Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

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         int i;
541 
542         for (i = 0; i < card->num_links; i++) {
543                 if (card->rtd[i].dai_link->no_pcm &&
544                         !strcmp(card->rtd[i].dai_link->name, dai_link))
545                         return card->rtd[i].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 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
553                 const char *dai_link)
554 {
555         int i;
556 
557         for (i = 0; i < card->num_links; i++) {
558                 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
559                         return &card->rtd[i];
560         }
561         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
562         return NULL;
563 }
564 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
565 
566 static void codec2codec_close_delayed_work(struct work_struct *work)
567 {
568         /* Currently nothing to do for c2c links
569          * Since c2c links are internal nodes in the DAPM graph and
570          * don't interface with the outside world or application layer
571          * we don't have to do any special handling on close.
572          */
573 }
574 
575 #ifdef CONFIG_PM_SLEEP
576 /* powers down audio subsystem for suspend */
577 int snd_soc_suspend(struct device *dev)
578 {
579         struct snd_soc_card *card = dev_get_drvdata(dev);
580         struct snd_soc_codec *codec;
581         int i, j;
582 
583         /* If the card is not initialized yet there is nothing to do */
584         if (!card->instantiated)
585                 return 0;
586 
587         /* Due to the resume being scheduled into a workqueue we could
588         * suspend before that's finished - wait for it to complete.
589          */
590         snd_power_lock(card->snd_card);
591         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
592         snd_power_unlock(card->snd_card);
593 
594         /* we're going to block userspace touching us until resume completes */
595         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
596 
597         /* mute any active DACs */
598         for (i = 0; i < card->num_rtd; i++) {
599 
600                 if (card->rtd[i].dai_link->ignore_suspend)
601                         continue;
602 
603                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
604                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
605                         struct snd_soc_dai_driver *drv = dai->driver;
606 
607                         if (drv->ops->digital_mute && dai->playback_active)
608                                 drv->ops->digital_mute(dai, 1);
609                 }
610         }
611 
612         /* suspend all pcms */
613         for (i = 0; i < card->num_rtd; i++) {
614                 if (card->rtd[i].dai_link->ignore_suspend)
615                         continue;
616 
617                 snd_pcm_suspend_all(card->rtd[i].pcm);
618         }
619 
620         if (card->suspend_pre)
621                 card->suspend_pre(card);
622 
623         for (i = 0; i < card->num_rtd; i++) {
624                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
625 
626                 if (card->rtd[i].dai_link->ignore_suspend)
627                         continue;
628 
629                 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
630                         cpu_dai->driver->suspend(cpu_dai);
631         }
632 
633         /* close any waiting streams */
634         for (i = 0; i < card->num_rtd; i++)
635                 flush_delayed_work(&card->rtd[i].delayed_work);
636 
637         for (i = 0; i < card->num_rtd; i++) {
638 
639                 if (card->rtd[i].dai_link->ignore_suspend)
640                         continue;
641 
642                 snd_soc_dapm_stream_event(&card->rtd[i],
643                                           SNDRV_PCM_STREAM_PLAYBACK,
644                                           SND_SOC_DAPM_STREAM_SUSPEND);
645 
646                 snd_soc_dapm_stream_event(&card->rtd[i],
647                                           SNDRV_PCM_STREAM_CAPTURE,
648                                           SND_SOC_DAPM_STREAM_SUSPEND);
649         }
650 
651         /* Recheck all endpoints too, their state is affected by suspend */
652         dapm_mark_endpoints_dirty(card);
653         snd_soc_dapm_sync(&card->dapm);
654 
655         /* suspend all CODECs */
656         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
657                 struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
658 
659                 /* If there are paths active then the CODEC will be held with
660                  * bias _ON and should not be suspended. */
661                 if (!codec->suspended) {
662                         switch (snd_soc_dapm_get_bias_level(dapm)) {
663                         case SND_SOC_BIAS_STANDBY:
664                                 /*
665                                  * If the CODEC is capable of idle
666                                  * bias off then being in STANDBY
667                                  * means it's doing something,
668                                  * otherwise fall through.
669                                  */
670                                 if (dapm->idle_bias_off) {
671                                         dev_dbg(codec->dev,
672                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
673                                         break;
674                                 }
675 
676                         case SND_SOC_BIAS_OFF:
677                                 if (codec->driver->suspend)
678                                         codec->driver->suspend(codec);
679                                 codec->suspended = 1;
680                                 if (codec->component.regmap)
681                                         regcache_mark_dirty(codec->component.regmap);
682                                 /* deactivate pins to sleep state */
683                                 pinctrl_pm_select_sleep_state(codec->dev);
684                                 break;
685                         default:
686                                 dev_dbg(codec->dev,
687                                         "ASoC: CODEC is on over suspend\n");
688                                 break;
689                         }
690                 }
691         }
692 
693         for (i = 0; i < card->num_rtd; i++) {
694                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
695 
696                 if (card->rtd[i].dai_link->ignore_suspend)
697                         continue;
698 
699                 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
700                         cpu_dai->driver->suspend(cpu_dai);
701 
702                 /* deactivate pins to sleep state */
703                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
704         }
705 
706         if (card->suspend_post)
707                 card->suspend_post(card);
708 
709         return 0;
710 }
711 EXPORT_SYMBOL_GPL(snd_soc_suspend);
712 
713 /* deferred resume work, so resume can complete before we finished
714  * setting our codec back up, which can be very slow on I2C
715  */
716 static void soc_resume_deferred(struct work_struct *work)
717 {
718         struct snd_soc_card *card =
719                         container_of(work, struct snd_soc_card, deferred_resume_work);
720         struct snd_soc_codec *codec;
721         int i, j;
722 
723         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
724          * so userspace apps are blocked from touching us
725          */
726 
727         dev_dbg(card->dev, "ASoC: starting resume work\n");
728 
729         /* Bring us up into D2 so that DAPM starts enabling things */
730         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
731 
732         if (card->resume_pre)
733                 card->resume_pre(card);
734 
735         /* resume control bus DAIs */
736         for (i = 0; i < card->num_rtd; i++) {
737                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
738 
739                 if (card->rtd[i].dai_link->ignore_suspend)
740                         continue;
741 
742                 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
743                         cpu_dai->driver->resume(cpu_dai);
744         }
745 
746         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
747                 if (codec->suspended) {
748                         if (codec->driver->resume)
749                                 codec->driver->resume(codec);
750                         codec->suspended = 0;
751                 }
752         }
753 
754         for (i = 0; i < card->num_rtd; i++) {
755 
756                 if (card->rtd[i].dai_link->ignore_suspend)
757                         continue;
758 
759                 snd_soc_dapm_stream_event(&card->rtd[i],
760                                           SNDRV_PCM_STREAM_PLAYBACK,
761                                           SND_SOC_DAPM_STREAM_RESUME);
762 
763                 snd_soc_dapm_stream_event(&card->rtd[i],
764                                           SNDRV_PCM_STREAM_CAPTURE,
765                                           SND_SOC_DAPM_STREAM_RESUME);
766         }
767 
768         /* unmute any active DACs */
769         for (i = 0; i < card->num_rtd; i++) {
770 
771                 if (card->rtd[i].dai_link->ignore_suspend)
772                         continue;
773 
774                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
775                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
776                         struct snd_soc_dai_driver *drv = dai->driver;
777 
778                         if (drv->ops->digital_mute && dai->playback_active)
779                                 drv->ops->digital_mute(dai, 0);
780                 }
781         }
782 
783         for (i = 0; i < card->num_rtd; i++) {
784                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
785 
786                 if (card->rtd[i].dai_link->ignore_suspend)
787                         continue;
788 
789                 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
790                         cpu_dai->driver->resume(cpu_dai);
791         }
792 
793         if (card->resume_post)
794                 card->resume_post(card);
795 
796         dev_dbg(card->dev, "ASoC: resume work completed\n");
797 
798         /* Recheck all endpoints too, their state is affected by suspend */
799         dapm_mark_endpoints_dirty(card);
800         snd_soc_dapm_sync(&card->dapm);
801 
802         /* userspace can access us now we are back as we were before */
803         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
804 }
805 
806 /* powers up audio subsystem after a suspend */
807 int snd_soc_resume(struct device *dev)
808 {
809         struct snd_soc_card *card = dev_get_drvdata(dev);
810         bool bus_control = false;
811         int i;
812 
813         /* If the card is not initialized yet there is nothing to do */
814         if (!card->instantiated)
815                 return 0;
816 
817         /* activate pins from sleep state */
818         for (i = 0; i < card->num_rtd; i++) {
819                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
820                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
821                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
822                 int j;
823 
824                 if (cpu_dai->active)
825                         pinctrl_pm_select_default_state(cpu_dai->dev);
826 
827                 for (j = 0; j < rtd->num_codecs; j++) {
828                         struct snd_soc_dai *codec_dai = codec_dais[j];
829                         if (codec_dai->active)
830                                 pinctrl_pm_select_default_state(codec_dai->dev);
831                 }
832         }
833 
834         /*
835          * DAIs that also act as the control bus master might have other drivers
836          * hanging off them so need to resume immediately. Other drivers don't
837          * have that problem and may take a substantial amount of time to resume
838          * due to I/O costs and anti-pop so handle them out of line.
839          */
840         for (i = 0; i < card->num_rtd; i++) {
841                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
842                 bus_control |= cpu_dai->driver->bus_control;
843         }
844         if (bus_control) {
845                 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
846                 soc_resume_deferred(&card->deferred_resume_work);
847         } else {
848                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
849                 if (!schedule_work(&card->deferred_resume_work))
850                         dev_err(dev, "ASoC: resume work item may be lost\n");
851         }
852 
853         return 0;
854 }
855 EXPORT_SYMBOL_GPL(snd_soc_resume);
856 #else
857 #define snd_soc_suspend NULL
858 #define snd_soc_resume NULL
859 #endif
860 
861 static const struct snd_soc_dai_ops null_dai_ops = {
862 };
863 
864 static struct snd_soc_component *soc_find_component(
865         const struct device_node *of_node, const char *name)
866 {
867         struct snd_soc_component *component;
868 
869         lockdep_assert_held(&client_mutex);
870 
871         list_for_each_entry(component, &component_list, list) {
872                 if (of_node) {
873                         if (component->dev->of_node == of_node)
874                                 return component;
875                 } else if (strcmp(component->name, name) == 0) {
876                         return component;
877                 }
878         }
879 
880         return NULL;
881 }
882 
883 static struct snd_soc_dai *snd_soc_find_dai(
884         const struct snd_soc_dai_link_component *dlc)
885 {
886         struct snd_soc_component *component;
887         struct snd_soc_dai *dai;
888         struct device_node *component_of_node;
889 
890         lockdep_assert_held(&client_mutex);
891 
892         /* Find CPU DAI from registered DAIs*/
893         list_for_each_entry(component, &component_list, list) {
894                 component_of_node = component->dev->of_node;
895                 if (!component_of_node && component->dev->parent)
896                         component_of_node = component->dev->parent->of_node;
897 
898                 if (dlc->of_node && component_of_node != dlc->of_node)
899                         continue;
900                 if (dlc->name && strcmp(component->name, dlc->name))
901                         continue;
902                 list_for_each_entry(dai, &component->dai_list, list) {
903                         if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
904                                 continue;
905 
906                         return dai;
907                 }
908         }
909 
910         return NULL;
911 }
912 
913 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
914 {
915         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
916         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
917         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
918         struct snd_soc_dai_link_component cpu_dai_component;
919         struct snd_soc_dai **codec_dais = rtd->codec_dais;
920         struct snd_soc_platform *platform;
921         const char *platform_name;
922         int i;
923 
924         dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
925 
926         cpu_dai_component.name = dai_link->cpu_name;
927         cpu_dai_component.of_node = dai_link->cpu_of_node;
928         cpu_dai_component.dai_name = dai_link->cpu_dai_name;
929         rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
930         if (!rtd->cpu_dai) {
931                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
932                         dai_link->cpu_dai_name);
933                 return -EPROBE_DEFER;
934         }
935 
936         rtd->num_codecs = dai_link->num_codecs;
937 
938         /* Find CODEC from registered CODECs */
939         for (i = 0; i < rtd->num_codecs; i++) {
940                 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
941                 if (!codec_dais[i]) {
942                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
943                                 codecs[i].dai_name);
944                         return -EPROBE_DEFER;
945                 }
946         }
947 
948         /* Single codec links expect codec and codec_dai in runtime data */
949         rtd->codec_dai = codec_dais[0];
950         rtd->codec = rtd->codec_dai->codec;
951 
952         /* if there's no platform we match on the empty platform */
953         platform_name = dai_link->platform_name;
954         if (!platform_name && !dai_link->platform_of_node)
955                 platform_name = "snd-soc-dummy";
956 
957         /* find one from the set of registered platforms */
958         list_for_each_entry(platform, &platform_list, list) {
959                 if (dai_link->platform_of_node) {
960                         if (platform->dev->of_node !=
961                             dai_link->platform_of_node)
962                                 continue;
963                 } else {
964                         if (strcmp(platform->component.name, platform_name))
965                                 continue;
966                 }
967 
968                 rtd->platform = platform;
969         }
970         if (!rtd->platform) {
971                 dev_err(card->dev, "ASoC: platform %s not registered\n",
972                         dai_link->platform_name);
973                 return -EPROBE_DEFER;
974         }
975 
976         card->num_rtd++;
977 
978         return 0;
979 }
980 
981 static void soc_remove_component(struct snd_soc_component *component)
982 {
983         if (!component->card)
984                 return;
985 
986         /* This is a HACK and will be removed soon */
987         if (component->codec)
988                 list_del(&component->codec->card_list);
989 
990         if (component->remove)
991                 component->remove(component);
992 
993         snd_soc_dapm_free(snd_soc_component_get_dapm(component));
994 
995         soc_cleanup_component_debugfs(component);
996         component->card = NULL;
997         module_put(component->dev->driver->owner);
998 }
999 
1000 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1001 {
1002         int err;
1003 
1004         if (dai && dai->probed &&
1005                         dai->driver->remove_order == order) {
1006                 if (dai->driver->remove) {
1007                         err = dai->driver->remove(dai);
1008                         if (err < 0)
1009                                 dev_err(dai->dev,
1010                                         "ASoC: failed to remove %s: %d\n",
1011                                         dai->name, err);
1012                 }
1013                 dai->probed = 0;
1014         }
1015 }
1016 
1017 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1018 {
1019         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1020         int i;
1021 
1022         /* unregister the rtd device */
1023         if (rtd->dev_registered) {
1024                 device_unregister(rtd->dev);
1025                 rtd->dev_registered = 0;
1026         }
1027 
1028         /* remove the CODEC DAI */
1029         for (i = 0; i < rtd->num_codecs; i++)
1030                 soc_remove_dai(rtd->codec_dais[i], order);
1031 
1032         soc_remove_dai(rtd->cpu_dai, order);
1033 }
1034 
1035 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1036                                        int order)
1037 {
1038         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1039         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1040         struct snd_soc_platform *platform = rtd->platform;
1041         struct snd_soc_component *component;
1042         int i;
1043 
1044         /* remove the platform */
1045         if (platform && platform->component.driver->remove_order == order)
1046                 soc_remove_component(&platform->component);
1047 
1048         /* remove the CODEC-side CODEC */
1049         for (i = 0; i < rtd->num_codecs; i++) {
1050                 component = rtd->codec_dais[i]->component;
1051                 if (component->driver->remove_order == order)
1052                         soc_remove_component(component);
1053         }
1054 
1055         /* remove any CPU-side CODEC */
1056         if (cpu_dai) {
1057                 if (cpu_dai->component->driver->remove_order == order)
1058                         soc_remove_component(cpu_dai->component);
1059         }
1060 }
1061 
1062 static void soc_remove_dai_links(struct snd_soc_card *card)
1063 {
1064         int dai, order;
1065 
1066         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1067                         order++) {
1068                 for (dai = 0; dai < card->num_rtd; dai++)
1069                         soc_remove_link_dais(card, dai, order);
1070         }
1071 
1072         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1073                         order++) {
1074                 for (dai = 0; dai < card->num_rtd; dai++)
1075                         soc_remove_link_components(card, dai, order);
1076         }
1077 
1078         card->num_rtd = 0;
1079 }
1080 
1081 static void soc_set_name_prefix(struct snd_soc_card *card,
1082                                 struct snd_soc_component *component)
1083 {
1084         int i;
1085 
1086         if (card->codec_conf == NULL)
1087                 return;
1088 
1089         for (i = 0; i < card->num_configs; i++) {
1090                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1091                 if (map->of_node && component->dev->of_node != map->of_node)
1092                         continue;
1093                 if (map->dev_name && strcmp(component->name, map->dev_name))
1094                         continue;
1095                 component->name_prefix = map->name_prefix;
1096                 break;
1097         }
1098 }
1099 
1100 static int soc_probe_component(struct snd_soc_card *card,
1101         struct snd_soc_component *component)
1102 {
1103         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1104         struct snd_soc_dai *dai;
1105         int ret;
1106 
1107         if (!strcmp(component->name, "snd-soc-dummy"))
1108                 return 0;
1109 
1110         if (component->card) {
1111                 if (component->card != card) {
1112                         dev_err(component->dev,
1113                                 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1114                                 card->name, component->card->name);
1115                         return -ENODEV;
1116                 }
1117                 return 0;
1118         }
1119 
1120         if (!try_module_get(component->dev->driver->owner))
1121                 return -ENODEV;
1122 
1123         component->card = card;
1124         dapm->card = card;
1125         soc_set_name_prefix(card, component);
1126 
1127         soc_init_component_debugfs(component);
1128 
1129         if (component->dapm_widgets) {
1130                 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1131                         component->num_dapm_widgets);
1132 
1133                 if (ret != 0) {
1134                         dev_err(component->dev,
1135                                 "Failed to create new controls %d\n", ret);
1136                         goto err_probe;
1137                 }
1138         }
1139 
1140         list_for_each_entry(dai, &component->dai_list, list) {
1141                 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1142                 if (ret != 0) {
1143                         dev_err(component->dev,
1144                                 "Failed to create DAI widgets %d\n", ret);
1145                         goto err_probe;
1146                 }
1147         }
1148 
1149         if (component->probe) {
1150                 ret = component->probe(component);
1151                 if (ret < 0) {
1152                         dev_err(component->dev,
1153                                 "ASoC: failed to probe component %d\n", ret);
1154                         goto err_probe;
1155                 }
1156 
1157                 WARN(dapm->idle_bias_off &&
1158                         dapm->bias_level != SND_SOC_BIAS_OFF,
1159                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1160                         component->name);
1161         }
1162 
1163         if (component->controls)
1164                 snd_soc_add_component_controls(component, component->controls,
1165                                      component->num_controls);
1166         if (component->dapm_routes)
1167                 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1168                                         component->num_dapm_routes);
1169 
1170         list_add(&dapm->list, &card->dapm_list);
1171 
1172         /* This is a HACK and will be removed soon */
1173         if (component->codec)
1174                 list_add(&component->codec->card_list, &card->codec_dev_list);
1175 
1176         return 0;
1177 
1178 err_probe:
1179         soc_cleanup_component_debugfs(component);
1180         component->card = NULL;
1181         module_put(component->dev->driver->owner);
1182 
1183         return ret;
1184 }
1185 
1186 static void rtd_release(struct device *dev)
1187 {
1188         kfree(dev);
1189 }
1190 
1191 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1192         const char *name)
1193 {
1194         int ret = 0;
1195 
1196         /* register the rtd device */
1197         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1198         if (!rtd->dev)
1199                 return -ENOMEM;
1200         device_initialize(rtd->dev);
1201         rtd->dev->parent = rtd->card->dev;
1202         rtd->dev->release = rtd_release;
1203         rtd->dev->groups = soc_dev_attr_groups;
1204         dev_set_name(rtd->dev, "%s", name);
1205         dev_set_drvdata(rtd->dev, rtd);
1206         mutex_init(&rtd->pcm_mutex);
1207         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1208         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1209         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1210         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1211         ret = device_add(rtd->dev);
1212         if (ret < 0) {
1213                 /* calling put_device() here to free the rtd->dev */
1214                 put_device(rtd->dev);
1215                 dev_err(rtd->card->dev,
1216                         "ASoC: failed to register runtime device: %d\n", ret);
1217                 return ret;
1218         }
1219         rtd->dev_registered = 1;
1220         return 0;
1221 }
1222 
1223 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1224                                      int order)
1225 {
1226         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1227         struct snd_soc_platform *platform = rtd->platform;
1228         struct snd_soc_component *component;
1229         int i, ret;
1230 
1231         /* probe the CPU-side component, if it is a CODEC */
1232         component = rtd->cpu_dai->component;
1233         if (component->driver->probe_order == order) {
1234                 ret = soc_probe_component(card, component);
1235                 if (ret < 0)
1236                         return ret;
1237         }
1238 
1239         /* probe the CODEC-side components */
1240         for (i = 0; i < rtd->num_codecs; i++) {
1241                 component = rtd->codec_dais[i]->component;
1242                 if (component->driver->probe_order == order) {
1243                         ret = soc_probe_component(card, component);
1244                         if (ret < 0)
1245                                 return ret;
1246                 }
1247         }
1248 
1249         /* probe the platform */
1250         if (platform->component.driver->probe_order == order) {
1251                 ret = soc_probe_component(card, &platform->component);
1252                 if (ret < 0)
1253                         return ret;
1254         }
1255 
1256         return 0;
1257 }
1258 
1259 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1260 {
1261         int ret;
1262 
1263         if (!dai->probed && dai->driver->probe_order == order) {
1264                 if (dai->driver->probe) {
1265                         ret = dai->driver->probe(dai);
1266                         if (ret < 0) {
1267                                 dev_err(dai->dev,
1268                                         "ASoC: failed to probe DAI %s: %d\n",
1269                                         dai->name, ret);
1270                                 return ret;
1271                         }
1272                 }
1273 
1274                 dai->probed = 1;
1275         }
1276 
1277         return 0;
1278 }
1279 
1280 static int soc_link_dai_widgets(struct snd_soc_card *card,
1281                                 struct snd_soc_dai_link *dai_link,
1282                                 struct snd_soc_pcm_runtime *rtd)
1283 {
1284         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1285         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1286         struct snd_soc_dapm_widget *play_w, *capture_w;
1287         int ret;
1288 
1289         if (rtd->num_codecs > 1)
1290                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1291 
1292         /* link the DAI widgets */
1293         play_w = codec_dai->playback_widget;
1294         capture_w = cpu_dai->capture_widget;
1295         if (play_w && capture_w) {
1296                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1297                                            dai_link->num_params, capture_w,
1298                                            play_w);
1299                 if (ret != 0) {
1300                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1301                                 play_w->name, capture_w->name, ret);
1302                         return ret;
1303                 }
1304         }
1305 
1306         play_w = cpu_dai->playback_widget;
1307         capture_w = codec_dai->capture_widget;
1308         if (play_w && capture_w) {
1309                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1310                                            dai_link->num_params, capture_w,
1311                                            play_w);
1312                 if (ret != 0) {
1313                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1314                                 play_w->name, capture_w->name, ret);
1315                         return ret;
1316                 }
1317         }
1318 
1319         return 0;
1320 }
1321 
1322 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1323 {
1324         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1325         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1326         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1327         int i, ret;
1328 
1329         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1330                         card->name, num, order);
1331 
1332         /* set default power off timeout */
1333         rtd->pmdown_time = pmdown_time;
1334 
1335         ret = soc_probe_dai(cpu_dai, order);
1336         if (ret)
1337                 return ret;
1338 
1339         /* probe the CODEC DAI */
1340         for (i = 0; i < rtd->num_codecs; i++) {
1341                 ret = soc_probe_dai(rtd->codec_dais[i], order);
1342                 if (ret)
1343                         return ret;
1344         }
1345 
1346         /* complete DAI probe during last probe */
1347         if (order != SND_SOC_COMP_ORDER_LAST)
1348                 return 0;
1349 
1350         /* do machine specific initialization */
1351         if (dai_link->init) {
1352                 ret = dai_link->init(rtd);
1353                 if (ret < 0) {
1354                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1355                                 dai_link->name, ret);
1356                         return ret;
1357                 }
1358         }
1359 
1360         if (dai_link->dai_fmt)
1361                 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1362 
1363         ret = soc_post_component_init(rtd, dai_link->name);
1364         if (ret)
1365                 return ret;
1366 
1367 #ifdef CONFIG_DEBUG_FS
1368         /* add DPCM sysfs entries */
1369         if (dai_link->dynamic)
1370                 soc_dpcm_debugfs_add(rtd);
1371 #endif
1372 
1373         if (cpu_dai->driver->compress_new) {
1374                 /*create compress_device"*/
1375                 ret = cpu_dai->driver->compress_new(rtd, num);
1376                 if (ret < 0) {
1377                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1378                                          dai_link->stream_name);
1379                         return ret;
1380                 }
1381         } else {
1382 
1383                 if (!dai_link->params) {
1384                         /* create the pcm */
1385                         ret = soc_new_pcm(rtd, num);
1386                         if (ret < 0) {
1387                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1388                                        dai_link->stream_name, ret);
1389                                 return ret;
1390                         }
1391                 } else {
1392                         INIT_DELAYED_WORK(&rtd->delayed_work,
1393                                                 codec2codec_close_delayed_work);
1394 
1395                         /* link the DAI widgets */
1396                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1397                         if (ret)
1398                                 return ret;
1399                 }
1400         }
1401 
1402         return 0;
1403 }
1404 
1405 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1406 {
1407         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1408         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1409         const char *name = aux_dev->codec_name;
1410 
1411         rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1412         if (!rtd->component) {
1413                 if (aux_dev->codec_of_node)
1414                         name = of_node_full_name(aux_dev->codec_of_node);
1415 
1416                 dev_err(card->dev, "ASoC: %s not registered\n", name);
1417                 return -EPROBE_DEFER;
1418         }
1419 
1420         /*
1421          * Some places still reference rtd->codec, so we have to keep that
1422          * initialized if the component is a CODEC. Once all those references
1423          * have been removed, this code can be removed as well.
1424          */
1425          rtd->codec = rtd->component->codec;
1426 
1427         return 0;
1428 }
1429 
1430 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1431 {
1432         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1433         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1434         int ret;
1435 
1436         ret = soc_probe_component(card, rtd->component);
1437         if (ret < 0)
1438                 return ret;
1439 
1440         /* do machine specific initialization */
1441         if (aux_dev->init) {
1442                 ret = aux_dev->init(rtd->component);
1443                 if (ret < 0) {
1444                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1445                                 aux_dev->name, ret);
1446                         return ret;
1447                 }
1448         }
1449 
1450         return soc_post_component_init(rtd, aux_dev->name);
1451 }
1452 
1453 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1454 {
1455         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1456         struct snd_soc_component *component = rtd->component;
1457 
1458         /* unregister the rtd device */
1459         if (rtd->dev_registered) {
1460                 device_unregister(rtd->dev);
1461                 rtd->dev_registered = 0;
1462         }
1463 
1464         if (component)
1465                 soc_remove_component(component);
1466 }
1467 
1468 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1469 {
1470         int ret;
1471 
1472         if (codec->cache_init)
1473                 return 0;
1474 
1475         ret = snd_soc_cache_init(codec);
1476         if (ret < 0) {
1477                 dev_err(codec->dev,
1478                         "ASoC: Failed to set cache compression type: %d\n",
1479                         ret);
1480                 return ret;
1481         }
1482         codec->cache_init = 1;
1483         return 0;
1484 }
1485 
1486 /**
1487  * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1488  * @rtd: The runtime for which the DAI link format should be changed
1489  * @dai_fmt: The new DAI link format
1490  *
1491  * This function updates the DAI link format for all DAIs connected to the DAI
1492  * link for the specified runtime.
1493  *
1494  * Note: For setups with a static format set the dai_fmt field in the
1495  * corresponding snd_dai_link struct instead of using this function.
1496  *
1497  * Returns 0 on success, otherwise a negative error code.
1498  */
1499 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1500         unsigned int dai_fmt)
1501 {
1502         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1503         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1504         unsigned int i;
1505         int ret;
1506 
1507         for (i = 0; i < rtd->num_codecs; i++) {
1508                 struct snd_soc_dai *codec_dai = codec_dais[i];
1509 
1510                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1511                 if (ret != 0 && ret != -ENOTSUPP) {
1512                         dev_warn(codec_dai->dev,
1513                                  "ASoC: Failed to set DAI format: %d\n", ret);
1514                         return ret;
1515                 }
1516         }
1517 
1518         /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1519         if (cpu_dai->codec) {
1520                 unsigned int inv_dai_fmt;
1521 
1522                 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1523                 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1524                 case SND_SOC_DAIFMT_CBM_CFM:
1525                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1526                         break;
1527                 case SND_SOC_DAIFMT_CBM_CFS:
1528                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1529                         break;
1530                 case SND_SOC_DAIFMT_CBS_CFM:
1531                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1532                         break;
1533                 case SND_SOC_DAIFMT_CBS_CFS:
1534                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1535                         break;
1536                 }
1537 
1538                 dai_fmt = inv_dai_fmt;
1539         }
1540 
1541         ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1542         if (ret != 0 && ret != -ENOTSUPP) {
1543                 dev_warn(cpu_dai->dev,
1544                          "ASoC: Failed to set DAI format: %d\n", ret);
1545                 return ret;
1546         }
1547 
1548         return 0;
1549 }
1550 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1551 
1552 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1553 {
1554         struct snd_soc_codec *codec;
1555         int ret, i, order;
1556 
1557         mutex_lock(&client_mutex);
1558         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1559 
1560         /* bind DAIs */
1561         for (i = 0; i < card->num_links; i++) {
1562                 ret = soc_bind_dai_link(card, i);
1563                 if (ret != 0)
1564                         goto base_error;
1565         }
1566 
1567         /* bind aux_devs too */
1568         for (i = 0; i < card->num_aux_devs; i++) {
1569                 ret = soc_bind_aux_dev(card, i);
1570                 if (ret != 0)
1571                         goto base_error;
1572         }
1573 
1574         /* initialize the register cache for each available codec */
1575         list_for_each_entry(codec, &codec_list, list) {
1576                 if (codec->cache_init)
1577                         continue;
1578                 ret = snd_soc_init_codec_cache(codec);
1579                 if (ret < 0)
1580                         goto base_error;
1581         }
1582 
1583         /* card bind complete so register a sound card */
1584         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1585                         card->owner, 0, &card->snd_card);
1586         if (ret < 0) {
1587                 dev_err(card->dev,
1588                         "ASoC: can't create sound card for card %s: %d\n",
1589                         card->name, ret);
1590                 goto base_error;
1591         }
1592 
1593         soc_init_card_debugfs(card);
1594 
1595         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1596         card->dapm.dev = card->dev;
1597         card->dapm.card = card;
1598         list_add(&card->dapm.list, &card->dapm_list);
1599 
1600 #ifdef CONFIG_DEBUG_FS
1601         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1602 #endif
1603 
1604 #ifdef CONFIG_PM_SLEEP
1605         /* deferred resume work */
1606         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1607 #endif
1608 
1609         if (card->dapm_widgets)
1610                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1611                                           card->num_dapm_widgets);
1612 
1613         if (card->of_dapm_widgets)
1614                 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1615                                           card->num_of_dapm_widgets);
1616 
1617         /* initialise the sound card only once */
1618         if (card->probe) {
1619                 ret = card->probe(card);
1620                 if (ret < 0)
1621                         goto card_probe_error;
1622         }
1623 
1624         /* probe all components used by DAI links on this card */
1625         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1626                         order++) {
1627                 for (i = 0; i < card->num_links; i++) {
1628                         ret = soc_probe_link_components(card, i, order);
1629                         if (ret < 0) {
1630                                 dev_err(card->dev,
1631                                         "ASoC: failed to instantiate card %d\n",
1632                                         ret);
1633                                 goto probe_dai_err;
1634                         }
1635                 }
1636         }
1637 
1638         /* probe all DAI links on this card */
1639         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1640                         order++) {
1641                 for (i = 0; i < card->num_links; i++) {
1642                         ret = soc_probe_link_dais(card, i, order);
1643                         if (ret < 0) {
1644                                 dev_err(card->dev,
1645                                         "ASoC: failed to instantiate card %d\n",
1646                                         ret);
1647                                 goto probe_dai_err;
1648                         }
1649                 }
1650         }
1651 
1652         for (i = 0; i < card->num_aux_devs; i++) {
1653                 ret = soc_probe_aux_dev(card, i);
1654                 if (ret < 0) {
1655                         dev_err(card->dev,
1656                                 "ASoC: failed to add auxiliary devices %d\n",
1657                                 ret);
1658                         goto probe_aux_dev_err;
1659                 }
1660         }
1661 
1662         snd_soc_dapm_link_dai_widgets(card);
1663         snd_soc_dapm_connect_dai_link_widgets(card);
1664 
1665         if (card->controls)
1666                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1667 
1668         if (card->dapm_routes)
1669                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1670                                         card->num_dapm_routes);
1671 
1672         if (card->of_dapm_routes)
1673                 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1674                                         card->num_of_dapm_routes);
1675 
1676         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1677                  "%s", card->name);
1678         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1679                  "%s", card->long_name ? card->long_name : card->name);
1680         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1681                  "%s", card->driver_name ? card->driver_name : card->name);
1682         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1683                 switch (card->snd_card->driver[i]) {
1684                 case '_':
1685                 case '-':
1686                 case '\0':
1687                         break;
1688                 default:
1689                         if (!isalnum(card->snd_card->driver[i]))
1690                                 card->snd_card->driver[i] = '_';
1691                         break;
1692                 }
1693         }
1694 
1695         if (card->late_probe) {
1696                 ret = card->late_probe(card);
1697                 if (ret < 0) {
1698                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1699                                 card->name, ret);
1700                         goto probe_aux_dev_err;
1701                 }
1702         }
1703 
1704         snd_soc_dapm_new_widgets(card);
1705 
1706         ret = snd_card_register(card->snd_card);
1707         if (ret < 0) {
1708                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1709                                 ret);
1710                 goto probe_aux_dev_err;
1711         }
1712 
1713         card->instantiated = 1;
1714         snd_soc_dapm_sync(&card->dapm);
1715         mutex_unlock(&card->mutex);
1716         mutex_unlock(&client_mutex);
1717 
1718         return 0;
1719 
1720 probe_aux_dev_err:
1721         for (i = 0; i < card->num_aux_devs; i++)
1722                 soc_remove_aux_dev(card, i);
1723 
1724 probe_dai_err:
1725         soc_remove_dai_links(card);
1726 
1727 card_probe_error:
1728         if (card->remove)
1729                 card->remove(card);
1730 
1731         snd_soc_dapm_free(&card->dapm);
1732         soc_cleanup_card_debugfs(card);
1733         snd_card_free(card->snd_card);
1734 
1735 base_error:
1736         mutex_unlock(&card->mutex);
1737         mutex_unlock(&client_mutex);
1738 
1739         return ret;
1740 }
1741 
1742 /* probes a new socdev */
1743 static int soc_probe(struct platform_device *pdev)
1744 {
1745         struct snd_soc_card *card = platform_get_drvdata(pdev);
1746 
1747         /*
1748          * no card, so machine driver should be registering card
1749          * we should not be here in that case so ret error
1750          */
1751         if (!card)
1752                 return -EINVAL;
1753 
1754         dev_warn(&pdev->dev,
1755                  "ASoC: machine %s should use snd_soc_register_card()\n",
1756                  card->name);
1757 
1758         /* Bodge while we unpick instantiation */
1759         card->dev = &pdev->dev;
1760 
1761         return snd_soc_register_card(card);
1762 }
1763 
1764 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1765 {
1766         int i;
1767 
1768         /* make sure any delayed work runs */
1769         for (i = 0; i < card->num_rtd; i++) {
1770                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1771                 flush_delayed_work(&rtd->delayed_work);
1772         }
1773 
1774         /* remove auxiliary devices */
1775         for (i = 0; i < card->num_aux_devs; i++)
1776                 soc_remove_aux_dev(card, i);
1777 
1778         /* remove and free each DAI */
1779         soc_remove_dai_links(card);
1780 
1781         soc_cleanup_card_debugfs(card);
1782 
1783         /* remove the card */
1784         if (card->remove)
1785                 card->remove(card);
1786 
1787         snd_soc_dapm_free(&card->dapm);
1788 
1789         snd_card_free(card->snd_card);
1790         return 0;
1791 
1792 }
1793 
1794 /* removes a socdev */
1795 static int soc_remove(struct platform_device *pdev)
1796 {
1797         struct snd_soc_card *card = platform_get_drvdata(pdev);
1798 
1799         snd_soc_unregister_card(card);
1800         return 0;
1801 }
1802 
1803 int snd_soc_poweroff(struct device *dev)
1804 {
1805         struct snd_soc_card *card = dev_get_drvdata(dev);
1806         int i;
1807 
1808         if (!card->instantiated)
1809                 return 0;
1810 
1811         /* Flush out pmdown_time work - we actually do want to run it
1812          * now, we're shutting down so no imminent restart. */
1813         for (i = 0; i < card->num_rtd; i++) {
1814                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1815                 flush_delayed_work(&rtd->delayed_work);
1816         }
1817 
1818         snd_soc_dapm_shutdown(card);
1819 
1820         /* deactivate pins to sleep state */
1821         for (i = 0; i < card->num_rtd; i++) {
1822                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1823                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1824                 int j;
1825 
1826                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1827                 for (j = 0; j < rtd->num_codecs; j++) {
1828                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1829                         pinctrl_pm_select_sleep_state(codec_dai->dev);
1830                 }
1831         }
1832 
1833         return 0;
1834 }
1835 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1836 
1837 const struct dev_pm_ops snd_soc_pm_ops = {
1838         .suspend = snd_soc_suspend,
1839         .resume = snd_soc_resume,
1840         .freeze = snd_soc_suspend,
1841         .thaw = snd_soc_resume,
1842         .poweroff = snd_soc_poweroff,
1843         .restore = snd_soc_resume,
1844 };
1845 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1846 
1847 /* ASoC platform driver */
1848 static struct platform_driver soc_driver = {
1849         .driver         = {
1850                 .name           = "soc-audio",
1851                 .pm             = &snd_soc_pm_ops,
1852         },
1853         .probe          = soc_probe,
1854         .remove         = soc_remove,
1855 };
1856 
1857 /**
1858  * snd_soc_cnew - create new control
1859  * @_template: control template
1860  * @data: control private data
1861  * @long_name: control long name
1862  * @prefix: control name prefix
1863  *
1864  * Create a new mixer control from a template control.
1865  *
1866  * Returns 0 for success, else error.
1867  */
1868 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1869                                   void *data, const char *long_name,
1870                                   const char *prefix)
1871 {
1872         struct snd_kcontrol_new template;
1873         struct snd_kcontrol *kcontrol;
1874         char *name = NULL;
1875 
1876         memcpy(&template, _template, sizeof(template));
1877         template.index = 0;
1878 
1879         if (!long_name)
1880                 long_name = template.name;
1881 
1882         if (prefix) {
1883                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1884                 if (!name)
1885                         return NULL;
1886 
1887                 template.name = name;
1888         } else {
1889                 template.name = long_name;
1890         }
1891 
1892         kcontrol = snd_ctl_new1(&template, data);
1893 
1894         kfree(name);
1895 
1896         return kcontrol;
1897 }
1898 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1899 
1900 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1901         const struct snd_kcontrol_new *controls, int num_controls,
1902         const char *prefix, void *data)
1903 {
1904         int err, i;
1905 
1906         for (i = 0; i < num_controls; i++) {
1907                 const struct snd_kcontrol_new *control = &controls[i];
1908                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1909                                                      control->name, prefix));
1910                 if (err < 0) {
1911                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
1912                                 control->name, err);
1913                         return err;
1914                 }
1915         }
1916 
1917         return 0;
1918 }
1919 
1920 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1921                                                const char *name)
1922 {
1923         struct snd_card *card = soc_card->snd_card;
1924         struct snd_kcontrol *kctl;
1925 
1926         if (unlikely(!name))
1927                 return NULL;
1928 
1929         list_for_each_entry(kctl, &card->controls, list)
1930                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1931                         return kctl;
1932         return NULL;
1933 }
1934 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1935 
1936 /**
1937  * snd_soc_add_component_controls - Add an array of controls to a component.
1938  *
1939  * @component: Component to add controls to
1940  * @controls: Array of controls to add
1941  * @num_controls: Number of elements in the array
1942  *
1943  * Return: 0 for success, else error.
1944  */
1945 int snd_soc_add_component_controls(struct snd_soc_component *component,
1946         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1947 {
1948         struct snd_card *card = component->card->snd_card;
1949 
1950         return snd_soc_add_controls(card, component->dev, controls,
1951                         num_controls, component->name_prefix, component);
1952 }
1953 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1954 
1955 /**
1956  * snd_soc_add_codec_controls - add an array of controls to a codec.
1957  * Convenience function to add a list of controls. Many codecs were
1958  * duplicating this code.
1959  *
1960  * @codec: codec to add controls to
1961  * @controls: array of controls to add
1962  * @num_controls: number of elements in the array
1963  *
1964  * Return 0 for success, else error.
1965  */
1966 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1967         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1968 {
1969         return snd_soc_add_component_controls(&codec->component, controls,
1970                 num_controls);
1971 }
1972 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1973 
1974 /**
1975  * snd_soc_add_platform_controls - add an array of controls to a platform.
1976  * Convenience function to add a list of controls.
1977  *
1978  * @platform: platform to add controls to
1979  * @controls: array of controls to add
1980  * @num_controls: number of elements in the array
1981  *
1982  * Return 0 for success, else error.
1983  */
1984 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1985         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1986 {
1987         return snd_soc_add_component_controls(&platform->component, controls,
1988                 num_controls);
1989 }
1990 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1991 
1992 /**
1993  * snd_soc_add_card_controls - add an array of controls to a SoC card.
1994  * Convenience function to add a list of controls.
1995  *
1996  * @soc_card: SoC card to add controls to
1997  * @controls: array of controls to add
1998  * @num_controls: number of elements in the array
1999  *
2000  * Return 0 for success, else error.
2001  */
2002 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2003         const struct snd_kcontrol_new *controls, int num_controls)
2004 {
2005         struct snd_card *card = soc_card->snd_card;
2006 
2007         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2008                         NULL, soc_card);
2009 }
2010 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2011 
2012 /**
2013  * snd_soc_add_dai_controls - add an array of controls to a DAI.
2014  * Convienience function to add a list of controls.
2015  *
2016  * @dai: DAI to add controls to
2017  * @controls: array of controls to add
2018  * @num_controls: number of elements in the array
2019  *
2020  * Return 0 for success, else error.
2021  */
2022 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2023         const struct snd_kcontrol_new *controls, int num_controls)
2024 {
2025         struct snd_card *card = dai->component->card->snd_card;
2026 
2027         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2028                         NULL, dai);
2029 }
2030 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2031 
2032 /**
2033  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2034  * @dai: DAI
2035  * @clk_id: DAI specific clock ID
2036  * @freq: new clock frequency in Hz
2037  * @dir: new clock direction - input/output.
2038  *
2039  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2040  */
2041 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2042         unsigned int freq, int dir)
2043 {
2044         if (dai->driver && dai->driver->ops->set_sysclk)
2045                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2046         else if (dai->codec && dai->codec->driver->set_sysclk)
2047                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2048                                                       freq, dir);
2049         else
2050                 return -ENOTSUPP;
2051 }
2052 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2053 
2054 /**
2055  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2056  * @codec: CODEC
2057  * @clk_id: DAI specific clock ID
2058  * @source: Source for the clock
2059  * @freq: new clock frequency in Hz
2060  * @dir: new clock direction - input/output.
2061  *
2062  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2063  */
2064 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2065                              int source, unsigned int freq, int dir)
2066 {
2067         if (codec->driver->set_sysclk)
2068                 return codec->driver->set_sysclk(codec, clk_id, source,
2069                                                  freq, dir);
2070         else
2071                 return -ENOTSUPP;
2072 }
2073 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2074 
2075 /**
2076  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2077  * @dai: DAI
2078  * @div_id: DAI specific clock divider ID
2079  * @div: new clock divisor.
2080  *
2081  * Configures the clock dividers. This is used to derive the best DAI bit and
2082  * frame clocks from the system or master clock. It's best to set the DAI bit
2083  * and frame clocks as low as possible to save system power.
2084  */
2085 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2086         int div_id, int div)
2087 {
2088         if (dai->driver && dai->driver->ops->set_clkdiv)
2089                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2090         else
2091                 return -EINVAL;
2092 }
2093 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2094 
2095 /**
2096  * snd_soc_dai_set_pll - configure DAI PLL.
2097  * @dai: DAI
2098  * @pll_id: DAI specific PLL ID
2099  * @source: DAI specific source for the PLL
2100  * @freq_in: PLL input clock frequency in Hz
2101  * @freq_out: requested PLL output clock frequency in Hz
2102  *
2103  * Configures and enables PLL to generate output clock based on input clock.
2104  */
2105 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2106         unsigned int freq_in, unsigned int freq_out)
2107 {
2108         if (dai->driver && dai->driver->ops->set_pll)
2109                 return dai->driver->ops->set_pll(dai, pll_id, source,
2110                                          freq_in, freq_out);
2111         else if (dai->codec && dai->codec->driver->set_pll)
2112                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2113                                                    freq_in, freq_out);
2114         else
2115                 return -EINVAL;
2116 }
2117 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2118 
2119 /*
2120  * snd_soc_codec_set_pll - configure codec PLL.
2121  * @codec: CODEC
2122  * @pll_id: DAI specific PLL ID
2123  * @source: DAI specific source for the PLL
2124  * @freq_in: PLL input clock frequency in Hz
2125  * @freq_out: requested PLL output clock frequency in Hz
2126  *
2127  * Configures and enables PLL to generate output clock based on input clock.
2128  */
2129 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2130                           unsigned int freq_in, unsigned int freq_out)
2131 {
2132         if (codec->driver->set_pll)
2133                 return codec->driver->set_pll(codec, pll_id, source,
2134                                               freq_in, freq_out);
2135         else
2136                 return -EINVAL;
2137 }
2138 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2139 
2140 /**
2141  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2142  * @dai: DAI
2143  * @ratio: Ratio of BCLK to Sample rate.
2144  *
2145  * Configures the DAI for a preset BCLK to sample rate ratio.
2146  */
2147 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2148 {
2149         if (dai->driver && dai->driver->ops->set_bclk_ratio)
2150                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2151         else
2152                 return -EINVAL;
2153 }
2154 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2155 
2156 /**
2157  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2158  * @dai: DAI
2159  * @fmt: SND_SOC_DAIFMT_ format value.
2160  *
2161  * Configures the DAI hardware format and clocking.
2162  */
2163 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2164 {
2165         if (dai->driver == NULL)
2166                 return -EINVAL;
2167         if (dai->driver->ops->set_fmt == NULL)
2168                 return -ENOTSUPP;
2169         return dai->driver->ops->set_fmt(dai, fmt);
2170 }
2171 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2172 
2173 /**
2174  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2175  * @slots: Number of slots in use.
2176  * @tx_mask: bitmask representing active TX slots.
2177  * @rx_mask: bitmask representing active RX slots.
2178  *
2179  * Generates the TDM tx and rx slot default masks for DAI.
2180  */
2181 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2182                                           unsigned int *tx_mask,
2183                                           unsigned int *rx_mask)
2184 {
2185         if (*tx_mask || *rx_mask)
2186                 return 0;
2187 
2188         if (!slots)
2189                 return -EINVAL;
2190 
2191         *tx_mask = (1 << slots) - 1;
2192         *rx_mask = (1 << slots) - 1;
2193 
2194         return 0;
2195 }
2196 
2197 /**
2198  * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2199  * @dai: The DAI to configure
2200  * @tx_mask: bitmask representing active TX slots.
2201  * @rx_mask: bitmask representing active RX slots.
2202  * @slots: Number of slots in use.
2203  * @slot_width: Width in bits for each slot.
2204  *
2205  * This function configures the specified DAI for TDM operation. @slot contains
2206  * the total number of slots of the TDM stream and @slot_with the width of each
2207  * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2208  * active slots of the TDM stream for the specified DAI, i.e. which slots the
2209  * DAI should write to or read from. If a bit is set the corresponding slot is
2210  * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2211  * the first slot, bit 1 to the second slot and so on. The first active slot
2212  * maps to the first channel of the DAI, the second active slot to the second
2213  * channel and so on.
2214  *
2215  * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2216  * @rx_mask and @slot_width will be ignored.
2217  *
2218  * Returns 0 on success, a negative error code otherwise.
2219  */
2220 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2221         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2222 {
2223         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2224                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2225                                                 &tx_mask, &rx_mask);
2226         else
2227                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2228 
2229         dai->tx_mask = tx_mask;
2230         dai->rx_mask = rx_mask;
2231 
2232         if (dai->driver && dai->driver->ops->set_tdm_slot)
2233                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2234                                 slots, slot_width);
2235         else
2236                 return -ENOTSUPP;
2237 }
2238 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2239 
2240 /**
2241  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2242  * @dai: DAI
2243  * @tx_num: how many TX channels
2244  * @tx_slot: pointer to an array which imply the TX slot number channel
2245  *           0~num-1 uses
2246  * @rx_num: how many RX channels
2247  * @rx_slot: pointer to an array which imply the RX slot number channel
2248  *           0~num-1 uses
2249  *
2250  * configure the relationship between channel number and TDM slot number.
2251  */
2252 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2253         unsigned int tx_num, unsigned int *tx_slot,
2254         unsigned int rx_num, unsigned int *rx_slot)
2255 {
2256         if (dai->driver && dai->driver->ops->set_channel_map)
2257                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2258                         rx_num, rx_slot);
2259         else
2260                 return -EINVAL;
2261 }
2262 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2263 
2264 /**
2265  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2266  * @dai: DAI
2267  * @tristate: tristate enable
2268  *
2269  * Tristates the DAI so that others can use it.
2270  */
2271 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2272 {
2273         if (dai->driver && dai->driver->ops->set_tristate)
2274                 return dai->driver->ops->set_tristate(dai, tristate);
2275         else
2276                 return -EINVAL;
2277 }
2278 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2279 
2280 /**
2281  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2282  * @dai: DAI
2283  * @mute: mute enable
2284  * @direction: stream to mute
2285  *
2286  * Mutes the DAI DAC.
2287  */
2288 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2289                              int direction)
2290 {
2291         if (!dai->driver)
2292                 return -ENOTSUPP;
2293 
2294         if (dai->driver->ops->mute_stream)
2295                 return dai->driver->ops->mute_stream(dai, mute, direction);
2296         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2297                  dai->driver->ops->digital_mute)
2298                 return dai->driver->ops->digital_mute(dai, mute);
2299         else
2300                 return -ENOTSUPP;
2301 }
2302 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2303 
2304 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2305                                    struct snd_soc_dai_link *dai_link)
2306 {
2307         /* Legacy codec/codec_dai link is a single entry in multicodec */
2308         if (dai_link->codec_name || dai_link->codec_of_node ||
2309             dai_link->codec_dai_name) {
2310                 dai_link->num_codecs = 1;
2311 
2312                 dai_link->codecs = devm_kzalloc(card->dev,
2313                                 sizeof(struct snd_soc_dai_link_component),
2314                                 GFP_KERNEL);
2315                 if (!dai_link->codecs)
2316                         return -ENOMEM;
2317 
2318                 dai_link->codecs[0].name = dai_link->codec_name;
2319                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2320                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2321         }
2322 
2323         if (!dai_link->codecs) {
2324                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2325                 return -EINVAL;
2326         }
2327 
2328         return 0;
2329 }
2330 
2331 /**
2332  * snd_soc_register_card - Register a card with the ASoC core
2333  *
2334  * @card: Card to register
2335  *
2336  */
2337 int snd_soc_register_card(struct snd_soc_card *card)
2338 {
2339         int i, j, ret;
2340 
2341         if (!card->name || !card->dev)
2342                 return -EINVAL;
2343 
2344         for (i = 0; i < card->num_links; i++) {
2345                 struct snd_soc_dai_link *link = &card->dai_link[i];
2346 
2347                 ret = snd_soc_init_multicodec(card, link);
2348                 if (ret) {
2349                         dev_err(card->dev, "ASoC: failed to init multicodec\n");
2350                         return ret;
2351                 }
2352 
2353                 for (j = 0; j < link->num_codecs; j++) {
2354                         /*
2355                          * Codec must be specified by 1 of name or OF node,
2356                          * not both or neither.
2357                          */
2358                         if (!!link->codecs[j].name ==
2359                             !!link->codecs[j].of_node) {
2360                                 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2361                                         link->name);
2362                                 return -EINVAL;
2363                         }
2364                         /* Codec DAI name must be specified */
2365                         if (!link->codecs[j].dai_name) {
2366                                 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2367                                         link->name);
2368                                 return -EINVAL;
2369                         }
2370                 }
2371 
2372                 /*
2373                  * Platform may be specified by either name or OF node, but
2374                  * can be left unspecified, and a dummy platform will be used.
2375                  */
2376                 if (link->platform_name && link->platform_of_node) {
2377                         dev_err(card->dev,
2378                                 "ASoC: Both platform name/of_node are set for %s\n",
2379                                 link->name);
2380                         return -EINVAL;
2381                 }
2382 
2383                 /*
2384                  * CPU device may be specified by either name or OF node, but
2385                  * can be left unspecified, and will be matched based on DAI
2386                  * name alone..
2387                  */
2388                 if (link->cpu_name && link->cpu_of_node) {
2389                         dev_err(card->dev,
2390                                 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2391                                 link->name);
2392                         return -EINVAL;
2393                 }
2394                 /*
2395                  * At least one of CPU DAI name or CPU device name/node must be
2396                  * specified
2397                  */
2398                 if (!link->cpu_dai_name &&
2399                     !(link->cpu_name || link->cpu_of_node)) {
2400                         dev_err(card->dev,
2401                                 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2402                                 link->name);
2403                         return -EINVAL;
2404                 }
2405         }
2406 
2407         dev_set_drvdata(card->dev, card);
2408 
2409         snd_soc_initialize_card_lists(card);
2410 
2411         card->rtd = devm_kzalloc(card->dev,
2412                                  sizeof(struct snd_soc_pcm_runtime) *
2413                                  (card->num_links + card->num_aux_devs),
2414                                  GFP_KERNEL);
2415         if (card->rtd == NULL)
2416                 return -ENOMEM;
2417         card->num_rtd = 0;
2418         card->rtd_aux = &card->rtd[card->num_links];
2419 
2420         for (i = 0; i < card->num_links; i++) {
2421                 card->rtd[i].card = card;
2422                 card->rtd[i].dai_link = &card->dai_link[i];
2423                 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2424                                         sizeof(struct snd_soc_dai *) *
2425                                         (card->rtd[i].dai_link->num_codecs),
2426                                         GFP_KERNEL);
2427                 if (card->rtd[i].codec_dais == NULL)
2428                         return -ENOMEM;
2429         }
2430 
2431         for (i = 0; i < card->num_aux_devs; i++)
2432                 card->rtd_aux[i].card = card;
2433 
2434         INIT_LIST_HEAD(&card->dapm_dirty);
2435         INIT_LIST_HEAD(&card->dobj_list);
2436         card->instantiated = 0;
2437         mutex_init(&card->mutex);
2438         mutex_init(&card->dapm_mutex);
2439 
2440         ret = snd_soc_instantiate_card(card);
2441         if (ret != 0)
2442                 return ret;
2443 
2444         /* deactivate pins to sleep state */
2445         for (i = 0; i < card->num_rtd; i++) {
2446                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2447                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2448                 int j;
2449 
2450                 for (j = 0; j < rtd->num_codecs; j++) {
2451                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2452                         if (!codec_dai->active)
2453                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
2454                 }
2455 
2456                 if (!cpu_dai->active)
2457                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
2458         }
2459 
2460         return ret;
2461 }
2462 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2463 
2464 /**
2465  * snd_soc_unregister_card - Unregister a card with the ASoC core
2466  *
2467  * @card: Card to unregister
2468  *
2469  */
2470 int snd_soc_unregister_card(struct snd_soc_card *card)
2471 {
2472         if (card->instantiated) {
2473                 card->instantiated = false;
2474                 snd_soc_dapm_shutdown(card);
2475                 soc_cleanup_card_resources(card);
2476                 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2477         }
2478 
2479         return 0;
2480 }
2481 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2482 
2483 /*
2484  * Simplify DAI link configuration by removing ".-1" from device names
2485  * and sanitizing names.
2486  */
2487 static char *fmt_single_name(struct device *dev, int *id)
2488 {
2489         char *found, name[NAME_SIZE];
2490         int id1, id2;
2491 
2492         if (dev_name(dev) == NULL)
2493                 return NULL;
2494 
2495         strlcpy(name, dev_name(dev), NAME_SIZE);
2496 
2497         /* are we a "%s.%d" name (platform and SPI components) */
2498         found = strstr(name, dev->driver->name);
2499         if (found) {
2500                 /* get ID */
2501                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2502 
2503                         /* discard ID from name if ID == -1 */
2504                         if (*id == -1)
2505                                 found[strlen(dev->driver->name)] = '\0';
2506                 }
2507 
2508         } else {
2509                 /* I2C component devices are named "bus-addr"  */
2510                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2511                         char tmp[NAME_SIZE];
2512 
2513                         /* create unique ID number from I2C addr and bus */
2514                         *id = ((id1 & 0xffff) << 16) + id2;
2515 
2516                         /* sanitize component name for DAI link creation */
2517                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2518                         strlcpy(name, tmp, NAME_SIZE);
2519                 } else
2520                         *id = 0;
2521         }
2522 
2523         return kstrdup(name, GFP_KERNEL);
2524 }
2525 
2526 /*
2527  * Simplify DAI link naming for single devices with multiple DAIs by removing
2528  * any ".-1" and using the DAI name (instead of device name).
2529  */
2530 static inline char *fmt_multiple_name(struct device *dev,
2531                 struct snd_soc_dai_driver *dai_drv)
2532 {
2533         if (dai_drv->name == NULL) {
2534                 dev_err(dev,
2535                         "ASoC: error - multiple DAI %s registered with no name\n",
2536                         dev_name(dev));
2537                 return NULL;
2538         }
2539 
2540         return kstrdup(dai_drv->name, GFP_KERNEL);
2541 }
2542 
2543 /**
2544  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2545  *
2546  * @component: The component for which the DAIs should be unregistered
2547  */
2548 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2549 {
2550         struct snd_soc_dai *dai, *_dai;
2551 
2552         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2553                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2554                         dai->name);
2555                 list_del(&dai->list);
2556                 kfree(dai->name);
2557                 kfree(dai);
2558         }
2559 }
2560 
2561 /**
2562  * snd_soc_register_dais - Register a DAI with the ASoC core
2563  *
2564  * @component: The component the DAIs are registered for
2565  * @dai_drv: DAI driver to use for the DAIs
2566  * @count: Number of DAIs
2567  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2568  *                     parent's name.
2569  */
2570 static int snd_soc_register_dais(struct snd_soc_component *component,
2571         struct snd_soc_dai_driver *dai_drv, size_t count,
2572         bool legacy_dai_naming)
2573 {
2574         struct device *dev = component->dev;
2575         struct snd_soc_dai *dai;
2576         unsigned int i;
2577         int ret;
2578 
2579         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2580 
2581         component->dai_drv = dai_drv;
2582         component->num_dai = count;
2583 
2584         for (i = 0; i < count; i++) {
2585 
2586                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2587                 if (dai == NULL) {
2588                         ret = -ENOMEM;
2589                         goto err;
2590                 }
2591 
2592                 /*
2593                  * Back in the old days when we still had component-less DAIs,
2594                  * instead of having a static name, component-less DAIs would
2595                  * inherit the name of the parent device so it is possible to
2596                  * register multiple instances of the DAI. We still need to keep
2597                  * the same naming style even though those DAIs are not
2598                  * component-less anymore.
2599                  */
2600                 if (count == 1 && legacy_dai_naming &&
2601                         (dai_drv[i].id == 0 || dai_drv[i].name == NULL)) {
2602                         dai->name = fmt_single_name(dev, &dai->id);
2603                 } else {
2604                         dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2605                         if (dai_drv[i].id)
2606                                 dai->id = dai_drv[i].id;
2607                         else
2608                                 dai->id = i;
2609                 }
2610                 if (dai->name == NULL) {
2611                         kfree(dai);
2612                         ret = -ENOMEM;
2613                         goto err;
2614                 }
2615 
2616                 dai->component = component;
2617                 dai->dev = dev;
2618                 dai->driver = &dai_drv[i];
2619                 if (!dai->driver->ops)
2620                         dai->driver->ops = &null_dai_ops;
2621 
2622                 list_add(&dai->list, &component->dai_list);
2623 
2624                 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2625         }
2626 
2627         return 0;
2628 
2629 err:
2630         snd_soc_unregister_dais(component);
2631 
2632         return ret;
2633 }
2634 
2635 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2636         enum snd_soc_dapm_type type, int subseq)
2637 {
2638         struct snd_soc_component *component = dapm->component;
2639 
2640         component->driver->seq_notifier(component, type, subseq);
2641 }
2642 
2643 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2644         int event)
2645 {
2646         struct snd_soc_component *component = dapm->component;
2647 
2648         return component->driver->stream_event(component, event);
2649 }
2650 
2651 static int snd_soc_component_initialize(struct snd_soc_component *component,
2652         const struct snd_soc_component_driver *driver, struct device *dev)
2653 {
2654         struct snd_soc_dapm_context *dapm;
2655 
2656         component->name = fmt_single_name(dev, &component->id);
2657         if (!component->name) {
2658                 dev_err(dev, "ASoC: Failed to allocate name\n");
2659                 return -ENOMEM;
2660         }
2661 
2662         component->dev = dev;
2663         component->driver = driver;
2664         component->probe = component->driver->probe;
2665         component->remove = component->driver->remove;
2666 
2667         dapm = &component->dapm;
2668         dapm->dev = dev;
2669         dapm->component = component;
2670         dapm->bias_level = SND_SOC_BIAS_OFF;
2671         dapm->idle_bias_off = true;
2672         if (driver->seq_notifier)
2673                 dapm->seq_notifier = snd_soc_component_seq_notifier;
2674         if (driver->stream_event)
2675                 dapm->stream_event = snd_soc_component_stream_event;
2676 
2677         component->controls = driver->controls;
2678         component->num_controls = driver->num_controls;
2679         component->dapm_widgets = driver->dapm_widgets;
2680         component->num_dapm_widgets = driver->num_dapm_widgets;
2681         component->dapm_routes = driver->dapm_routes;
2682         component->num_dapm_routes = driver->num_dapm_routes;
2683 
2684         INIT_LIST_HEAD(&component->dai_list);
2685         mutex_init(&component->io_mutex);
2686 
2687         return 0;
2688 }
2689 
2690 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2691 {
2692         int val_bytes = regmap_get_val_bytes(component->regmap);
2693 
2694         /* Errors are legitimate for non-integer byte multiples */
2695         if (val_bytes > 0)
2696                 component->val_bytes = val_bytes;
2697 }
2698 
2699 #ifdef CONFIG_REGMAP
2700 
2701 /**
2702  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2703  * @component: The component for which to initialize the regmap instance
2704  * @regmap: The regmap instance that should be used by the component
2705  *
2706  * This function allows deferred assignment of the regmap instance that is
2707  * associated with the component. Only use this if the regmap instance is not
2708  * yet ready when the component is registered. The function must also be called
2709  * before the first IO attempt of the component.
2710  */
2711 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2712         struct regmap *regmap)
2713 {
2714         component->regmap = regmap;
2715         snd_soc_component_setup_regmap(component);
2716 }
2717 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2718 
2719 /**
2720  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2721  * @component: The component for which to de-initialize the regmap instance
2722  *
2723  * Calls regmap_exit() on the regmap instance associated to the component and
2724  * removes the regmap instance from the component.
2725  *
2726  * This function should only be used if snd_soc_component_init_regmap() was used
2727  * to initialize the regmap instance.
2728  */
2729 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2730 {
2731         regmap_exit(component->regmap);
2732         component->regmap = NULL;
2733 }
2734 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2735 
2736 #endif
2737 
2738 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2739 {
2740         if (!component->write && !component->read) {
2741                 if (!component->regmap)
2742                         component->regmap = dev_get_regmap(component->dev, NULL);
2743                 if (component->regmap)
2744                         snd_soc_component_setup_regmap(component);
2745         }
2746 
2747         list_add(&component->list, &component_list);
2748         INIT_LIST_HEAD(&component->dobj_list);
2749 }
2750 
2751 static void snd_soc_component_add(struct snd_soc_component *component)
2752 {
2753         mutex_lock(&client_mutex);
2754         snd_soc_component_add_unlocked(component);
2755         mutex_unlock(&client_mutex);
2756 }
2757 
2758 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2759 {
2760         snd_soc_unregister_dais(component);
2761         kfree(component->name);
2762 }
2763 
2764 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2765 {
2766         list_del(&component->list);
2767 }
2768 
2769 int snd_soc_register_component(struct device *dev,
2770                                const struct snd_soc_component_driver *cmpnt_drv,
2771                                struct snd_soc_dai_driver *dai_drv,
2772                                int num_dai)
2773 {
2774         struct snd_soc_component *cmpnt;
2775         int ret;
2776 
2777         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2778         if (!cmpnt) {
2779                 dev_err(dev, "ASoC: Failed to allocate memory\n");
2780                 return -ENOMEM;
2781         }
2782 
2783         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2784         if (ret)
2785                 goto err_free;
2786 
2787         cmpnt->ignore_pmdown_time = true;
2788         cmpnt->registered_as_component = true;
2789 
2790         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2791         if (ret < 0) {
2792                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2793                 goto err_cleanup;
2794         }
2795 
2796         snd_soc_component_add(cmpnt);
2797 
2798         return 0;
2799 
2800 err_cleanup:
2801         snd_soc_component_cleanup(cmpnt);
2802 err_free:
2803         kfree(cmpnt);
2804         return ret;
2805 }
2806 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2807 
2808 /**
2809  * snd_soc_unregister_component - Unregister a component from the ASoC core
2810  *
2811  * @dev: The device to unregister
2812  */
2813 void snd_soc_unregister_component(struct device *dev)
2814 {
2815         struct snd_soc_component *cmpnt;
2816 
2817         mutex_lock(&client_mutex);
2818         list_for_each_entry(cmpnt, &component_list, list) {
2819                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2820                         goto found;
2821         }
2822         mutex_unlock(&client_mutex);
2823         return;
2824 
2825 found:
2826         snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
2827         snd_soc_component_del_unlocked(cmpnt);
2828         mutex_unlock(&client_mutex);
2829         snd_soc_component_cleanup(cmpnt);
2830         kfree(cmpnt);
2831 }
2832 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2833 
2834 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2835 {
2836         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2837 
2838         return platform->driver->probe(platform);
2839 }
2840 
2841 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2842 {
2843         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2844 
2845         platform->driver->remove(platform);
2846 }
2847 
2848 /**
2849  * snd_soc_add_platform - Add a platform to the ASoC core
2850  * @dev: The parent device for the platform
2851  * @platform: The platform to add
2852  * @platform_drv: The driver for the platform
2853  */
2854 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2855                 const struct snd_soc_platform_driver *platform_drv)
2856 {
2857         int ret;
2858 
2859         ret = snd_soc_component_initialize(&platform->component,
2860                         &platform_drv->component_driver, dev);
2861         if (ret)
2862                 return ret;
2863 
2864         platform->dev = dev;
2865         platform->driver = platform_drv;
2866 
2867         if (platform_drv->probe)
2868                 platform->component.probe = snd_soc_platform_drv_probe;
2869         if (platform_drv->remove)
2870                 platform->component.remove = snd_soc_platform_drv_remove;
2871 
2872 #ifdef CONFIG_DEBUG_FS
2873         platform->component.debugfs_prefix = "platform";
2874 #endif
2875 
2876         mutex_lock(&client_mutex);
2877         snd_soc_component_add_unlocked(&platform->component);
2878         list_add(&platform->list, &platform_list);
2879         mutex_unlock(&client_mutex);
2880 
2881         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2882                 platform->component.name);
2883 
2884         return 0;
2885 }
2886 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2887 
2888 /**
2889  * snd_soc_register_platform - Register a platform with the ASoC core
2890  *
2891  * @dev: The device for the platform
2892  * @platform_drv: The driver for the platform
2893  */
2894 int snd_soc_register_platform(struct device *dev,
2895                 const struct snd_soc_platform_driver *platform_drv)
2896 {
2897         struct snd_soc_platform *platform;
2898         int ret;
2899 
2900         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2901 
2902         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2903         if (platform == NULL)
2904                 return -ENOMEM;
2905 
2906         ret = snd_soc_add_platform(dev, platform, platform_drv);
2907         if (ret)
2908                 kfree(platform);
2909 
2910         return ret;
2911 }
2912 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2913 
2914 /**
2915  * snd_soc_remove_platform - Remove a platform from the ASoC core
2916  * @platform: the platform to remove
2917  */
2918 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2919 {
2920 
2921         mutex_lock(&client_mutex);
2922         list_del(&platform->list);
2923         snd_soc_component_del_unlocked(&platform->component);
2924         mutex_unlock(&client_mutex);
2925 
2926         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2927                 platform->component.name);
2928 
2929         snd_soc_component_cleanup(&platform->component);
2930 }
2931 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2932 
2933 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2934 {
2935         struct snd_soc_platform *platform;
2936 
2937         mutex_lock(&client_mutex);
2938         list_for_each_entry(platform, &platform_list, list) {
2939                 if (dev == platform->dev) {
2940                         mutex_unlock(&client_mutex);
2941                         return platform;
2942                 }
2943         }
2944         mutex_unlock(&client_mutex);
2945 
2946         return NULL;
2947 }
2948 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2949 
2950 /**
2951  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2952  *
2953  * @dev: platform to unregister
2954  */
2955 void snd_soc_unregister_platform(struct device *dev)
2956 {
2957         struct snd_soc_platform *platform;
2958 
2959         platform = snd_soc_lookup_platform(dev);
2960         if (!platform)
2961                 return;
2962 
2963         snd_soc_remove_platform(platform);
2964         kfree(platform);
2965 }
2966 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2967 
2968 static u64 codec_format_map[] = {
2969         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2970         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2971         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2972         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2973         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2974         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2975         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2976         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2977         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2978         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2979         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2980         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2981         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2982         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2983         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2984         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2985 };
2986 
2987 /* Fix up the DAI formats for endianness: codecs don't actually see
2988  * the endianness of the data but we're using the CPU format
2989  * definitions which do need to include endianness so we ensure that
2990  * codec DAIs always have both big and little endian variants set.
2991  */
2992 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2993 {
2994         int i;
2995 
2996         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2997                 if (stream->formats & codec_format_map[i])
2998                         stream->formats |= codec_format_map[i];
2999 }
3000 
3001 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3002 {
3003         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3004 
3005         return codec->driver->probe(codec);
3006 }
3007 
3008 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3009 {
3010         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3011 
3012         codec->driver->remove(codec);
3013 }
3014 
3015 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3016         unsigned int reg, unsigned int val)
3017 {
3018         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3019 
3020         return codec->driver->write(codec, reg, val);
3021 }
3022 
3023 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3024         unsigned int reg, unsigned int *val)
3025 {
3026         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3027 
3028         *val = codec->driver->read(codec, reg);
3029 
3030         return 0;
3031 }
3032 
3033 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3034         enum snd_soc_bias_level level)
3035 {
3036         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3037 
3038         return codec->driver->set_bias_level(codec, level);
3039 }
3040 
3041 /**
3042  * snd_soc_register_codec - Register a codec with the ASoC core
3043  *
3044  * @dev: The parent device for this codec
3045  * @codec_drv: Codec driver
3046  * @dai_drv: The associated DAI driver
3047  * @num_dai: Number of DAIs
3048  */
3049 int snd_soc_register_codec(struct device *dev,
3050                            const struct snd_soc_codec_driver *codec_drv,
3051                            struct snd_soc_dai_driver *dai_drv,
3052                            int num_dai)
3053 {
3054         struct snd_soc_dapm_context *dapm;
3055         struct snd_soc_codec *codec;
3056         struct snd_soc_dai *dai;
3057         int ret, i;
3058 
3059         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3060 
3061         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3062         if (codec == NULL)
3063                 return -ENOMEM;
3064 
3065         codec->component.codec = codec;
3066 
3067         ret = snd_soc_component_initialize(&codec->component,
3068                         &codec_drv->component_driver, dev);
3069         if (ret)
3070                 goto err_free;
3071 
3072         if (codec_drv->controls) {
3073                 codec->component.controls = codec_drv->controls;
3074                 codec->component.num_controls = codec_drv->num_controls;
3075         }
3076         if (codec_drv->dapm_widgets) {
3077                 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3078                 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3079         }
3080         if (codec_drv->dapm_routes) {
3081                 codec->component.dapm_routes = codec_drv->dapm_routes;
3082                 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3083         }
3084 
3085         if (codec_drv->probe)
3086                 codec->component.probe = snd_soc_codec_drv_probe;
3087         if (codec_drv->remove)
3088                 codec->component.remove = snd_soc_codec_drv_remove;
3089         if (codec_drv->write)
3090                 codec->component.write = snd_soc_codec_drv_write;
3091         if (codec_drv->read)
3092                 codec->component.read = snd_soc_codec_drv_read;
3093         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3094 
3095         dapm = snd_soc_codec_get_dapm(codec);
3096         dapm->idle_bias_off = codec_drv->idle_bias_off;
3097         dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3098         if (codec_drv->seq_notifier)
3099                 dapm->seq_notifier = codec_drv->seq_notifier;
3100         if (codec_drv->set_bias_level)
3101                 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3102         codec->dev = dev;
3103         codec->driver = codec_drv;
3104         codec->component.val_bytes = codec_drv->reg_word_size;
3105 
3106 #ifdef CONFIG_DEBUG_FS
3107         codec->component.init_debugfs = soc_init_codec_debugfs;
3108         codec->component.debugfs_prefix = "codec";
3109 #endif
3110 
3111         if (codec_drv->get_regmap)
3112                 codec->component.regmap = codec_drv->get_regmap(dev);
3113 
3114         for (i = 0; i < num_dai; i++) {
3115                 fixup_codec_formats(&dai_drv[i].playback);
3116                 fixup_codec_formats(&dai_drv[i].capture);
3117         }
3118 
3119         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3120         if (ret < 0) {
3121                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3122                 goto err_cleanup;
3123         }
3124 
3125         list_for_each_entry(dai, &codec->component.dai_list, list)
3126                 dai->codec = codec;
3127 
3128         mutex_lock(&client_mutex);
3129         snd_soc_component_add_unlocked(&codec->component);
3130         list_add(&codec->list, &codec_list);
3131         mutex_unlock(&client_mutex);
3132 
3133         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3134                 codec->component.name);
3135         return 0;
3136 
3137 err_cleanup:
3138         snd_soc_component_cleanup(&codec->component);
3139 err_free:
3140         kfree(codec);
3141         return ret;
3142 }
3143 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3144 
3145 /**
3146  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3147  *
3148  * @dev: codec to unregister
3149  */
3150 void snd_soc_unregister_codec(struct device *dev)
3151 {
3152         struct snd_soc_codec *codec;
3153 
3154         mutex_lock(&client_mutex);
3155         list_for_each_entry(codec, &codec_list, list) {
3156                 if (dev == codec->dev)
3157                         goto found;
3158         }
3159         mutex_unlock(&client_mutex);
3160         return;
3161 
3162 found:
3163         list_del(&codec->list);
3164         snd_soc_component_del_unlocked(&codec->component);
3165         mutex_unlock(&client_mutex);
3166 
3167         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3168                         codec->component.name);
3169 
3170         snd_soc_component_cleanup(&codec->component);
3171         snd_soc_cache_exit(codec);
3172         kfree(codec);
3173 }
3174 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3175 
3176 /* Retrieve a card's name from device tree */
3177 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3178                                const char *propname)
3179 {
3180         struct device_node *np;
3181         int ret;
3182 
3183         if (!card->dev) {
3184                 pr_err("card->dev is not set before calling %s\n", __func__);
3185                 return -EINVAL;
3186         }
3187 
3188         np = card->dev->of_node;
3189 
3190         ret = of_property_read_string_index(np, propname, 0, &card->name);
3191         /*
3192          * EINVAL means the property does not exist. This is fine providing
3193          * card->name was previously set, which is checked later in
3194          * snd_soc_register_card.
3195          */
3196         if (ret < 0 && ret != -EINVAL) {
3197                 dev_err(card->dev,
3198                         "ASoC: Property '%s' could not be read: %d\n",
3199                         propname, ret);
3200                 return ret;
3201         }
3202 
3203         return 0;
3204 }
3205 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3206 
3207 static const struct snd_soc_dapm_widget simple_widgets[] = {
3208         SND_SOC_DAPM_MIC("Microphone", NULL),
3209         SND_SOC_DAPM_LINE("Line", NULL),
3210         SND_SOC_DAPM_HP("Headphone", NULL),
3211         SND_SOC_DAPM_SPK("Speaker", NULL),
3212 };
3213 
3214 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3215                                           const char *propname)
3216 {
3217         struct device_node *np = card->dev->of_node;
3218         struct snd_soc_dapm_widget *widgets;
3219         const char *template, *wname;
3220         int i, j, num_widgets, ret;
3221 
3222         num_widgets = of_property_count_strings(np, propname);
3223         if (num_widgets < 0) {
3224                 dev_err(card->dev,
3225                         "ASoC: Property '%s' does not exist\n", propname);
3226                 return -EINVAL;
3227         }
3228         if (num_widgets & 1) {
3229                 dev_err(card->dev,
3230                         "ASoC: Property '%s' length is not even\n", propname);
3231                 return -EINVAL;
3232         }
3233 
3234         num_widgets /= 2;
3235         if (!num_widgets) {
3236                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3237                         propname);
3238                 return -EINVAL;
3239         }
3240 
3241         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3242                                GFP_KERNEL);
3243         if (!widgets) {
3244                 dev_err(card->dev,
3245                         "ASoC: Could not allocate memory for widgets\n");
3246                 return -ENOMEM;
3247         }
3248 
3249         for (i = 0; i < num_widgets; i++) {
3250                 ret = of_property_read_string_index(np, propname,
3251                         2 * i, &template);
3252                 if (ret) {
3253                         dev_err(card->dev,
3254                                 "ASoC: Property '%s' index %d read error:%d\n",
3255                                 propname, 2 * i, ret);
3256                         return -EINVAL;
3257                 }
3258 
3259                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3260                         if (!strncmp(template, simple_widgets[j].name,
3261                                      strlen(simple_widgets[j].name))) {
3262                                 widgets[i] = simple_widgets[j];
3263                                 break;
3264                         }
3265                 }
3266 
3267                 if (j >= ARRAY_SIZE(simple_widgets)) {
3268                         dev_err(card->dev,
3269                                 "ASoC: DAPM widget '%s' is not supported\n",
3270                                 template);
3271                         return -EINVAL;
3272                 }
3273 
3274                 ret = of_property_read_string_index(np, propname,
3275                                                     (2 * i) + 1,
3276                                                     &wname);
3277                 if (ret) {
3278                         dev_err(card->dev,
3279                                 "ASoC: Property '%s' index %d read error:%d\n",
3280                                 propname, (2 * i) + 1, ret);
3281                         return -EINVAL;
3282                 }
3283 
3284                 widgets[i].name = wname;
3285         }
3286 
3287         card->of_dapm_widgets = widgets;
3288         card->num_of_dapm_widgets = num_widgets;
3289 
3290         return 0;
3291 }
3292 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3293 
3294 static int snd_soc_of_get_slot_mask(struct device_node *np,
3295                                     const char *prop_name,
3296                                     unsigned int *mask)
3297 {
3298         u32 val;
3299         const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3300         int i;
3301 
3302         if (!of_slot_mask)
3303                 return 0;
3304         val /= sizeof(u32);
3305         for (i = 0; i < val; i++)
3306                 if (be32_to_cpup(&of_slot_mask[i]))
3307                         *mask |= (1 << i);
3308 
3309         return val;
3310 }
3311 
3312 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3313                               unsigned int *tx_mask,
3314                               unsigned int *rx_mask,
3315                               unsigned int *slots,
3316                               unsigned int *slot_width)
3317 {
3318         u32 val;
3319         int ret;
3320 
3321         if (tx_mask)
3322                 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3323         if (rx_mask)
3324                 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3325 
3326         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3327                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3328                 if (ret)
3329                         return ret;
3330 
3331                 if (slots)
3332                         *slots = val;
3333         }
3334 
3335         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3336                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3337                 if (ret)
3338                         return ret;
3339 
3340                 if (slot_width)
3341                         *slot_width = val;
3342         }
3343 
3344         return 0;
3345 }
3346 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3347 
3348 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
3349                                    struct snd_soc_codec_conf *codec_conf,
3350                                    struct device_node *of_node,
3351                                    const char *propname)
3352 {
3353         struct device_node *np = card->dev->of_node;
3354         const char *str;
3355         int ret;
3356 
3357         ret = of_property_read_string(np, propname, &str);
3358         if (ret < 0) {
3359                 /* no prefix is not error */
3360                 return;
3361         }
3362 
3363         codec_conf->of_node     = of_node;
3364         codec_conf->name_prefix = str;
3365 }
3366 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
3367 
3368 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3369                                    const char *propname)
3370 {
3371         struct device_node *np = card->dev->of_node;
3372         int num_routes;
3373         struct snd_soc_dapm_route *routes;
3374         int i, ret;
3375 
3376         num_routes = of_property_count_strings(np, propname);
3377         if (num_routes < 0 || num_routes & 1) {
3378                 dev_err(card->dev,
3379                         "ASoC: Property '%s' does not exist or its length is not even\n",
3380                         propname);
3381                 return -EINVAL;
3382         }
3383         num_routes /= 2;
3384         if (!num_routes) {
3385                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3386                         propname);
3387                 return -EINVAL;
3388         }
3389 
3390         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3391                               GFP_KERNEL);
3392         if (!routes) {
3393                 dev_err(card->dev,
3394                         "ASoC: Could not allocate DAPM route table\n");
3395                 return -EINVAL;
3396         }
3397 
3398         for (i = 0; i < num_routes; i++) {
3399                 ret = of_property_read_string_index(np, propname,
3400                         2 * i, &routes[i].sink);
3401                 if (ret) {
3402                         dev_err(card->dev,
3403                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3404                                 propname, 2 * i, ret);
3405                         return -EINVAL;
3406                 }
3407                 ret = of_property_read_string_index(np, propname,
3408                         (2 * i) + 1, &routes[i].source);
3409                 if (ret) {
3410                         dev_err(card->dev,
3411                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3412                                 propname, (2 * i) + 1, ret);
3413                         return -EINVAL;
3414                 }
3415         }
3416 
3417         card->num_of_dapm_routes = num_routes;
3418         card->of_dapm_routes = routes;
3419 
3420         return 0;
3421 }
3422 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3423 
3424 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3425                                      const char *prefix,
3426                                      struct device_node **bitclkmaster,
3427                                      struct device_node **framemaster)
3428 {
3429         int ret, i;
3430         char prop[128];
3431         unsigned int format = 0;
3432         int bit, frame;
3433         const char *str;
3434         struct {
3435                 char *name;
3436                 unsigned int val;
3437         } of_fmt_table[] = {
3438                 { "i2s",        SND_SOC_DAIFMT_I2S },
3439                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
3440                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
3441                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
3442                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
3443                 { "ac97",       SND_SOC_DAIFMT_AC97 },
3444                 { "pdm",        SND_SOC_DAIFMT_PDM},
3445                 { "msb",        SND_SOC_DAIFMT_MSB },
3446                 { "lsb",        SND_SOC_DAIFMT_LSB },
3447         };
3448 
3449         if (!prefix)
3450                 prefix = "";
3451 
3452         /*
3453          * check "[prefix]format = xxx"
3454          * SND_SOC_DAIFMT_FORMAT_MASK area
3455          */
3456         snprintf(prop, sizeof(prop), "%sformat", prefix);
3457         ret = of_property_read_string(np, prop, &str);
3458         if (ret == 0) {
3459                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3460                         if (strcmp(str, of_fmt_table[i].name) == 0) {
3461                                 format |= of_fmt_table[i].val;
3462                                 break;
3463                         }
3464                 }
3465         }
3466 
3467         /*
3468          * check "[prefix]continuous-clock"
3469          * SND_SOC_DAIFMT_CLOCK_MASK area
3470          */
3471         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3472         if (of_get_property(np, prop, NULL))
3473                 format |= SND_SOC_DAIFMT_CONT;
3474         else
3475                 format |= SND_SOC_DAIFMT_GATED;
3476 
3477         /*
3478          * check "[prefix]bitclock-inversion"
3479          * check "[prefix]frame-inversion"
3480          * SND_SOC_DAIFMT_INV_MASK area
3481          */
3482         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3483         bit = !!of_get_property(np, prop, NULL);
3484 
3485         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3486         frame = !!of_get_property(np, prop, NULL);
3487 
3488         switch ((bit << 4) + frame) {
3489         case 0x11:
3490                 format |= SND_SOC_DAIFMT_IB_IF;
3491                 break;
3492         case 0x10:
3493                 format |= SND_SOC_DAIFMT_IB_NF;
3494                 break;
3495         case 0x01:
3496                 format |= SND_SOC_DAIFMT_NB_IF;
3497                 break;
3498         default:
3499                 /* SND_SOC_DAIFMT_NB_NF is default */
3500                 break;
3501         }
3502 
3503         /*
3504          * check "[prefix]bitclock-master"
3505          * check "[prefix]frame-master"
3506          * SND_SOC_DAIFMT_MASTER_MASK area
3507          */
3508         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3509         bit = !!of_get_property(np, prop, NULL);
3510         if (bit && bitclkmaster)
3511                 *bitclkmaster = of_parse_phandle(np, prop, 0);
3512 
3513         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3514         frame = !!of_get_property(np, prop, NULL);
3515         if (frame && framemaster)
3516                 *framemaster = of_parse_phandle(np, prop, 0);
3517 
3518         switch ((bit << 4) + frame) {
3519         case 0x11:
3520                 format |= SND_SOC_DAIFMT_CBM_CFM;
3521                 break;
3522         case 0x10:
3523                 format |= SND_SOC_DAIFMT_CBM_CFS;
3524                 break;
3525         case 0x01:
3526                 format |= SND_SOC_DAIFMT_CBS_CFM;
3527                 break;
3528         default:
3529                 format |= SND_SOC_DAIFMT_CBS_CFS;
3530                 break;
3531         }
3532 
3533         return format;
3534 }
3535 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3536 
3537 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3538                                 const char **dai_name)
3539 {
3540         struct snd_soc_component *pos;
3541         struct device_node *component_of_node;
3542         int ret = -EPROBE_DEFER;
3543 
3544         mutex_lock(&client_mutex);
3545         list_for_each_entry(pos, &component_list, list) {
3546                 component_of_node = pos->dev->of_node;
3547                 if (!component_of_node && pos->dev->parent)
3548                         component_of_node = pos->dev->parent->of_node;
3549 
3550                 if (component_of_node != args->np)
3551                         continue;
3552 
3553                 if (pos->driver->of_xlate_dai_name) {
3554                         ret = pos->driver->of_xlate_dai_name(pos,
3555                                                              args,
3556                                                              dai_name);
3557                 } else {
3558                         int id = -1;
3559 
3560                         switch (args->args_count) {
3561                         case 0:
3562                                 id = 0; /* same as dai_drv[0] */
3563                                 break;
3564                         case 1:
3565                                 id = args->args[0];
3566                                 break;
3567                         default:
3568                                 /* not supported */
3569                                 break;
3570                         }
3571 
3572                         if (id < 0 || id >= pos->num_dai) {
3573                                 ret = -EINVAL;
3574                                 continue;
3575                         }
3576 
3577                         ret = 0;
3578 
3579                         *dai_name = pos->dai_drv[id].name;
3580                         if (!*dai_name)
3581                                 *dai_name = pos->name;
3582                 }
3583 
3584                 break;
3585         }
3586         mutex_unlock(&client_mutex);
3587         return ret;
3588 }
3589 
3590 int snd_soc_of_get_dai_name(struct device_node *of_node,
3591                             const char **dai_name)
3592 {
3593         struct of_phandle_args args;
3594         int ret;
3595 
3596         ret = of_parse_phandle_with_args(of_node, "sound-dai",
3597                                          "#sound-dai-cells", 0, &args);
3598         if (ret)
3599                 return ret;
3600 
3601         ret = snd_soc_get_dai_name(&args, dai_name);
3602 
3603         of_node_put(args.np);
3604 
3605         return ret;
3606 }
3607 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3608 
3609 /*
3610  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3611  * @dev: Card device
3612  * @of_node: Device node
3613  * @dai_link: DAI link
3614  *
3615  * Builds an array of CODEC DAI components from the DAI link property
3616  * 'sound-dai'.
3617  * The array is set in the DAI link and the number of DAIs is set accordingly.
3618  * The device nodes in the array (of_node) must be dereferenced by the caller.
3619  *
3620  * Returns 0 for success
3621  */
3622 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3623                                    struct device_node *of_node,
3624                                    struct snd_soc_dai_link *dai_link)
3625 {
3626         struct of_phandle_args args;
3627         struct snd_soc_dai_link_component *component;
3628         char *name;
3629         int index, num_codecs, ret;
3630 
3631         /* Count the number of CODECs */
3632         name = "sound-dai";
3633         num_codecs = of_count_phandle_with_args(of_node, name,
3634                                                 "#sound-dai-cells");
3635         if (num_codecs <= 0) {
3636                 if (num_codecs == -ENOENT)
3637                         dev_err(dev, "No 'sound-dai' property\n");
3638                 else
3639                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
3640                 return num_codecs;
3641         }
3642         component = devm_kzalloc(dev,
3643                                  sizeof *component * num_codecs,
3644                                  GFP_KERNEL);
3645         if (!component)
3646                 return -ENOMEM;
3647         dai_link->codecs = component;
3648         dai_link->num_codecs = num_codecs;
3649 
3650         /* Parse the list */
3651         for (index = 0, component = dai_link->codecs;
3652              index < dai_link->num_codecs;
3653              index++, component++) {
3654                 ret = of_parse_phandle_with_args(of_node, name,
3655                                                  "#sound-dai-cells",
3656                                                   index, &args);
3657                 if (ret)
3658                         goto err;
3659                 component->of_node = args.np;
3660                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3661                 if (ret < 0)
3662                         goto err;
3663         }
3664         return 0;
3665 err:
3666         for (index = 0, component = dai_link->codecs;
3667              index < dai_link->num_codecs;
3668              index++, component++) {
3669                 if (!component->of_node)
3670                         break;
3671                 of_node_put(component->of_node);
3672                 component->of_node = NULL;
3673         }
3674         dai_link->codecs = NULL;
3675         dai_link->num_codecs = 0;
3676         return ret;
3677 }
3678 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3679 
3680 static int __init snd_soc_init(void)
3681 {
3682         snd_soc_debugfs_init();
3683         snd_soc_util_init();
3684 
3685         return platform_driver_register(&soc_driver);
3686 }
3687 module_init(snd_soc_init);
3688 
3689 static void __exit snd_soc_exit(void)
3690 {
3691         snd_soc_util_exit();
3692         snd_soc_debugfs_exit();
3693 
3694 #ifdef CONFIG_DEBUG_FS
3695 #endif
3696         platform_driver_unregister(&soc_driver);
3697 }
3698 module_exit(snd_soc_exit);
3699 
3700 /* Module information */
3701 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3702 MODULE_DESCRIPTION("ALSA SoC Core");
3703 MODULE_LICENSE("GPL");
3704 MODULE_ALIAS("platform:soc-audio");
3705 

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