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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/soc-topology.h>
44#include <sound/initval.h>
45
46#define CREATE_TRACE_POINTS
47#include <trace/events/asoc.h>
48
49#define NAME_SIZE 32
50
51#ifdef CONFIG_DEBUG_FS
52struct dentry *snd_soc_debugfs_root;
53EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
54#endif
55
56static DEFINE_MUTEX(client_mutex);
57static LIST_HEAD(platform_list);
58static LIST_HEAD(codec_list);
59static LIST_HEAD(component_list);
60
61/*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66static int pmdown_time = 5000;
67module_param(pmdown_time, int, 0);
68MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70/* returns the minimum number of bytes needed to represent
71 * a particular given value */
72static int min_bytes_needed(unsigned long val)
73{
74 int c = 0;
75 int i;
76
77 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
78 if (val & (1UL << i))
79 break;
80 c = (sizeof val * 8) - c;
81 if (!c || (c % 8))
82 c = (c + 8) / 8;
83 else
84 c /= 8;
85 return c;
86}
87
88/* fill buf which is 'len' bytes with a formatted
89 * string of the form 'reg: value\n' */
90static int format_register_str(struct snd_soc_codec *codec,
91 unsigned int reg, char *buf, size_t len)
92{
93 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
94 int regsize = codec->driver->reg_word_size * 2;
95 int ret;
96
97 /* +2 for ': ' and + 1 for '\n' */
98 if (wordsize + regsize + 2 + 1 != len)
99 return -EINVAL;
100
101 sprintf(buf, "%.*x: ", wordsize, reg);
102 buf += wordsize + 2;
103
104 ret = snd_soc_read(codec, reg);
105 if (ret < 0)
106 memset(buf, 'X', regsize);
107 else
108 sprintf(buf, "%.*x", regsize, ret);
109 buf[regsize] = '\n';
110 /* no NUL-termination needed */
111 return 0;
112}
113
114/* codec register dump */
115static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
116 size_t count, loff_t pos)
117{
118 int i, step = 1;
119 int wordsize, regsize;
120 int len;
121 size_t total = 0;
122 loff_t p = 0;
123
124 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
125 regsize = codec->driver->reg_word_size * 2;
126
127 len = wordsize + regsize + 2 + 1;
128
129 if (!codec->driver->reg_cache_size)
130 return 0;
131
132 if (codec->driver->reg_cache_step)
133 step = codec->driver->reg_cache_step;
134
135 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
136 /* only support larger than PAGE_SIZE bytes debugfs
137 * entries for the default case */
138 if (p >= pos) {
139 if (total + len >= count - 1)
140 break;
141 format_register_str(codec, i, buf + total, len);
142 total += len;
143 }
144 p += len;
145 }
146
147 total = min(total, count - 1);
148
149 return total;
150}
151
152static ssize_t codec_reg_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
154{
155 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
156
157 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
158}
159
160static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
161
162static ssize_t pmdown_time_show(struct device *dev,
163 struct device_attribute *attr, char *buf)
164{
165 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
166
167 return sprintf(buf, "%ld\n", rtd->pmdown_time);
168}
169
170static ssize_t pmdown_time_set(struct device *dev,
171 struct device_attribute *attr,
172 const char *buf, size_t count)
173{
174 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
175 int ret;
176
177 ret = kstrtol(buf, 10, &rtd->pmdown_time);
178 if (ret)
179 return ret;
180
181 return count;
182}
183
184static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
185
186static struct attribute *soc_dev_attrs[] = {
187 &dev_attr_codec_reg.attr,
188 &dev_attr_pmdown_time.attr,
189 NULL
190};
191
192static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
193 struct attribute *attr, int idx)
194{
195 struct device *dev = kobj_to_dev(kobj);
196 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
197
198 if (attr == &dev_attr_pmdown_time.attr)
199 return attr->mode; /* always visible */
200 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
201}
202
203static const struct attribute_group soc_dapm_dev_group = {
204 .attrs = soc_dapm_dev_attrs,
205 .is_visible = soc_dev_attr_is_visible,
206};
207
208static const struct attribute_group soc_dev_roup = {
209 .attrs = soc_dev_attrs,
210 .is_visible = soc_dev_attr_is_visible,
211};
212
213static const struct attribute_group *soc_dev_attr_groups[] = {
214 &soc_dapm_dev_group,
215 &soc_dev_roup,
216 NULL
217};
218
219#ifdef CONFIG_DEBUG_FS
220static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
221 size_t count, loff_t *ppos)
222{
223 ssize_t ret;
224 struct snd_soc_codec *codec = file->private_data;
225 char *buf;
226
227 if (*ppos < 0 || !count)
228 return -EINVAL;
229
230 buf = kmalloc(count, GFP_KERNEL);
231 if (!buf)
232 return -ENOMEM;
233
234 ret = soc_codec_reg_show(codec, buf, count, *ppos);
235 if (ret >= 0) {
236 if (copy_to_user(user_buf, buf, ret)) {
237 kfree(buf);
238 return -EFAULT;
239 }
240 *ppos += ret;
241 }
242
243 kfree(buf);
244 return ret;
245}
246
247static ssize_t codec_reg_write_file(struct file *file,
248 const char __user *user_buf, size_t count, loff_t *ppos)
249{
250 char buf[32];
251 size_t buf_size;
252 char *start = buf;
253 unsigned long reg, value;
254 struct snd_soc_codec *codec = file->private_data;
255 int ret;
256
257 buf_size = min(count, (sizeof(buf)-1));
258 if (copy_from_user(buf, user_buf, buf_size))
259 return -EFAULT;
260 buf[buf_size] = 0;
261
262 while (*start == ' ')
263 start++;
264 reg = simple_strtoul(start, &start, 16);
265 while (*start == ' ')
266 start++;
267 ret = kstrtoul(start, 16, &value);
268 if (ret)
269 return ret;
270
271 /* Userspace has been fiddling around behind the kernel's back */
272 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
273
274 snd_soc_write(codec, reg, value);
275 return buf_size;
276}
277
278static const struct file_operations codec_reg_fops = {
279 .open = simple_open,
280 .read = codec_reg_read_file,
281 .write = codec_reg_write_file,
282 .llseek = default_llseek,
283};
284
285static void soc_init_component_debugfs(struct snd_soc_component *component)
286{
287 if (!component->card->debugfs_card_root)
288 return;
289
290 if (component->debugfs_prefix) {
291 char *name;
292
293 name = kasprintf(GFP_KERNEL, "%s:%s",
294 component->debugfs_prefix, component->name);
295 if (name) {
296 component->debugfs_root = debugfs_create_dir(name,
297 component->card->debugfs_card_root);
298 kfree(name);
299 }
300 } else {
301 component->debugfs_root = debugfs_create_dir(component->name,
302 component->card->debugfs_card_root);
303 }
304
305 if (!component->debugfs_root) {
306 dev_warn(component->dev,
307 "ASoC: Failed to create component debugfs directory\n");
308 return;
309 }
310
311 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
312 component->debugfs_root);
313
314 if (component->init_debugfs)
315 component->init_debugfs(component);
316}
317
318static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
319{
320 debugfs_remove_recursive(component->debugfs_root);
321}
322
323static void soc_init_codec_debugfs(struct snd_soc_component *component)
324{
325 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
326
327 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
328 codec->component.debugfs_root,
329 codec, &codec_reg_fops);
330 if (!codec->debugfs_reg)
331 dev_warn(codec->dev,
332 "ASoC: Failed to create codec register debugfs file\n");
333}
334
335static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
336 size_t count, loff_t *ppos)
337{
338 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
339 ssize_t len, ret = 0;
340 struct snd_soc_codec *codec;
341
342 if (!buf)
343 return -ENOMEM;
344
345 mutex_lock(&client_mutex);
346
347 list_for_each_entry(codec, &codec_list, list) {
348 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
349 codec->component.name);
350 if (len >= 0)
351 ret += len;
352 if (ret > PAGE_SIZE) {
353 ret = PAGE_SIZE;
354 break;
355 }
356 }
357
358 mutex_unlock(&client_mutex);
359
360 if (ret >= 0)
361 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
362
363 kfree(buf);
364
365 return ret;
366}
367
368static const struct file_operations codec_list_fops = {
369 .read = codec_list_read_file,
370 .llseek = default_llseek,/* read accesses f_pos */
371};
372
373static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
374 size_t count, loff_t *ppos)
375{
376 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
377 ssize_t len, ret = 0;
378 struct snd_soc_component *component;
379 struct snd_soc_dai *dai;
380
381 if (!buf)
382 return -ENOMEM;
383
384 mutex_lock(&client_mutex);
385
386 list_for_each_entry(component, &component_list, list) {
387 list_for_each_entry(dai, &component->dai_list, list) {
388 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
389 dai->name);
390 if (len >= 0)
391 ret += len;
392 if (ret > PAGE_SIZE) {
393 ret = PAGE_SIZE;
394 break;
395 }
396 }
397 }
398
399 mutex_unlock(&client_mutex);
400
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403 kfree(buf);
404
405 return ret;
406}
407
408static const struct file_operations dai_list_fops = {
409 .read = dai_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
411};
412
413static ssize_t platform_list_read_file(struct file *file,
414 char __user *user_buf,
415 size_t count, loff_t *ppos)
416{
417 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
418 ssize_t len, ret = 0;
419 struct snd_soc_platform *platform;
420
421 if (!buf)
422 return -ENOMEM;
423
424 mutex_lock(&client_mutex);
425
426 list_for_each_entry(platform, &platform_list, list) {
427 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
428 platform->component.name);
429 if (len >= 0)
430 ret += len;
431 if (ret > PAGE_SIZE) {
432 ret = PAGE_SIZE;
433 break;
434 }
435 }
436
437 mutex_unlock(&client_mutex);
438
439 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
440
441 kfree(buf);
442
443 return ret;
444}
445
446static const struct file_operations platform_list_fops = {
447 .read = platform_list_read_file,
448 .llseek = default_llseek,/* read accesses f_pos */
449};
450
451static void soc_init_card_debugfs(struct snd_soc_card *card)
452{
453 if (!snd_soc_debugfs_root)
454 return;
455
456 card->debugfs_card_root = debugfs_create_dir(card->name,
457 snd_soc_debugfs_root);
458 if (!card->debugfs_card_root) {
459 dev_warn(card->dev,
460 "ASoC: Failed to create card debugfs directory\n");
461 return;
462 }
463
464 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
465 card->debugfs_card_root,
466 &card->pop_time);
467 if (!card->debugfs_pop_time)
468 dev_warn(card->dev,
469 "ASoC: Failed to create pop time debugfs file\n");
470}
471
472static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
473{
474 debugfs_remove_recursive(card->debugfs_card_root);
475}
476
477
478static void snd_soc_debugfs_init(void)
479{
480 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
481 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
482 pr_warn("ASoC: Failed to create debugfs directory\n");
483 snd_soc_debugfs_root = NULL;
484 return;
485 }
486
487 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
488 &codec_list_fops))
489 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
490
491 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
492 &dai_list_fops))
493 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
494
495 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
496 &platform_list_fops))
497 pr_warn("ASoC: Failed to create platform list debugfs file\n");
498}
499
500static void snd_soc_debugfs_exit(void)
501{
502 debugfs_remove_recursive(snd_soc_debugfs_root);
503}
504
505#else
506
507#define soc_init_codec_debugfs NULL
508
509static inline void soc_init_component_debugfs(
510 struct snd_soc_component *component)
511{
512}
513
514static inline void soc_cleanup_component_debugfs(
515 struct snd_soc_component *component)
516{
517}
518
519static inline void soc_init_card_debugfs(struct snd_soc_card *card)
520{
521}
522
523static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
524{
525}
526
527static inline void snd_soc_debugfs_init(void)
528{
529}
530
531static inline void snd_soc_debugfs_exit(void)
532{
533}
534
535#endif
536
537struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
538 const char *dai_link, int stream)
539{
540 struct snd_soc_pcm_runtime *rtd;
541
542 list_for_each_entry(rtd, &card->rtd_list, list) {
543 if (rtd->dai_link->no_pcm &&
544 !strcmp(rtd->dai_link->name, dai_link))
545 return rtd->pcm->streams[stream].substream;
546 }
547 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
548 return NULL;
549}
550EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
551
552static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
553 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
554{
555 struct snd_soc_pcm_runtime *rtd;
556
557 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
558 if (!rtd)
559 return NULL;
560
561 rtd->card = card;
562 rtd->dai_link = dai_link;
563 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
564 dai_link->num_codecs,
565 GFP_KERNEL);
566 if (!rtd->codec_dais) {
567 kfree(rtd);
568 return NULL;
569 }
570
571 return rtd;
572}
573
574static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
575{
576 if (rtd && rtd->codec_dais)
577 kfree(rtd->codec_dais);
578 kfree(rtd);
579}
580
581static void soc_add_pcm_runtime(struct snd_soc_card *card,
582 struct snd_soc_pcm_runtime *rtd)
583{
584 list_add_tail(&rtd->list, &card->rtd_list);
585 rtd->num = card->num_rtd;
586 card->num_rtd++;
587}
588
589static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
590{
591 struct snd_soc_pcm_runtime *rtd, *_rtd;
592
593 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
594 list_del(&rtd->list);
595 soc_free_pcm_runtime(rtd);
596 }
597
598 card->num_rtd = 0;
599}
600
601struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
602 const char *dai_link)
603{
604 struct snd_soc_pcm_runtime *rtd;
605
606 list_for_each_entry(rtd, &card->rtd_list, list) {
607 if (!strcmp(rtd->dai_link->name, dai_link))
608 return rtd;
609 }
610 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
611 return NULL;
612}
613EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
614
615static void codec2codec_close_delayed_work(struct work_struct *work)
616{
617 /* Currently nothing to do for c2c links
618 * Since c2c links are internal nodes in the DAPM graph and
619 * don't interface with the outside world or application layer
620 * we don't have to do any special handling on close.
621 */
622}
623
624#ifdef CONFIG_PM_SLEEP
625/* powers down audio subsystem for suspend */
626int snd_soc_suspend(struct device *dev)
627{
628 struct snd_soc_card *card = dev_get_drvdata(dev);
629 struct snd_soc_component *component;
630 struct snd_soc_pcm_runtime *rtd;
631 int i;
632
633 /* If the card is not initialized yet there is nothing to do */
634 if (!card->instantiated)
635 return 0;
636
637 /* Due to the resume being scheduled into a workqueue we could
638 * suspend before that's finished - wait for it to complete.
639 */
640 snd_power_lock(card->snd_card);
641 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
642 snd_power_unlock(card->snd_card);
643
644 /* we're going to block userspace touching us until resume completes */
645 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
646
647 /* mute any active DACs */
648 list_for_each_entry(rtd, &card->rtd_list, list) {
649
650 if (rtd->dai_link->ignore_suspend)
651 continue;
652
653 for (i = 0; i < rtd->num_codecs; i++) {
654 struct snd_soc_dai *dai = rtd->codec_dais[i];
655 struct snd_soc_dai_driver *drv = dai->driver;
656
657 if (drv->ops->digital_mute && dai->playback_active)
658 drv->ops->digital_mute(dai, 1);
659 }
660 }
661
662 /* suspend all pcms */
663 list_for_each_entry(rtd, &card->rtd_list, list) {
664 if (rtd->dai_link->ignore_suspend)
665 continue;
666
667 snd_pcm_suspend_all(rtd->pcm);
668 }
669
670 if (card->suspend_pre)
671 card->suspend_pre(card);
672
673 list_for_each_entry(rtd, &card->rtd_list, list) {
674 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
675
676 if (rtd->dai_link->ignore_suspend)
677 continue;
678
679 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
680 cpu_dai->driver->suspend(cpu_dai);
681 }
682
683 /* close any waiting streams */
684 list_for_each_entry(rtd, &card->rtd_list, list)
685 flush_delayed_work(&rtd->delayed_work);
686
687 list_for_each_entry(rtd, &card->rtd_list, list) {
688
689 if (rtd->dai_link->ignore_suspend)
690 continue;
691
692 snd_soc_dapm_stream_event(rtd,
693 SNDRV_PCM_STREAM_PLAYBACK,
694 SND_SOC_DAPM_STREAM_SUSPEND);
695
696 snd_soc_dapm_stream_event(rtd,
697 SNDRV_PCM_STREAM_CAPTURE,
698 SND_SOC_DAPM_STREAM_SUSPEND);
699 }
700
701 /* Recheck all endpoints too, their state is affected by suspend */
702 dapm_mark_endpoints_dirty(card);
703 snd_soc_dapm_sync(&card->dapm);
704
705 /* suspend all COMPONENTs */
706 list_for_each_entry(component, &card->component_dev_list, card_list) {
707 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
708
709 /* If there are paths active then the COMPONENT will be held with
710 * bias _ON and should not be suspended. */
711 if (!component->suspended) {
712 switch (snd_soc_dapm_get_bias_level(dapm)) {
713 case SND_SOC_BIAS_STANDBY:
714 /*
715 * If the COMPONENT is capable of idle
716 * bias off then being in STANDBY
717 * means it's doing something,
718 * otherwise fall through.
719 */
720 if (dapm->idle_bias_off) {
721 dev_dbg(component->dev,
722 "ASoC: idle_bias_off CODEC on over suspend\n");
723 break;
724 }
725
726 case SND_SOC_BIAS_OFF:
727 if (component->suspend)
728 component->suspend(component);
729 component->suspended = 1;
730 if (component->regmap)
731 regcache_mark_dirty(component->regmap);
732 /* deactivate pins to sleep state */
733 pinctrl_pm_select_sleep_state(component->dev);
734 break;
735 default:
736 dev_dbg(component->dev,
737 "ASoC: COMPONENT is on over suspend\n");
738 break;
739 }
740 }
741 }
742
743 list_for_each_entry(rtd, &card->rtd_list, list) {
744 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
745
746 if (rtd->dai_link->ignore_suspend)
747 continue;
748
749 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
750 cpu_dai->driver->suspend(cpu_dai);
751
752 /* deactivate pins to sleep state */
753 pinctrl_pm_select_sleep_state(cpu_dai->dev);
754 }
755
756 if (card->suspend_post)
757 card->suspend_post(card);
758
759 return 0;
760}
761EXPORT_SYMBOL_GPL(snd_soc_suspend);
762
763/* deferred resume work, so resume can complete before we finished
764 * setting our codec back up, which can be very slow on I2C
765 */
766static void soc_resume_deferred(struct work_struct *work)
767{
768 struct snd_soc_card *card =
769 container_of(work, struct snd_soc_card, deferred_resume_work);
770 struct snd_soc_pcm_runtime *rtd;
771 struct snd_soc_component *component;
772 int i;
773
774 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
775 * so userspace apps are blocked from touching us
776 */
777
778 dev_dbg(card->dev, "ASoC: starting resume work\n");
779
780 /* Bring us up into D2 so that DAPM starts enabling things */
781 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
782
783 if (card->resume_pre)
784 card->resume_pre(card);
785
786 /* resume control bus DAIs */
787 list_for_each_entry(rtd, &card->rtd_list, list) {
788 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
789
790 if (rtd->dai_link->ignore_suspend)
791 continue;
792
793 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
794 cpu_dai->driver->resume(cpu_dai);
795 }
796
797 list_for_each_entry(component, &card->component_dev_list, card_list) {
798 if (component->suspended) {
799 if (component->resume)
800 component->resume(component);
801 component->suspended = 0;
802 }
803 }
804
805 list_for_each_entry(rtd, &card->rtd_list, list) {
806
807 if (rtd->dai_link->ignore_suspend)
808 continue;
809
810 snd_soc_dapm_stream_event(rtd,
811 SNDRV_PCM_STREAM_PLAYBACK,
812 SND_SOC_DAPM_STREAM_RESUME);
813
814 snd_soc_dapm_stream_event(rtd,
815 SNDRV_PCM_STREAM_CAPTURE,
816 SND_SOC_DAPM_STREAM_RESUME);
817 }
818
819 /* unmute any active DACs */
820 list_for_each_entry(rtd, &card->rtd_list, list) {
821
822 if (rtd->dai_link->ignore_suspend)
823 continue;
824
825 for (i = 0; i < rtd->num_codecs; i++) {
826 struct snd_soc_dai *dai = rtd->codec_dais[i];
827 struct snd_soc_dai_driver *drv = dai->driver;
828
829 if (drv->ops->digital_mute && dai->playback_active)
830 drv->ops->digital_mute(dai, 0);
831 }
832 }
833
834 list_for_each_entry(rtd, &card->rtd_list, list) {
835 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
836
837 if (rtd->dai_link->ignore_suspend)
838 continue;
839
840 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
841 cpu_dai->driver->resume(cpu_dai);
842 }
843
844 if (card->resume_post)
845 card->resume_post(card);
846
847 dev_dbg(card->dev, "ASoC: resume work completed\n");
848
849 /* Recheck all endpoints too, their state is affected by suspend */
850 dapm_mark_endpoints_dirty(card);
851 snd_soc_dapm_sync(&card->dapm);
852
853 /* userspace can access us now we are back as we were before */
854 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
855}
856
857/* powers up audio subsystem after a suspend */
858int snd_soc_resume(struct device *dev)
859{
860 struct snd_soc_card *card = dev_get_drvdata(dev);
861 bool bus_control = false;
862 struct snd_soc_pcm_runtime *rtd;
863
864 /* If the card is not initialized yet there is nothing to do */
865 if (!card->instantiated)
866 return 0;
867
868 /* activate pins from sleep state */
869 list_for_each_entry(rtd, &card->rtd_list, list) {
870 struct snd_soc_dai **codec_dais = rtd->codec_dais;
871 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
872 int j;
873
874 if (cpu_dai->active)
875 pinctrl_pm_select_default_state(cpu_dai->dev);
876
877 for (j = 0; j < rtd->num_codecs; j++) {
878 struct snd_soc_dai *codec_dai = codec_dais[j];
879 if (codec_dai->active)
880 pinctrl_pm_select_default_state(codec_dai->dev);
881 }
882 }
883
884 /*
885 * DAIs that also act as the control bus master might have other drivers
886 * hanging off them so need to resume immediately. Other drivers don't
887 * have that problem and may take a substantial amount of time to resume
888 * due to I/O costs and anti-pop so handle them out of line.
889 */
890 list_for_each_entry(rtd, &card->rtd_list, list) {
891 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
892 bus_control |= cpu_dai->driver->bus_control;
893 }
894 if (bus_control) {
895 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
896 soc_resume_deferred(&card->deferred_resume_work);
897 } else {
898 dev_dbg(dev, "ASoC: Scheduling resume work\n");
899 if (!schedule_work(&card->deferred_resume_work))
900 dev_err(dev, "ASoC: resume work item may be lost\n");
901 }
902
903 return 0;
904}
905EXPORT_SYMBOL_GPL(snd_soc_resume);
906#else
907#define snd_soc_suspend NULL
908#define snd_soc_resume NULL
909#endif
910
911static const struct snd_soc_dai_ops null_dai_ops = {
912};
913
914static struct snd_soc_component *soc_find_component(
915 const struct device_node *of_node, const char *name)
916{
917 struct snd_soc_component *component;
918
919 lockdep_assert_held(&client_mutex);
920
921 list_for_each_entry(component, &component_list, list) {
922 if (of_node) {
923 if (component->dev->of_node == of_node)
924 return component;
925 } else if (strcmp(component->name, name) == 0) {
926 return component;
927 }
928 }
929
930 return NULL;
931}
932
933/**
934 * snd_soc_find_dai - Find a registered DAI
935 *
936 * @dlc: name of the DAI and optional component info to match
937 *
938 * This function will search all regsitered components and their DAIs to
939 * find the DAI of the same name. The component's of_node and name
940 * should also match if being specified.
941 *
942 * Return: pointer of DAI, or NULL if not found.
943 */
944struct snd_soc_dai *snd_soc_find_dai(
945 const struct snd_soc_dai_link_component *dlc)
946{
947 struct snd_soc_component *component;
948 struct snd_soc_dai *dai;
949 struct device_node *component_of_node;
950
951 lockdep_assert_held(&client_mutex);
952
953 /* Find CPU DAI from registered DAIs*/
954 list_for_each_entry(component, &component_list, list) {
955 component_of_node = component->dev->of_node;
956 if (!component_of_node && component->dev->parent)
957 component_of_node = component->dev->parent->of_node;
958
959 if (dlc->of_node && component_of_node != dlc->of_node)
960 continue;
961 if (dlc->name && strcmp(component->name, dlc->name))
962 continue;
963 list_for_each_entry(dai, &component->dai_list, list) {
964 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
965 continue;
966
967 return dai;
968 }
969 }
970
971 return NULL;
972}
973EXPORT_SYMBOL_GPL(snd_soc_find_dai);
974
975
976/**
977 * snd_soc_find_dai_link - Find a DAI link
978 *
979 * @card: soc card
980 * @id: DAI link ID to match
981 * @name: DAI link name to match, optional
982 * @stream name: DAI link stream name to match, optional
983 *
984 * This function will search all existing DAI links of the soc card to
985 * find the link of the same ID. Since DAI links may not have their
986 * unique ID, so name and stream name should also match if being
987 * specified.
988 *
989 * Return: pointer of DAI link, or NULL if not found.
990 */
991struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
992 int id, const char *name,
993 const char *stream_name)
994{
995 struct snd_soc_dai_link *link, *_link;
996
997 lockdep_assert_held(&client_mutex);
998
999 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1000 if (link->id != id)
1001 continue;
1002
1003 if (name && (!link->name || strcmp(name, link->name)))
1004 continue;
1005
1006 if (stream_name && (!link->stream_name
1007 || strcmp(stream_name, link->stream_name)))
1008 continue;
1009
1010 return link;
1011 }
1012
1013 return NULL;
1014}
1015EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1016
1017static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1018 struct snd_soc_dai_link *dai_link)
1019{
1020 struct snd_soc_pcm_runtime *rtd;
1021
1022 list_for_each_entry(rtd, &card->rtd_list, list) {
1023 if (rtd->dai_link == dai_link)
1024 return true;
1025 }
1026
1027 return false;
1028}
1029
1030static int soc_bind_dai_link(struct snd_soc_card *card,
1031 struct snd_soc_dai_link *dai_link)
1032{
1033 struct snd_soc_pcm_runtime *rtd;
1034 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1035 struct snd_soc_dai_link_component cpu_dai_component;
1036 struct snd_soc_dai **codec_dais;
1037 struct snd_soc_platform *platform;
1038 struct device_node *platform_of_node;
1039 const char *platform_name;
1040 int i;
1041
1042 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1043
1044 if (soc_is_dai_link_bound(card, dai_link)) {
1045 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1046 dai_link->name);
1047 return 0;
1048 }
1049
1050 rtd = soc_new_pcm_runtime(card, dai_link);
1051 if (!rtd)
1052 return -ENOMEM;
1053
1054 cpu_dai_component.name = dai_link->cpu_name;
1055 cpu_dai_component.of_node = dai_link->cpu_of_node;
1056 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1057 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1058 if (!rtd->cpu_dai) {
1059 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1060 dai_link->cpu_dai_name);
1061 goto _err_defer;
1062 }
1063
1064 rtd->num_codecs = dai_link->num_codecs;
1065
1066 /* Find CODEC from registered CODECs */
1067 codec_dais = rtd->codec_dais;
1068 for (i = 0; i < rtd->num_codecs; i++) {
1069 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1070 if (!codec_dais[i]) {
1071 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1072 codecs[i].dai_name);
1073 goto _err_defer;
1074 }
1075 }
1076
1077 /* Single codec links expect codec and codec_dai in runtime data */
1078 rtd->codec_dai = codec_dais[0];
1079 rtd->codec = rtd->codec_dai->codec;
1080
1081 /* if there's no platform we match on the empty platform */
1082 platform_name = dai_link->platform_name;
1083 if (!platform_name && !dai_link->platform_of_node)
1084 platform_name = "snd-soc-dummy";
1085
1086 /* find one from the set of registered platforms */
1087 list_for_each_entry(platform, &platform_list, list) {
1088 platform_of_node = platform->dev->of_node;
1089 if (!platform_of_node && platform->dev->parent->of_node)
1090 platform_of_node = platform->dev->parent->of_node;
1091
1092 if (dai_link->platform_of_node) {
1093 if (platform_of_node != dai_link->platform_of_node)
1094 continue;
1095 } else {
1096 if (strcmp(platform->component.name, platform_name))
1097 continue;
1098 }
1099
1100 rtd->platform = platform;
1101 }
1102 if (!rtd->platform) {
1103 dev_err(card->dev, "ASoC: platform %s not registered\n",
1104 dai_link->platform_name);
1105 goto _err_defer;
1106 }
1107
1108 soc_add_pcm_runtime(card, rtd);
1109 return 0;
1110
1111_err_defer:
1112 soc_free_pcm_runtime(rtd);
1113 return -EPROBE_DEFER;
1114}
1115
1116static void soc_remove_component(struct snd_soc_component *component)
1117{
1118 if (!component->card)
1119 return;
1120
1121 list_del(&component->card_list);
1122
1123 if (component->remove)
1124 component->remove(component);
1125
1126 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1127
1128 soc_cleanup_component_debugfs(component);
1129 component->card = NULL;
1130 module_put(component->dev->driver->owner);
1131}
1132
1133static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1134{
1135 int err;
1136
1137 if (dai && dai->probed &&
1138 dai->driver->remove_order == order) {
1139 if (dai->driver->remove) {
1140 err = dai->driver->remove(dai);
1141 if (err < 0)
1142 dev_err(dai->dev,
1143 "ASoC: failed to remove %s: %d\n",
1144 dai->name, err);
1145 }
1146 dai->probed = 0;
1147 }
1148}
1149
1150static void soc_remove_link_dais(struct snd_soc_card *card,
1151 struct snd_soc_pcm_runtime *rtd, int order)
1152{
1153 int i;
1154
1155 /* unregister the rtd device */
1156 if (rtd->dev_registered) {
1157 device_unregister(rtd->dev);
1158 rtd->dev_registered = 0;
1159 }
1160
1161 /* remove the CODEC DAI */
1162 for (i = 0; i < rtd->num_codecs; i++)
1163 soc_remove_dai(rtd->codec_dais[i], order);
1164
1165 soc_remove_dai(rtd->cpu_dai, order);
1166}
1167
1168static void soc_remove_link_components(struct snd_soc_card *card,
1169 struct snd_soc_pcm_runtime *rtd, int order)
1170{
1171 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1172 struct snd_soc_platform *platform = rtd->platform;
1173 struct snd_soc_component *component;
1174 int i;
1175
1176 /* remove the platform */
1177 if (platform && platform->component.driver->remove_order == order)
1178 soc_remove_component(&platform->component);
1179
1180 /* remove the CODEC-side CODEC */
1181 for (i = 0; i < rtd->num_codecs; i++) {
1182 component = rtd->codec_dais[i]->component;
1183 if (component->driver->remove_order == order)
1184 soc_remove_component(component);
1185 }
1186
1187 /* remove any CPU-side CODEC */
1188 if (cpu_dai) {
1189 if (cpu_dai->component->driver->remove_order == order)
1190 soc_remove_component(cpu_dai->component);
1191 }
1192}
1193
1194static void soc_remove_dai_links(struct snd_soc_card *card)
1195{
1196 int order;
1197 struct snd_soc_pcm_runtime *rtd;
1198 struct snd_soc_dai_link *link, *_link;
1199
1200 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1201 order++) {
1202 list_for_each_entry(rtd, &card->rtd_list, list)
1203 soc_remove_link_dais(card, rtd, order);
1204 }
1205
1206 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1207 order++) {
1208 list_for_each_entry(rtd, &card->rtd_list, list)
1209 soc_remove_link_components(card, rtd, order);
1210 }
1211
1212 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1213 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1214 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1215 link->name);
1216
1217 list_del(&link->list);
1218 card->num_dai_links--;
1219 }
1220}
1221
1222static int snd_soc_init_multicodec(struct snd_soc_card *card,
1223 struct snd_soc_dai_link *dai_link)
1224{
1225 /* Legacy codec/codec_dai link is a single entry in multicodec */
1226 if (dai_link->codec_name || dai_link->codec_of_node ||
1227 dai_link->codec_dai_name) {
1228 dai_link->num_codecs = 1;
1229
1230 dai_link->codecs = devm_kzalloc(card->dev,
1231 sizeof(struct snd_soc_dai_link_component),
1232 GFP_KERNEL);
1233 if (!dai_link->codecs)
1234 return -ENOMEM;
1235
1236 dai_link->codecs[0].name = dai_link->codec_name;
1237 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1238 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1239 }
1240
1241 if (!dai_link->codecs) {
1242 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1243 return -EINVAL;
1244 }
1245
1246 return 0;
1247}
1248
1249static int soc_init_dai_link(struct snd_soc_card *card,
1250 struct snd_soc_dai_link *link)
1251{
1252 int i, ret;
1253
1254 ret = snd_soc_init_multicodec(card, link);
1255 if (ret) {
1256 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1257 return ret;
1258 }
1259
1260 for (i = 0; i < link->num_codecs; i++) {
1261 /*
1262 * Codec must be specified by 1 of name or OF node,
1263 * not both or neither.
1264 */
1265 if (!!link->codecs[i].name ==
1266 !!link->codecs[i].of_node) {
1267 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1268 link->name);
1269 return -EINVAL;
1270 }
1271 /* Codec DAI name must be specified */
1272 if (!link->codecs[i].dai_name) {
1273 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1274 link->name);
1275 return -EINVAL;
1276 }
1277 }
1278
1279 /*
1280 * Platform may be specified by either name or OF node, but
1281 * can be left unspecified, and a dummy platform will be used.
1282 */
1283 if (link->platform_name && link->platform_of_node) {
1284 dev_err(card->dev,
1285 "ASoC: Both platform name/of_node are set for %s\n",
1286 link->name);
1287 return -EINVAL;
1288 }
1289
1290 /*
1291 * CPU device may be specified by either name or OF node, but
1292 * can be left unspecified, and will be matched based on DAI
1293 * name alone..
1294 */
1295 if (link->cpu_name && link->cpu_of_node) {
1296 dev_err(card->dev,
1297 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1298 link->name);
1299 return -EINVAL;
1300 }
1301 /*
1302 * At least one of CPU DAI name or CPU device name/node must be
1303 * specified
1304 */
1305 if (!link->cpu_dai_name &&
1306 !(link->cpu_name || link->cpu_of_node)) {
1307 dev_err(card->dev,
1308 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1309 link->name);
1310 return -EINVAL;
1311 }
1312
1313 return 0;
1314}
1315
1316/**
1317 * snd_soc_add_dai_link - Add a DAI link dynamically
1318 * @card: The ASoC card to which the DAI link is added
1319 * @dai_link: The new DAI link to add
1320 *
1321 * This function adds a DAI link to the ASoC card's link list.
1322 *
1323 * Note: Topology can use this API to add DAI links when probing the
1324 * topology component. And machine drivers can still define static
1325 * DAI links in dai_link array.
1326 */
1327int snd_soc_add_dai_link(struct snd_soc_card *card,
1328 struct snd_soc_dai_link *dai_link)
1329{
1330 if (dai_link->dobj.type
1331 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1332 dev_err(card->dev, "Invalid dai link type %d\n",
1333 dai_link->dobj.type);
1334 return -EINVAL;
1335 }
1336
1337 lockdep_assert_held(&client_mutex);
1338 /* Notify the machine driver for extra initialization
1339 * on the link created by topology.
1340 */
1341 if (dai_link->dobj.type && card->add_dai_link)
1342 card->add_dai_link(card, dai_link);
1343
1344 list_add_tail(&dai_link->list, &card->dai_link_list);
1345 card->num_dai_links++;
1346
1347 return 0;
1348}
1349EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1350
1351/**
1352 * snd_soc_remove_dai_link - Remove a DAI link from the list
1353 * @card: The ASoC card that owns the link
1354 * @dai_link: The DAI link to remove
1355 *
1356 * This function removes a DAI link from the ASoC card's link list.
1357 *
1358 * For DAI links previously added by topology, topology should
1359 * remove them by using the dobj embedded in the link.
1360 */
1361void snd_soc_remove_dai_link(struct snd_soc_card *card,
1362 struct snd_soc_dai_link *dai_link)
1363{
1364 struct snd_soc_dai_link *link, *_link;
1365
1366 if (dai_link->dobj.type
1367 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1368 dev_err(card->dev, "Invalid dai link type %d\n",
1369 dai_link->dobj.type);
1370 return;
1371 }
1372
1373 lockdep_assert_held(&client_mutex);
1374 /* Notify the machine driver for extra destruction
1375 * on the link created by topology.
1376 */
1377 if (dai_link->dobj.type && card->remove_dai_link)
1378 card->remove_dai_link(card, dai_link);
1379
1380 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1381 if (link == dai_link) {
1382 list_del(&link->list);
1383 card->num_dai_links--;
1384 return;
1385 }
1386 }
1387}
1388EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1389
1390static void soc_set_name_prefix(struct snd_soc_card *card,
1391 struct snd_soc_component *component)
1392{
1393 int i;
1394
1395 if (card->codec_conf == NULL)
1396 return;
1397
1398 for (i = 0; i < card->num_configs; i++) {
1399 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1400 if (map->of_node && component->dev->of_node != map->of_node)
1401 continue;
1402 if (map->dev_name && strcmp(component->name, map->dev_name))
1403 continue;
1404 component->name_prefix = map->name_prefix;
1405 break;
1406 }
1407}
1408
1409static int soc_probe_component(struct snd_soc_card *card,
1410 struct snd_soc_component *component)
1411{
1412 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1413 struct snd_soc_dai *dai;
1414 int ret;
1415
1416 if (!strcmp(component->name, "snd-soc-dummy"))
1417 return 0;
1418
1419 if (component->card) {
1420 if (component->card != card) {
1421 dev_err(component->dev,
1422 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1423 card->name, component->card->name);
1424 return -ENODEV;
1425 }
1426 return 0;
1427 }
1428
1429 if (!try_module_get(component->dev->driver->owner))
1430 return -ENODEV;
1431
1432 component->card = card;
1433 dapm->card = card;
1434 soc_set_name_prefix(card, component);
1435
1436 soc_init_component_debugfs(component);
1437
1438 if (component->dapm_widgets) {
1439 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1440 component->num_dapm_widgets);
1441
1442 if (ret != 0) {
1443 dev_err(component->dev,
1444 "Failed to create new controls %d\n", ret);
1445 goto err_probe;
1446 }
1447 }
1448
1449 list_for_each_entry(dai, &component->dai_list, list) {
1450 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1451 if (ret != 0) {
1452 dev_err(component->dev,
1453 "Failed to create DAI widgets %d\n", ret);
1454 goto err_probe;
1455 }
1456 }
1457
1458 if (component->probe) {
1459 ret = component->probe(component);
1460 if (ret < 0) {
1461 dev_err(component->dev,
1462 "ASoC: failed to probe component %d\n", ret);
1463 goto err_probe;
1464 }
1465
1466 WARN(dapm->idle_bias_off &&
1467 dapm->bias_level != SND_SOC_BIAS_OFF,
1468 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1469 component->name);
1470 }
1471
1472 /* machine specific init */
1473 if (component->init) {
1474 ret = component->init(component);
1475 if (ret < 0) {
1476 dev_err(component->dev,
1477 "Failed to do machine specific init %d\n", ret);
1478 goto err_probe;
1479 }
1480 }
1481
1482 if (component->controls)
1483 snd_soc_add_component_controls(component, component->controls,
1484 component->num_controls);
1485 if (component->dapm_routes)
1486 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1487 component->num_dapm_routes);
1488
1489 list_add(&dapm->list, &card->dapm_list);
1490 list_add(&component->card_list, &card->component_dev_list);
1491
1492 return 0;
1493
1494err_probe:
1495 soc_cleanup_component_debugfs(component);
1496 component->card = NULL;
1497 module_put(component->dev->driver->owner);
1498
1499 return ret;
1500}
1501
1502static void rtd_release(struct device *dev)
1503{
1504 kfree(dev);
1505}
1506
1507static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1508 const char *name)
1509{
1510 int ret = 0;
1511
1512 /* register the rtd device */
1513 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1514 if (!rtd->dev)
1515 return -ENOMEM;
1516 device_initialize(rtd->dev);
1517 rtd->dev->parent = rtd->card->dev;
1518 rtd->dev->release = rtd_release;
1519 rtd->dev->groups = soc_dev_attr_groups;
1520 dev_set_name(rtd->dev, "%s", name);
1521 dev_set_drvdata(rtd->dev, rtd);
1522 mutex_init(&rtd->pcm_mutex);
1523 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1524 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1525 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1526 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1527 ret = device_add(rtd->dev);
1528 if (ret < 0) {
1529 /* calling put_device() here to free the rtd->dev */
1530 put_device(rtd->dev);
1531 dev_err(rtd->card->dev,
1532 "ASoC: failed to register runtime device: %d\n", ret);
1533 return ret;
1534 }
1535 rtd->dev_registered = 1;
1536 return 0;
1537}
1538
1539static int soc_probe_link_components(struct snd_soc_card *card,
1540 struct snd_soc_pcm_runtime *rtd,
1541 int order)
1542{
1543 struct snd_soc_platform *platform = rtd->platform;
1544 struct snd_soc_component *component;
1545 int i, ret;
1546
1547 /* probe the CPU-side component, if it is a CODEC */
1548 component = rtd->cpu_dai->component;
1549 if (component->driver->probe_order == order) {
1550 ret = soc_probe_component(card, component);
1551 if (ret < 0)
1552 return ret;
1553 }
1554
1555 /* probe the CODEC-side components */
1556 for (i = 0; i < rtd->num_codecs; i++) {
1557 component = rtd->codec_dais[i]->component;
1558 if (component->driver->probe_order == order) {
1559 ret = soc_probe_component(card, component);
1560 if (ret < 0)
1561 return ret;
1562 }
1563 }
1564
1565 /* probe the platform */
1566 if (platform->component.driver->probe_order == order) {
1567 ret = soc_probe_component(card, &platform->component);
1568 if (ret < 0)
1569 return ret;
1570 }
1571
1572 return 0;
1573}
1574
1575static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1576{
1577 int ret;
1578
1579 if (!dai->probed && dai->driver->probe_order == order) {
1580 if (dai->driver->probe) {
1581 ret = dai->driver->probe(dai);
1582 if (ret < 0) {
1583 dev_err(dai->dev,
1584 "ASoC: failed to probe DAI %s: %d\n",
1585 dai->name, ret);
1586 return ret;
1587 }
1588 }
1589
1590 dai->probed = 1;
1591 }
1592
1593 return 0;
1594}
1595
1596static int soc_link_dai_widgets(struct snd_soc_card *card,
1597 struct snd_soc_dai_link *dai_link,
1598 struct snd_soc_pcm_runtime *rtd)
1599{
1600 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1601 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1602 struct snd_soc_dapm_widget *sink, *source;
1603 int ret;
1604
1605 if (rtd->num_codecs > 1)
1606 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1607
1608 /* link the DAI widgets */
1609 sink = codec_dai->playback_widget;
1610 source = cpu_dai->capture_widget;
1611 if (sink && source) {
1612 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1613 dai_link->num_params,
1614 source, sink);
1615 if (ret != 0) {
1616 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1617 sink->name, source->name, ret);
1618 return ret;
1619 }
1620 }
1621
1622 sink = cpu_dai->playback_widget;
1623 source = codec_dai->capture_widget;
1624 if (sink && source) {
1625 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1626 dai_link->num_params,
1627 source, sink);
1628 if (ret != 0) {
1629 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1630 sink->name, source->name, ret);
1631 return ret;
1632 }
1633 }
1634
1635 return 0;
1636}
1637
1638static int soc_probe_link_dais(struct snd_soc_card *card,
1639 struct snd_soc_pcm_runtime *rtd, int order)
1640{
1641 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1642 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1643 int i, ret;
1644
1645 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1646 card->name, rtd->num, order);
1647
1648 /* set default power off timeout */
1649 rtd->pmdown_time = pmdown_time;
1650
1651 ret = soc_probe_dai(cpu_dai, order);
1652 if (ret)
1653 return ret;
1654
1655 /* probe the CODEC DAI */
1656 for (i = 0; i < rtd->num_codecs; i++) {
1657 ret = soc_probe_dai(rtd->codec_dais[i], order);
1658 if (ret)
1659 return ret;
1660 }
1661
1662 /* complete DAI probe during last probe */
1663 if (order != SND_SOC_COMP_ORDER_LAST)
1664 return 0;
1665
1666 /* do machine specific initialization */
1667 if (dai_link->init) {
1668 ret = dai_link->init(rtd);
1669 if (ret < 0) {
1670 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1671 dai_link->name, ret);
1672 return ret;
1673 }
1674 }
1675
1676 if (dai_link->dai_fmt)
1677 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1678
1679 ret = soc_post_component_init(rtd, dai_link->name);
1680 if (ret)
1681 return ret;
1682
1683#ifdef CONFIG_DEBUG_FS
1684 /* add DPCM sysfs entries */
1685 if (dai_link->dynamic)
1686 soc_dpcm_debugfs_add(rtd);
1687#endif
1688
1689 if (cpu_dai->driver->compress_new) {
1690 /*create compress_device"*/
1691 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1692 if (ret < 0) {
1693 dev_err(card->dev, "ASoC: can't create compress %s\n",
1694 dai_link->stream_name);
1695 return ret;
1696 }
1697 } else {
1698
1699 if (!dai_link->params) {
1700 /* create the pcm */
1701 ret = soc_new_pcm(rtd, rtd->num);
1702 if (ret < 0) {
1703 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1704 dai_link->stream_name, ret);
1705 return ret;
1706 }
1707 } else {
1708 INIT_DELAYED_WORK(&rtd->delayed_work,
1709 codec2codec_close_delayed_work);
1710
1711 /* link the DAI widgets */
1712 ret = soc_link_dai_widgets(card, dai_link, rtd);
1713 if (ret)
1714 return ret;
1715 }
1716 }
1717
1718 return 0;
1719}
1720
1721static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1722{
1723 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1724 struct snd_soc_component *component;
1725 const char *name;
1726 struct device_node *codec_of_node;
1727
1728 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1729 /* codecs, usually analog devices */
1730 name = aux_dev->codec_name;
1731 codec_of_node = aux_dev->codec_of_node;
1732 component = soc_find_component(codec_of_node, name);
1733 if (!component) {
1734 if (codec_of_node)
1735 name = of_node_full_name(codec_of_node);
1736 goto err_defer;
1737 }
1738 } else if (aux_dev->name) {
1739 /* generic components */
1740 name = aux_dev->name;
1741 component = soc_find_component(NULL, name);
1742 if (!component)
1743 goto err_defer;
1744 } else {
1745 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1746 return -EINVAL;
1747 }
1748
1749 component->init = aux_dev->init;
1750 component->auxiliary = 1;
1751 list_add(&component->card_aux_list, &card->aux_comp_list);
1752
1753 return 0;
1754
1755err_defer:
1756 dev_err(card->dev, "ASoC: %s not registered\n", name);
1757 return -EPROBE_DEFER;
1758}
1759
1760static int soc_probe_aux_devices(struct snd_soc_card *card)
1761{
1762 struct snd_soc_component *comp, *tmp;
1763 int order;
1764 int ret;
1765
1766 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1767 order++) {
1768 list_for_each_entry_safe(comp, tmp, &card->aux_comp_list,
1769 card_aux_list) {
1770 if (comp->driver->probe_order == order) {
1771 ret = soc_probe_component(card, comp);
1772 if (ret < 0) {
1773 dev_err(card->dev,
1774 "ASoC: failed to probe aux component %s %d\n",
1775 comp->name, ret);
1776 return ret;
1777 }
1778 list_del(&comp->card_aux_list);
1779 }
1780 }
1781 }
1782
1783 return 0;
1784}
1785
1786static void soc_remove_aux_devices(struct snd_soc_card *card)
1787{
1788 struct snd_soc_component *comp, *_comp;
1789 int order;
1790
1791 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1792 order++) {
1793 list_for_each_entry_safe(comp, _comp,
1794 &card->component_dev_list, card_list) {
1795
1796 if (!comp->auxiliary)
1797 continue;
1798
1799 if (comp->driver->remove_order == order) {
1800 soc_remove_component(comp);
1801 comp->auxiliary = 0;
1802 }
1803 }
1804 }
1805}
1806
1807static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1808{
1809 int ret;
1810
1811 if (codec->cache_init)
1812 return 0;
1813
1814 ret = snd_soc_cache_init(codec);
1815 if (ret < 0) {
1816 dev_err(codec->dev,
1817 "ASoC: Failed to set cache compression type: %d\n",
1818 ret);
1819 return ret;
1820 }
1821 codec->cache_init = 1;
1822 return 0;
1823}
1824
1825/**
1826 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1827 * @rtd: The runtime for which the DAI link format should be changed
1828 * @dai_fmt: The new DAI link format
1829 *
1830 * This function updates the DAI link format for all DAIs connected to the DAI
1831 * link for the specified runtime.
1832 *
1833 * Note: For setups with a static format set the dai_fmt field in the
1834 * corresponding snd_dai_link struct instead of using this function.
1835 *
1836 * Returns 0 on success, otherwise a negative error code.
1837 */
1838int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1839 unsigned int dai_fmt)
1840{
1841 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1842 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1843 unsigned int i;
1844 int ret;
1845
1846 for (i = 0; i < rtd->num_codecs; i++) {
1847 struct snd_soc_dai *codec_dai = codec_dais[i];
1848
1849 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1850 if (ret != 0 && ret != -ENOTSUPP) {
1851 dev_warn(codec_dai->dev,
1852 "ASoC: Failed to set DAI format: %d\n", ret);
1853 return ret;
1854 }
1855 }
1856
1857 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1858 if (cpu_dai->codec) {
1859 unsigned int inv_dai_fmt;
1860
1861 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1862 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1863 case SND_SOC_DAIFMT_CBM_CFM:
1864 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1865 break;
1866 case SND_SOC_DAIFMT_CBM_CFS:
1867 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1868 break;
1869 case SND_SOC_DAIFMT_CBS_CFM:
1870 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1871 break;
1872 case SND_SOC_DAIFMT_CBS_CFS:
1873 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1874 break;
1875 }
1876
1877 dai_fmt = inv_dai_fmt;
1878 }
1879
1880 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1881 if (ret != 0 && ret != -ENOTSUPP) {
1882 dev_warn(cpu_dai->dev,
1883 "ASoC: Failed to set DAI format: %d\n", ret);
1884 return ret;
1885 }
1886
1887 return 0;
1888}
1889EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1890
1891static int snd_soc_instantiate_card(struct snd_soc_card *card)
1892{
1893 struct snd_soc_codec *codec;
1894 struct snd_soc_pcm_runtime *rtd;
1895 struct snd_soc_dai_link *dai_link;
1896 int ret, i, order;
1897
1898 mutex_lock(&client_mutex);
1899 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1900
1901 /* bind DAIs */
1902 for (i = 0; i < card->num_links; i++) {
1903 ret = soc_bind_dai_link(card, &card->dai_link[i]);
1904 if (ret != 0)
1905 goto base_error;
1906 }
1907
1908 /* bind aux_devs too */
1909 for (i = 0; i < card->num_aux_devs; i++) {
1910 ret = soc_bind_aux_dev(card, i);
1911 if (ret != 0)
1912 goto base_error;
1913 }
1914
1915 /* add predefined DAI links to the list */
1916 for (i = 0; i < card->num_links; i++)
1917 snd_soc_add_dai_link(card, card->dai_link+i);
1918
1919 /* initialize the register cache for each available codec */
1920 list_for_each_entry(codec, &codec_list, list) {
1921 if (codec->cache_init)
1922 continue;
1923 ret = snd_soc_init_codec_cache(codec);
1924 if (ret < 0)
1925 goto base_error;
1926 }
1927
1928 /* card bind complete so register a sound card */
1929 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1930 card->owner, 0, &card->snd_card);
1931 if (ret < 0) {
1932 dev_err(card->dev,
1933 "ASoC: can't create sound card for card %s: %d\n",
1934 card->name, ret);
1935 goto base_error;
1936 }
1937
1938 soc_init_card_debugfs(card);
1939
1940 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1941 card->dapm.dev = card->dev;
1942 card->dapm.card = card;
1943 list_add(&card->dapm.list, &card->dapm_list);
1944
1945#ifdef CONFIG_DEBUG_FS
1946 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1947#endif
1948
1949#ifdef CONFIG_PM_SLEEP
1950 /* deferred resume work */
1951 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1952#endif
1953
1954 if (card->dapm_widgets)
1955 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1956 card->num_dapm_widgets);
1957
1958 if (card->of_dapm_widgets)
1959 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1960 card->num_of_dapm_widgets);
1961
1962 /* initialise the sound card only once */
1963 if (card->probe) {
1964 ret = card->probe(card);
1965 if (ret < 0)
1966 goto card_probe_error;
1967 }
1968
1969 /* probe all components used by DAI links on this card */
1970 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1971 order++) {
1972 list_for_each_entry(rtd, &card->rtd_list, list) {
1973 ret = soc_probe_link_components(card, rtd, order);
1974 if (ret < 0) {
1975 dev_err(card->dev,
1976 "ASoC: failed to instantiate card %d\n",
1977 ret);
1978 goto probe_dai_err;
1979 }
1980 }
1981 }
1982
1983 /* probe auxiliary components */
1984 ret = soc_probe_aux_devices(card);
1985 if (ret < 0)
1986 goto probe_dai_err;
1987
1988 /* Find new DAI links added during probing components and bind them.
1989 * Components with topology may bring new DAIs and DAI links.
1990 */
1991 list_for_each_entry(dai_link, &card->dai_link_list, list) {
1992 if (soc_is_dai_link_bound(card, dai_link))
1993 continue;
1994
1995 ret = soc_init_dai_link(card, dai_link);
1996 if (ret)
1997 goto probe_dai_err;
1998 ret = soc_bind_dai_link(card, dai_link);
1999 if (ret)
2000 goto probe_dai_err;
2001 }
2002
2003 /* probe all DAI links on this card */
2004 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2005 order++) {
2006 list_for_each_entry(rtd, &card->rtd_list, list) {
2007 ret = soc_probe_link_dais(card, rtd, order);
2008 if (ret < 0) {
2009 dev_err(card->dev,
2010 "ASoC: failed to instantiate card %d\n",
2011 ret);
2012 goto probe_dai_err;
2013 }
2014 }
2015 }
2016
2017 snd_soc_dapm_link_dai_widgets(card);
2018 snd_soc_dapm_connect_dai_link_widgets(card);
2019
2020 if (card->controls)
2021 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2022
2023 if (card->dapm_routes)
2024 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2025 card->num_dapm_routes);
2026
2027 if (card->of_dapm_routes)
2028 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2029 card->num_of_dapm_routes);
2030
2031 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2032 "%s", card->name);
2033 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2034 "%s", card->long_name ? card->long_name : card->name);
2035 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2036 "%s", card->driver_name ? card->driver_name : card->name);
2037 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2038 switch (card->snd_card->driver[i]) {
2039 case '_':
2040 case '-':
2041 case '\0':
2042 break;
2043 default:
2044 if (!isalnum(card->snd_card->driver[i]))
2045 card->snd_card->driver[i] = '_';
2046 break;
2047 }
2048 }
2049
2050 if (card->late_probe) {
2051 ret = card->late_probe(card);
2052 if (ret < 0) {
2053 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2054 card->name, ret);
2055 goto probe_aux_dev_err;
2056 }
2057 }
2058
2059 snd_soc_dapm_new_widgets(card);
2060
2061 ret = snd_card_register(card->snd_card);
2062 if (ret < 0) {
2063 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2064 ret);
2065 goto probe_aux_dev_err;
2066 }
2067
2068 card->instantiated = 1;
2069 snd_soc_dapm_sync(&card->dapm);
2070 mutex_unlock(&card->mutex);
2071 mutex_unlock(&client_mutex);
2072
2073 return 0;
2074
2075probe_aux_dev_err:
2076 soc_remove_aux_devices(card);
2077
2078probe_dai_err:
2079 soc_remove_dai_links(card);
2080
2081card_probe_error:
2082 if (card->remove)
2083 card->remove(card);
2084
2085 snd_soc_dapm_free(&card->dapm);
2086 soc_cleanup_card_debugfs(card);
2087 snd_card_free(card->snd_card);
2088
2089base_error:
2090 soc_remove_pcm_runtimes(card);
2091 mutex_unlock(&card->mutex);
2092 mutex_unlock(&client_mutex);
2093
2094 return ret;
2095}
2096
2097/* probes a new socdev */
2098static int soc_probe(struct platform_device *pdev)
2099{
2100 struct snd_soc_card *card = platform_get_drvdata(pdev);
2101
2102 /*
2103 * no card, so machine driver should be registering card
2104 * we should not be here in that case so ret error
2105 */
2106 if (!card)
2107 return -EINVAL;
2108
2109 dev_warn(&pdev->dev,
2110 "ASoC: machine %s should use snd_soc_register_card()\n",
2111 card->name);
2112
2113 /* Bodge while we unpick instantiation */
2114 card->dev = &pdev->dev;
2115
2116 return snd_soc_register_card(card);
2117}
2118
2119static int soc_cleanup_card_resources(struct snd_soc_card *card)
2120{
2121 struct snd_soc_pcm_runtime *rtd;
2122
2123 /* make sure any delayed work runs */
2124 list_for_each_entry(rtd, &card->rtd_list, list)
2125 flush_delayed_work(&rtd->delayed_work);
2126
2127 /* remove and free each DAI */
2128 soc_remove_dai_links(card);
2129 soc_remove_pcm_runtimes(card);
2130
2131 /* remove auxiliary devices */
2132 soc_remove_aux_devices(card);
2133
2134 snd_soc_dapm_free(&card->dapm);
2135 soc_cleanup_card_debugfs(card);
2136
2137 /* remove the card */
2138 if (card->remove)
2139 card->remove(card);
2140
2141 snd_card_free(card->snd_card);
2142 return 0;
2143
2144}
2145
2146/* removes a socdev */
2147static int soc_remove(struct platform_device *pdev)
2148{
2149 struct snd_soc_card *card = platform_get_drvdata(pdev);
2150
2151 snd_soc_unregister_card(card);
2152 return 0;
2153}
2154
2155int snd_soc_poweroff(struct device *dev)
2156{
2157 struct snd_soc_card *card = dev_get_drvdata(dev);
2158 struct snd_soc_pcm_runtime *rtd;
2159
2160 if (!card->instantiated)
2161 return 0;
2162
2163 /* Flush out pmdown_time work - we actually do want to run it
2164 * now, we're shutting down so no imminent restart. */
2165 list_for_each_entry(rtd, &card->rtd_list, list)
2166 flush_delayed_work(&rtd->delayed_work);
2167
2168 snd_soc_dapm_shutdown(card);
2169
2170 /* deactivate pins to sleep state */
2171 list_for_each_entry(rtd, &card->rtd_list, list) {
2172 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2173 int i;
2174
2175 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2176 for (i = 0; i < rtd->num_codecs; i++) {
2177 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2178 pinctrl_pm_select_sleep_state(codec_dai->dev);
2179 }
2180 }
2181
2182 return 0;
2183}
2184EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2185
2186const struct dev_pm_ops snd_soc_pm_ops = {
2187 .suspend = snd_soc_suspend,
2188 .resume = snd_soc_resume,
2189 .freeze = snd_soc_suspend,
2190 .thaw = snd_soc_resume,
2191 .poweroff = snd_soc_poweroff,
2192 .restore = snd_soc_resume,
2193};
2194EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2195
2196/* ASoC platform driver */
2197static struct platform_driver soc_driver = {
2198 .driver = {
2199 .name = "soc-audio",
2200 .pm = &snd_soc_pm_ops,
2201 },
2202 .probe = soc_probe,
2203 .remove = soc_remove,
2204};
2205
2206/**
2207 * snd_soc_cnew - create new control
2208 * @_template: control template
2209 * @data: control private data
2210 * @long_name: control long name
2211 * @prefix: control name prefix
2212 *
2213 * Create a new mixer control from a template control.
2214 *
2215 * Returns 0 for success, else error.
2216 */
2217struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2218 void *data, const char *long_name,
2219 const char *prefix)
2220{
2221 struct snd_kcontrol_new template;
2222 struct snd_kcontrol *kcontrol;
2223 char *name = NULL;
2224
2225 memcpy(&template, _template, sizeof(template));
2226 template.index = 0;
2227
2228 if (!long_name)
2229 long_name = template.name;
2230
2231 if (prefix) {
2232 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2233 if (!name)
2234 return NULL;
2235
2236 template.name = name;
2237 } else {
2238 template.name = long_name;
2239 }
2240
2241 kcontrol = snd_ctl_new1(&template, data);
2242
2243 kfree(name);
2244
2245 return kcontrol;
2246}
2247EXPORT_SYMBOL_GPL(snd_soc_cnew);
2248
2249static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2250 const struct snd_kcontrol_new *controls, int num_controls,
2251 const char *prefix, void *data)
2252{
2253 int err, i;
2254
2255 for (i = 0; i < num_controls; i++) {
2256 const struct snd_kcontrol_new *control = &controls[i];
2257 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2258 control->name, prefix));
2259 if (err < 0) {
2260 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2261 control->name, err);
2262 return err;
2263 }
2264 }
2265
2266 return 0;
2267}
2268
2269struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2270 const char *name)
2271{
2272 struct snd_card *card = soc_card->snd_card;
2273 struct snd_kcontrol *kctl;
2274
2275 if (unlikely(!name))
2276 return NULL;
2277
2278 list_for_each_entry(kctl, &card->controls, list)
2279 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2280 return kctl;
2281 return NULL;
2282}
2283EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2284
2285/**
2286 * snd_soc_add_component_controls - Add an array of controls to a component.
2287 *
2288 * @component: Component to add controls to
2289 * @controls: Array of controls to add
2290 * @num_controls: Number of elements in the array
2291 *
2292 * Return: 0 for success, else error.
2293 */
2294int snd_soc_add_component_controls(struct snd_soc_component *component,
2295 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2296{
2297 struct snd_card *card = component->card->snd_card;
2298
2299 return snd_soc_add_controls(card, component->dev, controls,
2300 num_controls, component->name_prefix, component);
2301}
2302EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2303
2304/**
2305 * snd_soc_add_codec_controls - add an array of controls to a codec.
2306 * Convenience function to add a list of controls. Many codecs were
2307 * duplicating this code.
2308 *
2309 * @codec: codec to add controls to
2310 * @controls: array of controls to add
2311 * @num_controls: number of elements in the array
2312 *
2313 * Return 0 for success, else error.
2314 */
2315int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2316 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2317{
2318 return snd_soc_add_component_controls(&codec->component, controls,
2319 num_controls);
2320}
2321EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2322
2323/**
2324 * snd_soc_add_platform_controls - add an array of controls to a platform.
2325 * Convenience function to add a list of controls.
2326 *
2327 * @platform: platform to add controls to
2328 * @controls: array of controls to add
2329 * @num_controls: number of elements in the array
2330 *
2331 * Return 0 for success, else error.
2332 */
2333int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2334 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2335{
2336 return snd_soc_add_component_controls(&platform->component, controls,
2337 num_controls);
2338}
2339EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2340
2341/**
2342 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2343 * Convenience function to add a list of controls.
2344 *
2345 * @soc_card: SoC card to add controls to
2346 * @controls: array of controls to add
2347 * @num_controls: number of elements in the array
2348 *
2349 * Return 0 for success, else error.
2350 */
2351int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2352 const struct snd_kcontrol_new *controls, int num_controls)
2353{
2354 struct snd_card *card = soc_card->snd_card;
2355
2356 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2357 NULL, soc_card);
2358}
2359EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2360
2361/**
2362 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2363 * Convienience function to add a list of controls.
2364 *
2365 * @dai: DAI to add controls to
2366 * @controls: array of controls to add
2367 * @num_controls: number of elements in the array
2368 *
2369 * Return 0 for success, else error.
2370 */
2371int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2372 const struct snd_kcontrol_new *controls, int num_controls)
2373{
2374 struct snd_card *card = dai->component->card->snd_card;
2375
2376 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2377 NULL, dai);
2378}
2379EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2380
2381/**
2382 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2383 * @dai: DAI
2384 * @clk_id: DAI specific clock ID
2385 * @freq: new clock frequency in Hz
2386 * @dir: new clock direction - input/output.
2387 *
2388 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2389 */
2390int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2391 unsigned int freq, int dir)
2392{
2393 if (dai->driver && dai->driver->ops->set_sysclk)
2394 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2395 else if (dai->codec && dai->codec->driver->set_sysclk)
2396 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2397 freq, dir);
2398 else
2399 return -ENOTSUPP;
2400}
2401EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2402
2403/**
2404 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2405 * @codec: CODEC
2406 * @clk_id: DAI specific clock ID
2407 * @source: Source for the clock
2408 * @freq: new clock frequency in Hz
2409 * @dir: new clock direction - input/output.
2410 *
2411 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2412 */
2413int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2414 int source, unsigned int freq, int dir)
2415{
2416 if (codec->driver->set_sysclk)
2417 return codec->driver->set_sysclk(codec, clk_id, source,
2418 freq, dir);
2419 else
2420 return -ENOTSUPP;
2421}
2422EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2423
2424/**
2425 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2426 * @dai: DAI
2427 * @div_id: DAI specific clock divider ID
2428 * @div: new clock divisor.
2429 *
2430 * Configures the clock dividers. This is used to derive the best DAI bit and
2431 * frame clocks from the system or master clock. It's best to set the DAI bit
2432 * and frame clocks as low as possible to save system power.
2433 */
2434int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2435 int div_id, int div)
2436{
2437 if (dai->driver && dai->driver->ops->set_clkdiv)
2438 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2439 else
2440 return -EINVAL;
2441}
2442EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2443
2444/**
2445 * snd_soc_dai_set_pll - configure DAI PLL.
2446 * @dai: DAI
2447 * @pll_id: DAI specific PLL ID
2448 * @source: DAI specific source for the PLL
2449 * @freq_in: PLL input clock frequency in Hz
2450 * @freq_out: requested PLL output clock frequency in Hz
2451 *
2452 * Configures and enables PLL to generate output clock based on input clock.
2453 */
2454int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2455 unsigned int freq_in, unsigned int freq_out)
2456{
2457 if (dai->driver && dai->driver->ops->set_pll)
2458 return dai->driver->ops->set_pll(dai, pll_id, source,
2459 freq_in, freq_out);
2460 else if (dai->codec && dai->codec->driver->set_pll)
2461 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2462 freq_in, freq_out);
2463 else
2464 return -EINVAL;
2465}
2466EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2467
2468/*
2469 * snd_soc_codec_set_pll - configure codec PLL.
2470 * @codec: CODEC
2471 * @pll_id: DAI specific PLL ID
2472 * @source: DAI specific source for the PLL
2473 * @freq_in: PLL input clock frequency in Hz
2474 * @freq_out: requested PLL output clock frequency in Hz
2475 *
2476 * Configures and enables PLL to generate output clock based on input clock.
2477 */
2478int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2479 unsigned int freq_in, unsigned int freq_out)
2480{
2481 if (codec->driver->set_pll)
2482 return codec->driver->set_pll(codec, pll_id, source,
2483 freq_in, freq_out);
2484 else
2485 return -EINVAL;
2486}
2487EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2488
2489/**
2490 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2491 * @dai: DAI
2492 * @ratio: Ratio of BCLK to Sample rate.
2493 *
2494 * Configures the DAI for a preset BCLK to sample rate ratio.
2495 */
2496int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2497{
2498 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2499 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2500 else
2501 return -EINVAL;
2502}
2503EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2504
2505/**
2506 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2507 * @dai: DAI
2508 * @fmt: SND_SOC_DAIFMT_ format value.
2509 *
2510 * Configures the DAI hardware format and clocking.
2511 */
2512int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2513{
2514 if (dai->driver == NULL)
2515 return -EINVAL;
2516 if (dai->driver->ops->set_fmt == NULL)
2517 return -ENOTSUPP;
2518 return dai->driver->ops->set_fmt(dai, fmt);
2519}
2520EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2521
2522/**
2523 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2524 * @slots: Number of slots in use.
2525 * @tx_mask: bitmask representing active TX slots.
2526 * @rx_mask: bitmask representing active RX slots.
2527 *
2528 * Generates the TDM tx and rx slot default masks for DAI.
2529 */
2530static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2531 unsigned int *tx_mask,
2532 unsigned int *rx_mask)
2533{
2534 if (*tx_mask || *rx_mask)
2535 return 0;
2536
2537 if (!slots)
2538 return -EINVAL;
2539
2540 *tx_mask = (1 << slots) - 1;
2541 *rx_mask = (1 << slots) - 1;
2542
2543 return 0;
2544}
2545
2546/**
2547 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2548 * @dai: The DAI to configure
2549 * @tx_mask: bitmask representing active TX slots.
2550 * @rx_mask: bitmask representing active RX slots.
2551 * @slots: Number of slots in use.
2552 * @slot_width: Width in bits for each slot.
2553 *
2554 * This function configures the specified DAI for TDM operation. @slot contains
2555 * the total number of slots of the TDM stream and @slot_with the width of each
2556 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2557 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2558 * DAI should write to or read from. If a bit is set the corresponding slot is
2559 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2560 * the first slot, bit 1 to the second slot and so on. The first active slot
2561 * maps to the first channel of the DAI, the second active slot to the second
2562 * channel and so on.
2563 *
2564 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2565 * @rx_mask and @slot_width will be ignored.
2566 *
2567 * Returns 0 on success, a negative error code otherwise.
2568 */
2569int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2570 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2571{
2572 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2573 dai->driver->ops->xlate_tdm_slot_mask(slots,
2574 &tx_mask, &rx_mask);
2575 else
2576 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2577
2578 dai->tx_mask = tx_mask;
2579 dai->rx_mask = rx_mask;
2580
2581 if (dai->driver && dai->driver->ops->set_tdm_slot)
2582 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2583 slots, slot_width);
2584 else
2585 return -ENOTSUPP;
2586}
2587EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2588
2589/**
2590 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2591 * @dai: DAI
2592 * @tx_num: how many TX channels
2593 * @tx_slot: pointer to an array which imply the TX slot number channel
2594 * 0~num-1 uses
2595 * @rx_num: how many RX channels
2596 * @rx_slot: pointer to an array which imply the RX slot number channel
2597 * 0~num-1 uses
2598 *
2599 * configure the relationship between channel number and TDM slot number.
2600 */
2601int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2602 unsigned int tx_num, unsigned int *tx_slot,
2603 unsigned int rx_num, unsigned int *rx_slot)
2604{
2605 if (dai->driver && dai->driver->ops->set_channel_map)
2606 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2607 rx_num, rx_slot);
2608 else
2609 return -EINVAL;
2610}
2611EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2612
2613/**
2614 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2615 * @dai: DAI
2616 * @tristate: tristate enable
2617 *
2618 * Tristates the DAI so that others can use it.
2619 */
2620int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2621{
2622 if (dai->driver && dai->driver->ops->set_tristate)
2623 return dai->driver->ops->set_tristate(dai, tristate);
2624 else
2625 return -EINVAL;
2626}
2627EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2628
2629/**
2630 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2631 * @dai: DAI
2632 * @mute: mute enable
2633 * @direction: stream to mute
2634 *
2635 * Mutes the DAI DAC.
2636 */
2637int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2638 int direction)
2639{
2640 if (!dai->driver)
2641 return -ENOTSUPP;
2642
2643 if (dai->driver->ops->mute_stream)
2644 return dai->driver->ops->mute_stream(dai, mute, direction);
2645 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2646 dai->driver->ops->digital_mute)
2647 return dai->driver->ops->digital_mute(dai, mute);
2648 else
2649 return -ENOTSUPP;
2650}
2651EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2652
2653/**
2654 * snd_soc_register_card - Register a card with the ASoC core
2655 *
2656 * @card: Card to register
2657 *
2658 */
2659int snd_soc_register_card(struct snd_soc_card *card)
2660{
2661 int i, ret;
2662 struct snd_soc_pcm_runtime *rtd;
2663
2664 if (!card->name || !card->dev)
2665 return -EINVAL;
2666
2667 for (i = 0; i < card->num_links; i++) {
2668 struct snd_soc_dai_link *link = &card->dai_link[i];
2669
2670 ret = soc_init_dai_link(card, link);
2671 if (ret) {
2672 dev_err(card->dev, "ASoC: failed to init link %s\n",
2673 link->name);
2674 return ret;
2675 }
2676 }
2677
2678 dev_set_drvdata(card->dev, card);
2679
2680 snd_soc_initialize_card_lists(card);
2681
2682 INIT_LIST_HEAD(&card->dai_link_list);
2683 card->num_dai_links = 0;
2684
2685 INIT_LIST_HEAD(&card->rtd_list);
2686 card->num_rtd = 0;
2687
2688 INIT_LIST_HEAD(&card->dapm_dirty);
2689 INIT_LIST_HEAD(&card->dobj_list);
2690 card->instantiated = 0;
2691 mutex_init(&card->mutex);
2692 mutex_init(&card->dapm_mutex);
2693
2694 ret = snd_soc_instantiate_card(card);
2695 if (ret != 0)
2696 return ret;
2697
2698 /* deactivate pins to sleep state */
2699 list_for_each_entry(rtd, &card->rtd_list, list) {
2700 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2701 int j;
2702
2703 for (j = 0; j < rtd->num_codecs; j++) {
2704 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2705 if (!codec_dai->active)
2706 pinctrl_pm_select_sleep_state(codec_dai->dev);
2707 }
2708
2709 if (!cpu_dai->active)
2710 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2711 }
2712
2713 return ret;
2714}
2715EXPORT_SYMBOL_GPL(snd_soc_register_card);
2716
2717/**
2718 * snd_soc_unregister_card - Unregister a card with the ASoC core
2719 *
2720 * @card: Card to unregister
2721 *
2722 */
2723int snd_soc_unregister_card(struct snd_soc_card *card)
2724{
2725 if (card->instantiated) {
2726 card->instantiated = false;
2727 snd_soc_dapm_shutdown(card);
2728 soc_cleanup_card_resources(card);
2729 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2730 }
2731
2732 return 0;
2733}
2734EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2735
2736/*
2737 * Simplify DAI link configuration by removing ".-1" from device names
2738 * and sanitizing names.
2739 */
2740static char *fmt_single_name(struct device *dev, int *id)
2741{
2742 char *found, name[NAME_SIZE];
2743 int id1, id2;
2744
2745 if (dev_name(dev) == NULL)
2746 return NULL;
2747
2748 strlcpy(name, dev_name(dev), NAME_SIZE);
2749
2750 /* are we a "%s.%d" name (platform and SPI components) */
2751 found = strstr(name, dev->driver->name);
2752 if (found) {
2753 /* get ID */
2754 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2755
2756 /* discard ID from name if ID == -1 */
2757 if (*id == -1)
2758 found[strlen(dev->driver->name)] = '\0';
2759 }
2760
2761 } else {
2762 /* I2C component devices are named "bus-addr" */
2763 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2764 char tmp[NAME_SIZE];
2765
2766 /* create unique ID number from I2C addr and bus */
2767 *id = ((id1 & 0xffff) << 16) + id2;
2768
2769 /* sanitize component name for DAI link creation */
2770 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2771 strlcpy(name, tmp, NAME_SIZE);
2772 } else
2773 *id = 0;
2774 }
2775
2776 return kstrdup(name, GFP_KERNEL);
2777}
2778
2779/*
2780 * Simplify DAI link naming for single devices with multiple DAIs by removing
2781 * any ".-1" and using the DAI name (instead of device name).
2782 */
2783static inline char *fmt_multiple_name(struct device *dev,
2784 struct snd_soc_dai_driver *dai_drv)
2785{
2786 if (dai_drv->name == NULL) {
2787 dev_err(dev,
2788 "ASoC: error - multiple DAI %s registered with no name\n",
2789 dev_name(dev));
2790 return NULL;
2791 }
2792
2793 return kstrdup(dai_drv->name, GFP_KERNEL);
2794}
2795
2796/**
2797 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2798 *
2799 * @component: The component for which the DAIs should be unregistered
2800 */
2801static void snd_soc_unregister_dais(struct snd_soc_component *component)
2802{
2803 struct snd_soc_dai *dai, *_dai;
2804
2805 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2806 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2807 dai->name);
2808 list_del(&dai->list);
2809 kfree(dai->name);
2810 kfree(dai);
2811 }
2812}
2813
2814/* Create a DAI and add it to the component's DAI list */
2815static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2816 struct snd_soc_dai_driver *dai_drv,
2817 bool legacy_dai_naming)
2818{
2819 struct device *dev = component->dev;
2820 struct snd_soc_dai *dai;
2821
2822 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2823
2824 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2825 if (dai == NULL)
2826 return NULL;
2827
2828 /*
2829 * Back in the old days when we still had component-less DAIs,
2830 * instead of having a static name, component-less DAIs would
2831 * inherit the name of the parent device so it is possible to
2832 * register multiple instances of the DAI. We still need to keep
2833 * the same naming style even though those DAIs are not
2834 * component-less anymore.
2835 */
2836 if (legacy_dai_naming &&
2837 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2838 dai->name = fmt_single_name(dev, &dai->id);
2839 } else {
2840 dai->name = fmt_multiple_name(dev, dai_drv);
2841 if (dai_drv->id)
2842 dai->id = dai_drv->id;
2843 else
2844 dai->id = component->num_dai;
2845 }
2846 if (dai->name == NULL) {
2847 kfree(dai);
2848 return NULL;
2849 }
2850
2851 dai->component = component;
2852 dai->dev = dev;
2853 dai->driver = dai_drv;
2854 if (!dai->driver->ops)
2855 dai->driver->ops = &null_dai_ops;
2856
2857 list_add(&dai->list, &component->dai_list);
2858 component->num_dai++;
2859
2860 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2861 return dai;
2862}
2863
2864/**
2865 * snd_soc_register_dais - Register a DAI with the ASoC core
2866 *
2867 * @component: The component the DAIs are registered for
2868 * @dai_drv: DAI driver to use for the DAIs
2869 * @count: Number of DAIs
2870 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2871 * parent's name.
2872 */
2873static int snd_soc_register_dais(struct snd_soc_component *component,
2874 struct snd_soc_dai_driver *dai_drv, size_t count,
2875 bool legacy_dai_naming)
2876{
2877 struct device *dev = component->dev;
2878 struct snd_soc_dai *dai;
2879 unsigned int i;
2880 int ret;
2881
2882 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2883
2884 component->dai_drv = dai_drv;
2885
2886 for (i = 0; i < count; i++) {
2887
2888 dai = soc_add_dai(component, dai_drv + i,
2889 count == 1 && legacy_dai_naming);
2890 if (dai == NULL) {
2891 ret = -ENOMEM;
2892 goto err;
2893 }
2894 }
2895
2896 return 0;
2897
2898err:
2899 snd_soc_unregister_dais(component);
2900
2901 return ret;
2902}
2903
2904/**
2905 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2906 *
2907 * @component: The component the DAIs are registered for
2908 * @dai_drv: DAI driver to use for the DAI
2909 *
2910 * Topology can use this API to register DAIs when probing a component.
2911 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2912 * will be freed in the component cleanup.
2913 */
2914int snd_soc_register_dai(struct snd_soc_component *component,
2915 struct snd_soc_dai_driver *dai_drv)
2916{
2917 struct snd_soc_dapm_context *dapm =
2918 snd_soc_component_get_dapm(component);
2919 struct snd_soc_dai *dai;
2920 int ret;
2921
2922 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2923 dev_err(component->dev, "Invalid dai type %d\n",
2924 dai_drv->dobj.type);
2925 return -EINVAL;
2926 }
2927
2928 lockdep_assert_held(&client_mutex);
2929 dai = soc_add_dai(component, dai_drv, false);
2930 if (!dai)
2931 return -ENOMEM;
2932
2933 /* Create the DAI widgets here. After adding DAIs, topology may
2934 * also add routes that need these widgets as source or sink.
2935 */
2936 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2937 if (ret != 0) {
2938 dev_err(component->dev,
2939 "Failed to create DAI widgets %d\n", ret);
2940 }
2941
2942 return ret;
2943}
2944EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2945
2946static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2947 enum snd_soc_dapm_type type, int subseq)
2948{
2949 struct snd_soc_component *component = dapm->component;
2950
2951 component->driver->seq_notifier(component, type, subseq);
2952}
2953
2954static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2955 int event)
2956{
2957 struct snd_soc_component *component = dapm->component;
2958
2959 return component->driver->stream_event(component, event);
2960}
2961
2962static int snd_soc_component_initialize(struct snd_soc_component *component,
2963 const struct snd_soc_component_driver *driver, struct device *dev)
2964{
2965 struct snd_soc_dapm_context *dapm;
2966
2967 component->name = fmt_single_name(dev, &component->id);
2968 if (!component->name) {
2969 dev_err(dev, "ASoC: Failed to allocate name\n");
2970 return -ENOMEM;
2971 }
2972
2973 component->dev = dev;
2974 component->driver = driver;
2975 component->probe = component->driver->probe;
2976 component->remove = component->driver->remove;
2977 component->suspend = component->driver->suspend;
2978 component->resume = component->driver->resume;
2979
2980 dapm = &component->dapm;
2981 dapm->dev = dev;
2982 dapm->component = component;
2983 dapm->bias_level = SND_SOC_BIAS_OFF;
2984 dapm->idle_bias_off = true;
2985 if (driver->seq_notifier)
2986 dapm->seq_notifier = snd_soc_component_seq_notifier;
2987 if (driver->stream_event)
2988 dapm->stream_event = snd_soc_component_stream_event;
2989
2990 component->controls = driver->controls;
2991 component->num_controls = driver->num_controls;
2992 component->dapm_widgets = driver->dapm_widgets;
2993 component->num_dapm_widgets = driver->num_dapm_widgets;
2994 component->dapm_routes = driver->dapm_routes;
2995 component->num_dapm_routes = driver->num_dapm_routes;
2996
2997 INIT_LIST_HEAD(&component->dai_list);
2998 mutex_init(&component->io_mutex);
2999
3000 return 0;
3001}
3002
3003static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3004{
3005 int val_bytes = regmap_get_val_bytes(component->regmap);
3006
3007 /* Errors are legitimate for non-integer byte multiples */
3008 if (val_bytes > 0)
3009 component->val_bytes = val_bytes;
3010}
3011
3012#ifdef CONFIG_REGMAP
3013
3014/**
3015 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3016 * @component: The component for which to initialize the regmap instance
3017 * @regmap: The regmap instance that should be used by the component
3018 *
3019 * This function allows deferred assignment of the regmap instance that is
3020 * associated with the component. Only use this if the regmap instance is not
3021 * yet ready when the component is registered. The function must also be called
3022 * before the first IO attempt of the component.
3023 */
3024void snd_soc_component_init_regmap(struct snd_soc_component *component,
3025 struct regmap *regmap)
3026{
3027 component->regmap = regmap;
3028 snd_soc_component_setup_regmap(component);
3029}
3030EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3031
3032/**
3033 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3034 * @component: The component for which to de-initialize the regmap instance
3035 *
3036 * Calls regmap_exit() on the regmap instance associated to the component and
3037 * removes the regmap instance from the component.
3038 *
3039 * This function should only be used if snd_soc_component_init_regmap() was used
3040 * to initialize the regmap instance.
3041 */
3042void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3043{
3044 regmap_exit(component->regmap);
3045 component->regmap = NULL;
3046}
3047EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3048
3049#endif
3050
3051static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3052{
3053 if (!component->write && !component->read) {
3054 if (!component->regmap)
3055 component->regmap = dev_get_regmap(component->dev, NULL);
3056 if (component->regmap)
3057 snd_soc_component_setup_regmap(component);
3058 }
3059
3060 list_add(&component->list, &component_list);
3061 INIT_LIST_HEAD(&component->dobj_list);
3062}
3063
3064static void snd_soc_component_add(struct snd_soc_component *component)
3065{
3066 mutex_lock(&client_mutex);
3067 snd_soc_component_add_unlocked(component);
3068 mutex_unlock(&client_mutex);
3069}
3070
3071static void snd_soc_component_cleanup(struct snd_soc_component *component)
3072{
3073 snd_soc_unregister_dais(component);
3074 kfree(component->name);
3075}
3076
3077static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3078{
3079 list_del(&component->list);
3080}
3081
3082int snd_soc_register_component(struct device *dev,
3083 const struct snd_soc_component_driver *cmpnt_drv,
3084 struct snd_soc_dai_driver *dai_drv,
3085 int num_dai)
3086{
3087 struct snd_soc_component *cmpnt;
3088 int ret;
3089
3090 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
3091 if (!cmpnt) {
3092 dev_err(dev, "ASoC: Failed to allocate memory\n");
3093 return -ENOMEM;
3094 }
3095
3096 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
3097 if (ret)
3098 goto err_free;
3099
3100 cmpnt->ignore_pmdown_time = true;
3101 cmpnt->registered_as_component = true;
3102
3103 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
3104 if (ret < 0) {
3105 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3106 goto err_cleanup;
3107 }
3108
3109 snd_soc_component_add(cmpnt);
3110
3111 return 0;
3112
3113err_cleanup:
3114 snd_soc_component_cleanup(cmpnt);
3115err_free:
3116 kfree(cmpnt);
3117 return ret;
3118}
3119EXPORT_SYMBOL_GPL(snd_soc_register_component);
3120
3121/**
3122 * snd_soc_unregister_component - Unregister a component from the ASoC core
3123 *
3124 * @dev: The device to unregister
3125 */
3126void snd_soc_unregister_component(struct device *dev)
3127{
3128 struct snd_soc_component *cmpnt;
3129
3130 mutex_lock(&client_mutex);
3131 list_for_each_entry(cmpnt, &component_list, list) {
3132 if (dev == cmpnt->dev && cmpnt->registered_as_component)
3133 goto found;
3134 }
3135 mutex_unlock(&client_mutex);
3136 return;
3137
3138found:
3139 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
3140 snd_soc_component_del_unlocked(cmpnt);
3141 mutex_unlock(&client_mutex);
3142 snd_soc_component_cleanup(cmpnt);
3143 kfree(cmpnt);
3144}
3145EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3146
3147static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3148{
3149 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3150
3151 return platform->driver->probe(platform);
3152}
3153
3154static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3155{
3156 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3157
3158 platform->driver->remove(platform);
3159}
3160
3161/**
3162 * snd_soc_add_platform - Add a platform to the ASoC core
3163 * @dev: The parent device for the platform
3164 * @platform: The platform to add
3165 * @platform_drv: The driver for the platform
3166 */
3167int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3168 const struct snd_soc_platform_driver *platform_drv)
3169{
3170 int ret;
3171
3172 ret = snd_soc_component_initialize(&platform->component,
3173 &platform_drv->component_driver, dev);
3174 if (ret)
3175 return ret;
3176
3177 platform->dev = dev;
3178 platform->driver = platform_drv;
3179
3180 if (platform_drv->probe)
3181 platform->component.probe = snd_soc_platform_drv_probe;
3182 if (platform_drv->remove)
3183 platform->component.remove = snd_soc_platform_drv_remove;
3184
3185#ifdef CONFIG_DEBUG_FS
3186 platform->component.debugfs_prefix = "platform";
3187#endif
3188
3189 mutex_lock(&client_mutex);
3190 snd_soc_component_add_unlocked(&platform->component);
3191 list_add(&platform->list, &platform_list);
3192 mutex_unlock(&client_mutex);
3193
3194 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3195 platform->component.name);
3196
3197 return 0;
3198}
3199EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3200
3201/**
3202 * snd_soc_register_platform - Register a platform with the ASoC core
3203 *
3204 * @dev: The device for the platform
3205 * @platform_drv: The driver for the platform
3206 */
3207int snd_soc_register_platform(struct device *dev,
3208 const struct snd_soc_platform_driver *platform_drv)
3209{
3210 struct snd_soc_platform *platform;
3211 int ret;
3212
3213 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3214
3215 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3216 if (platform == NULL)
3217 return -ENOMEM;
3218
3219 ret = snd_soc_add_platform(dev, platform, platform_drv);
3220 if (ret)
3221 kfree(platform);
3222
3223 return ret;
3224}
3225EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3226
3227/**
3228 * snd_soc_remove_platform - Remove a platform from the ASoC core
3229 * @platform: the platform to remove
3230 */
3231void snd_soc_remove_platform(struct snd_soc_platform *platform)
3232{
3233
3234 mutex_lock(&client_mutex);
3235 list_del(&platform->list);
3236 snd_soc_component_del_unlocked(&platform->component);
3237 mutex_unlock(&client_mutex);
3238
3239 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3240 platform->component.name);
3241
3242 snd_soc_component_cleanup(&platform->component);
3243}
3244EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3245
3246struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3247{
3248 struct snd_soc_platform *platform;
3249
3250 mutex_lock(&client_mutex);
3251 list_for_each_entry(platform, &platform_list, list) {
3252 if (dev == platform->dev) {
3253 mutex_unlock(&client_mutex);
3254 return platform;
3255 }
3256 }
3257 mutex_unlock(&client_mutex);
3258
3259 return NULL;
3260}
3261EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3262
3263/**
3264 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3265 *
3266 * @dev: platform to unregister
3267 */
3268void snd_soc_unregister_platform(struct device *dev)
3269{
3270 struct snd_soc_platform *platform;
3271
3272 platform = snd_soc_lookup_platform(dev);
3273 if (!platform)
3274 return;
3275
3276 snd_soc_remove_platform(platform);
3277 kfree(platform);
3278}
3279EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3280
3281static u64 codec_format_map[] = {
3282 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3283 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3284 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3285 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3286 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3287 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3288 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3289 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3290 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3291 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3292 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3293 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3294 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3295 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3296 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3297 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3298};
3299
3300/* Fix up the DAI formats for endianness: codecs don't actually see
3301 * the endianness of the data but we're using the CPU format
3302 * definitions which do need to include endianness so we ensure that
3303 * codec DAIs always have both big and little endian variants set.
3304 */
3305static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3306{
3307 int i;
3308
3309 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3310 if (stream->formats & codec_format_map[i])
3311 stream->formats |= codec_format_map[i];
3312}
3313
3314static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3315{
3316 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3317
3318 return codec->driver->probe(codec);
3319}
3320
3321static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3322{
3323 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3324
3325 codec->driver->remove(codec);
3326}
3327
3328static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3329{
3330 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3331
3332 return codec->driver->suspend(codec);
3333}
3334
3335static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3336{
3337 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3338
3339 return codec->driver->resume(codec);
3340}
3341
3342static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3343 unsigned int reg, unsigned int val)
3344{
3345 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3346
3347 return codec->driver->write(codec, reg, val);
3348}
3349
3350static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3351 unsigned int reg, unsigned int *val)
3352{
3353 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3354
3355 *val = codec->driver->read(codec, reg);
3356
3357 return 0;
3358}
3359
3360static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3361 enum snd_soc_bias_level level)
3362{
3363 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3364
3365 return codec->driver->set_bias_level(codec, level);
3366}
3367
3368/**
3369 * snd_soc_register_codec - Register a codec with the ASoC core
3370 *
3371 * @dev: The parent device for this codec
3372 * @codec_drv: Codec driver
3373 * @dai_drv: The associated DAI driver
3374 * @num_dai: Number of DAIs
3375 */
3376int snd_soc_register_codec(struct device *dev,
3377 const struct snd_soc_codec_driver *codec_drv,
3378 struct snd_soc_dai_driver *dai_drv,
3379 int num_dai)
3380{
3381 struct snd_soc_dapm_context *dapm;
3382 struct snd_soc_codec *codec;
3383 struct snd_soc_dai *dai;
3384 int ret, i;
3385
3386 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3387
3388 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3389 if (codec == NULL)
3390 return -ENOMEM;
3391
3392 codec->component.codec = codec;
3393
3394 ret = snd_soc_component_initialize(&codec->component,
3395 &codec_drv->component_driver, dev);
3396 if (ret)
3397 goto err_free;
3398
3399 if (codec_drv->probe)
3400 codec->component.probe = snd_soc_codec_drv_probe;
3401 if (codec_drv->remove)
3402 codec->component.remove = snd_soc_codec_drv_remove;
3403 if (codec_drv->suspend)
3404 codec->component.suspend = snd_soc_codec_drv_suspend;
3405 if (codec_drv->resume)
3406 codec->component.resume = snd_soc_codec_drv_resume;
3407 if (codec_drv->write)
3408 codec->component.write = snd_soc_codec_drv_write;
3409 if (codec_drv->read)
3410 codec->component.read = snd_soc_codec_drv_read;
3411 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3412
3413 dapm = snd_soc_codec_get_dapm(codec);
3414 dapm->idle_bias_off = codec_drv->idle_bias_off;
3415 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3416 if (codec_drv->seq_notifier)
3417 dapm->seq_notifier = codec_drv->seq_notifier;
3418 if (codec_drv->set_bias_level)
3419 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3420 codec->dev = dev;
3421 codec->driver = codec_drv;
3422 codec->component.val_bytes = codec_drv->reg_word_size;
3423
3424#ifdef CONFIG_DEBUG_FS
3425 codec->component.init_debugfs = soc_init_codec_debugfs;
3426 codec->component.debugfs_prefix = "codec";
3427#endif
3428
3429 if (codec_drv->get_regmap)
3430 codec->component.regmap = codec_drv->get_regmap(dev);
3431
3432 for (i = 0; i < num_dai; i++) {
3433 fixup_codec_formats(&dai_drv[i].playback);
3434 fixup_codec_formats(&dai_drv[i].capture);
3435 }
3436
3437 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3438 if (ret < 0) {
3439 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3440 goto err_cleanup;
3441 }
3442
3443 list_for_each_entry(dai, &codec->component.dai_list, list)
3444 dai->codec = codec;
3445
3446 mutex_lock(&client_mutex);
3447 snd_soc_component_add_unlocked(&codec->component);
3448 list_add(&codec->list, &codec_list);
3449 mutex_unlock(&client_mutex);
3450
3451 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3452 codec->component.name);
3453 return 0;
3454
3455err_cleanup:
3456 snd_soc_component_cleanup(&codec->component);
3457err_free:
3458 kfree(codec);
3459 return ret;
3460}
3461EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3462
3463/**
3464 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3465 *
3466 * @dev: codec to unregister
3467 */
3468void snd_soc_unregister_codec(struct device *dev)
3469{
3470 struct snd_soc_codec *codec;
3471
3472 mutex_lock(&client_mutex);
3473 list_for_each_entry(codec, &codec_list, list) {
3474 if (dev == codec->dev)
3475 goto found;
3476 }
3477 mutex_unlock(&client_mutex);
3478 return;
3479
3480found:
3481 list_del(&codec->list);
3482 snd_soc_component_del_unlocked(&codec->component);
3483 mutex_unlock(&client_mutex);
3484
3485 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3486 codec->component.name);
3487
3488 snd_soc_component_cleanup(&codec->component);
3489 snd_soc_cache_exit(codec);
3490 kfree(codec);
3491}
3492EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3493
3494/* Retrieve a card's name from device tree */
3495int snd_soc_of_parse_card_name_from_node(struct snd_soc_card *card,
3496 struct device_node *np,
3497 const char *propname)
3498{
3499 int ret;
3500
3501 if (!card->dev) {
3502 pr_err("card->dev is not set before calling %s\n", __func__);
3503 return -EINVAL;
3504 }
3505
3506 if (!np)
3507 np = card->dev->of_node;
3508
3509 ret = of_property_read_string_index(np, propname, 0, &card->name);
3510 /*
3511 * EINVAL means the property does not exist. This is fine providing
3512 * card->name was previously set, which is checked later in
3513 * snd_soc_register_card.
3514 */
3515 if (ret < 0 && ret != -EINVAL) {
3516 dev_err(card->dev,
3517 "ASoC: Property '%s' could not be read: %d\n",
3518 propname, ret);
3519 return ret;
3520 }
3521
3522 return 0;
3523}
3524EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name_from_node);
3525
3526static const struct snd_soc_dapm_widget simple_widgets[] = {
3527 SND_SOC_DAPM_MIC("Microphone", NULL),
3528 SND_SOC_DAPM_LINE("Line", NULL),
3529 SND_SOC_DAPM_HP("Headphone", NULL),
3530 SND_SOC_DAPM_SPK("Speaker", NULL),
3531};
3532
3533int snd_soc_of_parse_audio_simple_widgets_from_node(struct snd_soc_card *card,
3534 struct device_node *np,
3535 const char *propname)
3536{
3537 struct snd_soc_dapm_widget *widgets;
3538 const char *template, *wname;
3539 int i, j, num_widgets, ret;
3540
3541 if (!np)
3542 np = card->dev->of_node;
3543
3544 num_widgets = of_property_count_strings(np, propname);
3545 if (num_widgets < 0) {
3546 dev_err(card->dev,
3547 "ASoC: Property '%s' does not exist\n", propname);
3548 return -EINVAL;
3549 }
3550 if (num_widgets & 1) {
3551 dev_err(card->dev,
3552 "ASoC: Property '%s' length is not even\n", propname);
3553 return -EINVAL;
3554 }
3555
3556 num_widgets /= 2;
3557 if (!num_widgets) {
3558 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3559 propname);
3560 return -EINVAL;
3561 }
3562
3563 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3564 GFP_KERNEL);
3565 if (!widgets) {
3566 dev_err(card->dev,
3567 "ASoC: Could not allocate memory for widgets\n");
3568 return -ENOMEM;
3569 }
3570
3571 for (i = 0; i < num_widgets; i++) {
3572 ret = of_property_read_string_index(np, propname,
3573 2 * i, &template);
3574 if (ret) {
3575 dev_err(card->dev,
3576 "ASoC: Property '%s' index %d read error:%d\n",
3577 propname, 2 * i, ret);
3578 return -EINVAL;
3579 }
3580
3581 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3582 if (!strncmp(template, simple_widgets[j].name,
3583 strlen(simple_widgets[j].name))) {
3584 widgets[i] = simple_widgets[j];
3585 break;
3586 }
3587 }
3588
3589 if (j >= ARRAY_SIZE(simple_widgets)) {
3590 dev_err(card->dev,
3591 "ASoC: DAPM widget '%s' is not supported\n",
3592 template);
3593 return -EINVAL;
3594 }
3595
3596 ret = of_property_read_string_index(np, propname,
3597 (2 * i) + 1,
3598 &wname);
3599 if (ret) {
3600 dev_err(card->dev,
3601 "ASoC: Property '%s' index %d read error:%d\n",
3602 propname, (2 * i) + 1, ret);
3603 return -EINVAL;
3604 }
3605
3606 widgets[i].name = wname;
3607 }
3608
3609 card->of_dapm_widgets = widgets;
3610 card->num_of_dapm_widgets = num_widgets;
3611
3612 return 0;
3613}
3614EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets_from_node);
3615
3616static int snd_soc_of_get_slot_mask(struct device_node *np,
3617 const char *prop_name,
3618 unsigned int *mask)
3619{
3620 u32 val;
3621 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3622 int i;
3623
3624 if (!of_slot_mask)
3625 return 0;
3626 val /= sizeof(u32);
3627 for (i = 0; i < val; i++)
3628 if (be32_to_cpup(&of_slot_mask[i]))
3629 *mask |= (1 << i);
3630
3631 return val;
3632}
3633
3634int snd_soc_of_parse_tdm_slot(struct device_node *np,
3635 unsigned int *tx_mask,
3636 unsigned int *rx_mask,
3637 unsigned int *slots,
3638 unsigned int *slot_width)
3639{
3640 u32 val;
3641 int ret;
3642
3643 if (tx_mask)
3644 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3645 if (rx_mask)
3646 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3647
3648 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3649 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3650 if (ret)
3651 return ret;
3652
3653 if (slots)
3654 *slots = val;
3655 }
3656
3657 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3658 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3659 if (ret)
3660 return ret;
3661
3662 if (slot_width)
3663 *slot_width = val;
3664 }
3665
3666 return 0;
3667}
3668EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3669
3670void snd_soc_of_parse_audio_prefix_from_node(struct snd_soc_card *card,
3671 struct device_node *np,
3672 struct snd_soc_codec_conf *codec_conf,
3673 struct device_node *of_node,
3674 const char *propname)
3675{
3676 const char *str;
3677 int ret;
3678
3679 if (!np)
3680 np = card->dev->of_node;
3681
3682 ret = of_property_read_string(np, propname, &str);
3683 if (ret < 0) {
3684 /* no prefix is not error */
3685 return;
3686 }
3687
3688 codec_conf->of_node = of_node;
3689 codec_conf->name_prefix = str;
3690}
3691EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix_from_node);
3692
3693int snd_soc_of_parse_audio_routing_from_node(struct snd_soc_card *card,
3694 struct device_node *np,
3695 const char *propname)
3696{
3697 int num_routes;
3698 struct snd_soc_dapm_route *routes;
3699 int i, ret;
3700
3701 if (!np)
3702 np = card->dev->of_node;
3703
3704 num_routes = of_property_count_strings(np, propname);
3705 if (num_routes < 0 || num_routes & 1) {
3706 dev_err(card->dev,
3707 "ASoC: Property '%s' does not exist or its length is not even\n",
3708 propname);
3709 return -EINVAL;
3710 }
3711 num_routes /= 2;
3712 if (!num_routes) {
3713 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3714 propname);
3715 return -EINVAL;
3716 }
3717
3718 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3719 GFP_KERNEL);
3720 if (!routes) {
3721 dev_err(card->dev,
3722 "ASoC: Could not allocate DAPM route table\n");
3723 return -EINVAL;
3724 }
3725
3726 for (i = 0; i < num_routes; i++) {
3727 ret = of_property_read_string_index(np, propname,
3728 2 * i, &routes[i].sink);
3729 if (ret) {
3730 dev_err(card->dev,
3731 "ASoC: Property '%s' index %d could not be read: %d\n",
3732 propname, 2 * i, ret);
3733 return -EINVAL;
3734 }
3735 ret = of_property_read_string_index(np, propname,
3736 (2 * i) + 1, &routes[i].source);
3737 if (ret) {
3738 dev_err(card->dev,
3739 "ASoC: Property '%s' index %d could not be read: %d\n",
3740 propname, (2 * i) + 1, ret);
3741 return -EINVAL;
3742 }
3743 }
3744
3745 card->num_of_dapm_routes = num_routes;
3746 card->of_dapm_routes = routes;
3747
3748 return 0;
3749}
3750EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing_from_node);
3751
3752unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3753 const char *prefix,
3754 struct device_node **bitclkmaster,
3755 struct device_node **framemaster)
3756{
3757 int ret, i;
3758 char prop[128];
3759 unsigned int format = 0;
3760 int bit, frame;
3761 const char *str;
3762 struct {
3763 char *name;
3764 unsigned int val;
3765 } of_fmt_table[] = {
3766 { "i2s", SND_SOC_DAIFMT_I2S },
3767 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3768 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3769 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3770 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3771 { "ac97", SND_SOC_DAIFMT_AC97 },
3772 { "pdm", SND_SOC_DAIFMT_PDM},
3773 { "msb", SND_SOC_DAIFMT_MSB },
3774 { "lsb", SND_SOC_DAIFMT_LSB },
3775 };
3776
3777 if (!prefix)
3778 prefix = "";
3779
3780 /*
3781 * check "[prefix]format = xxx"
3782 * SND_SOC_DAIFMT_FORMAT_MASK area
3783 */
3784 snprintf(prop, sizeof(prop), "%sformat", prefix);
3785 ret = of_property_read_string(np, prop, &str);
3786 if (ret == 0) {
3787 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3788 if (strcmp(str, of_fmt_table[i].name) == 0) {
3789 format |= of_fmt_table[i].val;
3790 break;
3791 }
3792 }
3793 }
3794
3795 /*
3796 * check "[prefix]continuous-clock"
3797 * SND_SOC_DAIFMT_CLOCK_MASK area
3798 */
3799 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3800 if (of_property_read_bool(np, prop))
3801 format |= SND_SOC_DAIFMT_CONT;
3802 else
3803 format |= SND_SOC_DAIFMT_GATED;
3804
3805 /*
3806 * check "[prefix]bitclock-inversion"
3807 * check "[prefix]frame-inversion"
3808 * SND_SOC_DAIFMT_INV_MASK area
3809 */
3810 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3811 bit = !!of_get_property(np, prop, NULL);
3812
3813 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3814 frame = !!of_get_property(np, prop, NULL);
3815
3816 switch ((bit << 4) + frame) {
3817 case 0x11:
3818 format |= SND_SOC_DAIFMT_IB_IF;
3819 break;
3820 case 0x10:
3821 format |= SND_SOC_DAIFMT_IB_NF;
3822 break;
3823 case 0x01:
3824 format |= SND_SOC_DAIFMT_NB_IF;
3825 break;
3826 default:
3827 /* SND_SOC_DAIFMT_NB_NF is default */
3828 break;
3829 }
3830
3831 /*
3832 * check "[prefix]bitclock-master"
3833 * check "[prefix]frame-master"
3834 * SND_SOC_DAIFMT_MASTER_MASK area
3835 */
3836 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3837 bit = !!of_get_property(np, prop, NULL);
3838 if (bit && bitclkmaster)
3839 *bitclkmaster = of_parse_phandle(np, prop, 0);
3840
3841 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3842 frame = !!of_get_property(np, prop, NULL);
3843 if (frame && framemaster)
3844 *framemaster = of_parse_phandle(np, prop, 0);
3845
3846 switch ((bit << 4) + frame) {
3847 case 0x11:
3848 format |= SND_SOC_DAIFMT_CBM_CFM;
3849 break;
3850 case 0x10:
3851 format |= SND_SOC_DAIFMT_CBM_CFS;
3852 break;
3853 case 0x01:
3854 format |= SND_SOC_DAIFMT_CBS_CFM;
3855 break;
3856 default:
3857 format |= SND_SOC_DAIFMT_CBS_CFS;
3858 break;
3859 }
3860
3861 return format;
3862}
3863EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3864
3865int snd_soc_get_dai_name(struct of_phandle_args *args,
3866 const char **dai_name)
3867{
3868 struct snd_soc_component *pos;
3869 struct device_node *component_of_node;
3870 int ret = -EPROBE_DEFER;
3871
3872 mutex_lock(&client_mutex);
3873 list_for_each_entry(pos, &component_list, list) {
3874 component_of_node = pos->dev->of_node;
3875 if (!component_of_node && pos->dev->parent)
3876 component_of_node = pos->dev->parent->of_node;
3877
3878 if (component_of_node != args->np)
3879 continue;
3880
3881 if (pos->driver->of_xlate_dai_name) {
3882 ret = pos->driver->of_xlate_dai_name(pos,
3883 args,
3884 dai_name);
3885 } else {
3886 int id = -1;
3887
3888 switch (args->args_count) {
3889 case 0:
3890 id = 0; /* same as dai_drv[0] */
3891 break;
3892 case 1:
3893 id = args->args[0];
3894 break;
3895 default:
3896 /* not supported */
3897 break;
3898 }
3899
3900 if (id < 0 || id >= pos->num_dai) {
3901 ret = -EINVAL;
3902 continue;
3903 }
3904
3905 ret = 0;
3906
3907 *dai_name = pos->dai_drv[id].name;
3908 if (!*dai_name)
3909 *dai_name = pos->name;
3910 }
3911
3912 break;
3913 }
3914 mutex_unlock(&client_mutex);
3915 return ret;
3916}
3917EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3918
3919int snd_soc_of_get_dai_name(struct device_node *of_node,
3920 const char **dai_name)
3921{
3922 struct of_phandle_args args;
3923 int ret;
3924
3925 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3926 "#sound-dai-cells", 0, &args);
3927 if (ret)
3928 return ret;
3929
3930 ret = snd_soc_get_dai_name(&args, dai_name);
3931
3932 of_node_put(args.np);
3933
3934 return ret;
3935}
3936EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3937
3938/*
3939 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3940 * @dev: Card device
3941 * @of_node: Device node
3942 * @dai_link: DAI link
3943 *
3944 * Builds an array of CODEC DAI components from the DAI link property
3945 * 'sound-dai'.
3946 * The array is set in the DAI link and the number of DAIs is set accordingly.
3947 * The device nodes in the array (of_node) must be dereferenced by the caller.
3948 *
3949 * Returns 0 for success
3950 */
3951int snd_soc_of_get_dai_link_codecs(struct device *dev,
3952 struct device_node *of_node,
3953 struct snd_soc_dai_link *dai_link)
3954{
3955 struct of_phandle_args args;
3956 struct snd_soc_dai_link_component *component;
3957 char *name;
3958 int index, num_codecs, ret;
3959
3960 /* Count the number of CODECs */
3961 name = "sound-dai";
3962 num_codecs = of_count_phandle_with_args(of_node, name,
3963 "#sound-dai-cells");
3964 if (num_codecs <= 0) {
3965 if (num_codecs == -ENOENT)
3966 dev_err(dev, "No 'sound-dai' property\n");
3967 else
3968 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3969 return num_codecs;
3970 }
3971 component = devm_kzalloc(dev,
3972 sizeof *component * num_codecs,
3973 GFP_KERNEL);
3974 if (!component)
3975 return -ENOMEM;
3976 dai_link->codecs = component;
3977 dai_link->num_codecs = num_codecs;
3978
3979 /* Parse the list */
3980 for (index = 0, component = dai_link->codecs;
3981 index < dai_link->num_codecs;
3982 index++, component++) {
3983 ret = of_parse_phandle_with_args(of_node, name,
3984 "#sound-dai-cells",
3985 index, &args);
3986 if (ret)
3987 goto err;
3988 component->of_node = args.np;
3989 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3990 if (ret < 0)
3991 goto err;
3992 }
3993 return 0;
3994err:
3995 for (index = 0, component = dai_link->codecs;
3996 index < dai_link->num_codecs;
3997 index++, component++) {
3998 if (!component->of_node)
3999 break;
4000 of_node_put(component->of_node);
4001 component->of_node = NULL;
4002 }
4003 dai_link->codecs = NULL;
4004 dai_link->num_codecs = 0;
4005 return ret;
4006}
4007EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4008
4009static int __init snd_soc_init(void)
4010{
4011 snd_soc_debugfs_init();
4012 snd_soc_util_init();
4013
4014 return platform_driver_register(&soc_driver);
4015}
4016module_init(snd_soc_init);
4017
4018static void __exit snd_soc_exit(void)
4019{
4020 snd_soc_util_exit();
4021 snd_soc_debugfs_exit();
4022
4023#ifdef CONFIG_DEBUG_FS
4024#endif
4025 platform_driver_unregister(&soc_driver);
4026}
4027module_exit(snd_soc_exit);
4028
4029/* Module information */
4030MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4031MODULE_DESCRIPTION("ALSA SoC Core");
4032MODULE_LICENSE("GPL");
4033MODULE_ALIAS("platform:soc-audio");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-core.c -- ALSA SoC Audio Layer
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Author: Liam Girdwood <lrg@slimlogic.co.uk>
11// with code, comments and ideas from :-
12// Richard Purdie <richard@openedhand.com>
13//
14// TODO:
15// o Add hw rules to enforce rates, etc.
16// o More testing with other codecs/machines.
17// o Add more codecs and platforms to ensure good API coverage.
18// o Support TDM on PCM and I2S
19
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/pm.h>
25#include <linux/bitops.h>
26#include <linux/debugfs.h>
27#include <linux/platform_device.h>
28#include <linux/pinctrl/consumer.h>
29#include <linux/ctype.h>
30#include <linux/slab.h>
31#include <linux/of.h>
32#include <linux/of_graph.h>
33#include <linux/dmi.h>
34#include <linux/acpi.h>
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/soc-dpcm.h>
40#include <sound/soc-topology.h>
41#include <sound/soc-link.h>
42#include <sound/initval.h>
43
44#define CREATE_TRACE_POINTS
45#include <trace/events/asoc.h>
46
47static DEFINE_MUTEX(client_mutex);
48static LIST_HEAD(component_list);
49static LIST_HEAD(unbind_card_list);
50
51#define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
53
54/*
55 * This is used if driver don't need to have CPU/Codec/Platform
56 * dai_link. see soc.h
57 */
58struct snd_soc_dai_link_component null_dailink_component[0];
59EXPORT_SYMBOL_GPL(null_dailink_component);
60
61/*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66static int pmdown_time = 5000;
67module_param(pmdown_time, int, 0);
68MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
72{
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
74
75 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
76}
77
78static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
81{
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
83 int ret;
84
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
86 if (ret)
87 return ret;
88
89 return count;
90}
91
92static DEVICE_ATTR_RW(pmdown_time);
93
94static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
96 NULL
97};
98
99static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
101{
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
104
105 if (!rtd)
106 return 0;
107
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
111}
112
113static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
116};
117
118static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
121};
122
123static const struct attribute_group *soc_dev_attr_groups[] = {
124 &soc_dapm_dev_group,
125 &soc_dev_group,
126 NULL
127};
128
129#ifdef CONFIG_DEBUG_FS
130struct dentry *snd_soc_debugfs_root;
131EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
132
133static void soc_init_component_debugfs(struct snd_soc_component *component)
134{
135 if (!component->card->debugfs_card_root)
136 return;
137
138 if (component->debugfs_prefix) {
139 char *name;
140
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
143 if (name) {
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
146 kfree(name);
147 }
148 } else {
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
151 }
152
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
155}
156
157static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
158{
159 if (!component->debugfs_root)
160 return;
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
163}
164
165static int dai_list_show(struct seq_file *m, void *v)
166{
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
169
170 mutex_lock(&client_mutex);
171
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
175
176 mutex_unlock(&client_mutex);
177
178 return 0;
179}
180DEFINE_SHOW_ATTRIBUTE(dai_list);
181
182static int component_list_show(struct seq_file *m, void *v)
183{
184 struct snd_soc_component *component;
185
186 mutex_lock(&client_mutex);
187
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
190
191 mutex_unlock(&client_mutex);
192
193 return 0;
194}
195DEFINE_SHOW_ATTRIBUTE(component_list);
196
197static void soc_init_card_debugfs(struct snd_soc_card *card)
198{
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
201
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
203 &card->pop_time);
204
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
206}
207
208static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
209{
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
212}
213
214static void snd_soc_debugfs_init(void)
215{
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
217
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
219 &dai_list_fops);
220
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
223}
224
225static void snd_soc_debugfs_exit(void)
226{
227 debugfs_remove_recursive(snd_soc_debugfs_root);
228}
229
230#else
231
232static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236static inline void snd_soc_debugfs_init(void) { }
237static inline void snd_soc_debugfs_exit(void) { }
238
239#endif
240
241static int snd_soc_is_match_dai_args(struct of_phandle_args *args1,
242 struct of_phandle_args *args2)
243{
244 if (!args1 || !args2)
245 return 0;
246
247 if (args1->np != args2->np)
248 return 0;
249
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
252 return 0;
253
254 return 1;
255}
256
257static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
258{
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
260}
261
262static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
263{
264 return (dlc->name && dlc->of_node);
265}
266
267static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
268{
269 return !(dlc->dai_args || dlc->dai_name);
270}
271
272static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
274{
275 if (!dlc)
276 return 0;
277
278 if (dlc->dai_args)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
280
281 if (!dlc->dai_name)
282 return 1;
283
284 /* see snd_soc_dai_name_get() */
285
286 if (strcmp(dlc->dai_name, dai->name) == 0)
287 return 1;
288
289 if (dai->driver->name &&
290 strcmp(dai->driver->name, dlc->dai_name) == 0)
291 return 1;
292
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
295 return 1;
296
297 return 0;
298}
299
300const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
301{
302 /* see snd_soc_is_matching_dai() */
303 if (dai->name)
304 return dai->name;
305
306 if (dai->driver->name)
307 return dai->driver->name;
308
309 if (dai->component->name)
310 return dai->component->name;
311
312 return NULL;
313}
314EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
315
316static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
318{
319 struct snd_soc_component *comp;
320 int i;
321
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
325 return 0;
326 }
327
328 /* see for_each_rtd_components */
329 rtd->components[rtd->num_components] = component;
330 rtd->num_components++;
331
332 return 0;
333}
334
335struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
337{
338 struct snd_soc_component *component;
339 int i;
340
341 if (!driver_name)
342 return NULL;
343
344 /*
345 * NOTE
346 *
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
351 */
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
354
355 if (!component_name)
356 continue;
357
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
360 return component;
361 }
362
363 return NULL;
364}
365EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
366
367struct snd_soc_component
368*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
369{
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
372
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
376 (!driver_name ||
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
380 break;
381 }
382 }
383
384 return found_component;
385}
386EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
387
388struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
390{
391 struct snd_soc_component *component;
392
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
396
397 return component;
398}
399EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
400
401struct snd_soc_pcm_runtime
402*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
404{
405 struct snd_soc_pcm_runtime *rtd;
406
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
409 return rtd;
410 }
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
412 return NULL;
413}
414EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
415
416/*
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
420 */
421void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
422{
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
425
426 snd_soc_dpcm_mutex_lock(rtd);
427
428 dev_dbg(rtd->dev,
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
434
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
437 rtd->pop_wait = 0;
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
440 }
441
442 snd_soc_dpcm_mutex_unlock(rtd);
443}
444EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
445
446static void soc_release_rtd_dev(struct device *dev)
447{
448 /* "dev" means "rtd->dev" */
449 kfree(dev);
450}
451
452static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
453{
454 if (!rtd)
455 return;
456
457 list_del(&rtd->list);
458
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
462
463 /*
464 * we don't need to call kfree() for rtd->dev
465 * see
466 * soc_release_rtd_dev()
467 *
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
470 * see
471 * soc_new_pcm_runtime()
472 *
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
475 * see
476 * soc_new_pcm_runtime()
477 *
478 * rtd = devm_kzalloc(dev, ...);
479 * rtd->dev = dev
480 */
481 device_unregister(rtd->dev);
482}
483
484static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
487 delayed_work.work);
488
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
491}
492
493static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
495{
496 struct snd_soc_pcm_runtime *rtd;
497 struct snd_soc_component *component;
498 struct device *dev;
499 int ret;
500 int stream;
501
502 /*
503 * for rtd->dev
504 */
505 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
506 if (!dev)
507 return NULL;
508
509 dev->parent = card->dev;
510 dev->release = soc_release_rtd_dev;
511
512 dev_set_name(dev, "%s", dai_link->name);
513
514 ret = device_register(dev);
515 if (ret < 0) {
516 put_device(dev); /* soc_release_rtd_dev */
517 return NULL;
518 }
519
520 /*
521 * for rtd
522 */
523 rtd = devm_kzalloc(dev,
524 sizeof(*rtd) +
525 sizeof(component) * (dai_link->num_cpus +
526 dai_link->num_codecs +
527 dai_link->num_platforms),
528 GFP_KERNEL);
529 if (!rtd) {
530 device_unregister(dev);
531 return NULL;
532 }
533
534 rtd->dev = dev;
535 INIT_LIST_HEAD(&rtd->list);
536 for_each_pcm_streams(stream) {
537 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
538 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
539 }
540 dev_set_drvdata(dev, rtd);
541 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
542
543 /*
544 * for rtd->dais
545 */
546 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
547 sizeof(struct snd_soc_dai *),
548 GFP_KERNEL);
549 if (!rtd->dais)
550 goto free_rtd;
551
552 /*
553 * dais = [][][][][][][][][][][][][][][][][][]
554 * ^cpu_dais ^codec_dais
555 * |--- num_cpus ---|--- num_codecs --|
556 * see
557 * snd_soc_rtd_to_cpu()
558 * snd_soc_rtd_to_codec()
559 */
560 rtd->card = card;
561 rtd->dai_link = dai_link;
562 rtd->num = card->num_rtd++;
563 rtd->pmdown_time = pmdown_time; /* default power off timeout */
564
565 /* see for_each_card_rtds */
566 list_add_tail(&rtd->list, &card->rtd_list);
567
568 ret = device_add_groups(dev, soc_dev_attr_groups);
569 if (ret < 0)
570 goto free_rtd;
571
572 return rtd;
573
574free_rtd:
575 soc_free_pcm_runtime(rtd);
576 return NULL;
577}
578
579static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
580{
581 struct snd_soc_dai_link *dai_link;
582 int i;
583
584 /*
585 * COMP_DUMMY() creates size 0 array on dai_link.
586 * Fill it as dummy DAI in case of CPU/Codec here.
587 * Do nothing for Platform.
588 */
589 for_each_card_prelinks(card, i, dai_link) {
590 if (dai_link->num_cpus == 0 && dai_link->cpus) {
591 dai_link->num_cpus = 1;
592 dai_link->cpus = &snd_soc_dummy_dlc;
593 }
594 if (dai_link->num_codecs == 0 && dai_link->codecs) {
595 dai_link->num_codecs = 1;
596 dai_link->codecs = &snd_soc_dummy_dlc;
597 }
598 }
599}
600
601static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
602{
603 struct snd_soc_pcm_runtime *rtd;
604
605 for_each_card_rtds(card, rtd)
606 flush_delayed_work(&rtd->delayed_work);
607}
608
609#ifdef CONFIG_PM_SLEEP
610static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
611{
612 struct snd_soc_pcm_runtime *rtd;
613 struct snd_soc_dai *dai;
614 int playback = SNDRV_PCM_STREAM_PLAYBACK;
615 int i;
616
617 for_each_card_rtds(card, rtd) {
618
619 if (rtd->dai_link->ignore_suspend)
620 continue;
621
622 for_each_rtd_dais(rtd, i, dai) {
623 if (snd_soc_dai_stream_active(dai, playback))
624 snd_soc_dai_digital_mute(dai, mute, playback);
625 }
626 }
627}
628
629static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
630{
631 struct snd_soc_pcm_runtime *rtd;
632 int stream;
633
634 for_each_card_rtds(card, rtd) {
635
636 if (rtd->dai_link->ignore_suspend)
637 continue;
638
639 for_each_pcm_streams(stream)
640 snd_soc_dapm_stream_event(rtd, stream, event);
641 }
642}
643
644/* powers down audio subsystem for suspend */
645int snd_soc_suspend(struct device *dev)
646{
647 struct snd_soc_card *card = dev_get_drvdata(dev);
648 struct snd_soc_component *component;
649 struct snd_soc_pcm_runtime *rtd;
650 int i;
651
652 /* If the card is not initialized yet there is nothing to do */
653 if (!snd_soc_card_is_instantiated(card))
654 return 0;
655
656 /*
657 * Due to the resume being scheduled into a workqueue we could
658 * suspend before that's finished - wait for it to complete.
659 */
660 snd_power_wait(card->snd_card);
661
662 /* we're going to block userspace touching us until resume completes */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
664
665 /* mute any active DACs */
666 soc_playback_digital_mute(card, 1);
667
668 /* suspend all pcms */
669 for_each_card_rtds(card, rtd) {
670 if (rtd->dai_link->ignore_suspend)
671 continue;
672
673 snd_pcm_suspend_all(rtd->pcm);
674 }
675
676 snd_soc_card_suspend_pre(card);
677
678 /* close any waiting streams */
679 snd_soc_flush_all_delayed_work(card);
680
681 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
682
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card);
685 snd_soc_dapm_sync(&card->dapm);
686
687 /* suspend all COMPONENTs */
688 for_each_card_rtds(card, rtd) {
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 for_each_rtd_components(rtd, i, component) {
694 struct snd_soc_dapm_context *dapm =
695 snd_soc_component_get_dapm(component);
696
697 /*
698 * ignore if component was already suspended
699 */
700 if (snd_soc_component_is_suspended(component))
701 continue;
702
703 /*
704 * If there are paths active then the COMPONENT will be
705 * held with bias _ON and should not be suspended.
706 */
707 switch (snd_soc_dapm_get_bias_level(dapm)) {
708 case SND_SOC_BIAS_STANDBY:
709 /*
710 * If the COMPONENT is capable of idle
711 * bias off then being in STANDBY
712 * means it's doing something,
713 * otherwise fall through.
714 */
715 if (dapm->idle_bias_off) {
716 dev_dbg(component->dev,
717 "ASoC: idle_bias_off CODEC on over suspend\n");
718 break;
719 }
720 fallthrough;
721
722 case SND_SOC_BIAS_OFF:
723 snd_soc_component_suspend(component);
724 if (component->regmap)
725 regcache_mark_dirty(component->regmap);
726 /* deactivate pins to sleep state */
727 pinctrl_pm_select_sleep_state(component->dev);
728 break;
729 default:
730 dev_dbg(component->dev,
731 "ASoC: COMPONENT is on over suspend\n");
732 break;
733 }
734 }
735 }
736
737 snd_soc_card_suspend_post(card);
738
739 return 0;
740}
741EXPORT_SYMBOL_GPL(snd_soc_suspend);
742
743/*
744 * deferred resume work, so resume can complete before we finished
745 * setting our codec back up, which can be very slow on I2C
746 */
747static void soc_resume_deferred(struct work_struct *work)
748{
749 struct snd_soc_card *card =
750 container_of(work, struct snd_soc_card,
751 deferred_resume_work);
752 struct snd_soc_component *component;
753
754 /*
755 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
756 * so userspace apps are blocked from touching us
757 */
758
759 dev_dbg(card->dev, "ASoC: starting resume work\n");
760
761 /* Bring us up into D2 so that DAPM starts enabling things */
762 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
763
764 snd_soc_card_resume_pre(card);
765
766 for_each_card_components(card, component) {
767 if (snd_soc_component_is_suspended(component))
768 snd_soc_component_resume(component);
769 }
770
771 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
772
773 /* unmute any active DACs */
774 soc_playback_digital_mute(card, 0);
775
776 snd_soc_card_resume_post(card);
777
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
779
780 /* Recheck all endpoints too, their state is affected by suspend */
781 dapm_mark_endpoints_dirty(card);
782 snd_soc_dapm_sync(&card->dapm);
783
784 /* userspace can access us now we are back as we were before */
785 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
786}
787
788/* powers up audio subsystem after a suspend */
789int snd_soc_resume(struct device *dev)
790{
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 struct snd_soc_component *component;
793
794 /* If the card is not initialized yet there is nothing to do */
795 if (!snd_soc_card_is_instantiated(card))
796 return 0;
797
798 /* activate pins from sleep state */
799 for_each_card_components(card, component)
800 if (snd_soc_component_active(component))
801 pinctrl_pm_select_default_state(component->dev);
802
803 dev_dbg(dev, "ASoC: Scheduling resume work\n");
804 if (!schedule_work(&card->deferred_resume_work))
805 dev_err(dev, "ASoC: resume work item may be lost\n");
806
807 return 0;
808}
809EXPORT_SYMBOL_GPL(snd_soc_resume);
810
811static void soc_resume_init(struct snd_soc_card *card)
812{
813 /* deferred resume work */
814 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
815}
816#else
817#define snd_soc_suspend NULL
818#define snd_soc_resume NULL
819static inline void soc_resume_init(struct snd_soc_card *card) { }
820#endif
821
822static struct device_node
823*soc_component_to_node(struct snd_soc_component *component)
824{
825 struct device_node *of_node;
826
827 of_node = component->dev->of_node;
828 if (!of_node && component->dev->parent)
829 of_node = component->dev->parent->of_node;
830
831 return of_node;
832}
833
834struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, struct of_phandle_args *args)
835{
836 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
837
838 if (!ret)
839 return NULL;
840
841 *ret = *args;
842
843 return ret;
844}
845EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
846
847static int snd_soc_is_matching_component(
848 const struct snd_soc_dai_link_component *dlc,
849 struct snd_soc_component *component)
850{
851 struct device_node *component_of_node;
852
853 if (!dlc)
854 return 0;
855
856 if (dlc->dai_args) {
857 struct snd_soc_dai *dai;
858
859 for_each_component_dais(component, dai)
860 if (snd_soc_is_matching_dai(dlc, dai))
861 return 1;
862 return 0;
863 }
864
865 component_of_node = soc_component_to_node(component);
866
867 if (dlc->of_node && component_of_node != dlc->of_node)
868 return 0;
869 if (dlc->name && strcmp(component->name, dlc->name))
870 return 0;
871
872 return 1;
873}
874
875static struct snd_soc_component *soc_find_component(
876 const struct snd_soc_dai_link_component *dlc)
877{
878 struct snd_soc_component *component;
879
880 lockdep_assert_held(&client_mutex);
881
882 /*
883 * NOTE
884 *
885 * It returns *1st* found component, but some driver
886 * has few components by same of_node/name
887 * ex)
888 * CPU component and generic DMAEngine component
889 */
890 for_each_component(component)
891 if (snd_soc_is_matching_component(dlc, component))
892 return component;
893
894 return NULL;
895}
896
897/**
898 * snd_soc_find_dai - Find a registered DAI
899 *
900 * @dlc: name of the DAI or the DAI driver and optional component info to match
901 *
902 * This function will search all registered components and their DAIs to
903 * find the DAI of the same name. The component's of_node and name
904 * should also match if being specified.
905 *
906 * Return: pointer of DAI, or NULL if not found.
907 */
908struct snd_soc_dai *snd_soc_find_dai(
909 const struct snd_soc_dai_link_component *dlc)
910{
911 struct snd_soc_component *component;
912 struct snd_soc_dai *dai;
913
914 lockdep_assert_held(&client_mutex);
915
916 /* Find CPU DAI from registered DAIs */
917 for_each_component(component)
918 if (snd_soc_is_matching_component(dlc, component))
919 for_each_component_dais(component, dai)
920 if (snd_soc_is_matching_dai(dlc, dai))
921 return dai;
922
923 return NULL;
924}
925EXPORT_SYMBOL_GPL(snd_soc_find_dai);
926
927struct snd_soc_dai *snd_soc_find_dai_with_mutex(
928 const struct snd_soc_dai_link_component *dlc)
929{
930 struct snd_soc_dai *dai;
931
932 mutex_lock(&client_mutex);
933 dai = snd_soc_find_dai(dlc);
934 mutex_unlock(&client_mutex);
935
936 return dai;
937}
938EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
939
940static int soc_dai_link_sanity_check(struct snd_soc_card *card,
941 struct snd_soc_dai_link *link)
942{
943 int i;
944 struct snd_soc_dai_link_component *dlc;
945
946 /* Codec check */
947 for_each_link_codecs(link, i, dlc) {
948 /*
949 * Codec must be specified by 1 of name or OF node,
950 * not both or neither.
951 */
952 if (snd_soc_dlc_component_is_invalid(dlc))
953 goto component_invalid;
954
955 if (snd_soc_dlc_component_is_empty(dlc))
956 goto component_empty;
957
958 /* Codec DAI name must be specified */
959 if (snd_soc_dlc_dai_is_empty(dlc))
960 goto dai_empty;
961
962 /*
963 * Defer card registration if codec component is not added to
964 * component list.
965 */
966 if (!soc_find_component(dlc))
967 goto component_not_found;
968 }
969
970 /* Platform check */
971 for_each_link_platforms(link, i, dlc) {
972 /*
973 * Platform may be specified by either name or OF node, but it
974 * can be left unspecified, then no components will be inserted
975 * in the rtdcom list
976 */
977 if (snd_soc_dlc_component_is_invalid(dlc))
978 goto component_invalid;
979
980 if (snd_soc_dlc_component_is_empty(dlc))
981 goto component_empty;
982
983 /*
984 * Defer card registration if platform component is not added to
985 * component list.
986 */
987 if (!soc_find_component(dlc))
988 goto component_not_found;
989 }
990
991 /* CPU check */
992 for_each_link_cpus(link, i, dlc) {
993 /*
994 * CPU device may be specified by either name or OF node, but
995 * can be left unspecified, and will be matched based on DAI
996 * name alone..
997 */
998 if (snd_soc_dlc_component_is_invalid(dlc))
999 goto component_invalid;
1000
1001
1002 if (snd_soc_dlc_component_is_empty(dlc)) {
1003 /*
1004 * At least one of CPU DAI name or CPU device name/node must be specified
1005 */
1006 if (snd_soc_dlc_dai_is_empty(dlc))
1007 goto component_dai_empty;
1008 } else {
1009 /*
1010 * Defer card registration if Component is not added
1011 */
1012 if (!soc_find_component(dlc))
1013 goto component_not_found;
1014 }
1015 }
1016
1017 return 0;
1018
1019component_invalid:
1020 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1021 return -EINVAL;
1022
1023component_empty:
1024 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1025 return -EINVAL;
1026
1027component_not_found:
1028 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1029 return -EPROBE_DEFER;
1030
1031dai_empty:
1032 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1033 return -EINVAL;
1034
1035component_dai_empty:
1036 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1037 return -EINVAL;
1038}
1039
1040#define MAX_DEFAULT_CH_MAP_SIZE 8
1041static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = {
1042 { .cpu = 0, .codec = 0 },
1043 { .cpu = 1, .codec = 1 },
1044 { .cpu = 2, .codec = 2 },
1045 { .cpu = 3, .codec = 3 },
1046 { .cpu = 4, .codec = 4 },
1047 { .cpu = 5, .codec = 5 },
1048 { .cpu = 6, .codec = 6 },
1049 { .cpu = 7, .codec = 7 },
1050};
1051static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = {
1052 { .cpu = 0, .codec = 0 },
1053 { .cpu = 0, .codec = 1 },
1054 { .cpu = 0, .codec = 2 },
1055 { .cpu = 0, .codec = 3 },
1056 { .cpu = 0, .codec = 4 },
1057 { .cpu = 0, .codec = 5 },
1058 { .cpu = 0, .codec = 6 },
1059 { .cpu = 0, .codec = 7 },
1060};
1061static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = {
1062 { .cpu = 0, .codec = 0 },
1063 { .cpu = 1, .codec = 0 },
1064 { .cpu = 2, .codec = 0 },
1065 { .cpu = 3, .codec = 0 },
1066 { .cpu = 4, .codec = 0 },
1067 { .cpu = 5, .codec = 0 },
1068 { .cpu = 6, .codec = 0 },
1069 { .cpu = 7, .codec = 0 },
1070};
1071static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1072 struct snd_soc_dai_link *dai_link)
1073{
1074 struct snd_soc_dai_link_ch_map *ch_maps;
1075 int i;
1076
1077 /*
1078 * dai_link->ch_maps indicates how CPU/Codec are connected.
1079 * It will be a map seen from a larger number of DAI.
1080 * see
1081 * soc.h :: [dai_link->ch_maps Image sample]
1082 */
1083
1084 /* it should have ch_maps if connection was N:M */
1085 if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 &&
1086 dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) {
1087 dev_err(card->dev, "need to have ch_maps when N:M connection (%s)",
1088 dai_link->name);
1089 return -EINVAL;
1090 }
1091
1092 /* do nothing if it has own maps */
1093 if (dai_link->ch_maps)
1094 goto sanity_check;
1095
1096 /* check default map size */
1097 if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE ||
1098 dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) {
1099 dev_err(card->dev, "soc-core.c needs update default_connection_maps");
1100 return -EINVAL;
1101 }
1102
1103 /* Compensate missing map for ... */
1104 if (dai_link->num_cpus == dai_link->num_codecs)
1105 dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */
1106 else if (dai_link->num_cpus < dai_link->num_codecs)
1107 dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */
1108 else
1109 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
1110
1111sanity_check:
1112 dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name);
1113 for_each_link_ch_maps(dai_link, i, ch_maps) {
1114 if ((ch_maps->cpu >= dai_link->num_cpus) ||
1115 (ch_maps->codec >= dai_link->num_codecs)) {
1116 dev_err(card->dev,
1117 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1118 i,
1119 ch_maps->cpu, dai_link->num_cpus,
1120 ch_maps->codec, dai_link->num_codecs);
1121 return -EINVAL;
1122 }
1123
1124 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1125 i, ch_maps->cpu, ch_maps->codec);
1126 }
1127
1128 return 0;
1129}
1130
1131/**
1132 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1133 * @card: The ASoC card to which the pcm_runtime has
1134 * @rtd: The pcm_runtime to remove
1135 *
1136 * This function removes a pcm_runtime from the ASoC card.
1137 */
1138void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1139 struct snd_soc_pcm_runtime *rtd)
1140{
1141 lockdep_assert_held(&client_mutex);
1142
1143 /*
1144 * Notify the machine driver for extra destruction
1145 */
1146 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1147
1148 soc_free_pcm_runtime(rtd);
1149}
1150EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1151
1152/**
1153 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1154 * @card: The ASoC card to which the pcm_runtime is added
1155 * @dai_link: The DAI link to find pcm_runtime
1156 *
1157 * This function adds a pcm_runtime ASoC card by using dai_link.
1158 *
1159 * Note: Topology can use this API to add pcm_runtime when probing the
1160 * topology component. And machine drivers can still define static
1161 * DAI links in dai_link array.
1162 */
1163static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1164 struct snd_soc_dai_link *dai_link)
1165{
1166 struct snd_soc_pcm_runtime *rtd;
1167 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1168 struct snd_soc_component *component;
1169 int i, ret;
1170
1171 lockdep_assert_held(&client_mutex);
1172
1173 /*
1174 * Notify the machine driver for extra initialization
1175 */
1176 ret = snd_soc_card_add_dai_link(card, dai_link);
1177 if (ret < 0)
1178 return ret;
1179
1180 if (dai_link->ignore)
1181 return 0;
1182
1183 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1184
1185 ret = soc_dai_link_sanity_check(card, dai_link);
1186 if (ret < 0)
1187 return ret;
1188
1189 rtd = soc_new_pcm_runtime(card, dai_link);
1190 if (!rtd)
1191 return -ENOMEM;
1192
1193 for_each_link_cpus(dai_link, i, cpu) {
1194 snd_soc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1195 if (!snd_soc_rtd_to_cpu(rtd, i)) {
1196 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1197 cpu->dai_name);
1198 goto _err_defer;
1199 }
1200 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
1201 }
1202
1203 /* Find CODEC from registered CODECs */
1204 for_each_link_codecs(dai_link, i, codec) {
1205 snd_soc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1206 if (!snd_soc_rtd_to_codec(rtd, i)) {
1207 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1208 codec->dai_name);
1209 goto _err_defer;
1210 }
1211
1212 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
1213 }
1214
1215 /* Find PLATFORM from registered PLATFORMs */
1216 for_each_link_platforms(dai_link, i, platform) {
1217 for_each_component(component) {
1218 if (!snd_soc_is_matching_component(platform, component))
1219 continue;
1220
1221 snd_soc_rtd_add_component(rtd, component);
1222 }
1223 }
1224
1225 return 0;
1226
1227_err_defer:
1228 snd_soc_remove_pcm_runtime(card, rtd);
1229 return -EPROBE_DEFER;
1230}
1231
1232int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1233 struct snd_soc_dai_link *dai_link,
1234 int num_dai_link)
1235{
1236 for (int i = 0; i < num_dai_link; i++) {
1237 int ret;
1238
1239 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1240 if (ret < 0)
1241 return ret;
1242
1243 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1244 if (ret < 0)
1245 return ret;
1246 }
1247
1248 return 0;
1249}
1250EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1251
1252static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1253{
1254 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1255 struct snd_soc_dai *dai, *not_used;
1256 u64 pos, possible_fmt;
1257 unsigned int mask = 0, dai_fmt = 0;
1258 int i, j, priority, pri, until;
1259
1260 /*
1261 * Get selectable format from each DAIs.
1262 *
1263 ****************************
1264 * NOTE
1265 * Using .auto_selectable_formats is not mandatory,
1266 * we can select format manually from Sound Card.
1267 * When use it, driver should list well tested format only.
1268 ****************************
1269 *
1270 * ex)
1271 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1272 * (A) (B) (C)
1273 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1274 * DAI1 : { 0xF000, 0x0F00 };
1275 * (X) (Y)
1276 *
1277 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1278 * Here is dev_dbg() message and comments
1279 *
1280 * priority = 1
1281 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1282 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1283 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1284 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1285 * priority = 2
1286 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1287 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1288 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1289 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1290 * priority = 3
1291 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1292 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1293 * found auto selected format: 0000000000000F00
1294 */
1295 until = snd_soc_dai_get_fmt_max_priority(rtd);
1296 for (priority = 1; priority <= until; priority++) {
1297 for_each_rtd_dais(rtd, j, not_used) {
1298
1299 possible_fmt = ULLONG_MAX;
1300 for_each_rtd_dais(rtd, i, dai) {
1301 u64 fmt = 0;
1302
1303 pri = (j >= i) ? priority : priority - 1;
1304 fmt = snd_soc_dai_get_fmt(dai, pri);
1305 possible_fmt &= fmt;
1306 }
1307 if (possible_fmt)
1308 goto found;
1309 }
1310 }
1311 /* Not Found */
1312 return;
1313found:
1314 /*
1315 * convert POSSIBLE_DAIFMT to DAIFMT
1316 *
1317 * Some basic/default settings on each is defined as 0.
1318 * see
1319 * SND_SOC_DAIFMT_NB_NF
1320 * SND_SOC_DAIFMT_GATED
1321 *
1322 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1323 * these value, and will be overwrite to auto selected value.
1324 *
1325 * To avoid such issue, loop from 63 to 0 here.
1326 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1327 * Basic/Default settings of each part and above are defined
1328 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1329 */
1330 for (i = 63; i >= 0; i--) {
1331 pos = 1ULL << i;
1332 switch (possible_fmt & pos) {
1333 /*
1334 * for format
1335 */
1336 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1337 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1338 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1339 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1340 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1341 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1342 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1343 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1344 break;
1345 /*
1346 * for clock
1347 */
1348 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1349 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1350 break;
1351 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1352 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1353 break;
1354 /*
1355 * for clock invert
1356 */
1357 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1358 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1359 break;
1360 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1361 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1362 break;
1363 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1364 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1365 break;
1366 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1367 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1368 break;
1369 /*
1370 * for clock provider / consumer
1371 */
1372 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1373 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1374 break;
1375 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1376 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1377 break;
1378 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1379 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1380 break;
1381 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1382 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1383 break;
1384 }
1385 }
1386
1387 /*
1388 * Some driver might have very complex limitation.
1389 * In such case, user want to auto-select non-limitation part,
1390 * and want to manually specify complex part.
1391 *
1392 * Or for example, if both CPU and Codec can be clock provider,
1393 * but because of its quality, user want to specify it manually.
1394 *
1395 * Use manually specified settings if sound card did.
1396 */
1397 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1398 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1399 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1400 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1401 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1402 mask |= SND_SOC_DAIFMT_INV_MASK;
1403 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1404 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1405
1406 dai_link->dai_fmt |= (dai_fmt & mask);
1407}
1408
1409/**
1410 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1411 * @rtd: The runtime for which the DAI link format should be changed
1412 * @dai_fmt: The new DAI link format
1413 *
1414 * This function updates the DAI link format for all DAIs connected to the DAI
1415 * link for the specified runtime.
1416 *
1417 * Note: For setups with a static format set the dai_fmt field in the
1418 * corresponding snd_dai_link struct instead of using this function.
1419 *
1420 * Returns 0 on success, otherwise a negative error code.
1421 */
1422int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1423 unsigned int dai_fmt)
1424{
1425 struct snd_soc_dai *cpu_dai;
1426 struct snd_soc_dai *codec_dai;
1427 unsigned int i;
1428 int ret;
1429
1430 if (!dai_fmt)
1431 return 0;
1432
1433 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1434 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1435 if (ret != 0 && ret != -ENOTSUPP)
1436 return ret;
1437 }
1438
1439 /* Flip the polarity for the "CPU" end of link */
1440 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1441
1442 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1443 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1444 if (ret != 0 && ret != -ENOTSUPP)
1445 return ret;
1446 }
1447
1448 return 0;
1449}
1450EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1451
1452static int soc_init_pcm_runtime(struct snd_soc_card *card,
1453 struct snd_soc_pcm_runtime *rtd)
1454{
1455 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1456 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1457 struct snd_soc_component *component;
1458 int ret, num, i;
1459
1460 /* do machine specific initialization */
1461 ret = snd_soc_link_init(rtd);
1462 if (ret < 0)
1463 return ret;
1464
1465 snd_soc_runtime_get_dai_fmt(rtd);
1466 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1467 if (ret)
1468 goto err;
1469
1470 /* add DPCM sysfs entries */
1471 soc_dpcm_debugfs_add(rtd);
1472
1473 num = rtd->num;
1474
1475 /*
1476 * most drivers will register their PCMs using DAI link ordering but
1477 * topology based drivers can use the DAI link id field to set PCM
1478 * device number and then use rtd + a base offset of the BEs.
1479 */
1480 for_each_rtd_components(rtd, i, component) {
1481 if (!component->driver->use_dai_pcm_id)
1482 continue;
1483
1484 if (rtd->dai_link->no_pcm)
1485 num += component->driver->be_pcm_base;
1486 else
1487 num = rtd->dai_link->id;
1488 }
1489
1490 /* create compress_device if possible */
1491 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1492 if (ret != -ENOTSUPP)
1493 goto err;
1494
1495 /* create the pcm */
1496 ret = soc_new_pcm(rtd, num);
1497 if (ret < 0) {
1498 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1499 dai_link->stream_name, ret);
1500 goto err;
1501 }
1502
1503 ret = snd_soc_pcm_dai_new(rtd);
1504 if (ret < 0)
1505 goto err;
1506
1507 rtd->initialized = true;
1508
1509 return 0;
1510err:
1511 snd_soc_link_exit(rtd);
1512 return ret;
1513}
1514
1515static void soc_set_name_prefix(struct snd_soc_card *card,
1516 struct snd_soc_component *component)
1517{
1518 struct device_node *of_node = soc_component_to_node(component);
1519 const char *str;
1520 int ret, i;
1521
1522 for (i = 0; i < card->num_configs; i++) {
1523 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1524
1525 if (snd_soc_is_matching_component(&map->dlc, component) &&
1526 map->name_prefix) {
1527 component->name_prefix = map->name_prefix;
1528 return;
1529 }
1530 }
1531
1532 /*
1533 * If there is no configuration table or no match in the table,
1534 * check if a prefix is provided in the node
1535 */
1536 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1537 if (ret < 0)
1538 return;
1539
1540 component->name_prefix = str;
1541}
1542
1543static void soc_remove_component(struct snd_soc_component *component,
1544 int probed)
1545{
1546
1547 if (!component->card)
1548 return;
1549
1550 if (probed)
1551 snd_soc_component_remove(component);
1552
1553 list_del_init(&component->card_list);
1554 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1555 soc_cleanup_component_debugfs(component);
1556 component->card = NULL;
1557 snd_soc_component_module_put_when_remove(component);
1558}
1559
1560static int soc_probe_component(struct snd_soc_card *card,
1561 struct snd_soc_component *component)
1562{
1563 struct snd_soc_dapm_context *dapm =
1564 snd_soc_component_get_dapm(component);
1565 struct snd_soc_dai *dai;
1566 int probed = 0;
1567 int ret;
1568
1569 if (snd_soc_component_is_dummy(component))
1570 return 0;
1571
1572 if (component->card) {
1573 if (component->card != card) {
1574 dev_err(component->dev,
1575 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1576 component->name, card->name, component->card->name);
1577 return -ENODEV;
1578 }
1579 return 0;
1580 }
1581
1582 ret = snd_soc_component_module_get_when_probe(component);
1583 if (ret < 0)
1584 return ret;
1585
1586 component->card = card;
1587 soc_set_name_prefix(card, component);
1588
1589 soc_init_component_debugfs(component);
1590
1591 snd_soc_dapm_init(dapm, card, component);
1592
1593 ret = snd_soc_dapm_new_controls(dapm,
1594 component->driver->dapm_widgets,
1595 component->driver->num_dapm_widgets);
1596
1597 if (ret != 0) {
1598 dev_err(component->dev,
1599 "Failed to create new controls %d\n", ret);
1600 goto err_probe;
1601 }
1602
1603 for_each_component_dais(component, dai) {
1604 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1605 if (ret != 0) {
1606 dev_err(component->dev,
1607 "Failed to create DAI widgets %d\n", ret);
1608 goto err_probe;
1609 }
1610 }
1611
1612 ret = snd_soc_component_probe(component);
1613 if (ret < 0)
1614 goto err_probe;
1615
1616 WARN(dapm->idle_bias_off &&
1617 dapm->bias_level != SND_SOC_BIAS_OFF,
1618 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1619 component->name);
1620 probed = 1;
1621
1622 /*
1623 * machine specific init
1624 * see
1625 * snd_soc_component_set_aux()
1626 */
1627 ret = snd_soc_component_init(component);
1628 if (ret < 0)
1629 goto err_probe;
1630
1631 ret = snd_soc_add_component_controls(component,
1632 component->driver->controls,
1633 component->driver->num_controls);
1634 if (ret < 0)
1635 goto err_probe;
1636
1637 ret = snd_soc_dapm_add_routes(dapm,
1638 component->driver->dapm_routes,
1639 component->driver->num_dapm_routes);
1640 if (ret < 0) {
1641 if (card->disable_route_checks) {
1642 dev_info(card->dev,
1643 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1644 __func__);
1645 } else {
1646 dev_err(card->dev,
1647 "%s: snd_soc_dapm_add_routes failed: %d\n",
1648 __func__, ret);
1649 goto err_probe;
1650 }
1651 }
1652
1653 /* see for_each_card_components */
1654 list_add(&component->card_list, &card->component_dev_list);
1655
1656err_probe:
1657 if (ret < 0)
1658 soc_remove_component(component, probed);
1659
1660 return ret;
1661}
1662
1663static void soc_remove_link_dais(struct snd_soc_card *card)
1664{
1665 struct snd_soc_pcm_runtime *rtd;
1666 int order;
1667
1668 for_each_comp_order(order) {
1669 for_each_card_rtds(card, rtd) {
1670 /* remove all rtd connected DAIs in good order */
1671 snd_soc_pcm_dai_remove(rtd, order);
1672 }
1673 }
1674}
1675
1676static int soc_probe_link_dais(struct snd_soc_card *card)
1677{
1678 struct snd_soc_pcm_runtime *rtd;
1679 int order, ret;
1680
1681 for_each_comp_order(order) {
1682 for_each_card_rtds(card, rtd) {
1683 /* probe all rtd connected DAIs in good order */
1684 ret = snd_soc_pcm_dai_probe(rtd, order);
1685 if (ret)
1686 return ret;
1687 }
1688 }
1689
1690 return 0;
1691}
1692
1693static void soc_remove_link_components(struct snd_soc_card *card)
1694{
1695 struct snd_soc_component *component;
1696 struct snd_soc_pcm_runtime *rtd;
1697 int i, order;
1698
1699 for_each_comp_order(order) {
1700 for_each_card_rtds(card, rtd) {
1701 for_each_rtd_components(rtd, i, component) {
1702 if (component->driver->remove_order != order)
1703 continue;
1704
1705 soc_remove_component(component, 1);
1706 }
1707 }
1708 }
1709}
1710
1711static int soc_probe_link_components(struct snd_soc_card *card)
1712{
1713 struct snd_soc_component *component;
1714 struct snd_soc_pcm_runtime *rtd;
1715 int i, ret, order;
1716
1717 for_each_comp_order(order) {
1718 for_each_card_rtds(card, rtd) {
1719 for_each_rtd_components(rtd, i, component) {
1720 if (component->driver->probe_order != order)
1721 continue;
1722
1723 ret = soc_probe_component(card, component);
1724 if (ret < 0)
1725 return ret;
1726 }
1727 }
1728 }
1729
1730 return 0;
1731}
1732
1733static void soc_unbind_aux_dev(struct snd_soc_card *card)
1734{
1735 struct snd_soc_component *component, *_component;
1736
1737 for_each_card_auxs_safe(card, component, _component) {
1738 /* for snd_soc_component_init() */
1739 snd_soc_component_set_aux(component, NULL);
1740 list_del(&component->card_aux_list);
1741 }
1742}
1743
1744static int soc_bind_aux_dev(struct snd_soc_card *card)
1745{
1746 struct snd_soc_component *component;
1747 struct snd_soc_aux_dev *aux;
1748 int i;
1749
1750 for_each_card_pre_auxs(card, i, aux) {
1751 /* codecs, usually analog devices */
1752 component = soc_find_component(&aux->dlc);
1753 if (!component)
1754 return -EPROBE_DEFER;
1755
1756 /* for snd_soc_component_init() */
1757 snd_soc_component_set_aux(component, aux);
1758 /* see for_each_card_auxs */
1759 list_add(&component->card_aux_list, &card->aux_comp_list);
1760 }
1761 return 0;
1762}
1763
1764static int soc_probe_aux_devices(struct snd_soc_card *card)
1765{
1766 struct snd_soc_component *component;
1767 int order;
1768 int ret;
1769
1770 for_each_comp_order(order) {
1771 for_each_card_auxs(card, component) {
1772 if (component->driver->probe_order != order)
1773 continue;
1774
1775 ret = soc_probe_component(card, component);
1776 if (ret < 0)
1777 return ret;
1778 }
1779 }
1780
1781 return 0;
1782}
1783
1784static void soc_remove_aux_devices(struct snd_soc_card *card)
1785{
1786 struct snd_soc_component *comp, *_comp;
1787 int order;
1788
1789 for_each_comp_order(order) {
1790 for_each_card_auxs_safe(card, comp, _comp) {
1791 if (comp->driver->remove_order == order)
1792 soc_remove_component(comp, 1);
1793 }
1794 }
1795}
1796
1797#ifdef CONFIG_DMI
1798/*
1799 * If a DMI filed contain strings in this blacklist (e.g.
1800 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1801 * as invalid and dropped when setting the card long name from DMI info.
1802 */
1803static const char * const dmi_blacklist[] = {
1804 "To be filled by OEM",
1805 "TBD by OEM",
1806 "Default String",
1807 "Board Manufacturer",
1808 "Board Vendor Name",
1809 "Board Product Name",
1810 NULL, /* terminator */
1811};
1812
1813/*
1814 * Trim special characters, and replace '-' with '_' since '-' is used to
1815 * separate different DMI fields in the card long name. Only number and
1816 * alphabet characters and a few separator characters are kept.
1817 */
1818static void cleanup_dmi_name(char *name)
1819{
1820 int i, j = 0;
1821
1822 for (i = 0; name[i]; i++) {
1823 if (isalnum(name[i]) || (name[i] == '.')
1824 || (name[i] == '_'))
1825 name[j++] = name[i];
1826 else if (name[i] == '-')
1827 name[j++] = '_';
1828 }
1829
1830 name[j] = '\0';
1831}
1832
1833/*
1834 * Check if a DMI field is valid, i.e. not containing any string
1835 * in the black list.
1836 */
1837static int is_dmi_valid(const char *field)
1838{
1839 int i = 0;
1840
1841 while (dmi_blacklist[i]) {
1842 if (strstr(field, dmi_blacklist[i]))
1843 return 0;
1844 i++;
1845 }
1846
1847 return 1;
1848}
1849
1850/*
1851 * Append a string to card->dmi_longname with character cleanups.
1852 */
1853static void append_dmi_string(struct snd_soc_card *card, const char *str)
1854{
1855 char *dst = card->dmi_longname;
1856 size_t dst_len = sizeof(card->dmi_longname);
1857 size_t len;
1858
1859 len = strlen(dst);
1860 snprintf(dst + len, dst_len - len, "-%s", str);
1861
1862 len++; /* skip the separator "-" */
1863 if (len < dst_len)
1864 cleanup_dmi_name(dst + len);
1865}
1866
1867/**
1868 * snd_soc_set_dmi_name() - Register DMI names to card
1869 * @card: The card to register DMI names
1870 * @flavour: The flavour "differentiator" for the card amongst its peers.
1871 *
1872 * An Intel machine driver may be used by many different devices but are
1873 * difficult for userspace to differentiate, since machine drivers usually
1874 * use their own name as the card short name and leave the card long name
1875 * blank. To differentiate such devices and fix bugs due to lack of
1876 * device-specific configurations, this function allows DMI info to be used
1877 * as the sound card long name, in the format of
1878 * "vendor-product-version-board"
1879 * (Character '-' is used to separate different DMI fields here).
1880 * This will help the user space to load the device-specific Use Case Manager
1881 * (UCM) configurations for the card.
1882 *
1883 * Possible card long names may be:
1884 * DellInc.-XPS139343-01-0310JH
1885 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1886 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1887 *
1888 * This function also supports flavoring the card longname to provide
1889 * the extra differentiation, like "vendor-product-version-board-flavor".
1890 *
1891 * We only keep number and alphabet characters and a few separator characters
1892 * in the card long name since UCM in the user space uses the card long names
1893 * as card configuration directory names and AudoConf cannot support special
1894 * characters like SPACE.
1895 *
1896 * Returns 0 on success, otherwise a negative error code.
1897 */
1898int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1899{
1900 const char *vendor, *product, *board;
1901
1902 if (card->long_name)
1903 return 0; /* long name already set by driver or from DMI */
1904
1905 if (!dmi_available)
1906 return 0;
1907
1908 /* make up dmi long name as: vendor-product-version-board */
1909 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1910 if (!vendor || !is_dmi_valid(vendor)) {
1911 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1912 return 0;
1913 }
1914
1915 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1916 cleanup_dmi_name(card->dmi_longname);
1917
1918 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1919 if (product && is_dmi_valid(product)) {
1920 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1921
1922 append_dmi_string(card, product);
1923
1924 /*
1925 * some vendors like Lenovo may only put a self-explanatory
1926 * name in the product version field
1927 */
1928 if (product_version && is_dmi_valid(product_version))
1929 append_dmi_string(card, product_version);
1930 }
1931
1932 board = dmi_get_system_info(DMI_BOARD_NAME);
1933 if (board && is_dmi_valid(board)) {
1934 if (!product || strcasecmp(board, product))
1935 append_dmi_string(card, board);
1936 } else if (!product) {
1937 /* fall back to using legacy name */
1938 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1939 return 0;
1940 }
1941
1942 /* Add flavour to dmi long name */
1943 if (flavour)
1944 append_dmi_string(card, flavour);
1945
1946 /* set the card long name */
1947 card->long_name = card->dmi_longname;
1948
1949 return 0;
1950}
1951EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1952#endif /* CONFIG_DMI */
1953
1954static void soc_check_tplg_fes(struct snd_soc_card *card)
1955{
1956 struct snd_soc_component *component;
1957 const struct snd_soc_component_driver *comp_drv;
1958 struct snd_soc_dai_link *dai_link;
1959 int i;
1960
1961 for_each_component(component) {
1962
1963 /* does this component override BEs ? */
1964 if (!component->driver->ignore_machine)
1965 continue;
1966
1967 /* for this machine ? */
1968 if (!strcmp(component->driver->ignore_machine,
1969 card->dev->driver->name))
1970 goto match;
1971 if (strcmp(component->driver->ignore_machine,
1972 dev_name(card->dev)))
1973 continue;
1974match:
1975 /* machine matches, so override the rtd data */
1976 for_each_card_prelinks(card, i, dai_link) {
1977
1978 /* ignore this FE */
1979 if (dai_link->dynamic) {
1980 dai_link->ignore = true;
1981 continue;
1982 }
1983
1984 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1985 card->dai_link[i].name);
1986
1987 /* override platform component */
1988 if (!dai_link->platforms) {
1989 dev_err(card->dev, "init platform error");
1990 continue;
1991 }
1992
1993 if (component->dev->of_node)
1994 dai_link->platforms->of_node = component->dev->of_node;
1995 else
1996 dai_link->platforms->name = component->name;
1997
1998 /* convert non BE into BE */
1999 if (!dai_link->no_pcm) {
2000 dai_link->no_pcm = 1;
2001
2002 if (dai_link->dpcm_playback)
2003 dev_warn(card->dev,
2004 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2005 dai_link->name);
2006 if (dai_link->dpcm_capture)
2007 dev_warn(card->dev,
2008 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
2009 dai_link->name);
2010
2011 /* convert normal link into DPCM one */
2012 if (!(dai_link->dpcm_playback ||
2013 dai_link->dpcm_capture)) {
2014 dai_link->dpcm_playback = !dai_link->capture_only;
2015 dai_link->dpcm_capture = !dai_link->playback_only;
2016 }
2017 }
2018
2019 /*
2020 * override any BE fixups
2021 * see
2022 * snd_soc_link_be_hw_params_fixup()
2023 */
2024 dai_link->be_hw_params_fixup =
2025 component->driver->be_hw_params_fixup;
2026
2027 /*
2028 * most BE links don't set stream name, so set it to
2029 * dai link name if it's NULL to help bind widgets.
2030 */
2031 if (!dai_link->stream_name)
2032 dai_link->stream_name = dai_link->name;
2033 }
2034
2035 /* Inform userspace we are using alternate topology */
2036 if (component->driver->topology_name_prefix) {
2037
2038 /* topology shortname created? */
2039 if (!card->topology_shortname_created) {
2040 comp_drv = component->driver;
2041
2042 snprintf(card->topology_shortname, 32, "%s-%s",
2043 comp_drv->topology_name_prefix,
2044 card->name);
2045 card->topology_shortname_created = true;
2046 }
2047
2048 /* use topology shortname */
2049 card->name = card->topology_shortname;
2050 }
2051 }
2052}
2053
2054#define soc_setup_card_name(card, name, name1, name2) \
2055 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2056static void __soc_setup_card_name(struct snd_soc_card *card,
2057 char *name, int len,
2058 const char *name1, const char *name2)
2059{
2060 const char *src = name1 ? name1 : name2;
2061 int i;
2062
2063 snprintf(name, len, "%s", src);
2064
2065 if (name != card->snd_card->driver)
2066 return;
2067
2068 /*
2069 * Name normalization (driver field)
2070 *
2071 * The driver name is somewhat special, as it's used as a key for
2072 * searches in the user-space.
2073 *
2074 * ex)
2075 * "abcd??efg" -> "abcd__efg"
2076 */
2077 for (i = 0; i < len; i++) {
2078 switch (name[i]) {
2079 case '_':
2080 case '-':
2081 case '\0':
2082 break;
2083 default:
2084 if (!isalnum(name[i]))
2085 name[i] = '_';
2086 break;
2087 }
2088 }
2089
2090 /*
2091 * The driver field should contain a valid string from the user view.
2092 * The wrapping usually does not work so well here. Set a smaller string
2093 * in the specific ASoC driver.
2094 */
2095 if (strlen(src) > len - 1)
2096 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2097}
2098
2099static void soc_cleanup_card_resources(struct snd_soc_card *card)
2100{
2101 struct snd_soc_pcm_runtime *rtd, *n;
2102
2103 if (card->snd_card)
2104 snd_card_disconnect_sync(card->snd_card);
2105
2106 snd_soc_dapm_shutdown(card);
2107
2108 /* release machine specific resources */
2109 for_each_card_rtds(card, rtd)
2110 if (rtd->initialized)
2111 snd_soc_link_exit(rtd);
2112 /* remove and free each DAI */
2113 soc_remove_link_dais(card);
2114 soc_remove_link_components(card);
2115
2116 for_each_card_rtds_safe(card, rtd, n)
2117 snd_soc_remove_pcm_runtime(card, rtd);
2118
2119 /* remove auxiliary devices */
2120 soc_remove_aux_devices(card);
2121 soc_unbind_aux_dev(card);
2122
2123 snd_soc_dapm_free(&card->dapm);
2124 soc_cleanup_card_debugfs(card);
2125
2126 /* remove the card */
2127 snd_soc_card_remove(card);
2128
2129 if (card->snd_card) {
2130 snd_card_free(card->snd_card);
2131 card->snd_card = NULL;
2132 }
2133}
2134
2135static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2136{
2137 if (snd_soc_card_is_instantiated(card)) {
2138 card->instantiated = false;
2139 snd_soc_flush_all_delayed_work(card);
2140
2141 soc_cleanup_card_resources(card);
2142 if (!unregister)
2143 list_add(&card->list, &unbind_card_list);
2144 } else {
2145 if (unregister)
2146 list_del(&card->list);
2147 }
2148}
2149
2150static int snd_soc_bind_card(struct snd_soc_card *card)
2151{
2152 struct snd_soc_pcm_runtime *rtd;
2153 struct snd_soc_component *component;
2154 int ret;
2155
2156 mutex_lock(&client_mutex);
2157 snd_soc_card_mutex_lock_root(card);
2158
2159 snd_soc_fill_dummy_dai(card);
2160
2161 snd_soc_dapm_init(&card->dapm, card, NULL);
2162
2163 /* check whether any platform is ignore machine FE and using topology */
2164 soc_check_tplg_fes(card);
2165
2166 /* bind aux_devs too */
2167 ret = soc_bind_aux_dev(card);
2168 if (ret < 0)
2169 goto probe_end;
2170
2171 /* add predefined DAI links to the list */
2172 card->num_rtd = 0;
2173 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2174 if (ret < 0)
2175 goto probe_end;
2176
2177 /* card bind complete so register a sound card */
2178 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2179 card->owner, 0, &card->snd_card);
2180 if (ret < 0) {
2181 dev_err(card->dev,
2182 "ASoC: can't create sound card for card %s: %d\n",
2183 card->name, ret);
2184 goto probe_end;
2185 }
2186
2187 soc_init_card_debugfs(card);
2188
2189 soc_resume_init(card);
2190
2191 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2192 card->num_dapm_widgets);
2193 if (ret < 0)
2194 goto probe_end;
2195
2196 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2197 card->num_of_dapm_widgets);
2198 if (ret < 0)
2199 goto probe_end;
2200
2201 /* initialise the sound card only once */
2202 ret = snd_soc_card_probe(card);
2203 if (ret < 0)
2204 goto probe_end;
2205
2206 /* probe all components used by DAI links on this card */
2207 ret = soc_probe_link_components(card);
2208 if (ret < 0) {
2209 if (ret != -EPROBE_DEFER) {
2210 dev_err(card->dev,
2211 "ASoC: failed to instantiate card %d\n", ret);
2212 }
2213 goto probe_end;
2214 }
2215
2216 /* probe auxiliary components */
2217 ret = soc_probe_aux_devices(card);
2218 if (ret < 0) {
2219 dev_err(card->dev,
2220 "ASoC: failed to probe aux component %d\n", ret);
2221 goto probe_end;
2222 }
2223
2224 /* probe all DAI links on this card */
2225 ret = soc_probe_link_dais(card);
2226 if (ret < 0) {
2227 dev_err(card->dev,
2228 "ASoC: failed to instantiate card %d\n", ret);
2229 goto probe_end;
2230 }
2231
2232 for_each_card_rtds(card, rtd) {
2233 ret = soc_init_pcm_runtime(card, rtd);
2234 if (ret < 0)
2235 goto probe_end;
2236 }
2237
2238 snd_soc_dapm_link_dai_widgets(card);
2239 snd_soc_dapm_connect_dai_link_widgets(card);
2240
2241 ret = snd_soc_add_card_controls(card, card->controls,
2242 card->num_controls);
2243 if (ret < 0)
2244 goto probe_end;
2245
2246 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2247 card->num_dapm_routes);
2248 if (ret < 0) {
2249 if (card->disable_route_checks) {
2250 dev_info(card->dev,
2251 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2252 __func__);
2253 } else {
2254 dev_err(card->dev,
2255 "%s: snd_soc_dapm_add_routes failed: %d\n",
2256 __func__, ret);
2257 goto probe_end;
2258 }
2259 }
2260
2261 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2262 card->num_of_dapm_routes);
2263 if (ret < 0)
2264 goto probe_end;
2265
2266 /* try to set some sane longname if DMI is available */
2267 snd_soc_set_dmi_name(card, NULL);
2268
2269 soc_setup_card_name(card, card->snd_card->shortname,
2270 card->name, NULL);
2271 soc_setup_card_name(card, card->snd_card->longname,
2272 card->long_name, card->name);
2273 soc_setup_card_name(card, card->snd_card->driver,
2274 card->driver_name, card->name);
2275
2276 if (card->components) {
2277 /* the current implementation of snd_component_add() accepts */
2278 /* multiple components in the string separated by space, */
2279 /* but the string collision (identical string) check might */
2280 /* not work correctly */
2281 ret = snd_component_add(card->snd_card, card->components);
2282 if (ret < 0) {
2283 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2284 card->name, ret);
2285 goto probe_end;
2286 }
2287 }
2288
2289 ret = snd_soc_card_late_probe(card);
2290 if (ret < 0)
2291 goto probe_end;
2292
2293 snd_soc_dapm_new_widgets(card);
2294 snd_soc_card_fixup_controls(card);
2295
2296 ret = snd_card_register(card->snd_card);
2297 if (ret < 0) {
2298 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2299 ret);
2300 goto probe_end;
2301 }
2302
2303 card->instantiated = 1;
2304 dapm_mark_endpoints_dirty(card);
2305 snd_soc_dapm_sync(&card->dapm);
2306
2307 /* deactivate pins to sleep state */
2308 for_each_card_components(card, component)
2309 if (!snd_soc_component_active(component))
2310 pinctrl_pm_select_sleep_state(component->dev);
2311
2312probe_end:
2313 if (ret < 0)
2314 soc_cleanup_card_resources(card);
2315
2316 snd_soc_card_mutex_unlock(card);
2317 mutex_unlock(&client_mutex);
2318
2319 return ret;
2320}
2321
2322/* probes a new socdev */
2323static int soc_probe(struct platform_device *pdev)
2324{
2325 struct snd_soc_card *card = platform_get_drvdata(pdev);
2326
2327 /*
2328 * no card, so machine driver should be registering card
2329 * we should not be here in that case so ret error
2330 */
2331 if (!card)
2332 return -EINVAL;
2333
2334 dev_warn(&pdev->dev,
2335 "ASoC: machine %s should use snd_soc_register_card()\n",
2336 card->name);
2337
2338 /* Bodge while we unpick instantiation */
2339 card->dev = &pdev->dev;
2340
2341 return devm_snd_soc_register_card(&pdev->dev, card);
2342}
2343
2344int snd_soc_poweroff(struct device *dev)
2345{
2346 struct snd_soc_card *card = dev_get_drvdata(dev);
2347 struct snd_soc_component *component;
2348
2349 if (!snd_soc_card_is_instantiated(card))
2350 return 0;
2351
2352 /*
2353 * Flush out pmdown_time work - we actually do want to run it
2354 * now, we're shutting down so no imminent restart.
2355 */
2356 snd_soc_flush_all_delayed_work(card);
2357
2358 snd_soc_dapm_shutdown(card);
2359
2360 /* deactivate pins to sleep state */
2361 for_each_card_components(card, component)
2362 pinctrl_pm_select_sleep_state(component->dev);
2363
2364 return 0;
2365}
2366EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2367
2368const struct dev_pm_ops snd_soc_pm_ops = {
2369 .suspend = snd_soc_suspend,
2370 .resume = snd_soc_resume,
2371 .freeze = snd_soc_suspend,
2372 .thaw = snd_soc_resume,
2373 .poweroff = snd_soc_poweroff,
2374 .restore = snd_soc_resume,
2375};
2376EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2377
2378/* ASoC platform driver */
2379static struct platform_driver soc_driver = {
2380 .driver = {
2381 .name = "soc-audio",
2382 .pm = &snd_soc_pm_ops,
2383 },
2384 .probe = soc_probe,
2385};
2386
2387/**
2388 * snd_soc_cnew - create new control
2389 * @_template: control template
2390 * @data: control private data
2391 * @long_name: control long name
2392 * @prefix: control name prefix
2393 *
2394 * Create a new mixer control from a template control.
2395 *
2396 * Returns 0 for success, else error.
2397 */
2398struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2399 void *data, const char *long_name,
2400 const char *prefix)
2401{
2402 struct snd_kcontrol_new template;
2403 struct snd_kcontrol *kcontrol;
2404 char *name = NULL;
2405
2406 memcpy(&template, _template, sizeof(template));
2407 template.index = 0;
2408
2409 if (!long_name)
2410 long_name = template.name;
2411
2412 if (prefix) {
2413 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2414 if (!name)
2415 return NULL;
2416
2417 template.name = name;
2418 } else {
2419 template.name = long_name;
2420 }
2421
2422 kcontrol = snd_ctl_new1(&template, data);
2423
2424 kfree(name);
2425
2426 return kcontrol;
2427}
2428EXPORT_SYMBOL_GPL(snd_soc_cnew);
2429
2430static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2431 const struct snd_kcontrol_new *controls, int num_controls,
2432 const char *prefix, void *data)
2433{
2434 int i;
2435
2436 for (i = 0; i < num_controls; i++) {
2437 const struct snd_kcontrol_new *control = &controls[i];
2438 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2439 control->name, prefix));
2440 if (err < 0) {
2441 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2442 control->name, err);
2443 return err;
2444 }
2445 }
2446
2447 return 0;
2448}
2449
2450/**
2451 * snd_soc_add_component_controls - Add an array of controls to a component.
2452 *
2453 * @component: Component to add controls to
2454 * @controls: Array of controls to add
2455 * @num_controls: Number of elements in the array
2456 *
2457 * Return: 0 for success, else error.
2458 */
2459int snd_soc_add_component_controls(struct snd_soc_component *component,
2460 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2461{
2462 struct snd_card *card = component->card->snd_card;
2463
2464 return snd_soc_add_controls(card, component->dev, controls,
2465 num_controls, component->name_prefix, component);
2466}
2467EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2468
2469/**
2470 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2471 * Convenience function to add a list of controls.
2472 *
2473 * @soc_card: SoC card to add controls to
2474 * @controls: array of controls to add
2475 * @num_controls: number of elements in the array
2476 *
2477 * Return 0 for success, else error.
2478 */
2479int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2480 const struct snd_kcontrol_new *controls, int num_controls)
2481{
2482 struct snd_card *card = soc_card->snd_card;
2483
2484 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2485 NULL, soc_card);
2486}
2487EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2488
2489/**
2490 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2491 * Convenience function to add a list of controls.
2492 *
2493 * @dai: DAI to add controls to
2494 * @controls: array of controls to add
2495 * @num_controls: number of elements in the array
2496 *
2497 * Return 0 for success, else error.
2498 */
2499int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2500 const struct snd_kcontrol_new *controls, int num_controls)
2501{
2502 struct snd_card *card = dai->component->card->snd_card;
2503
2504 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2505 NULL, dai);
2506}
2507EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2508
2509/**
2510 * snd_soc_register_card - Register a card with the ASoC core
2511 *
2512 * @card: Card to register
2513 *
2514 */
2515int snd_soc_register_card(struct snd_soc_card *card)
2516{
2517 if (!card->name || !card->dev)
2518 return -EINVAL;
2519
2520 dev_set_drvdata(card->dev, card);
2521
2522 INIT_LIST_HEAD(&card->widgets);
2523 INIT_LIST_HEAD(&card->paths);
2524 INIT_LIST_HEAD(&card->dapm_list);
2525 INIT_LIST_HEAD(&card->aux_comp_list);
2526 INIT_LIST_HEAD(&card->component_dev_list);
2527 INIT_LIST_HEAD(&card->list);
2528 INIT_LIST_HEAD(&card->rtd_list);
2529 INIT_LIST_HEAD(&card->dapm_dirty);
2530 INIT_LIST_HEAD(&card->dobj_list);
2531
2532 card->instantiated = 0;
2533 mutex_init(&card->mutex);
2534 mutex_init(&card->dapm_mutex);
2535 mutex_init(&card->pcm_mutex);
2536
2537 return snd_soc_bind_card(card);
2538}
2539EXPORT_SYMBOL_GPL(snd_soc_register_card);
2540
2541/**
2542 * snd_soc_unregister_card - Unregister a card with the ASoC core
2543 *
2544 * @card: Card to unregister
2545 *
2546 */
2547void snd_soc_unregister_card(struct snd_soc_card *card)
2548{
2549 mutex_lock(&client_mutex);
2550 snd_soc_unbind_card(card, true);
2551 mutex_unlock(&client_mutex);
2552 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2553}
2554EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2555
2556/*
2557 * Simplify DAI link configuration by removing ".-1" from device names
2558 * and sanitizing names.
2559 */
2560static char *fmt_single_name(struct device *dev, int *id)
2561{
2562 const char *devname = dev_name(dev);
2563 char *found, *name;
2564 unsigned int id1, id2;
2565
2566 if (devname == NULL)
2567 return NULL;
2568
2569 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2570 if (!name)
2571 return NULL;
2572
2573 /* are we a "%s.%d" name (platform and SPI components) */
2574 found = strstr(name, dev->driver->name);
2575 if (found) {
2576 /* get ID */
2577 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2578
2579 /* discard ID from name if ID == -1 */
2580 if (*id == -1)
2581 found[strlen(dev->driver->name)] = '\0';
2582 }
2583
2584 /* I2C component devices are named "bus-addr" */
2585 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2586
2587 /* create unique ID number from I2C addr and bus */
2588 *id = ((id1 & 0xffff) << 16) + id2;
2589
2590 devm_kfree(dev, name);
2591
2592 /* sanitize component name for DAI link creation */
2593 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2594 } else {
2595 *id = 0;
2596 }
2597
2598 return name;
2599}
2600
2601/*
2602 * Simplify DAI link naming for single devices with multiple DAIs by removing
2603 * any ".-1" and using the DAI name (instead of device name).
2604 */
2605static inline char *fmt_multiple_name(struct device *dev,
2606 struct snd_soc_dai_driver *dai_drv)
2607{
2608 if (dai_drv->name == NULL) {
2609 dev_err(dev,
2610 "ASoC: error - multiple DAI %s registered with no name\n",
2611 dev_name(dev));
2612 return NULL;
2613 }
2614
2615 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2616}
2617
2618void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2619{
2620 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2621 list_del(&dai->list);
2622}
2623EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2624
2625/**
2626 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2627 *
2628 * @component: The component the DAIs are registered for
2629 * @dai_drv: DAI driver to use for the DAI
2630 * @legacy_dai_naming: if %true, use legacy single-name format;
2631 * if %false, use multiple-name format;
2632 *
2633 * Topology can use this API to register DAIs when probing a component.
2634 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2635 * will be freed in the component cleanup.
2636 */
2637struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2638 struct snd_soc_dai_driver *dai_drv,
2639 bool legacy_dai_naming)
2640{
2641 struct device *dev = component->dev;
2642 struct snd_soc_dai *dai;
2643
2644 lockdep_assert_held(&client_mutex);
2645
2646 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2647 if (dai == NULL)
2648 return NULL;
2649
2650 /*
2651 * Back in the old days when we still had component-less DAIs,
2652 * instead of having a static name, component-less DAIs would
2653 * inherit the name of the parent device so it is possible to
2654 * register multiple instances of the DAI. We still need to keep
2655 * the same naming style even though those DAIs are not
2656 * component-less anymore.
2657 */
2658 if (legacy_dai_naming &&
2659 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2660 dai->name = fmt_single_name(dev, &dai->id);
2661 } else {
2662 dai->name = fmt_multiple_name(dev, dai_drv);
2663 if (dai_drv->id)
2664 dai->id = dai_drv->id;
2665 else
2666 dai->id = component->num_dai;
2667 }
2668 if (!dai->name)
2669 return NULL;
2670
2671 dai->component = component;
2672 dai->dev = dev;
2673 dai->driver = dai_drv;
2674
2675 /* see for_each_component_dais */
2676 list_add_tail(&dai->list, &component->dai_list);
2677 component->num_dai++;
2678
2679 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2680 return dai;
2681}
2682EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2683
2684/**
2685 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2686 *
2687 * @component: The component for which the DAIs should be unregistered
2688 */
2689static void snd_soc_unregister_dais(struct snd_soc_component *component)
2690{
2691 struct snd_soc_dai *dai, *_dai;
2692
2693 for_each_component_dais_safe(component, dai, _dai)
2694 snd_soc_unregister_dai(dai);
2695}
2696
2697/**
2698 * snd_soc_register_dais - Register a DAI with the ASoC core
2699 *
2700 * @component: The component the DAIs are registered for
2701 * @dai_drv: DAI driver to use for the DAIs
2702 * @count: Number of DAIs
2703 */
2704static int snd_soc_register_dais(struct snd_soc_component *component,
2705 struct snd_soc_dai_driver *dai_drv,
2706 size_t count)
2707{
2708 struct snd_soc_dai *dai;
2709 unsigned int i;
2710 int ret;
2711
2712 for (i = 0; i < count; i++) {
2713 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2714 component->driver->legacy_dai_naming);
2715 if (dai == NULL) {
2716 ret = -ENOMEM;
2717 goto err;
2718 }
2719 }
2720
2721 return 0;
2722
2723err:
2724 snd_soc_unregister_dais(component);
2725
2726 return ret;
2727}
2728
2729#define ENDIANNESS_MAP(name) \
2730 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2731static u64 endianness_format_map[] = {
2732 ENDIANNESS_MAP(S16_),
2733 ENDIANNESS_MAP(U16_),
2734 ENDIANNESS_MAP(S24_),
2735 ENDIANNESS_MAP(U24_),
2736 ENDIANNESS_MAP(S32_),
2737 ENDIANNESS_MAP(U32_),
2738 ENDIANNESS_MAP(S24_3),
2739 ENDIANNESS_MAP(U24_3),
2740 ENDIANNESS_MAP(S20_3),
2741 ENDIANNESS_MAP(U20_3),
2742 ENDIANNESS_MAP(S18_3),
2743 ENDIANNESS_MAP(U18_3),
2744 ENDIANNESS_MAP(FLOAT_),
2745 ENDIANNESS_MAP(FLOAT64_),
2746 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2747};
2748
2749/*
2750 * Fix up the DAI formats for endianness: codecs don't actually see
2751 * the endianness of the data but we're using the CPU format
2752 * definitions which do need to include endianness so we ensure that
2753 * codec DAIs always have both big and little endian variants set.
2754 */
2755static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2756{
2757 int i;
2758
2759 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2760 if (stream->formats & endianness_format_map[i])
2761 stream->formats |= endianness_format_map[i];
2762}
2763
2764static void snd_soc_try_rebind_card(void)
2765{
2766 struct snd_soc_card *card, *c;
2767
2768 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2769 if (!snd_soc_bind_card(card))
2770 list_del(&card->list);
2771}
2772
2773static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2774{
2775 struct snd_soc_card *card = component->card;
2776
2777 snd_soc_unregister_dais(component);
2778
2779 if (card)
2780 snd_soc_unbind_card(card, false);
2781
2782 list_del(&component->list);
2783}
2784
2785int snd_soc_component_initialize(struct snd_soc_component *component,
2786 const struct snd_soc_component_driver *driver,
2787 struct device *dev)
2788{
2789 INIT_LIST_HEAD(&component->dai_list);
2790 INIT_LIST_HEAD(&component->dobj_list);
2791 INIT_LIST_HEAD(&component->card_list);
2792 INIT_LIST_HEAD(&component->list);
2793 mutex_init(&component->io_mutex);
2794
2795 component->name = fmt_single_name(dev, &component->id);
2796 if (!component->name) {
2797 dev_err(dev, "ASoC: Failed to allocate name\n");
2798 return -ENOMEM;
2799 }
2800
2801 component->dev = dev;
2802 component->driver = driver;
2803
2804#ifdef CONFIG_DEBUG_FS
2805 if (!component->debugfs_prefix)
2806 component->debugfs_prefix = driver->debugfs_prefix;
2807#endif
2808
2809 return 0;
2810}
2811EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2812
2813int snd_soc_add_component(struct snd_soc_component *component,
2814 struct snd_soc_dai_driver *dai_drv,
2815 int num_dai)
2816{
2817 int ret;
2818 int i;
2819
2820 mutex_lock(&client_mutex);
2821
2822 if (component->driver->endianness) {
2823 for (i = 0; i < num_dai; i++) {
2824 convert_endianness_formats(&dai_drv[i].playback);
2825 convert_endianness_formats(&dai_drv[i].capture);
2826 }
2827 }
2828
2829 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2830 if (ret < 0) {
2831 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2832 ret);
2833 goto err_cleanup;
2834 }
2835
2836 if (!component->driver->write && !component->driver->read) {
2837 if (!component->regmap)
2838 component->regmap = dev_get_regmap(component->dev,
2839 NULL);
2840 if (component->regmap)
2841 snd_soc_component_setup_regmap(component);
2842 }
2843
2844 /* see for_each_component */
2845 list_add(&component->list, &component_list);
2846
2847err_cleanup:
2848 if (ret < 0)
2849 snd_soc_del_component_unlocked(component);
2850
2851 mutex_unlock(&client_mutex);
2852
2853 if (ret == 0)
2854 snd_soc_try_rebind_card();
2855
2856 return ret;
2857}
2858EXPORT_SYMBOL_GPL(snd_soc_add_component);
2859
2860int snd_soc_register_component(struct device *dev,
2861 const struct snd_soc_component_driver *component_driver,
2862 struct snd_soc_dai_driver *dai_drv,
2863 int num_dai)
2864{
2865 struct snd_soc_component *component;
2866 int ret;
2867
2868 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2869 if (!component)
2870 return -ENOMEM;
2871
2872 ret = snd_soc_component_initialize(component, component_driver, dev);
2873 if (ret < 0)
2874 return ret;
2875
2876 return snd_soc_add_component(component, dai_drv, num_dai);
2877}
2878EXPORT_SYMBOL_GPL(snd_soc_register_component);
2879
2880/**
2881 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2882 * from the ASoC core
2883 *
2884 * @dev: The device to unregister
2885 * @component_driver: The component driver to unregister
2886 */
2887void snd_soc_unregister_component_by_driver(struct device *dev,
2888 const struct snd_soc_component_driver *component_driver)
2889{
2890 struct snd_soc_component *component;
2891
2892 if (!component_driver)
2893 return;
2894
2895 mutex_lock(&client_mutex);
2896 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2897 if (!component)
2898 goto out;
2899
2900 snd_soc_del_component_unlocked(component);
2901
2902out:
2903 mutex_unlock(&client_mutex);
2904}
2905EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2906
2907/**
2908 * snd_soc_unregister_component - Unregister all related component
2909 * from the ASoC core
2910 *
2911 * @dev: The device to unregister
2912 */
2913void snd_soc_unregister_component(struct device *dev)
2914{
2915 mutex_lock(&client_mutex);
2916 while (1) {
2917 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2918
2919 if (!component)
2920 break;
2921
2922 snd_soc_del_component_unlocked(component);
2923 }
2924 mutex_unlock(&client_mutex);
2925}
2926EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2927
2928/* Retrieve a card's name from device tree */
2929int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2930 const char *propname)
2931{
2932 struct device_node *np;
2933 int ret;
2934
2935 if (!card->dev) {
2936 pr_err("card->dev is not set before calling %s\n", __func__);
2937 return -EINVAL;
2938 }
2939
2940 np = card->dev->of_node;
2941
2942 ret = of_property_read_string_index(np, propname, 0, &card->name);
2943 /*
2944 * EINVAL means the property does not exist. This is fine providing
2945 * card->name was previously set, which is checked later in
2946 * snd_soc_register_card.
2947 */
2948 if (ret < 0 && ret != -EINVAL) {
2949 dev_err(card->dev,
2950 "ASoC: Property '%s' could not be read: %d\n",
2951 propname, ret);
2952 return ret;
2953 }
2954
2955 return 0;
2956}
2957EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2958
2959static const struct snd_soc_dapm_widget simple_widgets[] = {
2960 SND_SOC_DAPM_MIC("Microphone", NULL),
2961 SND_SOC_DAPM_LINE("Line", NULL),
2962 SND_SOC_DAPM_HP("Headphone", NULL),
2963 SND_SOC_DAPM_SPK("Speaker", NULL),
2964};
2965
2966int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2967 const char *propname)
2968{
2969 struct device_node *np = card->dev->of_node;
2970 struct snd_soc_dapm_widget *widgets;
2971 const char *template, *wname;
2972 int i, j, num_widgets;
2973
2974 num_widgets = of_property_count_strings(np, propname);
2975 if (num_widgets < 0) {
2976 dev_err(card->dev,
2977 "ASoC: Property '%s' does not exist\n", propname);
2978 return -EINVAL;
2979 }
2980 if (!num_widgets) {
2981 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2982 propname);
2983 return -EINVAL;
2984 }
2985 if (num_widgets & 1) {
2986 dev_err(card->dev,
2987 "ASoC: Property '%s' length is not even\n", propname);
2988 return -EINVAL;
2989 }
2990
2991 num_widgets /= 2;
2992
2993 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2994 GFP_KERNEL);
2995 if (!widgets) {
2996 dev_err(card->dev,
2997 "ASoC: Could not allocate memory for widgets\n");
2998 return -ENOMEM;
2999 }
3000
3001 for (i = 0; i < num_widgets; i++) {
3002 int ret = of_property_read_string_index(np, propname,
3003 2 * i, &template);
3004 if (ret) {
3005 dev_err(card->dev,
3006 "ASoC: Property '%s' index %d read error:%d\n",
3007 propname, 2 * i, ret);
3008 return -EINVAL;
3009 }
3010
3011 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3012 if (!strncmp(template, simple_widgets[j].name,
3013 strlen(simple_widgets[j].name))) {
3014 widgets[i] = simple_widgets[j];
3015 break;
3016 }
3017 }
3018
3019 if (j >= ARRAY_SIZE(simple_widgets)) {
3020 dev_err(card->dev,
3021 "ASoC: DAPM widget '%s' is not supported\n",
3022 template);
3023 return -EINVAL;
3024 }
3025
3026 ret = of_property_read_string_index(np, propname,
3027 (2 * i) + 1,
3028 &wname);
3029 if (ret) {
3030 dev_err(card->dev,
3031 "ASoC: Property '%s' index %d read error:%d\n",
3032 propname, (2 * i) + 1, ret);
3033 return -EINVAL;
3034 }
3035
3036 widgets[i].name = wname;
3037 }
3038
3039 card->of_dapm_widgets = widgets;
3040 card->num_of_dapm_widgets = num_widgets;
3041
3042 return 0;
3043}
3044EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3045
3046int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3047{
3048 const unsigned int nb_controls_max = 16;
3049 const char **strings, *control_name;
3050 struct snd_kcontrol_new *controls;
3051 struct device *dev = card->dev;
3052 unsigned int i, nb_controls;
3053 int ret;
3054
3055 if (!of_property_read_bool(dev->of_node, prop))
3056 return 0;
3057
3058 strings = devm_kcalloc(dev, nb_controls_max,
3059 sizeof(*strings), GFP_KERNEL);
3060 if (!strings)
3061 return -ENOMEM;
3062
3063 ret = of_property_read_string_array(dev->of_node, prop,
3064 strings, nb_controls_max);
3065 if (ret < 0)
3066 return ret;
3067
3068 nb_controls = (unsigned int)ret;
3069
3070 controls = devm_kcalloc(dev, nb_controls,
3071 sizeof(*controls), GFP_KERNEL);
3072 if (!controls)
3073 return -ENOMEM;
3074
3075 for (i = 0; i < nb_controls; i++) {
3076 control_name = devm_kasprintf(dev, GFP_KERNEL,
3077 "%s Switch", strings[i]);
3078 if (!control_name)
3079 return -ENOMEM;
3080
3081 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3082 controls[i].name = control_name;
3083 controls[i].info = snd_soc_dapm_info_pin_switch;
3084 controls[i].get = snd_soc_dapm_get_pin_switch;
3085 controls[i].put = snd_soc_dapm_put_pin_switch;
3086 controls[i].private_value = (unsigned long)strings[i];
3087 }
3088
3089 card->controls = controls;
3090 card->num_controls = nb_controls;
3091
3092 return 0;
3093}
3094EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3095
3096int snd_soc_of_get_slot_mask(struct device_node *np,
3097 const char *prop_name,
3098 unsigned int *mask)
3099{
3100 u32 val;
3101 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3102 int i;
3103
3104 if (!of_slot_mask)
3105 return 0;
3106 val /= sizeof(u32);
3107 for (i = 0; i < val; i++)
3108 if (be32_to_cpup(&of_slot_mask[i]))
3109 *mask |= (1 << i);
3110
3111 return val;
3112}
3113EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3114
3115int snd_soc_of_parse_tdm_slot(struct device_node *np,
3116 unsigned int *tx_mask,
3117 unsigned int *rx_mask,
3118 unsigned int *slots,
3119 unsigned int *slot_width)
3120{
3121 u32 val;
3122 int ret;
3123
3124 if (tx_mask)
3125 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3126 if (rx_mask)
3127 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3128
3129 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3130 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3131 if (ret)
3132 return ret;
3133
3134 if (slots)
3135 *slots = val;
3136 }
3137
3138 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3139 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3140 if (ret)
3141 return ret;
3142
3143 if (slot_width)
3144 *slot_width = val;
3145 }
3146
3147 return 0;
3148}
3149EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3150
3151void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3152 struct snd_soc_dai_link_component *cpus)
3153{
3154 platforms->of_node = cpus->of_node;
3155 platforms->dai_args = cpus->dai_args;
3156}
3157EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3158
3159void snd_soc_of_parse_node_prefix(struct device_node *np,
3160 struct snd_soc_codec_conf *codec_conf,
3161 struct device_node *of_node,
3162 const char *propname)
3163{
3164 const char *str;
3165 int ret;
3166
3167 ret = of_property_read_string(np, propname, &str);
3168 if (ret < 0) {
3169 /* no prefix is not error */
3170 return;
3171 }
3172
3173 codec_conf->dlc.of_node = of_node;
3174 codec_conf->name_prefix = str;
3175}
3176EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3177
3178int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3179 const char *propname)
3180{
3181 struct device_node *np = card->dev->of_node;
3182 int num_routes;
3183 struct snd_soc_dapm_route *routes;
3184 int i;
3185
3186 num_routes = of_property_count_strings(np, propname);
3187 if (num_routes < 0 || num_routes & 1) {
3188 dev_err(card->dev,
3189 "ASoC: Property '%s' does not exist or its length is not even\n",
3190 propname);
3191 return -EINVAL;
3192 }
3193 num_routes /= 2;
3194
3195 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3196 GFP_KERNEL);
3197 if (!routes) {
3198 dev_err(card->dev,
3199 "ASoC: Could not allocate DAPM route table\n");
3200 return -ENOMEM;
3201 }
3202
3203 for (i = 0; i < num_routes; i++) {
3204 int ret = of_property_read_string_index(np, propname,
3205 2 * i, &routes[i].sink);
3206 if (ret) {
3207 dev_err(card->dev,
3208 "ASoC: Property '%s' index %d could not be read: %d\n",
3209 propname, 2 * i, ret);
3210 return -EINVAL;
3211 }
3212 ret = of_property_read_string_index(np, propname,
3213 (2 * i) + 1, &routes[i].source);
3214 if (ret) {
3215 dev_err(card->dev,
3216 "ASoC: Property '%s' index %d could not be read: %d\n",
3217 propname, (2 * i) + 1, ret);
3218 return -EINVAL;
3219 }
3220 }
3221
3222 card->num_of_dapm_routes = num_routes;
3223 card->of_dapm_routes = routes;
3224
3225 return 0;
3226}
3227EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3228
3229int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3230{
3231 struct device_node *node = card->dev->of_node;
3232 struct snd_soc_aux_dev *aux;
3233 int num, i;
3234
3235 num = of_count_phandle_with_args(node, propname, NULL);
3236 if (num == -ENOENT) {
3237 return 0;
3238 } else if (num < 0) {
3239 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3240 propname, num);
3241 return num;
3242 }
3243
3244 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3245 if (!aux)
3246 return -ENOMEM;
3247 card->aux_dev = aux;
3248 card->num_aux_devs = num;
3249
3250 for_each_card_pre_auxs(card, i, aux) {
3251 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3252 if (!aux->dlc.of_node)
3253 return -EINVAL;
3254 }
3255
3256 return 0;
3257}
3258EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3259
3260unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3261{
3262 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3263
3264 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3265 case SND_SOC_DAIFMT_CBP_CFP:
3266 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3267 break;
3268 case SND_SOC_DAIFMT_CBP_CFC:
3269 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3270 break;
3271 case SND_SOC_DAIFMT_CBC_CFP:
3272 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3273 break;
3274 case SND_SOC_DAIFMT_CBC_CFC:
3275 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3276 break;
3277 }
3278
3279 return inv_dai_fmt;
3280}
3281EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3282
3283unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3284{
3285 /*
3286 * bit_frame is return value from
3287 * snd_soc_daifmt_parse_clock_provider_raw()
3288 */
3289
3290 /* Codec base */
3291 switch (bit_frame) {
3292 case 0x11:
3293 return SND_SOC_DAIFMT_CBP_CFP;
3294 case 0x10:
3295 return SND_SOC_DAIFMT_CBP_CFC;
3296 case 0x01:
3297 return SND_SOC_DAIFMT_CBC_CFP;
3298 default:
3299 return SND_SOC_DAIFMT_CBC_CFC;
3300 }
3301
3302 return 0;
3303}
3304EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3305
3306unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3307 const char *prefix)
3308{
3309 int ret;
3310 char prop[128];
3311 unsigned int format = 0;
3312 int bit, frame;
3313 const char *str;
3314 struct {
3315 char *name;
3316 unsigned int val;
3317 } of_fmt_table[] = {
3318 { "i2s", SND_SOC_DAIFMT_I2S },
3319 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3320 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3321 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3322 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3323 { "ac97", SND_SOC_DAIFMT_AC97 },
3324 { "pdm", SND_SOC_DAIFMT_PDM},
3325 { "msb", SND_SOC_DAIFMT_MSB },
3326 { "lsb", SND_SOC_DAIFMT_LSB },
3327 };
3328
3329 if (!prefix)
3330 prefix = "";
3331
3332 /*
3333 * check "dai-format = xxx"
3334 * or "[prefix]format = xxx"
3335 * SND_SOC_DAIFMT_FORMAT_MASK area
3336 */
3337 ret = of_property_read_string(np, "dai-format", &str);
3338 if (ret < 0) {
3339 snprintf(prop, sizeof(prop), "%sformat", prefix);
3340 ret = of_property_read_string(np, prop, &str);
3341 }
3342 if (ret == 0) {
3343 int i;
3344
3345 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3346 if (strcmp(str, of_fmt_table[i].name) == 0) {
3347 format |= of_fmt_table[i].val;
3348 break;
3349 }
3350 }
3351 }
3352
3353 /*
3354 * check "[prefix]continuous-clock"
3355 * SND_SOC_DAIFMT_CLOCK_MASK area
3356 */
3357 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3358 if (of_property_read_bool(np, prop))
3359 format |= SND_SOC_DAIFMT_CONT;
3360 else
3361 format |= SND_SOC_DAIFMT_GATED;
3362
3363 /*
3364 * check "[prefix]bitclock-inversion"
3365 * check "[prefix]frame-inversion"
3366 * SND_SOC_DAIFMT_INV_MASK area
3367 */
3368 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3369 bit = !!of_get_property(np, prop, NULL);
3370
3371 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3372 frame = !!of_get_property(np, prop, NULL);
3373
3374 switch ((bit << 4) + frame) {
3375 case 0x11:
3376 format |= SND_SOC_DAIFMT_IB_IF;
3377 break;
3378 case 0x10:
3379 format |= SND_SOC_DAIFMT_IB_NF;
3380 break;
3381 case 0x01:
3382 format |= SND_SOC_DAIFMT_NB_IF;
3383 break;
3384 default:
3385 /* SND_SOC_DAIFMT_NB_NF is default */
3386 break;
3387 }
3388
3389 return format;
3390}
3391EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3392
3393unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3394 const char *prefix,
3395 struct device_node **bitclkmaster,
3396 struct device_node **framemaster)
3397{
3398 char prop[128];
3399 unsigned int bit, frame;
3400
3401 if (!prefix)
3402 prefix = "";
3403
3404 /*
3405 * check "[prefix]bitclock-master"
3406 * check "[prefix]frame-master"
3407 */
3408 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3409 bit = !!of_get_property(np, prop, NULL);
3410 if (bit && bitclkmaster)
3411 *bitclkmaster = of_parse_phandle(np, prop, 0);
3412
3413 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3414 frame = !!of_get_property(np, prop, NULL);
3415 if (frame && framemaster)
3416 *framemaster = of_parse_phandle(np, prop, 0);
3417
3418 /*
3419 * return bitmap.
3420 * It will be parameter of
3421 * snd_soc_daifmt_clock_provider_from_bitmap()
3422 */
3423 return (bit << 4) + frame;
3424}
3425EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3426
3427int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3428{
3429 /*
3430 * [Normal]
3431 *
3432 * Playback
3433 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3434 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3435 *
3436 * Capture
3437 * CPU : SNDRV_PCM_STREAM_CAPTURE
3438 * Codec: SNDRV_PCM_STREAM_CAPTURE
3439 */
3440 if (!dai_link->c2c_params)
3441 return stream;
3442
3443 /*
3444 * [Codec2Codec]
3445 *
3446 * Playback
3447 * CPU : SNDRV_PCM_STREAM_CAPTURE
3448 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3449 *
3450 * Capture
3451 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3452 * Codec: SNDRV_PCM_STREAM_CAPTURE
3453 */
3454 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3455 return SNDRV_PCM_STREAM_PLAYBACK;
3456
3457 return SNDRV_PCM_STREAM_CAPTURE;
3458}
3459EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3460
3461int snd_soc_get_dai_id(struct device_node *ep)
3462{
3463 struct snd_soc_component *component;
3464 struct snd_soc_dai_link_component dlc = {
3465 .of_node = of_graph_get_port_parent(ep),
3466 };
3467 int ret;
3468
3469
3470 /*
3471 * For example HDMI case, HDMI has video/sound port,
3472 * but ALSA SoC needs sound port number only.
3473 * Thus counting HDMI DT port/endpoint doesn't work.
3474 * Then, it should have .of_xlate_dai_id
3475 */
3476 ret = -ENOTSUPP;
3477 mutex_lock(&client_mutex);
3478 component = soc_find_component(&dlc);
3479 if (component)
3480 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3481 mutex_unlock(&client_mutex);
3482
3483 of_node_put(dlc.of_node);
3484
3485 return ret;
3486}
3487EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3488
3489int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3490{
3491 struct snd_soc_component *pos;
3492 int ret = -EPROBE_DEFER;
3493
3494 mutex_lock(&client_mutex);
3495 for_each_component(pos) {
3496 struct device_node *component_of_node = soc_component_to_node(pos);
3497
3498 if (component_of_node != args->np || !pos->num_dai)
3499 continue;
3500
3501 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3502 if (ret == -ENOTSUPP) {
3503 struct snd_soc_dai *dai;
3504 int id = -1;
3505
3506 switch (args->args_count) {
3507 case 0:
3508 id = 0; /* same as dai_drv[0] */
3509 break;
3510 case 1:
3511 id = args->args[0];
3512 break;
3513 default:
3514 /* not supported */
3515 break;
3516 }
3517
3518 if (id < 0 || id >= pos->num_dai) {
3519 ret = -EINVAL;
3520 continue;
3521 }
3522
3523 ret = 0;
3524
3525 /* find target DAI */
3526 for_each_component_dais(pos, dai) {
3527 if (id == 0)
3528 break;
3529 id--;
3530 }
3531
3532 dlc->dai_name = snd_soc_dai_name_get(dai);
3533 } else if (ret) {
3534 /*
3535 * if another error than ENOTSUPP is returned go on and
3536 * check if another component is provided with the same
3537 * node. This may happen if a device provides several
3538 * components
3539 */
3540 continue;
3541 }
3542
3543 break;
3544 }
3545
3546 if (ret == 0)
3547 dlc->of_node = args->np;
3548
3549 mutex_unlock(&client_mutex);
3550 return ret;
3551}
3552EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3553
3554int snd_soc_of_get_dlc(struct device_node *of_node,
3555 struct of_phandle_args *args,
3556 struct snd_soc_dai_link_component *dlc,
3557 int index)
3558{
3559 struct of_phandle_args __args;
3560 int ret;
3561
3562 if (!args)
3563 args = &__args;
3564
3565 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3566 "#sound-dai-cells", index, args);
3567 if (ret)
3568 return ret;
3569
3570 return snd_soc_get_dlc(args, dlc);
3571}
3572EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3573
3574int snd_soc_get_dai_name(const struct of_phandle_args *args,
3575 const char **dai_name)
3576{
3577 struct snd_soc_dai_link_component dlc;
3578 int ret = snd_soc_get_dlc(args, &dlc);
3579
3580 if (ret == 0)
3581 *dai_name = dlc.dai_name;
3582
3583 return ret;
3584}
3585EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3586
3587int snd_soc_of_get_dai_name(struct device_node *of_node,
3588 const char **dai_name, int index)
3589{
3590 struct snd_soc_dai_link_component dlc;
3591 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3592
3593 if (ret == 0)
3594 *dai_name = dlc.dai_name;
3595
3596 return ret;
3597}
3598EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3599
3600struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args)
3601{
3602 struct snd_soc_dai *dai;
3603 struct snd_soc_component *component;
3604
3605 mutex_lock(&client_mutex);
3606 for_each_component(component) {
3607 for_each_component_dais(component, dai)
3608 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3609 goto found;
3610 }
3611 dai = NULL;
3612found:
3613 mutex_unlock(&client_mutex);
3614 return dai;
3615}
3616EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3617
3618static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3619{
3620 if (component->of_node) {
3621 of_node_put(component->of_node);
3622 component->of_node = NULL;
3623 }
3624}
3625
3626static int __snd_soc_of_get_dai_link_component_alloc(
3627 struct device *dev, struct device_node *of_node,
3628 struct snd_soc_dai_link_component **ret_component,
3629 int *ret_num)
3630{
3631 struct snd_soc_dai_link_component *component;
3632 int num;
3633
3634 /* Count the number of CPUs/CODECs */
3635 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3636 if (num <= 0) {
3637 if (num == -ENOENT)
3638 dev_err(dev, "No 'sound-dai' property\n");
3639 else
3640 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3641 return num;
3642 }
3643 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3644 if (!component)
3645 return -ENOMEM;
3646
3647 *ret_component = component;
3648 *ret_num = num;
3649
3650 return 0;
3651}
3652
3653/*
3654 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3655 * @dai_link: DAI link
3656 *
3657 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3658 */
3659void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3660{
3661 struct snd_soc_dai_link_component *component;
3662 int index;
3663
3664 for_each_link_codecs(dai_link, index, component)
3665 __snd_soc_of_put_component(component);
3666}
3667EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3668
3669/*
3670 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3671 * @dev: Card device
3672 * @of_node: Device node
3673 * @dai_link: DAI link
3674 *
3675 * Builds an array of CODEC DAI components from the DAI link property
3676 * 'sound-dai'.
3677 * The array is set in the DAI link and the number of DAIs is set accordingly.
3678 * The device nodes in the array (of_node) must be dereferenced by calling
3679 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3680 *
3681 * Returns 0 for success
3682 */
3683int snd_soc_of_get_dai_link_codecs(struct device *dev,
3684 struct device_node *of_node,
3685 struct snd_soc_dai_link *dai_link)
3686{
3687 struct snd_soc_dai_link_component *component;
3688 int index, ret;
3689
3690 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3691 &dai_link->codecs, &dai_link->num_codecs);
3692 if (ret < 0)
3693 return ret;
3694
3695 /* Parse the list */
3696 for_each_link_codecs(dai_link, index, component) {
3697 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3698 if (ret)
3699 goto err;
3700 }
3701 return 0;
3702err:
3703 snd_soc_of_put_dai_link_codecs(dai_link);
3704 dai_link->codecs = NULL;
3705 dai_link->num_codecs = 0;
3706 return ret;
3707}
3708EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3709
3710/*
3711 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3712 * @dai_link: DAI link
3713 *
3714 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3715 */
3716void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3717{
3718 struct snd_soc_dai_link_component *component;
3719 int index;
3720
3721 for_each_link_cpus(dai_link, index, component)
3722 __snd_soc_of_put_component(component);
3723}
3724EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3725
3726/*
3727 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3728 * @dev: Card device
3729 * @of_node: Device node
3730 * @dai_link: DAI link
3731 *
3732 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3733 * instead.
3734 *
3735 * Returns 0 for success
3736 */
3737int snd_soc_of_get_dai_link_cpus(struct device *dev,
3738 struct device_node *of_node,
3739 struct snd_soc_dai_link *dai_link)
3740{
3741 struct snd_soc_dai_link_component *component;
3742 int index, ret;
3743
3744 /* Count the number of CPUs */
3745 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3746 &dai_link->cpus, &dai_link->num_cpus);
3747 if (ret < 0)
3748 return ret;
3749
3750 /* Parse the list */
3751 for_each_link_cpus(dai_link, index, component) {
3752 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3753 if (ret)
3754 goto err;
3755 }
3756 return 0;
3757err:
3758 snd_soc_of_put_dai_link_cpus(dai_link);
3759 dai_link->cpus = NULL;
3760 dai_link->num_cpus = 0;
3761 return ret;
3762}
3763EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3764
3765static int __init snd_soc_init(void)
3766{
3767 int ret;
3768
3769 snd_soc_debugfs_init();
3770 ret = snd_soc_util_init();
3771 if (ret)
3772 goto err_util_init;
3773
3774 ret = platform_driver_register(&soc_driver);
3775 if (ret)
3776 goto err_register;
3777 return 0;
3778
3779err_register:
3780 snd_soc_util_exit();
3781err_util_init:
3782 snd_soc_debugfs_exit();
3783 return ret;
3784}
3785module_init(snd_soc_init);
3786
3787static void __exit snd_soc_exit(void)
3788{
3789 snd_soc_util_exit();
3790 snd_soc_debugfs_exit();
3791
3792 platform_driver_unregister(&soc_driver);
3793}
3794module_exit(snd_soc_exit);
3795
3796/* Module information */
3797MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3798MODULE_DESCRIPTION("ALSA SoC Core");
3799MODULE_LICENSE("GPL");
3800MODULE_ALIAS("platform:soc-audio");