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 = codec->driver->reg_word_size * 2;
96 int regsize = min_bytes_needed(codec->driver->reg_cache_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 = codec->driver->reg_word_size * 2;
136 regsize = min_bytes_needed(codec->driver->reg_cache_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 codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
306 codec->debugfs_codec_root);
307 if (!codec->dapm.debugfs_dapm)
309 "Failed to create DAPM debugfs directory\n");
311 snd_soc_dapm_debugfs_init(&codec->dapm);
314 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
316 debugfs_remove_recursive(codec->debugfs_codec_root);
319 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
320 size_t count, loff_t *ppos)
322 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
323 ssize_t len, ret = 0;
324 struct snd_soc_codec *codec;
329 list_for_each_entry(codec, &codec_list, list) {
330 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
334 if (ret > PAGE_SIZE) {
341 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
348 static const struct file_operations codec_list_fops = {
349 .read = codec_list_read_file,
350 .llseek = default_llseek,/* read accesses f_pos */
353 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
354 size_t count, loff_t *ppos)
356 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
357 ssize_t len, ret = 0;
358 struct snd_soc_dai *dai;
363 list_for_each_entry(dai, &dai_list, list) {
364 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
367 if (ret > PAGE_SIZE) {
373 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
380 static const struct file_operations dai_list_fops = {
381 .read = dai_list_read_file,
382 .llseek = default_llseek,/* read accesses f_pos */
385 static ssize_t platform_list_read_file(struct file *file,
386 char __user *user_buf,
387 size_t count, loff_t *ppos)
389 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
390 ssize_t len, ret = 0;
391 struct snd_soc_platform *platform;
396 list_for_each_entry(platform, &platform_list, list) {
397 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
401 if (ret > PAGE_SIZE) {
407 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
414 static const struct file_operations platform_list_fops = {
415 .read = platform_list_read_file,
416 .llseek = default_llseek,/* read accesses f_pos */
419 static void soc_init_card_debugfs(struct snd_soc_card *card)
421 card->debugfs_card_root = debugfs_create_dir(card->name,
422 snd_soc_debugfs_root);
423 if (!card->debugfs_card_root) {
425 "ASoC: Failed to create codec debugfs directory\n");
429 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
430 card->debugfs_card_root,
432 if (!card->debugfs_pop_time)
434 "Failed to create pop time debugfs file\n");
437 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
439 debugfs_remove_recursive(card->debugfs_card_root);
444 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
448 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
452 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
456 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
461 #ifdef CONFIG_SND_SOC_AC97_BUS
462 /* unregister ac97 codec */
463 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
465 if (codec->ac97->dev.bus)
466 device_unregister(&codec->ac97->dev);
470 /* stop no dev release warning */
471 static void soc_ac97_device_release(struct device *dev){}
473 /* register ac97 codec to bus */
474 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
478 codec->ac97->dev.bus = &ac97_bus_type;
479 codec->ac97->dev.parent = codec->card->dev;
480 codec->ac97->dev.release = soc_ac97_device_release;
482 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
483 codec->card->snd_card->number, 0, codec->name);
484 err = device_register(&codec->ac97->dev);
486 snd_printk(KERN_ERR "Can't register ac97 bus\n");
487 codec->ac97->dev.bus = NULL;
494 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
496 struct snd_soc_pcm_runtime *rtd = substream->private_data;
497 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
498 struct snd_soc_dai *codec_dai = rtd->codec_dai;
501 if (!codec_dai->driver->symmetric_rates &&
502 !cpu_dai->driver->symmetric_rates &&
503 !rtd->dai_link->symmetric_rates)
506 /* This can happen if multiple streams are starting simultaneously -
507 * the second can need to get its constraints before the first has
508 * picked a rate. Complain and allow the application to carry on.
512 "Not enforcing symmetric_rates due to race\n");
516 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
518 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
519 SNDRV_PCM_HW_PARAM_RATE,
520 rtd->rate, rtd->rate);
523 "Unable to apply rate symmetry constraint: %d\n", ret);
531 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
532 * then initialized and any private data can be allocated. This also calls
533 * startup for the cpu DAI, platform, machine and codec DAI.
535 static int soc_pcm_open(struct snd_pcm_substream *substream)
537 struct snd_soc_pcm_runtime *rtd = substream->private_data;
538 struct snd_pcm_runtime *runtime = substream->runtime;
539 struct snd_soc_platform *platform = rtd->platform;
540 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
541 struct snd_soc_dai *codec_dai = rtd->codec_dai;
542 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
543 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
546 mutex_lock(&pcm_mutex);
548 /* startup the audio subsystem */
549 if (cpu_dai->driver->ops->startup) {
550 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
552 printk(KERN_ERR "asoc: can't open interface %s\n",
558 if (platform->driver->ops->open) {
559 ret = platform->driver->ops->open(substream);
561 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
566 if (codec_dai->driver->ops->startup) {
567 ret = codec_dai->driver->ops->startup(substream, codec_dai);
569 printk(KERN_ERR "asoc: can't open codec %s\n",
575 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
576 ret = rtd->dai_link->ops->startup(substream);
578 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
583 /* Check that the codec and cpu DAIs are compatible */
584 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
585 runtime->hw.rate_min =
586 max(codec_dai_drv->playback.rate_min,
587 cpu_dai_drv->playback.rate_min);
588 runtime->hw.rate_max =
589 min(codec_dai_drv->playback.rate_max,
590 cpu_dai_drv->playback.rate_max);
591 runtime->hw.channels_min =
592 max(codec_dai_drv->playback.channels_min,
593 cpu_dai_drv->playback.channels_min);
594 runtime->hw.channels_max =
595 min(codec_dai_drv->playback.channels_max,
596 cpu_dai_drv->playback.channels_max);
597 runtime->hw.formats =
598 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
600 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
601 if (codec_dai_drv->playback.rates
602 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
603 runtime->hw.rates |= cpu_dai_drv->playback.rates;
604 if (cpu_dai_drv->playback.rates
605 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
606 runtime->hw.rates |= codec_dai_drv->playback.rates;
608 runtime->hw.rate_min =
609 max(codec_dai_drv->capture.rate_min,
610 cpu_dai_drv->capture.rate_min);
611 runtime->hw.rate_max =
612 min(codec_dai_drv->capture.rate_max,
613 cpu_dai_drv->capture.rate_max);
614 runtime->hw.channels_min =
615 max(codec_dai_drv->capture.channels_min,
616 cpu_dai_drv->capture.channels_min);
617 runtime->hw.channels_max =
618 min(codec_dai_drv->capture.channels_max,
619 cpu_dai_drv->capture.channels_max);
620 runtime->hw.formats =
621 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
623 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
624 if (codec_dai_drv->capture.rates
625 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
626 runtime->hw.rates |= cpu_dai_drv->capture.rates;
627 if (cpu_dai_drv->capture.rates
628 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
629 runtime->hw.rates |= codec_dai_drv->capture.rates;
632 snd_pcm_limit_hw_rates(runtime);
633 if (!runtime->hw.rates) {
634 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
635 codec_dai->name, cpu_dai->name);
638 if (!runtime->hw.formats) {
639 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
640 codec_dai->name, cpu_dai->name);
643 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
644 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
645 codec_dai->name, cpu_dai->name);
649 /* Symmetry only applies if we've already got an active stream. */
650 if (cpu_dai->active || codec_dai->active) {
651 ret = soc_pcm_apply_symmetry(substream);
656 pr_debug("asoc: %s <-> %s info:\n",
657 codec_dai->name, cpu_dai->name);
658 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
659 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
660 runtime->hw.channels_max);
661 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
662 runtime->hw.rate_max);
664 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
665 cpu_dai->playback_active++;
666 codec_dai->playback_active++;
668 cpu_dai->capture_active++;
669 codec_dai->capture_active++;
673 rtd->codec->active++;
674 mutex_unlock(&pcm_mutex);
678 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
679 rtd->dai_link->ops->shutdown(substream);
682 if (codec_dai->driver->ops->shutdown)
683 codec_dai->driver->ops->shutdown(substream, codec_dai);
686 if (platform->driver->ops->close)
687 platform->driver->ops->close(substream);
690 if (cpu_dai->driver->ops->shutdown)
691 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
693 mutex_unlock(&pcm_mutex);
698 * Power down the audio subsystem pmdown_time msecs after close is called.
699 * This is to ensure there are no pops or clicks in between any music tracks
700 * due to DAPM power cycling.
702 static void close_delayed_work(struct work_struct *work)
704 struct snd_soc_pcm_runtime *rtd =
705 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
706 struct snd_soc_dai *codec_dai = rtd->codec_dai;
708 mutex_lock(&pcm_mutex);
710 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
711 codec_dai->driver->playback.stream_name,
712 codec_dai->playback_active ? "active" : "inactive",
713 codec_dai->pop_wait ? "yes" : "no");
715 /* are we waiting on this codec DAI stream */
716 if (codec_dai->pop_wait == 1) {
717 codec_dai->pop_wait = 0;
718 snd_soc_dapm_stream_event(rtd,
719 codec_dai->driver->playback.stream_name,
720 SND_SOC_DAPM_STREAM_STOP);
723 mutex_unlock(&pcm_mutex);
727 * Called by ALSA when a PCM substream is closed. Private data can be
728 * freed here. The cpu DAI, codec DAI, machine and platform are also
731 static int soc_codec_close(struct snd_pcm_substream *substream)
733 struct snd_soc_pcm_runtime *rtd = substream->private_data;
734 struct snd_soc_platform *platform = rtd->platform;
735 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
736 struct snd_soc_dai *codec_dai = rtd->codec_dai;
737 struct snd_soc_codec *codec = rtd->codec;
739 mutex_lock(&pcm_mutex);
741 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
742 cpu_dai->playback_active--;
743 codec_dai->playback_active--;
745 cpu_dai->capture_active--;
746 codec_dai->capture_active--;
753 /* Muting the DAC suppresses artifacts caused during digital
754 * shutdown, for example from stopping clocks.
756 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
757 snd_soc_dai_digital_mute(codec_dai, 1);
759 if (cpu_dai->driver->ops->shutdown)
760 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
762 if (codec_dai->driver->ops->shutdown)
763 codec_dai->driver->ops->shutdown(substream, codec_dai);
765 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
766 rtd->dai_link->ops->shutdown(substream);
768 if (platform->driver->ops->close)
769 platform->driver->ops->close(substream);
770 cpu_dai->runtime = NULL;
772 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
773 /* start delayed pop wq here for playback streams */
774 codec_dai->pop_wait = 1;
775 schedule_delayed_work(&rtd->delayed_work,
776 msecs_to_jiffies(rtd->pmdown_time));
778 /* capture streams can be powered down now */
779 snd_soc_dapm_stream_event(rtd,
780 codec_dai->driver->capture.stream_name,
781 SND_SOC_DAPM_STREAM_STOP);
784 mutex_unlock(&pcm_mutex);
789 * Called by ALSA when the PCM substream is prepared, can set format, sample
790 * rate, etc. This function is non atomic and can be called multiple times,
791 * it can refer to the runtime info.
793 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
795 struct snd_soc_pcm_runtime *rtd = substream->private_data;
796 struct snd_soc_platform *platform = rtd->platform;
797 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
798 struct snd_soc_dai *codec_dai = rtd->codec_dai;
801 mutex_lock(&pcm_mutex);
803 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
804 ret = rtd->dai_link->ops->prepare(substream);
806 printk(KERN_ERR "asoc: machine prepare error\n");
811 if (platform->driver->ops->prepare) {
812 ret = platform->driver->ops->prepare(substream);
814 printk(KERN_ERR "asoc: platform prepare error\n");
819 if (codec_dai->driver->ops->prepare) {
820 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
822 printk(KERN_ERR "asoc: codec DAI prepare error\n");
827 if (cpu_dai->driver->ops->prepare) {
828 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
830 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
835 /* cancel any delayed stream shutdown that is pending */
836 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
837 codec_dai->pop_wait) {
838 codec_dai->pop_wait = 0;
839 cancel_delayed_work(&rtd->delayed_work);
842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
843 snd_soc_dapm_stream_event(rtd,
844 codec_dai->driver->playback.stream_name,
845 SND_SOC_DAPM_STREAM_START);
847 snd_soc_dapm_stream_event(rtd,
848 codec_dai->driver->capture.stream_name,
849 SND_SOC_DAPM_STREAM_START);
851 snd_soc_dai_digital_mute(codec_dai, 0);
854 mutex_unlock(&pcm_mutex);
859 * Called by ALSA when the hardware params are set by application. This
860 * function can also be called multiple times and can allocate buffers
861 * (using snd_pcm_lib_* ). It's non-atomic.
863 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
864 struct snd_pcm_hw_params *params)
866 struct snd_soc_pcm_runtime *rtd = substream->private_data;
867 struct snd_soc_platform *platform = rtd->platform;
868 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
869 struct snd_soc_dai *codec_dai = rtd->codec_dai;
872 mutex_lock(&pcm_mutex);
874 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
875 ret = rtd->dai_link->ops->hw_params(substream, params);
877 printk(KERN_ERR "asoc: machine hw_params failed\n");
882 if (codec_dai->driver->ops->hw_params) {
883 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
885 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
891 if (cpu_dai->driver->ops->hw_params) {
892 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
894 printk(KERN_ERR "asoc: interface %s hw params failed\n",
900 if (platform->driver->ops->hw_params) {
901 ret = platform->driver->ops->hw_params(substream, params);
903 printk(KERN_ERR "asoc: platform %s hw params failed\n",
909 rtd->rate = params_rate(params);
912 mutex_unlock(&pcm_mutex);
916 if (cpu_dai->driver->ops->hw_free)
917 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
920 if (codec_dai->driver->ops->hw_free)
921 codec_dai->driver->ops->hw_free(substream, codec_dai);
924 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
925 rtd->dai_link->ops->hw_free(substream);
927 mutex_unlock(&pcm_mutex);
932 * Frees resources allocated by hw_params, can be called multiple times
934 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
936 struct snd_soc_pcm_runtime *rtd = substream->private_data;
937 struct snd_soc_platform *platform = rtd->platform;
938 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
939 struct snd_soc_dai *codec_dai = rtd->codec_dai;
940 struct snd_soc_codec *codec = rtd->codec;
942 mutex_lock(&pcm_mutex);
944 /* apply codec digital mute */
946 snd_soc_dai_digital_mute(codec_dai, 1);
948 /* free any machine hw params */
949 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
950 rtd->dai_link->ops->hw_free(substream);
952 /* free any DMA resources */
953 if (platform->driver->ops->hw_free)
954 platform->driver->ops->hw_free(substream);
956 /* now free hw params for the DAIs */
957 if (codec_dai->driver->ops->hw_free)
958 codec_dai->driver->ops->hw_free(substream, codec_dai);
960 if (cpu_dai->driver->ops->hw_free)
961 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
963 mutex_unlock(&pcm_mutex);
967 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
969 struct snd_soc_pcm_runtime *rtd = substream->private_data;
970 struct snd_soc_platform *platform = rtd->platform;
971 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
972 struct snd_soc_dai *codec_dai = rtd->codec_dai;
975 if (codec_dai->driver->ops->trigger) {
976 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
981 if (platform->driver->ops->trigger) {
982 ret = platform->driver->ops->trigger(substream, cmd);
987 if (cpu_dai->driver->ops->trigger) {
988 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
996 * soc level wrapper for pointer callback
997 * If cpu_dai, codec_dai, platform driver has the delay callback, than
998 * the runtime->delay will be updated accordingly.
1000 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1002 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1003 struct snd_soc_platform *platform = rtd->platform;
1004 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1005 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1006 struct snd_pcm_runtime *runtime = substream->runtime;
1007 snd_pcm_uframes_t offset = 0;
1008 snd_pcm_sframes_t delay = 0;
1010 if (platform->driver->ops->pointer)
1011 offset = platform->driver->ops->pointer(substream);
1013 if (cpu_dai->driver->ops->delay)
1014 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1016 if (codec_dai->driver->ops->delay)
1017 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1019 if (platform->driver->delay)
1020 delay += platform->driver->delay(substream, codec_dai);
1022 runtime->delay = delay;
1027 /* ASoC PCM operations */
1028 static struct snd_pcm_ops soc_pcm_ops = {
1029 .open = soc_pcm_open,
1030 .close = soc_codec_close,
1031 .hw_params = soc_pcm_hw_params,
1032 .hw_free = soc_pcm_hw_free,
1033 .prepare = soc_pcm_prepare,
1034 .trigger = soc_pcm_trigger,
1035 .pointer = soc_pcm_pointer,
1038 #ifdef CONFIG_PM_SLEEP
1039 /* powers down audio subsystem for suspend */
1040 int snd_soc_suspend(struct device *dev)
1042 struct snd_soc_card *card = dev_get_drvdata(dev);
1043 struct snd_soc_codec *codec;
1046 /* If the initialization of this soc device failed, there is no codec
1047 * associated with it. Just bail out in this case.
1049 if (list_empty(&card->codec_dev_list))
1052 /* Due to the resume being scheduled into a workqueue we could
1053 * suspend before that's finished - wait for it to complete.
1055 snd_power_lock(card->snd_card);
1056 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1057 snd_power_unlock(card->snd_card);
1059 /* we're going to block userspace touching us until resume completes */
1060 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1062 /* mute any active DACs */
1063 for (i = 0; i < card->num_rtd; i++) {
1064 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1065 struct snd_soc_dai_driver *drv = dai->driver;
1067 if (card->rtd[i].dai_link->ignore_suspend)
1070 if (drv->ops->digital_mute && dai->playback_active)
1071 drv->ops->digital_mute(dai, 1);
1074 /* suspend all pcms */
1075 for (i = 0; i < card->num_rtd; i++) {
1076 if (card->rtd[i].dai_link->ignore_suspend)
1079 snd_pcm_suspend_all(card->rtd[i].pcm);
1082 if (card->suspend_pre)
1083 card->suspend_pre(card);
1085 for (i = 0; i < card->num_rtd; i++) {
1086 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1087 struct snd_soc_platform *platform = card->rtd[i].platform;
1089 if (card->rtd[i].dai_link->ignore_suspend)
1092 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1093 cpu_dai->driver->suspend(cpu_dai);
1094 if (platform->driver->suspend && !platform->suspended) {
1095 platform->driver->suspend(cpu_dai);
1096 platform->suspended = 1;
1100 /* close any waiting streams and save state */
1101 for (i = 0; i < card->num_rtd; i++) {
1102 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1103 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1106 for (i = 0; i < card->num_rtd; i++) {
1107 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1109 if (card->rtd[i].dai_link->ignore_suspend)
1112 if (driver->playback.stream_name != NULL)
1113 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1114 SND_SOC_DAPM_STREAM_SUSPEND);
1116 if (driver->capture.stream_name != NULL)
1117 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1118 SND_SOC_DAPM_STREAM_SUSPEND);
1121 /* suspend all CODECs */
1122 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1123 /* If there are paths active then the CODEC will be held with
1124 * bias _ON and should not be suspended. */
1125 if (!codec->suspended && codec->driver->suspend) {
1126 switch (codec->dapm.bias_level) {
1127 case SND_SOC_BIAS_STANDBY:
1128 case SND_SOC_BIAS_OFF:
1129 codec->driver->suspend(codec, PMSG_SUSPEND);
1130 codec->suspended = 1;
1133 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1139 for (i = 0; i < card->num_rtd; i++) {
1140 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1142 if (card->rtd[i].dai_link->ignore_suspend)
1145 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1146 cpu_dai->driver->suspend(cpu_dai);
1149 if (card->suspend_post)
1150 card->suspend_post(card);
1154 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1156 /* deferred resume work, so resume can complete before we finished
1157 * setting our codec back up, which can be very slow on I2C
1159 static void soc_resume_deferred(struct work_struct *work)
1161 struct snd_soc_card *card =
1162 container_of(work, struct snd_soc_card, deferred_resume_work);
1163 struct snd_soc_codec *codec;
1166 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1167 * so userspace apps are blocked from touching us
1170 dev_dbg(card->dev, "starting resume work\n");
1172 /* Bring us up into D2 so that DAPM starts enabling things */
1173 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1175 if (card->resume_pre)
1176 card->resume_pre(card);
1178 /* resume AC97 DAIs */
1179 for (i = 0; i < card->num_rtd; i++) {
1180 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1182 if (card->rtd[i].dai_link->ignore_suspend)
1185 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1186 cpu_dai->driver->resume(cpu_dai);
1189 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1190 /* If the CODEC was idle over suspend then it will have been
1191 * left with bias OFF or STANDBY and suspended so we must now
1192 * resume. Otherwise the suspend was suppressed.
1194 if (codec->driver->resume && codec->suspended) {
1195 switch (codec->dapm.bias_level) {
1196 case SND_SOC_BIAS_STANDBY:
1197 case SND_SOC_BIAS_OFF:
1198 codec->driver->resume(codec);
1199 codec->suspended = 0;
1202 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1208 for (i = 0; i < card->num_rtd; i++) {
1209 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1211 if (card->rtd[i].dai_link->ignore_suspend)
1214 if (driver->playback.stream_name != NULL)
1215 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1216 SND_SOC_DAPM_STREAM_RESUME);
1218 if (driver->capture.stream_name != NULL)
1219 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1220 SND_SOC_DAPM_STREAM_RESUME);
1223 /* unmute any active DACs */
1224 for (i = 0; i < card->num_rtd; i++) {
1225 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1226 struct snd_soc_dai_driver *drv = dai->driver;
1228 if (card->rtd[i].dai_link->ignore_suspend)
1231 if (drv->ops->digital_mute && dai->playback_active)
1232 drv->ops->digital_mute(dai, 0);
1235 for (i = 0; i < card->num_rtd; i++) {
1236 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1237 struct snd_soc_platform *platform = card->rtd[i].platform;
1239 if (card->rtd[i].dai_link->ignore_suspend)
1242 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1243 cpu_dai->driver->resume(cpu_dai);
1244 if (platform->driver->resume && platform->suspended) {
1245 platform->driver->resume(cpu_dai);
1246 platform->suspended = 0;
1250 if (card->resume_post)
1251 card->resume_post(card);
1253 dev_dbg(card->dev, "resume work completed\n");
1255 /* userspace can access us now we are back as we were before */
1256 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1259 /* powers up audio subsystem after a suspend */
1260 int snd_soc_resume(struct device *dev)
1262 struct snd_soc_card *card = dev_get_drvdata(dev);
1265 /* AC97 devices might have other drivers hanging off them so
1266 * need to resume immediately. Other drivers don't have that
1267 * problem and may take a substantial amount of time to resume
1268 * due to I/O costs and anti-pop so handle them out of line.
1270 for (i = 0; i < card->num_rtd; i++) {
1271 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1272 if (cpu_dai->driver->ac97_control) {
1273 dev_dbg(dev, "Resuming AC97 immediately\n");
1274 soc_resume_deferred(&card->deferred_resume_work);
1276 dev_dbg(dev, "Scheduling resume work\n");
1277 if (!schedule_work(&card->deferred_resume_work))
1278 dev_err(dev, "resume work item may be lost\n");
1284 EXPORT_SYMBOL_GPL(snd_soc_resume);
1286 #define snd_soc_suspend NULL
1287 #define snd_soc_resume NULL
1290 static struct snd_soc_dai_ops null_dai_ops = {
1293 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1295 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1296 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1297 struct snd_soc_codec *codec;
1298 struct snd_soc_platform *platform;
1299 struct snd_soc_dai *codec_dai, *cpu_dai;
1303 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1305 /* do we already have the CPU DAI for this link ? */
1309 /* no, then find CPU DAI from registered DAIs*/
1310 list_for_each_entry(cpu_dai, &dai_list, list) {
1311 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1313 if (!try_module_get(cpu_dai->dev->driver->owner))
1316 rtd->cpu_dai = cpu_dai;
1320 dev_dbg(card->dev, "CPU DAI %s not registered\n",
1321 dai_link->cpu_dai_name);
1324 /* do we already have the CODEC for this link ? */
1329 /* no, then find CODEC from registered CODECs*/
1330 list_for_each_entry(codec, &codec_list, list) {
1331 if (!strcmp(codec->name, dai_link->codec_name)) {
1334 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1335 list_for_each_entry(codec_dai, &dai_list, list) {
1336 if (codec->dev == codec_dai->dev &&
1337 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1338 rtd->codec_dai = codec_dai;
1342 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1343 dai_link->codec_dai_name);
1348 dev_dbg(card->dev, "CODEC %s not registered\n",
1349 dai_link->codec_name);
1352 /* do we already have the CODEC DAI for this link ? */
1353 if (rtd->platform) {
1356 /* no, then find CPU DAI from registered DAIs*/
1357 list_for_each_entry(platform, &platform_list, list) {
1358 if (!strcmp(platform->name, dai_link->platform_name)) {
1359 rtd->platform = platform;
1364 dev_dbg(card->dev, "platform %s not registered\n",
1365 dai_link->platform_name);
1369 /* mark rtd as complete if we found all 4 of our client devices */
1370 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1377 static void soc_remove_codec(struct snd_soc_codec *codec)
1381 if (codec->driver->remove) {
1382 err = codec->driver->remove(codec);
1385 "asoc: failed to remove %s: %d\n",
1389 /* Make sure all DAPM widgets are freed */
1390 snd_soc_dapm_free(&codec->dapm);
1392 soc_cleanup_codec_debugfs(codec);
1394 list_del(&codec->card_list);
1395 module_put(codec->dev->driver->owner);
1398 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1400 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1401 struct snd_soc_codec *codec = rtd->codec;
1402 struct snd_soc_platform *platform = rtd->platform;
1403 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1406 /* unregister the rtd device */
1407 if (rtd->dev_registered) {
1408 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1409 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1410 device_unregister(&rtd->dev);
1411 rtd->dev_registered = 0;
1414 /* remove the CODEC DAI */
1415 if (codec_dai && codec_dai->probed) {
1416 if (codec_dai->driver->remove) {
1417 err = codec_dai->driver->remove(codec_dai);
1419 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1421 codec_dai->probed = 0;
1422 list_del(&codec_dai->card_list);
1425 /* remove the platform */
1426 if (platform && platform->probed) {
1427 if (platform->driver->remove) {
1428 err = platform->driver->remove(platform);
1430 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1432 platform->probed = 0;
1433 list_del(&platform->card_list);
1434 module_put(platform->dev->driver->owner);
1437 /* remove the CODEC */
1438 if (codec && codec->probed)
1439 soc_remove_codec(codec);
1441 /* remove the cpu_dai */
1442 if (cpu_dai && cpu_dai->probed) {
1443 if (cpu_dai->driver->remove) {
1444 err = cpu_dai->driver->remove(cpu_dai);
1446 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1448 cpu_dai->probed = 0;
1449 list_del(&cpu_dai->card_list);
1450 module_put(cpu_dai->dev->driver->owner);
1454 static void soc_set_name_prefix(struct snd_soc_card *card,
1455 struct snd_soc_codec *codec)
1459 if (card->codec_conf == NULL)
1462 for (i = 0; i < card->num_configs; i++) {
1463 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1464 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1465 codec->name_prefix = map->name_prefix;
1471 static int soc_probe_codec(struct snd_soc_card *card,
1472 struct snd_soc_codec *codec)
1475 const struct snd_soc_codec_driver *driver = codec->driver;
1478 codec->dapm.card = card;
1479 soc_set_name_prefix(card, codec);
1481 if (!try_module_get(codec->dev->driver->owner))
1484 if (driver->probe) {
1485 ret = driver->probe(codec);
1488 "asoc: failed to probe CODEC %s: %d\n",
1494 if (driver->dapm_widgets)
1495 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1496 driver->num_dapm_widgets);
1497 if (driver->dapm_routes)
1498 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1499 driver->num_dapm_routes);
1501 soc_init_codec_debugfs(codec);
1503 /* mark codec as probed and add to card codec list */
1505 list_add(&codec->card_list, &card->codec_dev_list);
1506 list_add(&codec->dapm.list, &card->dapm_list);
1511 module_put(codec->dev->driver->owner);
1516 static void rtd_release(struct device *dev) {}
1518 static int soc_post_component_init(struct snd_soc_card *card,
1519 struct snd_soc_codec *codec,
1520 int num, int dailess)
1522 struct snd_soc_dai_link *dai_link = NULL;
1523 struct snd_soc_aux_dev *aux_dev = NULL;
1524 struct snd_soc_pcm_runtime *rtd;
1525 const char *temp, *name;
1529 dai_link = &card->dai_link[num];
1530 rtd = &card->rtd[num];
1531 name = dai_link->name;
1533 aux_dev = &card->aux_dev[num];
1534 rtd = &card->rtd_aux[num];
1535 name = aux_dev->name;
1539 /* machine controls, routes and widgets are not prefixed */
1540 temp = codec->name_prefix;
1541 codec->name_prefix = NULL;
1543 /* do machine specific initialization */
1544 if (!dailess && dai_link->init)
1545 ret = dai_link->init(rtd);
1546 else if (dailess && aux_dev->init)
1547 ret = aux_dev->init(&codec->dapm);
1549 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1552 codec->name_prefix = temp;
1554 /* Make sure all DAPM widgets are instantiated */
1555 snd_soc_dapm_new_widgets(&codec->dapm);
1557 /* register the rtd device */
1559 rtd->dev.parent = card->dev;
1560 rtd->dev.release = rtd_release;
1561 rtd->dev.init_name = name;
1562 ret = device_register(&rtd->dev);
1565 "asoc: failed to register runtime device: %d\n", ret);
1568 rtd->dev_registered = 1;
1570 /* add DAPM sysfs entries for this codec */
1571 ret = snd_soc_dapm_sys_add(&rtd->dev);
1574 "asoc: failed to add codec dapm sysfs entries: %d\n",
1577 /* add codec sysfs entries */
1578 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1581 "asoc: failed to add codec sysfs files: %d\n", ret);
1586 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1588 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1589 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1590 struct snd_soc_codec *codec = rtd->codec;
1591 struct snd_soc_platform *platform = rtd->platform;
1592 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1595 dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1597 /* config components */
1598 codec_dai->codec = codec;
1599 cpu_dai->platform = platform;
1600 codec_dai->card = card;
1601 cpu_dai->card = card;
1603 /* set default power off timeout */
1604 rtd->pmdown_time = pmdown_time;
1606 /* probe the cpu_dai */
1607 if (!cpu_dai->probed) {
1608 if (cpu_dai->driver->probe) {
1609 ret = cpu_dai->driver->probe(cpu_dai);
1611 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1616 cpu_dai->probed = 1;
1617 /* mark cpu_dai as probed and add to card cpu_dai list */
1618 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1621 /* probe the CODEC */
1622 if (!codec->probed) {
1623 ret = soc_probe_codec(card, codec);
1628 /* probe the platform */
1629 if (!platform->probed) {
1630 if (!try_module_get(platform->dev->driver->owner))
1633 if (platform->driver->probe) {
1634 ret = platform->driver->probe(platform);
1636 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1638 module_put(platform->dev->driver->owner);
1642 /* mark platform as probed and add to card platform list */
1643 platform->probed = 1;
1644 list_add(&platform->card_list, &card->platform_dev_list);
1647 /* probe the CODEC DAI */
1648 if (!codec_dai->probed) {
1649 if (codec_dai->driver->probe) {
1650 ret = codec_dai->driver->probe(codec_dai);
1652 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1658 /* mark cpu_dai as probed and add to card cpu_dai list */
1659 codec_dai->probed = 1;
1660 list_add(&codec_dai->card_list, &card->dai_dev_list);
1663 /* DAPM dai link stream work */
1664 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1666 ret = soc_post_component_init(card, codec, num, 0);
1670 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1672 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1674 /* create the pcm */
1675 ret = soc_new_pcm(rtd, num);
1677 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1681 /* add platform data for AC97 devices */
1682 if (rtd->codec_dai->driver->ac97_control)
1683 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1688 #ifdef CONFIG_SND_SOC_AC97_BUS
1689 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1693 /* Only instantiate AC97 if not already done by the adaptor
1694 * for the generic AC97 subsystem.
1696 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1698 * It is possible that the AC97 device is already registered to
1699 * the device subsystem. This happens when the device is created
1700 * via snd_ac97_mixer(). Currently only SoC codec that does so
1701 * is the generic AC97 glue but others migh emerge.
1703 * In those cases we don't try to register the device again.
1705 if (!rtd->codec->ac97_created)
1708 ret = soc_ac97_dev_register(rtd->codec);
1710 printk(KERN_ERR "asoc: AC97 device register failed\n");
1714 rtd->codec->ac97_registered = 1;
1719 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1721 if (codec->ac97_registered) {
1722 soc_ac97_dev_unregister(codec);
1723 codec->ac97_registered = 0;
1728 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1730 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1731 struct snd_soc_codec *codec;
1734 /* find CODEC from registered CODECs*/
1735 list_for_each_entry(codec, &codec_list, list) {
1736 if (!strcmp(codec->name, aux_dev->codec_name)) {
1737 if (codec->probed) {
1739 "asoc: codec already probed");
1746 /* codec not found */
1747 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1751 ret = soc_probe_codec(card, codec);
1755 ret = soc_post_component_init(card, codec, num, 1);
1761 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1763 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1764 struct snd_soc_codec *codec = rtd->codec;
1766 /* unregister the rtd device */
1767 if (rtd->dev_registered) {
1768 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1769 device_unregister(&rtd->dev);
1770 rtd->dev_registered = 0;
1773 if (codec && codec->probed)
1774 soc_remove_codec(codec);
1777 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1778 enum snd_soc_compress_type compress_type)
1782 if (codec->cache_init)
1785 /* override the compress_type if necessary */
1786 if (compress_type && codec->compress_type != compress_type)
1787 codec->compress_type = compress_type;
1788 ret = snd_soc_cache_init(codec);
1790 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1794 codec->cache_init = 1;
1798 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1800 struct snd_soc_codec *codec;
1801 struct snd_soc_codec_conf *codec_conf;
1802 enum snd_soc_compress_type compress_type;
1805 mutex_lock(&card->mutex);
1807 if (card->instantiated) {
1808 mutex_unlock(&card->mutex);
1813 for (i = 0; i < card->num_links; i++)
1814 soc_bind_dai_link(card, i);
1816 /* bind completed ? */
1817 if (card->num_rtd != card->num_links) {
1818 mutex_unlock(&card->mutex);
1822 /* initialize the register cache for each available codec */
1823 list_for_each_entry(codec, &codec_list, list) {
1824 if (codec->cache_init)
1826 /* by default we don't override the compress_type */
1828 /* check to see if we need to override the compress_type */
1829 for (i = 0; i < card->num_configs; ++i) {
1830 codec_conf = &card->codec_conf[i];
1831 if (!strcmp(codec->name, codec_conf->dev_name)) {
1832 compress_type = codec_conf->compress_type;
1833 if (compress_type && compress_type
1834 != codec->compress_type)
1838 ret = snd_soc_init_codec_cache(codec, compress_type);
1840 mutex_unlock(&card->mutex);
1845 /* card bind complete so register a sound card */
1846 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1847 card->owner, 0, &card->snd_card);
1849 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1851 mutex_unlock(&card->mutex);
1854 card->snd_card->dev = card->dev;
1856 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1857 card->dapm.dev = card->dev;
1858 card->dapm.card = card;
1859 list_add(&card->dapm.list, &card->dapm_list);
1861 #ifdef CONFIG_PM_SLEEP
1862 /* deferred resume work */
1863 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1866 /* initialise the sound card only once */
1868 ret = card->probe(card);
1870 goto card_probe_error;
1873 for (i = 0; i < card->num_links; i++) {
1874 ret = soc_probe_dai_link(card, i);
1876 pr_err("asoc: failed to instantiate card %s: %d\n",
1882 for (i = 0; i < card->num_aux_devs; i++) {
1883 ret = soc_probe_aux_dev(card, i);
1885 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1887 goto probe_aux_dev_err;
1891 if (card->dapm_widgets)
1892 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1893 card->num_dapm_widgets);
1894 if (card->dapm_routes)
1895 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1896 card->num_dapm_routes);
1898 #ifdef CONFIG_DEBUG_FS
1899 card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
1900 card->debugfs_card_root);
1901 if (!card->dapm.debugfs_dapm)
1903 "Failed to create card DAPM debugfs directory\n");
1905 snd_soc_dapm_debugfs_init(&card->dapm);
1908 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1910 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1913 if (card->late_probe) {
1914 ret = card->late_probe(card);
1916 dev_err(card->dev, "%s late_probe() failed: %d\n",
1918 goto probe_aux_dev_err;
1922 ret = snd_card_register(card->snd_card);
1924 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1925 goto probe_aux_dev_err;
1928 #ifdef CONFIG_SND_SOC_AC97_BUS
1929 /* register any AC97 codecs */
1930 for (i = 0; i < card->num_rtd; i++) {
1931 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1933 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1935 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1936 goto probe_aux_dev_err;
1941 card->instantiated = 1;
1942 mutex_unlock(&card->mutex);
1946 for (i = 0; i < card->num_aux_devs; i++)
1947 soc_remove_aux_dev(card, i);
1950 for (i = 0; i < card->num_links; i++)
1951 soc_remove_dai_link(card, i);
1957 snd_card_free(card->snd_card);
1959 mutex_unlock(&card->mutex);
1963 * Attempt to initialise any uninitialised cards. Must be called with
1966 static void snd_soc_instantiate_cards(void)
1968 struct snd_soc_card *card;
1969 list_for_each_entry(card, &card_list, list)
1970 snd_soc_instantiate_card(card);
1973 /* probes a new socdev */
1974 static int soc_probe(struct platform_device *pdev)
1976 struct snd_soc_card *card = platform_get_drvdata(pdev);
1980 * no card, so machine driver should be registering card
1981 * we should not be here in that case so ret error
1986 /* Bodge while we unpick instantiation */
1987 card->dev = &pdev->dev;
1989 ret = snd_soc_register_card(card);
1991 dev_err(&pdev->dev, "Failed to register card\n");
1998 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2002 /* make sure any delayed work runs */
2003 for (i = 0; i < card->num_rtd; i++) {
2004 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2005 flush_delayed_work_sync(&rtd->delayed_work);
2008 /* remove auxiliary devices */
2009 for (i = 0; i < card->num_aux_devs; i++)
2010 soc_remove_aux_dev(card, i);
2012 /* remove and free each DAI */
2013 for (i = 0; i < card->num_rtd; i++)
2014 soc_remove_dai_link(card, i);
2016 soc_cleanup_card_debugfs(card);
2018 /* remove the card */
2023 snd_card_free(card->snd_card);
2028 /* removes a socdev */
2029 static int soc_remove(struct platform_device *pdev)
2031 struct snd_soc_card *card = platform_get_drvdata(pdev);
2033 snd_soc_unregister_card(card);
2037 int snd_soc_poweroff(struct device *dev)
2039 struct snd_soc_card *card = dev_get_drvdata(dev);
2042 if (!card->instantiated)
2045 /* Flush out pmdown_time work - we actually do want to run it
2046 * now, we're shutting down so no imminent restart. */
2047 for (i = 0; i < card->num_rtd; i++) {
2048 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2049 flush_delayed_work_sync(&rtd->delayed_work);
2052 snd_soc_dapm_shutdown(card);
2056 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2058 const struct dev_pm_ops snd_soc_pm_ops = {
2059 .suspend = snd_soc_suspend,
2060 .resume = snd_soc_resume,
2061 .poweroff = snd_soc_poweroff,
2064 /* ASoC platform driver */
2065 static struct platform_driver soc_driver = {
2067 .name = "soc-audio",
2068 .owner = THIS_MODULE,
2069 .pm = &snd_soc_pm_ops,
2072 .remove = soc_remove,
2075 /* create a new pcm */
2076 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2078 struct snd_soc_codec *codec = rtd->codec;
2079 struct snd_soc_platform *platform = rtd->platform;
2080 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2081 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2082 struct snd_pcm *pcm;
2084 int ret = 0, playback = 0, capture = 0;
2086 /* check client and interface hw capabilities */
2087 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2088 rtd->dai_link->stream_name, codec_dai->name, num);
2090 if (codec_dai->driver->playback.channels_min)
2092 if (codec_dai->driver->capture.channels_min)
2095 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2096 ret = snd_pcm_new(rtd->card->snd_card, new_name,
2097 num, playback, capture, &pcm);
2099 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2104 pcm->private_data = rtd;
2105 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2106 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2107 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2108 soc_pcm_ops.copy = platform->driver->ops->copy;
2109 soc_pcm_ops.silence = platform->driver->ops->silence;
2110 soc_pcm_ops.ack = platform->driver->ops->ack;
2111 soc_pcm_ops.page = platform->driver->ops->page;
2114 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2117 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2119 ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2121 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2125 pcm->private_free = platform->driver->pcm_free;
2126 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2132 * snd_soc_codec_volatile_register: Report if a register is volatile.
2134 * @codec: CODEC to query.
2135 * @reg: Register to query.
2137 * Boolean function indiciating if a CODEC register is volatile.
2139 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2142 if (codec->volatile_register)
2143 return codec->volatile_register(codec, reg);
2147 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2150 * snd_soc_new_ac97_codec - initailise AC97 device
2151 * @codec: audio codec
2152 * @ops: AC97 bus operations
2153 * @num: AC97 codec number
2155 * Initialises AC97 codec resources for use by ad-hoc devices only.
2157 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2158 struct snd_ac97_bus_ops *ops, int num)
2160 mutex_lock(&codec->mutex);
2162 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2163 if (codec->ac97 == NULL) {
2164 mutex_unlock(&codec->mutex);
2168 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2169 if (codec->ac97->bus == NULL) {
2172 mutex_unlock(&codec->mutex);
2176 codec->ac97->bus->ops = ops;
2177 codec->ac97->num = num;
2180 * Mark the AC97 device to be created by us. This way we ensure that the
2181 * device will be registered with the device subsystem later on.
2183 codec->ac97_created = 1;
2185 mutex_unlock(&codec->mutex);
2188 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2191 * snd_soc_free_ac97_codec - free AC97 codec device
2192 * @codec: audio codec
2194 * Frees AC97 codec device resources.
2196 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2198 mutex_lock(&codec->mutex);
2199 #ifdef CONFIG_SND_SOC_AC97_BUS
2200 soc_unregister_ac97_dai_link(codec);
2202 kfree(codec->ac97->bus);
2205 codec->ac97_created = 0;
2206 mutex_unlock(&codec->mutex);
2208 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2210 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2214 ret = codec->read(codec, reg);
2215 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2216 trace_snd_soc_reg_read(codec, reg, ret);
2220 EXPORT_SYMBOL_GPL(snd_soc_read);
2222 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2223 unsigned int reg, unsigned int val)
2225 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2226 trace_snd_soc_reg_write(codec, reg, val);
2227 return codec->write(codec, reg, val);
2229 EXPORT_SYMBOL_GPL(snd_soc_write);
2231 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2232 unsigned int reg, const void *data, size_t len)
2234 return codec->bulk_write_raw(codec, reg, data, len);
2236 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2239 * snd_soc_update_bits - update codec register bits
2240 * @codec: audio codec
2241 * @reg: codec register
2242 * @mask: register mask
2245 * Writes new register value.
2247 * Returns 1 for change, 0 for no change, or negative error code.
2249 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2250 unsigned int mask, unsigned int value)
2253 unsigned int old, new;
2256 ret = snd_soc_read(codec, reg);
2261 new = (old & ~mask) | value;
2262 change = old != new;
2264 ret = snd_soc_write(codec, reg, new);
2271 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2274 * snd_soc_update_bits_locked - update codec register bits
2275 * @codec: audio codec
2276 * @reg: codec register
2277 * @mask: register mask
2280 * Writes new register value, and takes the codec mutex.
2282 * Returns 1 for change else 0.
2284 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2285 unsigned short reg, unsigned int mask,
2290 mutex_lock(&codec->mutex);
2291 change = snd_soc_update_bits(codec, reg, mask, value);
2292 mutex_unlock(&codec->mutex);
2296 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2299 * snd_soc_test_bits - test register for change
2300 * @codec: audio codec
2301 * @reg: codec register
2302 * @mask: register mask
2305 * Tests a register with a new value and checks if the new value is
2306 * different from the old value.
2308 * Returns 1 for change else 0.
2310 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2311 unsigned int mask, unsigned int value)
2314 unsigned int old, new;
2316 old = snd_soc_read(codec, reg);
2317 new = (old & ~mask) | value;
2318 change = old != new;
2322 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2325 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2326 * @substream: the pcm substream
2327 * @hw: the hardware parameters
2329 * Sets the substream runtime hardware parameters.
2331 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2332 const struct snd_pcm_hardware *hw)
2334 struct snd_pcm_runtime *runtime = substream->runtime;
2335 runtime->hw.info = hw->info;
2336 runtime->hw.formats = hw->formats;
2337 runtime->hw.period_bytes_min = hw->period_bytes_min;
2338 runtime->hw.period_bytes_max = hw->period_bytes_max;
2339 runtime->hw.periods_min = hw->periods_min;
2340 runtime->hw.periods_max = hw->periods_max;
2341 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2342 runtime->hw.fifo_size = hw->fifo_size;
2345 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2348 * snd_soc_cnew - create new control
2349 * @_template: control template
2350 * @data: control private data
2351 * @long_name: control long name
2352 * @prefix: control name prefix
2354 * Create a new mixer control from a template control.
2356 * Returns 0 for success, else error.
2358 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2359 void *data, char *long_name,
2362 struct snd_kcontrol_new template;
2363 struct snd_kcontrol *kcontrol;
2367 memcpy(&template, _template, sizeof(template));
2371 long_name = template.name;
2374 name_len = strlen(long_name) + strlen(prefix) + 2;
2375 name = kmalloc(name_len, GFP_ATOMIC);
2379 snprintf(name, name_len, "%s %s", prefix, long_name);
2381 template.name = name;
2383 template.name = long_name;
2386 kcontrol = snd_ctl_new1(&template, data);
2392 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2395 * snd_soc_add_controls - add an array of controls to a codec.
2396 * Convienience function to add a list of controls. Many codecs were
2397 * duplicating this code.
2399 * @codec: codec to add controls to
2400 * @controls: array of controls to add
2401 * @num_controls: number of elements in the array
2403 * Return 0 for success, else error.
2405 int snd_soc_add_controls(struct snd_soc_codec *codec,
2406 const struct snd_kcontrol_new *controls, int num_controls)
2408 struct snd_card *card = codec->card->snd_card;
2411 for (i = 0; i < num_controls; i++) {
2412 const struct snd_kcontrol_new *control = &controls[i];
2413 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2415 codec->name_prefix));
2417 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2418 codec->name, control->name, err);
2425 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2428 * snd_soc_info_enum_double - enumerated double mixer info callback
2429 * @kcontrol: mixer control
2430 * @uinfo: control element information
2432 * Callback to provide information about a double enumerated
2435 * Returns 0 for success.
2437 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2438 struct snd_ctl_elem_info *uinfo)
2440 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2442 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2443 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2444 uinfo->value.enumerated.items = e->max;
2446 if (uinfo->value.enumerated.item > e->max - 1)
2447 uinfo->value.enumerated.item = e->max - 1;
2448 strcpy(uinfo->value.enumerated.name,
2449 e->texts[uinfo->value.enumerated.item]);
2452 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2455 * snd_soc_get_enum_double - enumerated double mixer get callback
2456 * @kcontrol: mixer control
2457 * @ucontrol: control element information
2459 * Callback to get the value of a double enumerated mixer.
2461 * Returns 0 for success.
2463 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2464 struct snd_ctl_elem_value *ucontrol)
2466 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2467 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2468 unsigned int val, bitmask;
2470 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2472 val = snd_soc_read(codec, e->reg);
2473 ucontrol->value.enumerated.item[0]
2474 = (val >> e->shift_l) & (bitmask - 1);
2475 if (e->shift_l != e->shift_r)
2476 ucontrol->value.enumerated.item[1] =
2477 (val >> e->shift_r) & (bitmask - 1);
2481 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2484 * snd_soc_put_enum_double - enumerated double mixer put callback
2485 * @kcontrol: mixer control
2486 * @ucontrol: control element information
2488 * Callback to set the value of a double enumerated mixer.
2490 * Returns 0 for success.
2492 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2493 struct snd_ctl_elem_value *ucontrol)
2495 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2496 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2498 unsigned int mask, bitmask;
2500 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2502 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2504 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2505 mask = (bitmask - 1) << e->shift_l;
2506 if (e->shift_l != e->shift_r) {
2507 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2509 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2510 mask |= (bitmask - 1) << e->shift_r;
2513 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2515 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2518 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2519 * @kcontrol: mixer control
2520 * @ucontrol: control element information
2522 * Callback to get the value of a double semi enumerated mixer.
2524 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2525 * used for handling bitfield coded enumeration for example.
2527 * Returns 0 for success.
2529 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2530 struct snd_ctl_elem_value *ucontrol)
2532 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2533 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2534 unsigned int reg_val, val, mux;
2536 reg_val = snd_soc_read(codec, e->reg);
2537 val = (reg_val >> e->shift_l) & e->mask;
2538 for (mux = 0; mux < e->max; mux++) {
2539 if (val == e->values[mux])
2542 ucontrol->value.enumerated.item[0] = mux;
2543 if (e->shift_l != e->shift_r) {
2544 val = (reg_val >> e->shift_r) & e->mask;
2545 for (mux = 0; mux < e->max; mux++) {
2546 if (val == e->values[mux])
2549 ucontrol->value.enumerated.item[1] = mux;
2554 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2557 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2558 * @kcontrol: mixer control
2559 * @ucontrol: control element information
2561 * Callback to set the value of a double semi enumerated mixer.
2563 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2564 * used for handling bitfield coded enumeration for example.
2566 * Returns 0 for success.
2568 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2569 struct snd_ctl_elem_value *ucontrol)
2571 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2572 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2576 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2578 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2579 mask = e->mask << e->shift_l;
2580 if (e->shift_l != e->shift_r) {
2581 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2583 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2584 mask |= e->mask << e->shift_r;
2587 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2589 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2592 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2593 * @kcontrol: mixer control
2594 * @uinfo: control element information
2596 * Callback to provide information about an external enumerated
2599 * Returns 0 for success.
2601 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2602 struct snd_ctl_elem_info *uinfo)
2604 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2606 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2608 uinfo->value.enumerated.items = e->max;
2610 if (uinfo->value.enumerated.item > e->max - 1)
2611 uinfo->value.enumerated.item = e->max - 1;
2612 strcpy(uinfo->value.enumerated.name,
2613 e->texts[uinfo->value.enumerated.item]);
2616 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2619 * snd_soc_info_volsw_ext - external single mixer info callback
2620 * @kcontrol: mixer control
2621 * @uinfo: control element information
2623 * Callback to provide information about a single external mixer control.
2625 * Returns 0 for success.
2627 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2628 struct snd_ctl_elem_info *uinfo)
2630 int max = kcontrol->private_value;
2632 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2633 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2635 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2638 uinfo->value.integer.min = 0;
2639 uinfo->value.integer.max = max;
2642 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2645 * snd_soc_info_volsw - single mixer info callback
2646 * @kcontrol: mixer control
2647 * @uinfo: control element information
2649 * Callback to provide information about a single mixer control.
2651 * Returns 0 for success.
2653 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2654 struct snd_ctl_elem_info *uinfo)
2656 struct soc_mixer_control *mc =
2657 (struct soc_mixer_control *)kcontrol->private_value;
2659 unsigned int shift = mc->shift;
2660 unsigned int rshift = mc->rshift;
2662 if (!mc->platform_max)
2663 mc->platform_max = mc->max;
2664 platform_max = mc->platform_max;
2666 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2667 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2669 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2671 uinfo->count = shift == rshift ? 1 : 2;
2672 uinfo->value.integer.min = 0;
2673 uinfo->value.integer.max = platform_max;
2676 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2679 * snd_soc_get_volsw - single mixer get callback
2680 * @kcontrol: mixer control
2681 * @ucontrol: control element information
2683 * Callback to get the value of a single mixer control.
2685 * Returns 0 for success.
2687 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2688 struct snd_ctl_elem_value *ucontrol)
2690 struct soc_mixer_control *mc =
2691 (struct soc_mixer_control *)kcontrol->private_value;
2692 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2693 unsigned int reg = mc->reg;
2694 unsigned int shift = mc->shift;
2695 unsigned int rshift = mc->rshift;
2697 unsigned int mask = (1 << fls(max)) - 1;
2698 unsigned int invert = mc->invert;
2700 ucontrol->value.integer.value[0] =
2701 (snd_soc_read(codec, reg) >> shift) & mask;
2702 if (shift != rshift)
2703 ucontrol->value.integer.value[1] =
2704 (snd_soc_read(codec, reg) >> rshift) & mask;
2706 ucontrol->value.integer.value[0] =
2707 max - ucontrol->value.integer.value[0];
2708 if (shift != rshift)
2709 ucontrol->value.integer.value[1] =
2710 max - ucontrol->value.integer.value[1];
2715 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2718 * snd_soc_put_volsw - single mixer put callback
2719 * @kcontrol: mixer control
2720 * @ucontrol: control element information
2722 * Callback to set the value of a single mixer control.
2724 * Returns 0 for success.
2726 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2727 struct snd_ctl_elem_value *ucontrol)
2729 struct soc_mixer_control *mc =
2730 (struct soc_mixer_control *)kcontrol->private_value;
2731 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2732 unsigned int reg = mc->reg;
2733 unsigned int shift = mc->shift;
2734 unsigned int rshift = mc->rshift;
2736 unsigned int mask = (1 << fls(max)) - 1;
2737 unsigned int invert = mc->invert;
2738 unsigned int val, val2, val_mask;
2740 val = (ucontrol->value.integer.value[0] & mask);
2743 val_mask = mask << shift;
2745 if (shift != rshift) {
2746 val2 = (ucontrol->value.integer.value[1] & mask);
2749 val_mask |= mask << rshift;
2750 val |= val2 << rshift;
2752 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2754 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2757 * snd_soc_info_volsw_2r - double mixer info callback
2758 * @kcontrol: mixer control
2759 * @uinfo: control element information
2761 * Callback to provide information about a double mixer control that
2762 * spans 2 codec registers.
2764 * Returns 0 for success.
2766 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2767 struct snd_ctl_elem_info *uinfo)
2769 struct soc_mixer_control *mc =
2770 (struct soc_mixer_control *)kcontrol->private_value;
2773 if (!mc->platform_max)
2774 mc->platform_max = mc->max;
2775 platform_max = mc->platform_max;
2777 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2778 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2780 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2783 uinfo->value.integer.min = 0;
2784 uinfo->value.integer.max = platform_max;
2787 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2790 * snd_soc_get_volsw_2r - double mixer get callback
2791 * @kcontrol: mixer control
2792 * @ucontrol: control element information
2794 * Callback to get the value of a double mixer control that spans 2 registers.
2796 * Returns 0 for success.
2798 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2799 struct snd_ctl_elem_value *ucontrol)
2801 struct soc_mixer_control *mc =
2802 (struct soc_mixer_control *)kcontrol->private_value;
2803 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2804 unsigned int reg = mc->reg;
2805 unsigned int reg2 = mc->rreg;
2806 unsigned int shift = mc->shift;
2808 unsigned int mask = (1 << fls(max)) - 1;
2809 unsigned int invert = mc->invert;
2811 ucontrol->value.integer.value[0] =
2812 (snd_soc_read(codec, reg) >> shift) & mask;
2813 ucontrol->value.integer.value[1] =
2814 (snd_soc_read(codec, reg2) >> shift) & mask;
2816 ucontrol->value.integer.value[0] =
2817 max - ucontrol->value.integer.value[0];
2818 ucontrol->value.integer.value[1] =
2819 max - ucontrol->value.integer.value[1];
2824 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2827 * snd_soc_put_volsw_2r - double mixer set callback
2828 * @kcontrol: mixer control
2829 * @ucontrol: control element information
2831 * Callback to set the value of a double mixer control that spans 2 registers.
2833 * Returns 0 for success.
2835 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2836 struct snd_ctl_elem_value *ucontrol)
2838 struct soc_mixer_control *mc =
2839 (struct soc_mixer_control *)kcontrol->private_value;
2840 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2841 unsigned int reg = mc->reg;
2842 unsigned int reg2 = mc->rreg;
2843 unsigned int shift = mc->shift;
2845 unsigned int mask = (1 << fls(max)) - 1;
2846 unsigned int invert = mc->invert;
2848 unsigned int val, val2, val_mask;
2850 val_mask = mask << shift;
2851 val = (ucontrol->value.integer.value[0] & mask);
2852 val2 = (ucontrol->value.integer.value[1] & mask);
2860 val2 = val2 << shift;
2862 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2866 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2869 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2872 * snd_soc_info_volsw_s8 - signed mixer info callback
2873 * @kcontrol: mixer control
2874 * @uinfo: control element information
2876 * Callback to provide information about a signed mixer control.
2878 * Returns 0 for success.
2880 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2881 struct snd_ctl_elem_info *uinfo)
2883 struct soc_mixer_control *mc =
2884 (struct soc_mixer_control *)kcontrol->private_value;
2888 if (!mc->platform_max)
2889 mc->platform_max = mc->max;
2890 platform_max = mc->platform_max;
2892 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2894 uinfo->value.integer.min = 0;
2895 uinfo->value.integer.max = platform_max - min;
2898 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2901 * snd_soc_get_volsw_s8 - signed mixer get callback
2902 * @kcontrol: mixer control
2903 * @ucontrol: control element information
2905 * Callback to get the value of a signed mixer control.
2907 * Returns 0 for success.
2909 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2910 struct snd_ctl_elem_value *ucontrol)
2912 struct soc_mixer_control *mc =
2913 (struct soc_mixer_control *)kcontrol->private_value;
2914 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2915 unsigned int reg = mc->reg;
2917 int val = snd_soc_read(codec, reg);
2919 ucontrol->value.integer.value[0] =
2920 ((signed char)(val & 0xff))-min;
2921 ucontrol->value.integer.value[1] =
2922 ((signed char)((val >> 8) & 0xff))-min;
2925 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2928 * snd_soc_put_volsw_sgn - signed mixer put callback
2929 * @kcontrol: mixer control
2930 * @ucontrol: control element information
2932 * Callback to set the value of a signed mixer control.
2934 * Returns 0 for success.
2936 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2937 struct snd_ctl_elem_value *ucontrol)
2939 struct soc_mixer_control *mc =
2940 (struct soc_mixer_control *)kcontrol->private_value;
2941 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2942 unsigned int reg = mc->reg;
2946 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2947 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2949 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2951 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2954 * snd_soc_limit_volume - Set new limit to an existing volume control.
2956 * @codec: where to look for the control
2957 * @name: Name of the control
2958 * @max: new maximum limit
2960 * Return 0 for success, else error.
2962 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2963 const char *name, int max)
2965 struct snd_card *card = codec->card->snd_card;
2966 struct snd_kcontrol *kctl;
2967 struct soc_mixer_control *mc;
2971 /* Sanity check for name and max */
2972 if (unlikely(!name || max <= 0))
2975 list_for_each_entry(kctl, &card->controls, list) {
2976 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2982 mc = (struct soc_mixer_control *)kctl->private_value;
2983 if (max <= mc->max) {
2984 mc->platform_max = max;
2990 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2993 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2994 * mixer info callback
2995 * @kcontrol: mixer control
2996 * @uinfo: control element information
2998 * Returns 0 for success.
3000 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3001 struct snd_ctl_elem_info *uinfo)
3003 struct soc_mixer_control *mc =
3004 (struct soc_mixer_control *)kcontrol->private_value;
3008 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3010 uinfo->value.integer.min = 0;
3011 uinfo->value.integer.max = max-min;
3015 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3018 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3019 * mixer get callback
3020 * @kcontrol: mixer control
3021 * @uinfo: control element information
3023 * Returns 0 for success.
3025 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3026 struct snd_ctl_elem_value *ucontrol)
3028 struct soc_mixer_control *mc =
3029 (struct soc_mixer_control *)kcontrol->private_value;
3030 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3031 unsigned int mask = (1<<mc->shift)-1;
3033 int val = snd_soc_read(codec, mc->reg) & mask;
3034 int valr = snd_soc_read(codec, mc->rreg) & mask;
3036 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3037 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3040 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3043 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3044 * mixer put callback
3045 * @kcontrol: mixer control
3046 * @uinfo: control element information
3048 * Returns 0 for success.
3050 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3051 struct snd_ctl_elem_value *ucontrol)
3053 struct soc_mixer_control *mc =
3054 (struct soc_mixer_control *)kcontrol->private_value;
3055 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3056 unsigned int mask = (1<<mc->shift)-1;
3059 unsigned int val, valr, oval, ovalr;
3061 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3063 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3066 oval = snd_soc_read(codec, mc->reg) & mask;
3067 ovalr = snd_soc_read(codec, mc->rreg) & mask;
3071 ret = snd_soc_write(codec, mc->reg, val);
3075 if (ovalr != valr) {
3076 ret = snd_soc_write(codec, mc->rreg, valr);
3083 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3086 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3088 * @clk_id: DAI specific clock ID
3089 * @freq: new clock frequency in Hz
3090 * @dir: new clock direction - input/output.
3092 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3094 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3095 unsigned int freq, int dir)
3097 if (dai->driver && dai->driver->ops->set_sysclk)
3098 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3099 else if (dai->codec && dai->codec->driver->set_sysclk)
3100 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3105 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3108 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3110 * @clk_id: DAI specific clock ID
3111 * @freq: new clock frequency in Hz
3112 * @dir: new clock direction - input/output.
3114 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3116 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3117 unsigned int freq, int dir)
3119 if (codec->driver->set_sysclk)
3120 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3124 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3127 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3129 * @div_id: DAI specific clock divider ID
3130 * @div: new clock divisor.
3132 * Configures the clock dividers. This is used to derive the best DAI bit and
3133 * frame clocks from the system or master clock. It's best to set the DAI bit
3134 * and frame clocks as low as possible to save system power.
3136 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3137 int div_id, int div)
3139 if (dai->driver && dai->driver->ops->set_clkdiv)
3140 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3144 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3147 * snd_soc_dai_set_pll - configure DAI PLL.
3149 * @pll_id: DAI specific PLL ID
3150 * @source: DAI specific source for the PLL
3151 * @freq_in: PLL input clock frequency in Hz
3152 * @freq_out: requested PLL output clock frequency in Hz
3154 * Configures and enables PLL to generate output clock based on input clock.
3156 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3157 unsigned int freq_in, unsigned int freq_out)
3159 if (dai->driver && dai->driver->ops->set_pll)
3160 return dai->driver->ops->set_pll(dai, pll_id, source,
3162 else if (dai->codec && dai->codec->driver->set_pll)
3163 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3168 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3171 * snd_soc_codec_set_pll - configure codec PLL.
3173 * @pll_id: DAI specific PLL ID
3174 * @source: DAI specific source for the PLL
3175 * @freq_in: PLL input clock frequency in Hz
3176 * @freq_out: requested PLL output clock frequency in Hz
3178 * Configures and enables PLL to generate output clock based on input clock.
3180 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3181 unsigned int freq_in, unsigned int freq_out)
3183 if (codec->driver->set_pll)
3184 return codec->driver->set_pll(codec, pll_id, source,
3189 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3192 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3194 * @fmt: SND_SOC_DAIFMT_ format value.
3196 * Configures the DAI hardware format and clocking.
3198 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3200 if (dai->driver && dai->driver->ops->set_fmt)
3201 return dai->driver->ops->set_fmt(dai, fmt);
3205 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3208 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3210 * @tx_mask: bitmask representing active TX slots.
3211 * @rx_mask: bitmask representing active RX slots.
3212 * @slots: Number of slots in use.
3213 * @slot_width: Width in bits for each slot.
3215 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3218 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3219 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3221 if (dai->driver && dai->driver->ops->set_tdm_slot)
3222 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3227 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3230 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3232 * @tx_num: how many TX channels
3233 * @tx_slot: pointer to an array which imply the TX slot number channel
3235 * @rx_num: how many RX channels
3236 * @rx_slot: pointer to an array which imply the RX slot number channel
3239 * configure the relationship between channel number and TDM slot number.
3241 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3242 unsigned int tx_num, unsigned int *tx_slot,
3243 unsigned int rx_num, unsigned int *rx_slot)
3245 if (dai->driver && dai->driver->ops->set_channel_map)
3246 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3251 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3254 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3256 * @tristate: tristate enable
3258 * Tristates the DAI so that others can use it.
3260 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3262 if (dai->driver && dai->driver->ops->set_tristate)
3263 return dai->driver->ops->set_tristate(dai, tristate);
3267 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3270 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3272 * @mute: mute enable
3274 * Mutes the DAI DAC.
3276 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3278 if (dai->driver && dai->driver->ops->digital_mute)
3279 return dai->driver->ops->digital_mute(dai, mute);
3283 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3286 * snd_soc_register_card - Register a card with the ASoC core
3288 * @card: Card to register
3291 int snd_soc_register_card(struct snd_soc_card *card)
3295 if (!card->name || !card->dev)
3298 snd_soc_initialize_card_lists(card);
3300 soc_init_card_debugfs(card);
3302 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3303 (card->num_links + card->num_aux_devs),
3305 if (card->rtd == NULL)
3307 card->rtd_aux = &card->rtd[card->num_links];
3309 for (i = 0; i < card->num_links; i++)
3310 card->rtd[i].dai_link = &card->dai_link[i];
3312 INIT_LIST_HEAD(&card->list);
3313 card->instantiated = 0;
3314 mutex_init(&card->mutex);
3316 mutex_lock(&client_mutex);
3317 list_add(&card->list, &card_list);
3318 snd_soc_instantiate_cards();
3319 mutex_unlock(&client_mutex);
3321 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3325 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3328 * snd_soc_unregister_card - Unregister a card with the ASoC core
3330 * @card: Card to unregister
3333 int snd_soc_unregister_card(struct snd_soc_card *card)
3335 if (card->instantiated)
3336 soc_cleanup_card_resources(card);
3337 mutex_lock(&client_mutex);
3338 list_del(&card->list);
3339 mutex_unlock(&client_mutex);
3340 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3344 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3347 * Simplify DAI link configuration by removing ".-1" from device names
3348 * and sanitizing names.
3350 static char *fmt_single_name(struct device *dev, int *id)
3352 char *found, name[NAME_SIZE];
3355 if (dev_name(dev) == NULL)
3358 strlcpy(name, dev_name(dev), NAME_SIZE);
3360 /* are we a "%s.%d" name (platform and SPI components) */
3361 found = strstr(name, dev->driver->name);
3364 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3366 /* discard ID from name if ID == -1 */
3368 found[strlen(dev->driver->name)] = '\0';
3372 /* I2C component devices are named "bus-addr" */
3373 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3374 char tmp[NAME_SIZE];
3376 /* create unique ID number from I2C addr and bus */
3377 *id = ((id1 & 0xffff) << 16) + id2;
3379 /* sanitize component name for DAI link creation */
3380 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3381 strlcpy(name, tmp, NAME_SIZE);
3386 return kstrdup(name, GFP_KERNEL);
3390 * Simplify DAI link naming for single devices with multiple DAIs by removing
3391 * any ".-1" and using the DAI name (instead of device name).
3393 static inline char *fmt_multiple_name(struct device *dev,
3394 struct snd_soc_dai_driver *dai_drv)
3396 if (dai_drv->name == NULL) {
3397 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3402 return kstrdup(dai_drv->name, GFP_KERNEL);
3406 * snd_soc_register_dai - Register a DAI with the ASoC core
3408 * @dai: DAI to register
3410 int snd_soc_register_dai(struct device *dev,
3411 struct snd_soc_dai_driver *dai_drv)
3413 struct snd_soc_dai *dai;
3415 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3417 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3421 /* create DAI component name */
3422 dai->name = fmt_single_name(dev, &dai->id);
3423 if (dai->name == NULL) {
3429 dai->driver = dai_drv;
3430 if (!dai->driver->ops)
3431 dai->driver->ops = &null_dai_ops;
3433 mutex_lock(&client_mutex);
3434 list_add(&dai->list, &dai_list);
3435 snd_soc_instantiate_cards();
3436 mutex_unlock(&client_mutex);
3438 pr_debug("Registered DAI '%s'\n", dai->name);
3442 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3445 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3447 * @dai: DAI to unregister
3449 void snd_soc_unregister_dai(struct device *dev)
3451 struct snd_soc_dai *dai;
3453 list_for_each_entry(dai, &dai_list, list) {
3454 if (dev == dai->dev)
3460 mutex_lock(&client_mutex);
3461 list_del(&dai->list);
3462 mutex_unlock(&client_mutex);
3464 pr_debug("Unregistered DAI '%s'\n", dai->name);
3468 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3471 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3473 * @dai: Array of DAIs to register
3474 * @count: Number of DAIs
3476 int snd_soc_register_dais(struct device *dev,
3477 struct snd_soc_dai_driver *dai_drv, size_t count)
3479 struct snd_soc_dai *dai;
3482 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3484 for (i = 0; i < count; i++) {
3486 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3492 /* create DAI component name */
3493 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3494 if (dai->name == NULL) {
3501 dai->driver = &dai_drv[i];
3502 if (dai->driver->id)
3503 dai->id = dai->driver->id;
3506 if (!dai->driver->ops)
3507 dai->driver->ops = &null_dai_ops;
3509 mutex_lock(&client_mutex);
3510 list_add(&dai->list, &dai_list);
3511 mutex_unlock(&client_mutex);
3513 pr_debug("Registered DAI '%s'\n", dai->name);
3516 mutex_lock(&client_mutex);
3517 snd_soc_instantiate_cards();
3518 mutex_unlock(&client_mutex);
3522 for (i--; i >= 0; i--)
3523 snd_soc_unregister_dai(dev);
3527 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3530 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3532 * @dai: Array of DAIs to unregister
3533 * @count: Number of DAIs
3535 void snd_soc_unregister_dais(struct device *dev, size_t count)
3539 for (i = 0; i < count; i++)
3540 snd_soc_unregister_dai(dev);
3542 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3545 * snd_soc_register_platform - Register a platform with the ASoC core
3547 * @platform: platform to register
3549 int snd_soc_register_platform(struct device *dev,
3550 struct snd_soc_platform_driver *platform_drv)
3552 struct snd_soc_platform *platform;
3554 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3556 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3557 if (platform == NULL)
3560 /* create platform component name */
3561 platform->name = fmt_single_name(dev, &platform->id);
3562 if (platform->name == NULL) {
3567 platform->dev = dev;
3568 platform->driver = platform_drv;
3570 mutex_lock(&client_mutex);
3571 list_add(&platform->list, &platform_list);
3572 snd_soc_instantiate_cards();
3573 mutex_unlock(&client_mutex);
3575 pr_debug("Registered platform '%s'\n", platform->name);
3579 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3582 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3584 * @platform: platform to unregister
3586 void snd_soc_unregister_platform(struct device *dev)
3588 struct snd_soc_platform *platform;
3590 list_for_each_entry(platform, &platform_list, list) {
3591 if (dev == platform->dev)
3597 mutex_lock(&client_mutex);
3598 list_del(&platform->list);
3599 mutex_unlock(&client_mutex);
3601 pr_debug("Unregistered platform '%s'\n", platform->name);
3602 kfree(platform->name);
3605 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3607 static u64 codec_format_map[] = {
3608 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3609 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3610 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3611 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3612 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3613 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3614 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3615 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3616 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3617 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3618 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3619 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3620 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3621 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3622 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3623 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3626 /* Fix up the DAI formats for endianness: codecs don't actually see
3627 * the endianness of the data but we're using the CPU format
3628 * definitions which do need to include endianness so we ensure that
3629 * codec DAIs always have both big and little endian variants set.
3631 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3635 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3636 if (stream->formats & codec_format_map[i])
3637 stream->formats |= codec_format_map[i];
3641 * snd_soc_register_codec - Register a codec with the ASoC core
3643 * @codec: codec to register
3645 int snd_soc_register_codec(struct device *dev,
3646 const struct snd_soc_codec_driver *codec_drv,
3647 struct snd_soc_dai_driver *dai_drv,
3651 struct snd_soc_codec *codec;
3654 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3656 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3660 /* create CODEC component name */
3661 codec->name = fmt_single_name(dev, &codec->id);
3662 if (codec->name == NULL) {
3667 if (codec_drv->compress_type)
3668 codec->compress_type = codec_drv->compress_type;
3670 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3672 codec->write = codec_drv->write;
3673 codec->read = codec_drv->read;
3674 codec->volatile_register = codec_drv->volatile_register;
3675 codec->readable_register = codec_drv->readable_register;
3676 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3677 codec->dapm.dev = dev;
3678 codec->dapm.codec = codec;
3679 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3681 codec->driver = codec_drv;
3682 codec->num_dai = num_dai;
3683 mutex_init(&codec->mutex);
3685 /* allocate CODEC register cache */
3686 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3687 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3688 codec->reg_size = reg_size;
3689 /* it is necessary to make a copy of the default register cache
3690 * because in the case of using a compression type that requires
3691 * the default register cache to be marked as __devinitconst the
3692 * kernel might have freed the array by the time we initialize
3695 if (codec_drv->reg_cache_default) {
3696 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3697 reg_size, GFP_KERNEL);
3698 if (!codec->reg_def_copy) {
3705 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3706 if (!codec->volatile_register)
3707 codec->volatile_register = snd_soc_default_volatile_register;
3708 if (!codec->readable_register)
3709 codec->readable_register = snd_soc_default_readable_register;
3712 for (i = 0; i < num_dai; i++) {
3713 fixup_codec_formats(&dai_drv[i].playback);
3714 fixup_codec_formats(&dai_drv[i].capture);
3717 /* register any DAIs */
3719 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3724 mutex_lock(&client_mutex);
3725 list_add(&codec->list, &codec_list);
3726 snd_soc_instantiate_cards();
3727 mutex_unlock(&client_mutex);
3729 pr_debug("Registered codec '%s'\n", codec->name);
3733 kfree(codec->reg_def_copy);
3734 codec->reg_def_copy = NULL;
3739 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3742 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3744 * @codec: codec to unregister
3746 void snd_soc_unregister_codec(struct device *dev)
3748 struct snd_soc_codec *codec;
3751 list_for_each_entry(codec, &codec_list, list) {
3752 if (dev == codec->dev)
3759 for (i = 0; i < codec->num_dai; i++)
3760 snd_soc_unregister_dai(dev);
3762 mutex_lock(&client_mutex);
3763 list_del(&codec->list);
3764 mutex_unlock(&client_mutex);
3766 pr_debug("Unregistered codec '%s'\n", codec->name);
3768 snd_soc_cache_exit(codec);
3769 kfree(codec->reg_def_copy);
3773 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3775 static int __init snd_soc_init(void)
3777 #ifdef CONFIG_DEBUG_FS
3778 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3779 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3781 "ASoC: Failed to create debugfs directory\n");
3782 snd_soc_debugfs_root = NULL;
3785 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3787 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3789 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3791 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3793 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3794 &platform_list_fops))
3795 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3798 return platform_driver_register(&soc_driver);
3800 module_init(snd_soc_init);
3802 static void __exit snd_soc_exit(void)
3804 #ifdef CONFIG_DEBUG_FS
3805 debugfs_remove_recursive(snd_soc_debugfs_root);
3807 platform_driver_unregister(&soc_driver);
3809 module_exit(snd_soc_exit);
3811 /* Module information */
3812 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3813 MODULE_DESCRIPTION("ALSA SoC Core");
3814 MODULE_LICENSE("GPL");
3815 MODULE_ALIAS("platform:soc-audio");