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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) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100142 dev_err(&dev->dev, "%u:%d : does not exist\n",
143 ctrlif, interface);
Daniel Macke5779992010-03-04 19:46:13 +0100144 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)) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100168 dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n",
169 ctrlif, interface);
Daniel Macke5779992010-03-04 19:46:13 +0100170 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) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100179 dev_err(&dev->dev,
180 "%u:%d: cannot create sequencer device\n",
181 ctrlif, interface);
Daniel Macke5779992010-03-04 19:46:13 +0100182 return -EINVAL;
183 }
184 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
185
186 return 0;
187 }
188
189 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
190 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
191 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100192 dev_dbg(&dev->dev,
193 "%u:%d: skipping non-supported interface %d\n",
194 ctrlif, interface, altsd->bInterfaceClass);
Daniel Macke5779992010-03-04 19:46:13 +0100195 /* skip non-supported classes */
196 return -EINVAL;
197 }
198
199 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100200 dev_err(&dev->dev, "low speed audio streaming not supported\n");
Daniel Macke5779992010-03-04 19:46:13 +0100201 return -EINVAL;
202 }
203
Daniel Macke8e8bab2011-09-12 18:54:12 +0200204 if (! snd_usb_parse_audio_interface(chip, interface)) {
Daniel Macke5779992010-03-04 19:46:13 +0100205 usb_set_interface(dev, interface, 0); /* reset the current interface */
206 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
207 return -EINVAL;
208 }
209
210 return 0;
211}
212
213/*
214 * parse audio control descriptor and create pcm/midi streams
215 */
216static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
217{
218 struct usb_device *dev = chip->dev;
219 struct usb_host_interface *host_iface;
220 struct usb_interface_descriptor *altsd;
221 void *control_header;
222 int i, protocol;
223
224 /* find audiocontrol interface */
225 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
226 control_header = snd_usb_find_csint_desc(host_iface->extra,
227 host_iface->extralen,
228 NULL, UAC_HEADER);
229 altsd = get_iface_desc(host_iface);
230 protocol = altsd->bInterfaceProtocol;
231
232 if (!control_header) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100233 dev_err(&dev->dev, "cannot find UAC_HEADER\n");
Daniel Macke5779992010-03-04 19:46:13 +0100234 return -EINVAL;
235 }
236
237 switch (protocol) {
Clemens Ladischa2acad82010-09-03 10:53:11 +0200238 default:
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100239 dev_warn(&dev->dev,
240 "unknown interface protocol %#02x, assuming v1\n",
241 protocol);
Clemens Ladischa2acad82010-09-03 10:53:11 +0200242 /* fall through */
243
Daniel Macke5779992010-03-04 19:46:13 +0100244 case UAC_VERSION_1: {
Daniel Mack69da9bc2010-06-16 17:57:28 +0200245 struct uac1_ac_header_descriptor *h1 = control_header;
Daniel Macke5779992010-03-04 19:46:13 +0100246
247 if (!h1->bInCollection) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100248 dev_info(&dev->dev, "skipping empty audio interface (v1)\n");
Daniel Macke5779992010-03-04 19:46:13 +0100249 return -EINVAL;
250 }
251
252 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100253 dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n");
Daniel Macke5779992010-03-04 19:46:13 +0100254 return -EINVAL;
255 }
256
257 for (i = 0; i < h1->bInCollection; i++)
258 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
259
260 break;
261 }
262
263 case UAC_VERSION_2: {
Daniel Macke5779992010-03-04 19:46:13 +0100264 struct usb_interface_assoc_descriptor *assoc =
265 usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
266
267 if (!assoc) {
Clemens Ladisch281a6ac2013-03-11 20:15:34 +0100268 /*
269 * Firmware writers cannot count to three. So to find
270 * the IAD on the NuForce UDH-100, also check the next
271 * interface.
272 */
273 struct usb_interface *iface =
274 usb_ifnum_to_if(dev, ctrlif + 1);
275 if (iface &&
276 iface->intf_assoc &&
277 iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
278 iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
279 assoc = iface->intf_assoc;
280 }
281
282 if (!assoc) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100283 dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n");
Daniel Macke5779992010-03-04 19:46:13 +0100284 return -EINVAL;
285 }
286
Daniel Macke5779992010-03-04 19:46:13 +0100287 for (i = 0; i < assoc->bInterfaceCount; i++) {
288 int intf = assoc->bFirstInterface + i;
289
290 if (intf != ctrlif)
291 snd_usb_create_stream(chip, ctrlif, intf);
292 }
293
294 break;
295 }
Daniel Macke5779992010-03-04 19:46:13 +0100296 }
297
298 return 0;
299}
300
301/*
302 * free the chip instance
303 *
304 * here we have to do not much, since pcm and controls are already freed
305 *
306 */
307
308static int snd_usb_audio_free(struct snd_usb_audio *chip)
309{
Daniel Mack596580d2012-04-12 13:51:10 +0200310 mutex_destroy(&chip->mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100311 kfree(chip);
312 return 0;
313}
314
315static int snd_usb_audio_dev_free(struct snd_device *device)
316{
317 struct snd_usb_audio *chip = device->device_data;
318 return snd_usb_audio_free(chip);
319}
320
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100321static void remove_trailing_spaces(char *str)
322{
323 char *p;
324
325 if (!*str)
326 return;
327 for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
328 *p = 0;
329}
Daniel Macke5779992010-03-04 19:46:13 +0100330
331/*
332 * create a chip instance and set its names.
333 */
Takashi Iwai874b8d42014-01-29 14:22:20 +0100334static int snd_usb_audio_create(struct usb_interface *intf,
335 struct usb_device *dev, int idx,
Daniel Macke5779992010-03-04 19:46:13 +0100336 const struct snd_usb_audio_quirk *quirk,
337 struct snd_usb_audio **rchip)
338{
339 struct snd_card *card;
340 struct snd_usb_audio *chip;
341 int err, len;
342 char component[14];
343 static struct snd_device_ops ops = {
344 .dev_free = snd_usb_audio_dev_free,
345 };
346
347 *rchip = NULL;
348
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700349 switch (snd_usb_get_speed(dev)) {
350 case USB_SPEED_LOW:
351 case USB_SPEED_FULL:
352 case USB_SPEED_HIGH:
Thomas Pugliesedf3774c2013-10-01 14:32:15 -0500353 case USB_SPEED_WIRELESS:
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700354 case USB_SPEED_SUPER:
355 break;
356 default:
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100357 dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
Daniel Macke5779992010-03-04 19:46:13 +0100358 return -ENXIO;
359 }
360
Takashi Iwai874b8d42014-01-29 14:22:20 +0100361 err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
362 0, &card);
Daniel Macke5779992010-03-04 19:46:13 +0100363 if (err < 0) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100364 dev_err(&dev->dev, "cannot create card instance %d\n", idx);
Daniel Macke5779992010-03-04 19:46:13 +0100365 return err;
366 }
367
368 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
369 if (! chip) {
370 snd_card_free(card);
371 return -ENOMEM;
372 }
373
Daniel Mack596580d2012-04-12 13:51:10 +0200374 mutex_init(&chip->mutex);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200375 init_rwsem(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100376 chip->index = idx;
377 chip->dev = dev;
378 chip->card = card;
379 chip->setup = device_setup[idx];
Eldad Zackef02e292013-04-03 23:18:56 +0200380 chip->autoclock = autoclock;
Oliver Neukum88a85162011-03-11 14:51:12 +0100381 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100382
383 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
384 le16_to_cpu(dev->descriptor.idProduct));
385 INIT_LIST_HEAD(&chip->pcm_list);
Daniel Mackedcd3632012-04-12 13:51:12 +0200386 INIT_LIST_HEAD(&chip->ep_list);
Daniel Macke5779992010-03-04 19:46:13 +0100387 INIT_LIST_HEAD(&chip->midi_list);
388 INIT_LIST_HEAD(&chip->mixer_list);
389
390 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
391 snd_usb_audio_free(chip);
392 snd_card_free(card);
393 return err;
394 }
395
396 strcpy(card->driver, "USB-Audio");
397 sprintf(component, "USB%04x:%04x",
398 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
399 snd_component_add(card, component);
400
401 /* retrieve the device string as shortname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100402 if (quirk && quirk->product_name && *quirk->product_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100403 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
404 } else {
405 if (!dev->descriptor.iProduct ||
406 usb_string(dev, dev->descriptor.iProduct,
407 card->shortname, sizeof(card->shortname)) <= 0) {
408 /* no name available from anywhere, so use ID */
409 sprintf(card->shortname, "USB Device %#04x:%#04x",
410 USB_ID_VENDOR(chip->usb_id),
411 USB_ID_PRODUCT(chip->usb_id));
412 }
413 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100414 remove_trailing_spaces(card->shortname);
Daniel Macke5779992010-03-04 19:46:13 +0100415
416 /* retrieve the vendor and device strings as longname */
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100417 if (quirk && quirk->vendor_name && *quirk->vendor_name) {
Daniel Macke5779992010-03-04 19:46:13 +0100418 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
419 } else {
420 if (dev->descriptor.iManufacturer)
421 len = usb_string(dev, dev->descriptor.iManufacturer,
422 card->longname, sizeof(card->longname));
423 else
424 len = 0;
425 /* we don't really care if there isn't any vendor string */
426 }
Takashi Iwai3ffc1222011-03-21 12:00:00 +0100427 if (len > 0) {
428 remove_trailing_spaces(card->longname);
429 if (*card->longname)
430 strlcat(card->longname, " ", sizeof(card->longname));
431 }
Daniel Macke5779992010-03-04 19:46:13 +0100432
433 strlcat(card->longname, card->shortname, sizeof(card->longname));
434
435 len = strlcat(card->longname, " at ", sizeof(card->longname));
436
437 if (len < sizeof(card->longname))
438 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
439
Paul Zimmerman4f4e8f62010-08-13 12:42:07 -0700440 switch (snd_usb_get_speed(dev)) {
441 case USB_SPEED_LOW:
442 strlcat(card->longname, ", low speed", sizeof(card->longname));
443 break;
444 case USB_SPEED_FULL:
445 strlcat(card->longname, ", full speed", sizeof(card->longname));
446 break;
447 case USB_SPEED_HIGH:
448 strlcat(card->longname, ", high speed", sizeof(card->longname));
449 break;
450 case USB_SPEED_SUPER:
451 strlcat(card->longname, ", super speed", sizeof(card->longname));
452 break;
453 default:
454 break;
455 }
Daniel Macke5779992010-03-04 19:46:13 +0100456
457 snd_usb_audio_create_proc(chip);
458
459 *rchip = chip;
460 return 0;
461}
462
463/*
464 * probe the active usb device
465 *
466 * note that this can be called multiple times per a device, when it
467 * includes multiple audio control interfaces.
468 *
469 * thus we check the usb device pointer and creates the card instance
470 * only at the first time. the successive calls of this function will
471 * append the pcm interface to the corresponding card.
472 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400473static struct snd_usb_audio *
474snd_usb_audio_probe(struct usb_device *dev,
475 struct usb_interface *intf,
476 const struct usb_device_id *usb_id)
Daniel Macke5779992010-03-04 19:46:13 +0100477{
478 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
479 int i, err;
480 struct snd_usb_audio *chip;
481 struct usb_host_interface *alts;
482 int ifnum;
483 u32 id;
484
485 alts = &intf->altsetting[0];
486 ifnum = get_iface_desc(alts)->bInterfaceNumber;
487 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
488 le16_to_cpu(dev->descriptor.idProduct));
489 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
490 goto __err_val;
491
492 if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
493 goto __err_val;
494
495 /*
496 * found a config. now register to ALSA
497 */
498
499 /* check whether it's already registered */
500 chip = NULL;
501 mutex_lock(&register_mutex);
502 for (i = 0; i < SNDRV_CARDS; i++) {
503 if (usb_chip[i] && usb_chip[i]->dev == dev) {
504 if (usb_chip[i]->shutdown) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100505 dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n");
Daniel Macke5779992010-03-04 19:46:13 +0100506 goto __error;
507 }
508 chip = usb_chip[i];
Oliver Neukum88a85162011-03-11 14:51:12 +0100509 chip->probing = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100510 break;
511 }
512 }
513 if (! chip) {
514 /* it's a fresh one.
515 * now look for an empty slot and create a new card instance
516 */
517 for (i = 0; i < SNDRV_CARDS; i++)
518 if (enable[i] && ! usb_chip[i] &&
519 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
520 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
Takashi Iwai874b8d42014-01-29 14:22:20 +0100521 if (snd_usb_audio_create(intf, dev, i, quirk,
522 &chip) < 0) {
Daniel Macke5779992010-03-04 19:46:13 +0100523 goto __error;
524 }
Oliver Neukum88a85162011-03-11 14:51:12 +0100525 chip->pm_intf = intf;
Daniel Macke5779992010-03-04 19:46:13 +0100526 break;
527 }
528 if (!chip) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100529 dev_err(&dev->dev, "no available usb audio device\n");
Daniel Macke5779992010-03-04 19:46:13 +0100530 goto __error;
531 }
532 }
533
Daniel Mack7b6717e2010-09-02 17:13:15 +0800534 /*
535 * For devices with more than one control interface, we assume the
536 * first contains the audio controls. We might need a more specific
537 * check here in the future.
538 */
539 if (!chip->ctrl_intf)
540 chip->ctrl_intf = alts;
Daniel Mack79f920f2010-05-31 14:51:31 +0200541
Daniel Mack5875c2c2011-05-25 09:08:59 +0200542 chip->txfr_quirk = 0;
543 err = 1; /* continue */
544 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
545 /* need some special handlings */
546 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
547 goto __error;
548 }
549
Daniel Macke5779992010-03-04 19:46:13 +0100550 if (err > 0) {
551 /* create normal USB audio interfaces */
552 if (snd_usb_create_streams(chip, ifnum) < 0 ||
553 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
554 goto __error;
555 }
556 }
557
558 /* we are allowed to call snd_card_register() many times */
559 if (snd_card_register(chip->card) < 0) {
560 goto __error;
561 }
562
563 usb_chip[chip->index] = chip;
564 chip->num_interfaces++;
Oliver Neukum88a85162011-03-11 14:51:12 +0100565 chip->probing = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100566 mutex_unlock(&register_mutex);
567 return chip;
568
569 __error:
Thomas Pfaff61a6a102011-09-26 15:43:59 +0200570 if (chip) {
571 if (!chip->num_interfaces)
572 snd_card_free(chip->card);
573 chip->probing = 0;
574 }
Daniel Macke5779992010-03-04 19:46:13 +0100575 mutex_unlock(&register_mutex);
576 __err_val:
577 return NULL;
578}
579
580/*
581 * we need to take care of counter, since disconnection can be called also
582 * many times as well as usb_audio_probe().
583 */
Pavel Roskin81b85b62011-07-06 11:20:13 -0400584static void snd_usb_audio_disconnect(struct usb_device *dev,
585 struct snd_usb_audio *chip)
Daniel Macke5779992010-03-04 19:46:13 +0100586{
Daniel Macke5779992010-03-04 19:46:13 +0100587 struct snd_card *card;
Pavel Roskin03d2f442012-08-30 17:11:17 -0400588 struct list_head *p, *n;
Daniel Macke5779992010-03-04 19:46:13 +0100589
Pavel Roskin81b85b62011-07-06 11:20:13 -0400590 if (chip == (void *)-1L)
Daniel Macke5779992010-03-04 19:46:13 +0100591 return;
592
Daniel Macke5779992010-03-04 19:46:13 +0100593 card = chip->card;
Takashi Iwai34f3c892012-10-15 12:16:02 +0200594 down_write(&chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100595 chip->shutdown = 1;
Takashi Iwai10e44232012-11-13 11:22:48 +0100596 up_write(&chip->shutdown_rwsem);
597
598 mutex_lock(&register_mutex);
Daniel Macke5779992010-03-04 19:46:13 +0100599 chip->num_interfaces--;
600 if (chip->num_interfaces <= 0) {
601 snd_card_disconnect(card);
602 /* release the pcm resources */
603 list_for_each(p, &chip->pcm_list) {
604 snd_usb_stream_disconnect(p);
605 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200606 /* release the endpoint resources */
Pavel Roskin03d2f442012-08-30 17:11:17 -0400607 list_for_each_safe(p, n, &chip->ep_list) {
Daniel Mackedcd3632012-04-12 13:51:12 +0200608 snd_usb_endpoint_free(p);
609 }
Daniel Macke5779992010-03-04 19:46:13 +0100610 /* release the midi resources */
611 list_for_each(p, &chip->midi_list) {
612 snd_usbmidi_disconnect(p);
613 }
614 /* release mixer resources */
615 list_for_each(p, &chip->mixer_list) {
616 snd_usb_mixer_disconnect(p);
617 }
618 usb_chip[chip->index] = NULL;
619 mutex_unlock(&register_mutex);
620 snd_card_free_when_closed(card);
621 } else {
622 mutex_unlock(&register_mutex);
623 }
624}
625
626/*
627 * new 2.5 USB kernel API
628 */
629static int usb_audio_probe(struct usb_interface *intf,
630 const struct usb_device_id *id)
631{
Pavel Roskin81b85b62011-07-06 11:20:13 -0400632 struct snd_usb_audio *chip;
Daniel Macke5779992010-03-04 19:46:13 +0100633 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
634 if (chip) {
635 usb_set_intfdata(intf, chip);
636 return 0;
637 } else
638 return -EIO;
639}
640
641static void usb_audio_disconnect(struct usb_interface *intf)
642{
643 snd_usb_audio_disconnect(interface_to_usbdev(intf),
644 usb_get_intfdata(intf));
645}
646
647#ifdef CONFIG_PM
Oliver Neukum88a85162011-03-11 14:51:12 +0100648
649int snd_usb_autoresume(struct snd_usb_audio *chip)
650{
651 int err = -ENODEV;
652
Takashi Iwai34f3c892012-10-15 12:16:02 +0200653 down_read(&chip->shutdown_rwsem);
Takashi Iwai1ee23fe2014-05-02 18:17:06 +0200654 if (chip->probing && chip->in_pm)
Takashi Iwai60af3d02013-04-25 07:38:15 +0200655 err = 0;
656 else if (!chip->shutdown)
Oliver Neukum88a85162011-03-11 14:51:12 +0100657 err = usb_autopm_get_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200658 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100659
660 return err;
661}
662
663void snd_usb_autosuspend(struct snd_usb_audio *chip)
664{
Takashi Iwai34f3c892012-10-15 12:16:02 +0200665 down_read(&chip->shutdown_rwsem);
Takashi Iwai1ee23fe2014-05-02 18:17:06 +0200666 if (!chip->shutdown && !chip->probing && !chip->in_pm)
Oliver Neukum88a85162011-03-11 14:51:12 +0100667 usb_autopm_put_interface(chip->pm_intf);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200668 up_read(&chip->shutdown_rwsem);
Oliver Neukum88a85162011-03-11 14:51:12 +0100669}
670
Daniel Macke5779992010-03-04 19:46:13 +0100671static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
672{
673 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Daniel Macke5779992010-03-04 19:46:13 +0100674 struct snd_usb_stream *as;
Oliver Neukumedf7de32011-03-11 13:19:43 +0100675 struct usb_mixer_interface *mixer;
Daniel Macke5779992010-03-04 19:46:13 +0100676
677 if (chip == (void *)-1L)
678 return 0;
679
Alan Stern5b1b0b82011-08-19 23:49:48 +0200680 if (!PMSG_IS_AUTO(message)) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100681 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
682 if (!chip->num_suspended_intf++) {
Eldad Zack88766f02013-04-03 23:18:49 +0200683 list_for_each_entry(as, &chip->pcm_list, list) {
Oliver Neukum88a85162011-03-11 14:51:12 +0100684 snd_pcm_suspend_all(as->pcm);
Takashi Iwai384dc0852012-09-18 14:49:31 +0200685 as->substream[0].need_setup_ep =
686 as->substream[1].need_setup_ep = true;
Oliver Neukum88a85162011-03-11 14:51:12 +0100687 }
Antonio Ospiteaa53f982013-01-29 12:56:30 +0100688 }
Oliver Neukum88a85162011-03-11 14:51:12 +0100689 } else {
690 /*
691 * otherwise we keep the rest of the system in the dark
692 * to keep this transparent
693 */
694 if (!chip->num_suspended_intf++)
695 chip->autosuspended = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100696 }
697
Takashi Iwai1c53e722014-05-02 18:14:42 +0200698 if (chip->num_suspended_intf == 1)
699 list_for_each_entry(mixer, &chip->mixer_list, list)
700 snd_usb_mixer_suspend(mixer);
Oliver Neukum88a85162011-03-11 14:51:12 +0100701
Daniel Macke5779992010-03-04 19:46:13 +0100702 return 0;
703}
704
Takashi Iwai400362f2014-01-20 16:51:16 +0100705static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume)
Daniel Macke5779992010-03-04 19:46:13 +0100706{
707 struct snd_usb_audio *chip = usb_get_intfdata(intf);
Oliver Neukumedf7de32011-03-11 13:19:43 +0100708 struct usb_mixer_interface *mixer;
Oliver Neukum88a85162011-03-11 14:51:12 +0100709 int err = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100710
711 if (chip == (void *)-1L)
712 return 0;
713 if (--chip->num_suspended_intf)
714 return 0;
Takashi Iwai1ee23fe2014-05-02 18:17:06 +0200715
716 chip->in_pm = 1;
Daniel Macke5779992010-03-04 19:46:13 +0100717 /*
718 * ALSA leaves material resumption to user space
Oliver Neukumedf7de32011-03-11 13:19:43 +0100719 * we just notify and restart the mixers
Daniel Macke5779992010-03-04 19:46:13 +0100720 */
Oliver Neukum88a85162011-03-11 14:51:12 +0100721 list_for_each_entry(mixer, &chip->mixer_list, list) {
Takashi Iwai400362f2014-01-20 16:51:16 +0100722 err = snd_usb_mixer_resume(mixer, reset_resume);
Oliver Neukum88a85162011-03-11 14:51:12 +0100723 if (err < 0)
724 goto err_out;
725 }
Daniel Macke5779992010-03-04 19:46:13 +0100726
Oliver Neukum88a85162011-03-11 14:51:12 +0100727 if (!chip->autosuspended)
728 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
729 chip->autosuspended = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100730
Oliver Neukum88a85162011-03-11 14:51:12 +0100731err_out:
Takashi Iwai1ee23fe2014-05-02 18:17:06 +0200732 chip->in_pm = 0;
Oliver Neukum88a85162011-03-11 14:51:12 +0100733 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100734}
Takashi Iwai400362f2014-01-20 16:51:16 +0100735
736static int usb_audio_resume(struct usb_interface *intf)
737{
738 return __usb_audio_resume(intf, false);
739}
740
741static int usb_audio_reset_resume(struct usb_interface *intf)
742{
743 return __usb_audio_resume(intf, true);
744}
Randy Dunlap6407d472010-03-22 08:55:35 -0700745#else
746#define usb_audio_suspend NULL
747#define usb_audio_resume NULL
Takashi Iwai400362f2014-01-20 16:51:16 +0100748#define usb_audio_reset_resume NULL
Daniel Macke5779992010-03-04 19:46:13 +0100749#endif /* CONFIG_PM */
750
751static struct usb_device_id usb_audio_ids [] = {
752#include "quirks-table.h"
753 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
754 .bInterfaceClass = USB_CLASS_AUDIO,
755 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
756 { } /* Terminating entry */
757};
Eldad Zackf9d35432013-04-03 23:18:50 +0200758MODULE_DEVICE_TABLE(usb, usb_audio_ids);
Daniel Macke5779992010-03-04 19:46:13 +0100759
760/*
761 * entry point for linux usb interface
762 */
763
764static struct usb_driver usb_audio_driver = {
765 .name = "snd-usb-audio",
766 .probe = usb_audio_probe,
767 .disconnect = usb_audio_disconnect,
768 .suspend = usb_audio_suspend,
769 .resume = usb_audio_resume,
Takashi Iwai400362f2014-01-20 16:51:16 +0100770 .reset_resume = usb_audio_reset_resume,
Daniel Macke5779992010-03-04 19:46:13 +0100771 .id_table = usb_audio_ids,
Oliver Neukum88a85162011-03-11 14:51:12 +0100772 .supports_autosuspend = 1,
Daniel Macke5779992010-03-04 19:46:13 +0100773};
774
Sachin Kamat6b5a7c62013-10-09 17:22:32 +0530775module_usb_driver(usb_audio_driver);