blob: 803953a9bff338056795c888cecc9d7fb9c6daa2 [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 *
Daniel Macke5779992010-03-04 19:46:13 +010028 * - the linked URBs would be preferred but not used so far because of
29 * the instability of unlinking.
30 * - type II is not supported properly. there is no device which supports
31 * this type *correctly*. SB extigy looks as if it supports, but it's
32 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
33 */
34
35
36#include <linux/bitops.h>
37#include <linux/init.h>
38#include <linux/list.h>
39#include <linux/slab.h>
40#include <linux/string.h>
Takashi Iwai3ffc1222011-03-21 12:00:00 +010041#include <linux/ctype.h>
Daniel Macke5779992010-03-04 19:46:13 +010042#include <linux/usb.h>
43#include <linux/moduleparam.h>
44#include <linux/mutex.h>
45#include <linux/usb/audio.h>
Daniel Mack7e847892010-03-11 21:13:20 +010046#include <linux/usb/audio-v2.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040047#include <linux/module.h>
Daniel Macke5779992010-03-04 19:46:13 +010048
Daniel Mack9e386582011-05-25 09:09:01 +020049#include <sound/control.h>
Daniel Macke5779992010-03-04 19:46:13 +010050#include <sound/core.h>
51#include <sound/info.h>
52#include <sound/pcm.h>
53#include <sound/pcm_params.h>
54#include <sound/initval.h>
55
56#include "usbaudio.h"
57#include "card.h"
58#include "midi.h"
Daniel Mackf0b5e632010-03-11 21:13:23 +010059#include "mixer.h"
Daniel Macke5779992010-03-04 19:46:13 +010060#include "proc.h"
61#include "quirks.h"
62#include "endpoint.h"
63#include "helper.h"
64#include "debug.h"
65#include "pcm.h"
Daniel Macke5779992010-03-04 19:46:13 +010066#include "format.h"
Oliver Neukum88a85162011-03-11 14:51:12 +010067#include "power.h"
Daniel Macke8e8bab2011-09-12 18:54:12 +020068#include "stream.h"
Daniel Macke5779992010-03-04 19:46:13 +010069
70MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
71MODULE_DESCRIPTION("USB Audio");
72MODULE_LICENSE("GPL");
73MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
74
75
76static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
77static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
Rusty Russella67ff6a2011-12-15 13:49:36 +103078static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
Daniel Macke5779992010-03-04 19:46:13 +010079/* Vendor/product IDs for this card */
80static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
81static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
82static int nrpacks = 8; /* max. number of packets per urb */
Daniel Macke5779992010-03-04 19:46:13 +010083static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
Rusty Russella67ff6a2011-12-15 13:49:36 +103084static bool ignore_ctl_error;
Daniel Macke5779992010-03-04 19:46:13 +010085
86module_param_array(index, int, NULL, 0444);
87MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
88module_param_array(id, charp, NULL, 0444);
89MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
90module_param_array(enable, bool, NULL, 0444);
91MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
92module_param_array(vid, int, NULL, 0444);
93MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
94module_param_array(pid, int, NULL, 0444);
95MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
96module_param(nrpacks, int, 0644);
97MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
Daniel Macke5779992010-03-04 19:46:13 +010098module_param_array(device_setup, int, NULL, 0444);
99MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
100module_param(ignore_ctl_error, bool, 0444);
101MODULE_PARM_DESC(ignore_ctl_error,
102 "Ignore errors from USB controller for mixer interfaces.");
103
104/*
105 * we keep the snd_usb_audio_t instances by ourselves for merging
106 * the all interfaces on the same card as one sound device.
107 */
108
109static DEFINE_MUTEX(register_mutex);
110static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
111static struct usb_driver usb_audio_driver;
112
113/*
114 * disconnect streams
115 * called from snd_usb_audio_disconnect()
116 */
117static void snd_usb_stream_disconnect(struct list_head *head)
118{
119 int idx;
120 struct snd_usb_stream *as;
121 struct snd_usb_substream *subs;
122
123 as = list_entry(head, struct snd_usb_stream, list);
124 for (idx = 0; idx < 2; idx++) {
125 subs = &as->substream[idx];
126 if (!subs->num_formats)
Takashi Iwai76195fb2010-09-08 08:27:02 +0200127 continue;
Daniel Macke5779992010-03-04 19:46:13 +0100128 subs->interface = -1;
Daniel Mackedcd3632012-04-12 13:51:12 +0200129 subs->data_endpoint = NULL;
130 subs->sync_endpoint = NULL;
Daniel Macke5779992010-03-04 19:46:13 +0100131 }
132}
133
134static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
135{
136 struct usb_device *dev = chip->dev;
137 struct usb_host_interface *alts;
138 struct usb_interface_descriptor *altsd;
139 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
140
141 if (!iface) {
142 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
143 dev->devnum, ctrlif, interface);
144 return -EINVAL;
145 }
146
147 if (usb_interface_claimed(iface)) {
148 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
149 dev->devnum, ctrlif, interface);
150 return -EINVAL;
151 }
152
153 alts = &iface->altsetting[0];
154 altsd = get_iface_desc(alts);
155 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
156 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
157 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
158 int err = snd_usbmidi_create(chip->card, iface,
159 &chip->midi_list, NULL);
160 if (err < 0) {
161 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
162 dev->devnum, ctrlif, interface);
163 return -EINVAL;
164 }
165 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
166
167 return 0;
168 }
169
170 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
171 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
172 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
173 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
174 dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
175 /* skip non-supported classes */
176 return -EINVAL;
177 }
178
179 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
180 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
181 return -EINVAL;
182 }
183
Daniel Macke8e8bab2011-09-12 18:54:12 +0200184 if (! snd_usb_parse_audio_interface(chip, interface)) {
Daniel Macke5779992010-03-04 19:46:13 +0100185 usb_set_interface(dev, interface, 0); /* reset the current interface */
186 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
187 return -EINVAL;
188 }
189
190 return 0;
191}
192
193/*
194 * parse audio control descriptor and create pcm/midi streams
195 */
196static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
197{
198 struct usb_device *dev = chip->dev;
199 struct usb_host_interface *host_iface;
200 struct usb_interface_descriptor *altsd;
201 void *control_header;
202 int i, protocol;
203
204 /* find audiocontrol interface */
205 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
206 control_header = snd_usb_find_csint_desc(host_iface->extra,
207 host_iface->extralen,
208 NULL, UAC_HEADER);
209 altsd = get_iface_desc(host_iface);
210 protocol = altsd->bInterfaceProtocol;
211
212 if (!control_header) {
213 snd_printk(KERN_ERR "cannot find UAC_HEADER\n");
214 return -EINVAL;
215 }
216
217 switch (protocol) {
Clemens Ladischa2acad82010-09-03 10:53:11 +0200218 default:
219 snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n",
220 protocol);
221 /* fall through */
222
Daniel Macke5779992010-03-04 19:46:13 +0100223 case UAC_VERSION_1: {
Daniel Mack69da9bc2010-06-16 17:57:28 +0200224 struct uac1_ac_header_descriptor *h1 = control_header;
Daniel Macke5779992010-03-04 19:46:13 +0100225
226 if (!h1->bInCollection) {
227 snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
228 return -EINVAL;
229 }
230
231 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
232 snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n");
233 return -EINVAL;
234 }
235
236 for (i = 0; i < h1->bInCollection; i++)
237 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
238
239 break;
240 }
241
242 case UAC_VERSION_2: {
Daniel Macke5779992010-03-04 19:46:13 +0100243 struct usb_interface_assoc_descriptor *assoc =
244 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
245
246 if (!assoc) {
247 snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
248 return -EINVAL;
249 }
250
Daniel Macke5779992010-03-04 19:46:13 +0100251 for (i = 0; i < assoc->bInterfaceCount; i++) {
252 int intf = assoc->bFirstInterface + i;
253
254 if (intf != ctrlif)
255 snd_usb_create_stream(chip, ctrlif, intf);
256 }
257
258 break;
259 }
Daniel Macke5779992010-03-04 19:46:13 +0100260 }
261
262 return 0;
263}
264
265/*
266 * free the chip instance
267 *
268 * here we have to do not much, since pcm and controls are already freed
269 *
270 */
271
272static int snd_usb_audio_free(struct snd_usb_audio *chip)
273{
Daniel Mack596580d2012-04-12 13:51:10 +0200274 mutex_destroy(&chip->mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100275 kfree(chip);
276 return 0;
277}
278
279static int snd_usb_audio_dev_free(struct snd_device *device)
280{
281 struct snd_usb_audio *chip = device->device_data;
282 return snd_usb_audio_free(chip);
283}
284
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100285static void remove_trailing_spaces(char *str)
286{
287 char *p;
288
289 if (!*str)
290 return;
291 for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
292 *p = 0;
293}
Daniel Macke5779992010-03-04 19:46:13 +0100294
295/*
296 * create a chip instance and set its names.
297 */
298static int snd_usb_audio_create(struct usb_device *dev, int idx,
299 const struct snd_usb_audio_quirk *quirk,
300 struct snd_usb_audio **rchip)
301{
302 struct snd_card *card;
303 struct snd_usb_audio *chip;
304 int err, len;
305 char component[14];
306 static struct snd_device_ops ops = {
307 .dev_free = snd_usb_audio_dev_free,
308 };
309
310 *rchip = NULL;
311
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700312 switch (snd_usb_get_speed(dev)) {
313 case USB_SPEED_LOW:
314 case USB_SPEED_FULL:
315 case USB_SPEED_HIGH:
316 case USB_SPEED_SUPER:
317 break;
318 default:
Daniel Macke5779992010-03-04 19:46:13 +0100319 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
320 return -ENXIO;
321 }
322
323 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
324 if (err < 0) {
325 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
326 return err;
327 }
328
329 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
330 if (! chip) {
331 snd_card_free(card);
332 return -ENOMEM;
333 }
334
Daniel Mack596580d2012-04-12 13:51:10 +0200335 mutex_init(&chip->mutex);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200336 init_rwsem(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100337 chip->index = idx;
338 chip->dev = dev;
339 chip->card = card;
340 chip->setup = device_setup[idx];
341 chip->nrpacks = nrpacks;
Oliver Neukum88a85162011-03-11 14:51:12 +0100342 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100343
344 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
345 le16_to_cpu(dev->descriptor.idProduct));
346 INIT_LIST_HEAD(&chip->pcm_list);
Daniel Mackedcd3632012-04-12 13:51:12 +0200347 INIT_LIST_HEAD(&chip->ep_list);
Daniel Macke5779992010-03-04 19:46:13 +0100348 INIT_LIST_HEAD(&chip->midi_list);
349 INIT_LIST_HEAD(&chip->mixer_list);
350
351 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
352 snd_usb_audio_free(chip);
353 snd_card_free(card);
354 return err;
355 }
356
357 strcpy(card->driver, "USB-Audio");
358 sprintf(component, "USB%04x:%04x",
359 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
360 snd_component_add(card, component);
361
362 /* retrieve the device string as shortname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100363 if (quirk && quirk->product_name && *quirk->product_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100364 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
365 } else {
366 if (!dev->descriptor.iProduct ||
367 usb_string(dev, dev->descriptor.iProduct,
368 card->shortname, sizeof(card->shortname)) <= 0) {
369 /* no name available from anywhere, so use ID */
370 sprintf(card->shortname, "USB Device %#04x:%#04x",
371 USB_ID_VENDOR(chip->usb_id),
372 USB_ID_PRODUCT(chip->usb_id));
373 }
374 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100375 remove_trailing_spaces(card->shortname);
Daniel Macke5779992010-03-04 19:46:13 +0100376
377 /* retrieve the vendor and device strings as longname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100378 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100379 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
380 } else {
381 if (dev->descriptor.iManufacturer)
382 len = usb_string(dev, dev->descriptor.iManufacturer,
383 card->longname, sizeof(card->longname));
384 else
385 len = 0;
386 /* we don't really care if there isn't any vendor string */
387 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100388 if (len > 0) {
389 remove_trailing_spaces(card->longname);
390 if (*card->longname)
391 strlcat(card->longname, " ", sizeof(card->longname));
392 }
Daniel Macke5779992010-03-04 19:46:13 +0100393
394 strlcat(card->longname, card->shortname, sizeof(card->longname));
395
396 len = strlcat(card->longname, " at ", sizeof(card->longname));
397
398 if (len < sizeof(card->longname))
399 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
400
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700401 switch (snd_usb_get_speed(dev)) {
402 case USB_SPEED_LOW:
403 strlcat(card->longname, ", low speed", sizeof(card->longname));
404 break;
405 case USB_SPEED_FULL:
406 strlcat(card->longname, ", full speed", sizeof(card->longname));
407 break;
408 case USB_SPEED_HIGH:
409 strlcat(card->longname, ", high speed", sizeof(card->longname));
410 break;
411 case USB_SPEED_SUPER:
412 strlcat(card->longname, ", super speed", sizeof(card->longname));
413 break;
414 default:
415 break;
416 }
Daniel Macke5779992010-03-04 19:46:13 +0100417
418 snd_usb_audio_create_proc(chip);
419
420 *rchip = chip;
421 return 0;
422}
423
424/*
425 * probe the active usb device
426 *
427 * note that this can be called multiple times per a device, when it
428 * includes multiple audio control interfaces.
429 *
430 * thus we check the usb device pointer and creates the card instance
431 * only at the first time. the successive calls of this function will
432 * append the pcm interface to the corresponding card.
433 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400434static struct snd_usb_audio *
435snd_usb_audio_probe(struct usb_device *dev,
436 struct usb_interface *intf,
437 const struct usb_device_id *usb_id)
Daniel Macke5779992010-03-04 19:46:13 +0100438{
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
Daniel Mack7b6717e2010-09-02 17:13:15 +0800495 /*
496 * For devices with more than one control interface, we assume the
497 * first contains the audio controls. We might need a more specific
498 * check here in the future.
499 */
500 if (!chip->ctrl_intf)
501 chip->ctrl_intf = alts;
Daniel Mack79f920f2010-05-31 14:51:31 +0200502
Daniel Mack5875c2c2011-05-25 09:08:59 +0200503 chip->txfr_quirk = 0;
504 err = 1; /* continue */
505 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
506 /* need some special handlings */
507 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
508 goto __error;
509 }
510
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:
Thomas Pfaff61a6a102011-09-26 15:43:59 +0200531 if (chip) {
532 if (!chip->num_interfaces)
533 snd_card_free(chip->card);
534 chip->probing = 0;
535 }
Daniel Macke5779992010-03-04 19:46:13 +0100536 mutex_unlock(&register_mutex);
537 __err_val:
538 return NULL;
539}
540
541/*
542 * we need to take care of counter, since disconnection can be called also
543 * many times as well as usb_audio_probe().
544 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400545static void snd_usb_audio_disconnect(struct usb_device *dev,
546 struct snd_usb_audio *chip)
Daniel Macke5779992010-03-04 19:46:13 +0100547{
Daniel Macke5779992010-03-04 19:46:13 +0100548 struct snd_card *card;
Pavel Roskin03d2f442012-08-30 17:11:17 -0400549 struct list_head *p, *n;
Daniel Macke5779992010-03-04 19:46:13 +0100550
Pavel Roskin81b85b62011-07-06 11:20:13 -0400551 if (chip == (void *)-1L)
Daniel Macke5779992010-03-04 19:46:13 +0100552 return;
553
Daniel Macke5779992010-03-04 19:46:13 +0100554 card = chip->card;
Takashi Iwai34f3c892012-10-15 12:16:02 +0200555 down_write(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100556 chip->shutdown = 1;
Takashi Iwai10e44232012-11-13 11:22:48 +0100557 up_write(&chip->shutdown_rwsem);
558
559 mutex_lock(&register_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100560 chip->num_interfaces--;
561 if (chip->num_interfaces <= 0) {
562 snd_card_disconnect(card);
563 /* release the pcm resources */
564 list_for_each(p, &chip->pcm_list) {
565 snd_usb_stream_disconnect(p);
566 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200567 /* release the endpoint resources */
Pavel Roskin03d2f442012-08-30 17:11:17 -0400568 list_for_each_safe(p, n, &chip->ep_list) {
Daniel Mackedcd3632012-04-12 13:51:12 +0200569 snd_usb_endpoint_free(p);
570 }
Daniel Macke5779992010-03-04 19:46:13 +0100571 /* release the midi resources */
572 list_for_each(p, &chip->midi_list) {
573 snd_usbmidi_disconnect(p);
574 }
575 /* release mixer resources */
576 list_for_each(p, &chip->mixer_list) {
577 snd_usb_mixer_disconnect(p);
578 }
579 usb_chip[chip->index] = NULL;
580 mutex_unlock(&register_mutex);
581 snd_card_free_when_closed(card);
582 } else {
583 mutex_unlock(&register_mutex);
584 }
585}
586
587/*
588 * new 2.5 USB kernel API
589 */
590static int usb_audio_probe(struct usb_interface *intf,
591 const struct usb_device_id *id)
592{
Pavel Roskin81b85b62011-07-06 11:20:13 -0400593 struct snd_usb_audio *chip;
Daniel Macke5779992010-03-04 19:46:13 +0100594 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
595 if (chip) {
596 usb_set_intfdata(intf, chip);
597 return 0;
598 } else
599 return -EIO;
600}
601
602static void usb_audio_disconnect(struct usb_interface *intf)
603{
604 snd_usb_audio_disconnect(interface_to_usbdev(intf),
605 usb_get_intfdata(intf));
606}
607
608#ifdef CONFIG_PM
Oliver Neukum88a85162011-03-11 14:51:12 +0100609
610int snd_usb_autoresume(struct snd_usb_audio *chip)
611{
612 int err = -ENODEV;
613
Takashi Iwai34f3c892012-10-15 12:16:02 +0200614 down_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100615 if (!chip->shutdown && !chip->probing)
616 err = usb_autopm_get_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200617 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100618
619 return err;
620}
621
622void snd_usb_autosuspend(struct snd_usb_audio *chip)
623{
Takashi Iwai34f3c892012-10-15 12:16:02 +0200624 down_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100625 if (!chip->shutdown && !chip->probing)
626 usb_autopm_put_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200627 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100628}
629
Daniel Macke5779992010-03-04 19:46:13 +0100630static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
631{
632 struct snd_usb_audio *chip = usb_get_intfdata(intf);
633 struct list_head *p;
634 struct snd_usb_stream *as;
Oliver Neukumedf7de32011-03-11 13:19:43 +0100635 struct usb_mixer_interface *mixer;
Daniel Macke5779992010-03-04 19:46:13 +0100636
637 if (chip == (void *)-1L)
638 return 0;
639
Alan Stern5b1b0b82011-08-19 23:49:48 +0200640 if (!PMSG_IS_AUTO(message)) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100641 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
642 if (!chip->num_suspended_intf++) {
643 list_for_each(p, &chip->pcm_list) {
644 as = list_entry(p, struct snd_usb_stream, list);
645 snd_pcm_suspend_all(as->pcm);
Takashi Iwai384dc0852012-09-18 14:49:31 +0200646 as->substream[0].need_setup_ep =
647 as->substream[1].need_setup_ep = true;
Oliver Neukum88a85162011-03-11 14:51:12 +0100648 }
Antonio Ospiteaa53f982013-01-29 12:56:30 +0100649 }
Oliver Neukum88a85162011-03-11 14:51:12 +0100650 } else {
651 /*
652 * otherwise we keep the rest of the system in the dark
653 * to keep this transparent
654 */
655 if (!chip->num_suspended_intf++)
656 chip->autosuspended = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100657 }
658
Oliver Neukum88a85162011-03-11 14:51:12 +0100659 list_for_each_entry(mixer, &chip->mixer_list, list)
660 snd_usb_mixer_inactivate(mixer);
661
Daniel Macke5779992010-03-04 19:46:13 +0100662 return 0;
663}
664
665static int usb_audio_resume(struct usb_interface *intf)
666{
667 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Oliver Neukumedf7de32011-03-11 13:19:43 +0100668 struct usb_mixer_interface *mixer;
Oliver Neukum88a85162011-03-11 14:51:12 +0100669 int err = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100670
671 if (chip == (void *)-1L)
672 return 0;
673 if (--chip->num_suspended_intf)
674 return 0;
675 /*
676 * ALSA leaves material resumption to user space
Oliver Neukumedf7de32011-03-11 13:19:43 +0100677 * we just notify and restart the mixers
Daniel Macke5779992010-03-04 19:46:13 +0100678 */
Oliver Neukum88a85162011-03-11 14:51:12 +0100679 list_for_each_entry(mixer, &chip->mixer_list, list) {
680 err = snd_usb_mixer_activate(mixer);
681 if (err < 0)
682 goto err_out;
683 }
Daniel Macke5779992010-03-04 19:46:13 +0100684
Oliver Neukum88a85162011-03-11 14:51:12 +0100685 if (!chip->autosuspended)
686 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
687 chip->autosuspended = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100688
Oliver Neukum88a85162011-03-11 14:51:12 +0100689err_out:
690 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100691}
Randy Dunlap6407d472010-03-22 08:55:35 -0700692#else
693#define usb_audio_suspend NULL
694#define usb_audio_resume NULL
Daniel Macke5779992010-03-04 19:46:13 +0100695#endif /* CONFIG_PM */
696
697static struct usb_device_id usb_audio_ids [] = {
698#include "quirks-table.h"
699 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
700 .bInterfaceClass = USB_CLASS_AUDIO,
701 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
702 { } /* Terminating entry */
703};
704
705MODULE_DEVICE_TABLE (usb, usb_audio_ids);
706
707/*
708 * entry point for linux usb interface
709 */
710
711static struct usb_driver usb_audio_driver = {
712 .name = "snd-usb-audio",
713 .probe = usb_audio_probe,
714 .disconnect = usb_audio_disconnect,
715 .suspend = usb_audio_suspend,
716 .resume = usb_audio_resume,
717 .id_table = usb_audio_ids,
Oliver Neukum88a85162011-03-11 14:51:12 +0100718 .supports_autosuspend = 1,
Daniel Macke5779992010-03-04 19:46:13 +0100719};
720
721static int __init snd_usb_audio_init(void)
722{
723 if (nrpacks < 1 || nrpacks > MAX_PACKS) {
724 printk(KERN_WARNING "invalid nrpacks value.\n");
725 return -EINVAL;
726 }
727 return usb_register(&usb_audio_driver);
728}
729
730static void __exit snd_usb_audio_cleanup(void)
731{
732 usb_deregister(&usb_audio_driver);
733}
734
735module_init(snd_usb_audio_init);
736module_exit(snd_usb_audio_cleanup);