2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 * with code, comments and ideas from :-
9 * Richard Purdie <richard@openedhand.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
17 * o Add hw rules to enforce rates, etc.
18 * o More testing with other codecs/machines.
19 * o Add more codecs and platforms to ensure good API coverage.
20 * o Support TDM on PCM and I2S
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
28 #include <linux/bitops.h>
29 #include <linux/debugfs.h>
30 #include <linux/platform_device.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35 #include <sound/soc-dapm.h>
36 #include <sound/initval.h>
38 static DEFINE_MUTEX(pcm_mutex
);
39 static DEFINE_MUTEX(io_mutex
);
40 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq
);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry
*debugfs_root
;
46 static DEFINE_MUTEX(client_mutex
);
47 static LIST_HEAD(card_list
);
48 static LIST_HEAD(dai_list
);
49 static LIST_HEAD(platform_list
);
50 static LIST_HEAD(codec_list
);
52 static int snd_soc_register_card(struct snd_soc_card
*card
);
53 static int snd_soc_unregister_card(struct snd_soc_card
*card
);
56 * This is a timeout to do a DAPM powerdown after a stream is closed().
57 * It can be used to eliminate pops between different playback streams, e.g.
58 * between two audio tracks.
60 static int pmdown_time
= 5000;
61 module_param(pmdown_time
, int, 0);
62 MODULE_PARM_DESC(pmdown_time
, "DAPM stream powerdown time (msecs)");
65 * This function forces any delayed work to be queued and run.
67 static int run_delayed_work(struct delayed_work
*dwork
)
71 /* cancel any work waiting to be queued. */
72 ret
= cancel_delayed_work(dwork
);
74 /* if there was any work waiting then we run it now and
75 * wait for it's completion */
77 schedule_delayed_work(dwork
, 0);
78 flush_scheduled_work();
83 #ifdef CONFIG_SND_SOC_AC97_BUS
84 /* unregister ac97 codec */
85 static int soc_ac97_dev_unregister(struct snd_soc_codec
*codec
)
87 if (codec
->ac97
->dev
.bus
)
88 device_unregister(&codec
->ac97
->dev
);
92 /* stop no dev release warning */
93 static void soc_ac97_device_release(struct device
*dev
){}
95 /* register ac97 codec to bus */
96 static int soc_ac97_dev_register(struct snd_soc_codec
*codec
)
100 codec
->ac97
->dev
.bus
= &ac97_bus_type
;
101 codec
->ac97
->dev
.parent
= NULL
;
102 codec
->ac97
->dev
.release
= soc_ac97_device_release
;
104 dev_set_name(&codec
->ac97
->dev
, "%d-%d:%s",
105 codec
->card
->number
, 0, codec
->name
);
106 err
= device_register(&codec
->ac97
->dev
);
108 snd_printk(KERN_ERR
"Can't register ac97 bus\n");
109 codec
->ac97
->dev
.bus
= NULL
;
117 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
118 * then initialized and any private data can be allocated. This also calls
119 * startup for the cpu DAI, platform, machine and codec DAI.
121 static int soc_pcm_open(struct snd_pcm_substream
*substream
)
123 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
124 struct snd_soc_device
*socdev
= rtd
->socdev
;
125 struct snd_soc_card
*card
= socdev
->card
;
126 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
127 struct snd_soc_dai_link
*machine
= rtd
->dai
;
128 struct snd_soc_platform
*platform
= card
->platform
;
129 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
130 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
133 mutex_lock(&pcm_mutex
);
135 /* startup the audio subsystem */
136 if (cpu_dai
->ops
.startup
) {
137 ret
= cpu_dai
->ops
.startup(substream
, cpu_dai
);
139 printk(KERN_ERR
"asoc: can't open interface %s\n",
145 if (platform
->pcm_ops
->open
) {
146 ret
= platform
->pcm_ops
->open(substream
);
148 printk(KERN_ERR
"asoc: can't open platform %s\n", platform
->name
);
153 if (codec_dai
->ops
.startup
) {
154 ret
= codec_dai
->ops
.startup(substream
, codec_dai
);
156 printk(KERN_ERR
"asoc: can't open codec %s\n",
162 if (machine
->ops
&& machine
->ops
->startup
) {
163 ret
= machine
->ops
->startup(substream
);
165 printk(KERN_ERR
"asoc: %s startup failed\n", machine
->name
);
170 /* Check that the codec and cpu DAI's are compatible */
171 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
172 runtime
->hw
.rate_min
=
173 max(codec_dai
->playback
.rate_min
,
174 cpu_dai
->playback
.rate_min
);
175 runtime
->hw
.rate_max
=
176 min(codec_dai
->playback
.rate_max
,
177 cpu_dai
->playback
.rate_max
);
178 runtime
->hw
.channels_min
=
179 max(codec_dai
->playback
.channels_min
,
180 cpu_dai
->playback
.channels_min
);
181 runtime
->hw
.channels_max
=
182 min(codec_dai
->playback
.channels_max
,
183 cpu_dai
->playback
.channels_max
);
184 runtime
->hw
.formats
=
185 codec_dai
->playback
.formats
& cpu_dai
->playback
.formats
;
187 codec_dai
->playback
.rates
& cpu_dai
->playback
.rates
;
189 runtime
->hw
.rate_min
=
190 max(codec_dai
->capture
.rate_min
,
191 cpu_dai
->capture
.rate_min
);
192 runtime
->hw
.rate_max
=
193 min(codec_dai
->capture
.rate_max
,
194 cpu_dai
->capture
.rate_max
);
195 runtime
->hw
.channels_min
=
196 max(codec_dai
->capture
.channels_min
,
197 cpu_dai
->capture
.channels_min
);
198 runtime
->hw
.channels_max
=
199 min(codec_dai
->capture
.channels_max
,
200 cpu_dai
->capture
.channels_max
);
201 runtime
->hw
.formats
=
202 codec_dai
->capture
.formats
& cpu_dai
->capture
.formats
;
204 codec_dai
->capture
.rates
& cpu_dai
->capture
.rates
;
207 snd_pcm_limit_hw_rates(runtime
);
208 if (!runtime
->hw
.rates
) {
209 printk(KERN_ERR
"asoc: %s <-> %s No matching rates\n",
210 codec_dai
->name
, cpu_dai
->name
);
213 if (!runtime
->hw
.formats
) {
214 printk(KERN_ERR
"asoc: %s <-> %s No matching formats\n",
215 codec_dai
->name
, cpu_dai
->name
);
218 if (!runtime
->hw
.channels_min
|| !runtime
->hw
.channels_max
) {
219 printk(KERN_ERR
"asoc: %s <-> %s No matching channels\n",
220 codec_dai
->name
, cpu_dai
->name
);
224 pr_debug("asoc: %s <-> %s info:\n", codec_dai
->name
, cpu_dai
->name
);
225 pr_debug("asoc: rate mask 0x%x\n", runtime
->hw
.rates
);
226 pr_debug("asoc: min ch %d max ch %d\n", runtime
->hw
.channels_min
,
227 runtime
->hw
.channels_max
);
228 pr_debug("asoc: min rate %d max rate %d\n", runtime
->hw
.rate_min
,
229 runtime
->hw
.rate_max
);
231 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
232 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 1;
234 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 1;
235 cpu_dai
->active
= codec_dai
->active
= 1;
236 cpu_dai
->runtime
= runtime
;
237 socdev
->codec
->active
++;
238 mutex_unlock(&pcm_mutex
);
242 if (machine
->ops
&& machine
->ops
->shutdown
)
243 machine
->ops
->shutdown(substream
);
246 if (platform
->pcm_ops
->close
)
247 platform
->pcm_ops
->close(substream
);
250 if (cpu_dai
->ops
.shutdown
)
251 cpu_dai
->ops
.shutdown(substream
, cpu_dai
);
253 mutex_unlock(&pcm_mutex
);
258 * Power down the audio subsystem pmdown_time msecs after close is called.
259 * This is to ensure there are no pops or clicks in between any music tracks
260 * due to DAPM power cycling.
262 static void close_delayed_work(struct work_struct
*work
)
264 struct snd_soc_card
*card
= container_of(work
, struct snd_soc_card
,
266 struct snd_soc_device
*socdev
= card
->socdev
;
267 struct snd_soc_codec
*codec
= socdev
->codec
;
268 struct snd_soc_dai
*codec_dai
;
271 mutex_lock(&pcm_mutex
);
272 for (i
= 0; i
< codec
->num_dai
; i
++) {
273 codec_dai
= &codec
->dai
[i
];
275 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
276 codec_dai
->playback
.stream_name
,
277 codec_dai
->playback
.active
? "active" : "inactive",
278 codec_dai
->pop_wait
? "yes" : "no");
280 /* are we waiting on this codec DAI stream */
281 if (codec_dai
->pop_wait
== 1) {
283 /* Reduce power if no longer active */
284 if (codec
->active
== 0) {
285 pr_debug("pop wq D1 %s %s\n", codec
->name
,
286 codec_dai
->playback
.stream_name
);
287 snd_soc_dapm_set_bias_level(socdev
,
288 SND_SOC_BIAS_PREPARE
);
291 codec_dai
->pop_wait
= 0;
292 snd_soc_dapm_stream_event(codec
,
293 codec_dai
->playback
.stream_name
,
294 SND_SOC_DAPM_STREAM_STOP
);
296 /* Fall into standby if no longer active */
297 if (codec
->active
== 0) {
298 pr_debug("pop wq D3 %s %s\n", codec
->name
,
299 codec_dai
->playback
.stream_name
);
300 snd_soc_dapm_set_bias_level(socdev
,
301 SND_SOC_BIAS_STANDBY
);
305 mutex_unlock(&pcm_mutex
);
309 * Called by ALSA when a PCM substream is closed. Private data can be
310 * freed here. The cpu DAI, codec DAI, machine and platform are also
313 static int soc_codec_close(struct snd_pcm_substream
*substream
)
315 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
316 struct snd_soc_device
*socdev
= rtd
->socdev
;
317 struct snd_soc_card
*card
= socdev
->card
;
318 struct snd_soc_dai_link
*machine
= rtd
->dai
;
319 struct snd_soc_platform
*platform
= card
->platform
;
320 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
321 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
322 struct snd_soc_codec
*codec
= socdev
->codec
;
324 mutex_lock(&pcm_mutex
);
326 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
327 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 0;
329 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 0;
331 if (codec_dai
->playback
.active
== 0 &&
332 codec_dai
->capture
.active
== 0) {
333 cpu_dai
->active
= codec_dai
->active
= 0;
337 /* Muting the DAC suppresses artifacts caused during digital
338 * shutdown, for example from stopping clocks.
340 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
341 snd_soc_dai_digital_mute(codec_dai
, 1);
343 if (cpu_dai
->ops
.shutdown
)
344 cpu_dai
->ops
.shutdown(substream
, cpu_dai
);
346 if (codec_dai
->ops
.shutdown
)
347 codec_dai
->ops
.shutdown(substream
, codec_dai
);
349 if (machine
->ops
&& machine
->ops
->shutdown
)
350 machine
->ops
->shutdown(substream
);
352 if (platform
->pcm_ops
->close
)
353 platform
->pcm_ops
->close(substream
);
354 cpu_dai
->runtime
= NULL
;
356 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
357 /* start delayed pop wq here for playback streams */
358 codec_dai
->pop_wait
= 1;
359 schedule_delayed_work(&card
->delayed_work
,
360 msecs_to_jiffies(pmdown_time
));
362 /* capture streams can be powered down now */
363 snd_soc_dapm_stream_event(codec
,
364 codec_dai
->capture
.stream_name
,
365 SND_SOC_DAPM_STREAM_STOP
);
367 if (codec
->active
== 0 && codec_dai
->pop_wait
== 0)
368 snd_soc_dapm_set_bias_level(socdev
,
369 SND_SOC_BIAS_STANDBY
);
372 mutex_unlock(&pcm_mutex
);
377 * Called by ALSA when the PCM substream is prepared, can set format, sample
378 * rate, etc. This function is non atomic and can be called multiple times,
379 * it can refer to the runtime info.
381 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
383 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
384 struct snd_soc_device
*socdev
= rtd
->socdev
;
385 struct snd_soc_card
*card
= socdev
->card
;
386 struct snd_soc_dai_link
*machine
= rtd
->dai
;
387 struct snd_soc_platform
*platform
= card
->platform
;
388 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
389 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
390 struct snd_soc_codec
*codec
= socdev
->codec
;
393 mutex_lock(&pcm_mutex
);
395 if (machine
->ops
&& machine
->ops
->prepare
) {
396 ret
= machine
->ops
->prepare(substream
);
398 printk(KERN_ERR
"asoc: machine prepare error\n");
403 if (platform
->pcm_ops
->prepare
) {
404 ret
= platform
->pcm_ops
->prepare(substream
);
406 printk(KERN_ERR
"asoc: platform prepare error\n");
411 if (codec_dai
->ops
.prepare
) {
412 ret
= codec_dai
->ops
.prepare(substream
, codec_dai
);
414 printk(KERN_ERR
"asoc: codec DAI prepare error\n");
419 if (cpu_dai
->ops
.prepare
) {
420 ret
= cpu_dai
->ops
.prepare(substream
, cpu_dai
);
422 printk(KERN_ERR
"asoc: cpu DAI prepare error\n");
427 /* cancel any delayed stream shutdown that is pending */
428 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
429 codec_dai
->pop_wait
) {
430 codec_dai
->pop_wait
= 0;
431 cancel_delayed_work(&card
->delayed_work
);
434 /* do we need to power up codec */
435 if (codec
->bias_level
!= SND_SOC_BIAS_ON
) {
436 snd_soc_dapm_set_bias_level(socdev
,
437 SND_SOC_BIAS_PREPARE
);
439 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
440 snd_soc_dapm_stream_event(codec
,
441 codec_dai
->playback
.stream_name
,
442 SND_SOC_DAPM_STREAM_START
);
444 snd_soc_dapm_stream_event(codec
,
445 codec_dai
->capture
.stream_name
,
446 SND_SOC_DAPM_STREAM_START
);
448 snd_soc_dapm_set_bias_level(socdev
, SND_SOC_BIAS_ON
);
449 snd_soc_dai_digital_mute(codec_dai
, 0);
452 /* codec already powered - power on widgets */
453 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
454 snd_soc_dapm_stream_event(codec
,
455 codec_dai
->playback
.stream_name
,
456 SND_SOC_DAPM_STREAM_START
);
458 snd_soc_dapm_stream_event(codec
,
459 codec_dai
->capture
.stream_name
,
460 SND_SOC_DAPM_STREAM_START
);
462 snd_soc_dai_digital_mute(codec_dai
, 0);
466 mutex_unlock(&pcm_mutex
);
471 * Called by ALSA when the hardware params are set by application. This
472 * function can also be called multiple times and can allocate buffers
473 * (using snd_pcm_lib_* ). It's non-atomic.
475 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
476 struct snd_pcm_hw_params
*params
)
478 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
479 struct snd_soc_device
*socdev
= rtd
->socdev
;
480 struct snd_soc_dai_link
*machine
= rtd
->dai
;
481 struct snd_soc_card
*card
= socdev
->card
;
482 struct snd_soc_platform
*platform
= card
->platform
;
483 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
484 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
487 mutex_lock(&pcm_mutex
);
489 if (machine
->ops
&& machine
->ops
->hw_params
) {
490 ret
= machine
->ops
->hw_params(substream
, params
);
492 printk(KERN_ERR
"asoc: machine hw_params failed\n");
497 if (codec_dai
->ops
.hw_params
) {
498 ret
= codec_dai
->ops
.hw_params(substream
, params
, codec_dai
);
500 printk(KERN_ERR
"asoc: can't set codec %s hw params\n",
506 if (cpu_dai
->ops
.hw_params
) {
507 ret
= cpu_dai
->ops
.hw_params(substream
, params
, cpu_dai
);
509 printk(KERN_ERR
"asoc: interface %s hw params failed\n",
515 if (platform
->pcm_ops
->hw_params
) {
516 ret
= platform
->pcm_ops
->hw_params(substream
, params
);
518 printk(KERN_ERR
"asoc: platform %s hw params failed\n",
525 mutex_unlock(&pcm_mutex
);
529 if (cpu_dai
->ops
.hw_free
)
530 cpu_dai
->ops
.hw_free(substream
, cpu_dai
);
533 if (codec_dai
->ops
.hw_free
)
534 codec_dai
->ops
.hw_free(substream
, codec_dai
);
537 if (machine
->ops
&& machine
->ops
->hw_free
)
538 machine
->ops
->hw_free(substream
);
540 mutex_unlock(&pcm_mutex
);
545 * Free's resources allocated by hw_params, can be called multiple times
547 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
549 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
550 struct snd_soc_device
*socdev
= rtd
->socdev
;
551 struct snd_soc_dai_link
*machine
= rtd
->dai
;
552 struct snd_soc_card
*card
= socdev
->card
;
553 struct snd_soc_platform
*platform
= card
->platform
;
554 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
555 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
556 struct snd_soc_codec
*codec
= socdev
->codec
;
558 mutex_lock(&pcm_mutex
);
560 /* apply codec digital mute */
562 snd_soc_dai_digital_mute(codec_dai
, 1);
564 /* free any machine hw params */
565 if (machine
->ops
&& machine
->ops
->hw_free
)
566 machine
->ops
->hw_free(substream
);
568 /* free any DMA resources */
569 if (platform
->pcm_ops
->hw_free
)
570 platform
->pcm_ops
->hw_free(substream
);
572 /* now free hw params for the DAI's */
573 if (codec_dai
->ops
.hw_free
)
574 codec_dai
->ops
.hw_free(substream
, codec_dai
);
576 if (cpu_dai
->ops
.hw_free
)
577 cpu_dai
->ops
.hw_free(substream
, cpu_dai
);
579 mutex_unlock(&pcm_mutex
);
583 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
585 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
586 struct snd_soc_device
*socdev
= rtd
->socdev
;
587 struct snd_soc_card
*card
= socdev
->card
;
588 struct snd_soc_dai_link
*machine
= rtd
->dai
;
589 struct snd_soc_platform
*platform
= card
->platform
;
590 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
591 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
594 if (codec_dai
->ops
.trigger
) {
595 ret
= codec_dai
->ops
.trigger(substream
, cmd
, codec_dai
);
600 if (platform
->pcm_ops
->trigger
) {
601 ret
= platform
->pcm_ops
->trigger(substream
, cmd
);
606 if (cpu_dai
->ops
.trigger
) {
607 ret
= cpu_dai
->ops
.trigger(substream
, cmd
, cpu_dai
);
614 /* ASoC PCM operations */
615 static struct snd_pcm_ops soc_pcm_ops
= {
616 .open
= soc_pcm_open
,
617 .close
= soc_codec_close
,
618 .hw_params
= soc_pcm_hw_params
,
619 .hw_free
= soc_pcm_hw_free
,
620 .prepare
= soc_pcm_prepare
,
621 .trigger
= soc_pcm_trigger
,
625 /* powers down audio subsystem for suspend */
626 static int soc_suspend(struct platform_device
*pdev
, pm_message_t state
)
628 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
629 struct snd_soc_card
*card
= socdev
->card
;
630 struct snd_soc_platform
*platform
= card
->platform
;
631 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
632 struct snd_soc_codec
*codec
= socdev
->codec
;
635 /* Due to the resume being scheduled into a workqueue we could
636 * suspend before that's finished - wait for it to complete.
638 snd_power_lock(codec
->card
);
639 snd_power_wait(codec
->card
, SNDRV_CTL_POWER_D0
);
640 snd_power_unlock(codec
->card
);
642 /* we're going to block userspace touching us until resume completes */
643 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D3hot
);
645 /* mute any active DAC's */
646 for (i
= 0; i
< card
->num_links
; i
++) {
647 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
648 if (dai
->ops
.digital_mute
&& dai
->playback
.active
)
649 dai
->ops
.digital_mute(dai
, 1);
652 /* suspend all pcms */
653 for (i
= 0; i
< card
->num_links
; i
++)
654 snd_pcm_suspend_all(card
->dai_link
[i
].pcm
);
656 if (card
->suspend_pre
)
657 card
->suspend_pre(pdev
, state
);
659 for (i
= 0; i
< card
->num_links
; i
++) {
660 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
661 if (cpu_dai
->suspend
&& !cpu_dai
->ac97_control
)
662 cpu_dai
->suspend(cpu_dai
);
663 if (platform
->suspend
)
664 platform
->suspend(cpu_dai
);
667 /* close any waiting streams and save state */
668 run_delayed_work(&card
->delayed_work
);
669 codec
->suspend_bias_level
= codec
->bias_level
;
671 for (i
= 0; i
< codec
->num_dai
; i
++) {
672 char *stream
= codec
->dai
[i
].playback
.stream_name
;
674 snd_soc_dapm_stream_event(codec
, stream
,
675 SND_SOC_DAPM_STREAM_SUSPEND
);
676 stream
= codec
->dai
[i
].capture
.stream_name
;
678 snd_soc_dapm_stream_event(codec
, stream
,
679 SND_SOC_DAPM_STREAM_SUSPEND
);
682 if (codec_dev
->suspend
)
683 codec_dev
->suspend(pdev
, state
);
685 for (i
= 0; i
< card
->num_links
; i
++) {
686 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
687 if (cpu_dai
->suspend
&& cpu_dai
->ac97_control
)
688 cpu_dai
->suspend(cpu_dai
);
691 if (card
->suspend_post
)
692 card
->suspend_post(pdev
, state
);
697 /* deferred resume work, so resume can complete before we finished
698 * setting our codec back up, which can be very slow on I2C
700 static void soc_resume_deferred(struct work_struct
*work
)
702 struct snd_soc_card
*card
= container_of(work
,
704 deferred_resume_work
);
705 struct snd_soc_device
*socdev
= card
->socdev
;
706 struct snd_soc_platform
*platform
= card
->platform
;
707 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
708 struct snd_soc_codec
*codec
= socdev
->codec
;
709 struct platform_device
*pdev
= to_platform_device(socdev
->dev
);
712 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
713 * so userspace apps are blocked from touching us
716 dev_dbg(socdev
->dev
, "starting resume work\n");
718 if (card
->resume_pre
)
719 card
->resume_pre(pdev
);
721 for (i
= 0; i
< card
->num_links
; i
++) {
722 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
723 if (cpu_dai
->resume
&& cpu_dai
->ac97_control
)
724 cpu_dai
->resume(cpu_dai
);
727 if (codec_dev
->resume
)
728 codec_dev
->resume(pdev
);
730 for (i
= 0; i
< codec
->num_dai
; i
++) {
731 char *stream
= codec
->dai
[i
].playback
.stream_name
;
733 snd_soc_dapm_stream_event(codec
, stream
,
734 SND_SOC_DAPM_STREAM_RESUME
);
735 stream
= codec
->dai
[i
].capture
.stream_name
;
737 snd_soc_dapm_stream_event(codec
, stream
,
738 SND_SOC_DAPM_STREAM_RESUME
);
741 /* unmute any active DACs */
742 for (i
= 0; i
< card
->num_links
; i
++) {
743 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
744 if (dai
->ops
.digital_mute
&& dai
->playback
.active
)
745 dai
->ops
.digital_mute(dai
, 0);
748 for (i
= 0; i
< card
->num_links
; i
++) {
749 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
750 if (cpu_dai
->resume
&& !cpu_dai
->ac97_control
)
751 cpu_dai
->resume(cpu_dai
);
752 if (platform
->resume
)
753 platform
->resume(cpu_dai
);
756 if (card
->resume_post
)
757 card
->resume_post(pdev
);
759 dev_dbg(socdev
->dev
, "resume work completed\n");
761 /* userspace can access us now we are back as we were before */
762 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D0
);
765 /* powers up audio subsystem after a suspend */
766 static int soc_resume(struct platform_device
*pdev
)
768 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
769 struct snd_soc_card
*card
= socdev
->card
;
771 dev_dbg(socdev
->dev
, "scheduling resume work\n");
773 if (!schedule_work(&card
->deferred_resume_work
))
774 dev_err(socdev
->dev
, "resume work item may be lost\n");
780 #define soc_suspend NULL
781 #define soc_resume NULL
784 static void snd_soc_instantiate_card(struct snd_soc_card
*card
)
786 struct platform_device
*pdev
= container_of(card
->dev
,
787 struct platform_device
,
789 struct snd_soc_codec_device
*codec_dev
= card
->socdev
->codec_dev
;
790 struct snd_soc_platform
*platform
;
791 struct snd_soc_dai
*dai
;
792 int i
, found
, ret
, ac97
;
794 if (card
->instantiated
)
798 list_for_each_entry(platform
, &platform_list
, list
)
799 if (card
->platform
== platform
) {
804 dev_dbg(card
->dev
, "Platform %s not registered\n",
805 card
->platform
->name
);
810 for (i
= 0; i
< card
->num_links
; i
++) {
812 list_for_each_entry(dai
, &dai_list
, list
)
813 if (card
->dai_link
[i
].cpu_dai
== dai
) {
818 dev_dbg(card
->dev
, "DAI %s not registered\n",
819 card
->dai_link
[i
].cpu_dai
->name
);
823 if (card
->dai_link
[i
].cpu_dai
->ac97_control
)
827 /* If we have AC97 in the system then don't wait for the
828 * codec. This will need revisiting if we have to handle
829 * systems with mixed AC97 and non-AC97 parts. Only check for
830 * DAIs currently; we can't do this per link since some AC97
831 * codecs have non-AC97 DAIs.
834 for (i
= 0; i
< card
->num_links
; i
++) {
836 list_for_each_entry(dai
, &dai_list
, list
)
837 if (card
->dai_link
[i
].codec_dai
== dai
) {
842 dev_dbg(card
->dev
, "DAI %s not registered\n",
843 card
->dai_link
[i
].codec_dai
->name
);
848 /* Note that we do not current check for codec components */
850 dev_dbg(card
->dev
, "All components present, instantiating\n");
852 /* Found everything, bring it up */
854 ret
= card
->probe(pdev
);
859 for (i
= 0; i
< card
->num_links
; i
++) {
860 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
861 if (cpu_dai
->probe
) {
862 ret
= cpu_dai
->probe(pdev
, cpu_dai
);
868 if (codec_dev
->probe
) {
869 ret
= codec_dev
->probe(pdev
);
874 if (platform
->probe
) {
875 ret
= platform
->probe(pdev
);
880 /* DAPM stream work */
881 INIT_DELAYED_WORK(&card
->delayed_work
, close_delayed_work
);
883 /* deferred resume work */
884 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
887 card
->instantiated
= 1;
892 if (codec_dev
->remove
)
893 codec_dev
->remove(pdev
);
896 for (i
--; i
>= 0; i
--) {
897 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
899 cpu_dai
->remove(pdev
, cpu_dai
);
907 * Attempt to initialise any uninitalised cards. Must be called with
910 static void snd_soc_instantiate_cards(void)
912 struct snd_soc_card
*card
;
913 list_for_each_entry(card
, &card_list
, list
)
914 snd_soc_instantiate_card(card
);
917 /* probes a new socdev */
918 static int soc_probe(struct platform_device
*pdev
)
921 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
922 struct snd_soc_card
*card
= socdev
->card
;
924 /* Bodge while we push things out of socdev */
925 card
->socdev
= socdev
;
927 /* Bodge while we unpick instantiation */
928 card
->dev
= &pdev
->dev
;
929 ret
= snd_soc_register_card(card
);
931 dev_err(&pdev
->dev
, "Failed to register card\n");
938 /* removes a socdev */
939 static int soc_remove(struct platform_device
*pdev
)
942 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
943 struct snd_soc_card
*card
= socdev
->card
;
944 struct snd_soc_platform
*platform
= card
->platform
;
945 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
947 run_delayed_work(&card
->delayed_work
);
949 if (platform
->remove
)
950 platform
->remove(pdev
);
952 if (codec_dev
->remove
)
953 codec_dev
->remove(pdev
);
955 for (i
= 0; i
< card
->num_links
; i
++) {
956 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
958 cpu_dai
->remove(pdev
, cpu_dai
);
964 snd_soc_unregister_card(card
);
969 /* ASoC platform driver */
970 static struct platform_driver soc_driver
= {
973 .owner
= THIS_MODULE
,
976 .remove
= soc_remove
,
977 .suspend
= soc_suspend
,
978 .resume
= soc_resume
,
981 /* create a new pcm */
982 static int soc_new_pcm(struct snd_soc_device
*socdev
,
983 struct snd_soc_dai_link
*dai_link
, int num
)
985 struct snd_soc_codec
*codec
= socdev
->codec
;
986 struct snd_soc_card
*card
= socdev
->card
;
987 struct snd_soc_platform
*platform
= card
->platform
;
988 struct snd_soc_dai
*codec_dai
= dai_link
->codec_dai
;
989 struct snd_soc_dai
*cpu_dai
= dai_link
->cpu_dai
;
990 struct snd_soc_pcm_runtime
*rtd
;
993 int ret
= 0, playback
= 0, capture
= 0;
995 rtd
= kzalloc(sizeof(struct snd_soc_pcm_runtime
), GFP_KERNEL
);
1000 rtd
->socdev
= socdev
;
1001 codec_dai
->codec
= socdev
->codec
;
1003 /* check client and interface hw capabilities */
1004 sprintf(new_name
, "%s %s-%d", dai_link
->stream_name
, codec_dai
->name
,
1007 if (codec_dai
->playback
.channels_min
)
1009 if (codec_dai
->capture
.channels_min
)
1012 ret
= snd_pcm_new(codec
->card
, new_name
, codec
->pcm_devs
++, playback
,
1015 printk(KERN_ERR
"asoc: can't create pcm for codec %s\n",
1021 dai_link
->pcm
= pcm
;
1022 pcm
->private_data
= rtd
;
1023 soc_pcm_ops
.mmap
= platform
->pcm_ops
->mmap
;
1024 soc_pcm_ops
.pointer
= platform
->pcm_ops
->pointer
;
1025 soc_pcm_ops
.ioctl
= platform
->pcm_ops
->ioctl
;
1026 soc_pcm_ops
.copy
= platform
->pcm_ops
->copy
;
1027 soc_pcm_ops
.silence
= platform
->pcm_ops
->silence
;
1028 soc_pcm_ops
.ack
= platform
->pcm_ops
->ack
;
1029 soc_pcm_ops
.page
= platform
->pcm_ops
->page
;
1032 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &soc_pcm_ops
);
1035 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &soc_pcm_ops
);
1037 ret
= platform
->pcm_new(codec
->card
, codec_dai
, pcm
);
1039 printk(KERN_ERR
"asoc: platform pcm constructor failed\n");
1044 pcm
->private_free
= platform
->pcm_free
;
1045 printk(KERN_INFO
"asoc: %s <-> %s mapping ok\n", codec_dai
->name
,
1050 /* codec register dump */
1051 static ssize_t
soc_codec_reg_show(struct snd_soc_device
*devdata
, char *buf
)
1053 struct snd_soc_codec
*codec
= devdata
->codec
;
1054 int i
, step
= 1, count
= 0;
1056 if (!codec
->reg_cache_size
)
1059 if (codec
->reg_cache_step
)
1060 step
= codec
->reg_cache_step
;
1062 count
+= sprintf(buf
, "%s registers\n", codec
->name
);
1063 for (i
= 0; i
< codec
->reg_cache_size
; i
+= step
) {
1064 count
+= sprintf(buf
+ count
, "%2x: ", i
);
1065 if (count
>= PAGE_SIZE
- 1)
1068 if (codec
->display_register
)
1069 count
+= codec
->display_register(codec
, buf
+ count
,
1070 PAGE_SIZE
- count
, i
);
1072 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
,
1073 "%4x", codec
->read(codec
, i
));
1075 if (count
>= PAGE_SIZE
- 1)
1078 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
, "\n");
1079 if (count
>= PAGE_SIZE
- 1)
1083 /* Truncate count; min() would cause a warning */
1084 if (count
>= PAGE_SIZE
)
1085 count
= PAGE_SIZE
- 1;
1089 static ssize_t
codec_reg_show(struct device
*dev
,
1090 struct device_attribute
*attr
, char *buf
)
1092 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
1093 return soc_codec_reg_show(devdata
, buf
);
1096 static DEVICE_ATTR(codec_reg
, 0444, codec_reg_show
, NULL
);
1098 #ifdef CONFIG_DEBUG_FS
1099 static int codec_reg_open_file(struct inode
*inode
, struct file
*file
)
1101 file
->private_data
= inode
->i_private
;
1105 static ssize_t
codec_reg_read_file(struct file
*file
, char __user
*user_buf
,
1106 size_t count
, loff_t
*ppos
)
1109 struct snd_soc_codec
*codec
= file
->private_data
;
1110 struct device
*card_dev
= codec
->card
->dev
;
1111 struct snd_soc_device
*devdata
= card_dev
->driver_data
;
1112 char *buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1115 ret
= soc_codec_reg_show(devdata
, buf
);
1117 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1122 static ssize_t
codec_reg_write_file(struct file
*file
,
1123 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
1128 unsigned long reg
, value
;
1130 struct snd_soc_codec
*codec
= file
->private_data
;
1132 buf_size
= min(count
, (sizeof(buf
)-1));
1133 if (copy_from_user(buf
, user_buf
, buf_size
))
1137 if (codec
->reg_cache_step
)
1138 step
= codec
->reg_cache_step
;
1140 while (*start
== ' ')
1142 reg
= simple_strtoul(start
, &start
, 16);
1143 if ((reg
>= codec
->reg_cache_size
) || (reg
% step
))
1145 while (*start
== ' ')
1147 if (strict_strtoul(start
, 16, &value
))
1149 codec
->write(codec
, reg
, value
);
1153 static const struct file_operations codec_reg_fops
= {
1154 .open
= codec_reg_open_file
,
1155 .read
= codec_reg_read_file
,
1156 .write
= codec_reg_write_file
,
1159 static void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
1161 codec
->debugfs_reg
= debugfs_create_file("codec_reg", 0644,
1162 debugfs_root
, codec
,
1164 if (!codec
->debugfs_reg
)
1166 "ASoC: Failed to create codec register debugfs file\n");
1168 codec
->debugfs_pop_time
= debugfs_create_u32("dapm_pop_time", 0744,
1171 if (!codec
->debugfs_pop_time
)
1173 "Failed to create pop time debugfs file\n");
1176 static void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
1178 debugfs_remove(codec
->debugfs_pop_time
);
1179 debugfs_remove(codec
->debugfs_reg
);
1184 static inline void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
1188 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
1194 * snd_soc_new_ac97_codec - initailise AC97 device
1195 * @codec: audio codec
1196 * @ops: AC97 bus operations
1197 * @num: AC97 codec number
1199 * Initialises AC97 codec resources for use by ad-hoc devices only.
1201 int snd_soc_new_ac97_codec(struct snd_soc_codec
*codec
,
1202 struct snd_ac97_bus_ops
*ops
, int num
)
1204 mutex_lock(&codec
->mutex
);
1206 codec
->ac97
= kzalloc(sizeof(struct snd_ac97
), GFP_KERNEL
);
1207 if (codec
->ac97
== NULL
) {
1208 mutex_unlock(&codec
->mutex
);
1212 codec
->ac97
->bus
= kzalloc(sizeof(struct snd_ac97_bus
), GFP_KERNEL
);
1213 if (codec
->ac97
->bus
== NULL
) {
1216 mutex_unlock(&codec
->mutex
);
1220 codec
->ac97
->bus
->ops
= ops
;
1221 codec
->ac97
->num
= num
;
1222 mutex_unlock(&codec
->mutex
);
1225 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec
);
1228 * snd_soc_free_ac97_codec - free AC97 codec device
1229 * @codec: audio codec
1231 * Frees AC97 codec device resources.
1233 void snd_soc_free_ac97_codec(struct snd_soc_codec
*codec
)
1235 mutex_lock(&codec
->mutex
);
1236 kfree(codec
->ac97
->bus
);
1239 mutex_unlock(&codec
->mutex
);
1241 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec
);
1244 * snd_soc_update_bits - update codec register bits
1245 * @codec: audio codec
1246 * @reg: codec register
1247 * @mask: register mask
1250 * Writes new register value.
1252 * Returns 1 for change else 0.
1254 int snd_soc_update_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1255 unsigned short mask
, unsigned short value
)
1258 unsigned short old
, new;
1260 mutex_lock(&io_mutex
);
1261 old
= snd_soc_read(codec
, reg
);
1262 new = (old
& ~mask
) | value
;
1263 change
= old
!= new;
1265 snd_soc_write(codec
, reg
, new);
1267 mutex_unlock(&io_mutex
);
1270 EXPORT_SYMBOL_GPL(snd_soc_update_bits
);
1273 * snd_soc_test_bits - test register for change
1274 * @codec: audio codec
1275 * @reg: codec register
1276 * @mask: register mask
1279 * Tests a register with a new value and checks if the new value is
1280 * different from the old value.
1282 * Returns 1 for change else 0.
1284 int snd_soc_test_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1285 unsigned short mask
, unsigned short value
)
1288 unsigned short old
, new;
1290 mutex_lock(&io_mutex
);
1291 old
= snd_soc_read(codec
, reg
);
1292 new = (old
& ~mask
) | value
;
1293 change
= old
!= new;
1294 mutex_unlock(&io_mutex
);
1298 EXPORT_SYMBOL_GPL(snd_soc_test_bits
);
1301 * snd_soc_new_pcms - create new sound card and pcms
1302 * @socdev: the SoC audio device
1304 * Create a new sound card based upon the codec and interface pcms.
1306 * Returns 0 for success, else error.
1308 int snd_soc_new_pcms(struct snd_soc_device
*socdev
, int idx
, const char *xid
)
1310 struct snd_soc_codec
*codec
= socdev
->codec
;
1311 struct snd_soc_card
*card
= socdev
->card
;
1314 mutex_lock(&codec
->mutex
);
1316 /* register a sound card */
1317 codec
->card
= snd_card_new(idx
, xid
, codec
->owner
, 0);
1319 printk(KERN_ERR
"asoc: can't create sound card for codec %s\n",
1321 mutex_unlock(&codec
->mutex
);
1325 codec
->card
->dev
= socdev
->dev
;
1326 codec
->card
->private_data
= codec
;
1327 strncpy(codec
->card
->driver
, codec
->name
, sizeof(codec
->card
->driver
));
1329 /* create the pcms */
1330 for (i
= 0; i
< card
->num_links
; i
++) {
1331 ret
= soc_new_pcm(socdev
, &card
->dai_link
[i
], i
);
1333 printk(KERN_ERR
"asoc: can't create pcm %s\n",
1334 card
->dai_link
[i
].stream_name
);
1335 mutex_unlock(&codec
->mutex
);
1340 mutex_unlock(&codec
->mutex
);
1343 EXPORT_SYMBOL_GPL(snd_soc_new_pcms
);
1346 * snd_soc_init_card - register sound card
1347 * @socdev: the SoC audio device
1349 * Register a SoC sound card. Also registers an AC97 device if the
1350 * codec is AC97 for ad hoc devices.
1352 * Returns 0 for success, else error.
1354 int snd_soc_init_card(struct snd_soc_device
*socdev
)
1356 struct snd_soc_codec
*codec
= socdev
->codec
;
1357 struct snd_soc_card
*card
= socdev
->card
;
1358 int ret
= 0, i
, ac97
= 0, err
= 0;
1360 for (i
= 0; i
< card
->num_links
; i
++) {
1361 if (card
->dai_link
[i
].init
) {
1362 err
= card
->dai_link
[i
].init(codec
);
1364 printk(KERN_ERR
"asoc: failed to init %s\n",
1365 card
->dai_link
[i
].stream_name
);
1369 if (card
->dai_link
[i
].codec_dai
->ac97_control
)
1372 snprintf(codec
->card
->shortname
, sizeof(codec
->card
->shortname
),
1374 snprintf(codec
->card
->longname
, sizeof(codec
->card
->longname
),
1375 "%s (%s)", card
->name
, codec
->name
);
1377 ret
= snd_card_register(codec
->card
);
1379 printk(KERN_ERR
"asoc: failed to register soundcard for %s\n",
1384 mutex_lock(&codec
->mutex
);
1385 #ifdef CONFIG_SND_SOC_AC97_BUS
1387 ret
= soc_ac97_dev_register(codec
);
1389 printk(KERN_ERR
"asoc: AC97 device register failed\n");
1390 snd_card_free(codec
->card
);
1391 mutex_unlock(&codec
->mutex
);
1397 err
= snd_soc_dapm_sys_add(socdev
->dev
);
1399 printk(KERN_WARNING
"asoc: failed to add dapm sysfs entries\n");
1401 err
= device_create_file(socdev
->dev
, &dev_attr_codec_reg
);
1403 printk(KERN_WARNING
"asoc: failed to add codec sysfs files\n");
1405 soc_init_codec_debugfs(socdev
->codec
);
1406 mutex_unlock(&codec
->mutex
);
1411 EXPORT_SYMBOL_GPL(snd_soc_init_card
);
1414 * snd_soc_free_pcms - free sound card and pcms
1415 * @socdev: the SoC audio device
1417 * Frees sound card and pcms associated with the socdev.
1418 * Also unregister the codec if it is an AC97 device.
1420 void snd_soc_free_pcms(struct snd_soc_device
*socdev
)
1422 struct snd_soc_codec
*codec
= socdev
->codec
;
1423 #ifdef CONFIG_SND_SOC_AC97_BUS
1424 struct snd_soc_dai
*codec_dai
;
1428 mutex_lock(&codec
->mutex
);
1429 soc_cleanup_codec_debugfs(socdev
->codec
);
1430 #ifdef CONFIG_SND_SOC_AC97_BUS
1431 for (i
= 0; i
< codec
->num_dai
; i
++) {
1432 codec_dai
= &codec
->dai
[i
];
1433 if (codec_dai
->ac97_control
&& codec
->ac97
) {
1434 soc_ac97_dev_unregister(codec
);
1442 snd_card_free(codec
->card
);
1443 device_remove_file(socdev
->dev
, &dev_attr_codec_reg
);
1444 mutex_unlock(&codec
->mutex
);
1446 EXPORT_SYMBOL_GPL(snd_soc_free_pcms
);
1449 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1450 * @substream: the pcm substream
1451 * @hw: the hardware parameters
1453 * Sets the substream runtime hardware parameters.
1455 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
1456 const struct snd_pcm_hardware
*hw
)
1458 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1459 runtime
->hw
.info
= hw
->info
;
1460 runtime
->hw
.formats
= hw
->formats
;
1461 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
1462 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
1463 runtime
->hw
.periods_min
= hw
->periods_min
;
1464 runtime
->hw
.periods_max
= hw
->periods_max
;
1465 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
1466 runtime
->hw
.fifo_size
= hw
->fifo_size
;
1469 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
1472 * snd_soc_cnew - create new control
1473 * @_template: control template
1474 * @data: control private data
1475 * @lnng_name: control long name
1477 * Create a new mixer control from a template control.
1479 * Returns 0 for success, else error.
1481 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
1482 void *data
, char *long_name
)
1484 struct snd_kcontrol_new
template;
1486 memcpy(&template, _template
, sizeof(template));
1488 template.name
= long_name
;
1491 return snd_ctl_new1(&template, data
);
1493 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
1496 * snd_soc_info_enum_double - enumerated double mixer info callback
1497 * @kcontrol: mixer control
1498 * @uinfo: control element information
1500 * Callback to provide information about a double enumerated
1503 * Returns 0 for success.
1505 int snd_soc_info_enum_double(struct snd_kcontrol
*kcontrol
,
1506 struct snd_ctl_elem_info
*uinfo
)
1508 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1510 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1511 uinfo
->count
= e
->shift_l
== e
->shift_r
? 1 : 2;
1512 uinfo
->value
.enumerated
.items
= e
->max
;
1514 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1515 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1516 strcpy(uinfo
->value
.enumerated
.name
,
1517 e
->texts
[uinfo
->value
.enumerated
.item
]);
1520 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double
);
1523 * snd_soc_get_enum_double - enumerated double mixer get callback
1524 * @kcontrol: mixer control
1525 * @uinfo: control element information
1527 * Callback to get the value of a double enumerated mixer.
1529 * Returns 0 for success.
1531 int snd_soc_get_enum_double(struct snd_kcontrol
*kcontrol
,
1532 struct snd_ctl_elem_value
*ucontrol
)
1534 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1535 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1536 unsigned short val
, bitmask
;
1538 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1540 val
= snd_soc_read(codec
, e
->reg
);
1541 ucontrol
->value
.enumerated
.item
[0]
1542 = (val
>> e
->shift_l
) & (bitmask
- 1);
1543 if (e
->shift_l
!= e
->shift_r
)
1544 ucontrol
->value
.enumerated
.item
[1] =
1545 (val
>> e
->shift_r
) & (bitmask
- 1);
1549 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double
);
1552 * snd_soc_put_enum_double - enumerated double mixer put callback
1553 * @kcontrol: mixer control
1554 * @uinfo: control element information
1556 * Callback to set the value of a double enumerated mixer.
1558 * Returns 0 for success.
1560 int snd_soc_put_enum_double(struct snd_kcontrol
*kcontrol
,
1561 struct snd_ctl_elem_value
*ucontrol
)
1563 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1564 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1566 unsigned short mask
, bitmask
;
1568 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1570 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1572 val
= ucontrol
->value
.enumerated
.item
[0] << e
->shift_l
;
1573 mask
= (bitmask
- 1) << e
->shift_l
;
1574 if (e
->shift_l
!= e
->shift_r
) {
1575 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1577 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1578 mask
|= (bitmask
- 1) << e
->shift_r
;
1581 return snd_soc_update_bits(codec
, e
->reg
, mask
, val
);
1583 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double
);
1586 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1587 * @kcontrol: mixer control
1588 * @uinfo: control element information
1590 * Callback to provide information about an external enumerated
1593 * Returns 0 for success.
1595 int snd_soc_info_enum_ext(struct snd_kcontrol
*kcontrol
,
1596 struct snd_ctl_elem_info
*uinfo
)
1598 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1600 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1602 uinfo
->value
.enumerated
.items
= e
->max
;
1604 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1605 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1606 strcpy(uinfo
->value
.enumerated
.name
,
1607 e
->texts
[uinfo
->value
.enumerated
.item
]);
1610 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext
);
1613 * snd_soc_info_volsw_ext - external single mixer info callback
1614 * @kcontrol: mixer control
1615 * @uinfo: control element information
1617 * Callback to provide information about a single external mixer control.
1619 * Returns 0 for success.
1621 int snd_soc_info_volsw_ext(struct snd_kcontrol
*kcontrol
,
1622 struct snd_ctl_elem_info
*uinfo
)
1624 int max
= kcontrol
->private_value
;
1627 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1629 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1632 uinfo
->value
.integer
.min
= 0;
1633 uinfo
->value
.integer
.max
= max
;
1636 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext
);
1639 * snd_soc_info_volsw - single mixer info callback
1640 * @kcontrol: mixer control
1641 * @uinfo: control element information
1643 * Callback to provide information about a single mixer control.
1645 * Returns 0 for success.
1647 int snd_soc_info_volsw(struct snd_kcontrol
*kcontrol
,
1648 struct snd_ctl_elem_info
*uinfo
)
1650 struct soc_mixer_control
*mc
=
1651 (struct soc_mixer_control
*)kcontrol
->private_value
;
1653 unsigned int shift
= mc
->shift
;
1654 unsigned int rshift
= mc
->rshift
;
1657 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1659 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1661 uinfo
->count
= shift
== rshift
? 1 : 2;
1662 uinfo
->value
.integer
.min
= 0;
1663 uinfo
->value
.integer
.max
= max
;
1666 EXPORT_SYMBOL_GPL(snd_soc_info_volsw
);
1669 * snd_soc_get_volsw - single mixer get callback
1670 * @kcontrol: mixer control
1671 * @uinfo: control element information
1673 * Callback to get the value of a single mixer control.
1675 * Returns 0 for success.
1677 int snd_soc_get_volsw(struct snd_kcontrol
*kcontrol
,
1678 struct snd_ctl_elem_value
*ucontrol
)
1680 struct soc_mixer_control
*mc
=
1681 (struct soc_mixer_control
*)kcontrol
->private_value
;
1682 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1683 unsigned int reg
= mc
->reg
;
1684 unsigned int shift
= mc
->shift
;
1685 unsigned int rshift
= mc
->rshift
;
1687 unsigned int mask
= (1 << fls(max
)) - 1;
1688 unsigned int invert
= mc
->invert
;
1690 ucontrol
->value
.integer
.value
[0] =
1691 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1692 if (shift
!= rshift
)
1693 ucontrol
->value
.integer
.value
[1] =
1694 (snd_soc_read(codec
, reg
) >> rshift
) & mask
;
1696 ucontrol
->value
.integer
.value
[0] =
1697 max
- ucontrol
->value
.integer
.value
[0];
1698 if (shift
!= rshift
)
1699 ucontrol
->value
.integer
.value
[1] =
1700 max
- ucontrol
->value
.integer
.value
[1];
1705 EXPORT_SYMBOL_GPL(snd_soc_get_volsw
);
1708 * snd_soc_put_volsw - single mixer put callback
1709 * @kcontrol: mixer control
1710 * @uinfo: control element information
1712 * Callback to set the value of a single mixer control.
1714 * Returns 0 for success.
1716 int snd_soc_put_volsw(struct snd_kcontrol
*kcontrol
,
1717 struct snd_ctl_elem_value
*ucontrol
)
1719 struct soc_mixer_control
*mc
=
1720 (struct soc_mixer_control
*)kcontrol
->private_value
;
1721 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1722 unsigned int reg
= mc
->reg
;
1723 unsigned int shift
= mc
->shift
;
1724 unsigned int rshift
= mc
->rshift
;
1726 unsigned int mask
= (1 << fls(max
)) - 1;
1727 unsigned int invert
= mc
->invert
;
1728 unsigned short val
, val2
, val_mask
;
1730 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1733 val_mask
= mask
<< shift
;
1735 if (shift
!= rshift
) {
1736 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1739 val_mask
|= mask
<< rshift
;
1740 val
|= val2
<< rshift
;
1742 return snd_soc_update_bits(codec
, reg
, val_mask
, val
);
1744 EXPORT_SYMBOL_GPL(snd_soc_put_volsw
);
1747 * snd_soc_info_volsw_2r - double mixer info callback
1748 * @kcontrol: mixer control
1749 * @uinfo: control element information
1751 * Callback to provide information about a double mixer control that
1752 * spans 2 codec registers.
1754 * Returns 0 for success.
1756 int snd_soc_info_volsw_2r(struct snd_kcontrol
*kcontrol
,
1757 struct snd_ctl_elem_info
*uinfo
)
1759 struct soc_mixer_control
*mc
=
1760 (struct soc_mixer_control
*)kcontrol
->private_value
;
1764 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1766 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1769 uinfo
->value
.integer
.min
= 0;
1770 uinfo
->value
.integer
.max
= max
;
1773 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r
);
1776 * snd_soc_get_volsw_2r - double mixer get callback
1777 * @kcontrol: mixer control
1778 * @uinfo: control element information
1780 * Callback to get the value of a double mixer control that spans 2 registers.
1782 * Returns 0 for success.
1784 int snd_soc_get_volsw_2r(struct snd_kcontrol
*kcontrol
,
1785 struct snd_ctl_elem_value
*ucontrol
)
1787 struct soc_mixer_control
*mc
=
1788 (struct soc_mixer_control
*)kcontrol
->private_value
;
1789 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1790 unsigned int reg
= mc
->reg
;
1791 unsigned int reg2
= mc
->rreg
;
1792 unsigned int shift
= mc
->shift
;
1794 unsigned int mask
= (1<<fls(max
))-1;
1795 unsigned int invert
= mc
->invert
;
1797 ucontrol
->value
.integer
.value
[0] =
1798 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1799 ucontrol
->value
.integer
.value
[1] =
1800 (snd_soc_read(codec
, reg2
) >> shift
) & mask
;
1802 ucontrol
->value
.integer
.value
[0] =
1803 max
- ucontrol
->value
.integer
.value
[0];
1804 ucontrol
->value
.integer
.value
[1] =
1805 max
- ucontrol
->value
.integer
.value
[1];
1810 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r
);
1813 * snd_soc_put_volsw_2r - double mixer set callback
1814 * @kcontrol: mixer control
1815 * @uinfo: control element information
1817 * Callback to set the value of a double mixer control that spans 2 registers.
1819 * Returns 0 for success.
1821 int snd_soc_put_volsw_2r(struct snd_kcontrol
*kcontrol
,
1822 struct snd_ctl_elem_value
*ucontrol
)
1824 struct soc_mixer_control
*mc
=
1825 (struct soc_mixer_control
*)kcontrol
->private_value
;
1826 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1827 unsigned int reg
= mc
->reg
;
1828 unsigned int reg2
= mc
->rreg
;
1829 unsigned int shift
= mc
->shift
;
1831 unsigned int mask
= (1 << fls(max
)) - 1;
1832 unsigned int invert
= mc
->invert
;
1834 unsigned short val
, val2
, val_mask
;
1836 val_mask
= mask
<< shift
;
1837 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1838 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1846 val2
= val2
<< shift
;
1848 err
= snd_soc_update_bits(codec
, reg
, val_mask
, val
);
1852 err
= snd_soc_update_bits(codec
, reg2
, val_mask
, val2
);
1855 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r
);
1858 * snd_soc_info_volsw_s8 - signed mixer info callback
1859 * @kcontrol: mixer control
1860 * @uinfo: control element information
1862 * Callback to provide information about a signed mixer control.
1864 * Returns 0 for success.
1866 int snd_soc_info_volsw_s8(struct snd_kcontrol
*kcontrol
,
1867 struct snd_ctl_elem_info
*uinfo
)
1869 struct soc_mixer_control
*mc
=
1870 (struct soc_mixer_control
*)kcontrol
->private_value
;
1874 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1876 uinfo
->value
.integer
.min
= 0;
1877 uinfo
->value
.integer
.max
= max
-min
;
1880 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8
);
1883 * snd_soc_get_volsw_s8 - signed mixer get callback
1884 * @kcontrol: mixer control
1885 * @uinfo: control element information
1887 * Callback to get the value of a signed mixer control.
1889 * Returns 0 for success.
1891 int snd_soc_get_volsw_s8(struct snd_kcontrol
*kcontrol
,
1892 struct snd_ctl_elem_value
*ucontrol
)
1894 struct soc_mixer_control
*mc
=
1895 (struct soc_mixer_control
*)kcontrol
->private_value
;
1896 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1897 unsigned int reg
= mc
->reg
;
1899 int val
= snd_soc_read(codec
, reg
);
1901 ucontrol
->value
.integer
.value
[0] =
1902 ((signed char)(val
& 0xff))-min
;
1903 ucontrol
->value
.integer
.value
[1] =
1904 ((signed char)((val
>> 8) & 0xff))-min
;
1907 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8
);
1910 * snd_soc_put_volsw_sgn - signed mixer put callback
1911 * @kcontrol: mixer control
1912 * @uinfo: control element information
1914 * Callback to set the value of a signed mixer control.
1916 * Returns 0 for success.
1918 int snd_soc_put_volsw_s8(struct snd_kcontrol
*kcontrol
,
1919 struct snd_ctl_elem_value
*ucontrol
)
1921 struct soc_mixer_control
*mc
=
1922 (struct soc_mixer_control
*)kcontrol
->private_value
;
1923 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1924 unsigned int reg
= mc
->reg
;
1928 val
= (ucontrol
->value
.integer
.value
[0]+min
) & 0xff;
1929 val
|= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff) << 8;
1931 return snd_soc_update_bits(codec
, reg
, 0xffff, val
);
1933 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8
);
1936 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1938 * @clk_id: DAI specific clock ID
1939 * @freq: new clock frequency in Hz
1940 * @dir: new clock direction - input/output.
1942 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1944 int snd_soc_dai_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
1945 unsigned int freq
, int dir
)
1947 if (dai
->ops
.set_sysclk
)
1948 return dai
->ops
.set_sysclk(dai
, clk_id
, freq
, dir
);
1952 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk
);
1955 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
1957 * @clk_id: DAI specific clock divider ID
1958 * @div: new clock divisor.
1960 * Configures the clock dividers. This is used to derive the best DAI bit and
1961 * frame clocks from the system or master clock. It's best to set the DAI bit
1962 * and frame clocks as low as possible to save system power.
1964 int snd_soc_dai_set_clkdiv(struct snd_soc_dai
*dai
,
1965 int div_id
, int div
)
1967 if (dai
->ops
.set_clkdiv
)
1968 return dai
->ops
.set_clkdiv(dai
, div_id
, div
);
1972 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv
);
1975 * snd_soc_dai_set_pll - configure DAI PLL.
1977 * @pll_id: DAI specific PLL ID
1978 * @freq_in: PLL input clock frequency in Hz
1979 * @freq_out: requested PLL output clock frequency in Hz
1981 * Configures and enables PLL to generate output clock based on input clock.
1983 int snd_soc_dai_set_pll(struct snd_soc_dai
*dai
,
1984 int pll_id
, unsigned int freq_in
, unsigned int freq_out
)
1986 if (dai
->ops
.set_pll
)
1987 return dai
->ops
.set_pll(dai
, pll_id
, freq_in
, freq_out
);
1991 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll
);
1994 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
1996 * @fmt: SND_SOC_DAIFMT_ format value.
1998 * Configures the DAI hardware format and clocking.
2000 int snd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
2002 if (dai
->ops
.set_fmt
)
2003 return dai
->ops
.set_fmt(dai
, fmt
);
2007 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt
);
2010 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2012 * @mask: DAI specific mask representing used slots.
2013 * @slots: Number of slots in use.
2015 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2018 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai
*dai
,
2019 unsigned int mask
, int slots
)
2021 if (dai
->ops
.set_sysclk
)
2022 return dai
->ops
.set_tdm_slot(dai
, mask
, slots
);
2026 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot
);
2029 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2031 * @tristate: tristate enable
2033 * Tristates the DAI so that others can use it.
2035 int snd_soc_dai_set_tristate(struct snd_soc_dai
*dai
, int tristate
)
2037 if (dai
->ops
.set_sysclk
)
2038 return dai
->ops
.set_tristate(dai
, tristate
);
2042 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate
);
2045 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2047 * @mute: mute enable
2049 * Mutes the DAI DAC.
2051 int snd_soc_dai_digital_mute(struct snd_soc_dai
*dai
, int mute
)
2053 if (dai
->ops
.digital_mute
)
2054 return dai
->ops
.digital_mute(dai
, mute
);
2058 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute
);
2061 * snd_soc_register_card - Register a card with the ASoC core
2063 * @param card Card to register
2065 * Note that currently this is an internal only function: it will be
2066 * exposed to machine drivers after further backporting of ASoC v2
2067 * registration APIs.
2069 static int snd_soc_register_card(struct snd_soc_card
*card
)
2071 if (!card
->name
|| !card
->dev
)
2074 INIT_LIST_HEAD(&card
->list
);
2075 card
->instantiated
= 0;
2077 mutex_lock(&client_mutex
);
2078 list_add(&card
->list
, &card_list
);
2079 snd_soc_instantiate_cards();
2080 mutex_unlock(&client_mutex
);
2082 dev_dbg(card
->dev
, "Registered card '%s'\n", card
->name
);
2088 * snd_soc_unregister_card - Unregister a card with the ASoC core
2090 * @param card Card to unregister
2092 * Note that currently this is an internal only function: it will be
2093 * exposed to machine drivers after further backporting of ASoC v2
2094 * registration APIs.
2096 static int snd_soc_unregister_card(struct snd_soc_card
*card
)
2098 mutex_lock(&client_mutex
);
2099 list_del(&card
->list
);
2100 mutex_unlock(&client_mutex
);
2102 dev_dbg(card
->dev
, "Unregistered card '%s'\n", card
->name
);
2108 * snd_soc_register_dai - Register a DAI with the ASoC core
2110 * @param dai DAI to register
2112 int snd_soc_register_dai(struct snd_soc_dai
*dai
)
2117 /* The device should become mandatory over time */
2119 printk(KERN_WARNING
"No device for DAI %s\n", dai
->name
);
2121 INIT_LIST_HEAD(&dai
->list
);
2123 mutex_lock(&client_mutex
);
2124 list_add(&dai
->list
, &dai_list
);
2125 snd_soc_instantiate_cards();
2126 mutex_unlock(&client_mutex
);
2128 pr_debug("Registered DAI '%s'\n", dai
->name
);
2132 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2135 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2137 * @param dai DAI to unregister
2139 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2141 mutex_lock(&client_mutex
);
2142 list_del(&dai
->list
);
2143 mutex_unlock(&client_mutex
);
2145 pr_debug("Unregistered DAI '%s'\n", dai
->name
);
2147 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2150 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2152 * @param dai Array of DAIs to register
2153 * @param count Number of DAIs
2155 int snd_soc_register_dais(struct snd_soc_dai
*dai
, size_t count
)
2159 for (i
= 0; i
< count
; i
++) {
2160 ret
= snd_soc_register_dai(&dai
[i
]);
2168 for (i
--; i
>= 0; i
--)
2169 snd_soc_unregister_dai(&dai
[i
]);
2173 EXPORT_SYMBOL_GPL(snd_soc_register_dais
);
2176 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2178 * @param dai Array of DAIs to unregister
2179 * @param count Number of DAIs
2181 void snd_soc_unregister_dais(struct snd_soc_dai
*dai
, size_t count
)
2185 for (i
= 0; i
< count
; i
++)
2186 snd_soc_unregister_dai(&dai
[i
]);
2188 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais
);
2191 * snd_soc_register_platform - Register a platform with the ASoC core
2193 * @param platform platform to register
2195 int snd_soc_register_platform(struct snd_soc_platform
*platform
)
2197 if (!platform
->name
)
2200 INIT_LIST_HEAD(&platform
->list
);
2202 mutex_lock(&client_mutex
);
2203 list_add(&platform
->list
, &platform_list
);
2204 snd_soc_instantiate_cards();
2205 mutex_unlock(&client_mutex
);
2207 pr_debug("Registered platform '%s'\n", platform
->name
);
2211 EXPORT_SYMBOL_GPL(snd_soc_register_platform
);
2214 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2216 * @param platform platform to unregister
2218 void snd_soc_unregister_platform(struct snd_soc_platform
*platform
)
2220 mutex_lock(&client_mutex
);
2221 list_del(&platform
->list
);
2222 mutex_unlock(&client_mutex
);
2224 pr_debug("Unregistered platform '%s'\n", platform
->name
);
2226 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform
);
2229 * snd_soc_register_codec - Register a codec with the ASoC core
2231 * @param codec codec to register
2233 int snd_soc_register_codec(struct snd_soc_codec
*codec
)
2238 /* The device should become mandatory over time */
2240 printk(KERN_WARNING
"No device for codec %s\n", codec
->name
);
2242 INIT_LIST_HEAD(&codec
->list
);
2244 mutex_lock(&client_mutex
);
2245 list_add(&codec
->list
, &codec_list
);
2246 snd_soc_instantiate_cards();
2247 mutex_unlock(&client_mutex
);
2249 pr_debug("Registered codec '%s'\n", codec
->name
);
2253 EXPORT_SYMBOL_GPL(snd_soc_register_codec
);
2256 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2258 * @param codec codec to unregister
2260 void snd_soc_unregister_codec(struct snd_soc_codec
*codec
)
2262 mutex_lock(&client_mutex
);
2263 list_del(&codec
->list
);
2264 mutex_unlock(&client_mutex
);
2266 pr_debug("Unregistered codec '%s'\n", codec
->name
);
2268 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec
);
2270 static int __init
snd_soc_init(void)
2272 #ifdef CONFIG_DEBUG_FS
2273 debugfs_root
= debugfs_create_dir("asoc", NULL
);
2274 if (IS_ERR(debugfs_root
) || !debugfs_root
) {
2276 "ASoC: Failed to create debugfs directory\n");
2277 debugfs_root
= NULL
;
2281 return platform_driver_register(&soc_driver
);
2284 static void __exit
snd_soc_exit(void)
2286 #ifdef CONFIG_DEBUG_FS
2287 debugfs_remove_recursive(debugfs_root
);
2289 platform_driver_unregister(&soc_driver
);
2292 module_init(snd_soc_init
);
2293 module_exit(snd_soc_exit
);
2295 /* Module information */
2296 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2297 MODULE_DESCRIPTION("ALSA SoC Core");
2298 MODULE_LICENSE("GPL");
2299 MODULE_ALIAS("platform:soc-audio");