2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
7 * Author: Liam Girdwood
8 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
9 * with code, comments and ideas from :-
10 * Richard Purdie <richard@openedhand.com>
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
18 * 12th Aug 2005 Initial version.
19 * 25th Oct 2005 Working Codec, Interface and Platform registration.
22 * o Add hw rules to enforce rates, etc.
23 * o More testing with other codecs/machines.
24 * o Add more codecs and platforms to ensure good API coverage.
25 * o Support TDM on PCM and I2S
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/init.h>
31 #include <linux/delay.h>
33 #include <linux/bitops.h>
34 #include <linux/platform_device.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dapm.h>
40 #include <sound/initval.h>
45 #define dbg(format, arg...) printk(format, ## arg)
47 #define dbg(format, arg...)
50 static DEFINE_MUTEX(pcm_mutex);
51 static DEFINE_MUTEX(io_mutex);
52 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
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 snprintf(codec->ac97->dev.bus_id, BUS_ID_SIZE, "%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;
115 static inline const char* get_dai_name(int type)
118 case SND_SOC_DAI_AC97_BUS:
119 case SND_SOC_DAI_AC97:
121 case SND_SOC_DAI_I2S:
123 case SND_SOC_DAI_PCM:
130 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
131 * then initialized and any private data can be allocated. This also calls
132 * startup for the cpu DAI, platform, machine and codec DAI.
134 static int soc_pcm_open(struct snd_pcm_substream *substream)
136 struct snd_soc_pcm_runtime *rtd = substream->private_data;
137 struct snd_soc_device *socdev = rtd->socdev;
138 struct snd_pcm_runtime *runtime = substream->runtime;
139 struct snd_soc_dai_link *machine = rtd->dai;
140 struct snd_soc_platform *platform = socdev->platform;
141 struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
142 struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
145 mutex_lock(&pcm_mutex);
147 /* startup the audio subsystem */
148 if (cpu_dai->ops.startup) {
149 ret = cpu_dai->ops.startup(substream);
151 printk(KERN_ERR "asoc: can't open interface %s\n",
157 if (platform->pcm_ops->open) {
158 ret = platform->pcm_ops->open(substream);
160 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
165 if (codec_dai->ops.startup) {
166 ret = codec_dai->ops.startup(substream);
168 printk(KERN_ERR "asoc: can't open codec %s\n",
174 if (machine->ops && machine->ops->startup) {
175 ret = machine->ops->startup(substream);
177 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
182 /* Check that the codec and cpu DAI's are compatible */
183 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
184 runtime->hw.rate_min =
185 max(codec_dai->playback.rate_min, cpu_dai->playback.rate_min);
186 runtime->hw.rate_max =
187 min(codec_dai->playback.rate_max, cpu_dai->playback.rate_max);
188 runtime->hw.channels_min =
189 max(codec_dai->playback.channels_min,
190 cpu_dai->playback.channels_min);
191 runtime->hw.channels_max =
192 min(codec_dai->playback.channels_max,
193 cpu_dai->playback.channels_max);
194 runtime->hw.formats =
195 codec_dai->playback.formats & cpu_dai->playback.formats;
197 codec_dai->playback.rates & cpu_dai->playback.rates;
199 runtime->hw.rate_min =
200 max(codec_dai->capture.rate_min, cpu_dai->capture.rate_min);
201 runtime->hw.rate_max =
202 min(codec_dai->capture.rate_max, cpu_dai->capture.rate_max);
203 runtime->hw.channels_min =
204 max(codec_dai->capture.channels_min,
205 cpu_dai->capture.channels_min);
206 runtime->hw.channels_max =
207 min(codec_dai->capture.channels_max,
208 cpu_dai->capture.channels_max);
209 runtime->hw.formats =
210 codec_dai->capture.formats & cpu_dai->capture.formats;
212 codec_dai->capture.rates & cpu_dai->capture.rates;
215 snd_pcm_limit_hw_rates(runtime);
216 if (!runtime->hw.rates) {
217 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
218 codec_dai->name, cpu_dai->name);
221 if (!runtime->hw.formats) {
222 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
223 codec_dai->name, cpu_dai->name);
226 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
227 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
228 codec_dai->name, cpu_dai->name);
232 dbg("asoc: %s <-> %s info:\n",codec_dai->name, cpu_dai->name);
233 dbg("asoc: rate mask 0x%x\n", runtime->hw.rates);
234 dbg("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
235 runtime->hw.channels_max);
236 dbg("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
237 runtime->hw.rate_max);
239 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
240 cpu_dai->playback.active = codec_dai->playback.active = 1;
242 cpu_dai->capture.active = codec_dai->capture.active = 1;
243 cpu_dai->active = codec_dai->active = 1;
244 cpu_dai->runtime = runtime;
245 socdev->codec->active++;
246 mutex_unlock(&pcm_mutex);
250 if (machine->ops && machine->ops->shutdown)
251 machine->ops->shutdown(substream);
254 if (platform->pcm_ops->close)
255 platform->pcm_ops->close(substream);
258 if (cpu_dai->ops.shutdown)
259 cpu_dai->ops.shutdown(substream);
261 mutex_unlock(&pcm_mutex);
266 * Power down the audio subsystem pmdown_time msecs after close is called.
267 * This is to ensure there are no pops or clicks in between any music tracks
268 * due to DAPM power cycling.
270 static void close_delayed_work(struct work_struct *work)
272 struct snd_soc_device *socdev =
273 container_of(work, struct snd_soc_device, delayed_work.work);
274 struct snd_soc_codec *codec = socdev->codec;
275 struct snd_soc_codec_dai *codec_dai;
278 mutex_lock(&pcm_mutex);
279 for(i = 0; i < codec->num_dai; i++) {
280 codec_dai = &codec->dai[i];
282 dbg("pop wq checking: %s status: %s waiting: %s\n",
283 codec_dai->playback.stream_name,
284 codec_dai->playback.active ? "active" : "inactive",
285 codec_dai->pop_wait ? "yes" : "no");
287 /* are we waiting on this codec DAI stream */
288 if (codec_dai->pop_wait == 1) {
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 /* power down the codec power domain if no longer active */
296 if (codec->active == 0) {
297 dbg("pop wq D3 %s %s\n", codec->name,
298 codec_dai->playback.stream_name);
299 snd_soc_dapm_device_event(socdev,
300 SNDRV_CTL_POWER_D3hot);
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_dai_link *machine = rtd->dai;
317 struct snd_soc_platform *platform = socdev->platform;
318 struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
319 struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
320 struct snd_soc_codec *codec = socdev->codec;
322 mutex_lock(&pcm_mutex);
324 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
325 cpu_dai->playback.active = codec_dai->playback.active = 0;
327 cpu_dai->capture.active = codec_dai->capture.active = 0;
329 if (codec_dai->playback.active == 0 &&
330 codec_dai->capture.active == 0) {
331 cpu_dai->active = codec_dai->active = 0;
335 if (cpu_dai->ops.shutdown)
336 cpu_dai->ops.shutdown(substream);
338 if (codec_dai->ops.shutdown)
339 codec_dai->ops.shutdown(substream);
341 if (machine->ops && machine->ops->shutdown)
342 machine->ops->shutdown(substream);
344 if (platform->pcm_ops->close)
345 platform->pcm_ops->close(substream);
346 cpu_dai->runtime = NULL;
348 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
349 /* start delayed pop wq here for playback streams */
350 codec_dai->pop_wait = 1;
351 schedule_delayed_work(&socdev->delayed_work,
352 msecs_to_jiffies(pmdown_time));
354 /* capture streams can be powered down now */
355 snd_soc_dapm_stream_event(codec,
356 codec_dai->capture.stream_name,
357 SND_SOC_DAPM_STREAM_STOP);
359 if (codec->active == 0 && codec_dai->pop_wait == 0)
360 snd_soc_dapm_device_event(socdev,
361 SNDRV_CTL_POWER_D3hot);
364 mutex_unlock(&pcm_mutex);
369 * Called by ALSA when the PCM substream is prepared, can set format, sample
370 * rate, etc. This function is non atomic and can be called multiple times,
371 * it can refer to the runtime info.
373 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
375 struct snd_soc_pcm_runtime *rtd = substream->private_data;
376 struct snd_soc_device *socdev = rtd->socdev;
377 struct snd_soc_dai_link *machine = rtd->dai;
378 struct snd_soc_platform *platform = socdev->platform;
379 struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
380 struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
381 struct snd_soc_codec *codec = socdev->codec;
384 mutex_lock(&pcm_mutex);
386 if (machine->ops && machine->ops->prepare) {
387 ret = machine->ops->prepare(substream);
389 printk(KERN_ERR "asoc: machine prepare error\n");
394 if (platform->pcm_ops->prepare) {
395 ret = platform->pcm_ops->prepare(substream);
397 printk(KERN_ERR "asoc: platform prepare error\n");
402 if (codec_dai->ops.prepare) {
403 ret = codec_dai->ops.prepare(substream);
405 printk(KERN_ERR "asoc: codec DAI prepare error\n");
410 if (cpu_dai->ops.prepare) {
411 ret = cpu_dai->ops.prepare(substream);
413 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
418 /* we only want to start a DAPM playback stream if we are not waiting
419 * on an existing one stopping */
420 if (codec_dai->pop_wait) {
421 /* we are waiting for the delayed work to start */
422 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
423 snd_soc_dapm_stream_event(socdev->codec,
424 codec_dai->capture.stream_name,
425 SND_SOC_DAPM_STREAM_START);
427 codec_dai->pop_wait = 0;
428 cancel_delayed_work(&socdev->delayed_work);
429 if (codec_dai->dai_ops.digital_mute)
430 codec_dai->dai_ops.digital_mute(codec_dai, 0);
433 /* no delayed work - do we need to power up codec */
434 if (codec->dapm_state != SNDRV_CTL_POWER_D0) {
436 snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D1);
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_device_event(socdev, SNDRV_CTL_POWER_D0);
448 if (codec_dai->dai_ops.digital_mute)
449 codec_dai->dai_ops.digital_mute(codec_dai, 0);
452 /* codec already powered - power on widgets */
453 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
454 snd_soc_dapm_stream_event(codec,
455 codec_dai->playback.stream_name,
456 SND_SOC_DAPM_STREAM_START);
458 snd_soc_dapm_stream_event(codec,
459 codec_dai->capture.stream_name,
460 SND_SOC_DAPM_STREAM_START);
461 if (codec_dai->dai_ops.digital_mute)
462 codec_dai->dai_ops.digital_mute(codec_dai, 0);
467 mutex_unlock(&pcm_mutex);
472 * Called by ALSA when the hardware params are set by application. This
473 * function can also be called multiple times and can allocate buffers
474 * (using snd_pcm_lib_* ). It's non-atomic.
476 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
477 struct snd_pcm_hw_params *params)
479 struct snd_soc_pcm_runtime *rtd = substream->private_data;
480 struct snd_soc_device *socdev = rtd->socdev;
481 struct snd_soc_dai_link *machine = rtd->dai;
482 struct snd_soc_platform *platform = socdev->platform;
483 struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
484 struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
487 mutex_lock(&pcm_mutex);
489 if (machine->ops && machine->ops->hw_params) {
490 ret = machine->ops->hw_params(substream, params);
492 printk(KERN_ERR "asoc: machine hw_params failed\n");
497 if (codec_dai->ops.hw_params) {
498 ret = codec_dai->ops.hw_params(substream, params);
500 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
506 if (cpu_dai->ops.hw_params) {
507 ret = cpu_dai->ops.hw_params(substream, params);
509 printk(KERN_ERR "asoc: can't set interface %s hw params\n",
515 if (platform->pcm_ops->hw_params) {
516 ret = platform->pcm_ops->hw_params(substream, params);
518 printk(KERN_ERR "asoc: can't set platform %s hw params\n",
525 mutex_unlock(&pcm_mutex);
529 if (cpu_dai->ops.hw_free)
530 cpu_dai->ops.hw_free(substream);
533 if (codec_dai->ops.hw_free)
534 codec_dai->ops.hw_free(substream);
537 if(machine->ops && machine->ops->hw_free)
538 machine->ops->hw_free(substream);
540 mutex_unlock(&pcm_mutex);
545 * Free's resources allocated by hw_params, can be called multiple times
547 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
549 struct snd_soc_pcm_runtime *rtd = substream->private_data;
550 struct snd_soc_device *socdev = rtd->socdev;
551 struct snd_soc_dai_link *machine = rtd->dai;
552 struct snd_soc_platform *platform = socdev->platform;
553 struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
554 struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
555 struct snd_soc_codec *codec = socdev->codec;
557 mutex_lock(&pcm_mutex);
559 /* apply codec digital mute */
560 if (!codec->active && codec_dai->dai_ops.digital_mute)
561 codec_dai->dai_ops.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);
575 if (cpu_dai->ops.hw_free)
576 cpu_dai->ops.hw_free(substream);
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_dai_link *machine = rtd->dai;
587 struct snd_soc_platform *platform = socdev->platform;
588 struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
589 struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
592 if (codec_dai->ops.trigger) {
593 ret = codec_dai->ops.trigger(substream, cmd);
598 if (platform->pcm_ops->trigger) {
599 ret = platform->pcm_ops->trigger(substream, cmd);
604 if (cpu_dai->ops.trigger) {
605 ret = cpu_dai->ops.trigger(substream, cmd);
612 /* ASoC PCM operations */
613 static struct snd_pcm_ops soc_pcm_ops = {
614 .open = soc_pcm_open,
615 .close = soc_codec_close,
616 .hw_params = soc_pcm_hw_params,
617 .hw_free = soc_pcm_hw_free,
618 .prepare = soc_pcm_prepare,
619 .trigger = soc_pcm_trigger,
623 /* powers down audio subsystem for suspend */
624 static int soc_suspend(struct platform_device *pdev, pm_message_t state)
626 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
627 struct snd_soc_machine *machine = socdev->machine;
628 struct snd_soc_platform *platform = socdev->platform;
629 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
630 struct snd_soc_codec *codec = socdev->codec;
633 /* mute any active DAC's */
634 for(i = 0; i < machine->num_links; i++) {
635 struct snd_soc_codec_dai *dai = machine->dai_link[i].codec_dai;
636 if (dai->dai_ops.digital_mute && dai->playback.active)
637 dai->dai_ops.digital_mute(dai, 1);
640 if (machine->suspend_pre)
641 machine->suspend_pre(pdev, state);
643 for(i = 0; i < machine->num_links; i++) {
644 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
645 if (cpu_dai->suspend && cpu_dai->type != SND_SOC_DAI_AC97)
646 cpu_dai->suspend(pdev, cpu_dai);
647 if (platform->suspend)
648 platform->suspend(pdev, cpu_dai);
651 /* close any waiting streams and save state */
652 run_delayed_work(&socdev->delayed_work);
653 codec->suspend_dapm_state = codec->dapm_state;
655 for(i = 0; i < codec->num_dai; i++) {
656 char *stream = codec->dai[i].playback.stream_name;
658 snd_soc_dapm_stream_event(codec, stream,
659 SND_SOC_DAPM_STREAM_SUSPEND);
660 stream = codec->dai[i].capture.stream_name;
662 snd_soc_dapm_stream_event(codec, stream,
663 SND_SOC_DAPM_STREAM_SUSPEND);
666 if (codec_dev->suspend)
667 codec_dev->suspend(pdev, state);
669 for(i = 0; i < machine->num_links; i++) {
670 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
671 if (cpu_dai->suspend && cpu_dai->type == SND_SOC_DAI_AC97)
672 cpu_dai->suspend(pdev, cpu_dai);
675 if (machine->suspend_post)
676 machine->suspend_post(pdev, state);
681 /* powers up audio subsystem after a suspend */
682 static int soc_resume(struct platform_device *pdev)
684 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
685 struct snd_soc_machine *machine = socdev->machine;
686 struct snd_soc_platform *platform = socdev->platform;
687 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
688 struct snd_soc_codec *codec = socdev->codec;
691 if (machine->resume_pre)
692 machine->resume_pre(pdev);
694 for(i = 0; i < machine->num_links; i++) {
695 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
696 if (cpu_dai->resume && cpu_dai->type == SND_SOC_DAI_AC97)
697 cpu_dai->resume(pdev, cpu_dai);
700 if (codec_dev->resume)
701 codec_dev->resume(pdev);
703 for(i = 0; i < codec->num_dai; i++) {
704 char* stream = codec->dai[i].playback.stream_name;
706 snd_soc_dapm_stream_event(codec, stream,
707 SND_SOC_DAPM_STREAM_RESUME);
708 stream = codec->dai[i].capture.stream_name;
710 snd_soc_dapm_stream_event(codec, stream,
711 SND_SOC_DAPM_STREAM_RESUME);
714 /* unmute any active DAC's */
715 for(i = 0; i < machine->num_links; i++) {
716 struct snd_soc_codec_dai *dai = machine->dai_link[i].codec_dai;
717 if (dai->dai_ops.digital_mute && dai->playback.active)
718 dai->dai_ops.digital_mute(dai, 0);
721 for(i = 0; i < machine->num_links; i++) {
722 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
723 if (cpu_dai->resume && cpu_dai->type != SND_SOC_DAI_AC97)
724 cpu_dai->resume(pdev, cpu_dai);
725 if (platform->resume)
726 platform->resume(pdev, cpu_dai);
729 if (machine->resume_post)
730 machine->resume_post(pdev);
736 #define soc_suspend NULL
737 #define soc_resume NULL
740 /* probes a new socdev */
741 static int soc_probe(struct platform_device *pdev)
744 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
745 struct snd_soc_machine *machine = socdev->machine;
746 struct snd_soc_platform *platform = socdev->platform;
747 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
749 if (machine->probe) {
750 ret = machine->probe(pdev);
755 for (i = 0; i < machine->num_links; i++) {
756 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
757 if (cpu_dai->probe) {
758 ret = cpu_dai->probe(pdev);
764 if (codec_dev->probe) {
765 ret = codec_dev->probe(pdev);
770 if (platform->probe) {
771 ret = platform->probe(pdev);
776 /* DAPM stream work */
777 INIT_DELAYED_WORK(&socdev->delayed_work, close_delayed_work);
781 if (codec_dev->remove)
782 codec_dev->remove(pdev);
785 for (i--; i >= 0; i--) {
786 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
788 cpu_dai->remove(pdev);
792 machine->remove(pdev);
797 /* removes a socdev */
798 static int soc_remove(struct platform_device *pdev)
801 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
802 struct snd_soc_machine *machine = socdev->machine;
803 struct snd_soc_platform *platform = socdev->platform;
804 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
806 run_delayed_work(&socdev->delayed_work);
808 if (platform->remove)
809 platform->remove(pdev);
811 if (codec_dev->remove)
812 codec_dev->remove(pdev);
814 for (i = 0; i < machine->num_links; i++) {
815 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
817 cpu_dai->remove(pdev);
821 machine->remove(pdev);
826 /* ASoC platform driver */
827 static struct platform_driver soc_driver = {
832 .remove = soc_remove,
833 .suspend = soc_suspend,
834 .resume = soc_resume,
837 /* create a new pcm */
838 static int soc_new_pcm(struct snd_soc_device *socdev,
839 struct snd_soc_dai_link *dai_link, int num)
841 struct snd_soc_codec *codec = socdev->codec;
842 struct snd_soc_codec_dai *codec_dai = dai_link->codec_dai;
843 struct snd_soc_cpu_dai *cpu_dai = dai_link->cpu_dai;
844 struct snd_soc_pcm_runtime *rtd;
847 int ret = 0, playback = 0, capture = 0;
849 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
854 rtd->socdev = socdev;
855 codec_dai->codec = socdev->codec;
857 /* check client and interface hw capabilities */
858 sprintf(new_name, "%s %s-%s-%d",dai_link->stream_name, codec_dai->name,
859 get_dai_name(cpu_dai->type), num);
861 if (codec_dai->playback.channels_min)
863 if (codec_dai->capture.channels_min)
866 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
869 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
874 pcm->private_data = rtd;
875 soc_pcm_ops.mmap = socdev->platform->pcm_ops->mmap;
876 soc_pcm_ops.pointer = socdev->platform->pcm_ops->pointer;
877 soc_pcm_ops.ioctl = socdev->platform->pcm_ops->ioctl;
878 soc_pcm_ops.copy = socdev->platform->pcm_ops->copy;
879 soc_pcm_ops.silence = socdev->platform->pcm_ops->silence;
880 soc_pcm_ops.ack = socdev->platform->pcm_ops->ack;
881 soc_pcm_ops.page = socdev->platform->pcm_ops->page;
884 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
887 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
889 ret = socdev->platform->pcm_new(codec->card, codec_dai, pcm);
891 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
896 pcm->private_free = socdev->platform->pcm_free;
897 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
902 /* codec register dump */
903 static ssize_t codec_reg_show(struct device *dev,
904 struct device_attribute *attr, char *buf)
906 struct snd_soc_device *devdata = dev_get_drvdata(dev);
907 struct snd_soc_codec *codec = devdata->codec;
908 int i, step = 1, count = 0;
910 if (!codec->reg_cache_size)
913 if (codec->reg_cache_step)
914 step = codec->reg_cache_step;
916 count += sprintf(buf, "%s registers\n", codec->name);
917 for(i = 0; i < codec->reg_cache_size; i += step)
918 count += sprintf(buf + count, "%2x: %4x\n", i, codec->read(codec, i));
922 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
925 * snd_soc_new_ac97_codec - initailise AC97 device
926 * @codec: audio codec
927 * @ops: AC97 bus operations
928 * @num: AC97 codec number
930 * Initialises AC97 codec resources for use by ad-hoc devices only.
932 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
933 struct snd_ac97_bus_ops *ops, int num)
935 mutex_lock(&codec->mutex);
937 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
938 if (codec->ac97 == NULL) {
939 mutex_unlock(&codec->mutex);
943 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
944 if (codec->ac97->bus == NULL) {
947 mutex_unlock(&codec->mutex);
951 codec->ac97->bus->ops = ops;
952 codec->ac97->num = num;
953 mutex_unlock(&codec->mutex);
956 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
959 * snd_soc_free_ac97_codec - free AC97 codec device
960 * @codec: audio codec
962 * Frees AC97 codec device resources.
964 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
966 mutex_lock(&codec->mutex);
967 kfree(codec->ac97->bus);
970 mutex_unlock(&codec->mutex);
972 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
975 * snd_soc_update_bits - update codec register bits
976 * @codec: audio codec
977 * @reg: codec register
978 * @mask: register mask
981 * Writes new register value.
983 * Returns 1 for change else 0.
985 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
986 unsigned short mask, unsigned short value)
989 unsigned short old, new;
991 mutex_lock(&io_mutex);
992 old = snd_soc_read(codec, reg);
993 new = (old & ~mask) | value;
996 snd_soc_write(codec, reg, new);
998 mutex_unlock(&io_mutex);
1001 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1004 * snd_soc_test_bits - test register for change
1005 * @codec: audio codec
1006 * @reg: codec register
1007 * @mask: register mask
1010 * Tests a register with a new value and checks if the new value is
1011 * different from the old value.
1013 * Returns 1 for change else 0.
1015 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1016 unsigned short mask, unsigned short value)
1019 unsigned short old, new;
1021 mutex_lock(&io_mutex);
1022 old = snd_soc_read(codec, reg);
1023 new = (old & ~mask) | value;
1024 change = old != new;
1025 mutex_unlock(&io_mutex);
1029 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1032 * snd_soc_new_pcms - create new sound card and pcms
1033 * @socdev: the SoC audio device
1035 * Create a new sound card based upon the codec and interface pcms.
1037 * Returns 0 for success, else error.
1039 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1041 struct snd_soc_codec *codec = socdev->codec;
1042 struct snd_soc_machine *machine = socdev->machine;
1045 mutex_lock(&codec->mutex);
1047 /* register a sound card */
1048 codec->card = snd_card_new(idx, xid, codec->owner, 0);
1050 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1052 mutex_unlock(&codec->mutex);
1056 codec->card->dev = socdev->dev;
1057 codec->card->private_data = codec;
1058 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1060 /* create the pcms */
1061 for(i = 0; i < machine->num_links; i++) {
1062 ret = soc_new_pcm(socdev, &machine->dai_link[i], i);
1064 printk(KERN_ERR "asoc: can't create pcm %s\n",
1065 machine->dai_link[i].stream_name);
1066 mutex_unlock(&codec->mutex);
1071 mutex_unlock(&codec->mutex);
1074 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1077 * snd_soc_register_card - register sound card
1078 * @socdev: the SoC audio device
1080 * Register a SoC sound card. Also registers an AC97 device if the
1081 * codec is AC97 for ad hoc devices.
1083 * Returns 0 for success, else error.
1085 int snd_soc_register_card(struct snd_soc_device *socdev)
1087 struct snd_soc_codec *codec = socdev->codec;
1088 struct snd_soc_machine *machine = socdev->machine;
1089 int ret = 0, i, ac97 = 0, err = 0;
1091 mutex_lock(&codec->mutex);
1092 for(i = 0; i < machine->num_links; i++) {
1093 if (socdev->machine->dai_link[i].init) {
1094 err = socdev->machine->dai_link[i].init(codec);
1096 printk(KERN_ERR "asoc: failed to init %s\n",
1097 socdev->machine->dai_link[i].stream_name);
1101 if (socdev->machine->dai_link[i].codec_dai->type ==
1102 SND_SOC_DAI_AC97_BUS)
1105 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1106 "%s", machine->name);
1107 snprintf(codec->card->longname, sizeof(codec->card->longname),
1108 "%s (%s)", machine->name, codec->name);
1110 ret = snd_card_register(codec->card);
1112 printk(KERN_ERR "asoc: failed to register soundcard for codec %s\n",
1117 #ifdef CONFIG_SND_SOC_AC97_BUS
1119 ret = soc_ac97_dev_register(codec);
1121 printk(KERN_ERR "asoc: AC97 device register failed\n");
1122 snd_card_free(codec->card);
1128 err = snd_soc_dapm_sys_add(socdev->dev);
1130 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1132 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1134 printk(KERN_WARNING "asoc: failed to add codec sysfs entries\n");
1136 mutex_unlock(&codec->mutex);
1139 EXPORT_SYMBOL_GPL(snd_soc_register_card);
1142 * snd_soc_free_pcms - free sound card and pcms
1143 * @socdev: the SoC audio device
1145 * Frees sound card and pcms associated with the socdev.
1146 * Also unregister the codec if it is an AC97 device.
1148 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1150 struct snd_soc_codec *codec = socdev->codec;
1151 #ifdef CONFIG_SND_SOC_AC97_BUS
1152 struct snd_soc_codec_dai *codec_dai;
1156 mutex_lock(&codec->mutex);
1157 #ifdef CONFIG_SND_SOC_AC97_BUS
1158 for(i = 0; i < codec->num_dai; i++) {
1159 codec_dai = &codec->dai[i];
1160 if (codec_dai->type == SND_SOC_DAI_AC97_BUS && codec->ac97) {
1161 soc_ac97_dev_unregister(codec);
1169 snd_card_free(codec->card);
1170 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1171 mutex_unlock(&codec->mutex);
1173 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1176 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1177 * @substream: the pcm substream
1178 * @hw: the hardware parameters
1180 * Sets the substream runtime hardware parameters.
1182 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1183 const struct snd_pcm_hardware *hw)
1185 struct snd_pcm_runtime *runtime = substream->runtime;
1186 runtime->hw.info = hw->info;
1187 runtime->hw.formats = hw->formats;
1188 runtime->hw.period_bytes_min = hw->period_bytes_min;
1189 runtime->hw.period_bytes_max = hw->period_bytes_max;
1190 runtime->hw.periods_min = hw->periods_min;
1191 runtime->hw.periods_max = hw->periods_max;
1192 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1193 runtime->hw.fifo_size = hw->fifo_size;
1196 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1199 * snd_soc_cnew - create new control
1200 * @_template: control template
1201 * @data: control private data
1202 * @lnng_name: control long name
1204 * Create a new mixer control from a template control.
1206 * Returns 0 for success, else error.
1208 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1209 void *data, char *long_name)
1211 struct snd_kcontrol_new template;
1213 memcpy(&template, _template, sizeof(template));
1215 template.name = long_name;
1216 template.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
1219 return snd_ctl_new1(&template, data);
1221 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1224 * snd_soc_info_enum_double - enumerated double mixer info callback
1225 * @kcontrol: mixer control
1226 * @uinfo: control element information
1228 * Callback to provide information about a double enumerated
1231 * Returns 0 for success.
1233 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1234 struct snd_ctl_elem_info *uinfo)
1236 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1238 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1239 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1240 uinfo->value.enumerated.items = e->mask;
1242 if (uinfo->value.enumerated.item > e->mask - 1)
1243 uinfo->value.enumerated.item = e->mask - 1;
1244 strcpy(uinfo->value.enumerated.name,
1245 e->texts[uinfo->value.enumerated.item]);
1248 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1251 * snd_soc_get_enum_double - enumerated double mixer get callback
1252 * @kcontrol: mixer control
1253 * @uinfo: control element information
1255 * Callback to get the value of a double enumerated mixer.
1257 * Returns 0 for success.
1259 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1260 struct snd_ctl_elem_value *ucontrol)
1262 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1263 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1264 unsigned short val, bitmask;
1266 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1268 val = snd_soc_read(codec, e->reg);
1269 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1270 if (e->shift_l != e->shift_r)
1271 ucontrol->value.enumerated.item[1] =
1272 (val >> e->shift_r) & (bitmask - 1);
1276 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1279 * snd_soc_put_enum_double - enumerated double mixer put callback
1280 * @kcontrol: mixer control
1281 * @uinfo: control element information
1283 * Callback to set the value of a double enumerated mixer.
1285 * Returns 0 for success.
1287 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1288 struct snd_ctl_elem_value *ucontrol)
1290 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1291 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1293 unsigned short mask, bitmask;
1295 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1297 if (ucontrol->value.enumerated.item[0] > e->mask - 1)
1299 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1300 mask = (bitmask - 1) << e->shift_l;
1301 if (e->shift_l != e->shift_r) {
1302 if (ucontrol->value.enumerated.item[1] > e->mask - 1)
1304 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1305 mask |= (bitmask - 1) << e->shift_r;
1308 return snd_soc_update_bits(codec, e->reg, mask, val);
1310 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1313 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1314 * @kcontrol: mixer control
1315 * @uinfo: control element information
1317 * Callback to provide information about an external enumerated
1320 * Returns 0 for success.
1322 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1323 struct snd_ctl_elem_info *uinfo)
1325 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1327 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1329 uinfo->value.enumerated.items = e->mask;
1331 if (uinfo->value.enumerated.item > e->mask - 1)
1332 uinfo->value.enumerated.item = e->mask - 1;
1333 strcpy(uinfo->value.enumerated.name,
1334 e->texts[uinfo->value.enumerated.item]);
1337 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1340 * snd_soc_info_volsw_ext - external single mixer info callback
1341 * @kcontrol: mixer control
1342 * @uinfo: control element information
1344 * Callback to provide information about a single external mixer control.
1346 * Returns 0 for success.
1348 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1349 struct snd_ctl_elem_info *uinfo)
1351 int mask = kcontrol->private_value;
1354 mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1356 uinfo->value.integer.min = 0;
1357 uinfo->value.integer.max = mask;
1360 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1363 * snd_soc_info_volsw - single mixer info callback
1364 * @kcontrol: mixer control
1365 * @uinfo: control element information
1367 * Callback to provide information about a single mixer control.
1369 * Returns 0 for success.
1371 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1372 struct snd_ctl_elem_info *uinfo)
1374 int mask = (kcontrol->private_value >> 16) & 0xff;
1375 int shift = (kcontrol->private_value >> 8) & 0x0f;
1376 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1379 mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1380 uinfo->count = shift == rshift ? 1 : 2;
1381 uinfo->value.integer.min = 0;
1382 uinfo->value.integer.max = mask;
1385 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1388 * snd_soc_get_volsw - single mixer get callback
1389 * @kcontrol: mixer control
1390 * @uinfo: control element information
1392 * Callback to get the value of a single mixer control.
1394 * Returns 0 for success.
1396 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1397 struct snd_ctl_elem_value *ucontrol)
1399 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1400 int reg = kcontrol->private_value & 0xff;
1401 int shift = (kcontrol->private_value >> 8) & 0x0f;
1402 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1403 int mask = (kcontrol->private_value >> 16) & 0xff;
1404 int invert = (kcontrol->private_value >> 24) & 0x01;
1406 ucontrol->value.integer.value[0] =
1407 (snd_soc_read(codec, reg) >> shift) & mask;
1408 if (shift != rshift)
1409 ucontrol->value.integer.value[1] =
1410 (snd_soc_read(codec, reg) >> rshift) & mask;
1412 ucontrol->value.integer.value[0] =
1413 mask - ucontrol->value.integer.value[0];
1414 if (shift != rshift)
1415 ucontrol->value.integer.value[1] =
1416 mask - ucontrol->value.integer.value[1];
1421 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1424 * snd_soc_put_volsw - single mixer put callback
1425 * @kcontrol: mixer control
1426 * @uinfo: control element information
1428 * Callback to set the value of a single mixer control.
1430 * Returns 0 for success.
1432 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1433 struct snd_ctl_elem_value *ucontrol)
1435 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1436 int reg = kcontrol->private_value & 0xff;
1437 int shift = (kcontrol->private_value >> 8) & 0x0f;
1438 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1439 int mask = (kcontrol->private_value >> 16) & 0xff;
1440 int invert = (kcontrol->private_value >> 24) & 0x01;
1442 unsigned short val, val2, val_mask;
1444 val = (ucontrol->value.integer.value[0] & mask);
1447 val_mask = mask << shift;
1449 if (shift != rshift) {
1450 val2 = (ucontrol->value.integer.value[1] & mask);
1453 val_mask |= mask << rshift;
1454 val |= val2 << rshift;
1456 err = snd_soc_update_bits(codec, reg, val_mask, val);
1459 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1462 * snd_soc_info_volsw_2r - double mixer info callback
1463 * @kcontrol: mixer control
1464 * @uinfo: control element information
1466 * Callback to provide information about a double mixer control that
1467 * spans 2 codec registers.
1469 * Returns 0 for success.
1471 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1472 struct snd_ctl_elem_info *uinfo)
1474 int mask = (kcontrol->private_value >> 12) & 0xff;
1477 mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1479 uinfo->value.integer.min = 0;
1480 uinfo->value.integer.max = mask;
1483 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1486 * snd_soc_get_volsw_2r - double mixer get callback
1487 * @kcontrol: mixer control
1488 * @uinfo: control element information
1490 * Callback to get the value of a double mixer control that spans 2 registers.
1492 * Returns 0 for success.
1494 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1495 struct snd_ctl_elem_value *ucontrol)
1497 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1498 int reg = kcontrol->private_value & 0xff;
1499 int reg2 = (kcontrol->private_value >> 24) & 0xff;
1500 int shift = (kcontrol->private_value >> 8) & 0x0f;
1501 int mask = (kcontrol->private_value >> 12) & 0xff;
1502 int invert = (kcontrol->private_value >> 20) & 0x01;
1504 ucontrol->value.integer.value[0] =
1505 (snd_soc_read(codec, reg) >> shift) & mask;
1506 ucontrol->value.integer.value[1] =
1507 (snd_soc_read(codec, reg2) >> shift) & mask;
1509 ucontrol->value.integer.value[0] =
1510 mask - ucontrol->value.integer.value[0];
1511 ucontrol->value.integer.value[1] =
1512 mask - ucontrol->value.integer.value[1];
1517 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
1520 * snd_soc_put_volsw_2r - double mixer set callback
1521 * @kcontrol: mixer control
1522 * @uinfo: control element information
1524 * Callback to set the value of a double mixer control that spans 2 registers.
1526 * Returns 0 for success.
1528 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
1529 struct snd_ctl_elem_value *ucontrol)
1531 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1532 int reg = kcontrol->private_value & 0xff;
1533 int reg2 = (kcontrol->private_value >> 24) & 0xff;
1534 int shift = (kcontrol->private_value >> 8) & 0x0f;
1535 int mask = (kcontrol->private_value >> 12) & 0xff;
1536 int invert = (kcontrol->private_value >> 20) & 0x01;
1538 unsigned short val, val2, val_mask;
1540 val_mask = mask << shift;
1541 val = (ucontrol->value.integer.value[0] & mask);
1542 val2 = (ucontrol->value.integer.value[1] & mask);
1550 val2 = val2 << shift;
1552 if ((err = snd_soc_update_bits(codec, reg, val_mask, val)) < 0)
1555 err = snd_soc_update_bits(codec, reg2, val_mask, val2);
1558 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
1560 static int __devinit snd_soc_init(void)
1562 printk(KERN_INFO "ASoC version %s\n", SND_SOC_VERSION);
1563 return platform_driver_register(&soc_driver);
1566 static void snd_soc_exit(void)
1568 platform_driver_unregister(&soc_driver);
1571 module_init(snd_soc_init);
1572 module_exit(snd_soc_exit);
1574 /* Module information */
1575 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1576 MODULE_DESCRIPTION("ALSA SoC Core");
1577 MODULE_LICENSE("GPL");