Version:  2.0.40 2.2.26 2.4.37 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 4.2

Linux/sound/soc/soc-core.c

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

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