?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
netfilter: Convert compare_ether_addr to ether_addr_equal
[linux-2.6/libata-dev.git] / sound / soc / soc-pcm.c
blob0ad8dcacd2f39eefbdc434ac8bed0a4a56e3ea6f
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/slab.h>
24 #include <linux/workqueue.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29 #include <sound/initval.h>
30
31 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
32 struct snd_soc_dai *soc_dai)
33 {
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 int ret;
36
37 if (!soc_dai->driver->symmetric_rates &&
38 !rtd->dai_link->symmetric_rates)
39 return 0;
40
41 /* This can happen if multiple streams are starting simultaneously -
42 * the second can need to get its constraints before the first has
43 * picked a rate. Complain and allow the application to carry on.
44 */
45 if (!soc_dai->rate) {
46 dev_warn(soc_dai->dev,
47 "Not enforcing symmetric_rates due to race\n");
48 return 0;
49 }
50
51 dev_dbg(soc_dai->dev, "Symmetry forces %dHz rate\n", soc_dai->rate);
52
53 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
54 SNDRV_PCM_HW_PARAM_RATE,
55 soc_dai->rate, soc_dai->rate);
56 if (ret < 0) {
57 dev_err(soc_dai->dev,
58 "Unable to apply rate symmetry constraint: %d\n", ret);
59 return ret;
60 }
61
62 return 0;
63 }
64
65 /*
66 * List of sample sizes that might go over the bus for parameter
67 * application. There ought to be a wildcard sample size for things
68 * like the DAC/ADC resolution to use but there isn't right now.
69 */
70 static int sample_sizes[] = {
71 24, 32,
72 };
73
74 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
75 struct snd_soc_dai *dai)
76 {
77 int ret, i, bits;
78
79 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
80 bits = dai->driver->playback.sig_bits;
81 else
82 bits = dai->driver->capture.sig_bits;
83
84 if (!bits)
85 return;
86
87 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
88 if (bits >= sample_sizes[i])
89 continue;
90
91 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
92 sample_sizes[i], bits);
93 if (ret != 0)
94 dev_warn(dai->dev,
95 "Failed to set MSB %d/%d: %d\n",
96 bits, sample_sizes[i], ret);
97 }
98 }
99
100 /*
101 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
102 * then initialized and any private data can be allocated. This also calls
103 * startup for the cpu DAI, platform, machine and codec DAI.
104 */
105 static int soc_pcm_open(struct snd_pcm_substream *substream)
106 {
107 struct snd_soc_pcm_runtime *rtd = substream->private_data;
108 struct snd_pcm_runtime *runtime = substream->runtime;
109 struct snd_soc_platform *platform = rtd->platform;
110 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
111 struct snd_soc_dai *codec_dai = rtd->codec_dai;
112 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
113 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
114 int ret = 0;
115
116 pm_runtime_get_sync(cpu_dai->dev);
117 pm_runtime_get_sync(codec_dai->dev);
118 pm_runtime_get_sync(platform->dev);
119
120 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
121
122 /* startup the audio subsystem */
123 if (cpu_dai->driver->ops->startup) {
124 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
125 if (ret < 0) {
126 dev_err(cpu_dai->dev, "can't open interface %s: %d\n",
127 cpu_dai->name, ret);
128 goto out;
129 }
130 }
131
132 if (platform->driver->ops && platform->driver->ops->open) {
133 ret = platform->driver->ops->open(substream);
134 if (ret < 0) {
135 dev_err(platform->dev, "can't open platform %s: %d\n",
136 platform->name, ret);
137 goto platform_err;
138 }
139 }
140
141 if (codec_dai->driver->ops->startup) {
142 ret = codec_dai->driver->ops->startup(substream, codec_dai);
143 if (ret < 0) {
144 dev_err(codec_dai->dev, "can't open codec %s: %d\n",
145 codec_dai->name, ret);
146 goto codec_dai_err;
147 }
148 }
149
150 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
151 ret = rtd->dai_link->ops->startup(substream);
152 if (ret < 0) {
153 pr_err("asoc: %s startup failed: %d\n",
154 rtd->dai_link->name, ret);
155 goto machine_err;
156 }
157 }
158
159 /* Check that the codec and cpu DAIs are compatible */
160 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
161 runtime->hw.rate_min =
162 max(codec_dai_drv->playback.rate_min,
163 cpu_dai_drv->playback.rate_min);
164 runtime->hw.rate_max =
165 min(codec_dai_drv->playback.rate_max,
166 cpu_dai_drv->playback.rate_max);
167 runtime->hw.channels_min =
168 max(codec_dai_drv->playback.channels_min,
169 cpu_dai_drv->playback.channels_min);
170 runtime->hw.channels_max =
171 min(codec_dai_drv->playback.channels_max,
172 cpu_dai_drv->playback.channels_max);
173 runtime->hw.formats =
174 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
175 runtime->hw.rates =
176 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
177 if (codec_dai_drv->playback.rates
178 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
179 runtime->hw.rates |= cpu_dai_drv->playback.rates;
180 if (cpu_dai_drv->playback.rates
181 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
182 runtime->hw.rates |= codec_dai_drv->playback.rates;
183 } else {
184 runtime->hw.rate_min =
185 max(codec_dai_drv->capture.rate_min,
186 cpu_dai_drv->capture.rate_min);
187 runtime->hw.rate_max =
188 min(codec_dai_drv->capture.rate_max,
189 cpu_dai_drv->capture.rate_max);
190 runtime->hw.channels_min =
191 max(codec_dai_drv->capture.channels_min,
192 cpu_dai_drv->capture.channels_min);
193 runtime->hw.channels_max =
194 min(codec_dai_drv->capture.channels_max,
195 cpu_dai_drv->capture.channels_max);
196 runtime->hw.formats =
197 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
198 runtime->hw.rates =
199 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
200 if (codec_dai_drv->capture.rates
201 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
202 runtime->hw.rates |= cpu_dai_drv->capture.rates;
203 if (cpu_dai_drv->capture.rates
204 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
205 runtime->hw.rates |= codec_dai_drv->capture.rates;
206 }
207
208 ret = -EINVAL;
209 snd_pcm_limit_hw_rates(runtime);
210 if (!runtime->hw.rates) {
211 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
212 codec_dai->name, cpu_dai->name);
213 goto config_err;
214 }
215 if (!runtime->hw.formats) {
216 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
217 codec_dai->name, cpu_dai->name);
218 goto config_err;
219 }
220 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
221 runtime->hw.channels_min > runtime->hw.channels_max) {
222 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
223 codec_dai->name, cpu_dai->name);
224 goto config_err;
225 }
226
227 soc_pcm_apply_msb(substream, codec_dai);
228 soc_pcm_apply_msb(substream, cpu_dai);
229
230 /* Symmetry only applies if we've already got an active stream. */
231 if (cpu_dai->active) {
232 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
233 if (ret != 0)
234 goto config_err;
235 }
236
237 if (codec_dai->active) {
238 ret = soc_pcm_apply_symmetry(substream, codec_dai);
239 if (ret != 0)
240 goto config_err;
241 }
242
243 pr_debug("asoc: %s <-> %s info:\n",
244 codec_dai->name, cpu_dai->name);
245 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
246 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
247 runtime->hw.channels_max);
248 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
249 runtime->hw.rate_max);
250
251 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
252 cpu_dai->playback_active++;
253 codec_dai->playback_active++;
254 } else {
255 cpu_dai->capture_active++;
256 codec_dai->capture_active++;
257 }
258 cpu_dai->active++;
259 codec_dai->active++;
260 rtd->codec->active++;
261 mutex_unlock(&rtd->pcm_mutex);
262 return 0;
263
264 config_err:
265 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
266 rtd->dai_link->ops->shutdown(substream);
267
268 machine_err:
269 if (codec_dai->driver->ops->shutdown)
270 codec_dai->driver->ops->shutdown(substream, codec_dai);
271
272 codec_dai_err:
273 if (platform->driver->ops && platform->driver->ops->close)
274 platform->driver->ops->close(substream);
275
276 platform_err:
277 if (cpu_dai->driver->ops->shutdown)
278 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
279 out:
280 mutex_unlock(&rtd->pcm_mutex);
281
282 pm_runtime_put(platform->dev);
283 pm_runtime_put(codec_dai->dev);
284 pm_runtime_put(cpu_dai->dev);
285
286 return ret;
287 }
288
289 /*
290 * Power down the audio subsystem pmdown_time msecs after close is called.
291 * This is to ensure there are no pops or clicks in between any music tracks
292 * due to DAPM power cycling.
293 */
294 static void close_delayed_work(struct work_struct *work)
295 {
296 struct snd_soc_pcm_runtime *rtd =
297 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
298 struct snd_soc_dai *codec_dai = rtd->codec_dai;
299
300 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
301
302 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
303 codec_dai->driver->playback.stream_name,
304 codec_dai->playback_active ? "active" : "inactive",
305 codec_dai->pop_wait ? "yes" : "no");
306
307 /* are we waiting on this codec DAI stream */
308 if (codec_dai->pop_wait == 1) {
309 codec_dai->pop_wait = 0;
310 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
311 codec_dai, SND_SOC_DAPM_STREAM_STOP);
312 }
313
314 mutex_unlock(&rtd->pcm_mutex);
315 }
316
317 /*
318 * Called by ALSA when a PCM substream is closed. Private data can be
319 * freed here. The cpu DAI, codec DAI, machine and platform are also
320 * shutdown.
321 */
322 static int soc_pcm_close(struct snd_pcm_substream *substream)
323 {
324 struct snd_soc_pcm_runtime *rtd = substream->private_data;
325 struct snd_soc_platform *platform = rtd->platform;
326 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
327 struct snd_soc_dai *codec_dai = rtd->codec_dai;
328 struct snd_soc_codec *codec = rtd->codec;
329
330 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
331
332 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
333 cpu_dai->playback_active--;
334 codec_dai->playback_active--;
335 } else {
336 cpu_dai->capture_active--;
337 codec_dai->capture_active--;
338 }
339
340 cpu_dai->active--;
341 codec_dai->active--;
342 codec->active--;
343
344 /* clear the corresponding DAIs rate when inactive */
345 if (!cpu_dai->active)
346 cpu_dai->rate = 0;
347
348 if (!codec_dai->active)
349 codec_dai->rate = 0;
350
351 /* Muting the DAC suppresses artifacts caused during digital
352 * shutdown, for example from stopping clocks.
353 */
354 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
355 snd_soc_dai_digital_mute(codec_dai, 1);
356
357 if (cpu_dai->driver->ops->shutdown)
358 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
359
360 if (codec_dai->driver->ops->shutdown)
361 codec_dai->driver->ops->shutdown(substream, codec_dai);
362
363 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
364 rtd->dai_link->ops->shutdown(substream);
365
366 if (platform->driver->ops && platform->driver->ops->close)
367 platform->driver->ops->close(substream);
368 cpu_dai->runtime = NULL;
369
370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
371 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
372 rtd->dai_link->ignore_pmdown_time) {
373 /* powered down playback stream now */
374 snd_soc_dapm_stream_event(rtd,
375 SNDRV_PCM_STREAM_PLAYBACK,
376 codec_dai,
377 SND_SOC_DAPM_STREAM_STOP);
378 } else {
379 /* start delayed pop wq here for playback streams */
380 codec_dai->pop_wait = 1;
381 schedule_delayed_work(&rtd->delayed_work,
382 msecs_to_jiffies(rtd->pmdown_time));
383 }
384 } else {
385 /* capture streams can be powered down now */
386 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
387 codec_dai, SND_SOC_DAPM_STREAM_STOP);
388 }
389
390 mutex_unlock(&rtd->pcm_mutex);
391
392 pm_runtime_put(platform->dev);
393 pm_runtime_put(codec_dai->dev);
394 pm_runtime_put(cpu_dai->dev);
395
396 return 0;
397 }
398
399 /*
400 * Called by ALSA when the PCM substream is prepared, can set format, sample
401 * rate, etc. This function is non atomic and can be called multiple times,
402 * it can refer to the runtime info.
403 */
404 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
405 {
406 struct snd_soc_pcm_runtime *rtd = substream->private_data;
407 struct snd_soc_platform *platform = rtd->platform;
408 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
409 struct snd_soc_dai *codec_dai = rtd->codec_dai;
410 int ret = 0;
411
412 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
413
414 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
415 ret = rtd->dai_link->ops->prepare(substream);
416 if (ret < 0) {
417 pr_err("asoc: machine prepare error: %d\n", ret);
418 goto out;
419 }
420 }
421
422 if (platform->driver->ops && platform->driver->ops->prepare) {
423 ret = platform->driver->ops->prepare(substream);
424 if (ret < 0) {
425 dev_err(platform->dev, "platform prepare error: %d\n",
426 ret);
427 goto out;
428 }
429 }
430
431 if (codec_dai->driver->ops->prepare) {
432 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
433 if (ret < 0) {
434 dev_err(codec_dai->dev, "DAI prepare error: %d\n",
435 ret);
436 goto out;
437 }
438 }
439
440 if (cpu_dai->driver->ops->prepare) {
441 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
442 if (ret < 0) {
443 dev_err(cpu_dai->dev, "DAI prepare error: %d\n",
444 ret);
445 goto out;
446 }
447 }
448
449 /* cancel any delayed stream shutdown that is pending */
450 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
451 codec_dai->pop_wait) {
452 codec_dai->pop_wait = 0;
453 cancel_delayed_work(&rtd->delayed_work);
454 }
455
456 snd_soc_dapm_stream_event(rtd, substream->stream, codec_dai,
457 SND_SOC_DAPM_STREAM_START);
458
459 snd_soc_dai_digital_mute(codec_dai, 0);
460
461 out:
462 mutex_unlock(&rtd->pcm_mutex);
463 return ret;
464 }
465
466 /*
467 * Called by ALSA when the hardware params are set by application. This
468 * function can also be called multiple times and can allocate buffers
469 * (using snd_pcm_lib_* ). It's non-atomic.
470 */
471 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
472 struct snd_pcm_hw_params *params)
473 {
474 struct snd_soc_pcm_runtime *rtd = substream->private_data;
475 struct snd_soc_platform *platform = rtd->platform;
476 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
477 struct snd_soc_dai *codec_dai = rtd->codec_dai;
478 int ret = 0;
479
480 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
481
482 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
483 ret = rtd->dai_link->ops->hw_params(substream, params);
484 if (ret < 0) {
485 pr_err("asoc: machine hw_params failed: %d\n", ret);
486 goto out;
487 }
488 }
489
490 if (codec_dai->driver->ops->hw_params) {
491 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
492 if (ret < 0) {
493 dev_err(codec_dai->dev, "can't set %s hw params: %d\n",
494 codec_dai->name, ret);
495 goto codec_err;
496 }
497 }
498
499 if (cpu_dai->driver->ops->hw_params) {
500 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
501 if (ret < 0) {
502 dev_err(cpu_dai->dev, "%s hw params failed: %d\n",
503 cpu_dai->name, ret);
504 goto interface_err;
505 }
506 }
507
508 if (platform->driver->ops && platform->driver->ops->hw_params) {
509 ret = platform->driver->ops->hw_params(substream, params);
510 if (ret < 0) {
511 dev_err(platform->dev, "%s hw params failed: %d\n",
512 platform->name, ret);
513 goto platform_err;
514 }
515 }
516
517 /* store the rate for each DAIs */
518 cpu_dai->rate = params_rate(params);
519 codec_dai->rate = params_rate(params);
520
521 out:
522 mutex_unlock(&rtd->pcm_mutex);
523 return ret;
524
525 platform_err:
526 if (cpu_dai->driver->ops->hw_free)
527 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
528
529 interface_err:
530 if (codec_dai->driver->ops->hw_free)
531 codec_dai->driver->ops->hw_free(substream, codec_dai);
532
533 codec_err:
534 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
535 rtd->dai_link->ops->hw_free(substream);
536
537 mutex_unlock(&rtd->pcm_mutex);
538 return ret;
539 }
540
541 /*
542 * Frees resources allocated by hw_params, can be called multiple times
543 */
544 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
545 {
546 struct snd_soc_pcm_runtime *rtd = substream->private_data;
547 struct snd_soc_platform *platform = rtd->platform;
548 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
549 struct snd_soc_dai *codec_dai = rtd->codec_dai;
550 struct snd_soc_codec *codec = rtd->codec;
551
552 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
553
554 /* apply codec digital mute */
555 if (!codec->active)
556 snd_soc_dai_digital_mute(codec_dai, 1);
557
558 /* free any machine hw params */
559 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
560 rtd->dai_link->ops->hw_free(substream);
561
562 /* free any DMA resources */
563 if (platform->driver->ops && platform->driver->ops->hw_free)
564 platform->driver->ops->hw_free(substream);
565
566 /* now free hw params for the DAIs */
567 if (codec_dai->driver->ops->hw_free)
568 codec_dai->driver->ops->hw_free(substream, codec_dai);
569
570 if (cpu_dai->driver->ops->hw_free)
571 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
572
573 mutex_unlock(&rtd->pcm_mutex);
574 return 0;
575 }
576
577 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
578 {
579 struct snd_soc_pcm_runtime *rtd = substream->private_data;
580 struct snd_soc_platform *platform = rtd->platform;
581 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
582 struct snd_soc_dai *codec_dai = rtd->codec_dai;
583 int ret;
584
585 if (codec_dai->driver->ops->trigger) {
586 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
587 if (ret < 0)
588 return ret;
589 }
590
591 if (platform->driver->ops && platform->driver->ops->trigger) {
592 ret = platform->driver->ops->trigger(substream, cmd);
593 if (ret < 0)
594 return ret;
595 }
596
597 if (cpu_dai->driver->ops->trigger) {
598 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
599 if (ret < 0)
600 return ret;
601 }
602 return 0;
603 }
604
605 /*
606 * soc level wrapper for pointer callback
607 * If cpu_dai, codec_dai, platform driver has the delay callback, than
608 * the runtime->delay will be updated accordingly.
609 */
610 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
611 {
612 struct snd_soc_pcm_runtime *rtd = substream->private_data;
613 struct snd_soc_platform *platform = rtd->platform;
614 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
615 struct snd_soc_dai *codec_dai = rtd->codec_dai;
616 struct snd_pcm_runtime *runtime = substream->runtime;
617 snd_pcm_uframes_t offset = 0;
618 snd_pcm_sframes_t delay = 0;
619
620 if (platform->driver->ops && platform->driver->ops->pointer)
621 offset = platform->driver->ops->pointer(substream);
622
623 if (cpu_dai->driver->ops->delay)
624 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
625
626 if (codec_dai->driver->ops->delay)
627 delay += codec_dai->driver->ops->delay(substream, codec_dai);
628
629 if (platform->driver->delay)
630 delay += platform->driver->delay(substream, codec_dai);
631
632 runtime->delay = delay;
633
634 return offset;
635 }
636
637 /* create a new pcm */
638 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
639 {
640 struct snd_soc_codec *codec = rtd->codec;
641 struct snd_soc_platform *platform = rtd->platform;
642 struct snd_soc_dai *codec_dai = rtd->codec_dai;
643 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
644 struct snd_pcm_ops *soc_pcm_ops = &rtd->ops;
645 struct snd_pcm *pcm;
646 char new_name[64];
647 int ret = 0, playback = 0, capture = 0;
648
649 soc_pcm_ops->open = soc_pcm_open;
650 soc_pcm_ops->close = soc_pcm_close;
651 soc_pcm_ops->hw_params = soc_pcm_hw_params;
652 soc_pcm_ops->hw_free = soc_pcm_hw_free;
653 soc_pcm_ops->prepare = soc_pcm_prepare;
654 soc_pcm_ops->trigger = soc_pcm_trigger;
655 soc_pcm_ops->pointer = soc_pcm_pointer;
656
657 /* check client and interface hw capabilities */
658 snprintf(new_name, sizeof(new_name), "%s %s-%d",
659 rtd->dai_link->stream_name, codec_dai->name, num);
660
661 if (codec_dai->driver->playback.channels_min)
662 playback = 1;
663 if (codec_dai->driver->capture.channels_min)
664 capture = 1;
665
666 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
667 ret = snd_pcm_new(rtd->card->snd_card, new_name,
668 num, playback, capture, &pcm);
669 if (ret < 0) {
670 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
671 return ret;
672 }
673
674 /* DAPM dai link stream work */
675 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
676
677 rtd->pcm = pcm;
678 pcm->private_data = rtd;
679 if (platform->driver->ops) {
680 soc_pcm_ops->mmap = platform->driver->ops->mmap;
681 soc_pcm_ops->pointer = platform->driver->ops->pointer;
682 soc_pcm_ops->ioctl = platform->driver->ops->ioctl;
683 soc_pcm_ops->copy = platform->driver->ops->copy;
684 soc_pcm_ops->silence = platform->driver->ops->silence;
685 soc_pcm_ops->ack = platform->driver->ops->ack;
686 soc_pcm_ops->page = platform->driver->ops->page;
687 }
688
689 if (playback)
690 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, soc_pcm_ops);
691
692 if (capture)
693 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, soc_pcm_ops);
694
695 if (platform->driver->pcm_new) {
696 ret = platform->driver->pcm_new(rtd);
697 if (ret < 0) {
698 pr_err("asoc: platform pcm constructor failed\n");
699 return ret;
700 }
701 }
702
703 pcm->private_free = platform->driver->pcm_free;
704 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
705 cpu_dai->name);
706 return ret;
707 }
Linux 2.6 libata-dev (mirror)