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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; |
e5779998 DM |
85 | |
86 | module_param_array(index, int, NULL, 0444); | |
87 | MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); | |
88 | module_param_array(id, charp, NULL, 0444); | |
89 | MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); | |
90 | module_param_array(enable, bool, NULL, 0444); | |
91 | MODULE_PARM_DESC(enable, "Enable USB audio adapter."); | |
92 | module_param_array(vid, int, NULL, 0444); | |
93 | MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); | |
94 | module_param_array(pid, int, NULL, 0444); | |
95 | MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); | |
e5779998 DM |
96 | module_param_array(device_setup, int, NULL, 0444); |
97 | MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); | |
98 | module_param(ignore_ctl_error, bool, 0444); | |
99 | MODULE_PARM_DESC(ignore_ctl_error, | |
100 | "Ignore errors from USB controller for mixer interfaces."); | |
ef02e29b EZ |
101 | module_param(autoclock, bool, 0444); |
102 | MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); | |
e5779998 DM |
103 | |
104 | /* | |
105 | * we keep the snd_usb_audio_t instances by ourselves for merging | |
106 | * the all interfaces on the same card as one sound device. | |
107 | */ | |
108 | ||
109 | static DEFINE_MUTEX(register_mutex); | |
110 | static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; | |
111 | static struct usb_driver usb_audio_driver; | |
112 | ||
113 | /* | |
114 | * disconnect streams | |
115 | * called from snd_usb_audio_disconnect() | |
116 | */ | |
117 | static void snd_usb_stream_disconnect(struct list_head *head) | |
118 | { | |
119 | int idx; | |
120 | struct snd_usb_stream *as; | |
121 | struct snd_usb_substream *subs; | |
122 | ||
123 | as = list_entry(head, struct snd_usb_stream, list); | |
124 | for (idx = 0; idx < 2; idx++) { | |
125 | subs = &as->substream[idx]; | |
126 | if (!subs->num_formats) | |
76195fb0 | 127 | continue; |
e5779998 | 128 | subs->interface = -1; |
edcd3633 DM |
129 | subs->data_endpoint = NULL; |
130 | subs->sync_endpoint = NULL; | |
e5779998 DM |
131 | } |
132 | } | |
133 | ||
134 | static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) | |
135 | { | |
136 | struct usb_device *dev = chip->dev; | |
137 | struct usb_host_interface *alts; | |
138 | struct usb_interface_descriptor *altsd; | |
139 | struct usb_interface *iface = usb_ifnum_to_if(dev, interface); | |
140 | ||
141 | if (!iface) { | |
0ba41d91 TI |
142 | dev_err(&dev->dev, "%u:%d : does not exist\n", |
143 | ctrlif, interface); | |
e5779998 DM |
144 | return -EINVAL; |
145 | } | |
146 | ||
342cda29 CL |
147 | alts = &iface->altsetting[0]; |
148 | altsd = get_iface_desc(alts); | |
149 | ||
150 | /* | |
151 | * Android with both accessory and audio interfaces enabled gets the | |
152 | * interface numbers wrong. | |
153 | */ | |
154 | if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || | |
155 | chip->usb_id == USB_ID(0x18d1, 0x2d05)) && | |
156 | interface == 0 && | |
157 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && | |
158 | altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { | |
159 | interface = 2; | |
160 | iface = usb_ifnum_to_if(dev, interface); | |
161 | if (!iface) | |
162 | return -EINVAL; | |
163 | alts = &iface->altsetting[0]; | |
164 | altsd = get_iface_desc(alts); | |
165 | } | |
166 | ||
e5779998 | 167 | if (usb_interface_claimed(iface)) { |
0ba41d91 TI |
168 | dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", |
169 | ctrlif, interface); | |
e5779998 DM |
170 | return -EINVAL; |
171 | } | |
172 | ||
e5779998 DM |
173 | if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || |
174 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && | |
175 | altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { | |
176 | int err = snd_usbmidi_create(chip->card, iface, | |
177 | &chip->midi_list, NULL); | |
178 | if (err < 0) { | |
0ba41d91 TI |
179 | dev_err(&dev->dev, |
180 | "%u:%d: cannot create sequencer device\n", | |
181 | ctrlif, interface); | |
e5779998 DM |
182 | return -EINVAL; |
183 | } | |
184 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && | |
190 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || | |
191 | altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { | |
0ba41d91 TI |
192 | dev_dbg(&dev->dev, |
193 | "%u:%d: skipping non-supported interface %d\n", | |
194 | ctrlif, interface, altsd->bInterfaceClass); | |
e5779998 DM |
195 | /* skip non-supported classes */ |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { | |
0ba41d91 | 200 | dev_err(&dev->dev, "low speed audio streaming not supported\n"); |
e5779998 DM |
201 | return -EINVAL; |
202 | } | |
203 | ||
e8e8babf | 204 | if (! snd_usb_parse_audio_interface(chip, interface)) { |
e5779998 DM |
205 | usb_set_interface(dev, interface, 0); /* reset the current interface */ |
206 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
207 | return -EINVAL; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | /* | |
214 | * parse audio control descriptor and create pcm/midi streams | |
215 | */ | |
216 | static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) | |
217 | { | |
218 | struct usb_device *dev = chip->dev; | |
219 | struct usb_host_interface *host_iface; | |
220 | struct usb_interface_descriptor *altsd; | |
221 | void *control_header; | |
222 | int i, protocol; | |
223 | ||
224 | /* find audiocontrol interface */ | |
225 | host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; | |
226 | control_header = snd_usb_find_csint_desc(host_iface->extra, | |
227 | host_iface->extralen, | |
228 | NULL, UAC_HEADER); | |
229 | altsd = get_iface_desc(host_iface); | |
230 | protocol = altsd->bInterfaceProtocol; | |
231 | ||
232 | if (!control_header) { | |
0ba41d91 | 233 | dev_err(&dev->dev, "cannot find UAC_HEADER\n"); |
e5779998 DM |
234 | return -EINVAL; |
235 | } | |
236 | ||
237 | switch (protocol) { | |
a2acad82 | 238 | default: |
0ba41d91 TI |
239 | dev_warn(&dev->dev, |
240 | "unknown interface protocol %#02x, assuming v1\n", | |
241 | protocol); | |
a2acad82 CL |
242 | /* fall through */ |
243 | ||
e5779998 | 244 | case UAC_VERSION_1: { |
69da9bcb | 245 | struct uac1_ac_header_descriptor *h1 = control_header; |
e5779998 DM |
246 | |
247 | if (!h1->bInCollection) { | |
0ba41d91 | 248 | dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); |
e5779998 DM |
249 | return -EINVAL; |
250 | } | |
251 | ||
252 | if (h1->bLength < sizeof(*h1) + h1->bInCollection) { | |
0ba41d91 | 253 | dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); |
e5779998 DM |
254 | return -EINVAL; |
255 | } | |
256 | ||
257 | for (i = 0; i < h1->bInCollection; i++) | |
258 | snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); | |
259 | ||
260 | break; | |
261 | } | |
262 | ||
263 | case UAC_VERSION_2: { | |
e5779998 DM |
264 | struct usb_interface_assoc_descriptor *assoc = |
265 | usb_ifnum_to_if(dev, ctrlif)->intf_assoc; | |
266 | ||
281a6ac0 CL |
267 | if (!assoc) { |
268 | /* | |
269 | * Firmware writers cannot count to three. So to find | |
270 | * the IAD on the NuForce UDH-100, also check the next | |
271 | * interface. | |
272 | */ | |
273 | struct usb_interface *iface = | |
274 | usb_ifnum_to_if(dev, ctrlif + 1); | |
275 | if (iface && | |
276 | iface->intf_assoc && | |
277 | iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && | |
278 | iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) | |
279 | assoc = iface->intf_assoc; | |
280 | } | |
281 | ||
e5779998 | 282 | if (!assoc) { |
0ba41d91 | 283 | dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n"); |
e5779998 DM |
284 | return -EINVAL; |
285 | } | |
286 | ||
e5779998 DM |
287 | for (i = 0; i < assoc->bInterfaceCount; i++) { |
288 | int intf = assoc->bFirstInterface + i; | |
289 | ||
290 | if (intf != ctrlif) | |
291 | snd_usb_create_stream(chip, ctrlif, intf); | |
292 | } | |
293 | ||
294 | break; | |
295 | } | |
e5779998 DM |
296 | } |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | /* | |
302 | * free the chip instance | |
303 | * | |
304 | * here we have to do not much, since pcm and controls are already freed | |
305 | * | |
306 | */ | |
307 | ||
308 | static int snd_usb_audio_free(struct snd_usb_audio *chip) | |
309 | { | |
92a586bd TI |
310 | struct list_head *p, *n; |
311 | ||
312 | list_for_each_safe(p, n, &chip->ep_list) | |
313 | snd_usb_endpoint_free(p); | |
314 | ||
596580d0 | 315 | mutex_destroy(&chip->mutex); |
e5779998 DM |
316 | kfree(chip); |
317 | return 0; | |
318 | } | |
319 | ||
320 | static int snd_usb_audio_dev_free(struct snd_device *device) | |
321 | { | |
322 | struct snd_usb_audio *chip = device->device_data; | |
323 | return snd_usb_audio_free(chip); | |
324 | } | |
325 | ||
3ffc1222 TI |
326 | static void remove_trailing_spaces(char *str) |
327 | { | |
328 | char *p; | |
329 | ||
330 | if (!*str) | |
331 | return; | |
332 | for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--) | |
333 | *p = 0; | |
334 | } | |
e5779998 DM |
335 | |
336 | /* | |
337 | * create a chip instance and set its names. | |
338 | */ | |
874b8d42 TI |
339 | static int snd_usb_audio_create(struct usb_interface *intf, |
340 | struct usb_device *dev, int idx, | |
e5779998 DM |
341 | const struct snd_usb_audio_quirk *quirk, |
342 | struct snd_usb_audio **rchip) | |
343 | { | |
344 | struct snd_card *card; | |
345 | struct snd_usb_audio *chip; | |
346 | int err, len; | |
347 | char component[14]; | |
348 | static struct snd_device_ops ops = { | |
349 | .dev_free = snd_usb_audio_dev_free, | |
350 | }; | |
351 | ||
352 | *rchip = NULL; | |
353 | ||
4f4e8f69 PZ |
354 | switch (snd_usb_get_speed(dev)) { |
355 | case USB_SPEED_LOW: | |
356 | case USB_SPEED_FULL: | |
357 | case USB_SPEED_HIGH: | |
df3774c5 | 358 | case USB_SPEED_WIRELESS: |
4f4e8f69 PZ |
359 | case USB_SPEED_SUPER: |
360 | break; | |
361 | default: | |
0ba41d91 | 362 | dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); |
e5779998 DM |
363 | return -ENXIO; |
364 | } | |
365 | ||
874b8d42 TI |
366 | err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, |
367 | 0, &card); | |
e5779998 | 368 | if (err < 0) { |
0ba41d91 | 369 | dev_err(&dev->dev, "cannot create card instance %d\n", idx); |
e5779998 DM |
370 | return err; |
371 | } | |
372 | ||
373 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
374 | if (! chip) { | |
375 | snd_card_free(card); | |
376 | return -ENOMEM; | |
377 | } | |
378 | ||
596580d0 | 379 | mutex_init(&chip->mutex); |
34f3c89f | 380 | init_rwsem(&chip->shutdown_rwsem); |
e5779998 DM |
381 | chip->index = idx; |
382 | chip->dev = dev; | |
383 | chip->card = card; | |
384 | chip->setup = device_setup[idx]; | |
ef02e29b | 385 | chip->autoclock = autoclock; |
88a8516a | 386 | chip->probing = 1; |
e5779998 DM |
387 | |
388 | chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
389 | le16_to_cpu(dev->descriptor.idProduct)); | |
390 | INIT_LIST_HEAD(&chip->pcm_list); | |
edcd3633 | 391 | INIT_LIST_HEAD(&chip->ep_list); |
e5779998 DM |
392 | INIT_LIST_HEAD(&chip->midi_list); |
393 | INIT_LIST_HEAD(&chip->mixer_list); | |
394 | ||
395 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { | |
396 | snd_usb_audio_free(chip); | |
397 | snd_card_free(card); | |
398 | return err; | |
399 | } | |
400 | ||
401 | strcpy(card->driver, "USB-Audio"); | |
402 | sprintf(component, "USB%04x:%04x", | |
403 | USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); | |
404 | snd_component_add(card, component); | |
405 | ||
406 | /* retrieve the device string as shortname */ | |
3ffc1222 | 407 | if (quirk && quirk->product_name && *quirk->product_name) { |
e5779998 DM |
408 | strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); |
409 | } else { | |
410 | if (!dev->descriptor.iProduct || | |
411 | usb_string(dev, dev->descriptor.iProduct, | |
412 | card->shortname, sizeof(card->shortname)) <= 0) { | |
413 | /* no name available from anywhere, so use ID */ | |
414 | sprintf(card->shortname, "USB Device %#04x:%#04x", | |
415 | USB_ID_VENDOR(chip->usb_id), | |
416 | USB_ID_PRODUCT(chip->usb_id)); | |
417 | } | |
418 | } | |
3ffc1222 | 419 | remove_trailing_spaces(card->shortname); |
e5779998 DM |
420 | |
421 | /* retrieve the vendor and device strings as longname */ | |
3ffc1222 | 422 | if (quirk && quirk->vendor_name && *quirk->vendor_name) { |
e5779998 DM |
423 | len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); |
424 | } else { | |
425 | if (dev->descriptor.iManufacturer) | |
426 | len = usb_string(dev, dev->descriptor.iManufacturer, | |
427 | card->longname, sizeof(card->longname)); | |
428 | else | |
429 | len = 0; | |
430 | /* we don't really care if there isn't any vendor string */ | |
431 | } | |
3ffc1222 TI |
432 | if (len > 0) { |
433 | remove_trailing_spaces(card->longname); | |
434 | if (*card->longname) | |
435 | strlcat(card->longname, " ", sizeof(card->longname)); | |
436 | } | |
e5779998 DM |
437 | |
438 | strlcat(card->longname, card->shortname, sizeof(card->longname)); | |
439 | ||
440 | len = strlcat(card->longname, " at ", sizeof(card->longname)); | |
441 | ||
442 | if (len < sizeof(card->longname)) | |
443 | usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); | |
444 | ||
4f4e8f69 PZ |
445 | switch (snd_usb_get_speed(dev)) { |
446 | case USB_SPEED_LOW: | |
447 | strlcat(card->longname, ", low speed", sizeof(card->longname)); | |
448 | break; | |
449 | case USB_SPEED_FULL: | |
450 | strlcat(card->longname, ", full speed", sizeof(card->longname)); | |
451 | break; | |
452 | case USB_SPEED_HIGH: | |
453 | strlcat(card->longname, ", high speed", sizeof(card->longname)); | |
454 | break; | |
455 | case USB_SPEED_SUPER: | |
456 | strlcat(card->longname, ", super speed", sizeof(card->longname)); | |
457 | break; | |
458 | default: | |
459 | break; | |
460 | } | |
e5779998 DM |
461 | |
462 | snd_usb_audio_create_proc(chip); | |
463 | ||
464 | *rchip = chip; | |
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * probe the active usb device | |
470 | * | |
471 | * note that this can be called multiple times per a device, when it | |
472 | * includes multiple audio control interfaces. | |
473 | * | |
474 | * thus we check the usb device pointer and creates the card instance | |
475 | * only at the first time. the successive calls of this function will | |
476 | * append the pcm interface to the corresponding card. | |
477 | */ | |
81b85b6b PR |
478 | static struct snd_usb_audio * |
479 | snd_usb_audio_probe(struct usb_device *dev, | |
480 | struct usb_interface *intf, | |
481 | const struct usb_device_id *usb_id) | |
e5779998 DM |
482 | { |
483 | const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info; | |
484 | int i, err; | |
485 | struct snd_usb_audio *chip; | |
486 | struct usb_host_interface *alts; | |
487 | int ifnum; | |
488 | u32 id; | |
489 | ||
490 | alts = &intf->altsetting[0]; | |
491 | ifnum = get_iface_desc(alts)->bInterfaceNumber; | |
492 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
493 | le16_to_cpu(dev->descriptor.idProduct)); | |
494 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) | |
495 | goto __err_val; | |
496 | ||
497 | if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0) | |
498 | goto __err_val; | |
499 | ||
500 | /* | |
501 | * found a config. now register to ALSA | |
502 | */ | |
503 | ||
504 | /* check whether it's already registered */ | |
505 | chip = NULL; | |
506 | mutex_lock(®ister_mutex); | |
507 | for (i = 0; i < SNDRV_CARDS; i++) { | |
508 | if (usb_chip[i] && usb_chip[i]->dev == dev) { | |
509 | if (usb_chip[i]->shutdown) { | |
0ba41d91 | 510 | dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); |
e5779998 DM |
511 | goto __error; |
512 | } | |
513 | chip = usb_chip[i]; | |
88a8516a | 514 | chip->probing = 1; |
e5779998 DM |
515 | break; |
516 | } | |
517 | } | |
518 | if (! chip) { | |
519 | /* it's a fresh one. | |
520 | * now look for an empty slot and create a new card instance | |
521 | */ | |
522 | for (i = 0; i < SNDRV_CARDS; i++) | |
523 | if (enable[i] && ! usb_chip[i] && | |
524 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && | |
525 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { | |
874b8d42 TI |
526 | if (snd_usb_audio_create(intf, dev, i, quirk, |
527 | &chip) < 0) { | |
e5779998 DM |
528 | goto __error; |
529 | } | |
88a8516a | 530 | chip->pm_intf = intf; |
e5779998 DM |
531 | break; |
532 | } | |
533 | if (!chip) { | |
0ba41d91 | 534 | dev_err(&dev->dev, "no available usb audio device\n"); |
e5779998 DM |
535 | goto __error; |
536 | } | |
537 | } | |
538 | ||
7b6717e1 DM |
539 | /* |
540 | * For devices with more than one control interface, we assume the | |
541 | * first contains the audio controls. We might need a more specific | |
542 | * check here in the future. | |
543 | */ | |
544 | if (!chip->ctrl_intf) | |
545 | chip->ctrl_intf = alts; | |
79f920fb | 546 | |
5875c2cb DM |
547 | chip->txfr_quirk = 0; |
548 | err = 1; /* continue */ | |
549 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { | |
550 | /* need some special handlings */ | |
551 | if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0) | |
552 | goto __error; | |
553 | } | |
554 | ||
e5779998 DM |
555 | if (err > 0) { |
556 | /* create normal USB audio interfaces */ | |
557 | if (snd_usb_create_streams(chip, ifnum) < 0 || | |
558 | snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) { | |
559 | goto __error; | |
560 | } | |
561 | } | |
562 | ||
563 | /* we are allowed to call snd_card_register() many times */ | |
564 | if (snd_card_register(chip->card) < 0) { | |
565 | goto __error; | |
566 | } | |
567 | ||
568 | usb_chip[chip->index] = chip; | |
569 | chip->num_interfaces++; | |
88a8516a | 570 | chip->probing = 0; |
e5779998 DM |
571 | mutex_unlock(®ister_mutex); |
572 | return chip; | |
573 | ||
574 | __error: | |
61a6a108 TP |
575 | if (chip) { |
576 | if (!chip->num_interfaces) | |
577 | snd_card_free(chip->card); | |
578 | chip->probing = 0; | |
579 | } | |
e5779998 DM |
580 | mutex_unlock(®ister_mutex); |
581 | __err_val: | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | /* | |
586 | * we need to take care of counter, since disconnection can be called also | |
587 | * many times as well as usb_audio_probe(). | |
588 | */ | |
81b85b6b PR |
589 | static void snd_usb_audio_disconnect(struct usb_device *dev, |
590 | struct snd_usb_audio *chip) | |
e5779998 | 591 | { |
e5779998 | 592 | struct snd_card *card; |
92a586bd | 593 | struct list_head *p; |
0725dda2 | 594 | bool was_shutdown; |
e5779998 | 595 | |
81b85b6b | 596 | if (chip == (void *)-1L) |
e5779998 DM |
597 | return; |
598 | ||
e5779998 | 599 | card = chip->card; |
34f3c89f | 600 | down_write(&chip->shutdown_rwsem); |
0725dda2 | 601 | was_shutdown = chip->shutdown; |
e5779998 | 602 | chip->shutdown = 1; |
10e44239 TI |
603 | up_write(&chip->shutdown_rwsem); |
604 | ||
605 | mutex_lock(®ister_mutex); | |
0725dda2 | 606 | if (!was_shutdown) { |
92a586bd TI |
607 | struct snd_usb_endpoint *ep; |
608 | ||
e5779998 DM |
609 | snd_card_disconnect(card); |
610 | /* release the pcm resources */ | |
611 | list_for_each(p, &chip->pcm_list) { | |
612 | snd_usb_stream_disconnect(p); | |
613 | } | |
edcd3633 | 614 | /* release the endpoint resources */ |
92a586bd TI |
615 | list_for_each_entry(ep, &chip->ep_list, list) { |
616 | snd_usb_endpoint_release(ep); | |
edcd3633 | 617 | } |
e5779998 DM |
618 | /* release the midi resources */ |
619 | list_for_each(p, &chip->midi_list) { | |
620 | snd_usbmidi_disconnect(p); | |
621 | } | |
622 | /* release mixer resources */ | |
623 | list_for_each(p, &chip->mixer_list) { | |
624 | snd_usb_mixer_disconnect(p); | |
625 | } | |
0725dda2 TI |
626 | } |
627 | ||
628 | chip->num_interfaces--; | |
629 | if (chip->num_interfaces <= 0) { | |
e5779998 DM |
630 | usb_chip[chip->index] = NULL; |
631 | mutex_unlock(®ister_mutex); | |
632 | snd_card_free_when_closed(card); | |
633 | } else { | |
634 | mutex_unlock(®ister_mutex); | |
635 | } | |
636 | } | |
637 | ||
638 | /* | |
639 | * new 2.5 USB kernel API | |
640 | */ | |
641 | static int usb_audio_probe(struct usb_interface *intf, | |
642 | const struct usb_device_id *id) | |
643 | { | |
81b85b6b | 644 | struct snd_usb_audio *chip; |
e5779998 DM |
645 | chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id); |
646 | if (chip) { | |
647 | usb_set_intfdata(intf, chip); | |
648 | return 0; | |
649 | } else | |
650 | return -EIO; | |
651 | } | |
652 | ||
653 | static void usb_audio_disconnect(struct usb_interface *intf) | |
654 | { | |
655 | snd_usb_audio_disconnect(interface_to_usbdev(intf), | |
656 | usb_get_intfdata(intf)); | |
657 | } | |
658 | ||
659 | #ifdef CONFIG_PM | |
88a8516a ON |
660 | |
661 | int snd_usb_autoresume(struct snd_usb_audio *chip) | |
662 | { | |
663 | int err = -ENODEV; | |
664 | ||
34f3c89f | 665 | down_read(&chip->shutdown_rwsem); |
1ee23fe0 | 666 | if (chip->probing && chip->in_pm) |
60af3d03 TI |
667 | err = 0; |
668 | else if (!chip->shutdown) | |
88a8516a | 669 | err = usb_autopm_get_interface(chip->pm_intf); |
34f3c89f | 670 | up_read(&chip->shutdown_rwsem); |
88a8516a ON |
671 | |
672 | return err; | |
673 | } | |
674 | ||
675 | void snd_usb_autosuspend(struct snd_usb_audio *chip) | |
676 | { | |
34f3c89f | 677 | down_read(&chip->shutdown_rwsem); |
1ee23fe0 | 678 | if (!chip->shutdown && !chip->probing && !chip->in_pm) |
88a8516a | 679 | usb_autopm_put_interface(chip->pm_intf); |
34f3c89f | 680 | up_read(&chip->shutdown_rwsem); |
88a8516a ON |
681 | } |
682 | ||
e5779998 DM |
683 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
684 | { | |
685 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
e5779998 | 686 | struct snd_usb_stream *as; |
edf7de31 | 687 | struct usb_mixer_interface *mixer; |
f7881e5e | 688 | struct list_head *p; |
e5779998 DM |
689 | |
690 | if (chip == (void *)-1L) | |
691 | return 0; | |
692 | ||
5b1b0b81 | 693 | if (!PMSG_IS_AUTO(message)) { |
88a8516a ON |
694 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); |
695 | if (!chip->num_suspended_intf++) { | |
88766f04 | 696 | list_for_each_entry(as, &chip->pcm_list, list) { |
88a8516a | 697 | snd_pcm_suspend_all(as->pcm); |
384dc085 TI |
698 | as->substream[0].need_setup_ep = |
699 | as->substream[1].need_setup_ep = true; | |
88a8516a | 700 | } |
f7881e5e AG |
701 | list_for_each(p, &chip->midi_list) { |
702 | snd_usbmidi_suspend(p); | |
703 | } | |
aa53f986 | 704 | } |
88a8516a ON |
705 | } else { |
706 | /* | |
707 | * otherwise we keep the rest of the system in the dark | |
708 | * to keep this transparent | |
709 | */ | |
710 | if (!chip->num_suspended_intf++) | |
711 | chip->autosuspended = 1; | |
e5779998 DM |
712 | } |
713 | ||
1c53e725 TI |
714 | if (chip->num_suspended_intf == 1) |
715 | list_for_each_entry(mixer, &chip->mixer_list, list) | |
716 | snd_usb_mixer_suspend(mixer); | |
88a8516a | 717 | |
e5779998 DM |
718 | return 0; |
719 | } | |
720 | ||
400362f1 | 721 | static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) |
e5779998 DM |
722 | { |
723 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
edf7de31 | 724 | struct usb_mixer_interface *mixer; |
f7881e5e | 725 | struct list_head *p; |
88a8516a | 726 | int err = 0; |
e5779998 DM |
727 | |
728 | if (chip == (void *)-1L) | |
729 | return 0; | |
730 | if (--chip->num_suspended_intf) | |
731 | return 0; | |
1ee23fe0 TI |
732 | |
733 | chip->in_pm = 1; | |
e5779998 DM |
734 | /* |
735 | * ALSA leaves material resumption to user space | |
edf7de31 | 736 | * we just notify and restart the mixers |
e5779998 | 737 | */ |
88a8516a | 738 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
400362f1 | 739 | err = snd_usb_mixer_resume(mixer, reset_resume); |
88a8516a ON |
740 | if (err < 0) |
741 | goto err_out; | |
742 | } | |
e5779998 | 743 | |
f7881e5e AG |
744 | list_for_each(p, &chip->midi_list) { |
745 | snd_usbmidi_resume(p); | |
746 | } | |
747 | ||
88a8516a ON |
748 | if (!chip->autosuspended) |
749 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); | |
750 | chip->autosuspended = 0; | |
e5779998 | 751 | |
88a8516a | 752 | err_out: |
1ee23fe0 | 753 | chip->in_pm = 0; |
88a8516a | 754 | return err; |
e5779998 | 755 | } |
400362f1 TI |
756 | |
757 | static int usb_audio_resume(struct usb_interface *intf) | |
758 | { | |
759 | return __usb_audio_resume(intf, false); | |
760 | } | |
761 | ||
762 | static int usb_audio_reset_resume(struct usb_interface *intf) | |
763 | { | |
764 | return __usb_audio_resume(intf, true); | |
765 | } | |
6407d474 RD |
766 | #else |
767 | #define usb_audio_suspend NULL | |
768 | #define usb_audio_resume NULL | |
400362f1 | 769 | #define usb_audio_reset_resume NULL |
e5779998 DM |
770 | #endif /* CONFIG_PM */ |
771 | ||
772 | static struct usb_device_id usb_audio_ids [] = { | |
773 | #include "quirks-table.h" | |
774 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), | |
775 | .bInterfaceClass = USB_CLASS_AUDIO, | |
776 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, | |
777 | { } /* Terminating entry */ | |
778 | }; | |
f9d35435 | 779 | MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
e5779998 DM |
780 | |
781 | /* | |
782 | * entry point for linux usb interface | |
783 | */ | |
784 | ||
785 | static struct usb_driver usb_audio_driver = { | |
786 | .name = "snd-usb-audio", | |
787 | .probe = usb_audio_probe, | |
788 | .disconnect = usb_audio_disconnect, | |
789 | .suspend = usb_audio_suspend, | |
790 | .resume = usb_audio_resume, | |
400362f1 | 791 | .reset_resume = usb_audio_reset_resume, |
e5779998 | 792 | .id_table = usb_audio_ids, |
88a8516a | 793 | .supports_autosuspend = 1, |
e5779998 DM |
794 | }; |
795 | ||
6b5a7c66 | 796 | module_usb_driver(usb_audio_driver); |