Version:  2.0.40 2.2.26 2.4.37 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 4.1

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->card->debugfs_card_root)
296                 return;
297 
298         if (component->debugfs_prefix) {
299                 char *name;
300 
301                 name = kasprintf(GFP_KERNEL, "%s:%s",
302                         component->debugfs_prefix, component->name);
303                 if (name) {
304                         component->debugfs_root = debugfs_create_dir(name,
305                                 component->card->debugfs_card_root);
306                         kfree(name);
307                 }
308         } else {
309                 component->debugfs_root = debugfs_create_dir(component->name,
310                                 component->card->debugfs_card_root);
311         }
312 
313         if (!component->debugfs_root) {
314                 dev_warn(component->dev,
315                         "ASoC: Failed to create component debugfs directory\n");
316                 return;
317         }
318 
319         snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
320                 component->debugfs_root);
321 
322         if (component->init_debugfs)
323                 component->init_debugfs(component);
324 }
325 
326 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
327 {
328         debugfs_remove_recursive(component->debugfs_root);
329 }
330 
331 static void soc_init_codec_debugfs(struct snd_soc_component *component)
332 {
333         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
334 
335         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
336                                                  codec->component.debugfs_root,
337                                                  codec, &codec_reg_fops);
338         if (!codec->debugfs_reg)
339                 dev_warn(codec->dev,
340                         "ASoC: Failed to create codec register debugfs file\n");
341 }
342 
343 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
344                                     size_t count, loff_t *ppos)
345 {
346         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
347         ssize_t len, ret = 0;
348         struct snd_soc_codec *codec;
349 
350         if (!buf)
351                 return -ENOMEM;
352 
353         mutex_lock(&client_mutex);
354 
355         list_for_each_entry(codec, &codec_list, list) {
356                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
357                                codec->component.name);
358                 if (len >= 0)
359                         ret += len;
360                 if (ret > PAGE_SIZE) {
361                         ret = PAGE_SIZE;
362                         break;
363                 }
364         }
365 
366         mutex_unlock(&client_mutex);
367 
368         if (ret >= 0)
369                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
370 
371         kfree(buf);
372 
373         return ret;
374 }
375 
376 static const struct file_operations codec_list_fops = {
377         .read = codec_list_read_file,
378         .llseek = default_llseek,/* read accesses f_pos */
379 };
380 
381 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
382                                   size_t count, loff_t *ppos)
383 {
384         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
385         ssize_t len, ret = 0;
386         struct snd_soc_component *component;
387         struct snd_soc_dai *dai;
388 
389         if (!buf)
390                 return -ENOMEM;
391 
392         mutex_lock(&client_mutex);
393 
394         list_for_each_entry(component, &component_list, list) {
395                 list_for_each_entry(dai, &component->dai_list, list) {
396                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
397                                 dai->name);
398                         if (len >= 0)
399                                 ret += len;
400                         if (ret > PAGE_SIZE) {
401                                 ret = PAGE_SIZE;
402                                 break;
403                         }
404                 }
405         }
406 
407         mutex_unlock(&client_mutex);
408 
409         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
410 
411         kfree(buf);
412 
413         return ret;
414 }
415 
416 static const struct file_operations dai_list_fops = {
417         .read = dai_list_read_file,
418         .llseek = default_llseek,/* read accesses f_pos */
419 };
420 
421 static ssize_t platform_list_read_file(struct file *file,
422                                        char __user *user_buf,
423                                        size_t count, loff_t *ppos)
424 {
425         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
426         ssize_t len, ret = 0;
427         struct snd_soc_platform *platform;
428 
429         if (!buf)
430                 return -ENOMEM;
431 
432         mutex_lock(&client_mutex);
433 
434         list_for_each_entry(platform, &platform_list, list) {
435                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
436                                platform->component.name);
437                 if (len >= 0)
438                         ret += len;
439                 if (ret > PAGE_SIZE) {
440                         ret = PAGE_SIZE;
441                         break;
442                 }
443         }
444 
445         mutex_unlock(&client_mutex);
446 
447         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
448 
449         kfree(buf);
450 
451         return ret;
452 }
453 
454 static const struct file_operations platform_list_fops = {
455         .read = platform_list_read_file,
456         .llseek = default_llseek,/* read accesses f_pos */
457 };
458 
459 static void soc_init_card_debugfs(struct snd_soc_card *card)
460 {
461         if (!snd_soc_debugfs_root)
462                 return;
463 
464         card->debugfs_card_root = debugfs_create_dir(card->name,
465                                                      snd_soc_debugfs_root);
466         if (!card->debugfs_card_root) {
467                 dev_warn(card->dev,
468                          "ASoC: Failed to create card debugfs directory\n");
469                 return;
470         }
471 
472         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
473                                                     card->debugfs_card_root,
474                                                     &card->pop_time);
475         if (!card->debugfs_pop_time)
476                 dev_warn(card->dev,
477                        "ASoC: Failed to create pop time debugfs file\n");
478 }
479 
480 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
481 {
482         debugfs_remove_recursive(card->debugfs_card_root);
483 }
484 
485 
486 static void snd_soc_debugfs_init(void)
487 {
488         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
489         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
490                 pr_warn("ASoC: Failed to create debugfs directory\n");
491                 snd_soc_debugfs_root = NULL;
492                 return;
493         }
494 
495         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
496                                  &codec_list_fops))
497                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
498 
499         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
500                                  &dai_list_fops))
501                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
502 
503         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
504                                  &platform_list_fops))
505                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
506 }
507 
508 static void snd_soc_debugfs_exit(void)
509 {
510         debugfs_remove_recursive(snd_soc_debugfs_root);
511 }
512 
513 #else
514 
515 #define soc_init_codec_debugfs NULL
516 
517 static inline void soc_init_component_debugfs(
518         struct snd_soc_component *component)
519 {
520 }
521 
522 static inline void soc_cleanup_component_debugfs(
523         struct snd_soc_component *component)
524 {
525 }
526 
527 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
528 {
529 }
530 
531 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
532 {
533 }
534 
535 static inline void snd_soc_debugfs_init(void)
536 {
537 }
538 
539 static inline void snd_soc_debugfs_exit(void)
540 {
541 }
542 
543 #endif
544 
545 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
546                 const char *dai_link, int stream)
547 {
548         int i;
549 
550         for (i = 0; i < card->num_links; i++) {
551                 if (card->rtd[i].dai_link->no_pcm &&
552                         !strcmp(card->rtd[i].dai_link->name, dai_link))
553                         return card->rtd[i].pcm->streams[stream].substream;
554         }
555         dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
556         return NULL;
557 }
558 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
559 
560 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
561                 const char *dai_link)
562 {
563         int i;
564 
565         for (i = 0; i < card->num_links; i++) {
566                 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
567                         return &card->rtd[i];
568         }
569         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
570         return NULL;
571 }
572 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
573 
574 static void codec2codec_close_delayed_work(struct work_struct *work)
575 {
576         /* Currently nothing to do for c2c links
577          * Since c2c links are internal nodes in the DAPM graph and
578          * don't interface with the outside world or application layer
579          * we don't have to do any special handling on close.
580          */
581 }
582 
583 #ifdef CONFIG_PM_SLEEP
584 /* powers down audio subsystem for suspend */
585 int snd_soc_suspend(struct device *dev)
586 {
587         struct snd_soc_card *card = dev_get_drvdata(dev);
588         struct snd_soc_codec *codec;
589         int i, j;
590 
591         /* If the card is not initialized yet there is nothing to do */
592         if (!card->instantiated)
593                 return 0;
594 
595         /* Due to the resume being scheduled into a workqueue we could
596         * suspend before that's finished - wait for it to complete.
597          */
598         snd_power_lock(card->snd_card);
599         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
600         snd_power_unlock(card->snd_card);
601 
602         /* we're going to block userspace touching us until resume completes */
603         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
604 
605         /* mute any active DACs */
606         for (i = 0; i < card->num_rtd; i++) {
607 
608                 if (card->rtd[i].dai_link->ignore_suspend)
609                         continue;
610 
611                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
612                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
613                         struct snd_soc_dai_driver *drv = dai->driver;
614 
615                         if (drv->ops->digital_mute && dai->playback_active)
616                                 drv->ops->digital_mute(dai, 1);
617                 }
618         }
619 
620         /* suspend all pcms */
621         for (i = 0; i < card->num_rtd; i++) {
622                 if (card->rtd[i].dai_link->ignore_suspend)
623                         continue;
624 
625                 snd_pcm_suspend_all(card->rtd[i].pcm);
626         }
627 
628         if (card->suspend_pre)
629                 card->suspend_pre(card);
630 
631         for (i = 0; i < card->num_rtd; i++) {
632                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
633 
634                 if (card->rtd[i].dai_link->ignore_suspend)
635                         continue;
636 
637                 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
638                         cpu_dai->driver->suspend(cpu_dai);
639         }
640 
641         /* close any waiting streams */
642         for (i = 0; i < card->num_rtd; i++)
643                 flush_delayed_work(&card->rtd[i].delayed_work);
644 
645         for (i = 0; i < card->num_rtd; i++) {
646 
647                 if (card->rtd[i].dai_link->ignore_suspend)
648                         continue;
649 
650                 snd_soc_dapm_stream_event(&card->rtd[i],
651                                           SNDRV_PCM_STREAM_PLAYBACK,
652                                           SND_SOC_DAPM_STREAM_SUSPEND);
653 
654                 snd_soc_dapm_stream_event(&card->rtd[i],
655                                           SNDRV_PCM_STREAM_CAPTURE,
656                                           SND_SOC_DAPM_STREAM_SUSPEND);
657         }
658 
659         /* Recheck all endpoints too, their state is affected by suspend */
660         dapm_mark_endpoints_dirty(card);
661         snd_soc_dapm_sync(&card->dapm);
662 
663         /* suspend all CODECs */
664         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
665                 /* If there are paths active then the CODEC will be held with
666                  * bias _ON and should not be suspended. */
667                 if (!codec->suspended) {
668                         switch (codec->dapm.bias_level) {
669                         case SND_SOC_BIAS_STANDBY:
670                                 /*
671                                  * If the CODEC is capable of idle
672                                  * bias off then being in STANDBY
673                                  * means it's doing something,
674                                  * otherwise fall through.
675                                  */
676                                 if (codec->dapm.idle_bias_off) {
677                                         dev_dbg(codec->dev,
678                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
679                                         break;
680                                 }
681 
682                         case SND_SOC_BIAS_OFF:
683                                 if (codec->driver->suspend)
684                                         codec->driver->suspend(codec);
685                                 codec->suspended = 1;
686                                 if (codec->component.regmap)
687                                         regcache_mark_dirty(codec->component.regmap);
688                                 /* deactivate pins to sleep state */
689                                 pinctrl_pm_select_sleep_state(codec->dev);
690                                 break;
691                         default:
692                                 dev_dbg(codec->dev,
693                                         "ASoC: CODEC is on over suspend\n");
694                                 break;
695                         }
696                 }
697         }
698 
699         for (i = 0; i < card->num_rtd; i++) {
700                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
701 
702                 if (card->rtd[i].dai_link->ignore_suspend)
703                         continue;
704 
705                 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
706                         cpu_dai->driver->suspend(cpu_dai);
707 
708                 /* deactivate pins to sleep state */
709                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
710         }
711 
712         if (card->suspend_post)
713                 card->suspend_post(card);
714 
715         return 0;
716 }
717 EXPORT_SYMBOL_GPL(snd_soc_suspend);
718 
719 /* deferred resume work, so resume can complete before we finished
720  * setting our codec back up, which can be very slow on I2C
721  */
722 static void soc_resume_deferred(struct work_struct *work)
723 {
724         struct snd_soc_card *card =
725                         container_of(work, struct snd_soc_card, deferred_resume_work);
726         struct snd_soc_codec *codec;
727         int i, j;
728 
729         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
730          * so userspace apps are blocked from touching us
731          */
732 
733         dev_dbg(card->dev, "ASoC: starting resume work\n");
734 
735         /* Bring us up into D2 so that DAPM starts enabling things */
736         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
737 
738         if (card->resume_pre)
739                 card->resume_pre(card);
740 
741         /* resume control bus DAIs */
742         for (i = 0; i < card->num_rtd; i++) {
743                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
744 
745                 if (card->rtd[i].dai_link->ignore_suspend)
746                         continue;
747 
748                 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
749                         cpu_dai->driver->resume(cpu_dai);
750         }
751 
752         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
753                 /* If the CODEC was idle over suspend then it will have been
754                  * left with bias OFF or STANDBY and suspended so we must now
755                  * resume.  Otherwise the suspend was suppressed.
756                  */
757                 if (codec->suspended) {
758                         switch (codec->dapm.bias_level) {
759                         case SND_SOC_BIAS_STANDBY:
760                         case SND_SOC_BIAS_OFF:
761                                 if (codec->driver->resume)
762                                         codec->driver->resume(codec);
763                                 codec->suspended = 0;
764                                 break;
765                         default:
766                                 dev_dbg(codec->dev,
767                                         "ASoC: CODEC was on over suspend\n");
768                                 break;
769                         }
770                 }
771         }
772 
773         for (i = 0; i < card->num_rtd; i++) {
774 
775                 if (card->rtd[i].dai_link->ignore_suspend)
776                         continue;
777 
778                 snd_soc_dapm_stream_event(&card->rtd[i],
779                                           SNDRV_PCM_STREAM_PLAYBACK,
780                                           SND_SOC_DAPM_STREAM_RESUME);
781 
782                 snd_soc_dapm_stream_event(&card->rtd[i],
783                                           SNDRV_PCM_STREAM_CAPTURE,
784                                           SND_SOC_DAPM_STREAM_RESUME);
785         }
786 
787         /* unmute any active DACs */
788         for (i = 0; i < card->num_rtd; i++) {
789 
790                 if (card->rtd[i].dai_link->ignore_suspend)
791                         continue;
792 
793                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
794                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
795                         struct snd_soc_dai_driver *drv = dai->driver;
796 
797                         if (drv->ops->digital_mute && dai->playback_active)
798                                 drv->ops->digital_mute(dai, 0);
799                 }
800         }
801 
802         for (i = 0; i < card->num_rtd; i++) {
803                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
804 
805                 if (card->rtd[i].dai_link->ignore_suspend)
806                         continue;
807 
808                 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
809                         cpu_dai->driver->resume(cpu_dai);
810         }
811 
812         if (card->resume_post)
813                 card->resume_post(card);
814 
815         dev_dbg(card->dev, "ASoC: resume work completed\n");
816 
817         /* userspace can access us now we are back as we were before */
818         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
819 
820         /* Recheck all endpoints too, their state is affected by suspend */
821         dapm_mark_endpoints_dirty(card);
822         snd_soc_dapm_sync(&card->dapm);
823 }
824 
825 /* powers up audio subsystem after a suspend */
826 int snd_soc_resume(struct device *dev)
827 {
828         struct snd_soc_card *card = dev_get_drvdata(dev);
829         bool bus_control = false;
830         int i;
831 
832         /* If the card is not initialized yet there is nothing to do */
833         if (!card->instantiated)
834                 return 0;
835 
836         /* activate pins from sleep state */
837         for (i = 0; i < card->num_rtd; i++) {
838                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
839                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
840                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
841                 int j;
842 
843                 if (cpu_dai->active)
844                         pinctrl_pm_select_default_state(cpu_dai->dev);
845 
846                 for (j = 0; j < rtd->num_codecs; j++) {
847                         struct snd_soc_dai *codec_dai = codec_dais[j];
848                         if (codec_dai->active)
849                                 pinctrl_pm_select_default_state(codec_dai->dev);
850                 }
851         }
852 
853         /*
854          * DAIs that also act as the control bus master might have other drivers
855          * hanging off them so need to resume immediately. Other drivers don't
856          * have that problem and may take a substantial amount of time to resume
857          * due to I/O costs and anti-pop so handle them out of line.
858          */
859         for (i = 0; i < card->num_rtd; i++) {
860                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
861                 bus_control |= cpu_dai->driver->bus_control;
862         }
863         if (bus_control) {
864                 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
865                 soc_resume_deferred(&card->deferred_resume_work);
866         } else {
867                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
868                 if (!schedule_work(&card->deferred_resume_work))
869                         dev_err(dev, "ASoC: resume work item may be lost\n");
870         }
871 
872         return 0;
873 }
874 EXPORT_SYMBOL_GPL(snd_soc_resume);
875 #else
876 #define snd_soc_suspend NULL
877 #define snd_soc_resume NULL
878 #endif
879 
880 static const struct snd_soc_dai_ops null_dai_ops = {
881 };
882 
883 static struct snd_soc_component *soc_find_component(
884         const struct device_node *of_node, const char *name)
885 {
886         struct snd_soc_component *component;
887 
888         lockdep_assert_held(&client_mutex);
889 
890         list_for_each_entry(component, &component_list, list) {
891                 if (of_node) {
892                         if (component->dev->of_node == of_node)
893                                 return component;
894                 } else if (strcmp(component->name, name) == 0) {
895                         return component;
896                 }
897         }
898 
899         return NULL;
900 }
901 
902 static struct snd_soc_dai *snd_soc_find_dai(
903         const struct snd_soc_dai_link_component *dlc)
904 {
905         struct snd_soc_component *component;
906         struct snd_soc_dai *dai;
907 
908         lockdep_assert_held(&client_mutex);
909 
910         /* Find CPU DAI from registered DAIs*/
911         list_for_each_entry(component, &component_list, list) {
912                 if (dlc->of_node && component->dev->of_node != dlc->of_node)
913                         continue;
914                 if (dlc->name && strcmp(component->name, dlc->name))
915                         continue;
916                 list_for_each_entry(dai, &component->dai_list, list) {
917                         if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
918                                 continue;
919 
920                         return dai;
921                 }
922         }
923 
924         return NULL;
925 }
926 
927 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
928 {
929         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
930         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
931         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
932         struct snd_soc_dai_link_component cpu_dai_component;
933         struct snd_soc_dai **codec_dais = rtd->codec_dais;
934         struct snd_soc_platform *platform;
935         const char *platform_name;
936         int i;
937 
938         dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
939 
940         cpu_dai_component.name = dai_link->cpu_name;
941         cpu_dai_component.of_node = dai_link->cpu_of_node;
942         cpu_dai_component.dai_name = dai_link->cpu_dai_name;
943         rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
944         if (!rtd->cpu_dai) {
945                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
946                         dai_link->cpu_dai_name);
947                 return -EPROBE_DEFER;
948         }
949 
950         rtd->num_codecs = dai_link->num_codecs;
951 
952         /* Find CODEC from registered CODECs */
953         for (i = 0; i < rtd->num_codecs; i++) {
954                 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
955                 if (!codec_dais[i]) {
956                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
957                                 codecs[i].dai_name);
958                         return -EPROBE_DEFER;
959                 }
960         }
961 
962         /* Single codec links expect codec and codec_dai in runtime data */
963         rtd->codec_dai = codec_dais[0];
964         rtd->codec = rtd->codec_dai->codec;
965 
966         /* if there's no platform we match on the empty platform */
967         platform_name = dai_link->platform_name;
968         if (!platform_name && !dai_link->platform_of_node)
969                 platform_name = "snd-soc-dummy";
970 
971         /* find one from the set of registered platforms */
972         list_for_each_entry(platform, &platform_list, list) {
973                 if (dai_link->platform_of_node) {
974                         if (platform->dev->of_node !=
975                             dai_link->platform_of_node)
976                                 continue;
977                 } else {
978                         if (strcmp(platform->component.name, platform_name))
979                                 continue;
980                 }
981 
982                 rtd->platform = platform;
983         }
984         if (!rtd->platform) {
985                 dev_err(card->dev, "ASoC: platform %s not registered\n",
986                         dai_link->platform_name);
987                 return -EPROBE_DEFER;
988         }
989 
990         card->num_rtd++;
991 
992         return 0;
993 }
994 
995 static void soc_remove_component(struct snd_soc_component *component)
996 {
997         if (!component->probed)
998                 return;
999 
1000         /* This is a HACK and will be removed soon */
1001         if (component->codec)
1002                 list_del(&component->codec->card_list);
1003 
1004         if (component->remove)
1005                 component->remove(component);
1006 
1007         snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1008 
1009         soc_cleanup_component_debugfs(component);
1010         component->probed = 0;
1011         module_put(component->dev->driver->owner);
1012 }
1013 
1014 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1015 {
1016         int err;
1017 
1018         if (dai && dai->probed &&
1019                         dai->driver->remove_order == order) {
1020                 if (dai->driver->remove) {
1021                         err = dai->driver->remove(dai);
1022                         if (err < 0)
1023                                 dev_err(dai->dev,
1024                                         "ASoC: failed to remove %s: %d\n",
1025                                         dai->name, err);
1026                 }
1027                 dai->probed = 0;
1028         }
1029 }
1030 
1031 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1032 {
1033         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1034         int i;
1035 
1036         /* unregister the rtd device */
1037         if (rtd->dev_registered) {
1038                 device_unregister(rtd->dev);
1039                 rtd->dev_registered = 0;
1040         }
1041 
1042         /* remove the CODEC DAI */
1043         for (i = 0; i < rtd->num_codecs; i++)
1044                 soc_remove_dai(rtd->codec_dais[i], order);
1045 
1046         soc_remove_dai(rtd->cpu_dai, order);
1047 }
1048 
1049 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1050                                        int order)
1051 {
1052         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1053         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1054         struct snd_soc_platform *platform = rtd->platform;
1055         struct snd_soc_component *component;
1056         int i;
1057 
1058         /* remove the platform */
1059         if (platform && platform->component.driver->remove_order == order)
1060                 soc_remove_component(&platform->component);
1061 
1062         /* remove the CODEC-side CODEC */
1063         for (i = 0; i < rtd->num_codecs; i++) {
1064                 component = rtd->codec_dais[i]->component;
1065                 if (component->driver->remove_order == order)
1066                         soc_remove_component(component);
1067         }
1068 
1069         /* remove any CPU-side CODEC */
1070         if (cpu_dai) {
1071                 if (cpu_dai->component->driver->remove_order == order)
1072                         soc_remove_component(cpu_dai->component);
1073         }
1074 }
1075 
1076 static void soc_remove_dai_links(struct snd_soc_card *card)
1077 {
1078         int dai, order;
1079 
1080         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1081                         order++) {
1082                 for (dai = 0; dai < card->num_rtd; dai++)
1083                         soc_remove_link_dais(card, dai, order);
1084         }
1085 
1086         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1087                         order++) {
1088                 for (dai = 0; dai < card->num_rtd; dai++)
1089                         soc_remove_link_components(card, dai, order);
1090         }
1091 
1092         card->num_rtd = 0;
1093 }
1094 
1095 static void soc_set_name_prefix(struct snd_soc_card *card,
1096                                 struct snd_soc_component *component)
1097 {
1098         int i;
1099 
1100         if (card->codec_conf == NULL)
1101                 return;
1102 
1103         for (i = 0; i < card->num_configs; i++) {
1104                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1105                 if (map->of_node && component->dev->of_node != map->of_node)
1106                         continue;
1107                 if (map->dev_name && strcmp(component->name, map->dev_name))
1108                         continue;
1109                 component->name_prefix = map->name_prefix;
1110                 break;
1111         }
1112 }
1113 
1114 static int soc_probe_component(struct snd_soc_card *card,
1115         struct snd_soc_component *component)
1116 {
1117         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1118         struct snd_soc_dai *dai;
1119         int ret;
1120 
1121         if (component->probed)
1122                 return 0;
1123 
1124         component->card = card;
1125         dapm->card = card;
1126         soc_set_name_prefix(card, component);
1127 
1128         if (!try_module_get(component->dev->driver->owner))
1129                 return -ENODEV;
1130 
1131         soc_init_component_debugfs(component);
1132 
1133         if (component->dapm_widgets) {
1134                 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1135                         component->num_dapm_widgets);
1136 
1137                 if (ret != 0) {
1138                         dev_err(component->dev,
1139                                 "Failed to create new controls %d\n", ret);
1140                         goto err_probe;
1141                 }
1142         }
1143 
1144         list_for_each_entry(dai, &component->dai_list, list) {
1145                 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1146                 if (ret != 0) {
1147                         dev_err(component->dev,
1148                                 "Failed to create DAI widgets %d\n", ret);
1149                         goto err_probe;
1150                 }
1151         }
1152 
1153         if (component->probe) {
1154                 ret = component->probe(component);
1155                 if (ret < 0) {
1156                         dev_err(component->dev,
1157                                 "ASoC: failed to probe component %d\n", ret);
1158                         goto err_probe;
1159                 }
1160 
1161                 WARN(dapm->idle_bias_off &&
1162                         dapm->bias_level != SND_SOC_BIAS_OFF,
1163                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1164                         component->name);
1165         }
1166 
1167         if (component->controls)
1168                 snd_soc_add_component_controls(component, component->controls,
1169                                      component->num_controls);
1170         if (component->dapm_routes)
1171                 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1172                                         component->num_dapm_routes);
1173 
1174         component->probed = 1;
1175         list_add(&dapm->list, &card->dapm_list);
1176 
1177         /* This is a HACK and will be removed soon */
1178         if (component->codec)
1179                 list_add(&component->codec->card_list, &card->codec_dev_list);
1180 
1181         return 0;
1182 
1183 err_probe:
1184         soc_cleanup_component_debugfs(component);
1185         module_put(component->dev->driver->owner);
1186 
1187         return ret;
1188 }
1189 
1190 static void rtd_release(struct device *dev)
1191 {
1192         kfree(dev);
1193 }
1194 
1195 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1196         const char *name)
1197 {
1198         int ret = 0;
1199 
1200         /* register the rtd device */
1201         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1202         if (!rtd->dev)
1203                 return -ENOMEM;
1204         device_initialize(rtd->dev);
1205         rtd->dev->parent = rtd->card->dev;
1206         rtd->dev->release = rtd_release;
1207         rtd->dev->groups = soc_dev_attr_groups;
1208         dev_set_name(rtd->dev, "%s", name);
1209         dev_set_drvdata(rtd->dev, rtd);
1210         mutex_init(&rtd->pcm_mutex);
1211         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1212         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1213         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1214         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1215         ret = device_add(rtd->dev);
1216         if (ret < 0) {
1217                 /* calling put_device() here to free the rtd->dev */
1218                 put_device(rtd->dev);
1219                 dev_err(rtd->card->dev,
1220                         "ASoC: failed to register runtime device: %d\n", ret);
1221                 return ret;
1222         }
1223         rtd->dev_registered = 1;
1224         return 0;
1225 }
1226 
1227 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1228                                      int order)
1229 {
1230         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1231         struct snd_soc_platform *platform = rtd->platform;
1232         struct snd_soc_component *component;
1233         int i, ret;
1234 
1235         /* probe the CPU-side component, if it is a CODEC */
1236         component = rtd->cpu_dai->component;
1237         if (component->driver->probe_order == order) {
1238                 ret = soc_probe_component(card, component);
1239                 if (ret < 0)
1240                         return ret;
1241         }
1242 
1243         /* probe the CODEC-side components */
1244         for (i = 0; i < rtd->num_codecs; i++) {
1245                 component = rtd->codec_dais[i]->component;
1246                 if (component->driver->probe_order == order) {
1247                         ret = soc_probe_component(card, component);
1248                         if (ret < 0)
1249                                 return ret;
1250                 }
1251         }
1252 
1253         /* probe the platform */
1254         if (platform->component.driver->probe_order == order) {
1255                 ret = soc_probe_component(card, &platform->component);
1256                 if (ret < 0)
1257                         return ret;
1258         }
1259 
1260         return 0;
1261 }
1262 
1263 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1264 {
1265         int ret;
1266 
1267         if (!dai->probed && dai->driver->probe_order == order) {
1268                 if (dai->driver->probe) {
1269                         ret = dai->driver->probe(dai);
1270                         if (ret < 0) {
1271                                 dev_err(dai->dev,
1272                                         "ASoC: failed to probe DAI %s: %d\n",
1273                                         dai->name, ret);
1274                                 return ret;
1275                         }
1276                 }
1277 
1278                 dai->probed = 1;
1279         }
1280 
1281         return 0;
1282 }
1283 
1284 static int soc_link_dai_widgets(struct snd_soc_card *card,
1285                                 struct snd_soc_dai_link *dai_link,
1286                                 struct snd_soc_pcm_runtime *rtd)
1287 {
1288         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1289         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1290         struct snd_soc_dapm_widget *play_w, *capture_w;
1291         int ret;
1292 
1293         if (rtd->num_codecs > 1)
1294                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1295 
1296         /* link the DAI widgets */
1297         play_w = codec_dai->playback_widget;
1298         capture_w = cpu_dai->capture_widget;
1299         if (play_w && capture_w) {
1300                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1301                                            dai_link->num_params, capture_w,
1302                                            play_w);
1303                 if (ret != 0) {
1304                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1305                                 play_w->name, capture_w->name, ret);
1306                         return ret;
1307                 }
1308         }
1309 
1310         play_w = cpu_dai->playback_widget;
1311         capture_w = codec_dai->capture_widget;
1312         if (play_w && capture_w) {
1313                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1314                                            dai_link->num_params, capture_w,
1315                                            play_w);
1316                 if (ret != 0) {
1317                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1318                                 play_w->name, capture_w->name, ret);
1319                         return ret;
1320                 }
1321         }
1322 
1323         return 0;
1324 }
1325 
1326 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1327 {
1328         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1329         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1330         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1331         int i, ret;
1332 
1333         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1334                         card->name, num, order);
1335 
1336         /* set default power off timeout */
1337         rtd->pmdown_time = pmdown_time;
1338 
1339         ret = soc_probe_dai(cpu_dai, order);
1340         if (ret)
1341                 return ret;
1342 
1343         /* probe the CODEC DAI */
1344         for (i = 0; i < rtd->num_codecs; i++) {
1345                 ret = soc_probe_dai(rtd->codec_dais[i], order);
1346                 if (ret)
1347                         return ret;
1348         }
1349 
1350         /* complete DAI probe during last probe */
1351         if (order != SND_SOC_COMP_ORDER_LAST)
1352                 return 0;
1353 
1354         /* do machine specific initialization */
1355         if (dai_link->init) {
1356                 ret = dai_link->init(rtd);
1357                 if (ret < 0) {
1358                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1359                                 dai_link->name, ret);
1360                         return ret;
1361                 }
1362         }
1363 
1364         if (dai_link->dai_fmt)
1365                 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1366 
1367         ret = soc_post_component_init(rtd, dai_link->name);
1368         if (ret)
1369                 return ret;
1370 
1371 #ifdef CONFIG_DEBUG_FS
1372         /* add DPCM sysfs entries */
1373         if (dai_link->dynamic)
1374                 soc_dpcm_debugfs_add(rtd);
1375 #endif
1376 
1377         if (cpu_dai->driver->compress_dai) {
1378                 /*create compress_device"*/
1379                 ret = soc_new_compress(rtd, num);
1380                 if (ret < 0) {
1381                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1382                                          dai_link->stream_name);
1383                         return ret;
1384                 }
1385         } else {
1386 
1387                 if (!dai_link->params) {
1388                         /* create the pcm */
1389                         ret = soc_new_pcm(rtd, num);
1390                         if (ret < 0) {
1391                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1392                                        dai_link->stream_name, ret);
1393                                 return ret;
1394                         }
1395                 } else {
1396                         INIT_DELAYED_WORK(&rtd->delayed_work,
1397                                                 codec2codec_close_delayed_work);
1398 
1399                         /* link the DAI widgets */
1400                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1401                         if (ret)
1402                                 return ret;
1403                 }
1404         }
1405 
1406         return 0;
1407 }
1408 
1409 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1410 {
1411         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1412         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1413         const char *name = aux_dev->codec_name;
1414 
1415         rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1416         if (!rtd->component) {
1417                 if (aux_dev->codec_of_node)
1418                         name = of_node_full_name(aux_dev->codec_of_node);
1419 
1420                 dev_err(card->dev, "ASoC: %s not registered\n", name);
1421                 return -EPROBE_DEFER;
1422         }
1423 
1424         /*
1425          * Some places still reference rtd->codec, so we have to keep that
1426          * initialized if the component is a CODEC. Once all those references
1427          * have been removed, this code can be removed as well.
1428          */
1429          rtd->codec = rtd->component->codec;
1430 
1431         return 0;
1432 }
1433 
1434 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1435 {
1436         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1437         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1438         int ret;
1439 
1440         ret = soc_probe_component(card, rtd->component);
1441         if (ret < 0)
1442                 return ret;
1443 
1444         /* do machine specific initialization */
1445         if (aux_dev->init) {
1446                 ret = aux_dev->init(rtd->component);
1447                 if (ret < 0) {
1448                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1449                                 aux_dev->name, ret);
1450                         return ret;
1451                 }
1452         }
1453 
1454         return soc_post_component_init(rtd, aux_dev->name);
1455 }
1456 
1457 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1458 {
1459         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1460         struct snd_soc_component *component = rtd->component;
1461 
1462         /* unregister the rtd device */
1463         if (rtd->dev_registered) {
1464                 device_unregister(rtd->dev);
1465                 rtd->dev_registered = 0;
1466         }
1467 
1468         if (component && component->probed)
1469                 soc_remove_component(component);
1470 }
1471 
1472 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1473 {
1474         int ret;
1475 
1476         if (codec->cache_init)
1477                 return 0;
1478 
1479         ret = snd_soc_cache_init(codec);
1480         if (ret < 0) {
1481                 dev_err(codec->dev,
1482                         "ASoC: Failed to set cache compression type: %d\n",
1483                         ret);
1484                 return ret;
1485         }
1486         codec->cache_init = 1;
1487         return 0;
1488 }
1489 
1490 /**
1491  * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1492  * @rtd: The runtime for which the DAI link format should be changed
1493  * @dai_fmt: The new DAI link format
1494  *
1495  * This function updates the DAI link format for all DAIs connected to the DAI
1496  * link for the specified runtime.
1497  *
1498  * Note: For setups with a static format set the dai_fmt field in the
1499  * corresponding snd_dai_link struct instead of using this function.
1500  *
1501  * Returns 0 on success, otherwise a negative error code.
1502  */
1503 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1504         unsigned int dai_fmt)
1505 {
1506         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1507         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1508         unsigned int i;
1509         int ret;
1510 
1511         for (i = 0; i < rtd->num_codecs; i++) {
1512                 struct snd_soc_dai *codec_dai = codec_dais[i];
1513 
1514                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1515                 if (ret != 0 && ret != -ENOTSUPP) {
1516                         dev_warn(codec_dai->dev,
1517                                  "ASoC: Failed to set DAI format: %d\n", ret);
1518                         return ret;
1519                 }
1520         }
1521 
1522         /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1523         if (cpu_dai->codec) {
1524                 unsigned int inv_dai_fmt;
1525 
1526                 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1527                 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1528                 case SND_SOC_DAIFMT_CBM_CFM:
1529                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1530                         break;
1531                 case SND_SOC_DAIFMT_CBM_CFS:
1532                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1533                         break;
1534                 case SND_SOC_DAIFMT_CBS_CFM:
1535                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1536                         break;
1537                 case SND_SOC_DAIFMT_CBS_CFS:
1538                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1539                         break;
1540                 }
1541 
1542                 dai_fmt = inv_dai_fmt;
1543         }
1544 
1545         ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1546         if (ret != 0 && ret != -ENOTSUPP) {
1547                 dev_warn(cpu_dai->dev,
1548                          "ASoC: Failed to set DAI format: %d\n", ret);
1549                 return ret;
1550         }
1551 
1552         return 0;
1553 }
1554 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1555 
1556 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1557 {
1558         struct snd_soc_codec *codec;
1559         int ret, i, order;
1560 
1561         mutex_lock(&client_mutex);
1562         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1563 
1564         /* bind DAIs */
1565         for (i = 0; i < card->num_links; i++) {
1566                 ret = soc_bind_dai_link(card, i);
1567                 if (ret != 0)
1568                         goto base_error;
1569         }
1570 
1571         /* bind aux_devs too */
1572         for (i = 0; i < card->num_aux_devs; i++) {
1573                 ret = soc_bind_aux_dev(card, i);
1574                 if (ret != 0)
1575                         goto base_error;
1576         }
1577 
1578         /* initialize the register cache for each available codec */
1579         list_for_each_entry(codec, &codec_list, list) {
1580                 if (codec->cache_init)
1581                         continue;
1582                 ret = snd_soc_init_codec_cache(codec);
1583                 if (ret < 0)
1584                         goto base_error;
1585         }
1586 
1587         /* card bind complete so register a sound card */
1588         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1589                         card->owner, 0, &card->snd_card);
1590         if (ret < 0) {
1591                 dev_err(card->dev,
1592                         "ASoC: can't create sound card for card %s: %d\n",
1593                         card->name, ret);
1594                 goto base_error;
1595         }
1596 
1597         soc_init_card_debugfs(card);
1598 
1599         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1600         card->dapm.dev = card->dev;
1601         card->dapm.card = card;
1602         list_add(&card->dapm.list, &card->dapm_list);
1603 
1604 #ifdef CONFIG_DEBUG_FS
1605         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1606 #endif
1607 
1608 #ifdef CONFIG_PM_SLEEP
1609         /* deferred resume work */
1610         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1611 #endif
1612 
1613         if (card->dapm_widgets)
1614                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1615                                           card->num_dapm_widgets);
1616 
1617         if (card->of_dapm_widgets)
1618                 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1619                                           card->num_of_dapm_widgets);
1620 
1621         /* initialise the sound card only once */
1622         if (card->probe) {
1623                 ret = card->probe(card);
1624                 if (ret < 0)
1625                         goto card_probe_error;
1626         }
1627 
1628         /* probe all components used by DAI links on this card */
1629         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1630                         order++) {
1631                 for (i = 0; i < card->num_links; i++) {
1632                         ret = soc_probe_link_components(card, i, order);
1633                         if (ret < 0) {
1634                                 dev_err(card->dev,
1635                                         "ASoC: failed to instantiate card %d\n",
1636                                         ret);
1637                                 goto probe_dai_err;
1638                         }
1639                 }
1640         }
1641 
1642         /* probe all DAI links on this card */
1643         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1644                         order++) {
1645                 for (i = 0; i < card->num_links; i++) {
1646                         ret = soc_probe_link_dais(card, i, order);
1647                         if (ret < 0) {
1648                                 dev_err(card->dev,
1649                                         "ASoC: failed to instantiate card %d\n",
1650                                         ret);
1651                                 goto probe_dai_err;
1652                         }
1653                 }
1654         }
1655 
1656         for (i = 0; i < card->num_aux_devs; i++) {
1657                 ret = soc_probe_aux_dev(card, i);
1658                 if (ret < 0) {
1659                         dev_err(card->dev,
1660                                 "ASoC: failed to add auxiliary devices %d\n",
1661                                 ret);
1662                         goto probe_aux_dev_err;
1663                 }
1664         }
1665 
1666         snd_soc_dapm_link_dai_widgets(card);
1667         snd_soc_dapm_connect_dai_link_widgets(card);
1668 
1669         if (card->controls)
1670                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1671 
1672         if (card->dapm_routes)
1673                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1674                                         card->num_dapm_routes);
1675 
1676         if (card->of_dapm_routes)
1677                 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1678                                         card->num_of_dapm_routes);
1679 
1680         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1681                  "%s", card->name);
1682         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1683                  "%s", card->long_name ? card->long_name : card->name);
1684         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1685                  "%s", card->driver_name ? card->driver_name : card->name);
1686         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1687                 switch (card->snd_card->driver[i]) {
1688                 case '_':
1689                 case '-':
1690                 case '\0':
1691                         break;
1692                 default:
1693                         if (!isalnum(card->snd_card->driver[i]))
1694                                 card->snd_card->driver[i] = '_';
1695                         break;
1696                 }
1697         }
1698 
1699         if (card->late_probe) {
1700                 ret = card->late_probe(card);
1701                 if (ret < 0) {
1702                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1703                                 card->name, ret);
1704                         goto probe_aux_dev_err;
1705                 }
1706         }
1707 
1708         snd_soc_dapm_new_widgets(card);
1709 
1710         ret = snd_card_register(card->snd_card);
1711         if (ret < 0) {
1712                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1713                                 ret);
1714                 goto probe_aux_dev_err;
1715         }
1716 
1717         card->instantiated = 1;
1718         snd_soc_dapm_sync(&card->dapm);
1719         mutex_unlock(&card->mutex);
1720         mutex_unlock(&client_mutex);
1721 
1722         return 0;
1723 
1724 probe_aux_dev_err:
1725         for (i = 0; i < card->num_aux_devs; i++)
1726                 soc_remove_aux_dev(card, i);
1727 
1728 probe_dai_err:
1729         soc_remove_dai_links(card);
1730 
1731 card_probe_error:
1732         if (card->remove)
1733                 card->remove(card);
1734 
1735         soc_cleanup_card_debugfs(card);
1736         snd_card_free(card->snd_card);
1737 
1738 base_error:
1739         mutex_unlock(&card->mutex);
1740         mutex_unlock(&client_mutex);
1741 
1742         return ret;
1743 }
1744 
1745 /* probes a new socdev */
1746 static int soc_probe(struct platform_device *pdev)
1747 {
1748         struct snd_soc_card *card = platform_get_drvdata(pdev);
1749 
1750         /*
1751          * no card, so machine driver should be registering card
1752          * we should not be here in that case so ret error
1753          */
1754         if (!card)
1755                 return -EINVAL;
1756 
1757         dev_warn(&pdev->dev,
1758                  "ASoC: machine %s should use snd_soc_register_card()\n",
1759                  card->name);
1760 
1761         /* Bodge while we unpick instantiation */
1762         card->dev = &pdev->dev;
1763 
1764         return snd_soc_register_card(card);
1765 }
1766 
1767 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1768 {
1769         int i;
1770 
1771         /* make sure any delayed work runs */
1772         for (i = 0; i < card->num_rtd; i++) {
1773                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1774                 flush_delayed_work(&rtd->delayed_work);
1775         }
1776 
1777         /* remove auxiliary devices */
1778         for (i = 0; i < card->num_aux_devs; i++)
1779                 soc_remove_aux_dev(card, i);
1780 
1781         /* remove and free each DAI */
1782         soc_remove_dai_links(card);
1783 
1784         soc_cleanup_card_debugfs(card);
1785 
1786         /* remove the card */
1787         if (card->remove)
1788                 card->remove(card);
1789 
1790         snd_soc_dapm_free(&card->dapm);
1791 
1792         snd_card_free(card->snd_card);
1793         return 0;
1794 
1795 }
1796 
1797 /* removes a socdev */
1798 static int soc_remove(struct platform_device *pdev)
1799 {
1800         struct snd_soc_card *card = platform_get_drvdata(pdev);
1801 
1802         snd_soc_unregister_card(card);
1803         return 0;
1804 }
1805 
1806 int snd_soc_poweroff(struct device *dev)
1807 {
1808         struct snd_soc_card *card = dev_get_drvdata(dev);
1809         int i;
1810 
1811         if (!card->instantiated)
1812                 return 0;
1813 
1814         /* Flush out pmdown_time work - we actually do want to run it
1815          * now, we're shutting down so no imminent restart. */
1816         for (i = 0; i < card->num_rtd; i++) {
1817                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1818                 flush_delayed_work(&rtd->delayed_work);
1819         }
1820 
1821         snd_soc_dapm_shutdown(card);
1822 
1823         /* deactivate pins to sleep state */
1824         for (i = 0; i < card->num_rtd; i++) {
1825                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1826                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1827                 int j;
1828 
1829                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1830                 for (j = 0; j < rtd->num_codecs; j++) {
1831                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1832                         pinctrl_pm_select_sleep_state(codec_dai->dev);
1833                 }
1834         }
1835 
1836         return 0;
1837 }
1838 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1839 
1840 const struct dev_pm_ops snd_soc_pm_ops = {
1841         .suspend = snd_soc_suspend,
1842         .resume = snd_soc_resume,
1843         .freeze = snd_soc_suspend,
1844         .thaw = snd_soc_resume,
1845         .poweroff = snd_soc_poweroff,
1846         .restore = snd_soc_resume,
1847 };
1848 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1849 
1850 /* ASoC platform driver */
1851 static struct platform_driver soc_driver = {
1852         .driver         = {
1853                 .name           = "soc-audio",
1854                 .pm             = &snd_soc_pm_ops,
1855         },
1856         .probe          = soc_probe,
1857         .remove         = soc_remove,
1858 };
1859 
1860 /**
1861  * snd_soc_cnew - create new control
1862  * @_template: control template
1863  * @data: control private data
1864  * @long_name: control long name
1865  * @prefix: control name prefix
1866  *
1867  * Create a new mixer control from a template control.
1868  *
1869  * Returns 0 for success, else error.
1870  */
1871 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1872                                   void *data, const char *long_name,
1873                                   const char *prefix)
1874 {
1875         struct snd_kcontrol_new template;
1876         struct snd_kcontrol *kcontrol;
1877         char *name = NULL;
1878 
1879         memcpy(&template, _template, sizeof(template));
1880         template.index = 0;
1881 
1882         if (!long_name)
1883                 long_name = template.name;
1884 
1885         if (prefix) {
1886                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1887                 if (!name)
1888                         return NULL;
1889 
1890                 template.name = name;
1891         } else {
1892                 template.name = long_name;
1893         }
1894 
1895         kcontrol = snd_ctl_new1(&template, data);
1896 
1897         kfree(name);
1898 
1899         return kcontrol;
1900 }
1901 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1902 
1903 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1904         const struct snd_kcontrol_new *controls, int num_controls,
1905         const char *prefix, void *data)
1906 {
1907         int err, i;
1908 
1909         for (i = 0; i < num_controls; i++) {
1910                 const struct snd_kcontrol_new *control = &controls[i];
1911                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1912                                                      control->name, prefix));
1913                 if (err < 0) {
1914                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
1915                                 control->name, err);
1916                         return err;
1917                 }
1918         }
1919 
1920         return 0;
1921 }
1922 
1923 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1924                                                const char *name)
1925 {
1926         struct snd_card *card = soc_card->snd_card;
1927         struct snd_kcontrol *kctl;
1928 
1929         if (unlikely(!name))
1930                 return NULL;
1931 
1932         list_for_each_entry(kctl, &card->controls, list)
1933                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1934                         return kctl;
1935         return NULL;
1936 }
1937 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1938 
1939 /**
1940  * snd_soc_add_component_controls - Add an array of controls to a component.
1941  *
1942  * @component: Component 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_component_controls(struct snd_soc_component *component,
1949         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1950 {
1951         struct snd_card *card = component->card->snd_card;
1952 
1953         return snd_soc_add_controls(card, component->dev, controls,
1954                         num_controls, component->name_prefix, component);
1955 }
1956 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1957 
1958 /**
1959  * snd_soc_add_codec_controls - add an array of controls to a codec.
1960  * Convenience function to add a list of controls. Many codecs were
1961  * duplicating this code.
1962  *
1963  * @codec: codec to add controls to
1964  * @controls: array of controls to add
1965  * @num_controls: number of elements in the array
1966  *
1967  * Return 0 for success, else error.
1968  */
1969 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1970         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1971 {
1972         return snd_soc_add_component_controls(&codec->component, controls,
1973                 num_controls);
1974 }
1975 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1976 
1977 /**
1978  * snd_soc_add_platform_controls - add an array of controls to a platform.
1979  * Convenience function to add a list of controls.
1980  *
1981  * @platform: platform to add controls to
1982  * @controls: array of controls to add
1983  * @num_controls: number of elements in the array
1984  *
1985  * Return 0 for success, else error.
1986  */
1987 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1988         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1989 {
1990         return snd_soc_add_component_controls(&platform->component, controls,
1991                 num_controls);
1992 }
1993 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1994 
1995 /**
1996  * snd_soc_add_card_controls - add an array of controls to a SoC card.
1997  * Convenience function to add a list of controls.
1998  *
1999  * @soc_card: SoC card to add controls to
2000  * @controls: array of controls to add
2001  * @num_controls: number of elements in the array
2002  *
2003  * Return 0 for success, else error.
2004  */
2005 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2006         const struct snd_kcontrol_new *controls, int num_controls)
2007 {
2008         struct snd_card *card = soc_card->snd_card;
2009 
2010         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2011                         NULL, soc_card);
2012 }
2013 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2014 
2015 /**
2016  * snd_soc_add_dai_controls - add an array of controls to a DAI.
2017  * Convienience function to add a list of controls.
2018  *
2019  * @dai: DAI to add controls to
2020  * @controls: array of controls to add
2021  * @num_controls: number of elements in the array
2022  *
2023  * Return 0 for success, else error.
2024  */
2025 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2026         const struct snd_kcontrol_new *controls, int num_controls)
2027 {
2028         struct snd_card *card = dai->component->card->snd_card;
2029 
2030         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2031                         NULL, dai);
2032 }
2033 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2034 
2035 /**
2036  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2037  * @dai: DAI
2038  * @clk_id: DAI specific clock ID
2039  * @freq: new clock frequency in Hz
2040  * @dir: new clock direction - input/output.
2041  *
2042  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2043  */
2044 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2045         unsigned int freq, int dir)
2046 {
2047         if (dai->driver && dai->driver->ops->set_sysclk)
2048                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2049         else if (dai->codec && dai->codec->driver->set_sysclk)
2050                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2051                                                       freq, dir);
2052         else
2053                 return -ENOTSUPP;
2054 }
2055 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2056 
2057 /**
2058  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2059  * @codec: CODEC
2060  * @clk_id: DAI specific clock ID
2061  * @source: Source for the clock
2062  * @freq: new clock frequency in Hz
2063  * @dir: new clock direction - input/output.
2064  *
2065  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2066  */
2067 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2068                              int source, unsigned int freq, int dir)
2069 {
2070         if (codec->driver->set_sysclk)
2071                 return codec->driver->set_sysclk(codec, clk_id, source,
2072                                                  freq, dir);
2073         else
2074                 return -ENOTSUPP;
2075 }
2076 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2077 
2078 /**
2079  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2080  * @dai: DAI
2081  * @div_id: DAI specific clock divider ID
2082  * @div: new clock divisor.
2083  *
2084  * Configures the clock dividers. This is used to derive the best DAI bit and
2085  * frame clocks from the system or master clock. It's best to set the DAI bit
2086  * and frame clocks as low as possible to save system power.
2087  */
2088 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2089         int div_id, int div)
2090 {
2091         if (dai->driver && dai->driver->ops->set_clkdiv)
2092                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2093         else
2094                 return -EINVAL;
2095 }
2096 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2097 
2098 /**
2099  * snd_soc_dai_set_pll - configure DAI PLL.
2100  * @dai: DAI
2101  * @pll_id: DAI specific PLL ID
2102  * @source: DAI specific source for the PLL
2103  * @freq_in: PLL input clock frequency in Hz
2104  * @freq_out: requested PLL output clock frequency in Hz
2105  *
2106  * Configures and enables PLL to generate output clock based on input clock.
2107  */
2108 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2109         unsigned int freq_in, unsigned int freq_out)
2110 {
2111         if (dai->driver && dai->driver->ops->set_pll)
2112                 return dai->driver->ops->set_pll(dai, pll_id, source,
2113                                          freq_in, freq_out);
2114         else if (dai->codec && dai->codec->driver->set_pll)
2115                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2116                                                    freq_in, freq_out);
2117         else
2118                 return -EINVAL;
2119 }
2120 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2121 
2122 /*
2123  * snd_soc_codec_set_pll - configure codec PLL.
2124  * @codec: CODEC
2125  * @pll_id: DAI specific PLL ID
2126  * @source: DAI specific source for the PLL
2127  * @freq_in: PLL input clock frequency in Hz
2128  * @freq_out: requested PLL output clock frequency in Hz
2129  *
2130  * Configures and enables PLL to generate output clock based on input clock.
2131  */
2132 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2133                           unsigned int freq_in, unsigned int freq_out)
2134 {
2135         if (codec->driver->set_pll)
2136                 return codec->driver->set_pll(codec, pll_id, source,
2137                                               freq_in, freq_out);
2138         else
2139                 return -EINVAL;
2140 }
2141 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2142 
2143 /**
2144  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2145  * @dai: DAI
2146  * @ratio Ratio of BCLK to Sample rate.
2147  *
2148  * Configures the DAI for a preset BCLK to sample rate ratio.
2149  */
2150 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2151 {
2152         if (dai->driver && dai->driver->ops->set_bclk_ratio)
2153                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2154         else
2155                 return -EINVAL;
2156 }
2157 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2158 
2159 /**
2160  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2161  * @dai: DAI
2162  * @fmt: SND_SOC_DAIFMT_ format value.
2163  *
2164  * Configures the DAI hardware format and clocking.
2165  */
2166 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2167 {
2168         if (dai->driver == NULL)
2169                 return -EINVAL;
2170         if (dai->driver->ops->set_fmt == NULL)
2171                 return -ENOTSUPP;
2172         return dai->driver->ops->set_fmt(dai, fmt);
2173 }
2174 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2175 
2176 /**
2177  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2178  * @slots: Number of slots in use.
2179  * @tx_mask: bitmask representing active TX slots.
2180  * @rx_mask: bitmask representing active RX slots.
2181  *
2182  * Generates the TDM tx and rx slot default masks for DAI.
2183  */
2184 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2185                                           unsigned int *tx_mask,
2186                                           unsigned int *rx_mask)
2187 {
2188         if (*tx_mask || *rx_mask)
2189                 return 0;
2190 
2191         if (!slots)
2192                 return -EINVAL;
2193 
2194         *tx_mask = (1 << slots) - 1;
2195         *rx_mask = (1 << slots) - 1;
2196 
2197         return 0;
2198 }
2199 
2200 /**
2201  * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2202  * @dai: The DAI to configure
2203  * @tx_mask: bitmask representing active TX slots.
2204  * @rx_mask: bitmask representing active RX slots.
2205  * @slots: Number of slots in use.
2206  * @slot_width: Width in bits for each slot.
2207  *
2208  * This function configures the specified DAI for TDM operation. @slot contains
2209  * the total number of slots of the TDM stream and @slot_with the width of each
2210  * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2211  * active slots of the TDM stream for the specified DAI, i.e. which slots the
2212  * DAI should write to or read from. If a bit is set the corresponding slot is
2213  * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2214  * the first slot, bit 1 to the second slot and so on. The first active slot
2215  * maps to the first channel of the DAI, the second active slot to the second
2216  * channel and so on.
2217  *
2218  * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2219  * @rx_mask and @slot_width will be ignored.
2220  *
2221  * Returns 0 on success, a negative error code otherwise.
2222  */
2223 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2224         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2225 {
2226         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2227                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2228                                                 &tx_mask, &rx_mask);
2229         else
2230                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2231 
2232         dai->tx_mask = tx_mask;
2233         dai->rx_mask = rx_mask;
2234 
2235         if (dai->driver && dai->driver->ops->set_tdm_slot)
2236                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2237                                 slots, slot_width);
2238         else
2239                 return -ENOTSUPP;
2240 }
2241 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2242 
2243 /**
2244  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2245  * @dai: DAI
2246  * @tx_num: how many TX channels
2247  * @tx_slot: pointer to an array which imply the TX slot number channel
2248  *           0~num-1 uses
2249  * @rx_num: how many RX channels
2250  * @rx_slot: pointer to an array which imply the RX slot number channel
2251  *           0~num-1 uses
2252  *
2253  * configure the relationship between channel number and TDM slot number.
2254  */
2255 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2256         unsigned int tx_num, unsigned int *tx_slot,
2257         unsigned int rx_num, unsigned int *rx_slot)
2258 {
2259         if (dai->driver && dai->driver->ops->set_channel_map)
2260                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2261                         rx_num, rx_slot);
2262         else
2263                 return -EINVAL;
2264 }
2265 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2266 
2267 /**
2268  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2269  * @dai: DAI
2270  * @tristate: tristate enable
2271  *
2272  * Tristates the DAI so that others can use it.
2273  */
2274 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2275 {
2276         if (dai->driver && dai->driver->ops->set_tristate)
2277                 return dai->driver->ops->set_tristate(dai, tristate);
2278         else
2279                 return -EINVAL;
2280 }
2281 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2282 
2283 /**
2284  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2285  * @dai: DAI
2286  * @mute: mute enable
2287  * @direction: stream to mute
2288  *
2289  * Mutes the DAI DAC.
2290  */
2291 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2292                              int direction)
2293 {
2294         if (!dai->driver)
2295                 return -ENOTSUPP;
2296 
2297         if (dai->driver->ops->mute_stream)
2298                 return dai->driver->ops->mute_stream(dai, mute, direction);
2299         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2300                  dai->driver->ops->digital_mute)
2301                 return dai->driver->ops->digital_mute(dai, mute);
2302         else
2303                 return -ENOTSUPP;
2304 }
2305 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2306 
2307 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2308                                    struct snd_soc_dai_link *dai_link)
2309 {
2310         /* Legacy codec/codec_dai link is a single entry in multicodec */
2311         if (dai_link->codec_name || dai_link->codec_of_node ||
2312             dai_link->codec_dai_name) {
2313                 dai_link->num_codecs = 1;
2314 
2315                 dai_link->codecs = devm_kzalloc(card->dev,
2316                                 sizeof(struct snd_soc_dai_link_component),
2317                                 GFP_KERNEL);
2318                 if (!dai_link->codecs)
2319                         return -ENOMEM;
2320 
2321                 dai_link->codecs[0].name = dai_link->codec_name;
2322                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2323                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2324         }
2325 
2326         if (!dai_link->codecs) {
2327                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2328                 return -EINVAL;
2329         }
2330 
2331         return 0;
2332 }
2333 
2334 /**
2335  * snd_soc_register_card - Register a card with the ASoC core
2336  *
2337  * @card: Card to register
2338  *
2339  */
2340 int snd_soc_register_card(struct snd_soc_card *card)
2341 {
2342         int i, j, ret;
2343 
2344         if (!card->name || !card->dev)
2345                 return -EINVAL;
2346 
2347         for (i = 0; i < card->num_links; i++) {
2348                 struct snd_soc_dai_link *link = &card->dai_link[i];
2349 
2350                 ret = snd_soc_init_multicodec(card, link);
2351                 if (ret) {
2352                         dev_err(card->dev, "ASoC: failed to init multicodec\n");
2353                         return ret;
2354                 }
2355 
2356                 for (j = 0; j < link->num_codecs; j++) {
2357                         /*
2358                          * Codec must be specified by 1 of name or OF node,
2359                          * not both or neither.
2360                          */
2361                         if (!!link->codecs[j].name ==
2362                             !!link->codecs[j].of_node) {
2363                                 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2364                                         link->name);
2365                                 return -EINVAL;
2366                         }
2367                         /* Codec DAI name must be specified */
2368                         if (!link->codecs[j].dai_name) {
2369                                 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2370                                         link->name);
2371                                 return -EINVAL;
2372                         }
2373                 }
2374 
2375                 /*
2376                  * Platform may be specified by either name or OF node, but
2377                  * can be left unspecified, and a dummy platform will be used.
2378                  */
2379                 if (link->platform_name && link->platform_of_node) {
2380                         dev_err(card->dev,
2381                                 "ASoC: Both platform name/of_node are set for %s\n",
2382                                 link->name);
2383                         return -EINVAL;
2384                 }
2385 
2386                 /*
2387                  * CPU device may be specified by either name or OF node, but
2388                  * can be left unspecified, and will be matched based on DAI
2389                  * name alone..
2390                  */
2391                 if (link->cpu_name && link->cpu_of_node) {
2392                         dev_err(card->dev,
2393                                 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2394                                 link->name);
2395                         return -EINVAL;
2396                 }
2397                 /*
2398                  * At least one of CPU DAI name or CPU device name/node must be
2399                  * specified
2400                  */
2401                 if (!link->cpu_dai_name &&
2402                     !(link->cpu_name || link->cpu_of_node)) {
2403                         dev_err(card->dev,
2404                                 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2405                                 link->name);
2406                         return -EINVAL;
2407                 }
2408         }
2409 
2410         dev_set_drvdata(card->dev, card);
2411 
2412         snd_soc_initialize_card_lists(card);
2413 
2414         card->rtd = devm_kzalloc(card->dev,
2415                                  sizeof(struct snd_soc_pcm_runtime) *
2416                                  (card->num_links + card->num_aux_devs),
2417                                  GFP_KERNEL);
2418         if (card->rtd == NULL)
2419                 return -ENOMEM;
2420         card->num_rtd = 0;
2421         card->rtd_aux = &card->rtd[card->num_links];
2422 
2423         for (i = 0; i < card->num_links; i++) {
2424                 card->rtd[i].card = card;
2425                 card->rtd[i].dai_link = &card->dai_link[i];
2426                 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2427                                         sizeof(struct snd_soc_dai *) *
2428                                         (card->rtd[i].dai_link->num_codecs),
2429                                         GFP_KERNEL);
2430                 if (card->rtd[i].codec_dais == NULL)
2431                         return -ENOMEM;
2432         }
2433 
2434         for (i = 0; i < card->num_aux_devs; i++)
2435                 card->rtd_aux[i].card = card;
2436 
2437         INIT_LIST_HEAD(&card->dapm_dirty);
2438         card->instantiated = 0;
2439         mutex_init(&card->mutex);
2440         mutex_init(&card->dapm_mutex);
2441 
2442         ret = snd_soc_instantiate_card(card);
2443         if (ret != 0)
2444                 return ret;
2445 
2446         /* deactivate pins to sleep state */
2447         for (i = 0; i < card->num_rtd; i++) {
2448                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2449                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2450                 int j;
2451 
2452                 for (j = 0; j < rtd->num_codecs; j++) {
2453                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2454                         if (!codec_dai->active)
2455                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
2456                 }
2457 
2458                 if (!cpu_dai->active)
2459                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
2460         }
2461 
2462         return ret;
2463 }
2464 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2465 
2466 /**
2467  * snd_soc_unregister_card - Unregister a card with the ASoC core
2468  *
2469  * @card: Card to unregister
2470  *
2471  */
2472 int snd_soc_unregister_card(struct snd_soc_card *card)
2473 {
2474         if (card->instantiated) {
2475                 card->instantiated = false;
2476                 snd_soc_dapm_shutdown(card);
2477                 soc_cleanup_card_resources(card);
2478                 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2479         }
2480 
2481         return 0;
2482 }
2483 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2484 
2485 /*
2486  * Simplify DAI link configuration by removing ".-1" from device names
2487  * and sanitizing names.
2488  */
2489 static char *fmt_single_name(struct device *dev, int *id)
2490 {
2491         char *found, name[NAME_SIZE];
2492         int id1, id2;
2493 
2494         if (dev_name(dev) == NULL)
2495                 return NULL;
2496 
2497         strlcpy(name, dev_name(dev), NAME_SIZE);
2498 
2499         /* are we a "%s.%d" name (platform and SPI components) */
2500         found = strstr(name, dev->driver->name);
2501         if (found) {
2502                 /* get ID */
2503                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2504 
2505                         /* discard ID from name if ID == -1 */
2506                         if (*id == -1)
2507                                 found[strlen(dev->driver->name)] = '\0';
2508                 }
2509 
2510         } else {
2511                 /* I2C component devices are named "bus-addr"  */
2512                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2513                         char tmp[NAME_SIZE];
2514 
2515                         /* create unique ID number from I2C addr and bus */
2516                         *id = ((id1 & 0xffff) << 16) + id2;
2517 
2518                         /* sanitize component name for DAI link creation */
2519                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2520                         strlcpy(name, tmp, NAME_SIZE);
2521                 } else
2522                         *id = 0;
2523         }
2524 
2525         return kstrdup(name, GFP_KERNEL);
2526 }
2527 
2528 /*
2529  * Simplify DAI link naming for single devices with multiple DAIs by removing
2530  * any ".-1" and using the DAI name (instead of device name).
2531  */
2532 static inline char *fmt_multiple_name(struct device *dev,
2533                 struct snd_soc_dai_driver *dai_drv)
2534 {
2535         if (dai_drv->name == NULL) {
2536                 dev_err(dev,
2537                         "ASoC: error - multiple DAI %s registered with no name\n",
2538                         dev_name(dev));
2539                 return NULL;
2540         }
2541 
2542         return kstrdup(dai_drv->name, GFP_KERNEL);
2543 }
2544 
2545 /**
2546  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2547  *
2548  * @component: The component for which the DAIs should be unregistered
2549  */
2550 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2551 {
2552         struct snd_soc_dai *dai, *_dai;
2553 
2554         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2555                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2556                         dai->name);
2557                 list_del(&dai->list);
2558                 kfree(dai->name);
2559                 kfree(dai);
2560         }
2561 }
2562 
2563 /**
2564  * snd_soc_register_dais - Register a DAI with the ASoC core
2565  *
2566  * @component: The component the DAIs are registered for
2567  * @dai_drv: DAI driver to use for the DAIs
2568  * @count: Number of DAIs
2569  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2570  *                     parent's name.
2571  */
2572 static int snd_soc_register_dais(struct snd_soc_component *component,
2573         struct snd_soc_dai_driver *dai_drv, size_t count,
2574         bool legacy_dai_naming)
2575 {
2576         struct device *dev = component->dev;
2577         struct snd_soc_dai *dai;
2578         unsigned int i;
2579         int ret;
2580 
2581         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2582 
2583         component->dai_drv = dai_drv;
2584         component->num_dai = count;
2585 
2586         for (i = 0; i < count; i++) {
2587 
2588                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2589                 if (dai == NULL) {
2590                         ret = -ENOMEM;
2591                         goto err;
2592                 }
2593 
2594                 /*
2595                  * Back in the old days when we still had component-less DAIs,
2596                  * instead of having a static name, component-less DAIs would
2597                  * inherit the name of the parent device so it is possible to
2598                  * register multiple instances of the DAI. We still need to keep
2599                  * the same naming style even though those DAIs are not
2600                  * component-less anymore.
2601                  */
2602                 if (count == 1 && legacy_dai_naming) {
2603                         dai->name = fmt_single_name(dev, &dai->id);
2604                 } else {
2605                         dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2606                         if (dai_drv[i].id)
2607                                 dai->id = dai_drv[i].id;
2608                         else
2609                                 dai->id = i;
2610                 }
2611                 if (dai->name == NULL) {
2612                         kfree(dai);
2613                         ret = -ENOMEM;
2614                         goto err;
2615                 }
2616 
2617                 dai->component = component;
2618                 dai->dev = dev;
2619                 dai->driver = &dai_drv[i];
2620                 if (!dai->driver->ops)
2621                         dai->driver->ops = &null_dai_ops;
2622 
2623                 list_add(&dai->list, &component->dai_list);
2624 
2625                 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2626         }
2627 
2628         return 0;
2629 
2630 err:
2631         snd_soc_unregister_dais(component);
2632 
2633         return ret;
2634 }
2635 
2636 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2637         enum snd_soc_dapm_type type, int subseq)
2638 {
2639         struct snd_soc_component *component = dapm->component;
2640 
2641         component->driver->seq_notifier(component, type, subseq);
2642 }
2643 
2644 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2645         int event)
2646 {
2647         struct snd_soc_component *component = dapm->component;
2648 
2649         return component->driver->stream_event(component, event);
2650 }
2651 
2652 static int snd_soc_component_initialize(struct snd_soc_component *component,
2653         const struct snd_soc_component_driver *driver, struct device *dev)
2654 {
2655         struct snd_soc_dapm_context *dapm;
2656 
2657         component->name = fmt_single_name(dev, &component->id);
2658         if (!component->name) {
2659                 dev_err(dev, "ASoC: Failed to allocate name\n");
2660                 return -ENOMEM;
2661         }
2662 
2663         component->dev = dev;
2664         component->driver = driver;
2665         component->probe = component->driver->probe;
2666         component->remove = component->driver->remove;
2667 
2668         if (!component->dapm_ptr)
2669                 component->dapm_ptr = &component->dapm;
2670 
2671         dapm = component->dapm_ptr;
2672         dapm->dev = dev;
2673         dapm->component = component;
2674         dapm->bias_level = SND_SOC_BIAS_OFF;
2675         dapm->idle_bias_off = true;
2676         if (driver->seq_notifier)
2677                 dapm->seq_notifier = snd_soc_component_seq_notifier;
2678         if (driver->stream_event)
2679                 dapm->stream_event = snd_soc_component_stream_event;
2680 
2681         component->controls = driver->controls;
2682         component->num_controls = driver->num_controls;
2683         component->dapm_widgets = driver->dapm_widgets;
2684         component->num_dapm_widgets = driver->num_dapm_widgets;
2685         component->dapm_routes = driver->dapm_routes;
2686         component->num_dapm_routes = driver->num_dapm_routes;
2687 
2688         INIT_LIST_HEAD(&component->dai_list);
2689         mutex_init(&component->io_mutex);
2690 
2691         return 0;
2692 }
2693 
2694 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2695 {
2696         int val_bytes = regmap_get_val_bytes(component->regmap);
2697 
2698         /* Errors are legitimate for non-integer byte multiples */
2699         if (val_bytes > 0)
2700                 component->val_bytes = val_bytes;
2701 }
2702 
2703 #ifdef CONFIG_REGMAP
2704 
2705 /**
2706  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2707  * @component: The component for which to initialize the regmap instance
2708  * @regmap: The regmap instance that should be used by the component
2709  *
2710  * This function allows deferred assignment of the regmap instance that is
2711  * associated with the component. Only use this if the regmap instance is not
2712  * yet ready when the component is registered. The function must also be called
2713  * before the first IO attempt of the component.
2714  */
2715 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2716         struct regmap *regmap)
2717 {
2718         component->regmap = regmap;
2719         snd_soc_component_setup_regmap(component);
2720 }
2721 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2722 
2723 /**
2724  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2725  * @component: The component for which to de-initialize the regmap instance
2726  *
2727  * Calls regmap_exit() on the regmap instance associated to the component and
2728  * removes the regmap instance from the component.
2729  *
2730  * This function should only be used if snd_soc_component_init_regmap() was used
2731  * to initialize the regmap instance.
2732  */
2733 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2734 {
2735         regmap_exit(component->regmap);
2736         component->regmap = NULL;
2737 }
2738 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2739 
2740 #endif
2741 
2742 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2743 {
2744         if (!component->write && !component->read) {
2745                 if (!component->regmap)
2746                         component->regmap = dev_get_regmap(component->dev, NULL);
2747                 if (component->regmap)
2748                         snd_soc_component_setup_regmap(component);
2749         }
2750 
2751         list_add(&component->list, &component_list);
2752 }
2753 
2754 static void snd_soc_component_add(struct snd_soc_component *component)
2755 {
2756         mutex_lock(&client_mutex);
2757         snd_soc_component_add_unlocked(component);
2758         mutex_unlock(&client_mutex);
2759 }
2760 
2761 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2762 {
2763         snd_soc_unregister_dais(component);
2764         kfree(component->name);
2765 }
2766 
2767 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2768 {
2769         list_del(&component->list);
2770 }
2771 
2772 int snd_soc_register_component(struct device *dev,
2773                                const struct snd_soc_component_driver *cmpnt_drv,
2774                                struct snd_soc_dai_driver *dai_drv,
2775                                int num_dai)
2776 {
2777         struct snd_soc_component *cmpnt;
2778         int ret;
2779 
2780         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2781         if (!cmpnt) {
2782                 dev_err(dev, "ASoC: Failed to allocate memory\n");
2783                 return -ENOMEM;
2784         }
2785 
2786         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2787         if (ret)
2788                 goto err_free;
2789 
2790         cmpnt->ignore_pmdown_time = true;
2791         cmpnt->registered_as_component = true;
2792 
2793         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2794         if (ret < 0) {
2795                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2796                 goto err_cleanup;
2797         }
2798 
2799         snd_soc_component_add(cmpnt);
2800 
2801         return 0;
2802 
2803 err_cleanup:
2804         snd_soc_component_cleanup(cmpnt);
2805 err_free:
2806         kfree(cmpnt);
2807         return ret;
2808 }
2809 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2810 
2811 /**
2812  * snd_soc_unregister_component - Unregister a component from the ASoC core
2813  *
2814  */
2815 void snd_soc_unregister_component(struct device *dev)
2816 {
2817         struct snd_soc_component *cmpnt;
2818 
2819         mutex_lock(&client_mutex);
2820         list_for_each_entry(cmpnt, &component_list, list) {
2821                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2822                         goto found;
2823         }
2824         mutex_unlock(&client_mutex);
2825         return;
2826 
2827 found:
2828         snd_soc_component_del_unlocked(cmpnt);
2829         mutex_unlock(&client_mutex);
2830         snd_soc_component_cleanup(cmpnt);
2831         kfree(cmpnt);
2832 }
2833 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2834 
2835 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2836 {
2837         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2838 
2839         return platform->driver->probe(platform);
2840 }
2841 
2842 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2843 {
2844         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2845 
2846         platform->driver->remove(platform);
2847 }
2848 
2849 /**
2850  * snd_soc_add_platform - Add a platform to the ASoC core
2851  * @dev: The parent device for the platform
2852  * @platform: The platform to add
2853  * @platform_driver: The driver for the platform
2854  */
2855 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2856                 const struct snd_soc_platform_driver *platform_drv)
2857 {
2858         int ret;
2859 
2860         ret = snd_soc_component_initialize(&platform->component,
2861                         &platform_drv->component_driver, dev);
2862         if (ret)
2863                 return ret;
2864 
2865         platform->dev = dev;
2866         platform->driver = platform_drv;
2867 
2868         if (platform_drv->probe)
2869                 platform->component.probe = snd_soc_platform_drv_probe;
2870         if (platform_drv->remove)
2871                 platform->component.remove = snd_soc_platform_drv_remove;
2872 
2873 #ifdef CONFIG_DEBUG_FS
2874         platform->component.debugfs_prefix = "platform";
2875 #endif
2876 
2877         mutex_lock(&client_mutex);
2878         snd_soc_component_add_unlocked(&platform->component);
2879         list_add(&platform->list, &platform_list);
2880         mutex_unlock(&client_mutex);
2881 
2882         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2883                 platform->component.name);
2884 
2885         return 0;
2886 }
2887 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2888 
2889 /**
2890  * snd_soc_register_platform - Register a platform with the ASoC core
2891  *
2892  * @platform: platform to register
2893  */
2894 int snd_soc_register_platform(struct device *dev,
2895                 const struct snd_soc_platform_driver *platform_drv)
2896 {
2897         struct snd_soc_platform *platform;
2898         int ret;
2899 
2900         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2901 
2902         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2903         if (platform == NULL)
2904                 return -ENOMEM;
2905 
2906         ret = snd_soc_add_platform(dev, platform, platform_drv);
2907         if (ret)
2908                 kfree(platform);
2909 
2910         return ret;
2911 }
2912 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2913 
2914 /**
2915  * snd_soc_remove_platform - Remove a platform from the ASoC core
2916  * @platform: the platform to remove
2917  */
2918 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2919 {
2920 
2921         mutex_lock(&client_mutex);
2922         list_del(&platform->list);
2923         snd_soc_component_del_unlocked(&platform->component);
2924         mutex_unlock(&client_mutex);
2925 
2926         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2927                 platform->component.name);
2928 
2929         snd_soc_component_cleanup(&platform->component);
2930 }
2931 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2932 
2933 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2934 {
2935         struct snd_soc_platform *platform;
2936 
2937         mutex_lock(&client_mutex);
2938         list_for_each_entry(platform, &platform_list, list) {
2939                 if (dev == platform->dev) {
2940                         mutex_unlock(&client_mutex);
2941                         return platform;
2942                 }
2943         }
2944         mutex_unlock(&client_mutex);
2945 
2946         return NULL;
2947 }
2948 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2949 
2950 /**
2951  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2952  *
2953  * @platform: platform to unregister
2954  */
2955 void snd_soc_unregister_platform(struct device *dev)
2956 {
2957         struct snd_soc_platform *platform;
2958 
2959         platform = snd_soc_lookup_platform(dev);
2960         if (!platform)
2961                 return;
2962 
2963         snd_soc_remove_platform(platform);
2964         kfree(platform);
2965 }
2966 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2967 
2968 static u64 codec_format_map[] = {
2969         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2970         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2971         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2972         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2973         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2974         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2975         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2976         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2977         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2978         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2979         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2980         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2981         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2982         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2983         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2984         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2985 };
2986 
2987 /* Fix up the DAI formats for endianness: codecs don't actually see
2988  * the endianness of the data but we're using the CPU format
2989  * definitions which do need to include endianness so we ensure that
2990  * codec DAIs always have both big and little endian variants set.
2991  */
2992 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2993 {
2994         int i;
2995 
2996         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2997                 if (stream->formats & codec_format_map[i])
2998                         stream->formats |= codec_format_map[i];
2999 }
3000 
3001 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3002 {
3003         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3004 
3005         return codec->driver->probe(codec);
3006 }
3007 
3008 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3009 {
3010         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3011 
3012         codec->driver->remove(codec);
3013 }
3014 
3015 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3016         unsigned int reg, unsigned int val)
3017 {
3018         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3019 
3020         return codec->driver->write(codec, reg, val);
3021 }
3022 
3023 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3024         unsigned int reg, unsigned int *val)
3025 {
3026         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3027 
3028         *val = codec->driver->read(codec, reg);
3029 
3030         return 0;
3031 }
3032 
3033 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3034         enum snd_soc_bias_level level)
3035 {
3036         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3037 
3038         return codec->driver->set_bias_level(codec, level);
3039 }
3040 
3041 /**
3042  * snd_soc_register_codec - Register a codec with the ASoC core
3043  *
3044  * @codec: codec to register
3045  */
3046 int snd_soc_register_codec(struct device *dev,
3047                            const struct snd_soc_codec_driver *codec_drv,
3048                            struct snd_soc_dai_driver *dai_drv,
3049                            int num_dai)
3050 {
3051         struct snd_soc_codec *codec;
3052         struct snd_soc_dai *dai;
3053         int ret, i;
3054 
3055         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3056 
3057         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3058         if (codec == NULL)
3059                 return -ENOMEM;
3060 
3061         codec->component.dapm_ptr = &codec->dapm;
3062         codec->component.codec = codec;
3063 
3064         ret = snd_soc_component_initialize(&codec->component,
3065                         &codec_drv->component_driver, dev);
3066         if (ret)
3067                 goto err_free;
3068 
3069         if (codec_drv->controls) {
3070                 codec->component.controls = codec_drv->controls;
3071                 codec->component.num_controls = codec_drv->num_controls;
3072         }
3073         if (codec_drv->dapm_widgets) {
3074                 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3075                 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3076         }
3077         if (codec_drv->dapm_routes) {
3078                 codec->component.dapm_routes = codec_drv->dapm_routes;
3079                 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3080         }
3081 
3082         if (codec_drv->probe)
3083                 codec->component.probe = snd_soc_codec_drv_probe;
3084         if (codec_drv->remove)
3085                 codec->component.remove = snd_soc_codec_drv_remove;
3086         if (codec_drv->write)
3087                 codec->component.write = snd_soc_codec_drv_write;
3088         if (codec_drv->read)
3089                 codec->component.read = snd_soc_codec_drv_read;
3090         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3091         codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3092         codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3093         if (codec_drv->seq_notifier)
3094                 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3095         if (codec_drv->set_bias_level)
3096                 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3097         codec->dev = dev;
3098         codec->driver = codec_drv;
3099         codec->component.val_bytes = codec_drv->reg_word_size;
3100 
3101 #ifdef CONFIG_DEBUG_FS
3102         codec->component.init_debugfs = soc_init_codec_debugfs;
3103         codec->component.debugfs_prefix = "codec";
3104 #endif
3105 
3106         if (codec_drv->get_regmap)
3107                 codec->component.regmap = codec_drv->get_regmap(dev);
3108 
3109         for (i = 0; i < num_dai; i++) {
3110                 fixup_codec_formats(&dai_drv[i].playback);
3111                 fixup_codec_formats(&dai_drv[i].capture);
3112         }
3113 
3114         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3115         if (ret < 0) {
3116                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3117                 goto err_cleanup;
3118         }
3119 
3120         list_for_each_entry(dai, &codec->component.dai_list, list)
3121                 dai->codec = codec;
3122 
3123         mutex_lock(&client_mutex);
3124         snd_soc_component_add_unlocked(&codec->component);
3125         list_add(&codec->list, &codec_list);
3126         mutex_unlock(&client_mutex);
3127 
3128         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3129                 codec->component.name);
3130         return 0;
3131 
3132 err_cleanup:
3133         snd_soc_component_cleanup(&codec->component);
3134 err_free:
3135         kfree(codec);
3136         return ret;
3137 }
3138 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3139 
3140 /**
3141  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3142  *
3143  * @codec: codec to unregister
3144  */
3145 void snd_soc_unregister_codec(struct device *dev)
3146 {
3147         struct snd_soc_codec *codec;
3148 
3149         mutex_lock(&client_mutex);
3150         list_for_each_entry(codec, &codec_list, list) {
3151                 if (dev == codec->dev)
3152                         goto found;
3153         }
3154         mutex_unlock(&client_mutex);
3155         return;
3156 
3157 found:
3158         list_del(&codec->list);
3159         snd_soc_component_del_unlocked(&codec->component);
3160         mutex_unlock(&client_mutex);
3161 
3162         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3163                         codec->component.name);
3164 
3165         snd_soc_component_cleanup(&codec->component);
3166         snd_soc_cache_exit(codec);
3167         kfree(codec);
3168 }
3169 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3170 
3171 /* Retrieve a card's name from device tree */
3172 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3173                                const char *propname)
3174 {
3175         struct device_node *np;
3176         int ret;
3177 
3178         if (!card->dev) {
3179                 pr_err("card->dev is not set before calling %s\n", __func__);
3180                 return -EINVAL;
3181         }
3182 
3183         np = card->dev->of_node;
3184 
3185         ret = of_property_read_string_index(np, propname, 0, &card->name);
3186         /*
3187          * EINVAL means the property does not exist. This is fine providing
3188          * card->name was previously set, which is checked later in
3189          * snd_soc_register_card.
3190          */
3191         if (ret < 0 && ret != -EINVAL) {
3192                 dev_err(card->dev,
3193                         "ASoC: Property '%s' could not be read: %d\n",
3194                         propname, ret);
3195                 return ret;
3196         }
3197 
3198         return 0;
3199 }
3200 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3201 
3202 static const struct snd_soc_dapm_widget simple_widgets[] = {
3203         SND_SOC_DAPM_MIC("Microphone", NULL),
3204         SND_SOC_DAPM_LINE("Line", NULL),
3205         SND_SOC_DAPM_HP("Headphone", NULL),
3206         SND_SOC_DAPM_SPK("Speaker", NULL),
3207 };
3208 
3209 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3210                                           const char *propname)
3211 {
3212         struct device_node *np = card->dev->of_node;
3213         struct snd_soc_dapm_widget *widgets;
3214         const char *template, *wname;
3215         int i, j, num_widgets, ret;
3216 
3217         num_widgets = of_property_count_strings(np, propname);
3218         if (num_widgets < 0) {
3219                 dev_err(card->dev,
3220                         "ASoC: Property '%s' does not exist\n", propname);
3221                 return -EINVAL;
3222         }
3223         if (num_widgets & 1) {
3224                 dev_err(card->dev,
3225                         "ASoC: Property '%s' length is not even\n", propname);
3226                 return -EINVAL;
3227         }
3228 
3229         num_widgets /= 2;
3230         if (!num_widgets) {
3231                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3232                         propname);
3233                 return -EINVAL;
3234         }
3235 
3236         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3237                                GFP_KERNEL);
3238         if (!widgets) {
3239                 dev_err(card->dev,
3240                         "ASoC: Could not allocate memory for widgets\n");
3241                 return -ENOMEM;
3242         }
3243 
3244         for (i = 0; i < num_widgets; i++) {
3245                 ret = of_property_read_string_index(np, propname,
3246                         2 * i, &template);
3247                 if (ret) {
3248                         dev_err(card->dev,
3249                                 "ASoC: Property '%s' index %d read error:%d\n",
3250                                 propname, 2 * i, ret);
3251                         return -EINVAL;
3252                 }
3253 
3254                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3255                         if (!strncmp(template, simple_widgets[j].name,
3256                                      strlen(simple_widgets[j].name))) {
3257                                 widgets[i] = simple_widgets[j];
3258                                 break;
3259                         }
3260                 }
3261 
3262                 if (j >= ARRAY_SIZE(simple_widgets)) {
3263                         dev_err(card->dev,
3264                                 "ASoC: DAPM widget '%s' is not supported\n",
3265                                 template);
3266                         return -EINVAL;
3267                 }
3268 
3269                 ret = of_property_read_string_index(np, propname,
3270                                                     (2 * i) + 1,
3271                                                     &wname);
3272                 if (ret) {
3273                         dev_err(card->dev,
3274                                 "ASoC: Property '%s' index %d read error:%d\n",
3275                                 propname, (2 * i) + 1, ret);
3276                         return -EINVAL;
3277                 }
3278 
3279                 widgets[i].name = wname;
3280         }
3281 
3282         card->of_dapm_widgets = widgets;
3283         card->num_of_dapm_widgets = num_widgets;
3284 
3285         return 0;
3286 }
3287 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3288 
3289 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3290                               unsigned int *slots,
3291                               unsigned int *slot_width)
3292 {
3293         u32 val;
3294         int ret;
3295 
3296         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3297                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3298                 if (ret)
3299                         return ret;
3300 
3301                 if (slots)
3302                         *slots = val;
3303         }
3304 
3305         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3306                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3307                 if (ret)
3308                         return ret;
3309 
3310                 if (slot_width)
3311                         *slot_width = val;
3312         }
3313 
3314         return 0;
3315 }
3316 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3317 
3318 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3319                                    const char *propname)
3320 {
3321         struct device_node *np = card->dev->of_node;
3322         int num_routes;
3323         struct snd_soc_dapm_route *routes;
3324         int i, ret;
3325 
3326         num_routes = of_property_count_strings(np, propname);
3327         if (num_routes < 0 || num_routes & 1) {
3328                 dev_err(card->dev,
3329                         "ASoC: Property '%s' does not exist or its length is not even\n",
3330                         propname);
3331                 return -EINVAL;
3332         }
3333         num_routes /= 2;
3334         if (!num_routes) {
3335                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3336                         propname);
3337                 return -EINVAL;
3338         }
3339 
3340         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3341                               GFP_KERNEL);
3342         if (!routes) {
3343                 dev_err(card->dev,
3344                         "ASoC: Could not allocate DAPM route table\n");
3345                 return -EINVAL;
3346         }
3347 
3348         for (i = 0; i < num_routes; i++) {
3349                 ret = of_property_read_string_index(np, propname,
3350                         2 * i, &routes[i].sink);
3351                 if (ret) {
3352                         dev_err(card->dev,
3353                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3354                                 propname, 2 * i, ret);
3355                         return -EINVAL;
3356                 }
3357                 ret = of_property_read_string_index(np, propname,
3358                         (2 * i) + 1, &routes[i].source);
3359                 if (ret) {
3360                         dev_err(card->dev,
3361                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3362                                 propname, (2 * i) + 1, ret);
3363                         return -EINVAL;
3364                 }
3365         }
3366 
3367         card->num_of_dapm_routes = num_routes;
3368         card->of_dapm_routes = routes;
3369 
3370         return 0;
3371 }
3372 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3373 
3374 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3375                                      const char *prefix,
3376                                      struct device_node **bitclkmaster,
3377                                      struct device_node **framemaster)
3378 {
3379         int ret, i;
3380         char prop[128];
3381         unsigned int format = 0;
3382         int bit, frame;
3383         const char *str;
3384         struct {
3385                 char *name;
3386                 unsigned int val;
3387         } of_fmt_table[] = {
3388                 { "i2s",        SND_SOC_DAIFMT_I2S },
3389                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
3390                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
3391                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
3392                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
3393                 { "ac97",       SND_SOC_DAIFMT_AC97 },
3394                 { "pdm",        SND_SOC_DAIFMT_PDM},
3395                 { "msb",        SND_SOC_DAIFMT_MSB },
3396                 { "lsb",        SND_SOC_DAIFMT_LSB },
3397         };
3398 
3399         if (!prefix)
3400                 prefix = "";
3401 
3402         /*
3403          * check "[prefix]format = xxx"
3404          * SND_SOC_DAIFMT_FORMAT_MASK area
3405          */
3406         snprintf(prop, sizeof(prop), "%sformat", prefix);
3407         ret = of_property_read_string(np, prop, &str);
3408         if (ret == 0) {
3409                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3410                         if (strcmp(str, of_fmt_table[i].name) == 0) {
3411                                 format |= of_fmt_table[i].val;
3412                                 break;
3413                         }
3414                 }
3415         }
3416 
3417         /*
3418          * check "[prefix]continuous-clock"
3419          * SND_SOC_DAIFMT_CLOCK_MASK area
3420          */
3421         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3422         if (of_get_property(np, prop, NULL))
3423                 format |= SND_SOC_DAIFMT_CONT;
3424         else
3425                 format |= SND_SOC_DAIFMT_GATED;
3426 
3427         /*
3428          * check "[prefix]bitclock-inversion"
3429          * check "[prefix]frame-inversion"
3430          * SND_SOC_DAIFMT_INV_MASK area
3431          */
3432         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3433         bit = !!of_get_property(np, prop, NULL);
3434 
3435         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3436         frame = !!of_get_property(np, prop, NULL);
3437 
3438         switch ((bit << 4) + frame) {
3439         case 0x11:
3440                 format |= SND_SOC_DAIFMT_IB_IF;
3441                 break;
3442         case 0x10:
3443                 format |= SND_SOC_DAIFMT_IB_NF;
3444                 break;
3445         case 0x01:
3446                 format |= SND_SOC_DAIFMT_NB_IF;
3447                 break;
3448         default:
3449                 /* SND_SOC_DAIFMT_NB_NF is default */
3450                 break;
3451         }
3452 
3453         /*
3454          * check "[prefix]bitclock-master"
3455          * check "[prefix]frame-master"
3456          * SND_SOC_DAIFMT_MASTER_MASK area
3457          */
3458         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3459         bit = !!of_get_property(np, prop, NULL);
3460         if (bit && bitclkmaster)
3461                 *bitclkmaster = of_parse_phandle(np, prop, 0);
3462 
3463         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3464         frame = !!of_get_property(np, prop, NULL);
3465         if (frame && framemaster)
3466                 *framemaster = of_parse_phandle(np, prop, 0);
3467 
3468         switch ((bit << 4) + frame) {
3469         case 0x11:
3470                 format |= SND_SOC_DAIFMT_CBM_CFM;
3471                 break;
3472         case 0x10:
3473                 format |= SND_SOC_DAIFMT_CBM_CFS;
3474                 break;
3475         case 0x01:
3476                 format |= SND_SOC_DAIFMT_CBS_CFM;
3477                 break;
3478         default:
3479                 format |= SND_SOC_DAIFMT_CBS_CFS;
3480                 break;
3481         }
3482 
3483         return format;
3484 }
3485 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3486 
3487 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3488                                 const char **dai_name)
3489 {
3490         struct snd_soc_component *pos;
3491         int ret = -EPROBE_DEFER;
3492 
3493         mutex_lock(&client_mutex);
3494         list_for_each_entry(pos, &component_list, list) {
3495                 if (pos->dev->of_node != args->np)
3496                         continue;
3497 
3498                 if (pos->driver->of_xlate_dai_name) {
3499                         ret = pos->driver->of_xlate_dai_name(pos,
3500                                                              args,
3501                                                              dai_name);
3502                 } else {
3503                         int id = -1;
3504 
3505                         switch (args->args_count) {
3506                         case 0:
3507                                 id = 0; /* same as dai_drv[0] */
3508                                 break;
3509                         case 1:
3510                                 id = args->args[0];
3511                                 break;
3512                         default:
3513                                 /* not supported */
3514                                 break;
3515                         }
3516 
3517                         if (id < 0 || id >= pos->num_dai) {
3518                                 ret = -EINVAL;
3519                                 continue;
3520                         }
3521 
3522                         ret = 0;
3523 
3524                         *dai_name = pos->dai_drv[id].name;
3525                         if (!*dai_name)
3526                                 *dai_name = pos->name;
3527                 }
3528 
3529                 break;
3530         }
3531         mutex_unlock(&client_mutex);
3532         return ret;
3533 }
3534 
3535 int snd_soc_of_get_dai_name(struct device_node *of_node,
3536                             const char **dai_name)
3537 {
3538         struct of_phandle_args args;
3539         int ret;
3540 
3541         ret = of_parse_phandle_with_args(of_node, "sound-dai",
3542                                          "#sound-dai-cells", 0, &args);
3543         if (ret)
3544                 return ret;
3545 
3546         ret = snd_soc_get_dai_name(&args, dai_name);
3547 
3548         of_node_put(args.np);
3549 
3550         return ret;
3551 }
3552 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3553 
3554 /*
3555  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3556  * @dev: Card device
3557  * @of_node: Device node
3558  * @dai_link: DAI link
3559  *
3560  * Builds an array of CODEC DAI components from the DAI link property
3561  * 'sound-dai'.
3562  * The array is set in the DAI link and the number of DAIs is set accordingly.
3563  * The device nodes in the array (of_node) must be dereferenced by the caller.
3564  *
3565  * Returns 0 for success
3566  */
3567 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3568                                    struct device_node *of_node,
3569                                    struct snd_soc_dai_link *dai_link)
3570 {
3571         struct of_phandle_args args;
3572         struct snd_soc_dai_link_component *component;
3573         char *name;
3574         int index, num_codecs, ret;
3575 
3576         /* Count the number of CODECs */
3577         name = "sound-dai";
3578         num_codecs = of_count_phandle_with_args(of_node, name,
3579                                                 "#sound-dai-cells");
3580         if (num_codecs <= 0) {
3581                 if (num_codecs == -ENOENT)
3582                         dev_err(dev, "No 'sound-dai' property\n");
3583                 else
3584                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
3585                 return num_codecs;
3586         }
3587         component = devm_kzalloc(dev,
3588                                  sizeof *component * num_codecs,
3589                                  GFP_KERNEL);
3590         if (!component)
3591                 return -ENOMEM;
3592         dai_link->codecs = component;
3593         dai_link->num_codecs = num_codecs;
3594 
3595         /* Parse the list */
3596         for (index = 0, component = dai_link->codecs;
3597              index < dai_link->num_codecs;
3598              index++, component++) {
3599                 ret = of_parse_phandle_with_args(of_node, name,
3600                                                  "#sound-dai-cells",
3601                                                   index, &args);
3602                 if (ret)
3603                         goto err;
3604                 component->of_node = args.np;
3605                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3606                 if (ret < 0)
3607                         goto err;
3608         }
3609         return 0;
3610 err:
3611         for (index = 0, component = dai_link->codecs;
3612              index < dai_link->num_codecs;
3613              index++, component++) {
3614                 if (!component->of_node)
3615                         break;
3616                 of_node_put(component->of_node);
3617                 component->of_node = NULL;
3618         }
3619         dai_link->codecs = NULL;
3620         dai_link->num_codecs = 0;
3621         return ret;
3622 }
3623 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3624 
3625 static int __init snd_soc_init(void)
3626 {
3627         snd_soc_debugfs_init();
3628         snd_soc_util_init();
3629 
3630         return platform_driver_register(&soc_driver);
3631 }
3632 module_init(snd_soc_init);
3633 
3634 static void __exit snd_soc_exit(void)
3635 {
3636         snd_soc_util_exit();
3637         snd_soc_debugfs_exit();
3638 
3639 #ifdef CONFIG_DEBUG_FS
3640 #endif
3641         platform_driver_unregister(&soc_driver);
3642 }
3643 module_exit(snd_soc_exit);
3644 
3645 /* Module information */
3646 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3647 MODULE_DESCRIPTION("ALSA SoC Core");
3648 MODULE_LICENSE("GPL");
3649 MODULE_ALIAS("platform:soc-audio");
3650 

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