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
);
51 static int snd_soc_register_card(struct snd_soc_card
*card
);
52 static int snd_soc_unregister_card(struct snd_soc_card
*card
);
55 * This is a timeout to do a DAPM powerdown after a stream is closed().
56 * It can be used to eliminate pops between different playback streams, e.g.
57 * between two audio tracks.
59 static int pmdown_time
= 5000;
60 module_param(pmdown_time
, int, 0);
61 MODULE_PARM_DESC(pmdown_time
, "DAPM stream powerdown time (msecs)");
64 * This function forces any delayed work to be queued and run.
66 static int run_delayed_work(struct delayed_work
*dwork
)
70 /* cancel any work waiting to be queued. */
71 ret
= cancel_delayed_work(dwork
);
73 /* if there was any work waiting then we run it now and
74 * wait for it's completion */
76 schedule_delayed_work(dwork
, 0);
77 flush_scheduled_work();
82 #ifdef CONFIG_SND_SOC_AC97_BUS
83 /* unregister ac97 codec */
84 static int soc_ac97_dev_unregister(struct snd_soc_codec
*codec
)
86 if (codec
->ac97
->dev
.bus
)
87 device_unregister(&codec
->ac97
->dev
);
91 /* stop no dev release warning */
92 static void soc_ac97_device_release(struct device
*dev
){}
94 /* register ac97 codec to bus */
95 static int soc_ac97_dev_register(struct snd_soc_codec
*codec
)
99 codec
->ac97
->dev
.bus
= &ac97_bus_type
;
100 codec
->ac97
->dev
.parent
= NULL
;
101 codec
->ac97
->dev
.release
= soc_ac97_device_release
;
103 dev_set_name(&codec
->ac97
->dev
, "%d-%d:%s",
104 codec
->card
->number
, 0, codec
->name
);
105 err
= device_register(&codec
->ac97
->dev
);
107 snd_printk(KERN_ERR
"Can't register ac97 bus\n");
108 codec
->ac97
->dev
.bus
= NULL
;
116 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
117 * then initialized and any private data can be allocated. This also calls
118 * startup for the cpu DAI, platform, machine and codec DAI.
120 static int soc_pcm_open(struct snd_pcm_substream
*substream
)
122 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
123 struct snd_soc_device
*socdev
= rtd
->socdev
;
124 struct snd_soc_card
*card
= socdev
->card
;
125 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
126 struct snd_soc_dai_link
*machine
= rtd
->dai
;
127 struct snd_soc_platform
*platform
= card
->platform
;
128 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
129 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
132 mutex_lock(&pcm_mutex
);
134 /* startup the audio subsystem */
135 if (cpu_dai
->ops
.startup
) {
136 ret
= cpu_dai
->ops
.startup(substream
, cpu_dai
);
138 printk(KERN_ERR
"asoc: can't open interface %s\n",
144 if (platform
->pcm_ops
->open
) {
145 ret
= platform
->pcm_ops
->open(substream
);
147 printk(KERN_ERR
"asoc: can't open platform %s\n", platform
->name
);
152 if (codec_dai
->ops
.startup
) {
153 ret
= codec_dai
->ops
.startup(substream
, codec_dai
);
155 printk(KERN_ERR
"asoc: can't open codec %s\n",
161 if (machine
->ops
&& machine
->ops
->startup
) {
162 ret
= machine
->ops
->startup(substream
);
164 printk(KERN_ERR
"asoc: %s startup failed\n", machine
->name
);
169 /* Check that the codec and cpu DAI's are compatible */
170 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
171 runtime
->hw
.rate_min
=
172 max(codec_dai
->playback
.rate_min
,
173 cpu_dai
->playback
.rate_min
);
174 runtime
->hw
.rate_max
=
175 min(codec_dai
->playback
.rate_max
,
176 cpu_dai
->playback
.rate_max
);
177 runtime
->hw
.channels_min
=
178 max(codec_dai
->playback
.channels_min
,
179 cpu_dai
->playback
.channels_min
);
180 runtime
->hw
.channels_max
=
181 min(codec_dai
->playback
.channels_max
,
182 cpu_dai
->playback
.channels_max
);
183 runtime
->hw
.formats
=
184 codec_dai
->playback
.formats
& cpu_dai
->playback
.formats
;
186 codec_dai
->playback
.rates
& cpu_dai
->playback
.rates
;
188 runtime
->hw
.rate_min
=
189 max(codec_dai
->capture
.rate_min
,
190 cpu_dai
->capture
.rate_min
);
191 runtime
->hw
.rate_max
=
192 min(codec_dai
->capture
.rate_max
,
193 cpu_dai
->capture
.rate_max
);
194 runtime
->hw
.channels_min
=
195 max(codec_dai
->capture
.channels_min
,
196 cpu_dai
->capture
.channels_min
);
197 runtime
->hw
.channels_max
=
198 min(codec_dai
->capture
.channels_max
,
199 cpu_dai
->capture
.channels_max
);
200 runtime
->hw
.formats
=
201 codec_dai
->capture
.formats
& cpu_dai
->capture
.formats
;
203 codec_dai
->capture
.rates
& cpu_dai
->capture
.rates
;
206 snd_pcm_limit_hw_rates(runtime
);
207 if (!runtime
->hw
.rates
) {
208 printk(KERN_ERR
"asoc: %s <-> %s No matching rates\n",
209 codec_dai
->name
, cpu_dai
->name
);
212 if (!runtime
->hw
.formats
) {
213 printk(KERN_ERR
"asoc: %s <-> %s No matching formats\n",
214 codec_dai
->name
, cpu_dai
->name
);
217 if (!runtime
->hw
.channels_min
|| !runtime
->hw
.channels_max
) {
218 printk(KERN_ERR
"asoc: %s <-> %s No matching channels\n",
219 codec_dai
->name
, cpu_dai
->name
);
223 pr_debug("asoc: %s <-> %s info:\n", codec_dai
->name
, cpu_dai
->name
);
224 pr_debug("asoc: rate mask 0x%x\n", runtime
->hw
.rates
);
225 pr_debug("asoc: min ch %d max ch %d\n", runtime
->hw
.channels_min
,
226 runtime
->hw
.channels_max
);
227 pr_debug("asoc: min rate %d max rate %d\n", runtime
->hw
.rate_min
,
228 runtime
->hw
.rate_max
);
230 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
231 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 1;
233 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 1;
234 cpu_dai
->active
= codec_dai
->active
= 1;
235 cpu_dai
->runtime
= runtime
;
236 socdev
->codec
->active
++;
237 mutex_unlock(&pcm_mutex
);
241 if (machine
->ops
&& machine
->ops
->shutdown
)
242 machine
->ops
->shutdown(substream
);
245 if (platform
->pcm_ops
->close
)
246 platform
->pcm_ops
->close(substream
);
249 if (cpu_dai
->ops
.shutdown
)
250 cpu_dai
->ops
.shutdown(substream
, cpu_dai
);
252 mutex_unlock(&pcm_mutex
);
257 * Power down the audio subsystem pmdown_time msecs after close is called.
258 * This is to ensure there are no pops or clicks in between any music tracks
259 * due to DAPM power cycling.
261 static void close_delayed_work(struct work_struct
*work
)
263 struct snd_soc_card
*card
= container_of(work
, struct snd_soc_card
,
265 struct snd_soc_device
*socdev
= card
->socdev
;
266 struct snd_soc_codec
*codec
= socdev
->codec
;
267 struct snd_soc_dai
*codec_dai
;
270 mutex_lock(&pcm_mutex
);
271 for (i
= 0; i
< codec
->num_dai
; i
++) {
272 codec_dai
= &codec
->dai
[i
];
274 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
275 codec_dai
->playback
.stream_name
,
276 codec_dai
->playback
.active
? "active" : "inactive",
277 codec_dai
->pop_wait
? "yes" : "no");
279 /* are we waiting on this codec DAI stream */
280 if (codec_dai
->pop_wait
== 1) {
282 /* Reduce power if no longer active */
283 if (codec
->active
== 0) {
284 pr_debug("pop wq D1 %s %s\n", codec
->name
,
285 codec_dai
->playback
.stream_name
);
286 snd_soc_dapm_set_bias_level(socdev
,
287 SND_SOC_BIAS_PREPARE
);
290 codec_dai
->pop_wait
= 0;
291 snd_soc_dapm_stream_event(codec
,
292 codec_dai
->playback
.stream_name
,
293 SND_SOC_DAPM_STREAM_STOP
);
295 /* Fall into standby if no longer active */
296 if (codec
->active
== 0) {
297 pr_debug("pop wq D3 %s %s\n", codec
->name
,
298 codec_dai
->playback
.stream_name
);
299 snd_soc_dapm_set_bias_level(socdev
,
300 SND_SOC_BIAS_STANDBY
);
304 mutex_unlock(&pcm_mutex
);
308 * Called by ALSA when a PCM substream is closed. Private data can be
309 * freed here. The cpu DAI, codec DAI, machine and platform are also
312 static int soc_codec_close(struct snd_pcm_substream
*substream
)
314 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
315 struct snd_soc_device
*socdev
= rtd
->socdev
;
316 struct snd_soc_card
*card
= socdev
->card
;
317 struct snd_soc_dai_link
*machine
= rtd
->dai
;
318 struct snd_soc_platform
*platform
= card
->platform
;
319 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
320 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
321 struct snd_soc_codec
*codec
= socdev
->codec
;
323 mutex_lock(&pcm_mutex
);
325 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
326 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 0;
328 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 0;
330 if (codec_dai
->playback
.active
== 0 &&
331 codec_dai
->capture
.active
== 0) {
332 cpu_dai
->active
= codec_dai
->active
= 0;
336 /* Muting the DAC suppresses artifacts caused during digital
337 * shutdown, for example from stopping clocks.
339 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
340 snd_soc_dai_digital_mute(codec_dai
, 1);
342 if (cpu_dai
->ops
.shutdown
)
343 cpu_dai
->ops
.shutdown(substream
, cpu_dai
);
345 if (codec_dai
->ops
.shutdown
)
346 codec_dai
->ops
.shutdown(substream
, codec_dai
);
348 if (machine
->ops
&& machine
->ops
->shutdown
)
349 machine
->ops
->shutdown(substream
);
351 if (platform
->pcm_ops
->close
)
352 platform
->pcm_ops
->close(substream
);
353 cpu_dai
->runtime
= NULL
;
355 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
356 /* start delayed pop wq here for playback streams */
357 codec_dai
->pop_wait
= 1;
358 schedule_delayed_work(&card
->delayed_work
,
359 msecs_to_jiffies(pmdown_time
));
361 /* capture streams can be powered down now */
362 snd_soc_dapm_stream_event(codec
,
363 codec_dai
->capture
.stream_name
,
364 SND_SOC_DAPM_STREAM_STOP
);
366 if (codec
->active
== 0 && codec_dai
->pop_wait
== 0)
367 snd_soc_dapm_set_bias_level(socdev
,
368 SND_SOC_BIAS_STANDBY
);
371 mutex_unlock(&pcm_mutex
);
376 * Called by ALSA when the PCM substream is prepared, can set format, sample
377 * rate, etc. This function is non atomic and can be called multiple times,
378 * it can refer to the runtime info.
380 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
382 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
383 struct snd_soc_device
*socdev
= rtd
->socdev
;
384 struct snd_soc_card
*card
= socdev
->card
;
385 struct snd_soc_dai_link
*machine
= rtd
->dai
;
386 struct snd_soc_platform
*platform
= card
->platform
;
387 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
388 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
389 struct snd_soc_codec
*codec
= socdev
->codec
;
392 mutex_lock(&pcm_mutex
);
394 if (machine
->ops
&& machine
->ops
->prepare
) {
395 ret
= machine
->ops
->prepare(substream
);
397 printk(KERN_ERR
"asoc: machine prepare error\n");
402 if (platform
->pcm_ops
->prepare
) {
403 ret
= platform
->pcm_ops
->prepare(substream
);
405 printk(KERN_ERR
"asoc: platform prepare error\n");
410 if (codec_dai
->ops
.prepare
) {
411 ret
= codec_dai
->ops
.prepare(substream
, codec_dai
);
413 printk(KERN_ERR
"asoc: codec DAI prepare error\n");
418 if (cpu_dai
->ops
.prepare
) {
419 ret
= cpu_dai
->ops
.prepare(substream
, cpu_dai
);
421 printk(KERN_ERR
"asoc: cpu DAI prepare error\n");
426 /* cancel any delayed stream shutdown that is pending */
427 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
428 codec_dai
->pop_wait
) {
429 codec_dai
->pop_wait
= 0;
430 cancel_delayed_work(&card
->delayed_work
);
433 /* do we need to power up codec */
434 if (codec
->bias_level
!= SND_SOC_BIAS_ON
) {
435 snd_soc_dapm_set_bias_level(socdev
,
436 SND_SOC_BIAS_PREPARE
);
438 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
439 snd_soc_dapm_stream_event(codec
,
440 codec_dai
->playback
.stream_name
,
441 SND_SOC_DAPM_STREAM_START
);
443 snd_soc_dapm_stream_event(codec
,
444 codec_dai
->capture
.stream_name
,
445 SND_SOC_DAPM_STREAM_START
);
447 snd_soc_dapm_set_bias_level(socdev
, SND_SOC_BIAS_ON
);
448 snd_soc_dai_digital_mute(codec_dai
, 0);
451 /* codec already powered - power on widgets */
452 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
453 snd_soc_dapm_stream_event(codec
,
454 codec_dai
->playback
.stream_name
,
455 SND_SOC_DAPM_STREAM_START
);
457 snd_soc_dapm_stream_event(codec
,
458 codec_dai
->capture
.stream_name
,
459 SND_SOC_DAPM_STREAM_START
);
461 snd_soc_dai_digital_mute(codec_dai
, 0);
465 mutex_unlock(&pcm_mutex
);
470 * Called by ALSA when the hardware params are set by application. This
471 * function can also be called multiple times and can allocate buffers
472 * (using snd_pcm_lib_* ). It's non-atomic.
474 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
475 struct snd_pcm_hw_params
*params
)
477 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
478 struct snd_soc_device
*socdev
= rtd
->socdev
;
479 struct snd_soc_dai_link
*machine
= rtd
->dai
;
480 struct snd_soc_card
*card
= socdev
->card
;
481 struct snd_soc_platform
*platform
= card
->platform
;
482 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
483 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
486 mutex_lock(&pcm_mutex
);
488 if (machine
->ops
&& machine
->ops
->hw_params
) {
489 ret
= machine
->ops
->hw_params(substream
, params
);
491 printk(KERN_ERR
"asoc: machine hw_params failed\n");
496 if (codec_dai
->ops
.hw_params
) {
497 ret
= codec_dai
->ops
.hw_params(substream
, params
, codec_dai
);
499 printk(KERN_ERR
"asoc: can't set codec %s hw params\n",
505 if (cpu_dai
->ops
.hw_params
) {
506 ret
= cpu_dai
->ops
.hw_params(substream
, params
, cpu_dai
);
508 printk(KERN_ERR
"asoc: interface %s hw params failed\n",
514 if (platform
->pcm_ops
->hw_params
) {
515 ret
= platform
->pcm_ops
->hw_params(substream
, params
);
517 printk(KERN_ERR
"asoc: platform %s hw params failed\n",
524 mutex_unlock(&pcm_mutex
);
528 if (cpu_dai
->ops
.hw_free
)
529 cpu_dai
->ops
.hw_free(substream
, cpu_dai
);
532 if (codec_dai
->ops
.hw_free
)
533 codec_dai
->ops
.hw_free(substream
, codec_dai
);
536 if (machine
->ops
&& machine
->ops
->hw_free
)
537 machine
->ops
->hw_free(substream
);
539 mutex_unlock(&pcm_mutex
);
544 * Free's resources allocated by hw_params, can be called multiple times
546 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
548 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
549 struct snd_soc_device
*socdev
= rtd
->socdev
;
550 struct snd_soc_dai_link
*machine
= rtd
->dai
;
551 struct snd_soc_card
*card
= socdev
->card
;
552 struct snd_soc_platform
*platform
= card
->platform
;
553 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
554 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
555 struct snd_soc_codec
*codec
= socdev
->codec
;
557 mutex_lock(&pcm_mutex
);
559 /* apply codec digital mute */
561 snd_soc_dai_digital_mute(codec_dai
, 1);
563 /* free any machine hw params */
564 if (machine
->ops
&& machine
->ops
->hw_free
)
565 machine
->ops
->hw_free(substream
);
567 /* free any DMA resources */
568 if (platform
->pcm_ops
->hw_free
)
569 platform
->pcm_ops
->hw_free(substream
);
571 /* now free hw params for the DAI's */
572 if (codec_dai
->ops
.hw_free
)
573 codec_dai
->ops
.hw_free(substream
, codec_dai
);
575 if (cpu_dai
->ops
.hw_free
)
576 cpu_dai
->ops
.hw_free(substream
, cpu_dai
);
578 mutex_unlock(&pcm_mutex
);
582 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
584 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
585 struct snd_soc_device
*socdev
= rtd
->socdev
;
586 struct snd_soc_card
*card
= socdev
->card
;
587 struct snd_soc_dai_link
*machine
= rtd
->dai
;
588 struct snd_soc_platform
*platform
= card
->platform
;
589 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
590 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
593 if (codec_dai
->ops
.trigger
) {
594 ret
= codec_dai
->ops
.trigger(substream
, cmd
, codec_dai
);
599 if (platform
->pcm_ops
->trigger
) {
600 ret
= platform
->pcm_ops
->trigger(substream
, cmd
);
605 if (cpu_dai
->ops
.trigger
) {
606 ret
= cpu_dai
->ops
.trigger(substream
, cmd
, cpu_dai
);
613 /* ASoC PCM operations */
614 static struct snd_pcm_ops soc_pcm_ops
= {
615 .open
= soc_pcm_open
,
616 .close
= soc_codec_close
,
617 .hw_params
= soc_pcm_hw_params
,
618 .hw_free
= soc_pcm_hw_free
,
619 .prepare
= soc_pcm_prepare
,
620 .trigger
= soc_pcm_trigger
,
624 /* powers down audio subsystem for suspend */
625 static int soc_suspend(struct platform_device
*pdev
, pm_message_t state
)
627 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
628 struct snd_soc_card
*card
= socdev
->card
;
629 struct snd_soc_platform
*platform
= card
->platform
;
630 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
631 struct snd_soc_codec
*codec
= socdev
->codec
;
634 /* Due to the resume being scheduled into a workqueue we could
635 * suspend before that's finished - wait for it to complete.
637 snd_power_lock(codec
->card
);
638 snd_power_wait(codec
->card
, SNDRV_CTL_POWER_D0
);
639 snd_power_unlock(codec
->card
);
641 /* we're going to block userspace touching us until resume completes */
642 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D3hot
);
644 /* mute any active DAC's */
645 for (i
= 0; i
< card
->num_links
; i
++) {
646 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
647 if (dai
->ops
.digital_mute
&& dai
->playback
.active
)
648 dai
->ops
.digital_mute(dai
, 1);
651 /* suspend all pcms */
652 for (i
= 0; i
< card
->num_links
; i
++)
653 snd_pcm_suspend_all(card
->dai_link
[i
].pcm
);
655 if (card
->suspend_pre
)
656 card
->suspend_pre(pdev
, state
);
658 for (i
= 0; i
< card
->num_links
; i
++) {
659 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
660 if (cpu_dai
->suspend
&& !cpu_dai
->ac97_control
)
661 cpu_dai
->suspend(cpu_dai
);
662 if (platform
->suspend
)
663 platform
->suspend(cpu_dai
);
666 /* close any waiting streams and save state */
667 run_delayed_work(&card
->delayed_work
);
668 codec
->suspend_bias_level
= codec
->bias_level
;
670 for (i
= 0; i
< codec
->num_dai
; i
++) {
671 char *stream
= codec
->dai
[i
].playback
.stream_name
;
673 snd_soc_dapm_stream_event(codec
, stream
,
674 SND_SOC_DAPM_STREAM_SUSPEND
);
675 stream
= codec
->dai
[i
].capture
.stream_name
;
677 snd_soc_dapm_stream_event(codec
, stream
,
678 SND_SOC_DAPM_STREAM_SUSPEND
);
681 if (codec_dev
->suspend
)
682 codec_dev
->suspend(pdev
, state
);
684 for (i
= 0; i
< card
->num_links
; i
++) {
685 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
686 if (cpu_dai
->suspend
&& cpu_dai
->ac97_control
)
687 cpu_dai
->suspend(cpu_dai
);
690 if (card
->suspend_post
)
691 card
->suspend_post(pdev
, state
);
696 /* deferred resume work, so resume can complete before we finished
697 * setting our codec back up, which can be very slow on I2C
699 static void soc_resume_deferred(struct work_struct
*work
)
701 struct snd_soc_card
*card
= container_of(work
,
703 deferred_resume_work
);
704 struct snd_soc_device
*socdev
= card
->socdev
;
705 struct snd_soc_platform
*platform
= card
->platform
;
706 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
707 struct snd_soc_codec
*codec
= socdev
->codec
;
708 struct platform_device
*pdev
= to_platform_device(socdev
->dev
);
711 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
712 * so userspace apps are blocked from touching us
715 dev_dbg(socdev
->dev
, "starting resume work\n");
717 if (card
->resume_pre
)
718 card
->resume_pre(pdev
);
720 for (i
= 0; i
< card
->num_links
; i
++) {
721 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
722 if (cpu_dai
->resume
&& cpu_dai
->ac97_control
)
723 cpu_dai
->resume(cpu_dai
);
726 if (codec_dev
->resume
)
727 codec_dev
->resume(pdev
);
729 for (i
= 0; i
< codec
->num_dai
; i
++) {
730 char *stream
= codec
->dai
[i
].playback
.stream_name
;
732 snd_soc_dapm_stream_event(codec
, stream
,
733 SND_SOC_DAPM_STREAM_RESUME
);
734 stream
= codec
->dai
[i
].capture
.stream_name
;
736 snd_soc_dapm_stream_event(codec
, stream
,
737 SND_SOC_DAPM_STREAM_RESUME
);
740 /* unmute any active DACs */
741 for (i
= 0; i
< card
->num_links
; i
++) {
742 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
743 if (dai
->ops
.digital_mute
&& dai
->playback
.active
)
744 dai
->ops
.digital_mute(dai
, 0);
747 for (i
= 0; i
< card
->num_links
; i
++) {
748 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
749 if (cpu_dai
->resume
&& !cpu_dai
->ac97_control
)
750 cpu_dai
->resume(cpu_dai
);
751 if (platform
->resume
)
752 platform
->resume(cpu_dai
);
755 if (card
->resume_post
)
756 card
->resume_post(pdev
);
758 dev_dbg(socdev
->dev
, "resume work completed\n");
760 /* userspace can access us now we are back as we were before */
761 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D0
);
764 /* powers up audio subsystem after a suspend */
765 static int soc_resume(struct platform_device
*pdev
)
767 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
768 struct snd_soc_card
*card
= socdev
->card
;
770 dev_dbg(socdev
->dev
, "scheduling resume work\n");
772 if (!schedule_work(&card
->deferred_resume_work
))
773 dev_err(socdev
->dev
, "resume work item may be lost\n");
779 #define soc_suspend NULL
780 #define soc_resume NULL
783 static void snd_soc_instantiate_card(struct snd_soc_card
*card
)
785 struct platform_device
*pdev
= container_of(card
->dev
,
786 struct platform_device
,
788 struct snd_soc_codec_device
*codec_dev
= card
->socdev
->codec_dev
;
789 struct snd_soc_platform
*platform
;
790 struct snd_soc_dai
*dai
;
791 int i
, found
, ret
, ac97
;
793 if (card
->instantiated
)
797 list_for_each_entry(platform
, &platform_list
, list
)
798 if (card
->platform
== platform
) {
803 dev_dbg(card
->dev
, "Platform %s not registered\n",
804 card
->platform
->name
);
809 for (i
= 0; i
< card
->num_links
; i
++) {
811 list_for_each_entry(dai
, &dai_list
, list
)
812 if (card
->dai_link
[i
].cpu_dai
== dai
) {
817 dev_dbg(card
->dev
, "DAI %s not registered\n",
818 card
->dai_link
[i
].cpu_dai
->name
);
822 if (card
->dai_link
[i
].cpu_dai
->ac97_control
)
826 /* If we have AC97 in the system then don't wait for the
827 * codec. This will need revisiting if we have to handle
828 * systems with mixed AC97 and non-AC97 parts. Only check for
829 * DAIs currently; we can't do this per link since some AC97
830 * codecs have non-AC97 DAIs.
833 for (i
= 0; i
< card
->num_links
; i
++) {
835 list_for_each_entry(dai
, &dai_list
, list
)
836 if (card
->dai_link
[i
].codec_dai
== dai
) {
841 dev_dbg(card
->dev
, "DAI %s not registered\n",
842 card
->dai_link
[i
].codec_dai
->name
);
847 /* Note that we do not current check for codec components */
849 dev_dbg(card
->dev
, "All components present, instantiating\n");
851 /* Found everything, bring it up */
853 ret
= card
->probe(pdev
);
858 for (i
= 0; i
< card
->num_links
; i
++) {
859 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
860 if (cpu_dai
->probe
) {
861 ret
= cpu_dai
->probe(pdev
, cpu_dai
);
867 if (codec_dev
->probe
) {
868 ret
= codec_dev
->probe(pdev
);
873 if (platform
->probe
) {
874 ret
= platform
->probe(pdev
);
879 /* DAPM stream work */
880 INIT_DELAYED_WORK(&card
->delayed_work
, close_delayed_work
);
882 /* deferred resume work */
883 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
886 card
->instantiated
= 1;
891 if (codec_dev
->remove
)
892 codec_dev
->remove(pdev
);
895 for (i
--; i
>= 0; i
--) {
896 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
898 cpu_dai
->remove(pdev
, cpu_dai
);
906 * Attempt to initialise any uninitalised cards. Must be called with
909 static void snd_soc_instantiate_cards(void)
911 struct snd_soc_card
*card
;
912 list_for_each_entry(card
, &card_list
, list
)
913 snd_soc_instantiate_card(card
);
916 /* probes a new socdev */
917 static int soc_probe(struct platform_device
*pdev
)
920 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
921 struct snd_soc_card
*card
= socdev
->card
;
923 /* Bodge while we push things out of socdev */
924 card
->socdev
= socdev
;
926 /* Bodge while we unpick instantiation */
927 card
->dev
= &pdev
->dev
;
928 ret
= snd_soc_register_card(card
);
930 dev_err(&pdev
->dev
, "Failed to register card\n");
937 /* removes a socdev */
938 static int soc_remove(struct platform_device
*pdev
)
941 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
942 struct snd_soc_card
*card
= socdev
->card
;
943 struct snd_soc_platform
*platform
= card
->platform
;
944 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
946 run_delayed_work(&card
->delayed_work
);
948 if (platform
->remove
)
949 platform
->remove(pdev
);
951 if (codec_dev
->remove
)
952 codec_dev
->remove(pdev
);
954 for (i
= 0; i
< card
->num_links
; i
++) {
955 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
957 cpu_dai
->remove(pdev
, cpu_dai
);
963 snd_soc_unregister_card(card
);
968 /* ASoC platform driver */
969 static struct platform_driver soc_driver
= {
972 .owner
= THIS_MODULE
,
975 .remove
= soc_remove
,
976 .suspend
= soc_suspend
,
977 .resume
= soc_resume
,
980 /* create a new pcm */
981 static int soc_new_pcm(struct snd_soc_device
*socdev
,
982 struct snd_soc_dai_link
*dai_link
, int num
)
984 struct snd_soc_codec
*codec
= socdev
->codec
;
985 struct snd_soc_card
*card
= socdev
->card
;
986 struct snd_soc_platform
*platform
= card
->platform
;
987 struct snd_soc_dai
*codec_dai
= dai_link
->codec_dai
;
988 struct snd_soc_dai
*cpu_dai
= dai_link
->cpu_dai
;
989 struct snd_soc_pcm_runtime
*rtd
;
992 int ret
= 0, playback
= 0, capture
= 0;
994 rtd
= kzalloc(sizeof(struct snd_soc_pcm_runtime
), GFP_KERNEL
);
999 rtd
->socdev
= socdev
;
1000 codec_dai
->codec
= socdev
->codec
;
1002 /* check client and interface hw capabilities */
1003 sprintf(new_name
, "%s %s-%d", dai_link
->stream_name
, codec_dai
->name
,
1006 if (codec_dai
->playback
.channels_min
)
1008 if (codec_dai
->capture
.channels_min
)
1011 ret
= snd_pcm_new(codec
->card
, new_name
, codec
->pcm_devs
++, playback
,
1014 printk(KERN_ERR
"asoc: can't create pcm for codec %s\n",
1020 dai_link
->pcm
= pcm
;
1021 pcm
->private_data
= rtd
;
1022 soc_pcm_ops
.mmap
= platform
->pcm_ops
->mmap
;
1023 soc_pcm_ops
.pointer
= platform
->pcm_ops
->pointer
;
1024 soc_pcm_ops
.ioctl
= platform
->pcm_ops
->ioctl
;
1025 soc_pcm_ops
.copy
= platform
->pcm_ops
->copy
;
1026 soc_pcm_ops
.silence
= platform
->pcm_ops
->silence
;
1027 soc_pcm_ops
.ack
= platform
->pcm_ops
->ack
;
1028 soc_pcm_ops
.page
= platform
->pcm_ops
->page
;
1031 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &soc_pcm_ops
);
1034 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &soc_pcm_ops
);
1036 ret
= platform
->pcm_new(codec
->card
, codec_dai
, pcm
);
1038 printk(KERN_ERR
"asoc: platform pcm constructor failed\n");
1043 pcm
->private_free
= platform
->pcm_free
;
1044 printk(KERN_INFO
"asoc: %s <-> %s mapping ok\n", codec_dai
->name
,
1049 /* codec register dump */
1050 static ssize_t
soc_codec_reg_show(struct snd_soc_device
*devdata
, char *buf
)
1052 struct snd_soc_codec
*codec
= devdata
->codec
;
1053 int i
, step
= 1, count
= 0;
1055 if (!codec
->reg_cache_size
)
1058 if (codec
->reg_cache_step
)
1059 step
= codec
->reg_cache_step
;
1061 count
+= sprintf(buf
, "%s registers\n", codec
->name
);
1062 for (i
= 0; i
< codec
->reg_cache_size
; i
+= step
) {
1063 count
+= sprintf(buf
+ count
, "%2x: ", i
);
1064 if (count
>= PAGE_SIZE
- 1)
1067 if (codec
->display_register
)
1068 count
+= codec
->display_register(codec
, buf
+ count
,
1069 PAGE_SIZE
- count
, i
);
1071 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
,
1072 "%4x", codec
->read(codec
, i
));
1074 if (count
>= PAGE_SIZE
- 1)
1077 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
, "\n");
1078 if (count
>= PAGE_SIZE
- 1)
1082 /* Truncate count; min() would cause a warning */
1083 if (count
>= PAGE_SIZE
)
1084 count
= PAGE_SIZE
- 1;
1088 static ssize_t
codec_reg_show(struct device
*dev
,
1089 struct device_attribute
*attr
, char *buf
)
1091 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
1092 return soc_codec_reg_show(devdata
, buf
);
1095 static DEVICE_ATTR(codec_reg
, 0444, codec_reg_show
, NULL
);
1097 #ifdef CONFIG_DEBUG_FS
1098 static int codec_reg_open_file(struct inode
*inode
, struct file
*file
)
1100 file
->private_data
= inode
->i_private
;
1104 static ssize_t
codec_reg_read_file(struct file
*file
, char __user
*user_buf
,
1105 size_t count
, loff_t
*ppos
)
1108 struct snd_soc_codec
*codec
= file
->private_data
;
1109 struct device
*card_dev
= codec
->card
->dev
;
1110 struct snd_soc_device
*devdata
= card_dev
->driver_data
;
1111 char *buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1114 ret
= soc_codec_reg_show(devdata
, buf
);
1116 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1121 static ssize_t
codec_reg_write_file(struct file
*file
,
1122 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
1127 unsigned long reg
, value
;
1129 struct snd_soc_codec
*codec
= file
->private_data
;
1131 buf_size
= min(count
, (sizeof(buf
)-1));
1132 if (copy_from_user(buf
, user_buf
, buf_size
))
1136 if (codec
->reg_cache_step
)
1137 step
= codec
->reg_cache_step
;
1139 while (*start
== ' ')
1141 reg
= simple_strtoul(start
, &start
, 16);
1142 if ((reg
>= codec
->reg_cache_size
) || (reg
% step
))
1144 while (*start
== ' ')
1146 if (strict_strtoul(start
, 16, &value
))
1148 codec
->write(codec
, reg
, value
);
1152 static const struct file_operations codec_reg_fops
= {
1153 .open
= codec_reg_open_file
,
1154 .read
= codec_reg_read_file
,
1155 .write
= codec_reg_write_file
,
1158 static void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
1160 codec
->debugfs_reg
= debugfs_create_file("codec_reg", 0644,
1161 debugfs_root
, codec
,
1163 if (!codec
->debugfs_reg
)
1165 "ASoC: Failed to create codec register debugfs file\n");
1167 codec
->debugfs_pop_time
= debugfs_create_u32("dapm_pop_time", 0744,
1170 if (!codec
->debugfs_pop_time
)
1172 "Failed to create pop time debugfs file\n");
1175 static void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
1177 debugfs_remove(codec
->debugfs_pop_time
);
1178 debugfs_remove(codec
->debugfs_reg
);
1183 static inline void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
1187 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
1193 * snd_soc_new_ac97_codec - initailise AC97 device
1194 * @codec: audio codec
1195 * @ops: AC97 bus operations
1196 * @num: AC97 codec number
1198 * Initialises AC97 codec resources for use by ad-hoc devices only.
1200 int snd_soc_new_ac97_codec(struct snd_soc_codec
*codec
,
1201 struct snd_ac97_bus_ops
*ops
, int num
)
1203 mutex_lock(&codec
->mutex
);
1205 codec
->ac97
= kzalloc(sizeof(struct snd_ac97
), GFP_KERNEL
);
1206 if (codec
->ac97
== NULL
) {
1207 mutex_unlock(&codec
->mutex
);
1211 codec
->ac97
->bus
= kzalloc(sizeof(struct snd_ac97_bus
), GFP_KERNEL
);
1212 if (codec
->ac97
->bus
== NULL
) {
1215 mutex_unlock(&codec
->mutex
);
1219 codec
->ac97
->bus
->ops
= ops
;
1220 codec
->ac97
->num
= num
;
1221 mutex_unlock(&codec
->mutex
);
1224 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec
);
1227 * snd_soc_free_ac97_codec - free AC97 codec device
1228 * @codec: audio codec
1230 * Frees AC97 codec device resources.
1232 void snd_soc_free_ac97_codec(struct snd_soc_codec
*codec
)
1234 mutex_lock(&codec
->mutex
);
1235 kfree(codec
->ac97
->bus
);
1238 mutex_unlock(&codec
->mutex
);
1240 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec
);
1243 * snd_soc_update_bits - update codec register bits
1244 * @codec: audio codec
1245 * @reg: codec register
1246 * @mask: register mask
1249 * Writes new register value.
1251 * Returns 1 for change else 0.
1253 int snd_soc_update_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1254 unsigned short mask
, unsigned short value
)
1257 unsigned short old
, new;
1259 mutex_lock(&io_mutex
);
1260 old
= snd_soc_read(codec
, reg
);
1261 new = (old
& ~mask
) | value
;
1262 change
= old
!= new;
1264 snd_soc_write(codec
, reg
, new);
1266 mutex_unlock(&io_mutex
);
1269 EXPORT_SYMBOL_GPL(snd_soc_update_bits
);
1272 * snd_soc_test_bits - test register for change
1273 * @codec: audio codec
1274 * @reg: codec register
1275 * @mask: register mask
1278 * Tests a register with a new value and checks if the new value is
1279 * different from the old value.
1281 * Returns 1 for change else 0.
1283 int snd_soc_test_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1284 unsigned short mask
, unsigned short value
)
1287 unsigned short old
, new;
1289 mutex_lock(&io_mutex
);
1290 old
= snd_soc_read(codec
, reg
);
1291 new = (old
& ~mask
) | value
;
1292 change
= old
!= new;
1293 mutex_unlock(&io_mutex
);
1297 EXPORT_SYMBOL_GPL(snd_soc_test_bits
);
1300 * snd_soc_new_pcms - create new sound card and pcms
1301 * @socdev: the SoC audio device
1303 * Create a new sound card based upon the codec and interface pcms.
1305 * Returns 0 for success, else error.
1307 int snd_soc_new_pcms(struct snd_soc_device
*socdev
, int idx
, const char *xid
)
1309 struct snd_soc_codec
*codec
= socdev
->codec
;
1310 struct snd_soc_card
*card
= socdev
->card
;
1313 mutex_lock(&codec
->mutex
);
1315 /* register a sound card */
1316 codec
->card
= snd_card_new(idx
, xid
, codec
->owner
, 0);
1318 printk(KERN_ERR
"asoc: can't create sound card for codec %s\n",
1320 mutex_unlock(&codec
->mutex
);
1324 codec
->card
->dev
= socdev
->dev
;
1325 codec
->card
->private_data
= codec
;
1326 strncpy(codec
->card
->driver
, codec
->name
, sizeof(codec
->card
->driver
));
1328 /* create the pcms */
1329 for (i
= 0; i
< card
->num_links
; i
++) {
1330 ret
= soc_new_pcm(socdev
, &card
->dai_link
[i
], i
);
1332 printk(KERN_ERR
"asoc: can't create pcm %s\n",
1333 card
->dai_link
[i
].stream_name
);
1334 mutex_unlock(&codec
->mutex
);
1339 mutex_unlock(&codec
->mutex
);
1342 EXPORT_SYMBOL_GPL(snd_soc_new_pcms
);
1345 * snd_soc_init_card - register sound card
1346 * @socdev: the SoC audio device
1348 * Register a SoC sound card. Also registers an AC97 device if the
1349 * codec is AC97 for ad hoc devices.
1351 * Returns 0 for success, else error.
1353 int snd_soc_init_card(struct snd_soc_device
*socdev
)
1355 struct snd_soc_codec
*codec
= socdev
->codec
;
1356 struct snd_soc_card
*card
= socdev
->card
;
1357 int ret
= 0, i
, ac97
= 0, err
= 0;
1359 for (i
= 0; i
< card
->num_links
; i
++) {
1360 if (card
->dai_link
[i
].init
) {
1361 err
= card
->dai_link
[i
].init(codec
);
1363 printk(KERN_ERR
"asoc: failed to init %s\n",
1364 card
->dai_link
[i
].stream_name
);
1368 if (card
->dai_link
[i
].codec_dai
->ac97_control
)
1371 snprintf(codec
->card
->shortname
, sizeof(codec
->card
->shortname
),
1373 snprintf(codec
->card
->longname
, sizeof(codec
->card
->longname
),
1374 "%s (%s)", card
->name
, codec
->name
);
1376 ret
= snd_card_register(codec
->card
);
1378 printk(KERN_ERR
"asoc: failed to register soundcard for %s\n",
1383 mutex_lock(&codec
->mutex
);
1384 #ifdef CONFIG_SND_SOC_AC97_BUS
1386 ret
= soc_ac97_dev_register(codec
);
1388 printk(KERN_ERR
"asoc: AC97 device register failed\n");
1389 snd_card_free(codec
->card
);
1390 mutex_unlock(&codec
->mutex
);
1396 err
= snd_soc_dapm_sys_add(socdev
->dev
);
1398 printk(KERN_WARNING
"asoc: failed to add dapm sysfs entries\n");
1400 err
= device_create_file(socdev
->dev
, &dev_attr_codec_reg
);
1402 printk(KERN_WARNING
"asoc: failed to add codec sysfs files\n");
1404 soc_init_codec_debugfs(socdev
->codec
);
1405 mutex_unlock(&codec
->mutex
);
1410 EXPORT_SYMBOL_GPL(snd_soc_init_card
);
1413 * snd_soc_free_pcms - free sound card and pcms
1414 * @socdev: the SoC audio device
1416 * Frees sound card and pcms associated with the socdev.
1417 * Also unregister the codec if it is an AC97 device.
1419 void snd_soc_free_pcms(struct snd_soc_device
*socdev
)
1421 struct snd_soc_codec
*codec
= socdev
->codec
;
1422 #ifdef CONFIG_SND_SOC_AC97_BUS
1423 struct snd_soc_dai
*codec_dai
;
1427 mutex_lock(&codec
->mutex
);
1428 soc_cleanup_codec_debugfs(socdev
->codec
);
1429 #ifdef CONFIG_SND_SOC_AC97_BUS
1430 for (i
= 0; i
< codec
->num_dai
; i
++) {
1431 codec_dai
= &codec
->dai
[i
];
1432 if (codec_dai
->ac97_control
&& codec
->ac97
) {
1433 soc_ac97_dev_unregister(codec
);
1441 snd_card_free(codec
->card
);
1442 device_remove_file(socdev
->dev
, &dev_attr_codec_reg
);
1443 mutex_unlock(&codec
->mutex
);
1445 EXPORT_SYMBOL_GPL(snd_soc_free_pcms
);
1448 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1449 * @substream: the pcm substream
1450 * @hw: the hardware parameters
1452 * Sets the substream runtime hardware parameters.
1454 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
1455 const struct snd_pcm_hardware
*hw
)
1457 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1458 runtime
->hw
.info
= hw
->info
;
1459 runtime
->hw
.formats
= hw
->formats
;
1460 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
1461 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
1462 runtime
->hw
.periods_min
= hw
->periods_min
;
1463 runtime
->hw
.periods_max
= hw
->periods_max
;
1464 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
1465 runtime
->hw
.fifo_size
= hw
->fifo_size
;
1468 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
1471 * snd_soc_cnew - create new control
1472 * @_template: control template
1473 * @data: control private data
1474 * @lnng_name: control long name
1476 * Create a new mixer control from a template control.
1478 * Returns 0 for success, else error.
1480 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
1481 void *data
, char *long_name
)
1483 struct snd_kcontrol_new
template;
1485 memcpy(&template, _template
, sizeof(template));
1487 template.name
= long_name
;
1490 return snd_ctl_new1(&template, data
);
1492 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
1495 * snd_soc_info_enum_double - enumerated double mixer info callback
1496 * @kcontrol: mixer control
1497 * @uinfo: control element information
1499 * Callback to provide information about a double enumerated
1502 * Returns 0 for success.
1504 int snd_soc_info_enum_double(struct snd_kcontrol
*kcontrol
,
1505 struct snd_ctl_elem_info
*uinfo
)
1507 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1509 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1510 uinfo
->count
= e
->shift_l
== e
->shift_r
? 1 : 2;
1511 uinfo
->value
.enumerated
.items
= e
->max
;
1513 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1514 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1515 strcpy(uinfo
->value
.enumerated
.name
,
1516 e
->texts
[uinfo
->value
.enumerated
.item
]);
1519 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double
);
1522 * snd_soc_get_enum_double - enumerated double mixer get callback
1523 * @kcontrol: mixer control
1524 * @uinfo: control element information
1526 * Callback to get the value of a double enumerated mixer.
1528 * Returns 0 for success.
1530 int snd_soc_get_enum_double(struct snd_kcontrol
*kcontrol
,
1531 struct snd_ctl_elem_value
*ucontrol
)
1533 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1534 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1535 unsigned short val
, bitmask
;
1537 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1539 val
= snd_soc_read(codec
, e
->reg
);
1540 ucontrol
->value
.enumerated
.item
[0]
1541 = (val
>> e
->shift_l
) & (bitmask
- 1);
1542 if (e
->shift_l
!= e
->shift_r
)
1543 ucontrol
->value
.enumerated
.item
[1] =
1544 (val
>> e
->shift_r
) & (bitmask
- 1);
1548 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double
);
1551 * snd_soc_put_enum_double - enumerated double mixer put callback
1552 * @kcontrol: mixer control
1553 * @uinfo: control element information
1555 * Callback to set the value of a double enumerated mixer.
1557 * Returns 0 for success.
1559 int snd_soc_put_enum_double(struct snd_kcontrol
*kcontrol
,
1560 struct snd_ctl_elem_value
*ucontrol
)
1562 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1563 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1565 unsigned short mask
, bitmask
;
1567 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1569 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1571 val
= ucontrol
->value
.enumerated
.item
[0] << e
->shift_l
;
1572 mask
= (bitmask
- 1) << e
->shift_l
;
1573 if (e
->shift_l
!= e
->shift_r
) {
1574 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1576 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1577 mask
|= (bitmask
- 1) << e
->shift_r
;
1580 return snd_soc_update_bits(codec
, e
->reg
, mask
, val
);
1582 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double
);
1585 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1586 * @kcontrol: mixer control
1587 * @uinfo: control element information
1589 * Callback to provide information about an external enumerated
1592 * Returns 0 for success.
1594 int snd_soc_info_enum_ext(struct snd_kcontrol
*kcontrol
,
1595 struct snd_ctl_elem_info
*uinfo
)
1597 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1599 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1601 uinfo
->value
.enumerated
.items
= e
->max
;
1603 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1604 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1605 strcpy(uinfo
->value
.enumerated
.name
,
1606 e
->texts
[uinfo
->value
.enumerated
.item
]);
1609 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext
);
1612 * snd_soc_info_volsw_ext - external single mixer info callback
1613 * @kcontrol: mixer control
1614 * @uinfo: control element information
1616 * Callback to provide information about a single external mixer control.
1618 * Returns 0 for success.
1620 int snd_soc_info_volsw_ext(struct snd_kcontrol
*kcontrol
,
1621 struct snd_ctl_elem_info
*uinfo
)
1623 int max
= kcontrol
->private_value
;
1626 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1628 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1631 uinfo
->value
.integer
.min
= 0;
1632 uinfo
->value
.integer
.max
= max
;
1635 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext
);
1638 * snd_soc_info_volsw - single mixer info callback
1639 * @kcontrol: mixer control
1640 * @uinfo: control element information
1642 * Callback to provide information about a single mixer control.
1644 * Returns 0 for success.
1646 int snd_soc_info_volsw(struct snd_kcontrol
*kcontrol
,
1647 struct snd_ctl_elem_info
*uinfo
)
1649 struct soc_mixer_control
*mc
=
1650 (struct soc_mixer_control
*)kcontrol
->private_value
;
1652 unsigned int shift
= mc
->shift
;
1653 unsigned int rshift
= mc
->rshift
;
1656 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1658 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1660 uinfo
->count
= shift
== rshift
? 1 : 2;
1661 uinfo
->value
.integer
.min
= 0;
1662 uinfo
->value
.integer
.max
= max
;
1665 EXPORT_SYMBOL_GPL(snd_soc_info_volsw
);
1668 * snd_soc_get_volsw - single mixer get callback
1669 * @kcontrol: mixer control
1670 * @uinfo: control element information
1672 * Callback to get the value of a single mixer control.
1674 * Returns 0 for success.
1676 int snd_soc_get_volsw(struct snd_kcontrol
*kcontrol
,
1677 struct snd_ctl_elem_value
*ucontrol
)
1679 struct soc_mixer_control
*mc
=
1680 (struct soc_mixer_control
*)kcontrol
->private_value
;
1681 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1682 unsigned int reg
= mc
->reg
;
1683 unsigned int shift
= mc
->shift
;
1684 unsigned int rshift
= mc
->rshift
;
1686 unsigned int mask
= (1 << fls(max
)) - 1;
1687 unsigned int invert
= mc
->invert
;
1689 ucontrol
->value
.integer
.value
[0] =
1690 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1691 if (shift
!= rshift
)
1692 ucontrol
->value
.integer
.value
[1] =
1693 (snd_soc_read(codec
, reg
) >> rshift
) & mask
;
1695 ucontrol
->value
.integer
.value
[0] =
1696 max
- ucontrol
->value
.integer
.value
[0];
1697 if (shift
!= rshift
)
1698 ucontrol
->value
.integer
.value
[1] =
1699 max
- ucontrol
->value
.integer
.value
[1];
1704 EXPORT_SYMBOL_GPL(snd_soc_get_volsw
);
1707 * snd_soc_put_volsw - single mixer put callback
1708 * @kcontrol: mixer control
1709 * @uinfo: control element information
1711 * Callback to set the value of a single mixer control.
1713 * Returns 0 for success.
1715 int snd_soc_put_volsw(struct snd_kcontrol
*kcontrol
,
1716 struct snd_ctl_elem_value
*ucontrol
)
1718 struct soc_mixer_control
*mc
=
1719 (struct soc_mixer_control
*)kcontrol
->private_value
;
1720 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1721 unsigned int reg
= mc
->reg
;
1722 unsigned int shift
= mc
->shift
;
1723 unsigned int rshift
= mc
->rshift
;
1725 unsigned int mask
= (1 << fls(max
)) - 1;
1726 unsigned int invert
= mc
->invert
;
1727 unsigned short val
, val2
, val_mask
;
1729 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1732 val_mask
= mask
<< shift
;
1734 if (shift
!= rshift
) {
1735 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1738 val_mask
|= mask
<< rshift
;
1739 val
|= val2
<< rshift
;
1741 return snd_soc_update_bits(codec
, reg
, val_mask
, val
);
1743 EXPORT_SYMBOL_GPL(snd_soc_put_volsw
);
1746 * snd_soc_info_volsw_2r - double mixer info callback
1747 * @kcontrol: mixer control
1748 * @uinfo: control element information
1750 * Callback to provide information about a double mixer control that
1751 * spans 2 codec registers.
1753 * Returns 0 for success.
1755 int snd_soc_info_volsw_2r(struct snd_kcontrol
*kcontrol
,
1756 struct snd_ctl_elem_info
*uinfo
)
1758 struct soc_mixer_control
*mc
=
1759 (struct soc_mixer_control
*)kcontrol
->private_value
;
1763 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1765 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1768 uinfo
->value
.integer
.min
= 0;
1769 uinfo
->value
.integer
.max
= max
;
1772 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r
);
1775 * snd_soc_get_volsw_2r - double mixer get callback
1776 * @kcontrol: mixer control
1777 * @uinfo: control element information
1779 * Callback to get the value of a double mixer control that spans 2 registers.
1781 * Returns 0 for success.
1783 int snd_soc_get_volsw_2r(struct snd_kcontrol
*kcontrol
,
1784 struct snd_ctl_elem_value
*ucontrol
)
1786 struct soc_mixer_control
*mc
=
1787 (struct soc_mixer_control
*)kcontrol
->private_value
;
1788 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1789 unsigned int reg
= mc
->reg
;
1790 unsigned int reg2
= mc
->rreg
;
1791 unsigned int shift
= mc
->shift
;
1793 unsigned int mask
= (1<<fls(max
))-1;
1794 unsigned int invert
= mc
->invert
;
1796 ucontrol
->value
.integer
.value
[0] =
1797 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1798 ucontrol
->value
.integer
.value
[1] =
1799 (snd_soc_read(codec
, reg2
) >> shift
) & mask
;
1801 ucontrol
->value
.integer
.value
[0] =
1802 max
- ucontrol
->value
.integer
.value
[0];
1803 ucontrol
->value
.integer
.value
[1] =
1804 max
- ucontrol
->value
.integer
.value
[1];
1809 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r
);
1812 * snd_soc_put_volsw_2r - double mixer set callback
1813 * @kcontrol: mixer control
1814 * @uinfo: control element information
1816 * Callback to set the value of a double mixer control that spans 2 registers.
1818 * Returns 0 for success.
1820 int snd_soc_put_volsw_2r(struct snd_kcontrol
*kcontrol
,
1821 struct snd_ctl_elem_value
*ucontrol
)
1823 struct soc_mixer_control
*mc
=
1824 (struct soc_mixer_control
*)kcontrol
->private_value
;
1825 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1826 unsigned int reg
= mc
->reg
;
1827 unsigned int reg2
= mc
->rreg
;
1828 unsigned int shift
= mc
->shift
;
1830 unsigned int mask
= (1 << fls(max
)) - 1;
1831 unsigned int invert
= mc
->invert
;
1833 unsigned short val
, val2
, val_mask
;
1835 val_mask
= mask
<< shift
;
1836 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1837 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1845 val2
= val2
<< shift
;
1847 err
= snd_soc_update_bits(codec
, reg
, val_mask
, val
);
1851 err
= snd_soc_update_bits(codec
, reg2
, val_mask
, val2
);
1854 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r
);
1857 * snd_soc_info_volsw_s8 - signed mixer info callback
1858 * @kcontrol: mixer control
1859 * @uinfo: control element information
1861 * Callback to provide information about a signed mixer control.
1863 * Returns 0 for success.
1865 int snd_soc_info_volsw_s8(struct snd_kcontrol
*kcontrol
,
1866 struct snd_ctl_elem_info
*uinfo
)
1868 struct soc_mixer_control
*mc
=
1869 (struct soc_mixer_control
*)kcontrol
->private_value
;
1873 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1875 uinfo
->value
.integer
.min
= 0;
1876 uinfo
->value
.integer
.max
= max
-min
;
1879 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8
);
1882 * snd_soc_get_volsw_s8 - signed mixer get callback
1883 * @kcontrol: mixer control
1884 * @uinfo: control element information
1886 * Callback to get the value of a signed mixer control.
1888 * Returns 0 for success.
1890 int snd_soc_get_volsw_s8(struct snd_kcontrol
*kcontrol
,
1891 struct snd_ctl_elem_value
*ucontrol
)
1893 struct soc_mixer_control
*mc
=
1894 (struct soc_mixer_control
*)kcontrol
->private_value
;
1895 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1896 unsigned int reg
= mc
->reg
;
1898 int val
= snd_soc_read(codec
, reg
);
1900 ucontrol
->value
.integer
.value
[0] =
1901 ((signed char)(val
& 0xff))-min
;
1902 ucontrol
->value
.integer
.value
[1] =
1903 ((signed char)((val
>> 8) & 0xff))-min
;
1906 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8
);
1909 * snd_soc_put_volsw_sgn - signed mixer put callback
1910 * @kcontrol: mixer control
1911 * @uinfo: control element information
1913 * Callback to set the value of a signed mixer control.
1915 * Returns 0 for success.
1917 int snd_soc_put_volsw_s8(struct snd_kcontrol
*kcontrol
,
1918 struct snd_ctl_elem_value
*ucontrol
)
1920 struct soc_mixer_control
*mc
=
1921 (struct soc_mixer_control
*)kcontrol
->private_value
;
1922 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1923 unsigned int reg
= mc
->reg
;
1927 val
= (ucontrol
->value
.integer
.value
[0]+min
) & 0xff;
1928 val
|= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff) << 8;
1930 return snd_soc_update_bits(codec
, reg
, 0xffff, val
);
1932 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8
);
1935 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1937 * @clk_id: DAI specific clock ID
1938 * @freq: new clock frequency in Hz
1939 * @dir: new clock direction - input/output.
1941 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1943 int snd_soc_dai_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
1944 unsigned int freq
, int dir
)
1946 if (dai
->ops
.set_sysclk
)
1947 return dai
->ops
.set_sysclk(dai
, clk_id
, freq
, dir
);
1951 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk
);
1954 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
1956 * @clk_id: DAI specific clock divider ID
1957 * @div: new clock divisor.
1959 * Configures the clock dividers. This is used to derive the best DAI bit and
1960 * frame clocks from the system or master clock. It's best to set the DAI bit
1961 * and frame clocks as low as possible to save system power.
1963 int snd_soc_dai_set_clkdiv(struct snd_soc_dai
*dai
,
1964 int div_id
, int div
)
1966 if (dai
->ops
.set_clkdiv
)
1967 return dai
->ops
.set_clkdiv(dai
, div_id
, div
);
1971 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv
);
1974 * snd_soc_dai_set_pll - configure DAI PLL.
1976 * @pll_id: DAI specific PLL ID
1977 * @freq_in: PLL input clock frequency in Hz
1978 * @freq_out: requested PLL output clock frequency in Hz
1980 * Configures and enables PLL to generate output clock based on input clock.
1982 int snd_soc_dai_set_pll(struct snd_soc_dai
*dai
,
1983 int pll_id
, unsigned int freq_in
, unsigned int freq_out
)
1985 if (dai
->ops
.set_pll
)
1986 return dai
->ops
.set_pll(dai
, pll_id
, freq_in
, freq_out
);
1990 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll
);
1993 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
1995 * @fmt: SND_SOC_DAIFMT_ format value.
1997 * Configures the DAI hardware format and clocking.
1999 int snd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
2001 if (dai
->ops
.set_fmt
)
2002 return dai
->ops
.set_fmt(dai
, fmt
);
2006 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt
);
2009 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2011 * @mask: DAI specific mask representing used slots.
2012 * @slots: Number of slots in use.
2014 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2017 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai
*dai
,
2018 unsigned int mask
, int slots
)
2020 if (dai
->ops
.set_sysclk
)
2021 return dai
->ops
.set_tdm_slot(dai
, mask
, slots
);
2025 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot
);
2028 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2030 * @tristate: tristate enable
2032 * Tristates the DAI so that others can use it.
2034 int snd_soc_dai_set_tristate(struct snd_soc_dai
*dai
, int tristate
)
2036 if (dai
->ops
.set_sysclk
)
2037 return dai
->ops
.set_tristate(dai
, tristate
);
2041 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate
);
2044 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2046 * @mute: mute enable
2048 * Mutes the DAI DAC.
2050 int snd_soc_dai_digital_mute(struct snd_soc_dai
*dai
, int mute
)
2052 if (dai
->ops
.digital_mute
)
2053 return dai
->ops
.digital_mute(dai
, mute
);
2057 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute
);
2060 * snd_soc_register_card - Register a card with the ASoC core
2062 * @param card Card to register
2064 * Note that currently this is an internal only function: it will be
2065 * exposed to machine drivers after further backporting of ASoC v2
2066 * registration APIs.
2068 static int snd_soc_register_card(struct snd_soc_card
*card
)
2070 if (!card
->name
|| !card
->dev
)
2073 INIT_LIST_HEAD(&card
->list
);
2074 card
->instantiated
= 0;
2076 mutex_lock(&client_mutex
);
2077 list_add(&card
->list
, &card_list
);
2078 snd_soc_instantiate_cards();
2079 mutex_unlock(&client_mutex
);
2081 dev_dbg(card
->dev
, "Registered card '%s'\n", card
->name
);
2087 * snd_soc_unregister_card - Unregister a card with the ASoC core
2089 * @param card Card to unregister
2091 * Note that currently this is an internal only function: it will be
2092 * exposed to machine drivers after further backporting of ASoC v2
2093 * registration APIs.
2095 static int snd_soc_unregister_card(struct snd_soc_card
*card
)
2097 mutex_lock(&client_mutex
);
2098 list_del(&card
->list
);
2099 mutex_unlock(&client_mutex
);
2101 dev_dbg(card
->dev
, "Unregistered card '%s'\n", card
->name
);
2107 * snd_soc_register_dai - Register a DAI with the ASoC core
2109 * @param dai DAI to register
2111 int snd_soc_register_dai(struct snd_soc_dai
*dai
)
2116 /* The device should become mandatory over time */
2118 printk(KERN_WARNING
"No device for DAI %s\n", dai
->name
);
2120 INIT_LIST_HEAD(&dai
->list
);
2122 mutex_lock(&client_mutex
);
2123 list_add(&dai
->list
, &dai_list
);
2124 snd_soc_instantiate_cards();
2125 mutex_unlock(&client_mutex
);
2127 pr_debug("Registered DAI '%s'\n", dai
->name
);
2131 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2134 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2136 * @param dai DAI to unregister
2138 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2140 mutex_lock(&client_mutex
);
2141 list_del(&dai
->list
);
2142 mutex_unlock(&client_mutex
);
2144 pr_debug("Unregistered DAI '%s'\n", dai
->name
);
2146 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2149 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2151 * @param dai Array of DAIs to register
2152 * @param count Number of DAIs
2154 int snd_soc_register_dais(struct snd_soc_dai
*dai
, size_t count
)
2158 for (i
= 0; i
< count
; i
++) {
2159 ret
= snd_soc_register_dai(&dai
[i
]);
2167 for (i
--; i
>= 0; i
--)
2168 snd_soc_unregister_dai(&dai
[i
]);
2172 EXPORT_SYMBOL_GPL(snd_soc_register_dais
);
2175 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2177 * @param dai Array of DAIs to unregister
2178 * @param count Number of DAIs
2180 void snd_soc_unregister_dais(struct snd_soc_dai
*dai
, size_t count
)
2184 for (i
= 0; i
< count
; i
++)
2185 snd_soc_unregister_dai(&dai
[i
]);
2187 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais
);
2190 * snd_soc_register_platform - Register a platform with the ASoC core
2192 * @param platform platform to register
2194 int snd_soc_register_platform(struct snd_soc_platform
*platform
)
2196 if (!platform
->name
)
2199 INIT_LIST_HEAD(&platform
->list
);
2201 mutex_lock(&client_mutex
);
2202 list_add(&platform
->list
, &platform_list
);
2203 snd_soc_instantiate_cards();
2204 mutex_unlock(&client_mutex
);
2206 pr_debug("Registered platform '%s'\n", platform
->name
);
2210 EXPORT_SYMBOL_GPL(snd_soc_register_platform
);
2213 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2215 * @param platform platform to unregister
2217 void snd_soc_unregister_platform(struct snd_soc_platform
*platform
)
2219 mutex_lock(&client_mutex
);
2220 list_del(&platform
->list
);
2221 mutex_unlock(&client_mutex
);
2223 pr_debug("Unregistered platform '%s'\n", platform
->name
);
2225 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform
);
2227 static int __init
snd_soc_init(void)
2229 #ifdef CONFIG_DEBUG_FS
2230 debugfs_root
= debugfs_create_dir("asoc", NULL
);
2231 if (IS_ERR(debugfs_root
) || !debugfs_root
) {
2233 "ASoC: Failed to create debugfs directory\n");
2234 debugfs_root
= NULL
;
2238 return platform_driver_register(&soc_driver
);
2241 static void __exit
snd_soc_exit(void)
2243 #ifdef CONFIG_DEBUG_FS
2244 debugfs_remove_recursive(debugfs_root
);
2246 platform_driver_unregister(&soc_driver
);
2249 module_init(snd_soc_init
);
2250 module_exit(snd_soc_exit
);
2252 /* Module information */
2253 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2254 MODULE_DESCRIPTION("ALSA SoC Core");
2255 MODULE_LICENSE("GPL");
2256 MODULE_ALIAS("platform:soc-audio");