blob: d979050e6a6afbc7daf9b65f666c2de10dbb6269 [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 };
Daniel Macke5779992010-03-04 19:46:13 +010082static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
Rusty Russella67ff6a2011-12-15 13:49:36 +103083static bool ignore_ctl_error;
Eldad Zackef02e292013-04-03 23:18:56 +020084static bool autoclock = true;
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.");
Daniel Macke5779992010-03-04 19:46:13 +010096module_param_array(device_setup, int, NULL, 0444);
97MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
98module_param(ignore_ctl_error, bool, 0444);
99MODULE_PARM_DESC(ignore_ctl_error,
100 "Ignore errors from USB controller for mixer interfaces.");
Eldad Zackef02e292013-04-03 23:18:56 +0200101module_param(autoclock, bool, 0444);
102MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
Daniel Macke5779992010-03-04 19:46:13 +0100103
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
Clemens Ladisch342cda292013-06-15 11:21:09 +0200147 alts = &iface->altsetting[0];
148 altsd = get_iface_desc(alts);
149
150 /*
151 * Android with both accessory and audio interfaces enabled gets the
152 * interface numbers wrong.
153 */
154 if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
155 chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
156 interface == 0 &&
157 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
158 altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
159 interface = 2;
160 iface = usb_ifnum_to_if(dev, interface);
161 if (!iface)
162 return -EINVAL;
163 alts = &iface->altsetting[0];
164 altsd = get_iface_desc(alts);
165 }
166
Daniel Macke5779992010-03-04 19:46:13 +0100167 if (usb_interface_claimed(iface)) {
168 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
169 dev->devnum, ctrlif, interface);
170 return -EINVAL;
171 }
172
Daniel Macke5779992010-03-04 19:46:13 +0100173 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
174 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
175 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
176 int err = snd_usbmidi_create(chip->card, iface,
177 &chip->midi_list, NULL);
178 if (err < 0) {
179 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
180 dev->devnum, ctrlif, interface);
181 return -EINVAL;
182 }
183 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
184
185 return 0;
186 }
187
188 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
189 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
190 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
191 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
192 dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
193 /* skip non-supported classes */
194 return -EINVAL;
195 }
196
197 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
198 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
199 return -EINVAL;
200 }
201
Daniel Macke8e8bab2011-09-12 18:54:12 +0200202 if (! snd_usb_parse_audio_interface(chip, interface)) {
Daniel Macke5779992010-03-04 19:46:13 +0100203 usb_set_interface(dev, interface, 0); /* reset the current interface */
204 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
205 return -EINVAL;
206 }
207
208 return 0;
209}
210
211/*
212 * parse audio control descriptor and create pcm/midi streams
213 */
214static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
215{
216 struct usb_device *dev = chip->dev;
217 struct usb_host_interface *host_iface;
218 struct usb_interface_descriptor *altsd;
219 void *control_header;
220 int i, protocol;
221
222 /* find audiocontrol interface */
223 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
224 control_header = snd_usb_find_csint_desc(host_iface->extra,
225 host_iface->extralen,
226 NULL, UAC_HEADER);
227 altsd = get_iface_desc(host_iface);
228 protocol = altsd->bInterfaceProtocol;
229
230 if (!control_header) {
231 snd_printk(KERN_ERR "cannot find UAC_HEADER\n");
232 return -EINVAL;
233 }
234
235 switch (protocol) {
Clemens Ladischa2acad82010-09-03 10:53:11 +0200236 default:
237 snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n",
238 protocol);
239 /* fall through */
240
Daniel Macke5779992010-03-04 19:46:13 +0100241 case UAC_VERSION_1: {
Daniel Mack69da9bc2010-06-16 17:57:28 +0200242 struct uac1_ac_header_descriptor *h1 = control_header;
Daniel Macke5779992010-03-04 19:46:13 +0100243
244 if (!h1->bInCollection) {
245 snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
246 return -EINVAL;
247 }
248
249 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
250 snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n");
251 return -EINVAL;
252 }
253
254 for (i = 0; i < h1->bInCollection; i++)
255 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
256
257 break;
258 }
259
260 case UAC_VERSION_2: {
Daniel Macke5779992010-03-04 19:46:13 +0100261 struct usb_interface_assoc_descriptor *assoc =
262 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
263
264 if (!assoc) {
Clemens Ladisch281a6ac2013-03-11 20:15:34 +0100265 /*
266 * Firmware writers cannot count to three. So to find
267 * the IAD on the NuForce UDH-100, also check the next
268 * interface.
269 */
270 struct usb_interface *iface =
271 usb_ifnum_to_if(dev, ctrlif + 1);
272 if (iface &&
273 iface->intf_assoc &&
274 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
275 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
276 assoc = iface->intf_assoc;
277 }
278
279 if (!assoc) {
Daniel Macke5779992010-03-04 19:46:13 +0100280 snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
281 return -EINVAL;
282 }
283
Daniel Macke5779992010-03-04 19:46:13 +0100284 for (i = 0; i < assoc->bInterfaceCount; i++) {
285 int intf = assoc->bFirstInterface + i;
286
287 if (intf != ctrlif)
288 snd_usb_create_stream(chip, ctrlif, intf);
289 }
290
291 break;
292 }
Daniel Macke5779992010-03-04 19:46:13 +0100293 }
294
295 return 0;
296}
297
298/*
299 * free the chip instance
300 *
301 * here we have to do not much, since pcm and controls are already freed
302 *
303 */
304
305static int snd_usb_audio_free(struct snd_usb_audio *chip)
306{
Daniel Mack596580d2012-04-12 13:51:10 +0200307 mutex_destroy(&chip->mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100308 kfree(chip);
309 return 0;
310}
311
312static int snd_usb_audio_dev_free(struct snd_device *device)
313{
314 struct snd_usb_audio *chip = device->device_data;
315 return snd_usb_audio_free(chip);
316}
317
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100318static void remove_trailing_spaces(char *str)
319{
320 char *p;
321
322 if (!*str)
323 return;
324 for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
325 *p = 0;
326}
Daniel Macke5779992010-03-04 19:46:13 +0100327
328/*
329 * create a chip instance and set its names.
330 */
331static int snd_usb_audio_create(struct usb_device *dev, int idx,
332 const struct snd_usb_audio_quirk *quirk,
333 struct snd_usb_audio **rchip)
334{
335 struct snd_card *card;
336 struct snd_usb_audio *chip;
337 int err, len;
338 char component[14];
339 static struct snd_device_ops ops = {
340 .dev_free = snd_usb_audio_dev_free,
341 };
342
343 *rchip = NULL;
344
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700345 switch (snd_usb_get_speed(dev)) {
346 case USB_SPEED_LOW:
347 case USB_SPEED_FULL:
348 case USB_SPEED_HIGH:
Thomas Pugliesedf3774c2013-10-01 14:32:15 -0500349 case USB_SPEED_WIRELESS:
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700350 case USB_SPEED_SUPER:
351 break;
352 default:
Daniel Macke5779992010-03-04 19:46:13 +0100353 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
354 return -ENXIO;
355 }
356
357 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
358 if (err < 0) {
359 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
360 return err;
361 }
362
363 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
364 if (! chip) {
365 snd_card_free(card);
366 return -ENOMEM;
367 }
368
Daniel Mack596580d2012-04-12 13:51:10 +0200369 mutex_init(&chip->mutex);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200370 init_rwsem(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100371 chip->index = idx;
372 chip->dev = dev;
373 chip->card = card;
374 chip->setup = device_setup[idx];
Eldad Zackef02e292013-04-03 23:18:56 +0200375 chip->autoclock = autoclock;
Oliver Neukum88a85162011-03-11 14:51:12 +0100376 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100377
378 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
379 le16_to_cpu(dev->descriptor.idProduct));
380 INIT_LIST_HEAD(&chip->pcm_list);
Daniel Mackedcd3632012-04-12 13:51:12 +0200381 INIT_LIST_HEAD(&chip->ep_list);
Daniel Macke5779992010-03-04 19:46:13 +0100382 INIT_LIST_HEAD(&chip->midi_list);
383 INIT_LIST_HEAD(&chip->mixer_list);
384
385 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
386 snd_usb_audio_free(chip);
387 snd_card_free(card);
388 return err;
389 }
390
391 strcpy(card->driver, "USB-Audio");
392 sprintf(component, "USB%04x:%04x",
393 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
394 snd_component_add(card, component);
395
396 /* retrieve the device string as shortname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100397 if (quirk && quirk->product_name && *quirk->product_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100398 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
399 } else {
400 if (!dev->descriptor.iProduct ||
401 usb_string(dev, dev->descriptor.iProduct,
402 card->shortname, sizeof(card->shortname)) <= 0) {
403 /* no name available from anywhere, so use ID */
404 sprintf(card->shortname, "USB Device %#04x:%#04x",
405 USB_ID_VENDOR(chip->usb_id),
406 USB_ID_PRODUCT(chip->usb_id));
407 }
408 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100409 remove_trailing_spaces(card->shortname);
Daniel Macke5779992010-03-04 19:46:13 +0100410
411 /* retrieve the vendor and device strings as longname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100412 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100413 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
414 } else {
415 if (dev->descriptor.iManufacturer)
416 len = usb_string(dev, dev->descriptor.iManufacturer,
417 card->longname, sizeof(card->longname));
418 else
419 len = 0;
420 /* we don't really care if there isn't any vendor string */
421 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100422 if (len > 0) {
423 remove_trailing_spaces(card->longname);
424 if (*card->longname)
425 strlcat(card->longname, " ", sizeof(card->longname));
426 }
Daniel Macke5779992010-03-04 19:46:13 +0100427
428 strlcat(card->longname, card->shortname, sizeof(card->longname));
429
430 len = strlcat(card->longname, " at ", sizeof(card->longname));
431
432 if (len < sizeof(card->longname))
433 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
434
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700435 switch (snd_usb_get_speed(dev)) {
436 case USB_SPEED_LOW:
437 strlcat(card->longname, ", low speed", sizeof(card->longname));
438 break;
439 case USB_SPEED_FULL:
440 strlcat(card->longname, ", full speed", sizeof(card->longname));
441 break;
442 case USB_SPEED_HIGH:
443 strlcat(card->longname, ", high speed", sizeof(card->longname));
444 break;
445 case USB_SPEED_SUPER:
446 strlcat(card->longname, ", super speed", sizeof(card->longname));
447 break;
448 default:
449 break;
450 }
Daniel Macke5779992010-03-04 19:46:13 +0100451
452 snd_usb_audio_create_proc(chip);
453
454 *rchip = chip;
455 return 0;
456}
457
458/*
459 * probe the active usb device
460 *
461 * note that this can be called multiple times per a device, when it
462 * includes multiple audio control interfaces.
463 *
464 * thus we check the usb device pointer and creates the card instance
465 * only at the first time. the successive calls of this function will
466 * append the pcm interface to the corresponding card.
467 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400468static struct snd_usb_audio *
469snd_usb_audio_probe(struct usb_device *dev,
470 struct usb_interface *intf,
471 const struct usb_device_id *usb_id)
Daniel Macke5779992010-03-04 19:46:13 +0100472{
473 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
474 int i, err;
475 struct snd_usb_audio *chip;
476 struct usb_host_interface *alts;
477 int ifnum;
478 u32 id;
479
480 alts = &intf->altsetting[0];
481 ifnum = get_iface_desc(alts)->bInterfaceNumber;
482 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
483 le16_to_cpu(dev->descriptor.idProduct));
484 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
485 goto __err_val;
486
487 if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
488 goto __err_val;
489
490 /*
491 * found a config. now register to ALSA
492 */
493
494 /* check whether it's already registered */
495 chip = NULL;
496 mutex_lock(&register_mutex);
497 for (i = 0; i < SNDRV_CARDS; i++) {
498 if (usb_chip[i] && usb_chip[i]->dev == dev) {
499 if (usb_chip[i]->shutdown) {
500 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
501 goto __error;
502 }
503 chip = usb_chip[i];
Oliver Neukum88a85162011-03-11 14:51:12 +0100504 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100505 break;
506 }
507 }
508 if (! chip) {
509 /* it's a fresh one.
510 * now look for an empty slot and create a new card instance
511 */
512 for (i = 0; i < SNDRV_CARDS; i++)
513 if (enable[i] && ! usb_chip[i] &&
514 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
515 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
516 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
517 goto __error;
518 }
519 snd_card_set_dev(chip->card, &intf->dev);
Oliver Neukum88a85162011-03-11 14:51:12 +0100520 chip->pm_intf = intf;
Daniel Macke5779992010-03-04 19:46:13 +0100521 break;
522 }
523 if (!chip) {
524 printk(KERN_ERR "no available usb audio device\n");
525 goto __error;
526 }
527 }
528
Daniel Mack7b6717e2010-09-02 17:13:15 +0800529 /*
530 * For devices with more than one control interface, we assume the
531 * first contains the audio controls. We might need a more specific
532 * check here in the future.
533 */
534 if (!chip->ctrl_intf)
535 chip->ctrl_intf = alts;
Daniel Mack79f920f2010-05-31 14:51:31 +0200536
Daniel Mack5875c2c2011-05-25 09:08:59 +0200537 chip->txfr_quirk = 0;
538 err = 1; /* continue */
539 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
540 /* need some special handlings */
541 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
542 goto __error;
543 }
544
Daniel Macke5779992010-03-04 19:46:13 +0100545 if (err > 0) {
546 /* create normal USB audio interfaces */
547 if (snd_usb_create_streams(chip, ifnum) < 0 ||
548 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
549 goto __error;
550 }
551 }
552
553 /* we are allowed to call snd_card_register() many times */
554 if (snd_card_register(chip->card) < 0) {
555 goto __error;
556 }
557
558 usb_chip[chip->index] = chip;
559 chip->num_interfaces++;
Oliver Neukum88a85162011-03-11 14:51:12 +0100560 chip->probing = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100561 mutex_unlock(&register_mutex);
562 return chip;
563
564 __error:
Thomas Pfaff61a6a102011-09-26 15:43:59 +0200565 if (chip) {
566 if (!chip->num_interfaces)
567 snd_card_free(chip->card);
568 chip->probing = 0;
569 }
Daniel Macke5779992010-03-04 19:46:13 +0100570 mutex_unlock(&register_mutex);
571 __err_val:
572 return NULL;
573}
574
575/*
576 * we need to take care of counter, since disconnection can be called also
577 * many times as well as usb_audio_probe().
578 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400579static void snd_usb_audio_disconnect(struct usb_device *dev,
580 struct snd_usb_audio *chip)
Daniel Macke5779992010-03-04 19:46:13 +0100581{
Daniel Macke5779992010-03-04 19:46:13 +0100582 struct snd_card *card;
Pavel Roskin03d2f442012-08-30 17:11:17 -0400583 struct list_head *p, *n;
Daniel Macke5779992010-03-04 19:46:13 +0100584
Pavel Roskin81b85b62011-07-06 11:20:13 -0400585 if (chip == (void *)-1L)
Daniel Macke5779992010-03-04 19:46:13 +0100586 return;
587
Daniel Macke5779992010-03-04 19:46:13 +0100588 card = chip->card;
Takashi Iwai34f3c892012-10-15 12:16:02 +0200589 down_write(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100590 chip->shutdown = 1;
Takashi Iwai10e44232012-11-13 11:22:48 +0100591 up_write(&chip->shutdown_rwsem);
592
593 mutex_lock(&register_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100594 chip->num_interfaces--;
595 if (chip->num_interfaces <= 0) {
596 snd_card_disconnect(card);
597 /* release the pcm resources */
598 list_for_each(p, &chip->pcm_list) {
599 snd_usb_stream_disconnect(p);
600 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200601 /* release the endpoint resources */
Pavel Roskin03d2f442012-08-30 17:11:17 -0400602 list_for_each_safe(p, n, &chip->ep_list) {
Daniel Mackedcd3632012-04-12 13:51:12 +0200603 snd_usb_endpoint_free(p);
604 }
Daniel Macke5779992010-03-04 19:46:13 +0100605 /* release the midi resources */
606 list_for_each(p, &chip->midi_list) {
607 snd_usbmidi_disconnect(p);
608 }
609 /* release mixer resources */
610 list_for_each(p, &chip->mixer_list) {
611 snd_usb_mixer_disconnect(p);
612 }
613 usb_chip[chip->index] = NULL;
614 mutex_unlock(&register_mutex);
615 snd_card_free_when_closed(card);
616 } else {
617 mutex_unlock(&register_mutex);
618 }
619}
620
621/*
622 * new 2.5 USB kernel API
623 */
624static int usb_audio_probe(struct usb_interface *intf,
625 const struct usb_device_id *id)
626{
Pavel Roskin81b85b62011-07-06 11:20:13 -0400627 struct snd_usb_audio *chip;
Daniel Macke5779992010-03-04 19:46:13 +0100628 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
629 if (chip) {
630 usb_set_intfdata(intf, chip);
631 return 0;
632 } else
633 return -EIO;
634}
635
636static void usb_audio_disconnect(struct usb_interface *intf)
637{
638 snd_usb_audio_disconnect(interface_to_usbdev(intf),
639 usb_get_intfdata(intf));
640}
641
642#ifdef CONFIG_PM
Oliver Neukum88a85162011-03-11 14:51:12 +0100643
644int snd_usb_autoresume(struct snd_usb_audio *chip)
645{
646 int err = -ENODEV;
647
Takashi Iwai34f3c892012-10-15 12:16:02 +0200648 down_read(&chip->shutdown_rwsem);
Takashi Iwai60af3d02013-04-25 07:38:15 +0200649 if (chip->probing)
650 err = 0;
651 else if (!chip->shutdown)
Oliver Neukum88a85162011-03-11 14:51:12 +0100652 err = usb_autopm_get_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200653 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100654
655 return err;
656}
657
658void snd_usb_autosuspend(struct snd_usb_audio *chip)
659{
Takashi Iwai34f3c892012-10-15 12:16:02 +0200660 down_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100661 if (!chip->shutdown && !chip->probing)
662 usb_autopm_put_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200663 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100664}
665
Daniel Macke5779992010-03-04 19:46:13 +0100666static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
667{
668 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Daniel Macke5779992010-03-04 19:46:13 +0100669 struct snd_usb_stream *as;
Oliver Neukumedf7de32011-03-11 13:19:43 +0100670 struct usb_mixer_interface *mixer;
Daniel Macke5779992010-03-04 19:46:13 +0100671
672 if (chip == (void *)-1L)
673 return 0;
674
Alan Stern5b1b0b82011-08-19 23:49:48 +0200675 if (!PMSG_IS_AUTO(message)) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100676 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
677 if (!chip->num_suspended_intf++) {
Eldad Zack88766f02013-04-03 23:18:49 +0200678 list_for_each_entry(as, &chip->pcm_list, list) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100679 snd_pcm_suspend_all(as->pcm);
Takashi Iwai384dc0852012-09-18 14:49:31 +0200680 as->substream[0].need_setup_ep =
681 as->substream[1].need_setup_ep = true;
Oliver Neukum88a85162011-03-11 14:51:12 +0100682 }
Antonio Ospiteaa53f982013-01-29 12:56:30 +0100683 }
Oliver Neukum88a85162011-03-11 14:51:12 +0100684 } else {
685 /*
686 * otherwise we keep the rest of the system in the dark
687 * to keep this transparent
688 */
689 if (!chip->num_suspended_intf++)
690 chip->autosuspended = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100691 }
692
Oliver Neukum88a85162011-03-11 14:51:12 +0100693 list_for_each_entry(mixer, &chip->mixer_list, list)
694 snd_usb_mixer_inactivate(mixer);
695
Daniel Macke5779992010-03-04 19:46:13 +0100696 return 0;
697}
698
699static int usb_audio_resume(struct usb_interface *intf)
700{
701 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Oliver Neukumedf7de32011-03-11 13:19:43 +0100702 struct usb_mixer_interface *mixer;
Oliver Neukum88a85162011-03-11 14:51:12 +0100703 int err = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100704
705 if (chip == (void *)-1L)
706 return 0;
707 if (--chip->num_suspended_intf)
708 return 0;
709 /*
710 * ALSA leaves material resumption to user space
Oliver Neukumedf7de32011-03-11 13:19:43 +0100711 * we just notify and restart the mixers
Daniel Macke5779992010-03-04 19:46:13 +0100712 */
Oliver Neukum88a85162011-03-11 14:51:12 +0100713 list_for_each_entry(mixer, &chip->mixer_list, list) {
714 err = snd_usb_mixer_activate(mixer);
715 if (err < 0)
716 goto err_out;
717 }
Daniel Macke5779992010-03-04 19:46:13 +0100718
Oliver Neukum88a85162011-03-11 14:51:12 +0100719 if (!chip->autosuspended)
720 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
721 chip->autosuspended = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100722
Oliver Neukum88a85162011-03-11 14:51:12 +0100723err_out:
724 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100725}
Randy Dunlap6407d472010-03-22 08:55:35 -0700726#else
727#define usb_audio_suspend NULL
728#define usb_audio_resume NULL
Daniel Macke5779992010-03-04 19:46:13 +0100729#endif /* CONFIG_PM */
730
731static struct usb_device_id usb_audio_ids [] = {
732#include "quirks-table.h"
733 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
734 .bInterfaceClass = USB_CLASS_AUDIO,
735 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
736 { } /* Terminating entry */
737};
Eldad Zackf9d35432013-04-03 23:18:50 +0200738MODULE_DEVICE_TABLE(usb, usb_audio_ids);
Daniel Macke5779992010-03-04 19:46:13 +0100739
740/*
741 * entry point for linux usb interface
742 */
743
744static struct usb_driver usb_audio_driver = {
745 .name = "snd-usb-audio",
746 .probe = usb_audio_probe,
747 .disconnect = usb_audio_disconnect,
748 .suspend = usb_audio_suspend,
749 .resume = usb_audio_resume,
750 .id_table = usb_audio_ids,
Oliver Neukum88a85162011-03-11 14:51:12 +0100751 .supports_autosuspend = 1,
Daniel Macke5779992010-03-04 19:46:13 +0100752};
753
Sachin Kamat6b5a7c62013-10-09 17:22:32 +0530754module_usb_driver(usb_audio_driver);