Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5

Linux/sound/soc/soc-core.c

  1 /*
  2  * soc-core.c  --  ALSA SoC Audio Layer
  3  *
  4  * Copyright 2005 Wolfson Microelectronics PLC.
  5  * Copyright 2005 Openedhand Ltd.
  6  * Copyright (C) 2010 Slimlogic Ltd.
  7  * Copyright (C) 2010 Texas Instruments Inc.
  8  *
  9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 10  *         with code, comments and ideas from :-
 11  *         Richard Purdie <richard@openedhand.com>
 12  *
 13  *  This program is free software; you can redistribute  it and/or modify it
 14  *  under  the terms of  the GNU General  Public License as published by the
 15  *  Free Software Foundation;  either version 2 of the  License, or (at your
 16  *  option) any later version.
 17  *
 18  *  TODO:
 19  *   o Add hw rules to enforce rates, etc.
 20  *   o More testing with other codecs/machines.
 21  *   o Add more codecs and platforms to ensure good API coverage.
 22  *   o Support TDM on PCM and I2S
 23  */
 24 
 25 #include <linux/module.h>
 26 #include <linux/moduleparam.h>
 27 #include <linux/init.h>
 28 #include <linux/delay.h>
 29 #include <linux/pm.h>
 30 #include <linux/bitops.h>
 31 #include <linux/debugfs.h>
 32 #include <linux/platform_device.h>
 33 #include <linux/pinctrl/consumer.h>
 34 #include <linux/ctype.h>
 35 #include <linux/slab.h>
 36 #include <linux/of.h>
 37 #include <sound/core.h>
 38 #include <sound/jack.h>
 39 #include <sound/pcm.h>
 40 #include <sound/pcm_params.h>
 41 #include <sound/soc.h>
 42 #include <sound/soc-dpcm.h>
 43 #include <sound/soc-topology.h>
 44 #include <sound/initval.h>
 45 
 46 #define CREATE_TRACE_POINTS
 47 #include <trace/events/asoc.h>
 48 
 49 #define NAME_SIZE       32
 50 
 51 #ifdef CONFIG_DEBUG_FS
 52 struct dentry *snd_soc_debugfs_root;
 53 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
 54 #endif
 55 
 56 static DEFINE_MUTEX(client_mutex);
 57 static LIST_HEAD(platform_list);
 58 static LIST_HEAD(codec_list);
 59 static LIST_HEAD(component_list);
 60 
 61 /*
 62  * This is a timeout to do a DAPM powerdown after a stream is closed().
 63  * It can be used to eliminate pops between different playback streams, e.g.
 64  * between two audio tracks.
 65  */
 66 static int pmdown_time = 5000;
 67 module_param(pmdown_time, int, 0);
 68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
 69 
 70 /* returns the minimum number of bytes needed to represent
 71  * a particular given value */
 72 static int min_bytes_needed(unsigned long val)
 73 {
 74         int c = 0;
 75         int i;
 76 
 77         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
 78                 if (val & (1UL << i))
 79                         break;
 80         c = (sizeof val * 8) - c;
 81         if (!c || (c % 8))
 82                 c = (c + 8) / 8;
 83         else
 84                 c /= 8;
 85         return c;
 86 }
 87 
 88 /* fill buf which is 'len' bytes with a formatted
 89  * string of the form 'reg: value\n' */
 90 static int format_register_str(struct snd_soc_codec *codec,
 91                                unsigned int reg, char *buf, size_t len)
 92 {
 93         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 94         int regsize = codec->driver->reg_word_size * 2;
 95         int ret;
 96 
 97         /* +2 for ': ' and + 1 for '\n' */
 98         if (wordsize + regsize + 2 + 1 != len)
 99                 return -EINVAL;
100 
101         sprintf(buf, "%.*x: ", wordsize, reg);
102         buf += wordsize + 2;
103 
104         ret = snd_soc_read(codec, reg);
105         if (ret < 0)
106                 memset(buf, 'X', regsize);
107         else
108                 sprintf(buf, "%.*x", regsize, ret);
109         buf[regsize] = '\n';
110         /* no NUL-termination needed */
111         return 0;
112 }
113 
114 /* codec register dump */
115 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
116                                   size_t count, loff_t pos)
117 {
118         int i, step = 1;
119         int wordsize, regsize;
120         int len;
121         size_t total = 0;
122         loff_t p = 0;
123 
124         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
125         regsize = codec->driver->reg_word_size * 2;
126 
127         len = wordsize + regsize + 2 + 1;
128 
129         if (!codec->driver->reg_cache_size)
130                 return 0;
131 
132         if (codec->driver->reg_cache_step)
133                 step = codec->driver->reg_cache_step;
134 
135         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
136                 /* only support larger than PAGE_SIZE bytes debugfs
137                  * entries for the default case */
138                 if (p >= pos) {
139                         if (total + len >= count - 1)
140                                 break;
141                         format_register_str(codec, i, buf + total, len);
142                         total += len;
143                 }
144                 p += len;
145         }
146 
147         total = min(total, count - 1);
148 
149         return total;
150 }
151 
152 static ssize_t codec_reg_show(struct device *dev,
153         struct device_attribute *attr, char *buf)
154 {
155         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
156 
157         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
158 }
159 
160 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
161 
162 static ssize_t pmdown_time_show(struct device *dev,
163                                 struct device_attribute *attr, char *buf)
164 {
165         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
166 
167         return sprintf(buf, "%ld\n", rtd->pmdown_time);
168 }
169 
170 static ssize_t pmdown_time_set(struct device *dev,
171                                struct device_attribute *attr,
172                                const char *buf, size_t count)
173 {
174         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
175         int ret;
176 
177         ret = kstrtol(buf, 10, &rtd->pmdown_time);
178         if (ret)
179                 return ret;
180 
181         return count;
182 }
183 
184 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
185 
186 static struct attribute *soc_dev_attrs[] = {
187         &dev_attr_codec_reg.attr,
188         &dev_attr_pmdown_time.attr,
189         NULL
190 };
191 
192 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
193                                        struct attribute *attr, int idx)
194 {
195         struct device *dev = kobj_to_dev(kobj);
196         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
197 
198         if (attr == &dev_attr_pmdown_time.attr)
199                 return attr->mode; /* always visible */
200         return rtd->codec ? attr->mode : 0; /* enabled only with codec */
201 }
202 
203 static const struct attribute_group soc_dapm_dev_group = {
204         .attrs = soc_dapm_dev_attrs,
205         .is_visible = soc_dev_attr_is_visible,
206 };
207 
208 static const struct attribute_group soc_dev_roup = {
209         .attrs = soc_dev_attrs,
210         .is_visible = soc_dev_attr_is_visible,
211 };
212 
213 static const struct attribute_group *soc_dev_attr_groups[] = {
214         &soc_dapm_dev_group,
215         &soc_dev_roup,
216         NULL
217 };
218 
219 #ifdef CONFIG_DEBUG_FS
220 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
221                                    size_t count, loff_t *ppos)
222 {
223         ssize_t ret;
224         struct snd_soc_codec *codec = file->private_data;
225         char *buf;
226 
227         if (*ppos < 0 || !count)
228                 return -EINVAL;
229 
230         buf = kmalloc(count, GFP_KERNEL);
231         if (!buf)
232                 return -ENOMEM;
233 
234         ret = soc_codec_reg_show(codec, buf, count, *ppos);
235         if (ret >= 0) {
236                 if (copy_to_user(user_buf, buf, ret)) {
237                         kfree(buf);
238                         return -EFAULT;
239                 }
240                 *ppos += ret;
241         }
242 
243         kfree(buf);
244         return ret;
245 }
246 
247 static ssize_t codec_reg_write_file(struct file *file,
248                 const char __user *user_buf, size_t count, loff_t *ppos)
249 {
250         char buf[32];
251         size_t buf_size;
252         char *start = buf;
253         unsigned long reg, value;
254         struct snd_soc_codec *codec = file->private_data;
255         int ret;
256 
257         buf_size = min(count, (sizeof(buf)-1));
258         if (copy_from_user(buf, user_buf, buf_size))
259                 return -EFAULT;
260         buf[buf_size] = 0;
261 
262         while (*start == ' ')
263                 start++;
264         reg = simple_strtoul(start, &start, 16);
265         while (*start == ' ')
266                 start++;
267         ret = kstrtoul(start, 16, &value);
268         if (ret)
269                 return ret;
270 
271         /* Userspace has been fiddling around behind the kernel's back */
272         add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
273 
274         snd_soc_write(codec, reg, value);
275         return buf_size;
276 }
277 
278 static const struct file_operations codec_reg_fops = {
279         .open = simple_open,
280         .read = codec_reg_read_file,
281         .write = codec_reg_write_file,
282         .llseek = default_llseek,
283 };
284 
285 static void soc_init_component_debugfs(struct snd_soc_component *component)
286 {
287         if (!component->card->debugfs_card_root)
288                 return;
289 
290         if (component->debugfs_prefix) {
291                 char *name;
292 
293                 name = kasprintf(GFP_KERNEL, "%s:%s",
294                         component->debugfs_prefix, component->name);
295                 if (name) {
296                         component->debugfs_root = debugfs_create_dir(name,
297                                 component->card->debugfs_card_root);
298                         kfree(name);
299                 }
300         } else {
301                 component->debugfs_root = debugfs_create_dir(component->name,
302                                 component->card->debugfs_card_root);
303         }
304 
305         if (!component->debugfs_root) {
306                 dev_warn(component->dev,
307                         "ASoC: Failed to create component debugfs directory\n");
308                 return;
309         }
310 
311         snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
312                 component->debugfs_root);
313 
314         if (component->init_debugfs)
315                 component->init_debugfs(component);
316 }
317 
318 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
319 {
320         debugfs_remove_recursive(component->debugfs_root);
321 }
322 
323 static void soc_init_codec_debugfs(struct snd_soc_component *component)
324 {
325         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
326 
327         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
328                                                  codec->component.debugfs_root,
329                                                  codec, &codec_reg_fops);
330         if (!codec->debugfs_reg)
331                 dev_warn(codec->dev,
332                         "ASoC: Failed to create codec register debugfs file\n");
333 }
334 
335 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
336                                     size_t count, loff_t *ppos)
337 {
338         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
339         ssize_t len, ret = 0;
340         struct snd_soc_codec *codec;
341 
342         if (!buf)
343                 return -ENOMEM;
344 
345         mutex_lock(&client_mutex);
346 
347         list_for_each_entry(codec, &codec_list, list) {
348                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
349                                codec->component.name);
350                 if (len >= 0)
351                         ret += len;
352                 if (ret > PAGE_SIZE) {
353                         ret = PAGE_SIZE;
354                         break;
355                 }
356         }
357 
358         mutex_unlock(&client_mutex);
359 
360         if (ret >= 0)
361                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
362 
363         kfree(buf);
364 
365         return ret;
366 }
367 
368 static const struct file_operations codec_list_fops = {
369         .read = codec_list_read_file,
370         .llseek = default_llseek,/* read accesses f_pos */
371 };
372 
373 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
374                                   size_t count, loff_t *ppos)
375 {
376         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
377         ssize_t len, ret = 0;
378         struct snd_soc_component *component;
379         struct snd_soc_dai *dai;
380 
381         if (!buf)
382                 return -ENOMEM;
383 
384         mutex_lock(&client_mutex);
385 
386         list_for_each_entry(component, &component_list, list) {
387                 list_for_each_entry(dai, &component->dai_list, list) {
388                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
389                                 dai->name);
390                         if (len >= 0)
391                                 ret += len;
392                         if (ret > PAGE_SIZE) {
393                                 ret = PAGE_SIZE;
394                                 break;
395                         }
396                 }
397         }
398 
399         mutex_unlock(&client_mutex);
400 
401         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402 
403         kfree(buf);
404 
405         return ret;
406 }
407 
408 static const struct file_operations dai_list_fops = {
409         .read = dai_list_read_file,
410         .llseek = default_llseek,/* read accesses f_pos */
411 };
412 
413 static ssize_t platform_list_read_file(struct file *file,
414                                        char __user *user_buf,
415                                        size_t count, loff_t *ppos)
416 {
417         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
418         ssize_t len, ret = 0;
419         struct snd_soc_platform *platform;
420 
421         if (!buf)
422                 return -ENOMEM;
423 
424         mutex_lock(&client_mutex);
425 
426         list_for_each_entry(platform, &platform_list, list) {
427                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
428                                platform->component.name);
429                 if (len >= 0)
430                         ret += len;
431                 if (ret > PAGE_SIZE) {
432                         ret = PAGE_SIZE;
433                         break;
434                 }
435         }
436 
437         mutex_unlock(&client_mutex);
438 
439         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
440 
441         kfree(buf);
442 
443         return ret;
444 }
445 
446 static const struct file_operations platform_list_fops = {
447         .read = platform_list_read_file,
448         .llseek = default_llseek,/* read accesses f_pos */
449 };
450 
451 static void soc_init_card_debugfs(struct snd_soc_card *card)
452 {
453         if (!snd_soc_debugfs_root)
454                 return;
455 
456         card->debugfs_card_root = debugfs_create_dir(card->name,
457                                                      snd_soc_debugfs_root);
458         if (!card->debugfs_card_root) {
459                 dev_warn(card->dev,
460                          "ASoC: Failed to create card debugfs directory\n");
461                 return;
462         }
463 
464         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
465                                                     card->debugfs_card_root,
466                                                     &card->pop_time);
467         if (!card->debugfs_pop_time)
468                 dev_warn(card->dev,
469                        "ASoC: Failed to create pop time debugfs file\n");
470 }
471 
472 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
473 {
474         debugfs_remove_recursive(card->debugfs_card_root);
475 }
476 
477 
478 static void snd_soc_debugfs_init(void)
479 {
480         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
481         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
482                 pr_warn("ASoC: Failed to create debugfs directory\n");
483                 snd_soc_debugfs_root = NULL;
484                 return;
485         }
486 
487         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
488                                  &codec_list_fops))
489                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
490 
491         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
492                                  &dai_list_fops))
493                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
494 
495         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
496                                  &platform_list_fops))
497                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
498 }
499 
500 static void snd_soc_debugfs_exit(void)
501 {
502         debugfs_remove_recursive(snd_soc_debugfs_root);
503 }
504 
505 #else
506 
507 #define soc_init_codec_debugfs NULL
508 
509 static inline void soc_init_component_debugfs(
510         struct snd_soc_component *component)
511 {
512 }
513 
514 static inline void soc_cleanup_component_debugfs(
515         struct snd_soc_component *component)
516 {
517 }
518 
519 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
520 {
521 }
522 
523 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
524 {
525 }
526 
527 static inline void snd_soc_debugfs_init(void)
528 {
529 }
530 
531 static inline void snd_soc_debugfs_exit(void)
532 {
533 }
534 
535 #endif
536 
537 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
538                 const char *dai_link, int stream)
539 {
540         struct snd_soc_pcm_runtime *rtd;
541 
542         list_for_each_entry(rtd, &card->rtd_list, list) {
543                 if (rtd->dai_link->no_pcm &&
544                         !strcmp(rtd->dai_link->name, dai_link))
545                         return rtd->pcm->streams[stream].substream;
546         }
547         dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
548         return NULL;
549 }
550 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
551 
552 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
553         struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
554 {
555         struct snd_soc_pcm_runtime *rtd;
556 
557         rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
558         if (!rtd)
559                 return NULL;
560 
561         rtd->card = card;
562         rtd->dai_link = dai_link;
563         rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
564                                         dai_link->num_codecs,
565                                         GFP_KERNEL);
566         if (!rtd->codec_dais) {
567                 kfree(rtd);
568                 return NULL;
569         }
570 
571         return rtd;
572 }
573 
574 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
575 {
576         if (rtd && rtd->codec_dais)
577                 kfree(rtd->codec_dais);
578         kfree(rtd);
579 }
580 
581 static void soc_add_pcm_runtime(struct snd_soc_card *card,
582                 struct snd_soc_pcm_runtime *rtd)
583 {
584         list_add_tail(&rtd->list, &card->rtd_list);
585         rtd->num = card->num_rtd;
586         card->num_rtd++;
587 }
588 
589 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
590 {
591         struct snd_soc_pcm_runtime *rtd, *_rtd;
592 
593         list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
594                 list_del(&rtd->list);
595                 soc_free_pcm_runtime(rtd);
596         }
597 
598         card->num_rtd = 0;
599 }
600 
601 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
602                 const char *dai_link)
603 {
604         struct snd_soc_pcm_runtime *rtd;
605 
606         list_for_each_entry(rtd, &card->rtd_list, list) {
607                 if (!strcmp(rtd->dai_link->name, dai_link))
608                         return rtd;
609         }
610         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
611         return NULL;
612 }
613 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
614 
615 static void codec2codec_close_delayed_work(struct work_struct *work)
616 {
617         /* Currently nothing to do for c2c links
618          * Since c2c links are internal nodes in the DAPM graph and
619          * don't interface with the outside world or application layer
620          * we don't have to do any special handling on close.
621          */
622 }
623 
624 #ifdef CONFIG_PM_SLEEP
625 /* powers down audio subsystem for suspend */
626 int snd_soc_suspend(struct device *dev)
627 {
628         struct snd_soc_card *card = dev_get_drvdata(dev);
629         struct snd_soc_codec *codec;
630         struct snd_soc_pcm_runtime *rtd;
631         int i;
632 
633         /* If the card is not initialized yet there is nothing to do */
634         if (!card->instantiated)
635                 return 0;
636 
637         /* Due to the resume being scheduled into a workqueue we could
638         * suspend before that's finished - wait for it to complete.
639          */
640         snd_power_lock(card->snd_card);
641         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
642         snd_power_unlock(card->snd_card);
643 
644         /* we're going to block userspace touching us until resume completes */
645         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
646 
647         /* mute any active DACs */
648         list_for_each_entry(rtd, &card->rtd_list, list) {
649 
650                 if (rtd->dai_link->ignore_suspend)
651                         continue;
652 
653                 for (i = 0; i < rtd->num_codecs; i++) {
654                         struct snd_soc_dai *dai = rtd->codec_dais[i];
655                         struct snd_soc_dai_driver *drv = dai->driver;
656 
657                         if (drv->ops->digital_mute && dai->playback_active)
658                                 drv->ops->digital_mute(dai, 1);
659                 }
660         }
661 
662         /* suspend all pcms */
663         list_for_each_entry(rtd, &card->rtd_list, list) {
664                 if (rtd->dai_link->ignore_suspend)
665                         continue;
666 
667                 snd_pcm_suspend_all(rtd->pcm);
668         }
669 
670         if (card->suspend_pre)
671                 card->suspend_pre(card);
672 
673         list_for_each_entry(rtd, &card->rtd_list, list) {
674                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
675 
676                 if (rtd->dai_link->ignore_suspend)
677                         continue;
678 
679                 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
680                         cpu_dai->driver->suspend(cpu_dai);
681         }
682 
683         /* close any waiting streams */
684         list_for_each_entry(rtd, &card->rtd_list, list)
685                 flush_delayed_work(&rtd->delayed_work);
686 
687         list_for_each_entry(rtd, &card->rtd_list, list) {
688 
689                 if (rtd->dai_link->ignore_suspend)
690                         continue;
691 
692                 snd_soc_dapm_stream_event(rtd,
693                                           SNDRV_PCM_STREAM_PLAYBACK,
694                                           SND_SOC_DAPM_STREAM_SUSPEND);
695 
696                 snd_soc_dapm_stream_event(rtd,
697                                           SNDRV_PCM_STREAM_CAPTURE,
698                                           SND_SOC_DAPM_STREAM_SUSPEND);
699         }
700 
701         /* Recheck all endpoints too, their state is affected by suspend */
702         dapm_mark_endpoints_dirty(card);
703         snd_soc_dapm_sync(&card->dapm);
704 
705         /* suspend all CODECs */
706         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
707                 struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
708 
709                 /* If there are paths active then the CODEC will be held with
710                  * bias _ON and should not be suspended. */
711                 if (!codec->suspended) {
712                         switch (snd_soc_dapm_get_bias_level(dapm)) {
713                         case SND_SOC_BIAS_STANDBY:
714                                 /*
715                                  * If the CODEC is capable of idle
716                                  * bias off then being in STANDBY
717                                  * means it's doing something,
718                                  * otherwise fall through.
719                                  */
720                                 if (dapm->idle_bias_off) {
721                                         dev_dbg(codec->dev,
722                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
723                                         break;
724                                 }
725 
726                         case SND_SOC_BIAS_OFF:
727                                 if (codec->driver->suspend)
728                                         codec->driver->suspend(codec);
729                                 codec->suspended = 1;
730                                 if (codec->component.regmap)
731                                         regcache_mark_dirty(codec->component.regmap);
732                                 /* deactivate pins to sleep state */
733                                 pinctrl_pm_select_sleep_state(codec->dev);
734                                 break;
735                         default:
736                                 dev_dbg(codec->dev,
737                                         "ASoC: CODEC is on over suspend\n");
738                                 break;
739                         }
740                 }
741         }
742 
743         list_for_each_entry(rtd, &card->rtd_list, list) {
744                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
745 
746                 if (rtd->dai_link->ignore_suspend)
747                         continue;
748 
749                 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
750                         cpu_dai->driver->suspend(cpu_dai);
751 
752                 /* deactivate pins to sleep state */
753                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
754         }
755 
756         if (card->suspend_post)
757                 card->suspend_post(card);
758 
759         return 0;
760 }
761 EXPORT_SYMBOL_GPL(snd_soc_suspend);
762 
763 /* deferred resume work, so resume can complete before we finished
764  * setting our codec back up, which can be very slow on I2C
765  */
766 static void soc_resume_deferred(struct work_struct *work)
767 {
768         struct snd_soc_card *card =
769                         container_of(work, struct snd_soc_card, deferred_resume_work);
770         struct snd_soc_pcm_runtime *rtd;
771         struct snd_soc_codec *codec;
772         int i;
773 
774         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
775          * so userspace apps are blocked from touching us
776          */
777 
778         dev_dbg(card->dev, "ASoC: starting resume work\n");
779 
780         /* Bring us up into D2 so that DAPM starts enabling things */
781         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
782 
783         if (card->resume_pre)
784                 card->resume_pre(card);
785 
786         /* resume control bus DAIs */
787         list_for_each_entry(rtd, &card->rtd_list, list) {
788                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
789 
790                 if (rtd->dai_link->ignore_suspend)
791                         continue;
792 
793                 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
794                         cpu_dai->driver->resume(cpu_dai);
795         }
796 
797         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
798                 if (codec->suspended) {
799                         if (codec->driver->resume)
800                                 codec->driver->resume(codec);
801                         codec->suspended = 0;
802                 }
803         }
804 
805         list_for_each_entry(rtd, &card->rtd_list, list) {
806 
807                 if (rtd->dai_link->ignore_suspend)
808                         continue;
809 
810                 snd_soc_dapm_stream_event(rtd,
811                                           SNDRV_PCM_STREAM_PLAYBACK,
812                                           SND_SOC_DAPM_STREAM_RESUME);
813 
814                 snd_soc_dapm_stream_event(rtd,
815                                           SNDRV_PCM_STREAM_CAPTURE,
816                                           SND_SOC_DAPM_STREAM_RESUME);
817         }
818 
819         /* unmute any active DACs */
820         list_for_each_entry(rtd, &card->rtd_list, list) {
821 
822                 if (rtd->dai_link->ignore_suspend)
823                         continue;
824 
825                 for (i = 0; i < rtd->num_codecs; i++) {
826                         struct snd_soc_dai *dai = rtd->codec_dais[i];
827                         struct snd_soc_dai_driver *drv = dai->driver;
828 
829                         if (drv->ops->digital_mute && dai->playback_active)
830                                 drv->ops->digital_mute(dai, 0);
831                 }
832         }
833 
834         list_for_each_entry(rtd, &card->rtd_list, list) {
835                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
836 
837                 if (rtd->dai_link->ignore_suspend)
838                         continue;
839 
840                 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
841                         cpu_dai->driver->resume(cpu_dai);
842         }
843 
844         if (card->resume_post)
845                 card->resume_post(card);
846 
847         dev_dbg(card->dev, "ASoC: resume work completed\n");
848 
849         /* Recheck all endpoints too, their state is affected by suspend */
850         dapm_mark_endpoints_dirty(card);
851         snd_soc_dapm_sync(&card->dapm);
852 
853         /* userspace can access us now we are back as we were before */
854         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
855 }
856 
857 /* powers up audio subsystem after a suspend */
858 int snd_soc_resume(struct device *dev)
859 {
860         struct snd_soc_card *card = dev_get_drvdata(dev);
861         bool bus_control = false;
862         struct snd_soc_pcm_runtime *rtd;
863 
864         /* If the card is not initialized yet there is nothing to do */
865         if (!card->instantiated)
866                 return 0;
867 
868         /* activate pins from sleep state */
869         list_for_each_entry(rtd, &card->rtd_list, list) {
870                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
871                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
872                 int j;
873 
874                 if (cpu_dai->active)
875                         pinctrl_pm_select_default_state(cpu_dai->dev);
876 
877                 for (j = 0; j < rtd->num_codecs; j++) {
878                         struct snd_soc_dai *codec_dai = codec_dais[j];
879                         if (codec_dai->active)
880                                 pinctrl_pm_select_default_state(codec_dai->dev);
881                 }
882         }
883 
884         /*
885          * DAIs that also act as the control bus master might have other drivers
886          * hanging off them so need to resume immediately. Other drivers don't
887          * have that problem and may take a substantial amount of time to resume
888          * due to I/O costs and anti-pop so handle them out of line.
889          */
890         list_for_each_entry(rtd, &card->rtd_list, list) {
891                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
892                 bus_control |= cpu_dai->driver->bus_control;
893         }
894         if (bus_control) {
895                 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
896                 soc_resume_deferred(&card->deferred_resume_work);
897         } else {
898                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
899                 if (!schedule_work(&card->deferred_resume_work))
900                         dev_err(dev, "ASoC: resume work item may be lost\n");
901         }
902 
903         return 0;
904 }
905 EXPORT_SYMBOL_GPL(snd_soc_resume);
906 #else
907 #define snd_soc_suspend NULL
908 #define snd_soc_resume NULL
909 #endif
910 
911 static const struct snd_soc_dai_ops null_dai_ops = {
912 };
913 
914 static struct snd_soc_component *soc_find_component(
915         const struct device_node *of_node, const char *name)
916 {
917         struct snd_soc_component *component;
918 
919         lockdep_assert_held(&client_mutex);
920 
921         list_for_each_entry(component, &component_list, list) {
922                 if (of_node) {
923                         if (component->dev->of_node == of_node)
924                                 return component;
925                 } else if (strcmp(component->name, name) == 0) {
926                         return component;
927                 }
928         }
929 
930         return NULL;
931 }
932 
933 static struct snd_soc_dai *snd_soc_find_dai(
934         const struct snd_soc_dai_link_component *dlc)
935 {
936         struct snd_soc_component *component;
937         struct snd_soc_dai *dai;
938         struct device_node *component_of_node;
939 
940         lockdep_assert_held(&client_mutex);
941 
942         /* Find CPU DAI from registered DAIs*/
943         list_for_each_entry(component, &component_list, list) {
944                 component_of_node = component->dev->of_node;
945                 if (!component_of_node && component->dev->parent)
946                         component_of_node = component->dev->parent->of_node;
947 
948                 if (dlc->of_node && component_of_node != dlc->of_node)
949                         continue;
950                 if (dlc->name && strcmp(component->name, dlc->name))
951                         continue;
952                 list_for_each_entry(dai, &component->dai_list, list) {
953                         if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
954                                 continue;
955 
956                         return dai;
957                 }
958         }
959 
960         return NULL;
961 }
962 
963 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
964                 struct snd_soc_dai_link *dai_link)
965 {
966         struct snd_soc_pcm_runtime *rtd;
967 
968         list_for_each_entry(rtd, &card->rtd_list, list) {
969                 if (rtd->dai_link == dai_link)
970                         return true;
971         }
972 
973         return false;
974 }
975 
976 static int soc_bind_dai_link(struct snd_soc_card *card,
977         struct snd_soc_dai_link *dai_link)
978 {
979         struct snd_soc_pcm_runtime *rtd;
980         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
981         struct snd_soc_dai_link_component cpu_dai_component;
982         struct snd_soc_dai **codec_dais;
983         struct snd_soc_platform *platform;
984         const char *platform_name;
985         int i;
986 
987         dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
988 
989         rtd = soc_new_pcm_runtime(card, dai_link);
990         if (!rtd)
991                 return -ENOMEM;
992 
993         if (soc_is_dai_link_bound(card, dai_link)) {
994                 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
995                         dai_link->name);
996                 return 0;
997         }
998 
999         cpu_dai_component.name = dai_link->cpu_name;
1000         cpu_dai_component.of_node = dai_link->cpu_of_node;
1001         cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1002         rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1003         if (!rtd->cpu_dai) {
1004                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1005                         dai_link->cpu_dai_name);
1006                 goto _err_defer;
1007         }
1008 
1009         rtd->num_codecs = dai_link->num_codecs;
1010 
1011         /* Find CODEC from registered CODECs */
1012         codec_dais = rtd->codec_dais;
1013         for (i = 0; i < rtd->num_codecs; i++) {
1014                 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1015                 if (!codec_dais[i]) {
1016                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1017                                 codecs[i].dai_name);
1018                         goto _err_defer;
1019                 }
1020         }
1021 
1022         /* Single codec links expect codec and codec_dai in runtime data */
1023         rtd->codec_dai = codec_dais[0];
1024         rtd->codec = rtd->codec_dai->codec;
1025 
1026         /* if there's no platform we match on the empty platform */
1027         platform_name = dai_link->platform_name;
1028         if (!platform_name && !dai_link->platform_of_node)
1029                 platform_name = "snd-soc-dummy";
1030 
1031         /* find one from the set of registered platforms */
1032         list_for_each_entry(platform, &platform_list, list) {
1033                 if (dai_link->platform_of_node) {
1034                         if (platform->dev->of_node !=
1035                             dai_link->platform_of_node)
1036                                 continue;
1037                 } else {
1038                         if (strcmp(platform->component.name, platform_name))
1039                                 continue;
1040                 }
1041 
1042                 rtd->platform = platform;
1043         }
1044         if (!rtd->platform) {
1045                 dev_err(card->dev, "ASoC: platform %s not registered\n",
1046                         dai_link->platform_name);
1047                 return -EPROBE_DEFER;
1048         }
1049 
1050         soc_add_pcm_runtime(card, rtd);
1051         return 0;
1052 
1053 _err_defer:
1054         soc_free_pcm_runtime(rtd);
1055         return  -EPROBE_DEFER;
1056 }
1057 
1058 static void soc_remove_component(struct snd_soc_component *component)
1059 {
1060         if (!component->card)
1061                 return;
1062 
1063         /* This is a HACK and will be removed soon */
1064         if (component->codec)
1065                 list_del(&component->codec->card_list);
1066 
1067         if (component->remove)
1068                 component->remove(component);
1069 
1070         snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1071 
1072         soc_cleanup_component_debugfs(component);
1073         component->card = NULL;
1074         module_put(component->dev->driver->owner);
1075 }
1076 
1077 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1078 {
1079         int err;
1080 
1081         if (dai && dai->probed &&
1082                         dai->driver->remove_order == order) {
1083                 if (dai->driver->remove) {
1084                         err = dai->driver->remove(dai);
1085                         if (err < 0)
1086                                 dev_err(dai->dev,
1087                                         "ASoC: failed to remove %s: %d\n",
1088                                         dai->name, err);
1089                 }
1090                 dai->probed = 0;
1091         }
1092 }
1093 
1094 static void soc_remove_link_dais(struct snd_soc_card *card,
1095                 struct snd_soc_pcm_runtime *rtd, int order)
1096 {
1097         int i;
1098 
1099         /* unregister the rtd device */
1100         if (rtd->dev_registered) {
1101                 device_unregister(rtd->dev);
1102                 rtd->dev_registered = 0;
1103         }
1104 
1105         /* remove the CODEC DAI */
1106         for (i = 0; i < rtd->num_codecs; i++)
1107                 soc_remove_dai(rtd->codec_dais[i], order);
1108 
1109         soc_remove_dai(rtd->cpu_dai, order);
1110 }
1111 
1112 static void soc_remove_link_components(struct snd_soc_card *card,
1113         struct snd_soc_pcm_runtime *rtd, int order)
1114 {
1115         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1116         struct snd_soc_platform *platform = rtd->platform;
1117         struct snd_soc_component *component;
1118         int i;
1119 
1120         /* remove the platform */
1121         if (platform && platform->component.driver->remove_order == order)
1122                 soc_remove_component(&platform->component);
1123 
1124         /* remove the CODEC-side CODEC */
1125         for (i = 0; i < rtd->num_codecs; i++) {
1126                 component = rtd->codec_dais[i]->component;
1127                 if (component->driver->remove_order == order)
1128                         soc_remove_component(component);
1129         }
1130 
1131         /* remove any CPU-side CODEC */
1132         if (cpu_dai) {
1133                 if (cpu_dai->component->driver->remove_order == order)
1134                         soc_remove_component(cpu_dai->component);
1135         }
1136 }
1137 
1138 static void soc_remove_dai_links(struct snd_soc_card *card)
1139 {
1140         int order;
1141         struct snd_soc_pcm_runtime *rtd;
1142         struct snd_soc_dai_link *link, *_link;
1143 
1144         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1145                         order++) {
1146                 list_for_each_entry(rtd, &card->rtd_list, list)
1147                         soc_remove_link_dais(card, rtd, order);
1148         }
1149 
1150         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1151                         order++) {
1152                 list_for_each_entry(rtd, &card->rtd_list, list)
1153                         soc_remove_link_components(card, rtd, order);
1154         }
1155 
1156         list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1157                 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1158                         dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1159                                 link->name);
1160 
1161                 list_del(&link->list);
1162                 card->num_dai_links--;
1163         }
1164 }
1165 
1166 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1167                                    struct snd_soc_dai_link *dai_link)
1168 {
1169         /* Legacy codec/codec_dai link is a single entry in multicodec */
1170         if (dai_link->codec_name || dai_link->codec_of_node ||
1171             dai_link->codec_dai_name) {
1172                 dai_link->num_codecs = 1;
1173 
1174                 dai_link->codecs = devm_kzalloc(card->dev,
1175                                 sizeof(struct snd_soc_dai_link_component),
1176                                 GFP_KERNEL);
1177                 if (!dai_link->codecs)
1178                         return -ENOMEM;
1179 
1180                 dai_link->codecs[0].name = dai_link->codec_name;
1181                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1182                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1183         }
1184 
1185         if (!dai_link->codecs) {
1186                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1187                 return -EINVAL;
1188         }
1189 
1190         return 0;
1191 }
1192 
1193 static int soc_init_dai_link(struct snd_soc_card *card,
1194                                    struct snd_soc_dai_link *link)
1195 {
1196         int i, ret;
1197 
1198         ret = snd_soc_init_multicodec(card, link);
1199         if (ret) {
1200                 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1201                 return ret;
1202         }
1203 
1204         for (i = 0; i < link->num_codecs; i++) {
1205                 /*
1206                  * Codec must be specified by 1 of name or OF node,
1207                  * not both or neither.
1208                  */
1209                 if (!!link->codecs[i].name ==
1210                     !!link->codecs[i].of_node) {
1211                         dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1212                                 link->name);
1213                         return -EINVAL;
1214                 }
1215                 /* Codec DAI name must be specified */
1216                 if (!link->codecs[i].dai_name) {
1217                         dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1218                                 link->name);
1219                         return -EINVAL;
1220                 }
1221         }
1222 
1223         /*
1224          * Platform may be specified by either name or OF node, but
1225          * can be left unspecified, and a dummy platform will be used.
1226          */
1227         if (link->platform_name && link->platform_of_node) {
1228                 dev_err(card->dev,
1229                         "ASoC: Both platform name/of_node are set for %s\n",
1230                         link->name);
1231                 return -EINVAL;
1232         }
1233 
1234         /*
1235          * CPU device may be specified by either name or OF node, but
1236          * can be left unspecified, and will be matched based on DAI
1237          * name alone..
1238          */
1239         if (link->cpu_name && link->cpu_of_node) {
1240                 dev_err(card->dev,
1241                         "ASoC: Neither/both cpu name/of_node are set for %s\n",
1242                         link->name);
1243                 return -EINVAL;
1244         }
1245         /*
1246          * At least one of CPU DAI name or CPU device name/node must be
1247          * specified
1248          */
1249         if (!link->cpu_dai_name &&
1250             !(link->cpu_name || link->cpu_of_node)) {
1251                 dev_err(card->dev,
1252                         "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1253                         link->name);
1254                 return -EINVAL;
1255         }
1256 
1257         return 0;
1258 }
1259 
1260 /**
1261  * snd_soc_add_dai_link - Add a DAI link dynamically
1262  * @card: The ASoC card to which the DAI link is added
1263  * @dai_link: The new DAI link to add
1264  *
1265  * This function adds a DAI link to the ASoC card's link list.
1266  *
1267  * Note: Topology can use this API to add DAI links when probing the
1268  * topology component. And machine drivers can still define static
1269  * DAI links in dai_link array.
1270  */
1271 int snd_soc_add_dai_link(struct snd_soc_card *card,
1272                 struct snd_soc_dai_link *dai_link)
1273 {
1274         if (dai_link->dobj.type
1275             && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1276                 dev_err(card->dev, "Invalid dai link type %d\n",
1277                         dai_link->dobj.type);
1278                 return -EINVAL;
1279         }
1280 
1281         lockdep_assert_held(&client_mutex);
1282         /* Notify the machine driver for extra initialization
1283          * on the link created by topology.
1284          */
1285         if (dai_link->dobj.type && card->add_dai_link)
1286                 card->add_dai_link(card, dai_link);
1287 
1288         list_add_tail(&dai_link->list, &card->dai_link_list);
1289         card->num_dai_links++;
1290 
1291         return 0;
1292 }
1293 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1294 
1295 /**
1296  * snd_soc_remove_dai_link - Remove a DAI link from the list
1297  * @card: The ASoC card that owns the link
1298  * @dai_link: The DAI link to remove
1299  *
1300  * This function removes a DAI link from the ASoC card's link list.
1301  *
1302  * For DAI links previously added by topology, topology should
1303  * remove them by using the dobj embedded in the link.
1304  */
1305 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1306                              struct snd_soc_dai_link *dai_link)
1307 {
1308         struct snd_soc_dai_link *link, *_link;
1309 
1310         if (dai_link->dobj.type
1311             && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1312                 dev_err(card->dev, "Invalid dai link type %d\n",
1313                         dai_link->dobj.type);
1314                 return;
1315         }
1316 
1317         lockdep_assert_held(&client_mutex);
1318         /* Notify the machine driver for extra destruction
1319          * on the link created by topology.
1320          */
1321         if (dai_link->dobj.type && card->remove_dai_link)
1322                 card->remove_dai_link(card, dai_link);
1323 
1324         list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1325                 if (link == dai_link) {
1326                         list_del(&link->list);
1327                         card->num_dai_links--;
1328                         return;
1329                 }
1330         }
1331 }
1332 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1333 
1334 static void soc_set_name_prefix(struct snd_soc_card *card,
1335                                 struct snd_soc_component *component)
1336 {
1337         int i;
1338 
1339         if (card->codec_conf == NULL)
1340                 return;
1341 
1342         for (i = 0; i < card->num_configs; i++) {
1343                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1344                 if (map->of_node && component->dev->of_node != map->of_node)
1345                         continue;
1346                 if (map->dev_name && strcmp(component->name, map->dev_name))
1347                         continue;
1348                 component->name_prefix = map->name_prefix;
1349                 break;
1350         }
1351 }
1352 
1353 static int soc_probe_component(struct snd_soc_card *card,
1354         struct snd_soc_component *component)
1355 {
1356         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1357         struct snd_soc_dai *dai;
1358         int ret;
1359 
1360         if (!strcmp(component->name, "snd-soc-dummy"))
1361                 return 0;
1362 
1363         if (component->card) {
1364                 if (component->card != card) {
1365                         dev_err(component->dev,
1366                                 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1367                                 card->name, component->card->name);
1368                         return -ENODEV;
1369                 }
1370                 return 0;
1371         }
1372 
1373         if (!try_module_get(component->dev->driver->owner))
1374                 return -ENODEV;
1375 
1376         component->card = card;
1377         dapm->card = card;
1378         soc_set_name_prefix(card, component);
1379 
1380         soc_init_component_debugfs(component);
1381 
1382         if (component->dapm_widgets) {
1383                 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1384                         component->num_dapm_widgets);
1385 
1386                 if (ret != 0) {
1387                         dev_err(component->dev,
1388                                 "Failed to create new controls %d\n", ret);
1389                         goto err_probe;
1390                 }
1391         }
1392 
1393         list_for_each_entry(dai, &component->dai_list, list) {
1394                 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1395                 if (ret != 0) {
1396                         dev_err(component->dev,
1397                                 "Failed to create DAI widgets %d\n", ret);
1398                         goto err_probe;
1399                 }
1400         }
1401 
1402         if (component->probe) {
1403                 ret = component->probe(component);
1404                 if (ret < 0) {
1405                         dev_err(component->dev,
1406                                 "ASoC: failed to probe component %d\n", ret);
1407                         goto err_probe;
1408                 }
1409 
1410                 WARN(dapm->idle_bias_off &&
1411                         dapm->bias_level != SND_SOC_BIAS_OFF,
1412                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1413                         component->name);
1414         }
1415 
1416         /* machine specific init */
1417         if (component->init) {
1418                 ret = component->init(component);
1419                 if (ret < 0) {
1420                         dev_err(component->dev,
1421                                 "Failed to do machine specific init %d\n", ret);
1422                         goto err_probe;
1423                 }
1424         }
1425 
1426         if (component->controls)
1427                 snd_soc_add_component_controls(component, component->controls,
1428                                      component->num_controls);
1429         if (component->dapm_routes)
1430                 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1431                                         component->num_dapm_routes);
1432 
1433         list_add(&dapm->list, &card->dapm_list);
1434 
1435         /* This is a HACK and will be removed soon */
1436         if (component->codec)
1437                 list_add(&component->codec->card_list, &card->codec_dev_list);
1438 
1439         return 0;
1440 
1441 err_probe:
1442         soc_cleanup_component_debugfs(component);
1443         component->card = NULL;
1444         module_put(component->dev->driver->owner);
1445 
1446         return ret;
1447 }
1448 
1449 static void rtd_release(struct device *dev)
1450 {
1451         kfree(dev);
1452 }
1453 
1454 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1455         const char *name)
1456 {
1457         int ret = 0;
1458 
1459         /* register the rtd device */
1460         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1461         if (!rtd->dev)
1462                 return -ENOMEM;
1463         device_initialize(rtd->dev);
1464         rtd->dev->parent = rtd->card->dev;
1465         rtd->dev->release = rtd_release;
1466         rtd->dev->groups = soc_dev_attr_groups;
1467         dev_set_name(rtd->dev, "%s", name);
1468         dev_set_drvdata(rtd->dev, rtd);
1469         mutex_init(&rtd->pcm_mutex);
1470         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1471         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1472         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1473         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1474         ret = device_add(rtd->dev);
1475         if (ret < 0) {
1476                 /* calling put_device() here to free the rtd->dev */
1477                 put_device(rtd->dev);
1478                 dev_err(rtd->card->dev,
1479                         "ASoC: failed to register runtime device: %d\n", ret);
1480                 return ret;
1481         }
1482         rtd->dev_registered = 1;
1483         return 0;
1484 }
1485 
1486 static int soc_probe_link_components(struct snd_soc_card *card,
1487                         struct snd_soc_pcm_runtime *rtd,
1488                                      int order)
1489 {
1490         struct snd_soc_platform *platform = rtd->platform;
1491         struct snd_soc_component *component;
1492         int i, ret;
1493 
1494         /* probe the CPU-side component, if it is a CODEC */
1495         component = rtd->cpu_dai->component;
1496         if (component->driver->probe_order == order) {
1497                 ret = soc_probe_component(card, component);
1498                 if (ret < 0)
1499                         return ret;
1500         }
1501 
1502         /* probe the CODEC-side components */
1503         for (i = 0; i < rtd->num_codecs; i++) {
1504                 component = rtd->codec_dais[i]->component;
1505                 if (component->driver->probe_order == order) {
1506                         ret = soc_probe_component(card, component);
1507                         if (ret < 0)
1508                                 return ret;
1509                 }
1510         }
1511 
1512         /* probe the platform */
1513         if (platform->component.driver->probe_order == order) {
1514                 ret = soc_probe_component(card, &platform->component);
1515                 if (ret < 0)
1516                         return ret;
1517         }
1518 
1519         return 0;
1520 }
1521 
1522 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1523 {
1524         int ret;
1525 
1526         if (!dai->probed && dai->driver->probe_order == order) {
1527                 if (dai->driver->probe) {
1528                         ret = dai->driver->probe(dai);
1529                         if (ret < 0) {
1530                                 dev_err(dai->dev,
1531                                         "ASoC: failed to probe DAI %s: %d\n",
1532                                         dai->name, ret);
1533                                 return ret;
1534                         }
1535                 }
1536 
1537                 dai->probed = 1;
1538         }
1539 
1540         return 0;
1541 }
1542 
1543 static int soc_link_dai_widgets(struct snd_soc_card *card,
1544                                 struct snd_soc_dai_link *dai_link,
1545                                 struct snd_soc_pcm_runtime *rtd)
1546 {
1547         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1548         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1549         struct snd_soc_dapm_widget *sink, *source;
1550         int ret;
1551 
1552         if (rtd->num_codecs > 1)
1553                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1554 
1555         /* link the DAI widgets */
1556         sink = codec_dai->playback_widget;
1557         source = cpu_dai->capture_widget;
1558         if (sink && source) {
1559                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1560                                            dai_link->num_params,
1561                                            source, sink);
1562                 if (ret != 0) {
1563                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1564                                 sink->name, source->name, ret);
1565                         return ret;
1566                 }
1567         }
1568 
1569         sink = cpu_dai->playback_widget;
1570         source = codec_dai->capture_widget;
1571         if (sink && source) {
1572                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1573                                            dai_link->num_params,
1574                                            source, sink);
1575                 if (ret != 0) {
1576                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1577                                 sink->name, source->name, ret);
1578                         return ret;
1579                 }
1580         }
1581 
1582         return 0;
1583 }
1584 
1585 static int soc_probe_link_dais(struct snd_soc_card *card,
1586                 struct snd_soc_pcm_runtime *rtd, int order)
1587 {
1588         struct snd_soc_dai_link *dai_link = rtd->dai_link;
1589         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1590         int i, ret;
1591 
1592         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1593                         card->name, rtd->num, order);
1594 
1595         /* set default power off timeout */
1596         rtd->pmdown_time = pmdown_time;
1597 
1598         ret = soc_probe_dai(cpu_dai, order);
1599         if (ret)
1600                 return ret;
1601 
1602         /* probe the CODEC DAI */
1603         for (i = 0; i < rtd->num_codecs; i++) {
1604                 ret = soc_probe_dai(rtd->codec_dais[i], order);
1605                 if (ret)
1606                         return ret;
1607         }
1608 
1609         /* complete DAI probe during last probe */
1610         if (order != SND_SOC_COMP_ORDER_LAST)
1611                 return 0;
1612 
1613         /* do machine specific initialization */
1614         if (dai_link->init) {
1615                 ret = dai_link->init(rtd);
1616                 if (ret < 0) {
1617                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1618                                 dai_link->name, ret);
1619                         return ret;
1620                 }
1621         }
1622 
1623         if (dai_link->dai_fmt)
1624                 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1625 
1626         ret = soc_post_component_init(rtd, dai_link->name);
1627         if (ret)
1628                 return ret;
1629 
1630 #ifdef CONFIG_DEBUG_FS
1631         /* add DPCM sysfs entries */
1632         if (dai_link->dynamic)
1633                 soc_dpcm_debugfs_add(rtd);
1634 #endif
1635 
1636         if (cpu_dai->driver->compress_new) {
1637                 /*create compress_device"*/
1638                 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1639                 if (ret < 0) {
1640                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1641                                          dai_link->stream_name);
1642                         return ret;
1643                 }
1644         } else {
1645 
1646                 if (!dai_link->params) {
1647                         /* create the pcm */
1648                         ret = soc_new_pcm(rtd, rtd->num);
1649                         if (ret < 0) {
1650                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1651                                        dai_link->stream_name, ret);
1652                                 return ret;
1653                         }
1654                 } else {
1655                         INIT_DELAYED_WORK(&rtd->delayed_work,
1656                                                 codec2codec_close_delayed_work);
1657 
1658                         /* link the DAI widgets */
1659                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1660                         if (ret)
1661                                 return ret;
1662                 }
1663         }
1664 
1665         return 0;
1666 }
1667 
1668 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1669 {
1670         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1671         struct snd_soc_component *component;
1672         const char *name;
1673         struct device_node *codec_of_node;
1674 
1675         if (aux_dev->codec_of_node || aux_dev->codec_name) {
1676                 /* codecs, usually analog devices */
1677                 name = aux_dev->codec_name;
1678                 codec_of_node = aux_dev->codec_of_node;
1679                 component = soc_find_component(codec_of_node, name);
1680                 if (!component) {
1681                         if (codec_of_node)
1682                                 name = of_node_full_name(codec_of_node);
1683                         goto err_defer;
1684                 }
1685         } else if (aux_dev->name) {
1686                 /* generic components */
1687                 name = aux_dev->name;
1688                 component = soc_find_component(NULL, name);
1689                 if (!component)
1690                         goto err_defer;
1691         } else {
1692                 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1693                 return -EINVAL;
1694         }
1695 
1696         component->init = aux_dev->init;
1697         list_add(&component->list_aux, &card->aux_comp_list);
1698         return 0;
1699 
1700 err_defer:
1701         dev_err(card->dev, "ASoC: %s not registered\n", name);
1702         return -EPROBE_DEFER;
1703 }
1704 
1705 static int soc_probe_aux_devices(struct snd_soc_card *card)
1706 {
1707         struct snd_soc_component *comp;
1708         int order;
1709         int ret;
1710 
1711         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1712                 order++) {
1713                 list_for_each_entry(comp, &card->aux_comp_list, list_aux) {
1714                         if (comp->driver->probe_order == order) {
1715                                 ret = soc_probe_component(card, comp);
1716                                 if (ret < 0) {
1717                                         dev_err(card->dev,
1718                                                 "ASoC: failed to probe aux component %s %d\n",
1719                                                 comp->name, ret);
1720                                         return ret;
1721                                 }
1722                         }
1723                 }
1724         }
1725 
1726         return 0;
1727 }
1728 
1729 static void soc_remove_aux_devices(struct snd_soc_card *card)
1730 {
1731         struct snd_soc_component *comp, *_comp;
1732         int order;
1733 
1734         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1735                 order++) {
1736                 list_for_each_entry_safe(comp, _comp,
1737                         &card->aux_comp_list, list_aux) {
1738                         if (comp->driver->remove_order == order) {
1739                                 soc_remove_component(comp);
1740                                 /* remove it from the card's aux_comp_list */
1741                                 list_del(&comp->list_aux);
1742                         }
1743                 }
1744         }
1745 }
1746 
1747 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1748 {
1749         int ret;
1750 
1751         if (codec->cache_init)
1752                 return 0;
1753 
1754         ret = snd_soc_cache_init(codec);
1755         if (ret < 0) {
1756                 dev_err(codec->dev,
1757                         "ASoC: Failed to set cache compression type: %d\n",
1758                         ret);
1759                 return ret;
1760         }
1761         codec->cache_init = 1;
1762         return 0;
1763 }
1764 
1765 /**
1766  * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1767  * @rtd: The runtime for which the DAI link format should be changed
1768  * @dai_fmt: The new DAI link format
1769  *
1770  * This function updates the DAI link format for all DAIs connected to the DAI
1771  * link for the specified runtime.
1772  *
1773  * Note: For setups with a static format set the dai_fmt field in the
1774  * corresponding snd_dai_link struct instead of using this function.
1775  *
1776  * Returns 0 on success, otherwise a negative error code.
1777  */
1778 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1779         unsigned int dai_fmt)
1780 {
1781         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1782         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1783         unsigned int i;
1784         int ret;
1785 
1786         for (i = 0; i < rtd->num_codecs; i++) {
1787                 struct snd_soc_dai *codec_dai = codec_dais[i];
1788 
1789                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1790                 if (ret != 0 && ret != -ENOTSUPP) {
1791                         dev_warn(codec_dai->dev,
1792                                  "ASoC: Failed to set DAI format: %d\n", ret);
1793                         return ret;
1794                 }
1795         }
1796 
1797         /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1798         if (cpu_dai->codec) {
1799                 unsigned int inv_dai_fmt;
1800 
1801                 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1802                 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1803                 case SND_SOC_DAIFMT_CBM_CFM:
1804                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1805                         break;
1806                 case SND_SOC_DAIFMT_CBM_CFS:
1807                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1808                         break;
1809                 case SND_SOC_DAIFMT_CBS_CFM:
1810                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1811                         break;
1812                 case SND_SOC_DAIFMT_CBS_CFS:
1813                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1814                         break;
1815                 }
1816 
1817                 dai_fmt = inv_dai_fmt;
1818         }
1819 
1820         ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1821         if (ret != 0 && ret != -ENOTSUPP) {
1822                 dev_warn(cpu_dai->dev,
1823                          "ASoC: Failed to set DAI format: %d\n", ret);
1824                 return ret;
1825         }
1826 
1827         return 0;
1828 }
1829 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1830 
1831 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1832 {
1833         struct snd_soc_codec *codec;
1834         struct snd_soc_pcm_runtime *rtd;
1835         struct snd_soc_dai_link *dai_link;
1836         int ret, i, order;
1837 
1838         mutex_lock(&client_mutex);
1839         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1840 
1841         /* bind DAIs */
1842         for (i = 0; i < card->num_links; i++) {
1843                 ret = soc_bind_dai_link(card, &card->dai_link[i]);
1844                 if (ret != 0)
1845                         goto base_error;
1846         }
1847 
1848         /* bind aux_devs too */
1849         for (i = 0; i < card->num_aux_devs; i++) {
1850                 ret = soc_bind_aux_dev(card, i);
1851                 if (ret != 0)
1852                         goto base_error;
1853         }
1854 
1855         /* add predefined DAI links to the list */
1856         for (i = 0; i < card->num_links; i++)
1857                 snd_soc_add_dai_link(card, card->dai_link+i);
1858 
1859         /* initialize the register cache for each available codec */
1860         list_for_each_entry(codec, &codec_list, list) {
1861                 if (codec->cache_init)
1862                         continue;
1863                 ret = snd_soc_init_codec_cache(codec);
1864                 if (ret < 0)
1865                         goto base_error;
1866         }
1867 
1868         /* card bind complete so register a sound card */
1869         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1870                         card->owner, 0, &card->snd_card);
1871         if (ret < 0) {
1872                 dev_err(card->dev,
1873                         "ASoC: can't create sound card for card %s: %d\n",
1874                         card->name, ret);
1875                 goto base_error;
1876         }
1877 
1878         soc_init_card_debugfs(card);
1879 
1880         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1881         card->dapm.dev = card->dev;
1882         card->dapm.card = card;
1883         list_add(&card->dapm.list, &card->dapm_list);
1884 
1885 #ifdef CONFIG_DEBUG_FS
1886         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1887 #endif
1888 
1889 #ifdef CONFIG_PM_SLEEP
1890         /* deferred resume work */
1891         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1892 #endif
1893 
1894         if (card->dapm_widgets)
1895                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1896                                           card->num_dapm_widgets);
1897 
1898         if (card->of_dapm_widgets)
1899                 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1900                                           card->num_of_dapm_widgets);
1901 
1902         /* initialise the sound card only once */
1903         if (card->probe) {
1904                 ret = card->probe(card);
1905                 if (ret < 0)
1906                         goto card_probe_error;
1907         }
1908 
1909         /* probe all components used by DAI links on this card */
1910         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1911                         order++) {
1912                 list_for_each_entry(rtd, &card->rtd_list, list) {
1913                         ret = soc_probe_link_components(card, rtd, order);
1914                         if (ret < 0) {
1915                                 dev_err(card->dev,
1916                                         "ASoC: failed to instantiate card %d\n",
1917                                         ret);
1918                                 goto probe_dai_err;
1919                         }
1920                 }
1921         }
1922 
1923         /* probe auxiliary components */
1924         ret = soc_probe_aux_devices(card);
1925         if (ret < 0)
1926                 goto probe_dai_err;
1927 
1928         /* Find new DAI links added during probing components and bind them.
1929          * Components with topology may bring new DAIs and DAI links.
1930          */
1931         list_for_each_entry(dai_link, &card->dai_link_list, list) {
1932                 if (soc_is_dai_link_bound(card, dai_link))
1933                         continue;
1934 
1935                 ret = soc_init_dai_link(card, dai_link);
1936                 if (ret)
1937                         goto probe_dai_err;
1938                 ret = soc_bind_dai_link(card, dai_link);
1939                 if (ret)
1940                         goto probe_dai_err;
1941         }
1942 
1943         /* probe all DAI links on this card */
1944         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1945                         order++) {
1946                 list_for_each_entry(rtd, &card->rtd_list, list) {
1947                         ret = soc_probe_link_dais(card, rtd, order);
1948                         if (ret < 0) {
1949                                 dev_err(card->dev,
1950                                         "ASoC: failed to instantiate card %d\n",
1951                                         ret);
1952                                 goto probe_dai_err;
1953                         }
1954                 }
1955         }
1956 
1957         snd_soc_dapm_link_dai_widgets(card);
1958         snd_soc_dapm_connect_dai_link_widgets(card);
1959 
1960         if (card->controls)
1961                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1962 
1963         if (card->dapm_routes)
1964                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1965                                         card->num_dapm_routes);
1966 
1967         if (card->of_dapm_routes)
1968                 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1969                                         card->num_of_dapm_routes);
1970 
1971         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1972                  "%s", card->name);
1973         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1974                  "%s", card->long_name ? card->long_name : card->name);
1975         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1976                  "%s", card->driver_name ? card->driver_name : card->name);
1977         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1978                 switch (card->snd_card->driver[i]) {
1979                 case '_':
1980                 case '-':
1981                 case '\0':
1982                         break;
1983                 default:
1984                         if (!isalnum(card->snd_card->driver[i]))
1985                                 card->snd_card->driver[i] = '_';
1986                         break;
1987                 }
1988         }
1989 
1990         if (card->late_probe) {
1991                 ret = card->late_probe(card);
1992                 if (ret < 0) {
1993                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1994                                 card->name, ret);
1995                         goto probe_aux_dev_err;
1996                 }
1997         }
1998 
1999         snd_soc_dapm_new_widgets(card);
2000 
2001         ret = snd_card_register(card->snd_card);
2002         if (ret < 0) {
2003                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2004                                 ret);
2005                 goto probe_aux_dev_err;
2006         }
2007 
2008         card->instantiated = 1;
2009         snd_soc_dapm_sync(&card->dapm);
2010         mutex_unlock(&card->mutex);
2011         mutex_unlock(&client_mutex);
2012 
2013         return 0;
2014 
2015 probe_aux_dev_err:
2016         soc_remove_aux_devices(card);
2017 
2018 probe_dai_err:
2019         soc_remove_dai_links(card);
2020 
2021 card_probe_error:
2022         if (card->remove)
2023                 card->remove(card);
2024 
2025         snd_soc_dapm_free(&card->dapm);
2026         soc_cleanup_card_debugfs(card);
2027         snd_card_free(card->snd_card);
2028 
2029 base_error:
2030         soc_remove_pcm_runtimes(card);
2031         mutex_unlock(&card->mutex);
2032         mutex_unlock(&client_mutex);
2033 
2034         return ret;
2035 }
2036 
2037 /* probes a new socdev */
2038 static int soc_probe(struct platform_device *pdev)
2039 {
2040         struct snd_soc_card *card = platform_get_drvdata(pdev);
2041 
2042         /*
2043          * no card, so machine driver should be registering card
2044          * we should not be here in that case so ret error
2045          */
2046         if (!card)
2047                 return -EINVAL;
2048 
2049         dev_warn(&pdev->dev,
2050                  "ASoC: machine %s should use snd_soc_register_card()\n",
2051                  card->name);
2052 
2053         /* Bodge while we unpick instantiation */
2054         card->dev = &pdev->dev;
2055 
2056         return snd_soc_register_card(card);
2057 }
2058 
2059 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2060 {
2061         struct snd_soc_pcm_runtime *rtd;
2062 
2063         /* make sure any delayed work runs */
2064         list_for_each_entry(rtd, &card->rtd_list, list)
2065                 flush_delayed_work(&rtd->delayed_work);
2066 
2067         /* remove and free each DAI */
2068         soc_remove_dai_links(card);
2069         soc_remove_pcm_runtimes(card);
2070 
2071         /* remove auxiliary devices */
2072         soc_remove_aux_devices(card);
2073 
2074         soc_cleanup_card_debugfs(card);
2075 
2076         /* remove the card */
2077         if (card->remove)
2078                 card->remove(card);
2079 
2080         snd_soc_dapm_free(&card->dapm);
2081 
2082         snd_card_free(card->snd_card);
2083         return 0;
2084 
2085 }
2086 
2087 /* removes a socdev */
2088 static int soc_remove(struct platform_device *pdev)
2089 {
2090         struct snd_soc_card *card = platform_get_drvdata(pdev);
2091 
2092         snd_soc_unregister_card(card);
2093         return 0;
2094 }
2095 
2096 int snd_soc_poweroff(struct device *dev)
2097 {
2098         struct snd_soc_card *card = dev_get_drvdata(dev);
2099         struct snd_soc_pcm_runtime *rtd;
2100 
2101         if (!card->instantiated)
2102                 return 0;
2103 
2104         /* Flush out pmdown_time work - we actually do want to run it
2105          * now, we're shutting down so no imminent restart. */
2106         list_for_each_entry(rtd, &card->rtd_list, list)
2107                 flush_delayed_work(&rtd->delayed_work);
2108 
2109         snd_soc_dapm_shutdown(card);
2110 
2111         /* deactivate pins to sleep state */
2112         list_for_each_entry(rtd, &card->rtd_list, list) {
2113                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2114                 int i;
2115 
2116                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2117                 for (i = 0; i < rtd->num_codecs; i++) {
2118                         struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2119                         pinctrl_pm_select_sleep_state(codec_dai->dev);
2120                 }
2121         }
2122 
2123         return 0;
2124 }
2125 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2126 
2127 const struct dev_pm_ops snd_soc_pm_ops = {
2128         .suspend = snd_soc_suspend,
2129         .resume = snd_soc_resume,
2130         .freeze = snd_soc_suspend,
2131         .thaw = snd_soc_resume,
2132         .poweroff = snd_soc_poweroff,
2133         .restore = snd_soc_resume,
2134 };
2135 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2136 
2137 /* ASoC platform driver */
2138 static struct platform_driver soc_driver = {
2139         .driver         = {
2140                 .name           = "soc-audio",
2141                 .pm             = &snd_soc_pm_ops,
2142         },
2143         .probe          = soc_probe,
2144         .remove         = soc_remove,
2145 };
2146 
2147 /**
2148  * snd_soc_cnew - create new control
2149  * @_template: control template
2150  * @data: control private data
2151  * @long_name: control long name
2152  * @prefix: control name prefix
2153  *
2154  * Create a new mixer control from a template control.
2155  *
2156  * Returns 0 for success, else error.
2157  */
2158 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2159                                   void *data, const char *long_name,
2160                                   const char *prefix)
2161 {
2162         struct snd_kcontrol_new template;
2163         struct snd_kcontrol *kcontrol;
2164         char *name = NULL;
2165 
2166         memcpy(&template, _template, sizeof(template));
2167         template.index = 0;
2168 
2169         if (!long_name)
2170                 long_name = template.name;
2171 
2172         if (prefix) {
2173                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2174                 if (!name)
2175                         return NULL;
2176 
2177                 template.name = name;
2178         } else {
2179                 template.name = long_name;
2180         }
2181 
2182         kcontrol = snd_ctl_new1(&template, data);
2183 
2184         kfree(name);
2185 
2186         return kcontrol;
2187 }
2188 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2189 
2190 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2191         const struct snd_kcontrol_new *controls, int num_controls,
2192         const char *prefix, void *data)
2193 {
2194         int err, i;
2195 
2196         for (i = 0; i < num_controls; i++) {
2197                 const struct snd_kcontrol_new *control = &controls[i];
2198                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2199                                                      control->name, prefix));
2200                 if (err < 0) {
2201                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
2202                                 control->name, err);
2203                         return err;
2204                 }
2205         }
2206 
2207         return 0;
2208 }
2209 
2210 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2211                                                const char *name)
2212 {
2213         struct snd_card *card = soc_card->snd_card;
2214         struct snd_kcontrol *kctl;
2215 
2216         if (unlikely(!name))
2217                 return NULL;
2218 
2219         list_for_each_entry(kctl, &card->controls, list)
2220                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2221                         return kctl;
2222         return NULL;
2223 }
2224 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2225 
2226 /**
2227  * snd_soc_add_component_controls - Add an array of controls to a component.
2228  *
2229  * @component: Component to add controls to
2230  * @controls: Array of controls to add
2231  * @num_controls: Number of elements in the array
2232  *
2233  * Return: 0 for success, else error.
2234  */
2235 int snd_soc_add_component_controls(struct snd_soc_component *component,
2236         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2237 {
2238         struct snd_card *card = component->card->snd_card;
2239 
2240         return snd_soc_add_controls(card, component->dev, controls,
2241                         num_controls, component->name_prefix, component);
2242 }
2243 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2244 
2245 /**
2246  * snd_soc_add_codec_controls - add an array of controls to a codec.
2247  * Convenience function to add a list of controls. Many codecs were
2248  * duplicating this code.
2249  *
2250  * @codec: codec to add controls to
2251  * @controls: array of controls to add
2252  * @num_controls: number of elements in the array
2253  *
2254  * Return 0 for success, else error.
2255  */
2256 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2257         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2258 {
2259         return snd_soc_add_component_controls(&codec->component, controls,
2260                 num_controls);
2261 }
2262 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2263 
2264 /**
2265  * snd_soc_add_platform_controls - add an array of controls to a platform.
2266  * Convenience function to add a list of controls.
2267  *
2268  * @platform: platform to add controls to
2269  * @controls: array of controls to add
2270  * @num_controls: number of elements in the array
2271  *
2272  * Return 0 for success, else error.
2273  */
2274 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2275         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2276 {
2277         return snd_soc_add_component_controls(&platform->component, controls,
2278                 num_controls);
2279 }
2280 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2281 
2282 /**
2283  * snd_soc_add_card_controls - add an array of controls to a SoC card.
2284  * Convenience function to add a list of controls.
2285  *
2286  * @soc_card: SoC card to add controls to
2287  * @controls: array of controls to add
2288  * @num_controls: number of elements in the array
2289  *
2290  * Return 0 for success, else error.
2291  */
2292 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2293         const struct snd_kcontrol_new *controls, int num_controls)
2294 {
2295         struct snd_card *card = soc_card->snd_card;
2296 
2297         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2298                         NULL, soc_card);
2299 }
2300 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2301 
2302 /**
2303  * snd_soc_add_dai_controls - add an array of controls to a DAI.
2304  * Convienience function to add a list of controls.
2305  *
2306  * @dai: DAI to add controls to
2307  * @controls: array of controls to add
2308  * @num_controls: number of elements in the array
2309  *
2310  * Return 0 for success, else error.
2311  */
2312 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2313         const struct snd_kcontrol_new *controls, int num_controls)
2314 {
2315         struct snd_card *card = dai->component->card->snd_card;
2316 
2317         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2318                         NULL, dai);
2319 }
2320 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2321 
2322 /**
2323  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2324  * @dai: DAI
2325  * @clk_id: DAI specific clock ID
2326  * @freq: new clock frequency in Hz
2327  * @dir: new clock direction - input/output.
2328  *
2329  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2330  */
2331 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2332         unsigned int freq, int dir)
2333 {
2334         if (dai->driver && dai->driver->ops->set_sysclk)
2335                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2336         else if (dai->codec && dai->codec->driver->set_sysclk)
2337                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2338                                                       freq, dir);
2339         else
2340                 return -ENOTSUPP;
2341 }
2342 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2343 
2344 /**
2345  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2346  * @codec: CODEC
2347  * @clk_id: DAI specific clock ID
2348  * @source: Source for the clock
2349  * @freq: new clock frequency in Hz
2350  * @dir: new clock direction - input/output.
2351  *
2352  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2353  */
2354 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2355                              int source, unsigned int freq, int dir)
2356 {
2357         if (codec->driver->set_sysclk)
2358                 return codec->driver->set_sysclk(codec, clk_id, source,
2359                                                  freq, dir);
2360         else
2361                 return -ENOTSUPP;
2362 }
2363 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2364 
2365 /**
2366  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2367  * @dai: DAI
2368  * @div_id: DAI specific clock divider ID
2369  * @div: new clock divisor.
2370  *
2371  * Configures the clock dividers. This is used to derive the best DAI bit and
2372  * frame clocks from the system or master clock. It's best to set the DAI bit
2373  * and frame clocks as low as possible to save system power.
2374  */
2375 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2376         int div_id, int div)
2377 {
2378         if (dai->driver && dai->driver->ops->set_clkdiv)
2379                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2380         else
2381                 return -EINVAL;
2382 }
2383 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2384 
2385 /**
2386  * snd_soc_dai_set_pll - configure DAI PLL.
2387  * @dai: DAI
2388  * @pll_id: DAI specific PLL ID
2389  * @source: DAI specific source for the PLL
2390  * @freq_in: PLL input clock frequency in Hz
2391  * @freq_out: requested PLL output clock frequency in Hz
2392  *
2393  * Configures and enables PLL to generate output clock based on input clock.
2394  */
2395 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2396         unsigned int freq_in, unsigned int freq_out)
2397 {
2398         if (dai->driver && dai->driver->ops->set_pll)
2399                 return dai->driver->ops->set_pll(dai, pll_id, source,
2400                                          freq_in, freq_out);
2401         else if (dai->codec && dai->codec->driver->set_pll)
2402                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2403                                                    freq_in, freq_out);
2404         else
2405                 return -EINVAL;
2406 }
2407 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2408 
2409 /*
2410  * snd_soc_codec_set_pll - configure codec PLL.
2411  * @codec: CODEC
2412  * @pll_id: DAI specific PLL ID
2413  * @source: DAI specific source for the PLL
2414  * @freq_in: PLL input clock frequency in Hz
2415  * @freq_out: requested PLL output clock frequency in Hz
2416  *
2417  * Configures and enables PLL to generate output clock based on input clock.
2418  */
2419 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2420                           unsigned int freq_in, unsigned int freq_out)
2421 {
2422         if (codec->driver->set_pll)
2423                 return codec->driver->set_pll(codec, pll_id, source,
2424                                               freq_in, freq_out);
2425         else
2426                 return -EINVAL;
2427 }
2428 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2429 
2430 /**
2431  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2432  * @dai: DAI
2433  * @ratio: Ratio of BCLK to Sample rate.
2434  *
2435  * Configures the DAI for a preset BCLK to sample rate ratio.
2436  */
2437 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2438 {
2439         if (dai->driver && dai->driver->ops->set_bclk_ratio)
2440                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2441         else
2442                 return -EINVAL;
2443 }
2444 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2445 
2446 /**
2447  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2448  * @dai: DAI
2449  * @fmt: SND_SOC_DAIFMT_ format value.
2450  *
2451  * Configures the DAI hardware format and clocking.
2452  */
2453 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2454 {
2455         if (dai->driver == NULL)
2456                 return -EINVAL;
2457         if (dai->driver->ops->set_fmt == NULL)
2458                 return -ENOTSUPP;
2459         return dai->driver->ops->set_fmt(dai, fmt);
2460 }
2461 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2462 
2463 /**
2464  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2465  * @slots: Number of slots in use.
2466  * @tx_mask: bitmask representing active TX slots.
2467  * @rx_mask: bitmask representing active RX slots.
2468  *
2469  * Generates the TDM tx and rx slot default masks for DAI.
2470  */
2471 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2472                                           unsigned int *tx_mask,
2473                                           unsigned int *rx_mask)
2474 {
2475         if (*tx_mask || *rx_mask)
2476                 return 0;
2477 
2478         if (!slots)
2479                 return -EINVAL;
2480 
2481         *tx_mask = (1 << slots) - 1;
2482         *rx_mask = (1 << slots) - 1;
2483 
2484         return 0;
2485 }
2486 
2487 /**
2488  * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2489  * @dai: The DAI to configure
2490  * @tx_mask: bitmask representing active TX slots.
2491  * @rx_mask: bitmask representing active RX slots.
2492  * @slots: Number of slots in use.
2493  * @slot_width: Width in bits for each slot.
2494  *
2495  * This function configures the specified DAI for TDM operation. @slot contains
2496  * the total number of slots of the TDM stream and @slot_with the width of each
2497  * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2498  * active slots of the TDM stream for the specified DAI, i.e. which slots the
2499  * DAI should write to or read from. If a bit is set the corresponding slot is
2500  * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2501  * the first slot, bit 1 to the second slot and so on. The first active slot
2502  * maps to the first channel of the DAI, the second active slot to the second
2503  * channel and so on.
2504  *
2505  * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2506  * @rx_mask and @slot_width will be ignored.
2507  *
2508  * Returns 0 on success, a negative error code otherwise.
2509  */
2510 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2511         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2512 {
2513         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2514                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2515                                                 &tx_mask, &rx_mask);
2516         else
2517                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2518 
2519         dai->tx_mask = tx_mask;
2520         dai->rx_mask = rx_mask;
2521 
2522         if (dai->driver && dai->driver->ops->set_tdm_slot)
2523                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2524                                 slots, slot_width);
2525         else
2526                 return -ENOTSUPP;
2527 }
2528 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2529 
2530 /**
2531  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2532  * @dai: DAI
2533  * @tx_num: how many TX channels
2534  * @tx_slot: pointer to an array which imply the TX slot number channel
2535  *           0~num-1 uses
2536  * @rx_num: how many RX channels
2537  * @rx_slot: pointer to an array which imply the RX slot number channel
2538  *           0~num-1 uses
2539  *
2540  * configure the relationship between channel number and TDM slot number.
2541  */
2542 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2543         unsigned int tx_num, unsigned int *tx_slot,
2544         unsigned int rx_num, unsigned int *rx_slot)
2545 {
2546         if (dai->driver && dai->driver->ops->set_channel_map)
2547                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2548                         rx_num, rx_slot);
2549         else
2550                 return -EINVAL;
2551 }
2552 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2553 
2554 /**
2555  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2556  * @dai: DAI
2557  * @tristate: tristate enable
2558  *
2559  * Tristates the DAI so that others can use it.
2560  */
2561 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2562 {
2563         if (dai->driver && dai->driver->ops->set_tristate)
2564                 return dai->driver->ops->set_tristate(dai, tristate);
2565         else
2566                 return -EINVAL;
2567 }
2568 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2569 
2570 /**
2571  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2572  * @dai: DAI
2573  * @mute: mute enable
2574  * @direction: stream to mute
2575  *
2576  * Mutes the DAI DAC.
2577  */
2578 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2579                              int direction)
2580 {
2581         if (!dai->driver)
2582                 return -ENOTSUPP;
2583 
2584         if (dai->driver->ops->mute_stream)
2585                 return dai->driver->ops->mute_stream(dai, mute, direction);
2586         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2587                  dai->driver->ops->digital_mute)
2588                 return dai->driver->ops->digital_mute(dai, mute);
2589         else
2590                 return -ENOTSUPP;
2591 }
2592 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2593 
2594 /**
2595  * snd_soc_register_card - Register a card with the ASoC core
2596  *
2597  * @card: Card to register
2598  *
2599  */
2600 int snd_soc_register_card(struct snd_soc_card *card)
2601 {
2602         int i, ret;
2603         struct snd_soc_pcm_runtime *rtd;
2604 
2605         if (!card->name || !card->dev)
2606                 return -EINVAL;
2607 
2608         for (i = 0; i < card->num_links; i++) {
2609                 struct snd_soc_dai_link *link = &card->dai_link[i];
2610 
2611                 ret = soc_init_dai_link(card, link);
2612                 if (ret) {
2613                         dev_err(card->dev, "ASoC: failed to init link %s\n",
2614                                 link->name);
2615                         return ret;
2616                 }
2617         }
2618 
2619         dev_set_drvdata(card->dev, card);
2620 
2621         snd_soc_initialize_card_lists(card);
2622 
2623         INIT_LIST_HEAD(&card->dai_link_list);
2624         card->num_dai_links = 0;
2625 
2626         INIT_LIST_HEAD(&card->rtd_list);
2627         card->num_rtd = 0;
2628 
2629         INIT_LIST_HEAD(&card->dapm_dirty);
2630         INIT_LIST_HEAD(&card->dobj_list);
2631         card->instantiated = 0;
2632         mutex_init(&card->mutex);
2633         mutex_init(&card->dapm_mutex);
2634 
2635         ret = snd_soc_instantiate_card(card);
2636         if (ret != 0)
2637                 return ret;
2638 
2639         /* deactivate pins to sleep state */
2640         list_for_each_entry(rtd, &card->rtd_list, list)  {
2641                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2642                 int j;
2643 
2644                 for (j = 0; j < rtd->num_codecs; j++) {
2645                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2646                         if (!codec_dai->active)
2647                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
2648                 }
2649 
2650                 if (!cpu_dai->active)
2651                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
2652         }
2653 
2654         return ret;
2655 }
2656 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2657 
2658 /**
2659  * snd_soc_unregister_card - Unregister a card with the ASoC core
2660  *
2661  * @card: Card to unregister
2662  *
2663  */
2664 int snd_soc_unregister_card(struct snd_soc_card *card)
2665 {
2666         if (card->instantiated) {
2667                 card->instantiated = false;
2668                 snd_soc_dapm_shutdown(card);
2669                 soc_cleanup_card_resources(card);
2670                 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2671         }
2672 
2673         return 0;
2674 }
2675 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2676 
2677 /*
2678  * Simplify DAI link configuration by removing ".-1" from device names
2679  * and sanitizing names.
2680  */
2681 static char *fmt_single_name(struct device *dev, int *id)
2682 {
2683         char *found, name[NAME_SIZE];
2684         int id1, id2;
2685 
2686         if (dev_name(dev) == NULL)
2687                 return NULL;
2688 
2689         strlcpy(name, dev_name(dev), NAME_SIZE);
2690 
2691         /* are we a "%s.%d" name (platform and SPI components) */
2692         found = strstr(name, dev->driver->name);
2693         if (found) {
2694                 /* get ID */
2695                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2696 
2697                         /* discard ID from name if ID == -1 */
2698                         if (*id == -1)
2699                                 found[strlen(dev->driver->name)] = '\0';
2700                 }
2701 
2702         } else {
2703                 /* I2C component devices are named "bus-addr"  */
2704                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2705                         char tmp[NAME_SIZE];
2706 
2707                         /* create unique ID number from I2C addr and bus */
2708                         *id = ((id1 & 0xffff) << 16) + id2;
2709 
2710                         /* sanitize component name for DAI link creation */
2711                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2712                         strlcpy(name, tmp, NAME_SIZE);
2713                 } else
2714                         *id = 0;
2715         }
2716 
2717         return kstrdup(name, GFP_KERNEL);
2718 }
2719 
2720 /*
2721  * Simplify DAI link naming for single devices with multiple DAIs by removing
2722  * any ".-1" and using the DAI name (instead of device name).
2723  */
2724 static inline char *fmt_multiple_name(struct device *dev,
2725                 struct snd_soc_dai_driver *dai_drv)
2726 {
2727         if (dai_drv->name == NULL) {
2728                 dev_err(dev,
2729                         "ASoC: error - multiple DAI %s registered with no name\n",
2730                         dev_name(dev));
2731                 return NULL;
2732         }
2733 
2734         return kstrdup(dai_drv->name, GFP_KERNEL);
2735 }
2736 
2737 /**
2738  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2739  *
2740  * @component: The component for which the DAIs should be unregistered
2741  */
2742 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2743 {
2744         struct snd_soc_dai *dai, *_dai;
2745 
2746         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2747                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2748                         dai->name);
2749                 list_del(&dai->list);
2750                 kfree(dai->name);
2751                 kfree(dai);
2752         }
2753 }
2754 
2755 /* Create a DAI and add it to the component's DAI list */
2756 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2757         struct snd_soc_dai_driver *dai_drv,
2758         bool legacy_dai_naming)
2759 {
2760         struct device *dev = component->dev;
2761         struct snd_soc_dai *dai;
2762 
2763         dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2764 
2765         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2766         if (dai == NULL)
2767                 return NULL;
2768 
2769         /*
2770          * Back in the old days when we still had component-less DAIs,
2771          * instead of having a static name, component-less DAIs would
2772          * inherit the name of the parent device so it is possible to
2773          * register multiple instances of the DAI. We still need to keep
2774          * the same naming style even though those DAIs are not
2775          * component-less anymore.
2776          */
2777         if (legacy_dai_naming &&
2778            (dai_drv->id == 0 || dai_drv->name == NULL)) {
2779                 dai->name = fmt_single_name(dev, &dai->id);
2780         } else {
2781                 dai->name = fmt_multiple_name(dev, dai_drv);
2782                 if (dai_drv->id)
2783                         dai->id = dai_drv->id;
2784                 else
2785                         dai->id = component->num_dai;
2786         }
2787         if (dai->name == NULL) {
2788                 kfree(dai);
2789                 return NULL;
2790         }
2791 
2792         dai->component = component;
2793         dai->dev = dev;
2794         dai->driver = dai_drv;
2795         if (!dai->driver->ops)
2796                 dai->driver->ops = &null_dai_ops;
2797 
2798         list_add(&dai->list, &component->dai_list);
2799         component->num_dai++;
2800 
2801         dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2802         return dai;
2803 }
2804 
2805 /**
2806  * snd_soc_register_dais - Register a DAI with the ASoC core
2807  *
2808  * @component: The component the DAIs are registered for
2809  * @dai_drv: DAI driver to use for the DAIs
2810  * @count: Number of DAIs
2811  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2812  *                     parent's name.
2813  */
2814 static int snd_soc_register_dais(struct snd_soc_component *component,
2815         struct snd_soc_dai_driver *dai_drv, size_t count,
2816         bool legacy_dai_naming)
2817 {
2818         struct device *dev = component->dev;
2819         struct snd_soc_dai *dai;
2820         unsigned int i;
2821         int ret;
2822 
2823         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2824 
2825         component->dai_drv = dai_drv;
2826 
2827         for (i = 0; i < count; i++) {
2828 
2829                 dai = soc_add_dai(component, dai_drv + i,
2830                                 count == 1 && legacy_dai_naming);
2831                 if (dai == NULL) {
2832                         ret = -ENOMEM;
2833                         goto err;
2834                 }
2835         }
2836 
2837         return 0;
2838 
2839 err:
2840         snd_soc_unregister_dais(component);
2841 
2842         return ret;
2843 }
2844 
2845 /**
2846  * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2847  *
2848  * @component: The component the DAIs are registered for
2849  * @dai_drv: DAI driver to use for the DAI
2850  *
2851  * Topology can use this API to register DAIs when probing a component.
2852  * These DAIs's widgets will be freed in the card cleanup and the DAIs
2853  * will be freed in the component cleanup.
2854  */
2855 int snd_soc_register_dai(struct snd_soc_component *component,
2856         struct snd_soc_dai_driver *dai_drv)
2857 {
2858         struct snd_soc_dapm_context *dapm =
2859                 snd_soc_component_get_dapm(component);
2860         struct snd_soc_dai *dai;
2861         int ret;
2862 
2863         if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2864                 dev_err(component->dev, "Invalid dai type %d\n",
2865                         dai_drv->dobj.type);
2866                 return -EINVAL;
2867         }
2868 
2869         lockdep_assert_held(&client_mutex);
2870         dai = soc_add_dai(component, dai_drv, false);
2871         if (!dai)
2872                 return -ENOMEM;
2873 
2874         /* Create the DAI widgets here. After adding DAIs, topology may
2875          * also add routes that need these widgets as source or sink.
2876          */
2877         ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2878         if (ret != 0) {
2879                 dev_err(component->dev,
2880                         "Failed to create DAI widgets %d\n", ret);
2881         }
2882 
2883         return ret;
2884 }
2885 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2886 
2887 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2888         enum snd_soc_dapm_type type, int subseq)
2889 {
2890         struct snd_soc_component *component = dapm->component;
2891 
2892         component->driver->seq_notifier(component, type, subseq);
2893 }
2894 
2895 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2896         int event)
2897 {
2898         struct snd_soc_component *component = dapm->component;
2899 
2900         return component->driver->stream_event(component, event);
2901 }
2902 
2903 static int snd_soc_component_initialize(struct snd_soc_component *component,
2904         const struct snd_soc_component_driver *driver, struct device *dev)
2905 {
2906         struct snd_soc_dapm_context *dapm;
2907 
2908         component->name = fmt_single_name(dev, &component->id);
2909         if (!component->name) {
2910                 dev_err(dev, "ASoC: Failed to allocate name\n");
2911                 return -ENOMEM;
2912         }
2913 
2914         component->dev = dev;
2915         component->driver = driver;
2916         component->probe = component->driver->probe;
2917         component->remove = component->driver->remove;
2918 
2919         dapm = &component->dapm;
2920         dapm->dev = dev;
2921         dapm->component = component;
2922         dapm->bias_level = SND_SOC_BIAS_OFF;
2923         dapm->idle_bias_off = true;
2924         if (driver->seq_notifier)
2925                 dapm->seq_notifier = snd_soc_component_seq_notifier;
2926         if (driver->stream_event)
2927                 dapm->stream_event = snd_soc_component_stream_event;
2928 
2929         component->controls = driver->controls;
2930         component->num_controls = driver->num_controls;
2931         component->dapm_widgets = driver->dapm_widgets;
2932         component->num_dapm_widgets = driver->num_dapm_widgets;
2933         component->dapm_routes = driver->dapm_routes;
2934         component->num_dapm_routes = driver->num_dapm_routes;
2935 
2936         INIT_LIST_HEAD(&component->dai_list);
2937         mutex_init(&component->io_mutex);
2938 
2939         return 0;
2940 }
2941 
2942 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2943 {
2944         int val_bytes = regmap_get_val_bytes(component->regmap);
2945 
2946         /* Errors are legitimate for non-integer byte multiples */
2947         if (val_bytes > 0)
2948                 component->val_bytes = val_bytes;
2949 }
2950 
2951 #ifdef CONFIG_REGMAP
2952 
2953 /**
2954  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2955  * @component: The component for which to initialize the regmap instance
2956  * @regmap: The regmap instance that should be used by the component
2957  *
2958  * This function allows deferred assignment of the regmap instance that is
2959  * associated with the component. Only use this if the regmap instance is not
2960  * yet ready when the component is registered. The function must also be called
2961  * before the first IO attempt of the component.
2962  */
2963 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2964         struct regmap *regmap)
2965 {
2966         component->regmap = regmap;
2967         snd_soc_component_setup_regmap(component);
2968 }
2969 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2970 
2971 /**
2972  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2973  * @component: The component for which to de-initialize the regmap instance
2974  *
2975  * Calls regmap_exit() on the regmap instance associated to the component and
2976  * removes the regmap instance from the component.
2977  *
2978  * This function should only be used if snd_soc_component_init_regmap() was used
2979  * to initialize the regmap instance.
2980  */
2981 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2982 {
2983         regmap_exit(component->regmap);
2984         component->regmap = NULL;
2985 }
2986 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2987 
2988 #endif
2989 
2990 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2991 {
2992         if (!component->write && !component->read) {
2993                 if (!component->regmap)
2994                         component->regmap = dev_get_regmap(component->dev, NULL);
2995                 if (component->regmap)
2996                         snd_soc_component_setup_regmap(component);
2997         }
2998 
2999         list_add(&component->list, &component_list);
3000         INIT_LIST_HEAD(&component->dobj_list);
3001 }
3002 
3003 static void snd_soc_component_add(struct snd_soc_component *component)
3004 {
3005         mutex_lock(&client_mutex);
3006         snd_soc_component_add_unlocked(component);
3007         mutex_unlock(&client_mutex);
3008 }
3009 
3010 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3011 {
3012         snd_soc_unregister_dais(component);
3013         kfree(component->name);
3014 }
3015 
3016 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3017 {
3018         list_del(&component->list);
3019 }
3020 
3021 int snd_soc_register_component(struct device *dev,
3022                                const struct snd_soc_component_driver *cmpnt_drv,
3023                                struct snd_soc_dai_driver *dai_drv,
3024                                int num_dai)
3025 {
3026         struct snd_soc_component *cmpnt;
3027         int ret;
3028 
3029         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
3030         if (!cmpnt) {
3031                 dev_err(dev, "ASoC: Failed to allocate memory\n");
3032                 return -ENOMEM;
3033         }
3034 
3035         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
3036         if (ret)
3037                 goto err_free;
3038 
3039         cmpnt->ignore_pmdown_time = true;
3040         cmpnt->registered_as_component = true;
3041 
3042         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
3043         if (ret < 0) {
3044                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3045                 goto err_cleanup;
3046         }
3047 
3048         snd_soc_component_add(cmpnt);
3049 
3050         return 0;
3051 
3052 err_cleanup:
3053         snd_soc_component_cleanup(cmpnt);
3054 err_free:
3055         kfree(cmpnt);
3056         return ret;
3057 }
3058 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3059 
3060 /**
3061  * snd_soc_unregister_component - Unregister a component from the ASoC core
3062  *
3063  * @dev: The device to unregister
3064  */
3065 void snd_soc_unregister_component(struct device *dev)
3066 {
3067         struct snd_soc_component *cmpnt;
3068 
3069         mutex_lock(&client_mutex);
3070         list_for_each_entry(cmpnt, &component_list, list) {
3071                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
3072                         goto found;
3073         }
3074         mutex_unlock(&client_mutex);
3075         return;
3076 
3077 found:
3078         snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
3079         snd_soc_component_del_unlocked(cmpnt);
3080         mutex_unlock(&client_mutex);
3081         snd_soc_component_cleanup(cmpnt);
3082         kfree(cmpnt);
3083 }
3084 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3085 
3086 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3087 {
3088         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3089 
3090         return platform->driver->probe(platform);
3091 }
3092 
3093 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3094 {
3095         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3096 
3097         platform->driver->remove(platform);
3098 }
3099 
3100 /**
3101  * snd_soc_add_platform - Add a platform to the ASoC core
3102  * @dev: The parent device for the platform
3103  * @platform: The platform to add
3104  * @platform_drv: The driver for the platform
3105  */
3106 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3107                 const struct snd_soc_platform_driver *platform_drv)
3108 {
3109         int ret;
3110 
3111         ret = snd_soc_component_initialize(&platform->component,
3112                         &platform_drv->component_driver, dev);
3113         if (ret)
3114                 return ret;
3115 
3116         platform->dev = dev;
3117         platform->driver = platform_drv;
3118 
3119         if (platform_drv->probe)
3120                 platform->component.probe = snd_soc_platform_drv_probe;
3121         if (platform_drv->remove)
3122                 platform->component.remove = snd_soc_platform_drv_remove;
3123 
3124 #ifdef CONFIG_DEBUG_FS
3125         platform->component.debugfs_prefix = "platform";
3126 #endif
3127 
3128         mutex_lock(&client_mutex);
3129         snd_soc_component_add_unlocked(&platform->component);
3130         list_add(&platform->list, &platform_list);
3131         mutex_unlock(&client_mutex);
3132 
3133         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3134                 platform->component.name);
3135 
3136         return 0;
3137 }
3138 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3139 
3140 /**
3141  * snd_soc_register_platform - Register a platform with the ASoC core
3142  *
3143  * @dev: The device for the platform
3144  * @platform_drv: The driver for the platform
3145  */
3146 int snd_soc_register_platform(struct device *dev,
3147                 const struct snd_soc_platform_driver *platform_drv)
3148 {
3149         struct snd_soc_platform *platform;
3150         int ret;
3151 
3152         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3153 
3154         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3155         if (platform == NULL)
3156                 return -ENOMEM;
3157 
3158         ret = snd_soc_add_platform(dev, platform, platform_drv);
3159         if (ret)
3160                 kfree(platform);
3161 
3162         return ret;
3163 }
3164 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3165 
3166 /**
3167  * snd_soc_remove_platform - Remove a platform from the ASoC core
3168  * @platform: the platform to remove
3169  */
3170 void snd_soc_remove_platform(struct snd_soc_platform *platform)
3171 {
3172 
3173         mutex_lock(&client_mutex);
3174         list_del(&platform->list);
3175         snd_soc_component_del_unlocked(&platform->component);
3176         mutex_unlock(&client_mutex);
3177 
3178         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3179                 platform->component.name);
3180 
3181         snd_soc_component_cleanup(&platform->component);
3182 }
3183 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3184 
3185 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3186 {
3187         struct snd_soc_platform *platform;
3188 
3189         mutex_lock(&client_mutex);
3190         list_for_each_entry(platform, &platform_list, list) {
3191                 if (dev == platform->dev) {
3192                         mutex_unlock(&client_mutex);
3193                         return platform;
3194                 }
3195         }
3196         mutex_unlock(&client_mutex);
3197 
3198         return NULL;
3199 }
3200 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3201 
3202 /**
3203  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3204  *
3205  * @dev: platform to unregister
3206  */
3207 void snd_soc_unregister_platform(struct device *dev)
3208 {
3209         struct snd_soc_platform *platform;
3210 
3211         platform = snd_soc_lookup_platform(dev);
3212         if (!platform)
3213                 return;
3214 
3215         snd_soc_remove_platform(platform);
3216         kfree(platform);
3217 }
3218 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3219 
3220 static u64 codec_format_map[] = {
3221         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3222         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3223         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3224         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3225         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3226         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3227         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3228         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3229         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3230         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3231         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3232         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3233         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3234         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3235         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3236         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3237 };
3238 
3239 /* Fix up the DAI formats for endianness: codecs don't actually see
3240  * the endianness of the data but we're using the CPU format
3241  * definitions which do need to include endianness so we ensure that
3242  * codec DAIs always have both big and little endian variants set.
3243  */
3244 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3245 {
3246         int i;
3247 
3248         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3249                 if (stream->formats & codec_format_map[i])
3250                         stream->formats |= codec_format_map[i];
3251 }
3252 
3253 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3254 {
3255         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3256 
3257         return codec->driver->probe(codec);
3258 }
3259 
3260 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3261 {
3262         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3263 
3264         codec->driver->remove(codec);
3265 }
3266 
3267 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3268         unsigned int reg, unsigned int val)
3269 {
3270         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3271 
3272         return codec->driver->write(codec, reg, val);
3273 }
3274 
3275 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3276         unsigned int reg, unsigned int *val)
3277 {
3278         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3279 
3280         *val = codec->driver->read(codec, reg);
3281 
3282         return 0;
3283 }
3284 
3285 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3286         enum snd_soc_bias_level level)
3287 {
3288         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3289 
3290         return codec->driver->set_bias_level(codec, level);
3291 }
3292 
3293 /**
3294  * snd_soc_register_codec - Register a codec with the ASoC core
3295  *
3296  * @dev: The parent device for this codec
3297  * @codec_drv: Codec driver
3298  * @dai_drv: The associated DAI driver
3299  * @num_dai: Number of DAIs
3300  */
3301 int snd_soc_register_codec(struct device *dev,
3302                            const struct snd_soc_codec_driver *codec_drv,
3303                            struct snd_soc_dai_driver *dai_drv,
3304                            int num_dai)
3305 {
3306         struct snd_soc_dapm_context *dapm;
3307         struct snd_soc_codec *codec;
3308         struct snd_soc_dai *dai;
3309         int ret, i;
3310 
3311         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3312 
3313         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3314         if (codec == NULL)
3315                 return -ENOMEM;
3316 
3317         codec->component.codec = codec;
3318 
3319         ret = snd_soc_component_initialize(&codec->component,
3320                         &codec_drv->component_driver, dev);
3321         if (ret)
3322                 goto err_free;
3323 
3324         if (codec_drv->controls) {
3325                 codec->component.controls = codec_drv->controls;
3326                 codec->component.num_controls = codec_drv->num_controls;
3327         }
3328         if (codec_drv->dapm_widgets) {
3329                 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3330                 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3331         }
3332         if (codec_drv->dapm_routes) {
3333                 codec->component.dapm_routes = codec_drv->dapm_routes;
3334                 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3335         }
3336 
3337         if (codec_drv->probe)
3338                 codec->component.probe = snd_soc_codec_drv_probe;
3339         if (codec_drv->remove)
3340                 codec->component.remove = snd_soc_codec_drv_remove;
3341         if (codec_drv->write)
3342                 codec->component.write = snd_soc_codec_drv_write;
3343         if (codec_drv->read)
3344                 codec->component.read = snd_soc_codec_drv_read;
3345         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3346 
3347         dapm = snd_soc_codec_get_dapm(codec);
3348         dapm->idle_bias_off = codec_drv->idle_bias_off;
3349         dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3350         if (codec_drv->seq_notifier)
3351                 dapm->seq_notifier = codec_drv->seq_notifier;
3352         if (codec_drv->set_bias_level)
3353                 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3354         codec->dev = dev;
3355         codec->driver = codec_drv;
3356         codec->component.val_bytes = codec_drv->reg_word_size;
3357 
3358 #ifdef CONFIG_DEBUG_FS
3359         codec->component.init_debugfs = soc_init_codec_debugfs;
3360         codec->component.debugfs_prefix = "codec";
3361 #endif
3362 
3363         if (codec_drv->get_regmap)
3364                 codec->component.regmap = codec_drv->get_regmap(dev);
3365 
3366         for (i = 0; i < num_dai; i++) {
3367                 fixup_codec_formats(&dai_drv[i].playback);
3368                 fixup_codec_formats(&dai_drv[i].capture);
3369         }
3370 
3371         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3372         if (ret < 0) {
3373                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3374                 goto err_cleanup;
3375         }
3376 
3377         list_for_each_entry(dai, &codec->component.dai_list, list)
3378                 dai->codec = codec;
3379 
3380         mutex_lock(&client_mutex);
3381         snd_soc_component_add_unlocked(&codec->component);
3382         list_add(&codec->list, &codec_list);
3383         mutex_unlock(&client_mutex);
3384 
3385         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3386                 codec->component.name);
3387         return 0;
3388 
3389 err_cleanup:
3390         snd_soc_component_cleanup(&codec->component);
3391 err_free:
3392         kfree(codec);
3393         return ret;
3394 }
3395 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3396 
3397 /**
3398  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3399  *
3400  * @dev: codec to unregister
3401  */
3402 void snd_soc_unregister_codec(struct device *dev)
3403 {
3404         struct snd_soc_codec *codec;
3405 
3406         mutex_lock(&client_mutex);
3407         list_for_each_entry(codec, &codec_list, list) {
3408                 if (dev == codec->dev)
3409                         goto found;
3410         }
3411         mutex_unlock(&client_mutex);
3412         return;
3413 
3414 found:
3415         list_del(&codec->list);
3416         snd_soc_component_del_unlocked(&codec->component);
3417         mutex_unlock(&client_mutex);
3418 
3419         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3420                         codec->component.name);
3421 
3422         snd_soc_component_cleanup(&codec->component);
3423         snd_soc_cache_exit(codec);
3424         kfree(codec);
3425 }
3426 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3427 
3428 /* Retrieve a card's name from device tree */
3429 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3430                                const char *propname)
3431 {
3432         struct device_node *np;
3433         int ret;
3434 
3435         if (!card->dev) {
3436                 pr_err("card->dev is not set before calling %s\n", __func__);
3437                 return -EINVAL;
3438         }
3439 
3440         np = card->dev->of_node;
3441 
3442         ret = of_property_read_string_index(np, propname, 0, &card->name);
3443         /*
3444          * EINVAL means the property does not exist. This is fine providing
3445          * card->name was previously set, which is checked later in
3446          * snd_soc_register_card.
3447          */
3448         if (ret < 0 && ret != -EINVAL) {
3449                 dev_err(card->dev,
3450                         "ASoC: Property '%s' could not be read: %d\n",
3451                         propname, ret);
3452                 return ret;
3453         }
3454 
3455         return 0;
3456 }
3457 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3458 
3459 static const struct snd_soc_dapm_widget simple_widgets[] = {
3460         SND_SOC_DAPM_MIC("Microphone", NULL),
3461         SND_SOC_DAPM_LINE("Line", NULL),
3462         SND_SOC_DAPM_HP("Headphone", NULL),
3463         SND_SOC_DAPM_SPK("Speaker", NULL),
3464 };
3465 
3466 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3467                                           const char *propname)
3468 {
3469         struct device_node *np = card->dev->of_node;
3470         struct snd_soc_dapm_widget *widgets;
3471         const char *template, *wname;
3472         int i, j, num_widgets, ret;
3473 
3474         num_widgets = of_property_count_strings(np, propname);
3475         if (num_widgets < 0) {
3476                 dev_err(card->dev,
3477                         "ASoC: Property '%s' does not exist\n", propname);
3478                 return -EINVAL;
3479         }
3480         if (num_widgets & 1) {
3481                 dev_err(card->dev,
3482                         "ASoC: Property '%s' length is not even\n", propname);
3483                 return -EINVAL;
3484         }
3485 
3486         num_widgets /= 2;
3487         if (!num_widgets) {
3488                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3489                         propname);
3490                 return -EINVAL;
3491         }
3492 
3493         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3494                                GFP_KERNEL);
3495         if (!widgets) {
3496                 dev_err(card->dev,
3497                         "ASoC: Could not allocate memory for widgets\n");
3498                 return -ENOMEM;
3499         }
3500 
3501         for (i = 0; i < num_widgets; i++) {
3502                 ret = of_property_read_string_index(np, propname,
3503                         2 * i, &template);
3504                 if (ret) {
3505                         dev_err(card->dev,
3506                                 "ASoC: Property '%s' index %d read error:%d\n",
3507                                 propname, 2 * i, ret);
3508                         return -EINVAL;
3509                 }
3510 
3511                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3512                         if (!strncmp(template, simple_widgets[j].name,
3513                                      strlen(simple_widgets[j].name))) {
3514                                 widgets[i] = simple_widgets[j];
3515                                 break;
3516                         }
3517                 }
3518 
3519                 if (j >= ARRAY_SIZE(simple_widgets)) {
3520                         dev_err(card->dev,
3521                                 "ASoC: DAPM widget '%s' is not supported\n",
3522                                 template);
3523                         return -EINVAL;
3524                 }
3525 
3526                 ret = of_property_read_string_index(np, propname,
3527                                                     (2 * i) + 1,
3528                                                     &wname);
3529                 if (ret) {
3530                         dev_err(card->dev,
3531                                 "ASoC: Property '%s' index %d read error:%d\n",
3532                                 propname, (2 * i) + 1, ret);
3533                         return -EINVAL;
3534                 }
3535 
3536                 widgets[i].name = wname;
3537         }
3538 
3539         card->of_dapm_widgets = widgets;
3540         card->num_of_dapm_widgets = num_widgets;
3541 
3542         return 0;
3543 }
3544 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3545 
3546 static int snd_soc_of_get_slot_mask(struct device_node *np,
3547                                     const char *prop_name,
3548                                     unsigned int *mask)
3549 {
3550         u32 val;
3551         const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3552         int i;
3553 
3554         if (!of_slot_mask)
3555                 return 0;
3556         val /= sizeof(u32);
3557         for (i = 0; i < val; i++)
3558                 if (be32_to_cpup(&of_slot_mask[i]))
3559                         *mask |= (1 << i);
3560 
3561         return val;
3562 }
3563 
3564 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3565                               unsigned int *tx_mask,
3566                               unsigned int *rx_mask,
3567                               unsigned int *slots,
3568                               unsigned int *slot_width)
3569 {
3570         u32 val;
3571         int ret;
3572 
3573         if (tx_mask)
3574                 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3575         if (rx_mask)
3576                 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3577 
3578         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3579                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3580                 if (ret)
3581                         return ret;
3582 
3583                 if (slots)
3584                         *slots = val;
3585         }
3586 
3587         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3588                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3589                 if (ret)
3590                         return ret;
3591 
3592                 if (slot_width)
3593                         *slot_width = val;
3594         }
3595 
3596         return 0;
3597 }
3598 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3599 
3600 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
3601                                    struct snd_soc_codec_conf *codec_conf,
3602                                    struct device_node *of_node,
3603                                    const char *propname)
3604 {
3605         struct device_node *np = card->dev->of_node;
3606         const char *str;
3607         int ret;
3608 
3609         ret = of_property_read_string(np, propname, &str);
3610         if (ret < 0) {
3611                 /* no prefix is not error */
3612                 return;
3613         }
3614 
3615         codec_conf->of_node     = of_node;
3616         codec_conf->name_prefix = str;
3617 }
3618 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
3619 
3620 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3621                                    const char *propname)
3622 {
3623         struct device_node *np = card->dev->of_node;
3624         int num_routes;
3625         struct snd_soc_dapm_route *routes;
3626         int i, ret;
3627 
3628         num_routes = of_property_count_strings(np, propname);
3629         if (num_routes < 0 || num_routes & 1) {
3630                 dev_err(card->dev,
3631                         "ASoC: Property '%s' does not exist or its length is not even\n",
3632                         propname);
3633                 return -EINVAL;
3634         }
3635         num_routes /= 2;
3636         if (!num_routes) {
3637                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3638                         propname);
3639                 return -EINVAL;
3640         }
3641 
3642         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3643                               GFP_KERNEL);
3644         if (!routes) {
3645                 dev_err(card->dev,
3646                         "ASoC: Could not allocate DAPM route table\n");
3647                 return -EINVAL;
3648         }
3649 
3650         for (i = 0; i < num_routes; i++) {
3651                 ret = of_property_read_string_index(np, propname,
3652                         2 * i, &routes[i].sink);
3653                 if (ret) {
3654                         dev_err(card->dev,
3655                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3656                                 propname, 2 * i, ret);
3657                         return -EINVAL;
3658                 }
3659                 ret = of_property_read_string_index(np, propname,
3660                         (2 * i) + 1, &routes[i].source);
3661                 if (ret) {
3662                         dev_err(card->dev,
3663                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3664                                 propname, (2 * i) + 1, ret);
3665                         return -EINVAL;
3666                 }
3667         }
3668 
3669         card->num_of_dapm_routes = num_routes;
3670         card->of_dapm_routes = routes;
3671 
3672         return 0;
3673 }
3674 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3675 
3676 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3677                                      const char *prefix,
3678                                      struct device_node **bitclkmaster,
3679                                      struct device_node **framemaster)
3680 {
3681         int ret, i;
3682         char prop[128];
3683         unsigned int format = 0;
3684         int bit, frame;
3685         const char *str;
3686         struct {
3687                 char *name;
3688                 unsigned int val;
3689         } of_fmt_table[] = {
3690                 { "i2s",        SND_SOC_DAIFMT_I2S },
3691                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
3692                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
3693                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
3694                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
3695                 { "ac97",       SND_SOC_DAIFMT_AC97 },
3696                 { "pdm",        SND_SOC_DAIFMT_PDM},
3697                 { "msb",        SND_SOC_DAIFMT_MSB },
3698                 { "lsb",        SND_SOC_DAIFMT_LSB },
3699         };
3700 
3701         if (!prefix)
3702                 prefix = "";
3703 
3704         /*
3705          * check "[prefix]format = xxx"
3706          * SND_SOC_DAIFMT_FORMAT_MASK area
3707          */
3708         snprintf(prop, sizeof(prop), "%sformat", prefix);
3709         ret = of_property_read_string(np, prop, &str);
3710         if (ret == 0) {
3711                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3712                         if (strcmp(str, of_fmt_table[i].name) == 0) {
3713                                 format |= of_fmt_table[i].val;
3714                                 break;
3715                         }
3716                 }
3717         }
3718 
3719         /*
3720          * check "[prefix]continuous-clock"
3721          * SND_SOC_DAIFMT_CLOCK_MASK area
3722          */
3723         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3724         if (of_get_property(np, prop, NULL))
3725                 format |= SND_SOC_DAIFMT_CONT;
3726         else
3727                 format |= SND_SOC_DAIFMT_GATED;
3728 
3729         /*
3730          * check "[prefix]bitclock-inversion"
3731          * check "[prefix]frame-inversion"
3732          * SND_SOC_DAIFMT_INV_MASK area
3733          */
3734         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3735         bit = !!of_get_property(np, prop, NULL);
3736 
3737         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3738         frame = !!of_get_property(np, prop, NULL);
3739 
3740         switch ((bit << 4) + frame) {
3741         case 0x11:
3742                 format |= SND_SOC_DAIFMT_IB_IF;
3743                 break;
3744         case 0x10:
3745                 format |= SND_SOC_DAIFMT_IB_NF;
3746                 break;
3747         case 0x01:
3748                 format |= SND_SOC_DAIFMT_NB_IF;
3749                 break;
3750         default:
3751                 /* SND_SOC_DAIFMT_NB_NF is default */
3752                 break;
3753         }
3754 
3755         /*
3756          * check "[prefix]bitclock-master"
3757          * check "[prefix]frame-master"
3758          * SND_SOC_DAIFMT_MASTER_MASK area
3759          */
3760         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3761         bit = !!of_get_property(np, prop, NULL);
3762         if (bit && bitclkmaster)
3763                 *bitclkmaster = of_parse_phandle(np, prop, 0);
3764 
3765         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3766         frame = !!of_get_property(np, prop, NULL);
3767         if (frame && framemaster)
3768                 *framemaster = of_parse_phandle(np, prop, 0);
3769 
3770         switch ((bit << 4) + frame) {
3771         case 0x11:
3772                 format |= SND_SOC_DAIFMT_CBM_CFM;
3773                 break;
3774         case 0x10:
3775                 format |= SND_SOC_DAIFMT_CBM_CFS;
3776                 break;
3777         case 0x01:
3778                 format |= SND_SOC_DAIFMT_CBS_CFM;
3779                 break;
3780         default:
3781                 format |= SND_SOC_DAIFMT_CBS_CFS;
3782                 break;
3783         }
3784 
3785         return format;
3786 }
3787 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3788 
3789 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3790                                 const char **dai_name)
3791 {
3792         struct snd_soc_component *pos;
3793         struct device_node *component_of_node;
3794         int ret = -EPROBE_DEFER;
3795 
3796         mutex_lock(&client_mutex);
3797         list_for_each_entry(pos, &component_list, list) {
3798                 component_of_node = pos->dev->of_node;
3799                 if (!component_of_node && pos->dev->parent)
3800                         component_of_node = pos->dev->parent->of_node;
3801 
3802                 if (component_of_node != args->np)
3803                         continue;
3804 
3805                 if (pos->driver->of_xlate_dai_name) {
3806                         ret = pos->driver->of_xlate_dai_name(pos,
3807                                                              args,
3808                                                              dai_name);
3809                 } else {
3810                         int id = -1;
3811 
3812                         switch (args->args_count) {
3813                         case 0:
3814                                 id = 0; /* same as dai_drv[0] */
3815                                 break;
3816                         case 1:
3817                                 id = args->args[0];
3818                                 break;
3819                         default:
3820                                 /* not supported */
3821                                 break;
3822                         }
3823 
3824                         if (id < 0 || id >= pos->num_dai) {
3825                                 ret = -EINVAL;
3826                                 continue;
3827                         }
3828 
3829                         ret = 0;
3830 
3831                         *dai_name = pos->dai_drv[id].name;
3832                         if (!*dai_name)
3833                                 *dai_name = pos->name;
3834                 }
3835 
3836                 break;
3837         }
3838         mutex_unlock(&client_mutex);
3839         return ret;
3840 }
3841 
3842 int snd_soc_of_get_dai_name(struct device_node *of_node,
3843                             const char **dai_name)
3844 {
3845         struct of_phandle_args args;
3846         int ret;
3847 
3848         ret = of_parse_phandle_with_args(of_node, "sound-dai",
3849                                          "#sound-dai-cells", 0, &args);
3850         if (ret)
3851                 return ret;
3852 
3853         ret = snd_soc_get_dai_name(&args, dai_name);
3854 
3855         of_node_put(args.np);
3856 
3857         return ret;
3858 }
3859 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3860 
3861 /*
3862  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3863  * @dev: Card device
3864  * @of_node: Device node
3865  * @dai_link: DAI link
3866  *
3867  * Builds an array of CODEC DAI components from the DAI link property
3868  * 'sound-dai'.
3869  * The array is set in the DAI link and the number of DAIs is set accordingly.
3870  * The device nodes in the array (of_node) must be dereferenced by the caller.
3871  *
3872  * Returns 0 for success
3873  */
3874 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3875                                    struct device_node *of_node,
3876                                    struct snd_soc_dai_link *dai_link)
3877 {
3878         struct of_phandle_args args;
3879         struct snd_soc_dai_link_component *component;
3880         char *name;
3881         int index, num_codecs, ret;
3882 
3883         /* Count the number of CODECs */
3884         name = "sound-dai";
3885         num_codecs = of_count_phandle_with_args(of_node, name,
3886                                                 "#sound-dai-cells");
3887         if (num_codecs <= 0) {
3888                 if (num_codecs == -ENOENT)
3889                         dev_err(dev, "No 'sound-dai' property\n");
3890                 else
3891                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
3892                 return num_codecs;
3893         }
3894         component = devm_kzalloc(dev,
3895                                  sizeof *component * num_codecs,
3896                                  GFP_KERNEL);
3897         if (!component)
3898                 return -ENOMEM;
3899         dai_link->codecs = component;
3900         dai_link->num_codecs = num_codecs;
3901 
3902         /* Parse the list */
3903         for (index = 0, component = dai_link->codecs;
3904              index < dai_link->num_codecs;
3905              index++, component++) {
3906                 ret = of_parse_phandle_with_args(of_node, name,
3907                                                  "#sound-dai-cells",
3908                                                   index, &args);
3909                 if (ret)
3910                         goto err;
3911                 component->of_node = args.np;
3912                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3913                 if (ret < 0)
3914                         goto err;
3915         }
3916         return 0;
3917 err:
3918         for (index = 0, component = dai_link->codecs;
3919              index < dai_link->num_codecs;
3920              index++, component++) {
3921                 if (!component->of_node)
3922                         break;
3923                 of_node_put(component->of_node);
3924                 component->of_node = NULL;
3925         }
3926         dai_link->codecs = NULL;
3927         dai_link->num_codecs = 0;
3928         return ret;
3929 }
3930 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3931 
3932 static int __init snd_soc_init(void)
3933 {
3934         snd_soc_debugfs_init();
3935         snd_soc_util_init();
3936 
3937         return platform_driver_register(&soc_driver);
3938 }
3939 module_init(snd_soc_init);
3940 
3941 static void __exit snd_soc_exit(void)
3942 {
3943         snd_soc_util_exit();
3944         snd_soc_debugfs_exit();
3945 
3946 #ifdef CONFIG_DEBUG_FS
3947 #endif
3948         platform_driver_unregister(&soc_driver);
3949 }
3950 module_exit(snd_soc_exit);
3951 
3952 /* Module information */
3953 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3954 MODULE_DESCRIPTION("ALSA SoC Core");
3955 MODULE_LICENSE("GPL");
3956 MODULE_ALIAS("platform:soc-audio");
3957 

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