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 DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry *debugfs_root;
46 static DEFINE_MUTEX(client_mutex);
47 static LIST_HEAD(card_list);
48 static LIST_HEAD(dai_list);
49 static LIST_HEAD(platform_list);
50 static LIST_HEAD(codec_list);
52 static int snd_soc_register_card(struct snd_soc_card *card);
53 static int snd_soc_unregister_card(struct snd_soc_card *card);
56 * This is a timeout to do a DAPM powerdown after a stream is closed().
57 * It can be used to eliminate pops between different playback streams, e.g.
58 * between two audio tracks.
60 static int pmdown_time = 5000;
61 module_param(pmdown_time, int, 0);
62 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
65 * This function forces any delayed work to be queued and run.
67 static int run_delayed_work(struct delayed_work *dwork)
71 /* cancel any work waiting to be queued. */
72 ret = cancel_delayed_work(dwork);
74 /* if there was any work waiting then we run it now and
75 * wait for it's completion */
77 schedule_delayed_work(dwork, 0);
78 flush_scheduled_work();
83 /* codec register dump */
84 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
86 int i, step = 1, count = 0;
88 if (!codec->reg_cache_size)
91 if (codec->reg_cache_step)
92 step = codec->reg_cache_step;
94 count += sprintf(buf, "%s registers\n", codec->name);
95 for (i = 0; i < codec->reg_cache_size; i += step) {
96 if (codec->readable_register && !codec->readable_register(i))
99 count += sprintf(buf + count, "%2x: ", i);
100 if (count >= PAGE_SIZE - 1)
103 if (codec->display_register)
104 count += codec->display_register(codec, buf + count,
105 PAGE_SIZE - count, i);
107 count += snprintf(buf + count, PAGE_SIZE - count,
108 "%4x", codec->read(codec, i));
110 if (count >= PAGE_SIZE - 1)
113 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
114 if (count >= PAGE_SIZE - 1)
118 /* Truncate count; min() would cause a warning */
119 if (count >= PAGE_SIZE)
120 count = PAGE_SIZE - 1;
124 static ssize_t codec_reg_show(struct device *dev,
125 struct device_attribute *attr, char *buf)
127 struct snd_soc_device *devdata = dev_get_drvdata(dev);
128 return soc_codec_reg_show(devdata->card->codec, buf);
131 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
133 #ifdef CONFIG_DEBUG_FS
134 static int codec_reg_open_file(struct inode *inode, struct file *file)
136 file->private_data = inode->i_private;
140 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
141 size_t count, loff_t *ppos)
144 struct snd_soc_codec *codec = file->private_data;
145 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
148 ret = soc_codec_reg_show(codec, buf);
150 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
155 static ssize_t codec_reg_write_file(struct file *file,
156 const char __user *user_buf, size_t count, loff_t *ppos)
161 unsigned long reg, value;
163 struct snd_soc_codec *codec = file->private_data;
165 buf_size = min(count, (sizeof(buf)-1));
166 if (copy_from_user(buf, user_buf, buf_size))
170 if (codec->reg_cache_step)
171 step = codec->reg_cache_step;
173 while (*start == ' ')
175 reg = simple_strtoul(start, &start, 16);
176 if ((reg >= codec->reg_cache_size) || (reg % step))
178 while (*start == ' ')
180 if (strict_strtoul(start, 16, &value))
182 codec->write(codec, reg, value);
186 static const struct file_operations codec_reg_fops = {
187 .open = codec_reg_open_file,
188 .read = codec_reg_read_file,
189 .write = codec_reg_write_file,
192 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
194 char codec_root[128];
197 snprintf(codec_root, sizeof(codec_root),
198 "%s.%s", codec->name, dev_name(codec->dev));
200 snprintf(codec_root, sizeof(codec_root),
203 codec->debugfs_codec_root = debugfs_create_dir(codec_root,
205 if (!codec->debugfs_codec_root) {
207 "ASoC: Failed to create codec debugfs directory\n");
211 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
212 codec->debugfs_codec_root,
213 codec, &codec_reg_fops);
214 if (!codec->debugfs_reg)
216 "ASoC: Failed to create codec register debugfs file\n");
218 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
219 codec->debugfs_codec_root,
221 if (!codec->debugfs_pop_time)
223 "Failed to create pop time debugfs file\n");
225 codec->debugfs_dapm = debugfs_create_dir("dapm",
226 codec->debugfs_codec_root);
227 if (!codec->debugfs_dapm)
229 "Failed to create DAPM debugfs directory\n");
231 snd_soc_dapm_debugfs_init(codec);
234 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
236 debugfs_remove_recursive(codec->debugfs_codec_root);
241 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
245 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
250 #ifdef CONFIG_SND_SOC_AC97_BUS
251 /* unregister ac97 codec */
252 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
254 if (codec->ac97->dev.bus)
255 device_unregister(&codec->ac97->dev);
259 /* stop no dev release warning */
260 static void soc_ac97_device_release(struct device *dev){}
262 /* register ac97 codec to bus */
263 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
267 codec->ac97->dev.bus = &ac97_bus_type;
268 codec->ac97->dev.parent = codec->card->dev;
269 codec->ac97->dev.release = soc_ac97_device_release;
271 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
272 codec->card->number, 0, codec->name);
273 err = device_register(&codec->ac97->dev);
275 snd_printk(KERN_ERR "Can't register ac97 bus\n");
276 codec->ac97->dev.bus = NULL;
283 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
285 struct snd_soc_pcm_runtime *rtd = substream->private_data;
286 struct snd_soc_device *socdev = rtd->socdev;
287 struct snd_soc_card *card = socdev->card;
288 struct snd_soc_dai_link *machine = rtd->dai;
289 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
290 struct snd_soc_dai *codec_dai = machine->codec_dai;
293 if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
294 machine->symmetric_rates) {
295 dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
298 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
299 SNDRV_PCM_HW_PARAM_RATE,
304 "Unable to apply rate symmetry constraint: %d\n", ret);
313 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
314 * then initialized and any private data can be allocated. This also calls
315 * startup for the cpu DAI, platform, machine and codec DAI.
317 static int soc_pcm_open(struct snd_pcm_substream *substream)
319 struct snd_soc_pcm_runtime *rtd = substream->private_data;
320 struct snd_soc_device *socdev = rtd->socdev;
321 struct snd_soc_card *card = socdev->card;
322 struct snd_pcm_runtime *runtime = substream->runtime;
323 struct snd_soc_dai_link *machine = rtd->dai;
324 struct snd_soc_platform *platform = card->platform;
325 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
326 struct snd_soc_dai *codec_dai = machine->codec_dai;
329 mutex_lock(&pcm_mutex);
331 /* startup the audio subsystem */
332 if (cpu_dai->ops->startup) {
333 ret = cpu_dai->ops->startup(substream, cpu_dai);
335 printk(KERN_ERR "asoc: can't open interface %s\n",
341 if (platform->pcm_ops->open) {
342 ret = platform->pcm_ops->open(substream);
344 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
349 if (codec_dai->ops->startup) {
350 ret = codec_dai->ops->startup(substream, codec_dai);
352 printk(KERN_ERR "asoc: can't open codec %s\n",
358 if (machine->ops && machine->ops->startup) {
359 ret = machine->ops->startup(substream);
361 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
366 /* Check that the codec and cpu DAI's are compatible */
367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
368 runtime->hw.rate_min =
369 max(codec_dai->playback.rate_min,
370 cpu_dai->playback.rate_min);
371 runtime->hw.rate_max =
372 min(codec_dai->playback.rate_max,
373 cpu_dai->playback.rate_max);
374 runtime->hw.channels_min =
375 max(codec_dai->playback.channels_min,
376 cpu_dai->playback.channels_min);
377 runtime->hw.channels_max =
378 min(codec_dai->playback.channels_max,
379 cpu_dai->playback.channels_max);
380 runtime->hw.formats =
381 codec_dai->playback.formats & cpu_dai->playback.formats;
383 codec_dai->playback.rates & cpu_dai->playback.rates;
385 runtime->hw.rate_min =
386 max(codec_dai->capture.rate_min,
387 cpu_dai->capture.rate_min);
388 runtime->hw.rate_max =
389 min(codec_dai->capture.rate_max,
390 cpu_dai->capture.rate_max);
391 runtime->hw.channels_min =
392 max(codec_dai->capture.channels_min,
393 cpu_dai->capture.channels_min);
394 runtime->hw.channels_max =
395 min(codec_dai->capture.channels_max,
396 cpu_dai->capture.channels_max);
397 runtime->hw.formats =
398 codec_dai->capture.formats & cpu_dai->capture.formats;
400 codec_dai->capture.rates & cpu_dai->capture.rates;
403 snd_pcm_limit_hw_rates(runtime);
404 if (!runtime->hw.rates) {
405 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
406 codec_dai->name, cpu_dai->name);
409 if (!runtime->hw.formats) {
410 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
411 codec_dai->name, cpu_dai->name);
414 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
415 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
416 codec_dai->name, cpu_dai->name);
420 /* Symmetry only applies if we've already got an active stream. */
421 if (cpu_dai->active || codec_dai->active) {
422 ret = soc_pcm_apply_symmetry(substream);
427 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
428 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
429 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
430 runtime->hw.channels_max);
431 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
432 runtime->hw.rate_max);
434 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
435 cpu_dai->playback.active = codec_dai->playback.active = 1;
437 cpu_dai->capture.active = codec_dai->capture.active = 1;
438 cpu_dai->active = codec_dai->active = 1;
439 cpu_dai->runtime = runtime;
440 card->codec->active++;
441 mutex_unlock(&pcm_mutex);
445 if (machine->ops && machine->ops->shutdown)
446 machine->ops->shutdown(substream);
449 if (platform->pcm_ops->close)
450 platform->pcm_ops->close(substream);
453 if (cpu_dai->ops->shutdown)
454 cpu_dai->ops->shutdown(substream, cpu_dai);
456 mutex_unlock(&pcm_mutex);
461 * Power down the audio subsystem pmdown_time msecs after close is called.
462 * This is to ensure there are no pops or clicks in between any music tracks
463 * due to DAPM power cycling.
465 static void close_delayed_work(struct work_struct *work)
467 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
469 struct snd_soc_codec *codec = card->codec;
470 struct snd_soc_dai *codec_dai;
473 mutex_lock(&pcm_mutex);
474 for (i = 0; i < codec->num_dai; i++) {
475 codec_dai = &codec->dai[i];
477 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
478 codec_dai->playback.stream_name,
479 codec_dai->playback.active ? "active" : "inactive",
480 codec_dai->pop_wait ? "yes" : "no");
482 /* are we waiting on this codec DAI stream */
483 if (codec_dai->pop_wait == 1) {
484 codec_dai->pop_wait = 0;
485 snd_soc_dapm_stream_event(codec,
486 codec_dai->playback.stream_name,
487 SND_SOC_DAPM_STREAM_STOP);
490 mutex_unlock(&pcm_mutex);
494 * Called by ALSA when a PCM substream is closed. Private data can be
495 * freed here. The cpu DAI, codec DAI, machine and platform are also
498 static int soc_codec_close(struct snd_pcm_substream *substream)
500 struct snd_soc_pcm_runtime *rtd = substream->private_data;
501 struct snd_soc_device *socdev = rtd->socdev;
502 struct snd_soc_card *card = socdev->card;
503 struct snd_soc_dai_link *machine = rtd->dai;
504 struct snd_soc_platform *platform = card->platform;
505 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
506 struct snd_soc_dai *codec_dai = machine->codec_dai;
507 struct snd_soc_codec *codec = card->codec;
509 mutex_lock(&pcm_mutex);
511 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
512 cpu_dai->playback.active = codec_dai->playback.active = 0;
514 cpu_dai->capture.active = codec_dai->capture.active = 0;
516 if (codec_dai->playback.active == 0 &&
517 codec_dai->capture.active == 0) {
518 cpu_dai->active = codec_dai->active = 0;
522 /* Muting the DAC suppresses artifacts caused during digital
523 * shutdown, for example from stopping clocks.
525 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
526 snd_soc_dai_digital_mute(codec_dai, 1);
528 if (cpu_dai->ops->shutdown)
529 cpu_dai->ops->shutdown(substream, cpu_dai);
531 if (codec_dai->ops->shutdown)
532 codec_dai->ops->shutdown(substream, codec_dai);
534 if (machine->ops && machine->ops->shutdown)
535 machine->ops->shutdown(substream);
537 if (platform->pcm_ops->close)
538 platform->pcm_ops->close(substream);
539 cpu_dai->runtime = NULL;
541 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
542 /* start delayed pop wq here for playback streams */
543 codec_dai->pop_wait = 1;
544 schedule_delayed_work(&card->delayed_work,
545 msecs_to_jiffies(pmdown_time));
547 /* capture streams can be powered down now */
548 snd_soc_dapm_stream_event(codec,
549 codec_dai->capture.stream_name,
550 SND_SOC_DAPM_STREAM_STOP);
553 mutex_unlock(&pcm_mutex);
558 * Called by ALSA when the PCM substream is prepared, can set format, sample
559 * rate, etc. This function is non atomic and can be called multiple times,
560 * it can refer to the runtime info.
562 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
564 struct snd_soc_pcm_runtime *rtd = substream->private_data;
565 struct snd_soc_device *socdev = rtd->socdev;
566 struct snd_soc_card *card = socdev->card;
567 struct snd_soc_dai_link *machine = rtd->dai;
568 struct snd_soc_platform *platform = card->platform;
569 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
570 struct snd_soc_dai *codec_dai = machine->codec_dai;
571 struct snd_soc_codec *codec = card->codec;
574 mutex_lock(&pcm_mutex);
576 if (machine->ops && machine->ops->prepare) {
577 ret = machine->ops->prepare(substream);
579 printk(KERN_ERR "asoc: machine prepare error\n");
584 if (platform->pcm_ops->prepare) {
585 ret = platform->pcm_ops->prepare(substream);
587 printk(KERN_ERR "asoc: platform prepare error\n");
592 if (codec_dai->ops->prepare) {
593 ret = codec_dai->ops->prepare(substream, codec_dai);
595 printk(KERN_ERR "asoc: codec DAI prepare error\n");
600 if (cpu_dai->ops->prepare) {
601 ret = cpu_dai->ops->prepare(substream, cpu_dai);
603 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
608 /* cancel any delayed stream shutdown that is pending */
609 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
610 codec_dai->pop_wait) {
611 codec_dai->pop_wait = 0;
612 cancel_delayed_work(&card->delayed_work);
615 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
616 snd_soc_dapm_stream_event(codec,
617 codec_dai->playback.stream_name,
618 SND_SOC_DAPM_STREAM_START);
620 snd_soc_dapm_stream_event(codec,
621 codec_dai->capture.stream_name,
622 SND_SOC_DAPM_STREAM_START);
624 snd_soc_dai_digital_mute(codec_dai, 0);
627 mutex_unlock(&pcm_mutex);
632 * Called by ALSA when the hardware params are set by application. This
633 * function can also be called multiple times and can allocate buffers
634 * (using snd_pcm_lib_* ). It's non-atomic.
636 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
637 struct snd_pcm_hw_params *params)
639 struct snd_soc_pcm_runtime *rtd = substream->private_data;
640 struct snd_soc_device *socdev = rtd->socdev;
641 struct snd_soc_dai_link *machine = rtd->dai;
642 struct snd_soc_card *card = socdev->card;
643 struct snd_soc_platform *platform = card->platform;
644 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
645 struct snd_soc_dai *codec_dai = machine->codec_dai;
648 mutex_lock(&pcm_mutex);
650 if (machine->ops && machine->ops->hw_params) {
651 ret = machine->ops->hw_params(substream, params);
653 printk(KERN_ERR "asoc: machine hw_params failed\n");
658 if (codec_dai->ops->hw_params) {
659 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
661 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
667 if (cpu_dai->ops->hw_params) {
668 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
670 printk(KERN_ERR "asoc: interface %s hw params failed\n",
676 if (platform->pcm_ops->hw_params) {
677 ret = platform->pcm_ops->hw_params(substream, params);
679 printk(KERN_ERR "asoc: platform %s hw params failed\n",
685 machine->rate = params_rate(params);
688 mutex_unlock(&pcm_mutex);
692 if (cpu_dai->ops->hw_free)
693 cpu_dai->ops->hw_free(substream, cpu_dai);
696 if (codec_dai->ops->hw_free)
697 codec_dai->ops->hw_free(substream, codec_dai);
700 if (machine->ops && machine->ops->hw_free)
701 machine->ops->hw_free(substream);
703 mutex_unlock(&pcm_mutex);
708 * Free's resources allocated by hw_params, can be called multiple times
710 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
712 struct snd_soc_pcm_runtime *rtd = substream->private_data;
713 struct snd_soc_device *socdev = rtd->socdev;
714 struct snd_soc_dai_link *machine = rtd->dai;
715 struct snd_soc_card *card = socdev->card;
716 struct snd_soc_platform *platform = card->platform;
717 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
718 struct snd_soc_dai *codec_dai = machine->codec_dai;
719 struct snd_soc_codec *codec = card->codec;
721 mutex_lock(&pcm_mutex);
723 /* apply codec digital mute */
725 snd_soc_dai_digital_mute(codec_dai, 1);
727 /* free any machine hw params */
728 if (machine->ops && machine->ops->hw_free)
729 machine->ops->hw_free(substream);
731 /* free any DMA resources */
732 if (platform->pcm_ops->hw_free)
733 platform->pcm_ops->hw_free(substream);
735 /* now free hw params for the DAI's */
736 if (codec_dai->ops->hw_free)
737 codec_dai->ops->hw_free(substream, codec_dai);
739 if (cpu_dai->ops->hw_free)
740 cpu_dai->ops->hw_free(substream, cpu_dai);
742 mutex_unlock(&pcm_mutex);
746 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
748 struct snd_soc_pcm_runtime *rtd = substream->private_data;
749 struct snd_soc_device *socdev = rtd->socdev;
750 struct snd_soc_card *card= socdev->card;
751 struct snd_soc_dai_link *machine = rtd->dai;
752 struct snd_soc_platform *platform = card->platform;
753 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
754 struct snd_soc_dai *codec_dai = machine->codec_dai;
757 if (codec_dai->ops->trigger) {
758 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
763 if (platform->pcm_ops->trigger) {
764 ret = platform->pcm_ops->trigger(substream, cmd);
769 if (cpu_dai->ops->trigger) {
770 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
777 /* ASoC PCM operations */
778 static struct snd_pcm_ops soc_pcm_ops = {
779 .open = soc_pcm_open,
780 .close = soc_codec_close,
781 .hw_params = soc_pcm_hw_params,
782 .hw_free = soc_pcm_hw_free,
783 .prepare = soc_pcm_prepare,
784 .trigger = soc_pcm_trigger,
788 /* powers down audio subsystem for suspend */
789 static int soc_suspend(struct device *dev)
791 struct platform_device *pdev = to_platform_device(dev);
792 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
793 struct snd_soc_card *card = socdev->card;
794 struct snd_soc_platform *platform = card->platform;
795 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
796 struct snd_soc_codec *codec = card->codec;
799 /* If the initialization of this soc device failed, there is no codec
800 * associated with it. Just bail out in this case.
805 /* Due to the resume being scheduled into a workqueue we could
806 * suspend before that's finished - wait for it to complete.
808 snd_power_lock(codec->card);
809 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
810 snd_power_unlock(codec->card);
812 /* we're going to block userspace touching us until resume completes */
813 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
815 /* mute any active DAC's */
816 for (i = 0; i < card->num_links; i++) {
817 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
818 if (dai->ops->digital_mute && dai->playback.active)
819 dai->ops->digital_mute(dai, 1);
822 /* suspend all pcms */
823 for (i = 0; i < card->num_links; i++)
824 snd_pcm_suspend_all(card->dai_link[i].pcm);
826 if (card->suspend_pre)
827 card->suspend_pre(pdev, PMSG_SUSPEND);
829 for (i = 0; i < card->num_links; i++) {
830 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
831 if (cpu_dai->suspend && !cpu_dai->ac97_control)
832 cpu_dai->suspend(cpu_dai);
833 if (platform->suspend)
834 platform->suspend(cpu_dai);
837 /* close any waiting streams and save state */
838 run_delayed_work(&card->delayed_work);
839 codec->suspend_bias_level = codec->bias_level;
841 for (i = 0; i < codec->num_dai; i++) {
842 char *stream = codec->dai[i].playback.stream_name;
844 snd_soc_dapm_stream_event(codec, stream,
845 SND_SOC_DAPM_STREAM_SUSPEND);
846 stream = codec->dai[i].capture.stream_name;
848 snd_soc_dapm_stream_event(codec, stream,
849 SND_SOC_DAPM_STREAM_SUSPEND);
852 if (codec_dev->suspend)
853 codec_dev->suspend(pdev, PMSG_SUSPEND);
855 for (i = 0; i < card->num_links; i++) {
856 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
857 if (cpu_dai->suspend && cpu_dai->ac97_control)
858 cpu_dai->suspend(cpu_dai);
861 if (card->suspend_post)
862 card->suspend_post(pdev, PMSG_SUSPEND);
867 /* deferred resume work, so resume can complete before we finished
868 * setting our codec back up, which can be very slow on I2C
870 static void soc_resume_deferred(struct work_struct *work)
872 struct snd_soc_card *card = container_of(work,
874 deferred_resume_work);
875 struct snd_soc_device *socdev = card->socdev;
876 struct snd_soc_platform *platform = card->platform;
877 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
878 struct snd_soc_codec *codec = card->codec;
879 struct platform_device *pdev = to_platform_device(socdev->dev);
882 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
883 * so userspace apps are blocked from touching us
886 dev_dbg(socdev->dev, "starting resume work\n");
888 if (card->resume_pre)
889 card->resume_pre(pdev);
891 for (i = 0; i < card->num_links; i++) {
892 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
893 if (cpu_dai->resume && cpu_dai->ac97_control)
894 cpu_dai->resume(cpu_dai);
897 if (codec_dev->resume)
898 codec_dev->resume(pdev);
900 for (i = 0; i < codec->num_dai; i++) {
901 char *stream = codec->dai[i].playback.stream_name;
903 snd_soc_dapm_stream_event(codec, stream,
904 SND_SOC_DAPM_STREAM_RESUME);
905 stream = codec->dai[i].capture.stream_name;
907 snd_soc_dapm_stream_event(codec, stream,
908 SND_SOC_DAPM_STREAM_RESUME);
911 /* unmute any active DACs */
912 for (i = 0; i < card->num_links; i++) {
913 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
914 if (dai->ops->digital_mute && dai->playback.active)
915 dai->ops->digital_mute(dai, 0);
918 for (i = 0; i < card->num_links; i++) {
919 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
920 if (cpu_dai->resume && !cpu_dai->ac97_control)
921 cpu_dai->resume(cpu_dai);
922 if (platform->resume)
923 platform->resume(cpu_dai);
926 if (card->resume_post)
927 card->resume_post(pdev);
929 dev_dbg(socdev->dev, "resume work completed\n");
931 /* userspace can access us now we are back as we were before */
932 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
935 /* powers up audio subsystem after a suspend */
936 static int soc_resume(struct device *dev)
938 struct platform_device *pdev = to_platform_device(dev);
939 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
940 struct snd_soc_card *card = socdev->card;
941 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
943 /* AC97 devices might have other drivers hanging off them so
944 * need to resume immediately. Other drivers don't have that
945 * problem and may take a substantial amount of time to resume
946 * due to I/O costs and anti-pop so handle them out of line.
948 if (cpu_dai->ac97_control) {
949 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
950 soc_resume_deferred(&card->deferred_resume_work);
952 dev_dbg(socdev->dev, "Scheduling resume work\n");
953 if (!schedule_work(&card->deferred_resume_work))
954 dev_err(socdev->dev, "resume work item may be lost\n");
960 #define soc_suspend NULL
961 #define soc_resume NULL
964 static struct snd_soc_dai_ops null_dai_ops = {
967 static void snd_soc_instantiate_card(struct snd_soc_card *card)
969 struct platform_device *pdev = container_of(card->dev,
970 struct platform_device,
972 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
973 struct snd_soc_platform *platform;
974 struct snd_soc_dai *dai;
975 int i, found, ret, ac97;
977 if (card->instantiated)
981 list_for_each_entry(platform, &platform_list, list)
982 if (card->platform == platform) {
987 dev_dbg(card->dev, "Platform %s not registered\n",
988 card->platform->name);
993 for (i = 0; i < card->num_links; i++) {
995 list_for_each_entry(dai, &dai_list, list)
996 if (card->dai_link[i].cpu_dai == dai) {
1001 dev_dbg(card->dev, "DAI %s not registered\n",
1002 card->dai_link[i].cpu_dai->name);
1006 if (card->dai_link[i].cpu_dai->ac97_control)
1010 for (i = 0; i < card->num_links; i++) {
1011 if (!card->dai_link[i].codec_dai->ops)
1012 card->dai_link[i].codec_dai->ops = &null_dai_ops;
1015 /* If we have AC97 in the system then don't wait for the
1016 * codec. This will need revisiting if we have to handle
1017 * systems with mixed AC97 and non-AC97 parts. Only check for
1018 * DAIs currently; we can't do this per link since some AC97
1019 * codecs have non-AC97 DAIs.
1022 for (i = 0; i < card->num_links; i++) {
1024 list_for_each_entry(dai, &dai_list, list)
1025 if (card->dai_link[i].codec_dai == dai) {
1030 dev_dbg(card->dev, "DAI %s not registered\n",
1031 card->dai_link[i].codec_dai->name);
1036 /* Note that we do not current check for codec components */
1038 dev_dbg(card->dev, "All components present, instantiating\n");
1040 /* Found everything, bring it up */
1042 ret = card->probe(pdev);
1047 for (i = 0; i < card->num_links; i++) {
1048 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1049 if (cpu_dai->probe) {
1050 ret = cpu_dai->probe(pdev, cpu_dai);
1056 if (codec_dev->probe) {
1057 ret = codec_dev->probe(pdev);
1062 if (platform->probe) {
1063 ret = platform->probe(pdev);
1068 /* DAPM stream work */
1069 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
1071 /* deferred resume work */
1072 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1075 card->instantiated = 1;
1080 if (codec_dev->remove)
1081 codec_dev->remove(pdev);
1084 for (i--; i >= 0; i--) {
1085 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1086 if (cpu_dai->remove)
1087 cpu_dai->remove(pdev, cpu_dai);
1095 * Attempt to initialise any uninitalised cards. Must be called with
1098 static void snd_soc_instantiate_cards(void)
1100 struct snd_soc_card *card;
1101 list_for_each_entry(card, &card_list, list)
1102 snd_soc_instantiate_card(card);
1105 /* probes a new socdev */
1106 static int soc_probe(struct platform_device *pdev)
1109 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1110 struct snd_soc_card *card = socdev->card;
1112 /* Bodge while we push things out of socdev */
1113 card->socdev = socdev;
1115 /* Bodge while we unpick instantiation */
1116 card->dev = &pdev->dev;
1117 ret = snd_soc_register_card(card);
1119 dev_err(&pdev->dev, "Failed to register card\n");
1126 /* removes a socdev */
1127 static int soc_remove(struct platform_device *pdev)
1130 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1131 struct snd_soc_card *card = socdev->card;
1132 struct snd_soc_platform *platform = card->platform;
1133 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1135 if (!card->instantiated)
1138 run_delayed_work(&card->delayed_work);
1140 if (platform->remove)
1141 platform->remove(pdev);
1143 if (codec_dev->remove)
1144 codec_dev->remove(pdev);
1146 for (i = 0; i < card->num_links; i++) {
1147 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1148 if (cpu_dai->remove)
1149 cpu_dai->remove(pdev, cpu_dai);
1155 snd_soc_unregister_card(card);
1160 static int soc_poweroff(struct device *dev)
1162 struct platform_device *pdev = to_platform_device(dev);
1163 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1164 struct snd_soc_card *card = socdev->card;
1166 if (!card->instantiated)
1169 /* Flush out pmdown_time work - we actually do want to run it
1170 * now, we're shutting down so no imminent restart. */
1171 run_delayed_work(&card->delayed_work);
1173 snd_soc_dapm_shutdown(socdev);
1178 static struct dev_pm_ops soc_pm_ops = {
1179 .suspend = soc_suspend,
1180 .resume = soc_resume,
1181 .poweroff = soc_poweroff,
1184 /* ASoC platform driver */
1185 static struct platform_driver soc_driver = {
1187 .name = "soc-audio",
1188 .owner = THIS_MODULE,
1192 .remove = soc_remove,
1195 /* create a new pcm */
1196 static int soc_new_pcm(struct snd_soc_device *socdev,
1197 struct snd_soc_dai_link *dai_link, int num)
1199 struct snd_soc_card *card = socdev->card;
1200 struct snd_soc_codec *codec = card->codec;
1201 struct snd_soc_platform *platform = card->platform;
1202 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1203 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1204 struct snd_soc_pcm_runtime *rtd;
1205 struct snd_pcm *pcm;
1207 int ret = 0, playback = 0, capture = 0;
1209 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1213 rtd->dai = dai_link;
1214 rtd->socdev = socdev;
1215 codec_dai->codec = card->codec;
1217 /* check client and interface hw capabilities */
1218 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
1221 if (codec_dai->playback.channels_min)
1223 if (codec_dai->capture.channels_min)
1226 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1229 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1235 dai_link->pcm = pcm;
1236 pcm->private_data = rtd;
1237 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1238 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1239 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1240 soc_pcm_ops.copy = platform->pcm_ops->copy;
1241 soc_pcm_ops.silence = platform->pcm_ops->silence;
1242 soc_pcm_ops.ack = platform->pcm_ops->ack;
1243 soc_pcm_ops.page = platform->pcm_ops->page;
1246 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1249 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1251 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1253 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1258 pcm->private_free = platform->pcm_free;
1259 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1265 * snd_soc_codec_volatile_register: Report if a register is volatile.
1267 * @codec: CODEC to query.
1268 * @reg: Register to query.
1270 * Boolean function indiciating if a CODEC register is volatile.
1272 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1274 if (codec->volatile_register)
1275 return codec->volatile_register(reg);
1279 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1282 * snd_soc_new_ac97_codec - initailise AC97 device
1283 * @codec: audio codec
1284 * @ops: AC97 bus operations
1285 * @num: AC97 codec number
1287 * Initialises AC97 codec resources for use by ad-hoc devices only.
1289 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1290 struct snd_ac97_bus_ops *ops, int num)
1292 mutex_lock(&codec->mutex);
1294 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1295 if (codec->ac97 == NULL) {
1296 mutex_unlock(&codec->mutex);
1300 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1301 if (codec->ac97->bus == NULL) {
1304 mutex_unlock(&codec->mutex);
1308 codec->ac97->bus->ops = ops;
1309 codec->ac97->num = num;
1310 mutex_unlock(&codec->mutex);
1313 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1316 * snd_soc_free_ac97_codec - free AC97 codec device
1317 * @codec: audio codec
1319 * Frees AC97 codec device resources.
1321 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1323 mutex_lock(&codec->mutex);
1324 kfree(codec->ac97->bus);
1327 mutex_unlock(&codec->mutex);
1329 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1332 * snd_soc_update_bits - update codec register bits
1333 * @codec: audio codec
1334 * @reg: codec register
1335 * @mask: register mask
1338 * Writes new register value.
1340 * Returns 1 for change else 0.
1342 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1343 unsigned int mask, unsigned int value)
1346 unsigned int old, new;
1348 old = snd_soc_read(codec, reg);
1349 new = (old & ~mask) | value;
1350 change = old != new;
1352 snd_soc_write(codec, reg, new);
1356 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1359 * snd_soc_update_bits_locked - update codec register bits
1360 * @codec: audio codec
1361 * @reg: codec register
1362 * @mask: register mask
1365 * Writes new register value, and takes the codec mutex.
1367 * Returns 1 for change else 0.
1369 static int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1370 unsigned short reg, unsigned int mask,
1375 mutex_lock(&codec->mutex);
1376 change = snd_soc_update_bits(codec, reg, mask, value);
1377 mutex_unlock(&codec->mutex);
1383 * snd_soc_test_bits - test register for change
1384 * @codec: audio codec
1385 * @reg: codec register
1386 * @mask: register mask
1389 * Tests a register with a new value and checks if the new value is
1390 * different from the old value.
1392 * Returns 1 for change else 0.
1394 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1395 unsigned int mask, unsigned int value)
1398 unsigned int old, new;
1400 old = snd_soc_read(codec, reg);
1401 new = (old & ~mask) | value;
1402 change = old != new;
1406 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1409 * snd_soc_new_pcms - create new sound card and pcms
1410 * @socdev: the SoC audio device
1411 * @idx: ALSA card index
1412 * @xid: card identification
1414 * Create a new sound card based upon the codec and interface pcms.
1416 * Returns 0 for success, else error.
1418 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1420 struct snd_soc_card *card = socdev->card;
1421 struct snd_soc_codec *codec = card->codec;
1424 mutex_lock(&codec->mutex);
1426 /* register a sound card */
1427 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1429 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1431 mutex_unlock(&codec->mutex);
1435 codec->socdev = socdev;
1436 codec->card->dev = socdev->dev;
1437 codec->card->private_data = codec;
1438 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1440 /* create the pcms */
1441 for (i = 0; i < card->num_links; i++) {
1442 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1444 printk(KERN_ERR "asoc: can't create pcm %s\n",
1445 card->dai_link[i].stream_name);
1446 mutex_unlock(&codec->mutex);
1451 mutex_unlock(&codec->mutex);
1454 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1457 * snd_soc_init_card - register sound card
1458 * @socdev: the SoC audio device
1460 * Register a SoC sound card. Also registers an AC97 device if the
1461 * codec is AC97 for ad hoc devices.
1463 * Returns 0 for success, else error.
1465 int snd_soc_init_card(struct snd_soc_device *socdev)
1467 struct snd_soc_card *card = socdev->card;
1468 struct snd_soc_codec *codec = card->codec;
1469 int ret = 0, i, ac97 = 0, err = 0;
1471 for (i = 0; i < card->num_links; i++) {
1472 if (card->dai_link[i].init) {
1473 err = card->dai_link[i].init(codec);
1475 printk(KERN_ERR "asoc: failed to init %s\n",
1476 card->dai_link[i].stream_name);
1480 if (card->dai_link[i].codec_dai->ac97_control) {
1482 snd_ac97_dev_add_pdata(codec->ac97,
1483 card->dai_link[i].cpu_dai->ac97_pdata);
1486 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1488 snprintf(codec->card->longname, sizeof(codec->card->longname),
1489 "%s (%s)", card->name, codec->name);
1491 /* Make sure all DAPM widgets are instantiated */
1492 snd_soc_dapm_new_widgets(codec);
1494 ret = snd_card_register(codec->card);
1496 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1501 mutex_lock(&codec->mutex);
1502 #ifdef CONFIG_SND_SOC_AC97_BUS
1503 /* Only instantiate AC97 if not already done by the adaptor
1504 * for the generic AC97 subsystem.
1506 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1507 ret = soc_ac97_dev_register(codec);
1509 printk(KERN_ERR "asoc: AC97 device register failed\n");
1510 snd_card_free(codec->card);
1511 mutex_unlock(&codec->mutex);
1517 err = snd_soc_dapm_sys_add(socdev->dev);
1519 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1521 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1523 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1525 soc_init_codec_debugfs(codec);
1526 mutex_unlock(&codec->mutex);
1531 EXPORT_SYMBOL_GPL(snd_soc_init_card);
1534 * snd_soc_free_pcms - free sound card and pcms
1535 * @socdev: the SoC audio device
1537 * Frees sound card and pcms associated with the socdev.
1538 * Also unregister the codec if it is an AC97 device.
1540 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1542 struct snd_soc_codec *codec = socdev->card->codec;
1543 #ifdef CONFIG_SND_SOC_AC97_BUS
1544 struct snd_soc_dai *codec_dai;
1548 mutex_lock(&codec->mutex);
1549 soc_cleanup_codec_debugfs(codec);
1550 #ifdef CONFIG_SND_SOC_AC97_BUS
1551 for (i = 0; i < codec->num_dai; i++) {
1552 codec_dai = &codec->dai[i];
1553 if (codec_dai->ac97_control && codec->ac97 &&
1554 strcmp(codec->name, "AC97") != 0) {
1555 soc_ac97_dev_unregister(codec);
1563 snd_card_free(codec->card);
1564 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1565 mutex_unlock(&codec->mutex);
1567 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1570 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1571 * @substream: the pcm substream
1572 * @hw: the hardware parameters
1574 * Sets the substream runtime hardware parameters.
1576 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1577 const struct snd_pcm_hardware *hw)
1579 struct snd_pcm_runtime *runtime = substream->runtime;
1580 runtime->hw.info = hw->info;
1581 runtime->hw.formats = hw->formats;
1582 runtime->hw.period_bytes_min = hw->period_bytes_min;
1583 runtime->hw.period_bytes_max = hw->period_bytes_max;
1584 runtime->hw.periods_min = hw->periods_min;
1585 runtime->hw.periods_max = hw->periods_max;
1586 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1587 runtime->hw.fifo_size = hw->fifo_size;
1590 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1593 * snd_soc_cnew - create new control
1594 * @_template: control template
1595 * @data: control private data
1596 * @long_name: control long name
1598 * Create a new mixer control from a template control.
1600 * Returns 0 for success, else error.
1602 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1603 void *data, char *long_name)
1605 struct snd_kcontrol_new template;
1607 memcpy(&template, _template, sizeof(template));
1609 template.name = long_name;
1612 return snd_ctl_new1(&template, data);
1614 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1617 * snd_soc_add_controls - add an array of controls to a codec.
1618 * Convienience function to add a list of controls. Many codecs were
1619 * duplicating this code.
1621 * @codec: codec to add controls to
1622 * @controls: array of controls to add
1623 * @num_controls: number of elements in the array
1625 * Return 0 for success, else error.
1627 int snd_soc_add_controls(struct snd_soc_codec *codec,
1628 const struct snd_kcontrol_new *controls, int num_controls)
1630 struct snd_card *card = codec->card;
1633 for (i = 0; i < num_controls; i++) {
1634 const struct snd_kcontrol_new *control = &controls[i];
1635 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1637 dev_err(codec->dev, "%s: Failed to add %s\n",
1638 codec->name, control->name);
1645 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1648 * snd_soc_info_enum_double - enumerated double mixer info callback
1649 * @kcontrol: mixer control
1650 * @uinfo: control element information
1652 * Callback to provide information about a double enumerated
1655 * Returns 0 for success.
1657 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1658 struct snd_ctl_elem_info *uinfo)
1660 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1662 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1663 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1664 uinfo->value.enumerated.items = e->max;
1666 if (uinfo->value.enumerated.item > e->max - 1)
1667 uinfo->value.enumerated.item = e->max - 1;
1668 strcpy(uinfo->value.enumerated.name,
1669 e->texts[uinfo->value.enumerated.item]);
1672 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1675 * snd_soc_get_enum_double - enumerated double mixer get callback
1676 * @kcontrol: mixer control
1677 * @ucontrol: control element information
1679 * Callback to get the value of a double enumerated mixer.
1681 * Returns 0 for success.
1683 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1684 struct snd_ctl_elem_value *ucontrol)
1686 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1687 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1688 unsigned int val, bitmask;
1690 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1692 val = snd_soc_read(codec, e->reg);
1693 ucontrol->value.enumerated.item[0]
1694 = (val >> e->shift_l) & (bitmask - 1);
1695 if (e->shift_l != e->shift_r)
1696 ucontrol->value.enumerated.item[1] =
1697 (val >> e->shift_r) & (bitmask - 1);
1701 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1704 * snd_soc_put_enum_double - enumerated double mixer put callback
1705 * @kcontrol: mixer control
1706 * @ucontrol: control element information
1708 * Callback to set the value of a double enumerated mixer.
1710 * Returns 0 for success.
1712 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1713 struct snd_ctl_elem_value *ucontrol)
1715 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1716 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1718 unsigned int mask, bitmask;
1720 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1722 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1724 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1725 mask = (bitmask - 1) << e->shift_l;
1726 if (e->shift_l != e->shift_r) {
1727 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1729 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1730 mask |= (bitmask - 1) << e->shift_r;
1733 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1735 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1738 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1739 * @kcontrol: mixer control
1740 * @ucontrol: control element information
1742 * Callback to get the value of a double semi enumerated mixer.
1744 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1745 * used for handling bitfield coded enumeration for example.
1747 * Returns 0 for success.
1749 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1750 struct snd_ctl_elem_value *ucontrol)
1752 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1753 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1754 unsigned int reg_val, val, mux;
1756 reg_val = snd_soc_read(codec, e->reg);
1757 val = (reg_val >> e->shift_l) & e->mask;
1758 for (mux = 0; mux < e->max; mux++) {
1759 if (val == e->values[mux])
1762 ucontrol->value.enumerated.item[0] = mux;
1763 if (e->shift_l != e->shift_r) {
1764 val = (reg_val >> e->shift_r) & e->mask;
1765 for (mux = 0; mux < e->max; mux++) {
1766 if (val == e->values[mux])
1769 ucontrol->value.enumerated.item[1] = mux;
1774 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1777 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1778 * @kcontrol: mixer control
1779 * @ucontrol: control element information
1781 * Callback to set the value of a double semi enumerated mixer.
1783 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1784 * used for handling bitfield coded enumeration for example.
1786 * Returns 0 for success.
1788 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1789 struct snd_ctl_elem_value *ucontrol)
1791 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1792 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1796 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1798 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1799 mask = e->mask << e->shift_l;
1800 if (e->shift_l != e->shift_r) {
1801 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1803 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1804 mask |= e->mask << e->shift_r;
1807 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1809 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1812 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1813 * @kcontrol: mixer control
1814 * @uinfo: control element information
1816 * Callback to provide information about an external enumerated
1819 * Returns 0 for success.
1821 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1822 struct snd_ctl_elem_info *uinfo)
1824 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1826 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1828 uinfo->value.enumerated.items = e->max;
1830 if (uinfo->value.enumerated.item > e->max - 1)
1831 uinfo->value.enumerated.item = e->max - 1;
1832 strcpy(uinfo->value.enumerated.name,
1833 e->texts[uinfo->value.enumerated.item]);
1836 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1839 * snd_soc_info_volsw_ext - external single mixer info callback
1840 * @kcontrol: mixer control
1841 * @uinfo: control element information
1843 * Callback to provide information about a single external mixer control.
1845 * Returns 0 for success.
1847 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1848 struct snd_ctl_elem_info *uinfo)
1850 int max = kcontrol->private_value;
1852 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1853 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1855 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1858 uinfo->value.integer.min = 0;
1859 uinfo->value.integer.max = max;
1862 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1865 * snd_soc_info_volsw - single mixer info callback
1866 * @kcontrol: mixer control
1867 * @uinfo: control element information
1869 * Callback to provide information about a single mixer control.
1871 * Returns 0 for success.
1873 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1874 struct snd_ctl_elem_info *uinfo)
1876 struct soc_mixer_control *mc =
1877 (struct soc_mixer_control *)kcontrol->private_value;
1879 unsigned int shift = mc->shift;
1880 unsigned int rshift = mc->rshift;
1882 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1883 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1885 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1887 uinfo->count = shift == rshift ? 1 : 2;
1888 uinfo->value.integer.min = 0;
1889 uinfo->value.integer.max = max;
1892 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1895 * snd_soc_get_volsw - single mixer get callback
1896 * @kcontrol: mixer control
1897 * @ucontrol: control element information
1899 * Callback to get the value of a single mixer control.
1901 * Returns 0 for success.
1903 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1904 struct snd_ctl_elem_value *ucontrol)
1906 struct soc_mixer_control *mc =
1907 (struct soc_mixer_control *)kcontrol->private_value;
1908 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1909 unsigned int reg = mc->reg;
1910 unsigned int shift = mc->shift;
1911 unsigned int rshift = mc->rshift;
1913 unsigned int mask = (1 << fls(max)) - 1;
1914 unsigned int invert = mc->invert;
1916 ucontrol->value.integer.value[0] =
1917 (snd_soc_read(codec, reg) >> shift) & mask;
1918 if (shift != rshift)
1919 ucontrol->value.integer.value[1] =
1920 (snd_soc_read(codec, reg) >> rshift) & mask;
1922 ucontrol->value.integer.value[0] =
1923 max - ucontrol->value.integer.value[0];
1924 if (shift != rshift)
1925 ucontrol->value.integer.value[1] =
1926 max - ucontrol->value.integer.value[1];
1931 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1934 * snd_soc_put_volsw - single mixer put callback
1935 * @kcontrol: mixer control
1936 * @ucontrol: control element information
1938 * Callback to set the value of a single mixer control.
1940 * Returns 0 for success.
1942 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1943 struct snd_ctl_elem_value *ucontrol)
1945 struct soc_mixer_control *mc =
1946 (struct soc_mixer_control *)kcontrol->private_value;
1947 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1948 unsigned int reg = mc->reg;
1949 unsigned int shift = mc->shift;
1950 unsigned int rshift = mc->rshift;
1952 unsigned int mask = (1 << fls(max)) - 1;
1953 unsigned int invert = mc->invert;
1954 unsigned int val, val2, val_mask;
1956 val = (ucontrol->value.integer.value[0] & mask);
1959 val_mask = mask << shift;
1961 if (shift != rshift) {
1962 val2 = (ucontrol->value.integer.value[1] & mask);
1965 val_mask |= mask << rshift;
1966 val |= val2 << rshift;
1968 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
1970 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1973 * snd_soc_info_volsw_2r - double mixer info callback
1974 * @kcontrol: mixer control
1975 * @uinfo: control element information
1977 * Callback to provide information about a double mixer control that
1978 * spans 2 codec registers.
1980 * Returns 0 for success.
1982 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1983 struct snd_ctl_elem_info *uinfo)
1985 struct soc_mixer_control *mc =
1986 (struct soc_mixer_control *)kcontrol->private_value;
1989 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1990 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1992 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1995 uinfo->value.integer.min = 0;
1996 uinfo->value.integer.max = max;
1999 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2002 * snd_soc_get_volsw_2r - double mixer get callback
2003 * @kcontrol: mixer control
2004 * @ucontrol: control element information
2006 * Callback to get the value of a double mixer control that spans 2 registers.
2008 * Returns 0 for success.
2010 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2011 struct snd_ctl_elem_value *ucontrol)
2013 struct soc_mixer_control *mc =
2014 (struct soc_mixer_control *)kcontrol->private_value;
2015 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2016 unsigned int reg = mc->reg;
2017 unsigned int reg2 = mc->rreg;
2018 unsigned int shift = mc->shift;
2020 unsigned int mask = (1 << fls(max)) - 1;
2021 unsigned int invert = mc->invert;
2023 ucontrol->value.integer.value[0] =
2024 (snd_soc_read(codec, reg) >> shift) & mask;
2025 ucontrol->value.integer.value[1] =
2026 (snd_soc_read(codec, reg2) >> shift) & mask;
2028 ucontrol->value.integer.value[0] =
2029 max - ucontrol->value.integer.value[0];
2030 ucontrol->value.integer.value[1] =
2031 max - ucontrol->value.integer.value[1];
2036 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2039 * snd_soc_put_volsw_2r - double mixer set callback
2040 * @kcontrol: mixer control
2041 * @ucontrol: control element information
2043 * Callback to set the value of a double mixer control that spans 2 registers.
2045 * Returns 0 for success.
2047 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2048 struct snd_ctl_elem_value *ucontrol)
2050 struct soc_mixer_control *mc =
2051 (struct soc_mixer_control *)kcontrol->private_value;
2052 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2053 unsigned int reg = mc->reg;
2054 unsigned int reg2 = mc->rreg;
2055 unsigned int shift = mc->shift;
2057 unsigned int mask = (1 << fls(max)) - 1;
2058 unsigned int invert = mc->invert;
2060 unsigned int val, val2, val_mask;
2062 val_mask = mask << shift;
2063 val = (ucontrol->value.integer.value[0] & mask);
2064 val2 = (ucontrol->value.integer.value[1] & mask);
2072 val2 = val2 << shift;
2074 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2078 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2081 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2084 * snd_soc_info_volsw_s8 - signed mixer info callback
2085 * @kcontrol: mixer control
2086 * @uinfo: control element information
2088 * Callback to provide information about a signed mixer control.
2090 * Returns 0 for success.
2092 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2093 struct snd_ctl_elem_info *uinfo)
2095 struct soc_mixer_control *mc =
2096 (struct soc_mixer_control *)kcontrol->private_value;
2100 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2102 uinfo->value.integer.min = 0;
2103 uinfo->value.integer.max = max-min;
2106 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2109 * snd_soc_get_volsw_s8 - signed mixer get callback
2110 * @kcontrol: mixer control
2111 * @ucontrol: control element information
2113 * Callback to get the value of a signed mixer control.
2115 * Returns 0 for success.
2117 int snd_soc_get_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;
2125 int val = snd_soc_read(codec, reg);
2127 ucontrol->value.integer.value[0] =
2128 ((signed char)(val & 0xff))-min;
2129 ucontrol->value.integer.value[1] =
2130 ((signed char)((val >> 8) & 0xff))-min;
2133 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2136 * snd_soc_put_volsw_sgn - signed mixer put callback
2137 * @kcontrol: mixer control
2138 * @ucontrol: control element information
2140 * Callback to set the value of a signed mixer control.
2142 * Returns 0 for success.
2144 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2145 struct snd_ctl_elem_value *ucontrol)
2147 struct soc_mixer_control *mc =
2148 (struct soc_mixer_control *)kcontrol->private_value;
2149 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2150 unsigned int reg = mc->reg;
2154 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2155 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2157 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2159 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2162 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2164 * @clk_id: DAI specific clock ID
2165 * @freq: new clock frequency in Hz
2166 * @dir: new clock direction - input/output.
2168 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2170 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2171 unsigned int freq, int dir)
2173 if (dai->ops && dai->ops->set_sysclk)
2174 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2178 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2181 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2183 * @div_id: DAI specific clock divider ID
2184 * @div: new clock divisor.
2186 * Configures the clock dividers. This is used to derive the best DAI bit and
2187 * frame clocks from the system or master clock. It's best to set the DAI bit
2188 * and frame clocks as low as possible to save system power.
2190 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2191 int div_id, int div)
2193 if (dai->ops && dai->ops->set_clkdiv)
2194 return dai->ops->set_clkdiv(dai, div_id, div);
2198 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2201 * snd_soc_dai_set_pll - configure DAI PLL.
2203 * @pll_id: DAI specific PLL ID
2204 * @source: DAI specific source for the PLL
2205 * @freq_in: PLL input clock frequency in Hz
2206 * @freq_out: requested PLL output clock frequency in Hz
2208 * Configures and enables PLL to generate output clock based on input clock.
2210 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2211 unsigned int freq_in, unsigned int freq_out)
2213 if (dai->ops && dai->ops->set_pll)
2214 return dai->ops->set_pll(dai, pll_id, source,
2219 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2222 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2224 * @fmt: SND_SOC_DAIFMT_ format value.
2226 * Configures the DAI hardware format and clocking.
2228 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2230 if (dai->ops && dai->ops->set_fmt)
2231 return dai->ops->set_fmt(dai, fmt);
2235 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2238 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2240 * @tx_mask: bitmask representing active TX slots.
2241 * @rx_mask: bitmask representing active RX slots.
2242 * @slots: Number of slots in use.
2243 * @slot_width: Width in bits for each slot.
2245 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2248 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2249 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2251 if (dai->ops && dai->ops->set_tdm_slot)
2252 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2257 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2260 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2262 * @tx_num: how many TX channels
2263 * @tx_slot: pointer to an array which imply the TX slot number channel
2265 * @rx_num: how many RX channels
2266 * @rx_slot: pointer to an array which imply the RX slot number channel
2269 * configure the relationship between channel number and TDM slot number.
2271 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2272 unsigned int tx_num, unsigned int *tx_slot,
2273 unsigned int rx_num, unsigned int *rx_slot)
2275 if (dai->ops && dai->ops->set_channel_map)
2276 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2281 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2284 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2286 * @tristate: tristate enable
2288 * Tristates the DAI so that others can use it.
2290 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2292 if (dai->ops && dai->ops->set_tristate)
2293 return dai->ops->set_tristate(dai, tristate);
2297 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2300 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2302 * @mute: mute enable
2304 * Mutes the DAI DAC.
2306 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2308 if (dai->ops && dai->ops->digital_mute)
2309 return dai->ops->digital_mute(dai, mute);
2313 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2316 * snd_soc_register_card - Register a card with the ASoC core
2318 * @card: Card to register
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_register_card(struct snd_soc_card *card)
2326 if (!card->name || !card->dev)
2329 INIT_LIST_HEAD(&card->list);
2330 card->instantiated = 0;
2332 mutex_lock(&client_mutex);
2333 list_add(&card->list, &card_list);
2334 snd_soc_instantiate_cards();
2335 mutex_unlock(&client_mutex);
2337 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2343 * snd_soc_unregister_card - Unregister a card with the ASoC core
2345 * @card: Card to unregister
2347 * Note that currently this is an internal only function: it will be
2348 * exposed to machine drivers after further backporting of ASoC v2
2349 * registration APIs.
2351 static int snd_soc_unregister_card(struct snd_soc_card *card)
2353 mutex_lock(&client_mutex);
2354 list_del(&card->list);
2355 mutex_unlock(&client_mutex);
2357 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2363 * snd_soc_register_dai - Register a DAI with the ASoC core
2365 * @dai: DAI to register
2367 int snd_soc_register_dai(struct snd_soc_dai *dai)
2372 /* The device should become mandatory over time */
2374 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2377 dai->ops = &null_dai_ops;
2379 INIT_LIST_HEAD(&dai->list);
2381 mutex_lock(&client_mutex);
2382 list_add(&dai->list, &dai_list);
2383 snd_soc_instantiate_cards();
2384 mutex_unlock(&client_mutex);
2386 pr_debug("Registered DAI '%s'\n", dai->name);
2390 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2393 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2395 * @dai: DAI to unregister
2397 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2399 mutex_lock(&client_mutex);
2400 list_del(&dai->list);
2401 mutex_unlock(&client_mutex);
2403 pr_debug("Unregistered DAI '%s'\n", dai->name);
2405 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2408 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2410 * @dai: Array of DAIs to register
2411 * @count: Number of DAIs
2413 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2417 for (i = 0; i < count; i++) {
2418 ret = snd_soc_register_dai(&dai[i]);
2426 for (i--; i >= 0; i--)
2427 snd_soc_unregister_dai(&dai[i]);
2431 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2434 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2436 * @dai: Array of DAIs to unregister
2437 * @count: Number of DAIs
2439 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2443 for (i = 0; i < count; i++)
2444 snd_soc_unregister_dai(&dai[i]);
2446 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2449 * snd_soc_register_platform - Register a platform with the ASoC core
2451 * @platform: platform to register
2453 int snd_soc_register_platform(struct snd_soc_platform *platform)
2455 if (!platform->name)
2458 INIT_LIST_HEAD(&platform->list);
2460 mutex_lock(&client_mutex);
2461 list_add(&platform->list, &platform_list);
2462 snd_soc_instantiate_cards();
2463 mutex_unlock(&client_mutex);
2465 pr_debug("Registered platform '%s'\n", platform->name);
2469 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2472 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2474 * @platform: platform to unregister
2476 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2478 mutex_lock(&client_mutex);
2479 list_del(&platform->list);
2480 mutex_unlock(&client_mutex);
2482 pr_debug("Unregistered platform '%s'\n", platform->name);
2484 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2486 static u64 codec_format_map[] = {
2487 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2488 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2489 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2490 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2491 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2492 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2493 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2494 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2495 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2496 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2497 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2498 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2499 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2500 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2501 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2502 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2505 /* Fix up the DAI formats for endianness: codecs don't actually see
2506 * the endianness of the data but we're using the CPU format
2507 * definitions which do need to include endianness so we ensure that
2508 * codec DAIs always have both big and little endian variants set.
2510 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2514 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2515 if (stream->formats & codec_format_map[i])
2516 stream->formats |= codec_format_map[i];
2520 * snd_soc_register_codec - Register a codec with the ASoC core
2522 * @codec: codec to register
2524 int snd_soc_register_codec(struct snd_soc_codec *codec)
2531 /* The device should become mandatory over time */
2533 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2535 INIT_LIST_HEAD(&codec->list);
2537 for (i = 0; i < codec->num_dai; i++) {
2538 fixup_codec_formats(&codec->dai[i].playback);
2539 fixup_codec_formats(&codec->dai[i].capture);
2542 mutex_lock(&client_mutex);
2543 list_add(&codec->list, &codec_list);
2544 snd_soc_instantiate_cards();
2545 mutex_unlock(&client_mutex);
2547 pr_debug("Registered codec '%s'\n", codec->name);
2551 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2554 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2556 * @codec: codec to unregister
2558 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2560 mutex_lock(&client_mutex);
2561 list_del(&codec->list);
2562 mutex_unlock(&client_mutex);
2564 pr_debug("Unregistered codec '%s'\n", codec->name);
2566 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2568 static int __init snd_soc_init(void)
2570 #ifdef CONFIG_DEBUG_FS
2571 debugfs_root = debugfs_create_dir("asoc", NULL);
2572 if (IS_ERR(debugfs_root) || !debugfs_root) {
2574 "ASoC: Failed to create debugfs directory\n");
2575 debugfs_root = NULL;
2579 return platform_driver_register(&soc_driver);
2582 static void __exit snd_soc_exit(void)
2584 #ifdef CONFIG_DEBUG_FS
2585 debugfs_remove_recursive(debugfs_root);
2587 platform_driver_unregister(&soc_driver);
2590 module_init(snd_soc_init);
2591 module_exit(snd_soc_exit);
2593 /* Module information */
2594 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2595 MODULE_DESCRIPTION("ALSA SoC Core");
2596 MODULE_LICENSE("GPL");
2597 MODULE_ALIAS("platform:soc-audio");