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Linux/sound/soc/soc-core.c

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  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 <linux/of_graph.h>
 38 #include <linux/dmi.h>
 39 #include <sound/core.h>
 40 #include <sound/jack.h>
 41 #include <sound/pcm.h>
 42 #include <sound/pcm_params.h>
 43 #include <sound/soc.h>
 44 #include <sound/soc-dpcm.h>
 45 #include <sound/soc-topology.h>
 46 #include <sound/initval.h>
 47 
 48 #define CREATE_TRACE_POINTS
 49 #include <trace/events/asoc.h>
 50 
 51 #define NAME_SIZE       32
 52 
 53 #ifdef CONFIG_DEBUG_FS
 54 struct dentry *snd_soc_debugfs_root;
 55 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
 56 #endif
 57 
 58 static DEFINE_MUTEX(client_mutex);
 59 static LIST_HEAD(platform_list);
 60 static LIST_HEAD(codec_list);
 61 static LIST_HEAD(component_list);
 62 
 63 /*
 64  * This is a timeout to do a DAPM powerdown after a stream is closed().
 65  * It can be used to eliminate pops between different playback streams, e.g.
 66  * between two audio tracks.
 67  */
 68 static int pmdown_time = 5000;
 69 module_param(pmdown_time, int, 0);
 70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
 71 
 72 /* If a DMI filed contain strings in this blacklist (e.g.
 73  * "Type2 - Board Manufacturer" or  "Type1 - TBD by OEM"), it will be taken
 74  * as invalid and dropped when setting the card long name from DMI info.
 75  */
 76 static const char * const dmi_blacklist[] = {
 77         "To be filled by OEM",
 78         "TBD by OEM",
 79         "Default String",
 80         "Board Manufacturer",
 81         "Board Vendor Name",
 82         "Board Product Name",
 83         NULL,   /* terminator */
 84 };
 85 
 86 /* returns the minimum number of bytes needed to represent
 87  * a particular given value */
 88 static int min_bytes_needed(unsigned long val)
 89 {
 90         int c = 0;
 91         int i;
 92 
 93         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
 94                 if (val & (1UL << i))
 95                         break;
 96         c = (sizeof val * 8) - c;
 97         if (!c || (c % 8))
 98                 c = (c + 8) / 8;
 99         else
100                 c /= 8;
101         return c;
102 }
103 
104 /* fill buf which is 'len' bytes with a formatted
105  * string of the form 'reg: value\n' */
106 static int format_register_str(struct snd_soc_codec *codec,
107                                unsigned int reg, char *buf, size_t len)
108 {
109         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
110         int regsize = codec->driver->reg_word_size * 2;
111         int ret;
112 
113         /* +2 for ': ' and + 1 for '\n' */
114         if (wordsize + regsize + 2 + 1 != len)
115                 return -EINVAL;
116 
117         sprintf(buf, "%.*x: ", wordsize, reg);
118         buf += wordsize + 2;
119 
120         ret = snd_soc_read(codec, reg);
121         if (ret < 0)
122                 memset(buf, 'X', regsize);
123         else
124                 sprintf(buf, "%.*x", regsize, ret);
125         buf[regsize] = '\n';
126         /* no NUL-termination needed */
127         return 0;
128 }
129 
130 /* codec register dump */
131 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
132                                   size_t count, loff_t pos)
133 {
134         int i, step = 1;
135         int wordsize, regsize;
136         int len;
137         size_t total = 0;
138         loff_t p = 0;
139 
140         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
141         regsize = codec->driver->reg_word_size * 2;
142 
143         len = wordsize + regsize + 2 + 1;
144 
145         if (!codec->driver->reg_cache_size)
146                 return 0;
147 
148         if (codec->driver->reg_cache_step)
149                 step = codec->driver->reg_cache_step;
150 
151         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
152                 /* only support larger than PAGE_SIZE bytes debugfs
153                  * entries for the default case */
154                 if (p >= pos) {
155                         if (total + len >= count - 1)
156                                 break;
157                         format_register_str(codec, i, buf + total, len);
158                         total += len;
159                 }
160                 p += len;
161         }
162 
163         total = min(total, count - 1);
164 
165         return total;
166 }
167 
168 static ssize_t codec_reg_show(struct device *dev,
169         struct device_attribute *attr, char *buf)
170 {
171         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
172 
173         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
174 }
175 
176 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
177 
178 static ssize_t pmdown_time_show(struct device *dev,
179                                 struct device_attribute *attr, char *buf)
180 {
181         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
182 
183         return sprintf(buf, "%ld\n", rtd->pmdown_time);
184 }
185 
186 static ssize_t pmdown_time_set(struct device *dev,
187                                struct device_attribute *attr,
188                                const char *buf, size_t count)
189 {
190         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
191         int ret;
192 
193         ret = kstrtol(buf, 10, &rtd->pmdown_time);
194         if (ret)
195                 return ret;
196 
197         return count;
198 }
199 
200 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
201 
202 static struct attribute *soc_dev_attrs[] = {
203         &dev_attr_codec_reg.attr,
204         &dev_attr_pmdown_time.attr,
205         NULL
206 };
207 
208 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
209                                        struct attribute *attr, int idx)
210 {
211         struct device *dev = kobj_to_dev(kobj);
212         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
213 
214         if (attr == &dev_attr_pmdown_time.attr)
215                 return attr->mode; /* always visible */
216         return rtd->codec ? attr->mode : 0; /* enabled only with codec */
217 }
218 
219 static const struct attribute_group soc_dapm_dev_group = {
220         .attrs = soc_dapm_dev_attrs,
221         .is_visible = soc_dev_attr_is_visible,
222 };
223 
224 static const struct attribute_group soc_dev_roup = {
225         .attrs = soc_dev_attrs,
226         .is_visible = soc_dev_attr_is_visible,
227 };
228 
229 static const struct attribute_group *soc_dev_attr_groups[] = {
230         &soc_dapm_dev_group,
231         &soc_dev_roup,
232         NULL
233 };
234 
235 #ifdef CONFIG_DEBUG_FS
236 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
237                                    size_t count, loff_t *ppos)
238 {
239         ssize_t ret;
240         struct snd_soc_codec *codec = file->private_data;
241         char *buf;
242 
243         if (*ppos < 0 || !count)
244                 return -EINVAL;
245 
246         buf = kmalloc(count, GFP_KERNEL);
247         if (!buf)
248                 return -ENOMEM;
249 
250         ret = soc_codec_reg_show(codec, buf, count, *ppos);
251         if (ret >= 0) {
252                 if (copy_to_user(user_buf, buf, ret)) {
253                         kfree(buf);
254                         return -EFAULT;
255                 }
256                 *ppos += ret;
257         }
258 
259         kfree(buf);
260         return ret;
261 }
262 
263 static ssize_t codec_reg_write_file(struct file *file,
264                 const char __user *user_buf, size_t count, loff_t *ppos)
265 {
266         char buf[32];
267         size_t buf_size;
268         char *start = buf;
269         unsigned long reg, value;
270         struct snd_soc_codec *codec = file->private_data;
271         int ret;
272 
273         buf_size = min(count, (sizeof(buf)-1));
274         if (copy_from_user(buf, user_buf, buf_size))
275                 return -EFAULT;
276         buf[buf_size] = 0;
277 
278         while (*start == ' ')
279                 start++;
280         reg = simple_strtoul(start, &start, 16);
281         while (*start == ' ')
282                 start++;
283         ret = kstrtoul(start, 16, &value);
284         if (ret)
285                 return ret;
286 
287         /* Userspace has been fiddling around behind the kernel's back */
288         add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
289 
290         snd_soc_write(codec, reg, value);
291         return buf_size;
292 }
293 
294 static const struct file_operations codec_reg_fops = {
295         .open = simple_open,
296         .read = codec_reg_read_file,
297         .write = codec_reg_write_file,
298         .llseek = default_llseek,
299 };
300 
301 static void soc_init_component_debugfs(struct snd_soc_component *component)
302 {
303         if (!component->card->debugfs_card_root)
304                 return;
305 
306         if (component->debugfs_prefix) {
307                 char *name;
308 
309                 name = kasprintf(GFP_KERNEL, "%s:%s",
310                         component->debugfs_prefix, component->name);
311                 if (name) {
312                         component->debugfs_root = debugfs_create_dir(name,
313                                 component->card->debugfs_card_root);
314                         kfree(name);
315                 }
316         } else {
317                 component->debugfs_root = debugfs_create_dir(component->name,
318                                 component->card->debugfs_card_root);
319         }
320 
321         if (!component->debugfs_root) {
322                 dev_warn(component->dev,
323                         "ASoC: Failed to create component debugfs directory\n");
324                 return;
325         }
326 
327         snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
328                 component->debugfs_root);
329 
330         if (component->init_debugfs)
331                 component->init_debugfs(component);
332 }
333 
334 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
335 {
336         debugfs_remove_recursive(component->debugfs_root);
337 }
338 
339 static void soc_init_codec_debugfs(struct snd_soc_component *component)
340 {
341         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
342         struct dentry *debugfs_reg;
343 
344         debugfs_reg = debugfs_create_file("codec_reg", 0644,
345                                           codec->component.debugfs_root,
346                                           codec, &codec_reg_fops);
347         if (!debugfs_reg)
348                 dev_warn(codec->dev,
349                         "ASoC: Failed to create codec register debugfs file\n");
350 }
351 
352 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
353                                     size_t count, loff_t *ppos)
354 {
355         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356         ssize_t len, ret = 0;
357         struct snd_soc_codec *codec;
358 
359         if (!buf)
360                 return -ENOMEM;
361 
362         mutex_lock(&client_mutex);
363 
364         list_for_each_entry(codec, &codec_list, list) {
365                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
366                                codec->component.name);
367                 if (len >= 0)
368                         ret += len;
369                 if (ret > PAGE_SIZE) {
370                         ret = PAGE_SIZE;
371                         break;
372                 }
373         }
374 
375         mutex_unlock(&client_mutex);
376 
377         if (ret >= 0)
378                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
379 
380         kfree(buf);
381 
382         return ret;
383 }
384 
385 static const struct file_operations codec_list_fops = {
386         .read = codec_list_read_file,
387         .llseek = default_llseek,/* read accesses f_pos */
388 };
389 
390 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
391                                   size_t count, loff_t *ppos)
392 {
393         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
394         ssize_t len, ret = 0;
395         struct snd_soc_component *component;
396         struct snd_soc_dai *dai;
397 
398         if (!buf)
399                 return -ENOMEM;
400 
401         mutex_lock(&client_mutex);
402 
403         list_for_each_entry(component, &component_list, list) {
404                 list_for_each_entry(dai, &component->dai_list, list) {
405                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
406                                 dai->name);
407                         if (len >= 0)
408                                 ret += len;
409                         if (ret > PAGE_SIZE) {
410                                 ret = PAGE_SIZE;
411                                 break;
412                         }
413                 }
414         }
415 
416         mutex_unlock(&client_mutex);
417 
418         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
419 
420         kfree(buf);
421 
422         return ret;
423 }
424 
425 static const struct file_operations dai_list_fops = {
426         .read = dai_list_read_file,
427         .llseek = default_llseek,/* read accesses f_pos */
428 };
429 
430 static ssize_t platform_list_read_file(struct file *file,
431                                        char __user *user_buf,
432                                        size_t count, loff_t *ppos)
433 {
434         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
435         ssize_t len, ret = 0;
436         struct snd_soc_platform *platform;
437 
438         if (!buf)
439                 return -ENOMEM;
440 
441         mutex_lock(&client_mutex);
442 
443         list_for_each_entry(platform, &platform_list, list) {
444                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
445                                platform->component.name);
446                 if (len >= 0)
447                         ret += len;
448                 if (ret > PAGE_SIZE) {
449                         ret = PAGE_SIZE;
450                         break;
451                 }
452         }
453 
454         mutex_unlock(&client_mutex);
455 
456         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
457 
458         kfree(buf);
459 
460         return ret;
461 }
462 
463 static const struct file_operations platform_list_fops = {
464         .read = platform_list_read_file,
465         .llseek = default_llseek,/* read accesses f_pos */
466 };
467 
468 static void soc_init_card_debugfs(struct snd_soc_card *card)
469 {
470         if (!snd_soc_debugfs_root)
471                 return;
472 
473         card->debugfs_card_root = debugfs_create_dir(card->name,
474                                                      snd_soc_debugfs_root);
475         if (!card->debugfs_card_root) {
476                 dev_warn(card->dev,
477                          "ASoC: Failed to create card debugfs directory\n");
478                 return;
479         }
480 
481         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
482                                                     card->debugfs_card_root,
483                                                     &card->pop_time);
484         if (!card->debugfs_pop_time)
485                 dev_warn(card->dev,
486                        "ASoC: Failed to create pop time debugfs file\n");
487 }
488 
489 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
490 {
491         debugfs_remove_recursive(card->debugfs_card_root);
492 }
493 
494 
495 static void snd_soc_debugfs_init(void)
496 {
497         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
498         if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
499                 pr_warn("ASoC: Failed to create debugfs directory\n");
500                 snd_soc_debugfs_root = NULL;
501                 return;
502         }
503 
504         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
505                                  &codec_list_fops))
506                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
507 
508         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
509                                  &dai_list_fops))
510                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
511 
512         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
513                                  &platform_list_fops))
514                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
515 }
516 
517 static void snd_soc_debugfs_exit(void)
518 {
519         debugfs_remove_recursive(snd_soc_debugfs_root);
520 }
521 
522 #else
523 
524 #define soc_init_codec_debugfs NULL
525 
526 static inline void soc_init_component_debugfs(
527         struct snd_soc_component *component)
528 {
529 }
530 
531 static inline void soc_cleanup_component_debugfs(
532         struct snd_soc_component *component)
533 {
534 }
535 
536 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
537 {
538 }
539 
540 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
541 {
542 }
543 
544 static inline void snd_soc_debugfs_init(void)
545 {
546 }
547 
548 static inline void snd_soc_debugfs_exit(void)
549 {
550 }
551 
552 #endif
553 
554 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
555                               struct snd_soc_component *component)
556 {
557         struct snd_soc_rtdcom_list *rtdcom;
558         struct snd_soc_rtdcom_list *new_rtdcom;
559 
560         for_each_rtdcom(rtd, rtdcom) {
561                 /* already connected */
562                 if (rtdcom->component == component)
563                         return 0;
564         }
565 
566         new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
567         if (!new_rtdcom)
568                 return -ENOMEM;
569 
570         new_rtdcom->component = component;
571         INIT_LIST_HEAD(&new_rtdcom->list);
572 
573         list_add_tail(&new_rtdcom->list, &rtd->component_list);
574 
575         return 0;
576 }
577 
578 static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
579 {
580         struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
581 
582         for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
583                 kfree(rtdcom1);
584 
585         INIT_LIST_HEAD(&rtd->component_list);
586 }
587 
588 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
589                                                 const char *driver_name)
590 {
591         struct snd_soc_rtdcom_list *rtdcom;
592 
593         for_each_rtdcom(rtd, rtdcom) {
594                 if ((rtdcom->component->driver->name == driver_name) ||
595                     strcmp(rtdcom->component->driver->name, driver_name) == 0)
596                         return rtdcom->component;
597         }
598 
599         return NULL;
600 }
601 
602 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
603                 const char *dai_link, int stream)
604 {
605         struct snd_soc_pcm_runtime *rtd;
606 
607         list_for_each_entry(rtd, &card->rtd_list, list) {
608                 if (rtd->dai_link->no_pcm &&
609                         !strcmp(rtd->dai_link->name, dai_link))
610                         return rtd->pcm->streams[stream].substream;
611         }
612         dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
613         return NULL;
614 }
615 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
616 
617 static const struct snd_soc_ops null_snd_soc_ops;
618 
619 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
620         struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
621 {
622         struct snd_soc_pcm_runtime *rtd;
623 
624         rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
625         if (!rtd)
626                 return NULL;
627 
628         INIT_LIST_HEAD(&rtd->component_list);
629         rtd->card = card;
630         rtd->dai_link = dai_link;
631         if (!rtd->dai_link->ops)
632                 rtd->dai_link->ops = &null_snd_soc_ops;
633 
634         rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
635                                         dai_link->num_codecs,
636                                         GFP_KERNEL);
637         if (!rtd->codec_dais) {
638                 kfree(rtd);
639                 return NULL;
640         }
641 
642         return rtd;
643 }
644 
645 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
646 {
647         kfree(rtd->codec_dais);
648         snd_soc_rtdcom_del_all(rtd);
649         kfree(rtd);
650 }
651 
652 static void soc_add_pcm_runtime(struct snd_soc_card *card,
653                 struct snd_soc_pcm_runtime *rtd)
654 {
655         list_add_tail(&rtd->list, &card->rtd_list);
656         rtd->num = card->num_rtd;
657         card->num_rtd++;
658 }
659 
660 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
661 {
662         struct snd_soc_pcm_runtime *rtd, *_rtd;
663 
664         list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
665                 list_del(&rtd->list);
666                 soc_free_pcm_runtime(rtd);
667         }
668 
669         card->num_rtd = 0;
670 }
671 
672 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
673                 const char *dai_link)
674 {
675         struct snd_soc_pcm_runtime *rtd;
676 
677         list_for_each_entry(rtd, &card->rtd_list, list) {
678                 if (!strcmp(rtd->dai_link->name, dai_link))
679                         return rtd;
680         }
681         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
682         return NULL;
683 }
684 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
685 
686 static void codec2codec_close_delayed_work(struct work_struct *work)
687 {
688         /* Currently nothing to do for c2c links
689          * Since c2c links are internal nodes in the DAPM graph and
690          * don't interface with the outside world or application layer
691          * we don't have to do any special handling on close.
692          */
693 }
694 
695 #ifdef CONFIG_PM_SLEEP
696 /* powers down audio subsystem for suspend */
697 int snd_soc_suspend(struct device *dev)
698 {
699         struct snd_soc_card *card = dev_get_drvdata(dev);
700         struct snd_soc_component *component;
701         struct snd_soc_pcm_runtime *rtd;
702         int i;
703 
704         /* If the card is not initialized yet there is nothing to do */
705         if (!card->instantiated)
706                 return 0;
707 
708         /* Due to the resume being scheduled into a workqueue we could
709         * suspend before that's finished - wait for it to complete.
710          */
711         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
712 
713         /* we're going to block userspace touching us until resume completes */
714         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
715 
716         /* mute any active DACs */
717         list_for_each_entry(rtd, &card->rtd_list, list) {
718 
719                 if (rtd->dai_link->ignore_suspend)
720                         continue;
721 
722                 for (i = 0; i < rtd->num_codecs; i++) {
723                         struct snd_soc_dai *dai = rtd->codec_dais[i];
724                         struct snd_soc_dai_driver *drv = dai->driver;
725 
726                         if (drv->ops->digital_mute && dai->playback_active)
727                                 drv->ops->digital_mute(dai, 1);
728                 }
729         }
730 
731         /* suspend all pcms */
732         list_for_each_entry(rtd, &card->rtd_list, list) {
733                 if (rtd->dai_link->ignore_suspend)
734                         continue;
735 
736                 snd_pcm_suspend_all(rtd->pcm);
737         }
738 
739         if (card->suspend_pre)
740                 card->suspend_pre(card);
741 
742         list_for_each_entry(rtd, &card->rtd_list, list) {
743                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
744 
745                 if (rtd->dai_link->ignore_suspend)
746                         continue;
747 
748                 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
749                         cpu_dai->driver->suspend(cpu_dai);
750         }
751 
752         /* close any waiting streams */
753         list_for_each_entry(rtd, &card->rtd_list, list)
754                 flush_delayed_work(&rtd->delayed_work);
755 
756         list_for_each_entry(rtd, &card->rtd_list, list) {
757 
758                 if (rtd->dai_link->ignore_suspend)
759                         continue;
760 
761                 snd_soc_dapm_stream_event(rtd,
762                                           SNDRV_PCM_STREAM_PLAYBACK,
763                                           SND_SOC_DAPM_STREAM_SUSPEND);
764 
765                 snd_soc_dapm_stream_event(rtd,
766                                           SNDRV_PCM_STREAM_CAPTURE,
767                                           SND_SOC_DAPM_STREAM_SUSPEND);
768         }
769 
770         /* Recheck all endpoints too, their state is affected by suspend */
771         dapm_mark_endpoints_dirty(card);
772         snd_soc_dapm_sync(&card->dapm);
773 
774         /* suspend all COMPONENTs */
775         list_for_each_entry(component, &card->component_dev_list, card_list) {
776                 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
777 
778                 /* If there are paths active then the COMPONENT will be held with
779                  * bias _ON and should not be suspended. */
780                 if (!component->suspended) {
781                         switch (snd_soc_dapm_get_bias_level(dapm)) {
782                         case SND_SOC_BIAS_STANDBY:
783                                 /*
784                                  * If the COMPONENT is capable of idle
785                                  * bias off then being in STANDBY
786                                  * means it's doing something,
787                                  * otherwise fall through.
788                                  */
789                                 if (dapm->idle_bias_off) {
790                                         dev_dbg(component->dev,
791                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
792                                         break;
793                                 }
794 
795                         case SND_SOC_BIAS_OFF:
796                                 if (component->suspend)
797                                         component->suspend(component);
798                                 component->suspended = 1;
799                                 if (component->regmap)
800                                         regcache_mark_dirty(component->regmap);
801                                 /* deactivate pins to sleep state */
802                                 pinctrl_pm_select_sleep_state(component->dev);
803                                 break;
804                         default:
805                                 dev_dbg(component->dev,
806                                         "ASoC: COMPONENT is on over suspend\n");
807                                 break;
808                         }
809                 }
810         }
811 
812         list_for_each_entry(rtd, &card->rtd_list, list) {
813                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
814 
815                 if (rtd->dai_link->ignore_suspend)
816                         continue;
817 
818                 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
819                         cpu_dai->driver->suspend(cpu_dai);
820 
821                 /* deactivate pins to sleep state */
822                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
823         }
824 
825         if (card->suspend_post)
826                 card->suspend_post(card);
827 
828         return 0;
829 }
830 EXPORT_SYMBOL_GPL(snd_soc_suspend);
831 
832 /* deferred resume work, so resume can complete before we finished
833  * setting our codec back up, which can be very slow on I2C
834  */
835 static void soc_resume_deferred(struct work_struct *work)
836 {
837         struct snd_soc_card *card =
838                         container_of(work, struct snd_soc_card, deferred_resume_work);
839         struct snd_soc_pcm_runtime *rtd;
840         struct snd_soc_component *component;
841         int i;
842 
843         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
844          * so userspace apps are blocked from touching us
845          */
846 
847         dev_dbg(card->dev, "ASoC: starting resume work\n");
848 
849         /* Bring us up into D2 so that DAPM starts enabling things */
850         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
851 
852         if (card->resume_pre)
853                 card->resume_pre(card);
854 
855         /* resume control bus DAIs */
856         list_for_each_entry(rtd, &card->rtd_list, list) {
857                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
858 
859                 if (rtd->dai_link->ignore_suspend)
860                         continue;
861 
862                 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
863                         cpu_dai->driver->resume(cpu_dai);
864         }
865 
866         list_for_each_entry(component, &card->component_dev_list, card_list) {
867                 if (component->suspended) {
868                         if (component->resume)
869                                 component->resume(component);
870                         component->suspended = 0;
871                 }
872         }
873 
874         list_for_each_entry(rtd, &card->rtd_list, list) {
875 
876                 if (rtd->dai_link->ignore_suspend)
877                         continue;
878 
879                 snd_soc_dapm_stream_event(rtd,
880                                           SNDRV_PCM_STREAM_PLAYBACK,
881                                           SND_SOC_DAPM_STREAM_RESUME);
882 
883                 snd_soc_dapm_stream_event(rtd,
884                                           SNDRV_PCM_STREAM_CAPTURE,
885                                           SND_SOC_DAPM_STREAM_RESUME);
886         }
887 
888         /* unmute any active DACs */
889         list_for_each_entry(rtd, &card->rtd_list, list) {
890 
891                 if (rtd->dai_link->ignore_suspend)
892                         continue;
893 
894                 for (i = 0; i < rtd->num_codecs; i++) {
895                         struct snd_soc_dai *dai = rtd->codec_dais[i];
896                         struct snd_soc_dai_driver *drv = dai->driver;
897 
898                         if (drv->ops->digital_mute && dai->playback_active)
899                                 drv->ops->digital_mute(dai, 0);
900                 }
901         }
902 
903         list_for_each_entry(rtd, &card->rtd_list, list) {
904                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
905 
906                 if (rtd->dai_link->ignore_suspend)
907                         continue;
908 
909                 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
910                         cpu_dai->driver->resume(cpu_dai);
911         }
912 
913         if (card->resume_post)
914                 card->resume_post(card);
915 
916         dev_dbg(card->dev, "ASoC: resume work completed\n");
917 
918         /* Recheck all endpoints too, their state is affected by suspend */
919         dapm_mark_endpoints_dirty(card);
920         snd_soc_dapm_sync(&card->dapm);
921 
922         /* userspace can access us now we are back as we were before */
923         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
924 }
925 
926 /* powers up audio subsystem after a suspend */
927 int snd_soc_resume(struct device *dev)
928 {
929         struct snd_soc_card *card = dev_get_drvdata(dev);
930         bool bus_control = false;
931         struct snd_soc_pcm_runtime *rtd;
932 
933         /* If the card is not initialized yet there is nothing to do */
934         if (!card->instantiated)
935                 return 0;
936 
937         /* activate pins from sleep state */
938         list_for_each_entry(rtd, &card->rtd_list, list) {
939                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
940                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
941                 int j;
942 
943                 if (cpu_dai->active)
944                         pinctrl_pm_select_default_state(cpu_dai->dev);
945 
946                 for (j = 0; j < rtd->num_codecs; j++) {
947                         struct snd_soc_dai *codec_dai = codec_dais[j];
948                         if (codec_dai->active)
949                                 pinctrl_pm_select_default_state(codec_dai->dev);
950                 }
951         }
952 
953         /*
954          * DAIs that also act as the control bus master might have other drivers
955          * hanging off them so need to resume immediately. Other drivers don't
956          * have that problem and may take a substantial amount of time to resume
957          * due to I/O costs and anti-pop so handle them out of line.
958          */
959         list_for_each_entry(rtd, &card->rtd_list, list) {
960                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
961                 bus_control |= cpu_dai->driver->bus_control;
962         }
963         if (bus_control) {
964                 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
965                 soc_resume_deferred(&card->deferred_resume_work);
966         } else {
967                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
968                 if (!schedule_work(&card->deferred_resume_work))
969                         dev_err(dev, "ASoC: resume work item may be lost\n");
970         }
971 
972         return 0;
973 }
974 EXPORT_SYMBOL_GPL(snd_soc_resume);
975 #else
976 #define snd_soc_suspend NULL
977 #define snd_soc_resume NULL
978 #endif
979 
980 static const struct snd_soc_dai_ops null_dai_ops = {
981 };
982 
983 static struct snd_soc_component *soc_find_component(
984         const struct device_node *of_node, const char *name)
985 {
986         struct snd_soc_component *component;
987 
988         lockdep_assert_held(&client_mutex);
989 
990         list_for_each_entry(component, &component_list, list) {
991                 if (of_node) {
992                         if (component->dev->of_node == of_node)
993                                 return component;
994                 } else if (strcmp(component->name, name) == 0) {
995                         return component;
996                 }
997         }
998 
999         return NULL;
1000 }
1001 
1002 /**
1003  * snd_soc_find_dai - Find a registered DAI
1004  *
1005  * @dlc: name of the DAI or the DAI driver and optional component info to match
1006  *
1007  * This function will search all registered components and their DAIs to
1008  * find the DAI of the same name. The component's of_node and name
1009  * should also match if being specified.
1010  *
1011  * Return: pointer of DAI, or NULL if not found.
1012  */
1013 struct snd_soc_dai *snd_soc_find_dai(
1014         const struct snd_soc_dai_link_component *dlc)
1015 {
1016         struct snd_soc_component *component;
1017         struct snd_soc_dai *dai;
1018         struct device_node *component_of_node;
1019 
1020         lockdep_assert_held(&client_mutex);
1021 
1022         /* Find CPU DAI from registered DAIs*/
1023         list_for_each_entry(component, &component_list, list) {
1024                 component_of_node = component->dev->of_node;
1025                 if (!component_of_node && component->dev->parent)
1026                         component_of_node = component->dev->parent->of_node;
1027 
1028                 if (dlc->of_node && component_of_node != dlc->of_node)
1029                         continue;
1030                 if (dlc->name && strcmp(component->name, dlc->name))
1031                         continue;
1032                 list_for_each_entry(dai, &component->dai_list, list) {
1033                         if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
1034                             && (!dai->driver->name
1035                                 || strcmp(dai->driver->name, dlc->dai_name)))
1036                                 continue;
1037 
1038                         return dai;
1039                 }
1040         }
1041 
1042         return NULL;
1043 }
1044 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
1045 
1046 
1047 /**
1048  * snd_soc_find_dai_link - Find a DAI link
1049  *
1050  * @card: soc card
1051  * @id: DAI link ID to match
1052  * @name: DAI link name to match, optional
1053  * @stream_name: DAI link stream name to match, optional
1054  *
1055  * This function will search all existing DAI links of the soc card to
1056  * find the link of the same ID. Since DAI links may not have their
1057  * unique ID, so name and stream name should also match if being
1058  * specified.
1059  *
1060  * Return: pointer of DAI link, or NULL if not found.
1061  */
1062 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
1063                                                int id, const char *name,
1064                                                const char *stream_name)
1065 {
1066         struct snd_soc_dai_link *link, *_link;
1067 
1068         lockdep_assert_held(&client_mutex);
1069 
1070         list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1071                 if (link->id != id)
1072                         continue;
1073 
1074                 if (name && (!link->name || strcmp(name, link->name)))
1075                         continue;
1076 
1077                 if (stream_name && (!link->stream_name
1078                         || strcmp(stream_name, link->stream_name)))
1079                         continue;
1080 
1081                 return link;
1082         }
1083 
1084         return NULL;
1085 }
1086 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1087 
1088 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1089                 struct snd_soc_dai_link *dai_link)
1090 {
1091         struct snd_soc_pcm_runtime *rtd;
1092 
1093         list_for_each_entry(rtd, &card->rtd_list, list) {
1094                 if (rtd->dai_link == dai_link)
1095                         return true;
1096         }
1097 
1098         return false;
1099 }
1100 
1101 static int soc_bind_dai_link(struct snd_soc_card *card,
1102         struct snd_soc_dai_link *dai_link)
1103 {
1104         struct snd_soc_pcm_runtime *rtd;
1105         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1106         struct snd_soc_dai_link_component cpu_dai_component;
1107         struct snd_soc_component *component;
1108         struct snd_soc_dai **codec_dais;
1109         struct snd_soc_platform *platform;
1110         struct device_node *platform_of_node;
1111         const char *platform_name;
1112         int i;
1113 
1114         dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1115 
1116         if (soc_is_dai_link_bound(card, dai_link)) {
1117                 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1118                         dai_link->name);
1119                 return 0;
1120         }
1121 
1122         rtd = soc_new_pcm_runtime(card, dai_link);
1123         if (!rtd)
1124                 return -ENOMEM;
1125 
1126         cpu_dai_component.name = dai_link->cpu_name;
1127         cpu_dai_component.of_node = dai_link->cpu_of_node;
1128         cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1129         rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1130         if (!rtd->cpu_dai) {
1131                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1132                         dai_link->cpu_dai_name);
1133                 goto _err_defer;
1134         }
1135         snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1136 
1137         rtd->num_codecs = dai_link->num_codecs;
1138 
1139         /* Find CODEC from registered CODECs */
1140         codec_dais = rtd->codec_dais;
1141         for (i = 0; i < rtd->num_codecs; i++) {
1142                 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1143                 if (!codec_dais[i]) {
1144                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1145                                 codecs[i].dai_name);
1146                         goto _err_defer;
1147                 }
1148                 snd_soc_rtdcom_add(rtd, codec_dais[i]->component);
1149         }
1150 
1151         /* Single codec links expect codec and codec_dai in runtime data */
1152         rtd->codec_dai = codec_dais[0];
1153         rtd->codec = rtd->codec_dai->codec;
1154 
1155         /* if there's no platform we match on the empty platform */
1156         platform_name = dai_link->platform_name;
1157         if (!platform_name && !dai_link->platform_of_node)
1158                 platform_name = "snd-soc-dummy";
1159 
1160         /* find one from the set of registered platforms */
1161         list_for_each_entry(component, &component_list, list) {
1162                 platform_of_node = component->dev->of_node;
1163                 if (!platform_of_node && component->dev->parent->of_node)
1164                         platform_of_node = component->dev->parent->of_node;
1165 
1166                 if (dai_link->platform_of_node) {
1167                         if (platform_of_node != dai_link->platform_of_node)
1168                                 continue;
1169                 } else {
1170                         if (strcmp(component->name, platform_name))
1171                                 continue;
1172                 }
1173 
1174                 snd_soc_rtdcom_add(rtd, component);
1175         }
1176 
1177         /* find one from the set of registered platforms */
1178         list_for_each_entry(platform, &platform_list, list) {
1179                 platform_of_node = platform->dev->of_node;
1180                 if (!platform_of_node && platform->dev->parent->of_node)
1181                         platform_of_node = platform->dev->parent->of_node;
1182 
1183                 if (dai_link->platform_of_node) {
1184                         if (platform_of_node != dai_link->platform_of_node)
1185                                 continue;
1186                 } else {
1187                         if (strcmp(platform->component.name, platform_name))
1188                                 continue;
1189                 }
1190 
1191                 rtd->platform = platform;
1192         }
1193         if (!rtd->platform) {
1194                 dev_err(card->dev, "ASoC: platform %s not registered\n",
1195                         dai_link->platform_name);
1196                 goto _err_defer;
1197         }
1198 
1199         soc_add_pcm_runtime(card, rtd);
1200         return 0;
1201 
1202 _err_defer:
1203         soc_free_pcm_runtime(rtd);
1204         return  -EPROBE_DEFER;
1205 }
1206 
1207 static void soc_remove_component(struct snd_soc_component *component)
1208 {
1209         if (!component->card)
1210                 return;
1211 
1212         list_del(&component->card_list);
1213 
1214         if (component->remove)
1215                 component->remove(component);
1216 
1217         snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1218 
1219         soc_cleanup_component_debugfs(component);
1220         component->card = NULL;
1221         module_put(component->dev->driver->owner);
1222 }
1223 
1224 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1225 {
1226         int err;
1227 
1228         if (dai && dai->probed &&
1229                         dai->driver->remove_order == order) {
1230                 if (dai->driver->remove) {
1231                         err = dai->driver->remove(dai);
1232                         if (err < 0)
1233                                 dev_err(dai->dev,
1234                                         "ASoC: failed to remove %s: %d\n",
1235                                         dai->name, err);
1236                 }
1237                 dai->probed = 0;
1238         }
1239 }
1240 
1241 static void soc_remove_link_dais(struct snd_soc_card *card,
1242                 struct snd_soc_pcm_runtime *rtd, int order)
1243 {
1244         int i;
1245 
1246         /* unregister the rtd device */
1247         if (rtd->dev_registered) {
1248                 device_unregister(rtd->dev);
1249                 rtd->dev_registered = 0;
1250         }
1251 
1252         /* remove the CODEC DAI */
1253         for (i = 0; i < rtd->num_codecs; i++)
1254                 soc_remove_dai(rtd->codec_dais[i], order);
1255 
1256         soc_remove_dai(rtd->cpu_dai, order);
1257 }
1258 
1259 static void soc_remove_link_components(struct snd_soc_card *card,
1260         struct snd_soc_pcm_runtime *rtd, int order)
1261 {
1262         struct snd_soc_component *component;
1263         struct snd_soc_rtdcom_list *rtdcom;
1264 
1265         for_each_rtdcom(rtd, rtdcom) {
1266                 component = rtdcom->component;
1267 
1268                 if (component->driver->remove_order == order)
1269                         soc_remove_component(component);
1270         }
1271 }
1272 
1273 static void soc_remove_dai_links(struct snd_soc_card *card)
1274 {
1275         int order;
1276         struct snd_soc_pcm_runtime *rtd;
1277         struct snd_soc_dai_link *link, *_link;
1278 
1279         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1280                         order++) {
1281                 list_for_each_entry(rtd, &card->rtd_list, list)
1282                         soc_remove_link_dais(card, rtd, order);
1283         }
1284 
1285         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1286                         order++) {
1287                 list_for_each_entry(rtd, &card->rtd_list, list)
1288                         soc_remove_link_components(card, rtd, order);
1289         }
1290 
1291         list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1292                 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1293                         dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1294                                 link->name);
1295 
1296                 list_del(&link->list);
1297                 card->num_dai_links--;
1298         }
1299 }
1300 
1301 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1302                                    struct snd_soc_dai_link *dai_link)
1303 {
1304         /* Legacy codec/codec_dai link is a single entry in multicodec */
1305         if (dai_link->codec_name || dai_link->codec_of_node ||
1306             dai_link->codec_dai_name) {
1307                 dai_link->num_codecs = 1;
1308 
1309                 dai_link->codecs = devm_kzalloc(card->dev,
1310                                 sizeof(struct snd_soc_dai_link_component),
1311                                 GFP_KERNEL);
1312                 if (!dai_link->codecs)
1313                         return -ENOMEM;
1314 
1315                 dai_link->codecs[0].name = dai_link->codec_name;
1316                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1317                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1318         }
1319 
1320         if (!dai_link->codecs) {
1321                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1322                 return -EINVAL;
1323         }
1324 
1325         return 0;
1326 }
1327 
1328 static int soc_init_dai_link(struct snd_soc_card *card,
1329                                    struct snd_soc_dai_link *link)
1330 {
1331         int i, ret;
1332 
1333         ret = snd_soc_init_multicodec(card, link);
1334         if (ret) {
1335                 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1336                 return ret;
1337         }
1338 
1339         for (i = 0; i < link->num_codecs; i++) {
1340                 /*
1341                  * Codec must be specified by 1 of name or OF node,
1342                  * not both or neither.
1343                  */
1344                 if (!!link->codecs[i].name ==
1345                     !!link->codecs[i].of_node) {
1346                         dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1347                                 link->name);
1348                         return -EINVAL;
1349                 }
1350                 /* Codec DAI name must be specified */
1351                 if (!link->codecs[i].dai_name) {
1352                         dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1353                                 link->name);
1354                         return -EINVAL;
1355                 }
1356         }
1357 
1358         /*
1359          * Platform may be specified by either name or OF node, but
1360          * can be left unspecified, and a dummy platform will be used.
1361          */
1362         if (link->platform_name && link->platform_of_node) {
1363                 dev_err(card->dev,
1364                         "ASoC: Both platform name/of_node are set for %s\n",
1365                         link->name);
1366                 return -EINVAL;
1367         }
1368 
1369         /*
1370          * CPU device may be specified by either name or OF node, but
1371          * can be left unspecified, and will be matched based on DAI
1372          * name alone..
1373          */
1374         if (link->cpu_name && link->cpu_of_node) {
1375                 dev_err(card->dev,
1376                         "ASoC: Neither/both cpu name/of_node are set for %s\n",
1377                         link->name);
1378                 return -EINVAL;
1379         }
1380         /*
1381          * At least one of CPU DAI name or CPU device name/node must be
1382          * specified
1383          */
1384         if (!link->cpu_dai_name &&
1385             !(link->cpu_name || link->cpu_of_node)) {
1386                 dev_err(card->dev,
1387                         "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1388                         link->name);
1389                 return -EINVAL;
1390         }
1391 
1392         return 0;
1393 }
1394 
1395 /**
1396  * snd_soc_add_dai_link - Add a DAI link dynamically
1397  * @card: The ASoC card to which the DAI link is added
1398  * @dai_link: The new DAI link to add
1399  *
1400  * This function adds a DAI link to the ASoC card's link list.
1401  *
1402  * Note: Topology can use this API to add DAI links when probing the
1403  * topology component. And machine drivers can still define static
1404  * DAI links in dai_link array.
1405  */
1406 int snd_soc_add_dai_link(struct snd_soc_card *card,
1407                 struct snd_soc_dai_link *dai_link)
1408 {
1409         if (dai_link->dobj.type
1410             && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1411                 dev_err(card->dev, "Invalid dai link type %d\n",
1412                         dai_link->dobj.type);
1413                 return -EINVAL;
1414         }
1415 
1416         lockdep_assert_held(&client_mutex);
1417         /* Notify the machine driver for extra initialization
1418          * on the link created by topology.
1419          */
1420         if (dai_link->dobj.type && card->add_dai_link)
1421                 card->add_dai_link(card, dai_link);
1422 
1423         list_add_tail(&dai_link->list, &card->dai_link_list);
1424         card->num_dai_links++;
1425 
1426         return 0;
1427 }
1428 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1429 
1430 /**
1431  * snd_soc_remove_dai_link - Remove a DAI link from the list
1432  * @card: The ASoC card that owns the link
1433  * @dai_link: The DAI link to remove
1434  *
1435  * This function removes a DAI link from the ASoC card's link list.
1436  *
1437  * For DAI links previously added by topology, topology should
1438  * remove them by using the dobj embedded in the link.
1439  */
1440 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1441                              struct snd_soc_dai_link *dai_link)
1442 {
1443         struct snd_soc_dai_link *link, *_link;
1444 
1445         if (dai_link->dobj.type
1446             && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1447                 dev_err(card->dev, "Invalid dai link type %d\n",
1448                         dai_link->dobj.type);
1449                 return;
1450         }
1451 
1452         lockdep_assert_held(&client_mutex);
1453         /* Notify the machine driver for extra destruction
1454          * on the link created by topology.
1455          */
1456         if (dai_link->dobj.type && card->remove_dai_link)
1457                 card->remove_dai_link(card, dai_link);
1458 
1459         list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1460                 if (link == dai_link) {
1461                         list_del(&link->list);
1462                         card->num_dai_links--;
1463                         return;
1464                 }
1465         }
1466 }
1467 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1468 
1469 static void soc_set_name_prefix(struct snd_soc_card *card,
1470                                 struct snd_soc_component *component)
1471 {
1472         int i;
1473 
1474         if (card->codec_conf == NULL)
1475                 return;
1476 
1477         for (i = 0; i < card->num_configs; i++) {
1478                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1479                 if (map->of_node && component->dev->of_node != map->of_node)
1480                         continue;
1481                 if (map->dev_name && strcmp(component->name, map->dev_name))
1482                         continue;
1483                 component->name_prefix = map->name_prefix;
1484                 break;
1485         }
1486 }
1487 
1488 static int soc_probe_component(struct snd_soc_card *card,
1489         struct snd_soc_component *component)
1490 {
1491         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1492         struct snd_soc_dai *dai;
1493         int ret;
1494 
1495         if (!strcmp(component->name, "snd-soc-dummy"))
1496                 return 0;
1497 
1498         if (component->card) {
1499                 if (component->card != card) {
1500                         dev_err(component->dev,
1501                                 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1502                                 card->name, component->card->name);
1503                         return -ENODEV;
1504                 }
1505                 return 0;
1506         }
1507 
1508         if (!try_module_get(component->dev->driver->owner))
1509                 return -ENODEV;
1510 
1511         component->card = card;
1512         dapm->card = card;
1513         soc_set_name_prefix(card, component);
1514 
1515         soc_init_component_debugfs(component);
1516 
1517         if (component->driver->dapm_widgets) {
1518                 ret = snd_soc_dapm_new_controls(dapm,
1519                                         component->driver->dapm_widgets,
1520                                         component->driver->num_dapm_widgets);
1521 
1522                 if (ret != 0) {
1523                         dev_err(component->dev,
1524                                 "Failed to create new controls %d\n", ret);
1525                         goto err_probe;
1526                 }
1527         }
1528 
1529         list_for_each_entry(dai, &component->dai_list, list) {
1530                 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1531                 if (ret != 0) {
1532                         dev_err(component->dev,
1533                                 "Failed to create DAI widgets %d\n", ret);
1534                         goto err_probe;
1535                 }
1536         }
1537 
1538         if (component->probe) {
1539                 ret = component->probe(component);
1540                 if (ret < 0) {
1541                         dev_err(component->dev,
1542                                 "ASoC: failed to probe component %d\n", ret);
1543                         goto err_probe;
1544                 }
1545 
1546                 WARN(dapm->idle_bias_off &&
1547                         dapm->bias_level != SND_SOC_BIAS_OFF,
1548                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1549                         component->name);
1550         }
1551 
1552         /* machine specific init */
1553         if (component->init) {
1554                 ret = component->init(component);
1555                 if (ret < 0) {
1556                         dev_err(component->dev,
1557                                 "Failed to do machine specific init %d\n", ret);
1558                         goto err_probe;
1559                 }
1560         }
1561 
1562         if (component->driver->controls)
1563                 snd_soc_add_component_controls(component,
1564                                                component->driver->controls,
1565                                                component->driver->num_controls);
1566         if (component->driver->dapm_routes)
1567                 snd_soc_dapm_add_routes(dapm,
1568                                         component->driver->dapm_routes,
1569                                         component->driver->num_dapm_routes);
1570 
1571         list_add(&dapm->list, &card->dapm_list);
1572         list_add(&component->card_list, &card->component_dev_list);
1573 
1574         return 0;
1575 
1576 err_probe:
1577         soc_cleanup_component_debugfs(component);
1578         component->card = NULL;
1579         module_put(component->dev->driver->owner);
1580 
1581         return ret;
1582 }
1583 
1584 static void rtd_release(struct device *dev)
1585 {
1586         kfree(dev);
1587 }
1588 
1589 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1590         const char *name)
1591 {
1592         int ret = 0;
1593 
1594         /* register the rtd device */
1595         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1596         if (!rtd->dev)
1597                 return -ENOMEM;
1598         device_initialize(rtd->dev);
1599         rtd->dev->parent = rtd->card->dev;
1600         rtd->dev->release = rtd_release;
1601         rtd->dev->groups = soc_dev_attr_groups;
1602         dev_set_name(rtd->dev, "%s", name);
1603         dev_set_drvdata(rtd->dev, rtd);
1604         mutex_init(&rtd->pcm_mutex);
1605         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1606         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1607         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1608         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1609         ret = device_add(rtd->dev);
1610         if (ret < 0) {
1611                 /* calling put_device() here to free the rtd->dev */
1612                 put_device(rtd->dev);
1613                 dev_err(rtd->card->dev,
1614                         "ASoC: failed to register runtime device: %d\n", ret);
1615                 return ret;
1616         }
1617         rtd->dev_registered = 1;
1618         return 0;
1619 }
1620 
1621 static int soc_probe_link_components(struct snd_soc_card *card,
1622                         struct snd_soc_pcm_runtime *rtd,
1623                                      int order)
1624 {
1625         struct snd_soc_component *component;
1626         struct snd_soc_rtdcom_list *rtdcom;
1627         int ret;
1628 
1629         for_each_rtdcom(rtd, rtdcom) {
1630                 component = rtdcom->component;
1631 
1632                 if (component->driver->probe_order == order) {
1633                         ret = soc_probe_component(card, component);
1634                         if (ret < 0)
1635                                 return ret;
1636                 }
1637         }
1638 
1639         return 0;
1640 }
1641 
1642 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1643 {
1644         int ret;
1645 
1646         if (!dai->probed && dai->driver->probe_order == order) {
1647                 if (dai->driver->probe) {
1648                         ret = dai->driver->probe(dai);
1649                         if (ret < 0) {
1650                                 dev_err(dai->dev,
1651                                         "ASoC: failed to probe DAI %s: %d\n",
1652                                         dai->name, ret);
1653                                 return ret;
1654                         }
1655                 }
1656 
1657                 dai->probed = 1;
1658         }
1659 
1660         return 0;
1661 }
1662 
1663 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1664                                 struct snd_soc_pcm_runtime *rtd)
1665 {
1666         int i, ret = 0;
1667 
1668         for (i = 0; i < num_dais; ++i) {
1669                 struct snd_soc_dai_driver *drv = dais[i]->driver;
1670 
1671                 if (!rtd->dai_link->no_pcm && drv->pcm_new)
1672                         ret = drv->pcm_new(rtd, dais[i]);
1673                 if (ret < 0) {
1674                         dev_err(dais[i]->dev,
1675                                 "ASoC: Failed to bind %s with pcm device\n",
1676                                 dais[i]->name);
1677                         return ret;
1678                 }
1679         }
1680 
1681         return 0;
1682 }
1683 
1684 static int soc_link_dai_widgets(struct snd_soc_card *card,
1685                                 struct snd_soc_dai_link *dai_link,
1686                                 struct snd_soc_pcm_runtime *rtd)
1687 {
1688         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1689         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1690         struct snd_soc_dapm_widget *sink, *source;
1691         int ret;
1692 
1693         if (rtd->num_codecs > 1)
1694                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1695 
1696         /* link the DAI widgets */
1697         sink = codec_dai->playback_widget;
1698         source = cpu_dai->capture_widget;
1699         if (sink && source) {
1700                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1701                                            dai_link->num_params,
1702                                            source, sink);
1703                 if (ret != 0) {
1704                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1705                                 sink->name, source->name, ret);
1706                         return ret;
1707                 }
1708         }
1709 
1710         sink = cpu_dai->playback_widget;
1711         source = codec_dai->capture_widget;
1712         if (sink && source) {
1713                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1714                                            dai_link->num_params,
1715                                            source, sink);
1716                 if (ret != 0) {
1717                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1718                                 sink->name, source->name, ret);
1719                         return ret;
1720                 }
1721         }
1722 
1723         return 0;
1724 }
1725 
1726 static int soc_probe_link_dais(struct snd_soc_card *card,
1727                 struct snd_soc_pcm_runtime *rtd, int order)
1728 {
1729         struct snd_soc_dai_link *dai_link = rtd->dai_link;
1730         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1731         int i, ret;
1732 
1733         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1734                         card->name, rtd->num, order);
1735 
1736         /* set default power off timeout */
1737         rtd->pmdown_time = pmdown_time;
1738 
1739         ret = soc_probe_dai(cpu_dai, order);
1740         if (ret)
1741                 return ret;
1742 
1743         /* probe the CODEC DAI */
1744         for (i = 0; i < rtd->num_codecs; i++) {
1745                 ret = soc_probe_dai(rtd->codec_dais[i], order);
1746                 if (ret)
1747                         return ret;
1748         }
1749 
1750         /* complete DAI probe during last probe */
1751         if (order != SND_SOC_COMP_ORDER_LAST)
1752                 return 0;
1753 
1754         /* do machine specific initialization */
1755         if (dai_link->init) {
1756                 ret = dai_link->init(rtd);
1757                 if (ret < 0) {
1758                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1759                                 dai_link->name, ret);
1760                         return ret;
1761                 }
1762         }
1763 
1764         if (dai_link->dai_fmt)
1765                 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1766 
1767         ret = soc_post_component_init(rtd, dai_link->name);
1768         if (ret)
1769                 return ret;
1770 
1771 #ifdef CONFIG_DEBUG_FS
1772         /* add DPCM sysfs entries */
1773         if (dai_link->dynamic)
1774                 soc_dpcm_debugfs_add(rtd);
1775 #endif
1776 
1777         if (cpu_dai->driver->compress_new) {
1778                 /*create compress_device"*/
1779                 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1780                 if (ret < 0) {
1781                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1782                                          dai_link->stream_name);
1783                         return ret;
1784                 }
1785         } else {
1786 
1787                 if (!dai_link->params) {
1788                         /* create the pcm */
1789                         ret = soc_new_pcm(rtd, rtd->num);
1790                         if (ret < 0) {
1791                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1792                                        dai_link->stream_name, ret);
1793                                 return ret;
1794                         }
1795                         ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1796                         if (ret < 0)
1797                                 return ret;
1798                         ret = soc_link_dai_pcm_new(rtd->codec_dais,
1799                                                    rtd->num_codecs, rtd);
1800                         if (ret < 0)
1801                                 return ret;
1802                 } else {
1803                         INIT_DELAYED_WORK(&rtd->delayed_work,
1804                                                 codec2codec_close_delayed_work);
1805 
1806                         /* link the DAI widgets */
1807                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1808                         if (ret)
1809                                 return ret;
1810                 }
1811         }
1812 
1813         return 0;
1814 }
1815 
1816 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1817 {
1818         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1819         struct snd_soc_component *component;
1820         const char *name;
1821         struct device_node *codec_of_node;
1822 
1823         if (aux_dev->codec_of_node || aux_dev->codec_name) {
1824                 /* codecs, usually analog devices */
1825                 name = aux_dev->codec_name;
1826                 codec_of_node = aux_dev->codec_of_node;
1827                 component = soc_find_component(codec_of_node, name);
1828                 if (!component) {
1829                         if (codec_of_node)
1830                                 name = of_node_full_name(codec_of_node);
1831                         goto err_defer;
1832                 }
1833         } else if (aux_dev->name) {
1834                 /* generic components */
1835                 name = aux_dev->name;
1836                 component = soc_find_component(NULL, name);
1837                 if (!component)
1838                         goto err_defer;
1839         } else {
1840                 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1841                 return -EINVAL;
1842         }
1843 
1844         component->init = aux_dev->init;
1845         list_add(&component->card_aux_list, &card->aux_comp_list);
1846 
1847         return 0;
1848 
1849 err_defer:
1850         dev_err(card->dev, "ASoC: %s not registered\n", name);
1851         return -EPROBE_DEFER;
1852 }
1853 
1854 static int soc_probe_aux_devices(struct snd_soc_card *card)
1855 {
1856         struct snd_soc_component *comp;
1857         int order;
1858         int ret;
1859 
1860         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1861                 order++) {
1862                 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1863                         if (comp->driver->probe_order == order) {
1864                                 ret = soc_probe_component(card, comp);
1865                                 if (ret < 0) {
1866                                         dev_err(card->dev,
1867                                                 "ASoC: failed to probe aux component %s %d\n",
1868                                                 comp->name, ret);
1869                                         return ret;
1870                                 }
1871                         }
1872                 }
1873         }
1874 
1875         return 0;
1876 }
1877 
1878 static void soc_remove_aux_devices(struct snd_soc_card *card)
1879 {
1880         struct snd_soc_component *comp, *_comp;
1881         int order;
1882 
1883         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1884                 order++) {
1885                 list_for_each_entry_safe(comp, _comp,
1886                         &card->aux_comp_list, card_aux_list) {
1887 
1888                         if (comp->driver->remove_order == order) {
1889                                 soc_remove_component(comp);
1890                                 /* remove it from the card's aux_comp_list */
1891                                 list_del(&comp->card_aux_list);
1892                         }
1893                 }
1894         }
1895 }
1896 
1897 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1898 {
1899         int ret;
1900 
1901         if (codec->cache_init)
1902                 return 0;
1903 
1904         ret = snd_soc_cache_init(codec);
1905         if (ret < 0) {
1906                 dev_err(codec->dev,
1907                         "ASoC: Failed to set cache compression type: %d\n",
1908                         ret);
1909                 return ret;
1910         }
1911         codec->cache_init = 1;
1912         return 0;
1913 }
1914 
1915 /**
1916  * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1917  * @rtd: The runtime for which the DAI link format should be changed
1918  * @dai_fmt: The new DAI link format
1919  *
1920  * This function updates the DAI link format for all DAIs connected to the DAI
1921  * link for the specified runtime.
1922  *
1923  * Note: For setups with a static format set the dai_fmt field in the
1924  * corresponding snd_dai_link struct instead of using this function.
1925  *
1926  * Returns 0 on success, otherwise a negative error code.
1927  */
1928 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1929         unsigned int dai_fmt)
1930 {
1931         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1932         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1933         unsigned int i;
1934         int ret;
1935 
1936         for (i = 0; i < rtd->num_codecs; i++) {
1937                 struct snd_soc_dai *codec_dai = codec_dais[i];
1938 
1939                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1940                 if (ret != 0 && ret != -ENOTSUPP) {
1941                         dev_warn(codec_dai->dev,
1942                                  "ASoC: Failed to set DAI format: %d\n", ret);
1943                         return ret;
1944                 }
1945         }
1946 
1947         /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1948         if (cpu_dai->codec) {
1949                 unsigned int inv_dai_fmt;
1950 
1951                 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1952                 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1953                 case SND_SOC_DAIFMT_CBM_CFM:
1954                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1955                         break;
1956                 case SND_SOC_DAIFMT_CBM_CFS:
1957                         inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1958                         break;
1959                 case SND_SOC_DAIFMT_CBS_CFM:
1960                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1961                         break;
1962                 case SND_SOC_DAIFMT_CBS_CFS:
1963                         inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1964                         break;
1965                 }
1966 
1967                 dai_fmt = inv_dai_fmt;
1968         }
1969 
1970         ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1971         if (ret != 0 && ret != -ENOTSUPP) {
1972                 dev_warn(cpu_dai->dev,
1973                          "ASoC: Failed to set DAI format: %d\n", ret);
1974                 return ret;
1975         }
1976 
1977         return 0;
1978 }
1979 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1980 
1981 
1982 #ifdef CONFIG_DMI
1983 /* Trim special characters, and replace '-' with '_' since '-' is used to
1984  * separate different DMI fields in the card long name. Only number and
1985  * alphabet characters and a few separator characters are kept.
1986  */
1987 static void cleanup_dmi_name(char *name)
1988 {
1989         int i, j = 0;
1990 
1991         for (i = 0; name[i]; i++) {
1992                 if (isalnum(name[i]) || (name[i] == '.')
1993                     || (name[i] == '_'))
1994                         name[j++] = name[i];
1995                 else if (name[i] == '-')
1996                         name[j++] = '_';
1997         }
1998 
1999         name[j] = '\0';
2000 }
2001 
2002 /* Check if a DMI field is valid, i.e. not containing any string
2003  * in the black list.
2004  */
2005 static int is_dmi_valid(const char *field)
2006 {
2007         int i = 0;
2008 
2009         while (dmi_blacklist[i]) {
2010                 if (strstr(field, dmi_blacklist[i]))
2011                         return 0;
2012                 i++;
2013         }
2014 
2015         return 1;
2016 }
2017 
2018 /**
2019  * snd_soc_set_dmi_name() - Register DMI names to card
2020  * @card: The card to register DMI names
2021  * @flavour: The flavour "differentiator" for the card amongst its peers.
2022  *
2023  * An Intel machine driver may be used by many different devices but are
2024  * difficult for userspace to differentiate, since machine drivers ususally
2025  * use their own name as the card short name and leave the card long name
2026  * blank. To differentiate such devices and fix bugs due to lack of
2027  * device-specific configurations, this function allows DMI info to be used
2028  * as the sound card long name, in the format of
2029  * "vendor-product-version-board"
2030  * (Character '-' is used to separate different DMI fields here).
2031  * This will help the user space to load the device-specific Use Case Manager
2032  * (UCM) configurations for the card.
2033  *
2034  * Possible card long names may be:
2035  * DellInc.-XPS139343-01-0310JH
2036  * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
2037  * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
2038  *
2039  * This function also supports flavoring the card longname to provide
2040  * the extra differentiation, like "vendor-product-version-board-flavor".
2041  *
2042  * We only keep number and alphabet characters and a few separator characters
2043  * in the card long name since UCM in the user space uses the card long names
2044  * as card configuration directory names and AudoConf cannot support special
2045  * charactors like SPACE.
2046  *
2047  * Returns 0 on success, otherwise a negative error code.
2048  */
2049 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
2050 {
2051         const char *vendor, *product, *product_version, *board;
2052         size_t longname_buf_size = sizeof(card->snd_card->longname);
2053         size_t len;
2054 
2055         if (card->long_name)
2056                 return 0; /* long name already set by driver or from DMI */
2057 
2058         /* make up dmi long name as: vendor.product.version.board */
2059         vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2060         if (!vendor || !is_dmi_valid(vendor)) {
2061                 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
2062                 return 0;
2063         }
2064 
2065 
2066         snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
2067                          "%s", vendor);
2068         cleanup_dmi_name(card->dmi_longname);
2069 
2070         product = dmi_get_system_info(DMI_PRODUCT_NAME);
2071         if (product && is_dmi_valid(product)) {
2072                 len = strlen(card->dmi_longname);
2073                 snprintf(card->dmi_longname + len,
2074                          longname_buf_size - len,
2075                          "-%s", product);
2076 
2077                 len++;  /* skip the separator "-" */
2078                 if (len < longname_buf_size)
2079                         cleanup_dmi_name(card->dmi_longname + len);
2080 
2081                 /* some vendors like Lenovo may only put a self-explanatory
2082                  * name in the product version field
2083                  */
2084                 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
2085                 if (product_version && is_dmi_valid(product_version)) {
2086                         len = strlen(card->dmi_longname);
2087                         snprintf(card->dmi_longname + len,
2088                                  longname_buf_size - len,
2089                                  "-%s", product_version);
2090 
2091                         len++;
2092                         if (len < longname_buf_size)
2093                                 cleanup_dmi_name(card->dmi_longname + len);
2094                 }
2095         }
2096 
2097         board = dmi_get_system_info(DMI_BOARD_NAME);
2098         if (board && is_dmi_valid(board)) {
2099                 len = strlen(card->dmi_longname);
2100                 snprintf(card->dmi_longname + len,
2101                          longname_buf_size - len,
2102                          "-%s", board);
2103 
2104                 len++;
2105                 if (len < longname_buf_size)
2106                         cleanup_dmi_name(card->dmi_longname + len);
2107         } else if (!product) {
2108                 /* fall back to using legacy name */
2109                 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
2110                 return 0;
2111         }
2112 
2113         /* Add flavour to dmi long name */
2114         if (flavour) {
2115                 len = strlen(card->dmi_longname);
2116                 snprintf(card->dmi_longname + len,
2117                          longname_buf_size - len,
2118                          "-%s", flavour);
2119 
2120                 len++;
2121                 if (len < longname_buf_size)
2122                         cleanup_dmi_name(card->dmi_longname + len);
2123         }
2124 
2125         /* set the card long name */
2126         card->long_name = card->dmi_longname;
2127 
2128         return 0;
2129 }
2130 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
2131 #endif /* CONFIG_DMI */
2132 
2133 static int snd_soc_instantiate_card(struct snd_soc_card *card)
2134 {
2135         struct snd_soc_codec *codec;
2136         struct snd_soc_pcm_runtime *rtd;
2137         struct snd_soc_dai_link *dai_link;
2138         int ret, i, order;
2139 
2140         mutex_lock(&client_mutex);
2141         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2142 
2143         /* bind DAIs */
2144         for (i = 0; i < card->num_links; i++) {
2145                 ret = soc_bind_dai_link(card, &card->dai_link[i]);
2146                 if (ret != 0)
2147                         goto base_error;
2148         }
2149 
2150         /* bind aux_devs too */
2151         for (i = 0; i < card->num_aux_devs; i++) {
2152                 ret = soc_bind_aux_dev(card, i);
2153                 if (ret != 0)
2154                         goto base_error;
2155         }
2156 
2157         /* add predefined DAI links to the list */
2158         for (i = 0; i < card->num_links; i++)
2159                 snd_soc_add_dai_link(card, card->dai_link+i);
2160 
2161         /* initialize the register cache for each available codec */
2162         list_for_each_entry(codec, &codec_list, list) {
2163                 if (codec->cache_init)
2164                         continue;
2165                 ret = snd_soc_init_codec_cache(codec);
2166                 if (ret < 0)
2167                         goto base_error;
2168         }
2169 
2170         /* card bind complete so register a sound card */
2171         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2172                         card->owner, 0, &card->snd_card);
2173         if (ret < 0) {
2174                 dev_err(card->dev,
2175                         "ASoC: can't create sound card for card %s: %d\n",
2176                         card->name, ret);
2177                 goto base_error;
2178         }
2179 
2180         soc_init_card_debugfs(card);
2181 
2182         card->dapm.bias_level = SND_SOC_BIAS_OFF;
2183         card->dapm.dev = card->dev;
2184         card->dapm.card = card;
2185         list_add(&card->dapm.list, &card->dapm_list);
2186 
2187 #ifdef CONFIG_DEBUG_FS
2188         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2189 #endif
2190 
2191 #ifdef CONFIG_PM_SLEEP
2192         /* deferred resume work */
2193         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2194 #endif
2195 
2196         if (card->dapm_widgets)
2197                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2198                                           card->num_dapm_widgets);
2199 
2200         if (card->of_dapm_widgets)
2201                 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2202                                           card->num_of_dapm_widgets);
2203 
2204         /* initialise the sound card only once */
2205         if (card->probe) {
2206                 ret = card->probe(card);
2207                 if (ret < 0)
2208                         goto card_probe_error;
2209         }
2210 
2211         /* probe all components used by DAI links on this card */
2212         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2213                         order++) {
2214                 list_for_each_entry(rtd, &card->rtd_list, list) {
2215                         ret = soc_probe_link_components(card, rtd, order);
2216                         if (ret < 0) {
2217                                 dev_err(card->dev,
2218                                         "ASoC: failed to instantiate card %d\n",
2219                                         ret);
2220                                 goto probe_dai_err;
2221                         }
2222                 }
2223         }
2224 
2225         /* probe auxiliary components */
2226         ret = soc_probe_aux_devices(card);
2227         if (ret < 0)
2228                 goto probe_dai_err;
2229 
2230         /* Find new DAI links added during probing components and bind them.
2231          * Components with topology may bring new DAIs and DAI links.
2232          */
2233         list_for_each_entry(dai_link, &card->dai_link_list, list) {
2234                 if (soc_is_dai_link_bound(card, dai_link))
2235                         continue;
2236 
2237                 ret = soc_init_dai_link(card, dai_link);
2238                 if (ret)
2239                         goto probe_dai_err;
2240                 ret = soc_bind_dai_link(card, dai_link);
2241                 if (ret)
2242                         goto probe_dai_err;
2243         }
2244 
2245         /* probe all DAI links on this card */
2246         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2247                         order++) {
2248                 list_for_each_entry(rtd, &card->rtd_list, list) {
2249                         ret = soc_probe_link_dais(card, rtd, order);
2250                         if (ret < 0) {
2251                                 dev_err(card->dev,
2252                                         "ASoC: failed to instantiate card %d\n",
2253                                         ret);
2254                                 goto probe_dai_err;
2255                         }
2256                 }
2257         }
2258 
2259         snd_soc_dapm_link_dai_widgets(card);
2260         snd_soc_dapm_connect_dai_link_widgets(card);
2261 
2262         if (card->controls)
2263                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2264 
2265         if (card->dapm_routes)
2266                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2267                                         card->num_dapm_routes);
2268 
2269         if (card->of_dapm_routes)
2270                 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2271                                         card->num_of_dapm_routes);
2272 
2273         /* try to set some sane longname if DMI is available */
2274         snd_soc_set_dmi_name(card, NULL);
2275 
2276         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2277                  "%s", card->name);
2278         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2279                  "%s", card->long_name ? card->long_name : card->name);
2280         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2281                  "%s", card->driver_name ? card->driver_name : card->name);
2282         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2283                 switch (card->snd_card->driver[i]) {
2284                 case '_':
2285                 case '-':
2286                 case '\0':
2287                         break;
2288                 default:
2289                         if (!isalnum(card->snd_card->driver[i]))
2290                                 card->snd_card->driver[i] = '_';
2291                         break;
2292                 }
2293         }
2294 
2295         if (card->late_probe) {
2296                 ret = card->late_probe(card);
2297                 if (ret < 0) {
2298                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2299                                 card->name, ret);
2300                         goto probe_aux_dev_err;
2301                 }
2302         }
2303 
2304         snd_soc_dapm_new_widgets(card);
2305 
2306         ret = snd_card_register(card->snd_card);
2307         if (ret < 0) {
2308                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2309                                 ret);
2310                 goto probe_aux_dev_err;
2311         }
2312 
2313         card->instantiated = 1;
2314         snd_soc_dapm_sync(&card->dapm);
2315         mutex_unlock(&card->mutex);
2316         mutex_unlock(&client_mutex);
2317 
2318         return 0;
2319 
2320 probe_aux_dev_err:
2321         soc_remove_aux_devices(card);
2322 
2323 probe_dai_err:
2324         soc_remove_dai_links(card);
2325 
2326 card_probe_error:
2327         if (card->remove)
2328                 card->remove(card);
2329 
2330         snd_soc_dapm_free(&card->dapm);
2331         soc_cleanup_card_debugfs(card);
2332         snd_card_free(card->snd_card);
2333 
2334 base_error:
2335         soc_remove_pcm_runtimes(card);
2336         mutex_unlock(&card->mutex);
2337         mutex_unlock(&client_mutex);
2338 
2339         return ret;
2340 }
2341 
2342 /* probes a new socdev */
2343 static int soc_probe(struct platform_device *pdev)
2344 {
2345         struct snd_soc_card *card = platform_get_drvdata(pdev);
2346 
2347         /*
2348          * no card, so machine driver should be registering card
2349          * we should not be here in that case so ret error
2350          */
2351         if (!card)
2352                 return -EINVAL;
2353 
2354         dev_warn(&pdev->dev,
2355                  "ASoC: machine %s should use snd_soc_register_card()\n",
2356                  card->name);
2357 
2358         /* Bodge while we unpick instantiation */
2359         card->dev = &pdev->dev;
2360 
2361         return snd_soc_register_card(card);
2362 }
2363 
2364 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2365 {
2366         struct snd_soc_pcm_runtime *rtd;
2367 
2368         /* make sure any delayed work runs */
2369         list_for_each_entry(rtd, &card->rtd_list, list)
2370                 flush_delayed_work(&rtd->delayed_work);
2371 
2372         /* free the ALSA card at first; this syncs with pending operations */
2373         snd_card_free(card->snd_card);
2374 
2375         /* remove and free each DAI */
2376         soc_remove_dai_links(card);
2377         soc_remove_pcm_runtimes(card);
2378 
2379         /* remove auxiliary devices */
2380         soc_remove_aux_devices(card);
2381 
2382         snd_soc_dapm_free(&card->dapm);
2383         soc_cleanup_card_debugfs(card);
2384 
2385         /* remove the card */
2386         if (card->remove)
2387                 card->remove(card);
2388 
2389         return 0;
2390 }
2391 
2392 /* removes a socdev */
2393 static int soc_remove(struct platform_device *pdev)
2394 {
2395         struct snd_soc_card *card = platform_get_drvdata(pdev);
2396 
2397         snd_soc_unregister_card(card);
2398         return 0;
2399 }
2400 
2401 int snd_soc_poweroff(struct device *dev)
2402 {
2403         struct snd_soc_card *card = dev_get_drvdata(dev);
2404         struct snd_soc_pcm_runtime *rtd;
2405 
2406         if (!card->instantiated)
2407                 return 0;
2408 
2409         /* Flush out pmdown_time work - we actually do want to run it
2410          * now, we're shutting down so no imminent restart. */
2411         list_for_each_entry(rtd, &card->rtd_list, list)
2412                 flush_delayed_work(&rtd->delayed_work);
2413 
2414         snd_soc_dapm_shutdown(card);
2415 
2416         /* deactivate pins to sleep state */
2417         list_for_each_entry(rtd, &card->rtd_list, list) {
2418                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2419                 int i;
2420 
2421                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2422                 for (i = 0; i < rtd->num_codecs; i++) {
2423                         struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2424                         pinctrl_pm_select_sleep_state(codec_dai->dev);
2425                 }
2426         }
2427 
2428         return 0;
2429 }
2430 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2431 
2432 const struct dev_pm_ops snd_soc_pm_ops = {
2433         .suspend = snd_soc_suspend,
2434         .resume = snd_soc_resume,
2435         .freeze = snd_soc_suspend,
2436         .thaw = snd_soc_resume,
2437         .poweroff = snd_soc_poweroff,
2438         .restore = snd_soc_resume,
2439 };
2440 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2441 
2442 /* ASoC platform driver */
2443 static struct platform_driver soc_driver = {
2444         .driver         = {
2445                 .name           = "soc-audio",
2446                 .pm             = &snd_soc_pm_ops,
2447         },
2448         .probe          = soc_probe,
2449         .remove         = soc_remove,
2450 };
2451 
2452 /**
2453  * snd_soc_cnew - create new control
2454  * @_template: control template
2455  * @data: control private data
2456  * @long_name: control long name
2457  * @prefix: control name prefix
2458  *
2459  * Create a new mixer control from a template control.
2460  *
2461  * Returns 0 for success, else error.
2462  */
2463 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2464                                   void *data, const char *long_name,
2465                                   const char *prefix)
2466 {
2467         struct snd_kcontrol_new template;
2468         struct snd_kcontrol *kcontrol;
2469         char *name = NULL;
2470 
2471         memcpy(&template, _template, sizeof(template));
2472         template.index = 0;
2473 
2474         if (!long_name)
2475                 long_name = template.name;
2476 
2477         if (prefix) {
2478                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2479                 if (!name)
2480                         return NULL;
2481 
2482                 template.name = name;
2483         } else {
2484                 template.name = long_name;
2485         }
2486 
2487         kcontrol = snd_ctl_new1(&template, data);
2488 
2489         kfree(name);
2490 
2491         return kcontrol;
2492 }
2493 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2494 
2495 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2496         const struct snd_kcontrol_new *controls, int num_controls,
2497         const char *prefix, void *data)
2498 {
2499         int err, i;
2500 
2501         for (i = 0; i < num_controls; i++) {
2502                 const struct snd_kcontrol_new *control = &controls[i];
2503                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2504                                                      control->name, prefix));
2505                 if (err < 0) {
2506                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
2507                                 control->name, err);
2508                         return err;
2509                 }
2510         }
2511 
2512         return 0;
2513 }
2514 
2515 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2516                                                const char *name)
2517 {
2518         struct snd_card *card = soc_card->snd_card;
2519         struct snd_kcontrol *kctl;
2520 
2521         if (unlikely(!name))
2522                 return NULL;
2523 
2524         list_for_each_entry(kctl, &card->controls, list)
2525                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2526                         return kctl;
2527         return NULL;
2528 }
2529 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2530 
2531 /**
2532  * snd_soc_add_component_controls - Add an array of controls to a component.
2533  *
2534  * @component: Component to add controls to
2535  * @controls: Array of controls to add
2536  * @num_controls: Number of elements in the array
2537  *
2538  * Return: 0 for success, else error.
2539  */
2540 int snd_soc_add_component_controls(struct snd_soc_component *component,
2541         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2542 {
2543         struct snd_card *card = component->card->snd_card;
2544 
2545         return snd_soc_add_controls(card, component->dev, controls,
2546                         num_controls, component->name_prefix, component);
2547 }
2548 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2549 
2550 /**
2551  * snd_soc_add_codec_controls - add an array of controls to a codec.
2552  * Convenience function to add a list of controls. Many codecs were
2553  * duplicating this code.
2554  *
2555  * @codec: codec to add controls to
2556  * @controls: array of controls to add
2557  * @num_controls: number of elements in the array
2558  *
2559  * Return 0 for success, else error.
2560  */
2561 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2562         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2563 {
2564         return snd_soc_add_component_controls(&codec->component, controls,
2565                 num_controls);
2566 }
2567 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2568 
2569 /**
2570  * snd_soc_add_platform_controls - add an array of controls to a platform.
2571  * Convenience function to add a list of controls.
2572  *
2573  * @platform: platform to add controls to
2574  * @controls: array of controls to add
2575  * @num_controls: number of elements in the array
2576  *
2577  * Return 0 for success, else error.
2578  */
2579 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2580         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2581 {
2582         return snd_soc_add_component_controls(&platform->component, controls,
2583                 num_controls);
2584 }
2585 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2586 
2587 /**
2588  * snd_soc_add_card_controls - add an array of controls to a SoC card.
2589  * Convenience function to add a list of controls.
2590  *
2591  * @soc_card: SoC card to add controls to
2592  * @controls: array of controls to add
2593  * @num_controls: number of elements in the array
2594  *
2595  * Return 0 for success, else error.
2596  */
2597 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2598         const struct snd_kcontrol_new *controls, int num_controls)
2599 {
2600         struct snd_card *card = soc_card->snd_card;
2601 
2602         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2603                         NULL, soc_card);
2604 }
2605 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2606 
2607 /**
2608  * snd_soc_add_dai_controls - add an array of controls to a DAI.
2609  * Convienience function to add a list of controls.
2610  *
2611  * @dai: DAI to add controls to
2612  * @controls: array of controls to add
2613  * @num_controls: number of elements in the array
2614  *
2615  * Return 0 for success, else error.
2616  */
2617 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2618         const struct snd_kcontrol_new *controls, int num_controls)
2619 {
2620         struct snd_card *card = dai->component->card->snd_card;
2621 
2622         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2623                         NULL, dai);
2624 }
2625 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2626 
2627 /**
2628  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2629  * @dai: DAI
2630  * @clk_id: DAI specific clock ID
2631  * @freq: new clock frequency in Hz
2632  * @dir: new clock direction - input/output.
2633  *
2634  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2635  */
2636 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2637         unsigned int freq, int dir)
2638 {
2639         if (dai->driver->ops->set_sysclk)
2640                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2641 
2642         return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2643                                             freq, dir);
2644 }
2645 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2646 
2647 /**
2648  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2649  * @codec: CODEC
2650  * @clk_id: DAI specific clock ID
2651  * @source: Source for the clock
2652  * @freq: new clock frequency in Hz
2653  * @dir: new clock direction - input/output.
2654  *
2655  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2656  */
2657 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2658                              int source, unsigned int freq, int dir)
2659 {
2660         if (codec->driver->set_sysclk)
2661                 return codec->driver->set_sysclk(codec, clk_id, source,
2662                                                  freq, dir);
2663         else
2664                 return -ENOTSUPP;
2665 }
2666 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2667 
2668 /**
2669  * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2670  * @component: COMPONENT
2671  * @clk_id: DAI specific clock ID
2672  * @source: Source for the clock
2673  * @freq: new clock frequency in Hz
2674  * @dir: new clock direction - input/output.
2675  *
2676  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2677  */
2678 int snd_soc_component_set_sysclk(struct snd_soc_component *component, int clk_id,
2679                              int source, unsigned int freq, int dir)
2680 {
2681         /* will be removed */
2682         if (component->set_sysclk)
2683                 return component->set_sysclk(component, clk_id, source,
2684                                              freq, dir);
2685 
2686         if (component->driver->set_sysclk)
2687                 return component->driver->set_sysclk(component, clk_id, source,
2688                                                  freq, dir);
2689 
2690         return -ENOTSUPP;
2691 }
2692 EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2693 
2694 /**
2695  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2696  * @dai: DAI
2697  * @div_id: DAI specific clock divider ID
2698  * @div: new clock divisor.
2699  *
2700  * Configures the clock dividers. This is used to derive the best DAI bit and
2701  * frame clocks from the system or master clock. It's best to set the DAI bit
2702  * and frame clocks as low as possible to save system power.
2703  */
2704 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2705         int div_id, int div)
2706 {
2707         if (dai->driver->ops->set_clkdiv)
2708                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2709         else
2710                 return -EINVAL;
2711 }
2712 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2713 
2714 /**
2715  * snd_soc_dai_set_pll - configure DAI PLL.
2716  * @dai: DAI
2717  * @pll_id: DAI specific PLL ID
2718  * @source: DAI specific source for the PLL
2719  * @freq_in: PLL input clock frequency in Hz
2720  * @freq_out: requested PLL output clock frequency in Hz
2721  *
2722  * Configures and enables PLL to generate output clock based on input clock.
2723  */
2724 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2725         unsigned int freq_in, unsigned int freq_out)
2726 {
2727         if (dai->driver->ops->set_pll)
2728                 return dai->driver->ops->set_pll(dai, pll_id, source,
2729                                          freq_in, freq_out);
2730 
2731         return snd_soc_component_set_pll(dai->component, pll_id, source,
2732                                          freq_in, freq_out);
2733 }
2734 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2735 
2736 /*
2737  * snd_soc_codec_set_pll - configure codec PLL.
2738  * @codec: CODEC
2739  * @pll_id: DAI specific PLL ID
2740  * @source: DAI specific source for the PLL
2741  * @freq_in: PLL input clock frequency in Hz
2742  * @freq_out: requested PLL output clock frequency in Hz
2743  *
2744  * Configures and enables PLL to generate output clock based on input clock.
2745  */
2746 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2747                           unsigned int freq_in, unsigned int freq_out)
2748 {
2749         if (codec->driver->set_pll)
2750                 return codec->driver->set_pll(codec, pll_id, source,
2751                                               freq_in, freq_out);
2752         else
2753                 return -EINVAL;
2754 }
2755 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2756 
2757 /*
2758  * snd_soc_component_set_pll - configure component PLL.
2759  * @component: COMPONENT
2760  * @pll_id: DAI specific PLL ID
2761  * @source: DAI specific source for the PLL
2762  * @freq_in: PLL input clock frequency in Hz
2763  * @freq_out: requested PLL output clock frequency in Hz
2764  *
2765  * Configures and enables PLL to generate output clock based on input clock.
2766  */
2767 int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2768                               int source, unsigned int freq_in,
2769                               unsigned int freq_out)
2770 {
2771         /* will be removed */
2772         if (component->set_pll)
2773                 return component->set_pll(component, pll_id, source,
2774                                               freq_in, freq_out);
2775 
2776         if (component->driver->set_pll)
2777                 return component->driver->set_pll(component, pll_id, source,
2778                                               freq_in, freq_out);
2779 
2780         return -EINVAL;
2781 }
2782 EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2783 
2784 /**
2785  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2786  * @dai: DAI
2787  * @ratio: Ratio of BCLK to Sample rate.
2788  *
2789  * Configures the DAI for a preset BCLK to sample rate ratio.
2790  */
2791 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2792 {
2793         if (dai->driver->ops->set_bclk_ratio)
2794                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2795         else
2796                 return -EINVAL;
2797 }
2798 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2799 
2800 /**
2801  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2802  * @dai: DAI
2803  * @fmt: SND_SOC_DAIFMT_* format value.
2804  *
2805  * Configures the DAI hardware format and clocking.
2806  */
2807 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2808 {
2809         if (dai->driver == NULL)
2810                 return -EINVAL;
2811         if (dai->driver->ops->set_fmt == NULL)
2812                 return -ENOTSUPP;
2813         return dai->driver->ops->set_fmt(dai, fmt);
2814 }
2815 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2816 
2817 /**
2818  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2819  * @slots: Number of slots in use.
2820  * @tx_mask: bitmask representing active TX slots.
2821  * @rx_mask: bitmask representing active RX slots.
2822  *
2823  * Generates the TDM tx and rx slot default masks for DAI.
2824  */
2825 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2826                                           unsigned int *tx_mask,
2827                                           unsigned int *rx_mask)
2828 {
2829         if (*tx_mask || *rx_mask)
2830                 return 0;
2831 
2832         if (!slots)
2833                 return -EINVAL;
2834 
2835         *tx_mask = (1 << slots) - 1;
2836         *rx_mask = (1 << slots) - 1;
2837 
2838         return 0;
2839 }
2840 
2841 /**
2842  * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2843  * @dai: The DAI to configure
2844  * @tx_mask: bitmask representing active TX slots.
2845  * @rx_mask: bitmask representing active RX slots.
2846  * @slots: Number of slots in use.
2847  * @slot_width: Width in bits for each slot.
2848  *
2849  * This function configures the specified DAI for TDM operation. @slot contains
2850  * the total number of slots of the TDM stream and @slot_with the width of each
2851  * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2852  * active slots of the TDM stream for the specified DAI, i.e. which slots the
2853  * DAI should write to or read from. If a bit is set the corresponding slot is
2854  * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2855  * the first slot, bit 1 to the second slot and so on. The first active slot
2856  * maps to the first channel of the DAI, the second active slot to the second
2857  * channel and so on.
2858  *
2859  * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2860  * @rx_mask and @slot_width will be ignored.
2861  *
2862  * Returns 0 on success, a negative error code otherwise.
2863  */
2864 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2865         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2866 {
2867         if (dai->driver->ops->xlate_tdm_slot_mask)
2868                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2869                                                 &tx_mask, &rx_mask);
2870         else
2871                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2872 
2873         dai->tx_mask = tx_mask;
2874         dai->rx_mask = rx_mask;
2875 
2876         if (dai->driver->ops->set_tdm_slot)
2877                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2878                                 slots, slot_width);
2879         else
2880                 return -ENOTSUPP;
2881 }
2882 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2883 
2884 /**
2885  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2886  * @dai: DAI
2887  * @tx_num: how many TX channels
2888  * @tx_slot: pointer to an array which imply the TX slot number channel
2889  *           0~num-1 uses
2890  * @rx_num: how many RX channels
2891  * @rx_slot: pointer to an array which imply the RX slot number channel
2892  *           0~num-1 uses
2893  *
2894  * configure the relationship between channel number and TDM slot number.
2895  */
2896 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2897         unsigned int tx_num, unsigned int *tx_slot,
2898         unsigned int rx_num, unsigned int *rx_slot)
2899 {
2900         if (dai->driver->ops->set_channel_map)
2901                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2902                         rx_num, rx_slot);
2903         else
2904                 return -EINVAL;
2905 }
2906 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2907 
2908 /**
2909  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2910  * @dai: DAI
2911  * @tristate: tristate enable
2912  *
2913  * Tristates the DAI so that others can use it.
2914  */
2915 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2916 {
2917         if (dai->driver->ops->set_tristate)
2918                 return dai->driver->ops->set_tristate(dai, tristate);
2919         else
2920                 return -EINVAL;
2921 }
2922 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2923 
2924 /**
2925  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2926  * @dai: DAI
2927  * @mute: mute enable
2928  * @direction: stream to mute
2929  *
2930  * Mutes the DAI DAC.
2931  */
2932 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2933                              int direction)
2934 {
2935         if (!dai->driver)
2936                 return -ENOTSUPP;
2937 
2938         if (dai->driver->ops->mute_stream)
2939                 return dai->driver->ops->mute_stream(dai, mute, direction);
2940         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2941                  dai->driver->ops->digital_mute)
2942                 return dai->driver->ops->digital_mute(dai, mute);
2943         else
2944                 return -ENOTSUPP;
2945 }
2946 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2947 
2948 /**
2949  * snd_soc_register_card - Register a card with the ASoC core
2950  *
2951  * @card: Card to register
2952  *
2953  */
2954 int snd_soc_register_card(struct snd_soc_card *card)
2955 {
2956         int i, ret;
2957         struct snd_soc_pcm_runtime *rtd;
2958 
2959         if (!card->name || !card->dev)
2960                 return -EINVAL;
2961 
2962         for (i = 0; i < card->num_links; i++) {
2963                 struct snd_soc_dai_link *link = &card->dai_link[i];
2964 
2965                 ret = soc_init_dai_link(card, link);
2966                 if (ret) {
2967                         dev_err(card->dev, "ASoC: failed to init link %s\n",
2968                                 link->name);
2969                         return ret;
2970                 }
2971         }
2972 
2973         dev_set_drvdata(card->dev, card);
2974 
2975         snd_soc_initialize_card_lists(card);
2976 
2977         INIT_LIST_HEAD(&card->dai_link_list);
2978         card->num_dai_links = 0;
2979 
2980         INIT_LIST_HEAD(&card->rtd_list);
2981         card->num_rtd = 0;
2982 
2983         INIT_LIST_HEAD(&card->dapm_dirty);
2984         INIT_LIST_HEAD(&card->dobj_list);
2985         card->instantiated = 0;
2986         mutex_init(&card->mutex);
2987         mutex_init(&card->dapm_mutex);
2988 
2989         ret = snd_soc_instantiate_card(card);
2990         if (ret != 0)
2991                 return ret;
2992 
2993         /* deactivate pins to sleep state */
2994         list_for_each_entry(rtd, &card->rtd_list, list)  {
2995                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2996                 int j;
2997 
2998                 for (j = 0; j < rtd->num_codecs; j++) {
2999                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
3000                         if (!codec_dai->active)
3001                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
3002                 }
3003 
3004                 if (!cpu_dai->active)
3005                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
3006         }
3007 
3008         return ret;
3009 }
3010 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3011 
3012 /**
3013  * snd_soc_unregister_card - Unregister a card with the ASoC core
3014  *
3015  * @card: Card to unregister
3016  *
3017  */
3018 int snd_soc_unregister_card(struct snd_soc_card *card)
3019 {
3020         if (card->instantiated) {
3021                 card->instantiated = false;
3022                 snd_soc_dapm_shutdown(card);
3023                 soc_cleanup_card_resources(card);
3024                 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3025         }
3026 
3027         return 0;
3028 }
3029 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3030 
3031 /*
3032  * Simplify DAI link configuration by removing ".-1" from device names
3033  * and sanitizing names.
3034  */
3035 static char *fmt_single_name(struct device *dev, int *id)
3036 {
3037         char *found, name[NAME_SIZE];
3038         int id1, id2;
3039 
3040         if (dev_name(dev) == NULL)
3041                 return NULL;
3042 
3043         strlcpy(name, dev_name(dev), NAME_SIZE);
3044 
3045         /* are we a "%s.%d" name (platform and SPI components) */
3046         found = strstr(name, dev->driver->name);
3047         if (found) {
3048                 /* get ID */
3049                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3050 
3051                         /* discard ID from name if ID == -1 */
3052                         if (*id == -1)
3053                                 found[strlen(dev->driver->name)] = '\0';
3054                 }
3055 
3056         } else {
3057                 /* I2C component devices are named "bus-addr"  */
3058                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3059                         char tmp[NAME_SIZE];
3060 
3061                         /* create unique ID number from I2C addr and bus */
3062                         *id = ((id1 & 0xffff) << 16) + id2;
3063 
3064                         /* sanitize component name for DAI link creation */
3065                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3066                         strlcpy(name, tmp, NAME_SIZE);
3067                 } else
3068                         *id = 0;
3069         }
3070 
3071         return kstrdup(name, GFP_KERNEL);
3072 }
3073 
3074 /*
3075  * Simplify DAI link naming for single devices with multiple DAIs by removing
3076  * any ".-1" and using the DAI name (instead of device name).
3077  */
3078 static inline char *fmt_multiple_name(struct device *dev,
3079                 struct snd_soc_dai_driver *dai_drv)
3080 {
3081         if (dai_drv->name == NULL) {
3082                 dev_err(dev,
3083                         "ASoC: error - multiple DAI %s registered with no name\n",
3084                         dev_name(dev));
3085                 return NULL;
3086         }
3087 
3088         return kstrdup(dai_drv->name, GFP_KERNEL);
3089 }
3090 
3091 /**
3092  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
3093  *
3094  * @component: The component for which the DAIs should be unregistered
3095  */
3096 static void snd_soc_unregister_dais(struct snd_soc_component *component)
3097 {
3098         struct snd_soc_dai *dai, *_dai;
3099 
3100         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
3101                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
3102                         dai->name);
3103                 list_del(&dai->list);
3104                 kfree(dai->name);
3105                 kfree(dai);
3106         }
3107 }
3108 
3109 /* Create a DAI and add it to the component's DAI list */
3110 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
3111         struct snd_soc_dai_driver *dai_drv,
3112         bool legacy_dai_naming)
3113 {
3114         struct device *dev = component->dev;
3115         struct snd_soc_dai *dai;
3116 
3117         dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
3118 
3119         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3120         if (dai == NULL)
3121                 return NULL;
3122 
3123         /*
3124          * Back in the old days when we still had component-less DAIs,
3125          * instead of having a static name, component-less DAIs would
3126          * inherit the name of the parent device so it is possible to
3127          * register multiple instances of the DAI. We still need to keep
3128          * the same naming style even though those DAIs are not
3129          * component-less anymore.
3130          */
3131         if (legacy_dai_naming &&
3132            (dai_drv->id == 0 || dai_drv->name == NULL)) {
3133                 dai->name = fmt_single_name(dev, &dai->id);
3134         } else {
3135                 dai->name = fmt_multiple_name(dev, dai_drv);
3136                 if (dai_drv->id)
3137                         dai->id = dai_drv->id;
3138                 else
3139                         dai->id = component->num_dai;
3140         }
3141         if (dai->name == NULL) {
3142                 kfree(dai);
3143                 return NULL;
3144         }
3145 
3146         dai->component = component;
3147         dai->dev = dev;
3148         dai->driver = dai_drv;
3149         if (!dai->driver->ops)
3150                 dai->driver->ops = &null_dai_ops;
3151 
3152         list_add(&dai->list, &component->dai_list);
3153         component->num_dai++;
3154 
3155         dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3156         return dai;
3157 }
3158 
3159 /**
3160  * snd_soc_register_dais - Register a DAI with the ASoC core
3161  *
3162  * @component: The component the DAIs are registered for
3163  * @dai_drv: DAI driver to use for the DAIs
3164  * @count: Number of DAIs
3165  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3166  *                     parent's name.
3167  */
3168 static int snd_soc_register_dais(struct snd_soc_component *component,
3169         struct snd_soc_dai_driver *dai_drv, size_t count,
3170         bool legacy_dai_naming)
3171 {
3172         struct device *dev = component->dev;
3173         struct snd_soc_dai *dai;
3174         unsigned int i;
3175         int ret;
3176 
3177         dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
3178 
3179         component->dai_drv = dai_drv;
3180 
3181         for (i = 0; i < count; i++) {
3182 
3183                 dai = soc_add_dai(component, dai_drv + i,
3184                                 count == 1 && legacy_dai_naming);
3185                 if (dai == NULL) {
3186                         ret = -ENOMEM;
3187                         goto err;
3188                 }
3189         }
3190 
3191         return 0;
3192 
3193 err:
3194         snd_soc_unregister_dais(component);
3195 
3196         return ret;
3197 }
3198 
3199 /**
3200  * snd_soc_register_dai - Register a DAI dynamically & create its widgets
3201  *
3202  * @component: The component the DAIs are registered for
3203  * @dai_drv: DAI driver to use for the DAI
3204  *
3205  * Topology can use this API to register DAIs when probing a component.
3206  * These DAIs's widgets will be freed in the card cleanup and the DAIs
3207  * will be freed in the component cleanup.
3208  */
3209 int snd_soc_register_dai(struct snd_soc_component *component,
3210         struct snd_soc_dai_driver *dai_drv)
3211 {
3212         struct snd_soc_dapm_context *dapm =
3213                 snd_soc_component_get_dapm(component);
3214         struct snd_soc_dai *dai;
3215         int ret;
3216 
3217         if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
3218                 dev_err(component->dev, "Invalid dai type %d\n",
3219                         dai_drv->dobj.type);
3220                 return -EINVAL;
3221         }
3222 
3223         lockdep_assert_held(&client_mutex);
3224         dai = soc_add_dai(component, dai_drv, false);
3225         if (!dai)
3226                 return -ENOMEM;
3227 
3228         /* Create the DAI widgets here. After adding DAIs, topology may
3229          * also add routes that need these widgets as source or sink.
3230          */
3231         ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
3232         if (ret != 0) {
3233                 dev_err(component->dev,
3234                         "Failed to create DAI widgets %d\n", ret);
3235         }
3236 
3237         return ret;
3238 }
3239 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3240 
3241 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
3242         enum snd_soc_dapm_type type, int subseq)
3243 {
3244         struct snd_soc_component *component = dapm->component;
3245 
3246         component->driver->seq_notifier(component, type, subseq);
3247 }
3248 
3249 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3250         int event)
3251 {
3252         struct snd_soc_component *component = dapm->component;
3253 
3254         return component->driver->stream_event(component, event);
3255 }
3256 
3257 static int snd_soc_component_drv_pcm_new(struct snd_soc_component *component,
3258                                         struct snd_soc_pcm_runtime *rtd)
3259 {
3260         if (component->driver->pcm_new)
3261                 return component->driver->pcm_new(rtd);
3262 
3263         return 0;
3264 }
3265 
3266 static void snd_soc_component_drv_pcm_free(struct snd_soc_component *component,
3267                                           struct snd_pcm *pcm)
3268 {
3269         if (component->driver->pcm_free)
3270                 component->driver->pcm_free(pcm);
3271 }
3272 
3273 static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3274                                         enum snd_soc_bias_level level)
3275 {
3276         struct snd_soc_component *component = dapm->component;
3277 
3278         return component->driver->set_bias_level(component, level);
3279 }
3280 
3281 static int snd_soc_component_initialize(struct snd_soc_component *component,
3282         const struct snd_soc_component_driver *driver, struct device *dev)
3283 {
3284         struct snd_soc_dapm_context *dapm;
3285 
3286         component->name = fmt_single_name(dev, &component->id);
3287         if (!component->name) {
3288                 dev_err(dev, "ASoC: Failed to allocate name\n");
3289                 return -ENOMEM;
3290         }
3291 
3292         component->dev = dev;
3293         component->driver = driver;
3294         component->probe = component->driver->probe;
3295         component->remove = component->driver->remove;
3296         component->suspend = component->driver->suspend;
3297         component->resume = component->driver->resume;
3298         component->set_sysclk = component->driver->set_sysclk;
3299         component->set_pll = component->driver->set_pll;
3300         component->set_jack = component->driver->set_jack;
3301         component->pcm_new = snd_soc_component_drv_pcm_new;
3302         component->pcm_free = snd_soc_component_drv_pcm_free;
3303 
3304         dapm = snd_soc_component_get_dapm(component);
3305         dapm->dev = dev;
3306         dapm->component = component;
3307         dapm->bias_level = SND_SOC_BIAS_OFF;
3308         dapm->idle_bias_off = !driver->idle_bias_on;
3309         dapm->suspend_bias_off = driver->suspend_bias_off;
3310         if (driver->seq_notifier)
3311                 dapm->seq_notifier = snd_soc_component_seq_notifier;
3312         if (driver->stream_event)
3313                 dapm->stream_event = snd_soc_component_stream_event;
3314         if (driver->set_bias_level)
3315                 dapm->set_bias_level = snd_soc_component_set_bias_level;
3316 
3317         INIT_LIST_HEAD(&component->dai_list);
3318         mutex_init(&component->io_mutex);
3319 
3320         return 0;
3321 }
3322 
3323 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3324 {
3325         int val_bytes = regmap_get_val_bytes(component->regmap);
3326 
3327         /* Errors are legitimate for non-integer byte multiples */
3328         if (val_bytes > 0)
3329                 component->val_bytes = val_bytes;
3330 }
3331 
3332 #ifdef CONFIG_REGMAP
3333 
3334 /**
3335  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3336  * @component: The component for which to initialize the regmap instance
3337  * @regmap: The regmap instance that should be used by the component
3338  *
3339  * This function allows deferred assignment of the regmap instance that is
3340  * associated with the component. Only use this if the regmap instance is not
3341  * yet ready when the component is registered. The function must also be called
3342  * before the first IO attempt of the component.
3343  */
3344 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3345         struct regmap *regmap)
3346 {
3347         component->regmap = regmap;
3348         snd_soc_component_setup_regmap(component);
3349 }
3350 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3351 
3352 /**
3353  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3354  * @component: The component for which to de-initialize the regmap instance
3355  *
3356  * Calls regmap_exit() on the regmap instance associated to the component and
3357  * removes the regmap instance from the component.
3358  *
3359  * This function should only be used if snd_soc_component_init_regmap() was used
3360  * to initialize the regmap instance.
3361  */
3362 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3363 {
3364         regmap_exit(component->regmap);
3365         component->regmap = NULL;
3366 }
3367 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3368 
3369 #endif
3370 
3371 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3372 {
3373         if (!component->write && !component->read) {
3374                 if (!component->regmap)
3375                         component->regmap = dev_get_regmap(component->dev, NULL);
3376                 if (component->regmap)
3377                         snd_soc_component_setup_regmap(component);
3378         }
3379 
3380         list_add(&component->list, &component_list);
3381         INIT_LIST_HEAD(&component->dobj_list);
3382 }
3383 
3384 static void snd_soc_component_add(struct snd_soc_component *component)
3385 {
3386         mutex_lock(&client_mutex);
3387         snd_soc_component_add_unlocked(component);
3388         mutex_unlock(&client_mutex);
3389 }
3390 
3391 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3392 {
3393         snd_soc_unregister_dais(component);
3394         kfree(component->name);
3395 }
3396 
3397 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3398 {
3399         struct snd_soc_card *card = component->card;
3400 
3401         if (card)
3402                 snd_soc_unregister_card(card);
3403 
3404         list_del(&component->list);
3405 }
3406 
3407 #define ENDIANNESS_MAP(name) \
3408         (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3409 static u64 endianness_format_map[] = {
3410         ENDIANNESS_MAP(S16_),
3411         ENDIANNESS_MAP(U16_),
3412         ENDIANNESS_MAP(S24_),
3413         ENDIANNESS_MAP(U24_),
3414         ENDIANNESS_MAP(S32_),
3415         ENDIANNESS_MAP(U32_),
3416         ENDIANNESS_MAP(S24_3),
3417         ENDIANNESS_MAP(U24_3),
3418         ENDIANNESS_MAP(S20_3),
3419         ENDIANNESS_MAP(U20_3),
3420         ENDIANNESS_MAP(S18_3),
3421         ENDIANNESS_MAP(U18_3),
3422         ENDIANNESS_MAP(FLOAT_),
3423         ENDIANNESS_MAP(FLOAT64_),
3424         ENDIANNESS_MAP(IEC958_SUBFRAME_),
3425 };
3426 
3427 /*
3428  * Fix up the DAI formats for endianness: codecs don't actually see
3429  * the endianness of the data but we're using the CPU format
3430  * definitions which do need to include endianness so we ensure that
3431  * codec DAIs always have both big and little endian variants set.
3432  */
3433 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3434 {
3435         int i;
3436 
3437         for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3438                 if (stream->formats & endianness_format_map[i])
3439                         stream->formats |= endianness_format_map[i];
3440 }
3441 
3442 int snd_soc_add_component(struct device *dev,
3443                         struct snd_soc_component *component,
3444                         const struct snd_soc_component_driver *component_driver,
3445                         struct snd_soc_dai_driver *dai_drv,
3446                         int num_dai)
3447 {
3448         int ret;
3449         int i;
3450 
3451         ret = snd_soc_component_initialize(component, component_driver, dev);
3452         if (ret)
3453                 goto err_free;
3454 
3455         component->ignore_pmdown_time = true;
3456         component->registered_as_component = true;
3457 
3458         if (component_driver->endianness) {
3459                 for (i = 0; i < num_dai; i++) {
3460                         convert_endianness_formats(&dai_drv[i].playback);
3461                         convert_endianness_formats(&dai_drv[i].capture);
3462                 }
3463         }
3464 
3465         ret = snd_soc_register_dais(component, dai_drv, num_dai,
3466                                     !component_driver->non_legacy_dai_naming);
3467         if (ret < 0) {
3468                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3469                 goto err_cleanup;
3470         }
3471 
3472         snd_soc_component_add(component);
3473 
3474         return 0;
3475 
3476 err_cleanup:
3477         snd_soc_component_cleanup(component);
3478 err_free:
3479         kfree(component);
3480         return ret;
3481 }
3482 EXPORT_SYMBOL_GPL(snd_soc_add_component);
3483 
3484 int snd_soc_register_component(struct device *dev,
3485                         const struct snd_soc_component_driver *component_driver,
3486                         struct snd_soc_dai_driver *dai_drv,
3487                         int num_dai)
3488 {
3489         struct snd_soc_component *component;
3490 
3491         component = kzalloc(sizeof(*component), GFP_KERNEL);
3492         if (!component)
3493                 return -ENOMEM;
3494 
3495         return snd_soc_add_component(dev, component, component_driver,
3496                                      dai_drv, num_dai);
3497 }
3498 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3499 
3500 /**
3501  * snd_soc_unregister_component - Unregister all related component
3502  * from the ASoC core
3503  *
3504  * @dev: The device to unregister
3505  */
3506 static int __snd_soc_unregister_component(struct device *dev)
3507 {
3508         struct snd_soc_component *component;
3509         int found = 0;
3510 
3511         mutex_lock(&client_mutex);
3512         list_for_each_entry(component, &component_list, list) {
3513                 if (dev != component->dev ||
3514                     !component->registered_as_component)
3515                         continue;
3516 
3517                 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL);
3518                 snd_soc_component_del_unlocked(component);
3519                 found = 1;
3520                 break;
3521         }
3522         mutex_unlock(&client_mutex);
3523 
3524         if (found) {
3525                 snd_soc_component_cleanup(component);
3526                 kfree(component);
3527         }
3528 
3529         return found;
3530 }
3531 
3532 void snd_soc_unregister_component(struct device *dev)
3533 {
3534         while (__snd_soc_unregister_component(dev));
3535 }
3536 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3537 
3538 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
3539                                                    const char *driver_name)
3540 {
3541         struct snd_soc_component *component;
3542         struct snd_soc_component *ret;
3543 
3544         ret = NULL;
3545         mutex_lock(&client_mutex);
3546         list_for_each_entry(component, &component_list, list) {
3547                 if (dev != component->dev)
3548                         continue;
3549 
3550                 if (driver_name &&
3551                     (driver_name != component->driver->name) &&
3552                     (strcmp(component->driver->name, driver_name) != 0))
3553                         continue;
3554 
3555                 ret = component;
3556                 break;
3557         }
3558         mutex_unlock(&client_mutex);
3559 
3560         return ret;
3561 }
3562 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
3563 
3564 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3565 {
3566         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3567 
3568         return platform->driver->probe(platform);
3569 }
3570 
3571 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3572 {
3573         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3574 
3575         platform->driver->remove(platform);
3576 }
3577 
3578 static int snd_soc_platform_drv_pcm_new(struct snd_soc_component *component,
3579                                         struct snd_soc_pcm_runtime *rtd)
3580 {
3581         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3582 
3583         if (platform->driver->pcm_new)
3584                 return platform->driver->pcm_new(rtd);
3585 
3586         return 0;
3587 }
3588 
3589 static void snd_soc_platform_drv_pcm_free(struct snd_soc_component *component,
3590                                           struct snd_pcm *pcm)
3591 {
3592         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3593 
3594         if (platform->driver->pcm_free)
3595                 platform->driver->pcm_free(pcm);
3596 }
3597 
3598 /**
3599  * snd_soc_add_platform - Add a platform to the ASoC core
3600  * @dev: The parent device for the platform
3601  * @platform: The platform to add
3602  * @platform_drv: The driver for the platform
3603  */
3604 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3605                 const struct snd_soc_platform_driver *platform_drv)
3606 {
3607         int ret;
3608 
3609         ret = snd_soc_component_initialize(&platform->component,
3610                         &platform_drv->component_driver, dev);
3611         if (ret)
3612                 return ret;
3613 
3614         platform->dev = dev;
3615         platform->driver = platform_drv;
3616 
3617         if (platform_drv->probe)
3618                 platform->component.probe = snd_soc_platform_drv_probe;
3619         if (platform_drv->remove)
3620                 platform->component.remove = snd_soc_platform_drv_remove;
3621         if (platform_drv->pcm_new)
3622                 platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
3623         if (platform_drv->pcm_free)
3624                 platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
3625 
3626 #ifdef CONFIG_DEBUG_FS
3627         platform->component.debugfs_prefix = "platform";
3628 #endif
3629 
3630         mutex_lock(&client_mutex);
3631         snd_soc_component_add_unlocked(&platform->component);
3632         list_add(&platform->list, &platform_list);
3633         mutex_unlock(&client_mutex);
3634 
3635         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3636                 platform->component.name);
3637 
3638         return 0;
3639 }
3640 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3641 
3642 /**
3643  * snd_soc_register_platform - Register a platform with the ASoC core
3644  *
3645  * @dev: The device for the platform
3646  * @platform_drv: The driver for the platform
3647  */
3648 int snd_soc_register_platform(struct device *dev,
3649                 const struct snd_soc_platform_driver *platform_drv)
3650 {
3651         struct snd_soc_platform *platform;
3652         int ret;
3653 
3654         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3655 
3656         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3657         if (platform == NULL)
3658                 return -ENOMEM;
3659 
3660         ret = snd_soc_add_platform(dev, platform, platform_drv);
3661         if (ret)
3662                 kfree(platform);
3663 
3664         return ret;
3665 }
3666 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3667 
3668 /**
3669  * snd_soc_remove_platform - Remove a platform from the ASoC core
3670  * @platform: the platform to remove
3671  */
3672 void snd_soc_remove_platform(struct snd_soc_platform *platform)
3673 {
3674 
3675         mutex_lock(&client_mutex);
3676         list_del(&platform->list);
3677         snd_soc_component_del_unlocked(&platform->component);
3678         mutex_unlock(&client_mutex);
3679 
3680         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3681                 platform->component.name);
3682 
3683         snd_soc_component_cleanup(&platform->component);
3684 }
3685 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3686 
3687 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3688 {
3689         struct snd_soc_platform *platform;
3690 
3691         mutex_lock(&client_mutex);
3692         list_for_each_entry(platform, &platform_list, list) {
3693                 if (dev == platform->dev) {
3694                         mutex_unlock(&client_mutex);
3695                         return platform;
3696                 }
3697         }
3698         mutex_unlock(&client_mutex);
3699 
3700         return NULL;
3701 }
3702 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3703 
3704 /**
3705  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3706  *
3707  * @dev: platform to unregister
3708  */
3709 void snd_soc_unregister_platform(struct device *dev)
3710 {
3711         struct snd_soc_platform *platform;
3712 
3713         platform = snd_soc_lookup_platform(dev);
3714         if (!platform)
3715                 return;
3716 
3717         snd_soc_remove_platform(platform);
3718         kfree(platform);
3719 }
3720 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3721 
3722 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3723 {
3724         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3725 
3726         return codec->driver->probe(codec);
3727 }
3728 
3729 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3730 {
3731         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3732 
3733         codec->driver->remove(codec);
3734 }
3735 
3736 static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3737 {
3738         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3739 
3740         return codec->driver->suspend(codec);
3741 }
3742 
3743 static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3744 {
3745         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3746 
3747         return codec->driver->resume(codec);
3748 }
3749 
3750 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3751         unsigned int reg, unsigned int val)
3752 {
3753         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3754 
3755         return codec->driver->write(codec, reg, val);
3756 }
3757 
3758 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3759         unsigned int reg, unsigned int *val)
3760 {
3761         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3762 
3763         *val = codec->driver->read(codec, reg);
3764 
3765         return 0;
3766 }
3767 
3768 static int snd_soc_codec_set_sysclk_(struct snd_soc_component *component,
3769                           int clk_id, int source, unsigned int freq, int dir)
3770 {
3771         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3772 
3773         return snd_soc_codec_set_sysclk(codec, clk_id, source, freq, dir);
3774 }
3775 
3776 static int snd_soc_codec_set_pll_(struct snd_soc_component *component,
3777                                   int pll_id, int source, unsigned int freq_in,
3778                                   unsigned int freq_out)
3779 {
3780         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3781 
3782         return snd_soc_codec_set_pll(codec, pll_id, source, freq_in, freq_out);
3783 }
3784 
3785 static int snd_soc_codec_set_jack_(struct snd_soc_component *component,
3786                                struct snd_soc_jack *jack, void *data)
3787 {
3788         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3789 
3790         return snd_soc_codec_set_jack(codec, jack, data);
3791 }
3792 
3793 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3794         enum snd_soc_bias_level level)
3795 {
3796         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3797 
3798         return codec->driver->set_bias_level(codec, level);
3799 }
3800 
3801 /**
3802  * snd_soc_register_codec - Register a codec with the ASoC core
3803  *
3804  * @dev: The parent device for this codec
3805  * @codec_drv: Codec driver
3806  * @dai_drv: The associated DAI driver
3807  * @num_dai: Number of DAIs
3808  */
3809 int snd_soc_register_codec(struct device *dev,
3810                            const struct snd_soc_codec_driver *codec_drv,
3811                            struct snd_soc_dai_driver *dai_drv,
3812                            int num_dai)
3813 {
3814         struct snd_soc_dapm_context *dapm;
3815         struct snd_soc_codec *codec;
3816         struct snd_soc_dai *dai;
3817         int ret, i;
3818 
3819         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3820 
3821         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3822         if (codec == NULL)
3823                 return -ENOMEM;
3824 
3825         codec->component.codec = codec;
3826 
3827         ret = snd_soc_component_initialize(&codec->component,
3828                         &codec_drv->component_driver, dev);
3829         if (ret)
3830                 goto err_free;
3831 
3832         if (codec_drv->probe)
3833                 codec->component.probe = snd_soc_codec_drv_probe;
3834         if (codec_drv->remove)
3835                 codec->component.remove = snd_soc_codec_drv_remove;
3836         if (codec_drv->suspend)
3837                 codec->component.suspend = snd_soc_codec_drv_suspend;
3838         if (codec_drv->resume)
3839                 codec->component.resume = snd_soc_codec_drv_resume;
3840         if (codec_drv->write)
3841                 codec->component.write = snd_soc_codec_drv_write;
3842         if (codec_drv->read)
3843                 codec->component.read = snd_soc_codec_drv_read;
3844         if (codec_drv->set_sysclk)
3845                 codec->component.set_sysclk = snd_soc_codec_set_sysclk_;
3846         if (codec_drv->set_pll)
3847                 codec->component.set_pll = snd_soc_codec_set_pll_;
3848         if (codec_drv->set_jack)
3849                 codec->component.set_jack = snd_soc_codec_set_jack_;
3850         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3851 
3852         dapm = snd_soc_codec_get_dapm(codec);
3853         dapm->idle_bias_off = codec_drv->idle_bias_off;
3854         dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3855         if (codec_drv->seq_notifier)
3856                 dapm->seq_notifier = codec_drv->seq_notifier;
3857         if (codec_drv->set_bias_level)
3858                 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3859         codec->dev = dev;
3860         codec->driver = codec_drv;
3861         codec->component.val_bytes = codec_drv->reg_word_size;
3862 
3863 #ifdef CONFIG_DEBUG_FS
3864         codec->component.init_debugfs = soc_init_codec_debugfs;
3865         codec->component.debugfs_prefix = "codec";
3866 #endif
3867 
3868         if (codec_drv->get_regmap)
3869                 codec->component.regmap = codec_drv->get_regmap(dev);
3870 
3871         for (i = 0; i < num_dai; i++) {
3872                 convert_endianness_formats(&dai_drv[i].playback);
3873                 convert_endianness_formats(&dai_drv[i].capture);
3874         }
3875 
3876         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3877         if (ret < 0) {
3878                 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3879                 goto err_cleanup;
3880         }
3881 
3882         list_for_each_entry(dai, &codec->component.dai_list, list)
3883                 dai->codec = codec;
3884 
3885         mutex_lock(&client_mutex);
3886         snd_soc_component_add_unlocked(&codec->component);
3887         list_add(&codec->list, &codec_list);
3888         mutex_unlock(&client_mutex);
3889 
3890         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3891                 codec->component.name);
3892         return 0;
3893 
3894 err_cleanup:
3895         snd_soc_component_cleanup(&codec->component);
3896 err_free:
3897         kfree(codec);
3898         return ret;
3899 }
3900 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3901 
3902 /**
3903  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3904  *
3905  * @dev: codec to unregister
3906  */
3907 void snd_soc_unregister_codec(struct device *dev)
3908 {
3909         struct snd_soc_codec *codec;
3910 
3911         mutex_lock(&client_mutex);
3912         list_for_each_entry(codec, &codec_list, list) {
3913                 if (dev == codec->dev)
3914                         goto found;
3915         }
3916         mutex_unlock(&client_mutex);
3917         return;
3918 
3919 found:
3920         list_del(&codec->list);
3921         snd_soc_component_del_unlocked(&codec->component);
3922         mutex_unlock(&client_mutex);
3923 
3924         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3925                         codec->component.name);
3926 
3927         snd_soc_component_cleanup(&codec->component);
3928         snd_soc_cache_exit(codec);
3929         kfree(codec);
3930 }
3931 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3932 
3933 /* Retrieve a card's name from device tree */
3934 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3935                                const char *propname)
3936 {
3937         struct device_node *np;
3938         int ret;
3939 
3940         if (!card->dev) {
3941                 pr_err("card->dev is not set before calling %s\n", __func__);
3942                 return -EINVAL;
3943         }
3944 
3945         np = card->dev->of_node;
3946 
3947         ret = of_property_read_string_index(np, propname, 0, &card->name);
3948         /*
3949          * EINVAL means the property does not exist. This is fine providing
3950          * card->name was previously set, which is checked later in
3951          * snd_soc_register_card.
3952          */
3953         if (ret < 0 && ret != -EINVAL) {
3954                 dev_err(card->dev,
3955                         "ASoC: Property '%s' could not be read: %d\n",
3956                         propname, ret);
3957                 return ret;
3958         }
3959 
3960         return 0;
3961 }
3962 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3963 
3964 static const struct snd_soc_dapm_widget simple_widgets[] = {
3965         SND_SOC_DAPM_MIC("Microphone", NULL),
3966         SND_SOC_DAPM_LINE("Line", NULL),
3967         SND_SOC_DAPM_HP("Headphone", NULL),
3968         SND_SOC_DAPM_SPK("Speaker", NULL),
3969 };
3970 
3971 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3972                                           const char *propname)
3973 {
3974         struct device_node *np = card->dev->of_node;
3975         struct snd_soc_dapm_widget *widgets;
3976         const char *template, *wname;
3977         int i, j, num_widgets, ret;
3978 
3979         num_widgets = of_property_count_strings(np, propname);
3980         if (num_widgets < 0) {
3981                 dev_err(card->dev,
3982                         "ASoC: Property '%s' does not exist\n", propname);
3983                 return -EINVAL;
3984         }
3985         if (num_widgets & 1) {
3986                 dev_err(card->dev,
3987                         "ASoC: Property '%s' length is not even\n", propname);
3988                 return -EINVAL;
3989         }
3990 
3991         num_widgets /= 2;
3992         if (!num_widgets) {
3993                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3994                         propname);
3995                 return -EINVAL;
3996         }
3997 
3998         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3999                                GFP_KERNEL);
4000         if (!widgets) {
4001                 dev_err(card->dev,
4002                         "ASoC: Could not allocate memory for widgets\n");
4003                 return -ENOMEM;
4004         }
4005 
4006         for (i = 0; i < num_widgets; i++) {
4007                 ret = of_property_read_string_index(np, propname,
4008                         2 * i, &template);
4009                 if (ret) {
4010                         dev_err(card->dev,
4011                                 "ASoC: Property '%s' index %d read error:%d\n",
4012                                 propname, 2 * i, ret);
4013                         return -EINVAL;
4014                 }
4015 
4016                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
4017                         if (!strncmp(template, simple_widgets[j].name,
4018                                      strlen(simple_widgets[j].name))) {
4019                                 widgets[i] = simple_widgets[j];
4020                                 break;
4021                         }
4022                 }
4023 
4024                 if (j >= ARRAY_SIZE(simple_widgets)) {
4025                         dev_err(card->dev,
4026                                 "ASoC: DAPM widget '%s' is not supported\n",
4027                                 template);
4028                         return -EINVAL;
4029                 }
4030 
4031                 ret = of_property_read_string_index(np, propname,
4032                                                     (2 * i) + 1,
4033                                                     &wname);
4034                 if (ret) {
4035                         dev_err(card->dev,
4036                                 "ASoC: Property '%s' index %d read error:%d\n",
4037                                 propname, (2 * i) + 1, ret);
4038                         return -EINVAL;
4039                 }
4040 
4041                 widgets[i].name = wname;
4042         }
4043 
4044         card->of_dapm_widgets = widgets;
4045         card->num_of_dapm_widgets = num_widgets;
4046 
4047         return 0;
4048 }
4049 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
4050 
4051 static int snd_soc_of_get_slot_mask(struct device_node *np,
4052                                     const char *prop_name,
4053                                     unsigned int *mask)
4054 {
4055         u32 val;
4056         const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
4057         int i;
4058 
4059         if (!of_slot_mask)
4060                 return 0;
4061         val /= sizeof(u32);
4062         for (i = 0; i < val; i++)
4063                 if (be32_to_cpup(&of_slot_mask[i]))
4064                         *mask |= (1 << i);
4065 
4066         return val;
4067 }
4068 
4069 int snd_soc_of_parse_tdm_slot(struct device_node *np,
4070                               unsigned int *tx_mask,
4071                               unsigned int *rx_mask,
4072                               unsigned int *slots,
4073                               unsigned int *slot_width)
4074 {
4075         u32 val;
4076         int ret;
4077 
4078         if (tx_mask)
4079                 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
4080         if (rx_mask)
4081                 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
4082 
4083         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
4084                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
4085                 if (ret)
4086                         return ret;
4087 
4088                 if (slots)
4089                         *slots = val;
4090         }
4091 
4092         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
4093                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
4094                 if (ret)
4095                         return ret;
4096 
4097                 if (slot_width)
4098                         *slot_width = val;
4099         }
4100 
4101         return 0;
4102 }
4103 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
4104 
4105 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
4106                                    struct snd_soc_codec_conf *codec_conf,
4107                                    struct device_node *of_node,
4108                                    const char *propname)
4109 {
4110         struct device_node *np = card->dev->of_node;
4111         const char *str;
4112         int ret;
4113 
4114         ret = of_property_read_string(np, propname, &str);
4115         if (ret < 0) {
4116                 /* no prefix is not error */
4117                 return;
4118         }
4119 
4120         codec_conf->of_node     = of_node;
4121         codec_conf->name_prefix = str;
4122 }
4123 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
4124 
4125 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4126                                    const char *propname)
4127 {
4128         struct device_node *np = card->dev->of_node;
4129         int num_routes;
4130         struct snd_soc_dapm_route *routes;
4131         int i, ret;
4132 
4133         num_routes = of_property_count_strings(np, propname);
4134         if (num_routes < 0 || num_routes & 1) {
4135                 dev_err(card->dev,
4136                         "ASoC: Property '%s' does not exist or its length is not even\n",
4137                         propname);
4138                 return -EINVAL;
4139         }
4140         num_routes /= 2;
4141         if (!num_routes) {
4142                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4143                         propname);
4144                 return -EINVAL;
4145         }
4146 
4147         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4148                               GFP_KERNEL);
4149         if (!routes) {
4150                 dev_err(card->dev,
4151                         "ASoC: Could not allocate DAPM route table\n");
4152                 return -EINVAL;
4153         }
4154 
4155         for (i = 0; i < num_routes; i++) {
4156                 ret = of_property_read_string_index(np, propname,
4157                         2 * i, &routes[i].sink);
4158                 if (ret) {
4159                         dev_err(card->dev,
4160                                 "ASoC: Property '%s' index %d could not be read: %d\n",
4161                                 propname, 2 * i, ret);
4162                         return -EINVAL;
4163                 }
4164                 ret = of_property_read_string_index(np, propname,
4165                         (2 * i) + 1, &routes[i].source);
4166                 if (ret) {
4167                         dev_err(card->dev,
4168                                 "ASoC: Property '%s' index %d could not be read: %d\n",
4169                                 propname, (2 * i) + 1, ret);
4170                         return -EINVAL;
4171                 }
4172         }
4173 
4174         card->num_of_dapm_routes = num_routes;
4175         card->of_dapm_routes = routes;
4176 
4177         return 0;
4178 }
4179 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4180 
4181 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4182                                      const char *prefix,
4183                                      struct device_node **bitclkmaster,
4184                                      struct device_node **framemaster)
4185 {
4186         int ret, i;
4187         char prop[128];
4188         unsigned int format = 0;
4189         int bit, frame;
4190         const char *str;
4191         struct {
4192                 char *name;
4193                 unsigned int val;
4194         } of_fmt_table[] = {
4195                 { "i2s",        SND_SOC_DAIFMT_I2S },
4196                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
4197                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
4198                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
4199                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
4200                 { "ac97",       SND_SOC_DAIFMT_AC97 },
4201                 { "pdm",        SND_SOC_DAIFMT_PDM},
4202                 { "msb",        SND_SOC_DAIFMT_MSB },
4203                 { "lsb",        SND_SOC_DAIFMT_LSB },
4204         };
4205 
4206         if (!prefix)
4207                 prefix = "";
4208 
4209         /*
4210          * check "dai-format = xxx"
4211          * or    "[prefix]format = xxx"
4212          * SND_SOC_DAIFMT_FORMAT_MASK area
4213          */
4214         ret = of_property_read_string(np, "dai-format", &str);
4215         if (ret < 0) {
4216                 snprintf(prop, sizeof(prop), "%sformat", prefix);
4217                 ret = of_property_read_string(np, prop, &str);
4218         }
4219         if (ret == 0) {
4220                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4221                         if (strcmp(str, of_fmt_table[i].name) == 0) {
4222                                 format |= of_fmt_table[i].val;
4223                                 break;
4224                         }
4225                 }
4226         }
4227 
4228         /*
4229          * check "[prefix]continuous-clock"
4230          * SND_SOC_DAIFMT_CLOCK_MASK area
4231          */
4232         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4233         if (of_property_read_bool(np, prop))
4234                 format |= SND_SOC_DAIFMT_CONT;
4235         else
4236                 format |= SND_SOC_DAIFMT_GATED;
4237 
4238         /*
4239          * check "[prefix]bitclock-inversion"
4240          * check "[prefix]frame-inversion"
4241          * SND_SOC_DAIFMT_INV_MASK area
4242          */
4243         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4244         bit = !!of_get_property(np, prop, NULL);
4245 
4246         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4247         frame = !!of_get_property(np, prop, NULL);
4248 
4249         switch ((bit << 4) + frame) {
4250         case 0x11:
4251                 format |= SND_SOC_DAIFMT_IB_IF;
4252                 break;
4253         case 0x10:
4254                 format |= SND_SOC_DAIFMT_IB_NF;
4255                 break;
4256         case 0x01:
4257                 format |= SND_SOC_DAIFMT_NB_IF;
4258                 break;
4259         default:
4260                 /* SND_SOC_DAIFMT_NB_NF is default */
4261                 break;
4262         }
4263 
4264         /*
4265          * check "[prefix]bitclock-master"
4266          * check "[prefix]frame-master"
4267          * SND_SOC_DAIFMT_MASTER_MASK area
4268          */
4269         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4270         bit = !!of_get_property(np, prop, NULL);
4271         if (bit && bitclkmaster)
4272                 *bitclkmaster = of_parse_phandle(np, prop, 0);
4273 
4274         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4275         frame = !!of_get_property(np, prop, NULL);
4276         if (frame && framemaster)
4277                 *framemaster = of_parse_phandle(np, prop, 0);
4278 
4279         switch ((bit << 4) + frame) {
4280         case 0x11:
4281                 format |= SND_SOC_DAIFMT_CBM_CFM;
4282                 break;
4283         case 0x10:
4284                 format |= SND_SOC_DAIFMT_CBM_CFS;
4285                 break;
4286         case 0x01:
4287                 format |= SND_SOC_DAIFMT_CBS_CFM;
4288                 break;
4289         default:
4290                 format |= SND_SOC_DAIFMT_CBS_CFS;
4291                 break;
4292         }
4293 
4294         return format;
4295 }
4296 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4297 
4298 int snd_soc_get_dai_id(struct device_node *ep)
4299 {
4300         struct snd_soc_component *pos;
4301         struct device_node *node;
4302         int ret;
4303 
4304         node = of_graph_get_port_parent(ep);
4305 
4306         /*
4307          * For example HDMI case, HDMI has video/sound port,
4308          * but ALSA SoC needs sound port number only.
4309          * Thus counting HDMI DT port/endpoint doesn't work.
4310          * Then, it should have .of_xlate_dai_id
4311          */
4312         ret = -ENOTSUPP;
4313         mutex_lock(&client_mutex);
4314         list_for_each_entry(pos, &component_list, list) {
4315                 struct device_node *component_of_node = pos->dev->of_node;
4316 
4317                 if (!component_of_node && pos->dev->parent)
4318                         component_of_node = pos->dev->parent->of_node;
4319 
4320                 if (component_of_node != node)
4321                         continue;
4322 
4323                 if (pos->driver->of_xlate_dai_id)
4324                         ret = pos->driver->of_xlate_dai_id(pos, ep);
4325 
4326                 break;
4327         }
4328         mutex_unlock(&client_mutex);
4329 
4330         of_node_put(node);
4331 
4332         return ret;
4333 }
4334 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
4335 
4336 int snd_soc_get_dai_name(struct of_phandle_args *args,
4337                                 const char **dai_name)
4338 {
4339         struct snd_soc_component *pos;
4340         struct device_node *component_of_node;
4341         int ret = -EPROBE_DEFER;
4342 
4343         mutex_lock(&client_mutex);
4344         list_for_each_entry(pos, &component_list, list) {
4345                 component_of_node = pos->dev->of_node;
4346                 if (!component_of_node && pos->dev->parent)
4347                         component_of_node = pos->dev->parent->of_node;
4348 
4349                 if (component_of_node != args->np)
4350                         continue;
4351 
4352                 if (pos->driver->of_xlate_dai_name) {
4353                         ret = pos->driver->of_xlate_dai_name(pos,
4354                                                              args,
4355                                                              dai_name);
4356                 } else {
4357                         int id = -1;
4358 
4359                         switch (args->args_count) {
4360                         case 0:
4361                                 id = 0; /* same as dai_drv[0] */
4362                                 break;
4363                         case 1:
4364                                 id = args->args[0];
4365                                 break;
4366                         default:
4367                                 /* not supported */
4368                                 break;
4369                         }
4370 
4371                         if (id < 0 || id >= pos->num_dai) {
4372                                 ret = -EINVAL;
4373                                 continue;
4374                         }
4375 
4376                         ret = 0;
4377 
4378                         *dai_name = pos->dai_drv[id].name;
4379                         if (!*dai_name)
4380                                 *dai_name = pos->name;
4381                 }
4382 
4383                 break;
4384         }
4385         mutex_unlock(&client_mutex);
4386         return ret;
4387 }
4388 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
4389 
4390 int snd_soc_of_get_dai_name(struct device_node *of_node,
4391                             const char **dai_name)
4392 {
4393         struct of_phandle_args args;
4394         int ret;
4395 
4396         ret = of_parse_phandle_with_args(of_node, "sound-dai",
4397                                          "#sound-dai-cells", 0, &args);
4398         if (ret)
4399                 return ret;
4400 
4401         ret = snd_soc_get_dai_name(&args, dai_name);
4402 
4403         of_node_put(args.np);
4404 
4405         return ret;
4406 }
4407 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4408 
4409 /*
4410  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
4411  * @dev: Card device
4412  * @of_node: Device node
4413  * @dai_link: DAI link
4414  *
4415  * Builds an array of CODEC DAI components from the DAI link property
4416  * 'sound-dai'.
4417  * The array is set in the DAI link and the number of DAIs is set accordingly.
4418  * The device nodes in the array (of_node) must be dereferenced by the caller.
4419  *
4420  * Returns 0 for success
4421  */
4422 int snd_soc_of_get_dai_link_codecs(struct device *dev,
4423                                    struct device_node *of_node,
4424                                    struct snd_soc_dai_link *dai_link)
4425 {
4426         struct of_phandle_args args;
4427         struct snd_soc_dai_link_component *component;
4428         char *name;
4429         int index, num_codecs, ret;
4430 
4431         /* Count the number of CODECs */
4432         name = "sound-dai";
4433         num_codecs = of_count_phandle_with_args(of_node, name,
4434                                                 "#sound-dai-cells");
4435         if (num_codecs <= 0) {
4436                 if (num_codecs == -ENOENT)
4437                         dev_err(dev, "No 'sound-dai' property\n");
4438                 else
4439                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
4440                 return num_codecs;
4441         }
4442         component = devm_kzalloc(dev,
4443                                  sizeof *component * num_codecs,
4444                                  GFP_KERNEL);
4445         if (!component)
4446                 return -ENOMEM;
4447         dai_link->codecs = component;
4448         dai_link->num_codecs = num_codecs;
4449 
4450         /* Parse the list */
4451         for (index = 0, component = dai_link->codecs;
4452              index < dai_link->num_codecs;
4453              index++, component++) {
4454                 ret = of_parse_phandle_with_args(of_node, name,
4455                                                  "#sound-dai-cells",
4456                                                   index, &args);
4457                 if (ret)
4458                         goto err;
4459                 component->of_node = args.np;
4460                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
4461                 if (ret < 0)
4462                         goto err;
4463         }
4464         return 0;
4465 err:
4466         for (index = 0, component = dai_link->codecs;
4467              index < dai_link->num_codecs;
4468              index++, component++) {
4469                 if (!component->of_node)
4470                         break;
4471                 of_node_put(component->of_node);
4472                 component->of_node = NULL;
4473         }
4474         dai_link->codecs = NULL;
4475         dai_link->num_codecs = 0;
4476         return ret;
4477 }
4478 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4479 
4480 static int __init snd_soc_init(void)
4481 {
4482         snd_soc_debugfs_init();
4483         snd_soc_util_init();
4484 
4485         return platform_driver_register(&soc_driver);
4486 }
4487 module_init(snd_soc_init);
4488 
4489 static void __exit snd_soc_exit(void)
4490 {
4491         snd_soc_util_exit();
4492         snd_soc_debugfs_exit();
4493 
4494         platform_driver_unregister(&soc_driver);
4495 }
4496 module_exit(snd_soc_exit);
4497 
4498 /* Module information */
4499 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4500 MODULE_DESCRIPTION("ALSA SoC Core");
4501 MODULE_LICENSE("GPL");
4502 MODULE_ALIAS("platform:soc-audio");
4503 

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