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;
408 runtime->hw.rate_min =
409 max(codec_dai->capture.rate_min,
410 cpu_dai->capture.rate_min);
411 runtime->hw.rate_max =
412 min(codec_dai->capture.rate_max,
413 cpu_dai->capture.rate_max);
414 runtime->hw.channels_min =
415 max(codec_dai->capture.channels_min,
416 cpu_dai->capture.channels_min);
417 runtime->hw.channels_max =
418 min(codec_dai->capture.channels_max,
419 cpu_dai->capture.channels_max);
420 runtime->hw.formats =
421 codec_dai->capture.formats & cpu_dai->capture.formats;
423 codec_dai->capture.rates & cpu_dai->capture.rates;
426 snd_pcm_limit_hw_rates(runtime);
427 if (!runtime->hw.rates) {
428 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
429 codec_dai->name, cpu_dai->name);
432 if (!runtime->hw.formats) {
433 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
434 codec_dai->name, cpu_dai->name);
437 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
438 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
439 codec_dai->name, cpu_dai->name);
443 /* Symmetry only applies if we've already got an active stream. */
444 if (cpu_dai->active || codec_dai->active) {
445 ret = soc_pcm_apply_symmetry(substream);
450 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
451 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
452 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
453 runtime->hw.channels_max);
454 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
455 runtime->hw.rate_max);
457 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
458 cpu_dai->playback.active++;
459 codec_dai->playback.active++;
461 cpu_dai->capture.active++;
462 codec_dai->capture.active++;
466 card->codec->active++;
467 mutex_unlock(&pcm_mutex);
471 if (machine->ops && machine->ops->shutdown)
472 machine->ops->shutdown(substream);
475 if (platform->pcm_ops->close)
476 platform->pcm_ops->close(substream);
479 if (cpu_dai->ops->shutdown)
480 cpu_dai->ops->shutdown(substream, cpu_dai);
482 mutex_unlock(&pcm_mutex);
487 * Power down the audio subsystem pmdown_time msecs after close is called.
488 * This is to ensure there are no pops or clicks in between any music tracks
489 * due to DAPM power cycling.
491 static void close_delayed_work(struct work_struct *work)
493 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
495 struct snd_soc_codec *codec = card->codec;
496 struct snd_soc_dai *codec_dai;
499 mutex_lock(&pcm_mutex);
500 for (i = 0; i < codec->num_dai; i++) {
501 codec_dai = &codec->dai[i];
503 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
504 codec_dai->playback.stream_name,
505 codec_dai->playback.active ? "active" : "inactive",
506 codec_dai->pop_wait ? "yes" : "no");
508 /* are we waiting on this codec DAI stream */
509 if (codec_dai->pop_wait == 1) {
510 codec_dai->pop_wait = 0;
511 snd_soc_dapm_stream_event(codec,
512 codec_dai->playback.stream_name,
513 SND_SOC_DAPM_STREAM_STOP);
516 mutex_unlock(&pcm_mutex);
520 * Called by ALSA when a PCM substream is closed. Private data can be
521 * freed here. The cpu DAI, codec DAI, machine and platform are also
524 static int soc_codec_close(struct snd_pcm_substream *substream)
526 struct snd_soc_pcm_runtime *rtd = substream->private_data;
527 struct snd_soc_device *socdev = rtd->socdev;
528 struct snd_soc_card *card = socdev->card;
529 struct snd_soc_dai_link *machine = rtd->dai;
530 struct snd_soc_platform *platform = card->platform;
531 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
532 struct snd_soc_dai *codec_dai = machine->codec_dai;
533 struct snd_soc_codec *codec = card->codec;
535 mutex_lock(&pcm_mutex);
537 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
538 cpu_dai->playback.active--;
539 codec_dai->playback.active--;
541 cpu_dai->capture.active--;
542 codec_dai->capture.active--;
549 /* Muting the DAC suppresses artifacts caused during digital
550 * shutdown, for example from stopping clocks.
552 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
553 snd_soc_dai_digital_mute(codec_dai, 1);
555 if (cpu_dai->ops->shutdown)
556 cpu_dai->ops->shutdown(substream, cpu_dai);
558 if (codec_dai->ops->shutdown)
559 codec_dai->ops->shutdown(substream, codec_dai);
561 if (machine->ops && machine->ops->shutdown)
562 machine->ops->shutdown(substream);
564 if (platform->pcm_ops->close)
565 platform->pcm_ops->close(substream);
567 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
568 /* start delayed pop wq here for playback streams */
569 codec_dai->pop_wait = 1;
570 schedule_delayed_work(&card->delayed_work,
571 msecs_to_jiffies(card->pmdown_time));
573 /* capture streams can be powered down now */
574 snd_soc_dapm_stream_event(codec,
575 codec_dai->capture.stream_name,
576 SND_SOC_DAPM_STREAM_STOP);
579 mutex_unlock(&pcm_mutex);
584 * Called by ALSA when the PCM substream is prepared, can set format, sample
585 * rate, etc. This function is non atomic and can be called multiple times,
586 * it can refer to the runtime info.
588 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
590 struct snd_soc_pcm_runtime *rtd = substream->private_data;
591 struct snd_soc_device *socdev = rtd->socdev;
592 struct snd_soc_card *card = socdev->card;
593 struct snd_soc_dai_link *machine = rtd->dai;
594 struct snd_soc_platform *platform = card->platform;
595 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
596 struct snd_soc_dai *codec_dai = machine->codec_dai;
597 struct snd_soc_codec *codec = card->codec;
600 mutex_lock(&pcm_mutex);
602 if (machine->ops && machine->ops->prepare) {
603 ret = machine->ops->prepare(substream);
605 printk(KERN_ERR "asoc: machine prepare error\n");
610 if (platform->pcm_ops->prepare) {
611 ret = platform->pcm_ops->prepare(substream);
613 printk(KERN_ERR "asoc: platform prepare error\n");
618 if (codec_dai->ops->prepare) {
619 ret = codec_dai->ops->prepare(substream, codec_dai);
621 printk(KERN_ERR "asoc: codec DAI prepare error\n");
626 if (cpu_dai->ops->prepare) {
627 ret = cpu_dai->ops->prepare(substream, cpu_dai);
629 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
634 /* cancel any delayed stream shutdown that is pending */
635 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
636 codec_dai->pop_wait) {
637 codec_dai->pop_wait = 0;
638 cancel_delayed_work(&card->delayed_work);
641 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
642 snd_soc_dapm_stream_event(codec,
643 codec_dai->playback.stream_name,
644 SND_SOC_DAPM_STREAM_START);
646 snd_soc_dapm_stream_event(codec,
647 codec_dai->capture.stream_name,
648 SND_SOC_DAPM_STREAM_START);
650 snd_soc_dai_digital_mute(codec_dai, 0);
653 mutex_unlock(&pcm_mutex);
658 * Called by ALSA when the hardware params are set by application. This
659 * function can also be called multiple times and can allocate buffers
660 * (using snd_pcm_lib_* ). It's non-atomic.
662 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
663 struct snd_pcm_hw_params *params)
665 struct snd_soc_pcm_runtime *rtd = substream->private_data;
666 struct snd_soc_device *socdev = rtd->socdev;
667 struct snd_soc_dai_link *machine = rtd->dai;
668 struct snd_soc_card *card = socdev->card;
669 struct snd_soc_platform *platform = card->platform;
670 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
671 struct snd_soc_dai *codec_dai = machine->codec_dai;
674 mutex_lock(&pcm_mutex);
676 if (machine->ops && machine->ops->hw_params) {
677 ret = machine->ops->hw_params(substream, params);
679 printk(KERN_ERR "asoc: machine hw_params failed\n");
684 if (codec_dai->ops->hw_params) {
685 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
687 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
693 if (cpu_dai->ops->hw_params) {
694 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
696 printk(KERN_ERR "asoc: interface %s hw params failed\n",
702 if (platform->pcm_ops->hw_params) {
703 ret = platform->pcm_ops->hw_params(substream, params);
705 printk(KERN_ERR "asoc: platform %s hw params failed\n",
711 machine->rate = params_rate(params);
714 mutex_unlock(&pcm_mutex);
718 if (cpu_dai->ops->hw_free)
719 cpu_dai->ops->hw_free(substream, cpu_dai);
722 if (codec_dai->ops->hw_free)
723 codec_dai->ops->hw_free(substream, codec_dai);
726 if (machine->ops && machine->ops->hw_free)
727 machine->ops->hw_free(substream);
729 mutex_unlock(&pcm_mutex);
734 * Free's resources allocated by hw_params, can be called multiple times
736 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
738 struct snd_soc_pcm_runtime *rtd = substream->private_data;
739 struct snd_soc_device *socdev = rtd->socdev;
740 struct snd_soc_dai_link *machine = rtd->dai;
741 struct snd_soc_card *card = socdev->card;
742 struct snd_soc_platform *platform = card->platform;
743 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
744 struct snd_soc_dai *codec_dai = machine->codec_dai;
745 struct snd_soc_codec *codec = card->codec;
747 mutex_lock(&pcm_mutex);
749 /* apply codec digital mute */
751 snd_soc_dai_digital_mute(codec_dai, 1);
753 /* free any machine hw params */
754 if (machine->ops && machine->ops->hw_free)
755 machine->ops->hw_free(substream);
757 /* free any DMA resources */
758 if (platform->pcm_ops->hw_free)
759 platform->pcm_ops->hw_free(substream);
761 /* now free hw params for the DAI's */
762 if (codec_dai->ops->hw_free)
763 codec_dai->ops->hw_free(substream, codec_dai);
765 if (cpu_dai->ops->hw_free)
766 cpu_dai->ops->hw_free(substream, cpu_dai);
768 mutex_unlock(&pcm_mutex);
772 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
774 struct snd_soc_pcm_runtime *rtd = substream->private_data;
775 struct snd_soc_device *socdev = rtd->socdev;
776 struct snd_soc_card *card= socdev->card;
777 struct snd_soc_dai_link *machine = rtd->dai;
778 struct snd_soc_platform *platform = card->platform;
779 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
780 struct snd_soc_dai *codec_dai = machine->codec_dai;
783 if (codec_dai->ops->trigger) {
784 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
789 if (platform->pcm_ops->trigger) {
790 ret = platform->pcm_ops->trigger(substream, cmd);
795 if (cpu_dai->ops->trigger) {
796 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
804 * soc level wrapper for pointer callback
805 * If cpu_dai, codec_dai, platform driver has the delay callback, than
806 * the runtime->delay will be updated accordingly.
808 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
810 struct snd_soc_pcm_runtime *rtd = substream->private_data;
811 struct snd_soc_device *socdev = rtd->socdev;
812 struct snd_soc_card *card = socdev->card;
813 struct snd_soc_platform *platform = card->platform;
814 struct snd_soc_dai_link *machine = rtd->dai;
815 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
816 struct snd_soc_dai *codec_dai = machine->codec_dai;
817 struct snd_pcm_runtime *runtime = substream->runtime;
818 snd_pcm_uframes_t offset = 0;
819 snd_pcm_sframes_t delay = 0;
821 if (platform->pcm_ops->pointer)
822 offset = platform->pcm_ops->pointer(substream);
824 if (cpu_dai->ops->delay)
825 delay += cpu_dai->ops->delay(substream, cpu_dai);
827 if (codec_dai->ops->delay)
828 delay += codec_dai->ops->delay(substream, codec_dai);
831 delay += platform->delay(substream, codec_dai);
833 runtime->delay = delay;
838 /* ASoC PCM operations */
839 static struct snd_pcm_ops soc_pcm_ops = {
840 .open = soc_pcm_open,
841 .close = soc_codec_close,
842 .hw_params = soc_pcm_hw_params,
843 .hw_free = soc_pcm_hw_free,
844 .prepare = soc_pcm_prepare,
845 .trigger = soc_pcm_trigger,
846 .pointer = soc_pcm_pointer,
850 /* powers down audio subsystem for suspend */
851 static int soc_suspend(struct device *dev)
853 struct platform_device *pdev = to_platform_device(dev);
854 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
855 struct snd_soc_card *card = socdev->card;
856 struct snd_soc_platform *platform = card->platform;
857 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
858 struct snd_soc_codec *codec = card->codec;
861 /* If the initialization of this soc device failed, there is no codec
862 * associated with it. Just bail out in this case.
867 /* Due to the resume being scheduled into a workqueue we could
868 * suspend before that's finished - wait for it to complete.
870 snd_power_lock(codec->card);
871 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
872 snd_power_unlock(codec->card);
874 /* we're going to block userspace touching us until resume completes */
875 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
877 /* mute any active DAC's */
878 for (i = 0; i < card->num_links; i++) {
879 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
880 if (dai->ops->digital_mute && dai->playback.active)
881 dai->ops->digital_mute(dai, 1);
884 /* suspend all pcms */
885 for (i = 0; i < card->num_links; i++)
886 snd_pcm_suspend_all(card->dai_link[i].pcm);
888 if (card->suspend_pre)
889 card->suspend_pre(pdev, PMSG_SUSPEND);
891 for (i = 0; i < card->num_links; i++) {
892 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
893 if (cpu_dai->suspend && !cpu_dai->ac97_control)
894 cpu_dai->suspend(cpu_dai);
895 if (platform->suspend)
896 platform->suspend(&card->dai_link[i]);
899 /* close any waiting streams and save state */
900 run_delayed_work(&card->delayed_work);
901 codec->suspend_bias_level = codec->bias_level;
903 for (i = 0; i < codec->num_dai; i++) {
904 char *stream = codec->dai[i].playback.stream_name;
906 snd_soc_dapm_stream_event(codec, stream,
907 SND_SOC_DAPM_STREAM_SUSPEND);
908 stream = codec->dai[i].capture.stream_name;
910 snd_soc_dapm_stream_event(codec, stream,
911 SND_SOC_DAPM_STREAM_SUSPEND);
914 if (codec_dev->suspend)
915 codec_dev->suspend(pdev, PMSG_SUSPEND);
917 for (i = 0; i < card->num_links; i++) {
918 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
919 if (cpu_dai->suspend && cpu_dai->ac97_control)
920 cpu_dai->suspend(cpu_dai);
923 if (card->suspend_post)
924 card->suspend_post(pdev, PMSG_SUSPEND);
929 /* deferred resume work, so resume can complete before we finished
930 * setting our codec back up, which can be very slow on I2C
932 static void soc_resume_deferred(struct work_struct *work)
934 struct snd_soc_card *card = container_of(work,
936 deferred_resume_work);
937 struct snd_soc_device *socdev = card->socdev;
938 struct snd_soc_platform *platform = card->platform;
939 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
940 struct snd_soc_codec *codec = card->codec;
941 struct platform_device *pdev = to_platform_device(socdev->dev);
944 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
945 * so userspace apps are blocked from touching us
948 dev_dbg(socdev->dev, "starting resume work\n");
950 if (card->resume_pre)
951 card->resume_pre(pdev);
953 for (i = 0; i < card->num_links; i++) {
954 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
955 if (cpu_dai->resume && cpu_dai->ac97_control)
956 cpu_dai->resume(cpu_dai);
959 if (codec_dev->resume)
960 codec_dev->resume(pdev);
962 for (i = 0; i < codec->num_dai; i++) {
963 char *stream = codec->dai[i].playback.stream_name;
965 snd_soc_dapm_stream_event(codec, stream,
966 SND_SOC_DAPM_STREAM_RESUME);
967 stream = codec->dai[i].capture.stream_name;
969 snd_soc_dapm_stream_event(codec, stream,
970 SND_SOC_DAPM_STREAM_RESUME);
973 /* unmute any active DACs */
974 for (i = 0; i < card->num_links; i++) {
975 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
976 if (dai->ops->digital_mute && dai->playback.active)
977 dai->ops->digital_mute(dai, 0);
980 for (i = 0; i < card->num_links; i++) {
981 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
982 if (cpu_dai->resume && !cpu_dai->ac97_control)
983 cpu_dai->resume(cpu_dai);
984 if (platform->resume)
985 platform->resume(&card->dai_link[i]);
988 if (card->resume_post)
989 card->resume_post(pdev);
991 dev_dbg(socdev->dev, "resume work completed\n");
993 /* userspace can access us now we are back as we were before */
994 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
997 /* powers up audio subsystem after a suspend */
998 static int soc_resume(struct device *dev)
1000 struct platform_device *pdev = to_platform_device(dev);
1001 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1002 struct snd_soc_card *card = socdev->card;
1003 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
1005 /* AC97 devices might have other drivers hanging off them so
1006 * need to resume immediately. Other drivers don't have that
1007 * problem and may take a substantial amount of time to resume
1008 * due to I/O costs and anti-pop so handle them out of line.
1010 if (cpu_dai->ac97_control) {
1011 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
1012 soc_resume_deferred(&card->deferred_resume_work);
1014 dev_dbg(socdev->dev, "Scheduling resume work\n");
1015 if (!schedule_work(&card->deferred_resume_work))
1016 dev_err(socdev->dev, "resume work item may be lost\n");
1022 #define soc_suspend NULL
1023 #define soc_resume NULL
1026 static struct snd_soc_dai_ops null_dai_ops = {
1029 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1031 struct platform_device *pdev = container_of(card->dev,
1032 struct platform_device,
1034 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
1035 struct snd_soc_codec *codec;
1036 struct snd_soc_platform *platform;
1037 struct snd_soc_dai *dai;
1038 int i, found, ret, ac97;
1040 if (card->instantiated)
1044 list_for_each_entry(platform, &platform_list, list)
1045 if (card->platform == platform) {
1050 dev_dbg(card->dev, "Platform %s not registered\n",
1051 card->platform->name);
1056 for (i = 0; i < card->num_links; i++) {
1058 list_for_each_entry(dai, &dai_list, list)
1059 if (card->dai_link[i].cpu_dai == dai) {
1064 dev_dbg(card->dev, "DAI %s not registered\n",
1065 card->dai_link[i].cpu_dai->name);
1069 if (card->dai_link[i].cpu_dai->ac97_control)
1073 for (i = 0; i < card->num_links; i++) {
1074 if (!card->dai_link[i].codec_dai->ops)
1075 card->dai_link[i].codec_dai->ops = &null_dai_ops;
1078 /* If we have AC97 in the system then don't wait for the
1079 * codec. This will need revisiting if we have to handle
1080 * systems with mixed AC97 and non-AC97 parts. Only check for
1081 * DAIs currently; we can't do this per link since some AC97
1082 * codecs have non-AC97 DAIs.
1085 for (i = 0; i < card->num_links; i++) {
1087 list_for_each_entry(dai, &dai_list, list)
1088 if (card->dai_link[i].codec_dai == dai) {
1093 dev_dbg(card->dev, "DAI %s not registered\n",
1094 card->dai_link[i].codec_dai->name);
1099 /* Note that we do not current check for codec components */
1101 dev_dbg(card->dev, "All components present, instantiating\n");
1103 /* Found everything, bring it up */
1104 card->pmdown_time = pmdown_time;
1107 ret = card->probe(pdev);
1112 for (i = 0; i < card->num_links; i++) {
1113 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1114 if (cpu_dai->probe) {
1115 ret = cpu_dai->probe(pdev, cpu_dai);
1121 if (codec_dev->probe) {
1122 ret = codec_dev->probe(pdev);
1126 codec = card->codec;
1128 if (platform->probe) {
1129 ret = platform->probe(pdev);
1134 /* DAPM stream work */
1135 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
1137 /* deferred resume work */
1138 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1141 for (i = 0; i < card->num_links; i++) {
1142 if (card->dai_link[i].init) {
1143 ret = card->dai_link[i].init(codec);
1145 printk(KERN_ERR "asoc: failed to init %s\n",
1146 card->dai_link[i].stream_name);
1150 if (card->dai_link[i].codec_dai->ac97_control)
1154 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1156 snprintf(codec->card->longname, sizeof(codec->card->longname),
1157 "%s (%s)", card->name, codec->name);
1159 /* Make sure all DAPM widgets are instantiated */
1160 snd_soc_dapm_new_widgets(codec);
1162 ret = snd_card_register(codec->card);
1164 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1169 mutex_lock(&codec->mutex);
1170 #ifdef CONFIG_SND_SOC_AC97_BUS
1171 /* Only instantiate AC97 if not already done by the adaptor
1172 * for the generic AC97 subsystem.
1174 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1175 ret = soc_ac97_dev_register(codec);
1177 printk(KERN_ERR "asoc: AC97 device register failed\n");
1178 snd_card_free(codec->card);
1179 mutex_unlock(&codec->mutex);
1185 ret = snd_soc_dapm_sys_add(card->socdev->dev);
1187 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1189 ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
1191 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1193 ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
1195 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1197 soc_init_codec_debugfs(codec);
1198 mutex_unlock(&codec->mutex);
1200 card->instantiated = 1;
1205 if (platform->remove)
1206 platform->remove(pdev);
1209 if (codec_dev->remove)
1210 codec_dev->remove(pdev);
1213 for (i--; i >= 0; i--) {
1214 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1215 if (cpu_dai->remove)
1216 cpu_dai->remove(pdev, cpu_dai);
1224 * Attempt to initialise any uninitalised cards. Must be called with
1227 static void snd_soc_instantiate_cards(void)
1229 struct snd_soc_card *card;
1230 list_for_each_entry(card, &card_list, list)
1231 snd_soc_instantiate_card(card);
1234 /* probes a new socdev */
1235 static int soc_probe(struct platform_device *pdev)
1238 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1239 struct snd_soc_card *card = socdev->card;
1241 /* Bodge while we push things out of socdev */
1242 card->socdev = socdev;
1244 /* Bodge while we unpick instantiation */
1245 card->dev = &pdev->dev;
1246 ret = snd_soc_register_card(card);
1248 dev_err(&pdev->dev, "Failed to register card\n");
1255 /* removes a socdev */
1256 static int soc_remove(struct platform_device *pdev)
1259 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1260 struct snd_soc_card *card = socdev->card;
1261 struct snd_soc_platform *platform = card->platform;
1262 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1264 if (!card->instantiated)
1267 run_delayed_work(&card->delayed_work);
1269 if (platform->remove)
1270 platform->remove(pdev);
1272 if (codec_dev->remove)
1273 codec_dev->remove(pdev);
1275 for (i = 0; i < card->num_links; i++) {
1276 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1277 if (cpu_dai->remove)
1278 cpu_dai->remove(pdev, cpu_dai);
1284 snd_soc_unregister_card(card);
1289 static int soc_poweroff(struct device *dev)
1291 struct platform_device *pdev = to_platform_device(dev);
1292 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1293 struct snd_soc_card *card = socdev->card;
1295 if (!card->instantiated)
1298 /* Flush out pmdown_time work - we actually do want to run it
1299 * now, we're shutting down so no imminent restart. */
1300 run_delayed_work(&card->delayed_work);
1302 snd_soc_dapm_shutdown(socdev);
1307 static const struct dev_pm_ops soc_pm_ops = {
1308 .suspend = soc_suspend,
1309 .resume = soc_resume,
1310 .poweroff = soc_poweroff,
1313 /* ASoC platform driver */
1314 static struct platform_driver soc_driver = {
1316 .name = "soc-audio",
1317 .owner = THIS_MODULE,
1321 .remove = soc_remove,
1324 /* create a new pcm */
1325 static int soc_new_pcm(struct snd_soc_device *socdev,
1326 struct snd_soc_dai_link *dai_link, int num)
1328 struct snd_soc_card *card = socdev->card;
1329 struct snd_soc_codec *codec = card->codec;
1330 struct snd_soc_platform *platform = card->platform;
1331 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1332 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1333 struct snd_soc_pcm_runtime *rtd;
1334 struct snd_pcm *pcm;
1336 int ret = 0, playback = 0, capture = 0;
1338 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1342 rtd->dai = dai_link;
1343 rtd->socdev = socdev;
1344 codec_dai->codec = card->codec;
1346 /* check client and interface hw capabilities */
1347 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1348 dai_link->stream_name, codec_dai->name, num);
1350 if (codec_dai->playback.channels_min)
1352 if (codec_dai->capture.channels_min)
1355 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1358 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1364 dai_link->pcm = pcm;
1365 pcm->private_data = rtd;
1366 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1367 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1368 soc_pcm_ops.copy = platform->pcm_ops->copy;
1369 soc_pcm_ops.silence = platform->pcm_ops->silence;
1370 soc_pcm_ops.ack = platform->pcm_ops->ack;
1371 soc_pcm_ops.page = platform->pcm_ops->page;
1374 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1377 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1379 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1381 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1386 pcm->private_free = platform->pcm_free;
1387 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1393 * snd_soc_codec_volatile_register: Report if a register is volatile.
1395 * @codec: CODEC to query.
1396 * @reg: Register to query.
1398 * Boolean function indiciating if a CODEC register is volatile.
1400 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1402 if (codec->volatile_register)
1403 return codec->volatile_register(reg);
1407 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1410 * snd_soc_new_ac97_codec - initailise AC97 device
1411 * @codec: audio codec
1412 * @ops: AC97 bus operations
1413 * @num: AC97 codec number
1415 * Initialises AC97 codec resources for use by ad-hoc devices only.
1417 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1418 struct snd_ac97_bus_ops *ops, int num)
1420 mutex_lock(&codec->mutex);
1422 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1423 if (codec->ac97 == NULL) {
1424 mutex_unlock(&codec->mutex);
1428 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1429 if (codec->ac97->bus == NULL) {
1432 mutex_unlock(&codec->mutex);
1436 codec->ac97->bus->ops = ops;
1437 codec->ac97->num = num;
1438 codec->dev = &codec->ac97->dev;
1439 mutex_unlock(&codec->mutex);
1442 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1445 * snd_soc_free_ac97_codec - free AC97 codec device
1446 * @codec: audio codec
1448 * Frees AC97 codec device resources.
1450 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1452 mutex_lock(&codec->mutex);
1453 kfree(codec->ac97->bus);
1456 mutex_unlock(&codec->mutex);
1458 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1461 * snd_soc_update_bits - update codec register bits
1462 * @codec: audio codec
1463 * @reg: codec register
1464 * @mask: register mask
1467 * Writes new register value.
1469 * Returns 1 for change else 0.
1471 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1472 unsigned int mask, unsigned int value)
1475 unsigned int old, new;
1477 old = snd_soc_read(codec, reg);
1478 new = (old & ~mask) | value;
1479 change = old != new;
1481 snd_soc_write(codec, reg, new);
1485 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1488 * snd_soc_update_bits_locked - update codec register bits
1489 * @codec: audio codec
1490 * @reg: codec register
1491 * @mask: register mask
1494 * Writes new register value, and takes the codec mutex.
1496 * Returns 1 for change else 0.
1498 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1499 unsigned short reg, unsigned int mask,
1504 mutex_lock(&codec->mutex);
1505 change = snd_soc_update_bits(codec, reg, mask, value);
1506 mutex_unlock(&codec->mutex);
1510 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1513 * snd_soc_test_bits - test register for change
1514 * @codec: audio codec
1515 * @reg: codec register
1516 * @mask: register mask
1519 * Tests a register with a new value and checks if the new value is
1520 * different from the old value.
1522 * Returns 1 for change else 0.
1524 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1525 unsigned int mask, unsigned int value)
1528 unsigned int old, new;
1530 old = snd_soc_read(codec, reg);
1531 new = (old & ~mask) | value;
1532 change = old != new;
1536 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1539 * snd_soc_new_pcms - create new sound card and pcms
1540 * @socdev: the SoC audio device
1541 * @idx: ALSA card index
1542 * @xid: card identification
1544 * Create a new sound card based upon the codec and interface pcms.
1546 * Returns 0 for success, else error.
1548 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1550 struct snd_soc_card *card = socdev->card;
1551 struct snd_soc_codec *codec = card->codec;
1554 mutex_lock(&codec->mutex);
1556 /* register a sound card */
1557 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1559 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1561 mutex_unlock(&codec->mutex);
1565 codec->socdev = socdev;
1566 codec->card->dev = socdev->dev;
1567 codec->card->private_data = codec;
1568 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1570 /* create the pcms */
1571 for (i = 0; i < card->num_links; i++) {
1572 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1574 printk(KERN_ERR "asoc: can't create pcm %s\n",
1575 card->dai_link[i].stream_name);
1576 mutex_unlock(&codec->mutex);
1579 if (card->dai_link[i].codec_dai->ac97_control) {
1580 snd_ac97_dev_add_pdata(codec->ac97,
1581 card->dai_link[i].cpu_dai->ac97_pdata);
1585 mutex_unlock(&codec->mutex);
1588 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1591 * snd_soc_free_pcms - free sound card and pcms
1592 * @socdev: the SoC audio device
1594 * Frees sound card and pcms associated with the socdev.
1595 * Also unregister the codec if it is an AC97 device.
1597 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1599 struct snd_soc_codec *codec = socdev->card->codec;
1600 #ifdef CONFIG_SND_SOC_AC97_BUS
1601 struct snd_soc_dai *codec_dai;
1605 mutex_lock(&codec->mutex);
1606 soc_cleanup_codec_debugfs(codec);
1607 #ifdef CONFIG_SND_SOC_AC97_BUS
1608 for (i = 0; i < codec->num_dai; i++) {
1609 codec_dai = &codec->dai[i];
1610 if (codec_dai->ac97_control && codec->ac97 &&
1611 strcmp(codec->name, "AC97") != 0) {
1612 soc_ac97_dev_unregister(codec);
1620 snd_card_free(codec->card);
1621 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1622 mutex_unlock(&codec->mutex);
1624 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1627 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1628 * @substream: the pcm substream
1629 * @hw: the hardware parameters
1631 * Sets the substream runtime hardware parameters.
1633 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1634 const struct snd_pcm_hardware *hw)
1636 struct snd_pcm_runtime *runtime = substream->runtime;
1637 runtime->hw.info = hw->info;
1638 runtime->hw.formats = hw->formats;
1639 runtime->hw.period_bytes_min = hw->period_bytes_min;
1640 runtime->hw.period_bytes_max = hw->period_bytes_max;
1641 runtime->hw.periods_min = hw->periods_min;
1642 runtime->hw.periods_max = hw->periods_max;
1643 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1644 runtime->hw.fifo_size = hw->fifo_size;
1647 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1650 * snd_soc_cnew - create new control
1651 * @_template: control template
1652 * @data: control private data
1653 * @long_name: control long name
1655 * Create a new mixer control from a template control.
1657 * Returns 0 for success, else error.
1659 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1660 void *data, char *long_name)
1662 struct snd_kcontrol_new template;
1664 memcpy(&template, _template, sizeof(template));
1666 template.name = long_name;
1669 return snd_ctl_new1(&template, data);
1671 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1674 * snd_soc_add_controls - add an array of controls to a codec.
1675 * Convienience function to add a list of controls. Many codecs were
1676 * duplicating this code.
1678 * @codec: codec to add controls to
1679 * @controls: array of controls to add
1680 * @num_controls: number of elements in the array
1682 * Return 0 for success, else error.
1684 int snd_soc_add_controls(struct snd_soc_codec *codec,
1685 const struct snd_kcontrol_new *controls, int num_controls)
1687 struct snd_card *card = codec->card;
1690 for (i = 0; i < num_controls; i++) {
1691 const struct snd_kcontrol_new *control = &controls[i];
1692 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1694 dev_err(codec->dev, "%s: Failed to add %s\n",
1695 codec->name, control->name);
1702 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1705 * snd_soc_info_enum_double - enumerated double mixer info callback
1706 * @kcontrol: mixer control
1707 * @uinfo: control element information
1709 * Callback to provide information about a double enumerated
1712 * Returns 0 for success.
1714 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1715 struct snd_ctl_elem_info *uinfo)
1717 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1719 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1720 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1721 uinfo->value.enumerated.items = e->max;
1723 if (uinfo->value.enumerated.item > e->max - 1)
1724 uinfo->value.enumerated.item = e->max - 1;
1725 strcpy(uinfo->value.enumerated.name,
1726 e->texts[uinfo->value.enumerated.item]);
1729 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1732 * snd_soc_get_enum_double - enumerated double mixer get callback
1733 * @kcontrol: mixer control
1734 * @ucontrol: control element information
1736 * Callback to get the value of a double enumerated mixer.
1738 * Returns 0 for success.
1740 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1741 struct snd_ctl_elem_value *ucontrol)
1743 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1744 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1745 unsigned int val, bitmask;
1747 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1749 val = snd_soc_read(codec, e->reg);
1750 ucontrol->value.enumerated.item[0]
1751 = (val >> e->shift_l) & (bitmask - 1);
1752 if (e->shift_l != e->shift_r)
1753 ucontrol->value.enumerated.item[1] =
1754 (val >> e->shift_r) & (bitmask - 1);
1758 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1761 * snd_soc_put_enum_double - enumerated double mixer put callback
1762 * @kcontrol: mixer control
1763 * @ucontrol: control element information
1765 * Callback to set the value of a double enumerated mixer.
1767 * Returns 0 for success.
1769 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1770 struct snd_ctl_elem_value *ucontrol)
1772 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1773 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1775 unsigned int mask, bitmask;
1777 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1779 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1781 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1782 mask = (bitmask - 1) << e->shift_l;
1783 if (e->shift_l != e->shift_r) {
1784 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1786 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1787 mask |= (bitmask - 1) << e->shift_r;
1790 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1792 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1795 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1796 * @kcontrol: mixer control
1797 * @ucontrol: control element information
1799 * Callback to get the value of a double semi enumerated mixer.
1801 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1802 * used for handling bitfield coded enumeration for example.
1804 * Returns 0 for success.
1806 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1807 struct snd_ctl_elem_value *ucontrol)
1809 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1810 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1811 unsigned int reg_val, val, mux;
1813 reg_val = snd_soc_read(codec, e->reg);
1814 val = (reg_val >> e->shift_l) & e->mask;
1815 for (mux = 0; mux < e->max; mux++) {
1816 if (val == e->values[mux])
1819 ucontrol->value.enumerated.item[0] = mux;
1820 if (e->shift_l != e->shift_r) {
1821 val = (reg_val >> e->shift_r) & e->mask;
1822 for (mux = 0; mux < e->max; mux++) {
1823 if (val == e->values[mux])
1826 ucontrol->value.enumerated.item[1] = mux;
1831 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1834 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1835 * @kcontrol: mixer control
1836 * @ucontrol: control element information
1838 * Callback to set the value of a double semi enumerated mixer.
1840 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1841 * used for handling bitfield coded enumeration for example.
1843 * Returns 0 for success.
1845 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1846 struct snd_ctl_elem_value *ucontrol)
1848 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1849 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1853 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1855 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1856 mask = e->mask << e->shift_l;
1857 if (e->shift_l != e->shift_r) {
1858 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1860 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1861 mask |= e->mask << e->shift_r;
1864 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1866 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1869 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1870 * @kcontrol: mixer control
1871 * @uinfo: control element information
1873 * Callback to provide information about an external enumerated
1876 * Returns 0 for success.
1878 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1879 struct snd_ctl_elem_info *uinfo)
1881 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1883 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1885 uinfo->value.enumerated.items = e->max;
1887 if (uinfo->value.enumerated.item > e->max - 1)
1888 uinfo->value.enumerated.item = e->max - 1;
1889 strcpy(uinfo->value.enumerated.name,
1890 e->texts[uinfo->value.enumerated.item]);
1893 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1896 * snd_soc_info_volsw_ext - external single mixer info callback
1897 * @kcontrol: mixer control
1898 * @uinfo: control element information
1900 * Callback to provide information about a single external mixer control.
1902 * Returns 0 for success.
1904 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1905 struct snd_ctl_elem_info *uinfo)
1907 int max = kcontrol->private_value;
1909 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1910 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1912 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1915 uinfo->value.integer.min = 0;
1916 uinfo->value.integer.max = max;
1919 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1922 * snd_soc_info_volsw - single mixer info callback
1923 * @kcontrol: mixer control
1924 * @uinfo: control element information
1926 * Callback to provide information about a single mixer control.
1928 * Returns 0 for success.
1930 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1931 struct snd_ctl_elem_info *uinfo)
1933 struct soc_mixer_control *mc =
1934 (struct soc_mixer_control *)kcontrol->private_value;
1936 unsigned int shift = mc->shift;
1937 unsigned int rshift = mc->rshift;
1939 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1940 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1942 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1944 uinfo->count = shift == rshift ? 1 : 2;
1945 uinfo->value.integer.min = 0;
1946 uinfo->value.integer.max = max;
1949 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1952 * snd_soc_get_volsw - single mixer get callback
1953 * @kcontrol: mixer control
1954 * @ucontrol: control element information
1956 * Callback to get the value of a single mixer control.
1958 * Returns 0 for success.
1960 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1961 struct snd_ctl_elem_value *ucontrol)
1963 struct soc_mixer_control *mc =
1964 (struct soc_mixer_control *)kcontrol->private_value;
1965 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1966 unsigned int reg = mc->reg;
1967 unsigned int shift = mc->shift;
1968 unsigned int rshift = mc->rshift;
1970 unsigned int mask = (1 << fls(max)) - 1;
1971 unsigned int invert = mc->invert;
1973 ucontrol->value.integer.value[0] =
1974 (snd_soc_read(codec, reg) >> shift) & mask;
1975 if (shift != rshift)
1976 ucontrol->value.integer.value[1] =
1977 (snd_soc_read(codec, reg) >> rshift) & mask;
1979 ucontrol->value.integer.value[0] =
1980 max - ucontrol->value.integer.value[0];
1981 if (shift != rshift)
1982 ucontrol->value.integer.value[1] =
1983 max - ucontrol->value.integer.value[1];
1988 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1991 * snd_soc_put_volsw - single mixer put callback
1992 * @kcontrol: mixer control
1993 * @ucontrol: control element information
1995 * Callback to set the value of a single mixer control.
1997 * Returns 0 for success.
1999 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2000 struct snd_ctl_elem_value *ucontrol)
2002 struct soc_mixer_control *mc =
2003 (struct soc_mixer_control *)kcontrol->private_value;
2004 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2005 unsigned int reg = mc->reg;
2006 unsigned int shift = mc->shift;
2007 unsigned int rshift = mc->rshift;
2009 unsigned int mask = (1 << fls(max)) - 1;
2010 unsigned int invert = mc->invert;
2011 unsigned int val, val2, val_mask;
2013 val = (ucontrol->value.integer.value[0] & mask);
2016 val_mask = mask << shift;
2018 if (shift != rshift) {
2019 val2 = (ucontrol->value.integer.value[1] & mask);
2022 val_mask |= mask << rshift;
2023 val |= val2 << rshift;
2025 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2027 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2030 * snd_soc_info_volsw_2r - double mixer info callback
2031 * @kcontrol: mixer control
2032 * @uinfo: control element information
2034 * Callback to provide information about a double mixer control that
2035 * spans 2 codec registers.
2037 * Returns 0 for success.
2039 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2040 struct snd_ctl_elem_info *uinfo)
2042 struct soc_mixer_control *mc =
2043 (struct soc_mixer_control *)kcontrol->private_value;
2046 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2047 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2049 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2052 uinfo->value.integer.min = 0;
2053 uinfo->value.integer.max = max;
2056 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2059 * snd_soc_get_volsw_2r - double mixer get callback
2060 * @kcontrol: mixer control
2061 * @ucontrol: control element information
2063 * Callback to get the value of a double mixer control that spans 2 registers.
2065 * Returns 0 for success.
2067 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2068 struct snd_ctl_elem_value *ucontrol)
2070 struct soc_mixer_control *mc =
2071 (struct soc_mixer_control *)kcontrol->private_value;
2072 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2073 unsigned int reg = mc->reg;
2074 unsigned int reg2 = mc->rreg;
2075 unsigned int shift = mc->shift;
2077 unsigned int mask = (1 << fls(max)) - 1;
2078 unsigned int invert = mc->invert;
2080 ucontrol->value.integer.value[0] =
2081 (snd_soc_read(codec, reg) >> shift) & mask;
2082 ucontrol->value.integer.value[1] =
2083 (snd_soc_read(codec, reg2) >> shift) & mask;
2085 ucontrol->value.integer.value[0] =
2086 max - ucontrol->value.integer.value[0];
2087 ucontrol->value.integer.value[1] =
2088 max - ucontrol->value.integer.value[1];
2093 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2096 * snd_soc_put_volsw_2r - double mixer set callback
2097 * @kcontrol: mixer control
2098 * @ucontrol: control element information
2100 * Callback to set the value of a double mixer control that spans 2 registers.
2102 * Returns 0 for success.
2104 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2105 struct snd_ctl_elem_value *ucontrol)
2107 struct soc_mixer_control *mc =
2108 (struct soc_mixer_control *)kcontrol->private_value;
2109 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2110 unsigned int reg = mc->reg;
2111 unsigned int reg2 = mc->rreg;
2112 unsigned int shift = mc->shift;
2114 unsigned int mask = (1 << fls(max)) - 1;
2115 unsigned int invert = mc->invert;
2117 unsigned int val, val2, val_mask;
2119 val_mask = mask << shift;
2120 val = (ucontrol->value.integer.value[0] & mask);
2121 val2 = (ucontrol->value.integer.value[1] & mask);
2129 val2 = val2 << shift;
2131 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2135 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2138 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2141 * snd_soc_info_volsw_s8 - signed mixer info callback
2142 * @kcontrol: mixer control
2143 * @uinfo: control element information
2145 * Callback to provide information about a signed mixer control.
2147 * Returns 0 for success.
2149 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2150 struct snd_ctl_elem_info *uinfo)
2152 struct soc_mixer_control *mc =
2153 (struct soc_mixer_control *)kcontrol->private_value;
2157 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2159 uinfo->value.integer.min = 0;
2160 uinfo->value.integer.max = max-min;
2163 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2166 * snd_soc_get_volsw_s8 - signed mixer get callback
2167 * @kcontrol: mixer control
2168 * @ucontrol: control element information
2170 * Callback to get the value of a signed mixer control.
2172 * Returns 0 for success.
2174 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2175 struct snd_ctl_elem_value *ucontrol)
2177 struct soc_mixer_control *mc =
2178 (struct soc_mixer_control *)kcontrol->private_value;
2179 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2180 unsigned int reg = mc->reg;
2182 int val = snd_soc_read(codec, reg);
2184 ucontrol->value.integer.value[0] =
2185 ((signed char)(val & 0xff))-min;
2186 ucontrol->value.integer.value[1] =
2187 ((signed char)((val >> 8) & 0xff))-min;
2190 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2193 * snd_soc_put_volsw_sgn - signed mixer put callback
2194 * @kcontrol: mixer control
2195 * @ucontrol: control element information
2197 * Callback to set the value of a signed mixer control.
2199 * Returns 0 for success.
2201 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2202 struct snd_ctl_elem_value *ucontrol)
2204 struct soc_mixer_control *mc =
2205 (struct soc_mixer_control *)kcontrol->private_value;
2206 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2207 unsigned int reg = mc->reg;
2211 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2212 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2214 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2216 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2219 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2221 * @clk_id: DAI specific clock ID
2222 * @freq: new clock frequency in Hz
2223 * @dir: new clock direction - input/output.
2225 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2227 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2228 unsigned int freq, int dir)
2230 if (dai->ops && dai->ops->set_sysclk)
2231 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2235 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2238 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2240 * @div_id: DAI specific clock divider ID
2241 * @div: new clock divisor.
2243 * Configures the clock dividers. This is used to derive the best DAI bit and
2244 * frame clocks from the system or master clock. It's best to set the DAI bit
2245 * and frame clocks as low as possible to save system power.
2247 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2248 int div_id, int div)
2250 if (dai->ops && dai->ops->set_clkdiv)
2251 return dai->ops->set_clkdiv(dai, div_id, div);
2255 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2258 * snd_soc_dai_set_pll - configure DAI PLL.
2260 * @pll_id: DAI specific PLL ID
2261 * @source: DAI specific source for the PLL
2262 * @freq_in: PLL input clock frequency in Hz
2263 * @freq_out: requested PLL output clock frequency in Hz
2265 * Configures and enables PLL to generate output clock based on input clock.
2267 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2268 unsigned int freq_in, unsigned int freq_out)
2270 if (dai->ops && dai->ops->set_pll)
2271 return dai->ops->set_pll(dai, pll_id, source,
2276 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2279 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2281 * @fmt: SND_SOC_DAIFMT_ format value.
2283 * Configures the DAI hardware format and clocking.
2285 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2287 if (dai->ops && dai->ops->set_fmt)
2288 return dai->ops->set_fmt(dai, fmt);
2292 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2295 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2297 * @tx_mask: bitmask representing active TX slots.
2298 * @rx_mask: bitmask representing active RX slots.
2299 * @slots: Number of slots in use.
2300 * @slot_width: Width in bits for each slot.
2302 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2305 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2306 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2308 if (dai->ops && dai->ops->set_tdm_slot)
2309 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2314 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2317 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2319 * @tx_num: how many TX channels
2320 * @tx_slot: pointer to an array which imply the TX slot number channel
2322 * @rx_num: how many RX channels
2323 * @rx_slot: pointer to an array which imply the RX slot number channel
2326 * configure the relationship between channel number and TDM slot number.
2328 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2329 unsigned int tx_num, unsigned int *tx_slot,
2330 unsigned int rx_num, unsigned int *rx_slot)
2332 if (dai->ops && dai->ops->set_channel_map)
2333 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2338 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2341 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2343 * @tristate: tristate enable
2345 * Tristates the DAI so that others can use it.
2347 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2349 if (dai->ops && dai->ops->set_tristate)
2350 return dai->ops->set_tristate(dai, tristate);
2354 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2357 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2359 * @mute: mute enable
2361 * Mutes the DAI DAC.
2363 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2365 if (dai->ops && dai->ops->digital_mute)
2366 return dai->ops->digital_mute(dai, mute);
2370 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2373 * snd_soc_register_card - Register a card with the ASoC core
2375 * @card: Card to register
2377 * Note that currently this is an internal only function: it will be
2378 * exposed to machine drivers after further backporting of ASoC v2
2379 * registration APIs.
2381 static int snd_soc_register_card(struct snd_soc_card *card)
2383 if (!card->name || !card->dev)
2386 INIT_LIST_HEAD(&card->list);
2387 card->instantiated = 0;
2389 mutex_lock(&client_mutex);
2390 list_add(&card->list, &card_list);
2391 snd_soc_instantiate_cards();
2392 mutex_unlock(&client_mutex);
2394 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2400 * snd_soc_unregister_card - Unregister a card with the ASoC core
2402 * @card: Card to unregister
2404 * Note that currently this is an internal only function: it will be
2405 * exposed to machine drivers after further backporting of ASoC v2
2406 * registration APIs.
2408 static int snd_soc_unregister_card(struct snd_soc_card *card)
2410 mutex_lock(&client_mutex);
2411 list_del(&card->list);
2412 mutex_unlock(&client_mutex);
2414 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2420 * snd_soc_register_dai - Register a DAI with the ASoC core
2422 * @dai: DAI to register
2424 int snd_soc_register_dai(struct snd_soc_dai *dai)
2429 /* The device should become mandatory over time */
2431 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2434 dai->ops = &null_dai_ops;
2436 INIT_LIST_HEAD(&dai->list);
2438 mutex_lock(&client_mutex);
2439 list_add(&dai->list, &dai_list);
2440 snd_soc_instantiate_cards();
2441 mutex_unlock(&client_mutex);
2443 pr_debug("Registered DAI '%s'\n", dai->name);
2447 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2450 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2452 * @dai: DAI to unregister
2454 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2456 mutex_lock(&client_mutex);
2457 list_del(&dai->list);
2458 mutex_unlock(&client_mutex);
2460 pr_debug("Unregistered DAI '%s'\n", dai->name);
2462 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2465 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2467 * @dai: Array of DAIs to register
2468 * @count: Number of DAIs
2470 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2474 for (i = 0; i < count; i++) {
2475 ret = snd_soc_register_dai(&dai[i]);
2483 for (i--; i >= 0; i--)
2484 snd_soc_unregister_dai(&dai[i]);
2488 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2491 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2493 * @dai: Array of DAIs to unregister
2494 * @count: Number of DAIs
2496 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2500 for (i = 0; i < count; i++)
2501 snd_soc_unregister_dai(&dai[i]);
2503 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2506 * snd_soc_register_platform - Register a platform with the ASoC core
2508 * @platform: platform to register
2510 int snd_soc_register_platform(struct snd_soc_platform *platform)
2512 if (!platform->name)
2515 INIT_LIST_HEAD(&platform->list);
2517 mutex_lock(&client_mutex);
2518 list_add(&platform->list, &platform_list);
2519 snd_soc_instantiate_cards();
2520 mutex_unlock(&client_mutex);
2522 pr_debug("Registered platform '%s'\n", platform->name);
2526 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2529 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2531 * @platform: platform to unregister
2533 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2535 mutex_lock(&client_mutex);
2536 list_del(&platform->list);
2537 mutex_unlock(&client_mutex);
2539 pr_debug("Unregistered platform '%s'\n", platform->name);
2541 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2543 static u64 codec_format_map[] = {
2544 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2545 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2546 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2547 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2548 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2549 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2550 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2551 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2552 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2553 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2554 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2555 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2556 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2557 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2558 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2559 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2562 /* Fix up the DAI formats for endianness: codecs don't actually see
2563 * the endianness of the data but we're using the CPU format
2564 * definitions which do need to include endianness so we ensure that
2565 * codec DAIs always have both big and little endian variants set.
2567 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2571 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2572 if (stream->formats & codec_format_map[i])
2573 stream->formats |= codec_format_map[i];
2577 * snd_soc_register_codec - Register a codec with the ASoC core
2579 * @codec: codec to register
2581 int snd_soc_register_codec(struct snd_soc_codec *codec)
2588 /* The device should become mandatory over time */
2590 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2592 INIT_LIST_HEAD(&codec->list);
2594 for (i = 0; i < codec->num_dai; i++) {
2595 fixup_codec_formats(&codec->dai[i].playback);
2596 fixup_codec_formats(&codec->dai[i].capture);
2599 mutex_lock(&client_mutex);
2600 list_add(&codec->list, &codec_list);
2601 snd_soc_instantiate_cards();
2602 mutex_unlock(&client_mutex);
2604 pr_debug("Registered codec '%s'\n", codec->name);
2608 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2611 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2613 * @codec: codec to unregister
2615 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2617 mutex_lock(&client_mutex);
2618 list_del(&codec->list);
2619 mutex_unlock(&client_mutex);
2621 pr_debug("Unregistered codec '%s'\n", codec->name);
2623 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2625 static int __init snd_soc_init(void)
2627 #ifdef CONFIG_DEBUG_FS
2628 debugfs_root = debugfs_create_dir("asoc", NULL);
2629 if (IS_ERR(debugfs_root) || !debugfs_root) {
2631 "ASoC: Failed to create debugfs directory\n");
2632 debugfs_root = NULL;
2636 return platform_driver_register(&soc_driver);
2639 static void __exit snd_soc_exit(void)
2641 #ifdef CONFIG_DEBUG_FS
2642 debugfs_remove_recursive(debugfs_root);
2644 platform_driver_unregister(&soc_driver);
2647 module_init(snd_soc_init);
2648 module_exit(snd_soc_exit);
2650 /* Module information */
2651 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2652 MODULE_DESCRIPTION("ALSA SoC Core");
2653 MODULE_LICENSE("GPL");
2654 MODULE_ALIAS("platform:soc-audio");