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;
897 if (card->dai_link[i].ignore_suspend)
900 if (dai->ops->digital_mute && dai->playback.active)
901 dai->ops->digital_mute(dai, 1);
904 /* suspend all pcms */
905 for (i = 0; i < card->num_links; i++) {
906 if (card->dai_link[i].ignore_suspend)
909 snd_pcm_suspend_all(card->dai_link[i].pcm);
912 if (card->suspend_pre)
913 card->suspend_pre(pdev, PMSG_SUSPEND);
915 for (i = 0; i < card->num_links; i++) {
916 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
918 if (card->dai_link[i].ignore_suspend)
921 if (cpu_dai->suspend && !cpu_dai->ac97_control)
922 cpu_dai->suspend(cpu_dai);
923 if (platform->suspend)
924 platform->suspend(&card->dai_link[i]);
927 /* close any waiting streams and save state */
928 run_delayed_work(&card->delayed_work);
929 codec->suspend_bias_level = codec->bias_level;
931 for (i = 0; i < codec->num_dai; i++) {
932 char *stream = codec->dai[i].playback.stream_name;
934 if (card->dai_link[i].ignore_suspend)
938 snd_soc_dapm_stream_event(codec, stream,
939 SND_SOC_DAPM_STREAM_SUSPEND);
940 stream = codec->dai[i].capture.stream_name;
942 snd_soc_dapm_stream_event(codec, stream,
943 SND_SOC_DAPM_STREAM_SUSPEND);
946 /* If there are paths active then the CODEC will be held with
947 * bias _ON and should not be suspended. */
948 if (codec_dev->suspend) {
949 switch (codec->bias_level) {
950 case SND_SOC_BIAS_STANDBY:
951 case SND_SOC_BIAS_OFF:
952 codec_dev->suspend(pdev, PMSG_SUSPEND);
955 dev_dbg(socdev->dev, "CODEC is on over suspend\n");
960 for (i = 0; i < card->num_links; i++) {
961 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
963 if (card->dai_link[i].ignore_suspend)
966 if (cpu_dai->suspend && cpu_dai->ac97_control)
967 cpu_dai->suspend(cpu_dai);
970 if (card->suspend_post)
971 card->suspend_post(pdev, PMSG_SUSPEND);
976 /* deferred resume work, so resume can complete before we finished
977 * setting our codec back up, which can be very slow on I2C
979 static void soc_resume_deferred(struct work_struct *work)
981 struct snd_soc_card *card = container_of(work,
983 deferred_resume_work);
984 struct snd_soc_device *socdev = card->socdev;
985 struct snd_soc_platform *platform = card->platform;
986 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
987 struct snd_soc_codec *codec = card->codec;
988 struct platform_device *pdev = to_platform_device(socdev->dev);
991 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
992 * so userspace apps are blocked from touching us
995 dev_dbg(socdev->dev, "starting resume work\n");
997 /* Bring us up into D2 so that DAPM starts enabling things */
998 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D2);
1000 if (card->resume_pre)
1001 card->resume_pre(pdev);
1003 for (i = 0; i < card->num_links; i++) {
1004 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1006 if (card->dai_link[i].ignore_suspend)
1009 if (cpu_dai->resume && cpu_dai->ac97_control)
1010 cpu_dai->resume(cpu_dai);
1013 /* If the CODEC was idle over suspend then it will have been
1014 * left with bias OFF or STANDBY and suspended so we must now
1015 * resume. Otherwise the suspend was suppressed.
1017 if (codec_dev->resume) {
1018 switch (codec->bias_level) {
1019 case SND_SOC_BIAS_STANDBY:
1020 case SND_SOC_BIAS_OFF:
1021 codec_dev->resume(pdev);
1024 dev_dbg(socdev->dev, "CODEC was on over suspend\n");
1029 for (i = 0; i < codec->num_dai; i++) {
1030 char *stream = codec->dai[i].playback.stream_name;
1032 if (card->dai_link[i].ignore_suspend)
1036 snd_soc_dapm_stream_event(codec, stream,
1037 SND_SOC_DAPM_STREAM_RESUME);
1038 stream = codec->dai[i].capture.stream_name;
1040 snd_soc_dapm_stream_event(codec, stream,
1041 SND_SOC_DAPM_STREAM_RESUME);
1044 /* unmute any active DACs */
1045 for (i = 0; i < card->num_links; i++) {
1046 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
1048 if (card->dai_link[i].ignore_suspend)
1051 if (dai->ops->digital_mute && dai->playback.active)
1052 dai->ops->digital_mute(dai, 0);
1055 for (i = 0; i < card->num_links; i++) {
1056 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1058 if (card->dai_link[i].ignore_suspend)
1061 if (cpu_dai->resume && !cpu_dai->ac97_control)
1062 cpu_dai->resume(cpu_dai);
1063 if (platform->resume)
1064 platform->resume(&card->dai_link[i]);
1067 if (card->resume_post)
1068 card->resume_post(pdev);
1070 dev_dbg(socdev->dev, "resume work completed\n");
1072 /* userspace can access us now we are back as we were before */
1073 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
1076 /* powers up audio subsystem after a suspend */
1077 static int soc_resume(struct device *dev)
1079 struct platform_device *pdev = to_platform_device(dev);
1080 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1081 struct snd_soc_card *card = socdev->card;
1082 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
1084 /* If the initialization of this soc device failed, there is no codec
1085 * associated with it. Just bail out in this case.
1090 /* AC97 devices might have other drivers hanging off them so
1091 * need to resume immediately. Other drivers don't have that
1092 * problem and may take a substantial amount of time to resume
1093 * due to I/O costs and anti-pop so handle them out of line.
1095 if (cpu_dai->ac97_control) {
1096 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
1097 soc_resume_deferred(&card->deferred_resume_work);
1099 dev_dbg(socdev->dev, "Scheduling resume work\n");
1100 if (!schedule_work(&card->deferred_resume_work))
1101 dev_err(socdev->dev, "resume work item may be lost\n");
1107 #define soc_suspend NULL
1108 #define soc_resume NULL
1111 static struct snd_soc_dai_ops null_dai_ops = {
1114 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1116 struct platform_device *pdev = container_of(card->dev,
1117 struct platform_device,
1119 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
1120 struct snd_soc_codec *codec;
1121 struct snd_soc_platform *platform;
1122 struct snd_soc_dai *dai;
1123 int i, found, ret, ac97;
1125 if (card->instantiated)
1129 list_for_each_entry(platform, &platform_list, list)
1130 if (card->platform == platform) {
1135 dev_dbg(card->dev, "Platform %s not registered\n",
1136 card->platform->name);
1141 for (i = 0; i < card->num_links; i++) {
1143 list_for_each_entry(dai, &dai_list, list)
1144 if (card->dai_link[i].cpu_dai == dai) {
1149 dev_dbg(card->dev, "DAI %s not registered\n",
1150 card->dai_link[i].cpu_dai->name);
1154 if (card->dai_link[i].cpu_dai->ac97_control)
1158 for (i = 0; i < card->num_links; i++) {
1159 if (!card->dai_link[i].codec_dai->ops)
1160 card->dai_link[i].codec_dai->ops = &null_dai_ops;
1163 /* If we have AC97 in the system then don't wait for the
1164 * codec. This will need revisiting if we have to handle
1165 * systems with mixed AC97 and non-AC97 parts. Only check for
1166 * DAIs currently; we can't do this per link since some AC97
1167 * codecs have non-AC97 DAIs.
1170 for (i = 0; i < card->num_links; i++) {
1172 list_for_each_entry(dai, &dai_list, list)
1173 if (card->dai_link[i].codec_dai == dai) {
1178 dev_dbg(card->dev, "DAI %s not registered\n",
1179 card->dai_link[i].codec_dai->name);
1184 /* Note that we do not current check for codec components */
1186 dev_dbg(card->dev, "All components present, instantiating\n");
1188 /* Found everything, bring it up */
1189 card->pmdown_time = pmdown_time;
1192 ret = card->probe(pdev);
1197 for (i = 0; i < card->num_links; i++) {
1198 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1199 if (cpu_dai->probe) {
1200 ret = cpu_dai->probe(pdev, cpu_dai);
1206 if (codec_dev->probe) {
1207 ret = codec_dev->probe(pdev);
1211 codec = card->codec;
1213 if (platform->probe) {
1214 ret = platform->probe(pdev);
1219 /* DAPM stream work */
1220 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
1222 /* deferred resume work */
1223 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1226 for (i = 0; i < card->num_links; i++) {
1227 if (card->dai_link[i].init) {
1228 ret = card->dai_link[i].init(codec);
1230 printk(KERN_ERR "asoc: failed to init %s\n",
1231 card->dai_link[i].stream_name);
1235 if (card->dai_link[i].codec_dai->ac97_control)
1239 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1241 snprintf(codec->card->longname, sizeof(codec->card->longname),
1242 "%s (%s)", card->name, codec->name);
1244 /* Make sure all DAPM widgets are instantiated */
1245 snd_soc_dapm_new_widgets(codec);
1247 ret = snd_card_register(codec->card);
1249 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1254 mutex_lock(&codec->mutex);
1255 #ifdef CONFIG_SND_SOC_AC97_BUS
1256 /* Only instantiate AC97 if not already done by the adaptor
1257 * for the generic AC97 subsystem.
1259 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1260 ret = soc_ac97_dev_register(codec);
1262 printk(KERN_ERR "asoc: AC97 device register failed\n");
1263 snd_card_free(codec->card);
1264 mutex_unlock(&codec->mutex);
1270 ret = snd_soc_dapm_sys_add(card->socdev->dev);
1272 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1274 ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
1276 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1278 ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
1280 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1282 soc_init_codec_debugfs(codec);
1283 mutex_unlock(&codec->mutex);
1285 card->instantiated = 1;
1290 if (platform->remove)
1291 platform->remove(pdev);
1294 if (codec_dev->remove)
1295 codec_dev->remove(pdev);
1298 for (i--; i >= 0; i--) {
1299 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1300 if (cpu_dai->remove)
1301 cpu_dai->remove(pdev, cpu_dai);
1309 * Attempt to initialise any uninitalised cards. Must be called with
1312 static void snd_soc_instantiate_cards(void)
1314 struct snd_soc_card *card;
1315 list_for_each_entry(card, &card_list, list)
1316 snd_soc_instantiate_card(card);
1319 /* probes a new socdev */
1320 static int soc_probe(struct platform_device *pdev)
1323 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1324 struct snd_soc_card *card = socdev->card;
1326 /* Bodge while we push things out of socdev */
1327 card->socdev = socdev;
1329 /* Bodge while we unpick instantiation */
1330 card->dev = &pdev->dev;
1331 ret = snd_soc_register_card(card);
1333 dev_err(&pdev->dev, "Failed to register card\n");
1340 /* removes a socdev */
1341 static int soc_remove(struct platform_device *pdev)
1344 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1345 struct snd_soc_card *card = socdev->card;
1346 struct snd_soc_platform *platform = card->platform;
1347 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1349 if (card->instantiated) {
1350 run_delayed_work(&card->delayed_work);
1352 if (platform->remove)
1353 platform->remove(pdev);
1355 if (codec_dev->remove)
1356 codec_dev->remove(pdev);
1358 for (i = 0; i < card->num_links; i++) {
1359 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1360 if (cpu_dai->remove)
1361 cpu_dai->remove(pdev, cpu_dai);
1368 snd_soc_unregister_card(card);
1373 static int soc_poweroff(struct device *dev)
1375 struct platform_device *pdev = to_platform_device(dev);
1376 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1377 struct snd_soc_card *card = socdev->card;
1379 if (!card->instantiated)
1382 /* Flush out pmdown_time work - we actually do want to run it
1383 * now, we're shutting down so no imminent restart. */
1384 run_delayed_work(&card->delayed_work);
1386 snd_soc_dapm_shutdown(socdev);
1391 static const struct dev_pm_ops soc_pm_ops = {
1392 .suspend = soc_suspend,
1393 .resume = soc_resume,
1394 .poweroff = soc_poweroff,
1397 /* ASoC platform driver */
1398 static struct platform_driver soc_driver = {
1400 .name = "soc-audio",
1401 .owner = THIS_MODULE,
1405 .remove = soc_remove,
1408 /* create a new pcm */
1409 static int soc_new_pcm(struct snd_soc_device *socdev,
1410 struct snd_soc_dai_link *dai_link, int num)
1412 struct snd_soc_card *card = socdev->card;
1413 struct snd_soc_codec *codec = card->codec;
1414 struct snd_soc_platform *platform = card->platform;
1415 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1416 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1417 struct snd_soc_pcm_runtime *rtd;
1418 struct snd_pcm *pcm;
1420 int ret = 0, playback = 0, capture = 0;
1422 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1426 rtd->dai = dai_link;
1427 rtd->socdev = socdev;
1428 codec_dai->codec = card->codec;
1430 /* check client and interface hw capabilities */
1431 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1432 dai_link->stream_name, codec_dai->name, num);
1434 if (codec_dai->playback.channels_min)
1436 if (codec_dai->capture.channels_min)
1439 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1442 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1448 dai_link->pcm = pcm;
1449 pcm->private_data = rtd;
1450 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1451 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1452 soc_pcm_ops.copy = platform->pcm_ops->copy;
1453 soc_pcm_ops.silence = platform->pcm_ops->silence;
1454 soc_pcm_ops.ack = platform->pcm_ops->ack;
1455 soc_pcm_ops.page = platform->pcm_ops->page;
1458 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1461 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1463 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1465 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1470 pcm->private_free = platform->pcm_free;
1471 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1477 * snd_soc_codec_volatile_register: Report if a register is volatile.
1479 * @codec: CODEC to query.
1480 * @reg: Register to query.
1482 * Boolean function indiciating if a CODEC register is volatile.
1484 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1486 if (codec->volatile_register)
1487 return codec->volatile_register(reg);
1491 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1494 * snd_soc_new_ac97_codec - initailise AC97 device
1495 * @codec: audio codec
1496 * @ops: AC97 bus operations
1497 * @num: AC97 codec number
1499 * Initialises AC97 codec resources for use by ad-hoc devices only.
1501 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1502 struct snd_ac97_bus_ops *ops, int num)
1504 mutex_lock(&codec->mutex);
1506 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1507 if (codec->ac97 == NULL) {
1508 mutex_unlock(&codec->mutex);
1512 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1513 if (codec->ac97->bus == NULL) {
1516 mutex_unlock(&codec->mutex);
1520 codec->ac97->bus->ops = ops;
1521 codec->ac97->num = num;
1522 codec->dev = &codec->ac97->dev;
1523 mutex_unlock(&codec->mutex);
1526 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1529 * snd_soc_free_ac97_codec - free AC97 codec device
1530 * @codec: audio codec
1532 * Frees AC97 codec device resources.
1534 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1536 mutex_lock(&codec->mutex);
1537 kfree(codec->ac97->bus);
1540 mutex_unlock(&codec->mutex);
1542 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1545 * snd_soc_update_bits - update codec register bits
1546 * @codec: audio codec
1547 * @reg: codec register
1548 * @mask: register mask
1551 * Writes new register value.
1553 * Returns 1 for change else 0.
1555 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1556 unsigned int mask, unsigned int value)
1559 unsigned int old, new;
1561 old = snd_soc_read(codec, reg);
1562 new = (old & ~mask) | value;
1563 change = old != new;
1565 snd_soc_write(codec, reg, new);
1569 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1572 * snd_soc_update_bits_locked - update codec register bits
1573 * @codec: audio codec
1574 * @reg: codec register
1575 * @mask: register mask
1578 * Writes new register value, and takes the codec mutex.
1580 * Returns 1 for change else 0.
1582 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1583 unsigned short reg, unsigned int mask,
1588 mutex_lock(&codec->mutex);
1589 change = snd_soc_update_bits(codec, reg, mask, value);
1590 mutex_unlock(&codec->mutex);
1594 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1597 * snd_soc_test_bits - test register for change
1598 * @codec: audio codec
1599 * @reg: codec register
1600 * @mask: register mask
1603 * Tests a register with a new value and checks if the new value is
1604 * different from the old value.
1606 * Returns 1 for change else 0.
1608 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1609 unsigned int mask, unsigned int value)
1612 unsigned int old, new;
1614 old = snd_soc_read(codec, reg);
1615 new = (old & ~mask) | value;
1616 change = old != new;
1620 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1623 * snd_soc_new_pcms - create new sound card and pcms
1624 * @socdev: the SoC audio device
1625 * @idx: ALSA card index
1626 * @xid: card identification
1628 * Create a new sound card based upon the codec and interface pcms.
1630 * Returns 0 for success, else error.
1632 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1634 struct snd_soc_card *card = socdev->card;
1635 struct snd_soc_codec *codec = card->codec;
1638 mutex_lock(&codec->mutex);
1640 /* register a sound card */
1641 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1643 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1645 mutex_unlock(&codec->mutex);
1649 codec->socdev = socdev;
1650 codec->card->dev = socdev->dev;
1651 codec->card->private_data = codec;
1652 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1654 /* create the pcms */
1655 for (i = 0; i < card->num_links; i++) {
1656 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1658 printk(KERN_ERR "asoc: can't create pcm %s\n",
1659 card->dai_link[i].stream_name);
1660 mutex_unlock(&codec->mutex);
1663 /* Check for codec->ac97 to handle the ac97.c fun */
1664 if (card->dai_link[i].codec_dai->ac97_control && codec->ac97) {
1665 snd_ac97_dev_add_pdata(codec->ac97,
1666 card->dai_link[i].cpu_dai->ac97_pdata);
1670 mutex_unlock(&codec->mutex);
1673 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1676 * snd_soc_free_pcms - free sound card and pcms
1677 * @socdev: the SoC audio device
1679 * Frees sound card and pcms associated with the socdev.
1680 * Also unregister the codec if it is an AC97 device.
1682 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1684 struct snd_soc_codec *codec = socdev->card->codec;
1685 #ifdef CONFIG_SND_SOC_AC97_BUS
1686 struct snd_soc_dai *codec_dai;
1690 mutex_lock(&codec->mutex);
1691 soc_cleanup_codec_debugfs(codec);
1692 #ifdef CONFIG_SND_SOC_AC97_BUS
1693 for (i = 0; i < codec->num_dai; i++) {
1694 codec_dai = &codec->dai[i];
1695 if (codec_dai->ac97_control && codec->ac97 &&
1696 strcmp(codec->name, "AC97") != 0) {
1697 soc_ac97_dev_unregister(codec);
1705 snd_card_free(codec->card);
1706 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1707 mutex_unlock(&codec->mutex);
1709 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1712 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1713 * @substream: the pcm substream
1714 * @hw: the hardware parameters
1716 * Sets the substream runtime hardware parameters.
1718 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1719 const struct snd_pcm_hardware *hw)
1721 struct snd_pcm_runtime *runtime = substream->runtime;
1722 runtime->hw.info = hw->info;
1723 runtime->hw.formats = hw->formats;
1724 runtime->hw.period_bytes_min = hw->period_bytes_min;
1725 runtime->hw.period_bytes_max = hw->period_bytes_max;
1726 runtime->hw.periods_min = hw->periods_min;
1727 runtime->hw.periods_max = hw->periods_max;
1728 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1729 runtime->hw.fifo_size = hw->fifo_size;
1732 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1735 * snd_soc_cnew - create new control
1736 * @_template: control template
1737 * @data: control private data
1738 * @long_name: control long name
1740 * Create a new mixer control from a template control.
1742 * Returns 0 for success, else error.
1744 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1745 void *data, char *long_name)
1747 struct snd_kcontrol_new template;
1749 memcpy(&template, _template, sizeof(template));
1751 template.name = long_name;
1754 return snd_ctl_new1(&template, data);
1756 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1759 * snd_soc_add_controls - add an array of controls to a codec.
1760 * Convienience function to add a list of controls. Many codecs were
1761 * duplicating this code.
1763 * @codec: codec to add controls to
1764 * @controls: array of controls to add
1765 * @num_controls: number of elements in the array
1767 * Return 0 for success, else error.
1769 int snd_soc_add_controls(struct snd_soc_codec *codec,
1770 const struct snd_kcontrol_new *controls, int num_controls)
1772 struct snd_card *card = codec->card;
1775 for (i = 0; i < num_controls; i++) {
1776 const struct snd_kcontrol_new *control = &controls[i];
1777 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1779 dev_err(codec->dev, "%s: Failed to add %s\n",
1780 codec->name, control->name);
1787 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1790 * snd_soc_info_enum_double - enumerated double mixer info callback
1791 * @kcontrol: mixer control
1792 * @uinfo: control element information
1794 * Callback to provide information about a double enumerated
1797 * Returns 0 for success.
1799 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1800 struct snd_ctl_elem_info *uinfo)
1802 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1804 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1805 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1806 uinfo->value.enumerated.items = e->max;
1808 if (uinfo->value.enumerated.item > e->max - 1)
1809 uinfo->value.enumerated.item = e->max - 1;
1810 strcpy(uinfo->value.enumerated.name,
1811 e->texts[uinfo->value.enumerated.item]);
1814 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1817 * snd_soc_get_enum_double - enumerated double mixer get callback
1818 * @kcontrol: mixer control
1819 * @ucontrol: control element information
1821 * Callback to get the value of a double enumerated mixer.
1823 * Returns 0 for success.
1825 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1826 struct snd_ctl_elem_value *ucontrol)
1828 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1829 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1830 unsigned int val, bitmask;
1832 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1834 val = snd_soc_read(codec, e->reg);
1835 ucontrol->value.enumerated.item[0]
1836 = (val >> e->shift_l) & (bitmask - 1);
1837 if (e->shift_l != e->shift_r)
1838 ucontrol->value.enumerated.item[1] =
1839 (val >> e->shift_r) & (bitmask - 1);
1843 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1846 * snd_soc_put_enum_double - enumerated double mixer put callback
1847 * @kcontrol: mixer control
1848 * @ucontrol: control element information
1850 * Callback to set the value of a double enumerated mixer.
1852 * Returns 0 for success.
1854 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1855 struct snd_ctl_elem_value *ucontrol)
1857 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1858 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1860 unsigned int mask, bitmask;
1862 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1864 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1866 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1867 mask = (bitmask - 1) << e->shift_l;
1868 if (e->shift_l != e->shift_r) {
1869 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1871 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1872 mask |= (bitmask - 1) << e->shift_r;
1875 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1877 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1880 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1881 * @kcontrol: mixer control
1882 * @ucontrol: control element information
1884 * Callback to get the value of a double semi enumerated mixer.
1886 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1887 * used for handling bitfield coded enumeration for example.
1889 * Returns 0 for success.
1891 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1892 struct snd_ctl_elem_value *ucontrol)
1894 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1895 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1896 unsigned int reg_val, val, mux;
1898 reg_val = snd_soc_read(codec, e->reg);
1899 val = (reg_val >> e->shift_l) & e->mask;
1900 for (mux = 0; mux < e->max; mux++) {
1901 if (val == e->values[mux])
1904 ucontrol->value.enumerated.item[0] = mux;
1905 if (e->shift_l != e->shift_r) {
1906 val = (reg_val >> e->shift_r) & e->mask;
1907 for (mux = 0; mux < e->max; mux++) {
1908 if (val == e->values[mux])
1911 ucontrol->value.enumerated.item[1] = mux;
1916 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1919 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1920 * @kcontrol: mixer control
1921 * @ucontrol: control element information
1923 * Callback to set the value of a double semi enumerated mixer.
1925 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1926 * used for handling bitfield coded enumeration for example.
1928 * Returns 0 for success.
1930 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1931 struct snd_ctl_elem_value *ucontrol)
1933 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1934 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1938 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1940 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1941 mask = e->mask << e->shift_l;
1942 if (e->shift_l != e->shift_r) {
1943 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1945 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1946 mask |= e->mask << e->shift_r;
1949 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1951 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1954 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1955 * @kcontrol: mixer control
1956 * @uinfo: control element information
1958 * Callback to provide information about an external enumerated
1961 * Returns 0 for success.
1963 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1964 struct snd_ctl_elem_info *uinfo)
1966 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1968 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1970 uinfo->value.enumerated.items = e->max;
1972 if (uinfo->value.enumerated.item > e->max - 1)
1973 uinfo->value.enumerated.item = e->max - 1;
1974 strcpy(uinfo->value.enumerated.name,
1975 e->texts[uinfo->value.enumerated.item]);
1978 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1981 * snd_soc_info_volsw_ext - external single mixer info callback
1982 * @kcontrol: mixer control
1983 * @uinfo: control element information
1985 * Callback to provide information about a single external mixer control.
1987 * Returns 0 for success.
1989 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1990 struct snd_ctl_elem_info *uinfo)
1992 int max = kcontrol->private_value;
1994 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1995 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1997 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2000 uinfo->value.integer.min = 0;
2001 uinfo->value.integer.max = max;
2004 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2007 * snd_soc_info_volsw - single mixer info callback
2008 * @kcontrol: mixer control
2009 * @uinfo: control element information
2011 * Callback to provide information about a single mixer control.
2013 * Returns 0 for success.
2015 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2016 struct snd_ctl_elem_info *uinfo)
2018 struct soc_mixer_control *mc =
2019 (struct soc_mixer_control *)kcontrol->private_value;
2021 unsigned int shift = mc->shift;
2022 unsigned int rshift = mc->rshift;
2024 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2025 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2027 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2029 uinfo->count = shift == rshift ? 1 : 2;
2030 uinfo->value.integer.min = 0;
2031 uinfo->value.integer.max = max;
2034 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2037 * snd_soc_get_volsw - single mixer get callback
2038 * @kcontrol: mixer control
2039 * @ucontrol: control element information
2041 * Callback to get the value of a single mixer control.
2043 * Returns 0 for success.
2045 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2046 struct snd_ctl_elem_value *ucontrol)
2048 struct soc_mixer_control *mc =
2049 (struct soc_mixer_control *)kcontrol->private_value;
2050 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2051 unsigned int reg = mc->reg;
2052 unsigned int shift = mc->shift;
2053 unsigned int rshift = mc->rshift;
2055 unsigned int mask = (1 << fls(max)) - 1;
2056 unsigned int invert = mc->invert;
2058 ucontrol->value.integer.value[0] =
2059 (snd_soc_read(codec, reg) >> shift) & mask;
2060 if (shift != rshift)
2061 ucontrol->value.integer.value[1] =
2062 (snd_soc_read(codec, reg) >> rshift) & mask;
2064 ucontrol->value.integer.value[0] =
2065 max - ucontrol->value.integer.value[0];
2066 if (shift != rshift)
2067 ucontrol->value.integer.value[1] =
2068 max - ucontrol->value.integer.value[1];
2073 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2076 * snd_soc_put_volsw - single mixer put callback
2077 * @kcontrol: mixer control
2078 * @ucontrol: control element information
2080 * Callback to set the value of a single mixer control.
2082 * Returns 0 for success.
2084 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2085 struct snd_ctl_elem_value *ucontrol)
2087 struct soc_mixer_control *mc =
2088 (struct soc_mixer_control *)kcontrol->private_value;
2089 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2090 unsigned int reg = mc->reg;
2091 unsigned int shift = mc->shift;
2092 unsigned int rshift = mc->rshift;
2094 unsigned int mask = (1 << fls(max)) - 1;
2095 unsigned int invert = mc->invert;
2096 unsigned int val, val2, val_mask;
2098 val = (ucontrol->value.integer.value[0] & mask);
2101 val_mask = mask << shift;
2103 if (shift != rshift) {
2104 val2 = (ucontrol->value.integer.value[1] & mask);
2107 val_mask |= mask << rshift;
2108 val |= val2 << rshift;
2110 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2112 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2115 * snd_soc_info_volsw_2r - double mixer info callback
2116 * @kcontrol: mixer control
2117 * @uinfo: control element information
2119 * Callback to provide information about a double mixer control that
2120 * spans 2 codec registers.
2122 * Returns 0 for success.
2124 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2125 struct snd_ctl_elem_info *uinfo)
2127 struct soc_mixer_control *mc =
2128 (struct soc_mixer_control *)kcontrol->private_value;
2131 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2132 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2134 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2137 uinfo->value.integer.min = 0;
2138 uinfo->value.integer.max = max;
2141 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2144 * snd_soc_get_volsw_2r - double mixer get callback
2145 * @kcontrol: mixer control
2146 * @ucontrol: control element information
2148 * Callback to get the value of a double mixer control that spans 2 registers.
2150 * Returns 0 for success.
2152 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2153 struct snd_ctl_elem_value *ucontrol)
2155 struct soc_mixer_control *mc =
2156 (struct soc_mixer_control *)kcontrol->private_value;
2157 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2158 unsigned int reg = mc->reg;
2159 unsigned int reg2 = mc->rreg;
2160 unsigned int shift = mc->shift;
2162 unsigned int mask = (1 << fls(max)) - 1;
2163 unsigned int invert = mc->invert;
2165 ucontrol->value.integer.value[0] =
2166 (snd_soc_read(codec, reg) >> shift) & mask;
2167 ucontrol->value.integer.value[1] =
2168 (snd_soc_read(codec, reg2) >> shift) & mask;
2170 ucontrol->value.integer.value[0] =
2171 max - ucontrol->value.integer.value[0];
2172 ucontrol->value.integer.value[1] =
2173 max - ucontrol->value.integer.value[1];
2178 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2181 * snd_soc_put_volsw_2r - double mixer set callback
2182 * @kcontrol: mixer control
2183 * @ucontrol: control element information
2185 * Callback to set the value of a double mixer control that spans 2 registers.
2187 * Returns 0 for success.
2189 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2190 struct snd_ctl_elem_value *ucontrol)
2192 struct soc_mixer_control *mc =
2193 (struct soc_mixer_control *)kcontrol->private_value;
2194 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2195 unsigned int reg = mc->reg;
2196 unsigned int reg2 = mc->rreg;
2197 unsigned int shift = mc->shift;
2199 unsigned int mask = (1 << fls(max)) - 1;
2200 unsigned int invert = mc->invert;
2202 unsigned int val, val2, val_mask;
2204 val_mask = mask << shift;
2205 val = (ucontrol->value.integer.value[0] & mask);
2206 val2 = (ucontrol->value.integer.value[1] & mask);
2214 val2 = val2 << shift;
2216 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2220 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2223 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2226 * snd_soc_info_volsw_s8 - signed mixer info callback
2227 * @kcontrol: mixer control
2228 * @uinfo: control element information
2230 * Callback to provide information about a signed mixer control.
2232 * Returns 0 for success.
2234 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2235 struct snd_ctl_elem_info *uinfo)
2237 struct soc_mixer_control *mc =
2238 (struct soc_mixer_control *)kcontrol->private_value;
2242 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2244 uinfo->value.integer.min = 0;
2245 uinfo->value.integer.max = max-min;
2248 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2251 * snd_soc_get_volsw_s8 - signed mixer get callback
2252 * @kcontrol: mixer control
2253 * @ucontrol: control element information
2255 * Callback to get the value of a signed mixer control.
2257 * Returns 0 for success.
2259 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2260 struct snd_ctl_elem_value *ucontrol)
2262 struct soc_mixer_control *mc =
2263 (struct soc_mixer_control *)kcontrol->private_value;
2264 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2265 unsigned int reg = mc->reg;
2267 int val = snd_soc_read(codec, reg);
2269 ucontrol->value.integer.value[0] =
2270 ((signed char)(val & 0xff))-min;
2271 ucontrol->value.integer.value[1] =
2272 ((signed char)((val >> 8) & 0xff))-min;
2275 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2278 * snd_soc_put_volsw_sgn - signed mixer put callback
2279 * @kcontrol: mixer control
2280 * @ucontrol: control element information
2282 * Callback to set the value of a signed mixer control.
2284 * Returns 0 for success.
2286 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2287 struct snd_ctl_elem_value *ucontrol)
2289 struct soc_mixer_control *mc =
2290 (struct soc_mixer_control *)kcontrol->private_value;
2291 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2292 unsigned int reg = mc->reg;
2296 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2297 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2299 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2301 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2304 * snd_soc_limit_volume - Set new limit to an existing volume control.
2306 * @codec: where to look for the control
2307 * @name: Name of the control
2308 * @max: new maximum limit
2310 * Return 0 for success, else error.
2312 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2313 const char *name, int max)
2315 struct snd_card *card = codec->card;
2316 struct snd_kcontrol *kctl;
2317 struct soc_mixer_control *mc;
2321 /* Sanity check for name and max */
2322 if (unlikely(!name || max <= 0))
2325 list_for_each_entry(kctl, &card->controls, list) {
2326 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2332 mc = (struct soc_mixer_control *)kctl->private_value;
2333 if (max <= mc->max) {
2340 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2343 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2345 * @clk_id: DAI specific clock ID
2346 * @freq: new clock frequency in Hz
2347 * @dir: new clock direction - input/output.
2349 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2351 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2352 unsigned int freq, int dir)
2354 if (dai->ops && dai->ops->set_sysclk)
2355 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2359 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2362 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2364 * @div_id: DAI specific clock divider ID
2365 * @div: new clock divisor.
2367 * Configures the clock dividers. This is used to derive the best DAI bit and
2368 * frame clocks from the system or master clock. It's best to set the DAI bit
2369 * and frame clocks as low as possible to save system power.
2371 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2372 int div_id, int div)
2374 if (dai->ops && dai->ops->set_clkdiv)
2375 return dai->ops->set_clkdiv(dai, div_id, div);
2379 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2382 * snd_soc_dai_set_pll - configure DAI PLL.
2384 * @pll_id: DAI specific PLL ID
2385 * @source: DAI specific source for the PLL
2386 * @freq_in: PLL input clock frequency in Hz
2387 * @freq_out: requested PLL output clock frequency in Hz
2389 * Configures and enables PLL to generate output clock based on input clock.
2391 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2392 unsigned int freq_in, unsigned int freq_out)
2394 if (dai->ops && dai->ops->set_pll)
2395 return dai->ops->set_pll(dai, pll_id, source,
2400 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2403 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2405 * @fmt: SND_SOC_DAIFMT_ format value.
2407 * Configures the DAI hardware format and clocking.
2409 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2411 if (dai->ops && dai->ops->set_fmt)
2412 return dai->ops->set_fmt(dai, fmt);
2416 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2419 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2421 * @tx_mask: bitmask representing active TX slots.
2422 * @rx_mask: bitmask representing active RX slots.
2423 * @slots: Number of slots in use.
2424 * @slot_width: Width in bits for each slot.
2426 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2429 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2430 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2432 if (dai->ops && dai->ops->set_tdm_slot)
2433 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2438 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2441 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2443 * @tx_num: how many TX channels
2444 * @tx_slot: pointer to an array which imply the TX slot number channel
2446 * @rx_num: how many RX channels
2447 * @rx_slot: pointer to an array which imply the RX slot number channel
2450 * configure the relationship between channel number and TDM slot number.
2452 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2453 unsigned int tx_num, unsigned int *tx_slot,
2454 unsigned int rx_num, unsigned int *rx_slot)
2456 if (dai->ops && dai->ops->set_channel_map)
2457 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2462 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2465 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2467 * @tristate: tristate enable
2469 * Tristates the DAI so that others can use it.
2471 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2473 if (dai->ops && dai->ops->set_tristate)
2474 return dai->ops->set_tristate(dai, tristate);
2478 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2481 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2483 * @mute: mute enable
2485 * Mutes the DAI DAC.
2487 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2489 if (dai->ops && dai->ops->digital_mute)
2490 return dai->ops->digital_mute(dai, mute);
2494 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2497 * snd_soc_register_card - Register a card with the ASoC core
2499 * @card: Card to register
2501 * Note that currently this is an internal only function: it will be
2502 * exposed to machine drivers after further backporting of ASoC v2
2503 * registration APIs.
2505 static int snd_soc_register_card(struct snd_soc_card *card)
2507 if (!card->name || !card->dev)
2510 INIT_LIST_HEAD(&card->list);
2511 card->instantiated = 0;
2513 mutex_lock(&client_mutex);
2514 list_add(&card->list, &card_list);
2515 snd_soc_instantiate_cards();
2516 mutex_unlock(&client_mutex);
2518 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2524 * snd_soc_unregister_card - Unregister a card with the ASoC core
2526 * @card: Card to unregister
2528 * Note that currently this is an internal only function: it will be
2529 * exposed to machine drivers after further backporting of ASoC v2
2530 * registration APIs.
2532 static int snd_soc_unregister_card(struct snd_soc_card *card)
2534 mutex_lock(&client_mutex);
2535 list_del(&card->list);
2536 mutex_unlock(&client_mutex);
2538 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2544 * snd_soc_register_dai - Register a DAI with the ASoC core
2546 * @dai: DAI to register
2548 int snd_soc_register_dai(struct snd_soc_dai *dai)
2553 /* The device should become mandatory over time */
2555 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2558 dai->ops = &null_dai_ops;
2560 INIT_LIST_HEAD(&dai->list);
2562 mutex_lock(&client_mutex);
2563 list_add(&dai->list, &dai_list);
2564 snd_soc_instantiate_cards();
2565 mutex_unlock(&client_mutex);
2567 pr_debug("Registered DAI '%s'\n", dai->name);
2571 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2574 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2576 * @dai: DAI to unregister
2578 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2580 mutex_lock(&client_mutex);
2581 list_del(&dai->list);
2582 mutex_unlock(&client_mutex);
2584 pr_debug("Unregistered DAI '%s'\n", dai->name);
2586 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2589 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2591 * @dai: Array of DAIs to register
2592 * @count: Number of DAIs
2594 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2598 for (i = 0; i < count; i++) {
2599 ret = snd_soc_register_dai(&dai[i]);
2607 for (i--; i >= 0; i--)
2608 snd_soc_unregister_dai(&dai[i]);
2612 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2615 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2617 * @dai: Array of DAIs to unregister
2618 * @count: Number of DAIs
2620 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2624 for (i = 0; i < count; i++)
2625 snd_soc_unregister_dai(&dai[i]);
2627 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2630 * snd_soc_register_platform - Register a platform with the ASoC core
2632 * @platform: platform to register
2634 int snd_soc_register_platform(struct snd_soc_platform *platform)
2636 if (!platform->name)
2639 INIT_LIST_HEAD(&platform->list);
2641 mutex_lock(&client_mutex);
2642 list_add(&platform->list, &platform_list);
2643 snd_soc_instantiate_cards();
2644 mutex_unlock(&client_mutex);
2646 pr_debug("Registered platform '%s'\n", platform->name);
2650 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2653 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2655 * @platform: platform to unregister
2657 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2659 mutex_lock(&client_mutex);
2660 list_del(&platform->list);
2661 mutex_unlock(&client_mutex);
2663 pr_debug("Unregistered platform '%s'\n", platform->name);
2665 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2667 static u64 codec_format_map[] = {
2668 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2669 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2670 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2671 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2672 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2673 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2674 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2675 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2676 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2677 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2678 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2679 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2680 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2681 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2682 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2683 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2686 /* Fix up the DAI formats for endianness: codecs don't actually see
2687 * the endianness of the data but we're using the CPU format
2688 * definitions which do need to include endianness so we ensure that
2689 * codec DAIs always have both big and little endian variants set.
2691 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2695 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2696 if (stream->formats & codec_format_map[i])
2697 stream->formats |= codec_format_map[i];
2701 * snd_soc_register_codec - Register a codec with the ASoC core
2703 * @codec: codec to register
2705 int snd_soc_register_codec(struct snd_soc_codec *codec)
2712 /* The device should become mandatory over time */
2714 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2716 INIT_LIST_HEAD(&codec->list);
2718 for (i = 0; i < codec->num_dai; i++) {
2719 fixup_codec_formats(&codec->dai[i].playback);
2720 fixup_codec_formats(&codec->dai[i].capture);
2723 mutex_lock(&client_mutex);
2724 list_add(&codec->list, &codec_list);
2725 snd_soc_instantiate_cards();
2726 mutex_unlock(&client_mutex);
2728 pr_debug("Registered codec '%s'\n", codec->name);
2732 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2735 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2737 * @codec: codec to unregister
2739 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2741 mutex_lock(&client_mutex);
2742 list_del(&codec->list);
2743 mutex_unlock(&client_mutex);
2745 pr_debug("Unregistered codec '%s'\n", codec->name);
2747 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2749 static int __init snd_soc_init(void)
2751 #ifdef CONFIG_DEBUG_FS
2752 debugfs_root = debugfs_create_dir("asoc", NULL);
2753 if (IS_ERR(debugfs_root) || !debugfs_root) {
2755 "ASoC: Failed to create debugfs directory\n");
2756 debugfs_root = NULL;
2760 return platform_driver_register(&soc_driver);
2763 static void __exit snd_soc_exit(void)
2765 #ifdef CONFIG_DEBUG_FS
2766 debugfs_remove_recursive(debugfs_root);
2768 platform_driver_unregister(&soc_driver);
2771 module_init(snd_soc_init);
2772 module_exit(snd_soc_exit);
2774 /* Module information */
2775 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2776 MODULE_DESCRIPTION("ALSA SoC Core");
2777 MODULE_LICENSE("GPL");
2778 MODULE_ALIAS("platform:soc-audio");