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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 | * | |
28 | * - async unlink should be used for avoiding the sleep inside lock. | |
29 | * 2.4.22 usb-uhci seems buggy for async unlinking and results in | |
30 | * oops. in such a cse, pass async_unlink=0 option. | |
31 | * - the linked URBs would be preferred but not used so far because of | |
32 | * the instability of unlinking. | |
33 | * - type II is not supported properly. there is no device which supports | |
34 | * this type *correctly*. SB extigy looks as if it supports, but it's | |
35 | * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream). | |
36 | */ | |
37 | ||
38 | ||
39 | #include <linux/bitops.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/list.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/string.h> | |
3ffc1222 | 44 | #include <linux/ctype.h> |
e5779998 DM |
45 | #include <linux/usb.h> |
46 | #include <linux/moduleparam.h> | |
47 | #include <linux/mutex.h> | |
48 | #include <linux/usb/audio.h> | |
7e847894 | 49 | #include <linux/usb/audio-v2.h> |
e5779998 DM |
50 | |
51 | #include <sound/core.h> | |
52 | #include <sound/info.h> | |
53 | #include <sound/pcm.h> | |
54 | #include <sound/pcm_params.h> | |
55 | #include <sound/initval.h> | |
56 | ||
57 | #include "usbaudio.h" | |
58 | #include "card.h" | |
59 | #include "midi.h" | |
f0b5e634 | 60 | #include "mixer.h" |
e5779998 DM |
61 | #include "proc.h" |
62 | #include "quirks.h" | |
63 | #include "endpoint.h" | |
64 | #include "helper.h" | |
65 | #include "debug.h" | |
66 | #include "pcm.h" | |
67 | #include "urb.h" | |
68 | #include "format.h" | |
88a8516a | 69 | #include "power.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 */ | |
79 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ | |
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 }; | |
83 | static int nrpacks = 8; /* max. number of packets per urb */ | |
84 | static int async_unlink = 1; | |
85 | static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ | |
86 | static int ignore_ctl_error; | |
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."); | |
98 | module_param(nrpacks, int, 0644); | |
99 | MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB."); | |
100 | module_param(async_unlink, bool, 0444); | |
101 | MODULE_PARM_DESC(async_unlink, "Use async unlink mode."); | |
102 | module_param_array(device_setup, int, NULL, 0444); | |
103 | MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); | |
104 | module_param(ignore_ctl_error, bool, 0444); | |
105 | MODULE_PARM_DESC(ignore_ctl_error, | |
106 | "Ignore errors from USB controller for mixer interfaces."); | |
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 | |
119 | * called from snd_usb_audio_disconnect() | |
120 | */ | |
121 | static void snd_usb_stream_disconnect(struct list_head *head) | |
122 | { | |
123 | int idx; | |
124 | struct snd_usb_stream *as; | |
125 | struct snd_usb_substream *subs; | |
126 | ||
127 | as = list_entry(head, struct snd_usb_stream, list); | |
128 | for (idx = 0; idx < 2; idx++) { | |
129 | subs = &as->substream[idx]; | |
130 | if (!subs->num_formats) | |
76195fb0 | 131 | continue; |
e5779998 DM |
132 | snd_usb_release_substream_urbs(subs, 1); |
133 | subs->interface = -1; | |
134 | } | |
135 | } | |
136 | ||
137 | static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) | |
138 | { | |
139 | struct usb_device *dev = chip->dev; | |
140 | struct usb_host_interface *alts; | |
141 | struct usb_interface_descriptor *altsd; | |
142 | struct usb_interface *iface = usb_ifnum_to_if(dev, interface); | |
143 | ||
144 | if (!iface) { | |
145 | snd_printk(KERN_ERR "%d:%u:%d : does not exist\n", | |
146 | dev->devnum, ctrlif, interface); | |
147 | return -EINVAL; | |
148 | } | |
149 | ||
150 | if (usb_interface_claimed(iface)) { | |
151 | snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", | |
152 | dev->devnum, ctrlif, interface); | |
153 | return -EINVAL; | |
154 | } | |
155 | ||
156 | alts = &iface->altsetting[0]; | |
157 | altsd = get_iface_desc(alts); | |
158 | if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || | |
159 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && | |
160 | altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { | |
161 | int err = snd_usbmidi_create(chip->card, iface, | |
162 | &chip->midi_list, NULL); | |
163 | if (err < 0) { | |
164 | snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", | |
165 | dev->devnum, ctrlif, interface); | |
166 | return -EINVAL; | |
167 | } | |
168 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && | |
174 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || | |
175 | altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { | |
176 | snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", | |
177 | dev->devnum, ctrlif, interface, altsd->bInterfaceClass); | |
178 | /* skip non-supported classes */ | |
179 | return -EINVAL; | |
180 | } | |
181 | ||
182 | if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { | |
183 | snd_printk(KERN_ERR "low speed audio streaming not supported\n"); | |
184 | return -EINVAL; | |
185 | } | |
186 | ||
187 | if (! snd_usb_parse_audio_endpoints(chip, interface)) { | |
188 | usb_set_interface(dev, interface, 0); /* reset the current interface */ | |
189 | usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | /* | |
197 | * parse audio control descriptor and create pcm/midi streams | |
198 | */ | |
199 | static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) | |
200 | { | |
201 | struct usb_device *dev = chip->dev; | |
202 | struct usb_host_interface *host_iface; | |
203 | struct usb_interface_descriptor *altsd; | |
204 | void *control_header; | |
205 | int i, protocol; | |
206 | ||
207 | /* find audiocontrol interface */ | |
208 | host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; | |
209 | control_header = snd_usb_find_csint_desc(host_iface->extra, | |
210 | host_iface->extralen, | |
211 | NULL, UAC_HEADER); | |
212 | altsd = get_iface_desc(host_iface); | |
213 | protocol = altsd->bInterfaceProtocol; | |
214 | ||
215 | if (!control_header) { | |
216 | snd_printk(KERN_ERR "cannot find UAC_HEADER\n"); | |
217 | return -EINVAL; | |
218 | } | |
219 | ||
220 | switch (protocol) { | |
a2acad82 CL |
221 | default: |
222 | snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n", | |
223 | protocol); | |
224 | /* fall through */ | |
225 | ||
e5779998 | 226 | case UAC_VERSION_1: { |
69da9bcb | 227 | struct uac1_ac_header_descriptor *h1 = control_header; |
e5779998 DM |
228 | |
229 | if (!h1->bInCollection) { | |
230 | snd_printk(KERN_INFO "skipping empty audio interface (v1)\n"); | |
231 | return -EINVAL; | |
232 | } | |
233 | ||
234 | if (h1->bLength < sizeof(*h1) + h1->bInCollection) { | |
235 | snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n"); | |
236 | return -EINVAL; | |
237 | } | |
238 | ||
239 | for (i = 0; i < h1->bInCollection; i++) | |
240 | snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); | |
241 | ||
242 | break; | |
243 | } | |
244 | ||
245 | case UAC_VERSION_2: { | |
e5779998 DM |
246 | struct usb_interface_assoc_descriptor *assoc = |
247 | usb_ifnum_to_if(dev, ctrlif)->intf_assoc; | |
248 | ||
249 | if (!assoc) { | |
250 | snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n"); | |
251 | return -EINVAL; | |
252 | } | |
253 | ||
e5779998 DM |
254 | for (i = 0; i < assoc->bInterfaceCount; i++) { |
255 | int intf = assoc->bFirstInterface + i; | |
256 | ||
257 | if (intf != ctrlif) | |
258 | snd_usb_create_stream(chip, ctrlif, intf); | |
259 | } | |
260 | ||
261 | break; | |
262 | } | |
e5779998 DM |
263 | } |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | /* | |
269 | * free the chip instance | |
270 | * | |
271 | * here we have to do not much, since pcm and controls are already freed | |
272 | * | |
273 | */ | |
274 | ||
275 | static int snd_usb_audio_free(struct snd_usb_audio *chip) | |
276 | { | |
277 | kfree(chip); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static int snd_usb_audio_dev_free(struct snd_device *device) | |
282 | { | |
283 | struct snd_usb_audio *chip = device->device_data; | |
284 | return snd_usb_audio_free(chip); | |
285 | } | |
286 | ||
3ffc1222 TI |
287 | static void remove_trailing_spaces(char *str) |
288 | { | |
289 | char *p; | |
290 | ||
291 | if (!*str) | |
292 | return; | |
293 | for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--) | |
294 | *p = 0; | |
295 | } | |
e5779998 DM |
296 | |
297 | /* | |
298 | * create a chip instance and set its names. | |
299 | */ | |
300 | static int snd_usb_audio_create(struct usb_device *dev, int idx, | |
301 | const struct snd_usb_audio_quirk *quirk, | |
302 | struct snd_usb_audio **rchip) | |
303 | { | |
304 | struct snd_card *card; | |
305 | struct snd_usb_audio *chip; | |
306 | int err, len; | |
307 | char component[14]; | |
308 | static struct snd_device_ops ops = { | |
309 | .dev_free = snd_usb_audio_dev_free, | |
310 | }; | |
311 | ||
312 | *rchip = NULL; | |
313 | ||
4f4e8f69 PZ |
314 | switch (snd_usb_get_speed(dev)) { |
315 | case USB_SPEED_LOW: | |
316 | case USB_SPEED_FULL: | |
317 | case USB_SPEED_HIGH: | |
318 | case USB_SPEED_SUPER: | |
319 | break; | |
320 | default: | |
e5779998 DM |
321 | snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev)); |
322 | return -ENXIO; | |
323 | } | |
324 | ||
325 | err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card); | |
326 | if (err < 0) { | |
327 | snd_printk(KERN_ERR "cannot create card instance %d\n", idx); | |
328 | return err; | |
329 | } | |
330 | ||
331 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
332 | if (! chip) { | |
333 | snd_card_free(card); | |
334 | return -ENOMEM; | |
335 | } | |
336 | ||
382225e6 | 337 | mutex_init(&chip->shutdown_mutex); |
e5779998 DM |
338 | chip->index = idx; |
339 | chip->dev = dev; | |
340 | chip->card = card; | |
341 | chip->setup = device_setup[idx]; | |
342 | chip->nrpacks = nrpacks; | |
343 | chip->async_unlink = async_unlink; | |
88a8516a | 344 | chip->probing = 1; |
e5779998 DM |
345 | |
346 | chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
347 | le16_to_cpu(dev->descriptor.idProduct)); | |
348 | INIT_LIST_HEAD(&chip->pcm_list); | |
349 | INIT_LIST_HEAD(&chip->midi_list); | |
350 | INIT_LIST_HEAD(&chip->mixer_list); | |
351 | ||
352 | if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { | |
353 | snd_usb_audio_free(chip); | |
354 | snd_card_free(card); | |
355 | return err; | |
356 | } | |
357 | ||
358 | strcpy(card->driver, "USB-Audio"); | |
359 | sprintf(component, "USB%04x:%04x", | |
360 | USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); | |
361 | snd_component_add(card, component); | |
362 | ||
363 | /* retrieve the device string as shortname */ | |
3ffc1222 | 364 | if (quirk && quirk->product_name && *quirk->product_name) { |
e5779998 DM |
365 | strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); |
366 | } else { | |
367 | if (!dev->descriptor.iProduct || | |
368 | usb_string(dev, dev->descriptor.iProduct, | |
369 | card->shortname, sizeof(card->shortname)) <= 0) { | |
370 | /* no name available from anywhere, so use ID */ | |
371 | sprintf(card->shortname, "USB Device %#04x:%#04x", | |
372 | USB_ID_VENDOR(chip->usb_id), | |
373 | USB_ID_PRODUCT(chip->usb_id)); | |
374 | } | |
375 | } | |
3ffc1222 | 376 | remove_trailing_spaces(card->shortname); |
e5779998 DM |
377 | |
378 | /* retrieve the vendor and device strings as longname */ | |
3ffc1222 | 379 | if (quirk && quirk->vendor_name && *quirk->vendor_name) { |
e5779998 DM |
380 | len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); |
381 | } else { | |
382 | if (dev->descriptor.iManufacturer) | |
383 | len = usb_string(dev, dev->descriptor.iManufacturer, | |
384 | card->longname, sizeof(card->longname)); | |
385 | else | |
386 | len = 0; | |
387 | /* we don't really care if there isn't any vendor string */ | |
388 | } | |
3ffc1222 TI |
389 | if (len > 0) { |
390 | remove_trailing_spaces(card->longname); | |
391 | if (*card->longname) | |
392 | strlcat(card->longname, " ", sizeof(card->longname)); | |
393 | } | |
e5779998 DM |
394 | |
395 | strlcat(card->longname, card->shortname, sizeof(card->longname)); | |
396 | ||
397 | len = strlcat(card->longname, " at ", sizeof(card->longname)); | |
398 | ||
399 | if (len < sizeof(card->longname)) | |
400 | usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); | |
401 | ||
4f4e8f69 PZ |
402 | switch (snd_usb_get_speed(dev)) { |
403 | case USB_SPEED_LOW: | |
404 | strlcat(card->longname, ", low speed", sizeof(card->longname)); | |
405 | break; | |
406 | case USB_SPEED_FULL: | |
407 | strlcat(card->longname, ", full speed", sizeof(card->longname)); | |
408 | break; | |
409 | case USB_SPEED_HIGH: | |
410 | strlcat(card->longname, ", high speed", sizeof(card->longname)); | |
411 | break; | |
412 | case USB_SPEED_SUPER: | |
413 | strlcat(card->longname, ", super speed", sizeof(card->longname)); | |
414 | break; | |
415 | default: | |
416 | break; | |
417 | } | |
e5779998 DM |
418 | |
419 | snd_usb_audio_create_proc(chip); | |
420 | ||
421 | *rchip = chip; | |
422 | return 0; | |
423 | } | |
424 | ||
425 | /* | |
426 | * probe the active usb device | |
427 | * | |
428 | * note that this can be called multiple times per a device, when it | |
429 | * includes multiple audio control interfaces. | |
430 | * | |
431 | * thus we check the usb device pointer and creates the card instance | |
432 | * only at the first time. the successive calls of this function will | |
433 | * append the pcm interface to the corresponding card. | |
434 | */ | |
435 | static void *snd_usb_audio_probe(struct usb_device *dev, | |
436 | struct usb_interface *intf, | |
437 | const struct usb_device_id *usb_id) | |
438 | { | |
439 | const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info; | |
440 | int i, err; | |
441 | struct snd_usb_audio *chip; | |
442 | struct usb_host_interface *alts; | |
443 | int ifnum; | |
444 | u32 id; | |
445 | ||
446 | alts = &intf->altsetting[0]; | |
447 | ifnum = get_iface_desc(alts)->bInterfaceNumber; | |
448 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), | |
449 | le16_to_cpu(dev->descriptor.idProduct)); | |
450 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) | |
451 | goto __err_val; | |
452 | ||
453 | if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0) | |
454 | goto __err_val; | |
455 | ||
456 | /* | |
457 | * found a config. now register to ALSA | |
458 | */ | |
459 | ||
460 | /* check whether it's already registered */ | |
461 | chip = NULL; | |
462 | mutex_lock(®ister_mutex); | |
463 | for (i = 0; i < SNDRV_CARDS; i++) { | |
464 | if (usb_chip[i] && usb_chip[i]->dev == dev) { | |
465 | if (usb_chip[i]->shutdown) { | |
466 | snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n"); | |
467 | goto __error; | |
468 | } | |
469 | chip = usb_chip[i]; | |
88a8516a | 470 | chip->probing = 1; |
e5779998 DM |
471 | break; |
472 | } | |
473 | } | |
474 | if (! chip) { | |
475 | /* it's a fresh one. | |
476 | * now look for an empty slot and create a new card instance | |
477 | */ | |
478 | for (i = 0; i < SNDRV_CARDS; i++) | |
479 | if (enable[i] && ! usb_chip[i] && | |
480 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && | |
481 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { | |
482 | if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) { | |
483 | goto __error; | |
484 | } | |
485 | snd_card_set_dev(chip->card, &intf->dev); | |
88a8516a | 486 | chip->pm_intf = intf; |
e5779998 DM |
487 | break; |
488 | } | |
489 | if (!chip) { | |
490 | printk(KERN_ERR "no available usb audio device\n"); | |
491 | goto __error; | |
492 | } | |
493 | } | |
494 | ||
495 | chip->txfr_quirk = 0; | |
496 | err = 1; /* continue */ | |
497 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { | |
498 | /* need some special handlings */ | |
499 | if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0) | |
500 | goto __error; | |
501 | } | |
502 | ||
7b6717e1 DM |
503 | /* |
504 | * For devices with more than one control interface, we assume the | |
505 | * first contains the audio controls. We might need a more specific | |
506 | * check here in the future. | |
507 | */ | |
508 | if (!chip->ctrl_intf) | |
509 | chip->ctrl_intf = alts; | |
79f920fb | 510 | |
e5779998 DM |
511 | if (err > 0) { |
512 | /* create normal USB audio interfaces */ | |
513 | if (snd_usb_create_streams(chip, ifnum) < 0 || | |
514 | snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) { | |
515 | goto __error; | |
516 | } | |
517 | } | |
518 | ||
519 | /* we are allowed to call snd_card_register() many times */ | |
520 | if (snd_card_register(chip->card) < 0) { | |
521 | goto __error; | |
522 | } | |
523 | ||
524 | usb_chip[chip->index] = chip; | |
525 | chip->num_interfaces++; | |
88a8516a | 526 | chip->probing = 0; |
e5779998 DM |
527 | mutex_unlock(®ister_mutex); |
528 | return chip; | |
529 | ||
530 | __error: | |
531 | if (chip && !chip->num_interfaces) | |
532 | snd_card_free(chip->card); | |
533 | mutex_unlock(®ister_mutex); | |
534 | __err_val: | |
535 | return NULL; | |
536 | } | |
537 | ||
538 | /* | |
539 | * we need to take care of counter, since disconnection can be called also | |
540 | * many times as well as usb_audio_probe(). | |
541 | */ | |
542 | static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr) | |
543 | { | |
544 | struct snd_usb_audio *chip; | |
545 | struct snd_card *card; | |
546 | struct list_head *p; | |
547 | ||
548 | if (ptr == (void *)-1L) | |
549 | return; | |
550 | ||
551 | chip = ptr; | |
552 | card = chip->card; | |
553 | mutex_lock(®ister_mutex); | |
382225e6 | 554 | mutex_lock(&chip->shutdown_mutex); |
e5779998 DM |
555 | chip->shutdown = 1; |
556 | chip->num_interfaces--; | |
557 | if (chip->num_interfaces <= 0) { | |
558 | snd_card_disconnect(card); | |
559 | /* release the pcm resources */ | |
560 | list_for_each(p, &chip->pcm_list) { | |
561 | snd_usb_stream_disconnect(p); | |
562 | } | |
563 | /* release the midi resources */ | |
564 | list_for_each(p, &chip->midi_list) { | |
565 | snd_usbmidi_disconnect(p); | |
566 | } | |
567 | /* release mixer resources */ | |
568 | list_for_each(p, &chip->mixer_list) { | |
569 | snd_usb_mixer_disconnect(p); | |
570 | } | |
571 | usb_chip[chip->index] = NULL; | |
382225e6 | 572 | mutex_unlock(&chip->shutdown_mutex); |
e5779998 DM |
573 | mutex_unlock(®ister_mutex); |
574 | snd_card_free_when_closed(card); | |
575 | } else { | |
382225e6 | 576 | mutex_unlock(&chip->shutdown_mutex); |
e5779998 DM |
577 | mutex_unlock(®ister_mutex); |
578 | } | |
579 | } | |
580 | ||
581 | /* | |
582 | * new 2.5 USB kernel API | |
583 | */ | |
584 | static int usb_audio_probe(struct usb_interface *intf, | |
585 | const struct usb_device_id *id) | |
586 | { | |
587 | void *chip; | |
588 | chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id); | |
589 | if (chip) { | |
590 | usb_set_intfdata(intf, chip); | |
591 | return 0; | |
592 | } else | |
593 | return -EIO; | |
594 | } | |
595 | ||
596 | static void usb_audio_disconnect(struct usb_interface *intf) | |
597 | { | |
598 | snd_usb_audio_disconnect(interface_to_usbdev(intf), | |
599 | usb_get_intfdata(intf)); | |
600 | } | |
601 | ||
602 | #ifdef CONFIG_PM | |
88a8516a ON |
603 | |
604 | int snd_usb_autoresume(struct snd_usb_audio *chip) | |
605 | { | |
606 | int err = -ENODEV; | |
607 | ||
608 | if (!chip->shutdown && !chip->probing) | |
609 | err = usb_autopm_get_interface(chip->pm_intf); | |
610 | ||
611 | return err; | |
612 | } | |
613 | ||
614 | void snd_usb_autosuspend(struct snd_usb_audio *chip) | |
615 | { | |
616 | if (!chip->shutdown && !chip->probing) | |
617 | usb_autopm_put_interface(chip->pm_intf); | |
618 | } | |
619 | ||
e5779998 DM |
620 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
621 | { | |
622 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
623 | struct list_head *p; | |
624 | struct snd_usb_stream *as; | |
edf7de31 | 625 | struct usb_mixer_interface *mixer; |
e5779998 DM |
626 | |
627 | if (chip == (void *)-1L) | |
628 | return 0; | |
629 | ||
88a8516a ON |
630 | if (!(message.event & PM_EVENT_AUTO)) { |
631 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); | |
632 | if (!chip->num_suspended_intf++) { | |
633 | list_for_each(p, &chip->pcm_list) { | |
634 | as = list_entry(p, struct snd_usb_stream, list); | |
635 | snd_pcm_suspend_all(as->pcm); | |
636 | } | |
637 | } | |
638 | } else { | |
639 | /* | |
640 | * otherwise we keep the rest of the system in the dark | |
641 | * to keep this transparent | |
642 | */ | |
643 | if (!chip->num_suspended_intf++) | |
644 | chip->autosuspended = 1; | |
e5779998 DM |
645 | } |
646 | ||
88a8516a ON |
647 | list_for_each_entry(mixer, &chip->mixer_list, list) |
648 | snd_usb_mixer_inactivate(mixer); | |
649 | ||
e5779998 DM |
650 | return 0; |
651 | } | |
652 | ||
653 | static int usb_audio_resume(struct usb_interface *intf) | |
654 | { | |
655 | struct snd_usb_audio *chip = usb_get_intfdata(intf); | |
edf7de31 | 656 | struct usb_mixer_interface *mixer; |
88a8516a | 657 | int err = 0; |
e5779998 DM |
658 | |
659 | if (chip == (void *)-1L) | |
660 | return 0; | |
661 | if (--chip->num_suspended_intf) | |
662 | return 0; | |
663 | /* | |
664 | * ALSA leaves material resumption to user space | |
edf7de31 | 665 | * we just notify and restart the mixers |
e5779998 | 666 | */ |
88a8516a ON |
667 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
668 | err = snd_usb_mixer_activate(mixer); | |
669 | if (err < 0) | |
670 | goto err_out; | |
671 | } | |
e5779998 | 672 | |
88a8516a ON |
673 | if (!chip->autosuspended) |
674 | snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); | |
675 | chip->autosuspended = 0; | |
e5779998 | 676 | |
88a8516a ON |
677 | err_out: |
678 | return err; | |
e5779998 | 679 | } |
6407d474 RD |
680 | #else |
681 | #define usb_audio_suspend NULL | |
682 | #define usb_audio_resume NULL | |
e5779998 DM |
683 | #endif /* CONFIG_PM */ |
684 | ||
685 | static struct usb_device_id usb_audio_ids [] = { | |
686 | #include "quirks-table.h" | |
687 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), | |
688 | .bInterfaceClass = USB_CLASS_AUDIO, | |
689 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, | |
690 | { } /* Terminating entry */ | |
691 | }; | |
692 | ||
693 | MODULE_DEVICE_TABLE (usb, usb_audio_ids); | |
694 | ||
695 | /* | |
696 | * entry point for linux usb interface | |
697 | */ | |
698 | ||
699 | static struct usb_driver usb_audio_driver = { | |
700 | .name = "snd-usb-audio", | |
701 | .probe = usb_audio_probe, | |
702 | .disconnect = usb_audio_disconnect, | |
703 | .suspend = usb_audio_suspend, | |
704 | .resume = usb_audio_resume, | |
705 | .id_table = usb_audio_ids, | |
88a8516a | 706 | .supports_autosuspend = 1, |
e5779998 DM |
707 | }; |
708 | ||
709 | static int __init snd_usb_audio_init(void) | |
710 | { | |
711 | if (nrpacks < 1 || nrpacks > MAX_PACKS) { | |
712 | printk(KERN_WARNING "invalid nrpacks value.\n"); | |
713 | return -EINVAL; | |
714 | } | |
715 | return usb_register(&usb_audio_driver); | |
716 | } | |
717 | ||
718 | static void __exit snd_usb_audio_cleanup(void) | |
719 | { | |
720 | usb_deregister(&usb_audio_driver); | |
721 | } | |
722 | ||
723 | module_init(snd_usb_audio_init); | |
724 | module_exit(snd_usb_audio_cleanup); |