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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 <sound/core.h>
35#include <sound/jack.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/initval.h>
42
43#define CREATE_TRACE_POINTS
44#include <trace/events/asoc.h>
45
46#define NAME_SIZE 32
47
48#ifdef CONFIG_DEBUG_FS
49struct dentry *snd_soc_debugfs_root;
50EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
51#endif
52
53static DEFINE_MUTEX(client_mutex);
54static LIST_HEAD(component_list);
55static LIST_HEAD(unbind_card_list);
56
57#define for_each_component(component) \
58 list_for_each_entry(component, &component_list, list)
59
60/*
61 * This is used if driver don't need to have CPU/Codec/Platform
62 * dai_link. see soc.h
63 */
64struct snd_soc_dai_link_component null_dailink_component[0];
65EXPORT_SYMBOL_GPL(null_dailink_component);
66
67/*
68 * This is a timeout to do a DAPM powerdown after a stream is closed().
69 * It can be used to eliminate pops between different playback streams, e.g.
70 * between two audio tracks.
71 */
72static int pmdown_time = 5000;
73module_param(pmdown_time, int, 0);
74MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
75
76#ifdef CONFIG_DMI
77/*
78 * If a DMI filed contain strings in this blacklist (e.g.
79 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
80 * as invalid and dropped when setting the card long name from DMI info.
81 */
82static const char * const dmi_blacklist[] = {
83 "To be filled by OEM",
84 "TBD by OEM",
85 "Default String",
86 "Board Manufacturer",
87 "Board Vendor Name",
88 "Board Product Name",
89 NULL, /* terminator */
90};
91#endif
92
93static ssize_t pmdown_time_show(struct device *dev,
94 struct device_attribute *attr, char *buf)
95{
96 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
97
98 return sprintf(buf, "%ld\n", rtd->pmdown_time);
99}
100
101static ssize_t pmdown_time_set(struct device *dev,
102 struct device_attribute *attr,
103 const char *buf, size_t count)
104{
105 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
106 int ret;
107
108 ret = kstrtol(buf, 10, &rtd->pmdown_time);
109 if (ret)
110 return ret;
111
112 return count;
113}
114
115static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
116
117static struct attribute *soc_dev_attrs[] = {
118 &dev_attr_pmdown_time.attr,
119 NULL
120};
121
122static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
123 struct attribute *attr, int idx)
124{
125 struct device *dev = kobj_to_dev(kobj);
126 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
127
128 if (attr == &dev_attr_pmdown_time.attr)
129 return attr->mode; /* always visible */
130 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
131}
132
133static const struct attribute_group soc_dapm_dev_group = {
134 .attrs = soc_dapm_dev_attrs,
135 .is_visible = soc_dev_attr_is_visible,
136};
137
138static const struct attribute_group soc_dev_group = {
139 .attrs = soc_dev_attrs,
140 .is_visible = soc_dev_attr_is_visible,
141};
142
143static const struct attribute_group *soc_dev_attr_groups[] = {
144 &soc_dapm_dev_group,
145 &soc_dev_group,
146 NULL
147};
148
149#ifdef CONFIG_DEBUG_FS
150static void soc_init_component_debugfs(struct snd_soc_component *component)
151{
152 if (!component->card->debugfs_card_root)
153 return;
154
155 if (component->debugfs_prefix) {
156 char *name;
157
158 name = kasprintf(GFP_KERNEL, "%s:%s",
159 component->debugfs_prefix, component->name);
160 if (name) {
161 component->debugfs_root = debugfs_create_dir(name,
162 component->card->debugfs_card_root);
163 kfree(name);
164 }
165 } else {
166 component->debugfs_root = debugfs_create_dir(component->name,
167 component->card->debugfs_card_root);
168 }
169
170 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
171 component->debugfs_root);
172}
173
174static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
175{
176 if (!component->debugfs_root)
177 return;
178 debugfs_remove_recursive(component->debugfs_root);
179 component->debugfs_root = NULL;
180}
181
182static int dai_list_show(struct seq_file *m, void *v)
183{
184 struct snd_soc_component *component;
185 struct snd_soc_dai *dai;
186
187 mutex_lock(&client_mutex);
188
189 for_each_component(component)
190 for_each_component_dais(component, dai)
191 seq_printf(m, "%s\n", dai->name);
192
193 mutex_unlock(&client_mutex);
194
195 return 0;
196}
197DEFINE_SHOW_ATTRIBUTE(dai_list);
198
199static int component_list_show(struct seq_file *m, void *v)
200{
201 struct snd_soc_component *component;
202
203 mutex_lock(&client_mutex);
204
205 for_each_component(component)
206 seq_printf(m, "%s\n", component->name);
207
208 mutex_unlock(&client_mutex);
209
210 return 0;
211}
212DEFINE_SHOW_ATTRIBUTE(component_list);
213
214static void soc_init_card_debugfs(struct snd_soc_card *card)
215{
216 card->debugfs_card_root = debugfs_create_dir(card->name,
217 snd_soc_debugfs_root);
218
219 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
220 &card->pop_time);
221
222 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
223}
224
225static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
226{
227 debugfs_remove_recursive(card->debugfs_card_root);
228 card->debugfs_card_root = NULL;
229}
230
231static void snd_soc_debugfs_init(void)
232{
233 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
234
235 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
236 &dai_list_fops);
237
238 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
239 &component_list_fops);
240}
241
242static void snd_soc_debugfs_exit(void)
243{
244 debugfs_remove_recursive(snd_soc_debugfs_root);
245}
246
247#else
248
249static inline void soc_init_component_debugfs(
250 struct snd_soc_component *component)
251{
252}
253
254static inline void soc_cleanup_component_debugfs(
255 struct snd_soc_component *component)
256{
257}
258
259static inline void soc_init_card_debugfs(struct snd_soc_card *card)
260{
261}
262
263static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
264{
265}
266
267static inline void snd_soc_debugfs_init(void)
268{
269}
270
271static inline void snd_soc_debugfs_exit(void)
272{
273}
274
275#endif
276
277static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
278 struct snd_soc_component *component)
279{
280 struct snd_soc_rtdcom_list *rtdcom;
281
282 for_each_rtdcom(rtd, rtdcom) {
283 /* already connected */
284 if (rtdcom->component == component)
285 return 0;
286 }
287
288 rtdcom = kmalloc(sizeof(*rtdcom), GFP_KERNEL);
289 if (!rtdcom)
290 return -ENOMEM;
291
292 rtdcom->component = component;
293 INIT_LIST_HEAD(&rtdcom->list);
294
295 list_add_tail(&rtdcom->list, &rtd->component_list);
296
297 return 0;
298}
299
300static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
301{
302 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
303
304 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
305 kfree(rtdcom1);
306
307 INIT_LIST_HEAD(&rtd->component_list);
308}
309
310struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
311 const char *driver_name)
312{
313 struct snd_soc_rtdcom_list *rtdcom;
314
315 if (!driver_name)
316 return NULL;
317
318 /*
319 * NOTE
320 *
321 * snd_soc_rtdcom_lookup() will find component from rtd by using
322 * specified driver name.
323 * But, if many components which have same driver name are connected
324 * to 1 rtd, this function will return 1st found component.
325 */
326 for_each_rtdcom(rtd, rtdcom) {
327 const char *component_name = rtdcom->component->driver->name;
328
329 if (!component_name)
330 continue;
331
332 if ((component_name == driver_name) ||
333 strcmp(component_name, driver_name) == 0)
334 return rtdcom->component;
335 }
336
337 return NULL;
338}
339EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
340
341struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
342 const char *dai_link, int stream)
343{
344 struct snd_soc_pcm_runtime *rtd;
345
346 for_each_card_rtds(card, rtd) {
347 if (rtd->dai_link->no_pcm &&
348 !strcmp(rtd->dai_link->name, dai_link))
349 return rtd->pcm->streams[stream].substream;
350 }
351 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
352 return NULL;
353}
354EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
355
356static const struct snd_soc_ops null_snd_soc_ops;
357
358static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
359 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
360{
361 struct snd_soc_pcm_runtime *rtd;
362
363 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
364 if (!rtd)
365 return NULL;
366
367 INIT_LIST_HEAD(&rtd->component_list);
368 rtd->card = card;
369 rtd->dai_link = dai_link;
370 if (!rtd->dai_link->ops)
371 rtd->dai_link->ops = &null_snd_soc_ops;
372
373 rtd->codec_dais = kcalloc(dai_link->num_codecs,
374 sizeof(struct snd_soc_dai *),
375 GFP_KERNEL);
376 if (!rtd->codec_dais) {
377 kfree(rtd);
378 return NULL;
379 }
380
381 return rtd;
382}
383
384static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
385{
386 kfree(rtd->codec_dais);
387 snd_soc_rtdcom_del_all(rtd);
388 kfree(rtd);
389}
390
391static void soc_add_pcm_runtime(struct snd_soc_card *card,
392 struct snd_soc_pcm_runtime *rtd)
393{
394 /* see for_each_card_rtds */
395 list_add_tail(&rtd->list, &card->rtd_list);
396 rtd->num = card->num_rtd;
397 card->num_rtd++;
398}
399
400static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
401{
402 struct snd_soc_pcm_runtime *rtd, *_rtd;
403
404 for_each_card_rtds_safe(card, rtd, _rtd) {
405 list_del(&rtd->list);
406 soc_free_pcm_runtime(rtd);
407 }
408
409 card->num_rtd = 0;
410}
411
412struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
413 const char *dai_link)
414{
415 struct snd_soc_pcm_runtime *rtd;
416
417 for_each_card_rtds(card, rtd) {
418 if (!strcmp(rtd->dai_link->name, dai_link))
419 return rtd;
420 }
421 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
422 return NULL;
423}
424EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
425
426static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
427{
428 struct snd_soc_pcm_runtime *rtd;
429
430 for_each_card_rtds(card, rtd)
431 flush_delayed_work(&rtd->delayed_work);
432}
433
434#ifdef CONFIG_PM_SLEEP
435/* powers down audio subsystem for suspend */
436int snd_soc_suspend(struct device *dev)
437{
438 struct snd_soc_card *card = dev_get_drvdata(dev);
439 struct snd_soc_component *component;
440 struct snd_soc_pcm_runtime *rtd;
441 int i;
442
443 /* If the card is not initialized yet there is nothing to do */
444 if (!card->instantiated)
445 return 0;
446
447 /*
448 * Due to the resume being scheduled into a workqueue we could
449 * suspend before that's finished - wait for it to complete.
450 */
451 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
452
453 /* we're going to block userspace touching us until resume completes */
454 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
455
456 /* mute any active DACs */
457 for_each_card_rtds(card, rtd) {
458 struct snd_soc_dai *dai;
459
460 if (rtd->dai_link->ignore_suspend)
461 continue;
462
463 for_each_rtd_codec_dai(rtd, i, dai) {
464 if (dai->playback_active)
465 snd_soc_dai_digital_mute(dai, 1,
466 SNDRV_PCM_STREAM_PLAYBACK);
467 }
468 }
469
470 /* suspend all pcms */
471 for_each_card_rtds(card, rtd) {
472 if (rtd->dai_link->ignore_suspend)
473 continue;
474
475 snd_pcm_suspend_all(rtd->pcm);
476 }
477
478 if (card->suspend_pre)
479 card->suspend_pre(card);
480
481 for_each_card_rtds(card, rtd) {
482 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
483
484 if (rtd->dai_link->ignore_suspend)
485 continue;
486
487 if (!cpu_dai->driver->bus_control)
488 snd_soc_dai_suspend(cpu_dai);
489 }
490
491 /* close any waiting streams */
492 snd_soc_flush_all_delayed_work(card);
493
494 for_each_card_rtds(card, rtd) {
495
496 if (rtd->dai_link->ignore_suspend)
497 continue;
498
499 snd_soc_dapm_stream_event(rtd,
500 SNDRV_PCM_STREAM_PLAYBACK,
501 SND_SOC_DAPM_STREAM_SUSPEND);
502
503 snd_soc_dapm_stream_event(rtd,
504 SNDRV_PCM_STREAM_CAPTURE,
505 SND_SOC_DAPM_STREAM_SUSPEND);
506 }
507
508 /* Recheck all endpoints too, their state is affected by suspend */
509 dapm_mark_endpoints_dirty(card);
510 snd_soc_dapm_sync(&card->dapm);
511
512 /* suspend all COMPONENTs */
513 for_each_card_components(card, component) {
514 struct snd_soc_dapm_context *dapm =
515 snd_soc_component_get_dapm(component);
516
517 /*
518 * If there are paths active then the COMPONENT will be held
519 * with bias _ON and should not be suspended.
520 */
521 if (!snd_soc_component_is_suspended(component)) {
522 switch (snd_soc_dapm_get_bias_level(dapm)) {
523 case SND_SOC_BIAS_STANDBY:
524 /*
525 * If the COMPONENT is capable of idle
526 * bias off then being in STANDBY
527 * means it's doing something,
528 * otherwise fall through.
529 */
530 if (dapm->idle_bias_off) {
531 dev_dbg(component->dev,
532 "ASoC: idle_bias_off CODEC on over suspend\n");
533 break;
534 }
535 /* fall through */
536
537 case SND_SOC_BIAS_OFF:
538 snd_soc_component_suspend(component);
539 if (component->regmap)
540 regcache_mark_dirty(component->regmap);
541 /* deactivate pins to sleep state */
542 pinctrl_pm_select_sleep_state(component->dev);
543 break;
544 default:
545 dev_dbg(component->dev,
546 "ASoC: COMPONENT is on over suspend\n");
547 break;
548 }
549 }
550 }
551
552 for_each_card_rtds(card, rtd) {
553 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
554
555 if (rtd->dai_link->ignore_suspend)
556 continue;
557
558 if (cpu_dai->driver->bus_control)
559 snd_soc_dai_suspend(cpu_dai);
560
561 /* deactivate pins to sleep state */
562 pinctrl_pm_select_sleep_state(cpu_dai->dev);
563 }
564
565 if (card->suspend_post)
566 card->suspend_post(card);
567
568 return 0;
569}
570EXPORT_SYMBOL_GPL(snd_soc_suspend);
571
572/*
573 * deferred resume work, so resume can complete before we finished
574 * setting our codec back up, which can be very slow on I2C
575 */
576static void soc_resume_deferred(struct work_struct *work)
577{
578 struct snd_soc_card *card =
579 container_of(work, struct snd_soc_card,
580 deferred_resume_work);
581 struct snd_soc_pcm_runtime *rtd;
582 struct snd_soc_component *component;
583 int i;
584
585 /*
586 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
587 * so userspace apps are blocked from touching us
588 */
589
590 dev_dbg(card->dev, "ASoC: starting resume work\n");
591
592 /* Bring us up into D2 so that DAPM starts enabling things */
593 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
594
595 if (card->resume_pre)
596 card->resume_pre(card);
597
598 /* resume control bus DAIs */
599 for_each_card_rtds(card, rtd) {
600 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
601
602 if (rtd->dai_link->ignore_suspend)
603 continue;
604
605 if (cpu_dai->driver->bus_control)
606 snd_soc_dai_resume(cpu_dai);
607 }
608
609 for_each_card_components(card, component) {
610 if (snd_soc_component_is_suspended(component))
611 snd_soc_component_resume(component);
612 }
613
614 for_each_card_rtds(card, rtd) {
615
616 if (rtd->dai_link->ignore_suspend)
617 continue;
618
619 snd_soc_dapm_stream_event(rtd,
620 SNDRV_PCM_STREAM_PLAYBACK,
621 SND_SOC_DAPM_STREAM_RESUME);
622
623 snd_soc_dapm_stream_event(rtd,
624 SNDRV_PCM_STREAM_CAPTURE,
625 SND_SOC_DAPM_STREAM_RESUME);
626 }
627
628 /* unmute any active DACs */
629 for_each_card_rtds(card, rtd) {
630 struct snd_soc_dai *dai;
631
632 if (rtd->dai_link->ignore_suspend)
633 continue;
634
635 for_each_rtd_codec_dai(rtd, i, dai) {
636 if (dai->playback_active)
637 snd_soc_dai_digital_mute(dai, 0,
638 SNDRV_PCM_STREAM_PLAYBACK);
639 }
640 }
641
642 for_each_card_rtds(card, rtd) {
643 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
644
645 if (rtd->dai_link->ignore_suspend)
646 continue;
647
648 if (!cpu_dai->driver->bus_control)
649 snd_soc_dai_resume(cpu_dai);
650 }
651
652 if (card->resume_post)
653 card->resume_post(card);
654
655 dev_dbg(card->dev, "ASoC: resume work completed\n");
656
657 /* Recheck all endpoints too, their state is affected by suspend */
658 dapm_mark_endpoints_dirty(card);
659 snd_soc_dapm_sync(&card->dapm);
660
661 /* userspace can access us now we are back as we were before */
662 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
663}
664
665/* powers up audio subsystem after a suspend */
666int snd_soc_resume(struct device *dev)
667{
668 struct snd_soc_card *card = dev_get_drvdata(dev);
669 bool bus_control = false;
670 struct snd_soc_pcm_runtime *rtd;
671 struct snd_soc_dai *codec_dai;
672 int i;
673
674 /* If the card is not initialized yet there is nothing to do */
675 if (!card->instantiated)
676 return 0;
677
678 /* activate pins from sleep state */
679 for_each_card_rtds(card, rtd) {
680 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
681
682 if (cpu_dai->active)
683 pinctrl_pm_select_default_state(cpu_dai->dev);
684
685 for_each_rtd_codec_dai(rtd, i, codec_dai) {
686 if (codec_dai->active)
687 pinctrl_pm_select_default_state(codec_dai->dev);
688 }
689 }
690
691 /*
692 * DAIs that also act as the control bus master might have other drivers
693 * hanging off them so need to resume immediately. Other drivers don't
694 * have that problem and may take a substantial amount of time to resume
695 * due to I/O costs and anti-pop so handle them out of line.
696 */
697 for_each_card_rtds(card, rtd) {
698 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
699
700 bus_control |= cpu_dai->driver->bus_control;
701 }
702 if (bus_control) {
703 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
704 soc_resume_deferred(&card->deferred_resume_work);
705 } else {
706 dev_dbg(dev, "ASoC: Scheduling resume work\n");
707 if (!schedule_work(&card->deferred_resume_work))
708 dev_err(dev, "ASoC: resume work item may be lost\n");
709 }
710
711 return 0;
712}
713EXPORT_SYMBOL_GPL(snd_soc_resume);
714
715static void soc_resume_init(struct snd_soc_card *card)
716{
717 /* deferred resume work */
718 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
719}
720#else
721#define snd_soc_suspend NULL
722#define snd_soc_resume NULL
723static inline void soc_resume_init(struct snd_soc_card *card)
724{
725}
726#endif
727
728static const struct snd_soc_dai_ops null_dai_ops = {
729};
730
731static struct device_node
732*soc_component_to_node(struct snd_soc_component *component)
733{
734 struct device_node *of_node;
735
736 of_node = component->dev->of_node;
737 if (!of_node && component->dev->parent)
738 of_node = component->dev->parent->of_node;
739
740 return of_node;
741}
742
743static int snd_soc_is_matching_component(
744 const struct snd_soc_dai_link_component *dlc,
745 struct snd_soc_component *component)
746{
747 struct device_node *component_of_node;
748
749 if (!dlc)
750 return 0;
751
752 component_of_node = soc_component_to_node(component);
753
754 if (dlc->of_node && component_of_node != dlc->of_node)
755 return 0;
756 if (dlc->name && strcmp(component->name, dlc->name))
757 return 0;
758
759 return 1;
760}
761
762static struct snd_soc_component *soc_find_component(
763 const struct snd_soc_dai_link_component *dlc)
764{
765 struct snd_soc_component *component;
766
767 lockdep_assert_held(&client_mutex);
768
769 /*
770 * NOTE
771 *
772 * It returns *1st* found component, but some driver
773 * has few components by same of_node/name
774 * ex)
775 * CPU component and generic DMAEngine component
776 */
777 for_each_component(component)
778 if (snd_soc_is_matching_component(dlc, component))
779 return component;
780
781 return NULL;
782}
783
784/**
785 * snd_soc_find_dai - Find a registered DAI
786 *
787 * @dlc: name of the DAI or the DAI driver and optional component info to match
788 *
789 * This function will search all registered components and their DAIs to
790 * find the DAI of the same name. The component's of_node and name
791 * should also match if being specified.
792 *
793 * Return: pointer of DAI, or NULL if not found.
794 */
795struct snd_soc_dai *snd_soc_find_dai(
796 const struct snd_soc_dai_link_component *dlc)
797{
798 struct snd_soc_component *component;
799 struct snd_soc_dai *dai;
800
801 lockdep_assert_held(&client_mutex);
802
803 /* Find CPU DAI from registered DAIs */
804 for_each_component(component) {
805 if (!snd_soc_is_matching_component(dlc, component))
806 continue;
807 for_each_component_dais(component, dai) {
808 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
809 && (!dai->driver->name
810 || strcmp(dai->driver->name, dlc->dai_name)))
811 continue;
812
813 return dai;
814 }
815 }
816
817 return NULL;
818}
819EXPORT_SYMBOL_GPL(snd_soc_find_dai);
820
821/**
822 * snd_soc_find_dai_link - Find a DAI link
823 *
824 * @card: soc card
825 * @id: DAI link ID to match
826 * @name: DAI link name to match, optional
827 * @stream_name: DAI link stream name to match, optional
828 *
829 * This function will search all existing DAI links of the soc card to
830 * find the link of the same ID. Since DAI links may not have their
831 * unique ID, so name and stream name should also match if being
832 * specified.
833 *
834 * Return: pointer of DAI link, or NULL if not found.
835 */
836struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
837 int id, const char *name,
838 const char *stream_name)
839{
840 struct snd_soc_dai_link *link;
841
842 lockdep_assert_held(&client_mutex);
843
844 for_each_card_links(card, link) {
845 if (link->id != id)
846 continue;
847
848 if (name && (!link->name || strcmp(name, link->name)))
849 continue;
850
851 if (stream_name && (!link->stream_name
852 || strcmp(stream_name, link->stream_name)))
853 continue;
854
855 return link;
856 }
857
858 return NULL;
859}
860EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
861
862static bool soc_is_dai_link_bound(struct snd_soc_card *card,
863 struct snd_soc_dai_link *dai_link)
864{
865 struct snd_soc_pcm_runtime *rtd;
866
867 for_each_card_rtds(card, rtd) {
868 if (rtd->dai_link == dai_link)
869 return true;
870 }
871
872 return false;
873}
874
875static int soc_bind_dai_link(struct snd_soc_card *card,
876 struct snd_soc_dai_link *dai_link)
877{
878 struct snd_soc_pcm_runtime *rtd;
879 struct snd_soc_dai_link_component *codec, *platform;
880 struct snd_soc_component *component;
881 int i;
882
883 if (dai_link->ignore)
884 return 0;
885
886 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
887
888 if (soc_is_dai_link_bound(card, dai_link)) {
889 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
890 dai_link->name);
891 return 0;
892 }
893
894 rtd = soc_new_pcm_runtime(card, dai_link);
895 if (!rtd)
896 return -ENOMEM;
897
898 /* FIXME: we need multi CPU support in the future */
899 rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
900 if (!rtd->cpu_dai) {
901 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
902 dai_link->cpus->dai_name);
903 goto _err_defer;
904 }
905 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
906
907 /* Find CODEC from registered CODECs */
908 rtd->num_codecs = dai_link->num_codecs;
909 for_each_link_codecs(dai_link, i, codec) {
910 rtd->codec_dais[i] = snd_soc_find_dai(codec);
911 if (!rtd->codec_dais[i]) {
912 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
913 codec->dai_name);
914 goto _err_defer;
915 }
916
917 snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
918 }
919
920 /* Single codec links expect codec and codec_dai in runtime data */
921 rtd->codec_dai = rtd->codec_dais[0];
922
923 /* Find PLATFORM from registered PLATFORMs */
924 for_each_link_platforms(dai_link, i, platform) {
925 for_each_component(component) {
926 if (!snd_soc_is_matching_component(platform, component))
927 continue;
928
929 snd_soc_rtdcom_add(rtd, component);
930 }
931 }
932
933 soc_add_pcm_runtime(card, rtd);
934 return 0;
935
936_err_defer:
937 soc_free_pcm_runtime(rtd);
938 return -EPROBE_DEFER;
939}
940
941static void soc_set_of_name_prefix(struct snd_soc_component *component)
942{
943 struct device_node *of_node = soc_component_to_node(component);
944 const char *str;
945 int ret;
946
947 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
948 if (!ret)
949 component->name_prefix = str;
950}
951
952static void soc_set_name_prefix(struct snd_soc_card *card,
953 struct snd_soc_component *component)
954{
955 int i;
956
957 for (i = 0; i < card->num_configs && card->codec_conf; i++) {
958 struct snd_soc_codec_conf *map = &card->codec_conf[i];
959 struct device_node *of_node = soc_component_to_node(component);
960
961 if (map->of_node && of_node != map->of_node)
962 continue;
963 if (map->dev_name && strcmp(component->name, map->dev_name))
964 continue;
965 component->name_prefix = map->name_prefix;
966 return;
967 }
968
969 /*
970 * If there is no configuration table or no match in the table,
971 * check if a prefix is provided in the node
972 */
973 soc_set_of_name_prefix(component);
974}
975
976static void soc_cleanup_component(struct snd_soc_component *component)
977{
978 /* For framework level robustness */
979 snd_soc_component_set_jack(component, NULL, NULL);
980
981 list_del_init(&component->card_list);
982 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
983 soc_cleanup_component_debugfs(component);
984 component->card = NULL;
985 snd_soc_component_module_put_when_remove(component);
986}
987
988static void soc_remove_component(struct snd_soc_component *component)
989{
990 if (!component->card)
991 return;
992
993 snd_soc_component_remove(component);
994
995 soc_cleanup_component(component);
996}
997
998static int soc_probe_component(struct snd_soc_card *card,
999 struct snd_soc_component *component)
1000{
1001 struct snd_soc_dapm_context *dapm =
1002 snd_soc_component_get_dapm(component);
1003 struct snd_soc_dai *dai;
1004 int ret;
1005
1006 if (!strcmp(component->name, "snd-soc-dummy"))
1007 return 0;
1008
1009 if (component->card) {
1010 if (component->card != card) {
1011 dev_err(component->dev,
1012 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1013 card->name, component->card->name);
1014 return -ENODEV;
1015 }
1016 return 0;
1017 }
1018
1019 ret = snd_soc_component_module_get_when_probe(component);
1020 if (ret < 0)
1021 return ret;
1022
1023 component->card = card;
1024 soc_set_name_prefix(card, component);
1025
1026 soc_init_component_debugfs(component);
1027
1028 snd_soc_dapm_init(dapm, card, component);
1029
1030 ret = snd_soc_dapm_new_controls(dapm,
1031 component->driver->dapm_widgets,
1032 component->driver->num_dapm_widgets);
1033
1034 if (ret != 0) {
1035 dev_err(component->dev,
1036 "Failed to create new controls %d\n", ret);
1037 goto err_probe;
1038 }
1039
1040 for_each_component_dais(component, dai) {
1041 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1042 if (ret != 0) {
1043 dev_err(component->dev,
1044 "Failed to create DAI widgets %d\n", ret);
1045 goto err_probe;
1046 }
1047 }
1048
1049 ret = snd_soc_component_probe(component);
1050 if (ret < 0) {
1051 dev_err(component->dev,
1052 "ASoC: failed to probe component %d\n", ret);
1053 goto err_probe;
1054 }
1055 WARN(dapm->idle_bias_off &&
1056 dapm->bias_level != SND_SOC_BIAS_OFF,
1057 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1058 component->name);
1059
1060 /* machine specific init */
1061 if (component->init) {
1062 ret = component->init(component);
1063 if (ret < 0) {
1064 dev_err(component->dev,
1065 "Failed to do machine specific init %d\n", ret);
1066 goto err_probe;
1067 }
1068 }
1069
1070 ret = snd_soc_add_component_controls(component,
1071 component->driver->controls,
1072 component->driver->num_controls);
1073 if (ret < 0)
1074 goto err_probe;
1075
1076 ret = snd_soc_dapm_add_routes(dapm,
1077 component->driver->dapm_routes,
1078 component->driver->num_dapm_routes);
1079 if (ret < 0)
1080 goto err_probe;
1081
1082 /* see for_each_card_components */
1083 list_add(&component->card_list, &card->component_dev_list);
1084
1085err_probe:
1086 if (ret < 0)
1087 soc_cleanup_component(component);
1088
1089 return ret;
1090}
1091
1092static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1093{
1094 int err;
1095
1096 if (!dai || !dai->probed || !dai->driver ||
1097 dai->driver->remove_order != order)
1098 return;
1099
1100 err = snd_soc_dai_remove(dai);
1101 if (err < 0)
1102 dev_err(dai->dev,
1103 "ASoC: failed to remove %s: %d\n",
1104 dai->name, err);
1105
1106 dai->probed = 0;
1107}
1108
1109static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1110{
1111 int ret;
1112
1113 if (dai->probed ||
1114 dai->driver->probe_order != order)
1115 return 0;
1116
1117 ret = snd_soc_dai_probe(dai);
1118 if (ret < 0) {
1119 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1120 dai->name, ret);
1121 return ret;
1122 }
1123
1124 dai->probed = 1;
1125
1126 return 0;
1127}
1128
1129static void soc_rtd_free(struct snd_soc_pcm_runtime *rtd); /* remove me */
1130static void soc_remove_link_dais(struct snd_soc_card *card)
1131{
1132 int i;
1133 struct snd_soc_dai *codec_dai;
1134 struct snd_soc_pcm_runtime *rtd;
1135 int order;
1136
1137 for_each_comp_order(order) {
1138 for_each_card_rtds(card, rtd) {
1139
1140 /* finalize rtd device */
1141 soc_rtd_free(rtd);
1142
1143 /* remove the CODEC DAI */
1144 for_each_rtd_codec_dai(rtd, i, codec_dai)
1145 soc_remove_dai(codec_dai, order);
1146
1147 soc_remove_dai(rtd->cpu_dai, order);
1148 }
1149 }
1150}
1151
1152static int soc_probe_link_dais(struct snd_soc_card *card)
1153{
1154 struct snd_soc_dai *codec_dai;
1155 struct snd_soc_pcm_runtime *rtd;
1156 int i, order, ret;
1157
1158 for_each_comp_order(order) {
1159 for_each_card_rtds(card, rtd) {
1160
1161 dev_dbg(card->dev,
1162 "ASoC: probe %s dai link %d late %d\n",
1163 card->name, rtd->num, order);
1164
1165 ret = soc_probe_dai(rtd->cpu_dai, order);
1166 if (ret)
1167 return ret;
1168
1169 /* probe the CODEC DAI */
1170 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1171 ret = soc_probe_dai(codec_dai, order);
1172 if (ret)
1173 return ret;
1174 }
1175 }
1176 }
1177
1178 return 0;
1179}
1180
1181static void soc_remove_link_components(struct snd_soc_card *card)
1182{
1183 struct snd_soc_component *component;
1184 struct snd_soc_pcm_runtime *rtd;
1185 struct snd_soc_rtdcom_list *rtdcom;
1186 int order;
1187
1188 for_each_comp_order(order) {
1189 for_each_card_rtds(card, rtd) {
1190 for_each_rtdcom(rtd, rtdcom) {
1191 component = rtdcom->component;
1192
1193 if (component->driver->remove_order != order)
1194 continue;
1195
1196 soc_remove_component(component);
1197 }
1198 }
1199 }
1200}
1201
1202static int soc_probe_link_components(struct snd_soc_card *card)
1203{
1204 struct snd_soc_component *component;
1205 struct snd_soc_pcm_runtime *rtd;
1206 struct snd_soc_rtdcom_list *rtdcom;
1207 int ret, order;
1208
1209 for_each_comp_order(order) {
1210 for_each_card_rtds(card, rtd) {
1211 for_each_rtdcom(rtd, rtdcom) {
1212 component = rtdcom->component;
1213
1214 if (component->driver->probe_order != order)
1215 continue;
1216
1217 ret = soc_probe_component(card, component);
1218 if (ret < 0)
1219 return ret;
1220 }
1221 }
1222 }
1223
1224 return 0;
1225}
1226
1227static void soc_remove_dai_links(struct snd_soc_card *card)
1228{
1229 struct snd_soc_dai_link *link, *_link;
1230
1231 soc_remove_link_dais(card);
1232
1233 soc_remove_link_components(card);
1234
1235 for_each_card_links_safe(card, link, _link) {
1236 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1237 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1238 link->name);
1239
1240 list_del(&link->list);
1241 }
1242}
1243
1244static int soc_init_dai_link(struct snd_soc_card *card,
1245 struct snd_soc_dai_link *link)
1246{
1247 int i;
1248 struct snd_soc_dai_link_component *codec, *platform;
1249
1250 for_each_link_codecs(link, i, codec) {
1251 /*
1252 * Codec must be specified by 1 of name or OF node,
1253 * not both or neither.
1254 */
1255 if (!!codec->name == !!codec->of_node) {
1256 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1257 link->name);
1258 return -EINVAL;
1259 }
1260
1261 /* Codec DAI name must be specified */
1262 if (!codec->dai_name) {
1263 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1264 link->name);
1265 return -EINVAL;
1266 }
1267
1268 /*
1269 * Defer card registration if codec component is not added to
1270 * component list.
1271 */
1272 if (!soc_find_component(codec))
1273 return -EPROBE_DEFER;
1274 }
1275
1276 for_each_link_platforms(link, i, platform) {
1277 /*
1278 * Platform may be specified by either name or OF node, but it
1279 * can be left unspecified, then no components will be inserted
1280 * in the rtdcom list
1281 */
1282 if (!!platform->name == !!platform->of_node) {
1283 dev_err(card->dev,
1284 "ASoC: Neither/both platform name/of_node are set for %s\n",
1285 link->name);
1286 return -EINVAL;
1287 }
1288
1289 /*
1290 * Defer card registration if platform component is not added to
1291 * component list.
1292 */
1293 if (!soc_find_component(platform))
1294 return -EPROBE_DEFER;
1295 }
1296
1297 /* FIXME */
1298 if (link->num_cpus > 1) {
1299 dev_err(card->dev,
1300 "ASoC: multi cpu is not yet supported %s\n",
1301 link->name);
1302 return -EINVAL;
1303 }
1304
1305 /*
1306 * CPU device may be specified by either name or OF node, but
1307 * can be left unspecified, and will be matched based on DAI
1308 * name alone..
1309 */
1310 if (link->cpus->name && link->cpus->of_node) {
1311 dev_err(card->dev,
1312 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1313 link->name);
1314 return -EINVAL;
1315 }
1316
1317 /*
1318 * Defer card registartion if cpu dai component is not added to
1319 * component list.
1320 */
1321 if ((link->cpus->of_node || link->cpus->name) &&
1322 !soc_find_component(link->cpus))
1323 return -EPROBE_DEFER;
1324
1325 /*
1326 * At least one of CPU DAI name or CPU device name/node must be
1327 * specified
1328 */
1329 if (!link->cpus->dai_name &&
1330 !(link->cpus->name || link->cpus->of_node)) {
1331 dev_err(card->dev,
1332 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1333 link->name);
1334 return -EINVAL;
1335 }
1336
1337 return 0;
1338}
1339
1340void snd_soc_disconnect_sync(struct device *dev)
1341{
1342 struct snd_soc_component *component =
1343 snd_soc_lookup_component(dev, NULL);
1344
1345 if (!component || !component->card)
1346 return;
1347
1348 snd_card_disconnect_sync(component->card->snd_card);
1349}
1350EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1351
1352/**
1353 * snd_soc_add_dai_link - Add a DAI link dynamically
1354 * @card: The ASoC card to which the DAI link is added
1355 * @dai_link: The new DAI link to add
1356 *
1357 * This function adds a DAI link to the ASoC card's link list.
1358 *
1359 * Note: Topology can use this API to add DAI links when probing the
1360 * topology component. And machine drivers can still define static
1361 * DAI links in dai_link array.
1362 */
1363int snd_soc_add_dai_link(struct snd_soc_card *card,
1364 struct snd_soc_dai_link *dai_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 -EINVAL;
1371 }
1372
1373 lockdep_assert_held(&client_mutex);
1374 /*
1375 * Notify the machine driver for extra initialization
1376 * on the link created by topology.
1377 */
1378 if (dai_link->dobj.type && card->add_dai_link)
1379 card->add_dai_link(card, dai_link);
1380
1381 /* see for_each_card_links */
1382 list_add_tail(&dai_link->list, &card->dai_link_list);
1383
1384 return 0;
1385}
1386EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1387
1388/**
1389 * snd_soc_remove_dai_link - Remove a DAI link from the list
1390 * @card: The ASoC card that owns the link
1391 * @dai_link: The DAI link to remove
1392 *
1393 * This function removes a DAI link from the ASoC card's link list.
1394 *
1395 * For DAI links previously added by topology, topology should
1396 * remove them by using the dobj embedded in the link.
1397 */
1398void snd_soc_remove_dai_link(struct snd_soc_card *card,
1399 struct snd_soc_dai_link *dai_link)
1400{
1401 if (dai_link->dobj.type
1402 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1403 dev_err(card->dev, "Invalid dai link type %d\n",
1404 dai_link->dobj.type);
1405 return;
1406 }
1407
1408 lockdep_assert_held(&client_mutex);
1409 /*
1410 * Notify the machine driver for extra destruction
1411 * on the link created by topology.
1412 */
1413 if (dai_link->dobj.type && card->remove_dai_link)
1414 card->remove_dai_link(card, dai_link);
1415
1416 list_del(&dai_link->list);
1417}
1418EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1419
1420static void soc_rtd_free(struct snd_soc_pcm_runtime *rtd)
1421{
1422 if (rtd->dev_registered) {
1423 /* we don't need to call kfree() for rtd->dev */
1424 device_unregister(rtd->dev);
1425 rtd->dev_registered = 0;
1426 }
1427}
1428
1429static void soc_rtd_release(struct device *dev)
1430{
1431 kfree(dev);
1432}
1433
1434static int soc_rtd_init(struct snd_soc_pcm_runtime *rtd, const char *name)
1435{
1436 int ret = 0;
1437
1438 /* register the rtd device */
1439 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1440 if (!rtd->dev)
1441 return -ENOMEM;
1442 rtd->dev->parent = rtd->card->dev;
1443 rtd->dev->release = soc_rtd_release;
1444 rtd->dev->groups = soc_dev_attr_groups;
1445 dev_set_name(rtd->dev, "%s", name);
1446 dev_set_drvdata(rtd->dev, rtd);
1447 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1448 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1449 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1450 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1451 ret = device_register(rtd->dev);
1452 if (ret < 0) {
1453 /* calling put_device() here to free the rtd->dev */
1454 put_device(rtd->dev);
1455 dev_err(rtd->card->dev,
1456 "ASoC: failed to register runtime device: %d\n", ret);
1457 return ret;
1458 }
1459 rtd->dev_registered = 1;
1460 return 0;
1461}
1462
1463static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1464 struct snd_soc_pcm_runtime *rtd)
1465{
1466 int i, ret = 0;
1467
1468 for (i = 0; i < num_dais; ++i) {
1469 struct snd_soc_dai_driver *drv = dais[i]->driver;
1470
1471 if (drv->pcm_new)
1472 ret = drv->pcm_new(rtd, dais[i]);
1473 if (ret < 0) {
1474 dev_err(dais[i]->dev,
1475 "ASoC: Failed to bind %s with pcm device\n",
1476 dais[i]->name);
1477 return ret;
1478 }
1479 }
1480
1481 return 0;
1482}
1483
1484static int soc_link_init(struct snd_soc_card *card,
1485 struct snd_soc_pcm_runtime *rtd)
1486{
1487 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1489 struct snd_soc_rtdcom_list *rtdcom;
1490 struct snd_soc_component *component;
1491 int ret, num;
1492
1493 /* set default power off timeout */
1494 rtd->pmdown_time = pmdown_time;
1495
1496 /* do machine specific initialization */
1497 if (dai_link->init) {
1498 ret = dai_link->init(rtd);
1499 if (ret < 0) {
1500 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1501 dai_link->name, ret);
1502 return ret;
1503 }
1504 }
1505
1506 if (dai_link->dai_fmt) {
1507 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1508 if (ret)
1509 return ret;
1510 }
1511
1512 ret = soc_rtd_init(rtd, dai_link->name);
1513 if (ret)
1514 return ret;
1515
1516 /* add DPCM sysfs entries */
1517 soc_dpcm_debugfs_add(rtd);
1518
1519 num = rtd->num;
1520
1521 /*
1522 * most drivers will register their PCMs using DAI link ordering but
1523 * topology based drivers can use the DAI link id field to set PCM
1524 * device number and then use rtd + a base offset of the BEs.
1525 */
1526 for_each_rtdcom(rtd, rtdcom) {
1527 component = rtdcom->component;
1528
1529 if (!component->driver->use_dai_pcm_id)
1530 continue;
1531
1532 if (rtd->dai_link->no_pcm)
1533 num += component->driver->be_pcm_base;
1534 else
1535 num = rtd->dai_link->id;
1536 }
1537
1538 /* create compress_device if possible */
1539 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1540 if (ret != -ENOTSUPP) {
1541 if (ret < 0)
1542 dev_err(card->dev, "ASoC: can't create compress %s\n",
1543 dai_link->stream_name);
1544 return ret;
1545 }
1546
1547 /* create the pcm */
1548 ret = soc_new_pcm(rtd, num);
1549 if (ret < 0) {
1550 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1551 dai_link->stream_name, ret);
1552 return ret;
1553 }
1554 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1555 if (ret < 0)
1556 return ret;
1557 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1558 rtd->num_codecs, rtd);
1559 return ret;
1560}
1561
1562static void soc_unbind_aux_dev(struct snd_soc_card *card)
1563{
1564 struct snd_soc_component *component, *_component;
1565
1566 for_each_card_auxs_safe(card, component, _component) {
1567 component->init = NULL;
1568 list_del(&component->card_aux_list);
1569 }
1570}
1571
1572static int soc_bind_aux_dev(struct snd_soc_card *card)
1573{
1574 struct snd_soc_component *component;
1575 struct snd_soc_aux_dev *aux;
1576 int i;
1577
1578 for_each_card_pre_auxs(card, i, aux) {
1579 /* codecs, usually analog devices */
1580 component = soc_find_component(&aux->dlc);
1581 if (!component)
1582 return -EPROBE_DEFER;
1583
1584 component->init = aux->init;
1585 /* see for_each_card_auxs */
1586 list_add(&component->card_aux_list, &card->aux_comp_list);
1587 }
1588 return 0;
1589}
1590
1591static int soc_probe_aux_devices(struct snd_soc_card *card)
1592{
1593 struct snd_soc_component *comp;
1594 int order;
1595 int ret;
1596
1597 for_each_comp_order(order) {
1598 for_each_card_auxs(card, comp) {
1599 if (comp->driver->probe_order == order) {
1600 ret = soc_probe_component(card, comp);
1601 if (ret < 0) {
1602 dev_err(card->dev,
1603 "ASoC: failed to probe aux component %s %d\n",
1604 comp->name, ret);
1605 return ret;
1606 }
1607 }
1608 }
1609 }
1610
1611 return 0;
1612}
1613
1614static void soc_remove_aux_devices(struct snd_soc_card *card)
1615{
1616 struct snd_soc_component *comp, *_comp;
1617 int order;
1618
1619 for_each_comp_order(order) {
1620 for_each_card_auxs_safe(card, comp, _comp) {
1621 if (comp->driver->remove_order == order)
1622 soc_remove_component(comp);
1623 }
1624 }
1625}
1626
1627/**
1628 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1629 * @rtd: The runtime for which the DAI link format should be changed
1630 * @dai_fmt: The new DAI link format
1631 *
1632 * This function updates the DAI link format for all DAIs connected to the DAI
1633 * link for the specified runtime.
1634 *
1635 * Note: For setups with a static format set the dai_fmt field in the
1636 * corresponding snd_dai_link struct instead of using this function.
1637 *
1638 * Returns 0 on success, otherwise a negative error code.
1639 */
1640int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1641 unsigned int dai_fmt)
1642{
1643 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1644 struct snd_soc_dai *codec_dai;
1645 unsigned int i;
1646 int ret;
1647
1648 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1649 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1650 if (ret != 0 && ret != -ENOTSUPP) {
1651 dev_warn(codec_dai->dev,
1652 "ASoC: Failed to set DAI format: %d\n", ret);
1653 return ret;
1654 }
1655 }
1656
1657 /*
1658 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1659 * the component which has non_legacy_dai_naming is Codec
1660 */
1661 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1662 unsigned int inv_dai_fmt;
1663
1664 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1665 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1666 case SND_SOC_DAIFMT_CBM_CFM:
1667 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1668 break;
1669 case SND_SOC_DAIFMT_CBM_CFS:
1670 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1671 break;
1672 case SND_SOC_DAIFMT_CBS_CFM:
1673 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1674 break;
1675 case SND_SOC_DAIFMT_CBS_CFS:
1676 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1677 break;
1678 }
1679
1680 dai_fmt = inv_dai_fmt;
1681 }
1682
1683 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1684 if (ret != 0 && ret != -ENOTSUPP) {
1685 dev_warn(cpu_dai->dev,
1686 "ASoC: Failed to set DAI format: %d\n", ret);
1687 return ret;
1688 }
1689
1690 return 0;
1691}
1692EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1693
1694#ifdef CONFIG_DMI
1695/*
1696 * Trim special characters, and replace '-' with '_' since '-' is used to
1697 * separate different DMI fields in the card long name. Only number and
1698 * alphabet characters and a few separator characters are kept.
1699 */
1700static void cleanup_dmi_name(char *name)
1701{
1702 int i, j = 0;
1703
1704 for (i = 0; name[i]; i++) {
1705 if (isalnum(name[i]) || (name[i] == '.')
1706 || (name[i] == '_'))
1707 name[j++] = name[i];
1708 else if (name[i] == '-')
1709 name[j++] = '_';
1710 }
1711
1712 name[j] = '\0';
1713}
1714
1715/*
1716 * Check if a DMI field is valid, i.e. not containing any string
1717 * in the black list.
1718 */
1719static int is_dmi_valid(const char *field)
1720{
1721 int i = 0;
1722
1723 while (dmi_blacklist[i]) {
1724 if (strstr(field, dmi_blacklist[i]))
1725 return 0;
1726 i++;
1727 }
1728
1729 return 1;
1730}
1731
1732/**
1733 * snd_soc_set_dmi_name() - Register DMI names to card
1734 * @card: The card to register DMI names
1735 * @flavour: The flavour "differentiator" for the card amongst its peers.
1736 *
1737 * An Intel machine driver may be used by many different devices but are
1738 * difficult for userspace to differentiate, since machine drivers ususally
1739 * use their own name as the card short name and leave the card long name
1740 * blank. To differentiate such devices and fix bugs due to lack of
1741 * device-specific configurations, this function allows DMI info to be used
1742 * as the sound card long name, in the format of
1743 * "vendor-product-version-board"
1744 * (Character '-' is used to separate different DMI fields here).
1745 * This will help the user space to load the device-specific Use Case Manager
1746 * (UCM) configurations for the card.
1747 *
1748 * Possible card long names may be:
1749 * DellInc.-XPS139343-01-0310JH
1750 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1751 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1752 *
1753 * This function also supports flavoring the card longname to provide
1754 * the extra differentiation, like "vendor-product-version-board-flavor".
1755 *
1756 * We only keep number and alphabet characters and a few separator characters
1757 * in the card long name since UCM in the user space uses the card long names
1758 * as card configuration directory names and AudoConf cannot support special
1759 * charactors like SPACE.
1760 *
1761 * Returns 0 on success, otherwise a negative error code.
1762 */
1763int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1764{
1765 const char *vendor, *product, *product_version, *board;
1766 size_t longname_buf_size = sizeof(card->snd_card->longname);
1767 size_t len;
1768
1769 if (card->long_name)
1770 return 0; /* long name already set by driver or from DMI */
1771
1772 /* make up dmi long name as: vendor.product.version.board */
1773 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1774 if (!vendor || !is_dmi_valid(vendor)) {
1775 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1776 return 0;
1777 }
1778
1779 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1780 "%s", vendor);
1781 cleanup_dmi_name(card->dmi_longname);
1782
1783 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1784 if (product && is_dmi_valid(product)) {
1785 len = strlen(card->dmi_longname);
1786 snprintf(card->dmi_longname + len,
1787 longname_buf_size - len,
1788 "-%s", product);
1789
1790 len++; /* skip the separator "-" */
1791 if (len < longname_buf_size)
1792 cleanup_dmi_name(card->dmi_longname + len);
1793
1794 /*
1795 * some vendors like Lenovo may only put a self-explanatory
1796 * name in the product version field
1797 */
1798 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1799 if (product_version && is_dmi_valid(product_version)) {
1800 len = strlen(card->dmi_longname);
1801 snprintf(card->dmi_longname + len,
1802 longname_buf_size - len,
1803 "-%s", product_version);
1804
1805 len++;
1806 if (len < longname_buf_size)
1807 cleanup_dmi_name(card->dmi_longname + len);
1808 }
1809 }
1810
1811 board = dmi_get_system_info(DMI_BOARD_NAME);
1812 if (board && is_dmi_valid(board)) {
1813 len = strlen(card->dmi_longname);
1814 snprintf(card->dmi_longname + len,
1815 longname_buf_size - len,
1816 "-%s", board);
1817
1818 len++;
1819 if (len < longname_buf_size)
1820 cleanup_dmi_name(card->dmi_longname + len);
1821 } else if (!product) {
1822 /* fall back to using legacy name */
1823 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1824 return 0;
1825 }
1826
1827 /* Add flavour to dmi long name */
1828 if (flavour) {
1829 len = strlen(card->dmi_longname);
1830 snprintf(card->dmi_longname + len,
1831 longname_buf_size - len,
1832 "-%s", flavour);
1833
1834 len++;
1835 if (len < longname_buf_size)
1836 cleanup_dmi_name(card->dmi_longname + len);
1837 }
1838
1839 /* set the card long name */
1840 card->long_name = card->dmi_longname;
1841
1842 return 0;
1843}
1844EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1845#endif /* CONFIG_DMI */
1846
1847static void soc_check_tplg_fes(struct snd_soc_card *card)
1848{
1849 struct snd_soc_component *component;
1850 const struct snd_soc_component_driver *comp_drv;
1851 struct snd_soc_dai_link *dai_link;
1852 int i;
1853
1854 for_each_component(component) {
1855
1856 /* does this component override FEs ? */
1857 if (!component->driver->ignore_machine)
1858 continue;
1859
1860 /* for this machine ? */
1861 if (!strcmp(component->driver->ignore_machine,
1862 card->dev->driver->name))
1863 goto match;
1864 if (strcmp(component->driver->ignore_machine,
1865 dev_name(card->dev)))
1866 continue;
1867match:
1868 /* machine matches, so override the rtd data */
1869 for_each_card_prelinks(card, i, dai_link) {
1870
1871 /* ignore this FE */
1872 if (dai_link->dynamic) {
1873 dai_link->ignore = true;
1874 continue;
1875 }
1876
1877 dev_info(card->dev, "info: override FE DAI link %s\n",
1878 card->dai_link[i].name);
1879
1880 /* override platform component */
1881 if (!dai_link->platforms) {
1882 dev_err(card->dev, "init platform error");
1883 continue;
1884 }
1885 dai_link->platforms->name = component->name;
1886
1887 /* convert non BE into BE */
1888 dai_link->no_pcm = 1;
1889
1890 /* override any BE fixups */
1891 dai_link->be_hw_params_fixup =
1892 component->driver->be_hw_params_fixup;
1893
1894 /*
1895 * most BE links don't set stream name, so set it to
1896 * dai link name if it's NULL to help bind widgets.
1897 */
1898 if (!dai_link->stream_name)
1899 dai_link->stream_name = dai_link->name;
1900 }
1901
1902 /* Inform userspace we are using alternate topology */
1903 if (component->driver->topology_name_prefix) {
1904
1905 /* topology shortname created? */
1906 if (!card->topology_shortname_created) {
1907 comp_drv = component->driver;
1908
1909 snprintf(card->topology_shortname, 32, "%s-%s",
1910 comp_drv->topology_name_prefix,
1911 card->name);
1912 card->topology_shortname_created = true;
1913 }
1914
1915 /* use topology shortname */
1916 card->name = card->topology_shortname;
1917 }
1918 }
1919}
1920
1921static void soc_cleanup_card_resources(struct snd_soc_card *card)
1922{
1923 /* free the ALSA card at first; this syncs with pending operations */
1924 if (card->snd_card) {
1925 snd_card_free(card->snd_card);
1926 card->snd_card = NULL;
1927 }
1928
1929 /* remove and free each DAI */
1930 soc_remove_dai_links(card);
1931 soc_remove_pcm_runtimes(card);
1932
1933 /* remove auxiliary devices */
1934 soc_remove_aux_devices(card);
1935 soc_unbind_aux_dev(card);
1936
1937 snd_soc_dapm_free(&card->dapm);
1938 soc_cleanup_card_debugfs(card);
1939
1940 /* remove the card */
1941 if (card->remove)
1942 card->remove(card);
1943}
1944
1945static int snd_soc_instantiate_card(struct snd_soc_card *card)
1946{
1947 struct snd_soc_pcm_runtime *rtd;
1948 struct snd_soc_dai_link *dai_link;
1949 int ret, i;
1950
1951 mutex_lock(&client_mutex);
1952 for_each_card_prelinks(card, i, dai_link) {
1953 ret = soc_init_dai_link(card, dai_link);
1954 if (ret) {
1955 dev_err(card->dev, "ASoC: failed to init link %s: %d\n",
1956 dai_link->name, ret);
1957 mutex_unlock(&client_mutex);
1958 return ret;
1959 }
1960 }
1961 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1962
1963 snd_soc_dapm_init(&card->dapm, card, NULL);
1964
1965 /* check whether any platform is ignore machine FE and using topology */
1966 soc_check_tplg_fes(card);
1967
1968 /* bind DAIs */
1969 for_each_card_prelinks(card, i, dai_link) {
1970 ret = soc_bind_dai_link(card, dai_link);
1971 if (ret != 0)
1972 goto probe_end;
1973 }
1974
1975 /* bind aux_devs too */
1976 ret = soc_bind_aux_dev(card);
1977 if (ret < 0)
1978 goto probe_end;
1979
1980 /* add predefined DAI links to the list */
1981 for_each_card_prelinks(card, i, dai_link) {
1982 ret = snd_soc_add_dai_link(card, dai_link);
1983 if (ret < 0)
1984 goto probe_end;
1985 }
1986
1987 /* card bind complete so register a sound card */
1988 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1989 card->owner, 0, &card->snd_card);
1990 if (ret < 0) {
1991 dev_err(card->dev,
1992 "ASoC: can't create sound card for card %s: %d\n",
1993 card->name, ret);
1994 goto probe_end;
1995 }
1996
1997 soc_init_card_debugfs(card);
1998
1999 soc_resume_init(card);
2000
2001 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2002 card->num_dapm_widgets);
2003 if (ret < 0)
2004 goto probe_end;
2005
2006 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2007 card->num_of_dapm_widgets);
2008 if (ret < 0)
2009 goto probe_end;
2010
2011 /* initialise the sound card only once */
2012 if (card->probe) {
2013 ret = card->probe(card);
2014 if (ret < 0)
2015 goto probe_end;
2016 }
2017
2018 /* probe all components used by DAI links on this card */
2019 ret = soc_probe_link_components(card);
2020 if (ret < 0) {
2021 dev_err(card->dev,
2022 "ASoC: failed to instantiate card %d\n", ret);
2023 goto probe_end;
2024 }
2025
2026 /* probe auxiliary components */
2027 ret = soc_probe_aux_devices(card);
2028 if (ret < 0)
2029 goto probe_end;
2030
2031 /*
2032 * Find new DAI links added during probing components and bind them.
2033 * Components with topology may bring new DAIs and DAI links.
2034 */
2035 for_each_card_links(card, dai_link) {
2036 if (soc_is_dai_link_bound(card, dai_link))
2037 continue;
2038
2039 ret = soc_init_dai_link(card, dai_link);
2040 if (ret)
2041 goto probe_end;
2042 ret = soc_bind_dai_link(card, dai_link);
2043 if (ret)
2044 goto probe_end;
2045 }
2046
2047 /* probe all DAI links on this card */
2048 ret = soc_probe_link_dais(card);
2049 if (ret < 0) {
2050 dev_err(card->dev,
2051 "ASoC: failed to instantiate card %d\n", ret);
2052 goto probe_end;
2053 }
2054
2055 for_each_card_rtds(card, rtd)
2056 soc_link_init(card, rtd);
2057
2058 snd_soc_dapm_link_dai_widgets(card);
2059 snd_soc_dapm_connect_dai_link_widgets(card);
2060
2061 ret = snd_soc_add_card_controls(card, card->controls,
2062 card->num_controls);
2063 if (ret < 0)
2064 goto probe_end;
2065
2066 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2067 card->num_dapm_routes);
2068 if (ret < 0)
2069 goto probe_end;
2070
2071 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2072 card->num_of_dapm_routes);
2073 if (ret < 0)
2074 goto probe_end;
2075
2076 /* try to set some sane longname if DMI is available */
2077 snd_soc_set_dmi_name(card, NULL);
2078
2079 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2080 "%s", card->name);
2081 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2082 "%s", card->long_name ? card->long_name : card->name);
2083 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2084 "%s", card->driver_name ? card->driver_name : card->name);
2085 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2086 switch (card->snd_card->driver[i]) {
2087 case '_':
2088 case '-':
2089 case '\0':
2090 break;
2091 default:
2092 if (!isalnum(card->snd_card->driver[i]))
2093 card->snd_card->driver[i] = '_';
2094 break;
2095 }
2096 }
2097
2098 if (card->late_probe) {
2099 ret = card->late_probe(card);
2100 if (ret < 0) {
2101 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2102 card->name, ret);
2103 goto probe_end;
2104 }
2105 }
2106
2107 snd_soc_dapm_new_widgets(card);
2108
2109 ret = snd_card_register(card->snd_card);
2110 if (ret < 0) {
2111 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2112 ret);
2113 goto probe_end;
2114 }
2115
2116 card->instantiated = 1;
2117 dapm_mark_endpoints_dirty(card);
2118 snd_soc_dapm_sync(&card->dapm);
2119
2120probe_end:
2121 if (ret < 0)
2122 soc_cleanup_card_resources(card);
2123
2124 mutex_unlock(&card->mutex);
2125 mutex_unlock(&client_mutex);
2126
2127 return ret;
2128}
2129
2130/* probes a new socdev */
2131static int soc_probe(struct platform_device *pdev)
2132{
2133 struct snd_soc_card *card = platform_get_drvdata(pdev);
2134
2135 /*
2136 * no card, so machine driver should be registering card
2137 * we should not be here in that case so ret error
2138 */
2139 if (!card)
2140 return -EINVAL;
2141
2142 dev_warn(&pdev->dev,
2143 "ASoC: machine %s should use snd_soc_register_card()\n",
2144 card->name);
2145
2146 /* Bodge while we unpick instantiation */
2147 card->dev = &pdev->dev;
2148
2149 return snd_soc_register_card(card);
2150}
2151
2152/* removes a socdev */
2153static int soc_remove(struct platform_device *pdev)
2154{
2155 struct snd_soc_card *card = platform_get_drvdata(pdev);
2156
2157 snd_soc_unregister_card(card);
2158 return 0;
2159}
2160
2161int snd_soc_poweroff(struct device *dev)
2162{
2163 struct snd_soc_card *card = dev_get_drvdata(dev);
2164 struct snd_soc_pcm_runtime *rtd;
2165
2166 if (!card->instantiated)
2167 return 0;
2168
2169 /*
2170 * Flush out pmdown_time work - we actually do want to run it
2171 * now, we're shutting down so no imminent restart.
2172 */
2173 snd_soc_flush_all_delayed_work(card);
2174
2175 snd_soc_dapm_shutdown(card);
2176
2177 /* deactivate pins to sleep state */
2178 for_each_card_rtds(card, rtd) {
2179 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2180 struct snd_soc_dai *codec_dai;
2181 int i;
2182
2183 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2184 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2185 pinctrl_pm_select_sleep_state(codec_dai->dev);
2186 }
2187 }
2188
2189 return 0;
2190}
2191EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2192
2193const struct dev_pm_ops snd_soc_pm_ops = {
2194 .suspend = snd_soc_suspend,
2195 .resume = snd_soc_resume,
2196 .freeze = snd_soc_suspend,
2197 .thaw = snd_soc_resume,
2198 .poweroff = snd_soc_poweroff,
2199 .restore = snd_soc_resume,
2200};
2201EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2202
2203/* ASoC platform driver */
2204static struct platform_driver soc_driver = {
2205 .driver = {
2206 .name = "soc-audio",
2207 .pm = &snd_soc_pm_ops,
2208 },
2209 .probe = soc_probe,
2210 .remove = soc_remove,
2211};
2212
2213/**
2214 * snd_soc_cnew - create new control
2215 * @_template: control template
2216 * @data: control private data
2217 * @long_name: control long name
2218 * @prefix: control name prefix
2219 *
2220 * Create a new mixer control from a template control.
2221 *
2222 * Returns 0 for success, else error.
2223 */
2224struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2225 void *data, const char *long_name,
2226 const char *prefix)
2227{
2228 struct snd_kcontrol_new template;
2229 struct snd_kcontrol *kcontrol;
2230 char *name = NULL;
2231
2232 memcpy(&template, _template, sizeof(template));
2233 template.index = 0;
2234
2235 if (!long_name)
2236 long_name = template.name;
2237
2238 if (prefix) {
2239 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2240 if (!name)
2241 return NULL;
2242
2243 template.name = name;
2244 } else {
2245 template.name = long_name;
2246 }
2247
2248 kcontrol = snd_ctl_new1(&template, data);
2249
2250 kfree(name);
2251
2252 return kcontrol;
2253}
2254EXPORT_SYMBOL_GPL(snd_soc_cnew);
2255
2256static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2257 const struct snd_kcontrol_new *controls, int num_controls,
2258 const char *prefix, void *data)
2259{
2260 int err, i;
2261
2262 for (i = 0; i < num_controls; i++) {
2263 const struct snd_kcontrol_new *control = &controls[i];
2264
2265 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2266 control->name, prefix));
2267 if (err < 0) {
2268 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2269 control->name, err);
2270 return err;
2271 }
2272 }
2273
2274 return 0;
2275}
2276
2277struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2278 const char *name)
2279{
2280 struct snd_card *card = soc_card->snd_card;
2281 struct snd_kcontrol *kctl;
2282
2283 if (unlikely(!name))
2284 return NULL;
2285
2286 list_for_each_entry(kctl, &card->controls, list)
2287 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2288 return kctl;
2289 return NULL;
2290}
2291EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2292
2293/**
2294 * snd_soc_add_component_controls - Add an array of controls to a component.
2295 *
2296 * @component: Component to add controls to
2297 * @controls: Array of controls to add
2298 * @num_controls: Number of elements in the array
2299 *
2300 * Return: 0 for success, else error.
2301 */
2302int snd_soc_add_component_controls(struct snd_soc_component *component,
2303 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2304{
2305 struct snd_card *card = component->card->snd_card;
2306
2307 return snd_soc_add_controls(card, component->dev, controls,
2308 num_controls, component->name_prefix, component);
2309}
2310EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2311
2312/**
2313 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2314 * Convenience function to add a list of controls.
2315 *
2316 * @soc_card: SoC card to add controls to
2317 * @controls: array of controls to add
2318 * @num_controls: number of elements in the array
2319 *
2320 * Return 0 for success, else error.
2321 */
2322int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2323 const struct snd_kcontrol_new *controls, int num_controls)
2324{
2325 struct snd_card *card = soc_card->snd_card;
2326
2327 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2328 NULL, soc_card);
2329}
2330EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2331
2332/**
2333 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2334 * Convienience function to add a list of controls.
2335 *
2336 * @dai: DAI to add controls to
2337 * @controls: array of controls to add
2338 * @num_controls: number of elements in the array
2339 *
2340 * Return 0 for success, else error.
2341 */
2342int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2343 const struct snd_kcontrol_new *controls, int num_controls)
2344{
2345 struct snd_card *card = dai->component->card->snd_card;
2346
2347 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2348 NULL, dai);
2349}
2350EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2351
2352static int snd_soc_bind_card(struct snd_soc_card *card)
2353{
2354 struct snd_soc_pcm_runtime *rtd;
2355 int ret;
2356
2357 ret = snd_soc_instantiate_card(card);
2358 if (ret != 0)
2359 return ret;
2360
2361 /* deactivate pins to sleep state */
2362 for_each_card_rtds(card, rtd) {
2363 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2364 struct snd_soc_dai *codec_dai;
2365 int j;
2366
2367 for_each_rtd_codec_dai(rtd, j, codec_dai) {
2368 if (!codec_dai->active)
2369 pinctrl_pm_select_sleep_state(codec_dai->dev);
2370 }
2371
2372 if (!cpu_dai->active)
2373 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2374 }
2375
2376 return ret;
2377}
2378
2379/**
2380 * snd_soc_register_card - Register a card with the ASoC core
2381 *
2382 * @card: Card to register
2383 *
2384 */
2385int snd_soc_register_card(struct snd_soc_card *card)
2386{
2387 if (!card->name || !card->dev)
2388 return -EINVAL;
2389
2390 dev_set_drvdata(card->dev, card);
2391
2392 INIT_LIST_HEAD(&card->widgets);
2393 INIT_LIST_HEAD(&card->paths);
2394 INIT_LIST_HEAD(&card->dapm_list);
2395 INIT_LIST_HEAD(&card->aux_comp_list);
2396 INIT_LIST_HEAD(&card->component_dev_list);
2397 INIT_LIST_HEAD(&card->list);
2398 INIT_LIST_HEAD(&card->dai_link_list);
2399 INIT_LIST_HEAD(&card->rtd_list);
2400 INIT_LIST_HEAD(&card->dapm_dirty);
2401 INIT_LIST_HEAD(&card->dobj_list);
2402
2403 card->num_rtd = 0;
2404 card->instantiated = 0;
2405 mutex_init(&card->mutex);
2406 mutex_init(&card->dapm_mutex);
2407 mutex_init(&card->pcm_mutex);
2408 spin_lock_init(&card->dpcm_lock);
2409
2410 return snd_soc_bind_card(card);
2411}
2412EXPORT_SYMBOL_GPL(snd_soc_register_card);
2413
2414static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2415{
2416 if (card->instantiated) {
2417 card->instantiated = false;
2418 snd_soc_dapm_shutdown(card);
2419 snd_soc_flush_all_delayed_work(card);
2420
2421 /* remove all components used by DAI links on this card */
2422 soc_remove_link_components(card);
2423
2424 soc_cleanup_card_resources(card);
2425 if (!unregister)
2426 list_add(&card->list, &unbind_card_list);
2427 } else {
2428 if (unregister)
2429 list_del(&card->list);
2430 }
2431}
2432
2433/**
2434 * snd_soc_unregister_card - Unregister a card with the ASoC core
2435 *
2436 * @card: Card to unregister
2437 *
2438 */
2439int snd_soc_unregister_card(struct snd_soc_card *card)
2440{
2441 mutex_lock(&client_mutex);
2442 snd_soc_unbind_card(card, true);
2443 mutex_unlock(&client_mutex);
2444 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2445
2446 return 0;
2447}
2448EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2449
2450/*
2451 * Simplify DAI link configuration by removing ".-1" from device names
2452 * and sanitizing names.
2453 */
2454static char *fmt_single_name(struct device *dev, int *id)
2455{
2456 char *found, name[NAME_SIZE];
2457 int id1, id2;
2458
2459 if (dev_name(dev) == NULL)
2460 return NULL;
2461
2462 strlcpy(name, dev_name(dev), NAME_SIZE);
2463
2464 /* are we a "%s.%d" name (platform and SPI components) */
2465 found = strstr(name, dev->driver->name);
2466 if (found) {
2467 /* get ID */
2468 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2469
2470 /* discard ID from name if ID == -1 */
2471 if (*id == -1)
2472 found[strlen(dev->driver->name)] = '\0';
2473 }
2474
2475 } else {
2476 /* I2C component devices are named "bus-addr" */
2477 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2478 char tmp[NAME_SIZE];
2479
2480 /* create unique ID number from I2C addr and bus */
2481 *id = ((id1 & 0xffff) << 16) + id2;
2482
2483 /* sanitize component name for DAI link creation */
2484 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2485 name);
2486 strlcpy(name, tmp, NAME_SIZE);
2487 } else
2488 *id = 0;
2489 }
2490
2491 return kstrdup(name, GFP_KERNEL);
2492}
2493
2494/*
2495 * Simplify DAI link naming for single devices with multiple DAIs by removing
2496 * any ".-1" and using the DAI name (instead of device name).
2497 */
2498static inline char *fmt_multiple_name(struct device *dev,
2499 struct snd_soc_dai_driver *dai_drv)
2500{
2501 if (dai_drv->name == NULL) {
2502 dev_err(dev,
2503 "ASoC: error - multiple DAI %s registered with no name\n",
2504 dev_name(dev));
2505 return NULL;
2506 }
2507
2508 return kstrdup(dai_drv->name, GFP_KERNEL);
2509}
2510
2511/**
2512 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2513 *
2514 * @component: The component for which the DAIs should be unregistered
2515 */
2516static void snd_soc_unregister_dais(struct snd_soc_component *component)
2517{
2518 struct snd_soc_dai *dai, *_dai;
2519
2520 for_each_component_dais_safe(component, dai, _dai) {
2521 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2522 dai->name);
2523 list_del(&dai->list);
2524 kfree(dai->name);
2525 kfree(dai);
2526 }
2527}
2528
2529/* Create a DAI and add it to the component's DAI list */
2530static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2531 struct snd_soc_dai_driver *dai_drv,
2532 bool legacy_dai_naming)
2533{
2534 struct device *dev = component->dev;
2535 struct snd_soc_dai *dai;
2536
2537 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2538
2539 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2540 if (dai == NULL)
2541 return NULL;
2542
2543 /*
2544 * Back in the old days when we still had component-less DAIs,
2545 * instead of having a static name, component-less DAIs would
2546 * inherit the name of the parent device so it is possible to
2547 * register multiple instances of the DAI. We still need to keep
2548 * the same naming style even though those DAIs are not
2549 * component-less anymore.
2550 */
2551 if (legacy_dai_naming &&
2552 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2553 dai->name = fmt_single_name(dev, &dai->id);
2554 } else {
2555 dai->name = fmt_multiple_name(dev, dai_drv);
2556 if (dai_drv->id)
2557 dai->id = dai_drv->id;
2558 else
2559 dai->id = component->num_dai;
2560 }
2561 if (dai->name == NULL) {
2562 kfree(dai);
2563 return NULL;
2564 }
2565
2566 dai->component = component;
2567 dai->dev = dev;
2568 dai->driver = dai_drv;
2569 if (!dai->driver->ops)
2570 dai->driver->ops = &null_dai_ops;
2571
2572 /* see for_each_component_dais */
2573 list_add_tail(&dai->list, &component->dai_list);
2574 component->num_dai++;
2575
2576 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2577 return dai;
2578}
2579
2580/**
2581 * snd_soc_register_dais - Register a DAI with the ASoC core
2582 *
2583 * @component: The component the DAIs are registered for
2584 * @dai_drv: DAI driver to use for the DAIs
2585 * @count: Number of DAIs
2586 */
2587static int snd_soc_register_dais(struct snd_soc_component *component,
2588 struct snd_soc_dai_driver *dai_drv,
2589 size_t count)
2590{
2591 struct device *dev = component->dev;
2592 struct snd_soc_dai *dai;
2593 unsigned int i;
2594 int ret;
2595
2596 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
2597
2598 for (i = 0; i < count; i++) {
2599
2600 dai = soc_add_dai(component, dai_drv + i, count == 1 &&
2601 !component->driver->non_legacy_dai_naming);
2602 if (dai == NULL) {
2603 ret = -ENOMEM;
2604 goto err;
2605 }
2606 }
2607
2608 return 0;
2609
2610err:
2611 snd_soc_unregister_dais(component);
2612
2613 return ret;
2614}
2615
2616/**
2617 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2618 *
2619 * @component: The component the DAIs are registered for
2620 * @dai_drv: DAI driver to use for the DAI
2621 *
2622 * Topology can use this API to register DAIs when probing a component.
2623 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2624 * will be freed in the component cleanup.
2625 */
2626int snd_soc_register_dai(struct snd_soc_component *component,
2627 struct snd_soc_dai_driver *dai_drv)
2628{
2629 struct snd_soc_dapm_context *dapm =
2630 snd_soc_component_get_dapm(component);
2631 struct snd_soc_dai *dai;
2632 int ret;
2633
2634 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2635 dev_err(component->dev, "Invalid dai type %d\n",
2636 dai_drv->dobj.type);
2637 return -EINVAL;
2638 }
2639
2640 lockdep_assert_held(&client_mutex);
2641 dai = soc_add_dai(component, dai_drv, false);
2642 if (!dai)
2643 return -ENOMEM;
2644
2645 /*
2646 * Create the DAI widgets here. After adding DAIs, topology may
2647 * also add routes that need these widgets as source or sink.
2648 */
2649 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2650 if (ret != 0) {
2651 dev_err(component->dev,
2652 "Failed to create DAI widgets %d\n", ret);
2653 }
2654
2655 return ret;
2656}
2657EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2658
2659static int snd_soc_component_initialize(struct snd_soc_component *component,
2660 const struct snd_soc_component_driver *driver, struct device *dev)
2661{
2662 INIT_LIST_HEAD(&component->dai_list);
2663 INIT_LIST_HEAD(&component->dobj_list);
2664 INIT_LIST_HEAD(&component->card_list);
2665 mutex_init(&component->io_mutex);
2666
2667 component->name = fmt_single_name(dev, &component->id);
2668 if (!component->name) {
2669 dev_err(dev, "ASoC: Failed to allocate name\n");
2670 return -ENOMEM;
2671 }
2672
2673 component->dev = dev;
2674 component->driver = driver;
2675
2676 return 0;
2677}
2678
2679static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2680{
2681 int val_bytes = regmap_get_val_bytes(component->regmap);
2682
2683 /* Errors are legitimate for non-integer byte multiples */
2684 if (val_bytes > 0)
2685 component->val_bytes = val_bytes;
2686}
2687
2688#ifdef CONFIG_REGMAP
2689
2690/**
2691 * snd_soc_component_init_regmap() - Initialize regmap instance for the
2692 * component
2693 * @component: The component for which to initialize the regmap instance
2694 * @regmap: The regmap instance that should be used by the component
2695 *
2696 * This function allows deferred assignment of the regmap instance that is
2697 * associated with the component. Only use this if the regmap instance is not
2698 * yet ready when the component is registered. The function must also be called
2699 * before the first IO attempt of the component.
2700 */
2701void snd_soc_component_init_regmap(struct snd_soc_component *component,
2702 struct regmap *regmap)
2703{
2704 component->regmap = regmap;
2705 snd_soc_component_setup_regmap(component);
2706}
2707EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2708
2709/**
2710 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
2711 * component
2712 * @component: The component for which to de-initialize the regmap instance
2713 *
2714 * Calls regmap_exit() on the regmap instance associated to the component and
2715 * removes the regmap instance from the component.
2716 *
2717 * This function should only be used if snd_soc_component_init_regmap() was used
2718 * to initialize the regmap instance.
2719 */
2720void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2721{
2722 regmap_exit(component->regmap);
2723 component->regmap = NULL;
2724}
2725EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2726
2727#endif
2728
2729static void snd_soc_component_add(struct snd_soc_component *component)
2730{
2731 mutex_lock(&client_mutex);
2732
2733 if (!component->driver->write && !component->driver->read) {
2734 if (!component->regmap)
2735 component->regmap = dev_get_regmap(component->dev,
2736 NULL);
2737 if (component->regmap)
2738 snd_soc_component_setup_regmap(component);
2739 }
2740
2741 /* see for_each_component */
2742 list_add(&component->list, &component_list);
2743
2744 mutex_unlock(&client_mutex);
2745}
2746
2747static void snd_soc_component_cleanup(struct snd_soc_component *component)
2748{
2749 snd_soc_unregister_dais(component);
2750 kfree(component->name);
2751}
2752
2753static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2754{
2755 struct snd_soc_card *card = component->card;
2756
2757 if (card)
2758 snd_soc_unbind_card(card, false);
2759
2760 list_del(&component->list);
2761}
2762
2763#define ENDIANNESS_MAP(name) \
2764 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2765static u64 endianness_format_map[] = {
2766 ENDIANNESS_MAP(S16_),
2767 ENDIANNESS_MAP(U16_),
2768 ENDIANNESS_MAP(S24_),
2769 ENDIANNESS_MAP(U24_),
2770 ENDIANNESS_MAP(S32_),
2771 ENDIANNESS_MAP(U32_),
2772 ENDIANNESS_MAP(S24_3),
2773 ENDIANNESS_MAP(U24_3),
2774 ENDIANNESS_MAP(S20_3),
2775 ENDIANNESS_MAP(U20_3),
2776 ENDIANNESS_MAP(S18_3),
2777 ENDIANNESS_MAP(U18_3),
2778 ENDIANNESS_MAP(FLOAT_),
2779 ENDIANNESS_MAP(FLOAT64_),
2780 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2781};
2782
2783/*
2784 * Fix up the DAI formats for endianness: codecs don't actually see
2785 * the endianness of the data but we're using the CPU format
2786 * definitions which do need to include endianness so we ensure that
2787 * codec DAIs always have both big and little endian variants set.
2788 */
2789static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2790{
2791 int i;
2792
2793 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2794 if (stream->formats & endianness_format_map[i])
2795 stream->formats |= endianness_format_map[i];
2796}
2797
2798static void snd_soc_try_rebind_card(void)
2799{
2800 struct snd_soc_card *card, *c;
2801
2802 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2803 if (!snd_soc_bind_card(card))
2804 list_del(&card->list);
2805}
2806
2807int snd_soc_add_component(struct device *dev,
2808 struct snd_soc_component *component,
2809 const struct snd_soc_component_driver *component_driver,
2810 struct snd_soc_dai_driver *dai_drv,
2811 int num_dai)
2812{
2813 int ret;
2814 int i;
2815
2816 ret = snd_soc_component_initialize(component, component_driver, dev);
2817 if (ret)
2818 goto err_free;
2819
2820 if (component_driver->endianness) {
2821 for (i = 0; i < num_dai; i++) {
2822 convert_endianness_formats(&dai_drv[i].playback);
2823 convert_endianness_formats(&dai_drv[i].capture);
2824 }
2825 }
2826
2827 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2828 if (ret < 0) {
2829 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2830 goto err_cleanup;
2831 }
2832
2833 snd_soc_component_add(component);
2834 snd_soc_try_rebind_card();
2835
2836 return 0;
2837
2838err_cleanup:
2839 snd_soc_component_cleanup(component);
2840err_free:
2841 return ret;
2842}
2843EXPORT_SYMBOL_GPL(snd_soc_add_component);
2844
2845int snd_soc_register_component(struct device *dev,
2846 const struct snd_soc_component_driver *component_driver,
2847 struct snd_soc_dai_driver *dai_drv,
2848 int num_dai)
2849{
2850 struct snd_soc_component *component;
2851
2852 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2853 if (!component)
2854 return -ENOMEM;
2855
2856 return snd_soc_add_component(dev, component, component_driver,
2857 dai_drv, num_dai);
2858}
2859EXPORT_SYMBOL_GPL(snd_soc_register_component);
2860
2861/**
2862 * snd_soc_unregister_component - Unregister all related component
2863 * from the ASoC core
2864 *
2865 * @dev: The device to unregister
2866 */
2867static int __snd_soc_unregister_component(struct device *dev)
2868{
2869 struct snd_soc_component *component;
2870 int found = 0;
2871
2872 mutex_lock(&client_mutex);
2873 for_each_component(component) {
2874 if (dev != component->dev)
2875 continue;
2876
2877 snd_soc_tplg_component_remove(component,
2878 SND_SOC_TPLG_INDEX_ALL);
2879 snd_soc_component_del_unlocked(component);
2880 found = 1;
2881 break;
2882 }
2883 mutex_unlock(&client_mutex);
2884
2885 if (found)
2886 snd_soc_component_cleanup(component);
2887
2888 return found;
2889}
2890
2891void snd_soc_unregister_component(struct device *dev)
2892{
2893 while (__snd_soc_unregister_component(dev))
2894 ;
2895}
2896EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2897
2898struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
2899 const char *driver_name)
2900{
2901 struct snd_soc_component *component;
2902 struct snd_soc_component *ret;
2903
2904 ret = NULL;
2905 mutex_lock(&client_mutex);
2906 for_each_component(component) {
2907 if (dev != component->dev)
2908 continue;
2909
2910 if (driver_name &&
2911 (driver_name != component->driver->name) &&
2912 (strcmp(component->driver->name, driver_name) != 0))
2913 continue;
2914
2915 ret = component;
2916 break;
2917 }
2918 mutex_unlock(&client_mutex);
2919
2920 return ret;
2921}
2922EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
2923
2924/* Retrieve a card's name from device tree */
2925int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2926 const char *propname)
2927{
2928 struct device_node *np;
2929 int ret;
2930
2931 if (!card->dev) {
2932 pr_err("card->dev is not set before calling %s\n", __func__);
2933 return -EINVAL;
2934 }
2935
2936 np = card->dev->of_node;
2937
2938 ret = of_property_read_string_index(np, propname, 0, &card->name);
2939 /*
2940 * EINVAL means the property does not exist. This is fine providing
2941 * card->name was previously set, which is checked later in
2942 * snd_soc_register_card.
2943 */
2944 if (ret < 0 && ret != -EINVAL) {
2945 dev_err(card->dev,
2946 "ASoC: Property '%s' could not be read: %d\n",
2947 propname, ret);
2948 return ret;
2949 }
2950
2951 return 0;
2952}
2953EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2954
2955static const struct snd_soc_dapm_widget simple_widgets[] = {
2956 SND_SOC_DAPM_MIC("Microphone", NULL),
2957 SND_SOC_DAPM_LINE("Line", NULL),
2958 SND_SOC_DAPM_HP("Headphone", NULL),
2959 SND_SOC_DAPM_SPK("Speaker", NULL),
2960};
2961
2962int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2963 const char *propname)
2964{
2965 struct device_node *np = card->dev->of_node;
2966 struct snd_soc_dapm_widget *widgets;
2967 const char *template, *wname;
2968 int i, j, num_widgets, ret;
2969
2970 num_widgets = of_property_count_strings(np, propname);
2971 if (num_widgets < 0) {
2972 dev_err(card->dev,
2973 "ASoC: Property '%s' does not exist\n", propname);
2974 return -EINVAL;
2975 }
2976 if (num_widgets & 1) {
2977 dev_err(card->dev,
2978 "ASoC: Property '%s' length is not even\n", propname);
2979 return -EINVAL;
2980 }
2981
2982 num_widgets /= 2;
2983 if (!num_widgets) {
2984 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2985 propname);
2986 return -EINVAL;
2987 }
2988
2989 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2990 GFP_KERNEL);
2991 if (!widgets) {
2992 dev_err(card->dev,
2993 "ASoC: Could not allocate memory for widgets\n");
2994 return -ENOMEM;
2995 }
2996
2997 for (i = 0; i < num_widgets; i++) {
2998 ret = of_property_read_string_index(np, propname,
2999 2 * i, &template);
3000 if (ret) {
3001 dev_err(card->dev,
3002 "ASoC: Property '%s' index %d read error:%d\n",
3003 propname, 2 * i, ret);
3004 return -EINVAL;
3005 }
3006
3007 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3008 if (!strncmp(template, simple_widgets[j].name,
3009 strlen(simple_widgets[j].name))) {
3010 widgets[i] = simple_widgets[j];
3011 break;
3012 }
3013 }
3014
3015 if (j >= ARRAY_SIZE(simple_widgets)) {
3016 dev_err(card->dev,
3017 "ASoC: DAPM widget '%s' is not supported\n",
3018 template);
3019 return -EINVAL;
3020 }
3021
3022 ret = of_property_read_string_index(np, propname,
3023 (2 * i) + 1,
3024 &wname);
3025 if (ret) {
3026 dev_err(card->dev,
3027 "ASoC: Property '%s' index %d read error:%d\n",
3028 propname, (2 * i) + 1, ret);
3029 return -EINVAL;
3030 }
3031
3032 widgets[i].name = wname;
3033 }
3034
3035 card->of_dapm_widgets = widgets;
3036 card->num_of_dapm_widgets = num_widgets;
3037
3038 return 0;
3039}
3040EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3041
3042int snd_soc_of_get_slot_mask(struct device_node *np,
3043 const char *prop_name,
3044 unsigned int *mask)
3045{
3046 u32 val;
3047 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3048 int i;
3049
3050 if (!of_slot_mask)
3051 return 0;
3052 val /= sizeof(u32);
3053 for (i = 0; i < val; i++)
3054 if (be32_to_cpup(&of_slot_mask[i]))
3055 *mask |= (1 << i);
3056
3057 return val;
3058}
3059EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3060
3061int snd_soc_of_parse_tdm_slot(struct device_node *np,
3062 unsigned int *tx_mask,
3063 unsigned int *rx_mask,
3064 unsigned int *slots,
3065 unsigned int *slot_width)
3066{
3067 u32 val;
3068 int ret;
3069
3070 if (tx_mask)
3071 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3072 if (rx_mask)
3073 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3074
3075 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3076 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3077 if (ret)
3078 return ret;
3079
3080 if (slots)
3081 *slots = val;
3082 }
3083
3084 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3085 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3086 if (ret)
3087 return ret;
3088
3089 if (slot_width)
3090 *slot_width = val;
3091 }
3092
3093 return 0;
3094}
3095EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3096
3097void snd_soc_of_parse_node_prefix(struct device_node *np,
3098 struct snd_soc_codec_conf *codec_conf,
3099 struct device_node *of_node,
3100 const char *propname)
3101{
3102 const char *str;
3103 int ret;
3104
3105 ret = of_property_read_string(np, propname, &str);
3106 if (ret < 0) {
3107 /* no prefix is not error */
3108 return;
3109 }
3110
3111 codec_conf->of_node = of_node;
3112 codec_conf->name_prefix = str;
3113}
3114EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3115
3116int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3117 const char *propname)
3118{
3119 struct device_node *np = card->dev->of_node;
3120 int num_routes;
3121 struct snd_soc_dapm_route *routes;
3122 int i, ret;
3123
3124 num_routes = of_property_count_strings(np, propname);
3125 if (num_routes < 0 || num_routes & 1) {
3126 dev_err(card->dev,
3127 "ASoC: Property '%s' does not exist or its length is not even\n",
3128 propname);
3129 return -EINVAL;
3130 }
3131 num_routes /= 2;
3132 if (!num_routes) {
3133 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3134 propname);
3135 return -EINVAL;
3136 }
3137
3138 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3139 GFP_KERNEL);
3140 if (!routes) {
3141 dev_err(card->dev,
3142 "ASoC: Could not allocate DAPM route table\n");
3143 return -EINVAL;
3144 }
3145
3146 for (i = 0; i < num_routes; i++) {
3147 ret = of_property_read_string_index(np, propname,
3148 2 * i, &routes[i].sink);
3149 if (ret) {
3150 dev_err(card->dev,
3151 "ASoC: Property '%s' index %d could not be read: %d\n",
3152 propname, 2 * i, ret);
3153 return -EINVAL;
3154 }
3155 ret = of_property_read_string_index(np, propname,
3156 (2 * i) + 1, &routes[i].source);
3157 if (ret) {
3158 dev_err(card->dev,
3159 "ASoC: Property '%s' index %d could not be read: %d\n",
3160 propname, (2 * i) + 1, ret);
3161 return -EINVAL;
3162 }
3163 }
3164
3165 card->num_of_dapm_routes = num_routes;
3166 card->of_dapm_routes = routes;
3167
3168 return 0;
3169}
3170EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3171
3172unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3173 const char *prefix,
3174 struct device_node **bitclkmaster,
3175 struct device_node **framemaster)
3176{
3177 int ret, i;
3178 char prop[128];
3179 unsigned int format = 0;
3180 int bit, frame;
3181 const char *str;
3182 struct {
3183 char *name;
3184 unsigned int val;
3185 } of_fmt_table[] = {
3186 { "i2s", SND_SOC_DAIFMT_I2S },
3187 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3188 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3189 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3190 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3191 { "ac97", SND_SOC_DAIFMT_AC97 },
3192 { "pdm", SND_SOC_DAIFMT_PDM},
3193 { "msb", SND_SOC_DAIFMT_MSB },
3194 { "lsb", SND_SOC_DAIFMT_LSB },
3195 };
3196
3197 if (!prefix)
3198 prefix = "";
3199
3200 /*
3201 * check "dai-format = xxx"
3202 * or "[prefix]format = xxx"
3203 * SND_SOC_DAIFMT_FORMAT_MASK area
3204 */
3205 ret = of_property_read_string(np, "dai-format", &str);
3206 if (ret < 0) {
3207 snprintf(prop, sizeof(prop), "%sformat", prefix);
3208 ret = of_property_read_string(np, prop, &str);
3209 }
3210 if (ret == 0) {
3211 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3212 if (strcmp(str, of_fmt_table[i].name) == 0) {
3213 format |= of_fmt_table[i].val;
3214 break;
3215 }
3216 }
3217 }
3218
3219 /*
3220 * check "[prefix]continuous-clock"
3221 * SND_SOC_DAIFMT_CLOCK_MASK area
3222 */
3223 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3224 if (of_property_read_bool(np, prop))
3225 format |= SND_SOC_DAIFMT_CONT;
3226 else
3227 format |= SND_SOC_DAIFMT_GATED;
3228
3229 /*
3230 * check "[prefix]bitclock-inversion"
3231 * check "[prefix]frame-inversion"
3232 * SND_SOC_DAIFMT_INV_MASK area
3233 */
3234 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3235 bit = !!of_get_property(np, prop, NULL);
3236
3237 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3238 frame = !!of_get_property(np, prop, NULL);
3239
3240 switch ((bit << 4) + frame) {
3241 case 0x11:
3242 format |= SND_SOC_DAIFMT_IB_IF;
3243 break;
3244 case 0x10:
3245 format |= SND_SOC_DAIFMT_IB_NF;
3246 break;
3247 case 0x01:
3248 format |= SND_SOC_DAIFMT_NB_IF;
3249 break;
3250 default:
3251 /* SND_SOC_DAIFMT_NB_NF is default */
3252 break;
3253 }
3254
3255 /*
3256 * check "[prefix]bitclock-master"
3257 * check "[prefix]frame-master"
3258 * SND_SOC_DAIFMT_MASTER_MASK area
3259 */
3260 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3261 bit = !!of_get_property(np, prop, NULL);
3262 if (bit && bitclkmaster)
3263 *bitclkmaster = of_parse_phandle(np, prop, 0);
3264
3265 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3266 frame = !!of_get_property(np, prop, NULL);
3267 if (frame && framemaster)
3268 *framemaster = of_parse_phandle(np, prop, 0);
3269
3270 switch ((bit << 4) + frame) {
3271 case 0x11:
3272 format |= SND_SOC_DAIFMT_CBM_CFM;
3273 break;
3274 case 0x10:
3275 format |= SND_SOC_DAIFMT_CBM_CFS;
3276 break;
3277 case 0x01:
3278 format |= SND_SOC_DAIFMT_CBS_CFM;
3279 break;
3280 default:
3281 format |= SND_SOC_DAIFMT_CBS_CFS;
3282 break;
3283 }
3284
3285 return format;
3286}
3287EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3288
3289int snd_soc_get_dai_id(struct device_node *ep)
3290{
3291 struct snd_soc_component *component;
3292 struct snd_soc_dai_link_component dlc;
3293 int ret;
3294
3295 dlc.of_node = of_graph_get_port_parent(ep);
3296 dlc.name = NULL;
3297 /*
3298 * For example HDMI case, HDMI has video/sound port,
3299 * but ALSA SoC needs sound port number only.
3300 * Thus counting HDMI DT port/endpoint doesn't work.
3301 * Then, it should have .of_xlate_dai_id
3302 */
3303 ret = -ENOTSUPP;
3304 mutex_lock(&client_mutex);
3305 component = soc_find_component(&dlc);
3306 if (component)
3307 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3308 mutex_unlock(&client_mutex);
3309
3310 of_node_put(dlc.of_node);
3311
3312 return ret;
3313}
3314EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3315
3316int snd_soc_get_dai_name(struct of_phandle_args *args,
3317 const char **dai_name)
3318{
3319 struct snd_soc_component *pos;
3320 struct device_node *component_of_node;
3321 int ret = -EPROBE_DEFER;
3322
3323 mutex_lock(&client_mutex);
3324 for_each_component(pos) {
3325 component_of_node = soc_component_to_node(pos);
3326
3327 if (component_of_node != args->np)
3328 continue;
3329
3330 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3331 if (ret == -ENOTSUPP) {
3332 struct snd_soc_dai *dai;
3333 int id = -1;
3334
3335 switch (args->args_count) {
3336 case 0:
3337 id = 0; /* same as dai_drv[0] */
3338 break;
3339 case 1:
3340 id = args->args[0];
3341 break;
3342 default:
3343 /* not supported */
3344 break;
3345 }
3346
3347 if (id < 0 || id >= pos->num_dai) {
3348 ret = -EINVAL;
3349 continue;
3350 }
3351
3352 ret = 0;
3353
3354 /* find target DAI */
3355 for_each_component_dais(pos, dai) {
3356 if (id == 0)
3357 break;
3358 id--;
3359 }
3360
3361 *dai_name = dai->driver->name;
3362 if (!*dai_name)
3363 *dai_name = pos->name;
3364 }
3365
3366 break;
3367 }
3368 mutex_unlock(&client_mutex);
3369 return ret;
3370}
3371EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3372
3373int snd_soc_of_get_dai_name(struct device_node *of_node,
3374 const char **dai_name)
3375{
3376 struct of_phandle_args args;
3377 int ret;
3378
3379 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3380 "#sound-dai-cells", 0, &args);
3381 if (ret)
3382 return ret;
3383
3384 ret = snd_soc_get_dai_name(&args, dai_name);
3385
3386 of_node_put(args.np);
3387
3388 return ret;
3389}
3390EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3391
3392/*
3393 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3394 * @dai_link: DAI link
3395 *
3396 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3397 */
3398void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3399{
3400 struct snd_soc_dai_link_component *component;
3401 int index;
3402
3403 for_each_link_codecs(dai_link, index, component) {
3404 if (!component->of_node)
3405 break;
3406 of_node_put(component->of_node);
3407 component->of_node = NULL;
3408 }
3409}
3410EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3411
3412/*
3413 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3414 * @dev: Card device
3415 * @of_node: Device node
3416 * @dai_link: DAI link
3417 *
3418 * Builds an array of CODEC DAI components from the DAI link property
3419 * 'sound-dai'.
3420 * The array is set in the DAI link and the number of DAIs is set accordingly.
3421 * The device nodes in the array (of_node) must be dereferenced by calling
3422 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3423 *
3424 * Returns 0 for success
3425 */
3426int snd_soc_of_get_dai_link_codecs(struct device *dev,
3427 struct device_node *of_node,
3428 struct snd_soc_dai_link *dai_link)
3429{
3430 struct of_phandle_args args;
3431 struct snd_soc_dai_link_component *component;
3432 char *name;
3433 int index, num_codecs, ret;
3434
3435 /* Count the number of CODECs */
3436 name = "sound-dai";
3437 num_codecs = of_count_phandle_with_args(of_node, name,
3438 "#sound-dai-cells");
3439 if (num_codecs <= 0) {
3440 if (num_codecs == -ENOENT)
3441 dev_err(dev, "No 'sound-dai' property\n");
3442 else
3443 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3444 return num_codecs;
3445 }
3446 component = devm_kcalloc(dev,
3447 num_codecs, sizeof(*component),
3448 GFP_KERNEL);
3449 if (!component)
3450 return -ENOMEM;
3451 dai_link->codecs = component;
3452 dai_link->num_codecs = num_codecs;
3453
3454 /* Parse the list */
3455 for_each_link_codecs(dai_link, index, component) {
3456 ret = of_parse_phandle_with_args(of_node, name,
3457 "#sound-dai-cells",
3458 index, &args);
3459 if (ret)
3460 goto err;
3461 component->of_node = args.np;
3462 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3463 if (ret < 0)
3464 goto err;
3465 }
3466 return 0;
3467err:
3468 snd_soc_of_put_dai_link_codecs(dai_link);
3469 dai_link->codecs = NULL;
3470 dai_link->num_codecs = 0;
3471 return ret;
3472}
3473EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3474
3475static int __init snd_soc_init(void)
3476{
3477 snd_soc_debugfs_init();
3478 snd_soc_util_init();
3479
3480 return platform_driver_register(&soc_driver);
3481}
3482module_init(snd_soc_init);
3483
3484static void __exit snd_soc_exit(void)
3485{
3486 snd_soc_util_exit();
3487 snd_soc_debugfs_exit();
3488
3489 platform_driver_unregister(&soc_driver);
3490}
3491module_exit(snd_soc_exit);
3492
3493/* Module information */
3494MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3495MODULE_DESCRIPTION("ALSA SoC Core");
3496MODULE_LICENSE("GPL");
3497MODULE_ALIAS("platform:soc-audio");