Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/sound/soc/soc-core.c

  1 /*
  2  * soc-core.c  --  ALSA SoC Audio Layer
  3  *
  4  * Copyright 2005 Wolfson Microelectronics PLC.
  5  * Copyright 2005 Openedhand Ltd.
  6  * Copyright (C) 2010 Slimlogic Ltd.
  7  * Copyright (C) 2010 Texas Instruments Inc.
  8  *
  9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 10  *         with code, comments and ideas from :-
 11  *         Richard Purdie <richard@openedhand.com>
 12  *
 13  *  This program is free software; you can redistribute  it and/or modify it
 14  *  under  the terms of  the GNU General  Public License as published by the
 15  *  Free Software Foundation;  either version 2 of the  License, or (at your
 16  *  option) any later version.
 17  *
 18  *  TODO:
 19  *   o Add hw rules to enforce rates, etc.
 20  *   o More testing with other codecs/machines.
 21  *   o Add more codecs and platforms to ensure good API coverage.
 22  *   o Support TDM on PCM and I2S
 23  */
 24 
 25 #include <linux/module.h>
 26 #include <linux/moduleparam.h>
 27 #include <linux/init.h>
 28 #include <linux/delay.h>
 29 #include <linux/pm.h>
 30 #include <linux/bitops.h>
 31 #include <linux/debugfs.h>
 32 #include <linux/platform_device.h>
 33 #include <linux/pinctrl/consumer.h>
 34 #include <linux/ctype.h>
 35 #include <linux/slab.h>
 36 #include <linux/of.h>
 37 #include <sound/core.h>
 38 #include <sound/jack.h>
 39 #include <sound/pcm.h>
 40 #include <sound/pcm_params.h>
 41 #include <sound/soc.h>
 42 #include <sound/soc-dpcm.h>
 43 #include <sound/soc-topology.h>
 44 #include <sound/initval.h>
 45 
 46 #define CREATE_TRACE_POINTS
 47 #include <trace/events/asoc.h>
 48 
 49 #define NAME_SIZE       32
 50 
 51 #ifdef CONFIG_DEBUG_FS
 52 struct dentry *snd_soc_debugfs_root;
 53 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
 54 #endif
 55 
 56 static DEFINE_MUTEX(client_mutex);
 57 static LIST_HEAD(platform_list);
 58 static LIST_HEAD(codec_list);
 59 static LIST_HEAD(component_list);
 60 
 61 /*
 62  * This is a timeout to do a DAPM powerdown after a stream is closed().
 63  * It can be used to eliminate pops between different playback streams, e.g.
 64  * between two audio tracks.
 65  */
 66 static int pmdown_time = 5000;
 67 module_param(pmdown_time, int, 0);
 68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
 69 
 70 /* returns the minimum number of bytes needed to represent
 71  * a particular given value */
 72 static int min_bytes_needed(unsigned long val)
 73 {
 74         int c = 0;
 75         int i;
 76 
 77         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
 78                 if (val & (1UL << i))
 79                         break;
 80         c = (sizeof val * 8) - c;
 81         if (!c || (c % 8))
 82                 c = (c + 8) / 8;
 83         else
 84                 c /= 8;
 85         return c;
 86 }
 87 
 88 /* fill buf which is 'len' bytes with a formatted
 89  * string of the form 'reg: value\n' */
 90 static int format_register_str(struct snd_soc_codec *codec,
 91                                unsigned int reg, char *buf, size_t len)
 92 {
 93         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 94         int regsize = codec->driver->reg_word_size * 2;
 95         int ret;
 96 
 97         /* +2 for ': ' and + 1 for '\n' */
 98         if (wordsize + regsize + 2 + 1 != len)
 99                 return -EINVAL;
100 
101         sprintf(buf, "%.*x: ", wordsize, reg);
102         buf += wordsize + 2;
103 
104         ret = snd_soc_read(codec, reg);
105         if (ret < 0)
106                 memset(buf, 'X', regsize);
107         else
108                 sprintf(buf, "%.*x", regsize, ret);
109         buf[regsize] = '\n';
110         /* no NUL-termination needed */
111         return 0;
112 }
113 
114 /* codec register dump */
115 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
116                                   size_t count, loff_t pos)
117 {
118         int i, step = 1;
119         int wordsize, regsize;
120         int len;
121         size_t total = 0;
122         loff_t p = 0;
123 
124         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
125         regsize = codec->driver->reg_word_size * 2;
126 
127         len = wordsize + regsize + 2 + 1;
128 
129         if (!codec->driver->reg_cache_size)
130                 return 0;
131 
132         if (codec->driver->reg_cache_step)
133                 step = codec->driver->reg_cache_step;
134 
135         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
136                 /* only support larger than PAGE_SIZE bytes debugfs
137                  * entries for the default case */
138                 if (p >= pos) {
139                         if (total + len >= count - 1)
140                                 break;
141                         format_register_str(codec, i, buf + total, len);
142                         total += len;
143                 }
144                 p += len;
145         }
146 
147         total = min(total, count - 1);
148 
149         return total;
150 }
151 
152 static ssize_t codec_reg_show(struct device *dev,
153         struct device_attribute *attr, char *buf)
154 {
155         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
156 
157         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
158 }
159 
160 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
161 
162 static ssize_t pmdown_time_show(struct device *dev,
163                                 struct device_attribute *attr, char *buf)
164 {
165         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
166 
167         return sprintf(buf, "%ld\n", rtd->pmdown_time);
168 }
169 
170 static ssize_t pmdown_time_set(struct device *dev,
171                                struct device_attribute *attr,
172                                const char *buf, size_t count)
173 {
174         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
175         int ret;
176 
177         ret = kstrtol(buf, 10, &rtd->pmdown_time);
178         if (ret)
179                 return ret;
180 
181         return count;
182 }
183 
184 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
185 
186 static struct attribute *soc_dev_attrs[] = {
187         &dev_attr_codec_reg.attr,
188         &dev_attr_pmdown_time.attr,
189         NULL
190 };
191 
192 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
193                                        struct attribute *attr, int idx)
194 {
195         struct device *dev = kobj_to_dev(kobj);
196         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
197 
198         if (attr == &dev_attr_pmdown_time.attr)
199                 return attr->mode; /* always visible */
200         return rtd->codec ? attr->mode : 0; /* enabled only with codec */
201 }
202 
203 static const struct attribute_group soc_dapm_dev_group = {
204         .attrs = soc_dapm_dev_attrs,
205         .is_visible = soc_dev_attr_is_visible,
206 };
207 
208 static const struct attribute_group soc_dev_roup = {
209         .attrs = soc_dev_attrs,
210         .is_visible = soc_dev_attr_is_visible,
211 };
212 
213 static const struct attribute_group *soc_dev_attr_groups[] = {
214         &soc_dapm_dev_group,
215         &soc_dev_roup,
216         NULL
217 };
218 
219 #ifdef CONFIG_DEBUG_FS
220 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
221                                    size_t count, loff_t *ppos)
222 {
223         ssize_t ret;
224         struct snd_soc_codec *codec = file->private_data;
225         char *buf;
226 
227         if (*ppos < 0 || !count)
228                 return -EINVAL;
229 
230         buf = kmalloc(count, GFP_KERNEL);
231         if (!buf)
232                 return -ENOMEM;
233 
234         ret = soc_codec_reg_show(codec, buf, count, *ppos);
235         if (ret >= 0) {
236                 if (copy_to_user(user_buf, buf, ret)) {
237                         kfree(buf);
238                         return -EFAULT;
239                 }
240                 *ppos += ret;
241         }
242 
243         kfree(buf);
244         return ret;
245 }
246 
247 static ssize_t codec_reg_write_file(struct file *file,
248                 const char __user *user_buf, size_t count, loff_t *ppos)
249 {
250         char buf[32];
251         size_t buf_size;
252         char *start = buf;
253         unsigned long reg, value;
254         struct snd_soc_codec *codec = file->private_data;
255         int ret;
256 
257         buf_size = min(count, (sizeof(buf)-1));
258         if (copy_from_user(buf, user_buf, buf_size))
259                 return -EFAULT;
260         buf[buf_size] = 0;
261 
262         while (*start == ' ')
263                 start++;
264         reg = simple_strtoul(start, &start, 16);
265         while (*start == ' ')
266                 start++;
267         ret = kstrtoul(start, 16, &value);
268         if (ret)
269                 return ret;
270 
271         /* Userspace has been fiddling around behind the kernel's back */
272         add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
273 
274         snd_soc_write(codec, reg, value);
275         return buf_size;
276 }
277 
278 static const struct file_operations codec_reg_fops = {
279         .open = simple_open,
280         .read = codec_reg_read_file,
281         .write = codec_reg_write_file,
282         .llseek = default_llseek,
283 };
284 
285 static void soc_init_component_debugfs(struct snd_soc_component *component)
286 {
287         if (!component->card->debugfs_card_root)
288                 return;
289 
290         if (component->debugfs_prefix) {
291                 char *name;
292 
293                 name = kasprintf(GFP_KERNEL, "%s:%s",
294                         component->debugfs_prefix, component->name);
295                 if (name) {
296                         component->debugfs_root = debugfs_create_dir(name,
297                                 component->card->debugfs_card_root);
298                         kfree(name);
299                 }
300         } else {
301                 component->debugfs_root = debugfs_create_dir(component->name,
302                                 component->card->debugfs_card_root);
303         }
304 
305         if (!component->debugfs_root) {
306                 dev_warn(component->dev,
307                         "ASoC: Failed to create component debugfs directory\n");
308                 return;
309         }
310 
311         snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
312                 component->debugfs_root);
313 
314         if (component->init_debugfs)
315                 component->init_debugfs(component);
316 }
317 
318 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
319 {
320         debugfs_remove_recursive(component->debugfs_root);
321 }
322 
323 static void soc_init_codec_debugfs(struct snd_soc_component *component)
324 {
325         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
326 
327         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
328                                                  codec->component.debugfs_root,
329                                                  codec, &codec_reg_fops);
330         if (!codec->debugfs_reg)
331                 dev_warn(codec->dev,
332                         "ASoC: Failed to create codec register debugfs file\n");
333 }
334 
335 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
336                                     size_t count, loff_t *ppos)
337 {
338         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
339         ssize_t len, ret = 0;
340         struct snd_soc_codec *codec;
341 
342         if (!buf)
343                 return -ENOMEM;
344 
345         mutex_lock(&client_mutex);
346 
347         list_for_each_entry(codec, &codec_list, list) {
348                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
349                                codec->component.name);
350                 if (len >= 0)
351                         ret += len;
352                 if (ret > PAGE_SIZE) {
353                         ret = PAGE_SIZE;
354                         break;
355                 }
356         }
357 
358         mutex_unlock(&client_mutex);
359 
360         if (ret >= 0)
361                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
362 
363         kfree(buf);
364 
365         return ret;
366 }
367 
368 static const struct file_operations codec_list_fops = {
369         .read = codec_list_read_file,
370         .llseek = default_llseek,/* read accesses f_pos */
371 };
372 
373 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
374                                   size_t count, loff_t *ppos)
375 {
376         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
377         ssize_t len, ret = 0;
378         struct snd_soc_component *component;
379         struct snd_soc_dai *dai;
380 
381         if (!buf)
382                 return -ENOMEM;
383 
384         mutex_lock(&client_mutex);
385 
386         list_for_each_entry(component, &component_list, list) {
387                 list_for_each_entry(dai, &component->dai_list, list) {
388                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
389                                 dai->name);
390                         if (len >= 0)
391                                 ret += len;
392                         if (ret > PAGE_SIZE) {
393                                 ret = PAGE_SIZE;
394                                 break;
395                         }
396                 }
397         }
398 
399         mutex_unlock(&client_mutex);
400 
401         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402 
403         kfree(buf);
404 
405         return ret;
406 }
407 
408 static const struct file_operations dai_list_fops = {
409         .read = dai_list_read_file,
410         .llseek = default_llseek,/* read accesses f_pos */
411 };
412 
413 static ssize_t platform_list_read_file(struct file *file,
414                                        char __user *user_buf,
415                                        size_t count, loff_t *ppos)
416 {
417         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
418         ssize_t len, ret = 0;
419         struct snd_soc_platform *platform;
420 
421         if (!buf)
422                 return -ENOMEM;
423 
424         mutex_lock(&client_mutex);
425 
426         list_for_each_entry(platform, &platform_list, list) {
427                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
428                                platform->component.name);
429                 if (len >= 0)
430                         ret += len;
431                 if (ret > PAGE_SIZE) {
432                         ret = PAGE_SIZE;
433                         break;
434                 }
435         }
436 
437         mutex_unlock(&client_mutex);
438 
439         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
440 
441         kfree(buf);
442 
443         return ret;
444 }
445 
446 static const struct file_operations platform_list_fops = {
447         .read = platform_list_read_file,
448         .llseek = default_llseek,/* read accesses f_pos */
449 };
450 
451 static void soc_init_card_debugfs(struct snd_soc_card *card)
452 {
453         if (!snd_soc_debugfs_root)
454                 return;
455 
456         card->debugfs_card_root = debugfs_create_dir(card->name,
457                                                      snd_soc_debugfs_root);
458         if (!card->debugfs_card_root) {
459                 dev_warn(card->dev,
460                          "ASoC: Failed to create card debugfs directory\n");
461                 return;
462         }
463 
464         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
465                                                     card->debugfs_card_root,
466                                                     &card->pop_time);
467         if (!card->debugfs_pop_time)
468                 dev_warn(card->dev,
469                        "ASoC: Failed to create pop time debugfs file\n");
470 }
471 
472 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
473 {
474         debugfs_remove_recursive(card->debugfs_card_root);
475 }
476 
477 
478 static void snd_soc_debugfs_init(void)
479 {
480         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
481         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
482                 pr_warn("ASoC: Failed to create debugfs directory\n");
483                 snd_soc_debugfs_root = NULL;
484                 return;
485         }
486 
487         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
488                                  &codec_list_fops))
489                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
490 
491         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
492                                  &dai_list_fops))
493                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
494 
495         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
496                                  &platform_list_fops))
497                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
498 }
499 
500 static void snd_soc_debugfs_exit(void)
501 {
502         debugfs_remove_recursive(snd_soc_debugfs_root);
503 }
504 
505 #else
506 
507 #define soc_init_codec_debugfs NULL
508 
509 static inline void soc_init_component_debugfs(
510         struct snd_soc_component *component)
511 {
512 }
513 
514 static inline void soc_cleanup_component_debugfs(
515         struct snd_soc_component *component)
516 {
517 }
518 
519 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
520 {
521 }
522 
523 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
524 {
525 }
526 
527 static inline void snd_soc_debugfs_init(void)
528 {
529 }
530 
531 static inline void snd_soc_debugfs_exit(void)
532 {
533 }
534 
535 #endif
536 
537 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
538                 const char *dai_link, int stream)
539 {
540         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 }
550 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
551 
552 static 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 
574 static 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 
581 static 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 
589 static 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 
601 struct 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 }
613 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
614 
615 static 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 */
626 int 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 }
761 EXPORT_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  */
766 static 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 */
858 int 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 }
905 EXPORT_SYMBOL_GPL(snd_soc_resume);
906 #else
907 #define snd_soc_suspend NULL
908 #define snd_soc_resume NULL
909 #endif
910 
911 static const struct snd_soc_dai_ops null_dai_ops = {
912 };
913 
914 static 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  */
944 struct 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 }
973 EXPORT_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  */
991 struct 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 }
1015 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1016 
1017 static 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 
1030 static 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 
1116 static 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 
1133 static 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 
1150 static 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 
1168 static 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 
1194 static 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 
1222 static 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 
1249 static 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  */
1327 int 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 }
1349 EXPORT_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  */
1361 void 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 }
1388 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1389 
1390 static 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 
1409 static 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 
1494 err_probe:
1495         soc_cleanup_component_debugfs(component);
1496         component->card = NULL;
1497         module_put(component->dev->driver->owner);
1498 
1499         return ret;
1500 }
1501 
1502 static void rtd_release(struct device *dev)
1503 {
1504         kfree(dev);
1505 }
1506 
1507 static 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 
1539 static 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 
1575 static 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 
1596 static 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 
1638 static 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 
1721 static 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 
1755 err_defer:
1756         dev_err(card->dev, "ASoC: %s not registered\n", name);
1757         return -EPROBE_DEFER;
1758 }
1759 
1760 static 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 
1786 static 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 
1807 static 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  */
1838 int 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 }
1889 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1890 
1891 static 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 
2075 probe_aux_dev_err:
2076         soc_remove_aux_devices(card);
2077 
2078 probe_dai_err:
2079         soc_remove_dai_links(card);
2080 
2081 card_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 
2089 base_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 */
2098 static 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 
2119 static 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 */
2147 static 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 
2155 int 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 }
2184 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2185 
2186 const 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 };
2194 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2195 
2196 /* ASoC platform driver */
2197 static 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  */
2217 struct 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 }
2247 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2248 
2249 static 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 
2269 struct 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 }
2283 EXPORT_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  */
2294 int 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 }
2302 EXPORT_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  */
2315 int 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 }
2321 EXPORT_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  */
2333 int 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 }
2339 EXPORT_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  */
2351 int 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 }
2359 EXPORT_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  */
2371 int 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 }
2379 EXPORT_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  */
2390 int 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 }
2401 EXPORT_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  */
2413 int 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 }
2422 EXPORT_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  */
2434 int 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 }
2442 EXPORT_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  */
2454 int 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 }
2466 EXPORT_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  */
2478 int 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 }
2487 EXPORT_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  */
2496 int 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 }
2503 EXPORT_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  */
2512 int 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 }
2520 EXPORT_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  */
2530 static 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  */
2569 int 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 }
2587 EXPORT_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  */
2601 int 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 }
2611 EXPORT_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  */
2620 int 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 }
2627 EXPORT_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  */
2637 int 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 }
2651 EXPORT_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  */
2659 int 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 }
2715 EXPORT_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  */
2723 int 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 }
2734 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2735 
2736 /*
2737  * Simplify DAI link configuration by removing ".-1" from device names
2738  * and sanitizing names.
2739  */
2740 static 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  */
2783 static 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  */
2801 static 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 */
2815 static 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  */
2873 static 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 
2898 err:
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  */
2914 int 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 }
2944 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2945 
2946 static 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 
2954 static 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 
2962 static 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 
3003 static 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  */
3024 void 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 }
3030 EXPORT_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  */
3042 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3043 {
3044         regmap_exit(component->regmap);
3045         component->regmap = NULL;
3046 }
3047 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3048 
3049 #endif
3050 
3051 static 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 
3064 static 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 
3071 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3072 {
3073         snd_soc_unregister_dais(component);
3074         kfree(component->name);
3075 }
3076 
3077 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3078 {
3079         list_del(&component->list);
3080 }
3081 
3082 int 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 
3113 err_cleanup:
3114         snd_soc_component_cleanup(cmpnt);
3115 err_free:
3116         kfree(cmpnt);
3117         return ret;
3118 }
3119 EXPORT_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  */
3126 void 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 
3138 found:
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 }
3145 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3146 
3147 static 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 
3154 static 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  */
3167 int 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 }
3199 EXPORT_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  */
3207 int 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 }
3225 EXPORT_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  */
3231 void 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 }
3244 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3245 
3246 struct 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 }
3261 EXPORT_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  */
3268 void 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 }
3279 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3280 
3281 static 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  */
3305 static 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 
3314 static 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 
3321 static 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 
3328 static 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 
3335 static 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 
3342 static 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 
3350 static 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 
3360 static 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  */
3376 int 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 
3455 err_cleanup:
3456         snd_soc_component_cleanup(&codec->component);
3457 err_free:
3458         kfree(codec);
3459         return ret;
3460 }
3461 EXPORT_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  */
3468 void 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 
3480 found:
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 }
3492 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3493 
3494 /* Retrieve a card's name from device tree */
3495 int 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 }
3524 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name_from_node);
3525 
3526 static 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 
3533 int 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 }
3614 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets_from_node);
3615 
3616 static 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 
3634 int 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 }
3668 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3669 
3670 void 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 }
3691 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix_from_node);
3692 
3693 int 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 }
3750 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing_from_node);
3751 
3752 unsigned 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 }
3863 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3864 
3865 int 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 }
3917 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3918 
3919 int 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 }
3936 EXPORT_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  */
3951 int 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;
3994 err:
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 }
4007 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4008 
4009 static 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 }
4016 module_init(snd_soc_init);
4017 
4018 static 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 }
4027 module_exit(snd_soc_exit);
4028 
4029 /* Module information */
4030 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4031 MODULE_DESCRIPTION("ALSA SoC Core");
4032 MODULE_LICENSE("GPL");
4033 MODULE_ALIAS("platform:soc-audio");
4034 

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