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
59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60 MODULE_DESCRIPTION("USB Audio");
61 MODULE_LICENSE("GPL");
62 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
67 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
68 /* Vendor/product IDs for this card */
69 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
70 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
71 static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
72 static bool ignore_ctl_error;
73 static bool autoclock = true;
74 static char *quirk_alias[SNDRV_CARDS];
75 static char *delayed_register[SNDRV_CARDS];
76
77 bool snd_usb_use_vmalloc = true;
78 bool snd_usb_skip_validation;
79
80 module_param_array(index, int, NULL, 0444);
81 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
82 module_param_array(id, charp, NULL, 0444);
83 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
84 module_param_array(enable, bool, NULL, 0444);
85 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
86 module_param_array(vid, int, NULL, 0444);
87 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
88 module_param_array(pid, int, NULL, 0444);
89 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
90 module_param_array(device_setup, int, NULL, 0444);
91 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
92 module_param(ignore_ctl_error, bool, 0444);
93 MODULE_PARM_DESC(ignore_ctl_error,
94 "Ignore errors from USB controller for mixer interfaces.");
95 module_param(autoclock, bool, 0444);
96 MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
97 module_param_array(quirk_alias, charp, NULL, 0444);
98 MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
99 module_param_array(delayed_register, charp, NULL, 0444);
100 MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
101 module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
102 MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
103 module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
104 MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
105
106 /*
107 * we keep the snd_usb_audio_t instances by ourselves for merging
108 * the all interfaces on the same card as one sound device.
109 */
110
111 static DEFINE_MUTEX(register_mutex);
112 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
113 static struct usb_driver usb_audio_driver;
114
115 static struct snd_usb_audio_vendor_ops *usb_vendor_ops;
116
snd_vendor_set_ops(struct snd_usb_audio_vendor_ops * ops)117 int snd_vendor_set_ops(struct snd_usb_audio_vendor_ops *ops)
118 {
119 if ((!ops->connect) ||
120 (!ops->disconnect) ||
121 (!ops->set_interface) ||
122 (!ops->set_rate) ||
123 (!ops->set_pcm_buf) ||
124 (!ops->set_pcm_intf) ||
125 (!ops->set_pcm_connection) ||
126 (!ops->set_pcm_binterval) ||
127 (!ops->usb_add_ctls))
128 return -EINVAL;
129
130 usb_vendor_ops = ops;
131 return 0;
132 }
133 EXPORT_SYMBOL_GPL(snd_vendor_set_ops);
134
snd_vendor_get_ops(void)135 struct snd_usb_audio_vendor_ops *snd_vendor_get_ops(void)
136 {
137 return usb_vendor_ops;
138 }
139
snd_vendor_connect(struct usb_interface * intf)140 static int snd_vendor_connect(struct usb_interface *intf)
141 {
142 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
143
144 if (ops)
145 return ops->connect(intf);
146 return 0;
147 }
148
snd_vendor_disconnect(struct usb_interface * intf)149 static void snd_vendor_disconnect(struct usb_interface *intf)
150 {
151 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
152
153 if (ops)
154 ops->disconnect(intf);
155 }
156
snd_vendor_set_interface(struct usb_device * udev,struct usb_host_interface * intf,int iface,int alt)157 int snd_vendor_set_interface(struct usb_device *udev,
158 struct usb_host_interface *intf,
159 int iface, int alt)
160 {
161 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
162
163 if (ops)
164 return ops->set_interface(udev, intf, iface, alt);
165 return 0;
166 }
167
snd_vendor_set_rate(struct usb_interface * intf,int iface,int rate,int alt)168 int snd_vendor_set_rate(struct usb_interface *intf, int iface, int rate,
169 int alt)
170 {
171 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
172
173 if (ops)
174 return ops->set_rate(intf, iface, rate, alt);
175 return 0;
176 }
177
snd_vendor_set_pcm_buf(struct usb_device * udev,int iface)178 int snd_vendor_set_pcm_buf(struct usb_device *udev, int iface)
179 {
180 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
181
182 if (ops)
183 ops->set_pcm_buf(udev, iface);
184 return 0;
185 }
186
snd_vendor_set_pcm_intf(struct usb_interface * intf,int iface,int alt,int direction)187 int snd_vendor_set_pcm_intf(struct usb_interface *intf, int iface, int alt,
188 int direction)
189 {
190 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
191
192 if (ops)
193 return ops->set_pcm_intf(intf, iface, alt, direction);
194 return 0;
195 }
196
snd_vendor_set_pcm_connection(struct usb_device * udev,enum snd_vendor_pcm_open_close onoff,int direction)197 int snd_vendor_set_pcm_connection(struct usb_device *udev,
198 enum snd_vendor_pcm_open_close onoff,
199 int direction)
200 {
201 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
202
203 if (ops)
204 return ops->set_pcm_connection(udev, onoff, direction);
205 return 0;
206 }
207
snd_vendor_set_pcm_binterval(struct audioformat * fp,struct audioformat * found,int * cur_attr,int * attr)208 int snd_vendor_set_pcm_binterval(struct audioformat *fp,
209 struct audioformat *found,
210 int *cur_attr, int *attr)
211 {
212 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
213
214 if (ops)
215 return ops->set_pcm_binterval(fp, found, cur_attr, attr);
216 return 0;
217 }
218
snd_vendor_usb_add_ctls(struct snd_usb_audio * chip)219 static int snd_vendor_usb_add_ctls(struct snd_usb_audio *chip)
220 {
221 struct snd_usb_audio_vendor_ops *ops = snd_vendor_get_ops();
222
223 if (ops)
224 return ops->usb_add_ctls(chip);
225 return 0;
226 }
227
find_snd_usb_substream(unsigned int card_num,unsigned int pcm_idx,unsigned int direction,struct snd_usb_audio ** uchip,void (* disconnect_cb)(struct snd_usb_audio * chip))228 struct snd_usb_substream *find_snd_usb_substream(unsigned int card_num,
229 unsigned int pcm_idx, unsigned int direction, struct snd_usb_audio
230 **uchip, void (*disconnect_cb)(struct snd_usb_audio *chip))
231 {
232 int idx;
233 struct snd_usb_stream *as;
234 struct snd_usb_substream *subs = NULL;
235 struct snd_usb_audio *chip = NULL;
236
237 mutex_lock(®ister_mutex);
238 /*
239 * legacy audio snd card number assignment is dynamic. Hence
240 * search using chip->card->number
241 */
242 for (idx = 0; idx < SNDRV_CARDS; idx++) {
243 if (!usb_chip[idx])
244 continue;
245 if (usb_chip[idx]->card->number == card_num) {
246 chip = usb_chip[idx];
247 break;
248 }
249 }
250
251 if (!chip || atomic_read(&chip->shutdown)) {
252 pr_debug("%s: instance of usb crad # %d does not exist\n",
253 __func__, card_num);
254 goto err;
255 }
256
257 if (pcm_idx >= chip->pcm_devs) {
258 pr_err("%s: invalid pcm dev number %u > %d\n", __func__,
259 pcm_idx, chip->pcm_devs);
260 goto err;
261 }
262
263 if (direction > SNDRV_PCM_STREAM_CAPTURE) {
264 pr_err("%s: invalid direction %u\n", __func__, direction);
265 goto err;
266 }
267
268 list_for_each_entry(as, &chip->pcm_list, list) {
269 if (as->pcm_index == pcm_idx) {
270 subs = &as->substream[direction];
271 if (subs->interface < 0 && !subs->data_endpoint &&
272 !subs->sync_endpoint) {
273 pr_debug("%s: stream disconnected, bail out\n",
274 __func__);
275 subs = NULL;
276 goto err;
277 }
278 goto done;
279 }
280 }
281
282 done:
283 chip->card_num = card_num;
284 chip->disconnect_cb = disconnect_cb;
285 err:
286 *uchip = chip;
287 if (!subs)
288 pr_debug("%s: substream instance not found\n", __func__);
289 mutex_unlock(®ister_mutex);
290 return subs;
291 }
292 EXPORT_SYMBOL_GPL(find_snd_usb_substream);
293
294 /*
295 * disconnect streams
296 * called from usb_audio_disconnect()
297 */
snd_usb_stream_disconnect(struct snd_usb_stream * as)298 static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
299 {
300 int idx;
301 struct snd_usb_substream *subs;
302
303 for (idx = 0; idx < 2; idx++) {
304 subs = &as->substream[idx];
305 if (!subs->num_formats)
306 continue;
307 subs->interface = -1;
308 subs->data_endpoint = NULL;
309 subs->sync_endpoint = NULL;
310 }
311 }
312
snd_usb_create_stream(struct snd_usb_audio * chip,int ctrlif,int interface)313 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
314 {
315 struct usb_device *dev = chip->dev;
316 struct usb_host_interface *alts;
317 struct usb_interface_descriptor *altsd;
318 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
319
320 if (!iface) {
321 dev_err(&dev->dev, "%u:%d : does not exist\n",
322 ctrlif, interface);
323 return -EINVAL;
324 }
325
326 alts = &iface->altsetting[0];
327 altsd = get_iface_desc(alts);
328
329 /*
330 * Android with both accessory and audio interfaces enabled gets the
331 * interface numbers wrong.
332 */
333 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
334 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
335 interface == 0 &&
336 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
337 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
338 interface = 2;
339 iface = usb_ifnum_to_if(dev, interface);
340 if (!iface)
341 return -EINVAL;
342 alts = &iface->altsetting[0];
343 altsd = get_iface_desc(alts);
344 }
345
346 if (usb_interface_claimed(iface)) {
347 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
348 ctrlif, interface);
349 return -EINVAL;
350 }
351
352 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
353 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
354 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
355 int err = __snd_usbmidi_create(chip->card, iface,
356 &chip->midi_list, NULL,
357 chip->usb_id);
358 if (err < 0) {
359 dev_err(&dev->dev,
360 "%u:%d: cannot create sequencer device\n",
361 ctrlif, interface);
362 return -EINVAL;
363 }
364 return usb_driver_claim_interface(&usb_audio_driver, iface,
365 USB_AUDIO_IFACE_UNUSED);
366 }
367
368 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
369 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
370 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
371 dev_dbg(&dev->dev,
372 "%u:%d: skipping non-supported interface %d\n",
373 ctrlif, interface, altsd->bInterfaceClass);
374 /* skip non-supported classes */
375 return -EINVAL;
376 }
377
378 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
379 dev_err(&dev->dev, "low speed audio streaming not supported\n");
380 return -EINVAL;
381 }
382
383 if (! snd_usb_parse_audio_interface(chip, interface)) {
384 usb_set_interface(dev, interface, 0); /* reset the current interface */
385 return usb_driver_claim_interface(&usb_audio_driver, iface,
386 USB_AUDIO_IFACE_UNUSED);
387 }
388
389 return 0;
390 }
391
392 /*
393 * parse audio control descriptor and create pcm/midi streams
394 */
snd_usb_create_streams(struct snd_usb_audio * chip,int ctrlif)395 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
396 {
397 struct usb_device *dev = chip->dev;
398 struct usb_host_interface *host_iface;
399 struct usb_interface_descriptor *altsd;
400 int i, protocol;
401
402 /* find audiocontrol interface */
403 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
404 altsd = get_iface_desc(host_iface);
405 protocol = altsd->bInterfaceProtocol;
406
407 switch (protocol) {
408 default:
409 dev_warn(&dev->dev,
410 "unknown interface protocol %#02x, assuming v1\n",
411 protocol);
412 fallthrough;
413
414 case UAC_VERSION_1: {
415 struct uac1_ac_header_descriptor *h1;
416 int rest_bytes;
417
418 h1 = snd_usb_find_csint_desc(host_iface->extra,
419 host_iface->extralen,
420 NULL, UAC_HEADER);
421 if (!h1 || h1->bLength < sizeof(*h1)) {
422 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
423 return -EINVAL;
424 }
425
426 rest_bytes = (void *)(host_iface->extra +
427 host_iface->extralen) - (void *)h1;
428
429 /* just to be sure -- this shouldn't hit at all */
430 if (rest_bytes <= 0) {
431 dev_err(&dev->dev, "invalid control header\n");
432 return -EINVAL;
433 }
434
435 if (rest_bytes < sizeof(*h1)) {
436 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
437 return -EINVAL;
438 }
439
440 if (!h1->bInCollection) {
441 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
442 return -EINVAL;
443 }
444
445 if (rest_bytes < h1->bLength) {
446 dev_err(&dev->dev, "invalid buffer length (v1)\n");
447 return -EINVAL;
448 }
449
450 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
451 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
452 return -EINVAL;
453 }
454
455 for (i = 0; i < h1->bInCollection; i++)
456 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
457
458 break;
459 }
460
461 case UAC_VERSION_2:
462 case UAC_VERSION_3: {
463 struct usb_interface_assoc_descriptor *assoc =
464 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
465
466 if (!assoc) {
467 /*
468 * Firmware writers cannot count to three. So to find
469 * the IAD on the NuForce UDH-100, also check the next
470 * interface.
471 */
472 struct usb_interface *iface =
473 usb_ifnum_to_if(dev, ctrlif + 1);
474 if (iface &&
475 iface->intf_assoc &&
476 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
477 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
478 assoc = iface->intf_assoc;
479 }
480
481 if (!assoc) {
482 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
483 return -EINVAL;
484 }
485
486 if (protocol == UAC_VERSION_3) {
487 int badd = assoc->bFunctionSubClass;
488
489 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
490 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
491 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
492 dev_err(&dev->dev,
493 "Unsupported UAC3 BADD profile\n");
494 return -EINVAL;
495 }
496
497 chip->badd_profile = badd;
498 }
499
500 for (i = 0; i < assoc->bInterfaceCount; i++) {
501 int intf = assoc->bFirstInterface + i;
502
503 if (intf != ctrlif)
504 snd_usb_create_stream(chip, ctrlif, intf);
505 }
506
507 break;
508 }
509 }
510
511 return 0;
512 }
513
514 /*
515 * Profile name preset table
516 */
517 struct usb_audio_device_name {
518 u32 id;
519 const char *vendor_name;
520 const char *product_name;
521 const char *profile_name; /* override card->longname */
522 };
523
524 #define PROFILE_NAME(vid, pid, vendor, product, profile) \
525 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
526 .product_name = (product), .profile_name = (profile) }
527 #define DEVICE_NAME(vid, pid, vendor, product) \
528 PROFILE_NAME(vid, pid, vendor, product, NULL)
529
530 /* vendor/product and profile name presets, sorted in device id order */
531 static const struct usb_audio_device_name usb_audio_names[] = {
532 /* HP Thunderbolt Dock Audio Headset */
533 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
534 "HP-Thunderbolt-Dock-Audio-Headset"),
535 /* HP Thunderbolt Dock Audio Module */
536 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
537 "HP-Thunderbolt-Dock-Audio-Module"),
538
539 /* Two entries for Gigabyte TRX40 Aorus Master:
540 * TRX40 Aorus Master has two USB-audio devices, one for the front
541 * headphone with ESS SABRE9218 DAC chip, while another for the rest
542 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
543 * Here we provide two distinct names for making UCM profiles easier.
544 */
545 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
546 "Gigabyte-Aorus-Master-Front-Headphone"),
547 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
548 "Gigabyte-Aorus-Master-Main-Audio"),
549
550 /* Gigabyte TRX40 Aorus Pro WiFi */
551 PROFILE_NAME(0x0414, 0xa002,
552 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
553
554 /* Creative/E-Mu devices */
555 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
556 /* Creative/Toshiba Multimedia Center SB-0500 */
557 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
558
559 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
560
561 /* ASUS ROG Zenith II: this machine has also two devices, one for
562 * the front headphone and another for the rest
563 */
564 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
565 "Zenith-II-Front-Headphone"),
566 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
567 "Zenith-II-Main-Audio"),
568
569 /* ASUS ROG Strix */
570 PROFILE_NAME(0x0b05, 0x1917,
571 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
572 /* ASUS PRIME TRX40 PRO-S */
573 PROFILE_NAME(0x0b05, 0x1918,
574 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
575
576 /* Dell WD15 Dock */
577 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
578 /* Dell WD19 Dock */
579 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
580
581 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
582
583 /*
584 * The original product_name is "USB Sound Device", however this name
585 * is also used by the CM106 based cards, so make it unique.
586 */
587 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
588 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
589
590 /* MSI TRX40 Creator */
591 PROFILE_NAME(0x0db0, 0x0d64,
592 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
593 /* MSI TRX40 */
594 PROFILE_NAME(0x0db0, 0x543d,
595 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
596
597 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
598 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
599 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
600
601 /* aka. Serato Scratch Live DJ Box */
602 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
603
604 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
605 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
606 "Lenovo-ThinkStation-P620-Rear"),
607 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
608 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
609 "Lenovo-ThinkStation-P620-Main"),
610
611 /* Asrock TRX40 Creator */
612 PROFILE_NAME(0x26ce, 0x0a01,
613 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
614
615 { } /* terminator */
616 };
617
618 static const struct usb_audio_device_name *
lookup_device_name(u32 id)619 lookup_device_name(u32 id)
620 {
621 static const struct usb_audio_device_name *p;
622
623 for (p = usb_audio_names; p->id; p++)
624 if (p->id == id)
625 return p;
626 return NULL;
627 }
628
629 /*
630 * free the chip instance
631 *
632 * here we have to do not much, since pcm and controls are already freed
633 *
634 */
635
snd_usb_audio_free(struct snd_card * card)636 static void snd_usb_audio_free(struct snd_card *card)
637 {
638 struct snd_usb_audio *chip = card->private_data;
639 struct snd_usb_endpoint *ep, *n;
640
641 list_for_each_entry_safe(ep, n, &chip->ep_list, list)
642 snd_usb_endpoint_free(ep);
643
644 mutex_destroy(&chip->dev_lock);
645 mutex_destroy(&chip->mutex);
646 if (!atomic_read(&chip->shutdown))
647 dev_set_drvdata(&chip->dev->dev, NULL);
648 }
649
usb_audio_make_shortname(struct usb_device * dev,struct snd_usb_audio * chip,const struct snd_usb_audio_quirk * quirk)650 static void usb_audio_make_shortname(struct usb_device *dev,
651 struct snd_usb_audio *chip,
652 const struct snd_usb_audio_quirk *quirk)
653 {
654 struct snd_card *card = chip->card;
655 const struct usb_audio_device_name *preset;
656 const char *s = NULL;
657
658 preset = lookup_device_name(chip->usb_id);
659 if (preset && preset->product_name)
660 s = preset->product_name;
661 else if (quirk && quirk->product_name)
662 s = quirk->product_name;
663 if (s && *s) {
664 strlcpy(card->shortname, s, sizeof(card->shortname));
665 return;
666 }
667
668 /* retrieve the device string as shortname */
669 if (!dev->descriptor.iProduct ||
670 usb_string(dev, dev->descriptor.iProduct,
671 card->shortname, sizeof(card->shortname)) <= 0) {
672 /* no name available from anywhere, so use ID */
673 sprintf(card->shortname, "USB Device %#04x:%#04x",
674 USB_ID_VENDOR(chip->usb_id),
675 USB_ID_PRODUCT(chip->usb_id));
676 }
677
678 strim(card->shortname);
679 }
680
usb_audio_make_longname(struct usb_device * dev,struct snd_usb_audio * chip,const struct snd_usb_audio_quirk * quirk)681 static void usb_audio_make_longname(struct usb_device *dev,
682 struct snd_usb_audio *chip,
683 const struct snd_usb_audio_quirk *quirk)
684 {
685 struct snd_card *card = chip->card;
686 const struct usb_audio_device_name *preset;
687 const char *s = NULL;
688 int len;
689
690 preset = lookup_device_name(chip->usb_id);
691
692 /* shortcut - if any pre-defined string is given, use it */
693 if (preset && preset->profile_name)
694 s = preset->profile_name;
695 if (s && *s) {
696 strlcpy(card->longname, s, sizeof(card->longname));
697 return;
698 }
699
700 if (preset && preset->vendor_name)
701 s = preset->vendor_name;
702 else if (quirk && quirk->vendor_name)
703 s = quirk->vendor_name;
704 if (s && *s) {
705 len = strlcpy(card->longname, s, sizeof(card->longname));
706 } else {
707 /* retrieve the vendor and device strings as longname */
708 if (dev->descriptor.iManufacturer)
709 len = usb_string(dev, dev->descriptor.iManufacturer,
710 card->longname, sizeof(card->longname));
711 else
712 len = 0;
713 /* we don't really care if there isn't any vendor string */
714 }
715 if (len > 0) {
716 strim(card->longname);
717 if (*card->longname)
718 strlcat(card->longname, " ", sizeof(card->longname));
719 }
720
721 strlcat(card->longname, card->shortname, sizeof(card->longname));
722
723 len = strlcat(card->longname, " at ", sizeof(card->longname));
724
725 if (len < sizeof(card->longname))
726 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
727
728 switch (snd_usb_get_speed(dev)) {
729 case USB_SPEED_LOW:
730 strlcat(card->longname, ", low speed", sizeof(card->longname));
731 break;
732 case USB_SPEED_FULL:
733 strlcat(card->longname, ", full speed", sizeof(card->longname));
734 break;
735 case USB_SPEED_HIGH:
736 strlcat(card->longname, ", high speed", sizeof(card->longname));
737 break;
738 case USB_SPEED_SUPER:
739 strlcat(card->longname, ", super speed", sizeof(card->longname));
740 break;
741 case USB_SPEED_SUPER_PLUS:
742 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
743 break;
744 default:
745 break;
746 }
747 }
748
749 /*
750 * create a chip instance and set its names.
751 */
snd_usb_audio_create(struct usb_interface * intf,struct usb_device * dev,int idx,const struct snd_usb_audio_quirk * quirk,unsigned int usb_id,struct snd_usb_audio ** rchip)752 static int snd_usb_audio_create(struct usb_interface *intf,
753 struct usb_device *dev, int idx,
754 const struct snd_usb_audio_quirk *quirk,
755 unsigned int usb_id,
756 struct snd_usb_audio **rchip)
757 {
758 struct snd_card *card;
759 struct snd_usb_audio *chip;
760 int err;
761 char component[14];
762
763 *rchip = NULL;
764
765 switch (snd_usb_get_speed(dev)) {
766 case USB_SPEED_LOW:
767 case USB_SPEED_FULL:
768 case USB_SPEED_HIGH:
769 case USB_SPEED_WIRELESS:
770 case USB_SPEED_SUPER:
771 case USB_SPEED_SUPER_PLUS:
772 break;
773 default:
774 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
775 return -ENXIO;
776 }
777
778 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
779 sizeof(*chip), &card);
780 if (err < 0) {
781 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
782 return err;
783 }
784
785 chip = card->private_data;
786 mutex_init(&chip->mutex);
787 mutex_init(&chip->dev_lock);
788 init_waitqueue_head(&chip->shutdown_wait);
789 chip->index = idx;
790 chip->dev = dev;
791 chip->card = card;
792 chip->setup = device_setup[idx];
793 chip->autoclock = autoclock;
794 atomic_set(&chip->active, 1); /* avoid autopm during probing */
795 atomic_set(&chip->usage_count, 0);
796 atomic_set(&chip->shutdown, 0);
797
798 chip->usb_id = usb_id;
799 INIT_LIST_HEAD(&chip->pcm_list);
800 INIT_LIST_HEAD(&chip->ep_list);
801 INIT_LIST_HEAD(&chip->midi_list);
802 INIT_LIST_HEAD(&chip->mixer_list);
803
804 card->private_free = snd_usb_audio_free;
805
806 strcpy(card->driver, "USB-Audio");
807 sprintf(component, "USB%04x:%04x",
808 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
809 snd_component_add(card, component);
810
811 usb_audio_make_shortname(dev, chip, quirk);
812 usb_audio_make_longname(dev, chip, quirk);
813
814 snd_usb_audio_create_proc(chip);
815
816 *rchip = chip;
817 return 0;
818 }
819
820 /* look for a matching quirk alias id */
get_alias_id(struct usb_device * dev,unsigned int * id)821 static bool get_alias_id(struct usb_device *dev, unsigned int *id)
822 {
823 int i;
824 unsigned int src, dst;
825
826 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
827 if (!quirk_alias[i] ||
828 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
829 src != *id)
830 continue;
831 dev_info(&dev->dev,
832 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
833 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
834 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
835 *id = dst;
836 return true;
837 }
838
839 return false;
840 }
841
check_delayed_register_option(struct snd_usb_audio * chip,int iface)842 static bool check_delayed_register_option(struct snd_usb_audio *chip, int iface)
843 {
844 int i;
845 unsigned int id, inum;
846
847 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
848 if (delayed_register[i] &&
849 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
850 id == chip->usb_id)
851 return iface < inum;
852 }
853
854 return false;
855 }
856
857 static const struct usb_device_id usb_audio_ids[]; /* defined below */
858
859 /* look for the corresponding quirk */
860 static const struct snd_usb_audio_quirk *
get_alias_quirk(struct usb_device * dev,unsigned int id)861 get_alias_quirk(struct usb_device *dev, unsigned int id)
862 {
863 const struct usb_device_id *p;
864
865 for (p = usb_audio_ids; p->match_flags; p++) {
866 /* FIXME: this checks only vendor:product pair in the list */
867 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
868 USB_DEVICE_ID_MATCH_DEVICE &&
869 p->idVendor == USB_ID_VENDOR(id) &&
870 p->idProduct == USB_ID_PRODUCT(id))
871 return (const struct snd_usb_audio_quirk *)p->driver_info;
872 }
873
874 return NULL;
875 }
876
877 /*
878 * probe the active usb device
879 *
880 * note that this can be called multiple times per a device, when it
881 * includes multiple audio control interfaces.
882 *
883 * thus we check the usb device pointer and creates the card instance
884 * only at the first time. the successive calls of this function will
885 * append the pcm interface to the corresponding card.
886 */
usb_audio_probe(struct usb_interface * intf,const struct usb_device_id * usb_id)887 static int usb_audio_probe(struct usb_interface *intf,
888 const struct usb_device_id *usb_id)
889 {
890 struct usb_device *dev = interface_to_usbdev(intf);
891 const struct snd_usb_audio_quirk *quirk =
892 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
893 struct snd_usb_audio *chip;
894 int i, err;
895 struct usb_host_interface *alts;
896 int ifnum;
897 u32 id;
898
899 alts = &intf->altsetting[0];
900 ifnum = get_iface_desc(alts)->bInterfaceNumber;
901 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
902 le16_to_cpu(dev->descriptor.idProduct));
903 if (get_alias_id(dev, &id))
904 quirk = get_alias_quirk(dev, id);
905 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
906 return -ENXIO;
907
908 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
909 if (err < 0)
910 return err;
911
912 err = snd_vendor_connect(intf);
913 if (err)
914 return err;
915
916 /*
917 * found a config. now register to ALSA
918 */
919
920 /* check whether it's already registered */
921 chip = NULL;
922 mutex_lock(®ister_mutex);
923 for (i = 0; i < SNDRV_CARDS; i++) {
924 if (usb_chip[i] && usb_chip[i]->dev == dev) {
925 if (atomic_read(&usb_chip[i]->shutdown)) {
926 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
927 err = -EIO;
928 goto __error;
929 }
930 chip = usb_chip[i];
931 atomic_inc(&chip->active); /* avoid autopm */
932 break;
933 }
934 }
935 if (! chip) {
936 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
937 if (err < 0)
938 goto __error;
939
940 /* it's a fresh one.
941 * now look for an empty slot and create a new card instance
942 */
943 for (i = 0; i < SNDRV_CARDS; i++)
944 if (!usb_chip[i] &&
945 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
946 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
947 if (enable[i]) {
948 err = snd_usb_audio_create(intf, dev, i, quirk,
949 id, &chip);
950 if (err < 0)
951 goto __error;
952 break;
953 } else if (vid[i] != -1 || pid[i] != -1) {
954 dev_info(&dev->dev,
955 "device (%04x:%04x) is disabled\n",
956 USB_ID_VENDOR(id),
957 USB_ID_PRODUCT(id));
958 err = -ENOENT;
959 goto __error;
960 }
961 }
962 if (!chip) {
963 dev_err(&dev->dev, "no available usb audio device\n");
964 err = -ENODEV;
965 goto __error;
966 }
967 }
968
969 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
970 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
971 err = -EINVAL;
972 goto __error;
973 }
974
975 dev_set_drvdata(&dev->dev, chip);
976
977 snd_vendor_usb_add_ctls(chip);
978
979 /*
980 * For devices with more than one control interface, we assume the
981 * first contains the audio controls. We might need a more specific
982 * check here in the future.
983 */
984 if (!chip->ctrl_intf)
985 chip->ctrl_intf = alts;
986
987 chip->txfr_quirk = 0;
988 err = 1; /* continue */
989 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
990 /* need some special handlings */
991 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
992 if (err < 0)
993 goto __error;
994 }
995
996 if (err > 0) {
997 /* create normal USB audio interfaces */
998 err = snd_usb_create_streams(chip, ifnum);
999 if (err < 0)
1000 goto __error;
1001 err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error);
1002 if (err < 0)
1003 goto __error;
1004 }
1005
1006 if (chip->need_delayed_register) {
1007 dev_info(&dev->dev,
1008 "Found post-registration device assignment: %08x:%02x\n",
1009 chip->usb_id, ifnum);
1010 chip->need_delayed_register = false; /* clear again */
1011 }
1012
1013 /* we are allowed to call snd_card_register() many times, but first
1014 * check to see if a device needs to skip it or do anything special
1015 */
1016 if (!snd_usb_registration_quirk(chip, ifnum) &&
1017 !check_delayed_register_option(chip, ifnum)) {
1018 err = snd_card_register(chip->card);
1019 if (err < 0)
1020 goto __error;
1021 }
1022
1023 if (quirk && quirk->shares_media_device) {
1024 /* don't want to fail when snd_media_device_create() fails */
1025 snd_media_device_create(chip, intf);
1026 }
1027
1028 if (quirk)
1029 chip->quirk_type = quirk->type;
1030
1031 usb_chip[chip->index] = chip;
1032 chip->intf[chip->num_interfaces] = intf;
1033 chip->num_interfaces++;
1034 usb_set_intfdata(intf, chip);
1035 atomic_dec(&chip->active);
1036 mutex_unlock(®ister_mutex);
1037 return 0;
1038
1039 __error:
1040 if (chip) {
1041 /* chip->active is inside the chip->card object,
1042 * decrement before memory is possibly returned.
1043 */
1044 atomic_dec(&chip->active);
1045 if (!chip->num_interfaces)
1046 snd_card_free(chip->card);
1047 }
1048 mutex_unlock(®ister_mutex);
1049 return err;
1050 }
1051
1052 /*
1053 * we need to take care of counter, since disconnection can be called also
1054 * many times as well as usb_audio_probe().
1055 */
usb_audio_disconnect(struct usb_interface * intf)1056 static void usb_audio_disconnect(struct usb_interface *intf)
1057 {
1058 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1059 struct snd_card *card;
1060 struct list_head *p;
1061
1062 if (chip == USB_AUDIO_IFACE_UNUSED)
1063 return;
1064
1065 card = chip->card;
1066
1067 if (chip->disconnect_cb)
1068 chip->disconnect_cb(chip);
1069
1070 snd_vendor_disconnect(intf);
1071
1072 mutex_lock(®ister_mutex);
1073 if (atomic_inc_return(&chip->shutdown) == 1) {
1074 struct snd_usb_stream *as;
1075 struct snd_usb_endpoint *ep;
1076 struct usb_mixer_interface *mixer;
1077
1078 /* wait until all pending tasks done;
1079 * they are protected by snd_usb_lock_shutdown()
1080 */
1081 wait_event(chip->shutdown_wait,
1082 !atomic_read(&chip->usage_count));
1083 snd_card_disconnect(card);
1084 /* release the pcm resources */
1085 list_for_each_entry(as, &chip->pcm_list, list) {
1086 snd_usb_stream_disconnect(as);
1087 }
1088 /* release the endpoint resources */
1089 list_for_each_entry(ep, &chip->ep_list, list) {
1090 snd_usb_endpoint_release(ep);
1091 }
1092 /* release the midi resources */
1093 list_for_each(p, &chip->midi_list) {
1094 snd_usbmidi_disconnect(p);
1095 }
1096 /*
1097 * Nice to check quirk && quirk->shares_media_device and
1098 * then call the snd_media_device_delete(). Don't have
1099 * access to the quirk here. snd_media_device_delete()
1100 * accesses mixer_list
1101 */
1102 snd_media_device_delete(chip);
1103
1104 /* release mixer resources */
1105 list_for_each_entry(mixer, &chip->mixer_list, list) {
1106 snd_usb_mixer_disconnect(mixer);
1107 }
1108 }
1109
1110 if (chip->quirk_type == QUIRK_SETUP_DISABLE_AUTOSUSPEND)
1111 usb_enable_autosuspend(interface_to_usbdev(intf));
1112
1113 chip->num_interfaces--;
1114 if (chip->num_interfaces <= 0) {
1115 usb_chip[chip->index] = NULL;
1116 mutex_unlock(®ister_mutex);
1117 snd_card_free_when_closed(card);
1118 } else {
1119 mutex_unlock(®ister_mutex);
1120 }
1121 }
1122
1123 /* lock the shutdown (disconnect) task and autoresume */
snd_usb_lock_shutdown(struct snd_usb_audio * chip)1124 int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1125 {
1126 int err;
1127
1128 atomic_inc(&chip->usage_count);
1129 if (atomic_read(&chip->shutdown)) {
1130 err = -EIO;
1131 goto error;
1132 }
1133 err = snd_usb_autoresume(chip);
1134 if (err < 0)
1135 goto error;
1136 return 0;
1137
1138 error:
1139 if (atomic_dec_and_test(&chip->usage_count))
1140 wake_up(&chip->shutdown_wait);
1141 return err;
1142 }
1143
1144 /* autosuspend and unlock the shutdown */
snd_usb_unlock_shutdown(struct snd_usb_audio * chip)1145 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1146 {
1147 snd_usb_autosuspend(chip);
1148 if (atomic_dec_and_test(&chip->usage_count))
1149 wake_up(&chip->shutdown_wait);
1150 }
1151
1152 #ifdef CONFIG_PM
1153
snd_usb_autoresume(struct snd_usb_audio * chip)1154 int snd_usb_autoresume(struct snd_usb_audio *chip)
1155 {
1156 int i, err;
1157
1158 if (atomic_read(&chip->shutdown))
1159 return -EIO;
1160 if (atomic_inc_return(&chip->active) != 1)
1161 return 0;
1162
1163 for (i = 0; i < chip->num_interfaces; i++) {
1164 err = usb_autopm_get_interface(chip->intf[i]);
1165 if (err < 0) {
1166 /* rollback */
1167 while (--i >= 0)
1168 usb_autopm_put_interface(chip->intf[i]);
1169 atomic_dec(&chip->active);
1170 return err;
1171 }
1172 }
1173 return 0;
1174 }
1175
snd_usb_autosuspend(struct snd_usb_audio * chip)1176 void snd_usb_autosuspend(struct snd_usb_audio *chip)
1177 {
1178 int i;
1179
1180 if (atomic_read(&chip->shutdown))
1181 return;
1182 if (!atomic_dec_and_test(&chip->active))
1183 return;
1184
1185 for (i = 0; i < chip->num_interfaces; i++)
1186 usb_autopm_put_interface(chip->intf[i]);
1187 }
1188
usb_audio_suspend(struct usb_interface * intf,pm_message_t message)1189 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1190 {
1191 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1192 struct snd_usb_stream *as;
1193 struct usb_mixer_interface *mixer;
1194 struct list_head *p;
1195
1196 if (chip == USB_AUDIO_IFACE_UNUSED)
1197 return 0;
1198
1199 if (!chip->num_suspended_intf++) {
1200 list_for_each_entry(as, &chip->pcm_list, list) {
1201 snd_usb_pcm_suspend(as);
1202 as->substream[0].need_setup_ep =
1203 as->substream[1].need_setup_ep = true;
1204 }
1205 list_for_each(p, &chip->midi_list)
1206 snd_usbmidi_suspend(p);
1207 list_for_each_entry(mixer, &chip->mixer_list, list)
1208 snd_usb_mixer_suspend(mixer);
1209 }
1210
1211 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1212 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1213 chip->system_suspend = chip->num_suspended_intf;
1214 }
1215
1216 return 0;
1217 }
1218
__usb_audio_resume(struct usb_interface * intf,bool reset_resume)1219 static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume)
1220 {
1221 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1222 struct snd_usb_stream *as;
1223 struct usb_mixer_interface *mixer;
1224 struct list_head *p;
1225 int err = 0;
1226
1227 if (chip == USB_AUDIO_IFACE_UNUSED)
1228 return 0;
1229
1230 atomic_inc(&chip->active); /* avoid autopm */
1231 if (chip->num_suspended_intf > 1)
1232 goto out;
1233
1234 list_for_each_entry(as, &chip->pcm_list, list) {
1235 err = snd_usb_pcm_resume(as);
1236 if (err < 0)
1237 goto err_out;
1238 }
1239
1240 /*
1241 * ALSA leaves material resumption to user space
1242 * we just notify and restart the mixers
1243 */
1244 list_for_each_entry(mixer, &chip->mixer_list, list) {
1245 err = snd_usb_mixer_resume(mixer, reset_resume);
1246 if (err < 0)
1247 goto err_out;
1248 }
1249
1250 list_for_each(p, &chip->midi_list) {
1251 snd_usbmidi_resume(p);
1252 }
1253
1254 out:
1255 if (chip->num_suspended_intf == chip->system_suspend) {
1256 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1257 chip->system_suspend = 0;
1258 }
1259 chip->num_suspended_intf--;
1260
1261 err_out:
1262 atomic_dec(&chip->active); /* allow autopm after this point */
1263 return err;
1264 }
1265
usb_audio_resume(struct usb_interface * intf)1266 static int usb_audio_resume(struct usb_interface *intf)
1267 {
1268 return __usb_audio_resume(intf, false);
1269 }
1270
usb_audio_reset_resume(struct usb_interface * intf)1271 static int usb_audio_reset_resume(struct usb_interface *intf)
1272 {
1273 return __usb_audio_resume(intf, true);
1274 }
1275 #else
1276 #define usb_audio_suspend NULL
1277 #define usb_audio_resume NULL
1278 #define usb_audio_reset_resume NULL
1279 #endif /* CONFIG_PM */
1280
1281 static const struct usb_device_id usb_audio_ids [] = {
1282 #include "quirks-table.h"
1283 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1284 .bInterfaceClass = USB_CLASS_AUDIO,
1285 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1286 { } /* Terminating entry */
1287 };
1288 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1289
1290 /*
1291 * entry point for linux usb interface
1292 */
1293
1294 static struct usb_driver usb_audio_driver = {
1295 .name = "snd-usb-audio",
1296 .probe = usb_audio_probe,
1297 .disconnect = usb_audio_disconnect,
1298 .suspend = usb_audio_suspend,
1299 .resume = usb_audio_resume,
1300 .reset_resume = usb_audio_reset_resume,
1301 .id_table = usb_audio_ids,
1302 .supports_autosuspend = 1,
1303 };
1304
1305 module_usb_driver(usb_audio_driver);
1306