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 /* codec register dump */
73 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
75 int ret, i, step = 1, count = 0;
77 if (!codec->driver->reg_cache_size)
80 if (codec->driver->reg_cache_step)
81 step = codec->driver->reg_cache_step;
83 count += sprintf(buf, "%s registers\n", codec->name);
84 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
85 if (codec->readable_register && !codec->readable_register(codec, i))
88 count += sprintf(buf + count, "%2x: ", i);
89 if (count >= PAGE_SIZE - 1)
92 if (codec->driver->display_register) {
93 count += codec->driver->display_register(codec, buf + count,
94 PAGE_SIZE - count, i);
96 /* If the read fails it's almost certainly due to
97 * the register being volatile and the device being
100 ret = snd_soc_read(codec, i);
102 count += snprintf(buf + count,
106 count += snprintf(buf + count,
108 "<no data: %d>", ret);
111 if (count >= PAGE_SIZE - 1)
114 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
115 if (count >= PAGE_SIZE - 1)
119 /* Truncate count; min() would cause a warning */
120 if (count >= PAGE_SIZE)
121 count = PAGE_SIZE - 1;
125 static ssize_t codec_reg_show(struct device *dev,
126 struct device_attribute *attr, char *buf)
128 struct snd_soc_pcm_runtime *rtd =
129 container_of(dev, struct snd_soc_pcm_runtime, dev);
131 return soc_codec_reg_show(rtd->codec, buf);
134 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
136 static ssize_t pmdown_time_show(struct device *dev,
137 struct device_attribute *attr, char *buf)
139 struct snd_soc_pcm_runtime *rtd =
140 container_of(dev, struct snd_soc_pcm_runtime, dev);
142 return sprintf(buf, "%ld\n", rtd->pmdown_time);
145 static ssize_t pmdown_time_set(struct device *dev,
146 struct device_attribute *attr,
147 const char *buf, size_t count)
149 struct snd_soc_pcm_runtime *rtd =
150 container_of(dev, struct snd_soc_pcm_runtime, dev);
153 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
160 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
162 #ifdef CONFIG_DEBUG_FS
163 static int codec_reg_open_file(struct inode *inode, struct file *file)
165 file->private_data = inode->i_private;
169 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
170 size_t count, loff_t *ppos)
173 struct snd_soc_codec *codec = file->private_data;
174 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
177 ret = soc_codec_reg_show(codec, buf);
179 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
184 static ssize_t codec_reg_write_file(struct file *file,
185 const char __user *user_buf, size_t count, loff_t *ppos)
190 unsigned long reg, value;
192 struct snd_soc_codec *codec = file->private_data;
194 buf_size = min(count, (sizeof(buf)-1));
195 if (copy_from_user(buf, user_buf, buf_size))
199 if (codec->driver->reg_cache_step)
200 step = codec->driver->reg_cache_step;
202 while (*start == ' ')
204 reg = simple_strtoul(start, &start, 16);
205 if ((reg >= codec->driver->reg_cache_size) || (reg % step))
207 while (*start == ' ')
209 if (strict_strtoul(start, 16, &value))
212 /* Userspace has been fiddling around behind the kernel's back */
213 add_taint(TAINT_USER);
215 snd_soc_write(codec, reg, value);
219 static const struct file_operations codec_reg_fops = {
220 .open = codec_reg_open_file,
221 .read = codec_reg_read_file,
222 .write = codec_reg_write_file,
223 .llseek = default_llseek,
226 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
228 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
230 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
232 if (!codec->debugfs_codec_root) {
234 "ASoC: Failed to create codec debugfs directory\n");
238 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
239 codec->debugfs_codec_root,
240 codec, &codec_reg_fops);
241 if (!codec->debugfs_reg)
243 "ASoC: Failed to create codec register debugfs file\n");
245 codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
246 codec->debugfs_codec_root);
247 if (!codec->dapm.debugfs_dapm)
249 "Failed to create DAPM debugfs directory\n");
251 snd_soc_dapm_debugfs_init(&codec->dapm);
254 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
256 debugfs_remove_recursive(codec->debugfs_codec_root);
259 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
260 size_t count, loff_t *ppos)
262 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
263 ssize_t len, ret = 0;
264 struct snd_soc_codec *codec;
269 list_for_each_entry(codec, &codec_list, list) {
270 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
274 if (ret > PAGE_SIZE) {
281 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
288 static const struct file_operations codec_list_fops = {
289 .read = codec_list_read_file,
290 .llseek = default_llseek,/* read accesses f_pos */
293 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
294 size_t count, loff_t *ppos)
296 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
297 ssize_t len, ret = 0;
298 struct snd_soc_dai *dai;
303 list_for_each_entry(dai, &dai_list, list) {
304 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
307 if (ret > PAGE_SIZE) {
313 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
320 static const struct file_operations dai_list_fops = {
321 .read = dai_list_read_file,
322 .llseek = default_llseek,/* read accesses f_pos */
325 static ssize_t platform_list_read_file(struct file *file,
326 char __user *user_buf,
327 size_t count, loff_t *ppos)
329 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
330 ssize_t len, ret = 0;
331 struct snd_soc_platform *platform;
336 list_for_each_entry(platform, &platform_list, list) {
337 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
341 if (ret > PAGE_SIZE) {
347 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
354 static const struct file_operations platform_list_fops = {
355 .read = platform_list_read_file,
356 .llseek = default_llseek,/* read accesses f_pos */
359 static void soc_init_card_debugfs(struct snd_soc_card *card)
361 card->debugfs_card_root = debugfs_create_dir(card->name,
362 snd_soc_debugfs_root);
363 if (!card->debugfs_card_root) {
365 "ASoC: Failed to create codec debugfs directory\n");
369 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
370 card->debugfs_card_root,
372 if (!card->debugfs_pop_time)
374 "Failed to create pop time debugfs file\n");
377 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
379 debugfs_remove_recursive(card->debugfs_card_root);
384 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
388 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
392 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
396 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
401 #ifdef CONFIG_SND_SOC_AC97_BUS
402 /* unregister ac97 codec */
403 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
405 if (codec->ac97->dev.bus)
406 device_unregister(&codec->ac97->dev);
410 /* stop no dev release warning */
411 static void soc_ac97_device_release(struct device *dev){}
413 /* register ac97 codec to bus */
414 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
418 codec->ac97->dev.bus = &ac97_bus_type;
419 codec->ac97->dev.parent = codec->card->dev;
420 codec->ac97->dev.release = soc_ac97_device_release;
422 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
423 codec->card->snd_card->number, 0, codec->name);
424 err = device_register(&codec->ac97->dev);
426 snd_printk(KERN_ERR "Can't register ac97 bus\n");
427 codec->ac97->dev.bus = NULL;
434 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
436 struct snd_soc_pcm_runtime *rtd = substream->private_data;
437 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
438 struct snd_soc_dai *codec_dai = rtd->codec_dai;
441 if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
442 rtd->dai_link->symmetric_rates) {
443 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
446 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
447 SNDRV_PCM_HW_PARAM_RATE,
452 "Unable to apply rate symmetry constraint: %d\n", ret);
461 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
462 * then initialized and any private data can be allocated. This also calls
463 * startup for the cpu DAI, platform, machine and codec DAI.
465 static int soc_pcm_open(struct snd_pcm_substream *substream)
467 struct snd_soc_pcm_runtime *rtd = substream->private_data;
468 struct snd_pcm_runtime *runtime = substream->runtime;
469 struct snd_soc_platform *platform = rtd->platform;
470 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
471 struct snd_soc_dai *codec_dai = rtd->codec_dai;
472 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
473 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
476 mutex_lock(&pcm_mutex);
478 /* startup the audio subsystem */
479 if (cpu_dai->driver->ops->startup) {
480 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
482 printk(KERN_ERR "asoc: can't open interface %s\n",
488 if (platform->driver->ops->open) {
489 ret = platform->driver->ops->open(substream);
491 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
496 if (codec_dai->driver->ops->startup) {
497 ret = codec_dai->driver->ops->startup(substream, codec_dai);
499 printk(KERN_ERR "asoc: can't open codec %s\n",
505 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
506 ret = rtd->dai_link->ops->startup(substream);
508 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
513 /* Check that the codec and cpu DAIs are compatible */
514 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
515 runtime->hw.rate_min =
516 max(codec_dai_drv->playback.rate_min,
517 cpu_dai_drv->playback.rate_min);
518 runtime->hw.rate_max =
519 min(codec_dai_drv->playback.rate_max,
520 cpu_dai_drv->playback.rate_max);
521 runtime->hw.channels_min =
522 max(codec_dai_drv->playback.channels_min,
523 cpu_dai_drv->playback.channels_min);
524 runtime->hw.channels_max =
525 min(codec_dai_drv->playback.channels_max,
526 cpu_dai_drv->playback.channels_max);
527 runtime->hw.formats =
528 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
530 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
531 if (codec_dai_drv->playback.rates
532 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
533 runtime->hw.rates |= cpu_dai_drv->playback.rates;
534 if (cpu_dai_drv->playback.rates
535 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
536 runtime->hw.rates |= codec_dai_drv->playback.rates;
538 runtime->hw.rate_min =
539 max(codec_dai_drv->capture.rate_min,
540 cpu_dai_drv->capture.rate_min);
541 runtime->hw.rate_max =
542 min(codec_dai_drv->capture.rate_max,
543 cpu_dai_drv->capture.rate_max);
544 runtime->hw.channels_min =
545 max(codec_dai_drv->capture.channels_min,
546 cpu_dai_drv->capture.channels_min);
547 runtime->hw.channels_max =
548 min(codec_dai_drv->capture.channels_max,
549 cpu_dai_drv->capture.channels_max);
550 runtime->hw.formats =
551 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
553 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
554 if (codec_dai_drv->capture.rates
555 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
556 runtime->hw.rates |= cpu_dai_drv->capture.rates;
557 if (cpu_dai_drv->capture.rates
558 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
559 runtime->hw.rates |= codec_dai_drv->capture.rates;
562 snd_pcm_limit_hw_rates(runtime);
563 if (!runtime->hw.rates) {
564 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
565 codec_dai->name, cpu_dai->name);
568 if (!runtime->hw.formats) {
569 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
570 codec_dai->name, cpu_dai->name);
573 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
574 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
575 codec_dai->name, cpu_dai->name);
579 /* Symmetry only applies if we've already got an active stream. */
580 if (cpu_dai->active || codec_dai->active) {
581 ret = soc_pcm_apply_symmetry(substream);
586 pr_debug("asoc: %s <-> %s info:\n",
587 codec_dai->name, cpu_dai->name);
588 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
589 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
590 runtime->hw.channels_max);
591 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
592 runtime->hw.rate_max);
594 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
595 cpu_dai->playback_active++;
596 codec_dai->playback_active++;
598 cpu_dai->capture_active++;
599 codec_dai->capture_active++;
603 rtd->codec->active++;
604 mutex_unlock(&pcm_mutex);
608 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
609 rtd->dai_link->ops->shutdown(substream);
612 if (codec_dai->driver->ops->shutdown)
613 codec_dai->driver->ops->shutdown(substream, codec_dai);
616 if (platform->driver->ops->close)
617 platform->driver->ops->close(substream);
620 if (cpu_dai->driver->ops->shutdown)
621 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
623 mutex_unlock(&pcm_mutex);
628 * Power down the audio subsystem pmdown_time msecs after close is called.
629 * This is to ensure there are no pops or clicks in between any music tracks
630 * due to DAPM power cycling.
632 static void close_delayed_work(struct work_struct *work)
634 struct snd_soc_pcm_runtime *rtd =
635 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
636 struct snd_soc_dai *codec_dai = rtd->codec_dai;
638 mutex_lock(&pcm_mutex);
640 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
641 codec_dai->driver->playback.stream_name,
642 codec_dai->playback_active ? "active" : "inactive",
643 codec_dai->pop_wait ? "yes" : "no");
645 /* are we waiting on this codec DAI stream */
646 if (codec_dai->pop_wait == 1) {
647 codec_dai->pop_wait = 0;
648 snd_soc_dapm_stream_event(rtd,
649 codec_dai->driver->playback.stream_name,
650 SND_SOC_DAPM_STREAM_STOP);
653 mutex_unlock(&pcm_mutex);
657 * Called by ALSA when a PCM substream is closed. Private data can be
658 * freed here. The cpu DAI, codec DAI, machine and platform are also
661 static int soc_codec_close(struct snd_pcm_substream *substream)
663 struct snd_soc_pcm_runtime *rtd = substream->private_data;
664 struct snd_soc_platform *platform = rtd->platform;
665 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
666 struct snd_soc_dai *codec_dai = rtd->codec_dai;
667 struct snd_soc_codec *codec = rtd->codec;
669 mutex_lock(&pcm_mutex);
671 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
672 cpu_dai->playback_active--;
673 codec_dai->playback_active--;
675 cpu_dai->capture_active--;
676 codec_dai->capture_active--;
683 /* Muting the DAC suppresses artifacts caused during digital
684 * shutdown, for example from stopping clocks.
686 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
687 snd_soc_dai_digital_mute(codec_dai, 1);
689 if (cpu_dai->driver->ops->shutdown)
690 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
692 if (codec_dai->driver->ops->shutdown)
693 codec_dai->driver->ops->shutdown(substream, codec_dai);
695 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
696 rtd->dai_link->ops->shutdown(substream);
698 if (platform->driver->ops->close)
699 platform->driver->ops->close(substream);
700 cpu_dai->runtime = NULL;
702 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
703 /* start delayed pop wq here for playback streams */
704 codec_dai->pop_wait = 1;
705 schedule_delayed_work(&rtd->delayed_work,
706 msecs_to_jiffies(rtd->pmdown_time));
708 /* capture streams can be powered down now */
709 snd_soc_dapm_stream_event(rtd,
710 codec_dai->driver->capture.stream_name,
711 SND_SOC_DAPM_STREAM_STOP);
714 mutex_unlock(&pcm_mutex);
719 * Called by ALSA when the PCM substream is prepared, can set format, sample
720 * rate, etc. This function is non atomic and can be called multiple times,
721 * it can refer to the runtime info.
723 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
725 struct snd_soc_pcm_runtime *rtd = substream->private_data;
726 struct snd_soc_platform *platform = rtd->platform;
727 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
728 struct snd_soc_dai *codec_dai = rtd->codec_dai;
731 mutex_lock(&pcm_mutex);
733 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
734 ret = rtd->dai_link->ops->prepare(substream);
736 printk(KERN_ERR "asoc: machine prepare error\n");
741 if (platform->driver->ops->prepare) {
742 ret = platform->driver->ops->prepare(substream);
744 printk(KERN_ERR "asoc: platform prepare error\n");
749 if (codec_dai->driver->ops->prepare) {
750 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
752 printk(KERN_ERR "asoc: codec DAI prepare error\n");
757 if (cpu_dai->driver->ops->prepare) {
758 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
760 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
765 /* cancel any delayed stream shutdown that is pending */
766 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
767 codec_dai->pop_wait) {
768 codec_dai->pop_wait = 0;
769 cancel_delayed_work(&rtd->delayed_work);
772 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
773 snd_soc_dapm_stream_event(rtd,
774 codec_dai->driver->playback.stream_name,
775 SND_SOC_DAPM_STREAM_START);
777 snd_soc_dapm_stream_event(rtd,
778 codec_dai->driver->capture.stream_name,
779 SND_SOC_DAPM_STREAM_START);
781 snd_soc_dai_digital_mute(codec_dai, 0);
784 mutex_unlock(&pcm_mutex);
789 * Called by ALSA when the hardware params are set by application. This
790 * function can also be called multiple times and can allocate buffers
791 * (using snd_pcm_lib_* ). It's non-atomic.
793 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
794 struct snd_pcm_hw_params *params)
796 struct snd_soc_pcm_runtime *rtd = substream->private_data;
797 struct snd_soc_platform *platform = rtd->platform;
798 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
799 struct snd_soc_dai *codec_dai = rtd->codec_dai;
802 mutex_lock(&pcm_mutex);
804 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
805 ret = rtd->dai_link->ops->hw_params(substream, params);
807 printk(KERN_ERR "asoc: machine hw_params failed\n");
812 if (codec_dai->driver->ops->hw_params) {
813 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
815 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
821 if (cpu_dai->driver->ops->hw_params) {
822 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
824 printk(KERN_ERR "asoc: interface %s hw params failed\n",
830 if (platform->driver->ops->hw_params) {
831 ret = platform->driver->ops->hw_params(substream, params);
833 printk(KERN_ERR "asoc: platform %s hw params failed\n",
839 rtd->rate = params_rate(params);
842 mutex_unlock(&pcm_mutex);
846 if (cpu_dai->driver->ops->hw_free)
847 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
850 if (codec_dai->driver->ops->hw_free)
851 codec_dai->driver->ops->hw_free(substream, codec_dai);
854 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
855 rtd->dai_link->ops->hw_free(substream);
857 mutex_unlock(&pcm_mutex);
862 * Frees resources allocated by hw_params, can be called multiple times
864 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
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;
870 struct snd_soc_codec *codec = rtd->codec;
872 mutex_lock(&pcm_mutex);
874 /* apply codec digital mute */
876 snd_soc_dai_digital_mute(codec_dai, 1);
878 /* free any machine hw params */
879 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
880 rtd->dai_link->ops->hw_free(substream);
882 /* free any DMA resources */
883 if (platform->driver->ops->hw_free)
884 platform->driver->ops->hw_free(substream);
886 /* now free hw params for the DAIs */
887 if (codec_dai->driver->ops->hw_free)
888 codec_dai->driver->ops->hw_free(substream, codec_dai);
890 if (cpu_dai->driver->ops->hw_free)
891 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
893 mutex_unlock(&pcm_mutex);
897 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
899 struct snd_soc_pcm_runtime *rtd = substream->private_data;
900 struct snd_soc_platform *platform = rtd->platform;
901 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
902 struct snd_soc_dai *codec_dai = rtd->codec_dai;
905 if (codec_dai->driver->ops->trigger) {
906 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
911 if (platform->driver->ops->trigger) {
912 ret = platform->driver->ops->trigger(substream, cmd);
917 if (cpu_dai->driver->ops->trigger) {
918 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
926 * soc level wrapper for pointer callback
927 * If cpu_dai, codec_dai, platform driver has the delay callback, than
928 * the runtime->delay will be updated accordingly.
930 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
932 struct snd_soc_pcm_runtime *rtd = substream->private_data;
933 struct snd_soc_platform *platform = rtd->platform;
934 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
935 struct snd_soc_dai *codec_dai = rtd->codec_dai;
936 struct snd_pcm_runtime *runtime = substream->runtime;
937 snd_pcm_uframes_t offset = 0;
938 snd_pcm_sframes_t delay = 0;
940 if (platform->driver->ops->pointer)
941 offset = platform->driver->ops->pointer(substream);
943 if (cpu_dai->driver->ops->delay)
944 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
946 if (codec_dai->driver->ops->delay)
947 delay += codec_dai->driver->ops->delay(substream, codec_dai);
949 if (platform->driver->delay)
950 delay += platform->driver->delay(substream, codec_dai);
952 runtime->delay = delay;
957 /* ASoC PCM operations */
958 static struct snd_pcm_ops soc_pcm_ops = {
959 .open = soc_pcm_open,
960 .close = soc_codec_close,
961 .hw_params = soc_pcm_hw_params,
962 .hw_free = soc_pcm_hw_free,
963 .prepare = soc_pcm_prepare,
964 .trigger = soc_pcm_trigger,
965 .pointer = soc_pcm_pointer,
969 /* powers down audio subsystem for suspend */
970 static int soc_suspend(struct device *dev)
972 struct platform_device *pdev = to_platform_device(dev);
973 struct snd_soc_card *card = platform_get_drvdata(pdev);
974 struct snd_soc_codec *codec;
977 /* If the initialization of this soc device failed, there is no codec
978 * associated with it. Just bail out in this case.
980 if (list_empty(&card->codec_dev_list))
983 /* Due to the resume being scheduled into a workqueue we could
984 * suspend before that's finished - wait for it to complete.
986 snd_power_lock(card->snd_card);
987 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
988 snd_power_unlock(card->snd_card);
990 /* we're going to block userspace touching us until resume completes */
991 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
993 /* mute any active DACs */
994 for (i = 0; i < card->num_rtd; i++) {
995 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
996 struct snd_soc_dai_driver *drv = dai->driver;
998 if (card->rtd[i].dai_link->ignore_suspend)
1001 if (drv->ops->digital_mute && dai->playback_active)
1002 drv->ops->digital_mute(dai, 1);
1005 /* suspend all pcms */
1006 for (i = 0; i < card->num_rtd; i++) {
1007 if (card->rtd[i].dai_link->ignore_suspend)
1010 snd_pcm_suspend_all(card->rtd[i].pcm);
1013 if (card->suspend_pre)
1014 card->suspend_pre(pdev, PMSG_SUSPEND);
1016 for (i = 0; i < card->num_rtd; i++) {
1017 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1018 struct snd_soc_platform *platform = card->rtd[i].platform;
1020 if (card->rtd[i].dai_link->ignore_suspend)
1023 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1024 cpu_dai->driver->suspend(cpu_dai);
1025 if (platform->driver->suspend && !platform->suspended) {
1026 platform->driver->suspend(cpu_dai);
1027 platform->suspended = 1;
1031 /* close any waiting streams and save state */
1032 for (i = 0; i < card->num_rtd; i++) {
1033 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1034 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1037 for (i = 0; i < card->num_rtd; i++) {
1038 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1040 if (card->rtd[i].dai_link->ignore_suspend)
1043 if (driver->playback.stream_name != NULL)
1044 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1045 SND_SOC_DAPM_STREAM_SUSPEND);
1047 if (driver->capture.stream_name != NULL)
1048 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1049 SND_SOC_DAPM_STREAM_SUSPEND);
1052 /* suspend all CODECs */
1053 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1054 /* If there are paths active then the CODEC will be held with
1055 * bias _ON and should not be suspended. */
1056 if (!codec->suspended && codec->driver->suspend) {
1057 switch (codec->dapm.bias_level) {
1058 case SND_SOC_BIAS_STANDBY:
1059 case SND_SOC_BIAS_OFF:
1060 codec->driver->suspend(codec, PMSG_SUSPEND);
1061 codec->suspended = 1;
1064 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1070 for (i = 0; i < card->num_rtd; i++) {
1071 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1073 if (card->rtd[i].dai_link->ignore_suspend)
1076 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1077 cpu_dai->driver->suspend(cpu_dai);
1080 if (card->suspend_post)
1081 card->suspend_post(pdev, PMSG_SUSPEND);
1086 /* deferred resume work, so resume can complete before we finished
1087 * setting our codec back up, which can be very slow on I2C
1089 static void soc_resume_deferred(struct work_struct *work)
1091 struct snd_soc_card *card =
1092 container_of(work, struct snd_soc_card, deferred_resume_work);
1093 struct platform_device *pdev = to_platform_device(card->dev);
1094 struct snd_soc_codec *codec;
1097 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1098 * so userspace apps are blocked from touching us
1101 dev_dbg(card->dev, "starting resume work\n");
1103 /* Bring us up into D2 so that DAPM starts enabling things */
1104 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1106 if (card->resume_pre)
1107 card->resume_pre(pdev);
1109 /* resume AC97 DAIs */
1110 for (i = 0; i < card->num_rtd; i++) {
1111 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1113 if (card->rtd[i].dai_link->ignore_suspend)
1116 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1117 cpu_dai->driver->resume(cpu_dai);
1120 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1121 /* If the CODEC was idle over suspend then it will have been
1122 * left with bias OFF or STANDBY and suspended so we must now
1123 * resume. Otherwise the suspend was suppressed.
1125 if (codec->driver->resume && codec->suspended) {
1126 switch (codec->dapm.bias_level) {
1127 case SND_SOC_BIAS_STANDBY:
1128 case SND_SOC_BIAS_OFF:
1129 codec->driver->resume(codec);
1130 codec->suspended = 0;
1133 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1139 for (i = 0; i < card->num_rtd; i++) {
1140 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1142 if (card->rtd[i].dai_link->ignore_suspend)
1145 if (driver->playback.stream_name != NULL)
1146 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1147 SND_SOC_DAPM_STREAM_RESUME);
1149 if (driver->capture.stream_name != NULL)
1150 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1151 SND_SOC_DAPM_STREAM_RESUME);
1154 /* unmute any active DACs */
1155 for (i = 0; i < card->num_rtd; i++) {
1156 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1157 struct snd_soc_dai_driver *drv = dai->driver;
1159 if (card->rtd[i].dai_link->ignore_suspend)
1162 if (drv->ops->digital_mute && dai->playback_active)
1163 drv->ops->digital_mute(dai, 0);
1166 for (i = 0; i < card->num_rtd; i++) {
1167 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1168 struct snd_soc_platform *platform = card->rtd[i].platform;
1170 if (card->rtd[i].dai_link->ignore_suspend)
1173 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1174 cpu_dai->driver->resume(cpu_dai);
1175 if (platform->driver->resume && platform->suspended) {
1176 platform->driver->resume(cpu_dai);
1177 platform->suspended = 0;
1181 if (card->resume_post)
1182 card->resume_post(pdev);
1184 dev_dbg(card->dev, "resume work completed\n");
1186 /* userspace can access us now we are back as we were before */
1187 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1190 /* powers up audio subsystem after a suspend */
1191 static int soc_resume(struct device *dev)
1193 struct platform_device *pdev = to_platform_device(dev);
1194 struct snd_soc_card *card = platform_get_drvdata(pdev);
1197 /* AC97 devices might have other drivers hanging off them so
1198 * need to resume immediately. Other drivers don't have that
1199 * problem and may take a substantial amount of time to resume
1200 * due to I/O costs and anti-pop so handle them out of line.
1202 for (i = 0; i < card->num_rtd; i++) {
1203 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1204 if (cpu_dai->driver->ac97_control) {
1205 dev_dbg(dev, "Resuming AC97 immediately\n");
1206 soc_resume_deferred(&card->deferred_resume_work);
1208 dev_dbg(dev, "Scheduling resume work\n");
1209 if (!schedule_work(&card->deferred_resume_work))
1210 dev_err(dev, "resume work item may be lost\n");
1217 #define soc_suspend NULL
1218 #define soc_resume NULL
1221 static struct snd_soc_dai_ops null_dai_ops = {
1224 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1226 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1227 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1228 struct snd_soc_codec *codec;
1229 struct snd_soc_platform *platform;
1230 struct snd_soc_dai *codec_dai, *cpu_dai;
1234 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1236 /* do we already have the CPU DAI for this link ? */
1240 /* no, then find CPU DAI from registered DAIs*/
1241 list_for_each_entry(cpu_dai, &dai_list, list) {
1242 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1244 if (!try_module_get(cpu_dai->dev->driver->owner))
1247 rtd->cpu_dai = cpu_dai;
1251 dev_dbg(card->dev, "CPU DAI %s not registered\n",
1252 dai_link->cpu_dai_name);
1255 /* do we already have the CODEC for this link ? */
1260 /* no, then find CODEC from registered CODECs*/
1261 list_for_each_entry(codec, &codec_list, list) {
1262 if (!strcmp(codec->name, dai_link->codec_name)) {
1265 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1266 list_for_each_entry(codec_dai, &dai_list, list) {
1267 if (codec->dev == codec_dai->dev &&
1268 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1269 rtd->codec_dai = codec_dai;
1273 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1274 dai_link->codec_dai_name);
1279 dev_dbg(card->dev, "CODEC %s not registered\n",
1280 dai_link->codec_name);
1283 /* do we already have the CODEC DAI for this link ? */
1284 if (rtd->platform) {
1287 /* no, then find CPU DAI from registered DAIs*/
1288 list_for_each_entry(platform, &platform_list, list) {
1289 if (!strcmp(platform->name, dai_link->platform_name)) {
1290 rtd->platform = platform;
1295 dev_dbg(card->dev, "platform %s not registered\n",
1296 dai_link->platform_name);
1300 /* mark rtd as complete if we found all 4 of our client devices */
1301 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1308 static void soc_remove_codec(struct snd_soc_codec *codec)
1312 if (codec->driver->remove) {
1313 err = codec->driver->remove(codec);
1316 "asoc: failed to remove %s: %d\n",
1320 /* Make sure all DAPM widgets are freed */
1321 snd_soc_dapm_free(&codec->dapm);
1323 soc_cleanup_codec_debugfs(codec);
1325 list_del(&codec->card_list);
1326 module_put(codec->dev->driver->owner);
1329 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1331 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1332 struct snd_soc_codec *codec = rtd->codec;
1333 struct snd_soc_platform *platform = rtd->platform;
1334 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1337 /* unregister the rtd device */
1338 if (rtd->dev_registered) {
1339 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1340 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1341 device_unregister(&rtd->dev);
1342 rtd->dev_registered = 0;
1345 /* remove the CODEC DAI */
1346 if (codec_dai && codec_dai->probed) {
1347 if (codec_dai->driver->remove) {
1348 err = codec_dai->driver->remove(codec_dai);
1350 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1352 codec_dai->probed = 0;
1353 list_del(&codec_dai->card_list);
1356 /* remove the platform */
1357 if (platform && platform->probed) {
1358 if (platform->driver->remove) {
1359 err = platform->driver->remove(platform);
1361 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1363 platform->probed = 0;
1364 list_del(&platform->card_list);
1365 module_put(platform->dev->driver->owner);
1368 /* remove the CODEC */
1369 if (codec && codec->probed)
1370 soc_remove_codec(codec);
1372 /* remove the cpu_dai */
1373 if (cpu_dai && cpu_dai->probed) {
1374 if (cpu_dai->driver->remove) {
1375 err = cpu_dai->driver->remove(cpu_dai);
1377 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1379 cpu_dai->probed = 0;
1380 list_del(&cpu_dai->card_list);
1381 module_put(cpu_dai->dev->driver->owner);
1385 static void soc_set_name_prefix(struct snd_soc_card *card,
1386 struct snd_soc_codec *codec)
1390 if (card->codec_conf == NULL)
1393 for (i = 0; i < card->num_configs; i++) {
1394 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1395 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1396 codec->name_prefix = map->name_prefix;
1402 static int soc_probe_codec(struct snd_soc_card *card,
1403 struct snd_soc_codec *codec)
1408 codec->dapm.card = card;
1409 soc_set_name_prefix(card, codec);
1411 if (codec->driver->probe) {
1412 ret = codec->driver->probe(codec);
1415 "asoc: failed to probe CODEC %s: %d\n",
1421 soc_init_codec_debugfs(codec);
1423 /* mark codec as probed and add to card codec list */
1424 if (!try_module_get(codec->dev->driver->owner))
1428 list_add(&codec->card_list, &card->codec_dev_list);
1429 list_add(&codec->dapm.list, &card->dapm_list);
1434 static void rtd_release(struct device *dev) {}
1436 static int soc_post_component_init(struct snd_soc_card *card,
1437 struct snd_soc_codec *codec,
1438 int num, int dailess)
1440 struct snd_soc_dai_link *dai_link = NULL;
1441 struct snd_soc_aux_dev *aux_dev = NULL;
1442 struct snd_soc_pcm_runtime *rtd;
1443 const char *temp, *name;
1447 dai_link = &card->dai_link[num];
1448 rtd = &card->rtd[num];
1449 name = dai_link->name;
1451 aux_dev = &card->aux_dev[num];
1452 rtd = &card->rtd_aux[num];
1453 name = aux_dev->name;
1456 /* machine controls, routes and widgets are not prefixed */
1457 temp = codec->name_prefix;
1458 codec->name_prefix = NULL;
1460 /* do machine specific initialization */
1461 if (!dailess && dai_link->init)
1462 ret = dai_link->init(rtd);
1463 else if (dailess && aux_dev->init)
1464 ret = aux_dev->init(&codec->dapm);
1466 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1469 codec->name_prefix = temp;
1471 /* Make sure all DAPM widgets are instantiated */
1472 snd_soc_dapm_new_widgets(&codec->dapm);
1474 /* register the rtd device */
1477 rtd->dev.parent = card->dev;
1478 rtd->dev.release = rtd_release;
1479 rtd->dev.init_name = name;
1480 ret = device_register(&rtd->dev);
1483 "asoc: failed to register runtime device: %d\n", ret);
1486 rtd->dev_registered = 1;
1488 /* add DAPM sysfs entries for this codec */
1489 ret = snd_soc_dapm_sys_add(&rtd->dev);
1492 "asoc: failed to add codec dapm sysfs entries: %d\n",
1495 /* add codec sysfs entries */
1496 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1499 "asoc: failed to add codec sysfs files: %d\n", ret);
1504 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1506 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1507 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1508 struct snd_soc_codec *codec = rtd->codec;
1509 struct snd_soc_platform *platform = rtd->platform;
1510 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1513 dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1515 /* config components */
1516 codec_dai->codec = codec;
1517 cpu_dai->platform = platform;
1518 codec_dai->card = card;
1519 cpu_dai->card = card;
1521 /* set default power off timeout */
1522 rtd->pmdown_time = pmdown_time;
1524 /* probe the cpu_dai */
1525 if (!cpu_dai->probed) {
1526 if (cpu_dai->driver->probe) {
1527 ret = cpu_dai->driver->probe(cpu_dai);
1529 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1534 cpu_dai->probed = 1;
1535 /* mark cpu_dai as probed and add to card cpu_dai list */
1536 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1539 /* probe the CODEC */
1540 if (!codec->probed) {
1541 ret = soc_probe_codec(card, codec);
1546 /* probe the platform */
1547 if (!platform->probed) {
1548 if (platform->driver->probe) {
1549 ret = platform->driver->probe(platform);
1551 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1556 /* mark platform as probed and add to card platform list */
1558 if (!try_module_get(platform->dev->driver->owner))
1561 platform->probed = 1;
1562 list_add(&platform->card_list, &card->platform_dev_list);
1565 /* probe the CODEC DAI */
1566 if (!codec_dai->probed) {
1567 if (codec_dai->driver->probe) {
1568 ret = codec_dai->driver->probe(codec_dai);
1570 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1576 /* mark cpu_dai as probed and add to card cpu_dai list */
1577 codec_dai->probed = 1;
1578 list_add(&codec_dai->card_list, &card->dai_dev_list);
1581 /* DAPM dai link stream work */
1582 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1584 ret = soc_post_component_init(card, codec, num, 0);
1588 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1590 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1592 /* create the pcm */
1593 ret = soc_new_pcm(rtd, num);
1595 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1599 /* add platform data for AC97 devices */
1600 if (rtd->codec_dai->driver->ac97_control)
1601 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1606 #ifdef CONFIG_SND_SOC_AC97_BUS
1607 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1611 /* Only instantiate AC97 if not already done by the adaptor
1612 * for the generic AC97 subsystem.
1614 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1616 * It is possible that the AC97 device is already registered to
1617 * the device subsystem. This happens when the device is created
1618 * via snd_ac97_mixer(). Currently only SoC codec that does so
1619 * is the generic AC97 glue but others migh emerge.
1621 * In those cases we don't try to register the device again.
1623 if (!rtd->codec->ac97_created)
1626 ret = soc_ac97_dev_register(rtd->codec);
1628 printk(KERN_ERR "asoc: AC97 device register failed\n");
1632 rtd->codec->ac97_registered = 1;
1637 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1639 if (codec->ac97_registered) {
1640 soc_ac97_dev_unregister(codec);
1641 codec->ac97_registered = 0;
1646 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1648 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1649 struct snd_soc_codec *codec;
1652 /* find CODEC from registered CODECs*/
1653 list_for_each_entry(codec, &codec_list, list) {
1654 if (!strcmp(codec->name, aux_dev->codec_name)) {
1655 if (codec->probed) {
1657 "asoc: codec already probed");
1664 /* codec not found */
1665 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1669 if (!try_module_get(codec->dev->driver->owner))
1672 ret = soc_probe_codec(card, codec);
1676 ret = soc_post_component_init(card, codec, num, 1);
1682 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1684 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1685 struct snd_soc_codec *codec = rtd->codec;
1687 /* unregister the rtd device */
1688 if (rtd->dev_registered) {
1689 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1690 device_unregister(&rtd->dev);
1691 rtd->dev_registered = 0;
1694 if (codec && codec->probed)
1695 soc_remove_codec(codec);
1698 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1699 enum snd_soc_compress_type compress_type)
1703 if (codec->cache_init)
1706 /* override the compress_type if necessary */
1707 if (compress_type && codec->compress_type != compress_type)
1708 codec->compress_type = compress_type;
1709 ret = snd_soc_cache_init(codec);
1711 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1715 codec->cache_init = 1;
1719 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1721 struct platform_device *pdev = to_platform_device(card->dev);
1722 struct snd_soc_codec *codec;
1723 struct snd_soc_codec_conf *codec_conf;
1724 enum snd_soc_compress_type compress_type;
1727 mutex_lock(&card->mutex);
1729 if (card->instantiated) {
1730 mutex_unlock(&card->mutex);
1735 for (i = 0; i < card->num_links; i++)
1736 soc_bind_dai_link(card, i);
1738 /* bind completed ? */
1739 if (card->num_rtd != card->num_links) {
1740 mutex_unlock(&card->mutex);
1744 /* initialize the register cache for each available codec */
1745 list_for_each_entry(codec, &codec_list, list) {
1746 if (codec->cache_init)
1748 /* by default we don't override the compress_type */
1750 /* check to see if we need to override the compress_type */
1751 for (i = 0; i < card->num_configs; ++i) {
1752 codec_conf = &card->codec_conf[i];
1753 if (!strcmp(codec->name, codec_conf->dev_name)) {
1754 compress_type = codec_conf->compress_type;
1755 if (compress_type && compress_type
1756 != codec->compress_type)
1760 ret = snd_soc_init_codec_cache(codec, compress_type);
1762 mutex_unlock(&card->mutex);
1767 /* card bind complete so register a sound card */
1768 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1769 card->owner, 0, &card->snd_card);
1771 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1773 mutex_unlock(&card->mutex);
1776 card->snd_card->dev = card->dev;
1779 /* deferred resume work */
1780 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1783 /* initialise the sound card only once */
1785 ret = card->probe(pdev);
1787 goto card_probe_error;
1790 for (i = 0; i < card->num_links; i++) {
1791 ret = soc_probe_dai_link(card, i);
1793 pr_err("asoc: failed to instantiate card %s: %d\n",
1799 for (i = 0; i < card->num_aux_devs; i++) {
1800 ret = soc_probe_aux_dev(card, i);
1802 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1804 goto probe_aux_dev_err;
1808 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1810 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1813 ret = snd_card_register(card->snd_card);
1815 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1816 goto probe_aux_dev_err;
1819 #ifdef CONFIG_SND_SOC_AC97_BUS
1820 /* register any AC97 codecs */
1821 for (i = 0; i < card->num_rtd; i++) {
1822 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1824 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1826 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1827 goto probe_aux_dev_err;
1832 card->instantiated = 1;
1833 mutex_unlock(&card->mutex);
1837 for (i = 0; i < card->num_aux_devs; i++)
1838 soc_remove_aux_dev(card, i);
1841 for (i = 0; i < card->num_links; i++)
1842 soc_remove_dai_link(card, i);
1848 snd_card_free(card->snd_card);
1850 mutex_unlock(&card->mutex);
1854 * Attempt to initialise any uninitialised cards. Must be called with
1857 static void snd_soc_instantiate_cards(void)
1859 struct snd_soc_card *card;
1860 list_for_each_entry(card, &card_list, list)
1861 snd_soc_instantiate_card(card);
1864 /* probes a new socdev */
1865 static int soc_probe(struct platform_device *pdev)
1867 struct snd_soc_card *card = platform_get_drvdata(pdev);
1871 * no card, so machine driver should be registering card
1872 * we should not be here in that case so ret error
1877 /* Bodge while we unpick instantiation */
1878 card->dev = &pdev->dev;
1879 snd_soc_initialize_card_lists(card);
1881 ret = snd_soc_register_card(card);
1883 dev_err(&pdev->dev, "Failed to register card\n");
1890 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1892 struct platform_device *pdev = to_platform_device(card->dev);
1895 /* make sure any delayed work runs */
1896 for (i = 0; i < card->num_rtd; i++) {
1897 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1898 flush_delayed_work_sync(&rtd->delayed_work);
1901 /* remove auxiliary devices */
1902 for (i = 0; i < card->num_aux_devs; i++)
1903 soc_remove_aux_dev(card, i);
1905 /* remove and free each DAI */
1906 for (i = 0; i < card->num_rtd; i++)
1907 soc_remove_dai_link(card, i);
1909 soc_cleanup_card_debugfs(card);
1911 /* remove the card */
1916 snd_card_free(card->snd_card);
1921 /* removes a socdev */
1922 static int soc_remove(struct platform_device *pdev)
1924 struct snd_soc_card *card = platform_get_drvdata(pdev);
1926 snd_soc_unregister_card(card);
1930 static int soc_poweroff(struct device *dev)
1932 struct platform_device *pdev = to_platform_device(dev);
1933 struct snd_soc_card *card = platform_get_drvdata(pdev);
1936 if (!card->instantiated)
1939 /* Flush out pmdown_time work - we actually do want to run it
1940 * now, we're shutting down so no imminent restart. */
1941 for (i = 0; i < card->num_rtd; i++) {
1942 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1943 flush_delayed_work_sync(&rtd->delayed_work);
1946 snd_soc_dapm_shutdown(card);
1951 static const struct dev_pm_ops soc_pm_ops = {
1952 .suspend = soc_suspend,
1953 .resume = soc_resume,
1954 .poweroff = soc_poweroff,
1957 /* ASoC platform driver */
1958 static struct platform_driver soc_driver = {
1960 .name = "soc-audio",
1961 .owner = THIS_MODULE,
1965 .remove = soc_remove,
1968 /* create a new pcm */
1969 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1971 struct snd_soc_codec *codec = rtd->codec;
1972 struct snd_soc_platform *platform = rtd->platform;
1973 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1974 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1975 struct snd_pcm *pcm;
1977 int ret = 0, playback = 0, capture = 0;
1979 /* check client and interface hw capabilities */
1980 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1981 rtd->dai_link->stream_name, codec_dai->name, num);
1983 if (codec_dai->driver->playback.channels_min)
1985 if (codec_dai->driver->capture.channels_min)
1988 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
1989 ret = snd_pcm_new(rtd->card->snd_card, new_name,
1990 num, playback, capture, &pcm);
1992 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
1997 pcm->private_data = rtd;
1998 soc_pcm_ops.mmap = platform->driver->ops->mmap;
1999 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2000 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2001 soc_pcm_ops.copy = platform->driver->ops->copy;
2002 soc_pcm_ops.silence = platform->driver->ops->silence;
2003 soc_pcm_ops.ack = platform->driver->ops->ack;
2004 soc_pcm_ops.page = platform->driver->ops->page;
2007 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2010 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2012 ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2014 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2018 pcm->private_free = platform->driver->pcm_free;
2019 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2025 * snd_soc_codec_volatile_register: Report if a register is volatile.
2027 * @codec: CODEC to query.
2028 * @reg: Register to query.
2030 * Boolean function indiciating if a CODEC register is volatile.
2032 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
2034 if (codec->volatile_register)
2035 return codec->volatile_register(codec, reg);
2039 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2042 * snd_soc_new_ac97_codec - initailise AC97 device
2043 * @codec: audio codec
2044 * @ops: AC97 bus operations
2045 * @num: AC97 codec number
2047 * Initialises AC97 codec resources for use by ad-hoc devices only.
2049 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2050 struct snd_ac97_bus_ops *ops, int num)
2052 mutex_lock(&codec->mutex);
2054 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2055 if (codec->ac97 == NULL) {
2056 mutex_unlock(&codec->mutex);
2060 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2061 if (codec->ac97->bus == NULL) {
2064 mutex_unlock(&codec->mutex);
2068 codec->ac97->bus->ops = ops;
2069 codec->ac97->num = num;
2072 * Mark the AC97 device to be created by us. This way we ensure that the
2073 * device will be registered with the device subsystem later on.
2075 codec->ac97_created = 1;
2077 mutex_unlock(&codec->mutex);
2080 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2083 * snd_soc_free_ac97_codec - free AC97 codec device
2084 * @codec: audio codec
2086 * Frees AC97 codec device resources.
2088 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2090 mutex_lock(&codec->mutex);
2091 #ifdef CONFIG_SND_SOC_AC97_BUS
2092 soc_unregister_ac97_dai_link(codec);
2094 kfree(codec->ac97->bus);
2097 codec->ac97_created = 0;
2098 mutex_unlock(&codec->mutex);
2100 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2102 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2106 ret = codec->read(codec, reg);
2107 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2108 trace_snd_soc_reg_read(codec, reg, ret);
2112 EXPORT_SYMBOL_GPL(snd_soc_read);
2114 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2115 unsigned int reg, unsigned int val)
2117 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2118 trace_snd_soc_reg_write(codec, reg, val);
2119 return codec->write(codec, reg, val);
2121 EXPORT_SYMBOL_GPL(snd_soc_write);
2124 * snd_soc_update_bits - update codec register bits
2125 * @codec: audio codec
2126 * @reg: codec register
2127 * @mask: register mask
2130 * Writes new register value.
2132 * Returns 1 for change, 0 for no change, or negative error code.
2134 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2135 unsigned int mask, unsigned int value)
2138 unsigned int old, new;
2141 ret = snd_soc_read(codec, reg);
2146 new = (old & ~mask) | value;
2147 change = old != new;
2149 ret = snd_soc_write(codec, reg, new);
2156 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2159 * snd_soc_update_bits_locked - update codec register bits
2160 * @codec: audio codec
2161 * @reg: codec register
2162 * @mask: register mask
2165 * Writes new register value, and takes the codec mutex.
2167 * Returns 1 for change else 0.
2169 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2170 unsigned short reg, unsigned int mask,
2175 mutex_lock(&codec->mutex);
2176 change = snd_soc_update_bits(codec, reg, mask, value);
2177 mutex_unlock(&codec->mutex);
2181 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2184 * snd_soc_test_bits - test register for change
2185 * @codec: audio codec
2186 * @reg: codec register
2187 * @mask: register mask
2190 * Tests a register with a new value and checks if the new value is
2191 * different from the old value.
2193 * Returns 1 for change else 0.
2195 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2196 unsigned int mask, unsigned int value)
2199 unsigned int old, new;
2201 old = snd_soc_read(codec, reg);
2202 new = (old & ~mask) | value;
2203 change = old != new;
2207 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2210 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2211 * @substream: the pcm substream
2212 * @hw: the hardware parameters
2214 * Sets the substream runtime hardware parameters.
2216 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2217 const struct snd_pcm_hardware *hw)
2219 struct snd_pcm_runtime *runtime = substream->runtime;
2220 runtime->hw.info = hw->info;
2221 runtime->hw.formats = hw->formats;
2222 runtime->hw.period_bytes_min = hw->period_bytes_min;
2223 runtime->hw.period_bytes_max = hw->period_bytes_max;
2224 runtime->hw.periods_min = hw->periods_min;
2225 runtime->hw.periods_max = hw->periods_max;
2226 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2227 runtime->hw.fifo_size = hw->fifo_size;
2230 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2233 * snd_soc_cnew - create new control
2234 * @_template: control template
2235 * @data: control private data
2236 * @long_name: control long name
2238 * Create a new mixer control from a template control.
2240 * Returns 0 for success, else error.
2242 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2243 void *data, char *long_name)
2245 struct snd_kcontrol_new template;
2247 memcpy(&template, _template, sizeof(template));
2249 template.name = long_name;
2252 return snd_ctl_new1(&template, data);
2254 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2257 * snd_soc_add_controls - add an array of controls to a codec.
2258 * Convienience function to add a list of controls. Many codecs were
2259 * duplicating this code.
2261 * @codec: codec to add controls to
2262 * @controls: array of controls to add
2263 * @num_controls: number of elements in the array
2265 * Return 0 for success, else error.
2267 int snd_soc_add_controls(struct snd_soc_codec *codec,
2268 const struct snd_kcontrol_new *controls, int num_controls)
2270 struct snd_card *card = codec->card->snd_card;
2271 char prefixed_name[44], *name;
2274 for (i = 0; i < num_controls; i++) {
2275 const struct snd_kcontrol_new *control = &controls[i];
2276 if (codec->name_prefix) {
2277 snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
2278 codec->name_prefix, control->name);
2279 name = prefixed_name;
2281 name = control->name;
2283 err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
2285 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2286 codec->name, name, err);
2293 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2296 * snd_soc_info_enum_double - enumerated double mixer info callback
2297 * @kcontrol: mixer control
2298 * @uinfo: control element information
2300 * Callback to provide information about a double enumerated
2303 * Returns 0 for success.
2305 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2306 struct snd_ctl_elem_info *uinfo)
2308 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2310 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2311 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2312 uinfo->value.enumerated.items = e->max;
2314 if (uinfo->value.enumerated.item > e->max - 1)
2315 uinfo->value.enumerated.item = e->max - 1;
2316 strcpy(uinfo->value.enumerated.name,
2317 e->texts[uinfo->value.enumerated.item]);
2320 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2323 * snd_soc_get_enum_double - enumerated double mixer get callback
2324 * @kcontrol: mixer control
2325 * @ucontrol: control element information
2327 * Callback to get the value of a double enumerated mixer.
2329 * Returns 0 for success.
2331 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2332 struct snd_ctl_elem_value *ucontrol)
2334 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2335 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2336 unsigned int val, bitmask;
2338 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2340 val = snd_soc_read(codec, e->reg);
2341 ucontrol->value.enumerated.item[0]
2342 = (val >> e->shift_l) & (bitmask - 1);
2343 if (e->shift_l != e->shift_r)
2344 ucontrol->value.enumerated.item[1] =
2345 (val >> e->shift_r) & (bitmask - 1);
2349 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2352 * snd_soc_put_enum_double - enumerated double mixer put callback
2353 * @kcontrol: mixer control
2354 * @ucontrol: control element information
2356 * Callback to set the value of a double enumerated mixer.
2358 * Returns 0 for success.
2360 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2361 struct snd_ctl_elem_value *ucontrol)
2363 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2364 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2366 unsigned int mask, bitmask;
2368 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2370 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2372 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2373 mask = (bitmask - 1) << e->shift_l;
2374 if (e->shift_l != e->shift_r) {
2375 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2377 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2378 mask |= (bitmask - 1) << e->shift_r;
2381 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2383 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2386 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2387 * @kcontrol: mixer control
2388 * @ucontrol: control element information
2390 * Callback to get the value of a double semi enumerated mixer.
2392 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2393 * used for handling bitfield coded enumeration for example.
2395 * Returns 0 for success.
2397 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2398 struct snd_ctl_elem_value *ucontrol)
2400 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2401 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2402 unsigned int reg_val, val, mux;
2404 reg_val = snd_soc_read(codec, e->reg);
2405 val = (reg_val >> e->shift_l) & e->mask;
2406 for (mux = 0; mux < e->max; mux++) {
2407 if (val == e->values[mux])
2410 ucontrol->value.enumerated.item[0] = mux;
2411 if (e->shift_l != e->shift_r) {
2412 val = (reg_val >> e->shift_r) & e->mask;
2413 for (mux = 0; mux < e->max; mux++) {
2414 if (val == e->values[mux])
2417 ucontrol->value.enumerated.item[1] = mux;
2422 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2425 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2426 * @kcontrol: mixer control
2427 * @ucontrol: control element information
2429 * Callback to set the value of a double semi enumerated mixer.
2431 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2432 * used for handling bitfield coded enumeration for example.
2434 * Returns 0 for success.
2436 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2437 struct snd_ctl_elem_value *ucontrol)
2439 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2440 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2444 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2446 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2447 mask = e->mask << e->shift_l;
2448 if (e->shift_l != e->shift_r) {
2449 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2451 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2452 mask |= e->mask << e->shift_r;
2455 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2457 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2460 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2461 * @kcontrol: mixer control
2462 * @uinfo: control element information
2464 * Callback to provide information about an external enumerated
2467 * Returns 0 for success.
2469 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2470 struct snd_ctl_elem_info *uinfo)
2472 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2474 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2476 uinfo->value.enumerated.items = e->max;
2478 if (uinfo->value.enumerated.item > e->max - 1)
2479 uinfo->value.enumerated.item = e->max - 1;
2480 strcpy(uinfo->value.enumerated.name,
2481 e->texts[uinfo->value.enumerated.item]);
2484 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2487 * snd_soc_info_volsw_ext - external single mixer info callback
2488 * @kcontrol: mixer control
2489 * @uinfo: control element information
2491 * Callback to provide information about a single external mixer control.
2493 * Returns 0 for success.
2495 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2496 struct snd_ctl_elem_info *uinfo)
2498 int max = kcontrol->private_value;
2500 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2501 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2503 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2506 uinfo->value.integer.min = 0;
2507 uinfo->value.integer.max = max;
2510 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2513 * snd_soc_info_volsw - single mixer info callback
2514 * @kcontrol: mixer control
2515 * @uinfo: control element information
2517 * Callback to provide information about a single mixer control.
2519 * Returns 0 for success.
2521 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2522 struct snd_ctl_elem_info *uinfo)
2524 struct soc_mixer_control *mc =
2525 (struct soc_mixer_control *)kcontrol->private_value;
2527 unsigned int shift = mc->shift;
2528 unsigned int rshift = mc->rshift;
2530 if (!mc->platform_max)
2531 mc->platform_max = mc->max;
2532 platform_max = mc->platform_max;
2534 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2535 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2537 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2539 uinfo->count = shift == rshift ? 1 : 2;
2540 uinfo->value.integer.min = 0;
2541 uinfo->value.integer.max = platform_max;
2544 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2547 * snd_soc_get_volsw - single mixer get callback
2548 * @kcontrol: mixer control
2549 * @ucontrol: control element information
2551 * Callback to get the value of a single mixer control.
2553 * Returns 0 for success.
2555 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2556 struct snd_ctl_elem_value *ucontrol)
2558 struct soc_mixer_control *mc =
2559 (struct soc_mixer_control *)kcontrol->private_value;
2560 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2561 unsigned int reg = mc->reg;
2562 unsigned int shift = mc->shift;
2563 unsigned int rshift = mc->rshift;
2565 unsigned int mask = (1 << fls(max)) - 1;
2566 unsigned int invert = mc->invert;
2568 ucontrol->value.integer.value[0] =
2569 (snd_soc_read(codec, reg) >> shift) & mask;
2570 if (shift != rshift)
2571 ucontrol->value.integer.value[1] =
2572 (snd_soc_read(codec, reg) >> rshift) & mask;
2574 ucontrol->value.integer.value[0] =
2575 max - ucontrol->value.integer.value[0];
2576 if (shift != rshift)
2577 ucontrol->value.integer.value[1] =
2578 max - ucontrol->value.integer.value[1];
2583 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2586 * snd_soc_put_volsw - single mixer put callback
2587 * @kcontrol: mixer control
2588 * @ucontrol: control element information
2590 * Callback to set the value of a single mixer control.
2592 * Returns 0 for success.
2594 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2595 struct snd_ctl_elem_value *ucontrol)
2597 struct soc_mixer_control *mc =
2598 (struct soc_mixer_control *)kcontrol->private_value;
2599 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2600 unsigned int reg = mc->reg;
2601 unsigned int shift = mc->shift;
2602 unsigned int rshift = mc->rshift;
2604 unsigned int mask = (1 << fls(max)) - 1;
2605 unsigned int invert = mc->invert;
2606 unsigned int val, val2, val_mask;
2608 val = (ucontrol->value.integer.value[0] & mask);
2611 val_mask = mask << shift;
2613 if (shift != rshift) {
2614 val2 = (ucontrol->value.integer.value[1] & mask);
2617 val_mask |= mask << rshift;
2618 val |= val2 << rshift;
2620 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2622 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2625 * snd_soc_info_volsw_2r - double mixer info callback
2626 * @kcontrol: mixer control
2627 * @uinfo: control element information
2629 * Callback to provide information about a double mixer control that
2630 * spans 2 codec registers.
2632 * Returns 0 for success.
2634 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2635 struct snd_ctl_elem_info *uinfo)
2637 struct soc_mixer_control *mc =
2638 (struct soc_mixer_control *)kcontrol->private_value;
2641 if (!mc->platform_max)
2642 mc->platform_max = mc->max;
2643 platform_max = mc->platform_max;
2645 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2646 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2648 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2651 uinfo->value.integer.min = 0;
2652 uinfo->value.integer.max = platform_max;
2655 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2658 * snd_soc_get_volsw_2r - double mixer get callback
2659 * @kcontrol: mixer control
2660 * @ucontrol: control element information
2662 * Callback to get the value of a double mixer control that spans 2 registers.
2664 * Returns 0 for success.
2666 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2667 struct snd_ctl_elem_value *ucontrol)
2669 struct soc_mixer_control *mc =
2670 (struct soc_mixer_control *)kcontrol->private_value;
2671 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2672 unsigned int reg = mc->reg;
2673 unsigned int reg2 = mc->rreg;
2674 unsigned int shift = mc->shift;
2676 unsigned int mask = (1 << fls(max)) - 1;
2677 unsigned int invert = mc->invert;
2679 ucontrol->value.integer.value[0] =
2680 (snd_soc_read(codec, reg) >> shift) & mask;
2681 ucontrol->value.integer.value[1] =
2682 (snd_soc_read(codec, reg2) >> shift) & mask;
2684 ucontrol->value.integer.value[0] =
2685 max - ucontrol->value.integer.value[0];
2686 ucontrol->value.integer.value[1] =
2687 max - ucontrol->value.integer.value[1];
2692 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2695 * snd_soc_put_volsw_2r - double mixer set callback
2696 * @kcontrol: mixer control
2697 * @ucontrol: control element information
2699 * Callback to set the value of a double mixer control that spans 2 registers.
2701 * Returns 0 for success.
2703 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2704 struct snd_ctl_elem_value *ucontrol)
2706 struct soc_mixer_control *mc =
2707 (struct soc_mixer_control *)kcontrol->private_value;
2708 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2709 unsigned int reg = mc->reg;
2710 unsigned int reg2 = mc->rreg;
2711 unsigned int shift = mc->shift;
2713 unsigned int mask = (1 << fls(max)) - 1;
2714 unsigned int invert = mc->invert;
2716 unsigned int val, val2, val_mask;
2718 val_mask = mask << shift;
2719 val = (ucontrol->value.integer.value[0] & mask);
2720 val2 = (ucontrol->value.integer.value[1] & mask);
2728 val2 = val2 << shift;
2730 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2734 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2737 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2740 * snd_soc_info_volsw_s8 - signed mixer info callback
2741 * @kcontrol: mixer control
2742 * @uinfo: control element information
2744 * Callback to provide information about a signed mixer control.
2746 * Returns 0 for success.
2748 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2749 struct snd_ctl_elem_info *uinfo)
2751 struct soc_mixer_control *mc =
2752 (struct soc_mixer_control *)kcontrol->private_value;
2756 if (!mc->platform_max)
2757 mc->platform_max = mc->max;
2758 platform_max = mc->platform_max;
2760 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2762 uinfo->value.integer.min = 0;
2763 uinfo->value.integer.max = platform_max - min;
2766 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2769 * snd_soc_get_volsw_s8 - signed mixer get callback
2770 * @kcontrol: mixer control
2771 * @ucontrol: control element information
2773 * Callback to get the value of a signed mixer control.
2775 * Returns 0 for success.
2777 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2778 struct snd_ctl_elem_value *ucontrol)
2780 struct soc_mixer_control *mc =
2781 (struct soc_mixer_control *)kcontrol->private_value;
2782 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2783 unsigned int reg = mc->reg;
2785 int val = snd_soc_read(codec, reg);
2787 ucontrol->value.integer.value[0] =
2788 ((signed char)(val & 0xff))-min;
2789 ucontrol->value.integer.value[1] =
2790 ((signed char)((val >> 8) & 0xff))-min;
2793 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2796 * snd_soc_put_volsw_sgn - signed mixer put callback
2797 * @kcontrol: mixer control
2798 * @ucontrol: control element information
2800 * Callback to set the value of a signed mixer control.
2802 * Returns 0 for success.
2804 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2805 struct snd_ctl_elem_value *ucontrol)
2807 struct soc_mixer_control *mc =
2808 (struct soc_mixer_control *)kcontrol->private_value;
2809 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2810 unsigned int reg = mc->reg;
2814 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2815 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2817 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2819 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2822 * snd_soc_limit_volume - Set new limit to an existing volume control.
2824 * @codec: where to look for the control
2825 * @name: Name of the control
2826 * @max: new maximum limit
2828 * Return 0 for success, else error.
2830 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2831 const char *name, int max)
2833 struct snd_card *card = codec->card->snd_card;
2834 struct snd_kcontrol *kctl;
2835 struct soc_mixer_control *mc;
2839 /* Sanity check for name and max */
2840 if (unlikely(!name || max <= 0))
2843 list_for_each_entry(kctl, &card->controls, list) {
2844 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2850 mc = (struct soc_mixer_control *)kctl->private_value;
2851 if (max <= mc->max) {
2852 mc->platform_max = max;
2858 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2861 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2862 * mixer info callback
2863 * @kcontrol: mixer control
2864 * @uinfo: control element information
2866 * Returns 0 for success.
2868 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2869 struct snd_ctl_elem_info *uinfo)
2871 struct soc_mixer_control *mc =
2872 (struct soc_mixer_control *)kcontrol->private_value;
2876 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2878 uinfo->value.integer.min = 0;
2879 uinfo->value.integer.max = max-min;
2883 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2886 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2887 * mixer get callback
2888 * @kcontrol: mixer control
2889 * @uinfo: control element information
2891 * Returns 0 for success.
2893 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2894 struct snd_ctl_elem_value *ucontrol)
2896 struct soc_mixer_control *mc =
2897 (struct soc_mixer_control *)kcontrol->private_value;
2898 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2899 unsigned int mask = (1<<mc->shift)-1;
2901 int val = snd_soc_read(codec, mc->reg) & mask;
2902 int valr = snd_soc_read(codec, mc->rreg) & mask;
2904 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2905 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2908 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2911 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2912 * mixer put callback
2913 * @kcontrol: mixer control
2914 * @uinfo: control element information
2916 * Returns 0 for success.
2918 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2919 struct snd_ctl_elem_value *ucontrol)
2921 struct soc_mixer_control *mc =
2922 (struct soc_mixer_control *)kcontrol->private_value;
2923 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2924 unsigned int mask = (1<<mc->shift)-1;
2927 unsigned int val, valr, oval, ovalr;
2929 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2931 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2934 oval = snd_soc_read(codec, mc->reg) & mask;
2935 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2939 ret = snd_soc_write(codec, mc->reg, val);
2943 if (ovalr != valr) {
2944 ret = snd_soc_write(codec, mc->rreg, valr);
2951 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2954 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2956 * @clk_id: DAI specific clock ID
2957 * @freq: new clock frequency in Hz
2958 * @dir: new clock direction - input/output.
2960 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2962 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2963 unsigned int freq, int dir)
2965 if (dai->driver && dai->driver->ops->set_sysclk)
2966 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2970 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2973 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2975 * @div_id: DAI specific clock divider ID
2976 * @div: new clock divisor.
2978 * Configures the clock dividers. This is used to derive the best DAI bit and
2979 * frame clocks from the system or master clock. It's best to set the DAI bit
2980 * and frame clocks as low as possible to save system power.
2982 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2983 int div_id, int div)
2985 if (dai->driver && dai->driver->ops->set_clkdiv)
2986 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2990 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2993 * snd_soc_dai_set_pll - configure DAI PLL.
2995 * @pll_id: DAI specific PLL ID
2996 * @source: DAI specific source for the PLL
2997 * @freq_in: PLL input clock frequency in Hz
2998 * @freq_out: requested PLL output clock frequency in Hz
3000 * Configures and enables PLL to generate output clock based on input clock.
3002 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3003 unsigned int freq_in, unsigned int freq_out)
3005 if (dai->driver && dai->driver->ops->set_pll)
3006 return dai->driver->ops->set_pll(dai, pll_id, source,
3011 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3014 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3016 * @fmt: SND_SOC_DAIFMT_ format value.
3018 * Configures the DAI hardware format and clocking.
3020 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3022 if (dai->driver && dai->driver->ops->set_fmt)
3023 return dai->driver->ops->set_fmt(dai, fmt);
3027 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3030 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3032 * @tx_mask: bitmask representing active TX slots.
3033 * @rx_mask: bitmask representing active RX slots.
3034 * @slots: Number of slots in use.
3035 * @slot_width: Width in bits for each slot.
3037 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3040 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3041 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3043 if (dai->driver && dai->driver->ops->set_tdm_slot)
3044 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3049 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3052 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3054 * @tx_num: how many TX channels
3055 * @tx_slot: pointer to an array which imply the TX slot number channel
3057 * @rx_num: how many RX channels
3058 * @rx_slot: pointer to an array which imply the RX slot number channel
3061 * configure the relationship between channel number and TDM slot number.
3063 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3064 unsigned int tx_num, unsigned int *tx_slot,
3065 unsigned int rx_num, unsigned int *rx_slot)
3067 if (dai->driver && dai->driver->ops->set_channel_map)
3068 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3073 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3076 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3078 * @tristate: tristate enable
3080 * Tristates the DAI so that others can use it.
3082 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3084 if (dai->driver && dai->driver->ops->set_tristate)
3085 return dai->driver->ops->set_tristate(dai, tristate);
3089 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3092 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3094 * @mute: mute enable
3096 * Mutes the DAI DAC.
3098 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3100 if (dai->driver && dai->driver->ops->digital_mute)
3101 return dai->driver->ops->digital_mute(dai, mute);
3105 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3108 * snd_soc_register_card - Register a card with the ASoC core
3110 * @card: Card to register
3113 int snd_soc_register_card(struct snd_soc_card *card)
3117 if (!card->name || !card->dev)
3120 soc_init_card_debugfs(card);
3122 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3123 (card->num_links + card->num_aux_devs),
3125 if (card->rtd == NULL)
3127 card->rtd_aux = &card->rtd[card->num_links];
3129 for (i = 0; i < card->num_links; i++)
3130 card->rtd[i].dai_link = &card->dai_link[i];
3132 INIT_LIST_HEAD(&card->list);
3133 card->instantiated = 0;
3134 mutex_init(&card->mutex);
3136 mutex_lock(&client_mutex);
3137 list_add(&card->list, &card_list);
3138 snd_soc_instantiate_cards();
3139 mutex_unlock(&client_mutex);
3141 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3145 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3148 * snd_soc_unregister_card - Unregister a card with the ASoC core
3150 * @card: Card to unregister
3153 int snd_soc_unregister_card(struct snd_soc_card *card)
3155 if (card->instantiated)
3156 soc_cleanup_card_resources(card);
3157 mutex_lock(&client_mutex);
3158 list_del(&card->list);
3159 mutex_unlock(&client_mutex);
3160 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3164 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3167 * Simplify DAI link configuration by removing ".-1" from device names
3168 * and sanitizing names.
3170 static char *fmt_single_name(struct device *dev, int *id)
3172 char *found, name[NAME_SIZE];
3175 if (dev_name(dev) == NULL)
3178 strlcpy(name, dev_name(dev), NAME_SIZE);
3180 /* are we a "%s.%d" name (platform and SPI components) */
3181 found = strstr(name, dev->driver->name);
3184 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3186 /* discard ID from name if ID == -1 */
3188 found[strlen(dev->driver->name)] = '\0';
3192 /* I2C component devices are named "bus-addr" */
3193 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3194 char tmp[NAME_SIZE];
3196 /* create unique ID number from I2C addr and bus */
3197 *id = ((id1 & 0xffff) << 16) + id2;
3199 /* sanitize component name for DAI link creation */
3200 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3201 strlcpy(name, tmp, NAME_SIZE);
3206 return kstrdup(name, GFP_KERNEL);
3210 * Simplify DAI link naming for single devices with multiple DAIs by removing
3211 * any ".-1" and using the DAI name (instead of device name).
3213 static inline char *fmt_multiple_name(struct device *dev,
3214 struct snd_soc_dai_driver *dai_drv)
3216 if (dai_drv->name == NULL) {
3217 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3222 return kstrdup(dai_drv->name, GFP_KERNEL);
3226 * snd_soc_register_dai - Register a DAI with the ASoC core
3228 * @dai: DAI to register
3230 int snd_soc_register_dai(struct device *dev,
3231 struct snd_soc_dai_driver *dai_drv)
3233 struct snd_soc_dai *dai;
3235 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3237 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3241 /* create DAI component name */
3242 dai->name = fmt_single_name(dev, &dai->id);
3243 if (dai->name == NULL) {
3249 dai->driver = dai_drv;
3250 if (!dai->driver->ops)
3251 dai->driver->ops = &null_dai_ops;
3253 mutex_lock(&client_mutex);
3254 list_add(&dai->list, &dai_list);
3255 snd_soc_instantiate_cards();
3256 mutex_unlock(&client_mutex);
3258 pr_debug("Registered DAI '%s'\n", dai->name);
3262 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3265 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3267 * @dai: DAI to unregister
3269 void snd_soc_unregister_dai(struct device *dev)
3271 struct snd_soc_dai *dai;
3273 list_for_each_entry(dai, &dai_list, list) {
3274 if (dev == dai->dev)
3280 mutex_lock(&client_mutex);
3281 list_del(&dai->list);
3282 mutex_unlock(&client_mutex);
3284 pr_debug("Unregistered DAI '%s'\n", dai->name);
3288 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3291 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3293 * @dai: Array of DAIs to register
3294 * @count: Number of DAIs
3296 int snd_soc_register_dais(struct device *dev,
3297 struct snd_soc_dai_driver *dai_drv, size_t count)
3299 struct snd_soc_dai *dai;
3302 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3304 for (i = 0; i < count; i++) {
3306 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3312 /* create DAI component name */
3313 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3314 if (dai->name == NULL) {
3321 dai->driver = &dai_drv[i];
3322 if (dai->driver->id)
3323 dai->id = dai->driver->id;
3326 if (!dai->driver->ops)
3327 dai->driver->ops = &null_dai_ops;
3329 mutex_lock(&client_mutex);
3330 list_add(&dai->list, &dai_list);
3331 mutex_unlock(&client_mutex);
3333 pr_debug("Registered DAI '%s'\n", dai->name);
3336 mutex_lock(&client_mutex);
3337 snd_soc_instantiate_cards();
3338 mutex_unlock(&client_mutex);
3342 for (i--; i >= 0; i--)
3343 snd_soc_unregister_dai(dev);
3347 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3350 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3352 * @dai: Array of DAIs to unregister
3353 * @count: Number of DAIs
3355 void snd_soc_unregister_dais(struct device *dev, size_t count)
3359 for (i = 0; i < count; i++)
3360 snd_soc_unregister_dai(dev);
3362 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3365 * snd_soc_register_platform - Register a platform with the ASoC core
3367 * @platform: platform to register
3369 int snd_soc_register_platform(struct device *dev,
3370 struct snd_soc_platform_driver *platform_drv)
3372 struct snd_soc_platform *platform;
3374 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3376 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3377 if (platform == NULL)
3380 /* create platform component name */
3381 platform->name = fmt_single_name(dev, &platform->id);
3382 if (platform->name == NULL) {
3387 platform->dev = dev;
3388 platform->driver = platform_drv;
3390 mutex_lock(&client_mutex);
3391 list_add(&platform->list, &platform_list);
3392 snd_soc_instantiate_cards();
3393 mutex_unlock(&client_mutex);
3395 pr_debug("Registered platform '%s'\n", platform->name);
3399 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3402 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3404 * @platform: platform to unregister
3406 void snd_soc_unregister_platform(struct device *dev)
3408 struct snd_soc_platform *platform;
3410 list_for_each_entry(platform, &platform_list, list) {
3411 if (dev == platform->dev)
3417 mutex_lock(&client_mutex);
3418 list_del(&platform->list);
3419 mutex_unlock(&client_mutex);
3421 pr_debug("Unregistered platform '%s'\n", platform->name);
3422 kfree(platform->name);
3425 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3427 static u64 codec_format_map[] = {
3428 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3429 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3430 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3431 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3432 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3433 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3434 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3435 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3436 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3437 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3438 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3439 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3440 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3441 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3442 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3443 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3446 /* Fix up the DAI formats for endianness: codecs don't actually see
3447 * the endianness of the data but we're using the CPU format
3448 * definitions which do need to include endianness so we ensure that
3449 * codec DAIs always have both big and little endian variants set.
3451 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3455 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3456 if (stream->formats & codec_format_map[i])
3457 stream->formats |= codec_format_map[i];
3461 * snd_soc_register_codec - Register a codec with the ASoC core
3463 * @codec: codec to register
3465 int snd_soc_register_codec(struct device *dev,
3466 const struct snd_soc_codec_driver *codec_drv,
3467 struct snd_soc_dai_driver *dai_drv,
3471 struct snd_soc_codec *codec;
3474 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3476 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3480 /* create CODEC component name */
3481 codec->name = fmt_single_name(dev, &codec->id);
3482 if (codec->name == NULL) {
3487 if (codec_drv->compress_type)
3488 codec->compress_type = codec_drv->compress_type;
3490 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3492 codec->write = codec_drv->write;
3493 codec->read = codec_drv->read;
3494 codec->volatile_register = codec_drv->volatile_register;
3495 codec->readable_register = codec_drv->readable_register;
3496 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3497 codec->dapm.dev = dev;
3498 codec->dapm.codec = codec;
3500 codec->driver = codec_drv;
3501 codec->num_dai = num_dai;
3502 mutex_init(&codec->mutex);
3504 /* allocate CODEC register cache */
3505 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3506 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3507 codec->reg_size = reg_size;
3508 /* it is necessary to make a copy of the default register cache
3509 * because in the case of using a compression type that requires
3510 * the default register cache to be marked as __devinitconst the
3511 * kernel might have freed the array by the time we initialize
3514 if (codec_drv->reg_cache_default) {
3515 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3516 reg_size, GFP_KERNEL);
3517 if (!codec->reg_def_copy) {
3524 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3525 if (!codec->volatile_register)
3526 codec->volatile_register = snd_soc_default_volatile_register;
3527 if (!codec->readable_register)
3528 codec->readable_register = snd_soc_default_readable_register;
3531 for (i = 0; i < num_dai; i++) {
3532 fixup_codec_formats(&dai_drv[i].playback);
3533 fixup_codec_formats(&dai_drv[i].capture);
3536 /* register any DAIs */
3538 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3543 mutex_lock(&client_mutex);
3544 list_add(&codec->list, &codec_list);
3545 snd_soc_instantiate_cards();
3546 mutex_unlock(&client_mutex);
3548 pr_debug("Registered codec '%s'\n", codec->name);
3552 kfree(codec->reg_def_copy);
3553 codec->reg_def_copy = NULL;
3558 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3561 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3563 * @codec: codec to unregister
3565 void snd_soc_unregister_codec(struct device *dev)
3567 struct snd_soc_codec *codec;
3570 list_for_each_entry(codec, &codec_list, list) {
3571 if (dev == codec->dev)
3578 for (i = 0; i < codec->num_dai; i++)
3579 snd_soc_unregister_dai(dev);
3581 mutex_lock(&client_mutex);
3582 list_del(&codec->list);
3583 mutex_unlock(&client_mutex);
3585 pr_debug("Unregistered codec '%s'\n", codec->name);
3587 snd_soc_cache_exit(codec);
3588 kfree(codec->reg_def_copy);
3592 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3594 static int __init snd_soc_init(void)
3596 #ifdef CONFIG_DEBUG_FS
3597 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3598 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3600 "ASoC: Failed to create debugfs directory\n");
3601 snd_soc_debugfs_root = NULL;
3604 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3606 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3608 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3610 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3612 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3613 &platform_list_fops))
3614 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3617 return platform_driver_register(&soc_driver);
3619 module_init(snd_soc_init);
3621 static void __exit snd_soc_exit(void)
3623 #ifdef CONFIG_DEBUG_FS
3624 debugfs_remove_recursive(snd_soc_debugfs_root);
3626 platform_driver_unregister(&soc_driver);
3628 module_exit(snd_soc_exit);
3630 /* Module information */
3631 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3632 MODULE_DESCRIPTION("ALSA SoC Core");
3633 MODULE_LICENSE("GPL");
3634 MODULE_ALIAS("platform:soc-audio");