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 DEFINE_MUTEX(pcm_mutex);
48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(card_list);
57 static LIST_HEAD(dai_list);
58 static LIST_HEAD(platform_list);
59 static LIST_HEAD(codec_list);
61 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
68 static int pmdown_time = 5000;
69 module_param(pmdown_time, int, 0);
70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
72 /* returns the minimum number of bytes needed to represent
73 * a particular given value */
74 static int min_bytes_needed(unsigned long val)
79 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
82 c = (sizeof val * 8) - c;
90 /* fill buf which is 'len' bytes with a formatted
91 * string of the form 'reg: value\n' */
92 static int format_register_str(struct snd_soc_codec *codec,
93 unsigned int reg, char *buf, size_t len)
95 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96 int regsize = codec->driver->reg_word_size * 2;
99 char regbuf[regsize + 1];
101 /* since tmpbuf is allocated on the stack, warn the callers if they
102 * try to abuse this function */
105 /* +2 for ': ' and + 1 for '\n' */
106 if (wordsize + regsize + 2 + 1 != len)
109 ret = snd_soc_read(codec , reg);
111 memset(regbuf, 'X', regsize);
112 regbuf[regsize] = '\0';
114 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
117 /* prepare the buffer */
118 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119 /* copy it back to the caller without the '\0' */
120 memcpy(buf, tmpbuf, len);
125 /* codec register dump */
126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127 size_t count, loff_t pos)
130 int wordsize, regsize;
135 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136 regsize = codec->driver->reg_word_size * 2;
138 len = wordsize + regsize + 2 + 1;
140 if (!codec->driver->reg_cache_size)
143 if (codec->driver->reg_cache_step)
144 step = codec->driver->reg_cache_step;
146 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147 if (codec->readable_register && !codec->readable_register(codec, i))
149 if (codec->driver->display_register) {
150 count += codec->driver->display_register(codec, buf + count,
151 PAGE_SIZE - count, i);
153 /* only support larger than PAGE_SIZE bytes debugfs
154 * entries for the default case */
156 if (total + len >= count - 1)
158 format_register_str(codec, i, buf + total, len);
165 total = min(total, count - 1);
170 static ssize_t codec_reg_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
173 struct snd_soc_pcm_runtime *rtd =
174 container_of(dev, struct snd_soc_pcm_runtime, dev);
176 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
179 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
181 static ssize_t pmdown_time_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
184 struct snd_soc_pcm_runtime *rtd =
185 container_of(dev, struct snd_soc_pcm_runtime, dev);
187 return sprintf(buf, "%ld\n", rtd->pmdown_time);
190 static ssize_t pmdown_time_set(struct device *dev,
191 struct device_attribute *attr,
192 const char *buf, size_t count)
194 struct snd_soc_pcm_runtime *rtd =
195 container_of(dev, struct snd_soc_pcm_runtime, dev);
198 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
207 #ifdef CONFIG_DEBUG_FS
208 static int codec_reg_open_file(struct inode *inode, struct file *file)
210 file->private_data = inode->i_private;
214 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215 size_t count, loff_t *ppos)
218 struct snd_soc_codec *codec = file->private_data;
221 if (*ppos < 0 || !count)
224 buf = kmalloc(count, GFP_KERNEL);
228 ret = soc_codec_reg_show(codec, buf, count, *ppos);
230 if (copy_to_user(user_buf, buf, ret)) {
241 static ssize_t codec_reg_write_file(struct file *file,
242 const char __user *user_buf, size_t count, loff_t *ppos)
247 unsigned long reg, value;
249 struct snd_soc_codec *codec = file->private_data;
251 buf_size = min(count, (sizeof(buf)-1));
252 if (copy_from_user(buf, user_buf, buf_size))
256 if (codec->driver->reg_cache_step)
257 step = codec->driver->reg_cache_step;
259 while (*start == ' ')
261 reg = simple_strtoul(start, &start, 16);
262 while (*start == ' ')
264 if (strict_strtoul(start, 16, &value))
267 /* Userspace has been fiddling around behind the kernel's back */
268 add_taint(TAINT_USER);
270 snd_soc_write(codec, reg, value);
274 static const struct file_operations codec_reg_fops = {
275 .open = codec_reg_open_file,
276 .read = codec_reg_read_file,
277 .write = codec_reg_write_file,
278 .llseek = default_llseek,
281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
283 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
285 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
287 if (!codec->debugfs_codec_root) {
289 "ASoC: Failed to create codec debugfs directory\n");
293 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
295 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
298 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299 codec->debugfs_codec_root,
300 codec, &codec_reg_fops);
301 if (!codec->debugfs_reg)
303 "ASoC: Failed to create codec register debugfs file\n");
305 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
308 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
310 debugfs_remove_recursive(codec->debugfs_codec_root);
313 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
314 size_t count, loff_t *ppos)
316 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
317 ssize_t len, ret = 0;
318 struct snd_soc_codec *codec;
323 list_for_each_entry(codec, &codec_list, list) {
324 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
328 if (ret > PAGE_SIZE) {
335 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
342 static const struct file_operations codec_list_fops = {
343 .read = codec_list_read_file,
344 .llseek = default_llseek,/* read accesses f_pos */
347 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
348 size_t count, loff_t *ppos)
350 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
351 ssize_t len, ret = 0;
352 struct snd_soc_dai *dai;
357 list_for_each_entry(dai, &dai_list, list) {
358 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
361 if (ret > PAGE_SIZE) {
367 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
374 static const struct file_operations dai_list_fops = {
375 .read = dai_list_read_file,
376 .llseek = default_llseek,/* read accesses f_pos */
379 static ssize_t platform_list_read_file(struct file *file,
380 char __user *user_buf,
381 size_t count, loff_t *ppos)
383 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
384 ssize_t len, ret = 0;
385 struct snd_soc_platform *platform;
390 list_for_each_entry(platform, &platform_list, list) {
391 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
395 if (ret > PAGE_SIZE) {
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
408 static const struct file_operations platform_list_fops = {
409 .read = platform_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
413 static void soc_init_card_debugfs(struct snd_soc_card *card)
415 card->debugfs_card_root = debugfs_create_dir(card->name,
416 snd_soc_debugfs_root);
417 if (!card->debugfs_card_root) {
419 "ASoC: Failed to create codec debugfs directory\n");
423 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
424 card->debugfs_card_root,
426 if (!card->debugfs_pop_time)
428 "Failed to create pop time debugfs file\n");
431 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
433 debugfs_remove_recursive(card->debugfs_card_root);
438 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
442 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
446 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
450 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
455 #ifdef CONFIG_SND_SOC_AC97_BUS
456 /* unregister ac97 codec */
457 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
459 if (codec->ac97->dev.bus)
460 device_unregister(&codec->ac97->dev);
464 /* stop no dev release warning */
465 static void soc_ac97_device_release(struct device *dev){}
467 /* register ac97 codec to bus */
468 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
472 codec->ac97->dev.bus = &ac97_bus_type;
473 codec->ac97->dev.parent = codec->card->dev;
474 codec->ac97->dev.release = soc_ac97_device_release;
476 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
477 codec->card->snd_card->number, 0, codec->name);
478 err = device_register(&codec->ac97->dev);
480 snd_printk(KERN_ERR "Can't register ac97 bus\n");
481 codec->ac97->dev.bus = NULL;
488 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
490 struct snd_soc_pcm_runtime *rtd = substream->private_data;
491 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
492 struct snd_soc_dai *codec_dai = rtd->codec_dai;
495 if (!codec_dai->driver->symmetric_rates &&
496 !cpu_dai->driver->symmetric_rates &&
497 !rtd->dai_link->symmetric_rates)
500 /* This can happen if multiple streams are starting simultaneously -
501 * the second can need to get its constraints before the first has
502 * picked a rate. Complain and allow the application to carry on.
506 "Not enforcing symmetric_rates due to race\n");
510 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
512 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
513 SNDRV_PCM_HW_PARAM_RATE,
514 rtd->rate, rtd->rate);
517 "Unable to apply rate symmetry constraint: %d\n", ret);
525 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
526 * then initialized and any private data can be allocated. This also calls
527 * startup for the cpu DAI, platform, machine and codec DAI.
529 static int soc_pcm_open(struct snd_pcm_substream *substream)
531 struct snd_soc_pcm_runtime *rtd = substream->private_data;
532 struct snd_pcm_runtime *runtime = substream->runtime;
533 struct snd_soc_platform *platform = rtd->platform;
534 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
535 struct snd_soc_dai *codec_dai = rtd->codec_dai;
536 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
537 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
540 mutex_lock(&pcm_mutex);
542 /* startup the audio subsystem */
543 if (cpu_dai->driver->ops->startup) {
544 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
546 printk(KERN_ERR "asoc: can't open interface %s\n",
552 if (platform->driver->ops && platform->driver->ops->open) {
553 ret = platform->driver->ops->open(substream);
555 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
560 if (codec_dai->driver->ops->startup) {
561 ret = codec_dai->driver->ops->startup(substream, codec_dai);
563 printk(KERN_ERR "asoc: can't open codec %s\n",
569 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
570 ret = rtd->dai_link->ops->startup(substream);
572 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
577 /* Check that the codec and cpu DAIs are compatible */
578 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
579 runtime->hw.rate_min =
580 max(codec_dai_drv->playback.rate_min,
581 cpu_dai_drv->playback.rate_min);
582 runtime->hw.rate_max =
583 min(codec_dai_drv->playback.rate_max,
584 cpu_dai_drv->playback.rate_max);
585 runtime->hw.channels_min =
586 max(codec_dai_drv->playback.channels_min,
587 cpu_dai_drv->playback.channels_min);
588 runtime->hw.channels_max =
589 min(codec_dai_drv->playback.channels_max,
590 cpu_dai_drv->playback.channels_max);
591 runtime->hw.formats =
592 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
594 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
595 if (codec_dai_drv->playback.rates
596 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
597 runtime->hw.rates |= cpu_dai_drv->playback.rates;
598 if (cpu_dai_drv->playback.rates
599 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
600 runtime->hw.rates |= codec_dai_drv->playback.rates;
602 runtime->hw.rate_min =
603 max(codec_dai_drv->capture.rate_min,
604 cpu_dai_drv->capture.rate_min);
605 runtime->hw.rate_max =
606 min(codec_dai_drv->capture.rate_max,
607 cpu_dai_drv->capture.rate_max);
608 runtime->hw.channels_min =
609 max(codec_dai_drv->capture.channels_min,
610 cpu_dai_drv->capture.channels_min);
611 runtime->hw.channels_max =
612 min(codec_dai_drv->capture.channels_max,
613 cpu_dai_drv->capture.channels_max);
614 runtime->hw.formats =
615 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
617 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
618 if (codec_dai_drv->capture.rates
619 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
620 runtime->hw.rates |= cpu_dai_drv->capture.rates;
621 if (cpu_dai_drv->capture.rates
622 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
623 runtime->hw.rates |= codec_dai_drv->capture.rates;
627 snd_pcm_limit_hw_rates(runtime);
628 if (!runtime->hw.rates) {
629 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
630 codec_dai->name, cpu_dai->name);
633 if (!runtime->hw.formats) {
634 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
635 codec_dai->name, cpu_dai->name);
638 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
639 runtime->hw.channels_min > runtime->hw.channels_max) {
640 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
641 codec_dai->name, cpu_dai->name);
645 /* Symmetry only applies if we've already got an active stream. */
646 if (cpu_dai->active || codec_dai->active) {
647 ret = soc_pcm_apply_symmetry(substream);
652 pr_debug("asoc: %s <-> %s info:\n",
653 codec_dai->name, cpu_dai->name);
654 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
655 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
656 runtime->hw.channels_max);
657 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
658 runtime->hw.rate_max);
660 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
661 cpu_dai->playback_active++;
662 codec_dai->playback_active++;
664 cpu_dai->capture_active++;
665 codec_dai->capture_active++;
669 rtd->codec->active++;
670 mutex_unlock(&pcm_mutex);
674 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
675 rtd->dai_link->ops->shutdown(substream);
678 if (codec_dai->driver->ops->shutdown)
679 codec_dai->driver->ops->shutdown(substream, codec_dai);
682 if (platform->driver->ops && platform->driver->ops->close)
683 platform->driver->ops->close(substream);
686 if (cpu_dai->driver->ops->shutdown)
687 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
689 mutex_unlock(&pcm_mutex);
694 * Power down the audio subsystem pmdown_time msecs after close is called.
695 * This is to ensure there are no pops or clicks in between any music tracks
696 * due to DAPM power cycling.
698 static void close_delayed_work(struct work_struct *work)
700 struct snd_soc_pcm_runtime *rtd =
701 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
702 struct snd_soc_dai *codec_dai = rtd->codec_dai;
704 mutex_lock(&pcm_mutex);
706 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
707 codec_dai->driver->playback.stream_name,
708 codec_dai->playback_active ? "active" : "inactive",
709 codec_dai->pop_wait ? "yes" : "no");
711 /* are we waiting on this codec DAI stream */
712 if (codec_dai->pop_wait == 1) {
713 codec_dai->pop_wait = 0;
714 snd_soc_dapm_stream_event(rtd,
715 codec_dai->driver->playback.stream_name,
716 SND_SOC_DAPM_STREAM_STOP);
719 mutex_unlock(&pcm_mutex);
723 * Called by ALSA when a PCM substream is closed. Private data can be
724 * freed here. The cpu DAI, codec DAI, machine and platform are also
727 static int soc_codec_close(struct snd_pcm_substream *substream)
729 struct snd_soc_pcm_runtime *rtd = substream->private_data;
730 struct snd_soc_platform *platform = rtd->platform;
731 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
732 struct snd_soc_dai *codec_dai = rtd->codec_dai;
733 struct snd_soc_codec *codec = rtd->codec;
735 mutex_lock(&pcm_mutex);
737 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
738 cpu_dai->playback_active--;
739 codec_dai->playback_active--;
741 cpu_dai->capture_active--;
742 codec_dai->capture_active--;
749 /* Muting the DAC suppresses artifacts caused during digital
750 * shutdown, for example from stopping clocks.
752 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
753 snd_soc_dai_digital_mute(codec_dai, 1);
755 if (cpu_dai->driver->ops->shutdown)
756 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
758 if (codec_dai->driver->ops->shutdown)
759 codec_dai->driver->ops->shutdown(substream, codec_dai);
761 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
762 rtd->dai_link->ops->shutdown(substream);
764 if (platform->driver->ops && platform->driver->ops->close)
765 platform->driver->ops->close(substream);
766 cpu_dai->runtime = NULL;
768 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
769 /* start delayed pop wq here for playback streams */
770 codec_dai->pop_wait = 1;
771 schedule_delayed_work(&rtd->delayed_work,
772 msecs_to_jiffies(rtd->pmdown_time));
774 /* capture streams can be powered down now */
775 snd_soc_dapm_stream_event(rtd,
776 codec_dai->driver->capture.stream_name,
777 SND_SOC_DAPM_STREAM_STOP);
780 mutex_unlock(&pcm_mutex);
785 * Called by ALSA when the PCM substream is prepared, can set format, sample
786 * rate, etc. This function is non atomic and can be called multiple times,
787 * it can refer to the runtime info.
789 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
791 struct snd_soc_pcm_runtime *rtd = substream->private_data;
792 struct snd_soc_platform *platform = rtd->platform;
793 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
794 struct snd_soc_dai *codec_dai = rtd->codec_dai;
797 mutex_lock(&pcm_mutex);
799 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
800 ret = rtd->dai_link->ops->prepare(substream);
802 printk(KERN_ERR "asoc: machine prepare error\n");
807 if (platform->driver->ops && platform->driver->ops->prepare) {
808 ret = platform->driver->ops->prepare(substream);
810 printk(KERN_ERR "asoc: platform prepare error\n");
815 if (codec_dai->driver->ops->prepare) {
816 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
818 printk(KERN_ERR "asoc: codec DAI prepare error\n");
823 if (cpu_dai->driver->ops->prepare) {
824 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
826 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
831 /* cancel any delayed stream shutdown that is pending */
832 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
833 codec_dai->pop_wait) {
834 codec_dai->pop_wait = 0;
835 cancel_delayed_work(&rtd->delayed_work);
838 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
839 snd_soc_dapm_stream_event(rtd,
840 codec_dai->driver->playback.stream_name,
841 SND_SOC_DAPM_STREAM_START);
843 snd_soc_dapm_stream_event(rtd,
844 codec_dai->driver->capture.stream_name,
845 SND_SOC_DAPM_STREAM_START);
847 snd_soc_dai_digital_mute(codec_dai, 0);
850 mutex_unlock(&pcm_mutex);
855 * Called by ALSA when the hardware params are set by application. This
856 * function can also be called multiple times and can allocate buffers
857 * (using snd_pcm_lib_* ). It's non-atomic.
859 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
860 struct snd_pcm_hw_params *params)
862 struct snd_soc_pcm_runtime *rtd = substream->private_data;
863 struct snd_soc_platform *platform = rtd->platform;
864 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
865 struct snd_soc_dai *codec_dai = rtd->codec_dai;
868 mutex_lock(&pcm_mutex);
870 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
871 ret = rtd->dai_link->ops->hw_params(substream, params);
873 printk(KERN_ERR "asoc: machine hw_params failed\n");
878 if (codec_dai->driver->ops->hw_params) {
879 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
881 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
887 if (cpu_dai->driver->ops->hw_params) {
888 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
890 printk(KERN_ERR "asoc: interface %s hw params failed\n",
896 if (platform->driver->ops && platform->driver->ops->hw_params) {
897 ret = platform->driver->ops->hw_params(substream, params);
899 printk(KERN_ERR "asoc: platform %s hw params failed\n",
905 rtd->rate = params_rate(params);
908 mutex_unlock(&pcm_mutex);
912 if (cpu_dai->driver->ops->hw_free)
913 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
916 if (codec_dai->driver->ops->hw_free)
917 codec_dai->driver->ops->hw_free(substream, codec_dai);
920 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
921 rtd->dai_link->ops->hw_free(substream);
923 mutex_unlock(&pcm_mutex);
928 * Frees resources allocated by hw_params, can be called multiple times
930 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
932 struct snd_soc_pcm_runtime *rtd = substream->private_data;
933 struct snd_soc_platform *platform = rtd->platform;
934 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
935 struct snd_soc_dai *codec_dai = rtd->codec_dai;
936 struct snd_soc_codec *codec = rtd->codec;
938 mutex_lock(&pcm_mutex);
940 /* apply codec digital mute */
942 snd_soc_dai_digital_mute(codec_dai, 1);
944 /* free any machine hw params */
945 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
946 rtd->dai_link->ops->hw_free(substream);
948 /* free any DMA resources */
949 if (platform->driver->ops && platform->driver->ops->hw_free)
950 platform->driver->ops->hw_free(substream);
952 /* now free hw params for the DAIs */
953 if (codec_dai->driver->ops->hw_free)
954 codec_dai->driver->ops->hw_free(substream, codec_dai);
956 if (cpu_dai->driver->ops->hw_free)
957 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
959 mutex_unlock(&pcm_mutex);
963 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
965 struct snd_soc_pcm_runtime *rtd = substream->private_data;
966 struct snd_soc_platform *platform = rtd->platform;
967 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
968 struct snd_soc_dai *codec_dai = rtd->codec_dai;
971 if (codec_dai->driver->ops->trigger) {
972 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
977 if (platform->driver->ops && platform->driver->ops->trigger) {
978 ret = platform->driver->ops->trigger(substream, cmd);
983 if (cpu_dai->driver->ops->trigger) {
984 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
992 * soc level wrapper for pointer callback
993 * If cpu_dai, codec_dai, platform driver has the delay callback, than
994 * the runtime->delay will be updated accordingly.
996 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
998 struct snd_soc_pcm_runtime *rtd = substream->private_data;
999 struct snd_soc_platform *platform = rtd->platform;
1000 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1002 struct snd_pcm_runtime *runtime = substream->runtime;
1003 snd_pcm_uframes_t offset = 0;
1004 snd_pcm_sframes_t delay = 0;
1006 if (platform->driver->ops && platform->driver->ops->pointer)
1007 offset = platform->driver->ops->pointer(substream);
1009 if (cpu_dai->driver->ops->delay)
1010 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1012 if (codec_dai->driver->ops->delay)
1013 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1015 if (platform->driver->delay)
1016 delay += platform->driver->delay(substream, codec_dai);
1018 runtime->delay = delay;
1023 /* ASoC PCM operations */
1024 static struct snd_pcm_ops soc_pcm_ops = {
1025 .open = soc_pcm_open,
1026 .close = soc_codec_close,
1027 .hw_params = soc_pcm_hw_params,
1028 .hw_free = soc_pcm_hw_free,
1029 .prepare = soc_pcm_prepare,
1030 .trigger = soc_pcm_trigger,
1031 .pointer = soc_pcm_pointer,
1034 #ifdef CONFIG_PM_SLEEP
1035 /* powers down audio subsystem for suspend */
1036 int snd_soc_suspend(struct device *dev)
1038 struct snd_soc_card *card = dev_get_drvdata(dev);
1039 struct snd_soc_codec *codec;
1042 /* If the initialization of this soc device failed, there is no codec
1043 * associated with it. Just bail out in this case.
1045 if (list_empty(&card->codec_dev_list))
1048 /* Due to the resume being scheduled into a workqueue we could
1049 * suspend before that's finished - wait for it to complete.
1051 snd_power_lock(card->snd_card);
1052 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1053 snd_power_unlock(card->snd_card);
1055 /* we're going to block userspace touching us until resume completes */
1056 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1058 /* mute any active DACs */
1059 for (i = 0; i < card->num_rtd; i++) {
1060 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1061 struct snd_soc_dai_driver *drv = dai->driver;
1063 if (card->rtd[i].dai_link->ignore_suspend)
1066 if (drv->ops->digital_mute && dai->playback_active)
1067 drv->ops->digital_mute(dai, 1);
1070 /* suspend all pcms */
1071 for (i = 0; i < card->num_rtd; i++) {
1072 if (card->rtd[i].dai_link->ignore_suspend)
1075 snd_pcm_suspend_all(card->rtd[i].pcm);
1078 if (card->suspend_pre)
1079 card->suspend_pre(card);
1081 for (i = 0; i < card->num_rtd; i++) {
1082 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1083 struct snd_soc_platform *platform = card->rtd[i].platform;
1085 if (card->rtd[i].dai_link->ignore_suspend)
1088 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1089 cpu_dai->driver->suspend(cpu_dai);
1090 if (platform->driver->suspend && !platform->suspended) {
1091 platform->driver->suspend(cpu_dai);
1092 platform->suspended = 1;
1096 /* close any waiting streams and save state */
1097 for (i = 0; i < card->num_rtd; i++) {
1098 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1099 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1102 for (i = 0; i < card->num_rtd; i++) {
1103 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1105 if (card->rtd[i].dai_link->ignore_suspend)
1108 if (driver->playback.stream_name != NULL)
1109 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1110 SND_SOC_DAPM_STREAM_SUSPEND);
1112 if (driver->capture.stream_name != NULL)
1113 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1114 SND_SOC_DAPM_STREAM_SUSPEND);
1117 /* suspend all CODECs */
1118 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1119 /* If there are paths active then the CODEC will be held with
1120 * bias _ON and should not be suspended. */
1121 if (!codec->suspended && codec->driver->suspend) {
1122 switch (codec->dapm.bias_level) {
1123 case SND_SOC_BIAS_STANDBY:
1124 case SND_SOC_BIAS_OFF:
1125 codec->driver->suspend(codec, PMSG_SUSPEND);
1126 codec->suspended = 1;
1129 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1135 for (i = 0; i < card->num_rtd; i++) {
1136 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1138 if (card->rtd[i].dai_link->ignore_suspend)
1141 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1142 cpu_dai->driver->suspend(cpu_dai);
1145 if (card->suspend_post)
1146 card->suspend_post(card);
1150 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1152 /* deferred resume work, so resume can complete before we finished
1153 * setting our codec back up, which can be very slow on I2C
1155 static void soc_resume_deferred(struct work_struct *work)
1157 struct snd_soc_card *card =
1158 container_of(work, struct snd_soc_card, deferred_resume_work);
1159 struct snd_soc_codec *codec;
1162 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1163 * so userspace apps are blocked from touching us
1166 dev_dbg(card->dev, "starting resume work\n");
1168 /* Bring us up into D2 so that DAPM starts enabling things */
1169 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1171 if (card->resume_pre)
1172 card->resume_pre(card);
1174 /* resume AC97 DAIs */
1175 for (i = 0; i < card->num_rtd; i++) {
1176 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1178 if (card->rtd[i].dai_link->ignore_suspend)
1181 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1182 cpu_dai->driver->resume(cpu_dai);
1185 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1186 /* If the CODEC was idle over suspend then it will have been
1187 * left with bias OFF or STANDBY and suspended so we must now
1188 * resume. Otherwise the suspend was suppressed.
1190 if (codec->driver->resume && codec->suspended) {
1191 switch (codec->dapm.bias_level) {
1192 case SND_SOC_BIAS_STANDBY:
1193 case SND_SOC_BIAS_OFF:
1194 codec->driver->resume(codec);
1195 codec->suspended = 0;
1198 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1204 for (i = 0; i < card->num_rtd; i++) {
1205 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1207 if (card->rtd[i].dai_link->ignore_suspend)
1210 if (driver->playback.stream_name != NULL)
1211 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1212 SND_SOC_DAPM_STREAM_RESUME);
1214 if (driver->capture.stream_name != NULL)
1215 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1216 SND_SOC_DAPM_STREAM_RESUME);
1219 /* unmute any active DACs */
1220 for (i = 0; i < card->num_rtd; i++) {
1221 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1222 struct snd_soc_dai_driver *drv = dai->driver;
1224 if (card->rtd[i].dai_link->ignore_suspend)
1227 if (drv->ops->digital_mute && dai->playback_active)
1228 drv->ops->digital_mute(dai, 0);
1231 for (i = 0; i < card->num_rtd; i++) {
1232 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1233 struct snd_soc_platform *platform = card->rtd[i].platform;
1235 if (card->rtd[i].dai_link->ignore_suspend)
1238 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1239 cpu_dai->driver->resume(cpu_dai);
1240 if (platform->driver->resume && platform->suspended) {
1241 platform->driver->resume(cpu_dai);
1242 platform->suspended = 0;
1246 if (card->resume_post)
1247 card->resume_post(card);
1249 dev_dbg(card->dev, "resume work completed\n");
1251 /* userspace can access us now we are back as we were before */
1252 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1255 /* powers up audio subsystem after a suspend */
1256 int snd_soc_resume(struct device *dev)
1258 struct snd_soc_card *card = dev_get_drvdata(dev);
1259 int i, ac97_control = 0;
1261 /* AC97 devices might have other drivers hanging off them so
1262 * need to resume immediately. Other drivers don't have that
1263 * problem and may take a substantial amount of time to resume
1264 * due to I/O costs and anti-pop so handle them out of line.
1266 for (i = 0; i < card->num_rtd; i++) {
1267 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1268 ac97_control |= cpu_dai->driver->ac97_control;
1271 dev_dbg(dev, "Resuming AC97 immediately\n");
1272 soc_resume_deferred(&card->deferred_resume_work);
1274 dev_dbg(dev, "Scheduling resume work\n");
1275 if (!schedule_work(&card->deferred_resume_work))
1276 dev_err(dev, "resume work item may be lost\n");
1281 EXPORT_SYMBOL_GPL(snd_soc_resume);
1283 #define snd_soc_suspend NULL
1284 #define snd_soc_resume NULL
1287 static struct snd_soc_dai_ops null_dai_ops = {
1290 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1292 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1293 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1294 struct snd_soc_codec *codec;
1295 struct snd_soc_platform *platform;
1296 struct snd_soc_dai *codec_dai, *cpu_dai;
1297 const char *platform_name;
1301 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1303 /* do we already have the CPU DAI for this link ? */
1307 /* no, then find CPU DAI from registered DAIs*/
1308 list_for_each_entry(cpu_dai, &dai_list, list) {
1309 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1310 rtd->cpu_dai = cpu_dai;
1314 dev_dbg(card->dev, "CPU DAI %s not registered\n",
1315 dai_link->cpu_dai_name);
1318 /* do we already have the CODEC for this link ? */
1323 /* no, then find CODEC from registered CODECs*/
1324 list_for_each_entry(codec, &codec_list, list) {
1325 if (!strcmp(codec->name, dai_link->codec_name)) {
1328 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1329 list_for_each_entry(codec_dai, &dai_list, list) {
1330 if (codec->dev == codec_dai->dev &&
1331 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1332 rtd->codec_dai = codec_dai;
1336 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1337 dai_link->codec_dai_name);
1342 dev_dbg(card->dev, "CODEC %s not registered\n",
1343 dai_link->codec_name);
1346 /* do we need a platform? */
1350 /* if there's no platform we match on the empty platform */
1351 platform_name = dai_link->platform_name;
1353 platform_name = "snd-soc-dummy";
1355 /* no, then find one from the set of registered platforms */
1356 list_for_each_entry(platform, &platform_list, list) {
1357 if (!strcmp(platform->name, platform_name)) {
1358 rtd->platform = platform;
1363 dev_dbg(card->dev, "platform %s not registered\n",
1364 dai_link->platform_name);
1368 /* mark rtd as complete if we found all 4 of our client devices */
1369 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1376 static void soc_remove_codec(struct snd_soc_codec *codec)
1380 if (codec->driver->remove) {
1381 err = codec->driver->remove(codec);
1384 "asoc: failed to remove %s: %d\n",
1388 /* Make sure all DAPM widgets are freed */
1389 snd_soc_dapm_free(&codec->dapm);
1391 soc_cleanup_codec_debugfs(codec);
1393 list_del(&codec->card_list);
1394 module_put(codec->dev->driver->owner);
1397 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1399 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1400 struct snd_soc_codec *codec = rtd->codec;
1401 struct snd_soc_platform *platform = rtd->platform;
1402 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1405 /* unregister the rtd device */
1406 if (rtd->dev_registered) {
1407 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1408 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1409 device_unregister(&rtd->dev);
1410 rtd->dev_registered = 0;
1413 /* remove the CODEC DAI */
1414 if (codec_dai && codec_dai->probed) {
1415 if (codec_dai->driver->remove) {
1416 err = codec_dai->driver->remove(codec_dai);
1418 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1420 codec_dai->probed = 0;
1421 list_del(&codec_dai->card_list);
1424 /* remove the platform */
1425 if (platform && platform->probed) {
1426 if (platform->driver->remove) {
1427 err = platform->driver->remove(platform);
1429 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1431 platform->probed = 0;
1432 list_del(&platform->card_list);
1433 module_put(platform->dev->driver->owner);
1436 /* remove the CODEC */
1437 if (codec && codec->probed)
1438 soc_remove_codec(codec);
1440 /* remove the cpu_dai */
1441 if (cpu_dai && cpu_dai->probed) {
1442 if (cpu_dai->driver->remove) {
1443 err = cpu_dai->driver->remove(cpu_dai);
1445 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1447 cpu_dai->probed = 0;
1448 list_del(&cpu_dai->card_list);
1449 module_put(cpu_dai->dev->driver->owner);
1453 static void soc_remove_dai_links(struct snd_soc_card *card)
1457 for (i = 0; i < card->num_rtd; i++)
1458 soc_remove_dai_link(card, i);
1463 static void soc_set_name_prefix(struct snd_soc_card *card,
1464 struct snd_soc_codec *codec)
1468 if (card->codec_conf == NULL)
1471 for (i = 0; i < card->num_configs; i++) {
1472 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1473 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1474 codec->name_prefix = map->name_prefix;
1480 static int soc_probe_codec(struct snd_soc_card *card,
1481 struct snd_soc_codec *codec)
1484 const struct snd_soc_codec_driver *driver = codec->driver;
1487 codec->dapm.card = card;
1488 soc_set_name_prefix(card, codec);
1490 if (!try_module_get(codec->dev->driver->owner))
1493 soc_init_codec_debugfs(codec);
1495 if (driver->dapm_widgets)
1496 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1497 driver->num_dapm_widgets);
1499 if (driver->probe) {
1500 ret = driver->probe(codec);
1503 "asoc: failed to probe CODEC %s: %d\n",
1509 if (driver->controls)
1510 snd_soc_add_controls(codec, driver->controls,
1511 driver->num_controls);
1512 if (driver->dapm_routes)
1513 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1514 driver->num_dapm_routes);
1516 /* mark codec as probed and add to card codec list */
1518 list_add(&codec->card_list, &card->codec_dev_list);
1519 list_add(&codec->dapm.list, &card->dapm_list);
1524 soc_cleanup_codec_debugfs(codec);
1525 module_put(codec->dev->driver->owner);
1530 static void rtd_release(struct device *dev) {}
1532 static int soc_post_component_init(struct snd_soc_card *card,
1533 struct snd_soc_codec *codec,
1534 int num, int dailess)
1536 struct snd_soc_dai_link *dai_link = NULL;
1537 struct snd_soc_aux_dev *aux_dev = NULL;
1538 struct snd_soc_pcm_runtime *rtd;
1539 const char *temp, *name;
1543 dai_link = &card->dai_link[num];
1544 rtd = &card->rtd[num];
1545 name = dai_link->name;
1547 aux_dev = &card->aux_dev[num];
1548 rtd = &card->rtd_aux[num];
1549 name = aux_dev->name;
1553 /* machine controls, routes and widgets are not prefixed */
1554 temp = codec->name_prefix;
1555 codec->name_prefix = NULL;
1557 /* do machine specific initialization */
1558 if (!dailess && dai_link->init)
1559 ret = dai_link->init(rtd);
1560 else if (dailess && aux_dev->init)
1561 ret = aux_dev->init(&codec->dapm);
1563 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1566 codec->name_prefix = temp;
1568 /* Make sure all DAPM widgets are instantiated */
1569 snd_soc_dapm_new_widgets(&codec->dapm);
1571 /* register the rtd device */
1573 rtd->dev.parent = card->dev;
1574 rtd->dev.release = rtd_release;
1575 rtd->dev.init_name = name;
1576 ret = device_register(&rtd->dev);
1579 "asoc: failed to register runtime device: %d\n", ret);
1582 rtd->dev_registered = 1;
1584 /* add DAPM sysfs entries for this codec */
1585 ret = snd_soc_dapm_sys_add(&rtd->dev);
1588 "asoc: failed to add codec dapm sysfs entries: %d\n",
1591 /* add codec sysfs entries */
1592 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1595 "asoc: failed to add codec sysfs files: %d\n", ret);
1600 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1602 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1603 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1604 struct snd_soc_codec *codec = rtd->codec;
1605 struct snd_soc_platform *platform = rtd->platform;
1606 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1609 dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1611 /* config components */
1612 codec_dai->codec = codec;
1613 cpu_dai->platform = platform;
1614 codec_dai->card = card;
1615 cpu_dai->card = card;
1617 /* set default power off timeout */
1618 rtd->pmdown_time = pmdown_time;
1620 /* probe the cpu_dai */
1621 if (!cpu_dai->probed) {
1622 if (!try_module_get(cpu_dai->dev->driver->owner))
1625 if (cpu_dai->driver->probe) {
1626 ret = cpu_dai->driver->probe(cpu_dai);
1628 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1630 module_put(cpu_dai->dev->driver->owner);
1634 cpu_dai->probed = 1;
1635 /* mark cpu_dai as probed and add to card cpu_dai list */
1636 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1639 /* probe the CODEC */
1640 if (!codec->probed) {
1641 ret = soc_probe_codec(card, codec);
1646 /* probe the platform */
1647 if (!platform->probed) {
1648 if (!try_module_get(platform->dev->driver->owner))
1651 if (platform->driver->probe) {
1652 ret = platform->driver->probe(platform);
1654 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1656 module_put(platform->dev->driver->owner);
1660 /* mark platform as probed and add to card platform list */
1661 platform->probed = 1;
1662 list_add(&platform->card_list, &card->platform_dev_list);
1665 /* probe the CODEC DAI */
1666 if (!codec_dai->probed) {
1667 if (codec_dai->driver->probe) {
1668 ret = codec_dai->driver->probe(codec_dai);
1670 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1676 /* mark cpu_dai as probed and add to card cpu_dai list */
1677 codec_dai->probed = 1;
1678 list_add(&codec_dai->card_list, &card->dai_dev_list);
1681 /* DAPM dai link stream work */
1682 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1684 ret = soc_post_component_init(card, codec, num, 0);
1688 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1690 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1692 /* create the pcm */
1693 ret = soc_new_pcm(rtd, num);
1695 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1699 /* add platform data for AC97 devices */
1700 if (rtd->codec_dai->driver->ac97_control)
1701 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1706 #ifdef CONFIG_SND_SOC_AC97_BUS
1707 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1711 /* Only instantiate AC97 if not already done by the adaptor
1712 * for the generic AC97 subsystem.
1714 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1716 * It is possible that the AC97 device is already registered to
1717 * the device subsystem. This happens when the device is created
1718 * via snd_ac97_mixer(). Currently only SoC codec that does so
1719 * is the generic AC97 glue but others migh emerge.
1721 * In those cases we don't try to register the device again.
1723 if (!rtd->codec->ac97_created)
1726 ret = soc_ac97_dev_register(rtd->codec);
1728 printk(KERN_ERR "asoc: AC97 device register failed\n");
1732 rtd->codec->ac97_registered = 1;
1737 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1739 if (codec->ac97_registered) {
1740 soc_ac97_dev_unregister(codec);
1741 codec->ac97_registered = 0;
1746 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1748 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1749 struct snd_soc_codec *codec;
1752 /* find CODEC from registered CODECs*/
1753 list_for_each_entry(codec, &codec_list, list) {
1754 if (!strcmp(codec->name, aux_dev->codec_name)) {
1755 if (codec->probed) {
1757 "asoc: codec already probed");
1764 /* codec not found */
1765 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1769 ret = soc_probe_codec(card, codec);
1773 ret = soc_post_component_init(card, codec, num, 1);
1779 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1781 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1782 struct snd_soc_codec *codec = rtd->codec;
1784 /* unregister the rtd device */
1785 if (rtd->dev_registered) {
1786 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1787 device_unregister(&rtd->dev);
1788 rtd->dev_registered = 0;
1791 if (codec && codec->probed)
1792 soc_remove_codec(codec);
1795 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1796 enum snd_soc_compress_type compress_type)
1800 if (codec->cache_init)
1803 /* override the compress_type if necessary */
1804 if (compress_type && codec->compress_type != compress_type)
1805 codec->compress_type = compress_type;
1806 ret = snd_soc_cache_init(codec);
1808 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1812 codec->cache_init = 1;
1816 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1818 struct snd_soc_codec *codec;
1819 struct snd_soc_codec_conf *codec_conf;
1820 enum snd_soc_compress_type compress_type;
1823 mutex_lock(&card->mutex);
1825 if (card->instantiated) {
1826 mutex_unlock(&card->mutex);
1831 for (i = 0; i < card->num_links; i++)
1832 soc_bind_dai_link(card, i);
1834 /* bind completed ? */
1835 if (card->num_rtd != card->num_links) {
1836 mutex_unlock(&card->mutex);
1840 /* initialize the register cache for each available codec */
1841 list_for_each_entry(codec, &codec_list, list) {
1842 if (codec->cache_init)
1844 /* by default we don't override the compress_type */
1846 /* check to see if we need to override the compress_type */
1847 for (i = 0; i < card->num_configs; ++i) {
1848 codec_conf = &card->codec_conf[i];
1849 if (!strcmp(codec->name, codec_conf->dev_name)) {
1850 compress_type = codec_conf->compress_type;
1851 if (compress_type && compress_type
1852 != codec->compress_type)
1856 ret = snd_soc_init_codec_cache(codec, compress_type);
1858 mutex_unlock(&card->mutex);
1863 /* card bind complete so register a sound card */
1864 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1865 card->owner, 0, &card->snd_card);
1867 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1869 mutex_unlock(&card->mutex);
1872 card->snd_card->dev = card->dev;
1874 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1875 card->dapm.dev = card->dev;
1876 card->dapm.card = card;
1877 list_add(&card->dapm.list, &card->dapm_list);
1879 #ifdef CONFIG_DEBUG_FS
1880 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1883 #ifdef CONFIG_PM_SLEEP
1884 /* deferred resume work */
1885 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1888 if (card->dapm_widgets)
1889 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1890 card->num_dapm_widgets);
1892 /* initialise the sound card only once */
1894 ret = card->probe(card);
1896 goto card_probe_error;
1899 for (i = 0; i < card->num_links; i++) {
1900 ret = soc_probe_dai_link(card, i);
1902 pr_err("asoc: failed to instantiate card %s: %d\n",
1908 for (i = 0; i < card->num_aux_devs; i++) {
1909 ret = soc_probe_aux_dev(card, i);
1911 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1913 goto probe_aux_dev_err;
1917 /* We should have a non-codec control add function but we don't */
1919 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1920 struct snd_soc_codec,
1923 card->num_controls);
1925 if (card->dapm_routes)
1926 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1927 card->num_dapm_routes);
1929 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1931 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1932 "%s", card->long_name ? card->long_name : card->name);
1933 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1934 "%s", card->driver_name ? card->driver_name : card->name);
1936 if (card->late_probe) {
1937 ret = card->late_probe(card);
1939 dev_err(card->dev, "%s late_probe() failed: %d\n",
1941 goto probe_aux_dev_err;
1945 ret = snd_card_register(card->snd_card);
1947 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1948 goto probe_aux_dev_err;
1951 #ifdef CONFIG_SND_SOC_AC97_BUS
1952 /* register any AC97 codecs */
1953 for (i = 0; i < card->num_rtd; i++) {
1954 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1956 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1958 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1959 goto probe_aux_dev_err;
1964 card->instantiated = 1;
1965 mutex_unlock(&card->mutex);
1969 for (i = 0; i < card->num_aux_devs; i++)
1970 soc_remove_aux_dev(card, i);
1973 soc_remove_dai_links(card);
1979 snd_card_free(card->snd_card);
1981 mutex_unlock(&card->mutex);
1985 * Attempt to initialise any uninitialised cards. Must be called with
1988 static void snd_soc_instantiate_cards(void)
1990 struct snd_soc_card *card;
1991 list_for_each_entry(card, &card_list, list)
1992 snd_soc_instantiate_card(card);
1995 /* probes a new socdev */
1996 static int soc_probe(struct platform_device *pdev)
1998 struct snd_soc_card *card = platform_get_drvdata(pdev);
2002 * no card, so machine driver should be registering card
2003 * we should not be here in that case so ret error
2008 /* Bodge while we unpick instantiation */
2009 card->dev = &pdev->dev;
2011 ret = snd_soc_register_card(card);
2013 dev_err(&pdev->dev, "Failed to register card\n");
2020 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2024 /* make sure any delayed work runs */
2025 for (i = 0; i < card->num_rtd; i++) {
2026 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2027 flush_delayed_work_sync(&rtd->delayed_work);
2030 /* remove auxiliary devices */
2031 for (i = 0; i < card->num_aux_devs; i++)
2032 soc_remove_aux_dev(card, i);
2034 /* remove and free each DAI */
2035 soc_remove_dai_links(card);
2037 soc_cleanup_card_debugfs(card);
2039 /* remove the card */
2043 snd_soc_dapm_free(&card->dapm);
2046 snd_card_free(card->snd_card);
2051 /* removes a socdev */
2052 static int soc_remove(struct platform_device *pdev)
2054 struct snd_soc_card *card = platform_get_drvdata(pdev);
2056 snd_soc_unregister_card(card);
2060 int snd_soc_poweroff(struct device *dev)
2062 struct snd_soc_card *card = dev_get_drvdata(dev);
2065 if (!card->instantiated)
2068 /* Flush out pmdown_time work - we actually do want to run it
2069 * now, we're shutting down so no imminent restart. */
2070 for (i = 0; i < card->num_rtd; i++) {
2071 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2072 flush_delayed_work_sync(&rtd->delayed_work);
2075 snd_soc_dapm_shutdown(card);
2079 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2081 const struct dev_pm_ops snd_soc_pm_ops = {
2082 .suspend = snd_soc_suspend,
2083 .resume = snd_soc_resume,
2084 .poweroff = snd_soc_poweroff,
2086 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2088 /* ASoC platform driver */
2089 static struct platform_driver soc_driver = {
2091 .name = "soc-audio",
2092 .owner = THIS_MODULE,
2093 .pm = &snd_soc_pm_ops,
2096 .remove = soc_remove,
2099 /* create a new pcm */
2100 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2102 struct snd_soc_codec *codec = rtd->codec;
2103 struct snd_soc_platform *platform = rtd->platform;
2104 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2105 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2106 struct snd_pcm *pcm;
2108 int ret = 0, playback = 0, capture = 0;
2110 /* check client and interface hw capabilities */
2111 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2112 rtd->dai_link->stream_name, codec_dai->name, num);
2114 if (codec_dai->driver->playback.channels_min)
2116 if (codec_dai->driver->capture.channels_min)
2119 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2120 ret = snd_pcm_new(rtd->card->snd_card, new_name,
2121 num, playback, capture, &pcm);
2123 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2128 pcm->private_data = rtd;
2129 if (platform->driver->ops) {
2130 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2131 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2132 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2133 soc_pcm_ops.copy = platform->driver->ops->copy;
2134 soc_pcm_ops.silence = platform->driver->ops->silence;
2135 soc_pcm_ops.ack = platform->driver->ops->ack;
2136 soc_pcm_ops.page = platform->driver->ops->page;
2140 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2143 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2145 if (platform->driver->pcm_new) {
2146 ret = platform->driver->pcm_new(rtd->card->snd_card,
2149 pr_err("asoc: platform pcm constructor failed\n");
2154 pcm->private_free = platform->driver->pcm_free;
2155 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2161 * snd_soc_codec_volatile_register: Report if a register is volatile.
2163 * @codec: CODEC to query.
2164 * @reg: Register to query.
2166 * Boolean function indiciating if a CODEC register is volatile.
2168 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2171 if (codec->volatile_register)
2172 return codec->volatile_register(codec, reg);
2176 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2179 * snd_soc_codec_readable_register: Report if a register is readable.
2181 * @codec: CODEC to query.
2182 * @reg: Register to query.
2184 * Boolean function indicating if a CODEC register is readable.
2186 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2189 if (codec->readable_register)
2190 return codec->readable_register(codec, reg);
2194 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2197 * snd_soc_codec_writable_register: Report if a register is writable.
2199 * @codec: CODEC to query.
2200 * @reg: Register to query.
2202 * Boolean function indicating if a CODEC register is writable.
2204 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2207 if (codec->writable_register)
2208 return codec->writable_register(codec, reg);
2212 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2215 * snd_soc_new_ac97_codec - initailise AC97 device
2216 * @codec: audio codec
2217 * @ops: AC97 bus operations
2218 * @num: AC97 codec number
2220 * Initialises AC97 codec resources for use by ad-hoc devices only.
2222 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2223 struct snd_ac97_bus_ops *ops, int num)
2225 mutex_lock(&codec->mutex);
2227 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2228 if (codec->ac97 == NULL) {
2229 mutex_unlock(&codec->mutex);
2233 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2234 if (codec->ac97->bus == NULL) {
2237 mutex_unlock(&codec->mutex);
2241 codec->ac97->bus->ops = ops;
2242 codec->ac97->num = num;
2245 * Mark the AC97 device to be created by us. This way we ensure that the
2246 * device will be registered with the device subsystem later on.
2248 codec->ac97_created = 1;
2250 mutex_unlock(&codec->mutex);
2253 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2256 * snd_soc_free_ac97_codec - free AC97 codec device
2257 * @codec: audio codec
2259 * Frees AC97 codec device resources.
2261 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2263 mutex_lock(&codec->mutex);
2264 #ifdef CONFIG_SND_SOC_AC97_BUS
2265 soc_unregister_ac97_dai_link(codec);
2267 kfree(codec->ac97->bus);
2270 codec->ac97_created = 0;
2271 mutex_unlock(&codec->mutex);
2273 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2275 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2279 ret = codec->read(codec, reg);
2280 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2281 trace_snd_soc_reg_read(codec, reg, ret);
2285 EXPORT_SYMBOL_GPL(snd_soc_read);
2287 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2288 unsigned int reg, unsigned int val)
2290 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2291 trace_snd_soc_reg_write(codec, reg, val);
2292 return codec->write(codec, reg, val);
2294 EXPORT_SYMBOL_GPL(snd_soc_write);
2296 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2297 unsigned int reg, const void *data, size_t len)
2299 return codec->bulk_write_raw(codec, reg, data, len);
2301 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2304 * snd_soc_update_bits - update codec register bits
2305 * @codec: audio codec
2306 * @reg: codec register
2307 * @mask: register mask
2310 * Writes new register value.
2312 * Returns 1 for change, 0 for no change, or negative error code.
2314 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2315 unsigned int mask, unsigned int value)
2318 unsigned int old, new;
2321 ret = snd_soc_read(codec, reg);
2326 new = (old & ~mask) | (value & mask);
2327 change = old != new;
2329 ret = snd_soc_write(codec, reg, new);
2336 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2339 * snd_soc_update_bits_locked - update codec register bits
2340 * @codec: audio codec
2341 * @reg: codec register
2342 * @mask: register mask
2345 * Writes new register value, and takes the codec mutex.
2347 * Returns 1 for change else 0.
2349 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2350 unsigned short reg, unsigned int mask,
2355 mutex_lock(&codec->mutex);
2356 change = snd_soc_update_bits(codec, reg, mask, value);
2357 mutex_unlock(&codec->mutex);
2361 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2364 * snd_soc_test_bits - test register for change
2365 * @codec: audio codec
2366 * @reg: codec register
2367 * @mask: register mask
2370 * Tests a register with a new value and checks if the new value is
2371 * different from the old value.
2373 * Returns 1 for change else 0.
2375 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2376 unsigned int mask, unsigned int value)
2379 unsigned int old, new;
2381 old = snd_soc_read(codec, reg);
2382 new = (old & ~mask) | value;
2383 change = old != new;
2387 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2390 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2391 * @substream: the pcm substream
2392 * @hw: the hardware parameters
2394 * Sets the substream runtime hardware parameters.
2396 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2397 const struct snd_pcm_hardware *hw)
2399 struct snd_pcm_runtime *runtime = substream->runtime;
2400 runtime->hw.info = hw->info;
2401 runtime->hw.formats = hw->formats;
2402 runtime->hw.period_bytes_min = hw->period_bytes_min;
2403 runtime->hw.period_bytes_max = hw->period_bytes_max;
2404 runtime->hw.periods_min = hw->periods_min;
2405 runtime->hw.periods_max = hw->periods_max;
2406 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2407 runtime->hw.fifo_size = hw->fifo_size;
2410 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2413 * snd_soc_cnew - create new control
2414 * @_template: control template
2415 * @data: control private data
2416 * @long_name: control long name
2417 * @prefix: control name prefix
2419 * Create a new mixer control from a template control.
2421 * Returns 0 for success, else error.
2423 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2424 void *data, char *long_name,
2427 struct snd_kcontrol_new template;
2428 struct snd_kcontrol *kcontrol;
2432 memcpy(&template, _template, sizeof(template));
2436 long_name = template.name;
2439 name_len = strlen(long_name) + strlen(prefix) + 2;
2440 name = kmalloc(name_len, GFP_ATOMIC);
2444 snprintf(name, name_len, "%s %s", prefix, long_name);
2446 template.name = name;
2448 template.name = long_name;
2451 kcontrol = snd_ctl_new1(&template, data);
2457 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2460 * snd_soc_add_controls - add an array of controls to a codec.
2461 * Convienience function to add a list of controls. Many codecs were
2462 * duplicating this code.
2464 * @codec: codec to add controls to
2465 * @controls: array of controls to add
2466 * @num_controls: number of elements in the array
2468 * Return 0 for success, else error.
2470 int snd_soc_add_controls(struct snd_soc_codec *codec,
2471 const struct snd_kcontrol_new *controls, int num_controls)
2473 struct snd_card *card = codec->card->snd_card;
2476 for (i = 0; i < num_controls; i++) {
2477 const struct snd_kcontrol_new *control = &controls[i];
2478 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2480 codec->name_prefix));
2482 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2483 codec->name, control->name, err);
2490 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2493 * snd_soc_info_enum_double - enumerated double mixer info callback
2494 * @kcontrol: mixer control
2495 * @uinfo: control element information
2497 * Callback to provide information about a double enumerated
2500 * Returns 0 for success.
2502 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2503 struct snd_ctl_elem_info *uinfo)
2505 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2507 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2508 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2509 uinfo->value.enumerated.items = e->max;
2511 if (uinfo->value.enumerated.item > e->max - 1)
2512 uinfo->value.enumerated.item = e->max - 1;
2513 strcpy(uinfo->value.enumerated.name,
2514 e->texts[uinfo->value.enumerated.item]);
2517 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2520 * snd_soc_get_enum_double - enumerated double mixer get callback
2521 * @kcontrol: mixer control
2522 * @ucontrol: control element information
2524 * Callback to get the value of a double enumerated mixer.
2526 * Returns 0 for success.
2528 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2529 struct snd_ctl_elem_value *ucontrol)
2531 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2532 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2533 unsigned int val, bitmask;
2535 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2537 val = snd_soc_read(codec, e->reg);
2538 ucontrol->value.enumerated.item[0]
2539 = (val >> e->shift_l) & (bitmask - 1);
2540 if (e->shift_l != e->shift_r)
2541 ucontrol->value.enumerated.item[1] =
2542 (val >> e->shift_r) & (bitmask - 1);
2546 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2549 * snd_soc_put_enum_double - enumerated double mixer put callback
2550 * @kcontrol: mixer control
2551 * @ucontrol: control element information
2553 * Callback to set the value of a double enumerated mixer.
2555 * Returns 0 for success.
2557 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2558 struct snd_ctl_elem_value *ucontrol)
2560 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2561 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2563 unsigned int mask, bitmask;
2565 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2567 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2569 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2570 mask = (bitmask - 1) << e->shift_l;
2571 if (e->shift_l != e->shift_r) {
2572 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2574 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2575 mask |= (bitmask - 1) << e->shift_r;
2578 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2580 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2583 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2584 * @kcontrol: mixer control
2585 * @ucontrol: control element information
2587 * Callback to get the value of a double semi enumerated mixer.
2589 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2590 * used for handling bitfield coded enumeration for example.
2592 * Returns 0 for success.
2594 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2595 struct snd_ctl_elem_value *ucontrol)
2597 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2598 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2599 unsigned int reg_val, val, mux;
2601 reg_val = snd_soc_read(codec, e->reg);
2602 val = (reg_val >> e->shift_l) & e->mask;
2603 for (mux = 0; mux < e->max; mux++) {
2604 if (val == e->values[mux])
2607 ucontrol->value.enumerated.item[0] = mux;
2608 if (e->shift_l != e->shift_r) {
2609 val = (reg_val >> e->shift_r) & e->mask;
2610 for (mux = 0; mux < e->max; mux++) {
2611 if (val == e->values[mux])
2614 ucontrol->value.enumerated.item[1] = mux;
2619 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2622 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2623 * @kcontrol: mixer control
2624 * @ucontrol: control element information
2626 * Callback to set the value of a double semi enumerated mixer.
2628 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2629 * used for handling bitfield coded enumeration for example.
2631 * Returns 0 for success.
2633 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2634 struct snd_ctl_elem_value *ucontrol)
2636 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2637 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2641 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2643 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2644 mask = e->mask << e->shift_l;
2645 if (e->shift_l != e->shift_r) {
2646 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2648 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2649 mask |= e->mask << e->shift_r;
2652 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2654 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2657 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2658 * @kcontrol: mixer control
2659 * @uinfo: control element information
2661 * Callback to provide information about an external enumerated
2664 * Returns 0 for success.
2666 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2667 struct snd_ctl_elem_info *uinfo)
2669 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2671 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2673 uinfo->value.enumerated.items = e->max;
2675 if (uinfo->value.enumerated.item > e->max - 1)
2676 uinfo->value.enumerated.item = e->max - 1;
2677 strcpy(uinfo->value.enumerated.name,
2678 e->texts[uinfo->value.enumerated.item]);
2681 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2684 * snd_soc_info_volsw_ext - external single mixer info callback
2685 * @kcontrol: mixer control
2686 * @uinfo: control element information
2688 * Callback to provide information about a single external mixer control.
2690 * Returns 0 for success.
2692 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2693 struct snd_ctl_elem_info *uinfo)
2695 int max = kcontrol->private_value;
2697 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2698 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2700 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2703 uinfo->value.integer.min = 0;
2704 uinfo->value.integer.max = max;
2707 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2710 * snd_soc_info_volsw - single mixer info callback
2711 * @kcontrol: mixer control
2712 * @uinfo: control element information
2714 * Callback to provide information about a single mixer control.
2716 * Returns 0 for success.
2718 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2719 struct snd_ctl_elem_info *uinfo)
2721 struct soc_mixer_control *mc =
2722 (struct soc_mixer_control *)kcontrol->private_value;
2724 unsigned int shift = mc->shift;
2725 unsigned int rshift = mc->rshift;
2727 if (!mc->platform_max)
2728 mc->platform_max = mc->max;
2729 platform_max = mc->platform_max;
2731 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2732 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2734 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2736 uinfo->count = shift == rshift ? 1 : 2;
2737 uinfo->value.integer.min = 0;
2738 uinfo->value.integer.max = platform_max;
2741 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2744 * snd_soc_get_volsw - single mixer get callback
2745 * @kcontrol: mixer control
2746 * @ucontrol: control element information
2748 * Callback to get the value of a single mixer control.
2750 * Returns 0 for success.
2752 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2753 struct snd_ctl_elem_value *ucontrol)
2755 struct soc_mixer_control *mc =
2756 (struct soc_mixer_control *)kcontrol->private_value;
2757 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2758 unsigned int reg = mc->reg;
2759 unsigned int shift = mc->shift;
2760 unsigned int rshift = mc->rshift;
2762 unsigned int mask = (1 << fls(max)) - 1;
2763 unsigned int invert = mc->invert;
2765 ucontrol->value.integer.value[0] =
2766 (snd_soc_read(codec, reg) >> shift) & mask;
2767 if (shift != rshift)
2768 ucontrol->value.integer.value[1] =
2769 (snd_soc_read(codec, reg) >> rshift) & mask;
2771 ucontrol->value.integer.value[0] =
2772 max - ucontrol->value.integer.value[0];
2773 if (shift != rshift)
2774 ucontrol->value.integer.value[1] =
2775 max - ucontrol->value.integer.value[1];
2780 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2783 * snd_soc_put_volsw - single mixer put callback
2784 * @kcontrol: mixer control
2785 * @ucontrol: control element information
2787 * Callback to set the value of a single mixer control.
2789 * Returns 0 for success.
2791 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2792 struct snd_ctl_elem_value *ucontrol)
2794 struct soc_mixer_control *mc =
2795 (struct soc_mixer_control *)kcontrol->private_value;
2796 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2797 unsigned int reg = mc->reg;
2798 unsigned int shift = mc->shift;
2799 unsigned int rshift = mc->rshift;
2801 unsigned int mask = (1 << fls(max)) - 1;
2802 unsigned int invert = mc->invert;
2803 unsigned int val, val2, val_mask;
2805 val = (ucontrol->value.integer.value[0] & mask);
2808 val_mask = mask << shift;
2810 if (shift != rshift) {
2811 val2 = (ucontrol->value.integer.value[1] & mask);
2814 val_mask |= mask << rshift;
2815 val |= val2 << rshift;
2817 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2819 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2822 * snd_soc_info_volsw_2r - double mixer info callback
2823 * @kcontrol: mixer control
2824 * @uinfo: control element information
2826 * Callback to provide information about a double mixer control that
2827 * spans 2 codec registers.
2829 * Returns 0 for success.
2831 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2832 struct snd_ctl_elem_info *uinfo)
2834 struct soc_mixer_control *mc =
2835 (struct soc_mixer_control *)kcontrol->private_value;
2838 if (!mc->platform_max)
2839 mc->platform_max = mc->max;
2840 platform_max = mc->platform_max;
2842 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2843 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2845 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2848 uinfo->value.integer.min = 0;
2849 uinfo->value.integer.max = platform_max;
2852 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2855 * snd_soc_get_volsw_2r - double mixer get callback
2856 * @kcontrol: mixer control
2857 * @ucontrol: control element information
2859 * Callback to get the value of a double mixer control that spans 2 registers.
2861 * Returns 0 for success.
2863 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2864 struct snd_ctl_elem_value *ucontrol)
2866 struct soc_mixer_control *mc =
2867 (struct soc_mixer_control *)kcontrol->private_value;
2868 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2869 unsigned int reg = mc->reg;
2870 unsigned int reg2 = mc->rreg;
2871 unsigned int shift = mc->shift;
2873 unsigned int mask = (1 << fls(max)) - 1;
2874 unsigned int invert = mc->invert;
2876 ucontrol->value.integer.value[0] =
2877 (snd_soc_read(codec, reg) >> shift) & mask;
2878 ucontrol->value.integer.value[1] =
2879 (snd_soc_read(codec, reg2) >> shift) & mask;
2881 ucontrol->value.integer.value[0] =
2882 max - ucontrol->value.integer.value[0];
2883 ucontrol->value.integer.value[1] =
2884 max - ucontrol->value.integer.value[1];
2889 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2892 * snd_soc_put_volsw_2r - double mixer set callback
2893 * @kcontrol: mixer control
2894 * @ucontrol: control element information
2896 * Callback to set the value of a double mixer control that spans 2 registers.
2898 * Returns 0 for success.
2900 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2901 struct snd_ctl_elem_value *ucontrol)
2903 struct soc_mixer_control *mc =
2904 (struct soc_mixer_control *)kcontrol->private_value;
2905 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2906 unsigned int reg = mc->reg;
2907 unsigned int reg2 = mc->rreg;
2908 unsigned int shift = mc->shift;
2910 unsigned int mask = (1 << fls(max)) - 1;
2911 unsigned int invert = mc->invert;
2913 unsigned int val, val2, val_mask;
2915 val_mask = mask << shift;
2916 val = (ucontrol->value.integer.value[0] & mask);
2917 val2 = (ucontrol->value.integer.value[1] & mask);
2925 val2 = val2 << shift;
2927 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2931 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2934 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2937 * snd_soc_info_volsw_s8 - signed mixer info callback
2938 * @kcontrol: mixer control
2939 * @uinfo: control element information
2941 * Callback to provide information about a signed mixer control.
2943 * Returns 0 for success.
2945 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2946 struct snd_ctl_elem_info *uinfo)
2948 struct soc_mixer_control *mc =
2949 (struct soc_mixer_control *)kcontrol->private_value;
2953 if (!mc->platform_max)
2954 mc->platform_max = mc->max;
2955 platform_max = mc->platform_max;
2957 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2959 uinfo->value.integer.min = 0;
2960 uinfo->value.integer.max = platform_max - min;
2963 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2966 * snd_soc_get_volsw_s8 - signed mixer get callback
2967 * @kcontrol: mixer control
2968 * @ucontrol: control element information
2970 * Callback to get the value of a signed mixer control.
2972 * Returns 0 for success.
2974 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2975 struct snd_ctl_elem_value *ucontrol)
2977 struct soc_mixer_control *mc =
2978 (struct soc_mixer_control *)kcontrol->private_value;
2979 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2980 unsigned int reg = mc->reg;
2982 int val = snd_soc_read(codec, reg);
2984 ucontrol->value.integer.value[0] =
2985 ((signed char)(val & 0xff))-min;
2986 ucontrol->value.integer.value[1] =
2987 ((signed char)((val >> 8) & 0xff))-min;
2990 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2993 * snd_soc_put_volsw_sgn - signed mixer put callback
2994 * @kcontrol: mixer control
2995 * @ucontrol: control element information
2997 * Callback to set the value of a signed mixer control.
2999 * Returns 0 for success.
3001 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
3002 struct snd_ctl_elem_value *ucontrol)
3004 struct soc_mixer_control *mc =
3005 (struct soc_mixer_control *)kcontrol->private_value;
3006 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3007 unsigned int reg = mc->reg;
3011 val = (ucontrol->value.integer.value[0]+min) & 0xff;
3012 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3014 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3016 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3019 * snd_soc_limit_volume - Set new limit to an existing volume control.
3021 * @codec: where to look for the control
3022 * @name: Name of the control
3023 * @max: new maximum limit
3025 * Return 0 for success, else error.
3027 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3028 const char *name, int max)
3030 struct snd_card *card = codec->card->snd_card;
3031 struct snd_kcontrol *kctl;
3032 struct soc_mixer_control *mc;
3036 /* Sanity check for name and max */
3037 if (unlikely(!name || max <= 0))
3040 list_for_each_entry(kctl, &card->controls, list) {
3041 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3047 mc = (struct soc_mixer_control *)kctl->private_value;
3048 if (max <= mc->max) {
3049 mc->platform_max = max;
3055 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3058 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
3059 * mixer info callback
3060 * @kcontrol: mixer control
3061 * @uinfo: control element information
3063 * Returns 0 for success.
3065 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3066 struct snd_ctl_elem_info *uinfo)
3068 struct soc_mixer_control *mc =
3069 (struct soc_mixer_control *)kcontrol->private_value;
3073 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3075 uinfo->value.integer.min = 0;
3076 uinfo->value.integer.max = max-min;
3080 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3083 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3084 * mixer get callback
3085 * @kcontrol: mixer control
3086 * @uinfo: control element information
3088 * Returns 0 for success.
3090 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3091 struct snd_ctl_elem_value *ucontrol)
3093 struct soc_mixer_control *mc =
3094 (struct soc_mixer_control *)kcontrol->private_value;
3095 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3096 unsigned int mask = (1<<mc->shift)-1;
3098 int val = snd_soc_read(codec, mc->reg) & mask;
3099 int valr = snd_soc_read(codec, mc->rreg) & mask;
3101 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3102 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3105 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3108 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3109 * mixer put callback
3110 * @kcontrol: mixer control
3111 * @uinfo: control element information
3113 * Returns 0 for success.
3115 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3116 struct snd_ctl_elem_value *ucontrol)
3118 struct soc_mixer_control *mc =
3119 (struct soc_mixer_control *)kcontrol->private_value;
3120 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3121 unsigned int mask = (1<<mc->shift)-1;
3124 unsigned int val, valr, oval, ovalr;
3126 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3128 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3131 oval = snd_soc_read(codec, mc->reg) & mask;
3132 ovalr = snd_soc_read(codec, mc->rreg) & mask;
3136 ret = snd_soc_write(codec, mc->reg, val);
3140 if (ovalr != valr) {
3141 ret = snd_soc_write(codec, mc->rreg, valr);
3148 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3151 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3153 * @clk_id: DAI specific clock ID
3154 * @freq: new clock frequency in Hz
3155 * @dir: new clock direction - input/output.
3157 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3159 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3160 unsigned int freq, int dir)
3162 if (dai->driver && dai->driver->ops->set_sysclk)
3163 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3164 else if (dai->codec && dai->codec->driver->set_sysclk)
3165 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3170 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3173 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3175 * @clk_id: DAI specific clock ID
3176 * @freq: new clock frequency in Hz
3177 * @dir: new clock direction - input/output.
3179 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3181 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3182 unsigned int freq, int dir)
3184 if (codec->driver->set_sysclk)
3185 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3189 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3192 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3194 * @div_id: DAI specific clock divider ID
3195 * @div: new clock divisor.
3197 * Configures the clock dividers. This is used to derive the best DAI bit and
3198 * frame clocks from the system or master clock. It's best to set the DAI bit
3199 * and frame clocks as low as possible to save system power.
3201 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3202 int div_id, int div)
3204 if (dai->driver && dai->driver->ops->set_clkdiv)
3205 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3209 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3212 * snd_soc_dai_set_pll - configure DAI PLL.
3214 * @pll_id: DAI specific PLL ID
3215 * @source: DAI specific source for the PLL
3216 * @freq_in: PLL input clock frequency in Hz
3217 * @freq_out: requested PLL output clock frequency in Hz
3219 * Configures and enables PLL to generate output clock based on input clock.
3221 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3222 unsigned int freq_in, unsigned int freq_out)
3224 if (dai->driver && dai->driver->ops->set_pll)
3225 return dai->driver->ops->set_pll(dai, pll_id, source,
3227 else if (dai->codec && dai->codec->driver->set_pll)
3228 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3233 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3236 * snd_soc_codec_set_pll - configure codec PLL.
3238 * @pll_id: DAI specific PLL ID
3239 * @source: DAI specific source for the PLL
3240 * @freq_in: PLL input clock frequency in Hz
3241 * @freq_out: requested PLL output clock frequency in Hz
3243 * Configures and enables PLL to generate output clock based on input clock.
3245 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3246 unsigned int freq_in, unsigned int freq_out)
3248 if (codec->driver->set_pll)
3249 return codec->driver->set_pll(codec, pll_id, source,
3254 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3257 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3259 * @fmt: SND_SOC_DAIFMT_ format value.
3261 * Configures the DAI hardware format and clocking.
3263 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3265 if (dai->driver && dai->driver->ops->set_fmt)
3266 return dai->driver->ops->set_fmt(dai, fmt);
3270 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3273 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3275 * @tx_mask: bitmask representing active TX slots.
3276 * @rx_mask: bitmask representing active RX slots.
3277 * @slots: Number of slots in use.
3278 * @slot_width: Width in bits for each slot.
3280 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3283 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3284 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3286 if (dai->driver && dai->driver->ops->set_tdm_slot)
3287 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3292 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3295 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3297 * @tx_num: how many TX channels
3298 * @tx_slot: pointer to an array which imply the TX slot number channel
3300 * @rx_num: how many RX channels
3301 * @rx_slot: pointer to an array which imply the RX slot number channel
3304 * configure the relationship between channel number and TDM slot number.
3306 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3307 unsigned int tx_num, unsigned int *tx_slot,
3308 unsigned int rx_num, unsigned int *rx_slot)
3310 if (dai->driver && dai->driver->ops->set_channel_map)
3311 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3316 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3319 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3321 * @tristate: tristate enable
3323 * Tristates the DAI so that others can use it.
3325 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3327 if (dai->driver && dai->driver->ops->set_tristate)
3328 return dai->driver->ops->set_tristate(dai, tristate);
3332 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3335 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3337 * @mute: mute enable
3339 * Mutes the DAI DAC.
3341 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3343 if (dai->driver && dai->driver->ops->digital_mute)
3344 return dai->driver->ops->digital_mute(dai, mute);
3348 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3351 * snd_soc_register_card - Register a card with the ASoC core
3353 * @card: Card to register
3356 int snd_soc_register_card(struct snd_soc_card *card)
3360 if (!card->name || !card->dev)
3363 dev_set_drvdata(card->dev, card);
3365 snd_soc_initialize_card_lists(card);
3367 soc_init_card_debugfs(card);
3369 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3370 (card->num_links + card->num_aux_devs),
3372 if (card->rtd == NULL)
3374 card->rtd_aux = &card->rtd[card->num_links];
3376 for (i = 0; i < card->num_links; i++)
3377 card->rtd[i].dai_link = &card->dai_link[i];
3379 INIT_LIST_HEAD(&card->list);
3380 card->instantiated = 0;
3381 mutex_init(&card->mutex);
3383 mutex_lock(&client_mutex);
3384 list_add(&card->list, &card_list);
3385 snd_soc_instantiate_cards();
3386 mutex_unlock(&client_mutex);
3388 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3392 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3395 * snd_soc_unregister_card - Unregister a card with the ASoC core
3397 * @card: Card to unregister
3400 int snd_soc_unregister_card(struct snd_soc_card *card)
3402 if (card->instantiated)
3403 soc_cleanup_card_resources(card);
3404 mutex_lock(&client_mutex);
3405 list_del(&card->list);
3406 mutex_unlock(&client_mutex);
3407 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3411 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3414 * Simplify DAI link configuration by removing ".-1" from device names
3415 * and sanitizing names.
3417 static char *fmt_single_name(struct device *dev, int *id)
3419 char *found, name[NAME_SIZE];
3422 if (dev_name(dev) == NULL)
3425 strlcpy(name, dev_name(dev), NAME_SIZE);
3427 /* are we a "%s.%d" name (platform and SPI components) */
3428 found = strstr(name, dev->driver->name);
3431 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3433 /* discard ID from name if ID == -1 */
3435 found[strlen(dev->driver->name)] = '\0';
3439 /* I2C component devices are named "bus-addr" */
3440 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3441 char tmp[NAME_SIZE];
3443 /* create unique ID number from I2C addr and bus */
3444 *id = ((id1 & 0xffff) << 16) + id2;
3446 /* sanitize component name for DAI link creation */
3447 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3448 strlcpy(name, tmp, NAME_SIZE);
3453 return kstrdup(name, GFP_KERNEL);
3457 * Simplify DAI link naming for single devices with multiple DAIs by removing
3458 * any ".-1" and using the DAI name (instead of device name).
3460 static inline char *fmt_multiple_name(struct device *dev,
3461 struct snd_soc_dai_driver *dai_drv)
3463 if (dai_drv->name == NULL) {
3464 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3469 return kstrdup(dai_drv->name, GFP_KERNEL);
3473 * snd_soc_register_dai - Register a DAI with the ASoC core
3475 * @dai: DAI to register
3477 int snd_soc_register_dai(struct device *dev,
3478 struct snd_soc_dai_driver *dai_drv)
3480 struct snd_soc_dai *dai;
3482 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3484 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3488 /* create DAI component name */
3489 dai->name = fmt_single_name(dev, &dai->id);
3490 if (dai->name == NULL) {
3496 dai->driver = dai_drv;
3497 if (!dai->driver->ops)
3498 dai->driver->ops = &null_dai_ops;
3500 mutex_lock(&client_mutex);
3501 list_add(&dai->list, &dai_list);
3502 snd_soc_instantiate_cards();
3503 mutex_unlock(&client_mutex);
3505 pr_debug("Registered DAI '%s'\n", dai->name);
3509 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3512 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3514 * @dai: DAI to unregister
3516 void snd_soc_unregister_dai(struct device *dev)
3518 struct snd_soc_dai *dai;
3520 list_for_each_entry(dai, &dai_list, list) {
3521 if (dev == dai->dev)
3527 mutex_lock(&client_mutex);
3528 list_del(&dai->list);
3529 mutex_unlock(&client_mutex);
3531 pr_debug("Unregistered DAI '%s'\n", dai->name);
3535 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3538 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3540 * @dai: Array of DAIs to register
3541 * @count: Number of DAIs
3543 int snd_soc_register_dais(struct device *dev,
3544 struct snd_soc_dai_driver *dai_drv, size_t count)
3546 struct snd_soc_dai *dai;
3549 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3551 for (i = 0; i < count; i++) {
3553 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3559 /* create DAI component name */
3560 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3561 if (dai->name == NULL) {
3568 dai->driver = &dai_drv[i];
3569 if (dai->driver->id)
3570 dai->id = dai->driver->id;
3573 if (!dai->driver->ops)
3574 dai->driver->ops = &null_dai_ops;
3576 mutex_lock(&client_mutex);
3577 list_add(&dai->list, &dai_list);
3578 mutex_unlock(&client_mutex);
3580 pr_debug("Registered DAI '%s'\n", dai->name);
3583 mutex_lock(&client_mutex);
3584 snd_soc_instantiate_cards();
3585 mutex_unlock(&client_mutex);
3589 for (i--; i >= 0; i--)
3590 snd_soc_unregister_dai(dev);
3594 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3597 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3599 * @dai: Array of DAIs to unregister
3600 * @count: Number of DAIs
3602 void snd_soc_unregister_dais(struct device *dev, size_t count)
3606 for (i = 0; i < count; i++)
3607 snd_soc_unregister_dai(dev);
3609 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3612 * snd_soc_register_platform - Register a platform with the ASoC core
3614 * @platform: platform to register
3616 int snd_soc_register_platform(struct device *dev,
3617 struct snd_soc_platform_driver *platform_drv)
3619 struct snd_soc_platform *platform;
3621 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3623 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3624 if (platform == NULL)
3627 /* create platform component name */
3628 platform->name = fmt_single_name(dev, &platform->id);
3629 if (platform->name == NULL) {
3634 platform->dev = dev;
3635 platform->driver = platform_drv;
3637 mutex_lock(&client_mutex);
3638 list_add(&platform->list, &platform_list);
3639 snd_soc_instantiate_cards();
3640 mutex_unlock(&client_mutex);
3642 pr_debug("Registered platform '%s'\n", platform->name);
3646 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3649 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3651 * @platform: platform to unregister
3653 void snd_soc_unregister_platform(struct device *dev)
3655 struct snd_soc_platform *platform;
3657 list_for_each_entry(platform, &platform_list, list) {
3658 if (dev == platform->dev)
3664 mutex_lock(&client_mutex);
3665 list_del(&platform->list);
3666 mutex_unlock(&client_mutex);
3668 pr_debug("Unregistered platform '%s'\n", platform->name);
3669 kfree(platform->name);
3672 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3674 static u64 codec_format_map[] = {
3675 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3676 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3677 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3678 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3679 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3680 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3681 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3682 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3683 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3684 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3685 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3686 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3687 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3688 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3689 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3690 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3693 /* Fix up the DAI formats for endianness: codecs don't actually see
3694 * the endianness of the data but we're using the CPU format
3695 * definitions which do need to include endianness so we ensure that
3696 * codec DAIs always have both big and little endian variants set.
3698 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3702 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3703 if (stream->formats & codec_format_map[i])
3704 stream->formats |= codec_format_map[i];
3708 * snd_soc_register_codec - Register a codec with the ASoC core
3710 * @codec: codec to register
3712 int snd_soc_register_codec(struct device *dev,
3713 const struct snd_soc_codec_driver *codec_drv,
3714 struct snd_soc_dai_driver *dai_drv,
3718 struct snd_soc_codec *codec;
3721 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3723 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3727 /* create CODEC component name */
3728 codec->name = fmt_single_name(dev, &codec->id);
3729 if (codec->name == NULL) {
3734 if (codec_drv->compress_type)
3735 codec->compress_type = codec_drv->compress_type;
3737 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3739 codec->write = codec_drv->write;
3740 codec->read = codec_drv->read;
3741 codec->volatile_register = codec_drv->volatile_register;
3742 codec->readable_register = codec_drv->readable_register;
3743 codec->writable_register = codec_drv->writable_register;
3744 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3745 codec->dapm.dev = dev;
3746 codec->dapm.codec = codec;
3747 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3749 codec->driver = codec_drv;
3750 codec->num_dai = num_dai;
3751 mutex_init(&codec->mutex);
3753 /* allocate CODEC register cache */
3754 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3755 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3756 codec->reg_size = reg_size;
3757 /* it is necessary to make a copy of the default register cache
3758 * because in the case of using a compression type that requires
3759 * the default register cache to be marked as __devinitconst the
3760 * kernel might have freed the array by the time we initialize
3763 if (codec_drv->reg_cache_default) {
3764 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3765 reg_size, GFP_KERNEL);
3766 if (!codec->reg_def_copy) {
3773 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3774 if (!codec->volatile_register)
3775 codec->volatile_register = snd_soc_default_volatile_register;
3776 if (!codec->readable_register)
3777 codec->readable_register = snd_soc_default_readable_register;
3778 if (!codec->writable_register)
3779 codec->writable_register = snd_soc_default_writable_register;
3782 for (i = 0; i < num_dai; i++) {
3783 fixup_codec_formats(&dai_drv[i].playback);
3784 fixup_codec_formats(&dai_drv[i].capture);
3787 /* register any DAIs */
3789 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3794 mutex_lock(&client_mutex);
3795 list_add(&codec->list, &codec_list);
3796 snd_soc_instantiate_cards();
3797 mutex_unlock(&client_mutex);
3799 pr_debug("Registered codec '%s'\n", codec->name);
3803 kfree(codec->reg_def_copy);
3804 codec->reg_def_copy = NULL;
3809 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3812 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3814 * @codec: codec to unregister
3816 void snd_soc_unregister_codec(struct device *dev)
3818 struct snd_soc_codec *codec;
3821 list_for_each_entry(codec, &codec_list, list) {
3822 if (dev == codec->dev)
3829 for (i = 0; i < codec->num_dai; i++)
3830 snd_soc_unregister_dai(dev);
3832 mutex_lock(&client_mutex);
3833 list_del(&codec->list);
3834 mutex_unlock(&client_mutex);
3836 pr_debug("Unregistered codec '%s'\n", codec->name);
3838 snd_soc_cache_exit(codec);
3839 kfree(codec->reg_def_copy);
3843 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3845 static int __init snd_soc_init(void)
3847 #ifdef CONFIG_DEBUG_FS
3848 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3849 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3851 "ASoC: Failed to create debugfs directory\n");
3852 snd_soc_debugfs_root = NULL;
3855 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3857 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3859 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3861 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3863 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3864 &platform_list_fops))
3865 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3868 snd_soc_util_init();
3870 return platform_driver_register(&soc_driver);
3872 module_init(snd_soc_init);
3874 static void __exit snd_soc_exit(void)
3876 snd_soc_util_exit();
3878 #ifdef CONFIG_DEBUG_FS
3879 debugfs_remove_recursive(snd_soc_debugfs_root);
3881 platform_driver_unregister(&soc_driver);
3883 module_exit(snd_soc_exit);
3885 /* Module information */
3886 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3887 MODULE_DESCRIPTION("ALSA SoC Core");
3888 MODULE_LICENSE("GPL");
3889 MODULE_ALIAS("platform:soc-audio");