1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * (Tentative) USB Audio Driver for ALSA
4 *
5 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
6 *
7 * Many codes borrowed from audio.c by
8 * Alan Cox (alan@lxorguk.ukuu.org.uk)
9 * Thomas Sailer (sailer@ife.ee.ethz.ch)
10 *
11 * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
12 *
13 * NOTES:
14 *
15 * - the linked URBs would be preferred but not used so far because of
16 * the instability of unlinking.
17 * - type II is not supported properly. there is no device which supports
18 * this type *correctly*. SB extigy looks as if it supports, but it's
19 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
20 */
21
22
23 #include <linux/bitops.h>
24 #include <linux/init.h>
25 #include <linux/list.h>
26 #include <linux/slab.h>
27 #include <linux/string.h>
28 #include <linux/ctype.h>
29 #include <linux/usb.h>
30 #include <linux/moduleparam.h>
31 #include <linux/mutex.h>
32 #include <linux/usb/audio.h>
33 #include <linux/usb/audio-v2.h>
34 #include <linux/usb/audio-v3.h>
35 #include <linux/module.h>
36
37 #include <sound/control.h>
38 #include <sound/core.h>
39 #include <sound/info.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/initval.h>
43
44 #include "usbaudio.h"
45 #include "card.h"
46 #include "midi.h"
47 #include "midi2.h"
48 #include "mixer.h"
49 #include "proc.h"
50 #include "quirks.h"
51 #include "endpoint.h"
52 #include "helper.h"
53 #include "pcm.h"
54 #include "format.h"
55 #include "power.h"
56 #include "stream.h"
57 #include "media.h"
58
59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60 MODULE_DESCRIPTION("USB Audio");
61 MODULE_LICENSE("GPL");
62
63 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
64 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
65 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
66 /* Vendor/product IDs for this card */
67 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
68 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
69 static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
70 static bool ignore_ctl_error;
71 static bool autoclock = true;
72 static bool lowlatency = true;
73 static char *quirk_alias[SNDRV_CARDS];
74 static char *delayed_register[SNDRV_CARDS];
75 static bool implicit_fb[SNDRV_CARDS];
76 static unsigned int quirk_flags[SNDRV_CARDS];
77
78 bool snd_usb_use_vmalloc = true;
79 bool snd_usb_skip_validation;
80
81 module_param_array(index, int, NULL, 0444);
82 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
83 module_param_array(id, charp, NULL, 0444);
84 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
85 module_param_array(enable, bool, NULL, 0444);
86 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
87 module_param_array(vid, int, NULL, 0444);
88 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
89 module_param_array(pid, int, NULL, 0444);
90 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
91 module_param_array(device_setup, int, NULL, 0444);
92 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
93 module_param(ignore_ctl_error, bool, 0444);
94 MODULE_PARM_DESC(ignore_ctl_error,
95 "Ignore errors from USB controller for mixer interfaces.");
96 module_param(autoclock, bool, 0444);
97 MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
98 module_param(lowlatency, bool, 0444);
99 MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes).");
100 module_param_array(quirk_alias, charp, NULL, 0444);
101 MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
102 module_param_array(delayed_register, charp, NULL, 0444);
103 MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4.");
104 module_param_array(implicit_fb, bool, NULL, 0444);
105 MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode.");
106 module_param_array(quirk_flags, uint, NULL, 0444);
107 MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags.");
108 module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
109 MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
110 module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
111 MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
112
113 /*
114 * we keep the snd_usb_audio_t instances by ourselves for merging
115 * the all interfaces on the same card as one sound device.
116 */
117
118 static DEFINE_MUTEX(register_mutex);
119 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
120 static struct usb_driver usb_audio_driver;
121 static struct snd_usb_platform_ops *platform_ops;
122
123 /*
124 * Register platform specific operations that will be notified on events
125 * which occur in USB SND. The platform driver can utilize this path to
126 * enable features, such as USB audio offloading, which allows for audio data
127 * to be queued by an audio DSP.
128 *
129 * Only one set of platform operations can be registered to USB SND. The
130 * platform register operation is protected by the register_mutex.
131 */
snd_usb_register_platform_ops(struct snd_usb_platform_ops * ops)132 int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops)
133 {
134 guard(mutex)(®ister_mutex);
135 if (platform_ops)
136 return -EEXIST;
137
138 platform_ops = ops;
139 return 0;
140 }
141 EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops);
142
143 /*
144 * Unregisters the current set of platform operations. This allows for
145 * a new set to be registered if required.
146 *
147 * The platform unregister operation is protected by the register_mutex.
148 */
snd_usb_unregister_platform_ops(void)149 int snd_usb_unregister_platform_ops(void)
150 {
151 guard(mutex)(®ister_mutex);
152 platform_ops = NULL;
153
154 return 0;
155 }
156 EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops);
157
158 /*
159 * in case the platform driver was not ready at the time of USB SND
160 * device connect, expose an API to discover all connected USB devices
161 * so it can populate any dependent resources/structures.
162 */
snd_usb_rediscover_devices(void)163 void snd_usb_rediscover_devices(void)
164 {
165 int i;
166
167 guard(mutex)(®ister_mutex);
168
169 if (!platform_ops || !platform_ops->connect_cb)
170 return;
171
172 for (i = 0; i < SNDRV_CARDS; i++) {
173 if (usb_chip[i])
174 platform_ops->connect_cb(usb_chip[i]);
175 }
176 }
177 EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices);
178
179 /*
180 * Checks to see if requested audio profile, i.e sample rate, # of
181 * channels, etc... is supported by the substream associated to the
182 * USB audio device.
183 */
184 struct snd_usb_stream *
snd_usb_find_suppported_substream(int card_idx,struct snd_pcm_hw_params * params,int direction)185 snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params,
186 int direction)
187 {
188 struct snd_usb_audio *chip;
189 struct snd_usb_substream *subs;
190 struct snd_usb_stream *as;
191
192 /*
193 * Register mutex is held when populating and clearing usb_chip
194 * array.
195 */
196 guard(mutex)(®ister_mutex);
197 chip = usb_chip[card_idx];
198
199 if (chip && enable[card_idx]) {
200 list_for_each_entry(as, &chip->pcm_list, list) {
201 subs = &as->substream[direction];
202 if (snd_usb_find_substream_format(subs, params))
203 return as;
204 }
205 }
206
207 return NULL;
208 }
209 EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream);
210
211 /*
212 * disconnect streams
213 * called from usb_audio_disconnect()
214 */
snd_usb_stream_disconnect(struct snd_usb_stream * as)215 static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
216 {
217 int idx;
218 struct snd_usb_substream *subs;
219
220 for (idx = 0; idx < 2; idx++) {
221 subs = &as->substream[idx];
222 if (!subs->num_formats)
223 continue;
224 subs->data_endpoint = NULL;
225 subs->sync_endpoint = NULL;
226 }
227 }
228
snd_usb_create_stream(struct snd_usb_audio * chip,int ctrlif,int interface)229 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
230 {
231 struct usb_device *dev = chip->dev;
232 struct usb_host_interface *alts;
233 struct usb_interface_descriptor *altsd;
234 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
235
236 if (!iface) {
237 dev_err(&dev->dev, "%u:%d : does not exist\n",
238 ctrlif, interface);
239 return -EINVAL;
240 }
241
242 alts = &iface->altsetting[0];
243 altsd = get_iface_desc(alts);
244
245 /*
246 * Android with both accessory and audio interfaces enabled gets the
247 * interface numbers wrong.
248 */
249 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
250 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
251 interface == 0 &&
252 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
253 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
254 interface = 2;
255 iface = usb_ifnum_to_if(dev, interface);
256 if (!iface)
257 return -EINVAL;
258 alts = &iface->altsetting[0];
259 altsd = get_iface_desc(alts);
260 }
261
262 if (usb_interface_claimed(iface)) {
263 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
264 ctrlif, interface);
265 return -EINVAL;
266 }
267
268 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
269 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
270 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
271 int err = snd_usb_midi_v2_create(chip, iface, NULL,
272 chip->usb_id);
273 if (err < 0) {
274 dev_err(&dev->dev,
275 "%u:%d: cannot create sequencer device\n",
276 ctrlif, interface);
277 return -EINVAL;
278 }
279 return usb_driver_claim_interface(&usb_audio_driver, iface,
280 USB_AUDIO_IFACE_UNUSED);
281 }
282
283 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
284 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
285 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
286 dev_dbg(&dev->dev,
287 "%u:%d: skipping non-supported interface %d\n",
288 ctrlif, interface, altsd->bInterfaceClass);
289 /* skip non-supported classes */
290 return -EINVAL;
291 }
292
293 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
294 dev_err(&dev->dev, "low speed audio streaming not supported\n");
295 return -EINVAL;
296 }
297
298 snd_usb_add_ctrl_interface_link(chip, interface, ctrlif);
299
300 if (! snd_usb_parse_audio_interface(chip, interface)) {
301 usb_set_interface(dev, interface, 0); /* reset the current interface */
302 return usb_driver_claim_interface(&usb_audio_driver, iface,
303 USB_AUDIO_IFACE_UNUSED);
304 }
305
306 return 0;
307 }
308
309 /*
310 * parse audio control descriptor and create pcm/midi streams
311 */
snd_usb_create_streams(struct snd_usb_audio * chip,int ctrlif)312 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
313 {
314 struct usb_device *dev = chip->dev;
315 struct usb_host_interface *host_iface;
316 struct usb_interface_descriptor *altsd;
317 int i, protocol;
318
319 /* find audiocontrol interface */
320 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
321 altsd = get_iface_desc(host_iface);
322 protocol = altsd->bInterfaceProtocol;
323
324 switch (protocol) {
325 default:
326 dev_warn(&dev->dev,
327 "unknown interface protocol %#02x, assuming v1\n",
328 protocol);
329 fallthrough;
330
331 case UAC_VERSION_1: {
332 struct uac1_ac_header_descriptor *h1;
333 int rest_bytes;
334
335 h1 = snd_usb_find_csint_desc(host_iface->extra,
336 host_iface->extralen,
337 NULL, UAC_HEADER);
338 if (!h1 || h1->bLength < sizeof(*h1)) {
339 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
340 return -EINVAL;
341 }
342
343 rest_bytes = (void *)(host_iface->extra +
344 host_iface->extralen) - (void *)h1;
345
346 /* just to be sure -- this shouldn't hit at all */
347 if (rest_bytes <= 0) {
348 dev_err(&dev->dev, "invalid control header\n");
349 return -EINVAL;
350 }
351
352 if (rest_bytes < sizeof(*h1)) {
353 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
354 return -EINVAL;
355 }
356
357 if (!h1->bInCollection) {
358 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
359 return -EINVAL;
360 }
361
362 if (rest_bytes < h1->bLength) {
363 dev_err(&dev->dev, "invalid buffer length (v1)\n");
364 return -EINVAL;
365 }
366
367 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
368 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
369 return -EINVAL;
370 }
371
372 for (i = 0; i < h1->bInCollection; i++)
373 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
374
375 break;
376 }
377
378 case UAC_VERSION_2:
379 case UAC_VERSION_3: {
380 struct usb_interface_assoc_descriptor *assoc =
381 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
382
383 if (!assoc) {
384 /*
385 * Firmware writers cannot count to three. So to find
386 * the IAD on the NuForce UDH-100, also check the next
387 * interface.
388 */
389 struct usb_interface *iface =
390 usb_ifnum_to_if(dev, ctrlif + 1);
391 if (iface &&
392 iface->intf_assoc &&
393 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
394 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
395 assoc = iface->intf_assoc;
396 }
397
398 if (!assoc) {
399 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
400 return -EINVAL;
401 }
402
403 if (protocol == UAC_VERSION_3) {
404 int badd = assoc->bFunctionSubClass;
405
406 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
407 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
408 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
409 dev_err(&dev->dev,
410 "Unsupported UAC3 BADD profile\n");
411 return -EINVAL;
412 }
413
414 chip->badd_profile = badd;
415 }
416
417 for (i = 0; i < assoc->bInterfaceCount; i++) {
418 int intf = assoc->bFirstInterface + i;
419
420 if (intf != ctrlif)
421 snd_usb_create_stream(chip, ctrlif, intf);
422 }
423
424 break;
425 }
426 }
427
428 return 0;
429 }
430
431 /*
432 * Profile name preset table
433 */
434 struct usb_audio_device_name {
435 u32 id;
436 const char *vendor_name;
437 const char *product_name;
438 const char *profile_name; /* override card->longname */
439 };
440
441 #define PROFILE_NAME(vid, pid, vendor, product, profile) \
442 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
443 .product_name = (product), .profile_name = (profile) }
444 #define DEVICE_NAME(vid, pid, vendor, product) \
445 PROFILE_NAME(vid, pid, vendor, product, NULL)
446
447 /* vendor/product and profile name presets, sorted in device id order */
448 static const struct usb_audio_device_name usb_audio_names[] = {
449 /* HP Thunderbolt Dock Audio Headset */
450 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
451 "HP-Thunderbolt-Dock-Audio-Headset"),
452 /* HP Thunderbolt Dock Audio Module */
453 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
454 "HP-Thunderbolt-Dock-Audio-Module"),
455
456 /* Two entries for Gigabyte TRX40 Aorus Master:
457 * TRX40 Aorus Master has two USB-audio devices, one for the front
458 * headphone with ESS SABRE9218 DAC chip, while another for the rest
459 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
460 * Here we provide two distinct names for making UCM profiles easier.
461 */
462 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
463 "Gigabyte-Aorus-Master-Front-Headphone"),
464 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
465 "Gigabyte-Aorus-Master-Main-Audio"),
466
467 /* Gigabyte TRX40 Aorus Pro WiFi */
468 PROFILE_NAME(0x0414, 0xa002,
469 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
470
471 /* Creative/E-Mu devices */
472 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
473 /* Creative/Toshiba Multimedia Center SB-0500 */
474 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
475
476 /* Logitech Audio Devices */
477 DEVICE_NAME(0x046d, 0x0867, "Logitech, Inc.", "Logi-MeetUp"),
478 DEVICE_NAME(0x046d, 0x0874, "Logitech, Inc.", "Logi-Tap-Audio"),
479 DEVICE_NAME(0x046d, 0x087c, "Logitech, Inc.", "Logi-Huddle"),
480 DEVICE_NAME(0x046d, 0x0898, "Logitech, Inc.", "Logi-RB-Audio"),
481 DEVICE_NAME(0x046d, 0x08d2, "Logitech, Inc.", "Logi-RBM-Audio"),
482 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
483
484 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
485 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
486
487 /* ASUS ROG Zenith II: this machine has also two devices, one for
488 * the front headphone and another for the rest
489 */
490 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
491 "Zenith-II-Front-Headphone"),
492 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
493 "Zenith-II-Main-Audio"),
494
495 /* ASUS ROG Strix */
496 PROFILE_NAME(0x0b05, 0x1917,
497 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
498 /* ASUS PRIME TRX40 PRO-S */
499 PROFILE_NAME(0x0b05, 0x1918,
500 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
501
502 /* Dell WD15 Dock */
503 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
504 /* Dell WD19 Dock */
505 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
506
507 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
508
509 /*
510 * The original product_name is "USB Sound Device", however this name
511 * is also used by the CM106 based cards, so make it unique.
512 */
513 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
514 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
515
516 /* MSI TRX40 Creator */
517 PROFILE_NAME(0x0db0, 0x0d64,
518 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
519 /* MSI TRX40 */
520 PROFILE_NAME(0x0db0, 0x543d,
521 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
522
523 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
524
525 /* Dock/Stand for HP Engage Go */
526 PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock",
527 "HP-Engage-Go-Dock"),
528
529 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
530 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
531 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
532
533 /* aka. Serato Scratch Live DJ Box */
534 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
535
536 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
537 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
538 "Lenovo-ThinkStation-P620-Rear"),
539 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
540 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
541 "Lenovo-ThinkStation-P620-Main"),
542
543 /* Asrock TRX40 Creator */
544 PROFILE_NAME(0x26ce, 0x0a01,
545 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
546
547 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
548 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
549 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
550 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
551 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
552 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
553 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
554 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
555 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
556 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
557 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
558 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
559 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
560 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
561 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
562
563 { } /* terminator */
564 };
565
566 static const struct usb_audio_device_name *
lookup_device_name(u32 id)567 lookup_device_name(u32 id)
568 {
569 static const struct usb_audio_device_name *p;
570
571 for (p = usb_audio_names; p->id; p++)
572 if (p->id == id)
573 return p;
574 return NULL;
575 }
576
577 /*
578 * free the chip instance
579 *
580 * here we have to do not much, since pcm and controls are already freed
581 *
582 */
583
snd_usb_audio_free(struct snd_card * card)584 static void snd_usb_audio_free(struct snd_card *card)
585 {
586 struct snd_usb_audio *chip = card->private_data;
587
588 snd_usb_endpoint_free_all(chip);
589 snd_usb_midi_v2_free_all(chip);
590
591 mutex_destroy(&chip->mutex);
592 if (!atomic_read(&chip->shutdown))
593 dev_set_drvdata(&chip->dev->dev, NULL);
594 }
595
usb_audio_make_shortname(struct usb_device * dev,struct snd_usb_audio * chip,const struct snd_usb_audio_quirk * quirk)596 static void usb_audio_make_shortname(struct usb_device *dev,
597 struct snd_usb_audio *chip,
598 const struct snd_usb_audio_quirk *quirk)
599 {
600 struct snd_card *card = chip->card;
601 const struct usb_audio_device_name *preset;
602 const char *s = NULL;
603
604 preset = lookup_device_name(chip->usb_id);
605 if (preset && preset->product_name)
606 s = preset->product_name;
607 else if (quirk && quirk->product_name)
608 s = quirk->product_name;
609 if (s && *s) {
610 strscpy(card->shortname, s, sizeof(card->shortname));
611 return;
612 }
613
614 /* retrieve the device string as shortname */
615 if (!dev->descriptor.iProduct ||
616 usb_string(dev, dev->descriptor.iProduct,
617 card->shortname, sizeof(card->shortname)) <= 0) {
618 /* no name available from anywhere, so use ID */
619 scnprintf(card->shortname, sizeof(card->shortname),
620 "USB Device %#04x:%#04x",
621 USB_ID_VENDOR(chip->usb_id),
622 USB_ID_PRODUCT(chip->usb_id));
623 }
624
625 strim(card->shortname);
626 }
627
usb_audio_make_longname(struct usb_device * dev,struct snd_usb_audio * chip,const struct snd_usb_audio_quirk * quirk)628 static void usb_audio_make_longname(struct usb_device *dev,
629 struct snd_usb_audio *chip,
630 const struct snd_usb_audio_quirk *quirk)
631 {
632 struct snd_card *card = chip->card;
633 const struct usb_audio_device_name *preset;
634 const char *s = NULL;
635 int len;
636
637 preset = lookup_device_name(chip->usb_id);
638
639 /* shortcut - if any pre-defined string is given, use it */
640 if (preset && preset->profile_name)
641 s = preset->profile_name;
642 if (s && *s) {
643 strscpy(card->longname, s, sizeof(card->longname));
644 return;
645 }
646
647 if (preset && preset->vendor_name)
648 s = preset->vendor_name;
649 else if (quirk && quirk->vendor_name)
650 s = quirk->vendor_name;
651 *card->longname = 0;
652 if (s && *s) {
653 strscpy(card->longname, s, sizeof(card->longname));
654 } else {
655 /* retrieve the vendor and device strings as longname */
656 if (dev->descriptor.iManufacturer)
657 usb_string(dev, dev->descriptor.iManufacturer,
658 card->longname, sizeof(card->longname));
659 /* we don't really care if there isn't any vendor string */
660 }
661 if (*card->longname) {
662 strim(card->longname);
663 if (*card->longname)
664 strlcat(card->longname, " ", sizeof(card->longname));
665 }
666
667 strlcat(card->longname, card->shortname, sizeof(card->longname));
668
669 len = strlcat(card->longname, " at ", sizeof(card->longname));
670
671 if (len < sizeof(card->longname))
672 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
673
674 switch (snd_usb_get_speed(dev)) {
675 case USB_SPEED_LOW:
676 strlcat(card->longname, ", low speed", sizeof(card->longname));
677 break;
678 case USB_SPEED_FULL:
679 strlcat(card->longname, ", full speed", sizeof(card->longname));
680 break;
681 case USB_SPEED_HIGH:
682 strlcat(card->longname, ", high speed", sizeof(card->longname));
683 break;
684 case USB_SPEED_SUPER:
685 strlcat(card->longname, ", super speed", sizeof(card->longname));
686 break;
687 case USB_SPEED_SUPER_PLUS:
688 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
689 break;
690 default:
691 break;
692 }
693 }
694
695 /*
696 * create a chip instance and set its names.
697 */
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)698 static int snd_usb_audio_create(struct usb_interface *intf,
699 struct usb_device *dev, int idx,
700 const struct snd_usb_audio_quirk *quirk,
701 unsigned int usb_id,
702 struct snd_usb_audio **rchip)
703 {
704 struct snd_card *card;
705 struct snd_usb_audio *chip;
706 int err;
707 char component[14];
708
709 *rchip = NULL;
710
711 switch (snd_usb_get_speed(dev)) {
712 case USB_SPEED_LOW:
713 case USB_SPEED_FULL:
714 case USB_SPEED_HIGH:
715 case USB_SPEED_SUPER:
716 case USB_SPEED_SUPER_PLUS:
717 break;
718 default:
719 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
720 return -ENXIO;
721 }
722
723 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
724 sizeof(*chip), &card);
725 if (err < 0) {
726 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
727 return err;
728 }
729
730 chip = card->private_data;
731 mutex_init(&chip->mutex);
732 init_waitqueue_head(&chip->shutdown_wait);
733 chip->index = idx;
734 chip->dev = dev;
735 chip->card = card;
736 chip->setup = device_setup[idx];
737 chip->generic_implicit_fb = implicit_fb[idx];
738 chip->autoclock = autoclock;
739 chip->lowlatency = lowlatency;
740 atomic_set(&chip->active, 1); /* avoid autopm during probing */
741 atomic_set(&chip->usage_count, 0);
742 atomic_set(&chip->shutdown, 0);
743
744 chip->usb_id = usb_id;
745 INIT_LIST_HEAD(&chip->pcm_list);
746 INIT_LIST_HEAD(&chip->ep_list);
747 INIT_LIST_HEAD(&chip->iface_ref_list);
748 INIT_LIST_HEAD(&chip->clock_ref_list);
749 INIT_LIST_HEAD(&chip->midi_list);
750 INIT_LIST_HEAD(&chip->midi_v2_list);
751 INIT_LIST_HEAD(&chip->mixer_list);
752
753 if (quirk_flags[idx])
754 chip->quirk_flags = quirk_flags[idx];
755 else
756 snd_usb_init_quirk_flags(chip);
757
758 card->private_free = snd_usb_audio_free;
759
760 strscpy(card->driver, "USB-Audio");
761 scnprintf(component, sizeof(component), "USB%04x:%04x",
762 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
763 snd_component_add(card, component);
764
765 usb_audio_make_shortname(dev, chip, quirk);
766 usb_audio_make_longname(dev, chip, quirk);
767
768 snd_usb_audio_create_proc(chip);
769
770 *rchip = chip;
771 return 0;
772 }
773
774 /* look for a matching quirk alias id */
get_alias_id(struct usb_device * dev,unsigned int * id)775 static bool get_alias_id(struct usb_device *dev, unsigned int *id)
776 {
777 int i;
778 unsigned int src, dst;
779
780 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
781 if (!quirk_alias[i] ||
782 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
783 src != *id)
784 continue;
785 dev_info(&dev->dev,
786 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
787 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
788 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
789 *id = dst;
790 return true;
791 }
792
793 return false;
794 }
795
check_delayed_register_option(struct snd_usb_audio * chip)796 static int check_delayed_register_option(struct snd_usb_audio *chip)
797 {
798 int i;
799 unsigned int id, inum;
800
801 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
802 if (delayed_register[i] &&
803 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
804 id == chip->usb_id)
805 return inum;
806 }
807
808 return -1;
809 }
810
811 static const struct usb_device_id usb_audio_ids[]; /* defined below */
812
813 /* look for the last interface that matches with our ids and remember it */
find_last_interface(struct snd_usb_audio * chip)814 static void find_last_interface(struct snd_usb_audio *chip)
815 {
816 struct usb_host_config *config = chip->dev->actconfig;
817 struct usb_interface *intf;
818 int i;
819
820 if (!config)
821 return;
822 for (i = 0; i < config->desc.bNumInterfaces; i++) {
823 intf = config->interface[i];
824 if (usb_match_id(intf, usb_audio_ids))
825 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
826 }
827 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
828 }
829
830 /* look for the corresponding quirk */
831 static const struct snd_usb_audio_quirk *
get_alias_quirk(struct usb_device * dev,unsigned int id)832 get_alias_quirk(struct usb_device *dev, unsigned int id)
833 {
834 const struct usb_device_id *p;
835
836 for (p = usb_audio_ids; p->match_flags; p++) {
837 /* FIXME: this checks only vendor:product pair in the list */
838 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
839 USB_DEVICE_ID_MATCH_DEVICE &&
840 p->idVendor == USB_ID_VENDOR(id) &&
841 p->idProduct == USB_ID_PRODUCT(id))
842 return (const struct snd_usb_audio_quirk *)p->driver_info;
843 }
844
845 return NULL;
846 }
847
848 /* register card if we reach to the last interface or to the specified
849 * one given via option
850 */
try_to_register_card(struct snd_usb_audio * chip,int ifnum)851 static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
852 {
853 if (check_delayed_register_option(chip) == ifnum ||
854 chip->last_iface == ifnum ||
855 usb_interface_claimed(usb_ifnum_to_if(chip->dev, chip->last_iface)))
856 return snd_card_register(chip->card);
857 return 0;
858 }
859
860 /*
861 * probe the active usb device
862 *
863 * note that this can be called multiple times per a device, when it
864 * includes multiple audio control interfaces.
865 *
866 * thus we check the usb device pointer and creates the card instance
867 * only at the first time. the successive calls of this function will
868 * append the pcm interface to the corresponding card.
869 */
usb_audio_probe(struct usb_interface * intf,const struct usb_device_id * usb_id)870 static int usb_audio_probe(struct usb_interface *intf,
871 const struct usb_device_id *usb_id)
872 {
873 struct usb_device *dev = interface_to_usbdev(intf);
874 const struct snd_usb_audio_quirk *quirk =
875 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
876 struct snd_usb_audio *chip;
877 int i, err;
878 struct usb_host_interface *alts;
879 int ifnum;
880 u32 id;
881
882 alts = &intf->altsetting[0];
883 ifnum = get_iface_desc(alts)->bInterfaceNumber;
884 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
885 le16_to_cpu(dev->descriptor.idProduct));
886 if (get_alias_id(dev, &id))
887 quirk = get_alias_quirk(dev, id);
888 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
889 return -ENXIO;
890 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
891 return -ENODEV;
892
893 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
894 if (err < 0)
895 return err;
896
897 /*
898 * found a config. now register to ALSA
899 */
900
901 /* check whether it's already registered */
902 chip = NULL;
903 mutex_lock(®ister_mutex);
904 for (i = 0; i < SNDRV_CARDS; i++) {
905 if (usb_chip[i] && usb_chip[i]->dev == dev) {
906 if (atomic_read(&usb_chip[i]->shutdown)) {
907 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
908 err = -EIO;
909 goto __error;
910 }
911 chip = usb_chip[i];
912 atomic_inc(&chip->active); /* avoid autopm */
913 break;
914 }
915 }
916 if (! chip) {
917 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
918 if (err < 0)
919 goto __error;
920
921 /* it's a fresh one.
922 * now look for an empty slot and create a new card instance
923 */
924 for (i = 0; i < SNDRV_CARDS; i++)
925 if (!usb_chip[i] &&
926 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
927 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
928 if (enable[i]) {
929 err = snd_usb_audio_create(intf, dev, i, quirk,
930 id, &chip);
931 if (err < 0)
932 goto __error;
933 break;
934 } else if (vid[i] != -1 || pid[i] != -1) {
935 dev_info(&dev->dev,
936 "device (%04x:%04x) is disabled\n",
937 USB_ID_VENDOR(id),
938 USB_ID_PRODUCT(id));
939 err = -ENOENT;
940 goto __error;
941 }
942 }
943 if (!chip) {
944 dev_err(&dev->dev, "no available usb audio device\n");
945 err = -ENODEV;
946 goto __error;
947 }
948 find_last_interface(chip);
949 }
950
951 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
952 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
953 err = -EINVAL;
954 goto __error;
955 }
956
957 dev_set_drvdata(&dev->dev, chip);
958
959 if (ignore_ctl_error)
960 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
961
962 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
963 usb_disable_autosuspend(interface_to_usbdev(intf));
964
965 /*
966 * For devices with more than one control interface, we assume the
967 * first contains the audio controls. We might need a more specific
968 * check here in the future.
969 */
970 if (!chip->ctrl_intf)
971 chip->ctrl_intf = alts;
972
973 err = 1; /* continue */
974 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
975 /* need some special handlings */
976 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
977 if (err < 0)
978 goto __error;
979 }
980
981 if (err > 0) {
982 /* create normal USB audio interfaces */
983 err = snd_usb_create_streams(chip, ifnum);
984 if (err < 0)
985 goto __error;
986 err = snd_usb_create_mixer(chip, ifnum);
987 if (err < 0)
988 goto __error;
989 }
990
991 if (chip->need_delayed_register) {
992 dev_info(&dev->dev,
993 "Found post-registration device assignment: %08x:%02x\n",
994 chip->usb_id, ifnum);
995 chip->need_delayed_register = false; /* clear again */
996 }
997
998 err = try_to_register_card(chip, ifnum);
999 if (err < 0)
1000 goto __error_no_register;
1001
1002 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
1003 /* don't want to fail when snd_media_device_create() fails */
1004 snd_media_device_create(chip, intf);
1005 }
1006
1007 if (quirk)
1008 chip->quirk_type = quirk->type;
1009
1010 usb_chip[chip->index] = chip;
1011 chip->intf[chip->num_interfaces] = intf;
1012 chip->num_interfaces++;
1013 usb_set_intfdata(intf, chip);
1014 atomic_dec(&chip->active);
1015
1016 if (platform_ops && platform_ops->connect_cb)
1017 platform_ops->connect_cb(chip);
1018 mutex_unlock(®ister_mutex);
1019
1020 return 0;
1021
1022 __error:
1023 /* in the case of error in secondary interface, still try to register */
1024 if (chip)
1025 try_to_register_card(chip, ifnum);
1026
1027 __error_no_register:
1028 if (chip) {
1029 /* chip->active is inside the chip->card object,
1030 * decrement before memory is possibly returned.
1031 */
1032 atomic_dec(&chip->active);
1033 if (!chip->num_interfaces)
1034 snd_card_free(chip->card);
1035 }
1036 mutex_unlock(®ister_mutex);
1037 return err;
1038 }
1039
1040 /*
1041 * we need to take care of counter, since disconnection can be called also
1042 * many times as well as usb_audio_probe().
1043 */
usb_audio_disconnect(struct usb_interface * intf)1044 static void usb_audio_disconnect(struct usb_interface *intf)
1045 {
1046 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1047 struct snd_card *card;
1048 struct list_head *p;
1049
1050 if (chip == USB_AUDIO_IFACE_UNUSED)
1051 return;
1052
1053 card = chip->card;
1054
1055 mutex_lock(®ister_mutex);
1056 if (platform_ops && platform_ops->disconnect_cb)
1057 platform_ops->disconnect_cb(chip);
1058
1059 if (atomic_inc_return(&chip->shutdown) == 1) {
1060 struct snd_usb_stream *as;
1061 struct snd_usb_endpoint *ep;
1062 struct usb_mixer_interface *mixer;
1063
1064 /* wait until all pending tasks done;
1065 * they are protected by snd_usb_lock_shutdown()
1066 */
1067 wait_event(chip->shutdown_wait,
1068 !atomic_read(&chip->usage_count));
1069 snd_card_disconnect(card);
1070 /* release the pcm resources */
1071 list_for_each_entry(as, &chip->pcm_list, list) {
1072 snd_usb_stream_disconnect(as);
1073 }
1074 /* release the endpoint resources */
1075 list_for_each_entry(ep, &chip->ep_list, list) {
1076 snd_usb_endpoint_release(ep);
1077 }
1078 /* release the midi resources */
1079 list_for_each(p, &chip->midi_list) {
1080 snd_usbmidi_disconnect(p);
1081 }
1082 snd_usb_midi_v2_disconnect_all(chip);
1083 /*
1084 * Nice to check quirk && quirk->shares_media_device and
1085 * then call the snd_media_device_delete(). Don't have
1086 * access to the quirk here. snd_media_device_delete()
1087 * accesses mixer_list
1088 */
1089 snd_media_device_delete(chip);
1090
1091 /* release mixer resources */
1092 list_for_each_entry(mixer, &chip->mixer_list, list) {
1093 snd_usb_mixer_disconnect(mixer);
1094 }
1095 }
1096
1097 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
1098 usb_enable_autosuspend(interface_to_usbdev(intf));
1099
1100 chip->num_interfaces--;
1101 if (chip->num_interfaces <= 0) {
1102 usb_chip[chip->index] = NULL;
1103 mutex_unlock(®ister_mutex);
1104 snd_card_free_when_closed(card);
1105 } else {
1106 mutex_unlock(®ister_mutex);
1107 }
1108 }
1109
1110 /* lock the shutdown (disconnect) task and autoresume */
snd_usb_lock_shutdown(struct snd_usb_audio * chip)1111 int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1112 {
1113 int err;
1114
1115 atomic_inc(&chip->usage_count);
1116 if (atomic_read(&chip->shutdown)) {
1117 err = -EIO;
1118 goto error;
1119 }
1120 err = snd_usb_autoresume(chip);
1121 if (err < 0)
1122 goto error;
1123 return 0;
1124
1125 error:
1126 if (atomic_dec_and_test(&chip->usage_count))
1127 wake_up(&chip->shutdown_wait);
1128 return err;
1129 }
1130 EXPORT_SYMBOL_GPL(snd_usb_lock_shutdown);
1131
1132 /* autosuspend and unlock the shutdown */
snd_usb_unlock_shutdown(struct snd_usb_audio * chip)1133 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1134 {
1135 snd_usb_autosuspend(chip);
1136 if (atomic_dec_and_test(&chip->usage_count))
1137 wake_up(&chip->shutdown_wait);
1138 }
1139 EXPORT_SYMBOL_GPL(snd_usb_unlock_shutdown);
1140
snd_usb_autoresume(struct snd_usb_audio * chip)1141 int snd_usb_autoresume(struct snd_usb_audio *chip)
1142 {
1143 int i, err;
1144
1145 if (atomic_read(&chip->shutdown))
1146 return -EIO;
1147 if (atomic_inc_return(&chip->active) != 1)
1148 return 0;
1149
1150 for (i = 0; i < chip->num_interfaces; i++) {
1151 err = usb_autopm_get_interface(chip->intf[i]);
1152 if (err < 0) {
1153 /* rollback */
1154 while (--i >= 0)
1155 usb_autopm_put_interface(chip->intf[i]);
1156 atomic_dec(&chip->active);
1157 return err;
1158 }
1159 }
1160 return 0;
1161 }
1162 EXPORT_SYMBOL_GPL(snd_usb_autoresume);
1163
snd_usb_autosuspend(struct snd_usb_audio * chip)1164 void snd_usb_autosuspend(struct snd_usb_audio *chip)
1165 {
1166 int i;
1167
1168 if (atomic_read(&chip->shutdown))
1169 return;
1170 if (!atomic_dec_and_test(&chip->active))
1171 return;
1172
1173 for (i = 0; i < chip->num_interfaces; i++)
1174 usb_autopm_put_interface(chip->intf[i]);
1175 }
1176 EXPORT_SYMBOL_GPL(snd_usb_autosuspend);
1177
usb_audio_suspend(struct usb_interface * intf,pm_message_t message)1178 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1179 {
1180 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1181 struct snd_usb_stream *as;
1182 struct snd_usb_endpoint *ep;
1183 struct usb_mixer_interface *mixer;
1184 struct list_head *p;
1185
1186 if (chip == USB_AUDIO_IFACE_UNUSED)
1187 return 0;
1188
1189 if (!chip->num_suspended_intf++) {
1190 list_for_each_entry(as, &chip->pcm_list, list)
1191 snd_usb_pcm_suspend(as);
1192 list_for_each_entry(ep, &chip->ep_list, list)
1193 snd_usb_endpoint_suspend(ep);
1194 list_for_each(p, &chip->midi_list)
1195 snd_usbmidi_suspend(p);
1196 list_for_each_entry(mixer, &chip->mixer_list, list)
1197 snd_usb_mixer_suspend(mixer);
1198 snd_usb_midi_v2_suspend_all(chip);
1199 }
1200
1201 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1202 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1203 chip->system_suspend = chip->num_suspended_intf;
1204 }
1205
1206 if (platform_ops && platform_ops->suspend_cb)
1207 platform_ops->suspend_cb(intf, message);
1208
1209 return 0;
1210 }
1211
usb_audio_resume(struct usb_interface * intf)1212 static int usb_audio_resume(struct usb_interface *intf)
1213 {
1214 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1215 struct snd_usb_stream *as;
1216 struct usb_mixer_interface *mixer;
1217 struct list_head *p;
1218 int err = 0;
1219
1220 if (chip == USB_AUDIO_IFACE_UNUSED)
1221 return 0;
1222
1223 atomic_inc(&chip->active); /* avoid autopm */
1224 if (chip->num_suspended_intf > 1)
1225 goto out;
1226
1227 list_for_each_entry(as, &chip->pcm_list, list) {
1228 err = snd_usb_pcm_resume(as);
1229 if (err < 0)
1230 goto err_out;
1231 }
1232
1233 /*
1234 * ALSA leaves material resumption to user space
1235 * we just notify and restart the mixers
1236 */
1237 list_for_each_entry(mixer, &chip->mixer_list, list) {
1238 err = snd_usb_mixer_resume(mixer);
1239 if (err < 0)
1240 goto err_out;
1241 }
1242
1243 list_for_each(p, &chip->midi_list) {
1244 snd_usbmidi_resume(p);
1245 }
1246
1247 snd_usb_midi_v2_resume_all(chip);
1248
1249 if (platform_ops && platform_ops->resume_cb)
1250 platform_ops->resume_cb(intf);
1251
1252 out:
1253 if (chip->num_suspended_intf == chip->system_suspend) {
1254 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1255 chip->system_suspend = 0;
1256 }
1257 chip->num_suspended_intf--;
1258
1259 err_out:
1260 atomic_dec(&chip->active); /* allow autopm after this point */
1261 return err;
1262 }
1263
1264 static const struct usb_device_id usb_audio_ids [] = {
1265 #include "quirks-table.h"
1266 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1267 .bInterfaceClass = USB_CLASS_AUDIO,
1268 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1269 { } /* Terminating entry */
1270 };
1271 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1272
1273 /*
1274 * entry point for linux usb interface
1275 */
1276
1277 static struct usb_driver usb_audio_driver = {
1278 .name = "snd-usb-audio",
1279 .probe = usb_audio_probe,
1280 .disconnect = usb_audio_disconnect,
1281 .suspend = usb_audio_suspend,
1282 .resume = usb_audio_resume,
1283 .reset_resume = usb_audio_resume,
1284 .id_table = usb_audio_ids,
1285 .supports_autosuspend = 1,
1286 };
1287
1288 module_usb_driver(usb_audio_driver);
1289