blob: 1a033177b83f63f94d1be2262ccc0553ac9b8034 [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;
Eldad Zackef02e292013-04-03 23:18:56 +020085static bool autoclock = true;
Daniel Macke5779992010-03-04 19:46:13 +010086
87module_param_array(index, int, NULL, 0444);
88MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
89module_param_array(id, charp, NULL, 0444);
90MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
91module_param_array(enable, bool, NULL, 0444);
92MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
93module_param_array(vid, int, NULL, 0444);
94MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
95module_param_array(pid, int, NULL, 0444);
96MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
97module_param(nrpacks, int, 0644);
98MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
Daniel Macke5779992010-03-04 19:46:13 +010099module_param_array(device_setup, int, NULL, 0444);
100MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
101module_param(ignore_ctl_error, bool, 0444);
102MODULE_PARM_DESC(ignore_ctl_error,
103 "Ignore errors from USB controller for mixer interfaces.");
Eldad Zackef02e292013-04-03 23:18:56 +0200104module_param(autoclock, bool, 0444);
105MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
Daniel Macke5779992010-03-04 19:46:13 +0100106
107/*
108 * we keep the snd_usb_audio_t instances by ourselves for merging
109 * the all interfaces on the same card as one sound device.
110 */
111
112static DEFINE_MUTEX(register_mutex);
113static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
114static struct usb_driver usb_audio_driver;
115
116/*
117 * disconnect streams
118 * called from snd_usb_audio_disconnect()
119 */
120static void snd_usb_stream_disconnect(struct list_head *head)
121{
122 int idx;
123 struct snd_usb_stream *as;
124 struct snd_usb_substream *subs;
125
126 as = list_entry(head, struct snd_usb_stream, list);
127 for (idx = 0; idx < 2; idx++) {
128 subs = &as->substream[idx];
129 if (!subs->num_formats)
Takashi Iwai76195fb2010-09-08 08:27:02 +0200130 continue;
Daniel Macke5779992010-03-04 19:46:13 +0100131 subs->interface = -1;
Daniel Mackedcd3632012-04-12 13:51:12 +0200132 subs->data_endpoint = NULL;
133 subs->sync_endpoint = NULL;
Daniel Macke5779992010-03-04 19:46:13 +0100134 }
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
Daniel Macke8e8bab2011-09-12 18:54:12 +0200187 if (! snd_usb_parse_audio_interface(chip, interface)) {
Daniel Macke5779992010-03-04 19:46:13 +0100188 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) {
Clemens Ladisch281a6ac2013-03-11 20:15:34 +0100250 /*
251 * Firmware writers cannot count to three. So to find
252 * the IAD on the NuForce UDH-100, also check the next
253 * interface.
254 */
255 struct usb_interface *iface =
256 usb_ifnum_to_if(dev, ctrlif + 1);
257 if (iface &&
258 iface->intf_assoc &&
259 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
260 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
261 assoc = iface->intf_assoc;
262 }
263
264 if (!assoc) {
Daniel Macke5779992010-03-04 19:46:13 +0100265 snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
266 return -EINVAL;
267 }
268
Daniel Macke5779992010-03-04 19:46:13 +0100269 for (i = 0; i < assoc->bInterfaceCount; i++) {
270 int intf = assoc->bFirstInterface + i;
271
272 if (intf != ctrlif)
273 snd_usb_create_stream(chip, ctrlif, intf);
274 }
275
276 break;
277 }
Daniel Macke5779992010-03-04 19:46:13 +0100278 }
279
280 return 0;
281}
282
283/*
284 * free the chip instance
285 *
286 * here we have to do not much, since pcm and controls are already freed
287 *
288 */
289
290static int snd_usb_audio_free(struct snd_usb_audio *chip)
291{
Daniel Mack596580d2012-04-12 13:51:10 +0200292 mutex_destroy(&chip->mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100293 kfree(chip);
294 return 0;
295}
296
297static int snd_usb_audio_dev_free(struct snd_device *device)
298{
299 struct snd_usb_audio *chip = device->device_data;
300 return snd_usb_audio_free(chip);
301}
302
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100303static void remove_trailing_spaces(char *str)
304{
305 char *p;
306
307 if (!*str)
308 return;
309 for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
310 *p = 0;
311}
Daniel Macke5779992010-03-04 19:46:13 +0100312
313/*
314 * create a chip instance and set its names.
315 */
316static int snd_usb_audio_create(struct usb_device *dev, int idx,
317 const struct snd_usb_audio_quirk *quirk,
318 struct snd_usb_audio **rchip)
319{
320 struct snd_card *card;
321 struct snd_usb_audio *chip;
322 int err, len;
323 char component[14];
324 static struct snd_device_ops ops = {
325 .dev_free = snd_usb_audio_dev_free,
326 };
327
328 *rchip = NULL;
329
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700330 switch (snd_usb_get_speed(dev)) {
331 case USB_SPEED_LOW:
332 case USB_SPEED_FULL:
333 case USB_SPEED_HIGH:
334 case USB_SPEED_SUPER:
335 break;
336 default:
Daniel Macke5779992010-03-04 19:46:13 +0100337 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
338 return -ENXIO;
339 }
340
341 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
342 if (err < 0) {
343 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
344 return err;
345 }
346
347 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
348 if (! chip) {
349 snd_card_free(card);
350 return -ENOMEM;
351 }
352
Daniel Mack596580d2012-04-12 13:51:10 +0200353 mutex_init(&chip->mutex);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200354 init_rwsem(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100355 chip->index = idx;
356 chip->dev = dev;
357 chip->card = card;
358 chip->setup = device_setup[idx];
359 chip->nrpacks = nrpacks;
Eldad Zackef02e292013-04-03 23:18:56 +0200360 chip->autoclock = autoclock;
Oliver Neukum88a85162011-03-11 14:51:12 +0100361 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100362
363 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
364 le16_to_cpu(dev->descriptor.idProduct));
365 INIT_LIST_HEAD(&chip->pcm_list);
Daniel Mackedcd3632012-04-12 13:51:12 +0200366 INIT_LIST_HEAD(&chip->ep_list);
Daniel Macke5779992010-03-04 19:46:13 +0100367 INIT_LIST_HEAD(&chip->midi_list);
368 INIT_LIST_HEAD(&chip->mixer_list);
369
370 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
371 snd_usb_audio_free(chip);
372 snd_card_free(card);
373 return err;
374 }
375
376 strcpy(card->driver, "USB-Audio");
377 sprintf(component, "USB%04x:%04x",
378 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
379 snd_component_add(card, component);
380
381 /* retrieve the device string as shortname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100382 if (quirk && quirk->product_name && *quirk->product_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100383 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
384 } else {
385 if (!dev->descriptor.iProduct ||
386 usb_string(dev, dev->descriptor.iProduct,
387 card->shortname, sizeof(card->shortname)) <= 0) {
388 /* no name available from anywhere, so use ID */
389 sprintf(card->shortname, "USB Device %#04x:%#04x",
390 USB_ID_VENDOR(chip->usb_id),
391 USB_ID_PRODUCT(chip->usb_id));
392 }
393 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100394 remove_trailing_spaces(card->shortname);
Daniel Macke5779992010-03-04 19:46:13 +0100395
396 /* retrieve the vendor and device strings as longname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100397 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100398 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
399 } else {
400 if (dev->descriptor.iManufacturer)
401 len = usb_string(dev, dev->descriptor.iManufacturer,
402 card->longname, sizeof(card->longname));
403 else
404 len = 0;
405 /* we don't really care if there isn't any vendor string */
406 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100407 if (len > 0) {
408 remove_trailing_spaces(card->longname);
409 if (*card->longname)
410 strlcat(card->longname, " ", sizeof(card->longname));
411 }
Daniel Macke5779992010-03-04 19:46:13 +0100412
413 strlcat(card->longname, card->shortname, sizeof(card->longname));
414
415 len = strlcat(card->longname, " at ", sizeof(card->longname));
416
417 if (len < sizeof(card->longname))
418 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
419
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700420 switch (snd_usb_get_speed(dev)) {
421 case USB_SPEED_LOW:
422 strlcat(card->longname, ", low speed", sizeof(card->longname));
423 break;
424 case USB_SPEED_FULL:
425 strlcat(card->longname, ", full speed", sizeof(card->longname));
426 break;
427 case USB_SPEED_HIGH:
428 strlcat(card->longname, ", high speed", sizeof(card->longname));
429 break;
430 case USB_SPEED_SUPER:
431 strlcat(card->longname, ", super speed", sizeof(card->longname));
432 break;
433 default:
434 break;
435 }
Daniel Macke5779992010-03-04 19:46:13 +0100436
437 snd_usb_audio_create_proc(chip);
438
439 *rchip = chip;
440 return 0;
441}
442
443/*
444 * probe the active usb device
445 *
446 * note that this can be called multiple times per a device, when it
447 * includes multiple audio control interfaces.
448 *
449 * thus we check the usb device pointer and creates the card instance
450 * only at the first time. the successive calls of this function will
451 * append the pcm interface to the corresponding card.
452 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400453static struct snd_usb_audio *
454snd_usb_audio_probe(struct usb_device *dev,
455 struct usb_interface *intf,
456 const struct usb_device_id *usb_id)
Daniel Macke5779992010-03-04 19:46:13 +0100457{
458 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
459 int i, err;
460 struct snd_usb_audio *chip;
461 struct usb_host_interface *alts;
462 int ifnum;
463 u32 id;
464
465 alts = &intf->altsetting[0];
466 ifnum = get_iface_desc(alts)->bInterfaceNumber;
467 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
468 le16_to_cpu(dev->descriptor.idProduct));
469 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
470 goto __err_val;
471
472 if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
473 goto __err_val;
474
475 /*
476 * found a config. now register to ALSA
477 */
478
479 /* check whether it's already registered */
480 chip = NULL;
481 mutex_lock(&register_mutex);
482 for (i = 0; i < SNDRV_CARDS; i++) {
483 if (usb_chip[i] && usb_chip[i]->dev == dev) {
484 if (usb_chip[i]->shutdown) {
485 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
486 goto __error;
487 }
488 chip = usb_chip[i];
Oliver Neukum88a85162011-03-11 14:51:12 +0100489 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100490 break;
491 }
492 }
493 if (! chip) {
494 /* it's a fresh one.
495 * now look for an empty slot and create a new card instance
496 */
497 for (i = 0; i < SNDRV_CARDS; i++)
498 if (enable[i] && ! usb_chip[i] &&
499 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
500 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
501 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
502 goto __error;
503 }
504 snd_card_set_dev(chip->card, &intf->dev);
Oliver Neukum88a85162011-03-11 14:51:12 +0100505 chip->pm_intf = intf;
Daniel Macke5779992010-03-04 19:46:13 +0100506 break;
507 }
508 if (!chip) {
509 printk(KERN_ERR "no available usb audio device\n");
510 goto __error;
511 }
512 }
513
Daniel Mack7b6717e2010-09-02 17:13:15 +0800514 /*
515 * For devices with more than one control interface, we assume the
516 * first contains the audio controls. We might need a more specific
517 * check here in the future.
518 */
519 if (!chip->ctrl_intf)
520 chip->ctrl_intf = alts;
Daniel Mack79f920f2010-05-31 14:51:31 +0200521
Daniel Mack5875c2c2011-05-25 09:08:59 +0200522 chip->txfr_quirk = 0;
523 err = 1; /* continue */
524 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
525 /* need some special handlings */
526 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
527 goto __error;
528 }
529
Daniel Macke5779992010-03-04 19:46:13 +0100530 if (err > 0) {
531 /* create normal USB audio interfaces */
532 if (snd_usb_create_streams(chip, ifnum) < 0 ||
533 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
534 goto __error;
535 }
536 }
537
538 /* we are allowed to call snd_card_register() many times */
539 if (snd_card_register(chip->card) < 0) {
540 goto __error;
541 }
542
543 usb_chip[chip->index] = chip;
544 chip->num_interfaces++;
Oliver Neukum88a85162011-03-11 14:51:12 +0100545 chip->probing = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100546 mutex_unlock(&register_mutex);
547 return chip;
548
549 __error:
Thomas Pfaff61a6a102011-09-26 15:43:59 +0200550 if (chip) {
551 if (!chip->num_interfaces)
552 snd_card_free(chip->card);
553 chip->probing = 0;
554 }
Daniel Macke5779992010-03-04 19:46:13 +0100555 mutex_unlock(&register_mutex);
556 __err_val:
557 return NULL;
558}
559
560/*
561 * we need to take care of counter, since disconnection can be called also
562 * many times as well as usb_audio_probe().
563 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400564static void snd_usb_audio_disconnect(struct usb_device *dev,
565 struct snd_usb_audio *chip)
Daniel Macke5779992010-03-04 19:46:13 +0100566{
Daniel Macke5779992010-03-04 19:46:13 +0100567 struct snd_card *card;
Pavel Roskin03d2f442012-08-30 17:11:17 -0400568 struct list_head *p, *n;
Daniel Macke5779992010-03-04 19:46:13 +0100569
Pavel Roskin81b85b62011-07-06 11:20:13 -0400570 if (chip == (void *)-1L)
Daniel Macke5779992010-03-04 19:46:13 +0100571 return;
572
Daniel Macke5779992010-03-04 19:46:13 +0100573 card = chip->card;
Takashi Iwai34f3c892012-10-15 12:16:02 +0200574 down_write(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100575 chip->shutdown = 1;
Takashi Iwai10e44232012-11-13 11:22:48 +0100576 up_write(&chip->shutdown_rwsem);
577
578 mutex_lock(&register_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100579 chip->num_interfaces--;
580 if (chip->num_interfaces <= 0) {
581 snd_card_disconnect(card);
582 /* release the pcm resources */
583 list_for_each(p, &chip->pcm_list) {
584 snd_usb_stream_disconnect(p);
585 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200586 /* release the endpoint resources */
Pavel Roskin03d2f442012-08-30 17:11:17 -0400587 list_for_each_safe(p, n, &chip->ep_list) {
Daniel Mackedcd3632012-04-12 13:51:12 +0200588 snd_usb_endpoint_free(p);
589 }
Daniel Macke5779992010-03-04 19:46:13 +0100590 /* release the midi resources */
591 list_for_each(p, &chip->midi_list) {
592 snd_usbmidi_disconnect(p);
593 }
594 /* release mixer resources */
595 list_for_each(p, &chip->mixer_list) {
596 snd_usb_mixer_disconnect(p);
597 }
598 usb_chip[chip->index] = NULL;
599 mutex_unlock(&register_mutex);
600 snd_card_free_when_closed(card);
601 } else {
602 mutex_unlock(&register_mutex);
603 }
604}
605
606/*
607 * new 2.5 USB kernel API
608 */
609static int usb_audio_probe(struct usb_interface *intf,
610 const struct usb_device_id *id)
611{
Pavel Roskin81b85b62011-07-06 11:20:13 -0400612 struct snd_usb_audio *chip;
Daniel Macke5779992010-03-04 19:46:13 +0100613 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
614 if (chip) {
615 usb_set_intfdata(intf, chip);
616 return 0;
617 } else
618 return -EIO;
619}
620
621static void usb_audio_disconnect(struct usb_interface *intf)
622{
623 snd_usb_audio_disconnect(interface_to_usbdev(intf),
624 usb_get_intfdata(intf));
625}
626
627#ifdef CONFIG_PM
Oliver Neukum88a85162011-03-11 14:51:12 +0100628
629int snd_usb_autoresume(struct snd_usb_audio *chip)
630{
631 int err = -ENODEV;
632
Takashi Iwai34f3c892012-10-15 12:16:02 +0200633 down_read(&chip->shutdown_rwsem);
Takashi Iwai60af3d02013-04-25 07:38:15 +0200634 if (chip->probing)
635 err = 0;
636 else if (!chip->shutdown)
Oliver Neukum88a85162011-03-11 14:51:12 +0100637 err = usb_autopm_get_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200638 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100639
640 return err;
641}
642
643void snd_usb_autosuspend(struct snd_usb_audio *chip)
644{
Takashi Iwai34f3c892012-10-15 12:16:02 +0200645 down_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100646 if (!chip->shutdown && !chip->probing)
647 usb_autopm_put_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200648 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100649}
650
Daniel Macke5779992010-03-04 19:46:13 +0100651static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
652{
653 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Daniel Macke5779992010-03-04 19:46:13 +0100654 struct snd_usb_stream *as;
Oliver Neukumedf7de32011-03-11 13:19:43 +0100655 struct usb_mixer_interface *mixer;
Daniel Macke5779992010-03-04 19:46:13 +0100656
657 if (chip == (void *)-1L)
658 return 0;
659
Alan Stern5b1b0b82011-08-19 23:49:48 +0200660 if (!PMSG_IS_AUTO(message)) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100661 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
662 if (!chip->num_suspended_intf++) {
Eldad Zack88766f02013-04-03 23:18:49 +0200663 list_for_each_entry(as, &chip->pcm_list, list) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100664 snd_pcm_suspend_all(as->pcm);
Takashi Iwai384dc0852012-09-18 14:49:31 +0200665 as->substream[0].need_setup_ep =
666 as->substream[1].need_setup_ep = true;
Oliver Neukum88a85162011-03-11 14:51:12 +0100667 }
Antonio Ospiteaa53f982013-01-29 12:56:30 +0100668 }
Oliver Neukum88a85162011-03-11 14:51:12 +0100669 } else {
670 /*
671 * otherwise we keep the rest of the system in the dark
672 * to keep this transparent
673 */
674 if (!chip->num_suspended_intf++)
675 chip->autosuspended = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100676 }
677
Oliver Neukum88a85162011-03-11 14:51:12 +0100678 list_for_each_entry(mixer, &chip->mixer_list, list)
679 snd_usb_mixer_inactivate(mixer);
680
Daniel Macke5779992010-03-04 19:46:13 +0100681 return 0;
682}
683
684static int usb_audio_resume(struct usb_interface *intf)
685{
686 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Oliver Neukumedf7de32011-03-11 13:19:43 +0100687 struct usb_mixer_interface *mixer;
Oliver Neukum88a85162011-03-11 14:51:12 +0100688 int err = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100689
690 if (chip == (void *)-1L)
691 return 0;
692 if (--chip->num_suspended_intf)
693 return 0;
694 /*
695 * ALSA leaves material resumption to user space
Oliver Neukumedf7de32011-03-11 13:19:43 +0100696 * we just notify and restart the mixers
Daniel Macke5779992010-03-04 19:46:13 +0100697 */
Oliver Neukum88a85162011-03-11 14:51:12 +0100698 list_for_each_entry(mixer, &chip->mixer_list, list) {
699 err = snd_usb_mixer_activate(mixer);
700 if (err < 0)
701 goto err_out;
702 }
Daniel Macke5779992010-03-04 19:46:13 +0100703
Oliver Neukum88a85162011-03-11 14:51:12 +0100704 if (!chip->autosuspended)
705 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
706 chip->autosuspended = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100707
Oliver Neukum88a85162011-03-11 14:51:12 +0100708err_out:
709 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100710}
Randy Dunlap6407d472010-03-22 08:55:35 -0700711#else
712#define usb_audio_suspend NULL
713#define usb_audio_resume NULL
Daniel Macke5779992010-03-04 19:46:13 +0100714#endif /* CONFIG_PM */
715
716static struct usb_device_id usb_audio_ids [] = {
717#include "quirks-table.h"
718 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
719 .bInterfaceClass = USB_CLASS_AUDIO,
720 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
721 { } /* Terminating entry */
722};
Eldad Zackf9d35432013-04-03 23:18:50 +0200723MODULE_DEVICE_TABLE(usb, usb_audio_ids);
Daniel Macke5779992010-03-04 19:46:13 +0100724
725/*
726 * entry point for linux usb interface
727 */
728
729static struct usb_driver usb_audio_driver = {
730 .name = "snd-usb-audio",
731 .probe = usb_audio_probe,
732 .disconnect = usb_audio_disconnect,
733 .suspend = usb_audio_suspend,
734 .resume = usb_audio_resume,
735 .id_table = usb_audio_ids,
Oliver Neukum88a85162011-03-11 14:51:12 +0100736 .supports_autosuspend = 1,
Daniel Macke5779992010-03-04 19:46:13 +0100737};
738
739static int __init snd_usb_audio_init(void)
740{
741 if (nrpacks < 1 || nrpacks > MAX_PACKS) {
742 printk(KERN_WARNING "invalid nrpacks value.\n");
743 return -EINVAL;
744 }
745 return usb_register(&usb_audio_driver);
746}
747
748static void __exit snd_usb_audio_cleanup(void)
749{
750 usb_deregister(&usb_audio_driver);
751}
752
753module_init(snd_usb_audio_init);
754module_exit(snd_usb_audio_cleanup);