Commit | Line | Data |
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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" |
aebb2b89 | 69 | #include "media.h" |
e5779998 DM |
70 | |
71 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); | |
72 | MODULE_DESCRIPTION("USB Audio"); | |
73 | MODULE_LICENSE("GPL"); | |
74 | MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}"); | |
75 | ||
76 | ||
77 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
78 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
a67ff6a5 | 79 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ |
e5779998 DM |
80 | /* Vendor/product IDs for this card */ |
81 | static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; | |
82 | static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; | |
e5779998 | 83 | static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ |
a67ff6a5 | 84 | static bool ignore_ctl_error; |
ef02e29b | 85 | static bool autoclock = true; |
e2703363 | 86 | static char *quirk_alias[SNDRV_CARDS]; |
e5779998 DM |
87 | |
88 | module_param_array(index, int, NULL, 0444); | |
89 | MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); | |
90 | module_param_array(id, charp, NULL, 0444); | |
91 | MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); | |
92 | module_param_array(enable, bool, NULL, 0444); | |
93 | MODULE_PARM_DESC(enable, "Enable USB audio adapter."); | |
94 | module_param_array(vid, int, NULL, 0444); | |
95 | MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); | |
96 | module_param_array(pid, int, NULL, 0444); | |
97 | MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); | |
e5779998 DM |
98 | module_param_array(device_setup, int, NULL, 0444); |
99 | MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); | |
100 | module_param(ignore_ctl_error, bool, 0444); | |
101 | MODULE_PARM_DESC(ignore_ctl_error, | |
102 | "Ignore errors from USB controller for mixer interfaces."); | |
ef02e29b EZ |
103 | module_param(autoclock, bool, 0444); |
104 | MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); | |
e2703363 TI |
105 | module_param_array(quirk_alias, charp, NULL, 0444); |
106 | MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef."); | |
e5779998 DM |
107 | |
108 | /* | |
109 | * we keep the snd_usb_audio_t instances by ourselves for merging | |
110 | * the all interfaces on the same card as one sound device. | |
111 | */ | |
112 | ||
113 | static DEFINE_MUTEX(register_mutex); | |
114 | static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; | |
115 | static struct usb_driver usb_audio_driver; | |
116 | ||
117 | /* | |
118 | * disconnect streams | |
4c8c3a4f | 119 | * called from usb_audio_disconnect() |
e5779998 | 120 | */ |
a6cece9d | 121 | static void snd_usb_stream_disconnect(struct snd_usb_stream *as) |
e5779998 DM |
122 | { |
123 | int idx; | |
e5779998 DM |
124 | struct snd_usb_substream *subs; |
125 | ||
e5779998 DM |
126 | for (idx = 0; idx < 2; idx++) { |
127 | subs = &as->substream[idx]; | |
128 | if (!subs->num_formats) | |
76195fb0 | 129 | continue; |
e5779998 | 130 | subs->interface = -1; |
edcd3633 DM |
131 | subs->data_endpoint = NULL; |
132 | subs->sync_endpoint = NULL; | |
e5779998 DM |
133 | } |
134 | } | |
135 | ||
136 | static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) | |
137 | { | |
138 | struct usb_device *dev = chip->dev; | |
139 | struct usb_host_interface *alts; | |
140 | struct usb_interface_descriptor *altsd; | |
141 | struct usb_interface *iface = usb_ifnum_to_if(dev, interface); | |
142 | ||
143 | if (!iface) { | |
0ba41d91 TI |
144 | dev_err(&dev->dev, "%u:%d : does not exist\n", |
145 | ctrlif, interface); | |
e5779998 DM |
146 | return -EINVAL; |
147 | } | |
148 | ||
342cda29 CL |
149 | alts = &iface->altsetting[0]; |
150 | altsd = get_iface_desc(alts); | |
151 | ||
152 | /* | |
153 | * Android with both accessory and audio interfaces enabled gets the | |
154 | * interface numbers wrong. | |
155 | */ | |
156 | if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || | |
157 | chip->usb_id == USB_ID(0x18d1, 0x2d05)) && | |
158 | interface == 0 && | |
159 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && | |
160 | altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { | |
161 | interface = 2; | |
162 | iface = usb_ifnum_to_if(dev, interface); | |
163 | if (!iface) | |
164 | return -EINVAL; | |
165 | alts = &iface->altsetting[0]; | |
166 | altsd = get_iface_desc(alts); | |
167 | } | |
168 | ||
e5779998 | 169 | if (usb_interface_claimed(iface)) { |
0ba41d91 TI |
170 | dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", |
171 | ctrlif, interface); | |
e5779998 DM |
172 | return -EINVAL; |
173 | } | |
174 | ||
e5779998 DM |
175 | if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || |
176 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && | |
177 | altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { | |
79289e24 TI |
178 | int err = __snd_usbmidi_create(chip->card, iface, |
179 | &chip->midi_list, NULL, | |
180 | chip->usb_id); | |
e5779998 | 181 | if (err < 0) { |
0ba41d91 TI |
182 | dev_err(&dev->dev, |
183 | "%u:%d: cannot create sequencer device\n", | |
184 | ctrlif, interface); | |
e5779998 DM |
185 | return -EINVAL; |
186 | } | |
187 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && | |
193 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || | |
194 | altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { | |
0ba41d91 TI |
195 | dev_dbg(&dev->dev, |
196 | "%u:%d: skipping non-supported interface %d\n", | |
197 | ctrlif, interface, altsd->bInterfaceClass); | |
e5779998 DM |
198 | /* skip non-supported classes */ |
199 | return -EINVAL; | |
200 | } | |
201 | ||
202 | if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { | |
0ba41d91 | 203 | dev_err(&dev->dev, "low speed audio streaming not supported\n"); |
e5779998 DM |
204 | return -EINVAL; |
205 | } | |
206 | ||
e8e8babf | 207 | if (! snd_usb_parse_audio_interface(chip, interface)) { |
e5779998 DM |
208 | usb_set_interface(dev, interface, 0); /* reset the current interface */ |
209 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
210 | return -EINVAL; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | /* | |
217 | * parse audio control descriptor and create pcm/midi streams | |
218 | */ | |
219 | static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) | |
220 | { | |
221 | struct usb_device *dev = chip->dev; | |
222 | struct usb_host_interface *host_iface; | |
223 | struct usb_interface_descriptor *altsd; | |
224 | void *control_header; | |
225 | int i, protocol; | |
226 | ||
227 | /* find audiocontrol interface */ | |
228 | host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; | |
229 | control_header = snd_usb_find_csint_desc(host_iface->extra, | |
230 | host_iface->extralen, | |
231 | NULL, UAC_HEADER); | |
232 | altsd = get_iface_desc(host_iface); | |
233 | protocol = altsd->bInterfaceProtocol; | |
234 | ||
235 | if (!control_header) { | |
0ba41d91 | 236 | dev_err(&dev->dev, "cannot find UAC_HEADER\n"); |
e5779998 DM |
237 | return -EINVAL; |
238 | } | |
239 | ||
240 | switch (protocol) { | |
a2acad82 | 241 | default: |
0ba41d91 TI |
242 | dev_warn(&dev->dev, |
243 | "unknown interface protocol %#02x, assuming v1\n", | |
244 | protocol); | |
a2acad82 CL |
245 | /* fall through */ |
246 | ||
e5779998 | 247 | case UAC_VERSION_1: { |
69da9bcb | 248 | struct uac1_ac_header_descriptor *h1 = control_header; |
e5779998 DM |
249 | |
250 | if (!h1->bInCollection) { | |
0ba41d91 | 251 | dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); |
e5779998 DM |
252 | return -EINVAL; |
253 | } | |
254 | ||
255 | if (h1->bLength < sizeof(*h1) + h1->bInCollection) { | |
0ba41d91 | 256 | dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); |
e5779998 DM |
257 | return -EINVAL; |
258 | } | |
259 | ||
260 | for (i = 0; i < h1->bInCollection; i++) | |
261 | snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); | |
262 | ||
263 | break; | |
264 | } | |
265 | ||
266 | case UAC_VERSION_2: { | |
e5779998 DM |
267 | struct usb_interface_assoc_descriptor *assoc = |
268 | usb_ifnum_to_if(dev, ctrlif)->intf_assoc; | |
269 | ||
281a6ac0 CL |
270 | if (!assoc) { |
271 | /* | |
272 | * Firmware writers cannot count to three. So to find | |
273 | * the IAD on the NuForce UDH-100, also check the next | |
274 | * interface. | |
275 | */ | |
276 | struct usb_interface *iface = | |
277 | usb_ifnum_to_if(dev, ctrlif + 1); | |
278 | if (iface && | |
279 | iface->intf_assoc && | |
280 | iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && | |
281 | iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) | |
282 | assoc = iface->intf_assoc; | |
283 | } | |
284 | ||
e5779998 | 285 | if (!assoc) { |
0ba41d91 | 286 | dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n"); |
e5779998 DM |
287 | return -EINVAL; |
288 | } | |
289 | ||
e5779998 DM |
290 | for (i = 0; i < assoc->bInterfaceCount; i++) { |
291 | int intf = assoc->bFirstInterface + i; | |
292 | ||
293 | if (intf != ctrlif) | |
294 | snd_usb_create_stream(chip, ctrlif, intf); | |
295 | } | |
296 | ||
297 | break; | |
298 | } | |
e5779998 DM |
299 | } |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | /* | |
305 | * free the chip instance | |
306 | * | |
307 | * here we have to do not much, since pcm and controls are already freed | |
308 | * | |
309 | */ | |
310 | ||
311 | static int snd_usb_audio_free(struct snd_usb_audio *chip) | |
312 | { | |
a6cece9d | 313 | struct snd_usb_endpoint *ep, *n; |
92a586bd | 314 | |
a6cece9d TI |
315 | list_for_each_entry_safe(ep, n, &chip->ep_list, list) |
316 | snd_usb_endpoint_free(ep); | |
92a586bd | 317 | |
596580d0 | 318 | mutex_destroy(&chip->mutex); |
79289e24 | 319 | dev_set_drvdata(&chip->dev->dev, NULL); |
e5779998 DM |
320 | kfree(chip); |
321 | return 0; | |
322 | } | |
323 | ||
324 | static int snd_usb_audio_dev_free(struct snd_device *device) | |
325 | { | |
326 | struct snd_usb_audio *chip = device->device_data; | |
327 | return snd_usb_audio_free(chip); | |
328 | } | |
329 | ||
e5779998 DM |
330 | /* |
331 | * create a chip instance and set its names. | |
332 | */ | |
874b8d42 TI |
333 | static int snd_usb_audio_create(struct usb_interface *intf, |
334 | struct usb_device *dev, int idx, | |
e5779998 DM |
335 | const struct snd_usb_audio_quirk *quirk, |
336 | struct snd_usb_audio **rchip) | |
337 | { | |
338 | struct snd_card *card; | |
339 | struct snd_usb_audio *chip; | |
340 | int err, len; | |
341 | char component[14]; | |
342 | static struct snd_device_ops ops = { | |
343 | .dev_free = snd_usb_audio_dev_free, | |
344 | }; | |
345 | ||
346 | *rchip = NULL; | |
347 | ||
4f4e8f69 PZ |
348 | switch (snd_usb_get_speed(dev)) { |
349 | case USB_SPEED_LOW: | |
350 | case USB_SPEED_FULL: | |
351 | case USB_SPEED_HIGH: | |
df3774c5 | 352 | case USB_SPEED_WIRELESS: |
4f4e8f69 PZ |
353 | case USB_SPEED_SUPER: |
354 | break; | |
355 | default: | |
0ba41d91 | 356 | dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); |
e5779998 DM |
357 | return -ENXIO; |
358 | } | |
359 | ||
874b8d42 TI |
360 | err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, |
361 | 0, &card); | |
e5779998 | 362 | if (err < 0) { |
0ba41d91 | 363 | dev_err(&dev->dev, "cannot create card instance %d\n", idx); |
e5779998 DM |
364 | return err; |
365 | } | |
366 | ||
367 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
368 | if (! chip) { | |
369 | snd_card_free(card); | |
370 | return -ENOMEM; | |
371 | } | |
372 | ||
596580d0 | 373 | mutex_init(&chip->mutex); |
47ab1545 | 374 | init_waitqueue_head(&chip->shutdown_wait); |
e5779998 DM |
375 | chip->index = idx; |
376 | chip->dev = dev; | |
377 | chip->card = card; | |
378 | chip->setup = device_setup[idx]; | |
ef02e29b | 379 | chip->autoclock = autoclock; |
a6da499b | 380 | atomic_set(&chip->active, 1); /* avoid autopm during probing */ |
47ab1545 TI |
381 | atomic_set(&chip->usage_count, 0); |
382 | atomic_set(&chip->shutdown, 0); | |
e5779998 DM |
383 | |
384 | chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
385 | le16_to_cpu(dev->descriptor.idProduct)); | |
386 | INIT_LIST_HEAD(&chip->pcm_list); | |
edcd3633 | 387 | INIT_LIST_HEAD(&chip->ep_list); |
e5779998 DM |
388 | INIT_LIST_HEAD(&chip->midi_list); |
389 | INIT_LIST_HEAD(&chip->mixer_list); | |
390 | ||
391 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { | |
392 | snd_usb_audio_free(chip); | |
393 | snd_card_free(card); | |
394 | return err; | |
395 | } | |
396 | ||
397 | strcpy(card->driver, "USB-Audio"); | |
398 | sprintf(component, "USB%04x:%04x", | |
399 | USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); | |
400 | snd_component_add(card, component); | |
401 | ||
402 | /* retrieve the device string as shortname */ | |
3ffc1222 | 403 | if (quirk && quirk->product_name && *quirk->product_name) { |
e5779998 DM |
404 | strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); |
405 | } else { | |
406 | if (!dev->descriptor.iProduct || | |
407 | usb_string(dev, dev->descriptor.iProduct, | |
408 | card->shortname, sizeof(card->shortname)) <= 0) { | |
409 | /* no name available from anywhere, so use ID */ | |
410 | sprintf(card->shortname, "USB Device %#04x:%#04x", | |
411 | USB_ID_VENDOR(chip->usb_id), | |
412 | USB_ID_PRODUCT(chip->usb_id)); | |
413 | } | |
414 | } | |
ae366c20 | 415 | strim(card->shortname); |
e5779998 DM |
416 | |
417 | /* retrieve the vendor and device strings as longname */ | |
3ffc1222 | 418 | if (quirk && quirk->vendor_name && *quirk->vendor_name) { |
e5779998 DM |
419 | len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); |
420 | } else { | |
421 | if (dev->descriptor.iManufacturer) | |
422 | len = usb_string(dev, dev->descriptor.iManufacturer, | |
423 | card->longname, sizeof(card->longname)); | |
424 | else | |
425 | len = 0; | |
426 | /* we don't really care if there isn't any vendor string */ | |
427 | } | |
3ffc1222 | 428 | if (len > 0) { |
ae366c20 | 429 | strim(card->longname); |
3ffc1222 TI |
430 | if (*card->longname) |
431 | strlcat(card->longname, " ", sizeof(card->longname)); | |
432 | } | |
e5779998 DM |
433 | |
434 | strlcat(card->longname, card->shortname, sizeof(card->longname)); | |
435 | ||
436 | len = strlcat(card->longname, " at ", sizeof(card->longname)); | |
437 | ||
438 | if (len < sizeof(card->longname)) | |
439 | usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); | |
440 | ||
4f4e8f69 PZ |
441 | switch (snd_usb_get_speed(dev)) { |
442 | case USB_SPEED_LOW: | |
443 | strlcat(card->longname, ", low speed", sizeof(card->longname)); | |
444 | break; | |
445 | case USB_SPEED_FULL: | |
446 | strlcat(card->longname, ", full speed", sizeof(card->longname)); | |
447 | break; | |
448 | case USB_SPEED_HIGH: | |
449 | strlcat(card->longname, ", high speed", sizeof(card->longname)); | |
450 | break; | |
451 | case USB_SPEED_SUPER: | |
452 | strlcat(card->longname, ", super speed", sizeof(card->longname)); | |
453 | break; | |
454 | default: | |
455 | break; | |
456 | } | |
e5779998 DM |
457 | |
458 | snd_usb_audio_create_proc(chip); | |
459 | ||
460 | *rchip = chip; | |
461 | return 0; | |
462 | } | |
463 | ||
e2703363 TI |
464 | /* look for a matching quirk alias id */ |
465 | static bool get_alias_id(struct usb_device *dev, unsigned int *id) | |
466 | { | |
467 | int i; | |
468 | unsigned int src, dst; | |
469 | ||
470 | for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { | |
471 | if (!quirk_alias[i] || | |
472 | sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || | |
473 | src != *id) | |
474 | continue; | |
475 | dev_info(&dev->dev, | |
476 | "device (%04x:%04x): applying quirk alias %04x:%04x\n", | |
477 | USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), | |
478 | USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); | |
479 | *id = dst; | |
480 | return true; | |
481 | } | |
482 | ||
483 | return false; | |
484 | } | |
485 | ||
486 | static struct usb_device_id usb_audio_ids[]; /* defined below */ | |
487 | ||
488 | /* look for the corresponding quirk */ | |
489 | static const struct snd_usb_audio_quirk * | |
490 | get_alias_quirk(struct usb_device *dev, unsigned int id) | |
491 | { | |
492 | const struct usb_device_id *p; | |
493 | ||
494 | for (p = usb_audio_ids; p->match_flags; p++) { | |
495 | /* FIXME: this checks only vendor:product pair in the list */ | |
496 | if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == | |
497 | USB_DEVICE_ID_MATCH_DEVICE && | |
498 | p->idVendor == USB_ID_VENDOR(id) && | |
499 | p->idProduct == USB_ID_PRODUCT(id)) | |
500 | return (const struct snd_usb_audio_quirk *)p->driver_info; | |
501 | } | |
502 | ||
503 | return NULL; | |
504 | } | |
505 | ||
e5779998 DM |
506 | /* |
507 | * probe the active usb device | |
508 | * | |
509 | * note that this can be called multiple times per a device, when it | |
510 | * includes multiple audio control interfaces. | |
511 | * | |
512 | * thus we check the usb device pointer and creates the card instance | |
513 | * only at the first time. the successive calls of this function will | |
514 | * append the pcm interface to the corresponding card. | |
515 | */ | |
4c8c3a4f TI |
516 | static int usb_audio_probe(struct usb_interface *intf, |
517 | const struct usb_device_id *usb_id) | |
e5779998 | 518 | { |
4c8c3a4f TI |
519 | struct usb_device *dev = interface_to_usbdev(intf); |
520 | const struct snd_usb_audio_quirk *quirk = | |
521 | (const struct snd_usb_audio_quirk *)usb_id->driver_info; | |
e5779998 | 522 | struct snd_usb_audio *chip; |
4c8c3a4f | 523 | int i, err; |
e5779998 DM |
524 | struct usb_host_interface *alts; |
525 | int ifnum; | |
526 | u32 id; | |
527 | ||
528 | alts = &intf->altsetting[0]; | |
529 | ifnum = get_iface_desc(alts)->bInterfaceNumber; | |
530 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
531 | le16_to_cpu(dev->descriptor.idProduct)); | |
e2703363 TI |
532 | if (get_alias_id(dev, &id)) |
533 | quirk = get_alias_quirk(dev, id); | |
e5779998 | 534 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) |
4c8c3a4f | 535 | return -ENXIO; |
e5779998 | 536 | |
79289e24 | 537 | err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); |
4c8c3a4f TI |
538 | if (err < 0) |
539 | return err; | |
e5779998 DM |
540 | |
541 | /* | |
542 | * found a config. now register to ALSA | |
543 | */ | |
544 | ||
545 | /* check whether it's already registered */ | |
546 | chip = NULL; | |
547 | mutex_lock(®ister_mutex); | |
548 | for (i = 0; i < SNDRV_CARDS; i++) { | |
549 | if (usb_chip[i] && usb_chip[i]->dev == dev) { | |
47ab1545 | 550 | if (atomic_read(&usb_chip[i]->shutdown)) { |
0ba41d91 | 551 | dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); |
4c8c3a4f | 552 | err = -EIO; |
e5779998 DM |
553 | goto __error; |
554 | } | |
555 | chip = usb_chip[i]; | |
79289e24 | 556 | dev_set_drvdata(&dev->dev, chip); |
a6da499b | 557 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
558 | break; |
559 | } | |
560 | } | |
561 | if (! chip) { | |
562 | /* it's a fresh one. | |
563 | * now look for an empty slot and create a new card instance | |
564 | */ | |
565 | for (i = 0; i < SNDRV_CARDS; i++) | |
566 | if (enable[i] && ! usb_chip[i] && | |
567 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && | |
568 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { | |
4c8c3a4f TI |
569 | err = snd_usb_audio_create(intf, dev, i, quirk, |
570 | &chip); | |
571 | if (err < 0) | |
e5779998 | 572 | goto __error; |
88a8516a | 573 | chip->pm_intf = intf; |
e5779998 DM |
574 | break; |
575 | } | |
576 | if (!chip) { | |
0ba41d91 | 577 | dev_err(&dev->dev, "no available usb audio device\n"); |
4c8c3a4f | 578 | err = -ENODEV; |
e5779998 DM |
579 | goto __error; |
580 | } | |
581 | } | |
582 | ||
7b6717e1 DM |
583 | /* |
584 | * For devices with more than one control interface, we assume the | |
585 | * first contains the audio controls. We might need a more specific | |
586 | * check here in the future. | |
587 | */ | |
588 | if (!chip->ctrl_intf) | |
589 | chip->ctrl_intf = alts; | |
79f920fb | 590 | |
5875c2cb DM |
591 | chip->txfr_quirk = 0; |
592 | err = 1; /* continue */ | |
593 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { | |
594 | /* need some special handlings */ | |
4c8c3a4f TI |
595 | err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); |
596 | if (err < 0) | |
5875c2cb DM |
597 | goto __error; |
598 | } | |
599 | ||
e5779998 DM |
600 | if (err > 0) { |
601 | /* create normal USB audio interfaces */ | |
4c8c3a4f TI |
602 | err = snd_usb_create_streams(chip, ifnum); |
603 | if (err < 0) | |
604 | goto __error; | |
605 | err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error); | |
606 | if (err < 0) | |
e5779998 | 607 | goto __error; |
e5779998 DM |
608 | } |
609 | ||
610 | /* we are allowed to call snd_card_register() many times */ | |
4c8c3a4f TI |
611 | err = snd_card_register(chip->card); |
612 | if (err < 0) | |
e5779998 | 613 | goto __error; |
e5779998 | 614 | |
aebb2b89 SK |
615 | if (quirk->media_device) { |
616 | /* don't want to fail when media_snd_device_create() fails */ | |
617 | media_snd_device_create(chip, intf); | |
618 | } | |
619 | ||
e5779998 DM |
620 | usb_chip[chip->index] = chip; |
621 | chip->num_interfaces++; | |
4c8c3a4f | 622 | usb_set_intfdata(intf, chip); |
a6da499b | 623 | atomic_dec(&chip->active); |
e5779998 | 624 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 625 | return 0; |
e5779998 DM |
626 | |
627 | __error: | |
61a6a108 TP |
628 | if (chip) { |
629 | if (!chip->num_interfaces) | |
630 | snd_card_free(chip->card); | |
a6da499b | 631 | atomic_dec(&chip->active); |
61a6a108 | 632 | } |
e5779998 | 633 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 634 | return err; |
e5779998 DM |
635 | } |
636 | ||
637 | /* | |
638 | * we need to take care of counter, since disconnection can be called also | |
639 | * many times as well as usb_audio_probe(). | |
640 | */ | |
4c8c3a4f | 641 | static void usb_audio_disconnect(struct usb_interface *intf) |
e5779998 | 642 | { |
4c8c3a4f | 643 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
e5779998 | 644 | struct snd_card *card; |
92a586bd | 645 | struct list_head *p; |
e5779998 | 646 | |
81b85b6b | 647 | if (chip == (void *)-1L) |
e5779998 DM |
648 | return; |
649 | ||
e5779998 | 650 | card = chip->card; |
10e44239 TI |
651 | |
652 | mutex_lock(®ister_mutex); | |
47ab1545 | 653 | if (atomic_inc_return(&chip->shutdown) == 1) { |
a6cece9d | 654 | struct snd_usb_stream *as; |
92a586bd | 655 | struct snd_usb_endpoint *ep; |
a6cece9d | 656 | struct usb_mixer_interface *mixer; |
92a586bd | 657 | |
47ab1545 TI |
658 | /* wait until all pending tasks done; |
659 | * they are protected by snd_usb_lock_shutdown() | |
660 | */ | |
661 | wait_event(chip->shutdown_wait, | |
662 | !atomic_read(&chip->usage_count)); | |
e5779998 DM |
663 | snd_card_disconnect(card); |
664 | /* release the pcm resources */ | |
a6cece9d TI |
665 | list_for_each_entry(as, &chip->pcm_list, list) { |
666 | snd_usb_stream_disconnect(as); | |
e5779998 | 667 | } |
edcd3633 | 668 | /* release the endpoint resources */ |
92a586bd TI |
669 | list_for_each_entry(ep, &chip->ep_list, list) { |
670 | snd_usb_endpoint_release(ep); | |
edcd3633 | 671 | } |
e5779998 DM |
672 | /* release the midi resources */ |
673 | list_for_each(p, &chip->midi_list) { | |
674 | snd_usbmidi_disconnect(p); | |
675 | } | |
aebb2b89 SK |
676 | /* |
677 | * Nice to check quirk && quirk->media_device | |
678 | * need some special handlings. Doesn't look like | |
679 | * we have access to quirk here | |
680 | * Acceses mixer_list | |
681 | */ | |
682 | media_snd_device_delete(chip); | |
683 | ||
e5779998 | 684 | /* release mixer resources */ |
a6cece9d TI |
685 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
686 | snd_usb_mixer_disconnect(mixer); | |
e5779998 | 687 | } |
0725dda2 TI |
688 | } |
689 | ||
690 | chip->num_interfaces--; | |
691 | if (chip->num_interfaces <= 0) { | |
e5779998 DM |
692 | usb_chip[chip->index] = NULL; |
693 | mutex_unlock(®ister_mutex); | |
694 | snd_card_free_when_closed(card); | |
695 | } else { | |
696 | mutex_unlock(®ister_mutex); | |
697 | } | |
698 | } | |
699 | ||
47ab1545 TI |
700 | /* lock the shutdown (disconnect) task and autoresume */ |
701 | int snd_usb_lock_shutdown(struct snd_usb_audio *chip) | |
88a8516a | 702 | { |
47ab1545 | 703 | int err; |
88a8516a | 704 | |
47ab1545 TI |
705 | atomic_inc(&chip->usage_count); |
706 | if (atomic_read(&chip->shutdown)) { | |
707 | err = -EIO; | |
708 | goto error; | |
709 | } | |
710 | err = snd_usb_autoresume(chip); | |
711 | if (err < 0) | |
712 | goto error; | |
713 | return 0; | |
88a8516a | 714 | |
47ab1545 TI |
715 | error: |
716 | if (atomic_dec_and_test(&chip->usage_count)) | |
717 | wake_up(&chip->shutdown_wait); | |
88a8516a ON |
718 | return err; |
719 | } | |
720 | ||
47ab1545 TI |
721 | /* autosuspend and unlock the shutdown */ |
722 | void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) | |
723 | { | |
724 | snd_usb_autosuspend(chip); | |
725 | if (atomic_dec_and_test(&chip->usage_count)) | |
726 | wake_up(&chip->shutdown_wait); | |
727 | } | |
728 | ||
729 | #ifdef CONFIG_PM | |
730 | ||
731 | int snd_usb_autoresume(struct snd_usb_audio *chip) | |
732 | { | |
733 | if (atomic_read(&chip->shutdown)) | |
734 | return -EIO; | |
47ab1545 TI |
735 | if (atomic_inc_return(&chip->active) == 1) |
736 | return usb_autopm_get_interface(chip->pm_intf); | |
737 | return 0; | |
738 | } | |
739 | ||
88a8516a ON |
740 | void snd_usb_autosuspend(struct snd_usb_audio *chip) |
741 | { | |
5c06d68b TI |
742 | if (atomic_read(&chip->shutdown)) |
743 | return; | |
47ab1545 | 744 | if (atomic_dec_and_test(&chip->active)) |
88a8516a ON |
745 | usb_autopm_put_interface(chip->pm_intf); |
746 | } | |
747 | ||
e5779998 DM |
748 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
749 | { | |
750 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
e5779998 | 751 | struct snd_usb_stream *as; |
edf7de31 | 752 | struct usb_mixer_interface *mixer; |
f7881e5e | 753 | struct list_head *p; |
e5779998 DM |
754 | |
755 | if (chip == (void *)-1L) | |
756 | return 0; | |
757 | ||
0662292a TI |
758 | chip->autosuspended = !!PMSG_IS_AUTO(message); |
759 | if (!chip->autosuspended) | |
88a8516a | 760 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); |
0662292a TI |
761 | if (!chip->num_suspended_intf++) { |
762 | list_for_each_entry(as, &chip->pcm_list, list) { | |
763 | snd_pcm_suspend_all(as->pcm); | |
764 | as->substream[0].need_setup_ep = | |
765 | as->substream[1].need_setup_ep = true; | |
aa53f986 | 766 | } |
0662292a TI |
767 | list_for_each(p, &chip->midi_list) |
768 | snd_usbmidi_suspend(p); | |
1c53e725 TI |
769 | list_for_each_entry(mixer, &chip->mixer_list, list) |
770 | snd_usb_mixer_suspend(mixer); | |
0662292a | 771 | } |
88a8516a | 772 | |
e5779998 DM |
773 | return 0; |
774 | } | |
775 | ||
400362f1 | 776 | static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) |
e5779998 DM |
777 | { |
778 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
edf7de31 | 779 | struct usb_mixer_interface *mixer; |
f7881e5e | 780 | struct list_head *p; |
88a8516a | 781 | int err = 0; |
e5779998 DM |
782 | |
783 | if (chip == (void *)-1L) | |
784 | return 0; | |
785 | if (--chip->num_suspended_intf) | |
786 | return 0; | |
1ee23fe0 | 787 | |
47ab1545 | 788 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
789 | /* |
790 | * ALSA leaves material resumption to user space | |
edf7de31 | 791 | * we just notify and restart the mixers |
e5779998 | 792 | */ |
88a8516a | 793 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
400362f1 | 794 | err = snd_usb_mixer_resume(mixer, reset_resume); |
88a8516a ON |
795 | if (err < 0) |
796 | goto err_out; | |
797 | } | |
e5779998 | 798 | |
f7881e5e AG |
799 | list_for_each(p, &chip->midi_list) { |
800 | snd_usbmidi_resume(p); | |
801 | } | |
802 | ||
88a8516a ON |
803 | if (!chip->autosuspended) |
804 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); | |
805 | chip->autosuspended = 0; | |
e5779998 | 806 | |
88a8516a | 807 | err_out: |
47ab1545 | 808 | atomic_dec(&chip->active); /* allow autopm after this point */ |
88a8516a | 809 | return err; |
e5779998 | 810 | } |
400362f1 TI |
811 | |
812 | static int usb_audio_resume(struct usb_interface *intf) | |
813 | { | |
814 | return __usb_audio_resume(intf, false); | |
815 | } | |
816 | ||
817 | static int usb_audio_reset_resume(struct usb_interface *intf) | |
818 | { | |
819 | return __usb_audio_resume(intf, true); | |
820 | } | |
6407d474 RD |
821 | #else |
822 | #define usb_audio_suspend NULL | |
823 | #define usb_audio_resume NULL | |
400362f1 | 824 | #define usb_audio_reset_resume NULL |
e5779998 DM |
825 | #endif /* CONFIG_PM */ |
826 | ||
827 | static struct usb_device_id usb_audio_ids [] = { | |
828 | #include "quirks-table.h" | |
829 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), | |
830 | .bInterfaceClass = USB_CLASS_AUDIO, | |
831 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, | |
832 | { } /* Terminating entry */ | |
833 | }; | |
f9d35435 | 834 | MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
e5779998 DM |
835 | |
836 | /* | |
837 | * entry point for linux usb interface | |
838 | */ | |
839 | ||
840 | static struct usb_driver usb_audio_driver = { | |
841 | .name = "snd-usb-audio", | |
842 | .probe = usb_audio_probe, | |
843 | .disconnect = usb_audio_disconnect, | |
844 | .suspend = usb_audio_suspend, | |
845 | .resume = usb_audio_resume, | |
400362f1 | 846 | .reset_resume = usb_audio_reset_resume, |
e5779998 | 847 | .id_table = usb_audio_ids, |
88a8516a | 848 | .supports_autosuspend = 1, |
e5779998 DM |
849 | }; |
850 | ||
6b5a7c66 | 851 | module_usb_driver(usb_audio_driver); |