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 <linux/slab.h>
32 #include <sound/ac97_codec.h>
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/soc.h>
37 #include <sound/soc-dapm.h>
38 #include <sound/initval.h>
40 static DEFINE_MUTEX(pcm_mutex
);
41 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq
);
43 #ifdef CONFIG_DEBUG_FS
44 static struct dentry
*debugfs_root
;
47 static DEFINE_MUTEX(client_mutex
);
48 static LIST_HEAD(card_list
);
49 static LIST_HEAD(dai_list
);
50 static LIST_HEAD(platform_list
);
51 static LIST_HEAD(codec_list
);
53 static int snd_soc_register_card(struct snd_soc_card
*card
);
54 static int snd_soc_unregister_card(struct snd_soc_card
*card
);
57 * This is a timeout to do a DAPM powerdown after a stream is closed().
58 * It can be used to eliminate pops between different playback streams, e.g.
59 * between two audio tracks.
61 static int pmdown_time
= 5000;
62 module_param(pmdown_time
, int, 0);
63 MODULE_PARM_DESC(pmdown_time
, "DAPM stream powerdown time (msecs)");
66 * This function forces any delayed work to be queued and run.
68 static int run_delayed_work(struct delayed_work
*dwork
)
72 /* cancel any work waiting to be queued. */
73 ret
= cancel_delayed_work(dwork
);
75 /* if there was any work waiting then we run it now and
76 * wait for it's completion */
78 schedule_delayed_work(dwork
, 0);
79 flush_scheduled_work();
84 /* codec register dump */
85 static ssize_t
soc_codec_reg_show(struct snd_soc_codec
*codec
, char *buf
)
87 int ret
, i
, step
= 1, count
= 0;
89 if (!codec
->reg_cache_size
)
92 if (codec
->reg_cache_step
)
93 step
= codec
->reg_cache_step
;
95 count
+= sprintf(buf
, "%s registers\n", codec
->name
);
96 for (i
= 0; i
< codec
->reg_cache_size
; i
+= step
) {
97 if (codec
->readable_register
&& !codec
->readable_register(i
))
100 count
+= sprintf(buf
+ count
, "%2x: ", i
);
101 if (count
>= PAGE_SIZE
- 1)
104 if (codec
->display_register
) {
105 count
+= codec
->display_register(codec
, buf
+ count
,
106 PAGE_SIZE
- count
, i
);
108 /* If the read fails it's almost certainly due to
109 * the register being volatile and the device being
112 ret
= codec
->read(codec
, i
);
114 count
+= snprintf(buf
+ count
,
118 count
+= snprintf(buf
+ count
,
120 "<no data: %d>", ret
);
123 if (count
>= PAGE_SIZE
- 1)
126 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
, "\n");
127 if (count
>= PAGE_SIZE
- 1)
131 /* Truncate count; min() would cause a warning */
132 if (count
>= PAGE_SIZE
)
133 count
= PAGE_SIZE
- 1;
137 static ssize_t
codec_reg_show(struct device
*dev
,
138 struct device_attribute
*attr
, char *buf
)
140 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
141 return soc_codec_reg_show(devdata
->card
->codec
, buf
);
144 static DEVICE_ATTR(codec_reg
, 0444, codec_reg_show
, NULL
);
146 static ssize_t
pmdown_time_show(struct device
*dev
,
147 struct device_attribute
*attr
, char *buf
)
149 struct snd_soc_device
*socdev
= dev_get_drvdata(dev
);
150 struct snd_soc_card
*card
= socdev
->card
;
152 return sprintf(buf
, "%ld\n", card
->pmdown_time
);
155 static ssize_t
pmdown_time_set(struct device
*dev
,
156 struct device_attribute
*attr
,
157 const char *buf
, size_t count
)
159 struct snd_soc_device
*socdev
= dev_get_drvdata(dev
);
160 struct snd_soc_card
*card
= socdev
->card
;
162 strict_strtol(buf
, 10, &card
->pmdown_time
);
167 static DEVICE_ATTR(pmdown_time
, 0644, pmdown_time_show
, pmdown_time_set
);
169 #ifdef CONFIG_DEBUG_FS
170 static int codec_reg_open_file(struct inode
*inode
, struct file
*file
)
172 file
->private_data
= inode
->i_private
;
176 static ssize_t
codec_reg_read_file(struct file
*file
, char __user
*user_buf
,
177 size_t count
, loff_t
*ppos
)
180 struct snd_soc_codec
*codec
= file
->private_data
;
181 char *buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
184 ret
= soc_codec_reg_show(codec
, buf
);
186 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
191 static ssize_t
codec_reg_write_file(struct file
*file
,
192 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
197 unsigned long reg
, value
;
199 struct snd_soc_codec
*codec
= file
->private_data
;
201 buf_size
= min(count
, (sizeof(buf
)-1));
202 if (copy_from_user(buf
, user_buf
, buf_size
))
206 if (codec
->reg_cache_step
)
207 step
= codec
->reg_cache_step
;
209 while (*start
== ' ')
211 reg
= simple_strtoul(start
, &start
, 16);
212 if ((reg
>= codec
->reg_cache_size
) || (reg
% step
))
214 while (*start
== ' ')
216 if (strict_strtoul(start
, 16, &value
))
218 codec
->write(codec
, reg
, value
);
222 static const struct file_operations codec_reg_fops
= {
223 .open
= codec_reg_open_file
,
224 .read
= codec_reg_read_file
,
225 .write
= codec_reg_write_file
,
226 .llseek
= default_llseek
,
229 static void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
231 char codec_root
[128];
234 snprintf(codec_root
, sizeof(codec_root
),
235 "%s.%s", codec
->name
, dev_name(codec
->dev
));
237 snprintf(codec_root
, sizeof(codec_root
),
240 codec
->debugfs_codec_root
= debugfs_create_dir(codec_root
,
242 if (!codec
->debugfs_codec_root
) {
244 "ASoC: Failed to create codec debugfs directory\n");
248 codec
->debugfs_reg
= debugfs_create_file("codec_reg", 0644,
249 codec
->debugfs_codec_root
,
250 codec
, &codec_reg_fops
);
251 if (!codec
->debugfs_reg
)
253 "ASoC: Failed to create codec register debugfs file\n");
255 codec
->debugfs_pop_time
= debugfs_create_u32("dapm_pop_time", 0644,
256 codec
->debugfs_codec_root
,
258 if (!codec
->debugfs_pop_time
)
260 "Failed to create pop time debugfs file\n");
262 codec
->debugfs_dapm
= debugfs_create_dir("dapm",
263 codec
->debugfs_codec_root
);
264 if (!codec
->debugfs_dapm
)
266 "Failed to create DAPM debugfs directory\n");
268 snd_soc_dapm_debugfs_init(codec
);
271 static void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
273 debugfs_remove_recursive(codec
->debugfs_codec_root
);
278 static inline void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
282 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
287 #ifdef CONFIG_SND_SOC_AC97_BUS
288 /* unregister ac97 codec */
289 static int soc_ac97_dev_unregister(struct snd_soc_codec
*codec
)
291 if (codec
->ac97
->dev
.bus
)
292 device_unregister(&codec
->ac97
->dev
);
296 /* stop no dev release warning */
297 static void soc_ac97_device_release(struct device
*dev
){}
299 /* register ac97 codec to bus */
300 static int soc_ac97_dev_register(struct snd_soc_codec
*codec
)
304 codec
->ac97
->dev
.bus
= &ac97_bus_type
;
305 codec
->ac97
->dev
.parent
= codec
->card
->dev
;
306 codec
->ac97
->dev
.release
= soc_ac97_device_release
;
308 dev_set_name(&codec
->ac97
->dev
, "%d-%d:%s",
309 codec
->card
->number
, 0, codec
->name
);
310 err
= device_register(&codec
->ac97
->dev
);
312 snd_printk(KERN_ERR
"Can't register ac97 bus\n");
313 codec
->ac97
->dev
.bus
= NULL
;
320 static int soc_pcm_apply_symmetry(struct snd_pcm_substream
*substream
)
322 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
323 struct snd_soc_device
*socdev
= rtd
->socdev
;
324 struct snd_soc_card
*card
= socdev
->card
;
325 struct snd_soc_dai_link
*machine
= rtd
->dai
;
326 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
327 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
330 if (codec_dai
->symmetric_rates
|| cpu_dai
->symmetric_rates
||
331 machine
->symmetric_rates
) {
332 dev_dbg(card
->dev
, "Symmetry forces %dHz rate\n",
335 ret
= snd_pcm_hw_constraint_minmax(substream
->runtime
,
336 SNDRV_PCM_HW_PARAM_RATE
,
341 "Unable to apply rate symmetry constraint: %d\n", ret
);
350 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
351 * then initialized and any private data can be allocated. This also calls
352 * startup for the cpu DAI, platform, machine and codec DAI.
354 static int soc_pcm_open(struct snd_pcm_substream
*substream
)
356 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
357 struct snd_soc_device
*socdev
= rtd
->socdev
;
358 struct snd_soc_card
*card
= socdev
->card
;
359 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
360 struct snd_soc_dai_link
*machine
= rtd
->dai
;
361 struct snd_soc_platform
*platform
= card
->platform
;
362 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
363 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
366 mutex_lock(&pcm_mutex
);
368 /* startup the audio subsystem */
369 if (cpu_dai
->ops
->startup
) {
370 ret
= cpu_dai
->ops
->startup(substream
, cpu_dai
);
372 printk(KERN_ERR
"asoc: can't open interface %s\n",
378 if (platform
->pcm_ops
->open
) {
379 ret
= platform
->pcm_ops
->open(substream
);
381 printk(KERN_ERR
"asoc: can't open platform %s\n", platform
->name
);
386 if (codec_dai
->ops
->startup
) {
387 ret
= codec_dai
->ops
->startup(substream
, codec_dai
);
389 printk(KERN_ERR
"asoc: can't open codec %s\n",
395 if (machine
->ops
&& machine
->ops
->startup
) {
396 ret
= machine
->ops
->startup(substream
);
398 printk(KERN_ERR
"asoc: %s startup failed\n", machine
->name
);
403 /* Check that the codec and cpu DAI's are compatible */
404 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
405 runtime
->hw
.rate_min
=
406 max(codec_dai
->playback
.rate_min
,
407 cpu_dai
->playback
.rate_min
);
408 runtime
->hw
.rate_max
=
409 min(codec_dai
->playback
.rate_max
,
410 cpu_dai
->playback
.rate_max
);
411 runtime
->hw
.channels_min
=
412 max(codec_dai
->playback
.channels_min
,
413 cpu_dai
->playback
.channels_min
);
414 runtime
->hw
.channels_max
=
415 min(codec_dai
->playback
.channels_max
,
416 cpu_dai
->playback
.channels_max
);
417 runtime
->hw
.formats
=
418 codec_dai
->playback
.formats
& cpu_dai
->playback
.formats
;
420 codec_dai
->playback
.rates
& cpu_dai
->playback
.rates
;
421 if (codec_dai
->playback
.rates
422 & (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))
423 runtime
->hw
.rates
|= cpu_dai
->playback
.rates
;
424 if (cpu_dai
->playback
.rates
425 & (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))
426 runtime
->hw
.rates
|= codec_dai
->playback
.rates
;
428 runtime
->hw
.rate_min
=
429 max(codec_dai
->capture
.rate_min
,
430 cpu_dai
->capture
.rate_min
);
431 runtime
->hw
.rate_max
=
432 min(codec_dai
->capture
.rate_max
,
433 cpu_dai
->capture
.rate_max
);
434 runtime
->hw
.channels_min
=
435 max(codec_dai
->capture
.channels_min
,
436 cpu_dai
->capture
.channels_min
);
437 runtime
->hw
.channels_max
=
438 min(codec_dai
->capture
.channels_max
,
439 cpu_dai
->capture
.channels_max
);
440 runtime
->hw
.formats
=
441 codec_dai
->capture
.formats
& cpu_dai
->capture
.formats
;
443 codec_dai
->capture
.rates
& cpu_dai
->capture
.rates
;
444 if (codec_dai
->capture
.rates
445 & (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))
446 runtime
->hw
.rates
|= cpu_dai
->capture
.rates
;
447 if (cpu_dai
->capture
.rates
448 & (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))
449 runtime
->hw
.rates
|= codec_dai
->capture
.rates
;
452 snd_pcm_limit_hw_rates(runtime
);
453 if (!runtime
->hw
.rates
) {
454 printk(KERN_ERR
"asoc: %s <-> %s No matching rates\n",
455 codec_dai
->name
, cpu_dai
->name
);
458 if (!runtime
->hw
.formats
) {
459 printk(KERN_ERR
"asoc: %s <-> %s No matching formats\n",
460 codec_dai
->name
, cpu_dai
->name
);
463 if (!runtime
->hw
.channels_min
|| !runtime
->hw
.channels_max
) {
464 printk(KERN_ERR
"asoc: %s <-> %s No matching channels\n",
465 codec_dai
->name
, cpu_dai
->name
);
469 /* Symmetry only applies if we've already got an active stream. */
470 if (cpu_dai
->active
|| codec_dai
->active
) {
471 ret
= soc_pcm_apply_symmetry(substream
);
476 pr_debug("asoc: %s <-> %s info:\n", codec_dai
->name
, cpu_dai
->name
);
477 pr_debug("asoc: rate mask 0x%x\n", runtime
->hw
.rates
);
478 pr_debug("asoc: min ch %d max ch %d\n", runtime
->hw
.channels_min
,
479 runtime
->hw
.channels_max
);
480 pr_debug("asoc: min rate %d max rate %d\n", runtime
->hw
.rate_min
,
481 runtime
->hw
.rate_max
);
483 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
484 cpu_dai
->playback
.active
++;
485 codec_dai
->playback
.active
++;
487 cpu_dai
->capture
.active
++;
488 codec_dai
->capture
.active
++;
492 card
->codec
->active
++;
493 mutex_unlock(&pcm_mutex
);
497 if (machine
->ops
&& machine
->ops
->shutdown
)
498 machine
->ops
->shutdown(substream
);
501 if (codec_dai
->ops
->shutdown
)
502 codec_dai
->ops
->shutdown(substream
, codec_dai
);
505 if (platform
->pcm_ops
->close
)
506 platform
->pcm_ops
->close(substream
);
509 if (cpu_dai
->ops
->shutdown
)
510 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
512 mutex_unlock(&pcm_mutex
);
517 * Power down the audio subsystem pmdown_time msecs after close is called.
518 * This is to ensure there are no pops or clicks in between any music tracks
519 * due to DAPM power cycling.
521 static void close_delayed_work(struct work_struct
*work
)
523 struct snd_soc_card
*card
= container_of(work
, struct snd_soc_card
,
525 struct snd_soc_codec
*codec
= card
->codec
;
526 struct snd_soc_dai
*codec_dai
;
529 mutex_lock(&pcm_mutex
);
530 for (i
= 0; i
< codec
->num_dai
; i
++) {
531 codec_dai
= &codec
->dai
[i
];
533 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
534 codec_dai
->playback
.stream_name
,
535 codec_dai
->playback
.active
? "active" : "inactive",
536 codec_dai
->pop_wait
? "yes" : "no");
538 /* are we waiting on this codec DAI stream */
539 if (codec_dai
->pop_wait
== 1) {
540 codec_dai
->pop_wait
= 0;
541 snd_soc_dapm_stream_event(codec
,
542 codec_dai
->playback
.stream_name
,
543 SND_SOC_DAPM_STREAM_STOP
);
546 mutex_unlock(&pcm_mutex
);
550 * Called by ALSA when a PCM substream is closed. Private data can be
551 * freed here. The cpu DAI, codec DAI, machine and platform are also
554 static int soc_codec_close(struct snd_pcm_substream
*substream
)
556 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
557 struct snd_soc_device
*socdev
= rtd
->socdev
;
558 struct snd_soc_card
*card
= socdev
->card
;
559 struct snd_soc_dai_link
*machine
= rtd
->dai
;
560 struct snd_soc_platform
*platform
= card
->platform
;
561 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
562 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
563 struct snd_soc_codec
*codec
= card
->codec
;
565 mutex_lock(&pcm_mutex
);
567 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
568 cpu_dai
->playback
.active
--;
569 codec_dai
->playback
.active
--;
571 cpu_dai
->capture
.active
--;
572 codec_dai
->capture
.active
--;
579 /* Muting the DAC suppresses artifacts caused during digital
580 * shutdown, for example from stopping clocks.
582 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
583 snd_soc_dai_digital_mute(codec_dai
, 1);
585 if (cpu_dai
->ops
->shutdown
)
586 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
588 if (codec_dai
->ops
->shutdown
)
589 codec_dai
->ops
->shutdown(substream
, codec_dai
);
591 if (machine
->ops
&& machine
->ops
->shutdown
)
592 machine
->ops
->shutdown(substream
);
594 if (platform
->pcm_ops
->close
)
595 platform
->pcm_ops
->close(substream
);
597 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
598 /* start delayed pop wq here for playback streams */
599 codec_dai
->pop_wait
= 1;
600 schedule_delayed_work(&card
->delayed_work
,
601 msecs_to_jiffies(card
->pmdown_time
));
603 /* capture streams can be powered down now */
604 snd_soc_dapm_stream_event(codec
,
605 codec_dai
->capture
.stream_name
,
606 SND_SOC_DAPM_STREAM_STOP
);
609 mutex_unlock(&pcm_mutex
);
614 * Called by ALSA when the PCM substream is prepared, can set format, sample
615 * rate, etc. This function is non atomic and can be called multiple times,
616 * it can refer to the runtime info.
618 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
620 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
621 struct snd_soc_device
*socdev
= rtd
->socdev
;
622 struct snd_soc_card
*card
= socdev
->card
;
623 struct snd_soc_dai_link
*machine
= rtd
->dai
;
624 struct snd_soc_platform
*platform
= card
->platform
;
625 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
626 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
627 struct snd_soc_codec
*codec
= card
->codec
;
630 mutex_lock(&pcm_mutex
);
632 if (machine
->ops
&& machine
->ops
->prepare
) {
633 ret
= machine
->ops
->prepare(substream
);
635 printk(KERN_ERR
"asoc: machine prepare error\n");
640 if (platform
->pcm_ops
->prepare
) {
641 ret
= platform
->pcm_ops
->prepare(substream
);
643 printk(KERN_ERR
"asoc: platform prepare error\n");
648 if (codec_dai
->ops
->prepare
) {
649 ret
= codec_dai
->ops
->prepare(substream
, codec_dai
);
651 printk(KERN_ERR
"asoc: codec DAI prepare error\n");
656 if (cpu_dai
->ops
->prepare
) {
657 ret
= cpu_dai
->ops
->prepare(substream
, cpu_dai
);
659 printk(KERN_ERR
"asoc: cpu DAI prepare error\n");
664 /* cancel any delayed stream shutdown that is pending */
665 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
666 codec_dai
->pop_wait
) {
667 codec_dai
->pop_wait
= 0;
668 cancel_delayed_work(&card
->delayed_work
);
671 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
672 snd_soc_dapm_stream_event(codec
,
673 codec_dai
->playback
.stream_name
,
674 SND_SOC_DAPM_STREAM_START
);
676 snd_soc_dapm_stream_event(codec
,
677 codec_dai
->capture
.stream_name
,
678 SND_SOC_DAPM_STREAM_START
);
680 snd_soc_dai_digital_mute(codec_dai
, 0);
683 mutex_unlock(&pcm_mutex
);
688 * Called by ALSA when the hardware params are set by application. This
689 * function can also be called multiple times and can allocate buffers
690 * (using snd_pcm_lib_* ). It's non-atomic.
692 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
693 struct snd_pcm_hw_params
*params
)
695 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
696 struct snd_soc_device
*socdev
= rtd
->socdev
;
697 struct snd_soc_dai_link
*machine
= rtd
->dai
;
698 struct snd_soc_card
*card
= socdev
->card
;
699 struct snd_soc_platform
*platform
= card
->platform
;
700 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
701 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
704 mutex_lock(&pcm_mutex
);
706 if (machine
->ops
&& machine
->ops
->hw_params
) {
707 ret
= machine
->ops
->hw_params(substream
, params
);
709 printk(KERN_ERR
"asoc: machine hw_params failed\n");
714 if (codec_dai
->ops
->hw_params
) {
715 ret
= codec_dai
->ops
->hw_params(substream
, params
, codec_dai
);
717 printk(KERN_ERR
"asoc: can't set codec %s hw params\n",
723 if (cpu_dai
->ops
->hw_params
) {
724 ret
= cpu_dai
->ops
->hw_params(substream
, params
, cpu_dai
);
726 printk(KERN_ERR
"asoc: interface %s hw params failed\n",
732 if (platform
->pcm_ops
->hw_params
) {
733 ret
= platform
->pcm_ops
->hw_params(substream
, params
);
735 printk(KERN_ERR
"asoc: platform %s hw params failed\n",
741 machine
->rate
= params_rate(params
);
744 mutex_unlock(&pcm_mutex
);
748 if (cpu_dai
->ops
->hw_free
)
749 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
752 if (codec_dai
->ops
->hw_free
)
753 codec_dai
->ops
->hw_free(substream
, codec_dai
);
756 if (machine
->ops
&& machine
->ops
->hw_free
)
757 machine
->ops
->hw_free(substream
);
759 mutex_unlock(&pcm_mutex
);
764 * Free's resources allocated by hw_params, can be called multiple times
766 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
768 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
769 struct snd_soc_device
*socdev
= rtd
->socdev
;
770 struct snd_soc_dai_link
*machine
= rtd
->dai
;
771 struct snd_soc_card
*card
= socdev
->card
;
772 struct snd_soc_platform
*platform
= card
->platform
;
773 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
774 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
775 struct snd_soc_codec
*codec
= card
->codec
;
777 mutex_lock(&pcm_mutex
);
779 /* apply codec digital mute */
781 snd_soc_dai_digital_mute(codec_dai
, 1);
783 /* free any machine hw params */
784 if (machine
->ops
&& machine
->ops
->hw_free
)
785 machine
->ops
->hw_free(substream
);
787 /* free any DMA resources */
788 if (platform
->pcm_ops
->hw_free
)
789 platform
->pcm_ops
->hw_free(substream
);
791 /* now free hw params for the DAI's */
792 if (codec_dai
->ops
->hw_free
)
793 codec_dai
->ops
->hw_free(substream
, codec_dai
);
795 if (cpu_dai
->ops
->hw_free
)
796 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
798 mutex_unlock(&pcm_mutex
);
802 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
804 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
805 struct snd_soc_device
*socdev
= rtd
->socdev
;
806 struct snd_soc_card
*card
= socdev
->card
;
807 struct snd_soc_dai_link
*machine
= rtd
->dai
;
808 struct snd_soc_platform
*platform
= card
->platform
;
809 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
810 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
813 if (codec_dai
->ops
->trigger
) {
814 ret
= codec_dai
->ops
->trigger(substream
, cmd
, codec_dai
);
819 if (platform
->pcm_ops
->trigger
) {
820 ret
= platform
->pcm_ops
->trigger(substream
, cmd
);
825 if (cpu_dai
->ops
->trigger
) {
826 ret
= cpu_dai
->ops
->trigger(substream
, cmd
, cpu_dai
);
834 * soc level wrapper for pointer callback
835 * If cpu_dai, codec_dai, platform driver has the delay callback, than
836 * the runtime->delay will be updated accordingly.
838 static snd_pcm_uframes_t
soc_pcm_pointer(struct snd_pcm_substream
*substream
)
840 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
841 struct snd_soc_device
*socdev
= rtd
->socdev
;
842 struct snd_soc_card
*card
= socdev
->card
;
843 struct snd_soc_platform
*platform
= card
->platform
;
844 struct snd_soc_dai_link
*machine
= rtd
->dai
;
845 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
846 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
847 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
848 snd_pcm_uframes_t offset
= 0;
849 snd_pcm_sframes_t delay
= 0;
851 if (platform
->pcm_ops
->pointer
)
852 offset
= platform
->pcm_ops
->pointer(substream
);
854 if (cpu_dai
->ops
->delay
)
855 delay
+= cpu_dai
->ops
->delay(substream
, cpu_dai
);
857 if (codec_dai
->ops
->delay
)
858 delay
+= codec_dai
->ops
->delay(substream
, codec_dai
);
861 delay
+= platform
->delay(substream
, codec_dai
);
863 runtime
->delay
= delay
;
868 /* ASoC PCM operations */
869 static struct snd_pcm_ops soc_pcm_ops
= {
870 .open
= soc_pcm_open
,
871 .close
= soc_codec_close
,
872 .hw_params
= soc_pcm_hw_params
,
873 .hw_free
= soc_pcm_hw_free
,
874 .prepare
= soc_pcm_prepare
,
875 .trigger
= soc_pcm_trigger
,
876 .pointer
= soc_pcm_pointer
,
880 /* powers down audio subsystem for suspend */
881 static int soc_suspend(struct device
*dev
)
883 struct platform_device
*pdev
= to_platform_device(dev
);
884 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
885 struct snd_soc_card
*card
= socdev
->card
;
886 struct snd_soc_platform
*platform
= card
->platform
;
887 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
888 struct snd_soc_codec
*codec
= card
->codec
;
891 /* If the initialization of this soc device failed, there is no codec
892 * associated with it. Just bail out in this case.
897 /* Due to the resume being scheduled into a workqueue we could
898 * suspend before that's finished - wait for it to complete.
900 snd_power_lock(codec
->card
);
901 snd_power_wait(codec
->card
, SNDRV_CTL_POWER_D0
);
902 snd_power_unlock(codec
->card
);
904 /* we're going to block userspace touching us until resume completes */
905 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D3hot
);
907 /* mute any active DAC's */
908 for (i
= 0; i
< card
->num_links
; i
++) {
909 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
911 if (card
->dai_link
[i
].ignore_suspend
)
914 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
915 dai
->ops
->digital_mute(dai
, 1);
918 /* suspend all pcms */
919 for (i
= 0; i
< card
->num_links
; i
++) {
920 if (card
->dai_link
[i
].ignore_suspend
)
923 snd_pcm_suspend_all(card
->dai_link
[i
].pcm
);
926 if (card
->suspend_pre
)
927 card
->suspend_pre(pdev
, PMSG_SUSPEND
);
929 for (i
= 0; i
< card
->num_links
; i
++) {
930 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
932 if (card
->dai_link
[i
].ignore_suspend
)
935 if (cpu_dai
->suspend
&& !cpu_dai
->ac97_control
)
936 cpu_dai
->suspend(cpu_dai
);
937 if (platform
->suspend
)
938 platform
->suspend(&card
->dai_link
[i
]);
941 /* close any waiting streams and save state */
942 run_delayed_work(&card
->delayed_work
);
943 codec
->suspend_bias_level
= codec
->bias_level
;
945 for (i
= 0; i
< codec
->num_dai
; i
++) {
946 char *stream
= codec
->dai
[i
].playback
.stream_name
;
948 if (card
->dai_link
[i
].ignore_suspend
)
952 snd_soc_dapm_stream_event(codec
, stream
,
953 SND_SOC_DAPM_STREAM_SUSPEND
);
954 stream
= codec
->dai
[i
].capture
.stream_name
;
956 snd_soc_dapm_stream_event(codec
, stream
,
957 SND_SOC_DAPM_STREAM_SUSPEND
);
960 /* If there are paths active then the CODEC will be held with
961 * bias _ON and should not be suspended. */
962 if (codec_dev
->suspend
) {
963 switch (codec
->bias_level
) {
964 case SND_SOC_BIAS_STANDBY
:
965 case SND_SOC_BIAS_OFF
:
966 codec_dev
->suspend(pdev
, PMSG_SUSPEND
);
969 dev_dbg(socdev
->dev
, "CODEC is on over suspend\n");
974 for (i
= 0; i
< card
->num_links
; i
++) {
975 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
977 if (card
->dai_link
[i
].ignore_suspend
)
980 if (cpu_dai
->suspend
&& cpu_dai
->ac97_control
)
981 cpu_dai
->suspend(cpu_dai
);
984 if (card
->suspend_post
)
985 card
->suspend_post(pdev
, PMSG_SUSPEND
);
990 /* deferred resume work, so resume can complete before we finished
991 * setting our codec back up, which can be very slow on I2C
993 static void soc_resume_deferred(struct work_struct
*work
)
995 struct snd_soc_card
*card
= container_of(work
,
997 deferred_resume_work
);
998 struct snd_soc_device
*socdev
= card
->socdev
;
999 struct snd_soc_platform
*platform
= card
->platform
;
1000 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
1001 struct snd_soc_codec
*codec
= card
->codec
;
1002 struct platform_device
*pdev
= to_platform_device(socdev
->dev
);
1005 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1006 * so userspace apps are blocked from touching us
1009 dev_dbg(socdev
->dev
, "starting resume work\n");
1011 /* Bring us up into D2 so that DAPM starts enabling things */
1012 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D2
);
1014 if (card
->resume_pre
)
1015 card
->resume_pre(pdev
);
1017 for (i
= 0; i
< card
->num_links
; i
++) {
1018 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1020 if (card
->dai_link
[i
].ignore_suspend
)
1023 if (cpu_dai
->resume
&& cpu_dai
->ac97_control
)
1024 cpu_dai
->resume(cpu_dai
);
1027 /* If the CODEC was idle over suspend then it will have been
1028 * left with bias OFF or STANDBY and suspended so we must now
1029 * resume. Otherwise the suspend was suppressed.
1031 if (codec_dev
->resume
) {
1032 switch (codec
->bias_level
) {
1033 case SND_SOC_BIAS_STANDBY
:
1034 case SND_SOC_BIAS_OFF
:
1035 codec_dev
->resume(pdev
);
1038 dev_dbg(socdev
->dev
, "CODEC was on over suspend\n");
1043 for (i
= 0; i
< codec
->num_dai
; i
++) {
1044 char *stream
= codec
->dai
[i
].playback
.stream_name
;
1046 if (card
->dai_link
[i
].ignore_suspend
)
1050 snd_soc_dapm_stream_event(codec
, stream
,
1051 SND_SOC_DAPM_STREAM_RESUME
);
1052 stream
= codec
->dai
[i
].capture
.stream_name
;
1054 snd_soc_dapm_stream_event(codec
, stream
,
1055 SND_SOC_DAPM_STREAM_RESUME
);
1058 /* unmute any active DACs */
1059 for (i
= 0; i
< card
->num_links
; i
++) {
1060 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
1062 if (card
->dai_link
[i
].ignore_suspend
)
1065 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
1066 dai
->ops
->digital_mute(dai
, 0);
1069 for (i
= 0; i
< card
->num_links
; i
++) {
1070 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1072 if (card
->dai_link
[i
].ignore_suspend
)
1075 if (cpu_dai
->resume
&& !cpu_dai
->ac97_control
)
1076 cpu_dai
->resume(cpu_dai
);
1077 if (platform
->resume
)
1078 platform
->resume(&card
->dai_link
[i
]);
1081 if (card
->resume_post
)
1082 card
->resume_post(pdev
);
1084 dev_dbg(socdev
->dev
, "resume work completed\n");
1086 /* userspace can access us now we are back as we were before */
1087 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D0
);
1090 /* powers up audio subsystem after a suspend */
1091 static int soc_resume(struct device
*dev
)
1093 struct platform_device
*pdev
= to_platform_device(dev
);
1094 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1095 struct snd_soc_card
*card
= socdev
->card
;
1096 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[0].cpu_dai
;
1098 /* If the initialization of this soc device failed, there is no codec
1099 * associated with it. Just bail out in this case.
1104 /* AC97 devices might have other drivers hanging off them so
1105 * need to resume immediately. Other drivers don't have that
1106 * problem and may take a substantial amount of time to resume
1107 * due to I/O costs and anti-pop so handle them out of line.
1109 if (cpu_dai
->ac97_control
) {
1110 dev_dbg(socdev
->dev
, "Resuming AC97 immediately\n");
1111 soc_resume_deferred(&card
->deferred_resume_work
);
1113 dev_dbg(socdev
->dev
, "Scheduling resume work\n");
1114 if (!schedule_work(&card
->deferred_resume_work
))
1115 dev_err(socdev
->dev
, "resume work item may be lost\n");
1121 #define soc_suspend NULL
1122 #define soc_resume NULL
1125 static struct snd_soc_dai_ops null_dai_ops
= {
1128 static void snd_soc_instantiate_card(struct snd_soc_card
*card
)
1130 struct platform_device
*pdev
= container_of(card
->dev
,
1131 struct platform_device
,
1133 struct snd_soc_codec_device
*codec_dev
= card
->socdev
->codec_dev
;
1134 struct snd_soc_codec
*codec
;
1135 struct snd_soc_platform
*platform
;
1136 struct snd_soc_dai
*dai
;
1137 int i
, found
, ret
, ac97
;
1139 if (card
->instantiated
)
1143 list_for_each_entry(platform
, &platform_list
, list
)
1144 if (card
->platform
== platform
) {
1149 dev_dbg(card
->dev
, "Platform %s not registered\n",
1150 card
->platform
->name
);
1155 for (i
= 0; i
< card
->num_links
; i
++) {
1157 list_for_each_entry(dai
, &dai_list
, list
)
1158 if (card
->dai_link
[i
].cpu_dai
== dai
) {
1163 dev_dbg(card
->dev
, "DAI %s not registered\n",
1164 card
->dai_link
[i
].cpu_dai
->name
);
1168 if (card
->dai_link
[i
].cpu_dai
->ac97_control
)
1172 for (i
= 0; i
< card
->num_links
; i
++) {
1173 if (!card
->dai_link
[i
].codec_dai
->ops
)
1174 card
->dai_link
[i
].codec_dai
->ops
= &null_dai_ops
;
1177 /* If we have AC97 in the system then don't wait for the
1178 * codec. This will need revisiting if we have to handle
1179 * systems with mixed AC97 and non-AC97 parts. Only check for
1180 * DAIs currently; we can't do this per link since some AC97
1181 * codecs have non-AC97 DAIs.
1184 for (i
= 0; i
< card
->num_links
; i
++) {
1186 list_for_each_entry(dai
, &dai_list
, list
)
1187 if (card
->dai_link
[i
].codec_dai
== dai
) {
1192 dev_dbg(card
->dev
, "DAI %s not registered\n",
1193 card
->dai_link
[i
].codec_dai
->name
);
1198 /* Note that we do not current check for codec components */
1200 dev_dbg(card
->dev
, "All components present, instantiating\n");
1202 /* Found everything, bring it up */
1203 card
->pmdown_time
= pmdown_time
;
1206 ret
= card
->probe(pdev
);
1211 for (i
= 0; i
< card
->num_links
; i
++) {
1212 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1213 if (cpu_dai
->probe
) {
1214 ret
= cpu_dai
->probe(pdev
, cpu_dai
);
1220 if (codec_dev
->probe
) {
1221 ret
= codec_dev
->probe(pdev
);
1225 codec
= card
->codec
;
1227 if (platform
->probe
) {
1228 ret
= platform
->probe(pdev
);
1233 /* DAPM stream work */
1234 INIT_DELAYED_WORK(&card
->delayed_work
, close_delayed_work
);
1236 /* deferred resume work */
1237 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
1240 for (i
= 0; i
< card
->num_links
; i
++) {
1241 if (card
->dai_link
[i
].init
) {
1242 ret
= card
->dai_link
[i
].init(codec
);
1244 printk(KERN_ERR
"asoc: failed to init %s\n",
1245 card
->dai_link
[i
].stream_name
);
1249 if (card
->dai_link
[i
].codec_dai
->ac97_control
)
1253 snprintf(codec
->card
->shortname
, sizeof(codec
->card
->shortname
),
1255 snprintf(codec
->card
->longname
, sizeof(codec
->card
->longname
),
1256 "%s (%s)", card
->name
, codec
->name
);
1258 /* Make sure all DAPM widgets are instantiated */
1259 snd_soc_dapm_new_widgets(codec
);
1261 ret
= snd_card_register(codec
->card
);
1263 printk(KERN_ERR
"asoc: failed to register soundcard for %s\n",
1268 mutex_lock(&codec
->mutex
);
1269 #ifdef CONFIG_SND_SOC_AC97_BUS
1270 /* Only instantiate AC97 if not already done by the adaptor
1271 * for the generic AC97 subsystem.
1273 if (ac97
&& strcmp(codec
->name
, "AC97") != 0) {
1274 ret
= soc_ac97_dev_register(codec
);
1276 printk(KERN_ERR
"asoc: AC97 device register failed\n");
1277 snd_card_free(codec
->card
);
1278 mutex_unlock(&codec
->mutex
);
1284 ret
= snd_soc_dapm_sys_add(card
->socdev
->dev
);
1286 printk(KERN_WARNING
"asoc: failed to add dapm sysfs entries\n");
1288 ret
= device_create_file(card
->socdev
->dev
, &dev_attr_pmdown_time
);
1290 printk(KERN_WARNING
"asoc: failed to add pmdown_time sysfs\n");
1292 ret
= device_create_file(card
->socdev
->dev
, &dev_attr_codec_reg
);
1294 printk(KERN_WARNING
"asoc: failed to add codec sysfs files\n");
1296 soc_init_codec_debugfs(codec
);
1297 mutex_unlock(&codec
->mutex
);
1299 card
->instantiated
= 1;
1304 if (platform
->remove
)
1305 platform
->remove(pdev
);
1308 if (codec_dev
->remove
)
1309 codec_dev
->remove(pdev
);
1312 for (i
--; i
>= 0; i
--) {
1313 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1314 if (cpu_dai
->remove
)
1315 cpu_dai
->remove(pdev
, cpu_dai
);
1323 * Attempt to initialise any uninitialised cards. Must be called with
1326 static void snd_soc_instantiate_cards(void)
1328 struct snd_soc_card
*card
;
1329 list_for_each_entry(card
, &card_list
, list
)
1330 snd_soc_instantiate_card(card
);
1333 /* probes a new socdev */
1334 static int soc_probe(struct platform_device
*pdev
)
1337 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1338 struct snd_soc_card
*card
= socdev
->card
;
1340 /* Bodge while we push things out of socdev */
1341 card
->socdev
= socdev
;
1343 /* Bodge while we unpick instantiation */
1344 card
->dev
= &pdev
->dev
;
1345 ret
= snd_soc_register_card(card
);
1347 dev_err(&pdev
->dev
, "Failed to register card\n");
1354 /* removes a socdev */
1355 static int soc_remove(struct platform_device
*pdev
)
1358 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1359 struct snd_soc_card
*card
= socdev
->card
;
1360 struct snd_soc_platform
*platform
= card
->platform
;
1361 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
1363 if (card
->instantiated
) {
1364 run_delayed_work(&card
->delayed_work
);
1366 if (platform
->remove
)
1367 platform
->remove(pdev
);
1369 if (codec_dev
->remove
)
1370 codec_dev
->remove(pdev
);
1372 for (i
= 0; i
< card
->num_links
; i
++) {
1373 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1374 if (cpu_dai
->remove
)
1375 cpu_dai
->remove(pdev
, cpu_dai
);
1382 snd_soc_unregister_card(card
);
1387 static int soc_poweroff(struct device
*dev
)
1389 struct platform_device
*pdev
= to_platform_device(dev
);
1390 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1391 struct snd_soc_card
*card
= socdev
->card
;
1393 if (!card
->instantiated
)
1396 /* Flush out pmdown_time work - we actually do want to run it
1397 * now, we're shutting down so no imminent restart. */
1398 run_delayed_work(&card
->delayed_work
);
1400 snd_soc_dapm_shutdown(socdev
);
1405 static const struct dev_pm_ops soc_pm_ops
= {
1406 .suspend
= soc_suspend
,
1407 .resume
= soc_resume
,
1408 .poweroff
= soc_poweroff
,
1411 /* ASoC platform driver */
1412 static struct platform_driver soc_driver
= {
1414 .name
= "soc-audio",
1415 .owner
= THIS_MODULE
,
1419 .remove
= soc_remove
,
1422 /* create a new pcm */
1423 static int soc_new_pcm(struct snd_soc_device
*socdev
,
1424 struct snd_soc_dai_link
*dai_link
, int num
)
1426 struct snd_soc_card
*card
= socdev
->card
;
1427 struct snd_soc_codec
*codec
= card
->codec
;
1428 struct snd_soc_platform
*platform
= card
->platform
;
1429 struct snd_soc_dai
*codec_dai
= dai_link
->codec_dai
;
1430 struct snd_soc_dai
*cpu_dai
= dai_link
->cpu_dai
;
1431 struct snd_soc_pcm_runtime
*rtd
;
1432 struct snd_pcm
*pcm
;
1434 int ret
= 0, playback
= 0, capture
= 0;
1436 rtd
= kzalloc(sizeof(struct snd_soc_pcm_runtime
), GFP_KERNEL
);
1440 rtd
->dai
= dai_link
;
1441 rtd
->socdev
= socdev
;
1442 codec_dai
->codec
= card
->codec
;
1444 /* check client and interface hw capabilities */
1445 snprintf(new_name
, sizeof(new_name
), "%s %s-%d",
1446 dai_link
->stream_name
, codec_dai
->name
, num
);
1448 if (codec_dai
->playback
.channels_min
)
1450 if (codec_dai
->capture
.channels_min
)
1453 ret
= snd_pcm_new(codec
->card
, new_name
, codec
->pcm_devs
++, playback
,
1456 printk(KERN_ERR
"asoc: can't create pcm for codec %s\n",
1462 dai_link
->pcm
= pcm
;
1463 pcm
->private_data
= rtd
;
1464 soc_pcm_ops
.mmap
= platform
->pcm_ops
->mmap
;
1465 soc_pcm_ops
.ioctl
= platform
->pcm_ops
->ioctl
;
1466 soc_pcm_ops
.copy
= platform
->pcm_ops
->copy
;
1467 soc_pcm_ops
.silence
= platform
->pcm_ops
->silence
;
1468 soc_pcm_ops
.ack
= platform
->pcm_ops
->ack
;
1469 soc_pcm_ops
.page
= platform
->pcm_ops
->page
;
1472 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &soc_pcm_ops
);
1475 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &soc_pcm_ops
);
1477 ret
= platform
->pcm_new(codec
->card
, codec_dai
, pcm
);
1479 printk(KERN_ERR
"asoc: platform pcm constructor failed\n");
1484 pcm
->private_free
= platform
->pcm_free
;
1485 printk(KERN_INFO
"asoc: %s <-> %s mapping ok\n", codec_dai
->name
,
1491 * snd_soc_codec_volatile_register: Report if a register is volatile.
1493 * @codec: CODEC to query.
1494 * @reg: Register to query.
1496 * Boolean function indiciating if a CODEC register is volatile.
1498 int snd_soc_codec_volatile_register(struct snd_soc_codec
*codec
, int reg
)
1500 if (codec
->volatile_register
)
1501 return codec
->volatile_register(reg
);
1505 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register
);
1508 * snd_soc_new_ac97_codec - initailise AC97 device
1509 * @codec: audio codec
1510 * @ops: AC97 bus operations
1511 * @num: AC97 codec number
1513 * Initialises AC97 codec resources for use by ad-hoc devices only.
1515 int snd_soc_new_ac97_codec(struct snd_soc_codec
*codec
,
1516 struct snd_ac97_bus_ops
*ops
, int num
)
1518 mutex_lock(&codec
->mutex
);
1520 codec
->ac97
= kzalloc(sizeof(struct snd_ac97
), GFP_KERNEL
);
1521 if (codec
->ac97
== NULL
) {
1522 mutex_unlock(&codec
->mutex
);
1526 codec
->ac97
->bus
= kzalloc(sizeof(struct snd_ac97_bus
), GFP_KERNEL
);
1527 if (codec
->ac97
->bus
== NULL
) {
1530 mutex_unlock(&codec
->mutex
);
1534 codec
->ac97
->bus
->ops
= ops
;
1535 codec
->ac97
->num
= num
;
1536 codec
->dev
= &codec
->ac97
->dev
;
1537 mutex_unlock(&codec
->mutex
);
1540 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec
);
1543 * snd_soc_free_ac97_codec - free AC97 codec device
1544 * @codec: audio codec
1546 * Frees AC97 codec device resources.
1548 void snd_soc_free_ac97_codec(struct snd_soc_codec
*codec
)
1550 mutex_lock(&codec
->mutex
);
1551 kfree(codec
->ac97
->bus
);
1554 mutex_unlock(&codec
->mutex
);
1556 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec
);
1559 * snd_soc_update_bits - update codec register bits
1560 * @codec: audio codec
1561 * @reg: codec register
1562 * @mask: register mask
1565 * Writes new register value.
1567 * Returns 1 for change else 0.
1569 int snd_soc_update_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1570 unsigned int mask
, unsigned int value
)
1573 unsigned int old
, new;
1575 old
= snd_soc_read(codec
, reg
);
1576 new = (old
& ~mask
) | value
;
1577 change
= old
!= new;
1579 snd_soc_write(codec
, reg
, new);
1583 EXPORT_SYMBOL_GPL(snd_soc_update_bits
);
1586 * snd_soc_update_bits_locked - update codec register bits
1587 * @codec: audio codec
1588 * @reg: codec register
1589 * @mask: register mask
1592 * Writes new register value, and takes the codec mutex.
1594 * Returns 1 for change else 0.
1596 int snd_soc_update_bits_locked(struct snd_soc_codec
*codec
,
1597 unsigned short reg
, unsigned int mask
,
1602 mutex_lock(&codec
->mutex
);
1603 change
= snd_soc_update_bits(codec
, reg
, mask
, value
);
1604 mutex_unlock(&codec
->mutex
);
1608 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked
);
1611 * snd_soc_test_bits - test register for change
1612 * @codec: audio codec
1613 * @reg: codec register
1614 * @mask: register mask
1617 * Tests a register with a new value and checks if the new value is
1618 * different from the old value.
1620 * Returns 1 for change else 0.
1622 int snd_soc_test_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1623 unsigned int mask
, unsigned int value
)
1626 unsigned int old
, new;
1628 old
= snd_soc_read(codec
, reg
);
1629 new = (old
& ~mask
) | value
;
1630 change
= old
!= new;
1634 EXPORT_SYMBOL_GPL(snd_soc_test_bits
);
1637 * snd_soc_new_pcms - create new sound card and pcms
1638 * @socdev: the SoC audio device
1639 * @idx: ALSA card index
1640 * @xid: card identification
1642 * Create a new sound card based upon the codec and interface pcms.
1644 * Returns 0 for success, else error.
1646 int snd_soc_new_pcms(struct snd_soc_device
*socdev
, int idx
, const char *xid
)
1648 struct snd_soc_card
*card
= socdev
->card
;
1649 struct snd_soc_codec
*codec
= card
->codec
;
1652 mutex_lock(&codec
->mutex
);
1654 /* register a sound card */
1655 ret
= snd_card_create(idx
, xid
, codec
->owner
, 0, &codec
->card
);
1657 printk(KERN_ERR
"asoc: can't create sound card for codec %s\n",
1659 mutex_unlock(&codec
->mutex
);
1663 codec
->socdev
= socdev
;
1664 codec
->card
->dev
= socdev
->dev
;
1665 codec
->card
->private_data
= codec
;
1666 strncpy(codec
->card
->driver
, codec
->name
, sizeof(codec
->card
->driver
));
1668 /* create the pcms */
1669 for (i
= 0; i
< card
->num_links
; i
++) {
1670 ret
= soc_new_pcm(socdev
, &card
->dai_link
[i
], i
);
1672 printk(KERN_ERR
"asoc: can't create pcm %s\n",
1673 card
->dai_link
[i
].stream_name
);
1674 mutex_unlock(&codec
->mutex
);
1677 /* Check for codec->ac97 to handle the ac97.c fun */
1678 if (card
->dai_link
[i
].codec_dai
->ac97_control
&& codec
->ac97
) {
1679 snd_ac97_dev_add_pdata(codec
->ac97
,
1680 card
->dai_link
[i
].cpu_dai
->ac97_pdata
);
1684 mutex_unlock(&codec
->mutex
);
1687 EXPORT_SYMBOL_GPL(snd_soc_new_pcms
);
1690 * snd_soc_free_pcms - free sound card and pcms
1691 * @socdev: the SoC audio device
1693 * Frees sound card and pcms associated with the socdev.
1694 * Also unregister the codec if it is an AC97 device.
1696 void snd_soc_free_pcms(struct snd_soc_device
*socdev
)
1698 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1699 #ifdef CONFIG_SND_SOC_AC97_BUS
1700 struct snd_soc_dai
*codec_dai
;
1704 mutex_lock(&codec
->mutex
);
1705 soc_cleanup_codec_debugfs(codec
);
1706 #ifdef CONFIG_SND_SOC_AC97_BUS
1707 for (i
= 0; i
< codec
->num_dai
; i
++) {
1708 codec_dai
= &codec
->dai
[i
];
1709 if (codec_dai
->ac97_control
&& codec
->ac97
&&
1710 strcmp(codec
->name
, "AC97") != 0) {
1711 soc_ac97_dev_unregister(codec
);
1719 snd_card_free(codec
->card
);
1720 device_remove_file(socdev
->dev
, &dev_attr_codec_reg
);
1721 mutex_unlock(&codec
->mutex
);
1723 EXPORT_SYMBOL_GPL(snd_soc_free_pcms
);
1726 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1727 * @substream: the pcm substream
1728 * @hw: the hardware parameters
1730 * Sets the substream runtime hardware parameters.
1732 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
1733 const struct snd_pcm_hardware
*hw
)
1735 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1736 runtime
->hw
.info
= hw
->info
;
1737 runtime
->hw
.formats
= hw
->formats
;
1738 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
1739 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
1740 runtime
->hw
.periods_min
= hw
->periods_min
;
1741 runtime
->hw
.periods_max
= hw
->periods_max
;
1742 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
1743 runtime
->hw
.fifo_size
= hw
->fifo_size
;
1746 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
1749 * snd_soc_cnew - create new control
1750 * @_template: control template
1751 * @data: control private data
1752 * @long_name: control long name
1754 * Create a new mixer control from a template control.
1756 * Returns 0 for success, else error.
1758 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
1759 void *data
, char *long_name
)
1761 struct snd_kcontrol_new
template;
1763 memcpy(&template, _template
, sizeof(template));
1765 template.name
= long_name
;
1768 return snd_ctl_new1(&template, data
);
1770 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
1773 * snd_soc_add_controls - add an array of controls to a codec.
1774 * Convienience function to add a list of controls. Many codecs were
1775 * duplicating this code.
1777 * @codec: codec to add controls to
1778 * @controls: array of controls to add
1779 * @num_controls: number of elements in the array
1781 * Return 0 for success, else error.
1783 int snd_soc_add_controls(struct snd_soc_codec
*codec
,
1784 const struct snd_kcontrol_new
*controls
, int num_controls
)
1786 struct snd_card
*card
= codec
->card
;
1789 for (i
= 0; i
< num_controls
; i
++) {
1790 const struct snd_kcontrol_new
*control
= &controls
[i
];
1791 err
= snd_ctl_add(card
, snd_soc_cnew(control
, codec
, NULL
));
1793 dev_err(codec
->dev
, "%s: Failed to add %s\n",
1794 codec
->name
, control
->name
);
1801 EXPORT_SYMBOL_GPL(snd_soc_add_controls
);
1804 * snd_soc_info_enum_double - enumerated double mixer info callback
1805 * @kcontrol: mixer control
1806 * @uinfo: control element information
1808 * Callback to provide information about a double enumerated
1811 * Returns 0 for success.
1813 int snd_soc_info_enum_double(struct snd_kcontrol
*kcontrol
,
1814 struct snd_ctl_elem_info
*uinfo
)
1816 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1818 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1819 uinfo
->count
= e
->shift_l
== e
->shift_r
? 1 : 2;
1820 uinfo
->value
.enumerated
.items
= e
->max
;
1822 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1823 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1824 strcpy(uinfo
->value
.enumerated
.name
,
1825 e
->texts
[uinfo
->value
.enumerated
.item
]);
1828 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double
);
1831 * snd_soc_get_enum_double - enumerated double mixer get callback
1832 * @kcontrol: mixer control
1833 * @ucontrol: control element information
1835 * Callback to get the value of a double enumerated mixer.
1837 * Returns 0 for success.
1839 int snd_soc_get_enum_double(struct snd_kcontrol
*kcontrol
,
1840 struct snd_ctl_elem_value
*ucontrol
)
1842 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1843 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1844 unsigned int val
, bitmask
;
1846 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1848 val
= snd_soc_read(codec
, e
->reg
);
1849 ucontrol
->value
.enumerated
.item
[0]
1850 = (val
>> e
->shift_l
) & (bitmask
- 1);
1851 if (e
->shift_l
!= e
->shift_r
)
1852 ucontrol
->value
.enumerated
.item
[1] =
1853 (val
>> e
->shift_r
) & (bitmask
- 1);
1857 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double
);
1860 * snd_soc_put_enum_double - enumerated double mixer put callback
1861 * @kcontrol: mixer control
1862 * @ucontrol: control element information
1864 * Callback to set the value of a double enumerated mixer.
1866 * Returns 0 for success.
1868 int snd_soc_put_enum_double(struct snd_kcontrol
*kcontrol
,
1869 struct snd_ctl_elem_value
*ucontrol
)
1871 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1872 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1874 unsigned int mask
, bitmask
;
1876 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1878 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1880 val
= ucontrol
->value
.enumerated
.item
[0] << e
->shift_l
;
1881 mask
= (bitmask
- 1) << e
->shift_l
;
1882 if (e
->shift_l
!= e
->shift_r
) {
1883 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1885 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1886 mask
|= (bitmask
- 1) << e
->shift_r
;
1889 return snd_soc_update_bits_locked(codec
, e
->reg
, mask
, val
);
1891 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double
);
1894 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1895 * @kcontrol: mixer control
1896 * @ucontrol: control element information
1898 * Callback to get the value of a double semi enumerated mixer.
1900 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1901 * used for handling bitfield coded enumeration for example.
1903 * Returns 0 for success.
1905 int snd_soc_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1906 struct snd_ctl_elem_value
*ucontrol
)
1908 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1909 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1910 unsigned int reg_val
, val
, mux
;
1912 reg_val
= snd_soc_read(codec
, e
->reg
);
1913 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1914 for (mux
= 0; mux
< e
->max
; mux
++) {
1915 if (val
== e
->values
[mux
])
1918 ucontrol
->value
.enumerated
.item
[0] = mux
;
1919 if (e
->shift_l
!= e
->shift_r
) {
1920 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1921 for (mux
= 0; mux
< e
->max
; mux
++) {
1922 if (val
== e
->values
[mux
])
1925 ucontrol
->value
.enumerated
.item
[1] = mux
;
1930 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double
);
1933 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1934 * @kcontrol: mixer control
1935 * @ucontrol: control element information
1937 * Callback to set the value of a double semi enumerated mixer.
1939 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1940 * used for handling bitfield coded enumeration for example.
1942 * Returns 0 for success.
1944 int snd_soc_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1945 struct snd_ctl_elem_value
*ucontrol
)
1947 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1948 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1952 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1954 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1955 mask
= e
->mask
<< e
->shift_l
;
1956 if (e
->shift_l
!= e
->shift_r
) {
1957 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1959 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1960 mask
|= e
->mask
<< e
->shift_r
;
1963 return snd_soc_update_bits_locked(codec
, e
->reg
, mask
, val
);
1965 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double
);
1968 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1969 * @kcontrol: mixer control
1970 * @uinfo: control element information
1972 * Callback to provide information about an external enumerated
1975 * Returns 0 for success.
1977 int snd_soc_info_enum_ext(struct snd_kcontrol
*kcontrol
,
1978 struct snd_ctl_elem_info
*uinfo
)
1980 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1982 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1984 uinfo
->value
.enumerated
.items
= e
->max
;
1986 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1987 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1988 strcpy(uinfo
->value
.enumerated
.name
,
1989 e
->texts
[uinfo
->value
.enumerated
.item
]);
1992 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext
);
1995 * snd_soc_info_volsw_ext - external single mixer info callback
1996 * @kcontrol: mixer control
1997 * @uinfo: control element information
1999 * Callback to provide information about a single external mixer control.
2001 * Returns 0 for success.
2003 int snd_soc_info_volsw_ext(struct snd_kcontrol
*kcontrol
,
2004 struct snd_ctl_elem_info
*uinfo
)
2006 int max
= kcontrol
->private_value
;
2008 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
2009 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2011 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2014 uinfo
->value
.integer
.min
= 0;
2015 uinfo
->value
.integer
.max
= max
;
2018 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext
);
2021 * snd_soc_info_volsw - single mixer info callback
2022 * @kcontrol: mixer control
2023 * @uinfo: control element information
2025 * Callback to provide information about a single mixer control.
2027 * Returns 0 for success.
2029 int snd_soc_info_volsw(struct snd_kcontrol
*kcontrol
,
2030 struct snd_ctl_elem_info
*uinfo
)
2032 struct soc_mixer_control
*mc
=
2033 (struct soc_mixer_control
*)kcontrol
->private_value
;
2035 unsigned int shift
= mc
->shift
;
2036 unsigned int rshift
= mc
->rshift
;
2038 if (!mc
->platform_max
)
2039 mc
->platform_max
= mc
->max
;
2040 platform_max
= mc
->platform_max
;
2042 if (platform_max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
2043 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2045 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2047 uinfo
->count
= shift
== rshift
? 1 : 2;
2048 uinfo
->value
.integer
.min
= 0;
2049 uinfo
->value
.integer
.max
= platform_max
;
2052 EXPORT_SYMBOL_GPL(snd_soc_info_volsw
);
2055 * snd_soc_get_volsw - single mixer get callback
2056 * @kcontrol: mixer control
2057 * @ucontrol: control element information
2059 * Callback to get the value of a single mixer control.
2061 * Returns 0 for success.
2063 int snd_soc_get_volsw(struct snd_kcontrol
*kcontrol
,
2064 struct snd_ctl_elem_value
*ucontrol
)
2066 struct soc_mixer_control
*mc
=
2067 (struct soc_mixer_control
*)kcontrol
->private_value
;
2068 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2069 unsigned int reg
= mc
->reg
;
2070 unsigned int shift
= mc
->shift
;
2071 unsigned int rshift
= mc
->rshift
;
2073 unsigned int mask
= (1 << fls(max
)) - 1;
2074 unsigned int invert
= mc
->invert
;
2076 ucontrol
->value
.integer
.value
[0] =
2077 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
2078 if (shift
!= rshift
)
2079 ucontrol
->value
.integer
.value
[1] =
2080 (snd_soc_read(codec
, reg
) >> rshift
) & mask
;
2082 ucontrol
->value
.integer
.value
[0] =
2083 max
- ucontrol
->value
.integer
.value
[0];
2084 if (shift
!= rshift
)
2085 ucontrol
->value
.integer
.value
[1] =
2086 max
- ucontrol
->value
.integer
.value
[1];
2091 EXPORT_SYMBOL_GPL(snd_soc_get_volsw
);
2094 * snd_soc_put_volsw - single mixer put callback
2095 * @kcontrol: mixer control
2096 * @ucontrol: control element information
2098 * Callback to set the value of a single mixer control.
2100 * Returns 0 for success.
2102 int snd_soc_put_volsw(struct snd_kcontrol
*kcontrol
,
2103 struct snd_ctl_elem_value
*ucontrol
)
2105 struct soc_mixer_control
*mc
=
2106 (struct soc_mixer_control
*)kcontrol
->private_value
;
2107 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2108 unsigned int reg
= mc
->reg
;
2109 unsigned int shift
= mc
->shift
;
2110 unsigned int rshift
= mc
->rshift
;
2112 unsigned int mask
= (1 << fls(max
)) - 1;
2113 unsigned int invert
= mc
->invert
;
2114 unsigned int val
, val2
, val_mask
;
2116 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2119 val_mask
= mask
<< shift
;
2121 if (shift
!= rshift
) {
2122 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
2125 val_mask
|= mask
<< rshift
;
2126 val
|= val2
<< rshift
;
2128 return snd_soc_update_bits_locked(codec
, reg
, val_mask
, val
);
2130 EXPORT_SYMBOL_GPL(snd_soc_put_volsw
);
2133 * snd_soc_info_volsw_2r - double mixer info callback
2134 * @kcontrol: mixer control
2135 * @uinfo: control element information
2137 * Callback to provide information about a double mixer control that
2138 * spans 2 codec registers.
2140 * Returns 0 for success.
2142 int snd_soc_info_volsw_2r(struct snd_kcontrol
*kcontrol
,
2143 struct snd_ctl_elem_info
*uinfo
)
2145 struct soc_mixer_control
*mc
=
2146 (struct soc_mixer_control
*)kcontrol
->private_value
;
2149 if (!mc
->platform_max
)
2150 mc
->platform_max
= mc
->max
;
2151 platform_max
= mc
->platform_max
;
2153 if (platform_max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
2154 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2156 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2159 uinfo
->value
.integer
.min
= 0;
2160 uinfo
->value
.integer
.max
= platform_max
;
2163 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r
);
2166 * snd_soc_get_volsw_2r - double mixer get callback
2167 * @kcontrol: mixer control
2168 * @ucontrol: control element information
2170 * Callback to get the value of a double mixer control that spans 2 registers.
2172 * Returns 0 for success.
2174 int snd_soc_get_volsw_2r(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
;
2181 unsigned int reg2
= mc
->rreg
;
2182 unsigned int shift
= mc
->shift
;
2184 unsigned int mask
= (1 << fls(max
)) - 1;
2185 unsigned int invert
= mc
->invert
;
2187 ucontrol
->value
.integer
.value
[0] =
2188 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
2189 ucontrol
->value
.integer
.value
[1] =
2190 (snd_soc_read(codec
, reg2
) >> shift
) & mask
;
2192 ucontrol
->value
.integer
.value
[0] =
2193 max
- ucontrol
->value
.integer
.value
[0];
2194 ucontrol
->value
.integer
.value
[1] =
2195 max
- ucontrol
->value
.integer
.value
[1];
2200 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r
);
2203 * snd_soc_put_volsw_2r - double mixer set callback
2204 * @kcontrol: mixer control
2205 * @ucontrol: control element information
2207 * Callback to set the value of a double mixer control that spans 2 registers.
2209 * Returns 0 for success.
2211 int snd_soc_put_volsw_2r(struct snd_kcontrol
*kcontrol
,
2212 struct snd_ctl_elem_value
*ucontrol
)
2214 struct soc_mixer_control
*mc
=
2215 (struct soc_mixer_control
*)kcontrol
->private_value
;
2216 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2217 unsigned int reg
= mc
->reg
;
2218 unsigned int reg2
= mc
->rreg
;
2219 unsigned int shift
= mc
->shift
;
2221 unsigned int mask
= (1 << fls(max
)) - 1;
2222 unsigned int invert
= mc
->invert
;
2224 unsigned int val
, val2
, val_mask
;
2226 val_mask
= mask
<< shift
;
2227 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2228 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
2236 val2
= val2
<< shift
;
2238 err
= snd_soc_update_bits_locked(codec
, reg
, val_mask
, val
);
2242 err
= snd_soc_update_bits_locked(codec
, reg2
, val_mask
, val2
);
2245 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r
);
2248 * snd_soc_info_volsw_s8 - signed mixer info callback
2249 * @kcontrol: mixer control
2250 * @uinfo: control element information
2252 * Callback to provide information about a signed mixer control.
2254 * Returns 0 for success.
2256 int snd_soc_info_volsw_s8(struct snd_kcontrol
*kcontrol
,
2257 struct snd_ctl_elem_info
*uinfo
)
2259 struct soc_mixer_control
*mc
=
2260 (struct soc_mixer_control
*)kcontrol
->private_value
;
2264 if (!mc
->platform_max
)
2265 mc
->platform_max
= mc
->max
;
2266 platform_max
= mc
->platform_max
;
2268 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2270 uinfo
->value
.integer
.min
= 0;
2271 uinfo
->value
.integer
.max
= platform_max
- min
;
2274 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8
);
2277 * snd_soc_get_volsw_s8 - signed mixer get callback
2278 * @kcontrol: mixer control
2279 * @ucontrol: control element information
2281 * Callback to get the value of a signed mixer control.
2283 * Returns 0 for success.
2285 int snd_soc_get_volsw_s8(struct snd_kcontrol
*kcontrol
,
2286 struct snd_ctl_elem_value
*ucontrol
)
2288 struct soc_mixer_control
*mc
=
2289 (struct soc_mixer_control
*)kcontrol
->private_value
;
2290 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2291 unsigned int reg
= mc
->reg
;
2293 int val
= snd_soc_read(codec
, reg
);
2295 ucontrol
->value
.integer
.value
[0] =
2296 ((signed char)(val
& 0xff))-min
;
2297 ucontrol
->value
.integer
.value
[1] =
2298 ((signed char)((val
>> 8) & 0xff))-min
;
2301 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8
);
2304 * snd_soc_put_volsw_sgn - signed mixer put callback
2305 * @kcontrol: mixer control
2306 * @ucontrol: control element information
2308 * Callback to set the value of a signed mixer control.
2310 * Returns 0 for success.
2312 int snd_soc_put_volsw_s8(struct snd_kcontrol
*kcontrol
,
2313 struct snd_ctl_elem_value
*ucontrol
)
2315 struct soc_mixer_control
*mc
=
2316 (struct soc_mixer_control
*)kcontrol
->private_value
;
2317 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2318 unsigned int reg
= mc
->reg
;
2322 val
= (ucontrol
->value
.integer
.value
[0]+min
) & 0xff;
2323 val
|= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff) << 8;
2325 return snd_soc_update_bits_locked(codec
, reg
, 0xffff, val
);
2327 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8
);
2330 * snd_soc_limit_volume - Set new limit to an existing volume control.
2332 * @codec: where to look for the control
2333 * @name: Name of the control
2334 * @max: new maximum limit
2336 * Return 0 for success, else error.
2338 int snd_soc_limit_volume(struct snd_soc_codec
*codec
,
2339 const char *name
, int max
)
2341 struct snd_card
*card
= codec
->card
;
2342 struct snd_kcontrol
*kctl
;
2343 struct soc_mixer_control
*mc
;
2347 /* Sanity check for name and max */
2348 if (unlikely(!name
|| max
<= 0))
2351 list_for_each_entry(kctl
, &card
->controls
, list
) {
2352 if (!strncmp(kctl
->id
.name
, name
, sizeof(kctl
->id
.name
))) {
2358 mc
= (struct soc_mixer_control
*)kctl
->private_value
;
2359 if (max
<= mc
->max
) {
2360 mc
->platform_max
= max
;
2366 EXPORT_SYMBOL_GPL(snd_soc_limit_volume
);
2369 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2370 * mixer info callback
2371 * @kcontrol: mixer control
2372 * @uinfo: control element information
2374 * Returns 0 for success.
2376 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol
*kcontrol
,
2377 struct snd_ctl_elem_info
*uinfo
)
2379 struct soc_mixer_control
*mc
=
2380 (struct soc_mixer_control
*)kcontrol
->private_value
;
2384 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2386 uinfo
->value
.integer
.min
= 0;
2387 uinfo
->value
.integer
.max
= max
-min
;
2391 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx
);
2394 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2395 * mixer get callback
2396 * @kcontrol: mixer control
2397 * @uinfo: control element information
2399 * Returns 0 for success.
2401 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol
*kcontrol
,
2402 struct snd_ctl_elem_value
*ucontrol
)
2404 struct soc_mixer_control
*mc
=
2405 (struct soc_mixer_control
*)kcontrol
->private_value
;
2406 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2407 unsigned int mask
= (1<<mc
->shift
)-1;
2409 int val
= snd_soc_read(codec
, mc
->reg
) & mask
;
2410 int valr
= snd_soc_read(codec
, mc
->rreg
) & mask
;
2412 ucontrol
->value
.integer
.value
[0] = ((val
& 0xff)-min
) & mask
;
2413 ucontrol
->value
.integer
.value
[1] = ((valr
& 0xff)-min
) & mask
;
2416 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx
);
2419 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2420 * mixer put callback
2421 * @kcontrol: mixer control
2422 * @uinfo: control element information
2424 * Returns 0 for success.
2426 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol
*kcontrol
,
2427 struct snd_ctl_elem_value
*ucontrol
)
2429 struct soc_mixer_control
*mc
=
2430 (struct soc_mixer_control
*)kcontrol
->private_value
;
2431 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2432 unsigned int mask
= (1<<mc
->shift
)-1;
2435 unsigned int val
, valr
, oval
, ovalr
;
2437 val
= ((ucontrol
->value
.integer
.value
[0]+min
) & 0xff);
2439 valr
= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff);
2442 oval
= snd_soc_read(codec
, mc
->reg
) & mask
;
2443 ovalr
= snd_soc_read(codec
, mc
->rreg
) & mask
;
2447 ret
= snd_soc_write(codec
, mc
->reg
, val
);
2451 if (ovalr
!= valr
) {
2452 ret
= snd_soc_write(codec
, mc
->rreg
, valr
);
2459 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx
);
2462 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2464 * @clk_id: DAI specific clock ID
2465 * @freq: new clock frequency in Hz
2466 * @dir: new clock direction - input/output.
2468 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2470 int snd_soc_dai_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
2471 unsigned int freq
, int dir
)
2473 if (dai
->ops
&& dai
->ops
->set_sysclk
)
2474 return dai
->ops
->set_sysclk(dai
, clk_id
, freq
, dir
);
2478 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk
);
2481 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2483 * @div_id: DAI specific clock divider ID
2484 * @div: new clock divisor.
2486 * Configures the clock dividers. This is used to derive the best DAI bit and
2487 * frame clocks from the system or master clock. It's best to set the DAI bit
2488 * and frame clocks as low as possible to save system power.
2490 int snd_soc_dai_set_clkdiv(struct snd_soc_dai
*dai
,
2491 int div_id
, int div
)
2493 if (dai
->ops
&& dai
->ops
->set_clkdiv
)
2494 return dai
->ops
->set_clkdiv(dai
, div_id
, div
);
2498 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv
);
2501 * snd_soc_dai_set_pll - configure DAI PLL.
2503 * @pll_id: DAI specific PLL ID
2504 * @source: DAI specific source for the PLL
2505 * @freq_in: PLL input clock frequency in Hz
2506 * @freq_out: requested PLL output clock frequency in Hz
2508 * Configures and enables PLL to generate output clock based on input clock.
2510 int snd_soc_dai_set_pll(struct snd_soc_dai
*dai
, int pll_id
, int source
,
2511 unsigned int freq_in
, unsigned int freq_out
)
2513 if (dai
->ops
&& dai
->ops
->set_pll
)
2514 return dai
->ops
->set_pll(dai
, pll_id
, source
,
2519 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll
);
2522 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2524 * @fmt: SND_SOC_DAIFMT_ format value.
2526 * Configures the DAI hardware format and clocking.
2528 int snd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
2530 if (dai
->ops
&& dai
->ops
->set_fmt
)
2531 return dai
->ops
->set_fmt(dai
, fmt
);
2535 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt
);
2538 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2540 * @tx_mask: bitmask representing active TX slots.
2541 * @rx_mask: bitmask representing active RX slots.
2542 * @slots: Number of slots in use.
2543 * @slot_width: Width in bits for each slot.
2545 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2548 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai
*dai
,
2549 unsigned int tx_mask
, unsigned int rx_mask
, int slots
, int slot_width
)
2551 if (dai
->ops
&& dai
->ops
->set_tdm_slot
)
2552 return dai
->ops
->set_tdm_slot(dai
, tx_mask
, rx_mask
,
2557 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot
);
2560 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2562 * @tx_num: how many TX channels
2563 * @tx_slot: pointer to an array which imply the TX slot number channel
2565 * @rx_num: how many RX channels
2566 * @rx_slot: pointer to an array which imply the RX slot number channel
2569 * configure the relationship between channel number and TDM slot number.
2571 int snd_soc_dai_set_channel_map(struct snd_soc_dai
*dai
,
2572 unsigned int tx_num
, unsigned int *tx_slot
,
2573 unsigned int rx_num
, unsigned int *rx_slot
)
2575 if (dai
->ops
&& dai
->ops
->set_channel_map
)
2576 return dai
->ops
->set_channel_map(dai
, tx_num
, tx_slot
,
2581 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map
);
2584 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2586 * @tristate: tristate enable
2588 * Tristates the DAI so that others can use it.
2590 int snd_soc_dai_set_tristate(struct snd_soc_dai
*dai
, int tristate
)
2592 if (dai
->ops
&& dai
->ops
->set_tristate
)
2593 return dai
->ops
->set_tristate(dai
, tristate
);
2597 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate
);
2600 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2602 * @mute: mute enable
2604 * Mutes the DAI DAC.
2606 int snd_soc_dai_digital_mute(struct snd_soc_dai
*dai
, int mute
)
2608 if (dai
->ops
&& dai
->ops
->digital_mute
)
2609 return dai
->ops
->digital_mute(dai
, mute
);
2613 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute
);
2616 * snd_soc_register_card - Register a card with the ASoC core
2618 * @card: Card to register
2620 * Note that currently this is an internal only function: it will be
2621 * exposed to machine drivers after further backporting of ASoC v2
2622 * registration APIs.
2624 static int snd_soc_register_card(struct snd_soc_card
*card
)
2626 if (!card
->name
|| !card
->dev
)
2629 INIT_LIST_HEAD(&card
->list
);
2630 card
->instantiated
= 0;
2632 mutex_lock(&client_mutex
);
2633 list_add(&card
->list
, &card_list
);
2634 snd_soc_instantiate_cards();
2635 mutex_unlock(&client_mutex
);
2637 dev_dbg(card
->dev
, "Registered card '%s'\n", card
->name
);
2643 * snd_soc_unregister_card - Unregister a card with the ASoC core
2645 * @card: Card to unregister
2647 * Note that currently this is an internal only function: it will be
2648 * exposed to machine drivers after further backporting of ASoC v2
2649 * registration APIs.
2651 static int snd_soc_unregister_card(struct snd_soc_card
*card
)
2653 mutex_lock(&client_mutex
);
2654 list_del(&card
->list
);
2655 mutex_unlock(&client_mutex
);
2657 dev_dbg(card
->dev
, "Unregistered card '%s'\n", card
->name
);
2663 * snd_soc_register_dai - Register a DAI with the ASoC core
2665 * @dai: DAI to register
2667 int snd_soc_register_dai(struct snd_soc_dai
*dai
)
2672 /* The device should become mandatory over time */
2674 printk(KERN_WARNING
"No device for DAI %s\n", dai
->name
);
2677 dai
->ops
= &null_dai_ops
;
2679 INIT_LIST_HEAD(&dai
->list
);
2681 mutex_lock(&client_mutex
);
2682 list_add(&dai
->list
, &dai_list
);
2683 snd_soc_instantiate_cards();
2684 mutex_unlock(&client_mutex
);
2686 pr_debug("Registered DAI '%s'\n", dai
->name
);
2690 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2693 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2695 * @dai: DAI to unregister
2697 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2699 mutex_lock(&client_mutex
);
2700 list_del(&dai
->list
);
2701 mutex_unlock(&client_mutex
);
2703 pr_debug("Unregistered DAI '%s'\n", dai
->name
);
2705 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2708 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2710 * @dai: Array of DAIs to register
2711 * @count: Number of DAIs
2713 int snd_soc_register_dais(struct snd_soc_dai
*dai
, size_t count
)
2717 for (i
= 0; i
< count
; i
++) {
2718 ret
= snd_soc_register_dai(&dai
[i
]);
2726 for (i
--; i
>= 0; i
--)
2727 snd_soc_unregister_dai(&dai
[i
]);
2731 EXPORT_SYMBOL_GPL(snd_soc_register_dais
);
2734 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2736 * @dai: Array of DAIs to unregister
2737 * @count: Number of DAIs
2739 void snd_soc_unregister_dais(struct snd_soc_dai
*dai
, size_t count
)
2743 for (i
= 0; i
< count
; i
++)
2744 snd_soc_unregister_dai(&dai
[i
]);
2746 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais
);
2749 * snd_soc_register_platform - Register a platform with the ASoC core
2751 * @platform: platform to register
2753 int snd_soc_register_platform(struct snd_soc_platform
*platform
)
2755 if (!platform
->name
)
2758 INIT_LIST_HEAD(&platform
->list
);
2760 mutex_lock(&client_mutex
);
2761 list_add(&platform
->list
, &platform_list
);
2762 snd_soc_instantiate_cards();
2763 mutex_unlock(&client_mutex
);
2765 pr_debug("Registered platform '%s'\n", platform
->name
);
2769 EXPORT_SYMBOL_GPL(snd_soc_register_platform
);
2772 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2774 * @platform: platform to unregister
2776 void snd_soc_unregister_platform(struct snd_soc_platform
*platform
)
2778 mutex_lock(&client_mutex
);
2779 list_del(&platform
->list
);
2780 mutex_unlock(&client_mutex
);
2782 pr_debug("Unregistered platform '%s'\n", platform
->name
);
2784 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform
);
2786 static u64 codec_format_map
[] = {
2787 SNDRV_PCM_FMTBIT_S16_LE
| SNDRV_PCM_FMTBIT_S16_BE
,
2788 SNDRV_PCM_FMTBIT_U16_LE
| SNDRV_PCM_FMTBIT_U16_BE
,
2789 SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S24_BE
,
2790 SNDRV_PCM_FMTBIT_U24_LE
| SNDRV_PCM_FMTBIT_U24_BE
,
2791 SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S32_BE
,
2792 SNDRV_PCM_FMTBIT_U32_LE
| SNDRV_PCM_FMTBIT_U32_BE
,
2793 SNDRV_PCM_FMTBIT_S24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2794 SNDRV_PCM_FMTBIT_U24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2795 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S20_3BE
,
2796 SNDRV_PCM_FMTBIT_U20_3LE
| SNDRV_PCM_FMTBIT_U20_3BE
,
2797 SNDRV_PCM_FMTBIT_S18_3LE
| SNDRV_PCM_FMTBIT_S18_3BE
,
2798 SNDRV_PCM_FMTBIT_U18_3LE
| SNDRV_PCM_FMTBIT_U18_3BE
,
2799 SNDRV_PCM_FMTBIT_FLOAT_LE
| SNDRV_PCM_FMTBIT_FLOAT_BE
,
2800 SNDRV_PCM_FMTBIT_FLOAT64_LE
| SNDRV_PCM_FMTBIT_FLOAT64_BE
,
2801 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2802 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
,
2805 /* Fix up the DAI formats for endianness: codecs don't actually see
2806 * the endianness of the data but we're using the CPU format
2807 * definitions which do need to include endianness so we ensure that
2808 * codec DAIs always have both big and little endian variants set.
2810 static void fixup_codec_formats(struct snd_soc_pcm_stream
*stream
)
2814 for (i
= 0; i
< ARRAY_SIZE(codec_format_map
); i
++)
2815 if (stream
->formats
& codec_format_map
[i
])
2816 stream
->formats
|= codec_format_map
[i
];
2820 * snd_soc_register_codec - Register a codec with the ASoC core
2822 * @codec: codec to register
2824 int snd_soc_register_codec(struct snd_soc_codec
*codec
)
2831 /* The device should become mandatory over time */
2833 printk(KERN_WARNING
"No device for codec %s\n", codec
->name
);
2835 INIT_LIST_HEAD(&codec
->list
);
2837 for (i
= 0; i
< codec
->num_dai
; i
++) {
2838 fixup_codec_formats(&codec
->dai
[i
].playback
);
2839 fixup_codec_formats(&codec
->dai
[i
].capture
);
2842 mutex_lock(&client_mutex
);
2843 list_add(&codec
->list
, &codec_list
);
2844 snd_soc_instantiate_cards();
2845 mutex_unlock(&client_mutex
);
2847 pr_debug("Registered codec '%s'\n", codec
->name
);
2851 EXPORT_SYMBOL_GPL(snd_soc_register_codec
);
2854 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2856 * @codec: codec to unregister
2858 void snd_soc_unregister_codec(struct snd_soc_codec
*codec
)
2860 mutex_lock(&client_mutex
);
2861 list_del(&codec
->list
);
2862 mutex_unlock(&client_mutex
);
2864 pr_debug("Unregistered codec '%s'\n", codec
->name
);
2866 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec
);
2868 static int __init
snd_soc_init(void)
2870 #ifdef CONFIG_DEBUG_FS
2871 debugfs_root
= debugfs_create_dir("asoc", NULL
);
2872 if (IS_ERR(debugfs_root
) || !debugfs_root
) {
2874 "ASoC: Failed to create debugfs directory\n");
2875 debugfs_root
= NULL
;
2879 return platform_driver_register(&soc_driver
);
2882 static void __exit
snd_soc_exit(void)
2884 #ifdef CONFIG_DEBUG_FS
2885 debugfs_remove_recursive(debugfs_root
);
2887 platform_driver_unregister(&soc_driver
);
2890 module_init(snd_soc_init
);
2891 module_exit(snd_soc_exit
);
2893 /* Module information */
2894 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2895 MODULE_DESCRIPTION("ALSA SoC Core");
2896 MODULE_LICENSE("GPL");
2897 MODULE_ALIAS("platform:soc-audio");