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