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1/*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/bitops.h>
31#include <linux/debugfs.h>
32#include <linux/platform_device.h>
33#include <linux/ctype.h>
34#include <linux/slab.h>
35#include <linux/of.h>
36#include <sound/ac97_codec.h>
37#include <sound/core.h>
38#include <sound/jack.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include <sound/soc.h>
42#include <sound/soc-dpcm.h>
43#include <sound/initval.h>
44
45#define CREATE_TRACE_POINTS
46#include <trace/events/asoc.h>
47
48#define NAME_SIZE 32
49
50static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
51
52#ifdef CONFIG_DEBUG_FS
53struct dentry *snd_soc_debugfs_root;
54EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55#endif
56
57static DEFINE_MUTEX(client_mutex);
58static LIST_HEAD(dai_list);
59static LIST_HEAD(platform_list);
60static LIST_HEAD(codec_list);
61
62/*
63 * This is a timeout to do a DAPM powerdown after a stream is closed().
64 * It can be used to eliminate pops between different playback streams, e.g.
65 * between two audio tracks.
66 */
67static int pmdown_time = 5000;
68module_param(pmdown_time, int, 0);
69MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
70
71/* returns the minimum number of bytes needed to represent
72 * a particular given value */
73static int min_bytes_needed(unsigned long val)
74{
75 int c = 0;
76 int i;
77
78 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
79 if (val & (1UL << i))
80 break;
81 c = (sizeof val * 8) - c;
82 if (!c || (c % 8))
83 c = (c + 8) / 8;
84 else
85 c /= 8;
86 return c;
87}
88
89/* fill buf which is 'len' bytes with a formatted
90 * string of the form 'reg: value\n' */
91static int format_register_str(struct snd_soc_codec *codec,
92 unsigned int reg, char *buf, size_t len)
93{
94 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
95 int regsize = codec->driver->reg_word_size * 2;
96 int ret;
97 char tmpbuf[len + 1];
98 char regbuf[regsize + 1];
99
100 /* since tmpbuf is allocated on the stack, warn the callers if they
101 * try to abuse this function */
102 WARN_ON(len > 63);
103
104 /* +2 for ': ' and + 1 for '\n' */
105 if (wordsize + regsize + 2 + 1 != len)
106 return -EINVAL;
107
108 ret = snd_soc_read(codec, reg);
109 if (ret < 0) {
110 memset(regbuf, 'X', regsize);
111 regbuf[regsize] = '\0';
112 } else {
113 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
114 }
115
116 /* prepare the buffer */
117 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
118 /* copy it back to the caller without the '\0' */
119 memcpy(buf, tmpbuf, len);
120
121 return 0;
122}
123
124/* codec register dump */
125static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
126 size_t count, loff_t pos)
127{
128 int i, step = 1;
129 int wordsize, regsize;
130 int len;
131 size_t total = 0;
132 loff_t p = 0;
133
134 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
135 regsize = codec->driver->reg_word_size * 2;
136
137 len = wordsize + regsize + 2 + 1;
138
139 if (!codec->driver->reg_cache_size)
140 return 0;
141
142 if (codec->driver->reg_cache_step)
143 step = codec->driver->reg_cache_step;
144
145 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
146 if (!snd_soc_codec_readable_register(codec, i))
147 continue;
148 if (codec->driver->display_register) {
149 count += codec->driver->display_register(codec, buf + count,
150 PAGE_SIZE - count, i);
151 } else {
152 /* only support larger than PAGE_SIZE bytes debugfs
153 * entries for the default case */
154 if (p >= pos) {
155 if (total + len >= count - 1)
156 break;
157 format_register_str(codec, i, buf + total, len);
158 total += len;
159 }
160 p += len;
161 }
162 }
163
164 total = min(total, count - 1);
165
166 return total;
167}
168
169static ssize_t codec_reg_show(struct device *dev,
170 struct device_attribute *attr, char *buf)
171{
172 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
173
174 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
175}
176
177static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
178
179static ssize_t pmdown_time_show(struct device *dev,
180 struct device_attribute *attr, char *buf)
181{
182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
183
184 return sprintf(buf, "%ld\n", rtd->pmdown_time);
185}
186
187static ssize_t pmdown_time_set(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190{
191 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
192 int ret;
193
194 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
195 if (ret)
196 return ret;
197
198 return count;
199}
200
201static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
202
203#ifdef CONFIG_DEBUG_FS
204static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
205 size_t count, loff_t *ppos)
206{
207 ssize_t ret;
208 struct snd_soc_codec *codec = file->private_data;
209 char *buf;
210
211 if (*ppos < 0 || !count)
212 return -EINVAL;
213
214 buf = kmalloc(count, GFP_KERNEL);
215 if (!buf)
216 return -ENOMEM;
217
218 ret = soc_codec_reg_show(codec, buf, count, *ppos);
219 if (ret >= 0) {
220 if (copy_to_user(user_buf, buf, ret)) {
221 kfree(buf);
222 return -EFAULT;
223 }
224 *ppos += ret;
225 }
226
227 kfree(buf);
228 return ret;
229}
230
231static ssize_t codec_reg_write_file(struct file *file,
232 const char __user *user_buf, size_t count, loff_t *ppos)
233{
234 char buf[32];
235 size_t buf_size;
236 char *start = buf;
237 unsigned long reg, value;
238 struct snd_soc_codec *codec = file->private_data;
239
240 buf_size = min(count, (sizeof(buf)-1));
241 if (copy_from_user(buf, user_buf, buf_size))
242 return -EFAULT;
243 buf[buf_size] = 0;
244
245 while (*start == ' ')
246 start++;
247 reg = simple_strtoul(start, &start, 16);
248 while (*start == ' ')
249 start++;
250 if (strict_strtoul(start, 16, &value))
251 return -EINVAL;
252
253 /* Userspace has been fiddling around behind the kernel's back */
254 add_taint(TAINT_USER);
255
256 snd_soc_write(codec, reg, value);
257 return buf_size;
258}
259
260static const struct file_operations codec_reg_fops = {
261 .open = simple_open,
262 .read = codec_reg_read_file,
263 .write = codec_reg_write_file,
264 .llseek = default_llseek,
265};
266
267static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
268{
269 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
270
271 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
272 debugfs_card_root);
273 if (!codec->debugfs_codec_root) {
274 dev_warn(codec->dev, "Failed to create codec debugfs directory\n");
275 return;
276 }
277
278 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
279 &codec->cache_sync);
280 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
281 &codec->cache_only);
282
283 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
284 codec->debugfs_codec_root,
285 codec, &codec_reg_fops);
286 if (!codec->debugfs_reg)
287 dev_warn(codec->dev, "Failed to create codec register debugfs file\n");
288
289 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
290}
291
292static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
293{
294 debugfs_remove_recursive(codec->debugfs_codec_root);
295}
296
297static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
298{
299 struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
300
301 platform->debugfs_platform_root = debugfs_create_dir(platform->name,
302 debugfs_card_root);
303 if (!platform->debugfs_platform_root) {
304 dev_warn(platform->dev,
305 "Failed to create platform debugfs directory\n");
306 return;
307 }
308
309 snd_soc_dapm_debugfs_init(&platform->dapm,
310 platform->debugfs_platform_root);
311}
312
313static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
314{
315 debugfs_remove_recursive(platform->debugfs_platform_root);
316}
317
318static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
319 size_t count, loff_t *ppos)
320{
321 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
322 ssize_t len, ret = 0;
323 struct snd_soc_codec *codec;
324
325 if (!buf)
326 return -ENOMEM;
327
328 list_for_each_entry(codec, &codec_list, list) {
329 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
330 codec->name);
331 if (len >= 0)
332 ret += len;
333 if (ret > PAGE_SIZE) {
334 ret = PAGE_SIZE;
335 break;
336 }
337 }
338
339 if (ret >= 0)
340 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
341
342 kfree(buf);
343
344 return ret;
345}
346
347static const struct file_operations codec_list_fops = {
348 .read = codec_list_read_file,
349 .llseek = default_llseek,/* read accesses f_pos */
350};
351
352static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
353 size_t count, loff_t *ppos)
354{
355 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356 ssize_t len, ret = 0;
357 struct snd_soc_dai *dai;
358
359 if (!buf)
360 return -ENOMEM;
361
362 list_for_each_entry(dai, &dai_list, list) {
363 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
364 if (len >= 0)
365 ret += len;
366 if (ret > PAGE_SIZE) {
367 ret = PAGE_SIZE;
368 break;
369 }
370 }
371
372 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
373
374 kfree(buf);
375
376 return ret;
377}
378
379static const struct file_operations dai_list_fops = {
380 .read = dai_list_read_file,
381 .llseek = default_llseek,/* read accesses f_pos */
382};
383
384static ssize_t platform_list_read_file(struct file *file,
385 char __user *user_buf,
386 size_t count, loff_t *ppos)
387{
388 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
389 ssize_t len, ret = 0;
390 struct snd_soc_platform *platform;
391
392 if (!buf)
393 return -ENOMEM;
394
395 list_for_each_entry(platform, &platform_list, list) {
396 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
397 platform->name);
398 if (len >= 0)
399 ret += len;
400 if (ret > PAGE_SIZE) {
401 ret = PAGE_SIZE;
402 break;
403 }
404 }
405
406 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
407
408 kfree(buf);
409
410 return ret;
411}
412
413static const struct file_operations platform_list_fops = {
414 .read = platform_list_read_file,
415 .llseek = default_llseek,/* read accesses f_pos */
416};
417
418static void soc_init_card_debugfs(struct snd_soc_card *card)
419{
420 card->debugfs_card_root = debugfs_create_dir(card->name,
421 snd_soc_debugfs_root);
422 if (!card->debugfs_card_root) {
423 dev_warn(card->dev,
424 "ASoC: Failed to create card debugfs directory\n");
425 return;
426 }
427
428 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
429 card->debugfs_card_root,
430 &card->pop_time);
431 if (!card->debugfs_pop_time)
432 dev_warn(card->dev,
433 "Failed to create pop time debugfs file\n");
434}
435
436static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
437{
438 debugfs_remove_recursive(card->debugfs_card_root);
439}
440
441#else
442
443static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
444{
445}
446
447static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
448{
449}
450
451static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
452{
453}
454
455static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
456{
457}
458
459static inline void soc_init_card_debugfs(struct snd_soc_card *card)
460{
461}
462
463static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
464{
465}
466#endif
467
468struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
469 const char *dai_link, int stream)
470{
471 int i;
472
473 for (i = 0; i < card->num_links; i++) {
474 if (card->rtd[i].dai_link->no_pcm &&
475 !strcmp(card->rtd[i].dai_link->name, dai_link))
476 return card->rtd[i].pcm->streams[stream].substream;
477 }
478 dev_dbg(card->dev, "failed to find dai link %s\n", dai_link);
479 return NULL;
480}
481EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
482
483struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
484 const char *dai_link)
485{
486 int i;
487
488 for (i = 0; i < card->num_links; i++) {
489 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
490 return &card->rtd[i];
491 }
492 dev_dbg(card->dev, "failed to find rtd %s\n", dai_link);
493 return NULL;
494}
495EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
496
497#ifdef CONFIG_SND_SOC_AC97_BUS
498/* unregister ac97 codec */
499static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
500{
501 if (codec->ac97->dev.bus)
502 device_unregister(&codec->ac97->dev);
503 return 0;
504}
505
506/* stop no dev release warning */
507static void soc_ac97_device_release(struct device *dev){}
508
509/* register ac97 codec to bus */
510static int soc_ac97_dev_register(struct snd_soc_codec *codec)
511{
512 int err;
513
514 codec->ac97->dev.bus = &ac97_bus_type;
515 codec->ac97->dev.parent = codec->card->dev;
516 codec->ac97->dev.release = soc_ac97_device_release;
517
518 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
519 codec->card->snd_card->number, 0, codec->name);
520 err = device_register(&codec->ac97->dev);
521 if (err < 0) {
522 snd_printk(KERN_ERR "Can't register ac97 bus\n");
523 codec->ac97->dev.bus = NULL;
524 return err;
525 }
526 return 0;
527}
528#endif
529
530#ifdef CONFIG_PM_SLEEP
531/* powers down audio subsystem for suspend */
532int snd_soc_suspend(struct device *dev)
533{
534 struct snd_soc_card *card = dev_get_drvdata(dev);
535 struct snd_soc_codec *codec;
536 int i;
537
538 /* If the initialization of this soc device failed, there is no codec
539 * associated with it. Just bail out in this case.
540 */
541 if (list_empty(&card->codec_dev_list))
542 return 0;
543
544 /* Due to the resume being scheduled into a workqueue we could
545 * suspend before that's finished - wait for it to complete.
546 */
547 snd_power_lock(card->snd_card);
548 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
549 snd_power_unlock(card->snd_card);
550
551 /* we're going to block userspace touching us until resume completes */
552 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
553
554 /* mute any active DACs */
555 for (i = 0; i < card->num_rtd; i++) {
556 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
557 struct snd_soc_dai_driver *drv = dai->driver;
558
559 if (card->rtd[i].dai_link->ignore_suspend)
560 continue;
561
562 if (drv->ops->digital_mute && dai->playback_active)
563 drv->ops->digital_mute(dai, 1);
564 }
565
566 /* suspend all pcms */
567 for (i = 0; i < card->num_rtd; i++) {
568 if (card->rtd[i].dai_link->ignore_suspend)
569 continue;
570
571 snd_pcm_suspend_all(card->rtd[i].pcm);
572 }
573
574 if (card->suspend_pre)
575 card->suspend_pre(card);
576
577 for (i = 0; i < card->num_rtd; i++) {
578 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
579 struct snd_soc_platform *platform = card->rtd[i].platform;
580
581 if (card->rtd[i].dai_link->ignore_suspend)
582 continue;
583
584 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
585 cpu_dai->driver->suspend(cpu_dai);
586 if (platform->driver->suspend && !platform->suspended) {
587 platform->driver->suspend(cpu_dai);
588 platform->suspended = 1;
589 }
590 }
591
592 /* close any waiting streams and save state */
593 for (i = 0; i < card->num_rtd; i++) {
594 flush_delayed_work_sync(&card->rtd[i].delayed_work);
595 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
596 }
597
598 for (i = 0; i < card->num_rtd; i++) {
599
600 if (card->rtd[i].dai_link->ignore_suspend)
601 continue;
602
603 snd_soc_dapm_stream_event(&card->rtd[i],
604 SNDRV_PCM_STREAM_PLAYBACK,
605 SND_SOC_DAPM_STREAM_SUSPEND);
606
607 snd_soc_dapm_stream_event(&card->rtd[i],
608 SNDRV_PCM_STREAM_CAPTURE,
609 SND_SOC_DAPM_STREAM_SUSPEND);
610 }
611
612 /* suspend all CODECs */
613 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
614 /* If there are paths active then the CODEC will be held with
615 * bias _ON and should not be suspended. */
616 if (!codec->suspended && codec->driver->suspend) {
617 switch (codec->dapm.bias_level) {
618 case SND_SOC_BIAS_STANDBY:
619 /*
620 * If the CODEC is capable of idle
621 * bias off then being in STANDBY
622 * means it's doing something,
623 * otherwise fall through.
624 */
625 if (codec->dapm.idle_bias_off) {
626 dev_dbg(codec->dev,
627 "idle_bias_off CODEC on over suspend\n");
628 break;
629 }
630 case SND_SOC_BIAS_OFF:
631 codec->driver->suspend(codec);
632 codec->suspended = 1;
633 codec->cache_sync = 1;
634 break;
635 default:
636 dev_dbg(codec->dev, "CODEC is on over suspend\n");
637 break;
638 }
639 }
640 }
641
642 for (i = 0; i < card->num_rtd; i++) {
643 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
644
645 if (card->rtd[i].dai_link->ignore_suspend)
646 continue;
647
648 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
649 cpu_dai->driver->suspend(cpu_dai);
650 }
651
652 if (card->suspend_post)
653 card->suspend_post(card);
654
655 return 0;
656}
657EXPORT_SYMBOL_GPL(snd_soc_suspend);
658
659/* deferred resume work, so resume can complete before we finished
660 * setting our codec back up, which can be very slow on I2C
661 */
662static void soc_resume_deferred(struct work_struct *work)
663{
664 struct snd_soc_card *card =
665 container_of(work, struct snd_soc_card, deferred_resume_work);
666 struct snd_soc_codec *codec;
667 int i;
668
669 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
670 * so userspace apps are blocked from touching us
671 */
672
673 dev_dbg(card->dev, "starting resume work\n");
674
675 /* Bring us up into D2 so that DAPM starts enabling things */
676 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
677
678 if (card->resume_pre)
679 card->resume_pre(card);
680
681 /* resume AC97 DAIs */
682 for (i = 0; i < card->num_rtd; i++) {
683 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
684
685 if (card->rtd[i].dai_link->ignore_suspend)
686 continue;
687
688 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
689 cpu_dai->driver->resume(cpu_dai);
690 }
691
692 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
693 /* If the CODEC was idle over suspend then it will have been
694 * left with bias OFF or STANDBY and suspended so we must now
695 * resume. Otherwise the suspend was suppressed.
696 */
697 if (codec->driver->resume && codec->suspended) {
698 switch (codec->dapm.bias_level) {
699 case SND_SOC_BIAS_STANDBY:
700 case SND_SOC_BIAS_OFF:
701 codec->driver->resume(codec);
702 codec->suspended = 0;
703 break;
704 default:
705 dev_dbg(codec->dev, "CODEC was on over suspend\n");
706 break;
707 }
708 }
709 }
710
711 for (i = 0; i < card->num_rtd; i++) {
712
713 if (card->rtd[i].dai_link->ignore_suspend)
714 continue;
715
716 snd_soc_dapm_stream_event(&card->rtd[i],
717 SNDRV_PCM_STREAM_PLAYBACK,
718 SND_SOC_DAPM_STREAM_RESUME);
719
720 snd_soc_dapm_stream_event(&card->rtd[i],
721 SNDRV_PCM_STREAM_CAPTURE,
722 SND_SOC_DAPM_STREAM_RESUME);
723 }
724
725 /* unmute any active DACs */
726 for (i = 0; i < card->num_rtd; i++) {
727 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
728 struct snd_soc_dai_driver *drv = dai->driver;
729
730 if (card->rtd[i].dai_link->ignore_suspend)
731 continue;
732
733 if (drv->ops->digital_mute && dai->playback_active)
734 drv->ops->digital_mute(dai, 0);
735 }
736
737 for (i = 0; i < card->num_rtd; i++) {
738 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
739 struct snd_soc_platform *platform = card->rtd[i].platform;
740
741 if (card->rtd[i].dai_link->ignore_suspend)
742 continue;
743
744 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
745 cpu_dai->driver->resume(cpu_dai);
746 if (platform->driver->resume && platform->suspended) {
747 platform->driver->resume(cpu_dai);
748 platform->suspended = 0;
749 }
750 }
751
752 if (card->resume_post)
753 card->resume_post(card);
754
755 dev_dbg(card->dev, "resume work completed\n");
756
757 /* userspace can access us now we are back as we were before */
758 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
759}
760
761/* powers up audio subsystem after a suspend */
762int snd_soc_resume(struct device *dev)
763{
764 struct snd_soc_card *card = dev_get_drvdata(dev);
765 int i, ac97_control = 0;
766
767 /* If the initialization of this soc device failed, there is no codec
768 * associated with it. Just bail out in this case.
769 */
770 if (list_empty(&card->codec_dev_list))
771 return 0;
772
773 /* AC97 devices might have other drivers hanging off them so
774 * need to resume immediately. Other drivers don't have that
775 * problem and may take a substantial amount of time to resume
776 * due to I/O costs and anti-pop so handle them out of line.
777 */
778 for (i = 0; i < card->num_rtd; i++) {
779 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
780 ac97_control |= cpu_dai->driver->ac97_control;
781 }
782 if (ac97_control) {
783 dev_dbg(dev, "Resuming AC97 immediately\n");
784 soc_resume_deferred(&card->deferred_resume_work);
785 } else {
786 dev_dbg(dev, "Scheduling resume work\n");
787 if (!schedule_work(&card->deferred_resume_work))
788 dev_err(dev, "resume work item may be lost\n");
789 }
790
791 return 0;
792}
793EXPORT_SYMBOL_GPL(snd_soc_resume);
794#else
795#define snd_soc_suspend NULL
796#define snd_soc_resume NULL
797#endif
798
799static const struct snd_soc_dai_ops null_dai_ops = {
800};
801
802static int soc_bind_dai_link(struct snd_soc_card *card, int num)
803{
804 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
805 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
806 struct snd_soc_codec *codec;
807 struct snd_soc_platform *platform;
808 struct snd_soc_dai *codec_dai, *cpu_dai;
809 const char *platform_name;
810
811 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
812
813 /* Find CPU DAI from registered DAIs*/
814 list_for_each_entry(cpu_dai, &dai_list, list) {
815 if (dai_link->cpu_dai_of_node) {
816 if (cpu_dai->dev->of_node != dai_link->cpu_dai_of_node)
817 continue;
818 } else {
819 if (strcmp(cpu_dai->name, dai_link->cpu_dai_name))
820 continue;
821 }
822
823 rtd->cpu_dai = cpu_dai;
824 }
825
826 if (!rtd->cpu_dai) {
827 dev_dbg(card->dev, "CPU DAI %s not registered\n",
828 dai_link->cpu_dai_name);
829 return -EPROBE_DEFER;
830 }
831
832 /* Find CODEC from registered CODECs */
833 list_for_each_entry(codec, &codec_list, list) {
834 if (dai_link->codec_of_node) {
835 if (codec->dev->of_node != dai_link->codec_of_node)
836 continue;
837 } else {
838 if (strcmp(codec->name, dai_link->codec_name))
839 continue;
840 }
841
842 rtd->codec = codec;
843
844 /*
845 * CODEC found, so find CODEC DAI from registered DAIs from
846 * this CODEC
847 */
848 list_for_each_entry(codec_dai, &dai_list, list) {
849 if (codec->dev == codec_dai->dev &&
850 !strcmp(codec_dai->name,
851 dai_link->codec_dai_name)) {
852
853 rtd->codec_dai = codec_dai;
854 }
855 }
856
857 if (!rtd->codec_dai) {
858 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
859 dai_link->codec_dai_name);
860 return -EPROBE_DEFER;
861 }
862 }
863
864 if (!rtd->codec) {
865 dev_dbg(card->dev, "CODEC %s not registered\n",
866 dai_link->codec_name);
867 return -EPROBE_DEFER;
868 }
869
870 /* if there's no platform we match on the empty platform */
871 platform_name = dai_link->platform_name;
872 if (!platform_name && !dai_link->platform_of_node)
873 platform_name = "snd-soc-dummy";
874
875 /* find one from the set of registered platforms */
876 list_for_each_entry(platform, &platform_list, list) {
877 if (dai_link->platform_of_node) {
878 if (platform->dev->of_node !=
879 dai_link->platform_of_node)
880 continue;
881 } else {
882 if (strcmp(platform->name, platform_name))
883 continue;
884 }
885
886 rtd->platform = platform;
887 }
888 if (!rtd->platform) {
889 dev_dbg(card->dev, "platform %s not registered\n",
890 dai_link->platform_name);
891 return -EPROBE_DEFER;
892 }
893
894 card->num_rtd++;
895
896 return 0;
897}
898
899static void soc_remove_codec(struct snd_soc_codec *codec)
900{
901 int err;
902
903 if (codec->driver->remove) {
904 err = codec->driver->remove(codec);
905 if (err < 0)
906 dev_err(codec->dev,
907 "asoc: failed to remove %s: %d\n",
908 codec->name, err);
909 }
910
911 /* Make sure all DAPM widgets are freed */
912 snd_soc_dapm_free(&codec->dapm);
913
914 soc_cleanup_codec_debugfs(codec);
915 codec->probed = 0;
916 list_del(&codec->card_list);
917 module_put(codec->dev->driver->owner);
918}
919
920static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
921{
922 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
923 struct snd_soc_codec *codec = rtd->codec;
924 struct snd_soc_platform *platform = rtd->platform;
925 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
926 int err;
927
928 /* unregister the rtd device */
929 if (rtd->dev_registered) {
930 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
931 device_remove_file(rtd->dev, &dev_attr_codec_reg);
932 device_unregister(rtd->dev);
933 rtd->dev_registered = 0;
934 }
935
936 /* remove the CODEC DAI */
937 if (codec_dai && codec_dai->probed &&
938 codec_dai->driver->remove_order == order) {
939 if (codec_dai->driver->remove) {
940 err = codec_dai->driver->remove(codec_dai);
941 if (err < 0)
942 pr_err("asoc: failed to remove %s: %d\n",
943 codec_dai->name, err);
944 }
945 codec_dai->probed = 0;
946 list_del(&codec_dai->card_list);
947 }
948
949 /* remove the platform */
950 if (platform && platform->probed &&
951 platform->driver->remove_order == order) {
952 if (platform->driver->remove) {
953 err = platform->driver->remove(platform);
954 if (err < 0)
955 pr_err("asoc: failed to remove %s: %d\n",
956 platform->name, err);
957 }
958
959 /* Make sure all DAPM widgets are freed */
960 snd_soc_dapm_free(&platform->dapm);
961
962 soc_cleanup_platform_debugfs(platform);
963 platform->probed = 0;
964 list_del(&platform->card_list);
965 module_put(platform->dev->driver->owner);
966 }
967
968 /* remove the CODEC */
969 if (codec && codec->probed &&
970 codec->driver->remove_order == order)
971 soc_remove_codec(codec);
972
973 /* remove the cpu_dai */
974 if (cpu_dai && cpu_dai->probed &&
975 cpu_dai->driver->remove_order == order) {
976 if (cpu_dai->driver->remove) {
977 err = cpu_dai->driver->remove(cpu_dai);
978 if (err < 0)
979 pr_err("asoc: failed to remove %s: %d\n",
980 cpu_dai->name, err);
981 }
982 cpu_dai->probed = 0;
983 list_del(&cpu_dai->card_list);
984 module_put(cpu_dai->dev->driver->owner);
985 }
986}
987
988static void soc_remove_dai_links(struct snd_soc_card *card)
989{
990 int dai, order;
991
992 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
993 order++) {
994 for (dai = 0; dai < card->num_rtd; dai++)
995 soc_remove_dai_link(card, dai, order);
996 }
997 card->num_rtd = 0;
998}
999
1000static void soc_set_name_prefix(struct snd_soc_card *card,
1001 struct snd_soc_codec *codec)
1002{
1003 int i;
1004
1005 if (card->codec_conf == NULL)
1006 return;
1007
1008 for (i = 0; i < card->num_configs; i++) {
1009 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1010 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1011 codec->name_prefix = map->name_prefix;
1012 break;
1013 }
1014 }
1015}
1016
1017static int soc_probe_codec(struct snd_soc_card *card,
1018 struct snd_soc_codec *codec)
1019{
1020 int ret = 0;
1021 const struct snd_soc_codec_driver *driver = codec->driver;
1022 struct snd_soc_dai *dai;
1023
1024 codec->card = card;
1025 codec->dapm.card = card;
1026 soc_set_name_prefix(card, codec);
1027
1028 if (!try_module_get(codec->dev->driver->owner))
1029 return -ENODEV;
1030
1031 soc_init_codec_debugfs(codec);
1032
1033 if (driver->dapm_widgets)
1034 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1035 driver->num_dapm_widgets);
1036
1037 /* Create DAPM widgets for each DAI stream */
1038 list_for_each_entry(dai, &dai_list, list) {
1039 if (dai->dev != codec->dev)
1040 continue;
1041
1042 snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1043 }
1044
1045 codec->dapm.idle_bias_off = driver->idle_bias_off;
1046
1047 if (driver->probe) {
1048 ret = driver->probe(codec);
1049 if (ret < 0) {
1050 dev_err(codec->dev,
1051 "asoc: failed to probe CODEC %s: %d\n",
1052 codec->name, ret);
1053 goto err_probe;
1054 }
1055 }
1056
1057 if (driver->controls)
1058 snd_soc_add_codec_controls(codec, driver->controls,
1059 driver->num_controls);
1060 if (driver->dapm_routes)
1061 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1062 driver->num_dapm_routes);
1063
1064 /* mark codec as probed and add to card codec list */
1065 codec->probed = 1;
1066 list_add(&codec->card_list, &card->codec_dev_list);
1067 list_add(&codec->dapm.list, &card->dapm_list);
1068
1069 return 0;
1070
1071err_probe:
1072 soc_cleanup_codec_debugfs(codec);
1073 module_put(codec->dev->driver->owner);
1074
1075 return ret;
1076}
1077
1078static int soc_probe_platform(struct snd_soc_card *card,
1079 struct snd_soc_platform *platform)
1080{
1081 int ret = 0;
1082 const struct snd_soc_platform_driver *driver = platform->driver;
1083 struct snd_soc_dai *dai;
1084
1085 platform->card = card;
1086 platform->dapm.card = card;
1087
1088 if (!try_module_get(platform->dev->driver->owner))
1089 return -ENODEV;
1090
1091 soc_init_platform_debugfs(platform);
1092
1093 if (driver->dapm_widgets)
1094 snd_soc_dapm_new_controls(&platform->dapm,
1095 driver->dapm_widgets, driver->num_dapm_widgets);
1096
1097 /* Create DAPM widgets for each DAI stream */
1098 list_for_each_entry(dai, &dai_list, list) {
1099 if (dai->dev != platform->dev)
1100 continue;
1101
1102 snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1103 }
1104
1105 platform->dapm.idle_bias_off = 1;
1106
1107 if (driver->probe) {
1108 ret = driver->probe(platform);
1109 if (ret < 0) {
1110 dev_err(platform->dev,
1111 "asoc: failed to probe platform %s: %d\n",
1112 platform->name, ret);
1113 goto err_probe;
1114 }
1115 }
1116
1117 if (driver->controls)
1118 snd_soc_add_platform_controls(platform, driver->controls,
1119 driver->num_controls);
1120 if (driver->dapm_routes)
1121 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1122 driver->num_dapm_routes);
1123
1124 /* mark platform as probed and add to card platform list */
1125 platform->probed = 1;
1126 list_add(&platform->card_list, &card->platform_dev_list);
1127 list_add(&platform->dapm.list, &card->dapm_list);
1128
1129 return 0;
1130
1131err_probe:
1132 soc_cleanup_platform_debugfs(platform);
1133 module_put(platform->dev->driver->owner);
1134
1135 return ret;
1136}
1137
1138static void rtd_release(struct device *dev)
1139{
1140 kfree(dev);
1141}
1142
1143static int soc_post_component_init(struct snd_soc_card *card,
1144 struct snd_soc_codec *codec,
1145 int num, int dailess)
1146{
1147 struct snd_soc_dai_link *dai_link = NULL;
1148 struct snd_soc_aux_dev *aux_dev = NULL;
1149 struct snd_soc_pcm_runtime *rtd;
1150 const char *temp, *name;
1151 int ret = 0;
1152
1153 if (!dailess) {
1154 dai_link = &card->dai_link[num];
1155 rtd = &card->rtd[num];
1156 name = dai_link->name;
1157 } else {
1158 aux_dev = &card->aux_dev[num];
1159 rtd = &card->rtd_aux[num];
1160 name = aux_dev->name;
1161 }
1162 rtd->card = card;
1163
1164 /* Make sure all DAPM widgets are instantiated */
1165 snd_soc_dapm_new_widgets(&codec->dapm);
1166
1167 /* machine controls, routes and widgets are not prefixed */
1168 temp = codec->name_prefix;
1169 codec->name_prefix = NULL;
1170
1171 /* do machine specific initialization */
1172 if (!dailess && dai_link->init)
1173 ret = dai_link->init(rtd);
1174 else if (dailess && aux_dev->init)
1175 ret = aux_dev->init(&codec->dapm);
1176 if (ret < 0) {
1177 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1178 return ret;
1179 }
1180 codec->name_prefix = temp;
1181
1182 /* register the rtd device */
1183 rtd->codec = codec;
1184
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 = card->dev;
1190 rtd->dev->release = rtd_release;
1191 rtd->dev->init_name = name;
1192 dev_set_drvdata(rtd->dev, rtd);
1193 mutex_init(&rtd->pcm_mutex);
1194 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1195 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1196 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1197 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1198 ret = device_add(rtd->dev);
1199 if (ret < 0) {
1200 dev_err(card->dev,
1201 "asoc: failed to register runtime device: %d\n", ret);
1202 return ret;
1203 }
1204 rtd->dev_registered = 1;
1205
1206 /* add DAPM sysfs entries for this codec */
1207 ret = snd_soc_dapm_sys_add(rtd->dev);
1208 if (ret < 0)
1209 dev_err(codec->dev,
1210 "asoc: failed to add codec dapm sysfs entries: %d\n",
1211 ret);
1212
1213 /* add codec sysfs entries */
1214 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1215 if (ret < 0)
1216 dev_err(codec->dev,
1217 "asoc: failed to add codec sysfs files: %d\n", ret);
1218
1219#ifdef CONFIG_DEBUG_FS
1220 /* add DPCM sysfs entries */
1221 if (!dailess && !dai_link->dynamic)
1222 goto out;
1223
1224 ret = soc_dpcm_debugfs_add(rtd);
1225 if (ret < 0)
1226 dev_err(rtd->dev, "asoc: failed to add dpcm sysfs entries: %d\n", ret);
1227
1228out:
1229#endif
1230 return 0;
1231}
1232
1233static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order)
1234{
1235 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1236 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1237 struct snd_soc_codec *codec = rtd->codec;
1238 struct snd_soc_platform *platform = rtd->platform;
1239 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1240 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1241 struct snd_soc_dapm_widget *play_w, *capture_w;
1242 int ret;
1243
1244 dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1245 card->name, num, order);
1246
1247 /* config components */
1248 cpu_dai->platform = platform;
1249 codec_dai->card = card;
1250 cpu_dai->card = card;
1251
1252 /* set default power off timeout */
1253 rtd->pmdown_time = pmdown_time;
1254
1255 /* probe the cpu_dai */
1256 if (!cpu_dai->probed &&
1257 cpu_dai->driver->probe_order == order) {
1258 cpu_dai->dapm.card = card;
1259 if (!try_module_get(cpu_dai->dev->driver->owner))
1260 return -ENODEV;
1261
1262 snd_soc_dapm_new_dai_widgets(&cpu_dai->dapm, cpu_dai);
1263
1264 if (cpu_dai->driver->probe) {
1265 ret = cpu_dai->driver->probe(cpu_dai);
1266 if (ret < 0) {
1267 pr_err("asoc: failed to probe CPU DAI %s: %d\n",
1268 cpu_dai->name, ret);
1269 module_put(cpu_dai->dev->driver->owner);
1270 return ret;
1271 }
1272 }
1273 cpu_dai->probed = 1;
1274 /* mark cpu_dai as probed and add to card dai list */
1275 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1276 }
1277
1278 /* probe the CODEC */
1279 if (!codec->probed &&
1280 codec->driver->probe_order == order) {
1281 ret = soc_probe_codec(card, codec);
1282 if (ret < 0)
1283 return ret;
1284 }
1285
1286 /* probe the platform */
1287 if (!platform->probed &&
1288 platform->driver->probe_order == order) {
1289 ret = soc_probe_platform(card, platform);
1290 if (ret < 0)
1291 return ret;
1292 }
1293
1294 /* probe the CODEC DAI */
1295 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1296 if (codec_dai->driver->probe) {
1297 ret = codec_dai->driver->probe(codec_dai);
1298 if (ret < 0) {
1299 pr_err("asoc: failed to probe CODEC DAI %s: %d\n",
1300 codec_dai->name, ret);
1301 return ret;
1302 }
1303 }
1304
1305 /* mark codec_dai as probed and add to card dai list */
1306 codec_dai->probed = 1;
1307 list_add(&codec_dai->card_list, &card->dai_dev_list);
1308 }
1309
1310 /* complete DAI probe during last probe */
1311 if (order != SND_SOC_COMP_ORDER_LAST)
1312 return 0;
1313
1314 ret = soc_post_component_init(card, codec, num, 0);
1315 if (ret)
1316 return ret;
1317
1318 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1319 if (ret < 0)
1320 pr_warn("asoc: failed to add pmdown_time sysfs:%d\n", ret);
1321
1322 if (!dai_link->params) {
1323 /* create the pcm */
1324 ret = soc_new_pcm(rtd, num);
1325 if (ret < 0) {
1326 pr_err("asoc: can't create pcm %s :%d\n",
1327 dai_link->stream_name, ret);
1328 return ret;
1329 }
1330 } else {
1331 /* link the DAI widgets */
1332 play_w = codec_dai->playback_widget;
1333 capture_w = cpu_dai->capture_widget;
1334 if (play_w && capture_w) {
1335 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1336 capture_w, play_w);
1337 if (ret != 0) {
1338 dev_err(card->dev, "Can't link %s to %s: %d\n",
1339 play_w->name, capture_w->name, ret);
1340 return ret;
1341 }
1342 }
1343
1344 play_w = cpu_dai->playback_widget;
1345 capture_w = codec_dai->capture_widget;
1346 if (play_w && capture_w) {
1347 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1348 capture_w, play_w);
1349 if (ret != 0) {
1350 dev_err(card->dev, "Can't link %s to %s: %d\n",
1351 play_w->name, capture_w->name, ret);
1352 return ret;
1353 }
1354 }
1355 }
1356
1357 /* add platform data for AC97 devices */
1358 if (rtd->codec_dai->driver->ac97_control)
1359 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1360
1361 return 0;
1362}
1363
1364#ifdef CONFIG_SND_SOC_AC97_BUS
1365static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1366{
1367 int ret;
1368
1369 /* Only instantiate AC97 if not already done by the adaptor
1370 * for the generic AC97 subsystem.
1371 */
1372 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1373 /*
1374 * It is possible that the AC97 device is already registered to
1375 * the device subsystem. This happens when the device is created
1376 * via snd_ac97_mixer(). Currently only SoC codec that does so
1377 * is the generic AC97 glue but others migh emerge.
1378 *
1379 * In those cases we don't try to register the device again.
1380 */
1381 if (!rtd->codec->ac97_created)
1382 return 0;
1383
1384 ret = soc_ac97_dev_register(rtd->codec);
1385 if (ret < 0) {
1386 pr_err("asoc: AC97 device register failed:%d\n", ret);
1387 return ret;
1388 }
1389
1390 rtd->codec->ac97_registered = 1;
1391 }
1392 return 0;
1393}
1394
1395static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1396{
1397 if (codec->ac97_registered) {
1398 soc_ac97_dev_unregister(codec);
1399 codec->ac97_registered = 0;
1400 }
1401}
1402#endif
1403
1404static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1405{
1406 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1407 struct snd_soc_codec *codec;
1408
1409 /* find CODEC from registered CODECs*/
1410 list_for_each_entry(codec, &codec_list, list) {
1411 if (!strcmp(codec->name, aux_dev->codec_name))
1412 return 0;
1413 }
1414
1415 return -EPROBE_DEFER;
1416}
1417
1418static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1419{
1420 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1421 struct snd_soc_codec *codec;
1422 int ret = -ENODEV;
1423
1424 /* find CODEC from registered CODECs*/
1425 list_for_each_entry(codec, &codec_list, list) {
1426 if (!strcmp(codec->name, aux_dev->codec_name)) {
1427 if (codec->probed) {
1428 dev_err(codec->dev,
1429 "asoc: codec already probed");
1430 ret = -EBUSY;
1431 goto out;
1432 }
1433 goto found;
1434 }
1435 }
1436 /* codec not found */
1437 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1438 return -EPROBE_DEFER;
1439
1440found:
1441 ret = soc_probe_codec(card, codec);
1442 if (ret < 0)
1443 return ret;
1444
1445 ret = soc_post_component_init(card, codec, num, 1);
1446
1447out:
1448 return ret;
1449}
1450
1451static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1452{
1453 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1454 struct snd_soc_codec *codec = rtd->codec;
1455
1456 /* unregister the rtd device */
1457 if (rtd->dev_registered) {
1458 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1459 device_del(rtd->dev);
1460 rtd->dev_registered = 0;
1461 }
1462
1463 if (codec && codec->probed)
1464 soc_remove_codec(codec);
1465}
1466
1467static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1468 enum snd_soc_compress_type compress_type)
1469{
1470 int ret;
1471
1472 if (codec->cache_init)
1473 return 0;
1474
1475 /* override the compress_type if necessary */
1476 if (compress_type && codec->compress_type != compress_type)
1477 codec->compress_type = compress_type;
1478 ret = snd_soc_cache_init(codec);
1479 if (ret < 0) {
1480 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1481 ret);
1482 return ret;
1483 }
1484 codec->cache_init = 1;
1485 return 0;
1486}
1487
1488static int snd_soc_instantiate_card(struct snd_soc_card *card)
1489{
1490 struct snd_soc_codec *codec;
1491 struct snd_soc_codec_conf *codec_conf;
1492 enum snd_soc_compress_type compress_type;
1493 struct snd_soc_dai_link *dai_link;
1494 int ret, i, order, dai_fmt;
1495
1496 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1497
1498 /* bind DAIs */
1499 for (i = 0; i < card->num_links; i++) {
1500 ret = soc_bind_dai_link(card, i);
1501 if (ret != 0)
1502 goto base_error;
1503 }
1504
1505 /* check aux_devs too */
1506 for (i = 0; i < card->num_aux_devs; i++) {
1507 ret = soc_check_aux_dev(card, i);
1508 if (ret != 0)
1509 goto base_error;
1510 }
1511
1512 /* initialize the register cache for each available codec */
1513 list_for_each_entry(codec, &codec_list, list) {
1514 if (codec->cache_init)
1515 continue;
1516 /* by default we don't override the compress_type */
1517 compress_type = 0;
1518 /* check to see if we need to override the compress_type */
1519 for (i = 0; i < card->num_configs; ++i) {
1520 codec_conf = &card->codec_conf[i];
1521 if (!strcmp(codec->name, codec_conf->dev_name)) {
1522 compress_type = codec_conf->compress_type;
1523 if (compress_type && compress_type
1524 != codec->compress_type)
1525 break;
1526 }
1527 }
1528 ret = snd_soc_init_codec_cache(codec, compress_type);
1529 if (ret < 0)
1530 goto base_error;
1531 }
1532
1533 /* card bind complete so register a sound card */
1534 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1535 card->owner, 0, &card->snd_card);
1536 if (ret < 0) {
1537 pr_err("asoc: can't create sound card for card %s: %d\n",
1538 card->name, ret);
1539 goto base_error;
1540 }
1541 card->snd_card->dev = card->dev;
1542
1543 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1544 card->dapm.dev = card->dev;
1545 card->dapm.card = card;
1546 list_add(&card->dapm.list, &card->dapm_list);
1547
1548#ifdef CONFIG_DEBUG_FS
1549 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1550#endif
1551
1552#ifdef CONFIG_PM_SLEEP
1553 /* deferred resume work */
1554 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1555#endif
1556
1557 if (card->dapm_widgets)
1558 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1559 card->num_dapm_widgets);
1560
1561 /* initialise the sound card only once */
1562 if (card->probe) {
1563 ret = card->probe(card);
1564 if (ret < 0)
1565 goto card_probe_error;
1566 }
1567
1568 /* early DAI link probe */
1569 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1570 order++) {
1571 for (i = 0; i < card->num_links; i++) {
1572 ret = soc_probe_dai_link(card, i, order);
1573 if (ret < 0) {
1574 pr_err("asoc: failed to instantiate card %s: %d\n",
1575 card->name, ret);
1576 goto probe_dai_err;
1577 }
1578 }
1579 }
1580
1581 for (i = 0; i < card->num_aux_devs; i++) {
1582 ret = soc_probe_aux_dev(card, i);
1583 if (ret < 0) {
1584 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1585 card->name, ret);
1586 goto probe_aux_dev_err;
1587 }
1588 }
1589
1590 snd_soc_dapm_link_dai_widgets(card);
1591
1592 if (card->controls)
1593 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1594
1595 if (card->dapm_routes)
1596 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1597 card->num_dapm_routes);
1598
1599 snd_soc_dapm_new_widgets(&card->dapm);
1600
1601 for (i = 0; i < card->num_links; i++) {
1602 dai_link = &card->dai_link[i];
1603 dai_fmt = dai_link->dai_fmt;
1604
1605 if (dai_fmt) {
1606 ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1607 dai_fmt);
1608 if (ret != 0 && ret != -ENOTSUPP)
1609 dev_warn(card->rtd[i].codec_dai->dev,
1610 "Failed to set DAI format: %d\n",
1611 ret);
1612 }
1613
1614 /* If this is a regular CPU link there will be a platform */
1615 if (dai_fmt &&
1616 (dai_link->platform_name || dai_link->platform_of_node)) {
1617 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1618 dai_fmt);
1619 if (ret != 0 && ret != -ENOTSUPP)
1620 dev_warn(card->rtd[i].cpu_dai->dev,
1621 "Failed to set DAI format: %d\n",
1622 ret);
1623 } else if (dai_fmt) {
1624 /* Flip the polarity for the "CPU" end */
1625 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1626 switch (dai_link->dai_fmt &
1627 SND_SOC_DAIFMT_MASTER_MASK) {
1628 case SND_SOC_DAIFMT_CBM_CFM:
1629 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1630 break;
1631 case SND_SOC_DAIFMT_CBM_CFS:
1632 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1633 break;
1634 case SND_SOC_DAIFMT_CBS_CFM:
1635 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1636 break;
1637 case SND_SOC_DAIFMT_CBS_CFS:
1638 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1639 break;
1640 }
1641
1642 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1643 dai_fmt);
1644 if (ret != 0 && ret != -ENOTSUPP)
1645 dev_warn(card->rtd[i].cpu_dai->dev,
1646 "Failed to set DAI format: %d\n",
1647 ret);
1648 }
1649 }
1650
1651 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1652 "%s", card->name);
1653 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1654 "%s", card->long_name ? card->long_name : card->name);
1655 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1656 "%s", card->driver_name ? card->driver_name : card->name);
1657 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1658 switch (card->snd_card->driver[i]) {
1659 case '_':
1660 case '-':
1661 case '\0':
1662 break;
1663 default:
1664 if (!isalnum(card->snd_card->driver[i]))
1665 card->snd_card->driver[i] = '_';
1666 break;
1667 }
1668 }
1669
1670 if (card->late_probe) {
1671 ret = card->late_probe(card);
1672 if (ret < 0) {
1673 dev_err(card->dev, "%s late_probe() failed: %d\n",
1674 card->name, ret);
1675 goto probe_aux_dev_err;
1676 }
1677 }
1678
1679 snd_soc_dapm_new_widgets(&card->dapm);
1680
1681 if (card->fully_routed)
1682 list_for_each_entry(codec, &card->codec_dev_list, card_list)
1683 snd_soc_dapm_auto_nc_codec_pins(codec);
1684
1685 ret = snd_card_register(card->snd_card);
1686 if (ret < 0) {
1687 pr_err("asoc: failed to register soundcard for %s: %d\n",
1688 card->name, ret);
1689 goto probe_aux_dev_err;
1690 }
1691
1692#ifdef CONFIG_SND_SOC_AC97_BUS
1693 /* register any AC97 codecs */
1694 for (i = 0; i < card->num_rtd; i++) {
1695 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1696 if (ret < 0) {
1697 pr_err("asoc: failed to register AC97 %s: %d\n",
1698 card->name, ret);
1699 while (--i >= 0)
1700 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1701 goto probe_aux_dev_err;
1702 }
1703 }
1704#endif
1705
1706 card->instantiated = 1;
1707 snd_soc_dapm_sync(&card->dapm);
1708 mutex_unlock(&card->mutex);
1709
1710 return 0;
1711
1712probe_aux_dev_err:
1713 for (i = 0; i < card->num_aux_devs; i++)
1714 soc_remove_aux_dev(card, i);
1715
1716probe_dai_err:
1717 soc_remove_dai_links(card);
1718
1719card_probe_error:
1720 if (card->remove)
1721 card->remove(card);
1722
1723 snd_card_free(card->snd_card);
1724
1725base_error:
1726 mutex_unlock(&card->mutex);
1727
1728 return ret;
1729}
1730
1731/* probes a new socdev */
1732static int soc_probe(struct platform_device *pdev)
1733{
1734 struct snd_soc_card *card = platform_get_drvdata(pdev);
1735 int ret = 0;
1736
1737 /*
1738 * no card, so machine driver should be registering card
1739 * we should not be here in that case so ret error
1740 */
1741 if (!card)
1742 return -EINVAL;
1743
1744 dev_warn(&pdev->dev,
1745 "ASoC machine %s should use snd_soc_register_card()\n",
1746 card->name);
1747
1748 /* Bodge while we unpick instantiation */
1749 card->dev = &pdev->dev;
1750
1751 ret = snd_soc_register_card(card);
1752 if (ret != 0) {
1753 dev_err(&pdev->dev, "Failed to register card\n");
1754 return ret;
1755 }
1756
1757 return 0;
1758}
1759
1760static int soc_cleanup_card_resources(struct snd_soc_card *card)
1761{
1762 int i;
1763
1764 /* make sure any delayed work runs */
1765 for (i = 0; i < card->num_rtd; i++) {
1766 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1767 flush_delayed_work_sync(&rtd->delayed_work);
1768 }
1769
1770 /* remove auxiliary devices */
1771 for (i = 0; i < card->num_aux_devs; i++)
1772 soc_remove_aux_dev(card, i);
1773
1774 /* remove and free each DAI */
1775 soc_remove_dai_links(card);
1776
1777 soc_cleanup_card_debugfs(card);
1778
1779 /* remove the card */
1780 if (card->remove)
1781 card->remove(card);
1782
1783 snd_soc_dapm_free(&card->dapm);
1784
1785 snd_card_free(card->snd_card);
1786 return 0;
1787
1788}
1789
1790/* removes a socdev */
1791static int soc_remove(struct platform_device *pdev)
1792{
1793 struct snd_soc_card *card = platform_get_drvdata(pdev);
1794
1795 snd_soc_unregister_card(card);
1796 return 0;
1797}
1798
1799int snd_soc_poweroff(struct device *dev)
1800{
1801 struct snd_soc_card *card = dev_get_drvdata(dev);
1802 int i;
1803
1804 if (!card->instantiated)
1805 return 0;
1806
1807 /* Flush out pmdown_time work - we actually do want to run it
1808 * now, we're shutting down so no imminent restart. */
1809 for (i = 0; i < card->num_rtd; i++) {
1810 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1811 flush_delayed_work_sync(&rtd->delayed_work);
1812 }
1813
1814 snd_soc_dapm_shutdown(card);
1815
1816 return 0;
1817}
1818EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1819
1820const struct dev_pm_ops snd_soc_pm_ops = {
1821 .suspend = snd_soc_suspend,
1822 .resume = snd_soc_resume,
1823 .freeze = snd_soc_suspend,
1824 .thaw = snd_soc_resume,
1825 .poweroff = snd_soc_poweroff,
1826 .restore = snd_soc_resume,
1827};
1828EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1829
1830/* ASoC platform driver */
1831static struct platform_driver soc_driver = {
1832 .driver = {
1833 .name = "soc-audio",
1834 .owner = THIS_MODULE,
1835 .pm = &snd_soc_pm_ops,
1836 },
1837 .probe = soc_probe,
1838 .remove = soc_remove,
1839};
1840
1841/**
1842 * snd_soc_codec_volatile_register: Report if a register is volatile.
1843 *
1844 * @codec: CODEC to query.
1845 * @reg: Register to query.
1846 *
1847 * Boolean function indiciating if a CODEC register is volatile.
1848 */
1849int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1850 unsigned int reg)
1851{
1852 if (codec->volatile_register)
1853 return codec->volatile_register(codec, reg);
1854 else
1855 return 0;
1856}
1857EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1858
1859/**
1860 * snd_soc_codec_readable_register: Report if a register is readable.
1861 *
1862 * @codec: CODEC to query.
1863 * @reg: Register to query.
1864 *
1865 * Boolean function indicating if a CODEC register is readable.
1866 */
1867int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1868 unsigned int reg)
1869{
1870 if (codec->readable_register)
1871 return codec->readable_register(codec, reg);
1872 else
1873 return 1;
1874}
1875EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1876
1877/**
1878 * snd_soc_codec_writable_register: Report if a register is writable.
1879 *
1880 * @codec: CODEC to query.
1881 * @reg: Register to query.
1882 *
1883 * Boolean function indicating if a CODEC register is writable.
1884 */
1885int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1886 unsigned int reg)
1887{
1888 if (codec->writable_register)
1889 return codec->writable_register(codec, reg);
1890 else
1891 return 1;
1892}
1893EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1894
1895int snd_soc_platform_read(struct snd_soc_platform *platform,
1896 unsigned int reg)
1897{
1898 unsigned int ret;
1899
1900 if (!platform->driver->read) {
1901 dev_err(platform->dev, "platform has no read back\n");
1902 return -1;
1903 }
1904
1905 ret = platform->driver->read(platform, reg);
1906 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
1907 trace_snd_soc_preg_read(platform, reg, ret);
1908
1909 return ret;
1910}
1911EXPORT_SYMBOL_GPL(snd_soc_platform_read);
1912
1913int snd_soc_platform_write(struct snd_soc_platform *platform,
1914 unsigned int reg, unsigned int val)
1915{
1916 if (!platform->driver->write) {
1917 dev_err(platform->dev, "platform has no write back\n");
1918 return -1;
1919 }
1920
1921 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
1922 trace_snd_soc_preg_write(platform, reg, val);
1923 return platform->driver->write(platform, reg, val);
1924}
1925EXPORT_SYMBOL_GPL(snd_soc_platform_write);
1926
1927/**
1928 * snd_soc_new_ac97_codec - initailise AC97 device
1929 * @codec: audio codec
1930 * @ops: AC97 bus operations
1931 * @num: AC97 codec number
1932 *
1933 * Initialises AC97 codec resources for use by ad-hoc devices only.
1934 */
1935int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1936 struct snd_ac97_bus_ops *ops, int num)
1937{
1938 mutex_lock(&codec->mutex);
1939
1940 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1941 if (codec->ac97 == NULL) {
1942 mutex_unlock(&codec->mutex);
1943 return -ENOMEM;
1944 }
1945
1946 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1947 if (codec->ac97->bus == NULL) {
1948 kfree(codec->ac97);
1949 codec->ac97 = NULL;
1950 mutex_unlock(&codec->mutex);
1951 return -ENOMEM;
1952 }
1953
1954 codec->ac97->bus->ops = ops;
1955 codec->ac97->num = num;
1956
1957 /*
1958 * Mark the AC97 device to be created by us. This way we ensure that the
1959 * device will be registered with the device subsystem later on.
1960 */
1961 codec->ac97_created = 1;
1962
1963 mutex_unlock(&codec->mutex);
1964 return 0;
1965}
1966EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1967
1968/**
1969 * snd_soc_free_ac97_codec - free AC97 codec device
1970 * @codec: audio codec
1971 *
1972 * Frees AC97 codec device resources.
1973 */
1974void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1975{
1976 mutex_lock(&codec->mutex);
1977#ifdef CONFIG_SND_SOC_AC97_BUS
1978 soc_unregister_ac97_dai_link(codec);
1979#endif
1980 kfree(codec->ac97->bus);
1981 kfree(codec->ac97);
1982 codec->ac97 = NULL;
1983 codec->ac97_created = 0;
1984 mutex_unlock(&codec->mutex);
1985}
1986EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1987
1988unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
1989{
1990 unsigned int ret;
1991
1992 ret = codec->read(codec, reg);
1993 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1994 trace_snd_soc_reg_read(codec, reg, ret);
1995
1996 return ret;
1997}
1998EXPORT_SYMBOL_GPL(snd_soc_read);
1999
2000unsigned int snd_soc_write(struct snd_soc_codec *codec,
2001 unsigned int reg, unsigned int val)
2002{
2003 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2004 trace_snd_soc_reg_write(codec, reg, val);
2005 return codec->write(codec, reg, val);
2006}
2007EXPORT_SYMBOL_GPL(snd_soc_write);
2008
2009unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2010 unsigned int reg, const void *data, size_t len)
2011{
2012 return codec->bulk_write_raw(codec, reg, data, len);
2013}
2014EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2015
2016/**
2017 * snd_soc_update_bits - update codec register bits
2018 * @codec: audio codec
2019 * @reg: codec register
2020 * @mask: register mask
2021 * @value: new value
2022 *
2023 * Writes new register value.
2024 *
2025 * Returns 1 for change, 0 for no change, or negative error code.
2026 */
2027int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2028 unsigned int mask, unsigned int value)
2029{
2030 bool change;
2031 unsigned int old, new;
2032 int ret;
2033
2034 if (codec->using_regmap) {
2035 ret = regmap_update_bits_check(codec->control_data, reg,
2036 mask, value, &change);
2037 } else {
2038 ret = snd_soc_read(codec, reg);
2039 if (ret < 0)
2040 return ret;
2041
2042 old = ret;
2043 new = (old & ~mask) | (value & mask);
2044 change = old != new;
2045 if (change)
2046 ret = snd_soc_write(codec, reg, new);
2047 }
2048
2049 if (ret < 0)
2050 return ret;
2051
2052 return change;
2053}
2054EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2055
2056/**
2057 * snd_soc_update_bits_locked - update codec register bits
2058 * @codec: audio codec
2059 * @reg: codec register
2060 * @mask: register mask
2061 * @value: new value
2062 *
2063 * Writes new register value, and takes the codec mutex.
2064 *
2065 * Returns 1 for change else 0.
2066 */
2067int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2068 unsigned short reg, unsigned int mask,
2069 unsigned int value)
2070{
2071 int change;
2072
2073 mutex_lock(&codec->mutex);
2074 change = snd_soc_update_bits(codec, reg, mask, value);
2075 mutex_unlock(&codec->mutex);
2076
2077 return change;
2078}
2079EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2080
2081/**
2082 * snd_soc_test_bits - test register for change
2083 * @codec: audio codec
2084 * @reg: codec register
2085 * @mask: register mask
2086 * @value: new value
2087 *
2088 * Tests a register with a new value and checks if the new value is
2089 * different from the old value.
2090 *
2091 * Returns 1 for change else 0.
2092 */
2093int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2094 unsigned int mask, unsigned int value)
2095{
2096 int change;
2097 unsigned int old, new;
2098
2099 old = snd_soc_read(codec, reg);
2100 new = (old & ~mask) | value;
2101 change = old != new;
2102
2103 return change;
2104}
2105EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2106
2107/**
2108 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2109 * @substream: the pcm substream
2110 * @hw: the hardware parameters
2111 *
2112 * Sets the substream runtime hardware parameters.
2113 */
2114int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2115 const struct snd_pcm_hardware *hw)
2116{
2117 struct snd_pcm_runtime *runtime = substream->runtime;
2118 runtime->hw.info = hw->info;
2119 runtime->hw.formats = hw->formats;
2120 runtime->hw.period_bytes_min = hw->period_bytes_min;
2121 runtime->hw.period_bytes_max = hw->period_bytes_max;
2122 runtime->hw.periods_min = hw->periods_min;
2123 runtime->hw.periods_max = hw->periods_max;
2124 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2125 runtime->hw.fifo_size = hw->fifo_size;
2126 return 0;
2127}
2128EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2129
2130/**
2131 * snd_soc_cnew - create new control
2132 * @_template: control template
2133 * @data: control private data
2134 * @long_name: control long name
2135 * @prefix: control name prefix
2136 *
2137 * Create a new mixer control from a template control.
2138 *
2139 * Returns 0 for success, else error.
2140 */
2141struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2142 void *data, const char *long_name,
2143 const char *prefix)
2144{
2145 struct snd_kcontrol_new template;
2146 struct snd_kcontrol *kcontrol;
2147 char *name = NULL;
2148 int name_len;
2149
2150 memcpy(&template, _template, sizeof(template));
2151 template.index = 0;
2152
2153 if (!long_name)
2154 long_name = template.name;
2155
2156 if (prefix) {
2157 name_len = strlen(long_name) + strlen(prefix) + 2;
2158 name = kmalloc(name_len, GFP_KERNEL);
2159 if (!name)
2160 return NULL;
2161
2162 snprintf(name, name_len, "%s %s", prefix, long_name);
2163
2164 template.name = name;
2165 } else {
2166 template.name = long_name;
2167 }
2168
2169 kcontrol = snd_ctl_new1(&template, data);
2170
2171 kfree(name);
2172
2173 return kcontrol;
2174}
2175EXPORT_SYMBOL_GPL(snd_soc_cnew);
2176
2177static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2178 const struct snd_kcontrol_new *controls, int num_controls,
2179 const char *prefix, void *data)
2180{
2181 int err, i;
2182
2183 for (i = 0; i < num_controls; i++) {
2184 const struct snd_kcontrol_new *control = &controls[i];
2185 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2186 control->name, prefix));
2187 if (err < 0) {
2188 dev_err(dev, "Failed to add %s: %d\n", control->name, err);
2189 return err;
2190 }
2191 }
2192
2193 return 0;
2194}
2195
2196/**
2197 * snd_soc_add_codec_controls - add an array of controls to a codec.
2198 * Convenience function to add a list of controls. Many codecs were
2199 * duplicating this code.
2200 *
2201 * @codec: codec to add controls to
2202 * @controls: array of controls to add
2203 * @num_controls: number of elements in the array
2204 *
2205 * Return 0 for success, else error.
2206 */
2207int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2208 const struct snd_kcontrol_new *controls, int num_controls)
2209{
2210 struct snd_card *card = codec->card->snd_card;
2211
2212 return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2213 codec->name_prefix, codec);
2214}
2215EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2216
2217/**
2218 * snd_soc_add_platform_controls - add an array of controls to a platform.
2219 * Convenience function to add a list of controls.
2220 *
2221 * @platform: platform to add controls to
2222 * @controls: array of controls to add
2223 * @num_controls: number of elements in the array
2224 *
2225 * Return 0 for success, else error.
2226 */
2227int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2228 const struct snd_kcontrol_new *controls, int num_controls)
2229{
2230 struct snd_card *card = platform->card->snd_card;
2231
2232 return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2233 NULL, platform);
2234}
2235EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2236
2237/**
2238 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2239 * Convenience function to add a list of controls.
2240 *
2241 * @soc_card: SoC card to add controls to
2242 * @controls: array of controls to add
2243 * @num_controls: number of elements in the array
2244 *
2245 * Return 0 for success, else error.
2246 */
2247int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2248 const struct snd_kcontrol_new *controls, int num_controls)
2249{
2250 struct snd_card *card = soc_card->snd_card;
2251
2252 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2253 NULL, soc_card);
2254}
2255EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2256
2257/**
2258 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2259 * Convienience function to add a list of controls.
2260 *
2261 * @dai: DAI to add controls to
2262 * @controls: array of controls to add
2263 * @num_controls: number of elements in the array
2264 *
2265 * Return 0 for success, else error.
2266 */
2267int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2268 const struct snd_kcontrol_new *controls, int num_controls)
2269{
2270 struct snd_card *card = dai->card->snd_card;
2271
2272 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2273 NULL, dai);
2274}
2275EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2276
2277/**
2278 * snd_soc_info_enum_double - enumerated double mixer info callback
2279 * @kcontrol: mixer control
2280 * @uinfo: control element information
2281 *
2282 * Callback to provide information about a double enumerated
2283 * mixer control.
2284 *
2285 * Returns 0 for success.
2286 */
2287int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2288 struct snd_ctl_elem_info *uinfo)
2289{
2290 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2291
2292 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2293 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2294 uinfo->value.enumerated.items = e->max;
2295
2296 if (uinfo->value.enumerated.item > e->max - 1)
2297 uinfo->value.enumerated.item = e->max - 1;
2298 strcpy(uinfo->value.enumerated.name,
2299 e->texts[uinfo->value.enumerated.item]);
2300 return 0;
2301}
2302EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2303
2304/**
2305 * snd_soc_get_enum_double - enumerated double mixer get callback
2306 * @kcontrol: mixer control
2307 * @ucontrol: control element information
2308 *
2309 * Callback to get the value of a double enumerated mixer.
2310 *
2311 * Returns 0 for success.
2312 */
2313int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2314 struct snd_ctl_elem_value *ucontrol)
2315{
2316 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2317 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2318 unsigned int val, bitmask;
2319
2320 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2321 ;
2322 val = snd_soc_read(codec, e->reg);
2323 ucontrol->value.enumerated.item[0]
2324 = (val >> e->shift_l) & (bitmask - 1);
2325 if (e->shift_l != e->shift_r)
2326 ucontrol->value.enumerated.item[1] =
2327 (val >> e->shift_r) & (bitmask - 1);
2328
2329 return 0;
2330}
2331EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2332
2333/**
2334 * snd_soc_put_enum_double - enumerated double mixer put callback
2335 * @kcontrol: mixer control
2336 * @ucontrol: control element information
2337 *
2338 * Callback to set the value of a double enumerated mixer.
2339 *
2340 * Returns 0 for success.
2341 */
2342int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2343 struct snd_ctl_elem_value *ucontrol)
2344{
2345 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2346 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2347 unsigned int val;
2348 unsigned int mask, bitmask;
2349
2350 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2351 ;
2352 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2353 return -EINVAL;
2354 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2355 mask = (bitmask - 1) << e->shift_l;
2356 if (e->shift_l != e->shift_r) {
2357 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2358 return -EINVAL;
2359 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2360 mask |= (bitmask - 1) << e->shift_r;
2361 }
2362
2363 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2364}
2365EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2366
2367/**
2368 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2369 * @kcontrol: mixer control
2370 * @ucontrol: control element information
2371 *
2372 * Callback to get the value of a double semi enumerated mixer.
2373 *
2374 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2375 * used for handling bitfield coded enumeration for example.
2376 *
2377 * Returns 0 for success.
2378 */
2379int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2380 struct snd_ctl_elem_value *ucontrol)
2381{
2382 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2383 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2384 unsigned int reg_val, val, mux;
2385
2386 reg_val = snd_soc_read(codec, e->reg);
2387 val = (reg_val >> e->shift_l) & e->mask;
2388 for (mux = 0; mux < e->max; mux++) {
2389 if (val == e->values[mux])
2390 break;
2391 }
2392 ucontrol->value.enumerated.item[0] = mux;
2393 if (e->shift_l != e->shift_r) {
2394 val = (reg_val >> e->shift_r) & e->mask;
2395 for (mux = 0; mux < e->max; mux++) {
2396 if (val == e->values[mux])
2397 break;
2398 }
2399 ucontrol->value.enumerated.item[1] = mux;
2400 }
2401
2402 return 0;
2403}
2404EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2405
2406/**
2407 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2408 * @kcontrol: mixer control
2409 * @ucontrol: control element information
2410 *
2411 * Callback to set the value of a double semi enumerated mixer.
2412 *
2413 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2414 * used for handling bitfield coded enumeration for example.
2415 *
2416 * Returns 0 for success.
2417 */
2418int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2419 struct snd_ctl_elem_value *ucontrol)
2420{
2421 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2422 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2423 unsigned int val;
2424 unsigned int mask;
2425
2426 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2427 return -EINVAL;
2428 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2429 mask = e->mask << e->shift_l;
2430 if (e->shift_l != e->shift_r) {
2431 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2432 return -EINVAL;
2433 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2434 mask |= e->mask << e->shift_r;
2435 }
2436
2437 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2438}
2439EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2440
2441/**
2442 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2443 * @kcontrol: mixer control
2444 * @uinfo: control element information
2445 *
2446 * Callback to provide information about an external enumerated
2447 * single mixer.
2448 *
2449 * Returns 0 for success.
2450 */
2451int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2452 struct snd_ctl_elem_info *uinfo)
2453{
2454 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2455
2456 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2457 uinfo->count = 1;
2458 uinfo->value.enumerated.items = e->max;
2459
2460 if (uinfo->value.enumerated.item > e->max - 1)
2461 uinfo->value.enumerated.item = e->max - 1;
2462 strcpy(uinfo->value.enumerated.name,
2463 e->texts[uinfo->value.enumerated.item]);
2464 return 0;
2465}
2466EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2467
2468/**
2469 * snd_soc_info_volsw_ext - external single mixer info callback
2470 * @kcontrol: mixer control
2471 * @uinfo: control element information
2472 *
2473 * Callback to provide information about a single external mixer control.
2474 *
2475 * Returns 0 for success.
2476 */
2477int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2478 struct snd_ctl_elem_info *uinfo)
2479{
2480 int max = kcontrol->private_value;
2481
2482 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2483 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2484 else
2485 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2486
2487 uinfo->count = 1;
2488 uinfo->value.integer.min = 0;
2489 uinfo->value.integer.max = max;
2490 return 0;
2491}
2492EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2493
2494/**
2495 * snd_soc_info_volsw - single mixer info callback
2496 * @kcontrol: mixer control
2497 * @uinfo: control element information
2498 *
2499 * Callback to provide information about a single mixer control, or a double
2500 * mixer control that spans 2 registers.
2501 *
2502 * Returns 0 for success.
2503 */
2504int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2505 struct snd_ctl_elem_info *uinfo)
2506{
2507 struct soc_mixer_control *mc =
2508 (struct soc_mixer_control *)kcontrol->private_value;
2509 int platform_max;
2510
2511 if (!mc->platform_max)
2512 mc->platform_max = mc->max;
2513 platform_max = mc->platform_max;
2514
2515 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2516 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2517 else
2518 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2519
2520 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2521 uinfo->value.integer.min = 0;
2522 uinfo->value.integer.max = platform_max;
2523 return 0;
2524}
2525EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2526
2527/**
2528 * snd_soc_get_volsw - single mixer get callback
2529 * @kcontrol: mixer control
2530 * @ucontrol: control element information
2531 *
2532 * Callback to get the value of a single mixer control, or a double mixer
2533 * control that spans 2 registers.
2534 *
2535 * Returns 0 for success.
2536 */
2537int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2538 struct snd_ctl_elem_value *ucontrol)
2539{
2540 struct soc_mixer_control *mc =
2541 (struct soc_mixer_control *)kcontrol->private_value;
2542 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2543 unsigned int reg = mc->reg;
2544 unsigned int reg2 = mc->rreg;
2545 unsigned int shift = mc->shift;
2546 unsigned int rshift = mc->rshift;
2547 int max = mc->max;
2548 unsigned int mask = (1 << fls(max)) - 1;
2549 unsigned int invert = mc->invert;
2550
2551 ucontrol->value.integer.value[0] =
2552 (snd_soc_read(codec, reg) >> shift) & mask;
2553 if (invert)
2554 ucontrol->value.integer.value[0] =
2555 max - ucontrol->value.integer.value[0];
2556
2557 if (snd_soc_volsw_is_stereo(mc)) {
2558 if (reg == reg2)
2559 ucontrol->value.integer.value[1] =
2560 (snd_soc_read(codec, reg) >> rshift) & mask;
2561 else
2562 ucontrol->value.integer.value[1] =
2563 (snd_soc_read(codec, reg2) >> shift) & mask;
2564 if (invert)
2565 ucontrol->value.integer.value[1] =
2566 max - ucontrol->value.integer.value[1];
2567 }
2568
2569 return 0;
2570}
2571EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2572
2573/**
2574 * snd_soc_put_volsw - single mixer put callback
2575 * @kcontrol: mixer control
2576 * @ucontrol: control element information
2577 *
2578 * Callback to set the value of a single mixer control, or a double mixer
2579 * control that spans 2 registers.
2580 *
2581 * Returns 0 for success.
2582 */
2583int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2584 struct snd_ctl_elem_value *ucontrol)
2585{
2586 struct soc_mixer_control *mc =
2587 (struct soc_mixer_control *)kcontrol->private_value;
2588 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2589 unsigned int reg = mc->reg;
2590 unsigned int reg2 = mc->rreg;
2591 unsigned int shift = mc->shift;
2592 unsigned int rshift = mc->rshift;
2593 int max = mc->max;
2594 unsigned int mask = (1 << fls(max)) - 1;
2595 unsigned int invert = mc->invert;
2596 int err;
2597 bool type_2r = 0;
2598 unsigned int val2 = 0;
2599 unsigned int val, val_mask;
2600
2601 val = (ucontrol->value.integer.value[0] & mask);
2602 if (invert)
2603 val = max - val;
2604 val_mask = mask << shift;
2605 val = val << shift;
2606 if (snd_soc_volsw_is_stereo(mc)) {
2607 val2 = (ucontrol->value.integer.value[1] & mask);
2608 if (invert)
2609 val2 = max - val2;
2610 if (reg == reg2) {
2611 val_mask |= mask << rshift;
2612 val |= val2 << rshift;
2613 } else {
2614 val2 = val2 << shift;
2615 type_2r = 1;
2616 }
2617 }
2618 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2619 if (err < 0)
2620 return err;
2621
2622 if (type_2r)
2623 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2624
2625 return err;
2626}
2627EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2628
2629/**
2630 * snd_soc_get_volsw_sx - single mixer get callback
2631 * @kcontrol: mixer control
2632 * @ucontrol: control element information
2633 *
2634 * Callback to get the value of a single mixer control, or a double mixer
2635 * control that spans 2 registers.
2636 *
2637 * Returns 0 for success.
2638 */
2639int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2640 struct snd_ctl_elem_value *ucontrol)
2641{
2642 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2643 struct soc_mixer_control *mc =
2644 (struct soc_mixer_control *)kcontrol->private_value;
2645
2646 unsigned int reg = mc->reg;
2647 unsigned int reg2 = mc->rreg;
2648 unsigned int shift = mc->shift;
2649 unsigned int rshift = mc->rshift;
2650 int max = mc->max;
2651 int min = mc->min;
2652 int mask = (1 << (fls(min + max) - 1)) - 1;
2653
2654 ucontrol->value.integer.value[0] =
2655 ((snd_soc_read(codec, reg) >> shift) - min) & mask;
2656
2657 if (snd_soc_volsw_is_stereo(mc))
2658 ucontrol->value.integer.value[1] =
2659 ((snd_soc_read(codec, reg2) >> rshift) - min) & mask;
2660
2661 return 0;
2662}
2663EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2664
2665/**
2666 * snd_soc_put_volsw_sx - double mixer set callback
2667 * @kcontrol: mixer control
2668 * @uinfo: control element information
2669 *
2670 * Callback to set the value of a double mixer control that spans 2 registers.
2671 *
2672 * Returns 0 for success.
2673 */
2674int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2675 struct snd_ctl_elem_value *ucontrol)
2676{
2677 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2678 struct soc_mixer_control *mc =
2679 (struct soc_mixer_control *)kcontrol->private_value;
2680
2681 unsigned int reg = mc->reg;
2682 unsigned int reg2 = mc->rreg;
2683 unsigned int shift = mc->shift;
2684 unsigned int rshift = mc->rshift;
2685 int max = mc->max;
2686 int min = mc->min;
2687 int mask = (1 << (fls(min + max) - 1)) - 1;
2688 int err = 0;
2689 unsigned short val, val_mask, val2 = 0;
2690
2691 val_mask = mask << shift;
2692 val = (ucontrol->value.integer.value[0] + min) & mask;
2693 val = val << shift;
2694
2695 if (snd_soc_update_bits_locked(codec, reg, val_mask, val))
2696 return err;
2697
2698 if (snd_soc_volsw_is_stereo(mc)) {
2699 val_mask = mask << rshift;
2700 val2 = (ucontrol->value.integer.value[1] + min) & mask;
2701 val2 = val2 << rshift;
2702
2703 if (snd_soc_update_bits_locked(codec, reg2, val_mask, val2))
2704 return err;
2705 }
2706 return 0;
2707}
2708EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2709
2710/**
2711 * snd_soc_info_volsw_s8 - signed mixer info callback
2712 * @kcontrol: mixer control
2713 * @uinfo: control element information
2714 *
2715 * Callback to provide information about a signed mixer control.
2716 *
2717 * Returns 0 for success.
2718 */
2719int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2720 struct snd_ctl_elem_info *uinfo)
2721{
2722 struct soc_mixer_control *mc =
2723 (struct soc_mixer_control *)kcontrol->private_value;
2724 int platform_max;
2725 int min = mc->min;
2726
2727 if (!mc->platform_max)
2728 mc->platform_max = mc->max;
2729 platform_max = mc->platform_max;
2730
2731 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2732 uinfo->count = 2;
2733 uinfo->value.integer.min = 0;
2734 uinfo->value.integer.max = platform_max - min;
2735 return 0;
2736}
2737EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2738
2739/**
2740 * snd_soc_get_volsw_s8 - signed mixer get callback
2741 * @kcontrol: mixer control
2742 * @ucontrol: control element information
2743 *
2744 * Callback to get the value of a signed mixer control.
2745 *
2746 * Returns 0 for success.
2747 */
2748int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2749 struct snd_ctl_elem_value *ucontrol)
2750{
2751 struct soc_mixer_control *mc =
2752 (struct soc_mixer_control *)kcontrol->private_value;
2753 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2754 unsigned int reg = mc->reg;
2755 int min = mc->min;
2756 int val = snd_soc_read(codec, reg);
2757
2758 ucontrol->value.integer.value[0] =
2759 ((signed char)(val & 0xff))-min;
2760 ucontrol->value.integer.value[1] =
2761 ((signed char)((val >> 8) & 0xff))-min;
2762 return 0;
2763}
2764EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2765
2766/**
2767 * snd_soc_put_volsw_sgn - signed mixer put callback
2768 * @kcontrol: mixer control
2769 * @ucontrol: control element information
2770 *
2771 * Callback to set the value of a signed mixer control.
2772 *
2773 * Returns 0 for success.
2774 */
2775int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2776 struct snd_ctl_elem_value *ucontrol)
2777{
2778 struct soc_mixer_control *mc =
2779 (struct soc_mixer_control *)kcontrol->private_value;
2780 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2781 unsigned int reg = mc->reg;
2782 int min = mc->min;
2783 unsigned int val;
2784
2785 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2786 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2787
2788 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2789}
2790EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2791
2792/**
2793 * snd_soc_limit_volume - Set new limit to an existing volume control.
2794 *
2795 * @codec: where to look for the control
2796 * @name: Name of the control
2797 * @max: new maximum limit
2798 *
2799 * Return 0 for success, else error.
2800 */
2801int snd_soc_limit_volume(struct snd_soc_codec *codec,
2802 const char *name, int max)
2803{
2804 struct snd_card *card = codec->card->snd_card;
2805 struct snd_kcontrol *kctl;
2806 struct soc_mixer_control *mc;
2807 int found = 0;
2808 int ret = -EINVAL;
2809
2810 /* Sanity check for name and max */
2811 if (unlikely(!name || max <= 0))
2812 return -EINVAL;
2813
2814 list_for_each_entry(kctl, &card->controls, list) {
2815 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2816 found = 1;
2817 break;
2818 }
2819 }
2820 if (found) {
2821 mc = (struct soc_mixer_control *)kctl->private_value;
2822 if (max <= mc->max) {
2823 mc->platform_max = max;
2824 ret = 0;
2825 }
2826 }
2827 return ret;
2828}
2829EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2830
2831int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
2832 struct snd_ctl_elem_info *uinfo)
2833{
2834 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2835 struct soc_bytes *params = (void *)kcontrol->private_value;
2836
2837 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
2838 uinfo->count = params->num_regs * codec->val_bytes;
2839
2840 return 0;
2841}
2842EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
2843
2844int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
2845 struct snd_ctl_elem_value *ucontrol)
2846{
2847 struct soc_bytes *params = (void *)kcontrol->private_value;
2848 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2849 int ret;
2850
2851 if (codec->using_regmap)
2852 ret = regmap_raw_read(codec->control_data, params->base,
2853 ucontrol->value.bytes.data,
2854 params->num_regs * codec->val_bytes);
2855 else
2856 ret = -EINVAL;
2857
2858 /* Hide any masked bytes to ensure consistent data reporting */
2859 if (ret == 0 && params->mask) {
2860 switch (codec->val_bytes) {
2861 case 1:
2862 ucontrol->value.bytes.data[0] &= ~params->mask;
2863 break;
2864 case 2:
2865 ((u16 *)(&ucontrol->value.bytes.data))[0]
2866 &= ~params->mask;
2867 break;
2868 case 4:
2869 ((u32 *)(&ucontrol->value.bytes.data))[0]
2870 &= ~params->mask;
2871 break;
2872 default:
2873 return -EINVAL;
2874 }
2875 }
2876
2877 return ret;
2878}
2879EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
2880
2881int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
2882 struct snd_ctl_elem_value *ucontrol)
2883{
2884 struct soc_bytes *params = (void *)kcontrol->private_value;
2885 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2886 int ret, len;
2887 unsigned int val;
2888 void *data;
2889
2890 if (!codec->using_regmap)
2891 return -EINVAL;
2892
2893 data = ucontrol->value.bytes.data;
2894 len = params->num_regs * codec->val_bytes;
2895
2896 /*
2897 * If we've got a mask then we need to preserve the register
2898 * bits. We shouldn't modify the incoming data so take a
2899 * copy.
2900 */
2901 if (params->mask) {
2902 ret = regmap_read(codec->control_data, params->base, &val);
2903 if (ret != 0)
2904 return ret;
2905
2906 val &= params->mask;
2907
2908 data = kmemdup(data, len, GFP_KERNEL);
2909 if (!data)
2910 return -ENOMEM;
2911
2912 switch (codec->val_bytes) {
2913 case 1:
2914 ((u8 *)data)[0] &= ~params->mask;
2915 ((u8 *)data)[0] |= val;
2916 break;
2917 case 2:
2918 ((u16 *)data)[0] &= cpu_to_be16(~params->mask);
2919 ((u16 *)data)[0] |= cpu_to_be16(val);
2920 break;
2921 case 4:
2922 ((u32 *)data)[0] &= cpu_to_be32(~params->mask);
2923 ((u32 *)data)[0] |= cpu_to_be32(val);
2924 break;
2925 default:
2926 return -EINVAL;
2927 }
2928 }
2929
2930 ret = regmap_raw_write(codec->control_data, params->base,
2931 data, len);
2932
2933 if (params->mask)
2934 kfree(data);
2935
2936 return ret;
2937}
2938EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
2939
2940/**
2941 * snd_soc_info_xr_sx - signed multi register info callback
2942 * @kcontrol: mreg control
2943 * @uinfo: control element information
2944 *
2945 * Callback to provide information of a control that can
2946 * span multiple codec registers which together
2947 * forms a single signed value in a MSB/LSB manner.
2948 *
2949 * Returns 0 for success.
2950 */
2951int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
2952 struct snd_ctl_elem_info *uinfo)
2953{
2954 struct soc_mreg_control *mc =
2955 (struct soc_mreg_control *)kcontrol->private_value;
2956 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2957 uinfo->count = 1;
2958 uinfo->value.integer.min = mc->min;
2959 uinfo->value.integer.max = mc->max;
2960
2961 return 0;
2962}
2963EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
2964
2965/**
2966 * snd_soc_get_xr_sx - signed multi register get callback
2967 * @kcontrol: mreg control
2968 * @ucontrol: control element information
2969 *
2970 * Callback to get the value of a control that can span
2971 * multiple codec registers which together forms a single
2972 * signed value in a MSB/LSB manner. The control supports
2973 * specifying total no of bits used to allow for bitfields
2974 * across the multiple codec registers.
2975 *
2976 * Returns 0 for success.
2977 */
2978int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
2979 struct snd_ctl_elem_value *ucontrol)
2980{
2981 struct soc_mreg_control *mc =
2982 (struct soc_mreg_control *)kcontrol->private_value;
2983 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2984 unsigned int regbase = mc->regbase;
2985 unsigned int regcount = mc->regcount;
2986 unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
2987 unsigned int regwmask = (1<<regwshift)-1;
2988 unsigned int invert = mc->invert;
2989 unsigned long mask = (1UL<<mc->nbits)-1;
2990 long min = mc->min;
2991 long max = mc->max;
2992 long val = 0;
2993 unsigned long regval;
2994 unsigned int i;
2995
2996 for (i = 0; i < regcount; i++) {
2997 regval = snd_soc_read(codec, regbase+i) & regwmask;
2998 val |= regval << (regwshift*(regcount-i-1));
2999 }
3000 val &= mask;
3001 if (min < 0 && val > max)
3002 val |= ~mask;
3003 if (invert)
3004 val = max - val;
3005 ucontrol->value.integer.value[0] = val;
3006
3007 return 0;
3008}
3009EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3010
3011/**
3012 * snd_soc_put_xr_sx - signed multi register get callback
3013 * @kcontrol: mreg control
3014 * @ucontrol: control element information
3015 *
3016 * Callback to set the value of a control that can span
3017 * multiple codec registers which together forms a single
3018 * signed value in a MSB/LSB manner. The control supports
3019 * specifying total no of bits used to allow for bitfields
3020 * across the multiple codec registers.
3021 *
3022 * Returns 0 for success.
3023 */
3024int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3025 struct snd_ctl_elem_value *ucontrol)
3026{
3027 struct soc_mreg_control *mc =
3028 (struct soc_mreg_control *)kcontrol->private_value;
3029 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3030 unsigned int regbase = mc->regbase;
3031 unsigned int regcount = mc->regcount;
3032 unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3033 unsigned int regwmask = (1<<regwshift)-1;
3034 unsigned int invert = mc->invert;
3035 unsigned long mask = (1UL<<mc->nbits)-1;
3036 long max = mc->max;
3037 long val = ucontrol->value.integer.value[0];
3038 unsigned int i, regval, regmask;
3039 int err;
3040
3041 if (invert)
3042 val = max - val;
3043 val &= mask;
3044 for (i = 0; i < regcount; i++) {
3045 regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3046 regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3047 err = snd_soc_update_bits_locked(codec, regbase+i,
3048 regmask, regval);
3049 if (err < 0)
3050 return err;
3051 }
3052
3053 return 0;
3054}
3055EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3056
3057/**
3058 * snd_soc_get_strobe - strobe get callback
3059 * @kcontrol: mixer control
3060 * @ucontrol: control element information
3061 *
3062 * Callback get the value of a strobe mixer control.
3063 *
3064 * Returns 0 for success.
3065 */
3066int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3067 struct snd_ctl_elem_value *ucontrol)
3068{
3069 struct soc_mixer_control *mc =
3070 (struct soc_mixer_control *)kcontrol->private_value;
3071 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3072 unsigned int reg = mc->reg;
3073 unsigned int shift = mc->shift;
3074 unsigned int mask = 1 << shift;
3075 unsigned int invert = mc->invert != 0;
3076 unsigned int val = snd_soc_read(codec, reg) & mask;
3077
3078 if (shift != 0 && val != 0)
3079 val = val >> shift;
3080 ucontrol->value.enumerated.item[0] = val ^ invert;
3081
3082 return 0;
3083}
3084EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3085
3086/**
3087 * snd_soc_put_strobe - strobe put callback
3088 * @kcontrol: mixer control
3089 * @ucontrol: control element information
3090 *
3091 * Callback strobe a register bit to high then low (or the inverse)
3092 * in one pass of a single mixer enum control.
3093 *
3094 * Returns 1 for success.
3095 */
3096int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3097 struct snd_ctl_elem_value *ucontrol)
3098{
3099 struct soc_mixer_control *mc =
3100 (struct soc_mixer_control *)kcontrol->private_value;
3101 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3102 unsigned int reg = mc->reg;
3103 unsigned int shift = mc->shift;
3104 unsigned int mask = 1 << shift;
3105 unsigned int invert = mc->invert != 0;
3106 unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3107 unsigned int val1 = (strobe ^ invert) ? mask : 0;
3108 unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3109 int err;
3110
3111 err = snd_soc_update_bits_locked(codec, reg, mask, val1);
3112 if (err < 0)
3113 return err;
3114
3115 err = snd_soc_update_bits_locked(codec, reg, mask, val2);
3116 return err;
3117}
3118EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3119
3120/**
3121 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3122 * @dai: DAI
3123 * @clk_id: DAI specific clock ID
3124 * @freq: new clock frequency in Hz
3125 * @dir: new clock direction - input/output.
3126 *
3127 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3128 */
3129int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3130 unsigned int freq, int dir)
3131{
3132 if (dai->driver && dai->driver->ops->set_sysclk)
3133 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3134 else if (dai->codec && dai->codec->driver->set_sysclk)
3135 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3136 freq, dir);
3137 else
3138 return -EINVAL;
3139}
3140EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3141
3142/**
3143 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3144 * @codec: CODEC
3145 * @clk_id: DAI specific clock ID
3146 * @source: Source for the clock
3147 * @freq: new clock frequency in Hz
3148 * @dir: new clock direction - input/output.
3149 *
3150 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3151 */
3152int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3153 int source, unsigned int freq, int dir)
3154{
3155 if (codec->driver->set_sysclk)
3156 return codec->driver->set_sysclk(codec, clk_id, source,
3157 freq, dir);
3158 else
3159 return -EINVAL;
3160}
3161EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3162
3163/**
3164 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3165 * @dai: DAI
3166 * @div_id: DAI specific clock divider ID
3167 * @div: new clock divisor.
3168 *
3169 * Configures the clock dividers. This is used to derive the best DAI bit and
3170 * frame clocks from the system or master clock. It's best to set the DAI bit
3171 * and frame clocks as low as possible to save system power.
3172 */
3173int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3174 int div_id, int div)
3175{
3176 if (dai->driver && dai->driver->ops->set_clkdiv)
3177 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3178 else
3179 return -EINVAL;
3180}
3181EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3182
3183/**
3184 * snd_soc_dai_set_pll - configure DAI PLL.
3185 * @dai: DAI
3186 * @pll_id: DAI specific PLL ID
3187 * @source: DAI specific source for the PLL
3188 * @freq_in: PLL input clock frequency in Hz
3189 * @freq_out: requested PLL output clock frequency in Hz
3190 *
3191 * Configures and enables PLL to generate output clock based on input clock.
3192 */
3193int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3194 unsigned int freq_in, unsigned int freq_out)
3195{
3196 if (dai->driver && dai->driver->ops->set_pll)
3197 return dai->driver->ops->set_pll(dai, pll_id, source,
3198 freq_in, freq_out);
3199 else if (dai->codec && dai->codec->driver->set_pll)
3200 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3201 freq_in, freq_out);
3202 else
3203 return -EINVAL;
3204}
3205EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3206
3207/*
3208 * snd_soc_codec_set_pll - configure codec PLL.
3209 * @codec: CODEC
3210 * @pll_id: DAI specific PLL ID
3211 * @source: DAI specific source for the PLL
3212 * @freq_in: PLL input clock frequency in Hz
3213 * @freq_out: requested PLL output clock frequency in Hz
3214 *
3215 * Configures and enables PLL to generate output clock based on input clock.
3216 */
3217int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3218 unsigned int freq_in, unsigned int freq_out)
3219{
3220 if (codec->driver->set_pll)
3221 return codec->driver->set_pll(codec, pll_id, source,
3222 freq_in, freq_out);
3223 else
3224 return -EINVAL;
3225}
3226EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3227
3228/**
3229 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3230 * @dai: DAI
3231 * @fmt: SND_SOC_DAIFMT_ format value.
3232 *
3233 * Configures the DAI hardware format and clocking.
3234 */
3235int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3236{
3237 if (dai->driver == NULL)
3238 return -EINVAL;
3239 if (dai->driver->ops->set_fmt == NULL)
3240 return -ENOTSUPP;
3241 return dai->driver->ops->set_fmt(dai, fmt);
3242}
3243EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3244
3245/**
3246 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3247 * @dai: DAI
3248 * @tx_mask: bitmask representing active TX slots.
3249 * @rx_mask: bitmask representing active RX slots.
3250 * @slots: Number of slots in use.
3251 * @slot_width: Width in bits for each slot.
3252 *
3253 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3254 * specific.
3255 */
3256int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3257 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3258{
3259 if (dai->driver && dai->driver->ops->set_tdm_slot)
3260 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3261 slots, slot_width);
3262 else
3263 return -EINVAL;
3264}
3265EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3266
3267/**
3268 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3269 * @dai: DAI
3270 * @tx_num: how many TX channels
3271 * @tx_slot: pointer to an array which imply the TX slot number channel
3272 * 0~num-1 uses
3273 * @rx_num: how many RX channels
3274 * @rx_slot: pointer to an array which imply the RX slot number channel
3275 * 0~num-1 uses
3276 *
3277 * configure the relationship between channel number and TDM slot number.
3278 */
3279int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3280 unsigned int tx_num, unsigned int *tx_slot,
3281 unsigned int rx_num, unsigned int *rx_slot)
3282{
3283 if (dai->driver && dai->driver->ops->set_channel_map)
3284 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3285 rx_num, rx_slot);
3286 else
3287 return -EINVAL;
3288}
3289EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3290
3291/**
3292 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3293 * @dai: DAI
3294 * @tristate: tristate enable
3295 *
3296 * Tristates the DAI so that others can use it.
3297 */
3298int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3299{
3300 if (dai->driver && dai->driver->ops->set_tristate)
3301 return dai->driver->ops->set_tristate(dai, tristate);
3302 else
3303 return -EINVAL;
3304}
3305EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3306
3307/**
3308 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3309 * @dai: DAI
3310 * @mute: mute enable
3311 *
3312 * Mutes the DAI DAC.
3313 */
3314int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3315{
3316 if (dai->driver && dai->driver->ops->digital_mute)
3317 return dai->driver->ops->digital_mute(dai, mute);
3318 else
3319 return -ENOTSUPP;
3320}
3321EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3322
3323/**
3324 * snd_soc_register_card - Register a card with the ASoC core
3325 *
3326 * @card: Card to register
3327 *
3328 */
3329int snd_soc_register_card(struct snd_soc_card *card)
3330{
3331 int i, ret;
3332
3333 if (!card->name || !card->dev)
3334 return -EINVAL;
3335
3336 for (i = 0; i < card->num_links; i++) {
3337 struct snd_soc_dai_link *link = &card->dai_link[i];
3338
3339 /*
3340 * Codec must be specified by 1 of name or OF node,
3341 * not both or neither.
3342 */
3343 if (!!link->codec_name == !!link->codec_of_node) {
3344 dev_err(card->dev,
3345 "Neither/both codec name/of_node are set for %s\n",
3346 link->name);
3347 return -EINVAL;
3348 }
3349
3350 /*
3351 * Platform may be specified by either name or OF node, but
3352 * can be left unspecified, and a dummy platform will be used.
3353 */
3354 if (link->platform_name && link->platform_of_node) {
3355 dev_err(card->dev,
3356 "Both platform name/of_node are set for %s\n", link->name);
3357 return -EINVAL;
3358 }
3359
3360 /*
3361 * CPU DAI must be specified by 1 of name or OF node,
3362 * not both or neither.
3363 */
3364 if (!!link->cpu_dai_name == !!link->cpu_dai_of_node) {
3365 dev_err(card->dev,
3366 "Neither/both cpu_dai name/of_node are set for %s\n",
3367 link->name);
3368 return -EINVAL;
3369 }
3370 }
3371
3372 dev_set_drvdata(card->dev, card);
3373
3374 snd_soc_initialize_card_lists(card);
3375
3376 soc_init_card_debugfs(card);
3377
3378 card->rtd = devm_kzalloc(card->dev,
3379 sizeof(struct snd_soc_pcm_runtime) *
3380 (card->num_links + card->num_aux_devs),
3381 GFP_KERNEL);
3382 if (card->rtd == NULL)
3383 return -ENOMEM;
3384 card->num_rtd = 0;
3385 card->rtd_aux = &card->rtd[card->num_links];
3386
3387 for (i = 0; i < card->num_links; i++)
3388 card->rtd[i].dai_link = &card->dai_link[i];
3389
3390 INIT_LIST_HEAD(&card->list);
3391 INIT_LIST_HEAD(&card->dapm_dirty);
3392 card->instantiated = 0;
3393 mutex_init(&card->mutex);
3394 mutex_init(&card->dapm_mutex);
3395
3396 ret = snd_soc_instantiate_card(card);
3397 if (ret != 0)
3398 soc_cleanup_card_debugfs(card);
3399
3400 return ret;
3401}
3402EXPORT_SYMBOL_GPL(snd_soc_register_card);
3403
3404/**
3405 * snd_soc_unregister_card - Unregister a card with the ASoC core
3406 *
3407 * @card: Card to unregister
3408 *
3409 */
3410int snd_soc_unregister_card(struct snd_soc_card *card)
3411{
3412 if (card->instantiated)
3413 soc_cleanup_card_resources(card);
3414 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3415
3416 return 0;
3417}
3418EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3419
3420/*
3421 * Simplify DAI link configuration by removing ".-1" from device names
3422 * and sanitizing names.
3423 */
3424static char *fmt_single_name(struct device *dev, int *id)
3425{
3426 char *found, name[NAME_SIZE];
3427 int id1, id2;
3428
3429 if (dev_name(dev) == NULL)
3430 return NULL;
3431
3432 strlcpy(name, dev_name(dev), NAME_SIZE);
3433
3434 /* are we a "%s.%d" name (platform and SPI components) */
3435 found = strstr(name, dev->driver->name);
3436 if (found) {
3437 /* get ID */
3438 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3439
3440 /* discard ID from name if ID == -1 */
3441 if (*id == -1)
3442 found[strlen(dev->driver->name)] = '\0';
3443 }
3444
3445 } else {
3446 /* I2C component devices are named "bus-addr" */
3447 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3448 char tmp[NAME_SIZE];
3449
3450 /* create unique ID number from I2C addr and bus */
3451 *id = ((id1 & 0xffff) << 16) + id2;
3452
3453 /* sanitize component name for DAI link creation */
3454 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3455 strlcpy(name, tmp, NAME_SIZE);
3456 } else
3457 *id = 0;
3458 }
3459
3460 return kstrdup(name, GFP_KERNEL);
3461}
3462
3463/*
3464 * Simplify DAI link naming for single devices with multiple DAIs by removing
3465 * any ".-1" and using the DAI name (instead of device name).
3466 */
3467static inline char *fmt_multiple_name(struct device *dev,
3468 struct snd_soc_dai_driver *dai_drv)
3469{
3470 if (dai_drv->name == NULL) {
3471 pr_err("asoc: error - multiple DAI %s registered with no name\n",
3472 dev_name(dev));
3473 return NULL;
3474 }
3475
3476 return kstrdup(dai_drv->name, GFP_KERNEL);
3477}
3478
3479/**
3480 * snd_soc_register_dai - Register a DAI with the ASoC core
3481 *
3482 * @dai: DAI to register
3483 */
3484int snd_soc_register_dai(struct device *dev,
3485 struct snd_soc_dai_driver *dai_drv)
3486{
3487 struct snd_soc_codec *codec;
3488 struct snd_soc_dai *dai;
3489
3490 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3491
3492 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3493 if (dai == NULL)
3494 return -ENOMEM;
3495
3496 /* create DAI component name */
3497 dai->name = fmt_single_name(dev, &dai->id);
3498 if (dai->name == NULL) {
3499 kfree(dai);
3500 return -ENOMEM;
3501 }
3502
3503 dai->dev = dev;
3504 dai->driver = dai_drv;
3505 dai->dapm.dev = dev;
3506 if (!dai->driver->ops)
3507 dai->driver->ops = &null_dai_ops;
3508
3509 mutex_lock(&client_mutex);
3510
3511 list_for_each_entry(codec, &codec_list, list) {
3512 if (codec->dev == dev) {
3513 dev_dbg(dev, "Mapped DAI %s to CODEC %s\n",
3514 dai->name, codec->name);
3515 dai->codec = codec;
3516 break;
3517 }
3518 }
3519
3520 list_add(&dai->list, &dai_list);
3521
3522 mutex_unlock(&client_mutex);
3523
3524 pr_debug("Registered DAI '%s'\n", dai->name);
3525
3526 return 0;
3527}
3528EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3529
3530/**
3531 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3532 *
3533 * @dai: DAI to unregister
3534 */
3535void snd_soc_unregister_dai(struct device *dev)
3536{
3537 struct snd_soc_dai *dai;
3538
3539 list_for_each_entry(dai, &dai_list, list) {
3540 if (dev == dai->dev)
3541 goto found;
3542 }
3543 return;
3544
3545found:
3546 mutex_lock(&client_mutex);
3547 list_del(&dai->list);
3548 mutex_unlock(&client_mutex);
3549
3550 pr_debug("Unregistered DAI '%s'\n", dai->name);
3551 kfree(dai->name);
3552 kfree(dai);
3553}
3554EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3555
3556/**
3557 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3558 *
3559 * @dai: Array of DAIs to register
3560 * @count: Number of DAIs
3561 */
3562int snd_soc_register_dais(struct device *dev,
3563 struct snd_soc_dai_driver *dai_drv, size_t count)
3564{
3565 struct snd_soc_codec *codec;
3566 struct snd_soc_dai *dai;
3567 int i, ret = 0;
3568
3569 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3570
3571 for (i = 0; i < count; i++) {
3572
3573 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3574 if (dai == NULL) {
3575 ret = -ENOMEM;
3576 goto err;
3577 }
3578
3579 /* create DAI component name */
3580 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3581 if (dai->name == NULL) {
3582 kfree(dai);
3583 ret = -EINVAL;
3584 goto err;
3585 }
3586
3587 dai->dev = dev;
3588 dai->driver = &dai_drv[i];
3589 if (dai->driver->id)
3590 dai->id = dai->driver->id;
3591 else
3592 dai->id = i;
3593 dai->dapm.dev = dev;
3594 if (!dai->driver->ops)
3595 dai->driver->ops = &null_dai_ops;
3596
3597 mutex_lock(&client_mutex);
3598
3599 list_for_each_entry(codec, &codec_list, list) {
3600 if (codec->dev == dev) {
3601 dev_dbg(dev, "Mapped DAI %s to CODEC %s\n",
3602 dai->name, codec->name);
3603 dai->codec = codec;
3604 break;
3605 }
3606 }
3607
3608 list_add(&dai->list, &dai_list);
3609
3610 mutex_unlock(&client_mutex);
3611
3612 pr_debug("Registered DAI '%s'\n", dai->name);
3613 }
3614
3615 return 0;
3616
3617err:
3618 for (i--; i >= 0; i--)
3619 snd_soc_unregister_dai(dev);
3620
3621 return ret;
3622}
3623EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3624
3625/**
3626 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3627 *
3628 * @dai: Array of DAIs to unregister
3629 * @count: Number of DAIs
3630 */
3631void snd_soc_unregister_dais(struct device *dev, size_t count)
3632{
3633 int i;
3634
3635 for (i = 0; i < count; i++)
3636 snd_soc_unregister_dai(dev);
3637}
3638EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3639
3640/**
3641 * snd_soc_register_platform - Register a platform with the ASoC core
3642 *
3643 * @platform: platform to register
3644 */
3645int snd_soc_register_platform(struct device *dev,
3646 struct snd_soc_platform_driver *platform_drv)
3647{
3648 struct snd_soc_platform *platform;
3649
3650 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3651
3652 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3653 if (platform == NULL)
3654 return -ENOMEM;
3655
3656 /* create platform component name */
3657 platform->name = fmt_single_name(dev, &platform->id);
3658 if (platform->name == NULL) {
3659 kfree(platform);
3660 return -ENOMEM;
3661 }
3662
3663 platform->dev = dev;
3664 platform->driver = platform_drv;
3665 platform->dapm.dev = dev;
3666 platform->dapm.platform = platform;
3667 platform->dapm.stream_event = platform_drv->stream_event;
3668 mutex_init(&platform->mutex);
3669
3670 mutex_lock(&client_mutex);
3671 list_add(&platform->list, &platform_list);
3672 mutex_unlock(&client_mutex);
3673
3674 pr_debug("Registered platform '%s'\n", platform->name);
3675
3676 return 0;
3677}
3678EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3679
3680/**
3681 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3682 *
3683 * @platform: platform to unregister
3684 */
3685void snd_soc_unregister_platform(struct device *dev)
3686{
3687 struct snd_soc_platform *platform;
3688
3689 list_for_each_entry(platform, &platform_list, list) {
3690 if (dev == platform->dev)
3691 goto found;
3692 }
3693 return;
3694
3695found:
3696 mutex_lock(&client_mutex);
3697 list_del(&platform->list);
3698 mutex_unlock(&client_mutex);
3699
3700 pr_debug("Unregistered platform '%s'\n", platform->name);
3701 kfree(platform->name);
3702 kfree(platform);
3703}
3704EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3705
3706static u64 codec_format_map[] = {
3707 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3708 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3709 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3710 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3711 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3712 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3713 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3714 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3715 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3716 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3717 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3718 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3719 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3720 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3721 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3722 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3723};
3724
3725/* Fix up the DAI formats for endianness: codecs don't actually see
3726 * the endianness of the data but we're using the CPU format
3727 * definitions which do need to include endianness so we ensure that
3728 * codec DAIs always have both big and little endian variants set.
3729 */
3730static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3731{
3732 int i;
3733
3734 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3735 if (stream->formats & codec_format_map[i])
3736 stream->formats |= codec_format_map[i];
3737}
3738
3739/**
3740 * snd_soc_register_codec - Register a codec with the ASoC core
3741 *
3742 * @codec: codec to register
3743 */
3744int snd_soc_register_codec(struct device *dev,
3745 const struct snd_soc_codec_driver *codec_drv,
3746 struct snd_soc_dai_driver *dai_drv,
3747 int num_dai)
3748{
3749 size_t reg_size;
3750 struct snd_soc_codec *codec;
3751 int ret, i;
3752
3753 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3754
3755 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3756 if (codec == NULL)
3757 return -ENOMEM;
3758
3759 /* create CODEC component name */
3760 codec->name = fmt_single_name(dev, &codec->id);
3761 if (codec->name == NULL) {
3762 kfree(codec);
3763 return -ENOMEM;
3764 }
3765
3766 if (codec_drv->compress_type)
3767 codec->compress_type = codec_drv->compress_type;
3768 else
3769 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3770
3771 codec->write = codec_drv->write;
3772 codec->read = codec_drv->read;
3773 codec->volatile_register = codec_drv->volatile_register;
3774 codec->readable_register = codec_drv->readable_register;
3775 codec->writable_register = codec_drv->writable_register;
3776 codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3777 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3778 codec->dapm.dev = dev;
3779 codec->dapm.codec = codec;
3780 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3781 codec->dapm.stream_event = codec_drv->stream_event;
3782 codec->dev = dev;
3783 codec->driver = codec_drv;
3784 codec->num_dai = num_dai;
3785 mutex_init(&codec->mutex);
3786
3787 /* allocate CODEC register cache */
3788 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3789 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3790 codec->reg_size = reg_size;
3791 /* it is necessary to make a copy of the default register cache
3792 * because in the case of using a compression type that requires
3793 * the default register cache to be marked as __devinitconst the
3794 * kernel might have freed the array by the time we initialize
3795 * the cache.
3796 */
3797 if (codec_drv->reg_cache_default) {
3798 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3799 reg_size, GFP_KERNEL);
3800 if (!codec->reg_def_copy) {
3801 ret = -ENOMEM;
3802 goto fail;
3803 }
3804 }
3805 }
3806
3807 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3808 if (!codec->volatile_register)
3809 codec->volatile_register = snd_soc_default_volatile_register;
3810 if (!codec->readable_register)
3811 codec->readable_register = snd_soc_default_readable_register;
3812 if (!codec->writable_register)
3813 codec->writable_register = snd_soc_default_writable_register;
3814 }
3815
3816 for (i = 0; i < num_dai; i++) {
3817 fixup_codec_formats(&dai_drv[i].playback);
3818 fixup_codec_formats(&dai_drv[i].capture);
3819 }
3820
3821 mutex_lock(&client_mutex);
3822 list_add(&codec->list, &codec_list);
3823 mutex_unlock(&client_mutex);
3824
3825 /* register any DAIs */
3826 if (num_dai) {
3827 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3828 if (ret < 0)
3829 dev_err(codec->dev, "Failed to regster DAIs: %d\n",
3830 ret);
3831 }
3832
3833 pr_debug("Registered codec '%s'\n", codec->name);
3834 return 0;
3835
3836fail:
3837 kfree(codec->reg_def_copy);
3838 codec->reg_def_copy = NULL;
3839 kfree(codec->name);
3840 kfree(codec);
3841 return ret;
3842}
3843EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3844
3845/**
3846 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3847 *
3848 * @codec: codec to unregister
3849 */
3850void snd_soc_unregister_codec(struct device *dev)
3851{
3852 struct snd_soc_codec *codec;
3853 int i;
3854
3855 list_for_each_entry(codec, &codec_list, list) {
3856 if (dev == codec->dev)
3857 goto found;
3858 }
3859 return;
3860
3861found:
3862 if (codec->num_dai)
3863 for (i = 0; i < codec->num_dai; i++)
3864 snd_soc_unregister_dai(dev);
3865
3866 mutex_lock(&client_mutex);
3867 list_del(&codec->list);
3868 mutex_unlock(&client_mutex);
3869
3870 pr_debug("Unregistered codec '%s'\n", codec->name);
3871
3872 snd_soc_cache_exit(codec);
3873 kfree(codec->reg_def_copy);
3874 kfree(codec->name);
3875 kfree(codec);
3876}
3877EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3878
3879/* Retrieve a card's name from device tree */
3880int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3881 const char *propname)
3882{
3883 struct device_node *np = card->dev->of_node;
3884 int ret;
3885
3886 ret = of_property_read_string_index(np, propname, 0, &card->name);
3887 /*
3888 * EINVAL means the property does not exist. This is fine providing
3889 * card->name was previously set, which is checked later in
3890 * snd_soc_register_card.
3891 */
3892 if (ret < 0 && ret != -EINVAL) {
3893 dev_err(card->dev,
3894 "Property '%s' could not be read: %d\n",
3895 propname, ret);
3896 return ret;
3897 }
3898
3899 return 0;
3900}
3901EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3902
3903int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3904 const char *propname)
3905{
3906 struct device_node *np = card->dev->of_node;
3907 int num_routes;
3908 struct snd_soc_dapm_route *routes;
3909 int i, ret;
3910
3911 num_routes = of_property_count_strings(np, propname);
3912 if (num_routes < 0 || num_routes & 1) {
3913 dev_err(card->dev,
3914 "Property '%s' does not exist or its length is not even\n",
3915 propname);
3916 return -EINVAL;
3917 }
3918 num_routes /= 2;
3919 if (!num_routes) {
3920 dev_err(card->dev,
3921 "Property '%s's length is zero\n",
3922 propname);
3923 return -EINVAL;
3924 }
3925
3926 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3927 GFP_KERNEL);
3928 if (!routes) {
3929 dev_err(card->dev,
3930 "Could not allocate DAPM route table\n");
3931 return -EINVAL;
3932 }
3933
3934 for (i = 0; i < num_routes; i++) {
3935 ret = of_property_read_string_index(np, propname,
3936 2 * i, &routes[i].sink);
3937 if (ret) {
3938 dev_err(card->dev,
3939 "Property '%s' index %d could not be read: %d\n",
3940 propname, 2 * i, ret);
3941 return -EINVAL;
3942 }
3943 ret = of_property_read_string_index(np, propname,
3944 (2 * i) + 1, &routes[i].source);
3945 if (ret) {
3946 dev_err(card->dev,
3947 "Property '%s' index %d could not be read: %d\n",
3948 propname, (2 * i) + 1, ret);
3949 return -EINVAL;
3950 }
3951 }
3952
3953 card->num_dapm_routes = num_routes;
3954 card->dapm_routes = routes;
3955
3956 return 0;
3957}
3958EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3959
3960static int __init snd_soc_init(void)
3961{
3962#ifdef CONFIG_DEBUG_FS
3963 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3964 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3965 pr_warn("ASoC: Failed to create debugfs directory\n");
3966 snd_soc_debugfs_root = NULL;
3967 }
3968
3969 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3970 &codec_list_fops))
3971 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3972
3973 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3974 &dai_list_fops))
3975 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3976
3977 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3978 &platform_list_fops))
3979 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3980#endif
3981
3982 snd_soc_util_init();
3983
3984 return platform_driver_register(&soc_driver);
3985}
3986module_init(snd_soc_init);
3987
3988static void __exit snd_soc_exit(void)
3989{
3990 snd_soc_util_exit();
3991
3992#ifdef CONFIG_DEBUG_FS
3993 debugfs_remove_recursive(snd_soc_debugfs_root);
3994#endif
3995 platform_driver_unregister(&soc_driver);
3996}
3997module_exit(snd_soc_exit);
3998
3999/* Module information */
4000MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4001MODULE_DESCRIPTION("ALSA SoC Core");
4002MODULE_LICENSE("GPL");
4003MODULE_ALIAS("platform:soc-audio");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-core.c -- ALSA SoC Audio Layer
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Author: Liam Girdwood <lrg@slimlogic.co.uk>
11// with code, comments and ideas from :-
12// Richard Purdie <richard@openedhand.com>
13//
14// TODO:
15// o Add hw rules to enforce rates, etc.
16// o More testing with other codecs/machines.
17// o Add more codecs and platforms to ensure good API coverage.
18// o Support TDM on PCM and I2S
19
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/pm.h>
25#include <linux/bitops.h>
26#include <linux/debugfs.h>
27#include <linux/platform_device.h>
28#include <linux/pinctrl/consumer.h>
29#include <linux/ctype.h>
30#include <linux/slab.h>
31#include <linux/of.h>
32#include <linux/of_graph.h>
33#include <linux/dmi.h>
34#include <sound/core.h>
35#include <sound/jack.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/soc-dpcm.h>
40#include <sound/soc-topology.h>
41#include <sound/soc-link.h>
42#include <sound/initval.h>
43
44#define CREATE_TRACE_POINTS
45#include <trace/events/asoc.h>
46
47#define NAME_SIZE 32
48
49static DEFINE_MUTEX(client_mutex);
50static LIST_HEAD(component_list);
51static LIST_HEAD(unbind_card_list);
52
53#define for_each_component(component) \
54 list_for_each_entry(component, &component_list, list)
55
56/*
57 * This is used if driver don't need to have CPU/Codec/Platform
58 * dai_link. see soc.h
59 */
60struct snd_soc_dai_link_component null_dailink_component[0];
61EXPORT_SYMBOL_GPL(null_dailink_component);
62
63/*
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
67 */
68static int pmdown_time = 5000;
69module_param(pmdown_time, int, 0);
70MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72static ssize_t pmdown_time_show(struct device *dev,
73 struct device_attribute *attr, char *buf)
74{
75 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
76
77 return sprintf(buf, "%ld\n", rtd->pmdown_time);
78}
79
80static ssize_t pmdown_time_set(struct device *dev,
81 struct device_attribute *attr,
82 const char *buf, size_t count)
83{
84 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
85 int ret;
86
87 ret = kstrtol(buf, 10, &rtd->pmdown_time);
88 if (ret)
89 return ret;
90
91 return count;
92}
93
94static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
95
96static struct attribute *soc_dev_attrs[] = {
97 &dev_attr_pmdown_time.attr,
98 NULL
99};
100
101static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
102 struct attribute *attr, int idx)
103{
104 struct device *dev = kobj_to_dev(kobj);
105 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
106
107 if (!rtd)
108 return 0;
109
110 if (attr == &dev_attr_pmdown_time.attr)
111 return attr->mode; /* always visible */
112 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
113}
114
115static const struct attribute_group soc_dapm_dev_group = {
116 .attrs = soc_dapm_dev_attrs,
117 .is_visible = soc_dev_attr_is_visible,
118};
119
120static const struct attribute_group soc_dev_group = {
121 .attrs = soc_dev_attrs,
122 .is_visible = soc_dev_attr_is_visible,
123};
124
125static const struct attribute_group *soc_dev_attr_groups[] = {
126 &soc_dapm_dev_group,
127 &soc_dev_group,
128 NULL
129};
130
131#ifdef CONFIG_DEBUG_FS
132struct dentry *snd_soc_debugfs_root;
133EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
134
135static void soc_init_component_debugfs(struct snd_soc_component *component)
136{
137 if (!component->card->debugfs_card_root)
138 return;
139
140 if (component->debugfs_prefix) {
141 char *name;
142
143 name = kasprintf(GFP_KERNEL, "%s:%s",
144 component->debugfs_prefix, component->name);
145 if (name) {
146 component->debugfs_root = debugfs_create_dir(name,
147 component->card->debugfs_card_root);
148 kfree(name);
149 }
150 } else {
151 component->debugfs_root = debugfs_create_dir(component->name,
152 component->card->debugfs_card_root);
153 }
154
155 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
156 component->debugfs_root);
157}
158
159static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
160{
161 if (!component->debugfs_root)
162 return;
163 debugfs_remove_recursive(component->debugfs_root);
164 component->debugfs_root = NULL;
165}
166
167static int dai_list_show(struct seq_file *m, void *v)
168{
169 struct snd_soc_component *component;
170 struct snd_soc_dai *dai;
171
172 mutex_lock(&client_mutex);
173
174 for_each_component(component)
175 for_each_component_dais(component, dai)
176 seq_printf(m, "%s\n", dai->name);
177
178 mutex_unlock(&client_mutex);
179
180 return 0;
181}
182DEFINE_SHOW_ATTRIBUTE(dai_list);
183
184static int component_list_show(struct seq_file *m, void *v)
185{
186 struct snd_soc_component *component;
187
188 mutex_lock(&client_mutex);
189
190 for_each_component(component)
191 seq_printf(m, "%s\n", component->name);
192
193 mutex_unlock(&client_mutex);
194
195 return 0;
196}
197DEFINE_SHOW_ATTRIBUTE(component_list);
198
199static void soc_init_card_debugfs(struct snd_soc_card *card)
200{
201 card->debugfs_card_root = debugfs_create_dir(card->name,
202 snd_soc_debugfs_root);
203
204 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
205 &card->pop_time);
206
207 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
208}
209
210static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
211{
212 debugfs_remove_recursive(card->debugfs_card_root);
213 card->debugfs_card_root = NULL;
214}
215
216static void snd_soc_debugfs_init(void)
217{
218 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
219
220 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
221 &dai_list_fops);
222
223 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
224 &component_list_fops);
225}
226
227static void snd_soc_debugfs_exit(void)
228{
229 debugfs_remove_recursive(snd_soc_debugfs_root);
230}
231
232#else
233
234static inline void soc_init_component_debugfs(
235 struct snd_soc_component *component)
236{
237}
238
239static inline void soc_cleanup_component_debugfs(
240 struct snd_soc_component *component)
241{
242}
243
244static inline void soc_init_card_debugfs(struct snd_soc_card *card)
245{
246}
247
248static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
249{
250}
251
252static inline void snd_soc_debugfs_init(void)
253{
254}
255
256static inline void snd_soc_debugfs_exit(void)
257{
258}
259
260#endif
261
262static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
263 struct snd_soc_component *component)
264{
265 struct snd_soc_component *comp;
266 int i;
267
268 for_each_rtd_components(rtd, i, comp) {
269 /* already connected */
270 if (comp == component)
271 return 0;
272 }
273
274 /* see for_each_rtd_components */
275 rtd->components[rtd->num_components] = component;
276 rtd->num_components++;
277
278 return 0;
279}
280
281struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
282 const char *driver_name)
283{
284 struct snd_soc_component *component;
285 int i;
286
287 if (!driver_name)
288 return NULL;
289
290 /*
291 * NOTE
292 *
293 * snd_soc_rtdcom_lookup() will find component from rtd by using
294 * specified driver name.
295 * But, if many components which have same driver name are connected
296 * to 1 rtd, this function will return 1st found component.
297 */
298 for_each_rtd_components(rtd, i, component) {
299 const char *component_name = component->driver->name;
300
301 if (!component_name)
302 continue;
303
304 if ((component_name == driver_name) ||
305 strcmp(component_name, driver_name) == 0)
306 return component;
307 }
308
309 return NULL;
310}
311EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
312
313struct snd_soc_component
314*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
315{
316 struct snd_soc_component *component;
317 struct snd_soc_component *found_component;
318
319 found_component = NULL;
320 for_each_component(component) {
321 if ((dev == component->dev) &&
322 (!driver_name ||
323 (driver_name == component->driver->name) ||
324 (strcmp(component->driver->name, driver_name) == 0))) {
325 found_component = component;
326 break;
327 }
328 }
329
330 return found_component;
331}
332EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
333
334struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
335 const char *driver_name)
336{
337 struct snd_soc_component *component;
338
339 mutex_lock(&client_mutex);
340 component = snd_soc_lookup_component_nolocked(dev, driver_name);
341 mutex_unlock(&client_mutex);
342
343 return component;
344}
345EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
346
347struct snd_soc_pcm_runtime
348*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
349 struct snd_soc_dai_link *dai_link)
350{
351 struct snd_soc_pcm_runtime *rtd;
352
353 for_each_card_rtds(card, rtd) {
354 if (rtd->dai_link == dai_link)
355 return rtd;
356 }
357 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
358 return NULL;
359}
360EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
361
362/*
363 * Power down the audio subsystem pmdown_time msecs after close is called.
364 * This is to ensure there are no pops or clicks in between any music tracks
365 * due to DAPM power cycling.
366 */
367void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
368{
369 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
370 int playback = SNDRV_PCM_STREAM_PLAYBACK;
371
372 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
373
374 dev_dbg(rtd->dev,
375 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
376 codec_dai->driver->playback.stream_name,
377 snd_soc_dai_stream_active(codec_dai, playback) ?
378 "active" : "inactive",
379 rtd->pop_wait ? "yes" : "no");
380
381 /* are we waiting on this codec DAI stream */
382 if (rtd->pop_wait == 1) {
383 rtd->pop_wait = 0;
384 snd_soc_dapm_stream_event(rtd, playback,
385 SND_SOC_DAPM_STREAM_STOP);
386 }
387
388 mutex_unlock(&rtd->card->pcm_mutex);
389}
390EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
391
392static void soc_release_rtd_dev(struct device *dev)
393{
394 /* "dev" means "rtd->dev" */
395 kfree(dev);
396}
397
398static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
399{
400 if (!rtd)
401 return;
402
403 list_del(&rtd->list);
404
405 if (delayed_work_pending(&rtd->delayed_work))
406 flush_delayed_work(&rtd->delayed_work);
407 snd_soc_pcm_component_free(rtd);
408
409 /*
410 * we don't need to call kfree() for rtd->dev
411 * see
412 * soc_release_rtd_dev()
413 *
414 * We don't need rtd->dev NULL check, because
415 * it is alloced *before* rtd.
416 * see
417 * soc_new_pcm_runtime()
418 */
419 device_unregister(rtd->dev);
420}
421
422static void close_delayed_work(struct work_struct *work) {
423 struct snd_soc_pcm_runtime *rtd =
424 container_of(work, struct snd_soc_pcm_runtime,
425 delayed_work.work);
426
427 if (rtd->close_delayed_work_func)
428 rtd->close_delayed_work_func(rtd);
429}
430
431static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
432 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
433{
434 struct snd_soc_pcm_runtime *rtd;
435 struct snd_soc_component *component;
436 struct device *dev;
437 int ret;
438 int stream;
439
440 /*
441 * for rtd->dev
442 */
443 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
444 if (!dev)
445 return NULL;
446
447 dev->parent = card->dev;
448 dev->release = soc_release_rtd_dev;
449
450 dev_set_name(dev, "%s", dai_link->name);
451
452 ret = device_register(dev);
453 if (ret < 0) {
454 put_device(dev); /* soc_release_rtd_dev */
455 return NULL;
456 }
457
458 /*
459 * for rtd
460 */
461 rtd = devm_kzalloc(dev,
462 sizeof(*rtd) +
463 sizeof(*component) * (dai_link->num_cpus +
464 dai_link->num_codecs +
465 dai_link->num_platforms),
466 GFP_KERNEL);
467 if (!rtd)
468 goto free_rtd;
469
470 rtd->dev = dev;
471 INIT_LIST_HEAD(&rtd->list);
472 for_each_pcm_streams(stream) {
473 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
474 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
475 }
476 dev_set_drvdata(dev, rtd);
477 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
478
479 /*
480 * for rtd->dais
481 */
482 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
483 sizeof(struct snd_soc_dai *),
484 GFP_KERNEL);
485 if (!rtd->dais)
486 goto free_rtd;
487
488 /*
489 * dais = [][][][][][][][][][][][][][][][][][]
490 * ^cpu_dais ^codec_dais
491 * |--- num_cpus ---|--- num_codecs --|
492 * see
493 * asoc_rtd_to_cpu()
494 * asoc_rtd_to_codec()
495 */
496 rtd->num_cpus = dai_link->num_cpus;
497 rtd->num_codecs = dai_link->num_codecs;
498 rtd->card = card;
499 rtd->dai_link = dai_link;
500 rtd->num = card->num_rtd++;
501
502 /* see for_each_card_rtds */
503 list_add_tail(&rtd->list, &card->rtd_list);
504
505 ret = device_add_groups(dev, soc_dev_attr_groups);
506 if (ret < 0)
507 goto free_rtd;
508
509 return rtd;
510
511free_rtd:
512 soc_free_pcm_runtime(rtd);
513 return NULL;
514}
515
516static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
517{
518 struct snd_soc_pcm_runtime *rtd;
519
520 for_each_card_rtds(card, rtd)
521 flush_delayed_work(&rtd->delayed_work);
522}
523
524#ifdef CONFIG_PM_SLEEP
525/* powers down audio subsystem for suspend */
526int snd_soc_suspend(struct device *dev)
527{
528 struct snd_soc_card *card = dev_get_drvdata(dev);
529 struct snd_soc_component *component;
530 struct snd_soc_pcm_runtime *rtd;
531 int playback = SNDRV_PCM_STREAM_PLAYBACK;
532 int i;
533
534 /* If the card is not initialized yet there is nothing to do */
535 if (!card->instantiated)
536 return 0;
537
538 /*
539 * Due to the resume being scheduled into a workqueue we could
540 * suspend before that's finished - wait for it to complete.
541 */
542 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
543
544 /* we're going to block userspace touching us until resume completes */
545 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
546
547 /* mute any active DACs */
548 for_each_card_rtds(card, rtd) {
549 struct snd_soc_dai *dai;
550
551 if (rtd->dai_link->ignore_suspend)
552 continue;
553
554 for_each_rtd_dais(rtd, i, dai) {
555 if (snd_soc_dai_stream_active(dai, playback))
556 snd_soc_dai_digital_mute(dai, 1, playback);
557 }
558 }
559
560 /* suspend all pcms */
561 for_each_card_rtds(card, rtd) {
562 if (rtd->dai_link->ignore_suspend)
563 continue;
564
565 snd_pcm_suspend_all(rtd->pcm);
566 }
567
568 snd_soc_card_suspend_pre(card);
569
570 /* close any waiting streams */
571 snd_soc_flush_all_delayed_work(card);
572
573 for_each_card_rtds(card, rtd) {
574 int stream;
575
576 if (rtd->dai_link->ignore_suspend)
577 continue;
578
579 for_each_pcm_streams(stream)
580 snd_soc_dapm_stream_event(rtd, stream,
581 SND_SOC_DAPM_STREAM_SUSPEND);
582 }
583
584 /* Recheck all endpoints too, their state is affected by suspend */
585 dapm_mark_endpoints_dirty(card);
586 snd_soc_dapm_sync(&card->dapm);
587
588 /* suspend all COMPONENTs */
589 for_each_card_rtds(card, rtd) {
590
591 if (rtd->dai_link->ignore_suspend)
592 continue;
593
594 for_each_rtd_components(rtd, i, component) {
595 struct snd_soc_dapm_context *dapm =
596 snd_soc_component_get_dapm(component);
597
598 /*
599 * ignore if component was already suspended
600 */
601 if (snd_soc_component_is_suspended(component))
602 continue;
603
604 /*
605 * If there are paths active then the COMPONENT will be
606 * held with bias _ON and should not be suspended.
607 */
608 switch (snd_soc_dapm_get_bias_level(dapm)) {
609 case SND_SOC_BIAS_STANDBY:
610 /*
611 * If the COMPONENT is capable of idle
612 * bias off then being in STANDBY
613 * means it's doing something,
614 * otherwise fall through.
615 */
616 if (dapm->idle_bias_off) {
617 dev_dbg(component->dev,
618 "ASoC: idle_bias_off CODEC on over suspend\n");
619 break;
620 }
621 fallthrough;
622
623 case SND_SOC_BIAS_OFF:
624 snd_soc_component_suspend(component);
625 if (component->regmap)
626 regcache_mark_dirty(component->regmap);
627 /* deactivate pins to sleep state */
628 pinctrl_pm_select_sleep_state(component->dev);
629 break;
630 default:
631 dev_dbg(component->dev,
632 "ASoC: COMPONENT is on over suspend\n");
633 break;
634 }
635 }
636 }
637
638 snd_soc_card_suspend_post(card);
639
640 return 0;
641}
642EXPORT_SYMBOL_GPL(snd_soc_suspend);
643
644/*
645 * deferred resume work, so resume can complete before we finished
646 * setting our codec back up, which can be very slow on I2C
647 */
648static void soc_resume_deferred(struct work_struct *work)
649{
650 struct snd_soc_card *card =
651 container_of(work, struct snd_soc_card,
652 deferred_resume_work);
653 struct snd_soc_pcm_runtime *rtd;
654 struct snd_soc_component *component;
655 int i;
656
657 /*
658 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
659 * so userspace apps are blocked from touching us
660 */
661
662 dev_dbg(card->dev, "ASoC: starting resume work\n");
663
664 /* Bring us up into D2 so that DAPM starts enabling things */
665 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
666
667 snd_soc_card_resume_pre(card);
668
669 for_each_card_components(card, component) {
670 if (snd_soc_component_is_suspended(component))
671 snd_soc_component_resume(component);
672 }
673
674 for_each_card_rtds(card, rtd) {
675 int stream;
676
677 if (rtd->dai_link->ignore_suspend)
678 continue;
679
680 for_each_pcm_streams(stream)
681 snd_soc_dapm_stream_event(rtd, stream,
682 SND_SOC_DAPM_STREAM_RESUME);
683 }
684
685 /* unmute any active DACs */
686 for_each_card_rtds(card, rtd) {
687 struct snd_soc_dai *dai;
688 int playback = SNDRV_PCM_STREAM_PLAYBACK;
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 for_each_rtd_dais(rtd, i, dai) {
694 if (snd_soc_dai_stream_active(dai, playback))
695 snd_soc_dai_digital_mute(dai, 0, playback);
696 }
697 }
698
699 snd_soc_card_resume_post(card);
700
701 dev_dbg(card->dev, "ASoC: resume work completed\n");
702
703 /* Recheck all endpoints too, their state is affected by suspend */
704 dapm_mark_endpoints_dirty(card);
705 snd_soc_dapm_sync(&card->dapm);
706
707 /* userspace can access us now we are back as we were before */
708 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
709}
710
711/* powers up audio subsystem after a suspend */
712int snd_soc_resume(struct device *dev)
713{
714 struct snd_soc_card *card = dev_get_drvdata(dev);
715 struct snd_soc_component *component;
716
717 /* If the card is not initialized yet there is nothing to do */
718 if (!card->instantiated)
719 return 0;
720
721 /* activate pins from sleep state */
722 for_each_card_components(card, component)
723 if (snd_soc_component_active(component))
724 pinctrl_pm_select_default_state(component->dev);
725
726 dev_dbg(dev, "ASoC: Scheduling resume work\n");
727 if (!schedule_work(&card->deferred_resume_work))
728 dev_err(dev, "ASoC: resume work item may be lost\n");
729
730 return 0;
731}
732EXPORT_SYMBOL_GPL(snd_soc_resume);
733
734static void soc_resume_init(struct snd_soc_card *card)
735{
736 /* deferred resume work */
737 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
738}
739#else
740#define snd_soc_suspend NULL
741#define snd_soc_resume NULL
742static inline void soc_resume_init(struct snd_soc_card *card)
743{
744}
745#endif
746
747static struct device_node
748*soc_component_to_node(struct snd_soc_component *component)
749{
750 struct device_node *of_node;
751
752 of_node = component->dev->of_node;
753 if (!of_node && component->dev->parent)
754 of_node = component->dev->parent->of_node;
755
756 return of_node;
757}
758
759static int snd_soc_is_matching_component(
760 const struct snd_soc_dai_link_component *dlc,
761 struct snd_soc_component *component)
762{
763 struct device_node *component_of_node;
764
765 if (!dlc)
766 return 0;
767
768 component_of_node = soc_component_to_node(component);
769
770 if (dlc->of_node && component_of_node != dlc->of_node)
771 return 0;
772 if (dlc->name && strcmp(component->name, dlc->name))
773 return 0;
774
775 return 1;
776}
777
778static struct snd_soc_component *soc_find_component(
779 const struct snd_soc_dai_link_component *dlc)
780{
781 struct snd_soc_component *component;
782
783 lockdep_assert_held(&client_mutex);
784
785 /*
786 * NOTE
787 *
788 * It returns *1st* found component, but some driver
789 * has few components by same of_node/name
790 * ex)
791 * CPU component and generic DMAEngine component
792 */
793 for_each_component(component)
794 if (snd_soc_is_matching_component(dlc, component))
795 return component;
796
797 return NULL;
798}
799
800/**
801 * snd_soc_find_dai - Find a registered DAI
802 *
803 * @dlc: name of the DAI or the DAI driver and optional component info to match
804 *
805 * This function will search all registered components and their DAIs to
806 * find the DAI of the same name. The component's of_node and name
807 * should also match if being specified.
808 *
809 * Return: pointer of DAI, or NULL if not found.
810 */
811struct snd_soc_dai *snd_soc_find_dai(
812 const struct snd_soc_dai_link_component *dlc)
813{
814 struct snd_soc_component *component;
815 struct snd_soc_dai *dai;
816
817 lockdep_assert_held(&client_mutex);
818
819 /* Find CPU DAI from registered DAIs */
820 for_each_component(component) {
821 if (!snd_soc_is_matching_component(dlc, component))
822 continue;
823 for_each_component_dais(component, dai) {
824 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
825 && (!dai->driver->name
826 || strcmp(dai->driver->name, dlc->dai_name)))
827 continue;
828
829 return dai;
830 }
831 }
832
833 return NULL;
834}
835EXPORT_SYMBOL_GPL(snd_soc_find_dai);
836
837struct snd_soc_dai *snd_soc_find_dai_with_mutex(
838 const struct snd_soc_dai_link_component *dlc)
839{
840 struct snd_soc_dai *dai;
841
842 mutex_lock(&client_mutex);
843 dai = snd_soc_find_dai(dlc);
844 mutex_unlock(&client_mutex);
845
846 return dai;
847}
848EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
849
850static int soc_dai_link_sanity_check(struct snd_soc_card *card,
851 struct snd_soc_dai_link *link)
852{
853 int i;
854 struct snd_soc_dai_link_component *cpu, *codec, *platform;
855
856 for_each_link_codecs(link, i, codec) {
857 /*
858 * Codec must be specified by 1 of name or OF node,
859 * not both or neither.
860 */
861 if (!!codec->name == !!codec->of_node) {
862 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
863 link->name);
864 return -EINVAL;
865 }
866
867 /* Codec DAI name must be specified */
868 if (!codec->dai_name) {
869 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
870 link->name);
871 return -EINVAL;
872 }
873
874 /*
875 * Defer card registration if codec component is not added to
876 * component list.
877 */
878 if (!soc_find_component(codec)) {
879 dev_dbg(card->dev,
880 "ASoC: codec component %s not found for link %s\n",
881 codec->name, link->name);
882 return -EPROBE_DEFER;
883 }
884 }
885
886 for_each_link_platforms(link, i, platform) {
887 /*
888 * Platform may be specified by either name or OF node, but it
889 * can be left unspecified, then no components will be inserted
890 * in the rtdcom list
891 */
892 if (!!platform->name == !!platform->of_node) {
893 dev_err(card->dev,
894 "ASoC: Neither/both platform name/of_node are set for %s\n",
895 link->name);
896 return -EINVAL;
897 }
898
899 /*
900 * Defer card registration if platform component is not added to
901 * component list.
902 */
903 if (!soc_find_component(platform)) {
904 dev_dbg(card->dev,
905 "ASoC: platform component %s not found for link %s\n",
906 platform->name, link->name);
907 return -EPROBE_DEFER;
908 }
909 }
910
911 for_each_link_cpus(link, i, cpu) {
912 /*
913 * CPU device may be specified by either name or OF node, but
914 * can be left unspecified, and will be matched based on DAI
915 * name alone..
916 */
917 if (cpu->name && cpu->of_node) {
918 dev_err(card->dev,
919 "ASoC: Neither/both cpu name/of_node are set for %s\n",
920 link->name);
921 return -EINVAL;
922 }
923
924 /*
925 * Defer card registration if cpu dai component is not added to
926 * component list.
927 */
928 if ((cpu->of_node || cpu->name) &&
929 !soc_find_component(cpu)) {
930 dev_dbg(card->dev,
931 "ASoC: cpu component %s not found for link %s\n",
932 cpu->name, link->name);
933 return -EPROBE_DEFER;
934 }
935
936 /*
937 * At least one of CPU DAI name or CPU device name/node must be
938 * specified
939 */
940 if (!cpu->dai_name &&
941 !(cpu->name || cpu->of_node)) {
942 dev_err(card->dev,
943 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
944 link->name);
945 return -EINVAL;
946 }
947 }
948
949 return 0;
950}
951
952/**
953 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
954 * @card: The ASoC card to which the pcm_runtime has
955 * @rtd: The pcm_runtime to remove
956 *
957 * This function removes a pcm_runtime from the ASoC card.
958 */
959void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
960 struct snd_soc_pcm_runtime *rtd)
961{
962 lockdep_assert_held(&client_mutex);
963
964 /* release machine specific resources */
965 snd_soc_link_exit(rtd);
966
967 /*
968 * Notify the machine driver for extra destruction
969 */
970 snd_soc_card_remove_dai_link(card, rtd->dai_link);
971
972 soc_free_pcm_runtime(rtd);
973}
974EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
975
976/**
977 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
978 * @card: The ASoC card to which the pcm_runtime is added
979 * @dai_link: The DAI link to find pcm_runtime
980 *
981 * This function adds a pcm_runtime ASoC card by using dai_link.
982 *
983 * Note: Topology can use this API to add pcm_runtime when probing the
984 * topology component. And machine drivers can still define static
985 * DAI links in dai_link array.
986 */
987int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
988 struct snd_soc_dai_link *dai_link)
989{
990 struct snd_soc_pcm_runtime *rtd;
991 struct snd_soc_dai_link_component *codec, *platform, *cpu;
992 struct snd_soc_component *component;
993 int i, ret;
994
995 lockdep_assert_held(&client_mutex);
996
997 /*
998 * Notify the machine driver for extra initialization
999 */
1000 ret = snd_soc_card_add_dai_link(card, dai_link);
1001 if (ret < 0)
1002 return ret;
1003
1004 if (dai_link->ignore)
1005 return 0;
1006
1007 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1008
1009 ret = soc_dai_link_sanity_check(card, dai_link);
1010 if (ret < 0)
1011 return ret;
1012
1013 rtd = soc_new_pcm_runtime(card, dai_link);
1014 if (!rtd)
1015 return -ENOMEM;
1016
1017 for_each_link_cpus(dai_link, i, cpu) {
1018 asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1019 if (!asoc_rtd_to_cpu(rtd, i)) {
1020 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1021 cpu->dai_name);
1022 goto _err_defer;
1023 }
1024 snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
1025 }
1026
1027 /* Find CODEC from registered CODECs */
1028 for_each_link_codecs(dai_link, i, codec) {
1029 asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1030 if (!asoc_rtd_to_codec(rtd, i)) {
1031 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1032 codec->dai_name);
1033 goto _err_defer;
1034 }
1035
1036 snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
1037 }
1038
1039 /* Find PLATFORM from registered PLATFORMs */
1040 for_each_link_platforms(dai_link, i, platform) {
1041 for_each_component(component) {
1042 if (!snd_soc_is_matching_component(platform, component))
1043 continue;
1044
1045 snd_soc_rtd_add_component(rtd, component);
1046 }
1047 }
1048
1049 return 0;
1050
1051_err_defer:
1052 snd_soc_remove_pcm_runtime(card, rtd);
1053 return -EPROBE_DEFER;
1054}
1055EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
1056
1057static int soc_init_pcm_runtime(struct snd_soc_card *card,
1058 struct snd_soc_pcm_runtime *rtd)
1059{
1060 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1061 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
1062 struct snd_soc_component *component;
1063 int ret, num, i;
1064
1065 /* set default power off timeout */
1066 rtd->pmdown_time = pmdown_time;
1067
1068 /* do machine specific initialization */
1069 ret = snd_soc_link_init(rtd);
1070 if (ret < 0)
1071 return ret;
1072
1073 if (dai_link->dai_fmt) {
1074 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1075 if (ret)
1076 return ret;
1077 }
1078
1079 /* add DPCM sysfs entries */
1080 soc_dpcm_debugfs_add(rtd);
1081
1082 num = rtd->num;
1083
1084 /*
1085 * most drivers will register their PCMs using DAI link ordering but
1086 * topology based drivers can use the DAI link id field to set PCM
1087 * device number and then use rtd + a base offset of the BEs.
1088 */
1089 for_each_rtd_components(rtd, i, component) {
1090 if (!component->driver->use_dai_pcm_id)
1091 continue;
1092
1093 if (rtd->dai_link->no_pcm)
1094 num += component->driver->be_pcm_base;
1095 else
1096 num = rtd->dai_link->id;
1097 }
1098
1099 /* create compress_device if possible */
1100 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1101 if (ret != -ENOTSUPP) {
1102 if (ret < 0)
1103 dev_err(card->dev, "ASoC: can't create compress %s\n",
1104 dai_link->stream_name);
1105 return ret;
1106 }
1107
1108 /* create the pcm */
1109 ret = soc_new_pcm(rtd, num);
1110 if (ret < 0) {
1111 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1112 dai_link->stream_name, ret);
1113 return ret;
1114 }
1115
1116 return snd_soc_pcm_dai_new(rtd);
1117}
1118
1119static void soc_set_name_prefix(struct snd_soc_card *card,
1120 struct snd_soc_component *component)
1121{
1122 struct device_node *of_node = soc_component_to_node(component);
1123 const char *str;
1124 int ret, i;
1125
1126 for (i = 0; i < card->num_configs; i++) {
1127 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1128
1129 if (snd_soc_is_matching_component(&map->dlc, component)) {
1130 component->name_prefix = map->name_prefix;
1131 return;
1132 }
1133 }
1134
1135 /*
1136 * If there is no configuration table or no match in the table,
1137 * check if a prefix is provided in the node
1138 */
1139 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1140 if (ret < 0)
1141 return;
1142
1143 component->name_prefix = str;
1144}
1145
1146static void soc_remove_component(struct snd_soc_component *component,
1147 int probed)
1148{
1149
1150 if (!component->card)
1151 return;
1152
1153 if (probed)
1154 snd_soc_component_remove(component);
1155
1156 /* For framework level robustness */
1157 snd_soc_component_set_jack(component, NULL, NULL);
1158
1159 list_del_init(&component->card_list);
1160 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1161 soc_cleanup_component_debugfs(component);
1162 component->card = NULL;
1163 snd_soc_component_module_put_when_remove(component);
1164}
1165
1166static int soc_probe_component(struct snd_soc_card *card,
1167 struct snd_soc_component *component)
1168{
1169 struct snd_soc_dapm_context *dapm =
1170 snd_soc_component_get_dapm(component);
1171 struct snd_soc_dai *dai;
1172 int probed = 0;
1173 int ret;
1174
1175 if (!strcmp(component->name, "snd-soc-dummy"))
1176 return 0;
1177
1178 if (component->card) {
1179 if (component->card != card) {
1180 dev_err(component->dev,
1181 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1182 card->name, component->card->name);
1183 return -ENODEV;
1184 }
1185 return 0;
1186 }
1187
1188 ret = snd_soc_component_module_get_when_probe(component);
1189 if (ret < 0)
1190 return ret;
1191
1192 component->card = card;
1193 soc_set_name_prefix(card, component);
1194
1195 soc_init_component_debugfs(component);
1196
1197 snd_soc_dapm_init(dapm, card, component);
1198
1199 ret = snd_soc_dapm_new_controls(dapm,
1200 component->driver->dapm_widgets,
1201 component->driver->num_dapm_widgets);
1202
1203 if (ret != 0) {
1204 dev_err(component->dev,
1205 "Failed to create new controls %d\n", ret);
1206 goto err_probe;
1207 }
1208
1209 for_each_component_dais(component, dai) {
1210 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1211 if (ret != 0) {
1212 dev_err(component->dev,
1213 "Failed to create DAI widgets %d\n", ret);
1214 goto err_probe;
1215 }
1216 }
1217
1218 ret = snd_soc_component_probe(component);
1219 if (ret < 0) {
1220 dev_err(component->dev,
1221 "ASoC: failed to probe component %d\n", ret);
1222 goto err_probe;
1223 }
1224 WARN(dapm->idle_bias_off &&
1225 dapm->bias_level != SND_SOC_BIAS_OFF,
1226 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1227 component->name);
1228 probed = 1;
1229
1230 /*
1231 * machine specific init
1232 * see
1233 * snd_soc_component_set_aux()
1234 */
1235 ret = snd_soc_component_init(component);
1236 if (ret < 0)
1237 goto err_probe;
1238
1239 ret = snd_soc_add_component_controls(component,
1240 component->driver->controls,
1241 component->driver->num_controls);
1242 if (ret < 0)
1243 goto err_probe;
1244
1245 ret = snd_soc_dapm_add_routes(dapm,
1246 component->driver->dapm_routes,
1247 component->driver->num_dapm_routes);
1248 if (ret < 0) {
1249 if (card->disable_route_checks) {
1250 dev_info(card->dev,
1251 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1252 __func__);
1253 } else {
1254 dev_err(card->dev,
1255 "%s: snd_soc_dapm_add_routes failed: %d\n",
1256 __func__, ret);
1257 goto err_probe;
1258 }
1259 }
1260
1261 /* see for_each_card_components */
1262 list_add(&component->card_list, &card->component_dev_list);
1263
1264err_probe:
1265 if (ret < 0)
1266 soc_remove_component(component, probed);
1267
1268 return ret;
1269}
1270
1271static void soc_remove_link_dais(struct snd_soc_card *card)
1272{
1273 struct snd_soc_pcm_runtime *rtd;
1274 int order;
1275
1276 for_each_comp_order(order) {
1277 for_each_card_rtds(card, rtd) {
1278 /* remove all rtd connected DAIs in good order */
1279 snd_soc_pcm_dai_remove(rtd, order);
1280 }
1281 }
1282}
1283
1284static int soc_probe_link_dais(struct snd_soc_card *card)
1285{
1286 struct snd_soc_pcm_runtime *rtd;
1287 int order, ret;
1288
1289 for_each_comp_order(order) {
1290 for_each_card_rtds(card, rtd) {
1291
1292 dev_dbg(card->dev,
1293 "ASoC: probe %s dai link %d late %d\n",
1294 card->name, rtd->num, order);
1295
1296 /* probe all rtd connected DAIs in good order */
1297 ret = snd_soc_pcm_dai_probe(rtd, order);
1298 if (ret)
1299 return ret;
1300 }
1301 }
1302
1303 return 0;
1304}
1305
1306static void soc_remove_link_components(struct snd_soc_card *card)
1307{
1308 struct snd_soc_component *component;
1309 struct snd_soc_pcm_runtime *rtd;
1310 int i, order;
1311
1312 for_each_comp_order(order) {
1313 for_each_card_rtds(card, rtd) {
1314 for_each_rtd_components(rtd, i, component) {
1315 if (component->driver->remove_order != order)
1316 continue;
1317
1318 soc_remove_component(component, 1);
1319 }
1320 }
1321 }
1322}
1323
1324static int soc_probe_link_components(struct snd_soc_card *card)
1325{
1326 struct snd_soc_component *component;
1327 struct snd_soc_pcm_runtime *rtd;
1328 int i, ret, order;
1329
1330 for_each_comp_order(order) {
1331 for_each_card_rtds(card, rtd) {
1332 for_each_rtd_components(rtd, i, component) {
1333 if (component->driver->probe_order != order)
1334 continue;
1335
1336 ret = soc_probe_component(card, component);
1337 if (ret < 0)
1338 return ret;
1339 }
1340 }
1341 }
1342
1343 return 0;
1344}
1345
1346static void soc_unbind_aux_dev(struct snd_soc_card *card)
1347{
1348 struct snd_soc_component *component, *_component;
1349
1350 for_each_card_auxs_safe(card, component, _component) {
1351 /* for snd_soc_component_init() */
1352 snd_soc_component_set_aux(component, NULL);
1353 list_del(&component->card_aux_list);
1354 }
1355}
1356
1357static int soc_bind_aux_dev(struct snd_soc_card *card)
1358{
1359 struct snd_soc_component *component;
1360 struct snd_soc_aux_dev *aux;
1361 int i;
1362
1363 for_each_card_pre_auxs(card, i, aux) {
1364 /* codecs, usually analog devices */
1365 component = soc_find_component(&aux->dlc);
1366 if (!component)
1367 return -EPROBE_DEFER;
1368
1369 /* for snd_soc_component_init() */
1370 snd_soc_component_set_aux(component, aux);
1371 /* see for_each_card_auxs */
1372 list_add(&component->card_aux_list, &card->aux_comp_list);
1373 }
1374 return 0;
1375}
1376
1377static int soc_probe_aux_devices(struct snd_soc_card *card)
1378{
1379 struct snd_soc_component *component;
1380 int order;
1381 int ret;
1382
1383 for_each_comp_order(order) {
1384 for_each_card_auxs(card, component) {
1385 if (component->driver->probe_order != order)
1386 continue;
1387
1388 ret = soc_probe_component(card, component);
1389 if (ret < 0)
1390 return ret;
1391 }
1392 }
1393
1394 return 0;
1395}
1396
1397static void soc_remove_aux_devices(struct snd_soc_card *card)
1398{
1399 struct snd_soc_component *comp, *_comp;
1400 int order;
1401
1402 for_each_comp_order(order) {
1403 for_each_card_auxs_safe(card, comp, _comp) {
1404 if (comp->driver->remove_order == order)
1405 soc_remove_component(comp, 1);
1406 }
1407 }
1408}
1409
1410/**
1411 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1412 * @rtd: The runtime for which the DAI link format should be changed
1413 * @dai_fmt: The new DAI link format
1414 *
1415 * This function updates the DAI link format for all DAIs connected to the DAI
1416 * link for the specified runtime.
1417 *
1418 * Note: For setups with a static format set the dai_fmt field in the
1419 * corresponding snd_dai_link struct instead of using this function.
1420 *
1421 * Returns 0 on success, otherwise a negative error code.
1422 */
1423int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1424 unsigned int dai_fmt)
1425{
1426 struct snd_soc_dai *cpu_dai;
1427 struct snd_soc_dai *codec_dai;
1428 unsigned int inv_dai_fmt;
1429 unsigned int i;
1430 int ret;
1431
1432 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1433 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1434 if (ret != 0 && ret != -ENOTSUPP) {
1435 dev_warn(codec_dai->dev,
1436 "ASoC: Failed to set DAI format: %d\n", ret);
1437 return ret;
1438 }
1439 }
1440
1441 /*
1442 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1443 * the component which has non_legacy_dai_naming is Codec
1444 */
1445 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1446 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1447 case SND_SOC_DAIFMT_CBM_CFM:
1448 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1449 break;
1450 case SND_SOC_DAIFMT_CBM_CFS:
1451 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1452 break;
1453 case SND_SOC_DAIFMT_CBS_CFM:
1454 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1455 break;
1456 case SND_SOC_DAIFMT_CBS_CFS:
1457 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1458 break;
1459 }
1460 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1461 unsigned int fmt = dai_fmt;
1462
1463 if (cpu_dai->component->driver->non_legacy_dai_naming)
1464 fmt = inv_dai_fmt;
1465
1466 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
1467 if (ret != 0 && ret != -ENOTSUPP) {
1468 dev_warn(cpu_dai->dev,
1469 "ASoC: Failed to set DAI format: %d\n", ret);
1470 return ret;
1471 }
1472 }
1473
1474 return 0;
1475}
1476EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1477
1478#ifdef CONFIG_DMI
1479/*
1480 * If a DMI filed contain strings in this blacklist (e.g.
1481 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1482 * as invalid and dropped when setting the card long name from DMI info.
1483 */
1484static const char * const dmi_blacklist[] = {
1485 "To be filled by OEM",
1486 "TBD by OEM",
1487 "Default String",
1488 "Board Manufacturer",
1489 "Board Vendor Name",
1490 "Board Product Name",
1491 NULL, /* terminator */
1492};
1493
1494/*
1495 * Trim special characters, and replace '-' with '_' since '-' is used to
1496 * separate different DMI fields in the card long name. Only number and
1497 * alphabet characters and a few separator characters are kept.
1498 */
1499static void cleanup_dmi_name(char *name)
1500{
1501 int i, j = 0;
1502
1503 for (i = 0; name[i]; i++) {
1504 if (isalnum(name[i]) || (name[i] == '.')
1505 || (name[i] == '_'))
1506 name[j++] = name[i];
1507 else if (name[i] == '-')
1508 name[j++] = '_';
1509 }
1510
1511 name[j] = '\0';
1512}
1513
1514/*
1515 * Check if a DMI field is valid, i.e. not containing any string
1516 * in the black list.
1517 */
1518static int is_dmi_valid(const char *field)
1519{
1520 int i = 0;
1521
1522 while (dmi_blacklist[i]) {
1523 if (strstr(field, dmi_blacklist[i]))
1524 return 0;
1525 i++;
1526 }
1527
1528 return 1;
1529}
1530
1531/*
1532 * Append a string to card->dmi_longname with character cleanups.
1533 */
1534static void append_dmi_string(struct snd_soc_card *card, const char *str)
1535{
1536 char *dst = card->dmi_longname;
1537 size_t dst_len = sizeof(card->dmi_longname);
1538 size_t len;
1539
1540 len = strlen(dst);
1541 snprintf(dst + len, dst_len - len, "-%s", str);
1542
1543 len++; /* skip the separator "-" */
1544 if (len < dst_len)
1545 cleanup_dmi_name(dst + len);
1546}
1547
1548/**
1549 * snd_soc_set_dmi_name() - Register DMI names to card
1550 * @card: The card to register DMI names
1551 * @flavour: The flavour "differentiator" for the card amongst its peers.
1552 *
1553 * An Intel machine driver may be used by many different devices but are
1554 * difficult for userspace to differentiate, since machine drivers ususally
1555 * use their own name as the card short name and leave the card long name
1556 * blank. To differentiate such devices and fix bugs due to lack of
1557 * device-specific configurations, this function allows DMI info to be used
1558 * as the sound card long name, in the format of
1559 * "vendor-product-version-board"
1560 * (Character '-' is used to separate different DMI fields here).
1561 * This will help the user space to load the device-specific Use Case Manager
1562 * (UCM) configurations for the card.
1563 *
1564 * Possible card long names may be:
1565 * DellInc.-XPS139343-01-0310JH
1566 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1567 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1568 *
1569 * This function also supports flavoring the card longname to provide
1570 * the extra differentiation, like "vendor-product-version-board-flavor".
1571 *
1572 * We only keep number and alphabet characters and a few separator characters
1573 * in the card long name since UCM in the user space uses the card long names
1574 * as card configuration directory names and AudoConf cannot support special
1575 * charactors like SPACE.
1576 *
1577 * Returns 0 on success, otherwise a negative error code.
1578 */
1579int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1580{
1581 const char *vendor, *product, *product_version, *board;
1582
1583 if (card->long_name)
1584 return 0; /* long name already set by driver or from DMI */
1585
1586 /* make up dmi long name as: vendor-product-version-board */
1587 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1588 if (!vendor || !is_dmi_valid(vendor)) {
1589 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1590 return 0;
1591 }
1592
1593 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1594 cleanup_dmi_name(card->dmi_longname);
1595
1596 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1597 if (product && is_dmi_valid(product)) {
1598 append_dmi_string(card, product);
1599
1600 /*
1601 * some vendors like Lenovo may only put a self-explanatory
1602 * name in the product version field
1603 */
1604 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1605 if (product_version && is_dmi_valid(product_version))
1606 append_dmi_string(card, product_version);
1607 }
1608
1609 board = dmi_get_system_info(DMI_BOARD_NAME);
1610 if (board && is_dmi_valid(board)) {
1611 if (!product || strcasecmp(board, product))
1612 append_dmi_string(card, board);
1613 } else if (!product) {
1614 /* fall back to using legacy name */
1615 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1616 return 0;
1617 }
1618
1619 /* Add flavour to dmi long name */
1620 if (flavour)
1621 append_dmi_string(card, flavour);
1622
1623 /* set the card long name */
1624 card->long_name = card->dmi_longname;
1625
1626 return 0;
1627}
1628EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1629#endif /* CONFIG_DMI */
1630
1631static void soc_check_tplg_fes(struct snd_soc_card *card)
1632{
1633 struct snd_soc_component *component;
1634 const struct snd_soc_component_driver *comp_drv;
1635 struct snd_soc_dai_link *dai_link;
1636 int i;
1637
1638 for_each_component(component) {
1639
1640 /* does this component override BEs ? */
1641 if (!component->driver->ignore_machine)
1642 continue;
1643
1644 /* for this machine ? */
1645 if (!strcmp(component->driver->ignore_machine,
1646 card->dev->driver->name))
1647 goto match;
1648 if (strcmp(component->driver->ignore_machine,
1649 dev_name(card->dev)))
1650 continue;
1651match:
1652 /* machine matches, so override the rtd data */
1653 for_each_card_prelinks(card, i, dai_link) {
1654
1655 /* ignore this FE */
1656 if (dai_link->dynamic) {
1657 dai_link->ignore = true;
1658 continue;
1659 }
1660
1661 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1662 card->dai_link[i].name);
1663
1664 /* override platform component */
1665 if (!dai_link->platforms) {
1666 dev_err(card->dev, "init platform error");
1667 continue;
1668 }
1669 dai_link->platforms->name = component->name;
1670
1671 /* convert non BE into BE */
1672 if (!dai_link->no_pcm) {
1673 dai_link->no_pcm = 1;
1674
1675 if (dai_link->dpcm_playback)
1676 dev_warn(card->dev,
1677 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1678 dai_link->name);
1679 if (dai_link->dpcm_capture)
1680 dev_warn(card->dev,
1681 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1682 dai_link->name);
1683
1684 /* convert normal link into DPCM one */
1685 if (!(dai_link->dpcm_playback ||
1686 dai_link->dpcm_capture)) {
1687 dai_link->dpcm_playback = !dai_link->capture_only;
1688 dai_link->dpcm_capture = !dai_link->playback_only;
1689 }
1690 }
1691
1692 /*
1693 * override any BE fixups
1694 * see
1695 * snd_soc_link_be_hw_params_fixup()
1696 */
1697 dai_link->be_hw_params_fixup =
1698 component->driver->be_hw_params_fixup;
1699
1700 /*
1701 * most BE links don't set stream name, so set it to
1702 * dai link name if it's NULL to help bind widgets.
1703 */
1704 if (!dai_link->stream_name)
1705 dai_link->stream_name = dai_link->name;
1706 }
1707
1708 /* Inform userspace we are using alternate topology */
1709 if (component->driver->topology_name_prefix) {
1710
1711 /* topology shortname created? */
1712 if (!card->topology_shortname_created) {
1713 comp_drv = component->driver;
1714
1715 snprintf(card->topology_shortname, 32, "%s-%s",
1716 comp_drv->topology_name_prefix,
1717 card->name);
1718 card->topology_shortname_created = true;
1719 }
1720
1721 /* use topology shortname */
1722 card->name = card->topology_shortname;
1723 }
1724 }
1725}
1726
1727#define soc_setup_card_name(name, name1, name2, norm) \
1728 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1729static void __soc_setup_card_name(char *name, int len,
1730 const char *name1, const char *name2,
1731 int normalization)
1732{
1733 int i;
1734
1735 snprintf(name, len, "%s", name1 ? name1 : name2);
1736
1737 if (!normalization)
1738 return;
1739
1740 /*
1741 * Name normalization
1742 *
1743 * The driver name is somewhat special, as it's used as a key for
1744 * searches in the user-space.
1745 *
1746 * ex)
1747 * "abcd??efg" -> "abcd__efg"
1748 */
1749 for (i = 0; i < len; i++) {
1750 switch (name[i]) {
1751 case '_':
1752 case '-':
1753 case '\0':
1754 break;
1755 default:
1756 if (!isalnum(name[i]))
1757 name[i] = '_';
1758 break;
1759 }
1760 }
1761}
1762
1763static void soc_cleanup_card_resources(struct snd_soc_card *card)
1764{
1765 struct snd_soc_pcm_runtime *rtd, *n;
1766
1767 if (card->snd_card)
1768 snd_card_disconnect_sync(card->snd_card);
1769
1770 snd_soc_dapm_shutdown(card);
1771
1772 /* remove and free each DAI */
1773 soc_remove_link_dais(card);
1774 soc_remove_link_components(card);
1775
1776 for_each_card_rtds_safe(card, rtd, n)
1777 snd_soc_remove_pcm_runtime(card, rtd);
1778
1779 /* remove auxiliary devices */
1780 soc_remove_aux_devices(card);
1781 soc_unbind_aux_dev(card);
1782
1783 snd_soc_dapm_free(&card->dapm);
1784 soc_cleanup_card_debugfs(card);
1785
1786 /* remove the card */
1787 snd_soc_card_remove(card);
1788
1789 if (card->snd_card) {
1790 snd_card_free(card->snd_card);
1791 card->snd_card = NULL;
1792 }
1793}
1794
1795static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1796{
1797 if (card->instantiated) {
1798 card->instantiated = false;
1799 snd_soc_flush_all_delayed_work(card);
1800
1801 soc_cleanup_card_resources(card);
1802 if (!unregister)
1803 list_add(&card->list, &unbind_card_list);
1804 } else {
1805 if (unregister)
1806 list_del(&card->list);
1807 }
1808}
1809
1810static int snd_soc_bind_card(struct snd_soc_card *card)
1811{
1812 struct snd_soc_pcm_runtime *rtd;
1813 struct snd_soc_component *component;
1814 struct snd_soc_dai_link *dai_link;
1815 int ret, i;
1816
1817 mutex_lock(&client_mutex);
1818 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1819
1820 snd_soc_dapm_init(&card->dapm, card, NULL);
1821
1822 /* check whether any platform is ignore machine FE and using topology */
1823 soc_check_tplg_fes(card);
1824
1825 /* bind aux_devs too */
1826 ret = soc_bind_aux_dev(card);
1827 if (ret < 0)
1828 goto probe_end;
1829
1830 /* add predefined DAI links to the list */
1831 card->num_rtd = 0;
1832 for_each_card_prelinks(card, i, dai_link) {
1833 ret = snd_soc_add_pcm_runtime(card, dai_link);
1834 if (ret < 0)
1835 goto probe_end;
1836 }
1837
1838 /* card bind complete so register a sound card */
1839 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1840 card->owner, 0, &card->snd_card);
1841 if (ret < 0) {
1842 dev_err(card->dev,
1843 "ASoC: can't create sound card for card %s: %d\n",
1844 card->name, ret);
1845 goto probe_end;
1846 }
1847
1848 soc_init_card_debugfs(card);
1849
1850 soc_resume_init(card);
1851
1852 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1853 card->num_dapm_widgets);
1854 if (ret < 0)
1855 goto probe_end;
1856
1857 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1858 card->num_of_dapm_widgets);
1859 if (ret < 0)
1860 goto probe_end;
1861
1862 /* initialise the sound card only once */
1863 ret = snd_soc_card_probe(card);
1864 if (ret < 0)
1865 goto probe_end;
1866
1867 /* probe all components used by DAI links on this card */
1868 ret = soc_probe_link_components(card);
1869 if (ret < 0) {
1870 dev_err(card->dev,
1871 "ASoC: failed to instantiate card %d\n", ret);
1872 goto probe_end;
1873 }
1874
1875 /* probe auxiliary components */
1876 ret = soc_probe_aux_devices(card);
1877 if (ret < 0) {
1878 dev_err(card->dev,
1879 "ASoC: failed to probe aux component %d\n", ret);
1880 goto probe_end;
1881 }
1882
1883 /* probe all DAI links on this card */
1884 ret = soc_probe_link_dais(card);
1885 if (ret < 0) {
1886 dev_err(card->dev,
1887 "ASoC: failed to instantiate card %d\n", ret);
1888 goto probe_end;
1889 }
1890
1891 for_each_card_rtds(card, rtd) {
1892 ret = soc_init_pcm_runtime(card, rtd);
1893 if (ret < 0)
1894 goto probe_end;
1895 }
1896
1897 snd_soc_dapm_link_dai_widgets(card);
1898 snd_soc_dapm_connect_dai_link_widgets(card);
1899
1900 ret = snd_soc_add_card_controls(card, card->controls,
1901 card->num_controls);
1902 if (ret < 0)
1903 goto probe_end;
1904
1905 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1906 card->num_dapm_routes);
1907 if (ret < 0) {
1908 if (card->disable_route_checks) {
1909 dev_info(card->dev,
1910 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1911 __func__);
1912 } else {
1913 dev_err(card->dev,
1914 "%s: snd_soc_dapm_add_routes failed: %d\n",
1915 __func__, ret);
1916 goto probe_end;
1917 }
1918 }
1919
1920 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1921 card->num_of_dapm_routes);
1922 if (ret < 0)
1923 goto probe_end;
1924
1925 /* try to set some sane longname if DMI is available */
1926 snd_soc_set_dmi_name(card, NULL);
1927
1928 soc_setup_card_name(card->snd_card->shortname,
1929 card->name, NULL, 0);
1930 soc_setup_card_name(card->snd_card->longname,
1931 card->long_name, card->name, 0);
1932 soc_setup_card_name(card->snd_card->driver,
1933 card->driver_name, card->name, 1);
1934
1935 if (card->components) {
1936 /* the current implementation of snd_component_add() accepts */
1937 /* multiple components in the string separated by space, */
1938 /* but the string collision (identical string) check might */
1939 /* not work correctly */
1940 ret = snd_component_add(card->snd_card, card->components);
1941 if (ret < 0) {
1942 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
1943 card->name, ret);
1944 goto probe_end;
1945 }
1946 }
1947
1948 ret = snd_soc_card_late_probe(card);
1949 if (ret < 0)
1950 goto probe_end;
1951
1952 snd_soc_dapm_new_widgets(card);
1953
1954 ret = snd_card_register(card->snd_card);
1955 if (ret < 0) {
1956 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1957 ret);
1958 goto probe_end;
1959 }
1960
1961 card->instantiated = 1;
1962 dapm_mark_endpoints_dirty(card);
1963 snd_soc_dapm_sync(&card->dapm);
1964
1965 /* deactivate pins to sleep state */
1966 for_each_card_components(card, component)
1967 if (!snd_soc_component_active(component))
1968 pinctrl_pm_select_sleep_state(component->dev);
1969
1970probe_end:
1971 if (ret < 0)
1972 soc_cleanup_card_resources(card);
1973
1974 mutex_unlock(&card->mutex);
1975 mutex_unlock(&client_mutex);
1976
1977 return ret;
1978}
1979
1980/* probes a new socdev */
1981static int soc_probe(struct platform_device *pdev)
1982{
1983 struct snd_soc_card *card = platform_get_drvdata(pdev);
1984
1985 /*
1986 * no card, so machine driver should be registering card
1987 * we should not be here in that case so ret error
1988 */
1989 if (!card)
1990 return -EINVAL;
1991
1992 dev_warn(&pdev->dev,
1993 "ASoC: machine %s should use snd_soc_register_card()\n",
1994 card->name);
1995
1996 /* Bodge while we unpick instantiation */
1997 card->dev = &pdev->dev;
1998
1999 return snd_soc_register_card(card);
2000}
2001
2002/* removes a socdev */
2003static int soc_remove(struct platform_device *pdev)
2004{
2005 struct snd_soc_card *card = platform_get_drvdata(pdev);
2006
2007 snd_soc_unregister_card(card);
2008 return 0;
2009}
2010
2011int snd_soc_poweroff(struct device *dev)
2012{
2013 struct snd_soc_card *card = dev_get_drvdata(dev);
2014 struct snd_soc_component *component;
2015
2016 if (!card->instantiated)
2017 return 0;
2018
2019 /*
2020 * Flush out pmdown_time work - we actually do want to run it
2021 * now, we're shutting down so no imminent restart.
2022 */
2023 snd_soc_flush_all_delayed_work(card);
2024
2025 snd_soc_dapm_shutdown(card);
2026
2027 /* deactivate pins to sleep state */
2028 for_each_card_components(card, component)
2029 pinctrl_pm_select_sleep_state(component->dev);
2030
2031 return 0;
2032}
2033EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2034
2035const struct dev_pm_ops snd_soc_pm_ops = {
2036 .suspend = snd_soc_suspend,
2037 .resume = snd_soc_resume,
2038 .freeze = snd_soc_suspend,
2039 .thaw = snd_soc_resume,
2040 .poweroff = snd_soc_poweroff,
2041 .restore = snd_soc_resume,
2042};
2043EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2044
2045/* ASoC platform driver */
2046static struct platform_driver soc_driver = {
2047 .driver = {
2048 .name = "soc-audio",
2049 .pm = &snd_soc_pm_ops,
2050 },
2051 .probe = soc_probe,
2052 .remove = soc_remove,
2053};
2054
2055/**
2056 * snd_soc_cnew - create new control
2057 * @_template: control template
2058 * @data: control private data
2059 * @long_name: control long name
2060 * @prefix: control name prefix
2061 *
2062 * Create a new mixer control from a template control.
2063 *
2064 * Returns 0 for success, else error.
2065 */
2066struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2067 void *data, const char *long_name,
2068 const char *prefix)
2069{
2070 struct snd_kcontrol_new template;
2071 struct snd_kcontrol *kcontrol;
2072 char *name = NULL;
2073
2074 memcpy(&template, _template, sizeof(template));
2075 template.index = 0;
2076
2077 if (!long_name)
2078 long_name = template.name;
2079
2080 if (prefix) {
2081 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2082 if (!name)
2083 return NULL;
2084
2085 template.name = name;
2086 } else {
2087 template.name = long_name;
2088 }
2089
2090 kcontrol = snd_ctl_new1(&template, data);
2091
2092 kfree(name);
2093
2094 return kcontrol;
2095}
2096EXPORT_SYMBOL_GPL(snd_soc_cnew);
2097
2098static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2099 const struct snd_kcontrol_new *controls, int num_controls,
2100 const char *prefix, void *data)
2101{
2102 int err, i;
2103
2104 for (i = 0; i < num_controls; i++) {
2105 const struct snd_kcontrol_new *control = &controls[i];
2106
2107 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2108 control->name, prefix));
2109 if (err < 0) {
2110 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2111 control->name, err);
2112 return err;
2113 }
2114 }
2115
2116 return 0;
2117}
2118
2119/**
2120 * snd_soc_add_component_controls - Add an array of controls to a component.
2121 *
2122 * @component: Component to add controls to
2123 * @controls: Array of controls to add
2124 * @num_controls: Number of elements in the array
2125 *
2126 * Return: 0 for success, else error.
2127 */
2128int snd_soc_add_component_controls(struct snd_soc_component *component,
2129 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2130{
2131 struct snd_card *card = component->card->snd_card;
2132
2133 return snd_soc_add_controls(card, component->dev, controls,
2134 num_controls, component->name_prefix, component);
2135}
2136EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2137
2138/**
2139 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2140 * Convenience function to add a list of controls.
2141 *
2142 * @soc_card: SoC card to add controls to
2143 * @controls: array of controls to add
2144 * @num_controls: number of elements in the array
2145 *
2146 * Return 0 for success, else error.
2147 */
2148int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2149 const struct snd_kcontrol_new *controls, int num_controls)
2150{
2151 struct snd_card *card = soc_card->snd_card;
2152
2153 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2154 NULL, soc_card);
2155}
2156EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2157
2158/**
2159 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2160 * Convienience function to add a list of controls.
2161 *
2162 * @dai: DAI to add controls to
2163 * @controls: array of controls to add
2164 * @num_controls: number of elements in the array
2165 *
2166 * Return 0 for success, else error.
2167 */
2168int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2169 const struct snd_kcontrol_new *controls, int num_controls)
2170{
2171 struct snd_card *card = dai->component->card->snd_card;
2172
2173 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2174 NULL, dai);
2175}
2176EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2177
2178/**
2179 * snd_soc_register_card - Register a card with the ASoC core
2180 *
2181 * @card: Card to register
2182 *
2183 */
2184int snd_soc_register_card(struct snd_soc_card *card)
2185{
2186 if (!card->name || !card->dev)
2187 return -EINVAL;
2188
2189 dev_set_drvdata(card->dev, card);
2190
2191 INIT_LIST_HEAD(&card->widgets);
2192 INIT_LIST_HEAD(&card->paths);
2193 INIT_LIST_HEAD(&card->dapm_list);
2194 INIT_LIST_HEAD(&card->aux_comp_list);
2195 INIT_LIST_HEAD(&card->component_dev_list);
2196 INIT_LIST_HEAD(&card->list);
2197 INIT_LIST_HEAD(&card->rtd_list);
2198 INIT_LIST_HEAD(&card->dapm_dirty);
2199 INIT_LIST_HEAD(&card->dobj_list);
2200
2201 card->instantiated = 0;
2202 mutex_init(&card->mutex);
2203 mutex_init(&card->dapm_mutex);
2204 mutex_init(&card->pcm_mutex);
2205 spin_lock_init(&card->dpcm_lock);
2206
2207 return snd_soc_bind_card(card);
2208}
2209EXPORT_SYMBOL_GPL(snd_soc_register_card);
2210
2211/**
2212 * snd_soc_unregister_card - Unregister a card with the ASoC core
2213 *
2214 * @card: Card to unregister
2215 *
2216 */
2217int snd_soc_unregister_card(struct snd_soc_card *card)
2218{
2219 mutex_lock(&client_mutex);
2220 snd_soc_unbind_card(card, true);
2221 mutex_unlock(&client_mutex);
2222 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2223
2224 return 0;
2225}
2226EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2227
2228/*
2229 * Simplify DAI link configuration by removing ".-1" from device names
2230 * and sanitizing names.
2231 */
2232static char *fmt_single_name(struct device *dev, int *id)
2233{
2234 char *found, name[NAME_SIZE];
2235 int id1, id2;
2236
2237 if (dev_name(dev) == NULL)
2238 return NULL;
2239
2240 strlcpy(name, dev_name(dev), NAME_SIZE);
2241
2242 /* are we a "%s.%d" name (platform and SPI components) */
2243 found = strstr(name, dev->driver->name);
2244 if (found) {
2245 /* get ID */
2246 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2247
2248 /* discard ID from name if ID == -1 */
2249 if (*id == -1)
2250 found[strlen(dev->driver->name)] = '\0';
2251 }
2252
2253 } else {
2254 /* I2C component devices are named "bus-addr" */
2255 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2256 char tmp[NAME_SIZE];
2257
2258 /* create unique ID number from I2C addr and bus */
2259 *id = ((id1 & 0xffff) << 16) + id2;
2260
2261 /* sanitize component name for DAI link creation */
2262 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2263 name);
2264 strlcpy(name, tmp, NAME_SIZE);
2265 } else
2266 *id = 0;
2267 }
2268
2269 return devm_kstrdup(dev, name, GFP_KERNEL);
2270}
2271
2272/*
2273 * Simplify DAI link naming for single devices with multiple DAIs by removing
2274 * any ".-1" and using the DAI name (instead of device name).
2275 */
2276static inline char *fmt_multiple_name(struct device *dev,
2277 struct snd_soc_dai_driver *dai_drv)
2278{
2279 if (dai_drv->name == NULL) {
2280 dev_err(dev,
2281 "ASoC: error - multiple DAI %s registered with no name\n",
2282 dev_name(dev));
2283 return NULL;
2284 }
2285
2286 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2287}
2288
2289void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2290{
2291 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2292 list_del(&dai->list);
2293}
2294EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2295
2296/**
2297 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2298 *
2299 * @component: The component the DAIs are registered for
2300 * @dai_drv: DAI driver to use for the DAI
2301 * @legacy_dai_naming: if %true, use legacy single-name format;
2302 * if %false, use multiple-name format;
2303 *
2304 * Topology can use this API to register DAIs when probing a component.
2305 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2306 * will be freed in the component cleanup.
2307 */
2308struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2309 struct snd_soc_dai_driver *dai_drv,
2310 bool legacy_dai_naming)
2311{
2312 struct device *dev = component->dev;
2313 struct snd_soc_dai *dai;
2314
2315 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2316
2317 lockdep_assert_held(&client_mutex);
2318
2319 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2320 if (dai == NULL)
2321 return NULL;
2322
2323 /*
2324 * Back in the old days when we still had component-less DAIs,
2325 * instead of having a static name, component-less DAIs would
2326 * inherit the name of the parent device so it is possible to
2327 * register multiple instances of the DAI. We still need to keep
2328 * the same naming style even though those DAIs are not
2329 * component-less anymore.
2330 */
2331 if (legacy_dai_naming &&
2332 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2333 dai->name = fmt_single_name(dev, &dai->id);
2334 } else {
2335 dai->name = fmt_multiple_name(dev, dai_drv);
2336 if (dai_drv->id)
2337 dai->id = dai_drv->id;
2338 else
2339 dai->id = component->num_dai;
2340 }
2341 if (!dai->name)
2342 return NULL;
2343
2344 dai->component = component;
2345 dai->dev = dev;
2346 dai->driver = dai_drv;
2347
2348 /* see for_each_component_dais */
2349 list_add_tail(&dai->list, &component->dai_list);
2350 component->num_dai++;
2351
2352 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2353 return dai;
2354}
2355
2356/**
2357 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2358 *
2359 * @component: The component for which the DAIs should be unregistered
2360 */
2361static void snd_soc_unregister_dais(struct snd_soc_component *component)
2362{
2363 struct snd_soc_dai *dai, *_dai;
2364
2365 for_each_component_dais_safe(component, dai, _dai)
2366 snd_soc_unregister_dai(dai);
2367}
2368
2369/**
2370 * snd_soc_register_dais - Register a DAI with the ASoC core
2371 *
2372 * @component: The component the DAIs are registered for
2373 * @dai_drv: DAI driver to use for the DAIs
2374 * @count: Number of DAIs
2375 */
2376static int snd_soc_register_dais(struct snd_soc_component *component,
2377 struct snd_soc_dai_driver *dai_drv,
2378 size_t count)
2379{
2380 struct snd_soc_dai *dai;
2381 unsigned int i;
2382 int ret;
2383
2384 for (i = 0; i < count; i++) {
2385 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2386 !component->driver->non_legacy_dai_naming);
2387 if (dai == NULL) {
2388 ret = -ENOMEM;
2389 goto err;
2390 }
2391 }
2392
2393 return 0;
2394
2395err:
2396 snd_soc_unregister_dais(component);
2397
2398 return ret;
2399}
2400
2401#define ENDIANNESS_MAP(name) \
2402 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2403static u64 endianness_format_map[] = {
2404 ENDIANNESS_MAP(S16_),
2405 ENDIANNESS_MAP(U16_),
2406 ENDIANNESS_MAP(S24_),
2407 ENDIANNESS_MAP(U24_),
2408 ENDIANNESS_MAP(S32_),
2409 ENDIANNESS_MAP(U32_),
2410 ENDIANNESS_MAP(S24_3),
2411 ENDIANNESS_MAP(U24_3),
2412 ENDIANNESS_MAP(S20_3),
2413 ENDIANNESS_MAP(U20_3),
2414 ENDIANNESS_MAP(S18_3),
2415 ENDIANNESS_MAP(U18_3),
2416 ENDIANNESS_MAP(FLOAT_),
2417 ENDIANNESS_MAP(FLOAT64_),
2418 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2419};
2420
2421/*
2422 * Fix up the DAI formats for endianness: codecs don't actually see
2423 * the endianness of the data but we're using the CPU format
2424 * definitions which do need to include endianness so we ensure that
2425 * codec DAIs always have both big and little endian variants set.
2426 */
2427static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2428{
2429 int i;
2430
2431 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2432 if (stream->formats & endianness_format_map[i])
2433 stream->formats |= endianness_format_map[i];
2434}
2435
2436static void snd_soc_try_rebind_card(void)
2437{
2438 struct snd_soc_card *card, *c;
2439
2440 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2441 if (!snd_soc_bind_card(card))
2442 list_del(&card->list);
2443}
2444
2445static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2446{
2447 struct snd_soc_card *card = component->card;
2448
2449 snd_soc_unregister_dais(component);
2450
2451 if (card)
2452 snd_soc_unbind_card(card, false);
2453
2454 list_del(&component->list);
2455}
2456
2457int snd_soc_component_initialize(struct snd_soc_component *component,
2458 const struct snd_soc_component_driver *driver,
2459 struct device *dev)
2460{
2461 INIT_LIST_HEAD(&component->dai_list);
2462 INIT_LIST_HEAD(&component->dobj_list);
2463 INIT_LIST_HEAD(&component->card_list);
2464 mutex_init(&component->io_mutex);
2465
2466 component->name = fmt_single_name(dev, &component->id);
2467 if (!component->name) {
2468 dev_err(dev, "ASoC: Failed to allocate name\n");
2469 return -ENOMEM;
2470 }
2471
2472 component->dev = dev;
2473 component->driver = driver;
2474
2475 return 0;
2476}
2477EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2478
2479int snd_soc_add_component(struct snd_soc_component *component,
2480 struct snd_soc_dai_driver *dai_drv,
2481 int num_dai)
2482{
2483 int ret;
2484 int i;
2485
2486 mutex_lock(&client_mutex);
2487
2488 if (component->driver->endianness) {
2489 for (i = 0; i < num_dai; i++) {
2490 convert_endianness_formats(&dai_drv[i].playback);
2491 convert_endianness_formats(&dai_drv[i].capture);
2492 }
2493 }
2494
2495 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2496 if (ret < 0) {
2497 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2498 ret);
2499 goto err_cleanup;
2500 }
2501
2502 if (!component->driver->write && !component->driver->read) {
2503 if (!component->regmap)
2504 component->regmap = dev_get_regmap(component->dev,
2505 NULL);
2506 if (component->regmap)
2507 snd_soc_component_setup_regmap(component);
2508 }
2509
2510 /* see for_each_component */
2511 list_add(&component->list, &component_list);
2512
2513err_cleanup:
2514 if (ret < 0)
2515 snd_soc_del_component_unlocked(component);
2516
2517 mutex_unlock(&client_mutex);
2518
2519 if (ret == 0)
2520 snd_soc_try_rebind_card();
2521
2522 return ret;
2523}
2524EXPORT_SYMBOL_GPL(snd_soc_add_component);
2525
2526int snd_soc_register_component(struct device *dev,
2527 const struct snd_soc_component_driver *component_driver,
2528 struct snd_soc_dai_driver *dai_drv,
2529 int num_dai)
2530{
2531 struct snd_soc_component *component;
2532 int ret;
2533
2534 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2535 if (!component)
2536 return -ENOMEM;
2537
2538 ret = snd_soc_component_initialize(component, component_driver, dev);
2539 if (ret < 0)
2540 return ret;
2541
2542 return snd_soc_add_component(component, dai_drv, num_dai);
2543}
2544EXPORT_SYMBOL_GPL(snd_soc_register_component);
2545
2546/**
2547 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2548 * from the ASoC core
2549 *
2550 * @dev: The device to unregister
2551 * @component_driver: The component driver to unregister
2552 */
2553void snd_soc_unregister_component_by_driver(struct device *dev,
2554 const struct snd_soc_component_driver *component_driver)
2555{
2556 struct snd_soc_component *component;
2557
2558 if (!component_driver)
2559 return;
2560
2561 mutex_lock(&client_mutex);
2562 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2563 if (!component)
2564 goto out;
2565
2566 snd_soc_del_component_unlocked(component);
2567
2568out:
2569 mutex_unlock(&client_mutex);
2570}
2571EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2572
2573/**
2574 * snd_soc_unregister_component - Unregister all related component
2575 * from the ASoC core
2576 *
2577 * @dev: The device to unregister
2578 */
2579void snd_soc_unregister_component(struct device *dev)
2580{
2581 struct snd_soc_component *component;
2582
2583 mutex_lock(&client_mutex);
2584 while (1) {
2585 component = snd_soc_lookup_component_nolocked(dev, NULL);
2586 if (!component)
2587 break;
2588
2589 snd_soc_del_component_unlocked(component);
2590 }
2591 mutex_unlock(&client_mutex);
2592}
2593EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2594
2595/* Retrieve a card's name from device tree */
2596int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2597 const char *propname)
2598{
2599 struct device_node *np;
2600 int ret;
2601
2602 if (!card->dev) {
2603 pr_err("card->dev is not set before calling %s\n", __func__);
2604 return -EINVAL;
2605 }
2606
2607 np = card->dev->of_node;
2608
2609 ret = of_property_read_string_index(np, propname, 0, &card->name);
2610 /*
2611 * EINVAL means the property does not exist. This is fine providing
2612 * card->name was previously set, which is checked later in
2613 * snd_soc_register_card.
2614 */
2615 if (ret < 0 && ret != -EINVAL) {
2616 dev_err(card->dev,
2617 "ASoC: Property '%s' could not be read: %d\n",
2618 propname, ret);
2619 return ret;
2620 }
2621
2622 return 0;
2623}
2624EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2625
2626static const struct snd_soc_dapm_widget simple_widgets[] = {
2627 SND_SOC_DAPM_MIC("Microphone", NULL),
2628 SND_SOC_DAPM_LINE("Line", NULL),
2629 SND_SOC_DAPM_HP("Headphone", NULL),
2630 SND_SOC_DAPM_SPK("Speaker", NULL),
2631};
2632
2633int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2634 const char *propname)
2635{
2636 struct device_node *np = card->dev->of_node;
2637 struct snd_soc_dapm_widget *widgets;
2638 const char *template, *wname;
2639 int i, j, num_widgets, ret;
2640
2641 num_widgets = of_property_count_strings(np, propname);
2642 if (num_widgets < 0) {
2643 dev_err(card->dev,
2644 "ASoC: Property '%s' does not exist\n", propname);
2645 return -EINVAL;
2646 }
2647 if (num_widgets & 1) {
2648 dev_err(card->dev,
2649 "ASoC: Property '%s' length is not even\n", propname);
2650 return -EINVAL;
2651 }
2652
2653 num_widgets /= 2;
2654 if (!num_widgets) {
2655 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2656 propname);
2657 return -EINVAL;
2658 }
2659
2660 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2661 GFP_KERNEL);
2662 if (!widgets) {
2663 dev_err(card->dev,
2664 "ASoC: Could not allocate memory for widgets\n");
2665 return -ENOMEM;
2666 }
2667
2668 for (i = 0; i < num_widgets; i++) {
2669 ret = of_property_read_string_index(np, propname,
2670 2 * i, &template);
2671 if (ret) {
2672 dev_err(card->dev,
2673 "ASoC: Property '%s' index %d read error:%d\n",
2674 propname, 2 * i, ret);
2675 return -EINVAL;
2676 }
2677
2678 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2679 if (!strncmp(template, simple_widgets[j].name,
2680 strlen(simple_widgets[j].name))) {
2681 widgets[i] = simple_widgets[j];
2682 break;
2683 }
2684 }
2685
2686 if (j >= ARRAY_SIZE(simple_widgets)) {
2687 dev_err(card->dev,
2688 "ASoC: DAPM widget '%s' is not supported\n",
2689 template);
2690 return -EINVAL;
2691 }
2692
2693 ret = of_property_read_string_index(np, propname,
2694 (2 * i) + 1,
2695 &wname);
2696 if (ret) {
2697 dev_err(card->dev,
2698 "ASoC: Property '%s' index %d read error:%d\n",
2699 propname, (2 * i) + 1, ret);
2700 return -EINVAL;
2701 }
2702
2703 widgets[i].name = wname;
2704 }
2705
2706 card->of_dapm_widgets = widgets;
2707 card->num_of_dapm_widgets = num_widgets;
2708
2709 return 0;
2710}
2711EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2712
2713int snd_soc_of_get_slot_mask(struct device_node *np,
2714 const char *prop_name,
2715 unsigned int *mask)
2716{
2717 u32 val;
2718 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2719 int i;
2720
2721 if (!of_slot_mask)
2722 return 0;
2723 val /= sizeof(u32);
2724 for (i = 0; i < val; i++)
2725 if (be32_to_cpup(&of_slot_mask[i]))
2726 *mask |= (1 << i);
2727
2728 return val;
2729}
2730EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2731
2732int snd_soc_of_parse_tdm_slot(struct device_node *np,
2733 unsigned int *tx_mask,
2734 unsigned int *rx_mask,
2735 unsigned int *slots,
2736 unsigned int *slot_width)
2737{
2738 u32 val;
2739 int ret;
2740
2741 if (tx_mask)
2742 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2743 if (rx_mask)
2744 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2745
2746 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2747 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2748 if (ret)
2749 return ret;
2750
2751 if (slots)
2752 *slots = val;
2753 }
2754
2755 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2756 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2757 if (ret)
2758 return ret;
2759
2760 if (slot_width)
2761 *slot_width = val;
2762 }
2763
2764 return 0;
2765}
2766EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2767
2768void snd_soc_of_parse_node_prefix(struct device_node *np,
2769 struct snd_soc_codec_conf *codec_conf,
2770 struct device_node *of_node,
2771 const char *propname)
2772{
2773 const char *str;
2774 int ret;
2775
2776 ret = of_property_read_string(np, propname, &str);
2777 if (ret < 0) {
2778 /* no prefix is not error */
2779 return;
2780 }
2781
2782 codec_conf->dlc.of_node = of_node;
2783 codec_conf->name_prefix = str;
2784}
2785EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2786
2787int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2788 const char *propname)
2789{
2790 struct device_node *np = card->dev->of_node;
2791 int num_routes;
2792 struct snd_soc_dapm_route *routes;
2793 int i, ret;
2794
2795 num_routes = of_property_count_strings(np, propname);
2796 if (num_routes < 0 || num_routes & 1) {
2797 dev_err(card->dev,
2798 "ASoC: Property '%s' does not exist or its length is not even\n",
2799 propname);
2800 return -EINVAL;
2801 }
2802 num_routes /= 2;
2803 if (!num_routes) {
2804 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2805 propname);
2806 return -EINVAL;
2807 }
2808
2809 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2810 GFP_KERNEL);
2811 if (!routes) {
2812 dev_err(card->dev,
2813 "ASoC: Could not allocate DAPM route table\n");
2814 return -EINVAL;
2815 }
2816
2817 for (i = 0; i < num_routes; i++) {
2818 ret = of_property_read_string_index(np, propname,
2819 2 * i, &routes[i].sink);
2820 if (ret) {
2821 dev_err(card->dev,
2822 "ASoC: Property '%s' index %d could not be read: %d\n",
2823 propname, 2 * i, ret);
2824 return -EINVAL;
2825 }
2826 ret = of_property_read_string_index(np, propname,
2827 (2 * i) + 1, &routes[i].source);
2828 if (ret) {
2829 dev_err(card->dev,
2830 "ASoC: Property '%s' index %d could not be read: %d\n",
2831 propname, (2 * i) + 1, ret);
2832 return -EINVAL;
2833 }
2834 }
2835
2836 card->num_of_dapm_routes = num_routes;
2837 card->of_dapm_routes = routes;
2838
2839 return 0;
2840}
2841EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
2842
2843unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
2844 const char *prefix,
2845 struct device_node **bitclkmaster,
2846 struct device_node **framemaster)
2847{
2848 int ret, i;
2849 char prop[128];
2850 unsigned int format = 0;
2851 int bit, frame;
2852 const char *str;
2853 struct {
2854 char *name;
2855 unsigned int val;
2856 } of_fmt_table[] = {
2857 { "i2s", SND_SOC_DAIFMT_I2S },
2858 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
2859 { "left_j", SND_SOC_DAIFMT_LEFT_J },
2860 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
2861 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
2862 { "ac97", SND_SOC_DAIFMT_AC97 },
2863 { "pdm", SND_SOC_DAIFMT_PDM},
2864 { "msb", SND_SOC_DAIFMT_MSB },
2865 { "lsb", SND_SOC_DAIFMT_LSB },
2866 };
2867
2868 if (!prefix)
2869 prefix = "";
2870
2871 /*
2872 * check "dai-format = xxx"
2873 * or "[prefix]format = xxx"
2874 * SND_SOC_DAIFMT_FORMAT_MASK area
2875 */
2876 ret = of_property_read_string(np, "dai-format", &str);
2877 if (ret < 0) {
2878 snprintf(prop, sizeof(prop), "%sformat", prefix);
2879 ret = of_property_read_string(np, prop, &str);
2880 }
2881 if (ret == 0) {
2882 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
2883 if (strcmp(str, of_fmt_table[i].name) == 0) {
2884 format |= of_fmt_table[i].val;
2885 break;
2886 }
2887 }
2888 }
2889
2890 /*
2891 * check "[prefix]continuous-clock"
2892 * SND_SOC_DAIFMT_CLOCK_MASK area
2893 */
2894 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
2895 if (of_property_read_bool(np, prop))
2896 format |= SND_SOC_DAIFMT_CONT;
2897 else
2898 format |= SND_SOC_DAIFMT_GATED;
2899
2900 /*
2901 * check "[prefix]bitclock-inversion"
2902 * check "[prefix]frame-inversion"
2903 * SND_SOC_DAIFMT_INV_MASK area
2904 */
2905 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
2906 bit = !!of_get_property(np, prop, NULL);
2907
2908 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
2909 frame = !!of_get_property(np, prop, NULL);
2910
2911 switch ((bit << 4) + frame) {
2912 case 0x11:
2913 format |= SND_SOC_DAIFMT_IB_IF;
2914 break;
2915 case 0x10:
2916 format |= SND_SOC_DAIFMT_IB_NF;
2917 break;
2918 case 0x01:
2919 format |= SND_SOC_DAIFMT_NB_IF;
2920 break;
2921 default:
2922 /* SND_SOC_DAIFMT_NB_NF is default */
2923 break;
2924 }
2925
2926 /*
2927 * check "[prefix]bitclock-master"
2928 * check "[prefix]frame-master"
2929 * SND_SOC_DAIFMT_MASTER_MASK area
2930 */
2931 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
2932 bit = !!of_get_property(np, prop, NULL);
2933 if (bit && bitclkmaster)
2934 *bitclkmaster = of_parse_phandle(np, prop, 0);
2935
2936 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
2937 frame = !!of_get_property(np, prop, NULL);
2938 if (frame && framemaster)
2939 *framemaster = of_parse_phandle(np, prop, 0);
2940
2941 switch ((bit << 4) + frame) {
2942 case 0x11:
2943 format |= SND_SOC_DAIFMT_CBM_CFM;
2944 break;
2945 case 0x10:
2946 format |= SND_SOC_DAIFMT_CBM_CFS;
2947 break;
2948 case 0x01:
2949 format |= SND_SOC_DAIFMT_CBS_CFM;
2950 break;
2951 default:
2952 format |= SND_SOC_DAIFMT_CBS_CFS;
2953 break;
2954 }
2955
2956 return format;
2957}
2958EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
2959
2960int snd_soc_get_dai_id(struct device_node *ep)
2961{
2962 struct snd_soc_component *component;
2963 struct snd_soc_dai_link_component dlc;
2964 int ret;
2965
2966 dlc.of_node = of_graph_get_port_parent(ep);
2967 dlc.name = NULL;
2968 /*
2969 * For example HDMI case, HDMI has video/sound port,
2970 * but ALSA SoC needs sound port number only.
2971 * Thus counting HDMI DT port/endpoint doesn't work.
2972 * Then, it should have .of_xlate_dai_id
2973 */
2974 ret = -ENOTSUPP;
2975 mutex_lock(&client_mutex);
2976 component = soc_find_component(&dlc);
2977 if (component)
2978 ret = snd_soc_component_of_xlate_dai_id(component, ep);
2979 mutex_unlock(&client_mutex);
2980
2981 of_node_put(dlc.of_node);
2982
2983 return ret;
2984}
2985EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
2986
2987int snd_soc_get_dai_name(struct of_phandle_args *args,
2988 const char **dai_name)
2989{
2990 struct snd_soc_component *pos;
2991 struct device_node *component_of_node;
2992 int ret = -EPROBE_DEFER;
2993
2994 mutex_lock(&client_mutex);
2995 for_each_component(pos) {
2996 component_of_node = soc_component_to_node(pos);
2997
2998 if (component_of_node != args->np)
2999 continue;
3000
3001 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3002 if (ret == -ENOTSUPP) {
3003 struct snd_soc_dai *dai;
3004 int id = -1;
3005
3006 switch (args->args_count) {
3007 case 0:
3008 id = 0; /* same as dai_drv[0] */
3009 break;
3010 case 1:
3011 id = args->args[0];
3012 break;
3013 default:
3014 /* not supported */
3015 break;
3016 }
3017
3018 if (id < 0 || id >= pos->num_dai) {
3019 ret = -EINVAL;
3020 continue;
3021 }
3022
3023 ret = 0;
3024
3025 /* find target DAI */
3026 for_each_component_dais(pos, dai) {
3027 if (id == 0)
3028 break;
3029 id--;
3030 }
3031
3032 *dai_name = dai->driver->name;
3033 if (!*dai_name)
3034 *dai_name = pos->name;
3035 } else if (ret) {
3036 /*
3037 * if another error than ENOTSUPP is returned go on and
3038 * check if another component is provided with the same
3039 * node. This may happen if a device provides several
3040 * components
3041 */
3042 continue;
3043 }
3044
3045 break;
3046 }
3047 mutex_unlock(&client_mutex);
3048 return ret;
3049}
3050EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3051
3052int snd_soc_of_get_dai_name(struct device_node *of_node,
3053 const char **dai_name)
3054{
3055 struct of_phandle_args args;
3056 int ret;
3057
3058 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3059 "#sound-dai-cells", 0, &args);
3060 if (ret)
3061 return ret;
3062
3063 ret = snd_soc_get_dai_name(&args, dai_name);
3064
3065 of_node_put(args.np);
3066
3067 return ret;
3068}
3069EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3070
3071/*
3072 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3073 * @dai_link: DAI link
3074 *
3075 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3076 */
3077void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3078{
3079 struct snd_soc_dai_link_component *component;
3080 int index;
3081
3082 for_each_link_codecs(dai_link, index, component) {
3083 if (!component->of_node)
3084 break;
3085 of_node_put(component->of_node);
3086 component->of_node = NULL;
3087 }
3088}
3089EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3090
3091/*
3092 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3093 * @dev: Card device
3094 * @of_node: Device node
3095 * @dai_link: DAI link
3096 *
3097 * Builds an array of CODEC DAI components from the DAI link property
3098 * 'sound-dai'.
3099 * The array is set in the DAI link and the number of DAIs is set accordingly.
3100 * The device nodes in the array (of_node) must be dereferenced by calling
3101 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3102 *
3103 * Returns 0 for success
3104 */
3105int snd_soc_of_get_dai_link_codecs(struct device *dev,
3106 struct device_node *of_node,
3107 struct snd_soc_dai_link *dai_link)
3108{
3109 struct of_phandle_args args;
3110 struct snd_soc_dai_link_component *component;
3111 char *name;
3112 int index, num_codecs, ret;
3113
3114 /* Count the number of CODECs */
3115 name = "sound-dai";
3116 num_codecs = of_count_phandle_with_args(of_node, name,
3117 "#sound-dai-cells");
3118 if (num_codecs <= 0) {
3119 if (num_codecs == -ENOENT)
3120 dev_err(dev, "No 'sound-dai' property\n");
3121 else
3122 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3123 return num_codecs;
3124 }
3125 component = devm_kcalloc(dev,
3126 num_codecs, sizeof(*component),
3127 GFP_KERNEL);
3128 if (!component)
3129 return -ENOMEM;
3130 dai_link->codecs = component;
3131 dai_link->num_codecs = num_codecs;
3132
3133 /* Parse the list */
3134 for_each_link_codecs(dai_link, index, component) {
3135 ret = of_parse_phandle_with_args(of_node, name,
3136 "#sound-dai-cells",
3137 index, &args);
3138 if (ret)
3139 goto err;
3140 component->of_node = args.np;
3141 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3142 if (ret < 0)
3143 goto err;
3144 }
3145 return 0;
3146err:
3147 snd_soc_of_put_dai_link_codecs(dai_link);
3148 dai_link->codecs = NULL;
3149 dai_link->num_codecs = 0;
3150 return ret;
3151}
3152EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3153
3154static int __init snd_soc_init(void)
3155{
3156 snd_soc_debugfs_init();
3157 snd_soc_util_init();
3158
3159 return platform_driver_register(&soc_driver);
3160}
3161module_init(snd_soc_init);
3162
3163static void __exit snd_soc_exit(void)
3164{
3165 snd_soc_util_exit();
3166 snd_soc_debugfs_exit();
3167
3168 platform_driver_unregister(&soc_driver);
3169}
3170module_exit(snd_soc_exit);
3171
3172/* Module information */
3173MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3174MODULE_DESCRIPTION("ALSA SoC Core");
3175MODULE_LICENSE("GPL");
3176MODULE_ALIAS("platform:soc-audio");