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 | 353 | case USB_SPEED_SUPER: |
748a1ccc | 354 | case USB_SPEED_SUPER_PLUS: |
4f4e8f69 PZ |
355 | break; |
356 | default: | |
0ba41d91 | 357 | dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); |
e5779998 DM |
358 | return -ENXIO; |
359 | } | |
360 | ||
874b8d42 TI |
361 | err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, |
362 | 0, &card); | |
e5779998 | 363 | if (err < 0) { |
0ba41d91 | 364 | dev_err(&dev->dev, "cannot create card instance %d\n", idx); |
e5779998 DM |
365 | return err; |
366 | } | |
367 | ||
368 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
369 | if (! chip) { | |
370 | snd_card_free(card); | |
371 | return -ENOMEM; | |
372 | } | |
373 | ||
596580d0 | 374 | mutex_init(&chip->mutex); |
47ab1545 | 375 | init_waitqueue_head(&chip->shutdown_wait); |
e5779998 DM |
376 | chip->index = idx; |
377 | chip->dev = dev; | |
378 | chip->card = card; | |
379 | chip->setup = device_setup[idx]; | |
ef02e29b | 380 | chip->autoclock = autoclock; |
a6da499b | 381 | atomic_set(&chip->active, 1); /* avoid autopm during probing */ |
47ab1545 TI |
382 | atomic_set(&chip->usage_count, 0); |
383 | atomic_set(&chip->shutdown, 0); | |
e5779998 DM |
384 | |
385 | chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
386 | le16_to_cpu(dev->descriptor.idProduct)); | |
387 | INIT_LIST_HEAD(&chip->pcm_list); | |
edcd3633 | 388 | INIT_LIST_HEAD(&chip->ep_list); |
e5779998 DM |
389 | INIT_LIST_HEAD(&chip->midi_list); |
390 | INIT_LIST_HEAD(&chip->mixer_list); | |
391 | ||
392 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { | |
393 | snd_usb_audio_free(chip); | |
394 | snd_card_free(card); | |
395 | return err; | |
396 | } | |
397 | ||
398 | strcpy(card->driver, "USB-Audio"); | |
399 | sprintf(component, "USB%04x:%04x", | |
400 | USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); | |
401 | snd_component_add(card, component); | |
402 | ||
403 | /* retrieve the device string as shortname */ | |
3ffc1222 | 404 | if (quirk && quirk->product_name && *quirk->product_name) { |
e5779998 DM |
405 | strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); |
406 | } else { | |
407 | if (!dev->descriptor.iProduct || | |
408 | usb_string(dev, dev->descriptor.iProduct, | |
409 | card->shortname, sizeof(card->shortname)) <= 0) { | |
410 | /* no name available from anywhere, so use ID */ | |
411 | sprintf(card->shortname, "USB Device %#04x:%#04x", | |
412 | USB_ID_VENDOR(chip->usb_id), | |
413 | USB_ID_PRODUCT(chip->usb_id)); | |
414 | } | |
415 | } | |
ae366c20 | 416 | strim(card->shortname); |
e5779998 DM |
417 | |
418 | /* retrieve the vendor and device strings as longname */ | |
3ffc1222 | 419 | if (quirk && quirk->vendor_name && *quirk->vendor_name) { |
e5779998 DM |
420 | len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); |
421 | } else { | |
422 | if (dev->descriptor.iManufacturer) | |
423 | len = usb_string(dev, dev->descriptor.iManufacturer, | |
424 | card->longname, sizeof(card->longname)); | |
425 | else | |
426 | len = 0; | |
427 | /* we don't really care if there isn't any vendor string */ | |
428 | } | |
3ffc1222 | 429 | if (len > 0) { |
ae366c20 | 430 | strim(card->longname); |
3ffc1222 TI |
431 | if (*card->longname) |
432 | strlcat(card->longname, " ", sizeof(card->longname)); | |
433 | } | |
e5779998 DM |
434 | |
435 | strlcat(card->longname, card->shortname, sizeof(card->longname)); | |
436 | ||
437 | len = strlcat(card->longname, " at ", sizeof(card->longname)); | |
438 | ||
439 | if (len < sizeof(card->longname)) | |
440 | usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); | |
441 | ||
4f4e8f69 PZ |
442 | switch (snd_usb_get_speed(dev)) { |
443 | case USB_SPEED_LOW: | |
444 | strlcat(card->longname, ", low speed", sizeof(card->longname)); | |
445 | break; | |
446 | case USB_SPEED_FULL: | |
447 | strlcat(card->longname, ", full speed", sizeof(card->longname)); | |
448 | break; | |
449 | case USB_SPEED_HIGH: | |
450 | strlcat(card->longname, ", high speed", sizeof(card->longname)); | |
451 | break; | |
452 | case USB_SPEED_SUPER: | |
453 | strlcat(card->longname, ", super speed", sizeof(card->longname)); | |
454 | break; | |
748a1ccc ON |
455 | case USB_SPEED_SUPER_PLUS: |
456 | strlcat(card->longname, ", super speed plus", sizeof(card->longname)); | |
457 | break; | |
4f4e8f69 PZ |
458 | default: |
459 | break; | |
460 | } | |
e5779998 DM |
461 | |
462 | snd_usb_audio_create_proc(chip); | |
463 | ||
464 | *rchip = chip; | |
465 | return 0; | |
466 | } | |
467 | ||
e2703363 TI |
468 | /* look for a matching quirk alias id */ |
469 | static bool get_alias_id(struct usb_device *dev, unsigned int *id) | |
470 | { | |
471 | int i; | |
472 | unsigned int src, dst; | |
473 | ||
474 | for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { | |
475 | if (!quirk_alias[i] || | |
476 | sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || | |
477 | src != *id) | |
478 | continue; | |
479 | dev_info(&dev->dev, | |
480 | "device (%04x:%04x): applying quirk alias %04x:%04x\n", | |
481 | USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), | |
482 | USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); | |
483 | *id = dst; | |
484 | return true; | |
485 | } | |
486 | ||
487 | return false; | |
488 | } | |
489 | ||
490 | static struct usb_device_id usb_audio_ids[]; /* defined below */ | |
491 | ||
492 | /* look for the corresponding quirk */ | |
493 | static const struct snd_usb_audio_quirk * | |
494 | get_alias_quirk(struct usb_device *dev, unsigned int id) | |
495 | { | |
496 | const struct usb_device_id *p; | |
497 | ||
498 | for (p = usb_audio_ids; p->match_flags; p++) { | |
499 | /* FIXME: this checks only vendor:product pair in the list */ | |
500 | if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == | |
501 | USB_DEVICE_ID_MATCH_DEVICE && | |
502 | p->idVendor == USB_ID_VENDOR(id) && | |
503 | p->idProduct == USB_ID_PRODUCT(id)) | |
504 | return (const struct snd_usb_audio_quirk *)p->driver_info; | |
505 | } | |
506 | ||
507 | return NULL; | |
508 | } | |
509 | ||
e5779998 DM |
510 | /* |
511 | * probe the active usb device | |
512 | * | |
513 | * note that this can be called multiple times per a device, when it | |
514 | * includes multiple audio control interfaces. | |
515 | * | |
516 | * thus we check the usb device pointer and creates the card instance | |
517 | * only at the first time. the successive calls of this function will | |
518 | * append the pcm interface to the corresponding card. | |
519 | */ | |
4c8c3a4f TI |
520 | static int usb_audio_probe(struct usb_interface *intf, |
521 | const struct usb_device_id *usb_id) | |
e5779998 | 522 | { |
4c8c3a4f TI |
523 | struct usb_device *dev = interface_to_usbdev(intf); |
524 | const struct snd_usb_audio_quirk *quirk = | |
525 | (const struct snd_usb_audio_quirk *)usb_id->driver_info; | |
e5779998 | 526 | struct snd_usb_audio *chip; |
4c8c3a4f | 527 | int i, err; |
e5779998 DM |
528 | struct usb_host_interface *alts; |
529 | int ifnum; | |
530 | u32 id; | |
531 | ||
532 | alts = &intf->altsetting[0]; | |
533 | ifnum = get_iface_desc(alts)->bInterfaceNumber; | |
534 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
535 | le16_to_cpu(dev->descriptor.idProduct)); | |
e2703363 TI |
536 | if (get_alias_id(dev, &id)) |
537 | quirk = get_alias_quirk(dev, id); | |
e5779998 | 538 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) |
4c8c3a4f | 539 | return -ENXIO; |
e5779998 | 540 | |
79289e24 | 541 | err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); |
4c8c3a4f TI |
542 | if (err < 0) |
543 | return err; | |
e5779998 DM |
544 | |
545 | /* | |
546 | * found a config. now register to ALSA | |
547 | */ | |
548 | ||
549 | /* check whether it's already registered */ | |
550 | chip = NULL; | |
551 | mutex_lock(®ister_mutex); | |
552 | for (i = 0; i < SNDRV_CARDS; i++) { | |
553 | if (usb_chip[i] && usb_chip[i]->dev == dev) { | |
47ab1545 | 554 | if (atomic_read(&usb_chip[i]->shutdown)) { |
0ba41d91 | 555 | dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); |
4c8c3a4f | 556 | err = -EIO; |
e5779998 DM |
557 | goto __error; |
558 | } | |
559 | chip = usb_chip[i]; | |
79289e24 | 560 | dev_set_drvdata(&dev->dev, chip); |
a6da499b | 561 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
562 | break; |
563 | } | |
564 | } | |
565 | if (! chip) { | |
566 | /* it's a fresh one. | |
567 | * now look for an empty slot and create a new card instance | |
568 | */ | |
569 | for (i = 0; i < SNDRV_CARDS; i++) | |
570 | if (enable[i] && ! usb_chip[i] && | |
571 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && | |
572 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { | |
4c8c3a4f TI |
573 | err = snd_usb_audio_create(intf, dev, i, quirk, |
574 | &chip); | |
575 | if (err < 0) | |
e5779998 | 576 | goto __error; |
88a8516a | 577 | chip->pm_intf = intf; |
e5779998 DM |
578 | break; |
579 | } | |
580 | if (!chip) { | |
0ba41d91 | 581 | dev_err(&dev->dev, "no available usb audio device\n"); |
4c8c3a4f | 582 | err = -ENODEV; |
e5779998 DM |
583 | goto __error; |
584 | } | |
585 | } | |
586 | ||
7b6717e1 DM |
587 | /* |
588 | * For devices with more than one control interface, we assume the | |
589 | * first contains the audio controls. We might need a more specific | |
590 | * check here in the future. | |
591 | */ | |
592 | if (!chip->ctrl_intf) | |
593 | chip->ctrl_intf = alts; | |
79f920fb | 594 | |
5875c2cb DM |
595 | chip->txfr_quirk = 0; |
596 | err = 1; /* continue */ | |
597 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { | |
598 | /* need some special handlings */ | |
4c8c3a4f TI |
599 | err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); |
600 | if (err < 0) | |
5875c2cb DM |
601 | goto __error; |
602 | } | |
603 | ||
e5779998 DM |
604 | if (err > 0) { |
605 | /* create normal USB audio interfaces */ | |
4c8c3a4f TI |
606 | err = snd_usb_create_streams(chip, ifnum); |
607 | if (err < 0) | |
608 | goto __error; | |
609 | err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error); | |
610 | if (err < 0) | |
e5779998 | 611 | goto __error; |
e5779998 DM |
612 | } |
613 | ||
614 | /* we are allowed to call snd_card_register() many times */ | |
4c8c3a4f TI |
615 | err = snd_card_register(chip->card); |
616 | if (err < 0) | |
e5779998 | 617 | goto __error; |
e5779998 | 618 | |
aebb2b89 SK |
619 | if (quirk->media_device) { |
620 | /* don't want to fail when media_snd_device_create() fails */ | |
621 | media_snd_device_create(chip, intf); | |
622 | } | |
623 | ||
e5779998 DM |
624 | usb_chip[chip->index] = chip; |
625 | chip->num_interfaces++; | |
4c8c3a4f | 626 | usb_set_intfdata(intf, chip); |
a6da499b | 627 | atomic_dec(&chip->active); |
e5779998 | 628 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 629 | return 0; |
e5779998 DM |
630 | |
631 | __error: | |
61a6a108 TP |
632 | if (chip) { |
633 | if (!chip->num_interfaces) | |
634 | snd_card_free(chip->card); | |
a6da499b | 635 | atomic_dec(&chip->active); |
61a6a108 | 636 | } |
e5779998 | 637 | mutex_unlock(®ister_mutex); |
4c8c3a4f | 638 | return err; |
e5779998 DM |
639 | } |
640 | ||
641 | /* | |
642 | * we need to take care of counter, since disconnection can be called also | |
643 | * many times as well as usb_audio_probe(). | |
644 | */ | |
4c8c3a4f | 645 | static void usb_audio_disconnect(struct usb_interface *intf) |
e5779998 | 646 | { |
4c8c3a4f | 647 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
e5779998 | 648 | struct snd_card *card; |
92a586bd | 649 | struct list_head *p; |
e5779998 | 650 | |
81b85b6b | 651 | if (chip == (void *)-1L) |
e5779998 DM |
652 | return; |
653 | ||
e5779998 | 654 | card = chip->card; |
10e44239 TI |
655 | |
656 | mutex_lock(®ister_mutex); | |
47ab1545 | 657 | if (atomic_inc_return(&chip->shutdown) == 1) { |
a6cece9d | 658 | struct snd_usb_stream *as; |
92a586bd | 659 | struct snd_usb_endpoint *ep; |
a6cece9d | 660 | struct usb_mixer_interface *mixer; |
92a586bd | 661 | |
47ab1545 TI |
662 | /* wait until all pending tasks done; |
663 | * they are protected by snd_usb_lock_shutdown() | |
664 | */ | |
665 | wait_event(chip->shutdown_wait, | |
666 | !atomic_read(&chip->usage_count)); | |
e5779998 DM |
667 | snd_card_disconnect(card); |
668 | /* release the pcm resources */ | |
a6cece9d TI |
669 | list_for_each_entry(as, &chip->pcm_list, list) { |
670 | snd_usb_stream_disconnect(as); | |
e5779998 | 671 | } |
edcd3633 | 672 | /* release the endpoint resources */ |
92a586bd TI |
673 | list_for_each_entry(ep, &chip->ep_list, list) { |
674 | snd_usb_endpoint_release(ep); | |
edcd3633 | 675 | } |
e5779998 DM |
676 | /* release the midi resources */ |
677 | list_for_each(p, &chip->midi_list) { | |
678 | snd_usbmidi_disconnect(p); | |
679 | } | |
aebb2b89 SK |
680 | /* |
681 | * Nice to check quirk && quirk->media_device | |
682 | * need some special handlings. Doesn't look like | |
683 | * we have access to quirk here | |
684 | * Acceses mixer_list | |
685 | */ | |
686 | media_snd_device_delete(chip); | |
687 | ||
e5779998 | 688 | /* release mixer resources */ |
a6cece9d TI |
689 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
690 | snd_usb_mixer_disconnect(mixer); | |
e5779998 | 691 | } |
0725dda2 TI |
692 | } |
693 | ||
694 | chip->num_interfaces--; | |
695 | if (chip->num_interfaces <= 0) { | |
e5779998 DM |
696 | usb_chip[chip->index] = NULL; |
697 | mutex_unlock(®ister_mutex); | |
698 | snd_card_free_when_closed(card); | |
699 | } else { | |
700 | mutex_unlock(®ister_mutex); | |
701 | } | |
702 | } | |
703 | ||
47ab1545 TI |
704 | /* lock the shutdown (disconnect) task and autoresume */ |
705 | int snd_usb_lock_shutdown(struct snd_usb_audio *chip) | |
88a8516a | 706 | { |
47ab1545 | 707 | int err; |
88a8516a | 708 | |
47ab1545 TI |
709 | atomic_inc(&chip->usage_count); |
710 | if (atomic_read(&chip->shutdown)) { | |
711 | err = -EIO; | |
712 | goto error; | |
713 | } | |
714 | err = snd_usb_autoresume(chip); | |
715 | if (err < 0) | |
716 | goto error; | |
717 | return 0; | |
88a8516a | 718 | |
47ab1545 TI |
719 | error: |
720 | if (atomic_dec_and_test(&chip->usage_count)) | |
721 | wake_up(&chip->shutdown_wait); | |
88a8516a ON |
722 | return err; |
723 | } | |
724 | ||
47ab1545 TI |
725 | /* autosuspend and unlock the shutdown */ |
726 | void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) | |
727 | { | |
728 | snd_usb_autosuspend(chip); | |
729 | if (atomic_dec_and_test(&chip->usage_count)) | |
730 | wake_up(&chip->shutdown_wait); | |
731 | } | |
732 | ||
733 | #ifdef CONFIG_PM | |
734 | ||
735 | int snd_usb_autoresume(struct snd_usb_audio *chip) | |
736 | { | |
737 | if (atomic_read(&chip->shutdown)) | |
738 | return -EIO; | |
47ab1545 TI |
739 | if (atomic_inc_return(&chip->active) == 1) |
740 | return usb_autopm_get_interface(chip->pm_intf); | |
741 | return 0; | |
742 | } | |
743 | ||
88a8516a ON |
744 | void snd_usb_autosuspend(struct snd_usb_audio *chip) |
745 | { | |
5c06d68b TI |
746 | if (atomic_read(&chip->shutdown)) |
747 | return; | |
47ab1545 | 748 | if (atomic_dec_and_test(&chip->active)) |
88a8516a ON |
749 | usb_autopm_put_interface(chip->pm_intf); |
750 | } | |
751 | ||
e5779998 DM |
752 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
753 | { | |
754 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
e5779998 | 755 | struct snd_usb_stream *as; |
edf7de31 | 756 | struct usb_mixer_interface *mixer; |
f7881e5e | 757 | struct list_head *p; |
e5779998 DM |
758 | |
759 | if (chip == (void *)-1L) | |
760 | return 0; | |
761 | ||
0662292a TI |
762 | chip->autosuspended = !!PMSG_IS_AUTO(message); |
763 | if (!chip->autosuspended) | |
88a8516a | 764 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); |
0662292a TI |
765 | if (!chip->num_suspended_intf++) { |
766 | list_for_each_entry(as, &chip->pcm_list, list) { | |
767 | snd_pcm_suspend_all(as->pcm); | |
768 | as->substream[0].need_setup_ep = | |
769 | as->substream[1].need_setup_ep = true; | |
aa53f986 | 770 | } |
0662292a TI |
771 | list_for_each(p, &chip->midi_list) |
772 | snd_usbmidi_suspend(p); | |
1c53e725 TI |
773 | list_for_each_entry(mixer, &chip->mixer_list, list) |
774 | snd_usb_mixer_suspend(mixer); | |
0662292a | 775 | } |
88a8516a | 776 | |
e5779998 DM |
777 | return 0; |
778 | } | |
779 | ||
400362f1 | 780 | static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) |
e5779998 DM |
781 | { |
782 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
edf7de31 | 783 | struct usb_mixer_interface *mixer; |
f7881e5e | 784 | struct list_head *p; |
88a8516a | 785 | int err = 0; |
e5779998 DM |
786 | |
787 | if (chip == (void *)-1L) | |
788 | return 0; | |
789 | if (--chip->num_suspended_intf) | |
790 | return 0; | |
1ee23fe0 | 791 | |
47ab1545 | 792 | atomic_inc(&chip->active); /* avoid autopm */ |
e5779998 DM |
793 | /* |
794 | * ALSA leaves material resumption to user space | |
edf7de31 | 795 | * we just notify and restart the mixers |
e5779998 | 796 | */ |
88a8516a | 797 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
400362f1 | 798 | err = snd_usb_mixer_resume(mixer, reset_resume); |
88a8516a ON |
799 | if (err < 0) |
800 | goto err_out; | |
801 | } | |
e5779998 | 802 | |
f7881e5e AG |
803 | list_for_each(p, &chip->midi_list) { |
804 | snd_usbmidi_resume(p); | |
805 | } | |
806 | ||
88a8516a ON |
807 | if (!chip->autosuspended) |
808 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); | |
809 | chip->autosuspended = 0; | |
e5779998 | 810 | |
88a8516a | 811 | err_out: |
47ab1545 | 812 | atomic_dec(&chip->active); /* allow autopm after this point */ |
88a8516a | 813 | return err; |
e5779998 | 814 | } |
400362f1 TI |
815 | |
816 | static int usb_audio_resume(struct usb_interface *intf) | |
817 | { | |
818 | return __usb_audio_resume(intf, false); | |
819 | } | |
820 | ||
821 | static int usb_audio_reset_resume(struct usb_interface *intf) | |
822 | { | |
823 | return __usb_audio_resume(intf, true); | |
824 | } | |
6407d474 RD |
825 | #else |
826 | #define usb_audio_suspend NULL | |
827 | #define usb_audio_resume NULL | |
400362f1 | 828 | #define usb_audio_reset_resume NULL |
e5779998 DM |
829 | #endif /* CONFIG_PM */ |
830 | ||
831 | static struct usb_device_id usb_audio_ids [] = { | |
832 | #include "quirks-table.h" | |
833 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), | |
834 | .bInterfaceClass = USB_CLASS_AUDIO, | |
835 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, | |
836 | { } /* Terminating entry */ | |
837 | }; | |
f9d35435 | 838 | MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
e5779998 DM |
839 | |
840 | /* | |
841 | * entry point for linux usb interface | |
842 | */ | |
843 | ||
844 | static struct usb_driver usb_audio_driver = { | |
845 | .name = "snd-usb-audio", | |
846 | .probe = usb_audio_probe, | |
847 | .disconnect = usb_audio_disconnect, | |
848 | .suspend = usb_audio_suspend, | |
849 | .resume = usb_audio_resume, | |
400362f1 | 850 | .reset_resume = usb_audio_reset_resume, |
e5779998 | 851 | .id_table = usb_audio_ids, |
88a8516a | 852 | .supports_autosuspend = 1, |
e5779998 DM |
853 | }; |
854 | ||
6b5a7c66 | 855 | module_usb_driver(usb_audio_driver); |