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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 <sound/ac97_codec.h>
36#include <sound/core.h>
37#include <sound/jack.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include <sound/soc.h>
41#include <sound/initval.h>
42
43#define CREATE_TRACE_POINTS
44#include <trace/events/asoc.h>
45
46#define NAME_SIZE 32
47
48static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
49
50#ifdef CONFIG_DEBUG_FS
51struct dentry *snd_soc_debugfs_root;
52EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53#endif
54
55static DEFINE_MUTEX(client_mutex);
56static LIST_HEAD(card_list);
57static LIST_HEAD(dai_list);
58static LIST_HEAD(platform_list);
59static LIST_HEAD(codec_list);
60
61int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
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
72/* returns the minimum number of bytes needed to represent
73 * a particular given value */
74static int min_bytes_needed(unsigned long val)
75{
76 int c = 0;
77 int i;
78
79 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80 if (val & (1UL << i))
81 break;
82 c = (sizeof val * 8) - c;
83 if (!c || (c % 8))
84 c = (c + 8) / 8;
85 else
86 c /= 8;
87 return c;
88}
89
90/* fill buf which is 'len' bytes with a formatted
91 * string of the form 'reg: value\n' */
92static int format_register_str(struct snd_soc_codec *codec,
93 unsigned int reg, char *buf, size_t len)
94{
95 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96 int regsize = codec->driver->reg_word_size * 2;
97 int ret;
98 char tmpbuf[len + 1];
99 char regbuf[regsize + 1];
100
101 /* since tmpbuf is allocated on the stack, warn the callers if they
102 * try to abuse this function */
103 WARN_ON(len > 63);
104
105 /* +2 for ': ' and + 1 for '\n' */
106 if (wordsize + regsize + 2 + 1 != len)
107 return -EINVAL;
108
109 ret = snd_soc_read(codec , reg);
110 if (ret < 0) {
111 memset(regbuf, 'X', regsize);
112 regbuf[regsize] = '\0';
113 } else {
114 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
115 }
116
117 /* prepare the buffer */
118 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119 /* copy it back to the caller without the '\0' */
120 memcpy(buf, tmpbuf, len);
121
122 return 0;
123}
124
125/* codec register dump */
126static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127 size_t count, loff_t pos)
128{
129 int i, step = 1;
130 int wordsize, regsize;
131 int len;
132 size_t total = 0;
133 loff_t p = 0;
134
135 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136 regsize = codec->driver->reg_word_size * 2;
137
138 len = wordsize + regsize + 2 + 1;
139
140 if (!codec->driver->reg_cache_size)
141 return 0;
142
143 if (codec->driver->reg_cache_step)
144 step = codec->driver->reg_cache_step;
145
146 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147 if (codec->readable_register && !codec->readable_register(codec, i))
148 continue;
149 if (codec->driver->display_register) {
150 count += codec->driver->display_register(codec, buf + count,
151 PAGE_SIZE - count, i);
152 } else {
153 /* only support larger than PAGE_SIZE bytes debugfs
154 * entries for the default case */
155 if (p >= pos) {
156 if (total + len >= count - 1)
157 break;
158 format_register_str(codec, i, buf + total, len);
159 total += len;
160 }
161 p += len;
162 }
163 }
164
165 total = min(total, count - 1);
166
167 return total;
168}
169
170static ssize_t codec_reg_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
172{
173 struct snd_soc_pcm_runtime *rtd =
174 container_of(dev, struct snd_soc_pcm_runtime, dev);
175
176 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177}
178
179static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
180
181static ssize_t pmdown_time_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 struct snd_soc_pcm_runtime *rtd =
185 container_of(dev, struct snd_soc_pcm_runtime, dev);
186
187 return sprintf(buf, "%ld\n", rtd->pmdown_time);
188}
189
190static ssize_t pmdown_time_set(struct device *dev,
191 struct device_attribute *attr,
192 const char *buf, size_t count)
193{
194 struct snd_soc_pcm_runtime *rtd =
195 container_of(dev, struct snd_soc_pcm_runtime, dev);
196 int ret;
197
198 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
199 if (ret)
200 return ret;
201
202 return count;
203}
204
205static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206
207#ifdef CONFIG_DEBUG_FS
208static int codec_reg_open_file(struct inode *inode, struct file *file)
209{
210 file->private_data = inode->i_private;
211 return 0;
212}
213
214static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215 size_t count, loff_t *ppos)
216{
217 ssize_t ret;
218 struct snd_soc_codec *codec = file->private_data;
219 char *buf;
220
221 if (*ppos < 0 || !count)
222 return -EINVAL;
223
224 buf = kmalloc(count, GFP_KERNEL);
225 if (!buf)
226 return -ENOMEM;
227
228 ret = soc_codec_reg_show(codec, buf, count, *ppos);
229 if (ret >= 0) {
230 if (copy_to_user(user_buf, buf, ret)) {
231 kfree(buf);
232 return -EFAULT;
233 }
234 *ppos += ret;
235 }
236
237 kfree(buf);
238 return ret;
239}
240
241static ssize_t codec_reg_write_file(struct file *file,
242 const char __user *user_buf, size_t count, loff_t *ppos)
243{
244 char buf[32];
245 size_t buf_size;
246 char *start = buf;
247 unsigned long reg, value;
248 int step = 1;
249 struct snd_soc_codec *codec = file->private_data;
250
251 buf_size = min(count, (sizeof(buf)-1));
252 if (copy_from_user(buf, user_buf, buf_size))
253 return -EFAULT;
254 buf[buf_size] = 0;
255
256 if (codec->driver->reg_cache_step)
257 step = codec->driver->reg_cache_step;
258
259 while (*start == ' ')
260 start++;
261 reg = simple_strtoul(start, &start, 16);
262 while (*start == ' ')
263 start++;
264 if (strict_strtoul(start, 16, &value))
265 return -EINVAL;
266
267 /* Userspace has been fiddling around behind the kernel's back */
268 add_taint(TAINT_USER);
269
270 snd_soc_write(codec, reg, value);
271 return buf_size;
272}
273
274static const struct file_operations codec_reg_fops = {
275 .open = codec_reg_open_file,
276 .read = codec_reg_read_file,
277 .write = codec_reg_write_file,
278 .llseek = default_llseek,
279};
280
281static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282{
283 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284
285 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286 debugfs_card_root);
287 if (!codec->debugfs_codec_root) {
288 printk(KERN_WARNING
289 "ASoC: Failed to create codec debugfs directory\n");
290 return;
291 }
292
293 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294 &codec->cache_sync);
295 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
296 &codec->cache_only);
297
298 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299 codec->debugfs_codec_root,
300 codec, &codec_reg_fops);
301 if (!codec->debugfs_reg)
302 printk(KERN_WARNING
303 "ASoC: Failed to create codec register debugfs file\n");
304
305 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
306}
307
308static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309{
310 debugfs_remove_recursive(codec->debugfs_codec_root);
311}
312
313static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
314 size_t count, loff_t *ppos)
315{
316 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
317 ssize_t len, ret = 0;
318 struct snd_soc_codec *codec;
319
320 if (!buf)
321 return -ENOMEM;
322
323 list_for_each_entry(codec, &codec_list, list) {
324 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
325 codec->name);
326 if (len >= 0)
327 ret += len;
328 if (ret > PAGE_SIZE) {
329 ret = PAGE_SIZE;
330 break;
331 }
332 }
333
334 if (ret >= 0)
335 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
336
337 kfree(buf);
338
339 return ret;
340}
341
342static const struct file_operations codec_list_fops = {
343 .read = codec_list_read_file,
344 .llseek = default_llseek,/* read accesses f_pos */
345};
346
347static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
348 size_t count, loff_t *ppos)
349{
350 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
351 ssize_t len, ret = 0;
352 struct snd_soc_dai *dai;
353
354 if (!buf)
355 return -ENOMEM;
356
357 list_for_each_entry(dai, &dai_list, list) {
358 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
359 if (len >= 0)
360 ret += len;
361 if (ret > PAGE_SIZE) {
362 ret = PAGE_SIZE;
363 break;
364 }
365 }
366
367 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
368
369 kfree(buf);
370
371 return ret;
372}
373
374static const struct file_operations dai_list_fops = {
375 .read = dai_list_read_file,
376 .llseek = default_llseek,/* read accesses f_pos */
377};
378
379static ssize_t platform_list_read_file(struct file *file,
380 char __user *user_buf,
381 size_t count, loff_t *ppos)
382{
383 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
384 ssize_t len, ret = 0;
385 struct snd_soc_platform *platform;
386
387 if (!buf)
388 return -ENOMEM;
389
390 list_for_each_entry(platform, &platform_list, list) {
391 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
392 platform->name);
393 if (len >= 0)
394 ret += len;
395 if (ret > PAGE_SIZE) {
396 ret = PAGE_SIZE;
397 break;
398 }
399 }
400
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403 kfree(buf);
404
405 return ret;
406}
407
408static const struct file_operations platform_list_fops = {
409 .read = platform_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
411};
412
413static void soc_init_card_debugfs(struct snd_soc_card *card)
414{
415 card->debugfs_card_root = debugfs_create_dir(card->name,
416 snd_soc_debugfs_root);
417 if (!card->debugfs_card_root) {
418 dev_warn(card->dev,
419 "ASoC: Failed to create codec debugfs directory\n");
420 return;
421 }
422
423 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
424 card->debugfs_card_root,
425 &card->pop_time);
426 if (!card->debugfs_pop_time)
427 dev_warn(card->dev,
428 "Failed to create pop time debugfs file\n");
429}
430
431static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
432{
433 debugfs_remove_recursive(card->debugfs_card_root);
434}
435
436#else
437
438static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
439{
440}
441
442static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
443{
444}
445
446static inline void soc_init_card_debugfs(struct snd_soc_card *card)
447{
448}
449
450static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
451{
452}
453#endif
454
455#ifdef CONFIG_SND_SOC_AC97_BUS
456/* unregister ac97 codec */
457static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
458{
459 if (codec->ac97->dev.bus)
460 device_unregister(&codec->ac97->dev);
461 return 0;
462}
463
464/* stop no dev release warning */
465static void soc_ac97_device_release(struct device *dev){}
466
467/* register ac97 codec to bus */
468static int soc_ac97_dev_register(struct snd_soc_codec *codec)
469{
470 int err;
471
472 codec->ac97->dev.bus = &ac97_bus_type;
473 codec->ac97->dev.parent = codec->card->dev;
474 codec->ac97->dev.release = soc_ac97_device_release;
475
476 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
477 codec->card->snd_card->number, 0, codec->name);
478 err = device_register(&codec->ac97->dev);
479 if (err < 0) {
480 snd_printk(KERN_ERR "Can't register ac97 bus\n");
481 codec->ac97->dev.bus = NULL;
482 return err;
483 }
484 return 0;
485}
486#endif
487
488#ifdef CONFIG_PM_SLEEP
489/* powers down audio subsystem for suspend */
490int snd_soc_suspend(struct device *dev)
491{
492 struct snd_soc_card *card = dev_get_drvdata(dev);
493 struct snd_soc_codec *codec;
494 int i;
495
496 /* If the initialization of this soc device failed, there is no codec
497 * associated with it. Just bail out in this case.
498 */
499 if (list_empty(&card->codec_dev_list))
500 return 0;
501
502 /* Due to the resume being scheduled into a workqueue we could
503 * suspend before that's finished - wait for it to complete.
504 */
505 snd_power_lock(card->snd_card);
506 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
507 snd_power_unlock(card->snd_card);
508
509 /* we're going to block userspace touching us until resume completes */
510 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
511
512 /* mute any active DACs */
513 for (i = 0; i < card->num_rtd; i++) {
514 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
515 struct snd_soc_dai_driver *drv = dai->driver;
516
517 if (card->rtd[i].dai_link->ignore_suspend)
518 continue;
519
520 if (drv->ops->digital_mute && dai->playback_active)
521 drv->ops->digital_mute(dai, 1);
522 }
523
524 /* suspend all pcms */
525 for (i = 0; i < card->num_rtd; i++) {
526 if (card->rtd[i].dai_link->ignore_suspend)
527 continue;
528
529 snd_pcm_suspend_all(card->rtd[i].pcm);
530 }
531
532 if (card->suspend_pre)
533 card->suspend_pre(card);
534
535 for (i = 0; i < card->num_rtd; i++) {
536 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
537 struct snd_soc_platform *platform = card->rtd[i].platform;
538
539 if (card->rtd[i].dai_link->ignore_suspend)
540 continue;
541
542 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
543 cpu_dai->driver->suspend(cpu_dai);
544 if (platform->driver->suspend && !platform->suspended) {
545 platform->driver->suspend(cpu_dai);
546 platform->suspended = 1;
547 }
548 }
549
550 /* close any waiting streams and save state */
551 for (i = 0; i < card->num_rtd; i++) {
552 flush_delayed_work_sync(&card->rtd[i].delayed_work);
553 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
554 }
555
556 for (i = 0; i < card->num_rtd; i++) {
557 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
558
559 if (card->rtd[i].dai_link->ignore_suspend)
560 continue;
561
562 if (driver->playback.stream_name != NULL)
563 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
564 SND_SOC_DAPM_STREAM_SUSPEND);
565
566 if (driver->capture.stream_name != NULL)
567 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
568 SND_SOC_DAPM_STREAM_SUSPEND);
569 }
570
571 /* suspend all CODECs */
572 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
573 /* If there are paths active then the CODEC will be held with
574 * bias _ON and should not be suspended. */
575 if (!codec->suspended && codec->driver->suspend) {
576 switch (codec->dapm.bias_level) {
577 case SND_SOC_BIAS_STANDBY:
578 case SND_SOC_BIAS_OFF:
579 codec->driver->suspend(codec, PMSG_SUSPEND);
580 codec->suspended = 1;
581 codec->cache_sync = 1;
582 break;
583 default:
584 dev_dbg(codec->dev, "CODEC is on over suspend\n");
585 break;
586 }
587 }
588 }
589
590 for (i = 0; i < card->num_rtd; i++) {
591 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
592
593 if (card->rtd[i].dai_link->ignore_suspend)
594 continue;
595
596 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
597 cpu_dai->driver->suspend(cpu_dai);
598 }
599
600 if (card->suspend_post)
601 card->suspend_post(card);
602
603 return 0;
604}
605EXPORT_SYMBOL_GPL(snd_soc_suspend);
606
607/* deferred resume work, so resume can complete before we finished
608 * setting our codec back up, which can be very slow on I2C
609 */
610static void soc_resume_deferred(struct work_struct *work)
611{
612 struct snd_soc_card *card =
613 container_of(work, struct snd_soc_card, deferred_resume_work);
614 struct snd_soc_codec *codec;
615 int i;
616
617 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
618 * so userspace apps are blocked from touching us
619 */
620
621 dev_dbg(card->dev, "starting resume work\n");
622
623 /* Bring us up into D2 so that DAPM starts enabling things */
624 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
625
626 if (card->resume_pre)
627 card->resume_pre(card);
628
629 /* resume AC97 DAIs */
630 for (i = 0; i < card->num_rtd; i++) {
631 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
632
633 if (card->rtd[i].dai_link->ignore_suspend)
634 continue;
635
636 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
637 cpu_dai->driver->resume(cpu_dai);
638 }
639
640 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
641 /* If the CODEC was idle over suspend then it will have been
642 * left with bias OFF or STANDBY and suspended so we must now
643 * resume. Otherwise the suspend was suppressed.
644 */
645 if (codec->driver->resume && codec->suspended) {
646 switch (codec->dapm.bias_level) {
647 case SND_SOC_BIAS_STANDBY:
648 case SND_SOC_BIAS_OFF:
649 codec->driver->resume(codec);
650 codec->suspended = 0;
651 break;
652 default:
653 dev_dbg(codec->dev, "CODEC was on over suspend\n");
654 break;
655 }
656 }
657 }
658
659 for (i = 0; i < card->num_rtd; i++) {
660 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
661
662 if (card->rtd[i].dai_link->ignore_suspend)
663 continue;
664
665 if (driver->playback.stream_name != NULL)
666 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
667 SND_SOC_DAPM_STREAM_RESUME);
668
669 if (driver->capture.stream_name != NULL)
670 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
671 SND_SOC_DAPM_STREAM_RESUME);
672 }
673
674 /* unmute any active DACs */
675 for (i = 0; i < card->num_rtd; i++) {
676 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
677 struct snd_soc_dai_driver *drv = dai->driver;
678
679 if (card->rtd[i].dai_link->ignore_suspend)
680 continue;
681
682 if (drv->ops->digital_mute && dai->playback_active)
683 drv->ops->digital_mute(dai, 0);
684 }
685
686 for (i = 0; i < card->num_rtd; i++) {
687 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
688 struct snd_soc_platform *platform = card->rtd[i].platform;
689
690 if (card->rtd[i].dai_link->ignore_suspend)
691 continue;
692
693 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
694 cpu_dai->driver->resume(cpu_dai);
695 if (platform->driver->resume && platform->suspended) {
696 platform->driver->resume(cpu_dai);
697 platform->suspended = 0;
698 }
699 }
700
701 if (card->resume_post)
702 card->resume_post(card);
703
704 dev_dbg(card->dev, "resume work completed\n");
705
706 /* userspace can access us now we are back as we were before */
707 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
708}
709
710/* powers up audio subsystem after a suspend */
711int snd_soc_resume(struct device *dev)
712{
713 struct snd_soc_card *card = dev_get_drvdata(dev);
714 int i, ac97_control = 0;
715
716 /* AC97 devices might have other drivers hanging off them so
717 * need to resume immediately. Other drivers don't have that
718 * problem and may take a substantial amount of time to resume
719 * due to I/O costs and anti-pop so handle them out of line.
720 */
721 for (i = 0; i < card->num_rtd; i++) {
722 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
723 ac97_control |= cpu_dai->driver->ac97_control;
724 }
725 if (ac97_control) {
726 dev_dbg(dev, "Resuming AC97 immediately\n");
727 soc_resume_deferred(&card->deferred_resume_work);
728 } else {
729 dev_dbg(dev, "Scheduling resume work\n");
730 if (!schedule_work(&card->deferred_resume_work))
731 dev_err(dev, "resume work item may be lost\n");
732 }
733
734 return 0;
735}
736EXPORT_SYMBOL_GPL(snd_soc_resume);
737#else
738#define snd_soc_suspend NULL
739#define snd_soc_resume NULL
740#endif
741
742static struct snd_soc_dai_ops null_dai_ops = {
743};
744
745static int soc_bind_dai_link(struct snd_soc_card *card, int num)
746{
747 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
748 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
749 struct snd_soc_codec *codec;
750 struct snd_soc_platform *platform;
751 struct snd_soc_dai *codec_dai, *cpu_dai;
752 const char *platform_name;
753
754 if (rtd->complete)
755 return 1;
756 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
757
758 /* do we already have the CPU DAI for this link ? */
759 if (rtd->cpu_dai) {
760 goto find_codec;
761 }
762 /* no, then find CPU DAI from registered DAIs*/
763 list_for_each_entry(cpu_dai, &dai_list, list) {
764 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
765 rtd->cpu_dai = cpu_dai;
766 goto find_codec;
767 }
768 }
769 dev_dbg(card->dev, "CPU DAI %s not registered\n",
770 dai_link->cpu_dai_name);
771
772find_codec:
773 /* do we already have the CODEC for this link ? */
774 if (rtd->codec) {
775 goto find_platform;
776 }
777
778 /* no, then find CODEC from registered CODECs*/
779 list_for_each_entry(codec, &codec_list, list) {
780 if (!strcmp(codec->name, dai_link->codec_name)) {
781 rtd->codec = codec;
782
783 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
784 list_for_each_entry(codec_dai, &dai_list, list) {
785 if (codec->dev == codec_dai->dev &&
786 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
787 rtd->codec_dai = codec_dai;
788 goto find_platform;
789 }
790 }
791 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
792 dai_link->codec_dai_name);
793
794 goto find_platform;
795 }
796 }
797 dev_dbg(card->dev, "CODEC %s not registered\n",
798 dai_link->codec_name);
799
800find_platform:
801 /* do we need a platform? */
802 if (rtd->platform)
803 goto out;
804
805 /* if there's no platform we match on the empty platform */
806 platform_name = dai_link->platform_name;
807 if (!platform_name)
808 platform_name = "snd-soc-dummy";
809
810 /* no, then find one from the set of registered platforms */
811 list_for_each_entry(platform, &platform_list, list) {
812 if (!strcmp(platform->name, platform_name)) {
813 rtd->platform = platform;
814 goto out;
815 }
816 }
817
818 dev_dbg(card->dev, "platform %s not registered\n",
819 dai_link->platform_name);
820 return 0;
821
822out:
823 /* mark rtd as complete if we found all 4 of our client devices */
824 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
825 rtd->complete = 1;
826 card->num_rtd++;
827 }
828 return 1;
829}
830
831static void soc_remove_codec(struct snd_soc_codec *codec)
832{
833 int err;
834
835 if (codec->driver->remove) {
836 err = codec->driver->remove(codec);
837 if (err < 0)
838 dev_err(codec->dev,
839 "asoc: failed to remove %s: %d\n",
840 codec->name, err);
841 }
842
843 /* Make sure all DAPM widgets are freed */
844 snd_soc_dapm_free(&codec->dapm);
845
846 soc_cleanup_codec_debugfs(codec);
847 codec->probed = 0;
848 list_del(&codec->card_list);
849 module_put(codec->dev->driver->owner);
850}
851
852static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
853{
854 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
855 struct snd_soc_codec *codec = rtd->codec;
856 struct snd_soc_platform *platform = rtd->platform;
857 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
858 int err;
859
860 /* unregister the rtd device */
861 if (rtd->dev_registered) {
862 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
863 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
864 device_unregister(&rtd->dev);
865 rtd->dev_registered = 0;
866 }
867
868 /* remove the CODEC DAI */
869 if (codec_dai && codec_dai->probed &&
870 codec_dai->driver->remove_order == order) {
871 if (codec_dai->driver->remove) {
872 err = codec_dai->driver->remove(codec_dai);
873 if (err < 0)
874 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
875 }
876 codec_dai->probed = 0;
877 list_del(&codec_dai->card_list);
878 }
879
880 /* remove the platform */
881 if (platform && platform->probed &&
882 platform->driver->remove_order == order) {
883 if (platform->driver->remove) {
884 err = platform->driver->remove(platform);
885 if (err < 0)
886 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
887 }
888 platform->probed = 0;
889 list_del(&platform->card_list);
890 module_put(platform->dev->driver->owner);
891 }
892
893 /* remove the CODEC */
894 if (codec && codec->probed &&
895 codec->driver->remove_order == order)
896 soc_remove_codec(codec);
897
898 /* remove the cpu_dai */
899 if (cpu_dai && cpu_dai->probed &&
900 cpu_dai->driver->remove_order == order) {
901 if (cpu_dai->driver->remove) {
902 err = cpu_dai->driver->remove(cpu_dai);
903 if (err < 0)
904 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
905 }
906 cpu_dai->probed = 0;
907 list_del(&cpu_dai->card_list);
908 module_put(cpu_dai->dev->driver->owner);
909 }
910}
911
912static void soc_remove_dai_links(struct snd_soc_card *card)
913{
914 int dai, order;
915
916 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
917 order++) {
918 for (dai = 0; dai < card->num_rtd; dai++)
919 soc_remove_dai_link(card, dai, order);
920 }
921 card->num_rtd = 0;
922}
923
924static void soc_set_name_prefix(struct snd_soc_card *card,
925 struct snd_soc_codec *codec)
926{
927 int i;
928
929 if (card->codec_conf == NULL)
930 return;
931
932 for (i = 0; i < card->num_configs; i++) {
933 struct snd_soc_codec_conf *map = &card->codec_conf[i];
934 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
935 codec->name_prefix = map->name_prefix;
936 break;
937 }
938 }
939}
940
941static int soc_probe_codec(struct snd_soc_card *card,
942 struct snd_soc_codec *codec)
943{
944 int ret = 0;
945 const struct snd_soc_codec_driver *driver = codec->driver;
946
947 codec->card = card;
948 codec->dapm.card = card;
949 soc_set_name_prefix(card, codec);
950
951 if (!try_module_get(codec->dev->driver->owner))
952 return -ENODEV;
953
954 soc_init_codec_debugfs(codec);
955
956 if (driver->dapm_widgets)
957 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
958 driver->num_dapm_widgets);
959
960 if (driver->probe) {
961 ret = driver->probe(codec);
962 if (ret < 0) {
963 dev_err(codec->dev,
964 "asoc: failed to probe CODEC %s: %d\n",
965 codec->name, ret);
966 goto err_probe;
967 }
968 }
969
970 if (driver->controls)
971 snd_soc_add_controls(codec, driver->controls,
972 driver->num_controls);
973 if (driver->dapm_routes)
974 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
975 driver->num_dapm_routes);
976
977 /* mark codec as probed and add to card codec list */
978 codec->probed = 1;
979 list_add(&codec->card_list, &card->codec_dev_list);
980 list_add(&codec->dapm.list, &card->dapm_list);
981
982 return 0;
983
984err_probe:
985 soc_cleanup_codec_debugfs(codec);
986 module_put(codec->dev->driver->owner);
987
988 return ret;
989}
990
991static int soc_probe_platform(struct snd_soc_card *card,
992 struct snd_soc_platform *platform)
993{
994 int ret = 0;
995 const struct snd_soc_platform_driver *driver = platform->driver;
996
997 platform->card = card;
998 platform->dapm.card = card;
999
1000 if (!try_module_get(platform->dev->driver->owner))
1001 return -ENODEV;
1002
1003 if (driver->dapm_widgets)
1004 snd_soc_dapm_new_controls(&platform->dapm,
1005 driver->dapm_widgets, driver->num_dapm_widgets);
1006
1007 if (driver->probe) {
1008 ret = driver->probe(platform);
1009 if (ret < 0) {
1010 dev_err(platform->dev,
1011 "asoc: failed to probe platform %s: %d\n",
1012 platform->name, ret);
1013 goto err_probe;
1014 }
1015 }
1016
1017 if (driver->controls)
1018 snd_soc_add_platform_controls(platform, driver->controls,
1019 driver->num_controls);
1020 if (driver->dapm_routes)
1021 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1022 driver->num_dapm_routes);
1023
1024 /* mark platform as probed and add to card platform list */
1025 platform->probed = 1;
1026 list_add(&platform->card_list, &card->platform_dev_list);
1027 list_add(&platform->dapm.list, &card->dapm_list);
1028
1029 return 0;
1030
1031err_probe:
1032 module_put(platform->dev->driver->owner);
1033
1034 return ret;
1035}
1036
1037static void rtd_release(struct device *dev) {}
1038
1039static int soc_post_component_init(struct snd_soc_card *card,
1040 struct snd_soc_codec *codec,
1041 int num, int dailess)
1042{
1043 struct snd_soc_dai_link *dai_link = NULL;
1044 struct snd_soc_aux_dev *aux_dev = NULL;
1045 struct snd_soc_pcm_runtime *rtd;
1046 const char *temp, *name;
1047 int ret = 0;
1048
1049 if (!dailess) {
1050 dai_link = &card->dai_link[num];
1051 rtd = &card->rtd[num];
1052 name = dai_link->name;
1053 } else {
1054 aux_dev = &card->aux_dev[num];
1055 rtd = &card->rtd_aux[num];
1056 name = aux_dev->name;
1057 }
1058 rtd->card = card;
1059
1060 /* machine controls, routes and widgets are not prefixed */
1061 temp = codec->name_prefix;
1062 codec->name_prefix = NULL;
1063
1064 /* do machine specific initialization */
1065 if (!dailess && dai_link->init)
1066 ret = dai_link->init(rtd);
1067 else if (dailess && aux_dev->init)
1068 ret = aux_dev->init(&codec->dapm);
1069 if (ret < 0) {
1070 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1071 return ret;
1072 }
1073 codec->name_prefix = temp;
1074
1075 /* Make sure all DAPM widgets are instantiated */
1076 snd_soc_dapm_new_widgets(&codec->dapm);
1077
1078 /* register the rtd device */
1079 rtd->codec = codec;
1080 rtd->dev.parent = card->dev;
1081 rtd->dev.release = rtd_release;
1082 rtd->dev.init_name = name;
1083 mutex_init(&rtd->pcm_mutex);
1084 ret = device_register(&rtd->dev);
1085 if (ret < 0) {
1086 dev_err(card->dev,
1087 "asoc: failed to register runtime device: %d\n", ret);
1088 return ret;
1089 }
1090 rtd->dev_registered = 1;
1091
1092 /* add DAPM sysfs entries for this codec */
1093 ret = snd_soc_dapm_sys_add(&rtd->dev);
1094 if (ret < 0)
1095 dev_err(codec->dev,
1096 "asoc: failed to add codec dapm sysfs entries: %d\n",
1097 ret);
1098
1099 /* add codec sysfs entries */
1100 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1101 if (ret < 0)
1102 dev_err(codec->dev,
1103 "asoc: failed to add codec sysfs files: %d\n", ret);
1104
1105 return 0;
1106}
1107
1108static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order)
1109{
1110 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1111 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1112 struct snd_soc_codec *codec = rtd->codec;
1113 struct snd_soc_platform *platform = rtd->platform;
1114 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1115 int ret;
1116
1117 dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1118 card->name, num, order);
1119
1120 /* config components */
1121 codec_dai->codec = codec;
1122 cpu_dai->platform = platform;
1123 codec_dai->card = card;
1124 cpu_dai->card = card;
1125
1126 /* set default power off timeout */
1127 rtd->pmdown_time = pmdown_time;
1128
1129 /* probe the cpu_dai */
1130 if (!cpu_dai->probed &&
1131 cpu_dai->driver->probe_order == order) {
1132 if (!try_module_get(cpu_dai->dev->driver->owner))
1133 return -ENODEV;
1134
1135 if (cpu_dai->driver->probe) {
1136 ret = cpu_dai->driver->probe(cpu_dai);
1137 if (ret < 0) {
1138 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1139 cpu_dai->name);
1140 module_put(cpu_dai->dev->driver->owner);
1141 return ret;
1142 }
1143 }
1144 cpu_dai->probed = 1;
1145 /* mark cpu_dai as probed and add to card dai list */
1146 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1147 }
1148
1149 /* probe the CODEC */
1150 if (!codec->probed &&
1151 codec->driver->probe_order == order) {
1152 ret = soc_probe_codec(card, codec);
1153 if (ret < 0)
1154 return ret;
1155 }
1156
1157 /* probe the platform */
1158 if (!platform->probed &&
1159 platform->driver->probe_order == order) {
1160 ret = soc_probe_platform(card, platform);
1161 if (ret < 0)
1162 return ret;
1163 }
1164
1165 /* probe the CODEC DAI */
1166 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1167 if (codec_dai->driver->probe) {
1168 ret = codec_dai->driver->probe(codec_dai);
1169 if (ret < 0) {
1170 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1171 codec_dai->name);
1172 return ret;
1173 }
1174 }
1175
1176 /* mark codec_dai as probed and add to card dai list */
1177 codec_dai->probed = 1;
1178 list_add(&codec_dai->card_list, &card->dai_dev_list);
1179 }
1180
1181 /* complete DAI probe during last probe */
1182 if (order != SND_SOC_COMP_ORDER_LAST)
1183 return 0;
1184
1185 ret = soc_post_component_init(card, codec, num, 0);
1186 if (ret)
1187 return ret;
1188
1189 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1190 if (ret < 0)
1191 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1192
1193 /* create the pcm */
1194 ret = soc_new_pcm(rtd, num);
1195 if (ret < 0) {
1196 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1197 return ret;
1198 }
1199
1200 /* add platform data for AC97 devices */
1201 if (rtd->codec_dai->driver->ac97_control)
1202 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1203
1204 return 0;
1205}
1206
1207#ifdef CONFIG_SND_SOC_AC97_BUS
1208static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1209{
1210 int ret;
1211
1212 /* Only instantiate AC97 if not already done by the adaptor
1213 * for the generic AC97 subsystem.
1214 */
1215 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1216 /*
1217 * It is possible that the AC97 device is already registered to
1218 * the device subsystem. This happens when the device is created
1219 * via snd_ac97_mixer(). Currently only SoC codec that does so
1220 * is the generic AC97 glue but others migh emerge.
1221 *
1222 * In those cases we don't try to register the device again.
1223 */
1224 if (!rtd->codec->ac97_created)
1225 return 0;
1226
1227 ret = soc_ac97_dev_register(rtd->codec);
1228 if (ret < 0) {
1229 printk(KERN_ERR "asoc: AC97 device register failed\n");
1230 return ret;
1231 }
1232
1233 rtd->codec->ac97_registered = 1;
1234 }
1235 return 0;
1236}
1237
1238static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1239{
1240 if (codec->ac97_registered) {
1241 soc_ac97_dev_unregister(codec);
1242 codec->ac97_registered = 0;
1243 }
1244}
1245#endif
1246
1247static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1248{
1249 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1250 struct snd_soc_codec *codec;
1251 int ret = -ENODEV;
1252
1253 /* find CODEC from registered CODECs*/
1254 list_for_each_entry(codec, &codec_list, list) {
1255 if (!strcmp(codec->name, aux_dev->codec_name)) {
1256 if (codec->probed) {
1257 dev_err(codec->dev,
1258 "asoc: codec already probed");
1259 ret = -EBUSY;
1260 goto out;
1261 }
1262 goto found;
1263 }
1264 }
1265 /* codec not found */
1266 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1267 goto out;
1268
1269found:
1270 ret = soc_probe_codec(card, codec);
1271 if (ret < 0)
1272 return ret;
1273
1274 ret = soc_post_component_init(card, codec, num, 1);
1275
1276out:
1277 return ret;
1278}
1279
1280static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1281{
1282 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1283 struct snd_soc_codec *codec = rtd->codec;
1284
1285 /* unregister the rtd device */
1286 if (rtd->dev_registered) {
1287 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1288 device_unregister(&rtd->dev);
1289 rtd->dev_registered = 0;
1290 }
1291
1292 if (codec && codec->probed)
1293 soc_remove_codec(codec);
1294}
1295
1296static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1297 enum snd_soc_compress_type compress_type)
1298{
1299 int ret;
1300
1301 if (codec->cache_init)
1302 return 0;
1303
1304 /* override the compress_type if necessary */
1305 if (compress_type && codec->compress_type != compress_type)
1306 codec->compress_type = compress_type;
1307 ret = snd_soc_cache_init(codec);
1308 if (ret < 0) {
1309 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1310 ret);
1311 return ret;
1312 }
1313 codec->cache_init = 1;
1314 return 0;
1315}
1316
1317static void snd_soc_instantiate_card(struct snd_soc_card *card)
1318{
1319 struct snd_soc_codec *codec;
1320 struct snd_soc_codec_conf *codec_conf;
1321 enum snd_soc_compress_type compress_type;
1322 int ret, i, order;
1323
1324 mutex_lock(&card->mutex);
1325
1326 if (card->instantiated) {
1327 mutex_unlock(&card->mutex);
1328 return;
1329 }
1330
1331 /* bind DAIs */
1332 for (i = 0; i < card->num_links; i++)
1333 soc_bind_dai_link(card, i);
1334
1335 /* bind completed ? */
1336 if (card->num_rtd != card->num_links) {
1337 mutex_unlock(&card->mutex);
1338 return;
1339 }
1340
1341 /* initialize the register cache for each available codec */
1342 list_for_each_entry(codec, &codec_list, list) {
1343 if (codec->cache_init)
1344 continue;
1345 /* by default we don't override the compress_type */
1346 compress_type = 0;
1347 /* check to see if we need to override the compress_type */
1348 for (i = 0; i < card->num_configs; ++i) {
1349 codec_conf = &card->codec_conf[i];
1350 if (!strcmp(codec->name, codec_conf->dev_name)) {
1351 compress_type = codec_conf->compress_type;
1352 if (compress_type && compress_type
1353 != codec->compress_type)
1354 break;
1355 }
1356 }
1357 ret = snd_soc_init_codec_cache(codec, compress_type);
1358 if (ret < 0) {
1359 mutex_unlock(&card->mutex);
1360 return;
1361 }
1362 }
1363
1364 /* card bind complete so register a sound card */
1365 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1366 card->owner, 0, &card->snd_card);
1367 if (ret < 0) {
1368 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1369 card->name);
1370 mutex_unlock(&card->mutex);
1371 return;
1372 }
1373 card->snd_card->dev = card->dev;
1374
1375 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1376 card->dapm.dev = card->dev;
1377 card->dapm.card = card;
1378 list_add(&card->dapm.list, &card->dapm_list);
1379
1380#ifdef CONFIG_DEBUG_FS
1381 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1382#endif
1383
1384#ifdef CONFIG_PM_SLEEP
1385 /* deferred resume work */
1386 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1387#endif
1388
1389 if (card->dapm_widgets)
1390 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1391 card->num_dapm_widgets);
1392
1393 /* initialise the sound card only once */
1394 if (card->probe) {
1395 ret = card->probe(card);
1396 if (ret < 0)
1397 goto card_probe_error;
1398 }
1399
1400 /* early DAI link probe */
1401 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1402 order++) {
1403 for (i = 0; i < card->num_links; i++) {
1404 ret = soc_probe_dai_link(card, i, order);
1405 if (ret < 0) {
1406 pr_err("asoc: failed to instantiate card %s: %d\n",
1407 card->name, ret);
1408 goto probe_dai_err;
1409 }
1410 }
1411 }
1412
1413 for (i = 0; i < card->num_aux_devs; i++) {
1414 ret = soc_probe_aux_dev(card, i);
1415 if (ret < 0) {
1416 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1417 card->name, ret);
1418 goto probe_aux_dev_err;
1419 }
1420 }
1421
1422 /* We should have a non-codec control add function but we don't */
1423 if (card->controls)
1424 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1425 struct snd_soc_codec,
1426 card_list),
1427 card->controls,
1428 card->num_controls);
1429
1430 if (card->dapm_routes)
1431 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1432 card->num_dapm_routes);
1433
1434 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1435 "%s", card->name);
1436 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1437 "%s", card->long_name ? card->long_name : card->name);
1438 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1439 "%s", card->driver_name ? card->driver_name : card->name);
1440 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1441 switch (card->snd_card->driver[i]) {
1442 case '_':
1443 case '-':
1444 case '\0':
1445 break;
1446 default:
1447 if (!isalnum(card->snd_card->driver[i]))
1448 card->snd_card->driver[i] = '_';
1449 break;
1450 }
1451 }
1452
1453 if (card->late_probe) {
1454 ret = card->late_probe(card);
1455 if (ret < 0) {
1456 dev_err(card->dev, "%s late_probe() failed: %d\n",
1457 card->name, ret);
1458 goto probe_aux_dev_err;
1459 }
1460 }
1461
1462 ret = snd_card_register(card->snd_card);
1463 if (ret < 0) {
1464 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1465 goto probe_aux_dev_err;
1466 }
1467
1468#ifdef CONFIG_SND_SOC_AC97_BUS
1469 /* register any AC97 codecs */
1470 for (i = 0; i < card->num_rtd; i++) {
1471 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1472 if (ret < 0) {
1473 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1474 while (--i >= 0)
1475 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1476 goto probe_aux_dev_err;
1477 }
1478 }
1479#endif
1480
1481 card->instantiated = 1;
1482 mutex_unlock(&card->mutex);
1483 return;
1484
1485probe_aux_dev_err:
1486 for (i = 0; i < card->num_aux_devs; i++)
1487 soc_remove_aux_dev(card, i);
1488
1489probe_dai_err:
1490 soc_remove_dai_links(card);
1491
1492card_probe_error:
1493 if (card->remove)
1494 card->remove(card);
1495
1496 snd_card_free(card->snd_card);
1497
1498 mutex_unlock(&card->mutex);
1499}
1500
1501/*
1502 * Attempt to initialise any uninitialised cards. Must be called with
1503 * client_mutex.
1504 */
1505static void snd_soc_instantiate_cards(void)
1506{
1507 struct snd_soc_card *card;
1508 list_for_each_entry(card, &card_list, list)
1509 snd_soc_instantiate_card(card);
1510}
1511
1512/* probes a new socdev */
1513static int soc_probe(struct platform_device *pdev)
1514{
1515 struct snd_soc_card *card = platform_get_drvdata(pdev);
1516 int ret = 0;
1517
1518 /*
1519 * no card, so machine driver should be registering card
1520 * we should not be here in that case so ret error
1521 */
1522 if (!card)
1523 return -EINVAL;
1524
1525 /* Bodge while we unpick instantiation */
1526 card->dev = &pdev->dev;
1527
1528 ret = snd_soc_register_card(card);
1529 if (ret != 0) {
1530 dev_err(&pdev->dev, "Failed to register card\n");
1531 return ret;
1532 }
1533
1534 return 0;
1535}
1536
1537static int soc_cleanup_card_resources(struct snd_soc_card *card)
1538{
1539 int i;
1540
1541 /* make sure any delayed work runs */
1542 for (i = 0; i < card->num_rtd; i++) {
1543 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1544 flush_delayed_work_sync(&rtd->delayed_work);
1545 }
1546
1547 /* remove auxiliary devices */
1548 for (i = 0; i < card->num_aux_devs; i++)
1549 soc_remove_aux_dev(card, i);
1550
1551 /* remove and free each DAI */
1552 soc_remove_dai_links(card);
1553
1554 soc_cleanup_card_debugfs(card);
1555
1556 /* remove the card */
1557 if (card->remove)
1558 card->remove(card);
1559
1560 snd_soc_dapm_free(&card->dapm);
1561
1562 kfree(card->rtd);
1563 snd_card_free(card->snd_card);
1564 return 0;
1565
1566}
1567
1568/* removes a socdev */
1569static int soc_remove(struct platform_device *pdev)
1570{
1571 struct snd_soc_card *card = platform_get_drvdata(pdev);
1572
1573 snd_soc_unregister_card(card);
1574 return 0;
1575}
1576
1577int snd_soc_poweroff(struct device *dev)
1578{
1579 struct snd_soc_card *card = dev_get_drvdata(dev);
1580 int i;
1581
1582 if (!card->instantiated)
1583 return 0;
1584
1585 /* Flush out pmdown_time work - we actually do want to run it
1586 * now, we're shutting down so no imminent restart. */
1587 for (i = 0; i < card->num_rtd; i++) {
1588 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1589 flush_delayed_work_sync(&rtd->delayed_work);
1590 }
1591
1592 snd_soc_dapm_shutdown(card);
1593
1594 return 0;
1595}
1596EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1597
1598const struct dev_pm_ops snd_soc_pm_ops = {
1599 .suspend = snd_soc_suspend,
1600 .resume = snd_soc_resume,
1601 .poweroff = snd_soc_poweroff,
1602};
1603EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1604
1605/* ASoC platform driver */
1606static struct platform_driver soc_driver = {
1607 .driver = {
1608 .name = "soc-audio",
1609 .owner = THIS_MODULE,
1610 .pm = &snd_soc_pm_ops,
1611 },
1612 .probe = soc_probe,
1613 .remove = soc_remove,
1614};
1615
1616/**
1617 * snd_soc_codec_volatile_register: Report if a register is volatile.
1618 *
1619 * @codec: CODEC to query.
1620 * @reg: Register to query.
1621 *
1622 * Boolean function indiciating if a CODEC register is volatile.
1623 */
1624int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1625 unsigned int reg)
1626{
1627 if (codec->volatile_register)
1628 return codec->volatile_register(codec, reg);
1629 else
1630 return 0;
1631}
1632EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1633
1634/**
1635 * snd_soc_codec_readable_register: Report if a register is readable.
1636 *
1637 * @codec: CODEC to query.
1638 * @reg: Register to query.
1639 *
1640 * Boolean function indicating if a CODEC register is readable.
1641 */
1642int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1643 unsigned int reg)
1644{
1645 if (codec->readable_register)
1646 return codec->readable_register(codec, reg);
1647 else
1648 return 1;
1649}
1650EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1651
1652/**
1653 * snd_soc_codec_writable_register: Report if a register is writable.
1654 *
1655 * @codec: CODEC to query.
1656 * @reg: Register to query.
1657 *
1658 * Boolean function indicating if a CODEC register is writable.
1659 */
1660int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1661 unsigned int reg)
1662{
1663 if (codec->writable_register)
1664 return codec->writable_register(codec, reg);
1665 else
1666 return 1;
1667}
1668EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1669
1670int snd_soc_platform_read(struct snd_soc_platform *platform,
1671 unsigned int reg)
1672{
1673 unsigned int ret;
1674
1675 if (!platform->driver->read) {
1676 dev_err(platform->dev, "platform has no read back\n");
1677 return -1;
1678 }
1679
1680 ret = platform->driver->read(platform, reg);
1681 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
1682 trace_snd_soc_preg_read(platform, reg, ret);
1683
1684 return ret;
1685}
1686EXPORT_SYMBOL_GPL(snd_soc_platform_read);
1687
1688int snd_soc_platform_write(struct snd_soc_platform *platform,
1689 unsigned int reg, unsigned int val)
1690{
1691 if (!platform->driver->write) {
1692 dev_err(platform->dev, "platform has no write back\n");
1693 return -1;
1694 }
1695
1696 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
1697 trace_snd_soc_preg_write(platform, reg, val);
1698 return platform->driver->write(platform, reg, val);
1699}
1700EXPORT_SYMBOL_GPL(snd_soc_platform_write);
1701
1702/**
1703 * snd_soc_new_ac97_codec - initailise AC97 device
1704 * @codec: audio codec
1705 * @ops: AC97 bus operations
1706 * @num: AC97 codec number
1707 *
1708 * Initialises AC97 codec resources for use by ad-hoc devices only.
1709 */
1710int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1711 struct snd_ac97_bus_ops *ops, int num)
1712{
1713 mutex_lock(&codec->mutex);
1714
1715 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1716 if (codec->ac97 == NULL) {
1717 mutex_unlock(&codec->mutex);
1718 return -ENOMEM;
1719 }
1720
1721 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1722 if (codec->ac97->bus == NULL) {
1723 kfree(codec->ac97);
1724 codec->ac97 = NULL;
1725 mutex_unlock(&codec->mutex);
1726 return -ENOMEM;
1727 }
1728
1729 codec->ac97->bus->ops = ops;
1730 codec->ac97->num = num;
1731
1732 /*
1733 * Mark the AC97 device to be created by us. This way we ensure that the
1734 * device will be registered with the device subsystem later on.
1735 */
1736 codec->ac97_created = 1;
1737
1738 mutex_unlock(&codec->mutex);
1739 return 0;
1740}
1741EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1742
1743/**
1744 * snd_soc_free_ac97_codec - free AC97 codec device
1745 * @codec: audio codec
1746 *
1747 * Frees AC97 codec device resources.
1748 */
1749void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1750{
1751 mutex_lock(&codec->mutex);
1752#ifdef CONFIG_SND_SOC_AC97_BUS
1753 soc_unregister_ac97_dai_link(codec);
1754#endif
1755 kfree(codec->ac97->bus);
1756 kfree(codec->ac97);
1757 codec->ac97 = NULL;
1758 codec->ac97_created = 0;
1759 mutex_unlock(&codec->mutex);
1760}
1761EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1762
1763unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
1764{
1765 unsigned int ret;
1766
1767 ret = codec->read(codec, reg);
1768 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1769 trace_snd_soc_reg_read(codec, reg, ret);
1770
1771 return ret;
1772}
1773EXPORT_SYMBOL_GPL(snd_soc_read);
1774
1775unsigned int snd_soc_write(struct snd_soc_codec *codec,
1776 unsigned int reg, unsigned int val)
1777{
1778 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
1779 trace_snd_soc_reg_write(codec, reg, val);
1780 return codec->write(codec, reg, val);
1781}
1782EXPORT_SYMBOL_GPL(snd_soc_write);
1783
1784unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
1785 unsigned int reg, const void *data, size_t len)
1786{
1787 return codec->bulk_write_raw(codec, reg, data, len);
1788}
1789EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
1790
1791/**
1792 * snd_soc_update_bits - update codec register bits
1793 * @codec: audio codec
1794 * @reg: codec register
1795 * @mask: register mask
1796 * @value: new value
1797 *
1798 * Writes new register value.
1799 *
1800 * Returns 1 for change, 0 for no change, or negative error code.
1801 */
1802int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1803 unsigned int mask, unsigned int value)
1804{
1805 int change;
1806 unsigned int old, new;
1807 int ret;
1808
1809 ret = snd_soc_read(codec, reg);
1810 if (ret < 0)
1811 return ret;
1812
1813 old = ret;
1814 new = (old & ~mask) | (value & mask);
1815 change = old != new;
1816 if (change) {
1817 ret = snd_soc_write(codec, reg, new);
1818 if (ret < 0)
1819 return ret;
1820 }
1821
1822 return change;
1823}
1824EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1825
1826/**
1827 * snd_soc_update_bits_locked - update codec register bits
1828 * @codec: audio codec
1829 * @reg: codec register
1830 * @mask: register mask
1831 * @value: new value
1832 *
1833 * Writes new register value, and takes the codec mutex.
1834 *
1835 * Returns 1 for change else 0.
1836 */
1837int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1838 unsigned short reg, unsigned int mask,
1839 unsigned int value)
1840{
1841 int change;
1842
1843 mutex_lock(&codec->mutex);
1844 change = snd_soc_update_bits(codec, reg, mask, value);
1845 mutex_unlock(&codec->mutex);
1846
1847 return change;
1848}
1849EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1850
1851/**
1852 * snd_soc_test_bits - test register for change
1853 * @codec: audio codec
1854 * @reg: codec register
1855 * @mask: register mask
1856 * @value: new value
1857 *
1858 * Tests a register with a new value and checks if the new value is
1859 * different from the old value.
1860 *
1861 * Returns 1 for change else 0.
1862 */
1863int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1864 unsigned int mask, unsigned int value)
1865{
1866 int change;
1867 unsigned int old, new;
1868
1869 old = snd_soc_read(codec, reg);
1870 new = (old & ~mask) | value;
1871 change = old != new;
1872
1873 return change;
1874}
1875EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1876
1877/**
1878 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1879 * @substream: the pcm substream
1880 * @hw: the hardware parameters
1881 *
1882 * Sets the substream runtime hardware parameters.
1883 */
1884int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1885 const struct snd_pcm_hardware *hw)
1886{
1887 struct snd_pcm_runtime *runtime = substream->runtime;
1888 runtime->hw.info = hw->info;
1889 runtime->hw.formats = hw->formats;
1890 runtime->hw.period_bytes_min = hw->period_bytes_min;
1891 runtime->hw.period_bytes_max = hw->period_bytes_max;
1892 runtime->hw.periods_min = hw->periods_min;
1893 runtime->hw.periods_max = hw->periods_max;
1894 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1895 runtime->hw.fifo_size = hw->fifo_size;
1896 return 0;
1897}
1898EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1899
1900/**
1901 * snd_soc_cnew - create new control
1902 * @_template: control template
1903 * @data: control private data
1904 * @long_name: control long name
1905 * @prefix: control name prefix
1906 *
1907 * Create a new mixer control from a template control.
1908 *
1909 * Returns 0 for success, else error.
1910 */
1911struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1912 void *data, char *long_name,
1913 const char *prefix)
1914{
1915 struct snd_kcontrol_new template;
1916 struct snd_kcontrol *kcontrol;
1917 char *name = NULL;
1918 int name_len;
1919
1920 memcpy(&template, _template, sizeof(template));
1921 template.index = 0;
1922
1923 if (!long_name)
1924 long_name = template.name;
1925
1926 if (prefix) {
1927 name_len = strlen(long_name) + strlen(prefix) + 2;
1928 name = kmalloc(name_len, GFP_KERNEL);
1929 if (!name)
1930 return NULL;
1931
1932 snprintf(name, name_len, "%s %s", prefix, long_name);
1933
1934 template.name = name;
1935 } else {
1936 template.name = long_name;
1937 }
1938
1939 kcontrol = snd_ctl_new1(&template, data);
1940
1941 kfree(name);
1942
1943 return kcontrol;
1944}
1945EXPORT_SYMBOL_GPL(snd_soc_cnew);
1946
1947/**
1948 * snd_soc_add_controls - add an array of controls to a codec.
1949 * Convienience function to add a list of controls. Many codecs were
1950 * duplicating this code.
1951 *
1952 * @codec: codec to add controls to
1953 * @controls: array of controls to add
1954 * @num_controls: number of elements in the array
1955 *
1956 * Return 0 for success, else error.
1957 */
1958int snd_soc_add_controls(struct snd_soc_codec *codec,
1959 const struct snd_kcontrol_new *controls, int num_controls)
1960{
1961 struct snd_card *card = codec->card->snd_card;
1962 int err, i;
1963
1964 for (i = 0; i < num_controls; i++) {
1965 const struct snd_kcontrol_new *control = &controls[i];
1966 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
1967 control->name,
1968 codec->name_prefix));
1969 if (err < 0) {
1970 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
1971 codec->name, control->name, err);
1972 return err;
1973 }
1974 }
1975
1976 return 0;
1977}
1978EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1979
1980/**
1981 * snd_soc_add_platform_controls - add an array of controls to a platform.
1982 * Convienience function to add a list of controls.
1983 *
1984 * @platform: platform to add controls to
1985 * @controls: array of controls to add
1986 * @num_controls: number of elements in the array
1987 *
1988 * Return 0 for success, else error.
1989 */
1990int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1991 const struct snd_kcontrol_new *controls, int num_controls)
1992{
1993 struct snd_card *card = platform->card->snd_card;
1994 int err, i;
1995
1996 for (i = 0; i < num_controls; i++) {
1997 const struct snd_kcontrol_new *control = &controls[i];
1998 err = snd_ctl_add(card, snd_soc_cnew(control, platform,
1999 control->name, NULL));
2000 if (err < 0) {
2001 dev_err(platform->dev, "Failed to add %s %d\n",control->name, err);
2002 return err;
2003 }
2004 }
2005
2006 return 0;
2007}
2008EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2009
2010/**
2011 * snd_soc_info_enum_double - enumerated double mixer info callback
2012 * @kcontrol: mixer control
2013 * @uinfo: control element information
2014 *
2015 * Callback to provide information about a double enumerated
2016 * mixer control.
2017 *
2018 * Returns 0 for success.
2019 */
2020int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2021 struct snd_ctl_elem_info *uinfo)
2022{
2023 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2024
2025 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2026 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2027 uinfo->value.enumerated.items = e->max;
2028
2029 if (uinfo->value.enumerated.item > e->max - 1)
2030 uinfo->value.enumerated.item = e->max - 1;
2031 strcpy(uinfo->value.enumerated.name,
2032 e->texts[uinfo->value.enumerated.item]);
2033 return 0;
2034}
2035EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2036
2037/**
2038 * snd_soc_get_enum_double - enumerated double mixer get callback
2039 * @kcontrol: mixer control
2040 * @ucontrol: control element information
2041 *
2042 * Callback to get the value of a double enumerated mixer.
2043 *
2044 * Returns 0 for success.
2045 */
2046int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2047 struct snd_ctl_elem_value *ucontrol)
2048{
2049 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2050 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2051 unsigned int val, bitmask;
2052
2053 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2054 ;
2055 val = snd_soc_read(codec, e->reg);
2056 ucontrol->value.enumerated.item[0]
2057 = (val >> e->shift_l) & (bitmask - 1);
2058 if (e->shift_l != e->shift_r)
2059 ucontrol->value.enumerated.item[1] =
2060 (val >> e->shift_r) & (bitmask - 1);
2061
2062 return 0;
2063}
2064EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2065
2066/**
2067 * snd_soc_put_enum_double - enumerated double mixer put callback
2068 * @kcontrol: mixer control
2069 * @ucontrol: control element information
2070 *
2071 * Callback to set the value of a double enumerated mixer.
2072 *
2073 * Returns 0 for success.
2074 */
2075int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2076 struct snd_ctl_elem_value *ucontrol)
2077{
2078 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2079 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2080 unsigned int val;
2081 unsigned int mask, bitmask;
2082
2083 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2084 ;
2085 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2086 return -EINVAL;
2087 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2088 mask = (bitmask - 1) << e->shift_l;
2089 if (e->shift_l != e->shift_r) {
2090 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2091 return -EINVAL;
2092 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2093 mask |= (bitmask - 1) << e->shift_r;
2094 }
2095
2096 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2097}
2098EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2099
2100/**
2101 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2102 * @kcontrol: mixer control
2103 * @ucontrol: control element information
2104 *
2105 * Callback to get the value of a double semi enumerated mixer.
2106 *
2107 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2108 * used for handling bitfield coded enumeration for example.
2109 *
2110 * Returns 0 for success.
2111 */
2112int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2113 struct snd_ctl_elem_value *ucontrol)
2114{
2115 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2117 unsigned int reg_val, val, mux;
2118
2119 reg_val = snd_soc_read(codec, e->reg);
2120 val = (reg_val >> e->shift_l) & e->mask;
2121 for (mux = 0; mux < e->max; mux++) {
2122 if (val == e->values[mux])
2123 break;
2124 }
2125 ucontrol->value.enumerated.item[0] = mux;
2126 if (e->shift_l != e->shift_r) {
2127 val = (reg_val >> e->shift_r) & e->mask;
2128 for (mux = 0; mux < e->max; mux++) {
2129 if (val == e->values[mux])
2130 break;
2131 }
2132 ucontrol->value.enumerated.item[1] = mux;
2133 }
2134
2135 return 0;
2136}
2137EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2138
2139/**
2140 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2141 * @kcontrol: mixer control
2142 * @ucontrol: control element information
2143 *
2144 * Callback to set the value of a double semi enumerated mixer.
2145 *
2146 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2147 * used for handling bitfield coded enumeration for example.
2148 *
2149 * Returns 0 for success.
2150 */
2151int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2152 struct snd_ctl_elem_value *ucontrol)
2153{
2154 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2155 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2156 unsigned int val;
2157 unsigned int mask;
2158
2159 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2160 return -EINVAL;
2161 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2162 mask = e->mask << e->shift_l;
2163 if (e->shift_l != e->shift_r) {
2164 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2165 return -EINVAL;
2166 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2167 mask |= e->mask << e->shift_r;
2168 }
2169
2170 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2171}
2172EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2173
2174/**
2175 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2176 * @kcontrol: mixer control
2177 * @uinfo: control element information
2178 *
2179 * Callback to provide information about an external enumerated
2180 * single mixer.
2181 *
2182 * Returns 0 for success.
2183 */
2184int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2185 struct snd_ctl_elem_info *uinfo)
2186{
2187 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2188
2189 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2190 uinfo->count = 1;
2191 uinfo->value.enumerated.items = e->max;
2192
2193 if (uinfo->value.enumerated.item > e->max - 1)
2194 uinfo->value.enumerated.item = e->max - 1;
2195 strcpy(uinfo->value.enumerated.name,
2196 e->texts[uinfo->value.enumerated.item]);
2197 return 0;
2198}
2199EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2200
2201/**
2202 * snd_soc_info_volsw_ext - external single mixer info callback
2203 * @kcontrol: mixer control
2204 * @uinfo: control element information
2205 *
2206 * Callback to provide information about a single external mixer control.
2207 *
2208 * Returns 0 for success.
2209 */
2210int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2211 struct snd_ctl_elem_info *uinfo)
2212{
2213 int max = kcontrol->private_value;
2214
2215 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2216 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2217 else
2218 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2219
2220 uinfo->count = 1;
2221 uinfo->value.integer.min = 0;
2222 uinfo->value.integer.max = max;
2223 return 0;
2224}
2225EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2226
2227/**
2228 * snd_soc_info_volsw - single mixer info callback
2229 * @kcontrol: mixer control
2230 * @uinfo: control element information
2231 *
2232 * Callback to provide information about a single mixer control.
2233 *
2234 * Returns 0 for success.
2235 */
2236int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2237 struct snd_ctl_elem_info *uinfo)
2238{
2239 struct soc_mixer_control *mc =
2240 (struct soc_mixer_control *)kcontrol->private_value;
2241 int platform_max;
2242 unsigned int shift = mc->shift;
2243 unsigned int rshift = mc->rshift;
2244
2245 if (!mc->platform_max)
2246 mc->platform_max = mc->max;
2247 platform_max = mc->platform_max;
2248
2249 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2250 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2251 else
2252 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2253
2254 uinfo->count = shift == rshift ? 1 : 2;
2255 uinfo->value.integer.min = 0;
2256 uinfo->value.integer.max = platform_max;
2257 return 0;
2258}
2259EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2260
2261/**
2262 * snd_soc_get_volsw - single mixer get callback
2263 * @kcontrol: mixer control
2264 * @ucontrol: control element information
2265 *
2266 * Callback to get the value of a single mixer control.
2267 *
2268 * Returns 0 for success.
2269 */
2270int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2271 struct snd_ctl_elem_value *ucontrol)
2272{
2273 struct soc_mixer_control *mc =
2274 (struct soc_mixer_control *)kcontrol->private_value;
2275 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2276 unsigned int reg = mc->reg;
2277 unsigned int shift = mc->shift;
2278 unsigned int rshift = mc->rshift;
2279 int max = mc->max;
2280 unsigned int mask = (1 << fls(max)) - 1;
2281 unsigned int invert = mc->invert;
2282
2283 ucontrol->value.integer.value[0] =
2284 (snd_soc_read(codec, reg) >> shift) & mask;
2285 if (shift != rshift)
2286 ucontrol->value.integer.value[1] =
2287 (snd_soc_read(codec, reg) >> rshift) & mask;
2288 if (invert) {
2289 ucontrol->value.integer.value[0] =
2290 max - ucontrol->value.integer.value[0];
2291 if (shift != rshift)
2292 ucontrol->value.integer.value[1] =
2293 max - ucontrol->value.integer.value[1];
2294 }
2295
2296 return 0;
2297}
2298EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2299
2300/**
2301 * snd_soc_put_volsw - single mixer put callback
2302 * @kcontrol: mixer control
2303 * @ucontrol: control element information
2304 *
2305 * Callback to set the value of a single mixer control.
2306 *
2307 * Returns 0 for success.
2308 */
2309int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2310 struct snd_ctl_elem_value *ucontrol)
2311{
2312 struct soc_mixer_control *mc =
2313 (struct soc_mixer_control *)kcontrol->private_value;
2314 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2315 unsigned int reg = mc->reg;
2316 unsigned int shift = mc->shift;
2317 unsigned int rshift = mc->rshift;
2318 int max = mc->max;
2319 unsigned int mask = (1 << fls(max)) - 1;
2320 unsigned int invert = mc->invert;
2321 unsigned int val, val2, val_mask;
2322
2323 val = (ucontrol->value.integer.value[0] & mask);
2324 if (invert)
2325 val = max - val;
2326 val_mask = mask << shift;
2327 val = val << shift;
2328 if (shift != rshift) {
2329 val2 = (ucontrol->value.integer.value[1] & mask);
2330 if (invert)
2331 val2 = max - val2;
2332 val_mask |= mask << rshift;
2333 val |= val2 << rshift;
2334 }
2335 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2336}
2337EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2338
2339/**
2340 * snd_soc_info_volsw_2r - double mixer info callback
2341 * @kcontrol: mixer control
2342 * @uinfo: control element information
2343 *
2344 * Callback to provide information about a double mixer control that
2345 * spans 2 codec registers.
2346 *
2347 * Returns 0 for success.
2348 */
2349int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2350 struct snd_ctl_elem_info *uinfo)
2351{
2352 struct soc_mixer_control *mc =
2353 (struct soc_mixer_control *)kcontrol->private_value;
2354 int platform_max;
2355
2356 if (!mc->platform_max)
2357 mc->platform_max = mc->max;
2358 platform_max = mc->platform_max;
2359
2360 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2361 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2362 else
2363 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2364
2365 uinfo->count = 2;
2366 uinfo->value.integer.min = 0;
2367 uinfo->value.integer.max = platform_max;
2368 return 0;
2369}
2370EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2371
2372/**
2373 * snd_soc_get_volsw_2r - double mixer get callback
2374 * @kcontrol: mixer control
2375 * @ucontrol: control element information
2376 *
2377 * Callback to get the value of a double mixer control that spans 2 registers.
2378 *
2379 * Returns 0 for success.
2380 */
2381int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2382 struct snd_ctl_elem_value *ucontrol)
2383{
2384 struct soc_mixer_control *mc =
2385 (struct soc_mixer_control *)kcontrol->private_value;
2386 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2387 unsigned int reg = mc->reg;
2388 unsigned int reg2 = mc->rreg;
2389 unsigned int shift = mc->shift;
2390 int max = mc->max;
2391 unsigned int mask = (1 << fls(max)) - 1;
2392 unsigned int invert = mc->invert;
2393
2394 ucontrol->value.integer.value[0] =
2395 (snd_soc_read(codec, reg) >> shift) & mask;
2396 ucontrol->value.integer.value[1] =
2397 (snd_soc_read(codec, reg2) >> shift) & mask;
2398 if (invert) {
2399 ucontrol->value.integer.value[0] =
2400 max - ucontrol->value.integer.value[0];
2401 ucontrol->value.integer.value[1] =
2402 max - ucontrol->value.integer.value[1];
2403 }
2404
2405 return 0;
2406}
2407EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2408
2409/**
2410 * snd_soc_put_volsw_2r - double mixer set callback
2411 * @kcontrol: mixer control
2412 * @ucontrol: control element information
2413 *
2414 * Callback to set the value of a double mixer control that spans 2 registers.
2415 *
2416 * Returns 0 for success.
2417 */
2418int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2419 struct snd_ctl_elem_value *ucontrol)
2420{
2421 struct soc_mixer_control *mc =
2422 (struct soc_mixer_control *)kcontrol->private_value;
2423 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2424 unsigned int reg = mc->reg;
2425 unsigned int reg2 = mc->rreg;
2426 unsigned int shift = mc->shift;
2427 int max = mc->max;
2428 unsigned int mask = (1 << fls(max)) - 1;
2429 unsigned int invert = mc->invert;
2430 int err;
2431 unsigned int val, val2, val_mask;
2432
2433 val_mask = mask << shift;
2434 val = (ucontrol->value.integer.value[0] & mask);
2435 val2 = (ucontrol->value.integer.value[1] & mask);
2436
2437 if (invert) {
2438 val = max - val;
2439 val2 = max - val2;
2440 }
2441
2442 val = val << shift;
2443 val2 = val2 << shift;
2444
2445 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2446 if (err < 0)
2447 return err;
2448
2449 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2450 return err;
2451}
2452EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2453
2454/**
2455 * snd_soc_info_volsw_s8 - signed mixer info callback
2456 * @kcontrol: mixer control
2457 * @uinfo: control element information
2458 *
2459 * Callback to provide information about a signed mixer control.
2460 *
2461 * Returns 0 for success.
2462 */
2463int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2464 struct snd_ctl_elem_info *uinfo)
2465{
2466 struct soc_mixer_control *mc =
2467 (struct soc_mixer_control *)kcontrol->private_value;
2468 int platform_max;
2469 int min = mc->min;
2470
2471 if (!mc->platform_max)
2472 mc->platform_max = mc->max;
2473 platform_max = mc->platform_max;
2474
2475 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2476 uinfo->count = 2;
2477 uinfo->value.integer.min = 0;
2478 uinfo->value.integer.max = platform_max - min;
2479 return 0;
2480}
2481EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2482
2483/**
2484 * snd_soc_get_volsw_s8 - signed mixer get callback
2485 * @kcontrol: mixer control
2486 * @ucontrol: control element information
2487 *
2488 * Callback to get the value of a signed mixer control.
2489 *
2490 * Returns 0 for success.
2491 */
2492int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2493 struct snd_ctl_elem_value *ucontrol)
2494{
2495 struct soc_mixer_control *mc =
2496 (struct soc_mixer_control *)kcontrol->private_value;
2497 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2498 unsigned int reg = mc->reg;
2499 int min = mc->min;
2500 int val = snd_soc_read(codec, reg);
2501
2502 ucontrol->value.integer.value[0] =
2503 ((signed char)(val & 0xff))-min;
2504 ucontrol->value.integer.value[1] =
2505 ((signed char)((val >> 8) & 0xff))-min;
2506 return 0;
2507}
2508EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2509
2510/**
2511 * snd_soc_put_volsw_sgn - signed mixer put callback
2512 * @kcontrol: mixer control
2513 * @ucontrol: control element information
2514 *
2515 * Callback to set the value of a signed mixer control.
2516 *
2517 * Returns 0 for success.
2518 */
2519int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2520 struct snd_ctl_elem_value *ucontrol)
2521{
2522 struct soc_mixer_control *mc =
2523 (struct soc_mixer_control *)kcontrol->private_value;
2524 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2525 unsigned int reg = mc->reg;
2526 int min = mc->min;
2527 unsigned int val;
2528
2529 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2530 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2531
2532 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2533}
2534EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2535
2536/**
2537 * snd_soc_limit_volume - Set new limit to an existing volume control.
2538 *
2539 * @codec: where to look for the control
2540 * @name: Name of the control
2541 * @max: new maximum limit
2542 *
2543 * Return 0 for success, else error.
2544 */
2545int snd_soc_limit_volume(struct snd_soc_codec *codec,
2546 const char *name, int max)
2547{
2548 struct snd_card *card = codec->card->snd_card;
2549 struct snd_kcontrol *kctl;
2550 struct soc_mixer_control *mc;
2551 int found = 0;
2552 int ret = -EINVAL;
2553
2554 /* Sanity check for name and max */
2555 if (unlikely(!name || max <= 0))
2556 return -EINVAL;
2557
2558 list_for_each_entry(kctl, &card->controls, list) {
2559 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2560 found = 1;
2561 break;
2562 }
2563 }
2564 if (found) {
2565 mc = (struct soc_mixer_control *)kctl->private_value;
2566 if (max <= mc->max) {
2567 mc->platform_max = max;
2568 ret = 0;
2569 }
2570 }
2571 return ret;
2572}
2573EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2574
2575/**
2576 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2577 * mixer info callback
2578 * @kcontrol: mixer control
2579 * @uinfo: control element information
2580 *
2581 * Returns 0 for success.
2582 */
2583int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2584 struct snd_ctl_elem_info *uinfo)
2585{
2586 struct soc_mixer_control *mc =
2587 (struct soc_mixer_control *)kcontrol->private_value;
2588 int max = mc->max;
2589 int min = mc->min;
2590
2591 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2592 uinfo->count = 2;
2593 uinfo->value.integer.min = 0;
2594 uinfo->value.integer.max = max-min;
2595
2596 return 0;
2597}
2598EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2599
2600/**
2601 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2602 * mixer get callback
2603 * @kcontrol: mixer control
2604 * @uinfo: control element information
2605 *
2606 * Returns 0 for success.
2607 */
2608int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2609 struct snd_ctl_elem_value *ucontrol)
2610{
2611 struct soc_mixer_control *mc =
2612 (struct soc_mixer_control *)kcontrol->private_value;
2613 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2614 unsigned int mask = (1<<mc->shift)-1;
2615 int min = mc->min;
2616 int val = snd_soc_read(codec, mc->reg) & mask;
2617 int valr = snd_soc_read(codec, mc->rreg) & mask;
2618
2619 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2620 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2621 return 0;
2622}
2623EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2624
2625/**
2626 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2627 * mixer put callback
2628 * @kcontrol: mixer control
2629 * @uinfo: control element information
2630 *
2631 * Returns 0 for success.
2632 */
2633int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2634 struct snd_ctl_elem_value *ucontrol)
2635{
2636 struct soc_mixer_control *mc =
2637 (struct soc_mixer_control *)kcontrol->private_value;
2638 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2639 unsigned int mask = (1<<mc->shift)-1;
2640 int min = mc->min;
2641 int ret;
2642 unsigned int val, valr, oval, ovalr;
2643
2644 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2645 val &= mask;
2646 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2647 valr &= mask;
2648
2649 oval = snd_soc_read(codec, mc->reg) & mask;
2650 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2651
2652 ret = 0;
2653 if (oval != val) {
2654 ret = snd_soc_write(codec, mc->reg, val);
2655 if (ret < 0)
2656 return ret;
2657 }
2658 if (ovalr != valr) {
2659 ret = snd_soc_write(codec, mc->rreg, valr);
2660 if (ret < 0)
2661 return ret;
2662 }
2663
2664 return 0;
2665}
2666EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2667
2668/**
2669 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2670 * @dai: DAI
2671 * @clk_id: DAI specific clock ID
2672 * @freq: new clock frequency in Hz
2673 * @dir: new clock direction - input/output.
2674 *
2675 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2676 */
2677int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2678 unsigned int freq, int dir)
2679{
2680 if (dai->driver && dai->driver->ops->set_sysclk)
2681 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2682 else if (dai->codec && dai->codec->driver->set_sysclk)
2683 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
2684 freq, dir);
2685 else
2686 return -EINVAL;
2687}
2688EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2689
2690/**
2691 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2692 * @codec: CODEC
2693 * @clk_id: DAI specific clock ID
2694 * @freq: new clock frequency in Hz
2695 * @dir: new clock direction - input/output.
2696 *
2697 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2698 */
2699int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2700 unsigned int freq, int dir)
2701{
2702 if (codec->driver->set_sysclk)
2703 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
2704 else
2705 return -EINVAL;
2706}
2707EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2708
2709/**
2710 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2711 * @dai: DAI
2712 * @div_id: DAI specific clock divider ID
2713 * @div: new clock divisor.
2714 *
2715 * Configures the clock dividers. This is used to derive the best DAI bit and
2716 * frame clocks from the system or master clock. It's best to set the DAI bit
2717 * and frame clocks as low as possible to save system power.
2718 */
2719int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2720 int div_id, int div)
2721{
2722 if (dai->driver && dai->driver->ops->set_clkdiv)
2723 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2724 else
2725 return -EINVAL;
2726}
2727EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2728
2729/**
2730 * snd_soc_dai_set_pll - configure DAI PLL.
2731 * @dai: DAI
2732 * @pll_id: DAI specific PLL ID
2733 * @source: DAI specific source for the PLL
2734 * @freq_in: PLL input clock frequency in Hz
2735 * @freq_out: requested PLL output clock frequency in Hz
2736 *
2737 * Configures and enables PLL to generate output clock based on input clock.
2738 */
2739int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2740 unsigned int freq_in, unsigned int freq_out)
2741{
2742 if (dai->driver && dai->driver->ops->set_pll)
2743 return dai->driver->ops->set_pll(dai, pll_id, source,
2744 freq_in, freq_out);
2745 else if (dai->codec && dai->codec->driver->set_pll)
2746 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2747 freq_in, freq_out);
2748 else
2749 return -EINVAL;
2750}
2751EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2752
2753/*
2754 * snd_soc_codec_set_pll - configure codec PLL.
2755 * @codec: CODEC
2756 * @pll_id: DAI specific PLL ID
2757 * @source: DAI specific source for the PLL
2758 * @freq_in: PLL input clock frequency in Hz
2759 * @freq_out: requested PLL output clock frequency in Hz
2760 *
2761 * Configures and enables PLL to generate output clock based on input clock.
2762 */
2763int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2764 unsigned int freq_in, unsigned int freq_out)
2765{
2766 if (codec->driver->set_pll)
2767 return codec->driver->set_pll(codec, pll_id, source,
2768 freq_in, freq_out);
2769 else
2770 return -EINVAL;
2771}
2772EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2773
2774/**
2775 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2776 * @dai: DAI
2777 * @fmt: SND_SOC_DAIFMT_ format value.
2778 *
2779 * Configures the DAI hardware format and clocking.
2780 */
2781int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2782{
2783 if (dai->driver && dai->driver->ops->set_fmt)
2784 return dai->driver->ops->set_fmt(dai, fmt);
2785 else
2786 return -EINVAL;
2787}
2788EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2789
2790/**
2791 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2792 * @dai: DAI
2793 * @tx_mask: bitmask representing active TX slots.
2794 * @rx_mask: bitmask representing active RX slots.
2795 * @slots: Number of slots in use.
2796 * @slot_width: Width in bits for each slot.
2797 *
2798 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2799 * specific.
2800 */
2801int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2802 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2803{
2804 if (dai->driver && dai->driver->ops->set_tdm_slot)
2805 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2806 slots, slot_width);
2807 else
2808 return -EINVAL;
2809}
2810EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2811
2812/**
2813 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2814 * @dai: DAI
2815 * @tx_num: how many TX channels
2816 * @tx_slot: pointer to an array which imply the TX slot number channel
2817 * 0~num-1 uses
2818 * @rx_num: how many RX channels
2819 * @rx_slot: pointer to an array which imply the RX slot number channel
2820 * 0~num-1 uses
2821 *
2822 * configure the relationship between channel number and TDM slot number.
2823 */
2824int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2825 unsigned int tx_num, unsigned int *tx_slot,
2826 unsigned int rx_num, unsigned int *rx_slot)
2827{
2828 if (dai->driver && dai->driver->ops->set_channel_map)
2829 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2830 rx_num, rx_slot);
2831 else
2832 return -EINVAL;
2833}
2834EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2835
2836/**
2837 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2838 * @dai: DAI
2839 * @tristate: tristate enable
2840 *
2841 * Tristates the DAI so that others can use it.
2842 */
2843int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2844{
2845 if (dai->driver && dai->driver->ops->set_tristate)
2846 return dai->driver->ops->set_tristate(dai, tristate);
2847 else
2848 return -EINVAL;
2849}
2850EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2851
2852/**
2853 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2854 * @dai: DAI
2855 * @mute: mute enable
2856 *
2857 * Mutes the DAI DAC.
2858 */
2859int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2860{
2861 if (dai->driver && dai->driver->ops->digital_mute)
2862 return dai->driver->ops->digital_mute(dai, mute);
2863 else
2864 return -EINVAL;
2865}
2866EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2867
2868/**
2869 * snd_soc_register_card - Register a card with the ASoC core
2870 *
2871 * @card: Card to register
2872 *
2873 */
2874int snd_soc_register_card(struct snd_soc_card *card)
2875{
2876 int i;
2877
2878 if (!card->name || !card->dev)
2879 return -EINVAL;
2880
2881 dev_set_drvdata(card->dev, card);
2882
2883 snd_soc_initialize_card_lists(card);
2884
2885 soc_init_card_debugfs(card);
2886
2887 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
2888 (card->num_links + card->num_aux_devs),
2889 GFP_KERNEL);
2890 if (card->rtd == NULL)
2891 return -ENOMEM;
2892 card->rtd_aux = &card->rtd[card->num_links];
2893
2894 for (i = 0; i < card->num_links; i++)
2895 card->rtd[i].dai_link = &card->dai_link[i];
2896
2897 INIT_LIST_HEAD(&card->list);
2898 card->instantiated = 0;
2899 mutex_init(&card->mutex);
2900
2901 mutex_lock(&client_mutex);
2902 list_add(&card->list, &card_list);
2903 snd_soc_instantiate_cards();
2904 mutex_unlock(&client_mutex);
2905
2906 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2907
2908 return 0;
2909}
2910EXPORT_SYMBOL_GPL(snd_soc_register_card);
2911
2912/**
2913 * snd_soc_unregister_card - Unregister a card with the ASoC core
2914 *
2915 * @card: Card to unregister
2916 *
2917 */
2918int snd_soc_unregister_card(struct snd_soc_card *card)
2919{
2920 if (card->instantiated)
2921 soc_cleanup_card_resources(card);
2922 mutex_lock(&client_mutex);
2923 list_del(&card->list);
2924 mutex_unlock(&client_mutex);
2925 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2926
2927 return 0;
2928}
2929EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2930
2931/*
2932 * Simplify DAI link configuration by removing ".-1" from device names
2933 * and sanitizing names.
2934 */
2935static char *fmt_single_name(struct device *dev, int *id)
2936{
2937 char *found, name[NAME_SIZE];
2938 int id1, id2;
2939
2940 if (dev_name(dev) == NULL)
2941 return NULL;
2942
2943 strlcpy(name, dev_name(dev), NAME_SIZE);
2944
2945 /* are we a "%s.%d" name (platform and SPI components) */
2946 found = strstr(name, dev->driver->name);
2947 if (found) {
2948 /* get ID */
2949 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2950
2951 /* discard ID from name if ID == -1 */
2952 if (*id == -1)
2953 found[strlen(dev->driver->name)] = '\0';
2954 }
2955
2956 } else {
2957 /* I2C component devices are named "bus-addr" */
2958 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2959 char tmp[NAME_SIZE];
2960
2961 /* create unique ID number from I2C addr and bus */
2962 *id = ((id1 & 0xffff) << 16) + id2;
2963
2964 /* sanitize component name for DAI link creation */
2965 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2966 strlcpy(name, tmp, NAME_SIZE);
2967 } else
2968 *id = 0;
2969 }
2970
2971 return kstrdup(name, GFP_KERNEL);
2972}
2973
2974/*
2975 * Simplify DAI link naming for single devices with multiple DAIs by removing
2976 * any ".-1" and using the DAI name (instead of device name).
2977 */
2978static inline char *fmt_multiple_name(struct device *dev,
2979 struct snd_soc_dai_driver *dai_drv)
2980{
2981 if (dai_drv->name == NULL) {
2982 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
2983 dev_name(dev));
2984 return NULL;
2985 }
2986
2987 return kstrdup(dai_drv->name, GFP_KERNEL);
2988}
2989
2990/**
2991 * snd_soc_register_dai - Register a DAI with the ASoC core
2992 *
2993 * @dai: DAI to register
2994 */
2995int snd_soc_register_dai(struct device *dev,
2996 struct snd_soc_dai_driver *dai_drv)
2997{
2998 struct snd_soc_dai *dai;
2999
3000 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3001
3002 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3003 if (dai == NULL)
3004 return -ENOMEM;
3005
3006 /* create DAI component name */
3007 dai->name = fmt_single_name(dev, &dai->id);
3008 if (dai->name == NULL) {
3009 kfree(dai);
3010 return -ENOMEM;
3011 }
3012
3013 dai->dev = dev;
3014 dai->driver = dai_drv;
3015 if (!dai->driver->ops)
3016 dai->driver->ops = &null_dai_ops;
3017
3018 mutex_lock(&client_mutex);
3019 list_add(&dai->list, &dai_list);
3020 snd_soc_instantiate_cards();
3021 mutex_unlock(&client_mutex);
3022
3023 pr_debug("Registered DAI '%s'\n", dai->name);
3024
3025 return 0;
3026}
3027EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3028
3029/**
3030 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3031 *
3032 * @dai: DAI to unregister
3033 */
3034void snd_soc_unregister_dai(struct device *dev)
3035{
3036 struct snd_soc_dai *dai;
3037
3038 list_for_each_entry(dai, &dai_list, list) {
3039 if (dev == dai->dev)
3040 goto found;
3041 }
3042 return;
3043
3044found:
3045 mutex_lock(&client_mutex);
3046 list_del(&dai->list);
3047 mutex_unlock(&client_mutex);
3048
3049 pr_debug("Unregistered DAI '%s'\n", dai->name);
3050 kfree(dai->name);
3051 kfree(dai);
3052}
3053EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3054
3055/**
3056 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3057 *
3058 * @dai: Array of DAIs to register
3059 * @count: Number of DAIs
3060 */
3061int snd_soc_register_dais(struct device *dev,
3062 struct snd_soc_dai_driver *dai_drv, size_t count)
3063{
3064 struct snd_soc_dai *dai;
3065 int i, ret = 0;
3066
3067 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3068
3069 for (i = 0; i < count; i++) {
3070
3071 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3072 if (dai == NULL) {
3073 ret = -ENOMEM;
3074 goto err;
3075 }
3076
3077 /* create DAI component name */
3078 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3079 if (dai->name == NULL) {
3080 kfree(dai);
3081 ret = -EINVAL;
3082 goto err;
3083 }
3084
3085 dai->dev = dev;
3086 dai->driver = &dai_drv[i];
3087 if (dai->driver->id)
3088 dai->id = dai->driver->id;
3089 else
3090 dai->id = i;
3091 if (!dai->driver->ops)
3092 dai->driver->ops = &null_dai_ops;
3093
3094 mutex_lock(&client_mutex);
3095 list_add(&dai->list, &dai_list);
3096 mutex_unlock(&client_mutex);
3097
3098 pr_debug("Registered DAI '%s'\n", dai->name);
3099 }
3100
3101 mutex_lock(&client_mutex);
3102 snd_soc_instantiate_cards();
3103 mutex_unlock(&client_mutex);
3104 return 0;
3105
3106err:
3107 for (i--; i >= 0; i--)
3108 snd_soc_unregister_dai(dev);
3109
3110 return ret;
3111}
3112EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3113
3114/**
3115 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3116 *
3117 * @dai: Array of DAIs to unregister
3118 * @count: Number of DAIs
3119 */
3120void snd_soc_unregister_dais(struct device *dev, size_t count)
3121{
3122 int i;
3123
3124 for (i = 0; i < count; i++)
3125 snd_soc_unregister_dai(dev);
3126}
3127EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3128
3129/**
3130 * snd_soc_register_platform - Register a platform with the ASoC core
3131 *
3132 * @platform: platform to register
3133 */
3134int snd_soc_register_platform(struct device *dev,
3135 struct snd_soc_platform_driver *platform_drv)
3136{
3137 struct snd_soc_platform *platform;
3138
3139 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3140
3141 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3142 if (platform == NULL)
3143 return -ENOMEM;
3144
3145 /* create platform component name */
3146 platform->name = fmt_single_name(dev, &platform->id);
3147 if (platform->name == NULL) {
3148 kfree(platform);
3149 return -ENOMEM;
3150 }
3151
3152 platform->dev = dev;
3153 platform->driver = platform_drv;
3154 platform->dapm.dev = dev;
3155 platform->dapm.platform = platform;
3156
3157 mutex_lock(&client_mutex);
3158 list_add(&platform->list, &platform_list);
3159 snd_soc_instantiate_cards();
3160 mutex_unlock(&client_mutex);
3161
3162 pr_debug("Registered platform '%s'\n", platform->name);
3163
3164 return 0;
3165}
3166EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3167
3168/**
3169 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3170 *
3171 * @platform: platform to unregister
3172 */
3173void snd_soc_unregister_platform(struct device *dev)
3174{
3175 struct snd_soc_platform *platform;
3176
3177 list_for_each_entry(platform, &platform_list, list) {
3178 if (dev == platform->dev)
3179 goto found;
3180 }
3181 return;
3182
3183found:
3184 mutex_lock(&client_mutex);
3185 list_del(&platform->list);
3186 mutex_unlock(&client_mutex);
3187
3188 pr_debug("Unregistered platform '%s'\n", platform->name);
3189 kfree(platform->name);
3190 kfree(platform);
3191}
3192EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3193
3194static u64 codec_format_map[] = {
3195 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3196 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3197 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3198 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3199 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3200 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3201 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3202 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3203 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3204 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3205 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3206 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3207 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3208 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3209 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3210 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3211};
3212
3213/* Fix up the DAI formats for endianness: codecs don't actually see
3214 * the endianness of the data but we're using the CPU format
3215 * definitions which do need to include endianness so we ensure that
3216 * codec DAIs always have both big and little endian variants set.
3217 */
3218static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3219{
3220 int i;
3221
3222 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3223 if (stream->formats & codec_format_map[i])
3224 stream->formats |= codec_format_map[i];
3225}
3226
3227/**
3228 * snd_soc_register_codec - Register a codec with the ASoC core
3229 *
3230 * @codec: codec to register
3231 */
3232int snd_soc_register_codec(struct device *dev,
3233 const struct snd_soc_codec_driver *codec_drv,
3234 struct snd_soc_dai_driver *dai_drv,
3235 int num_dai)
3236{
3237 size_t reg_size;
3238 struct snd_soc_codec *codec;
3239 int ret, i;
3240
3241 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3242
3243 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3244 if (codec == NULL)
3245 return -ENOMEM;
3246
3247 /* create CODEC component name */
3248 codec->name = fmt_single_name(dev, &codec->id);
3249 if (codec->name == NULL) {
3250 kfree(codec);
3251 return -ENOMEM;
3252 }
3253
3254 if (codec_drv->compress_type)
3255 codec->compress_type = codec_drv->compress_type;
3256 else
3257 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3258
3259 codec->write = codec_drv->write;
3260 codec->read = codec_drv->read;
3261 codec->volatile_register = codec_drv->volatile_register;
3262 codec->readable_register = codec_drv->readable_register;
3263 codec->writable_register = codec_drv->writable_register;
3264 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3265 codec->dapm.dev = dev;
3266 codec->dapm.codec = codec;
3267 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3268 codec->dev = dev;
3269 codec->driver = codec_drv;
3270 codec->num_dai = num_dai;
3271 mutex_init(&codec->mutex);
3272
3273 /* allocate CODEC register cache */
3274 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3275 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3276 codec->reg_size = reg_size;
3277 /* it is necessary to make a copy of the default register cache
3278 * because in the case of using a compression type that requires
3279 * the default register cache to be marked as __devinitconst the
3280 * kernel might have freed the array by the time we initialize
3281 * the cache.
3282 */
3283 if (codec_drv->reg_cache_default) {
3284 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3285 reg_size, GFP_KERNEL);
3286 if (!codec->reg_def_copy) {
3287 ret = -ENOMEM;
3288 goto fail;
3289 }
3290 }
3291 }
3292
3293 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3294 if (!codec->volatile_register)
3295 codec->volatile_register = snd_soc_default_volatile_register;
3296 if (!codec->readable_register)
3297 codec->readable_register = snd_soc_default_readable_register;
3298 if (!codec->writable_register)
3299 codec->writable_register = snd_soc_default_writable_register;
3300 }
3301
3302 for (i = 0; i < num_dai; i++) {
3303 fixup_codec_formats(&dai_drv[i].playback);
3304 fixup_codec_formats(&dai_drv[i].capture);
3305 }
3306
3307 /* register any DAIs */
3308 if (num_dai) {
3309 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3310 if (ret < 0)
3311 goto fail;
3312 }
3313
3314 mutex_lock(&client_mutex);
3315 list_add(&codec->list, &codec_list);
3316 snd_soc_instantiate_cards();
3317 mutex_unlock(&client_mutex);
3318
3319 pr_debug("Registered codec '%s'\n", codec->name);
3320 return 0;
3321
3322fail:
3323 kfree(codec->reg_def_copy);
3324 codec->reg_def_copy = NULL;
3325 kfree(codec->name);
3326 kfree(codec);
3327 return ret;
3328}
3329EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3330
3331/**
3332 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3333 *
3334 * @codec: codec to unregister
3335 */
3336void snd_soc_unregister_codec(struct device *dev)
3337{
3338 struct snd_soc_codec *codec;
3339 int i;
3340
3341 list_for_each_entry(codec, &codec_list, list) {
3342 if (dev == codec->dev)
3343 goto found;
3344 }
3345 return;
3346
3347found:
3348 if (codec->num_dai)
3349 for (i = 0; i < codec->num_dai; i++)
3350 snd_soc_unregister_dai(dev);
3351
3352 mutex_lock(&client_mutex);
3353 list_del(&codec->list);
3354 mutex_unlock(&client_mutex);
3355
3356 pr_debug("Unregistered codec '%s'\n", codec->name);
3357
3358 snd_soc_cache_exit(codec);
3359 kfree(codec->reg_def_copy);
3360 kfree(codec->name);
3361 kfree(codec);
3362}
3363EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3364
3365static int __init snd_soc_init(void)
3366{
3367#ifdef CONFIG_DEBUG_FS
3368 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3369 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3370 printk(KERN_WARNING
3371 "ASoC: Failed to create debugfs directory\n");
3372 snd_soc_debugfs_root = NULL;
3373 }
3374
3375 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3376 &codec_list_fops))
3377 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3378
3379 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3380 &dai_list_fops))
3381 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3382
3383 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3384 &platform_list_fops))
3385 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3386#endif
3387
3388 snd_soc_util_init();
3389
3390 return platform_driver_register(&soc_driver);
3391}
3392module_init(snd_soc_init);
3393
3394static void __exit snd_soc_exit(void)
3395{
3396 snd_soc_util_exit();
3397
3398#ifdef CONFIG_DEBUG_FS
3399 debugfs_remove_recursive(snd_soc_debugfs_root);
3400#endif
3401 platform_driver_unregister(&soc_driver);
3402}
3403module_exit(snd_soc_exit);
3404
3405/* Module information */
3406MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3407MODULE_DESCRIPTION("ALSA SoC Core");
3408MODULE_LICENSE("GPL");
3409MODULE_ALIAS("platform:soc-audio");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-core.c -- ALSA SoC Audio Layer
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Author: Liam Girdwood <lrg@slimlogic.co.uk>
11// with code, comments and ideas from :-
12// Richard Purdie <richard@openedhand.com>
13//
14// TODO:
15// o Add hw rules to enforce rates, etc.
16// o More testing with other codecs/machines.
17// o Add more codecs and platforms to ensure good API coverage.
18// o Support TDM on PCM and I2S
19
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/pm.h>
25#include <linux/bitops.h>
26#include <linux/debugfs.h>
27#include <linux/platform_device.h>
28#include <linux/pinctrl/consumer.h>
29#include <linux/ctype.h>
30#include <linux/slab.h>
31#include <linux/of.h>
32#include <linux/of_graph.h>
33#include <linux/dmi.h>
34#include <linux/acpi.h>
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/soc-dpcm.h>
40#include <sound/soc-topology.h>
41#include <sound/soc-link.h>
42#include <sound/initval.h>
43
44#define CREATE_TRACE_POINTS
45#include <trace/events/asoc.h>
46
47static DEFINE_MUTEX(client_mutex);
48static LIST_HEAD(component_list);
49static LIST_HEAD(unbind_card_list);
50
51#define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
53
54/*
55 * This is used if driver don't need to have CPU/Codec/Platform
56 * dai_link. see soc.h
57 */
58struct snd_soc_dai_link_component null_dailink_component[0];
59EXPORT_SYMBOL_GPL(null_dailink_component);
60
61/*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66static int pmdown_time = 5000;
67module_param(pmdown_time, int, 0);
68MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
72{
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
74
75 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
76}
77
78static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
81{
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
83 int ret;
84
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
86 if (ret)
87 return ret;
88
89 return count;
90}
91
92static DEVICE_ATTR_RW(pmdown_time);
93
94static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
96 NULL
97};
98
99static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
101{
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
104
105 if (!rtd)
106 return 0;
107
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
111}
112
113static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
116};
117
118static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
121};
122
123static const struct attribute_group *soc_dev_attr_groups[] = {
124 &soc_dapm_dev_group,
125 &soc_dev_group,
126 NULL
127};
128
129#ifdef CONFIG_DEBUG_FS
130struct dentry *snd_soc_debugfs_root;
131EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
132
133static void soc_init_component_debugfs(struct snd_soc_component *component)
134{
135 if (!component->card->debugfs_card_root)
136 return;
137
138 if (component->debugfs_prefix) {
139 char *name;
140
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
143 if (name) {
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
146 kfree(name);
147 }
148 } else {
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
151 }
152
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
155}
156
157static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
158{
159 if (!component->debugfs_root)
160 return;
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
163}
164
165static int dai_list_show(struct seq_file *m, void *v)
166{
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
169
170 mutex_lock(&client_mutex);
171
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
175
176 mutex_unlock(&client_mutex);
177
178 return 0;
179}
180DEFINE_SHOW_ATTRIBUTE(dai_list);
181
182static int component_list_show(struct seq_file *m, void *v)
183{
184 struct snd_soc_component *component;
185
186 mutex_lock(&client_mutex);
187
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
190
191 mutex_unlock(&client_mutex);
192
193 return 0;
194}
195DEFINE_SHOW_ATTRIBUTE(component_list);
196
197static void soc_init_card_debugfs(struct snd_soc_card *card)
198{
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
201
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
203 &card->pop_time);
204
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
206}
207
208static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
209{
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
212}
213
214static void snd_soc_debugfs_init(void)
215{
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
217
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
219 &dai_list_fops);
220
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
223}
224
225static void snd_soc_debugfs_exit(void)
226{
227 debugfs_remove_recursive(snd_soc_debugfs_root);
228}
229
230#else
231
232static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236static inline void snd_soc_debugfs_init(void) { }
237static inline void snd_soc_debugfs_exit(void) { }
238
239#endif
240
241static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
242 const struct of_phandle_args *args2)
243{
244 if (!args1 || !args2)
245 return 0;
246
247 if (args1->np != args2->np)
248 return 0;
249
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
252 return 0;
253
254 return 1;
255}
256
257static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
258{
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
260}
261
262static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
263{
264 return (dlc->name && dlc->of_node);
265}
266
267static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
268{
269 return !(dlc->dai_args || dlc->dai_name);
270}
271
272static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
274{
275 if (!dlc)
276 return 0;
277
278 if (dlc->dai_args)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
280
281 if (!dlc->dai_name)
282 return 1;
283
284 /* see snd_soc_dai_name_get() */
285
286 if (dai->driver->name &&
287 strcmp(dlc->dai_name, dai->driver->name) == 0)
288 return 1;
289
290 if (strcmp(dlc->dai_name, dai->name) == 0)
291 return 1;
292
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
295 return 1;
296
297 return 0;
298}
299
300const char *snd_soc_dai_name_get(const struct snd_soc_dai *dai)
301{
302 /* see snd_soc_is_matching_dai() */
303 if (dai->driver->name)
304 return dai->driver->name;
305
306 if (dai->name)
307 return dai->name;
308
309 if (dai->component->name)
310 return dai->component->name;
311
312 return NULL;
313}
314EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
315
316static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
318{
319 struct snd_soc_component *comp;
320 int i;
321
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
325 return 0;
326 }
327
328 /* see for_each_rtd_components */
329 rtd->num_components++; // increment flex array count at first
330 rtd->components[rtd->num_components - 1] = component;
331
332 return 0;
333}
334
335struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
337{
338 struct snd_soc_component *component;
339 int i;
340
341 if (!driver_name)
342 return NULL;
343
344 /*
345 * NOTE
346 *
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
351 */
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
354
355 if (!component_name)
356 continue;
357
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
360 return component;
361 }
362
363 return NULL;
364}
365EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
366
367struct snd_soc_component
368*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
369{
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
372
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
376 (!driver_name ||
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
380 break;
381 }
382 }
383
384 return found_component;
385}
386EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
387
388struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
390{
391 struct snd_soc_component *component;
392
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
396
397 return component;
398}
399EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
400
401struct snd_soc_pcm_runtime
402*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
404{
405 struct snd_soc_pcm_runtime *rtd;
406
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
409 return rtd;
410 }
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
412 return NULL;
413}
414EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
415
416/*
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
420 */
421void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
422{
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
425
426 snd_soc_dpcm_mutex_lock(rtd);
427
428 dev_dbg(rtd->dev,
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
434
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
437 rtd->pop_wait = 0;
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
440 }
441
442 snd_soc_dpcm_mutex_unlock(rtd);
443}
444EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
445
446static void soc_release_rtd_dev(struct device *dev)
447{
448 /* "dev" means "rtd->dev" */
449 kfree(dev);
450}
451
452static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
453{
454 if (!rtd)
455 return;
456
457 list_del(&rtd->list);
458
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
462
463 /*
464 * we don't need to call kfree() for rtd->dev
465 * see
466 * soc_release_rtd_dev()
467 *
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
470 * see
471 * soc_new_pcm_runtime()
472 *
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
475 * see
476 * soc_new_pcm_runtime()
477 *
478 * rtd = devm_kzalloc(dev, ...);
479 * rtd->dev = dev
480 */
481 device_unregister(rtd->dev);
482}
483
484static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
487 delayed_work.work);
488
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
491}
492
493static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
495{
496 struct snd_soc_pcm_runtime *rtd;
497 struct device *dev;
498 int ret;
499 int stream;
500
501 /*
502 * for rtd->dev
503 */
504 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
505 if (!dev)
506 return NULL;
507
508 dev->parent = card->dev;
509 dev->release = soc_release_rtd_dev;
510
511 dev_set_name(dev, "%s", dai_link->name);
512
513 ret = device_register(dev);
514 if (ret < 0) {
515 put_device(dev); /* soc_release_rtd_dev */
516 return NULL;
517 }
518
519 /*
520 * for rtd
521 */
522 rtd = devm_kzalloc(dev,
523 struct_size(rtd, components,
524 dai_link->num_cpus +
525 dai_link->num_codecs +
526 dai_link->num_platforms),
527 GFP_KERNEL);
528 if (!rtd) {
529 device_unregister(dev);
530 return NULL;
531 }
532
533 rtd->dev = dev;
534 INIT_LIST_HEAD(&rtd->list);
535 for_each_pcm_streams(stream) {
536 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
537 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
538 }
539 dev_set_drvdata(dev, rtd);
540 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
541
542 /*
543 * for rtd->dais
544 */
545 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
546 sizeof(struct snd_soc_dai *),
547 GFP_KERNEL);
548 if (!rtd->dais)
549 goto free_rtd;
550
551 /*
552 * dais = [][][][][][][][][][][][][][][][][][]
553 * ^cpu_dais ^codec_dais
554 * |--- num_cpus ---|--- num_codecs --|
555 * see
556 * snd_soc_rtd_to_cpu()
557 * snd_soc_rtd_to_codec()
558 */
559 rtd->card = card;
560 rtd->dai_link = dai_link;
561 rtd->id = card->num_rtd++;
562 rtd->pmdown_time = pmdown_time; /* default power off timeout */
563
564 /* see for_each_card_rtds */
565 list_add_tail(&rtd->list, &card->rtd_list);
566
567 ret = device_add_groups(dev, soc_dev_attr_groups);
568 if (ret < 0)
569 goto free_rtd;
570
571 return rtd;
572
573free_rtd:
574 soc_free_pcm_runtime(rtd);
575 return NULL;
576}
577
578static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
579{
580 struct snd_soc_dai_link *dai_link;
581 int i;
582
583 /*
584 * COMP_DUMMY() creates size 0 array on dai_link.
585 * Fill it as dummy DAI in case of CPU/Codec here.
586 * Do nothing for Platform.
587 */
588 for_each_card_prelinks(card, i, dai_link) {
589 if (dai_link->num_cpus == 0 && dai_link->cpus) {
590 dai_link->num_cpus = 1;
591 dai_link->cpus = &snd_soc_dummy_dlc;
592 }
593 if (dai_link->num_codecs == 0 && dai_link->codecs) {
594 dai_link->num_codecs = 1;
595 dai_link->codecs = &snd_soc_dummy_dlc;
596 }
597 }
598}
599
600static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
601{
602 struct snd_soc_pcm_runtime *rtd;
603
604 for_each_card_rtds(card, rtd)
605 flush_delayed_work(&rtd->delayed_work);
606}
607
608#ifdef CONFIG_PM_SLEEP
609static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
610{
611 struct snd_soc_pcm_runtime *rtd;
612 struct snd_soc_dai *dai;
613 int playback = SNDRV_PCM_STREAM_PLAYBACK;
614 int i;
615
616 for_each_card_rtds(card, rtd) {
617
618 if (rtd->dai_link->ignore_suspend)
619 continue;
620
621 for_each_rtd_dais(rtd, i, dai) {
622 if (snd_soc_dai_stream_active(dai, playback))
623 snd_soc_dai_digital_mute(dai, mute, playback);
624 }
625 }
626}
627
628static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
629{
630 struct snd_soc_pcm_runtime *rtd;
631 int stream;
632
633 for_each_card_rtds(card, rtd) {
634
635 if (rtd->dai_link->ignore_suspend)
636 continue;
637
638 for_each_pcm_streams(stream)
639 snd_soc_dapm_stream_event(rtd, stream, event);
640 }
641}
642
643/* powers down audio subsystem for suspend */
644int snd_soc_suspend(struct device *dev)
645{
646 struct snd_soc_card *card = dev_get_drvdata(dev);
647 struct snd_soc_component *component;
648 struct snd_soc_pcm_runtime *rtd;
649 int i;
650
651 /* If the card is not initialized yet there is nothing to do */
652 if (!snd_soc_card_is_instantiated(card))
653 return 0;
654
655 /*
656 * Due to the resume being scheduled into a workqueue we could
657 * suspend before that's finished - wait for it to complete.
658 */
659 snd_power_wait(card->snd_card);
660
661 /* we're going to block userspace touching us until resume completes */
662 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
663
664 /* mute any active DACs */
665 soc_playback_digital_mute(card, 1);
666
667 /* suspend all pcms */
668 for_each_card_rtds(card, rtd) {
669 if (rtd->dai_link->ignore_suspend)
670 continue;
671
672 snd_pcm_suspend_all(rtd->pcm);
673 }
674
675 snd_soc_card_suspend_pre(card);
676
677 /* close any waiting streams */
678 snd_soc_flush_all_delayed_work(card);
679
680 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
681
682 /* Recheck all endpoints too, their state is affected by suspend */
683 dapm_mark_endpoints_dirty(card);
684 snd_soc_dapm_sync(&card->dapm);
685
686 /* suspend all COMPONENTs */
687 for_each_card_rtds(card, rtd) {
688
689 if (rtd->dai_link->ignore_suspend)
690 continue;
691
692 for_each_rtd_components(rtd, i, component) {
693 struct snd_soc_dapm_context *dapm =
694 snd_soc_component_get_dapm(component);
695
696 /*
697 * ignore if component was already suspended
698 */
699 if (snd_soc_component_is_suspended(component))
700 continue;
701
702 /*
703 * If there are paths active then the COMPONENT will be
704 * held with bias _ON and should not be suspended.
705 */
706 switch (snd_soc_dapm_get_bias_level(dapm)) {
707 case SND_SOC_BIAS_STANDBY:
708 /*
709 * If the COMPONENT is capable of idle
710 * bias off then being in STANDBY
711 * means it's doing something,
712 * otherwise fall through.
713 */
714 if (dapm->idle_bias_off) {
715 dev_dbg(component->dev,
716 "ASoC: idle_bias_off CODEC on over suspend\n");
717 break;
718 }
719 fallthrough;
720
721 case SND_SOC_BIAS_OFF:
722 snd_soc_component_suspend(component);
723 if (component->regmap)
724 regcache_mark_dirty(component->regmap);
725 /* deactivate pins to sleep state */
726 pinctrl_pm_select_sleep_state(component->dev);
727 break;
728 default:
729 dev_dbg(component->dev,
730 "ASoC: COMPONENT is on over suspend\n");
731 break;
732 }
733 }
734 }
735
736 snd_soc_card_suspend_post(card);
737
738 return 0;
739}
740EXPORT_SYMBOL_GPL(snd_soc_suspend);
741
742/*
743 * deferred resume work, so resume can complete before we finished
744 * setting our codec back up, which can be very slow on I2C
745 */
746static void soc_resume_deferred(struct work_struct *work)
747{
748 struct snd_soc_card *card =
749 container_of(work, struct snd_soc_card,
750 deferred_resume_work);
751 struct snd_soc_component *component;
752
753 /*
754 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
755 * so userspace apps are blocked from touching us
756 */
757
758 dev_dbg(card->dev, "ASoC: starting resume work\n");
759
760 /* Bring us up into D2 so that DAPM starts enabling things */
761 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
762
763 snd_soc_card_resume_pre(card);
764
765 for_each_card_components(card, component) {
766 if (snd_soc_component_is_suspended(component))
767 snd_soc_component_resume(component);
768 }
769
770 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
771
772 /* unmute any active DACs */
773 soc_playback_digital_mute(card, 0);
774
775 snd_soc_card_resume_post(card);
776
777 dev_dbg(card->dev, "ASoC: resume work completed\n");
778
779 /* Recheck all endpoints too, their state is affected by suspend */
780 dapm_mark_endpoints_dirty(card);
781 snd_soc_dapm_sync(&card->dapm);
782
783 /* userspace can access us now we are back as we were before */
784 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
785}
786
787/* powers up audio subsystem after a suspend */
788int snd_soc_resume(struct device *dev)
789{
790 struct snd_soc_card *card = dev_get_drvdata(dev);
791 struct snd_soc_component *component;
792
793 /* If the card is not initialized yet there is nothing to do */
794 if (!snd_soc_card_is_instantiated(card))
795 return 0;
796
797 /* activate pins from sleep state */
798 for_each_card_components(card, component)
799 if (snd_soc_component_active(component))
800 pinctrl_pm_select_default_state(component->dev);
801
802 dev_dbg(dev, "ASoC: Scheduling resume work\n");
803 if (!schedule_work(&card->deferred_resume_work))
804 dev_err(dev, "ASoC: resume work item may be lost\n");
805
806 return 0;
807}
808EXPORT_SYMBOL_GPL(snd_soc_resume);
809
810static void soc_resume_init(struct snd_soc_card *card)
811{
812 /* deferred resume work */
813 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
814}
815#else
816#define snd_soc_suspend NULL
817#define snd_soc_resume NULL
818static inline void soc_resume_init(struct snd_soc_card *card) { }
819#endif
820
821static struct device_node
822*soc_component_to_node(struct snd_soc_component *component)
823{
824 struct device_node *of_node;
825
826 of_node = component->dev->of_node;
827 if (!of_node && component->dev->parent)
828 of_node = component->dev->parent->of_node;
829
830 return of_node;
831}
832
833struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
834 const struct of_phandle_args *args)
835{
836 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
837
838 if (!ret)
839 return NULL;
840
841 *ret = *args;
842
843 return ret;
844}
845EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
846
847static int snd_soc_is_matching_component(
848 const struct snd_soc_dai_link_component *dlc,
849 struct snd_soc_component *component)
850{
851 struct device_node *component_of_node;
852
853 if (!dlc)
854 return 0;
855
856 if (dlc->dai_args) {
857 struct snd_soc_dai *dai;
858
859 for_each_component_dais(component, dai)
860 if (snd_soc_is_matching_dai(dlc, dai))
861 return 1;
862 return 0;
863 }
864
865 component_of_node = soc_component_to_node(component);
866
867 if (dlc->of_node && component_of_node != dlc->of_node)
868 return 0;
869 if (dlc->name && strcmp(component->name, dlc->name))
870 return 0;
871
872 return 1;
873}
874
875static struct snd_soc_component *soc_find_component(
876 const struct snd_soc_dai_link_component *dlc)
877{
878 struct snd_soc_component *component;
879
880 lockdep_assert_held(&client_mutex);
881
882 /*
883 * NOTE
884 *
885 * It returns *1st* found component, but some driver
886 * has few components by same of_node/name
887 * ex)
888 * CPU component and generic DMAEngine component
889 */
890 for_each_component(component)
891 if (snd_soc_is_matching_component(dlc, component))
892 return component;
893
894 return NULL;
895}
896
897/**
898 * snd_soc_find_dai - Find a registered DAI
899 *
900 * @dlc: name of the DAI or the DAI driver and optional component info to match
901 *
902 * This function will search all registered components and their DAIs to
903 * find the DAI of the same name. The component's of_node and name
904 * should also match if being specified.
905 *
906 * Return: pointer of DAI, or NULL if not found.
907 */
908struct snd_soc_dai *snd_soc_find_dai(
909 const struct snd_soc_dai_link_component *dlc)
910{
911 struct snd_soc_component *component;
912 struct snd_soc_dai *dai;
913
914 lockdep_assert_held(&client_mutex);
915
916 /* Find CPU DAI from registered DAIs */
917 for_each_component(component)
918 if (snd_soc_is_matching_component(dlc, component))
919 for_each_component_dais(component, dai)
920 if (snd_soc_is_matching_dai(dlc, dai))
921 return dai;
922
923 return NULL;
924}
925EXPORT_SYMBOL_GPL(snd_soc_find_dai);
926
927struct snd_soc_dai *snd_soc_find_dai_with_mutex(
928 const struct snd_soc_dai_link_component *dlc)
929{
930 struct snd_soc_dai *dai;
931
932 mutex_lock(&client_mutex);
933 dai = snd_soc_find_dai(dlc);
934 mutex_unlock(&client_mutex);
935
936 return dai;
937}
938EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
939
940static int soc_dai_link_sanity_check(struct snd_soc_card *card,
941 struct snd_soc_dai_link *link)
942{
943 int i;
944 struct snd_soc_dai_link_component *dlc;
945
946 /* Codec check */
947 for_each_link_codecs(link, i, dlc) {
948 /*
949 * Codec must be specified by 1 of name or OF node,
950 * not both or neither.
951 */
952 if (snd_soc_dlc_component_is_invalid(dlc))
953 goto component_invalid;
954
955 if (snd_soc_dlc_component_is_empty(dlc))
956 goto component_empty;
957
958 /* Codec DAI name must be specified */
959 if (snd_soc_dlc_dai_is_empty(dlc))
960 goto dai_empty;
961
962 /*
963 * Defer card registration if codec component is not added to
964 * component list.
965 */
966 if (!soc_find_component(dlc))
967 goto component_not_found;
968 }
969
970 /* Platform check */
971 for_each_link_platforms(link, i, dlc) {
972 /*
973 * Platform may be specified by either name or OF node, but it
974 * can be left unspecified, then no components will be inserted
975 * in the rtdcom list
976 */
977 if (snd_soc_dlc_component_is_invalid(dlc))
978 goto component_invalid;
979
980 if (snd_soc_dlc_component_is_empty(dlc))
981 goto component_empty;
982
983 /*
984 * Defer card registration if platform component is not added to
985 * component list.
986 */
987 if (!soc_find_component(dlc))
988 goto component_not_found;
989 }
990
991 /* CPU check */
992 for_each_link_cpus(link, i, dlc) {
993 /*
994 * CPU device may be specified by either name or OF node, but
995 * can be left unspecified, and will be matched based on DAI
996 * name alone..
997 */
998 if (snd_soc_dlc_component_is_invalid(dlc))
999 goto component_invalid;
1000
1001
1002 if (snd_soc_dlc_component_is_empty(dlc)) {
1003 /*
1004 * At least one of CPU DAI name or CPU device name/node must be specified
1005 */
1006 if (snd_soc_dlc_dai_is_empty(dlc))
1007 goto component_dai_empty;
1008 } else {
1009 /*
1010 * Defer card registration if Component is not added
1011 */
1012 if (!soc_find_component(dlc))
1013 goto component_not_found;
1014 }
1015 }
1016
1017 return 0;
1018
1019component_invalid:
1020 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1021 return -EINVAL;
1022
1023component_empty:
1024 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1025 return -EINVAL;
1026
1027component_not_found:
1028 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1029 return -EPROBE_DEFER;
1030
1031dai_empty:
1032 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1033 return -EINVAL;
1034
1035component_dai_empty:
1036 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1037 return -EINVAL;
1038}
1039
1040#define MAX_DEFAULT_CH_MAP_SIZE 8
1041static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = {
1042 { .cpu = 0, .codec = 0 },
1043 { .cpu = 1, .codec = 1 },
1044 { .cpu = 2, .codec = 2 },
1045 { .cpu = 3, .codec = 3 },
1046 { .cpu = 4, .codec = 4 },
1047 { .cpu = 5, .codec = 5 },
1048 { .cpu = 6, .codec = 6 },
1049 { .cpu = 7, .codec = 7 },
1050};
1051static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = {
1052 { .cpu = 0, .codec = 0 },
1053 { .cpu = 0, .codec = 1 },
1054 { .cpu = 0, .codec = 2 },
1055 { .cpu = 0, .codec = 3 },
1056 { .cpu = 0, .codec = 4 },
1057 { .cpu = 0, .codec = 5 },
1058 { .cpu = 0, .codec = 6 },
1059 { .cpu = 0, .codec = 7 },
1060};
1061static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = {
1062 { .cpu = 0, .codec = 0 },
1063 { .cpu = 1, .codec = 0 },
1064 { .cpu = 2, .codec = 0 },
1065 { .cpu = 3, .codec = 0 },
1066 { .cpu = 4, .codec = 0 },
1067 { .cpu = 5, .codec = 0 },
1068 { .cpu = 6, .codec = 0 },
1069 { .cpu = 7, .codec = 0 },
1070};
1071static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1072 struct snd_soc_dai_link *dai_link)
1073{
1074 struct snd_soc_dai_link_ch_map *ch_maps;
1075 int i;
1076
1077 /*
1078 * dai_link->ch_maps indicates how CPU/Codec are connected.
1079 * It will be a map seen from a larger number of DAI.
1080 * see
1081 * soc.h :: [dai_link->ch_maps Image sample]
1082 */
1083
1084 /* it should have ch_maps if connection was N:M */
1085 if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 &&
1086 dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) {
1087 dev_err(card->dev, "need to have ch_maps when N:M connection (%s)",
1088 dai_link->name);
1089 return -EINVAL;
1090 }
1091
1092 /* do nothing if it has own maps */
1093 if (dai_link->ch_maps)
1094 goto sanity_check;
1095
1096 /* check default map size */
1097 if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE ||
1098 dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) {
1099 dev_err(card->dev, "soc-core.c needs update default_connection_maps");
1100 return -EINVAL;
1101 }
1102
1103 /* Compensate missing map for ... */
1104 if (dai_link->num_cpus == dai_link->num_codecs)
1105 dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */
1106 else if (dai_link->num_cpus < dai_link->num_codecs)
1107 dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */
1108 else
1109 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
1110
1111sanity_check:
1112 dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name);
1113 for_each_link_ch_maps(dai_link, i, ch_maps) {
1114 if ((ch_maps->cpu >= dai_link->num_cpus) ||
1115 (ch_maps->codec >= dai_link->num_codecs)) {
1116 dev_err(card->dev,
1117 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1118 i,
1119 ch_maps->cpu, dai_link->num_cpus,
1120 ch_maps->codec, dai_link->num_codecs);
1121 return -EINVAL;
1122 }
1123
1124 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1125 i, ch_maps->cpu, ch_maps->codec);
1126 }
1127
1128 return 0;
1129}
1130
1131/**
1132 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1133 * @card: The ASoC card to which the pcm_runtime has
1134 * @rtd: The pcm_runtime to remove
1135 *
1136 * This function removes a pcm_runtime from the ASoC card.
1137 */
1138void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1139 struct snd_soc_pcm_runtime *rtd)
1140{
1141 lockdep_assert_held(&client_mutex);
1142
1143 /*
1144 * Notify the machine driver for extra destruction
1145 */
1146 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1147
1148 soc_free_pcm_runtime(rtd);
1149}
1150EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1151
1152/**
1153 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1154 * @card: The ASoC card to which the pcm_runtime is added
1155 * @dai_link: The DAI link to find pcm_runtime
1156 *
1157 * This function adds a pcm_runtime ASoC card by using dai_link.
1158 *
1159 * Note: Topology can use this API to add pcm_runtime when probing the
1160 * topology component. And machine drivers can still define static
1161 * DAI links in dai_link array.
1162 */
1163static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1164 struct snd_soc_dai_link *dai_link)
1165{
1166 struct snd_soc_pcm_runtime *rtd;
1167 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1168 struct snd_soc_component *component;
1169 int i, id, ret;
1170
1171 lockdep_assert_held(&client_mutex);
1172
1173 /*
1174 * Notify the machine driver for extra initialization
1175 */
1176 ret = snd_soc_card_add_dai_link(card, dai_link);
1177 if (ret < 0)
1178 return ret;
1179
1180 if (dai_link->ignore)
1181 return 0;
1182
1183 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1184
1185 ret = soc_dai_link_sanity_check(card, dai_link);
1186 if (ret < 0)
1187 return ret;
1188
1189 rtd = soc_new_pcm_runtime(card, dai_link);
1190 if (!rtd)
1191 return -ENOMEM;
1192
1193 for_each_link_cpus(dai_link, i, cpu) {
1194 snd_soc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1195 if (!snd_soc_rtd_to_cpu(rtd, i)) {
1196 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1197 cpu->dai_name);
1198 goto _err_defer;
1199 }
1200 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
1201 }
1202
1203 /* Find CODEC from registered CODECs */
1204 for_each_link_codecs(dai_link, i, codec) {
1205 snd_soc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1206 if (!snd_soc_rtd_to_codec(rtd, i)) {
1207 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1208 codec->dai_name);
1209 goto _err_defer;
1210 }
1211
1212 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
1213 }
1214
1215 /* Find PLATFORM from registered PLATFORMs */
1216 for_each_link_platforms(dai_link, i, platform) {
1217 for_each_component(component) {
1218 if (!snd_soc_is_matching_component(platform, component))
1219 continue;
1220
1221 if (snd_soc_component_is_dummy(component) && component->num_dai)
1222 continue;
1223
1224 snd_soc_rtd_add_component(rtd, component);
1225 }
1226 }
1227
1228 /*
1229 * Most drivers will register their PCMs using DAI link ordering but
1230 * topology based drivers can use the DAI link id field to set PCM
1231 * device number and then use rtd + a base offset of the BEs.
1232 *
1233 * FIXME
1234 *
1235 * This should be implemented by using "dai_link" feature instead of
1236 * "component" feature.
1237 */
1238 id = rtd->id;
1239 for_each_rtd_components(rtd, i, component) {
1240 if (!component->driver->use_dai_pcm_id)
1241 continue;
1242
1243 if (rtd->dai_link->no_pcm)
1244 id += component->driver->be_pcm_base;
1245 else
1246 id = rtd->dai_link->id;
1247 }
1248 rtd->id = id;
1249
1250 return 0;
1251
1252_err_defer:
1253 snd_soc_remove_pcm_runtime(card, rtd);
1254 return -EPROBE_DEFER;
1255}
1256
1257int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1258 struct snd_soc_dai_link *dai_link,
1259 int num_dai_link)
1260{
1261 for (int i = 0; i < num_dai_link; i++) {
1262 int ret;
1263
1264 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1265 if (ret < 0)
1266 return ret;
1267
1268 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1269 if (ret < 0)
1270 return ret;
1271 }
1272
1273 return 0;
1274}
1275EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1276
1277static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1278{
1279 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1280 struct snd_soc_dai *dai, *not_used;
1281 u64 pos, possible_fmt;
1282 unsigned int mask = 0, dai_fmt = 0;
1283 int i, j, priority, pri, until;
1284
1285 /*
1286 * Get selectable format from each DAIs.
1287 *
1288 ****************************
1289 * NOTE
1290 * Using .auto_selectable_formats is not mandatory,
1291 * we can select format manually from Sound Card.
1292 * When use it, driver should list well tested format only.
1293 ****************************
1294 *
1295 * ex)
1296 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1297 * (A) (B) (C)
1298 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1299 * DAI1 : { 0xF000, 0x0F00 };
1300 * (X) (Y)
1301 *
1302 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1303 * Here is dev_dbg() message and comments
1304 *
1305 * priority = 1
1306 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1307 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1308 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1309 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1310 * priority = 2
1311 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1312 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1313 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1314 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1315 * priority = 3
1316 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1317 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1318 * found auto selected format: 0000000000000F00
1319 */
1320 until = snd_soc_dai_get_fmt_max_priority(rtd);
1321 for (priority = 1; priority <= until; priority++) {
1322 for_each_rtd_dais(rtd, j, not_used) {
1323
1324 possible_fmt = ULLONG_MAX;
1325 for_each_rtd_dais(rtd, i, dai) {
1326 u64 fmt = 0;
1327
1328 pri = (j >= i) ? priority : priority - 1;
1329 fmt = snd_soc_dai_get_fmt(dai, pri);
1330 possible_fmt &= fmt;
1331 }
1332 if (possible_fmt)
1333 goto found;
1334 }
1335 }
1336 /* Not Found */
1337 return;
1338found:
1339 /*
1340 * convert POSSIBLE_DAIFMT to DAIFMT
1341 *
1342 * Some basic/default settings on each is defined as 0.
1343 * see
1344 * SND_SOC_DAIFMT_NB_NF
1345 * SND_SOC_DAIFMT_GATED
1346 *
1347 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1348 * these value, and will be overwrite to auto selected value.
1349 *
1350 * To avoid such issue, loop from 63 to 0 here.
1351 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1352 * Basic/Default settings of each part and above are defined
1353 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1354 */
1355 for (i = 63; i >= 0; i--) {
1356 pos = 1ULL << i;
1357 switch (possible_fmt & pos) {
1358 /*
1359 * for format
1360 */
1361 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1362 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1363 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1364 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1365 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1366 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1367 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1368 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1369 break;
1370 /*
1371 * for clock
1372 */
1373 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1374 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1375 break;
1376 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1377 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1378 break;
1379 /*
1380 * for clock invert
1381 */
1382 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1383 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1384 break;
1385 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1386 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1387 break;
1388 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1389 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1390 break;
1391 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1392 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1393 break;
1394 /*
1395 * for clock provider / consumer
1396 */
1397 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1398 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1399 break;
1400 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1401 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1402 break;
1403 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1404 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1405 break;
1406 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1407 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1408 break;
1409 }
1410 }
1411
1412 /*
1413 * Some driver might have very complex limitation.
1414 * In such case, user want to auto-select non-limitation part,
1415 * and want to manually specify complex part.
1416 *
1417 * Or for example, if both CPU and Codec can be clock provider,
1418 * but because of its quality, user want to specify it manually.
1419 *
1420 * Use manually specified settings if sound card did.
1421 */
1422 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1423 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1424 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1425 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1426 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1427 mask |= SND_SOC_DAIFMT_INV_MASK;
1428 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1429 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1430
1431 dai_link->dai_fmt |= (dai_fmt & mask);
1432}
1433
1434/**
1435 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1436 * @rtd: The runtime for which the DAI link format should be changed
1437 * @dai_fmt: The new DAI link format
1438 *
1439 * This function updates the DAI link format for all DAIs connected to the DAI
1440 * link for the specified runtime.
1441 *
1442 * Note: For setups with a static format set the dai_fmt field in the
1443 * corresponding snd_dai_link struct instead of using this function.
1444 *
1445 * Returns 0 on success, otherwise a negative error code.
1446 */
1447int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1448 unsigned int dai_fmt)
1449{
1450 struct snd_soc_dai *cpu_dai;
1451 struct snd_soc_dai *codec_dai;
1452 unsigned int i;
1453 int ret;
1454
1455 if (!dai_fmt)
1456 return 0;
1457
1458 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1459 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1460 if (ret != 0 && ret != -ENOTSUPP)
1461 return ret;
1462 }
1463
1464 /* Flip the polarity for the "CPU" end of link */
1465 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1466
1467 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1468 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1469 if (ret != 0 && ret != -ENOTSUPP)
1470 return ret;
1471 }
1472
1473 return 0;
1474}
1475EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1476
1477static int soc_init_pcm_runtime(struct snd_soc_card *card,
1478 struct snd_soc_pcm_runtime *rtd)
1479{
1480 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1481 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1482 int ret;
1483
1484 /* do machine specific initialization */
1485 ret = snd_soc_link_init(rtd);
1486 if (ret < 0)
1487 return ret;
1488
1489 snd_soc_runtime_get_dai_fmt(rtd);
1490 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1491 if (ret)
1492 goto err;
1493
1494 /* add DPCM sysfs entries */
1495 soc_dpcm_debugfs_add(rtd);
1496
1497 /* create compress_device if possible */
1498 ret = snd_soc_dai_compress_new(cpu_dai, rtd);
1499 if (ret != -ENOTSUPP)
1500 goto err;
1501
1502 /* create the pcm */
1503 ret = soc_new_pcm(rtd);
1504 if (ret < 0) {
1505 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1506 dai_link->stream_name, ret);
1507 goto err;
1508 }
1509
1510 ret = snd_soc_pcm_dai_new(rtd);
1511 if (ret < 0)
1512 goto err;
1513
1514 rtd->initialized = true;
1515
1516 return 0;
1517err:
1518 snd_soc_link_exit(rtd);
1519 return ret;
1520}
1521
1522static void soc_set_name_prefix(struct snd_soc_card *card,
1523 struct snd_soc_component *component)
1524{
1525 struct device_node *of_node = soc_component_to_node(component);
1526 const char *str;
1527 int ret, i;
1528
1529 for (i = 0; i < card->num_configs; i++) {
1530 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1531
1532 if (snd_soc_is_matching_component(&map->dlc, component) &&
1533 map->name_prefix) {
1534 component->name_prefix = map->name_prefix;
1535 return;
1536 }
1537 }
1538
1539 /*
1540 * If there is no configuration table or no match in the table,
1541 * check if a prefix is provided in the node
1542 */
1543 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1544 if (ret < 0)
1545 return;
1546
1547 component->name_prefix = str;
1548}
1549
1550static void soc_remove_component(struct snd_soc_component *component,
1551 int probed)
1552{
1553
1554 if (!component->card)
1555 return;
1556
1557 if (probed)
1558 snd_soc_component_remove(component);
1559
1560 list_del_init(&component->card_list);
1561 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1562 soc_cleanup_component_debugfs(component);
1563 component->card = NULL;
1564 snd_soc_component_module_put_when_remove(component);
1565}
1566
1567static int soc_probe_component(struct snd_soc_card *card,
1568 struct snd_soc_component *component)
1569{
1570 struct snd_soc_dapm_context *dapm =
1571 snd_soc_component_get_dapm(component);
1572 struct snd_soc_dai *dai;
1573 int probed = 0;
1574 int ret;
1575
1576 if (snd_soc_component_is_dummy(component))
1577 return 0;
1578
1579 if (component->card) {
1580 if (component->card != card) {
1581 dev_err(component->dev,
1582 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1583 component->name, card->name, component->card->name);
1584 return -ENODEV;
1585 }
1586 return 0;
1587 }
1588
1589 ret = snd_soc_component_module_get_when_probe(component);
1590 if (ret < 0)
1591 return ret;
1592
1593 component->card = card;
1594 soc_set_name_prefix(card, component);
1595
1596 soc_init_component_debugfs(component);
1597
1598 snd_soc_dapm_init(dapm, card, component);
1599
1600 ret = snd_soc_dapm_new_controls(dapm,
1601 component->driver->dapm_widgets,
1602 component->driver->num_dapm_widgets);
1603
1604 if (ret != 0) {
1605 dev_err(component->dev,
1606 "Failed to create new controls %d\n", ret);
1607 goto err_probe;
1608 }
1609
1610 for_each_component_dais(component, dai) {
1611 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1612 if (ret != 0) {
1613 dev_err(component->dev,
1614 "Failed to create DAI widgets %d\n", ret);
1615 goto err_probe;
1616 }
1617 }
1618
1619 ret = snd_soc_component_probe(component);
1620 if (ret < 0)
1621 goto err_probe;
1622
1623 WARN(dapm->idle_bias_off &&
1624 dapm->bias_level != SND_SOC_BIAS_OFF,
1625 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1626 component->name);
1627 probed = 1;
1628
1629 /*
1630 * machine specific init
1631 * see
1632 * snd_soc_component_set_aux()
1633 */
1634 ret = snd_soc_component_init(component);
1635 if (ret < 0)
1636 goto err_probe;
1637
1638 ret = snd_soc_add_component_controls(component,
1639 component->driver->controls,
1640 component->driver->num_controls);
1641 if (ret < 0)
1642 goto err_probe;
1643
1644 ret = snd_soc_dapm_add_routes(dapm,
1645 component->driver->dapm_routes,
1646 component->driver->num_dapm_routes);
1647 if (ret < 0) {
1648 if (card->disable_route_checks) {
1649 dev_info(card->dev,
1650 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1651 __func__);
1652 } else {
1653 dev_err(card->dev,
1654 "%s: snd_soc_dapm_add_routes failed: %d\n",
1655 __func__, ret);
1656 goto err_probe;
1657 }
1658 }
1659
1660 /* see for_each_card_components */
1661 list_add(&component->card_list, &card->component_dev_list);
1662
1663err_probe:
1664 if (ret < 0)
1665 soc_remove_component(component, probed);
1666
1667 return ret;
1668}
1669
1670static void soc_remove_link_dais(struct snd_soc_card *card)
1671{
1672 struct snd_soc_pcm_runtime *rtd;
1673 int order;
1674
1675 for_each_comp_order(order) {
1676 for_each_card_rtds(card, rtd) {
1677 /* remove all rtd connected DAIs in good order */
1678 snd_soc_pcm_dai_remove(rtd, order);
1679 }
1680 }
1681}
1682
1683static int soc_probe_link_dais(struct snd_soc_card *card)
1684{
1685 struct snd_soc_pcm_runtime *rtd;
1686 int order, ret;
1687
1688 for_each_comp_order(order) {
1689 for_each_card_rtds(card, rtd) {
1690 /* probe all rtd connected DAIs in good order */
1691 ret = snd_soc_pcm_dai_probe(rtd, order);
1692 if (ret)
1693 return ret;
1694 }
1695 }
1696
1697 return 0;
1698}
1699
1700static void soc_remove_link_components(struct snd_soc_card *card)
1701{
1702 struct snd_soc_component *component;
1703 struct snd_soc_pcm_runtime *rtd;
1704 int i, order;
1705
1706 for_each_comp_order(order) {
1707 for_each_card_rtds(card, rtd) {
1708 for_each_rtd_components(rtd, i, component) {
1709 if (component->driver->remove_order != order)
1710 continue;
1711
1712 soc_remove_component(component, 1);
1713 }
1714 }
1715 }
1716}
1717
1718static int soc_probe_link_components(struct snd_soc_card *card)
1719{
1720 struct snd_soc_component *component;
1721 struct snd_soc_pcm_runtime *rtd;
1722 int i, ret, order;
1723
1724 for_each_comp_order(order) {
1725 for_each_card_rtds(card, rtd) {
1726 for_each_rtd_components(rtd, i, component) {
1727 if (component->driver->probe_order != order)
1728 continue;
1729
1730 ret = soc_probe_component(card, component);
1731 if (ret < 0)
1732 return ret;
1733 }
1734 }
1735 }
1736
1737 return 0;
1738}
1739
1740static void soc_unbind_aux_dev(struct snd_soc_card *card)
1741{
1742 struct snd_soc_component *component, *_component;
1743
1744 for_each_card_auxs_safe(card, component, _component) {
1745 /* for snd_soc_component_init() */
1746 snd_soc_component_set_aux(component, NULL);
1747 list_del(&component->card_aux_list);
1748 }
1749}
1750
1751static int soc_bind_aux_dev(struct snd_soc_card *card)
1752{
1753 struct snd_soc_component *component;
1754 struct snd_soc_aux_dev *aux;
1755 int i;
1756
1757 for_each_card_pre_auxs(card, i, aux) {
1758 /* codecs, usually analog devices */
1759 component = soc_find_component(&aux->dlc);
1760 if (!component)
1761 return -EPROBE_DEFER;
1762
1763 /* for snd_soc_component_init() */
1764 snd_soc_component_set_aux(component, aux);
1765 /* see for_each_card_auxs */
1766 list_add(&component->card_aux_list, &card->aux_comp_list);
1767 }
1768 return 0;
1769}
1770
1771static int soc_probe_aux_devices(struct snd_soc_card *card)
1772{
1773 struct snd_soc_component *component;
1774 int order;
1775 int ret;
1776
1777 for_each_comp_order(order) {
1778 for_each_card_auxs(card, component) {
1779 if (component->driver->probe_order != order)
1780 continue;
1781
1782 ret = soc_probe_component(card, component);
1783 if (ret < 0)
1784 return ret;
1785 }
1786 }
1787
1788 return 0;
1789}
1790
1791static void soc_remove_aux_devices(struct snd_soc_card *card)
1792{
1793 struct snd_soc_component *comp, *_comp;
1794 int order;
1795
1796 for_each_comp_order(order) {
1797 for_each_card_auxs_safe(card, comp, _comp) {
1798 if (comp->driver->remove_order == order)
1799 soc_remove_component(comp, 1);
1800 }
1801 }
1802}
1803
1804#ifdef CONFIG_DMI
1805/*
1806 * If a DMI filed contain strings in this blacklist (e.g.
1807 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1808 * as invalid and dropped when setting the card long name from DMI info.
1809 */
1810static const char * const dmi_blacklist[] = {
1811 "To be filled by OEM",
1812 "TBD by OEM",
1813 "Default String",
1814 "Board Manufacturer",
1815 "Board Vendor Name",
1816 "Board Product Name",
1817 NULL, /* terminator */
1818};
1819
1820/*
1821 * Trim special characters, and replace '-' with '_' since '-' is used to
1822 * separate different DMI fields in the card long name. Only number and
1823 * alphabet characters and a few separator characters are kept.
1824 */
1825static void cleanup_dmi_name(char *name)
1826{
1827 int i, j = 0;
1828
1829 for (i = 0; name[i]; i++) {
1830 if (isalnum(name[i]) || (name[i] == '.')
1831 || (name[i] == '_'))
1832 name[j++] = name[i];
1833 else if (name[i] == '-')
1834 name[j++] = '_';
1835 }
1836
1837 name[j] = '\0';
1838}
1839
1840/*
1841 * Check if a DMI field is valid, i.e. not containing any string
1842 * in the black list.
1843 */
1844static int is_dmi_valid(const char *field)
1845{
1846 int i = 0;
1847
1848 while (dmi_blacklist[i]) {
1849 if (strstr(field, dmi_blacklist[i]))
1850 return 0;
1851 i++;
1852 }
1853
1854 return 1;
1855}
1856
1857/*
1858 * Append a string to card->dmi_longname with character cleanups.
1859 */
1860static void append_dmi_string(struct snd_soc_card *card, const char *str)
1861{
1862 char *dst = card->dmi_longname;
1863 size_t dst_len = sizeof(card->dmi_longname);
1864 size_t len;
1865
1866 len = strlen(dst);
1867 snprintf(dst + len, dst_len - len, "-%s", str);
1868
1869 len++; /* skip the separator "-" */
1870 if (len < dst_len)
1871 cleanup_dmi_name(dst + len);
1872}
1873
1874/**
1875 * snd_soc_set_dmi_name() - Register DMI names to card
1876 * @card: The card to register DMI names
1877 * @flavour: The flavour "differentiator" for the card amongst its peers.
1878 *
1879 * An Intel machine driver may be used by many different devices but are
1880 * difficult for userspace to differentiate, since machine drivers usually
1881 * use their own name as the card short name and leave the card long name
1882 * blank. To differentiate such devices and fix bugs due to lack of
1883 * device-specific configurations, this function allows DMI info to be used
1884 * as the sound card long name, in the format of
1885 * "vendor-product-version-board"
1886 * (Character '-' is used to separate different DMI fields here).
1887 * This will help the user space to load the device-specific Use Case Manager
1888 * (UCM) configurations for the card.
1889 *
1890 * Possible card long names may be:
1891 * DellInc.-XPS139343-01-0310JH
1892 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1893 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1894 *
1895 * This function also supports flavoring the card longname to provide
1896 * the extra differentiation, like "vendor-product-version-board-flavor".
1897 *
1898 * We only keep number and alphabet characters and a few separator characters
1899 * in the card long name since UCM in the user space uses the card long names
1900 * as card configuration directory names and AudoConf cannot support special
1901 * characters like SPACE.
1902 *
1903 * Returns 0 on success, otherwise a negative error code.
1904 */
1905int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1906{
1907 const char *vendor, *product, *board;
1908
1909 if (card->long_name)
1910 return 0; /* long name already set by driver or from DMI */
1911
1912 if (!dmi_available)
1913 return 0;
1914
1915 /* make up dmi long name as: vendor-product-version-board */
1916 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1917 if (!vendor || !is_dmi_valid(vendor)) {
1918 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1919 return 0;
1920 }
1921
1922 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1923 cleanup_dmi_name(card->dmi_longname);
1924
1925 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1926 if (product && is_dmi_valid(product)) {
1927 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1928
1929 append_dmi_string(card, product);
1930
1931 /*
1932 * some vendors like Lenovo may only put a self-explanatory
1933 * name in the product version field
1934 */
1935 if (product_version && is_dmi_valid(product_version))
1936 append_dmi_string(card, product_version);
1937 }
1938
1939 board = dmi_get_system_info(DMI_BOARD_NAME);
1940 if (board && is_dmi_valid(board)) {
1941 if (!product || strcasecmp(board, product))
1942 append_dmi_string(card, board);
1943 } else if (!product) {
1944 /* fall back to using legacy name */
1945 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1946 return 0;
1947 }
1948
1949 /* Add flavour to dmi long name */
1950 if (flavour)
1951 append_dmi_string(card, flavour);
1952
1953 /* set the card long name */
1954 card->long_name = card->dmi_longname;
1955
1956 return 0;
1957}
1958EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1959#endif /* CONFIG_DMI */
1960
1961static void soc_check_tplg_fes(struct snd_soc_card *card)
1962{
1963 struct snd_soc_component *component;
1964 const struct snd_soc_component_driver *comp_drv;
1965 struct snd_soc_dai_link *dai_link;
1966 int i;
1967
1968 for_each_component(component) {
1969
1970 /* does this component override BEs ? */
1971 if (!component->driver->ignore_machine)
1972 continue;
1973
1974 /* for this machine ? */
1975 if (!strcmp(component->driver->ignore_machine,
1976 card->dev->driver->name))
1977 goto match;
1978 if (strcmp(component->driver->ignore_machine,
1979 dev_name(card->dev)))
1980 continue;
1981match:
1982 /* machine matches, so override the rtd data */
1983 for_each_card_prelinks(card, i, dai_link) {
1984
1985 /* ignore this FE */
1986 if (dai_link->dynamic) {
1987 dai_link->ignore = true;
1988 continue;
1989 }
1990
1991 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1992 card->dai_link[i].name);
1993
1994 /* override platform component */
1995 if (!dai_link->platforms) {
1996 dev_err(card->dev, "init platform error");
1997 continue;
1998 }
1999
2000 if (component->dev->of_node)
2001 dai_link->platforms->of_node = component->dev->of_node;
2002 else
2003 dai_link->platforms->name = component->name;
2004
2005 /* convert non BE into BE */
2006 dai_link->no_pcm = 1;
2007
2008 /*
2009 * override any BE fixups
2010 * see
2011 * snd_soc_link_be_hw_params_fixup()
2012 */
2013 dai_link->be_hw_params_fixup =
2014 component->driver->be_hw_params_fixup;
2015
2016 /*
2017 * most BE links don't set stream name, so set it to
2018 * dai link name if it's NULL to help bind widgets.
2019 */
2020 if (!dai_link->stream_name)
2021 dai_link->stream_name = dai_link->name;
2022 }
2023
2024 /* Inform userspace we are using alternate topology */
2025 if (component->driver->topology_name_prefix) {
2026
2027 /* topology shortname created? */
2028 if (!card->topology_shortname_created) {
2029 comp_drv = component->driver;
2030
2031 snprintf(card->topology_shortname, 32, "%s-%s",
2032 comp_drv->topology_name_prefix,
2033 card->name);
2034 card->topology_shortname_created = true;
2035 }
2036
2037 /* use topology shortname */
2038 card->name = card->topology_shortname;
2039 }
2040 }
2041}
2042
2043#define soc_setup_card_name(card, name, name1, name2) \
2044 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2045static void __soc_setup_card_name(struct snd_soc_card *card,
2046 char *name, int len,
2047 const char *name1, const char *name2)
2048{
2049 const char *src = name1 ? name1 : name2;
2050 int i;
2051
2052 snprintf(name, len, "%s", src);
2053
2054 if (name != card->snd_card->driver)
2055 return;
2056
2057 /*
2058 * Name normalization (driver field)
2059 *
2060 * The driver name is somewhat special, as it's used as a key for
2061 * searches in the user-space.
2062 *
2063 * ex)
2064 * "abcd??efg" -> "abcd__efg"
2065 */
2066 for (i = 0; i < len; i++) {
2067 switch (name[i]) {
2068 case '_':
2069 case '-':
2070 case '\0':
2071 break;
2072 default:
2073 if (!isalnum(name[i]))
2074 name[i] = '_';
2075 break;
2076 }
2077 }
2078
2079 /*
2080 * The driver field should contain a valid string from the user view.
2081 * The wrapping usually does not work so well here. Set a smaller string
2082 * in the specific ASoC driver.
2083 */
2084 if (strlen(src) > len - 1)
2085 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2086}
2087
2088static void soc_cleanup_card_resources(struct snd_soc_card *card)
2089{
2090 struct snd_soc_pcm_runtime *rtd, *n;
2091
2092 if (card->snd_card)
2093 snd_card_disconnect_sync(card->snd_card);
2094
2095 snd_soc_dapm_shutdown(card);
2096
2097 /* release machine specific resources */
2098 for_each_card_rtds(card, rtd)
2099 if (rtd->initialized)
2100 snd_soc_link_exit(rtd);
2101 /* remove and free each DAI */
2102 soc_remove_link_dais(card);
2103 soc_remove_link_components(card);
2104
2105 for_each_card_rtds_safe(card, rtd, n)
2106 snd_soc_remove_pcm_runtime(card, rtd);
2107
2108 /* remove auxiliary devices */
2109 soc_remove_aux_devices(card);
2110 soc_unbind_aux_dev(card);
2111
2112 snd_soc_dapm_free(&card->dapm);
2113 soc_cleanup_card_debugfs(card);
2114
2115 /* remove the card */
2116 snd_soc_card_remove(card);
2117
2118 if (card->snd_card) {
2119 snd_card_free(card->snd_card);
2120 card->snd_card = NULL;
2121 }
2122}
2123
2124static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2125{
2126 if (snd_soc_card_is_instantiated(card)) {
2127 card->instantiated = false;
2128 snd_soc_flush_all_delayed_work(card);
2129
2130 soc_cleanup_card_resources(card);
2131 if (!unregister)
2132 list_add(&card->list, &unbind_card_list);
2133 } else {
2134 if (unregister)
2135 list_del(&card->list);
2136 }
2137}
2138
2139static int snd_soc_bind_card(struct snd_soc_card *card)
2140{
2141 struct snd_soc_pcm_runtime *rtd;
2142 struct snd_soc_component *component;
2143 int ret;
2144
2145 mutex_lock(&client_mutex);
2146 snd_soc_card_mutex_lock_root(card);
2147
2148 snd_soc_fill_dummy_dai(card);
2149
2150 snd_soc_dapm_init(&card->dapm, card, NULL);
2151
2152 /* check whether any platform is ignore machine FE and using topology */
2153 soc_check_tplg_fes(card);
2154
2155 /* bind aux_devs too */
2156 ret = soc_bind_aux_dev(card);
2157 if (ret < 0)
2158 goto probe_end;
2159
2160 /* add predefined DAI links to the list */
2161 card->num_rtd = 0;
2162 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2163 if (ret < 0)
2164 goto probe_end;
2165
2166 /* card bind complete so register a sound card */
2167 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2168 card->owner, 0, &card->snd_card);
2169 if (ret < 0) {
2170 dev_err(card->dev,
2171 "ASoC: can't create sound card for card %s: %d\n",
2172 card->name, ret);
2173 goto probe_end;
2174 }
2175
2176 soc_init_card_debugfs(card);
2177
2178 soc_resume_init(card);
2179
2180 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2181 card->num_dapm_widgets);
2182 if (ret < 0)
2183 goto probe_end;
2184
2185 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2186 card->num_of_dapm_widgets);
2187 if (ret < 0)
2188 goto probe_end;
2189
2190 /* initialise the sound card only once */
2191 ret = snd_soc_card_probe(card);
2192 if (ret < 0)
2193 goto probe_end;
2194
2195 /* probe all components used by DAI links on this card */
2196 ret = soc_probe_link_components(card);
2197 if (ret < 0) {
2198 if (ret != -EPROBE_DEFER) {
2199 dev_err(card->dev,
2200 "ASoC: failed to instantiate card %d\n", ret);
2201 }
2202 goto probe_end;
2203 }
2204
2205 /* probe auxiliary components */
2206 ret = soc_probe_aux_devices(card);
2207 if (ret < 0) {
2208 dev_err(card->dev,
2209 "ASoC: failed to probe aux component %d\n", ret);
2210 goto probe_end;
2211 }
2212
2213 /* probe all DAI links on this card */
2214 ret = soc_probe_link_dais(card);
2215 if (ret < 0) {
2216 dev_err(card->dev,
2217 "ASoC: failed to instantiate card %d\n", ret);
2218 goto probe_end;
2219 }
2220
2221 for_each_card_rtds(card, rtd) {
2222 ret = soc_init_pcm_runtime(card, rtd);
2223 if (ret < 0)
2224 goto probe_end;
2225 }
2226
2227 snd_soc_dapm_link_dai_widgets(card);
2228 snd_soc_dapm_connect_dai_link_widgets(card);
2229
2230 ret = snd_soc_add_card_controls(card, card->controls,
2231 card->num_controls);
2232 if (ret < 0)
2233 goto probe_end;
2234
2235 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2236 card->num_dapm_routes);
2237 if (ret < 0) {
2238 if (card->disable_route_checks) {
2239 dev_info(card->dev,
2240 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2241 __func__);
2242 } else {
2243 dev_err(card->dev,
2244 "%s: snd_soc_dapm_add_routes failed: %d\n",
2245 __func__, ret);
2246 goto probe_end;
2247 }
2248 }
2249
2250 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2251 card->num_of_dapm_routes);
2252 if (ret < 0)
2253 goto probe_end;
2254
2255 /* try to set some sane longname if DMI is available */
2256 snd_soc_set_dmi_name(card, NULL);
2257
2258 soc_setup_card_name(card, card->snd_card->shortname,
2259 card->name, NULL);
2260 soc_setup_card_name(card, card->snd_card->longname,
2261 card->long_name, card->name);
2262 soc_setup_card_name(card, card->snd_card->driver,
2263 card->driver_name, card->name);
2264
2265 if (card->components) {
2266 /* the current implementation of snd_component_add() accepts */
2267 /* multiple components in the string separated by space, */
2268 /* but the string collision (identical string) check might */
2269 /* not work correctly */
2270 ret = snd_component_add(card->snd_card, card->components);
2271 if (ret < 0) {
2272 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2273 card->name, ret);
2274 goto probe_end;
2275 }
2276 }
2277
2278 ret = snd_soc_card_late_probe(card);
2279 if (ret < 0)
2280 goto probe_end;
2281
2282 snd_soc_dapm_new_widgets(card);
2283 snd_soc_card_fixup_controls(card);
2284
2285 ret = snd_card_register(card->snd_card);
2286 if (ret < 0) {
2287 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2288 ret);
2289 goto probe_end;
2290 }
2291
2292 card->instantiated = 1;
2293 dapm_mark_endpoints_dirty(card);
2294 snd_soc_dapm_sync(&card->dapm);
2295
2296 /* deactivate pins to sleep state */
2297 for_each_card_components(card, component)
2298 if (!snd_soc_component_active(component))
2299 pinctrl_pm_select_sleep_state(component->dev);
2300
2301probe_end:
2302 if (ret < 0)
2303 soc_cleanup_card_resources(card);
2304
2305 snd_soc_card_mutex_unlock(card);
2306 mutex_unlock(&client_mutex);
2307
2308 return ret;
2309}
2310
2311/* probes a new socdev */
2312static int soc_probe(struct platform_device *pdev)
2313{
2314 struct snd_soc_card *card = platform_get_drvdata(pdev);
2315
2316 /*
2317 * no card, so machine driver should be registering card
2318 * we should not be here in that case so ret error
2319 */
2320 if (!card)
2321 return -EINVAL;
2322
2323 dev_warn(&pdev->dev,
2324 "ASoC: machine %s should use snd_soc_register_card()\n",
2325 card->name);
2326
2327 /* Bodge while we unpick instantiation */
2328 card->dev = &pdev->dev;
2329
2330 return devm_snd_soc_register_card(&pdev->dev, card);
2331}
2332
2333int snd_soc_poweroff(struct device *dev)
2334{
2335 struct snd_soc_card *card = dev_get_drvdata(dev);
2336 struct snd_soc_component *component;
2337
2338 if (!snd_soc_card_is_instantiated(card))
2339 return 0;
2340
2341 /*
2342 * Flush out pmdown_time work - we actually do want to run it
2343 * now, we're shutting down so no imminent restart.
2344 */
2345 snd_soc_flush_all_delayed_work(card);
2346
2347 snd_soc_dapm_shutdown(card);
2348
2349 /* deactivate pins to sleep state */
2350 for_each_card_components(card, component)
2351 pinctrl_pm_select_sleep_state(component->dev);
2352
2353 return 0;
2354}
2355EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2356
2357const struct dev_pm_ops snd_soc_pm_ops = {
2358 .suspend = snd_soc_suspend,
2359 .resume = snd_soc_resume,
2360 .freeze = snd_soc_suspend,
2361 .thaw = snd_soc_resume,
2362 .poweroff = snd_soc_poweroff,
2363 .restore = snd_soc_resume,
2364};
2365EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2366
2367/* ASoC platform driver */
2368static struct platform_driver soc_driver = {
2369 .driver = {
2370 .name = "soc-audio",
2371 .pm = &snd_soc_pm_ops,
2372 },
2373 .probe = soc_probe,
2374};
2375
2376/**
2377 * snd_soc_cnew - create new control
2378 * @_template: control template
2379 * @data: control private data
2380 * @long_name: control long name
2381 * @prefix: control name prefix
2382 *
2383 * Create a new mixer control from a template control.
2384 *
2385 * Returns 0 for success, else error.
2386 */
2387struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2388 void *data, const char *long_name,
2389 const char *prefix)
2390{
2391 struct snd_kcontrol_new template;
2392 struct snd_kcontrol *kcontrol;
2393 char *name = NULL;
2394
2395 memcpy(&template, _template, sizeof(template));
2396 template.index = 0;
2397
2398 if (!long_name)
2399 long_name = template.name;
2400
2401 if (prefix) {
2402 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2403 if (!name)
2404 return NULL;
2405
2406 template.name = name;
2407 } else {
2408 template.name = long_name;
2409 }
2410
2411 kcontrol = snd_ctl_new1(&template, data);
2412
2413 kfree(name);
2414
2415 return kcontrol;
2416}
2417EXPORT_SYMBOL_GPL(snd_soc_cnew);
2418
2419static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2420 const struct snd_kcontrol_new *controls, int num_controls,
2421 const char *prefix, void *data)
2422{
2423 int i;
2424
2425 for (i = 0; i < num_controls; i++) {
2426 const struct snd_kcontrol_new *control = &controls[i];
2427 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2428 control->name, prefix));
2429 if (err < 0) {
2430 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2431 control->name, err);
2432 return err;
2433 }
2434 }
2435
2436 return 0;
2437}
2438
2439/**
2440 * snd_soc_add_component_controls - Add an array of controls to a component.
2441 *
2442 * @component: Component to add controls to
2443 * @controls: Array of controls to add
2444 * @num_controls: Number of elements in the array
2445 *
2446 * Return: 0 for success, else error.
2447 */
2448int snd_soc_add_component_controls(struct snd_soc_component *component,
2449 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2450{
2451 struct snd_card *card = component->card->snd_card;
2452
2453 return snd_soc_add_controls(card, component->dev, controls,
2454 num_controls, component->name_prefix, component);
2455}
2456EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2457
2458/**
2459 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2460 * Convenience function to add a list of controls.
2461 *
2462 * @soc_card: SoC card to add controls to
2463 * @controls: array of controls to add
2464 * @num_controls: number of elements in the array
2465 *
2466 * Return 0 for success, else error.
2467 */
2468int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2469 const struct snd_kcontrol_new *controls, int num_controls)
2470{
2471 struct snd_card *card = soc_card->snd_card;
2472
2473 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2474 NULL, soc_card);
2475}
2476EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2477
2478/**
2479 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2480 * Convenience function to add a list of controls.
2481 *
2482 * @dai: DAI to add controls to
2483 * @controls: array of controls to add
2484 * @num_controls: number of elements in the array
2485 *
2486 * Return 0 for success, else error.
2487 */
2488int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2489 const struct snd_kcontrol_new *controls, int num_controls)
2490{
2491 struct snd_card *card = dai->component->card->snd_card;
2492
2493 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2494 NULL, dai);
2495}
2496EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2497
2498/**
2499 * snd_soc_register_card - Register a card with the ASoC core
2500 *
2501 * @card: Card to register
2502 *
2503 */
2504int snd_soc_register_card(struct snd_soc_card *card)
2505{
2506 if (!card->name || !card->dev)
2507 return -EINVAL;
2508
2509 dev_set_drvdata(card->dev, card);
2510
2511 INIT_LIST_HEAD(&card->widgets);
2512 INIT_LIST_HEAD(&card->paths);
2513 INIT_LIST_HEAD(&card->dapm_list);
2514 INIT_LIST_HEAD(&card->aux_comp_list);
2515 INIT_LIST_HEAD(&card->component_dev_list);
2516 INIT_LIST_HEAD(&card->list);
2517 INIT_LIST_HEAD(&card->rtd_list);
2518 INIT_LIST_HEAD(&card->dapm_dirty);
2519 INIT_LIST_HEAD(&card->dobj_list);
2520
2521 card->instantiated = 0;
2522 mutex_init(&card->mutex);
2523 mutex_init(&card->dapm_mutex);
2524 mutex_init(&card->pcm_mutex);
2525
2526 return snd_soc_bind_card(card);
2527}
2528EXPORT_SYMBOL_GPL(snd_soc_register_card);
2529
2530/**
2531 * snd_soc_unregister_card - Unregister a card with the ASoC core
2532 *
2533 * @card: Card to unregister
2534 *
2535 */
2536void snd_soc_unregister_card(struct snd_soc_card *card)
2537{
2538 mutex_lock(&client_mutex);
2539 snd_soc_unbind_card(card, true);
2540 mutex_unlock(&client_mutex);
2541 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2542}
2543EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2544
2545/*
2546 * Simplify DAI link configuration by removing ".-1" from device names
2547 * and sanitizing names.
2548 */
2549static char *fmt_single_name(struct device *dev, int *id)
2550{
2551 const char *devname = dev_name(dev);
2552 char *found, *name;
2553 unsigned int id1, id2;
2554
2555 if (devname == NULL)
2556 return NULL;
2557
2558 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2559 if (!name)
2560 return NULL;
2561
2562 /* are we a "%s.%d" name (platform and SPI components) */
2563 found = strstr(name, dev->driver->name);
2564 if (found) {
2565 /* get ID */
2566 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2567
2568 /* discard ID from name if ID == -1 */
2569 if (*id == -1)
2570 found[strlen(dev->driver->name)] = '\0';
2571 }
2572
2573 /* I2C component devices are named "bus-addr" */
2574 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2575
2576 /* create unique ID number from I2C addr and bus */
2577 *id = ((id1 & 0xffff) << 16) + id2;
2578
2579 devm_kfree(dev, name);
2580
2581 /* sanitize component name for DAI link creation */
2582 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2583 } else {
2584 *id = 0;
2585 }
2586
2587 return name;
2588}
2589
2590/*
2591 * Simplify DAI link naming for single devices with multiple DAIs by removing
2592 * any ".-1" and using the DAI name (instead of device name).
2593 */
2594static inline char *fmt_multiple_name(struct device *dev,
2595 struct snd_soc_dai_driver *dai_drv)
2596{
2597 if (dai_drv->name == NULL) {
2598 dev_err(dev,
2599 "ASoC: error - multiple DAI %s registered with no name\n",
2600 dev_name(dev));
2601 return NULL;
2602 }
2603
2604 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2605}
2606
2607void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2608{
2609 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2610 list_del(&dai->list);
2611}
2612EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2613
2614/**
2615 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2616 *
2617 * @component: The component the DAIs are registered for
2618 * @dai_drv: DAI driver to use for the DAI
2619 * @legacy_dai_naming: if %true, use legacy single-name format;
2620 * if %false, use multiple-name format;
2621 *
2622 * Topology can use this API to register DAIs when probing a component.
2623 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2624 * will be freed in the component cleanup.
2625 */
2626struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2627 struct snd_soc_dai_driver *dai_drv,
2628 bool legacy_dai_naming)
2629{
2630 struct device *dev = component->dev;
2631 struct snd_soc_dai *dai;
2632
2633 lockdep_assert_held(&client_mutex);
2634
2635 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2636 if (dai == NULL)
2637 return NULL;
2638
2639 /*
2640 * Back in the old days when we still had component-less DAIs,
2641 * instead of having a static name, component-less DAIs would
2642 * inherit the name of the parent device so it is possible to
2643 * register multiple instances of the DAI. We still need to keep
2644 * the same naming style even though those DAIs are not
2645 * component-less anymore.
2646 */
2647 if (legacy_dai_naming &&
2648 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2649 dai->name = fmt_single_name(dev, &dai->id);
2650 } else {
2651 dai->name = fmt_multiple_name(dev, dai_drv);
2652 if (dai_drv->id)
2653 dai->id = dai_drv->id;
2654 else
2655 dai->id = component->num_dai;
2656 }
2657 if (!dai->name)
2658 return NULL;
2659
2660 dai->component = component;
2661 dai->dev = dev;
2662 dai->driver = dai_drv;
2663
2664 /* see for_each_component_dais */
2665 list_add_tail(&dai->list, &component->dai_list);
2666 component->num_dai++;
2667
2668 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2669 return dai;
2670}
2671EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2672
2673/**
2674 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2675 *
2676 * @component: The component for which the DAIs should be unregistered
2677 */
2678static void snd_soc_unregister_dais(struct snd_soc_component *component)
2679{
2680 struct snd_soc_dai *dai, *_dai;
2681
2682 for_each_component_dais_safe(component, dai, _dai)
2683 snd_soc_unregister_dai(dai);
2684}
2685
2686/**
2687 * snd_soc_register_dais - Register a DAI with the ASoC core
2688 *
2689 * @component: The component the DAIs are registered for
2690 * @dai_drv: DAI driver to use for the DAIs
2691 * @count: Number of DAIs
2692 */
2693static int snd_soc_register_dais(struct snd_soc_component *component,
2694 struct snd_soc_dai_driver *dai_drv,
2695 size_t count)
2696{
2697 struct snd_soc_dai *dai;
2698 unsigned int i;
2699 int ret;
2700
2701 for (i = 0; i < count; i++) {
2702 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2703 component->driver->legacy_dai_naming);
2704 if (dai == NULL) {
2705 ret = -ENOMEM;
2706 goto err;
2707 }
2708 }
2709
2710 return 0;
2711
2712err:
2713 snd_soc_unregister_dais(component);
2714
2715 return ret;
2716}
2717
2718#define ENDIANNESS_MAP(name) \
2719 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2720static u64 endianness_format_map[] = {
2721 ENDIANNESS_MAP(S16_),
2722 ENDIANNESS_MAP(U16_),
2723 ENDIANNESS_MAP(S24_),
2724 ENDIANNESS_MAP(U24_),
2725 ENDIANNESS_MAP(S32_),
2726 ENDIANNESS_MAP(U32_),
2727 ENDIANNESS_MAP(S24_3),
2728 ENDIANNESS_MAP(U24_3),
2729 ENDIANNESS_MAP(S20_3),
2730 ENDIANNESS_MAP(U20_3),
2731 ENDIANNESS_MAP(S18_3),
2732 ENDIANNESS_MAP(U18_3),
2733 ENDIANNESS_MAP(FLOAT_),
2734 ENDIANNESS_MAP(FLOAT64_),
2735 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2736};
2737
2738/*
2739 * Fix up the DAI formats for endianness: codecs don't actually see
2740 * the endianness of the data but we're using the CPU format
2741 * definitions which do need to include endianness so we ensure that
2742 * codec DAIs always have both big and little endian variants set.
2743 */
2744static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2745{
2746 int i;
2747
2748 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2749 if (stream->formats & endianness_format_map[i])
2750 stream->formats |= endianness_format_map[i];
2751}
2752
2753static void snd_soc_try_rebind_card(void)
2754{
2755 struct snd_soc_card *card, *c;
2756
2757 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2758 if (!snd_soc_bind_card(card))
2759 list_del(&card->list);
2760}
2761
2762static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2763{
2764 struct snd_soc_card *card = component->card;
2765
2766 snd_soc_unregister_dais(component);
2767
2768 if (card)
2769 snd_soc_unbind_card(card, false);
2770
2771 list_del(&component->list);
2772}
2773
2774int snd_soc_component_initialize(struct snd_soc_component *component,
2775 const struct snd_soc_component_driver *driver,
2776 struct device *dev)
2777{
2778 INIT_LIST_HEAD(&component->dai_list);
2779 INIT_LIST_HEAD(&component->dobj_list);
2780 INIT_LIST_HEAD(&component->card_list);
2781 INIT_LIST_HEAD(&component->list);
2782 mutex_init(&component->io_mutex);
2783
2784 if (!component->name) {
2785 component->name = fmt_single_name(dev, &component->id);
2786 if (!component->name) {
2787 dev_err(dev, "ASoC: Failed to allocate name\n");
2788 return -ENOMEM;
2789 }
2790 }
2791
2792 component->dev = dev;
2793 component->driver = driver;
2794
2795#ifdef CONFIG_DEBUG_FS
2796 if (!component->debugfs_prefix)
2797 component->debugfs_prefix = driver->debugfs_prefix;
2798#endif
2799
2800 return 0;
2801}
2802EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2803
2804int snd_soc_add_component(struct snd_soc_component *component,
2805 struct snd_soc_dai_driver *dai_drv,
2806 int num_dai)
2807{
2808 int ret;
2809 int i;
2810
2811 mutex_lock(&client_mutex);
2812
2813 if (component->driver->endianness) {
2814 for (i = 0; i < num_dai; i++) {
2815 convert_endianness_formats(&dai_drv[i].playback);
2816 convert_endianness_formats(&dai_drv[i].capture);
2817 }
2818 }
2819
2820 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2821 if (ret < 0) {
2822 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2823 ret);
2824 goto err_cleanup;
2825 }
2826
2827 if (!component->driver->write && !component->driver->read) {
2828 if (!component->regmap)
2829 component->regmap = dev_get_regmap(component->dev,
2830 NULL);
2831 if (component->regmap)
2832 snd_soc_component_setup_regmap(component);
2833 }
2834
2835 /* see for_each_component */
2836 list_add(&component->list, &component_list);
2837
2838err_cleanup:
2839 if (ret < 0)
2840 snd_soc_del_component_unlocked(component);
2841
2842 mutex_unlock(&client_mutex);
2843
2844 if (ret == 0)
2845 snd_soc_try_rebind_card();
2846
2847 return ret;
2848}
2849EXPORT_SYMBOL_GPL(snd_soc_add_component);
2850
2851int snd_soc_register_component(struct device *dev,
2852 const struct snd_soc_component_driver *component_driver,
2853 struct snd_soc_dai_driver *dai_drv,
2854 int num_dai)
2855{
2856 struct snd_soc_component *component;
2857 int ret;
2858
2859 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2860 if (!component)
2861 return -ENOMEM;
2862
2863 ret = snd_soc_component_initialize(component, component_driver, dev);
2864 if (ret < 0)
2865 return ret;
2866
2867 return snd_soc_add_component(component, dai_drv, num_dai);
2868}
2869EXPORT_SYMBOL_GPL(snd_soc_register_component);
2870
2871/**
2872 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2873 * from the ASoC core
2874 *
2875 * @dev: The device to unregister
2876 * @component_driver: The component driver to unregister
2877 */
2878void snd_soc_unregister_component_by_driver(struct device *dev,
2879 const struct snd_soc_component_driver *component_driver)
2880{
2881 struct snd_soc_component *component;
2882
2883 if (!component_driver)
2884 return;
2885
2886 mutex_lock(&client_mutex);
2887 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2888 if (!component)
2889 goto out;
2890
2891 snd_soc_del_component_unlocked(component);
2892
2893out:
2894 mutex_unlock(&client_mutex);
2895}
2896EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2897
2898/**
2899 * snd_soc_unregister_component - Unregister all related component
2900 * from the ASoC core
2901 *
2902 * @dev: The device to unregister
2903 */
2904void snd_soc_unregister_component(struct device *dev)
2905{
2906 mutex_lock(&client_mutex);
2907 while (1) {
2908 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2909
2910 if (!component)
2911 break;
2912
2913 snd_soc_del_component_unlocked(component);
2914 }
2915 mutex_unlock(&client_mutex);
2916}
2917EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2918
2919/* Retrieve a card's name from device tree */
2920int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2921 const char *propname)
2922{
2923 struct device_node *np;
2924 int ret;
2925
2926 if (!card->dev) {
2927 pr_err("card->dev is not set before calling %s\n", __func__);
2928 return -EINVAL;
2929 }
2930
2931 np = card->dev->of_node;
2932
2933 ret = of_property_read_string_index(np, propname, 0, &card->name);
2934 /*
2935 * EINVAL means the property does not exist. This is fine providing
2936 * card->name was previously set, which is checked later in
2937 * snd_soc_register_card.
2938 */
2939 if (ret < 0 && ret != -EINVAL) {
2940 dev_err(card->dev,
2941 "ASoC: Property '%s' could not be read: %d\n",
2942 propname, ret);
2943 return ret;
2944 }
2945
2946 return 0;
2947}
2948EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2949
2950static const struct snd_soc_dapm_widget simple_widgets[] = {
2951 SND_SOC_DAPM_MIC("Microphone", NULL),
2952 SND_SOC_DAPM_LINE("Line", NULL),
2953 SND_SOC_DAPM_HP("Headphone", NULL),
2954 SND_SOC_DAPM_SPK("Speaker", NULL),
2955};
2956
2957int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2958 const char *propname)
2959{
2960 struct device_node *np = card->dev->of_node;
2961 struct snd_soc_dapm_widget *widgets;
2962 const char *template, *wname;
2963 int i, j, num_widgets;
2964
2965 num_widgets = of_property_count_strings(np, propname);
2966 if (num_widgets < 0) {
2967 dev_err(card->dev,
2968 "ASoC: Property '%s' does not exist\n", propname);
2969 return -EINVAL;
2970 }
2971 if (!num_widgets) {
2972 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2973 propname);
2974 return -EINVAL;
2975 }
2976 if (num_widgets & 1) {
2977 dev_err(card->dev,
2978 "ASoC: Property '%s' length is not even\n", propname);
2979 return -EINVAL;
2980 }
2981
2982 num_widgets /= 2;
2983
2984 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2985 GFP_KERNEL);
2986 if (!widgets) {
2987 dev_err(card->dev,
2988 "ASoC: Could not allocate memory for widgets\n");
2989 return -ENOMEM;
2990 }
2991
2992 for (i = 0; i < num_widgets; i++) {
2993 int ret = of_property_read_string_index(np, propname,
2994 2 * i, &template);
2995 if (ret) {
2996 dev_err(card->dev,
2997 "ASoC: Property '%s' index %d read error:%d\n",
2998 propname, 2 * i, ret);
2999 return -EINVAL;
3000 }
3001
3002 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3003 if (!strncmp(template, simple_widgets[j].name,
3004 strlen(simple_widgets[j].name))) {
3005 widgets[i] = simple_widgets[j];
3006 break;
3007 }
3008 }
3009
3010 if (j >= ARRAY_SIZE(simple_widgets)) {
3011 dev_err(card->dev,
3012 "ASoC: DAPM widget '%s' is not supported\n",
3013 template);
3014 return -EINVAL;
3015 }
3016
3017 ret = of_property_read_string_index(np, propname,
3018 (2 * i) + 1,
3019 &wname);
3020 if (ret) {
3021 dev_err(card->dev,
3022 "ASoC: Property '%s' index %d read error:%d\n",
3023 propname, (2 * i) + 1, ret);
3024 return -EINVAL;
3025 }
3026
3027 widgets[i].name = wname;
3028 }
3029
3030 card->of_dapm_widgets = widgets;
3031 card->num_of_dapm_widgets = num_widgets;
3032
3033 return 0;
3034}
3035EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3036
3037int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3038{
3039 const unsigned int nb_controls_max = 16;
3040 const char **strings, *control_name;
3041 struct snd_kcontrol_new *controls;
3042 struct device *dev = card->dev;
3043 unsigned int i, nb_controls;
3044 int ret;
3045
3046 if (!of_property_read_bool(dev->of_node, prop))
3047 return 0;
3048
3049 strings = devm_kcalloc(dev, nb_controls_max,
3050 sizeof(*strings), GFP_KERNEL);
3051 if (!strings)
3052 return -ENOMEM;
3053
3054 ret = of_property_read_string_array(dev->of_node, prop,
3055 strings, nb_controls_max);
3056 if (ret < 0)
3057 return ret;
3058
3059 nb_controls = (unsigned int)ret;
3060
3061 controls = devm_kcalloc(dev, nb_controls,
3062 sizeof(*controls), GFP_KERNEL);
3063 if (!controls)
3064 return -ENOMEM;
3065
3066 for (i = 0; i < nb_controls; i++) {
3067 control_name = devm_kasprintf(dev, GFP_KERNEL,
3068 "%s Switch", strings[i]);
3069 if (!control_name)
3070 return -ENOMEM;
3071
3072 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3073 controls[i].name = control_name;
3074 controls[i].info = snd_soc_dapm_info_pin_switch;
3075 controls[i].get = snd_soc_dapm_get_pin_switch;
3076 controls[i].put = snd_soc_dapm_put_pin_switch;
3077 controls[i].private_value = (unsigned long)strings[i];
3078 }
3079
3080 card->controls = controls;
3081 card->num_controls = nb_controls;
3082
3083 return 0;
3084}
3085EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3086
3087int snd_soc_of_get_slot_mask(struct device_node *np,
3088 const char *prop_name,
3089 unsigned int *mask)
3090{
3091 u32 val;
3092 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3093 int i;
3094
3095 if (!of_slot_mask)
3096 return 0;
3097 val /= sizeof(u32);
3098 for (i = 0; i < val; i++)
3099 if (be32_to_cpup(&of_slot_mask[i]))
3100 *mask |= (1 << i);
3101
3102 return val;
3103}
3104EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3105
3106int snd_soc_of_parse_tdm_slot(struct device_node *np,
3107 unsigned int *tx_mask,
3108 unsigned int *rx_mask,
3109 unsigned int *slots,
3110 unsigned int *slot_width)
3111{
3112 u32 val;
3113 int ret;
3114
3115 if (tx_mask)
3116 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3117 if (rx_mask)
3118 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3119
3120 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3121 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3122 if (ret)
3123 return ret;
3124
3125 if (slots)
3126 *slots = val;
3127 }
3128
3129 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3130 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3131 if (ret)
3132 return ret;
3133
3134 if (slot_width)
3135 *slot_width = val;
3136 }
3137
3138 return 0;
3139}
3140EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3141
3142void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3143 struct snd_soc_dai_link_component *cpus)
3144{
3145 platforms->of_node = cpus->of_node;
3146 platforms->dai_args = cpus->dai_args;
3147}
3148EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3149
3150void snd_soc_of_parse_node_prefix(struct device_node *np,
3151 struct snd_soc_codec_conf *codec_conf,
3152 struct device_node *of_node,
3153 const char *propname)
3154{
3155 const char *str;
3156 int ret;
3157
3158 ret = of_property_read_string(np, propname, &str);
3159 if (ret < 0) {
3160 /* no prefix is not error */
3161 return;
3162 }
3163
3164 codec_conf->dlc.of_node = of_node;
3165 codec_conf->name_prefix = str;
3166}
3167EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3168
3169int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3170 const char *propname)
3171{
3172 struct device_node *np = card->dev->of_node;
3173 int num_routes;
3174 struct snd_soc_dapm_route *routes;
3175 int i;
3176
3177 num_routes = of_property_count_strings(np, propname);
3178 if (num_routes < 0 || num_routes & 1) {
3179 dev_err(card->dev,
3180 "ASoC: Property '%s' does not exist or its length is not even\n",
3181 propname);
3182 return -EINVAL;
3183 }
3184 num_routes /= 2;
3185
3186 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3187 GFP_KERNEL);
3188 if (!routes) {
3189 dev_err(card->dev,
3190 "ASoC: Could not allocate DAPM route table\n");
3191 return -ENOMEM;
3192 }
3193
3194 for (i = 0; i < num_routes; i++) {
3195 int ret = of_property_read_string_index(np, propname,
3196 2 * i, &routes[i].sink);
3197 if (ret) {
3198 dev_err(card->dev,
3199 "ASoC: Property '%s' index %d could not be read: %d\n",
3200 propname, 2 * i, ret);
3201 return -EINVAL;
3202 }
3203 ret = of_property_read_string_index(np, propname,
3204 (2 * i) + 1, &routes[i].source);
3205 if (ret) {
3206 dev_err(card->dev,
3207 "ASoC: Property '%s' index %d could not be read: %d\n",
3208 propname, (2 * i) + 1, ret);
3209 return -EINVAL;
3210 }
3211 }
3212
3213 card->num_of_dapm_routes = num_routes;
3214 card->of_dapm_routes = routes;
3215
3216 return 0;
3217}
3218EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3219
3220int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3221{
3222 struct device_node *node = card->dev->of_node;
3223 struct snd_soc_aux_dev *aux;
3224 int num, i;
3225
3226 num = of_count_phandle_with_args(node, propname, NULL);
3227 if (num == -ENOENT) {
3228 return 0;
3229 } else if (num < 0) {
3230 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3231 propname, num);
3232 return num;
3233 }
3234
3235 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3236 if (!aux)
3237 return -ENOMEM;
3238 card->aux_dev = aux;
3239 card->num_aux_devs = num;
3240
3241 for_each_card_pre_auxs(card, i, aux) {
3242 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3243 if (!aux->dlc.of_node)
3244 return -EINVAL;
3245 }
3246
3247 return 0;
3248}
3249EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3250
3251unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3252{
3253 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3254
3255 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3256 case SND_SOC_DAIFMT_CBP_CFP:
3257 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3258 break;
3259 case SND_SOC_DAIFMT_CBP_CFC:
3260 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3261 break;
3262 case SND_SOC_DAIFMT_CBC_CFP:
3263 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3264 break;
3265 case SND_SOC_DAIFMT_CBC_CFC:
3266 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3267 break;
3268 }
3269
3270 return inv_dai_fmt;
3271}
3272EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3273
3274unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3275{
3276 /*
3277 * bit_frame is return value from
3278 * snd_soc_daifmt_parse_clock_provider_raw()
3279 */
3280
3281 /* Codec base */
3282 switch (bit_frame) {
3283 case 0x11:
3284 return SND_SOC_DAIFMT_CBP_CFP;
3285 case 0x10:
3286 return SND_SOC_DAIFMT_CBP_CFC;
3287 case 0x01:
3288 return SND_SOC_DAIFMT_CBC_CFP;
3289 default:
3290 return SND_SOC_DAIFMT_CBC_CFC;
3291 }
3292
3293 return 0;
3294}
3295EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3296
3297unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3298 const char *prefix)
3299{
3300 int ret;
3301 char prop[128];
3302 unsigned int format = 0;
3303 int bit, frame;
3304 const char *str;
3305 struct {
3306 char *name;
3307 unsigned int val;
3308 } of_fmt_table[] = {
3309 { "i2s", SND_SOC_DAIFMT_I2S },
3310 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3311 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3312 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3313 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3314 { "ac97", SND_SOC_DAIFMT_AC97 },
3315 { "pdm", SND_SOC_DAIFMT_PDM},
3316 { "msb", SND_SOC_DAIFMT_MSB },
3317 { "lsb", SND_SOC_DAIFMT_LSB },
3318 };
3319
3320 if (!prefix)
3321 prefix = "";
3322
3323 /*
3324 * check "dai-format = xxx"
3325 * or "[prefix]format = xxx"
3326 * SND_SOC_DAIFMT_FORMAT_MASK area
3327 */
3328 ret = of_property_read_string(np, "dai-format", &str);
3329 if (ret < 0) {
3330 snprintf(prop, sizeof(prop), "%sformat", prefix);
3331 ret = of_property_read_string(np, prop, &str);
3332 }
3333 if (ret == 0) {
3334 int i;
3335
3336 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3337 if (strcmp(str, of_fmt_table[i].name) == 0) {
3338 format |= of_fmt_table[i].val;
3339 break;
3340 }
3341 }
3342 }
3343
3344 /*
3345 * check "[prefix]continuous-clock"
3346 * SND_SOC_DAIFMT_CLOCK_MASK area
3347 */
3348 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3349 if (of_property_read_bool(np, prop))
3350 format |= SND_SOC_DAIFMT_CONT;
3351 else
3352 format |= SND_SOC_DAIFMT_GATED;
3353
3354 /*
3355 * check "[prefix]bitclock-inversion"
3356 * check "[prefix]frame-inversion"
3357 * SND_SOC_DAIFMT_INV_MASK area
3358 */
3359 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3360 bit = of_property_read_bool(np, prop);
3361
3362 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3363 frame = of_property_read_bool(np, prop);
3364
3365 switch ((bit << 4) + frame) {
3366 case 0x11:
3367 format |= SND_SOC_DAIFMT_IB_IF;
3368 break;
3369 case 0x10:
3370 format |= SND_SOC_DAIFMT_IB_NF;
3371 break;
3372 case 0x01:
3373 format |= SND_SOC_DAIFMT_NB_IF;
3374 break;
3375 default:
3376 /* SND_SOC_DAIFMT_NB_NF is default */
3377 break;
3378 }
3379
3380 return format;
3381}
3382EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3383
3384unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3385 const char *prefix,
3386 struct device_node **bitclkmaster,
3387 struct device_node **framemaster)
3388{
3389 char prop[128];
3390 unsigned int bit, frame;
3391
3392 if (!prefix)
3393 prefix = "";
3394
3395 /*
3396 * check "[prefix]bitclock-master"
3397 * check "[prefix]frame-master"
3398 */
3399 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3400 bit = of_property_read_bool(np, prop);
3401 if (bit && bitclkmaster)
3402 *bitclkmaster = of_parse_phandle(np, prop, 0);
3403
3404 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3405 frame = of_property_read_bool(np, prop);
3406 if (frame && framemaster)
3407 *framemaster = of_parse_phandle(np, prop, 0);
3408
3409 /*
3410 * return bitmap.
3411 * It will be parameter of
3412 * snd_soc_daifmt_clock_provider_from_bitmap()
3413 */
3414 return (bit << 4) + frame;
3415}
3416EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3417
3418int snd_soc_get_stream_cpu(const struct snd_soc_dai_link *dai_link, int stream)
3419{
3420 /*
3421 * [Normal]
3422 *
3423 * Playback
3424 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3425 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3426 *
3427 * Capture
3428 * CPU : SNDRV_PCM_STREAM_CAPTURE
3429 * Codec: SNDRV_PCM_STREAM_CAPTURE
3430 */
3431 if (!dai_link->c2c_params)
3432 return stream;
3433
3434 /*
3435 * [Codec2Codec]
3436 *
3437 * Playback
3438 * CPU : SNDRV_PCM_STREAM_CAPTURE
3439 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3440 *
3441 * Capture
3442 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3443 * Codec: SNDRV_PCM_STREAM_CAPTURE
3444 */
3445 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3446 return SNDRV_PCM_STREAM_PLAYBACK;
3447
3448 return SNDRV_PCM_STREAM_CAPTURE;
3449}
3450EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3451
3452int snd_soc_get_dai_id(struct device_node *ep)
3453{
3454 struct snd_soc_component *component;
3455 struct snd_soc_dai_link_component dlc = {
3456 .of_node = of_graph_get_port_parent(ep),
3457 };
3458 int ret;
3459
3460
3461 /*
3462 * For example HDMI case, HDMI has video/sound port,
3463 * but ALSA SoC needs sound port number only.
3464 * Thus counting HDMI DT port/endpoint doesn't work.
3465 * Then, it should have .of_xlate_dai_id
3466 */
3467 ret = -ENOTSUPP;
3468 mutex_lock(&client_mutex);
3469 component = soc_find_component(&dlc);
3470 if (component)
3471 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3472 mutex_unlock(&client_mutex);
3473
3474 of_node_put(dlc.of_node);
3475
3476 return ret;
3477}
3478EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3479
3480int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3481{
3482 struct snd_soc_component *pos;
3483 int ret = -EPROBE_DEFER;
3484
3485 mutex_lock(&client_mutex);
3486 for_each_component(pos) {
3487 struct device_node *component_of_node = soc_component_to_node(pos);
3488
3489 if (component_of_node != args->np || !pos->num_dai)
3490 continue;
3491
3492 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3493 if (ret == -ENOTSUPP) {
3494 struct snd_soc_dai *dai;
3495 int id = -1;
3496
3497 switch (args->args_count) {
3498 case 0:
3499 id = 0; /* same as dai_drv[0] */
3500 break;
3501 case 1:
3502 id = args->args[0];
3503 break;
3504 default:
3505 /* not supported */
3506 break;
3507 }
3508
3509 if (id < 0 || id >= pos->num_dai) {
3510 ret = -EINVAL;
3511 continue;
3512 }
3513
3514 ret = 0;
3515
3516 /* find target DAI */
3517 for_each_component_dais(pos, dai) {
3518 if (id == 0)
3519 break;
3520 id--;
3521 }
3522
3523 dlc->dai_name = snd_soc_dai_name_get(dai);
3524 } else if (ret) {
3525 /*
3526 * if another error than ENOTSUPP is returned go on and
3527 * check if another component is provided with the same
3528 * node. This may happen if a device provides several
3529 * components
3530 */
3531 continue;
3532 }
3533
3534 break;
3535 }
3536
3537 if (ret == 0)
3538 dlc->of_node = args->np;
3539
3540 mutex_unlock(&client_mutex);
3541 return ret;
3542}
3543EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3544
3545int snd_soc_of_get_dlc(struct device_node *of_node,
3546 struct of_phandle_args *args,
3547 struct snd_soc_dai_link_component *dlc,
3548 int index)
3549{
3550 struct of_phandle_args __args;
3551 int ret;
3552
3553 if (!args)
3554 args = &__args;
3555
3556 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3557 "#sound-dai-cells", index, args);
3558 if (ret)
3559 return ret;
3560
3561 return snd_soc_get_dlc(args, dlc);
3562}
3563EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3564
3565int snd_soc_get_dai_name(const struct of_phandle_args *args,
3566 const char **dai_name)
3567{
3568 struct snd_soc_dai_link_component dlc;
3569 int ret = snd_soc_get_dlc(args, &dlc);
3570
3571 if (ret == 0)
3572 *dai_name = dlc.dai_name;
3573
3574 return ret;
3575}
3576EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3577
3578int snd_soc_of_get_dai_name(struct device_node *of_node,
3579 const char **dai_name, int index)
3580{
3581 struct snd_soc_dai_link_component dlc;
3582 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3583
3584 if (ret == 0)
3585 *dai_name = dlc.dai_name;
3586
3587 return ret;
3588}
3589EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3590
3591struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
3592{
3593 struct snd_soc_dai *dai;
3594 struct snd_soc_component *component;
3595
3596 mutex_lock(&client_mutex);
3597 for_each_component(component) {
3598 for_each_component_dais(component, dai)
3599 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3600 goto found;
3601 }
3602 dai = NULL;
3603found:
3604 mutex_unlock(&client_mutex);
3605 return dai;
3606}
3607EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3608
3609static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3610{
3611 if (component->of_node) {
3612 of_node_put(component->of_node);
3613 component->of_node = NULL;
3614 }
3615}
3616
3617static int __snd_soc_of_get_dai_link_component_alloc(
3618 struct device *dev, struct device_node *of_node,
3619 struct snd_soc_dai_link_component **ret_component,
3620 int *ret_num)
3621{
3622 struct snd_soc_dai_link_component *component;
3623 int num;
3624
3625 /* Count the number of CPUs/CODECs */
3626 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3627 if (num <= 0) {
3628 if (num == -ENOENT)
3629 dev_err(dev, "No 'sound-dai' property\n");
3630 else
3631 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3632 return num;
3633 }
3634 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3635 if (!component)
3636 return -ENOMEM;
3637
3638 *ret_component = component;
3639 *ret_num = num;
3640
3641 return 0;
3642}
3643
3644/*
3645 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3646 * @dai_link: DAI link
3647 *
3648 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3649 */
3650void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3651{
3652 struct snd_soc_dai_link_component *component;
3653 int index;
3654
3655 for_each_link_codecs(dai_link, index, component)
3656 __snd_soc_of_put_component(component);
3657}
3658EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3659
3660/*
3661 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3662 * @dev: Card device
3663 * @of_node: Device node
3664 * @dai_link: DAI link
3665 *
3666 * Builds an array of CODEC DAI components from the DAI link property
3667 * 'sound-dai'.
3668 * The array is set in the DAI link and the number of DAIs is set accordingly.
3669 * The device nodes in the array (of_node) must be dereferenced by calling
3670 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3671 *
3672 * Returns 0 for success
3673 */
3674int snd_soc_of_get_dai_link_codecs(struct device *dev,
3675 struct device_node *of_node,
3676 struct snd_soc_dai_link *dai_link)
3677{
3678 struct snd_soc_dai_link_component *component;
3679 int index, ret;
3680
3681 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3682 &dai_link->codecs, &dai_link->num_codecs);
3683 if (ret < 0)
3684 return ret;
3685
3686 /* Parse the list */
3687 for_each_link_codecs(dai_link, index, component) {
3688 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3689 if (ret)
3690 goto err;
3691 }
3692 return 0;
3693err:
3694 snd_soc_of_put_dai_link_codecs(dai_link);
3695 dai_link->codecs = NULL;
3696 dai_link->num_codecs = 0;
3697 return ret;
3698}
3699EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3700
3701/*
3702 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3703 * @dai_link: DAI link
3704 *
3705 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3706 */
3707void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3708{
3709 struct snd_soc_dai_link_component *component;
3710 int index;
3711
3712 for_each_link_cpus(dai_link, index, component)
3713 __snd_soc_of_put_component(component);
3714}
3715EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3716
3717/*
3718 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3719 * @dev: Card device
3720 * @of_node: Device node
3721 * @dai_link: DAI link
3722 *
3723 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3724 * instead.
3725 *
3726 * Returns 0 for success
3727 */
3728int snd_soc_of_get_dai_link_cpus(struct device *dev,
3729 struct device_node *of_node,
3730 struct snd_soc_dai_link *dai_link)
3731{
3732 struct snd_soc_dai_link_component *component;
3733 int index, ret;
3734
3735 /* Count the number of CPUs */
3736 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3737 &dai_link->cpus, &dai_link->num_cpus);
3738 if (ret < 0)
3739 return ret;
3740
3741 /* Parse the list */
3742 for_each_link_cpus(dai_link, index, component) {
3743 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3744 if (ret)
3745 goto err;
3746 }
3747 return 0;
3748err:
3749 snd_soc_of_put_dai_link_cpus(dai_link);
3750 dai_link->cpus = NULL;
3751 dai_link->num_cpus = 0;
3752 return ret;
3753}
3754EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3755
3756static int __init snd_soc_init(void)
3757{
3758 int ret;
3759
3760 snd_soc_debugfs_init();
3761 ret = snd_soc_util_init();
3762 if (ret)
3763 goto err_util_init;
3764
3765 ret = platform_driver_register(&soc_driver);
3766 if (ret)
3767 goto err_register;
3768 return 0;
3769
3770err_register:
3771 snd_soc_util_exit();
3772err_util_init:
3773 snd_soc_debugfs_exit();
3774 return ret;
3775}
3776module_init(snd_soc_init);
3777
3778static void __exit snd_soc_exit(void)
3779{
3780 snd_soc_util_exit();
3781 snd_soc_debugfs_exit();
3782
3783 platform_driver_unregister(&soc_driver);
3784}
3785module_exit(snd_soc_exit);
3786
3787/* Module information */
3788MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3789MODULE_DESCRIPTION("ALSA SoC Core");
3790MODULE_LICENSE("GPL");
3791MODULE_ALIAS("platform:soc-audio");