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/ac97_codec.h>
32 #include <sound/core.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/soc.h>
36 #include <sound/soc-dapm.h>
37 #include <sound/initval.h>
39 static DEFINE_MUTEX(pcm_mutex
);
40 static DEFINE_MUTEX(io_mutex
);
41 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq
);
43 #ifdef CONFIG_DEBUG_FS
44 static struct dentry
*debugfs_root
;
47 static DEFINE_MUTEX(client_mutex
);
48 static LIST_HEAD(card_list
);
49 static LIST_HEAD(dai_list
);
50 static LIST_HEAD(platform_list
);
51 static LIST_HEAD(codec_list
);
53 static int snd_soc_register_card(struct snd_soc_card
*card
);
54 static int snd_soc_unregister_card(struct snd_soc_card
*card
);
57 * This is a timeout to do a DAPM powerdown after a stream is closed().
58 * It can be used to eliminate pops between different playback streams, e.g.
59 * between two audio tracks.
61 static int pmdown_time
= 5000;
62 module_param(pmdown_time
, int, 0);
63 MODULE_PARM_DESC(pmdown_time
, "DAPM stream powerdown time (msecs)");
66 * This function forces any delayed work to be queued and run.
68 static int run_delayed_work(struct delayed_work
*dwork
)
72 /* cancel any work waiting to be queued. */
73 ret
= cancel_delayed_work(dwork
);
75 /* if there was any work waiting then we run it now and
76 * wait for it's completion */
78 schedule_delayed_work(dwork
, 0);
79 flush_scheduled_work();
84 #ifdef CONFIG_SND_SOC_AC97_BUS
85 /* unregister ac97 codec */
86 static int soc_ac97_dev_unregister(struct snd_soc_codec
*codec
)
88 if (codec
->ac97
->dev
.bus
)
89 device_unregister(&codec
->ac97
->dev
);
93 /* stop no dev release warning */
94 static void soc_ac97_device_release(struct device
*dev
){}
96 /* register ac97 codec to bus */
97 static int soc_ac97_dev_register(struct snd_soc_codec
*codec
)
101 codec
->ac97
->dev
.bus
= &ac97_bus_type
;
102 codec
->ac97
->dev
.parent
= codec
->card
->dev
;
103 codec
->ac97
->dev
.release
= soc_ac97_device_release
;
105 dev_set_name(&codec
->ac97
->dev
, "%d-%d:%s",
106 codec
->card
->number
, 0, codec
->name
);
107 err
= device_register(&codec
->ac97
->dev
);
109 snd_printk(KERN_ERR
"Can't register ac97 bus\n");
110 codec
->ac97
->dev
.bus
= NULL
;
117 static int soc_pcm_apply_symmetry(struct snd_pcm_substream
*substream
)
119 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
120 struct snd_soc_device
*socdev
= rtd
->socdev
;
121 struct snd_soc_card
*card
= socdev
->card
;
122 struct snd_soc_dai_link
*machine
= rtd
->dai
;
123 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
124 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
127 if (codec_dai
->symmetric_rates
|| cpu_dai
->symmetric_rates
||
128 machine
->symmetric_rates
) {
129 dev_dbg(card
->dev
, "Symmetry forces %dHz rate\n",
132 ret
= snd_pcm_hw_constraint_minmax(substream
->runtime
,
133 SNDRV_PCM_HW_PARAM_RATE
,
138 "Unable to apply rate symmetry constraint: %d\n", ret
);
147 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
148 * then initialized and any private data can be allocated. This also calls
149 * startup for the cpu DAI, platform, machine and codec DAI.
151 static int soc_pcm_open(struct snd_pcm_substream
*substream
)
153 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
154 struct snd_soc_device
*socdev
= rtd
->socdev
;
155 struct snd_soc_card
*card
= socdev
->card
;
156 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
157 struct snd_soc_dai_link
*machine
= rtd
->dai
;
158 struct snd_soc_platform
*platform
= card
->platform
;
159 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
160 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
163 mutex_lock(&pcm_mutex
);
165 /* startup the audio subsystem */
166 if (cpu_dai
->ops
->startup
) {
167 ret
= cpu_dai
->ops
->startup(substream
, cpu_dai
);
169 printk(KERN_ERR
"asoc: can't open interface %s\n",
175 if (platform
->pcm_ops
->open
) {
176 ret
= platform
->pcm_ops
->open(substream
);
178 printk(KERN_ERR
"asoc: can't open platform %s\n", platform
->name
);
183 if (codec_dai
->ops
->startup
) {
184 ret
= codec_dai
->ops
->startup(substream
, codec_dai
);
186 printk(KERN_ERR
"asoc: can't open codec %s\n",
192 if (machine
->ops
&& machine
->ops
->startup
) {
193 ret
= machine
->ops
->startup(substream
);
195 printk(KERN_ERR
"asoc: %s startup failed\n", machine
->name
);
200 /* Check that the codec and cpu DAI's are compatible */
201 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
202 runtime
->hw
.rate_min
=
203 max(codec_dai
->playback
.rate_min
,
204 cpu_dai
->playback
.rate_min
);
205 runtime
->hw
.rate_max
=
206 min(codec_dai
->playback
.rate_max
,
207 cpu_dai
->playback
.rate_max
);
208 runtime
->hw
.channels_min
=
209 max(codec_dai
->playback
.channels_min
,
210 cpu_dai
->playback
.channels_min
);
211 runtime
->hw
.channels_max
=
212 min(codec_dai
->playback
.channels_max
,
213 cpu_dai
->playback
.channels_max
);
214 runtime
->hw
.formats
=
215 codec_dai
->playback
.formats
& cpu_dai
->playback
.formats
;
217 codec_dai
->playback
.rates
& cpu_dai
->playback
.rates
;
219 runtime
->hw
.rate_min
=
220 max(codec_dai
->capture
.rate_min
,
221 cpu_dai
->capture
.rate_min
);
222 runtime
->hw
.rate_max
=
223 min(codec_dai
->capture
.rate_max
,
224 cpu_dai
->capture
.rate_max
);
225 runtime
->hw
.channels_min
=
226 max(codec_dai
->capture
.channels_min
,
227 cpu_dai
->capture
.channels_min
);
228 runtime
->hw
.channels_max
=
229 min(codec_dai
->capture
.channels_max
,
230 cpu_dai
->capture
.channels_max
);
231 runtime
->hw
.formats
=
232 codec_dai
->capture
.formats
& cpu_dai
->capture
.formats
;
234 codec_dai
->capture
.rates
& cpu_dai
->capture
.rates
;
237 snd_pcm_limit_hw_rates(runtime
);
238 if (!runtime
->hw
.rates
) {
239 printk(KERN_ERR
"asoc: %s <-> %s No matching rates\n",
240 codec_dai
->name
, cpu_dai
->name
);
243 if (!runtime
->hw
.formats
) {
244 printk(KERN_ERR
"asoc: %s <-> %s No matching formats\n",
245 codec_dai
->name
, cpu_dai
->name
);
248 if (!runtime
->hw
.channels_min
|| !runtime
->hw
.channels_max
) {
249 printk(KERN_ERR
"asoc: %s <-> %s No matching channels\n",
250 codec_dai
->name
, cpu_dai
->name
);
254 /* Symmetry only applies if we've already got an active stream. */
255 if (cpu_dai
->active
|| codec_dai
->active
) {
256 ret
= soc_pcm_apply_symmetry(substream
);
261 pr_debug("asoc: %s <-> %s info:\n", codec_dai
->name
, cpu_dai
->name
);
262 pr_debug("asoc: rate mask 0x%x\n", runtime
->hw
.rates
);
263 pr_debug("asoc: min ch %d max ch %d\n", runtime
->hw
.channels_min
,
264 runtime
->hw
.channels_max
);
265 pr_debug("asoc: min rate %d max rate %d\n", runtime
->hw
.rate_min
,
266 runtime
->hw
.rate_max
);
268 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
269 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 1;
271 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 1;
272 cpu_dai
->active
= codec_dai
->active
= 1;
273 cpu_dai
->runtime
= runtime
;
274 card
->codec
->active
++;
275 mutex_unlock(&pcm_mutex
);
279 if (machine
->ops
&& machine
->ops
->shutdown
)
280 machine
->ops
->shutdown(substream
);
283 if (platform
->pcm_ops
->close
)
284 platform
->pcm_ops
->close(substream
);
287 if (cpu_dai
->ops
->shutdown
)
288 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
290 mutex_unlock(&pcm_mutex
);
295 * Power down the audio subsystem pmdown_time msecs after close is called.
296 * This is to ensure there are no pops or clicks in between any music tracks
297 * due to DAPM power cycling.
299 static void close_delayed_work(struct work_struct
*work
)
301 struct snd_soc_card
*card
= container_of(work
, struct snd_soc_card
,
303 struct snd_soc_codec
*codec
= card
->codec
;
304 struct snd_soc_dai
*codec_dai
;
307 mutex_lock(&pcm_mutex
);
308 for (i
= 0; i
< codec
->num_dai
; i
++) {
309 codec_dai
= &codec
->dai
[i
];
311 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
312 codec_dai
->playback
.stream_name
,
313 codec_dai
->playback
.active
? "active" : "inactive",
314 codec_dai
->pop_wait
? "yes" : "no");
316 /* are we waiting on this codec DAI stream */
317 if (codec_dai
->pop_wait
== 1) {
318 codec_dai
->pop_wait
= 0;
319 snd_soc_dapm_stream_event(codec
,
320 codec_dai
->playback
.stream_name
,
321 SND_SOC_DAPM_STREAM_STOP
);
324 mutex_unlock(&pcm_mutex
);
328 * Called by ALSA when a PCM substream is closed. Private data can be
329 * freed here. The cpu DAI, codec DAI, machine and platform are also
332 static int soc_codec_close(struct snd_pcm_substream
*substream
)
334 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
335 struct snd_soc_device
*socdev
= rtd
->socdev
;
336 struct snd_soc_card
*card
= socdev
->card
;
337 struct snd_soc_dai_link
*machine
= rtd
->dai
;
338 struct snd_soc_platform
*platform
= card
->platform
;
339 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
340 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
341 struct snd_soc_codec
*codec
= card
->codec
;
343 mutex_lock(&pcm_mutex
);
345 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
346 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 0;
348 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 0;
350 if (codec_dai
->playback
.active
== 0 &&
351 codec_dai
->capture
.active
== 0) {
352 cpu_dai
->active
= codec_dai
->active
= 0;
356 /* Muting the DAC suppresses artifacts caused during digital
357 * shutdown, for example from stopping clocks.
359 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
360 snd_soc_dai_digital_mute(codec_dai
, 1);
362 if (cpu_dai
->ops
->shutdown
)
363 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
365 if (codec_dai
->ops
->shutdown
)
366 codec_dai
->ops
->shutdown(substream
, codec_dai
);
368 if (machine
->ops
&& machine
->ops
->shutdown
)
369 machine
->ops
->shutdown(substream
);
371 if (platform
->pcm_ops
->close
)
372 platform
->pcm_ops
->close(substream
);
373 cpu_dai
->runtime
= NULL
;
375 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
376 /* start delayed pop wq here for playback streams */
377 codec_dai
->pop_wait
= 1;
378 schedule_delayed_work(&card
->delayed_work
,
379 msecs_to_jiffies(pmdown_time
));
381 /* capture streams can be powered down now */
382 snd_soc_dapm_stream_event(codec
,
383 codec_dai
->capture
.stream_name
,
384 SND_SOC_DAPM_STREAM_STOP
);
387 mutex_unlock(&pcm_mutex
);
392 * Called by ALSA when the PCM substream is prepared, can set format, sample
393 * rate, etc. This function is non atomic and can be called multiple times,
394 * it can refer to the runtime info.
396 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
398 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
399 struct snd_soc_device
*socdev
= rtd
->socdev
;
400 struct snd_soc_card
*card
= socdev
->card
;
401 struct snd_soc_dai_link
*machine
= rtd
->dai
;
402 struct snd_soc_platform
*platform
= card
->platform
;
403 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
404 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
405 struct snd_soc_codec
*codec
= card
->codec
;
408 mutex_lock(&pcm_mutex
);
410 if (machine
->ops
&& machine
->ops
->prepare
) {
411 ret
= machine
->ops
->prepare(substream
);
413 printk(KERN_ERR
"asoc: machine prepare error\n");
418 if (platform
->pcm_ops
->prepare
) {
419 ret
= platform
->pcm_ops
->prepare(substream
);
421 printk(KERN_ERR
"asoc: platform prepare error\n");
426 if (codec_dai
->ops
->prepare
) {
427 ret
= codec_dai
->ops
->prepare(substream
, codec_dai
);
429 printk(KERN_ERR
"asoc: codec DAI prepare error\n");
434 if (cpu_dai
->ops
->prepare
) {
435 ret
= cpu_dai
->ops
->prepare(substream
, cpu_dai
);
437 printk(KERN_ERR
"asoc: cpu DAI prepare error\n");
442 /* cancel any delayed stream shutdown that is pending */
443 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
444 codec_dai
->pop_wait
) {
445 codec_dai
->pop_wait
= 0;
446 cancel_delayed_work(&card
->delayed_work
);
449 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
450 snd_soc_dapm_stream_event(codec
,
451 codec_dai
->playback
.stream_name
,
452 SND_SOC_DAPM_STREAM_START
);
454 snd_soc_dapm_stream_event(codec
,
455 codec_dai
->capture
.stream_name
,
456 SND_SOC_DAPM_STREAM_START
);
458 snd_soc_dai_digital_mute(codec_dai
, 0);
461 mutex_unlock(&pcm_mutex
);
466 * Called by ALSA when the hardware params are set by application. This
467 * function can also be called multiple times and can allocate buffers
468 * (using snd_pcm_lib_* ). It's non-atomic.
470 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
471 struct snd_pcm_hw_params
*params
)
473 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
474 struct snd_soc_device
*socdev
= rtd
->socdev
;
475 struct snd_soc_dai_link
*machine
= rtd
->dai
;
476 struct snd_soc_card
*card
= socdev
->card
;
477 struct snd_soc_platform
*platform
= card
->platform
;
478 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
479 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
482 mutex_lock(&pcm_mutex
);
484 if (machine
->ops
&& machine
->ops
->hw_params
) {
485 ret
= machine
->ops
->hw_params(substream
, params
);
487 printk(KERN_ERR
"asoc: machine hw_params failed\n");
492 if (codec_dai
->ops
->hw_params
) {
493 ret
= codec_dai
->ops
->hw_params(substream
, params
, codec_dai
);
495 printk(KERN_ERR
"asoc: can't set codec %s hw params\n",
501 if (cpu_dai
->ops
->hw_params
) {
502 ret
= cpu_dai
->ops
->hw_params(substream
, params
, cpu_dai
);
504 printk(KERN_ERR
"asoc: interface %s hw params failed\n",
510 if (platform
->pcm_ops
->hw_params
) {
511 ret
= platform
->pcm_ops
->hw_params(substream
, params
);
513 printk(KERN_ERR
"asoc: platform %s hw params failed\n",
519 machine
->rate
= params_rate(params
);
522 mutex_unlock(&pcm_mutex
);
526 if (cpu_dai
->ops
->hw_free
)
527 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
530 if (codec_dai
->ops
->hw_free
)
531 codec_dai
->ops
->hw_free(substream
, codec_dai
);
534 if (machine
->ops
&& machine
->ops
->hw_free
)
535 machine
->ops
->hw_free(substream
);
537 mutex_unlock(&pcm_mutex
);
542 * Free's resources allocated by hw_params, can be called multiple times
544 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
546 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
547 struct snd_soc_device
*socdev
= rtd
->socdev
;
548 struct snd_soc_dai_link
*machine
= rtd
->dai
;
549 struct snd_soc_card
*card
= socdev
->card
;
550 struct snd_soc_platform
*platform
= card
->platform
;
551 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
552 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
553 struct snd_soc_codec
*codec
= card
->codec
;
555 mutex_lock(&pcm_mutex
);
557 /* apply codec digital mute */
559 snd_soc_dai_digital_mute(codec_dai
, 1);
561 /* free any machine hw params */
562 if (machine
->ops
&& machine
->ops
->hw_free
)
563 machine
->ops
->hw_free(substream
);
565 /* free any DMA resources */
566 if (platform
->pcm_ops
->hw_free
)
567 platform
->pcm_ops
->hw_free(substream
);
569 /* now free hw params for the DAI's */
570 if (codec_dai
->ops
->hw_free
)
571 codec_dai
->ops
->hw_free(substream
, codec_dai
);
573 if (cpu_dai
->ops
->hw_free
)
574 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
576 mutex_unlock(&pcm_mutex
);
580 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
582 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
583 struct snd_soc_device
*socdev
= rtd
->socdev
;
584 struct snd_soc_card
*card
= socdev
->card
;
585 struct snd_soc_dai_link
*machine
= rtd
->dai
;
586 struct snd_soc_platform
*platform
= card
->platform
;
587 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
588 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
591 if (codec_dai
->ops
->trigger
) {
592 ret
= codec_dai
->ops
->trigger(substream
, cmd
, codec_dai
);
597 if (platform
->pcm_ops
->trigger
) {
598 ret
= platform
->pcm_ops
->trigger(substream
, cmd
);
603 if (cpu_dai
->ops
->trigger
) {
604 ret
= cpu_dai
->ops
->trigger(substream
, cmd
, cpu_dai
);
611 /* ASoC PCM operations */
612 static struct snd_pcm_ops soc_pcm_ops
= {
613 .open
= soc_pcm_open
,
614 .close
= soc_codec_close
,
615 .hw_params
= soc_pcm_hw_params
,
616 .hw_free
= soc_pcm_hw_free
,
617 .prepare
= soc_pcm_prepare
,
618 .trigger
= soc_pcm_trigger
,
622 /* powers down audio subsystem for suspend */
623 static int soc_suspend(struct device
*dev
)
625 struct platform_device
*pdev
= to_platform_device(dev
);
626 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
627 struct snd_soc_card
*card
= socdev
->card
;
628 struct snd_soc_platform
*platform
= card
->platform
;
629 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
630 struct snd_soc_codec
*codec
= card
->codec
;
633 /* If the initialization of this soc device failed, there is no codec
634 * associated with it. Just bail out in this case.
639 /* Due to the resume being scheduled into a workqueue we could
640 * suspend before that's finished - wait for it to complete.
642 snd_power_lock(codec
->card
);
643 snd_power_wait(codec
->card
, SNDRV_CTL_POWER_D0
);
644 snd_power_unlock(codec
->card
);
646 /* we're going to block userspace touching us until resume completes */
647 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D3hot
);
649 /* mute any active DAC's */
650 for (i
= 0; i
< card
->num_links
; i
++) {
651 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
652 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
653 dai
->ops
->digital_mute(dai
, 1);
656 /* suspend all pcms */
657 for (i
= 0; i
< card
->num_links
; i
++)
658 snd_pcm_suspend_all(card
->dai_link
[i
].pcm
);
660 if (card
->suspend_pre
)
661 card
->suspend_pre(pdev
, PMSG_SUSPEND
);
663 for (i
= 0; i
< card
->num_links
; i
++) {
664 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
665 if (cpu_dai
->suspend
&& !cpu_dai
->ac97_control
)
666 cpu_dai
->suspend(cpu_dai
);
667 if (platform
->suspend
)
668 platform
->suspend(cpu_dai
);
671 /* close any waiting streams and save state */
672 run_delayed_work(&card
->delayed_work
);
673 codec
->suspend_bias_level
= codec
->bias_level
;
675 for (i
= 0; i
< codec
->num_dai
; i
++) {
676 char *stream
= codec
->dai
[i
].playback
.stream_name
;
678 snd_soc_dapm_stream_event(codec
, stream
,
679 SND_SOC_DAPM_STREAM_SUSPEND
);
680 stream
= codec
->dai
[i
].capture
.stream_name
;
682 snd_soc_dapm_stream_event(codec
, stream
,
683 SND_SOC_DAPM_STREAM_SUSPEND
);
686 if (codec_dev
->suspend
)
687 codec_dev
->suspend(pdev
, PMSG_SUSPEND
);
689 for (i
= 0; i
< card
->num_links
; i
++) {
690 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
691 if (cpu_dai
->suspend
&& cpu_dai
->ac97_control
)
692 cpu_dai
->suspend(cpu_dai
);
695 if (card
->suspend_post
)
696 card
->suspend_post(pdev
, PMSG_SUSPEND
);
701 /* deferred resume work, so resume can complete before we finished
702 * setting our codec back up, which can be very slow on I2C
704 static void soc_resume_deferred(struct work_struct
*work
)
706 struct snd_soc_card
*card
= container_of(work
,
708 deferred_resume_work
);
709 struct snd_soc_device
*socdev
= card
->socdev
;
710 struct snd_soc_platform
*platform
= card
->platform
;
711 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
712 struct snd_soc_codec
*codec
= card
->codec
;
713 struct platform_device
*pdev
= to_platform_device(socdev
->dev
);
716 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
717 * so userspace apps are blocked from touching us
720 dev_dbg(socdev
->dev
, "starting resume work\n");
722 if (card
->resume_pre
)
723 card
->resume_pre(pdev
);
725 for (i
= 0; i
< card
->num_links
; i
++) {
726 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
727 if (cpu_dai
->resume
&& cpu_dai
->ac97_control
)
728 cpu_dai
->resume(cpu_dai
);
731 if (codec_dev
->resume
)
732 codec_dev
->resume(pdev
);
734 for (i
= 0; i
< codec
->num_dai
; i
++) {
735 char *stream
= codec
->dai
[i
].playback
.stream_name
;
737 snd_soc_dapm_stream_event(codec
, stream
,
738 SND_SOC_DAPM_STREAM_RESUME
);
739 stream
= codec
->dai
[i
].capture
.stream_name
;
741 snd_soc_dapm_stream_event(codec
, stream
,
742 SND_SOC_DAPM_STREAM_RESUME
);
745 /* unmute any active DACs */
746 for (i
= 0; i
< card
->num_links
; i
++) {
747 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
748 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
749 dai
->ops
->digital_mute(dai
, 0);
752 for (i
= 0; i
< card
->num_links
; i
++) {
753 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
754 if (cpu_dai
->resume
&& !cpu_dai
->ac97_control
)
755 cpu_dai
->resume(cpu_dai
);
756 if (platform
->resume
)
757 platform
->resume(cpu_dai
);
760 if (card
->resume_post
)
761 card
->resume_post(pdev
);
763 dev_dbg(socdev
->dev
, "resume work completed\n");
765 /* userspace can access us now we are back as we were before */
766 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D0
);
769 /* powers up audio subsystem after a suspend */
770 static int soc_resume(struct device
*dev
)
772 struct platform_device
*pdev
= to_platform_device(dev
);
773 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
774 struct snd_soc_card
*card
= socdev
->card
;
775 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[0].cpu_dai
;
777 /* AC97 devices might have other drivers hanging off them so
778 * need to resume immediately. Other drivers don't have that
779 * problem and may take a substantial amount of time to resume
780 * due to I/O costs and anti-pop so handle them out of line.
782 if (cpu_dai
->ac97_control
) {
783 dev_dbg(socdev
->dev
, "Resuming AC97 immediately\n");
784 soc_resume_deferred(&card
->deferred_resume_work
);
786 dev_dbg(socdev
->dev
, "Scheduling resume work\n");
787 if (!schedule_work(&card
->deferred_resume_work
))
788 dev_err(socdev
->dev
, "resume work item may be lost\n");
794 #define soc_suspend NULL
795 #define soc_resume NULL
798 static void snd_soc_instantiate_card(struct snd_soc_card
*card
)
800 struct platform_device
*pdev
= container_of(card
->dev
,
801 struct platform_device
,
803 struct snd_soc_codec_device
*codec_dev
= card
->socdev
->codec_dev
;
804 struct snd_soc_platform
*platform
;
805 struct snd_soc_dai
*dai
;
806 int i
, found
, ret
, ac97
;
808 if (card
->instantiated
)
812 list_for_each_entry(platform
, &platform_list
, list
)
813 if (card
->platform
== platform
) {
818 dev_dbg(card
->dev
, "Platform %s not registered\n",
819 card
->platform
->name
);
824 for (i
= 0; i
< card
->num_links
; i
++) {
826 list_for_each_entry(dai
, &dai_list
, list
)
827 if (card
->dai_link
[i
].cpu_dai
== dai
) {
832 dev_dbg(card
->dev
, "DAI %s not registered\n",
833 card
->dai_link
[i
].cpu_dai
->name
);
837 if (card
->dai_link
[i
].cpu_dai
->ac97_control
)
841 /* If we have AC97 in the system then don't wait for the
842 * codec. This will need revisiting if we have to handle
843 * systems with mixed AC97 and non-AC97 parts. Only check for
844 * DAIs currently; we can't do this per link since some AC97
845 * codecs have non-AC97 DAIs.
848 for (i
= 0; i
< card
->num_links
; i
++) {
850 list_for_each_entry(dai
, &dai_list
, list
)
851 if (card
->dai_link
[i
].codec_dai
== dai
) {
856 dev_dbg(card
->dev
, "DAI %s not registered\n",
857 card
->dai_link
[i
].codec_dai
->name
);
862 /* Note that we do not current check for codec components */
864 dev_dbg(card
->dev
, "All components present, instantiating\n");
866 /* Found everything, bring it up */
868 ret
= card
->probe(pdev
);
873 for (i
= 0; i
< card
->num_links
; i
++) {
874 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
875 if (cpu_dai
->probe
) {
876 ret
= cpu_dai
->probe(pdev
, cpu_dai
);
882 if (codec_dev
->probe
) {
883 ret
= codec_dev
->probe(pdev
);
888 if (platform
->probe
) {
889 ret
= platform
->probe(pdev
);
894 /* DAPM stream work */
895 INIT_DELAYED_WORK(&card
->delayed_work
, close_delayed_work
);
897 /* deferred resume work */
898 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
901 card
->instantiated
= 1;
906 if (codec_dev
->remove
)
907 codec_dev
->remove(pdev
);
910 for (i
--; i
>= 0; i
--) {
911 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
913 cpu_dai
->remove(pdev
, cpu_dai
);
921 * Attempt to initialise any uninitalised cards. Must be called with
924 static void snd_soc_instantiate_cards(void)
926 struct snd_soc_card
*card
;
927 list_for_each_entry(card
, &card_list
, list
)
928 snd_soc_instantiate_card(card
);
931 /* probes a new socdev */
932 static int soc_probe(struct platform_device
*pdev
)
935 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
936 struct snd_soc_card
*card
= socdev
->card
;
938 /* Bodge while we push things out of socdev */
939 card
->socdev
= socdev
;
941 /* Bodge while we unpick instantiation */
942 card
->dev
= &pdev
->dev
;
943 ret
= snd_soc_register_card(card
);
945 dev_err(&pdev
->dev
, "Failed to register card\n");
952 /* removes a socdev */
953 static int soc_remove(struct platform_device
*pdev
)
956 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
957 struct snd_soc_card
*card
= socdev
->card
;
958 struct snd_soc_platform
*platform
= card
->platform
;
959 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
961 if (!card
->instantiated
)
964 run_delayed_work(&card
->delayed_work
);
966 if (platform
->remove
)
967 platform
->remove(pdev
);
969 if (codec_dev
->remove
)
970 codec_dev
->remove(pdev
);
972 for (i
= 0; i
< card
->num_links
; i
++) {
973 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
975 cpu_dai
->remove(pdev
, cpu_dai
);
981 snd_soc_unregister_card(card
);
986 static int soc_poweroff(struct device
*dev
)
988 struct platform_device
*pdev
= to_platform_device(dev
);
989 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
990 struct snd_soc_card
*card
= socdev
->card
;
992 if (!card
->instantiated
)
995 /* Flush out pmdown_time work - we actually do want to run it
996 * now, we're shutting down so no imminent restart. */
997 run_delayed_work(&card
->delayed_work
);
999 snd_soc_dapm_shutdown(socdev
);
1004 static struct dev_pm_ops soc_pm_ops
= {
1005 .suspend
= soc_suspend
,
1006 .resume
= soc_resume
,
1007 .poweroff
= soc_poweroff
,
1010 /* ASoC platform driver */
1011 static struct platform_driver soc_driver
= {
1013 .name
= "soc-audio",
1014 .owner
= THIS_MODULE
,
1018 .remove
= soc_remove
,
1021 /* create a new pcm */
1022 static int soc_new_pcm(struct snd_soc_device
*socdev
,
1023 struct snd_soc_dai_link
*dai_link
, int num
)
1025 struct snd_soc_card
*card
= socdev
->card
;
1026 struct snd_soc_codec
*codec
= card
->codec
;
1027 struct snd_soc_platform
*platform
= card
->platform
;
1028 struct snd_soc_dai
*codec_dai
= dai_link
->codec_dai
;
1029 struct snd_soc_dai
*cpu_dai
= dai_link
->cpu_dai
;
1030 struct snd_soc_pcm_runtime
*rtd
;
1031 struct snd_pcm
*pcm
;
1033 int ret
= 0, playback
= 0, capture
= 0;
1035 rtd
= kzalloc(sizeof(struct snd_soc_pcm_runtime
), GFP_KERNEL
);
1039 rtd
->dai
= dai_link
;
1040 rtd
->socdev
= socdev
;
1041 codec_dai
->codec
= card
->codec
;
1043 /* check client and interface hw capabilities */
1044 sprintf(new_name
, "%s %s-%d", dai_link
->stream_name
, codec_dai
->name
,
1047 if (codec_dai
->playback
.channels_min
)
1049 if (codec_dai
->capture
.channels_min
)
1052 ret
= snd_pcm_new(codec
->card
, new_name
, codec
->pcm_devs
++, playback
,
1055 printk(KERN_ERR
"asoc: can't create pcm for codec %s\n",
1061 dai_link
->pcm
= pcm
;
1062 pcm
->private_data
= rtd
;
1063 soc_pcm_ops
.mmap
= platform
->pcm_ops
->mmap
;
1064 soc_pcm_ops
.pointer
= platform
->pcm_ops
->pointer
;
1065 soc_pcm_ops
.ioctl
= platform
->pcm_ops
->ioctl
;
1066 soc_pcm_ops
.copy
= platform
->pcm_ops
->copy
;
1067 soc_pcm_ops
.silence
= platform
->pcm_ops
->silence
;
1068 soc_pcm_ops
.ack
= platform
->pcm_ops
->ack
;
1069 soc_pcm_ops
.page
= platform
->pcm_ops
->page
;
1072 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &soc_pcm_ops
);
1075 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &soc_pcm_ops
);
1077 ret
= platform
->pcm_new(codec
->card
, codec_dai
, pcm
);
1079 printk(KERN_ERR
"asoc: platform pcm constructor failed\n");
1084 pcm
->private_free
= platform
->pcm_free
;
1085 printk(KERN_INFO
"asoc: %s <-> %s mapping ok\n", codec_dai
->name
,
1091 * snd_soc_codec_volatile_register: Report if a register is volatile.
1093 * @codec: CODEC to query.
1094 * @reg: Register to query.
1096 * Boolean function indiciating if a CODEC register is volatile.
1098 int snd_soc_codec_volatile_register(struct snd_soc_codec
*codec
, int reg
)
1100 if (codec
->volatile_register
)
1101 return codec
->volatile_register(reg
);
1105 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register
);
1107 /* codec register dump */
1108 static ssize_t
soc_codec_reg_show(struct snd_soc_codec
*codec
, char *buf
)
1110 int i
, step
= 1, count
= 0;
1112 if (!codec
->reg_cache_size
)
1115 if (codec
->reg_cache_step
)
1116 step
= codec
->reg_cache_step
;
1118 count
+= sprintf(buf
, "%s registers\n", codec
->name
);
1119 for (i
= 0; i
< codec
->reg_cache_size
; i
+= step
) {
1120 if (codec
->readable_register
&& !codec
->readable_register(i
))
1123 count
+= sprintf(buf
+ count
, "%2x: ", i
);
1124 if (count
>= PAGE_SIZE
- 1)
1127 if (codec
->display_register
)
1128 count
+= codec
->display_register(codec
, buf
+ count
,
1129 PAGE_SIZE
- count
, i
);
1131 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
,
1132 "%4x", codec
->read(codec
, i
));
1134 if (count
>= PAGE_SIZE
- 1)
1137 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
, "\n");
1138 if (count
>= PAGE_SIZE
- 1)
1142 /* Truncate count; min() would cause a warning */
1143 if (count
>= PAGE_SIZE
)
1144 count
= PAGE_SIZE
- 1;
1148 static ssize_t
codec_reg_show(struct device
*dev
,
1149 struct device_attribute
*attr
, char *buf
)
1151 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
1152 return soc_codec_reg_show(devdata
->card
->codec
, buf
);
1155 static DEVICE_ATTR(codec_reg
, 0444, codec_reg_show
, NULL
);
1157 #ifdef CONFIG_DEBUG_FS
1158 static int codec_reg_open_file(struct inode
*inode
, struct file
*file
)
1160 file
->private_data
= inode
->i_private
;
1164 static ssize_t
codec_reg_read_file(struct file
*file
, char __user
*user_buf
,
1165 size_t count
, loff_t
*ppos
)
1168 struct snd_soc_codec
*codec
= file
->private_data
;
1169 char *buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1172 ret
= soc_codec_reg_show(codec
, buf
);
1174 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1179 static ssize_t
codec_reg_write_file(struct file
*file
,
1180 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
1185 unsigned long reg
, value
;
1187 struct snd_soc_codec
*codec
= file
->private_data
;
1189 buf_size
= min(count
, (sizeof(buf
)-1));
1190 if (copy_from_user(buf
, user_buf
, buf_size
))
1194 if (codec
->reg_cache_step
)
1195 step
= codec
->reg_cache_step
;
1197 while (*start
== ' ')
1199 reg
= simple_strtoul(start
, &start
, 16);
1200 if ((reg
>= codec
->reg_cache_size
) || (reg
% step
))
1202 while (*start
== ' ')
1204 if (strict_strtoul(start
, 16, &value
))
1206 codec
->write(codec
, reg
, value
);
1210 static const struct file_operations codec_reg_fops
= {
1211 .open
= codec_reg_open_file
,
1212 .read
= codec_reg_read_file
,
1213 .write
= codec_reg_write_file
,
1216 static void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
1218 char codec_root
[128];
1221 snprintf(codec_root
, sizeof(codec_root
),
1222 "%s.%s", codec
->name
, dev_name(codec
->dev
));
1224 snprintf(codec_root
, sizeof(codec_root
),
1227 codec
->debugfs_codec_root
= debugfs_create_dir(codec_root
,
1229 if (!codec
->debugfs_codec_root
) {
1231 "ASoC: Failed to create codec debugfs directory\n");
1235 codec
->debugfs_reg
= debugfs_create_file("codec_reg", 0644,
1236 codec
->debugfs_codec_root
,
1237 codec
, &codec_reg_fops
);
1238 if (!codec
->debugfs_reg
)
1240 "ASoC: Failed to create codec register debugfs file\n");
1242 codec
->debugfs_pop_time
= debugfs_create_u32("dapm_pop_time", 0744,
1243 codec
->debugfs_codec_root
,
1245 if (!codec
->debugfs_pop_time
)
1247 "Failed to create pop time debugfs file\n");
1249 codec
->debugfs_dapm
= debugfs_create_dir("dapm",
1250 codec
->debugfs_codec_root
);
1251 if (!codec
->debugfs_dapm
)
1253 "Failed to create DAPM debugfs directory\n");
1255 snd_soc_dapm_debugfs_init(codec
);
1258 static void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
1260 debugfs_remove_recursive(codec
->debugfs_codec_root
);
1265 static inline void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
1269 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
1275 * snd_soc_new_ac97_codec - initailise AC97 device
1276 * @codec: audio codec
1277 * @ops: AC97 bus operations
1278 * @num: AC97 codec number
1280 * Initialises AC97 codec resources for use by ad-hoc devices only.
1282 int snd_soc_new_ac97_codec(struct snd_soc_codec
*codec
,
1283 struct snd_ac97_bus_ops
*ops
, int num
)
1285 mutex_lock(&codec
->mutex
);
1287 codec
->ac97
= kzalloc(sizeof(struct snd_ac97
), GFP_KERNEL
);
1288 if (codec
->ac97
== NULL
) {
1289 mutex_unlock(&codec
->mutex
);
1293 codec
->ac97
->bus
= kzalloc(sizeof(struct snd_ac97_bus
), GFP_KERNEL
);
1294 if (codec
->ac97
->bus
== NULL
) {
1297 mutex_unlock(&codec
->mutex
);
1301 codec
->ac97
->bus
->ops
= ops
;
1302 codec
->ac97
->num
= num
;
1303 mutex_unlock(&codec
->mutex
);
1306 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec
);
1309 * snd_soc_free_ac97_codec - free AC97 codec device
1310 * @codec: audio codec
1312 * Frees AC97 codec device resources.
1314 void snd_soc_free_ac97_codec(struct snd_soc_codec
*codec
)
1316 mutex_lock(&codec
->mutex
);
1317 kfree(codec
->ac97
->bus
);
1320 mutex_unlock(&codec
->mutex
);
1322 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec
);
1325 * snd_soc_update_bits - update codec register bits
1326 * @codec: audio codec
1327 * @reg: codec register
1328 * @mask: register mask
1331 * Writes new register value.
1333 * Returns 1 for change else 0.
1335 int snd_soc_update_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1336 unsigned int mask
, unsigned int value
)
1339 unsigned int old
, new;
1341 mutex_lock(&io_mutex
);
1342 old
= snd_soc_read(codec
, reg
);
1343 new = (old
& ~mask
) | value
;
1344 change
= old
!= new;
1346 snd_soc_write(codec
, reg
, new);
1348 mutex_unlock(&io_mutex
);
1351 EXPORT_SYMBOL_GPL(snd_soc_update_bits
);
1354 * snd_soc_test_bits - test register for change
1355 * @codec: audio codec
1356 * @reg: codec register
1357 * @mask: register mask
1360 * Tests a register with a new value and checks if the new value is
1361 * different from the old value.
1363 * Returns 1 for change else 0.
1365 int snd_soc_test_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1366 unsigned int mask
, unsigned int value
)
1369 unsigned int old
, new;
1371 mutex_lock(&io_mutex
);
1372 old
= snd_soc_read(codec
, reg
);
1373 new = (old
& ~mask
) | value
;
1374 change
= old
!= new;
1375 mutex_unlock(&io_mutex
);
1379 EXPORT_SYMBOL_GPL(snd_soc_test_bits
);
1382 * snd_soc_new_pcms - create new sound card and pcms
1383 * @socdev: the SoC audio device
1384 * @idx: ALSA card index
1385 * @xid: card identification
1387 * Create a new sound card based upon the codec and interface pcms.
1389 * Returns 0 for success, else error.
1391 int snd_soc_new_pcms(struct snd_soc_device
*socdev
, int idx
, const char *xid
)
1393 struct snd_soc_card
*card
= socdev
->card
;
1394 struct snd_soc_codec
*codec
= card
->codec
;
1397 mutex_lock(&codec
->mutex
);
1399 /* register a sound card */
1400 ret
= snd_card_create(idx
, xid
, codec
->owner
, 0, &codec
->card
);
1402 printk(KERN_ERR
"asoc: can't create sound card for codec %s\n",
1404 mutex_unlock(&codec
->mutex
);
1408 codec
->socdev
= socdev
;
1409 codec
->card
->dev
= socdev
->dev
;
1410 codec
->card
->private_data
= codec
;
1411 strncpy(codec
->card
->driver
, codec
->name
, sizeof(codec
->card
->driver
));
1413 /* create the pcms */
1414 for (i
= 0; i
< card
->num_links
; i
++) {
1415 ret
= soc_new_pcm(socdev
, &card
->dai_link
[i
], i
);
1417 printk(KERN_ERR
"asoc: can't create pcm %s\n",
1418 card
->dai_link
[i
].stream_name
);
1419 mutex_unlock(&codec
->mutex
);
1424 mutex_unlock(&codec
->mutex
);
1427 EXPORT_SYMBOL_GPL(snd_soc_new_pcms
);
1430 * snd_soc_init_card - register sound card
1431 * @socdev: the SoC audio device
1433 * Register a SoC sound card. Also registers an AC97 device if the
1434 * codec is AC97 for ad hoc devices.
1436 * Returns 0 for success, else error.
1438 int snd_soc_init_card(struct snd_soc_device
*socdev
)
1440 struct snd_soc_card
*card
= socdev
->card
;
1441 struct snd_soc_codec
*codec
= card
->codec
;
1442 int ret
= 0, i
, ac97
= 0, err
= 0;
1444 for (i
= 0; i
< card
->num_links
; i
++) {
1445 if (card
->dai_link
[i
].init
) {
1446 err
= card
->dai_link
[i
].init(codec
);
1448 printk(KERN_ERR
"asoc: failed to init %s\n",
1449 card
->dai_link
[i
].stream_name
);
1453 if (card
->dai_link
[i
].codec_dai
->ac97_control
) {
1455 snd_ac97_dev_add_pdata(codec
->ac97
,
1456 card
->dai_link
[i
].cpu_dai
->ac97_pdata
);
1459 snprintf(codec
->card
->shortname
, sizeof(codec
->card
->shortname
),
1461 snprintf(codec
->card
->longname
, sizeof(codec
->card
->longname
),
1462 "%s (%s)", card
->name
, codec
->name
);
1464 /* Make sure all DAPM widgets are instantiated */
1465 snd_soc_dapm_new_widgets(codec
);
1467 ret
= snd_card_register(codec
->card
);
1469 printk(KERN_ERR
"asoc: failed to register soundcard for %s\n",
1474 mutex_lock(&codec
->mutex
);
1475 #ifdef CONFIG_SND_SOC_AC97_BUS
1476 /* Only instantiate AC97 if not already done by the adaptor
1477 * for the generic AC97 subsystem.
1479 if (ac97
&& strcmp(codec
->name
, "AC97") != 0) {
1480 ret
= soc_ac97_dev_register(codec
);
1482 printk(KERN_ERR
"asoc: AC97 device register failed\n");
1483 snd_card_free(codec
->card
);
1484 mutex_unlock(&codec
->mutex
);
1490 err
= snd_soc_dapm_sys_add(socdev
->dev
);
1492 printk(KERN_WARNING
"asoc: failed to add dapm sysfs entries\n");
1494 err
= device_create_file(socdev
->dev
, &dev_attr_codec_reg
);
1496 printk(KERN_WARNING
"asoc: failed to add codec sysfs files\n");
1498 soc_init_codec_debugfs(codec
);
1499 mutex_unlock(&codec
->mutex
);
1504 EXPORT_SYMBOL_GPL(snd_soc_init_card
);
1507 * snd_soc_free_pcms - free sound card and pcms
1508 * @socdev: the SoC audio device
1510 * Frees sound card and pcms associated with the socdev.
1511 * Also unregister the codec if it is an AC97 device.
1513 void snd_soc_free_pcms(struct snd_soc_device
*socdev
)
1515 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1516 #ifdef CONFIG_SND_SOC_AC97_BUS
1517 struct snd_soc_dai
*codec_dai
;
1521 mutex_lock(&codec
->mutex
);
1522 soc_cleanup_codec_debugfs(codec
);
1523 #ifdef CONFIG_SND_SOC_AC97_BUS
1524 for (i
= 0; i
< codec
->num_dai
; i
++) {
1525 codec_dai
= &codec
->dai
[i
];
1526 if (codec_dai
->ac97_control
&& codec
->ac97
&&
1527 strcmp(codec
->name
, "AC97") != 0) {
1528 soc_ac97_dev_unregister(codec
);
1536 snd_card_free(codec
->card
);
1537 device_remove_file(socdev
->dev
, &dev_attr_codec_reg
);
1538 mutex_unlock(&codec
->mutex
);
1540 EXPORT_SYMBOL_GPL(snd_soc_free_pcms
);
1543 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1544 * @substream: the pcm substream
1545 * @hw: the hardware parameters
1547 * Sets the substream runtime hardware parameters.
1549 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
1550 const struct snd_pcm_hardware
*hw
)
1552 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1553 runtime
->hw
.info
= hw
->info
;
1554 runtime
->hw
.formats
= hw
->formats
;
1555 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
1556 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
1557 runtime
->hw
.periods_min
= hw
->periods_min
;
1558 runtime
->hw
.periods_max
= hw
->periods_max
;
1559 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
1560 runtime
->hw
.fifo_size
= hw
->fifo_size
;
1563 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
1566 * snd_soc_cnew - create new control
1567 * @_template: control template
1568 * @data: control private data
1569 * @long_name: control long name
1571 * Create a new mixer control from a template control.
1573 * Returns 0 for success, else error.
1575 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
1576 void *data
, char *long_name
)
1578 struct snd_kcontrol_new
template;
1580 memcpy(&template, _template
, sizeof(template));
1582 template.name
= long_name
;
1585 return snd_ctl_new1(&template, data
);
1587 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
1590 * snd_soc_add_controls - add an array of controls to a codec.
1591 * Convienience function to add a list of controls. Many codecs were
1592 * duplicating this code.
1594 * @codec: codec to add controls to
1595 * @controls: array of controls to add
1596 * @num_controls: number of elements in the array
1598 * Return 0 for success, else error.
1600 int snd_soc_add_controls(struct snd_soc_codec
*codec
,
1601 const struct snd_kcontrol_new
*controls
, int num_controls
)
1603 struct snd_card
*card
= codec
->card
;
1606 for (i
= 0; i
< num_controls
; i
++) {
1607 const struct snd_kcontrol_new
*control
= &controls
[i
];
1608 err
= snd_ctl_add(card
, snd_soc_cnew(control
, codec
, NULL
));
1610 dev_err(codec
->dev
, "%s: Failed to add %s\n",
1611 codec
->name
, control
->name
);
1618 EXPORT_SYMBOL_GPL(snd_soc_add_controls
);
1621 * snd_soc_info_enum_double - enumerated double mixer info callback
1622 * @kcontrol: mixer control
1623 * @uinfo: control element information
1625 * Callback to provide information about a double enumerated
1628 * Returns 0 for success.
1630 int snd_soc_info_enum_double(struct snd_kcontrol
*kcontrol
,
1631 struct snd_ctl_elem_info
*uinfo
)
1633 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1635 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1636 uinfo
->count
= e
->shift_l
== e
->shift_r
? 1 : 2;
1637 uinfo
->value
.enumerated
.items
= e
->max
;
1639 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1640 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1641 strcpy(uinfo
->value
.enumerated
.name
,
1642 e
->texts
[uinfo
->value
.enumerated
.item
]);
1645 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double
);
1648 * snd_soc_get_enum_double - enumerated double mixer get callback
1649 * @kcontrol: mixer control
1650 * @ucontrol: control element information
1652 * Callback to get the value of a double enumerated mixer.
1654 * Returns 0 for success.
1656 int snd_soc_get_enum_double(struct snd_kcontrol
*kcontrol
,
1657 struct snd_ctl_elem_value
*ucontrol
)
1659 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1660 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1661 unsigned int val
, bitmask
;
1663 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1665 val
= snd_soc_read(codec
, e
->reg
);
1666 ucontrol
->value
.enumerated
.item
[0]
1667 = (val
>> e
->shift_l
) & (bitmask
- 1);
1668 if (e
->shift_l
!= e
->shift_r
)
1669 ucontrol
->value
.enumerated
.item
[1] =
1670 (val
>> e
->shift_r
) & (bitmask
- 1);
1674 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double
);
1677 * snd_soc_put_enum_double - enumerated double mixer put callback
1678 * @kcontrol: mixer control
1679 * @ucontrol: control element information
1681 * Callback to set the value of a double enumerated mixer.
1683 * Returns 0 for success.
1685 int snd_soc_put_enum_double(struct snd_kcontrol
*kcontrol
,
1686 struct snd_ctl_elem_value
*ucontrol
)
1688 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1689 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1691 unsigned int mask
, bitmask
;
1693 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1695 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1697 val
= ucontrol
->value
.enumerated
.item
[0] << e
->shift_l
;
1698 mask
= (bitmask
- 1) << e
->shift_l
;
1699 if (e
->shift_l
!= e
->shift_r
) {
1700 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1702 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1703 mask
|= (bitmask
- 1) << e
->shift_r
;
1706 return snd_soc_update_bits(codec
, e
->reg
, mask
, val
);
1708 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double
);
1711 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1712 * @kcontrol: mixer control
1713 * @ucontrol: control element information
1715 * Callback to get the value of a double semi enumerated mixer.
1717 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1718 * used for handling bitfield coded enumeration for example.
1720 * Returns 0 for success.
1722 int snd_soc_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1723 struct snd_ctl_elem_value
*ucontrol
)
1725 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1726 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1727 unsigned int reg_val
, val
, mux
;
1729 reg_val
= snd_soc_read(codec
, e
->reg
);
1730 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1731 for (mux
= 0; mux
< e
->max
; mux
++) {
1732 if (val
== e
->values
[mux
])
1735 ucontrol
->value
.enumerated
.item
[0] = mux
;
1736 if (e
->shift_l
!= e
->shift_r
) {
1737 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1738 for (mux
= 0; mux
< e
->max
; mux
++) {
1739 if (val
== e
->values
[mux
])
1742 ucontrol
->value
.enumerated
.item
[1] = mux
;
1747 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double
);
1750 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1751 * @kcontrol: mixer control
1752 * @ucontrol: control element information
1754 * Callback to set the value of a double semi enumerated mixer.
1756 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1757 * used for handling bitfield coded enumeration for example.
1759 * Returns 0 for success.
1761 int snd_soc_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1762 struct snd_ctl_elem_value
*ucontrol
)
1764 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1765 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1769 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1771 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1772 mask
= e
->mask
<< e
->shift_l
;
1773 if (e
->shift_l
!= e
->shift_r
) {
1774 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1776 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1777 mask
|= e
->mask
<< e
->shift_r
;
1780 return snd_soc_update_bits(codec
, e
->reg
, mask
, val
);
1782 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double
);
1785 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1786 * @kcontrol: mixer control
1787 * @uinfo: control element information
1789 * Callback to provide information about an external enumerated
1792 * Returns 0 for success.
1794 int snd_soc_info_enum_ext(struct snd_kcontrol
*kcontrol
,
1795 struct snd_ctl_elem_info
*uinfo
)
1797 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1799 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1801 uinfo
->value
.enumerated
.items
= e
->max
;
1803 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1804 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1805 strcpy(uinfo
->value
.enumerated
.name
,
1806 e
->texts
[uinfo
->value
.enumerated
.item
]);
1809 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext
);
1812 * snd_soc_info_volsw_ext - external single mixer info callback
1813 * @kcontrol: mixer control
1814 * @uinfo: control element information
1816 * Callback to provide information about a single external mixer control.
1818 * Returns 0 for success.
1820 int snd_soc_info_volsw_ext(struct snd_kcontrol
*kcontrol
,
1821 struct snd_ctl_elem_info
*uinfo
)
1823 int max
= kcontrol
->private_value
;
1825 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1826 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1828 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1831 uinfo
->value
.integer
.min
= 0;
1832 uinfo
->value
.integer
.max
= max
;
1835 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext
);
1838 * snd_soc_info_volsw - single mixer info callback
1839 * @kcontrol: mixer control
1840 * @uinfo: control element information
1842 * Callback to provide information about a single mixer control.
1844 * Returns 0 for success.
1846 int snd_soc_info_volsw(struct snd_kcontrol
*kcontrol
,
1847 struct snd_ctl_elem_info
*uinfo
)
1849 struct soc_mixer_control
*mc
=
1850 (struct soc_mixer_control
*)kcontrol
->private_value
;
1852 unsigned int shift
= mc
->shift
;
1853 unsigned int rshift
= mc
->rshift
;
1855 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1856 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1858 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1860 uinfo
->count
= shift
== rshift
? 1 : 2;
1861 uinfo
->value
.integer
.min
= 0;
1862 uinfo
->value
.integer
.max
= max
;
1865 EXPORT_SYMBOL_GPL(snd_soc_info_volsw
);
1868 * snd_soc_get_volsw - single mixer get callback
1869 * @kcontrol: mixer control
1870 * @ucontrol: control element information
1872 * Callback to get the value of a single mixer control.
1874 * Returns 0 for success.
1876 int snd_soc_get_volsw(struct snd_kcontrol
*kcontrol
,
1877 struct snd_ctl_elem_value
*ucontrol
)
1879 struct soc_mixer_control
*mc
=
1880 (struct soc_mixer_control
*)kcontrol
->private_value
;
1881 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1882 unsigned int reg
= mc
->reg
;
1883 unsigned int shift
= mc
->shift
;
1884 unsigned int rshift
= mc
->rshift
;
1886 unsigned int mask
= (1 << fls(max
)) - 1;
1887 unsigned int invert
= mc
->invert
;
1889 ucontrol
->value
.integer
.value
[0] =
1890 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1891 if (shift
!= rshift
)
1892 ucontrol
->value
.integer
.value
[1] =
1893 (snd_soc_read(codec
, reg
) >> rshift
) & mask
;
1895 ucontrol
->value
.integer
.value
[0] =
1896 max
- ucontrol
->value
.integer
.value
[0];
1897 if (shift
!= rshift
)
1898 ucontrol
->value
.integer
.value
[1] =
1899 max
- ucontrol
->value
.integer
.value
[1];
1904 EXPORT_SYMBOL_GPL(snd_soc_get_volsw
);
1907 * snd_soc_put_volsw - single mixer put callback
1908 * @kcontrol: mixer control
1909 * @ucontrol: control element information
1911 * Callback to set the value of a single mixer control.
1913 * Returns 0 for success.
1915 int snd_soc_put_volsw(struct snd_kcontrol
*kcontrol
,
1916 struct snd_ctl_elem_value
*ucontrol
)
1918 struct soc_mixer_control
*mc
=
1919 (struct soc_mixer_control
*)kcontrol
->private_value
;
1920 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1921 unsigned int reg
= mc
->reg
;
1922 unsigned int shift
= mc
->shift
;
1923 unsigned int rshift
= mc
->rshift
;
1925 unsigned int mask
= (1 << fls(max
)) - 1;
1926 unsigned int invert
= mc
->invert
;
1927 unsigned int val
, val2
, val_mask
;
1929 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1932 val_mask
= mask
<< shift
;
1934 if (shift
!= rshift
) {
1935 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1938 val_mask
|= mask
<< rshift
;
1939 val
|= val2
<< rshift
;
1941 return snd_soc_update_bits(codec
, reg
, val_mask
, val
);
1943 EXPORT_SYMBOL_GPL(snd_soc_put_volsw
);
1946 * snd_soc_info_volsw_2r - double mixer info callback
1947 * @kcontrol: mixer control
1948 * @uinfo: control element information
1950 * Callback to provide information about a double mixer control that
1951 * spans 2 codec registers.
1953 * Returns 0 for success.
1955 int snd_soc_info_volsw_2r(struct snd_kcontrol
*kcontrol
,
1956 struct snd_ctl_elem_info
*uinfo
)
1958 struct soc_mixer_control
*mc
=
1959 (struct soc_mixer_control
*)kcontrol
->private_value
;
1962 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1963 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1965 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1968 uinfo
->value
.integer
.min
= 0;
1969 uinfo
->value
.integer
.max
= max
;
1972 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r
);
1975 * snd_soc_get_volsw_2r - double mixer get callback
1976 * @kcontrol: mixer control
1977 * @ucontrol: control element information
1979 * Callback to get the value of a double mixer control that spans 2 registers.
1981 * Returns 0 for success.
1983 int snd_soc_get_volsw_2r(struct snd_kcontrol
*kcontrol
,
1984 struct snd_ctl_elem_value
*ucontrol
)
1986 struct soc_mixer_control
*mc
=
1987 (struct soc_mixer_control
*)kcontrol
->private_value
;
1988 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1989 unsigned int reg
= mc
->reg
;
1990 unsigned int reg2
= mc
->rreg
;
1991 unsigned int shift
= mc
->shift
;
1993 unsigned int mask
= (1 << fls(max
)) - 1;
1994 unsigned int invert
= mc
->invert
;
1996 ucontrol
->value
.integer
.value
[0] =
1997 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1998 ucontrol
->value
.integer
.value
[1] =
1999 (snd_soc_read(codec
, reg2
) >> shift
) & mask
;
2001 ucontrol
->value
.integer
.value
[0] =
2002 max
- ucontrol
->value
.integer
.value
[0];
2003 ucontrol
->value
.integer
.value
[1] =
2004 max
- ucontrol
->value
.integer
.value
[1];
2009 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r
);
2012 * snd_soc_put_volsw_2r - double mixer set callback
2013 * @kcontrol: mixer control
2014 * @ucontrol: control element information
2016 * Callback to set the value of a double mixer control that spans 2 registers.
2018 * Returns 0 for success.
2020 int snd_soc_put_volsw_2r(struct snd_kcontrol
*kcontrol
,
2021 struct snd_ctl_elem_value
*ucontrol
)
2023 struct soc_mixer_control
*mc
=
2024 (struct soc_mixer_control
*)kcontrol
->private_value
;
2025 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2026 unsigned int reg
= mc
->reg
;
2027 unsigned int reg2
= mc
->rreg
;
2028 unsigned int shift
= mc
->shift
;
2030 unsigned int mask
= (1 << fls(max
)) - 1;
2031 unsigned int invert
= mc
->invert
;
2033 unsigned int val
, val2
, val_mask
;
2035 val_mask
= mask
<< shift
;
2036 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2037 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
2045 val2
= val2
<< shift
;
2047 err
= snd_soc_update_bits(codec
, reg
, val_mask
, val
);
2051 err
= snd_soc_update_bits(codec
, reg2
, val_mask
, val2
);
2054 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r
);
2057 * snd_soc_info_volsw_s8 - signed mixer info callback
2058 * @kcontrol: mixer control
2059 * @uinfo: control element information
2061 * Callback to provide information about a signed mixer control.
2063 * Returns 0 for success.
2065 int snd_soc_info_volsw_s8(struct snd_kcontrol
*kcontrol
,
2066 struct snd_ctl_elem_info
*uinfo
)
2068 struct soc_mixer_control
*mc
=
2069 (struct soc_mixer_control
*)kcontrol
->private_value
;
2073 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2075 uinfo
->value
.integer
.min
= 0;
2076 uinfo
->value
.integer
.max
= max
-min
;
2079 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8
);
2082 * snd_soc_get_volsw_s8 - signed mixer get callback
2083 * @kcontrol: mixer control
2084 * @ucontrol: control element information
2086 * Callback to get the value of a signed mixer control.
2088 * Returns 0 for success.
2090 int snd_soc_get_volsw_s8(struct snd_kcontrol
*kcontrol
,
2091 struct snd_ctl_elem_value
*ucontrol
)
2093 struct soc_mixer_control
*mc
=
2094 (struct soc_mixer_control
*)kcontrol
->private_value
;
2095 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2096 unsigned int reg
= mc
->reg
;
2098 int val
= snd_soc_read(codec
, reg
);
2100 ucontrol
->value
.integer
.value
[0] =
2101 ((signed char)(val
& 0xff))-min
;
2102 ucontrol
->value
.integer
.value
[1] =
2103 ((signed char)((val
>> 8) & 0xff))-min
;
2106 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8
);
2109 * snd_soc_put_volsw_sgn - signed mixer put callback
2110 * @kcontrol: mixer control
2111 * @ucontrol: control element information
2113 * Callback to set the value of a signed mixer control.
2115 * Returns 0 for success.
2117 int snd_soc_put_volsw_s8(struct snd_kcontrol
*kcontrol
,
2118 struct snd_ctl_elem_value
*ucontrol
)
2120 struct soc_mixer_control
*mc
=
2121 (struct soc_mixer_control
*)kcontrol
->private_value
;
2122 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2123 unsigned int reg
= mc
->reg
;
2127 val
= (ucontrol
->value
.integer
.value
[0]+min
) & 0xff;
2128 val
|= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff) << 8;
2130 return snd_soc_update_bits(codec
, reg
, 0xffff, val
);
2132 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8
);
2135 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2137 * @clk_id: DAI specific clock ID
2138 * @freq: new clock frequency in Hz
2139 * @dir: new clock direction - input/output.
2141 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2143 int snd_soc_dai_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
2144 unsigned int freq
, int dir
)
2146 if (dai
->ops
&& dai
->ops
->set_sysclk
)
2147 return dai
->ops
->set_sysclk(dai
, clk_id
, freq
, dir
);
2151 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk
);
2154 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2156 * @div_id: DAI specific clock divider ID
2157 * @div: new clock divisor.
2159 * Configures the clock dividers. This is used to derive the best DAI bit and
2160 * frame clocks from the system or master clock. It's best to set the DAI bit
2161 * and frame clocks as low as possible to save system power.
2163 int snd_soc_dai_set_clkdiv(struct snd_soc_dai
*dai
,
2164 int div_id
, int div
)
2166 if (dai
->ops
&& dai
->ops
->set_clkdiv
)
2167 return dai
->ops
->set_clkdiv(dai
, div_id
, div
);
2171 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv
);
2174 * snd_soc_dai_set_pll - configure DAI PLL.
2176 * @pll_id: DAI specific PLL ID
2177 * @source: DAI specific source for the PLL
2178 * @freq_in: PLL input clock frequency in Hz
2179 * @freq_out: requested PLL output clock frequency in Hz
2181 * Configures and enables PLL to generate output clock based on input clock.
2183 int snd_soc_dai_set_pll(struct snd_soc_dai
*dai
, int pll_id
, int source
,
2184 unsigned int freq_in
, unsigned int freq_out
)
2186 if (dai
->ops
&& dai
->ops
->set_pll
)
2187 return dai
->ops
->set_pll(dai
, pll_id
, source
,
2192 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll
);
2195 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2197 * @fmt: SND_SOC_DAIFMT_ format value.
2199 * Configures the DAI hardware format and clocking.
2201 int snd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
2203 if (dai
->ops
&& dai
->ops
->set_fmt
)
2204 return dai
->ops
->set_fmt(dai
, fmt
);
2208 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt
);
2211 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2213 * @tx_mask: bitmask representing active TX slots.
2214 * @rx_mask: bitmask representing active RX slots.
2215 * @slots: Number of slots in use.
2216 * @slot_width: Width in bits for each slot.
2218 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2221 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai
*dai
,
2222 unsigned int tx_mask
, unsigned int rx_mask
, int slots
, int slot_width
)
2224 if (dai
->ops
&& dai
->ops
->set_tdm_slot
)
2225 return dai
->ops
->set_tdm_slot(dai
, tx_mask
, rx_mask
,
2230 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot
);
2233 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2235 * @tx_num: how many TX channels
2236 * @tx_slot: pointer to an array which imply the TX slot number channel
2238 * @rx_num: how many RX channels
2239 * @rx_slot: pointer to an array which imply the RX slot number channel
2242 * configure the relationship between channel number and TDM slot number.
2244 int snd_soc_dai_set_channel_map(struct snd_soc_dai
*dai
,
2245 unsigned int tx_num
, unsigned int *tx_slot
,
2246 unsigned int rx_num
, unsigned int *rx_slot
)
2248 if (dai
->ops
&& dai
->ops
->set_channel_map
)
2249 return dai
->ops
->set_channel_map(dai
, tx_num
, tx_slot
,
2254 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map
);
2257 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2259 * @tristate: tristate enable
2261 * Tristates the DAI so that others can use it.
2263 int snd_soc_dai_set_tristate(struct snd_soc_dai
*dai
, int tristate
)
2265 if (dai
->ops
&& dai
->ops
->set_tristate
)
2266 return dai
->ops
->set_tristate(dai
, tristate
);
2270 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate
);
2273 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2275 * @mute: mute enable
2277 * Mutes the DAI DAC.
2279 int snd_soc_dai_digital_mute(struct snd_soc_dai
*dai
, int mute
)
2281 if (dai
->ops
&& dai
->ops
->digital_mute
)
2282 return dai
->ops
->digital_mute(dai
, mute
);
2286 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute
);
2289 * snd_soc_register_card - Register a card with the ASoC core
2291 * @card: Card to register
2293 * Note that currently this is an internal only function: it will be
2294 * exposed to machine drivers after further backporting of ASoC v2
2295 * registration APIs.
2297 static int snd_soc_register_card(struct snd_soc_card
*card
)
2299 if (!card
->name
|| !card
->dev
)
2302 INIT_LIST_HEAD(&card
->list
);
2303 card
->instantiated
= 0;
2305 mutex_lock(&client_mutex
);
2306 list_add(&card
->list
, &card_list
);
2307 snd_soc_instantiate_cards();
2308 mutex_unlock(&client_mutex
);
2310 dev_dbg(card
->dev
, "Registered card '%s'\n", card
->name
);
2316 * snd_soc_unregister_card - Unregister a card with the ASoC core
2318 * @card: Card to unregister
2320 * Note that currently this is an internal only function: it will be
2321 * exposed to machine drivers after further backporting of ASoC v2
2322 * registration APIs.
2324 static int snd_soc_unregister_card(struct snd_soc_card
*card
)
2326 mutex_lock(&client_mutex
);
2327 list_del(&card
->list
);
2328 mutex_unlock(&client_mutex
);
2330 dev_dbg(card
->dev
, "Unregistered card '%s'\n", card
->name
);
2335 static struct snd_soc_dai_ops null_dai_ops
= {
2339 * snd_soc_register_dai - Register a DAI with the ASoC core
2341 * @dai: DAI to register
2343 int snd_soc_register_dai(struct snd_soc_dai
*dai
)
2348 /* The device should become mandatory over time */
2350 printk(KERN_WARNING
"No device for DAI %s\n", dai
->name
);
2353 dai
->ops
= &null_dai_ops
;
2355 INIT_LIST_HEAD(&dai
->list
);
2357 mutex_lock(&client_mutex
);
2358 list_add(&dai
->list
, &dai_list
);
2359 snd_soc_instantiate_cards();
2360 mutex_unlock(&client_mutex
);
2362 pr_debug("Registered DAI '%s'\n", dai
->name
);
2366 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2369 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2371 * @dai: DAI to unregister
2373 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2375 mutex_lock(&client_mutex
);
2376 list_del(&dai
->list
);
2377 mutex_unlock(&client_mutex
);
2379 pr_debug("Unregistered DAI '%s'\n", dai
->name
);
2381 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2384 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2386 * @dai: Array of DAIs to register
2387 * @count: Number of DAIs
2389 int snd_soc_register_dais(struct snd_soc_dai
*dai
, size_t count
)
2393 for (i
= 0; i
< count
; i
++) {
2394 ret
= snd_soc_register_dai(&dai
[i
]);
2402 for (i
--; i
>= 0; i
--)
2403 snd_soc_unregister_dai(&dai
[i
]);
2407 EXPORT_SYMBOL_GPL(snd_soc_register_dais
);
2410 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2412 * @dai: Array of DAIs to unregister
2413 * @count: Number of DAIs
2415 void snd_soc_unregister_dais(struct snd_soc_dai
*dai
, size_t count
)
2419 for (i
= 0; i
< count
; i
++)
2420 snd_soc_unregister_dai(&dai
[i
]);
2422 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais
);
2425 * snd_soc_register_platform - Register a platform with the ASoC core
2427 * @platform: platform to register
2429 int snd_soc_register_platform(struct snd_soc_platform
*platform
)
2431 if (!platform
->name
)
2434 INIT_LIST_HEAD(&platform
->list
);
2436 mutex_lock(&client_mutex
);
2437 list_add(&platform
->list
, &platform_list
);
2438 snd_soc_instantiate_cards();
2439 mutex_unlock(&client_mutex
);
2441 pr_debug("Registered platform '%s'\n", platform
->name
);
2445 EXPORT_SYMBOL_GPL(snd_soc_register_platform
);
2448 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2450 * @platform: platform to unregister
2452 void snd_soc_unregister_platform(struct snd_soc_platform
*platform
)
2454 mutex_lock(&client_mutex
);
2455 list_del(&platform
->list
);
2456 mutex_unlock(&client_mutex
);
2458 pr_debug("Unregistered platform '%s'\n", platform
->name
);
2460 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform
);
2462 static u64 codec_format_map
[] = {
2463 SNDRV_PCM_FMTBIT_S16_LE
| SNDRV_PCM_FMTBIT_S16_BE
,
2464 SNDRV_PCM_FMTBIT_U16_LE
| SNDRV_PCM_FMTBIT_U16_BE
,
2465 SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S24_BE
,
2466 SNDRV_PCM_FMTBIT_U24_LE
| SNDRV_PCM_FMTBIT_U24_BE
,
2467 SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S32_BE
,
2468 SNDRV_PCM_FMTBIT_U32_LE
| SNDRV_PCM_FMTBIT_U32_BE
,
2469 SNDRV_PCM_FMTBIT_S24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2470 SNDRV_PCM_FMTBIT_U24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2471 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S20_3BE
,
2472 SNDRV_PCM_FMTBIT_U20_3LE
| SNDRV_PCM_FMTBIT_U20_3BE
,
2473 SNDRV_PCM_FMTBIT_S18_3LE
| SNDRV_PCM_FMTBIT_S18_3BE
,
2474 SNDRV_PCM_FMTBIT_U18_3LE
| SNDRV_PCM_FMTBIT_U18_3BE
,
2475 SNDRV_PCM_FMTBIT_FLOAT_LE
| SNDRV_PCM_FMTBIT_FLOAT_BE
,
2476 SNDRV_PCM_FMTBIT_FLOAT64_LE
| SNDRV_PCM_FMTBIT_FLOAT64_BE
,
2477 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2478 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
,
2481 /* Fix up the DAI formats for endianness: codecs don't actually see
2482 * the endianness of the data but we're using the CPU format
2483 * definitions which do need to include endianness so we ensure that
2484 * codec DAIs always have both big and little endian variants set.
2486 static void fixup_codec_formats(struct snd_soc_pcm_stream
*stream
)
2490 for (i
= 0; i
< ARRAY_SIZE(codec_format_map
); i
++)
2491 if (stream
->formats
& codec_format_map
[i
])
2492 stream
->formats
|= codec_format_map
[i
];
2496 * snd_soc_register_codec - Register a codec with the ASoC core
2498 * @codec: codec to register
2500 int snd_soc_register_codec(struct snd_soc_codec
*codec
)
2507 /* The device should become mandatory over time */
2509 printk(KERN_WARNING
"No device for codec %s\n", codec
->name
);
2511 INIT_LIST_HEAD(&codec
->list
);
2513 for (i
= 0; i
< codec
->num_dai
; i
++) {
2514 fixup_codec_formats(&codec
->dai
[i
].playback
);
2515 fixup_codec_formats(&codec
->dai
[i
].capture
);
2518 mutex_lock(&client_mutex
);
2519 list_add(&codec
->list
, &codec_list
);
2520 snd_soc_instantiate_cards();
2521 mutex_unlock(&client_mutex
);
2523 pr_debug("Registered codec '%s'\n", codec
->name
);
2527 EXPORT_SYMBOL_GPL(snd_soc_register_codec
);
2530 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2532 * @codec: codec to unregister
2534 void snd_soc_unregister_codec(struct snd_soc_codec
*codec
)
2536 mutex_lock(&client_mutex
);
2537 list_del(&codec
->list
);
2538 mutex_unlock(&client_mutex
);
2540 pr_debug("Unregistered codec '%s'\n", codec
->name
);
2542 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec
);
2544 static int __init
snd_soc_init(void)
2546 #ifdef CONFIG_DEBUG_FS
2547 debugfs_root
= debugfs_create_dir("asoc", NULL
);
2548 if (IS_ERR(debugfs_root
) || !debugfs_root
) {
2550 "ASoC: Failed to create debugfs directory\n");
2551 debugfs_root
= NULL
;
2555 return platform_driver_register(&soc_driver
);
2558 static void __exit
snd_soc_exit(void)
2560 #ifdef CONFIG_DEBUG_FS
2561 debugfs_remove_recursive(debugfs_root
);
2563 platform_driver_unregister(&soc_driver
);
2566 module_init(snd_soc_init
);
2567 module_exit(snd_soc_exit
);
2569 /* Module information */
2570 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2571 MODULE_DESCRIPTION("ALSA SoC Core");
2572 MODULE_LICENSE("GPL");
2573 MODULE_ALIAS("platform:soc-audio");