2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 * with code, comments and ideas from :-
9 * Richard Purdie <richard@openedhand.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
17 * o Add hw rules to enforce rates, etc.
18 * o More testing with other codecs/machines.
19 * o Add more codecs and platforms to ensure good API coverage.
20 * o Support TDM on PCM and I2S
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
28 #include <linux/bitops.h>
29 #include <linux/debugfs.h>
30 #include <linux/platform_device.h>
31 #include <sound/ac97_codec.h>
32 #include <sound/core.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/soc.h>
36 #include <sound/soc-dapm.h>
37 #include <sound/initval.h>
39 static DEFINE_MUTEX(pcm_mutex
);
40 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq
);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry
*debugfs_root
;
46 static DEFINE_MUTEX(client_mutex
);
47 static LIST_HEAD(card_list
);
48 static LIST_HEAD(dai_list
);
49 static LIST_HEAD(platform_list
);
50 static LIST_HEAD(codec_list
);
52 static int snd_soc_register_card(struct snd_soc_card
*card
);
53 static int snd_soc_unregister_card(struct snd_soc_card
*card
);
56 * This is a timeout to do a DAPM powerdown after a stream is closed().
57 * It can be used to eliminate pops between different playback streams, e.g.
58 * between two audio tracks.
60 static int pmdown_time
= 5000;
61 module_param(pmdown_time
, int, 0);
62 MODULE_PARM_DESC(pmdown_time
, "DAPM stream powerdown time (msecs)");
65 * This function forces any delayed work to be queued and run.
67 static int run_delayed_work(struct delayed_work
*dwork
)
71 /* cancel any work waiting to be queued. */
72 ret
= cancel_delayed_work(dwork
);
74 /* if there was any work waiting then we run it now and
75 * wait for it's completion */
77 schedule_delayed_work(dwork
, 0);
78 flush_scheduled_work();
83 /* codec register dump */
84 static ssize_t
soc_codec_reg_show(struct snd_soc_codec
*codec
, char *buf
)
86 int i
, step
= 1, count
= 0;
88 if (!codec
->reg_cache_size
)
91 if (codec
->reg_cache_step
)
92 step
= codec
->reg_cache_step
;
94 count
+= sprintf(buf
, "%s registers\n", codec
->name
);
95 for (i
= 0; i
< codec
->reg_cache_size
; i
+= step
) {
96 if (codec
->readable_register
&& !codec
->readable_register(i
))
99 count
+= sprintf(buf
+ count
, "%2x: ", i
);
100 if (count
>= PAGE_SIZE
- 1)
103 if (codec
->display_register
)
104 count
+= codec
->display_register(codec
, buf
+ count
,
105 PAGE_SIZE
- count
, i
);
107 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
,
108 "%4x", codec
->read(codec
, i
));
110 if (count
>= PAGE_SIZE
- 1)
113 count
+= snprintf(buf
+ count
, PAGE_SIZE
- count
, "\n");
114 if (count
>= PAGE_SIZE
- 1)
118 /* Truncate count; min() would cause a warning */
119 if (count
>= PAGE_SIZE
)
120 count
= PAGE_SIZE
- 1;
124 static ssize_t
codec_reg_show(struct device
*dev
,
125 struct device_attribute
*attr
, char *buf
)
127 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
128 return soc_codec_reg_show(devdata
->card
->codec
, buf
);
131 static DEVICE_ATTR(codec_reg
, 0444, codec_reg_show
, NULL
);
133 static ssize_t
pmdown_time_show(struct device
*dev
,
134 struct device_attribute
*attr
, char *buf
)
136 struct snd_soc_device
*socdev
= dev_get_drvdata(dev
);
137 struct snd_soc_card
*card
= socdev
->card
;
139 return sprintf(buf
, "%ld\n", card
->pmdown_time
);
142 static ssize_t
pmdown_time_set(struct device
*dev
,
143 struct device_attribute
*attr
,
144 const char *buf
, size_t count
)
146 struct snd_soc_device
*socdev
= dev_get_drvdata(dev
);
147 struct snd_soc_card
*card
= socdev
->card
;
149 strict_strtol(buf
, 10, &card
->pmdown_time
);
154 static DEVICE_ATTR(pmdown_time
, 0644, pmdown_time_show
, pmdown_time_set
);
156 #ifdef CONFIG_DEBUG_FS
157 static int codec_reg_open_file(struct inode
*inode
, struct file
*file
)
159 file
->private_data
= inode
->i_private
;
163 static ssize_t
codec_reg_read_file(struct file
*file
, char __user
*user_buf
,
164 size_t count
, loff_t
*ppos
)
167 struct snd_soc_codec
*codec
= file
->private_data
;
168 char *buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
171 ret
= soc_codec_reg_show(codec
, buf
);
173 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
178 static ssize_t
codec_reg_write_file(struct file
*file
,
179 const char __user
*user_buf
, size_t count
, loff_t
*ppos
)
184 unsigned long reg
, value
;
186 struct snd_soc_codec
*codec
= file
->private_data
;
188 buf_size
= min(count
, (sizeof(buf
)-1));
189 if (copy_from_user(buf
, user_buf
, buf_size
))
193 if (codec
->reg_cache_step
)
194 step
= codec
->reg_cache_step
;
196 while (*start
== ' ')
198 reg
= simple_strtoul(start
, &start
, 16);
199 if ((reg
>= codec
->reg_cache_size
) || (reg
% step
))
201 while (*start
== ' ')
203 if (strict_strtoul(start
, 16, &value
))
205 codec
->write(codec
, reg
, value
);
209 static const struct file_operations codec_reg_fops
= {
210 .open
= codec_reg_open_file
,
211 .read
= codec_reg_read_file
,
212 .write
= codec_reg_write_file
,
215 static void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
217 char codec_root
[128];
220 snprintf(codec_root
, sizeof(codec_root
),
221 "%s.%s", codec
->name
, dev_name(codec
->dev
));
223 snprintf(codec_root
, sizeof(codec_root
),
226 codec
->debugfs_codec_root
= debugfs_create_dir(codec_root
,
228 if (!codec
->debugfs_codec_root
) {
230 "ASoC: Failed to create codec debugfs directory\n");
234 codec
->debugfs_reg
= debugfs_create_file("codec_reg", 0644,
235 codec
->debugfs_codec_root
,
236 codec
, &codec_reg_fops
);
237 if (!codec
->debugfs_reg
)
239 "ASoC: Failed to create codec register debugfs file\n");
241 codec
->debugfs_pop_time
= debugfs_create_u32("dapm_pop_time", 0744,
242 codec
->debugfs_codec_root
,
244 if (!codec
->debugfs_pop_time
)
246 "Failed to create pop time debugfs file\n");
248 codec
->debugfs_dapm
= debugfs_create_dir("dapm",
249 codec
->debugfs_codec_root
);
250 if (!codec
->debugfs_dapm
)
252 "Failed to create DAPM debugfs directory\n");
254 snd_soc_dapm_debugfs_init(codec
);
257 static void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
259 debugfs_remove_recursive(codec
->debugfs_codec_root
);
264 static inline void soc_init_codec_debugfs(struct snd_soc_codec
*codec
)
268 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec
*codec
)
273 #ifdef CONFIG_SND_SOC_AC97_BUS
274 /* unregister ac97 codec */
275 static int soc_ac97_dev_unregister(struct snd_soc_codec
*codec
)
277 if (codec
->ac97
->dev
.bus
)
278 device_unregister(&codec
->ac97
->dev
);
282 /* stop no dev release warning */
283 static void soc_ac97_device_release(struct device
*dev
){}
285 /* register ac97 codec to bus */
286 static int soc_ac97_dev_register(struct snd_soc_codec
*codec
)
290 codec
->ac97
->dev
.bus
= &ac97_bus_type
;
291 codec
->ac97
->dev
.parent
= codec
->card
->dev
;
292 codec
->ac97
->dev
.release
= soc_ac97_device_release
;
294 dev_set_name(&codec
->ac97
->dev
, "%d-%d:%s",
295 codec
->card
->number
, 0, codec
->name
);
296 err
= device_register(&codec
->ac97
->dev
);
298 snd_printk(KERN_ERR
"Can't register ac97 bus\n");
299 codec
->ac97
->dev
.bus
= NULL
;
306 static int soc_pcm_apply_symmetry(struct snd_pcm_substream
*substream
)
308 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
309 struct snd_soc_device
*socdev
= rtd
->socdev
;
310 struct snd_soc_card
*card
= socdev
->card
;
311 struct snd_soc_dai_link
*machine
= rtd
->dai
;
312 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
313 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
316 if (codec_dai
->symmetric_rates
|| cpu_dai
->symmetric_rates
||
317 machine
->symmetric_rates
) {
318 dev_dbg(card
->dev
, "Symmetry forces %dHz rate\n",
321 ret
= snd_pcm_hw_constraint_minmax(substream
->runtime
,
322 SNDRV_PCM_HW_PARAM_RATE
,
327 "Unable to apply rate symmetry constraint: %d\n", ret
);
336 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
337 * then initialized and any private data can be allocated. This also calls
338 * startup for the cpu DAI, platform, machine and codec DAI.
340 static int soc_pcm_open(struct snd_pcm_substream
*substream
)
342 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
343 struct snd_soc_device
*socdev
= rtd
->socdev
;
344 struct snd_soc_card
*card
= socdev
->card
;
345 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
346 struct snd_soc_dai_link
*machine
= rtd
->dai
;
347 struct snd_soc_platform
*platform
= card
->platform
;
348 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
349 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
352 mutex_lock(&pcm_mutex
);
354 /* startup the audio subsystem */
355 if (cpu_dai
->ops
->startup
) {
356 ret
= cpu_dai
->ops
->startup(substream
, cpu_dai
);
358 printk(KERN_ERR
"asoc: can't open interface %s\n",
364 if (platform
->pcm_ops
->open
) {
365 ret
= platform
->pcm_ops
->open(substream
);
367 printk(KERN_ERR
"asoc: can't open platform %s\n", platform
->name
);
372 if (codec_dai
->ops
->startup
) {
373 ret
= codec_dai
->ops
->startup(substream
, codec_dai
);
375 printk(KERN_ERR
"asoc: can't open codec %s\n",
381 if (machine
->ops
&& machine
->ops
->startup
) {
382 ret
= machine
->ops
->startup(substream
);
384 printk(KERN_ERR
"asoc: %s startup failed\n", machine
->name
);
389 /* Check that the codec and cpu DAI's are compatible */
390 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
391 runtime
->hw
.rate_min
=
392 max(codec_dai
->playback
.rate_min
,
393 cpu_dai
->playback
.rate_min
);
394 runtime
->hw
.rate_max
=
395 min(codec_dai
->playback
.rate_max
,
396 cpu_dai
->playback
.rate_max
);
397 runtime
->hw
.channels_min
=
398 max(codec_dai
->playback
.channels_min
,
399 cpu_dai
->playback
.channels_min
);
400 runtime
->hw
.channels_max
=
401 min(codec_dai
->playback
.channels_max
,
402 cpu_dai
->playback
.channels_max
);
403 runtime
->hw
.formats
=
404 codec_dai
->playback
.formats
& cpu_dai
->playback
.formats
;
406 codec_dai
->playback
.rates
& cpu_dai
->playback
.rates
;
408 runtime
->hw
.rate_min
=
409 max(codec_dai
->capture
.rate_min
,
410 cpu_dai
->capture
.rate_min
);
411 runtime
->hw
.rate_max
=
412 min(codec_dai
->capture
.rate_max
,
413 cpu_dai
->capture
.rate_max
);
414 runtime
->hw
.channels_min
=
415 max(codec_dai
->capture
.channels_min
,
416 cpu_dai
->capture
.channels_min
);
417 runtime
->hw
.channels_max
=
418 min(codec_dai
->capture
.channels_max
,
419 cpu_dai
->capture
.channels_max
);
420 runtime
->hw
.formats
=
421 codec_dai
->capture
.formats
& cpu_dai
->capture
.formats
;
423 codec_dai
->capture
.rates
& cpu_dai
->capture
.rates
;
426 snd_pcm_limit_hw_rates(runtime
);
427 if (!runtime
->hw
.rates
) {
428 printk(KERN_ERR
"asoc: %s <-> %s No matching rates\n",
429 codec_dai
->name
, cpu_dai
->name
);
432 if (!runtime
->hw
.formats
) {
433 printk(KERN_ERR
"asoc: %s <-> %s No matching formats\n",
434 codec_dai
->name
, cpu_dai
->name
);
437 if (!runtime
->hw
.channels_min
|| !runtime
->hw
.channels_max
) {
438 printk(KERN_ERR
"asoc: %s <-> %s No matching channels\n",
439 codec_dai
->name
, cpu_dai
->name
);
443 /* Symmetry only applies if we've already got an active stream. */
444 if (cpu_dai
->active
|| codec_dai
->active
) {
445 ret
= soc_pcm_apply_symmetry(substream
);
450 pr_debug("asoc: %s <-> %s info:\n", codec_dai
->name
, cpu_dai
->name
);
451 pr_debug("asoc: rate mask 0x%x\n", runtime
->hw
.rates
);
452 pr_debug("asoc: min ch %d max ch %d\n", runtime
->hw
.channels_min
,
453 runtime
->hw
.channels_max
);
454 pr_debug("asoc: min rate %d max rate %d\n", runtime
->hw
.rate_min
,
455 runtime
->hw
.rate_max
);
457 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
458 cpu_dai
->playback
.active
++;
459 codec_dai
->playback
.active
++;
461 cpu_dai
->capture
.active
++;
462 codec_dai
->capture
.active
++;
466 card
->codec
->active
++;
467 mutex_unlock(&pcm_mutex
);
471 if (machine
->ops
&& machine
->ops
->shutdown
)
472 machine
->ops
->shutdown(substream
);
475 if (codec_dai
->ops
->shutdown
)
476 codec_dai
->ops
->shutdown(substream
, codec_dai
);
479 if (platform
->pcm_ops
->close
)
480 platform
->pcm_ops
->close(substream
);
483 if (cpu_dai
->ops
->shutdown
)
484 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
486 mutex_unlock(&pcm_mutex
);
491 * Power down the audio subsystem pmdown_time msecs after close is called.
492 * This is to ensure there are no pops or clicks in between any music tracks
493 * due to DAPM power cycling.
495 static void close_delayed_work(struct work_struct
*work
)
497 struct snd_soc_card
*card
= container_of(work
, struct snd_soc_card
,
499 struct snd_soc_codec
*codec
= card
->codec
;
500 struct snd_soc_dai
*codec_dai
;
503 mutex_lock(&pcm_mutex
);
504 for (i
= 0; i
< codec
->num_dai
; i
++) {
505 codec_dai
= &codec
->dai
[i
];
507 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
508 codec_dai
->playback
.stream_name
,
509 codec_dai
->playback
.active
? "active" : "inactive",
510 codec_dai
->pop_wait
? "yes" : "no");
512 /* are we waiting on this codec DAI stream */
513 if (codec_dai
->pop_wait
== 1) {
514 codec_dai
->pop_wait
= 0;
515 snd_soc_dapm_stream_event(codec
,
516 codec_dai
->playback
.stream_name
,
517 SND_SOC_DAPM_STREAM_STOP
);
520 mutex_unlock(&pcm_mutex
);
524 * Called by ALSA when a PCM substream is closed. Private data can be
525 * freed here. The cpu DAI, codec DAI, machine and platform are also
528 static int soc_codec_close(struct snd_pcm_substream
*substream
)
530 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
531 struct snd_soc_device
*socdev
= rtd
->socdev
;
532 struct snd_soc_card
*card
= socdev
->card
;
533 struct snd_soc_dai_link
*machine
= rtd
->dai
;
534 struct snd_soc_platform
*platform
= card
->platform
;
535 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
536 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
537 struct snd_soc_codec
*codec
= card
->codec
;
539 mutex_lock(&pcm_mutex
);
541 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
542 cpu_dai
->playback
.active
--;
543 codec_dai
->playback
.active
--;
545 cpu_dai
->capture
.active
--;
546 codec_dai
->capture
.active
--;
553 /* Muting the DAC suppresses artifacts caused during digital
554 * shutdown, for example from stopping clocks.
556 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
557 snd_soc_dai_digital_mute(codec_dai
, 1);
559 if (cpu_dai
->ops
->shutdown
)
560 cpu_dai
->ops
->shutdown(substream
, cpu_dai
);
562 if (codec_dai
->ops
->shutdown
)
563 codec_dai
->ops
->shutdown(substream
, codec_dai
);
565 if (machine
->ops
&& machine
->ops
->shutdown
)
566 machine
->ops
->shutdown(substream
);
568 if (platform
->pcm_ops
->close
)
569 platform
->pcm_ops
->close(substream
);
571 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
572 /* start delayed pop wq here for playback streams */
573 codec_dai
->pop_wait
= 1;
574 schedule_delayed_work(&card
->delayed_work
,
575 msecs_to_jiffies(card
->pmdown_time
));
577 /* capture streams can be powered down now */
578 snd_soc_dapm_stream_event(codec
,
579 codec_dai
->capture
.stream_name
,
580 SND_SOC_DAPM_STREAM_STOP
);
583 mutex_unlock(&pcm_mutex
);
588 * Called by ALSA when the PCM substream is prepared, can set format, sample
589 * rate, etc. This function is non atomic and can be called multiple times,
590 * it can refer to the runtime info.
592 static int soc_pcm_prepare(struct snd_pcm_substream
*substream
)
594 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
595 struct snd_soc_device
*socdev
= rtd
->socdev
;
596 struct snd_soc_card
*card
= socdev
->card
;
597 struct snd_soc_dai_link
*machine
= rtd
->dai
;
598 struct snd_soc_platform
*platform
= card
->platform
;
599 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
600 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
601 struct snd_soc_codec
*codec
= card
->codec
;
604 mutex_lock(&pcm_mutex
);
606 if (machine
->ops
&& machine
->ops
->prepare
) {
607 ret
= machine
->ops
->prepare(substream
);
609 printk(KERN_ERR
"asoc: machine prepare error\n");
614 if (platform
->pcm_ops
->prepare
) {
615 ret
= platform
->pcm_ops
->prepare(substream
);
617 printk(KERN_ERR
"asoc: platform prepare error\n");
622 if (codec_dai
->ops
->prepare
) {
623 ret
= codec_dai
->ops
->prepare(substream
, codec_dai
);
625 printk(KERN_ERR
"asoc: codec DAI prepare error\n");
630 if (cpu_dai
->ops
->prepare
) {
631 ret
= cpu_dai
->ops
->prepare(substream
, cpu_dai
);
633 printk(KERN_ERR
"asoc: cpu DAI prepare error\n");
638 /* cancel any delayed stream shutdown that is pending */
639 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
640 codec_dai
->pop_wait
) {
641 codec_dai
->pop_wait
= 0;
642 cancel_delayed_work(&card
->delayed_work
);
645 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
646 snd_soc_dapm_stream_event(codec
,
647 codec_dai
->playback
.stream_name
,
648 SND_SOC_DAPM_STREAM_START
);
650 snd_soc_dapm_stream_event(codec
,
651 codec_dai
->capture
.stream_name
,
652 SND_SOC_DAPM_STREAM_START
);
654 snd_soc_dai_digital_mute(codec_dai
, 0);
657 mutex_unlock(&pcm_mutex
);
662 * Called by ALSA when the hardware params are set by application. This
663 * function can also be called multiple times and can allocate buffers
664 * (using snd_pcm_lib_* ). It's non-atomic.
666 static int soc_pcm_hw_params(struct snd_pcm_substream
*substream
,
667 struct snd_pcm_hw_params
*params
)
669 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
670 struct snd_soc_device
*socdev
= rtd
->socdev
;
671 struct snd_soc_dai_link
*machine
= rtd
->dai
;
672 struct snd_soc_card
*card
= socdev
->card
;
673 struct snd_soc_platform
*platform
= card
->platform
;
674 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
675 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
678 mutex_lock(&pcm_mutex
);
680 if (machine
->ops
&& machine
->ops
->hw_params
) {
681 ret
= machine
->ops
->hw_params(substream
, params
);
683 printk(KERN_ERR
"asoc: machine hw_params failed\n");
688 if (codec_dai
->ops
->hw_params
) {
689 ret
= codec_dai
->ops
->hw_params(substream
, params
, codec_dai
);
691 printk(KERN_ERR
"asoc: can't set codec %s hw params\n",
697 if (cpu_dai
->ops
->hw_params
) {
698 ret
= cpu_dai
->ops
->hw_params(substream
, params
, cpu_dai
);
700 printk(KERN_ERR
"asoc: interface %s hw params failed\n",
706 if (platform
->pcm_ops
->hw_params
) {
707 ret
= platform
->pcm_ops
->hw_params(substream
, params
);
709 printk(KERN_ERR
"asoc: platform %s hw params failed\n",
715 machine
->rate
= params_rate(params
);
718 mutex_unlock(&pcm_mutex
);
722 if (cpu_dai
->ops
->hw_free
)
723 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
726 if (codec_dai
->ops
->hw_free
)
727 codec_dai
->ops
->hw_free(substream
, codec_dai
);
730 if (machine
->ops
&& machine
->ops
->hw_free
)
731 machine
->ops
->hw_free(substream
);
733 mutex_unlock(&pcm_mutex
);
738 * Free's resources allocated by hw_params, can be called multiple times
740 static int soc_pcm_hw_free(struct snd_pcm_substream
*substream
)
742 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
743 struct snd_soc_device
*socdev
= rtd
->socdev
;
744 struct snd_soc_dai_link
*machine
= rtd
->dai
;
745 struct snd_soc_card
*card
= socdev
->card
;
746 struct snd_soc_platform
*platform
= card
->platform
;
747 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
748 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
749 struct snd_soc_codec
*codec
= card
->codec
;
751 mutex_lock(&pcm_mutex
);
753 /* apply codec digital mute */
755 snd_soc_dai_digital_mute(codec_dai
, 1);
757 /* free any machine hw params */
758 if (machine
->ops
&& machine
->ops
->hw_free
)
759 machine
->ops
->hw_free(substream
);
761 /* free any DMA resources */
762 if (platform
->pcm_ops
->hw_free
)
763 platform
->pcm_ops
->hw_free(substream
);
765 /* now free hw params for the DAI's */
766 if (codec_dai
->ops
->hw_free
)
767 codec_dai
->ops
->hw_free(substream
, codec_dai
);
769 if (cpu_dai
->ops
->hw_free
)
770 cpu_dai
->ops
->hw_free(substream
, cpu_dai
);
772 mutex_unlock(&pcm_mutex
);
776 static int soc_pcm_trigger(struct snd_pcm_substream
*substream
, int cmd
)
778 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
779 struct snd_soc_device
*socdev
= rtd
->socdev
;
780 struct snd_soc_card
*card
= socdev
->card
;
781 struct snd_soc_dai_link
*machine
= rtd
->dai
;
782 struct snd_soc_platform
*platform
= card
->platform
;
783 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
784 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
787 if (codec_dai
->ops
->trigger
) {
788 ret
= codec_dai
->ops
->trigger(substream
, cmd
, codec_dai
);
793 if (platform
->pcm_ops
->trigger
) {
794 ret
= platform
->pcm_ops
->trigger(substream
, cmd
);
799 if (cpu_dai
->ops
->trigger
) {
800 ret
= cpu_dai
->ops
->trigger(substream
, cmd
, cpu_dai
);
808 * soc level wrapper for pointer callback
809 * If cpu_dai, codec_dai, platform driver has the delay callback, than
810 * the runtime->delay will be updated accordingly.
812 static snd_pcm_uframes_t
soc_pcm_pointer(struct snd_pcm_substream
*substream
)
814 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
815 struct snd_soc_device
*socdev
= rtd
->socdev
;
816 struct snd_soc_card
*card
= socdev
->card
;
817 struct snd_soc_platform
*platform
= card
->platform
;
818 struct snd_soc_dai_link
*machine
= rtd
->dai
;
819 struct snd_soc_dai
*cpu_dai
= machine
->cpu_dai
;
820 struct snd_soc_dai
*codec_dai
= machine
->codec_dai
;
821 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
822 snd_pcm_uframes_t offset
= 0;
823 snd_pcm_sframes_t delay
= 0;
825 if (platform
->pcm_ops
->pointer
)
826 offset
= platform
->pcm_ops
->pointer(substream
);
828 if (cpu_dai
->ops
->delay
)
829 delay
+= cpu_dai
->ops
->delay(substream
, cpu_dai
);
831 if (codec_dai
->ops
->delay
)
832 delay
+= codec_dai
->ops
->delay(substream
, codec_dai
);
835 delay
+= platform
->delay(substream
, codec_dai
);
837 runtime
->delay
= delay
;
842 /* ASoC PCM operations */
843 static struct snd_pcm_ops soc_pcm_ops
= {
844 .open
= soc_pcm_open
,
845 .close
= soc_codec_close
,
846 .hw_params
= soc_pcm_hw_params
,
847 .hw_free
= soc_pcm_hw_free
,
848 .prepare
= soc_pcm_prepare
,
849 .trigger
= soc_pcm_trigger
,
850 .pointer
= soc_pcm_pointer
,
854 /* powers down audio subsystem for suspend */
855 static int soc_suspend(struct device
*dev
)
857 struct platform_device
*pdev
= to_platform_device(dev
);
858 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
859 struct snd_soc_card
*card
= socdev
->card
;
860 struct snd_soc_platform
*platform
= card
->platform
;
861 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
862 struct snd_soc_codec
*codec
= card
->codec
;
865 /* If the initialization of this soc device failed, there is no codec
866 * associated with it. Just bail out in this case.
871 /* Due to the resume being scheduled into a workqueue we could
872 * suspend before that's finished - wait for it to complete.
874 snd_power_lock(codec
->card
);
875 snd_power_wait(codec
->card
, SNDRV_CTL_POWER_D0
);
876 snd_power_unlock(codec
->card
);
878 /* we're going to block userspace touching us until resume completes */
879 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D3hot
);
881 /* mute any active DAC's */
882 for (i
= 0; i
< card
->num_links
; i
++) {
883 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
884 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
885 dai
->ops
->digital_mute(dai
, 1);
888 /* suspend all pcms */
889 for (i
= 0; i
< card
->num_links
; i
++)
890 snd_pcm_suspend_all(card
->dai_link
[i
].pcm
);
892 if (card
->suspend_pre
)
893 card
->suspend_pre(pdev
, PMSG_SUSPEND
);
895 for (i
= 0; i
< card
->num_links
; i
++) {
896 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
897 if (cpu_dai
->suspend
&& !cpu_dai
->ac97_control
)
898 cpu_dai
->suspend(cpu_dai
);
899 if (platform
->suspend
)
900 platform
->suspend(&card
->dai_link
[i
]);
903 /* close any waiting streams and save state */
904 run_delayed_work(&card
->delayed_work
);
905 codec
->suspend_bias_level
= codec
->bias_level
;
907 for (i
= 0; i
< codec
->num_dai
; i
++) {
908 char *stream
= codec
->dai
[i
].playback
.stream_name
;
910 snd_soc_dapm_stream_event(codec
, stream
,
911 SND_SOC_DAPM_STREAM_SUSPEND
);
912 stream
= codec
->dai
[i
].capture
.stream_name
;
914 snd_soc_dapm_stream_event(codec
, stream
,
915 SND_SOC_DAPM_STREAM_SUSPEND
);
918 if (codec_dev
->suspend
)
919 codec_dev
->suspend(pdev
, PMSG_SUSPEND
);
921 for (i
= 0; i
< card
->num_links
; i
++) {
922 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
923 if (cpu_dai
->suspend
&& cpu_dai
->ac97_control
)
924 cpu_dai
->suspend(cpu_dai
);
927 if (card
->suspend_post
)
928 card
->suspend_post(pdev
, PMSG_SUSPEND
);
933 /* deferred resume work, so resume can complete before we finished
934 * setting our codec back up, which can be very slow on I2C
936 static void soc_resume_deferred(struct work_struct
*work
)
938 struct snd_soc_card
*card
= container_of(work
,
940 deferred_resume_work
);
941 struct snd_soc_device
*socdev
= card
->socdev
;
942 struct snd_soc_platform
*platform
= card
->platform
;
943 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
944 struct snd_soc_codec
*codec
= card
->codec
;
945 struct platform_device
*pdev
= to_platform_device(socdev
->dev
);
948 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
949 * so userspace apps are blocked from touching us
952 dev_dbg(socdev
->dev
, "starting resume work\n");
954 if (card
->resume_pre
)
955 card
->resume_pre(pdev
);
957 for (i
= 0; i
< card
->num_links
; i
++) {
958 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
959 if (cpu_dai
->resume
&& cpu_dai
->ac97_control
)
960 cpu_dai
->resume(cpu_dai
);
963 if (codec_dev
->resume
)
964 codec_dev
->resume(pdev
);
966 for (i
= 0; i
< codec
->num_dai
; i
++) {
967 char *stream
= codec
->dai
[i
].playback
.stream_name
;
969 snd_soc_dapm_stream_event(codec
, stream
,
970 SND_SOC_DAPM_STREAM_RESUME
);
971 stream
= codec
->dai
[i
].capture
.stream_name
;
973 snd_soc_dapm_stream_event(codec
, stream
,
974 SND_SOC_DAPM_STREAM_RESUME
);
977 /* unmute any active DACs */
978 for (i
= 0; i
< card
->num_links
; i
++) {
979 struct snd_soc_dai
*dai
= card
->dai_link
[i
].codec_dai
;
980 if (dai
->ops
->digital_mute
&& dai
->playback
.active
)
981 dai
->ops
->digital_mute(dai
, 0);
984 for (i
= 0; i
< card
->num_links
; i
++) {
985 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
986 if (cpu_dai
->resume
&& !cpu_dai
->ac97_control
)
987 cpu_dai
->resume(cpu_dai
);
988 if (platform
->resume
)
989 platform
->resume(&card
->dai_link
[i
]);
992 if (card
->resume_post
)
993 card
->resume_post(pdev
);
995 dev_dbg(socdev
->dev
, "resume work completed\n");
997 /* userspace can access us now we are back as we were before */
998 snd_power_change_state(codec
->card
, SNDRV_CTL_POWER_D0
);
1001 /* powers up audio subsystem after a suspend */
1002 static int soc_resume(struct device
*dev
)
1004 struct platform_device
*pdev
= to_platform_device(dev
);
1005 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1006 struct snd_soc_card
*card
= socdev
->card
;
1007 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[0].cpu_dai
;
1009 /* If the initialization of this soc device failed, there is no codec
1010 * associated with it. Just bail out in this case.
1015 /* AC97 devices might have other drivers hanging off them so
1016 * need to resume immediately. Other drivers don't have that
1017 * problem and may take a substantial amount of time to resume
1018 * due to I/O costs and anti-pop so handle them out of line.
1020 if (cpu_dai
->ac97_control
) {
1021 dev_dbg(socdev
->dev
, "Resuming AC97 immediately\n");
1022 soc_resume_deferred(&card
->deferred_resume_work
);
1024 dev_dbg(socdev
->dev
, "Scheduling resume work\n");
1025 if (!schedule_work(&card
->deferred_resume_work
))
1026 dev_err(socdev
->dev
, "resume work item may be lost\n");
1032 #define soc_suspend NULL
1033 #define soc_resume NULL
1036 static struct snd_soc_dai_ops null_dai_ops
= {
1039 static void snd_soc_instantiate_card(struct snd_soc_card
*card
)
1041 struct platform_device
*pdev
= container_of(card
->dev
,
1042 struct platform_device
,
1044 struct snd_soc_codec_device
*codec_dev
= card
->socdev
->codec_dev
;
1045 struct snd_soc_codec
*codec
;
1046 struct snd_soc_platform
*platform
;
1047 struct snd_soc_dai
*dai
;
1048 int i
, found
, ret
, ac97
;
1050 if (card
->instantiated
)
1054 list_for_each_entry(platform
, &platform_list
, list
)
1055 if (card
->platform
== platform
) {
1060 dev_dbg(card
->dev
, "Platform %s not registered\n",
1061 card
->platform
->name
);
1066 for (i
= 0; i
< card
->num_links
; i
++) {
1068 list_for_each_entry(dai
, &dai_list
, list
)
1069 if (card
->dai_link
[i
].cpu_dai
== dai
) {
1074 dev_dbg(card
->dev
, "DAI %s not registered\n",
1075 card
->dai_link
[i
].cpu_dai
->name
);
1079 if (card
->dai_link
[i
].cpu_dai
->ac97_control
)
1083 for (i
= 0; i
< card
->num_links
; i
++) {
1084 if (!card
->dai_link
[i
].codec_dai
->ops
)
1085 card
->dai_link
[i
].codec_dai
->ops
= &null_dai_ops
;
1088 /* If we have AC97 in the system then don't wait for the
1089 * codec. This will need revisiting if we have to handle
1090 * systems with mixed AC97 and non-AC97 parts. Only check for
1091 * DAIs currently; we can't do this per link since some AC97
1092 * codecs have non-AC97 DAIs.
1095 for (i
= 0; i
< card
->num_links
; i
++) {
1097 list_for_each_entry(dai
, &dai_list
, list
)
1098 if (card
->dai_link
[i
].codec_dai
== dai
) {
1103 dev_dbg(card
->dev
, "DAI %s not registered\n",
1104 card
->dai_link
[i
].codec_dai
->name
);
1109 /* Note that we do not current check for codec components */
1111 dev_dbg(card
->dev
, "All components present, instantiating\n");
1113 /* Found everything, bring it up */
1114 card
->pmdown_time
= pmdown_time
;
1117 ret
= card
->probe(pdev
);
1122 for (i
= 0; i
< card
->num_links
; i
++) {
1123 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1124 if (cpu_dai
->probe
) {
1125 ret
= cpu_dai
->probe(pdev
, cpu_dai
);
1131 if (codec_dev
->probe
) {
1132 ret
= codec_dev
->probe(pdev
);
1136 codec
= card
->codec
;
1138 if (platform
->probe
) {
1139 ret
= platform
->probe(pdev
);
1144 /* DAPM stream work */
1145 INIT_DELAYED_WORK(&card
->delayed_work
, close_delayed_work
);
1147 /* deferred resume work */
1148 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
1151 for (i
= 0; i
< card
->num_links
; i
++) {
1152 if (card
->dai_link
[i
].init
) {
1153 ret
= card
->dai_link
[i
].init(codec
);
1155 printk(KERN_ERR
"asoc: failed to init %s\n",
1156 card
->dai_link
[i
].stream_name
);
1160 if (card
->dai_link
[i
].codec_dai
->ac97_control
)
1164 snprintf(codec
->card
->shortname
, sizeof(codec
->card
->shortname
),
1166 snprintf(codec
->card
->longname
, sizeof(codec
->card
->longname
),
1167 "%s (%s)", card
->name
, codec
->name
);
1169 /* Make sure all DAPM widgets are instantiated */
1170 snd_soc_dapm_new_widgets(codec
);
1172 ret
= snd_card_register(codec
->card
);
1174 printk(KERN_ERR
"asoc: failed to register soundcard for %s\n",
1179 mutex_lock(&codec
->mutex
);
1180 #ifdef CONFIG_SND_SOC_AC97_BUS
1181 /* Only instantiate AC97 if not already done by the adaptor
1182 * for the generic AC97 subsystem.
1184 if (ac97
&& strcmp(codec
->name
, "AC97") != 0) {
1185 ret
= soc_ac97_dev_register(codec
);
1187 printk(KERN_ERR
"asoc: AC97 device register failed\n");
1188 snd_card_free(codec
->card
);
1189 mutex_unlock(&codec
->mutex
);
1195 ret
= snd_soc_dapm_sys_add(card
->socdev
->dev
);
1197 printk(KERN_WARNING
"asoc: failed to add dapm sysfs entries\n");
1199 ret
= device_create_file(card
->socdev
->dev
, &dev_attr_pmdown_time
);
1201 printk(KERN_WARNING
"asoc: failed to add pmdown_time sysfs\n");
1203 ret
= device_create_file(card
->socdev
->dev
, &dev_attr_codec_reg
);
1205 printk(KERN_WARNING
"asoc: failed to add codec sysfs files\n");
1207 soc_init_codec_debugfs(codec
);
1208 mutex_unlock(&codec
->mutex
);
1210 card
->instantiated
= 1;
1215 if (platform
->remove
)
1216 platform
->remove(pdev
);
1219 if (codec_dev
->remove
)
1220 codec_dev
->remove(pdev
);
1223 for (i
--; i
>= 0; i
--) {
1224 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1225 if (cpu_dai
->remove
)
1226 cpu_dai
->remove(pdev
, cpu_dai
);
1234 * Attempt to initialise any uninitalised cards. Must be called with
1237 static void snd_soc_instantiate_cards(void)
1239 struct snd_soc_card
*card
;
1240 list_for_each_entry(card
, &card_list
, list
)
1241 snd_soc_instantiate_card(card
);
1244 /* probes a new socdev */
1245 static int soc_probe(struct platform_device
*pdev
)
1248 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1249 struct snd_soc_card
*card
= socdev
->card
;
1251 /* Bodge while we push things out of socdev */
1252 card
->socdev
= socdev
;
1254 /* Bodge while we unpick instantiation */
1255 card
->dev
= &pdev
->dev
;
1256 ret
= snd_soc_register_card(card
);
1258 dev_err(&pdev
->dev
, "Failed to register card\n");
1265 /* removes a socdev */
1266 static int soc_remove(struct platform_device
*pdev
)
1269 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1270 struct snd_soc_card
*card
= socdev
->card
;
1271 struct snd_soc_platform
*platform
= card
->platform
;
1272 struct snd_soc_codec_device
*codec_dev
= socdev
->codec_dev
;
1274 if (!card
->instantiated
)
1277 run_delayed_work(&card
->delayed_work
);
1279 if (platform
->remove
)
1280 platform
->remove(pdev
);
1282 if (codec_dev
->remove
)
1283 codec_dev
->remove(pdev
);
1285 for (i
= 0; i
< card
->num_links
; i
++) {
1286 struct snd_soc_dai
*cpu_dai
= card
->dai_link
[i
].cpu_dai
;
1287 if (cpu_dai
->remove
)
1288 cpu_dai
->remove(pdev
, cpu_dai
);
1294 snd_soc_unregister_card(card
);
1299 static int soc_poweroff(struct device
*dev
)
1301 struct platform_device
*pdev
= to_platform_device(dev
);
1302 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
1303 struct snd_soc_card
*card
= socdev
->card
;
1305 if (!card
->instantiated
)
1308 /* Flush out pmdown_time work - we actually do want to run it
1309 * now, we're shutting down so no imminent restart. */
1310 run_delayed_work(&card
->delayed_work
);
1312 snd_soc_dapm_shutdown(socdev
);
1317 static const struct dev_pm_ops soc_pm_ops
= {
1318 .suspend
= soc_suspend
,
1319 .resume
= soc_resume
,
1320 .poweroff
= soc_poweroff
,
1323 /* ASoC platform driver */
1324 static struct platform_driver soc_driver
= {
1326 .name
= "soc-audio",
1327 .owner
= THIS_MODULE
,
1331 .remove
= soc_remove
,
1334 /* create a new pcm */
1335 static int soc_new_pcm(struct snd_soc_device
*socdev
,
1336 struct snd_soc_dai_link
*dai_link
, int num
)
1338 struct snd_soc_card
*card
= socdev
->card
;
1339 struct snd_soc_codec
*codec
= card
->codec
;
1340 struct snd_soc_platform
*platform
= card
->platform
;
1341 struct snd_soc_dai
*codec_dai
= dai_link
->codec_dai
;
1342 struct snd_soc_dai
*cpu_dai
= dai_link
->cpu_dai
;
1343 struct snd_soc_pcm_runtime
*rtd
;
1344 struct snd_pcm
*pcm
;
1346 int ret
= 0, playback
= 0, capture
= 0;
1348 rtd
= kzalloc(sizeof(struct snd_soc_pcm_runtime
), GFP_KERNEL
);
1352 rtd
->dai
= dai_link
;
1353 rtd
->socdev
= socdev
;
1354 codec_dai
->codec
= card
->codec
;
1356 /* check client and interface hw capabilities */
1357 snprintf(new_name
, sizeof(new_name
), "%s %s-%d",
1358 dai_link
->stream_name
, codec_dai
->name
, num
);
1360 if (codec_dai
->playback
.channels_min
)
1362 if (codec_dai
->capture
.channels_min
)
1365 ret
= snd_pcm_new(codec
->card
, new_name
, codec
->pcm_devs
++, playback
,
1368 printk(KERN_ERR
"asoc: can't create pcm for codec %s\n",
1374 dai_link
->pcm
= pcm
;
1375 pcm
->private_data
= rtd
;
1376 soc_pcm_ops
.mmap
= platform
->pcm_ops
->mmap
;
1377 soc_pcm_ops
.ioctl
= platform
->pcm_ops
->ioctl
;
1378 soc_pcm_ops
.copy
= platform
->pcm_ops
->copy
;
1379 soc_pcm_ops
.silence
= platform
->pcm_ops
->silence
;
1380 soc_pcm_ops
.ack
= platform
->pcm_ops
->ack
;
1381 soc_pcm_ops
.page
= platform
->pcm_ops
->page
;
1384 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, &soc_pcm_ops
);
1387 snd_pcm_set_ops(pcm
, SNDRV_PCM_STREAM_CAPTURE
, &soc_pcm_ops
);
1389 ret
= platform
->pcm_new(codec
->card
, codec_dai
, pcm
);
1391 printk(KERN_ERR
"asoc: platform pcm constructor failed\n");
1396 pcm
->private_free
= platform
->pcm_free
;
1397 printk(KERN_INFO
"asoc: %s <-> %s mapping ok\n", codec_dai
->name
,
1403 * snd_soc_codec_volatile_register: Report if a register is volatile.
1405 * @codec: CODEC to query.
1406 * @reg: Register to query.
1408 * Boolean function indiciating if a CODEC register is volatile.
1410 int snd_soc_codec_volatile_register(struct snd_soc_codec
*codec
, int reg
)
1412 if (codec
->volatile_register
)
1413 return codec
->volatile_register(reg
);
1417 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register
);
1420 * snd_soc_new_ac97_codec - initailise AC97 device
1421 * @codec: audio codec
1422 * @ops: AC97 bus operations
1423 * @num: AC97 codec number
1425 * Initialises AC97 codec resources for use by ad-hoc devices only.
1427 int snd_soc_new_ac97_codec(struct snd_soc_codec
*codec
,
1428 struct snd_ac97_bus_ops
*ops
, int num
)
1430 mutex_lock(&codec
->mutex
);
1432 codec
->ac97
= kzalloc(sizeof(struct snd_ac97
), GFP_KERNEL
);
1433 if (codec
->ac97
== NULL
) {
1434 mutex_unlock(&codec
->mutex
);
1438 codec
->ac97
->bus
= kzalloc(sizeof(struct snd_ac97_bus
), GFP_KERNEL
);
1439 if (codec
->ac97
->bus
== NULL
) {
1442 mutex_unlock(&codec
->mutex
);
1446 codec
->ac97
->bus
->ops
= ops
;
1447 codec
->ac97
->num
= num
;
1448 codec
->dev
= &codec
->ac97
->dev
;
1449 mutex_unlock(&codec
->mutex
);
1452 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec
);
1455 * snd_soc_free_ac97_codec - free AC97 codec device
1456 * @codec: audio codec
1458 * Frees AC97 codec device resources.
1460 void snd_soc_free_ac97_codec(struct snd_soc_codec
*codec
)
1462 mutex_lock(&codec
->mutex
);
1463 kfree(codec
->ac97
->bus
);
1466 mutex_unlock(&codec
->mutex
);
1468 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec
);
1471 * snd_soc_update_bits - update codec register bits
1472 * @codec: audio codec
1473 * @reg: codec register
1474 * @mask: register mask
1477 * Writes new register value.
1479 * Returns 1 for change else 0.
1481 int snd_soc_update_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1482 unsigned int mask
, unsigned int value
)
1485 unsigned int old
, new;
1487 old
= snd_soc_read(codec
, reg
);
1488 new = (old
& ~mask
) | value
;
1489 change
= old
!= new;
1491 snd_soc_write(codec
, reg
, new);
1495 EXPORT_SYMBOL_GPL(snd_soc_update_bits
);
1498 * snd_soc_update_bits_locked - update codec register bits
1499 * @codec: audio codec
1500 * @reg: codec register
1501 * @mask: register mask
1504 * Writes new register value, and takes the codec mutex.
1506 * Returns 1 for change else 0.
1508 int snd_soc_update_bits_locked(struct snd_soc_codec
*codec
,
1509 unsigned short reg
, unsigned int mask
,
1514 mutex_lock(&codec
->mutex
);
1515 change
= snd_soc_update_bits(codec
, reg
, mask
, value
);
1516 mutex_unlock(&codec
->mutex
);
1520 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked
);
1523 * snd_soc_test_bits - test register for change
1524 * @codec: audio codec
1525 * @reg: codec register
1526 * @mask: register mask
1529 * Tests a register with a new value and checks if the new value is
1530 * different from the old value.
1532 * Returns 1 for change else 0.
1534 int snd_soc_test_bits(struct snd_soc_codec
*codec
, unsigned short reg
,
1535 unsigned int mask
, unsigned int value
)
1538 unsigned int old
, new;
1540 old
= snd_soc_read(codec
, reg
);
1541 new = (old
& ~mask
) | value
;
1542 change
= old
!= new;
1546 EXPORT_SYMBOL_GPL(snd_soc_test_bits
);
1549 * snd_soc_new_pcms - create new sound card and pcms
1550 * @socdev: the SoC audio device
1551 * @idx: ALSA card index
1552 * @xid: card identification
1554 * Create a new sound card based upon the codec and interface pcms.
1556 * Returns 0 for success, else error.
1558 int snd_soc_new_pcms(struct snd_soc_device
*socdev
, int idx
, const char *xid
)
1560 struct snd_soc_card
*card
= socdev
->card
;
1561 struct snd_soc_codec
*codec
= card
->codec
;
1564 mutex_lock(&codec
->mutex
);
1566 /* register a sound card */
1567 ret
= snd_card_create(idx
, xid
, codec
->owner
, 0, &codec
->card
);
1569 printk(KERN_ERR
"asoc: can't create sound card for codec %s\n",
1571 mutex_unlock(&codec
->mutex
);
1575 codec
->socdev
= socdev
;
1576 codec
->card
->dev
= socdev
->dev
;
1577 codec
->card
->private_data
= codec
;
1578 strncpy(codec
->card
->driver
, codec
->name
, sizeof(codec
->card
->driver
));
1580 /* create the pcms */
1581 for (i
= 0; i
< card
->num_links
; i
++) {
1582 ret
= soc_new_pcm(socdev
, &card
->dai_link
[i
], i
);
1584 printk(KERN_ERR
"asoc: can't create pcm %s\n",
1585 card
->dai_link
[i
].stream_name
);
1586 mutex_unlock(&codec
->mutex
);
1589 if (card
->dai_link
[i
].codec_dai
->ac97_control
) {
1590 snd_ac97_dev_add_pdata(codec
->ac97
,
1591 card
->dai_link
[i
].cpu_dai
->ac97_pdata
);
1595 mutex_unlock(&codec
->mutex
);
1598 EXPORT_SYMBOL_GPL(snd_soc_new_pcms
);
1601 * snd_soc_free_pcms - free sound card and pcms
1602 * @socdev: the SoC audio device
1604 * Frees sound card and pcms associated with the socdev.
1605 * Also unregister the codec if it is an AC97 device.
1607 void snd_soc_free_pcms(struct snd_soc_device
*socdev
)
1609 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1610 #ifdef CONFIG_SND_SOC_AC97_BUS
1611 struct snd_soc_dai
*codec_dai
;
1615 mutex_lock(&codec
->mutex
);
1616 soc_cleanup_codec_debugfs(codec
);
1617 #ifdef CONFIG_SND_SOC_AC97_BUS
1618 for (i
= 0; i
< codec
->num_dai
; i
++) {
1619 codec_dai
= &codec
->dai
[i
];
1620 if (codec_dai
->ac97_control
&& codec
->ac97
&&
1621 strcmp(codec
->name
, "AC97") != 0) {
1622 soc_ac97_dev_unregister(codec
);
1630 snd_card_free(codec
->card
);
1631 device_remove_file(socdev
->dev
, &dev_attr_codec_reg
);
1632 mutex_unlock(&codec
->mutex
);
1634 EXPORT_SYMBOL_GPL(snd_soc_free_pcms
);
1637 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1638 * @substream: the pcm substream
1639 * @hw: the hardware parameters
1641 * Sets the substream runtime hardware parameters.
1643 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream
*substream
,
1644 const struct snd_pcm_hardware
*hw
)
1646 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1647 runtime
->hw
.info
= hw
->info
;
1648 runtime
->hw
.formats
= hw
->formats
;
1649 runtime
->hw
.period_bytes_min
= hw
->period_bytes_min
;
1650 runtime
->hw
.period_bytes_max
= hw
->period_bytes_max
;
1651 runtime
->hw
.periods_min
= hw
->periods_min
;
1652 runtime
->hw
.periods_max
= hw
->periods_max
;
1653 runtime
->hw
.buffer_bytes_max
= hw
->buffer_bytes_max
;
1654 runtime
->hw
.fifo_size
= hw
->fifo_size
;
1657 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams
);
1660 * snd_soc_cnew - create new control
1661 * @_template: control template
1662 * @data: control private data
1663 * @long_name: control long name
1665 * Create a new mixer control from a template control.
1667 * Returns 0 for success, else error.
1669 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
1670 void *data
, char *long_name
)
1672 struct snd_kcontrol_new
template;
1674 memcpy(&template, _template
, sizeof(template));
1676 template.name
= long_name
;
1679 return snd_ctl_new1(&template, data
);
1681 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
1684 * snd_soc_add_controls - add an array of controls to a codec.
1685 * Convienience function to add a list of controls. Many codecs were
1686 * duplicating this code.
1688 * @codec: codec to add controls to
1689 * @controls: array of controls to add
1690 * @num_controls: number of elements in the array
1692 * Return 0 for success, else error.
1694 int snd_soc_add_controls(struct snd_soc_codec
*codec
,
1695 const struct snd_kcontrol_new
*controls
, int num_controls
)
1697 struct snd_card
*card
= codec
->card
;
1700 for (i
= 0; i
< num_controls
; i
++) {
1701 const struct snd_kcontrol_new
*control
= &controls
[i
];
1702 err
= snd_ctl_add(card
, snd_soc_cnew(control
, codec
, NULL
));
1704 dev_err(codec
->dev
, "%s: Failed to add %s\n",
1705 codec
->name
, control
->name
);
1712 EXPORT_SYMBOL_GPL(snd_soc_add_controls
);
1715 * snd_soc_info_enum_double - enumerated double mixer info callback
1716 * @kcontrol: mixer control
1717 * @uinfo: control element information
1719 * Callback to provide information about a double enumerated
1722 * Returns 0 for success.
1724 int snd_soc_info_enum_double(struct snd_kcontrol
*kcontrol
,
1725 struct snd_ctl_elem_info
*uinfo
)
1727 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1729 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1730 uinfo
->count
= e
->shift_l
== e
->shift_r
? 1 : 2;
1731 uinfo
->value
.enumerated
.items
= e
->max
;
1733 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1734 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1735 strcpy(uinfo
->value
.enumerated
.name
,
1736 e
->texts
[uinfo
->value
.enumerated
.item
]);
1739 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double
);
1742 * snd_soc_get_enum_double - enumerated double mixer get callback
1743 * @kcontrol: mixer control
1744 * @ucontrol: control element information
1746 * Callback to get the value of a double enumerated mixer.
1748 * Returns 0 for success.
1750 int snd_soc_get_enum_double(struct snd_kcontrol
*kcontrol
,
1751 struct snd_ctl_elem_value
*ucontrol
)
1753 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1754 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1755 unsigned int val
, bitmask
;
1757 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1759 val
= snd_soc_read(codec
, e
->reg
);
1760 ucontrol
->value
.enumerated
.item
[0]
1761 = (val
>> e
->shift_l
) & (bitmask
- 1);
1762 if (e
->shift_l
!= e
->shift_r
)
1763 ucontrol
->value
.enumerated
.item
[1] =
1764 (val
>> e
->shift_r
) & (bitmask
- 1);
1768 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double
);
1771 * snd_soc_put_enum_double - enumerated double mixer put callback
1772 * @kcontrol: mixer control
1773 * @ucontrol: control element information
1775 * Callback to set the value of a double enumerated mixer.
1777 * Returns 0 for success.
1779 int snd_soc_put_enum_double(struct snd_kcontrol
*kcontrol
,
1780 struct snd_ctl_elem_value
*ucontrol
)
1782 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1783 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1785 unsigned int mask
, bitmask
;
1787 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1789 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1791 val
= ucontrol
->value
.enumerated
.item
[0] << e
->shift_l
;
1792 mask
= (bitmask
- 1) << e
->shift_l
;
1793 if (e
->shift_l
!= e
->shift_r
) {
1794 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1796 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1797 mask
|= (bitmask
- 1) << e
->shift_r
;
1800 return snd_soc_update_bits_locked(codec
, e
->reg
, mask
, val
);
1802 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double
);
1805 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1806 * @kcontrol: mixer control
1807 * @ucontrol: control element information
1809 * Callback to get the value of a double semi enumerated mixer.
1811 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1812 * used for handling bitfield coded enumeration for example.
1814 * Returns 0 for success.
1816 int snd_soc_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1817 struct snd_ctl_elem_value
*ucontrol
)
1819 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1820 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1821 unsigned int reg_val
, val
, mux
;
1823 reg_val
= snd_soc_read(codec
, e
->reg
);
1824 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1825 for (mux
= 0; mux
< e
->max
; mux
++) {
1826 if (val
== e
->values
[mux
])
1829 ucontrol
->value
.enumerated
.item
[0] = mux
;
1830 if (e
->shift_l
!= e
->shift_r
) {
1831 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1832 for (mux
= 0; mux
< e
->max
; mux
++) {
1833 if (val
== e
->values
[mux
])
1836 ucontrol
->value
.enumerated
.item
[1] = mux
;
1841 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double
);
1844 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1845 * @kcontrol: mixer control
1846 * @ucontrol: control element information
1848 * Callback to set the value of a double semi enumerated mixer.
1850 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1851 * used for handling bitfield coded enumeration for example.
1853 * Returns 0 for success.
1855 int snd_soc_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1856 struct snd_ctl_elem_value
*ucontrol
)
1858 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1859 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1863 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1865 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1866 mask
= e
->mask
<< e
->shift_l
;
1867 if (e
->shift_l
!= e
->shift_r
) {
1868 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1870 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1871 mask
|= e
->mask
<< e
->shift_r
;
1874 return snd_soc_update_bits_locked(codec
, e
->reg
, mask
, val
);
1876 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double
);
1879 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1880 * @kcontrol: mixer control
1881 * @uinfo: control element information
1883 * Callback to provide information about an external enumerated
1886 * Returns 0 for success.
1888 int snd_soc_info_enum_ext(struct snd_kcontrol
*kcontrol
,
1889 struct snd_ctl_elem_info
*uinfo
)
1891 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1893 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_ENUMERATED
;
1895 uinfo
->value
.enumerated
.items
= e
->max
;
1897 if (uinfo
->value
.enumerated
.item
> e
->max
- 1)
1898 uinfo
->value
.enumerated
.item
= e
->max
- 1;
1899 strcpy(uinfo
->value
.enumerated
.name
,
1900 e
->texts
[uinfo
->value
.enumerated
.item
]);
1903 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext
);
1906 * snd_soc_info_volsw_ext - external single mixer info callback
1907 * @kcontrol: mixer control
1908 * @uinfo: control element information
1910 * Callback to provide information about a single external mixer control.
1912 * Returns 0 for success.
1914 int snd_soc_info_volsw_ext(struct snd_kcontrol
*kcontrol
,
1915 struct snd_ctl_elem_info
*uinfo
)
1917 int max
= kcontrol
->private_value
;
1919 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1920 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1922 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1925 uinfo
->value
.integer
.min
= 0;
1926 uinfo
->value
.integer
.max
= max
;
1929 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext
);
1932 * snd_soc_info_volsw - single mixer info callback
1933 * @kcontrol: mixer control
1934 * @uinfo: control element information
1936 * Callback to provide information about a single mixer control.
1938 * Returns 0 for success.
1940 int snd_soc_info_volsw(struct snd_kcontrol
*kcontrol
,
1941 struct snd_ctl_elem_info
*uinfo
)
1943 struct soc_mixer_control
*mc
=
1944 (struct soc_mixer_control
*)kcontrol
->private_value
;
1946 unsigned int shift
= mc
->shift
;
1947 unsigned int rshift
= mc
->rshift
;
1949 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
1950 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1952 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
1954 uinfo
->count
= shift
== rshift
? 1 : 2;
1955 uinfo
->value
.integer
.min
= 0;
1956 uinfo
->value
.integer
.max
= max
;
1959 EXPORT_SYMBOL_GPL(snd_soc_info_volsw
);
1962 * snd_soc_get_volsw - single mixer get callback
1963 * @kcontrol: mixer control
1964 * @ucontrol: control element information
1966 * Callback to get the value of a single mixer control.
1968 * Returns 0 for success.
1970 int snd_soc_get_volsw(struct snd_kcontrol
*kcontrol
,
1971 struct snd_ctl_elem_value
*ucontrol
)
1973 struct soc_mixer_control
*mc
=
1974 (struct soc_mixer_control
*)kcontrol
->private_value
;
1975 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1976 unsigned int reg
= mc
->reg
;
1977 unsigned int shift
= mc
->shift
;
1978 unsigned int rshift
= mc
->rshift
;
1980 unsigned int mask
= (1 << fls(max
)) - 1;
1981 unsigned int invert
= mc
->invert
;
1983 ucontrol
->value
.integer
.value
[0] =
1984 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
1985 if (shift
!= rshift
)
1986 ucontrol
->value
.integer
.value
[1] =
1987 (snd_soc_read(codec
, reg
) >> rshift
) & mask
;
1989 ucontrol
->value
.integer
.value
[0] =
1990 max
- ucontrol
->value
.integer
.value
[0];
1991 if (shift
!= rshift
)
1992 ucontrol
->value
.integer
.value
[1] =
1993 max
- ucontrol
->value
.integer
.value
[1];
1998 EXPORT_SYMBOL_GPL(snd_soc_get_volsw
);
2001 * snd_soc_put_volsw - single mixer put callback
2002 * @kcontrol: mixer control
2003 * @ucontrol: control element information
2005 * Callback to set the value of a single mixer control.
2007 * Returns 0 for success.
2009 int snd_soc_put_volsw(struct snd_kcontrol
*kcontrol
,
2010 struct snd_ctl_elem_value
*ucontrol
)
2012 struct soc_mixer_control
*mc
=
2013 (struct soc_mixer_control
*)kcontrol
->private_value
;
2014 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2015 unsigned int reg
= mc
->reg
;
2016 unsigned int shift
= mc
->shift
;
2017 unsigned int rshift
= mc
->rshift
;
2019 unsigned int mask
= (1 << fls(max
)) - 1;
2020 unsigned int invert
= mc
->invert
;
2021 unsigned int val
, val2
, val_mask
;
2023 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2026 val_mask
= mask
<< shift
;
2028 if (shift
!= rshift
) {
2029 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
2032 val_mask
|= mask
<< rshift
;
2033 val
|= val2
<< rshift
;
2035 return snd_soc_update_bits_locked(codec
, reg
, val_mask
, val
);
2037 EXPORT_SYMBOL_GPL(snd_soc_put_volsw
);
2040 * snd_soc_info_volsw_2r - double mixer info callback
2041 * @kcontrol: mixer control
2042 * @uinfo: control element information
2044 * Callback to provide information about a double mixer control that
2045 * spans 2 codec registers.
2047 * Returns 0 for success.
2049 int snd_soc_info_volsw_2r(struct snd_kcontrol
*kcontrol
,
2050 struct snd_ctl_elem_info
*uinfo
)
2052 struct soc_mixer_control
*mc
=
2053 (struct soc_mixer_control
*)kcontrol
->private_value
;
2056 if (max
== 1 && !strstr(kcontrol
->id
.name
, " Volume"))
2057 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2059 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2062 uinfo
->value
.integer
.min
= 0;
2063 uinfo
->value
.integer
.max
= max
;
2066 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r
);
2069 * snd_soc_get_volsw_2r - double mixer get callback
2070 * @kcontrol: mixer control
2071 * @ucontrol: control element information
2073 * Callback to get the value of a double mixer control that spans 2 registers.
2075 * Returns 0 for success.
2077 int snd_soc_get_volsw_2r(struct snd_kcontrol
*kcontrol
,
2078 struct snd_ctl_elem_value
*ucontrol
)
2080 struct soc_mixer_control
*mc
=
2081 (struct soc_mixer_control
*)kcontrol
->private_value
;
2082 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2083 unsigned int reg
= mc
->reg
;
2084 unsigned int reg2
= mc
->rreg
;
2085 unsigned int shift
= mc
->shift
;
2087 unsigned int mask
= (1 << fls(max
)) - 1;
2088 unsigned int invert
= mc
->invert
;
2090 ucontrol
->value
.integer
.value
[0] =
2091 (snd_soc_read(codec
, reg
) >> shift
) & mask
;
2092 ucontrol
->value
.integer
.value
[1] =
2093 (snd_soc_read(codec
, reg2
) >> shift
) & mask
;
2095 ucontrol
->value
.integer
.value
[0] =
2096 max
- ucontrol
->value
.integer
.value
[0];
2097 ucontrol
->value
.integer
.value
[1] =
2098 max
- ucontrol
->value
.integer
.value
[1];
2103 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r
);
2106 * snd_soc_put_volsw_2r - double mixer set callback
2107 * @kcontrol: mixer control
2108 * @ucontrol: control element information
2110 * Callback to set the value of a double mixer control that spans 2 registers.
2112 * Returns 0 for success.
2114 int snd_soc_put_volsw_2r(struct snd_kcontrol
*kcontrol
,
2115 struct snd_ctl_elem_value
*ucontrol
)
2117 struct soc_mixer_control
*mc
=
2118 (struct soc_mixer_control
*)kcontrol
->private_value
;
2119 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2120 unsigned int reg
= mc
->reg
;
2121 unsigned int reg2
= mc
->rreg
;
2122 unsigned int shift
= mc
->shift
;
2124 unsigned int mask
= (1 << fls(max
)) - 1;
2125 unsigned int invert
= mc
->invert
;
2127 unsigned int val
, val2
, val_mask
;
2129 val_mask
= mask
<< shift
;
2130 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2131 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
2139 val2
= val2
<< shift
;
2141 err
= snd_soc_update_bits_locked(codec
, reg
, val_mask
, val
);
2145 err
= snd_soc_update_bits_locked(codec
, reg2
, val_mask
, val2
);
2148 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r
);
2151 * snd_soc_info_volsw_s8 - signed mixer info callback
2152 * @kcontrol: mixer control
2153 * @uinfo: control element information
2155 * Callback to provide information about a signed mixer control.
2157 * Returns 0 for success.
2159 int snd_soc_info_volsw_s8(struct snd_kcontrol
*kcontrol
,
2160 struct snd_ctl_elem_info
*uinfo
)
2162 struct soc_mixer_control
*mc
=
2163 (struct soc_mixer_control
*)kcontrol
->private_value
;
2167 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
2169 uinfo
->value
.integer
.min
= 0;
2170 uinfo
->value
.integer
.max
= max
-min
;
2173 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8
);
2176 * snd_soc_get_volsw_s8 - signed mixer get callback
2177 * @kcontrol: mixer control
2178 * @ucontrol: control element information
2180 * Callback to get the value of a signed mixer control.
2182 * Returns 0 for success.
2184 int snd_soc_get_volsw_s8(struct snd_kcontrol
*kcontrol
,
2185 struct snd_ctl_elem_value
*ucontrol
)
2187 struct soc_mixer_control
*mc
=
2188 (struct soc_mixer_control
*)kcontrol
->private_value
;
2189 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2190 unsigned int reg
= mc
->reg
;
2192 int val
= snd_soc_read(codec
, reg
);
2194 ucontrol
->value
.integer
.value
[0] =
2195 ((signed char)(val
& 0xff))-min
;
2196 ucontrol
->value
.integer
.value
[1] =
2197 ((signed char)((val
>> 8) & 0xff))-min
;
2200 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8
);
2203 * snd_soc_put_volsw_sgn - signed mixer put callback
2204 * @kcontrol: mixer control
2205 * @ucontrol: control element information
2207 * Callback to set the value of a signed mixer control.
2209 * Returns 0 for success.
2211 int snd_soc_put_volsw_s8(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
;
2221 val
= (ucontrol
->value
.integer
.value
[0]+min
) & 0xff;
2222 val
|= ((ucontrol
->value
.integer
.value
[1]+min
) & 0xff) << 8;
2224 return snd_soc_update_bits_locked(codec
, reg
, 0xffff, val
);
2226 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8
);
2229 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2231 * @clk_id: DAI specific clock ID
2232 * @freq: new clock frequency in Hz
2233 * @dir: new clock direction - input/output.
2235 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2237 int snd_soc_dai_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
2238 unsigned int freq
, int dir
)
2240 if (dai
->ops
&& dai
->ops
->set_sysclk
)
2241 return dai
->ops
->set_sysclk(dai
, clk_id
, freq
, dir
);
2245 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk
);
2248 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2250 * @div_id: DAI specific clock divider ID
2251 * @div: new clock divisor.
2253 * Configures the clock dividers. This is used to derive the best DAI bit and
2254 * frame clocks from the system or master clock. It's best to set the DAI bit
2255 * and frame clocks as low as possible to save system power.
2257 int snd_soc_dai_set_clkdiv(struct snd_soc_dai
*dai
,
2258 int div_id
, int div
)
2260 if (dai
->ops
&& dai
->ops
->set_clkdiv
)
2261 return dai
->ops
->set_clkdiv(dai
, div_id
, div
);
2265 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv
);
2268 * snd_soc_dai_set_pll - configure DAI PLL.
2270 * @pll_id: DAI specific PLL ID
2271 * @source: DAI specific source for the PLL
2272 * @freq_in: PLL input clock frequency in Hz
2273 * @freq_out: requested PLL output clock frequency in Hz
2275 * Configures and enables PLL to generate output clock based on input clock.
2277 int snd_soc_dai_set_pll(struct snd_soc_dai
*dai
, int pll_id
, int source
,
2278 unsigned int freq_in
, unsigned int freq_out
)
2280 if (dai
->ops
&& dai
->ops
->set_pll
)
2281 return dai
->ops
->set_pll(dai
, pll_id
, source
,
2286 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll
);
2289 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2291 * @fmt: SND_SOC_DAIFMT_ format value.
2293 * Configures the DAI hardware format and clocking.
2295 int snd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
2297 if (dai
->ops
&& dai
->ops
->set_fmt
)
2298 return dai
->ops
->set_fmt(dai
, fmt
);
2302 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt
);
2305 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2307 * @tx_mask: bitmask representing active TX slots.
2308 * @rx_mask: bitmask representing active RX slots.
2309 * @slots: Number of slots in use.
2310 * @slot_width: Width in bits for each slot.
2312 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2315 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai
*dai
,
2316 unsigned int tx_mask
, unsigned int rx_mask
, int slots
, int slot_width
)
2318 if (dai
->ops
&& dai
->ops
->set_tdm_slot
)
2319 return dai
->ops
->set_tdm_slot(dai
, tx_mask
, rx_mask
,
2324 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot
);
2327 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2329 * @tx_num: how many TX channels
2330 * @tx_slot: pointer to an array which imply the TX slot number channel
2332 * @rx_num: how many RX channels
2333 * @rx_slot: pointer to an array which imply the RX slot number channel
2336 * configure the relationship between channel number and TDM slot number.
2338 int snd_soc_dai_set_channel_map(struct snd_soc_dai
*dai
,
2339 unsigned int tx_num
, unsigned int *tx_slot
,
2340 unsigned int rx_num
, unsigned int *rx_slot
)
2342 if (dai
->ops
&& dai
->ops
->set_channel_map
)
2343 return dai
->ops
->set_channel_map(dai
, tx_num
, tx_slot
,
2348 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map
);
2351 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2353 * @tristate: tristate enable
2355 * Tristates the DAI so that others can use it.
2357 int snd_soc_dai_set_tristate(struct snd_soc_dai
*dai
, int tristate
)
2359 if (dai
->ops
&& dai
->ops
->set_tristate
)
2360 return dai
->ops
->set_tristate(dai
, tristate
);
2364 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate
);
2367 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2369 * @mute: mute enable
2371 * Mutes the DAI DAC.
2373 int snd_soc_dai_digital_mute(struct snd_soc_dai
*dai
, int mute
)
2375 if (dai
->ops
&& dai
->ops
->digital_mute
)
2376 return dai
->ops
->digital_mute(dai
, mute
);
2380 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute
);
2383 * snd_soc_register_card - Register a card with the ASoC core
2385 * @card: Card to register
2387 * Note that currently this is an internal only function: it will be
2388 * exposed to machine drivers after further backporting of ASoC v2
2389 * registration APIs.
2391 static int snd_soc_register_card(struct snd_soc_card
*card
)
2393 if (!card
->name
|| !card
->dev
)
2396 INIT_LIST_HEAD(&card
->list
);
2397 card
->instantiated
= 0;
2399 mutex_lock(&client_mutex
);
2400 list_add(&card
->list
, &card_list
);
2401 snd_soc_instantiate_cards();
2402 mutex_unlock(&client_mutex
);
2404 dev_dbg(card
->dev
, "Registered card '%s'\n", card
->name
);
2410 * snd_soc_unregister_card - Unregister a card with the ASoC core
2412 * @card: Card to unregister
2414 * Note that currently this is an internal only function: it will be
2415 * exposed to machine drivers after further backporting of ASoC v2
2416 * registration APIs.
2418 static int snd_soc_unregister_card(struct snd_soc_card
*card
)
2420 mutex_lock(&client_mutex
);
2421 list_del(&card
->list
);
2422 mutex_unlock(&client_mutex
);
2424 dev_dbg(card
->dev
, "Unregistered card '%s'\n", card
->name
);
2430 * snd_soc_register_dai - Register a DAI with the ASoC core
2432 * @dai: DAI to register
2434 int snd_soc_register_dai(struct snd_soc_dai
*dai
)
2439 /* The device should become mandatory over time */
2441 printk(KERN_WARNING
"No device for DAI %s\n", dai
->name
);
2444 dai
->ops
= &null_dai_ops
;
2446 INIT_LIST_HEAD(&dai
->list
);
2448 mutex_lock(&client_mutex
);
2449 list_add(&dai
->list
, &dai_list
);
2450 snd_soc_instantiate_cards();
2451 mutex_unlock(&client_mutex
);
2453 pr_debug("Registered DAI '%s'\n", dai
->name
);
2457 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2460 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2462 * @dai: DAI to unregister
2464 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2466 mutex_lock(&client_mutex
);
2467 list_del(&dai
->list
);
2468 mutex_unlock(&client_mutex
);
2470 pr_debug("Unregistered DAI '%s'\n", dai
->name
);
2472 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2475 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2477 * @dai: Array of DAIs to register
2478 * @count: Number of DAIs
2480 int snd_soc_register_dais(struct snd_soc_dai
*dai
, size_t count
)
2484 for (i
= 0; i
< count
; i
++) {
2485 ret
= snd_soc_register_dai(&dai
[i
]);
2493 for (i
--; i
>= 0; i
--)
2494 snd_soc_unregister_dai(&dai
[i
]);
2498 EXPORT_SYMBOL_GPL(snd_soc_register_dais
);
2501 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2503 * @dai: Array of DAIs to unregister
2504 * @count: Number of DAIs
2506 void snd_soc_unregister_dais(struct snd_soc_dai
*dai
, size_t count
)
2510 for (i
= 0; i
< count
; i
++)
2511 snd_soc_unregister_dai(&dai
[i
]);
2513 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais
);
2516 * snd_soc_register_platform - Register a platform with the ASoC core
2518 * @platform: platform to register
2520 int snd_soc_register_platform(struct snd_soc_platform
*platform
)
2522 if (!platform
->name
)
2525 INIT_LIST_HEAD(&platform
->list
);
2527 mutex_lock(&client_mutex
);
2528 list_add(&platform
->list
, &platform_list
);
2529 snd_soc_instantiate_cards();
2530 mutex_unlock(&client_mutex
);
2532 pr_debug("Registered platform '%s'\n", platform
->name
);
2536 EXPORT_SYMBOL_GPL(snd_soc_register_platform
);
2539 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2541 * @platform: platform to unregister
2543 void snd_soc_unregister_platform(struct snd_soc_platform
*platform
)
2545 mutex_lock(&client_mutex
);
2546 list_del(&platform
->list
);
2547 mutex_unlock(&client_mutex
);
2549 pr_debug("Unregistered platform '%s'\n", platform
->name
);
2551 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform
);
2553 static u64 codec_format_map
[] = {
2554 SNDRV_PCM_FMTBIT_S16_LE
| SNDRV_PCM_FMTBIT_S16_BE
,
2555 SNDRV_PCM_FMTBIT_U16_LE
| SNDRV_PCM_FMTBIT_U16_BE
,
2556 SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S24_BE
,
2557 SNDRV_PCM_FMTBIT_U24_LE
| SNDRV_PCM_FMTBIT_U24_BE
,
2558 SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S32_BE
,
2559 SNDRV_PCM_FMTBIT_U32_LE
| SNDRV_PCM_FMTBIT_U32_BE
,
2560 SNDRV_PCM_FMTBIT_S24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2561 SNDRV_PCM_FMTBIT_U24_3LE
| SNDRV_PCM_FMTBIT_U24_3BE
,
2562 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S20_3BE
,
2563 SNDRV_PCM_FMTBIT_U20_3LE
| SNDRV_PCM_FMTBIT_U20_3BE
,
2564 SNDRV_PCM_FMTBIT_S18_3LE
| SNDRV_PCM_FMTBIT_S18_3BE
,
2565 SNDRV_PCM_FMTBIT_U18_3LE
| SNDRV_PCM_FMTBIT_U18_3BE
,
2566 SNDRV_PCM_FMTBIT_FLOAT_LE
| SNDRV_PCM_FMTBIT_FLOAT_BE
,
2567 SNDRV_PCM_FMTBIT_FLOAT64_LE
| SNDRV_PCM_FMTBIT_FLOAT64_BE
,
2568 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2569 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
,
2572 /* Fix up the DAI formats for endianness: codecs don't actually see
2573 * the endianness of the data but we're using the CPU format
2574 * definitions which do need to include endianness so we ensure that
2575 * codec DAIs always have both big and little endian variants set.
2577 static void fixup_codec_formats(struct snd_soc_pcm_stream
*stream
)
2581 for (i
= 0; i
< ARRAY_SIZE(codec_format_map
); i
++)
2582 if (stream
->formats
& codec_format_map
[i
])
2583 stream
->formats
|= codec_format_map
[i
];
2587 * snd_soc_register_codec - Register a codec with the ASoC core
2589 * @codec: codec to register
2591 int snd_soc_register_codec(struct snd_soc_codec
*codec
)
2598 /* The device should become mandatory over time */
2600 printk(KERN_WARNING
"No device for codec %s\n", codec
->name
);
2602 INIT_LIST_HEAD(&codec
->list
);
2604 for (i
= 0; i
< codec
->num_dai
; i
++) {
2605 fixup_codec_formats(&codec
->dai
[i
].playback
);
2606 fixup_codec_formats(&codec
->dai
[i
].capture
);
2609 mutex_lock(&client_mutex
);
2610 list_add(&codec
->list
, &codec_list
);
2611 snd_soc_instantiate_cards();
2612 mutex_unlock(&client_mutex
);
2614 pr_debug("Registered codec '%s'\n", codec
->name
);
2618 EXPORT_SYMBOL_GPL(snd_soc_register_codec
);
2621 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2623 * @codec: codec to unregister
2625 void snd_soc_unregister_codec(struct snd_soc_codec
*codec
)
2627 mutex_lock(&client_mutex
);
2628 list_del(&codec
->list
);
2629 mutex_unlock(&client_mutex
);
2631 pr_debug("Unregistered codec '%s'\n", codec
->name
);
2633 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec
);
2635 static int __init
snd_soc_init(void)
2637 #ifdef CONFIG_DEBUG_FS
2638 debugfs_root
= debugfs_create_dir("asoc", NULL
);
2639 if (IS_ERR(debugfs_root
) || !debugfs_root
) {
2641 "ASoC: Failed to create debugfs directory\n");
2642 debugfs_root
= NULL
;
2646 return platform_driver_register(&soc_driver
);
2649 static void __exit
snd_soc_exit(void)
2651 #ifdef CONFIG_DEBUG_FS
2652 debugfs_remove_recursive(debugfs_root
);
2654 platform_driver_unregister(&soc_driver
);
2657 module_init(snd_soc_init
);
2658 module_exit(snd_soc_exit
);
2660 /* Module information */
2661 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2662 MODULE_DESCRIPTION("ALSA SoC Core");
2663 MODULE_LICENSE("GPL");
2664 MODULE_ALIAS("platform:soc-audio");