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/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dapm.h>
40 #include <sound/initval.h>
44 static DEFINE_MUTEX(pcm_mutex);
45 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
47 #ifdef CONFIG_DEBUG_FS
48 static struct dentry *debugfs_root;
51 static DEFINE_MUTEX(client_mutex);
52 static LIST_HEAD(card_list);
53 static LIST_HEAD(dai_list);
54 static LIST_HEAD(platform_list);
55 static LIST_HEAD(codec_list);
57 static int snd_soc_register_card(struct snd_soc_card *card);
58 static int snd_soc_unregister_card(struct snd_soc_card *card);
59 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
66 static int pmdown_time = 5000;
67 module_param(pmdown_time, int, 0);
68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71 * This function forces any delayed work to be queued and run.
73 static int run_delayed_work(struct delayed_work *dwork)
77 /* cancel any work waiting to be queued. */
78 ret = cancel_delayed_work(dwork);
80 /* if there was any work waiting then we run it now and
81 * wait for it's completion */
83 schedule_delayed_work(dwork, 0);
84 flush_scheduled_work();
89 /* codec register dump */
90 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
92 int ret, i, step = 1, count = 0;
94 if (!codec->driver->reg_cache_size)
97 if (codec->driver->reg_cache_step)
98 step = codec->driver->reg_cache_step;
100 count += sprintf(buf, "%s registers\n", codec->name);
101 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
102 if (codec->driver->readable_register && !codec->driver->readable_register(i))
105 count += sprintf(buf + count, "%2x: ", i);
106 if (count >= PAGE_SIZE - 1)
109 if (codec->driver->display_register) {
110 count += codec->driver->display_register(codec, buf + count,
111 PAGE_SIZE - count, i);
113 /* If the read fails it's almost certainly due to
114 * the register being volatile and the device being
117 ret = codec->driver->read(codec, i);
119 count += snprintf(buf + count,
123 count += snprintf(buf + count,
125 "<no data: %d>", ret);
128 if (count >= PAGE_SIZE - 1)
131 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
132 if (count >= PAGE_SIZE - 1)
136 /* Truncate count; min() would cause a warning */
137 if (count >= PAGE_SIZE)
138 count = PAGE_SIZE - 1;
142 static ssize_t codec_reg_show(struct device *dev,
143 struct device_attribute *attr, char *buf)
145 struct snd_soc_pcm_runtime *rtd =
146 container_of(dev, struct snd_soc_pcm_runtime, dev);
148 return soc_codec_reg_show(rtd->codec, buf);
151 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
153 static ssize_t pmdown_time_show(struct device *dev,
154 struct device_attribute *attr, char *buf)
156 struct snd_soc_pcm_runtime *rtd =
157 container_of(dev, struct snd_soc_pcm_runtime, dev);
159 return sprintf(buf, "%ld\n", rtd->pmdown_time);
162 static ssize_t pmdown_time_set(struct device *dev,
163 struct device_attribute *attr,
164 const char *buf, size_t count)
166 struct snd_soc_pcm_runtime *rtd =
167 container_of(dev, struct snd_soc_pcm_runtime, dev);
170 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
177 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
179 #ifdef CONFIG_DEBUG_FS
180 static int codec_reg_open_file(struct inode *inode, struct file *file)
182 file->private_data = inode->i_private;
186 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
187 size_t count, loff_t *ppos)
190 struct snd_soc_codec *codec = file->private_data;
191 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
194 ret = soc_codec_reg_show(codec, buf);
196 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
201 static ssize_t codec_reg_write_file(struct file *file,
202 const char __user *user_buf, size_t count, loff_t *ppos)
207 unsigned long reg, value;
209 struct snd_soc_codec *codec = file->private_data;
211 buf_size = min(count, (sizeof(buf)-1));
212 if (copy_from_user(buf, user_buf, buf_size))
216 if (codec->driver->reg_cache_step)
217 step = codec->driver->reg_cache_step;
219 while (*start == ' ')
221 reg = simple_strtoul(start, &start, 16);
222 if ((reg >= codec->driver->reg_cache_size) || (reg % step))
224 while (*start == ' ')
226 if (strict_strtoul(start, 16, &value))
228 codec->driver->write(codec, reg, value);
232 static const struct file_operations codec_reg_fops = {
233 .open = codec_reg_open_file,
234 .read = codec_reg_read_file,
235 .write = codec_reg_write_file,
238 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
240 codec->debugfs_codec_root = debugfs_create_dir(codec->name ,
242 if (!codec->debugfs_codec_root) {
244 "ASoC: Failed to create codec debugfs directory\n");
248 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
249 codec->debugfs_codec_root,
250 codec, &codec_reg_fops);
251 if (!codec->debugfs_reg)
253 "ASoC: Failed to create codec register debugfs file\n");
255 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
256 codec->debugfs_codec_root,
258 if (!codec->debugfs_pop_time)
260 "Failed to create pop time debugfs file\n");
262 codec->debugfs_dapm = debugfs_create_dir("dapm",
263 codec->debugfs_codec_root);
264 if (!codec->debugfs_dapm)
266 "Failed to create DAPM debugfs directory\n");
268 snd_soc_dapm_debugfs_init(codec);
271 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
273 debugfs_remove_recursive(codec->debugfs_codec_root);
276 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
277 size_t count, loff_t *ppos)
279 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
280 ssize_t len, ret = 0;
281 struct snd_soc_codec *codec;
286 list_for_each_entry(codec, &codec_list, list) {
287 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
291 if (ret > PAGE_SIZE) {
298 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
305 static const struct file_operations codec_list_fops = {
306 .read = codec_list_read_file,
307 .llseek = default_llseek,/* read accesses f_pos */
310 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
311 size_t count, loff_t *ppos)
313 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
314 ssize_t len, ret = 0;
315 struct snd_soc_dai *dai;
320 list_for_each_entry(dai, &dai_list, list) {
321 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
324 if (ret > PAGE_SIZE) {
330 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
337 static const struct file_operations dai_list_fops = {
338 .read = dai_list_read_file,
339 .llseek = default_llseek,/* read accesses f_pos */
342 static ssize_t platform_list_read_file(struct file *file,
343 char __user *user_buf,
344 size_t count, loff_t *ppos)
346 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
347 ssize_t len, ret = 0;
348 struct snd_soc_platform *platform;
353 list_for_each_entry(platform, &platform_list, list) {
354 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
358 if (ret > PAGE_SIZE) {
364 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
371 static const struct file_operations platform_list_fops = {
372 .read = platform_list_read_file,
373 .llseek = default_llseek,/* read accesses f_pos */
378 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
382 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
387 #ifdef CONFIG_SND_SOC_AC97_BUS
388 /* unregister ac97 codec */
389 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
391 if (codec->ac97->dev.bus)
392 device_unregister(&codec->ac97->dev);
396 /* stop no dev release warning */
397 static void soc_ac97_device_release(struct device *dev){}
399 /* register ac97 codec to bus */
400 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
404 codec->ac97->dev.bus = &ac97_bus_type;
405 codec->ac97->dev.parent = codec->card->dev;
406 codec->ac97->dev.release = soc_ac97_device_release;
408 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
409 codec->card->snd_card->number, 0, codec->name);
410 err = device_register(&codec->ac97->dev);
412 snd_printk(KERN_ERR "Can't register ac97 bus\n");
413 codec->ac97->dev.bus = NULL;
420 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
422 struct snd_soc_pcm_runtime *rtd = substream->private_data;
423 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
424 struct snd_soc_dai *codec_dai = rtd->codec_dai;
427 if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
428 rtd->dai_link->symmetric_rates) {
429 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
432 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
433 SNDRV_PCM_HW_PARAM_RATE,
438 "Unable to apply rate symmetry constraint: %d\n", ret);
447 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
448 * then initialized and any private data can be allocated. This also calls
449 * startup for the cpu DAI, platform, machine and codec DAI.
451 static int soc_pcm_open(struct snd_pcm_substream *substream)
453 struct snd_soc_pcm_runtime *rtd = substream->private_data;
454 struct snd_pcm_runtime *runtime = substream->runtime;
455 struct snd_soc_platform *platform = rtd->platform;
456 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
457 struct snd_soc_dai *codec_dai = rtd->codec_dai;
458 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
459 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
462 mutex_lock(&pcm_mutex);
464 /* startup the audio subsystem */
465 if (cpu_dai->driver->ops->startup) {
466 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
468 printk(KERN_ERR "asoc: can't open interface %s\n",
474 if (platform->driver->ops->open) {
475 ret = platform->driver->ops->open(substream);
477 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
482 if (codec_dai->driver->ops->startup) {
483 ret = codec_dai->driver->ops->startup(substream, codec_dai);
485 printk(KERN_ERR "asoc: can't open codec %s\n",
491 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
492 ret = rtd->dai_link->ops->startup(substream);
494 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
499 /* Check that the codec and cpu DAI's are compatible */
500 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
501 runtime->hw.rate_min =
502 max(codec_dai_drv->playback.rate_min,
503 cpu_dai_drv->playback.rate_min);
504 runtime->hw.rate_max =
505 min(codec_dai_drv->playback.rate_max,
506 cpu_dai_drv->playback.rate_max);
507 runtime->hw.channels_min =
508 max(codec_dai_drv->playback.channels_min,
509 cpu_dai_drv->playback.channels_min);
510 runtime->hw.channels_max =
511 min(codec_dai_drv->playback.channels_max,
512 cpu_dai_drv->playback.channels_max);
513 runtime->hw.formats =
514 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
516 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
517 if (codec_dai_drv->playback.rates
518 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
519 runtime->hw.rates |= cpu_dai_drv->playback.rates;
520 if (cpu_dai_drv->playback.rates
521 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
522 runtime->hw.rates |= codec_dai_drv->playback.rates;
524 runtime->hw.rate_min =
525 max(codec_dai_drv->capture.rate_min,
526 cpu_dai_drv->capture.rate_min);
527 runtime->hw.rate_max =
528 min(codec_dai_drv->capture.rate_max,
529 cpu_dai_drv->capture.rate_max);
530 runtime->hw.channels_min =
531 max(codec_dai_drv->capture.channels_min,
532 cpu_dai_drv->capture.channels_min);
533 runtime->hw.channels_max =
534 min(codec_dai_drv->capture.channels_max,
535 cpu_dai_drv->capture.channels_max);
536 runtime->hw.formats =
537 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
539 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
540 if (codec_dai_drv->capture.rates
541 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
542 runtime->hw.rates |= cpu_dai_drv->capture.rates;
543 if (cpu_dai_drv->capture.rates
544 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
545 runtime->hw.rates |= codec_dai_drv->capture.rates;
548 snd_pcm_limit_hw_rates(runtime);
549 if (!runtime->hw.rates) {
550 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
551 codec_dai->name, cpu_dai->name);
554 if (!runtime->hw.formats) {
555 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
556 codec_dai->name, cpu_dai->name);
559 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
560 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
561 codec_dai->name, cpu_dai->name);
565 /* Symmetry only applies if we've already got an active stream. */
566 if (cpu_dai->active || codec_dai->active) {
567 ret = soc_pcm_apply_symmetry(substream);
572 pr_debug("asoc: %s <-> %s info:\n",
573 codec_dai->name, cpu_dai->name);
574 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
575 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
576 runtime->hw.channels_max);
577 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
578 runtime->hw.rate_max);
580 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
581 cpu_dai->playback_active++;
582 codec_dai->playback_active++;
584 cpu_dai->capture_active++;
585 codec_dai->capture_active++;
589 rtd->codec->active++;
590 mutex_unlock(&pcm_mutex);
594 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
595 rtd->dai_link->ops->shutdown(substream);
598 if (codec_dai->driver->ops->shutdown)
599 codec_dai->driver->ops->shutdown(substream, codec_dai);
602 if (platform->driver->ops->close)
603 platform->driver->ops->close(substream);
606 if (cpu_dai->driver->ops->shutdown)
607 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
609 mutex_unlock(&pcm_mutex);
614 * Power down the audio subsystem pmdown_time msecs after close is called.
615 * This is to ensure there are no pops or clicks in between any music tracks
616 * due to DAPM power cycling.
618 static void close_delayed_work(struct work_struct *work)
620 struct snd_soc_pcm_runtime *rtd =
621 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
622 struct snd_soc_dai *codec_dai = rtd->codec_dai;
624 mutex_lock(&pcm_mutex);
626 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
627 codec_dai->driver->playback.stream_name,
628 codec_dai->playback_active ? "active" : "inactive",
629 codec_dai->pop_wait ? "yes" : "no");
631 /* are we waiting on this codec DAI stream */
632 if (codec_dai->pop_wait == 1) {
633 codec_dai->pop_wait = 0;
634 snd_soc_dapm_stream_event(rtd,
635 codec_dai->driver->playback.stream_name,
636 SND_SOC_DAPM_STREAM_STOP);
639 mutex_unlock(&pcm_mutex);
643 * Called by ALSA when a PCM substream is closed. Private data can be
644 * freed here. The cpu DAI, codec DAI, machine and platform are also
647 static int soc_codec_close(struct snd_pcm_substream *substream)
649 struct snd_soc_pcm_runtime *rtd = substream->private_data;
650 struct snd_soc_platform *platform = rtd->platform;
651 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
652 struct snd_soc_dai *codec_dai = rtd->codec_dai;
653 struct snd_soc_codec *codec = rtd->codec;
655 mutex_lock(&pcm_mutex);
657 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
658 cpu_dai->playback_active--;
659 codec_dai->playback_active--;
661 cpu_dai->capture_active--;
662 codec_dai->capture_active--;
669 /* Muting the DAC suppresses artifacts caused during digital
670 * shutdown, for example from stopping clocks.
672 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
673 snd_soc_dai_digital_mute(codec_dai, 1);
675 if (cpu_dai->driver->ops->shutdown)
676 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
678 if (codec_dai->driver->ops->shutdown)
679 codec_dai->driver->ops->shutdown(substream, codec_dai);
681 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
682 rtd->dai_link->ops->shutdown(substream);
684 if (platform->driver->ops->close)
685 platform->driver->ops->close(substream);
686 cpu_dai->runtime = NULL;
688 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
689 /* start delayed pop wq here for playback streams */
690 codec_dai->pop_wait = 1;
691 schedule_delayed_work(&rtd->delayed_work,
692 msecs_to_jiffies(rtd->pmdown_time));
694 /* capture streams can be powered down now */
695 snd_soc_dapm_stream_event(rtd,
696 codec_dai->driver->capture.stream_name,
697 SND_SOC_DAPM_STREAM_STOP);
700 mutex_unlock(&pcm_mutex);
705 * Called by ALSA when the PCM substream is prepared, can set format, sample
706 * rate, etc. This function is non atomic and can be called multiple times,
707 * it can refer to the runtime info.
709 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
711 struct snd_soc_pcm_runtime *rtd = substream->private_data;
712 struct snd_soc_platform *platform = rtd->platform;
713 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
714 struct snd_soc_dai *codec_dai = rtd->codec_dai;
717 mutex_lock(&pcm_mutex);
719 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
720 ret = rtd->dai_link->ops->prepare(substream);
722 printk(KERN_ERR "asoc: machine prepare error\n");
727 if (platform->driver->ops->prepare) {
728 ret = platform->driver->ops->prepare(substream);
730 printk(KERN_ERR "asoc: platform prepare error\n");
735 if (codec_dai->driver->ops->prepare) {
736 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
738 printk(KERN_ERR "asoc: codec DAI prepare error\n");
743 if (cpu_dai->driver->ops->prepare) {
744 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
746 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
751 /* cancel any delayed stream shutdown that is pending */
752 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
753 codec_dai->pop_wait) {
754 codec_dai->pop_wait = 0;
755 cancel_delayed_work(&rtd->delayed_work);
758 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
759 snd_soc_dapm_stream_event(rtd,
760 codec_dai->driver->playback.stream_name,
761 SND_SOC_DAPM_STREAM_START);
763 snd_soc_dapm_stream_event(rtd,
764 codec_dai->driver->capture.stream_name,
765 SND_SOC_DAPM_STREAM_START);
767 snd_soc_dai_digital_mute(codec_dai, 0);
770 mutex_unlock(&pcm_mutex);
775 * Called by ALSA when the hardware params are set by application. This
776 * function can also be called multiple times and can allocate buffers
777 * (using snd_pcm_lib_* ). It's non-atomic.
779 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
780 struct snd_pcm_hw_params *params)
782 struct snd_soc_pcm_runtime *rtd = substream->private_data;
783 struct snd_soc_platform *platform = rtd->platform;
784 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
785 struct snd_soc_dai *codec_dai = rtd->codec_dai;
788 mutex_lock(&pcm_mutex);
790 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
791 ret = rtd->dai_link->ops->hw_params(substream, params);
793 printk(KERN_ERR "asoc: machine hw_params failed\n");
798 if (codec_dai->driver->ops->hw_params) {
799 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
801 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
807 if (cpu_dai->driver->ops->hw_params) {
808 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
810 printk(KERN_ERR "asoc: interface %s hw params failed\n",
816 if (platform->driver->ops->hw_params) {
817 ret = platform->driver->ops->hw_params(substream, params);
819 printk(KERN_ERR "asoc: platform %s hw params failed\n",
825 rtd->rate = params_rate(params);
828 mutex_unlock(&pcm_mutex);
832 if (cpu_dai->driver->ops->hw_free)
833 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
836 if (codec_dai->driver->ops->hw_free)
837 codec_dai->driver->ops->hw_free(substream, codec_dai);
840 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
841 rtd->dai_link->ops->hw_free(substream);
843 mutex_unlock(&pcm_mutex);
848 * Free's resources allocated by hw_params, can be called multiple times
850 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
852 struct snd_soc_pcm_runtime *rtd = substream->private_data;
853 struct snd_soc_platform *platform = rtd->platform;
854 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
855 struct snd_soc_dai *codec_dai = rtd->codec_dai;
856 struct snd_soc_codec *codec = rtd->codec;
858 mutex_lock(&pcm_mutex);
860 /* apply codec digital mute */
862 snd_soc_dai_digital_mute(codec_dai, 1);
864 /* free any machine hw params */
865 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
866 rtd->dai_link->ops->hw_free(substream);
868 /* free any DMA resources */
869 if (platform->driver->ops->hw_free)
870 platform->driver->ops->hw_free(substream);
872 /* now free hw params for the DAI's */
873 if (codec_dai->driver->ops->hw_free)
874 codec_dai->driver->ops->hw_free(substream, codec_dai);
876 if (cpu_dai->driver->ops->hw_free)
877 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
879 mutex_unlock(&pcm_mutex);
883 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
885 struct snd_soc_pcm_runtime *rtd = substream->private_data;
886 struct snd_soc_platform *platform = rtd->platform;
887 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
888 struct snd_soc_dai *codec_dai = rtd->codec_dai;
891 if (codec_dai->driver->ops->trigger) {
892 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
897 if (platform->driver->ops->trigger) {
898 ret = platform->driver->ops->trigger(substream, cmd);
903 if (cpu_dai->driver->ops->trigger) {
904 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
912 * soc level wrapper for pointer callback
913 * If cpu_dai, codec_dai, platform driver has the delay callback, than
914 * the runtime->delay will be updated accordingly.
916 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
918 struct snd_soc_pcm_runtime *rtd = substream->private_data;
919 struct snd_soc_platform *platform = rtd->platform;
920 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
921 struct snd_soc_dai *codec_dai = rtd->codec_dai;
922 struct snd_pcm_runtime *runtime = substream->runtime;
923 snd_pcm_uframes_t offset = 0;
924 snd_pcm_sframes_t delay = 0;
926 if (platform->driver->ops->pointer)
927 offset = platform->driver->ops->pointer(substream);
929 if (cpu_dai->driver->ops->delay)
930 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
932 if (codec_dai->driver->ops->delay)
933 delay += codec_dai->driver->ops->delay(substream, codec_dai);
935 if (platform->driver->delay)
936 delay += platform->driver->delay(substream, codec_dai);
938 runtime->delay = delay;
943 /* ASoC PCM operations */
944 static struct snd_pcm_ops soc_pcm_ops = {
945 .open = soc_pcm_open,
946 .close = soc_codec_close,
947 .hw_params = soc_pcm_hw_params,
948 .hw_free = soc_pcm_hw_free,
949 .prepare = soc_pcm_prepare,
950 .trigger = soc_pcm_trigger,
951 .pointer = soc_pcm_pointer,
955 /* powers down audio subsystem for suspend */
956 static int soc_suspend(struct device *dev)
958 struct platform_device *pdev = to_platform_device(dev);
959 struct snd_soc_card *card = platform_get_drvdata(pdev);
962 /* If the initialization of this soc device failed, there is no codec
963 * associated with it. Just bail out in this case.
965 if (list_empty(&card->codec_dev_list))
968 /* Due to the resume being scheduled into a workqueue we could
969 * suspend before that's finished - wait for it to complete.
971 snd_power_lock(card->snd_card);
972 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
973 snd_power_unlock(card->snd_card);
975 /* we're going to block userspace touching us until resume completes */
976 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
978 /* mute any active DAC's */
979 for (i = 0; i < card->num_rtd; i++) {
980 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
981 struct snd_soc_dai_driver *drv = dai->driver;
983 if (card->rtd[i].dai_link->ignore_suspend)
986 if (drv->ops->digital_mute && dai->playback_active)
987 drv->ops->digital_mute(dai, 1);
990 /* suspend all pcms */
991 for (i = 0; i < card->num_rtd; i++) {
992 if (card->rtd[i].dai_link->ignore_suspend)
995 snd_pcm_suspend_all(card->rtd[i].pcm);
998 if (card->suspend_pre)
999 card->suspend_pre(pdev, PMSG_SUSPEND);
1001 for (i = 0; i < card->num_rtd; i++) {
1002 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1003 struct snd_soc_platform *platform = card->rtd[i].platform;
1005 if (card->rtd[i].dai_link->ignore_suspend)
1008 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1009 cpu_dai->driver->suspend(cpu_dai);
1010 if (platform->driver->suspend && !platform->suspended) {
1011 platform->driver->suspend(cpu_dai);
1012 platform->suspended = 1;
1016 /* close any waiting streams and save state */
1017 for (i = 0; i < card->num_rtd; i++) {
1018 run_delayed_work(&card->rtd[i].delayed_work);
1019 card->rtd[i].codec->suspend_bias_level = card->rtd[i].codec->bias_level;
1022 for (i = 0; i < card->num_rtd; i++) {
1023 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1025 if (card->rtd[i].dai_link->ignore_suspend)
1028 if (driver->playback.stream_name != NULL)
1029 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1030 SND_SOC_DAPM_STREAM_SUSPEND);
1032 if (driver->capture.stream_name != NULL)
1033 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1034 SND_SOC_DAPM_STREAM_SUSPEND);
1037 /* suspend all CODECs */
1038 for (i = 0; i < card->num_rtd; i++) {
1039 struct snd_soc_codec *codec = card->rtd[i].codec;
1040 /* If there are paths active then the CODEC will be held with
1041 * bias _ON and should not be suspended. */
1042 if (!codec->suspended && codec->driver->suspend) {
1043 switch (codec->bias_level) {
1044 case SND_SOC_BIAS_STANDBY:
1045 case SND_SOC_BIAS_OFF:
1046 codec->driver->suspend(codec, PMSG_SUSPEND);
1047 codec->suspended = 1;
1050 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1056 for (i = 0; i < card->num_rtd; i++) {
1057 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1059 if (card->rtd[i].dai_link->ignore_suspend)
1062 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1063 cpu_dai->driver->suspend(cpu_dai);
1066 if (card->suspend_post)
1067 card->suspend_post(pdev, PMSG_SUSPEND);
1072 /* deferred resume work, so resume can complete before we finished
1073 * setting our codec back up, which can be very slow on I2C
1075 static void soc_resume_deferred(struct work_struct *work)
1077 struct snd_soc_card *card =
1078 container_of(work, struct snd_soc_card, deferred_resume_work);
1079 struct platform_device *pdev = to_platform_device(card->dev);
1082 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1083 * so userspace apps are blocked from touching us
1086 dev_dbg(card->dev, "starting resume work\n");
1088 /* Bring us up into D2 so that DAPM starts enabling things */
1089 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1091 if (card->resume_pre)
1092 card->resume_pre(pdev);
1094 /* resume AC97 DAIs */
1095 for (i = 0; i < card->num_rtd; i++) {
1096 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1098 if (card->rtd[i].dai_link->ignore_suspend)
1101 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1102 cpu_dai->driver->resume(cpu_dai);
1105 for (i = 0; i < card->num_rtd; i++) {
1106 struct snd_soc_codec *codec = card->rtd[i].codec;
1107 /* If the CODEC was idle over suspend then it will have been
1108 * left with bias OFF or STANDBY and suspended so we must now
1109 * resume. Otherwise the suspend was suppressed.
1111 if (codec->driver->resume && codec->suspended) {
1112 switch (codec->bias_level) {
1113 case SND_SOC_BIAS_STANDBY:
1114 case SND_SOC_BIAS_OFF:
1115 codec->driver->resume(codec);
1116 codec->suspended = 0;
1119 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1125 for (i = 0; i < card->num_rtd; i++) {
1126 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1128 if (card->rtd[i].dai_link->ignore_suspend)
1131 if (driver->playback.stream_name != NULL)
1132 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1133 SND_SOC_DAPM_STREAM_RESUME);
1135 if (driver->capture.stream_name != NULL)
1136 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1137 SND_SOC_DAPM_STREAM_RESUME);
1140 /* unmute any active DACs */
1141 for (i = 0; i < card->num_rtd; i++) {
1142 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1143 struct snd_soc_dai_driver *drv = dai->driver;
1145 if (card->rtd[i].dai_link->ignore_suspend)
1148 if (drv->ops->digital_mute && dai->playback_active)
1149 drv->ops->digital_mute(dai, 0);
1152 for (i = 0; i < card->num_rtd; i++) {
1153 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1154 struct snd_soc_platform *platform = card->rtd[i].platform;
1156 if (card->rtd[i].dai_link->ignore_suspend)
1159 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1160 cpu_dai->driver->resume(cpu_dai);
1161 if (platform->driver->resume && platform->suspended) {
1162 platform->driver->resume(cpu_dai);
1163 platform->suspended = 0;
1167 if (card->resume_post)
1168 card->resume_post(pdev);
1170 dev_dbg(card->dev, "resume work completed\n");
1172 /* userspace can access us now we are back as we were before */
1173 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1176 /* powers up audio subsystem after a suspend */
1177 static int soc_resume(struct device *dev)
1179 struct platform_device *pdev = to_platform_device(dev);
1180 struct snd_soc_card *card = platform_get_drvdata(pdev);
1183 /* AC97 devices might have other drivers hanging off them so
1184 * need to resume immediately. Other drivers don't have that
1185 * problem and may take a substantial amount of time to resume
1186 * due to I/O costs and anti-pop so handle them out of line.
1188 for (i = 0; i < card->num_rtd; i++) {
1189 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1190 if (cpu_dai->driver->ac97_control) {
1191 dev_dbg(dev, "Resuming AC97 immediately\n");
1192 soc_resume_deferred(&card->deferred_resume_work);
1194 dev_dbg(dev, "Scheduling resume work\n");
1195 if (!schedule_work(&card->deferred_resume_work))
1196 dev_err(dev, "resume work item may be lost\n");
1203 #define soc_suspend NULL
1204 #define soc_resume NULL
1207 static struct snd_soc_dai_ops null_dai_ops = {
1210 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1212 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1213 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1214 struct snd_soc_codec *codec;
1215 struct snd_soc_platform *platform;
1216 struct snd_soc_dai *codec_dai, *cpu_dai;
1220 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1222 /* do we already have the CPU DAI for this link ? */
1226 /* no, then find CPU DAI from registered DAIs*/
1227 list_for_each_entry(cpu_dai, &dai_list, list) {
1228 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1230 if (!try_module_get(cpu_dai->dev->driver->owner))
1233 rtd->cpu_dai = cpu_dai;
1237 dev_dbg(card->dev, "CPU DAI %s not registered\n",
1238 dai_link->cpu_dai_name);
1241 /* do we already have the CODEC for this link ? */
1246 /* no, then find CODEC from registered CODECs*/
1247 list_for_each_entry(codec, &codec_list, list) {
1248 if (!strcmp(codec->name, dai_link->codec_name)) {
1251 if (!try_module_get(codec->dev->driver->owner))
1254 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1255 list_for_each_entry(codec_dai, &dai_list, list) {
1256 if (codec->dev == codec_dai->dev &&
1257 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1258 rtd->codec_dai = codec_dai;
1262 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1263 dai_link->codec_dai_name);
1268 dev_dbg(card->dev, "CODEC %s not registered\n",
1269 dai_link->codec_name);
1272 /* do we already have the CODEC DAI for this link ? */
1273 if (rtd->platform) {
1276 /* no, then find CPU DAI from registered DAIs*/
1277 list_for_each_entry(platform, &platform_list, list) {
1278 if (!strcmp(platform->name, dai_link->platform_name)) {
1280 if (!try_module_get(platform->dev->driver->owner))
1283 rtd->platform = platform;
1288 dev_dbg(card->dev, "platform %s not registered\n",
1289 dai_link->platform_name);
1293 /* mark rtd as complete if we found all 4 of our client devices */
1294 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1301 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1303 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1304 struct snd_soc_codec *codec = rtd->codec;
1305 struct snd_soc_platform *platform = rtd->platform;
1306 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1309 /* unregister the rtd device */
1310 if (rtd->dev_registered) {
1311 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1312 device_unregister(&rtd->dev);
1313 rtd->dev_registered = 0;
1316 /* remove the CODEC DAI */
1317 if (codec_dai && codec_dai->probed) {
1318 if (codec_dai->driver->remove) {
1319 err = codec_dai->driver->remove(codec_dai);
1321 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1323 codec_dai->probed = 0;
1324 list_del(&codec_dai->card_list);
1327 /* remove the platform */
1328 if (platform && platform->probed) {
1329 if (platform->driver->remove) {
1330 err = platform->driver->remove(platform);
1332 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1334 platform->probed = 0;
1335 list_del(&platform->card_list);
1336 module_put(platform->dev->driver->owner);
1339 /* remove the CODEC */
1340 if (codec && codec->probed) {
1341 if (codec->driver->remove) {
1342 err = codec->driver->remove(codec);
1344 printk(KERN_ERR "asoc: failed to remove %s\n", codec->name);
1347 /* Make sure all DAPM widgets are freed */
1348 snd_soc_dapm_free(codec);
1350 soc_cleanup_codec_debugfs(codec);
1351 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1353 list_del(&codec->card_list);
1354 module_put(codec->dev->driver->owner);
1357 /* remove the cpu_dai */
1358 if (cpu_dai && cpu_dai->probed) {
1359 if (cpu_dai->driver->remove) {
1360 err = cpu_dai->driver->remove(cpu_dai);
1362 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1364 cpu_dai->probed = 0;
1365 list_del(&cpu_dai->card_list);
1366 module_put(cpu_dai->dev->driver->owner);
1370 static void rtd_release(struct device *dev) {}
1372 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1374 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1375 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1376 struct snd_soc_codec *codec = rtd->codec;
1377 struct snd_soc_platform *platform = rtd->platform;
1378 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1381 dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1383 /* config components */
1384 codec_dai->codec = codec;
1386 cpu_dai->platform = platform;
1388 rtd->dev.parent = card->dev;
1389 codec_dai->card = card;
1390 cpu_dai->card = card;
1392 /* set default power off timeout */
1393 rtd->pmdown_time = pmdown_time;
1395 /* probe the cpu_dai */
1396 if (!cpu_dai->probed) {
1397 if (cpu_dai->driver->probe) {
1398 ret = cpu_dai->driver->probe(cpu_dai);
1400 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1405 cpu_dai->probed = 1;
1406 /* mark cpu_dai as probed and add to card cpu_dai list */
1407 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1410 /* probe the CODEC */
1411 if (!codec->probed) {
1412 if (codec->driver->probe) {
1413 ret = codec->driver->probe(codec);
1415 printk(KERN_ERR "asoc: failed to probe CODEC %s\n",
1421 soc_init_codec_debugfs(codec);
1423 /* mark codec as probed and add to card codec list */
1425 list_add(&codec->card_list, &card->codec_dev_list);
1428 /* probe the platform */
1429 if (!platform->probed) {
1430 if (platform->driver->probe) {
1431 ret = platform->driver->probe(platform);
1433 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1438 /* mark platform as probed and add to card platform list */
1439 platform->probed = 1;
1440 list_add(&platform->card_list, &card->platform_dev_list);
1443 /* probe the CODEC DAI */
1444 if (!codec_dai->probed) {
1445 if (codec_dai->driver->probe) {
1446 ret = codec_dai->driver->probe(codec_dai);
1448 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1454 /* mark cpu_dai as probed and add to card cpu_dai list */
1455 codec_dai->probed = 1;
1456 list_add(&codec_dai->card_list, &card->dai_dev_list);
1459 /* DAPM dai link stream work */
1460 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1462 /* now that all clients have probed, initialise the DAI link */
1463 if (dai_link->init) {
1464 ret = dai_link->init(rtd);
1466 printk(KERN_ERR "asoc: failed to init %s\n", dai_link->stream_name);
1471 /* Make sure all DAPM widgets are instantiated */
1472 snd_soc_dapm_new_widgets(codec);
1473 snd_soc_dapm_sync(codec);
1475 /* register the rtd device */
1476 rtd->dev.release = rtd_release;
1477 rtd->dev.init_name = dai_link->name;
1478 ret = device_register(&rtd->dev);
1480 printk(KERN_ERR "asoc: failed to register DAI runtime device %d\n", ret);
1484 rtd->dev_registered = 1;
1485 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1487 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1489 /* add DAPM sysfs entries for this codec */
1490 ret = snd_soc_dapm_sys_add(&rtd->dev);
1492 printk(KERN_WARNING "asoc: failed to add codec dapm sysfs entries\n");
1494 /* add codec sysfs entries */
1495 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1497 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1499 /* create the pcm */
1500 ret = soc_new_pcm(rtd, num);
1502 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1506 /* add platform data for AC97 devices */
1507 if (rtd->codec_dai->driver->ac97_control)
1508 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1513 #ifdef CONFIG_SND_SOC_AC97_BUS
1514 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1518 /* Only instantiate AC97 if not already done by the adaptor
1519 * for the generic AC97 subsystem.
1521 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1523 * It is possible that the AC97 device is already registered to
1524 * the device subsystem. This happens when the device is created
1525 * via snd_ac97_mixer(). Currently only SoC codec that does so
1526 * is the generic AC97 glue but others migh emerge.
1528 * In those cases we don't try to register the device again.
1530 if (!rtd->codec->ac97_created)
1533 ret = soc_ac97_dev_register(rtd->codec);
1535 printk(KERN_ERR "asoc: AC97 device register failed\n");
1539 rtd->codec->ac97_registered = 1;
1544 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1546 if (codec->ac97_registered) {
1547 soc_ac97_dev_unregister(codec);
1548 codec->ac97_registered = 0;
1553 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1555 struct platform_device *pdev = to_platform_device(card->dev);
1558 mutex_lock(&card->mutex);
1560 if (card->instantiated) {
1561 mutex_unlock(&card->mutex);
1566 for (i = 0; i < card->num_links; i++)
1567 soc_bind_dai_link(card, i);
1569 /* bind completed ? */
1570 if (card->num_rtd != card->num_links) {
1571 mutex_unlock(&card->mutex);
1575 /* card bind complete so register a sound card */
1576 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1577 card->owner, 0, &card->snd_card);
1579 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1581 mutex_unlock(&card->mutex);
1584 card->snd_card->dev = card->dev;
1587 /* deferred resume work */
1588 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1591 /* initialise the sound card only once */
1593 ret = card->probe(pdev);
1595 goto card_probe_error;
1598 for (i = 0; i < card->num_links; i++) {
1599 ret = soc_probe_dai_link(card, i);
1601 pr_err("asoc: failed to instantiate card %s: %d\n",
1607 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1609 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1612 ret = snd_card_register(card->snd_card);
1614 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1618 #ifdef CONFIG_SND_SOC_AC97_BUS
1619 /* register any AC97 codecs */
1620 for (i = 0; i < card->num_rtd; i++) {
1621 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1623 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1629 card->instantiated = 1;
1630 mutex_unlock(&card->mutex);
1634 for (i = 0; i < card->num_links; i++)
1635 soc_remove_dai_link(card, i);
1641 snd_card_free(card->snd_card);
1643 mutex_unlock(&card->mutex);
1647 * Attempt to initialise any uninitialised cards. Must be called with
1650 static void snd_soc_instantiate_cards(void)
1652 struct snd_soc_card *card;
1653 list_for_each_entry(card, &card_list, list)
1654 snd_soc_instantiate_card(card);
1657 /* probes a new socdev */
1658 static int soc_probe(struct platform_device *pdev)
1660 struct snd_soc_card *card = platform_get_drvdata(pdev);
1663 /* Bodge while we unpick instantiation */
1664 card->dev = &pdev->dev;
1665 INIT_LIST_HEAD(&card->dai_dev_list);
1666 INIT_LIST_HEAD(&card->codec_dev_list);
1667 INIT_LIST_HEAD(&card->platform_dev_list);
1669 ret = snd_soc_register_card(card);
1671 dev_err(&pdev->dev, "Failed to register card\n");
1678 /* removes a socdev */
1679 static int soc_remove(struct platform_device *pdev)
1681 struct snd_soc_card *card = platform_get_drvdata(pdev);
1684 if (card->instantiated) {
1686 /* make sure any delayed work runs */
1687 for (i = 0; i < card->num_rtd; i++) {
1688 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1689 run_delayed_work(&rtd->delayed_work);
1692 /* remove and free each DAI */
1693 for (i = 0; i < card->num_rtd; i++)
1694 soc_remove_dai_link(card, i);
1696 /* remove the card */
1701 snd_card_free(card->snd_card);
1703 snd_soc_unregister_card(card);
1707 static int soc_poweroff(struct device *dev)
1709 struct platform_device *pdev = to_platform_device(dev);
1710 struct snd_soc_card *card = platform_get_drvdata(pdev);
1713 if (!card->instantiated)
1716 /* Flush out pmdown_time work - we actually do want to run it
1717 * now, we're shutting down so no imminent restart. */
1718 for (i = 0; i < card->num_rtd; i++) {
1719 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1720 run_delayed_work(&rtd->delayed_work);
1723 snd_soc_dapm_shutdown(card);
1728 static const struct dev_pm_ops soc_pm_ops = {
1729 .suspend = soc_suspend,
1730 .resume = soc_resume,
1731 .poweroff = soc_poweroff,
1734 /* ASoC platform driver */
1735 static struct platform_driver soc_driver = {
1737 .name = "soc-audio",
1738 .owner = THIS_MODULE,
1742 .remove = soc_remove,
1745 /* create a new pcm */
1746 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1748 struct snd_soc_codec *codec = rtd->codec;
1749 struct snd_soc_platform *platform = rtd->platform;
1750 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1751 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1752 struct snd_pcm *pcm;
1754 int ret = 0, playback = 0, capture = 0;
1756 /* check client and interface hw capabilities */
1757 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1758 rtd->dai_link->stream_name, codec_dai->name, num);
1760 if (codec_dai->driver->playback.channels_min)
1762 if (codec_dai->driver->capture.channels_min)
1765 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
1766 ret = snd_pcm_new(rtd->card->snd_card, new_name,
1767 num, playback, capture, &pcm);
1769 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
1774 pcm->private_data = rtd;
1775 soc_pcm_ops.mmap = platform->driver->ops->mmap;
1776 soc_pcm_ops.pointer = platform->driver->ops->pointer;
1777 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
1778 soc_pcm_ops.copy = platform->driver->ops->copy;
1779 soc_pcm_ops.silence = platform->driver->ops->silence;
1780 soc_pcm_ops.ack = platform->driver->ops->ack;
1781 soc_pcm_ops.page = platform->driver->ops->page;
1784 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1787 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1789 ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
1791 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1795 pcm->private_free = platform->driver->pcm_free;
1796 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1802 * snd_soc_codec_volatile_register: Report if a register is volatile.
1804 * @codec: CODEC to query.
1805 * @reg: Register to query.
1807 * Boolean function indiciating if a CODEC register is volatile.
1809 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1811 if (codec->driver->volatile_register)
1812 return codec->driver->volatile_register(reg);
1816 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1819 * snd_soc_new_ac97_codec - initailise AC97 device
1820 * @codec: audio codec
1821 * @ops: AC97 bus operations
1822 * @num: AC97 codec number
1824 * Initialises AC97 codec resources for use by ad-hoc devices only.
1826 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1827 struct snd_ac97_bus_ops *ops, int num)
1829 mutex_lock(&codec->mutex);
1831 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1832 if (codec->ac97 == NULL) {
1833 mutex_unlock(&codec->mutex);
1837 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1838 if (codec->ac97->bus == NULL) {
1841 mutex_unlock(&codec->mutex);
1845 codec->ac97->bus->ops = ops;
1846 codec->ac97->num = num;
1849 * Mark the AC97 device to be created by us. This way we ensure that the
1850 * device will be registered with the device subsystem later on.
1852 codec->ac97_created = 1;
1854 mutex_unlock(&codec->mutex);
1857 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1860 * snd_soc_free_ac97_codec - free AC97 codec device
1861 * @codec: audio codec
1863 * Frees AC97 codec device resources.
1865 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1867 mutex_lock(&codec->mutex);
1868 #ifdef CONFIG_SND_SOC_AC97_BUS
1869 soc_unregister_ac97_dai_link(codec);
1871 kfree(codec->ac97->bus);
1874 codec->ac97_created = 0;
1875 mutex_unlock(&codec->mutex);
1877 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1880 * snd_soc_update_bits - update codec register bits
1881 * @codec: audio codec
1882 * @reg: codec register
1883 * @mask: register mask
1886 * Writes new register value.
1888 * Returns 1 for change else 0.
1890 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1891 unsigned int mask, unsigned int value)
1894 unsigned int old, new;
1896 old = snd_soc_read(codec, reg);
1897 new = (old & ~mask) | value;
1898 change = old != new;
1900 snd_soc_write(codec, reg, new);
1904 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1907 * snd_soc_update_bits_locked - update codec register bits
1908 * @codec: audio codec
1909 * @reg: codec register
1910 * @mask: register mask
1913 * Writes new register value, and takes the codec mutex.
1915 * Returns 1 for change else 0.
1917 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1918 unsigned short reg, unsigned int mask,
1923 mutex_lock(&codec->mutex);
1924 change = snd_soc_update_bits(codec, reg, mask, value);
1925 mutex_unlock(&codec->mutex);
1929 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1932 * snd_soc_test_bits - test register for change
1933 * @codec: audio codec
1934 * @reg: codec register
1935 * @mask: register mask
1938 * Tests a register with a new value and checks if the new value is
1939 * different from the old value.
1941 * Returns 1 for change else 0.
1943 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1944 unsigned int mask, unsigned int value)
1947 unsigned int old, new;
1949 old = snd_soc_read(codec, reg);
1950 new = (old & ~mask) | value;
1951 change = old != new;
1955 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1958 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1959 * @substream: the pcm substream
1960 * @hw: the hardware parameters
1962 * Sets the substream runtime hardware parameters.
1964 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1965 const struct snd_pcm_hardware *hw)
1967 struct snd_pcm_runtime *runtime = substream->runtime;
1968 runtime->hw.info = hw->info;
1969 runtime->hw.formats = hw->formats;
1970 runtime->hw.period_bytes_min = hw->period_bytes_min;
1971 runtime->hw.period_bytes_max = hw->period_bytes_max;
1972 runtime->hw.periods_min = hw->periods_min;
1973 runtime->hw.periods_max = hw->periods_max;
1974 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1975 runtime->hw.fifo_size = hw->fifo_size;
1978 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1981 * snd_soc_cnew - create new control
1982 * @_template: control template
1983 * @data: control private data
1984 * @long_name: control long name
1986 * Create a new mixer control from a template control.
1988 * Returns 0 for success, else error.
1990 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1991 void *data, char *long_name)
1993 struct snd_kcontrol_new template;
1995 memcpy(&template, _template, sizeof(template));
1997 template.name = long_name;
2000 return snd_ctl_new1(&template, data);
2002 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2005 * snd_soc_add_controls - add an array of controls to a codec.
2006 * Convienience function to add a list of controls. Many codecs were
2007 * duplicating this code.
2009 * @codec: codec to add controls to
2010 * @controls: array of controls to add
2011 * @num_controls: number of elements in the array
2013 * Return 0 for success, else error.
2015 int snd_soc_add_controls(struct snd_soc_codec *codec,
2016 const struct snd_kcontrol_new *controls, int num_controls)
2018 struct snd_card *card = codec->card->snd_card;
2021 for (i = 0; i < num_controls; i++) {
2022 const struct snd_kcontrol_new *control = &controls[i];
2023 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
2025 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2026 codec->name, control->name, err);
2033 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2036 * snd_soc_info_enum_double - enumerated double mixer info callback
2037 * @kcontrol: mixer control
2038 * @uinfo: control element information
2040 * Callback to provide information about a double enumerated
2043 * Returns 0 for success.
2045 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2046 struct snd_ctl_elem_info *uinfo)
2048 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2050 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2051 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2052 uinfo->value.enumerated.items = e->max;
2054 if (uinfo->value.enumerated.item > e->max - 1)
2055 uinfo->value.enumerated.item = e->max - 1;
2056 strcpy(uinfo->value.enumerated.name,
2057 e->texts[uinfo->value.enumerated.item]);
2060 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2063 * snd_soc_get_enum_double - enumerated double mixer get callback
2064 * @kcontrol: mixer control
2065 * @ucontrol: control element information
2067 * Callback to get the value of a double enumerated mixer.
2069 * Returns 0 for success.
2071 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2072 struct snd_ctl_elem_value *ucontrol)
2074 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2075 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2076 unsigned int val, bitmask;
2078 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2080 val = snd_soc_read(codec, e->reg);
2081 ucontrol->value.enumerated.item[0]
2082 = (val >> e->shift_l) & (bitmask - 1);
2083 if (e->shift_l != e->shift_r)
2084 ucontrol->value.enumerated.item[1] =
2085 (val >> e->shift_r) & (bitmask - 1);
2089 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2092 * snd_soc_put_enum_double - enumerated double mixer put callback
2093 * @kcontrol: mixer control
2094 * @ucontrol: control element information
2096 * Callback to set the value of a double enumerated mixer.
2098 * Returns 0 for success.
2100 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2101 struct snd_ctl_elem_value *ucontrol)
2103 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2104 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2106 unsigned int mask, bitmask;
2108 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2110 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2112 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2113 mask = (bitmask - 1) << e->shift_l;
2114 if (e->shift_l != e->shift_r) {
2115 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2117 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2118 mask |= (bitmask - 1) << e->shift_r;
2121 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2123 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2126 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2127 * @kcontrol: mixer control
2128 * @ucontrol: control element information
2130 * Callback to get the value of a double semi enumerated mixer.
2132 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2133 * used for handling bitfield coded enumeration for example.
2135 * Returns 0 for success.
2137 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2138 struct snd_ctl_elem_value *ucontrol)
2140 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2141 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2142 unsigned int reg_val, val, mux;
2144 reg_val = snd_soc_read(codec, e->reg);
2145 val = (reg_val >> e->shift_l) & e->mask;
2146 for (mux = 0; mux < e->max; mux++) {
2147 if (val == e->values[mux])
2150 ucontrol->value.enumerated.item[0] = mux;
2151 if (e->shift_l != e->shift_r) {
2152 val = (reg_val >> e->shift_r) & e->mask;
2153 for (mux = 0; mux < e->max; mux++) {
2154 if (val == e->values[mux])
2157 ucontrol->value.enumerated.item[1] = mux;
2162 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2165 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2166 * @kcontrol: mixer control
2167 * @ucontrol: control element information
2169 * Callback to set the value of a double semi enumerated mixer.
2171 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2172 * used for handling bitfield coded enumeration for example.
2174 * Returns 0 for success.
2176 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2177 struct snd_ctl_elem_value *ucontrol)
2179 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2180 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2184 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2186 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2187 mask = e->mask << e->shift_l;
2188 if (e->shift_l != e->shift_r) {
2189 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2191 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2192 mask |= e->mask << e->shift_r;
2195 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2197 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2200 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2201 * @kcontrol: mixer control
2202 * @uinfo: control element information
2204 * Callback to provide information about an external enumerated
2207 * Returns 0 for success.
2209 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2210 struct snd_ctl_elem_info *uinfo)
2212 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2214 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2216 uinfo->value.enumerated.items = e->max;
2218 if (uinfo->value.enumerated.item > e->max - 1)
2219 uinfo->value.enumerated.item = e->max - 1;
2220 strcpy(uinfo->value.enumerated.name,
2221 e->texts[uinfo->value.enumerated.item]);
2224 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2227 * snd_soc_info_volsw_ext - external single mixer info callback
2228 * @kcontrol: mixer control
2229 * @uinfo: control element information
2231 * Callback to provide information about a single external mixer control.
2233 * Returns 0 for success.
2235 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2236 struct snd_ctl_elem_info *uinfo)
2238 int max = kcontrol->private_value;
2240 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2241 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2243 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2246 uinfo->value.integer.min = 0;
2247 uinfo->value.integer.max = max;
2250 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2253 * snd_soc_info_volsw - single mixer info callback
2254 * @kcontrol: mixer control
2255 * @uinfo: control element information
2257 * Callback to provide information about a single mixer control.
2259 * Returns 0 for success.
2261 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2262 struct snd_ctl_elem_info *uinfo)
2264 struct soc_mixer_control *mc =
2265 (struct soc_mixer_control *)kcontrol->private_value;
2267 unsigned int shift = mc->shift;
2268 unsigned int rshift = mc->rshift;
2270 if (!mc->platform_max)
2271 mc->platform_max = mc->max;
2272 platform_max = mc->platform_max;
2274 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2275 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2277 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2279 uinfo->count = shift == rshift ? 1 : 2;
2280 uinfo->value.integer.min = 0;
2281 uinfo->value.integer.max = platform_max;
2284 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2287 * snd_soc_get_volsw - single mixer get callback
2288 * @kcontrol: mixer control
2289 * @ucontrol: control element information
2291 * Callback to get the value of a single mixer control.
2293 * Returns 0 for success.
2295 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2296 struct snd_ctl_elem_value *ucontrol)
2298 struct soc_mixer_control *mc =
2299 (struct soc_mixer_control *)kcontrol->private_value;
2300 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2301 unsigned int reg = mc->reg;
2302 unsigned int shift = mc->shift;
2303 unsigned int rshift = mc->rshift;
2305 unsigned int mask = (1 << fls(max)) - 1;
2306 unsigned int invert = mc->invert;
2308 ucontrol->value.integer.value[0] =
2309 (snd_soc_read(codec, reg) >> shift) & mask;
2310 if (shift != rshift)
2311 ucontrol->value.integer.value[1] =
2312 (snd_soc_read(codec, reg) >> rshift) & mask;
2314 ucontrol->value.integer.value[0] =
2315 max - ucontrol->value.integer.value[0];
2316 if (shift != rshift)
2317 ucontrol->value.integer.value[1] =
2318 max - ucontrol->value.integer.value[1];
2323 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2326 * snd_soc_put_volsw - single mixer put callback
2327 * @kcontrol: mixer control
2328 * @ucontrol: control element information
2330 * Callback to set the value of a single mixer control.
2332 * Returns 0 for success.
2334 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2335 struct snd_ctl_elem_value *ucontrol)
2337 struct soc_mixer_control *mc =
2338 (struct soc_mixer_control *)kcontrol->private_value;
2339 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2340 unsigned int reg = mc->reg;
2341 unsigned int shift = mc->shift;
2342 unsigned int rshift = mc->rshift;
2344 unsigned int mask = (1 << fls(max)) - 1;
2345 unsigned int invert = mc->invert;
2346 unsigned int val, val2, val_mask;
2348 val = (ucontrol->value.integer.value[0] & mask);
2351 val_mask = mask << shift;
2353 if (shift != rshift) {
2354 val2 = (ucontrol->value.integer.value[1] & mask);
2357 val_mask |= mask << rshift;
2358 val |= val2 << rshift;
2360 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2362 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2365 * snd_soc_info_volsw_2r - double mixer info callback
2366 * @kcontrol: mixer control
2367 * @uinfo: control element information
2369 * Callback to provide information about a double mixer control that
2370 * spans 2 codec registers.
2372 * Returns 0 for success.
2374 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2375 struct snd_ctl_elem_info *uinfo)
2377 struct soc_mixer_control *mc =
2378 (struct soc_mixer_control *)kcontrol->private_value;
2381 if (!mc->platform_max)
2382 mc->platform_max = mc->max;
2383 platform_max = mc->platform_max;
2385 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2386 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2388 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2391 uinfo->value.integer.min = 0;
2392 uinfo->value.integer.max = platform_max;
2395 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2398 * snd_soc_get_volsw_2r - double mixer get callback
2399 * @kcontrol: mixer control
2400 * @ucontrol: control element information
2402 * Callback to get the value of a double mixer control that spans 2 registers.
2404 * Returns 0 for success.
2406 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2407 struct snd_ctl_elem_value *ucontrol)
2409 struct soc_mixer_control *mc =
2410 (struct soc_mixer_control *)kcontrol->private_value;
2411 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2412 unsigned int reg = mc->reg;
2413 unsigned int reg2 = mc->rreg;
2414 unsigned int shift = mc->shift;
2416 unsigned int mask = (1 << fls(max)) - 1;
2417 unsigned int invert = mc->invert;
2419 ucontrol->value.integer.value[0] =
2420 (snd_soc_read(codec, reg) >> shift) & mask;
2421 ucontrol->value.integer.value[1] =
2422 (snd_soc_read(codec, reg2) >> shift) & mask;
2424 ucontrol->value.integer.value[0] =
2425 max - ucontrol->value.integer.value[0];
2426 ucontrol->value.integer.value[1] =
2427 max - ucontrol->value.integer.value[1];
2432 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2435 * snd_soc_put_volsw_2r - double mixer set callback
2436 * @kcontrol: mixer control
2437 * @ucontrol: control element information
2439 * Callback to set the value of a double mixer control that spans 2 registers.
2441 * Returns 0 for success.
2443 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2444 struct snd_ctl_elem_value *ucontrol)
2446 struct soc_mixer_control *mc =
2447 (struct soc_mixer_control *)kcontrol->private_value;
2448 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2449 unsigned int reg = mc->reg;
2450 unsigned int reg2 = mc->rreg;
2451 unsigned int shift = mc->shift;
2453 unsigned int mask = (1 << fls(max)) - 1;
2454 unsigned int invert = mc->invert;
2456 unsigned int val, val2, val_mask;
2458 val_mask = mask << shift;
2459 val = (ucontrol->value.integer.value[0] & mask);
2460 val2 = (ucontrol->value.integer.value[1] & mask);
2468 val2 = val2 << shift;
2470 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2474 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2477 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2480 * snd_soc_info_volsw_s8 - signed mixer info callback
2481 * @kcontrol: mixer control
2482 * @uinfo: control element information
2484 * Callback to provide information about a signed mixer control.
2486 * Returns 0 for success.
2488 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2489 struct snd_ctl_elem_info *uinfo)
2491 struct soc_mixer_control *mc =
2492 (struct soc_mixer_control *)kcontrol->private_value;
2496 if (!mc->platform_max)
2497 mc->platform_max = mc->max;
2498 platform_max = mc->platform_max;
2500 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2502 uinfo->value.integer.min = 0;
2503 uinfo->value.integer.max = platform_max - min;
2506 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2509 * snd_soc_get_volsw_s8 - signed mixer get callback
2510 * @kcontrol: mixer control
2511 * @ucontrol: control element information
2513 * Callback to get the value of a signed mixer control.
2515 * Returns 0 for success.
2517 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2518 struct snd_ctl_elem_value *ucontrol)
2520 struct soc_mixer_control *mc =
2521 (struct soc_mixer_control *)kcontrol->private_value;
2522 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2523 unsigned int reg = mc->reg;
2525 int val = snd_soc_read(codec, reg);
2527 ucontrol->value.integer.value[0] =
2528 ((signed char)(val & 0xff))-min;
2529 ucontrol->value.integer.value[1] =
2530 ((signed char)((val >> 8) & 0xff))-min;
2533 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2536 * snd_soc_put_volsw_sgn - signed mixer put callback
2537 * @kcontrol: mixer control
2538 * @ucontrol: control element information
2540 * Callback to set the value of a signed mixer control.
2542 * Returns 0 for success.
2544 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2545 struct snd_ctl_elem_value *ucontrol)
2547 struct soc_mixer_control *mc =
2548 (struct soc_mixer_control *)kcontrol->private_value;
2549 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2550 unsigned int reg = mc->reg;
2554 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2555 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2557 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2559 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2562 * snd_soc_limit_volume - Set new limit to an existing volume control.
2564 * @codec: where to look for the control
2565 * @name: Name of the control
2566 * @max: new maximum limit
2568 * Return 0 for success, else error.
2570 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2571 const char *name, int max)
2573 struct snd_card *card = codec->card->snd_card;
2574 struct snd_kcontrol *kctl;
2575 struct soc_mixer_control *mc;
2579 /* Sanity check for name and max */
2580 if (unlikely(!name || max <= 0))
2583 list_for_each_entry(kctl, &card->controls, list) {
2584 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2590 mc = (struct soc_mixer_control *)kctl->private_value;
2591 if (max <= mc->max) {
2592 mc->platform_max = max;
2598 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2601 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2602 * mixer info callback
2603 * @kcontrol: mixer control
2604 * @uinfo: control element information
2606 * Returns 0 for success.
2608 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2609 struct snd_ctl_elem_info *uinfo)
2611 struct soc_mixer_control *mc =
2612 (struct soc_mixer_control *)kcontrol->private_value;
2616 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2618 uinfo->value.integer.min = 0;
2619 uinfo->value.integer.max = max-min;
2623 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2626 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2627 * mixer get callback
2628 * @kcontrol: mixer control
2629 * @uinfo: control element information
2631 * Returns 0 for success.
2633 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2634 struct snd_ctl_elem_value *ucontrol)
2636 struct soc_mixer_control *mc =
2637 (struct soc_mixer_control *)kcontrol->private_value;
2638 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2639 unsigned int mask = (1<<mc->shift)-1;
2641 int val = snd_soc_read(codec, mc->reg) & mask;
2642 int valr = snd_soc_read(codec, mc->rreg) & mask;
2644 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2645 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2648 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2651 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2652 * mixer put callback
2653 * @kcontrol: mixer control
2654 * @uinfo: control element information
2656 * Returns 0 for success.
2658 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2659 struct snd_ctl_elem_value *ucontrol)
2661 struct soc_mixer_control *mc =
2662 (struct soc_mixer_control *)kcontrol->private_value;
2663 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2664 unsigned int mask = (1<<mc->shift)-1;
2667 unsigned int val, valr, oval, ovalr;
2669 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2671 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2674 oval = snd_soc_read(codec, mc->reg) & mask;
2675 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2679 ret = snd_soc_write(codec, mc->reg, val);
2683 if (ovalr != valr) {
2684 ret = snd_soc_write(codec, mc->rreg, valr);
2691 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2694 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2696 * @clk_id: DAI specific clock ID
2697 * @freq: new clock frequency in Hz
2698 * @dir: new clock direction - input/output.
2700 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2702 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2703 unsigned int freq, int dir)
2705 if (dai->driver && dai->driver->ops->set_sysclk)
2706 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2710 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2713 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2715 * @div_id: DAI specific clock divider ID
2716 * @div: new clock divisor.
2718 * Configures the clock dividers. This is used to derive the best DAI bit and
2719 * frame clocks from the system or master clock. It's best to set the DAI bit
2720 * and frame clocks as low as possible to save system power.
2722 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2723 int div_id, int div)
2725 if (dai->driver && dai->driver->ops->set_clkdiv)
2726 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2730 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2733 * snd_soc_dai_set_pll - configure DAI PLL.
2735 * @pll_id: DAI specific PLL ID
2736 * @source: DAI specific source for the PLL
2737 * @freq_in: PLL input clock frequency in Hz
2738 * @freq_out: requested PLL output clock frequency in Hz
2740 * Configures and enables PLL to generate output clock based on input clock.
2742 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2743 unsigned int freq_in, unsigned int freq_out)
2745 if (dai->driver && dai->driver->ops->set_pll)
2746 return dai->driver->ops->set_pll(dai, pll_id, source,
2751 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2754 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2756 * @fmt: SND_SOC_DAIFMT_ format value.
2758 * Configures the DAI hardware format and clocking.
2760 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2762 if (dai->driver && dai->driver->ops->set_fmt)
2763 return dai->driver->ops->set_fmt(dai, fmt);
2767 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2770 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2772 * @tx_mask: bitmask representing active TX slots.
2773 * @rx_mask: bitmask representing active RX slots.
2774 * @slots: Number of slots in use.
2775 * @slot_width: Width in bits for each slot.
2777 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2780 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2781 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2783 if (dai->driver && dai->driver->ops->set_tdm_slot)
2784 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2789 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2792 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2794 * @tx_num: how many TX channels
2795 * @tx_slot: pointer to an array which imply the TX slot number channel
2797 * @rx_num: how many RX channels
2798 * @rx_slot: pointer to an array which imply the RX slot number channel
2801 * configure the relationship between channel number and TDM slot number.
2803 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2804 unsigned int tx_num, unsigned int *tx_slot,
2805 unsigned int rx_num, unsigned int *rx_slot)
2807 if (dai->driver && dai->driver->ops->set_channel_map)
2808 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2813 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2816 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2818 * @tristate: tristate enable
2820 * Tristates the DAI so that others can use it.
2822 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2824 if (dai->driver && dai->driver->ops->set_tristate)
2825 return dai->driver->ops->set_tristate(dai, tristate);
2829 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2832 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2834 * @mute: mute enable
2836 * Mutes the DAI DAC.
2838 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2840 if (dai->driver && dai->driver->ops->digital_mute)
2841 return dai->driver->ops->digital_mute(dai, mute);
2845 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2848 * snd_soc_register_card - Register a card with the ASoC core
2850 * @card: Card to register
2852 * Note that currently this is an internal only function: it will be
2853 * exposed to machine drivers after further backporting of ASoC v2
2854 * registration APIs.
2856 static int snd_soc_register_card(struct snd_soc_card *card)
2860 if (!card->name || !card->dev)
2863 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) * card->num_links,
2865 if (card->rtd == NULL)
2868 for (i = 0; i < card->num_links; i++)
2869 card->rtd[i].dai_link = &card->dai_link[i];
2871 INIT_LIST_HEAD(&card->list);
2872 card->instantiated = 0;
2873 mutex_init(&card->mutex);
2875 mutex_lock(&client_mutex);
2876 list_add(&card->list, &card_list);
2877 snd_soc_instantiate_cards();
2878 mutex_unlock(&client_mutex);
2880 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2886 * snd_soc_unregister_card - Unregister a card with the ASoC core
2888 * @card: Card to unregister
2890 * Note that currently this is an internal only function: it will be
2891 * exposed to machine drivers after further backporting of ASoC v2
2892 * registration APIs.
2894 static int snd_soc_unregister_card(struct snd_soc_card *card)
2896 mutex_lock(&client_mutex);
2897 list_del(&card->list);
2898 mutex_unlock(&client_mutex);
2899 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2905 * Simplify DAI link configuration by removing ".-1" from device names
2906 * and sanitizing names.
2908 static inline char *fmt_single_name(struct device *dev, int *id)
2910 char *found, name[NAME_SIZE];
2913 if (dev_name(dev) == NULL)
2916 strncpy(name, dev_name(dev), NAME_SIZE);
2918 /* are we a "%s.%d" name (platform and SPI components) */
2919 found = strstr(name, dev->driver->name);
2922 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2924 /* discard ID from name if ID == -1 */
2926 found[strlen(dev->driver->name)] = '\0';
2930 /* I2C component devices are named "bus-addr" */
2931 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2932 char tmp[NAME_SIZE];
2934 /* create unique ID number from I2C addr and bus */
2935 *id = ((id1 & 0xffff) << 16) + id2;
2937 /* sanitize component name for DAI link creation */
2938 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2939 strncpy(name, tmp, NAME_SIZE);
2944 return kstrdup(name, GFP_KERNEL);
2948 * Simplify DAI link naming for single devices with multiple DAIs by removing
2949 * any ".-1" and using the DAI name (instead of device name).
2951 static inline char *fmt_multiple_name(struct device *dev,
2952 struct snd_soc_dai_driver *dai_drv)
2954 if (dai_drv->name == NULL) {
2955 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
2960 return kstrdup(dai_drv->name, GFP_KERNEL);
2964 * snd_soc_register_dai - Register a DAI with the ASoC core
2966 * @dai: DAI to register
2968 int snd_soc_register_dai(struct device *dev,
2969 struct snd_soc_dai_driver *dai_drv)
2971 struct snd_soc_dai *dai;
2973 dev_dbg(dev, "dai register %s\n", dev_name(dev));
2975 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2979 /* create DAI component name */
2980 dai->name = fmt_single_name(dev, &dai->id);
2981 if (dai->name == NULL) {
2987 dai->driver = dai_drv;
2988 if (!dai->driver->ops)
2989 dai->driver->ops = &null_dai_ops;
2991 mutex_lock(&client_mutex);
2992 list_add(&dai->list, &dai_list);
2993 snd_soc_instantiate_cards();
2994 mutex_unlock(&client_mutex);
2996 pr_debug("Registered DAI '%s'\n", dai->name);
3000 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3003 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3005 * @dai: DAI to unregister
3007 void snd_soc_unregister_dai(struct device *dev)
3009 struct snd_soc_dai *dai;
3011 list_for_each_entry(dai, &dai_list, list) {
3012 if (dev == dai->dev)
3018 mutex_lock(&client_mutex);
3019 list_del(&dai->list);
3020 mutex_unlock(&client_mutex);
3022 pr_debug("Unregistered DAI '%s'\n", dai->name);
3026 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3029 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3031 * @dai: Array of DAIs to register
3032 * @count: Number of DAIs
3034 int snd_soc_register_dais(struct device *dev,
3035 struct snd_soc_dai_driver *dai_drv, size_t count)
3037 struct snd_soc_dai *dai;
3040 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3042 for (i = 0; i < count; i++) {
3044 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3048 /* create DAI component name */
3049 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3050 if (dai->name == NULL) {
3057 dai->driver = &dai_drv[i];
3058 if (dai->driver->id)
3059 dai->id = dai->driver->id;
3062 if (!dai->driver->ops)
3063 dai->driver->ops = &null_dai_ops;
3065 mutex_lock(&client_mutex);
3066 list_add(&dai->list, &dai_list);
3067 mutex_unlock(&client_mutex);
3069 pr_debug("Registered DAI '%s'\n", dai->name);
3072 snd_soc_instantiate_cards();
3076 for (i--; i >= 0; i--)
3077 snd_soc_unregister_dai(dev);
3081 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3084 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3086 * @dai: Array of DAIs to unregister
3087 * @count: Number of DAIs
3089 void snd_soc_unregister_dais(struct device *dev, size_t count)
3093 for (i = 0; i < count; i++)
3094 snd_soc_unregister_dai(dev);
3096 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3099 * snd_soc_register_platform - Register a platform with the ASoC core
3101 * @platform: platform to register
3103 int snd_soc_register_platform(struct device *dev,
3104 struct snd_soc_platform_driver *platform_drv)
3106 struct snd_soc_platform *platform;
3108 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3110 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3111 if (platform == NULL)
3114 /* create platform component name */
3115 platform->name = fmt_single_name(dev, &platform->id);
3116 if (platform->name == NULL) {
3121 platform->dev = dev;
3122 platform->driver = platform_drv;
3124 mutex_lock(&client_mutex);
3125 list_add(&platform->list, &platform_list);
3126 snd_soc_instantiate_cards();
3127 mutex_unlock(&client_mutex);
3129 pr_debug("Registered platform '%s'\n", platform->name);
3133 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3136 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3138 * @platform: platform to unregister
3140 void snd_soc_unregister_platform(struct device *dev)
3142 struct snd_soc_platform *platform;
3144 list_for_each_entry(platform, &platform_list, list) {
3145 if (dev == platform->dev)
3151 mutex_lock(&client_mutex);
3152 list_del(&platform->list);
3153 mutex_unlock(&client_mutex);
3155 pr_debug("Unregistered platform '%s'\n", platform->name);
3156 kfree(platform->name);
3159 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3161 static u64 codec_format_map[] = {
3162 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3163 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3164 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3165 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3166 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3167 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3168 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3169 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3170 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3171 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3172 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3173 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3174 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3175 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3176 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3177 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3180 /* Fix up the DAI formats for endianness: codecs don't actually see
3181 * the endianness of the data but we're using the CPU format
3182 * definitions which do need to include endianness so we ensure that
3183 * codec DAIs always have both big and little endian variants set.
3185 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3189 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3190 if (stream->formats & codec_format_map[i])
3191 stream->formats |= codec_format_map[i];
3195 * snd_soc_register_codec - Register a codec with the ASoC core
3197 * @codec: codec to register
3199 int snd_soc_register_codec(struct device *dev,
3200 struct snd_soc_codec_driver *codec_drv,
3201 struct snd_soc_dai_driver *dai_drv, int num_dai)
3203 struct snd_soc_codec *codec;
3206 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3208 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3212 /* create CODEC component name */
3213 codec->name = fmt_single_name(dev, &codec->id);
3214 if (codec->name == NULL) {
3219 /* allocate CODEC register cache */
3220 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3222 if (codec_drv->reg_cache_default)
3223 codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
3224 codec_drv->reg_cache_size * codec_drv->reg_word_size, GFP_KERNEL);
3226 codec->reg_cache = kzalloc(codec_drv->reg_cache_size *
3227 codec_drv->reg_word_size, GFP_KERNEL);
3229 if (codec->reg_cache == NULL) {
3237 codec->driver = codec_drv;
3238 codec->bias_level = SND_SOC_BIAS_OFF;
3239 codec->num_dai = num_dai;
3240 mutex_init(&codec->mutex);
3241 INIT_LIST_HEAD(&codec->dapm_widgets);
3242 INIT_LIST_HEAD(&codec->dapm_paths);
3244 for (i = 0; i < num_dai; i++) {
3245 fixup_codec_formats(&dai_drv[i].playback);
3246 fixup_codec_formats(&dai_drv[i].capture);
3249 /* register any DAIs */
3251 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3256 mutex_lock(&client_mutex);
3257 list_add(&codec->list, &codec_list);
3258 snd_soc_instantiate_cards();
3259 mutex_unlock(&client_mutex);
3261 pr_debug("Registered codec '%s'\n", codec->name);
3265 for (i--; i >= 0; i--)
3266 snd_soc_unregister_dai(dev);
3268 if (codec->reg_cache)
3269 kfree(codec->reg_cache);
3274 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3277 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3279 * @codec: codec to unregister
3281 void snd_soc_unregister_codec(struct device *dev)
3283 struct snd_soc_codec *codec;
3286 list_for_each_entry(codec, &codec_list, list) {
3287 if (dev == codec->dev)
3294 for (i = 0; i < codec->num_dai; i++)
3295 snd_soc_unregister_dai(dev);
3297 mutex_lock(&client_mutex);
3298 list_del(&codec->list);
3299 mutex_unlock(&client_mutex);
3301 pr_debug("Unregistered codec '%s'\n", codec->name);
3303 if (codec->reg_cache)
3304 kfree(codec->reg_cache);
3308 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3310 static int __init snd_soc_init(void)
3312 #ifdef CONFIG_DEBUG_FS
3313 debugfs_root = debugfs_create_dir("asoc", NULL);
3314 if (IS_ERR(debugfs_root) || !debugfs_root) {
3316 "ASoC: Failed to create debugfs directory\n");
3317 debugfs_root = NULL;
3320 if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL,
3322 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3324 if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
3326 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3328 if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
3329 &platform_list_fops))
3330 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3333 return platform_driver_register(&soc_driver);
3335 module_init(snd_soc_init);
3337 static void __exit snd_soc_exit(void)
3339 #ifdef CONFIG_DEBUG_FS
3340 debugfs_remove_recursive(debugfs_root);
3342 platform_driver_unregister(&soc_driver);
3344 module_exit(snd_soc_exit);
3346 /* Module information */
3347 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3348 MODULE_DESCRIPTION("ALSA SoC Core");
3349 MODULE_LICENSE("GPL");
3350 MODULE_ALIAS("platform:soc-audio");