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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); | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | /* | |
216 | * parse audio control descriptor and create pcm/midi streams | |
217 | */ | |
218 | static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) | |
219 | { | |
220 | struct usb_device *dev = chip->dev; | |
221 | struct usb_host_interface *host_iface; | |
222 | struct usb_interface_descriptor *altsd; | |
223 | void *control_header; | |
224 | int i, protocol; | |
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 | ||
239 | switch (protocol) { | |
a2acad82 | 240 | default: |
0ba41d91 TI |
241 | dev_warn(&dev->dev, |
242 | "unknown interface protocol %#02x, assuming v1\n", | |
243 | protocol); | |
a2acad82 CL |
244 | /* fall through */ |
245 | ||
e5779998 | 246 | case UAC_VERSION_1: { |
69da9bcb | 247 | struct uac1_ac_header_descriptor *h1 = control_header; |
e5779998 DM |
248 | |
249 | if (!h1->bInCollection) { | |
0ba41d91 | 250 | dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); |
e5779998 DM |
251 | return -EINVAL; |
252 | } | |
253 | ||
254 | if (h1->bLength < sizeof(*h1) + h1->bInCollection) { | |
0ba41d91 | 255 | dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); |
e5779998 DM |
256 | return -EINVAL; |
257 | } | |
258 | ||
259 | for (i = 0; i < h1->bInCollection; i++) | |
260 | snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); | |
261 | ||
262 | break; | |
263 | } | |
264 | ||
265 | case UAC_VERSION_2: { | |
e5779998 DM |
266 | struct usb_interface_assoc_descriptor *assoc = |
267 | usb_ifnum_to_if(dev, ctrlif)->intf_assoc; | |
268 | ||
281a6ac0 CL |
269 | if (!assoc) { |
270 | /* | |
271 | * Firmware writers cannot count to three. So to find | |
272 | * the IAD on the NuForce UDH-100, also check the next | |
273 | * interface. | |
274 | */ | |
275 | struct usb_interface *iface = | |
276 | usb_ifnum_to_if(dev, ctrlif + 1); | |
277 | if (iface && | |
278 | iface->intf_assoc && | |
279 | iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && | |
280 | iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) | |
281 | assoc = iface->intf_assoc; | |
282 | } | |
283 | ||
e5779998 | 284 | if (!assoc) { |
0ba41d91 | 285 | dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n"); |
e5779998 DM |
286 | return -EINVAL; |
287 | } | |
288 | ||
e5779998 DM |
289 | for (i = 0; i < assoc->bInterfaceCount; i++) { |
290 | int intf = assoc->bFirstInterface + i; | |
291 | ||
292 | if (intf != ctrlif) | |
293 | snd_usb_create_stream(chip, ctrlif, intf); | |
294 | } | |
295 | ||
296 | break; | |
297 | } | |
e5779998 DM |
298 | } |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | /* | |
304 | * free the chip instance | |
305 | * | |
306 | * here we have to do not much, since pcm and controls are already freed | |
307 | * | |
308 | */ | |
309 | ||
310 | static int snd_usb_audio_free(struct snd_usb_audio *chip) | |
311 | { | |
a6cece9d | 312 | struct snd_usb_endpoint *ep, *n; |
92a586bd | 313 | |
a6cece9d TI |
314 | list_for_each_entry_safe(ep, n, &chip->ep_list, list) |
315 | snd_usb_endpoint_free(ep); | |
92a586bd | 316 | |
596580d0 | 317 | mutex_destroy(&chip->mutex); |
79289e24 | 318 | dev_set_drvdata(&chip->dev->dev, NULL); |
e5779998 DM |
319 | kfree(chip); |
320 | return 0; | |
321 | } | |
322 | ||
323 | static int snd_usb_audio_dev_free(struct snd_device *device) | |
324 | { | |
325 | struct snd_usb_audio *chip = device->device_data; | |
326 | return snd_usb_audio_free(chip); | |
327 | } | |
328 | ||
e5779998 DM |
329 | /* |
330 | * create a chip instance and set its names. | |
331 | */ | |
874b8d42 TI |
332 | static int snd_usb_audio_create(struct usb_interface *intf, |
333 | struct usb_device *dev, int idx, | |
e5779998 DM |
334 | const struct snd_usb_audio_quirk *quirk, |
335 | struct snd_usb_audio **rchip) | |
336 | { | |
337 | struct snd_card *card; | |
338 | struct snd_usb_audio *chip; | |
339 | int err, len; | |
340 | char component[14]; | |
341 | static struct snd_device_ops ops = { | |
342 | .dev_free = snd_usb_audio_dev_free, | |
343 | }; | |
344 | ||
345 | *rchip = NULL; | |
346 | ||
4f4e8f69 PZ |
347 | switch (snd_usb_get_speed(dev)) { |
348 | case USB_SPEED_LOW: | |
349 | case USB_SPEED_FULL: | |
350 | case USB_SPEED_HIGH: | |
df3774c5 | 351 | case USB_SPEED_WIRELESS: |
4f4e8f69 | 352 | case USB_SPEED_SUPER: |
748a1ccc | 353 | case USB_SPEED_SUPER_PLUS: |
4f4e8f69 PZ |
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; | |
748a1ccc ON |
454 | case USB_SPEED_SUPER_PLUS: |
455 | strlcat(card->longname, ", super speed plus", sizeof(card->longname)); | |
456 | break; | |
4f4e8f69 PZ |
457 | default: |
458 | break; | |
459 | } | |
e5779998 DM |
460 | |
461 | snd_usb_audio_create_proc(chip); | |
462 | ||
463 | *rchip = chip; | |
464 | return 0; | |
465 | } | |
466 | ||
e2703363 TI |
467 | /* look for a matching quirk alias id */ |
468 | static bool get_alias_id(struct usb_device *dev, unsigned int *id) | |
469 | { | |
470 | int i; | |
471 | unsigned int src, dst; | |
472 | ||
473 | for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { | |
474 | if (!quirk_alias[i] || | |
475 | sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || | |
476 | src != *id) | |
477 | continue; | |
478 | dev_info(&dev->dev, | |
479 | "device (%04x:%04x): applying quirk alias %04x:%04x\n", | |
480 | USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), | |
481 | USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); | |
482 | *id = dst; | |
483 | return true; | |
484 | } | |
485 | ||
486 | return false; | |
487 | } | |
488 | ||
489 | static struct usb_device_id usb_audio_ids[]; /* defined below */ | |
490 | ||
491 | /* look for the corresponding quirk */ | |
492 | static const struct snd_usb_audio_quirk * | |
493 | get_alias_quirk(struct usb_device *dev, unsigned int id) | |
494 | { | |
495 | const struct usb_device_id *p; | |
496 | ||
497 | for (p = usb_audio_ids; p->match_flags; p++) { | |
498 | /* FIXME: this checks only vendor:product pair in the list */ | |
499 | if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == | |
500 | USB_DEVICE_ID_MATCH_DEVICE && | |
501 | p->idVendor == USB_ID_VENDOR(id) && | |
502 | p->idProduct == USB_ID_PRODUCT(id)) | |
503 | return (const struct snd_usb_audio_quirk *)p->driver_info; | |
504 | } | |
505 | ||
506 | return NULL; | |
507 | } | |
508 | ||
e5779998 DM |
509 | /* |
510 | * probe the active usb device | |
511 | * | |
512 | * note that this can be called multiple times per a device, when it | |
513 | * includes multiple audio control interfaces. | |
514 | * | |
515 | * thus we check the usb device pointer and creates the card instance | |
516 | * only at the first time. the successive calls of this function will | |
517 | * append the pcm interface to the corresponding card. | |
518 | */ | |
4c8c3a4f TI |
519 | static int usb_audio_probe(struct usb_interface *intf, |
520 | const struct usb_device_id *usb_id) | |
e5779998 | 521 | { |
4c8c3a4f TI |
522 | struct usb_device *dev = interface_to_usbdev(intf); |
523 | const struct snd_usb_audio_quirk *quirk = | |
524 | (const struct snd_usb_audio_quirk *)usb_id->driver_info; | |
e5779998 | 525 | struct snd_usb_audio *chip; |
4c8c3a4f | 526 | int i, err; |
e5779998 DM |
527 | struct usb_host_interface *alts; |
528 | int ifnum; | |
529 | u32 id; | |
530 | ||
531 | alts = &intf->altsetting[0]; | |
532 | ifnum = get_iface_desc(alts)->bInterfaceNumber; | |
533 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
534 | le16_to_cpu(dev->descriptor.idProduct)); | |
e2703363 TI |
535 | if (get_alias_id(dev, &id)) |
536 | quirk = get_alias_quirk(dev, id); | |
e5779998 | 537 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) |
4c8c3a4f | 538 | return -ENXIO; |
e5779998 | 539 | |
79289e24 | 540 | err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); |
4c8c3a4f TI |
541 | if (err < 0) |
542 | return err; | |
e5779998 DM |
543 | |
544 | /* | |
545 | * found a config. now register to ALSA | |
546 | */ | |
547 | ||
548 | /* check whether it's already registered */ | |
549 | chip = NULL; | |
550 | mutex_lock(®ister_mutex); | |
551 | for (i = 0; i < SNDRV_CARDS; i++) { | |
552 | if (usb_chip[i] && usb_chip[i]->dev == dev) { | |
47ab1545 | 553 | if (atomic_read(&usb_chip[i]->shutdown)) { |
0ba41d91 | 554 | dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); |
4c8c3a4f | 555 | err = -EIO; |
e5779998 DM |
556 | goto __error; |
557 | } | |
558 | chip = usb_chip[i]; | |
a6da499b | 559 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
560 | break; |
561 | } | |
562 | } | |
563 | if (! chip) { | |
564 | /* it's a fresh one. | |
565 | * now look for an empty slot and create a new card instance | |
566 | */ | |
567 | for (i = 0; i < SNDRV_CARDS; i++) | |
568 | if (enable[i] && ! usb_chip[i] && | |
569 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && | |
570 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { | |
4c8c3a4f TI |
571 | err = snd_usb_audio_create(intf, dev, i, quirk, |
572 | &chip); | |
573 | if (err < 0) | |
e5779998 | 574 | goto __error; |
88a8516a | 575 | chip->pm_intf = intf; |
e5779998 DM |
576 | break; |
577 | } | |
578 | if (!chip) { | |
0ba41d91 | 579 | dev_err(&dev->dev, "no available usb audio device\n"); |
4c8c3a4f | 580 | err = -ENODEV; |
e5779998 DM |
581 | goto __error; |
582 | } | |
583 | } | |
76df5296 | 584 | dev_set_drvdata(&dev->dev, chip); |
e5779998 | 585 | |
7b6717e1 DM |
586 | /* |
587 | * For devices with more than one control interface, we assume the | |
588 | * first contains the audio controls. We might need a more specific | |
589 | * check here in the future. | |
590 | */ | |
591 | if (!chip->ctrl_intf) | |
592 | chip->ctrl_intf = alts; | |
79f920fb | 593 | |
5875c2cb DM |
594 | chip->txfr_quirk = 0; |
595 | err = 1; /* continue */ | |
596 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { | |
597 | /* need some special handlings */ | |
4c8c3a4f TI |
598 | err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); |
599 | if (err < 0) | |
5875c2cb DM |
600 | goto __error; |
601 | } | |
602 | ||
e5779998 DM |
603 | if (err > 0) { |
604 | /* create normal USB audio interfaces */ | |
4c8c3a4f TI |
605 | err = snd_usb_create_streams(chip, ifnum); |
606 | if (err < 0) | |
607 | goto __error; | |
608 | err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error); | |
609 | if (err < 0) | |
e5779998 | 610 | goto __error; |
e5779998 DM |
611 | } |
612 | ||
613 | /* we are allowed to call snd_card_register() many times */ | |
4c8c3a4f TI |
614 | err = snd_card_register(chip->card); |
615 | if (err < 0) | |
e5779998 | 616 | goto __error; |
e5779998 DM |
617 | |
618 | usb_chip[chip->index] = chip; | |
619 | chip->num_interfaces++; | |
4c8c3a4f | 620 | usb_set_intfdata(intf, chip); |
a6da499b | 621 | atomic_dec(&chip->active); |
e5779998 | 622 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 623 | return 0; |
e5779998 DM |
624 | |
625 | __error: | |
61a6a108 TP |
626 | if (chip) { |
627 | if (!chip->num_interfaces) | |
628 | snd_card_free(chip->card); | |
a6da499b | 629 | atomic_dec(&chip->active); |
61a6a108 | 630 | } |
e5779998 | 631 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 632 | return err; |
e5779998 DM |
633 | } |
634 | ||
635 | /* | |
636 | * we need to take care of counter, since disconnection can be called also | |
637 | * many times as well as usb_audio_probe(). | |
638 | */ | |
4c8c3a4f | 639 | static void usb_audio_disconnect(struct usb_interface *intf) |
e5779998 | 640 | { |
4c8c3a4f | 641 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
e5779998 | 642 | struct snd_card *card; |
92a586bd | 643 | struct list_head *p; |
e5779998 | 644 | |
81b85b6b | 645 | if (chip == (void *)-1L) |
e5779998 DM |
646 | return; |
647 | ||
e5779998 | 648 | card = chip->card; |
10e44239 TI |
649 | |
650 | mutex_lock(®ister_mutex); | |
47ab1545 | 651 | if (atomic_inc_return(&chip->shutdown) == 1) { |
a6cece9d | 652 | struct snd_usb_stream *as; |
92a586bd | 653 | struct snd_usb_endpoint *ep; |
a6cece9d | 654 | struct usb_mixer_interface *mixer; |
92a586bd | 655 | |
47ab1545 TI |
656 | /* wait until all pending tasks done; |
657 | * they are protected by snd_usb_lock_shutdown() | |
658 | */ | |
659 | wait_event(chip->shutdown_wait, | |
660 | !atomic_read(&chip->usage_count)); | |
e5779998 DM |
661 | snd_card_disconnect(card); |
662 | /* release the pcm resources */ | |
a6cece9d TI |
663 | list_for_each_entry(as, &chip->pcm_list, list) { |
664 | snd_usb_stream_disconnect(as); | |
e5779998 | 665 | } |
edcd3633 | 666 | /* release the endpoint resources */ |
92a586bd TI |
667 | list_for_each_entry(ep, &chip->ep_list, list) { |
668 | snd_usb_endpoint_release(ep); | |
edcd3633 | 669 | } |
e5779998 DM |
670 | /* release the midi resources */ |
671 | list_for_each(p, &chip->midi_list) { | |
672 | snd_usbmidi_disconnect(p); | |
673 | } | |
674 | /* release mixer resources */ | |
a6cece9d TI |
675 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
676 | snd_usb_mixer_disconnect(mixer); | |
e5779998 | 677 | } |
0725dda2 TI |
678 | } |
679 | ||
680 | chip->num_interfaces--; | |
681 | if (chip->num_interfaces <= 0) { | |
e5779998 DM |
682 | usb_chip[chip->index] = NULL; |
683 | mutex_unlock(®ister_mutex); | |
684 | snd_card_free_when_closed(card); | |
685 | } else { | |
686 | mutex_unlock(®ister_mutex); | |
687 | } | |
688 | } | |
689 | ||
47ab1545 TI |
690 | /* lock the shutdown (disconnect) task and autoresume */ |
691 | int snd_usb_lock_shutdown(struct snd_usb_audio *chip) | |
88a8516a | 692 | { |
47ab1545 | 693 | int err; |
88a8516a | 694 | |
47ab1545 TI |
695 | atomic_inc(&chip->usage_count); |
696 | if (atomic_read(&chip->shutdown)) { | |
697 | err = -EIO; | |
698 | goto error; | |
699 | } | |
700 | err = snd_usb_autoresume(chip); | |
701 | if (err < 0) | |
702 | goto error; | |
703 | return 0; | |
88a8516a | 704 | |
47ab1545 TI |
705 | error: |
706 | if (atomic_dec_and_test(&chip->usage_count)) | |
707 | wake_up(&chip->shutdown_wait); | |
88a8516a ON |
708 | return err; |
709 | } | |
710 | ||
47ab1545 TI |
711 | /* autosuspend and unlock the shutdown */ |
712 | void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) | |
713 | { | |
714 | snd_usb_autosuspend(chip); | |
715 | if (atomic_dec_and_test(&chip->usage_count)) | |
716 | wake_up(&chip->shutdown_wait); | |
717 | } | |
718 | ||
719 | #ifdef CONFIG_PM | |
720 | ||
721 | int snd_usb_autoresume(struct snd_usb_audio *chip) | |
722 | { | |
723 | if (atomic_read(&chip->shutdown)) | |
724 | return -EIO; | |
47ab1545 TI |
725 | if (atomic_inc_return(&chip->active) == 1) |
726 | return usb_autopm_get_interface(chip->pm_intf); | |
727 | return 0; | |
728 | } | |
729 | ||
88a8516a ON |
730 | void snd_usb_autosuspend(struct snd_usb_audio *chip) |
731 | { | |
5c06d68b TI |
732 | if (atomic_read(&chip->shutdown)) |
733 | return; | |
47ab1545 | 734 | if (atomic_dec_and_test(&chip->active)) |
88a8516a ON |
735 | usb_autopm_put_interface(chip->pm_intf); |
736 | } | |
737 | ||
e5779998 DM |
738 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
739 | { | |
740 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
e5779998 | 741 | struct snd_usb_stream *as; |
edf7de31 | 742 | struct usb_mixer_interface *mixer; |
f7881e5e | 743 | struct list_head *p; |
e5779998 DM |
744 | |
745 | if (chip == (void *)-1L) | |
746 | return 0; | |
747 | ||
0662292a TI |
748 | chip->autosuspended = !!PMSG_IS_AUTO(message); |
749 | if (!chip->autosuspended) | |
88a8516a | 750 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); |
0662292a TI |
751 | if (!chip->num_suspended_intf++) { |
752 | list_for_each_entry(as, &chip->pcm_list, list) { | |
753 | snd_pcm_suspend_all(as->pcm); | |
754 | as->substream[0].need_setup_ep = | |
755 | as->substream[1].need_setup_ep = true; | |
aa53f986 | 756 | } |
0662292a TI |
757 | list_for_each(p, &chip->midi_list) |
758 | snd_usbmidi_suspend(p); | |
1c53e725 TI |
759 | list_for_each_entry(mixer, &chip->mixer_list, list) |
760 | snd_usb_mixer_suspend(mixer); | |
0662292a | 761 | } |
88a8516a | 762 | |
e5779998 DM |
763 | return 0; |
764 | } | |
765 | ||
400362f1 | 766 | static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) |
e5779998 DM |
767 | { |
768 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
edf7de31 | 769 | struct usb_mixer_interface *mixer; |
f7881e5e | 770 | struct list_head *p; |
88a8516a | 771 | int err = 0; |
e5779998 DM |
772 | |
773 | if (chip == (void *)-1L) | |
774 | return 0; | |
775 | if (--chip->num_suspended_intf) | |
776 | return 0; | |
1ee23fe0 | 777 | |
47ab1545 | 778 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
779 | /* |
780 | * ALSA leaves material resumption to user space | |
edf7de31 | 781 | * we just notify and restart the mixers |
e5779998 | 782 | */ |
88a8516a | 783 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
400362f1 | 784 | err = snd_usb_mixer_resume(mixer, reset_resume); |
88a8516a ON |
785 | if (err < 0) |
786 | goto err_out; | |
787 | } | |
e5779998 | 788 | |
f7881e5e AG |
789 | list_for_each(p, &chip->midi_list) { |
790 | snd_usbmidi_resume(p); | |
791 | } | |
792 | ||
88a8516a ON |
793 | if (!chip->autosuspended) |
794 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); | |
795 | chip->autosuspended = 0; | |
e5779998 | 796 | |
88a8516a | 797 | err_out: |
47ab1545 | 798 | atomic_dec(&chip->active); /* allow autopm after this point */ |
88a8516a | 799 | return err; |
e5779998 | 800 | } |
400362f1 TI |
801 | |
802 | static int usb_audio_resume(struct usb_interface *intf) | |
803 | { | |
804 | return __usb_audio_resume(intf, false); | |
805 | } | |
806 | ||
807 | static int usb_audio_reset_resume(struct usb_interface *intf) | |
808 | { | |
809 | return __usb_audio_resume(intf, true); | |
810 | } | |
6407d474 RD |
811 | #else |
812 | #define usb_audio_suspend NULL | |
813 | #define usb_audio_resume NULL | |
400362f1 | 814 | #define usb_audio_reset_resume NULL |
e5779998 DM |
815 | #endif /* CONFIG_PM */ |
816 | ||
817 | static struct usb_device_id usb_audio_ids [] = { | |
818 | #include "quirks-table.h" | |
819 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), | |
820 | .bInterfaceClass = USB_CLASS_AUDIO, | |
821 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, | |
822 | { } /* Terminating entry */ | |
823 | }; | |
f9d35435 | 824 | MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
e5779998 DM |
825 | |
826 | /* | |
827 | * entry point for linux usb interface | |
828 | */ | |
829 | ||
830 | static struct usb_driver usb_audio_driver = { | |
831 | .name = "snd-usb-audio", | |
832 | .probe = usb_audio_probe, | |
833 | .disconnect = usb_audio_disconnect, | |
834 | .suspend = usb_audio_suspend, | |
835 | .resume = usb_audio_resume, | |
400362f1 | 836 | .reset_resume = usb_audio_reset_resume, |
e5779998 | 837 | .id_table = usb_audio_ids, |
88a8516a | 838 | .supports_autosuspend = 1, |
e5779998 DM |
839 | }; |
840 | ||
6b5a7c66 | 841 | module_usb_driver(usb_audio_driver); |