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 char *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_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
107 MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
108 module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
109 MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
110
111 /* protects quirk_flags */
112 static DEFINE_MUTEX(quirk_flags_mutex);
113
param_set_quirkp(const char * val,const struct kernel_param * kp)114 static int param_set_quirkp(const char *val,
115 const struct kernel_param *kp)
116 {
117 guard(mutex)(&quirk_flags_mutex);
118 return param_set_charp(val, kp);
119 }
120
121 static const struct kernel_param_ops param_ops_quirkp = {
122 .set = param_set_quirkp,
123 .get = param_get_charp,
124 .free = param_free_charp,
125 };
126
127 #define param_check_quirkp param_check_charp
128
129 module_param_array(quirk_flags, quirkp, NULL, 0644);
130 MODULE_PARM_DESC(quirk_flags, "Add/modify USB audio quirks");
131
132 /*
133 * we keep the snd_usb_audio_t instances by ourselves for merging
134 * the all interfaces on the same card as one sound device.
135 */
136
137 static DEFINE_MUTEX(register_mutex);
138 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
139 static struct usb_driver usb_audio_driver;
140 static struct snd_usb_platform_ops *platform_ops;
141
142 /*
143 * Register platform specific operations that will be notified on events
144 * which occur in USB SND. The platform driver can utilize this path to
145 * enable features, such as USB audio offloading, which allows for audio data
146 * to be queued by an audio DSP.
147 *
148 * Only one set of platform operations can be registered to USB SND. The
149 * platform register operation is protected by the register_mutex.
150 */
snd_usb_register_platform_ops(struct snd_usb_platform_ops * ops)151 int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops)
152 {
153 guard(mutex)(®ister_mutex);
154 if (platform_ops)
155 return -EEXIST;
156
157 platform_ops = ops;
158 return 0;
159 }
160 EXPORT_SYMBOL_GPL(snd_usb_register_platform_ops);
161
162 /*
163 * Unregisters the current set of platform operations. This allows for
164 * a new set to be registered if required.
165 *
166 * The platform unregister operation is protected by the register_mutex.
167 */
snd_usb_unregister_platform_ops(void)168 int snd_usb_unregister_platform_ops(void)
169 {
170 guard(mutex)(®ister_mutex);
171 platform_ops = NULL;
172
173 return 0;
174 }
175 EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops);
176
177 /*
178 * in case the platform driver was not ready at the time of USB SND
179 * device connect, expose an API to discover all connected USB devices
180 * so it can populate any dependent resources/structures.
181 */
snd_usb_rediscover_devices(void)182 void snd_usb_rediscover_devices(void)
183 {
184 int i;
185
186 guard(mutex)(®ister_mutex);
187
188 if (!platform_ops || !platform_ops->connect_cb)
189 return;
190
191 for (i = 0; i < SNDRV_CARDS; i++) {
192 if (usb_chip[i])
193 platform_ops->connect_cb(usb_chip[i]);
194 }
195 }
196 EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices);
197
198 /*
199 * Checks to see if requested audio profile, i.e sample rate, # of
200 * channels, etc... is supported by the substream associated to the
201 * USB audio device.
202 */
203 struct snd_usb_stream *
snd_usb_find_suppported_substream(int card_idx,struct snd_pcm_hw_params * params,int direction)204 snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params,
205 int direction)
206 {
207 struct snd_usb_audio *chip;
208 struct snd_usb_substream *subs;
209 struct snd_usb_stream *as;
210
211 /*
212 * Register mutex is held when populating and clearing usb_chip
213 * array.
214 */
215 guard(mutex)(®ister_mutex);
216 chip = usb_chip[card_idx];
217
218 if (chip && enable[card_idx]) {
219 list_for_each_entry(as, &chip->pcm_list, list) {
220 subs = &as->substream[direction];
221 if (snd_usb_find_substream_format(subs, params))
222 return as;
223 }
224 }
225
226 return NULL;
227 }
228 EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream);
229
230 /*
231 * disconnect streams
232 * called from usb_audio_disconnect()
233 */
snd_usb_stream_disconnect(struct snd_usb_stream * as)234 static void snd_usb_stream_disconnect(struct snd_usb_stream *as)
235 {
236 int idx;
237 struct snd_usb_substream *subs;
238
239 for (idx = 0; idx < 2; idx++) {
240 subs = &as->substream[idx];
241 if (!subs->num_formats)
242 continue;
243 subs->data_endpoint = NULL;
244 subs->sync_endpoint = NULL;
245 }
246 }
247
snd_usb_create_stream(struct snd_usb_audio * chip,int ctrlif,int interface)248 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
249 {
250 struct usb_device *dev = chip->dev;
251 struct usb_host_interface *alts;
252 struct usb_interface_descriptor *altsd;
253 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
254
255 if (!iface) {
256 dev_err(&dev->dev, "%u:%d : does not exist\n",
257 ctrlif, interface);
258 return -EINVAL;
259 }
260
261 alts = &iface->altsetting[0];
262 altsd = get_iface_desc(alts);
263
264 /*
265 * Android with both accessory and audio interfaces enabled gets the
266 * interface numbers wrong.
267 */
268 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
269 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
270 interface == 0 &&
271 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
272 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
273 interface = 2;
274 iface = usb_ifnum_to_if(dev, interface);
275 if (!iface)
276 return -EINVAL;
277 alts = &iface->altsetting[0];
278 altsd = get_iface_desc(alts);
279 }
280
281 if (usb_interface_claimed(iface)) {
282 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
283 ctrlif, interface);
284 return -EINVAL;
285 }
286
287 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
288 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
289 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
290 int err = snd_usb_midi_v2_create(chip, iface, NULL,
291 chip->usb_id);
292 if (err < 0) {
293 dev_err(&dev->dev,
294 "%u:%d: cannot create sequencer device\n",
295 ctrlif, interface);
296 return -EINVAL;
297 }
298 return usb_driver_claim_interface(&usb_audio_driver, iface,
299 USB_AUDIO_IFACE_UNUSED);
300 }
301
302 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
303 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
304 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
305 dev_dbg(&dev->dev,
306 "%u:%d: skipping non-supported interface %d\n",
307 ctrlif, interface, altsd->bInterfaceClass);
308 /* skip non-supported classes */
309 return -EINVAL;
310 }
311
312 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
313 dev_err(&dev->dev, "low speed audio streaming not supported\n");
314 return -EINVAL;
315 }
316
317 snd_usb_add_ctrl_interface_link(chip, interface, ctrlif);
318
319 if (! snd_usb_parse_audio_interface(chip, interface)) {
320 usb_set_interface(dev, interface, 0); /* reset the current interface */
321 return usb_driver_claim_interface(&usb_audio_driver, iface,
322 USB_AUDIO_IFACE_UNUSED);
323 }
324
325 return 0;
326 }
327
328 /*
329 * parse audio control descriptor and create pcm/midi streams
330 */
snd_usb_create_streams(struct snd_usb_audio * chip,int ctrlif)331 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
332 {
333 struct usb_device *dev = chip->dev;
334 struct usb_host_interface *host_iface;
335 struct usb_interface_descriptor *altsd;
336 int i, protocol;
337
338 /* find audiocontrol interface */
339 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
340 altsd = get_iface_desc(host_iface);
341 protocol = altsd->bInterfaceProtocol;
342
343 switch (protocol) {
344 default:
345 dev_warn(&dev->dev,
346 "unknown interface protocol %#02x, assuming v1\n",
347 protocol);
348 fallthrough;
349
350 case UAC_VERSION_1: {
351 struct uac1_ac_header_descriptor *h1;
352 int rest_bytes;
353
354 h1 = snd_usb_find_csint_desc(host_iface->extra,
355 host_iface->extralen,
356 NULL, UAC_HEADER);
357 if (!h1 || h1->bLength < sizeof(*h1)) {
358 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
359 return -EINVAL;
360 }
361
362 rest_bytes = (void *)(host_iface->extra +
363 host_iface->extralen) - (void *)h1;
364
365 /* just to be sure -- this shouldn't hit at all */
366 if (rest_bytes <= 0) {
367 dev_err(&dev->dev, "invalid control header\n");
368 return -EINVAL;
369 }
370
371 if (rest_bytes < sizeof(*h1)) {
372 dev_err(&dev->dev, "too short v1 buffer descriptor\n");
373 return -EINVAL;
374 }
375
376 if (!h1->bInCollection) {
377 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
378 return -EINVAL;
379 }
380
381 if (rest_bytes < h1->bLength) {
382 dev_err(&dev->dev, "invalid buffer length (v1)\n");
383 return -EINVAL;
384 }
385
386 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
387 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
388 return -EINVAL;
389 }
390
391 for (i = 0; i < h1->bInCollection; i++)
392 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
393
394 break;
395 }
396
397 case UAC_VERSION_2:
398 case UAC_VERSION_3: {
399 struct usb_interface_assoc_descriptor *assoc =
400 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
401
402 if (!assoc) {
403 /*
404 * Firmware writers cannot count to three. So to find
405 * the IAD on the NuForce UDH-100, also check the next
406 * interface.
407 */
408 struct usb_interface *iface =
409 usb_ifnum_to_if(dev, ctrlif + 1);
410 if (iface &&
411 iface->intf_assoc &&
412 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
413 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
414 assoc = iface->intf_assoc;
415 }
416
417 if (!assoc) {
418 dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
419 return -EINVAL;
420 }
421
422 if (protocol == UAC_VERSION_3) {
423 int badd = assoc->bFunctionSubClass;
424
425 if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
426 (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
427 badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
428 dev_err(&dev->dev,
429 "Unsupported UAC3 BADD profile\n");
430 return -EINVAL;
431 }
432
433 chip->badd_profile = badd;
434 }
435
436 for (i = 0; i < assoc->bInterfaceCount; i++) {
437 int intf = assoc->bFirstInterface + i;
438
439 if (intf != ctrlif)
440 snd_usb_create_stream(chip, ctrlif, intf);
441 }
442
443 break;
444 }
445 }
446
447 return 0;
448 }
449
450 /*
451 * Profile name preset table
452 */
453 struct usb_audio_device_name {
454 u32 id;
455 const char *vendor_name;
456 const char *product_name;
457 const char *profile_name; /* override card->longname */
458 };
459
460 #define PROFILE_NAME(vid, pid, vendor, product, profile) \
461 { .id = USB_ID(vid, pid), .vendor_name = (vendor), \
462 .product_name = (product), .profile_name = (profile) }
463 #define DEVICE_NAME(vid, pid, vendor, product) \
464 PROFILE_NAME(vid, pid, vendor, product, NULL)
465
466 /* vendor/product and profile name presets, sorted in device id order */
467 static const struct usb_audio_device_name usb_audio_names[] = {
468 /* HP Thunderbolt Dock Audio Headset */
469 PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset",
470 "HP-Thunderbolt-Dock-Audio-Headset"),
471 /* HP Thunderbolt Dock Audio Module */
472 PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module",
473 "HP-Thunderbolt-Dock-Audio-Module"),
474
475 /* Two entries for Gigabyte TRX40 Aorus Master:
476 * TRX40 Aorus Master has two USB-audio devices, one for the front
477 * headphone with ESS SABRE9218 DAC chip, while another for the rest
478 * I/O (the rear panel and the front mic) with Realtek ALC1220-VB.
479 * Here we provide two distinct names for making UCM profiles easier.
480 */
481 PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone",
482 "Gigabyte-Aorus-Master-Front-Headphone"),
483 PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio",
484 "Gigabyte-Aorus-Master-Main-Audio"),
485
486 /* Gigabyte TRX40 Aorus Pro WiFi */
487 PROFILE_NAME(0x0414, 0xa002,
488 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
489
490 /* Creative/E-Mu devices */
491 DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"),
492 /* Creative/Toshiba Multimedia Center SB-0500 */
493 DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"),
494
495 /* Logitech Audio Devices */
496 DEVICE_NAME(0x046d, 0x0867, "Logitech, Inc.", "Logi-MeetUp"),
497 DEVICE_NAME(0x046d, 0x0874, "Logitech, Inc.", "Logi-Tap-Audio"),
498 DEVICE_NAME(0x046d, 0x087c, "Logitech, Inc.", "Logi-Huddle"),
499 DEVICE_NAME(0x046d, 0x0898, "Logitech, Inc.", "Logi-RB-Audio"),
500 DEVICE_NAME(0x046d, 0x08d2, "Logitech, Inc.", "Logi-RBM-Audio"),
501 DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"),
502
503 DEVICE_NAME(0x05e1, 0x0408, "Syntek", "STK1160"),
504 DEVICE_NAME(0x05e1, 0x0480, "Hauppauge", "Woodbury"),
505
506 /* ASUS ROG Zenith II: this machine has also two devices, one for
507 * the front headphone and another for the rest
508 */
509 PROFILE_NAME(0x0b05, 0x1915, "ASUS", "Zenith II Front Headphone",
510 "Zenith-II-Front-Headphone"),
511 PROFILE_NAME(0x0b05, 0x1916, "ASUS", "Zenith II Main Audio",
512 "Zenith-II-Main-Audio"),
513
514 /* ASUS ROG Strix */
515 PROFILE_NAME(0x0b05, 0x1917,
516 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
517 /* ASUS PRIME TRX40 PRO-S */
518 PROFILE_NAME(0x0b05, 0x1918,
519 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
520
521 /* Dell WD15 Dock */
522 PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"),
523 /* Dell WD19 Dock */
524 PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"),
525
526 DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"),
527
528 /*
529 * The original product_name is "USB Sound Device", however this name
530 * is also used by the CM106 based cards, so make it unique.
531 */
532 DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"),
533 DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"),
534
535 /* MSI TRX40 Creator */
536 PROFILE_NAME(0x0db0, 0x0d64,
537 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
538 /* MSI TRX40 */
539 PROFILE_NAME(0x0db0, 0x543d,
540 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
541
542 DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge", "HVR-950Q"),
543
544 /* Dock/Stand for HP Engage Go */
545 PROFILE_NAME(0x103c, 0x830a, "HP", "HP Engage Go Dock",
546 "HP-Engage-Go-Dock"),
547
548 /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */
549 DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"),
550 DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"),
551
552 /* aka. Serato Scratch Live DJ Box */
553 DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"),
554
555 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
556 PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear",
557 "Lenovo-ThinkStation-P620-Rear"),
558 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
559 PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main",
560 "Lenovo-ThinkStation-P620-Main"),
561
562 /* Asrock TRX40 Creator */
563 PROFILE_NAME(0x26ce, 0x0a01,
564 "Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"),
565
566 DEVICE_NAME(0x2040, 0x7200, "Hauppauge", "HVR-950Q"),
567 DEVICE_NAME(0x2040, 0x7201, "Hauppauge", "HVR-950Q-MXL"),
568 DEVICE_NAME(0x2040, 0x7210, "Hauppauge", "HVR-950Q"),
569 DEVICE_NAME(0x2040, 0x7211, "Hauppauge", "HVR-950Q-MXL"),
570 DEVICE_NAME(0x2040, 0x7213, "Hauppauge", "HVR-950Q"),
571 DEVICE_NAME(0x2040, 0x7217, "Hauppauge", "HVR-950Q"),
572 DEVICE_NAME(0x2040, 0x721b, "Hauppauge", "HVR-950Q"),
573 DEVICE_NAME(0x2040, 0x721e, "Hauppauge", "HVR-950Q"),
574 DEVICE_NAME(0x2040, 0x721f, "Hauppauge", "HVR-950Q"),
575 DEVICE_NAME(0x2040, 0x7240, "Hauppauge", "HVR-850"),
576 DEVICE_NAME(0x2040, 0x7260, "Hauppauge", "HVR-950Q"),
577 DEVICE_NAME(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
578 DEVICE_NAME(0x2040, 0x7280, "Hauppauge", "HVR-950Q"),
579 DEVICE_NAME(0x2040, 0x7281, "Hauppauge", "HVR-950Q-MXL"),
580 DEVICE_NAME(0x2040, 0x8200, "Hauppauge", "Woodbury"),
581
582 { } /* terminator */
583 };
584
585 static const struct usb_audio_device_name *
lookup_device_name(u32 id)586 lookup_device_name(u32 id)
587 {
588 static const struct usb_audio_device_name *p;
589
590 for (p = usb_audio_names; p->id; p++)
591 if (p->id == id)
592 return p;
593 return NULL;
594 }
595
596 /*
597 * free the chip instance
598 *
599 * here we have to do not much, since pcm and controls are already freed
600 *
601 */
602
snd_usb_audio_free(struct snd_card * card)603 static void snd_usb_audio_free(struct snd_card *card)
604 {
605 struct snd_usb_audio *chip = card->private_data;
606
607 snd_usb_endpoint_free_all(chip);
608 snd_usb_midi_v2_free_all(chip);
609
610 mutex_destroy(&chip->mutex);
611 if (!atomic_read(&chip->shutdown))
612 dev_set_drvdata(&chip->dev->dev, NULL);
613 }
614
usb_audio_make_shortname(struct usb_device * dev,struct snd_usb_audio * chip,const struct snd_usb_audio_quirk * quirk)615 static void usb_audio_make_shortname(struct usb_device *dev,
616 struct snd_usb_audio *chip,
617 const struct snd_usb_audio_quirk *quirk)
618 {
619 struct snd_card *card = chip->card;
620 const struct usb_audio_device_name *preset;
621 const char *s = NULL;
622
623 preset = lookup_device_name(chip->usb_id);
624 if (preset && preset->product_name)
625 s = preset->product_name;
626 else if (quirk && quirk->product_name)
627 s = quirk->product_name;
628 if (s && *s) {
629 strscpy(card->shortname, s, sizeof(card->shortname));
630 return;
631 }
632
633 /* retrieve the device string as shortname */
634 if (!dev->descriptor.iProduct ||
635 usb_string(dev, dev->descriptor.iProduct,
636 card->shortname, sizeof(card->shortname)) <= 0) {
637 /* no name available from anywhere, so use ID */
638 scnprintf(card->shortname, sizeof(card->shortname),
639 "USB Device %#04x:%#04x",
640 USB_ID_VENDOR(chip->usb_id),
641 USB_ID_PRODUCT(chip->usb_id));
642 }
643
644 strim(card->shortname);
645 }
646
usb_audio_make_longname(struct usb_device * dev,struct snd_usb_audio * chip,const struct snd_usb_audio_quirk * quirk)647 static void usb_audio_make_longname(struct usb_device *dev,
648 struct snd_usb_audio *chip,
649 const struct snd_usb_audio_quirk *quirk)
650 {
651 struct snd_card *card = chip->card;
652 const struct usb_audio_device_name *preset;
653 const char *s = NULL;
654 int len;
655
656 preset = lookup_device_name(chip->usb_id);
657
658 /* shortcut - if any pre-defined string is given, use it */
659 if (preset && preset->profile_name)
660 s = preset->profile_name;
661 if (s && *s) {
662 strscpy(card->longname, s, sizeof(card->longname));
663 return;
664 }
665
666 if (preset && preset->vendor_name)
667 s = preset->vendor_name;
668 else if (quirk && quirk->vendor_name)
669 s = quirk->vendor_name;
670 *card->longname = 0;
671 if (s && *s) {
672 strscpy(card->longname, s, sizeof(card->longname));
673 } else {
674 /* retrieve the vendor and device strings as longname */
675 if (dev->descriptor.iManufacturer)
676 usb_string(dev, dev->descriptor.iManufacturer,
677 card->longname, sizeof(card->longname));
678 /* we don't really care if there isn't any vendor string */
679 }
680 if (*card->longname) {
681 strim(card->longname);
682 if (*card->longname)
683 strlcat(card->longname, " ", sizeof(card->longname));
684 }
685
686 strlcat(card->longname, card->shortname, sizeof(card->longname));
687
688 len = strlcat(card->longname, " at ", sizeof(card->longname));
689
690 if (len < sizeof(card->longname))
691 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
692
693 switch (snd_usb_get_speed(dev)) {
694 case USB_SPEED_LOW:
695 strlcat(card->longname, ", low speed", sizeof(card->longname));
696 break;
697 case USB_SPEED_FULL:
698 strlcat(card->longname, ", full speed", sizeof(card->longname));
699 break;
700 case USB_SPEED_HIGH:
701 strlcat(card->longname, ", high speed", sizeof(card->longname));
702 break;
703 case USB_SPEED_SUPER:
704 strlcat(card->longname, ", super speed", sizeof(card->longname));
705 break;
706 case USB_SPEED_SUPER_PLUS:
707 strlcat(card->longname, ", super speed plus", sizeof(card->longname));
708 break;
709 default:
710 break;
711 }
712 }
713
snd_usb_init_quirk_flags(int idx,struct snd_usb_audio * chip)714 static void snd_usb_init_quirk_flags(int idx, struct snd_usb_audio *chip)
715 {
716 size_t i;
717
718 guard(mutex)(&quirk_flags_mutex);
719
720 /* old style option found: the position-based integer value */
721 if (quirk_flags[idx] &&
722 !kstrtou32(quirk_flags[idx], 0, &chip->quirk_flags)) {
723 snd_usb_apply_flag_dbg("module param", chip, chip->quirk_flags);
724 return;
725 }
726
727 /* take the default quirk from the quirk table */
728 snd_usb_init_quirk_flags_table(chip);
729
730 /* add or correct quirk bits from options */
731 for (i = 0; i < ARRAY_SIZE(quirk_flags); i++) {
732 if (!quirk_flags[i] || !*quirk_flags[i])
733 break;
734
735 snd_usb_init_quirk_flags_parse_string(chip, quirk_flags[i]);
736 }
737 }
738
739 /*
740 * create a chip instance and set its names.
741 */
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)742 static int snd_usb_audio_create(struct usb_interface *intf,
743 struct usb_device *dev, int idx,
744 const struct snd_usb_audio_quirk *quirk,
745 unsigned int usb_id,
746 struct snd_usb_audio **rchip)
747 {
748 struct snd_card *card;
749 struct snd_usb_audio *chip;
750 int err;
751 char component[14];
752
753 *rchip = NULL;
754
755 switch (snd_usb_get_speed(dev)) {
756 case USB_SPEED_LOW:
757 case USB_SPEED_FULL:
758 case USB_SPEED_HIGH:
759 case USB_SPEED_SUPER:
760 case USB_SPEED_SUPER_PLUS:
761 break;
762 default:
763 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
764 return -ENXIO;
765 }
766
767 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
768 sizeof(*chip), &card);
769 if (err < 0) {
770 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
771 return err;
772 }
773
774 chip = card->private_data;
775 mutex_init(&chip->mutex);
776 init_waitqueue_head(&chip->shutdown_wait);
777 chip->index = idx;
778 chip->dev = dev;
779 chip->card = card;
780 chip->setup = device_setup[idx];
781 chip->generic_implicit_fb = implicit_fb[idx];
782 chip->autoclock = autoclock;
783 chip->lowlatency = lowlatency;
784 atomic_set(&chip->active, 1); /* avoid autopm during probing */
785 atomic_set(&chip->usage_count, 0);
786 atomic_set(&chip->shutdown, 0);
787
788 chip->usb_id = usb_id;
789 INIT_LIST_HEAD(&chip->pcm_list);
790 INIT_LIST_HEAD(&chip->ep_list);
791 INIT_LIST_HEAD(&chip->iface_ref_list);
792 INIT_LIST_HEAD(&chip->clock_ref_list);
793 INIT_LIST_HEAD(&chip->midi_list);
794 INIT_LIST_HEAD(&chip->midi_v2_list);
795 INIT_LIST_HEAD(&chip->mixer_list);
796
797 snd_usb_init_quirk_flags(idx, chip);
798
799 card->private_free = snd_usb_audio_free;
800
801 strscpy(card->driver, "USB-Audio");
802 scnprintf(component, sizeof(component), "USB%04x:%04x",
803 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
804 snd_component_add(card, component);
805
806 usb_audio_make_shortname(dev, chip, quirk);
807 usb_audio_make_longname(dev, chip, quirk);
808
809 snd_usb_audio_create_proc(chip);
810
811 *rchip = chip;
812 return 0;
813 }
814
815 /* look for a matching quirk alias id */
get_alias_id(struct usb_device * dev,unsigned int * id)816 static bool get_alias_id(struct usb_device *dev, unsigned int *id)
817 {
818 int i;
819 unsigned int src, dst;
820
821 for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) {
822 if (!quirk_alias[i] ||
823 sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 ||
824 src != *id)
825 continue;
826 dev_info(&dev->dev,
827 "device (%04x:%04x): applying quirk alias %04x:%04x\n",
828 USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id),
829 USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst));
830 *id = dst;
831 return true;
832 }
833
834 return false;
835 }
836
check_delayed_register_option(struct snd_usb_audio * chip)837 static int check_delayed_register_option(struct snd_usb_audio *chip)
838 {
839 int i;
840 unsigned int id, inum;
841
842 for (i = 0; i < ARRAY_SIZE(delayed_register); i++) {
843 if (delayed_register[i] &&
844 sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 &&
845 id == chip->usb_id)
846 return inum;
847 }
848
849 return -1;
850 }
851
852 static const struct usb_device_id usb_audio_ids[]; /* defined below */
853
854 /* look for the last interface that matches with our ids and remember it */
find_last_interface(struct snd_usb_audio * chip)855 static void find_last_interface(struct snd_usb_audio *chip)
856 {
857 struct usb_host_config *config = chip->dev->actconfig;
858 struct usb_interface *intf;
859 int i;
860
861 if (!config)
862 return;
863 for (i = 0; i < config->desc.bNumInterfaces; i++) {
864 intf = config->interface[i];
865 if (usb_match_id(intf, usb_audio_ids))
866 chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber;
867 }
868 usb_audio_dbg(chip, "Found last interface = %d\n", chip->last_iface);
869 }
870
871 /* look for the corresponding quirk */
872 static const struct snd_usb_audio_quirk *
get_alias_quirk(struct usb_device * dev,unsigned int id)873 get_alias_quirk(struct usb_device *dev, unsigned int id)
874 {
875 const struct usb_device_id *p;
876
877 for (p = usb_audio_ids; p->match_flags; p++) {
878 /* FIXME: this checks only vendor:product pair in the list */
879 if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) ==
880 USB_DEVICE_ID_MATCH_DEVICE &&
881 p->idVendor == USB_ID_VENDOR(id) &&
882 p->idProduct == USB_ID_PRODUCT(id))
883 return (const struct snd_usb_audio_quirk *)p->driver_info;
884 }
885
886 return NULL;
887 }
888
889 /* register card if we reach to the last interface or to the specified
890 * one given via option
891 */
try_to_register_card(struct snd_usb_audio * chip,int ifnum)892 static int try_to_register_card(struct snd_usb_audio *chip, int ifnum)
893 {
894 struct usb_interface *iface;
895
896 if (check_delayed_register_option(chip) == ifnum ||
897 chip->last_iface == ifnum)
898 return snd_card_register(chip->card);
899
900 iface = usb_ifnum_to_if(chip->dev, chip->last_iface);
901 if (iface && usb_interface_claimed(iface))
902 return snd_card_register(chip->card);
903
904 return 0;
905 }
906
907 /*
908 * probe the active usb device
909 *
910 * note that this can be called multiple times per a device, when it
911 * includes multiple audio control interfaces.
912 *
913 * thus we check the usb device pointer and creates the card instance
914 * only at the first time. the successive calls of this function will
915 * append the pcm interface to the corresponding card.
916 */
usb_audio_probe(struct usb_interface * intf,const struct usb_device_id * usb_id)917 static int usb_audio_probe(struct usb_interface *intf,
918 const struct usb_device_id *usb_id)
919 {
920 struct usb_device *dev = interface_to_usbdev(intf);
921 const struct snd_usb_audio_quirk *quirk =
922 (const struct snd_usb_audio_quirk *)usb_id->driver_info;
923 struct snd_usb_audio *chip;
924 int i, err;
925 struct usb_host_interface *alts;
926 int ifnum;
927 u32 id;
928
929 alts = &intf->altsetting[0];
930 ifnum = get_iface_desc(alts)->bInterfaceNumber;
931 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
932 le16_to_cpu(dev->descriptor.idProduct));
933 if (get_alias_id(dev, &id))
934 quirk = get_alias_quirk(dev, id);
935 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
936 return -ENXIO;
937 if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
938 return -ENODEV;
939
940 err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
941 if (err < 0)
942 return err;
943
944 /*
945 * found a config. now register to ALSA
946 */
947
948 /* check whether it's already registered */
949 chip = NULL;
950 guard(mutex)(®ister_mutex);
951 for (i = 0; i < SNDRV_CARDS; i++) {
952 if (usb_chip[i] && usb_chip[i]->dev == dev) {
953 if (atomic_read(&usb_chip[i]->shutdown)) {
954 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
955 err = -EIO;
956 goto __error;
957 }
958 chip = usb_chip[i];
959 atomic_inc(&chip->active); /* avoid autopm */
960 break;
961 }
962 }
963 if (! chip) {
964 err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id);
965 if (err < 0)
966 goto __error;
967
968 /* it's a fresh one.
969 * now look for an empty slot and create a new card instance
970 */
971 for (i = 0; i < SNDRV_CARDS; i++)
972 if (!usb_chip[i] &&
973 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
974 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
975 if (enable[i]) {
976 err = snd_usb_audio_create(intf, dev, i, quirk,
977 id, &chip);
978 if (err < 0)
979 goto __error;
980 break;
981 } else if (vid[i] != -1 || pid[i] != -1) {
982 dev_info(&dev->dev,
983 "device (%04x:%04x) is disabled\n",
984 USB_ID_VENDOR(id),
985 USB_ID_PRODUCT(id));
986 err = -ENOENT;
987 goto __error;
988 }
989 }
990 if (!chip) {
991 dev_err(&dev->dev, "no available usb audio device\n");
992 err = -ENODEV;
993 goto __error;
994 }
995 find_last_interface(chip);
996 }
997
998 if (chip->num_interfaces >= MAX_CARD_INTERFACES) {
999 dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n");
1000 err = -EINVAL;
1001 goto __error;
1002 }
1003
1004 dev_set_drvdata(&dev->dev, chip);
1005
1006 if (ignore_ctl_error)
1007 chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR;
1008
1009 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
1010 usb_disable_autosuspend(interface_to_usbdev(intf));
1011
1012 /*
1013 * For devices with more than one control interface, we assume the
1014 * first contains the audio controls. We might need a more specific
1015 * check here in the future.
1016 */
1017 if (!chip->ctrl_intf)
1018 chip->ctrl_intf = alts;
1019
1020 err = 1; /* continue */
1021 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
1022 /* need some special handlings */
1023 err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk);
1024 if (err < 0)
1025 goto __error;
1026 }
1027
1028 if (err > 0) {
1029 /* create normal USB audio interfaces */
1030 err = snd_usb_create_streams(chip, ifnum);
1031 if (err < 0)
1032 goto __error;
1033 err = snd_usb_create_mixer(chip, ifnum);
1034 if (err < 0)
1035 goto __error;
1036 }
1037
1038 if (chip->need_delayed_register) {
1039 dev_info(&dev->dev,
1040 "Found post-registration device assignment: %08x:%02x\n",
1041 chip->usb_id, ifnum);
1042 chip->need_delayed_register = false; /* clear again */
1043 }
1044
1045 err = try_to_register_card(chip, ifnum);
1046 if (err < 0)
1047 goto __error_no_register;
1048
1049 if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) {
1050 /* don't want to fail when snd_media_device_create() fails */
1051 snd_media_device_create(chip, intf);
1052 }
1053
1054 if (quirk)
1055 chip->quirk_type = quirk->type;
1056
1057 usb_chip[chip->index] = chip;
1058 chip->intf[chip->num_interfaces] = intf;
1059 chip->num_interfaces++;
1060 usb_set_intfdata(intf, chip);
1061 atomic_dec(&chip->active);
1062
1063 if (platform_ops && platform_ops->connect_cb)
1064 platform_ops->connect_cb(chip);
1065
1066 return 0;
1067
1068 __error:
1069 /* in the case of error in secondary interface, still try to register */
1070 if (chip)
1071 try_to_register_card(chip, ifnum);
1072
1073 __error_no_register:
1074 if (chip) {
1075 /* chip->active is inside the chip->card object,
1076 * decrement before memory is possibly returned.
1077 */
1078 atomic_dec(&chip->active);
1079 if (!chip->num_interfaces)
1080 snd_card_free(chip->card);
1081 }
1082 return err;
1083 }
1084
1085 /*
1086 * we need to take care of counter, since disconnection can be called also
1087 * many times as well as usb_audio_probe().
1088 */
__usb_audio_disconnect(struct usb_interface * intf,struct snd_usb_audio * chip,struct snd_card * card)1089 static bool __usb_audio_disconnect(struct usb_interface *intf,
1090 struct snd_usb_audio *chip,
1091 struct snd_card *card)
1092 {
1093 struct list_head *p;
1094
1095 guard(mutex)(®ister_mutex);
1096
1097 if (platform_ops && platform_ops->disconnect_cb)
1098 platform_ops->disconnect_cb(chip);
1099
1100 if (atomic_inc_return(&chip->shutdown) == 1) {
1101 struct snd_usb_stream *as;
1102 struct snd_usb_endpoint *ep;
1103 struct usb_mixer_interface *mixer;
1104
1105 /* wait until all pending tasks done;
1106 * they are protected by snd_usb_lock_shutdown()
1107 */
1108 wait_event(chip->shutdown_wait,
1109 !atomic_read(&chip->usage_count));
1110 snd_card_disconnect(card);
1111 /* release the pcm resources */
1112 list_for_each_entry(as, &chip->pcm_list, list) {
1113 snd_usb_stream_disconnect(as);
1114 }
1115 /* release the endpoint resources */
1116 list_for_each_entry(ep, &chip->ep_list, list) {
1117 snd_usb_endpoint_release(ep);
1118 }
1119 /* release the midi resources */
1120 list_for_each(p, &chip->midi_list) {
1121 snd_usbmidi_disconnect(p);
1122 }
1123 snd_usb_midi_v2_disconnect_all(chip);
1124 /*
1125 * Nice to check quirk && quirk->shares_media_device and
1126 * then call the snd_media_device_delete(). Don't have
1127 * access to the quirk here. snd_media_device_delete()
1128 * accesses mixer_list
1129 */
1130 snd_media_device_delete(chip);
1131
1132 /* release mixer resources */
1133 list_for_each_entry(mixer, &chip->mixer_list, list) {
1134 snd_usb_mixer_disconnect(mixer);
1135 }
1136 }
1137
1138 if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND)
1139 usb_enable_autosuspend(interface_to_usbdev(intf));
1140
1141 chip->num_interfaces--;
1142 if (chip->num_interfaces > 0)
1143 return false;
1144
1145 usb_chip[chip->index] = NULL;
1146 return true;
1147 }
1148
usb_audio_disconnect(struct usb_interface * intf)1149 static void usb_audio_disconnect(struct usb_interface *intf)
1150 {
1151 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1152 struct snd_card *card;
1153
1154 if (chip == USB_AUDIO_IFACE_UNUSED)
1155 return;
1156
1157 card = chip->card;
1158 if (__usb_audio_disconnect(intf, chip, card))
1159 snd_card_free_when_closed(card);
1160 }
1161
1162 /* lock the shutdown (disconnect) task and autoresume */
snd_usb_lock_shutdown(struct snd_usb_audio * chip)1163 int snd_usb_lock_shutdown(struct snd_usb_audio *chip)
1164 {
1165 int err;
1166
1167 atomic_inc(&chip->usage_count);
1168 if (atomic_read(&chip->shutdown)) {
1169 err = -EIO;
1170 goto error;
1171 }
1172 err = snd_usb_autoresume(chip);
1173 if (err < 0)
1174 goto error;
1175 return 0;
1176
1177 error:
1178 if (atomic_dec_and_test(&chip->usage_count))
1179 wake_up(&chip->shutdown_wait);
1180 return err;
1181 }
1182 EXPORT_SYMBOL_GPL(snd_usb_lock_shutdown);
1183
1184 /* autosuspend and unlock the shutdown */
snd_usb_unlock_shutdown(struct snd_usb_audio * chip)1185 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip)
1186 {
1187 snd_usb_autosuspend(chip);
1188 if (atomic_dec_and_test(&chip->usage_count))
1189 wake_up(&chip->shutdown_wait);
1190 }
1191 EXPORT_SYMBOL_GPL(snd_usb_unlock_shutdown);
1192
snd_usb_autoresume(struct snd_usb_audio * chip)1193 int snd_usb_autoresume(struct snd_usb_audio *chip)
1194 {
1195 int i, err;
1196
1197 if (atomic_read(&chip->shutdown))
1198 return -EIO;
1199 if (atomic_inc_return(&chip->active) != 1)
1200 return 0;
1201
1202 for (i = 0; i < chip->num_interfaces; i++) {
1203 err = usb_autopm_get_interface(chip->intf[i]);
1204 if (err < 0) {
1205 /* rollback */
1206 while (--i >= 0)
1207 usb_autopm_put_interface(chip->intf[i]);
1208 atomic_dec(&chip->active);
1209 return err;
1210 }
1211 }
1212 return 0;
1213 }
1214 EXPORT_SYMBOL_GPL(snd_usb_autoresume);
1215
snd_usb_autosuspend(struct snd_usb_audio * chip)1216 void snd_usb_autosuspend(struct snd_usb_audio *chip)
1217 {
1218 int i;
1219
1220 if (atomic_read(&chip->shutdown))
1221 return;
1222 if (!atomic_dec_and_test(&chip->active))
1223 return;
1224
1225 for (i = 0; i < chip->num_interfaces; i++)
1226 usb_autopm_put_interface(chip->intf[i]);
1227 }
1228 EXPORT_SYMBOL_GPL(snd_usb_autosuspend);
1229
usb_audio_suspend(struct usb_interface * intf,pm_message_t message)1230 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
1231 {
1232 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1233 struct snd_usb_stream *as;
1234 struct snd_usb_endpoint *ep;
1235 struct usb_mixer_interface *mixer;
1236 struct list_head *p;
1237
1238 if (chip == USB_AUDIO_IFACE_UNUSED)
1239 return 0;
1240
1241 if (!chip->num_suspended_intf++) {
1242 list_for_each_entry(as, &chip->pcm_list, list)
1243 snd_usb_pcm_suspend(as);
1244 list_for_each_entry(ep, &chip->ep_list, list)
1245 snd_usb_endpoint_suspend(ep);
1246 list_for_each(p, &chip->midi_list)
1247 snd_usbmidi_suspend(p);
1248 list_for_each_entry(mixer, &chip->mixer_list, list)
1249 snd_usb_mixer_suspend(mixer);
1250 snd_usb_midi_v2_suspend_all(chip);
1251 }
1252
1253 if (!PMSG_IS_AUTO(message) && !chip->system_suspend) {
1254 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1255 chip->system_suspend = chip->num_suspended_intf;
1256 }
1257
1258 if (platform_ops && platform_ops->suspend_cb)
1259 platform_ops->suspend_cb(intf, message);
1260
1261 return 0;
1262 }
1263
usb_audio_resume(struct usb_interface * intf)1264 static int usb_audio_resume(struct usb_interface *intf)
1265 {
1266 struct snd_usb_audio *chip = usb_get_intfdata(intf);
1267 struct snd_usb_stream *as;
1268 struct usb_mixer_interface *mixer;
1269 struct list_head *p;
1270 int err = 0;
1271
1272 if (chip == USB_AUDIO_IFACE_UNUSED)
1273 return 0;
1274
1275 atomic_inc(&chip->active); /* avoid autopm */
1276 if (chip->num_suspended_intf > 1)
1277 goto out;
1278
1279 list_for_each_entry(as, &chip->pcm_list, list) {
1280 err = snd_usb_pcm_resume(as);
1281 if (err < 0)
1282 goto err_out;
1283 }
1284
1285 /*
1286 * ALSA leaves material resumption to user space
1287 * we just notify and restart the mixers
1288 */
1289 list_for_each_entry(mixer, &chip->mixer_list, list) {
1290 err = snd_usb_mixer_resume(mixer);
1291 if (err < 0)
1292 goto err_out;
1293 }
1294
1295 list_for_each(p, &chip->midi_list) {
1296 snd_usbmidi_resume(p);
1297 }
1298
1299 snd_usb_midi_v2_resume_all(chip);
1300
1301 if (platform_ops && platform_ops->resume_cb)
1302 platform_ops->resume_cb(intf);
1303
1304 out:
1305 if (chip->num_suspended_intf == chip->system_suspend) {
1306 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1307 chip->system_suspend = 0;
1308 }
1309 chip->num_suspended_intf--;
1310
1311 err_out:
1312 atomic_dec(&chip->active); /* allow autopm after this point */
1313 return err;
1314 }
1315
1316 static const struct usb_device_id usb_audio_ids [] = {
1317 #include "quirks-table.h"
1318 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1319 .bInterfaceClass = USB_CLASS_AUDIO,
1320 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
1321 { } /* Terminating entry */
1322 };
1323 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
1324
1325 /*
1326 * entry point for linux usb interface
1327 */
1328
1329 static struct usb_driver usb_audio_driver = {
1330 .name = "snd-usb-audio",
1331 .probe = usb_audio_probe,
1332 .disconnect = usb_audio_disconnect,
1333 .suspend = usb_audio_suspend,
1334 .resume = usb_audio_resume,
1335 .reset_resume = usb_audio_resume,
1336 .id_table = usb_audio_ids,
1337 .supports_autosuspend = 1,
1338 };
1339
1340 module_usb_driver(usb_audio_driver);
1341