2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/slab.h>
34 #include <sound/ac97_codec.h>
35 #include <sound/core.h>
36 #include <sound/jack.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/initval.h>
42 #define CREATE_TRACE_POINTS
43 #include <trace/events/asoc.h>
47 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
49 #ifdef CONFIG_DEBUG_FS
50 struct dentry *snd_soc_debugfs_root;
51 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
54 static DEFINE_MUTEX(client_mutex);
55 static LIST_HEAD(card_list);
56 static LIST_HEAD(dai_list);
57 static LIST_HEAD(platform_list);
58 static LIST_HEAD(codec_list);
60 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
63 * This is a timeout to do a DAPM powerdown after a stream is closed().
64 * It can be used to eliminate pops between different playback streams, e.g.
65 * between two audio tracks.
67 static int pmdown_time = 5000;
68 module_param(pmdown_time, int, 0);
69 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71 /* returns the minimum number of bytes needed to represent
72 * a particular given value */
73 static int min_bytes_needed(unsigned long val)
78 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
81 c = (sizeof val * 8) - c;
89 /* fill buf which is 'len' bytes with a formatted
90 * string of the form 'reg: value\n' */
91 static int format_register_str(struct snd_soc_codec *codec,
92 unsigned int reg, char *buf, size_t len)
94 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
95 int regsize = codec->driver->reg_word_size * 2;
98 char regbuf[regsize + 1];
100 /* since tmpbuf is allocated on the stack, warn the callers if they
101 * try to abuse this function */
104 /* +2 for ': ' and + 1 for '\n' */
105 if (wordsize + regsize + 2 + 1 != len)
108 ret = snd_soc_read(codec , reg);
110 memset(regbuf, 'X', regsize);
111 regbuf[regsize] = '\0';
113 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
116 /* prepare the buffer */
117 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
118 /* copy it back to the caller without the '\0' */
119 memcpy(buf, tmpbuf, len);
124 /* codec register dump */
125 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
126 size_t count, loff_t pos)
129 int wordsize, regsize;
134 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
135 regsize = codec->driver->reg_word_size * 2;
137 len = wordsize + regsize + 2 + 1;
139 if (!codec->driver->reg_cache_size)
142 if (codec->driver->reg_cache_step)
143 step = codec->driver->reg_cache_step;
145 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
146 if (codec->readable_register && !codec->readable_register(codec, i))
148 if (codec->driver->display_register) {
149 count += codec->driver->display_register(codec, buf + count,
150 PAGE_SIZE - count, i);
152 /* only support larger than PAGE_SIZE bytes debugfs
153 * entries for the default case */
155 if (total + len >= count - 1)
157 format_register_str(codec, i, buf + total, len);
164 total = min(total, count - 1);
169 static ssize_t codec_reg_show(struct device *dev,
170 struct device_attribute *attr, char *buf)
172 struct snd_soc_pcm_runtime *rtd =
173 container_of(dev, struct snd_soc_pcm_runtime, dev);
175 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
178 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
180 static ssize_t pmdown_time_show(struct device *dev,
181 struct device_attribute *attr, char *buf)
183 struct snd_soc_pcm_runtime *rtd =
184 container_of(dev, struct snd_soc_pcm_runtime, dev);
186 return sprintf(buf, "%ld\n", rtd->pmdown_time);
189 static ssize_t pmdown_time_set(struct device *dev,
190 struct device_attribute *attr,
191 const char *buf, size_t count)
193 struct snd_soc_pcm_runtime *rtd =
194 container_of(dev, struct snd_soc_pcm_runtime, dev);
197 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
204 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206 #ifdef CONFIG_DEBUG_FS
207 static int codec_reg_open_file(struct inode *inode, struct file *file)
209 file->private_data = inode->i_private;
213 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
214 size_t count, loff_t *ppos)
217 struct snd_soc_codec *codec = file->private_data;
220 if (*ppos < 0 || !count)
223 buf = kmalloc(count, GFP_KERNEL);
227 ret = soc_codec_reg_show(codec, buf, count, *ppos);
229 if (copy_to_user(user_buf, buf, ret)) {
240 static ssize_t codec_reg_write_file(struct file *file,
241 const char __user *user_buf, size_t count, loff_t *ppos)
246 unsigned long reg, value;
248 struct snd_soc_codec *codec = file->private_data;
250 buf_size = min(count, (sizeof(buf)-1));
251 if (copy_from_user(buf, user_buf, buf_size))
255 if (codec->driver->reg_cache_step)
256 step = codec->driver->reg_cache_step;
258 while (*start == ' ')
260 reg = simple_strtoul(start, &start, 16);
261 while (*start == ' ')
263 if (strict_strtoul(start, 16, &value))
266 /* Userspace has been fiddling around behind the kernel's back */
267 add_taint(TAINT_USER);
269 snd_soc_write(codec, reg, value);
273 static const struct file_operations codec_reg_fops = {
274 .open = codec_reg_open_file,
275 .read = codec_reg_read_file,
276 .write = codec_reg_write_file,
277 .llseek = default_llseek,
280 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286 if (!codec->debugfs_codec_root) {
288 "ASoC: Failed to create codec debugfs directory\n");
292 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
297 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
298 codec->debugfs_codec_root,
299 codec, &codec_reg_fops);
300 if (!codec->debugfs_reg)
302 "ASoC: Failed to create codec register debugfs file\n");
304 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
307 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309 debugfs_remove_recursive(codec->debugfs_codec_root);
312 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
313 size_t count, loff_t *ppos)
315 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
316 ssize_t len, ret = 0;
317 struct snd_soc_codec *codec;
322 list_for_each_entry(codec, &codec_list, list) {
323 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
327 if (ret > PAGE_SIZE) {
334 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
341 static const struct file_operations codec_list_fops = {
342 .read = codec_list_read_file,
343 .llseek = default_llseek,/* read accesses f_pos */
346 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
347 size_t count, loff_t *ppos)
349 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
350 ssize_t len, ret = 0;
351 struct snd_soc_dai *dai;
356 list_for_each_entry(dai, &dai_list, list) {
357 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
360 if (ret > PAGE_SIZE) {
366 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
373 static const struct file_operations dai_list_fops = {
374 .read = dai_list_read_file,
375 .llseek = default_llseek,/* read accesses f_pos */
378 static ssize_t platform_list_read_file(struct file *file,
379 char __user *user_buf,
380 size_t count, loff_t *ppos)
382 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
383 ssize_t len, ret = 0;
384 struct snd_soc_platform *platform;
389 list_for_each_entry(platform, &platform_list, list) {
390 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
394 if (ret > PAGE_SIZE) {
400 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
407 static const struct file_operations platform_list_fops = {
408 .read = platform_list_read_file,
409 .llseek = default_llseek,/* read accesses f_pos */
412 static void soc_init_card_debugfs(struct snd_soc_card *card)
414 card->debugfs_card_root = debugfs_create_dir(card->name,
415 snd_soc_debugfs_root);
416 if (!card->debugfs_card_root) {
418 "ASoC: Failed to create codec debugfs directory\n");
422 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
423 card->debugfs_card_root,
425 if (!card->debugfs_pop_time)
427 "Failed to create pop time debugfs file\n");
430 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
432 debugfs_remove_recursive(card->debugfs_card_root);
437 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
441 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
445 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
449 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
454 #ifdef CONFIG_SND_SOC_AC97_BUS
455 /* unregister ac97 codec */
456 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
458 if (codec->ac97->dev.bus)
459 device_unregister(&codec->ac97->dev);
463 /* stop no dev release warning */
464 static void soc_ac97_device_release(struct device *dev){}
466 /* register ac97 codec to bus */
467 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
471 codec->ac97->dev.bus = &ac97_bus_type;
472 codec->ac97->dev.parent = codec->card->dev;
473 codec->ac97->dev.release = soc_ac97_device_release;
475 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
476 codec->card->snd_card->number, 0, codec->name);
477 err = device_register(&codec->ac97->dev);
479 snd_printk(KERN_ERR "Can't register ac97 bus\n");
480 codec->ac97->dev.bus = NULL;
487 #ifdef CONFIG_PM_SLEEP
488 /* powers down audio subsystem for suspend */
489 int snd_soc_suspend(struct device *dev)
491 struct snd_soc_card *card = dev_get_drvdata(dev);
492 struct snd_soc_codec *codec;
495 /* If the initialization of this soc device failed, there is no codec
496 * associated with it. Just bail out in this case.
498 if (list_empty(&card->codec_dev_list))
501 /* Due to the resume being scheduled into a workqueue we could
502 * suspend before that's finished - wait for it to complete.
504 snd_power_lock(card->snd_card);
505 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
506 snd_power_unlock(card->snd_card);
508 /* we're going to block userspace touching us until resume completes */
509 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
511 /* mute any active DACs */
512 for (i = 0; i < card->num_rtd; i++) {
513 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
514 struct snd_soc_dai_driver *drv = dai->driver;
516 if (card->rtd[i].dai_link->ignore_suspend)
519 if (drv->ops->digital_mute && dai->playback_active)
520 drv->ops->digital_mute(dai, 1);
523 /* suspend all pcms */
524 for (i = 0; i < card->num_rtd; i++) {
525 if (card->rtd[i].dai_link->ignore_suspend)
528 snd_pcm_suspend_all(card->rtd[i].pcm);
531 if (card->suspend_pre)
532 card->suspend_pre(card);
534 for (i = 0; i < card->num_rtd; i++) {
535 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
536 struct snd_soc_platform *platform = card->rtd[i].platform;
538 if (card->rtd[i].dai_link->ignore_suspend)
541 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
542 cpu_dai->driver->suspend(cpu_dai);
543 if (platform->driver->suspend && !platform->suspended) {
544 platform->driver->suspend(cpu_dai);
545 platform->suspended = 1;
549 /* close any waiting streams and save state */
550 for (i = 0; i < card->num_rtd; i++) {
551 flush_delayed_work_sync(&card->rtd[i].delayed_work);
552 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
555 for (i = 0; i < card->num_rtd; i++) {
556 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
558 if (card->rtd[i].dai_link->ignore_suspend)
561 if (driver->playback.stream_name != NULL)
562 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
563 SND_SOC_DAPM_STREAM_SUSPEND);
565 if (driver->capture.stream_name != NULL)
566 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
567 SND_SOC_DAPM_STREAM_SUSPEND);
570 /* suspend all CODECs */
571 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
572 /* If there are paths active then the CODEC will be held with
573 * bias _ON and should not be suspended. */
574 if (!codec->suspended && codec->driver->suspend) {
575 switch (codec->dapm.bias_level) {
576 case SND_SOC_BIAS_STANDBY:
577 case SND_SOC_BIAS_OFF:
578 codec->driver->suspend(codec, PMSG_SUSPEND);
579 codec->suspended = 1;
582 dev_dbg(codec->dev, "CODEC is on over suspend\n");
588 for (i = 0; i < card->num_rtd; i++) {
589 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
591 if (card->rtd[i].dai_link->ignore_suspend)
594 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
595 cpu_dai->driver->suspend(cpu_dai);
598 if (card->suspend_post)
599 card->suspend_post(card);
603 EXPORT_SYMBOL_GPL(snd_soc_suspend);
605 /* deferred resume work, so resume can complete before we finished
606 * setting our codec back up, which can be very slow on I2C
608 static void soc_resume_deferred(struct work_struct *work)
610 struct snd_soc_card *card =
611 container_of(work, struct snd_soc_card, deferred_resume_work);
612 struct snd_soc_codec *codec;
615 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
616 * so userspace apps are blocked from touching us
619 dev_dbg(card->dev, "starting resume work\n");
621 /* Bring us up into D2 so that DAPM starts enabling things */
622 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
624 if (card->resume_pre)
625 card->resume_pre(card);
627 /* resume AC97 DAIs */
628 for (i = 0; i < card->num_rtd; i++) {
629 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
631 if (card->rtd[i].dai_link->ignore_suspend)
634 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
635 cpu_dai->driver->resume(cpu_dai);
638 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
639 /* If the CODEC was idle over suspend then it will have been
640 * left with bias OFF or STANDBY and suspended so we must now
641 * resume. Otherwise the suspend was suppressed.
643 if (codec->driver->resume && codec->suspended) {
644 switch (codec->dapm.bias_level) {
645 case SND_SOC_BIAS_STANDBY:
646 case SND_SOC_BIAS_OFF:
647 codec->driver->resume(codec);
648 codec->suspended = 0;
651 dev_dbg(codec->dev, "CODEC was on over suspend\n");
657 for (i = 0; i < card->num_rtd; i++) {
658 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
660 if (card->rtd[i].dai_link->ignore_suspend)
663 if (driver->playback.stream_name != NULL)
664 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
665 SND_SOC_DAPM_STREAM_RESUME);
667 if (driver->capture.stream_name != NULL)
668 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
669 SND_SOC_DAPM_STREAM_RESUME);
672 /* unmute any active DACs */
673 for (i = 0; i < card->num_rtd; i++) {
674 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
675 struct snd_soc_dai_driver *drv = dai->driver;
677 if (card->rtd[i].dai_link->ignore_suspend)
680 if (drv->ops->digital_mute && dai->playback_active)
681 drv->ops->digital_mute(dai, 0);
684 for (i = 0; i < card->num_rtd; i++) {
685 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
686 struct snd_soc_platform *platform = card->rtd[i].platform;
688 if (card->rtd[i].dai_link->ignore_suspend)
691 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
692 cpu_dai->driver->resume(cpu_dai);
693 if (platform->driver->resume && platform->suspended) {
694 platform->driver->resume(cpu_dai);
695 platform->suspended = 0;
699 if (card->resume_post)
700 card->resume_post(card);
702 dev_dbg(card->dev, "resume work completed\n");
704 /* userspace can access us now we are back as we were before */
705 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
708 /* powers up audio subsystem after a suspend */
709 int snd_soc_resume(struct device *dev)
711 struct snd_soc_card *card = dev_get_drvdata(dev);
712 int i, ac97_control = 0;
714 /* AC97 devices might have other drivers hanging off them so
715 * need to resume immediately. Other drivers don't have that
716 * problem and may take a substantial amount of time to resume
717 * due to I/O costs and anti-pop so handle them out of line.
719 for (i = 0; i < card->num_rtd; i++) {
720 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
721 ac97_control |= cpu_dai->driver->ac97_control;
724 dev_dbg(dev, "Resuming AC97 immediately\n");
725 soc_resume_deferred(&card->deferred_resume_work);
727 dev_dbg(dev, "Scheduling resume work\n");
728 if (!schedule_work(&card->deferred_resume_work))
729 dev_err(dev, "resume work item may be lost\n");
734 EXPORT_SYMBOL_GPL(snd_soc_resume);
736 #define snd_soc_suspend NULL
737 #define snd_soc_resume NULL
740 static struct snd_soc_dai_ops null_dai_ops = {
743 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
745 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
746 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
747 struct snd_soc_codec *codec;
748 struct snd_soc_platform *platform;
749 struct snd_soc_dai *codec_dai, *cpu_dai;
750 const char *platform_name;
754 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
756 /* do we already have the CPU DAI for this link ? */
760 /* no, then find CPU DAI from registered DAIs*/
761 list_for_each_entry(cpu_dai, &dai_list, list) {
762 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
763 rtd->cpu_dai = cpu_dai;
767 dev_dbg(card->dev, "CPU DAI %s not registered\n",
768 dai_link->cpu_dai_name);
771 /* do we already have the CODEC for this link ? */
776 /* no, then find CODEC from registered CODECs*/
777 list_for_each_entry(codec, &codec_list, list) {
778 if (!strcmp(codec->name, dai_link->codec_name)) {
781 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
782 list_for_each_entry(codec_dai, &dai_list, list) {
783 if (codec->dev == codec_dai->dev &&
784 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
785 rtd->codec_dai = codec_dai;
789 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
790 dai_link->codec_dai_name);
795 dev_dbg(card->dev, "CODEC %s not registered\n",
796 dai_link->codec_name);
799 /* do we need a platform? */
803 /* if there's no platform we match on the empty platform */
804 platform_name = dai_link->platform_name;
806 platform_name = "snd-soc-dummy";
808 /* no, then find one from the set of registered platforms */
809 list_for_each_entry(platform, &platform_list, list) {
810 if (!strcmp(platform->name, platform_name)) {
811 rtd->platform = platform;
816 dev_dbg(card->dev, "platform %s not registered\n",
817 dai_link->platform_name);
821 /* mark rtd as complete if we found all 4 of our client devices */
822 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
829 static void soc_remove_codec(struct snd_soc_codec *codec)
833 if (codec->driver->remove) {
834 err = codec->driver->remove(codec);
837 "asoc: failed to remove %s: %d\n",
841 /* Make sure all DAPM widgets are freed */
842 snd_soc_dapm_free(&codec->dapm);
844 soc_cleanup_codec_debugfs(codec);
846 list_del(&codec->card_list);
847 module_put(codec->dev->driver->owner);
850 static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
852 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
853 struct snd_soc_codec *codec = rtd->codec;
854 struct snd_soc_platform *platform = rtd->platform;
855 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
858 /* unregister the rtd device */
859 if (rtd->dev_registered) {
860 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
861 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
862 device_unregister(&rtd->dev);
863 rtd->dev_registered = 0;
866 /* remove the CODEC DAI */
867 if (codec_dai && codec_dai->probed &&
868 codec_dai->driver->remove_order == order) {
869 if (codec_dai->driver->remove) {
870 err = codec_dai->driver->remove(codec_dai);
872 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
874 codec_dai->probed = 0;
875 list_del(&codec_dai->card_list);
878 /* remove the platform */
879 if (platform && platform->probed &&
880 platform->driver->remove_order == order) {
881 if (platform->driver->remove) {
882 err = platform->driver->remove(platform);
884 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
886 platform->probed = 0;
887 list_del(&platform->card_list);
888 module_put(platform->dev->driver->owner);
891 /* remove the CODEC */
892 if (codec && codec->probed &&
893 codec->driver->remove_order == order)
894 soc_remove_codec(codec);
896 /* remove the cpu_dai */
897 if (cpu_dai && cpu_dai->probed &&
898 cpu_dai->driver->remove_order == order) {
899 if (cpu_dai->driver->remove) {
900 err = cpu_dai->driver->remove(cpu_dai);
902 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
905 list_del(&cpu_dai->card_list);
906 module_put(cpu_dai->dev->driver->owner);
910 static void soc_remove_dai_links(struct snd_soc_card *card)
914 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
916 for (dai = 0; dai < card->num_rtd; dai++)
917 soc_remove_dai_link(card, dai, order);
922 static void soc_set_name_prefix(struct snd_soc_card *card,
923 struct snd_soc_codec *codec)
927 if (card->codec_conf == NULL)
930 for (i = 0; i < card->num_configs; i++) {
931 struct snd_soc_codec_conf *map = &card->codec_conf[i];
932 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
933 codec->name_prefix = map->name_prefix;
939 static int soc_probe_codec(struct snd_soc_card *card,
940 struct snd_soc_codec *codec)
943 const struct snd_soc_codec_driver *driver = codec->driver;
946 codec->dapm.card = card;
947 soc_set_name_prefix(card, codec);
949 if (!try_module_get(codec->dev->driver->owner))
952 soc_init_codec_debugfs(codec);
954 if (driver->dapm_widgets)
955 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
956 driver->num_dapm_widgets);
959 ret = driver->probe(codec);
962 "asoc: failed to probe CODEC %s: %d\n",
968 if (driver->controls)
969 snd_soc_add_controls(codec, driver->controls,
970 driver->num_controls);
971 if (driver->dapm_routes)
972 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
973 driver->num_dapm_routes);
975 /* mark codec as probed and add to card codec list */
977 list_add(&codec->card_list, &card->codec_dev_list);
978 list_add(&codec->dapm.list, &card->dapm_list);
983 soc_cleanup_codec_debugfs(codec);
984 module_put(codec->dev->driver->owner);
989 static int soc_probe_platform(struct snd_soc_card *card,
990 struct snd_soc_platform *platform)
993 const struct snd_soc_platform_driver *driver = platform->driver;
995 platform->card = card;
996 platform->dapm.card = card;
998 if (!try_module_get(platform->dev->driver->owner))
1001 if (driver->probe) {
1002 ret = driver->probe(platform);
1004 dev_err(platform->dev,
1005 "asoc: failed to probe platform %s: %d\n",
1006 platform->name, ret);
1011 /* mark platform as probed and add to card platform list */
1012 platform->probed = 1;
1013 list_add(&platform->card_list, &card->platform_dev_list);
1014 list_add(&platform->dapm.list, &card->dapm_list);
1019 module_put(platform->dev->driver->owner);
1024 static void rtd_release(struct device *dev) {}
1026 static int soc_post_component_init(struct snd_soc_card *card,
1027 struct snd_soc_codec *codec,
1028 int num, int dailess)
1030 struct snd_soc_dai_link *dai_link = NULL;
1031 struct snd_soc_aux_dev *aux_dev = NULL;
1032 struct snd_soc_pcm_runtime *rtd;
1033 const char *temp, *name;
1037 dai_link = &card->dai_link[num];
1038 rtd = &card->rtd[num];
1039 name = dai_link->name;
1041 aux_dev = &card->aux_dev[num];
1042 rtd = &card->rtd_aux[num];
1043 name = aux_dev->name;
1047 /* machine controls, routes and widgets are not prefixed */
1048 temp = codec->name_prefix;
1049 codec->name_prefix = NULL;
1051 /* do machine specific initialization */
1052 if (!dailess && dai_link->init)
1053 ret = dai_link->init(rtd);
1054 else if (dailess && aux_dev->init)
1055 ret = aux_dev->init(&codec->dapm);
1057 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1060 codec->name_prefix = temp;
1062 /* Make sure all DAPM widgets are instantiated */
1063 snd_soc_dapm_new_widgets(&codec->dapm);
1065 /* register the rtd device */
1067 rtd->dev.parent = card->dev;
1068 rtd->dev.release = rtd_release;
1069 rtd->dev.init_name = name;
1070 mutex_init(&rtd->pcm_mutex);
1071 ret = device_register(&rtd->dev);
1074 "asoc: failed to register runtime device: %d\n", ret);
1077 rtd->dev_registered = 1;
1079 /* add DAPM sysfs entries for this codec */
1080 ret = snd_soc_dapm_sys_add(&rtd->dev);
1083 "asoc: failed to add codec dapm sysfs entries: %d\n",
1086 /* add codec sysfs entries */
1087 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1090 "asoc: failed to add codec sysfs files: %d\n", ret);
1095 static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order)
1097 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1098 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1099 struct snd_soc_codec *codec = rtd->codec;
1100 struct snd_soc_platform *platform = rtd->platform;
1101 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1104 dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1105 card->name, num, order);
1107 /* config components */
1108 codec_dai->codec = codec;
1109 cpu_dai->platform = platform;
1110 codec_dai->card = card;
1111 cpu_dai->card = card;
1113 /* set default power off timeout */
1114 rtd->pmdown_time = pmdown_time;
1116 /* probe the cpu_dai */
1117 if (!cpu_dai->probed &&
1118 cpu_dai->driver->probe_order == order) {
1119 if (!try_module_get(cpu_dai->dev->driver->owner))
1122 if (cpu_dai->driver->probe) {
1123 ret = cpu_dai->driver->probe(cpu_dai);
1125 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1127 module_put(cpu_dai->dev->driver->owner);
1131 cpu_dai->probed = 1;
1132 /* mark cpu_dai as probed and add to card cpu_dai list */
1133 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1136 /* probe the CODEC */
1137 if (!codec->probed &&
1138 codec->driver->probe_order == order) {
1139 ret = soc_probe_codec(card, codec);
1144 /* probe the platform */
1145 if (!platform->probed &&
1146 platform->driver->probe_order == order) {
1147 ret = soc_probe_platform(card, platform);
1152 /* probe the CODEC DAI */
1153 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1154 if (codec_dai->driver->probe) {
1155 ret = codec_dai->driver->probe(codec_dai);
1157 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1163 /* mark cpu_dai as probed and add to card cpu_dai list */
1164 codec_dai->probed = 1;
1165 list_add(&codec_dai->card_list, &card->dai_dev_list);
1168 /* complete DAI probe during last probe */
1169 if (order != SND_SOC_COMP_ORDER_LAST)
1172 ret = soc_post_component_init(card, codec, num, 0);
1176 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1178 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1180 /* create the pcm */
1181 ret = soc_new_pcm(rtd, num);
1183 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1187 /* add platform data for AC97 devices */
1188 if (rtd->codec_dai->driver->ac97_control)
1189 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1194 #ifdef CONFIG_SND_SOC_AC97_BUS
1195 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1199 /* Only instantiate AC97 if not already done by the adaptor
1200 * for the generic AC97 subsystem.
1202 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1204 * It is possible that the AC97 device is already registered to
1205 * the device subsystem. This happens when the device is created
1206 * via snd_ac97_mixer(). Currently only SoC codec that does so
1207 * is the generic AC97 glue but others migh emerge.
1209 * In those cases we don't try to register the device again.
1211 if (!rtd->codec->ac97_created)
1214 ret = soc_ac97_dev_register(rtd->codec);
1216 printk(KERN_ERR "asoc: AC97 device register failed\n");
1220 rtd->codec->ac97_registered = 1;
1225 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1227 if (codec->ac97_registered) {
1228 soc_ac97_dev_unregister(codec);
1229 codec->ac97_registered = 0;
1234 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1236 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1237 struct snd_soc_codec *codec;
1240 /* find CODEC from registered CODECs*/
1241 list_for_each_entry(codec, &codec_list, list) {
1242 if (!strcmp(codec->name, aux_dev->codec_name)) {
1243 if (codec->probed) {
1245 "asoc: codec already probed");
1252 /* codec not found */
1253 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1257 ret = soc_probe_codec(card, codec);
1261 ret = soc_post_component_init(card, codec, num, 1);
1267 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1269 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1270 struct snd_soc_codec *codec = rtd->codec;
1272 /* unregister the rtd device */
1273 if (rtd->dev_registered) {
1274 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1275 device_unregister(&rtd->dev);
1276 rtd->dev_registered = 0;
1279 if (codec && codec->probed)
1280 soc_remove_codec(codec);
1283 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1284 enum snd_soc_compress_type compress_type)
1288 if (codec->cache_init)
1291 /* override the compress_type if necessary */
1292 if (compress_type && codec->compress_type != compress_type)
1293 codec->compress_type = compress_type;
1294 ret = snd_soc_cache_init(codec);
1296 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1300 codec->cache_init = 1;
1304 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1306 struct snd_soc_codec *codec;
1307 struct snd_soc_codec_conf *codec_conf;
1308 enum snd_soc_compress_type compress_type;
1311 mutex_lock(&card->mutex);
1313 if (card->instantiated) {
1314 mutex_unlock(&card->mutex);
1319 for (i = 0; i < card->num_links; i++)
1320 soc_bind_dai_link(card, i);
1322 /* bind completed ? */
1323 if (card->num_rtd != card->num_links) {
1324 mutex_unlock(&card->mutex);
1328 /* initialize the register cache for each available codec */
1329 list_for_each_entry(codec, &codec_list, list) {
1330 if (codec->cache_init)
1332 /* by default we don't override the compress_type */
1334 /* check to see if we need to override the compress_type */
1335 for (i = 0; i < card->num_configs; ++i) {
1336 codec_conf = &card->codec_conf[i];
1337 if (!strcmp(codec->name, codec_conf->dev_name)) {
1338 compress_type = codec_conf->compress_type;
1339 if (compress_type && compress_type
1340 != codec->compress_type)
1344 ret = snd_soc_init_codec_cache(codec, compress_type);
1346 mutex_unlock(&card->mutex);
1351 /* card bind complete so register a sound card */
1352 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1353 card->owner, 0, &card->snd_card);
1355 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1357 mutex_unlock(&card->mutex);
1360 card->snd_card->dev = card->dev;
1362 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1363 card->dapm.dev = card->dev;
1364 card->dapm.card = card;
1365 list_add(&card->dapm.list, &card->dapm_list);
1367 #ifdef CONFIG_DEBUG_FS
1368 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1371 #ifdef CONFIG_PM_SLEEP
1372 /* deferred resume work */
1373 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1376 if (card->dapm_widgets)
1377 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1378 card->num_dapm_widgets);
1380 /* initialise the sound card only once */
1382 ret = card->probe(card);
1384 goto card_probe_error;
1387 /* early DAI link probe */
1388 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1390 for (i = 0; i < card->num_links; i++) {
1391 ret = soc_probe_dai_link(card, i, order);
1393 pr_err("asoc: failed to instantiate card %s: %d\n",
1400 for (i = 0; i < card->num_aux_devs; i++) {
1401 ret = soc_probe_aux_dev(card, i);
1403 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1405 goto probe_aux_dev_err;
1409 /* We should have a non-codec control add function but we don't */
1411 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1412 struct snd_soc_codec,
1415 card->num_controls);
1417 if (card->dapm_routes)
1418 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1419 card->num_dapm_routes);
1421 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1423 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1424 "%s", card->long_name ? card->long_name : card->name);
1425 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1426 "%s", card->driver_name ? card->driver_name : card->name);
1428 if (card->late_probe) {
1429 ret = card->late_probe(card);
1431 dev_err(card->dev, "%s late_probe() failed: %d\n",
1433 goto probe_aux_dev_err;
1437 ret = snd_card_register(card->snd_card);
1439 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1440 goto probe_aux_dev_err;
1443 #ifdef CONFIG_SND_SOC_AC97_BUS
1444 /* register any AC97 codecs */
1445 for (i = 0; i < card->num_rtd; i++) {
1446 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1448 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1450 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1451 goto probe_aux_dev_err;
1456 card->instantiated = 1;
1457 mutex_unlock(&card->mutex);
1461 for (i = 0; i < card->num_aux_devs; i++)
1462 soc_remove_aux_dev(card, i);
1465 soc_remove_dai_links(card);
1471 snd_card_free(card->snd_card);
1473 mutex_unlock(&card->mutex);
1477 * Attempt to initialise any uninitialised cards. Must be called with
1480 static void snd_soc_instantiate_cards(void)
1482 struct snd_soc_card *card;
1483 list_for_each_entry(card, &card_list, list)
1484 snd_soc_instantiate_card(card);
1487 /* probes a new socdev */
1488 static int soc_probe(struct platform_device *pdev)
1490 struct snd_soc_card *card = platform_get_drvdata(pdev);
1494 * no card, so machine driver should be registering card
1495 * we should not be here in that case so ret error
1500 /* Bodge while we unpick instantiation */
1501 card->dev = &pdev->dev;
1503 ret = snd_soc_register_card(card);
1505 dev_err(&pdev->dev, "Failed to register card\n");
1512 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1516 /* make sure any delayed work runs */
1517 for (i = 0; i < card->num_rtd; i++) {
1518 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1519 flush_delayed_work_sync(&rtd->delayed_work);
1522 /* remove auxiliary devices */
1523 for (i = 0; i < card->num_aux_devs; i++)
1524 soc_remove_aux_dev(card, i);
1526 /* remove and free each DAI */
1527 soc_remove_dai_links(card);
1529 soc_cleanup_card_debugfs(card);
1531 /* remove the card */
1535 snd_soc_dapm_free(&card->dapm);
1538 snd_card_free(card->snd_card);
1543 /* removes a socdev */
1544 static int soc_remove(struct platform_device *pdev)
1546 struct snd_soc_card *card = platform_get_drvdata(pdev);
1548 snd_soc_unregister_card(card);
1552 int snd_soc_poweroff(struct device *dev)
1554 struct snd_soc_card *card = dev_get_drvdata(dev);
1557 if (!card->instantiated)
1560 /* Flush out pmdown_time work - we actually do want to run it
1561 * now, we're shutting down so no imminent restart. */
1562 for (i = 0; i < card->num_rtd; i++) {
1563 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1564 flush_delayed_work_sync(&rtd->delayed_work);
1567 snd_soc_dapm_shutdown(card);
1571 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1573 const struct dev_pm_ops snd_soc_pm_ops = {
1574 .suspend = snd_soc_suspend,
1575 .resume = snd_soc_resume,
1576 .poweroff = snd_soc_poweroff,
1578 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1580 /* ASoC platform driver */
1581 static struct platform_driver soc_driver = {
1583 .name = "soc-audio",
1584 .owner = THIS_MODULE,
1585 .pm = &snd_soc_pm_ops,
1588 .remove = soc_remove,
1592 * snd_soc_codec_volatile_register: Report if a register is volatile.
1594 * @codec: CODEC to query.
1595 * @reg: Register to query.
1597 * Boolean function indiciating if a CODEC register is volatile.
1599 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1602 if (codec->volatile_register)
1603 return codec->volatile_register(codec, reg);
1607 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1610 * snd_soc_codec_readable_register: Report if a register is readable.
1612 * @codec: CODEC to query.
1613 * @reg: Register to query.
1615 * Boolean function indicating if a CODEC register is readable.
1617 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1620 if (codec->readable_register)
1621 return codec->readable_register(codec, reg);
1625 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1628 * snd_soc_codec_writable_register: Report if a register is writable.
1630 * @codec: CODEC to query.
1631 * @reg: Register to query.
1633 * Boolean function indicating if a CODEC register is writable.
1635 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1638 if (codec->writable_register)
1639 return codec->writable_register(codec, reg);
1643 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1645 int snd_soc_platform_read(struct snd_soc_platform *platform,
1650 if (!platform->driver->read) {
1651 dev_err(platform->dev, "platform has no read back\n");
1655 ret = platform->driver->read(platform, reg);
1656 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
1660 EXPORT_SYMBOL_GPL(snd_soc_platform_read);
1662 int snd_soc_platform_write(struct snd_soc_platform *platform,
1663 unsigned int reg, unsigned int val)
1665 if (!platform->driver->write) {
1666 dev_err(platform->dev, "platform has no write back\n");
1670 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
1671 return platform->driver->write(platform, reg, val);
1673 EXPORT_SYMBOL_GPL(snd_soc_platform_write);
1676 * snd_soc_new_ac97_codec - initailise AC97 device
1677 * @codec: audio codec
1678 * @ops: AC97 bus operations
1679 * @num: AC97 codec number
1681 * Initialises AC97 codec resources for use by ad-hoc devices only.
1683 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1684 struct snd_ac97_bus_ops *ops, int num)
1686 mutex_lock(&codec->mutex);
1688 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1689 if (codec->ac97 == NULL) {
1690 mutex_unlock(&codec->mutex);
1694 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1695 if (codec->ac97->bus == NULL) {
1698 mutex_unlock(&codec->mutex);
1702 codec->ac97->bus->ops = ops;
1703 codec->ac97->num = num;
1706 * Mark the AC97 device to be created by us. This way we ensure that the
1707 * device will be registered with the device subsystem later on.
1709 codec->ac97_created = 1;
1711 mutex_unlock(&codec->mutex);
1714 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1717 * snd_soc_free_ac97_codec - free AC97 codec device
1718 * @codec: audio codec
1720 * Frees AC97 codec device resources.
1722 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1724 mutex_lock(&codec->mutex);
1725 #ifdef CONFIG_SND_SOC_AC97_BUS
1726 soc_unregister_ac97_dai_link(codec);
1728 kfree(codec->ac97->bus);
1731 codec->ac97_created = 0;
1732 mutex_unlock(&codec->mutex);
1734 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1736 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
1740 ret = codec->read(codec, reg);
1741 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1742 trace_snd_soc_reg_read(codec, reg, ret);
1746 EXPORT_SYMBOL_GPL(snd_soc_read);
1748 unsigned int snd_soc_write(struct snd_soc_codec *codec,
1749 unsigned int reg, unsigned int val)
1751 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
1752 trace_snd_soc_reg_write(codec, reg, val);
1753 return codec->write(codec, reg, val);
1755 EXPORT_SYMBOL_GPL(snd_soc_write);
1757 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
1758 unsigned int reg, const void *data, size_t len)
1760 return codec->bulk_write_raw(codec, reg, data, len);
1762 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
1765 * snd_soc_update_bits - update codec register bits
1766 * @codec: audio codec
1767 * @reg: codec register
1768 * @mask: register mask
1771 * Writes new register value.
1773 * Returns 1 for change, 0 for no change, or negative error code.
1775 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1776 unsigned int mask, unsigned int value)
1779 unsigned int old, new;
1782 ret = snd_soc_read(codec, reg);
1787 new = (old & ~mask) | (value & mask);
1788 change = old != new;
1790 ret = snd_soc_write(codec, reg, new);
1797 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1800 * snd_soc_update_bits_locked - update codec register bits
1801 * @codec: audio codec
1802 * @reg: codec register
1803 * @mask: register mask
1806 * Writes new register value, and takes the codec mutex.
1808 * Returns 1 for change else 0.
1810 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1811 unsigned short reg, unsigned int mask,
1816 mutex_lock(&codec->mutex);
1817 change = snd_soc_update_bits(codec, reg, mask, value);
1818 mutex_unlock(&codec->mutex);
1822 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1825 * snd_soc_test_bits - test register for change
1826 * @codec: audio codec
1827 * @reg: codec register
1828 * @mask: register mask
1831 * Tests a register with a new value and checks if the new value is
1832 * different from the old value.
1834 * Returns 1 for change else 0.
1836 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1837 unsigned int mask, unsigned int value)
1840 unsigned int old, new;
1842 old = snd_soc_read(codec, reg);
1843 new = (old & ~mask) | value;
1844 change = old != new;
1848 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1851 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1852 * @substream: the pcm substream
1853 * @hw: the hardware parameters
1855 * Sets the substream runtime hardware parameters.
1857 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1858 const struct snd_pcm_hardware *hw)
1860 struct snd_pcm_runtime *runtime = substream->runtime;
1861 runtime->hw.info = hw->info;
1862 runtime->hw.formats = hw->formats;
1863 runtime->hw.period_bytes_min = hw->period_bytes_min;
1864 runtime->hw.period_bytes_max = hw->period_bytes_max;
1865 runtime->hw.periods_min = hw->periods_min;
1866 runtime->hw.periods_max = hw->periods_max;
1867 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1868 runtime->hw.fifo_size = hw->fifo_size;
1871 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1874 * snd_soc_cnew - create new control
1875 * @_template: control template
1876 * @data: control private data
1877 * @long_name: control long name
1878 * @prefix: control name prefix
1880 * Create a new mixer control from a template control.
1882 * Returns 0 for success, else error.
1884 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1885 void *data, char *long_name,
1888 struct snd_kcontrol_new template;
1889 struct snd_kcontrol *kcontrol;
1893 memcpy(&template, _template, sizeof(template));
1897 long_name = template.name;
1900 name_len = strlen(long_name) + strlen(prefix) + 2;
1901 name = kmalloc(name_len, GFP_ATOMIC);
1905 snprintf(name, name_len, "%s %s", prefix, long_name);
1907 template.name = name;
1909 template.name = long_name;
1912 kcontrol = snd_ctl_new1(&template, data);
1918 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1921 * snd_soc_add_controls - add an array of controls to a codec.
1922 * Convienience function to add a list of controls. Many codecs were
1923 * duplicating this code.
1925 * @codec: codec to add controls to
1926 * @controls: array of controls to add
1927 * @num_controls: number of elements in the array
1929 * Return 0 for success, else error.
1931 int snd_soc_add_controls(struct snd_soc_codec *codec,
1932 const struct snd_kcontrol_new *controls, int num_controls)
1934 struct snd_card *card = codec->card->snd_card;
1937 for (i = 0; i < num_controls; i++) {
1938 const struct snd_kcontrol_new *control = &controls[i];
1939 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
1941 codec->name_prefix));
1943 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
1944 codec->name, control->name, err);
1951 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1954 * snd_soc_add_platform_controls - add an array of controls to a platform.
1955 * Convienience function to add a list of controls.
1957 * @platform: platform to add controls to
1958 * @controls: array of controls to add
1959 * @num_controls: number of elements in the array
1961 * Return 0 for success, else error.
1963 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1964 const struct snd_kcontrol_new *controls, int num_controls)
1966 struct snd_card *card = platform->card->snd_card;
1969 for (i = 0; i < num_controls; i++) {
1970 const struct snd_kcontrol_new *control = &controls[i];
1971 err = snd_ctl_add(card, snd_soc_cnew(control, platform,
1972 control->name, NULL));
1974 dev_err(platform->dev, "Failed to add %s %d\n",control->name, err);
1981 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1984 * snd_soc_info_enum_double - enumerated double mixer info callback
1985 * @kcontrol: mixer control
1986 * @uinfo: control element information
1988 * Callback to provide information about a double enumerated
1991 * Returns 0 for success.
1993 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1994 struct snd_ctl_elem_info *uinfo)
1996 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1998 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1999 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2000 uinfo->value.enumerated.items = e->max;
2002 if (uinfo->value.enumerated.item > e->max - 1)
2003 uinfo->value.enumerated.item = e->max - 1;
2004 strcpy(uinfo->value.enumerated.name,
2005 e->texts[uinfo->value.enumerated.item]);
2008 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2011 * snd_soc_get_enum_double - enumerated double mixer get callback
2012 * @kcontrol: mixer control
2013 * @ucontrol: control element information
2015 * Callback to get the value of a double enumerated mixer.
2017 * Returns 0 for success.
2019 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2020 struct snd_ctl_elem_value *ucontrol)
2022 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2023 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2024 unsigned int val, bitmask;
2026 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2028 val = snd_soc_read(codec, e->reg);
2029 ucontrol->value.enumerated.item[0]
2030 = (val >> e->shift_l) & (bitmask - 1);
2031 if (e->shift_l != e->shift_r)
2032 ucontrol->value.enumerated.item[1] =
2033 (val >> e->shift_r) & (bitmask - 1);
2037 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2040 * snd_soc_put_enum_double - enumerated double mixer put callback
2041 * @kcontrol: mixer control
2042 * @ucontrol: control element information
2044 * Callback to set the value of a double enumerated mixer.
2046 * Returns 0 for success.
2048 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2049 struct snd_ctl_elem_value *ucontrol)
2051 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2052 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2054 unsigned int mask, bitmask;
2056 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2058 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2060 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2061 mask = (bitmask - 1) << e->shift_l;
2062 if (e->shift_l != e->shift_r) {
2063 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2065 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2066 mask |= (bitmask - 1) << e->shift_r;
2069 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2071 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2074 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2075 * @kcontrol: mixer control
2076 * @ucontrol: control element information
2078 * Callback to get the value of a double semi enumerated mixer.
2080 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2081 * used for handling bitfield coded enumeration for example.
2083 * Returns 0 for success.
2085 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2086 struct snd_ctl_elem_value *ucontrol)
2088 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2089 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2090 unsigned int reg_val, val, mux;
2092 reg_val = snd_soc_read(codec, e->reg);
2093 val = (reg_val >> e->shift_l) & e->mask;
2094 for (mux = 0; mux < e->max; mux++) {
2095 if (val == e->values[mux])
2098 ucontrol->value.enumerated.item[0] = mux;
2099 if (e->shift_l != e->shift_r) {
2100 val = (reg_val >> e->shift_r) & e->mask;
2101 for (mux = 0; mux < e->max; mux++) {
2102 if (val == e->values[mux])
2105 ucontrol->value.enumerated.item[1] = mux;
2110 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2113 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2114 * @kcontrol: mixer control
2115 * @ucontrol: control element information
2117 * Callback to set the value of a double semi enumerated mixer.
2119 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2120 * used for handling bitfield coded enumeration for example.
2122 * Returns 0 for success.
2124 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2125 struct snd_ctl_elem_value *ucontrol)
2127 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2128 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2132 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2134 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2135 mask = e->mask << e->shift_l;
2136 if (e->shift_l != e->shift_r) {
2137 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2139 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2140 mask |= e->mask << e->shift_r;
2143 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2145 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2148 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2149 * @kcontrol: mixer control
2150 * @uinfo: control element information
2152 * Callback to provide information about an external enumerated
2155 * Returns 0 for success.
2157 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2158 struct snd_ctl_elem_info *uinfo)
2160 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2162 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2164 uinfo->value.enumerated.items = e->max;
2166 if (uinfo->value.enumerated.item > e->max - 1)
2167 uinfo->value.enumerated.item = e->max - 1;
2168 strcpy(uinfo->value.enumerated.name,
2169 e->texts[uinfo->value.enumerated.item]);
2172 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2175 * snd_soc_info_volsw_ext - external single mixer info callback
2176 * @kcontrol: mixer control
2177 * @uinfo: control element information
2179 * Callback to provide information about a single external mixer control.
2181 * Returns 0 for success.
2183 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2184 struct snd_ctl_elem_info *uinfo)
2186 int max = kcontrol->private_value;
2188 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2189 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2191 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2194 uinfo->value.integer.min = 0;
2195 uinfo->value.integer.max = max;
2198 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2201 * snd_soc_info_volsw - single mixer info callback
2202 * @kcontrol: mixer control
2203 * @uinfo: control element information
2205 * Callback to provide information about a single mixer control.
2207 * Returns 0 for success.
2209 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2210 struct snd_ctl_elem_info *uinfo)
2212 struct soc_mixer_control *mc =
2213 (struct soc_mixer_control *)kcontrol->private_value;
2215 unsigned int shift = mc->shift;
2216 unsigned int rshift = mc->rshift;
2218 if (!mc->platform_max)
2219 mc->platform_max = mc->max;
2220 platform_max = mc->platform_max;
2222 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2223 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2225 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2227 uinfo->count = shift == rshift ? 1 : 2;
2228 uinfo->value.integer.min = 0;
2229 uinfo->value.integer.max = platform_max;
2232 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2235 * snd_soc_get_volsw - single mixer get callback
2236 * @kcontrol: mixer control
2237 * @ucontrol: control element information
2239 * Callback to get the value of a single mixer control.
2241 * Returns 0 for success.
2243 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2244 struct snd_ctl_elem_value *ucontrol)
2246 struct soc_mixer_control *mc =
2247 (struct soc_mixer_control *)kcontrol->private_value;
2248 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2249 unsigned int reg = mc->reg;
2250 unsigned int shift = mc->shift;
2251 unsigned int rshift = mc->rshift;
2253 unsigned int mask = (1 << fls(max)) - 1;
2254 unsigned int invert = mc->invert;
2256 ucontrol->value.integer.value[0] =
2257 (snd_soc_read(codec, reg) >> shift) & mask;
2258 if (shift != rshift)
2259 ucontrol->value.integer.value[1] =
2260 (snd_soc_read(codec, reg) >> rshift) & mask;
2262 ucontrol->value.integer.value[0] =
2263 max - ucontrol->value.integer.value[0];
2264 if (shift != rshift)
2265 ucontrol->value.integer.value[1] =
2266 max - ucontrol->value.integer.value[1];
2271 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2274 * snd_soc_put_volsw - single mixer put callback
2275 * @kcontrol: mixer control
2276 * @ucontrol: control element information
2278 * Callback to set the value of a single mixer control.
2280 * Returns 0 for success.
2282 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2283 struct snd_ctl_elem_value *ucontrol)
2285 struct soc_mixer_control *mc =
2286 (struct soc_mixer_control *)kcontrol->private_value;
2287 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2288 unsigned int reg = mc->reg;
2289 unsigned int shift = mc->shift;
2290 unsigned int rshift = mc->rshift;
2292 unsigned int mask = (1 << fls(max)) - 1;
2293 unsigned int invert = mc->invert;
2294 unsigned int val, val2, val_mask;
2296 val = (ucontrol->value.integer.value[0] & mask);
2299 val_mask = mask << shift;
2301 if (shift != rshift) {
2302 val2 = (ucontrol->value.integer.value[1] & mask);
2305 val_mask |= mask << rshift;
2306 val |= val2 << rshift;
2308 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2310 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2313 * snd_soc_info_volsw_2r - double mixer info callback
2314 * @kcontrol: mixer control
2315 * @uinfo: control element information
2317 * Callback to provide information about a double mixer control that
2318 * spans 2 codec registers.
2320 * Returns 0 for success.
2322 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2323 struct snd_ctl_elem_info *uinfo)
2325 struct soc_mixer_control *mc =
2326 (struct soc_mixer_control *)kcontrol->private_value;
2329 if (!mc->platform_max)
2330 mc->platform_max = mc->max;
2331 platform_max = mc->platform_max;
2333 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2334 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2336 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2339 uinfo->value.integer.min = 0;
2340 uinfo->value.integer.max = platform_max;
2343 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2346 * snd_soc_get_volsw_2r - double mixer get callback
2347 * @kcontrol: mixer control
2348 * @ucontrol: control element information
2350 * Callback to get the value of a double mixer control that spans 2 registers.
2352 * Returns 0 for success.
2354 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2355 struct snd_ctl_elem_value *ucontrol)
2357 struct soc_mixer_control *mc =
2358 (struct soc_mixer_control *)kcontrol->private_value;
2359 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2360 unsigned int reg = mc->reg;
2361 unsigned int reg2 = mc->rreg;
2362 unsigned int shift = mc->shift;
2364 unsigned int mask = (1 << fls(max)) - 1;
2365 unsigned int invert = mc->invert;
2367 ucontrol->value.integer.value[0] =
2368 (snd_soc_read(codec, reg) >> shift) & mask;
2369 ucontrol->value.integer.value[1] =
2370 (snd_soc_read(codec, reg2) >> shift) & mask;
2372 ucontrol->value.integer.value[0] =
2373 max - ucontrol->value.integer.value[0];
2374 ucontrol->value.integer.value[1] =
2375 max - ucontrol->value.integer.value[1];
2380 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2383 * snd_soc_put_volsw_2r - double mixer set callback
2384 * @kcontrol: mixer control
2385 * @ucontrol: control element information
2387 * Callback to set the value of a double mixer control that spans 2 registers.
2389 * Returns 0 for success.
2391 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2392 struct snd_ctl_elem_value *ucontrol)
2394 struct soc_mixer_control *mc =
2395 (struct soc_mixer_control *)kcontrol->private_value;
2396 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2397 unsigned int reg = mc->reg;
2398 unsigned int reg2 = mc->rreg;
2399 unsigned int shift = mc->shift;
2401 unsigned int mask = (1 << fls(max)) - 1;
2402 unsigned int invert = mc->invert;
2404 unsigned int val, val2, val_mask;
2406 val_mask = mask << shift;
2407 val = (ucontrol->value.integer.value[0] & mask);
2408 val2 = (ucontrol->value.integer.value[1] & mask);
2416 val2 = val2 << shift;
2418 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2422 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2425 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2428 * snd_soc_info_volsw_s8 - signed mixer info callback
2429 * @kcontrol: mixer control
2430 * @uinfo: control element information
2432 * Callback to provide information about a signed mixer control.
2434 * Returns 0 for success.
2436 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2437 struct snd_ctl_elem_info *uinfo)
2439 struct soc_mixer_control *mc =
2440 (struct soc_mixer_control *)kcontrol->private_value;
2444 if (!mc->platform_max)
2445 mc->platform_max = mc->max;
2446 platform_max = mc->platform_max;
2448 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2450 uinfo->value.integer.min = 0;
2451 uinfo->value.integer.max = platform_max - min;
2454 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2457 * snd_soc_get_volsw_s8 - signed mixer get callback
2458 * @kcontrol: mixer control
2459 * @ucontrol: control element information
2461 * Callback to get the value of a signed mixer control.
2463 * Returns 0 for success.
2465 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2466 struct snd_ctl_elem_value *ucontrol)
2468 struct soc_mixer_control *mc =
2469 (struct soc_mixer_control *)kcontrol->private_value;
2470 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2471 unsigned int reg = mc->reg;
2473 int val = snd_soc_read(codec, reg);
2475 ucontrol->value.integer.value[0] =
2476 ((signed char)(val & 0xff))-min;
2477 ucontrol->value.integer.value[1] =
2478 ((signed char)((val >> 8) & 0xff))-min;
2481 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2484 * snd_soc_put_volsw_sgn - signed mixer put callback
2485 * @kcontrol: mixer control
2486 * @ucontrol: control element information
2488 * Callback to set the value of a signed mixer control.
2490 * Returns 0 for success.
2492 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2493 struct snd_ctl_elem_value *ucontrol)
2495 struct soc_mixer_control *mc =
2496 (struct soc_mixer_control *)kcontrol->private_value;
2497 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2498 unsigned int reg = mc->reg;
2502 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2503 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2505 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2507 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2510 * snd_soc_limit_volume - Set new limit to an existing volume control.
2512 * @codec: where to look for the control
2513 * @name: Name of the control
2514 * @max: new maximum limit
2516 * Return 0 for success, else error.
2518 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2519 const char *name, int max)
2521 struct snd_card *card = codec->card->snd_card;
2522 struct snd_kcontrol *kctl;
2523 struct soc_mixer_control *mc;
2527 /* Sanity check for name and max */
2528 if (unlikely(!name || max <= 0))
2531 list_for_each_entry(kctl, &card->controls, list) {
2532 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2538 mc = (struct soc_mixer_control *)kctl->private_value;
2539 if (max <= mc->max) {
2540 mc->platform_max = max;
2546 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2549 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2550 * mixer info callback
2551 * @kcontrol: mixer control
2552 * @uinfo: control element information
2554 * Returns 0 for success.
2556 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2557 struct snd_ctl_elem_info *uinfo)
2559 struct soc_mixer_control *mc =
2560 (struct soc_mixer_control *)kcontrol->private_value;
2564 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2566 uinfo->value.integer.min = 0;
2567 uinfo->value.integer.max = max-min;
2571 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2574 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2575 * mixer get callback
2576 * @kcontrol: mixer control
2577 * @uinfo: control element information
2579 * Returns 0 for success.
2581 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2582 struct snd_ctl_elem_value *ucontrol)
2584 struct soc_mixer_control *mc =
2585 (struct soc_mixer_control *)kcontrol->private_value;
2586 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2587 unsigned int mask = (1<<mc->shift)-1;
2589 int val = snd_soc_read(codec, mc->reg) & mask;
2590 int valr = snd_soc_read(codec, mc->rreg) & mask;
2592 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2593 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2596 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2599 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2600 * mixer put callback
2601 * @kcontrol: mixer control
2602 * @uinfo: control element information
2604 * Returns 0 for success.
2606 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2607 struct snd_ctl_elem_value *ucontrol)
2609 struct soc_mixer_control *mc =
2610 (struct soc_mixer_control *)kcontrol->private_value;
2611 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2612 unsigned int mask = (1<<mc->shift)-1;
2615 unsigned int val, valr, oval, ovalr;
2617 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2619 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2622 oval = snd_soc_read(codec, mc->reg) & mask;
2623 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2627 ret = snd_soc_write(codec, mc->reg, val);
2631 if (ovalr != valr) {
2632 ret = snd_soc_write(codec, mc->rreg, valr);
2639 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2642 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2644 * @clk_id: DAI specific clock ID
2645 * @freq: new clock frequency in Hz
2646 * @dir: new clock direction - input/output.
2648 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2650 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2651 unsigned int freq, int dir)
2653 if (dai->driver && dai->driver->ops->set_sysclk)
2654 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2655 else if (dai->codec && dai->codec->driver->set_sysclk)
2656 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
2661 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2664 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2666 * @clk_id: DAI specific clock ID
2667 * @freq: new clock frequency in Hz
2668 * @dir: new clock direction - input/output.
2670 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2672 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2673 unsigned int freq, int dir)
2675 if (codec->driver->set_sysclk)
2676 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
2680 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2683 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2685 * @div_id: DAI specific clock divider ID
2686 * @div: new clock divisor.
2688 * Configures the clock dividers. This is used to derive the best DAI bit and
2689 * frame clocks from the system or master clock. It's best to set the DAI bit
2690 * and frame clocks as low as possible to save system power.
2692 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2693 int div_id, int div)
2695 if (dai->driver && dai->driver->ops->set_clkdiv)
2696 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2700 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2703 * snd_soc_dai_set_pll - configure DAI PLL.
2705 * @pll_id: DAI specific PLL ID
2706 * @source: DAI specific source for the PLL
2707 * @freq_in: PLL input clock frequency in Hz
2708 * @freq_out: requested PLL output clock frequency in Hz
2710 * Configures and enables PLL to generate output clock based on input clock.
2712 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2713 unsigned int freq_in, unsigned int freq_out)
2715 if (dai->driver && dai->driver->ops->set_pll)
2716 return dai->driver->ops->set_pll(dai, pll_id, source,
2718 else if (dai->codec && dai->codec->driver->set_pll)
2719 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2724 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2727 * snd_soc_codec_set_pll - configure codec PLL.
2729 * @pll_id: DAI specific PLL ID
2730 * @source: DAI specific source for the PLL
2731 * @freq_in: PLL input clock frequency in Hz
2732 * @freq_out: requested PLL output clock frequency in Hz
2734 * Configures and enables PLL to generate output clock based on input clock.
2736 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2737 unsigned int freq_in, unsigned int freq_out)
2739 if (codec->driver->set_pll)
2740 return codec->driver->set_pll(codec, pll_id, source,
2745 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2748 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2750 * @fmt: SND_SOC_DAIFMT_ format value.
2752 * Configures the DAI hardware format and clocking.
2754 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2756 if (dai->driver && dai->driver->ops->set_fmt)
2757 return dai->driver->ops->set_fmt(dai, fmt);
2761 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2764 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2766 * @tx_mask: bitmask representing active TX slots.
2767 * @rx_mask: bitmask representing active RX slots.
2768 * @slots: Number of slots in use.
2769 * @slot_width: Width in bits for each slot.
2771 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2774 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2775 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2777 if (dai->driver && dai->driver->ops->set_tdm_slot)
2778 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2783 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2786 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2788 * @tx_num: how many TX channels
2789 * @tx_slot: pointer to an array which imply the TX slot number channel
2791 * @rx_num: how many RX channels
2792 * @rx_slot: pointer to an array which imply the RX slot number channel
2795 * configure the relationship between channel number and TDM slot number.
2797 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2798 unsigned int tx_num, unsigned int *tx_slot,
2799 unsigned int rx_num, unsigned int *rx_slot)
2801 if (dai->driver && dai->driver->ops->set_channel_map)
2802 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2807 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2810 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2812 * @tristate: tristate enable
2814 * Tristates the DAI so that others can use it.
2816 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2818 if (dai->driver && dai->driver->ops->set_tristate)
2819 return dai->driver->ops->set_tristate(dai, tristate);
2823 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2826 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2828 * @mute: mute enable
2830 * Mutes the DAI DAC.
2832 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2834 if (dai->driver && dai->driver->ops->digital_mute)
2835 return dai->driver->ops->digital_mute(dai, mute);
2839 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2842 * snd_soc_register_card - Register a card with the ASoC core
2844 * @card: Card to register
2847 int snd_soc_register_card(struct snd_soc_card *card)
2851 if (!card->name || !card->dev)
2854 dev_set_drvdata(card->dev, card);
2856 snd_soc_initialize_card_lists(card);
2858 soc_init_card_debugfs(card);
2860 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
2861 (card->num_links + card->num_aux_devs),
2863 if (card->rtd == NULL)
2865 card->rtd_aux = &card->rtd[card->num_links];
2867 for (i = 0; i < card->num_links; i++)
2868 card->rtd[i].dai_link = &card->dai_link[i];
2870 INIT_LIST_HEAD(&card->list);
2871 card->instantiated = 0;
2872 mutex_init(&card->mutex);
2874 mutex_lock(&client_mutex);
2875 list_add(&card->list, &card_list);
2876 snd_soc_instantiate_cards();
2877 mutex_unlock(&client_mutex);
2879 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2883 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2886 * snd_soc_unregister_card - Unregister a card with the ASoC core
2888 * @card: Card to unregister
2891 int snd_soc_unregister_card(struct snd_soc_card *card)
2893 if (card->instantiated)
2894 soc_cleanup_card_resources(card);
2895 mutex_lock(&client_mutex);
2896 list_del(&card->list);
2897 mutex_unlock(&client_mutex);
2898 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2902 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2905 * Simplify DAI link configuration by removing ".-1" from device names
2906 * and sanitizing names.
2908 static char *fmt_single_name(struct device *dev, int *id)
2910 char *found, name[NAME_SIZE];
2913 if (dev_name(dev) == NULL)
2916 strlcpy(name, dev_name(dev), NAME_SIZE);
2918 /* are we a "%s.%d" name (platform and SPI components) */
2919 found = strstr(name, dev->driver->name);
2922 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2924 /* discard ID from name if ID == -1 */
2926 found[strlen(dev->driver->name)] = '\0';
2930 /* I2C component devices are named "bus-addr" */
2931 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2932 char tmp[NAME_SIZE];
2934 /* create unique ID number from I2C addr and bus */
2935 *id = ((id1 & 0xffff) << 16) + id2;
2937 /* sanitize component name for DAI link creation */
2938 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2939 strlcpy(name, tmp, NAME_SIZE);
2944 return kstrdup(name, GFP_KERNEL);
2948 * Simplify DAI link naming for single devices with multiple DAIs by removing
2949 * any ".-1" and using the DAI name (instead of device name).
2951 static inline char *fmt_multiple_name(struct device *dev,
2952 struct snd_soc_dai_driver *dai_drv)
2954 if (dai_drv->name == NULL) {
2955 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
2960 return kstrdup(dai_drv->name, GFP_KERNEL);
2964 * snd_soc_register_dai - Register a DAI with the ASoC core
2966 * @dai: DAI to register
2968 int snd_soc_register_dai(struct device *dev,
2969 struct snd_soc_dai_driver *dai_drv)
2971 struct snd_soc_dai *dai;
2973 dev_dbg(dev, "dai register %s\n", dev_name(dev));
2975 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2979 /* create DAI component name */
2980 dai->name = fmt_single_name(dev, &dai->id);
2981 if (dai->name == NULL) {
2987 dai->driver = dai_drv;
2988 if (!dai->driver->ops)
2989 dai->driver->ops = &null_dai_ops;
2991 mutex_lock(&client_mutex);
2992 list_add(&dai->list, &dai_list);
2993 snd_soc_instantiate_cards();
2994 mutex_unlock(&client_mutex);
2996 pr_debug("Registered DAI '%s'\n", dai->name);
3000 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3003 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3005 * @dai: DAI to unregister
3007 void snd_soc_unregister_dai(struct device *dev)
3009 struct snd_soc_dai *dai;
3011 list_for_each_entry(dai, &dai_list, list) {
3012 if (dev == dai->dev)
3018 mutex_lock(&client_mutex);
3019 list_del(&dai->list);
3020 mutex_unlock(&client_mutex);
3022 pr_debug("Unregistered DAI '%s'\n", dai->name);
3026 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3029 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3031 * @dai: Array of DAIs to register
3032 * @count: Number of DAIs
3034 int snd_soc_register_dais(struct device *dev,
3035 struct snd_soc_dai_driver *dai_drv, size_t count)
3037 struct snd_soc_dai *dai;
3040 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3042 for (i = 0; i < count; i++) {
3044 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3050 /* create DAI component name */
3051 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3052 if (dai->name == NULL) {
3059 dai->driver = &dai_drv[i];
3060 if (dai->driver->id)
3061 dai->id = dai->driver->id;
3064 if (!dai->driver->ops)
3065 dai->driver->ops = &null_dai_ops;
3067 mutex_lock(&client_mutex);
3068 list_add(&dai->list, &dai_list);
3069 mutex_unlock(&client_mutex);
3071 pr_debug("Registered DAI '%s'\n", dai->name);
3074 mutex_lock(&client_mutex);
3075 snd_soc_instantiate_cards();
3076 mutex_unlock(&client_mutex);
3080 for (i--; i >= 0; i--)
3081 snd_soc_unregister_dai(dev);
3085 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3088 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3090 * @dai: Array of DAIs to unregister
3091 * @count: Number of DAIs
3093 void snd_soc_unregister_dais(struct device *dev, size_t count)
3097 for (i = 0; i < count; i++)
3098 snd_soc_unregister_dai(dev);
3100 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3103 * snd_soc_register_platform - Register a platform with the ASoC core
3105 * @platform: platform to register
3107 int snd_soc_register_platform(struct device *dev,
3108 struct snd_soc_platform_driver *platform_drv)
3110 struct snd_soc_platform *platform;
3112 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3114 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3115 if (platform == NULL)
3118 /* create platform component name */
3119 platform->name = fmt_single_name(dev, &platform->id);
3120 if (platform->name == NULL) {
3125 platform->dev = dev;
3126 platform->driver = platform_drv;
3127 platform->dapm.dev = dev;
3128 platform->dapm.platform = platform;
3130 mutex_lock(&client_mutex);
3131 list_add(&platform->list, &platform_list);
3132 snd_soc_instantiate_cards();
3133 mutex_unlock(&client_mutex);
3135 pr_debug("Registered platform '%s'\n", platform->name);
3139 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3142 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3144 * @platform: platform to unregister
3146 void snd_soc_unregister_platform(struct device *dev)
3148 struct snd_soc_platform *platform;
3150 list_for_each_entry(platform, &platform_list, list) {
3151 if (dev == platform->dev)
3157 mutex_lock(&client_mutex);
3158 list_del(&platform->list);
3159 mutex_unlock(&client_mutex);
3161 pr_debug("Unregistered platform '%s'\n", platform->name);
3162 kfree(platform->name);
3165 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3167 static u64 codec_format_map[] = {
3168 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3169 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3170 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3171 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3172 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3173 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3174 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3175 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3176 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3177 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3178 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3179 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3180 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3181 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3182 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3183 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3186 /* Fix up the DAI formats for endianness: codecs don't actually see
3187 * the endianness of the data but we're using the CPU format
3188 * definitions which do need to include endianness so we ensure that
3189 * codec DAIs always have both big and little endian variants set.
3191 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3195 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3196 if (stream->formats & codec_format_map[i])
3197 stream->formats |= codec_format_map[i];
3201 * snd_soc_register_codec - Register a codec with the ASoC core
3203 * @codec: codec to register
3205 int snd_soc_register_codec(struct device *dev,
3206 const struct snd_soc_codec_driver *codec_drv,
3207 struct snd_soc_dai_driver *dai_drv,
3211 struct snd_soc_codec *codec;
3214 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3216 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3220 /* create CODEC component name */
3221 codec->name = fmt_single_name(dev, &codec->id);
3222 if (codec->name == NULL) {
3227 if (codec_drv->compress_type)
3228 codec->compress_type = codec_drv->compress_type;
3230 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3232 codec->write = codec_drv->write;
3233 codec->read = codec_drv->read;
3234 codec->volatile_register = codec_drv->volatile_register;
3235 codec->readable_register = codec_drv->readable_register;
3236 codec->writable_register = codec_drv->writable_register;
3237 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3238 codec->dapm.dev = dev;
3239 codec->dapm.codec = codec;
3240 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3242 codec->driver = codec_drv;
3243 codec->num_dai = num_dai;
3244 mutex_init(&codec->mutex);
3246 /* allocate CODEC register cache */
3247 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3248 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3249 codec->reg_size = reg_size;
3250 /* it is necessary to make a copy of the default register cache
3251 * because in the case of using a compression type that requires
3252 * the default register cache to be marked as __devinitconst the
3253 * kernel might have freed the array by the time we initialize
3256 if (codec_drv->reg_cache_default) {
3257 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3258 reg_size, GFP_KERNEL);
3259 if (!codec->reg_def_copy) {
3266 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3267 if (!codec->volatile_register)
3268 codec->volatile_register = snd_soc_default_volatile_register;
3269 if (!codec->readable_register)
3270 codec->readable_register = snd_soc_default_readable_register;
3271 if (!codec->writable_register)
3272 codec->writable_register = snd_soc_default_writable_register;
3275 for (i = 0; i < num_dai; i++) {
3276 fixup_codec_formats(&dai_drv[i].playback);
3277 fixup_codec_formats(&dai_drv[i].capture);
3280 /* register any DAIs */
3282 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3287 mutex_lock(&client_mutex);
3288 list_add(&codec->list, &codec_list);
3289 snd_soc_instantiate_cards();
3290 mutex_unlock(&client_mutex);
3292 pr_debug("Registered codec '%s'\n", codec->name);
3296 kfree(codec->reg_def_copy);
3297 codec->reg_def_copy = NULL;
3302 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3305 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3307 * @codec: codec to unregister
3309 void snd_soc_unregister_codec(struct device *dev)
3311 struct snd_soc_codec *codec;
3314 list_for_each_entry(codec, &codec_list, list) {
3315 if (dev == codec->dev)
3322 for (i = 0; i < codec->num_dai; i++)
3323 snd_soc_unregister_dai(dev);
3325 mutex_lock(&client_mutex);
3326 list_del(&codec->list);
3327 mutex_unlock(&client_mutex);
3329 pr_debug("Unregistered codec '%s'\n", codec->name);
3331 snd_soc_cache_exit(codec);
3332 kfree(codec->reg_def_copy);
3336 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3338 static int __init snd_soc_init(void)
3340 #ifdef CONFIG_DEBUG_FS
3341 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3342 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3344 "ASoC: Failed to create debugfs directory\n");
3345 snd_soc_debugfs_root = NULL;
3348 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3350 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3352 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3354 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3356 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3357 &platform_list_fops))
3358 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3361 snd_soc_util_init();
3363 return platform_driver_register(&soc_driver);
3365 module_init(snd_soc_init);
3367 static void __exit snd_soc_exit(void)
3369 snd_soc_util_exit();
3371 #ifdef CONFIG_DEBUG_FS
3372 debugfs_remove_recursive(snd_soc_debugfs_root);
3374 platform_driver_unregister(&soc_driver);
3376 module_exit(snd_soc_exit);
3378 /* Module information */
3379 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3380 MODULE_DESCRIPTION("ALSA SoC Core");
3381 MODULE_LICENSE("GPL");
3382 MODULE_ALIAS("platform:soc-audio");