Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 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

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

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