blob: a90662af2d6bbd7b2df46d17cb1da01ee849d29c [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
51#include <sound/core.h>
52#include <sound/info.h>
53#include <sound/pcm.h>
54#include <sound/pcm_params.h>
55#include <sound/initval.h>
56
57#include "usbaudio.h"
58#include "card.h"
59#include "midi.h"
Daniel Mackf0b5e632010-03-11 21:13:23 +010060#include "mixer.h"
Daniel Macke5779992010-03-04 19:46:13 +010061#include "proc.h"
62#include "quirks.h"
63#include "endpoint.h"
64#include "helper.h"
65#include "debug.h"
66#include "pcm.h"
67#include "urb.h"
68#include "format.h"
Oliver Neukum88a85162011-03-11 14:51:12 +010069#include "power.h"
Daniel Macke5779992010-03-04 19:46:13 +010070
71MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
72MODULE_DESCRIPTION("USB Audio");
73MODULE_LICENSE("GPL");
74MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
75
76
77static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
78static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
79static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
80/* Vendor/product IDs for this card */
81static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
82static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
83static int nrpacks = 8; /* max. number of packets per urb */
84static int async_unlink = 1;
85static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
86static int ignore_ctl_error;
87
88module_param_array(index, int, NULL, 0444);
89MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
90module_param_array(id, charp, NULL, 0444);
91MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
92module_param_array(enable, bool, NULL, 0444);
93MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
94module_param_array(vid, int, NULL, 0444);
95MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
96module_param_array(pid, int, NULL, 0444);
97MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
98module_param(nrpacks, int, 0644);
99MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
100module_param(async_unlink, bool, 0444);
101MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
102module_param_array(device_setup, int, NULL, 0444);
103MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
104module_param(ignore_ctl_error, bool, 0444);
105MODULE_PARM_DESC(ignore_ctl_error,
106 "Ignore errors from USB controller for mixer interfaces.");
107
108/*
109 * we keep the snd_usb_audio_t instances by ourselves for merging
110 * the all interfaces on the same card as one sound device.
111 */
112
113static DEFINE_MUTEX(register_mutex);
114static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
115static struct usb_driver usb_audio_driver;
116
117/*
118 * disconnect streams
119 * called from snd_usb_audio_disconnect()
120 */
121static void snd_usb_stream_disconnect(struct list_head *head)
122{
123 int idx;
124 struct snd_usb_stream *as;
125 struct snd_usb_substream *subs;
126
127 as = list_entry(head, struct snd_usb_stream, list);
128 for (idx = 0; idx < 2; idx++) {
129 subs = &as->substream[idx];
130 if (!subs->num_formats)
Takashi Iwai76195fb2010-09-08 08:27:02 +0200131 continue;
Daniel Macke5779992010-03-04 19:46:13 +0100132 snd_usb_release_substream_urbs(subs, 1);
133 subs->interface = -1;
134 }
135}
136
137static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
138{
139 struct usb_device *dev = chip->dev;
140 struct usb_host_interface *alts;
141 struct usb_interface_descriptor *altsd;
142 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
143
144 if (!iface) {
145 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
146 dev->devnum, ctrlif, interface);
147 return -EINVAL;
148 }
149
150 if (usb_interface_claimed(iface)) {
151 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
152 dev->devnum, ctrlif, interface);
153 return -EINVAL;
154 }
155
156 alts = &iface->altsetting[0];
157 altsd = get_iface_desc(alts);
158 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
159 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
160 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
161 int err = snd_usbmidi_create(chip->card, iface,
162 &chip->midi_list, NULL);
163 if (err < 0) {
164 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
165 dev->devnum, ctrlif, interface);
166 return -EINVAL;
167 }
168 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
169
170 return 0;
171 }
172
173 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
174 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
175 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
176 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
177 dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
178 /* skip non-supported classes */
179 return -EINVAL;
180 }
181
182 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
183 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
184 return -EINVAL;
185 }
186
187 if (! snd_usb_parse_audio_endpoints(chip, interface)) {
188 usb_set_interface(dev, interface, 0); /* reset the current interface */
189 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
190 return -EINVAL;
191 }
192
193 return 0;
194}
195
196/*
197 * parse audio control descriptor and create pcm/midi streams
198 */
199static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
200{
201 struct usb_device *dev = chip->dev;
202 struct usb_host_interface *host_iface;
203 struct usb_interface_descriptor *altsd;
204 void *control_header;
205 int i, protocol;
206
207 /* find audiocontrol interface */
208 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
209 control_header = snd_usb_find_csint_desc(host_iface->extra,
210 host_iface->extralen,
211 NULL, UAC_HEADER);
212 altsd = get_iface_desc(host_iface);
213 protocol = altsd->bInterfaceProtocol;
214
215 if (!control_header) {
216 snd_printk(KERN_ERR "cannot find UAC_HEADER\n");
217 return -EINVAL;
218 }
219
220 switch (protocol) {
Clemens Ladischa2acad82010-09-03 10:53:11 +0200221 default:
222 snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n",
223 protocol);
224 /* fall through */
225
Daniel Macke5779992010-03-04 19:46:13 +0100226 case UAC_VERSION_1: {
Daniel Mack69da9bc2010-06-16 17:57:28 +0200227 struct uac1_ac_header_descriptor *h1 = control_header;
Daniel Macke5779992010-03-04 19:46:13 +0100228
229 if (!h1->bInCollection) {
230 snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
231 return -EINVAL;
232 }
233
234 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
235 snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n");
236 return -EINVAL;
237 }
238
239 for (i = 0; i < h1->bInCollection; i++)
240 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
241
242 break;
243 }
244
245 case UAC_VERSION_2: {
Daniel Macke5779992010-03-04 19:46:13 +0100246 struct usb_interface_assoc_descriptor *assoc =
247 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
248
249 if (!assoc) {
250 snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
251 return -EINVAL;
252 }
253
Daniel Macke5779992010-03-04 19:46:13 +0100254 for (i = 0; i < assoc->bInterfaceCount; i++) {
255 int intf = assoc->bFirstInterface + i;
256
257 if (intf != ctrlif)
258 snd_usb_create_stream(chip, ctrlif, intf);
259 }
260
261 break;
262 }
Daniel Macke5779992010-03-04 19:46:13 +0100263 }
264
265 return 0;
266}
267
268/*
269 * free the chip instance
270 *
271 * here we have to do not much, since pcm and controls are already freed
272 *
273 */
274
275static int snd_usb_audio_free(struct snd_usb_audio *chip)
276{
277 kfree(chip);
278 return 0;
279}
280
281static int snd_usb_audio_dev_free(struct snd_device *device)
282{
283 struct snd_usb_audio *chip = device->device_data;
284 return snd_usb_audio_free(chip);
285}
286
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100287static void remove_trailing_spaces(char *str)
288{
289 char *p;
290
291 if (!*str)
292 return;
293 for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
294 *p = 0;
295}
Daniel Macke5779992010-03-04 19:46:13 +0100296
297/*
298 * create a chip instance and set its names.
299 */
300static int snd_usb_audio_create(struct usb_device *dev, int idx,
301 const struct snd_usb_audio_quirk *quirk,
302 struct snd_usb_audio **rchip)
303{
304 struct snd_card *card;
305 struct snd_usb_audio *chip;
306 int err, len;
307 char component[14];
308 static struct snd_device_ops ops = {
309 .dev_free = snd_usb_audio_dev_free,
310 };
311
312 *rchip = NULL;
313
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700314 switch (snd_usb_get_speed(dev)) {
315 case USB_SPEED_LOW:
316 case USB_SPEED_FULL:
317 case USB_SPEED_HIGH:
318 case USB_SPEED_SUPER:
319 break;
320 default:
Daniel Macke5779992010-03-04 19:46:13 +0100321 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
322 return -ENXIO;
323 }
324
325 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
326 if (err < 0) {
327 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
328 return err;
329 }
330
331 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
332 if (! chip) {
333 snd_card_free(card);
334 return -ENOMEM;
335 }
336
Takashi Iwai382225e2011-02-22 10:21:18 +0100337 mutex_init(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100338 chip->index = idx;
339 chip->dev = dev;
340 chip->card = card;
341 chip->setup = device_setup[idx];
342 chip->nrpacks = nrpacks;
343 chip->async_unlink = async_unlink;
Oliver Neukum88a85162011-03-11 14:51:12 +0100344 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100345
346 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
347 le16_to_cpu(dev->descriptor.idProduct));
348 INIT_LIST_HEAD(&chip->pcm_list);
349 INIT_LIST_HEAD(&chip->midi_list);
350 INIT_LIST_HEAD(&chip->mixer_list);
351
352 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
353 snd_usb_audio_free(chip);
354 snd_card_free(card);
355 return err;
356 }
357
358 strcpy(card->driver, "USB-Audio");
359 sprintf(component, "USB%04x:%04x",
360 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
361 snd_component_add(card, component);
362
363 /* retrieve the device string as shortname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100364 if (quirk && quirk->product_name && *quirk->product_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100365 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
366 } else {
367 if (!dev->descriptor.iProduct ||
368 usb_string(dev, dev->descriptor.iProduct,
369 card->shortname, sizeof(card->shortname)) <= 0) {
370 /* no name available from anywhere, so use ID */
371 sprintf(card->shortname, "USB Device %#04x:%#04x",
372 USB_ID_VENDOR(chip->usb_id),
373 USB_ID_PRODUCT(chip->usb_id));
374 }
375 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100376 remove_trailing_spaces(card->shortname);
Daniel Macke5779992010-03-04 19:46:13 +0100377
378 /* retrieve the vendor and device strings as longname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100379 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100380 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
381 } else {
382 if (dev->descriptor.iManufacturer)
383 len = usb_string(dev, dev->descriptor.iManufacturer,
384 card->longname, sizeof(card->longname));
385 else
386 len = 0;
387 /* we don't really care if there isn't any vendor string */
388 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100389 if (len > 0) {
390 remove_trailing_spaces(card->longname);
391 if (*card->longname)
392 strlcat(card->longname, " ", sizeof(card->longname));
393 }
Daniel Macke5779992010-03-04 19:46:13 +0100394
395 strlcat(card->longname, card->shortname, sizeof(card->longname));
396
397 len = strlcat(card->longname, " at ", sizeof(card->longname));
398
399 if (len < sizeof(card->longname))
400 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
401
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700402 switch (snd_usb_get_speed(dev)) {
403 case USB_SPEED_LOW:
404 strlcat(card->longname, ", low speed", sizeof(card->longname));
405 break;
406 case USB_SPEED_FULL:
407 strlcat(card->longname, ", full speed", sizeof(card->longname));
408 break;
409 case USB_SPEED_HIGH:
410 strlcat(card->longname, ", high speed", sizeof(card->longname));
411 break;
412 case USB_SPEED_SUPER:
413 strlcat(card->longname, ", super speed", sizeof(card->longname));
414 break;
415 default:
416 break;
417 }
Daniel Macke5779992010-03-04 19:46:13 +0100418
419 snd_usb_audio_create_proc(chip);
420
421 *rchip = chip;
422 return 0;
423}
424
425/*
426 * probe the active usb device
427 *
428 * note that this can be called multiple times per a device, when it
429 * includes multiple audio control interfaces.
430 *
431 * thus we check the usb device pointer and creates the card instance
432 * only at the first time. the successive calls of this function will
433 * append the pcm interface to the corresponding card.
434 */
435static void *snd_usb_audio_probe(struct usb_device *dev,
436 struct usb_interface *intf,
437 const struct usb_device_id *usb_id)
438{
439 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
440 int i, err;
441 struct snd_usb_audio *chip;
442 struct usb_host_interface *alts;
443 int ifnum;
444 u32 id;
445
446 alts = &intf->altsetting[0];
447 ifnum = get_iface_desc(alts)->bInterfaceNumber;
448 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
449 le16_to_cpu(dev->descriptor.idProduct));
450 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
451 goto __err_val;
452
453 if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
454 goto __err_val;
455
456 /*
457 * found a config. now register to ALSA
458 */
459
460 /* check whether it's already registered */
461 chip = NULL;
462 mutex_lock(&register_mutex);
463 for (i = 0; i < SNDRV_CARDS; i++) {
464 if (usb_chip[i] && usb_chip[i]->dev == dev) {
465 if (usb_chip[i]->shutdown) {
466 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
467 goto __error;
468 }
469 chip = usb_chip[i];
Oliver Neukum88a85162011-03-11 14:51:12 +0100470 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100471 break;
472 }
473 }
474 if (! chip) {
475 /* it's a fresh one.
476 * now look for an empty slot and create a new card instance
477 */
478 for (i = 0; i < SNDRV_CARDS; i++)
479 if (enable[i] && ! usb_chip[i] &&
480 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
481 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
482 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
483 goto __error;
484 }
485 snd_card_set_dev(chip->card, &intf->dev);
Oliver Neukum88a85162011-03-11 14:51:12 +0100486 chip->pm_intf = intf;
Daniel Macke5779992010-03-04 19:46:13 +0100487 break;
488 }
489 if (!chip) {
490 printk(KERN_ERR "no available usb audio device\n");
491 goto __error;
492 }
493 }
494
495 chip->txfr_quirk = 0;
496 err = 1; /* continue */
497 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
498 /* need some special handlings */
499 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
500 goto __error;
501 }
502
Daniel Mack7b6717e2010-09-02 17:13:15 +0800503 /*
504 * For devices with more than one control interface, we assume the
505 * first contains the audio controls. We might need a more specific
506 * check here in the future.
507 */
508 if (!chip->ctrl_intf)
509 chip->ctrl_intf = alts;
Daniel Mack79f920f2010-05-31 14:51:31 +0200510
Daniel Macke5779992010-03-04 19:46:13 +0100511 if (err > 0) {
512 /* create normal USB audio interfaces */
513 if (snd_usb_create_streams(chip, ifnum) < 0 ||
514 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
515 goto __error;
516 }
517 }
518
519 /* we are allowed to call snd_card_register() many times */
520 if (snd_card_register(chip->card) < 0) {
521 goto __error;
522 }
523
524 usb_chip[chip->index] = chip;
525 chip->num_interfaces++;
Oliver Neukum88a85162011-03-11 14:51:12 +0100526 chip->probing = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100527 mutex_unlock(&register_mutex);
528 return chip;
529
530 __error:
531 if (chip && !chip->num_interfaces)
532 snd_card_free(chip->card);
533 mutex_unlock(&register_mutex);
534 __err_val:
535 return NULL;
536}
537
538/*
539 * we need to take care of counter, since disconnection can be called also
540 * many times as well as usb_audio_probe().
541 */
542static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
543{
544 struct snd_usb_audio *chip;
545 struct snd_card *card;
546 struct list_head *p;
547
548 if (ptr == (void *)-1L)
549 return;
550
551 chip = ptr;
552 card = chip->card;
553 mutex_lock(&register_mutex);
Takashi Iwai382225e2011-02-22 10:21:18 +0100554 mutex_lock(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100555 chip->shutdown = 1;
556 chip->num_interfaces--;
557 if (chip->num_interfaces <= 0) {
558 snd_card_disconnect(card);
559 /* release the pcm resources */
560 list_for_each(p, &chip->pcm_list) {
561 snd_usb_stream_disconnect(p);
562 }
563 /* release the midi resources */
564 list_for_each(p, &chip->midi_list) {
565 snd_usbmidi_disconnect(p);
566 }
567 /* release mixer resources */
568 list_for_each(p, &chip->mixer_list) {
569 snd_usb_mixer_disconnect(p);
570 }
571 usb_chip[chip->index] = NULL;
Takashi Iwai382225e2011-02-22 10:21:18 +0100572 mutex_unlock(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100573 mutex_unlock(&register_mutex);
574 snd_card_free_when_closed(card);
575 } else {
Takashi Iwai382225e2011-02-22 10:21:18 +0100576 mutex_unlock(&chip->shutdown_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100577 mutex_unlock(&register_mutex);
578 }
579}
580
581/*
582 * new 2.5 USB kernel API
583 */
584static int usb_audio_probe(struct usb_interface *intf,
585 const struct usb_device_id *id)
586{
587 void *chip;
588 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
589 if (chip) {
590 usb_set_intfdata(intf, chip);
591 return 0;
592 } else
593 return -EIO;
594}
595
596static void usb_audio_disconnect(struct usb_interface *intf)
597{
598 snd_usb_audio_disconnect(interface_to_usbdev(intf),
599 usb_get_intfdata(intf));
600}
601
602#ifdef CONFIG_PM
Oliver Neukum88a85162011-03-11 14:51:12 +0100603
604int snd_usb_autoresume(struct snd_usb_audio *chip)
605{
606 int err = -ENODEV;
607
608 if (!chip->shutdown && !chip->probing)
609 err = usb_autopm_get_interface(chip->pm_intf);
610
611 return err;
612}
613
614void snd_usb_autosuspend(struct snd_usb_audio *chip)
615{
616 if (!chip->shutdown && !chip->probing)
617 usb_autopm_put_interface(chip->pm_intf);
618}
619
Daniel Macke5779992010-03-04 19:46:13 +0100620static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
621{
622 struct snd_usb_audio *chip = usb_get_intfdata(intf);
623 struct list_head *p;
624 struct snd_usb_stream *as;
Oliver Neukumedf7de32011-03-11 13:19:43 +0100625 struct usb_mixer_interface *mixer;
Daniel Macke5779992010-03-04 19:46:13 +0100626
627 if (chip == (void *)-1L)
628 return 0;
629
Oliver Neukum88a85162011-03-11 14:51:12 +0100630 if (!(message.event & PM_EVENT_AUTO)) {
631 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
632 if (!chip->num_suspended_intf++) {
633 list_for_each(p, &chip->pcm_list) {
634 as = list_entry(p, struct snd_usb_stream, list);
635 snd_pcm_suspend_all(as->pcm);
636 }
637 }
638 } else {
639 /*
640 * otherwise we keep the rest of the system in the dark
641 * to keep this transparent
642 */
643 if (!chip->num_suspended_intf++)
644 chip->autosuspended = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100645 }
646
Oliver Neukum88a85162011-03-11 14:51:12 +0100647 list_for_each_entry(mixer, &chip->mixer_list, list)
648 snd_usb_mixer_inactivate(mixer);
649
Daniel Macke5779992010-03-04 19:46:13 +0100650 return 0;
651}
652
653static int usb_audio_resume(struct usb_interface *intf)
654{
655 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Oliver Neukumedf7de32011-03-11 13:19:43 +0100656 struct usb_mixer_interface *mixer;
Oliver Neukum88a85162011-03-11 14:51:12 +0100657 int err = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100658
659 if (chip == (void *)-1L)
660 return 0;
661 if (--chip->num_suspended_intf)
662 return 0;
663 /*
664 * ALSA leaves material resumption to user space
Oliver Neukumedf7de32011-03-11 13:19:43 +0100665 * we just notify and restart the mixers
Daniel Macke5779992010-03-04 19:46:13 +0100666 */
Oliver Neukum88a85162011-03-11 14:51:12 +0100667 list_for_each_entry(mixer, &chip->mixer_list, list) {
668 err = snd_usb_mixer_activate(mixer);
669 if (err < 0)
670 goto err_out;
671 }
Daniel Macke5779992010-03-04 19:46:13 +0100672
Oliver Neukum88a85162011-03-11 14:51:12 +0100673 if (!chip->autosuspended)
674 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
675 chip->autosuspended = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100676
Oliver Neukum88a85162011-03-11 14:51:12 +0100677err_out:
678 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100679}
Randy Dunlap6407d472010-03-22 08:55:35 -0700680#else
681#define usb_audio_suspend NULL
682#define usb_audio_resume NULL
Daniel Macke5779992010-03-04 19:46:13 +0100683#endif /* CONFIG_PM */
684
685static struct usb_device_id usb_audio_ids [] = {
686#include "quirks-table.h"
687 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
688 .bInterfaceClass = USB_CLASS_AUDIO,
689 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
690 { } /* Terminating entry */
691};
692
693MODULE_DEVICE_TABLE (usb, usb_audio_ids);
694
695/*
696 * entry point for linux usb interface
697 */
698
699static struct usb_driver usb_audio_driver = {
700 .name = "snd-usb-audio",
701 .probe = usb_audio_probe,
702 .disconnect = usb_audio_disconnect,
703 .suspend = usb_audio_suspend,
704 .resume = usb_audio_resume,
705 .id_table = usb_audio_ids,
Oliver Neukum88a85162011-03-11 14:51:12 +0100706 .supports_autosuspend = 1,
Daniel Macke5779992010-03-04 19:46:13 +0100707};
708
709static int __init snd_usb_audio_init(void)
710{
711 if (nrpacks < 1 || nrpacks > MAX_PACKS) {
712 printk(KERN_WARNING "invalid nrpacks value.\n");
713 return -EINVAL;
714 }
715 return usb_register(&usb_audio_driver);
716}
717
718static void __exit snd_usb_audio_cleanup(void)
719{
720 usb_deregister(&usb_audio_driver);
721}
722
723module_init(snd_usb_audio_init);
724module_exit(snd_usb_audio_cleanup);