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 snd_soc_register_card(struct snd_soc_card *card);
62 static int snd_soc_unregister_card(struct snd_soc_card *card);
63 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
66 * This is a timeout to do a DAPM powerdown after a stream is closed().
67 * It can be used to eliminate pops between different playback streams, e.g.
68 * between two audio tracks.
70 static int pmdown_time = 5000;
71 module_param(pmdown_time, int, 0);
72 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
74 /* codec register dump */
75 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
77 int ret, i, step = 1, count = 0;
79 if (!codec->driver->reg_cache_size)
82 if (codec->driver->reg_cache_step)
83 step = codec->driver->reg_cache_step;
85 count += sprintf(buf, "%s registers\n", codec->name);
86 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
87 if (codec->driver->readable_register && !codec->driver->readable_register(i))
90 count += sprintf(buf + count, "%2x: ", i);
91 if (count >= PAGE_SIZE - 1)
94 if (codec->driver->display_register) {
95 count += codec->driver->display_register(codec, buf + count,
96 PAGE_SIZE - count, i);
98 /* If the read fails it's almost certainly due to
99 * the register being volatile and the device being
102 ret = snd_soc_read(codec, i);
104 count += snprintf(buf + count,
108 count += snprintf(buf + count,
110 "<no data: %d>", ret);
113 if (count >= PAGE_SIZE - 1)
116 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
117 if (count >= PAGE_SIZE - 1)
121 /* Truncate count; min() would cause a warning */
122 if (count >= PAGE_SIZE)
123 count = PAGE_SIZE - 1;
127 static ssize_t codec_reg_show(struct device *dev,
128 struct device_attribute *attr, char *buf)
130 struct snd_soc_pcm_runtime *rtd =
131 container_of(dev, struct snd_soc_pcm_runtime, dev);
133 return soc_codec_reg_show(rtd->codec, buf);
136 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
138 static ssize_t pmdown_time_show(struct device *dev,
139 struct device_attribute *attr, char *buf)
141 struct snd_soc_pcm_runtime *rtd =
142 container_of(dev, struct snd_soc_pcm_runtime, dev);
144 return sprintf(buf, "%ld\n", rtd->pmdown_time);
147 static ssize_t pmdown_time_set(struct device *dev,
148 struct device_attribute *attr,
149 const char *buf, size_t count)
151 struct snd_soc_pcm_runtime *rtd =
152 container_of(dev, struct snd_soc_pcm_runtime, dev);
155 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
162 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
164 #ifdef CONFIG_DEBUG_FS
165 static int codec_reg_open_file(struct inode *inode, struct file *file)
167 file->private_data = inode->i_private;
171 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
172 size_t count, loff_t *ppos)
175 struct snd_soc_codec *codec = file->private_data;
176 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
179 ret = soc_codec_reg_show(codec, buf);
181 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
186 static ssize_t codec_reg_write_file(struct file *file,
187 const char __user *user_buf, size_t count, loff_t *ppos)
192 unsigned long reg, value;
194 struct snd_soc_codec *codec = file->private_data;
196 buf_size = min(count, (sizeof(buf)-1));
197 if (copy_from_user(buf, user_buf, buf_size))
201 if (codec->driver->reg_cache_step)
202 step = codec->driver->reg_cache_step;
204 while (*start == ' ')
206 reg = simple_strtoul(start, &start, 16);
207 if ((reg >= codec->driver->reg_cache_size) || (reg % step))
209 while (*start == ' ')
211 if (strict_strtoul(start, 16, &value))
214 /* Userspace has been fiddling around behind the kernel's back */
215 add_taint(TAINT_USER);
217 snd_soc_write(codec, reg, value);
221 static const struct file_operations codec_reg_fops = {
222 .open = codec_reg_open_file,
223 .read = codec_reg_read_file,
224 .write = codec_reg_write_file,
225 .llseek = default_llseek,
228 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
230 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
232 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
234 if (!codec->debugfs_codec_root) {
236 "ASoC: Failed to create codec debugfs directory\n");
240 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
241 codec->debugfs_codec_root,
242 codec, &codec_reg_fops);
243 if (!codec->debugfs_reg)
245 "ASoC: Failed to create codec register debugfs file\n");
247 codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
248 codec->debugfs_codec_root);
249 if (!codec->dapm.debugfs_dapm)
251 "Failed to create DAPM debugfs directory\n");
253 snd_soc_dapm_debugfs_init(&codec->dapm);
256 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
258 debugfs_remove_recursive(codec->debugfs_codec_root);
261 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
262 size_t count, loff_t *ppos)
264 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
265 ssize_t len, ret = 0;
266 struct snd_soc_codec *codec;
271 list_for_each_entry(codec, &codec_list, list) {
272 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
276 if (ret > PAGE_SIZE) {
283 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
290 static const struct file_operations codec_list_fops = {
291 .read = codec_list_read_file,
292 .llseek = default_llseek,/* read accesses f_pos */
295 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
296 size_t count, loff_t *ppos)
298 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
299 ssize_t len, ret = 0;
300 struct snd_soc_dai *dai;
305 list_for_each_entry(dai, &dai_list, list) {
306 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
309 if (ret > PAGE_SIZE) {
315 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
322 static const struct file_operations dai_list_fops = {
323 .read = dai_list_read_file,
324 .llseek = default_llseek,/* read accesses f_pos */
327 static ssize_t platform_list_read_file(struct file *file,
328 char __user *user_buf,
329 size_t count, loff_t *ppos)
331 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
332 ssize_t len, ret = 0;
333 struct snd_soc_platform *platform;
338 list_for_each_entry(platform, &platform_list, list) {
339 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
343 if (ret > PAGE_SIZE) {
349 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
356 static const struct file_operations platform_list_fops = {
357 .read = platform_list_read_file,
358 .llseek = default_llseek,/* read accesses f_pos */
361 static void soc_init_card_debugfs(struct snd_soc_card *card)
363 card->debugfs_card_root = debugfs_create_dir(card->name,
364 snd_soc_debugfs_root);
365 if (!card->debugfs_card_root) {
367 "ASoC: Failed to create codec debugfs directory\n");
371 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
372 card->debugfs_card_root,
374 if (!card->debugfs_pop_time)
376 "Failed to create pop time debugfs file\n");
379 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
381 debugfs_remove_recursive(card->debugfs_card_root);
386 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
390 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
394 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
398 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
403 #ifdef CONFIG_SND_SOC_AC97_BUS
404 /* unregister ac97 codec */
405 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
407 if (codec->ac97->dev.bus)
408 device_unregister(&codec->ac97->dev);
412 /* stop no dev release warning */
413 static void soc_ac97_device_release(struct device *dev){}
415 /* register ac97 codec to bus */
416 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
420 codec->ac97->dev.bus = &ac97_bus_type;
421 codec->ac97->dev.parent = codec->card->dev;
422 codec->ac97->dev.release = soc_ac97_device_release;
424 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
425 codec->card->snd_card->number, 0, codec->name);
426 err = device_register(&codec->ac97->dev);
428 snd_printk(KERN_ERR "Can't register ac97 bus\n");
429 codec->ac97->dev.bus = NULL;
436 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
438 struct snd_soc_pcm_runtime *rtd = substream->private_data;
439 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
440 struct snd_soc_dai *codec_dai = rtd->codec_dai;
443 if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
444 rtd->dai_link->symmetric_rates) {
445 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
448 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
449 SNDRV_PCM_HW_PARAM_RATE,
454 "Unable to apply rate symmetry constraint: %d\n", ret);
463 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
464 * then initialized and any private data can be allocated. This also calls
465 * startup for the cpu DAI, platform, machine and codec DAI.
467 static int soc_pcm_open(struct snd_pcm_substream *substream)
469 struct snd_soc_pcm_runtime *rtd = substream->private_data;
470 struct snd_pcm_runtime *runtime = substream->runtime;
471 struct snd_soc_platform *platform = rtd->platform;
472 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
473 struct snd_soc_dai *codec_dai = rtd->codec_dai;
474 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
475 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
478 mutex_lock(&pcm_mutex);
480 /* startup the audio subsystem */
481 if (cpu_dai->driver->ops->startup) {
482 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
484 printk(KERN_ERR "asoc: can't open interface %s\n",
490 if (platform->driver->ops->open) {
491 ret = platform->driver->ops->open(substream);
493 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
498 if (codec_dai->driver->ops->startup) {
499 ret = codec_dai->driver->ops->startup(substream, codec_dai);
501 printk(KERN_ERR "asoc: can't open codec %s\n",
507 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
508 ret = rtd->dai_link->ops->startup(substream);
510 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
515 /* Check that the codec and cpu DAIs are compatible */
516 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
517 runtime->hw.rate_min =
518 max(codec_dai_drv->playback.rate_min,
519 cpu_dai_drv->playback.rate_min);
520 runtime->hw.rate_max =
521 min(codec_dai_drv->playback.rate_max,
522 cpu_dai_drv->playback.rate_max);
523 runtime->hw.channels_min =
524 max(codec_dai_drv->playback.channels_min,
525 cpu_dai_drv->playback.channels_min);
526 runtime->hw.channels_max =
527 min(codec_dai_drv->playback.channels_max,
528 cpu_dai_drv->playback.channels_max);
529 runtime->hw.formats =
530 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
532 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
533 if (codec_dai_drv->playback.rates
534 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
535 runtime->hw.rates |= cpu_dai_drv->playback.rates;
536 if (cpu_dai_drv->playback.rates
537 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
538 runtime->hw.rates |= codec_dai_drv->playback.rates;
540 runtime->hw.rate_min =
541 max(codec_dai_drv->capture.rate_min,
542 cpu_dai_drv->capture.rate_min);
543 runtime->hw.rate_max =
544 min(codec_dai_drv->capture.rate_max,
545 cpu_dai_drv->capture.rate_max);
546 runtime->hw.channels_min =
547 max(codec_dai_drv->capture.channels_min,
548 cpu_dai_drv->capture.channels_min);
549 runtime->hw.channels_max =
550 min(codec_dai_drv->capture.channels_max,
551 cpu_dai_drv->capture.channels_max);
552 runtime->hw.formats =
553 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
555 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
556 if (codec_dai_drv->capture.rates
557 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
558 runtime->hw.rates |= cpu_dai_drv->capture.rates;
559 if (cpu_dai_drv->capture.rates
560 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
561 runtime->hw.rates |= codec_dai_drv->capture.rates;
564 snd_pcm_limit_hw_rates(runtime);
565 if (!runtime->hw.rates) {
566 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
567 codec_dai->name, cpu_dai->name);
570 if (!runtime->hw.formats) {
571 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
572 codec_dai->name, cpu_dai->name);
575 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
576 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
577 codec_dai->name, cpu_dai->name);
581 /* Symmetry only applies if we've already got an active stream. */
582 if (cpu_dai->active || codec_dai->active) {
583 ret = soc_pcm_apply_symmetry(substream);
588 pr_debug("asoc: %s <-> %s info:\n",
589 codec_dai->name, cpu_dai->name);
590 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
591 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
592 runtime->hw.channels_max);
593 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
594 runtime->hw.rate_max);
596 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
597 cpu_dai->playback_active++;
598 codec_dai->playback_active++;
600 cpu_dai->capture_active++;
601 codec_dai->capture_active++;
605 rtd->codec->active++;
606 mutex_unlock(&pcm_mutex);
610 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
611 rtd->dai_link->ops->shutdown(substream);
614 if (codec_dai->driver->ops->shutdown)
615 codec_dai->driver->ops->shutdown(substream, codec_dai);
618 if (platform->driver->ops->close)
619 platform->driver->ops->close(substream);
622 if (cpu_dai->driver->ops->shutdown)
623 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
625 mutex_unlock(&pcm_mutex);
630 * Power down the audio subsystem pmdown_time msecs after close is called.
631 * This is to ensure there are no pops or clicks in between any music tracks
632 * due to DAPM power cycling.
634 static void close_delayed_work(struct work_struct *work)
636 struct snd_soc_pcm_runtime *rtd =
637 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
638 struct snd_soc_dai *codec_dai = rtd->codec_dai;
640 mutex_lock(&pcm_mutex);
642 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
643 codec_dai->driver->playback.stream_name,
644 codec_dai->playback_active ? "active" : "inactive",
645 codec_dai->pop_wait ? "yes" : "no");
647 /* are we waiting on this codec DAI stream */
648 if (codec_dai->pop_wait == 1) {
649 codec_dai->pop_wait = 0;
650 snd_soc_dapm_stream_event(rtd,
651 codec_dai->driver->playback.stream_name,
652 SND_SOC_DAPM_STREAM_STOP);
655 mutex_unlock(&pcm_mutex);
659 * Called by ALSA when a PCM substream is closed. Private data can be
660 * freed here. The cpu DAI, codec DAI, machine and platform are also
663 static int soc_codec_close(struct snd_pcm_substream *substream)
665 struct snd_soc_pcm_runtime *rtd = substream->private_data;
666 struct snd_soc_platform *platform = rtd->platform;
667 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
668 struct snd_soc_dai *codec_dai = rtd->codec_dai;
669 struct snd_soc_codec *codec = rtd->codec;
671 mutex_lock(&pcm_mutex);
673 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
674 cpu_dai->playback_active--;
675 codec_dai->playback_active--;
677 cpu_dai->capture_active--;
678 codec_dai->capture_active--;
685 /* Muting the DAC suppresses artifacts caused during digital
686 * shutdown, for example from stopping clocks.
688 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
689 snd_soc_dai_digital_mute(codec_dai, 1);
691 if (cpu_dai->driver->ops->shutdown)
692 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
694 if (codec_dai->driver->ops->shutdown)
695 codec_dai->driver->ops->shutdown(substream, codec_dai);
697 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
698 rtd->dai_link->ops->shutdown(substream);
700 if (platform->driver->ops->close)
701 platform->driver->ops->close(substream);
702 cpu_dai->runtime = NULL;
704 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
705 /* start delayed pop wq here for playback streams */
706 codec_dai->pop_wait = 1;
707 schedule_delayed_work(&rtd->delayed_work,
708 msecs_to_jiffies(rtd->pmdown_time));
710 /* capture streams can be powered down now */
711 snd_soc_dapm_stream_event(rtd,
712 codec_dai->driver->capture.stream_name,
713 SND_SOC_DAPM_STREAM_STOP);
716 mutex_unlock(&pcm_mutex);
721 * Called by ALSA when the PCM substream is prepared, can set format, sample
722 * rate, etc. This function is non atomic and can be called multiple times,
723 * it can refer to the runtime info.
725 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
727 struct snd_soc_pcm_runtime *rtd = substream->private_data;
728 struct snd_soc_platform *platform = rtd->platform;
729 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
730 struct snd_soc_dai *codec_dai = rtd->codec_dai;
733 mutex_lock(&pcm_mutex);
735 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
736 ret = rtd->dai_link->ops->prepare(substream);
738 printk(KERN_ERR "asoc: machine prepare error\n");
743 if (platform->driver->ops->prepare) {
744 ret = platform->driver->ops->prepare(substream);
746 printk(KERN_ERR "asoc: platform prepare error\n");
751 if (codec_dai->driver->ops->prepare) {
752 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
754 printk(KERN_ERR "asoc: codec DAI prepare error\n");
759 if (cpu_dai->driver->ops->prepare) {
760 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
762 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
767 /* cancel any delayed stream shutdown that is pending */
768 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
769 codec_dai->pop_wait) {
770 codec_dai->pop_wait = 0;
771 cancel_delayed_work(&rtd->delayed_work);
774 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
775 snd_soc_dapm_stream_event(rtd,
776 codec_dai->driver->playback.stream_name,
777 SND_SOC_DAPM_STREAM_START);
779 snd_soc_dapm_stream_event(rtd,
780 codec_dai->driver->capture.stream_name,
781 SND_SOC_DAPM_STREAM_START);
783 snd_soc_dai_digital_mute(codec_dai, 0);
786 mutex_unlock(&pcm_mutex);
791 * Called by ALSA when the hardware params are set by application. This
792 * function can also be called multiple times and can allocate buffers
793 * (using snd_pcm_lib_* ). It's non-atomic.
795 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
796 struct snd_pcm_hw_params *params)
798 struct snd_soc_pcm_runtime *rtd = substream->private_data;
799 struct snd_soc_platform *platform = rtd->platform;
800 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
801 struct snd_soc_dai *codec_dai = rtd->codec_dai;
804 mutex_lock(&pcm_mutex);
806 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
807 ret = rtd->dai_link->ops->hw_params(substream, params);
809 printk(KERN_ERR "asoc: machine hw_params failed\n");
814 if (codec_dai->driver->ops->hw_params) {
815 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
817 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
823 if (cpu_dai->driver->ops->hw_params) {
824 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
826 printk(KERN_ERR "asoc: interface %s hw params failed\n",
832 if (platform->driver->ops->hw_params) {
833 ret = platform->driver->ops->hw_params(substream, params);
835 printk(KERN_ERR "asoc: platform %s hw params failed\n",
841 rtd->rate = params_rate(params);
844 mutex_unlock(&pcm_mutex);
848 if (cpu_dai->driver->ops->hw_free)
849 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
852 if (codec_dai->driver->ops->hw_free)
853 codec_dai->driver->ops->hw_free(substream, codec_dai);
856 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
857 rtd->dai_link->ops->hw_free(substream);
859 mutex_unlock(&pcm_mutex);
864 * Frees resources allocated by hw_params, can be called multiple times
866 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
868 struct snd_soc_pcm_runtime *rtd = substream->private_data;
869 struct snd_soc_platform *platform = rtd->platform;
870 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
871 struct snd_soc_dai *codec_dai = rtd->codec_dai;
872 struct snd_soc_codec *codec = rtd->codec;
874 mutex_lock(&pcm_mutex);
876 /* apply codec digital mute */
878 snd_soc_dai_digital_mute(codec_dai, 1);
880 /* free any machine hw params */
881 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
882 rtd->dai_link->ops->hw_free(substream);
884 /* free any DMA resources */
885 if (platform->driver->ops->hw_free)
886 platform->driver->ops->hw_free(substream);
888 /* now free hw params for the DAIs */
889 if (codec_dai->driver->ops->hw_free)
890 codec_dai->driver->ops->hw_free(substream, codec_dai);
892 if (cpu_dai->driver->ops->hw_free)
893 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
895 mutex_unlock(&pcm_mutex);
899 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
901 struct snd_soc_pcm_runtime *rtd = substream->private_data;
902 struct snd_soc_platform *platform = rtd->platform;
903 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
904 struct snd_soc_dai *codec_dai = rtd->codec_dai;
907 if (codec_dai->driver->ops->trigger) {
908 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
913 if (platform->driver->ops->trigger) {
914 ret = platform->driver->ops->trigger(substream, cmd);
919 if (cpu_dai->driver->ops->trigger) {
920 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
928 * soc level wrapper for pointer callback
929 * If cpu_dai, codec_dai, platform driver has the delay callback, than
930 * the runtime->delay will be updated accordingly.
932 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
934 struct snd_soc_pcm_runtime *rtd = substream->private_data;
935 struct snd_soc_platform *platform = rtd->platform;
936 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
937 struct snd_soc_dai *codec_dai = rtd->codec_dai;
938 struct snd_pcm_runtime *runtime = substream->runtime;
939 snd_pcm_uframes_t offset = 0;
940 snd_pcm_sframes_t delay = 0;
942 if (platform->driver->ops->pointer)
943 offset = platform->driver->ops->pointer(substream);
945 if (cpu_dai->driver->ops->delay)
946 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
948 if (codec_dai->driver->ops->delay)
949 delay += codec_dai->driver->ops->delay(substream, codec_dai);
951 if (platform->driver->delay)
952 delay += platform->driver->delay(substream, codec_dai);
954 runtime->delay = delay;
959 /* ASoC PCM operations */
960 static struct snd_pcm_ops soc_pcm_ops = {
961 .open = soc_pcm_open,
962 .close = soc_codec_close,
963 .hw_params = soc_pcm_hw_params,
964 .hw_free = soc_pcm_hw_free,
965 .prepare = soc_pcm_prepare,
966 .trigger = soc_pcm_trigger,
967 .pointer = soc_pcm_pointer,
971 /* powers down audio subsystem for suspend */
972 static int soc_suspend(struct device *dev)
974 struct platform_device *pdev = to_platform_device(dev);
975 struct snd_soc_card *card = platform_get_drvdata(pdev);
976 struct snd_soc_codec *codec;
979 /* If the initialization of this soc device failed, there is no codec
980 * associated with it. Just bail out in this case.
982 if (list_empty(&card->codec_dev_list))
985 /* Due to the resume being scheduled into a workqueue we could
986 * suspend before that's finished - wait for it to complete.
988 snd_power_lock(card->snd_card);
989 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
990 snd_power_unlock(card->snd_card);
992 /* we're going to block userspace touching us until resume completes */
993 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
995 /* mute any active DACs */
996 for (i = 0; i < card->num_rtd; i++) {
997 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
998 struct snd_soc_dai_driver *drv = dai->driver;
1000 if (card->rtd[i].dai_link->ignore_suspend)
1003 if (drv->ops->digital_mute && dai->playback_active)
1004 drv->ops->digital_mute(dai, 1);
1007 /* suspend all pcms */
1008 for (i = 0; i < card->num_rtd; i++) {
1009 if (card->rtd[i].dai_link->ignore_suspend)
1012 snd_pcm_suspend_all(card->rtd[i].pcm);
1015 if (card->suspend_pre)
1016 card->suspend_pre(pdev, PMSG_SUSPEND);
1018 for (i = 0; i < card->num_rtd; i++) {
1019 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1020 struct snd_soc_platform *platform = card->rtd[i].platform;
1022 if (card->rtd[i].dai_link->ignore_suspend)
1025 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1026 cpu_dai->driver->suspend(cpu_dai);
1027 if (platform->driver->suspend && !platform->suspended) {
1028 platform->driver->suspend(cpu_dai);
1029 platform->suspended = 1;
1033 /* close any waiting streams and save state */
1034 for (i = 0; i < card->num_rtd; i++) {
1035 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1036 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1039 for (i = 0; i < card->num_rtd; i++) {
1040 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1042 if (card->rtd[i].dai_link->ignore_suspend)
1045 if (driver->playback.stream_name != NULL)
1046 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1047 SND_SOC_DAPM_STREAM_SUSPEND);
1049 if (driver->capture.stream_name != NULL)
1050 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1051 SND_SOC_DAPM_STREAM_SUSPEND);
1054 /* suspend all CODECs */
1055 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1056 /* If there are paths active then the CODEC will be held with
1057 * bias _ON and should not be suspended. */
1058 if (!codec->suspended && codec->driver->suspend) {
1059 switch (codec->dapm.bias_level) {
1060 case SND_SOC_BIAS_STANDBY:
1061 case SND_SOC_BIAS_OFF:
1062 codec->driver->suspend(codec, PMSG_SUSPEND);
1063 codec->suspended = 1;
1066 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1072 for (i = 0; i < card->num_rtd; i++) {
1073 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1075 if (card->rtd[i].dai_link->ignore_suspend)
1078 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1079 cpu_dai->driver->suspend(cpu_dai);
1082 if (card->suspend_post)
1083 card->suspend_post(pdev, PMSG_SUSPEND);
1088 /* deferred resume work, so resume can complete before we finished
1089 * setting our codec back up, which can be very slow on I2C
1091 static void soc_resume_deferred(struct work_struct *work)
1093 struct snd_soc_card *card =
1094 container_of(work, struct snd_soc_card, deferred_resume_work);
1095 struct platform_device *pdev = to_platform_device(card->dev);
1096 struct snd_soc_codec *codec;
1099 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1100 * so userspace apps are blocked from touching us
1103 dev_dbg(card->dev, "starting resume work\n");
1105 /* Bring us up into D2 so that DAPM starts enabling things */
1106 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1108 if (card->resume_pre)
1109 card->resume_pre(pdev);
1111 /* resume AC97 DAIs */
1112 for (i = 0; i < card->num_rtd; i++) {
1113 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1115 if (card->rtd[i].dai_link->ignore_suspend)
1118 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1119 cpu_dai->driver->resume(cpu_dai);
1122 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1123 /* If the CODEC was idle over suspend then it will have been
1124 * left with bias OFF or STANDBY and suspended so we must now
1125 * resume. Otherwise the suspend was suppressed.
1127 if (codec->driver->resume && codec->suspended) {
1128 switch (codec->dapm.bias_level) {
1129 case SND_SOC_BIAS_STANDBY:
1130 case SND_SOC_BIAS_OFF:
1131 codec->driver->resume(codec);
1132 codec->suspended = 0;
1135 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1141 for (i = 0; i < card->num_rtd; i++) {
1142 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1144 if (card->rtd[i].dai_link->ignore_suspend)
1147 if (driver->playback.stream_name != NULL)
1148 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1149 SND_SOC_DAPM_STREAM_RESUME);
1151 if (driver->capture.stream_name != NULL)
1152 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1153 SND_SOC_DAPM_STREAM_RESUME);
1156 /* unmute any active DACs */
1157 for (i = 0; i < card->num_rtd; i++) {
1158 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1159 struct snd_soc_dai_driver *drv = dai->driver;
1161 if (card->rtd[i].dai_link->ignore_suspend)
1164 if (drv->ops->digital_mute && dai->playback_active)
1165 drv->ops->digital_mute(dai, 0);
1168 for (i = 0; i < card->num_rtd; i++) {
1169 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1170 struct snd_soc_platform *platform = card->rtd[i].platform;
1172 if (card->rtd[i].dai_link->ignore_suspend)
1175 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1176 cpu_dai->driver->resume(cpu_dai);
1177 if (platform->driver->resume && platform->suspended) {
1178 platform->driver->resume(cpu_dai);
1179 platform->suspended = 0;
1183 if (card->resume_post)
1184 card->resume_post(pdev);
1186 dev_dbg(card->dev, "resume work completed\n");
1188 /* userspace can access us now we are back as we were before */
1189 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1192 /* powers up audio subsystem after a suspend */
1193 static int soc_resume(struct device *dev)
1195 struct platform_device *pdev = to_platform_device(dev);
1196 struct snd_soc_card *card = platform_get_drvdata(pdev);
1199 /* AC97 devices might have other drivers hanging off them so
1200 * need to resume immediately. Other drivers don't have that
1201 * problem and may take a substantial amount of time to resume
1202 * due to I/O costs and anti-pop so handle them out of line.
1204 for (i = 0; i < card->num_rtd; i++) {
1205 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1206 if (cpu_dai->driver->ac97_control) {
1207 dev_dbg(dev, "Resuming AC97 immediately\n");
1208 soc_resume_deferred(&card->deferred_resume_work);
1210 dev_dbg(dev, "Scheduling resume work\n");
1211 if (!schedule_work(&card->deferred_resume_work))
1212 dev_err(dev, "resume work item may be lost\n");
1219 #define soc_suspend NULL
1220 #define soc_resume NULL
1223 static struct snd_soc_dai_ops null_dai_ops = {
1226 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1228 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1229 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1230 struct snd_soc_codec *codec;
1231 struct snd_soc_platform *platform;
1232 struct snd_soc_dai *codec_dai, *cpu_dai;
1236 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1238 /* do we already have the CPU DAI for this link ? */
1242 /* no, then find CPU DAI from registered DAIs*/
1243 list_for_each_entry(cpu_dai, &dai_list, list) {
1244 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1246 if (!try_module_get(cpu_dai->dev->driver->owner))
1249 rtd->cpu_dai = cpu_dai;
1253 dev_dbg(card->dev, "CPU DAI %s not registered\n",
1254 dai_link->cpu_dai_name);
1257 /* do we already have the CODEC for this link ? */
1262 /* no, then find CODEC from registered CODECs*/
1263 list_for_each_entry(codec, &codec_list, list) {
1264 if (!strcmp(codec->name, dai_link->codec_name)) {
1267 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1268 list_for_each_entry(codec_dai, &dai_list, list) {
1269 if (codec->dev == codec_dai->dev &&
1270 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1271 rtd->codec_dai = codec_dai;
1275 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1276 dai_link->codec_dai_name);
1281 dev_dbg(card->dev, "CODEC %s not registered\n",
1282 dai_link->codec_name);
1285 /* do we already have the CODEC DAI for this link ? */
1286 if (rtd->platform) {
1289 /* no, then find CPU DAI from registered DAIs*/
1290 list_for_each_entry(platform, &platform_list, list) {
1291 if (!strcmp(platform->name, dai_link->platform_name)) {
1292 rtd->platform = platform;
1297 dev_dbg(card->dev, "platform %s not registered\n",
1298 dai_link->platform_name);
1302 /* mark rtd as complete if we found all 4 of our client devices */
1303 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1310 static void soc_remove_codec(struct snd_soc_codec *codec)
1314 if (codec->driver->remove) {
1315 err = codec->driver->remove(codec);
1318 "asoc: failed to remove %s: %d\n",
1322 /* Make sure all DAPM widgets are freed */
1323 snd_soc_dapm_free(&codec->dapm);
1325 soc_cleanup_codec_debugfs(codec);
1327 list_del(&codec->card_list);
1328 module_put(codec->dev->driver->owner);
1331 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1333 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1334 struct snd_soc_codec *codec = rtd->codec;
1335 struct snd_soc_platform *platform = rtd->platform;
1336 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1339 /* unregister the rtd device */
1340 if (rtd->dev_registered) {
1341 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1342 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1343 device_unregister(&rtd->dev);
1344 rtd->dev_registered = 0;
1347 /* remove the CODEC DAI */
1348 if (codec_dai && codec_dai->probed) {
1349 if (codec_dai->driver->remove) {
1350 err = codec_dai->driver->remove(codec_dai);
1352 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1354 codec_dai->probed = 0;
1355 list_del(&codec_dai->card_list);
1358 /* remove the platform */
1359 if (platform && platform->probed) {
1360 if (platform->driver->remove) {
1361 err = platform->driver->remove(platform);
1363 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1365 platform->probed = 0;
1366 list_del(&platform->card_list);
1367 module_put(platform->dev->driver->owner);
1370 /* remove the CODEC */
1371 if (codec && codec->probed)
1372 soc_remove_codec(codec);
1374 /* remove the cpu_dai */
1375 if (cpu_dai && cpu_dai->probed) {
1376 if (cpu_dai->driver->remove) {
1377 err = cpu_dai->driver->remove(cpu_dai);
1379 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1381 cpu_dai->probed = 0;
1382 list_del(&cpu_dai->card_list);
1383 module_put(cpu_dai->dev->driver->owner);
1387 static void soc_set_name_prefix(struct snd_soc_card *card,
1388 struct snd_soc_codec *codec)
1392 if (card->codec_conf == NULL)
1395 for (i = 0; i < card->num_configs; i++) {
1396 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1397 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1398 codec->name_prefix = map->name_prefix;
1404 static int soc_probe_codec(struct snd_soc_card *card,
1405 struct snd_soc_codec *codec)
1410 codec->dapm.card = card;
1411 soc_set_name_prefix(card, codec);
1413 if (codec->driver->probe) {
1414 ret = codec->driver->probe(codec);
1417 "asoc: failed to probe CODEC %s: %d\n",
1423 soc_init_codec_debugfs(codec);
1425 /* mark codec as probed and add to card codec list */
1426 if (!try_module_get(codec->dev->driver->owner))
1430 list_add(&codec->card_list, &card->codec_dev_list);
1431 list_add(&codec->dapm.list, &card->dapm_list);
1436 static void rtd_release(struct device *dev) {}
1438 static int soc_post_component_init(struct snd_soc_card *card,
1439 struct snd_soc_codec *codec,
1440 int num, int dailess)
1442 struct snd_soc_dai_link *dai_link = NULL;
1443 struct snd_soc_aux_dev *aux_dev = NULL;
1444 struct snd_soc_pcm_runtime *rtd;
1445 const char *temp, *name;
1449 dai_link = &card->dai_link[num];
1450 rtd = &card->rtd[num];
1451 name = dai_link->name;
1453 aux_dev = &card->aux_dev[num];
1454 rtd = &card->rtd_aux[num];
1455 name = aux_dev->name;
1458 /* machine controls, routes and widgets are not prefixed */
1459 temp = codec->name_prefix;
1460 codec->name_prefix = NULL;
1462 /* do machine specific initialization */
1463 if (!dailess && dai_link->init)
1464 ret = dai_link->init(rtd);
1465 else if (dailess && aux_dev->init)
1466 ret = aux_dev->init(&codec->dapm);
1468 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1471 codec->name_prefix = temp;
1473 /* Make sure all DAPM widgets are instantiated */
1474 snd_soc_dapm_new_widgets(&codec->dapm);
1475 snd_soc_dapm_sync(&codec->dapm);
1477 /* register the rtd device */
1480 rtd->dev.parent = card->dev;
1481 rtd->dev.release = rtd_release;
1482 rtd->dev.init_name = name;
1483 ret = device_register(&rtd->dev);
1486 "asoc: failed to register runtime device: %d\n", ret);
1489 rtd->dev_registered = 1;
1491 /* add DAPM sysfs entries for this codec */
1492 ret = snd_soc_dapm_sys_add(&rtd->dev);
1495 "asoc: failed to add codec dapm sysfs entries: %d\n",
1498 /* add codec sysfs entries */
1499 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1502 "asoc: failed to add codec sysfs files: %d\n", ret);
1507 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1509 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1510 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1511 struct snd_soc_codec *codec = rtd->codec;
1512 struct snd_soc_platform *platform = rtd->platform;
1513 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1516 dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1518 /* config components */
1519 codec_dai->codec = codec;
1520 cpu_dai->platform = platform;
1521 codec_dai->card = card;
1522 cpu_dai->card = card;
1524 /* set default power off timeout */
1525 rtd->pmdown_time = pmdown_time;
1527 /* probe the cpu_dai */
1528 if (!cpu_dai->probed) {
1529 if (cpu_dai->driver->probe) {
1530 ret = cpu_dai->driver->probe(cpu_dai);
1532 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1537 cpu_dai->probed = 1;
1538 /* mark cpu_dai as probed and add to card cpu_dai list */
1539 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1542 /* probe the CODEC */
1543 if (!codec->probed) {
1544 ret = soc_probe_codec(card, codec);
1549 /* probe the platform */
1550 if (!platform->probed) {
1551 if (platform->driver->probe) {
1552 ret = platform->driver->probe(platform);
1554 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1559 /* mark platform as probed and add to card platform list */
1561 if (!try_module_get(platform->dev->driver->owner))
1564 platform->probed = 1;
1565 list_add(&platform->card_list, &card->platform_dev_list);
1568 /* probe the CODEC DAI */
1569 if (!codec_dai->probed) {
1570 if (codec_dai->driver->probe) {
1571 ret = codec_dai->driver->probe(codec_dai);
1573 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1579 /* mark cpu_dai as probed and add to card cpu_dai list */
1580 codec_dai->probed = 1;
1581 list_add(&codec_dai->card_list, &card->dai_dev_list);
1584 /* DAPM dai link stream work */
1585 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1587 ret = soc_post_component_init(card, codec, num, 0);
1591 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1593 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1595 /* create the pcm */
1596 ret = soc_new_pcm(rtd, num);
1598 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1602 /* add platform data for AC97 devices */
1603 if (rtd->codec_dai->driver->ac97_control)
1604 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1609 #ifdef CONFIG_SND_SOC_AC97_BUS
1610 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1614 /* Only instantiate AC97 if not already done by the adaptor
1615 * for the generic AC97 subsystem.
1617 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1619 * It is possible that the AC97 device is already registered to
1620 * the device subsystem. This happens when the device is created
1621 * via snd_ac97_mixer(). Currently only SoC codec that does so
1622 * is the generic AC97 glue but others migh emerge.
1624 * In those cases we don't try to register the device again.
1626 if (!rtd->codec->ac97_created)
1629 ret = soc_ac97_dev_register(rtd->codec);
1631 printk(KERN_ERR "asoc: AC97 device register failed\n");
1635 rtd->codec->ac97_registered = 1;
1640 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1642 if (codec->ac97_registered) {
1643 soc_ac97_dev_unregister(codec);
1644 codec->ac97_registered = 0;
1649 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1651 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1652 struct snd_soc_codec *codec;
1655 /* find CODEC from registered CODECs*/
1656 list_for_each_entry(codec, &codec_list, list) {
1657 if (!strcmp(codec->name, aux_dev->codec_name)) {
1658 if (codec->probed) {
1660 "asoc: codec already probed");
1667 /* codec not found */
1668 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1672 if (!try_module_get(codec->dev->driver->owner))
1675 ret = soc_probe_codec(card, codec);
1679 ret = soc_post_component_init(card, codec, num, 1);
1685 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1687 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1688 struct snd_soc_codec *codec = rtd->codec;
1690 /* unregister the rtd device */
1691 if (rtd->dev_registered) {
1692 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1693 device_unregister(&rtd->dev);
1694 rtd->dev_registered = 0;
1697 if (codec && codec->probed)
1698 soc_remove_codec(codec);
1701 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1702 enum snd_soc_compress_type compress_type)
1706 if (codec->cache_init)
1709 /* override the compress_type if necessary */
1710 if (compress_type && codec->compress_type != compress_type)
1711 codec->compress_type = compress_type;
1712 ret = snd_soc_cache_init(codec);
1714 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1718 codec->cache_init = 1;
1722 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1724 struct platform_device *pdev = to_platform_device(card->dev);
1725 struct snd_soc_codec *codec;
1726 struct snd_soc_codec_conf *codec_conf;
1727 enum snd_soc_compress_type compress_type;
1730 mutex_lock(&card->mutex);
1732 if (card->instantiated) {
1733 mutex_unlock(&card->mutex);
1738 for (i = 0; i < card->num_links; i++)
1739 soc_bind_dai_link(card, i);
1741 /* bind completed ? */
1742 if (card->num_rtd != card->num_links) {
1743 mutex_unlock(&card->mutex);
1747 /* initialize the register cache for each available codec */
1748 list_for_each_entry(codec, &codec_list, list) {
1749 if (codec->cache_init)
1751 /* check to see if we need to override the compress_type */
1752 for (i = 0; i < card->num_configs; ++i) {
1753 codec_conf = &card->codec_conf[i];
1754 if (!strcmp(codec->name, codec_conf->dev_name)) {
1755 compress_type = codec_conf->compress_type;
1756 if (compress_type && compress_type
1757 != codec->compress_type)
1761 if (i == card->num_configs) {
1762 /* no need to override the compress_type so
1763 * go ahead and do the standard thing */
1764 ret = snd_soc_init_codec_cache(codec, 0);
1766 mutex_unlock(&card->mutex);
1771 /* override the compress_type with the one supplied in
1772 * the machine driver */
1773 ret = snd_soc_init_codec_cache(codec, compress_type);
1775 mutex_unlock(&card->mutex);
1780 /* card bind complete so register a sound card */
1781 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1782 card->owner, 0, &card->snd_card);
1784 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1786 mutex_unlock(&card->mutex);
1789 card->snd_card->dev = card->dev;
1792 /* deferred resume work */
1793 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1796 /* initialise the sound card only once */
1798 ret = card->probe(pdev);
1800 goto card_probe_error;
1803 for (i = 0; i < card->num_links; i++) {
1804 ret = soc_probe_dai_link(card, i);
1806 pr_err("asoc: failed to instantiate card %s: %d\n",
1812 for (i = 0; i < card->num_aux_devs; i++) {
1813 ret = soc_probe_aux_dev(card, i);
1815 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1817 goto probe_aux_dev_err;
1821 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1823 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1826 ret = snd_card_register(card->snd_card);
1828 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1829 goto probe_aux_dev_err;
1832 #ifdef CONFIG_SND_SOC_AC97_BUS
1833 /* register any AC97 codecs */
1834 for (i = 0; i < card->num_rtd; i++) {
1835 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1837 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1839 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1840 goto probe_aux_dev_err;
1845 card->instantiated = 1;
1846 mutex_unlock(&card->mutex);
1850 for (i = 0; i < card->num_aux_devs; i++)
1851 soc_remove_aux_dev(card, i);
1854 for (i = 0; i < card->num_links; i++)
1855 soc_remove_dai_link(card, i);
1861 snd_card_free(card->snd_card);
1863 mutex_unlock(&card->mutex);
1867 * Attempt to initialise any uninitialised cards. Must be called with
1870 static void snd_soc_instantiate_cards(void)
1872 struct snd_soc_card *card;
1873 list_for_each_entry(card, &card_list, list)
1874 snd_soc_instantiate_card(card);
1877 /* probes a new socdev */
1878 static int soc_probe(struct platform_device *pdev)
1880 struct snd_soc_card *card = platform_get_drvdata(pdev);
1883 /* Bodge while we unpick instantiation */
1884 card->dev = &pdev->dev;
1885 INIT_LIST_HEAD(&card->dai_dev_list);
1886 INIT_LIST_HEAD(&card->codec_dev_list);
1887 INIT_LIST_HEAD(&card->platform_dev_list);
1888 INIT_LIST_HEAD(&card->widgets);
1889 INIT_LIST_HEAD(&card->paths);
1890 INIT_LIST_HEAD(&card->dapm_list);
1892 soc_init_card_debugfs(card);
1894 ret = snd_soc_register_card(card);
1896 dev_err(&pdev->dev, "Failed to register card\n");
1903 /* removes a socdev */
1904 static int soc_remove(struct platform_device *pdev)
1906 struct snd_soc_card *card = platform_get_drvdata(pdev);
1909 if (card->instantiated) {
1911 /* make sure any delayed work runs */
1912 for (i = 0; i < card->num_rtd; i++) {
1913 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1914 flush_delayed_work_sync(&rtd->delayed_work);
1917 /* remove auxiliary devices */
1918 for (i = 0; i < card->num_aux_devs; i++)
1919 soc_remove_aux_dev(card, i);
1921 /* remove and free each DAI */
1922 for (i = 0; i < card->num_rtd; i++)
1923 soc_remove_dai_link(card, i);
1925 soc_cleanup_card_debugfs(card);
1927 /* remove the card */
1932 snd_card_free(card->snd_card);
1934 snd_soc_unregister_card(card);
1938 static int soc_poweroff(struct device *dev)
1940 struct platform_device *pdev = to_platform_device(dev);
1941 struct snd_soc_card *card = platform_get_drvdata(pdev);
1944 if (!card->instantiated)
1947 /* Flush out pmdown_time work - we actually do want to run it
1948 * now, we're shutting down so no imminent restart. */
1949 for (i = 0; i < card->num_rtd; i++) {
1950 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1951 flush_delayed_work_sync(&rtd->delayed_work);
1954 snd_soc_dapm_shutdown(card);
1959 static const struct dev_pm_ops soc_pm_ops = {
1960 .suspend = soc_suspend,
1961 .resume = soc_resume,
1962 .poweroff = soc_poweroff,
1965 /* ASoC platform driver */
1966 static struct platform_driver soc_driver = {
1968 .name = "soc-audio",
1969 .owner = THIS_MODULE,
1973 .remove = soc_remove,
1976 /* create a new pcm */
1977 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1979 struct snd_soc_codec *codec = rtd->codec;
1980 struct snd_soc_platform *platform = rtd->platform;
1981 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1982 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1983 struct snd_pcm *pcm;
1985 int ret = 0, playback = 0, capture = 0;
1987 /* check client and interface hw capabilities */
1988 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1989 rtd->dai_link->stream_name, codec_dai->name, num);
1991 if (codec_dai->driver->playback.channels_min)
1993 if (codec_dai->driver->capture.channels_min)
1996 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
1997 ret = snd_pcm_new(rtd->card->snd_card, new_name,
1998 num, playback, capture, &pcm);
2000 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2005 pcm->private_data = rtd;
2006 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2007 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2008 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2009 soc_pcm_ops.copy = platform->driver->ops->copy;
2010 soc_pcm_ops.silence = platform->driver->ops->silence;
2011 soc_pcm_ops.ack = platform->driver->ops->ack;
2012 soc_pcm_ops.page = platform->driver->ops->page;
2015 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2018 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2020 ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2022 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2026 pcm->private_free = platform->driver->pcm_free;
2027 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2033 * snd_soc_codec_volatile_register: Report if a register is volatile.
2035 * @codec: CODEC to query.
2036 * @reg: Register to query.
2038 * Boolean function indiciating if a CODEC register is volatile.
2040 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
2042 if (codec->driver->volatile_register)
2043 return codec->driver->volatile_register(reg);
2047 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2050 * snd_soc_new_ac97_codec - initailise AC97 device
2051 * @codec: audio codec
2052 * @ops: AC97 bus operations
2053 * @num: AC97 codec number
2055 * Initialises AC97 codec resources for use by ad-hoc devices only.
2057 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2058 struct snd_ac97_bus_ops *ops, int num)
2060 mutex_lock(&codec->mutex);
2062 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2063 if (codec->ac97 == NULL) {
2064 mutex_unlock(&codec->mutex);
2068 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2069 if (codec->ac97->bus == NULL) {
2072 mutex_unlock(&codec->mutex);
2076 codec->ac97->bus->ops = ops;
2077 codec->ac97->num = num;
2080 * Mark the AC97 device to be created by us. This way we ensure that the
2081 * device will be registered with the device subsystem later on.
2083 codec->ac97_created = 1;
2085 mutex_unlock(&codec->mutex);
2088 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2091 * snd_soc_free_ac97_codec - free AC97 codec device
2092 * @codec: audio codec
2094 * Frees AC97 codec device resources.
2096 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2098 mutex_lock(&codec->mutex);
2099 #ifdef CONFIG_SND_SOC_AC97_BUS
2100 soc_unregister_ac97_dai_link(codec);
2102 kfree(codec->ac97->bus);
2105 codec->ac97_created = 0;
2106 mutex_unlock(&codec->mutex);
2108 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2110 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2114 ret = codec->read(codec, reg);
2115 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2116 trace_snd_soc_reg_read(codec, reg, ret);
2120 EXPORT_SYMBOL_GPL(snd_soc_read);
2122 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2123 unsigned int reg, unsigned int val)
2125 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2126 trace_snd_soc_reg_write(codec, reg, val);
2127 return codec->write(codec, reg, val);
2129 EXPORT_SYMBOL_GPL(snd_soc_write);
2132 * snd_soc_update_bits - update codec register bits
2133 * @codec: audio codec
2134 * @reg: codec register
2135 * @mask: register mask
2138 * Writes new register value.
2140 * Returns 1 for change, 0 for no change, or negative error code.
2142 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2143 unsigned int mask, unsigned int value)
2146 unsigned int old, new;
2149 ret = snd_soc_read(codec, reg);
2154 new = (old & ~mask) | value;
2155 change = old != new;
2157 ret = snd_soc_write(codec, reg, new);
2164 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2167 * snd_soc_update_bits_locked - update codec register bits
2168 * @codec: audio codec
2169 * @reg: codec register
2170 * @mask: register mask
2173 * Writes new register value, and takes the codec mutex.
2175 * Returns 1 for change else 0.
2177 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2178 unsigned short reg, unsigned int mask,
2183 mutex_lock(&codec->mutex);
2184 change = snd_soc_update_bits(codec, reg, mask, value);
2185 mutex_unlock(&codec->mutex);
2189 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2192 * snd_soc_test_bits - test register for change
2193 * @codec: audio codec
2194 * @reg: codec register
2195 * @mask: register mask
2198 * Tests a register with a new value and checks if the new value is
2199 * different from the old value.
2201 * Returns 1 for change else 0.
2203 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2204 unsigned int mask, unsigned int value)
2207 unsigned int old, new;
2209 old = snd_soc_read(codec, reg);
2210 new = (old & ~mask) | value;
2211 change = old != new;
2215 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2218 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2219 * @substream: the pcm substream
2220 * @hw: the hardware parameters
2222 * Sets the substream runtime hardware parameters.
2224 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2225 const struct snd_pcm_hardware *hw)
2227 struct snd_pcm_runtime *runtime = substream->runtime;
2228 runtime->hw.info = hw->info;
2229 runtime->hw.formats = hw->formats;
2230 runtime->hw.period_bytes_min = hw->period_bytes_min;
2231 runtime->hw.period_bytes_max = hw->period_bytes_max;
2232 runtime->hw.periods_min = hw->periods_min;
2233 runtime->hw.periods_max = hw->periods_max;
2234 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2235 runtime->hw.fifo_size = hw->fifo_size;
2238 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2241 * snd_soc_cnew - create new control
2242 * @_template: control template
2243 * @data: control private data
2244 * @long_name: control long name
2246 * Create a new mixer control from a template control.
2248 * Returns 0 for success, else error.
2250 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2251 void *data, char *long_name)
2253 struct snd_kcontrol_new template;
2255 memcpy(&template, _template, sizeof(template));
2257 template.name = long_name;
2260 return snd_ctl_new1(&template, data);
2262 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2265 * snd_soc_add_controls - add an array of controls to a codec.
2266 * Convienience function to add a list of controls. Many codecs were
2267 * duplicating this code.
2269 * @codec: codec to add controls to
2270 * @controls: array of controls to add
2271 * @num_controls: number of elements in the array
2273 * Return 0 for success, else error.
2275 int snd_soc_add_controls(struct snd_soc_codec *codec,
2276 const struct snd_kcontrol_new *controls, int num_controls)
2278 struct snd_card *card = codec->card->snd_card;
2279 char prefixed_name[44], *name;
2282 for (i = 0; i < num_controls; i++) {
2283 const struct snd_kcontrol_new *control = &controls[i];
2284 if (codec->name_prefix) {
2285 snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
2286 codec->name_prefix, control->name);
2287 name = prefixed_name;
2289 name = control->name;
2291 err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
2293 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2294 codec->name, name, err);
2301 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2304 * snd_soc_info_enum_double - enumerated double mixer info callback
2305 * @kcontrol: mixer control
2306 * @uinfo: control element information
2308 * Callback to provide information about a double enumerated
2311 * Returns 0 for success.
2313 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2314 struct snd_ctl_elem_info *uinfo)
2316 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2318 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2319 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2320 uinfo->value.enumerated.items = e->max;
2322 if (uinfo->value.enumerated.item > e->max - 1)
2323 uinfo->value.enumerated.item = e->max - 1;
2324 strcpy(uinfo->value.enumerated.name,
2325 e->texts[uinfo->value.enumerated.item]);
2328 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2331 * snd_soc_get_enum_double - enumerated double mixer get callback
2332 * @kcontrol: mixer control
2333 * @ucontrol: control element information
2335 * Callback to get the value of a double enumerated mixer.
2337 * Returns 0 for success.
2339 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2340 struct snd_ctl_elem_value *ucontrol)
2342 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2343 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2344 unsigned int val, bitmask;
2346 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2348 val = snd_soc_read(codec, e->reg);
2349 ucontrol->value.enumerated.item[0]
2350 = (val >> e->shift_l) & (bitmask - 1);
2351 if (e->shift_l != e->shift_r)
2352 ucontrol->value.enumerated.item[1] =
2353 (val >> e->shift_r) & (bitmask - 1);
2357 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2360 * snd_soc_put_enum_double - enumerated double mixer put callback
2361 * @kcontrol: mixer control
2362 * @ucontrol: control element information
2364 * Callback to set the value of a double enumerated mixer.
2366 * Returns 0 for success.
2368 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2369 struct snd_ctl_elem_value *ucontrol)
2371 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2372 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2374 unsigned int mask, bitmask;
2376 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2378 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2380 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2381 mask = (bitmask - 1) << e->shift_l;
2382 if (e->shift_l != e->shift_r) {
2383 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2385 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2386 mask |= (bitmask - 1) << e->shift_r;
2389 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2391 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2394 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2395 * @kcontrol: mixer control
2396 * @ucontrol: control element information
2398 * Callback to get the value of a double semi enumerated mixer.
2400 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2401 * used for handling bitfield coded enumeration for example.
2403 * Returns 0 for success.
2405 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2406 struct snd_ctl_elem_value *ucontrol)
2408 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2409 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2410 unsigned int reg_val, val, mux;
2412 reg_val = snd_soc_read(codec, e->reg);
2413 val = (reg_val >> e->shift_l) & e->mask;
2414 for (mux = 0; mux < e->max; mux++) {
2415 if (val == e->values[mux])
2418 ucontrol->value.enumerated.item[0] = mux;
2419 if (e->shift_l != e->shift_r) {
2420 val = (reg_val >> e->shift_r) & e->mask;
2421 for (mux = 0; mux < e->max; mux++) {
2422 if (val == e->values[mux])
2425 ucontrol->value.enumerated.item[1] = mux;
2430 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2433 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2434 * @kcontrol: mixer control
2435 * @ucontrol: control element information
2437 * Callback to set the value of a double semi enumerated mixer.
2439 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2440 * used for handling bitfield coded enumeration for example.
2442 * Returns 0 for success.
2444 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2445 struct snd_ctl_elem_value *ucontrol)
2447 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2448 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2452 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2454 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2455 mask = e->mask << e->shift_l;
2456 if (e->shift_l != e->shift_r) {
2457 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2459 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2460 mask |= e->mask << e->shift_r;
2463 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2465 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2468 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2469 * @kcontrol: mixer control
2470 * @uinfo: control element information
2472 * Callback to provide information about an external enumerated
2475 * Returns 0 for success.
2477 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2478 struct snd_ctl_elem_info *uinfo)
2480 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2482 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2484 uinfo->value.enumerated.items = e->max;
2486 if (uinfo->value.enumerated.item > e->max - 1)
2487 uinfo->value.enumerated.item = e->max - 1;
2488 strcpy(uinfo->value.enumerated.name,
2489 e->texts[uinfo->value.enumerated.item]);
2492 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2495 * snd_soc_info_volsw_ext - external single mixer info callback
2496 * @kcontrol: mixer control
2497 * @uinfo: control element information
2499 * Callback to provide information about a single external mixer control.
2501 * Returns 0 for success.
2503 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2504 struct snd_ctl_elem_info *uinfo)
2506 int max = kcontrol->private_value;
2508 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2509 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2511 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2514 uinfo->value.integer.min = 0;
2515 uinfo->value.integer.max = max;
2518 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2521 * snd_soc_info_volsw - single mixer info callback
2522 * @kcontrol: mixer control
2523 * @uinfo: control element information
2525 * Callback to provide information about a single mixer control.
2527 * Returns 0 for success.
2529 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2530 struct snd_ctl_elem_info *uinfo)
2532 struct soc_mixer_control *mc =
2533 (struct soc_mixer_control *)kcontrol->private_value;
2535 unsigned int shift = mc->shift;
2536 unsigned int rshift = mc->rshift;
2538 if (!mc->platform_max)
2539 mc->platform_max = mc->max;
2540 platform_max = mc->platform_max;
2542 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2543 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2545 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2547 uinfo->count = shift == rshift ? 1 : 2;
2548 uinfo->value.integer.min = 0;
2549 uinfo->value.integer.max = platform_max;
2552 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2555 * snd_soc_get_volsw - single mixer get callback
2556 * @kcontrol: mixer control
2557 * @ucontrol: control element information
2559 * Callback to get the value of a single mixer control.
2561 * Returns 0 for success.
2563 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2564 struct snd_ctl_elem_value *ucontrol)
2566 struct soc_mixer_control *mc =
2567 (struct soc_mixer_control *)kcontrol->private_value;
2568 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2569 unsigned int reg = mc->reg;
2570 unsigned int shift = mc->shift;
2571 unsigned int rshift = mc->rshift;
2573 unsigned int mask = (1 << fls(max)) - 1;
2574 unsigned int invert = mc->invert;
2576 ucontrol->value.integer.value[0] =
2577 (snd_soc_read(codec, reg) >> shift) & mask;
2578 if (shift != rshift)
2579 ucontrol->value.integer.value[1] =
2580 (snd_soc_read(codec, reg) >> rshift) & mask;
2582 ucontrol->value.integer.value[0] =
2583 max - ucontrol->value.integer.value[0];
2584 if (shift != rshift)
2585 ucontrol->value.integer.value[1] =
2586 max - ucontrol->value.integer.value[1];
2591 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2594 * snd_soc_put_volsw - single mixer put callback
2595 * @kcontrol: mixer control
2596 * @ucontrol: control element information
2598 * Callback to set the value of a single mixer control.
2600 * Returns 0 for success.
2602 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2603 struct snd_ctl_elem_value *ucontrol)
2605 struct soc_mixer_control *mc =
2606 (struct soc_mixer_control *)kcontrol->private_value;
2607 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2608 unsigned int reg = mc->reg;
2609 unsigned int shift = mc->shift;
2610 unsigned int rshift = mc->rshift;
2612 unsigned int mask = (1 << fls(max)) - 1;
2613 unsigned int invert = mc->invert;
2614 unsigned int val, val2, val_mask;
2616 val = (ucontrol->value.integer.value[0] & mask);
2619 val_mask = mask << shift;
2621 if (shift != rshift) {
2622 val2 = (ucontrol->value.integer.value[1] & mask);
2625 val_mask |= mask << rshift;
2626 val |= val2 << rshift;
2628 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2630 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2633 * snd_soc_info_volsw_2r - double mixer info callback
2634 * @kcontrol: mixer control
2635 * @uinfo: control element information
2637 * Callback to provide information about a double mixer control that
2638 * spans 2 codec registers.
2640 * Returns 0 for success.
2642 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2643 struct snd_ctl_elem_info *uinfo)
2645 struct soc_mixer_control *mc =
2646 (struct soc_mixer_control *)kcontrol->private_value;
2649 if (!mc->platform_max)
2650 mc->platform_max = mc->max;
2651 platform_max = mc->platform_max;
2653 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2654 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2656 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2659 uinfo->value.integer.min = 0;
2660 uinfo->value.integer.max = platform_max;
2663 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2666 * snd_soc_get_volsw_2r - double mixer get callback
2667 * @kcontrol: mixer control
2668 * @ucontrol: control element information
2670 * Callback to get the value of a double mixer control that spans 2 registers.
2672 * Returns 0 for success.
2674 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2675 struct snd_ctl_elem_value *ucontrol)
2677 struct soc_mixer_control *mc =
2678 (struct soc_mixer_control *)kcontrol->private_value;
2679 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2680 unsigned int reg = mc->reg;
2681 unsigned int reg2 = mc->rreg;
2682 unsigned int shift = mc->shift;
2684 unsigned int mask = (1 << fls(max)) - 1;
2685 unsigned int invert = mc->invert;
2687 ucontrol->value.integer.value[0] =
2688 (snd_soc_read(codec, reg) >> shift) & mask;
2689 ucontrol->value.integer.value[1] =
2690 (snd_soc_read(codec, reg2) >> shift) & mask;
2692 ucontrol->value.integer.value[0] =
2693 max - ucontrol->value.integer.value[0];
2694 ucontrol->value.integer.value[1] =
2695 max - ucontrol->value.integer.value[1];
2700 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2703 * snd_soc_put_volsw_2r - double mixer set callback
2704 * @kcontrol: mixer control
2705 * @ucontrol: control element information
2707 * Callback to set the value of a double mixer control that spans 2 registers.
2709 * Returns 0 for success.
2711 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2712 struct snd_ctl_elem_value *ucontrol)
2714 struct soc_mixer_control *mc =
2715 (struct soc_mixer_control *)kcontrol->private_value;
2716 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2717 unsigned int reg = mc->reg;
2718 unsigned int reg2 = mc->rreg;
2719 unsigned int shift = mc->shift;
2721 unsigned int mask = (1 << fls(max)) - 1;
2722 unsigned int invert = mc->invert;
2724 unsigned int val, val2, val_mask;
2726 val_mask = mask << shift;
2727 val = (ucontrol->value.integer.value[0] & mask);
2728 val2 = (ucontrol->value.integer.value[1] & mask);
2736 val2 = val2 << shift;
2738 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2742 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2745 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2748 * snd_soc_info_volsw_s8 - signed mixer info callback
2749 * @kcontrol: mixer control
2750 * @uinfo: control element information
2752 * Callback to provide information about a signed mixer control.
2754 * Returns 0 for success.
2756 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2757 struct snd_ctl_elem_info *uinfo)
2759 struct soc_mixer_control *mc =
2760 (struct soc_mixer_control *)kcontrol->private_value;
2764 if (!mc->platform_max)
2765 mc->platform_max = mc->max;
2766 platform_max = mc->platform_max;
2768 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2770 uinfo->value.integer.min = 0;
2771 uinfo->value.integer.max = platform_max - min;
2774 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2777 * snd_soc_get_volsw_s8 - signed mixer get callback
2778 * @kcontrol: mixer control
2779 * @ucontrol: control element information
2781 * Callback to get the value of a signed mixer control.
2783 * Returns 0 for success.
2785 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2786 struct snd_ctl_elem_value *ucontrol)
2788 struct soc_mixer_control *mc =
2789 (struct soc_mixer_control *)kcontrol->private_value;
2790 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2791 unsigned int reg = mc->reg;
2793 int val = snd_soc_read(codec, reg);
2795 ucontrol->value.integer.value[0] =
2796 ((signed char)(val & 0xff))-min;
2797 ucontrol->value.integer.value[1] =
2798 ((signed char)((val >> 8) & 0xff))-min;
2801 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2804 * snd_soc_put_volsw_sgn - signed mixer put callback
2805 * @kcontrol: mixer control
2806 * @ucontrol: control element information
2808 * Callback to set the value of a signed mixer control.
2810 * Returns 0 for success.
2812 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2813 struct snd_ctl_elem_value *ucontrol)
2815 struct soc_mixer_control *mc =
2816 (struct soc_mixer_control *)kcontrol->private_value;
2817 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2818 unsigned int reg = mc->reg;
2822 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2823 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2825 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2827 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2830 * snd_soc_limit_volume - Set new limit to an existing volume control.
2832 * @codec: where to look for the control
2833 * @name: Name of the control
2834 * @max: new maximum limit
2836 * Return 0 for success, else error.
2838 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2839 const char *name, int max)
2841 struct snd_card *card = codec->card->snd_card;
2842 struct snd_kcontrol *kctl;
2843 struct soc_mixer_control *mc;
2847 /* Sanity check for name and max */
2848 if (unlikely(!name || max <= 0))
2851 list_for_each_entry(kctl, &card->controls, list) {
2852 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2858 mc = (struct soc_mixer_control *)kctl->private_value;
2859 if (max <= mc->max) {
2860 mc->platform_max = max;
2866 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2869 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2870 * mixer info callback
2871 * @kcontrol: mixer control
2872 * @uinfo: control element information
2874 * Returns 0 for success.
2876 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2877 struct snd_ctl_elem_info *uinfo)
2879 struct soc_mixer_control *mc =
2880 (struct soc_mixer_control *)kcontrol->private_value;
2884 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2886 uinfo->value.integer.min = 0;
2887 uinfo->value.integer.max = max-min;
2891 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2894 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2895 * mixer get callback
2896 * @kcontrol: mixer control
2897 * @uinfo: control element information
2899 * Returns 0 for success.
2901 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2902 struct snd_ctl_elem_value *ucontrol)
2904 struct soc_mixer_control *mc =
2905 (struct soc_mixer_control *)kcontrol->private_value;
2906 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2907 unsigned int mask = (1<<mc->shift)-1;
2909 int val = snd_soc_read(codec, mc->reg) & mask;
2910 int valr = snd_soc_read(codec, mc->rreg) & mask;
2912 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2913 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2916 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2919 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2920 * mixer put callback
2921 * @kcontrol: mixer control
2922 * @uinfo: control element information
2924 * Returns 0 for success.
2926 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2927 struct snd_ctl_elem_value *ucontrol)
2929 struct soc_mixer_control *mc =
2930 (struct soc_mixer_control *)kcontrol->private_value;
2931 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2932 unsigned int mask = (1<<mc->shift)-1;
2935 unsigned int val, valr, oval, ovalr;
2937 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2939 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2942 oval = snd_soc_read(codec, mc->reg) & mask;
2943 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2947 ret = snd_soc_write(codec, mc->reg, val);
2951 if (ovalr != valr) {
2952 ret = snd_soc_write(codec, mc->rreg, valr);
2959 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2962 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2964 * @clk_id: DAI specific clock ID
2965 * @freq: new clock frequency in Hz
2966 * @dir: new clock direction - input/output.
2968 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2970 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2971 unsigned int freq, int dir)
2973 if (dai->driver && dai->driver->ops->set_sysclk)
2974 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2978 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2981 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2983 * @div_id: DAI specific clock divider ID
2984 * @div: new clock divisor.
2986 * Configures the clock dividers. This is used to derive the best DAI bit and
2987 * frame clocks from the system or master clock. It's best to set the DAI bit
2988 * and frame clocks as low as possible to save system power.
2990 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2991 int div_id, int div)
2993 if (dai->driver && dai->driver->ops->set_clkdiv)
2994 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2998 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3001 * snd_soc_dai_set_pll - configure DAI PLL.
3003 * @pll_id: DAI specific PLL ID
3004 * @source: DAI specific source for the PLL
3005 * @freq_in: PLL input clock frequency in Hz
3006 * @freq_out: requested PLL output clock frequency in Hz
3008 * Configures and enables PLL to generate output clock based on input clock.
3010 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3011 unsigned int freq_in, unsigned int freq_out)
3013 if (dai->driver && dai->driver->ops->set_pll)
3014 return dai->driver->ops->set_pll(dai, pll_id, source,
3019 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3022 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3024 * @fmt: SND_SOC_DAIFMT_ format value.
3026 * Configures the DAI hardware format and clocking.
3028 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3030 if (dai->driver && dai->driver->ops->set_fmt)
3031 return dai->driver->ops->set_fmt(dai, fmt);
3035 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3038 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3040 * @tx_mask: bitmask representing active TX slots.
3041 * @rx_mask: bitmask representing active RX slots.
3042 * @slots: Number of slots in use.
3043 * @slot_width: Width in bits for each slot.
3045 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3048 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3049 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3051 if (dai->driver && dai->driver->ops->set_tdm_slot)
3052 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3057 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3060 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3062 * @tx_num: how many TX channels
3063 * @tx_slot: pointer to an array which imply the TX slot number channel
3065 * @rx_num: how many RX channels
3066 * @rx_slot: pointer to an array which imply the RX slot number channel
3069 * configure the relationship between channel number and TDM slot number.
3071 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3072 unsigned int tx_num, unsigned int *tx_slot,
3073 unsigned int rx_num, unsigned int *rx_slot)
3075 if (dai->driver && dai->driver->ops->set_channel_map)
3076 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3081 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3084 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3086 * @tristate: tristate enable
3088 * Tristates the DAI so that others can use it.
3090 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3092 if (dai->driver && dai->driver->ops->set_tristate)
3093 return dai->driver->ops->set_tristate(dai, tristate);
3097 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3100 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3102 * @mute: mute enable
3104 * Mutes the DAI DAC.
3106 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3108 if (dai->driver && dai->driver->ops->digital_mute)
3109 return dai->driver->ops->digital_mute(dai, mute);
3113 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3116 * snd_soc_register_card - Register a card with the ASoC core
3118 * @card: Card to register
3120 * Note that currently this is an internal only function: it will be
3121 * exposed to machine drivers after further backporting of ASoC v2
3122 * registration APIs.
3124 static int snd_soc_register_card(struct snd_soc_card *card)
3128 if (!card->name || !card->dev)
3131 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3132 (card->num_links + card->num_aux_devs),
3134 if (card->rtd == NULL)
3136 card->rtd_aux = &card->rtd[card->num_links];
3138 for (i = 0; i < card->num_links; i++)
3139 card->rtd[i].dai_link = &card->dai_link[i];
3141 INIT_LIST_HEAD(&card->list);
3142 card->instantiated = 0;
3143 mutex_init(&card->mutex);
3145 mutex_lock(&client_mutex);
3146 list_add(&card->list, &card_list);
3147 snd_soc_instantiate_cards();
3148 mutex_unlock(&client_mutex);
3150 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3156 * snd_soc_unregister_card - Unregister a card with the ASoC core
3158 * @card: Card to unregister
3160 * Note that currently this is an internal only function: it will be
3161 * exposed to machine drivers after further backporting of ASoC v2
3162 * registration APIs.
3164 static int snd_soc_unregister_card(struct snd_soc_card *card)
3166 mutex_lock(&client_mutex);
3167 list_del(&card->list);
3168 mutex_unlock(&client_mutex);
3169 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3175 * Simplify DAI link configuration by removing ".-1" from device names
3176 * and sanitizing names.
3178 static char *fmt_single_name(struct device *dev, int *id)
3180 char *found, name[NAME_SIZE];
3183 if (dev_name(dev) == NULL)
3186 strlcpy(name, dev_name(dev), NAME_SIZE);
3188 /* are we a "%s.%d" name (platform and SPI components) */
3189 found = strstr(name, dev->driver->name);
3192 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3194 /* discard ID from name if ID == -1 */
3196 found[strlen(dev->driver->name)] = '\0';
3200 /* I2C component devices are named "bus-addr" */
3201 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3202 char tmp[NAME_SIZE];
3204 /* create unique ID number from I2C addr and bus */
3205 *id = ((id1 & 0xffff) << 16) + id2;
3207 /* sanitize component name for DAI link creation */
3208 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3209 strlcpy(name, tmp, NAME_SIZE);
3214 return kstrdup(name, GFP_KERNEL);
3218 * Simplify DAI link naming for single devices with multiple DAIs by removing
3219 * any ".-1" and using the DAI name (instead of device name).
3221 static inline char *fmt_multiple_name(struct device *dev,
3222 struct snd_soc_dai_driver *dai_drv)
3224 if (dai_drv->name == NULL) {
3225 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3230 return kstrdup(dai_drv->name, GFP_KERNEL);
3234 * snd_soc_register_dai - Register a DAI with the ASoC core
3236 * @dai: DAI to register
3238 int snd_soc_register_dai(struct device *dev,
3239 struct snd_soc_dai_driver *dai_drv)
3241 struct snd_soc_dai *dai;
3243 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3245 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3249 /* create DAI component name */
3250 dai->name = fmt_single_name(dev, &dai->id);
3251 if (dai->name == NULL) {
3257 dai->driver = dai_drv;
3258 if (!dai->driver->ops)
3259 dai->driver->ops = &null_dai_ops;
3261 mutex_lock(&client_mutex);
3262 list_add(&dai->list, &dai_list);
3263 snd_soc_instantiate_cards();
3264 mutex_unlock(&client_mutex);
3266 pr_debug("Registered DAI '%s'\n", dai->name);
3270 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3273 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3275 * @dai: DAI to unregister
3277 void snd_soc_unregister_dai(struct device *dev)
3279 struct snd_soc_dai *dai;
3281 list_for_each_entry(dai, &dai_list, list) {
3282 if (dev == dai->dev)
3288 mutex_lock(&client_mutex);
3289 list_del(&dai->list);
3290 mutex_unlock(&client_mutex);
3292 pr_debug("Unregistered DAI '%s'\n", dai->name);
3296 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3299 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3301 * @dai: Array of DAIs to register
3302 * @count: Number of DAIs
3304 int snd_soc_register_dais(struct device *dev,
3305 struct snd_soc_dai_driver *dai_drv, size_t count)
3307 struct snd_soc_dai *dai;
3310 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3312 for (i = 0; i < count; i++) {
3314 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3320 /* create DAI component name */
3321 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3322 if (dai->name == NULL) {
3329 dai->driver = &dai_drv[i];
3330 if (dai->driver->id)
3331 dai->id = dai->driver->id;
3334 if (!dai->driver->ops)
3335 dai->driver->ops = &null_dai_ops;
3337 mutex_lock(&client_mutex);
3338 list_add(&dai->list, &dai_list);
3339 mutex_unlock(&client_mutex);
3341 pr_debug("Registered DAI '%s'\n", dai->name);
3344 mutex_lock(&client_mutex);
3345 snd_soc_instantiate_cards();
3346 mutex_unlock(&client_mutex);
3350 for (i--; i >= 0; i--)
3351 snd_soc_unregister_dai(dev);
3355 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3358 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3360 * @dai: Array of DAIs to unregister
3361 * @count: Number of DAIs
3363 void snd_soc_unregister_dais(struct device *dev, size_t count)
3367 for (i = 0; i < count; i++)
3368 snd_soc_unregister_dai(dev);
3370 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3373 * snd_soc_register_platform - Register a platform with the ASoC core
3375 * @platform: platform to register
3377 int snd_soc_register_platform(struct device *dev,
3378 struct snd_soc_platform_driver *platform_drv)
3380 struct snd_soc_platform *platform;
3382 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3384 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3385 if (platform == NULL)
3388 /* create platform component name */
3389 platform->name = fmt_single_name(dev, &platform->id);
3390 if (platform->name == NULL) {
3395 platform->dev = dev;
3396 platform->driver = platform_drv;
3398 mutex_lock(&client_mutex);
3399 list_add(&platform->list, &platform_list);
3400 snd_soc_instantiate_cards();
3401 mutex_unlock(&client_mutex);
3403 pr_debug("Registered platform '%s'\n", platform->name);
3407 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3410 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3412 * @platform: platform to unregister
3414 void snd_soc_unregister_platform(struct device *dev)
3416 struct snd_soc_platform *platform;
3418 list_for_each_entry(platform, &platform_list, list) {
3419 if (dev == platform->dev)
3425 mutex_lock(&client_mutex);
3426 list_del(&platform->list);
3427 mutex_unlock(&client_mutex);
3429 pr_debug("Unregistered platform '%s'\n", platform->name);
3430 kfree(platform->name);
3433 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3435 static u64 codec_format_map[] = {
3436 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3437 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3438 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3439 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3440 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3441 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3442 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3443 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3444 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3445 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3446 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3447 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3448 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3449 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3450 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3451 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3454 /* Fix up the DAI formats for endianness: codecs don't actually see
3455 * the endianness of the data but we're using the CPU format
3456 * definitions which do need to include endianness so we ensure that
3457 * codec DAIs always have both big and little endian variants set.
3459 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3463 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3464 if (stream->formats & codec_format_map[i])
3465 stream->formats |= codec_format_map[i];
3469 * snd_soc_register_codec - Register a codec with the ASoC core
3471 * @codec: codec to register
3473 int snd_soc_register_codec(struct device *dev,
3474 const struct snd_soc_codec_driver *codec_drv,
3475 struct snd_soc_dai_driver *dai_drv,
3479 struct snd_soc_codec *codec;
3482 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3484 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3488 /* create CODEC component name */
3489 codec->name = fmt_single_name(dev, &codec->id);
3490 if (codec->name == NULL) {
3495 if (codec_drv->compress_type)
3496 codec->compress_type = codec_drv->compress_type;
3498 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3500 codec->write = codec_drv->write;
3501 codec->read = codec_drv->read;
3502 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3503 codec->dapm.dev = dev;
3504 codec->dapm.codec = codec;
3506 codec->driver = codec_drv;
3507 codec->num_dai = num_dai;
3508 mutex_init(&codec->mutex);
3510 /* allocate CODEC register cache */
3511 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3512 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3513 /* it is necessary to make a copy of the default register cache
3514 * because in the case of using a compression type that requires
3515 * the default register cache to be marked as __devinitconst the
3516 * kernel might have freed the array by the time we initialize
3519 if (codec_drv->reg_cache_default) {
3520 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3521 reg_size, GFP_KERNEL);
3522 if (!codec->reg_def_copy) {
3529 for (i = 0; i < num_dai; i++) {
3530 fixup_codec_formats(&dai_drv[i].playback);
3531 fixup_codec_formats(&dai_drv[i].capture);
3534 /* register any DAIs */
3536 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3541 mutex_lock(&client_mutex);
3542 list_add(&codec->list, &codec_list);
3543 snd_soc_instantiate_cards();
3544 mutex_unlock(&client_mutex);
3546 pr_debug("Registered codec '%s'\n", codec->name);
3550 kfree(codec->reg_def_copy);
3551 codec->reg_def_copy = NULL;
3556 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3559 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3561 * @codec: codec to unregister
3563 void snd_soc_unregister_codec(struct device *dev)
3565 struct snd_soc_codec *codec;
3568 list_for_each_entry(codec, &codec_list, list) {
3569 if (dev == codec->dev)
3576 for (i = 0; i < codec->num_dai; i++)
3577 snd_soc_unregister_dai(dev);
3579 mutex_lock(&client_mutex);
3580 list_del(&codec->list);
3581 mutex_unlock(&client_mutex);
3583 pr_debug("Unregistered codec '%s'\n", codec->name);
3585 snd_soc_cache_exit(codec);
3586 kfree(codec->reg_def_copy);
3590 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3592 static int __init snd_soc_init(void)
3594 #ifdef CONFIG_DEBUG_FS
3595 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3596 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3598 "ASoC: Failed to create debugfs directory\n");
3599 snd_soc_debugfs_root = NULL;
3602 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3604 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3606 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3608 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3610 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3611 &platform_list_fops))
3612 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3615 return platform_driver_register(&soc_driver);
3617 module_init(snd_soc_init);
3619 static void __exit snd_soc_exit(void)
3621 #ifdef CONFIG_DEBUG_FS
3622 debugfs_remove_recursive(snd_soc_debugfs_root);
3624 platform_driver_unregister(&soc_driver);
3626 module_exit(snd_soc_exit);
3628 /* Module information */
3629 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3630 MODULE_DESCRIPTION("ALSA SoC Core");
3631 MODULE_LICENSE("GPL");
3632 MODULE_ALIAS("platform:soc-audio");