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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");
61
62static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
63static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
64static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
65
66static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
67static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
68static int device_setup[SNDRV_CARDS];
69static bool ignore_ctl_error;
70static bool autoclock = true;
71static bool lowlatency = true;
72static char *quirk_alias[SNDRV_CARDS];
73static char *delayed_register[SNDRV_CARDS];
74static bool implicit_fb[SNDRV_CARDS];
75static unsigned int quirk_flags[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(lowlatency, bool, 0444);
98MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes).");
99module_param_array(quirk_alias, charp, NULL, 0444);
100MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
101module_param_array(delayed_register, charp, NULL, 0444);
102MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
103module_param_array(implicit_fb, bool, NULL, 0444);
104MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode.");
105module_param_array(quirk_flags, uint, NULL, 0444);
106MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags.");
107module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
108MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
109module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
110MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
111
112
113
114
115
116
117static DEFINE_MUTEX(register_mutex);
118static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
119static struct usb_driver usb_audio_driver;
120
121
122
123
124
125static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
126{
127 int idx;
128 struct snd_usb_substream *subs;
129
130 for (idx = 0; idx < 2; idx++) {
131 subs = &as->substream[idx];
132 if (!subs->num_formats)
133 continue;
134 subs->data_endpoint = NULL;
135 subs->sync_endpoint = NULL;
136 }
137}
138
139static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
140{
141 struct usb_device *dev = chip->dev;
142 struct usb_host_interface *alts;
143 struct usb_interface_descriptor *altsd;
144 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
145
146 if (!iface) {
147 dev_err(&dev->dev, "%u:%d : does not exist\n",
148 ctrlif, interface);
149 return -EINVAL;
150 }
151
152 alts = &iface->altsetting[0];
153 altsd = get_iface_desc(alts);
154
155
156
157
158
159 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
160 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
161 interface == 0 &&
162 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
163 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
164 interface = 2;
165 iface = usb_ifnum_to_if(dev, interface);
166 if (!iface)
167 return -EINVAL;
168 alts = &iface->altsetting[0];
169 altsd = get_iface_desc(alts);
170 }
171
172 if (usb_interface_claimed(iface)) {
173 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
174 ctrlif, interface);
175 return -EINVAL;
176 }
177
178 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
179 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
180 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
181 int err = __snd_usbmidi_create(chip->card, iface,
182 &chip->midi_list, NULL,
183 chip->usb_id);
184 if (err < 0) {
185 dev_err(&dev->dev,
186 "%u:%d: cannot create sequencer device\n",
187 ctrlif, interface);
188 return -EINVAL;
189 }
190 return usb_driver_claim_interface(&usb_audio_driver, iface,
191 USB_AUDIO_IFACE_UNUSED);
192 }
193
194 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
195 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
196 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
197 dev_dbg(&dev->dev,
198 "%u:%d: skipping non-supported interface %d\n",
199 ctrlif, interface, altsd->bInterfaceClass);
200
201 return -EINVAL;
202 }
203
204 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
205 dev_err(&dev->dev, "low speed audio streaming not supported\n");
206 return -EINVAL;
207 }
208
209 if (! snd_usb_parse_audio_interface(chip, interface)) {
210 usb_set_interface(dev, interface, 0);
211 return usb_driver_claim_interface(&usb_audio_driver, iface,
212 USB_AUDIO_IFACE_UNUSED);
213 }
214
215 return 0;
216}
217
218
219
220
221static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
222{
223 struct usb_device *dev = chip->dev;
224 struct usb_host_interface *host_iface;
225 struct usb_interface_descriptor *altsd;
226 int i, protocol;
227
228
229 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
230 altsd = get_iface_desc(host_iface);
231 protocol = altsd->bInterfaceProtocol;
232
233 switch (protocol) {
234 default:
235 dev_warn(&dev->dev,
236 "unknown interface protocol %#02x, assuming v1\n",
237 protocol);
238 fallthrough;
239
240 case UAC_VERSION_1: {
241 struct uac1_ac_header_descriptor *h1;
242 int rest_bytes;
243
244 h1 = snd_usb_find_csint_desc(host_iface->extra,
245 host_iface->extralen,
246 NULL, UAC_HEADER);
247 if (!h1 || h1->bLength < sizeof(*h1)) {
248 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
249 return -EINVAL;
250 }
251
252 rest_bytes = (void *)(host_iface->extra +
253 host_iface->extralen) - (void *)h1;
254
255
256 if (rest_bytes <= 0) {
257 dev_err(&dev->dev, "invalid control header\n");
258 return -EINVAL;
259 }
260
261 if (rest_bytes < sizeof(*h1)) {
262 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
263 return -EINVAL;
264 }
265
266 if (!h1->bInCollection) {
267 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
268 return -EINVAL;
269 }
270
271 if (rest_bytes < h1->bLength) {
272 dev_err(&dev->dev, "invalid buffer length (v1)\n");
273 return -EINVAL;
274 }
275
276 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
277 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
278 return -EINVAL;
279 }
280
281 for (i = 0; i < h1->bInCollection; i++)
282 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
283
284 break;
285 }
286
287 case UAC_VERSION_2:
288 case UAC_VERSION_3: {
289 struct usb_interface_assoc_descriptor *assoc =
290 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
291
292 if (!assoc) {
293
294
295
296
297
298 struct usb_interface *iface =
299 usb_ifnum_to_if(dev, ctrlif + 1);
300 if (iface &&
301 iface->intf_assoc &&
302 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
303 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
304 assoc = iface->intf_assoc;
305 }
306
307 if (!assoc) {
308 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
309 return -EINVAL;
310 }
311
312 if (protocol == UAC_VERSION_3) {
313 int badd = assoc->bFunctionSubClass;
314
315 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
316 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
317 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
318 dev_err(&dev->dev,
319 "Unsupported UAC3 BADD profile\n");
320 return -EINVAL;
321 }
322
323 chip->badd_profile = badd;
324 }
325
326 for (i = 0; i < assoc->bInterfaceCount; i++) {
327 int intf = assoc->bFirstInterface + i;
328
329 if (intf != ctrlif)
330 snd_usb_create_stream(chip, ctrlif, intf);
331 }
332
333 break;
334 }
335 }
336
337 return 0;
338}
339
340
341
342
343struct usb_audio_device_name {
344 u32 id;
345 const char *vendor_name;
346 const char *product_name;
347 const char *profile_name;
348};
349
350#define PROFILE_NAME(vid, pid, vendor, product, profile) \
351 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
352 .product_name = (product), .profile_name = (profile) }
353#define DEVICE_NAME(vid, pid, vendor, product) \
354 PROFILE_NAME(vid, pid, vendor, product, NULL)
355
356
357static const struct usb_audio_device_name usb_audio_names[] = {
358
359 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
360 "HP-Thunderbolt-Dock-Audio-Headset"),
361
362 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
363 "HP-Thunderbolt-Dock-Audio-Module"),
364
365
366
367
368
369
370
371 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
372 "Gigabyte-Aorus-Master-Front-Headphone"),
373 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
374 "Gigabyte-Aorus-Master-Main-Audio"),
375
376
377 PROFILE_NAME(0x0414, 0xa002,
378 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
379
380
381 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
382
383 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
384
385 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
386
387 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
388 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
389
390
391 PROFILE_NAME(0x0b05, 0x1917,
392 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
393
394 PROFILE_NAME(0x0b05, 0x1918,
395 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
396
397
398 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
399
400 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
401
402 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
403
404
405
406
407
408 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
409 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
410
411
412 PROFILE_NAME(0x0db0, 0x0d64,
413 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
414
415 PROFILE_NAME(0x0db0, 0x543d,
416 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
417
418 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
419
420
421 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
422 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
423
424
425 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
426
427
428 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
429 "Lenovo-ThinkStation-P620-Rear"),
430
431 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
432 "Lenovo-ThinkStation-P620-Main"),
433
434
435 PROFILE_NAME(0x26ce, 0x0a01,
436 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
437
438 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
439 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
440 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
441 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
442 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
443 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
444 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
445 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
446 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
447 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
448 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
449 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
450 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
451 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
452 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
453
454 { }
455};
456
457static const struct usb_audio_device_name *
458lookup_device_name(u32 id)
459{
460 static const struct usb_audio_device_name *p;
461
462 for (p = usb_audio_names; p->id; p++)
463 if (p->id == id)
464 return p;
465 return NULL;
466}
467
468
469
470
471
472
473
474
475static void snd_usb_audio_free(struct snd_card *card)
476{
477 struct snd_usb_audio *chip = card->private_data;
478
479 snd_usb_endpoint_free_all(chip);
480
481 mutex_destroy(&chip->mutex);
482 if (!atomic_read(&chip->shutdown))
483 dev_set_drvdata(&chip->dev->dev, NULL);
484}
485
486static void usb_audio_make_shortname(struct usb_device *dev,
487 struct snd_usb_audio *chip,
488 const struct snd_usb_audio_quirk *quirk)
489{
490 struct snd_card *card = chip->card;
491 const struct usb_audio_device_name *preset;
492 const char *s = NULL;
493
494 preset = lookup_device_name(chip->usb_id);
495 if (preset && preset->product_name)
496 s = preset->product_name;
497 else if (quirk && quirk->product_name)
498 s = quirk->product_name;
499 if (s && *s) {
500 strscpy(card->shortname, s, sizeof(card->shortname));
501 return;
502 }
503
504
505 if (!dev->descriptor.iProduct ||
506 usb_string(dev, dev->descriptor.iProduct,
507 card->shortname, sizeof(card->shortname)) <= 0) {
508
509 sprintf(card->shortname, "USB Device %#04x:%#04x",
510 USB_ID_VENDOR(chip->usb_id),
511 USB_ID_PRODUCT(chip->usb_id));
512 }
513
514 strim(card->shortname);
515}
516
517static void usb_audio_make_longname(struct usb_device *dev,
518 struct snd_usb_audio *chip,
519 const struct snd_usb_audio_quirk *quirk)
520{
521 struct snd_card *card = chip->card;
522 const struct usb_audio_device_name *preset;
523 const char *s = NULL;
524 int len;
525
526 preset = lookup_device_name(chip->usb_id);
527
528
529 if (preset && preset->profile_name)
530 s = preset->profile_name;
531 if (s && *s) {
532 strscpy(card->longname, s, sizeof(card->longname));
533 return;
534 }
535
536 if (preset && preset->vendor_name)
537 s = preset->vendor_name;
538 else if (quirk && quirk->vendor_name)
539 s = quirk->vendor_name;
540 *card->longname = 0;
541 if (s && *s) {
542 strscpy(card->longname, s, sizeof(card->longname));
543 } else {
544
545 if (dev->descriptor.iManufacturer)
546 usb_string(dev, dev->descriptor.iManufacturer,
547 card->longname, sizeof(card->longname));
548
549 }
550 if (*card->longname) {
551 strim(card->longname);
552 if (*card->longname)
553 strlcat(card->longname, " ", sizeof(card->longname));
554 }
555
556 strlcat(card->longname, card->shortname, sizeof(card->longname));
557
558 len = strlcat(card->longname, " at ", sizeof(card->longname));
559
560 if (len < sizeof(card->longname))
561 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
562
563 switch (snd_usb_get_speed(dev)) {
564 case USB_SPEED_LOW:
565 strlcat(card->longname, ", low speed", sizeof(card->longname));
566 break;
567 case USB_SPEED_FULL:
568 strlcat(card->longname, ", full speed", sizeof(card->longname));
569 break;
570 case USB_SPEED_HIGH:
571 strlcat(card->longname, ", high speed", sizeof(card->longname));
572 break;
573 case USB_SPEED_SUPER:
574 strlcat(card->longname, ", super speed", sizeof(card->longname));
575 break;
576 case USB_SPEED_SUPER_PLUS:
577 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
578 break;
579 default:
580 break;
581 }
582}
583
584
585
586
587static int snd_usb_audio_create(struct usb_interface *intf,
588 struct usb_device *dev, int idx,
589 const struct snd_usb_audio_quirk *quirk,
590 unsigned int usb_id,
591 struct snd_usb_audio **rchip)
592{
593 struct snd_card *card;
594 struct snd_usb_audio *chip;
595 int err;
596 char component[14];
597
598 *rchip = NULL;
599
600 switch (snd_usb_get_speed(dev)) {
601 case USB_SPEED_LOW:
602 case USB_SPEED_FULL:
603 case USB_SPEED_HIGH:
604 case USB_SPEED_WIRELESS:
605 case USB_SPEED_SUPER:
606 case USB_SPEED_SUPER_PLUS:
607 break;
608 default:
609 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
610 return -ENXIO;
611 }
612
613 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
614 sizeof(*chip), &card);
615 if (err < 0) {
616 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
617 return err;
618 }
619
620 chip = card->private_data;
621 mutex_init(&chip->mutex);
622 init_waitqueue_head(&chip->shutdown_wait);
623 chip->index = idx;
624 chip->dev = dev;
625 chip->card = card;
626 chip->setup = device_setup[idx];
627 chip->generic_implicit_fb = implicit_fb[idx];
628 chip->autoclock = autoclock;
629 chip->lowlatency = lowlatency;
630 atomic_set(&chip->active, 1);
631 atomic_set(&chip->usage_count, 0);
632 atomic_set(&chip->shutdown, 0);
633
634 chip->usb_id = usb_id;
635 INIT_LIST_HEAD(&chip->pcm_list);
636 INIT_LIST_HEAD(&chip->ep_list);
637 INIT_LIST_HEAD(&chip->iface_ref_list);
638 INIT_LIST_HEAD(&chip->midi_list);
639 INIT_LIST_HEAD(&chip->mixer_list);
640
641 if (quirk_flags[idx])
642 chip->quirk_flags = quirk_flags[idx];
643 else
644 snd_usb_init_quirk_flags(chip);
645
646 card->private_free = snd_usb_audio_free;
647
648 strcpy(card->driver, "USB-Audio");
649 sprintf(component, "USB%04x:%04x",
650 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
651 snd_component_add(card, component);
652
653 usb_audio_make_shortname(dev, chip, quirk);
654 usb_audio_make_longname(dev, chip, quirk);
655
656 snd_usb_audio_create_proc(chip);
657
658 *rchip = chip;
659 return 0;
660}
661
662
663static bool get_alias_id(struct usb_device *dev, unsigned int *id)
664{
665 int i;
666 unsigned int src, dst;
667
668 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
669 if (!quirk_alias[i] ||
670 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
671 src != *id)
672 continue;
673 dev_info(&dev->dev,
674 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
675 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
676 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
677 *id = dst;
678 return true;
679 }
680
681 return false;
682}
683
684static bool check_delayed_register_option(struct snd_usb_audio *chip, int iface)
685{
686 int i;
687 unsigned int id, inum;
688
689 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
690 if (delayed_register[i] &&
691 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
692 id == chip->usb_id)
693 return inum != iface;
694 }
695
696 return false;
697}
698
699static const struct usb_device_id usb_audio_ids[];
700
701
702static const struct snd_usb_audio_quirk *
703get_alias_quirk(struct usb_device *dev, unsigned int id)
704{
705 const struct usb_device_id *p;
706
707 for (p = usb_audio_ids; p->match_flags; p++) {
708
709 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
710 USB_DEVICE_ID_MATCH_DEVICE &&
711 p->idVendor == USB_ID_VENDOR(id) &&
712 p->idProduct == USB_ID_PRODUCT(id))
713 return (const struct snd_usb_audio_quirk *)p->driver_info;
714 }
715
716 return NULL;
717}
718
719
720
721
722
723
724
725
726
727
728
729static int usb_audio_probe(struct usb_interface *intf,
730 const struct usb_device_id *usb_id)
731{
732 struct usb_device *dev = interface_to_usbdev(intf);
733 const struct snd_usb_audio_quirk *quirk =
734 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
735 struct snd_usb_audio *chip;
736 int i, err;
737 struct usb_host_interface *alts;
738 int ifnum;
739 u32 id;
740
741 alts = &intf->altsetting[0];
742 ifnum = get_iface_desc(alts)->bInterfaceNumber;
743 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
744 le16_to_cpu(dev->descriptor.idProduct));
745 if (get_alias_id(dev, &id))
746 quirk = get_alias_quirk(dev, id);
747 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
748 return -ENXIO;
749 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
750 return -ENODEV;
751
752 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
753 if (err < 0)
754 return err;
755
756
757
758
759
760
761 chip = NULL;
762 mutex_lock(®ister_mutex);
763 for (i = 0; i < SNDRV_CARDS; i++) {
764 if (usb_chip[i] && usb_chip[i]->dev == dev) {
765 if (atomic_read(&usb_chip[i]->shutdown)) {
766 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
767 err = -EIO;
768 goto __error;
769 }
770 chip = usb_chip[i];
771 atomic_inc(&chip->active);
772 break;
773 }
774 }
775 if (! chip) {
776 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
777 if (err < 0)
778 goto __error;
779
780
781
782
783 for (i = 0; i < SNDRV_CARDS; i++)
784 if (!usb_chip[i] &&
785 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
786 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
787 if (enable[i]) {
788 err = snd_usb_audio_create(intf, dev, i, quirk,
789 id, &chip);
790 if (err < 0)
791 goto __error;
792 break;
793 } else if (vid[i] != -1 || pid[i] != -1) {
794 dev_info(&dev->dev,
795 "device (%04x:%04x) is disabled\n",
796 USB_ID_VENDOR(id),
797 USB_ID_PRODUCT(id));
798 err = -ENOENT;
799 goto __error;
800 }
801 }
802 if (!chip) {
803 dev_err(&dev->dev, "no available usb audio device\n");
804 err = -ENODEV;
805 goto __error;
806 }
807 }
808
809 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
810 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
811 err = -EINVAL;
812 goto __error;
813 }
814
815 dev_set_drvdata(&dev->dev, chip);
816
817 if (ignore_ctl_error)
818 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
819
820 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
821 usb_disable_autosuspend(interface_to_usbdev(intf));
822
823
824
825
826
827
828 if (!chip->ctrl_intf)
829 chip->ctrl_intf = alts;
830
831 err = 1;
832 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
833
834 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
835 if (err < 0)
836 goto __error;
837 }
838
839 if (err > 0) {
840
841 err = snd_usb_create_streams(chip, ifnum);
842 if (err < 0)
843 goto __error;
844 err = snd_usb_create_mixer(chip, ifnum);
845 if (err < 0)
846 goto __error;
847 }
848
849 if (chip->need_delayed_register) {
850 dev_info(&dev->dev,
851 "Found post-registration device assignment: %08x:%02x\n",
852 chip->usb_id, ifnum);
853 chip->need_delayed_register = false;
854 }
855
856
857
858
859 if (!snd_usb_registration_quirk(chip, ifnum) &&
860 !check_delayed_register_option(chip, ifnum)) {
861 err = snd_card_register(chip->card);
862 if (err < 0)
863 goto __error;
864 }
865
866 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
867
868 snd_media_device_create(chip, intf);
869 }
870
871 if (quirk)
872 chip->quirk_type = quirk->type;
873
874 usb_chip[chip->index] = chip;
875 chip->intf[chip->num_interfaces] = intf;
876 chip->num_interfaces++;
877 usb_set_intfdata(intf, chip);
878 atomic_dec(&chip->active);
879 mutex_unlock(®ister_mutex);
880 return 0;
881
882 __error:
883 if (chip) {
884
885
886
887 atomic_dec(&chip->active);
888 if (!chip->num_interfaces)
889 snd_card_free(chip->card);
890 }
891 mutex_unlock(®ister_mutex);
892 return err;
893}
894
895
896
897
898
899static void usb_audio_disconnect(struct usb_interface *intf)
900{
901 struct snd_usb_audio *chip = usb_get_intfdata(intf);
902 struct snd_card *card;
903 struct list_head *p;
904
905 if (chip == USB_AUDIO_IFACE_UNUSED)
906 return;
907
908 card = chip->card;
909
910 mutex_lock(®ister_mutex);
911 if (atomic_inc_return(&chip->shutdown) == 1) {
912 struct snd_usb_stream *as;
913 struct snd_usb_endpoint *ep;
914 struct usb_mixer_interface *mixer;
915
916
917
918
919 wait_event(chip->shutdown_wait,
920 !atomic_read(&chip->usage_count));
921 snd_card_disconnect(card);
922
923 list_for_each_entry(as, &chip->pcm_list, list) {
924 snd_usb_stream_disconnect(as);
925 }
926
927 list_for_each_entry(ep, &chip->ep_list, list) {
928 snd_usb_endpoint_release(ep);
929 }
930
931 list_for_each(p, &chip->midi_list) {
932 snd_usbmidi_disconnect(p);
933 }
934
935
936
937
938
939
940 snd_media_device_delete(chip);
941
942
943 list_for_each_entry(mixer, &chip->mixer_list, list) {
944 snd_usb_mixer_disconnect(mixer);
945 }
946 }
947
948 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
949 usb_enable_autosuspend(interface_to_usbdev(intf));
950
951 chip->num_interfaces--;
952 if (chip->num_interfaces <= 0) {
953 usb_chip[chip->index] = NULL;
954 mutex_unlock(®ister_mutex);
955 snd_card_free_when_closed(card);
956 } else {
957 mutex_unlock(®ister_mutex);
958 }
959}
960
961
962int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
963{
964 int err;
965
966 atomic_inc(&chip->usage_count);
967 if (atomic_read(&chip->shutdown)) {
968 err = -EIO;
969 goto error;
970 }
971 err = snd_usb_autoresume(chip);
972 if (err < 0)
973 goto error;
974 return 0;
975
976 error:
977 if (atomic_dec_and_test(&chip->usage_count))
978 wake_up(&chip->shutdown_wait);
979 return err;
980}
981
982
983void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
984{
985 snd_usb_autosuspend(chip);
986 if (atomic_dec_and_test(&chip->usage_count))
987 wake_up(&chip->shutdown_wait);
988}
989
990#ifdef CONFIG_PM
991
992int snd_usb_autoresume(struct snd_usb_audio *chip)
993{
994 int i, err;
995
996 if (atomic_read(&chip->shutdown))
997 return -EIO;
998 if (atomic_inc_return(&chip->active) != 1)
999 return 0;
1000
1001 for (i = 0; i < chip->num_interfaces; i++) {
1002 err = usb_autopm_get_interface(chip->intf[i]);
1003 if (err < 0) {
1004
1005 while (--i >= 0)
1006 usb_autopm_put_interface(chip->intf[i]);
1007 atomic_dec(&chip->active);
1008 return err;
1009 }
1010 }
1011 return 0;
1012}
1013
1014void snd_usb_autosuspend(struct snd_usb_audio *chip)
1015{
1016 int i;
1017
1018 if (atomic_read(&chip->shutdown))
1019 return;
1020 if (!atomic_dec_and_test(&chip->active))
1021 return;
1022
1023 for (i = 0; i < chip->num_interfaces; i++)
1024 usb_autopm_put_interface(chip->intf[i]);
1025}
1026
1027static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1028{
1029 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1030 struct snd_usb_stream *as;
1031 struct snd_usb_endpoint *ep;
1032 struct usb_mixer_interface *mixer;
1033 struct list_head *p;
1034
1035 if (chip == USB_AUDIO_IFACE_UNUSED)
1036 return 0;
1037
1038 if (!chip->num_suspended_intf++) {
1039 list_for_each_entry(as, &chip->pcm_list, list)
1040 snd_usb_pcm_suspend(as);
1041 list_for_each_entry(ep, &chip->ep_list, list)
1042 snd_usb_endpoint_suspend(ep);
1043 list_for_each(p, &chip->midi_list)
1044 snd_usbmidi_suspend(p);
1045 list_for_each_entry(mixer, &chip->mixer_list, list)
1046 snd_usb_mixer_suspend(mixer);
1047 }
1048
1049 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1050 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1051 chip->system_suspend = chip->num_suspended_intf;
1052 }
1053
1054 return 0;
1055}
1056
1057static int usb_audio_resume(struct usb_interface *intf)
1058{
1059 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1060 struct snd_usb_stream *as;
1061 struct usb_mixer_interface *mixer;
1062 struct list_head *p;
1063 int err = 0;
1064
1065 if (chip == USB_AUDIO_IFACE_UNUSED)
1066 return 0;
1067
1068 atomic_inc(&chip->active);
1069 if (chip->num_suspended_intf > 1)
1070 goto out;
1071
1072 list_for_each_entry(as, &chip->pcm_list, list) {
1073 err = snd_usb_pcm_resume(as);
1074 if (err < 0)
1075 goto err_out;
1076 }
1077
1078
1079
1080
1081
1082 list_for_each_entry(mixer, &chip->mixer_list, list) {
1083 err = snd_usb_mixer_resume(mixer);
1084 if (err < 0)
1085 goto err_out;
1086 }
1087
1088 list_for_each(p, &chip->midi_list) {
1089 snd_usbmidi_resume(p);
1090 }
1091
1092 out:
1093 if (chip->num_suspended_intf == chip->system_suspend) {
1094 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1095 chip->system_suspend = 0;
1096 }
1097 chip->num_suspended_intf--;
1098
1099err_out:
1100 atomic_dec(&chip->active);
1101 return err;
1102}
1103#else
1104#define usb_audio_suspend NULL
1105#define usb_audio_resume NULL
1106#define usb_audio_resume NULL
1107#endif
1108
1109static const struct usb_device_id usb_audio_ids [] = {
1110#include "quirks-table.h"
1111 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1112 .bInterfaceClass = USB_CLASS_AUDIO,
1113 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1114 { }
1115};
1116MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1117
1118
1119
1120
1121
1122static struct usb_driver usb_audio_driver = {
1123 .name = "snd-usb-audio",
1124 .probe = usb_audio_probe,
1125 .disconnect = usb_audio_disconnect,
1126 .suspend = usb_audio_suspend,
1127 .resume = usb_audio_resume,
1128 .reset_resume = usb_audio_resume,
1129 .id_table = usb_audio_ids,
1130 .supports_autosuspend = 1,
1131};
1132
1133module_usb_driver(usb_audio_driver);
1134