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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> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/workqueue.h> | |
24 | #include <sound/core.h> | |
25 | #include <sound/pcm.h> | |
26 | #include <sound/pcm_params.h> | |
27 | #include <sound/soc.h> | |
28 | #include <sound/initval.h> | |
29 | ||
ddee627c LG |
30 | static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream) |
31 | { | |
32 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
33 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
34 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
35 | int ret; | |
36 | ||
37 | if (!codec_dai->driver->symmetric_rates && | |
38 | !cpu_dai->driver->symmetric_rates && | |
39 | !rtd->dai_link->symmetric_rates) | |
40 | return 0; | |
41 | ||
42 | /* This can happen if multiple streams are starting simultaneously - | |
43 | * the second can need to get its constraints before the first has | |
44 | * picked a rate. Complain and allow the application to carry on. | |
45 | */ | |
46 | if (!rtd->rate) { | |
47 | dev_warn(&rtd->dev, | |
48 | "Not enforcing symmetric_rates due to race\n"); | |
49 | return 0; | |
50 | } | |
51 | ||
52 | dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate); | |
53 | ||
54 | ret = snd_pcm_hw_constraint_minmax(substream->runtime, | |
55 | SNDRV_PCM_HW_PARAM_RATE, | |
56 | rtd->rate, rtd->rate); | |
57 | if (ret < 0) { | |
58 | dev_err(&rtd->dev, | |
59 | "Unable to apply rate symmetry constraint: %d\n", ret); | |
60 | return ret; | |
61 | } | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | /* | |
67 | * Called by ALSA when a PCM substream is opened, the runtime->hw record is | |
68 | * then initialized and any private data can be allocated. This also calls | |
69 | * startup for the cpu DAI, platform, machine and codec DAI. | |
70 | */ | |
71 | static int soc_pcm_open(struct snd_pcm_substream *substream) | |
72 | { | |
73 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
74 | struct snd_pcm_runtime *runtime = substream->runtime; | |
75 | struct snd_soc_platform *platform = rtd->platform; | |
76 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
77 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
78 | struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; | |
79 | struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver; | |
80 | int ret = 0; | |
81 | ||
b8c0dab9 | 82 | mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
ddee627c LG |
83 | |
84 | /* startup the audio subsystem */ | |
85 | if (cpu_dai->driver->ops->startup) { | |
86 | ret = cpu_dai->driver->ops->startup(substream, cpu_dai); | |
87 | if (ret < 0) { | |
88 | printk(KERN_ERR "asoc: can't open interface %s\n", | |
89 | cpu_dai->name); | |
90 | goto out; | |
91 | } | |
92 | } | |
93 | ||
94 | if (platform->driver->ops && platform->driver->ops->open) { | |
95 | ret = platform->driver->ops->open(substream); | |
96 | if (ret < 0) { | |
97 | printk(KERN_ERR "asoc: can't open platform %s\n", platform->name); | |
98 | goto platform_err; | |
99 | } | |
100 | } | |
101 | ||
102 | if (codec_dai->driver->ops->startup) { | |
103 | ret = codec_dai->driver->ops->startup(substream, codec_dai); | |
104 | if (ret < 0) { | |
105 | printk(KERN_ERR "asoc: can't open codec %s\n", | |
106 | codec_dai->name); | |
107 | goto codec_dai_err; | |
108 | } | |
109 | } | |
110 | ||
111 | if (rtd->dai_link->ops && rtd->dai_link->ops->startup) { | |
112 | ret = rtd->dai_link->ops->startup(substream); | |
113 | if (ret < 0) { | |
114 | printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name); | |
115 | goto machine_err; | |
116 | } | |
117 | } | |
118 | ||
119 | /* Check that the codec and cpu DAIs are compatible */ | |
120 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
121 | runtime->hw.rate_min = | |
122 | max(codec_dai_drv->playback.rate_min, | |
123 | cpu_dai_drv->playback.rate_min); | |
124 | runtime->hw.rate_max = | |
125 | min(codec_dai_drv->playback.rate_max, | |
126 | cpu_dai_drv->playback.rate_max); | |
127 | runtime->hw.channels_min = | |
128 | max(codec_dai_drv->playback.channels_min, | |
129 | cpu_dai_drv->playback.channels_min); | |
130 | runtime->hw.channels_max = | |
131 | min(codec_dai_drv->playback.channels_max, | |
132 | cpu_dai_drv->playback.channels_max); | |
133 | runtime->hw.formats = | |
134 | codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats; | |
135 | runtime->hw.rates = | |
136 | codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates; | |
137 | if (codec_dai_drv->playback.rates | |
138 | & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) | |
139 | runtime->hw.rates |= cpu_dai_drv->playback.rates; | |
140 | if (cpu_dai_drv->playback.rates | |
141 | & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) | |
142 | runtime->hw.rates |= codec_dai_drv->playback.rates; | |
143 | } else { | |
144 | runtime->hw.rate_min = | |
145 | max(codec_dai_drv->capture.rate_min, | |
146 | cpu_dai_drv->capture.rate_min); | |
147 | runtime->hw.rate_max = | |
148 | min(codec_dai_drv->capture.rate_max, | |
149 | cpu_dai_drv->capture.rate_max); | |
150 | runtime->hw.channels_min = | |
151 | max(codec_dai_drv->capture.channels_min, | |
152 | cpu_dai_drv->capture.channels_min); | |
153 | runtime->hw.channels_max = | |
154 | min(codec_dai_drv->capture.channels_max, | |
155 | cpu_dai_drv->capture.channels_max); | |
156 | runtime->hw.formats = | |
157 | codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats; | |
158 | runtime->hw.rates = | |
159 | codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates; | |
160 | if (codec_dai_drv->capture.rates | |
161 | & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) | |
162 | runtime->hw.rates |= cpu_dai_drv->capture.rates; | |
163 | if (cpu_dai_drv->capture.rates | |
164 | & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) | |
165 | runtime->hw.rates |= codec_dai_drv->capture.rates; | |
166 | } | |
167 | ||
168 | ret = -EINVAL; | |
169 | snd_pcm_limit_hw_rates(runtime); | |
170 | if (!runtime->hw.rates) { | |
171 | printk(KERN_ERR "asoc: %s <-> %s No matching rates\n", | |
172 | codec_dai->name, cpu_dai->name); | |
173 | goto config_err; | |
174 | } | |
175 | if (!runtime->hw.formats) { | |
176 | printk(KERN_ERR "asoc: %s <-> %s No matching formats\n", | |
177 | codec_dai->name, cpu_dai->name); | |
178 | goto config_err; | |
179 | } | |
180 | if (!runtime->hw.channels_min || !runtime->hw.channels_max || | |
181 | runtime->hw.channels_min > runtime->hw.channels_max) { | |
182 | printk(KERN_ERR "asoc: %s <-> %s No matching channels\n", | |
183 | codec_dai->name, cpu_dai->name); | |
184 | goto config_err; | |
185 | } | |
186 | ||
187 | /* Symmetry only applies if we've already got an active stream. */ | |
188 | if (cpu_dai->active || codec_dai->active) { | |
189 | ret = soc_pcm_apply_symmetry(substream); | |
190 | if (ret != 0) | |
191 | goto config_err; | |
192 | } | |
193 | ||
194 | pr_debug("asoc: %s <-> %s info:\n", | |
195 | codec_dai->name, cpu_dai->name); | |
196 | pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates); | |
197 | pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min, | |
198 | runtime->hw.channels_max); | |
199 | pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min, | |
200 | runtime->hw.rate_max); | |
201 | ||
202 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
203 | cpu_dai->playback_active++; | |
204 | codec_dai->playback_active++; | |
205 | } else { | |
206 | cpu_dai->capture_active++; | |
207 | codec_dai->capture_active++; | |
208 | } | |
209 | cpu_dai->active++; | |
210 | codec_dai->active++; | |
211 | rtd->codec->active++; | |
b8c0dab9 | 212 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
213 | return 0; |
214 | ||
215 | config_err: | |
216 | if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) | |
217 | rtd->dai_link->ops->shutdown(substream); | |
218 | ||
219 | machine_err: | |
220 | if (codec_dai->driver->ops->shutdown) | |
221 | codec_dai->driver->ops->shutdown(substream, codec_dai); | |
222 | ||
223 | codec_dai_err: | |
224 | if (platform->driver->ops && platform->driver->ops->close) | |
225 | platform->driver->ops->close(substream); | |
226 | ||
227 | platform_err: | |
228 | if (cpu_dai->driver->ops->shutdown) | |
229 | cpu_dai->driver->ops->shutdown(substream, cpu_dai); | |
230 | out: | |
b8c0dab9 | 231 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
232 | return ret; |
233 | } | |
234 | ||
235 | /* | |
236 | * Power down the audio subsystem pmdown_time msecs after close is called. | |
237 | * This is to ensure there are no pops or clicks in between any music tracks | |
238 | * due to DAPM power cycling. | |
239 | */ | |
240 | static void close_delayed_work(struct work_struct *work) | |
241 | { | |
242 | struct snd_soc_pcm_runtime *rtd = | |
243 | container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); | |
244 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
245 | ||
b8c0dab9 | 246 | mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
ddee627c LG |
247 | |
248 | pr_debug("pop wq checking: %s status: %s waiting: %s\n", | |
249 | codec_dai->driver->playback.stream_name, | |
250 | codec_dai->playback_active ? "active" : "inactive", | |
251 | codec_dai->pop_wait ? "yes" : "no"); | |
252 | ||
253 | /* are we waiting on this codec DAI stream */ | |
254 | if (codec_dai->pop_wait == 1) { | |
255 | codec_dai->pop_wait = 0; | |
256 | snd_soc_dapm_stream_event(rtd, | |
257 | codec_dai->driver->playback.stream_name, | |
258 | SND_SOC_DAPM_STREAM_STOP); | |
259 | } | |
260 | ||
b8c0dab9 | 261 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
262 | } |
263 | ||
264 | /* | |
265 | * Called by ALSA when a PCM substream is closed. Private data can be | |
266 | * freed here. The cpu DAI, codec DAI, machine and platform are also | |
267 | * shutdown. | |
268 | */ | |
91d5e6b4 | 269 | static int soc_pcm_close(struct snd_pcm_substream *substream) |
ddee627c LG |
270 | { |
271 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
272 | struct snd_soc_platform *platform = rtd->platform; | |
273 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
274 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
275 | struct snd_soc_codec *codec = rtd->codec; | |
276 | ||
b8c0dab9 | 277 | mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
ddee627c LG |
278 | |
279 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
280 | cpu_dai->playback_active--; | |
281 | codec_dai->playback_active--; | |
282 | } else { | |
283 | cpu_dai->capture_active--; | |
284 | codec_dai->capture_active--; | |
285 | } | |
286 | ||
287 | cpu_dai->active--; | |
288 | codec_dai->active--; | |
289 | codec->active--; | |
290 | ||
291 | /* Muting the DAC suppresses artifacts caused during digital | |
292 | * shutdown, for example from stopping clocks. | |
293 | */ | |
294 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
295 | snd_soc_dai_digital_mute(codec_dai, 1); | |
296 | ||
297 | if (cpu_dai->driver->ops->shutdown) | |
298 | cpu_dai->driver->ops->shutdown(substream, cpu_dai); | |
299 | ||
300 | if (codec_dai->driver->ops->shutdown) | |
301 | codec_dai->driver->ops->shutdown(substream, codec_dai); | |
302 | ||
303 | if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) | |
304 | rtd->dai_link->ops->shutdown(substream); | |
305 | ||
306 | if (platform->driver->ops && platform->driver->ops->close) | |
307 | platform->driver->ops->close(substream); | |
308 | cpu_dai->runtime = NULL; | |
309 | ||
310 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
311 | /* start delayed pop wq here for playback streams */ | |
312 | codec_dai->pop_wait = 1; | |
313 | schedule_delayed_work(&rtd->delayed_work, | |
314 | msecs_to_jiffies(rtd->pmdown_time)); | |
315 | } else { | |
316 | /* capture streams can be powered down now */ | |
317 | snd_soc_dapm_stream_event(rtd, | |
318 | codec_dai->driver->capture.stream_name, | |
319 | SND_SOC_DAPM_STREAM_STOP); | |
320 | } | |
321 | ||
b8c0dab9 | 322 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
323 | return 0; |
324 | } | |
325 | ||
326 | /* | |
327 | * Called by ALSA when the PCM substream is prepared, can set format, sample | |
328 | * rate, etc. This function is non atomic and can be called multiple times, | |
329 | * it can refer to the runtime info. | |
330 | */ | |
331 | static int soc_pcm_prepare(struct snd_pcm_substream *substream) | |
332 | { | |
333 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
334 | struct snd_soc_platform *platform = rtd->platform; | |
335 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
336 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
337 | int ret = 0; | |
338 | ||
b8c0dab9 | 339 | mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
ddee627c LG |
340 | |
341 | if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) { | |
342 | ret = rtd->dai_link->ops->prepare(substream); | |
343 | if (ret < 0) { | |
344 | printk(KERN_ERR "asoc: machine prepare error\n"); | |
345 | goto out; | |
346 | } | |
347 | } | |
348 | ||
349 | if (platform->driver->ops && platform->driver->ops->prepare) { | |
350 | ret = platform->driver->ops->prepare(substream); | |
351 | if (ret < 0) { | |
352 | printk(KERN_ERR "asoc: platform prepare error\n"); | |
353 | goto out; | |
354 | } | |
355 | } | |
356 | ||
357 | if (codec_dai->driver->ops->prepare) { | |
358 | ret = codec_dai->driver->ops->prepare(substream, codec_dai); | |
359 | if (ret < 0) { | |
360 | printk(KERN_ERR "asoc: codec DAI prepare error\n"); | |
361 | goto out; | |
362 | } | |
363 | } | |
364 | ||
365 | if (cpu_dai->driver->ops->prepare) { | |
366 | ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); | |
367 | if (ret < 0) { | |
368 | printk(KERN_ERR "asoc: cpu DAI prepare error\n"); | |
369 | goto out; | |
370 | } | |
371 | } | |
372 | ||
373 | /* cancel any delayed stream shutdown that is pending */ | |
374 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
375 | codec_dai->pop_wait) { | |
376 | codec_dai->pop_wait = 0; | |
377 | cancel_delayed_work(&rtd->delayed_work); | |
378 | } | |
379 | ||
380 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
381 | snd_soc_dapm_stream_event(rtd, | |
382 | codec_dai->driver->playback.stream_name, | |
383 | SND_SOC_DAPM_STREAM_START); | |
384 | else | |
385 | snd_soc_dapm_stream_event(rtd, | |
386 | codec_dai->driver->capture.stream_name, | |
387 | SND_SOC_DAPM_STREAM_START); | |
388 | ||
389 | snd_soc_dai_digital_mute(codec_dai, 0); | |
390 | ||
391 | out: | |
b8c0dab9 | 392 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
393 | return ret; |
394 | } | |
395 | ||
396 | /* | |
397 | * Called by ALSA when the hardware params are set by application. This | |
398 | * function can also be called multiple times and can allocate buffers | |
399 | * (using snd_pcm_lib_* ). It's non-atomic. | |
400 | */ | |
401 | static int soc_pcm_hw_params(struct snd_pcm_substream *substream, | |
402 | struct snd_pcm_hw_params *params) | |
403 | { | |
404 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
405 | struct snd_soc_platform *platform = rtd->platform; | |
406 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
407 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
408 | int ret = 0; | |
409 | ||
b8c0dab9 | 410 | mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
ddee627c LG |
411 | |
412 | if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) { | |
413 | ret = rtd->dai_link->ops->hw_params(substream, params); | |
414 | if (ret < 0) { | |
415 | printk(KERN_ERR "asoc: machine hw_params failed\n"); | |
416 | goto out; | |
417 | } | |
418 | } | |
419 | ||
420 | if (codec_dai->driver->ops->hw_params) { | |
421 | ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai); | |
422 | if (ret < 0) { | |
423 | printk(KERN_ERR "asoc: can't set codec %s hw params\n", | |
424 | codec_dai->name); | |
425 | goto codec_err; | |
426 | } | |
427 | } | |
428 | ||
429 | if (cpu_dai->driver->ops->hw_params) { | |
430 | ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai); | |
431 | if (ret < 0) { | |
432 | printk(KERN_ERR "asoc: interface %s hw params failed\n", | |
433 | cpu_dai->name); | |
434 | goto interface_err; | |
435 | } | |
436 | } | |
437 | ||
438 | if (platform->driver->ops && platform->driver->ops->hw_params) { | |
439 | ret = platform->driver->ops->hw_params(substream, params); | |
440 | if (ret < 0) { | |
441 | printk(KERN_ERR "asoc: platform %s hw params failed\n", | |
442 | platform->name); | |
443 | goto platform_err; | |
444 | } | |
445 | } | |
446 | ||
447 | rtd->rate = params_rate(params); | |
448 | ||
449 | out: | |
b8c0dab9 | 450 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
451 | return ret; |
452 | ||
453 | platform_err: | |
454 | if (cpu_dai->driver->ops->hw_free) | |
455 | cpu_dai->driver->ops->hw_free(substream, cpu_dai); | |
456 | ||
457 | interface_err: | |
458 | if (codec_dai->driver->ops->hw_free) | |
459 | codec_dai->driver->ops->hw_free(substream, codec_dai); | |
460 | ||
461 | codec_err: | |
462 | if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) | |
463 | rtd->dai_link->ops->hw_free(substream); | |
464 | ||
b8c0dab9 | 465 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
466 | return ret; |
467 | } | |
468 | ||
469 | /* | |
470 | * Frees resources allocated by hw_params, can be called multiple times | |
471 | */ | |
472 | static int soc_pcm_hw_free(struct snd_pcm_substream *substream) | |
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 | struct snd_soc_codec *codec = rtd->codec; | |
479 | ||
b8c0dab9 | 480 | mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
ddee627c LG |
481 | |
482 | /* apply codec digital mute */ | |
483 | if (!codec->active) | |
484 | snd_soc_dai_digital_mute(codec_dai, 1); | |
485 | ||
486 | /* free any machine hw params */ | |
487 | if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) | |
488 | rtd->dai_link->ops->hw_free(substream); | |
489 | ||
490 | /* free any DMA resources */ | |
491 | if (platform->driver->ops && platform->driver->ops->hw_free) | |
492 | platform->driver->ops->hw_free(substream); | |
493 | ||
494 | /* now free hw params for the DAIs */ | |
495 | if (codec_dai->driver->ops->hw_free) | |
496 | codec_dai->driver->ops->hw_free(substream, codec_dai); | |
497 | ||
498 | if (cpu_dai->driver->ops->hw_free) | |
499 | cpu_dai->driver->ops->hw_free(substream, cpu_dai); | |
500 | ||
b8c0dab9 | 501 | mutex_unlock(&rtd->pcm_mutex); |
ddee627c LG |
502 | return 0; |
503 | } | |
504 | ||
505 | static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
506 | { | |
507 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
508 | struct snd_soc_platform *platform = rtd->platform; | |
509 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
510 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
511 | int ret; | |
512 | ||
513 | if (codec_dai->driver->ops->trigger) { | |
514 | ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai); | |
515 | if (ret < 0) | |
516 | return ret; | |
517 | } | |
518 | ||
519 | if (platform->driver->ops && platform->driver->ops->trigger) { | |
520 | ret = platform->driver->ops->trigger(substream, cmd); | |
521 | if (ret < 0) | |
522 | return ret; | |
523 | } | |
524 | ||
525 | if (cpu_dai->driver->ops->trigger) { | |
526 | ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); | |
527 | if (ret < 0) | |
528 | return ret; | |
529 | } | |
530 | return 0; | |
531 | } | |
532 | ||
533 | /* | |
534 | * soc level wrapper for pointer callback | |
535 | * If cpu_dai, codec_dai, platform driver has the delay callback, than | |
536 | * the runtime->delay will be updated accordingly. | |
537 | */ | |
538 | static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) | |
539 | { | |
540 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
541 | struct snd_soc_platform *platform = rtd->platform; | |
542 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
543 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
544 | struct snd_pcm_runtime *runtime = substream->runtime; | |
545 | snd_pcm_uframes_t offset = 0; | |
546 | snd_pcm_sframes_t delay = 0; | |
547 | ||
548 | if (platform->driver->ops && platform->driver->ops->pointer) | |
549 | offset = platform->driver->ops->pointer(substream); | |
550 | ||
551 | if (cpu_dai->driver->ops->delay) | |
552 | delay += cpu_dai->driver->ops->delay(substream, cpu_dai); | |
553 | ||
554 | if (codec_dai->driver->ops->delay) | |
555 | delay += codec_dai->driver->ops->delay(substream, codec_dai); | |
556 | ||
557 | if (platform->driver->delay) | |
558 | delay += platform->driver->delay(substream, codec_dai); | |
559 | ||
560 | runtime->delay = delay; | |
561 | ||
562 | return offset; | |
563 | } | |
564 | ||
565 | /* ASoC PCM operations */ | |
566 | static struct snd_pcm_ops soc_pcm_ops = { | |
567 | .open = soc_pcm_open, | |
91d5e6b4 | 568 | .close = soc_pcm_close, |
ddee627c LG |
569 | .hw_params = soc_pcm_hw_params, |
570 | .hw_free = soc_pcm_hw_free, | |
571 | .prepare = soc_pcm_prepare, | |
572 | .trigger = soc_pcm_trigger, | |
573 | .pointer = soc_pcm_pointer, | |
574 | }; | |
575 | ||
576 | /* create a new pcm */ | |
577 | int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) | |
578 | { | |
579 | struct snd_soc_codec *codec = rtd->codec; | |
580 | struct snd_soc_platform *platform = rtd->platform; | |
581 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
582 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
583 | struct snd_pcm *pcm; | |
584 | char new_name[64]; | |
585 | int ret = 0, playback = 0, capture = 0; | |
586 | ||
587 | /* check client and interface hw capabilities */ | |
588 | snprintf(new_name, sizeof(new_name), "%s %s-%d", | |
589 | rtd->dai_link->stream_name, codec_dai->name, num); | |
590 | ||
591 | if (codec_dai->driver->playback.channels_min) | |
592 | playback = 1; | |
593 | if (codec_dai->driver->capture.channels_min) | |
594 | capture = 1; | |
595 | ||
596 | dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name); | |
597 | ret = snd_pcm_new(rtd->card->snd_card, new_name, | |
598 | num, playback, capture, &pcm); | |
599 | if (ret < 0) { | |
600 | printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name); | |
601 | return ret; | |
602 | } | |
603 | ||
604 | /* DAPM dai link stream work */ | |
605 | INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); | |
606 | ||
607 | rtd->pcm = pcm; | |
608 | pcm->private_data = rtd; | |
609 | if (platform->driver->ops) { | |
610 | soc_pcm_ops.mmap = platform->driver->ops->mmap; | |
611 | soc_pcm_ops.pointer = platform->driver->ops->pointer; | |
612 | soc_pcm_ops.ioctl = platform->driver->ops->ioctl; | |
613 | soc_pcm_ops.copy = platform->driver->ops->copy; | |
614 | soc_pcm_ops.silence = platform->driver->ops->silence; | |
615 | soc_pcm_ops.ack = platform->driver->ops->ack; | |
616 | soc_pcm_ops.page = platform->driver->ops->page; | |
617 | } | |
618 | ||
619 | if (playback) | |
620 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops); | |
621 | ||
622 | if (capture) | |
623 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops); | |
624 | ||
625 | if (platform->driver->pcm_new) { | |
626 | ret = platform->driver->pcm_new(rtd); | |
627 | if (ret < 0) { | |
628 | pr_err("asoc: platform pcm constructor failed\n"); | |
629 | return ret; | |
630 | } | |
631 | } | |
632 | ||
633 | pcm->private_free = platform->driver->pcm_free; | |
634 | printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name, | |
635 | cpu_dai->name); | |
636 | return ret; | |
637 | } |