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/ctype.h>
34 #include <linux/slab.h>
36 #include <sound/ac97_codec.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
42 #include <sound/initval.h>
44 #define CREATE_TRACE_POINTS
45 #include <trace/events/asoc.h>
49 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
51 #ifdef CONFIG_DEBUG_FS
52 struct dentry *snd_soc_debugfs_root;
53 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
56 static DEFINE_MUTEX(client_mutex);
57 static LIST_HEAD(card_list);
58 static LIST_HEAD(dai_list);
59 static LIST_HEAD(platform_list);
60 static LIST_HEAD(codec_list);
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 (!snd_soc_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 = dev_get_drvdata(dev);
174 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
179 static ssize_t pmdown_time_show(struct device *dev,
180 struct device_attribute *attr, char *buf)
182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
184 return sprintf(buf, "%ld\n", rtd->pmdown_time);
187 static ssize_t pmdown_time_set(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
191 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
194 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
201 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
203 #ifdef CONFIG_DEBUG_FS
204 static int codec_reg_open_file(struct inode *inode, struct file *file)
206 file->private_data = inode->i_private;
210 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
211 size_t count, loff_t *ppos)
214 struct snd_soc_codec *codec = file->private_data;
217 if (*ppos < 0 || !count)
220 buf = kmalloc(count, GFP_KERNEL);
224 ret = soc_codec_reg_show(codec, buf, count, *ppos);
226 if (copy_to_user(user_buf, buf, ret)) {
237 static ssize_t codec_reg_write_file(struct file *file,
238 const char __user *user_buf, size_t count, loff_t *ppos)
243 unsigned long reg, value;
244 struct snd_soc_codec *codec = file->private_data;
246 buf_size = min(count, (sizeof(buf)-1));
247 if (copy_from_user(buf, user_buf, buf_size))
251 while (*start == ' ')
253 reg = simple_strtoul(start, &start, 16);
254 while (*start == ' ')
256 if (strict_strtoul(start, 16, &value))
259 /* Userspace has been fiddling around behind the kernel's back */
260 add_taint(TAINT_USER);
262 snd_soc_write(codec, reg, value);
266 static const struct file_operations codec_reg_fops = {
267 .open = codec_reg_open_file,
268 .read = codec_reg_read_file,
269 .write = codec_reg_write_file,
270 .llseek = default_llseek,
273 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
275 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
277 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
279 if (!codec->debugfs_codec_root) {
281 "ASoC: Failed to create codec debugfs directory\n");
285 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
287 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
290 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
291 codec->debugfs_codec_root,
292 codec, &codec_reg_fops);
293 if (!codec->debugfs_reg)
295 "ASoC: Failed to create codec register debugfs file\n");
297 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
300 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
302 debugfs_remove_recursive(codec->debugfs_codec_root);
305 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
306 size_t count, loff_t *ppos)
308 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
309 ssize_t len, ret = 0;
310 struct snd_soc_codec *codec;
315 list_for_each_entry(codec, &codec_list, list) {
316 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
320 if (ret > PAGE_SIZE) {
327 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
334 static const struct file_operations codec_list_fops = {
335 .read = codec_list_read_file,
336 .llseek = default_llseek,/* read accesses f_pos */
339 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
340 size_t count, loff_t *ppos)
342 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
343 ssize_t len, ret = 0;
344 struct snd_soc_dai *dai;
349 list_for_each_entry(dai, &dai_list, list) {
350 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
353 if (ret > PAGE_SIZE) {
359 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
366 static const struct file_operations dai_list_fops = {
367 .read = dai_list_read_file,
368 .llseek = default_llseek,/* read accesses f_pos */
371 static ssize_t platform_list_read_file(struct file *file,
372 char __user *user_buf,
373 size_t count, loff_t *ppos)
375 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
376 ssize_t len, ret = 0;
377 struct snd_soc_platform *platform;
382 list_for_each_entry(platform, &platform_list, list) {
383 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
387 if (ret > PAGE_SIZE) {
393 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
400 static const struct file_operations platform_list_fops = {
401 .read = platform_list_read_file,
402 .llseek = default_llseek,/* read accesses f_pos */
405 static void soc_init_card_debugfs(struct snd_soc_card *card)
407 card->debugfs_card_root = debugfs_create_dir(card->name,
408 snd_soc_debugfs_root);
409 if (!card->debugfs_card_root) {
411 "ASoC: Failed to create card debugfs directory\n");
415 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
416 card->debugfs_card_root,
418 if (!card->debugfs_pop_time)
420 "Failed to create pop time debugfs file\n");
423 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
425 debugfs_remove_recursive(card->debugfs_card_root);
430 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
434 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
438 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
442 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
447 #ifdef CONFIG_SND_SOC_AC97_BUS
448 /* unregister ac97 codec */
449 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
451 if (codec->ac97->dev.bus)
452 device_unregister(&codec->ac97->dev);
456 /* stop no dev release warning */
457 static void soc_ac97_device_release(struct device *dev){}
459 /* register ac97 codec to bus */
460 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
464 codec->ac97->dev.bus = &ac97_bus_type;
465 codec->ac97->dev.parent = codec->card->dev;
466 codec->ac97->dev.release = soc_ac97_device_release;
468 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
469 codec->card->snd_card->number, 0, codec->name);
470 err = device_register(&codec->ac97->dev);
472 snd_printk(KERN_ERR "Can't register ac97 bus\n");
473 codec->ac97->dev.bus = NULL;
480 #ifdef CONFIG_PM_SLEEP
481 /* powers down audio subsystem for suspend */
482 int snd_soc_suspend(struct device *dev)
484 struct snd_soc_card *card = dev_get_drvdata(dev);
485 struct snd_soc_codec *codec;
488 /* If the initialization of this soc device failed, there is no codec
489 * associated with it. Just bail out in this case.
491 if (list_empty(&card->codec_dev_list))
494 /* Due to the resume being scheduled into a workqueue we could
495 * suspend before that's finished - wait for it to complete.
497 snd_power_lock(card->snd_card);
498 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
499 snd_power_unlock(card->snd_card);
501 /* we're going to block userspace touching us until resume completes */
502 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
504 /* mute any active DACs */
505 for (i = 0; i < card->num_rtd; i++) {
506 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
507 struct snd_soc_dai_driver *drv = dai->driver;
509 if (card->rtd[i].dai_link->ignore_suspend)
512 if (drv->ops->digital_mute && dai->playback_active)
513 drv->ops->digital_mute(dai, 1);
516 /* suspend all pcms */
517 for (i = 0; i < card->num_rtd; i++) {
518 if (card->rtd[i].dai_link->ignore_suspend)
521 snd_pcm_suspend_all(card->rtd[i].pcm);
524 if (card->suspend_pre)
525 card->suspend_pre(card);
527 for (i = 0; i < card->num_rtd; i++) {
528 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
529 struct snd_soc_platform *platform = card->rtd[i].platform;
531 if (card->rtd[i].dai_link->ignore_suspend)
534 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
535 cpu_dai->driver->suspend(cpu_dai);
536 if (platform->driver->suspend && !platform->suspended) {
537 platform->driver->suspend(cpu_dai);
538 platform->suspended = 1;
542 /* close any waiting streams and save state */
543 for (i = 0; i < card->num_rtd; i++) {
544 flush_delayed_work_sync(&card->rtd[i].delayed_work);
545 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
548 for (i = 0; i < card->num_rtd; i++) {
549 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
551 if (card->rtd[i].dai_link->ignore_suspend)
554 if (driver->playback.stream_name != NULL)
555 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
556 SND_SOC_DAPM_STREAM_SUSPEND);
558 if (driver->capture.stream_name != NULL)
559 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
560 SND_SOC_DAPM_STREAM_SUSPEND);
563 /* suspend all CODECs */
564 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
565 /* If there are paths active then the CODEC will be held with
566 * bias _ON and should not be suspended. */
567 if (!codec->suspended && codec->driver->suspend) {
568 switch (codec->dapm.bias_level) {
569 case SND_SOC_BIAS_STANDBY:
570 case SND_SOC_BIAS_OFF:
571 codec->driver->suspend(codec);
572 codec->suspended = 1;
573 codec->cache_sync = 1;
576 dev_dbg(codec->dev, "CODEC is on over suspend\n");
582 for (i = 0; i < card->num_rtd; i++) {
583 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
585 if (card->rtd[i].dai_link->ignore_suspend)
588 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
589 cpu_dai->driver->suspend(cpu_dai);
592 if (card->suspend_post)
593 card->suspend_post(card);
597 EXPORT_SYMBOL_GPL(snd_soc_suspend);
599 /* deferred resume work, so resume can complete before we finished
600 * setting our codec back up, which can be very slow on I2C
602 static void soc_resume_deferred(struct work_struct *work)
604 struct snd_soc_card *card =
605 container_of(work, struct snd_soc_card, deferred_resume_work);
606 struct snd_soc_codec *codec;
609 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
610 * so userspace apps are blocked from touching us
613 dev_dbg(card->dev, "starting resume work\n");
615 /* Bring us up into D2 so that DAPM starts enabling things */
616 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
618 if (card->resume_pre)
619 card->resume_pre(card);
621 /* resume AC97 DAIs */
622 for (i = 0; i < card->num_rtd; i++) {
623 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
625 if (card->rtd[i].dai_link->ignore_suspend)
628 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
629 cpu_dai->driver->resume(cpu_dai);
632 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
633 /* If the CODEC was idle over suspend then it will have been
634 * left with bias OFF or STANDBY and suspended so we must now
635 * resume. Otherwise the suspend was suppressed.
637 if (codec->driver->resume && codec->suspended) {
638 switch (codec->dapm.bias_level) {
639 case SND_SOC_BIAS_STANDBY:
640 case SND_SOC_BIAS_OFF:
641 codec->driver->resume(codec);
642 codec->suspended = 0;
645 dev_dbg(codec->dev, "CODEC was on over suspend\n");
651 for (i = 0; i < card->num_rtd; i++) {
652 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
654 if (card->rtd[i].dai_link->ignore_suspend)
657 if (driver->playback.stream_name != NULL)
658 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
659 SND_SOC_DAPM_STREAM_RESUME);
661 if (driver->capture.stream_name != NULL)
662 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
663 SND_SOC_DAPM_STREAM_RESUME);
666 /* unmute any active DACs */
667 for (i = 0; i < card->num_rtd; i++) {
668 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
669 struct snd_soc_dai_driver *drv = dai->driver;
671 if (card->rtd[i].dai_link->ignore_suspend)
674 if (drv->ops->digital_mute && dai->playback_active)
675 drv->ops->digital_mute(dai, 0);
678 for (i = 0; i < card->num_rtd; i++) {
679 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
680 struct snd_soc_platform *platform = card->rtd[i].platform;
682 if (card->rtd[i].dai_link->ignore_suspend)
685 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
686 cpu_dai->driver->resume(cpu_dai);
687 if (platform->driver->resume && platform->suspended) {
688 platform->driver->resume(cpu_dai);
689 platform->suspended = 0;
693 if (card->resume_post)
694 card->resume_post(card);
696 dev_dbg(card->dev, "resume work completed\n");
698 /* userspace can access us now we are back as we were before */
699 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
702 /* powers up audio subsystem after a suspend */
703 int snd_soc_resume(struct device *dev)
705 struct snd_soc_card *card = dev_get_drvdata(dev);
706 int i, ac97_control = 0;
708 /* If the initialization of this soc device failed, there is no codec
709 * associated with it. Just bail out in this case.
711 if (list_empty(&card->codec_dev_list))
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 const 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 (dai_link->cpu_dai_of_node) {
763 if (cpu_dai->dev->of_node != dai_link->cpu_dai_of_node)
766 if (strcmp(cpu_dai->name, dai_link->cpu_dai_name))
770 rtd->cpu_dai = cpu_dai;
773 dev_dbg(card->dev, "CPU DAI %s not registered\n",
774 dai_link->cpu_dai_name);
777 /* do we already have the CODEC for this link ? */
782 /* no, then find CODEC from registered CODECs*/
783 list_for_each_entry(codec, &codec_list, list) {
784 if (dai_link->codec_of_node) {
785 if (codec->dev->of_node != dai_link->codec_of_node)
788 if (strcmp(codec->name, dai_link->codec_name))
795 * CODEC found, so find CODEC DAI from registered DAIs from
798 list_for_each_entry(codec_dai, &dai_list, list) {
799 if (codec->dev == codec_dai->dev &&
800 !strcmp(codec_dai->name,
801 dai_link->codec_dai_name)) {
803 rtd->codec_dai = codec_dai;
807 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
808 dai_link->codec_dai_name);
812 dev_dbg(card->dev, "CODEC %s not registered\n",
813 dai_link->codec_name);
816 /* do we need a platform? */
820 /* if there's no platform we match on the empty platform */
821 platform_name = dai_link->platform_name;
822 if (!platform_name && !dai_link->platform_of_node)
823 platform_name = "snd-soc-dummy";
825 /* no, then find one from the set of registered platforms */
826 list_for_each_entry(platform, &platform_list, list) {
827 if (dai_link->platform_of_node) {
828 if (platform->dev->of_node !=
829 dai_link->platform_of_node)
832 if (strcmp(platform->name, platform_name))
836 rtd->platform = platform;
840 dev_dbg(card->dev, "platform %s not registered\n",
841 dai_link->platform_name);
845 /* mark rtd as complete if we found all 4 of our client devices */
846 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
853 static void soc_remove_codec(struct snd_soc_codec *codec)
857 if (codec->driver->remove) {
858 err = codec->driver->remove(codec);
861 "asoc: failed to remove %s: %d\n",
865 /* Make sure all DAPM widgets are freed */
866 snd_soc_dapm_free(&codec->dapm);
868 soc_cleanup_codec_debugfs(codec);
870 list_del(&codec->card_list);
871 module_put(codec->dev->driver->owner);
874 static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
876 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
877 struct snd_soc_codec *codec = rtd->codec;
878 struct snd_soc_platform *platform = rtd->platform;
879 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
882 /* unregister the rtd device */
883 if (rtd->dev_registered) {
884 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
885 device_remove_file(rtd->dev, &dev_attr_codec_reg);
886 device_unregister(rtd->dev);
887 rtd->dev_registered = 0;
890 /* remove the CODEC DAI */
891 if (codec_dai && codec_dai->probed &&
892 codec_dai->driver->remove_order == order) {
893 if (codec_dai->driver->remove) {
894 err = codec_dai->driver->remove(codec_dai);
896 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
898 codec_dai->probed = 0;
899 list_del(&codec_dai->card_list);
902 /* remove the platform */
903 if (platform && platform->probed &&
904 platform->driver->remove_order == order) {
905 if (platform->driver->remove) {
906 err = platform->driver->remove(platform);
908 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
911 /* Make sure all DAPM widgets are freed */
912 snd_soc_dapm_free(&platform->dapm);
914 platform->probed = 0;
915 list_del(&platform->card_list);
916 module_put(platform->dev->driver->owner);
919 /* remove the CODEC */
920 if (codec && codec->probed &&
921 codec->driver->remove_order == order)
922 soc_remove_codec(codec);
924 /* remove the cpu_dai */
925 if (cpu_dai && cpu_dai->probed &&
926 cpu_dai->driver->remove_order == order) {
927 if (cpu_dai->driver->remove) {
928 err = cpu_dai->driver->remove(cpu_dai);
930 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
933 list_del(&cpu_dai->card_list);
934 module_put(cpu_dai->dev->driver->owner);
938 static void soc_remove_dai_links(struct snd_soc_card *card)
942 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
944 for (dai = 0; dai < card->num_rtd; dai++)
945 soc_remove_dai_link(card, dai, order);
950 static void soc_set_name_prefix(struct snd_soc_card *card,
951 struct snd_soc_codec *codec)
955 if (card->codec_conf == NULL)
958 for (i = 0; i < card->num_configs; i++) {
959 struct snd_soc_codec_conf *map = &card->codec_conf[i];
960 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
961 codec->name_prefix = map->name_prefix;
967 static int soc_probe_codec(struct snd_soc_card *card,
968 struct snd_soc_codec *codec)
971 const struct snd_soc_codec_driver *driver = codec->driver;
974 codec->dapm.card = card;
975 soc_set_name_prefix(card, codec);
977 if (!try_module_get(codec->dev->driver->owner))
980 soc_init_codec_debugfs(codec);
982 if (driver->dapm_widgets)
983 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
984 driver->num_dapm_widgets);
986 codec->dapm.idle_bias_off = driver->idle_bias_off;
989 ret = driver->probe(codec);
992 "asoc: failed to probe CODEC %s: %d\n",
998 if (driver->controls)
999 snd_soc_add_controls(codec, driver->controls,
1000 driver->num_controls);
1001 if (driver->dapm_routes)
1002 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1003 driver->num_dapm_routes);
1005 /* mark codec as probed and add to card codec list */
1007 list_add(&codec->card_list, &card->codec_dev_list);
1008 list_add(&codec->dapm.list, &card->dapm_list);
1013 soc_cleanup_codec_debugfs(codec);
1014 module_put(codec->dev->driver->owner);
1019 static int soc_probe_platform(struct snd_soc_card *card,
1020 struct snd_soc_platform *platform)
1023 const struct snd_soc_platform_driver *driver = platform->driver;
1025 platform->card = card;
1026 platform->dapm.card = card;
1028 if (!try_module_get(platform->dev->driver->owner))
1031 if (driver->dapm_widgets)
1032 snd_soc_dapm_new_controls(&platform->dapm,
1033 driver->dapm_widgets, driver->num_dapm_widgets);
1035 if (driver->probe) {
1036 ret = driver->probe(platform);
1038 dev_err(platform->dev,
1039 "asoc: failed to probe platform %s: %d\n",
1040 platform->name, ret);
1045 if (driver->controls)
1046 snd_soc_add_platform_controls(platform, driver->controls,
1047 driver->num_controls);
1048 if (driver->dapm_routes)
1049 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1050 driver->num_dapm_routes);
1052 /* mark platform as probed and add to card platform list */
1053 platform->probed = 1;
1054 list_add(&platform->card_list, &card->platform_dev_list);
1055 list_add(&platform->dapm.list, &card->dapm_list);
1060 module_put(platform->dev->driver->owner);
1065 static void rtd_release(struct device *dev)
1070 static int soc_post_component_init(struct snd_soc_card *card,
1071 struct snd_soc_codec *codec,
1072 int num, int dailess)
1074 struct snd_soc_dai_link *dai_link = NULL;
1075 struct snd_soc_aux_dev *aux_dev = NULL;
1076 struct snd_soc_pcm_runtime *rtd;
1077 const char *temp, *name;
1081 dai_link = &card->dai_link[num];
1082 rtd = &card->rtd[num];
1083 name = dai_link->name;
1085 aux_dev = &card->aux_dev[num];
1086 rtd = &card->rtd_aux[num];
1087 name = aux_dev->name;
1091 /* Make sure all DAPM widgets are instantiated */
1092 snd_soc_dapm_new_widgets(&codec->dapm);
1094 /* machine controls, routes and widgets are not prefixed */
1095 temp = codec->name_prefix;
1096 codec->name_prefix = NULL;
1098 /* do machine specific initialization */
1099 if (!dailess && dai_link->init)
1100 ret = dai_link->init(rtd);
1101 else if (dailess && aux_dev->init)
1102 ret = aux_dev->init(&codec->dapm);
1104 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1107 codec->name_prefix = temp;
1109 /* register the rtd device */
1112 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1115 device_initialize(rtd->dev);
1116 rtd->dev->parent = card->dev;
1117 rtd->dev->release = rtd_release;
1118 rtd->dev->init_name = name;
1119 dev_set_drvdata(rtd->dev, rtd);
1120 mutex_init(&rtd->pcm_mutex);
1121 ret = device_add(rtd->dev);
1124 "asoc: failed to register runtime device: %d\n", ret);
1127 rtd->dev_registered = 1;
1129 /* add DAPM sysfs entries for this codec */
1130 ret = snd_soc_dapm_sys_add(rtd->dev);
1133 "asoc: failed to add codec dapm sysfs entries: %d\n",
1136 /* add codec sysfs entries */
1137 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1140 "asoc: failed to add codec sysfs files: %d\n", ret);
1145 static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order)
1147 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1148 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1149 struct snd_soc_codec *codec = rtd->codec;
1150 struct snd_soc_platform *platform = rtd->platform;
1151 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1154 dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1155 card->name, num, order);
1157 /* config components */
1158 codec_dai->codec = codec;
1159 cpu_dai->platform = platform;
1160 codec_dai->card = card;
1161 cpu_dai->card = card;
1163 /* set default power off timeout */
1164 rtd->pmdown_time = pmdown_time;
1166 /* probe the cpu_dai */
1167 if (!cpu_dai->probed &&
1168 cpu_dai->driver->probe_order == order) {
1169 if (!try_module_get(cpu_dai->dev->driver->owner))
1172 if (cpu_dai->driver->probe) {
1173 ret = cpu_dai->driver->probe(cpu_dai);
1175 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1177 module_put(cpu_dai->dev->driver->owner);
1181 cpu_dai->probed = 1;
1182 /* mark cpu_dai as probed and add to card dai list */
1183 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1186 /* probe the CODEC */
1187 if (!codec->probed &&
1188 codec->driver->probe_order == order) {
1189 ret = soc_probe_codec(card, codec);
1194 /* probe the platform */
1195 if (!platform->probed &&
1196 platform->driver->probe_order == order) {
1197 ret = soc_probe_platform(card, platform);
1202 /* probe the CODEC DAI */
1203 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1204 if (codec_dai->driver->probe) {
1205 ret = codec_dai->driver->probe(codec_dai);
1207 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1213 /* mark codec_dai as probed and add to card dai list */
1214 codec_dai->probed = 1;
1215 list_add(&codec_dai->card_list, &card->dai_dev_list);
1218 /* complete DAI probe during last probe */
1219 if (order != SND_SOC_COMP_ORDER_LAST)
1222 ret = soc_post_component_init(card, codec, num, 0);
1226 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1228 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1230 /* create the pcm */
1231 ret = soc_new_pcm(rtd, num);
1233 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1237 /* add platform data for AC97 devices */
1238 if (rtd->codec_dai->driver->ac97_control)
1239 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1244 #ifdef CONFIG_SND_SOC_AC97_BUS
1245 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1249 /* Only instantiate AC97 if not already done by the adaptor
1250 * for the generic AC97 subsystem.
1252 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1254 * It is possible that the AC97 device is already registered to
1255 * the device subsystem. This happens when the device is created
1256 * via snd_ac97_mixer(). Currently only SoC codec that does so
1257 * is the generic AC97 glue but others migh emerge.
1259 * In those cases we don't try to register the device again.
1261 if (!rtd->codec->ac97_created)
1264 ret = soc_ac97_dev_register(rtd->codec);
1266 printk(KERN_ERR "asoc: AC97 device register failed\n");
1270 rtd->codec->ac97_registered = 1;
1275 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1277 if (codec->ac97_registered) {
1278 soc_ac97_dev_unregister(codec);
1279 codec->ac97_registered = 0;
1284 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1286 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1287 struct snd_soc_codec *codec;
1290 /* find CODEC from registered CODECs*/
1291 list_for_each_entry(codec, &codec_list, list) {
1292 if (!strcmp(codec->name, aux_dev->codec_name)) {
1293 if (codec->probed) {
1295 "asoc: codec already probed");
1302 /* codec not found */
1303 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1307 ret = soc_probe_codec(card, codec);
1311 ret = soc_post_component_init(card, codec, num, 1);
1317 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1319 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1320 struct snd_soc_codec *codec = rtd->codec;
1322 /* unregister the rtd device */
1323 if (rtd->dev_registered) {
1324 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1325 device_del(rtd->dev);
1326 rtd->dev_registered = 0;
1329 if (codec && codec->probed)
1330 soc_remove_codec(codec);
1333 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1334 enum snd_soc_compress_type compress_type)
1338 if (codec->cache_init)
1341 /* override the compress_type if necessary */
1342 if (compress_type && codec->compress_type != compress_type)
1343 codec->compress_type = compress_type;
1344 ret = snd_soc_cache_init(codec);
1346 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1350 codec->cache_init = 1;
1354 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1356 struct snd_soc_codec *codec;
1357 struct snd_soc_codec_conf *codec_conf;
1358 enum snd_soc_compress_type compress_type;
1359 struct snd_soc_dai_link *dai_link;
1362 mutex_lock(&card->mutex);
1364 if (card->instantiated) {
1365 mutex_unlock(&card->mutex);
1370 for (i = 0; i < card->num_links; i++)
1371 soc_bind_dai_link(card, i);
1373 /* bind completed ? */
1374 if (card->num_rtd != card->num_links) {
1375 mutex_unlock(&card->mutex);
1379 /* initialize the register cache for each available codec */
1380 list_for_each_entry(codec, &codec_list, list) {
1381 if (codec->cache_init)
1383 /* by default we don't override the compress_type */
1385 /* check to see if we need to override the compress_type */
1386 for (i = 0; i < card->num_configs; ++i) {
1387 codec_conf = &card->codec_conf[i];
1388 if (!strcmp(codec->name, codec_conf->dev_name)) {
1389 compress_type = codec_conf->compress_type;
1390 if (compress_type && compress_type
1391 != codec->compress_type)
1395 ret = snd_soc_init_codec_cache(codec, compress_type);
1397 mutex_unlock(&card->mutex);
1402 /* card bind complete so register a sound card */
1403 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1404 card->owner, 0, &card->snd_card);
1406 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1408 mutex_unlock(&card->mutex);
1411 card->snd_card->dev = card->dev;
1413 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1414 card->dapm.dev = card->dev;
1415 card->dapm.card = card;
1416 list_add(&card->dapm.list, &card->dapm_list);
1418 #ifdef CONFIG_DEBUG_FS
1419 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1422 #ifdef CONFIG_PM_SLEEP
1423 /* deferred resume work */
1424 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1427 if (card->dapm_widgets)
1428 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1429 card->num_dapm_widgets);
1431 /* initialise the sound card only once */
1433 ret = card->probe(card);
1435 goto card_probe_error;
1438 /* early DAI link probe */
1439 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1441 for (i = 0; i < card->num_links; i++) {
1442 ret = soc_probe_dai_link(card, i, order);
1444 pr_err("asoc: failed to instantiate card %s: %d\n",
1451 for (i = 0; i < card->num_aux_devs; i++) {
1452 ret = soc_probe_aux_dev(card, i);
1454 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1456 goto probe_aux_dev_err;
1460 /* We should have a non-codec control add function but we don't */
1462 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1463 struct snd_soc_codec,
1466 card->num_controls);
1468 if (card->dapm_routes)
1469 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1470 card->num_dapm_routes);
1472 snd_soc_dapm_new_widgets(&card->dapm);
1474 for (i = 0; i < card->num_links; i++) {
1475 dai_link = &card->dai_link[i];
1477 if (dai_link->dai_fmt) {
1478 ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1481 dev_warn(card->rtd[i].codec_dai->dev,
1482 "Failed to set DAI format: %d\n",
1485 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1488 dev_warn(card->rtd[i].cpu_dai->dev,
1489 "Failed to set DAI format: %d\n",
1494 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1496 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1497 "%s", card->long_name ? card->long_name : card->name);
1498 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1499 "%s", card->driver_name ? card->driver_name : card->name);
1500 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1501 switch (card->snd_card->driver[i]) {
1507 if (!isalnum(card->snd_card->driver[i]))
1508 card->snd_card->driver[i] = '_';
1513 if (card->late_probe) {
1514 ret = card->late_probe(card);
1516 dev_err(card->dev, "%s late_probe() failed: %d\n",
1518 goto probe_aux_dev_err;
1522 snd_soc_dapm_new_widgets(&card->dapm);
1524 if (card->fully_routed)
1525 list_for_each_entry(codec, &card->codec_dev_list, card_list)
1526 snd_soc_dapm_auto_nc_codec_pins(codec);
1528 ret = snd_card_register(card->snd_card);
1530 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1531 goto probe_aux_dev_err;
1534 #ifdef CONFIG_SND_SOC_AC97_BUS
1535 /* register any AC97 codecs */
1536 for (i = 0; i < card->num_rtd; i++) {
1537 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1539 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1541 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1542 goto probe_aux_dev_err;
1547 card->instantiated = 1;
1548 snd_soc_dapm_sync(&card->dapm);
1549 mutex_unlock(&card->mutex);
1553 for (i = 0; i < card->num_aux_devs; i++)
1554 soc_remove_aux_dev(card, i);
1557 soc_remove_dai_links(card);
1563 snd_card_free(card->snd_card);
1565 mutex_unlock(&card->mutex);
1569 * Attempt to initialise any uninitialised cards. Must be called with
1572 static void snd_soc_instantiate_cards(void)
1574 struct snd_soc_card *card;
1575 list_for_each_entry(card, &card_list, list)
1576 snd_soc_instantiate_card(card);
1579 /* probes a new socdev */
1580 static int soc_probe(struct platform_device *pdev)
1582 struct snd_soc_card *card = platform_get_drvdata(pdev);
1586 * no card, so machine driver should be registering card
1587 * we should not be here in that case so ret error
1592 /* Bodge while we unpick instantiation */
1593 card->dev = &pdev->dev;
1595 ret = snd_soc_register_card(card);
1597 dev_err(&pdev->dev, "Failed to register card\n");
1604 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1608 /* make sure any delayed work runs */
1609 for (i = 0; i < card->num_rtd; i++) {
1610 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1611 flush_delayed_work_sync(&rtd->delayed_work);
1614 /* remove auxiliary devices */
1615 for (i = 0; i < card->num_aux_devs; i++)
1616 soc_remove_aux_dev(card, i);
1618 /* remove and free each DAI */
1619 soc_remove_dai_links(card);
1621 soc_cleanup_card_debugfs(card);
1623 /* remove the card */
1627 snd_soc_dapm_free(&card->dapm);
1630 snd_card_free(card->snd_card);
1635 /* removes a socdev */
1636 static int soc_remove(struct platform_device *pdev)
1638 struct snd_soc_card *card = platform_get_drvdata(pdev);
1640 snd_soc_unregister_card(card);
1644 int snd_soc_poweroff(struct device *dev)
1646 struct snd_soc_card *card = dev_get_drvdata(dev);
1649 if (!card->instantiated)
1652 /* Flush out pmdown_time work - we actually do want to run it
1653 * now, we're shutting down so no imminent restart. */
1654 for (i = 0; i < card->num_rtd; i++) {
1655 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1656 flush_delayed_work_sync(&rtd->delayed_work);
1659 snd_soc_dapm_shutdown(card);
1663 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1665 const struct dev_pm_ops snd_soc_pm_ops = {
1666 .suspend = snd_soc_suspend,
1667 .resume = snd_soc_resume,
1668 .poweroff = snd_soc_poweroff,
1670 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1672 /* ASoC platform driver */
1673 static struct platform_driver soc_driver = {
1675 .name = "soc-audio",
1676 .owner = THIS_MODULE,
1677 .pm = &snd_soc_pm_ops,
1680 .remove = soc_remove,
1684 * snd_soc_codec_volatile_register: Report if a register is volatile.
1686 * @codec: CODEC to query.
1687 * @reg: Register to query.
1689 * Boolean function indiciating if a CODEC register is volatile.
1691 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1694 if (codec->volatile_register)
1695 return codec->volatile_register(codec, reg);
1699 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1702 * snd_soc_codec_readable_register: Report if a register is readable.
1704 * @codec: CODEC to query.
1705 * @reg: Register to query.
1707 * Boolean function indicating if a CODEC register is readable.
1709 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1712 if (codec->readable_register)
1713 return codec->readable_register(codec, reg);
1717 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1720 * snd_soc_codec_writable_register: Report if a register is writable.
1722 * @codec: CODEC to query.
1723 * @reg: Register to query.
1725 * Boolean function indicating if a CODEC register is writable.
1727 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1730 if (codec->writable_register)
1731 return codec->writable_register(codec, reg);
1735 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1737 int snd_soc_platform_read(struct snd_soc_platform *platform,
1742 if (!platform->driver->read) {
1743 dev_err(platform->dev, "platform has no read back\n");
1747 ret = platform->driver->read(platform, reg);
1748 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
1749 trace_snd_soc_preg_read(platform, reg, ret);
1753 EXPORT_SYMBOL_GPL(snd_soc_platform_read);
1755 int snd_soc_platform_write(struct snd_soc_platform *platform,
1756 unsigned int reg, unsigned int val)
1758 if (!platform->driver->write) {
1759 dev_err(platform->dev, "platform has no write back\n");
1763 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
1764 trace_snd_soc_preg_write(platform, reg, val);
1765 return platform->driver->write(platform, reg, val);
1767 EXPORT_SYMBOL_GPL(snd_soc_platform_write);
1770 * snd_soc_new_ac97_codec - initailise AC97 device
1771 * @codec: audio codec
1772 * @ops: AC97 bus operations
1773 * @num: AC97 codec number
1775 * Initialises AC97 codec resources for use by ad-hoc devices only.
1777 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1778 struct snd_ac97_bus_ops *ops, int num)
1780 mutex_lock(&codec->mutex);
1782 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1783 if (codec->ac97 == NULL) {
1784 mutex_unlock(&codec->mutex);
1788 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1789 if (codec->ac97->bus == NULL) {
1792 mutex_unlock(&codec->mutex);
1796 codec->ac97->bus->ops = ops;
1797 codec->ac97->num = num;
1800 * Mark the AC97 device to be created by us. This way we ensure that the
1801 * device will be registered with the device subsystem later on.
1803 codec->ac97_created = 1;
1805 mutex_unlock(&codec->mutex);
1808 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1811 * snd_soc_free_ac97_codec - free AC97 codec device
1812 * @codec: audio codec
1814 * Frees AC97 codec device resources.
1816 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1818 mutex_lock(&codec->mutex);
1819 #ifdef CONFIG_SND_SOC_AC97_BUS
1820 soc_unregister_ac97_dai_link(codec);
1822 kfree(codec->ac97->bus);
1825 codec->ac97_created = 0;
1826 mutex_unlock(&codec->mutex);
1828 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1830 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
1834 ret = codec->read(codec, reg);
1835 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1836 trace_snd_soc_reg_read(codec, reg, ret);
1840 EXPORT_SYMBOL_GPL(snd_soc_read);
1842 unsigned int snd_soc_write(struct snd_soc_codec *codec,
1843 unsigned int reg, unsigned int val)
1845 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
1846 trace_snd_soc_reg_write(codec, reg, val);
1847 return codec->write(codec, reg, val);
1849 EXPORT_SYMBOL_GPL(snd_soc_write);
1851 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
1852 unsigned int reg, const void *data, size_t len)
1854 return codec->bulk_write_raw(codec, reg, data, len);
1856 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
1859 * snd_soc_update_bits - update codec register bits
1860 * @codec: audio codec
1861 * @reg: codec register
1862 * @mask: register mask
1865 * Writes new register value.
1867 * Returns 1 for change, 0 for no change, or negative error code.
1869 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1870 unsigned int mask, unsigned int value)
1873 unsigned int old, new;
1876 ret = snd_soc_read(codec, reg);
1881 new = (old & ~mask) | (value & mask);
1882 change = old != new;
1884 ret = snd_soc_write(codec, reg, new);
1891 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1894 * snd_soc_update_bits_locked - update codec register bits
1895 * @codec: audio codec
1896 * @reg: codec register
1897 * @mask: register mask
1900 * Writes new register value, and takes the codec mutex.
1902 * Returns 1 for change else 0.
1904 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1905 unsigned short reg, unsigned int mask,
1910 mutex_lock(&codec->mutex);
1911 change = snd_soc_update_bits(codec, reg, mask, value);
1912 mutex_unlock(&codec->mutex);
1916 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1919 * snd_soc_test_bits - test register for change
1920 * @codec: audio codec
1921 * @reg: codec register
1922 * @mask: register mask
1925 * Tests a register with a new value and checks if the new value is
1926 * different from the old value.
1928 * Returns 1 for change else 0.
1930 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1931 unsigned int mask, unsigned int value)
1934 unsigned int old, new;
1936 old = snd_soc_read(codec, reg);
1937 new = (old & ~mask) | value;
1938 change = old != new;
1942 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1945 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1946 * @substream: the pcm substream
1947 * @hw: the hardware parameters
1949 * Sets the substream runtime hardware parameters.
1951 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1952 const struct snd_pcm_hardware *hw)
1954 struct snd_pcm_runtime *runtime = substream->runtime;
1955 runtime->hw.info = hw->info;
1956 runtime->hw.formats = hw->formats;
1957 runtime->hw.period_bytes_min = hw->period_bytes_min;
1958 runtime->hw.period_bytes_max = hw->period_bytes_max;
1959 runtime->hw.periods_min = hw->periods_min;
1960 runtime->hw.periods_max = hw->periods_max;
1961 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1962 runtime->hw.fifo_size = hw->fifo_size;
1965 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1968 * snd_soc_cnew - create new control
1969 * @_template: control template
1970 * @data: control private data
1971 * @long_name: control long name
1972 * @prefix: control name prefix
1974 * Create a new mixer control from a template control.
1976 * Returns 0 for success, else error.
1978 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1979 void *data, char *long_name,
1982 struct snd_kcontrol_new template;
1983 struct snd_kcontrol *kcontrol;
1987 memcpy(&template, _template, sizeof(template));
1991 long_name = template.name;
1994 name_len = strlen(long_name) + strlen(prefix) + 2;
1995 name = kmalloc(name_len, GFP_KERNEL);
1999 snprintf(name, name_len, "%s %s", prefix, long_name);
2001 template.name = name;
2003 template.name = long_name;
2006 kcontrol = snd_ctl_new1(&template, data);
2012 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2015 * snd_soc_add_controls - add an array of controls to a codec.
2016 * Convienience function to add a list of controls. Many codecs were
2017 * duplicating this code.
2019 * @codec: codec to add controls to
2020 * @controls: array of controls to add
2021 * @num_controls: number of elements in the array
2023 * Return 0 for success, else error.
2025 int snd_soc_add_controls(struct snd_soc_codec *codec,
2026 const struct snd_kcontrol_new *controls, int num_controls)
2028 struct snd_card *card = codec->card->snd_card;
2031 for (i = 0; i < num_controls; i++) {
2032 const struct snd_kcontrol_new *control = &controls[i];
2033 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2035 codec->name_prefix));
2037 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2038 codec->name, control->name, err);
2045 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2048 * snd_soc_add_platform_controls - add an array of controls to a platform.
2049 * Convienience function to add a list of controls.
2051 * @platform: platform to add controls to
2052 * @controls: array of controls to add
2053 * @num_controls: number of elements in the array
2055 * Return 0 for success, else error.
2057 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2058 const struct snd_kcontrol_new *controls, int num_controls)
2060 struct snd_card *card = platform->card->snd_card;
2063 for (i = 0; i < num_controls; i++) {
2064 const struct snd_kcontrol_new *control = &controls[i];
2065 err = snd_ctl_add(card, snd_soc_cnew(control, platform,
2066 control->name, NULL));
2068 dev_err(platform->dev, "Failed to add %s %d\n",control->name, err);
2075 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2078 * snd_soc_info_enum_double - enumerated double mixer info callback
2079 * @kcontrol: mixer control
2080 * @uinfo: control element information
2082 * Callback to provide information about a double enumerated
2085 * Returns 0 for success.
2087 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2088 struct snd_ctl_elem_info *uinfo)
2090 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2092 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2093 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2094 uinfo->value.enumerated.items = e->max;
2096 if (uinfo->value.enumerated.item > e->max - 1)
2097 uinfo->value.enumerated.item = e->max - 1;
2098 strcpy(uinfo->value.enumerated.name,
2099 e->texts[uinfo->value.enumerated.item]);
2102 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2105 * snd_soc_get_enum_double - enumerated double mixer get callback
2106 * @kcontrol: mixer control
2107 * @ucontrol: control element information
2109 * Callback to get the value of a double enumerated mixer.
2111 * Returns 0 for success.
2113 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2114 struct snd_ctl_elem_value *ucontrol)
2116 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2117 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2118 unsigned int val, bitmask;
2120 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2122 val = snd_soc_read(codec, e->reg);
2123 ucontrol->value.enumerated.item[0]
2124 = (val >> e->shift_l) & (bitmask - 1);
2125 if (e->shift_l != e->shift_r)
2126 ucontrol->value.enumerated.item[1] =
2127 (val >> e->shift_r) & (bitmask - 1);
2131 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2134 * snd_soc_put_enum_double - enumerated double mixer put callback
2135 * @kcontrol: mixer control
2136 * @ucontrol: control element information
2138 * Callback to set the value of a double enumerated mixer.
2140 * Returns 0 for success.
2142 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2143 struct snd_ctl_elem_value *ucontrol)
2145 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2146 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2148 unsigned int mask, bitmask;
2150 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2152 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2154 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2155 mask = (bitmask - 1) << e->shift_l;
2156 if (e->shift_l != e->shift_r) {
2157 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2159 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2160 mask |= (bitmask - 1) << e->shift_r;
2163 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2165 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2168 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2169 * @kcontrol: mixer control
2170 * @ucontrol: control element information
2172 * Callback to get the value of a double semi enumerated mixer.
2174 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2175 * used for handling bitfield coded enumeration for example.
2177 * Returns 0 for success.
2179 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2180 struct snd_ctl_elem_value *ucontrol)
2182 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2183 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2184 unsigned int reg_val, val, mux;
2186 reg_val = snd_soc_read(codec, e->reg);
2187 val = (reg_val >> e->shift_l) & e->mask;
2188 for (mux = 0; mux < e->max; mux++) {
2189 if (val == e->values[mux])
2192 ucontrol->value.enumerated.item[0] = mux;
2193 if (e->shift_l != e->shift_r) {
2194 val = (reg_val >> e->shift_r) & e->mask;
2195 for (mux = 0; mux < e->max; mux++) {
2196 if (val == e->values[mux])
2199 ucontrol->value.enumerated.item[1] = mux;
2204 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2207 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2208 * @kcontrol: mixer control
2209 * @ucontrol: control element information
2211 * Callback to set the value of a double semi enumerated mixer.
2213 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2214 * used for handling bitfield coded enumeration for example.
2216 * Returns 0 for success.
2218 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2219 struct snd_ctl_elem_value *ucontrol)
2221 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2222 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2226 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2228 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2229 mask = e->mask << e->shift_l;
2230 if (e->shift_l != e->shift_r) {
2231 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2233 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2234 mask |= e->mask << e->shift_r;
2237 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2239 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2242 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2243 * @kcontrol: mixer control
2244 * @uinfo: control element information
2246 * Callback to provide information about an external enumerated
2249 * Returns 0 for success.
2251 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2252 struct snd_ctl_elem_info *uinfo)
2254 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2256 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2258 uinfo->value.enumerated.items = e->max;
2260 if (uinfo->value.enumerated.item > e->max - 1)
2261 uinfo->value.enumerated.item = e->max - 1;
2262 strcpy(uinfo->value.enumerated.name,
2263 e->texts[uinfo->value.enumerated.item]);
2266 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2269 * snd_soc_info_volsw_ext - external single mixer info callback
2270 * @kcontrol: mixer control
2271 * @uinfo: control element information
2273 * Callback to provide information about a single external mixer control.
2275 * Returns 0 for success.
2277 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2278 struct snd_ctl_elem_info *uinfo)
2280 int max = kcontrol->private_value;
2282 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2283 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2285 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2288 uinfo->value.integer.min = 0;
2289 uinfo->value.integer.max = max;
2292 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2295 * snd_soc_info_volsw - single mixer info callback
2296 * @kcontrol: mixer control
2297 * @uinfo: control element information
2299 * Callback to provide information about a single mixer control, or a double
2300 * mixer control that spans 2 registers.
2302 * Returns 0 for success.
2304 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2305 struct snd_ctl_elem_info *uinfo)
2307 struct soc_mixer_control *mc =
2308 (struct soc_mixer_control *)kcontrol->private_value;
2311 if (!mc->platform_max)
2312 mc->platform_max = mc->max;
2313 platform_max = mc->platform_max;
2315 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2316 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2318 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2320 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2321 uinfo->value.integer.min = 0;
2322 uinfo->value.integer.max = platform_max;
2325 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2328 * snd_soc_get_volsw - single mixer get callback
2329 * @kcontrol: mixer control
2330 * @ucontrol: control element information
2332 * Callback to get the value of a single mixer control, or a double mixer
2333 * control that spans 2 registers.
2335 * Returns 0 for success.
2337 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2338 struct snd_ctl_elem_value *ucontrol)
2340 struct soc_mixer_control *mc =
2341 (struct soc_mixer_control *)kcontrol->private_value;
2342 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2343 unsigned int reg = mc->reg;
2344 unsigned int reg2 = mc->rreg;
2345 unsigned int shift = mc->shift;
2346 unsigned int rshift = mc->rshift;
2348 unsigned int mask = (1 << fls(max)) - 1;
2349 unsigned int invert = mc->invert;
2351 ucontrol->value.integer.value[0] =
2352 (snd_soc_read(codec, reg) >> shift) & mask;
2354 ucontrol->value.integer.value[0] =
2355 max - ucontrol->value.integer.value[0];
2357 if (snd_soc_volsw_is_stereo(mc)) {
2359 ucontrol->value.integer.value[1] =
2360 (snd_soc_read(codec, reg) >> rshift) & mask;
2362 ucontrol->value.integer.value[1] =
2363 (snd_soc_read(codec, reg2) >> shift) & mask;
2365 ucontrol->value.integer.value[1] =
2366 max - ucontrol->value.integer.value[1];
2371 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2374 * snd_soc_put_volsw - single mixer put callback
2375 * @kcontrol: mixer control
2376 * @ucontrol: control element information
2378 * Callback to set the value of a single mixer control, or a double mixer
2379 * control that spans 2 registers.
2381 * Returns 0 for success.
2383 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2384 struct snd_ctl_elem_value *ucontrol)
2386 struct soc_mixer_control *mc =
2387 (struct soc_mixer_control *)kcontrol->private_value;
2388 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2389 unsigned int reg = mc->reg;
2390 unsigned int reg2 = mc->rreg;
2391 unsigned int shift = mc->shift;
2392 unsigned int rshift = mc->rshift;
2394 unsigned int mask = (1 << fls(max)) - 1;
2395 unsigned int invert = mc->invert;
2398 unsigned int val2 = 0;
2399 unsigned int val, val_mask;
2401 val = (ucontrol->value.integer.value[0] & mask);
2404 val_mask = mask << shift;
2406 if (snd_soc_volsw_is_stereo(mc)) {
2407 val2 = (ucontrol->value.integer.value[1] & mask);
2411 val_mask |= mask << rshift;
2412 val |= val2 << rshift;
2414 val2 = val2 << shift;
2418 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2423 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2427 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2430 * snd_soc_info_volsw_s8 - signed mixer info callback
2431 * @kcontrol: mixer control
2432 * @uinfo: control element information
2434 * Callback to provide information about a signed mixer control.
2436 * Returns 0 for success.
2438 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2439 struct snd_ctl_elem_info *uinfo)
2441 struct soc_mixer_control *mc =
2442 (struct soc_mixer_control *)kcontrol->private_value;
2446 if (!mc->platform_max)
2447 mc->platform_max = mc->max;
2448 platform_max = mc->platform_max;
2450 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2452 uinfo->value.integer.min = 0;
2453 uinfo->value.integer.max = platform_max - min;
2456 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2459 * snd_soc_get_volsw_s8 - signed mixer get callback
2460 * @kcontrol: mixer control
2461 * @ucontrol: control element information
2463 * Callback to get the value of a signed mixer control.
2465 * Returns 0 for success.
2467 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2468 struct snd_ctl_elem_value *ucontrol)
2470 struct soc_mixer_control *mc =
2471 (struct soc_mixer_control *)kcontrol->private_value;
2472 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2473 unsigned int reg = mc->reg;
2475 int val = snd_soc_read(codec, reg);
2477 ucontrol->value.integer.value[0] =
2478 ((signed char)(val & 0xff))-min;
2479 ucontrol->value.integer.value[1] =
2480 ((signed char)((val >> 8) & 0xff))-min;
2483 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2486 * snd_soc_put_volsw_sgn - signed mixer put callback
2487 * @kcontrol: mixer control
2488 * @ucontrol: control element information
2490 * Callback to set the value of a signed mixer control.
2492 * Returns 0 for success.
2494 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2495 struct snd_ctl_elem_value *ucontrol)
2497 struct soc_mixer_control *mc =
2498 (struct soc_mixer_control *)kcontrol->private_value;
2499 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2500 unsigned int reg = mc->reg;
2504 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2505 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2507 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2509 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2512 * snd_soc_limit_volume - Set new limit to an existing volume control.
2514 * @codec: where to look for the control
2515 * @name: Name of the control
2516 * @max: new maximum limit
2518 * Return 0 for success, else error.
2520 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2521 const char *name, int max)
2523 struct snd_card *card = codec->card->snd_card;
2524 struct snd_kcontrol *kctl;
2525 struct soc_mixer_control *mc;
2529 /* Sanity check for name and max */
2530 if (unlikely(!name || max <= 0))
2533 list_for_each_entry(kctl, &card->controls, list) {
2534 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2540 mc = (struct soc_mixer_control *)kctl->private_value;
2541 if (max <= mc->max) {
2542 mc->platform_max = max;
2548 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2551 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2552 * mixer info callback
2553 * @kcontrol: mixer control
2554 * @uinfo: control element information
2556 * Returns 0 for success.
2558 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2559 struct snd_ctl_elem_info *uinfo)
2561 struct soc_mixer_control *mc =
2562 (struct soc_mixer_control *)kcontrol->private_value;
2566 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2568 uinfo->value.integer.min = 0;
2569 uinfo->value.integer.max = max-min;
2573 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2576 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2577 * mixer get callback
2578 * @kcontrol: mixer control
2579 * @uinfo: control element information
2581 * Returns 0 for success.
2583 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2584 struct snd_ctl_elem_value *ucontrol)
2586 struct soc_mixer_control *mc =
2587 (struct soc_mixer_control *)kcontrol->private_value;
2588 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2589 unsigned int mask = (1<<mc->shift)-1;
2591 int val = snd_soc_read(codec, mc->reg) & mask;
2592 int valr = snd_soc_read(codec, mc->rreg) & mask;
2594 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2595 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2598 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2601 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2602 * mixer put callback
2603 * @kcontrol: mixer control
2604 * @uinfo: control element information
2606 * Returns 0 for success.
2608 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2609 struct snd_ctl_elem_value *ucontrol)
2611 struct soc_mixer_control *mc =
2612 (struct soc_mixer_control *)kcontrol->private_value;
2613 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2614 unsigned int mask = (1<<mc->shift)-1;
2617 unsigned int val, valr, oval, ovalr;
2619 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2621 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2624 oval = snd_soc_read(codec, mc->reg) & mask;
2625 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2629 ret = snd_soc_write(codec, mc->reg, val);
2633 if (ovalr != valr) {
2634 ret = snd_soc_write(codec, mc->rreg, valr);
2641 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2644 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2646 * @clk_id: DAI specific clock ID
2647 * @freq: new clock frequency in Hz
2648 * @dir: new clock direction - input/output.
2650 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2652 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2653 unsigned int freq, int dir)
2655 if (dai->driver && dai->driver->ops->set_sysclk)
2656 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2657 else if (dai->codec && dai->codec->driver->set_sysclk)
2658 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2663 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2666 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2668 * @clk_id: DAI specific clock ID
2669 * @source: Source for the clock
2670 * @freq: new clock frequency in Hz
2671 * @dir: new clock direction - input/output.
2673 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2675 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2676 int source, unsigned int freq, int dir)
2678 if (codec->driver->set_sysclk)
2679 return codec->driver->set_sysclk(codec, clk_id, source,
2684 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2687 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2689 * @div_id: DAI specific clock divider ID
2690 * @div: new clock divisor.
2692 * Configures the clock dividers. This is used to derive the best DAI bit and
2693 * frame clocks from the system or master clock. It's best to set the DAI bit
2694 * and frame clocks as low as possible to save system power.
2696 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2697 int div_id, int div)
2699 if (dai->driver && dai->driver->ops->set_clkdiv)
2700 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2704 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2707 * snd_soc_dai_set_pll - configure DAI PLL.
2709 * @pll_id: DAI specific PLL ID
2710 * @source: DAI specific source for the PLL
2711 * @freq_in: PLL input clock frequency in Hz
2712 * @freq_out: requested PLL output clock frequency in Hz
2714 * Configures and enables PLL to generate output clock based on input clock.
2716 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2717 unsigned int freq_in, unsigned int freq_out)
2719 if (dai->driver && dai->driver->ops->set_pll)
2720 return dai->driver->ops->set_pll(dai, pll_id, source,
2722 else if (dai->codec && dai->codec->driver->set_pll)
2723 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2728 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2731 * snd_soc_codec_set_pll - configure codec PLL.
2733 * @pll_id: DAI specific PLL ID
2734 * @source: DAI specific source for the PLL
2735 * @freq_in: PLL input clock frequency in Hz
2736 * @freq_out: requested PLL output clock frequency in Hz
2738 * Configures and enables PLL to generate output clock based on input clock.
2740 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2741 unsigned int freq_in, unsigned int freq_out)
2743 if (codec->driver->set_pll)
2744 return codec->driver->set_pll(codec, pll_id, source,
2749 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2752 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2754 * @fmt: SND_SOC_DAIFMT_ format value.
2756 * Configures the DAI hardware format and clocking.
2758 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2760 if (dai->driver && dai->driver->ops->set_fmt)
2761 return dai->driver->ops->set_fmt(dai, fmt);
2765 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2768 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2770 * @tx_mask: bitmask representing active TX slots.
2771 * @rx_mask: bitmask representing active RX slots.
2772 * @slots: Number of slots in use.
2773 * @slot_width: Width in bits for each slot.
2775 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2778 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2779 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2781 if (dai->driver && dai->driver->ops->set_tdm_slot)
2782 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2787 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2790 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2792 * @tx_num: how many TX channels
2793 * @tx_slot: pointer to an array which imply the TX slot number channel
2795 * @rx_num: how many RX channels
2796 * @rx_slot: pointer to an array which imply the RX slot number channel
2799 * configure the relationship between channel number and TDM slot number.
2801 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2802 unsigned int tx_num, unsigned int *tx_slot,
2803 unsigned int rx_num, unsigned int *rx_slot)
2805 if (dai->driver && dai->driver->ops->set_channel_map)
2806 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2811 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2814 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2816 * @tristate: tristate enable
2818 * Tristates the DAI so that others can use it.
2820 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2822 if (dai->driver && dai->driver->ops->set_tristate)
2823 return dai->driver->ops->set_tristate(dai, tristate);
2827 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2830 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2832 * @mute: mute enable
2834 * Mutes the DAI DAC.
2836 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2838 if (dai->driver && dai->driver->ops->digital_mute)
2839 return dai->driver->ops->digital_mute(dai, mute);
2843 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2846 * snd_soc_register_card - Register a card with the ASoC core
2848 * @card: Card to register
2851 int snd_soc_register_card(struct snd_soc_card *card)
2855 if (!card->name || !card->dev)
2858 for (i = 0; i < card->num_links; i++) {
2859 struct snd_soc_dai_link *link = &card->dai_link[i];
2862 * Codec must be specified by 1 of name or OF node,
2863 * not both or neither.
2865 if (!!link->codec_name == !!link->codec_of_node) {
2867 "Neither/both codec name/of_node are set\n");
2872 * Platform may be specified by either name or OF node, but
2873 * can be left unspecified, and a dummy platform will be used.
2875 if (link->platform_name && link->platform_of_node) {
2877 "Both platform name/of_node are set\n");
2882 * CPU DAI must be specified by 1 of name or OF node,
2883 * not both or neither.
2885 if (!!link->cpu_dai_name == !!link->cpu_dai_of_node) {
2887 "Neither/both cpu_dai name/of_node are set\n");
2892 dev_set_drvdata(card->dev, card);
2894 snd_soc_initialize_card_lists(card);
2896 soc_init_card_debugfs(card);
2898 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
2899 (card->num_links + card->num_aux_devs),
2901 if (card->rtd == NULL)
2903 card->rtd_aux = &card->rtd[card->num_links];
2905 for (i = 0; i < card->num_links; i++)
2906 card->rtd[i].dai_link = &card->dai_link[i];
2908 INIT_LIST_HEAD(&card->list);
2909 INIT_LIST_HEAD(&card->dapm_dirty);
2910 card->instantiated = 0;
2911 mutex_init(&card->mutex);
2913 mutex_lock(&client_mutex);
2914 list_add(&card->list, &card_list);
2915 snd_soc_instantiate_cards();
2916 mutex_unlock(&client_mutex);
2918 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2922 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2925 * snd_soc_unregister_card - Unregister a card with the ASoC core
2927 * @card: Card to unregister
2930 int snd_soc_unregister_card(struct snd_soc_card *card)
2932 if (card->instantiated)
2933 soc_cleanup_card_resources(card);
2934 mutex_lock(&client_mutex);
2935 list_del(&card->list);
2936 mutex_unlock(&client_mutex);
2937 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2941 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2944 * Simplify DAI link configuration by removing ".-1" from device names
2945 * and sanitizing names.
2947 static char *fmt_single_name(struct device *dev, int *id)
2949 char *found, name[NAME_SIZE];
2952 if (dev_name(dev) == NULL)
2955 strlcpy(name, dev_name(dev), NAME_SIZE);
2957 /* are we a "%s.%d" name (platform and SPI components) */
2958 found = strstr(name, dev->driver->name);
2961 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2963 /* discard ID from name if ID == -1 */
2965 found[strlen(dev->driver->name)] = '\0';
2969 /* I2C component devices are named "bus-addr" */
2970 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2971 char tmp[NAME_SIZE];
2973 /* create unique ID number from I2C addr and bus */
2974 *id = ((id1 & 0xffff) << 16) + id2;
2976 /* sanitize component name for DAI link creation */
2977 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2978 strlcpy(name, tmp, NAME_SIZE);
2983 return kstrdup(name, GFP_KERNEL);
2987 * Simplify DAI link naming for single devices with multiple DAIs by removing
2988 * any ".-1" and using the DAI name (instead of device name).
2990 static inline char *fmt_multiple_name(struct device *dev,
2991 struct snd_soc_dai_driver *dai_drv)
2993 if (dai_drv->name == NULL) {
2994 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
2999 return kstrdup(dai_drv->name, GFP_KERNEL);
3003 * snd_soc_register_dai - Register a DAI with the ASoC core
3005 * @dai: DAI to register
3007 int snd_soc_register_dai(struct device *dev,
3008 struct snd_soc_dai_driver *dai_drv)
3010 struct snd_soc_dai *dai;
3012 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3014 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3018 /* create DAI component name */
3019 dai->name = fmt_single_name(dev, &dai->id);
3020 if (dai->name == NULL) {
3026 dai->driver = dai_drv;
3027 if (!dai->driver->ops)
3028 dai->driver->ops = &null_dai_ops;
3030 mutex_lock(&client_mutex);
3031 list_add(&dai->list, &dai_list);
3032 snd_soc_instantiate_cards();
3033 mutex_unlock(&client_mutex);
3035 pr_debug("Registered DAI '%s'\n", dai->name);
3039 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3042 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3044 * @dai: DAI to unregister
3046 void snd_soc_unregister_dai(struct device *dev)
3048 struct snd_soc_dai *dai;
3050 list_for_each_entry(dai, &dai_list, list) {
3051 if (dev == dai->dev)
3057 mutex_lock(&client_mutex);
3058 list_del(&dai->list);
3059 mutex_unlock(&client_mutex);
3061 pr_debug("Unregistered DAI '%s'\n", dai->name);
3065 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3068 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3070 * @dai: Array of DAIs to register
3071 * @count: Number of DAIs
3073 int snd_soc_register_dais(struct device *dev,
3074 struct snd_soc_dai_driver *dai_drv, size_t count)
3076 struct snd_soc_dai *dai;
3079 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3081 for (i = 0; i < count; i++) {
3083 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3089 /* create DAI component name */
3090 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3091 if (dai->name == NULL) {
3098 dai->driver = &dai_drv[i];
3099 if (dai->driver->id)
3100 dai->id = dai->driver->id;
3103 if (!dai->driver->ops)
3104 dai->driver->ops = &null_dai_ops;
3106 mutex_lock(&client_mutex);
3107 list_add(&dai->list, &dai_list);
3108 mutex_unlock(&client_mutex);
3110 pr_debug("Registered DAI '%s'\n", dai->name);
3113 mutex_lock(&client_mutex);
3114 snd_soc_instantiate_cards();
3115 mutex_unlock(&client_mutex);
3119 for (i--; i >= 0; i--)
3120 snd_soc_unregister_dai(dev);
3124 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3127 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3129 * @dai: Array of DAIs to unregister
3130 * @count: Number of DAIs
3132 void snd_soc_unregister_dais(struct device *dev, size_t count)
3136 for (i = 0; i < count; i++)
3137 snd_soc_unregister_dai(dev);
3139 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3142 * snd_soc_register_platform - Register a platform with the ASoC core
3144 * @platform: platform to register
3146 int snd_soc_register_platform(struct device *dev,
3147 struct snd_soc_platform_driver *platform_drv)
3149 struct snd_soc_platform *platform;
3151 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3153 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3154 if (platform == NULL)
3157 /* create platform component name */
3158 platform->name = fmt_single_name(dev, &platform->id);
3159 if (platform->name == NULL) {
3164 platform->dev = dev;
3165 platform->driver = platform_drv;
3166 platform->dapm.dev = dev;
3167 platform->dapm.platform = platform;
3168 platform->dapm.stream_event = platform_drv->stream_event;
3170 mutex_lock(&client_mutex);
3171 list_add(&platform->list, &platform_list);
3172 snd_soc_instantiate_cards();
3173 mutex_unlock(&client_mutex);
3175 pr_debug("Registered platform '%s'\n", platform->name);
3179 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3182 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3184 * @platform: platform to unregister
3186 void snd_soc_unregister_platform(struct device *dev)
3188 struct snd_soc_platform *platform;
3190 list_for_each_entry(platform, &platform_list, list) {
3191 if (dev == platform->dev)
3197 mutex_lock(&client_mutex);
3198 list_del(&platform->list);
3199 mutex_unlock(&client_mutex);
3201 pr_debug("Unregistered platform '%s'\n", platform->name);
3202 kfree(platform->name);
3205 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3207 static u64 codec_format_map[] = {
3208 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3209 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3210 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3211 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3212 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3213 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3214 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3215 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3216 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3217 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3218 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3219 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3220 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3221 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3222 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3223 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3226 /* Fix up the DAI formats for endianness: codecs don't actually see
3227 * the endianness of the data but we're using the CPU format
3228 * definitions which do need to include endianness so we ensure that
3229 * codec DAIs always have both big and little endian variants set.
3231 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3235 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3236 if (stream->formats & codec_format_map[i])
3237 stream->formats |= codec_format_map[i];
3241 * snd_soc_register_codec - Register a codec with the ASoC core
3243 * @codec: codec to register
3245 int snd_soc_register_codec(struct device *dev,
3246 const struct snd_soc_codec_driver *codec_drv,
3247 struct snd_soc_dai_driver *dai_drv,
3251 struct snd_soc_codec *codec;
3254 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3256 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3260 /* create CODEC component name */
3261 codec->name = fmt_single_name(dev, &codec->id);
3262 if (codec->name == NULL) {
3267 if (codec_drv->compress_type)
3268 codec->compress_type = codec_drv->compress_type;
3270 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3272 codec->write = codec_drv->write;
3273 codec->read = codec_drv->read;
3274 codec->volatile_register = codec_drv->volatile_register;
3275 codec->readable_register = codec_drv->readable_register;
3276 codec->writable_register = codec_drv->writable_register;
3277 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3278 codec->dapm.dev = dev;
3279 codec->dapm.codec = codec;
3280 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3281 codec->dapm.stream_event = codec_drv->stream_event;
3283 codec->driver = codec_drv;
3284 codec->num_dai = num_dai;
3285 mutex_init(&codec->mutex);
3287 /* allocate CODEC register cache */
3288 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3289 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3290 codec->reg_size = reg_size;
3291 /* it is necessary to make a copy of the default register cache
3292 * because in the case of using a compression type that requires
3293 * the default register cache to be marked as __devinitconst the
3294 * kernel might have freed the array by the time we initialize
3297 if (codec_drv->reg_cache_default) {
3298 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3299 reg_size, GFP_KERNEL);
3300 if (!codec->reg_def_copy) {
3307 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3308 if (!codec->volatile_register)
3309 codec->volatile_register = snd_soc_default_volatile_register;
3310 if (!codec->readable_register)
3311 codec->readable_register = snd_soc_default_readable_register;
3312 if (!codec->writable_register)
3313 codec->writable_register = snd_soc_default_writable_register;
3316 for (i = 0; i < num_dai; i++) {
3317 fixup_codec_formats(&dai_drv[i].playback);
3318 fixup_codec_formats(&dai_drv[i].capture);
3321 /* register any DAIs */
3323 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3328 mutex_lock(&client_mutex);
3329 list_add(&codec->list, &codec_list);
3330 snd_soc_instantiate_cards();
3331 mutex_unlock(&client_mutex);
3333 pr_debug("Registered codec '%s'\n", codec->name);
3337 kfree(codec->reg_def_copy);
3338 codec->reg_def_copy = NULL;
3343 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3346 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3348 * @codec: codec to unregister
3350 void snd_soc_unregister_codec(struct device *dev)
3352 struct snd_soc_codec *codec;
3355 list_for_each_entry(codec, &codec_list, list) {
3356 if (dev == codec->dev)
3363 for (i = 0; i < codec->num_dai; i++)
3364 snd_soc_unregister_dai(dev);
3366 mutex_lock(&client_mutex);
3367 list_del(&codec->list);
3368 mutex_unlock(&client_mutex);
3370 pr_debug("Unregistered codec '%s'\n", codec->name);
3372 snd_soc_cache_exit(codec);
3373 kfree(codec->reg_def_copy);
3377 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3379 /* Retrieve a card's name from device tree */
3380 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3381 const char *propname)
3383 struct device_node *np = card->dev->of_node;
3386 ret = of_property_read_string_index(np, propname, 0, &card->name);
3388 * EINVAL means the property does not exist. This is fine providing
3389 * card->name was previously set, which is checked later in
3390 * snd_soc_register_card.
3392 if (ret < 0 && ret != -EINVAL) {
3394 "Property '%s' could not be read: %d\n",
3401 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3403 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3404 const char *propname)
3406 struct device_node *np = card->dev->of_node;
3408 struct snd_soc_dapm_route *routes;
3411 num_routes = of_property_count_strings(np, propname);
3412 if (num_routes & 1) {
3414 "Property '%s's length is not even\n",
3421 "Property '%s's length is zero\n",
3426 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3430 "Could not allocate DAPM route table\n");
3434 for (i = 0; i < num_routes; i++) {
3435 ret = of_property_read_string_index(np, propname,
3436 2 * i, &routes[i].sink);
3439 "Property '%s' index %d could not be read: %d\n",
3440 propname, 2 * i, ret);
3443 ret = of_property_read_string_index(np, propname,
3444 (2 * i) + 1, &routes[i].source);
3447 "Property '%s' index %d could not be read: %d\n",
3448 propname, (2 * i) + 1, ret);
3453 card->num_dapm_routes = num_routes;
3454 card->dapm_routes = routes;
3458 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3460 static int __init snd_soc_init(void)
3462 #ifdef CONFIG_DEBUG_FS
3463 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3464 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3466 "ASoC: Failed to create debugfs directory\n");
3467 snd_soc_debugfs_root = NULL;
3470 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3472 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3474 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3476 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3478 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3479 &platform_list_fops))
3480 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3483 snd_soc_util_init();
3485 return platform_driver_register(&soc_driver);
3487 module_init(snd_soc_init);
3489 static void __exit snd_soc_exit(void)
3491 snd_soc_util_exit();
3493 #ifdef CONFIG_DEBUG_FS
3494 debugfs_remove_recursive(snd_soc_debugfs_root);
3496 platform_driver_unregister(&soc_driver);
3498 module_exit(snd_soc_exit);
3500 /* Module information */
3501 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3502 MODULE_DESCRIPTION("ALSA SoC Core");
3503 MODULE_LICENSE("GPL");
3504 MODULE_ALIAS("platform:soc-audio");