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
= codec_dai
->playback
.active
= 1;
460 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 1;
461 cpu_dai
->active
= codec_dai
->active
= 1;
462 cpu_dai
->runtime
= runtime
;
463 card
->codec
->active
++;
464 mutex_unlock(&pcm_mutex
);
468 if (machine
->ops
&& machine
->ops
->shutdown
)
469 machine
->ops
->shutdown(substream
);
472 if (platform
->pcm_ops
->close
)
473 platform
->pcm_ops
->close(substream
);
476 if (cpu_dai
->ops
->shutdown
)
477 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
479 mutex_unlock(&pcm_mutex
);
484 * Power down the audio subsystem pmdown_time msecs after close is called.
485 * This is to ensure there are no pops or clicks in between any music tracks
486 * due to DAPM power cycling.
488 static void close_delayed_work(struct work_struct
*work
)
490 struct snd_soc_card
*card
= container_of(work
, struct snd_soc_card
,
492 struct snd_soc_codec
*codec
= card
->codec
;
493 struct snd_soc_dai
*codec_dai
;
496 mutex_lock(&pcm_mutex
);
497 for (i
= 0; i
< codec
->num_dai
; i
++) {
498 codec_dai
= &codec
->dai
[i
];
500 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
501 codec_dai
->playback
.stream_name
,
502 codec_dai
->playback
.active
? "active" : "inactive",
503 codec_dai
->pop_wait
? "yes" : "no");
505 /* are we waiting on this codec DAI stream */
506 if (codec_dai
->pop_wait
== 1) {
507 codec_dai
->pop_wait
= 0;
508 snd_soc_dapm_stream_event(codec
,
509 codec_dai
->playback
.stream_name
,
510 SND_SOC_DAPM_STREAM_STOP
);
513 mutex_unlock(&pcm_mutex
);
517 * Called by ALSA when a PCM substream is closed. Private data can be
518 * freed here. The cpu DAI, codec DAI, machine and platform are also
521 static int soc_codec_close(struct snd_pcm_substream
*substream
)
523 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
524 struct snd_soc_device
*socdev
= rtd
->socdev
;
525 struct snd_soc_card
*card
= socdev
->card
;
526 struct snd_soc_dai_link
*machine
= rtd
->dai
;
527 struct snd_soc_platform
*platform
= card
->platform
;
528 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
529 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
530 struct snd_soc_codec
*codec
= card
->codec
;
532 mutex_lock(&pcm_mutex
);
534 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
535 cpu_dai
->playback
.active
= codec_dai
->playback
.active
= 0;
537 cpu_dai
->capture
.active
= codec_dai
->capture
.active
= 0;
539 if (codec_dai
->playback
.active
== 0 &&
540 codec_dai
->capture
.active
== 0) {
541 cpu_dai
->active
= codec_dai
->active
= 0;
545 /* Muting the DAC suppresses artifacts caused during digital
546 * shutdown, for example from stopping clocks.
548 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
549 snd_soc_dai_digital_mute(codec_dai
, 1);
551 if (cpu_dai
->ops
->shutdown
)
552 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
554 if (codec_dai
->ops
->shutdown
)
555 codec_dai
->ops
->shutdown(substream
, codec_dai
);
557 if (machine
->ops
&& machine
->ops
->shutdown
)
558 machine
->ops
->shutdown(substream
);
560 if (platform
->pcm_ops
->close
)
561 platform
->pcm_ops
->close(substream
);
562 cpu_dai
->runtime
= NULL
;
564 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
565 /* start delayed pop wq here for playback streams */
566 codec_dai
->pop_wait
= 1;
567 schedule_delayed_work(&card
->delayed_work
,
568 msecs_to_jiffies(card
->pmdown_time
));
570 /* capture streams can be powered down now */
571 snd_soc_dapm_stream_event(codec
,
572 codec_dai
->capture
.stream_name
,
573 SND_SOC_DAPM_STREAM_STOP
);
576 mutex_unlock(&pcm_mutex
);
581 * Called by ALSA when the PCM substream is prepared, can set format, sample
582 * rate, etc. This function is non atomic and can be called multiple times,
583 * it can refer to the runtime info.
585 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
587 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
588 struct snd_soc_device
*socdev
= rtd
->socdev
;
589 struct snd_soc_card
*card
= socdev
->card
;
590 struct snd_soc_dai_link
*machine
= rtd
->dai
;
591 struct snd_soc_platform
*platform
= card
->platform
;
592 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
593 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
594 struct snd_soc_codec
*codec
= card
->codec
;
597 mutex_lock(&pcm_mutex
);
599 if (machine
->ops
&& machine
->ops
->prepare
) {
600 ret
= machine
->ops
->prepare(substream
);
602 printk(KERN_ERR
"asoc: machine prepare error\n");
607 if (platform
->pcm_ops
->prepare
) {
608 ret
= platform
->pcm_ops
->prepare(substream
);
610 printk(KERN_ERR
"asoc: platform prepare error\n");
615 if (codec_dai
->ops
->prepare
) {
616 ret
= codec_dai
->ops
->prepare(substream
, codec_dai
);
618 printk(KERN_ERR
"asoc: codec DAI prepare error\n");
623 if (cpu_dai
->ops
->prepare
) {
624 ret
= cpu_dai
->ops
->prepare(substream
, cpu_dai
);
626 printk(KERN_ERR
"asoc: cpu DAI prepare error\n");
631 /* cancel any delayed stream shutdown that is pending */
632 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
633 codec_dai
->pop_wait
) {
634 codec_dai
->pop_wait
= 0;
635 cancel_delayed_work(&card
->delayed_work
);
638 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
639 snd_soc_dapm_stream_event(codec
,
640 codec_dai
->playback
.stream_name
,
641 SND_SOC_DAPM_STREAM_START
);
643 snd_soc_dapm_stream_event(codec
,
644 codec_dai
->capture
.stream_name
,
645 SND_SOC_DAPM_STREAM_START
);
647 snd_soc_dai_digital_mute(codec_dai
, 0);
650 mutex_unlock(&pcm_mutex
);
655 * Called by ALSA when the hardware params are set by application. This
656 * function can also be called multiple times and can allocate buffers
657 * (using snd_pcm_lib_* ). It's non-atomic.
659 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
660 struct snd_pcm_hw_params
*params
)
662 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
663 struct snd_soc_device
*socdev
= rtd
->socdev
;
664 struct snd_soc_dai_link
*machine
= rtd
->dai
;
665 struct snd_soc_card
*card
= socdev
->card
;
666 struct snd_soc_platform
*platform
= card
->platform
;
667 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
668 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
671 mutex_lock(&pcm_mutex
);
673 if (machine
->ops
&& machine
->ops
->hw_params
) {
674 ret
= machine
->ops
->hw_params(substream
, params
);
676 printk(KERN_ERR
"asoc: machine hw_params failed\n");
681 if (codec_dai
->ops
->hw_params
) {
682 ret
= codec_dai
->ops
->hw_params(substream
, params
, codec_dai
);
684 printk(KERN_ERR
"asoc: can't set codec %s hw params\n",
690 if (cpu_dai
->ops
->hw_params
) {
691 ret
= cpu_dai
->ops
->hw_params(substream
, params
, cpu_dai
);
693 printk(KERN_ERR
"asoc: interface %s hw params failed\n",
699 if (platform
->pcm_ops
->hw_params
) {
700 ret
= platform
->pcm_ops
->hw_params(substream
, params
);
702 printk(KERN_ERR
"asoc: platform %s hw params failed\n",
708 machine
->rate
= params_rate(params
);
711 mutex_unlock(&pcm_mutex
);
715 if (cpu_dai
->ops
->hw_free
)
716 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
719 if (codec_dai
->ops
->hw_free
)
720 codec_dai
->ops
->hw_free(substream
, codec_dai
);
723 if (machine
->ops
&& machine
->ops
->hw_free
)
724 machine
->ops
->hw_free(substream
);
726 mutex_unlock(&pcm_mutex
);
731 * Free's resources allocated by hw_params, can be called multiple times
733 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
735 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
736 struct snd_soc_device
*socdev
= rtd
->socdev
;
737 struct snd_soc_dai_link
*machine
= rtd
->dai
;
738 struct snd_soc_card
*card
= socdev
->card
;
739 struct snd_soc_platform
*platform
= card
->platform
;
740 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
741 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
742 struct snd_soc_codec
*codec
= card
->codec
;
744 mutex_lock(&pcm_mutex
);
746 /* apply codec digital mute */
748 snd_soc_dai_digital_mute(codec_dai
, 1);
750 /* free any machine hw params */
751 if (machine
->ops
&& machine
->ops
->hw_free
)
752 machine
->ops
->hw_free(substream
);
754 /* free any DMA resources */
755 if (platform
->pcm_ops
->hw_free
)
756 platform
->pcm_ops
->hw_free(substream
);
758 /* now free hw params for the DAI's */
759 if (codec_dai
->ops
->hw_free
)
760 codec_dai
->ops
->hw_free(substream
, codec_dai
);
762 if (cpu_dai
->ops
->hw_free
)
763 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
765 mutex_unlock(&pcm_mutex
);
769 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
771 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
772 struct snd_soc_device
*socdev
= rtd
->socdev
;
773 struct snd_soc_card
*card
= socdev
->card
;
774 struct snd_soc_dai_link
*machine
= rtd
->dai
;
775 struct snd_soc_platform
*platform
= card
->platform
;
776 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
777 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
780 if (codec_dai
->ops
->trigger
) {
781 ret
= codec_dai
->ops
->trigger(substream
, cmd
, codec_dai
);
786 if (platform
->pcm_ops
->trigger
) {
787 ret
= platform
->pcm_ops
->trigger(substream
, cmd
);
792 if (cpu_dai
->ops
->trigger
) {
793 ret
= cpu_dai
->ops
->trigger(substream
, cmd
, cpu_dai
);
800 /* ASoC PCM operations */
801 static struct snd_pcm_ops soc_pcm_ops
= {
802 .open
= soc_pcm_open
,
803 .close
= soc_codec_close
,
804 .hw_params
= soc_pcm_hw_params
,
805 .hw_free
= soc_pcm_hw_free
,
806 .prepare
= soc_pcm_prepare
,
807 .trigger
= soc_pcm_trigger
,
811 /* powers down audio subsystem for suspend */
812 static int soc_suspend(struct device
*dev
)
814 struct platform_device
*pdev
= to_platform_device(dev
);
815 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
816 struct snd_soc_card
*card
= socdev
->card
;
817 struct snd_soc_platform
*platform
= card
->platform
;
818 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
819 struct snd_soc_codec
*codec
= card
->codec
;
822 /* If the initialization of this soc device failed, there is no codec
823 * associated with it. Just bail out in this case.
828 /* Due to the resume being scheduled into a workqueue we could
829 * suspend before that's finished - wait for it to complete.
831 snd_power_lock(codec
->card
);
832 snd_power_wait(codec
->card
, SNDRV_CTL_POWER_D0
);
833 snd_power_unlock(codec
->card
);
835 /* we're going to block userspace touching us until resume completes */
836 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D3hot
);
838 /* mute any active DAC's */
839 for (i
= 0; i
< card
->num_links
; i
++) {
840 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
841 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
842 dai
->ops
->digital_mute(dai
, 1);
845 /* suspend all pcms */
846 for (i
= 0; i
< card
->num_links
; i
++)
847 snd_pcm_suspend_all(card
->dai_link
[i
].pcm
);
849 if (card
->suspend_pre
)
850 card
->suspend_pre(pdev
, PMSG_SUSPEND
);
852 for (i
= 0; i
< card
->num_links
; i
++) {
853 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
854 if (cpu_dai
->suspend
&& !cpu_dai
->ac97_control
)
855 cpu_dai
->suspend(cpu_dai
);
856 if (platform
->suspend
)
857 platform
->suspend(cpu_dai
);
860 /* close any waiting streams and save state */
861 run_delayed_work(&card
->delayed_work
);
862 codec
->suspend_bias_level
= codec
->bias_level
;
864 for (i
= 0; i
< codec
->num_dai
; i
++) {
865 char *stream
= codec
->dai
[i
].playback
.stream_name
;
867 snd_soc_dapm_stream_event(codec
, stream
,
868 SND_SOC_DAPM_STREAM_SUSPEND
);
869 stream
= codec
->dai
[i
].capture
.stream_name
;
871 snd_soc_dapm_stream_event(codec
, stream
,
872 SND_SOC_DAPM_STREAM_SUSPEND
);
875 if (codec_dev
->suspend
)
876 codec_dev
->suspend(pdev
, PMSG_SUSPEND
);
878 for (i
= 0; i
< card
->num_links
; i
++) {
879 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
880 if (cpu_dai
->suspend
&& cpu_dai
->ac97_control
)
881 cpu_dai
->suspend(cpu_dai
);
884 if (card
->suspend_post
)
885 card
->suspend_post(pdev
, PMSG_SUSPEND
);
890 /* deferred resume work, so resume can complete before we finished
891 * setting our codec back up, which can be very slow on I2C
893 static void soc_resume_deferred(struct work_struct
*work
)
895 struct snd_soc_card
*card
= container_of(work
,
897 deferred_resume_work
);
898 struct snd_soc_device
*socdev
= card
->socdev
;
899 struct snd_soc_platform
*platform
= card
->platform
;
900 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
901 struct snd_soc_codec
*codec
= card
->codec
;
902 struct platform_device
*pdev
= to_platform_device(socdev
->dev
);
905 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
906 * so userspace apps are blocked from touching us
909 dev_dbg(socdev
->dev
, "starting resume work\n");
911 if (card
->resume_pre
)
912 card
->resume_pre(pdev
);
914 for (i
= 0; i
< card
->num_links
; i
++) {
915 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
916 if (cpu_dai
->resume
&& cpu_dai
->ac97_control
)
917 cpu_dai
->resume(cpu_dai
);
920 if (codec_dev
->resume
)
921 codec_dev
->resume(pdev
);
923 for (i
= 0; i
< codec
->num_dai
; i
++) {
924 char *stream
= codec
->dai
[i
].playback
.stream_name
;
926 snd_soc_dapm_stream_event(codec
, stream
,
927 SND_SOC_DAPM_STREAM_RESUME
);
928 stream
= codec
->dai
[i
].capture
.stream_name
;
930 snd_soc_dapm_stream_event(codec
, stream
,
931 SND_SOC_DAPM_STREAM_RESUME
);
934 /* unmute any active DACs */
935 for (i
= 0; i
< card
->num_links
; i
++) {
936 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
937 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
938 dai
->ops
->digital_mute(dai
, 0);
941 for (i
= 0; i
< card
->num_links
; i
++) {
942 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
943 if (cpu_dai
->resume
&& !cpu_dai
->ac97_control
)
944 cpu_dai
->resume(cpu_dai
);
945 if (platform
->resume
)
946 platform
->resume(cpu_dai
);
949 if (card
->resume_post
)
950 card
->resume_post(pdev
);
952 dev_dbg(socdev
->dev
, "resume work completed\n");
954 /* userspace can access us now we are back as we were before */
955 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D0
);
958 /* powers up audio subsystem after a suspend */
959 static int soc_resume(struct device
*dev
)
961 struct platform_device
*pdev
= to_platform_device(dev
);
962 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
963 struct snd_soc_card
*card
= socdev
->card
;
964 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[0].cpu_dai
;
966 /* If the initialization of this soc device failed, there is no codec
967 * associated with it. Just bail out in this case.
972 /* AC97 devices might have other drivers hanging off them so
973 * need to resume immediately. Other drivers don't have that
974 * problem and may take a substantial amount of time to resume
975 * due to I/O costs and anti-pop so handle them out of line.
977 if (cpu_dai
->ac97_control
) {
978 dev_dbg(socdev
->dev
, "Resuming AC97 immediately\n");
979 soc_resume_deferred(&card
->deferred_resume_work
);
981 dev_dbg(socdev
->dev
, "Scheduling resume work\n");
982 if (!schedule_work(&card
->deferred_resume_work
))
983 dev_err(socdev
->dev
, "resume work item may be lost\n");
989 #define soc_suspend NULL
990 #define soc_resume NULL
993 static struct snd_soc_dai_ops null_dai_ops
= {
996 static void snd_soc_instantiate_card(struct snd_soc_card
*card
)
998 struct platform_device
*pdev
= container_of(card
->dev
,
999 struct platform_device
,
1001 struct snd_soc_codec_device
*codec_dev
= card
->socdev
->codec_dev
;
1002 struct snd_soc_codec
*codec
;
1003 struct snd_soc_platform
*platform
;
1004 struct snd_soc_dai
*dai
;
1005 int i
, found
, ret
, ac97
;
1007 if (card
->instantiated
)
1011 list_for_each_entry(platform
, &platform_list
, list
)
1012 if (card
->platform
== platform
) {
1017 dev_dbg(card
->dev
, "Platform %s not registered\n",
1018 card
->platform
->name
);
1023 for (i
= 0; i
< card
->num_links
; i
++) {
1025 list_for_each_entry(dai
, &dai_list
, list
)
1026 if (card
->dai_link
[i
].cpu_dai
== dai
) {
1031 dev_dbg(card
->dev
, "DAI %s not registered\n",
1032 card
->dai_link
[i
].cpu_dai
->name
);
1036 if (card
->dai_link
[i
].cpu_dai
->ac97_control
)
1040 for (i
= 0; i
< card
->num_links
; i
++) {
1041 if (!card
->dai_link
[i
].codec_dai
->ops
)
1042 card
->dai_link
[i
].codec_dai
->ops
= &null_dai_ops
;
1045 /* If we have AC97 in the system then don't wait for the
1046 * codec. This will need revisiting if we have to handle
1047 * systems with mixed AC97 and non-AC97 parts. Only check for
1048 * DAIs currently; we can't do this per link since some AC97
1049 * codecs have non-AC97 DAIs.
1052 for (i
= 0; i
< card
->num_links
; i
++) {
1054 list_for_each_entry(dai
, &dai_list
, list
)
1055 if (card
->dai_link
[i
].codec_dai
== dai
) {
1060 dev_dbg(card
->dev
, "DAI %s not registered\n",
1061 card
->dai_link
[i
].codec_dai
->name
);
1066 /* Note that we do not current check for codec components */
1068 dev_dbg(card
->dev
, "All components present, instantiating\n");
1070 /* Found everything, bring it up */
1071 card
->pmdown_time
= pmdown_time
;
1074 ret
= card
->probe(pdev
);
1079 for (i
= 0; i
< card
->num_links
; i
++) {
1080 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1081 if (cpu_dai
->probe
) {
1082 ret
= cpu_dai
->probe(pdev
, cpu_dai
);
1088 if (codec_dev
->probe
) {
1089 ret
= codec_dev
->probe(pdev
);
1093 codec
= card
->codec
;
1095 if (platform
->probe
) {
1096 ret
= platform
->probe(pdev
);
1101 /* DAPM stream work */
1102 INIT_DELAYED_WORK(&card
->delayed_work
, close_delayed_work
);
1104 /* deferred resume work */
1105 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
1108 for (i
= 0; i
< card
->num_links
; i
++) {
1109 if (card
->dai_link
[i
].init
) {
1110 ret
= card
->dai_link
[i
].init(codec
);
1112 printk(KERN_ERR
"asoc: failed to init %s\n",
1113 card
->dai_link
[i
].stream_name
);
1117 if (card
->dai_link
[i
].codec_dai
->ac97_control
)
1121 snprintf(codec
->card
->shortname
, sizeof(codec
->card
->shortname
),
1123 snprintf(codec
->card
->longname
, sizeof(codec
->card
->longname
),
1124 "%s (%s)", card
->name
, codec
->name
);
1126 /* Make sure all DAPM widgets are instantiated */
1127 snd_soc_dapm_new_widgets(codec
);
1129 ret
= snd_card_register(codec
->card
);
1131 printk(KERN_ERR
"asoc: failed to register soundcard for %s\n",
1136 mutex_lock(&codec
->mutex
);
1137 #ifdef CONFIG_SND_SOC_AC97_BUS
1138 /* Only instantiate AC97 if not already done by the adaptor
1139 * for the generic AC97 subsystem.
1141 if (ac97
&& strcmp(codec
->name
, "AC97") != 0) {
1142 ret
= soc_ac97_dev_register(codec
);
1144 printk(KERN_ERR
"asoc: AC97 device register failed\n");
1145 snd_card_free(codec
->card
);
1146 mutex_unlock(&codec
->mutex
);
1152 ret
= snd_soc_dapm_sys_add(card
->socdev
->dev
);
1154 printk(KERN_WARNING
"asoc: failed to add dapm sysfs entries\n");
1156 ret
= device_create_file(card
->socdev
->dev
, &dev_attr_pmdown_time
);
1158 printk(KERN_WARNING
"asoc: failed to add pmdown_time sysfs\n");
1160 ret
= device_create_file(card
->socdev
->dev
, &dev_attr_codec_reg
);
1162 printk(KERN_WARNING
"asoc: failed to add codec sysfs files\n");
1164 soc_init_codec_debugfs(codec
);
1165 mutex_unlock(&codec
->mutex
);
1167 card
->instantiated
= 1;
1172 if (platform
->remove
)
1173 platform
->remove(pdev
);
1176 if (codec_dev
->remove
)
1177 codec_dev
->remove(pdev
);
1180 for (i
--; i
>= 0; i
--) {
1181 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1182 if (cpu_dai
->remove
)
1183 cpu_dai
->remove(pdev
, cpu_dai
);
1191 * Attempt to initialise any uninitalised cards. Must be called with
1194 static void snd_soc_instantiate_cards(void)
1196 struct snd_soc_card
*card
;
1197 list_for_each_entry(card
, &card_list
, list
)
1198 snd_soc_instantiate_card(card
);
1201 /* probes a new socdev */
1202 static int soc_probe(struct platform_device
*pdev
)
1205 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1206 struct snd_soc_card
*card
= socdev
->card
;
1208 /* Bodge while we push things out of socdev */
1209 card
->socdev
= socdev
;
1211 /* Bodge while we unpick instantiation */
1212 card
->dev
= &pdev
->dev
;
1213 ret
= snd_soc_register_card(card
);
1215 dev_err(&pdev
->dev
, "Failed to register card\n");
1222 /* removes a socdev */
1223 static int soc_remove(struct platform_device
*pdev
)
1226 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1227 struct snd_soc_card
*card
= socdev
->card
;
1228 struct snd_soc_platform
*platform
= card
->platform
;
1229 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
1231 if (!card
->instantiated
)
1234 run_delayed_work(&card
->delayed_work
);
1236 if (platform
->remove
)
1237 platform
->remove(pdev
);
1239 if (codec_dev
->remove
)
1240 codec_dev
->remove(pdev
);
1242 for (i
= 0; i
< card
->num_links
; i
++) {
1243 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1244 if (cpu_dai
->remove
)
1245 cpu_dai
->remove(pdev
, cpu_dai
);
1251 snd_soc_unregister_card(card
);
1256 static int soc_poweroff(struct device
*dev
)
1258 struct platform_device
*pdev
= to_platform_device(dev
);
1259 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1260 struct snd_soc_card
*card
= socdev
->card
;
1262 if (!card
->instantiated
)
1265 /* Flush out pmdown_time work - we actually do want to run it
1266 * now, we're shutting down so no imminent restart. */
1267 run_delayed_work(&card
->delayed_work
);
1269 snd_soc_dapm_shutdown(socdev
);
1274 static const struct dev_pm_ops soc_pm_ops
= {
1275 .suspend
= soc_suspend
,
1276 .resume
= soc_resume
,
1277 .poweroff
= soc_poweroff
,
1280 /* ASoC platform driver */
1281 static struct platform_driver soc_driver
= {
1283 .name
= "soc-audio",
1284 .owner
= THIS_MODULE
,
1288 .remove
= soc_remove
,
1291 /* create a new pcm */
1292 static int soc_new_pcm(struct snd_soc_device
*socdev
,
1293 struct snd_soc_dai_link
*dai_link
, int num
)
1295 struct snd_soc_card
*card
= socdev
->card
;
1296 struct snd_soc_codec
*codec
= card
->codec
;
1297 struct snd_soc_platform
*platform
= card
->platform
;
1298 struct snd_soc_dai
*codec_dai
= dai_link
->codec_dai
;
1299 struct snd_soc_dai
*cpu_dai
= dai_link
->cpu_dai
;
1300 struct snd_soc_pcm_runtime
*rtd
;
1301 struct snd_pcm
*pcm
;
1303 int ret
= 0, playback
= 0, capture
= 0;
1305 rtd
= kzalloc(sizeof(struct snd_soc_pcm_runtime
), GFP_KERNEL
);
1309 rtd
->dai
= dai_link
;
1310 rtd
->socdev
= socdev
;
1311 codec_dai
->codec
= card
->codec
;
1313 /* check client and interface hw capabilities */
1314 snprintf(new_name
, sizeof(new_name
), "%s %s-%d",
1315 dai_link
->stream_name
, codec_dai
->name
, num
);
1317 if (codec_dai
->playback
.channels_min
)
1319 if (codec_dai
->capture
.channels_min
)
1322 ret
= snd_pcm_new(codec
->card
, new_name
, codec
->pcm_devs
++, playback
,
1325 printk(KERN_ERR
"asoc: can't create pcm for codec %s\n",
1331 dai_link
->pcm
= pcm
;
1332 pcm
->private_data
= rtd
;
1333 soc_pcm_ops
.mmap
= platform
->pcm_ops
->mmap
;
1334 soc_pcm_ops
.pointer
= platform
->pcm_ops
->pointer
;
1335 soc_pcm_ops
.ioctl
= platform
->pcm_ops
->ioctl
;
1336 soc_pcm_ops
.copy
= platform
->pcm_ops
->copy
;
1337 soc_pcm_ops
.silence
= platform
->pcm_ops
->silence
;
1338 soc_pcm_ops
.ack
= platform
->pcm_ops
->ack
;
1339 soc_pcm_ops
.page
= platform
->pcm_ops
->page
;
1342 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &soc_pcm_ops
);
1345 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &soc_pcm_ops
);
1347 ret
= platform
->pcm_new(codec
->card
, codec_dai
, pcm
);
1349 printk(KERN_ERR
"asoc: platform pcm constructor failed\n");
1354 pcm
->private_free
= platform
->pcm_free
;
1355 printk(KERN_INFO
"asoc: %s <-> %s mapping ok\n", codec_dai
->name
,
1361 * snd_soc_codec_volatile_register: Report if a register is volatile.
1363 * @codec: CODEC to query.
1364 * @reg: Register to query.
1366 * Boolean function indiciating if a CODEC register is volatile.
1368 int snd_soc_codec_volatile_register(struct snd_soc_codec
*codec
, int reg
)
1370 if (codec
->volatile_register
)
1371 return codec
->volatile_register(reg
);
1375 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register
);
1378 * snd_soc_new_ac97_codec - initailise AC97 device
1379 * @codec: audio codec
1380 * @ops: AC97 bus operations
1381 * @num: AC97 codec number
1383 * Initialises AC97 codec resources for use by ad-hoc devices only.
1385 int snd_soc_new_ac97_codec(struct snd_soc_codec
*codec
,
1386 struct snd_ac97_bus_ops
*ops
, int num
)
1388 mutex_lock(&codec
->mutex
);
1390 codec
->ac97
= kzalloc(sizeof(struct snd_ac97
), GFP_KERNEL
);
1391 if (codec
->ac97
== NULL
) {
1392 mutex_unlock(&codec
->mutex
);
1396 codec
->ac97
->bus
= kzalloc(sizeof(struct snd_ac97_bus
), GFP_KERNEL
);
1397 if (codec
->ac97
->bus
== NULL
) {
1400 mutex_unlock(&codec
->mutex
);
1404 codec
->ac97
->bus
->ops
= ops
;
1405 codec
->ac97
->num
= num
;
1406 codec
->dev
= &codec
->ac97
->dev
;
1407 mutex_unlock(&codec
->mutex
);
1410 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec
);
1413 * snd_soc_free_ac97_codec - free AC97 codec device
1414 * @codec: audio codec
1416 * Frees AC97 codec device resources.
1418 void snd_soc_free_ac97_codec(struct snd_soc_codec
*codec
)
1420 mutex_lock(&codec
->mutex
);
1421 kfree(codec
->ac97
->bus
);
1424 mutex_unlock(&codec
->mutex
);
1426 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec
);
1429 * snd_soc_update_bits - update codec register bits
1430 * @codec: audio codec
1431 * @reg: codec register
1432 * @mask: register mask
1435 * Writes new register value.
1437 * Returns 1 for change else 0.
1439 int snd_soc_update_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1440 unsigned int mask
, unsigned int value
)
1443 unsigned int old
, new;
1445 old
= snd_soc_read(codec
, reg
);
1446 new = (old
& ~mask
) | value
;
1447 change
= old
!= new;
1449 snd_soc_write(codec
, reg
, new);
1453 EXPORT_SYMBOL_GPL(snd_soc_update_bits
);
1456 * snd_soc_update_bits_locked - update codec register bits
1457 * @codec: audio codec
1458 * @reg: codec register
1459 * @mask: register mask
1462 * Writes new register value, and takes the codec mutex.
1464 * Returns 1 for change else 0.
1466 int snd_soc_update_bits_locked(struct snd_soc_codec
*codec
,
1467 unsigned short reg
, unsigned int mask
,
1472 mutex_lock(&codec
->mutex
);
1473 change
= snd_soc_update_bits(codec
, reg
, mask
, value
);
1474 mutex_unlock(&codec
->mutex
);
1478 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked
);
1481 * snd_soc_test_bits - test register for change
1482 * @codec: audio codec
1483 * @reg: codec register
1484 * @mask: register mask
1487 * Tests a register with a new value and checks if the new value is
1488 * different from the old value.
1490 * Returns 1 for change else 0.
1492 int snd_soc_test_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1493 unsigned int mask
, unsigned int value
)
1496 unsigned int old
, new;
1498 old
= snd_soc_read(codec
, reg
);
1499 new = (old
& ~mask
) | value
;
1500 change
= old
!= new;
1504 EXPORT_SYMBOL_GPL(snd_soc_test_bits
);
1507 * snd_soc_new_pcms - create new sound card and pcms
1508 * @socdev: the SoC audio device
1509 * @idx: ALSA card index
1510 * @xid: card identification
1512 * Create a new sound card based upon the codec and interface pcms.
1514 * Returns 0 for success, else error.
1516 int snd_soc_new_pcms(struct snd_soc_device
*socdev
, int idx
, const char *xid
)
1518 struct snd_soc_card
*card
= socdev
->card
;
1519 struct snd_soc_codec
*codec
= card
->codec
;
1522 mutex_lock(&codec
->mutex
);
1524 /* register a sound card */
1525 ret
= snd_card_create(idx
, xid
, codec
->owner
, 0, &codec
->card
);
1527 printk(KERN_ERR
"asoc: can't create sound card for codec %s\n",
1529 mutex_unlock(&codec
->mutex
);
1533 codec
->socdev
= socdev
;
1534 codec
->card
->dev
= socdev
->dev
;
1535 codec
->card
->private_data
= codec
;
1536 strncpy(codec
->card
->driver
, codec
->name
, sizeof(codec
->card
->driver
));
1538 /* create the pcms */
1539 for (i
= 0; i
< card
->num_links
; i
++) {
1540 ret
= soc_new_pcm(socdev
, &card
->dai_link
[i
], i
);
1542 printk(KERN_ERR
"asoc: can't create pcm %s\n",
1543 card
->dai_link
[i
].stream_name
);
1544 mutex_unlock(&codec
->mutex
);
1547 if (card
->dai_link
[i
].codec_dai
->ac97_control
) {
1548 snd_ac97_dev_add_pdata(codec
->ac97
,
1549 card
->dai_link
[i
].cpu_dai
->ac97_pdata
);
1553 mutex_unlock(&codec
->mutex
);
1556 EXPORT_SYMBOL_GPL(snd_soc_new_pcms
);
1559 * snd_soc_free_pcms - free sound card and pcms
1560 * @socdev: the SoC audio device
1562 * Frees sound card and pcms associated with the socdev.
1563 * Also unregister the codec if it is an AC97 device.
1565 void snd_soc_free_pcms(struct snd_soc_device
*socdev
)
1567 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1568 #ifdef CONFIG_SND_SOC_AC97_BUS
1569 struct snd_soc_dai
*codec_dai
;
1573 mutex_lock(&codec
->mutex
);
1574 soc_cleanup_codec_debugfs(codec
);
1575 #ifdef CONFIG_SND_SOC_AC97_BUS
1576 for (i
= 0; i
< codec
->num_dai
; i
++) {
1577 codec_dai
= &codec
->dai
[i
];
1578 if (codec_dai
->ac97_control
&& codec
->ac97
&&
1579 strcmp(codec
->name
, "AC97") != 0) {
1580 soc_ac97_dev_unregister(codec
);
1588 snd_card_free(codec
->card
);
1589 device_remove_file(socdev
->dev
, &dev_attr_codec_reg
);
1590 mutex_unlock(&codec
->mutex
);
1592 EXPORT_SYMBOL_GPL(snd_soc_free_pcms
);
1595 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1596 * @substream: the pcm substream
1597 * @hw: the hardware parameters
1599 * Sets the substream runtime hardware parameters.
1601 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
1602 const struct snd_pcm_hardware
*hw
)
1604 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1605 runtime
->hw
.info
= hw
->info
;
1606 runtime
->hw
.formats
= hw
->formats
;
1607 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
1608 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
1609 runtime
->hw
.periods_min
= hw
->periods_min
;
1610 runtime
->hw
.periods_max
= hw
->periods_max
;
1611 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
1612 runtime
->hw
.fifo_size
= hw
->fifo_size
;
1615 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
1618 * snd_soc_cnew - create new control
1619 * @_template: control template
1620 * @data: control private data
1621 * @long_name: control long name
1623 * Create a new mixer control from a template control.
1625 * Returns 0 for success, else error.
1627 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
1628 void *data
, char *long_name
)
1630 struct snd_kcontrol_new
template;
1632 memcpy(&template, _template
, sizeof(template));
1634 template.name
= long_name
;
1637 return snd_ctl_new1(&template, data
);
1639 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
1642 * snd_soc_add_controls - add an array of controls to a codec.
1643 * Convienience function to add a list of controls. Many codecs were
1644 * duplicating this code.
1646 * @codec: codec to add controls to
1647 * @controls: array of controls to add
1648 * @num_controls: number of elements in the array
1650 * Return 0 for success, else error.
1652 int snd_soc_add_controls(struct snd_soc_codec
*codec
,
1653 const struct snd_kcontrol_new
*controls
, int num_controls
)
1655 struct snd_card
*card
= codec
->card
;
1658 for (i
= 0; i
< num_controls
; i
++) {
1659 const struct snd_kcontrol_new
*control
= &controls
[i
];
1660 err
= snd_ctl_add(card
, snd_soc_cnew(control
, codec
, NULL
));
1662 dev_err(codec
->dev
, "%s: Failed to add %s\n",
1663 codec
->name
, control
->name
);
1670 EXPORT_SYMBOL_GPL(snd_soc_add_controls
);
1673 * snd_soc_info_enum_double - enumerated double mixer info callback
1674 * @kcontrol: mixer control
1675 * @uinfo: control element information
1677 * Callback to provide information about a double enumerated
1680 * Returns 0 for success.
1682 int snd_soc_info_enum_double(struct snd_kcontrol
*kcontrol
,
1683 struct snd_ctl_elem_info
*uinfo
)
1685 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1687 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1688 uinfo
->count
= e
->shift_l
== e
->shift_r
? 1 : 2;
1689 uinfo
->value
.enumerated
.items
= e
->max
;
1691 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1692 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1693 strcpy(uinfo
->value
.enumerated
.name
,
1694 e
->texts
[uinfo
->value
.enumerated
.item
]);
1697 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double
);
1700 * snd_soc_get_enum_double - enumerated double mixer get callback
1701 * @kcontrol: mixer control
1702 * @ucontrol: control element information
1704 * Callback to get the value of a double enumerated mixer.
1706 * Returns 0 for success.
1708 int snd_soc_get_enum_double(struct snd_kcontrol
*kcontrol
,
1709 struct snd_ctl_elem_value
*ucontrol
)
1711 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1712 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1713 unsigned int val
, bitmask
;
1715 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1717 val
= snd_soc_read(codec
, e
->reg
);
1718 ucontrol
->value
.enumerated
.item
[0]
1719 = (val
>> e
->shift_l
) & (bitmask
- 1);
1720 if (e
->shift_l
!= e
->shift_r
)
1721 ucontrol
->value
.enumerated
.item
[1] =
1722 (val
>> e
->shift_r
) & (bitmask
- 1);
1726 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double
);
1729 * snd_soc_put_enum_double - enumerated double mixer put callback
1730 * @kcontrol: mixer control
1731 * @ucontrol: control element information
1733 * Callback to set the value of a double enumerated mixer.
1735 * Returns 0 for success.
1737 int snd_soc_put_enum_double(struct snd_kcontrol
*kcontrol
,
1738 struct snd_ctl_elem_value
*ucontrol
)
1740 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1741 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1743 unsigned int mask
, bitmask
;
1745 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1747 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1749 val
= ucontrol
->value
.enumerated
.item
[0] << e
->shift_l
;
1750 mask
= (bitmask
- 1) << e
->shift_l
;
1751 if (e
->shift_l
!= e
->shift_r
) {
1752 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1754 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1755 mask
|= (bitmask
- 1) << e
->shift_r
;
1758 return snd_soc_update_bits_locked(codec
, e
->reg
, mask
, val
);
1760 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double
);
1763 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1764 * @kcontrol: mixer control
1765 * @ucontrol: control element information
1767 * Callback to get the value of a double semi enumerated mixer.
1769 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1770 * used for handling bitfield coded enumeration for example.
1772 * Returns 0 for success.
1774 int snd_soc_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1775 struct snd_ctl_elem_value
*ucontrol
)
1777 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1778 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1779 unsigned int reg_val
, val
, mux
;
1781 reg_val
= snd_soc_read(codec
, e
->reg
);
1782 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1783 for (mux
= 0; mux
< e
->max
; mux
++) {
1784 if (val
== e
->values
[mux
])
1787 ucontrol
->value
.enumerated
.item
[0] = mux
;
1788 if (e
->shift_l
!= e
->shift_r
) {
1789 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1790 for (mux
= 0; mux
< e
->max
; mux
++) {
1791 if (val
== e
->values
[mux
])
1794 ucontrol
->value
.enumerated
.item
[1] = mux
;
1799 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double
);
1802 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1803 * @kcontrol: mixer control
1804 * @ucontrol: control element information
1806 * Callback to set the value of a double semi enumerated mixer.
1808 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1809 * used for handling bitfield coded enumeration for example.
1811 * Returns 0 for success.
1813 int snd_soc_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1814 struct snd_ctl_elem_value
*ucontrol
)
1816 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1817 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1821 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1823 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1824 mask
= e
->mask
<< e
->shift_l
;
1825 if (e
->shift_l
!= e
->shift_r
) {
1826 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1828 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1829 mask
|= e
->mask
<< e
->shift_r
;
1832 return snd_soc_update_bits_locked(codec
, e
->reg
, mask
, val
);
1834 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double
);
1837 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1838 * @kcontrol: mixer control
1839 * @uinfo: control element information
1841 * Callback to provide information about an external enumerated
1844 * Returns 0 for success.
1846 int snd_soc_info_enum_ext(struct snd_kcontrol
*kcontrol
,
1847 struct snd_ctl_elem_info
*uinfo
)
1849 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1851 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1853 uinfo
->value
.enumerated
.items
= e
->max
;
1855 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1856 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1857 strcpy(uinfo
->value
.enumerated
.name
,
1858 e
->texts
[uinfo
->value
.enumerated
.item
]);
1861 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext
);
1864 * snd_soc_info_volsw_ext - external single mixer info callback
1865 * @kcontrol: mixer control
1866 * @uinfo: control element information
1868 * Callback to provide information about a single external mixer control.
1870 * Returns 0 for success.
1872 int snd_soc_info_volsw_ext(struct snd_kcontrol
*kcontrol
,
1873 struct snd_ctl_elem_info
*uinfo
)
1875 int max
= kcontrol
->private_value
;
1877 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1878 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1880 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1883 uinfo
->value
.integer
.min
= 0;
1884 uinfo
->value
.integer
.max
= max
;
1887 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext
);
1890 * snd_soc_info_volsw - single mixer info callback
1891 * @kcontrol: mixer control
1892 * @uinfo: control element information
1894 * Callback to provide information about a single mixer control.
1896 * Returns 0 for success.
1898 int snd_soc_info_volsw(struct snd_kcontrol
*kcontrol
,
1899 struct snd_ctl_elem_info
*uinfo
)
1901 struct soc_mixer_control
*mc
=
1902 (struct soc_mixer_control
*)kcontrol
->private_value
;
1904 unsigned int shift
= mc
->shift
;
1905 unsigned int rshift
= mc
->rshift
;
1907 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1908 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1910 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1912 uinfo
->count
= shift
== rshift
? 1 : 2;
1913 uinfo
->value
.integer
.min
= 0;
1914 uinfo
->value
.integer
.max
= max
;
1917 EXPORT_SYMBOL_GPL(snd_soc_info_volsw
);
1920 * snd_soc_get_volsw - single mixer get callback
1921 * @kcontrol: mixer control
1922 * @ucontrol: control element information
1924 * Callback to get the value of a single mixer control.
1926 * Returns 0 for success.
1928 int snd_soc_get_volsw(struct snd_kcontrol
*kcontrol
,
1929 struct snd_ctl_elem_value
*ucontrol
)
1931 struct soc_mixer_control
*mc
=
1932 (struct soc_mixer_control
*)kcontrol
->private_value
;
1933 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1934 unsigned int reg
= mc
->reg
;
1935 unsigned int shift
= mc
->shift
;
1936 unsigned int rshift
= mc
->rshift
;
1938 unsigned int mask
= (1 << fls(max
)) - 1;
1939 unsigned int invert
= mc
->invert
;
1941 ucontrol
->value
.integer
.value
[0] =
1942 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1943 if (shift
!= rshift
)
1944 ucontrol
->value
.integer
.value
[1] =
1945 (snd_soc_read(codec
, reg
) >> rshift
) & mask
;
1947 ucontrol
->value
.integer
.value
[0] =
1948 max
- ucontrol
->value
.integer
.value
[0];
1949 if (shift
!= rshift
)
1950 ucontrol
->value
.integer
.value
[1] =
1951 max
- ucontrol
->value
.integer
.value
[1];
1956 EXPORT_SYMBOL_GPL(snd_soc_get_volsw
);
1959 * snd_soc_put_volsw - single mixer put callback
1960 * @kcontrol: mixer control
1961 * @ucontrol: control element information
1963 * Callback to set the value of a single mixer control.
1965 * Returns 0 for success.
1967 int snd_soc_put_volsw(struct snd_kcontrol
*kcontrol
,
1968 struct snd_ctl_elem_value
*ucontrol
)
1970 struct soc_mixer_control
*mc
=
1971 (struct soc_mixer_control
*)kcontrol
->private_value
;
1972 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1973 unsigned int reg
= mc
->reg
;
1974 unsigned int shift
= mc
->shift
;
1975 unsigned int rshift
= mc
->rshift
;
1977 unsigned int mask
= (1 << fls(max
)) - 1;
1978 unsigned int invert
= mc
->invert
;
1979 unsigned int val
, val2
, val_mask
;
1981 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1984 val_mask
= mask
<< shift
;
1986 if (shift
!= rshift
) {
1987 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1990 val_mask
|= mask
<< rshift
;
1991 val
|= val2
<< rshift
;
1993 return snd_soc_update_bits_locked(codec
, reg
, val_mask
, val
);
1995 EXPORT_SYMBOL_GPL(snd_soc_put_volsw
);
1998 * snd_soc_info_volsw_2r - double mixer info callback
1999 * @kcontrol: mixer control
2000 * @uinfo: control element information
2002 * Callback to provide information about a double mixer control that
2003 * spans 2 codec registers.
2005 * Returns 0 for success.
2007 int snd_soc_info_volsw_2r(struct snd_kcontrol
*kcontrol
,
2008 struct snd_ctl_elem_info
*uinfo
)
2010 struct soc_mixer_control
*mc
=
2011 (struct soc_mixer_control
*)kcontrol
->private_value
;
2014 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
2015 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2017 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2020 uinfo
->value
.integer
.min
= 0;
2021 uinfo
->value
.integer
.max
= max
;
2024 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r
);
2027 * snd_soc_get_volsw_2r - double mixer get callback
2028 * @kcontrol: mixer control
2029 * @ucontrol: control element information
2031 * Callback to get the value of a double mixer control that spans 2 registers.
2033 * Returns 0 for success.
2035 int snd_soc_get_volsw_2r(struct snd_kcontrol
*kcontrol
,
2036 struct snd_ctl_elem_value
*ucontrol
)
2038 struct soc_mixer_control
*mc
=
2039 (struct soc_mixer_control
*)kcontrol
->private_value
;
2040 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2041 unsigned int reg
= mc
->reg
;
2042 unsigned int reg2
= mc
->rreg
;
2043 unsigned int shift
= mc
->shift
;
2045 unsigned int mask
= (1 << fls(max
)) - 1;
2046 unsigned int invert
= mc
->invert
;
2048 ucontrol
->value
.integer
.value
[0] =
2049 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
2050 ucontrol
->value
.integer
.value
[1] =
2051 (snd_soc_read(codec
, reg2
) >> shift
) & mask
;
2053 ucontrol
->value
.integer
.value
[0] =
2054 max
- ucontrol
->value
.integer
.value
[0];
2055 ucontrol
->value
.integer
.value
[1] =
2056 max
- ucontrol
->value
.integer
.value
[1];
2061 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r
);
2064 * snd_soc_put_volsw_2r - double mixer set callback
2065 * @kcontrol: mixer control
2066 * @ucontrol: control element information
2068 * Callback to set the value of a double mixer control that spans 2 registers.
2070 * Returns 0 for success.
2072 int snd_soc_put_volsw_2r(struct snd_kcontrol
*kcontrol
,
2073 struct snd_ctl_elem_value
*ucontrol
)
2075 struct soc_mixer_control
*mc
=
2076 (struct soc_mixer_control
*)kcontrol
->private_value
;
2077 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2078 unsigned int reg
= mc
->reg
;
2079 unsigned int reg2
= mc
->rreg
;
2080 unsigned int shift
= mc
->shift
;
2082 unsigned int mask
= (1 << fls(max
)) - 1;
2083 unsigned int invert
= mc
->invert
;
2085 unsigned int val
, val2
, val_mask
;
2087 val_mask
= mask
<< shift
;
2088 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2089 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
2097 val2
= val2
<< shift
;
2099 err
= snd_soc_update_bits_locked(codec
, reg
, val_mask
, val
);
2103 err
= snd_soc_update_bits_locked(codec
, reg2
, val_mask
, val2
);
2106 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r
);
2109 * snd_soc_info_volsw_s8 - signed mixer info callback
2110 * @kcontrol: mixer control
2111 * @uinfo: control element information
2113 * Callback to provide information about a signed mixer control.
2115 * Returns 0 for success.
2117 int snd_soc_info_volsw_s8(struct snd_kcontrol
*kcontrol
,
2118 struct snd_ctl_elem_info
*uinfo
)
2120 struct soc_mixer_control
*mc
=
2121 (struct soc_mixer_control
*)kcontrol
->private_value
;
2125 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2127 uinfo
->value
.integer
.min
= 0;
2128 uinfo
->value
.integer
.max
= max
-min
;
2131 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8
);
2134 * snd_soc_get_volsw_s8 - signed mixer get callback
2135 * @kcontrol: mixer control
2136 * @ucontrol: control element information
2138 * Callback to get the value of a signed mixer control.
2140 * Returns 0 for success.
2142 int snd_soc_get_volsw_s8(struct snd_kcontrol
*kcontrol
,
2143 struct snd_ctl_elem_value
*ucontrol
)
2145 struct soc_mixer_control
*mc
=
2146 (struct soc_mixer_control
*)kcontrol
->private_value
;
2147 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2148 unsigned int reg
= mc
->reg
;
2150 int val
= snd_soc_read(codec
, reg
);
2152 ucontrol
->value
.integer
.value
[0] =
2153 ((signed char)(val
& 0xff))-min
;
2154 ucontrol
->value
.integer
.value
[1] =
2155 ((signed char)((val
>> 8) & 0xff))-min
;
2158 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8
);
2161 * snd_soc_put_volsw_sgn - signed mixer put callback
2162 * @kcontrol: mixer control
2163 * @ucontrol: control element information
2165 * Callback to set the value of a signed mixer control.
2167 * Returns 0 for success.
2169 int snd_soc_put_volsw_s8(struct snd_kcontrol
*kcontrol
,
2170 struct snd_ctl_elem_value
*ucontrol
)
2172 struct soc_mixer_control
*mc
=
2173 (struct soc_mixer_control
*)kcontrol
->private_value
;
2174 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2175 unsigned int reg
= mc
->reg
;
2179 val
= (ucontrol
->value
.integer
.value
[0]+min
) & 0xff;
2180 val
|= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff) << 8;
2182 return snd_soc_update_bits_locked(codec
, reg
, 0xffff, val
);
2184 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8
);
2187 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2189 * @clk_id: DAI specific clock ID
2190 * @freq: new clock frequency in Hz
2191 * @dir: new clock direction - input/output.
2193 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2195 int snd_soc_dai_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
2196 unsigned int freq
, int dir
)
2198 if (dai
->ops
&& dai
->ops
->set_sysclk
)
2199 return dai
->ops
->set_sysclk(dai
, clk_id
, freq
, dir
);
2203 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk
);
2206 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2208 * @div_id: DAI specific clock divider ID
2209 * @div: new clock divisor.
2211 * Configures the clock dividers. This is used to derive the best DAI bit and
2212 * frame clocks from the system or master clock. It's best to set the DAI bit
2213 * and frame clocks as low as possible to save system power.
2215 int snd_soc_dai_set_clkdiv(struct snd_soc_dai
*dai
,
2216 int div_id
, int div
)
2218 if (dai
->ops
&& dai
->ops
->set_clkdiv
)
2219 return dai
->ops
->set_clkdiv(dai
, div_id
, div
);
2223 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv
);
2226 * snd_soc_dai_set_pll - configure DAI PLL.
2228 * @pll_id: DAI specific PLL ID
2229 * @source: DAI specific source for the PLL
2230 * @freq_in: PLL input clock frequency in Hz
2231 * @freq_out: requested PLL output clock frequency in Hz
2233 * Configures and enables PLL to generate output clock based on input clock.
2235 int snd_soc_dai_set_pll(struct snd_soc_dai
*dai
, int pll_id
, int source
,
2236 unsigned int freq_in
, unsigned int freq_out
)
2238 if (dai
->ops
&& dai
->ops
->set_pll
)
2239 return dai
->ops
->set_pll(dai
, pll_id
, source
,
2244 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll
);
2247 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2249 * @fmt: SND_SOC_DAIFMT_ format value.
2251 * Configures the DAI hardware format and clocking.
2253 int snd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
2255 if (dai
->ops
&& dai
->ops
->set_fmt
)
2256 return dai
->ops
->set_fmt(dai
, fmt
);
2260 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt
);
2263 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2265 * @tx_mask: bitmask representing active TX slots.
2266 * @rx_mask: bitmask representing active RX slots.
2267 * @slots: Number of slots in use.
2268 * @slot_width: Width in bits for each slot.
2270 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2273 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai
*dai
,
2274 unsigned int tx_mask
, unsigned int rx_mask
, int slots
, int slot_width
)
2276 if (dai
->ops
&& dai
->ops
->set_tdm_slot
)
2277 return dai
->ops
->set_tdm_slot(dai
, tx_mask
, rx_mask
,
2282 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot
);
2285 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2287 * @tx_num: how many TX channels
2288 * @tx_slot: pointer to an array which imply the TX slot number channel
2290 * @rx_num: how many RX channels
2291 * @rx_slot: pointer to an array which imply the RX slot number channel
2294 * configure the relationship between channel number and TDM slot number.
2296 int snd_soc_dai_set_channel_map(struct snd_soc_dai
*dai
,
2297 unsigned int tx_num
, unsigned int *tx_slot
,
2298 unsigned int rx_num
, unsigned int *rx_slot
)
2300 if (dai
->ops
&& dai
->ops
->set_channel_map
)
2301 return dai
->ops
->set_channel_map(dai
, tx_num
, tx_slot
,
2306 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map
);
2309 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2311 * @tristate: tristate enable
2313 * Tristates the DAI so that others can use it.
2315 int snd_soc_dai_set_tristate(struct snd_soc_dai
*dai
, int tristate
)
2317 if (dai
->ops
&& dai
->ops
->set_tristate
)
2318 return dai
->ops
->set_tristate(dai
, tristate
);
2322 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate
);
2325 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2327 * @mute: mute enable
2329 * Mutes the DAI DAC.
2331 int snd_soc_dai_digital_mute(struct snd_soc_dai
*dai
, int mute
)
2333 if (dai
->ops
&& dai
->ops
->digital_mute
)
2334 return dai
->ops
->digital_mute(dai
, mute
);
2338 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute
);
2341 * snd_soc_register_card - Register a card with the ASoC core
2343 * @card: Card to register
2345 * Note that currently this is an internal only function: it will be
2346 * exposed to machine drivers after further backporting of ASoC v2
2347 * registration APIs.
2349 static int snd_soc_register_card(struct snd_soc_card
*card
)
2351 if (!card
->name
|| !card
->dev
)
2354 INIT_LIST_HEAD(&card
->list
);
2355 card
->instantiated
= 0;
2357 mutex_lock(&client_mutex
);
2358 list_add(&card
->list
, &card_list
);
2359 snd_soc_instantiate_cards();
2360 mutex_unlock(&client_mutex
);
2362 dev_dbg(card
->dev
, "Registered card '%s'\n", card
->name
);
2368 * snd_soc_unregister_card - Unregister a card with the ASoC core
2370 * @card: Card to unregister
2372 * Note that currently this is an internal only function: it will be
2373 * exposed to machine drivers after further backporting of ASoC v2
2374 * registration APIs.
2376 static int snd_soc_unregister_card(struct snd_soc_card
*card
)
2378 mutex_lock(&client_mutex
);
2379 list_del(&card
->list
);
2380 mutex_unlock(&client_mutex
);
2382 dev_dbg(card
->dev
, "Unregistered card '%s'\n", card
->name
);
2388 * snd_soc_register_dai - Register a DAI with the ASoC core
2390 * @dai: DAI to register
2392 int snd_soc_register_dai(struct snd_soc_dai
*dai
)
2397 /* The device should become mandatory over time */
2399 printk(KERN_WARNING
"No device for DAI %s\n", dai
->name
);
2402 dai
->ops
= &null_dai_ops
;
2404 INIT_LIST_HEAD(&dai
->list
);
2406 mutex_lock(&client_mutex
);
2407 list_add(&dai
->list
, &dai_list
);
2408 snd_soc_instantiate_cards();
2409 mutex_unlock(&client_mutex
);
2411 pr_debug("Registered DAI '%s'\n", dai
->name
);
2415 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2418 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2420 * @dai: DAI to unregister
2422 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2424 mutex_lock(&client_mutex
);
2425 list_del(&dai
->list
);
2426 mutex_unlock(&client_mutex
);
2428 pr_debug("Unregistered DAI '%s'\n", dai
->name
);
2430 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2433 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2435 * @dai: Array of DAIs to register
2436 * @count: Number of DAIs
2438 int snd_soc_register_dais(struct snd_soc_dai
*dai
, size_t count
)
2442 for (i
= 0; i
< count
; i
++) {
2443 ret
= snd_soc_register_dai(&dai
[i
]);
2451 for (i
--; i
>= 0; i
--)
2452 snd_soc_unregister_dai(&dai
[i
]);
2456 EXPORT_SYMBOL_GPL(snd_soc_register_dais
);
2459 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2461 * @dai: Array of DAIs to unregister
2462 * @count: Number of DAIs
2464 void snd_soc_unregister_dais(struct snd_soc_dai
*dai
, size_t count
)
2468 for (i
= 0; i
< count
; i
++)
2469 snd_soc_unregister_dai(&dai
[i
]);
2471 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais
);
2474 * snd_soc_register_platform - Register a platform with the ASoC core
2476 * @platform: platform to register
2478 int snd_soc_register_platform(struct snd_soc_platform
*platform
)
2480 if (!platform
->name
)
2483 INIT_LIST_HEAD(&platform
->list
);
2485 mutex_lock(&client_mutex
);
2486 list_add(&platform
->list
, &platform_list
);
2487 snd_soc_instantiate_cards();
2488 mutex_unlock(&client_mutex
);
2490 pr_debug("Registered platform '%s'\n", platform
->name
);
2494 EXPORT_SYMBOL_GPL(snd_soc_register_platform
);
2497 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2499 * @platform: platform to unregister
2501 void snd_soc_unregister_platform(struct snd_soc_platform
*platform
)
2503 mutex_lock(&client_mutex
);
2504 list_del(&platform
->list
);
2505 mutex_unlock(&client_mutex
);
2507 pr_debug("Unregistered platform '%s'\n", platform
->name
);
2509 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform
);
2511 static u64 codec_format_map
[] = {
2512 SNDRV_PCM_FMTBIT_S16_LE
| SNDRV_PCM_FMTBIT_S16_BE
,
2513 SNDRV_PCM_FMTBIT_U16_LE
| SNDRV_PCM_FMTBIT_U16_BE
,
2514 SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S24_BE
,
2515 SNDRV_PCM_FMTBIT_U24_LE
| SNDRV_PCM_FMTBIT_U24_BE
,
2516 SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S32_BE
,
2517 SNDRV_PCM_FMTBIT_U32_LE
| SNDRV_PCM_FMTBIT_U32_BE
,
2518 SNDRV_PCM_FMTBIT_S24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2519 SNDRV_PCM_FMTBIT_U24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2520 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S20_3BE
,
2521 SNDRV_PCM_FMTBIT_U20_3LE
| SNDRV_PCM_FMTBIT_U20_3BE
,
2522 SNDRV_PCM_FMTBIT_S18_3LE
| SNDRV_PCM_FMTBIT_S18_3BE
,
2523 SNDRV_PCM_FMTBIT_U18_3LE
| SNDRV_PCM_FMTBIT_U18_3BE
,
2524 SNDRV_PCM_FMTBIT_FLOAT_LE
| SNDRV_PCM_FMTBIT_FLOAT_BE
,
2525 SNDRV_PCM_FMTBIT_FLOAT64_LE
| SNDRV_PCM_FMTBIT_FLOAT64_BE
,
2526 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2527 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
,
2530 /* Fix up the DAI formats for endianness: codecs don't actually see
2531 * the endianness of the data but we're using the CPU format
2532 * definitions which do need to include endianness so we ensure that
2533 * codec DAIs always have both big and little endian variants set.
2535 static void fixup_codec_formats(struct snd_soc_pcm_stream
*stream
)
2539 for (i
= 0; i
< ARRAY_SIZE(codec_format_map
); i
++)
2540 if (stream
->formats
& codec_format_map
[i
])
2541 stream
->formats
|= codec_format_map
[i
];
2545 * snd_soc_register_codec - Register a codec with the ASoC core
2547 * @codec: codec to register
2549 int snd_soc_register_codec(struct snd_soc_codec
*codec
)
2556 /* The device should become mandatory over time */
2558 printk(KERN_WARNING
"No device for codec %s\n", codec
->name
);
2560 INIT_LIST_HEAD(&codec
->list
);
2562 for (i
= 0; i
< codec
->num_dai
; i
++) {
2563 fixup_codec_formats(&codec
->dai
[i
].playback
);
2564 fixup_codec_formats(&codec
->dai
[i
].capture
);
2567 mutex_lock(&client_mutex
);
2568 list_add(&codec
->list
, &codec_list
);
2569 snd_soc_instantiate_cards();
2570 mutex_unlock(&client_mutex
);
2572 pr_debug("Registered codec '%s'\n", codec
->name
);
2576 EXPORT_SYMBOL_GPL(snd_soc_register_codec
);
2579 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2581 * @codec: codec to unregister
2583 void snd_soc_unregister_codec(struct snd_soc_codec
*codec
)
2585 mutex_lock(&client_mutex
);
2586 list_del(&codec
->list
);
2587 mutex_unlock(&client_mutex
);
2589 pr_debug("Unregistered codec '%s'\n", codec
->name
);
2591 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec
);
2593 static int __init
snd_soc_init(void)
2595 #ifdef CONFIG_DEBUG_FS
2596 debugfs_root
= debugfs_create_dir("asoc", NULL
);
2597 if (IS_ERR(debugfs_root
) || !debugfs_root
) {
2599 "ASoC: Failed to create debugfs directory\n");
2600 debugfs_root
= NULL
;
2604 return platform_driver_register(&soc_driver
);
2607 static void __exit
snd_soc_exit(void)
2609 #ifdef CONFIG_DEBUG_FS
2610 debugfs_remove_recursive(debugfs_root
);
2612 platform_driver_unregister(&soc_driver
);
2615 module_init(snd_soc_init
);
2616 module_exit(snd_soc_exit
);
2618 /* Module information */
2619 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2620 MODULE_DESCRIPTION("ALSA SoC Core");
2621 MODULE_LICENSE("GPL");
2622 MODULE_ALIAS("platform:soc-audio");