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1/*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/bitops.h>
31#include <linux/debugfs.h>
32#include <linux/platform_device.h>
33#include <linux/pinctrl/consumer.h>
34#include <linux/ctype.h>
35#include <linux/slab.h>
36#include <linux/of.h>
37#include <sound/core.h>
38#include <sound/jack.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include <sound/soc.h>
42#include <sound/soc-dpcm.h>
43#include <sound/soc-topology.h>
44#include <sound/initval.h>
45
46#define CREATE_TRACE_POINTS
47#include <trace/events/asoc.h>
48
49#define NAME_SIZE 32
50
51#ifdef CONFIG_DEBUG_FS
52struct dentry *snd_soc_debugfs_root;
53EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
54#endif
55
56static DEFINE_MUTEX(client_mutex);
57static LIST_HEAD(platform_list);
58static LIST_HEAD(codec_list);
59static LIST_HEAD(component_list);
60
61/*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66static int pmdown_time = 5000;
67module_param(pmdown_time, int, 0);
68MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70/* returns the minimum number of bytes needed to represent
71 * a particular given value */
72static int min_bytes_needed(unsigned long val)
73{
74 int c = 0;
75 int i;
76
77 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
78 if (val & (1UL << i))
79 break;
80 c = (sizeof val * 8) - c;
81 if (!c || (c % 8))
82 c = (c + 8) / 8;
83 else
84 c /= 8;
85 return c;
86}
87
88/* fill buf which is 'len' bytes with a formatted
89 * string of the form 'reg: value\n' */
90static int format_register_str(struct snd_soc_codec *codec,
91 unsigned int reg, char *buf, size_t len)
92{
93 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
94 int regsize = codec->driver->reg_word_size * 2;
95 int ret;
96
97 /* +2 for ': ' and + 1 for '\n' */
98 if (wordsize + regsize + 2 + 1 != len)
99 return -EINVAL;
100
101 sprintf(buf, "%.*x: ", wordsize, reg);
102 buf += wordsize + 2;
103
104 ret = snd_soc_read(codec, reg);
105 if (ret < 0)
106 memset(buf, 'X', regsize);
107 else
108 sprintf(buf, "%.*x", regsize, ret);
109 buf[regsize] = '\n';
110 /* no NUL-termination needed */
111 return 0;
112}
113
114/* codec register dump */
115static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
116 size_t count, loff_t pos)
117{
118 int i, step = 1;
119 int wordsize, regsize;
120 int len;
121 size_t total = 0;
122 loff_t p = 0;
123
124 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
125 regsize = codec->driver->reg_word_size * 2;
126
127 len = wordsize + regsize + 2 + 1;
128
129 if (!codec->driver->reg_cache_size)
130 return 0;
131
132 if (codec->driver->reg_cache_step)
133 step = codec->driver->reg_cache_step;
134
135 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
136 /* only support larger than PAGE_SIZE bytes debugfs
137 * entries for the default case */
138 if (p >= pos) {
139 if (total + len >= count - 1)
140 break;
141 format_register_str(codec, i, buf + total, len);
142 total += len;
143 }
144 p += len;
145 }
146
147 total = min(total, count - 1);
148
149 return total;
150}
151
152static ssize_t codec_reg_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
154{
155 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
156
157 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
158}
159
160static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
161
162static ssize_t pmdown_time_show(struct device *dev,
163 struct device_attribute *attr, char *buf)
164{
165 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
166
167 return sprintf(buf, "%ld\n", rtd->pmdown_time);
168}
169
170static ssize_t pmdown_time_set(struct device *dev,
171 struct device_attribute *attr,
172 const char *buf, size_t count)
173{
174 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
175 int ret;
176
177 ret = kstrtol(buf, 10, &rtd->pmdown_time);
178 if (ret)
179 return ret;
180
181 return count;
182}
183
184static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
185
186static struct attribute *soc_dev_attrs[] = {
187 &dev_attr_codec_reg.attr,
188 &dev_attr_pmdown_time.attr,
189 NULL
190};
191
192static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
193 struct attribute *attr, int idx)
194{
195 struct device *dev = kobj_to_dev(kobj);
196 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
197
198 if (attr == &dev_attr_pmdown_time.attr)
199 return attr->mode; /* always visible */
200 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
201}
202
203static const struct attribute_group soc_dapm_dev_group = {
204 .attrs = soc_dapm_dev_attrs,
205 .is_visible = soc_dev_attr_is_visible,
206};
207
208static const struct attribute_group soc_dev_roup = {
209 .attrs = soc_dev_attrs,
210 .is_visible = soc_dev_attr_is_visible,
211};
212
213static const struct attribute_group *soc_dev_attr_groups[] = {
214 &soc_dapm_dev_group,
215 &soc_dev_roup,
216 NULL
217};
218
219#ifdef CONFIG_DEBUG_FS
220static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
221 size_t count, loff_t *ppos)
222{
223 ssize_t ret;
224 struct snd_soc_codec *codec = file->private_data;
225 char *buf;
226
227 if (*ppos < 0 || !count)
228 return -EINVAL;
229
230 buf = kmalloc(count, GFP_KERNEL);
231 if (!buf)
232 return -ENOMEM;
233
234 ret = soc_codec_reg_show(codec, buf, count, *ppos);
235 if (ret >= 0) {
236 if (copy_to_user(user_buf, buf, ret)) {
237 kfree(buf);
238 return -EFAULT;
239 }
240 *ppos += ret;
241 }
242
243 kfree(buf);
244 return ret;
245}
246
247static ssize_t codec_reg_write_file(struct file *file,
248 const char __user *user_buf, size_t count, loff_t *ppos)
249{
250 char buf[32];
251 size_t buf_size;
252 char *start = buf;
253 unsigned long reg, value;
254 struct snd_soc_codec *codec = file->private_data;
255 int ret;
256
257 buf_size = min(count, (sizeof(buf)-1));
258 if (copy_from_user(buf, user_buf, buf_size))
259 return -EFAULT;
260 buf[buf_size] = 0;
261
262 while (*start == ' ')
263 start++;
264 reg = simple_strtoul(start, &start, 16);
265 while (*start == ' ')
266 start++;
267 ret = kstrtoul(start, 16, &value);
268 if (ret)
269 return ret;
270
271 /* Userspace has been fiddling around behind the kernel's back */
272 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
273
274 snd_soc_write(codec, reg, value);
275 return buf_size;
276}
277
278static const struct file_operations codec_reg_fops = {
279 .open = simple_open,
280 .read = codec_reg_read_file,
281 .write = codec_reg_write_file,
282 .llseek = default_llseek,
283};
284
285static void soc_init_component_debugfs(struct snd_soc_component *component)
286{
287 if (!component->card->debugfs_card_root)
288 return;
289
290 if (component->debugfs_prefix) {
291 char *name;
292
293 name = kasprintf(GFP_KERNEL, "%s:%s",
294 component->debugfs_prefix, component->name);
295 if (name) {
296 component->debugfs_root = debugfs_create_dir(name,
297 component->card->debugfs_card_root);
298 kfree(name);
299 }
300 } else {
301 component->debugfs_root = debugfs_create_dir(component->name,
302 component->card->debugfs_card_root);
303 }
304
305 if (!component->debugfs_root) {
306 dev_warn(component->dev,
307 "ASoC: Failed to create component debugfs directory\n");
308 return;
309 }
310
311 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
312 component->debugfs_root);
313
314 if (component->init_debugfs)
315 component->init_debugfs(component);
316}
317
318static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
319{
320 debugfs_remove_recursive(component->debugfs_root);
321}
322
323static void soc_init_codec_debugfs(struct snd_soc_component *component)
324{
325 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
326
327 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
328 codec->component.debugfs_root,
329 codec, &codec_reg_fops);
330 if (!codec->debugfs_reg)
331 dev_warn(codec->dev,
332 "ASoC: Failed to create codec register debugfs file\n");
333}
334
335static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
336 size_t count, loff_t *ppos)
337{
338 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
339 ssize_t len, ret = 0;
340 struct snd_soc_codec *codec;
341
342 if (!buf)
343 return -ENOMEM;
344
345 mutex_lock(&client_mutex);
346
347 list_for_each_entry(codec, &codec_list, list) {
348 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
349 codec->component.name);
350 if (len >= 0)
351 ret += len;
352 if (ret > PAGE_SIZE) {
353 ret = PAGE_SIZE;
354 break;
355 }
356 }
357
358 mutex_unlock(&client_mutex);
359
360 if (ret >= 0)
361 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
362
363 kfree(buf);
364
365 return ret;
366}
367
368static const struct file_operations codec_list_fops = {
369 .read = codec_list_read_file,
370 .llseek = default_llseek,/* read accesses f_pos */
371};
372
373static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
374 size_t count, loff_t *ppos)
375{
376 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
377 ssize_t len, ret = 0;
378 struct snd_soc_component *component;
379 struct snd_soc_dai *dai;
380
381 if (!buf)
382 return -ENOMEM;
383
384 mutex_lock(&client_mutex);
385
386 list_for_each_entry(component, &component_list, list) {
387 list_for_each_entry(dai, &component->dai_list, list) {
388 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
389 dai->name);
390 if (len >= 0)
391 ret += len;
392 if (ret > PAGE_SIZE) {
393 ret = PAGE_SIZE;
394 break;
395 }
396 }
397 }
398
399 mutex_unlock(&client_mutex);
400
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403 kfree(buf);
404
405 return ret;
406}
407
408static const struct file_operations dai_list_fops = {
409 .read = dai_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
411};
412
413static ssize_t platform_list_read_file(struct file *file,
414 char __user *user_buf,
415 size_t count, loff_t *ppos)
416{
417 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
418 ssize_t len, ret = 0;
419 struct snd_soc_platform *platform;
420
421 if (!buf)
422 return -ENOMEM;
423
424 mutex_lock(&client_mutex);
425
426 list_for_each_entry(platform, &platform_list, list) {
427 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
428 platform->component.name);
429 if (len >= 0)
430 ret += len;
431 if (ret > PAGE_SIZE) {
432 ret = PAGE_SIZE;
433 break;
434 }
435 }
436
437 mutex_unlock(&client_mutex);
438
439 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
440
441 kfree(buf);
442
443 return ret;
444}
445
446static const struct file_operations platform_list_fops = {
447 .read = platform_list_read_file,
448 .llseek = default_llseek,/* read accesses f_pos */
449};
450
451static void soc_init_card_debugfs(struct snd_soc_card *card)
452{
453 if (!snd_soc_debugfs_root)
454 return;
455
456 card->debugfs_card_root = debugfs_create_dir(card->name,
457 snd_soc_debugfs_root);
458 if (!card->debugfs_card_root) {
459 dev_warn(card->dev,
460 "ASoC: Failed to create card debugfs directory\n");
461 return;
462 }
463
464 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
465 card->debugfs_card_root,
466 &card->pop_time);
467 if (!card->debugfs_pop_time)
468 dev_warn(card->dev,
469 "ASoC: Failed to create pop time debugfs file\n");
470}
471
472static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
473{
474 debugfs_remove_recursive(card->debugfs_card_root);
475}
476
477
478static void snd_soc_debugfs_init(void)
479{
480 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
481 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
482 pr_warn("ASoC: Failed to create debugfs directory\n");
483 snd_soc_debugfs_root = NULL;
484 return;
485 }
486
487 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
488 &codec_list_fops))
489 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
490
491 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
492 &dai_list_fops))
493 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
494
495 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
496 &platform_list_fops))
497 pr_warn("ASoC: Failed to create platform list debugfs file\n");
498}
499
500static void snd_soc_debugfs_exit(void)
501{
502 debugfs_remove_recursive(snd_soc_debugfs_root);
503}
504
505#else
506
507#define soc_init_codec_debugfs NULL
508
509static inline void soc_init_component_debugfs(
510 struct snd_soc_component *component)
511{
512}
513
514static inline void soc_cleanup_component_debugfs(
515 struct snd_soc_component *component)
516{
517}
518
519static inline void soc_init_card_debugfs(struct snd_soc_card *card)
520{
521}
522
523static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
524{
525}
526
527static inline void snd_soc_debugfs_init(void)
528{
529}
530
531static inline void snd_soc_debugfs_exit(void)
532{
533}
534
535#endif
536
537struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
538 const char *dai_link, int stream)
539{
540 struct snd_soc_pcm_runtime *rtd;
541
542 list_for_each_entry(rtd, &card->rtd_list, list) {
543 if (rtd->dai_link->no_pcm &&
544 !strcmp(rtd->dai_link->name, dai_link))
545 return rtd->pcm->streams[stream].substream;
546 }
547 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
548 return NULL;
549}
550EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
551
552static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
553 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
554{
555 struct snd_soc_pcm_runtime *rtd;
556
557 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
558 if (!rtd)
559 return NULL;
560
561 rtd->card = card;
562 rtd->dai_link = dai_link;
563 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
564 dai_link->num_codecs,
565 GFP_KERNEL);
566 if (!rtd->codec_dais) {
567 kfree(rtd);
568 return NULL;
569 }
570
571 return rtd;
572}
573
574static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
575{
576 if (rtd && rtd->codec_dais)
577 kfree(rtd->codec_dais);
578 kfree(rtd);
579}
580
581static void soc_add_pcm_runtime(struct snd_soc_card *card,
582 struct snd_soc_pcm_runtime *rtd)
583{
584 list_add_tail(&rtd->list, &card->rtd_list);
585 rtd->num = card->num_rtd;
586 card->num_rtd++;
587}
588
589static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
590{
591 struct snd_soc_pcm_runtime *rtd, *_rtd;
592
593 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
594 list_del(&rtd->list);
595 soc_free_pcm_runtime(rtd);
596 }
597
598 card->num_rtd = 0;
599}
600
601struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
602 const char *dai_link)
603{
604 struct snd_soc_pcm_runtime *rtd;
605
606 list_for_each_entry(rtd, &card->rtd_list, list) {
607 if (!strcmp(rtd->dai_link->name, dai_link))
608 return rtd;
609 }
610 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
611 return NULL;
612}
613EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
614
615static void codec2codec_close_delayed_work(struct work_struct *work)
616{
617 /* Currently nothing to do for c2c links
618 * Since c2c links are internal nodes in the DAPM graph and
619 * don't interface with the outside world or application layer
620 * we don't have to do any special handling on close.
621 */
622}
623
624#ifdef CONFIG_PM_SLEEP
625/* powers down audio subsystem for suspend */
626int snd_soc_suspend(struct device *dev)
627{
628 struct snd_soc_card *card = dev_get_drvdata(dev);
629 struct snd_soc_component *component;
630 struct snd_soc_pcm_runtime *rtd;
631 int i;
632
633 /* If the card is not initialized yet there is nothing to do */
634 if (!card->instantiated)
635 return 0;
636
637 /* Due to the resume being scheduled into a workqueue we could
638 * suspend before that's finished - wait for it to complete.
639 */
640 snd_power_lock(card->snd_card);
641 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
642 snd_power_unlock(card->snd_card);
643
644 /* we're going to block userspace touching us until resume completes */
645 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
646
647 /* mute any active DACs */
648 list_for_each_entry(rtd, &card->rtd_list, list) {
649
650 if (rtd->dai_link->ignore_suspend)
651 continue;
652
653 for (i = 0; i < rtd->num_codecs; i++) {
654 struct snd_soc_dai *dai = rtd->codec_dais[i];
655 struct snd_soc_dai_driver *drv = dai->driver;
656
657 if (drv->ops->digital_mute && dai->playback_active)
658 drv->ops->digital_mute(dai, 1);
659 }
660 }
661
662 /* suspend all pcms */
663 list_for_each_entry(rtd, &card->rtd_list, list) {
664 if (rtd->dai_link->ignore_suspend)
665 continue;
666
667 snd_pcm_suspend_all(rtd->pcm);
668 }
669
670 if (card->suspend_pre)
671 card->suspend_pre(card);
672
673 list_for_each_entry(rtd, &card->rtd_list, list) {
674 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
675
676 if (rtd->dai_link->ignore_suspend)
677 continue;
678
679 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
680 cpu_dai->driver->suspend(cpu_dai);
681 }
682
683 /* close any waiting streams */
684 list_for_each_entry(rtd, &card->rtd_list, list)
685 flush_delayed_work(&rtd->delayed_work);
686
687 list_for_each_entry(rtd, &card->rtd_list, list) {
688
689 if (rtd->dai_link->ignore_suspend)
690 continue;
691
692 snd_soc_dapm_stream_event(rtd,
693 SNDRV_PCM_STREAM_PLAYBACK,
694 SND_SOC_DAPM_STREAM_SUSPEND);
695
696 snd_soc_dapm_stream_event(rtd,
697 SNDRV_PCM_STREAM_CAPTURE,
698 SND_SOC_DAPM_STREAM_SUSPEND);
699 }
700
701 /* Recheck all endpoints too, their state is affected by suspend */
702 dapm_mark_endpoints_dirty(card);
703 snd_soc_dapm_sync(&card->dapm);
704
705 /* suspend all COMPONENTs */
706 list_for_each_entry(component, &card->component_dev_list, card_list) {
707 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
708
709 /* If there are paths active then the COMPONENT will be held with
710 * bias _ON and should not be suspended. */
711 if (!component->suspended) {
712 switch (snd_soc_dapm_get_bias_level(dapm)) {
713 case SND_SOC_BIAS_STANDBY:
714 /*
715 * If the COMPONENT is capable of idle
716 * bias off then being in STANDBY
717 * means it's doing something,
718 * otherwise fall through.
719 */
720 if (dapm->idle_bias_off) {
721 dev_dbg(component->dev,
722 "ASoC: idle_bias_off CODEC on over suspend\n");
723 break;
724 }
725
726 case SND_SOC_BIAS_OFF:
727 if (component->suspend)
728 component->suspend(component);
729 component->suspended = 1;
730 if (component->regmap)
731 regcache_mark_dirty(component->regmap);
732 /* deactivate pins to sleep state */
733 pinctrl_pm_select_sleep_state(component->dev);
734 break;
735 default:
736 dev_dbg(component->dev,
737 "ASoC: COMPONENT is on over suspend\n");
738 break;
739 }
740 }
741 }
742
743 list_for_each_entry(rtd, &card->rtd_list, list) {
744 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
745
746 if (rtd->dai_link->ignore_suspend)
747 continue;
748
749 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
750 cpu_dai->driver->suspend(cpu_dai);
751
752 /* deactivate pins to sleep state */
753 pinctrl_pm_select_sleep_state(cpu_dai->dev);
754 }
755
756 if (card->suspend_post)
757 card->suspend_post(card);
758
759 return 0;
760}
761EXPORT_SYMBOL_GPL(snd_soc_suspend);
762
763/* deferred resume work, so resume can complete before we finished
764 * setting our codec back up, which can be very slow on I2C
765 */
766static void soc_resume_deferred(struct work_struct *work)
767{
768 struct snd_soc_card *card =
769 container_of(work, struct snd_soc_card, deferred_resume_work);
770 struct snd_soc_pcm_runtime *rtd;
771 struct snd_soc_component *component;
772 int i;
773
774 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
775 * so userspace apps are blocked from touching us
776 */
777
778 dev_dbg(card->dev, "ASoC: starting resume work\n");
779
780 /* Bring us up into D2 so that DAPM starts enabling things */
781 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
782
783 if (card->resume_pre)
784 card->resume_pre(card);
785
786 /* resume control bus DAIs */
787 list_for_each_entry(rtd, &card->rtd_list, list) {
788 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
789
790 if (rtd->dai_link->ignore_suspend)
791 continue;
792
793 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
794 cpu_dai->driver->resume(cpu_dai);
795 }
796
797 list_for_each_entry(component, &card->component_dev_list, card_list) {
798 if (component->suspended) {
799 if (component->resume)
800 component->resume(component);
801 component->suspended = 0;
802 }
803 }
804
805 list_for_each_entry(rtd, &card->rtd_list, list) {
806
807 if (rtd->dai_link->ignore_suspend)
808 continue;
809
810 snd_soc_dapm_stream_event(rtd,
811 SNDRV_PCM_STREAM_PLAYBACK,
812 SND_SOC_DAPM_STREAM_RESUME);
813
814 snd_soc_dapm_stream_event(rtd,
815 SNDRV_PCM_STREAM_CAPTURE,
816 SND_SOC_DAPM_STREAM_RESUME);
817 }
818
819 /* unmute any active DACs */
820 list_for_each_entry(rtd, &card->rtd_list, list) {
821
822 if (rtd->dai_link->ignore_suspend)
823 continue;
824
825 for (i = 0; i < rtd->num_codecs; i++) {
826 struct snd_soc_dai *dai = rtd->codec_dais[i];
827 struct snd_soc_dai_driver *drv = dai->driver;
828
829 if (drv->ops->digital_mute && dai->playback_active)
830 drv->ops->digital_mute(dai, 0);
831 }
832 }
833
834 list_for_each_entry(rtd, &card->rtd_list, list) {
835 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
836
837 if (rtd->dai_link->ignore_suspend)
838 continue;
839
840 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
841 cpu_dai->driver->resume(cpu_dai);
842 }
843
844 if (card->resume_post)
845 card->resume_post(card);
846
847 dev_dbg(card->dev, "ASoC: resume work completed\n");
848
849 /* Recheck all endpoints too, their state is affected by suspend */
850 dapm_mark_endpoints_dirty(card);
851 snd_soc_dapm_sync(&card->dapm);
852
853 /* userspace can access us now we are back as we were before */
854 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
855}
856
857/* powers up audio subsystem after a suspend */
858int snd_soc_resume(struct device *dev)
859{
860 struct snd_soc_card *card = dev_get_drvdata(dev);
861 bool bus_control = false;
862 struct snd_soc_pcm_runtime *rtd;
863
864 /* If the card is not initialized yet there is nothing to do */
865 if (!card->instantiated)
866 return 0;
867
868 /* activate pins from sleep state */
869 list_for_each_entry(rtd, &card->rtd_list, list) {
870 struct snd_soc_dai **codec_dais = rtd->codec_dais;
871 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
872 int j;
873
874 if (cpu_dai->active)
875 pinctrl_pm_select_default_state(cpu_dai->dev);
876
877 for (j = 0; j < rtd->num_codecs; j++) {
878 struct snd_soc_dai *codec_dai = codec_dais[j];
879 if (codec_dai->active)
880 pinctrl_pm_select_default_state(codec_dai->dev);
881 }
882 }
883
884 /*
885 * DAIs that also act as the control bus master might have other drivers
886 * hanging off them so need to resume immediately. Other drivers don't
887 * have that problem and may take a substantial amount of time to resume
888 * due to I/O costs and anti-pop so handle them out of line.
889 */
890 list_for_each_entry(rtd, &card->rtd_list, list) {
891 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
892 bus_control |= cpu_dai->driver->bus_control;
893 }
894 if (bus_control) {
895 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
896 soc_resume_deferred(&card->deferred_resume_work);
897 } else {
898 dev_dbg(dev, "ASoC: Scheduling resume work\n");
899 if (!schedule_work(&card->deferred_resume_work))
900 dev_err(dev, "ASoC: resume work item may be lost\n");
901 }
902
903 return 0;
904}
905EXPORT_SYMBOL_GPL(snd_soc_resume);
906#else
907#define snd_soc_suspend NULL
908#define snd_soc_resume NULL
909#endif
910
911static const struct snd_soc_dai_ops null_dai_ops = {
912};
913
914static struct snd_soc_component *soc_find_component(
915 const struct device_node *of_node, const char *name)
916{
917 struct snd_soc_component *component;
918
919 lockdep_assert_held(&client_mutex);
920
921 list_for_each_entry(component, &component_list, list) {
922 if (of_node) {
923 if (component->dev->of_node == of_node)
924 return component;
925 } else if (strcmp(component->name, name) == 0) {
926 return component;
927 }
928 }
929
930 return NULL;
931}
932
933/**
934 * snd_soc_find_dai - Find a registered DAI
935 *
936 * @dlc: name of the DAI and optional component info to match
937 *
938 * This function will search all regsitered components and their DAIs to
939 * find the DAI of the same name. The component's of_node and name
940 * should also match if being specified.
941 *
942 * Return: pointer of DAI, or NULL if not found.
943 */
944struct snd_soc_dai *snd_soc_find_dai(
945 const struct snd_soc_dai_link_component *dlc)
946{
947 struct snd_soc_component *component;
948 struct snd_soc_dai *dai;
949 struct device_node *component_of_node;
950
951 lockdep_assert_held(&client_mutex);
952
953 /* Find CPU DAI from registered DAIs*/
954 list_for_each_entry(component, &component_list, list) {
955 component_of_node = component->dev->of_node;
956 if (!component_of_node && component->dev->parent)
957 component_of_node = component->dev->parent->of_node;
958
959 if (dlc->of_node && component_of_node != dlc->of_node)
960 continue;
961 if (dlc->name && strcmp(component->name, dlc->name))
962 continue;
963 list_for_each_entry(dai, &component->dai_list, list) {
964 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
965 continue;
966
967 return dai;
968 }
969 }
970
971 return NULL;
972}
973EXPORT_SYMBOL_GPL(snd_soc_find_dai);
974
975
976/**
977 * snd_soc_find_dai_link - Find a DAI link
978 *
979 * @card: soc card
980 * @id: DAI link ID to match
981 * @name: DAI link name to match, optional
982 * @stream name: DAI link stream name to match, optional
983 *
984 * This function will search all existing DAI links of the soc card to
985 * find the link of the same ID. Since DAI links may not have their
986 * unique ID, so name and stream name should also match if being
987 * specified.
988 *
989 * Return: pointer of DAI link, or NULL if not found.
990 */
991struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
992 int id, const char *name,
993 const char *stream_name)
994{
995 struct snd_soc_dai_link *link, *_link;
996
997 lockdep_assert_held(&client_mutex);
998
999 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1000 if (link->id != id)
1001 continue;
1002
1003 if (name && (!link->name || strcmp(name, link->name)))
1004 continue;
1005
1006 if (stream_name && (!link->stream_name
1007 || strcmp(stream_name, link->stream_name)))
1008 continue;
1009
1010 return link;
1011 }
1012
1013 return NULL;
1014}
1015EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1016
1017static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1018 struct snd_soc_dai_link *dai_link)
1019{
1020 struct snd_soc_pcm_runtime *rtd;
1021
1022 list_for_each_entry(rtd, &card->rtd_list, list) {
1023 if (rtd->dai_link == dai_link)
1024 return true;
1025 }
1026
1027 return false;
1028}
1029
1030static int soc_bind_dai_link(struct snd_soc_card *card,
1031 struct snd_soc_dai_link *dai_link)
1032{
1033 struct snd_soc_pcm_runtime *rtd;
1034 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1035 struct snd_soc_dai_link_component cpu_dai_component;
1036 struct snd_soc_dai **codec_dais;
1037 struct snd_soc_platform *platform;
1038 struct device_node *platform_of_node;
1039 const char *platform_name;
1040 int i;
1041
1042 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1043
1044 if (soc_is_dai_link_bound(card, dai_link)) {
1045 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1046 dai_link->name);
1047 return 0;
1048 }
1049
1050 rtd = soc_new_pcm_runtime(card, dai_link);
1051 if (!rtd)
1052 return -ENOMEM;
1053
1054 cpu_dai_component.name = dai_link->cpu_name;
1055 cpu_dai_component.of_node = dai_link->cpu_of_node;
1056 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1057 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1058 if (!rtd->cpu_dai) {
1059 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1060 dai_link->cpu_dai_name);
1061 goto _err_defer;
1062 }
1063
1064 rtd->num_codecs = dai_link->num_codecs;
1065
1066 /* Find CODEC from registered CODECs */
1067 codec_dais = rtd->codec_dais;
1068 for (i = 0; i < rtd->num_codecs; i++) {
1069 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1070 if (!codec_dais[i]) {
1071 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1072 codecs[i].dai_name);
1073 goto _err_defer;
1074 }
1075 }
1076
1077 /* Single codec links expect codec and codec_dai in runtime data */
1078 rtd->codec_dai = codec_dais[0];
1079 rtd->codec = rtd->codec_dai->codec;
1080
1081 /* if there's no platform we match on the empty platform */
1082 platform_name = dai_link->platform_name;
1083 if (!platform_name && !dai_link->platform_of_node)
1084 platform_name = "snd-soc-dummy";
1085
1086 /* find one from the set of registered platforms */
1087 list_for_each_entry(platform, &platform_list, list) {
1088 platform_of_node = platform->dev->of_node;
1089 if (!platform_of_node && platform->dev->parent->of_node)
1090 platform_of_node = platform->dev->parent->of_node;
1091
1092 if (dai_link->platform_of_node) {
1093 if (platform_of_node != dai_link->platform_of_node)
1094 continue;
1095 } else {
1096 if (strcmp(platform->component.name, platform_name))
1097 continue;
1098 }
1099
1100 rtd->platform = platform;
1101 }
1102 if (!rtd->platform) {
1103 dev_err(card->dev, "ASoC: platform %s not registered\n",
1104 dai_link->platform_name);
1105 goto _err_defer;
1106 }
1107
1108 soc_add_pcm_runtime(card, rtd);
1109 return 0;
1110
1111_err_defer:
1112 soc_free_pcm_runtime(rtd);
1113 return -EPROBE_DEFER;
1114}
1115
1116static void soc_remove_component(struct snd_soc_component *component)
1117{
1118 if (!component->card)
1119 return;
1120
1121 list_del(&component->card_list);
1122
1123 if (component->remove)
1124 component->remove(component);
1125
1126 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1127
1128 soc_cleanup_component_debugfs(component);
1129 component->card = NULL;
1130 module_put(component->dev->driver->owner);
1131}
1132
1133static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1134{
1135 int err;
1136
1137 if (dai && dai->probed &&
1138 dai->driver->remove_order == order) {
1139 if (dai->driver->remove) {
1140 err = dai->driver->remove(dai);
1141 if (err < 0)
1142 dev_err(dai->dev,
1143 "ASoC: failed to remove %s: %d\n",
1144 dai->name, err);
1145 }
1146 dai->probed = 0;
1147 }
1148}
1149
1150static void soc_remove_link_dais(struct snd_soc_card *card,
1151 struct snd_soc_pcm_runtime *rtd, int order)
1152{
1153 int i;
1154
1155 /* unregister the rtd device */
1156 if (rtd->dev_registered) {
1157 device_unregister(rtd->dev);
1158 rtd->dev_registered = 0;
1159 }
1160
1161 /* remove the CODEC DAI */
1162 for (i = 0; i < rtd->num_codecs; i++)
1163 soc_remove_dai(rtd->codec_dais[i], order);
1164
1165 soc_remove_dai(rtd->cpu_dai, order);
1166}
1167
1168static void soc_remove_link_components(struct snd_soc_card *card,
1169 struct snd_soc_pcm_runtime *rtd, int order)
1170{
1171 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1172 struct snd_soc_platform *platform = rtd->platform;
1173 struct snd_soc_component *component;
1174 int i;
1175
1176 /* remove the platform */
1177 if (platform && platform->component.driver->remove_order == order)
1178 soc_remove_component(&platform->component);
1179
1180 /* remove the CODEC-side CODEC */
1181 for (i = 0; i < rtd->num_codecs; i++) {
1182 component = rtd->codec_dais[i]->component;
1183 if (component->driver->remove_order == order)
1184 soc_remove_component(component);
1185 }
1186
1187 /* remove any CPU-side CODEC */
1188 if (cpu_dai) {
1189 if (cpu_dai->component->driver->remove_order == order)
1190 soc_remove_component(cpu_dai->component);
1191 }
1192}
1193
1194static void soc_remove_dai_links(struct snd_soc_card *card)
1195{
1196 int order;
1197 struct snd_soc_pcm_runtime *rtd;
1198 struct snd_soc_dai_link *link, *_link;
1199
1200 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1201 order++) {
1202 list_for_each_entry(rtd, &card->rtd_list, list)
1203 soc_remove_link_dais(card, rtd, order);
1204 }
1205
1206 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1207 order++) {
1208 list_for_each_entry(rtd, &card->rtd_list, list)
1209 soc_remove_link_components(card, rtd, order);
1210 }
1211
1212 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1213 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1214 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1215 link->name);
1216
1217 list_del(&link->list);
1218 card->num_dai_links--;
1219 }
1220}
1221
1222static int snd_soc_init_multicodec(struct snd_soc_card *card,
1223 struct snd_soc_dai_link *dai_link)
1224{
1225 /* Legacy codec/codec_dai link is a single entry in multicodec */
1226 if (dai_link->codec_name || dai_link->codec_of_node ||
1227 dai_link->codec_dai_name) {
1228 dai_link->num_codecs = 1;
1229
1230 dai_link->codecs = devm_kzalloc(card->dev,
1231 sizeof(struct snd_soc_dai_link_component),
1232 GFP_KERNEL);
1233 if (!dai_link->codecs)
1234 return -ENOMEM;
1235
1236 dai_link->codecs[0].name = dai_link->codec_name;
1237 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1238 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1239 }
1240
1241 if (!dai_link->codecs) {
1242 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1243 return -EINVAL;
1244 }
1245
1246 return 0;
1247}
1248
1249static int soc_init_dai_link(struct snd_soc_card *card,
1250 struct snd_soc_dai_link *link)
1251{
1252 int i, ret;
1253
1254 ret = snd_soc_init_multicodec(card, link);
1255 if (ret) {
1256 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1257 return ret;
1258 }
1259
1260 for (i = 0; i < link->num_codecs; i++) {
1261 /*
1262 * Codec must be specified by 1 of name or OF node,
1263 * not both or neither.
1264 */
1265 if (!!link->codecs[i].name ==
1266 !!link->codecs[i].of_node) {
1267 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1268 link->name);
1269 return -EINVAL;
1270 }
1271 /* Codec DAI name must be specified */
1272 if (!link->codecs[i].dai_name) {
1273 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1274 link->name);
1275 return -EINVAL;
1276 }
1277 }
1278
1279 /*
1280 * Platform may be specified by either name or OF node, but
1281 * can be left unspecified, and a dummy platform will be used.
1282 */
1283 if (link->platform_name && link->platform_of_node) {
1284 dev_err(card->dev,
1285 "ASoC: Both platform name/of_node are set for %s\n",
1286 link->name);
1287 return -EINVAL;
1288 }
1289
1290 /*
1291 * CPU device may be specified by either name or OF node, but
1292 * can be left unspecified, and will be matched based on DAI
1293 * name alone..
1294 */
1295 if (link->cpu_name && link->cpu_of_node) {
1296 dev_err(card->dev,
1297 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1298 link->name);
1299 return -EINVAL;
1300 }
1301 /*
1302 * At least one of CPU DAI name or CPU device name/node must be
1303 * specified
1304 */
1305 if (!link->cpu_dai_name &&
1306 !(link->cpu_name || link->cpu_of_node)) {
1307 dev_err(card->dev,
1308 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1309 link->name);
1310 return -EINVAL;
1311 }
1312
1313 return 0;
1314}
1315
1316/**
1317 * snd_soc_add_dai_link - Add a DAI link dynamically
1318 * @card: The ASoC card to which the DAI link is added
1319 * @dai_link: The new DAI link to add
1320 *
1321 * This function adds a DAI link to the ASoC card's link list.
1322 *
1323 * Note: Topology can use this API to add DAI links when probing the
1324 * topology component. And machine drivers can still define static
1325 * DAI links in dai_link array.
1326 */
1327int snd_soc_add_dai_link(struct snd_soc_card *card,
1328 struct snd_soc_dai_link *dai_link)
1329{
1330 if (dai_link->dobj.type
1331 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1332 dev_err(card->dev, "Invalid dai link type %d\n",
1333 dai_link->dobj.type);
1334 return -EINVAL;
1335 }
1336
1337 lockdep_assert_held(&client_mutex);
1338 /* Notify the machine driver for extra initialization
1339 * on the link created by topology.
1340 */
1341 if (dai_link->dobj.type && card->add_dai_link)
1342 card->add_dai_link(card, dai_link);
1343
1344 list_add_tail(&dai_link->list, &card->dai_link_list);
1345 card->num_dai_links++;
1346
1347 return 0;
1348}
1349EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1350
1351/**
1352 * snd_soc_remove_dai_link - Remove a DAI link from the list
1353 * @card: The ASoC card that owns the link
1354 * @dai_link: The DAI link to remove
1355 *
1356 * This function removes a DAI link from the ASoC card's link list.
1357 *
1358 * For DAI links previously added by topology, topology should
1359 * remove them by using the dobj embedded in the link.
1360 */
1361void snd_soc_remove_dai_link(struct snd_soc_card *card,
1362 struct snd_soc_dai_link *dai_link)
1363{
1364 struct snd_soc_dai_link *link, *_link;
1365
1366 if (dai_link->dobj.type
1367 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1368 dev_err(card->dev, "Invalid dai link type %d\n",
1369 dai_link->dobj.type);
1370 return;
1371 }
1372
1373 lockdep_assert_held(&client_mutex);
1374 /* Notify the machine driver for extra destruction
1375 * on the link created by topology.
1376 */
1377 if (dai_link->dobj.type && card->remove_dai_link)
1378 card->remove_dai_link(card, dai_link);
1379
1380 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1381 if (link == dai_link) {
1382 list_del(&link->list);
1383 card->num_dai_links--;
1384 return;
1385 }
1386 }
1387}
1388EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1389
1390static void soc_set_name_prefix(struct snd_soc_card *card,
1391 struct snd_soc_component *component)
1392{
1393 int i;
1394
1395 if (card->codec_conf == NULL)
1396 return;
1397
1398 for (i = 0; i < card->num_configs; i++) {
1399 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1400 if (map->of_node && component->dev->of_node != map->of_node)
1401 continue;
1402 if (map->dev_name && strcmp(component->name, map->dev_name))
1403 continue;
1404 component->name_prefix = map->name_prefix;
1405 break;
1406 }
1407}
1408
1409static int soc_probe_component(struct snd_soc_card *card,
1410 struct snd_soc_component *component)
1411{
1412 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1413 struct snd_soc_dai *dai;
1414 int ret;
1415
1416 if (!strcmp(component->name, "snd-soc-dummy"))
1417 return 0;
1418
1419 if (component->card) {
1420 if (component->card != card) {
1421 dev_err(component->dev,
1422 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1423 card->name, component->card->name);
1424 return -ENODEV;
1425 }
1426 return 0;
1427 }
1428
1429 if (!try_module_get(component->dev->driver->owner))
1430 return -ENODEV;
1431
1432 component->card = card;
1433 dapm->card = card;
1434 soc_set_name_prefix(card, component);
1435
1436 soc_init_component_debugfs(component);
1437
1438 if (component->dapm_widgets) {
1439 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1440 component->num_dapm_widgets);
1441
1442 if (ret != 0) {
1443 dev_err(component->dev,
1444 "Failed to create new controls %d\n", ret);
1445 goto err_probe;
1446 }
1447 }
1448
1449 list_for_each_entry(dai, &component->dai_list, list) {
1450 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1451 if (ret != 0) {
1452 dev_err(component->dev,
1453 "Failed to create DAI widgets %d\n", ret);
1454 goto err_probe;
1455 }
1456 }
1457
1458 if (component->probe) {
1459 ret = component->probe(component);
1460 if (ret < 0) {
1461 dev_err(component->dev,
1462 "ASoC: failed to probe component %d\n", ret);
1463 goto err_probe;
1464 }
1465
1466 WARN(dapm->idle_bias_off &&
1467 dapm->bias_level != SND_SOC_BIAS_OFF,
1468 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1469 component->name);
1470 }
1471
1472 /* machine specific init */
1473 if (component->init) {
1474 ret = component->init(component);
1475 if (ret < 0) {
1476 dev_err(component->dev,
1477 "Failed to do machine specific init %d\n", ret);
1478 goto err_probe;
1479 }
1480 }
1481
1482 if (component->controls)
1483 snd_soc_add_component_controls(component, component->controls,
1484 component->num_controls);
1485 if (component->dapm_routes)
1486 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1487 component->num_dapm_routes);
1488
1489 list_add(&dapm->list, &card->dapm_list);
1490 list_add(&component->card_list, &card->component_dev_list);
1491
1492 return 0;
1493
1494err_probe:
1495 soc_cleanup_component_debugfs(component);
1496 component->card = NULL;
1497 module_put(component->dev->driver->owner);
1498
1499 return ret;
1500}
1501
1502static void rtd_release(struct device *dev)
1503{
1504 kfree(dev);
1505}
1506
1507static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1508 const char *name)
1509{
1510 int ret = 0;
1511
1512 /* register the rtd device */
1513 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1514 if (!rtd->dev)
1515 return -ENOMEM;
1516 device_initialize(rtd->dev);
1517 rtd->dev->parent = rtd->card->dev;
1518 rtd->dev->release = rtd_release;
1519 rtd->dev->groups = soc_dev_attr_groups;
1520 dev_set_name(rtd->dev, "%s", name);
1521 dev_set_drvdata(rtd->dev, rtd);
1522 mutex_init(&rtd->pcm_mutex);
1523 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1524 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1525 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1526 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1527 ret = device_add(rtd->dev);
1528 if (ret < 0) {
1529 /* calling put_device() here to free the rtd->dev */
1530 put_device(rtd->dev);
1531 dev_err(rtd->card->dev,
1532 "ASoC: failed to register runtime device: %d\n", ret);
1533 return ret;
1534 }
1535 rtd->dev_registered = 1;
1536 return 0;
1537}
1538
1539static int soc_probe_link_components(struct snd_soc_card *card,
1540 struct snd_soc_pcm_runtime *rtd,
1541 int order)
1542{
1543 struct snd_soc_platform *platform = rtd->platform;
1544 struct snd_soc_component *component;
1545 int i, ret;
1546
1547 /* probe the CPU-side component, if it is a CODEC */
1548 component = rtd->cpu_dai->component;
1549 if (component->driver->probe_order == order) {
1550 ret = soc_probe_component(card, component);
1551 if (ret < 0)
1552 return ret;
1553 }
1554
1555 /* probe the CODEC-side components */
1556 for (i = 0; i < rtd->num_codecs; i++) {
1557 component = rtd->codec_dais[i]->component;
1558 if (component->driver->probe_order == order) {
1559 ret = soc_probe_component(card, component);
1560 if (ret < 0)
1561 return ret;
1562 }
1563 }
1564
1565 /* probe the platform */
1566 if (platform->component.driver->probe_order == order) {
1567 ret = soc_probe_component(card, &platform->component);
1568 if (ret < 0)
1569 return ret;
1570 }
1571
1572 return 0;
1573}
1574
1575static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1576{
1577 int ret;
1578
1579 if (!dai->probed && dai->driver->probe_order == order) {
1580 if (dai->driver->probe) {
1581 ret = dai->driver->probe(dai);
1582 if (ret < 0) {
1583 dev_err(dai->dev,
1584 "ASoC: failed to probe DAI %s: %d\n",
1585 dai->name, ret);
1586 return ret;
1587 }
1588 }
1589
1590 dai->probed = 1;
1591 }
1592
1593 return 0;
1594}
1595
1596static int soc_link_dai_widgets(struct snd_soc_card *card,
1597 struct snd_soc_dai_link *dai_link,
1598 struct snd_soc_pcm_runtime *rtd)
1599{
1600 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1601 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1602 struct snd_soc_dapm_widget *sink, *source;
1603 int ret;
1604
1605 if (rtd->num_codecs > 1)
1606 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1607
1608 /* link the DAI widgets */
1609 sink = codec_dai->playback_widget;
1610 source = cpu_dai->capture_widget;
1611 if (sink && source) {
1612 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1613 dai_link->num_params,
1614 source, sink);
1615 if (ret != 0) {
1616 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1617 sink->name, source->name, ret);
1618 return ret;
1619 }
1620 }
1621
1622 sink = cpu_dai->playback_widget;
1623 source = codec_dai->capture_widget;
1624 if (sink && source) {
1625 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1626 dai_link->num_params,
1627 source, sink);
1628 if (ret != 0) {
1629 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1630 sink->name, source->name, ret);
1631 return ret;
1632 }
1633 }
1634
1635 return 0;
1636}
1637
1638static int soc_probe_link_dais(struct snd_soc_card *card,
1639 struct snd_soc_pcm_runtime *rtd, int order)
1640{
1641 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1642 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1643 int i, ret;
1644
1645 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1646 card->name, rtd->num, order);
1647
1648 /* set default power off timeout */
1649 rtd->pmdown_time = pmdown_time;
1650
1651 ret = soc_probe_dai(cpu_dai, order);
1652 if (ret)
1653 return ret;
1654
1655 /* probe the CODEC DAI */
1656 for (i = 0; i < rtd->num_codecs; i++) {
1657 ret = soc_probe_dai(rtd->codec_dais[i], order);
1658 if (ret)
1659 return ret;
1660 }
1661
1662 /* complete DAI probe during last probe */
1663 if (order != SND_SOC_COMP_ORDER_LAST)
1664 return 0;
1665
1666 /* do machine specific initialization */
1667 if (dai_link->init) {
1668 ret = dai_link->init(rtd);
1669 if (ret < 0) {
1670 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1671 dai_link->name, ret);
1672 return ret;
1673 }
1674 }
1675
1676 if (dai_link->dai_fmt)
1677 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1678
1679 ret = soc_post_component_init(rtd, dai_link->name);
1680 if (ret)
1681 return ret;
1682
1683#ifdef CONFIG_DEBUG_FS
1684 /* add DPCM sysfs entries */
1685 if (dai_link->dynamic)
1686 soc_dpcm_debugfs_add(rtd);
1687#endif
1688
1689 if (cpu_dai->driver->compress_new) {
1690 /*create compress_device"*/
1691 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1692 if (ret < 0) {
1693 dev_err(card->dev, "ASoC: can't create compress %s\n",
1694 dai_link->stream_name);
1695 return ret;
1696 }
1697 } else {
1698
1699 if (!dai_link->params) {
1700 /* create the pcm */
1701 ret = soc_new_pcm(rtd, rtd->num);
1702 if (ret < 0) {
1703 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1704 dai_link->stream_name, ret);
1705 return ret;
1706 }
1707 } else {
1708 INIT_DELAYED_WORK(&rtd->delayed_work,
1709 codec2codec_close_delayed_work);
1710
1711 /* link the DAI widgets */
1712 ret = soc_link_dai_widgets(card, dai_link, rtd);
1713 if (ret)
1714 return ret;
1715 }
1716 }
1717
1718 return 0;
1719}
1720
1721static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1722{
1723 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1724 struct snd_soc_component *component;
1725 const char *name;
1726 struct device_node *codec_of_node;
1727
1728 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1729 /* codecs, usually analog devices */
1730 name = aux_dev->codec_name;
1731 codec_of_node = aux_dev->codec_of_node;
1732 component = soc_find_component(codec_of_node, name);
1733 if (!component) {
1734 if (codec_of_node)
1735 name = of_node_full_name(codec_of_node);
1736 goto err_defer;
1737 }
1738 } else if (aux_dev->name) {
1739 /* generic components */
1740 name = aux_dev->name;
1741 component = soc_find_component(NULL, name);
1742 if (!component)
1743 goto err_defer;
1744 } else {
1745 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1746 return -EINVAL;
1747 }
1748
1749 component->init = aux_dev->init;
1750 component->auxiliary = 1;
1751 list_add(&component->card_aux_list, &card->aux_comp_list);
1752
1753 return 0;
1754
1755err_defer:
1756 dev_err(card->dev, "ASoC: %s not registered\n", name);
1757 return -EPROBE_DEFER;
1758}
1759
1760static int soc_probe_aux_devices(struct snd_soc_card *card)
1761{
1762 struct snd_soc_component *comp, *tmp;
1763 int order;
1764 int ret;
1765
1766 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1767 order++) {
1768 list_for_each_entry_safe(comp, tmp, &card->aux_comp_list,
1769 card_aux_list) {
1770 if (comp->driver->probe_order == order) {
1771 ret = soc_probe_component(card, comp);
1772 if (ret < 0) {
1773 dev_err(card->dev,
1774 "ASoC: failed to probe aux component %s %d\n",
1775 comp->name, ret);
1776 return ret;
1777 }
1778 list_del(&comp->card_aux_list);
1779 }
1780 }
1781 }
1782
1783 return 0;
1784}
1785
1786static void soc_remove_aux_devices(struct snd_soc_card *card)
1787{
1788 struct snd_soc_component *comp, *_comp;
1789 int order;
1790
1791 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1792 order++) {
1793 list_for_each_entry_safe(comp, _comp,
1794 &card->component_dev_list, card_list) {
1795
1796 if (!comp->auxiliary)
1797 continue;
1798
1799 if (comp->driver->remove_order == order) {
1800 soc_remove_component(comp);
1801 comp->auxiliary = 0;
1802 }
1803 }
1804 }
1805}
1806
1807static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1808{
1809 int ret;
1810
1811 if (codec->cache_init)
1812 return 0;
1813
1814 ret = snd_soc_cache_init(codec);
1815 if (ret < 0) {
1816 dev_err(codec->dev,
1817 "ASoC: Failed to set cache compression type: %d\n",
1818 ret);
1819 return ret;
1820 }
1821 codec->cache_init = 1;
1822 return 0;
1823}
1824
1825/**
1826 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1827 * @rtd: The runtime for which the DAI link format should be changed
1828 * @dai_fmt: The new DAI link format
1829 *
1830 * This function updates the DAI link format for all DAIs connected to the DAI
1831 * link for the specified runtime.
1832 *
1833 * Note: For setups with a static format set the dai_fmt field in the
1834 * corresponding snd_dai_link struct instead of using this function.
1835 *
1836 * Returns 0 on success, otherwise a negative error code.
1837 */
1838int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1839 unsigned int dai_fmt)
1840{
1841 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1842 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1843 unsigned int i;
1844 int ret;
1845
1846 for (i = 0; i < rtd->num_codecs; i++) {
1847 struct snd_soc_dai *codec_dai = codec_dais[i];
1848
1849 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1850 if (ret != 0 && ret != -ENOTSUPP) {
1851 dev_warn(codec_dai->dev,
1852 "ASoC: Failed to set DAI format: %d\n", ret);
1853 return ret;
1854 }
1855 }
1856
1857 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1858 if (cpu_dai->codec) {
1859 unsigned int inv_dai_fmt;
1860
1861 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1862 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1863 case SND_SOC_DAIFMT_CBM_CFM:
1864 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1865 break;
1866 case SND_SOC_DAIFMT_CBM_CFS:
1867 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1868 break;
1869 case SND_SOC_DAIFMT_CBS_CFM:
1870 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1871 break;
1872 case SND_SOC_DAIFMT_CBS_CFS:
1873 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1874 break;
1875 }
1876
1877 dai_fmt = inv_dai_fmt;
1878 }
1879
1880 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1881 if (ret != 0 && ret != -ENOTSUPP) {
1882 dev_warn(cpu_dai->dev,
1883 "ASoC: Failed to set DAI format: %d\n", ret);
1884 return ret;
1885 }
1886
1887 return 0;
1888}
1889EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1890
1891static int snd_soc_instantiate_card(struct snd_soc_card *card)
1892{
1893 struct snd_soc_codec *codec;
1894 struct snd_soc_pcm_runtime *rtd;
1895 struct snd_soc_dai_link *dai_link;
1896 int ret, i, order;
1897
1898 mutex_lock(&client_mutex);
1899 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1900
1901 /* bind DAIs */
1902 for (i = 0; i < card->num_links; i++) {
1903 ret = soc_bind_dai_link(card, &card->dai_link[i]);
1904 if (ret != 0)
1905 goto base_error;
1906 }
1907
1908 /* bind aux_devs too */
1909 for (i = 0; i < card->num_aux_devs; i++) {
1910 ret = soc_bind_aux_dev(card, i);
1911 if (ret != 0)
1912 goto base_error;
1913 }
1914
1915 /* add predefined DAI links to the list */
1916 for (i = 0; i < card->num_links; i++)
1917 snd_soc_add_dai_link(card, card->dai_link+i);
1918
1919 /* initialize the register cache for each available codec */
1920 list_for_each_entry(codec, &codec_list, list) {
1921 if (codec->cache_init)
1922 continue;
1923 ret = snd_soc_init_codec_cache(codec);
1924 if (ret < 0)
1925 goto base_error;
1926 }
1927
1928 /* card bind complete so register a sound card */
1929 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1930 card->owner, 0, &card->snd_card);
1931 if (ret < 0) {
1932 dev_err(card->dev,
1933 "ASoC: can't create sound card for card %s: %d\n",
1934 card->name, ret);
1935 goto base_error;
1936 }
1937
1938 soc_init_card_debugfs(card);
1939
1940 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1941 card->dapm.dev = card->dev;
1942 card->dapm.card = card;
1943 list_add(&card->dapm.list, &card->dapm_list);
1944
1945#ifdef CONFIG_DEBUG_FS
1946 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1947#endif
1948
1949#ifdef CONFIG_PM_SLEEP
1950 /* deferred resume work */
1951 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1952#endif
1953
1954 if (card->dapm_widgets)
1955 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1956 card->num_dapm_widgets);
1957
1958 if (card->of_dapm_widgets)
1959 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1960 card->num_of_dapm_widgets);
1961
1962 /* initialise the sound card only once */
1963 if (card->probe) {
1964 ret = card->probe(card);
1965 if (ret < 0)
1966 goto card_probe_error;
1967 }
1968
1969 /* probe all components used by DAI links on this card */
1970 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1971 order++) {
1972 list_for_each_entry(rtd, &card->rtd_list, list) {
1973 ret = soc_probe_link_components(card, rtd, order);
1974 if (ret < 0) {
1975 dev_err(card->dev,
1976 "ASoC: failed to instantiate card %d\n",
1977 ret);
1978 goto probe_dai_err;
1979 }
1980 }
1981 }
1982
1983 /* probe auxiliary components */
1984 ret = soc_probe_aux_devices(card);
1985 if (ret < 0)
1986 goto probe_dai_err;
1987
1988 /* Find new DAI links added during probing components and bind them.
1989 * Components with topology may bring new DAIs and DAI links.
1990 */
1991 list_for_each_entry(dai_link, &card->dai_link_list, list) {
1992 if (soc_is_dai_link_bound(card, dai_link))
1993 continue;
1994
1995 ret = soc_init_dai_link(card, dai_link);
1996 if (ret)
1997 goto probe_dai_err;
1998 ret = soc_bind_dai_link(card, dai_link);
1999 if (ret)
2000 goto probe_dai_err;
2001 }
2002
2003 /* probe all DAI links on this card */
2004 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2005 order++) {
2006 list_for_each_entry(rtd, &card->rtd_list, list) {
2007 ret = soc_probe_link_dais(card, rtd, order);
2008 if (ret < 0) {
2009 dev_err(card->dev,
2010 "ASoC: failed to instantiate card %d\n",
2011 ret);
2012 goto probe_dai_err;
2013 }
2014 }
2015 }
2016
2017 snd_soc_dapm_link_dai_widgets(card);
2018 snd_soc_dapm_connect_dai_link_widgets(card);
2019
2020 if (card->controls)
2021 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2022
2023 if (card->dapm_routes)
2024 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2025 card->num_dapm_routes);
2026
2027 if (card->of_dapm_routes)
2028 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2029 card->num_of_dapm_routes);
2030
2031 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2032 "%s", card->name);
2033 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2034 "%s", card->long_name ? card->long_name : card->name);
2035 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2036 "%s", card->driver_name ? card->driver_name : card->name);
2037 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2038 switch (card->snd_card->driver[i]) {
2039 case '_':
2040 case '-':
2041 case '\0':
2042 break;
2043 default:
2044 if (!isalnum(card->snd_card->driver[i]))
2045 card->snd_card->driver[i] = '_';
2046 break;
2047 }
2048 }
2049
2050 if (card->late_probe) {
2051 ret = card->late_probe(card);
2052 if (ret < 0) {
2053 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2054 card->name, ret);
2055 goto probe_aux_dev_err;
2056 }
2057 }
2058
2059 snd_soc_dapm_new_widgets(card);
2060
2061 ret = snd_card_register(card->snd_card);
2062 if (ret < 0) {
2063 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2064 ret);
2065 goto probe_aux_dev_err;
2066 }
2067
2068 card->instantiated = 1;
2069 snd_soc_dapm_sync(&card->dapm);
2070 mutex_unlock(&card->mutex);
2071 mutex_unlock(&client_mutex);
2072
2073 return 0;
2074
2075probe_aux_dev_err:
2076 soc_remove_aux_devices(card);
2077
2078probe_dai_err:
2079 soc_remove_dai_links(card);
2080
2081card_probe_error:
2082 if (card->remove)
2083 card->remove(card);
2084
2085 snd_soc_dapm_free(&card->dapm);
2086 soc_cleanup_card_debugfs(card);
2087 snd_card_free(card->snd_card);
2088
2089base_error:
2090 soc_remove_pcm_runtimes(card);
2091 mutex_unlock(&card->mutex);
2092 mutex_unlock(&client_mutex);
2093
2094 return ret;
2095}
2096
2097/* probes a new socdev */
2098static int soc_probe(struct platform_device *pdev)
2099{
2100 struct snd_soc_card *card = platform_get_drvdata(pdev);
2101
2102 /*
2103 * no card, so machine driver should be registering card
2104 * we should not be here in that case so ret error
2105 */
2106 if (!card)
2107 return -EINVAL;
2108
2109 dev_warn(&pdev->dev,
2110 "ASoC: machine %s should use snd_soc_register_card()\n",
2111 card->name);
2112
2113 /* Bodge while we unpick instantiation */
2114 card->dev = &pdev->dev;
2115
2116 return snd_soc_register_card(card);
2117}
2118
2119static int soc_cleanup_card_resources(struct snd_soc_card *card)
2120{
2121 struct snd_soc_pcm_runtime *rtd;
2122
2123 /* make sure any delayed work runs */
2124 list_for_each_entry(rtd, &card->rtd_list, list)
2125 flush_delayed_work(&rtd->delayed_work);
2126
2127 /* remove and free each DAI */
2128 soc_remove_dai_links(card);
2129 soc_remove_pcm_runtimes(card);
2130
2131 /* remove auxiliary devices */
2132 soc_remove_aux_devices(card);
2133
2134 snd_soc_dapm_free(&card->dapm);
2135 soc_cleanup_card_debugfs(card);
2136
2137 /* remove the card */
2138 if (card->remove)
2139 card->remove(card);
2140
2141 snd_card_free(card->snd_card);
2142 return 0;
2143
2144}
2145
2146/* removes a socdev */
2147static int soc_remove(struct platform_device *pdev)
2148{
2149 struct snd_soc_card *card = platform_get_drvdata(pdev);
2150
2151 snd_soc_unregister_card(card);
2152 return 0;
2153}
2154
2155int snd_soc_poweroff(struct device *dev)
2156{
2157 struct snd_soc_card *card = dev_get_drvdata(dev);
2158 struct snd_soc_pcm_runtime *rtd;
2159
2160 if (!card->instantiated)
2161 return 0;
2162
2163 /* Flush out pmdown_time work - we actually do want to run it
2164 * now, we're shutting down so no imminent restart. */
2165 list_for_each_entry(rtd, &card->rtd_list, list)
2166 flush_delayed_work(&rtd->delayed_work);
2167
2168 snd_soc_dapm_shutdown(card);
2169
2170 /* deactivate pins to sleep state */
2171 list_for_each_entry(rtd, &card->rtd_list, list) {
2172 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2173 int i;
2174
2175 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2176 for (i = 0; i < rtd->num_codecs; i++) {
2177 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2178 pinctrl_pm_select_sleep_state(codec_dai->dev);
2179 }
2180 }
2181
2182 return 0;
2183}
2184EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2185
2186const struct dev_pm_ops snd_soc_pm_ops = {
2187 .suspend = snd_soc_suspend,
2188 .resume = snd_soc_resume,
2189 .freeze = snd_soc_suspend,
2190 .thaw = snd_soc_resume,
2191 .poweroff = snd_soc_poweroff,
2192 .restore = snd_soc_resume,
2193};
2194EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2195
2196/* ASoC platform driver */
2197static struct platform_driver soc_driver = {
2198 .driver = {
2199 .name = "soc-audio",
2200 .pm = &snd_soc_pm_ops,
2201 },
2202 .probe = soc_probe,
2203 .remove = soc_remove,
2204};
2205
2206/**
2207 * snd_soc_cnew - create new control
2208 * @_template: control template
2209 * @data: control private data
2210 * @long_name: control long name
2211 * @prefix: control name prefix
2212 *
2213 * Create a new mixer control from a template control.
2214 *
2215 * Returns 0 for success, else error.
2216 */
2217struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2218 void *data, const char *long_name,
2219 const char *prefix)
2220{
2221 struct snd_kcontrol_new template;
2222 struct snd_kcontrol *kcontrol;
2223 char *name = NULL;
2224
2225 memcpy(&template, _template, sizeof(template));
2226 template.index = 0;
2227
2228 if (!long_name)
2229 long_name = template.name;
2230
2231 if (prefix) {
2232 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2233 if (!name)
2234 return NULL;
2235
2236 template.name = name;
2237 } else {
2238 template.name = long_name;
2239 }
2240
2241 kcontrol = snd_ctl_new1(&template, data);
2242
2243 kfree(name);
2244
2245 return kcontrol;
2246}
2247EXPORT_SYMBOL_GPL(snd_soc_cnew);
2248
2249static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2250 const struct snd_kcontrol_new *controls, int num_controls,
2251 const char *prefix, void *data)
2252{
2253 int err, i;
2254
2255 for (i = 0; i < num_controls; i++) {
2256 const struct snd_kcontrol_new *control = &controls[i];
2257 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2258 control->name, prefix));
2259 if (err < 0) {
2260 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2261 control->name, err);
2262 return err;
2263 }
2264 }
2265
2266 return 0;
2267}
2268
2269struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2270 const char *name)
2271{
2272 struct snd_card *card = soc_card->snd_card;
2273 struct snd_kcontrol *kctl;
2274
2275 if (unlikely(!name))
2276 return NULL;
2277
2278 list_for_each_entry(kctl, &card->controls, list)
2279 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2280 return kctl;
2281 return NULL;
2282}
2283EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2284
2285/**
2286 * snd_soc_add_component_controls - Add an array of controls to a component.
2287 *
2288 * @component: Component to add controls to
2289 * @controls: Array of controls to add
2290 * @num_controls: Number of elements in the array
2291 *
2292 * Return: 0 for success, else error.
2293 */
2294int snd_soc_add_component_controls(struct snd_soc_component *component,
2295 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2296{
2297 struct snd_card *card = component->card->snd_card;
2298
2299 return snd_soc_add_controls(card, component->dev, controls,
2300 num_controls, component->name_prefix, component);
2301}
2302EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2303
2304/**
2305 * snd_soc_add_codec_controls - add an array of controls to a codec.
2306 * Convenience function to add a list of controls. Many codecs were
2307 * duplicating this code.
2308 *
2309 * @codec: codec to add controls to
2310 * @controls: array of controls to add
2311 * @num_controls: number of elements in the array
2312 *
2313 * Return 0 for success, else error.
2314 */
2315int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2316 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2317{
2318 return snd_soc_add_component_controls(&codec->component, controls,
2319 num_controls);
2320}
2321EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2322
2323/**
2324 * snd_soc_add_platform_controls - add an array of controls to a platform.
2325 * Convenience function to add a list of controls.
2326 *
2327 * @platform: platform to add controls to
2328 * @controls: array of controls to add
2329 * @num_controls: number of elements in the array
2330 *
2331 * Return 0 for success, else error.
2332 */
2333int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2334 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2335{
2336 return snd_soc_add_component_controls(&platform->component, controls,
2337 num_controls);
2338}
2339EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2340
2341/**
2342 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2343 * Convenience function to add a list of controls.
2344 *
2345 * @soc_card: SoC card to add controls to
2346 * @controls: array of controls to add
2347 * @num_controls: number of elements in the array
2348 *
2349 * Return 0 for success, else error.
2350 */
2351int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2352 const struct snd_kcontrol_new *controls, int num_controls)
2353{
2354 struct snd_card *card = soc_card->snd_card;
2355
2356 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2357 NULL, soc_card);
2358}
2359EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2360
2361/**
2362 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2363 * Convienience function to add a list of controls.
2364 *
2365 * @dai: DAI to add controls to
2366 * @controls: array of controls to add
2367 * @num_controls: number of elements in the array
2368 *
2369 * Return 0 for success, else error.
2370 */
2371int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2372 const struct snd_kcontrol_new *controls, int num_controls)
2373{
2374 struct snd_card *card = dai->component->card->snd_card;
2375
2376 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2377 NULL, dai);
2378}
2379EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2380
2381/**
2382 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2383 * @dai: DAI
2384 * @clk_id: DAI specific clock ID
2385 * @freq: new clock frequency in Hz
2386 * @dir: new clock direction - input/output.
2387 *
2388 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2389 */
2390int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2391 unsigned int freq, int dir)
2392{
2393 if (dai->driver && dai->driver->ops->set_sysclk)
2394 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2395 else if (dai->codec && dai->codec->driver->set_sysclk)
2396 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2397 freq, dir);
2398 else
2399 return -ENOTSUPP;
2400}
2401EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2402
2403/**
2404 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2405 * @codec: CODEC
2406 * @clk_id: DAI specific clock ID
2407 * @source: Source for the clock
2408 * @freq: new clock frequency in Hz
2409 * @dir: new clock direction - input/output.
2410 *
2411 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2412 */
2413int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2414 int source, unsigned int freq, int dir)
2415{
2416 if (codec->driver->set_sysclk)
2417 return codec->driver->set_sysclk(codec, clk_id, source,
2418 freq, dir);
2419 else
2420 return -ENOTSUPP;
2421}
2422EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2423
2424/**
2425 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2426 * @dai: DAI
2427 * @div_id: DAI specific clock divider ID
2428 * @div: new clock divisor.
2429 *
2430 * Configures the clock dividers. This is used to derive the best DAI bit and
2431 * frame clocks from the system or master clock. It's best to set the DAI bit
2432 * and frame clocks as low as possible to save system power.
2433 */
2434int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2435 int div_id, int div)
2436{
2437 if (dai->driver && dai->driver->ops->set_clkdiv)
2438 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2439 else
2440 return -EINVAL;
2441}
2442EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2443
2444/**
2445 * snd_soc_dai_set_pll - configure DAI PLL.
2446 * @dai: DAI
2447 * @pll_id: DAI specific PLL ID
2448 * @source: DAI specific source for the PLL
2449 * @freq_in: PLL input clock frequency in Hz
2450 * @freq_out: requested PLL output clock frequency in Hz
2451 *
2452 * Configures and enables PLL to generate output clock based on input clock.
2453 */
2454int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2455 unsigned int freq_in, unsigned int freq_out)
2456{
2457 if (dai->driver && dai->driver->ops->set_pll)
2458 return dai->driver->ops->set_pll(dai, pll_id, source,
2459 freq_in, freq_out);
2460 else if (dai->codec && dai->codec->driver->set_pll)
2461 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2462 freq_in, freq_out);
2463 else
2464 return -EINVAL;
2465}
2466EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2467
2468/*
2469 * snd_soc_codec_set_pll - configure codec PLL.
2470 * @codec: CODEC
2471 * @pll_id: DAI specific PLL ID
2472 * @source: DAI specific source for the PLL
2473 * @freq_in: PLL input clock frequency in Hz
2474 * @freq_out: requested PLL output clock frequency in Hz
2475 *
2476 * Configures and enables PLL to generate output clock based on input clock.
2477 */
2478int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2479 unsigned int freq_in, unsigned int freq_out)
2480{
2481 if (codec->driver->set_pll)
2482 return codec->driver->set_pll(codec, pll_id, source,
2483 freq_in, freq_out);
2484 else
2485 return -EINVAL;
2486}
2487EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2488
2489/**
2490 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2491 * @dai: DAI
2492 * @ratio: Ratio of BCLK to Sample rate.
2493 *
2494 * Configures the DAI for a preset BCLK to sample rate ratio.
2495 */
2496int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2497{
2498 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2499 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2500 else
2501 return -EINVAL;
2502}
2503EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2504
2505/**
2506 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2507 * @dai: DAI
2508 * @fmt: SND_SOC_DAIFMT_ format value.
2509 *
2510 * Configures the DAI hardware format and clocking.
2511 */
2512int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2513{
2514 if (dai->driver == NULL)
2515 return -EINVAL;
2516 if (dai->driver->ops->set_fmt == NULL)
2517 return -ENOTSUPP;
2518 return dai->driver->ops->set_fmt(dai, fmt);
2519}
2520EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2521
2522/**
2523 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2524 * @slots: Number of slots in use.
2525 * @tx_mask: bitmask representing active TX slots.
2526 * @rx_mask: bitmask representing active RX slots.
2527 *
2528 * Generates the TDM tx and rx slot default masks for DAI.
2529 */
2530static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2531 unsigned int *tx_mask,
2532 unsigned int *rx_mask)
2533{
2534 if (*tx_mask || *rx_mask)
2535 return 0;
2536
2537 if (!slots)
2538 return -EINVAL;
2539
2540 *tx_mask = (1 << slots) - 1;
2541 *rx_mask = (1 << slots) - 1;
2542
2543 return 0;
2544}
2545
2546/**
2547 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2548 * @dai: The DAI to configure
2549 * @tx_mask: bitmask representing active TX slots.
2550 * @rx_mask: bitmask representing active RX slots.
2551 * @slots: Number of slots in use.
2552 * @slot_width: Width in bits for each slot.
2553 *
2554 * This function configures the specified DAI for TDM operation. @slot contains
2555 * the total number of slots of the TDM stream and @slot_with the width of each
2556 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2557 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2558 * DAI should write to or read from. If a bit is set the corresponding slot is
2559 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2560 * the first slot, bit 1 to the second slot and so on. The first active slot
2561 * maps to the first channel of the DAI, the second active slot to the second
2562 * channel and so on.
2563 *
2564 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2565 * @rx_mask and @slot_width will be ignored.
2566 *
2567 * Returns 0 on success, a negative error code otherwise.
2568 */
2569int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2570 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2571{
2572 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2573 dai->driver->ops->xlate_tdm_slot_mask(slots,
2574 &tx_mask, &rx_mask);
2575 else
2576 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2577
2578 dai->tx_mask = tx_mask;
2579 dai->rx_mask = rx_mask;
2580
2581 if (dai->driver && dai->driver->ops->set_tdm_slot)
2582 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2583 slots, slot_width);
2584 else
2585 return -ENOTSUPP;
2586}
2587EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2588
2589/**
2590 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2591 * @dai: DAI
2592 * @tx_num: how many TX channels
2593 * @tx_slot: pointer to an array which imply the TX slot number channel
2594 * 0~num-1 uses
2595 * @rx_num: how many RX channels
2596 * @rx_slot: pointer to an array which imply the RX slot number channel
2597 * 0~num-1 uses
2598 *
2599 * configure the relationship between channel number and TDM slot number.
2600 */
2601int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2602 unsigned int tx_num, unsigned int *tx_slot,
2603 unsigned int rx_num, unsigned int *rx_slot)
2604{
2605 if (dai->driver && dai->driver->ops->set_channel_map)
2606 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2607 rx_num, rx_slot);
2608 else
2609 return -EINVAL;
2610}
2611EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2612
2613/**
2614 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2615 * @dai: DAI
2616 * @tristate: tristate enable
2617 *
2618 * Tristates the DAI so that others can use it.
2619 */
2620int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2621{
2622 if (dai->driver && dai->driver->ops->set_tristate)
2623 return dai->driver->ops->set_tristate(dai, tristate);
2624 else
2625 return -EINVAL;
2626}
2627EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2628
2629/**
2630 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2631 * @dai: DAI
2632 * @mute: mute enable
2633 * @direction: stream to mute
2634 *
2635 * Mutes the DAI DAC.
2636 */
2637int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2638 int direction)
2639{
2640 if (!dai->driver)
2641 return -ENOTSUPP;
2642
2643 if (dai->driver->ops->mute_stream)
2644 return dai->driver->ops->mute_stream(dai, mute, direction);
2645 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2646 dai->driver->ops->digital_mute)
2647 return dai->driver->ops->digital_mute(dai, mute);
2648 else
2649 return -ENOTSUPP;
2650}
2651EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2652
2653/**
2654 * snd_soc_register_card - Register a card with the ASoC core
2655 *
2656 * @card: Card to register
2657 *
2658 */
2659int snd_soc_register_card(struct snd_soc_card *card)
2660{
2661 int i, ret;
2662 struct snd_soc_pcm_runtime *rtd;
2663
2664 if (!card->name || !card->dev)
2665 return -EINVAL;
2666
2667 for (i = 0; i < card->num_links; i++) {
2668 struct snd_soc_dai_link *link = &card->dai_link[i];
2669
2670 ret = soc_init_dai_link(card, link);
2671 if (ret) {
2672 dev_err(card->dev, "ASoC: failed to init link %s\n",
2673 link->name);
2674 return ret;
2675 }
2676 }
2677
2678 dev_set_drvdata(card->dev, card);
2679
2680 snd_soc_initialize_card_lists(card);
2681
2682 INIT_LIST_HEAD(&card->dai_link_list);
2683 card->num_dai_links = 0;
2684
2685 INIT_LIST_HEAD(&card->rtd_list);
2686 card->num_rtd = 0;
2687
2688 INIT_LIST_HEAD(&card->dapm_dirty);
2689 INIT_LIST_HEAD(&card->dobj_list);
2690 card->instantiated = 0;
2691 mutex_init(&card->mutex);
2692 mutex_init(&card->dapm_mutex);
2693
2694 ret = snd_soc_instantiate_card(card);
2695 if (ret != 0)
2696 return ret;
2697
2698 /* deactivate pins to sleep state */
2699 list_for_each_entry(rtd, &card->rtd_list, list) {
2700 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2701 int j;
2702
2703 for (j = 0; j < rtd->num_codecs; j++) {
2704 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2705 if (!codec_dai->active)
2706 pinctrl_pm_select_sleep_state(codec_dai->dev);
2707 }
2708
2709 if (!cpu_dai->active)
2710 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2711 }
2712
2713 return ret;
2714}
2715EXPORT_SYMBOL_GPL(snd_soc_register_card);
2716
2717/**
2718 * snd_soc_unregister_card - Unregister a card with the ASoC core
2719 *
2720 * @card: Card to unregister
2721 *
2722 */
2723int snd_soc_unregister_card(struct snd_soc_card *card)
2724{
2725 if (card->instantiated) {
2726 card->instantiated = false;
2727 snd_soc_dapm_shutdown(card);
2728 soc_cleanup_card_resources(card);
2729 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2730 }
2731
2732 return 0;
2733}
2734EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2735
2736/*
2737 * Simplify DAI link configuration by removing ".-1" from device names
2738 * and sanitizing names.
2739 */
2740static char *fmt_single_name(struct device *dev, int *id)
2741{
2742 char *found, name[NAME_SIZE];
2743 int id1, id2;
2744
2745 if (dev_name(dev) == NULL)
2746 return NULL;
2747
2748 strlcpy(name, dev_name(dev), NAME_SIZE);
2749
2750 /* are we a "%s.%d" name (platform and SPI components) */
2751 found = strstr(name, dev->driver->name);
2752 if (found) {
2753 /* get ID */
2754 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2755
2756 /* discard ID from name if ID == -1 */
2757 if (*id == -1)
2758 found[strlen(dev->driver->name)] = '\0';
2759 }
2760
2761 } else {
2762 /* I2C component devices are named "bus-addr" */
2763 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2764 char tmp[NAME_SIZE];
2765
2766 /* create unique ID number from I2C addr and bus */
2767 *id = ((id1 & 0xffff) << 16) + id2;
2768
2769 /* sanitize component name for DAI link creation */
2770 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2771 strlcpy(name, tmp, NAME_SIZE);
2772 } else
2773 *id = 0;
2774 }
2775
2776 return kstrdup(name, GFP_KERNEL);
2777}
2778
2779/*
2780 * Simplify DAI link naming for single devices with multiple DAIs by removing
2781 * any ".-1" and using the DAI name (instead of device name).
2782 */
2783static inline char *fmt_multiple_name(struct device *dev,
2784 struct snd_soc_dai_driver *dai_drv)
2785{
2786 if (dai_drv->name == NULL) {
2787 dev_err(dev,
2788 "ASoC: error - multiple DAI %s registered with no name\n",
2789 dev_name(dev));
2790 return NULL;
2791 }
2792
2793 return kstrdup(dai_drv->name, GFP_KERNEL);
2794}
2795
2796/**
2797 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2798 *
2799 * @component: The component for which the DAIs should be unregistered
2800 */
2801static void snd_soc_unregister_dais(struct snd_soc_component *component)
2802{
2803 struct snd_soc_dai *dai, *_dai;
2804
2805 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2806 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2807 dai->name);
2808 list_del(&dai->list);
2809 kfree(dai->name);
2810 kfree(dai);
2811 }
2812}
2813
2814/* Create a DAI and add it to the component's DAI list */
2815static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2816 struct snd_soc_dai_driver *dai_drv,
2817 bool legacy_dai_naming)
2818{
2819 struct device *dev = component->dev;
2820 struct snd_soc_dai *dai;
2821
2822 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2823
2824 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2825 if (dai == NULL)
2826 return NULL;
2827
2828 /*
2829 * Back in the old days when we still had component-less DAIs,
2830 * instead of having a static name, component-less DAIs would
2831 * inherit the name of the parent device so it is possible to
2832 * register multiple instances of the DAI. We still need to keep
2833 * the same naming style even though those DAIs are not
2834 * component-less anymore.
2835 */
2836 if (legacy_dai_naming &&
2837 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2838 dai->name = fmt_single_name(dev, &dai->id);
2839 } else {
2840 dai->name = fmt_multiple_name(dev, dai_drv);
2841 if (dai_drv->id)
2842 dai->id = dai_drv->id;
2843 else
2844 dai->id = component->num_dai;
2845 }
2846 if (dai->name == NULL) {
2847 kfree(dai);
2848 return NULL;
2849 }
2850
2851 dai->component = component;
2852 dai->dev = dev;
2853 dai->driver = dai_drv;
2854 if (!dai->driver->ops)
2855 dai->driver->ops = &null_dai_ops;
2856
2857 list_add(&dai->list, &component->dai_list);
2858 component->num_dai++;
2859
2860 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2861 return dai;
2862}
2863
2864/**
2865 * snd_soc_register_dais - Register a DAI with the ASoC core
2866 *
2867 * @component: The component the DAIs are registered for
2868 * @dai_drv: DAI driver to use for the DAIs
2869 * @count: Number of DAIs
2870 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2871 * parent's name.
2872 */
2873static int snd_soc_register_dais(struct snd_soc_component *component,
2874 struct snd_soc_dai_driver *dai_drv, size_t count,
2875 bool legacy_dai_naming)
2876{
2877 struct device *dev = component->dev;
2878 struct snd_soc_dai *dai;
2879 unsigned int i;
2880 int ret;
2881
2882 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2883
2884 component->dai_drv = dai_drv;
2885
2886 for (i = 0; i < count; i++) {
2887
2888 dai = soc_add_dai(component, dai_drv + i,
2889 count == 1 && legacy_dai_naming);
2890 if (dai == NULL) {
2891 ret = -ENOMEM;
2892 goto err;
2893 }
2894 }
2895
2896 return 0;
2897
2898err:
2899 snd_soc_unregister_dais(component);
2900
2901 return ret;
2902}
2903
2904/**
2905 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2906 *
2907 * @component: The component the DAIs are registered for
2908 * @dai_drv: DAI driver to use for the DAI
2909 *
2910 * Topology can use this API to register DAIs when probing a component.
2911 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2912 * will be freed in the component cleanup.
2913 */
2914int snd_soc_register_dai(struct snd_soc_component *component,
2915 struct snd_soc_dai_driver *dai_drv)
2916{
2917 struct snd_soc_dapm_context *dapm =
2918 snd_soc_component_get_dapm(component);
2919 struct snd_soc_dai *dai;
2920 int ret;
2921
2922 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2923 dev_err(component->dev, "Invalid dai type %d\n",
2924 dai_drv->dobj.type);
2925 return -EINVAL;
2926 }
2927
2928 lockdep_assert_held(&client_mutex);
2929 dai = soc_add_dai(component, dai_drv, false);
2930 if (!dai)
2931 return -ENOMEM;
2932
2933 /* Create the DAI widgets here. After adding DAIs, topology may
2934 * also add routes that need these widgets as source or sink.
2935 */
2936 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2937 if (ret != 0) {
2938 dev_err(component->dev,
2939 "Failed to create DAI widgets %d\n", ret);
2940 }
2941
2942 return ret;
2943}
2944EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2945
2946static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2947 enum snd_soc_dapm_type type, int subseq)
2948{
2949 struct snd_soc_component *component = dapm->component;
2950
2951 component->driver->seq_notifier(component, type, subseq);
2952}
2953
2954static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2955 int event)
2956{
2957 struct snd_soc_component *component = dapm->component;
2958
2959 return component->driver->stream_event(component, event);
2960}
2961
2962static int snd_soc_component_initialize(struct snd_soc_component *component,
2963 const struct snd_soc_component_driver *driver, struct device *dev)
2964{
2965 struct snd_soc_dapm_context *dapm;
2966
2967 component->name = fmt_single_name(dev, &component->id);
2968 if (!component->name) {
2969 dev_err(dev, "ASoC: Failed to allocate name\n");
2970 return -ENOMEM;
2971 }
2972
2973 component->dev = dev;
2974 component->driver = driver;
2975 component->probe = component->driver->probe;
2976 component->remove = component->driver->remove;
2977 component->suspend = component->driver->suspend;
2978 component->resume = component->driver->resume;
2979
2980 dapm = &component->dapm;
2981 dapm->dev = dev;
2982 dapm->component = component;
2983 dapm->bias_level = SND_SOC_BIAS_OFF;
2984 dapm->idle_bias_off = true;
2985 if (driver->seq_notifier)
2986 dapm->seq_notifier = snd_soc_component_seq_notifier;
2987 if (driver->stream_event)
2988 dapm->stream_event = snd_soc_component_stream_event;
2989
2990 component->controls = driver->controls;
2991 component->num_controls = driver->num_controls;
2992 component->dapm_widgets = driver->dapm_widgets;
2993 component->num_dapm_widgets = driver->num_dapm_widgets;
2994 component->dapm_routes = driver->dapm_routes;
2995 component->num_dapm_routes = driver->num_dapm_routes;
2996
2997 INIT_LIST_HEAD(&component->dai_list);
2998 mutex_init(&component->io_mutex);
2999
3000 return 0;
3001}
3002
3003static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3004{
3005 int val_bytes = regmap_get_val_bytes(component->regmap);
3006
3007 /* Errors are legitimate for non-integer byte multiples */
3008 if (val_bytes > 0)
3009 component->val_bytes = val_bytes;
3010}
3011
3012#ifdef CONFIG_REGMAP
3013
3014/**
3015 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3016 * @component: The component for which to initialize the regmap instance
3017 * @regmap: The regmap instance that should be used by the component
3018 *
3019 * This function allows deferred assignment of the regmap instance that is
3020 * associated with the component. Only use this if the regmap instance is not
3021 * yet ready when the component is registered. The function must also be called
3022 * before the first IO attempt of the component.
3023 */
3024void snd_soc_component_init_regmap(struct snd_soc_component *component,
3025 struct regmap *regmap)
3026{
3027 component->regmap = regmap;
3028 snd_soc_component_setup_regmap(component);
3029}
3030EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3031
3032/**
3033 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3034 * @component: The component for which to de-initialize the regmap instance
3035 *
3036 * Calls regmap_exit() on the regmap instance associated to the component and
3037 * removes the regmap instance from the component.
3038 *
3039 * This function should only be used if snd_soc_component_init_regmap() was used
3040 * to initialize the regmap instance.
3041 */
3042void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3043{
3044 regmap_exit(component->regmap);
3045 component->regmap = NULL;
3046}
3047EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3048
3049#endif
3050
3051static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3052{
3053 if (!component->write && !component->read) {
3054 if (!component->regmap)
3055 component->regmap = dev_get_regmap(component->dev, NULL);
3056 if (component->regmap)
3057 snd_soc_component_setup_regmap(component);
3058 }
3059
3060 list_add(&component->list, &component_list);
3061 INIT_LIST_HEAD(&component->dobj_list);
3062}
3063
3064static void snd_soc_component_add(struct snd_soc_component *component)
3065{
3066 mutex_lock(&client_mutex);
3067 snd_soc_component_add_unlocked(component);
3068 mutex_unlock(&client_mutex);
3069}
3070
3071static void snd_soc_component_cleanup(struct snd_soc_component *component)
3072{
3073 snd_soc_unregister_dais(component);
3074 kfree(component->name);
3075}
3076
3077static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3078{
3079 list_del(&component->list);
3080}
3081
3082int snd_soc_register_component(struct device *dev,
3083 const struct snd_soc_component_driver *cmpnt_drv,
3084 struct snd_soc_dai_driver *dai_drv,
3085 int num_dai)
3086{
3087 struct snd_soc_component *cmpnt;
3088 int ret;
3089
3090 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
3091 if (!cmpnt) {
3092 dev_err(dev, "ASoC: Failed to allocate memory\n");
3093 return -ENOMEM;
3094 }
3095
3096 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
3097 if (ret)
3098 goto err_free;
3099
3100 cmpnt->ignore_pmdown_time = true;
3101 cmpnt->registered_as_component = true;
3102
3103 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
3104 if (ret < 0) {
3105 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3106 goto err_cleanup;
3107 }
3108
3109 snd_soc_component_add(cmpnt);
3110
3111 return 0;
3112
3113err_cleanup:
3114 snd_soc_component_cleanup(cmpnt);
3115err_free:
3116 kfree(cmpnt);
3117 return ret;
3118}
3119EXPORT_SYMBOL_GPL(snd_soc_register_component);
3120
3121/**
3122 * snd_soc_unregister_component - Unregister a component from the ASoC core
3123 *
3124 * @dev: The device to unregister
3125 */
3126void snd_soc_unregister_component(struct device *dev)
3127{
3128 struct snd_soc_component *cmpnt;
3129
3130 mutex_lock(&client_mutex);
3131 list_for_each_entry(cmpnt, &component_list, list) {
3132 if (dev == cmpnt->dev && cmpnt->registered_as_component)
3133 goto found;
3134 }
3135 mutex_unlock(&client_mutex);
3136 return;
3137
3138found:
3139 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
3140 snd_soc_component_del_unlocked(cmpnt);
3141 mutex_unlock(&client_mutex);
3142 snd_soc_component_cleanup(cmpnt);
3143 kfree(cmpnt);
3144}
3145EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3146
3147static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3148{
3149 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3150
3151 return platform->driver->probe(platform);
3152}
3153
3154static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3155{
3156 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3157
3158 platform->driver->remove(platform);
3159}
3160
3161/**
3162 * snd_soc_add_platform - Add a platform to the ASoC core
3163 * @dev: The parent device for the platform
3164 * @platform: The platform to add
3165 * @platform_drv: The driver for the platform
3166 */
3167int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3168 const struct snd_soc_platform_driver *platform_drv)
3169{
3170 int ret;
3171
3172 ret = snd_soc_component_initialize(&platform->component,
3173 &platform_drv->component_driver, dev);
3174 if (ret)
3175 return ret;
3176
3177 platform->dev = dev;
3178 platform->driver = platform_drv;
3179
3180 if (platform_drv->probe)
3181 platform->component.probe = snd_soc_platform_drv_probe;
3182 if (platform_drv->remove)
3183 platform->component.remove = snd_soc_platform_drv_remove;
3184
3185#ifdef CONFIG_DEBUG_FS
3186 platform->component.debugfs_prefix = "platform";
3187#endif
3188
3189 mutex_lock(&client_mutex);
3190 snd_soc_component_add_unlocked(&platform->component);
3191 list_add(&platform->list, &platform_list);
3192 mutex_unlock(&client_mutex);
3193
3194 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3195 platform->component.name);
3196
3197 return 0;
3198}
3199EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3200
3201/**
3202 * snd_soc_register_platform - Register a platform with the ASoC core
3203 *
3204 * @dev: The device for the platform
3205 * @platform_drv: The driver for the platform
3206 */
3207int snd_soc_register_platform(struct device *dev,
3208 const struct snd_soc_platform_driver *platform_drv)
3209{
3210 struct snd_soc_platform *platform;
3211 int ret;
3212
3213 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3214
3215 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3216 if (platform == NULL)
3217 return -ENOMEM;
3218
3219 ret = snd_soc_add_platform(dev, platform, platform_drv);
3220 if (ret)
3221 kfree(platform);
3222
3223 return ret;
3224}
3225EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3226
3227/**
3228 * snd_soc_remove_platform - Remove a platform from the ASoC core
3229 * @platform: the platform to remove
3230 */
3231void snd_soc_remove_platform(struct snd_soc_platform *platform)
3232{
3233
3234 mutex_lock(&client_mutex);
3235 list_del(&platform->list);
3236 snd_soc_component_del_unlocked(&platform->component);
3237 mutex_unlock(&client_mutex);
3238
3239 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3240 platform->component.name);
3241
3242 snd_soc_component_cleanup(&platform->component);
3243}
3244EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3245
3246struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3247{
3248 struct snd_soc_platform *platform;
3249
3250 mutex_lock(&client_mutex);
3251 list_for_each_entry(platform, &platform_list, list) {
3252 if (dev == platform->dev) {
3253 mutex_unlock(&client_mutex);
3254 return platform;
3255 }
3256 }
3257 mutex_unlock(&client_mutex);
3258
3259 return NULL;
3260}
3261EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3262
3263/**
3264 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3265 *
3266 * @dev: platform to unregister
3267 */
3268void snd_soc_unregister_platform(struct device *dev)
3269{
3270 struct snd_soc_platform *platform;
3271
3272 platform = snd_soc_lookup_platform(dev);
3273 if (!platform)
3274 return;
3275
3276 snd_soc_remove_platform(platform);
3277 kfree(platform);
3278}
3279EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3280
3281static u64 codec_format_map[] = {
3282 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3283 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3284 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3285 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3286 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3287 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3288 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3289 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3290 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3291 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3292 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3293 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3294 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3295 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3296 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3297 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3298};
3299
3300/* Fix up the DAI formats for endianness: codecs don't actually see
3301 * the endianness of the data but we're using the CPU format
3302 * definitions which do need to include endianness so we ensure that
3303 * codec DAIs always have both big and little endian variants set.
3304 */
3305static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3306{
3307 int i;
3308
3309 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3310 if (stream->formats & codec_format_map[i])
3311 stream->formats |= codec_format_map[i];
3312}
3313
3314static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3315{
3316 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3317
3318 return codec->driver->probe(codec);
3319}
3320
3321static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3322{
3323 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3324
3325 codec->driver->remove(codec);
3326}
3327
3328static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3329{
3330 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3331
3332 return codec->driver->suspend(codec);
3333}
3334
3335static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3336{
3337 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3338
3339 return codec->driver->resume(codec);
3340}
3341
3342static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3343 unsigned int reg, unsigned int val)
3344{
3345 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3346
3347 return codec->driver->write(codec, reg, val);
3348}
3349
3350static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3351 unsigned int reg, unsigned int *val)
3352{
3353 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3354
3355 *val = codec->driver->read(codec, reg);
3356
3357 return 0;
3358}
3359
3360static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3361 enum snd_soc_bias_level level)
3362{
3363 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3364
3365 return codec->driver->set_bias_level(codec, level);
3366}
3367
3368/**
3369 * snd_soc_register_codec - Register a codec with the ASoC core
3370 *
3371 * @dev: The parent device for this codec
3372 * @codec_drv: Codec driver
3373 * @dai_drv: The associated DAI driver
3374 * @num_dai: Number of DAIs
3375 */
3376int snd_soc_register_codec(struct device *dev,
3377 const struct snd_soc_codec_driver *codec_drv,
3378 struct snd_soc_dai_driver *dai_drv,
3379 int num_dai)
3380{
3381 struct snd_soc_dapm_context *dapm;
3382 struct snd_soc_codec *codec;
3383 struct snd_soc_dai *dai;
3384 int ret, i;
3385
3386 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3387
3388 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3389 if (codec == NULL)
3390 return -ENOMEM;
3391
3392 codec->component.codec = codec;
3393
3394 ret = snd_soc_component_initialize(&codec->component,
3395 &codec_drv->component_driver, dev);
3396 if (ret)
3397 goto err_free;
3398
3399 if (codec_drv->probe)
3400 codec->component.probe = snd_soc_codec_drv_probe;
3401 if (codec_drv->remove)
3402 codec->component.remove = snd_soc_codec_drv_remove;
3403 if (codec_drv->suspend)
3404 codec->component.suspend = snd_soc_codec_drv_suspend;
3405 if (codec_drv->resume)
3406 codec->component.resume = snd_soc_codec_drv_resume;
3407 if (codec_drv->write)
3408 codec->component.write = snd_soc_codec_drv_write;
3409 if (codec_drv->read)
3410 codec->component.read = snd_soc_codec_drv_read;
3411 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3412
3413 dapm = snd_soc_codec_get_dapm(codec);
3414 dapm->idle_bias_off = codec_drv->idle_bias_off;
3415 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3416 if (codec_drv->seq_notifier)
3417 dapm->seq_notifier = codec_drv->seq_notifier;
3418 if (codec_drv->set_bias_level)
3419 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3420 codec->dev = dev;
3421 codec->driver = codec_drv;
3422 codec->component.val_bytes = codec_drv->reg_word_size;
3423
3424#ifdef CONFIG_DEBUG_FS
3425 codec->component.init_debugfs = soc_init_codec_debugfs;
3426 codec->component.debugfs_prefix = "codec";
3427#endif
3428
3429 if (codec_drv->get_regmap)
3430 codec->component.regmap = codec_drv->get_regmap(dev);
3431
3432 for (i = 0; i < num_dai; i++) {
3433 fixup_codec_formats(&dai_drv[i].playback);
3434 fixup_codec_formats(&dai_drv[i].capture);
3435 }
3436
3437 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3438 if (ret < 0) {
3439 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3440 goto err_cleanup;
3441 }
3442
3443 list_for_each_entry(dai, &codec->component.dai_list, list)
3444 dai->codec = codec;
3445
3446 mutex_lock(&client_mutex);
3447 snd_soc_component_add_unlocked(&codec->component);
3448 list_add(&codec->list, &codec_list);
3449 mutex_unlock(&client_mutex);
3450
3451 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3452 codec->component.name);
3453 return 0;
3454
3455err_cleanup:
3456 snd_soc_component_cleanup(&codec->component);
3457err_free:
3458 kfree(codec);
3459 return ret;
3460}
3461EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3462
3463/**
3464 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3465 *
3466 * @dev: codec to unregister
3467 */
3468void snd_soc_unregister_codec(struct device *dev)
3469{
3470 struct snd_soc_codec *codec;
3471
3472 mutex_lock(&client_mutex);
3473 list_for_each_entry(codec, &codec_list, list) {
3474 if (dev == codec->dev)
3475 goto found;
3476 }
3477 mutex_unlock(&client_mutex);
3478 return;
3479
3480found:
3481 list_del(&codec->list);
3482 snd_soc_component_del_unlocked(&codec->component);
3483 mutex_unlock(&client_mutex);
3484
3485 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3486 codec->component.name);
3487
3488 snd_soc_component_cleanup(&codec->component);
3489 snd_soc_cache_exit(codec);
3490 kfree(codec);
3491}
3492EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3493
3494/* Retrieve a card's name from device tree */
3495int snd_soc_of_parse_card_name_from_node(struct snd_soc_card *card,
3496 struct device_node *np,
3497 const char *propname)
3498{
3499 int ret;
3500
3501 if (!card->dev) {
3502 pr_err("card->dev is not set before calling %s\n", __func__);
3503 return -EINVAL;
3504 }
3505
3506 if (!np)
3507 np = card->dev->of_node;
3508
3509 ret = of_property_read_string_index(np, propname, 0, &card->name);
3510 /*
3511 * EINVAL means the property does not exist. This is fine providing
3512 * card->name was previously set, which is checked later in
3513 * snd_soc_register_card.
3514 */
3515 if (ret < 0 && ret != -EINVAL) {
3516 dev_err(card->dev,
3517 "ASoC: Property '%s' could not be read: %d\n",
3518 propname, ret);
3519 return ret;
3520 }
3521
3522 return 0;
3523}
3524EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name_from_node);
3525
3526static const struct snd_soc_dapm_widget simple_widgets[] = {
3527 SND_SOC_DAPM_MIC("Microphone", NULL),
3528 SND_SOC_DAPM_LINE("Line", NULL),
3529 SND_SOC_DAPM_HP("Headphone", NULL),
3530 SND_SOC_DAPM_SPK("Speaker", NULL),
3531};
3532
3533int snd_soc_of_parse_audio_simple_widgets_from_node(struct snd_soc_card *card,
3534 struct device_node *np,
3535 const char *propname)
3536{
3537 struct snd_soc_dapm_widget *widgets;
3538 const char *template, *wname;
3539 int i, j, num_widgets, ret;
3540
3541 if (!np)
3542 np = card->dev->of_node;
3543
3544 num_widgets = of_property_count_strings(np, propname);
3545 if (num_widgets < 0) {
3546 dev_err(card->dev,
3547 "ASoC: Property '%s' does not exist\n", propname);
3548 return -EINVAL;
3549 }
3550 if (num_widgets & 1) {
3551 dev_err(card->dev,
3552 "ASoC: Property '%s' length is not even\n", propname);
3553 return -EINVAL;
3554 }
3555
3556 num_widgets /= 2;
3557 if (!num_widgets) {
3558 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3559 propname);
3560 return -EINVAL;
3561 }
3562
3563 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3564 GFP_KERNEL);
3565 if (!widgets) {
3566 dev_err(card->dev,
3567 "ASoC: Could not allocate memory for widgets\n");
3568 return -ENOMEM;
3569 }
3570
3571 for (i = 0; i < num_widgets; i++) {
3572 ret = of_property_read_string_index(np, propname,
3573 2 * i, &template);
3574 if (ret) {
3575 dev_err(card->dev,
3576 "ASoC: Property '%s' index %d read error:%d\n",
3577 propname, 2 * i, ret);
3578 return -EINVAL;
3579 }
3580
3581 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3582 if (!strncmp(template, simple_widgets[j].name,
3583 strlen(simple_widgets[j].name))) {
3584 widgets[i] = simple_widgets[j];
3585 break;
3586 }
3587 }
3588
3589 if (j >= ARRAY_SIZE(simple_widgets)) {
3590 dev_err(card->dev,
3591 "ASoC: DAPM widget '%s' is not supported\n",
3592 template);
3593 return -EINVAL;
3594 }
3595
3596 ret = of_property_read_string_index(np, propname,
3597 (2 * i) + 1,
3598 &wname);
3599 if (ret) {
3600 dev_err(card->dev,
3601 "ASoC: Property '%s' index %d read error:%d\n",
3602 propname, (2 * i) + 1, ret);
3603 return -EINVAL;
3604 }
3605
3606 widgets[i].name = wname;
3607 }
3608
3609 card->of_dapm_widgets = widgets;
3610 card->num_of_dapm_widgets = num_widgets;
3611
3612 return 0;
3613}
3614EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets_from_node);
3615
3616static int snd_soc_of_get_slot_mask(struct device_node *np,
3617 const char *prop_name,
3618 unsigned int *mask)
3619{
3620 u32 val;
3621 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3622 int i;
3623
3624 if (!of_slot_mask)
3625 return 0;
3626 val /= sizeof(u32);
3627 for (i = 0; i < val; i++)
3628 if (be32_to_cpup(&of_slot_mask[i]))
3629 *mask |= (1 << i);
3630
3631 return val;
3632}
3633
3634int snd_soc_of_parse_tdm_slot(struct device_node *np,
3635 unsigned int *tx_mask,
3636 unsigned int *rx_mask,
3637 unsigned int *slots,
3638 unsigned int *slot_width)
3639{
3640 u32 val;
3641 int ret;
3642
3643 if (tx_mask)
3644 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3645 if (rx_mask)
3646 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3647
3648 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3649 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3650 if (ret)
3651 return ret;
3652
3653 if (slots)
3654 *slots = val;
3655 }
3656
3657 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3658 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3659 if (ret)
3660 return ret;
3661
3662 if (slot_width)
3663 *slot_width = val;
3664 }
3665
3666 return 0;
3667}
3668EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3669
3670void snd_soc_of_parse_audio_prefix_from_node(struct snd_soc_card *card,
3671 struct device_node *np,
3672 struct snd_soc_codec_conf *codec_conf,
3673 struct device_node *of_node,
3674 const char *propname)
3675{
3676 const char *str;
3677 int ret;
3678
3679 if (!np)
3680 np = card->dev->of_node;
3681
3682 ret = of_property_read_string(np, propname, &str);
3683 if (ret < 0) {
3684 /* no prefix is not error */
3685 return;
3686 }
3687
3688 codec_conf->of_node = of_node;
3689 codec_conf->name_prefix = str;
3690}
3691EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix_from_node);
3692
3693int snd_soc_of_parse_audio_routing_from_node(struct snd_soc_card *card,
3694 struct device_node *np,
3695 const char *propname)
3696{
3697 int num_routes;
3698 struct snd_soc_dapm_route *routes;
3699 int i, ret;
3700
3701 if (!np)
3702 np = card->dev->of_node;
3703
3704 num_routes = of_property_count_strings(np, propname);
3705 if (num_routes < 0 || num_routes & 1) {
3706 dev_err(card->dev,
3707 "ASoC: Property '%s' does not exist or its length is not even\n",
3708 propname);
3709 return -EINVAL;
3710 }
3711 num_routes /= 2;
3712 if (!num_routes) {
3713 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3714 propname);
3715 return -EINVAL;
3716 }
3717
3718 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3719 GFP_KERNEL);
3720 if (!routes) {
3721 dev_err(card->dev,
3722 "ASoC: Could not allocate DAPM route table\n");
3723 return -EINVAL;
3724 }
3725
3726 for (i = 0; i < num_routes; i++) {
3727 ret = of_property_read_string_index(np, propname,
3728 2 * i, &routes[i].sink);
3729 if (ret) {
3730 dev_err(card->dev,
3731 "ASoC: Property '%s' index %d could not be read: %d\n",
3732 propname, 2 * i, ret);
3733 return -EINVAL;
3734 }
3735 ret = of_property_read_string_index(np, propname,
3736 (2 * i) + 1, &routes[i].source);
3737 if (ret) {
3738 dev_err(card->dev,
3739 "ASoC: Property '%s' index %d could not be read: %d\n",
3740 propname, (2 * i) + 1, ret);
3741 return -EINVAL;
3742 }
3743 }
3744
3745 card->num_of_dapm_routes = num_routes;
3746 card->of_dapm_routes = routes;
3747
3748 return 0;
3749}
3750EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing_from_node);
3751
3752unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3753 const char *prefix,
3754 struct device_node **bitclkmaster,
3755 struct device_node **framemaster)
3756{
3757 int ret, i;
3758 char prop[128];
3759 unsigned int format = 0;
3760 int bit, frame;
3761 const char *str;
3762 struct {
3763 char *name;
3764 unsigned int val;
3765 } of_fmt_table[] = {
3766 { "i2s", SND_SOC_DAIFMT_I2S },
3767 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3768 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3769 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3770 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3771 { "ac97", SND_SOC_DAIFMT_AC97 },
3772 { "pdm", SND_SOC_DAIFMT_PDM},
3773 { "msb", SND_SOC_DAIFMT_MSB },
3774 { "lsb", SND_SOC_DAIFMT_LSB },
3775 };
3776
3777 if (!prefix)
3778 prefix = "";
3779
3780 /*
3781 * check "[prefix]format = xxx"
3782 * SND_SOC_DAIFMT_FORMAT_MASK area
3783 */
3784 snprintf(prop, sizeof(prop), "%sformat", prefix);
3785 ret = of_property_read_string(np, prop, &str);
3786 if (ret == 0) {
3787 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3788 if (strcmp(str, of_fmt_table[i].name) == 0) {
3789 format |= of_fmt_table[i].val;
3790 break;
3791 }
3792 }
3793 }
3794
3795 /*
3796 * check "[prefix]continuous-clock"
3797 * SND_SOC_DAIFMT_CLOCK_MASK area
3798 */
3799 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3800 if (of_property_read_bool(np, prop))
3801 format |= SND_SOC_DAIFMT_CONT;
3802 else
3803 format |= SND_SOC_DAIFMT_GATED;
3804
3805 /*
3806 * check "[prefix]bitclock-inversion"
3807 * check "[prefix]frame-inversion"
3808 * SND_SOC_DAIFMT_INV_MASK area
3809 */
3810 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3811 bit = !!of_get_property(np, prop, NULL);
3812
3813 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3814 frame = !!of_get_property(np, prop, NULL);
3815
3816 switch ((bit << 4) + frame) {
3817 case 0x11:
3818 format |= SND_SOC_DAIFMT_IB_IF;
3819 break;
3820 case 0x10:
3821 format |= SND_SOC_DAIFMT_IB_NF;
3822 break;
3823 case 0x01:
3824 format |= SND_SOC_DAIFMT_NB_IF;
3825 break;
3826 default:
3827 /* SND_SOC_DAIFMT_NB_NF is default */
3828 break;
3829 }
3830
3831 /*
3832 * check "[prefix]bitclock-master"
3833 * check "[prefix]frame-master"
3834 * SND_SOC_DAIFMT_MASTER_MASK area
3835 */
3836 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3837 bit = !!of_get_property(np, prop, NULL);
3838 if (bit && bitclkmaster)
3839 *bitclkmaster = of_parse_phandle(np, prop, 0);
3840
3841 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3842 frame = !!of_get_property(np, prop, NULL);
3843 if (frame && framemaster)
3844 *framemaster = of_parse_phandle(np, prop, 0);
3845
3846 switch ((bit << 4) + frame) {
3847 case 0x11:
3848 format |= SND_SOC_DAIFMT_CBM_CFM;
3849 break;
3850 case 0x10:
3851 format |= SND_SOC_DAIFMT_CBM_CFS;
3852 break;
3853 case 0x01:
3854 format |= SND_SOC_DAIFMT_CBS_CFM;
3855 break;
3856 default:
3857 format |= SND_SOC_DAIFMT_CBS_CFS;
3858 break;
3859 }
3860
3861 return format;
3862}
3863EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3864
3865int snd_soc_get_dai_name(struct of_phandle_args *args,
3866 const char **dai_name)
3867{
3868 struct snd_soc_component *pos;
3869 struct device_node *component_of_node;
3870 int ret = -EPROBE_DEFER;
3871
3872 mutex_lock(&client_mutex);
3873 list_for_each_entry(pos, &component_list, list) {
3874 component_of_node = pos->dev->of_node;
3875 if (!component_of_node && pos->dev->parent)
3876 component_of_node = pos->dev->parent->of_node;
3877
3878 if (component_of_node != args->np)
3879 continue;
3880
3881 if (pos->driver->of_xlate_dai_name) {
3882 ret = pos->driver->of_xlate_dai_name(pos,
3883 args,
3884 dai_name);
3885 } else {
3886 int id = -1;
3887
3888 switch (args->args_count) {
3889 case 0:
3890 id = 0; /* same as dai_drv[0] */
3891 break;
3892 case 1:
3893 id = args->args[0];
3894 break;
3895 default:
3896 /* not supported */
3897 break;
3898 }
3899
3900 if (id < 0 || id >= pos->num_dai) {
3901 ret = -EINVAL;
3902 continue;
3903 }
3904
3905 ret = 0;
3906
3907 *dai_name = pos->dai_drv[id].name;
3908 if (!*dai_name)
3909 *dai_name = pos->name;
3910 }
3911
3912 break;
3913 }
3914 mutex_unlock(&client_mutex);
3915 return ret;
3916}
3917EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3918
3919int snd_soc_of_get_dai_name(struct device_node *of_node,
3920 const char **dai_name)
3921{
3922 struct of_phandle_args args;
3923 int ret;
3924
3925 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3926 "#sound-dai-cells", 0, &args);
3927 if (ret)
3928 return ret;
3929
3930 ret = snd_soc_get_dai_name(&args, dai_name);
3931
3932 of_node_put(args.np);
3933
3934 return ret;
3935}
3936EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3937
3938/*
3939 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3940 * @dev: Card device
3941 * @of_node: Device node
3942 * @dai_link: DAI link
3943 *
3944 * Builds an array of CODEC DAI components from the DAI link property
3945 * 'sound-dai'.
3946 * The array is set in the DAI link and the number of DAIs is set accordingly.
3947 * The device nodes in the array (of_node) must be dereferenced by the caller.
3948 *
3949 * Returns 0 for success
3950 */
3951int snd_soc_of_get_dai_link_codecs(struct device *dev,
3952 struct device_node *of_node,
3953 struct snd_soc_dai_link *dai_link)
3954{
3955 struct of_phandle_args args;
3956 struct snd_soc_dai_link_component *component;
3957 char *name;
3958 int index, num_codecs, ret;
3959
3960 /* Count the number of CODECs */
3961 name = "sound-dai";
3962 num_codecs = of_count_phandle_with_args(of_node, name,
3963 "#sound-dai-cells");
3964 if (num_codecs <= 0) {
3965 if (num_codecs == -ENOENT)
3966 dev_err(dev, "No 'sound-dai' property\n");
3967 else
3968 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3969 return num_codecs;
3970 }
3971 component = devm_kzalloc(dev,
3972 sizeof *component * num_codecs,
3973 GFP_KERNEL);
3974 if (!component)
3975 return -ENOMEM;
3976 dai_link->codecs = component;
3977 dai_link->num_codecs = num_codecs;
3978
3979 /* Parse the list */
3980 for (index = 0, component = dai_link->codecs;
3981 index < dai_link->num_codecs;
3982 index++, component++) {
3983 ret = of_parse_phandle_with_args(of_node, name,
3984 "#sound-dai-cells",
3985 index, &args);
3986 if (ret)
3987 goto err;
3988 component->of_node = args.np;
3989 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3990 if (ret < 0)
3991 goto err;
3992 }
3993 return 0;
3994err:
3995 for (index = 0, component = dai_link->codecs;
3996 index < dai_link->num_codecs;
3997 index++, component++) {
3998 if (!component->of_node)
3999 break;
4000 of_node_put(component->of_node);
4001 component->of_node = NULL;
4002 }
4003 dai_link->codecs = NULL;
4004 dai_link->num_codecs = 0;
4005 return ret;
4006}
4007EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4008
4009static int __init snd_soc_init(void)
4010{
4011 snd_soc_debugfs_init();
4012 snd_soc_util_init();
4013
4014 return platform_driver_register(&soc_driver);
4015}
4016module_init(snd_soc_init);
4017
4018static void __exit snd_soc_exit(void)
4019{
4020 snd_soc_util_exit();
4021 snd_soc_debugfs_exit();
4022
4023#ifdef CONFIG_DEBUG_FS
4024#endif
4025 platform_driver_unregister(&soc_driver);
4026}
4027module_exit(snd_soc_exit);
4028
4029/* Module information */
4030MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4031MODULE_DESCRIPTION("ALSA SoC Core");
4032MODULE_LICENSE("GPL");
4033MODULE_ALIAS("platform:soc-audio");
1/*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/bitops.h>
31#include <linux/debugfs.h>
32#include <linux/platform_device.h>
33#include <linux/ctype.h>
34#include <linux/slab.h>
35#include <sound/ac97_codec.h>
36#include <sound/core.h>
37#include <sound/jack.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include <sound/soc.h>
41#include <sound/initval.h>
42
43#define CREATE_TRACE_POINTS
44#include <trace/events/asoc.h>
45
46#define NAME_SIZE 32
47
48static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
49
50#ifdef CONFIG_DEBUG_FS
51struct dentry *snd_soc_debugfs_root;
52EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53#endif
54
55static DEFINE_MUTEX(client_mutex);
56static LIST_HEAD(card_list);
57static LIST_HEAD(dai_list);
58static LIST_HEAD(platform_list);
59static LIST_HEAD(codec_list);
60
61int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
62
63/*
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
67 */
68static int pmdown_time = 5000;
69module_param(pmdown_time, int, 0);
70MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72/* returns the minimum number of bytes needed to represent
73 * a particular given value */
74static int min_bytes_needed(unsigned long val)
75{
76 int c = 0;
77 int i;
78
79 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80 if (val & (1UL << i))
81 break;
82 c = (sizeof val * 8) - c;
83 if (!c || (c % 8))
84 c = (c + 8) / 8;
85 else
86 c /= 8;
87 return c;
88}
89
90/* fill buf which is 'len' bytes with a formatted
91 * string of the form 'reg: value\n' */
92static int format_register_str(struct snd_soc_codec *codec,
93 unsigned int reg, char *buf, size_t len)
94{
95 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96 int regsize = codec->driver->reg_word_size * 2;
97 int ret;
98 char tmpbuf[len + 1];
99 char regbuf[regsize + 1];
100
101 /* since tmpbuf is allocated on the stack, warn the callers if they
102 * try to abuse this function */
103 WARN_ON(len > 63);
104
105 /* +2 for ': ' and + 1 for '\n' */
106 if (wordsize + regsize + 2 + 1 != len)
107 return -EINVAL;
108
109 ret = snd_soc_read(codec , reg);
110 if (ret < 0) {
111 memset(regbuf, 'X', regsize);
112 regbuf[regsize] = '\0';
113 } else {
114 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
115 }
116
117 /* prepare the buffer */
118 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119 /* copy it back to the caller without the '\0' */
120 memcpy(buf, tmpbuf, len);
121
122 return 0;
123}
124
125/* codec register dump */
126static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127 size_t count, loff_t pos)
128{
129 int i, step = 1;
130 int wordsize, regsize;
131 int len;
132 size_t total = 0;
133 loff_t p = 0;
134
135 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136 regsize = codec->driver->reg_word_size * 2;
137
138 len = wordsize + regsize + 2 + 1;
139
140 if (!codec->driver->reg_cache_size)
141 return 0;
142
143 if (codec->driver->reg_cache_step)
144 step = codec->driver->reg_cache_step;
145
146 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147 if (codec->readable_register && !codec->readable_register(codec, i))
148 continue;
149 if (codec->driver->display_register) {
150 count += codec->driver->display_register(codec, buf + count,
151 PAGE_SIZE - count, i);
152 } else {
153 /* only support larger than PAGE_SIZE bytes debugfs
154 * entries for the default case */
155 if (p >= pos) {
156 if (total + len >= count - 1)
157 break;
158 format_register_str(codec, i, buf + total, len);
159 total += len;
160 }
161 p += len;
162 }
163 }
164
165 total = min(total, count - 1);
166
167 return total;
168}
169
170static ssize_t codec_reg_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
172{
173 struct snd_soc_pcm_runtime *rtd =
174 container_of(dev, struct snd_soc_pcm_runtime, dev);
175
176 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177}
178
179static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
180
181static ssize_t pmdown_time_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 struct snd_soc_pcm_runtime *rtd =
185 container_of(dev, struct snd_soc_pcm_runtime, dev);
186
187 return sprintf(buf, "%ld\n", rtd->pmdown_time);
188}
189
190static ssize_t pmdown_time_set(struct device *dev,
191 struct device_attribute *attr,
192 const char *buf, size_t count)
193{
194 struct snd_soc_pcm_runtime *rtd =
195 container_of(dev, struct snd_soc_pcm_runtime, dev);
196 int ret;
197
198 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
199 if (ret)
200 return ret;
201
202 return count;
203}
204
205static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206
207#ifdef CONFIG_DEBUG_FS
208static int codec_reg_open_file(struct inode *inode, struct file *file)
209{
210 file->private_data = inode->i_private;
211 return 0;
212}
213
214static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215 size_t count, loff_t *ppos)
216{
217 ssize_t ret;
218 struct snd_soc_codec *codec = file->private_data;
219 char *buf;
220
221 if (*ppos < 0 || !count)
222 return -EINVAL;
223
224 buf = kmalloc(count, GFP_KERNEL);
225 if (!buf)
226 return -ENOMEM;
227
228 ret = soc_codec_reg_show(codec, buf, count, *ppos);
229 if (ret >= 0) {
230 if (copy_to_user(user_buf, buf, ret)) {
231 kfree(buf);
232 return -EFAULT;
233 }
234 *ppos += ret;
235 }
236
237 kfree(buf);
238 return ret;
239}
240
241static ssize_t codec_reg_write_file(struct file *file,
242 const char __user *user_buf, size_t count, loff_t *ppos)
243{
244 char buf[32];
245 size_t buf_size;
246 char *start = buf;
247 unsigned long reg, value;
248 int step = 1;
249 struct snd_soc_codec *codec = file->private_data;
250
251 buf_size = min(count, (sizeof(buf)-1));
252 if (copy_from_user(buf, user_buf, buf_size))
253 return -EFAULT;
254 buf[buf_size] = 0;
255
256 if (codec->driver->reg_cache_step)
257 step = codec->driver->reg_cache_step;
258
259 while (*start == ' ')
260 start++;
261 reg = simple_strtoul(start, &start, 16);
262 while (*start == ' ')
263 start++;
264 if (strict_strtoul(start, 16, &value))
265 return -EINVAL;
266
267 /* Userspace has been fiddling around behind the kernel's back */
268 add_taint(TAINT_USER);
269
270 snd_soc_write(codec, reg, value);
271 return buf_size;
272}
273
274static const struct file_operations codec_reg_fops = {
275 .open = codec_reg_open_file,
276 .read = codec_reg_read_file,
277 .write = codec_reg_write_file,
278 .llseek = default_llseek,
279};
280
281static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282{
283 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284
285 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286 debugfs_card_root);
287 if (!codec->debugfs_codec_root) {
288 printk(KERN_WARNING
289 "ASoC: Failed to create codec debugfs directory\n");
290 return;
291 }
292
293 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294 &codec->cache_sync);
295 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
296 &codec->cache_only);
297
298 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299 codec->debugfs_codec_root,
300 codec, &codec_reg_fops);
301 if (!codec->debugfs_reg)
302 printk(KERN_WARNING
303 "ASoC: Failed to create codec register debugfs file\n");
304
305 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
306}
307
308static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309{
310 debugfs_remove_recursive(codec->debugfs_codec_root);
311}
312
313static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
314 size_t count, loff_t *ppos)
315{
316 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
317 ssize_t len, ret = 0;
318 struct snd_soc_codec *codec;
319
320 if (!buf)
321 return -ENOMEM;
322
323 list_for_each_entry(codec, &codec_list, list) {
324 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
325 codec->name);
326 if (len >= 0)
327 ret += len;
328 if (ret > PAGE_SIZE) {
329 ret = PAGE_SIZE;
330 break;
331 }
332 }
333
334 if (ret >= 0)
335 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
336
337 kfree(buf);
338
339 return ret;
340}
341
342static const struct file_operations codec_list_fops = {
343 .read = codec_list_read_file,
344 .llseek = default_llseek,/* read accesses f_pos */
345};
346
347static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
348 size_t count, loff_t *ppos)
349{
350 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
351 ssize_t len, ret = 0;
352 struct snd_soc_dai *dai;
353
354 if (!buf)
355 return -ENOMEM;
356
357 list_for_each_entry(dai, &dai_list, list) {
358 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
359 if (len >= 0)
360 ret += len;
361 if (ret > PAGE_SIZE) {
362 ret = PAGE_SIZE;
363 break;
364 }
365 }
366
367 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
368
369 kfree(buf);
370
371 return ret;
372}
373
374static const struct file_operations dai_list_fops = {
375 .read = dai_list_read_file,
376 .llseek = default_llseek,/* read accesses f_pos */
377};
378
379static ssize_t platform_list_read_file(struct file *file,
380 char __user *user_buf,
381 size_t count, loff_t *ppos)
382{
383 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
384 ssize_t len, ret = 0;
385 struct snd_soc_platform *platform;
386
387 if (!buf)
388 return -ENOMEM;
389
390 list_for_each_entry(platform, &platform_list, list) {
391 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
392 platform->name);
393 if (len >= 0)
394 ret += len;
395 if (ret > PAGE_SIZE) {
396 ret = PAGE_SIZE;
397 break;
398 }
399 }
400
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403 kfree(buf);
404
405 return ret;
406}
407
408static const struct file_operations platform_list_fops = {
409 .read = platform_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
411};
412
413static void soc_init_card_debugfs(struct snd_soc_card *card)
414{
415 card->debugfs_card_root = debugfs_create_dir(card->name,
416 snd_soc_debugfs_root);
417 if (!card->debugfs_card_root) {
418 dev_warn(card->dev,
419 "ASoC: Failed to create codec debugfs directory\n");
420 return;
421 }
422
423 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
424 card->debugfs_card_root,
425 &card->pop_time);
426 if (!card->debugfs_pop_time)
427 dev_warn(card->dev,
428 "Failed to create pop time debugfs file\n");
429}
430
431static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
432{
433 debugfs_remove_recursive(card->debugfs_card_root);
434}
435
436#else
437
438static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
439{
440}
441
442static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
443{
444}
445
446static inline void soc_init_card_debugfs(struct snd_soc_card *card)
447{
448}
449
450static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
451{
452}
453#endif
454
455#ifdef CONFIG_SND_SOC_AC97_BUS
456/* unregister ac97 codec */
457static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
458{
459 if (codec->ac97->dev.bus)
460 device_unregister(&codec->ac97->dev);
461 return 0;
462}
463
464/* stop no dev release warning */
465static void soc_ac97_device_release(struct device *dev){}
466
467/* register ac97 codec to bus */
468static int soc_ac97_dev_register(struct snd_soc_codec *codec)
469{
470 int err;
471
472 codec->ac97->dev.bus = &ac97_bus_type;
473 codec->ac97->dev.parent = codec->card->dev;
474 codec->ac97->dev.release = soc_ac97_device_release;
475
476 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
477 codec->card->snd_card->number, 0, codec->name);
478 err = device_register(&codec->ac97->dev);
479 if (err < 0) {
480 snd_printk(KERN_ERR "Can't register ac97 bus\n");
481 codec->ac97->dev.bus = NULL;
482 return err;
483 }
484 return 0;
485}
486#endif
487
488#ifdef CONFIG_PM_SLEEP
489/* powers down audio subsystem for suspend */
490int snd_soc_suspend(struct device *dev)
491{
492 struct snd_soc_card *card = dev_get_drvdata(dev);
493 struct snd_soc_codec *codec;
494 int i;
495
496 /* If the initialization of this soc device failed, there is no codec
497 * associated with it. Just bail out in this case.
498 */
499 if (list_empty(&card->codec_dev_list))
500 return 0;
501
502 /* Due to the resume being scheduled into a workqueue we could
503 * suspend before that's finished - wait for it to complete.
504 */
505 snd_power_lock(card->snd_card);
506 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
507 snd_power_unlock(card->snd_card);
508
509 /* we're going to block userspace touching us until resume completes */
510 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
511
512 /* mute any active DACs */
513 for (i = 0; i < card->num_rtd; i++) {
514 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
515 struct snd_soc_dai_driver *drv = dai->driver;
516
517 if (card->rtd[i].dai_link->ignore_suspend)
518 continue;
519
520 if (drv->ops->digital_mute && dai->playback_active)
521 drv->ops->digital_mute(dai, 1);
522 }
523
524 /* suspend all pcms */
525 for (i = 0; i < card->num_rtd; i++) {
526 if (card->rtd[i].dai_link->ignore_suspend)
527 continue;
528
529 snd_pcm_suspend_all(card->rtd[i].pcm);
530 }
531
532 if (card->suspend_pre)
533 card->suspend_pre(card);
534
535 for (i = 0; i < card->num_rtd; i++) {
536 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
537 struct snd_soc_platform *platform = card->rtd[i].platform;
538
539 if (card->rtd[i].dai_link->ignore_suspend)
540 continue;
541
542 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
543 cpu_dai->driver->suspend(cpu_dai);
544 if (platform->driver->suspend && !platform->suspended) {
545 platform->driver->suspend(cpu_dai);
546 platform->suspended = 1;
547 }
548 }
549
550 /* close any waiting streams and save state */
551 for (i = 0; i < card->num_rtd; i++) {
552 flush_delayed_work_sync(&card->rtd[i].delayed_work);
553 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
554 }
555
556 for (i = 0; i < card->num_rtd; i++) {
557 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
558
559 if (card->rtd[i].dai_link->ignore_suspend)
560 continue;
561
562 if (driver->playback.stream_name != NULL)
563 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
564 SND_SOC_DAPM_STREAM_SUSPEND);
565
566 if (driver->capture.stream_name != NULL)
567 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
568 SND_SOC_DAPM_STREAM_SUSPEND);
569 }
570
571 /* suspend all CODECs */
572 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
573 /* If there are paths active then the CODEC will be held with
574 * bias _ON and should not be suspended. */
575 if (!codec->suspended && codec->driver->suspend) {
576 switch (codec->dapm.bias_level) {
577 case SND_SOC_BIAS_STANDBY:
578 case SND_SOC_BIAS_OFF:
579 codec->driver->suspend(codec, PMSG_SUSPEND);
580 codec->suspended = 1;
581 codec->cache_sync = 1;
582 break;
583 default:
584 dev_dbg(codec->dev, "CODEC is on over suspend\n");
585 break;
586 }
587 }
588 }
589
590 for (i = 0; i < card->num_rtd; i++) {
591 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
592
593 if (card->rtd[i].dai_link->ignore_suspend)
594 continue;
595
596 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
597 cpu_dai->driver->suspend(cpu_dai);
598 }
599
600 if (card->suspend_post)
601 card->suspend_post(card);
602
603 return 0;
604}
605EXPORT_SYMBOL_GPL(snd_soc_suspend);
606
607/* deferred resume work, so resume can complete before we finished
608 * setting our codec back up, which can be very slow on I2C
609 */
610static void soc_resume_deferred(struct work_struct *work)
611{
612 struct snd_soc_card *card =
613 container_of(work, struct snd_soc_card, deferred_resume_work);
614 struct snd_soc_codec *codec;
615 int i;
616
617 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
618 * so userspace apps are blocked from touching us
619 */
620
621 dev_dbg(card->dev, "starting resume work\n");
622
623 /* Bring us up into D2 so that DAPM starts enabling things */
624 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
625
626 if (card->resume_pre)
627 card->resume_pre(card);
628
629 /* resume AC97 DAIs */
630 for (i = 0; i < card->num_rtd; i++) {
631 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
632
633 if (card->rtd[i].dai_link->ignore_suspend)
634 continue;
635
636 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
637 cpu_dai->driver->resume(cpu_dai);
638 }
639
640 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
641 /* If the CODEC was idle over suspend then it will have been
642 * left with bias OFF or STANDBY and suspended so we must now
643 * resume. Otherwise the suspend was suppressed.
644 */
645 if (codec->driver->resume && codec->suspended) {
646 switch (codec->dapm.bias_level) {
647 case SND_SOC_BIAS_STANDBY:
648 case SND_SOC_BIAS_OFF:
649 codec->driver->resume(codec);
650 codec->suspended = 0;
651 break;
652 default:
653 dev_dbg(codec->dev, "CODEC was on over suspend\n");
654 break;
655 }
656 }
657 }
658
659 for (i = 0; i < card->num_rtd; i++) {
660 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
661
662 if (card->rtd[i].dai_link->ignore_suspend)
663 continue;
664
665 if (driver->playback.stream_name != NULL)
666 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
667 SND_SOC_DAPM_STREAM_RESUME);
668
669 if (driver->capture.stream_name != NULL)
670 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
671 SND_SOC_DAPM_STREAM_RESUME);
672 }
673
674 /* unmute any active DACs */
675 for (i = 0; i < card->num_rtd; i++) {
676 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
677 struct snd_soc_dai_driver *drv = dai->driver;
678
679 if (card->rtd[i].dai_link->ignore_suspend)
680 continue;
681
682 if (drv->ops->digital_mute && dai->playback_active)
683 drv->ops->digital_mute(dai, 0);
684 }
685
686 for (i = 0; i < card->num_rtd; i++) {
687 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
688 struct snd_soc_platform *platform = card->rtd[i].platform;
689
690 if (card->rtd[i].dai_link->ignore_suspend)
691 continue;
692
693 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
694 cpu_dai->driver->resume(cpu_dai);
695 if (platform->driver->resume && platform->suspended) {
696 platform->driver->resume(cpu_dai);
697 platform->suspended = 0;
698 }
699 }
700
701 if (card->resume_post)
702 card->resume_post(card);
703
704 dev_dbg(card->dev, "resume work completed\n");
705
706 /* userspace can access us now we are back as we were before */
707 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
708}
709
710/* powers up audio subsystem after a suspend */
711int snd_soc_resume(struct device *dev)
712{
713 struct snd_soc_card *card = dev_get_drvdata(dev);
714 int i, ac97_control = 0;
715
716 /* AC97 devices might have other drivers hanging off them so
717 * need to resume immediately. Other drivers don't have that
718 * problem and may take a substantial amount of time to resume
719 * due to I/O costs and anti-pop so handle them out of line.
720 */
721 for (i = 0; i < card->num_rtd; i++) {
722 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
723 ac97_control |= cpu_dai->driver->ac97_control;
724 }
725 if (ac97_control) {
726 dev_dbg(dev, "Resuming AC97 immediately\n");
727 soc_resume_deferred(&card->deferred_resume_work);
728 } else {
729 dev_dbg(dev, "Scheduling resume work\n");
730 if (!schedule_work(&card->deferred_resume_work))
731 dev_err(dev, "resume work item may be lost\n");
732 }
733
734 return 0;
735}
736EXPORT_SYMBOL_GPL(snd_soc_resume);
737#else
738#define snd_soc_suspend NULL
739#define snd_soc_resume NULL
740#endif
741
742static struct snd_soc_dai_ops null_dai_ops = {
743};
744
745static int soc_bind_dai_link(struct snd_soc_card *card, int num)
746{
747 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
748 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
749 struct snd_soc_codec *codec;
750 struct snd_soc_platform *platform;
751 struct snd_soc_dai *codec_dai, *cpu_dai;
752 const char *platform_name;
753
754 if (rtd->complete)
755 return 1;
756 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
757
758 /* do we already have the CPU DAI for this link ? */
759 if (rtd->cpu_dai) {
760 goto find_codec;
761 }
762 /* no, then find CPU DAI from registered DAIs*/
763 list_for_each_entry(cpu_dai, &dai_list, list) {
764 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
765 rtd->cpu_dai = cpu_dai;
766 goto find_codec;
767 }
768 }
769 dev_dbg(card->dev, "CPU DAI %s not registered\n",
770 dai_link->cpu_dai_name);
771
772find_codec:
773 /* do we already have the CODEC for this link ? */
774 if (rtd->codec) {
775 goto find_platform;
776 }
777
778 /* no, then find CODEC from registered CODECs*/
779 list_for_each_entry(codec, &codec_list, list) {
780 if (!strcmp(codec->name, dai_link->codec_name)) {
781 rtd->codec = codec;
782
783 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
784 list_for_each_entry(codec_dai, &dai_list, list) {
785 if (codec->dev == codec_dai->dev &&
786 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
787 rtd->codec_dai = codec_dai;
788 goto find_platform;
789 }
790 }
791 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
792 dai_link->codec_dai_name);
793
794 goto find_platform;
795 }
796 }
797 dev_dbg(card->dev, "CODEC %s not registered\n",
798 dai_link->codec_name);
799
800find_platform:
801 /* do we need a platform? */
802 if (rtd->platform)
803 goto out;
804
805 /* if there's no platform we match on the empty platform */
806 platform_name = dai_link->platform_name;
807 if (!platform_name)
808 platform_name = "snd-soc-dummy";
809
810 /* no, then find one from the set of registered platforms */
811 list_for_each_entry(platform, &platform_list, list) {
812 if (!strcmp(platform->name, platform_name)) {
813 rtd->platform = platform;
814 goto out;
815 }
816 }
817
818 dev_dbg(card->dev, "platform %s not registered\n",
819 dai_link->platform_name);
820 return 0;
821
822out:
823 /* mark rtd as complete if we found all 4 of our client devices */
824 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
825 rtd->complete = 1;
826 card->num_rtd++;
827 }
828 return 1;
829}
830
831static void soc_remove_codec(struct snd_soc_codec *codec)
832{
833 int err;
834
835 if (codec->driver->remove) {
836 err = codec->driver->remove(codec);
837 if (err < 0)
838 dev_err(codec->dev,
839 "asoc: failed to remove %s: %d\n",
840 codec->name, err);
841 }
842
843 /* Make sure all DAPM widgets are freed */
844 snd_soc_dapm_free(&codec->dapm);
845
846 soc_cleanup_codec_debugfs(codec);
847 codec->probed = 0;
848 list_del(&codec->card_list);
849 module_put(codec->dev->driver->owner);
850}
851
852static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
853{
854 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
855 struct snd_soc_codec *codec = rtd->codec;
856 struct snd_soc_platform *platform = rtd->platform;
857 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
858 int err;
859
860 /* unregister the rtd device */
861 if (rtd->dev_registered) {
862 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
863 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
864 device_unregister(&rtd->dev);
865 rtd->dev_registered = 0;
866 }
867
868 /* remove the CODEC DAI */
869 if (codec_dai && codec_dai->probed &&
870 codec_dai->driver->remove_order == order) {
871 if (codec_dai->driver->remove) {
872 err = codec_dai->driver->remove(codec_dai);
873 if (err < 0)
874 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
875 }
876 codec_dai->probed = 0;
877 list_del(&codec_dai->card_list);
878 }
879
880 /* remove the platform */
881 if (platform && platform->probed &&
882 platform->driver->remove_order == order) {
883 if (platform->driver->remove) {
884 err = platform->driver->remove(platform);
885 if (err < 0)
886 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
887 }
888 platform->probed = 0;
889 list_del(&platform->card_list);
890 module_put(platform->dev->driver->owner);
891 }
892
893 /* remove the CODEC */
894 if (codec && codec->probed &&
895 codec->driver->remove_order == order)
896 soc_remove_codec(codec);
897
898 /* remove the cpu_dai */
899 if (cpu_dai && cpu_dai->probed &&
900 cpu_dai->driver->remove_order == order) {
901 if (cpu_dai->driver->remove) {
902 err = cpu_dai->driver->remove(cpu_dai);
903 if (err < 0)
904 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
905 }
906 cpu_dai->probed = 0;
907 list_del(&cpu_dai->card_list);
908 module_put(cpu_dai->dev->driver->owner);
909 }
910}
911
912static void soc_remove_dai_links(struct snd_soc_card *card)
913{
914 int dai, order;
915
916 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
917 order++) {
918 for (dai = 0; dai < card->num_rtd; dai++)
919 soc_remove_dai_link(card, dai, order);
920 }
921 card->num_rtd = 0;
922}
923
924static void soc_set_name_prefix(struct snd_soc_card *card,
925 struct snd_soc_codec *codec)
926{
927 int i;
928
929 if (card->codec_conf == NULL)
930 return;
931
932 for (i = 0; i < card->num_configs; i++) {
933 struct snd_soc_codec_conf *map = &card->codec_conf[i];
934 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
935 codec->name_prefix = map->name_prefix;
936 break;
937 }
938 }
939}
940
941static int soc_probe_codec(struct snd_soc_card *card,
942 struct snd_soc_codec *codec)
943{
944 int ret = 0;
945 const struct snd_soc_codec_driver *driver = codec->driver;
946
947 codec->card = card;
948 codec->dapm.card = card;
949 soc_set_name_prefix(card, codec);
950
951 if (!try_module_get(codec->dev->driver->owner))
952 return -ENODEV;
953
954 soc_init_codec_debugfs(codec);
955
956 if (driver->dapm_widgets)
957 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
958 driver->num_dapm_widgets);
959
960 if (driver->probe) {
961 ret = driver->probe(codec);
962 if (ret < 0) {
963 dev_err(codec->dev,
964 "asoc: failed to probe CODEC %s: %d\n",
965 codec->name, ret);
966 goto err_probe;
967 }
968 }
969
970 if (driver->controls)
971 snd_soc_add_controls(codec, driver->controls,
972 driver->num_controls);
973 if (driver->dapm_routes)
974 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
975 driver->num_dapm_routes);
976
977 /* mark codec as probed and add to card codec list */
978 codec->probed = 1;
979 list_add(&codec->card_list, &card->codec_dev_list);
980 list_add(&codec->dapm.list, &card->dapm_list);
981
982 return 0;
983
984err_probe:
985 soc_cleanup_codec_debugfs(codec);
986 module_put(codec->dev->driver->owner);
987
988 return ret;
989}
990
991static int soc_probe_platform(struct snd_soc_card *card,
992 struct snd_soc_platform *platform)
993{
994 int ret = 0;
995 const struct snd_soc_platform_driver *driver = platform->driver;
996
997 platform->card = card;
998 platform->dapm.card = card;
999
1000 if (!try_module_get(platform->dev->driver->owner))
1001 return -ENODEV;
1002
1003 if (driver->dapm_widgets)
1004 snd_soc_dapm_new_controls(&platform->dapm,
1005 driver->dapm_widgets, driver->num_dapm_widgets);
1006
1007 if (driver->probe) {
1008 ret = driver->probe(platform);
1009 if (ret < 0) {
1010 dev_err(platform->dev,
1011 "asoc: failed to probe platform %s: %d\n",
1012 platform->name, ret);
1013 goto err_probe;
1014 }
1015 }
1016
1017 if (driver->controls)
1018 snd_soc_add_platform_controls(platform, driver->controls,
1019 driver->num_controls);
1020 if (driver->dapm_routes)
1021 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1022 driver->num_dapm_routes);
1023
1024 /* mark platform as probed and add to card platform list */
1025 platform->probed = 1;
1026 list_add(&platform->card_list, &card->platform_dev_list);
1027 list_add(&platform->dapm.list, &card->dapm_list);
1028
1029 return 0;
1030
1031err_probe:
1032 module_put(platform->dev->driver->owner);
1033
1034 return ret;
1035}
1036
1037static void rtd_release(struct device *dev) {}
1038
1039static int soc_post_component_init(struct snd_soc_card *card,
1040 struct snd_soc_codec *codec,
1041 int num, int dailess)
1042{
1043 struct snd_soc_dai_link *dai_link = NULL;
1044 struct snd_soc_aux_dev *aux_dev = NULL;
1045 struct snd_soc_pcm_runtime *rtd;
1046 const char *temp, *name;
1047 int ret = 0;
1048
1049 if (!dailess) {
1050 dai_link = &card->dai_link[num];
1051 rtd = &card->rtd[num];
1052 name = dai_link->name;
1053 } else {
1054 aux_dev = &card->aux_dev[num];
1055 rtd = &card->rtd_aux[num];
1056 name = aux_dev->name;
1057 }
1058 rtd->card = card;
1059
1060 /* machine controls, routes and widgets are not prefixed */
1061 temp = codec->name_prefix;
1062 codec->name_prefix = NULL;
1063
1064 /* do machine specific initialization */
1065 if (!dailess && dai_link->init)
1066 ret = dai_link->init(rtd);
1067 else if (dailess && aux_dev->init)
1068 ret = aux_dev->init(&codec->dapm);
1069 if (ret < 0) {
1070 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1071 return ret;
1072 }
1073 codec->name_prefix = temp;
1074
1075 /* Make sure all DAPM widgets are instantiated */
1076 snd_soc_dapm_new_widgets(&codec->dapm);
1077
1078 /* register the rtd device */
1079 rtd->codec = codec;
1080 rtd->dev.parent = card->dev;
1081 rtd->dev.release = rtd_release;
1082 rtd->dev.init_name = name;
1083 mutex_init(&rtd->pcm_mutex);
1084 ret = device_register(&rtd->dev);
1085 if (ret < 0) {
1086 dev_err(card->dev,
1087 "asoc: failed to register runtime device: %d\n", ret);
1088 return ret;
1089 }
1090 rtd->dev_registered = 1;
1091
1092 /* add DAPM sysfs entries for this codec */
1093 ret = snd_soc_dapm_sys_add(&rtd->dev);
1094 if (ret < 0)
1095 dev_err(codec->dev,
1096 "asoc: failed to add codec dapm sysfs entries: %d\n",
1097 ret);
1098
1099 /* add codec sysfs entries */
1100 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1101 if (ret < 0)
1102 dev_err(codec->dev,
1103 "asoc: failed to add codec sysfs files: %d\n", ret);
1104
1105 return 0;
1106}
1107
1108static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order)
1109{
1110 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1111 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1112 struct snd_soc_codec *codec = rtd->codec;
1113 struct snd_soc_platform *platform = rtd->platform;
1114 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1115 int ret;
1116
1117 dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1118 card->name, num, order);
1119
1120 /* config components */
1121 codec_dai->codec = codec;
1122 cpu_dai->platform = platform;
1123 codec_dai->card = card;
1124 cpu_dai->card = card;
1125
1126 /* set default power off timeout */
1127 rtd->pmdown_time = pmdown_time;
1128
1129 /* probe the cpu_dai */
1130 if (!cpu_dai->probed &&
1131 cpu_dai->driver->probe_order == order) {
1132 if (!try_module_get(cpu_dai->dev->driver->owner))
1133 return -ENODEV;
1134
1135 if (cpu_dai->driver->probe) {
1136 ret = cpu_dai->driver->probe(cpu_dai);
1137 if (ret < 0) {
1138 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1139 cpu_dai->name);
1140 module_put(cpu_dai->dev->driver->owner);
1141 return ret;
1142 }
1143 }
1144 cpu_dai->probed = 1;
1145 /* mark cpu_dai as probed and add to card dai list */
1146 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1147 }
1148
1149 /* probe the CODEC */
1150 if (!codec->probed &&
1151 codec->driver->probe_order == order) {
1152 ret = soc_probe_codec(card, codec);
1153 if (ret < 0)
1154 return ret;
1155 }
1156
1157 /* probe the platform */
1158 if (!platform->probed &&
1159 platform->driver->probe_order == order) {
1160 ret = soc_probe_platform(card, platform);
1161 if (ret < 0)
1162 return ret;
1163 }
1164
1165 /* probe the CODEC DAI */
1166 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1167 if (codec_dai->driver->probe) {
1168 ret = codec_dai->driver->probe(codec_dai);
1169 if (ret < 0) {
1170 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1171 codec_dai->name);
1172 return ret;
1173 }
1174 }
1175
1176 /* mark codec_dai as probed and add to card dai list */
1177 codec_dai->probed = 1;
1178 list_add(&codec_dai->card_list, &card->dai_dev_list);
1179 }
1180
1181 /* complete DAI probe during last probe */
1182 if (order != SND_SOC_COMP_ORDER_LAST)
1183 return 0;
1184
1185 ret = soc_post_component_init(card, codec, num, 0);
1186 if (ret)
1187 return ret;
1188
1189 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1190 if (ret < 0)
1191 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1192
1193 /* create the pcm */
1194 ret = soc_new_pcm(rtd, num);
1195 if (ret < 0) {
1196 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1197 return ret;
1198 }
1199
1200 /* add platform data for AC97 devices */
1201 if (rtd->codec_dai->driver->ac97_control)
1202 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1203
1204 return 0;
1205}
1206
1207#ifdef CONFIG_SND_SOC_AC97_BUS
1208static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1209{
1210 int ret;
1211
1212 /* Only instantiate AC97 if not already done by the adaptor
1213 * for the generic AC97 subsystem.
1214 */
1215 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1216 /*
1217 * It is possible that the AC97 device is already registered to
1218 * the device subsystem. This happens when the device is created
1219 * via snd_ac97_mixer(). Currently only SoC codec that does so
1220 * is the generic AC97 glue but others migh emerge.
1221 *
1222 * In those cases we don't try to register the device again.
1223 */
1224 if (!rtd->codec->ac97_created)
1225 return 0;
1226
1227 ret = soc_ac97_dev_register(rtd->codec);
1228 if (ret < 0) {
1229 printk(KERN_ERR "asoc: AC97 device register failed\n");
1230 return ret;
1231 }
1232
1233 rtd->codec->ac97_registered = 1;
1234 }
1235 return 0;
1236}
1237
1238static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1239{
1240 if (codec->ac97_registered) {
1241 soc_ac97_dev_unregister(codec);
1242 codec->ac97_registered = 0;
1243 }
1244}
1245#endif
1246
1247static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1248{
1249 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1250 struct snd_soc_codec *codec;
1251 int ret = -ENODEV;
1252
1253 /* find CODEC from registered CODECs*/
1254 list_for_each_entry(codec, &codec_list, list) {
1255 if (!strcmp(codec->name, aux_dev->codec_name)) {
1256 if (codec->probed) {
1257 dev_err(codec->dev,
1258 "asoc: codec already probed");
1259 ret = -EBUSY;
1260 goto out;
1261 }
1262 goto found;
1263 }
1264 }
1265 /* codec not found */
1266 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1267 goto out;
1268
1269found:
1270 ret = soc_probe_codec(card, codec);
1271 if (ret < 0)
1272 return ret;
1273
1274 ret = soc_post_component_init(card, codec, num, 1);
1275
1276out:
1277 return ret;
1278}
1279
1280static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1281{
1282 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1283 struct snd_soc_codec *codec = rtd->codec;
1284
1285 /* unregister the rtd device */
1286 if (rtd->dev_registered) {
1287 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1288 device_unregister(&rtd->dev);
1289 rtd->dev_registered = 0;
1290 }
1291
1292 if (codec && codec->probed)
1293 soc_remove_codec(codec);
1294}
1295
1296static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1297 enum snd_soc_compress_type compress_type)
1298{
1299 int ret;
1300
1301 if (codec->cache_init)
1302 return 0;
1303
1304 /* override the compress_type if necessary */
1305 if (compress_type && codec->compress_type != compress_type)
1306 codec->compress_type = compress_type;
1307 ret = snd_soc_cache_init(codec);
1308 if (ret < 0) {
1309 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1310 ret);
1311 return ret;
1312 }
1313 codec->cache_init = 1;
1314 return 0;
1315}
1316
1317static void snd_soc_instantiate_card(struct snd_soc_card *card)
1318{
1319 struct snd_soc_codec *codec;
1320 struct snd_soc_codec_conf *codec_conf;
1321 enum snd_soc_compress_type compress_type;
1322 int ret, i, order;
1323
1324 mutex_lock(&card->mutex);
1325
1326 if (card->instantiated) {
1327 mutex_unlock(&card->mutex);
1328 return;
1329 }
1330
1331 /* bind DAIs */
1332 for (i = 0; i < card->num_links; i++)
1333 soc_bind_dai_link(card, i);
1334
1335 /* bind completed ? */
1336 if (card->num_rtd != card->num_links) {
1337 mutex_unlock(&card->mutex);
1338 return;
1339 }
1340
1341 /* initialize the register cache for each available codec */
1342 list_for_each_entry(codec, &codec_list, list) {
1343 if (codec->cache_init)
1344 continue;
1345 /* by default we don't override the compress_type */
1346 compress_type = 0;
1347 /* check to see if we need to override the compress_type */
1348 for (i = 0; i < card->num_configs; ++i) {
1349 codec_conf = &card->codec_conf[i];
1350 if (!strcmp(codec->name, codec_conf->dev_name)) {
1351 compress_type = codec_conf->compress_type;
1352 if (compress_type && compress_type
1353 != codec->compress_type)
1354 break;
1355 }
1356 }
1357 ret = snd_soc_init_codec_cache(codec, compress_type);
1358 if (ret < 0) {
1359 mutex_unlock(&card->mutex);
1360 return;
1361 }
1362 }
1363
1364 /* card bind complete so register a sound card */
1365 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1366 card->owner, 0, &card->snd_card);
1367 if (ret < 0) {
1368 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1369 card->name);
1370 mutex_unlock(&card->mutex);
1371 return;
1372 }
1373 card->snd_card->dev = card->dev;
1374
1375 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1376 card->dapm.dev = card->dev;
1377 card->dapm.card = card;
1378 list_add(&card->dapm.list, &card->dapm_list);
1379
1380#ifdef CONFIG_DEBUG_FS
1381 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1382#endif
1383
1384#ifdef CONFIG_PM_SLEEP
1385 /* deferred resume work */
1386 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1387#endif
1388
1389 if (card->dapm_widgets)
1390 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1391 card->num_dapm_widgets);
1392
1393 /* initialise the sound card only once */
1394 if (card->probe) {
1395 ret = card->probe(card);
1396 if (ret < 0)
1397 goto card_probe_error;
1398 }
1399
1400 /* early DAI link probe */
1401 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1402 order++) {
1403 for (i = 0; i < card->num_links; i++) {
1404 ret = soc_probe_dai_link(card, i, order);
1405 if (ret < 0) {
1406 pr_err("asoc: failed to instantiate card %s: %d\n",
1407 card->name, ret);
1408 goto probe_dai_err;
1409 }
1410 }
1411 }
1412
1413 for (i = 0; i < card->num_aux_devs; i++) {
1414 ret = soc_probe_aux_dev(card, i);
1415 if (ret < 0) {
1416 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1417 card->name, ret);
1418 goto probe_aux_dev_err;
1419 }
1420 }
1421
1422 /* We should have a non-codec control add function but we don't */
1423 if (card->controls)
1424 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1425 struct snd_soc_codec,
1426 card_list),
1427 card->controls,
1428 card->num_controls);
1429
1430 if (card->dapm_routes)
1431 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1432 card->num_dapm_routes);
1433
1434 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1435 "%s", card->name);
1436 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1437 "%s", card->long_name ? card->long_name : card->name);
1438 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1439 "%s", card->driver_name ? card->driver_name : card->name);
1440 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1441 switch (card->snd_card->driver[i]) {
1442 case '_':
1443 case '-':
1444 case '\0':
1445 break;
1446 default:
1447 if (!isalnum(card->snd_card->driver[i]))
1448 card->snd_card->driver[i] = '_';
1449 break;
1450 }
1451 }
1452
1453 if (card->late_probe) {
1454 ret = card->late_probe(card);
1455 if (ret < 0) {
1456 dev_err(card->dev, "%s late_probe() failed: %d\n",
1457 card->name, ret);
1458 goto probe_aux_dev_err;
1459 }
1460 }
1461
1462 ret = snd_card_register(card->snd_card);
1463 if (ret < 0) {
1464 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1465 goto probe_aux_dev_err;
1466 }
1467
1468#ifdef CONFIG_SND_SOC_AC97_BUS
1469 /* register any AC97 codecs */
1470 for (i = 0; i < card->num_rtd; i++) {
1471 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1472 if (ret < 0) {
1473 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1474 while (--i >= 0)
1475 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1476 goto probe_aux_dev_err;
1477 }
1478 }
1479#endif
1480
1481 card->instantiated = 1;
1482 mutex_unlock(&card->mutex);
1483 return;
1484
1485probe_aux_dev_err:
1486 for (i = 0; i < card->num_aux_devs; i++)
1487 soc_remove_aux_dev(card, i);
1488
1489probe_dai_err:
1490 soc_remove_dai_links(card);
1491
1492card_probe_error:
1493 if (card->remove)
1494 card->remove(card);
1495
1496 snd_card_free(card->snd_card);
1497
1498 mutex_unlock(&card->mutex);
1499}
1500
1501/*
1502 * Attempt to initialise any uninitialised cards. Must be called with
1503 * client_mutex.
1504 */
1505static void snd_soc_instantiate_cards(void)
1506{
1507 struct snd_soc_card *card;
1508 list_for_each_entry(card, &card_list, list)
1509 snd_soc_instantiate_card(card);
1510}
1511
1512/* probes a new socdev */
1513static int soc_probe(struct platform_device *pdev)
1514{
1515 struct snd_soc_card *card = platform_get_drvdata(pdev);
1516 int ret = 0;
1517
1518 /*
1519 * no card, so machine driver should be registering card
1520 * we should not be here in that case so ret error
1521 */
1522 if (!card)
1523 return -EINVAL;
1524
1525 /* Bodge while we unpick instantiation */
1526 card->dev = &pdev->dev;
1527
1528 ret = snd_soc_register_card(card);
1529 if (ret != 0) {
1530 dev_err(&pdev->dev, "Failed to register card\n");
1531 return ret;
1532 }
1533
1534 return 0;
1535}
1536
1537static int soc_cleanup_card_resources(struct snd_soc_card *card)
1538{
1539 int i;
1540
1541 /* make sure any delayed work runs */
1542 for (i = 0; i < card->num_rtd; i++) {
1543 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1544 flush_delayed_work_sync(&rtd->delayed_work);
1545 }
1546
1547 /* remove auxiliary devices */
1548 for (i = 0; i < card->num_aux_devs; i++)
1549 soc_remove_aux_dev(card, i);
1550
1551 /* remove and free each DAI */
1552 soc_remove_dai_links(card);
1553
1554 soc_cleanup_card_debugfs(card);
1555
1556 /* remove the card */
1557 if (card->remove)
1558 card->remove(card);
1559
1560 snd_soc_dapm_free(&card->dapm);
1561
1562 kfree(card->rtd);
1563 snd_card_free(card->snd_card);
1564 return 0;
1565
1566}
1567
1568/* removes a socdev */
1569static int soc_remove(struct platform_device *pdev)
1570{
1571 struct snd_soc_card *card = platform_get_drvdata(pdev);
1572
1573 snd_soc_unregister_card(card);
1574 return 0;
1575}
1576
1577int snd_soc_poweroff(struct device *dev)
1578{
1579 struct snd_soc_card *card = dev_get_drvdata(dev);
1580 int i;
1581
1582 if (!card->instantiated)
1583 return 0;
1584
1585 /* Flush out pmdown_time work - we actually do want to run it
1586 * now, we're shutting down so no imminent restart. */
1587 for (i = 0; i < card->num_rtd; i++) {
1588 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1589 flush_delayed_work_sync(&rtd->delayed_work);
1590 }
1591
1592 snd_soc_dapm_shutdown(card);
1593
1594 return 0;
1595}
1596EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1597
1598const struct dev_pm_ops snd_soc_pm_ops = {
1599 .suspend = snd_soc_suspend,
1600 .resume = snd_soc_resume,
1601 .poweroff = snd_soc_poweroff,
1602};
1603EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1604
1605/* ASoC platform driver */
1606static struct platform_driver soc_driver = {
1607 .driver = {
1608 .name = "soc-audio",
1609 .owner = THIS_MODULE,
1610 .pm = &snd_soc_pm_ops,
1611 },
1612 .probe = soc_probe,
1613 .remove = soc_remove,
1614};
1615
1616/**
1617 * snd_soc_codec_volatile_register: Report if a register is volatile.
1618 *
1619 * @codec: CODEC to query.
1620 * @reg: Register to query.
1621 *
1622 * Boolean function indiciating if a CODEC register is volatile.
1623 */
1624int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1625 unsigned int reg)
1626{
1627 if (codec->volatile_register)
1628 return codec->volatile_register(codec, reg);
1629 else
1630 return 0;
1631}
1632EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1633
1634/**
1635 * snd_soc_codec_readable_register: Report if a register is readable.
1636 *
1637 * @codec: CODEC to query.
1638 * @reg: Register to query.
1639 *
1640 * Boolean function indicating if a CODEC register is readable.
1641 */
1642int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1643 unsigned int reg)
1644{
1645 if (codec->readable_register)
1646 return codec->readable_register(codec, reg);
1647 else
1648 return 1;
1649}
1650EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1651
1652/**
1653 * snd_soc_codec_writable_register: Report if a register is writable.
1654 *
1655 * @codec: CODEC to query.
1656 * @reg: Register to query.
1657 *
1658 * Boolean function indicating if a CODEC register is writable.
1659 */
1660int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1661 unsigned int reg)
1662{
1663 if (codec->writable_register)
1664 return codec->writable_register(codec, reg);
1665 else
1666 return 1;
1667}
1668EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1669
1670int snd_soc_platform_read(struct snd_soc_platform *platform,
1671 unsigned int reg)
1672{
1673 unsigned int ret;
1674
1675 if (!platform->driver->read) {
1676 dev_err(platform->dev, "platform has no read back\n");
1677 return -1;
1678 }
1679
1680 ret = platform->driver->read(platform, reg);
1681 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
1682 trace_snd_soc_preg_read(platform, reg, ret);
1683
1684 return ret;
1685}
1686EXPORT_SYMBOL_GPL(snd_soc_platform_read);
1687
1688int snd_soc_platform_write(struct snd_soc_platform *platform,
1689 unsigned int reg, unsigned int val)
1690{
1691 if (!platform->driver->write) {
1692 dev_err(platform->dev, "platform has no write back\n");
1693 return -1;
1694 }
1695
1696 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
1697 trace_snd_soc_preg_write(platform, reg, val);
1698 return platform->driver->write(platform, reg, val);
1699}
1700EXPORT_SYMBOL_GPL(snd_soc_platform_write);
1701
1702/**
1703 * snd_soc_new_ac97_codec - initailise AC97 device
1704 * @codec: audio codec
1705 * @ops: AC97 bus operations
1706 * @num: AC97 codec number
1707 *
1708 * Initialises AC97 codec resources for use by ad-hoc devices only.
1709 */
1710int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1711 struct snd_ac97_bus_ops *ops, int num)
1712{
1713 mutex_lock(&codec->mutex);
1714
1715 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1716 if (codec->ac97 == NULL) {
1717 mutex_unlock(&codec->mutex);
1718 return -ENOMEM;
1719 }
1720
1721 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1722 if (codec->ac97->bus == NULL) {
1723 kfree(codec->ac97);
1724 codec->ac97 = NULL;
1725 mutex_unlock(&codec->mutex);
1726 return -ENOMEM;
1727 }
1728
1729 codec->ac97->bus->ops = ops;
1730 codec->ac97->num = num;
1731
1732 /*
1733 * Mark the AC97 device to be created by us. This way we ensure that the
1734 * device will be registered with the device subsystem later on.
1735 */
1736 codec->ac97_created = 1;
1737
1738 mutex_unlock(&codec->mutex);
1739 return 0;
1740}
1741EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1742
1743/**
1744 * snd_soc_free_ac97_codec - free AC97 codec device
1745 * @codec: audio codec
1746 *
1747 * Frees AC97 codec device resources.
1748 */
1749void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1750{
1751 mutex_lock(&codec->mutex);
1752#ifdef CONFIG_SND_SOC_AC97_BUS
1753 soc_unregister_ac97_dai_link(codec);
1754#endif
1755 kfree(codec->ac97->bus);
1756 kfree(codec->ac97);
1757 codec->ac97 = NULL;
1758 codec->ac97_created = 0;
1759 mutex_unlock(&codec->mutex);
1760}
1761EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1762
1763unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
1764{
1765 unsigned int ret;
1766
1767 ret = codec->read(codec, reg);
1768 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1769 trace_snd_soc_reg_read(codec, reg, ret);
1770
1771 return ret;
1772}
1773EXPORT_SYMBOL_GPL(snd_soc_read);
1774
1775unsigned int snd_soc_write(struct snd_soc_codec *codec,
1776 unsigned int reg, unsigned int val)
1777{
1778 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
1779 trace_snd_soc_reg_write(codec, reg, val);
1780 return codec->write(codec, reg, val);
1781}
1782EXPORT_SYMBOL_GPL(snd_soc_write);
1783
1784unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
1785 unsigned int reg, const void *data, size_t len)
1786{
1787 return codec->bulk_write_raw(codec, reg, data, len);
1788}
1789EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
1790
1791/**
1792 * snd_soc_update_bits - update codec register bits
1793 * @codec: audio codec
1794 * @reg: codec register
1795 * @mask: register mask
1796 * @value: new value
1797 *
1798 * Writes new register value.
1799 *
1800 * Returns 1 for change, 0 for no change, or negative error code.
1801 */
1802int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1803 unsigned int mask, unsigned int value)
1804{
1805 int change;
1806 unsigned int old, new;
1807 int ret;
1808
1809 ret = snd_soc_read(codec, reg);
1810 if (ret < 0)
1811 return ret;
1812
1813 old = ret;
1814 new = (old & ~mask) | (value & mask);
1815 change = old != new;
1816 if (change) {
1817 ret = snd_soc_write(codec, reg, new);
1818 if (ret < 0)
1819 return ret;
1820 }
1821
1822 return change;
1823}
1824EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1825
1826/**
1827 * snd_soc_update_bits_locked - update codec register bits
1828 * @codec: audio codec
1829 * @reg: codec register
1830 * @mask: register mask
1831 * @value: new value
1832 *
1833 * Writes new register value, and takes the codec mutex.
1834 *
1835 * Returns 1 for change else 0.
1836 */
1837int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1838 unsigned short reg, unsigned int mask,
1839 unsigned int value)
1840{
1841 int change;
1842
1843 mutex_lock(&codec->mutex);
1844 change = snd_soc_update_bits(codec, reg, mask, value);
1845 mutex_unlock(&codec->mutex);
1846
1847 return change;
1848}
1849EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1850
1851/**
1852 * snd_soc_test_bits - test register for change
1853 * @codec: audio codec
1854 * @reg: codec register
1855 * @mask: register mask
1856 * @value: new value
1857 *
1858 * Tests a register with a new value and checks if the new value is
1859 * different from the old value.
1860 *
1861 * Returns 1 for change else 0.
1862 */
1863int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1864 unsigned int mask, unsigned int value)
1865{
1866 int change;
1867 unsigned int old, new;
1868
1869 old = snd_soc_read(codec, reg);
1870 new = (old & ~mask) | value;
1871 change = old != new;
1872
1873 return change;
1874}
1875EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1876
1877/**
1878 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1879 * @substream: the pcm substream
1880 * @hw: the hardware parameters
1881 *
1882 * Sets the substream runtime hardware parameters.
1883 */
1884int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1885 const struct snd_pcm_hardware *hw)
1886{
1887 struct snd_pcm_runtime *runtime = substream->runtime;
1888 runtime->hw.info = hw->info;
1889 runtime->hw.formats = hw->formats;
1890 runtime->hw.period_bytes_min = hw->period_bytes_min;
1891 runtime->hw.period_bytes_max = hw->period_bytes_max;
1892 runtime->hw.periods_min = hw->periods_min;
1893 runtime->hw.periods_max = hw->periods_max;
1894 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1895 runtime->hw.fifo_size = hw->fifo_size;
1896 return 0;
1897}
1898EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1899
1900/**
1901 * snd_soc_cnew - create new control
1902 * @_template: control template
1903 * @data: control private data
1904 * @long_name: control long name
1905 * @prefix: control name prefix
1906 *
1907 * Create a new mixer control from a template control.
1908 *
1909 * Returns 0 for success, else error.
1910 */
1911struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1912 void *data, char *long_name,
1913 const char *prefix)
1914{
1915 struct snd_kcontrol_new template;
1916 struct snd_kcontrol *kcontrol;
1917 char *name = NULL;
1918 int name_len;
1919
1920 memcpy(&template, _template, sizeof(template));
1921 template.index = 0;
1922
1923 if (!long_name)
1924 long_name = template.name;
1925
1926 if (prefix) {
1927 name_len = strlen(long_name) + strlen(prefix) + 2;
1928 name = kmalloc(name_len, GFP_KERNEL);
1929 if (!name)
1930 return NULL;
1931
1932 snprintf(name, name_len, "%s %s", prefix, long_name);
1933
1934 template.name = name;
1935 } else {
1936 template.name = long_name;
1937 }
1938
1939 kcontrol = snd_ctl_new1(&template, data);
1940
1941 kfree(name);
1942
1943 return kcontrol;
1944}
1945EXPORT_SYMBOL_GPL(snd_soc_cnew);
1946
1947/**
1948 * snd_soc_add_controls - add an array of controls to a codec.
1949 * Convienience function to add a list of controls. Many codecs were
1950 * duplicating this code.
1951 *
1952 * @codec: codec to add controls to
1953 * @controls: array of controls to add
1954 * @num_controls: number of elements in the array
1955 *
1956 * Return 0 for success, else error.
1957 */
1958int snd_soc_add_controls(struct snd_soc_codec *codec,
1959 const struct snd_kcontrol_new *controls, int num_controls)
1960{
1961 struct snd_card *card = codec->card->snd_card;
1962 int err, i;
1963
1964 for (i = 0; i < num_controls; i++) {
1965 const struct snd_kcontrol_new *control = &controls[i];
1966 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
1967 control->name,
1968 codec->name_prefix));
1969 if (err < 0) {
1970 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
1971 codec->name, control->name, err);
1972 return err;
1973 }
1974 }
1975
1976 return 0;
1977}
1978EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1979
1980/**
1981 * snd_soc_add_platform_controls - add an array of controls to a platform.
1982 * Convienience function to add a list of controls.
1983 *
1984 * @platform: platform to add controls to
1985 * @controls: array of controls to add
1986 * @num_controls: number of elements in the array
1987 *
1988 * Return 0 for success, else error.
1989 */
1990int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1991 const struct snd_kcontrol_new *controls, int num_controls)
1992{
1993 struct snd_card *card = platform->card->snd_card;
1994 int err, i;
1995
1996 for (i = 0; i < num_controls; i++) {
1997 const struct snd_kcontrol_new *control = &controls[i];
1998 err = snd_ctl_add(card, snd_soc_cnew(control, platform,
1999 control->name, NULL));
2000 if (err < 0) {
2001 dev_err(platform->dev, "Failed to add %s %d\n",control->name, err);
2002 return err;
2003 }
2004 }
2005
2006 return 0;
2007}
2008EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2009
2010/**
2011 * snd_soc_info_enum_double - enumerated double mixer info callback
2012 * @kcontrol: mixer control
2013 * @uinfo: control element information
2014 *
2015 * Callback to provide information about a double enumerated
2016 * mixer control.
2017 *
2018 * Returns 0 for success.
2019 */
2020int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2021 struct snd_ctl_elem_info *uinfo)
2022{
2023 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2024
2025 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2026 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2027 uinfo->value.enumerated.items = e->max;
2028
2029 if (uinfo->value.enumerated.item > e->max - 1)
2030 uinfo->value.enumerated.item = e->max - 1;
2031 strcpy(uinfo->value.enumerated.name,
2032 e->texts[uinfo->value.enumerated.item]);
2033 return 0;
2034}
2035EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2036
2037/**
2038 * snd_soc_get_enum_double - enumerated double mixer get callback
2039 * @kcontrol: mixer control
2040 * @ucontrol: control element information
2041 *
2042 * Callback to get the value of a double enumerated mixer.
2043 *
2044 * Returns 0 for success.
2045 */
2046int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2047 struct snd_ctl_elem_value *ucontrol)
2048{
2049 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2050 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2051 unsigned int val, bitmask;
2052
2053 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2054 ;
2055 val = snd_soc_read(codec, e->reg);
2056 ucontrol->value.enumerated.item[0]
2057 = (val >> e->shift_l) & (bitmask - 1);
2058 if (e->shift_l != e->shift_r)
2059 ucontrol->value.enumerated.item[1] =
2060 (val >> e->shift_r) & (bitmask - 1);
2061
2062 return 0;
2063}
2064EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2065
2066/**
2067 * snd_soc_put_enum_double - enumerated double mixer put callback
2068 * @kcontrol: mixer control
2069 * @ucontrol: control element information
2070 *
2071 * Callback to set the value of a double enumerated mixer.
2072 *
2073 * Returns 0 for success.
2074 */
2075int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2076 struct snd_ctl_elem_value *ucontrol)
2077{
2078 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2079 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2080 unsigned int val;
2081 unsigned int mask, bitmask;
2082
2083 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2084 ;
2085 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2086 return -EINVAL;
2087 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2088 mask = (bitmask - 1) << e->shift_l;
2089 if (e->shift_l != e->shift_r) {
2090 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2091 return -EINVAL;
2092 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2093 mask |= (bitmask - 1) << e->shift_r;
2094 }
2095
2096 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2097}
2098EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2099
2100/**
2101 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2102 * @kcontrol: mixer control
2103 * @ucontrol: control element information
2104 *
2105 * Callback to get the value of a double semi enumerated mixer.
2106 *
2107 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2108 * used for handling bitfield coded enumeration for example.
2109 *
2110 * Returns 0 for success.
2111 */
2112int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2113 struct snd_ctl_elem_value *ucontrol)
2114{
2115 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2117 unsigned int reg_val, val, mux;
2118
2119 reg_val = snd_soc_read(codec, e->reg);
2120 val = (reg_val >> e->shift_l) & e->mask;
2121 for (mux = 0; mux < e->max; mux++) {
2122 if (val == e->values[mux])
2123 break;
2124 }
2125 ucontrol->value.enumerated.item[0] = mux;
2126 if (e->shift_l != e->shift_r) {
2127 val = (reg_val >> e->shift_r) & e->mask;
2128 for (mux = 0; mux < e->max; mux++) {
2129 if (val == e->values[mux])
2130 break;
2131 }
2132 ucontrol->value.enumerated.item[1] = mux;
2133 }
2134
2135 return 0;
2136}
2137EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2138
2139/**
2140 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2141 * @kcontrol: mixer control
2142 * @ucontrol: control element information
2143 *
2144 * Callback to set the value of a double semi enumerated mixer.
2145 *
2146 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2147 * used for handling bitfield coded enumeration for example.
2148 *
2149 * Returns 0 for success.
2150 */
2151int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2152 struct snd_ctl_elem_value *ucontrol)
2153{
2154 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2155 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2156 unsigned int val;
2157 unsigned int mask;
2158
2159 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2160 return -EINVAL;
2161 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2162 mask = e->mask << e->shift_l;
2163 if (e->shift_l != e->shift_r) {
2164 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2165 return -EINVAL;
2166 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2167 mask |= e->mask << e->shift_r;
2168 }
2169
2170 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2171}
2172EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2173
2174/**
2175 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2176 * @kcontrol: mixer control
2177 * @uinfo: control element information
2178 *
2179 * Callback to provide information about an external enumerated
2180 * single mixer.
2181 *
2182 * Returns 0 for success.
2183 */
2184int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2185 struct snd_ctl_elem_info *uinfo)
2186{
2187 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2188
2189 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2190 uinfo->count = 1;
2191 uinfo->value.enumerated.items = e->max;
2192
2193 if (uinfo->value.enumerated.item > e->max - 1)
2194 uinfo->value.enumerated.item = e->max - 1;
2195 strcpy(uinfo->value.enumerated.name,
2196 e->texts[uinfo->value.enumerated.item]);
2197 return 0;
2198}
2199EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2200
2201/**
2202 * snd_soc_info_volsw_ext - external single mixer info callback
2203 * @kcontrol: mixer control
2204 * @uinfo: control element information
2205 *
2206 * Callback to provide information about a single external mixer control.
2207 *
2208 * Returns 0 for success.
2209 */
2210int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2211 struct snd_ctl_elem_info *uinfo)
2212{
2213 int max = kcontrol->private_value;
2214
2215 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2216 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2217 else
2218 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2219
2220 uinfo->count = 1;
2221 uinfo->value.integer.min = 0;
2222 uinfo->value.integer.max = max;
2223 return 0;
2224}
2225EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2226
2227/**
2228 * snd_soc_info_volsw - single mixer info callback
2229 * @kcontrol: mixer control
2230 * @uinfo: control element information
2231 *
2232 * Callback to provide information about a single mixer control.
2233 *
2234 * Returns 0 for success.
2235 */
2236int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2237 struct snd_ctl_elem_info *uinfo)
2238{
2239 struct soc_mixer_control *mc =
2240 (struct soc_mixer_control *)kcontrol->private_value;
2241 int platform_max;
2242 unsigned int shift = mc->shift;
2243 unsigned int rshift = mc->rshift;
2244
2245 if (!mc->platform_max)
2246 mc->platform_max = mc->max;
2247 platform_max = mc->platform_max;
2248
2249 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2250 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2251 else
2252 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2253
2254 uinfo->count = shift == rshift ? 1 : 2;
2255 uinfo->value.integer.min = 0;
2256 uinfo->value.integer.max = platform_max;
2257 return 0;
2258}
2259EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2260
2261/**
2262 * snd_soc_get_volsw - single mixer get callback
2263 * @kcontrol: mixer control
2264 * @ucontrol: control element information
2265 *
2266 * Callback to get the value of a single mixer control.
2267 *
2268 * Returns 0 for success.
2269 */
2270int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2271 struct snd_ctl_elem_value *ucontrol)
2272{
2273 struct soc_mixer_control *mc =
2274 (struct soc_mixer_control *)kcontrol->private_value;
2275 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2276 unsigned int reg = mc->reg;
2277 unsigned int shift = mc->shift;
2278 unsigned int rshift = mc->rshift;
2279 int max = mc->max;
2280 unsigned int mask = (1 << fls(max)) - 1;
2281 unsigned int invert = mc->invert;
2282
2283 ucontrol->value.integer.value[0] =
2284 (snd_soc_read(codec, reg) >> shift) & mask;
2285 if (shift != rshift)
2286 ucontrol->value.integer.value[1] =
2287 (snd_soc_read(codec, reg) >> rshift) & mask;
2288 if (invert) {
2289 ucontrol->value.integer.value[0] =
2290 max - ucontrol->value.integer.value[0];
2291 if (shift != rshift)
2292 ucontrol->value.integer.value[1] =
2293 max - ucontrol->value.integer.value[1];
2294 }
2295
2296 return 0;
2297}
2298EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2299
2300/**
2301 * snd_soc_put_volsw - single mixer put callback
2302 * @kcontrol: mixer control
2303 * @ucontrol: control element information
2304 *
2305 * Callback to set the value of a single mixer control.
2306 *
2307 * Returns 0 for success.
2308 */
2309int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2310 struct snd_ctl_elem_value *ucontrol)
2311{
2312 struct soc_mixer_control *mc =
2313 (struct soc_mixer_control *)kcontrol->private_value;
2314 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2315 unsigned int reg = mc->reg;
2316 unsigned int shift = mc->shift;
2317 unsigned int rshift = mc->rshift;
2318 int max = mc->max;
2319 unsigned int mask = (1 << fls(max)) - 1;
2320 unsigned int invert = mc->invert;
2321 unsigned int val, val2, val_mask;
2322
2323 val = (ucontrol->value.integer.value[0] & mask);
2324 if (invert)
2325 val = max - val;
2326 val_mask = mask << shift;
2327 val = val << shift;
2328 if (shift != rshift) {
2329 val2 = (ucontrol->value.integer.value[1] & mask);
2330 if (invert)
2331 val2 = max - val2;
2332 val_mask |= mask << rshift;
2333 val |= val2 << rshift;
2334 }
2335 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2336}
2337EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2338
2339/**
2340 * snd_soc_info_volsw_2r - double mixer info callback
2341 * @kcontrol: mixer control
2342 * @uinfo: control element information
2343 *
2344 * Callback to provide information about a double mixer control that
2345 * spans 2 codec registers.
2346 *
2347 * Returns 0 for success.
2348 */
2349int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2350 struct snd_ctl_elem_info *uinfo)
2351{
2352 struct soc_mixer_control *mc =
2353 (struct soc_mixer_control *)kcontrol->private_value;
2354 int platform_max;
2355
2356 if (!mc->platform_max)
2357 mc->platform_max = mc->max;
2358 platform_max = mc->platform_max;
2359
2360 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2361 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2362 else
2363 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2364
2365 uinfo->count = 2;
2366 uinfo->value.integer.min = 0;
2367 uinfo->value.integer.max = platform_max;
2368 return 0;
2369}
2370EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2371
2372/**
2373 * snd_soc_get_volsw_2r - double mixer get callback
2374 * @kcontrol: mixer control
2375 * @ucontrol: control element information
2376 *
2377 * Callback to get the value of a double mixer control that spans 2 registers.
2378 *
2379 * Returns 0 for success.
2380 */
2381int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2382 struct snd_ctl_elem_value *ucontrol)
2383{
2384 struct soc_mixer_control *mc =
2385 (struct soc_mixer_control *)kcontrol->private_value;
2386 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2387 unsigned int reg = mc->reg;
2388 unsigned int reg2 = mc->rreg;
2389 unsigned int shift = mc->shift;
2390 int max = mc->max;
2391 unsigned int mask = (1 << fls(max)) - 1;
2392 unsigned int invert = mc->invert;
2393
2394 ucontrol->value.integer.value[0] =
2395 (snd_soc_read(codec, reg) >> shift) & mask;
2396 ucontrol->value.integer.value[1] =
2397 (snd_soc_read(codec, reg2) >> shift) & mask;
2398 if (invert) {
2399 ucontrol->value.integer.value[0] =
2400 max - ucontrol->value.integer.value[0];
2401 ucontrol->value.integer.value[1] =
2402 max - ucontrol->value.integer.value[1];
2403 }
2404
2405 return 0;
2406}
2407EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2408
2409/**
2410 * snd_soc_put_volsw_2r - double mixer set callback
2411 * @kcontrol: mixer control
2412 * @ucontrol: control element information
2413 *
2414 * Callback to set the value of a double mixer control that spans 2 registers.
2415 *
2416 * Returns 0 for success.
2417 */
2418int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2419 struct snd_ctl_elem_value *ucontrol)
2420{
2421 struct soc_mixer_control *mc =
2422 (struct soc_mixer_control *)kcontrol->private_value;
2423 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2424 unsigned int reg = mc->reg;
2425 unsigned int reg2 = mc->rreg;
2426 unsigned int shift = mc->shift;
2427 int max = mc->max;
2428 unsigned int mask = (1 << fls(max)) - 1;
2429 unsigned int invert = mc->invert;
2430 int err;
2431 unsigned int val, val2, val_mask;
2432
2433 val_mask = mask << shift;
2434 val = (ucontrol->value.integer.value[0] & mask);
2435 val2 = (ucontrol->value.integer.value[1] & mask);
2436
2437 if (invert) {
2438 val = max - val;
2439 val2 = max - val2;
2440 }
2441
2442 val = val << shift;
2443 val2 = val2 << shift;
2444
2445 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2446 if (err < 0)
2447 return err;
2448
2449 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2450 return err;
2451}
2452EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2453
2454/**
2455 * snd_soc_info_volsw_s8 - signed mixer info callback
2456 * @kcontrol: mixer control
2457 * @uinfo: control element information
2458 *
2459 * Callback to provide information about a signed mixer control.
2460 *
2461 * Returns 0 for success.
2462 */
2463int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2464 struct snd_ctl_elem_info *uinfo)
2465{
2466 struct soc_mixer_control *mc =
2467 (struct soc_mixer_control *)kcontrol->private_value;
2468 int platform_max;
2469 int min = mc->min;
2470
2471 if (!mc->platform_max)
2472 mc->platform_max = mc->max;
2473 platform_max = mc->platform_max;
2474
2475 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2476 uinfo->count = 2;
2477 uinfo->value.integer.min = 0;
2478 uinfo->value.integer.max = platform_max - min;
2479 return 0;
2480}
2481EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2482
2483/**
2484 * snd_soc_get_volsw_s8 - signed mixer get callback
2485 * @kcontrol: mixer control
2486 * @ucontrol: control element information
2487 *
2488 * Callback to get the value of a signed mixer control.
2489 *
2490 * Returns 0 for success.
2491 */
2492int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2493 struct snd_ctl_elem_value *ucontrol)
2494{
2495 struct soc_mixer_control *mc =
2496 (struct soc_mixer_control *)kcontrol->private_value;
2497 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2498 unsigned int reg = mc->reg;
2499 int min = mc->min;
2500 int val = snd_soc_read(codec, reg);
2501
2502 ucontrol->value.integer.value[0] =
2503 ((signed char)(val & 0xff))-min;
2504 ucontrol->value.integer.value[1] =
2505 ((signed char)((val >> 8) & 0xff))-min;
2506 return 0;
2507}
2508EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2509
2510/**
2511 * snd_soc_put_volsw_sgn - signed mixer put callback
2512 * @kcontrol: mixer control
2513 * @ucontrol: control element information
2514 *
2515 * Callback to set the value of a signed mixer control.
2516 *
2517 * Returns 0 for success.
2518 */
2519int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2520 struct snd_ctl_elem_value *ucontrol)
2521{
2522 struct soc_mixer_control *mc =
2523 (struct soc_mixer_control *)kcontrol->private_value;
2524 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2525 unsigned int reg = mc->reg;
2526 int min = mc->min;
2527 unsigned int val;
2528
2529 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2530 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2531
2532 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2533}
2534EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2535
2536/**
2537 * snd_soc_limit_volume - Set new limit to an existing volume control.
2538 *
2539 * @codec: where to look for the control
2540 * @name: Name of the control
2541 * @max: new maximum limit
2542 *
2543 * Return 0 for success, else error.
2544 */
2545int snd_soc_limit_volume(struct snd_soc_codec *codec,
2546 const char *name, int max)
2547{
2548 struct snd_card *card = codec->card->snd_card;
2549 struct snd_kcontrol *kctl;
2550 struct soc_mixer_control *mc;
2551 int found = 0;
2552 int ret = -EINVAL;
2553
2554 /* Sanity check for name and max */
2555 if (unlikely(!name || max <= 0))
2556 return -EINVAL;
2557
2558 list_for_each_entry(kctl, &card->controls, list) {
2559 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2560 found = 1;
2561 break;
2562 }
2563 }
2564 if (found) {
2565 mc = (struct soc_mixer_control *)kctl->private_value;
2566 if (max <= mc->max) {
2567 mc->platform_max = max;
2568 ret = 0;
2569 }
2570 }
2571 return ret;
2572}
2573EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2574
2575/**
2576 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2577 * mixer info callback
2578 * @kcontrol: mixer control
2579 * @uinfo: control element information
2580 *
2581 * Returns 0 for success.
2582 */
2583int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2584 struct snd_ctl_elem_info *uinfo)
2585{
2586 struct soc_mixer_control *mc =
2587 (struct soc_mixer_control *)kcontrol->private_value;
2588 int max = mc->max;
2589 int min = mc->min;
2590
2591 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2592 uinfo->count = 2;
2593 uinfo->value.integer.min = 0;
2594 uinfo->value.integer.max = max-min;
2595
2596 return 0;
2597}
2598EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2599
2600/**
2601 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2602 * mixer get callback
2603 * @kcontrol: mixer control
2604 * @uinfo: control element information
2605 *
2606 * Returns 0 for success.
2607 */
2608int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2609 struct snd_ctl_elem_value *ucontrol)
2610{
2611 struct soc_mixer_control *mc =
2612 (struct soc_mixer_control *)kcontrol->private_value;
2613 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2614 unsigned int mask = (1<<mc->shift)-1;
2615 int min = mc->min;
2616 int val = snd_soc_read(codec, mc->reg) & mask;
2617 int valr = snd_soc_read(codec, mc->rreg) & mask;
2618
2619 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2620 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2621 return 0;
2622}
2623EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2624
2625/**
2626 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2627 * mixer put callback
2628 * @kcontrol: mixer control
2629 * @uinfo: control element information
2630 *
2631 * Returns 0 for success.
2632 */
2633int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2634 struct snd_ctl_elem_value *ucontrol)
2635{
2636 struct soc_mixer_control *mc =
2637 (struct soc_mixer_control *)kcontrol->private_value;
2638 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2639 unsigned int mask = (1<<mc->shift)-1;
2640 int min = mc->min;
2641 int ret;
2642 unsigned int val, valr, oval, ovalr;
2643
2644 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2645 val &= mask;
2646 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2647 valr &= mask;
2648
2649 oval = snd_soc_read(codec, mc->reg) & mask;
2650 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2651
2652 ret = 0;
2653 if (oval != val) {
2654 ret = snd_soc_write(codec, mc->reg, val);
2655 if (ret < 0)
2656 return ret;
2657 }
2658 if (ovalr != valr) {
2659 ret = snd_soc_write(codec, mc->rreg, valr);
2660 if (ret < 0)
2661 return ret;
2662 }
2663
2664 return 0;
2665}
2666EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2667
2668/**
2669 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2670 * @dai: DAI
2671 * @clk_id: DAI specific clock ID
2672 * @freq: new clock frequency in Hz
2673 * @dir: new clock direction - input/output.
2674 *
2675 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2676 */
2677int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2678 unsigned int freq, int dir)
2679{
2680 if (dai->driver && dai->driver->ops->set_sysclk)
2681 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2682 else if (dai->codec && dai->codec->driver->set_sysclk)
2683 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
2684 freq, dir);
2685 else
2686 return -EINVAL;
2687}
2688EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2689
2690/**
2691 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2692 * @codec: CODEC
2693 * @clk_id: DAI specific clock ID
2694 * @freq: new clock frequency in Hz
2695 * @dir: new clock direction - input/output.
2696 *
2697 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2698 */
2699int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2700 unsigned int freq, int dir)
2701{
2702 if (codec->driver->set_sysclk)
2703 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
2704 else
2705 return -EINVAL;
2706}
2707EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2708
2709/**
2710 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2711 * @dai: DAI
2712 * @div_id: DAI specific clock divider ID
2713 * @div: new clock divisor.
2714 *
2715 * Configures the clock dividers. This is used to derive the best DAI bit and
2716 * frame clocks from the system or master clock. It's best to set the DAI bit
2717 * and frame clocks as low as possible to save system power.
2718 */
2719int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2720 int div_id, int div)
2721{
2722 if (dai->driver && dai->driver->ops->set_clkdiv)
2723 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2724 else
2725 return -EINVAL;
2726}
2727EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2728
2729/**
2730 * snd_soc_dai_set_pll - configure DAI PLL.
2731 * @dai: DAI
2732 * @pll_id: DAI specific PLL ID
2733 * @source: DAI specific source for the PLL
2734 * @freq_in: PLL input clock frequency in Hz
2735 * @freq_out: requested PLL output clock frequency in Hz
2736 *
2737 * Configures and enables PLL to generate output clock based on input clock.
2738 */
2739int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2740 unsigned int freq_in, unsigned int freq_out)
2741{
2742 if (dai->driver && dai->driver->ops->set_pll)
2743 return dai->driver->ops->set_pll(dai, pll_id, source,
2744 freq_in, freq_out);
2745 else if (dai->codec && dai->codec->driver->set_pll)
2746 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2747 freq_in, freq_out);
2748 else
2749 return -EINVAL;
2750}
2751EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2752
2753/*
2754 * snd_soc_codec_set_pll - configure codec PLL.
2755 * @codec: CODEC
2756 * @pll_id: DAI specific PLL ID
2757 * @source: DAI specific source for the PLL
2758 * @freq_in: PLL input clock frequency in Hz
2759 * @freq_out: requested PLL output clock frequency in Hz
2760 *
2761 * Configures and enables PLL to generate output clock based on input clock.
2762 */
2763int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2764 unsigned int freq_in, unsigned int freq_out)
2765{
2766 if (codec->driver->set_pll)
2767 return codec->driver->set_pll(codec, pll_id, source,
2768 freq_in, freq_out);
2769 else
2770 return -EINVAL;
2771}
2772EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2773
2774/**
2775 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2776 * @dai: DAI
2777 * @fmt: SND_SOC_DAIFMT_ format value.
2778 *
2779 * Configures the DAI hardware format and clocking.
2780 */
2781int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2782{
2783 if (dai->driver && dai->driver->ops->set_fmt)
2784 return dai->driver->ops->set_fmt(dai, fmt);
2785 else
2786 return -EINVAL;
2787}
2788EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2789
2790/**
2791 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2792 * @dai: DAI
2793 * @tx_mask: bitmask representing active TX slots.
2794 * @rx_mask: bitmask representing active RX slots.
2795 * @slots: Number of slots in use.
2796 * @slot_width: Width in bits for each slot.
2797 *
2798 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2799 * specific.
2800 */
2801int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2802 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2803{
2804 if (dai->driver && dai->driver->ops->set_tdm_slot)
2805 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2806 slots, slot_width);
2807 else
2808 return -EINVAL;
2809}
2810EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2811
2812/**
2813 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2814 * @dai: DAI
2815 * @tx_num: how many TX channels
2816 * @tx_slot: pointer to an array which imply the TX slot number channel
2817 * 0~num-1 uses
2818 * @rx_num: how many RX channels
2819 * @rx_slot: pointer to an array which imply the RX slot number channel
2820 * 0~num-1 uses
2821 *
2822 * configure the relationship between channel number and TDM slot number.
2823 */
2824int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2825 unsigned int tx_num, unsigned int *tx_slot,
2826 unsigned int rx_num, unsigned int *rx_slot)
2827{
2828 if (dai->driver && dai->driver->ops->set_channel_map)
2829 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2830 rx_num, rx_slot);
2831 else
2832 return -EINVAL;
2833}
2834EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2835
2836/**
2837 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2838 * @dai: DAI
2839 * @tristate: tristate enable
2840 *
2841 * Tristates the DAI so that others can use it.
2842 */
2843int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2844{
2845 if (dai->driver && dai->driver->ops->set_tristate)
2846 return dai->driver->ops->set_tristate(dai, tristate);
2847 else
2848 return -EINVAL;
2849}
2850EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2851
2852/**
2853 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2854 * @dai: DAI
2855 * @mute: mute enable
2856 *
2857 * Mutes the DAI DAC.
2858 */
2859int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2860{
2861 if (dai->driver && dai->driver->ops->digital_mute)
2862 return dai->driver->ops->digital_mute(dai, mute);
2863 else
2864 return -EINVAL;
2865}
2866EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2867
2868/**
2869 * snd_soc_register_card - Register a card with the ASoC core
2870 *
2871 * @card: Card to register
2872 *
2873 */
2874int snd_soc_register_card(struct snd_soc_card *card)
2875{
2876 int i;
2877
2878 if (!card->name || !card->dev)
2879 return -EINVAL;
2880
2881 dev_set_drvdata(card->dev, card);
2882
2883 snd_soc_initialize_card_lists(card);
2884
2885 soc_init_card_debugfs(card);
2886
2887 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
2888 (card->num_links + card->num_aux_devs),
2889 GFP_KERNEL);
2890 if (card->rtd == NULL)
2891 return -ENOMEM;
2892 card->rtd_aux = &card->rtd[card->num_links];
2893
2894 for (i = 0; i < card->num_links; i++)
2895 card->rtd[i].dai_link = &card->dai_link[i];
2896
2897 INIT_LIST_HEAD(&card->list);
2898 card->instantiated = 0;
2899 mutex_init(&card->mutex);
2900
2901 mutex_lock(&client_mutex);
2902 list_add(&card->list, &card_list);
2903 snd_soc_instantiate_cards();
2904 mutex_unlock(&client_mutex);
2905
2906 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2907
2908 return 0;
2909}
2910EXPORT_SYMBOL_GPL(snd_soc_register_card);
2911
2912/**
2913 * snd_soc_unregister_card - Unregister a card with the ASoC core
2914 *
2915 * @card: Card to unregister
2916 *
2917 */
2918int snd_soc_unregister_card(struct snd_soc_card *card)
2919{
2920 if (card->instantiated)
2921 soc_cleanup_card_resources(card);
2922 mutex_lock(&client_mutex);
2923 list_del(&card->list);
2924 mutex_unlock(&client_mutex);
2925 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2926
2927 return 0;
2928}
2929EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2930
2931/*
2932 * Simplify DAI link configuration by removing ".-1" from device names
2933 * and sanitizing names.
2934 */
2935static char *fmt_single_name(struct device *dev, int *id)
2936{
2937 char *found, name[NAME_SIZE];
2938 int id1, id2;
2939
2940 if (dev_name(dev) == NULL)
2941 return NULL;
2942
2943 strlcpy(name, dev_name(dev), NAME_SIZE);
2944
2945 /* are we a "%s.%d" name (platform and SPI components) */
2946 found = strstr(name, dev->driver->name);
2947 if (found) {
2948 /* get ID */
2949 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2950
2951 /* discard ID from name if ID == -1 */
2952 if (*id == -1)
2953 found[strlen(dev->driver->name)] = '\0';
2954 }
2955
2956 } else {
2957 /* I2C component devices are named "bus-addr" */
2958 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2959 char tmp[NAME_SIZE];
2960
2961 /* create unique ID number from I2C addr and bus */
2962 *id = ((id1 & 0xffff) << 16) + id2;
2963
2964 /* sanitize component name for DAI link creation */
2965 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2966 strlcpy(name, tmp, NAME_SIZE);
2967 } else
2968 *id = 0;
2969 }
2970
2971 return kstrdup(name, GFP_KERNEL);
2972}
2973
2974/*
2975 * Simplify DAI link naming for single devices with multiple DAIs by removing
2976 * any ".-1" and using the DAI name (instead of device name).
2977 */
2978static inline char *fmt_multiple_name(struct device *dev,
2979 struct snd_soc_dai_driver *dai_drv)
2980{
2981 if (dai_drv->name == NULL) {
2982 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
2983 dev_name(dev));
2984 return NULL;
2985 }
2986
2987 return kstrdup(dai_drv->name, GFP_KERNEL);
2988}
2989
2990/**
2991 * snd_soc_register_dai - Register a DAI with the ASoC core
2992 *
2993 * @dai: DAI to register
2994 */
2995int snd_soc_register_dai(struct device *dev,
2996 struct snd_soc_dai_driver *dai_drv)
2997{
2998 struct snd_soc_dai *dai;
2999
3000 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3001
3002 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3003 if (dai == NULL)
3004 return -ENOMEM;
3005
3006 /* create DAI component name */
3007 dai->name = fmt_single_name(dev, &dai->id);
3008 if (dai->name == NULL) {
3009 kfree(dai);
3010 return -ENOMEM;
3011 }
3012
3013 dai->dev = dev;
3014 dai->driver = dai_drv;
3015 if (!dai->driver->ops)
3016 dai->driver->ops = &null_dai_ops;
3017
3018 mutex_lock(&client_mutex);
3019 list_add(&dai->list, &dai_list);
3020 snd_soc_instantiate_cards();
3021 mutex_unlock(&client_mutex);
3022
3023 pr_debug("Registered DAI '%s'\n", dai->name);
3024
3025 return 0;
3026}
3027EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3028
3029/**
3030 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3031 *
3032 * @dai: DAI to unregister
3033 */
3034void snd_soc_unregister_dai(struct device *dev)
3035{
3036 struct snd_soc_dai *dai;
3037
3038 list_for_each_entry(dai, &dai_list, list) {
3039 if (dev == dai->dev)
3040 goto found;
3041 }
3042 return;
3043
3044found:
3045 mutex_lock(&client_mutex);
3046 list_del(&dai->list);
3047 mutex_unlock(&client_mutex);
3048
3049 pr_debug("Unregistered DAI '%s'\n", dai->name);
3050 kfree(dai->name);
3051 kfree(dai);
3052}
3053EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3054
3055/**
3056 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3057 *
3058 * @dai: Array of DAIs to register
3059 * @count: Number of DAIs
3060 */
3061int snd_soc_register_dais(struct device *dev,
3062 struct snd_soc_dai_driver *dai_drv, size_t count)
3063{
3064 struct snd_soc_dai *dai;
3065 int i, ret = 0;
3066
3067 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3068
3069 for (i = 0; i < count; i++) {
3070
3071 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3072 if (dai == NULL) {
3073 ret = -ENOMEM;
3074 goto err;
3075 }
3076
3077 /* create DAI component name */
3078 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3079 if (dai->name == NULL) {
3080 kfree(dai);
3081 ret = -EINVAL;
3082 goto err;
3083 }
3084
3085 dai->dev = dev;
3086 dai->driver = &dai_drv[i];
3087 if (dai->driver->id)
3088 dai->id = dai->driver->id;
3089 else
3090 dai->id = i;
3091 if (!dai->driver->ops)
3092 dai->driver->ops = &null_dai_ops;
3093
3094 mutex_lock(&client_mutex);
3095 list_add(&dai->list, &dai_list);
3096 mutex_unlock(&client_mutex);
3097
3098 pr_debug("Registered DAI '%s'\n", dai->name);
3099 }
3100
3101 mutex_lock(&client_mutex);
3102 snd_soc_instantiate_cards();
3103 mutex_unlock(&client_mutex);
3104 return 0;
3105
3106err:
3107 for (i--; i >= 0; i--)
3108 snd_soc_unregister_dai(dev);
3109
3110 return ret;
3111}
3112EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3113
3114/**
3115 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3116 *
3117 * @dai: Array of DAIs to unregister
3118 * @count: Number of DAIs
3119 */
3120void snd_soc_unregister_dais(struct device *dev, size_t count)
3121{
3122 int i;
3123
3124 for (i = 0; i < count; i++)
3125 snd_soc_unregister_dai(dev);
3126}
3127EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3128
3129/**
3130 * snd_soc_register_platform - Register a platform with the ASoC core
3131 *
3132 * @platform: platform to register
3133 */
3134int snd_soc_register_platform(struct device *dev,
3135 struct snd_soc_platform_driver *platform_drv)
3136{
3137 struct snd_soc_platform *platform;
3138
3139 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3140
3141 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3142 if (platform == NULL)
3143 return -ENOMEM;
3144
3145 /* create platform component name */
3146 platform->name = fmt_single_name(dev, &platform->id);
3147 if (platform->name == NULL) {
3148 kfree(platform);
3149 return -ENOMEM;
3150 }
3151
3152 platform->dev = dev;
3153 platform->driver = platform_drv;
3154 platform->dapm.dev = dev;
3155 platform->dapm.platform = platform;
3156
3157 mutex_lock(&client_mutex);
3158 list_add(&platform->list, &platform_list);
3159 snd_soc_instantiate_cards();
3160 mutex_unlock(&client_mutex);
3161
3162 pr_debug("Registered platform '%s'\n", platform->name);
3163
3164 return 0;
3165}
3166EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3167
3168/**
3169 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3170 *
3171 * @platform: platform to unregister
3172 */
3173void snd_soc_unregister_platform(struct device *dev)
3174{
3175 struct snd_soc_platform *platform;
3176
3177 list_for_each_entry(platform, &platform_list, list) {
3178 if (dev == platform->dev)
3179 goto found;
3180 }
3181 return;
3182
3183found:
3184 mutex_lock(&client_mutex);
3185 list_del(&platform->list);
3186 mutex_unlock(&client_mutex);
3187
3188 pr_debug("Unregistered platform '%s'\n", platform->name);
3189 kfree(platform->name);
3190 kfree(platform);
3191}
3192EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3193
3194static u64 codec_format_map[] = {
3195 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3196 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3197 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3198 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3199 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3200 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3201 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3202 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3203 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3204 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3205 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3206 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3207 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3208 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3209 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3210 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3211};
3212
3213/* Fix up the DAI formats for endianness: codecs don't actually see
3214 * the endianness of the data but we're using the CPU format
3215 * definitions which do need to include endianness so we ensure that
3216 * codec DAIs always have both big and little endian variants set.
3217 */
3218static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3219{
3220 int i;
3221
3222 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3223 if (stream->formats & codec_format_map[i])
3224 stream->formats |= codec_format_map[i];
3225}
3226
3227/**
3228 * snd_soc_register_codec - Register a codec with the ASoC core
3229 *
3230 * @codec: codec to register
3231 */
3232int snd_soc_register_codec(struct device *dev,
3233 const struct snd_soc_codec_driver *codec_drv,
3234 struct snd_soc_dai_driver *dai_drv,
3235 int num_dai)
3236{
3237 size_t reg_size;
3238 struct snd_soc_codec *codec;
3239 int ret, i;
3240
3241 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3242
3243 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3244 if (codec == NULL)
3245 return -ENOMEM;
3246
3247 /* create CODEC component name */
3248 codec->name = fmt_single_name(dev, &codec->id);
3249 if (codec->name == NULL) {
3250 kfree(codec);
3251 return -ENOMEM;
3252 }
3253
3254 if (codec_drv->compress_type)
3255 codec->compress_type = codec_drv->compress_type;
3256 else
3257 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3258
3259 codec->write = codec_drv->write;
3260 codec->read = codec_drv->read;
3261 codec->volatile_register = codec_drv->volatile_register;
3262 codec->readable_register = codec_drv->readable_register;
3263 codec->writable_register = codec_drv->writable_register;
3264 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3265 codec->dapm.dev = dev;
3266 codec->dapm.codec = codec;
3267 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3268 codec->dev = dev;
3269 codec->driver = codec_drv;
3270 codec->num_dai = num_dai;
3271 mutex_init(&codec->mutex);
3272
3273 /* allocate CODEC register cache */
3274 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3275 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3276 codec->reg_size = reg_size;
3277 /* it is necessary to make a copy of the default register cache
3278 * because in the case of using a compression type that requires
3279 * the default register cache to be marked as __devinitconst the
3280 * kernel might have freed the array by the time we initialize
3281 * the cache.
3282 */
3283 if (codec_drv->reg_cache_default) {
3284 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3285 reg_size, GFP_KERNEL);
3286 if (!codec->reg_def_copy) {
3287 ret = -ENOMEM;
3288 goto fail;
3289 }
3290 }
3291 }
3292
3293 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3294 if (!codec->volatile_register)
3295 codec->volatile_register = snd_soc_default_volatile_register;
3296 if (!codec->readable_register)
3297 codec->readable_register = snd_soc_default_readable_register;
3298 if (!codec->writable_register)
3299 codec->writable_register = snd_soc_default_writable_register;
3300 }
3301
3302 for (i = 0; i < num_dai; i++) {
3303 fixup_codec_formats(&dai_drv[i].playback);
3304 fixup_codec_formats(&dai_drv[i].capture);
3305 }
3306
3307 /* register any DAIs */
3308 if (num_dai) {
3309 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3310 if (ret < 0)
3311 goto fail;
3312 }
3313
3314 mutex_lock(&client_mutex);
3315 list_add(&codec->list, &codec_list);
3316 snd_soc_instantiate_cards();
3317 mutex_unlock(&client_mutex);
3318
3319 pr_debug("Registered codec '%s'\n", codec->name);
3320 return 0;
3321
3322fail:
3323 kfree(codec->reg_def_copy);
3324 codec->reg_def_copy = NULL;
3325 kfree(codec->name);
3326 kfree(codec);
3327 return ret;
3328}
3329EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3330
3331/**
3332 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3333 *
3334 * @codec: codec to unregister
3335 */
3336void snd_soc_unregister_codec(struct device *dev)
3337{
3338 struct snd_soc_codec *codec;
3339 int i;
3340
3341 list_for_each_entry(codec, &codec_list, list) {
3342 if (dev == codec->dev)
3343 goto found;
3344 }
3345 return;
3346
3347found:
3348 if (codec->num_dai)
3349 for (i = 0; i < codec->num_dai; i++)
3350 snd_soc_unregister_dai(dev);
3351
3352 mutex_lock(&client_mutex);
3353 list_del(&codec->list);
3354 mutex_unlock(&client_mutex);
3355
3356 pr_debug("Unregistered codec '%s'\n", codec->name);
3357
3358 snd_soc_cache_exit(codec);
3359 kfree(codec->reg_def_copy);
3360 kfree(codec->name);
3361 kfree(codec);
3362}
3363EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3364
3365static int __init snd_soc_init(void)
3366{
3367#ifdef CONFIG_DEBUG_FS
3368 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3369 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3370 printk(KERN_WARNING
3371 "ASoC: Failed to create debugfs directory\n");
3372 snd_soc_debugfs_root = NULL;
3373 }
3374
3375 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3376 &codec_list_fops))
3377 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3378
3379 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3380 &dai_list_fops))
3381 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3382
3383 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3384 &platform_list_fops))
3385 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3386#endif
3387
3388 snd_soc_util_init();
3389
3390 return platform_driver_register(&soc_driver);
3391}
3392module_init(snd_soc_init);
3393
3394static void __exit snd_soc_exit(void)
3395{
3396 snd_soc_util_exit();
3397
3398#ifdef CONFIG_DEBUG_FS
3399 debugfs_remove_recursive(snd_soc_debugfs_root);
3400#endif
3401 platform_driver_unregister(&soc_driver);
3402}
3403module_exit(snd_soc_exit);
3404
3405/* Module information */
3406MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3407MODULE_DESCRIPTION("ALSA SoC Core");
3408MODULE_LICENSE("GPL");
3409MODULE_ALIAS("platform:soc-audio");