1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * (Tentative) USB Audio Driver for ALSA |
4 | * |
5 | * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> |
6 | * |
7 | * Many codes borrowed from audio.c by |
8 | * Alan Cox (alan@lxorguk.ukuu.org.uk) |
9 | * Thomas Sailer (sailer@ife.ee.ethz.ch) |
10 | * |
11 | * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com> |
12 | * |
13 | * NOTES: |
14 | * |
15 | * - the linked URBs would be preferred but not used so far because of |
16 | * the instability of unlinking. |
17 | * - type II is not supported properly. there is no device which supports |
18 | * this type *correctly*. SB extigy looks as if it supports, but it's |
19 | * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream). |
20 | */ |
21 | |
22 | |
23 | #include <linux/bitops.h> |
24 | #include <linux/init.h> |
25 | #include <linux/list.h> |
26 | #include <linux/slab.h> |
27 | #include <linux/string.h> |
28 | #include <linux/ctype.h> |
29 | #include <linux/usb.h> |
30 | #include <linux/moduleparam.h> |
31 | #include <linux/mutex.h> |
32 | #include <linux/usb/audio.h> |
33 | #include <linux/usb/audio-v2.h> |
34 | #include <linux/usb/audio-v3.h> |
35 | #include <linux/module.h> |
36 | |
37 | #include <sound/control.h> |
38 | #include <sound/core.h> |
39 | #include <sound/info.h> |
40 | #include <sound/pcm.h> |
41 | #include <sound/pcm_params.h> |
42 | #include <sound/initval.h> |
43 | |
44 | #include "usbaudio.h" |
45 | #include "card.h" |
46 | #include "midi.h" |
47 | #include "midi2.h" |
48 | #include "mixer.h" |
49 | #include "proc.h" |
50 | #include "quirks.h" |
51 | #include "endpoint.h" |
52 | #include "helper.h" |
53 | #include "pcm.h" |
54 | #include "format.h" |
55 | #include "power.h" |
56 | #include "stream.h" |
57 | #include "media.h" |
58 | |
59 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>" ); |
60 | MODULE_DESCRIPTION("USB Audio" ); |
61 | MODULE_LICENSE("GPL" ); |
62 | |
63 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
64 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
65 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ |
66 | /* Vendor/product IDs for this card */ |
67 | static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; |
68 | static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; |
69 | static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ |
70 | static bool ignore_ctl_error; |
71 | static bool autoclock = true; |
72 | static bool lowlatency = true; |
73 | static char *quirk_alias[SNDRV_CARDS]; |
74 | static char *delayed_register[SNDRV_CARDS]; |
75 | static bool implicit_fb[SNDRV_CARDS]; |
76 | static unsigned int quirk_flags[SNDRV_CARDS]; |
77 | |
78 | bool snd_usb_use_vmalloc = true; |
79 | bool snd_usb_skip_validation; |
80 | |
81 | module_param_array(index, int, NULL, 0444); |
82 | MODULE_PARM_DESC(index, "Index value for the USB audio adapter." ); |
83 | module_param_array(id, charp, NULL, 0444); |
84 | MODULE_PARM_DESC(id, "ID string for the USB audio adapter." ); |
85 | module_param_array(enable, bool, NULL, 0444); |
86 | MODULE_PARM_DESC(enable, "Enable USB audio adapter." ); |
87 | module_param_array(vid, int, NULL, 0444); |
88 | MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device." ); |
89 | module_param_array(pid, int, NULL, 0444); |
90 | MODULE_PARM_DESC(pid, "Product ID for the USB audio device." ); |
91 | module_param_array(device_setup, int, NULL, 0444); |
92 | MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)." ); |
93 | module_param(ignore_ctl_error, bool, 0444); |
94 | MODULE_PARM_DESC(ignore_ctl_error, |
95 | "Ignore errors from USB controller for mixer interfaces." ); |
96 | module_param(autoclock, bool, 0444); |
97 | MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)." ); |
98 | module_param(lowlatency, bool, 0444); |
99 | MODULE_PARM_DESC(lowlatency, "Enable low latency playback (default: yes)." ); |
100 | module_param_array(quirk_alias, charp, NULL, 0444); |
101 | MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef." ); |
102 | module_param_array(delayed_register, charp, NULL, 0444); |
103 | MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4." ); |
104 | module_param_array(implicit_fb, bool, NULL, 0444); |
105 | MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode." ); |
106 | module_param_array(quirk_flags, uint, NULL, 0444); |
107 | MODULE_PARM_DESC(quirk_flags, "Driver quirk bit flags." ); |
108 | module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444); |
109 | MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes)." ); |
110 | module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444); |
111 | MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no)." ); |
112 | |
113 | /* |
114 | * we keep the snd_usb_audio_t instances by ourselves for merging |
115 | * the all interfaces on the same card as one sound device. |
116 | */ |
117 | |
118 | static DEFINE_MUTEX(register_mutex); |
119 | static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; |
120 | static struct usb_driver usb_audio_driver; |
121 | |
122 | /* |
123 | * disconnect streams |
124 | * called from usb_audio_disconnect() |
125 | */ |
126 | static void snd_usb_stream_disconnect(struct snd_usb_stream *as) |
127 | { |
128 | int idx; |
129 | struct snd_usb_substream *subs; |
130 | |
131 | for (idx = 0; idx < 2; idx++) { |
132 | subs = &as->substream[idx]; |
133 | if (!subs->num_formats) |
134 | continue; |
135 | subs->data_endpoint = NULL; |
136 | subs->sync_endpoint = NULL; |
137 | } |
138 | } |
139 | |
140 | static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) |
141 | { |
142 | struct usb_device *dev = chip->dev; |
143 | struct usb_host_interface *alts; |
144 | struct usb_interface_descriptor *altsd; |
145 | struct usb_interface *iface = usb_ifnum_to_if(dev, ifnum: interface); |
146 | |
147 | if (!iface) { |
148 | dev_err(&dev->dev, "%u:%d : does not exist\n" , |
149 | ctrlif, interface); |
150 | return -EINVAL; |
151 | } |
152 | |
153 | alts = &iface->altsetting[0]; |
154 | altsd = get_iface_desc(alts); |
155 | |
156 | /* |
157 | * Android with both accessory and audio interfaces enabled gets the |
158 | * interface numbers wrong. |
159 | */ |
160 | if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || |
161 | chip->usb_id == USB_ID(0x18d1, 0x2d05)) && |
162 | interface == 0 && |
163 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && |
164 | altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { |
165 | interface = 2; |
166 | iface = usb_ifnum_to_if(dev, ifnum: interface); |
167 | if (!iface) |
168 | return -EINVAL; |
169 | alts = &iface->altsetting[0]; |
170 | altsd = get_iface_desc(alts); |
171 | } |
172 | |
173 | if (usb_interface_claimed(iface)) { |
174 | dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n" , |
175 | ctrlif, interface); |
176 | return -EINVAL; |
177 | } |
178 | |
179 | if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || |
180 | altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && |
181 | altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { |
182 | int err = snd_usb_midi_v2_create(chip, iface, NULL, |
183 | usb_id: chip->usb_id); |
184 | if (err < 0) { |
185 | dev_err(&dev->dev, |
186 | "%u:%d: cannot create sequencer device\n" , |
187 | ctrlif, interface); |
188 | return -EINVAL; |
189 | } |
190 | return usb_driver_claim_interface(driver: &usb_audio_driver, iface, |
191 | USB_AUDIO_IFACE_UNUSED); |
192 | } |
193 | |
194 | if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && |
195 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || |
196 | altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { |
197 | dev_dbg(&dev->dev, |
198 | "%u:%d: skipping non-supported interface %d\n" , |
199 | ctrlif, interface, altsd->bInterfaceClass); |
200 | /* skip non-supported classes */ |
201 | return -EINVAL; |
202 | } |
203 | |
204 | if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { |
205 | dev_err(&dev->dev, "low speed audio streaming not supported\n" ); |
206 | return -EINVAL; |
207 | } |
208 | |
209 | if (! snd_usb_parse_audio_interface(chip, iface_no: interface)) { |
210 | usb_set_interface(dev, ifnum: interface, alternate: 0); /* reset the current interface */ |
211 | return usb_driver_claim_interface(driver: &usb_audio_driver, iface, |
212 | USB_AUDIO_IFACE_UNUSED); |
213 | } |
214 | |
215 | return 0; |
216 | } |
217 | |
218 | /* |
219 | * parse audio control descriptor and create pcm/midi streams |
220 | */ |
221 | static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) |
222 | { |
223 | struct usb_device *dev = chip->dev; |
224 | struct usb_host_interface *host_iface; |
225 | struct usb_interface_descriptor *altsd; |
226 | int i, protocol; |
227 | |
228 | /* find audiocontrol interface */ |
229 | host_iface = &usb_ifnum_to_if(dev, ifnum: ctrlif)->altsetting[0]; |
230 | altsd = get_iface_desc(host_iface); |
231 | protocol = altsd->bInterfaceProtocol; |
232 | |
233 | switch (protocol) { |
234 | default: |
235 | dev_warn(&dev->dev, |
236 | "unknown interface protocol %#02x, assuming v1\n" , |
237 | protocol); |
238 | fallthrough; |
239 | |
240 | case UAC_VERSION_1: { |
241 | struct uac1_ac_header_descriptor *h1; |
242 | int rest_bytes; |
243 | |
244 | h1 = snd_usb_find_csint_desc(descstart: host_iface->extra, |
245 | desclen: host_iface->extralen, |
246 | NULL, UAC_HEADER); |
247 | if (!h1 || h1->bLength < sizeof(*h1)) { |
248 | dev_err(&dev->dev, "cannot find UAC_HEADER\n" ); |
249 | return -EINVAL; |
250 | } |
251 | |
252 | rest_bytes = (void *)(host_iface->extra + |
253 | host_iface->extralen) - (void *)h1; |
254 | |
255 | /* just to be sure -- this shouldn't hit at all */ |
256 | if (rest_bytes <= 0) { |
257 | dev_err(&dev->dev, "invalid control header\n" ); |
258 | return -EINVAL; |
259 | } |
260 | |
261 | if (rest_bytes < sizeof(*h1)) { |
262 | dev_err(&dev->dev, "too short v1 buffer descriptor\n" ); |
263 | return -EINVAL; |
264 | } |
265 | |
266 | if (!h1->bInCollection) { |
267 | dev_info(&dev->dev, "skipping empty audio interface (v1)\n" ); |
268 | return -EINVAL; |
269 | } |
270 | |
271 | if (rest_bytes < h1->bLength) { |
272 | dev_err(&dev->dev, "invalid buffer length (v1)\n" ); |
273 | return -EINVAL; |
274 | } |
275 | |
276 | if (h1->bLength < sizeof(*h1) + h1->bInCollection) { |
277 | dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n" ); |
278 | return -EINVAL; |
279 | } |
280 | |
281 | for (i = 0; i < h1->bInCollection; i++) |
282 | snd_usb_create_stream(chip, ctrlif, interface: h1->baInterfaceNr[i]); |
283 | |
284 | break; |
285 | } |
286 | |
287 | case UAC_VERSION_2: |
288 | case UAC_VERSION_3: { |
289 | struct usb_interface_assoc_descriptor *assoc = |
290 | usb_ifnum_to_if(dev, ifnum: ctrlif)->intf_assoc; |
291 | |
292 | if (!assoc) { |
293 | /* |
294 | * Firmware writers cannot count to three. So to find |
295 | * the IAD on the NuForce UDH-100, also check the next |
296 | * interface. |
297 | */ |
298 | struct usb_interface *iface = |
299 | usb_ifnum_to_if(dev, ifnum: ctrlif + 1); |
300 | if (iface && |
301 | iface->intf_assoc && |
302 | iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && |
303 | iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) |
304 | assoc = iface->intf_assoc; |
305 | } |
306 | |
307 | if (!assoc) { |
308 | dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n" ); |
309 | return -EINVAL; |
310 | } |
311 | |
312 | if (protocol == UAC_VERSION_3) { |
313 | int badd = assoc->bFunctionSubClass; |
314 | |
315 | if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 && |
316 | (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO || |
317 | badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) { |
318 | dev_err(&dev->dev, |
319 | "Unsupported UAC3 BADD profile\n" ); |
320 | return -EINVAL; |
321 | } |
322 | |
323 | chip->badd_profile = badd; |
324 | } |
325 | |
326 | for (i = 0; i < assoc->bInterfaceCount; i++) { |
327 | int intf = assoc->bFirstInterface + i; |
328 | |
329 | if (intf != ctrlif) |
330 | snd_usb_create_stream(chip, ctrlif, interface: intf); |
331 | } |
332 | |
333 | break; |
334 | } |
335 | } |
336 | |
337 | return 0; |
338 | } |
339 | |
340 | /* |
341 | * Profile name preset table |
342 | */ |
343 | struct usb_audio_device_name { |
344 | u32 id; |
345 | const char *vendor_name; |
346 | const char *product_name; |
347 | const char *profile_name; /* override card->longname */ |
348 | }; |
349 | |
350 | #define PROFILE_NAME(vid, pid, vendor, product, profile) \ |
351 | { .id = USB_ID(vid, pid), .vendor_name = (vendor), \ |
352 | .product_name = (product), .profile_name = (profile) } |
353 | #define DEVICE_NAME(vid, pid, vendor, product) \ |
354 | PROFILE_NAME(vid, pid, vendor, product, NULL) |
355 | |
356 | /* vendor/product and profile name presets, sorted in device id order */ |
357 | static const struct usb_audio_device_name usb_audio_names[] = { |
358 | /* HP Thunderbolt Dock Audio Headset */ |
359 | PROFILE_NAME(0x03f0, 0x0269, "HP" , "Thunderbolt Dock Audio Headset" , |
360 | "HP-Thunderbolt-Dock-Audio-Headset" ), |
361 | /* HP Thunderbolt Dock Audio Module */ |
362 | PROFILE_NAME(0x03f0, 0x0567, "HP" , "Thunderbolt Dock Audio Module" , |
363 | "HP-Thunderbolt-Dock-Audio-Module" ), |
364 | |
365 | /* Two entries for Gigabyte TRX40 Aorus Master: |
366 | * TRX40 Aorus Master has two USB-audio devices, one for the front |
367 | * headphone with ESS SABRE9218 DAC chip, while another for the rest |
368 | * I/O (the rear panel and the front mic) with Realtek ALC1220-VB. |
369 | * Here we provide two distinct names for making UCM profiles easier. |
370 | */ |
371 | PROFILE_NAME(0x0414, 0xa000, "Gigabyte" , "Aorus Master Front Headphone" , |
372 | "Gigabyte-Aorus-Master-Front-Headphone" ), |
373 | PROFILE_NAME(0x0414, 0xa001, "Gigabyte" , "Aorus Master Main Audio" , |
374 | "Gigabyte-Aorus-Master-Main-Audio" ), |
375 | |
376 | /* Gigabyte TRX40 Aorus Pro WiFi */ |
377 | PROFILE_NAME(0x0414, 0xa002, |
378 | "Realtek" , "ALC1220-VB-DT" , "Realtek-ALC1220-VB-Desktop" ), |
379 | |
380 | /* Creative/E-Mu devices */ |
381 | DEVICE_NAME(0x041e, 0x3010, "Creative Labs" , "Sound Blaster MP3+" ), |
382 | /* Creative/Toshiba Multimedia Center SB-0500 */ |
383 | DEVICE_NAME(0x041e, 0x3048, "Toshiba" , "SB-0500" ), |
384 | |
385 | DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc." , "QuickCam Pro 9000" ), |
386 | |
387 | DEVICE_NAME(0x05e1, 0x0408, "Syntek" , "STK1160" ), |
388 | DEVICE_NAME(0x05e1, 0x0480, "Hauppauge" , "Woodbury" ), |
389 | |
390 | /* ASUS ROG Zenith II: this machine has also two devices, one for |
391 | * the front headphone and another for the rest |
392 | */ |
393 | PROFILE_NAME(0x0b05, 0x1915, "ASUS" , "Zenith II Front Headphone" , |
394 | "Zenith-II-Front-Headphone" ), |
395 | PROFILE_NAME(0x0b05, 0x1916, "ASUS" , "Zenith II Main Audio" , |
396 | "Zenith-II-Main-Audio" ), |
397 | |
398 | /* ASUS ROG Strix */ |
399 | PROFILE_NAME(0x0b05, 0x1917, |
400 | "Realtek" , "ALC1220-VB-DT" , "Realtek-ALC1220-VB-Desktop" ), |
401 | /* ASUS PRIME TRX40 PRO-S */ |
402 | PROFILE_NAME(0x0b05, 0x1918, |
403 | "Realtek" , "ALC1220-VB-DT" , "Realtek-ALC1220-VB-Desktop" ), |
404 | |
405 | /* Dell WD15 Dock */ |
406 | PROFILE_NAME(0x0bda, 0x4014, "Dell" , "WD15 Dock" , "Dell-WD15-Dock" ), |
407 | /* Dell WD19 Dock */ |
408 | PROFILE_NAME(0x0bda, 0x402e, "Dell" , "WD19 Dock" , "Dell-WD15-Dock" ), |
409 | |
410 | DEVICE_NAME(0x0ccd, 0x0028, "TerraTec" , "Aureon5.1MkII" ), |
411 | |
412 | /* |
413 | * The original product_name is "USB Sound Device", however this name |
414 | * is also used by the CM106 based cards, so make it unique. |
415 | */ |
416 | DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D" ), |
417 | DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII" ), |
418 | |
419 | /* MSI TRX40 Creator */ |
420 | PROFILE_NAME(0x0db0, 0x0d64, |
421 | "Realtek" , "ALC1220-VB-DT" , "Realtek-ALC1220-VB-Desktop" ), |
422 | /* MSI TRX40 */ |
423 | PROFILE_NAME(0x0db0, 0x543d, |
424 | "Realtek" , "ALC1220-VB-DT" , "Realtek-ALC1220-VB-Desktop" ), |
425 | |
426 | DEVICE_NAME(0x0fd9, 0x0008, "Hauppauge" , "HVR-950Q" ), |
427 | |
428 | /* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */ |
429 | DEVICE_NAME(0x103d, 0x0100, "Stanton" , "ScratchAmp" ), |
430 | DEVICE_NAME(0x103d, 0x0101, "Stanton" , "ScratchAmp" ), |
431 | |
432 | /* aka. Serato Scratch Live DJ Box */ |
433 | DEVICE_NAME(0x13e5, 0x0001, "Rane" , "SL-1" ), |
434 | |
435 | /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */ |
436 | PROFILE_NAME(0x17aa, 0x1046, "Lenovo" , "ThinkStation P620 Rear" , |
437 | "Lenovo-ThinkStation-P620-Rear" ), |
438 | /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */ |
439 | PROFILE_NAME(0x17aa, 0x104d, "Lenovo" , "ThinkStation P620 Main" , |
440 | "Lenovo-ThinkStation-P620-Main" ), |
441 | |
442 | /* Asrock TRX40 Creator */ |
443 | PROFILE_NAME(0x26ce, 0x0a01, |
444 | "Realtek" , "ALC1220-VB-DT" , "Realtek-ALC1220-VB-Desktop" ), |
445 | |
446 | DEVICE_NAME(0x2040, 0x7200, "Hauppauge" , "HVR-950Q" ), |
447 | DEVICE_NAME(0x2040, 0x7201, "Hauppauge" , "HVR-950Q-MXL" ), |
448 | DEVICE_NAME(0x2040, 0x7210, "Hauppauge" , "HVR-950Q" ), |
449 | DEVICE_NAME(0x2040, 0x7211, "Hauppauge" , "HVR-950Q-MXL" ), |
450 | DEVICE_NAME(0x2040, 0x7213, "Hauppauge" , "HVR-950Q" ), |
451 | DEVICE_NAME(0x2040, 0x7217, "Hauppauge" , "HVR-950Q" ), |
452 | DEVICE_NAME(0x2040, 0x721b, "Hauppauge" , "HVR-950Q" ), |
453 | DEVICE_NAME(0x2040, 0x721e, "Hauppauge" , "HVR-950Q" ), |
454 | DEVICE_NAME(0x2040, 0x721f, "Hauppauge" , "HVR-950Q" ), |
455 | DEVICE_NAME(0x2040, 0x7240, "Hauppauge" , "HVR-850" ), |
456 | DEVICE_NAME(0x2040, 0x7260, "Hauppauge" , "HVR-950Q" ), |
457 | DEVICE_NAME(0x2040, 0x7270, "Hauppauge" , "HVR-950Q" ), |
458 | DEVICE_NAME(0x2040, 0x7280, "Hauppauge" , "HVR-950Q" ), |
459 | DEVICE_NAME(0x2040, 0x7281, "Hauppauge" , "HVR-950Q-MXL" ), |
460 | DEVICE_NAME(0x2040, 0x8200, "Hauppauge" , "Woodbury" ), |
461 | |
462 | { } /* terminator */ |
463 | }; |
464 | |
465 | static const struct usb_audio_device_name * |
466 | lookup_device_name(u32 id) |
467 | { |
468 | static const struct usb_audio_device_name *p; |
469 | |
470 | for (p = usb_audio_names; p->id; p++) |
471 | if (p->id == id) |
472 | return p; |
473 | return NULL; |
474 | } |
475 | |
476 | /* |
477 | * free the chip instance |
478 | * |
479 | * here we have to do not much, since pcm and controls are already freed |
480 | * |
481 | */ |
482 | |
483 | static void snd_usb_audio_free(struct snd_card *card) |
484 | { |
485 | struct snd_usb_audio *chip = card->private_data; |
486 | |
487 | snd_usb_endpoint_free_all(chip); |
488 | snd_usb_midi_v2_free_all(chip); |
489 | |
490 | mutex_destroy(lock: &chip->mutex); |
491 | if (!atomic_read(v: &chip->shutdown)) |
492 | dev_set_drvdata(dev: &chip->dev->dev, NULL); |
493 | } |
494 | |
495 | static void usb_audio_make_shortname(struct usb_device *dev, |
496 | struct snd_usb_audio *chip, |
497 | const struct snd_usb_audio_quirk *quirk) |
498 | { |
499 | struct snd_card *card = chip->card; |
500 | const struct usb_audio_device_name *preset; |
501 | const char *s = NULL; |
502 | |
503 | preset = lookup_device_name(id: chip->usb_id); |
504 | if (preset && preset->product_name) |
505 | s = preset->product_name; |
506 | else if (quirk && quirk->product_name) |
507 | s = quirk->product_name; |
508 | if (s && *s) { |
509 | strscpy(p: card->shortname, q: s, size: sizeof(card->shortname)); |
510 | return; |
511 | } |
512 | |
513 | /* retrieve the device string as shortname */ |
514 | if (!dev->descriptor.iProduct || |
515 | usb_string(dev, index: dev->descriptor.iProduct, |
516 | buf: card->shortname, size: sizeof(card->shortname)) <= 0) { |
517 | /* no name available from anywhere, so use ID */ |
518 | sprintf(buf: card->shortname, fmt: "USB Device %#04x:%#04x" , |
519 | USB_ID_VENDOR(chip->usb_id), |
520 | USB_ID_PRODUCT(chip->usb_id)); |
521 | } |
522 | |
523 | strim(card->shortname); |
524 | } |
525 | |
526 | static void usb_audio_make_longname(struct usb_device *dev, |
527 | struct snd_usb_audio *chip, |
528 | const struct snd_usb_audio_quirk *quirk) |
529 | { |
530 | struct snd_card *card = chip->card; |
531 | const struct usb_audio_device_name *preset; |
532 | const char *s = NULL; |
533 | int len; |
534 | |
535 | preset = lookup_device_name(id: chip->usb_id); |
536 | |
537 | /* shortcut - if any pre-defined string is given, use it */ |
538 | if (preset && preset->profile_name) |
539 | s = preset->profile_name; |
540 | if (s && *s) { |
541 | strscpy(p: card->longname, q: s, size: sizeof(card->longname)); |
542 | return; |
543 | } |
544 | |
545 | if (preset && preset->vendor_name) |
546 | s = preset->vendor_name; |
547 | else if (quirk && quirk->vendor_name) |
548 | s = quirk->vendor_name; |
549 | *card->longname = 0; |
550 | if (s && *s) { |
551 | strscpy(p: card->longname, q: s, size: sizeof(card->longname)); |
552 | } else { |
553 | /* retrieve the vendor and device strings as longname */ |
554 | if (dev->descriptor.iManufacturer) |
555 | usb_string(dev, index: dev->descriptor.iManufacturer, |
556 | buf: card->longname, size: sizeof(card->longname)); |
557 | /* we don't really care if there isn't any vendor string */ |
558 | } |
559 | if (*card->longname) { |
560 | strim(card->longname); |
561 | if (*card->longname) |
562 | strlcat(p: card->longname, q: " " , avail: sizeof(card->longname)); |
563 | } |
564 | |
565 | strlcat(p: card->longname, q: card->shortname, avail: sizeof(card->longname)); |
566 | |
567 | len = strlcat(p: card->longname, q: " at " , avail: sizeof(card->longname)); |
568 | |
569 | if (len < sizeof(card->longname)) |
570 | usb_make_path(dev, buf: card->longname + len, size: sizeof(card->longname) - len); |
571 | |
572 | switch (snd_usb_get_speed(dev)) { |
573 | case USB_SPEED_LOW: |
574 | strlcat(p: card->longname, q: ", low speed" , avail: sizeof(card->longname)); |
575 | break; |
576 | case USB_SPEED_FULL: |
577 | strlcat(p: card->longname, q: ", full speed" , avail: sizeof(card->longname)); |
578 | break; |
579 | case USB_SPEED_HIGH: |
580 | strlcat(p: card->longname, q: ", high speed" , avail: sizeof(card->longname)); |
581 | break; |
582 | case USB_SPEED_SUPER: |
583 | strlcat(p: card->longname, q: ", super speed" , avail: sizeof(card->longname)); |
584 | break; |
585 | case USB_SPEED_SUPER_PLUS: |
586 | strlcat(p: card->longname, q: ", super speed plus" , avail: sizeof(card->longname)); |
587 | break; |
588 | default: |
589 | break; |
590 | } |
591 | } |
592 | |
593 | /* |
594 | * create a chip instance and set its names. |
595 | */ |
596 | static int snd_usb_audio_create(struct usb_interface *intf, |
597 | struct usb_device *dev, int idx, |
598 | const struct snd_usb_audio_quirk *quirk, |
599 | unsigned int usb_id, |
600 | struct snd_usb_audio **rchip) |
601 | { |
602 | struct snd_card *card; |
603 | struct snd_usb_audio *chip; |
604 | int err; |
605 | char component[14]; |
606 | |
607 | *rchip = NULL; |
608 | |
609 | switch (snd_usb_get_speed(dev)) { |
610 | case USB_SPEED_LOW: |
611 | case USB_SPEED_FULL: |
612 | case USB_SPEED_HIGH: |
613 | case USB_SPEED_SUPER: |
614 | case USB_SPEED_SUPER_PLUS: |
615 | break; |
616 | default: |
617 | dev_err(&dev->dev, "unknown device speed %d\n" , snd_usb_get_speed(dev)); |
618 | return -ENXIO; |
619 | } |
620 | |
621 | err = snd_card_new(parent: &intf->dev, idx: index[idx], xid: id[idx], THIS_MODULE, |
622 | extra_size: sizeof(*chip), card_ret: &card); |
623 | if (err < 0) { |
624 | dev_err(&dev->dev, "cannot create card instance %d\n" , idx); |
625 | return err; |
626 | } |
627 | |
628 | chip = card->private_data; |
629 | mutex_init(&chip->mutex); |
630 | init_waitqueue_head(&chip->shutdown_wait); |
631 | chip->index = idx; |
632 | chip->dev = dev; |
633 | chip->card = card; |
634 | chip->setup = device_setup[idx]; |
635 | chip->generic_implicit_fb = implicit_fb[idx]; |
636 | chip->autoclock = autoclock; |
637 | chip->lowlatency = lowlatency; |
638 | atomic_set(v: &chip->active, i: 1); /* avoid autopm during probing */ |
639 | atomic_set(v: &chip->usage_count, i: 0); |
640 | atomic_set(v: &chip->shutdown, i: 0); |
641 | |
642 | chip->usb_id = usb_id; |
643 | INIT_LIST_HEAD(list: &chip->pcm_list); |
644 | INIT_LIST_HEAD(list: &chip->ep_list); |
645 | INIT_LIST_HEAD(list: &chip->iface_ref_list); |
646 | INIT_LIST_HEAD(list: &chip->clock_ref_list); |
647 | INIT_LIST_HEAD(list: &chip->midi_list); |
648 | INIT_LIST_HEAD(list: &chip->midi_v2_list); |
649 | INIT_LIST_HEAD(list: &chip->mixer_list); |
650 | |
651 | if (quirk_flags[idx]) |
652 | chip->quirk_flags = quirk_flags[idx]; |
653 | else |
654 | snd_usb_init_quirk_flags(chip); |
655 | |
656 | card->private_free = snd_usb_audio_free; |
657 | |
658 | strcpy(p: card->driver, q: "USB-Audio" ); |
659 | sprintf(buf: component, fmt: "USB%04x:%04x" , |
660 | USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); |
661 | snd_component_add(card, component); |
662 | |
663 | usb_audio_make_shortname(dev, chip, quirk); |
664 | usb_audio_make_longname(dev, chip, quirk); |
665 | |
666 | snd_usb_audio_create_proc(chip); |
667 | |
668 | *rchip = chip; |
669 | return 0; |
670 | } |
671 | |
672 | /* look for a matching quirk alias id */ |
673 | static bool get_alias_id(struct usb_device *dev, unsigned int *id) |
674 | { |
675 | int i; |
676 | unsigned int src, dst; |
677 | |
678 | for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { |
679 | if (!quirk_alias[i] || |
680 | sscanf(quirk_alias[i], "%x:%x" , &src, &dst) != 2 || |
681 | src != *id) |
682 | continue; |
683 | dev_info(&dev->dev, |
684 | "device (%04x:%04x): applying quirk alias %04x:%04x\n" , |
685 | USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), |
686 | USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); |
687 | *id = dst; |
688 | return true; |
689 | } |
690 | |
691 | return false; |
692 | } |
693 | |
694 | static int check_delayed_register_option(struct snd_usb_audio *chip) |
695 | { |
696 | int i; |
697 | unsigned int id, inum; |
698 | |
699 | for (i = 0; i < ARRAY_SIZE(delayed_register); i++) { |
700 | if (delayed_register[i] && |
701 | sscanf(delayed_register[i], "%x:%x" , &id, &inum) == 2 && |
702 | id == chip->usb_id) |
703 | return inum; |
704 | } |
705 | |
706 | return -1; |
707 | } |
708 | |
709 | static const struct usb_device_id usb_audio_ids[]; /* defined below */ |
710 | |
711 | /* look for the last interface that matches with our ids and remember it */ |
712 | static void find_last_interface(struct snd_usb_audio *chip) |
713 | { |
714 | struct usb_host_config *config = chip->dev->actconfig; |
715 | struct usb_interface *intf; |
716 | int i; |
717 | |
718 | if (!config) |
719 | return; |
720 | for (i = 0; i < config->desc.bNumInterfaces; i++) { |
721 | intf = config->interface[i]; |
722 | if (usb_match_id(interface: intf, id: usb_audio_ids)) |
723 | chip->last_iface = intf->altsetting[0].desc.bInterfaceNumber; |
724 | } |
725 | usb_audio_dbg(chip, "Found last interface = %d\n" , chip->last_iface); |
726 | } |
727 | |
728 | /* look for the corresponding quirk */ |
729 | static const struct snd_usb_audio_quirk * |
730 | get_alias_quirk(struct usb_device *dev, unsigned int id) |
731 | { |
732 | const struct usb_device_id *p; |
733 | |
734 | for (p = usb_audio_ids; p->match_flags; p++) { |
735 | /* FIXME: this checks only vendor:product pair in the list */ |
736 | if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == |
737 | USB_DEVICE_ID_MATCH_DEVICE && |
738 | p->idVendor == USB_ID_VENDOR(id) && |
739 | p->idProduct == USB_ID_PRODUCT(id)) |
740 | return (const struct snd_usb_audio_quirk *)p->driver_info; |
741 | } |
742 | |
743 | return NULL; |
744 | } |
745 | |
746 | /* register card if we reach to the last interface or to the specified |
747 | * one given via option |
748 | */ |
749 | static int try_to_register_card(struct snd_usb_audio *chip, int ifnum) |
750 | { |
751 | if (check_delayed_register_option(chip) == ifnum || |
752 | chip->last_iface == ifnum || |
753 | usb_interface_claimed(iface: usb_ifnum_to_if(dev: chip->dev, ifnum: chip->last_iface))) |
754 | return snd_card_register(card: chip->card); |
755 | return 0; |
756 | } |
757 | |
758 | /* |
759 | * probe the active usb device |
760 | * |
761 | * note that this can be called multiple times per a device, when it |
762 | * includes multiple audio control interfaces. |
763 | * |
764 | * thus we check the usb device pointer and creates the card instance |
765 | * only at the first time. the successive calls of this function will |
766 | * append the pcm interface to the corresponding card. |
767 | */ |
768 | static int usb_audio_probe(struct usb_interface *intf, |
769 | const struct usb_device_id *usb_id) |
770 | { |
771 | struct usb_device *dev = interface_to_usbdev(intf); |
772 | const struct snd_usb_audio_quirk *quirk = |
773 | (const struct snd_usb_audio_quirk *)usb_id->driver_info; |
774 | struct snd_usb_audio *chip; |
775 | int i, err; |
776 | struct usb_host_interface *alts; |
777 | int ifnum; |
778 | u32 id; |
779 | |
780 | alts = &intf->altsetting[0]; |
781 | ifnum = get_iface_desc(alts)->bInterfaceNumber; |
782 | id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), |
783 | le16_to_cpu(dev->descriptor.idProduct)); |
784 | if (get_alias_id(dev, id: &id)) |
785 | quirk = get_alias_quirk(dev, id); |
786 | if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) |
787 | return -ENXIO; |
788 | if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE) |
789 | return -ENODEV; |
790 | |
791 | err = snd_usb_apply_boot_quirk(dev, intf, quirk, usb_id: id); |
792 | if (err < 0) |
793 | return err; |
794 | |
795 | /* |
796 | * found a config. now register to ALSA |
797 | */ |
798 | |
799 | /* check whether it's already registered */ |
800 | chip = NULL; |
801 | mutex_lock(®ister_mutex); |
802 | for (i = 0; i < SNDRV_CARDS; i++) { |
803 | if (usb_chip[i] && usb_chip[i]->dev == dev) { |
804 | if (atomic_read(v: &usb_chip[i]->shutdown)) { |
805 | dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n" ); |
806 | err = -EIO; |
807 | goto __error; |
808 | } |
809 | chip = usb_chip[i]; |
810 | atomic_inc(v: &chip->active); /* avoid autopm */ |
811 | break; |
812 | } |
813 | } |
814 | if (! chip) { |
815 | err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, usb_id: id); |
816 | if (err < 0) |
817 | goto __error; |
818 | |
819 | /* it's a fresh one. |
820 | * now look for an empty slot and create a new card instance |
821 | */ |
822 | for (i = 0; i < SNDRV_CARDS; i++) |
823 | if (!usb_chip[i] && |
824 | (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && |
825 | (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { |
826 | if (enable[i]) { |
827 | err = snd_usb_audio_create(intf, dev, idx: i, quirk, |
828 | usb_id: id, rchip: &chip); |
829 | if (err < 0) |
830 | goto __error; |
831 | break; |
832 | } else if (vid[i] != -1 || pid[i] != -1) { |
833 | dev_info(&dev->dev, |
834 | "device (%04x:%04x) is disabled\n" , |
835 | USB_ID_VENDOR(id), |
836 | USB_ID_PRODUCT(id)); |
837 | err = -ENOENT; |
838 | goto __error; |
839 | } |
840 | } |
841 | if (!chip) { |
842 | dev_err(&dev->dev, "no available usb audio device\n" ); |
843 | err = -ENODEV; |
844 | goto __error; |
845 | } |
846 | find_last_interface(chip); |
847 | } |
848 | |
849 | if (chip->num_interfaces >= MAX_CARD_INTERFACES) { |
850 | dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n" ); |
851 | err = -EINVAL; |
852 | goto __error; |
853 | } |
854 | |
855 | dev_set_drvdata(dev: &dev->dev, data: chip); |
856 | |
857 | if (ignore_ctl_error) |
858 | chip->quirk_flags |= QUIRK_FLAG_IGNORE_CTL_ERROR; |
859 | |
860 | if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) |
861 | usb_disable_autosuspend(interface_to_usbdev(intf)); |
862 | |
863 | /* |
864 | * For devices with more than one control interface, we assume the |
865 | * first contains the audio controls. We might need a more specific |
866 | * check here in the future. |
867 | */ |
868 | if (!chip->ctrl_intf) |
869 | chip->ctrl_intf = alts; |
870 | |
871 | err = 1; /* continue */ |
872 | if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { |
873 | /* need some special handlings */ |
874 | err = snd_usb_create_quirk(chip, iface: intf, driver: &usb_audio_driver, quirk); |
875 | if (err < 0) |
876 | goto __error; |
877 | } |
878 | |
879 | if (err > 0) { |
880 | /* create normal USB audio interfaces */ |
881 | err = snd_usb_create_streams(chip, ctrlif: ifnum); |
882 | if (err < 0) |
883 | goto __error; |
884 | err = snd_usb_create_mixer(chip, ctrlif: ifnum); |
885 | if (err < 0) |
886 | goto __error; |
887 | } |
888 | |
889 | if (chip->need_delayed_register) { |
890 | dev_info(&dev->dev, |
891 | "Found post-registration device assignment: %08x:%02x\n" , |
892 | chip->usb_id, ifnum); |
893 | chip->need_delayed_register = false; /* clear again */ |
894 | } |
895 | |
896 | err = try_to_register_card(chip, ifnum); |
897 | if (err < 0) |
898 | goto __error_no_register; |
899 | |
900 | if (chip->quirk_flags & QUIRK_FLAG_SHARE_MEDIA_DEVICE) { |
901 | /* don't want to fail when snd_media_device_create() fails */ |
902 | snd_media_device_create(chip, iface: intf); |
903 | } |
904 | |
905 | if (quirk) |
906 | chip->quirk_type = quirk->type; |
907 | |
908 | usb_chip[chip->index] = chip; |
909 | chip->intf[chip->num_interfaces] = intf; |
910 | chip->num_interfaces++; |
911 | usb_set_intfdata(intf, data: chip); |
912 | atomic_dec(v: &chip->active); |
913 | mutex_unlock(lock: ®ister_mutex); |
914 | return 0; |
915 | |
916 | __error: |
917 | /* in the case of error in secondary interface, still try to register */ |
918 | if (chip) |
919 | try_to_register_card(chip, ifnum); |
920 | |
921 | __error_no_register: |
922 | if (chip) { |
923 | /* chip->active is inside the chip->card object, |
924 | * decrement before memory is possibly returned. |
925 | */ |
926 | atomic_dec(v: &chip->active); |
927 | if (!chip->num_interfaces) |
928 | snd_card_free(card: chip->card); |
929 | } |
930 | mutex_unlock(lock: ®ister_mutex); |
931 | return err; |
932 | } |
933 | |
934 | /* |
935 | * we need to take care of counter, since disconnection can be called also |
936 | * many times as well as usb_audio_probe(). |
937 | */ |
938 | static void usb_audio_disconnect(struct usb_interface *intf) |
939 | { |
940 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
941 | struct snd_card *card; |
942 | struct list_head *p; |
943 | |
944 | if (chip == USB_AUDIO_IFACE_UNUSED) |
945 | return; |
946 | |
947 | card = chip->card; |
948 | |
949 | mutex_lock(®ister_mutex); |
950 | if (atomic_inc_return(v: &chip->shutdown) == 1) { |
951 | struct snd_usb_stream *as; |
952 | struct snd_usb_endpoint *ep; |
953 | struct usb_mixer_interface *mixer; |
954 | |
955 | /* wait until all pending tasks done; |
956 | * they are protected by snd_usb_lock_shutdown() |
957 | */ |
958 | wait_event(chip->shutdown_wait, |
959 | !atomic_read(&chip->usage_count)); |
960 | snd_card_disconnect(card); |
961 | /* release the pcm resources */ |
962 | list_for_each_entry(as, &chip->pcm_list, list) { |
963 | snd_usb_stream_disconnect(as); |
964 | } |
965 | /* release the endpoint resources */ |
966 | list_for_each_entry(ep, &chip->ep_list, list) { |
967 | snd_usb_endpoint_release(ep); |
968 | } |
969 | /* release the midi resources */ |
970 | list_for_each(p, &chip->midi_list) { |
971 | snd_usbmidi_disconnect(p); |
972 | } |
973 | snd_usb_midi_v2_disconnect_all(chip); |
974 | /* |
975 | * Nice to check quirk && quirk->shares_media_device and |
976 | * then call the snd_media_device_delete(). Don't have |
977 | * access to the quirk here. snd_media_device_delete() |
978 | * accesses mixer_list |
979 | */ |
980 | snd_media_device_delete(chip); |
981 | |
982 | /* release mixer resources */ |
983 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
984 | snd_usb_mixer_disconnect(mixer); |
985 | } |
986 | } |
987 | |
988 | if (chip->quirk_flags & QUIRK_FLAG_DISABLE_AUTOSUSPEND) |
989 | usb_enable_autosuspend(interface_to_usbdev(intf)); |
990 | |
991 | chip->num_interfaces--; |
992 | if (chip->num_interfaces <= 0) { |
993 | usb_chip[chip->index] = NULL; |
994 | mutex_unlock(lock: ®ister_mutex); |
995 | snd_card_free_when_closed(card); |
996 | } else { |
997 | mutex_unlock(lock: ®ister_mutex); |
998 | } |
999 | } |
1000 | |
1001 | /* lock the shutdown (disconnect) task and autoresume */ |
1002 | int snd_usb_lock_shutdown(struct snd_usb_audio *chip) |
1003 | { |
1004 | int err; |
1005 | |
1006 | atomic_inc(v: &chip->usage_count); |
1007 | if (atomic_read(v: &chip->shutdown)) { |
1008 | err = -EIO; |
1009 | goto error; |
1010 | } |
1011 | err = snd_usb_autoresume(chip); |
1012 | if (err < 0) |
1013 | goto error; |
1014 | return 0; |
1015 | |
1016 | error: |
1017 | if (atomic_dec_and_test(v: &chip->usage_count)) |
1018 | wake_up(&chip->shutdown_wait); |
1019 | return err; |
1020 | } |
1021 | |
1022 | /* autosuspend and unlock the shutdown */ |
1023 | void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) |
1024 | { |
1025 | snd_usb_autosuspend(chip); |
1026 | if (atomic_dec_and_test(v: &chip->usage_count)) |
1027 | wake_up(&chip->shutdown_wait); |
1028 | } |
1029 | |
1030 | int snd_usb_autoresume(struct snd_usb_audio *chip) |
1031 | { |
1032 | int i, err; |
1033 | |
1034 | if (atomic_read(v: &chip->shutdown)) |
1035 | return -EIO; |
1036 | if (atomic_inc_return(v: &chip->active) != 1) |
1037 | return 0; |
1038 | |
1039 | for (i = 0; i < chip->num_interfaces; i++) { |
1040 | err = usb_autopm_get_interface(intf: chip->intf[i]); |
1041 | if (err < 0) { |
1042 | /* rollback */ |
1043 | while (--i >= 0) |
1044 | usb_autopm_put_interface(intf: chip->intf[i]); |
1045 | atomic_dec(v: &chip->active); |
1046 | return err; |
1047 | } |
1048 | } |
1049 | return 0; |
1050 | } |
1051 | |
1052 | void snd_usb_autosuspend(struct snd_usb_audio *chip) |
1053 | { |
1054 | int i; |
1055 | |
1056 | if (atomic_read(v: &chip->shutdown)) |
1057 | return; |
1058 | if (!atomic_dec_and_test(v: &chip->active)) |
1059 | return; |
1060 | |
1061 | for (i = 0; i < chip->num_interfaces; i++) |
1062 | usb_autopm_put_interface(intf: chip->intf[i]); |
1063 | } |
1064 | |
1065 | static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
1066 | { |
1067 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
1068 | struct snd_usb_stream *as; |
1069 | struct snd_usb_endpoint *ep; |
1070 | struct usb_mixer_interface *mixer; |
1071 | struct list_head *p; |
1072 | |
1073 | if (chip == USB_AUDIO_IFACE_UNUSED) |
1074 | return 0; |
1075 | |
1076 | if (!chip->num_suspended_intf++) { |
1077 | list_for_each_entry(as, &chip->pcm_list, list) |
1078 | snd_usb_pcm_suspend(as); |
1079 | list_for_each_entry(ep, &chip->ep_list, list) |
1080 | snd_usb_endpoint_suspend(ep); |
1081 | list_for_each(p, &chip->midi_list) |
1082 | snd_usbmidi_suspend(p); |
1083 | list_for_each_entry(mixer, &chip->mixer_list, list) |
1084 | snd_usb_mixer_suspend(mixer); |
1085 | snd_usb_midi_v2_suspend_all(chip); |
1086 | } |
1087 | |
1088 | if (!PMSG_IS_AUTO(message) && !chip->system_suspend) { |
1089 | snd_power_change_state(card: chip->card, SNDRV_CTL_POWER_D3hot); |
1090 | chip->system_suspend = chip->num_suspended_intf; |
1091 | } |
1092 | |
1093 | return 0; |
1094 | } |
1095 | |
1096 | static int usb_audio_resume(struct usb_interface *intf) |
1097 | { |
1098 | struct snd_usb_audio *chip = usb_get_intfdata(intf); |
1099 | struct snd_usb_stream *as; |
1100 | struct usb_mixer_interface *mixer; |
1101 | struct list_head *p; |
1102 | int err = 0; |
1103 | |
1104 | if (chip == USB_AUDIO_IFACE_UNUSED) |
1105 | return 0; |
1106 | |
1107 | atomic_inc(v: &chip->active); /* avoid autopm */ |
1108 | if (chip->num_suspended_intf > 1) |
1109 | goto out; |
1110 | |
1111 | list_for_each_entry(as, &chip->pcm_list, list) { |
1112 | err = snd_usb_pcm_resume(as); |
1113 | if (err < 0) |
1114 | goto err_out; |
1115 | } |
1116 | |
1117 | /* |
1118 | * ALSA leaves material resumption to user space |
1119 | * we just notify and restart the mixers |
1120 | */ |
1121 | list_for_each_entry(mixer, &chip->mixer_list, list) { |
1122 | err = snd_usb_mixer_resume(mixer); |
1123 | if (err < 0) |
1124 | goto err_out; |
1125 | } |
1126 | |
1127 | list_for_each(p, &chip->midi_list) { |
1128 | snd_usbmidi_resume(p); |
1129 | } |
1130 | |
1131 | snd_usb_midi_v2_resume_all(chip); |
1132 | |
1133 | out: |
1134 | if (chip->num_suspended_intf == chip->system_suspend) { |
1135 | snd_power_change_state(card: chip->card, SNDRV_CTL_POWER_D0); |
1136 | chip->system_suspend = 0; |
1137 | } |
1138 | chip->num_suspended_intf--; |
1139 | |
1140 | err_out: |
1141 | atomic_dec(v: &chip->active); /* allow autopm after this point */ |
1142 | return err; |
1143 | } |
1144 | |
1145 | static const struct usb_device_id usb_audio_ids [] = { |
1146 | #include "quirks-table.h" |
1147 | { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), |
1148 | .bInterfaceClass = USB_CLASS_AUDIO, |
1149 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, |
1150 | { } /* Terminating entry */ |
1151 | }; |
1152 | MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
1153 | |
1154 | /* |
1155 | * entry point for linux usb interface |
1156 | */ |
1157 | |
1158 | static struct usb_driver usb_audio_driver = { |
1159 | .name = "snd-usb-audio" , |
1160 | .probe = usb_audio_probe, |
1161 | .disconnect = usb_audio_disconnect, |
1162 | .suspend = usb_audio_suspend, |
1163 | .resume = usb_audio_resume, |
1164 | .reset_resume = usb_audio_resume, |
1165 | .id_table = usb_audio_ids, |
1166 | .supports_autosuspend = 1, |
1167 | }; |
1168 | |
1169 | module_usb_driver(usb_audio_driver); |
1170 | |