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