blob: 220c6167dd86d5ed2164db0c73b97afac1ba6ec5 [file] [log] [blame]
Daniel Macke5779992010-03-04 19:46:13 +01001/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
5 *
6 * Many codes borrowed from audio.c by
7 * Alan Cox (alan@lxorguk.ukuu.org.uk)
8 * Thomas Sailer (sailer@ife.ee.ethz.ch)
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 *
26 * NOTES:
27 *
28 * - async unlink should be used for avoiding the sleep inside lock.
29 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
30 * oops. in such a cse, pass async_unlink=0 option.
31 * - the linked URBs would be preferred but not used so far because of
32 * the instability of unlinking.
33 * - type II is not supported properly. there is no device which supports
34 * this type *correctly*. SB extigy looks as if it supports, but it's
35 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
36 */
37
38
39#include <linux/bitops.h>
40#include <linux/init.h>
41#include <linux/list.h>
42#include <linux/slab.h>
43#include <linux/string.h>
Takashi Iwai3ffc1222011-03-21 12:00:00 +010044#include <linux/ctype.h>
Daniel Macke5779992010-03-04 19:46:13 +010045#include <linux/usb.h>
46#include <linux/moduleparam.h>
47#include <linux/mutex.h>
48#include <linux/usb/audio.h>
Daniel Mack7e847892010-03-11 21:13:20 +010049#include <linux/usb/audio-v2.h>
Daniel Macke5779992010-03-04 19:46:13 +010050
Daniel Mack9e386582011-05-25 09:09:01 +020051#include <sound/control.h>
Daniel Macke5779992010-03-04 19:46:13 +010052#include <sound/core.h>
53#include <sound/info.h>
54#include <sound/pcm.h>
55#include <sound/pcm_params.h>
56#include <sound/initval.h>
57
58#include "usbaudio.h"
59#include "card.h"
60#include "midi.h"
Daniel Mackf0b5e632010-03-11 21:13:23 +010061#include "mixer.h"
Daniel Macke5779992010-03-04 19:46:13 +010062#include "proc.h"
63#include "quirks.h"
64#include "endpoint.h"
65#include "helper.h"
66#include "debug.h"
67#include "pcm.h"
68#include "urb.h"
69#include "format.h"
Oliver Neukum88a85162011-03-11 14:51:12 +010070#include "power.h"
Daniel Macke5779992010-03-04 19:46:13 +010071
72MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
73MODULE_DESCRIPTION("USB Audio");
74MODULE_LICENSE("GPL");
75MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
76
77
78static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
79static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
80static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
81/* Vendor/product IDs for this card */
82static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
83static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
84static int nrpacks = 8; /* max. number of packets per urb */
85static int async_unlink = 1;
86static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
87static int ignore_ctl_error;
88
89module_param_array(index, int, NULL, 0444);
90MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
91module_param_array(id, charp, NULL, 0444);
92MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
93module_param_array(enable, bool, NULL, 0444);
94MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
95module_param_array(vid, int, NULL, 0444);
96MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
97module_param_array(pid, int, NULL, 0444);
98MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
99module_param(nrpacks, int, 0644);
100MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
101module_param(async_unlink, bool, 0444);
102MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
103module_param_array(device_setup, int, NULL, 0444);
104MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
105module_param(ignore_ctl_error, bool, 0444);
106MODULE_PARM_DESC(ignore_ctl_error,
107 "Ignore errors from USB controller for mixer interfaces.");
108
109/*
110 * we keep the snd_usb_audio_t instances by ourselves for merging
111 * the all interfaces on the same card as one sound device.
112 */
113
114static DEFINE_MUTEX(register_mutex);
115static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
116static struct usb_driver usb_audio_driver;
117
118/*
119 * disconnect streams
120 * called from snd_usb_audio_disconnect()
121 */
122static void snd_usb_stream_disconnect(struct list_head *head)
123{
124 int idx;
125 struct snd_usb_stream *as;
126 struct snd_usb_substream *subs;
127
128 as = list_entry(head, struct snd_usb_stream, list);
129 for (idx = 0; idx < 2; idx++) {
130 subs = &as->substream[idx];
131 if (!subs->num_formats)
Takashi Iwai76195fb2010-09-08 08:27:02 +0200132 continue;
Daniel Macke5779992010-03-04 19:46:13 +0100133 snd_usb_release_substream_urbs(subs, 1);
134 subs->interface = -1;
135 }
136}
137
138static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
139{
140 struct usb_device *dev = chip->dev;
141 struct usb_host_interface *alts;
142 struct usb_interface_descriptor *altsd;
143 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
144
145 if (!iface) {
146 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
147 dev->devnum, ctrlif, interface);
148 return -EINVAL;
149 }
150
151 if (usb_interface_claimed(iface)) {
152 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
153 dev->devnum, ctrlif, interface);
154 return -EINVAL;
155 }
156
157 alts = &iface->altsetting[0];
158 altsd = get_iface_desc(alts);
159 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
160 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
161 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
162 int err = snd_usbmidi_create(chip->card, iface,
163 &chip->midi_list, NULL);
164 if (err < 0) {
165 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
166 dev->devnum, ctrlif, interface);
167 return -EINVAL;
168 }
169 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
170
171 return 0;
172 }
173
174 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
175 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
176 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
177 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
178 dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
179 /* skip non-supported classes */
180 return -EINVAL;
181 }
182
183 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
184 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
185 return -EINVAL;
186 }
187
188 if (! snd_usb_parse_audio_endpoints(chip, interface)) {
189 usb_set_interface(dev, interface, 0); /* reset the current interface */
190 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
191 return -EINVAL;
192 }
193
194 return 0;
195}
196
197/*
198 * parse audio control descriptor and create pcm/midi streams
199 */
200static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
201{
202 struct usb_device *dev = chip->dev;
203 struct usb_host_interface *host_iface;
204 struct usb_interface_descriptor *altsd;
205 void *control_header;
206 int i, protocol;
207
208 /* find audiocontrol interface */
209 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
210 control_header = snd_usb_find_csint_desc(host_iface->extra,
211 host_iface->extralen,
212 NULL, UAC_HEADER);
213 altsd = get_iface_desc(host_iface);
214 protocol = altsd->bInterfaceProtocol;
215
216 if (!control_header) {
217 snd_printk(KERN_ERR "cannot find UAC_HEADER\n");
218 return -EINVAL;
219 }
220
221 switch (protocol) {
Clemens Ladischa2acad82010-09-03 10:53:11 +0200222 default:
223 snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n",
224 protocol);
225 /* fall through */
226
Daniel Macke5779992010-03-04 19:46:13 +0100227 case UAC_VERSION_1: {
Daniel Mack69da9bc2010-06-16 17:57:28 +0200228 struct uac1_ac_header_descriptor *h1 = control_header;
Daniel Macke5779992010-03-04 19:46:13 +0100229
230 if (!h1->bInCollection) {
231 snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
232 return -EINVAL;
233 }
234
235 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
236 snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n");
237 return -EINVAL;
238 }
239
240 for (i = 0; i < h1->bInCollection; i++)
241 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
242
243 break;
244 }
245
246 case UAC_VERSION_2: {
Daniel Macke5779992010-03-04 19:46:13 +0100247 struct usb_interface_assoc_descriptor *assoc =
248 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
249
250 if (!assoc) {
251 snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
252 return -EINVAL;
253 }
254
Daniel Macke5779992010-03-04 19:46:13 +0100255 for (i = 0; i < assoc->bInterfaceCount; i++) {
256 int intf = assoc->bFirstInterface + i;
257
258 if (intf != ctrlif)
259 snd_usb_create_stream(chip, ctrlif, intf);
260 }
261
262 break;
263 }
Daniel Macke5779992010-03-04 19:46:13 +0100264 }
265
266 return 0;
267}
268
269/*
270 * free the chip instance
271 *
272 * here we have to do not much, since pcm and controls are already freed
273 *
274 */
275
276static int snd_usb_audio_free(struct snd_usb_audio *chip)
277{
278 kfree(chip);
279 return 0;
280}
281
282static int snd_usb_audio_dev_free(struct snd_device *device)
283{
284 struct snd_usb_audio *chip = device->device_data;
285 return snd_usb_audio_free(chip);
286}
287
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100288static void remove_trailing_spaces(char *str)
289{
290 char *p;
291
292 if (!*str)
293 return;
294 for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
295 *p = 0;
296}
Daniel Macke5779992010-03-04 19:46:13 +0100297
298/*
299 * create a chip instance and set its names.
300 */
301static int snd_usb_audio_create(struct usb_device *dev, int idx,
302 const struct snd_usb_audio_quirk *quirk,
303 struct snd_usb_audio **rchip)
304{
305 struct snd_card *card;
306 struct snd_usb_audio *chip;
307 int err, len;
308 char component[14];
309 static struct snd_device_ops ops = {
310 .dev_free = snd_usb_audio_dev_free,
311 };
312
313 *rchip = NULL;
314
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700315 switch (snd_usb_get_speed(dev)) {
316 case USB_SPEED_LOW:
317 case USB_SPEED_FULL:
318 case USB_SPEED_HIGH:
319 case USB_SPEED_SUPER:
320 break;
321 default:
Daniel Macke5779992010-03-04 19:46:13 +0100322 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
323 return -ENXIO;
324 }
325
326 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
327 if (err < 0) {
328 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
329 return err;
330 }
331
332 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
333 if (! chip) {
334 snd_card_free(card);
335 return -ENOMEM;
336 }
337
Takashi Iwai382225e2011-02-22 10:21:18 +0100338 mutex_init(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100339 chip->index = idx;
340 chip->dev = dev;
341 chip->card = card;
342 chip->setup = device_setup[idx];
343 chip->nrpacks = nrpacks;
344 chip->async_unlink = async_unlink;
Oliver Neukum88a85162011-03-11 14:51:12 +0100345 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100346
347 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
348 le16_to_cpu(dev->descriptor.idProduct));
349 INIT_LIST_HEAD(&chip->pcm_list);
350 INIT_LIST_HEAD(&chip->midi_list);
351 INIT_LIST_HEAD(&chip->mixer_list);
352
353 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
354 snd_usb_audio_free(chip);
355 snd_card_free(card);
356 return err;
357 }
358
359 strcpy(card->driver, "USB-Audio");
360 sprintf(component, "USB%04x:%04x",
361 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
362 snd_component_add(card, component);
363
364 /* retrieve the device string as shortname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100365 if (quirk && quirk->product_name && *quirk->product_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100366 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
367 } else {
368 if (!dev->descriptor.iProduct ||
369 usb_string(dev, dev->descriptor.iProduct,
370 card->shortname, sizeof(card->shortname)) <= 0) {
371 /* no name available from anywhere, so use ID */
372 sprintf(card->shortname, "USB Device %#04x:%#04x",
373 USB_ID_VENDOR(chip->usb_id),
374 USB_ID_PRODUCT(chip->usb_id));
375 }
376 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100377 remove_trailing_spaces(card->shortname);
Daniel Macke5779992010-03-04 19:46:13 +0100378
379 /* retrieve the vendor and device strings as longname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100380 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100381 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
382 } else {
383 if (dev->descriptor.iManufacturer)
384 len = usb_string(dev, dev->descriptor.iManufacturer,
385 card->longname, sizeof(card->longname));
386 else
387 len = 0;
388 /* we don't really care if there isn't any vendor string */
389 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100390 if (len > 0) {
391 remove_trailing_spaces(card->longname);
392 if (*card->longname)
393 strlcat(card->longname, " ", sizeof(card->longname));
394 }
Daniel Macke5779992010-03-04 19:46:13 +0100395
396 strlcat(card->longname, card->shortname, sizeof(card->longname));
397
398 len = strlcat(card->longname, " at ", sizeof(card->longname));
399
400 if (len < sizeof(card->longname))
401 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
402
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700403 switch (snd_usb_get_speed(dev)) {
404 case USB_SPEED_LOW:
405 strlcat(card->longname, ", low speed", sizeof(card->longname));
406 break;
407 case USB_SPEED_FULL:
408 strlcat(card->longname, ", full speed", sizeof(card->longname));
409 break;
410 case USB_SPEED_HIGH:
411 strlcat(card->longname, ", high speed", sizeof(card->longname));
412 break;
413 case USB_SPEED_SUPER:
414 strlcat(card->longname, ", super speed", sizeof(card->longname));
415 break;
416 default:
417 break;
418 }
Daniel Macke5779992010-03-04 19:46:13 +0100419
420 snd_usb_audio_create_proc(chip);
421
422 *rchip = chip;
423 return 0;
424}
425
426/*
427 * probe the active usb device
428 *
429 * note that this can be called multiple times per a device, when it
430 * includes multiple audio control interfaces.
431 *
432 * thus we check the usb device pointer and creates the card instance
433 * only at the first time. the successive calls of this function will
434 * append the pcm interface to the corresponding card.
435 */
436static void *snd_usb_audio_probe(struct usb_device *dev,
437 struct usb_interface *intf,
438 const struct usb_device_id *usb_id)
439{
440 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
441 int i, err;
442 struct snd_usb_audio *chip;
443 struct usb_host_interface *alts;
444 int ifnum;
445 u32 id;
446
447 alts = &intf->altsetting[0];
448 ifnum = get_iface_desc(alts)->bInterfaceNumber;
449 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
450 le16_to_cpu(dev->descriptor.idProduct));
451 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
452 goto __err_val;
453
454 if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
455 goto __err_val;
456
457 /*
458 * found a config. now register to ALSA
459 */
460
461 /* check whether it's already registered */
462 chip = NULL;
463 mutex_lock(&register_mutex);
464 for (i = 0; i < SNDRV_CARDS; i++) {
465 if (usb_chip[i] && usb_chip[i]->dev == dev) {
466 if (usb_chip[i]->shutdown) {
467 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
468 goto __error;
469 }
470 chip = usb_chip[i];
Oliver Neukum88a85162011-03-11 14:51:12 +0100471 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100472 break;
473 }
474 }
475 if (! chip) {
476 /* it's a fresh one.
477 * now look for an empty slot and create a new card instance
478 */
479 for (i = 0; i < SNDRV_CARDS; i++)
480 if (enable[i] && ! usb_chip[i] &&
481 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
482 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
483 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
484 goto __error;
485 }
486 snd_card_set_dev(chip->card, &intf->dev);
Oliver Neukum88a85162011-03-11 14:51:12 +0100487 chip->pm_intf = intf;
Daniel Macke5779992010-03-04 19:46:13 +0100488 break;
489 }
490 if (!chip) {
491 printk(KERN_ERR "no available usb audio device\n");
492 goto __error;
493 }
494 }
495
Daniel Mack7b6717e2010-09-02 17:13:15 +0800496 /*
497 * For devices with more than one control interface, we assume the
498 * first contains the audio controls. We might need a more specific
499 * check here in the future.
500 */
501 if (!chip->ctrl_intf)
502 chip->ctrl_intf = alts;
Daniel Mack79f920f2010-05-31 14:51:31 +0200503
Daniel Mack5875c2c2011-05-25 09:08:59 +0200504 chip->txfr_quirk = 0;
505 err = 1; /* continue */
506 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
507 /* need some special handlings */
508 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
509 goto __error;
510 }
511
Daniel Macke5779992010-03-04 19:46:13 +0100512 if (err > 0) {
513 /* create normal USB audio interfaces */
514 if (snd_usb_create_streams(chip, ifnum) < 0 ||
515 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
516 goto __error;
517 }
518 }
519
520 /* we are allowed to call snd_card_register() many times */
521 if (snd_card_register(chip->card) < 0) {
522 goto __error;
523 }
524
525 usb_chip[chip->index] = chip;
526 chip->num_interfaces++;
Oliver Neukum88a85162011-03-11 14:51:12 +0100527 chip->probing = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100528 mutex_unlock(&register_mutex);
529 return chip;
530
531 __error:
532 if (chip && !chip->num_interfaces)
533 snd_card_free(chip->card);
534 mutex_unlock(&register_mutex);
535 __err_val:
536 return NULL;
537}
538
539/*
540 * we need to take care of counter, since disconnection can be called also
541 * many times as well as usb_audio_probe().
542 */
543static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
544{
545 struct snd_usb_audio *chip;
546 struct snd_card *card;
547 struct list_head *p;
548
549 if (ptr == (void *)-1L)
550 return;
551
552 chip = ptr;
553 card = chip->card;
554 mutex_lock(&register_mutex);
Takashi Iwai382225e2011-02-22 10:21:18 +0100555 mutex_lock(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100556 chip->shutdown = 1;
557 chip->num_interfaces--;
558 if (chip->num_interfaces <= 0) {
559 snd_card_disconnect(card);
560 /* release the pcm resources */
561 list_for_each(p, &chip->pcm_list) {
562 snd_usb_stream_disconnect(p);
563 }
564 /* release the midi resources */
565 list_for_each(p, &chip->midi_list) {
566 snd_usbmidi_disconnect(p);
567 }
568 /* release mixer resources */
569 list_for_each(p, &chip->mixer_list) {
570 snd_usb_mixer_disconnect(p);
571 }
572 usb_chip[chip->index] = NULL;
Takashi Iwai382225e2011-02-22 10:21:18 +0100573 mutex_unlock(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100574 mutex_unlock(&register_mutex);
575 snd_card_free_when_closed(card);
576 } else {
Takashi Iwai382225e2011-02-22 10:21:18 +0100577 mutex_unlock(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100578 mutex_unlock(&register_mutex);
579 }
580}
581
582/*
583 * new 2.5 USB kernel API
584 */
585static int usb_audio_probe(struct usb_interface *intf,
586 const struct usb_device_id *id)
587{
588 void *chip;
589 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
590 if (chip) {
591 usb_set_intfdata(intf, chip);
592 return 0;
593 } else
594 return -EIO;
595}
596
597static void usb_audio_disconnect(struct usb_interface *intf)
598{
599 snd_usb_audio_disconnect(interface_to_usbdev(intf),
600 usb_get_intfdata(intf));
601}
602
603#ifdef CONFIG_PM
Oliver Neukum88a85162011-03-11 14:51:12 +0100604
605int snd_usb_autoresume(struct snd_usb_audio *chip)
606{
607 int err = -ENODEV;
608
609 if (!chip->shutdown && !chip->probing)
610 err = usb_autopm_get_interface(chip->pm_intf);
611
612 return err;
613}
614
615void snd_usb_autosuspend(struct snd_usb_audio *chip)
616{
617 if (!chip->shutdown && !chip->probing)
618 usb_autopm_put_interface(chip->pm_intf);
619}
620
Daniel Macke5779992010-03-04 19:46:13 +0100621static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
622{
623 struct snd_usb_audio *chip = usb_get_intfdata(intf);
624 struct list_head *p;
625 struct snd_usb_stream *as;
Oliver Neukumedf7de32011-03-11 13:19:43 +0100626 struct usb_mixer_interface *mixer;
Daniel Macke5779992010-03-04 19:46:13 +0100627
628 if (chip == (void *)-1L)
629 return 0;
630
Oliver Neukum88a85162011-03-11 14:51:12 +0100631 if (!(message.event & PM_EVENT_AUTO)) {
632 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
633 if (!chip->num_suspended_intf++) {
634 list_for_each(p, &chip->pcm_list) {
635 as = list_entry(p, struct snd_usb_stream, list);
636 snd_pcm_suspend_all(as->pcm);
637 }
638 }
639 } else {
640 /*
641 * otherwise we keep the rest of the system in the dark
642 * to keep this transparent
643 */
644 if (!chip->num_suspended_intf++)
645 chip->autosuspended = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100646 }
647
Oliver Neukum88a85162011-03-11 14:51:12 +0100648 list_for_each_entry(mixer, &chip->mixer_list, list)
649 snd_usb_mixer_inactivate(mixer);
650
Daniel Macke5779992010-03-04 19:46:13 +0100651 return 0;
652}
653
654static int usb_audio_resume(struct usb_interface *intf)
655{
656 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Oliver Neukumedf7de32011-03-11 13:19:43 +0100657 struct usb_mixer_interface *mixer;
Oliver Neukum88a85162011-03-11 14:51:12 +0100658 int err = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100659
660 if (chip == (void *)-1L)
661 return 0;
662 if (--chip->num_suspended_intf)
663 return 0;
664 /*
665 * ALSA leaves material resumption to user space
Oliver Neukumedf7de32011-03-11 13:19:43 +0100666 * we just notify and restart the mixers
Daniel Macke5779992010-03-04 19:46:13 +0100667 */
Oliver Neukum88a85162011-03-11 14:51:12 +0100668 list_for_each_entry(mixer, &chip->mixer_list, list) {
669 err = snd_usb_mixer_activate(mixer);
670 if (err < 0)
671 goto err_out;
672 }
Daniel Macke5779992010-03-04 19:46:13 +0100673
Oliver Neukum88a85162011-03-11 14:51:12 +0100674 if (!chip->autosuspended)
675 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
676 chip->autosuspended = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100677
Oliver Neukum88a85162011-03-11 14:51:12 +0100678err_out:
679 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100680}
Randy Dunlap6407d472010-03-22 08:55:35 -0700681#else
682#define usb_audio_suspend NULL
683#define usb_audio_resume NULL
Daniel Macke5779992010-03-04 19:46:13 +0100684#endif /* CONFIG_PM */
685
686static struct usb_device_id usb_audio_ids [] = {
687#include "quirks-table.h"
688 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
689 .bInterfaceClass = USB_CLASS_AUDIO,
690 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
691 { } /* Terminating entry */
692};
693
694MODULE_DEVICE_TABLE (usb, usb_audio_ids);
695
696/*
697 * entry point for linux usb interface
698 */
699
700static struct usb_driver usb_audio_driver = {
701 .name = "snd-usb-audio",
702 .probe = usb_audio_probe,
703 .disconnect = usb_audio_disconnect,
704 .suspend = usb_audio_suspend,
705 .resume = usb_audio_resume,
706 .id_table = usb_audio_ids,
Oliver Neukum88a85162011-03-11 14:51:12 +0100707 .supports_autosuspend = 1,
Daniel Macke5779992010-03-04 19:46:13 +0100708};
709
710static int __init snd_usb_audio_init(void)
711{
712 if (nrpacks < 1 || nrpacks > MAX_PACKS) {
713 printk(KERN_WARNING "invalid nrpacks value.\n");
714 return -EINVAL;
715 }
716 return usb_register(&usb_audio_driver);
717}
718
719static void __exit snd_usb_audio_cleanup(void)
720{
721 usb_deregister(&usb_audio_driver);
722}
723
724module_init(snd_usb_audio_init);
725module_exit(snd_usb_audio_cleanup);