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ASoC: Add sysfs entries via static attribute groups
[deliverable/linux.git] / sound / soc / soc-core.c
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1/*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/bitops.h>
31#include <linux/debugfs.h>
32#include <linux/platform_device.h>
33#include <linux/pinctrl/consumer.h>
34#include <linux/ctype.h>
35#include <linux/slab.h>
36#include <linux/of.h>
37#include <sound/core.h>
38#include <sound/jack.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include <sound/soc.h>
42#include <sound/soc-dpcm.h>
43#include <sound/initval.h>
44
45#define CREATE_TRACE_POINTS
46#include <trace/events/asoc.h>
47
48#define NAME_SIZE 32
49
50#ifdef CONFIG_DEBUG_FS
51struct dentry *snd_soc_debugfs_root;
52EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53#endif
54
55static DEFINE_MUTEX(client_mutex);
56static LIST_HEAD(platform_list);
57static LIST_HEAD(codec_list);
58static LIST_HEAD(component_list);
59
60/*
61 * This is a timeout to do a DAPM powerdown after a stream is closed().
62 * It can be used to eliminate pops between different playback streams, e.g.
63 * between two audio tracks.
64 */
65static int pmdown_time = 5000;
66module_param(pmdown_time, int, 0);
67MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
68
69/* returns the minimum number of bytes needed to represent
70 * a particular given value */
71static int min_bytes_needed(unsigned long val)
72{
73 int c = 0;
74 int i;
75
76 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
77 if (val & (1UL << i))
78 break;
79 c = (sizeof val * 8) - c;
80 if (!c || (c % 8))
81 c = (c + 8) / 8;
82 else
83 c /= 8;
84 return c;
85}
86
87/* fill buf which is 'len' bytes with a formatted
88 * string of the form 'reg: value\n' */
89static int format_register_str(struct snd_soc_codec *codec,
90 unsigned int reg, char *buf, size_t len)
91{
92 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
93 int regsize = codec->driver->reg_word_size * 2;
94 int ret;
95 char tmpbuf[len + 1];
96 char regbuf[regsize + 1];
97
98 /* since tmpbuf is allocated on the stack, warn the callers if they
99 * try to abuse this function */
100 WARN_ON(len > 63);
101
102 /* +2 for ': ' and + 1 for '\n' */
103 if (wordsize + regsize + 2 + 1 != len)
104 return -EINVAL;
105
106 ret = snd_soc_read(codec, reg);
107 if (ret < 0) {
108 memset(regbuf, 'X', regsize);
109 regbuf[regsize] = '\0';
110 } else {
111 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
112 }
113
114 /* prepare the buffer */
115 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
116 /* copy it back to the caller without the '\0' */
117 memcpy(buf, tmpbuf, len);
118
119 return 0;
120}
121
122/* codec register dump */
123static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
124 size_t count, loff_t pos)
125{
126 int i, step = 1;
127 int wordsize, regsize;
128 int len;
129 size_t total = 0;
130 loff_t p = 0;
131
132 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
133 regsize = codec->driver->reg_word_size * 2;
134
135 len = wordsize + regsize + 2 + 1;
136
137 if (!codec->driver->reg_cache_size)
138 return 0;
139
140 if (codec->driver->reg_cache_step)
141 step = codec->driver->reg_cache_step;
142
143 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
144 /* only support larger than PAGE_SIZE bytes debugfs
145 * entries for the default case */
146 if (p >= pos) {
147 if (total + len >= count - 1)
148 break;
149 format_register_str(codec, i, buf + total, len);
150 total += len;
151 }
152 p += len;
153 }
154
155 total = min(total, count - 1);
156
157 return total;
158}
159
160static ssize_t codec_reg_show(struct device *dev,
161 struct device_attribute *attr, char *buf)
162{
163 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
164
165 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
166}
167
168static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
169
170static ssize_t pmdown_time_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
172{
173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
174
175 return sprintf(buf, "%ld\n", rtd->pmdown_time);
176}
177
178static ssize_t pmdown_time_set(struct device *dev,
179 struct device_attribute *attr,
180 const char *buf, size_t count)
181{
182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
183 int ret;
184
185 ret = kstrtol(buf, 10, &rtd->pmdown_time);
186 if (ret)
187 return ret;
188
189 return count;
190}
191
192static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
193
194static struct attribute *soc_dev_attrs[] = {
195 &dev_attr_codec_reg.attr,
196 &dev_attr_pmdown_time.attr,
197 NULL
198};
199
200static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
201 struct attribute *attr, int idx)
202{
203 struct device *dev = kobj_to_dev(kobj);
204 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
205
206 if (attr == &dev_attr_pmdown_time.attr)
207 return attr->mode; /* always visible */
208 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
209}
210
211static const struct attribute_group soc_dapm_dev_group = {
212 .attrs = soc_dapm_dev_attrs,
213 .is_visible = soc_dev_attr_is_visible,
214};
215
216static const struct attribute_group soc_dev_roup = {
217 .attrs = soc_dev_attrs,
218 .is_visible = soc_dev_attr_is_visible,
219};
220
221static const struct attribute_group *soc_dev_attr_groups[] = {
222 &soc_dapm_dev_group,
223 &soc_dev_roup,
224 NULL
225};
226
227#ifdef CONFIG_DEBUG_FS
228static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
229 size_t count, loff_t *ppos)
230{
231 ssize_t ret;
232 struct snd_soc_codec *codec = file->private_data;
233 char *buf;
234
235 if (*ppos < 0 || !count)
236 return -EINVAL;
237
238 buf = kmalloc(count, GFP_KERNEL);
239 if (!buf)
240 return -ENOMEM;
241
242 ret = soc_codec_reg_show(codec, buf, count, *ppos);
243 if (ret >= 0) {
244 if (copy_to_user(user_buf, buf, ret)) {
245 kfree(buf);
246 return -EFAULT;
247 }
248 *ppos += ret;
249 }
250
251 kfree(buf);
252 return ret;
253}
254
255static ssize_t codec_reg_write_file(struct file *file,
256 const char __user *user_buf, size_t count, loff_t *ppos)
257{
258 char buf[32];
259 size_t buf_size;
260 char *start = buf;
261 unsigned long reg, value;
262 struct snd_soc_codec *codec = file->private_data;
263 int ret;
264
265 buf_size = min(count, (sizeof(buf)-1));
266 if (copy_from_user(buf, user_buf, buf_size))
267 return -EFAULT;
268 buf[buf_size] = 0;
269
270 while (*start == ' ')
271 start++;
272 reg = simple_strtoul(start, &start, 16);
273 while (*start == ' ')
274 start++;
275 ret = kstrtoul(start, 16, &value);
276 if (ret)
277 return ret;
278
279 /* Userspace has been fiddling around behind the kernel's back */
280 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
281
282 snd_soc_write(codec, reg, value);
283 return buf_size;
284}
285
286static const struct file_operations codec_reg_fops = {
287 .open = simple_open,
288 .read = codec_reg_read_file,
289 .write = codec_reg_write_file,
290 .llseek = default_llseek,
291};
292
293static void soc_init_component_debugfs(struct snd_soc_component *component)
294{
295 if (component->debugfs_prefix) {
296 char *name;
297
298 name = kasprintf(GFP_KERNEL, "%s:%s",
299 component->debugfs_prefix, component->name);
300 if (name) {
301 component->debugfs_root = debugfs_create_dir(name,
302 component->card->debugfs_card_root);
303 kfree(name);
304 }
305 } else {
306 component->debugfs_root = debugfs_create_dir(component->name,
307 component->card->debugfs_card_root);
308 }
309
310 if (!component->debugfs_root) {
311 dev_warn(component->dev,
312 "ASoC: Failed to create component debugfs directory\n");
313 return;
314 }
315
316 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
317 component->debugfs_root);
318
319 if (component->init_debugfs)
320 component->init_debugfs(component);
321}
322
323static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
324{
325 debugfs_remove_recursive(component->debugfs_root);
326}
327
328static void soc_init_codec_debugfs(struct snd_soc_component *component)
329{
330 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
331
332 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
333 codec->component.debugfs_root,
334 codec, &codec_reg_fops);
335 if (!codec->debugfs_reg)
336 dev_warn(codec->dev,
337 "ASoC: Failed to create codec register debugfs file\n");
338}
339
340static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
341 size_t count, loff_t *ppos)
342{
343 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
344 ssize_t len, ret = 0;
345 struct snd_soc_codec *codec;
346
347 if (!buf)
348 return -ENOMEM;
349
350 list_for_each_entry(codec, &codec_list, list) {
351 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
352 codec->component.name);
353 if (len >= 0)
354 ret += len;
355 if (ret > PAGE_SIZE) {
356 ret = PAGE_SIZE;
357 break;
358 }
359 }
360
361 if (ret >= 0)
362 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
363
364 kfree(buf);
365
366 return ret;
367}
368
369static const struct file_operations codec_list_fops = {
370 .read = codec_list_read_file,
371 .llseek = default_llseek,/* read accesses f_pos */
372};
373
374static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
375 size_t count, loff_t *ppos)
376{
377 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
378 ssize_t len, ret = 0;
379 struct snd_soc_component *component;
380 struct snd_soc_dai *dai;
381
382 if (!buf)
383 return -ENOMEM;
384
385 list_for_each_entry(component, &component_list, list) {
386 list_for_each_entry(dai, &component->dai_list, list) {
387 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
388 dai->name);
389 if (len >= 0)
390 ret += len;
391 if (ret > PAGE_SIZE) {
392 ret = PAGE_SIZE;
393 break;
394 }
395 }
396 }
397
398 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
399
400 kfree(buf);
401
402 return ret;
403}
404
405static const struct file_operations dai_list_fops = {
406 .read = dai_list_read_file,
407 .llseek = default_llseek,/* read accesses f_pos */
408};
409
410static ssize_t platform_list_read_file(struct file *file,
411 char __user *user_buf,
412 size_t count, loff_t *ppos)
413{
414 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
415 ssize_t len, ret = 0;
416 struct snd_soc_platform *platform;
417
418 if (!buf)
419 return -ENOMEM;
420
421 list_for_each_entry(platform, &platform_list, list) {
422 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
423 platform->component.name);
424 if (len >= 0)
425 ret += len;
426 if (ret > PAGE_SIZE) {
427 ret = PAGE_SIZE;
428 break;
429 }
430 }
431
432 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
433
434 kfree(buf);
435
436 return ret;
437}
438
439static const struct file_operations platform_list_fops = {
440 .read = platform_list_read_file,
441 .llseek = default_llseek,/* read accesses f_pos */
442};
443
444static void soc_init_card_debugfs(struct snd_soc_card *card)
445{
446 card->debugfs_card_root = debugfs_create_dir(card->name,
447 snd_soc_debugfs_root);
448 if (!card->debugfs_card_root) {
449 dev_warn(card->dev,
450 "ASoC: Failed to create card debugfs directory\n");
451 return;
452 }
453
454 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
455 card->debugfs_card_root,
456 &card->pop_time);
457 if (!card->debugfs_pop_time)
458 dev_warn(card->dev,
459 "ASoC: Failed to create pop time debugfs file\n");
460}
461
462static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
463{
464 debugfs_remove_recursive(card->debugfs_card_root);
465}
466
467#else
468
469#define soc_init_codec_debugfs NULL
470
471static inline void soc_init_component_debugfs(
472 struct snd_soc_component *component)
473{
474}
475
476static inline void soc_cleanup_component_debugfs(
477 struct snd_soc_component *component)
478{
479}
480
481static inline void soc_init_card_debugfs(struct snd_soc_card *card)
482{
483}
484
485static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
486{
487}
488#endif
489
490struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
491 const char *dai_link, int stream)
492{
493 int i;
494
495 for (i = 0; i < card->num_links; i++) {
496 if (card->rtd[i].dai_link->no_pcm &&
497 !strcmp(card->rtd[i].dai_link->name, dai_link))
498 return card->rtd[i].pcm->streams[stream].substream;
499 }
500 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
501 return NULL;
502}
503EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
504
505struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
506 const char *dai_link)
507{
508 int i;
509
510 for (i = 0; i < card->num_links; i++) {
511 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
512 return &card->rtd[i];
513 }
514 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
515 return NULL;
516}
517EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
518
519static void codec2codec_close_delayed_work(struct work_struct *work)
520{
521 /* Currently nothing to do for c2c links
522 * Since c2c links are internal nodes in the DAPM graph and
523 * don't interface with the outside world or application layer
524 * we don't have to do any special handling on close.
525 */
526}
527
528#ifdef CONFIG_PM_SLEEP
529/* powers down audio subsystem for suspend */
530int snd_soc_suspend(struct device *dev)
531{
532 struct snd_soc_card *card = dev_get_drvdata(dev);
533 struct snd_soc_codec *codec;
534 int i, j;
535
536 /* If the card is not initialized yet there is nothing to do */
537 if (!card->instantiated)
538 return 0;
539
540 /* Due to the resume being scheduled into a workqueue we could
541 * suspend before that's finished - wait for it to complete.
542 */
543 snd_power_lock(card->snd_card);
544 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
545 snd_power_unlock(card->snd_card);
546
547 /* we're going to block userspace touching us until resume completes */
548 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
549
550 /* mute any active DACs */
551 for (i = 0; i < card->num_rtd; i++) {
552
553 if (card->rtd[i].dai_link->ignore_suspend)
554 continue;
555
556 for (j = 0; j < card->rtd[i].num_codecs; j++) {
557 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
558 struct snd_soc_dai_driver *drv = dai->driver;
559
560 if (drv->ops->digital_mute && dai->playback_active)
561 drv->ops->digital_mute(dai, 1);
562 }
563 }
564
565 /* suspend all pcms */
566 for (i = 0; i < card->num_rtd; i++) {
567 if (card->rtd[i].dai_link->ignore_suspend)
568 continue;
569
570 snd_pcm_suspend_all(card->rtd[i].pcm);
571 }
572
573 if (card->suspend_pre)
574 card->suspend_pre(card);
575
576 for (i = 0; i < card->num_rtd; i++) {
577 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
578
579 if (card->rtd[i].dai_link->ignore_suspend)
580 continue;
581
582 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
583 cpu_dai->driver->suspend(cpu_dai);
584 }
585
586 /* close any waiting streams and save state */
587 for (i = 0; i < card->num_rtd; i++) {
588 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
589 flush_delayed_work(&card->rtd[i].delayed_work);
590 for (j = 0; j < card->rtd[i].num_codecs; j++) {
591 codec_dais[j]->codec->dapm.suspend_bias_level =
592 codec_dais[j]->codec->dapm.bias_level;
593 }
594 }
595
596 for (i = 0; i < card->num_rtd; i++) {
597
598 if (card->rtd[i].dai_link->ignore_suspend)
599 continue;
600
601 snd_soc_dapm_stream_event(&card->rtd[i],
602 SNDRV_PCM_STREAM_PLAYBACK,
603 SND_SOC_DAPM_STREAM_SUSPEND);
604
605 snd_soc_dapm_stream_event(&card->rtd[i],
606 SNDRV_PCM_STREAM_CAPTURE,
607 SND_SOC_DAPM_STREAM_SUSPEND);
608 }
609
610 /* Recheck all endpoints too, their state is affected by suspend */
611 dapm_mark_endpoints_dirty(card);
612 snd_soc_dapm_sync(&card->dapm);
613
614 /* suspend all CODECs */
615 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
616 /* If there are paths active then the CODEC will be held with
617 * bias _ON and should not be suspended. */
618 if (!codec->suspended) {
619 switch (codec->dapm.bias_level) {
620 case SND_SOC_BIAS_STANDBY:
621 /*
622 * If the CODEC is capable of idle
623 * bias off then being in STANDBY
624 * means it's doing something,
625 * otherwise fall through.
626 */
627 if (codec->dapm.idle_bias_off) {
628 dev_dbg(codec->dev,
629 "ASoC: idle_bias_off CODEC on over suspend\n");
630 break;
631 }
632
633 case SND_SOC_BIAS_OFF:
634 if (codec->driver->suspend)
635 codec->driver->suspend(codec);
636 codec->suspended = 1;
637 if (codec->component.regmap)
638 regcache_mark_dirty(codec->component.regmap);
639 /* deactivate pins to sleep state */
640 pinctrl_pm_select_sleep_state(codec->dev);
641 break;
642 default:
643 dev_dbg(codec->dev,
644 "ASoC: CODEC is on over suspend\n");
645 break;
646 }
647 }
648 }
649
650 for (i = 0; i < card->num_rtd; i++) {
651 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
652
653 if (card->rtd[i].dai_link->ignore_suspend)
654 continue;
655
656 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
657 cpu_dai->driver->suspend(cpu_dai);
658
659 /* deactivate pins to sleep state */
660 pinctrl_pm_select_sleep_state(cpu_dai->dev);
661 }
662
663 if (card->suspend_post)
664 card->suspend_post(card);
665
666 return 0;
667}
668EXPORT_SYMBOL_GPL(snd_soc_suspend);
669
670/* deferred resume work, so resume can complete before we finished
671 * setting our codec back up, which can be very slow on I2C
672 */
673static void soc_resume_deferred(struct work_struct *work)
674{
675 struct snd_soc_card *card =
676 container_of(work, struct snd_soc_card, deferred_resume_work);
677 struct snd_soc_codec *codec;
678 int i, j;
679
680 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
681 * so userspace apps are blocked from touching us
682 */
683
684 dev_dbg(card->dev, "ASoC: starting resume work\n");
685
686 /* Bring us up into D2 so that DAPM starts enabling things */
687 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
688
689 if (card->resume_pre)
690 card->resume_pre(card);
691
692 /* resume control bus DAIs */
693 for (i = 0; i < card->num_rtd; i++) {
694 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
695
696 if (card->rtd[i].dai_link->ignore_suspend)
697 continue;
698
699 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
700 cpu_dai->driver->resume(cpu_dai);
701 }
702
703 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
704 /* If the CODEC was idle over suspend then it will have been
705 * left with bias OFF or STANDBY and suspended so we must now
706 * resume. Otherwise the suspend was suppressed.
707 */
708 if (codec->suspended) {
709 switch (codec->dapm.bias_level) {
710 case SND_SOC_BIAS_STANDBY:
711 case SND_SOC_BIAS_OFF:
712 if (codec->driver->resume)
713 codec->driver->resume(codec);
714 codec->suspended = 0;
715 break;
716 default:
717 dev_dbg(codec->dev,
718 "ASoC: CODEC was on over suspend\n");
719 break;
720 }
721 }
722 }
723
724 for (i = 0; i < card->num_rtd; i++) {
725
726 if (card->rtd[i].dai_link->ignore_suspend)
727 continue;
728
729 snd_soc_dapm_stream_event(&card->rtd[i],
730 SNDRV_PCM_STREAM_PLAYBACK,
731 SND_SOC_DAPM_STREAM_RESUME);
732
733 snd_soc_dapm_stream_event(&card->rtd[i],
734 SNDRV_PCM_STREAM_CAPTURE,
735 SND_SOC_DAPM_STREAM_RESUME);
736 }
737
738 /* unmute any active DACs */
739 for (i = 0; i < card->num_rtd; i++) {
740
741 if (card->rtd[i].dai_link->ignore_suspend)
742 continue;
743
744 for (j = 0; j < card->rtd[i].num_codecs; j++) {
745 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
746 struct snd_soc_dai_driver *drv = dai->driver;
747
748 if (drv->ops->digital_mute && dai->playback_active)
749 drv->ops->digital_mute(dai, 0);
750 }
751 }
752
753 for (i = 0; i < card->num_rtd; i++) {
754 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
755
756 if (card->rtd[i].dai_link->ignore_suspend)
757 continue;
758
759 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
760 cpu_dai->driver->resume(cpu_dai);
761 }
762
763 if (card->resume_post)
764 card->resume_post(card);
765
766 dev_dbg(card->dev, "ASoC: resume work completed\n");
767
768 /* userspace can access us now we are back as we were before */
769 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
770
771 /* Recheck all endpoints too, their state is affected by suspend */
772 dapm_mark_endpoints_dirty(card);
773 snd_soc_dapm_sync(&card->dapm);
774}
775
776/* powers up audio subsystem after a suspend */
777int snd_soc_resume(struct device *dev)
778{
779 struct snd_soc_card *card = dev_get_drvdata(dev);
780 bool bus_control = false;
781 int i;
782
783 /* If the card is not initialized yet there is nothing to do */
784 if (!card->instantiated)
785 return 0;
786
787 /* activate pins from sleep state */
788 for (i = 0; i < card->num_rtd; i++) {
789 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
790 struct snd_soc_dai **codec_dais = rtd->codec_dais;
791 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
792 int j;
793
794 if (cpu_dai->active)
795 pinctrl_pm_select_default_state(cpu_dai->dev);
796
797 for (j = 0; j < rtd->num_codecs; j++) {
798 struct snd_soc_dai *codec_dai = codec_dais[j];
799 if (codec_dai->active)
800 pinctrl_pm_select_default_state(codec_dai->dev);
801 }
802 }
803
804 /*
805 * DAIs that also act as the control bus master might have other drivers
806 * hanging off them so need to resume immediately. Other drivers don't
807 * have that problem and may take a substantial amount of time to resume
808 * due to I/O costs and anti-pop so handle them out of line.
809 */
810 for (i = 0; i < card->num_rtd; i++) {
811 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
812 bus_control |= cpu_dai->driver->bus_control;
813 }
814 if (bus_control) {
815 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
816 soc_resume_deferred(&card->deferred_resume_work);
817 } else {
818 dev_dbg(dev, "ASoC: Scheduling resume work\n");
819 if (!schedule_work(&card->deferred_resume_work))
820 dev_err(dev, "ASoC: resume work item may be lost\n");
821 }
822
823 return 0;
824}
825EXPORT_SYMBOL_GPL(snd_soc_resume);
826#else
827#define snd_soc_suspend NULL
828#define snd_soc_resume NULL
829#endif
830
831static const struct snd_soc_dai_ops null_dai_ops = {
832};
833
834static struct snd_soc_component *soc_find_component(
835 const struct device_node *of_node, const char *name)
836{
837 struct snd_soc_component *component;
838
839 list_for_each_entry(component, &component_list, list) {
840 if (of_node) {
841 if (component->dev->of_node == of_node)
842 return component;
843 } else if (strcmp(component->name, name) == 0) {
844 return component;
845 }
846 }
847
848 return NULL;
849}
850
851static struct snd_soc_dai *snd_soc_find_dai(
852 const struct snd_soc_dai_link_component *dlc)
853{
854 struct snd_soc_component *component;
855 struct snd_soc_dai *dai;
856
857 /* Find CPU DAI from registered DAIs*/
858 list_for_each_entry(component, &component_list, list) {
859 if (dlc->of_node && component->dev->of_node != dlc->of_node)
860 continue;
861 if (dlc->name && strcmp(component->name, dlc->name))
862 continue;
863 list_for_each_entry(dai, &component->dai_list, list) {
864 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
865 continue;
866
867 return dai;
868 }
869 }
870
871 return NULL;
872}
873
874static int soc_bind_dai_link(struct snd_soc_card *card, int num)
875{
876 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
877 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
878 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
879 struct snd_soc_dai_link_component cpu_dai_component;
880 struct snd_soc_dai **codec_dais = rtd->codec_dais;
881 struct snd_soc_platform *platform;
882 const char *platform_name;
883 int i;
884
885 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
886
887 cpu_dai_component.name = dai_link->cpu_name;
888 cpu_dai_component.of_node = dai_link->cpu_of_node;
889 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
890 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
891 if (!rtd->cpu_dai) {
892 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
893 dai_link->cpu_dai_name);
894 return -EPROBE_DEFER;
895 }
896
897 rtd->num_codecs = dai_link->num_codecs;
898
899 /* Find CODEC from registered CODECs */
900 for (i = 0; i < rtd->num_codecs; i++) {
901 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
902 if (!codec_dais[i]) {
903 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
904 codecs[i].dai_name);
905 return -EPROBE_DEFER;
906 }
907 }
908
909 /* Single codec links expect codec and codec_dai in runtime data */
910 rtd->codec_dai = codec_dais[0];
911 rtd->codec = rtd->codec_dai->codec;
912
913 /* if there's no platform we match on the empty platform */
914 platform_name = dai_link->platform_name;
915 if (!platform_name && !dai_link->platform_of_node)
916 platform_name = "snd-soc-dummy";
917
918 /* find one from the set of registered platforms */
919 list_for_each_entry(platform, &platform_list, list) {
920 if (dai_link->platform_of_node) {
921 if (platform->dev->of_node !=
922 dai_link->platform_of_node)
923 continue;
924 } else {
925 if (strcmp(platform->component.name, platform_name))
926 continue;
927 }
928
929 rtd->platform = platform;
930 }
931 if (!rtd->platform) {
932 dev_err(card->dev, "ASoC: platform %s not registered\n",
933 dai_link->platform_name);
934 return -EPROBE_DEFER;
935 }
936
937 card->num_rtd++;
938
939 return 0;
940}
941
942static void soc_remove_component(struct snd_soc_component *component)
943{
944 if (!component->probed)
945 return;
946
947 /* This is a HACK and will be removed soon */
948 if (component->codec)
949 list_del(&component->codec->card_list);
950
951 if (component->remove)
952 component->remove(component);
953
954 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
955
956 soc_cleanup_component_debugfs(component);
957 component->probed = 0;
958 module_put(component->dev->driver->owner);
959}
960
961static void soc_remove_dai(struct snd_soc_dai *dai, int order)
962{
963 int err;
964
965 if (dai && dai->probed &&
966 dai->driver->remove_order == order) {
967 if (dai->driver->remove) {
968 err = dai->driver->remove(dai);
969 if (err < 0)
970 dev_err(dai->dev,
971 "ASoC: failed to remove %s: %d\n",
972 dai->name, err);
973 }
974 dai->probed = 0;
975 }
976}
977
978static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
979{
980 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
981 int i;
982
983 /* unregister the rtd device */
984 if (rtd->dev_registered) {
985 device_unregister(rtd->dev);
986 rtd->dev_registered = 0;
987 }
988
989 /* remove the CODEC DAI */
990 for (i = 0; i < rtd->num_codecs; i++)
991 soc_remove_dai(rtd->codec_dais[i], order);
992
993 soc_remove_dai(rtd->cpu_dai, order);
994}
995
996static void soc_remove_link_components(struct snd_soc_card *card, int num,
997 int order)
998{
999 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1000 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001 struct snd_soc_platform *platform = rtd->platform;
1002 struct snd_soc_component *component;
1003 int i;
1004
1005 /* remove the platform */
1006 if (platform && platform->component.driver->remove_order == order)
1007 soc_remove_component(&platform->component);
1008
1009 /* remove the CODEC-side CODEC */
1010 for (i = 0; i < rtd->num_codecs; i++) {
1011 component = rtd->codec_dais[i]->component;
1012 if (component->driver->remove_order == order)
1013 soc_remove_component(component);
1014 }
1015
1016 /* remove any CPU-side CODEC */
1017 if (cpu_dai) {
1018 if (cpu_dai->component->driver->remove_order == order)
1019 soc_remove_component(cpu_dai->component);
1020 }
1021}
1022
1023static void soc_remove_dai_links(struct snd_soc_card *card)
1024{
1025 int dai, order;
1026
1027 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1028 order++) {
1029 for (dai = 0; dai < card->num_rtd; dai++)
1030 soc_remove_link_dais(card, dai, order);
1031 }
1032
1033 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1034 order++) {
1035 for (dai = 0; dai < card->num_rtd; dai++)
1036 soc_remove_link_components(card, dai, order);
1037 }
1038
1039 card->num_rtd = 0;
1040}
1041
1042static void soc_set_name_prefix(struct snd_soc_card *card,
1043 struct snd_soc_component *component)
1044{
1045 int i;
1046
1047 if (card->codec_conf == NULL)
1048 return;
1049
1050 for (i = 0; i < card->num_configs; i++) {
1051 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1052 if (map->of_node && component->dev->of_node != map->of_node)
1053 continue;
1054 if (map->dev_name && strcmp(component->name, map->dev_name))
1055 continue;
1056 component->name_prefix = map->name_prefix;
1057 break;
1058 }
1059}
1060
1061static int soc_probe_component(struct snd_soc_card *card,
1062 struct snd_soc_component *component)
1063{
1064 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1065 struct snd_soc_dai *dai;
1066 int ret;
1067
1068 if (component->probed)
1069 return 0;
1070
1071 component->card = card;
1072 dapm->card = card;
1073 soc_set_name_prefix(card, component);
1074
1075 if (!try_module_get(component->dev->driver->owner))
1076 return -ENODEV;
1077
1078 soc_init_component_debugfs(component);
1079
1080 if (component->dapm_widgets) {
1081 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1082 component->num_dapm_widgets);
1083
1084 if (ret != 0) {
1085 dev_err(component->dev,
1086 "Failed to create new controls %d\n", ret);
1087 goto err_probe;
1088 }
1089 }
1090
1091 list_for_each_entry(dai, &component->dai_list, list) {
1092 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1093 if (ret != 0) {
1094 dev_err(component->dev,
1095 "Failed to create DAI widgets %d\n", ret);
1096 goto err_probe;
1097 }
1098 }
1099
1100 if (component->probe) {
1101 ret = component->probe(component);
1102 if (ret < 0) {
1103 dev_err(component->dev,
1104 "ASoC: failed to probe component %d\n", ret);
1105 goto err_probe;
1106 }
1107
1108 WARN(dapm->idle_bias_off &&
1109 dapm->bias_level != SND_SOC_BIAS_OFF,
1110 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1111 component->name);
1112 }
1113
1114 if (component->controls)
1115 snd_soc_add_component_controls(component, component->controls,
1116 component->num_controls);
1117 if (component->dapm_routes)
1118 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1119 component->num_dapm_routes);
1120
1121 component->probed = 1;
1122 list_add(&dapm->list, &card->dapm_list);
1123
1124 /* This is a HACK and will be removed soon */
1125 if (component->codec)
1126 list_add(&component->codec->card_list, &card->codec_dev_list);
1127
1128 return 0;
1129
1130err_probe:
1131 soc_cleanup_component_debugfs(component);
1132 module_put(component->dev->driver->owner);
1133
1134 return ret;
1135}
1136
1137static void rtd_release(struct device *dev)
1138{
1139 kfree(dev);
1140}
1141
1142static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1143 const char *name)
1144{
1145 int ret = 0;
1146
1147 /* register the rtd device */
1148 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1149 if (!rtd->dev)
1150 return -ENOMEM;
1151 device_initialize(rtd->dev);
1152 rtd->dev->parent = rtd->card->dev;
1153 rtd->dev->release = rtd_release;
1154 rtd->dev->groups = soc_dev_attr_groups;
1155 dev_set_name(rtd->dev, "%s", name);
1156 dev_set_drvdata(rtd->dev, rtd);
1157 mutex_init(&rtd->pcm_mutex);
1158 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1159 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1160 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1161 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1162 ret = device_add(rtd->dev);
1163 if (ret < 0) {
1164 /* calling put_device() here to free the rtd->dev */
1165 put_device(rtd->dev);
1166 dev_err(rtd->card->dev,
1167 "ASoC: failed to register runtime device: %d\n", ret);
1168 return ret;
1169 }
1170 rtd->dev_registered = 1;
1171 return 0;
1172}
1173
1174static int soc_probe_link_components(struct snd_soc_card *card, int num,
1175 int order)
1176{
1177 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1178 struct snd_soc_platform *platform = rtd->platform;
1179 struct snd_soc_component *component;
1180 int i, ret;
1181
1182 /* probe the CPU-side component, if it is a CODEC */
1183 component = rtd->cpu_dai->component;
1184 if (component->driver->probe_order == order) {
1185 ret = soc_probe_component(card, component);
1186 if (ret < 0)
1187 return ret;
1188 }
1189
1190 /* probe the CODEC-side components */
1191 for (i = 0; i < rtd->num_codecs; i++) {
1192 component = rtd->codec_dais[i]->component;
1193 if (component->driver->probe_order == order) {
1194 ret = soc_probe_component(card, component);
1195 if (ret < 0)
1196 return ret;
1197 }
1198 }
1199
1200 /* probe the platform */
1201 if (platform->component.driver->probe_order == order) {
1202 ret = soc_probe_component(card, &platform->component);
1203 if (ret < 0)
1204 return ret;
1205 }
1206
1207 return 0;
1208}
1209
1210static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1211{
1212 int ret;
1213
1214 if (!dai->probed && dai->driver->probe_order == order) {
1215 if (dai->driver->probe) {
1216 ret = dai->driver->probe(dai);
1217 if (ret < 0) {
1218 dev_err(dai->dev,
1219 "ASoC: failed to probe DAI %s: %d\n",
1220 dai->name, ret);
1221 return ret;
1222 }
1223 }
1224
1225 dai->probed = 1;
1226 }
1227
1228 return 0;
1229}
1230
1231static int soc_link_dai_widgets(struct snd_soc_card *card,
1232 struct snd_soc_dai_link *dai_link,
1233 struct snd_soc_pcm_runtime *rtd)
1234{
1235 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1236 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1237 struct snd_soc_dapm_widget *play_w, *capture_w;
1238 int ret;
1239
1240 if (rtd->num_codecs > 1)
1241 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1242
1243 /* link the DAI widgets */
1244 play_w = codec_dai->playback_widget;
1245 capture_w = cpu_dai->capture_widget;
1246 if (play_w && capture_w) {
1247 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1248 capture_w, play_w);
1249 if (ret != 0) {
1250 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1251 play_w->name, capture_w->name, ret);
1252 return ret;
1253 }
1254 }
1255
1256 play_w = cpu_dai->playback_widget;
1257 capture_w = codec_dai->capture_widget;
1258 if (play_w && capture_w) {
1259 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1260 capture_w, play_w);
1261 if (ret != 0) {
1262 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1263 play_w->name, capture_w->name, ret);
1264 return ret;
1265 }
1266 }
1267
1268 return 0;
1269}
1270
1271static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1272{
1273 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1274 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1275 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1276 int i, ret;
1277
1278 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1279 card->name, num, order);
1280
1281 /* set default power off timeout */
1282 rtd->pmdown_time = pmdown_time;
1283
1284 ret = soc_probe_dai(cpu_dai, order);
1285 if (ret)
1286 return ret;
1287
1288 /* probe the CODEC DAI */
1289 for (i = 0; i < rtd->num_codecs; i++) {
1290 ret = soc_probe_dai(rtd->codec_dais[i], order);
1291 if (ret)
1292 return ret;
1293 }
1294
1295 /* complete DAI probe during last probe */
1296 if (order != SND_SOC_COMP_ORDER_LAST)
1297 return 0;
1298
1299 /* do machine specific initialization */
1300 if (dai_link->init) {
1301 ret = dai_link->init(rtd);
1302 if (ret < 0) {
1303 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1304 dai_link->name, ret);
1305 return ret;
1306 }
1307 }
1308
1309 ret = soc_post_component_init(rtd, dai_link->name);
1310 if (ret)
1311 return ret;
1312
1313#ifdef CONFIG_DEBUG_FS
1314 /* add DPCM sysfs entries */
1315 if (dai_link->dynamic) {
1316 ret = soc_dpcm_debugfs_add(rtd);
1317 if (ret < 0) {
1318 dev_err(rtd->dev,
1319 "ASoC: failed to add dpcm sysfs entries: %d\n",
1320 ret);
1321 return ret;
1322 }
1323 }
1324#endif
1325
1326 if (cpu_dai->driver->compress_dai) {
1327 /*create compress_device"*/
1328 ret = soc_new_compress(rtd, num);
1329 if (ret < 0) {
1330 dev_err(card->dev, "ASoC: can't create compress %s\n",
1331 dai_link->stream_name);
1332 return ret;
1333 }
1334 } else {
1335
1336 if (!dai_link->params) {
1337 /* create the pcm */
1338 ret = soc_new_pcm(rtd, num);
1339 if (ret < 0) {
1340 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1341 dai_link->stream_name, ret);
1342 return ret;
1343 }
1344 } else {
1345 INIT_DELAYED_WORK(&rtd->delayed_work,
1346 codec2codec_close_delayed_work);
1347
1348 /* link the DAI widgets */
1349 ret = soc_link_dai_widgets(card, dai_link, rtd);
1350 if (ret)
1351 return ret;
1352 }
1353 }
1354
1355 return 0;
1356}
1357
1358static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1359{
1360 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1361 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1362 const char *name = aux_dev->codec_name;
1363
1364 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1365 if (!rtd->component) {
1366 if (aux_dev->codec_of_node)
1367 name = of_node_full_name(aux_dev->codec_of_node);
1368
1369 dev_err(card->dev, "ASoC: %s not registered\n", name);
1370 return -EPROBE_DEFER;
1371 }
1372
1373 /*
1374 * Some places still reference rtd->codec, so we have to keep that
1375 * initialized if the component is a CODEC. Once all those references
1376 * have been removed, this code can be removed as well.
1377 */
1378 rtd->codec = rtd->component->codec;
1379
1380 return 0;
1381}
1382
1383static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1384{
1385 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1386 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1387 int ret;
1388
1389 ret = soc_probe_component(card, rtd->component);
1390 if (ret < 0)
1391 return ret;
1392
1393 /* do machine specific initialization */
1394 if (aux_dev->init) {
1395 ret = aux_dev->init(rtd->component);
1396 if (ret < 0) {
1397 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1398 aux_dev->name, ret);
1399 return ret;
1400 }
1401 }
1402
1403 return soc_post_component_init(rtd, aux_dev->name);
1404}
1405
1406static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1407{
1408 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1409 struct snd_soc_component *component = rtd->component;
1410
1411 /* unregister the rtd device */
1412 if (rtd->dev_registered) {
1413 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1414 device_unregister(rtd->dev);
1415 rtd->dev_registered = 0;
1416 }
1417
1418 if (component && component->probed)
1419 soc_remove_component(component);
1420}
1421
1422static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1423{
1424 int ret;
1425
1426 if (codec->cache_init)
1427 return 0;
1428
1429 ret = snd_soc_cache_init(codec);
1430 if (ret < 0) {
1431 dev_err(codec->dev,
1432 "ASoC: Failed to set cache compression type: %d\n",
1433 ret);
1434 return ret;
1435 }
1436 codec->cache_init = 1;
1437 return 0;
1438}
1439
1440static int snd_soc_instantiate_card(struct snd_soc_card *card)
1441{
1442 struct snd_soc_codec *codec;
1443 struct snd_soc_dai_link *dai_link;
1444 int ret, i, order, dai_fmt;
1445
1446 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1447
1448 /* bind DAIs */
1449 for (i = 0; i < card->num_links; i++) {
1450 ret = soc_bind_dai_link(card, i);
1451 if (ret != 0)
1452 goto base_error;
1453 }
1454
1455 /* bind aux_devs too */
1456 for (i = 0; i < card->num_aux_devs; i++) {
1457 ret = soc_bind_aux_dev(card, i);
1458 if (ret != 0)
1459 goto base_error;
1460 }
1461
1462 /* initialize the register cache for each available codec */
1463 list_for_each_entry(codec, &codec_list, list) {
1464 if (codec->cache_init)
1465 continue;
1466 ret = snd_soc_init_codec_cache(codec);
1467 if (ret < 0)
1468 goto base_error;
1469 }
1470
1471 /* card bind complete so register a sound card */
1472 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1473 card->owner, 0, &card->snd_card);
1474 if (ret < 0) {
1475 dev_err(card->dev,
1476 "ASoC: can't create sound card for card %s: %d\n",
1477 card->name, ret);
1478 goto base_error;
1479 }
1480
1481 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1482 card->dapm.dev = card->dev;
1483 card->dapm.card = card;
1484 list_add(&card->dapm.list, &card->dapm_list);
1485
1486#ifdef CONFIG_DEBUG_FS
1487 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1488#endif
1489
1490#ifdef CONFIG_PM_SLEEP
1491 /* deferred resume work */
1492 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1493#endif
1494
1495 if (card->dapm_widgets)
1496 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1497 card->num_dapm_widgets);
1498
1499 /* initialise the sound card only once */
1500 if (card->probe) {
1501 ret = card->probe(card);
1502 if (ret < 0)
1503 goto card_probe_error;
1504 }
1505
1506 /* probe all components used by DAI links on this card */
1507 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1508 order++) {
1509 for (i = 0; i < card->num_links; i++) {
1510 ret = soc_probe_link_components(card, i, order);
1511 if (ret < 0) {
1512 dev_err(card->dev,
1513 "ASoC: failed to instantiate card %d\n",
1514 ret);
1515 goto probe_dai_err;
1516 }
1517 }
1518 }
1519
1520 /* probe all DAI links on this card */
1521 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1522 order++) {
1523 for (i = 0; i < card->num_links; i++) {
1524 ret = soc_probe_link_dais(card, i, order);
1525 if (ret < 0) {
1526 dev_err(card->dev,
1527 "ASoC: failed to instantiate card %d\n",
1528 ret);
1529 goto probe_dai_err;
1530 }
1531 }
1532 }
1533
1534 for (i = 0; i < card->num_aux_devs; i++) {
1535 ret = soc_probe_aux_dev(card, i);
1536 if (ret < 0) {
1537 dev_err(card->dev,
1538 "ASoC: failed to add auxiliary devices %d\n",
1539 ret);
1540 goto probe_aux_dev_err;
1541 }
1542 }
1543
1544 snd_soc_dapm_link_dai_widgets(card);
1545 snd_soc_dapm_connect_dai_link_widgets(card);
1546
1547 if (card->controls)
1548 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1549
1550 if (card->dapm_routes)
1551 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1552 card->num_dapm_routes);
1553
1554 for (i = 0; i < card->num_links; i++) {
1555 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1556 dai_link = &card->dai_link[i];
1557 dai_fmt = dai_link->dai_fmt;
1558
1559 if (dai_fmt) {
1560 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1561 int j;
1562
1563 for (j = 0; j < rtd->num_codecs; j++) {
1564 struct snd_soc_dai *codec_dai = codec_dais[j];
1565
1566 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1567 if (ret != 0 && ret != -ENOTSUPP)
1568 dev_warn(codec_dai->dev,
1569 "ASoC: Failed to set DAI format: %d\n",
1570 ret);
1571 }
1572 }
1573
1574 /* If this is a regular CPU link there will be a platform */
1575 if (dai_fmt &&
1576 (dai_link->platform_name || dai_link->platform_of_node)) {
1577 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1578 dai_fmt);
1579 if (ret != 0 && ret != -ENOTSUPP)
1580 dev_warn(card->rtd[i].cpu_dai->dev,
1581 "ASoC: Failed to set DAI format: %d\n",
1582 ret);
1583 } else if (dai_fmt) {
1584 /* Flip the polarity for the "CPU" end */
1585 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1586 switch (dai_link->dai_fmt &
1587 SND_SOC_DAIFMT_MASTER_MASK) {
1588 case SND_SOC_DAIFMT_CBM_CFM:
1589 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1590 break;
1591 case SND_SOC_DAIFMT_CBM_CFS:
1592 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1593 break;
1594 case SND_SOC_DAIFMT_CBS_CFM:
1595 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1596 break;
1597 case SND_SOC_DAIFMT_CBS_CFS:
1598 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1599 break;
1600 }
1601
1602 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1603 dai_fmt);
1604 if (ret != 0 && ret != -ENOTSUPP)
1605 dev_warn(card->rtd[i].cpu_dai->dev,
1606 "ASoC: Failed to set DAI format: %d\n",
1607 ret);
1608 }
1609 }
1610
1611 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1612 "%s", card->name);
1613 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1614 "%s", card->long_name ? card->long_name : card->name);
1615 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1616 "%s", card->driver_name ? card->driver_name : card->name);
1617 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1618 switch (card->snd_card->driver[i]) {
1619 case '_':
1620 case '-':
1621 case '\0':
1622 break;
1623 default:
1624 if (!isalnum(card->snd_card->driver[i]))
1625 card->snd_card->driver[i] = '_';
1626 break;
1627 }
1628 }
1629
1630 if (card->late_probe) {
1631 ret = card->late_probe(card);
1632 if (ret < 0) {
1633 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1634 card->name, ret);
1635 goto probe_aux_dev_err;
1636 }
1637 }
1638
1639 if (card->fully_routed)
1640 snd_soc_dapm_auto_nc_pins(card);
1641
1642 snd_soc_dapm_new_widgets(card);
1643
1644 ret = snd_card_register(card->snd_card);
1645 if (ret < 0) {
1646 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1647 ret);
1648 goto probe_aux_dev_err;
1649 }
1650
1651 card->instantiated = 1;
1652 snd_soc_dapm_sync(&card->dapm);
1653 mutex_unlock(&card->mutex);
1654
1655 return 0;
1656
1657probe_aux_dev_err:
1658 for (i = 0; i < card->num_aux_devs; i++)
1659 soc_remove_aux_dev(card, i);
1660
1661probe_dai_err:
1662 soc_remove_dai_links(card);
1663
1664card_probe_error:
1665 if (card->remove)
1666 card->remove(card);
1667
1668 snd_card_free(card->snd_card);
1669
1670base_error:
1671 mutex_unlock(&card->mutex);
1672
1673 return ret;
1674}
1675
1676/* probes a new socdev */
1677static int soc_probe(struct platform_device *pdev)
1678{
1679 struct snd_soc_card *card = platform_get_drvdata(pdev);
1680
1681 /*
1682 * no card, so machine driver should be registering card
1683 * we should not be here in that case so ret error
1684 */
1685 if (!card)
1686 return -EINVAL;
1687
1688 dev_warn(&pdev->dev,
1689 "ASoC: machine %s should use snd_soc_register_card()\n",
1690 card->name);
1691
1692 /* Bodge while we unpick instantiation */
1693 card->dev = &pdev->dev;
1694
1695 return snd_soc_register_card(card);
1696}
1697
1698static int soc_cleanup_card_resources(struct snd_soc_card *card)
1699{
1700 int i;
1701
1702 /* make sure any delayed work runs */
1703 for (i = 0; i < card->num_rtd; i++) {
1704 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1705 flush_delayed_work(&rtd->delayed_work);
1706 }
1707
1708 /* remove auxiliary devices */
1709 for (i = 0; i < card->num_aux_devs; i++)
1710 soc_remove_aux_dev(card, i);
1711
1712 /* remove and free each DAI */
1713 soc_remove_dai_links(card);
1714
1715 soc_cleanup_card_debugfs(card);
1716
1717 /* remove the card */
1718 if (card->remove)
1719 card->remove(card);
1720
1721 snd_soc_dapm_free(&card->dapm);
1722
1723 snd_card_free(card->snd_card);
1724 return 0;
1725
1726}
1727
1728/* removes a socdev */
1729static int soc_remove(struct platform_device *pdev)
1730{
1731 struct snd_soc_card *card = platform_get_drvdata(pdev);
1732
1733 snd_soc_unregister_card(card);
1734 return 0;
1735}
1736
1737int snd_soc_poweroff(struct device *dev)
1738{
1739 struct snd_soc_card *card = dev_get_drvdata(dev);
1740 int i;
1741
1742 if (!card->instantiated)
1743 return 0;
1744
1745 /* Flush out pmdown_time work - we actually do want to run it
1746 * now, we're shutting down so no imminent restart. */
1747 for (i = 0; i < card->num_rtd; i++) {
1748 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1749 flush_delayed_work(&rtd->delayed_work);
1750 }
1751
1752 snd_soc_dapm_shutdown(card);
1753
1754 /* deactivate pins to sleep state */
1755 for (i = 0; i < card->num_rtd; i++) {
1756 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1757 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1758 int j;
1759
1760 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1761 for (j = 0; j < rtd->num_codecs; j++) {
1762 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1763 pinctrl_pm_select_sleep_state(codec_dai->dev);
1764 }
1765 }
1766
1767 return 0;
1768}
1769EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1770
1771const struct dev_pm_ops snd_soc_pm_ops = {
1772 .suspend = snd_soc_suspend,
1773 .resume = snd_soc_resume,
1774 .freeze = snd_soc_suspend,
1775 .thaw = snd_soc_resume,
1776 .poweroff = snd_soc_poweroff,
1777 .restore = snd_soc_resume,
1778};
1779EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1780
1781/* ASoC platform driver */
1782static struct platform_driver soc_driver = {
1783 .driver = {
1784 .name = "soc-audio",
1785 .pm = &snd_soc_pm_ops,
1786 },
1787 .probe = soc_probe,
1788 .remove = soc_remove,
1789};
1790
1791/**
1792 * snd_soc_cnew - create new control
1793 * @_template: control template
1794 * @data: control private data
1795 * @long_name: control long name
1796 * @prefix: control name prefix
1797 *
1798 * Create a new mixer control from a template control.
1799 *
1800 * Returns 0 for success, else error.
1801 */
1802struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1803 void *data, const char *long_name,
1804 const char *prefix)
1805{
1806 struct snd_kcontrol_new template;
1807 struct snd_kcontrol *kcontrol;
1808 char *name = NULL;
1809
1810 memcpy(&template, _template, sizeof(template));
1811 template.index = 0;
1812
1813 if (!long_name)
1814 long_name = template.name;
1815
1816 if (prefix) {
1817 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1818 if (!name)
1819 return NULL;
1820
1821 template.name = name;
1822 } else {
1823 template.name = long_name;
1824 }
1825
1826 kcontrol = snd_ctl_new1(&template, data);
1827
1828 kfree(name);
1829
1830 return kcontrol;
1831}
1832EXPORT_SYMBOL_GPL(snd_soc_cnew);
1833
1834static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1835 const struct snd_kcontrol_new *controls, int num_controls,
1836 const char *prefix, void *data)
1837{
1838 int err, i;
1839
1840 for (i = 0; i < num_controls; i++) {
1841 const struct snd_kcontrol_new *control = &controls[i];
1842 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1843 control->name, prefix));
1844 if (err < 0) {
1845 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1846 control->name, err);
1847 return err;
1848 }
1849 }
1850
1851 return 0;
1852}
1853
1854struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1855 const char *name)
1856{
1857 struct snd_card *card = soc_card->snd_card;
1858 struct snd_kcontrol *kctl;
1859
1860 if (unlikely(!name))
1861 return NULL;
1862
1863 list_for_each_entry(kctl, &card->controls, list)
1864 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1865 return kctl;
1866 return NULL;
1867}
1868EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1869
1870/**
1871 * snd_soc_add_component_controls - Add an array of controls to a component.
1872 *
1873 * @component: Component to add controls to
1874 * @controls: Array of controls to add
1875 * @num_controls: Number of elements in the array
1876 *
1877 * Return: 0 for success, else error.
1878 */
1879int snd_soc_add_component_controls(struct snd_soc_component *component,
1880 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1881{
1882 struct snd_card *card = component->card->snd_card;
1883
1884 return snd_soc_add_controls(card, component->dev, controls,
1885 num_controls, component->name_prefix, component);
1886}
1887EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1888
1889/**
1890 * snd_soc_add_codec_controls - add an array of controls to a codec.
1891 * Convenience function to add a list of controls. Many codecs were
1892 * duplicating this code.
1893 *
1894 * @codec: codec to add controls to
1895 * @controls: array of controls to add
1896 * @num_controls: number of elements in the array
1897 *
1898 * Return 0 for success, else error.
1899 */
1900int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1901 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1902{
1903 return snd_soc_add_component_controls(&codec->component, controls,
1904 num_controls);
1905}
1906EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1907
1908/**
1909 * snd_soc_add_platform_controls - add an array of controls to a platform.
1910 * Convenience function to add a list of controls.
1911 *
1912 * @platform: platform to add controls to
1913 * @controls: array of controls to add
1914 * @num_controls: number of elements in the array
1915 *
1916 * Return 0 for success, else error.
1917 */
1918int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1919 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1920{
1921 return snd_soc_add_component_controls(&platform->component, controls,
1922 num_controls);
1923}
1924EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1925
1926/**
1927 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1928 * Convenience function to add a list of controls.
1929 *
1930 * @soc_card: SoC card to add controls to
1931 * @controls: array of controls to add
1932 * @num_controls: number of elements in the array
1933 *
1934 * Return 0 for success, else error.
1935 */
1936int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1937 const struct snd_kcontrol_new *controls, int num_controls)
1938{
1939 struct snd_card *card = soc_card->snd_card;
1940
1941 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1942 NULL, soc_card);
1943}
1944EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1945
1946/**
1947 * snd_soc_add_dai_controls - add an array of controls to a DAI.
1948 * Convienience function to add a list of controls.
1949 *
1950 * @dai: DAI to add controls to
1951 * @controls: array of controls to add
1952 * @num_controls: number of elements in the array
1953 *
1954 * Return 0 for success, else error.
1955 */
1956int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
1957 const struct snd_kcontrol_new *controls, int num_controls)
1958{
1959 struct snd_card *card = dai->component->card->snd_card;
1960
1961 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
1962 NULL, dai);
1963}
1964EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
1965
1966/**
1967 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1968 * @dai: DAI
1969 * @clk_id: DAI specific clock ID
1970 * @freq: new clock frequency in Hz
1971 * @dir: new clock direction - input/output.
1972 *
1973 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1974 */
1975int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1976 unsigned int freq, int dir)
1977{
1978 if (dai->driver && dai->driver->ops->set_sysclk)
1979 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
1980 else if (dai->codec && dai->codec->driver->set_sysclk)
1981 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
1982 freq, dir);
1983 else
1984 return -ENOTSUPP;
1985}
1986EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
1987
1988/**
1989 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
1990 * @codec: CODEC
1991 * @clk_id: DAI specific clock ID
1992 * @source: Source for the clock
1993 * @freq: new clock frequency in Hz
1994 * @dir: new clock direction - input/output.
1995 *
1996 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
1997 */
1998int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
1999 int source, unsigned int freq, int dir)
2000{
2001 if (codec->driver->set_sysclk)
2002 return codec->driver->set_sysclk(codec, clk_id, source,
2003 freq, dir);
2004 else
2005 return -ENOTSUPP;
2006}
2007EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2008
2009/**
2010 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2011 * @dai: DAI
2012 * @div_id: DAI specific clock divider ID
2013 * @div: new clock divisor.
2014 *
2015 * Configures the clock dividers. This is used to derive the best DAI bit and
2016 * frame clocks from the system or master clock. It's best to set the DAI bit
2017 * and frame clocks as low as possible to save system power.
2018 */
2019int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2020 int div_id, int div)
2021{
2022 if (dai->driver && dai->driver->ops->set_clkdiv)
2023 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2024 else
2025 return -EINVAL;
2026}
2027EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2028
2029/**
2030 * snd_soc_dai_set_pll - configure DAI PLL.
2031 * @dai: DAI
2032 * @pll_id: DAI specific PLL ID
2033 * @source: DAI specific source for the PLL
2034 * @freq_in: PLL input clock frequency in Hz
2035 * @freq_out: requested PLL output clock frequency in Hz
2036 *
2037 * Configures and enables PLL to generate output clock based on input clock.
2038 */
2039int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2040 unsigned int freq_in, unsigned int freq_out)
2041{
2042 if (dai->driver && dai->driver->ops->set_pll)
2043 return dai->driver->ops->set_pll(dai, pll_id, source,
2044 freq_in, freq_out);
2045 else if (dai->codec && dai->codec->driver->set_pll)
2046 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2047 freq_in, freq_out);
2048 else
2049 return -EINVAL;
2050}
2051EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2052
2053/*
2054 * snd_soc_codec_set_pll - configure codec PLL.
2055 * @codec: CODEC
2056 * @pll_id: DAI specific PLL ID
2057 * @source: DAI specific source for the PLL
2058 * @freq_in: PLL input clock frequency in Hz
2059 * @freq_out: requested PLL output clock frequency in Hz
2060 *
2061 * Configures and enables PLL to generate output clock based on input clock.
2062 */
2063int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2064 unsigned int freq_in, unsigned int freq_out)
2065{
2066 if (codec->driver->set_pll)
2067 return codec->driver->set_pll(codec, pll_id, source,
2068 freq_in, freq_out);
2069 else
2070 return -EINVAL;
2071}
2072EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2073
2074/**
2075 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2076 * @dai: DAI
2077 * @ratio Ratio of BCLK to Sample rate.
2078 *
2079 * Configures the DAI for a preset BCLK to sample rate ratio.
2080 */
2081int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2082{
2083 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2084 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2085 else
2086 return -EINVAL;
2087}
2088EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2089
2090/**
2091 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2092 * @dai: DAI
2093 * @fmt: SND_SOC_DAIFMT_ format value.
2094 *
2095 * Configures the DAI hardware format and clocking.
2096 */
2097int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2098{
2099 if (dai->driver == NULL)
2100 return -EINVAL;
2101 if (dai->driver->ops->set_fmt == NULL)
2102 return -ENOTSUPP;
2103 return dai->driver->ops->set_fmt(dai, fmt);
2104}
2105EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2106
2107/**
2108 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2109 * @slots: Number of slots in use.
2110 * @tx_mask: bitmask representing active TX slots.
2111 * @rx_mask: bitmask representing active RX slots.
2112 *
2113 * Generates the TDM tx and rx slot default masks for DAI.
2114 */
2115static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2116 unsigned int *tx_mask,
2117 unsigned int *rx_mask)
2118{
2119 if (*tx_mask || *rx_mask)
2120 return 0;
2121
2122 if (!slots)
2123 return -EINVAL;
2124
2125 *tx_mask = (1 << slots) - 1;
2126 *rx_mask = (1 << slots) - 1;
2127
2128 return 0;
2129}
2130
2131/**
2132 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2133 * @dai: DAI
2134 * @tx_mask: bitmask representing active TX slots.
2135 * @rx_mask: bitmask representing active RX slots.
2136 * @slots: Number of slots in use.
2137 * @slot_width: Width in bits for each slot.
2138 *
2139 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2140 * specific.
2141 */
2142int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2143 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2144{
2145 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2146 dai->driver->ops->xlate_tdm_slot_mask(slots,
2147 &tx_mask, &rx_mask);
2148 else
2149 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2150
2151 dai->tx_mask = tx_mask;
2152 dai->rx_mask = rx_mask;
2153
2154 if (dai->driver && dai->driver->ops->set_tdm_slot)
2155 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2156 slots, slot_width);
2157 else
2158 return -ENOTSUPP;
2159}
2160EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2161
2162/**
2163 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2164 * @dai: DAI
2165 * @tx_num: how many TX channels
2166 * @tx_slot: pointer to an array which imply the TX slot number channel
2167 * 0~num-1 uses
2168 * @rx_num: how many RX channels
2169 * @rx_slot: pointer to an array which imply the RX slot number channel
2170 * 0~num-1 uses
2171 *
2172 * configure the relationship between channel number and TDM slot number.
2173 */
2174int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2175 unsigned int tx_num, unsigned int *tx_slot,
2176 unsigned int rx_num, unsigned int *rx_slot)
2177{
2178 if (dai->driver && dai->driver->ops->set_channel_map)
2179 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2180 rx_num, rx_slot);
2181 else
2182 return -EINVAL;
2183}
2184EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2185
2186/**
2187 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2188 * @dai: DAI
2189 * @tristate: tristate enable
2190 *
2191 * Tristates the DAI so that others can use it.
2192 */
2193int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2194{
2195 if (dai->driver && dai->driver->ops->set_tristate)
2196 return dai->driver->ops->set_tristate(dai, tristate);
2197 else
2198 return -EINVAL;
2199}
2200EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2201
2202/**
2203 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2204 * @dai: DAI
2205 * @mute: mute enable
2206 * @direction: stream to mute
2207 *
2208 * Mutes the DAI DAC.
2209 */
2210int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2211 int direction)
2212{
2213 if (!dai->driver)
2214 return -ENOTSUPP;
2215
2216 if (dai->driver->ops->mute_stream)
2217 return dai->driver->ops->mute_stream(dai, mute, direction);
2218 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2219 dai->driver->ops->digital_mute)
2220 return dai->driver->ops->digital_mute(dai, mute);
2221 else
2222 return -ENOTSUPP;
2223}
2224EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2225
2226static int snd_soc_init_multicodec(struct snd_soc_card *card,
2227 struct snd_soc_dai_link *dai_link)
2228{
2229 /* Legacy codec/codec_dai link is a single entry in multicodec */
2230 if (dai_link->codec_name || dai_link->codec_of_node ||
2231 dai_link->codec_dai_name) {
2232 dai_link->num_codecs = 1;
2233
2234 dai_link->codecs = devm_kzalloc(card->dev,
2235 sizeof(struct snd_soc_dai_link_component),
2236 GFP_KERNEL);
2237 if (!dai_link->codecs)
2238 return -ENOMEM;
2239
2240 dai_link->codecs[0].name = dai_link->codec_name;
2241 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2242 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2243 }
2244
2245 if (!dai_link->codecs) {
2246 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2247 return -EINVAL;
2248 }
2249
2250 return 0;
2251}
2252
2253/**
2254 * snd_soc_register_card - Register a card with the ASoC core
2255 *
2256 * @card: Card to register
2257 *
2258 */
2259int snd_soc_register_card(struct snd_soc_card *card)
2260{
2261 int i, j, ret;
2262
2263 if (!card->name || !card->dev)
2264 return -EINVAL;
2265
2266 for (i = 0; i < card->num_links; i++) {
2267 struct snd_soc_dai_link *link = &card->dai_link[i];
2268
2269 ret = snd_soc_init_multicodec(card, link);
2270 if (ret) {
2271 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2272 return ret;
2273 }
2274
2275 for (j = 0; j < link->num_codecs; j++) {
2276 /*
2277 * Codec must be specified by 1 of name or OF node,
2278 * not both or neither.
2279 */
2280 if (!!link->codecs[j].name ==
2281 !!link->codecs[j].of_node) {
2282 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2283 link->name);
2284 return -EINVAL;
2285 }
2286 /* Codec DAI name must be specified */
2287 if (!link->codecs[j].dai_name) {
2288 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2289 link->name);
2290 return -EINVAL;
2291 }
2292 }
2293
2294 /*
2295 * Platform may be specified by either name or OF node, but
2296 * can be left unspecified, and a dummy platform will be used.
2297 */
2298 if (link->platform_name && link->platform_of_node) {
2299 dev_err(card->dev,
2300 "ASoC: Both platform name/of_node are set for %s\n",
2301 link->name);
2302 return -EINVAL;
2303 }
2304
2305 /*
2306 * CPU device may be specified by either name or OF node, but
2307 * can be left unspecified, and will be matched based on DAI
2308 * name alone..
2309 */
2310 if (link->cpu_name && link->cpu_of_node) {
2311 dev_err(card->dev,
2312 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2313 link->name);
2314 return -EINVAL;
2315 }
2316 /*
2317 * At least one of CPU DAI name or CPU device name/node must be
2318 * specified
2319 */
2320 if (!link->cpu_dai_name &&
2321 !(link->cpu_name || link->cpu_of_node)) {
2322 dev_err(card->dev,
2323 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2324 link->name);
2325 return -EINVAL;
2326 }
2327 }
2328
2329 dev_set_drvdata(card->dev, card);
2330
2331 snd_soc_initialize_card_lists(card);
2332
2333 soc_init_card_debugfs(card);
2334
2335 card->rtd = devm_kzalloc(card->dev,
2336 sizeof(struct snd_soc_pcm_runtime) *
2337 (card->num_links + card->num_aux_devs),
2338 GFP_KERNEL);
2339 if (card->rtd == NULL)
2340 return -ENOMEM;
2341 card->num_rtd = 0;
2342 card->rtd_aux = &card->rtd[card->num_links];
2343
2344 for (i = 0; i < card->num_links; i++) {
2345 card->rtd[i].card = card;
2346 card->rtd[i].dai_link = &card->dai_link[i];
2347 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2348 sizeof(struct snd_soc_dai *) *
2349 (card->rtd[i].dai_link->num_codecs),
2350 GFP_KERNEL);
2351 if (card->rtd[i].codec_dais == NULL)
2352 return -ENOMEM;
2353 }
2354
2355 for (i = 0; i < card->num_aux_devs; i++)
2356 card->rtd_aux[i].card = card;
2357
2358 INIT_LIST_HEAD(&card->dapm_dirty);
2359 card->instantiated = 0;
2360 mutex_init(&card->mutex);
2361 mutex_init(&card->dapm_mutex);
2362
2363 ret = snd_soc_instantiate_card(card);
2364 if (ret != 0)
2365 soc_cleanup_card_debugfs(card);
2366
2367 /* deactivate pins to sleep state */
2368 for (i = 0; i < card->num_rtd; i++) {
2369 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2370 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2371 int j;
2372
2373 for (j = 0; j < rtd->num_codecs; j++) {
2374 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2375 if (!codec_dai->active)
2376 pinctrl_pm_select_sleep_state(codec_dai->dev);
2377 }
2378
2379 if (!cpu_dai->active)
2380 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2381 }
2382
2383 return ret;
2384}
2385EXPORT_SYMBOL_GPL(snd_soc_register_card);
2386
2387/**
2388 * snd_soc_unregister_card - Unregister a card with the ASoC core
2389 *
2390 * @card: Card to unregister
2391 *
2392 */
2393int snd_soc_unregister_card(struct snd_soc_card *card)
2394{
2395 if (card->instantiated) {
2396 card->instantiated = false;
2397 snd_soc_dapm_shutdown(card);
2398 soc_cleanup_card_resources(card);
2399 }
2400 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2401
2402 return 0;
2403}
2404EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2405
2406/*
2407 * Simplify DAI link configuration by removing ".-1" from device names
2408 * and sanitizing names.
2409 */
2410static char *fmt_single_name(struct device *dev, int *id)
2411{
2412 char *found, name[NAME_SIZE];
2413 int id1, id2;
2414
2415 if (dev_name(dev) == NULL)
2416 return NULL;
2417
2418 strlcpy(name, dev_name(dev), NAME_SIZE);
2419
2420 /* are we a "%s.%d" name (platform and SPI components) */
2421 found = strstr(name, dev->driver->name);
2422 if (found) {
2423 /* get ID */
2424 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2425
2426 /* discard ID from name if ID == -1 */
2427 if (*id == -1)
2428 found[strlen(dev->driver->name)] = '\0';
2429 }
2430
2431 } else {
2432 /* I2C component devices are named "bus-addr" */
2433 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2434 char tmp[NAME_SIZE];
2435
2436 /* create unique ID number from I2C addr and bus */
2437 *id = ((id1 & 0xffff) << 16) + id2;
2438
2439 /* sanitize component name for DAI link creation */
2440 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2441 strlcpy(name, tmp, NAME_SIZE);
2442 } else
2443 *id = 0;
2444 }
2445
2446 return kstrdup(name, GFP_KERNEL);
2447}
2448
2449/*
2450 * Simplify DAI link naming for single devices with multiple DAIs by removing
2451 * any ".-1" and using the DAI name (instead of device name).
2452 */
2453static inline char *fmt_multiple_name(struct device *dev,
2454 struct snd_soc_dai_driver *dai_drv)
2455{
2456 if (dai_drv->name == NULL) {
2457 dev_err(dev,
2458 "ASoC: error - multiple DAI %s registered with no name\n",
2459 dev_name(dev));
2460 return NULL;
2461 }
2462
2463 return kstrdup(dai_drv->name, GFP_KERNEL);
2464}
2465
2466/**
2467 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2468 *
2469 * @component: The component for which the DAIs should be unregistered
2470 */
2471static void snd_soc_unregister_dais(struct snd_soc_component *component)
2472{
2473 struct snd_soc_dai *dai, *_dai;
2474
2475 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2476 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2477 dai->name);
2478 list_del(&dai->list);
2479 kfree(dai->name);
2480 kfree(dai);
2481 }
2482}
2483
2484/**
2485 * snd_soc_register_dais - Register a DAI with the ASoC core
2486 *
2487 * @component: The component the DAIs are registered for
2488 * @dai_drv: DAI driver to use for the DAIs
2489 * @count: Number of DAIs
2490 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2491 * parent's name.
2492 */
2493static int snd_soc_register_dais(struct snd_soc_component *component,
2494 struct snd_soc_dai_driver *dai_drv, size_t count,
2495 bool legacy_dai_naming)
2496{
2497 struct device *dev = component->dev;
2498 struct snd_soc_dai *dai;
2499 unsigned int i;
2500 int ret;
2501
2502 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2503
2504 component->dai_drv = dai_drv;
2505 component->num_dai = count;
2506
2507 for (i = 0; i < count; i++) {
2508
2509 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2510 if (dai == NULL) {
2511 ret = -ENOMEM;
2512 goto err;
2513 }
2514
2515 /*
2516 * Back in the old days when we still had component-less DAIs,
2517 * instead of having a static name, component-less DAIs would
2518 * inherit the name of the parent device so it is possible to
2519 * register multiple instances of the DAI. We still need to keep
2520 * the same naming style even though those DAIs are not
2521 * component-less anymore.
2522 */
2523 if (count == 1 && legacy_dai_naming) {
2524 dai->name = fmt_single_name(dev, &dai->id);
2525 } else {
2526 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2527 if (dai_drv[i].id)
2528 dai->id = dai_drv[i].id;
2529 else
2530 dai->id = i;
2531 }
2532 if (dai->name == NULL) {
2533 kfree(dai);
2534 ret = -ENOMEM;
2535 goto err;
2536 }
2537
2538 dai->component = component;
2539 dai->dev = dev;
2540 dai->driver = &dai_drv[i];
2541 if (!dai->driver->ops)
2542 dai->driver->ops = &null_dai_ops;
2543
2544 list_add(&dai->list, &component->dai_list);
2545
2546 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2547 }
2548
2549 return 0;
2550
2551err:
2552 snd_soc_unregister_dais(component);
2553
2554 return ret;
2555}
2556
2557static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2558 enum snd_soc_dapm_type type, int subseq)
2559{
2560 struct snd_soc_component *component = dapm->component;
2561
2562 component->driver->seq_notifier(component, type, subseq);
2563}
2564
2565static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2566 int event)
2567{
2568 struct snd_soc_component *component = dapm->component;
2569
2570 return component->driver->stream_event(component, event);
2571}
2572
2573static int snd_soc_component_initialize(struct snd_soc_component *component,
2574 const struct snd_soc_component_driver *driver, struct device *dev)
2575{
2576 struct snd_soc_dapm_context *dapm;
2577
2578 component->name = fmt_single_name(dev, &component->id);
2579 if (!component->name) {
2580 dev_err(dev, "ASoC: Failed to allocate name\n");
2581 return -ENOMEM;
2582 }
2583
2584 component->dev = dev;
2585 component->driver = driver;
2586 component->probe = component->driver->probe;
2587 component->remove = component->driver->remove;
2588
2589 if (!component->dapm_ptr)
2590 component->dapm_ptr = &component->dapm;
2591
2592 dapm = component->dapm_ptr;
2593 dapm->dev = dev;
2594 dapm->component = component;
2595 dapm->bias_level = SND_SOC_BIAS_OFF;
2596 dapm->idle_bias_off = true;
2597 if (driver->seq_notifier)
2598 dapm->seq_notifier = snd_soc_component_seq_notifier;
2599 if (driver->stream_event)
2600 dapm->stream_event = snd_soc_component_stream_event;
2601
2602 component->controls = driver->controls;
2603 component->num_controls = driver->num_controls;
2604 component->dapm_widgets = driver->dapm_widgets;
2605 component->num_dapm_widgets = driver->num_dapm_widgets;
2606 component->dapm_routes = driver->dapm_routes;
2607 component->num_dapm_routes = driver->num_dapm_routes;
2608
2609 INIT_LIST_HEAD(&component->dai_list);
2610 mutex_init(&component->io_mutex);
2611
2612 return 0;
2613}
2614
2615static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2616{
2617 int val_bytes = regmap_get_val_bytes(component->regmap);
2618
2619 /* Errors are legitimate for non-integer byte multiples */
2620 if (val_bytes > 0)
2621 component->val_bytes = val_bytes;
2622}
2623
2624#ifdef CONFIG_REGMAP
2625
2626/**
2627 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2628 * @component: The component for which to initialize the regmap instance
2629 * @regmap: The regmap instance that should be used by the component
2630 *
2631 * This function allows deferred assignment of the regmap instance that is
2632 * associated with the component. Only use this if the regmap instance is not
2633 * yet ready when the component is registered. The function must also be called
2634 * before the first IO attempt of the component.
2635 */
2636void snd_soc_component_init_regmap(struct snd_soc_component *component,
2637 struct regmap *regmap)
2638{
2639 component->regmap = regmap;
2640 snd_soc_component_setup_regmap(component);
2641}
2642EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2643
2644/**
2645 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2646 * @component: The component for which to de-initialize the regmap instance
2647 *
2648 * Calls regmap_exit() on the regmap instance associated to the component and
2649 * removes the regmap instance from the component.
2650 *
2651 * This function should only be used if snd_soc_component_init_regmap() was used
2652 * to initialize the regmap instance.
2653 */
2654void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2655{
2656 regmap_exit(component->regmap);
2657 component->regmap = NULL;
2658}
2659EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2660
2661#endif
2662
2663static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2664{
2665 if (!component->write && !component->read) {
2666 if (!component->regmap)
2667 component->regmap = dev_get_regmap(component->dev, NULL);
2668 if (component->regmap)
2669 snd_soc_component_setup_regmap(component);
2670 }
2671
2672 list_add(&component->list, &component_list);
2673}
2674
2675static void snd_soc_component_add(struct snd_soc_component *component)
2676{
2677 mutex_lock(&client_mutex);
2678 snd_soc_component_add_unlocked(component);
2679 mutex_unlock(&client_mutex);
2680}
2681
2682static void snd_soc_component_cleanup(struct snd_soc_component *component)
2683{
2684 snd_soc_unregister_dais(component);
2685 kfree(component->name);
2686}
2687
2688static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2689{
2690 list_del(&component->list);
2691}
2692
2693static void snd_soc_component_del(struct snd_soc_component *component)
2694{
2695 mutex_lock(&client_mutex);
2696 snd_soc_component_del_unlocked(component);
2697 mutex_unlock(&client_mutex);
2698}
2699
2700int snd_soc_register_component(struct device *dev,
2701 const struct snd_soc_component_driver *cmpnt_drv,
2702 struct snd_soc_dai_driver *dai_drv,
2703 int num_dai)
2704{
2705 struct snd_soc_component *cmpnt;
2706 int ret;
2707
2708 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2709 if (!cmpnt) {
2710 dev_err(dev, "ASoC: Failed to allocate memory\n");
2711 return -ENOMEM;
2712 }
2713
2714 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2715 if (ret)
2716 goto err_free;
2717
2718 cmpnt->ignore_pmdown_time = true;
2719 cmpnt->registered_as_component = true;
2720
2721 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2722 if (ret < 0) {
2723 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2724 goto err_cleanup;
2725 }
2726
2727 snd_soc_component_add(cmpnt);
2728
2729 return 0;
2730
2731err_cleanup:
2732 snd_soc_component_cleanup(cmpnt);
2733err_free:
2734 kfree(cmpnt);
2735 return ret;
2736}
2737EXPORT_SYMBOL_GPL(snd_soc_register_component);
2738
2739/**
2740 * snd_soc_unregister_component - Unregister a component from the ASoC core
2741 *
2742 */
2743void snd_soc_unregister_component(struct device *dev)
2744{
2745 struct snd_soc_component *cmpnt;
2746
2747 list_for_each_entry(cmpnt, &component_list, list) {
2748 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2749 goto found;
2750 }
2751 return;
2752
2753found:
2754 snd_soc_component_del(cmpnt);
2755 snd_soc_component_cleanup(cmpnt);
2756 kfree(cmpnt);
2757}
2758EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2759
2760static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2761{
2762 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2763
2764 return platform->driver->probe(platform);
2765}
2766
2767static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2768{
2769 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2770
2771 platform->driver->remove(platform);
2772}
2773
2774/**
2775 * snd_soc_add_platform - Add a platform to the ASoC core
2776 * @dev: The parent device for the platform
2777 * @platform: The platform to add
2778 * @platform_driver: The driver for the platform
2779 */
2780int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2781 const struct snd_soc_platform_driver *platform_drv)
2782{
2783 int ret;
2784
2785 ret = snd_soc_component_initialize(&platform->component,
2786 &platform_drv->component_driver, dev);
2787 if (ret)
2788 return ret;
2789
2790 platform->dev = dev;
2791 platform->driver = platform_drv;
2792
2793 if (platform_drv->probe)
2794 platform->component.probe = snd_soc_platform_drv_probe;
2795 if (platform_drv->remove)
2796 platform->component.remove = snd_soc_platform_drv_remove;
2797
2798#ifdef CONFIG_DEBUG_FS
2799 platform->component.debugfs_prefix = "platform";
2800#endif
2801
2802 mutex_lock(&client_mutex);
2803 snd_soc_component_add_unlocked(&platform->component);
2804 list_add(&platform->list, &platform_list);
2805 mutex_unlock(&client_mutex);
2806
2807 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2808 platform->component.name);
2809
2810 return 0;
2811}
2812EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2813
2814/**
2815 * snd_soc_register_platform - Register a platform with the ASoC core
2816 *
2817 * @platform: platform to register
2818 */
2819int snd_soc_register_platform(struct device *dev,
2820 const struct snd_soc_platform_driver *platform_drv)
2821{
2822 struct snd_soc_platform *platform;
2823 int ret;
2824
2825 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2826
2827 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2828 if (platform == NULL)
2829 return -ENOMEM;
2830
2831 ret = snd_soc_add_platform(dev, platform, platform_drv);
2832 if (ret)
2833 kfree(platform);
2834
2835 return ret;
2836}
2837EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2838
2839/**
2840 * snd_soc_remove_platform - Remove a platform from the ASoC core
2841 * @platform: the platform to remove
2842 */
2843void snd_soc_remove_platform(struct snd_soc_platform *platform)
2844{
2845
2846 mutex_lock(&client_mutex);
2847 list_del(&platform->list);
2848 snd_soc_component_del_unlocked(&platform->component);
2849 mutex_unlock(&client_mutex);
2850
2851 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2852 platform->component.name);
2853
2854 snd_soc_component_cleanup(&platform->component);
2855}
2856EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2857
2858struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2859{
2860 struct snd_soc_platform *platform;
2861
2862 list_for_each_entry(platform, &platform_list, list) {
2863 if (dev == platform->dev)
2864 return platform;
2865 }
2866
2867 return NULL;
2868}
2869EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2870
2871/**
2872 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2873 *
2874 * @platform: platform to unregister
2875 */
2876void snd_soc_unregister_platform(struct device *dev)
2877{
2878 struct snd_soc_platform *platform;
2879
2880 platform = snd_soc_lookup_platform(dev);
2881 if (!platform)
2882 return;
2883
2884 snd_soc_remove_platform(platform);
2885 kfree(platform);
2886}
2887EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2888
2889static u64 codec_format_map[] = {
2890 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2891 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2892 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2893 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2894 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2895 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2896 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2897 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2898 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2899 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2900 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2901 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2902 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2903 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2904 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2905 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2906};
2907
2908/* Fix up the DAI formats for endianness: codecs don't actually see
2909 * the endianness of the data but we're using the CPU format
2910 * definitions which do need to include endianness so we ensure that
2911 * codec DAIs always have both big and little endian variants set.
2912 */
2913static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2914{
2915 int i;
2916
2917 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2918 if (stream->formats & codec_format_map[i])
2919 stream->formats |= codec_format_map[i];
2920}
2921
2922static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2923{
2924 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2925
2926 return codec->driver->probe(codec);
2927}
2928
2929static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2930{
2931 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2932
2933 codec->driver->remove(codec);
2934}
2935
2936static int snd_soc_codec_drv_write(struct snd_soc_component *component,
2937 unsigned int reg, unsigned int val)
2938{
2939 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2940
2941 return codec->driver->write(codec, reg, val);
2942}
2943
2944static int snd_soc_codec_drv_read(struct snd_soc_component *component,
2945 unsigned int reg, unsigned int *val)
2946{
2947 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2948
2949 *val = codec->driver->read(codec, reg);
2950
2951 return 0;
2952}
2953
2954static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
2955 enum snd_soc_bias_level level)
2956{
2957 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
2958
2959 return codec->driver->set_bias_level(codec, level);
2960}
2961
2962/**
2963 * snd_soc_register_codec - Register a codec with the ASoC core
2964 *
2965 * @codec: codec to register
2966 */
2967int snd_soc_register_codec(struct device *dev,
2968 const struct snd_soc_codec_driver *codec_drv,
2969 struct snd_soc_dai_driver *dai_drv,
2970 int num_dai)
2971{
2972 struct snd_soc_codec *codec;
2973 struct snd_soc_dai *dai;
2974 int ret, i;
2975
2976 dev_dbg(dev, "codec register %s\n", dev_name(dev));
2977
2978 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
2979 if (codec == NULL)
2980 return -ENOMEM;
2981
2982 codec->component.dapm_ptr = &codec->dapm;
2983 codec->component.codec = codec;
2984
2985 ret = snd_soc_component_initialize(&codec->component,
2986 &codec_drv->component_driver, dev);
2987 if (ret)
2988 goto err_free;
2989
2990 if (codec_drv->controls) {
2991 codec->component.controls = codec_drv->controls;
2992 codec->component.num_controls = codec_drv->num_controls;
2993 }
2994 if (codec_drv->dapm_widgets) {
2995 codec->component.dapm_widgets = codec_drv->dapm_widgets;
2996 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
2997 }
2998 if (codec_drv->dapm_routes) {
2999 codec->component.dapm_routes = codec_drv->dapm_routes;
3000 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3001 }
3002
3003 if (codec_drv->probe)
3004 codec->component.probe = snd_soc_codec_drv_probe;
3005 if (codec_drv->remove)
3006 codec->component.remove = snd_soc_codec_drv_remove;
3007 if (codec_drv->write)
3008 codec->component.write = snd_soc_codec_drv_write;
3009 if (codec_drv->read)
3010 codec->component.read = snd_soc_codec_drv_read;
3011 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3012 codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3013 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3014 if (codec_drv->seq_notifier)
3015 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3016 if (codec_drv->set_bias_level)
3017 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3018 codec->dev = dev;
3019 codec->driver = codec_drv;
3020 codec->component.val_bytes = codec_drv->reg_word_size;
3021
3022#ifdef CONFIG_DEBUG_FS
3023 codec->component.init_debugfs = soc_init_codec_debugfs;
3024 codec->component.debugfs_prefix = "codec";
3025#endif
3026
3027 if (codec_drv->get_regmap)
3028 codec->component.regmap = codec_drv->get_regmap(dev);
3029
3030 for (i = 0; i < num_dai; i++) {
3031 fixup_codec_formats(&dai_drv[i].playback);
3032 fixup_codec_formats(&dai_drv[i].capture);
3033 }
3034
3035 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3036 if (ret < 0) {
3037 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3038 goto err_cleanup;
3039 }
3040
3041 list_for_each_entry(dai, &codec->component.dai_list, list)
3042 dai->codec = codec;
3043
3044 mutex_lock(&client_mutex);
3045 snd_soc_component_add_unlocked(&codec->component);
3046 list_add(&codec->list, &codec_list);
3047 mutex_unlock(&client_mutex);
3048
3049 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3050 codec->component.name);
3051 return 0;
3052
3053err_cleanup:
3054 snd_soc_component_cleanup(&codec->component);
3055err_free:
3056 kfree(codec);
3057 return ret;
3058}
3059EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3060
3061/**
3062 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3063 *
3064 * @codec: codec to unregister
3065 */
3066void snd_soc_unregister_codec(struct device *dev)
3067{
3068 struct snd_soc_codec *codec;
3069
3070 list_for_each_entry(codec, &codec_list, list) {
3071 if (dev == codec->dev)
3072 goto found;
3073 }
3074 return;
3075
3076found:
3077
3078 mutex_lock(&client_mutex);
3079 list_del(&codec->list);
3080 snd_soc_component_del_unlocked(&codec->component);
3081 mutex_unlock(&client_mutex);
3082
3083 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3084 codec->component.name);
3085
3086 snd_soc_component_cleanup(&codec->component);
3087 snd_soc_cache_exit(codec);
3088 kfree(codec);
3089}
3090EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3091
3092/* Retrieve a card's name from device tree */
3093int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3094 const char *propname)
3095{
3096 struct device_node *np;
3097 int ret;
3098
3099 if (!card->dev) {
3100 pr_err("card->dev is not set before calling %s\n", __func__);
3101 return -EINVAL;
3102 }
3103
3104 np = card->dev->of_node;
3105
3106 ret = of_property_read_string_index(np, propname, 0, &card->name);
3107 /*
3108 * EINVAL means the property does not exist. This is fine providing
3109 * card->name was previously set, which is checked later in
3110 * snd_soc_register_card.
3111 */
3112 if (ret < 0 && ret != -EINVAL) {
3113 dev_err(card->dev,
3114 "ASoC: Property '%s' could not be read: %d\n",
3115 propname, ret);
3116 return ret;
3117 }
3118
3119 return 0;
3120}
3121EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3122
3123static const struct snd_soc_dapm_widget simple_widgets[] = {
3124 SND_SOC_DAPM_MIC("Microphone", NULL),
3125 SND_SOC_DAPM_LINE("Line", NULL),
3126 SND_SOC_DAPM_HP("Headphone", NULL),
3127 SND_SOC_DAPM_SPK("Speaker", NULL),
3128};
3129
3130int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3131 const char *propname)
3132{
3133 struct device_node *np = card->dev->of_node;
3134 struct snd_soc_dapm_widget *widgets;
3135 const char *template, *wname;
3136 int i, j, num_widgets, ret;
3137
3138 num_widgets = of_property_count_strings(np, propname);
3139 if (num_widgets < 0) {
3140 dev_err(card->dev,
3141 "ASoC: Property '%s' does not exist\n", propname);
3142 return -EINVAL;
3143 }
3144 if (num_widgets & 1) {
3145 dev_err(card->dev,
3146 "ASoC: Property '%s' length is not even\n", propname);
3147 return -EINVAL;
3148 }
3149
3150 num_widgets /= 2;
3151 if (!num_widgets) {
3152 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3153 propname);
3154 return -EINVAL;
3155 }
3156
3157 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3158 GFP_KERNEL);
3159 if (!widgets) {
3160 dev_err(card->dev,
3161 "ASoC: Could not allocate memory for widgets\n");
3162 return -ENOMEM;
3163 }
3164
3165 for (i = 0; i < num_widgets; i++) {
3166 ret = of_property_read_string_index(np, propname,
3167 2 * i, &template);
3168 if (ret) {
3169 dev_err(card->dev,
3170 "ASoC: Property '%s' index %d read error:%d\n",
3171 propname, 2 * i, ret);
3172 return -EINVAL;
3173 }
3174
3175 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3176 if (!strncmp(template, simple_widgets[j].name,
3177 strlen(simple_widgets[j].name))) {
3178 widgets[i] = simple_widgets[j];
3179 break;
3180 }
3181 }
3182
3183 if (j >= ARRAY_SIZE(simple_widgets)) {
3184 dev_err(card->dev,
3185 "ASoC: DAPM widget '%s' is not supported\n",
3186 template);
3187 return -EINVAL;
3188 }
3189
3190 ret = of_property_read_string_index(np, propname,
3191 (2 * i) + 1,
3192 &wname);
3193 if (ret) {
3194 dev_err(card->dev,
3195 "ASoC: Property '%s' index %d read error:%d\n",
3196 propname, (2 * i) + 1, ret);
3197 return -EINVAL;
3198 }
3199
3200 widgets[i].name = wname;
3201 }
3202
3203 card->dapm_widgets = widgets;
3204 card->num_dapm_widgets = num_widgets;
3205
3206 return 0;
3207}
3208EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3209
3210int snd_soc_of_parse_tdm_slot(struct device_node *np,
3211 unsigned int *slots,
3212 unsigned int *slot_width)
3213{
3214 u32 val;
3215 int ret;
3216
3217 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3218 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3219 if (ret)
3220 return ret;
3221
3222 if (slots)
3223 *slots = val;
3224 }
3225
3226 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3227 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3228 if (ret)
3229 return ret;
3230
3231 if (slot_width)
3232 *slot_width = val;
3233 }
3234
3235 return 0;
3236}
3237EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3238
3239int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3240 const char *propname)
3241{
3242 struct device_node *np = card->dev->of_node;
3243 int num_routes, old_routes;
3244 struct snd_soc_dapm_route *routes;
3245 int i, ret;
3246
3247 num_routes = of_property_count_strings(np, propname);
3248 if (num_routes < 0 || num_routes & 1) {
3249 dev_err(card->dev,
3250 "ASoC: Property '%s' does not exist or its length is not even\n",
3251 propname);
3252 return -EINVAL;
3253 }
3254 num_routes /= 2;
3255 if (!num_routes) {
3256 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3257 propname);
3258 return -EINVAL;
3259 }
3260
3261 old_routes = card->num_dapm_routes;
3262 routes = devm_kzalloc(card->dev,
3263 (old_routes + num_routes) * sizeof(*routes),
3264 GFP_KERNEL);
3265 if (!routes) {
3266 dev_err(card->dev,
3267 "ASoC: Could not allocate DAPM route table\n");
3268 return -EINVAL;
3269 }
3270
3271 memcpy(routes, card->dapm_routes, old_routes * sizeof(*routes));
3272
3273 for (i = 0; i < num_routes; i++) {
3274 ret = of_property_read_string_index(np, propname,
3275 2 * i, &routes[old_routes + i].sink);
3276 if (ret) {
3277 dev_err(card->dev,
3278 "ASoC: Property '%s' index %d could not be read: %d\n",
3279 propname, 2 * i, ret);
3280 return -EINVAL;
3281 }
3282 ret = of_property_read_string_index(np, propname,
3283 (2 * i) + 1, &routes[old_routes + i].source);
3284 if (ret) {
3285 dev_err(card->dev,
3286 "ASoC: Property '%s' index %d could not be read: %d\n",
3287 propname, (2 * i) + 1, ret);
3288 return -EINVAL;
3289 }
3290 }
3291
3292 card->num_dapm_routes += num_routes;
3293 card->dapm_routes = routes;
3294
3295 return 0;
3296}
3297EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3298
3299unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3300 const char *prefix,
3301 struct device_node **bitclkmaster,
3302 struct device_node **framemaster)
3303{
3304 int ret, i;
3305 char prop[128];
3306 unsigned int format = 0;
3307 int bit, frame;
3308 const char *str;
3309 struct {
3310 char *name;
3311 unsigned int val;
3312 } of_fmt_table[] = {
3313 { "i2s", SND_SOC_DAIFMT_I2S },
3314 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3315 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3316 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3317 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3318 { "ac97", SND_SOC_DAIFMT_AC97 },
3319 { "pdm", SND_SOC_DAIFMT_PDM},
3320 { "msb", SND_SOC_DAIFMT_MSB },
3321 { "lsb", SND_SOC_DAIFMT_LSB },
3322 };
3323
3324 if (!prefix)
3325 prefix = "";
3326
3327 /*
3328 * check "[prefix]format = xxx"
3329 * SND_SOC_DAIFMT_FORMAT_MASK area
3330 */
3331 snprintf(prop, sizeof(prop), "%sformat", prefix);
3332 ret = of_property_read_string(np, prop, &str);
3333 if (ret == 0) {
3334 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3335 if (strcmp(str, of_fmt_table[i].name) == 0) {
3336 format |= of_fmt_table[i].val;
3337 break;
3338 }
3339 }
3340 }
3341
3342 /*
3343 * check "[prefix]continuous-clock"
3344 * SND_SOC_DAIFMT_CLOCK_MASK area
3345 */
3346 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3347 if (of_get_property(np, prop, NULL))
3348 format |= SND_SOC_DAIFMT_CONT;
3349 else
3350 format |= SND_SOC_DAIFMT_GATED;
3351
3352 /*
3353 * check "[prefix]bitclock-inversion"
3354 * check "[prefix]frame-inversion"
3355 * SND_SOC_DAIFMT_INV_MASK area
3356 */
3357 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3358 bit = !!of_get_property(np, prop, NULL);
3359
3360 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3361 frame = !!of_get_property(np, prop, NULL);
3362
3363 switch ((bit << 4) + frame) {
3364 case 0x11:
3365 format |= SND_SOC_DAIFMT_IB_IF;
3366 break;
3367 case 0x10:
3368 format |= SND_SOC_DAIFMT_IB_NF;
3369 break;
3370 case 0x01:
3371 format |= SND_SOC_DAIFMT_NB_IF;
3372 break;
3373 default:
3374 /* SND_SOC_DAIFMT_NB_NF is default */
3375 break;
3376 }
3377
3378 /*
3379 * check "[prefix]bitclock-master"
3380 * check "[prefix]frame-master"
3381 * SND_SOC_DAIFMT_MASTER_MASK area
3382 */
3383 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3384 bit = !!of_get_property(np, prop, NULL);
3385 if (bit && bitclkmaster)
3386 *bitclkmaster = of_parse_phandle(np, prop, 0);
3387
3388 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3389 frame = !!of_get_property(np, prop, NULL);
3390 if (frame && framemaster)
3391 *framemaster = of_parse_phandle(np, prop, 0);
3392
3393 switch ((bit << 4) + frame) {
3394 case 0x11:
3395 format |= SND_SOC_DAIFMT_CBM_CFM;
3396 break;
3397 case 0x10:
3398 format |= SND_SOC_DAIFMT_CBM_CFS;
3399 break;
3400 case 0x01:
3401 format |= SND_SOC_DAIFMT_CBS_CFM;
3402 break;
3403 default:
3404 format |= SND_SOC_DAIFMT_CBS_CFS;
3405 break;
3406 }
3407
3408 return format;
3409}
3410EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3411
3412static int snd_soc_get_dai_name(struct of_phandle_args *args,
3413 const char **dai_name)
3414{
3415 struct snd_soc_component *pos;
3416 int ret = -EPROBE_DEFER;
3417
3418 mutex_lock(&client_mutex);
3419 list_for_each_entry(pos, &component_list, list) {
3420 if (pos->dev->of_node != args->np)
3421 continue;
3422
3423 if (pos->driver->of_xlate_dai_name) {
3424 ret = pos->driver->of_xlate_dai_name(pos,
3425 args,
3426 dai_name);
3427 } else {
3428 int id = -1;
3429
3430 switch (args->args_count) {
3431 case 0:
3432 id = 0; /* same as dai_drv[0] */
3433 break;
3434 case 1:
3435 id = args->args[0];
3436 break;
3437 default:
3438 /* not supported */
3439 break;
3440 }
3441
3442 if (id < 0 || id >= pos->num_dai) {
3443 ret = -EINVAL;
3444 continue;
3445 }
3446
3447 ret = 0;
3448
3449 *dai_name = pos->dai_drv[id].name;
3450 if (!*dai_name)
3451 *dai_name = pos->name;
3452 }
3453
3454 break;
3455 }
3456 mutex_unlock(&client_mutex);
3457 return ret;
3458}
3459
3460int snd_soc_of_get_dai_name(struct device_node *of_node,
3461 const char **dai_name)
3462{
3463 struct of_phandle_args args;
3464 int ret;
3465
3466 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3467 "#sound-dai-cells", 0, &args);
3468 if (ret)
3469 return ret;
3470
3471 ret = snd_soc_get_dai_name(&args, dai_name);
3472
3473 of_node_put(args.np);
3474
3475 return ret;
3476}
3477EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3478
3479/*
3480 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3481 * @dev: Card device
3482 * @of_node: Device node
3483 * @dai_link: DAI link
3484 *
3485 * Builds an array of CODEC DAI components from the DAI link property
3486 * 'sound-dai'.
3487 * The array is set in the DAI link and the number of DAIs is set accordingly.
3488 * The device nodes in the array (of_node) must be dereferenced by the caller.
3489 *
3490 * Returns 0 for success
3491 */
3492int snd_soc_of_get_dai_link_codecs(struct device *dev,
3493 struct device_node *of_node,
3494 struct snd_soc_dai_link *dai_link)
3495{
3496 struct of_phandle_args args;
3497 struct snd_soc_dai_link_component *component;
3498 char *name;
3499 int index, num_codecs, ret;
3500
3501 /* Count the number of CODECs */
3502 name = "sound-dai";
3503 num_codecs = of_count_phandle_with_args(of_node, name,
3504 "#sound-dai-cells");
3505 if (num_codecs <= 0) {
3506 if (num_codecs == -ENOENT)
3507 dev_err(dev, "No 'sound-dai' property\n");
3508 else
3509 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3510 return num_codecs;
3511 }
3512 component = devm_kzalloc(dev,
3513 sizeof *component * num_codecs,
3514 GFP_KERNEL);
3515 if (!component)
3516 return -ENOMEM;
3517 dai_link->codecs = component;
3518 dai_link->num_codecs = num_codecs;
3519
3520 /* Parse the list */
3521 for (index = 0, component = dai_link->codecs;
3522 index < dai_link->num_codecs;
3523 index++, component++) {
3524 ret = of_parse_phandle_with_args(of_node, name,
3525 "#sound-dai-cells",
3526 index, &args);
3527 if (ret)
3528 goto err;
3529 component->of_node = args.np;
3530 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3531 if (ret < 0)
3532 goto err;
3533 }
3534 return 0;
3535err:
3536 for (index = 0, component = dai_link->codecs;
3537 index < dai_link->num_codecs;
3538 index++, component++) {
3539 if (!component->of_node)
3540 break;
3541 of_node_put(component->of_node);
3542 component->of_node = NULL;
3543 }
3544 dai_link->codecs = NULL;
3545 dai_link->num_codecs = 0;
3546 return ret;
3547}
3548EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3549
3550static int __init snd_soc_init(void)
3551{
3552#ifdef CONFIG_DEBUG_FS
3553 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3554 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3555 pr_warn("ASoC: Failed to create debugfs directory\n");
3556 snd_soc_debugfs_root = NULL;
3557 }
3558
3559 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3560 &codec_list_fops))
3561 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3562
3563 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3564 &dai_list_fops))
3565 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3566
3567 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3568 &platform_list_fops))
3569 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3570#endif
3571
3572 snd_soc_util_init();
3573
3574 return platform_driver_register(&soc_driver);
3575}
3576module_init(snd_soc_init);
3577
3578static void __exit snd_soc_exit(void)
3579{
3580 snd_soc_util_exit();
3581
3582#ifdef CONFIG_DEBUG_FS
3583 debugfs_remove_recursive(snd_soc_debugfs_root);
3584#endif
3585 platform_driver_unregister(&soc_driver);
3586}
3587module_exit(snd_soc_exit);
3588
3589/* Module information */
3590MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3591MODULE_DESCRIPTION("ALSA SoC Core");
3592MODULE_LICENSE("GPL");
3593MODULE_ALIAS("platform:soc-audio");
Linux kernel - Deliverables
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