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_codec *codec;
974 struct snd_soc_platform *platform;
975 struct snd_soc_dai *dai;
976 int i, found, ret, ac97;
978 if (card->instantiated)
982 list_for_each_entry(platform, &platform_list, list)
983 if (card->platform == platform) {
988 dev_dbg(card->dev, "Platform %s not registered\n",
989 card->platform->name);
994 for (i = 0; i < card->num_links; i++) {
996 list_for_each_entry(dai, &dai_list, list)
997 if (card->dai_link[i].cpu_dai == dai) {
1002 dev_dbg(card->dev, "DAI %s not registered\n",
1003 card->dai_link[i].cpu_dai->name);
1007 if (card->dai_link[i].cpu_dai->ac97_control)
1011 for (i = 0; i < card->num_links; i++) {
1012 if (!card->dai_link[i].codec_dai->ops)
1013 card->dai_link[i].codec_dai->ops = &null_dai_ops;
1016 /* If we have AC97 in the system then don't wait for the
1017 * codec. This will need revisiting if we have to handle
1018 * systems with mixed AC97 and non-AC97 parts. Only check for
1019 * DAIs currently; we can't do this per link since some AC97
1020 * codecs have non-AC97 DAIs.
1023 for (i = 0; i < card->num_links; i++) {
1025 list_for_each_entry(dai, &dai_list, list)
1026 if (card->dai_link[i].codec_dai == dai) {
1031 dev_dbg(card->dev, "DAI %s not registered\n",
1032 card->dai_link[i].codec_dai->name);
1037 /* Note that we do not current check for codec components */
1039 dev_dbg(card->dev, "All components present, instantiating\n");
1041 /* Found everything, bring it up */
1043 ret = card->probe(pdev);
1048 for (i = 0; i < card->num_links; i++) {
1049 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1050 if (cpu_dai->probe) {
1051 ret = cpu_dai->probe(pdev, cpu_dai);
1057 if (codec_dev->probe) {
1058 ret = codec_dev->probe(pdev);
1062 codec = card->codec;
1064 if (platform->probe) {
1065 ret = platform->probe(pdev);
1070 /* DAPM stream work */
1071 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
1073 /* deferred resume work */
1074 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1077 for (i = 0; i < card->num_links; i++) {
1078 if (card->dai_link[i].init) {
1079 ret = card->dai_link[i].init(codec);
1081 printk(KERN_ERR "asoc: failed to init %s\n",
1082 card->dai_link[i].stream_name);
1086 if (card->dai_link[i].codec_dai->ac97_control) {
1088 snd_ac97_dev_add_pdata(codec->ac97,
1089 card->dai_link[i].cpu_dai->ac97_pdata);
1093 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1095 snprintf(codec->card->longname, sizeof(codec->card->longname),
1096 "%s (%s)", card->name, codec->name);
1098 /* Make sure all DAPM widgets are instantiated */
1099 snd_soc_dapm_new_widgets(codec);
1101 ret = snd_card_register(codec->card);
1103 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1108 mutex_lock(&codec->mutex);
1109 #ifdef CONFIG_SND_SOC_AC97_BUS
1110 /* Only instantiate AC97 if not already done by the adaptor
1111 * for the generic AC97 subsystem.
1113 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1114 ret = soc_ac97_dev_register(codec);
1116 printk(KERN_ERR "asoc: AC97 device register failed\n");
1117 snd_card_free(codec->card);
1118 mutex_unlock(&codec->mutex);
1124 ret = snd_soc_dapm_sys_add(card->socdev->dev);
1126 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1128 ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
1130 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1132 soc_init_codec_debugfs(codec);
1133 mutex_unlock(&codec->mutex);
1135 card->instantiated = 1;
1140 if (platform->remove)
1141 platform->remove(pdev);
1144 if (codec_dev->remove)
1145 codec_dev->remove(pdev);
1148 for (i--; i >= 0; i--) {
1149 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1150 if (cpu_dai->remove)
1151 cpu_dai->remove(pdev, cpu_dai);
1159 * Attempt to initialise any uninitalised cards. Must be called with
1162 static void snd_soc_instantiate_cards(void)
1164 struct snd_soc_card *card;
1165 list_for_each_entry(card, &card_list, list)
1166 snd_soc_instantiate_card(card);
1169 /* probes a new socdev */
1170 static int soc_probe(struct platform_device *pdev)
1173 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1174 struct snd_soc_card *card = socdev->card;
1176 /* Bodge while we push things out of socdev */
1177 card->socdev = socdev;
1179 /* Bodge while we unpick instantiation */
1180 card->dev = &pdev->dev;
1181 ret = snd_soc_register_card(card);
1183 dev_err(&pdev->dev, "Failed to register card\n");
1190 /* removes a socdev */
1191 static int soc_remove(struct platform_device *pdev)
1194 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1195 struct snd_soc_card *card = socdev->card;
1196 struct snd_soc_platform *platform = card->platform;
1197 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1199 if (!card->instantiated)
1202 run_delayed_work(&card->delayed_work);
1204 if (platform->remove)
1205 platform->remove(pdev);
1207 if (codec_dev->remove)
1208 codec_dev->remove(pdev);
1210 for (i = 0; i < card->num_links; i++) {
1211 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1212 if (cpu_dai->remove)
1213 cpu_dai->remove(pdev, cpu_dai);
1219 snd_soc_unregister_card(card);
1224 static int soc_poweroff(struct device *dev)
1226 struct platform_device *pdev = to_platform_device(dev);
1227 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1228 struct snd_soc_card *card = socdev->card;
1230 if (!card->instantiated)
1233 /* Flush out pmdown_time work - we actually do want to run it
1234 * now, we're shutting down so no imminent restart. */
1235 run_delayed_work(&card->delayed_work);
1237 snd_soc_dapm_shutdown(socdev);
1242 static struct dev_pm_ops soc_pm_ops = {
1243 .suspend = soc_suspend,
1244 .resume = soc_resume,
1245 .poweroff = soc_poweroff,
1248 /* ASoC platform driver */
1249 static struct platform_driver soc_driver = {
1251 .name = "soc-audio",
1252 .owner = THIS_MODULE,
1256 .remove = soc_remove,
1259 /* create a new pcm */
1260 static int soc_new_pcm(struct snd_soc_device *socdev,
1261 struct snd_soc_dai_link *dai_link, int num)
1263 struct snd_soc_card *card = socdev->card;
1264 struct snd_soc_codec *codec = card->codec;
1265 struct snd_soc_platform *platform = card->platform;
1266 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1267 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1268 struct snd_soc_pcm_runtime *rtd;
1269 struct snd_pcm *pcm;
1271 int ret = 0, playback = 0, capture = 0;
1273 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1277 rtd->dai = dai_link;
1278 rtd->socdev = socdev;
1279 codec_dai->codec = card->codec;
1281 /* check client and interface hw capabilities */
1282 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
1285 if (codec_dai->playback.channels_min)
1287 if (codec_dai->capture.channels_min)
1290 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1293 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1299 dai_link->pcm = pcm;
1300 pcm->private_data = rtd;
1301 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1302 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1303 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1304 soc_pcm_ops.copy = platform->pcm_ops->copy;
1305 soc_pcm_ops.silence = platform->pcm_ops->silence;
1306 soc_pcm_ops.ack = platform->pcm_ops->ack;
1307 soc_pcm_ops.page = platform->pcm_ops->page;
1310 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1313 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1315 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1317 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1322 pcm->private_free = platform->pcm_free;
1323 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1329 * snd_soc_codec_volatile_register: Report if a register is volatile.
1331 * @codec: CODEC to query.
1332 * @reg: Register to query.
1334 * Boolean function indiciating if a CODEC register is volatile.
1336 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1338 if (codec->volatile_register)
1339 return codec->volatile_register(reg);
1343 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1346 * snd_soc_new_ac97_codec - initailise AC97 device
1347 * @codec: audio codec
1348 * @ops: AC97 bus operations
1349 * @num: AC97 codec number
1351 * Initialises AC97 codec resources for use by ad-hoc devices only.
1353 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1354 struct snd_ac97_bus_ops *ops, int num)
1356 mutex_lock(&codec->mutex);
1358 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1359 if (codec->ac97 == NULL) {
1360 mutex_unlock(&codec->mutex);
1364 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1365 if (codec->ac97->bus == NULL) {
1368 mutex_unlock(&codec->mutex);
1372 codec->ac97->bus->ops = ops;
1373 codec->ac97->num = num;
1374 mutex_unlock(&codec->mutex);
1377 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1380 * snd_soc_free_ac97_codec - free AC97 codec device
1381 * @codec: audio codec
1383 * Frees AC97 codec device resources.
1385 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1387 mutex_lock(&codec->mutex);
1388 kfree(codec->ac97->bus);
1391 mutex_unlock(&codec->mutex);
1393 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1396 * snd_soc_update_bits - update codec register bits
1397 * @codec: audio codec
1398 * @reg: codec register
1399 * @mask: register mask
1402 * Writes new register value.
1404 * Returns 1 for change else 0.
1406 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1407 unsigned int mask, unsigned int value)
1410 unsigned int old, new;
1412 old = snd_soc_read(codec, reg);
1413 new = (old & ~mask) | value;
1414 change = old != new;
1416 snd_soc_write(codec, reg, new);
1420 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1423 * snd_soc_update_bits_locked - update codec register bits
1424 * @codec: audio codec
1425 * @reg: codec register
1426 * @mask: register mask
1429 * Writes new register value, and takes the codec mutex.
1431 * Returns 1 for change else 0.
1433 static int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1434 unsigned short reg, unsigned int mask,
1439 mutex_lock(&codec->mutex);
1440 change = snd_soc_update_bits(codec, reg, mask, value);
1441 mutex_unlock(&codec->mutex);
1447 * snd_soc_test_bits - test register for change
1448 * @codec: audio codec
1449 * @reg: codec register
1450 * @mask: register mask
1453 * Tests a register with a new value and checks if the new value is
1454 * different from the old value.
1456 * Returns 1 for change else 0.
1458 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1459 unsigned int mask, unsigned int value)
1462 unsigned int old, new;
1464 old = snd_soc_read(codec, reg);
1465 new = (old & ~mask) | value;
1466 change = old != new;
1470 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1473 * snd_soc_new_pcms - create new sound card and pcms
1474 * @socdev: the SoC audio device
1475 * @idx: ALSA card index
1476 * @xid: card identification
1478 * Create a new sound card based upon the codec and interface pcms.
1480 * Returns 0 for success, else error.
1482 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1484 struct snd_soc_card *card = socdev->card;
1485 struct snd_soc_codec *codec = card->codec;
1488 mutex_lock(&codec->mutex);
1490 /* register a sound card */
1491 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1493 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1495 mutex_unlock(&codec->mutex);
1499 codec->socdev = socdev;
1500 codec->card->dev = socdev->dev;
1501 codec->card->private_data = codec;
1502 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1504 /* create the pcms */
1505 for (i = 0; i < card->num_links; i++) {
1506 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1508 printk(KERN_ERR "asoc: can't create pcm %s\n",
1509 card->dai_link[i].stream_name);
1510 mutex_unlock(&codec->mutex);
1515 mutex_unlock(&codec->mutex);
1518 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1521 * snd_soc_free_pcms - free sound card and pcms
1522 * @socdev: the SoC audio device
1524 * Frees sound card and pcms associated with the socdev.
1525 * Also unregister the codec if it is an AC97 device.
1527 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1529 struct snd_soc_codec *codec = socdev->card->codec;
1530 #ifdef CONFIG_SND_SOC_AC97_BUS
1531 struct snd_soc_dai *codec_dai;
1535 mutex_lock(&codec->mutex);
1536 soc_cleanup_codec_debugfs(codec);
1537 #ifdef CONFIG_SND_SOC_AC97_BUS
1538 for (i = 0; i < codec->num_dai; i++) {
1539 codec_dai = &codec->dai[i];
1540 if (codec_dai->ac97_control && codec->ac97 &&
1541 strcmp(codec->name, "AC97") != 0) {
1542 soc_ac97_dev_unregister(codec);
1550 snd_card_free(codec->card);
1551 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1552 mutex_unlock(&codec->mutex);
1554 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1557 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1558 * @substream: the pcm substream
1559 * @hw: the hardware parameters
1561 * Sets the substream runtime hardware parameters.
1563 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1564 const struct snd_pcm_hardware *hw)
1566 struct snd_pcm_runtime *runtime = substream->runtime;
1567 runtime->hw.info = hw->info;
1568 runtime->hw.formats = hw->formats;
1569 runtime->hw.period_bytes_min = hw->period_bytes_min;
1570 runtime->hw.period_bytes_max = hw->period_bytes_max;
1571 runtime->hw.periods_min = hw->periods_min;
1572 runtime->hw.periods_max = hw->periods_max;
1573 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1574 runtime->hw.fifo_size = hw->fifo_size;
1577 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1580 * snd_soc_cnew - create new control
1581 * @_template: control template
1582 * @data: control private data
1583 * @long_name: control long name
1585 * Create a new mixer control from a template control.
1587 * Returns 0 for success, else error.
1589 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1590 void *data, char *long_name)
1592 struct snd_kcontrol_new template;
1594 memcpy(&template, _template, sizeof(template));
1596 template.name = long_name;
1599 return snd_ctl_new1(&template, data);
1601 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1604 * snd_soc_add_controls - add an array of controls to a codec.
1605 * Convienience function to add a list of controls. Many codecs were
1606 * duplicating this code.
1608 * @codec: codec to add controls to
1609 * @controls: array of controls to add
1610 * @num_controls: number of elements in the array
1612 * Return 0 for success, else error.
1614 int snd_soc_add_controls(struct snd_soc_codec *codec,
1615 const struct snd_kcontrol_new *controls, int num_controls)
1617 struct snd_card *card = codec->card;
1620 for (i = 0; i < num_controls; i++) {
1621 const struct snd_kcontrol_new *control = &controls[i];
1622 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1624 dev_err(codec->dev, "%s: Failed to add %s\n",
1625 codec->name, control->name);
1632 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1635 * snd_soc_info_enum_double - enumerated double mixer info callback
1636 * @kcontrol: mixer control
1637 * @uinfo: control element information
1639 * Callback to provide information about a double enumerated
1642 * Returns 0 for success.
1644 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1645 struct snd_ctl_elem_info *uinfo)
1647 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1649 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1650 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1651 uinfo->value.enumerated.items = e->max;
1653 if (uinfo->value.enumerated.item > e->max - 1)
1654 uinfo->value.enumerated.item = e->max - 1;
1655 strcpy(uinfo->value.enumerated.name,
1656 e->texts[uinfo->value.enumerated.item]);
1659 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1662 * snd_soc_get_enum_double - enumerated double mixer get callback
1663 * @kcontrol: mixer control
1664 * @ucontrol: control element information
1666 * Callback to get the value of a double enumerated mixer.
1668 * Returns 0 for success.
1670 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1671 struct snd_ctl_elem_value *ucontrol)
1673 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1674 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1675 unsigned int val, bitmask;
1677 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1679 val = snd_soc_read(codec, e->reg);
1680 ucontrol->value.enumerated.item[0]
1681 = (val >> e->shift_l) & (bitmask - 1);
1682 if (e->shift_l != e->shift_r)
1683 ucontrol->value.enumerated.item[1] =
1684 (val >> e->shift_r) & (bitmask - 1);
1688 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1691 * snd_soc_put_enum_double - enumerated double mixer put callback
1692 * @kcontrol: mixer control
1693 * @ucontrol: control element information
1695 * Callback to set the value of a double enumerated mixer.
1697 * Returns 0 for success.
1699 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1700 struct snd_ctl_elem_value *ucontrol)
1702 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1703 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1705 unsigned int mask, bitmask;
1707 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1709 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1711 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1712 mask = (bitmask - 1) << e->shift_l;
1713 if (e->shift_l != e->shift_r) {
1714 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1716 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1717 mask |= (bitmask - 1) << e->shift_r;
1720 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1722 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1725 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1726 * @kcontrol: mixer control
1727 * @ucontrol: control element information
1729 * Callback to get the value of a double semi enumerated mixer.
1731 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1732 * used for handling bitfield coded enumeration for example.
1734 * Returns 0 for success.
1736 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1737 struct snd_ctl_elem_value *ucontrol)
1739 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1740 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1741 unsigned int reg_val, val, mux;
1743 reg_val = snd_soc_read(codec, e->reg);
1744 val = (reg_val >> e->shift_l) & e->mask;
1745 for (mux = 0; mux < e->max; mux++) {
1746 if (val == e->values[mux])
1749 ucontrol->value.enumerated.item[0] = mux;
1750 if (e->shift_l != e->shift_r) {
1751 val = (reg_val >> e->shift_r) & e->mask;
1752 for (mux = 0; mux < e->max; mux++) {
1753 if (val == e->values[mux])
1756 ucontrol->value.enumerated.item[1] = mux;
1761 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1764 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1765 * @kcontrol: mixer control
1766 * @ucontrol: control element information
1768 * Callback to set the value of a double semi enumerated mixer.
1770 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1771 * used for handling bitfield coded enumeration for example.
1773 * Returns 0 for success.
1775 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1776 struct snd_ctl_elem_value *ucontrol)
1778 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1779 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1783 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1785 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1786 mask = e->mask << e->shift_l;
1787 if (e->shift_l != e->shift_r) {
1788 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1790 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1791 mask |= e->mask << e->shift_r;
1794 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1796 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1799 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1800 * @kcontrol: mixer control
1801 * @uinfo: control element information
1803 * Callback to provide information about an external enumerated
1806 * Returns 0 for success.
1808 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1809 struct snd_ctl_elem_info *uinfo)
1811 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1813 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1815 uinfo->value.enumerated.items = e->max;
1817 if (uinfo->value.enumerated.item > e->max - 1)
1818 uinfo->value.enumerated.item = e->max - 1;
1819 strcpy(uinfo->value.enumerated.name,
1820 e->texts[uinfo->value.enumerated.item]);
1823 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1826 * snd_soc_info_volsw_ext - external single mixer info callback
1827 * @kcontrol: mixer control
1828 * @uinfo: control element information
1830 * Callback to provide information about a single external mixer control.
1832 * Returns 0 for success.
1834 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1835 struct snd_ctl_elem_info *uinfo)
1837 int max = kcontrol->private_value;
1839 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1840 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1842 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1845 uinfo->value.integer.min = 0;
1846 uinfo->value.integer.max = max;
1849 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1852 * snd_soc_info_volsw - single mixer info callback
1853 * @kcontrol: mixer control
1854 * @uinfo: control element information
1856 * Callback to provide information about a single mixer control.
1858 * Returns 0 for success.
1860 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1861 struct snd_ctl_elem_info *uinfo)
1863 struct soc_mixer_control *mc =
1864 (struct soc_mixer_control *)kcontrol->private_value;
1866 unsigned int shift = mc->shift;
1867 unsigned int rshift = mc->rshift;
1869 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1870 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1872 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1874 uinfo->count = shift == rshift ? 1 : 2;
1875 uinfo->value.integer.min = 0;
1876 uinfo->value.integer.max = max;
1879 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1882 * snd_soc_get_volsw - single mixer get callback
1883 * @kcontrol: mixer control
1884 * @ucontrol: control element information
1886 * Callback to get the value of a single mixer control.
1888 * Returns 0 for success.
1890 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1891 struct snd_ctl_elem_value *ucontrol)
1893 struct soc_mixer_control *mc =
1894 (struct soc_mixer_control *)kcontrol->private_value;
1895 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1896 unsigned int reg = mc->reg;
1897 unsigned int shift = mc->shift;
1898 unsigned int rshift = mc->rshift;
1900 unsigned int mask = (1 << fls(max)) - 1;
1901 unsigned int invert = mc->invert;
1903 ucontrol->value.integer.value[0] =
1904 (snd_soc_read(codec, reg) >> shift) & mask;
1905 if (shift != rshift)
1906 ucontrol->value.integer.value[1] =
1907 (snd_soc_read(codec, reg) >> rshift) & mask;
1909 ucontrol->value.integer.value[0] =
1910 max - ucontrol->value.integer.value[0];
1911 if (shift != rshift)
1912 ucontrol->value.integer.value[1] =
1913 max - ucontrol->value.integer.value[1];
1918 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1921 * snd_soc_put_volsw - single mixer put callback
1922 * @kcontrol: mixer control
1923 * @ucontrol: control element information
1925 * Callback to set the value of a single mixer control.
1927 * Returns 0 for success.
1929 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1930 struct snd_ctl_elem_value *ucontrol)
1932 struct soc_mixer_control *mc =
1933 (struct soc_mixer_control *)kcontrol->private_value;
1934 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1935 unsigned int reg = mc->reg;
1936 unsigned int shift = mc->shift;
1937 unsigned int rshift = mc->rshift;
1939 unsigned int mask = (1 << fls(max)) - 1;
1940 unsigned int invert = mc->invert;
1941 unsigned int val, val2, val_mask;
1943 val = (ucontrol->value.integer.value[0] & mask);
1946 val_mask = mask << shift;
1948 if (shift != rshift) {
1949 val2 = (ucontrol->value.integer.value[1] & mask);
1952 val_mask |= mask << rshift;
1953 val |= val2 << rshift;
1955 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
1957 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1960 * snd_soc_info_volsw_2r - double mixer info callback
1961 * @kcontrol: mixer control
1962 * @uinfo: control element information
1964 * Callback to provide information about a double mixer control that
1965 * spans 2 codec registers.
1967 * Returns 0 for success.
1969 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1970 struct snd_ctl_elem_info *uinfo)
1972 struct soc_mixer_control *mc =
1973 (struct soc_mixer_control *)kcontrol->private_value;
1976 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1977 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1979 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1982 uinfo->value.integer.min = 0;
1983 uinfo->value.integer.max = max;
1986 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1989 * snd_soc_get_volsw_2r - double mixer get callback
1990 * @kcontrol: mixer control
1991 * @ucontrol: control element information
1993 * Callback to get the value of a double mixer control that spans 2 registers.
1995 * Returns 0 for success.
1997 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1998 struct snd_ctl_elem_value *ucontrol)
2000 struct soc_mixer_control *mc =
2001 (struct soc_mixer_control *)kcontrol->private_value;
2002 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2003 unsigned int reg = mc->reg;
2004 unsigned int reg2 = mc->rreg;
2005 unsigned int shift = mc->shift;
2007 unsigned int mask = (1 << fls(max)) - 1;
2008 unsigned int invert = mc->invert;
2010 ucontrol->value.integer.value[0] =
2011 (snd_soc_read(codec, reg) >> shift) & mask;
2012 ucontrol->value.integer.value[1] =
2013 (snd_soc_read(codec, reg2) >> shift) & mask;
2015 ucontrol->value.integer.value[0] =
2016 max - ucontrol->value.integer.value[0];
2017 ucontrol->value.integer.value[1] =
2018 max - ucontrol->value.integer.value[1];
2023 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2026 * snd_soc_put_volsw_2r - double mixer set callback
2027 * @kcontrol: mixer control
2028 * @ucontrol: control element information
2030 * Callback to set the value of a double mixer control that spans 2 registers.
2032 * Returns 0 for success.
2034 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2035 struct snd_ctl_elem_value *ucontrol)
2037 struct soc_mixer_control *mc =
2038 (struct soc_mixer_control *)kcontrol->private_value;
2039 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2040 unsigned int reg = mc->reg;
2041 unsigned int reg2 = mc->rreg;
2042 unsigned int shift = mc->shift;
2044 unsigned int mask = (1 << fls(max)) - 1;
2045 unsigned int invert = mc->invert;
2047 unsigned int val, val2, val_mask;
2049 val_mask = mask << shift;
2050 val = (ucontrol->value.integer.value[0] & mask);
2051 val2 = (ucontrol->value.integer.value[1] & mask);
2059 val2 = val2 << shift;
2061 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2065 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2068 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2071 * snd_soc_info_volsw_s8 - signed mixer info callback
2072 * @kcontrol: mixer control
2073 * @uinfo: control element information
2075 * Callback to provide information about a signed mixer control.
2077 * Returns 0 for success.
2079 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2080 struct snd_ctl_elem_info *uinfo)
2082 struct soc_mixer_control *mc =
2083 (struct soc_mixer_control *)kcontrol->private_value;
2087 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2089 uinfo->value.integer.min = 0;
2090 uinfo->value.integer.max = max-min;
2093 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2096 * snd_soc_get_volsw_s8 - signed mixer get callback
2097 * @kcontrol: mixer control
2098 * @ucontrol: control element information
2100 * Callback to get the value of a signed mixer control.
2102 * Returns 0 for success.
2104 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2105 struct snd_ctl_elem_value *ucontrol)
2107 struct soc_mixer_control *mc =
2108 (struct soc_mixer_control *)kcontrol->private_value;
2109 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2110 unsigned int reg = mc->reg;
2112 int val = snd_soc_read(codec, reg);
2114 ucontrol->value.integer.value[0] =
2115 ((signed char)(val & 0xff))-min;
2116 ucontrol->value.integer.value[1] =
2117 ((signed char)((val >> 8) & 0xff))-min;
2120 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2123 * snd_soc_put_volsw_sgn - signed mixer put callback
2124 * @kcontrol: mixer control
2125 * @ucontrol: control element information
2127 * Callback to set the value of a signed mixer control.
2129 * Returns 0 for success.
2131 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2132 struct snd_ctl_elem_value *ucontrol)
2134 struct soc_mixer_control *mc =
2135 (struct soc_mixer_control *)kcontrol->private_value;
2136 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2137 unsigned int reg = mc->reg;
2141 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2142 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2144 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2146 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2149 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2151 * @clk_id: DAI specific clock ID
2152 * @freq: new clock frequency in Hz
2153 * @dir: new clock direction - input/output.
2155 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2157 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2158 unsigned int freq, int dir)
2160 if (dai->ops && dai->ops->set_sysclk)
2161 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2165 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2168 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2170 * @div_id: DAI specific clock divider ID
2171 * @div: new clock divisor.
2173 * Configures the clock dividers. This is used to derive the best DAI bit and
2174 * frame clocks from the system or master clock. It's best to set the DAI bit
2175 * and frame clocks as low as possible to save system power.
2177 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2178 int div_id, int div)
2180 if (dai->ops && dai->ops->set_clkdiv)
2181 return dai->ops->set_clkdiv(dai, div_id, div);
2185 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2188 * snd_soc_dai_set_pll - configure DAI PLL.
2190 * @pll_id: DAI specific PLL ID
2191 * @source: DAI specific source for the PLL
2192 * @freq_in: PLL input clock frequency in Hz
2193 * @freq_out: requested PLL output clock frequency in Hz
2195 * Configures and enables PLL to generate output clock based on input clock.
2197 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2198 unsigned int freq_in, unsigned int freq_out)
2200 if (dai->ops && dai->ops->set_pll)
2201 return dai->ops->set_pll(dai, pll_id, source,
2206 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2209 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2211 * @fmt: SND_SOC_DAIFMT_ format value.
2213 * Configures the DAI hardware format and clocking.
2215 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2217 if (dai->ops && dai->ops->set_fmt)
2218 return dai->ops->set_fmt(dai, fmt);
2222 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2225 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2227 * @tx_mask: bitmask representing active TX slots.
2228 * @rx_mask: bitmask representing active RX slots.
2229 * @slots: Number of slots in use.
2230 * @slot_width: Width in bits for each slot.
2232 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2235 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2236 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2238 if (dai->ops && dai->ops->set_tdm_slot)
2239 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2244 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2247 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2249 * @tx_num: how many TX channels
2250 * @tx_slot: pointer to an array which imply the TX slot number channel
2252 * @rx_num: how many RX channels
2253 * @rx_slot: pointer to an array which imply the RX slot number channel
2256 * configure the relationship between channel number and TDM slot number.
2258 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2259 unsigned int tx_num, unsigned int *tx_slot,
2260 unsigned int rx_num, unsigned int *rx_slot)
2262 if (dai->ops && dai->ops->set_channel_map)
2263 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2268 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2271 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2273 * @tristate: tristate enable
2275 * Tristates the DAI so that others can use it.
2277 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2279 if (dai->ops && dai->ops->set_tristate)
2280 return dai->ops->set_tristate(dai, tristate);
2284 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2287 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2289 * @mute: mute enable
2291 * Mutes the DAI DAC.
2293 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2295 if (dai->ops && dai->ops->digital_mute)
2296 return dai->ops->digital_mute(dai, mute);
2300 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2303 * snd_soc_register_card - Register a card with the ASoC core
2305 * @card: Card to register
2307 * Note that currently this is an internal only function: it will be
2308 * exposed to machine drivers after further backporting of ASoC v2
2309 * registration APIs.
2311 static int snd_soc_register_card(struct snd_soc_card *card)
2313 if (!card->name || !card->dev)
2316 INIT_LIST_HEAD(&card->list);
2317 card->instantiated = 0;
2319 mutex_lock(&client_mutex);
2320 list_add(&card->list, &card_list);
2321 snd_soc_instantiate_cards();
2322 mutex_unlock(&client_mutex);
2324 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2330 * snd_soc_unregister_card - Unregister a card with the ASoC core
2332 * @card: Card to unregister
2334 * Note that currently this is an internal only function: it will be
2335 * exposed to machine drivers after further backporting of ASoC v2
2336 * registration APIs.
2338 static int snd_soc_unregister_card(struct snd_soc_card *card)
2340 mutex_lock(&client_mutex);
2341 list_del(&card->list);
2342 mutex_unlock(&client_mutex);
2344 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2350 * snd_soc_register_dai - Register a DAI with the ASoC core
2352 * @dai: DAI to register
2354 int snd_soc_register_dai(struct snd_soc_dai *dai)
2359 /* The device should become mandatory over time */
2361 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2364 dai->ops = &null_dai_ops;
2366 INIT_LIST_HEAD(&dai->list);
2368 mutex_lock(&client_mutex);
2369 list_add(&dai->list, &dai_list);
2370 snd_soc_instantiate_cards();
2371 mutex_unlock(&client_mutex);
2373 pr_debug("Registered DAI '%s'\n", dai->name);
2377 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2380 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2382 * @dai: DAI to unregister
2384 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2386 mutex_lock(&client_mutex);
2387 list_del(&dai->list);
2388 mutex_unlock(&client_mutex);
2390 pr_debug("Unregistered DAI '%s'\n", dai->name);
2392 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2395 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2397 * @dai: Array of DAIs to register
2398 * @count: Number of DAIs
2400 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2404 for (i = 0; i < count; i++) {
2405 ret = snd_soc_register_dai(&dai[i]);
2413 for (i--; i >= 0; i--)
2414 snd_soc_unregister_dai(&dai[i]);
2418 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2421 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2423 * @dai: Array of DAIs to unregister
2424 * @count: Number of DAIs
2426 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2430 for (i = 0; i < count; i++)
2431 snd_soc_unregister_dai(&dai[i]);
2433 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2436 * snd_soc_register_platform - Register a platform with the ASoC core
2438 * @platform: platform to register
2440 int snd_soc_register_platform(struct snd_soc_platform *platform)
2442 if (!platform->name)
2445 INIT_LIST_HEAD(&platform->list);
2447 mutex_lock(&client_mutex);
2448 list_add(&platform->list, &platform_list);
2449 snd_soc_instantiate_cards();
2450 mutex_unlock(&client_mutex);
2452 pr_debug("Registered platform '%s'\n", platform->name);
2456 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2459 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2461 * @platform: platform to unregister
2463 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2465 mutex_lock(&client_mutex);
2466 list_del(&platform->list);
2467 mutex_unlock(&client_mutex);
2469 pr_debug("Unregistered platform '%s'\n", platform->name);
2471 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2473 static u64 codec_format_map[] = {
2474 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2475 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2476 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2477 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2478 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2479 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2480 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2481 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2482 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2483 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2484 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2485 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2486 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2487 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2488 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2489 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2492 /* Fix up the DAI formats for endianness: codecs don't actually see
2493 * the endianness of the data but we're using the CPU format
2494 * definitions which do need to include endianness so we ensure that
2495 * codec DAIs always have both big and little endian variants set.
2497 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2501 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2502 if (stream->formats & codec_format_map[i])
2503 stream->formats |= codec_format_map[i];
2507 * snd_soc_register_codec - Register a codec with the ASoC core
2509 * @codec: codec to register
2511 int snd_soc_register_codec(struct snd_soc_codec *codec)
2518 /* The device should become mandatory over time */
2520 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2522 INIT_LIST_HEAD(&codec->list);
2524 for (i = 0; i < codec->num_dai; i++) {
2525 fixup_codec_formats(&codec->dai[i].playback);
2526 fixup_codec_formats(&codec->dai[i].capture);
2529 mutex_lock(&client_mutex);
2530 list_add(&codec->list, &codec_list);
2531 snd_soc_instantiate_cards();
2532 mutex_unlock(&client_mutex);
2534 pr_debug("Registered codec '%s'\n", codec->name);
2538 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2541 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2543 * @codec: codec to unregister
2545 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2547 mutex_lock(&client_mutex);
2548 list_del(&codec->list);
2549 mutex_unlock(&client_mutex);
2551 pr_debug("Unregistered codec '%s'\n", codec->name);
2553 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2555 static int __init snd_soc_init(void)
2557 #ifdef CONFIG_DEBUG_FS
2558 debugfs_root = debugfs_create_dir("asoc", NULL);
2559 if (IS_ERR(debugfs_root) || !debugfs_root) {
2561 "ASoC: Failed to create debugfs directory\n");
2562 debugfs_root = NULL;
2566 return platform_driver_register(&soc_driver);
2569 static void __exit snd_soc_exit(void)
2571 #ifdef CONFIG_DEBUG_FS
2572 debugfs_remove_recursive(debugfs_root);
2574 platform_driver_unregister(&soc_driver);
2577 module_init(snd_soc_init);
2578 module_exit(snd_soc_exit);
2580 /* Module information */
2581 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2582 MODULE_DESCRIPTION("ALSA SoC Core");
2583 MODULE_LICENSE("GPL");
2584 MODULE_ALIAS("platform:soc-audio");