Commit | Line | Data |
---|---|---|
a52932b4 MR |
1 | /* |
2 | * Empiatech em28x1 audio extension | |
3 | * | |
4 | * Copyright (C) 2006 Markus Rechberger <mrechberger@gmail.com> | |
5 | * | |
f5f894d1 | 6 | * Copyright (C) 2007-2014 Mauro Carvalho Chehab |
6d79468d | 7 | * - Port to work with the in-kernel driver |
4f83e7b3 | 8 | * - Cleanups, fixes, alsa-controls, etc. |
6d79468d | 9 | * |
a52932b4 MR |
10 | * This driver is based on my previous au600 usb pstn audio driver |
11 | * and inherits all the copyrights | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/usb.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/sound.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/soundcard.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/vmalloc.h> | |
36 | #include <linux/proc_fs.h> | |
6d79468d | 37 | #include <linux/module.h> |
a52932b4 MR |
38 | #include <sound/core.h> |
39 | #include <sound/pcm.h> | |
40 | #include <sound/pcm_params.h> | |
41 | #include <sound/info.h> | |
42 | #include <sound/initval.h> | |
43 | #include <sound/control.h> | |
850d24a5 | 44 | #include <sound/tlv.h> |
67b8d033 | 45 | #include <sound/ac97_codec.h> |
a52932b4 MR |
46 | #include <media/v4l2-common.h> |
47 | #include "em28xx.h" | |
48 | ||
6d79468d MCC |
49 | static int debug; |
50 | module_param(debug, int, 0644); | |
51 | MODULE_PARM_DESC(debug, "activates debug info"); | |
a52932b4 | 52 | |
1b3fd2d3 MCC |
53 | #define EM28XX_MAX_AUDIO_BUFS 5 |
54 | #define EM28XX_MIN_AUDIO_PACKETS 64 | |
49677aef | 55 | |
6d79468d MCC |
56 | #define dprintk(fmt, arg...) do { \ |
57 | if (debug) \ | |
58 | printk(KERN_INFO "em28xx-audio %s: " fmt, \ | |
fdf1bc9f | 59 | __func__, ##arg); \ |
6d79468d | 60 | } while (0) |
a52932b4 | 61 | |
6d79468d | 62 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; |
a52932b4 | 63 | |
aa5a1821 | 64 | static int em28xx_deinit_isoc_audio(struct em28xx *dev) |
a52932b4 | 65 | { |
6d79468d | 66 | int i; |
a52932b4 | 67 | |
6d79468d | 68 | dprintk("Stopping isoc\n"); |
1b3fd2d3 | 69 | for (i = 0; i < dev->adev.num_urb; i++) { |
46c704d7 MCC |
70 | struct urb *urb = dev->adev.urb[i]; |
71 | ||
9c06210b | 72 | if (!irqs_disabled()) |
46c704d7 | 73 | usb_kill_urb(urb); |
9c06210b | 74 | else |
46c704d7 | 75 | usb_unlink_urb(urb); |
a52932b4 | 76 | } |
a52932b4 | 77 | |
a52932b4 MR |
78 | return 0; |
79 | } | |
80 | ||
a52932b4 MR |
81 | static void em28xx_audio_isocirq(struct urb *urb) |
82 | { | |
6d79468d MCC |
83 | struct em28xx *dev = urb->context; |
84 | int i; | |
85 | unsigned int oldptr; | |
6d79468d MCC |
86 | int period_elapsed = 0; |
87 | int status; | |
88 | unsigned char *cp; | |
89 | unsigned int stride; | |
a52932b4 | 90 | struct snd_pcm_substream *substream; |
6d79468d | 91 | struct snd_pcm_runtime *runtime; |
aa5a1821 | 92 | |
8b1fa579 MCC |
93 | if (dev->disconnected) { |
94 | dprintk("device disconnected while streaming. URB status=%d.\n", urb->status); | |
a5c075cf | 95 | atomic_set(&dev->adev.stream_started, 0); |
8b1fa579 MCC |
96 | return; |
97 | } | |
98 | ||
aa5a1821 RK |
99 | switch (urb->status) { |
100 | case 0: /* success */ | |
101 | case -ETIMEDOUT: /* NAK */ | |
102 | break; | |
103 | case -ECONNRESET: /* kill */ | |
104 | case -ENOENT: | |
105 | case -ESHUTDOWN: | |
106 | return; | |
107 | default: /* error */ | |
108 | dprintk("urb completition error %d.\n", urb->status); | |
109 | break; | |
110 | } | |
111 | ||
a5c075cf | 112 | if (atomic_read(&dev->adev.stream_started) == 0) |
39a96b4c MCC |
113 | return; |
114 | ||
9baed99e MCC |
115 | if (dev->adev.capture_pcm_substream) { |
116 | substream = dev->adev.capture_pcm_substream; | |
1a6f11e0 | 117 | runtime = substream->runtime; |
a52932b4 | 118 | stride = runtime->frame_bits >> 3; |
6d79468d | 119 | |
1a6f11e0 MCC |
120 | for (i = 0; i < urb->number_of_packets; i++) { |
121 | int length = | |
122 | urb->iso_frame_desc[i].actual_length / stride; | |
123 | cp = (unsigned char *)urb->transfer_buffer + | |
124 | urb->iso_frame_desc[i].offset; | |
a52932b4 | 125 | |
1a6f11e0 | 126 | if (!length) |
a52932b4 MR |
127 | continue; |
128 | ||
9baed99e | 129 | oldptr = dev->adev.hwptr_done_capture; |
50f3beb5 MCC |
130 | if (oldptr + length >= runtime->buffer_size) { |
131 | unsigned int cnt = | |
132 | runtime->buffer_size - oldptr; | |
133 | memcpy(runtime->dma_area + oldptr * stride, cp, | |
134 | cnt * stride); | |
135 | memcpy(runtime->dma_area, cp + cnt * stride, | |
136 | length * stride - cnt * stride); | |
137 | } else { | |
138 | memcpy(runtime->dma_area + oldptr * stride, cp, | |
139 | length * stride); | |
140 | } | |
141 | ||
50f3beb5 | 142 | snd_pcm_stream_lock(substream); |
50f3beb5 | 143 | |
9baed99e MCC |
144 | dev->adev.hwptr_done_capture += length; |
145 | if (dev->adev.hwptr_done_capture >= | |
1a6f11e0 | 146 | runtime->buffer_size) |
9baed99e | 147 | dev->adev.hwptr_done_capture -= |
1a6f11e0 | 148 | runtime->buffer_size; |
a52932b4 | 149 | |
9baed99e MCC |
150 | dev->adev.capture_transfer_done += length; |
151 | if (dev->adev.capture_transfer_done >= | |
1a6f11e0 | 152 | runtime->period_size) { |
9baed99e | 153 | dev->adev.capture_transfer_done -= |
1a6f11e0 MCC |
154 | runtime->period_size; |
155 | period_elapsed = 1; | |
a52932b4 | 156 | } |
6d79468d | 157 | |
50f3beb5 | 158 | snd_pcm_stream_unlock(substream); |
a52932b4 | 159 | } |
6d79468d | 160 | if (period_elapsed) |
a52932b4 | 161 | snd_pcm_period_elapsed(substream); |
a52932b4 MR |
162 | } |
163 | urb->status = 0; | |
1a6f11e0 | 164 | |
6d79468d | 165 | status = usb_submit_urb(urb, GFP_ATOMIC); |
bf6e8aaa | 166 | if (status < 0) |
1a6f11e0 MCC |
167 | em28xx_errdev("resubmit of audio urb failed (error=%i)\n", |
168 | status); | |
a52932b4 MR |
169 | return; |
170 | } | |
171 | ||
a52932b4 MR |
172 | static int em28xx_init_audio_isoc(struct em28xx *dev) |
173 | { | |
6d79468d | 174 | int i, errCode; |
6d79468d MCC |
175 | |
176 | dprintk("Starting isoc transfers\n"); | |
a52932b4 | 177 | |
f5f894d1 | 178 | /* Start streaming */ |
1b3fd2d3 | 179 | for (i = 0; i < dev->adev.num_urb; i++) { |
f5f894d1 MCC |
180 | memset(dev->adev.transfer_buffer[i], 0x80, |
181 | dev->adev.urb[i]->transfer_buffer_length); | |
6d79468d | 182 | |
9baed99e | 183 | errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC); |
1a6f11e0 | 184 | if (errCode) { |
bf6e8aaa MCC |
185 | em28xx_errdev("submit of audio urb failed (error=%i)\n", |
186 | errCode); | |
aa5a1821 | 187 | em28xx_deinit_isoc_audio(dev); |
a5c075cf | 188 | atomic_set(&dev->adev.stream_started, 0); |
a52932b4 MR |
189 | return errCode; |
190 | } | |
debb7241 | 191 | |
a52932b4 | 192 | } |
6d79468d | 193 | |
a52932b4 MR |
194 | return 0; |
195 | } | |
196 | ||
6d79468d MCC |
197 | static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, |
198 | size_t size) | |
199 | { | |
200 | struct snd_pcm_runtime *runtime = subs->runtime; | |
201 | ||
a1a6ee74 | 202 | dprintk("Allocating vbuffer\n"); |
6d79468d MCC |
203 | if (runtime->dma_area) { |
204 | if (runtime->dma_bytes > size) | |
205 | return 0; | |
206 | ||
207 | vfree(runtime->dma_area); | |
208 | } | |
209 | runtime->dma_area = vmalloc(size); | |
210 | if (!runtime->dma_area) | |
211 | return -ENOMEM; | |
212 | ||
213 | runtime->dma_bytes = size; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | static struct snd_pcm_hardware snd_em28xx_hw_capture = { | |
219 | .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
220 | SNDRV_PCM_INFO_MMAP | | |
221 | SNDRV_PCM_INFO_INTERLEAVED | | |
dff0f8c2 | 222 | SNDRV_PCM_INFO_BATCH | |
6d79468d MCC |
223 | SNDRV_PCM_INFO_MMAP_VALID, |
224 | ||
225 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
226 | ||
49677aef | 227 | .rates = SNDRV_PCM_RATE_48000, |
6d79468d MCC |
228 | |
229 | .rate_min = 48000, | |
230 | .rate_max = 48000, | |
231 | .channels_min = 2, | |
232 | .channels_max = 2, | |
233 | .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */ | |
49677aef | 234 | |
49677aef MCC |
235 | /* |
236 | * The period is 12.288 bytes. Allow a 10% of variation along its | |
237 | * value, in order to avoid overruns/underruns due to some clock | |
238 | * drift. | |
239 | * | |
240 | * FIXME: This period assumes 64 packets, and a 48000 PCM rate. | |
241 | * Calculate it dynamically. | |
242 | */ | |
243 | .period_bytes_min = 11059, | |
244 | .period_bytes_max = 13516, | |
245 | ||
6d79468d MCC |
246 | .periods_min = 2, |
247 | .periods_max = 98, /* 12544, */ | |
248 | }; | |
249 | ||
250 | static int snd_em28xx_capture_open(struct snd_pcm_substream *substream) | |
251 | { | |
252 | struct em28xx *dev = snd_pcm_substream_chip(substream); | |
253 | struct snd_pcm_runtime *runtime = substream->runtime; | |
01ae3b51 | 254 | int nonblock, ret = 0; |
6d79468d | 255 | |
83ee87a3 | 256 | if (!dev) { |
0bc23083 | 257 | em28xx_err("BUG: em28xx can't find device struct." |
83ee87a3 MCC |
258 | " Can't proceed with open\n"); |
259 | return -ENODEV; | |
260 | } | |
261 | ||
8b1fa579 MCC |
262 | if (dev->disconnected) |
263 | return -ENODEV; | |
264 | ||
265 | dprintk("opening device and trying to acquire exclusive lock\n"); | |
266 | ||
01ae3b51 FS |
267 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
268 | if (nonblock) { | |
269 | if (!mutex_trylock(&dev->lock)) | |
0db32414 | 270 | return -EAGAIN; |
01ae3b51 FS |
271 | } else |
272 | mutex_lock(&dev->lock); | |
273 | ||
4f83e7b3 | 274 | runtime->hw = snd_em28xx_hw_capture; |
ba35ca07 FS |
275 | |
276 | if (dev->adev.users == 0) { | |
277 | if (dev->alt == 0 || dev->is_audio_only) { | |
278 | if (dev->is_audio_only) | |
279 | /* audio is on a separate interface */ | |
280 | dev->alt = 1; | |
281 | else | |
282 | /* audio is on the same interface as video */ | |
283 | dev->alt = 7; | |
284 | /* | |
285 | * FIXME: The intention seems to be to select | |
286 | * the alt setting with the largest | |
287 | * wMaxPacketSize for the video endpoint. | |
288 | * At least dev->alt should be used instead, but | |
289 | * we should probably not touch it at all if it | |
290 | * is already >0, because wMaxPacketSize of the | |
291 | * audio endpoints seems to be the same for all. | |
292 | */ | |
293 | dprintk("changing alternate number on interface %d to %d\n", | |
294 | dev->ifnum, dev->alt); | |
295 | usb_set_interface(dev->udev, dev->ifnum, dev->alt); | |
296 | } | |
6d79468d | 297 | |
4f83e7b3 MCC |
298 | /* Sets volume, mute, etc */ |
299 | dev->mute = 0; | |
4f83e7b3 MCC |
300 | ret = em28xx_audio_analog_set(dev); |
301 | if (ret < 0) | |
302 | goto err; | |
4f83e7b3 | 303 | } |
6d79468d | 304 | |
47677e51 | 305 | kref_get(&dev->ref); |
01ae3b51 FS |
306 | dev->adev.users++; |
307 | mutex_unlock(&dev->lock); | |
308 | ||
a02b9c23 | 309 | /* Dynamically adjust the period size */ |
6d79468d | 310 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
a02b9c23 MCC |
311 | snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, |
312 | dev->adev.period * 95 / 100, | |
313 | dev->adev.period * 105 / 100); | |
314 | ||
9baed99e | 315 | dev->adev.capture_pcm_substream = substream; |
6d79468d MCC |
316 | |
317 | return 0; | |
318 | err: | |
39a96b4c MCC |
319 | mutex_unlock(&dev->lock); |
320 | ||
0bc23083 | 321 | em28xx_err("Error while configuring em28xx mixer\n"); |
6d79468d MCC |
322 | return ret; |
323 | } | |
324 | ||
325 | static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream) | |
326 | { | |
327 | struct em28xx *dev = snd_pcm_substream_chip(substream); | |
6d79468d MCC |
328 | |
329 | dprintk("closing device\n"); | |
330 | ||
331 | dev->mute = 1; | |
92ea42f4 | 332 | mutex_lock(&dev->lock); |
bf510ac3 | 333 | dev->adev.users--; |
a5c075cf FS |
334 | if (atomic_read(&dev->adev.stream_started) > 0) { |
335 | atomic_set(&dev->adev.stream_started, 0); | |
336 | schedule_work(&dev->adev.wq_trigger); | |
39a96b4c MCC |
337 | } |
338 | ||
6d79468d | 339 | em28xx_audio_analog_set(dev); |
75c74d1c RK |
340 | if (substream->runtime->dma_area) { |
341 | dprintk("freeing\n"); | |
342 | vfree(substream->runtime->dma_area); | |
343 | substream->runtime->dma_area = NULL; | |
344 | } | |
92ea42f4 | 345 | mutex_unlock(&dev->lock); |
47677e51 | 346 | kref_put(&dev->ref, em28xx_free_device); |
6d79468d | 347 | |
6d79468d MCC |
348 | return 0; |
349 | } | |
350 | ||
351 | static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream, | |
352 | struct snd_pcm_hw_params *hw_params) | |
353 | { | |
6d79468d | 354 | int ret; |
8b1fa579 MCC |
355 | struct em28xx *dev = snd_pcm_substream_chip(substream); |
356 | ||
357 | if (dev->disconnected) | |
358 | return -ENODEV; | |
6d79468d MCC |
359 | |
360 | dprintk("Setting capture parameters\n"); | |
361 | ||
362 | ret = snd_pcm_alloc_vmalloc_buffer(substream, | |
fdf1bc9f | 363 | params_buffer_bytes(hw_params)); |
00d2e7ad MCC |
364 | if (ret < 0) |
365 | return ret; | |
e92ba283 HV |
366 | #if 0 |
367 | /* TODO: set up em28xx audio chip to deliver the correct audio format, | |
368 | current default is 48000hz multiplexed => 96000hz mono | |
369 | which shouldn't matter since analogue TV only supports mono */ | |
370 | unsigned int channels, rate, format; | |
371 | ||
6d79468d MCC |
372 | format = params_format(hw_params); |
373 | rate = params_rate(hw_params); | |
374 | channels = params_channels(hw_params); | |
e92ba283 | 375 | #endif |
6d79468d | 376 | |
6d79468d MCC |
377 | return 0; |
378 | } | |
379 | ||
380 | static int snd_em28xx_hw_capture_free(struct snd_pcm_substream *substream) | |
381 | { | |
382 | struct em28xx *dev = snd_pcm_substream_chip(substream); | |
a5c075cf | 383 | struct em28xx_audio *adev = &dev->adev; |
6d79468d MCC |
384 | |
385 | dprintk("Stop capture, if needed\n"); | |
386 | ||
a5c075cf FS |
387 | if (atomic_read(&adev->stream_started) > 0) { |
388 | atomic_set(&adev->stream_started, 0); | |
389 | schedule_work(&adev->wq_trigger); | |
39a96b4c | 390 | } |
6d79468d MCC |
391 | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static int snd_em28xx_prepare(struct snd_pcm_substream *substream) | |
396 | { | |
96fbf771 DH |
397 | struct em28xx *dev = snd_pcm_substream_chip(substream); |
398 | ||
8b1fa579 MCC |
399 | if (dev->disconnected) |
400 | return -ENODEV; | |
401 | ||
96fbf771 DH |
402 | dev->adev.hwptr_done_capture = 0; |
403 | dev->adev.capture_transfer_done = 0; | |
404 | ||
6d79468d MCC |
405 | return 0; |
406 | } | |
407 | ||
39a96b4c MCC |
408 | static void audio_trigger(struct work_struct *work) |
409 | { | |
a5c075cf FS |
410 | struct em28xx_audio *adev = |
411 | container_of(work, struct em28xx_audio, wq_trigger); | |
412 | struct em28xx *dev = container_of(adev, struct em28xx, adev); | |
39a96b4c | 413 | |
a5c075cf | 414 | if (atomic_read(&adev->stream_started)) { |
39a96b4c MCC |
415 | dprintk("starting capture"); |
416 | em28xx_init_audio_isoc(dev); | |
417 | } else { | |
418 | dprintk("stopping capture"); | |
419 | em28xx_deinit_isoc_audio(dev); | |
420 | } | |
421 | } | |
422 | ||
6d79468d MCC |
423 | static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream, |
424 | int cmd) | |
425 | { | |
426 | struct em28xx *dev = snd_pcm_substream_chip(substream); | |
00d2e7ad | 427 | int retval = 0; |
6d79468d | 428 | |
8b1fa579 MCC |
429 | if (dev->disconnected) |
430 | return -ENODEV; | |
431 | ||
6d79468d | 432 | switch (cmd) { |
dff0f8c2 MCC |
433 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ |
434 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
6d79468d | 435 | case SNDRV_PCM_TRIGGER_START: |
a5c075cf | 436 | atomic_set(&dev->adev.stream_started, 1); |
df39ca64 | 437 | break; |
dff0f8c2 MCC |
438 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ |
439 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
6d79468d | 440 | case SNDRV_PCM_TRIGGER_STOP: |
a5c075cf | 441 | atomic_set(&dev->adev.stream_started, 0); |
df39ca64 | 442 | break; |
6d79468d | 443 | default: |
df39ca64 | 444 | retval = -EINVAL; |
6d79468d | 445 | } |
a5c075cf | 446 | schedule_work(&dev->adev.wq_trigger); |
00d2e7ad | 447 | return retval; |
6d79468d MCC |
448 | } |
449 | ||
1a6f11e0 MCC |
450 | static snd_pcm_uframes_t snd_em28xx_capture_pointer(struct snd_pcm_substream |
451 | *substream) | |
a52932b4 | 452 | { |
a1a6ee74 | 453 | unsigned long flags; |
53d12e5a | 454 | struct em28xx *dev; |
a52932b4 | 455 | snd_pcm_uframes_t hwptr_done; |
53d12e5a | 456 | |
a52932b4 | 457 | dev = snd_pcm_substream_chip(substream); |
8b1fa579 | 458 | if (dev->disconnected) |
229295f1 | 459 | return SNDRV_PCM_POS_XRUN; |
8b1fa579 | 460 | |
00bc0645 | 461 | spin_lock_irqsave(&dev->adev.slock, flags); |
9baed99e | 462 | hwptr_done = dev->adev.hwptr_done_capture; |
00bc0645 | 463 | spin_unlock_irqrestore(&dev->adev.slock, flags); |
6d79468d | 464 | |
a52932b4 MR |
465 | return hwptr_done; |
466 | } | |
467 | ||
468 | static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, | |
469 | unsigned long offset) | |
470 | { | |
471 | void *pageptr = subs->runtime->dma_area + offset; | |
6d79468d | 472 | |
a52932b4 MR |
473 | return vmalloc_to_page(pageptr); |
474 | } | |
475 | ||
850d24a5 MCC |
476 | /* |
477 | * AC97 volume control support | |
478 | */ | |
479 | static int em28xx_vol_info(struct snd_kcontrol *kcontrol, | |
fdf1bc9f | 480 | struct snd_ctl_elem_info *info) |
850d24a5 | 481 | { |
8b1fa579 MCC |
482 | struct em28xx *dev = snd_kcontrol_chip(kcontrol); |
483 | ||
484 | if (dev->disconnected) | |
485 | return -ENODEV; | |
486 | ||
850d24a5 MCC |
487 | info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
488 | info->count = 2; | |
489 | info->value.integer.min = 0; | |
490 | info->value.integer.max = 0x1f; | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
850d24a5 | 495 | static int em28xx_vol_put(struct snd_kcontrol *kcontrol, |
fdf1bc9f | 496 | struct snd_ctl_elem_value *value) |
850d24a5 MCC |
497 | { |
498 | struct em28xx *dev = snd_kcontrol_chip(kcontrol); | |
34906633 | 499 | struct snd_pcm_substream *substream = dev->adev.capture_pcm_substream; |
71d7d83e MCC |
500 | u16 val = (0x1f - (value->value.integer.value[0] & 0x1f)) | |
501 | (0x1f - (value->value.integer.value[1] & 0x1f)) << 8; | |
34906633 | 502 | int nonblock = 0; |
850d24a5 MCC |
503 | int rc; |
504 | ||
8b1fa579 MCC |
505 | if (dev->disconnected) |
506 | return -ENODEV; | |
507 | ||
34906633 MCC |
508 | if (substream) |
509 | nonblock = !!(substream->f_flags & O_NONBLOCK); | |
510 | if (nonblock) { | |
511 | if (!mutex_trylock(&dev->lock)) | |
512 | return -EAGAIN; | |
513 | } else | |
514 | mutex_lock(&dev->lock); | |
850d24a5 MCC |
515 | rc = em28xx_read_ac97(dev, kcontrol->private_value); |
516 | if (rc < 0) | |
517 | goto err; | |
518 | ||
43131a2c | 519 | val |= rc & 0x8000; /* Preserve the mute flag */ |
850d24a5 MCC |
520 | |
521 | rc = em28xx_write_ac97(dev, kcontrol->private_value, val); | |
66cb6957 MCC |
522 | if (rc < 0) |
523 | goto err; | |
524 | ||
525 | dprintk("%sleft vol %d, right vol %d (0x%04x) to ac97 volume control 0x%04x\n", | |
526 | (val & 0x8000) ? "muted " : "", | |
527 | 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f), | |
528 | val, (int)kcontrol->private_value); | |
850d24a5 MCC |
529 | |
530 | err: | |
531 | mutex_unlock(&dev->lock); | |
532 | return rc; | |
533 | } | |
534 | ||
535 | static int em28xx_vol_get(struct snd_kcontrol *kcontrol, | |
fdf1bc9f | 536 | struct snd_ctl_elem_value *value) |
850d24a5 MCC |
537 | { |
538 | struct em28xx *dev = snd_kcontrol_chip(kcontrol); | |
34906633 MCC |
539 | struct snd_pcm_substream *substream = dev->adev.capture_pcm_substream; |
540 | int nonblock = 0; | |
850d24a5 MCC |
541 | int val; |
542 | ||
8b1fa579 MCC |
543 | if (dev->disconnected) |
544 | return -ENODEV; | |
545 | ||
34906633 MCC |
546 | if (substream) |
547 | nonblock = !!(substream->f_flags & O_NONBLOCK); | |
548 | if (nonblock) { | |
549 | if (!mutex_trylock(&dev->lock)) | |
550 | return -EAGAIN; | |
551 | } else | |
552 | mutex_lock(&dev->lock); | |
850d24a5 MCC |
553 | val = em28xx_read_ac97(dev, kcontrol->private_value); |
554 | mutex_unlock(&dev->lock); | |
555 | if (val < 0) | |
556 | return val; | |
557 | ||
66cb6957 MCC |
558 | dprintk("%sleft vol %d, right vol %d (0x%04x) from ac97 volume control 0x%04x\n", |
559 | (val & 0x8000) ? "muted " : "", | |
560 | 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f), | |
561 | val, (int)kcontrol->private_value); | |
562 | ||
71d7d83e MCC |
563 | value->value.integer.value[0] = 0x1f - (val & 0x1f); |
564 | value->value.integer.value[1] = 0x1f - ((val << 8) & 0x1f); | |
850d24a5 MCC |
565 | |
566 | return 0; | |
567 | } | |
568 | ||
43131a2c MCC |
569 | static int em28xx_vol_put_mute(struct snd_kcontrol *kcontrol, |
570 | struct snd_ctl_elem_value *value) | |
571 | { | |
572 | struct em28xx *dev = snd_kcontrol_chip(kcontrol); | |
573 | u16 val = value->value.integer.value[0]; | |
34906633 MCC |
574 | struct snd_pcm_substream *substream = dev->adev.capture_pcm_substream; |
575 | int nonblock = 0; | |
43131a2c MCC |
576 | int rc; |
577 | ||
8b1fa579 MCC |
578 | if (dev->disconnected) |
579 | return -ENODEV; | |
580 | ||
34906633 MCC |
581 | if (substream) |
582 | nonblock = !!(substream->f_flags & O_NONBLOCK); | |
583 | if (nonblock) { | |
584 | if (!mutex_trylock(&dev->lock)) | |
585 | return -EAGAIN; | |
586 | } else | |
587 | mutex_lock(&dev->lock); | |
43131a2c MCC |
588 | rc = em28xx_read_ac97(dev, kcontrol->private_value); |
589 | if (rc < 0) | |
590 | goto err; | |
591 | ||
592 | if (val) | |
71d7d83e | 593 | rc &= 0x1f1f; |
43131a2c | 594 | else |
71d7d83e | 595 | rc |= 0x8000; |
43131a2c MCC |
596 | |
597 | rc = em28xx_write_ac97(dev, kcontrol->private_value, rc); | |
66cb6957 MCC |
598 | if (rc < 0) |
599 | goto err; | |
600 | ||
601 | dprintk("%sleft vol %d, right vol %d (0x%04x) to ac97 volume control 0x%04x\n", | |
602 | (val & 0x8000) ? "muted " : "", | |
603 | 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f), | |
604 | val, (int)kcontrol->private_value); | |
43131a2c MCC |
605 | |
606 | err: | |
607 | mutex_unlock(&dev->lock); | |
608 | return rc; | |
609 | } | |
610 | ||
611 | static int em28xx_vol_get_mute(struct snd_kcontrol *kcontrol, | |
612 | struct snd_ctl_elem_value *value) | |
613 | { | |
614 | struct em28xx *dev = snd_kcontrol_chip(kcontrol); | |
34906633 MCC |
615 | struct snd_pcm_substream *substream = dev->adev.capture_pcm_substream; |
616 | int nonblock = 0; | |
43131a2c MCC |
617 | int val; |
618 | ||
8b1fa579 MCC |
619 | if (dev->disconnected) |
620 | return -ENODEV; | |
621 | ||
34906633 MCC |
622 | if (substream) |
623 | nonblock = !!(substream->f_flags & O_NONBLOCK); | |
624 | if (nonblock) { | |
625 | if (!mutex_trylock(&dev->lock)) | |
626 | return -EAGAIN; | |
627 | } else | |
628 | mutex_lock(&dev->lock); | |
43131a2c MCC |
629 | val = em28xx_read_ac97(dev, kcontrol->private_value); |
630 | mutex_unlock(&dev->lock); | |
631 | if (val < 0) | |
632 | return val; | |
633 | ||
634 | if (val & 0x8000) | |
43131a2c | 635 | value->value.integer.value[0] = 0; |
71d7d83e MCC |
636 | else |
637 | value->value.integer.value[0] = 1; | |
43131a2c | 638 | |
66cb6957 MCC |
639 | dprintk("%sleft vol %d, right vol %d (0x%04x) from ac97 volume control 0x%04x\n", |
640 | (val & 0x8000) ? "muted " : "", | |
641 | 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f), | |
642 | val, (int)kcontrol->private_value); | |
643 | ||
43131a2c MCC |
644 | return 0; |
645 | } | |
646 | ||
850d24a5 MCC |
647 | static const DECLARE_TLV_DB_SCALE(em28xx_db_scale, -3450, 150, 0); |
648 | ||
649 | static int em28xx_cvol_new(struct snd_card *card, struct em28xx *dev, | |
650 | char *name, int id) | |
651 | { | |
652 | int err; | |
43131a2c | 653 | char ctl_name[44]; |
850d24a5 | 654 | struct snd_kcontrol *kctl; |
43131a2c MCC |
655 | struct snd_kcontrol_new tmp; |
656 | ||
fdf1bc9f | 657 | memset(&tmp, 0, sizeof(tmp)); |
43131a2c MCC |
658 | tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
659 | tmp.private_value = id, | |
660 | tmp.name = ctl_name, | |
661 | ||
662 | /* Add Mute Control */ | |
663 | sprintf(ctl_name, "%s Switch", name); | |
664 | tmp.get = em28xx_vol_get_mute; | |
665 | tmp.put = em28xx_vol_put_mute; | |
666 | tmp.info = snd_ctl_boolean_mono_info; | |
850d24a5 | 667 | kctl = snd_ctl_new1(&tmp, dev); |
43131a2c MCC |
668 | err = snd_ctl_add(card, kctl); |
669 | if (err < 0) | |
670 | return err; | |
66cb6957 MCC |
671 | dprintk("Added control %s for ac97 volume control 0x%04x\n", |
672 | ctl_name, id); | |
850d24a5 | 673 | |
fdf1bc9f | 674 | memset(&tmp, 0, sizeof(tmp)); |
43131a2c MCC |
675 | tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
676 | tmp.private_value = id, | |
677 | tmp.name = ctl_name, | |
678 | ||
679 | /* Add Volume Control */ | |
680 | sprintf(ctl_name, "%s Volume", name); | |
681 | tmp.get = em28xx_vol_get; | |
682 | tmp.put = em28xx_vol_put; | |
683 | tmp.info = em28xx_vol_info; | |
684 | tmp.tlv.p = em28xx_db_scale, | |
685 | kctl = snd_ctl_new1(&tmp, dev); | |
850d24a5 MCC |
686 | err = snd_ctl_add(card, kctl); |
687 | if (err < 0) | |
688 | return err; | |
66cb6957 MCC |
689 | dprintk("Added control %s for ac97 volume control 0x%04x\n", |
690 | ctl_name, id); | |
850d24a5 MCC |
691 | |
692 | return 0; | |
693 | } | |
694 | ||
850d24a5 MCC |
695 | /* |
696 | * register/unregister code and data | |
697 | */ | |
a52932b4 | 698 | static struct snd_pcm_ops snd_em28xx_pcm_capture = { |
6d79468d MCC |
699 | .open = snd_em28xx_capture_open, |
700 | .close = snd_em28xx_pcm_close, | |
701 | .ioctl = snd_pcm_lib_ioctl, | |
a52932b4 | 702 | .hw_params = snd_em28xx_hw_capture_params, |
6d79468d MCC |
703 | .hw_free = snd_em28xx_hw_capture_free, |
704 | .prepare = snd_em28xx_prepare, | |
705 | .trigger = snd_em28xx_capture_trigger, | |
706 | .pointer = snd_em28xx_capture_pointer, | |
707 | .page = snd_pcm_get_vmalloc_page, | |
a52932b4 MR |
708 | }; |
709 | ||
f5f894d1 MCC |
710 | static void em28xx_audio_free_urb(struct em28xx *dev) |
711 | { | |
712 | int i; | |
713 | ||
1b3fd2d3 | 714 | for (i = 0; i < dev->adev.num_urb; i++) { |
f5f894d1 MCC |
715 | struct urb *urb = dev->adev.urb[i]; |
716 | ||
1b3fd2d3 | 717 | if (!urb) |
f5f894d1 MCC |
718 | continue; |
719 | ||
ff0284cc WY |
720 | usb_free_coherent(dev->udev, urb->transfer_buffer_length, |
721 | dev->adev.transfer_buffer[i], | |
722 | urb->transfer_dma); | |
f5f894d1 MCC |
723 | |
724 | usb_free_urb(urb); | |
f5f894d1 | 725 | } |
1b3fd2d3 MCC |
726 | kfree(dev->adev.urb); |
727 | kfree(dev->adev.transfer_buffer); | |
728 | dev->adev.num_urb = 0; | |
729 | } | |
730 | ||
731 | /* high bandwidth multiplier, as encoded in highspeed endpoint descriptors */ | |
732 | static int em28xx_audio_ep_packet_size(struct usb_device *udev, | |
fdf1bc9f | 733 | struct usb_endpoint_descriptor *e) |
1b3fd2d3 MCC |
734 | { |
735 | int size = le16_to_cpu(e->wMaxPacketSize); | |
736 | ||
737 | if (udev->speed == USB_SPEED_HIGH) | |
738 | return (size & 0x7ff) * (1 + (((size) >> 11) & 0x03)); | |
739 | ||
740 | return size & 0x7ff; | |
f5f894d1 MCC |
741 | } |
742 | ||
966f4163 | 743 | static int em28xx_audio_urb_init(struct em28xx *dev) |
a52932b4 | 744 | { |
d2849fa5 MCC |
745 | struct usb_interface *intf; |
746 | struct usb_endpoint_descriptor *e, *ep = NULL; | |
966f4163 | 747 | int i, ep_size, interval, num_urb, npackets; |
1b3fd2d3 | 748 | int urb_size, bytes_per_transfer; |
d2849fa5 | 749 | u8 alt; |
6d79468d | 750 | |
961717b4 | 751 | if (dev->ifnum) |
d2849fa5 MCC |
752 | alt = 1; |
753 | else | |
754 | alt = 7; | |
755 | ||
961717b4 | 756 | intf = usb_ifnum_to_if(dev->udev, dev->ifnum); |
d2849fa5 MCC |
757 | |
758 | if (intf->num_altsetting <= alt) { | |
759 | em28xx_errdev("alt %d doesn't exist on interface %d\n", | |
961717b4 | 760 | dev->ifnum, alt); |
d2849fa5 MCC |
761 | return -ENODEV; |
762 | } | |
763 | ||
764 | for (i = 0; i < intf->altsetting[alt].desc.bNumEndpoints; i++) { | |
765 | e = &intf->altsetting[alt].endpoint[i].desc; | |
766 | if (!usb_endpoint_dir_in(e)) | |
767 | continue; | |
768 | if (e->bEndpointAddress == EM28XX_EP_AUDIO) { | |
769 | ep = e; | |
770 | break; | |
771 | } | |
772 | } | |
773 | ||
774 | if (!ep) { | |
775 | em28xx_errdev("Couldn't find an audio endpoint"); | |
776 | return -ENODEV; | |
777 | } | |
778 | ||
1b3fd2d3 MCC |
779 | ep_size = em28xx_audio_ep_packet_size(dev->udev, ep); |
780 | interval = 1 << (ep->bInterval - 1); | |
781 | ||
782 | em28xx_info("Endpoint 0x%02x %s on intf %d alt %d interval = %d, size %d\n", | |
fdf1bc9f | 783 | EM28XX_EP_AUDIO, usb_speed_string(dev->udev->speed), |
961717b4 | 784 | dev->ifnum, alt, |
1b3fd2d3 MCC |
785 | interval, |
786 | ep_size); | |
787 | ||
788 | /* Calculate the number and size of URBs to better fit the audio samples */ | |
789 | ||
790 | /* | |
791 | * Estimate the number of bytes per DMA transfer. | |
792 | * | |
793 | * This is given by the bit rate (for now, only 48000 Hz) multiplied | |
794 | * by 2 channels and 2 bytes/sample divided by the number of microframe | |
795 | * intervals and by the microframe rate (125 us) | |
796 | */ | |
797 | bytes_per_transfer = DIV_ROUND_UP(48000 * 2 * 2, 125 * interval); | |
798 | ||
799 | /* | |
800 | * Estimate the number of transfer URBs. Don't let it go past the | |
801 | * maximum number of URBs that is known to be supported by the device. | |
802 | */ | |
803 | num_urb = DIV_ROUND_UP(bytes_per_transfer, ep_size); | |
804 | if (num_urb > EM28XX_MAX_AUDIO_BUFS) | |
805 | num_urb = EM28XX_MAX_AUDIO_BUFS; | |
806 | ||
807 | /* | |
808 | * Now that we know the number of bytes per transfer and the number of | |
809 | * URBs, estimate the typical size of an URB, in order to adjust the | |
810 | * minimal number of packets. | |
811 | */ | |
812 | urb_size = bytes_per_transfer / num_urb; | |
813 | ||
814 | /* | |
815 | * Now, calculate the amount of audio packets to be filled on each | |
816 | * URB. In order to preserve the old behaviour, use a minimal | |
817 | * threshold for this value. | |
818 | */ | |
819 | npackets = EM28XX_MIN_AUDIO_PACKETS; | |
820 | if (urb_size > ep_size * npackets) | |
821 | npackets = DIV_ROUND_UP(urb_size, ep_size); | |
822 | ||
7818b0aa | 823 | em28xx_info("Number of URBs: %d, with %d packets and %d size\n", |
1b3fd2d3 MCC |
824 | num_urb, npackets, urb_size); |
825 | ||
a02b9c23 MCC |
826 | /* Estimate the bytes per period */ |
827 | dev->adev.period = urb_size * npackets; | |
828 | ||
1b3fd2d3 MCC |
829 | /* Allocate space to store the number of URBs to be used */ |
830 | ||
831 | dev->adev.transfer_buffer = kcalloc(num_urb, | |
832 | sizeof(*dev->adev.transfer_buffer), | |
833 | GFP_ATOMIC); | |
834 | if (!dev->adev.transfer_buffer) { | |
1b3fd2d3 MCC |
835 | return -ENOMEM; |
836 | } | |
837 | ||
838 | dev->adev.urb = kcalloc(num_urb, sizeof(*dev->adev.urb), GFP_ATOMIC); | |
839 | if (!dev->adev.urb) { | |
1b3fd2d3 MCC |
840 | kfree(dev->adev.transfer_buffer); |
841 | return -ENOMEM; | |
842 | } | |
843 | ||
844 | /* Alloc memory for each URB and for each transfer buffer */ | |
845 | dev->adev.num_urb = num_urb; | |
846 | for (i = 0; i < num_urb; i++) { | |
f5f894d1 MCC |
847 | struct urb *urb; |
848 | int j, k; | |
849 | void *buf; | |
850 | ||
1b3fd2d3 | 851 | urb = usb_alloc_urb(npackets, GFP_ATOMIC); |
f5f894d1 | 852 | if (!urb) { |
f5f894d1 MCC |
853 | em28xx_audio_free_urb(dev); |
854 | return -ENOMEM; | |
855 | } | |
856 | dev->adev.urb[i] = urb; | |
857 | ||
1b3fd2d3 | 858 | buf = usb_alloc_coherent(dev->udev, npackets * ep_size, GFP_ATOMIC, |
f5f894d1 MCC |
859 | &urb->transfer_dma); |
860 | if (!buf) { | |
861 | em28xx_errdev("usb_alloc_coherent failed!\n"); | |
862 | em28xx_audio_free_urb(dev); | |
863 | return -ENOMEM; | |
864 | } | |
865 | dev->adev.transfer_buffer[i] = buf; | |
866 | ||
867 | urb->dev = dev->udev; | |
868 | urb->context = dev; | |
869 | urb->pipe = usb_rcvisocpipe(dev->udev, EM28XX_EP_AUDIO); | |
870 | urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; | |
1b3fd2d3 MCC |
871 | urb->transfer_buffer = buf; |
872 | urb->interval = interval; | |
f5f894d1 | 873 | urb->complete = em28xx_audio_isocirq; |
1b3fd2d3 MCC |
874 | urb->number_of_packets = npackets; |
875 | urb->transfer_buffer_length = ep_size * npackets; | |
d2849fa5 | 876 | |
1b3fd2d3 | 877 | for (j = k = 0; j < npackets; j++, k += ep_size) { |
f5f894d1 | 878 | urb->iso_frame_desc[j].offset = k; |
1b3fd2d3 | 879 | urb->iso_frame_desc[j].length = ep_size; |
f5f894d1 MCC |
880 | } |
881 | } | |
882 | ||
966f4163 MCC |
883 | return 0; |
884 | } | |
885 | ||
886 | static int em28xx_audio_init(struct em28xx *dev) | |
887 | { | |
888 | struct em28xx_audio *adev = &dev->adev; | |
889 | struct snd_pcm *pcm; | |
890 | struct snd_card *card; | |
891 | static int devnr; | |
892 | int err; | |
893 | ||
c5874208 | 894 | if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR) { |
966f4163 MCC |
895 | /* This device does not support the extension (in this case |
896 | the device is expecting the snd-usb-audio module or | |
897 | doesn't have analog audio support at all) */ | |
898 | return 0; | |
899 | } | |
900 | ||
901 | em28xx_info("Binding audio extension\n"); | |
902 | ||
47677e51 MCC |
903 | kref_get(&dev->ref); |
904 | ||
966f4163 MCC |
905 | printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2006 Markus " |
906 | "Rechberger\n"); | |
907 | printk(KERN_INFO | |
908 | "em28xx-audio.c: Copyright (C) 2007-2014 Mauro Carvalho Chehab\n"); | |
909 | ||
e7356888 TI |
910 | err = snd_card_new(&dev->udev->dev, index[devnr], "Em28xx Audio", |
911 | THIS_MODULE, 0, &card); | |
966f4163 MCC |
912 | if (err < 0) |
913 | return err; | |
914 | ||
915 | spin_lock_init(&adev->slock); | |
916 | adev->sndcard = card; | |
917 | adev->udev = dev->udev; | |
918 | ||
919 | err = snd_pcm_new(card, "Em28xx Audio", 0, 0, 1, &pcm); | |
0cd03a0c MCC |
920 | if (err < 0) |
921 | goto card_free; | |
966f4163 MCC |
922 | |
923 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_em28xx_pcm_capture); | |
924 | pcm->info_flags = 0; | |
925 | pcm->private_data = dev; | |
926 | strcpy(pcm->name, "Empia 28xx Capture"); | |
927 | ||
966f4163 MCC |
928 | strcpy(card->driver, "Em28xx-Audio"); |
929 | strcpy(card->shortname, "Em28xx Audio"); | |
930 | strcpy(card->longname, "Empia Em28xx Audio"); | |
931 | ||
a5c075cf | 932 | INIT_WORK(&adev->wq_trigger, audio_trigger); |
966f4163 MCC |
933 | |
934 | if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { | |
935 | em28xx_cvol_new(card, dev, "Video", AC97_VIDEO); | |
936 | em28xx_cvol_new(card, dev, "Line In", AC97_LINE); | |
937 | em28xx_cvol_new(card, dev, "Phone", AC97_PHONE); | |
938 | em28xx_cvol_new(card, dev, "Microphone", AC97_MIC); | |
939 | em28xx_cvol_new(card, dev, "CD", AC97_CD); | |
940 | em28xx_cvol_new(card, dev, "AUX", AC97_AUX); | |
941 | em28xx_cvol_new(card, dev, "PCM", AC97_PCM); | |
942 | ||
943 | em28xx_cvol_new(card, dev, "Master", AC97_MASTER); | |
944 | em28xx_cvol_new(card, dev, "Line", AC97_HEADPHONE); | |
945 | em28xx_cvol_new(card, dev, "Mono", AC97_MASTER_MONO); | |
946 | em28xx_cvol_new(card, dev, "LFE", AC97_CENTER_LFE_MASTER); | |
947 | em28xx_cvol_new(card, dev, "Surround", AC97_SURROUND_MASTER); | |
948 | } | |
949 | ||
950 | err = em28xx_audio_urb_init(dev); | |
0cd03a0c MCC |
951 | if (err) |
952 | goto card_free; | |
966f4163 | 953 | |
6d79468d | 954 | err = snd_card_register(card); |
0cd03a0c MCC |
955 | if (err < 0) |
956 | goto urb_free; | |
6d79468d | 957 | |
9634614f | 958 | em28xx_info("Audio extension successfully initialized\n"); |
a52932b4 | 959 | return 0; |
0cd03a0c MCC |
960 | |
961 | urb_free: | |
962 | em28xx_audio_free_urb(dev); | |
963 | ||
964 | card_free: | |
965 | snd_card_free(card); | |
452f236f | 966 | adev->sndcard = NULL; |
0cd03a0c MCC |
967 | |
968 | return err; | |
a52932b4 MR |
969 | } |
970 | ||
971 | static int em28xx_audio_fini(struct em28xx *dev) | |
972 | { | |
1a6f11e0 | 973 | if (dev == NULL) |
a52932b4 | 974 | return 0; |
6d79468d | 975 | |
c5874208 | 976 | if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR) { |
df619181 | 977 | /* This device does not support the extension (in this case |
24a613e4 DH |
978 | the device is expecting the snd-usb-audio module or |
979 | doesn't have analog audio support at all) */ | |
df619181 DH |
980 | return 0; |
981 | } | |
982 | ||
0418ca60 | 983 | em28xx_info("Closing audio extension\n"); |
aa929ad7 | 984 | |
452f236f MCC |
985 | if (dev->adev.sndcard) { |
986 | snd_card_disconnect(dev->adev.sndcard); | |
a5c075cf | 987 | flush_work(&dev->adev.wq_trigger); |
b49eb2bd | 988 | |
452f236f | 989 | em28xx_audio_free_urb(dev); |
f5f894d1 | 990 | |
9baed99e MCC |
991 | snd_card_free(dev->adev.sndcard); |
992 | dev->adev.sndcard = NULL; | |
a52932b4 | 993 | } |
6d79468d | 994 | |
47677e51 | 995 | kref_put(&dev->ref, em28xx_free_device); |
a52932b4 MR |
996 | return 0; |
997 | } | |
998 | ||
6d746f91 SK |
999 | static int em28xx_audio_suspend(struct em28xx *dev) |
1000 | { | |
1001 | if (dev == NULL) | |
1002 | return 0; | |
1003 | ||
c5874208 | 1004 | if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR) |
6d746f91 SK |
1005 | return 0; |
1006 | ||
fbaa48d1 | 1007 | em28xx_info("Suspending audio extension\n"); |
6d746f91 | 1008 | em28xx_deinit_isoc_audio(dev); |
a5c075cf | 1009 | atomic_set(&dev->adev.stream_started, 0); |
6d746f91 SK |
1010 | return 0; |
1011 | } | |
1012 | ||
1013 | static int em28xx_audio_resume(struct em28xx *dev) | |
1014 | { | |
1015 | if (dev == NULL) | |
1016 | return 0; | |
1017 | ||
c5874208 | 1018 | if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR) |
6d746f91 SK |
1019 | return 0; |
1020 | ||
fbaa48d1 | 1021 | em28xx_info("Resuming audio extension\n"); |
6d746f91 | 1022 | /* Nothing to do other than schedule_work() ?? */ |
a5c075cf | 1023 | schedule_work(&dev->adev.wq_trigger); |
a52932b4 MR |
1024 | return 0; |
1025 | } | |
1026 | ||
1027 | static struct em28xx_ops audio_ops = { | |
6d79468d | 1028 | .id = EM28XX_AUDIO, |
1a6f11e0 MCC |
1029 | .name = "Em28xx Audio Extension", |
1030 | .init = em28xx_audio_init, | |
1031 | .fini = em28xx_audio_fini, | |
6d746f91 SK |
1032 | .suspend = em28xx_audio_suspend, |
1033 | .resume = em28xx_audio_resume, | |
a52932b4 MR |
1034 | }; |
1035 | ||
1036 | static int __init em28xx_alsa_register(void) | |
1037 | { | |
a52932b4 MR |
1038 | return em28xx_register_extension(&audio_ops); |
1039 | } | |
1040 | ||
1041 | static void __exit em28xx_alsa_unregister(void) | |
1042 | { | |
1043 | em28xx_unregister_extension(&audio_ops); | |
1044 | } | |
1045 | ||
1046 | MODULE_LICENSE("GPL"); | |
1047 | MODULE_AUTHOR("Markus Rechberger <mrechberger@gmail.com>"); | |
37e59f87 | 1048 | MODULE_AUTHOR("Mauro Carvalho Chehab"); |
d8992b09 MCC |
1049 | MODULE_DESCRIPTION(DRIVER_DESC " - audio interface"); |
1050 | MODULE_VERSION(EM28XX_VERSION); | |
a52932b4 MR |
1051 | |
1052 | module_init(em28xx_alsa_register); | |
1053 | module_exit(em28xx_alsa_unregister); |