332 struct uac1_ac_header_descriptor *h1;
333 int rest_bytes;
334
335 h1 = snd_usb_find_csint_desc(host_iface->extra,
336 host_iface->extralen,
337 NULL, UAC_HEADER);
338 if (!h1 || h1->bLength < sizeof(*h1)) {
339 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
340 return -EINVAL;
341 }
342
343 rest_bytes = (void *)(host_iface->extra +
344 host_iface->extralen) - (void *)h1;
345
346 /* just to be sure -- this shouldn't hit at all */
347 if (rest_bytes <= 0) {
348 dev_err(&dev->dev, "invalid control header\n");
349 return -EINVAL;
350 }
351
352 if (rest_bytes < sizeof(*h1)) {
353 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
354 return -EINVAL;
355 }
356
357 if (!h1->bInCollection) {
358 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
359 return -EINVAL;
360 }
361
362 if (rest_bytes < h1->bLength) {
363 dev_err(&dev->dev, "invalid buffer length (v1)\n");
364 return -EINVAL;
365 }
366
367 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
368 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
369 return -EINVAL;
370 }
371
372 for (i = 0; i < h1->bInCollection; i++)
373 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
374
375 break;
376 }
377
378 case UAC_VERSION_2:
379 case UAC_VERSION_3: {
380 struct usb_interface_assoc_descriptor *assoc =
381 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
382
383 if (!assoc) {
384 /*
385 * Firmware writers cannot count to three. So to find
386 * the IAD on the NuForce UDH-100, also check the next
387 * interface.
388 */
389 struct usb_interface *iface =
390 usb_ifnum_to_if(dev, ctrlif + 1);
391 if (iface &&
392 iface->intf_assoc &&
393 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
394 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
395 assoc = iface->intf_assoc;
396 }
397
398 if (!assoc) {
399 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
400 return -EINVAL;
401 }
402
403 if (protocol == UAC_VERSION_3) {
404 int badd = assoc->bFunctionSubClass;
405
406 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
407 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
408 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
409 dev_err(&dev->dev,
410 "Unsupported UAC3 BADD profile\n");
411 return -EINVAL;
412 }
413
414 chip->badd_profile = badd;
415 }
416
417 for (i = 0; i < assoc->bInterfaceCount; i++) {
418 int intf = assoc->bFirstInterface + i;
419
420 if (intf != ctrlif)
421 snd_usb_create_stream(chip, ctrlif, intf);
422 }
423
424 break;
425 }
426 }
427
428 return 0;
429}
430
431/*
432 * Profile name preset table
433 */
434struct usb_audio_device_name {
435 u32 id;
436 const char *vendor_name;
437 const char *product_name;
438 const char *profile_name; /* override card->longname */
439};
440
441#define PROFILE_NAME(vid, pid, vendor, product, profile) \
442 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
443 .product_name = (product), .profile_name = (profile) }
444#define DEVICE_NAME(vid, pid, vendor, product) \
445 PROFILE_NAME(vid, pid, vendor, product, NULL)
446
447/* vendor/product and profile name presets, sorted in device id order */
448static const struct usb_audio_device_name usb_audio_names[] = {
449 /* HP Thunderbolt Dock Audio Headset */
450 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
451 "HP-Thunderbolt-Dock-Audio-Headset"),
452 /* HP Thunderbolt Dock Audio Module */
453 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
454 "HP-Thunderbolt-Dock-Audio-Module"),
455
456 /* Two entries for Gigabyte TRX40 Aorus Master:
457 * TRX40 Aorus Master has two USB-audio devices, one for the front
458 * headphone with ESS SABRE9218 DAC chip, while another for the rest
459 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
460 * Here we provide two distinct names for making UCM profiles easier.
461 */
462 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
463 "Gigabyte-Aorus-Master-Front-Headphone"),
464 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
465 "Gigabyte-Aorus-Master-Main-Audio"),
466
467 /* Gigabyte TRX40 Aorus Pro WiFi */
468 PROFILE_NAME(0x0414, 0xa002,
469 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
470
471 /* Creative/E-Mu devices */
472 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
473 /* Creative/Toshiba Multimedia Center SB-0500 */
474 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
475
476 /* Logitech Audio Devices */
477 DEVICE_NAME(0x046d, 0x0867, "Logitech, Inc.", "Logi-MeetUp"),
478 DEVICE_NAME(0x046d, 0x0874, "Logitech, Inc.", "Logi-Tap-Audio"),
479 DEVICE_NAME(0x046d, 0x087c, "Logitech, Inc.", "Logi-Huddle"),
480 DEVICE_NAME(0x046d, 0x0898, "Logitech, Inc.", "Logi-RB-Audio"),
481 DEVICE_NAME(0x046d, 0x08d2, "Logitech, Inc.", "Logi-RBM-Audio"),
482 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
483
484 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
485 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
486
487 /* ASUS ROG Zenith II: this machine has also two devices, one for
488 * the front headphone and another for the rest
489 */
490 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
491 "Zenith-II-Front-Headphone"),
492 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
493 "Zenith-II-Main-Audio"),
494
495 /* ASUS ROG Strix */
496 PROFILE_NAME(0x0b05, 0x1917,
497 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
498 /* ASUS PRIME TRX40 PRO-S */
499 PROFILE_NAME(0x0b05, 0x1918,
500 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
501
502 /* Dell WD15 Dock */
503 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
504 /* Dell WD19 Dock */
505 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
506
507 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
508
509 /*
510 * The original product_name is "USB Sound Device", however this name
511 * is also used by the CM106 based cards, so make it unique.
512 */
513 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
514 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
515
516 /* MSI TRX40 Creator */
517 PROFILE_NAME(0x0db0, 0x0d64,
518 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
519 /* MSI TRX40 */
520 PROFILE_NAME(0x0db0, 0x543d,
521 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
522
523 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
524
525 /* Dock/Stand for HP Engage Go */
526 PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock",
527 "HP-Engage-Go-Dock"),
528
529 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
530 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
531 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
532
533 /* aka. Serato Scratch Live DJ Box */
534 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
535
536 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
537 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
538 "Lenovo-ThinkStation-P620-Rear"),
539 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
540 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
541 "Lenovo-ThinkStation-P620-Main"),
542
543 /* Asrock TRX40 Creator */
544 PROFILE_NAME(0x26ce, 0x0a01,
545 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
546
547 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
548 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
549 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
550 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
551 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
552 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
553 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
554 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
555 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
556 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
557 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
558 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
559 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
560 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
561 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
562
563 { } /* terminator */
564};
565
566static const struct usb_audio_device_name *
567lookup_device_name(u32 id)
568{
569 static const struct usb_audio_device_name *p;
570
571 for (p = usb_audio_names; p->id; p++)
572 if (p->id == id)
573 return p;
574 return NULL;
575}
576
577/*
578 * free the chip instance
579 *
580 * here we have to do not much, since pcm and controls are already freed
581 *
582 */
583
584static void snd_usb_audio_free(struct snd_card *card)
585{
586 struct snd_usb_audio *chip = card->private_data;
587
588 snd_usb_endpoint_free_all(chip);
589 snd_usb_midi_v2_free_all(chip);
590
591 mutex_destroy(&chip->mutex);
592 if (!atomic_read(&chip->shutdown))
593 dev_set_drvdata(&chip->dev->dev, NULL);
594}
595
596static void usb_audio_make_shortname(struct usb_device *dev,
597 struct snd_usb_audio *chip,
598 const struct snd_usb_audio_quirk *quirk)
599{
600 struct snd_card *card = chip->card;
601 const struct usb_audio_device_name *preset;
602 const char *s = NULL;
603
604 preset = lookup_device_name(chip->usb_id);
605 if (preset && preset->product_name)
606 s = preset->product_name;
607 else if (quirk && quirk->product_name)
608 s = quirk->product_name;
609 if (s && *s) {
610 strscpy(card->shortname, s, sizeof(card->shortname));
611 return;
612 }
613
614 /* retrieve the device string as shortname */
615 if (!dev->descriptor.iProduct ||
616 usb_string(dev, dev->descriptor.iProduct,
617 card->shortname, sizeof(card->shortname)) <= 0) {
618 /* no name available from anywhere, so use ID */
619 sprintf(card->shortname, "USB Device %#04x:%#04x",
620 USB_ID_VENDOR(chip->usb_id),
621 USB_ID_PRODUCT(chip->usb_id));
622 }
623
624 strim(card->shortname);
625}
626
627static void usb_audio_make_longname(struct usb_device *dev,
628 struct snd_usb_audio *chip,
629 const struct snd_usb_audio_quirk *quirk)
630{
631 struct snd_card *card = chip->card;
632 const struct usb_audio_device_name *preset;
633 const char *s = NULL;
634 int len;
635
636 preset = lookup_device_name(chip->usb_id);
637
638 /* shortcut - if any pre-defined string is given, use it */
639 if (preset && preset->profile_name)
640 s = preset->profile_name;
641 if (s && *s) {
642 strscpy(card->longname, s, sizeof(card->longname));
643 return;
644 }
645
646 if (preset && preset->vendor_name)
647 s = preset->vendor_name;
648 else if (quirk && quirk->vendor_name)
649 s = quirk->vendor_name;
650 *card->longname = 0;
651 if (s && *s) {
652 strscpy(card->longname, s, sizeof(card->longname));
653 } else {
654 /* retrieve the vendor and device strings as longname */
655 if (dev->descriptor.iManufacturer)
656 usb_string(dev, dev->descriptor.iManufacturer,
657 card->longname, sizeof(card->longname));
658 /* we don't really care if there isn't any vendor string */
659 }
660 if (*card->longname) {
661 strim(card->longname);
662 if (*card->longname)
663 strlcat(card->longname, " ", sizeof(card->longname));
664 }
665
666 strlcat(card->longname, card->shortname, sizeof(card->longname));
667
668 len = strlcat(card->longname, " at ", sizeof(card->longname));
669
670 if (len < sizeof(card->longname))
671 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
672
673 switch (snd_usb_get_speed(dev)) {
674 case USB_SPEED_LOW:
675 strlcat(card->longname, ", low speed", sizeof(card->longname));
676 break;
677 case USB_SPEED_FULL:
678 strlcat(card->longname, ", full speed", sizeof(card->longname));
679 break;
680 case USB_SPEED_HIGH:
681 strlcat(card->longname, ", high speed", sizeof(card->longname));
682 break;
683 case USB_SPEED_SUPER:
684 strlcat(card->longname, ", super speed", sizeof(card->longname));
685 break;
686 case USB_SPEED_SUPER_PLUS:
687 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
688 break;
689 default:
690 break;
691 }
692}
693
694/*
695 * create a chip instance and set its names.
696 */
697static int snd_usb_audio_create(struct usb_interface *intf,
698 struct usb_device *dev, int idx,
699 const struct snd_usb_audio_quirk *quirk,
700 unsigned int usb_id,
701 struct snd_usb_audio **rchip)
702{
703 struct snd_card *card;
704 struct snd_usb_audio *chip;
705 int err;
706 char component[14];
707
708 *rchip = NULL;
709
710 switch (snd_usb_get_speed(dev)) {
711 case USB_SPEED_LOW:
712 case USB_SPEED_FULL:
713 case USB_SPEED_HIGH:
714 case USB_SPEED_SUPER:
715 case USB_SPEED_SUPER_PLUS:
716 break;
717 default:
718 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
719 return -ENXIO;
720 }
721
722 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
723 sizeof(*chip), &card);
724 if (err < 0) {
725 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
726 return err;
727 }
728
729 chip = card->private_data;
730 mutex_init(&chip->mutex);
731 init_waitqueue_head(&chip->shutdown_wait);
732 chip->index = idx;
733 chip->dev = dev;
734 chip->card = card;
735 chip->setup = device_setup[idx];
736 chip->generic_implicit_fb = implicit_fb[idx];
737 chip->autoclock = autoclock;
738 chip->lowlatency = lowlatency;
739 atomic_set(&chip->active, 1); /* avoid autopm during probing */
740 atomic_set(&chip->usage_count, 0);
741 atomic_set(&chip->shutdown, 0);
742
743 chip->usb_id = usb_id;
744 INIT_LIST_HEAD(&chip->pcm_list);
745 INIT_LIST_HEAD(&chip->ep_list);
746 INIT_LIST_HEAD(&chip->iface_ref_list);
747 INIT_LIST_HEAD(&chip->clock_ref_list);
748 INIT_LIST_HEAD(&chip->midi_list);
749 INIT_LIST_HEAD(&chip->midi_v2_list);
750 INIT_LIST_HEAD(&chip->mixer_list);
751
752 if (quirk_flags[idx])
753 chip->quirk_flags = quirk_flags[idx];
754 else
755 snd_usb_init_quirk_flags(chip);
756
757 card->private_free = snd_usb_audio_free;
758
759 strcpy(card->driver, "USB-Audio");
760 sprintf(component, "USB%04x:%04x",
761 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
762 snd_component_add(card, component);
763
764 usb_audio_make_shortname(dev, chip, quirk);
765 usb_audio_make_longname(dev, chip, quirk);
766
767 snd_usb_audio_create_proc(chip);
768
769 *rchip = chip;
770 return 0;
771}
772
773/* look for a matching quirk alias id */
774static bool get_alias_id(struct usb_device *dev, unsigned int *id)
775{
776 int i;
777 unsigned int src, dst;
778
779 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
780 if (!quirk_alias[i] ||
781 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
782 src != *id)
783 continue;
784 dev_info(&dev->dev,
785 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
786 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
787 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
788 *id = dst;
789 return true;
790 }
791
792 return false;
793}
794
795static int check_delayed_register_option(struct snd_usb_audio *chip)
796{
797 int i;
798 unsigned int id, inum;
799
800 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
801 if (delayed_register[i] &&
802 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
803 id == chip->usb_id)
804 return inum;
805 }
806
807 return -1;
808}
809
810static const struct usb_device_id usb_audio_ids[]; /* defined below */
811
812/* look for the last interface that matches with our ids and remember it */
813static void find_last_interface(struct snd_usb_audio *chip)
814{
815 struct usb_host_config *config = chip->dev->actconfig;
816 struct usb_interface *intf;
817 int i;
818
819 if (!config)
820 return;
821 for (i = 0; i < config->desc.bNumInterfaces; i++) {
822 intf = config->interface[i];
823 if (usb_match_id(intf, usb_audio_ids))
824 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
825 }
826 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
827}
828
829/* look for the corresponding quirk */
830static const struct snd_usb_audio_quirk *
831get_alias_quirk(struct usb_device *dev, unsigned int id)
832{
833 const struct usb_device_id *p;
834
835 for (p = usb_audio_ids; p->match_flags; p++) {
836 /* FIXME: this checks only vendor:product pair in the list */
837 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
838 USB_DEVICE_ID_MATCH_DEVICE &&
839 p->idVendor == USB_ID_VENDOR(id) &&
840 p->idProduct == USB_ID_PRODUCT(id))
841 return (const struct snd_usb_audio_quirk *)p->driver_info;
842 }
843
844 return NULL;
845}
846
847/* register card if we reach to the last interface or to the specified
848 * one given via option
849 */
850static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
851{
852 if (check_delayed_register_option(chip) == ifnum ||
853 chip->last_iface == ifnum ||
854 usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface)))
855 return snd_card_register(chip->card);
856 return 0;
857}
858
859/*
860 * probe the active usb device
861 *
862 * note that this can be called multiple times per a device, when it
863 * includes multiple audio control interfaces.
864 *
865 * thus we check the usb device pointer and creates the card instance
866 * only at the first time. the successive calls of this function will
867 * append the pcm interface to the corresponding card.
868 */
869static int usb_audio_probe(struct usb_interface *intf,
870 const struct usb_device_id *usb_id)
871{
872 struct usb_device *dev = interface_to_usbdev(intf);
873 const struct snd_usb_audio_quirk *quirk =
874 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
875 struct snd_usb_audio *chip;
876 int i, err;
877 struct usb_host_interface *alts;
878 int ifnum;
879 u32 id;
880
881 alts = &intf->altsetting[0];
882 ifnum = get_iface_desc(alts)->bInterfaceNumber;
883 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
884 le16_to_cpu(dev->descriptor.idProduct));
885 if (get_alias_id(dev, &id))
886 quirk = get_alias_quirk(dev, id);
887 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
888 return -ENXIO;
889 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
890 return -ENODEV;
891
892 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
893 if (err < 0)
894 return err;
895
896 /*
897 * found a config. now register to ALSA
898 */
899
900 /* check whether it's already registered */
901 chip = NULL;
902 mutex_lock(&register_mutex);
903 for (i = 0; i < SNDRV_CARDS; i++) {
904 if (usb_chip[i] && usb_chip[i]->dev == dev) {
905 if (atomic_read(&usb_chip[i]->shutdown)) {
906 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
907 err = -EIO;
908 goto __error;
909 }
910 chip = usb_chip[i];
911 atomic_inc(&chip->active); /* avoid autopm */
912 break;
913 }
914 }
915 if (! chip) {
916 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
917 if (err < 0)
918 goto __error;
919
920 /* it's a fresh one.
921 * now look for an empty slot and create a new card instance
922 */
923 for (i = 0; i < SNDRV_CARDS; i++)
924 if (!usb_chip[i] &&
925 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
926 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
927 if (enable[i]) {
928 err = snd_usb_audio_create(intf, dev, i, quirk,
929 id, &chip);
930 if (err < 0)
931 goto __error;
932 break;
933 } else if (vid[i] != -1 || pid[i] != -1) {
934 dev_info(&dev->dev,
935 "device (%04x:%04x) is disabled\n",
936 USB_ID_VENDOR(id),
937 USB_ID_PRODUCT(id));
938 err = -ENOENT;
939 goto __error;
940 }
941 }
942 if (!chip) {
943 dev_err(&dev->dev, "no available usb audio device\n");
944 err = -ENODEV;
945 goto __error;
946 }
947 find_last_interface(chip);
948 }
949
950 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
951 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
952 err = -EINVAL;
953 goto __error;
954 }
955
956 dev_set_drvdata(&dev->dev, chip);
957
958 if (ignore_ctl_error)
959 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
960
961 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
962 usb_disable_autosuspend(interface_to_usbdev(intf));
963
964 /*
965 * For devices with more than one control interface, we assume the
966 * first contains the audio controls. We might need a more specific
967 * check here in the future.
968 */
969 if (!chip->ctrl_intf)
970 chip->ctrl_intf = alts;
971
972 err = 1; /* continue */
973 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
974 /* need some special handlings */
975 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
976 if (err < 0)
977 goto __error;
978 }
979
980 if (err > 0) {
981 /* create normal USB audio interfaces */
982 err = snd_usb_create_streams(chip, ifnum);
983 if (err < 0)
984 goto __error;
985 err = snd_usb_create_mixer(chip, ifnum);
986 if (err < 0)
987 goto __error;
988 }
989
990 if (chip->need_delayed_register) {
991 dev_info(&dev->dev,
992 "Found post-registration device assignment: %08x:%02x\n",
993 chip->usb_id, ifnum);
994 chip->need_delayed_register = false; /* clear again */
995 }
996
997 err = try_to_register_card(chip, ifnum);
998 if (err < 0)
999 goto __error_no_register;
1000
1001 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
1002 /* don't want to fail when snd_media_device_create() fails */
1003 snd_media_device_create(chip, intf);
1004 }
1005
1006 if (quirk)
1007 chip->quirk_type = quirk->type;
1008
1009 usb_chip[chip->index] = chip;
1010 chip->intf[chip->num_interfaces] = intf;
1011 chip->num_interfaces++;
1012 usb_set_intfdata(intf, chip);
1013 atomic_dec(&chip->active);
1014
1015 if (platform_ops && platform_ops->connect_cb)
1016 platform_ops->connect_cb(chip);
1017 mutex_unlock(&register_mutex);
1018
1019 return 0;
1020
1021 __error:
1022 /* in the case of error in secondary interface, still try to register */
1023 if (chip)
1024 try_to_register_card(chip, ifnum);
1025
1026 __error_no_register:
1027 if (chip) {
1028 /* chip->active is inside the chip->card object,
1029 * decrement before memory is possibly returned.
1030 */
1031 atomic_dec(&chip->active);
1032 if (!chip->num_interfaces)
1033 snd_card_free(chip->card);
1034 }
1035 mutex_unlock(&register_mutex);
1036 return err;
1037}
1038
1039/*
1040 * we need to take care of counter, since disconnection can be called also
1041 * many times as well as usb_audio_probe().
1042 */
1043static void usb_audio_disconnect(struct usb_interface *intf)
1044{
1045 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1046 struct snd_card *card;
1047 struct list_head *p;
1048
1049 if (chip == USB_AUDIO_IFACE_UNUSED)
1050 return;
1051
1052 card = chip->card;
1053
1054 mutex_lock(&register_mutex);
1055 if (platform_ops && platform_ops->disconnect_cb)
1056 platform_ops->disconnect_cb(chip);
1057
1058 if (atomic_inc_return(&chip->shutdown) == 1) {
1059 struct snd_usb_stream *as;
1060 struct snd_usb_endpoint *ep;
1061 struct usb_mixer_interface *mixer;
1062
1063 /* wait until all pending tasks done;
1064 * they are protected by snd_usb_lock_shutdown()
1065 */
1066 wait_event(chip->shutdown_wait,
1067 !atomic_read(&chip->usage_count));
1068 snd_card_disconnect(card);
1069 /* release the pcm resources */
1070 list_for_each_entry(as, &chip->pcm_list, list) {
1071 snd_usb_stream_disconnect(as);
1072 }
1073 /* release the endpoint resources */
1074 list_for_each_entry(ep, &chip->ep_list, list) {
1075 snd_usb_endpoint_release(ep);
1076 }
1077 /* release the midi resources */
1078 list_for_each(p, &chip->midi_list) {
1079 snd_usbmidi_disconnect(p);
1080 }
1081 snd_usb_midi_v2_disconnect_all(chip);
1082 /*
1083 * Nice to check quirk && quirk->shares_media_device and
1084 * then call the snd_media_device_delete(). Don't have
1085 * access to the quirk here. snd_media_device_delete()
1086 * accesses mixer_list
1087 */
1088 snd_media_device_delete(chip);
1089
1090 /* release mixer resources */
1091 list_for_each_entry(mixer, &chip->mixer_list, list) {
1092 snd_usb_mixer_disconnect(mixer);
1093 }
1094 }
1095
1096 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
1097 usb_enable_autosuspend(interface_to_usbdev(intf));
1098
1099 chip->num_interfaces--;
1100 if (chip->num_interfaces <= 0) {
1101 usb_chip[chip->index] = NULL;
1102 mutex_unlock(&register_mutex);
1103 snd_card_free_when_closed(card);
1104 } else {
1105 mutex_unlock(&register_mutex);
1106 }
1107}
1108
1109/* lock the shutdown (disconnect) task and autoresume */
1110int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1111{
1112 int err;
1113
1114 atomic_inc(&chip->usage_count);
1115 if (atomic_read(&chip->shutdown)) {
1116 err = -EIO;
1117 goto error;
1118 }
1119 err = snd_usb_autoresume(chip);
1120 if (err < 0)
1121 goto error;
1122 return 0;
1123
1124 error:
1125 if (atomic_dec_and_test(&chip->usage_count))
1126 wake_up(&chip->shutdown_wait);
1127 return err;
1128}
1129EXPORT_SYMBOL_GPL(snd_usb_lock_shutdown);
1130
1131/* autosuspend and unlock the shutdown */
1132void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1133{
1134 snd_usb_autosuspend(chip);
1135 if (atomic_dec_and_test(&chip->usage_count))
1136 wake_up(&chip->shutdown_wait);
1137}
1138EXPORT_SYMBOL_GPL(snd_usb_unlock_shutdown);
1139
1140int snd_usb_autoresume(struct snd_usb_audio *chip)
1141{
1142 int i, err;
1143
1144 if (atomic_read(&chip->shutdown))
1145 return -EIO;
1146 if (atomic_inc_return(&chip->active) != 1)
1147 return 0;
1148
1149 for (i = 0; i < chip->num_interfaces; i++) {
1150 err = usb_autopm_get_interface(chip->intf[i]);
1151 if (err < 0) {
1152 /* rollback */
1153 while (--i >= 0)
1154 usb_autopm_put_interface(chip->intf[i]);
1155 atomic_dec(&chip->active);
1156 return err;
1157 }
1158 }
1159 return 0;
1160}
1161EXPORT_SYMBOL_GPL(snd_usb_autoresume);
1162
1163void snd_usb_autosuspend(struct snd_usb_audio *chip)
1164{
1165 int i;
1166
1167 if (atomic_read(&chip->shutdown))
1168 return;
1169 if (!atomic_dec_and_test(&chip->active))
1170 return;
1171
1172 for (i = 0; i < chip->num_interfaces; i++)
1173 usb_autopm_put_interface(chip->intf[i]);
1174}
1175EXPORT_SYMBOL_GPL(snd_usb_autosuspend);
1176
1177static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1178{
1179 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1180 struct snd_usb_stream *as;
1181 struct snd_usb_endpoint *ep;
1182 struct usb_mixer_interface *mixer;
1183 struct list_head *p;
1184
1185 if (chip == USB_AUDIO_IFACE_UNUSED)
1186 return 0;
1187
1188 if (!chip->num_suspended_intf++) {
1189 list_for_each_entry(as, &chip->pcm_list, list)
1190 snd_usb_pcm_suspend(as);
1191 list_for_each_entry(ep, &chip->ep_list, list)
1192 snd_usb_endpoint_suspend(ep);
1193 list_for_each(p, &chip->midi_list)
1194 snd_usbmidi_suspend(p);
1195 list_for_each_entry(mixer, &chip->mixer_list, list)
1196 snd_usb_mixer_suspend(mixer);
1197 snd_usb_midi_v2_suspend_all(chip);
1198 }
1199
1200 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1201 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1202 chip->system_suspend = chip->num_suspended_intf;
1203 }
1204
1205 if (platform_ops && platform_ops->suspend_cb)
1206 platform_ops->suspend_cb(intf, message);
1207
1208 return 0;
1209}
1210
1211static int usb_audio_resume(struct usb_interface *intf)
1212{
1213 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1214 struct snd_usb_stream *as;
1215 struct usb_mixer_interface *mixer;
1216 struct list_head *p;
1217 int err = 0;
1218
1219 if (chip == USB_AUDIO_IFACE_UNUSED)
1220 return 0;
1221
1222 atomic_inc(&chip->active); /* avoid autopm */
1223 if (chip->num_suspended_intf > 1)
1224 goto out;
1225
1226 list_for_each_entry(as, &chip->pcm_list, list) {
1227 err = snd_usb_pcm_resume(as);
1228 if (err < 0)
1229 goto err_out;
1230 }
1231
1232 /*
1233 * ALSA leaves material resumption to user space
1234 * we just notify and restart the mixers
1235 */
1236 list_for_each_entry(mixer, &chip->mixer_list, list) {
1237 err = snd_usb_mixer_resume(mixer);
1238 if (err < 0)
1239 goto err_out;
1240 }
1241
1242 list_for_each(p, &chip->midi_list) {
1243 snd_usbmidi_resume(p);
1244 }
1245
1246 snd_usb_midi_v2_resume_all(chip);
1247
1248 if (platform_ops && platform_ops->resume_cb)
1249 platform_ops->resume_cb(intf);
1250
1251 out:
1252 if (chip->num_suspended_intf == chip->system_suspend) {
1253 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1254 chip->system_suspend = 0;
1255 }
1256 chip->num_suspended_intf--;
1257
1258err_out:
1259 atomic_dec(&chip->active); /* allow autopm after this point */
1260 return err;
1261}
1262
1263static const struct usb_device_id usb_audio_ids [] = {
1264#include "quirks-table.h"
1265 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1266 .bInterfaceClass = USB_CLASS_AUDIO,
1267 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1268 { } /* Terminating entry */
1269};
1270MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1271
1272/*
1273 * entry point for linux usb interface
1274 */
1275
1276static struct usb_driver usb_audio_driver = {
1277 .name = "snd-usb-audio",
1278 .probe = usb_audio_probe,
1279 .disconnect = usb_audio_disconnect,
1280 .suspend = usb_audio_suspend,
1281 .resume = usb_audio_resume,
1282 .reset_resume = usb_audio_resume,
1283 .id_table = usb_audio_ids,
1284 .supports_autosuspend = 1,
1285};
1286
1287module_usb_driver(usb_audio_driver);
Linux 6.x block layer and io_uring tree(s)