2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 * with code, comments and ideas from :-
9 * Richard Purdie <richard@openedhand.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
17 * o Add hw rules to enforce rates, etc.
18 * o More testing with other codecs/machines.
19 * o Add more codecs and platforms to ensure good API coverage.
20 * o Support TDM on PCM and I2S
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
28 #include <linux/bitops.h>
29 #include <linux/debugfs.h>
30 #include <linux/platform_device.h>
31 #include <sound/ac97_codec.h>
32 #include <sound/core.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/soc.h>
36 #include <sound/soc-dapm.h>
37 #include <sound/initval.h>
39 static DEFINE_MUTEX(pcm_mutex);
40 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry *debugfs_root;
46 static DEFINE_MUTEX(client_mutex);
47 static LIST_HEAD(card_list);
48 static LIST_HEAD(dai_list);
49 static LIST_HEAD(platform_list);
50 static LIST_HEAD(codec_list);
52 static int snd_soc_register_card(struct snd_soc_card *card);
53 static int snd_soc_unregister_card(struct snd_soc_card *card);
56 * This is a timeout to do a DAPM powerdown after a stream is closed().
57 * It can be used to eliminate pops between different playback streams, e.g.
58 * between two audio tracks.
60 static int pmdown_time = 5000;
61 module_param(pmdown_time, int, 0);
62 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
65 * This function forces any delayed work to be queued and run.
67 static int run_delayed_work(struct delayed_work *dwork)
71 /* cancel any work waiting to be queued. */
72 ret = cancel_delayed_work(dwork);
74 /* if there was any work waiting then we run it now and
75 * wait for it's completion */
77 schedule_delayed_work(dwork, 0);
78 flush_scheduled_work();
83 /* codec register dump */
84 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
86 int i, step = 1, count = 0;
88 if (!codec->reg_cache_size)
91 if (codec->reg_cache_step)
92 step = codec->reg_cache_step;
94 count += sprintf(buf, "%s registers\n", codec->name);
95 for (i = 0; i < codec->reg_cache_size; i += step) {
96 if (codec->readable_register && !codec->readable_register(i))
99 count += sprintf(buf + count, "%2x: ", i);
100 if (count >= PAGE_SIZE - 1)
103 if (codec->display_register)
104 count += codec->display_register(codec, buf + count,
105 PAGE_SIZE - count, i);
107 count += snprintf(buf + count, PAGE_SIZE - count,
108 "%4x", codec->read(codec, i));
110 if (count >= PAGE_SIZE - 1)
113 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
114 if (count >= PAGE_SIZE - 1)
118 /* Truncate count; min() would cause a warning */
119 if (count >= PAGE_SIZE)
120 count = PAGE_SIZE - 1;
124 static ssize_t codec_reg_show(struct device *dev,
125 struct device_attribute *attr, char *buf)
127 struct snd_soc_device *devdata = dev_get_drvdata(dev);
128 return soc_codec_reg_show(devdata->card->codec, buf);
131 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
133 static ssize_t pmdown_time_show(struct device *dev,
134 struct device_attribute *attr, char *buf)
136 struct snd_soc_device *socdev = dev_get_drvdata(dev);
137 struct snd_soc_card *card = socdev->card;
139 return sprintf(buf, "%ld\n", card->pmdown_time);
142 static ssize_t pmdown_time_set(struct device *dev,
143 struct device_attribute *attr,
144 const char *buf, size_t count)
146 struct snd_soc_device *socdev = dev_get_drvdata(dev);
147 struct snd_soc_card *card = socdev->card;
149 strict_strtol(buf, 10, &card->pmdown_time);
154 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
156 #ifdef CONFIG_DEBUG_FS
157 static int codec_reg_open_file(struct inode *inode, struct file *file)
159 file->private_data = inode->i_private;
163 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
164 size_t count, loff_t *ppos)
167 struct snd_soc_codec *codec = file->private_data;
168 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
171 ret = soc_codec_reg_show(codec, buf);
173 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
178 static ssize_t codec_reg_write_file(struct file *file,
179 const char __user *user_buf, size_t count, loff_t *ppos)
184 unsigned long reg, value;
186 struct snd_soc_codec *codec = file->private_data;
188 buf_size = min(count, (sizeof(buf)-1));
189 if (copy_from_user(buf, user_buf, buf_size))
193 if (codec->reg_cache_step)
194 step = codec->reg_cache_step;
196 while (*start == ' ')
198 reg = simple_strtoul(start, &start, 16);
199 if ((reg >= codec->reg_cache_size) || (reg % step))
201 while (*start == ' ')
203 if (strict_strtoul(start, 16, &value))
205 codec->write(codec, reg, value);
209 static const struct file_operations codec_reg_fops = {
210 .open = codec_reg_open_file,
211 .read = codec_reg_read_file,
212 .write = codec_reg_write_file,
215 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
217 char codec_root[128];
220 snprintf(codec_root, sizeof(codec_root),
221 "%s.%s", codec->name, dev_name(codec->dev));
223 snprintf(codec_root, sizeof(codec_root),
226 codec->debugfs_codec_root = debugfs_create_dir(codec_root,
228 if (!codec->debugfs_codec_root) {
230 "ASoC: Failed to create codec debugfs directory\n");
234 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
235 codec->debugfs_codec_root,
236 codec, &codec_reg_fops);
237 if (!codec->debugfs_reg)
239 "ASoC: Failed to create codec register debugfs file\n");
241 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
242 codec->debugfs_codec_root,
244 if (!codec->debugfs_pop_time)
246 "Failed to create pop time debugfs file\n");
248 codec->debugfs_dapm = debugfs_create_dir("dapm",
249 codec->debugfs_codec_root);
250 if (!codec->debugfs_dapm)
252 "Failed to create DAPM debugfs directory\n");
254 snd_soc_dapm_debugfs_init(codec);
257 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
259 debugfs_remove_recursive(codec->debugfs_codec_root);
264 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
268 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
273 #ifdef CONFIG_SND_SOC_AC97_BUS
274 /* unregister ac97 codec */
275 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
277 if (codec->ac97->dev.bus)
278 device_unregister(&codec->ac97->dev);
282 /* stop no dev release warning */
283 static void soc_ac97_device_release(struct device *dev){}
285 /* register ac97 codec to bus */
286 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
290 codec->ac97->dev.bus = &ac97_bus_type;
291 codec->ac97->dev.parent = codec->card->dev;
292 codec->ac97->dev.release = soc_ac97_device_release;
294 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
295 codec->card->number, 0, codec->name);
296 err = device_register(&codec->ac97->dev);
298 snd_printk(KERN_ERR "Can't register ac97 bus\n");
299 codec->ac97->dev.bus = NULL;
306 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
308 struct snd_soc_pcm_runtime *rtd = substream->private_data;
309 struct snd_soc_device *socdev = rtd->socdev;
310 struct snd_soc_card *card = socdev->card;
311 struct snd_soc_dai_link *machine = rtd->dai;
312 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
313 struct snd_soc_dai *codec_dai = machine->codec_dai;
316 if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
317 machine->symmetric_rates) {
318 dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
321 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
322 SNDRV_PCM_HW_PARAM_RATE,
327 "Unable to apply rate symmetry constraint: %d\n", ret);
336 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
337 * then initialized and any private data can be allocated. This also calls
338 * startup for the cpu DAI, platform, machine and codec DAI.
340 static int soc_pcm_open(struct snd_pcm_substream *substream)
342 struct snd_soc_pcm_runtime *rtd = substream->private_data;
343 struct snd_soc_device *socdev = rtd->socdev;
344 struct snd_soc_card *card = socdev->card;
345 struct snd_pcm_runtime *runtime = substream->runtime;
346 struct snd_soc_dai_link *machine = rtd->dai;
347 struct snd_soc_platform *platform = card->platform;
348 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
349 struct snd_soc_dai *codec_dai = machine->codec_dai;
352 mutex_lock(&pcm_mutex);
354 /* startup the audio subsystem */
355 if (cpu_dai->ops->startup) {
356 ret = cpu_dai->ops->startup(substream, cpu_dai);
358 printk(KERN_ERR "asoc: can't open interface %s\n",
364 if (platform->pcm_ops->open) {
365 ret = platform->pcm_ops->open(substream);
367 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
372 if (codec_dai->ops->startup) {
373 ret = codec_dai->ops->startup(substream, codec_dai);
375 printk(KERN_ERR "asoc: can't open codec %s\n",
381 if (machine->ops && machine->ops->startup) {
382 ret = machine->ops->startup(substream);
384 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
389 /* Check that the codec and cpu DAI's are compatible */
390 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
391 runtime->hw.rate_min =
392 max(codec_dai->playback.rate_min,
393 cpu_dai->playback.rate_min);
394 runtime->hw.rate_max =
395 min(codec_dai->playback.rate_max,
396 cpu_dai->playback.rate_max);
397 runtime->hw.channels_min =
398 max(codec_dai->playback.channels_min,
399 cpu_dai->playback.channels_min);
400 runtime->hw.channels_max =
401 min(codec_dai->playback.channels_max,
402 cpu_dai->playback.channels_max);
403 runtime->hw.formats =
404 codec_dai->playback.formats & cpu_dai->playback.formats;
406 codec_dai->playback.rates & cpu_dai->playback.rates;
407 if (codec_dai->playback.rates
408 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
409 runtime->hw.rates |= cpu_dai->playback.rates;
410 if (cpu_dai->playback.rates
411 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
412 runtime->hw.rates |= codec_dai->playback.rates;
414 runtime->hw.rate_min =
415 max(codec_dai->capture.rate_min,
416 cpu_dai->capture.rate_min);
417 runtime->hw.rate_max =
418 min(codec_dai->capture.rate_max,
419 cpu_dai->capture.rate_max);
420 runtime->hw.channels_min =
421 max(codec_dai->capture.channels_min,
422 cpu_dai->capture.channels_min);
423 runtime->hw.channels_max =
424 min(codec_dai->capture.channels_max,
425 cpu_dai->capture.channels_max);
426 runtime->hw.formats =
427 codec_dai->capture.formats & cpu_dai->capture.formats;
429 codec_dai->capture.rates & cpu_dai->capture.rates;
430 if (codec_dai->capture.rates
431 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
432 runtime->hw.rates |= cpu_dai->capture.rates;
433 if (cpu_dai->capture.rates
434 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
435 runtime->hw.rates |= codec_dai->capture.rates;
438 snd_pcm_limit_hw_rates(runtime);
439 if (!runtime->hw.rates) {
440 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
441 codec_dai->name, cpu_dai->name);
444 if (!runtime->hw.formats) {
445 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
446 codec_dai->name, cpu_dai->name);
449 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
450 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
451 codec_dai->name, cpu_dai->name);
455 /* Symmetry only applies if we've already got an active stream. */
456 if (cpu_dai->active || codec_dai->active) {
457 ret = soc_pcm_apply_symmetry(substream);
462 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
463 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
464 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
465 runtime->hw.channels_max);
466 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
467 runtime->hw.rate_max);
469 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
470 cpu_dai->playback.active++;
471 codec_dai->playback.active++;
473 cpu_dai->capture.active++;
474 codec_dai->capture.active++;
478 card->codec->active++;
479 mutex_unlock(&pcm_mutex);
483 if (machine->ops && machine->ops->shutdown)
484 machine->ops->shutdown(substream);
487 if (codec_dai->ops->shutdown)
488 codec_dai->ops->shutdown(substream, codec_dai);
491 if (platform->pcm_ops->close)
492 platform->pcm_ops->close(substream);
495 if (cpu_dai->ops->shutdown)
496 cpu_dai->ops->shutdown(substream, cpu_dai);
498 mutex_unlock(&pcm_mutex);
503 * Power down the audio subsystem pmdown_time msecs after close is called.
504 * This is to ensure there are no pops or clicks in between any music tracks
505 * due to DAPM power cycling.
507 static void close_delayed_work(struct work_struct *work)
509 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
511 struct snd_soc_codec *codec = card->codec;
512 struct snd_soc_dai *codec_dai;
515 mutex_lock(&pcm_mutex);
516 for (i = 0; i < codec->num_dai; i++) {
517 codec_dai = &codec->dai[i];
519 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
520 codec_dai->playback.stream_name,
521 codec_dai->playback.active ? "active" : "inactive",
522 codec_dai->pop_wait ? "yes" : "no");
524 /* are we waiting on this codec DAI stream */
525 if (codec_dai->pop_wait == 1) {
526 codec_dai->pop_wait = 0;
527 snd_soc_dapm_stream_event(codec,
528 codec_dai->playback.stream_name,
529 SND_SOC_DAPM_STREAM_STOP);
532 mutex_unlock(&pcm_mutex);
536 * Called by ALSA when a PCM substream is closed. Private data can be
537 * freed here. The cpu DAI, codec DAI, machine and platform are also
540 static int soc_codec_close(struct snd_pcm_substream *substream)
542 struct snd_soc_pcm_runtime *rtd = substream->private_data;
543 struct snd_soc_device *socdev = rtd->socdev;
544 struct snd_soc_card *card = socdev->card;
545 struct snd_soc_dai_link *machine = rtd->dai;
546 struct snd_soc_platform *platform = card->platform;
547 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
548 struct snd_soc_dai *codec_dai = machine->codec_dai;
549 struct snd_soc_codec *codec = card->codec;
551 mutex_lock(&pcm_mutex);
553 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
554 cpu_dai->playback.active--;
555 codec_dai->playback.active--;
557 cpu_dai->capture.active--;
558 codec_dai->capture.active--;
565 /* Muting the DAC suppresses artifacts caused during digital
566 * shutdown, for example from stopping clocks.
568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
569 snd_soc_dai_digital_mute(codec_dai, 1);
571 if (cpu_dai->ops->shutdown)
572 cpu_dai->ops->shutdown(substream, cpu_dai);
574 if (codec_dai->ops->shutdown)
575 codec_dai->ops->shutdown(substream, codec_dai);
577 if (machine->ops && machine->ops->shutdown)
578 machine->ops->shutdown(substream);
580 if (platform->pcm_ops->close)
581 platform->pcm_ops->close(substream);
583 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
584 /* start delayed pop wq here for playback streams */
585 codec_dai->pop_wait = 1;
586 schedule_delayed_work(&card->delayed_work,
587 msecs_to_jiffies(card->pmdown_time));
589 /* capture streams can be powered down now */
590 snd_soc_dapm_stream_event(codec,
591 codec_dai->capture.stream_name,
592 SND_SOC_DAPM_STREAM_STOP);
595 mutex_unlock(&pcm_mutex);
600 * Called by ALSA when the PCM substream is prepared, can set format, sample
601 * rate, etc. This function is non atomic and can be called multiple times,
602 * it can refer to the runtime info.
604 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
606 struct snd_soc_pcm_runtime *rtd = substream->private_data;
607 struct snd_soc_device *socdev = rtd->socdev;
608 struct snd_soc_card *card = socdev->card;
609 struct snd_soc_dai_link *machine = rtd->dai;
610 struct snd_soc_platform *platform = card->platform;
611 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
612 struct snd_soc_dai *codec_dai = machine->codec_dai;
613 struct snd_soc_codec *codec = card->codec;
616 mutex_lock(&pcm_mutex);
618 if (machine->ops && machine->ops->prepare) {
619 ret = machine->ops->prepare(substream);
621 printk(KERN_ERR "asoc: machine prepare error\n");
626 if (platform->pcm_ops->prepare) {
627 ret = platform->pcm_ops->prepare(substream);
629 printk(KERN_ERR "asoc: platform prepare error\n");
634 if (codec_dai->ops->prepare) {
635 ret = codec_dai->ops->prepare(substream, codec_dai);
637 printk(KERN_ERR "asoc: codec DAI prepare error\n");
642 if (cpu_dai->ops->prepare) {
643 ret = cpu_dai->ops->prepare(substream, cpu_dai);
645 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
650 /* cancel any delayed stream shutdown that is pending */
651 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
652 codec_dai->pop_wait) {
653 codec_dai->pop_wait = 0;
654 cancel_delayed_work(&card->delayed_work);
657 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
658 snd_soc_dapm_stream_event(codec,
659 codec_dai->playback.stream_name,
660 SND_SOC_DAPM_STREAM_START);
662 snd_soc_dapm_stream_event(codec,
663 codec_dai->capture.stream_name,
664 SND_SOC_DAPM_STREAM_START);
666 snd_soc_dai_digital_mute(codec_dai, 0);
669 mutex_unlock(&pcm_mutex);
674 * Called by ALSA when the hardware params are set by application. This
675 * function can also be called multiple times and can allocate buffers
676 * (using snd_pcm_lib_* ). It's non-atomic.
678 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
679 struct snd_pcm_hw_params *params)
681 struct snd_soc_pcm_runtime *rtd = substream->private_data;
682 struct snd_soc_device *socdev = rtd->socdev;
683 struct snd_soc_dai_link *machine = rtd->dai;
684 struct snd_soc_card *card = socdev->card;
685 struct snd_soc_platform *platform = card->platform;
686 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
687 struct snd_soc_dai *codec_dai = machine->codec_dai;
690 mutex_lock(&pcm_mutex);
692 if (machine->ops && machine->ops->hw_params) {
693 ret = machine->ops->hw_params(substream, params);
695 printk(KERN_ERR "asoc: machine hw_params failed\n");
700 if (codec_dai->ops->hw_params) {
701 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
703 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
709 if (cpu_dai->ops->hw_params) {
710 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
712 printk(KERN_ERR "asoc: interface %s hw params failed\n",
718 if (platform->pcm_ops->hw_params) {
719 ret = platform->pcm_ops->hw_params(substream, params);
721 printk(KERN_ERR "asoc: platform %s hw params failed\n",
727 machine->rate = params_rate(params);
730 mutex_unlock(&pcm_mutex);
734 if (cpu_dai->ops->hw_free)
735 cpu_dai->ops->hw_free(substream, cpu_dai);
738 if (codec_dai->ops->hw_free)
739 codec_dai->ops->hw_free(substream, codec_dai);
742 if (machine->ops && machine->ops->hw_free)
743 machine->ops->hw_free(substream);
745 mutex_unlock(&pcm_mutex);
750 * Free's resources allocated by hw_params, can be called multiple times
752 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
754 struct snd_soc_pcm_runtime *rtd = substream->private_data;
755 struct snd_soc_device *socdev = rtd->socdev;
756 struct snd_soc_dai_link *machine = rtd->dai;
757 struct snd_soc_card *card = socdev->card;
758 struct snd_soc_platform *platform = card->platform;
759 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
760 struct snd_soc_dai *codec_dai = machine->codec_dai;
761 struct snd_soc_codec *codec = card->codec;
763 mutex_lock(&pcm_mutex);
765 /* apply codec digital mute */
767 snd_soc_dai_digital_mute(codec_dai, 1);
769 /* free any machine hw params */
770 if (machine->ops && machine->ops->hw_free)
771 machine->ops->hw_free(substream);
773 /* free any DMA resources */
774 if (platform->pcm_ops->hw_free)
775 platform->pcm_ops->hw_free(substream);
777 /* now free hw params for the DAI's */
778 if (codec_dai->ops->hw_free)
779 codec_dai->ops->hw_free(substream, codec_dai);
781 if (cpu_dai->ops->hw_free)
782 cpu_dai->ops->hw_free(substream, cpu_dai);
784 mutex_unlock(&pcm_mutex);
788 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
790 struct snd_soc_pcm_runtime *rtd = substream->private_data;
791 struct snd_soc_device *socdev = rtd->socdev;
792 struct snd_soc_card *card= socdev->card;
793 struct snd_soc_dai_link *machine = rtd->dai;
794 struct snd_soc_platform *platform = card->platform;
795 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
796 struct snd_soc_dai *codec_dai = machine->codec_dai;
799 if (codec_dai->ops->trigger) {
800 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
805 if (platform->pcm_ops->trigger) {
806 ret = platform->pcm_ops->trigger(substream, cmd);
811 if (cpu_dai->ops->trigger) {
812 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
820 * soc level wrapper for pointer callback
821 * If cpu_dai, codec_dai, platform driver has the delay callback, than
822 * the runtime->delay will be updated accordingly.
824 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
826 struct snd_soc_pcm_runtime *rtd = substream->private_data;
827 struct snd_soc_device *socdev = rtd->socdev;
828 struct snd_soc_card *card = socdev->card;
829 struct snd_soc_platform *platform = card->platform;
830 struct snd_soc_dai_link *machine = rtd->dai;
831 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
832 struct snd_soc_dai *codec_dai = machine->codec_dai;
833 struct snd_pcm_runtime *runtime = substream->runtime;
834 snd_pcm_uframes_t offset = 0;
835 snd_pcm_sframes_t delay = 0;
837 if (platform->pcm_ops->pointer)
838 offset = platform->pcm_ops->pointer(substream);
840 if (cpu_dai->ops->delay)
841 delay += cpu_dai->ops->delay(substream, cpu_dai);
843 if (codec_dai->ops->delay)
844 delay += codec_dai->ops->delay(substream, codec_dai);
847 delay += platform->delay(substream, codec_dai);
849 runtime->delay = delay;
854 /* ASoC PCM operations */
855 static struct snd_pcm_ops soc_pcm_ops = {
856 .open = soc_pcm_open,
857 .close = soc_codec_close,
858 .hw_params = soc_pcm_hw_params,
859 .hw_free = soc_pcm_hw_free,
860 .prepare = soc_pcm_prepare,
861 .trigger = soc_pcm_trigger,
862 .pointer = soc_pcm_pointer,
866 /* powers down audio subsystem for suspend */
867 static int soc_suspend(struct device *dev)
869 struct platform_device *pdev = to_platform_device(dev);
870 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
871 struct snd_soc_card *card = socdev->card;
872 struct snd_soc_platform *platform = card->platform;
873 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
874 struct snd_soc_codec *codec = card->codec;
877 /* If the initialization of this soc device failed, there is no codec
878 * associated with it. Just bail out in this case.
883 /* Due to the resume being scheduled into a workqueue we could
884 * suspend before that's finished - wait for it to complete.
886 snd_power_lock(codec->card);
887 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
888 snd_power_unlock(codec->card);
890 /* we're going to block userspace touching us until resume completes */
891 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
893 /* mute any active DAC's */
894 for (i = 0; i < card->num_links; i++) {
895 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
896 if (dai->ops->digital_mute && dai->playback.active)
897 dai->ops->digital_mute(dai, 1);
900 /* suspend all pcms */
901 for (i = 0; i < card->num_links; i++)
902 snd_pcm_suspend_all(card->dai_link[i].pcm);
904 if (card->suspend_pre)
905 card->suspend_pre(pdev, PMSG_SUSPEND);
907 for (i = 0; i < card->num_links; i++) {
908 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
909 if (cpu_dai->suspend && !cpu_dai->ac97_control)
910 cpu_dai->suspend(cpu_dai);
911 if (platform->suspend)
912 platform->suspend(&card->dai_link[i]);
915 /* close any waiting streams and save state */
916 run_delayed_work(&card->delayed_work);
917 codec->suspend_bias_level = codec->bias_level;
919 for (i = 0; i < codec->num_dai; i++) {
920 char *stream = codec->dai[i].playback.stream_name;
922 snd_soc_dapm_stream_event(codec, stream,
923 SND_SOC_DAPM_STREAM_SUSPEND);
924 stream = codec->dai[i].capture.stream_name;
926 snd_soc_dapm_stream_event(codec, stream,
927 SND_SOC_DAPM_STREAM_SUSPEND);
930 /* If there are paths active then the CODEC will be held with
931 * bias _ON and should not be suspended. */
932 if (codec_dev->suspend) {
933 switch (codec->bias_level) {
934 case SND_SOC_BIAS_STANDBY:
935 case SND_SOC_BIAS_OFF:
936 codec_dev->suspend(pdev, PMSG_SUSPEND);
939 dev_dbg(socdev->dev, "CODEC is on over suspend\n");
944 for (i = 0; i < card->num_links; i++) {
945 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
946 if (cpu_dai->suspend && cpu_dai->ac97_control)
947 cpu_dai->suspend(cpu_dai);
950 if (card->suspend_post)
951 card->suspend_post(pdev, PMSG_SUSPEND);
956 /* deferred resume work, so resume can complete before we finished
957 * setting our codec back up, which can be very slow on I2C
959 static void soc_resume_deferred(struct work_struct *work)
961 struct snd_soc_card *card = container_of(work,
963 deferred_resume_work);
964 struct snd_soc_device *socdev = card->socdev;
965 struct snd_soc_platform *platform = card->platform;
966 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
967 struct snd_soc_codec *codec = card->codec;
968 struct platform_device *pdev = to_platform_device(socdev->dev);
971 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
972 * so userspace apps are blocked from touching us
975 dev_dbg(socdev->dev, "starting resume work\n");
977 /* Bring us up into D2 so that DAPM starts enabling things */
978 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D2);
980 if (card->resume_pre)
981 card->resume_pre(pdev);
983 for (i = 0; i < card->num_links; i++) {
984 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
985 if (cpu_dai->resume && cpu_dai->ac97_control)
986 cpu_dai->resume(cpu_dai);
989 /* If the CODEC was idle over suspend then it will have been
990 * left with bias OFF or STANDBY and suspended so we must now
991 * resume. Otherwise the suspend was suppressed.
993 if (codec_dev->resume) {
994 switch (codec->bias_level) {
995 case SND_SOC_BIAS_STANDBY:
996 case SND_SOC_BIAS_OFF:
997 codec_dev->resume(pdev);
1000 dev_dbg(socdev->dev, "CODEC was on over suspend\n");
1005 for (i = 0; i < codec->num_dai; i++) {
1006 char *stream = codec->dai[i].playback.stream_name;
1008 snd_soc_dapm_stream_event(codec, stream,
1009 SND_SOC_DAPM_STREAM_RESUME);
1010 stream = codec->dai[i].capture.stream_name;
1012 snd_soc_dapm_stream_event(codec, stream,
1013 SND_SOC_DAPM_STREAM_RESUME);
1016 /* unmute any active DACs */
1017 for (i = 0; i < card->num_links; i++) {
1018 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
1019 if (dai->ops->digital_mute && dai->playback.active)
1020 dai->ops->digital_mute(dai, 0);
1023 for (i = 0; i < card->num_links; i++) {
1024 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1025 if (cpu_dai->resume && !cpu_dai->ac97_control)
1026 cpu_dai->resume(cpu_dai);
1027 if (platform->resume)
1028 platform->resume(&card->dai_link[i]);
1031 if (card->resume_post)
1032 card->resume_post(pdev);
1034 dev_dbg(socdev->dev, "resume work completed\n");
1036 /* userspace can access us now we are back as we were before */
1037 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
1040 /* powers up audio subsystem after a suspend */
1041 static int soc_resume(struct device *dev)
1043 struct platform_device *pdev = to_platform_device(dev);
1044 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1045 struct snd_soc_card *card = socdev->card;
1046 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
1048 /* If the initialization of this soc device failed, there is no codec
1049 * associated with it. Just bail out in this case.
1054 /* AC97 devices might have other drivers hanging off them so
1055 * need to resume immediately. Other drivers don't have that
1056 * problem and may take a substantial amount of time to resume
1057 * due to I/O costs and anti-pop so handle them out of line.
1059 if (cpu_dai->ac97_control) {
1060 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
1061 soc_resume_deferred(&card->deferred_resume_work);
1063 dev_dbg(socdev->dev, "Scheduling resume work\n");
1064 if (!schedule_work(&card->deferred_resume_work))
1065 dev_err(socdev->dev, "resume work item may be lost\n");
1071 #define soc_suspend NULL
1072 #define soc_resume NULL
1075 static struct snd_soc_dai_ops null_dai_ops = {
1078 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1080 struct platform_device *pdev = container_of(card->dev,
1081 struct platform_device,
1083 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
1084 struct snd_soc_codec *codec;
1085 struct snd_soc_platform *platform;
1086 struct snd_soc_dai *dai;
1087 int i, found, ret, ac97;
1089 if (card->instantiated)
1093 list_for_each_entry(platform, &platform_list, list)
1094 if (card->platform == platform) {
1099 dev_dbg(card->dev, "Platform %s not registered\n",
1100 card->platform->name);
1105 for (i = 0; i < card->num_links; i++) {
1107 list_for_each_entry(dai, &dai_list, list)
1108 if (card->dai_link[i].cpu_dai == dai) {
1113 dev_dbg(card->dev, "DAI %s not registered\n",
1114 card->dai_link[i].cpu_dai->name);
1118 if (card->dai_link[i].cpu_dai->ac97_control)
1122 for (i = 0; i < card->num_links; i++) {
1123 if (!card->dai_link[i].codec_dai->ops)
1124 card->dai_link[i].codec_dai->ops = &null_dai_ops;
1127 /* If we have AC97 in the system then don't wait for the
1128 * codec. This will need revisiting if we have to handle
1129 * systems with mixed AC97 and non-AC97 parts. Only check for
1130 * DAIs currently; we can't do this per link since some AC97
1131 * codecs have non-AC97 DAIs.
1134 for (i = 0; i < card->num_links; i++) {
1136 list_for_each_entry(dai, &dai_list, list)
1137 if (card->dai_link[i].codec_dai == dai) {
1142 dev_dbg(card->dev, "DAI %s not registered\n",
1143 card->dai_link[i].codec_dai->name);
1148 /* Note that we do not current check for codec components */
1150 dev_dbg(card->dev, "All components present, instantiating\n");
1152 /* Found everything, bring it up */
1153 card->pmdown_time = pmdown_time;
1156 ret = card->probe(pdev);
1161 for (i = 0; i < card->num_links; i++) {
1162 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1163 if (cpu_dai->probe) {
1164 ret = cpu_dai->probe(pdev, cpu_dai);
1170 if (codec_dev->probe) {
1171 ret = codec_dev->probe(pdev);
1175 codec = card->codec;
1177 if (platform->probe) {
1178 ret = platform->probe(pdev);
1183 /* DAPM stream work */
1184 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
1186 /* deferred resume work */
1187 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1190 for (i = 0; i < card->num_links; i++) {
1191 if (card->dai_link[i].init) {
1192 ret = card->dai_link[i].init(codec);
1194 printk(KERN_ERR "asoc: failed to init %s\n",
1195 card->dai_link[i].stream_name);
1199 if (card->dai_link[i].codec_dai->ac97_control)
1203 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1205 snprintf(codec->card->longname, sizeof(codec->card->longname),
1206 "%s (%s)", card->name, codec->name);
1208 /* Make sure all DAPM widgets are instantiated */
1209 snd_soc_dapm_new_widgets(codec);
1211 ret = snd_card_register(codec->card);
1213 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1218 mutex_lock(&codec->mutex);
1219 #ifdef CONFIG_SND_SOC_AC97_BUS
1220 /* Only instantiate AC97 if not already done by the adaptor
1221 * for the generic AC97 subsystem.
1223 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1224 ret = soc_ac97_dev_register(codec);
1226 printk(KERN_ERR "asoc: AC97 device register failed\n");
1227 snd_card_free(codec->card);
1228 mutex_unlock(&codec->mutex);
1234 ret = snd_soc_dapm_sys_add(card->socdev->dev);
1236 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1238 ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
1240 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1242 ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
1244 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1246 soc_init_codec_debugfs(codec);
1247 mutex_unlock(&codec->mutex);
1249 card->instantiated = 1;
1254 if (platform->remove)
1255 platform->remove(pdev);
1258 if (codec_dev->remove)
1259 codec_dev->remove(pdev);
1262 for (i--; i >= 0; i--) {
1263 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1264 if (cpu_dai->remove)
1265 cpu_dai->remove(pdev, cpu_dai);
1273 * Attempt to initialise any uninitalised cards. Must be called with
1276 static void snd_soc_instantiate_cards(void)
1278 struct snd_soc_card *card;
1279 list_for_each_entry(card, &card_list, list)
1280 snd_soc_instantiate_card(card);
1283 /* probes a new socdev */
1284 static int soc_probe(struct platform_device *pdev)
1287 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1288 struct snd_soc_card *card = socdev->card;
1290 /* Bodge while we push things out of socdev */
1291 card->socdev = socdev;
1293 /* Bodge while we unpick instantiation */
1294 card->dev = &pdev->dev;
1295 ret = snd_soc_register_card(card);
1297 dev_err(&pdev->dev, "Failed to register card\n");
1304 /* removes a socdev */
1305 static int soc_remove(struct platform_device *pdev)
1308 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1309 struct snd_soc_card *card = socdev->card;
1310 struct snd_soc_platform *platform = card->platform;
1311 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1313 if (card->instantiated) {
1314 run_delayed_work(&card->delayed_work);
1316 if (platform->remove)
1317 platform->remove(pdev);
1319 if (codec_dev->remove)
1320 codec_dev->remove(pdev);
1322 for (i = 0; i < card->num_links; i++) {
1323 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1324 if (cpu_dai->remove)
1325 cpu_dai->remove(pdev, cpu_dai);
1332 snd_soc_unregister_card(card);
1337 static int soc_poweroff(struct device *dev)
1339 struct platform_device *pdev = to_platform_device(dev);
1340 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1341 struct snd_soc_card *card = socdev->card;
1343 if (!card->instantiated)
1346 /* Flush out pmdown_time work - we actually do want to run it
1347 * now, we're shutting down so no imminent restart. */
1348 run_delayed_work(&card->delayed_work);
1350 snd_soc_dapm_shutdown(socdev);
1355 static const struct dev_pm_ops soc_pm_ops = {
1356 .suspend = soc_suspend,
1357 .resume = soc_resume,
1358 .poweroff = soc_poweroff,
1361 /* ASoC platform driver */
1362 static struct platform_driver soc_driver = {
1364 .name = "soc-audio",
1365 .owner = THIS_MODULE,
1369 .remove = soc_remove,
1372 /* create a new pcm */
1373 static int soc_new_pcm(struct snd_soc_device *socdev,
1374 struct snd_soc_dai_link *dai_link, int num)
1376 struct snd_soc_card *card = socdev->card;
1377 struct snd_soc_codec *codec = card->codec;
1378 struct snd_soc_platform *platform = card->platform;
1379 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1380 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1381 struct snd_soc_pcm_runtime *rtd;
1382 struct snd_pcm *pcm;
1384 int ret = 0, playback = 0, capture = 0;
1386 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1390 rtd->dai = dai_link;
1391 rtd->socdev = socdev;
1392 codec_dai->codec = card->codec;
1394 /* check client and interface hw capabilities */
1395 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1396 dai_link->stream_name, codec_dai->name, num);
1398 if (codec_dai->playback.channels_min)
1400 if (codec_dai->capture.channels_min)
1403 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1406 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1412 dai_link->pcm = pcm;
1413 pcm->private_data = rtd;
1414 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1415 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1416 soc_pcm_ops.copy = platform->pcm_ops->copy;
1417 soc_pcm_ops.silence = platform->pcm_ops->silence;
1418 soc_pcm_ops.ack = platform->pcm_ops->ack;
1419 soc_pcm_ops.page = platform->pcm_ops->page;
1422 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1425 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1427 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1429 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1434 pcm->private_free = platform->pcm_free;
1435 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1441 * snd_soc_codec_volatile_register: Report if a register is volatile.
1443 * @codec: CODEC to query.
1444 * @reg: Register to query.
1446 * Boolean function indiciating if a CODEC register is volatile.
1448 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1450 if (codec->volatile_register)
1451 return codec->volatile_register(reg);
1455 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1458 * snd_soc_new_ac97_codec - initailise AC97 device
1459 * @codec: audio codec
1460 * @ops: AC97 bus operations
1461 * @num: AC97 codec number
1463 * Initialises AC97 codec resources for use by ad-hoc devices only.
1465 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1466 struct snd_ac97_bus_ops *ops, int num)
1468 mutex_lock(&codec->mutex);
1470 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1471 if (codec->ac97 == NULL) {
1472 mutex_unlock(&codec->mutex);
1476 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1477 if (codec->ac97->bus == NULL) {
1480 mutex_unlock(&codec->mutex);
1484 codec->ac97->bus->ops = ops;
1485 codec->ac97->num = num;
1486 codec->dev = &codec->ac97->dev;
1487 mutex_unlock(&codec->mutex);
1490 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1493 * snd_soc_free_ac97_codec - free AC97 codec device
1494 * @codec: audio codec
1496 * Frees AC97 codec device resources.
1498 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1500 mutex_lock(&codec->mutex);
1501 kfree(codec->ac97->bus);
1504 mutex_unlock(&codec->mutex);
1506 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1509 * snd_soc_update_bits - update codec register bits
1510 * @codec: audio codec
1511 * @reg: codec register
1512 * @mask: register mask
1515 * Writes new register value.
1517 * Returns 1 for change else 0.
1519 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1520 unsigned int mask, unsigned int value)
1523 unsigned int old, new;
1525 old = snd_soc_read(codec, reg);
1526 new = (old & ~mask) | value;
1527 change = old != new;
1529 snd_soc_write(codec, reg, new);
1533 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1536 * snd_soc_update_bits_locked - update codec register bits
1537 * @codec: audio codec
1538 * @reg: codec register
1539 * @mask: register mask
1542 * Writes new register value, and takes the codec mutex.
1544 * Returns 1 for change else 0.
1546 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1547 unsigned short reg, unsigned int mask,
1552 mutex_lock(&codec->mutex);
1553 change = snd_soc_update_bits(codec, reg, mask, value);
1554 mutex_unlock(&codec->mutex);
1558 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1561 * snd_soc_test_bits - test register for change
1562 * @codec: audio codec
1563 * @reg: codec register
1564 * @mask: register mask
1567 * Tests a register with a new value and checks if the new value is
1568 * different from the old value.
1570 * Returns 1 for change else 0.
1572 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1573 unsigned int mask, unsigned int value)
1576 unsigned int old, new;
1578 old = snd_soc_read(codec, reg);
1579 new = (old & ~mask) | value;
1580 change = old != new;
1584 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1587 * snd_soc_new_pcms - create new sound card and pcms
1588 * @socdev: the SoC audio device
1589 * @idx: ALSA card index
1590 * @xid: card identification
1592 * Create a new sound card based upon the codec and interface pcms.
1594 * Returns 0 for success, else error.
1596 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1598 struct snd_soc_card *card = socdev->card;
1599 struct snd_soc_codec *codec = card->codec;
1602 mutex_lock(&codec->mutex);
1604 /* register a sound card */
1605 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1607 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1609 mutex_unlock(&codec->mutex);
1613 codec->socdev = socdev;
1614 codec->card->dev = socdev->dev;
1615 codec->card->private_data = codec;
1616 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1618 /* create the pcms */
1619 for (i = 0; i < card->num_links; i++) {
1620 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1622 printk(KERN_ERR "asoc: can't create pcm %s\n",
1623 card->dai_link[i].stream_name);
1624 mutex_unlock(&codec->mutex);
1627 /* Check for codec->ac97 to handle the ac97.c fun */
1628 if (card->dai_link[i].codec_dai->ac97_control && codec->ac97) {
1629 snd_ac97_dev_add_pdata(codec->ac97,
1630 card->dai_link[i].cpu_dai->ac97_pdata);
1634 mutex_unlock(&codec->mutex);
1637 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1640 * snd_soc_free_pcms - free sound card and pcms
1641 * @socdev: the SoC audio device
1643 * Frees sound card and pcms associated with the socdev.
1644 * Also unregister the codec if it is an AC97 device.
1646 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1648 struct snd_soc_codec *codec = socdev->card->codec;
1649 #ifdef CONFIG_SND_SOC_AC97_BUS
1650 struct snd_soc_dai *codec_dai;
1654 mutex_lock(&codec->mutex);
1655 soc_cleanup_codec_debugfs(codec);
1656 #ifdef CONFIG_SND_SOC_AC97_BUS
1657 for (i = 0; i < codec->num_dai; i++) {
1658 codec_dai = &codec->dai[i];
1659 if (codec_dai->ac97_control && codec->ac97 &&
1660 strcmp(codec->name, "AC97") != 0) {
1661 soc_ac97_dev_unregister(codec);
1669 snd_card_free(codec->card);
1670 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1671 mutex_unlock(&codec->mutex);
1673 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1676 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1677 * @substream: the pcm substream
1678 * @hw: the hardware parameters
1680 * Sets the substream runtime hardware parameters.
1682 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1683 const struct snd_pcm_hardware *hw)
1685 struct snd_pcm_runtime *runtime = substream->runtime;
1686 runtime->hw.info = hw->info;
1687 runtime->hw.formats = hw->formats;
1688 runtime->hw.period_bytes_min = hw->period_bytes_min;
1689 runtime->hw.period_bytes_max = hw->period_bytes_max;
1690 runtime->hw.periods_min = hw->periods_min;
1691 runtime->hw.periods_max = hw->periods_max;
1692 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1693 runtime->hw.fifo_size = hw->fifo_size;
1696 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1699 * snd_soc_cnew - create new control
1700 * @_template: control template
1701 * @data: control private data
1702 * @long_name: control long name
1704 * Create a new mixer control from a template control.
1706 * Returns 0 for success, else error.
1708 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1709 void *data, char *long_name)
1711 struct snd_kcontrol_new template;
1713 memcpy(&template, _template, sizeof(template));
1715 template.name = long_name;
1718 return snd_ctl_new1(&template, data);
1720 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1723 * snd_soc_add_controls - add an array of controls to a codec.
1724 * Convienience function to add a list of controls. Many codecs were
1725 * duplicating this code.
1727 * @codec: codec to add controls to
1728 * @controls: array of controls to add
1729 * @num_controls: number of elements in the array
1731 * Return 0 for success, else error.
1733 int snd_soc_add_controls(struct snd_soc_codec *codec,
1734 const struct snd_kcontrol_new *controls, int num_controls)
1736 struct snd_card *card = codec->card;
1739 for (i = 0; i < num_controls; i++) {
1740 const struct snd_kcontrol_new *control = &controls[i];
1741 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1743 dev_err(codec->dev, "%s: Failed to add %s\n",
1744 codec->name, control->name);
1751 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1754 * snd_soc_info_enum_double - enumerated double mixer info callback
1755 * @kcontrol: mixer control
1756 * @uinfo: control element information
1758 * Callback to provide information about a double enumerated
1761 * Returns 0 for success.
1763 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1764 struct snd_ctl_elem_info *uinfo)
1766 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1768 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1769 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1770 uinfo->value.enumerated.items = e->max;
1772 if (uinfo->value.enumerated.item > e->max - 1)
1773 uinfo->value.enumerated.item = e->max - 1;
1774 strcpy(uinfo->value.enumerated.name,
1775 e->texts[uinfo->value.enumerated.item]);
1778 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1781 * snd_soc_get_enum_double - enumerated double mixer get callback
1782 * @kcontrol: mixer control
1783 * @ucontrol: control element information
1785 * Callback to get the value of a double enumerated mixer.
1787 * Returns 0 for success.
1789 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1790 struct snd_ctl_elem_value *ucontrol)
1792 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1793 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1794 unsigned int val, bitmask;
1796 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1798 val = snd_soc_read(codec, e->reg);
1799 ucontrol->value.enumerated.item[0]
1800 = (val >> e->shift_l) & (bitmask - 1);
1801 if (e->shift_l != e->shift_r)
1802 ucontrol->value.enumerated.item[1] =
1803 (val >> e->shift_r) & (bitmask - 1);
1807 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1810 * snd_soc_put_enum_double - enumerated double mixer put callback
1811 * @kcontrol: mixer control
1812 * @ucontrol: control element information
1814 * Callback to set the value of a double enumerated mixer.
1816 * Returns 0 for success.
1818 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1819 struct snd_ctl_elem_value *ucontrol)
1821 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1822 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1824 unsigned int mask, bitmask;
1826 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1828 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1830 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1831 mask = (bitmask - 1) << e->shift_l;
1832 if (e->shift_l != e->shift_r) {
1833 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1835 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1836 mask |= (bitmask - 1) << e->shift_r;
1839 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1841 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1844 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1845 * @kcontrol: mixer control
1846 * @ucontrol: control element information
1848 * Callback to get the value of a double semi enumerated mixer.
1850 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1851 * used for handling bitfield coded enumeration for example.
1853 * Returns 0 for success.
1855 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1856 struct snd_ctl_elem_value *ucontrol)
1858 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1859 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1860 unsigned int reg_val, val, mux;
1862 reg_val = snd_soc_read(codec, e->reg);
1863 val = (reg_val >> e->shift_l) & e->mask;
1864 for (mux = 0; mux < e->max; mux++) {
1865 if (val == e->values[mux])
1868 ucontrol->value.enumerated.item[0] = mux;
1869 if (e->shift_l != e->shift_r) {
1870 val = (reg_val >> e->shift_r) & e->mask;
1871 for (mux = 0; mux < e->max; mux++) {
1872 if (val == e->values[mux])
1875 ucontrol->value.enumerated.item[1] = mux;
1880 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1883 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1884 * @kcontrol: mixer control
1885 * @ucontrol: control element information
1887 * Callback to set the value of a double semi enumerated mixer.
1889 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1890 * used for handling bitfield coded enumeration for example.
1892 * Returns 0 for success.
1894 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1895 struct snd_ctl_elem_value *ucontrol)
1897 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1898 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1902 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1904 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1905 mask = e->mask << e->shift_l;
1906 if (e->shift_l != e->shift_r) {
1907 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1909 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1910 mask |= e->mask << e->shift_r;
1913 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1915 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1918 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1919 * @kcontrol: mixer control
1920 * @uinfo: control element information
1922 * Callback to provide information about an external enumerated
1925 * Returns 0 for success.
1927 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1928 struct snd_ctl_elem_info *uinfo)
1930 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1932 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1934 uinfo->value.enumerated.items = e->max;
1936 if (uinfo->value.enumerated.item > e->max - 1)
1937 uinfo->value.enumerated.item = e->max - 1;
1938 strcpy(uinfo->value.enumerated.name,
1939 e->texts[uinfo->value.enumerated.item]);
1942 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1945 * snd_soc_info_volsw_ext - external single mixer info callback
1946 * @kcontrol: mixer control
1947 * @uinfo: control element information
1949 * Callback to provide information about a single external mixer control.
1951 * Returns 0 for success.
1953 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1954 struct snd_ctl_elem_info *uinfo)
1956 int max = kcontrol->private_value;
1958 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1959 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1961 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1964 uinfo->value.integer.min = 0;
1965 uinfo->value.integer.max = max;
1968 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1971 * snd_soc_info_volsw - single mixer info callback
1972 * @kcontrol: mixer control
1973 * @uinfo: control element information
1975 * Callback to provide information about a single mixer control.
1977 * Returns 0 for success.
1979 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1980 struct snd_ctl_elem_info *uinfo)
1982 struct soc_mixer_control *mc =
1983 (struct soc_mixer_control *)kcontrol->private_value;
1985 unsigned int shift = mc->shift;
1986 unsigned int rshift = mc->rshift;
1988 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1989 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1991 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1993 uinfo->count = shift == rshift ? 1 : 2;
1994 uinfo->value.integer.min = 0;
1995 uinfo->value.integer.max = max;
1998 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2001 * snd_soc_get_volsw - single mixer get callback
2002 * @kcontrol: mixer control
2003 * @ucontrol: control element information
2005 * Callback to get the value of a single mixer control.
2007 * Returns 0 for success.
2009 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2010 struct snd_ctl_elem_value *ucontrol)
2012 struct soc_mixer_control *mc =
2013 (struct soc_mixer_control *)kcontrol->private_value;
2014 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2015 unsigned int reg = mc->reg;
2016 unsigned int shift = mc->shift;
2017 unsigned int rshift = mc->rshift;
2019 unsigned int mask = (1 << fls(max)) - 1;
2020 unsigned int invert = mc->invert;
2022 ucontrol->value.integer.value[0] =
2023 (snd_soc_read(codec, reg) >> shift) & mask;
2024 if (shift != rshift)
2025 ucontrol->value.integer.value[1] =
2026 (snd_soc_read(codec, reg) >> rshift) & mask;
2028 ucontrol->value.integer.value[0] =
2029 max - ucontrol->value.integer.value[0];
2030 if (shift != rshift)
2031 ucontrol->value.integer.value[1] =
2032 max - ucontrol->value.integer.value[1];
2037 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2040 * snd_soc_put_volsw - single mixer put callback
2041 * @kcontrol: mixer control
2042 * @ucontrol: control element information
2044 * Callback to set the value of a single mixer control.
2046 * Returns 0 for success.
2048 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2049 struct snd_ctl_elem_value *ucontrol)
2051 struct soc_mixer_control *mc =
2052 (struct soc_mixer_control *)kcontrol->private_value;
2053 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2054 unsigned int reg = mc->reg;
2055 unsigned int shift = mc->shift;
2056 unsigned int rshift = mc->rshift;
2058 unsigned int mask = (1 << fls(max)) - 1;
2059 unsigned int invert = mc->invert;
2060 unsigned int val, val2, val_mask;
2062 val = (ucontrol->value.integer.value[0] & mask);
2065 val_mask = mask << shift;
2067 if (shift != rshift) {
2068 val2 = (ucontrol->value.integer.value[1] & mask);
2071 val_mask |= mask << rshift;
2072 val |= val2 << rshift;
2074 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2076 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2079 * snd_soc_info_volsw_2r - double mixer info callback
2080 * @kcontrol: mixer control
2081 * @uinfo: control element information
2083 * Callback to provide information about a double mixer control that
2084 * spans 2 codec registers.
2086 * Returns 0 for success.
2088 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2089 struct snd_ctl_elem_info *uinfo)
2091 struct soc_mixer_control *mc =
2092 (struct soc_mixer_control *)kcontrol->private_value;
2095 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2096 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2098 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2101 uinfo->value.integer.min = 0;
2102 uinfo->value.integer.max = max;
2105 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2108 * snd_soc_get_volsw_2r - double mixer get callback
2109 * @kcontrol: mixer control
2110 * @ucontrol: control element information
2112 * Callback to get the value of a double mixer control that spans 2 registers.
2114 * Returns 0 for success.
2116 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2117 struct snd_ctl_elem_value *ucontrol)
2119 struct soc_mixer_control *mc =
2120 (struct soc_mixer_control *)kcontrol->private_value;
2121 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2122 unsigned int reg = mc->reg;
2123 unsigned int reg2 = mc->rreg;
2124 unsigned int shift = mc->shift;
2126 unsigned int mask = (1 << fls(max)) - 1;
2127 unsigned int invert = mc->invert;
2129 ucontrol->value.integer.value[0] =
2130 (snd_soc_read(codec, reg) >> shift) & mask;
2131 ucontrol->value.integer.value[1] =
2132 (snd_soc_read(codec, reg2) >> shift) & mask;
2134 ucontrol->value.integer.value[0] =
2135 max - ucontrol->value.integer.value[0];
2136 ucontrol->value.integer.value[1] =
2137 max - ucontrol->value.integer.value[1];
2142 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2145 * snd_soc_put_volsw_2r - double mixer set callback
2146 * @kcontrol: mixer control
2147 * @ucontrol: control element information
2149 * Callback to set the value of a double mixer control that spans 2 registers.
2151 * Returns 0 for success.
2153 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2154 struct snd_ctl_elem_value *ucontrol)
2156 struct soc_mixer_control *mc =
2157 (struct soc_mixer_control *)kcontrol->private_value;
2158 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2159 unsigned int reg = mc->reg;
2160 unsigned int reg2 = mc->rreg;
2161 unsigned int shift = mc->shift;
2163 unsigned int mask = (1 << fls(max)) - 1;
2164 unsigned int invert = mc->invert;
2166 unsigned int val, val2, val_mask;
2168 val_mask = mask << shift;
2169 val = (ucontrol->value.integer.value[0] & mask);
2170 val2 = (ucontrol->value.integer.value[1] & mask);
2178 val2 = val2 << shift;
2180 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2184 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2187 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2190 * snd_soc_info_volsw_s8 - signed mixer info callback
2191 * @kcontrol: mixer control
2192 * @uinfo: control element information
2194 * Callback to provide information about a signed mixer control.
2196 * Returns 0 for success.
2198 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2199 struct snd_ctl_elem_info *uinfo)
2201 struct soc_mixer_control *mc =
2202 (struct soc_mixer_control *)kcontrol->private_value;
2206 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2208 uinfo->value.integer.min = 0;
2209 uinfo->value.integer.max = max-min;
2212 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2215 * snd_soc_get_volsw_s8 - signed mixer get callback
2216 * @kcontrol: mixer control
2217 * @ucontrol: control element information
2219 * Callback to get the value of a signed mixer control.
2221 * Returns 0 for success.
2223 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2224 struct snd_ctl_elem_value *ucontrol)
2226 struct soc_mixer_control *mc =
2227 (struct soc_mixer_control *)kcontrol->private_value;
2228 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2229 unsigned int reg = mc->reg;
2231 int val = snd_soc_read(codec, reg);
2233 ucontrol->value.integer.value[0] =
2234 ((signed char)(val & 0xff))-min;
2235 ucontrol->value.integer.value[1] =
2236 ((signed char)((val >> 8) & 0xff))-min;
2239 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2242 * snd_soc_put_volsw_sgn - signed mixer put callback
2243 * @kcontrol: mixer control
2244 * @ucontrol: control element information
2246 * Callback to set the value of a signed mixer control.
2248 * Returns 0 for success.
2250 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2251 struct snd_ctl_elem_value *ucontrol)
2253 struct soc_mixer_control *mc =
2254 (struct soc_mixer_control *)kcontrol->private_value;
2255 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2256 unsigned int reg = mc->reg;
2260 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2261 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2263 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2265 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2268 * snd_soc_limit_volume - Set new limit to an existing volume control.
2270 * @codec: where to look for the control
2271 * @name: Name of the control
2272 * @max: new maximum limit
2274 * Return 0 for success, else error.
2276 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2277 const char *name, int max)
2279 struct snd_card *card = codec->card;
2280 struct snd_kcontrol *kctl;
2281 struct soc_mixer_control *mc;
2285 /* Sanity check for name and max */
2286 if (unlikely(!name || max <= 0))
2289 list_for_each_entry(kctl, &card->controls, list) {
2290 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2296 mc = (struct soc_mixer_control *)kctl->private_value;
2297 if (max <= mc->max) {
2304 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2307 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2309 * @clk_id: DAI specific clock ID
2310 * @freq: new clock frequency in Hz
2311 * @dir: new clock direction - input/output.
2313 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2315 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2316 unsigned int freq, int dir)
2318 if (dai->ops && dai->ops->set_sysclk)
2319 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2323 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2326 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2328 * @div_id: DAI specific clock divider ID
2329 * @div: new clock divisor.
2331 * Configures the clock dividers. This is used to derive the best DAI bit and
2332 * frame clocks from the system or master clock. It's best to set the DAI bit
2333 * and frame clocks as low as possible to save system power.
2335 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2336 int div_id, int div)
2338 if (dai->ops && dai->ops->set_clkdiv)
2339 return dai->ops->set_clkdiv(dai, div_id, div);
2343 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2346 * snd_soc_dai_set_pll - configure DAI PLL.
2348 * @pll_id: DAI specific PLL ID
2349 * @source: DAI specific source for the PLL
2350 * @freq_in: PLL input clock frequency in Hz
2351 * @freq_out: requested PLL output clock frequency in Hz
2353 * Configures and enables PLL to generate output clock based on input clock.
2355 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2356 unsigned int freq_in, unsigned int freq_out)
2358 if (dai->ops && dai->ops->set_pll)
2359 return dai->ops->set_pll(dai, pll_id, source,
2364 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2367 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2369 * @fmt: SND_SOC_DAIFMT_ format value.
2371 * Configures the DAI hardware format and clocking.
2373 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2375 if (dai->ops && dai->ops->set_fmt)
2376 return dai->ops->set_fmt(dai, fmt);
2380 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2383 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2385 * @tx_mask: bitmask representing active TX slots.
2386 * @rx_mask: bitmask representing active RX slots.
2387 * @slots: Number of slots in use.
2388 * @slot_width: Width in bits for each slot.
2390 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2393 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2394 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2396 if (dai->ops && dai->ops->set_tdm_slot)
2397 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2402 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2405 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2407 * @tx_num: how many TX channels
2408 * @tx_slot: pointer to an array which imply the TX slot number channel
2410 * @rx_num: how many RX channels
2411 * @rx_slot: pointer to an array which imply the RX slot number channel
2414 * configure the relationship between channel number and TDM slot number.
2416 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2417 unsigned int tx_num, unsigned int *tx_slot,
2418 unsigned int rx_num, unsigned int *rx_slot)
2420 if (dai->ops && dai->ops->set_channel_map)
2421 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2426 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2429 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2431 * @tristate: tristate enable
2433 * Tristates the DAI so that others can use it.
2435 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2437 if (dai->ops && dai->ops->set_tristate)
2438 return dai->ops->set_tristate(dai, tristate);
2442 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2445 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2447 * @mute: mute enable
2449 * Mutes the DAI DAC.
2451 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2453 if (dai->ops && dai->ops->digital_mute)
2454 return dai->ops->digital_mute(dai, mute);
2458 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2461 * snd_soc_register_card - Register a card with the ASoC core
2463 * @card: Card to register
2465 * Note that currently this is an internal only function: it will be
2466 * exposed to machine drivers after further backporting of ASoC v2
2467 * registration APIs.
2469 static int snd_soc_register_card(struct snd_soc_card *card)
2471 if (!card->name || !card->dev)
2474 INIT_LIST_HEAD(&card->list);
2475 card->instantiated = 0;
2477 mutex_lock(&client_mutex);
2478 list_add(&card->list, &card_list);
2479 snd_soc_instantiate_cards();
2480 mutex_unlock(&client_mutex);
2482 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2488 * snd_soc_unregister_card - Unregister a card with the ASoC core
2490 * @card: Card to unregister
2492 * Note that currently this is an internal only function: it will be
2493 * exposed to machine drivers after further backporting of ASoC v2
2494 * registration APIs.
2496 static int snd_soc_unregister_card(struct snd_soc_card *card)
2498 mutex_lock(&client_mutex);
2499 list_del(&card->list);
2500 mutex_unlock(&client_mutex);
2502 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2508 * snd_soc_register_dai - Register a DAI with the ASoC core
2510 * @dai: DAI to register
2512 int snd_soc_register_dai(struct snd_soc_dai *dai)
2517 /* The device should become mandatory over time */
2519 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2522 dai->ops = &null_dai_ops;
2524 INIT_LIST_HEAD(&dai->list);
2526 mutex_lock(&client_mutex);
2527 list_add(&dai->list, &dai_list);
2528 snd_soc_instantiate_cards();
2529 mutex_unlock(&client_mutex);
2531 pr_debug("Registered DAI '%s'\n", dai->name);
2535 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2538 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2540 * @dai: DAI to unregister
2542 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2544 mutex_lock(&client_mutex);
2545 list_del(&dai->list);
2546 mutex_unlock(&client_mutex);
2548 pr_debug("Unregistered DAI '%s'\n", dai->name);
2550 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2553 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2555 * @dai: Array of DAIs to register
2556 * @count: Number of DAIs
2558 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2562 for (i = 0; i < count; i++) {
2563 ret = snd_soc_register_dai(&dai[i]);
2571 for (i--; i >= 0; i--)
2572 snd_soc_unregister_dai(&dai[i]);
2576 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2579 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2581 * @dai: Array of DAIs to unregister
2582 * @count: Number of DAIs
2584 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2588 for (i = 0; i < count; i++)
2589 snd_soc_unregister_dai(&dai[i]);
2591 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2594 * snd_soc_register_platform - Register a platform with the ASoC core
2596 * @platform: platform to register
2598 int snd_soc_register_platform(struct snd_soc_platform *platform)
2600 if (!platform->name)
2603 INIT_LIST_HEAD(&platform->list);
2605 mutex_lock(&client_mutex);
2606 list_add(&platform->list, &platform_list);
2607 snd_soc_instantiate_cards();
2608 mutex_unlock(&client_mutex);
2610 pr_debug("Registered platform '%s'\n", platform->name);
2614 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2617 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2619 * @platform: platform to unregister
2621 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2623 mutex_lock(&client_mutex);
2624 list_del(&platform->list);
2625 mutex_unlock(&client_mutex);
2627 pr_debug("Unregistered platform '%s'\n", platform->name);
2629 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2631 static u64 codec_format_map[] = {
2632 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2633 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2634 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2635 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2636 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2637 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2638 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2639 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2640 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2641 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2642 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2643 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2644 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2645 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2646 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2647 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2650 /* Fix up the DAI formats for endianness: codecs don't actually see
2651 * the endianness of the data but we're using the CPU format
2652 * definitions which do need to include endianness so we ensure that
2653 * codec DAIs always have both big and little endian variants set.
2655 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2659 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2660 if (stream->formats & codec_format_map[i])
2661 stream->formats |= codec_format_map[i];
2665 * snd_soc_register_codec - Register a codec with the ASoC core
2667 * @codec: codec to register
2669 int snd_soc_register_codec(struct snd_soc_codec *codec)
2676 /* The device should become mandatory over time */
2678 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2680 INIT_LIST_HEAD(&codec->list);
2682 for (i = 0; i < codec->num_dai; i++) {
2683 fixup_codec_formats(&codec->dai[i].playback);
2684 fixup_codec_formats(&codec->dai[i].capture);
2687 mutex_lock(&client_mutex);
2688 list_add(&codec->list, &codec_list);
2689 snd_soc_instantiate_cards();
2690 mutex_unlock(&client_mutex);
2692 pr_debug("Registered codec '%s'\n", codec->name);
2696 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2699 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2701 * @codec: codec to unregister
2703 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2705 mutex_lock(&client_mutex);
2706 list_del(&codec->list);
2707 mutex_unlock(&client_mutex);
2709 pr_debug("Unregistered codec '%s'\n", codec->name);
2711 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2713 static int __init snd_soc_init(void)
2715 #ifdef CONFIG_DEBUG_FS
2716 debugfs_root = debugfs_create_dir("asoc", NULL);
2717 if (IS_ERR(debugfs_root) || !debugfs_root) {
2719 "ASoC: Failed to create debugfs directory\n");
2720 debugfs_root = NULL;
2724 return platform_driver_register(&soc_driver);
2727 static void __exit snd_soc_exit(void)
2729 #ifdef CONFIG_DEBUG_FS
2730 debugfs_remove_recursive(debugfs_root);
2732 platform_driver_unregister(&soc_driver);
2735 module_init(snd_soc_init);
2736 module_exit(snd_soc_exit);
2738 /* Module information */
2739 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2740 MODULE_DESCRIPTION("ALSA SoC Core");
2741 MODULE_LICENSE("GPL");
2742 MODULE_ALIAS("platform:soc-audio");