?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
[linux/fpc-iii.git] / sound / soc / soc-core.c
blob3a4a5c0e3f9737c795f74367b04c9825462651f8
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
52 struct dentry *snd_soc_debugfs_root;
53 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
54 #endif
55
56 static DEFINE_MUTEX(client_mutex);
57 static LIST_HEAD(platform_list);
58 static LIST_HEAD(codec_list);
59 static 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 */
66 static int pmdown_time = 5000;
67 module_param(pmdown_time, int, 0);
68 MODULE_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 */
72 static 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' */
90 static 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 */
115 static 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
152 static 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
160 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
161
162 static 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
170 static 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
184 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
185
186 static struct attribute *soc_dev_attrs[] = {
187 &dev_attr_codec_reg.attr,
188 &dev_attr_pmdown_time.attr,
189 NULL
190 };
191
192 static 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
203 static const struct attribute_group soc_dapm_dev_group = {
204 .attrs = soc_dapm_dev_attrs,
205 .is_visible = soc_dev_attr_is_visible,
206 };
207
208 static const struct attribute_group soc_dev_roup = {
209 .attrs = soc_dev_attrs,
210 .is_visible = soc_dev_attr_is_visible,
211 };
212
213 static 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
220 static 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
247 static 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
278 static 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
285 static 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
318 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
319 {
320 debugfs_remove_recursive(component->debugfs_root);
321 }
322
323 static 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
335 static 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
368 static const struct file_operations codec_list_fops = {
369 .read = codec_list_read_file,
370 .llseek = default_llseek,/* read accesses f_pos */
371 };
372
373 static 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
408 static const struct file_operations dai_list_fops = {
409 .read = dai_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
411 };
412
413 static 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
446 static const struct file_operations platform_list_fops = {
447 .read = platform_list_read_file,
448 .llseek = default_llseek,/* read accesses f_pos */
449 };
450
451 static 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
472 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
473 {
474 debugfs_remove_recursive(card->debugfs_card_root);
475 }
476
477
478 static 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
500 static 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
509 static inline void soc_init_component_debugfs(
510 struct snd_soc_component *component)
511 {
512 }
513
514 static inline void soc_cleanup_component_debugfs(
515 struct snd_soc_component *component)
516 {
517 }
518
519 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
520 {
521 }
522
523 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
524 {
525 }
526
527 static inline void snd_soc_debugfs_init(void)
528 {
529 }
530
531 static inline void snd_soc_debugfs_exit(void)
532 {
533 }
534
535 #endif
536
537 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
538 const char *dai_link, int stream)
539 {
540 int i;
541
542 for (i = 0; i < card->num_links; i++) {
543 if (card->rtd[i].dai_link->no_pcm &&
544 !strcmp(card->rtd[i].dai_link->name, dai_link))
545 return card->rtd[i].pcm->streams[stream].substream;
546 }
547 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
548 return NULL;
549 }
550 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
551
552 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
553 const char *dai_link)
554 {
555 int i;
556
557 for (i = 0; i < card->num_links; i++) {
558 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
559 return &card->rtd[i];
560 }
561 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
562 return NULL;
563 }
564 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
565
566 static void codec2codec_close_delayed_work(struct work_struct *work)
567 {
568 /* Currently nothing to do for c2c links
569 * Since c2c links are internal nodes in the DAPM graph and
570 * don't interface with the outside world or application layer
571 * we don't have to do any special handling on close.
572 */
573 }
574
575 #ifdef CONFIG_PM_SLEEP
576 /* powers down audio subsystem for suspend */
577 int snd_soc_suspend(struct device *dev)
578 {
579 struct snd_soc_card *card = dev_get_drvdata(dev);
580 struct snd_soc_codec *codec;
581 int i, j;
582
583 /* If the card is not initialized yet there is nothing to do */
584 if (!card->instantiated)
585 return 0;
586
587 /* Due to the resume being scheduled into a workqueue we could
588 * suspend before that's finished - wait for it to complete.
589 */
590 snd_power_lock(card->snd_card);
591 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
592 snd_power_unlock(card->snd_card);
593
594 /* we're going to block userspace touching us until resume completes */
595 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
596
597 /* mute any active DACs */
598 for (i = 0; i < card->num_rtd; i++) {
599
600 if (card->rtd[i].dai_link->ignore_suspend)
601 continue;
602
603 for (j = 0; j < card->rtd[i].num_codecs; j++) {
604 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
605 struct snd_soc_dai_driver *drv = dai->driver;
606
607 if (drv->ops->digital_mute && dai->playback_active)
608 drv->ops->digital_mute(dai, 1);
609 }
610 }
611
612 /* suspend all pcms */
613 for (i = 0; i < card->num_rtd; i++) {
614 if (card->rtd[i].dai_link->ignore_suspend)
615 continue;
616
617 snd_pcm_suspend_all(card->rtd[i].pcm);
618 }
619
620 if (card->suspend_pre)
621 card->suspend_pre(card);
622
623 for (i = 0; i < card->num_rtd; i++) {
624 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
625
626 if (card->rtd[i].dai_link->ignore_suspend)
627 continue;
628
629 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
630 cpu_dai->driver->suspend(cpu_dai);
631 }
632
633 /* close any waiting streams */
634 for (i = 0; i < card->num_rtd; i++)
635 flush_delayed_work(&card->rtd[i].delayed_work);
636
637 for (i = 0; i < card->num_rtd; i++) {
638
639 if (card->rtd[i].dai_link->ignore_suspend)
640 continue;
641
642 snd_soc_dapm_stream_event(&card->rtd[i],
643 SNDRV_PCM_STREAM_PLAYBACK,
644 SND_SOC_DAPM_STREAM_SUSPEND);
645
646 snd_soc_dapm_stream_event(&card->rtd[i],
647 SNDRV_PCM_STREAM_CAPTURE,
648 SND_SOC_DAPM_STREAM_SUSPEND);
649 }
650
651 /* Recheck all endpoints too, their state is affected by suspend */
652 dapm_mark_endpoints_dirty(card);
653 snd_soc_dapm_sync(&card->dapm);
654
655 /* suspend all CODECs */
656 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
657 /* If there are paths active then the CODEC will be held with
658 * bias _ON and should not be suspended. */
659 if (!codec->suspended) {
660 switch (codec->dapm.bias_level) {
661 case SND_SOC_BIAS_STANDBY:
662 /*
663 * If the CODEC is capable of idle
664 * bias off then being in STANDBY
665 * means it's doing something,
666 * otherwise fall through.
667 */
668 if (codec->dapm.idle_bias_off) {
669 dev_dbg(codec->dev,
670 "ASoC: idle_bias_off CODEC on over suspend\n");
671 break;
672 }
673
674 case SND_SOC_BIAS_OFF:
675 if (codec->driver->suspend)
676 codec->driver->suspend(codec);
677 codec->suspended = 1;
678 if (codec->component.regmap)
679 regcache_mark_dirty(codec->component.regmap);
680 /* deactivate pins to sleep state */
681 pinctrl_pm_select_sleep_state(codec->dev);
682 break;
683 default:
684 dev_dbg(codec->dev,
685 "ASoC: CODEC is on over suspend\n");
686 break;
687 }
688 }
689 }
690
691 for (i = 0; i < card->num_rtd; i++) {
692 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
693
694 if (card->rtd[i].dai_link->ignore_suspend)
695 continue;
696
697 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
698 cpu_dai->driver->suspend(cpu_dai);
699
700 /* deactivate pins to sleep state */
701 pinctrl_pm_select_sleep_state(cpu_dai->dev);
702 }
703
704 if (card->suspend_post)
705 card->suspend_post(card);
706
707 return 0;
708 }
709 EXPORT_SYMBOL_GPL(snd_soc_suspend);
710
711 /* deferred resume work, so resume can complete before we finished
712 * setting our codec back up, which can be very slow on I2C
713 */
714 static void soc_resume_deferred(struct work_struct *work)
715 {
716 struct snd_soc_card *card =
717 container_of(work, struct snd_soc_card, deferred_resume_work);
718 struct snd_soc_codec *codec;
719 int i, j;
720
721 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
722 * so userspace apps are blocked from touching us
723 */
724
725 dev_dbg(card->dev, "ASoC: starting resume work\n");
726
727 /* Bring us up into D2 so that DAPM starts enabling things */
728 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
729
730 if (card->resume_pre)
731 card->resume_pre(card);
732
733 /* resume control bus DAIs */
734 for (i = 0; i < card->num_rtd; i++) {
735 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
736
737 if (card->rtd[i].dai_link->ignore_suspend)
738 continue;
739
740 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
741 cpu_dai->driver->resume(cpu_dai);
742 }
743
744 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
745 if (codec->suspended) {
746 if (codec->driver->resume)
747 codec->driver->resume(codec);
748 codec->suspended = 0;
749 }
750 }
751
752 for (i = 0; i < card->num_rtd; i++) {
753
754 if (card->rtd[i].dai_link->ignore_suspend)
755 continue;
756
757 snd_soc_dapm_stream_event(&card->rtd[i],
758 SNDRV_PCM_STREAM_PLAYBACK,
759 SND_SOC_DAPM_STREAM_RESUME);
760
761 snd_soc_dapm_stream_event(&card->rtd[i],
762 SNDRV_PCM_STREAM_CAPTURE,
763 SND_SOC_DAPM_STREAM_RESUME);
764 }
765
766 /* unmute any active DACs */
767 for (i = 0; i < card->num_rtd; i++) {
768
769 if (card->rtd[i].dai_link->ignore_suspend)
770 continue;
771
772 for (j = 0; j < card->rtd[i].num_codecs; j++) {
773 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
774 struct snd_soc_dai_driver *drv = dai->driver;
775
776 if (drv->ops->digital_mute && dai->playback_active)
777 drv->ops->digital_mute(dai, 0);
778 }
779 }
780
781 for (i = 0; i < card->num_rtd; i++) {
782 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
783
784 if (card->rtd[i].dai_link->ignore_suspend)
785 continue;
786
787 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
788 cpu_dai->driver->resume(cpu_dai);
789 }
790
791 if (card->resume_post)
792 card->resume_post(card);
793
794 dev_dbg(card->dev, "ASoC: resume work completed\n");
795
796 /* userspace can access us now we are back as we were before */
797 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
798
799 /* Recheck all endpoints too, their state is affected by suspend */
800 dapm_mark_endpoints_dirty(card);
801 snd_soc_dapm_sync(&card->dapm);
802 }
803
804 /* powers up audio subsystem after a suspend */
805 int snd_soc_resume(struct device *dev)
806 {
807 struct snd_soc_card *card = dev_get_drvdata(dev);
808 bool bus_control = false;
809 int i;
810
811 /* If the card is not initialized yet there is nothing to do */
812 if (!card->instantiated)
813 return 0;
814
815 /* activate pins from sleep state */
816 for (i = 0; i < card->num_rtd; i++) {
817 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
818 struct snd_soc_dai **codec_dais = rtd->codec_dais;
819 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
820 int j;
821
822 if (cpu_dai->active)
823 pinctrl_pm_select_default_state(cpu_dai->dev);
824
825 for (j = 0; j < rtd->num_codecs; j++) {
826 struct snd_soc_dai *codec_dai = codec_dais[j];
827 if (codec_dai->active)
828 pinctrl_pm_select_default_state(codec_dai->dev);
829 }
830 }
831
832 /*
833 * DAIs that also act as the control bus master might have other drivers
834 * hanging off them so need to resume immediately. Other drivers don't
835 * have that problem and may take a substantial amount of time to resume
836 * due to I/O costs and anti-pop so handle them out of line.
837 */
838 for (i = 0; i < card->num_rtd; i++) {
839 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
840 bus_control |= cpu_dai->driver->bus_control;
841 }
842 if (bus_control) {
843 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
844 soc_resume_deferred(&card->deferred_resume_work);
845 } else {
846 dev_dbg(dev, "ASoC: Scheduling resume work\n");
847 if (!schedule_work(&card->deferred_resume_work))
848 dev_err(dev, "ASoC: resume work item may be lost\n");
849 }
850
851 return 0;
852 }
853 EXPORT_SYMBOL_GPL(snd_soc_resume);
854 #else
855 #define snd_soc_suspend NULL
856 #define snd_soc_resume NULL
857 #endif
858
859 static const struct snd_soc_dai_ops null_dai_ops = {
860 };
861
862 static struct snd_soc_component *soc_find_component(
863 const struct device_node *of_node, const char *name)
864 {
865 struct snd_soc_component *component;
866
867 lockdep_assert_held(&client_mutex);
868
869 list_for_each_entry(component, &component_list, list) {
870 if (of_node) {
871 if (component->dev->of_node == of_node)
872 return component;
873 } else if (strcmp(component->name, name) == 0) {
874 return component;
875 }
876 }
877
878 return NULL;
879 }
880
881 static struct snd_soc_dai *snd_soc_find_dai(
882 const struct snd_soc_dai_link_component *dlc)
883 {
884 struct snd_soc_component *component;
885 struct snd_soc_dai *dai;
886 struct device_node *component_of_node;
887
888 lockdep_assert_held(&client_mutex);
889
890 /* Find CPU DAI from registered DAIs*/
891 list_for_each_entry(component, &component_list, list) {
892 component_of_node = component->dev->of_node;
893 if (!component_of_node && component->dev->parent)
894 component_of_node = component->dev->parent->of_node;
895
896 if (dlc->of_node && component_of_node != dlc->of_node)
897 continue;
898 if (dlc->name && strcmp(component->name, dlc->name))
899 continue;
900 list_for_each_entry(dai, &component->dai_list, list) {
901 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
902 continue;
903
904 return dai;
905 }
906 }
907
908 return NULL;
909 }
910
911 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
912 {
913 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
914 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
915 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
916 struct snd_soc_dai_link_component cpu_dai_component;
917 struct snd_soc_dai **codec_dais = rtd->codec_dais;
918 struct snd_soc_platform *platform;
919 const char *platform_name;
920 int i;
921
922 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
923
924 cpu_dai_component.name = dai_link->cpu_name;
925 cpu_dai_component.of_node = dai_link->cpu_of_node;
926 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
927 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
928 if (!rtd->cpu_dai) {
929 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
930 dai_link->cpu_dai_name);
931 return -EPROBE_DEFER;
932 }
933
934 rtd->num_codecs = dai_link->num_codecs;
935
936 /* Find CODEC from registered CODECs */
937 for (i = 0; i < rtd->num_codecs; i++) {
938 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
939 if (!codec_dais[i]) {
940 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
941 codecs[i].dai_name);
942 return -EPROBE_DEFER;
943 }
944 }
945
946 /* Single codec links expect codec and codec_dai in runtime data */
947 rtd->codec_dai = codec_dais[0];
948 rtd->codec = rtd->codec_dai->codec;
949
950 /* if there's no platform we match on the empty platform */
951 platform_name = dai_link->platform_name;
952 if (!platform_name && !dai_link->platform_of_node)
953 platform_name = "snd-soc-dummy";
954
955 /* find one from the set of registered platforms */
956 list_for_each_entry(platform, &platform_list, list) {
957 if (dai_link->platform_of_node) {
958 if (platform->dev->of_node !=
959 dai_link->platform_of_node)
960 continue;
961 } else {
962 if (strcmp(platform->component.name, platform_name))
963 continue;
964 }
965
966 rtd->platform = platform;
967 }
968 if (!rtd->platform) {
969 dev_err(card->dev, "ASoC: platform %s not registered\n",
970 dai_link->platform_name);
971 return -EPROBE_DEFER;
972 }
973
974 card->num_rtd++;
975
976 return 0;
977 }
978
979 static void soc_remove_component(struct snd_soc_component *component)
980 {
981 if (!component->probed)
982 return;
983
984 /* This is a HACK and will be removed soon */
985 if (component->codec)
986 list_del(&component->codec->card_list);
987
988 if (component->remove)
989 component->remove(component);
990
991 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
992
993 soc_cleanup_component_debugfs(component);
994 component->probed = 0;
995 module_put(component->dev->driver->owner);
996 }
997
998 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
999 {
1000 int err;
1001
1002 if (dai && dai->probed &&
1003 dai->driver->remove_order == order) {
1004 if (dai->driver->remove) {
1005 err = dai->driver->remove(dai);
1006 if (err < 0)
1007 dev_err(dai->dev,
1008 "ASoC: failed to remove %s: %d\n",
1009 dai->name, err);
1010 }
1011 dai->probed = 0;
1012 }
1013 }
1014
1015 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1016 {
1017 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1018 int i;
1019
1020 /* unregister the rtd device */
1021 if (rtd->dev_registered) {
1022 device_unregister(rtd->dev);
1023 rtd->dev_registered = 0;
1024 }
1025
1026 /* remove the CODEC DAI */
1027 for (i = 0; i < rtd->num_codecs; i++)
1028 soc_remove_dai(rtd->codec_dais[i], order);
1029
1030 soc_remove_dai(rtd->cpu_dai, order);
1031 }
1032
1033 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1034 int order)
1035 {
1036 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038 struct snd_soc_platform *platform = rtd->platform;
1039 struct snd_soc_component *component;
1040 int i;
1041
1042 /* remove the platform */
1043 if (platform && platform->component.driver->remove_order == order)
1044 soc_remove_component(&platform->component);
1045
1046 /* remove the CODEC-side CODEC */
1047 for (i = 0; i < rtd->num_codecs; i++) {
1048 component = rtd->codec_dais[i]->component;
1049 if (component->driver->remove_order == order)
1050 soc_remove_component(component);
1051 }
1052
1053 /* remove any CPU-side CODEC */
1054 if (cpu_dai) {
1055 if (cpu_dai->component->driver->remove_order == order)
1056 soc_remove_component(cpu_dai->component);
1057 }
1058 }
1059
1060 static void soc_remove_dai_links(struct snd_soc_card *card)
1061 {
1062 int dai, order;
1063
1064 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1065 order++) {
1066 for (dai = 0; dai < card->num_rtd; dai++)
1067 soc_remove_link_dais(card, dai, order);
1068 }
1069
1070 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1071 order++) {
1072 for (dai = 0; dai < card->num_rtd; dai++)
1073 soc_remove_link_components(card, dai, order);
1074 }
1075
1076 card->num_rtd = 0;
1077 }
1078
1079 static void soc_set_name_prefix(struct snd_soc_card *card,
1080 struct snd_soc_component *component)
1081 {
1082 int i;
1083
1084 if (card->codec_conf == NULL)
1085 return;
1086
1087 for (i = 0; i < card->num_configs; i++) {
1088 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1089 if (map->of_node && component->dev->of_node != map->of_node)
1090 continue;
1091 if (map->dev_name && strcmp(component->name, map->dev_name))
1092 continue;
1093 component->name_prefix = map->name_prefix;
1094 break;
1095 }
1096 }
1097
1098 static int soc_probe_component(struct snd_soc_card *card,
1099 struct snd_soc_component *component)
1100 {
1101 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1102 struct snd_soc_dai *dai;
1103 int ret;
1104
1105 if (component->probed)
1106 return 0;
1107
1108 component->card = card;
1109 dapm->card = card;
1110 soc_set_name_prefix(card, component);
1111
1112 if (!try_module_get(component->dev->driver->owner))
1113 return -ENODEV;
1114
1115 soc_init_component_debugfs(component);
1116
1117 if (component->dapm_widgets) {
1118 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1119 component->num_dapm_widgets);
1120
1121 if (ret != 0) {
1122 dev_err(component->dev,
1123 "Failed to create new controls %d\n", ret);
1124 goto err_probe;
1125 }
1126 }
1127
1128 list_for_each_entry(dai, &component->dai_list, list) {
1129 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1130 if (ret != 0) {
1131 dev_err(component->dev,
1132 "Failed to create DAI widgets %d\n", ret);
1133 goto err_probe;
1134 }
1135 }
1136
1137 if (component->probe) {
1138 ret = component->probe(component);
1139 if (ret < 0) {
1140 dev_err(component->dev,
1141 "ASoC: failed to probe component %d\n", ret);
1142 goto err_probe;
1143 }
1144
1145 WARN(dapm->idle_bias_off &&
1146 dapm->bias_level != SND_SOC_BIAS_OFF,
1147 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1148 component->name);
1149 }
1150
1151 if (component->controls)
1152 snd_soc_add_component_controls(component, component->controls,
1153 component->num_controls);
1154 if (component->dapm_routes)
1155 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1156 component->num_dapm_routes);
1157
1158 component->probed = 1;
1159 list_add(&dapm->list, &card->dapm_list);
1160
1161 /* This is a HACK and will be removed soon */
1162 if (component->codec)
1163 list_add(&component->codec->card_list, &card->codec_dev_list);
1164
1165 return 0;
1166
1167 err_probe:
1168 soc_cleanup_component_debugfs(component);
1169 module_put(component->dev->driver->owner);
1170
1171 return ret;
1172 }
1173
1174 static void rtd_release(struct device *dev)
1175 {
1176 kfree(dev);
1177 }
1178
1179 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1180 const char *name)
1181 {
1182 int ret = 0;
1183
1184 /* register the rtd device */
1185 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1186 if (!rtd->dev)
1187 return -ENOMEM;
1188 device_initialize(rtd->dev);
1189 rtd->dev->parent = rtd->card->dev;
1190 rtd->dev->release = rtd_release;
1191 rtd->dev->groups = soc_dev_attr_groups;
1192 dev_set_name(rtd->dev, "%s", name);
1193 dev_set_drvdata(rtd->dev, rtd);
1194 mutex_init(&rtd->pcm_mutex);
1195 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1196 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1197 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1198 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1199 ret = device_add(rtd->dev);
1200 if (ret < 0) {
1201 /* calling put_device() here to free the rtd->dev */
1202 put_device(rtd->dev);
1203 dev_err(rtd->card->dev,
1204 "ASoC: failed to register runtime device: %d\n", ret);
1205 return ret;
1206 }
1207 rtd->dev_registered = 1;
1208 return 0;
1209 }
1210
1211 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1212 int order)
1213 {
1214 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1215 struct snd_soc_platform *platform = rtd->platform;
1216 struct snd_soc_component *component;
1217 int i, ret;
1218
1219 /* probe the CPU-side component, if it is a CODEC */
1220 component = rtd->cpu_dai->component;
1221 if (component->driver->probe_order == order) {
1222 ret = soc_probe_component(card, component);
1223 if (ret < 0)
1224 return ret;
1225 }
1226
1227 /* probe the CODEC-side components */
1228 for (i = 0; i < rtd->num_codecs; i++) {
1229 component = rtd->codec_dais[i]->component;
1230 if (component->driver->probe_order == order) {
1231 ret = soc_probe_component(card, component);
1232 if (ret < 0)
1233 return ret;
1234 }
1235 }
1236
1237 /* probe the platform */
1238 if (platform->component.driver->probe_order == order) {
1239 ret = soc_probe_component(card, &platform->component);
1240 if (ret < 0)
1241 return ret;
1242 }
1243
1244 return 0;
1245 }
1246
1247 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1248 {
1249 int ret;
1250
1251 if (!dai->probed && dai->driver->probe_order == order) {
1252 if (dai->driver->probe) {
1253 ret = dai->driver->probe(dai);
1254 if (ret < 0) {
1255 dev_err(dai->dev,
1256 "ASoC: failed to probe DAI %s: %d\n",
1257 dai->name, ret);
1258 return ret;
1259 }
1260 }
1261
1262 dai->probed = 1;
1263 }
1264
1265 return 0;
1266 }
1267
1268 static int soc_link_dai_widgets(struct snd_soc_card *card,
1269 struct snd_soc_dai_link *dai_link,
1270 struct snd_soc_pcm_runtime *rtd)
1271 {
1272 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1273 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1274 struct snd_soc_dapm_widget *play_w, *capture_w;
1275 int ret;
1276
1277 if (rtd->num_codecs > 1)
1278 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1279
1280 /* link the DAI widgets */
1281 play_w = codec_dai->playback_widget;
1282 capture_w = cpu_dai->capture_widget;
1283 if (play_w && capture_w) {
1284 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1285 dai_link->num_params, capture_w,
1286 play_w);
1287 if (ret != 0) {
1288 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1289 play_w->name, capture_w->name, ret);
1290 return ret;
1291 }
1292 }
1293
1294 play_w = cpu_dai->playback_widget;
1295 capture_w = codec_dai->capture_widget;
1296 if (play_w && capture_w) {
1297 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1298 dai_link->num_params, capture_w,
1299 play_w);
1300 if (ret != 0) {
1301 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1302 play_w->name, capture_w->name, ret);
1303 return ret;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1311 {
1312 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1313 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1314 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1315 int i, ret;
1316
1317 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1318 card->name, num, order);
1319
1320 /* set default power off timeout */
1321 rtd->pmdown_time = pmdown_time;
1322
1323 ret = soc_probe_dai(cpu_dai, order);
1324 if (ret)
1325 return ret;
1326
1327 /* probe the CODEC DAI */
1328 for (i = 0; i < rtd->num_codecs; i++) {
1329 ret = soc_probe_dai(rtd->codec_dais[i], order);
1330 if (ret)
1331 return ret;
1332 }
1333
1334 /* complete DAI probe during last probe */
1335 if (order != SND_SOC_COMP_ORDER_LAST)
1336 return 0;
1337
1338 /* do machine specific initialization */
1339 if (dai_link->init) {
1340 ret = dai_link->init(rtd);
1341 if (ret < 0) {
1342 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1343 dai_link->name, ret);
1344 return ret;
1345 }
1346 }
1347
1348 if (dai_link->dai_fmt)
1349 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1350
1351 ret = soc_post_component_init(rtd, dai_link->name);
1352 if (ret)
1353 return ret;
1354
1355 #ifdef CONFIG_DEBUG_FS
1356 /* add DPCM sysfs entries */
1357 if (dai_link->dynamic)
1358 soc_dpcm_debugfs_add(rtd);
1359 #endif
1360
1361 if (cpu_dai->driver->compress_dai) {
1362 /*create compress_device"*/
1363 ret = soc_new_compress(rtd, num);
1364 if (ret < 0) {
1365 dev_err(card->dev, "ASoC: can't create compress %s\n",
1366 dai_link->stream_name);
1367 return ret;
1368 }
1369 } else {
1370
1371 if (!dai_link->params) {
1372 /* create the pcm */
1373 ret = soc_new_pcm(rtd, num);
1374 if (ret < 0) {
1375 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1376 dai_link->stream_name, ret);
1377 return ret;
1378 }
1379 } else {
1380 INIT_DELAYED_WORK(&rtd->delayed_work,
1381 codec2codec_close_delayed_work);
1382
1383 /* link the DAI widgets */
1384 ret = soc_link_dai_widgets(card, dai_link, rtd);
1385 if (ret)
1386 return ret;
1387 }
1388 }
1389
1390 return 0;
1391 }
1392
1393 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1394 {
1395 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1396 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1397 const char *name = aux_dev->codec_name;
1398
1399 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1400 if (!rtd->component) {
1401 if (aux_dev->codec_of_node)
1402 name = of_node_full_name(aux_dev->codec_of_node);
1403
1404 dev_err(card->dev, "ASoC: %s not registered\n", name);
1405 return -EPROBE_DEFER;
1406 }
1407
1408 /*
1409 * Some places still reference rtd->codec, so we have to keep that
1410 * initialized if the component is a CODEC. Once all those references
1411 * have been removed, this code can be removed as well.
1412 */
1413 rtd->codec = rtd->component->codec;
1414
1415 return 0;
1416 }
1417
1418 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1419 {
1420 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1421 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1422 int ret;
1423
1424 ret = soc_probe_component(card, rtd->component);
1425 if (ret < 0)
1426 return ret;
1427
1428 /* do machine specific initialization */
1429 if (aux_dev->init) {
1430 ret = aux_dev->init(rtd->component);
1431 if (ret < 0) {
1432 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1433 aux_dev->name, ret);
1434 return ret;
1435 }
1436 }
1437
1438 return soc_post_component_init(rtd, aux_dev->name);
1439 }
1440
1441 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1442 {
1443 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1444 struct snd_soc_component *component = rtd->component;
1445
1446 /* unregister the rtd device */
1447 if (rtd->dev_registered) {
1448 device_unregister(rtd->dev);
1449 rtd->dev_registered = 0;
1450 }
1451
1452 if (component && component->probed)
1453 soc_remove_component(component);
1454 }
1455
1456 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1457 {
1458 int ret;
1459
1460 if (codec->cache_init)
1461 return 0;
1462
1463 ret = snd_soc_cache_init(codec);
1464 if (ret < 0) {
1465 dev_err(codec->dev,
1466 "ASoC: Failed to set cache compression type: %d\n",
1467 ret);
1468 return ret;
1469 }
1470 codec->cache_init = 1;
1471 return 0;
1472 }
1473
1474 /**
1475 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1476 * @rtd: The runtime for which the DAI link format should be changed
1477 * @dai_fmt: The new DAI link format
1478 *
1479 * This function updates the DAI link format for all DAIs connected to the DAI
1480 * link for the specified runtime.
1481 *
1482 * Note: For setups with a static format set the dai_fmt field in the
1483 * corresponding snd_dai_link struct instead of using this function.
1484 *
1485 * Returns 0 on success, otherwise a negative error code.
1486 */
1487 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1488 unsigned int dai_fmt)
1489 {
1490 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1491 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1492 unsigned int i;
1493 int ret;
1494
1495 for (i = 0; i < rtd->num_codecs; i++) {
1496 struct snd_soc_dai *codec_dai = codec_dais[i];
1497
1498 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1499 if (ret != 0 && ret != -ENOTSUPP) {
1500 dev_warn(codec_dai->dev,
1501 "ASoC: Failed to set DAI format: %d\n", ret);
1502 return ret;
1503 }
1504 }
1505
1506 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1507 if (cpu_dai->codec) {
1508 unsigned int inv_dai_fmt;
1509
1510 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1511 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1512 case SND_SOC_DAIFMT_CBM_CFM:
1513 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1514 break;
1515 case SND_SOC_DAIFMT_CBM_CFS:
1516 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1517 break;
1518 case SND_SOC_DAIFMT_CBS_CFM:
1519 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1520 break;
1521 case SND_SOC_DAIFMT_CBS_CFS:
1522 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1523 break;
1524 }
1525
1526 dai_fmt = inv_dai_fmt;
1527 }
1528
1529 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1530 if (ret != 0 && ret != -ENOTSUPP) {
1531 dev_warn(cpu_dai->dev,
1532 "ASoC: Failed to set DAI format: %d\n", ret);
1533 return ret;
1534 }
1535
1536 return 0;
1537 }
1538 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1539
1540 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1541 {
1542 struct snd_soc_codec *codec;
1543 int ret, i, order;
1544
1545 mutex_lock(&client_mutex);
1546 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1547
1548 /* bind DAIs */
1549 for (i = 0; i < card->num_links; i++) {
1550 ret = soc_bind_dai_link(card, i);
1551 if (ret != 0)
1552 goto base_error;
1553 }
1554
1555 /* bind aux_devs too */
1556 for (i = 0; i < card->num_aux_devs; i++) {
1557 ret = soc_bind_aux_dev(card, i);
1558 if (ret != 0)
1559 goto base_error;
1560 }
1561
1562 /* initialize the register cache for each available codec */
1563 list_for_each_entry(codec, &codec_list, list) {
1564 if (codec->cache_init)
1565 continue;
1566 ret = snd_soc_init_codec_cache(codec);
1567 if (ret < 0)
1568 goto base_error;
1569 }
1570
1571 /* card bind complete so register a sound card */
1572 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1573 card->owner, 0, &card->snd_card);
1574 if (ret < 0) {
1575 dev_err(card->dev,
1576 "ASoC: can't create sound card for card %s: %d\n",
1577 card->name, ret);
1578 goto base_error;
1579 }
1580
1581 soc_init_card_debugfs(card);
1582
1583 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1584 card->dapm.dev = card->dev;
1585 card->dapm.card = card;
1586 list_add(&card->dapm.list, &card->dapm_list);
1587
1588 #ifdef CONFIG_DEBUG_FS
1589 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1590 #endif
1591
1592 #ifdef CONFIG_PM_SLEEP
1593 /* deferred resume work */
1594 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1595 #endif
1596
1597 if (card->dapm_widgets)
1598 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1599 card->num_dapm_widgets);
1600
1601 if (card->of_dapm_widgets)
1602 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1603 card->num_of_dapm_widgets);
1604
1605 /* initialise the sound card only once */
1606 if (card->probe) {
1607 ret = card->probe(card);
1608 if (ret < 0)
1609 goto card_probe_error;
1610 }
1611
1612 /* probe all components used by DAI links on this card */
1613 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1614 order++) {
1615 for (i = 0; i < card->num_links; i++) {
1616 ret = soc_probe_link_components(card, i, order);
1617 if (ret < 0) {
1618 dev_err(card->dev,
1619 "ASoC: failed to instantiate card %d\n",
1620 ret);
1621 goto probe_dai_err;
1622 }
1623 }
1624 }
1625
1626 /* probe all DAI links on this card */
1627 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1628 order++) {
1629 for (i = 0; i < card->num_links; i++) {
1630 ret = soc_probe_link_dais(card, i, order);
1631 if (ret < 0) {
1632 dev_err(card->dev,
1633 "ASoC: failed to instantiate card %d\n",
1634 ret);
1635 goto probe_dai_err;
1636 }
1637 }
1638 }
1639
1640 for (i = 0; i < card->num_aux_devs; i++) {
1641 ret = soc_probe_aux_dev(card, i);
1642 if (ret < 0) {
1643 dev_err(card->dev,
1644 "ASoC: failed to add auxiliary devices %d\n",
1645 ret);
1646 goto probe_aux_dev_err;
1647 }
1648 }
1649
1650 snd_soc_dapm_link_dai_widgets(card);
1651 snd_soc_dapm_connect_dai_link_widgets(card);
1652
1653 if (card->controls)
1654 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1655
1656 if (card->dapm_routes)
1657 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1658 card->num_dapm_routes);
1659
1660 if (card->of_dapm_routes)
1661 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1662 card->num_of_dapm_routes);
1663
1664 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1665 "%s", card->name);
1666 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1667 "%s", card->long_name ? card->long_name : card->name);
1668 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1669 "%s", card->driver_name ? card->driver_name : card->name);
1670 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1671 switch (card->snd_card->driver[i]) {
1672 case '_':
1673 case '-':
1674 case '\0':
1675 break;
1676 default:
1677 if (!isalnum(card->snd_card->driver[i]))
1678 card->snd_card->driver[i] = '_';
1679 break;
1680 }
1681 }
1682
1683 if (card->late_probe) {
1684 ret = card->late_probe(card);
1685 if (ret < 0) {
1686 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1687 card->name, ret);
1688 goto probe_aux_dev_err;
1689 }
1690 }
1691
1692 snd_soc_dapm_new_widgets(card);
1693
1694 ret = snd_card_register(card->snd_card);
1695 if (ret < 0) {
1696 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1697 ret);
1698 goto probe_aux_dev_err;
1699 }
1700
1701 card->instantiated = 1;
1702 snd_soc_dapm_sync(&card->dapm);
1703 mutex_unlock(&card->mutex);
1704 mutex_unlock(&client_mutex);
1705
1706 return 0;
1707
1708 probe_aux_dev_err:
1709 for (i = 0; i < card->num_aux_devs; i++)
1710 soc_remove_aux_dev(card, i);
1711
1712 probe_dai_err:
1713 soc_remove_dai_links(card);
1714
1715 card_probe_error:
1716 if (card->remove)
1717 card->remove(card);
1718
1719 soc_cleanup_card_debugfs(card);
1720 snd_card_free(card->snd_card);
1721
1722 base_error:
1723 mutex_unlock(&card->mutex);
1724 mutex_unlock(&client_mutex);
1725
1726 return ret;
1727 }
1728
1729 /* probes a new socdev */
1730 static int soc_probe(struct platform_device *pdev)
1731 {
1732 struct snd_soc_card *card = platform_get_drvdata(pdev);
1733
1734 /*
1735 * no card, so machine driver should be registering card
1736 * we should not be here in that case so ret error
1737 */
1738 if (!card)
1739 return -EINVAL;
1740
1741 dev_warn(&pdev->dev,
1742 "ASoC: machine %s should use snd_soc_register_card()\n",
1743 card->name);
1744
1745 /* Bodge while we unpick instantiation */
1746 card->dev = &pdev->dev;
1747
1748 return snd_soc_register_card(card);
1749 }
1750
1751 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1752 {
1753 int i;
1754
1755 /* make sure any delayed work runs */
1756 for (i = 0; i < card->num_rtd; i++) {
1757 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1758 flush_delayed_work(&rtd->delayed_work);
1759 }
1760
1761 /* remove auxiliary devices */
1762 for (i = 0; i < card->num_aux_devs; i++)
1763 soc_remove_aux_dev(card, i);
1764
1765 /* remove and free each DAI */
1766 soc_remove_dai_links(card);
1767
1768 soc_cleanup_card_debugfs(card);
1769
1770 /* remove the card */
1771 if (card->remove)
1772 card->remove(card);
1773
1774 snd_soc_dapm_free(&card->dapm);
1775
1776 snd_card_free(card->snd_card);
1777 return 0;
1778
1779 }
1780
1781 /* removes a socdev */
1782 static int soc_remove(struct platform_device *pdev)
1783 {
1784 struct snd_soc_card *card = platform_get_drvdata(pdev);
1785
1786 snd_soc_unregister_card(card);
1787 return 0;
1788 }
1789
1790 int snd_soc_poweroff(struct device *dev)
1791 {
1792 struct snd_soc_card *card = dev_get_drvdata(dev);
1793 int i;
1794
1795 if (!card->instantiated)
1796 return 0;
1797
1798 /* Flush out pmdown_time work - we actually do want to run it
1799 * now, we're shutting down so no imminent restart. */
1800 for (i = 0; i < card->num_rtd; i++) {
1801 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1802 flush_delayed_work(&rtd->delayed_work);
1803 }
1804
1805 snd_soc_dapm_shutdown(card);
1806
1807 /* deactivate pins to sleep state */
1808 for (i = 0; i < card->num_rtd; i++) {
1809 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1810 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1811 int j;
1812
1813 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1814 for (j = 0; j < rtd->num_codecs; j++) {
1815 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1816 pinctrl_pm_select_sleep_state(codec_dai->dev);
1817 }
1818 }
1819
1820 return 0;
1821 }
1822 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1823
1824 const struct dev_pm_ops snd_soc_pm_ops = {
1825 .suspend = snd_soc_suspend,
1826 .resume = snd_soc_resume,
1827 .freeze = snd_soc_suspend,
1828 .thaw = snd_soc_resume,
1829 .poweroff = snd_soc_poweroff,
1830 .restore = snd_soc_resume,
1831 };
1832 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1833
1834 /* ASoC platform driver */
1835 static struct platform_driver soc_driver = {
1836 .driver = {
1837 .name = "soc-audio",
1838 .pm = &snd_soc_pm_ops,
1839 },
1840 .probe = soc_probe,
1841 .remove = soc_remove,
1842 };
1843
1844 /**
1845 * snd_soc_cnew - create new control
1846 * @_template: control template
1847 * @data: control private data
1848 * @long_name: control long name
1849 * @prefix: control name prefix
1850 *
1851 * Create a new mixer control from a template control.
1852 *
1853 * Returns 0 for success, else error.
1854 */
1855 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1856 void *data, const char *long_name,
1857 const char *prefix)
1858 {
1859 struct snd_kcontrol_new template;
1860 struct snd_kcontrol *kcontrol;
1861 char *name = NULL;
1862
1863 memcpy(&template, _template, sizeof(template));
1864 template.index = 0;
1865
1866 if (!long_name)
1867 long_name = template.name;
1868
1869 if (prefix) {
1870 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1871 if (!name)
1872 return NULL;
1873
1874 template.name = name;
1875 } else {
1876 template.name = long_name;
1877 }
1878
1879 kcontrol = snd_ctl_new1(&template, data);
1880
1881 kfree(name);
1882
1883 return kcontrol;
1884 }
1885 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1886
1887 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1888 const struct snd_kcontrol_new *controls, int num_controls,
1889 const char *prefix, void *data)
1890 {
1891 int err, i;
1892
1893 for (i = 0; i < num_controls; i++) {
1894 const struct snd_kcontrol_new *control = &controls[i];
1895 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1896 control->name, prefix));
1897 if (err < 0) {
1898 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1899 control->name, err);
1900 return err;
1901 }
1902 }
1903
1904 return 0;
1905 }
1906
1907 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1908 const char *name)
1909 {
1910 struct snd_card *card = soc_card->snd_card;
1911 struct snd_kcontrol *kctl;
1912
1913 if (unlikely(!name))
1914 return NULL;
1915
1916 list_for_each_entry(kctl, &card->controls, list)
1917 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1918 return kctl;
1919 return NULL;
1920 }
1921 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1922
1923 /**
1924 * snd_soc_add_component_controls - Add an array of controls to a component.
1925 *
1926 * @component: Component to add controls to
1927 * @controls: Array of controls to add
1928 * @num_controls: Number of elements in the array
1929 *
1930 * Return: 0 for success, else error.
1931 */
1932 int snd_soc_add_component_controls(struct snd_soc_component *component,
1933 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1934 {
1935 struct snd_card *card = component->card->snd_card;
1936
1937 return snd_soc_add_controls(card, component->dev, controls,
1938 num_controls, component->name_prefix, component);
1939 }
1940 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1941
1942 /**
1943 * snd_soc_add_codec_controls - add an array of controls to a codec.
1944 * Convenience function to add a list of controls. Many codecs were
1945 * duplicating this code.
1946 *
1947 * @codec: codec to add controls to
1948 * @controls: array of controls to add
1949 * @num_controls: number of elements in the array
1950 *
1951 * Return 0 for success, else error.
1952 */
1953 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1954 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1955 {
1956 return snd_soc_add_component_controls(&codec->component, controls,
1957 num_controls);
1958 }
1959 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1960
1961 /**
1962 * snd_soc_add_platform_controls - add an array of controls to a platform.
1963 * Convenience function to add a list of controls.
1964 *
1965 * @platform: platform to add controls to
1966 * @controls: array of controls to add
1967 * @num_controls: number of elements in the array
1968 *
1969 * Return 0 for success, else error.
1970 */
1971 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1972 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1973 {
1974 return snd_soc_add_component_controls(&platform->component, controls,
1975 num_controls);
1976 }
1977 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1978
1979 /**
1980 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1981 * Convenience function to add a list of controls.
1982 *
1983 * @soc_card: SoC card to add controls to
1984 * @controls: array of controls to add
1985 * @num_controls: number of elements in the array
1986 *
1987 * Return 0 for success, else error.
1988 */
1989 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1990 const struct snd_kcontrol_new *controls, int num_controls)
1991 {
1992 struct snd_card *card = soc_card->snd_card;
1993
1994 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1995 NULL, soc_card);
1996 }
1997 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1998
1999 /**
2000 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2001 * Convienience function to add a list of controls.
2002 *
2003 * @dai: DAI to add controls to
2004 * @controls: array of controls to add
2005 * @num_controls: number of elements in the array
2006 *
2007 * Return 0 for success, else error.
2008 */
2009 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2010 const struct snd_kcontrol_new *controls, int num_controls)
2011 {
2012 struct snd_card *card = dai->component->card->snd_card;
2013
2014 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2015 NULL, dai);
2016 }
2017 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2018
2019 /**
2020 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2021 * @dai: DAI
2022 * @clk_id: DAI specific clock ID
2023 * @freq: new clock frequency in Hz
2024 * @dir: new clock direction - input/output.
2025 *
2026 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2027 */
2028 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2029 unsigned int freq, int dir)
2030 {
2031 if (dai->driver && dai->driver->ops->set_sysclk)
2032 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2033 else if (dai->codec && dai->codec->driver->set_sysclk)
2034 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2035 freq, dir);
2036 else
2037 return -ENOTSUPP;
2038 }
2039 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2040
2041 /**
2042 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2043 * @codec: CODEC
2044 * @clk_id: DAI specific clock ID
2045 * @source: Source for the clock
2046 * @freq: new clock frequency in Hz
2047 * @dir: new clock direction - input/output.
2048 *
2049 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2050 */
2051 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2052 int source, unsigned int freq, int dir)
2053 {
2054 if (codec->driver->set_sysclk)
2055 return codec->driver->set_sysclk(codec, clk_id, source,
2056 freq, dir);
2057 else
2058 return -ENOTSUPP;
2059 }
2060 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2061
2062 /**
2063 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2064 * @dai: DAI
2065 * @div_id: DAI specific clock divider ID
2066 * @div: new clock divisor.
2067 *
2068 * Configures the clock dividers. This is used to derive the best DAI bit and
2069 * frame clocks from the system or master clock. It's best to set the DAI bit
2070 * and frame clocks as low as possible to save system power.
2071 */
2072 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2073 int div_id, int div)
2074 {
2075 if (dai->driver && dai->driver->ops->set_clkdiv)
2076 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2077 else
2078 return -EINVAL;
2079 }
2080 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2081
2082 /**
2083 * snd_soc_dai_set_pll - configure DAI PLL.
2084 * @dai: DAI
2085 * @pll_id: DAI specific PLL ID
2086 * @source: DAI specific source for the PLL
2087 * @freq_in: PLL input clock frequency in Hz
2088 * @freq_out: requested PLL output clock frequency in Hz
2089 *
2090 * Configures and enables PLL to generate output clock based on input clock.
2091 */
2092 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2093 unsigned int freq_in, unsigned int freq_out)
2094 {
2095 if (dai->driver && dai->driver->ops->set_pll)
2096 return dai->driver->ops->set_pll(dai, pll_id, source,
2097 freq_in, freq_out);
2098 else if (dai->codec && dai->codec->driver->set_pll)
2099 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2100 freq_in, freq_out);
2101 else
2102 return -EINVAL;
2103 }
2104 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2105
2106 /*
2107 * snd_soc_codec_set_pll - configure codec PLL.
2108 * @codec: CODEC
2109 * @pll_id: DAI specific PLL ID
2110 * @source: DAI specific source for the PLL
2111 * @freq_in: PLL input clock frequency in Hz
2112 * @freq_out: requested PLL output clock frequency in Hz
2113 *
2114 * Configures and enables PLL to generate output clock based on input clock.
2115 */
2116 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2117 unsigned int freq_in, unsigned int freq_out)
2118 {
2119 if (codec->driver->set_pll)
2120 return codec->driver->set_pll(codec, pll_id, source,
2121 freq_in, freq_out);
2122 else
2123 return -EINVAL;
2124 }
2125 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2126
2127 /**
2128 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2129 * @dai: DAI
2130 * @ratio Ratio of BCLK to Sample rate.
2131 *
2132 * Configures the DAI for a preset BCLK to sample rate ratio.
2133 */
2134 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2135 {
2136 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2137 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2138 else
2139 return -EINVAL;
2140 }
2141 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2142
2143 /**
2144 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2145 * @dai: DAI
2146 * @fmt: SND_SOC_DAIFMT_ format value.
2147 *
2148 * Configures the DAI hardware format and clocking.
2149 */
2150 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2151 {
2152 if (dai->driver == NULL)
2153 return -EINVAL;
2154 if (dai->driver->ops->set_fmt == NULL)
2155 return -ENOTSUPP;
2156 return dai->driver->ops->set_fmt(dai, fmt);
2157 }
2158 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2159
2160 /**
2161 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2162 * @slots: Number of slots in use.
2163 * @tx_mask: bitmask representing active TX slots.
2164 * @rx_mask: bitmask representing active RX slots.
2165 *
2166 * Generates the TDM tx and rx slot default masks for DAI.
2167 */
2168 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2169 unsigned int *tx_mask,
2170 unsigned int *rx_mask)
2171 {
2172 if (*tx_mask || *rx_mask)
2173 return 0;
2174
2175 if (!slots)
2176 return -EINVAL;
2177
2178 *tx_mask = (1 << slots) - 1;
2179 *rx_mask = (1 << slots) - 1;
2180
2181 return 0;
2182 }
2183
2184 /**
2185 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2186 * @dai: The DAI to configure
2187 * @tx_mask: bitmask representing active TX slots.
2188 * @rx_mask: bitmask representing active RX slots.
2189 * @slots: Number of slots in use.
2190 * @slot_width: Width in bits for each slot.
2191 *
2192 * This function configures the specified DAI for TDM operation. @slot contains
2193 * the total number of slots of the TDM stream and @slot_with the width of each
2194 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2195 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2196 * DAI should write to or read from. If a bit is set the corresponding slot is
2197 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2198 * the first slot, bit 1 to the second slot and so on. The first active slot
2199 * maps to the first channel of the DAI, the second active slot to the second
2200 * channel and so on.
2201 *
2202 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2203 * @rx_mask and @slot_width will be ignored.
2204 *
2205 * Returns 0 on success, a negative error code otherwise.
2206 */
2207 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2208 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2209 {
2210 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2211 dai->driver->ops->xlate_tdm_slot_mask(slots,
2212 &tx_mask, &rx_mask);
2213 else
2214 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2215
2216 dai->tx_mask = tx_mask;
2217 dai->rx_mask = rx_mask;
2218
2219 if (dai->driver && dai->driver->ops->set_tdm_slot)
2220 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2221 slots, slot_width);
2222 else
2223 return -ENOTSUPP;
2224 }
2225 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2226
2227 /**
2228 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2229 * @dai: DAI
2230 * @tx_num: how many TX channels
2231 * @tx_slot: pointer to an array which imply the TX slot number channel
2232 * 0~num-1 uses
2233 * @rx_num: how many RX channels
2234 * @rx_slot: pointer to an array which imply the RX slot number channel
2235 * 0~num-1 uses
2236 *
2237 * configure the relationship between channel number and TDM slot number.
2238 */
2239 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2240 unsigned int tx_num, unsigned int *tx_slot,
2241 unsigned int rx_num, unsigned int *rx_slot)
2242 {
2243 if (dai->driver && dai->driver->ops->set_channel_map)
2244 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2245 rx_num, rx_slot);
2246 else
2247 return -EINVAL;
2248 }
2249 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2250
2251 /**
2252 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2253 * @dai: DAI
2254 * @tristate: tristate enable
2255 *
2256 * Tristates the DAI so that others can use it.
2257 */
2258 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2259 {
2260 if (dai->driver && dai->driver->ops->set_tristate)
2261 return dai->driver->ops->set_tristate(dai, tristate);
2262 else
2263 return -EINVAL;
2264 }
2265 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2266
2267 /**
2268 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2269 * @dai: DAI
2270 * @mute: mute enable
2271 * @direction: stream to mute
2272 *
2273 * Mutes the DAI DAC.
2274 */
2275 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2276 int direction)
2277 {
2278 if (!dai->driver)
2279 return -ENOTSUPP;
2280
2281 if (dai->driver->ops->mute_stream)
2282 return dai->driver->ops->mute_stream(dai, mute, direction);
2283 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2284 dai->driver->ops->digital_mute)
2285 return dai->driver->ops->digital_mute(dai, mute);
2286 else
2287 return -ENOTSUPP;
2288 }
2289 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2290
2291 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2292 struct snd_soc_dai_link *dai_link)
2293 {
2294 /* Legacy codec/codec_dai link is a single entry in multicodec */
2295 if (dai_link->codec_name || dai_link->codec_of_node ||
2296 dai_link->codec_dai_name) {
2297 dai_link->num_codecs = 1;
2298
2299 dai_link->codecs = devm_kzalloc(card->dev,
2300 sizeof(struct snd_soc_dai_link_component),
2301 GFP_KERNEL);
2302 if (!dai_link->codecs)
2303 return -ENOMEM;
2304
2305 dai_link->codecs[0].name = dai_link->codec_name;
2306 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2307 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2308 }
2309
2310 if (!dai_link->codecs) {
2311 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2312 return -EINVAL;
2313 }
2314
2315 return 0;
2316 }
2317
2318 /**
2319 * snd_soc_register_card - Register a card with the ASoC core
2320 *
2321 * @card: Card to register
2322 *
2323 */
2324 int snd_soc_register_card(struct snd_soc_card *card)
2325 {
2326 int i, j, ret;
2327
2328 if (!card->name || !card->dev)
2329 return -EINVAL;
2330
2331 for (i = 0; i < card->num_links; i++) {
2332 struct snd_soc_dai_link *link = &card->dai_link[i];
2333
2334 ret = snd_soc_init_multicodec(card, link);
2335 if (ret) {
2336 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2337 return ret;
2338 }
2339
2340 for (j = 0; j < link->num_codecs; j++) {
2341 /*
2342 * Codec must be specified by 1 of name or OF node,
2343 * not both or neither.
2344 */
2345 if (!!link->codecs[j].name ==
2346 !!link->codecs[j].of_node) {
2347 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2348 link->name);
2349 return -EINVAL;
2350 }
2351 /* Codec DAI name must be specified */
2352 if (!link->codecs[j].dai_name) {
2353 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2354 link->name);
2355 return -EINVAL;
2356 }
2357 }
2358
2359 /*
2360 * Platform may be specified by either name or OF node, but
2361 * can be left unspecified, and a dummy platform will be used.
2362 */
2363 if (link->platform_name && link->platform_of_node) {
2364 dev_err(card->dev,
2365 "ASoC: Both platform name/of_node are set for %s\n",
2366 link->name);
2367 return -EINVAL;
2368 }
2369
2370 /*
2371 * CPU device may be specified by either name or OF node, but
2372 * can be left unspecified, and will be matched based on DAI
2373 * name alone..
2374 */
2375 if (link->cpu_name && link->cpu_of_node) {
2376 dev_err(card->dev,
2377 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2378 link->name);
2379 return -EINVAL;
2380 }
2381 /*
2382 * At least one of CPU DAI name or CPU device name/node must be
2383 * specified
2384 */
2385 if (!link->cpu_dai_name &&
2386 !(link->cpu_name || link->cpu_of_node)) {
2387 dev_err(card->dev,
2388 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2389 link->name);
2390 return -EINVAL;
2391 }
2392 }
2393
2394 dev_set_drvdata(card->dev, card);
2395
2396 snd_soc_initialize_card_lists(card);
2397
2398 card->rtd = devm_kzalloc(card->dev,
2399 sizeof(struct snd_soc_pcm_runtime) *
2400 (card->num_links + card->num_aux_devs),
2401 GFP_KERNEL);
2402 if (card->rtd == NULL)
2403 return -ENOMEM;
2404 card->num_rtd = 0;
2405 card->rtd_aux = &card->rtd[card->num_links];
2406
2407 for (i = 0; i < card->num_links; i++) {
2408 card->rtd[i].card = card;
2409 card->rtd[i].dai_link = &card->dai_link[i];
2410 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2411 sizeof(struct snd_soc_dai *) *
2412 (card->rtd[i].dai_link->num_codecs),
2413 GFP_KERNEL);
2414 if (card->rtd[i].codec_dais == NULL)
2415 return -ENOMEM;
2416 }
2417
2418 for (i = 0; i < card->num_aux_devs; i++)
2419 card->rtd_aux[i].card = card;
2420
2421 INIT_LIST_HEAD(&card->dapm_dirty);
2422 INIT_LIST_HEAD(&card->dobj_list);
2423 card->instantiated = 0;
2424 mutex_init(&card->mutex);
2425 mutex_init(&card->dapm_mutex);
2426
2427 ret = snd_soc_instantiate_card(card);
2428 if (ret != 0)
2429 return ret;
2430
2431 /* deactivate pins to sleep state */
2432 for (i = 0; i < card->num_rtd; i++) {
2433 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2434 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2435 int j;
2436
2437 for (j = 0; j < rtd->num_codecs; j++) {
2438 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2439 if (!codec_dai->active)
2440 pinctrl_pm_select_sleep_state(codec_dai->dev);
2441 }
2442
2443 if (!cpu_dai->active)
2444 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2445 }
2446
2447 return ret;
2448 }
2449 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2450
2451 /**
2452 * snd_soc_unregister_card - Unregister a card with the ASoC core
2453 *
2454 * @card: Card to unregister
2455 *
2456 */
2457 int snd_soc_unregister_card(struct snd_soc_card *card)
2458 {
2459 if (card->instantiated) {
2460 card->instantiated = false;
2461 snd_soc_dapm_shutdown(card);
2462 soc_cleanup_card_resources(card);
2463 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2464 }
2465
2466 return 0;
2467 }
2468 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2469
2470 /*
2471 * Simplify DAI link configuration by removing ".-1" from device names
2472 * and sanitizing names.
2473 */
2474 static char *fmt_single_name(struct device *dev, int *id)
2475 {
2476 char *found, name[NAME_SIZE];
2477 int id1, id2;
2478
2479 if (dev_name(dev) == NULL)
2480 return NULL;
2481
2482 strlcpy(name, dev_name(dev), NAME_SIZE);
2483
2484 /* are we a "%s.%d" name (platform and SPI components) */
2485 found = strstr(name, dev->driver->name);
2486 if (found) {
2487 /* get ID */
2488 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2489
2490 /* discard ID from name if ID == -1 */
2491 if (*id == -1)
2492 found[strlen(dev->driver->name)] = '\0';
2493 }
2494
2495 } else {
2496 /* I2C component devices are named "bus-addr" */
2497 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2498 char tmp[NAME_SIZE];
2499
2500 /* create unique ID number from I2C addr and bus */
2501 *id = ((id1 & 0xffff) << 16) + id2;
2502
2503 /* sanitize component name for DAI link creation */
2504 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2505 strlcpy(name, tmp, NAME_SIZE);
2506 } else
2507 *id = 0;
2508 }
2509
2510 return kstrdup(name, GFP_KERNEL);
2511 }
2512
2513 /*
2514 * Simplify DAI link naming for single devices with multiple DAIs by removing
2515 * any ".-1" and using the DAI name (instead of device name).
2516 */
2517 static inline char *fmt_multiple_name(struct device *dev,
2518 struct snd_soc_dai_driver *dai_drv)
2519 {
2520 if (dai_drv->name == NULL) {
2521 dev_err(dev,
2522 "ASoC: error - multiple DAI %s registered with no name\n",
2523 dev_name(dev));
2524 return NULL;
2525 }
2526
2527 return kstrdup(dai_drv->name, GFP_KERNEL);
2528 }
2529
2530 /**
2531 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2532 *
2533 * @component: The component for which the DAIs should be unregistered
2534 */
2535 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2536 {
2537 struct snd_soc_dai *dai, *_dai;
2538
2539 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2540 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2541 dai->name);
2542 list_del(&dai->list);
2543 kfree(dai->name);
2544 kfree(dai);
2545 }
2546 }
2547
2548 /**
2549 * snd_soc_register_dais - Register a DAI with the ASoC core
2550 *
2551 * @component: The component the DAIs are registered for
2552 * @dai_drv: DAI driver to use for the DAIs
2553 * @count: Number of DAIs
2554 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2555 * parent's name.
2556 */
2557 static int snd_soc_register_dais(struct snd_soc_component *component,
2558 struct snd_soc_dai_driver *dai_drv, size_t count,
2559 bool legacy_dai_naming)
2560 {
2561 struct device *dev = component->dev;
2562 struct snd_soc_dai *dai;
2563 unsigned int i;
2564 int ret;
2565
2566 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2567
2568 component->dai_drv = dai_drv;
2569 component->num_dai = count;
2570
2571 for (i = 0; i < count; i++) {
2572
2573 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2574 if (dai == NULL) {
2575 ret = -ENOMEM;
2576 goto err;
2577 }
2578
2579 /*
2580 * Back in the old days when we still had component-less DAIs,
2581 * instead of having a static name, component-less DAIs would
2582 * inherit the name of the parent device so it is possible to
2583 * register multiple instances of the DAI. We still need to keep
2584 * the same naming style even though those DAIs are not
2585 * component-less anymore.
2586 */
2587 if (count == 1 && legacy_dai_naming &&
2588 (dai_drv[i].id == 0 || dai_drv[i].name == NULL)) {
2589 dai->name = fmt_single_name(dev, &dai->id);
2590 } else {
2591 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2592 if (dai_drv[i].id)
2593 dai->id = dai_drv[i].id;
2594 else
2595 dai->id = i;
2596 }
2597 if (dai->name == NULL) {
2598 kfree(dai);
2599 ret = -ENOMEM;
2600 goto err;
2601 }
2602
2603 dai->component = component;
2604 dai->dev = dev;
2605 dai->driver = &dai_drv[i];
2606 if (!dai->driver->ops)
2607 dai->driver->ops = &null_dai_ops;
2608
2609 list_add(&dai->list, &component->dai_list);
2610
2611 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2612 }
2613
2614 return 0;
2615
2616 err:
2617 snd_soc_unregister_dais(component);
2618
2619 return ret;
2620 }
2621
2622 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2623 enum snd_soc_dapm_type type, int subseq)
2624 {
2625 struct snd_soc_component *component = dapm->component;
2626
2627 component->driver->seq_notifier(component, type, subseq);
2628 }
2629
2630 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2631 int event)
2632 {
2633 struct snd_soc_component *component = dapm->component;
2634
2635 return component->driver->stream_event(component, event);
2636 }
2637
2638 static int snd_soc_component_initialize(struct snd_soc_component *component,
2639 const struct snd_soc_component_driver *driver, struct device *dev)
2640 {
2641 struct snd_soc_dapm_context *dapm;
2642
2643 component->name = fmt_single_name(dev, &component->id);
2644 if (!component->name) {
2645 dev_err(dev, "ASoC: Failed to allocate name\n");
2646 return -ENOMEM;
2647 }
2648
2649 component->dev = dev;
2650 component->driver = driver;
2651 component->probe = component->driver->probe;
2652 component->remove = component->driver->remove;
2653
2654 if (!component->dapm_ptr)
2655 component->dapm_ptr = &component->dapm;
2656
2657 dapm = component->dapm_ptr;
2658 dapm->dev = dev;
2659 dapm->component = component;
2660 dapm->bias_level = SND_SOC_BIAS_OFF;
2661 dapm->idle_bias_off = true;
2662 if (driver->seq_notifier)
2663 dapm->seq_notifier = snd_soc_component_seq_notifier;
2664 if (driver->stream_event)
2665 dapm->stream_event = snd_soc_component_stream_event;
2666
2667 component->controls = driver->controls;
2668 component->num_controls = driver->num_controls;
2669 component->dapm_widgets = driver->dapm_widgets;
2670 component->num_dapm_widgets = driver->num_dapm_widgets;
2671 component->dapm_routes = driver->dapm_routes;
2672 component->num_dapm_routes = driver->num_dapm_routes;
2673
2674 INIT_LIST_HEAD(&component->dai_list);
2675 mutex_init(&component->io_mutex);
2676
2677 return 0;
2678 }
2679
2680 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2681 {
2682 int val_bytes = regmap_get_val_bytes(component->regmap);
2683
2684 /* Errors are legitimate for non-integer byte multiples */
2685 if (val_bytes > 0)
2686 component->val_bytes = val_bytes;
2687 }
2688
2689 #ifdef CONFIG_REGMAP
2690
2691 /**
2692 * snd_soc_component_init_regmap() - Initialize regmap instance for the 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 */
2701 void 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 }
2707 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2708
2709 /**
2710 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2711 * @component: The component for which to de-initialize the regmap instance
2712 *
2713 * Calls regmap_exit() on the regmap instance associated to the component and
2714 * removes the regmap instance from the component.
2715 *
2716 * This function should only be used if snd_soc_component_init_regmap() was used
2717 * to initialize the regmap instance.
2718 */
2719 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2720 {
2721 regmap_exit(component->regmap);
2722 component->regmap = NULL;
2723 }
2724 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2725
2726 #endif
2727
2728 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2729 {
2730 if (!component->write && !component->read) {
2731 if (!component->regmap)
2732 component->regmap = dev_get_regmap(component->dev, NULL);
2733 if (component->regmap)
2734 snd_soc_component_setup_regmap(component);
2735 }
2736
2737 list_add(&component->list, &component_list);
2738 INIT_LIST_HEAD(&component->dobj_list);
2739 }
2740
2741 static void snd_soc_component_add(struct snd_soc_component *component)
2742 {
2743 mutex_lock(&client_mutex);
2744 snd_soc_component_add_unlocked(component);
2745 mutex_unlock(&client_mutex);
2746 }
2747
2748 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2749 {
2750 snd_soc_unregister_dais(component);
2751 kfree(component->name);
2752 }
2753
2754 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2755 {
2756 list_del(&component->list);
2757 }
2758
2759 int snd_soc_register_component(struct device *dev,
2760 const struct snd_soc_component_driver *cmpnt_drv,
2761 struct snd_soc_dai_driver *dai_drv,
2762 int num_dai)
2763 {
2764 struct snd_soc_component *cmpnt;
2765 int ret;
2766
2767 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2768 if (!cmpnt) {
2769 dev_err(dev, "ASoC: Failed to allocate memory\n");
2770 return -ENOMEM;
2771 }
2772
2773 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2774 if (ret)
2775 goto err_free;
2776
2777 cmpnt->ignore_pmdown_time = true;
2778 cmpnt->registered_as_component = true;
2779
2780 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2781 if (ret < 0) {
2782 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2783 goto err_cleanup;
2784 }
2785
2786 snd_soc_component_add(cmpnt);
2787
2788 return 0;
2789
2790 err_cleanup:
2791 snd_soc_component_cleanup(cmpnt);
2792 err_free:
2793 kfree(cmpnt);
2794 return ret;
2795 }
2796 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2797
2798 /**
2799 * snd_soc_unregister_component - Unregister a component from the ASoC core
2800 *
2801 */
2802 void snd_soc_unregister_component(struct device *dev)
2803 {
2804 struct snd_soc_component *cmpnt;
2805
2806 mutex_lock(&client_mutex);
2807 list_for_each_entry(cmpnt, &component_list, list) {
2808 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2809 goto found;
2810 }
2811 mutex_unlock(&client_mutex);
2812 return;
2813
2814 found:
2815 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
2816 snd_soc_component_del_unlocked(cmpnt);
2817 mutex_unlock(&client_mutex);
2818 snd_soc_component_cleanup(cmpnt);
2819 kfree(cmpnt);
2820 }
2821 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2822
2823 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2824 {
2825 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2826
2827 return platform->driver->probe(platform);
2828 }
2829
2830 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2831 {
2832 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2833
2834 platform->driver->remove(platform);
2835 }
2836
2837 /**
2838 * snd_soc_add_platform - Add a platform to the ASoC core
2839 * @dev: The parent device for the platform
2840 * @platform: The platform to add
2841 * @platform_driver: The driver for the platform
2842 */
2843 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2844 const struct snd_soc_platform_driver *platform_drv)
2845 {
2846 int ret;
2847
2848 ret = snd_soc_component_initialize(&platform->component,
2849 &platform_drv->component_driver, dev);
2850 if (ret)
2851 return ret;
2852
2853 platform->dev = dev;
2854 platform->driver = platform_drv;
2855
2856 if (platform_drv->probe)
2857 platform->component.probe = snd_soc_platform_drv_probe;
2858 if (platform_drv->remove)
2859 platform->component.remove = snd_soc_platform_drv_remove;
2860
2861 #ifdef CONFIG_DEBUG_FS
2862 platform->component.debugfs_prefix = "platform";
2863 #endif
2864
2865 mutex_lock(&client_mutex);
2866 snd_soc_component_add_unlocked(&platform->component);
2867 list_add(&platform->list, &platform_list);
2868 mutex_unlock(&client_mutex);
2869
2870 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2871 platform->component.name);
2872
2873 return 0;
2874 }
2875 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2876
2877 /**
2878 * snd_soc_register_platform - Register a platform with the ASoC core
2879 *
2880 * @platform: platform to register
2881 */
2882 int snd_soc_register_platform(struct device *dev,
2883 const struct snd_soc_platform_driver *platform_drv)
2884 {
2885 struct snd_soc_platform *platform;
2886 int ret;
2887
2888 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2889
2890 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2891 if (platform == NULL)
2892 return -ENOMEM;
2893
2894 ret = snd_soc_add_platform(dev, platform, platform_drv);
2895 if (ret)
2896 kfree(platform);
2897
2898 return ret;
2899 }
2900 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2901
2902 /**
2903 * snd_soc_remove_platform - Remove a platform from the ASoC core
2904 * @platform: the platform to remove
2905 */
2906 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2907 {
2908
2909 mutex_lock(&client_mutex);
2910 list_del(&platform->list);
2911 snd_soc_component_del_unlocked(&platform->component);
2912 mutex_unlock(&client_mutex);
2913
2914 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2915 platform->component.name);
2916
2917 snd_soc_component_cleanup(&platform->component);
2918 }
2919 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2920
2921 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2922 {
2923 struct snd_soc_platform *platform;
2924
2925 mutex_lock(&client_mutex);
2926 list_for_each_entry(platform, &platform_list, list) {
2927 if (dev == platform->dev) {
2928 mutex_unlock(&client_mutex);
2929 return platform;
2930 }
2931 }
2932 mutex_unlock(&client_mutex);
2933
2934 return NULL;
2935 }
2936 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2937
2938 /**
2939 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2940 *
2941 * @platform: platform to unregister
2942 */
2943 void snd_soc_unregister_platform(struct device *dev)
2944 {
2945 struct snd_soc_platform *platform;
2946
2947 platform = snd_soc_lookup_platform(dev);
2948 if (!platform)
2949 return;
2950
2951 snd_soc_remove_platform(platform);
2952 kfree(platform);
2953 }
2954 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2955
2956 static u64 codec_format_map[] = {
2957 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2958 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2959 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2960 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2961 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2962 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2963 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2964 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2965 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2966 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2967 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2968 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2969 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2970 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2971 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2972 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2973 };
2974
2975 /* Fix up the DAI formats for endianness: codecs don't actually see
2976 * the endianness of the data but we're using the CPU format
2977 * definitions which do need to include endianness so we ensure that
2978 * codec DAIs always have both big and little endian variants set.
2979 */
2980 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2981 {
2982 int i;
2983
2984 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2985 if (stream->formats & codec_format_map[i])
2986 stream->formats |= codec_format_map[i];
2987 }
2988
2989 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2990 {
2991 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2992
2993 return codec->driver->probe(codec);
2994 }
2995
2996 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2997 {
2998 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2999
3000 codec->driver->remove(codec);
3001 }
3002
3003 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3004 unsigned int reg, unsigned int val)
3005 {
3006 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3007
3008 return codec->driver->write(codec, reg, val);
3009 }
3010
3011 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3012 unsigned int reg, unsigned int *val)
3013 {
3014 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3015
3016 *val = codec->driver->read(codec, reg);
3017
3018 return 0;
3019 }
3020
3021 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3022 enum snd_soc_bias_level level)
3023 {
3024 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3025
3026 return codec->driver->set_bias_level(codec, level);
3027 }
3028
3029 /**
3030 * snd_soc_register_codec - Register a codec with the ASoC core
3031 *
3032 * @codec: codec to register
3033 */
3034 int snd_soc_register_codec(struct device *dev,
3035 const struct snd_soc_codec_driver *codec_drv,
3036 struct snd_soc_dai_driver *dai_drv,
3037 int num_dai)
3038 {
3039 struct snd_soc_codec *codec;
3040 struct snd_soc_dai *dai;
3041 int ret, i;
3042
3043 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3044
3045 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3046 if (codec == NULL)
3047 return -ENOMEM;
3048
3049 codec->component.dapm_ptr = &codec->dapm;
3050 codec->component.codec = codec;
3051
3052 ret = snd_soc_component_initialize(&codec->component,
3053 &codec_drv->component_driver, dev);
3054 if (ret)
3055 goto err_free;
3056
3057 if (codec_drv->controls) {
3058 codec->component.controls = codec_drv->controls;
3059 codec->component.num_controls = codec_drv->num_controls;
3060 }
3061 if (codec_drv->dapm_widgets) {
3062 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3063 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3064 }
3065 if (codec_drv->dapm_routes) {
3066 codec->component.dapm_routes = codec_drv->dapm_routes;
3067 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3068 }
3069
3070 if (codec_drv->probe)
3071 codec->component.probe = snd_soc_codec_drv_probe;
3072 if (codec_drv->remove)
3073 codec->component.remove = snd_soc_codec_drv_remove;
3074 if (codec_drv->write)
3075 codec->component.write = snd_soc_codec_drv_write;
3076 if (codec_drv->read)
3077 codec->component.read = snd_soc_codec_drv_read;
3078 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3079 codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3080 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3081 if (codec_drv->seq_notifier)
3082 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3083 if (codec_drv->set_bias_level)
3084 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3085 codec->dev = dev;
3086 codec->driver = codec_drv;
3087 codec->component.val_bytes = codec_drv->reg_word_size;
3088
3089 #ifdef CONFIG_DEBUG_FS
3090 codec->component.init_debugfs = soc_init_codec_debugfs;
3091 codec->component.debugfs_prefix = "codec";
3092 #endif
3093
3094 if (codec_drv->get_regmap)
3095 codec->component.regmap = codec_drv->get_regmap(dev);
3096
3097 for (i = 0; i < num_dai; i++) {
3098 fixup_codec_formats(&dai_drv[i].playback);
3099 fixup_codec_formats(&dai_drv[i].capture);
3100 }
3101
3102 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3103 if (ret < 0) {
3104 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3105 goto err_cleanup;
3106 }
3107
3108 list_for_each_entry(dai, &codec->component.dai_list, list)
3109 dai->codec = codec;
3110
3111 mutex_lock(&client_mutex);
3112 snd_soc_component_add_unlocked(&codec->component);
3113 list_add(&codec->list, &codec_list);
3114 mutex_unlock(&client_mutex);
3115
3116 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3117 codec->component.name);
3118 return 0;
3119
3120 err_cleanup:
3121 snd_soc_component_cleanup(&codec->component);
3122 err_free:
3123 kfree(codec);
3124 return ret;
3125 }
3126 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3127
3128 /**
3129 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3130 *
3131 * @codec: codec to unregister
3132 */
3133 void snd_soc_unregister_codec(struct device *dev)
3134 {
3135 struct snd_soc_codec *codec;
3136
3137 mutex_lock(&client_mutex);
3138 list_for_each_entry(codec, &codec_list, list) {
3139 if (dev == codec->dev)
3140 goto found;
3141 }
3142 mutex_unlock(&client_mutex);
3143 return;
3144
3145 found:
3146 list_del(&codec->list);
3147 snd_soc_component_del_unlocked(&codec->component);
3148 mutex_unlock(&client_mutex);
3149
3150 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3151 codec->component.name);
3152
3153 snd_soc_component_cleanup(&codec->component);
3154 snd_soc_cache_exit(codec);
3155 kfree(codec);
3156 }
3157 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3158
3159 /* Retrieve a card's name from device tree */
3160 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3161 const char *propname)
3162 {
3163 struct device_node *np;
3164 int ret;
3165
3166 if (!card->dev) {
3167 pr_err("card->dev is not set before calling %s\n", __func__);
3168 return -EINVAL;
3169 }
3170
3171 np = card->dev->of_node;
3172
3173 ret = of_property_read_string_index(np, propname, 0, &card->name);
3174 /*
3175 * EINVAL means the property does not exist. This is fine providing
3176 * card->name was previously set, which is checked later in
3177 * snd_soc_register_card.
3178 */
3179 if (ret < 0 && ret != -EINVAL) {
3180 dev_err(card->dev,
3181 "ASoC: Property '%s' could not be read: %d\n",
3182 propname, ret);
3183 return ret;
3184 }
3185
3186 return 0;
3187 }
3188 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3189
3190 static const struct snd_soc_dapm_widget simple_widgets[] = {
3191 SND_SOC_DAPM_MIC("Microphone", NULL),
3192 SND_SOC_DAPM_LINE("Line", NULL),
3193 SND_SOC_DAPM_HP("Headphone", NULL),
3194 SND_SOC_DAPM_SPK("Speaker", NULL),
3195 };
3196
3197 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3198 const char *propname)
3199 {
3200 struct device_node *np = card->dev->of_node;
3201 struct snd_soc_dapm_widget *widgets;
3202 const char *template, *wname;
3203 int i, j, num_widgets, ret;
3204
3205 num_widgets = of_property_count_strings(np, propname);
3206 if (num_widgets < 0) {
3207 dev_err(card->dev,
3208 "ASoC: Property '%s' does not exist\n", propname);
3209 return -EINVAL;
3210 }
3211 if (num_widgets & 1) {
3212 dev_err(card->dev,
3213 "ASoC: Property '%s' length is not even\n", propname);
3214 return -EINVAL;
3215 }
3216
3217 num_widgets /= 2;
3218 if (!num_widgets) {
3219 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3220 propname);
3221 return -EINVAL;
3222 }
3223
3224 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3225 GFP_KERNEL);
3226 if (!widgets) {
3227 dev_err(card->dev,
3228 "ASoC: Could not allocate memory for widgets\n");
3229 return -ENOMEM;
3230 }
3231
3232 for (i = 0; i < num_widgets; i++) {
3233 ret = of_property_read_string_index(np, propname,
3234 2 * i, &template);
3235 if (ret) {
3236 dev_err(card->dev,
3237 "ASoC: Property '%s' index %d read error:%d\n",
3238 propname, 2 * i, ret);
3239 return -EINVAL;
3240 }
3241
3242 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3243 if (!strncmp(template, simple_widgets[j].name,
3244 strlen(simple_widgets[j].name))) {
3245 widgets[i] = simple_widgets[j];
3246 break;
3247 }
3248 }
3249
3250 if (j >= ARRAY_SIZE(simple_widgets)) {
3251 dev_err(card->dev,
3252 "ASoC: DAPM widget '%s' is not supported\n",
3253 template);
3254 return -EINVAL;
3255 }
3256
3257 ret = of_property_read_string_index(np, propname,
3258 (2 * i) + 1,
3259 &wname);
3260 if (ret) {
3261 dev_err(card->dev,
3262 "ASoC: Property '%s' index %d read error:%d\n",
3263 propname, (2 * i) + 1, ret);
3264 return -EINVAL;
3265 }
3266
3267 widgets[i].name = wname;
3268 }
3269
3270 card->of_dapm_widgets = widgets;
3271 card->num_of_dapm_widgets = num_widgets;
3272
3273 return 0;
3274 }
3275 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3276
3277 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3278 unsigned int *slots,
3279 unsigned int *slot_width)
3280 {
3281 u32 val;
3282 int ret;
3283
3284 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3285 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3286 if (ret)
3287 return ret;
3288
3289 if (slots)
3290 *slots = val;
3291 }
3292
3293 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3294 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3295 if (ret)
3296 return ret;
3297
3298 if (slot_width)
3299 *slot_width = val;
3300 }
3301
3302 return 0;
3303 }
3304 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3305
3306 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3307 const char *propname)
3308 {
3309 struct device_node *np = card->dev->of_node;
3310 int num_routes;
3311 struct snd_soc_dapm_route *routes;
3312 int i, ret;
3313
3314 num_routes = of_property_count_strings(np, propname);
3315 if (num_routes < 0 || num_routes & 1) {
3316 dev_err(card->dev,
3317 "ASoC: Property '%s' does not exist or its length is not even\n",
3318 propname);
3319 return -EINVAL;
3320 }
3321 num_routes /= 2;
3322 if (!num_routes) {
3323 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3324 propname);
3325 return -EINVAL;
3326 }
3327
3328 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3329 GFP_KERNEL);
3330 if (!routes) {
3331 dev_err(card->dev,
3332 "ASoC: Could not allocate DAPM route table\n");
3333 return -EINVAL;
3334 }
3335
3336 for (i = 0; i < num_routes; i++) {
3337 ret = of_property_read_string_index(np, propname,
3338 2 * i, &routes[i].sink);
3339 if (ret) {
3340 dev_err(card->dev,
3341 "ASoC: Property '%s' index %d could not be read: %d\n",
3342 propname, 2 * i, ret);
3343 return -EINVAL;
3344 }
3345 ret = of_property_read_string_index(np, propname,
3346 (2 * i) + 1, &routes[i].source);
3347 if (ret) {
3348 dev_err(card->dev,
3349 "ASoC: Property '%s' index %d could not be read: %d\n",
3350 propname, (2 * i) + 1, ret);
3351 return -EINVAL;
3352 }
3353 }
3354
3355 card->num_of_dapm_routes = num_routes;
3356 card->of_dapm_routes = routes;
3357
3358 return 0;
3359 }
3360 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3361
3362 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3363 const char *prefix,
3364 struct device_node **bitclkmaster,
3365 struct device_node **framemaster)
3366 {
3367 int ret, i;
3368 char prop[128];
3369 unsigned int format = 0;
3370 int bit, frame;
3371 const char *str;
3372 struct {
3373 char *name;
3374 unsigned int val;
3375 } of_fmt_table[] = {
3376 { "i2s", SND_SOC_DAIFMT_I2S },
3377 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3378 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3379 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3380 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3381 { "ac97", SND_SOC_DAIFMT_AC97 },
3382 { "pdm", SND_SOC_DAIFMT_PDM},
3383 { "msb", SND_SOC_DAIFMT_MSB },
3384 { "lsb", SND_SOC_DAIFMT_LSB },
3385 };
3386
3387 if (!prefix)
3388 prefix = "";
3389
3390 /*
3391 * check "[prefix]format = xxx"
3392 * SND_SOC_DAIFMT_FORMAT_MASK area
3393 */
3394 snprintf(prop, sizeof(prop), "%sformat", prefix);
3395 ret = of_property_read_string(np, prop, &str);
3396 if (ret == 0) {
3397 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3398 if (strcmp(str, of_fmt_table[i].name) == 0) {
3399 format |= of_fmt_table[i].val;
3400 break;
3401 }
3402 }
3403 }
3404
3405 /*
3406 * check "[prefix]continuous-clock"
3407 * SND_SOC_DAIFMT_CLOCK_MASK area
3408 */
3409 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3410 if (of_get_property(np, prop, NULL))
3411 format |= SND_SOC_DAIFMT_CONT;
3412 else
3413 format |= SND_SOC_DAIFMT_GATED;
3414
3415 /*
3416 * check "[prefix]bitclock-inversion"
3417 * check "[prefix]frame-inversion"
3418 * SND_SOC_DAIFMT_INV_MASK area
3419 */
3420 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3421 bit = !!of_get_property(np, prop, NULL);
3422
3423 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3424 frame = !!of_get_property(np, prop, NULL);
3425
3426 switch ((bit << 4) + frame) {
3427 case 0x11:
3428 format |= SND_SOC_DAIFMT_IB_IF;
3429 break;
3430 case 0x10:
3431 format |= SND_SOC_DAIFMT_IB_NF;
3432 break;
3433 case 0x01:
3434 format |= SND_SOC_DAIFMT_NB_IF;
3435 break;
3436 default:
3437 /* SND_SOC_DAIFMT_NB_NF is default */
3438 break;
3439 }
3440
3441 /*
3442 * check "[prefix]bitclock-master"
3443 * check "[prefix]frame-master"
3444 * SND_SOC_DAIFMT_MASTER_MASK area
3445 */
3446 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3447 bit = !!of_get_property(np, prop, NULL);
3448 if (bit && bitclkmaster)
3449 *bitclkmaster = of_parse_phandle(np, prop, 0);
3450
3451 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3452 frame = !!of_get_property(np, prop, NULL);
3453 if (frame && framemaster)
3454 *framemaster = of_parse_phandle(np, prop, 0);
3455
3456 switch ((bit << 4) + frame) {
3457 case 0x11:
3458 format |= SND_SOC_DAIFMT_CBM_CFM;
3459 break;
3460 case 0x10:
3461 format |= SND_SOC_DAIFMT_CBM_CFS;
3462 break;
3463 case 0x01:
3464 format |= SND_SOC_DAIFMT_CBS_CFM;
3465 break;
3466 default:
3467 format |= SND_SOC_DAIFMT_CBS_CFS;
3468 break;
3469 }
3470
3471 return format;
3472 }
3473 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3474
3475 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3476 const char **dai_name)
3477 {
3478 struct snd_soc_component *pos;
3479 struct device_node *component_of_node;
3480 int ret = -EPROBE_DEFER;
3481
3482 mutex_lock(&client_mutex);
3483 list_for_each_entry(pos, &component_list, list) {
3484 component_of_node = pos->dev->of_node;
3485 if (!component_of_node && pos->dev->parent)
3486 component_of_node = pos->dev->parent->of_node;
3487
3488 if (component_of_node != args->np)
3489 continue;
3490
3491 if (pos->driver->of_xlate_dai_name) {
3492 ret = pos->driver->of_xlate_dai_name(pos,
3493 args,
3494 dai_name);
3495 } else {
3496 int id = -1;
3497
3498 switch (args->args_count) {
3499 case 0:
3500 id = 0; /* same as dai_drv[0] */
3501 break;
3502 case 1:
3503 id = args->args[0];
3504 break;
3505 default:
3506 /* not supported */
3507 break;
3508 }
3509
3510 if (id < 0 || id >= pos->num_dai) {
3511 ret = -EINVAL;
3512 continue;
3513 }
3514
3515 ret = 0;
3516
3517 *dai_name = pos->dai_drv[id].name;
3518 if (!*dai_name)
3519 *dai_name = pos->name;
3520 }
3521
3522 break;
3523 }
3524 mutex_unlock(&client_mutex);
3525 return ret;
3526 }
3527
3528 int snd_soc_of_get_dai_name(struct device_node *of_node,
3529 const char **dai_name)
3530 {
3531 struct of_phandle_args args;
3532 int ret;
3533
3534 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3535 "#sound-dai-cells", 0, &args);
3536 if (ret)
3537 return ret;
3538
3539 ret = snd_soc_get_dai_name(&args, dai_name);
3540
3541 of_node_put(args.np);
3542
3543 return ret;
3544 }
3545 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3546
3547 /*
3548 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3549 * @dev: Card device
3550 * @of_node: Device node
3551 * @dai_link: DAI link
3552 *
3553 * Builds an array of CODEC DAI components from the DAI link property
3554 * 'sound-dai'.
3555 * The array is set in the DAI link and the number of DAIs is set accordingly.
3556 * The device nodes in the array (of_node) must be dereferenced by the caller.
3557 *
3558 * Returns 0 for success
3559 */
3560 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3561 struct device_node *of_node,
3562 struct snd_soc_dai_link *dai_link)
3563 {
3564 struct of_phandle_args args;
3565 struct snd_soc_dai_link_component *component;
3566 char *name;
3567 int index, num_codecs, ret;
3568
3569 /* Count the number of CODECs */
3570 name = "sound-dai";
3571 num_codecs = of_count_phandle_with_args(of_node, name,
3572 "#sound-dai-cells");
3573 if (num_codecs <= 0) {
3574 if (num_codecs == -ENOENT)
3575 dev_err(dev, "No 'sound-dai' property\n");
3576 else
3577 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3578 return num_codecs;
3579 }
3580 component = devm_kzalloc(dev,
3581 sizeof *component * num_codecs,
3582 GFP_KERNEL);
3583 if (!component)
3584 return -ENOMEM;
3585 dai_link->codecs = component;
3586 dai_link->num_codecs = num_codecs;
3587
3588 /* Parse the list */
3589 for (index = 0, component = dai_link->codecs;
3590 index < dai_link->num_codecs;
3591 index++, component++) {
3592 ret = of_parse_phandle_with_args(of_node, name,
3593 "#sound-dai-cells",
3594 index, &args);
3595 if (ret)
3596 goto err;
3597 component->of_node = args.np;
3598 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3599 if (ret < 0)
3600 goto err;
3601 }
3602 return 0;
3603 err:
3604 for (index = 0, component = dai_link->codecs;
3605 index < dai_link->num_codecs;
3606 index++, component++) {
3607 if (!component->of_node)
3608 break;
3609 of_node_put(component->of_node);
3610 component->of_node = NULL;
3611 }
3612 dai_link->codecs = NULL;
3613 dai_link->num_codecs = 0;
3614 return ret;
3615 }
3616 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3617
3618 static int __init snd_soc_init(void)
3619 {
3620 snd_soc_debugfs_init();
3621 snd_soc_util_init();
3622
3623 return platform_driver_register(&soc_driver);
3624 }
3625 module_init(snd_soc_init);
3626
3627 static void __exit snd_soc_exit(void)
3628 {
3629 snd_soc_util_exit();
3630 snd_soc_debugfs_exit();
3631
3632 #ifdef CONFIG_DEBUG_FS
3633 #endif
3634 platform_driver_unregister(&soc_driver);
3635 }
3636 module_exit(snd_soc_exit);
3637
3638 /* Module information */
3639 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3640 MODULE_DESCRIPTION("ALSA SoC Core");
3641 MODULE_LICENSE("GPL");
3642 MODULE_ALIAS("platform:soc-audio");
Linux with added FPC-III support