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ASoC: wm8962: Support mono playback and record
[deliverable/linux.git] / sound / soc / soc-pcm.c
CommitLineData
ddee627c
LG		 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>
d6652ef8 22#include <linux/pm_runtime.h>
ddee627c
LG		 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
17841020
DA		 31static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
32 struct snd_soc_dai *soc_dai)
ddee627c
LG		 33{
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c
LG		 35 int ret;
36
17841020 37 if (!soc_dai->driver->symmetric_rates &&
ddee627c
LG		 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 */
17841020
DA		 45 if (!soc_dai->rate) {
46 dev_warn(soc_dai->dev,
ddee627c
LG		 47 "Not enforcing symmetric_rates due to race\n");
48 return 0;
49 }
50
17841020 51 dev_dbg(soc_dai->dev, "Symmetry forces %dHz rate\n", soc_dai->rate);
ddee627c
LG		 52
53 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
54 SNDRV_PCM_HW_PARAM_RATE,
17841020 55 soc_dai->rate, soc_dai->rate);
ddee627c 56 if (ret < 0) {
17841020 57 dev_err(soc_dai->dev,
ddee627c
LG		 58 "Unable to apply rate symmetry constraint: %d\n", ret);
59 return ret;
60 }
61
62 return 0;
63}
64
58ba9b25
MB		 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 */
70static int sample_sizes[] = {
88e33954 71 24, 32,
58ba9b25
MB		 72};
73
74static 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++) {
278047fd
MB		 88 if (bits >= sample_sizes[i])
89 continue;
90
91 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
92 sample_sizes[i], bits);
58ba9b25
MB		 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
ddee627c
LG		 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 */
105static 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
d6652ef8
MB		 116 pm_runtime_get_sync(cpu_dai->dev);
117 pm_runtime_get_sync(codec_dai->dev);
118 pm_runtime_get_sync(platform->dev);
119
b8c0dab9 120 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 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) {
25bfe662
MB		 126 dev_err(cpu_dai->dev, "can't open interface %s: %d\n",
127 cpu_dai->name, ret);
ddee627c
LG		 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) {
25bfe662
MB		 135 dev_err(platform->dev, "can't open platform %s: %d\n",
136 platform->name, ret);
ddee627c
LG		 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) {
25bfe662
MB		 144 dev_err(codec_dai->dev, "can't open codec %s: %d\n",
145 codec_dai->name, ret);
ddee627c
LG		 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) {
25bfe662
MB		 153 pr_err("asoc: %s startup failed: %d\n",
154 rtd->dai_link->name, ret);
ddee627c
LG		 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
58ba9b25
MB		 227 soc_pcm_apply_msb(substream, codec_dai);
228 soc_pcm_apply_msb(substream, cpu_dai);
229
ddee627c 230 /* Symmetry only applies if we've already got an active stream. */
17841020
DA		 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);
ddee627c
LG		 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++;
b8c0dab9 261 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 262 return 0;
263
264config_err:
265 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
266 rtd->dai_link->ops->shutdown(substream);
267
268machine_err:
269 if (codec_dai->driver->ops->shutdown)
270 codec_dai->driver->ops->shutdown(substream, codec_dai);
271
272codec_dai_err:
273 if (platform->driver->ops && platform->driver->ops->close)
274 platform->driver->ops->close(substream);
275
276platform_err:
277 if (cpu_dai->driver->ops->shutdown)
278 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
279out:
b8c0dab9 280 mutex_unlock(&rtd->pcm_mutex);
d6652ef8
MB		 281
282 pm_runtime_put(platform->dev);
283 pm_runtime_put(codec_dai->dev);
284 pm_runtime_put(cpu_dai->dev);
285
ddee627c
LG		 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 */
294static 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
b8c0dab9 300 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 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,
311 codec_dai->driver->playback.stream_name,
312 SND_SOC_DAPM_STREAM_STOP);
313 }
314
b8c0dab9 315 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 316}
317
318/*
319 * Called by ALSA when a PCM substream is closed. Private data can be
320 * freed here. The cpu DAI, codec DAI, machine and platform are also
321 * shutdown.
322 */
91d5e6b4 323static int soc_pcm_close(struct snd_pcm_substream *substream)
ddee627c
LG		 324{
325 struct snd_soc_pcm_runtime *rtd = substream->private_data;
326 struct snd_soc_platform *platform = rtd->platform;
327 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
328 struct snd_soc_dai *codec_dai = rtd->codec_dai;
329 struct snd_soc_codec *codec = rtd->codec;
330
b8c0dab9 331 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 332
333 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
334 cpu_dai->playback_active--;
335 codec_dai->playback_active--;
336 } else {
337 cpu_dai->capture_active--;
338 codec_dai->capture_active--;
339 }
340
341 cpu_dai->active--;
342 codec_dai->active--;
343 codec->active--;
344
17841020
DA		 345 /* clear the corresponding DAIs rate when inactive */
346 if (!cpu_dai->active)
347 cpu_dai->rate = 0;
348
349 if (!codec_dai->active)
350 codec_dai->rate = 0;
25b76791 351
ddee627c
LG		 352 /* Muting the DAC suppresses artifacts caused during digital
353 * shutdown, for example from stopping clocks.
354 */
355 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
356 snd_soc_dai_digital_mute(codec_dai, 1);
357
358 if (cpu_dai->driver->ops->shutdown)
359 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
360
361 if (codec_dai->driver->ops->shutdown)
362 codec_dai->driver->ops->shutdown(substream, codec_dai);
363
364 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
365 rtd->dai_link->ops->shutdown(substream);
366
367 if (platform->driver->ops && platform->driver->ops->close)
368 platform->driver->ops->close(substream);
369 cpu_dai->runtime = NULL;
370
371 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
5b6247ab
MB		 372 if (codec->ignore_pmdown_time ||
373 rtd->dai_link->ignore_pmdown_time) {
1d69c5c5
PU		 374 /* powered down playback stream now */
375 snd_soc_dapm_stream_event(rtd,
376 codec_dai->driver->playback.stream_name,
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 }
ddee627c
LG		 384 } else {
385 /* capture streams can be powered down now */
386 snd_soc_dapm_stream_event(rtd,
387 codec_dai->driver->capture.stream_name,
388 SND_SOC_DAPM_STREAM_STOP);
389 }
390
b8c0dab9 391 mutex_unlock(&rtd->pcm_mutex);
d6652ef8
MB		 392
393 pm_runtime_put(platform->dev);
394 pm_runtime_put(codec_dai->dev);
395 pm_runtime_put(cpu_dai->dev);
396
ddee627c
LG		 397 return 0;
398}
399
400/*
401 * Called by ALSA when the PCM substream is prepared, can set format, sample
402 * rate, etc. This function is non atomic and can be called multiple times,
403 * it can refer to the runtime info.
404 */
405static int soc_pcm_prepare(struct snd_pcm_substream *substream)
406{
407 struct snd_soc_pcm_runtime *rtd = substream->private_data;
408 struct snd_soc_platform *platform = rtd->platform;
409 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
410 struct snd_soc_dai *codec_dai = rtd->codec_dai;
411 int ret = 0;
412
b8c0dab9 413 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 414
415 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
416 ret = rtd->dai_link->ops->prepare(substream);
417 if (ret < 0) {
25bfe662 418 pr_err("asoc: machine prepare error: %d\n", ret);
ddee627c
LG		 419 goto out;
420 }
421 }
422
423 if (platform->driver->ops && platform->driver->ops->prepare) {
424 ret = platform->driver->ops->prepare(substream);
425 if (ret < 0) {
25bfe662
MB		 426 dev_err(platform->dev, "platform prepare error: %d\n",
427 ret);
ddee627c
LG		 428 goto out;
429 }
430 }
431
432 if (codec_dai->driver->ops->prepare) {
433 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
434 if (ret < 0) {
25bfe662
MB		 435 dev_err(codec_dai->dev, "DAI prepare error: %d\n",
436 ret);
ddee627c
LG		 437 goto out;
438 }
439 }
440
441 if (cpu_dai->driver->ops->prepare) {
442 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
443 if (ret < 0) {
25bfe662
MB		 444 dev_err(cpu_dai->dev, "DAI prepare error: %d\n",
445 ret);
ddee627c
LG		 446 goto out;
447 }
448 }
449
450 /* cancel any delayed stream shutdown that is pending */
451 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
452 codec_dai->pop_wait) {
453 codec_dai->pop_wait = 0;
454 cancel_delayed_work(&rtd->delayed_work);
455 }
456
457 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
458 snd_soc_dapm_stream_event(rtd,
459 codec_dai->driver->playback.stream_name,
460 SND_SOC_DAPM_STREAM_START);
461 else
462 snd_soc_dapm_stream_event(rtd,
463 codec_dai->driver->capture.stream_name,
464 SND_SOC_DAPM_STREAM_START);
465
466 snd_soc_dai_digital_mute(codec_dai, 0);
467
468out:
b8c0dab9 469 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 470 return ret;
471}
472
473/*
474 * Called by ALSA when the hardware params are set by application. This
475 * function can also be called multiple times and can allocate buffers
476 * (using snd_pcm_lib_* ). It's non-atomic.
477 */
478static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
479 struct snd_pcm_hw_params *params)
480{
481 struct snd_soc_pcm_runtime *rtd = substream->private_data;
482 struct snd_soc_platform *platform = rtd->platform;
483 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
484 struct snd_soc_dai *codec_dai = rtd->codec_dai;
485 int ret = 0;
486
b8c0dab9 487 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 488
489 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
490 ret = rtd->dai_link->ops->hw_params(substream, params);
491 if (ret < 0) {
25bfe662 492 pr_err("asoc: machine hw_params failed: %d\n", ret);
ddee627c
LG		 493 goto out;
494 }
495 }
496
497 if (codec_dai->driver->ops->hw_params) {
498 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
499 if (ret < 0) {
25bfe662
MB		 500 dev_err(codec_dai->dev, "can't set %s hw params: %d\n",
501 codec_dai->name, ret);
ddee627c
LG		 502 goto codec_err;
503 }
504 }
505
506 if (cpu_dai->driver->ops->hw_params) {
507 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
508 if (ret < 0) {
25bfe662
MB		 509 dev_err(cpu_dai->dev, "%s hw params failed: %d\n",
510 cpu_dai->name, ret);
ddee627c
LG		 511 goto interface_err;
512 }
513 }
514
515 if (platform->driver->ops && platform->driver->ops->hw_params) {
516 ret = platform->driver->ops->hw_params(substream, params);
517 if (ret < 0) {
25bfe662
MB		 518 dev_err(platform->dev, "%s hw params failed: %d\n",
519 platform->name, ret);
ddee627c
LG		 520 goto platform_err;
521 }
522 }
523
17841020
DA		 524 /* store the rate for each DAIs */
525 cpu_dai->rate = params_rate(params);
526 codec_dai->rate = params_rate(params);
ddee627c
LG		 527
528out:
b8c0dab9 529 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 530 return ret;
531
532platform_err:
533 if (cpu_dai->driver->ops->hw_free)
534 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
535
536interface_err:
537 if (codec_dai->driver->ops->hw_free)
538 codec_dai->driver->ops->hw_free(substream, codec_dai);
539
540codec_err:
541 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
542 rtd->dai_link->ops->hw_free(substream);
543
b8c0dab9 544 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 545 return ret;
546}
547
548/*
549 * Frees resources allocated by hw_params, can be called multiple times
550 */
551static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
552{
553 struct snd_soc_pcm_runtime *rtd = substream->private_data;
554 struct snd_soc_platform *platform = rtd->platform;
555 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
556 struct snd_soc_dai *codec_dai = rtd->codec_dai;
557 struct snd_soc_codec *codec = rtd->codec;
558
b8c0dab9 559 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
ddee627c
LG		 560
561 /* apply codec digital mute */
562 if (!codec->active)
563 snd_soc_dai_digital_mute(codec_dai, 1);
564
565 /* free any machine hw params */
566 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
567 rtd->dai_link->ops->hw_free(substream);
568
569 /* free any DMA resources */
570 if (platform->driver->ops && platform->driver->ops->hw_free)
571 platform->driver->ops->hw_free(substream);
572
573 /* now free hw params for the DAIs */
574 if (codec_dai->driver->ops->hw_free)
575 codec_dai->driver->ops->hw_free(substream, codec_dai);
576
577 if (cpu_dai->driver->ops->hw_free)
578 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
579
b8c0dab9 580 mutex_unlock(&rtd->pcm_mutex);
ddee627c
LG		 581 return 0;
582}
583
584static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
585{
586 struct snd_soc_pcm_runtime *rtd = substream->private_data;
587 struct snd_soc_platform *platform = rtd->platform;
588 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
589 struct snd_soc_dai *codec_dai = rtd->codec_dai;
590 int ret;
591
592 if (codec_dai->driver->ops->trigger) {
593 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
594 if (ret < 0)
595 return ret;
596 }
597
598 if (platform->driver->ops && platform->driver->ops->trigger) {
599 ret = platform->driver->ops->trigger(substream, cmd);
600 if (ret < 0)
601 return ret;
602 }
603
604 if (cpu_dai->driver->ops->trigger) {
605 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
606 if (ret < 0)
607 return ret;
608 }
609 return 0;
610}
611
612/*
613 * soc level wrapper for pointer callback
614 * If cpu_dai, codec_dai, platform driver has the delay callback, than
615 * the runtime->delay will be updated accordingly.
616 */
617static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
618{
619 struct snd_soc_pcm_runtime *rtd = substream->private_data;
620 struct snd_soc_platform *platform = rtd->platform;
621 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
622 struct snd_soc_dai *codec_dai = rtd->codec_dai;
623 struct snd_pcm_runtime *runtime = substream->runtime;
624 snd_pcm_uframes_t offset = 0;
625 snd_pcm_sframes_t delay = 0;
626
627 if (platform->driver->ops && platform->driver->ops->pointer)
628 offset = platform->driver->ops->pointer(substream);
629
630 if (cpu_dai->driver->ops->delay)
631 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
632
633 if (codec_dai->driver->ops->delay)
634 delay += codec_dai->driver->ops->delay(substream, codec_dai);
635
636 if (platform->driver->delay)
637 delay += platform->driver->delay(substream, codec_dai);
638
639 runtime->delay = delay;
640
641 return offset;
642}
643
ddee627c
LG		 644/* create a new pcm */
645int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
646{
647 struct snd_soc_codec *codec = rtd->codec;
648 struct snd_soc_platform *platform = rtd->platform;
649 struct snd_soc_dai *codec_dai = rtd->codec_dai;
650 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
a500231d 651 struct snd_pcm_ops *soc_pcm_ops = &rtd->ops;
ddee627c
LG		 652 struct snd_pcm *pcm;
653 char new_name[64];
654 int ret = 0, playback = 0, capture = 0;
655
a500231d
SP		 656 soc_pcm_ops->open = soc_pcm_open;
657 soc_pcm_ops->close = soc_pcm_close;
658 soc_pcm_ops->hw_params = soc_pcm_hw_params;
659 soc_pcm_ops->hw_free = soc_pcm_hw_free;
660 soc_pcm_ops->prepare = soc_pcm_prepare;
661 soc_pcm_ops->trigger = soc_pcm_trigger;
662 soc_pcm_ops->pointer = soc_pcm_pointer;
663
ddee627c
LG		 664 /* check client and interface hw capabilities */
665 snprintf(new_name, sizeof(new_name), "%s %s-%d",
666 rtd->dai_link->stream_name, codec_dai->name, num);
667
668 if (codec_dai->driver->playback.channels_min)
669 playback = 1;
670 if (codec_dai->driver->capture.channels_min)
671 capture = 1;
672
673 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
674 ret = snd_pcm_new(rtd->card->snd_card, new_name,
675 num, playback, capture, &pcm);
676 if (ret < 0) {
677 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
678 return ret;
679 }
680
681 /* DAPM dai link stream work */
682 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
683
684 rtd->pcm = pcm;
685 pcm->private_data = rtd;
686 if (platform->driver->ops) {
a500231d
SP		 687 soc_pcm_ops->mmap = platform->driver->ops->mmap;
688 soc_pcm_ops->pointer = platform->driver->ops->pointer;
689 soc_pcm_ops->ioctl = platform->driver->ops->ioctl;
690 soc_pcm_ops->copy = platform->driver->ops->copy;
691 soc_pcm_ops->silence = platform->driver->ops->silence;
692 soc_pcm_ops->ack = platform->driver->ops->ack;
693 soc_pcm_ops->page = platform->driver->ops->page;
ddee627c
LG		 694 }
695
696 if (playback)
a500231d 697 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, soc_pcm_ops);
ddee627c
LG		 698
699 if (capture)
a500231d 700 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, soc_pcm_ops);
ddee627c
LG		 701
702 if (platform->driver->pcm_new) {
703 ret = platform->driver->pcm_new(rtd);
704 if (ret < 0) {
705 pr_err("asoc: platform pcm constructor failed\n");
706 return ret;
707 }
708 }
709
710 pcm->private_free = platform->driver->pcm_free;
711 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
712 cpu_dai->name);
713 return ret;
714}
Linux kernel - Deliverables
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