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e5779998 DM |
1 | /* |
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 | * | |
e5779998 DM |
28 | * - 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> | |
3ffc1222 | 41 | #include <linux/ctype.h> |
e5779998 DM |
42 | #include <linux/usb.h> |
43 | #include <linux/moduleparam.h> | |
44 | #include <linux/mutex.h> | |
45 | #include <linux/usb/audio.h> | |
7e847894 | 46 | #include <linux/usb/audio-v2.h> |
da155d5b | 47 | #include <linux/module.h> |
e5779998 | 48 | |
9e38658f | 49 | #include <sound/control.h> |
e5779998 DM |
50 | #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" | |
f0b5e634 | 59 | #include "mixer.h" |
e5779998 DM |
60 | #include "proc.h" |
61 | #include "quirks.h" | |
62 | #include "endpoint.h" | |
63 | #include "helper.h" | |
64 | #include "debug.h" | |
65 | #include "pcm.h" | |
e5779998 | 66 | #include "format.h" |
88a8516a | 67 | #include "power.h" |
e8e8babf | 68 | #include "stream.h" |
e5779998 DM |
69 | |
70 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); | |
71 | MODULE_DESCRIPTION("USB Audio"); | |
72 | MODULE_LICENSE("GPL"); | |
73 | MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}"); | |
74 | ||
75 | ||
76 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
77 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
a67ff6a5 | 78 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ |
e5779998 DM |
79 | /* Vendor/product IDs for this card */ |
80 | static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; | |
81 | static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; | |
e5779998 | 82 | static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ |
a67ff6a5 | 83 | static bool ignore_ctl_error; |
ef02e29b | 84 | static bool autoclock = true; |
e2703363 | 85 | static char *quirk_alias[SNDRV_CARDS]; |
e5779998 DM |
86 | |
87 | module_param_array(index, int, NULL, 0444); | |
88 | MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); | |
89 | module_param_array(id, charp, NULL, 0444); | |
90 | MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); | |
91 | module_param_array(enable, bool, NULL, 0444); | |
92 | MODULE_PARM_DESC(enable, "Enable USB audio adapter."); | |
93 | module_param_array(vid, int, NULL, 0444); | |
94 | MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); | |
95 | module_param_array(pid, int, NULL, 0444); | |
96 | MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); | |
e5779998 DM |
97 | module_param_array(device_setup, int, NULL, 0444); |
98 | MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); | |
99 | module_param(ignore_ctl_error, bool, 0444); | |
100 | MODULE_PARM_DESC(ignore_ctl_error, | |
101 | "Ignore errors from USB controller for mixer interfaces."); | |
ef02e29b EZ |
102 | module_param(autoclock, bool, 0444); |
103 | MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); | |
e2703363 TI |
104 | module_param_array(quirk_alias, charp, NULL, 0444); |
105 | MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef."); | |
e5779998 DM |
106 | |
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 | ||
112 | static DEFINE_MUTEX(register_mutex); | |
113 | static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; | |
114 | static struct usb_driver usb_audio_driver; | |
115 | ||
116 | /* | |
117 | * disconnect streams | |
4c8c3a4f | 118 | * called from usb_audio_disconnect() |
e5779998 | 119 | */ |
a6cece9d | 120 | static void snd_usb_stream_disconnect(struct snd_usb_stream *as) |
e5779998 DM |
121 | { |
122 | int idx; | |
e5779998 DM |
123 | struct snd_usb_substream *subs; |
124 | ||
e5779998 DM |
125 | for (idx = 0; idx < 2; idx++) { |
126 | subs = &as->substream[idx]; | |
127 | if (!subs->num_formats) | |
76195fb0 | 128 | continue; |
e5779998 | 129 | subs->interface = -1; |
edcd3633 DM |
130 | subs->data_endpoint = NULL; |
131 | subs->sync_endpoint = NULL; | |
e5779998 DM |
132 | } |
133 | } | |
134 | ||
135 | static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) | |
136 | { | |
137 | struct usb_device *dev = chip->dev; | |
138 | struct usb_host_interface *alts; | |
139 | struct usb_interface_descriptor *altsd; | |
140 | struct usb_interface *iface = usb_ifnum_to_if(dev, interface); | |
141 | ||
142 | if (!iface) { | |
0ba41d91 TI |
143 | dev_err(&dev->dev, "%u:%d : does not exist\n", |
144 | ctrlif, interface); | |
e5779998 DM |
145 | return -EINVAL; |
146 | } | |
147 | ||
342cda29 CL |
148 | alts = &iface->altsetting[0]; |
149 | altsd = get_iface_desc(alts); | |
150 | ||
151 | /* | |
152 | * Android with both accessory and audio interfaces enabled gets the | |
153 | * interface numbers wrong. | |
154 | */ | |
155 | if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || | |
156 | chip->usb_id == USB_ID(0x18d1, 0x2d05)) && | |
157 | interface == 0 && | |
158 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && | |
159 | altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { | |
160 | interface = 2; | |
161 | iface = usb_ifnum_to_if(dev, interface); | |
162 | if (!iface) | |
163 | return -EINVAL; | |
164 | alts = &iface->altsetting[0]; | |
165 | altsd = get_iface_desc(alts); | |
166 | } | |
167 | ||
e5779998 | 168 | if (usb_interface_claimed(iface)) { |
0ba41d91 TI |
169 | dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", |
170 | ctrlif, interface); | |
e5779998 DM |
171 | return -EINVAL; |
172 | } | |
173 | ||
e5779998 DM |
174 | if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || |
175 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && | |
176 | altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { | |
79289e24 TI |
177 | int err = __snd_usbmidi_create(chip->card, iface, |
178 | &chip->midi_list, NULL, | |
179 | chip->usb_id); | |
e5779998 | 180 | if (err < 0) { |
0ba41d91 TI |
181 | dev_err(&dev->dev, |
182 | "%u:%d: cannot create sequencer device\n", | |
183 | ctrlif, interface); | |
e5779998 DM |
184 | return -EINVAL; |
185 | } | |
186 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && | |
192 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || | |
193 | altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { | |
0ba41d91 TI |
194 | dev_dbg(&dev->dev, |
195 | "%u:%d: skipping non-supported interface %d\n", | |
196 | ctrlif, interface, altsd->bInterfaceClass); | |
e5779998 DM |
197 | /* skip non-supported classes */ |
198 | return -EINVAL; | |
199 | } | |
200 | ||
201 | if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { | |
0ba41d91 | 202 | dev_err(&dev->dev, "low speed audio streaming not supported\n"); |
e5779998 DM |
203 | return -EINVAL; |
204 | } | |
205 | ||
e8e8babf | 206 | if (! snd_usb_parse_audio_interface(chip, interface)) { |
e5779998 DM |
207 | usb_set_interface(dev, interface, 0); /* reset the current interface */ |
208 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
e5779998 DM |
209 | } |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | /* | |
215 | * parse audio control descriptor and create pcm/midi streams | |
216 | */ | |
217 | static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) | |
218 | { | |
219 | struct usb_device *dev = chip->dev; | |
220 | struct usb_host_interface *host_iface; | |
221 | struct usb_interface_descriptor *altsd; | |
222 | void *control_header; | |
223 | int i, protocol; | |
bfc81a8b | 224 | int rest_bytes; |
e5779998 DM |
225 | |
226 | /* find audiocontrol interface */ | |
227 | host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; | |
228 | control_header = snd_usb_find_csint_desc(host_iface->extra, | |
229 | host_iface->extralen, | |
230 | NULL, UAC_HEADER); | |
231 | altsd = get_iface_desc(host_iface); | |
232 | protocol = altsd->bInterfaceProtocol; | |
233 | ||
234 | if (!control_header) { | |
0ba41d91 | 235 | dev_err(&dev->dev, "cannot find UAC_HEADER\n"); |
e5779998 DM |
236 | return -EINVAL; |
237 | } | |
238 | ||
bfc81a8b TI |
239 | rest_bytes = (void *)(host_iface->extra + host_iface->extralen) - |
240 | control_header; | |
241 | ||
242 | /* just to be sure -- this shouldn't hit at all */ | |
243 | if (rest_bytes <= 0) { | |
244 | dev_err(&dev->dev, "invalid control header\n"); | |
245 | return -EINVAL; | |
246 | } | |
247 | ||
e5779998 | 248 | switch (protocol) { |
a2acad82 | 249 | default: |
0ba41d91 TI |
250 | dev_warn(&dev->dev, |
251 | "unknown interface protocol %#02x, assuming v1\n", | |
252 | protocol); | |
a2acad82 CL |
253 | /* fall through */ |
254 | ||
e5779998 | 255 | case UAC_VERSION_1: { |
69da9bcb | 256 | struct uac1_ac_header_descriptor *h1 = control_header; |
e5779998 | 257 | |
bfc81a8b TI |
258 | if (rest_bytes < sizeof(*h1)) { |
259 | dev_err(&dev->dev, "too short v1 buffer descriptor\n"); | |
260 | return -EINVAL; | |
261 | } | |
262 | ||
e5779998 | 263 | if (!h1->bInCollection) { |
0ba41d91 | 264 | dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); |
e5779998 DM |
265 | return -EINVAL; |
266 | } | |
267 | ||
bfc81a8b TI |
268 | if (rest_bytes < h1->bLength) { |
269 | dev_err(&dev->dev, "invalid buffer length (v1)\n"); | |
270 | return -EINVAL; | |
271 | } | |
272 | ||
e5779998 | 273 | if (h1->bLength < sizeof(*h1) + h1->bInCollection) { |
0ba41d91 | 274 | dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); |
e5779998 DM |
275 | return -EINVAL; |
276 | } | |
277 | ||
278 | for (i = 0; i < h1->bInCollection; i++) | |
279 | snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); | |
280 | ||
281 | break; | |
282 | } | |
283 | ||
284 | case UAC_VERSION_2: { | |
e5779998 DM |
285 | struct usb_interface_assoc_descriptor *assoc = |
286 | usb_ifnum_to_if(dev, ctrlif)->intf_assoc; | |
287 | ||
281a6ac0 CL |
288 | if (!assoc) { |
289 | /* | |
290 | * Firmware writers cannot count to three. So to find | |
291 | * the IAD on the NuForce UDH-100, also check the next | |
292 | * interface. | |
293 | */ | |
294 | struct usb_interface *iface = | |
295 | usb_ifnum_to_if(dev, ctrlif + 1); | |
296 | if (iface && | |
297 | iface->intf_assoc && | |
298 | iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && | |
299 | iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) | |
300 | assoc = iface->intf_assoc; | |
301 | } | |
302 | ||
e5779998 | 303 | if (!assoc) { |
0ba41d91 | 304 | dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n"); |
e5779998 DM |
305 | return -EINVAL; |
306 | } | |
307 | ||
e5779998 DM |
308 | for (i = 0; i < assoc->bInterfaceCount; i++) { |
309 | int intf = assoc->bFirstInterface + i; | |
310 | ||
311 | if (intf != ctrlif) | |
312 | snd_usb_create_stream(chip, ctrlif, intf); | |
313 | } | |
314 | ||
315 | break; | |
316 | } | |
e5779998 DM |
317 | } |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | /* | |
323 | * free the chip instance | |
324 | * | |
325 | * here we have to do not much, since pcm and controls are already freed | |
326 | * | |
327 | */ | |
328 | ||
329 | static int snd_usb_audio_free(struct snd_usb_audio *chip) | |
330 | { | |
a6cece9d | 331 | struct snd_usb_endpoint *ep, *n; |
92a586bd | 332 | |
a6cece9d TI |
333 | list_for_each_entry_safe(ep, n, &chip->ep_list, list) |
334 | snd_usb_endpoint_free(ep); | |
92a586bd | 335 | |
596580d0 | 336 | mutex_destroy(&chip->mutex); |
6ff1a253 TI |
337 | if (!atomic_read(&chip->shutdown)) |
338 | dev_set_drvdata(&chip->dev->dev, NULL); | |
e5779998 DM |
339 | kfree(chip); |
340 | return 0; | |
341 | } | |
342 | ||
343 | static int snd_usb_audio_dev_free(struct snd_device *device) | |
344 | { | |
345 | struct snd_usb_audio *chip = device->device_data; | |
346 | return snd_usb_audio_free(chip); | |
347 | } | |
348 | ||
7a65207a TI |
349 | static void usb_audio_make_shortname(struct usb_device *dev, |
350 | struct snd_usb_audio *chip, | |
351 | const struct snd_usb_audio_quirk *quirk) | |
352 | { | |
353 | struct snd_card *card = chip->card; | |
354 | ||
355 | if (quirk && quirk->product_name && *quirk->product_name) { | |
356 | strlcpy(card->shortname, quirk->product_name, | |
357 | sizeof(card->shortname)); | |
358 | return; | |
359 | } | |
360 | ||
361 | /* retrieve the device string as shortname */ | |
362 | if (!dev->descriptor.iProduct || | |
363 | usb_string(dev, dev->descriptor.iProduct, | |
364 | card->shortname, sizeof(card->shortname)) <= 0) { | |
365 | /* no name available from anywhere, so use ID */ | |
366 | sprintf(card->shortname, "USB Device %#04x:%#04x", | |
367 | USB_ID_VENDOR(chip->usb_id), | |
368 | USB_ID_PRODUCT(chip->usb_id)); | |
369 | } | |
370 | ||
371 | strim(card->shortname); | |
372 | } | |
373 | ||
374 | static void usb_audio_make_longname(struct usb_device *dev, | |
375 | struct snd_usb_audio *chip, | |
376 | const struct snd_usb_audio_quirk *quirk) | |
377 | { | |
378 | struct snd_card *card = chip->card; | |
379 | int len; | |
380 | ||
381 | /* shortcut - if any pre-defined string is given, use it */ | |
382 | if (quirk && quirk->profile_name && *quirk->profile_name) { | |
383 | strlcpy(card->longname, quirk->profile_name, | |
384 | sizeof(card->longname)); | |
385 | return; | |
386 | } | |
387 | ||
388 | if (quirk && quirk->vendor_name && *quirk->vendor_name) { | |
389 | len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); | |
390 | } else { | |
391 | /* retrieve the vendor and device strings as longname */ | |
392 | if (dev->descriptor.iManufacturer) | |
393 | len = usb_string(dev, dev->descriptor.iManufacturer, | |
394 | card->longname, sizeof(card->longname)); | |
395 | else | |
396 | len = 0; | |
397 | /* we don't really care if there isn't any vendor string */ | |
398 | } | |
399 | if (len > 0) { | |
400 | strim(card->longname); | |
401 | if (*card->longname) | |
402 | strlcat(card->longname, " ", sizeof(card->longname)); | |
403 | } | |
404 | ||
405 | strlcat(card->longname, card->shortname, sizeof(card->longname)); | |
406 | ||
407 | len = strlcat(card->longname, " at ", sizeof(card->longname)); | |
408 | ||
409 | if (len < sizeof(card->longname)) | |
410 | usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); | |
411 | ||
412 | switch (snd_usb_get_speed(dev)) { | |
413 | case USB_SPEED_LOW: | |
414 | strlcat(card->longname, ", low speed", sizeof(card->longname)); | |
415 | break; | |
416 | case USB_SPEED_FULL: | |
417 | strlcat(card->longname, ", full speed", sizeof(card->longname)); | |
418 | break; | |
419 | case USB_SPEED_HIGH: | |
420 | strlcat(card->longname, ", high speed", sizeof(card->longname)); | |
421 | break; | |
422 | case USB_SPEED_SUPER: | |
423 | strlcat(card->longname, ", super speed", sizeof(card->longname)); | |
424 | break; | |
425 | case USB_SPEED_SUPER_PLUS: | |
426 | strlcat(card->longname, ", super speed plus", sizeof(card->longname)); | |
427 | break; | |
428 | default: | |
429 | break; | |
430 | } | |
431 | } | |
432 | ||
e5779998 DM |
433 | /* |
434 | * create a chip instance and set its names. | |
435 | */ | |
874b8d42 TI |
436 | static int snd_usb_audio_create(struct usb_interface *intf, |
437 | struct usb_device *dev, int idx, | |
e5779998 | 438 | const struct snd_usb_audio_quirk *quirk, |
03a1f48e | 439 | unsigned int usb_id, |
e5779998 DM |
440 | struct snd_usb_audio **rchip) |
441 | { | |
442 | struct snd_card *card; | |
443 | struct snd_usb_audio *chip; | |
7a65207a | 444 | int err; |
e5779998 DM |
445 | char component[14]; |
446 | static struct snd_device_ops ops = { | |
447 | .dev_free = snd_usb_audio_dev_free, | |
448 | }; | |
449 | ||
450 | *rchip = NULL; | |
451 | ||
4f4e8f69 PZ |
452 | switch (snd_usb_get_speed(dev)) { |
453 | case USB_SPEED_LOW: | |
454 | case USB_SPEED_FULL: | |
455 | case USB_SPEED_HIGH: | |
df3774c5 | 456 | case USB_SPEED_WIRELESS: |
4f4e8f69 | 457 | case USB_SPEED_SUPER: |
748a1ccc | 458 | case USB_SPEED_SUPER_PLUS: |
4f4e8f69 PZ |
459 | break; |
460 | default: | |
0ba41d91 | 461 | dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); |
e5779998 DM |
462 | return -ENXIO; |
463 | } | |
464 | ||
874b8d42 TI |
465 | err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, |
466 | 0, &card); | |
e5779998 | 467 | if (err < 0) { |
0ba41d91 | 468 | dev_err(&dev->dev, "cannot create card instance %d\n", idx); |
e5779998 DM |
469 | return err; |
470 | } | |
471 | ||
472 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
473 | if (! chip) { | |
474 | snd_card_free(card); | |
475 | return -ENOMEM; | |
476 | } | |
477 | ||
596580d0 | 478 | mutex_init(&chip->mutex); |
47ab1545 | 479 | init_waitqueue_head(&chip->shutdown_wait); |
e5779998 DM |
480 | chip->index = idx; |
481 | chip->dev = dev; | |
482 | chip->card = card; | |
483 | chip->setup = device_setup[idx]; | |
ef02e29b | 484 | chip->autoclock = autoclock; |
a6da499b | 485 | atomic_set(&chip->active, 1); /* avoid autopm during probing */ |
47ab1545 TI |
486 | atomic_set(&chip->usage_count, 0); |
487 | atomic_set(&chip->shutdown, 0); | |
e5779998 | 488 | |
03a1f48e | 489 | chip->usb_id = usb_id; |
e5779998 | 490 | INIT_LIST_HEAD(&chip->pcm_list); |
edcd3633 | 491 | INIT_LIST_HEAD(&chip->ep_list); |
e5779998 DM |
492 | INIT_LIST_HEAD(&chip->midi_list); |
493 | INIT_LIST_HEAD(&chip->mixer_list); | |
494 | ||
495 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { | |
496 | snd_usb_audio_free(chip); | |
497 | snd_card_free(card); | |
498 | return err; | |
499 | } | |
500 | ||
501 | strcpy(card->driver, "USB-Audio"); | |
502 | sprintf(component, "USB%04x:%04x", | |
503 | USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); | |
504 | snd_component_add(card, component); | |
505 | ||
7a65207a TI |
506 | usb_audio_make_shortname(dev, chip, quirk); |
507 | usb_audio_make_longname(dev, chip, quirk); | |
e5779998 DM |
508 | |
509 | snd_usb_audio_create_proc(chip); | |
510 | ||
511 | *rchip = chip; | |
512 | return 0; | |
513 | } | |
514 | ||
e2703363 TI |
515 | /* look for a matching quirk alias id */ |
516 | static bool get_alias_id(struct usb_device *dev, unsigned int *id) | |
517 | { | |
518 | int i; | |
519 | unsigned int src, dst; | |
520 | ||
521 | for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { | |
522 | if (!quirk_alias[i] || | |
523 | sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || | |
524 | src != *id) | |
525 | continue; | |
526 | dev_info(&dev->dev, | |
527 | "device (%04x:%04x): applying quirk alias %04x:%04x\n", | |
528 | USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), | |
529 | USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); | |
530 | *id = dst; | |
531 | return true; | |
532 | } | |
533 | ||
534 | return false; | |
535 | } | |
536 | ||
8824ae2d | 537 | static const struct usb_device_id usb_audio_ids[]; /* defined below */ |
e2703363 TI |
538 | |
539 | /* look for the corresponding quirk */ | |
540 | static const struct snd_usb_audio_quirk * | |
541 | get_alias_quirk(struct usb_device *dev, unsigned int id) | |
542 | { | |
543 | const struct usb_device_id *p; | |
544 | ||
545 | for (p = usb_audio_ids; p->match_flags; p++) { | |
546 | /* FIXME: this checks only vendor:product pair in the list */ | |
547 | if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == | |
548 | USB_DEVICE_ID_MATCH_DEVICE && | |
549 | p->idVendor == USB_ID_VENDOR(id) && | |
550 | p->idProduct == USB_ID_PRODUCT(id)) | |
551 | return (const struct snd_usb_audio_quirk *)p->driver_info; | |
552 | } | |
553 | ||
554 | return NULL; | |
555 | } | |
556 | ||
e5779998 DM |
557 | /* |
558 | * probe the active usb device | |
559 | * | |
560 | * note that this can be called multiple times per a device, when it | |
561 | * includes multiple audio control interfaces. | |
562 | * | |
563 | * thus we check the usb device pointer and creates the card instance | |
564 | * only at the first time. the successive calls of this function will | |
565 | * append the pcm interface to the corresponding card. | |
566 | */ | |
4c8c3a4f TI |
567 | static int usb_audio_probe(struct usb_interface *intf, |
568 | const struct usb_device_id *usb_id) | |
e5779998 | 569 | { |
4c8c3a4f TI |
570 | struct usb_device *dev = interface_to_usbdev(intf); |
571 | const struct snd_usb_audio_quirk *quirk = | |
572 | (const struct snd_usb_audio_quirk *)usb_id->driver_info; | |
e5779998 | 573 | struct snd_usb_audio *chip; |
4c8c3a4f | 574 | int i, err; |
e5779998 DM |
575 | struct usb_host_interface *alts; |
576 | int ifnum; | |
577 | u32 id; | |
578 | ||
579 | alts = &intf->altsetting[0]; | |
580 | ifnum = get_iface_desc(alts)->bInterfaceNumber; | |
581 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
582 | le16_to_cpu(dev->descriptor.idProduct)); | |
e2703363 TI |
583 | if (get_alias_id(dev, &id)) |
584 | quirk = get_alias_quirk(dev, id); | |
e5779998 | 585 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) |
4c8c3a4f | 586 | return -ENXIO; |
e5779998 | 587 | |
79289e24 | 588 | err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); |
4c8c3a4f TI |
589 | if (err < 0) |
590 | return err; | |
e5779998 DM |
591 | |
592 | /* | |
593 | * found a config. now register to ALSA | |
594 | */ | |
595 | ||
596 | /* check whether it's already registered */ | |
597 | chip = NULL; | |
598 | mutex_lock(®ister_mutex); | |
599 | for (i = 0; i < SNDRV_CARDS; i++) { | |
600 | if (usb_chip[i] && usb_chip[i]->dev == dev) { | |
47ab1545 | 601 | if (atomic_read(&usb_chip[i]->shutdown)) { |
0ba41d91 | 602 | dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); |
4c8c3a4f | 603 | err = -EIO; |
e5779998 DM |
604 | goto __error; |
605 | } | |
606 | chip = usb_chip[i]; | |
a6da499b | 607 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
608 | break; |
609 | } | |
610 | } | |
611 | if (! chip) { | |
612 | /* it's a fresh one. | |
613 | * now look for an empty slot and create a new card instance | |
614 | */ | |
615 | for (i = 0; i < SNDRV_CARDS; i++) | |
616 | if (enable[i] && ! usb_chip[i] && | |
617 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && | |
618 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { | |
4c8c3a4f | 619 | err = snd_usb_audio_create(intf, dev, i, quirk, |
03a1f48e | 620 | id, &chip); |
4c8c3a4f | 621 | if (err < 0) |
e5779998 | 622 | goto __error; |
88a8516a | 623 | chip->pm_intf = intf; |
e5779998 DM |
624 | break; |
625 | } | |
626 | if (!chip) { | |
0ba41d91 | 627 | dev_err(&dev->dev, "no available usb audio device\n"); |
4c8c3a4f | 628 | err = -ENODEV; |
e5779998 DM |
629 | goto __error; |
630 | } | |
631 | } | |
76df5296 | 632 | dev_set_drvdata(&dev->dev, chip); |
e5779998 | 633 | |
7b6717e1 DM |
634 | /* |
635 | * For devices with more than one control interface, we assume the | |
636 | * first contains the audio controls. We might need a more specific | |
637 | * check here in the future. | |
638 | */ | |
639 | if (!chip->ctrl_intf) | |
640 | chip->ctrl_intf = alts; | |
79f920fb | 641 | |
5875c2cb DM |
642 | chip->txfr_quirk = 0; |
643 | err = 1; /* continue */ | |
644 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { | |
645 | /* need some special handlings */ | |
4c8c3a4f TI |
646 | err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); |
647 | if (err < 0) | |
5875c2cb DM |
648 | goto __error; |
649 | } | |
650 | ||
e5779998 DM |
651 | if (err > 0) { |
652 | /* create normal USB audio interfaces */ | |
4c8c3a4f TI |
653 | err = snd_usb_create_streams(chip, ifnum); |
654 | if (err < 0) | |
655 | goto __error; | |
656 | err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error); | |
657 | if (err < 0) | |
e5779998 | 658 | goto __error; |
e5779998 DM |
659 | } |
660 | ||
661 | /* we are allowed to call snd_card_register() many times */ | |
4c8c3a4f TI |
662 | err = snd_card_register(chip->card); |
663 | if (err < 0) | |
e5779998 | 664 | goto __error; |
e5779998 DM |
665 | |
666 | usb_chip[chip->index] = chip; | |
667 | chip->num_interfaces++; | |
4c8c3a4f | 668 | usb_set_intfdata(intf, chip); |
a6da499b | 669 | atomic_dec(&chip->active); |
e5779998 | 670 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 671 | return 0; |
e5779998 DM |
672 | |
673 | __error: | |
61a6a108 | 674 | if (chip) { |
1e107782 HP |
675 | /* chip->active is inside the chip->card object, |
676 | * decrement before memory is possibly returned. | |
677 | */ | |
678 | atomic_dec(&chip->active); | |
61a6a108 TP |
679 | if (!chip->num_interfaces) |
680 | snd_card_free(chip->card); | |
61a6a108 | 681 | } |
e5779998 | 682 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 683 | return err; |
e5779998 DM |
684 | } |
685 | ||
686 | /* | |
687 | * we need to take care of counter, since disconnection can be called also | |
688 | * many times as well as usb_audio_probe(). | |
689 | */ | |
4c8c3a4f | 690 | static void usb_audio_disconnect(struct usb_interface *intf) |
e5779998 | 691 | { |
4c8c3a4f | 692 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
e5779998 | 693 | struct snd_card *card; |
92a586bd | 694 | struct list_head *p; |
e5779998 | 695 | |
81b85b6b | 696 | if (chip == (void *)-1L) |
e5779998 DM |
697 | return; |
698 | ||
e5779998 | 699 | card = chip->card; |
10e44239 TI |
700 | |
701 | mutex_lock(®ister_mutex); | |
47ab1545 | 702 | if (atomic_inc_return(&chip->shutdown) == 1) { |
a6cece9d | 703 | struct snd_usb_stream *as; |
92a586bd | 704 | struct snd_usb_endpoint *ep; |
a6cece9d | 705 | struct usb_mixer_interface *mixer; |
92a586bd | 706 | |
47ab1545 TI |
707 | /* wait until all pending tasks done; |
708 | * they are protected by snd_usb_lock_shutdown() | |
709 | */ | |
710 | wait_event(chip->shutdown_wait, | |
711 | !atomic_read(&chip->usage_count)); | |
e5779998 DM |
712 | snd_card_disconnect(card); |
713 | /* release the pcm resources */ | |
a6cece9d TI |
714 | list_for_each_entry(as, &chip->pcm_list, list) { |
715 | snd_usb_stream_disconnect(as); | |
e5779998 | 716 | } |
edcd3633 | 717 | /* release the endpoint resources */ |
92a586bd TI |
718 | list_for_each_entry(ep, &chip->ep_list, list) { |
719 | snd_usb_endpoint_release(ep); | |
edcd3633 | 720 | } |
e5779998 DM |
721 | /* release the midi resources */ |
722 | list_for_each(p, &chip->midi_list) { | |
723 | snd_usbmidi_disconnect(p); | |
724 | } | |
725 | /* release mixer resources */ | |
a6cece9d TI |
726 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
727 | snd_usb_mixer_disconnect(mixer); | |
e5779998 | 728 | } |
0725dda2 TI |
729 | } |
730 | ||
731 | chip->num_interfaces--; | |
732 | if (chip->num_interfaces <= 0) { | |
e5779998 DM |
733 | usb_chip[chip->index] = NULL; |
734 | mutex_unlock(®ister_mutex); | |
735 | snd_card_free_when_closed(card); | |
736 | } else { | |
737 | mutex_unlock(®ister_mutex); | |
738 | } | |
739 | } | |
740 | ||
47ab1545 TI |
741 | /* lock the shutdown (disconnect) task and autoresume */ |
742 | int snd_usb_lock_shutdown(struct snd_usb_audio *chip) | |
88a8516a | 743 | { |
47ab1545 | 744 | int err; |
88a8516a | 745 | |
47ab1545 TI |
746 | atomic_inc(&chip->usage_count); |
747 | if (atomic_read(&chip->shutdown)) { | |
748 | err = -EIO; | |
749 | goto error; | |
750 | } | |
751 | err = snd_usb_autoresume(chip); | |
752 | if (err < 0) | |
753 | goto error; | |
754 | return 0; | |
88a8516a | 755 | |
47ab1545 TI |
756 | error: |
757 | if (atomic_dec_and_test(&chip->usage_count)) | |
758 | wake_up(&chip->shutdown_wait); | |
88a8516a ON |
759 | return err; |
760 | } | |
761 | ||
47ab1545 TI |
762 | /* autosuspend and unlock the shutdown */ |
763 | void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) | |
764 | { | |
765 | snd_usb_autosuspend(chip); | |
766 | if (atomic_dec_and_test(&chip->usage_count)) | |
767 | wake_up(&chip->shutdown_wait); | |
768 | } | |
769 | ||
770 | #ifdef CONFIG_PM | |
771 | ||
772 | int snd_usb_autoresume(struct snd_usb_audio *chip) | |
773 | { | |
774 | if (atomic_read(&chip->shutdown)) | |
775 | return -EIO; | |
47ab1545 TI |
776 | if (atomic_inc_return(&chip->active) == 1) |
777 | return usb_autopm_get_interface(chip->pm_intf); | |
778 | return 0; | |
779 | } | |
780 | ||
88a8516a ON |
781 | void snd_usb_autosuspend(struct snd_usb_audio *chip) |
782 | { | |
5c06d68b TI |
783 | if (atomic_read(&chip->shutdown)) |
784 | return; | |
47ab1545 | 785 | if (atomic_dec_and_test(&chip->active)) |
88a8516a ON |
786 | usb_autopm_put_interface(chip->pm_intf); |
787 | } | |
788 | ||
e5779998 DM |
789 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
790 | { | |
791 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
e5779998 | 792 | struct snd_usb_stream *as; |
edf7de31 | 793 | struct usb_mixer_interface *mixer; |
f7881e5e | 794 | struct list_head *p; |
e5779998 DM |
795 | |
796 | if (chip == (void *)-1L) | |
797 | return 0; | |
798 | ||
0662292a TI |
799 | chip->autosuspended = !!PMSG_IS_AUTO(message); |
800 | if (!chip->autosuspended) | |
88a8516a | 801 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); |
0662292a TI |
802 | if (!chip->num_suspended_intf++) { |
803 | list_for_each_entry(as, &chip->pcm_list, list) { | |
804 | snd_pcm_suspend_all(as->pcm); | |
805 | as->substream[0].need_setup_ep = | |
806 | as->substream[1].need_setup_ep = true; | |
aa53f986 | 807 | } |
0662292a TI |
808 | list_for_each(p, &chip->midi_list) |
809 | snd_usbmidi_suspend(p); | |
1c53e725 TI |
810 | list_for_each_entry(mixer, &chip->mixer_list, list) |
811 | snd_usb_mixer_suspend(mixer); | |
0662292a | 812 | } |
88a8516a | 813 | |
e5779998 DM |
814 | return 0; |
815 | } | |
816 | ||
400362f1 | 817 | static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) |
e5779998 DM |
818 | { |
819 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
edf7de31 | 820 | struct usb_mixer_interface *mixer; |
f7881e5e | 821 | struct list_head *p; |
88a8516a | 822 | int err = 0; |
e5779998 DM |
823 | |
824 | if (chip == (void *)-1L) | |
825 | return 0; | |
826 | if (--chip->num_suspended_intf) | |
827 | return 0; | |
1ee23fe0 | 828 | |
47ab1545 | 829 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
830 | /* |
831 | * ALSA leaves material resumption to user space | |
edf7de31 | 832 | * we just notify and restart the mixers |
e5779998 | 833 | */ |
88a8516a | 834 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
400362f1 | 835 | err = snd_usb_mixer_resume(mixer, reset_resume); |
88a8516a ON |
836 | if (err < 0) |
837 | goto err_out; | |
838 | } | |
e5779998 | 839 | |
f7881e5e AG |
840 | list_for_each(p, &chip->midi_list) { |
841 | snd_usbmidi_resume(p); | |
842 | } | |
843 | ||
88a8516a ON |
844 | if (!chip->autosuspended) |
845 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); | |
846 | chip->autosuspended = 0; | |
e5779998 | 847 | |
88a8516a | 848 | err_out: |
47ab1545 | 849 | atomic_dec(&chip->active); /* allow autopm after this point */ |
88a8516a | 850 | return err; |
e5779998 | 851 | } |
400362f1 TI |
852 | |
853 | static int usb_audio_resume(struct usb_interface *intf) | |
854 | { | |
855 | return __usb_audio_resume(intf, false); | |
856 | } | |
857 | ||
858 | static int usb_audio_reset_resume(struct usb_interface *intf) | |
859 | { | |
860 | return __usb_audio_resume(intf, true); | |
861 | } | |
6407d474 RD |
862 | #else |
863 | #define usb_audio_suspend NULL | |
864 | #define usb_audio_resume NULL | |
400362f1 | 865 | #define usb_audio_reset_resume NULL |
e5779998 DM |
866 | #endif /* CONFIG_PM */ |
867 | ||
8824ae2d | 868 | static const struct usb_device_id usb_audio_ids [] = { |
e5779998 DM |
869 | #include "quirks-table.h" |
870 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), | |
871 | .bInterfaceClass = USB_CLASS_AUDIO, | |
872 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, | |
873 | { } /* Terminating entry */ | |
874 | }; | |
f9d35435 | 875 | MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
e5779998 DM |
876 | |
877 | /* | |
878 | * entry point for linux usb interface | |
879 | */ | |
880 | ||
881 | static struct usb_driver usb_audio_driver = { | |
882 | .name = "snd-usb-audio", | |
883 | .probe = usb_audio_probe, | |
884 | .disconnect = usb_audio_disconnect, | |
885 | .suspend = usb_audio_suspend, | |
886 | .resume = usb_audio_resume, | |
400362f1 | 887 | .reset_resume = usb_audio_reset_resume, |
e5779998 | 888 | .id_table = usb_audio_ids, |
88a8516a | 889 | .supports_autosuspend = 1, |
e5779998 DM |
890 | }; |
891 | ||
6b5a7c66 | 892 | module_usb_driver(usb_audio_driver); |