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23#include <linux/bitops.h>
24#include <linux/init.h>
25#include <linux/list.h>
26#include <linux/slab.h>
27#include <linux/string.h>
28#include <linux/ctype.h>
29#include <linux/usb.h>
30#include <linux/moduleparam.h>
31#include <linux/mutex.h>
32#include <linux/usb/audio.h>
33#include <linux/usb/audio-v2.h>
34#include <linux/usb/audio-v3.h>
35#include <linux/module.h>
36
37#include <sound/control.h>
38#include <sound/core.h>
39#include <sound/info.h>
40#include <sound/pcm.h>
41#include <sound/pcm_params.h>
42#include <sound/initval.h>
43
44#include "usbaudio.h"
45#include "card.h"
46#include "midi.h"
47#include "mixer.h"
48#include "proc.h"
49#include "quirks.h"
50#include "endpoint.h"
51#include "helper.h"
52#include "pcm.h"
53#include "format.h"
54#include "power.h"
55#include "stream.h"
56#include "media.h"
57
58MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
59MODULE_DESCRIPTION("USB Audio");
60MODULE_LICENSE("GPL");
61MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
62
63
64static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
65static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
66static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
67
68static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
69static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
70static int device_setup[SNDRV_CARDS];
71static bool ignore_ctl_error;
72static bool autoclock = true;
73static char *quirk_alias[SNDRV_CARDS];
74static char *delayed_register[SNDRV_CARDS];
75static bool implicit_fb[SNDRV_CARDS];
76
77bool snd_usb_use_vmalloc = true;
78bool snd_usb_skip_validation;
79
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.");
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.");
95module_param(autoclock, bool, 0444);
96MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
97module_param_array(quirk_alias, charp, NULL, 0444);
98MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
99module_param_array(delayed_register, charp, NULL, 0444);
100MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
101module_param_array(implicit_fb, bool, NULL, 0444);
102MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode.");
103module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
104MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
105module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
106MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
107
108
109
110
111
112
113static DEFINE_MUTEX(register_mutex);
114static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
115static struct usb_driver usb_audio_driver;
116
117
118
119
120
121static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
122{
123 int idx;
124 struct snd_usb_substream *subs;
125
126 for (idx = 0; idx < 2; idx++) {
127 subs = &as->substream[idx];
128 if (!subs->num_formats)
129 continue;
130 subs->data_endpoint = NULL;
131 subs->sync_endpoint = NULL;
132 }
133}
134
135static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
136{
137 struct usb_device *dev = chip->dev;
138 struct usb_host_interface *alts;
139 struct usb_interface_descriptor *altsd;
140 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
141
142 if (!iface) {
143 dev_err(&dev->dev, "%u:%d : does not exist\n",
144 ctrlif, interface);
145 return -EINVAL;
146 }
147
148 alts = &iface->altsetting[0];
149 altsd = get_iface_desc(alts);
150
151
152
153
154
155 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
156 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
157 interface == 0 &&
158 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
159 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
160 interface = 2;
161 iface = usb_ifnum_to_if(dev, interface);
162 if (!iface)
163 return -EINVAL;
164 alts = &iface->altsetting[0];
165 altsd = get_iface_desc(alts);
166 }
167
168 if (usb_interface_claimed(iface)) {
169 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
170 ctrlif, interface);
171 return -EINVAL;
172 }
173
174 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
175 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
176 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
177 int err = __snd_usbmidi_create(chip->card, iface,
178 &chip->midi_list, NULL,
179 chip->usb_id);
180 if (err < 0) {
181 dev_err(&dev->dev,
182 "%u:%d: cannot create sequencer device\n",
183 ctrlif, interface);
184 return -EINVAL;
185 }
186 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
187
188 return 0;
189 }
190
191 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
192 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
193 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
194 dev_dbg(&dev->dev,
195 "%u:%d: skipping non-supported interface %d\n",
196 ctrlif, interface, altsd->bInterfaceClass);
197
198 return -EINVAL;
199 }
200
201 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
202 dev_err(&dev->dev, "low speed audio streaming not supported\n");
203 return -EINVAL;
204 }
205
206 if (! snd_usb_parse_audio_interface(chip, interface)) {
207 usb_set_interface(dev, interface, 0);
208 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
209 }
210
211 return 0;
212}
213
214
215
216
217static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
218{
219 struct usb_device *dev = chip->dev;
220 struct usb_host_interface *host_iface;
221 struct usb_interface_descriptor *altsd;
222 int i, protocol;
223
224
225 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
226 altsd = get_iface_desc(host_iface);
227 protocol = altsd->bInterfaceProtocol;
228
229 switch (protocol) {
230 default:
231 dev_warn(&dev->dev,
232 "unknown interface protocol %#02x, assuming v1\n",
233 protocol);
234 fallthrough;
235
236 case UAC_VERSION_1: {
237 struct uac1_ac_header_descriptor *h1;
238 int rest_bytes;
239
240 h1 = snd_usb_find_csint_desc(host_iface->extra,
241 host_iface->extralen,
242 NULL, UAC_HEADER);
243 if (!h1 || h1->bLength < sizeof(*h1)) {
244 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
245 return -EINVAL;
246 }
247
248 rest_bytes = (void *)(host_iface->extra +
249 host_iface->extralen) - (void *)h1;
250
251
252 if (rest_bytes <= 0) {
253 dev_err(&dev->dev, "invalid control header\n");
254 return -EINVAL;
255 }
256
257 if (rest_bytes < sizeof(*h1)) {
258 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
259 return -EINVAL;
260 }
261
262 if (!h1->bInCollection) {
263 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
264 return -EINVAL;
265 }
266
267 if (rest_bytes < h1->bLength) {
268 dev_err(&dev->dev, "invalid buffer length (v1)\n");
269 return -EINVAL;
270 }
271
272 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
273 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
274 return -EINVAL;
275 }
276
277 for (i = 0; i < h1->bInCollection; i++)
278 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
279
280 break;
281 }
282
283 case UAC_VERSION_2:
284 case UAC_VERSION_3: {
285 struct usb_interface_assoc_descriptor *assoc =
286 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
287
288 if (!assoc) {
289
290
291
292
293
294 struct usb_interface *iface =
295 usb_ifnum_to_if(dev, ctrlif + 1);
296 if (iface &&
297 iface->intf_assoc &&
298 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
299 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
300 assoc = iface->intf_assoc;
301 }
302
303 if (!assoc) {
304 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
305 return -EINVAL;
306 }
307
308 if (protocol == UAC_VERSION_3) {
309 int badd = assoc->bFunctionSubClass;
310
311 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
312 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
313 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
314 dev_err(&dev->dev,
315 "Unsupported UAC3 BADD profile\n");
316 return -EINVAL;
317 }
318
319 chip->badd_profile = badd;
320 }
321
322 for (i = 0; i < assoc->bInterfaceCount; i++) {
323 int intf = assoc->bFirstInterface + i;
324
325 if (intf != ctrlif)
326 snd_usb_create_stream(chip, ctrlif, intf);
327 }
328
329 break;
330 }
331 }
332
333 return 0;
334}
335
336
337
338
339struct usb_audio_device_name {
340 u32 id;
341 const char *vendor_name;
342 const char *product_name;
343 const char *profile_name;
344};
345
346#define PROFILE_NAME(vid, pid, vendor, product, profile) \
347 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
348 .product_name = (product), .profile_name = (profile) }
349#define DEVICE_NAME(vid, pid, vendor, product) \
350 PROFILE_NAME(vid, pid, vendor, product, NULL)
351
352
353static const struct usb_audio_device_name usb_audio_names[] = {
354
355 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
356 "HP-Thunderbolt-Dock-Audio-Headset"),
357
358 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
359 "HP-Thunderbolt-Dock-Audio-Module"),
360
361
362
363
364
365
366
367 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
368 "Gigabyte-Aorus-Master-Front-Headphone"),
369 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
370 "Gigabyte-Aorus-Master-Main-Audio"),
371
372
373 PROFILE_NAME(0x0414, 0xa002,
374 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
375
376
377 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
378
379 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
380
381 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
382
383
384 PROFILE_NAME(0x0b05, 0x1917,
385 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
386
387 PROFILE_NAME(0x0b05, 0x1918,
388 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
389
390
391 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
392
393 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
394
395 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
396
397
398
399
400
401 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
402 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
403
404
405 PROFILE_NAME(0x0db0, 0x0d64,
406 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
407
408 PROFILE_NAME(0x0db0, 0x543d,
409 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
410
411
412 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
413 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
414
415
416 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
417
418
419 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
420 "Lenovo-ThinkStation-P620-Rear"),
421
422 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
423 "Lenovo-ThinkStation-P620-Main"),
424
425
426 PROFILE_NAME(0x26ce, 0x0a01,
427 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
428
429 { }
430};
431
432static const struct usb_audio_device_name *
433lookup_device_name(u32 id)
434{
435 static const struct usb_audio_device_name *p;
436
437 for (p = usb_audio_names; p->id; p++)
438 if (p->id == id)
439 return p;
440 return NULL;
441}
442
443
444
445
446
447
448
449
450static void snd_usb_audio_free(struct snd_card *card)
451{
452 struct snd_usb_audio *chip = card->private_data;
453
454 snd_usb_endpoint_free_all(chip);
455
456 mutex_destroy(&chip->mutex);
457 if (!atomic_read(&chip->shutdown))
458 dev_set_drvdata(&chip->dev->dev, NULL);
459}
460
461static void usb_audio_make_shortname(struct usb_device *dev,
462 struct snd_usb_audio *chip,
463 const struct snd_usb_audio_quirk *quirk)
464{
465 struct snd_card *card = chip->card;
466 const struct usb_audio_device_name *preset;
467 const char *s = NULL;
468
469 preset = lookup_device_name(chip->usb_id);
470 if (preset && preset->product_name)
471 s = preset->product_name;
472 else if (quirk && quirk->product_name)
473 s = quirk->product_name;
474 if (s && *s) {
475 strlcpy(card->shortname, s, sizeof(card->shortname));
476 return;
477 }
478
479
480 if (!dev->descriptor.iProduct ||
481 usb_string(dev, dev->descriptor.iProduct,
482 card->shortname, sizeof(card->shortname)) <= 0) {
483
484 sprintf(card->shortname, "USB Device %#04x:%#04x",
485 USB_ID_VENDOR(chip->usb_id),
486 USB_ID_PRODUCT(chip->usb_id));
487 }
488
489 strim(card->shortname);
490}
491
492static void usb_audio_make_longname(struct usb_device *dev,
493 struct snd_usb_audio *chip,
494 const struct snd_usb_audio_quirk *quirk)
495{
496 struct snd_card *card = chip->card;
497 const struct usb_audio_device_name *preset;
498 const char *s = NULL;
499 int len;
500
501 preset = lookup_device_name(chip->usb_id);
502
503
504 if (preset && preset->profile_name)
505 s = preset->profile_name;
506 if (s && *s) {
507 strlcpy(card->longname, s, sizeof(card->longname));
508 return;
509 }
510
511 if (preset && preset->vendor_name)
512 s = preset->vendor_name;
513 else if (quirk && quirk->vendor_name)
514 s = quirk->vendor_name;
515 if (s && *s) {
516 len = strlcpy(card->longname, s, sizeof(card->longname));
517 } else {
518
519 if (dev->descriptor.iManufacturer)
520 len = usb_string(dev, dev->descriptor.iManufacturer,
521 card->longname, sizeof(card->longname));
522 else
523 len = 0;
524
525 }
526 if (len > 0) {
527 strim(card->longname);
528 if (*card->longname)
529 strlcat(card->longname, " ", sizeof(card->longname));
530 }
531
532 strlcat(card->longname, card->shortname, sizeof(card->longname));
533
534 len = strlcat(card->longname, " at ", sizeof(card->longname));
535
536 if (len < sizeof(card->longname))
537 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
538
539 switch (snd_usb_get_speed(dev)) {
540 case USB_SPEED_LOW:
541 strlcat(card->longname, ", low speed", sizeof(card->longname));
542 break;
543 case USB_SPEED_FULL:
544 strlcat(card->longname, ", full speed", sizeof(card->longname));
545 break;
546 case USB_SPEED_HIGH:
547 strlcat(card->longname, ", high speed", sizeof(card->longname));
548 break;
549 case USB_SPEED_SUPER:
550 strlcat(card->longname, ", super speed", sizeof(card->longname));
551 break;
552 case USB_SPEED_SUPER_PLUS:
553 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
554 break;
555 default:
556 break;
557 }
558}
559
560
561
562
563static int snd_usb_audio_create(struct usb_interface *intf,
564 struct usb_device *dev, int idx,
565 const struct snd_usb_audio_quirk *quirk,
566 unsigned int usb_id,
567 struct snd_usb_audio **rchip)
568{
569 struct snd_card *card;
570 struct snd_usb_audio *chip;
571 int err;
572 char component[14];
573
574 *rchip = NULL;
575
576 switch (snd_usb_get_speed(dev)) {
577 case USB_SPEED_LOW:
578 case USB_SPEED_FULL:
579 case USB_SPEED_HIGH:
580 case USB_SPEED_WIRELESS:
581 case USB_SPEED_SUPER:
582 case USB_SPEED_SUPER_PLUS:
583 break;
584 default:
585 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
586 return -ENXIO;
587 }
588
589 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
590 sizeof(*chip), &card);
591 if (err < 0) {
592 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
593 return err;
594 }
595
596 chip = card->private_data;
597 mutex_init(&chip->mutex);
598 init_waitqueue_head(&chip->shutdown_wait);
599 chip->index = idx;
600 chip->dev = dev;
601 chip->card = card;
602 chip->setup = device_setup[idx];
603 chip->generic_implicit_fb = implicit_fb[idx];
604 chip->autoclock = autoclock;
605 atomic_set(&chip->active, 1);
606 atomic_set(&chip->usage_count, 0);
607 atomic_set(&chip->shutdown, 0);
608
609 chip->usb_id = usb_id;
610 INIT_LIST_HEAD(&chip->pcm_list);
611 INIT_LIST_HEAD(&chip->ep_list);
612 INIT_LIST_HEAD(&chip->iface_ref_list);
613 INIT_LIST_HEAD(&chip->midi_list);
614 INIT_LIST_HEAD(&chip->mixer_list);
615
616 card->private_free = snd_usb_audio_free;
617
618 strcpy(card->driver, "USB-Audio");
619 sprintf(component, "USB%04x:%04x",
620 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
621 snd_component_add(card, component);
622
623 usb_audio_make_shortname(dev, chip, quirk);
624 usb_audio_make_longname(dev, chip, quirk);
625
626 snd_usb_audio_create_proc(chip);
627
628 *rchip = chip;
629 return 0;
630}
631
632
633static bool get_alias_id(struct usb_device *dev, unsigned int *id)
634{
635 int i;
636 unsigned int src, dst;
637
638 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
639 if (!quirk_alias[i] ||
640 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
641 src != *id)
642 continue;
643 dev_info(&dev->dev,
644 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
645 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
646 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
647 *id = dst;
648 return true;
649 }
650
651 return false;
652}
653
654static bool check_delayed_register_option(struct snd_usb_audio *chip, int iface)
655{
656 int i;
657 unsigned int id, inum;
658
659 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
660 if (delayed_register[i] &&
661 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
662 id == chip->usb_id)
663 return inum != iface;
664 }
665
666 return false;
667}
668
669static const struct usb_device_id usb_audio_ids[];
670
671
672static const struct snd_usb_audio_quirk *
673get_alias_quirk(struct usb_device *dev, unsigned int id)
674{
675 const struct usb_device_id *p;
676
677 for (p = usb_audio_ids; p->match_flags; p++) {
678
679 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
680 USB_DEVICE_ID_MATCH_DEVICE &&
681 p->idVendor == USB_ID_VENDOR(id) &&
682 p->idProduct == USB_ID_PRODUCT(id))
683 return (const struct snd_usb_audio_quirk *)p->driver_info;
684 }
685
686 return NULL;
687}
688
689
690
691
692
693
694
695
696
697
698
699static int usb_audio_probe(struct usb_interface *intf,
700 const struct usb_device_id *usb_id)
701{
702 struct usb_device *dev = interface_to_usbdev(intf);
703 const struct snd_usb_audio_quirk *quirk =
704 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
705 struct snd_usb_audio *chip;
706 int i, err;
707 struct usb_host_interface *alts;
708 int ifnum;
709 u32 id;
710
711 alts = &intf->altsetting[0];
712 ifnum = get_iface_desc(alts)->bInterfaceNumber;
713 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
714 le16_to_cpu(dev->descriptor.idProduct));
715 if (get_alias_id(dev, &id))
716 quirk = get_alias_quirk(dev, id);
717 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
718 return -ENXIO;
719
720 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
721 if (err < 0)
722 return err;
723
724
725
726
727
728
729 chip = NULL;
730 mutex_lock(®ister_mutex);
731 for (i = 0; i < SNDRV_CARDS; i++) {
732 if (usb_chip[i] && usb_chip[i]->dev == dev) {
733 if (atomic_read(&usb_chip[i]->shutdown)) {
734 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
735 err = -EIO;
736 goto __error;
737 }
738 chip = usb_chip[i];
739 atomic_inc(&chip->active);
740 break;
741 }
742 }
743 if (! chip) {
744 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
745 if (err < 0)
746 goto __error;
747
748
749
750
751 for (i = 0; i < SNDRV_CARDS; i++)
752 if (!usb_chip[i] &&
753 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
754 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
755 if (enable[i]) {
756 err = snd_usb_audio_create(intf, dev, i, quirk,
757 id, &chip);
758 if (err < 0)
759 goto __error;
760 break;
761 } else if (vid[i] != -1 || pid[i] != -1) {
762 dev_info(&dev->dev,
763 "device (%04x:%04x) is disabled\n",
764 USB_ID_VENDOR(id),
765 USB_ID_PRODUCT(id));
766 err = -ENOENT;
767 goto __error;
768 }
769 }
770 if (!chip) {
771 dev_err(&dev->dev, "no available usb audio device\n");
772 err = -ENODEV;
773 goto __error;
774 }
775 }
776
777 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
778 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
779 err = -EINVAL;
780 goto __error;
781 }
782
783 dev_set_drvdata(&dev->dev, chip);
784
785
786
787
788
789
790 if (!chip->ctrl_intf)
791 chip->ctrl_intf = alts;
792
793 chip->txfr_quirk = 0;
794 err = 1;
795 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
796
797 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
798 if (err < 0)
799 goto __error;
800 }
801
802 if (err > 0) {
803
804 err = snd_usb_create_streams(chip, ifnum);
805 if (err < 0)
806 goto __error;
807 err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error);
808 if (err < 0)
809 goto __error;
810 }
811
812 if (chip->need_delayed_register) {
813 dev_info(&dev->dev,
814 "Found post-registration device assignment: %08x:%02x\n",
815 chip->usb_id, ifnum);
816 chip->need_delayed_register = false;
817 }
818
819
820
821
822 if (!snd_usb_registration_quirk(chip, ifnum) &&
823 !check_delayed_register_option(chip, ifnum)) {
824 err = snd_card_register(chip->card);
825 if (err < 0)
826 goto __error;
827 }
828
829 if (quirk && quirk->shares_media_device) {
830
831 snd_media_device_create(chip, intf);
832 }
833
834 usb_chip[chip->index] = chip;
835 chip->intf[chip->num_interfaces] = intf;
836 chip->num_interfaces++;
837 usb_set_intfdata(intf, chip);
838 atomic_dec(&chip->active);
839 mutex_unlock(®ister_mutex);
840 return 0;
841
842 __error:
843 if (chip) {
844
845
846
847 atomic_dec(&chip->active);
848 if (!chip->num_interfaces)
849 snd_card_free(chip->card);
850 }
851 mutex_unlock(®ister_mutex);
852 return err;
853}
854
855
856
857
858
859static void usb_audio_disconnect(struct usb_interface *intf)
860{
861 struct snd_usb_audio *chip = usb_get_intfdata(intf);
862 struct snd_card *card;
863 struct list_head *p;
864
865 if (chip == (void *)-1L)
866 return;
867
868 card = chip->card;
869
870 mutex_lock(®ister_mutex);
871 if (atomic_inc_return(&chip->shutdown) == 1) {
872 struct snd_usb_stream *as;
873 struct snd_usb_endpoint *ep;
874 struct usb_mixer_interface *mixer;
875
876
877
878
879 wait_event(chip->shutdown_wait,
880 !atomic_read(&chip->usage_count));
881 snd_card_disconnect(card);
882
883 list_for_each_entry(as, &chip->pcm_list, list) {
884 snd_usb_stream_disconnect(as);
885 }
886
887 list_for_each_entry(ep, &chip->ep_list, list) {
888 snd_usb_endpoint_release(ep);
889 }
890
891 list_for_each(p, &chip->midi_list) {
892 snd_usbmidi_disconnect(p);
893 }
894
895
896
897
898
899
900 snd_media_device_delete(chip);
901
902
903 list_for_each_entry(mixer, &chip->mixer_list, list) {
904 snd_usb_mixer_disconnect(mixer);
905 }
906 }
907
908 chip->num_interfaces--;
909 if (chip->num_interfaces <= 0) {
910 usb_chip[chip->index] = NULL;
911 mutex_unlock(®ister_mutex);
912 snd_card_free_when_closed(card);
913 } else {
914 mutex_unlock(®ister_mutex);
915 }
916}
917
918
919int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
920{
921 int err;
922
923 atomic_inc(&chip->usage_count);
924 if (atomic_read(&chip->shutdown)) {
925 err = -EIO;
926 goto error;
927 }
928 err = snd_usb_autoresume(chip);
929 if (err < 0)
930 goto error;
931 return 0;
932
933 error:
934 if (atomic_dec_and_test(&chip->usage_count))
935 wake_up(&chip->shutdown_wait);
936 return err;
937}
938
939
940void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
941{
942 snd_usb_autosuspend(chip);
943 if (atomic_dec_and_test(&chip->usage_count))
944 wake_up(&chip->shutdown_wait);
945}
946
947#ifdef CONFIG_PM
948
949int snd_usb_autoresume(struct snd_usb_audio *chip)
950{
951 int i, err;
952
953 if (atomic_read(&chip->shutdown))
954 return -EIO;
955 if (atomic_inc_return(&chip->active) != 1)
956 return 0;
957
958 for (i = 0; i < chip->num_interfaces; i++) {
959 err = usb_autopm_get_interface(chip->intf[i]);
960 if (err < 0) {
961
962 while (--i >= 0)
963 usb_autopm_put_interface(chip->intf[i]);
964 atomic_dec(&chip->active);
965 return err;
966 }
967 }
968 return 0;
969}
970
971void snd_usb_autosuspend(struct snd_usb_audio *chip)
972{
973 int i;
974
975 if (atomic_read(&chip->shutdown))
976 return;
977 if (!atomic_dec_and_test(&chip->active))
978 return;
979
980 for (i = 0; i < chip->num_interfaces; i++)
981 usb_autopm_put_interface(chip->intf[i]);
982}
983
984static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
985{
986 struct snd_usb_audio *chip = usb_get_intfdata(intf);
987 struct snd_usb_stream *as;
988 struct snd_usb_endpoint *ep;
989 struct usb_mixer_interface *mixer;
990 struct list_head *p;
991
992 if (chip == (void *)-1L)
993 return 0;
994
995 if (!chip->num_suspended_intf++) {
996 list_for_each_entry(as, &chip->pcm_list, list)
997 snd_usb_pcm_suspend(as);
998 list_for_each_entry(ep, &chip->ep_list, list)
999 snd_usb_endpoint_suspend(ep);
1000 list_for_each(p, &chip->midi_list)
1001 snd_usbmidi_suspend(p);
1002 list_for_each_entry(mixer, &chip->mixer_list, list)
1003 snd_usb_mixer_suspend(mixer);
1004 }
1005
1006 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1007 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1008 chip->system_suspend = chip->num_suspended_intf;
1009 }
1010
1011 return 0;
1012}
1013
1014static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume)
1015{
1016 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1017 struct snd_usb_stream *as;
1018 struct usb_mixer_interface *mixer;
1019 struct list_head *p;
1020 int err = 0;
1021
1022 if (chip == (void *)-1L)
1023 return 0;
1024
1025 atomic_inc(&chip->active);
1026 if (chip->num_suspended_intf > 1)
1027 goto out;
1028
1029 list_for_each_entry(as, &chip->pcm_list, list) {
1030 err = snd_usb_pcm_resume(as);
1031 if (err < 0)
1032 goto err_out;
1033 }
1034
1035
1036
1037
1038
1039 list_for_each_entry(mixer, &chip->mixer_list, list) {
1040 err = snd_usb_mixer_resume(mixer, reset_resume);
1041 if (err < 0)
1042 goto err_out;
1043 }
1044
1045 list_for_each(p, &chip->midi_list) {
1046 snd_usbmidi_resume(p);
1047 }
1048
1049 out:
1050 if (chip->num_suspended_intf == chip->system_suspend) {
1051 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1052 chip->system_suspend = 0;
1053 }
1054 chip->num_suspended_intf--;
1055
1056err_out:
1057 atomic_dec(&chip->active);
1058 return err;
1059}
1060
1061static int usb_audio_resume(struct usb_interface *intf)
1062{
1063 return __usb_audio_resume(intf, false);
1064}
1065
1066static int usb_audio_reset_resume(struct usb_interface *intf)
1067{
1068 return __usb_audio_resume(intf, true);
1069}
1070#else
1071#define usb_audio_suspend NULL
1072#define usb_audio_resume NULL
1073#define usb_audio_reset_resume NULL
1074#endif
1075
1076static const struct usb_device_id usb_audio_ids [] = {
1077#include "quirks-table.h"
1078 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1079 .bInterfaceClass = USB_CLASS_AUDIO,
1080 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1081 { }
1082};
1083MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1084
1085
1086
1087
1088
1089static struct usb_driver usb_audio_driver = {
1090 .name = "snd-usb-audio",
1091 .probe = usb_audio_probe,
1092 .disconnect = usb_audio_disconnect,
1093 .suspend = usb_audio_suspend,
1094 .resume = usb_audio_resume,
1095 .reset_resume = usb_audio_reset_resume,
1096 .id_table = usb_audio_ids,
1097 .supports_autosuspend = 1,
1098};
1099
1100module_usb_driver(usb_audio_driver);
1101