xref: /openbmc/linux/sound/soc/soc-core.c (revision ff6defa6)
1 /*
2  * soc-core.c  --  ALSA SoC Audio Layer
3  *
4  * Copyright 2005 Wolfson Microelectronics PLC.
5  * Copyright 2005 Openedhand Ltd.
6  * Copyright (C) 2010 Slimlogic Ltd.
7  * Copyright (C) 2010 Texas Instruments Inc.
8  *
9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10  *         with code, comments and ideas from :-
11  *         Richard Purdie <richard@openedhand.com>
12  *
13  *  This program is free software; you can redistribute  it and/or modify it
14  *  under  the terms of  the GNU General  Public License as published by the
15  *  Free Software Foundation;  either version 2 of the  License, or (at your
16  *  option) any later version.
17  *
18  *  TODO:
19  *   o Add hw rules to enforce rates, etc.
20  *   o More testing with other codecs/machines.
21  *   o Add more codecs and platforms to ensure good API coverage.
22  *   o Support TDM on PCM and I2S
23  */
24 
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
36 #include <linux/of.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
42 #include <sound/soc-dpcm.h>
43 #include <sound/initval.h>
44 
45 #define CREATE_TRACE_POINTS
46 #include <trace/events/asoc.h>
47 
48 #define NAME_SIZE	32
49 
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 #endif
54 
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(platform_list);
57 static LIST_HEAD(codec_list);
58 static LIST_HEAD(component_list);
59 
60 /*
61  * This is a timeout to do a DAPM powerdown after a stream is closed().
62  * It can be used to eliminate pops between different playback streams, e.g.
63  * between two audio tracks.
64  */
65 static int pmdown_time = 5000;
66 module_param(pmdown_time, int, 0);
67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
68 
69 /* returns the minimum number of bytes needed to represent
70  * a particular given value */
71 static int min_bytes_needed(unsigned long val)
72 {
73 	int c = 0;
74 	int i;
75 
76 	for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
77 		if (val & (1UL << i))
78 			break;
79 	c = (sizeof val * 8) - c;
80 	if (!c || (c % 8))
81 		c = (c + 8) / 8;
82 	else
83 		c /= 8;
84 	return c;
85 }
86 
87 /* fill buf which is 'len' bytes with a formatted
88  * string of the form 'reg: value\n' */
89 static int format_register_str(struct snd_soc_codec *codec,
90 			       unsigned int reg, char *buf, size_t len)
91 {
92 	int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
93 	int regsize = codec->driver->reg_word_size * 2;
94 	int ret;
95 	char tmpbuf[len + 1];
96 	char regbuf[regsize + 1];
97 
98 	/* since tmpbuf is allocated on the stack, warn the callers if they
99 	 * try to abuse this function */
100 	WARN_ON(len > 63);
101 
102 	/* +2 for ': ' and + 1 for '\n' */
103 	if (wordsize + regsize + 2 + 1 != len)
104 		return -EINVAL;
105 
106 	ret = snd_soc_read(codec, reg);
107 	if (ret < 0) {
108 		memset(regbuf, 'X', regsize);
109 		regbuf[regsize] = '\0';
110 	} else {
111 		snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
112 	}
113 
114 	/* prepare the buffer */
115 	snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
116 	/* copy it back to the caller without the '\0' */
117 	memcpy(buf, tmpbuf, len);
118 
119 	return 0;
120 }
121 
122 /* codec register dump */
123 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
124 				  size_t count, loff_t pos)
125 {
126 	int i, step = 1;
127 	int wordsize, regsize;
128 	int len;
129 	size_t total = 0;
130 	loff_t p = 0;
131 
132 	wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
133 	regsize = codec->driver->reg_word_size * 2;
134 
135 	len = wordsize + regsize + 2 + 1;
136 
137 	if (!codec->driver->reg_cache_size)
138 		return 0;
139 
140 	if (codec->driver->reg_cache_step)
141 		step = codec->driver->reg_cache_step;
142 
143 	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
144 		/* only support larger than PAGE_SIZE bytes debugfs
145 		 * entries for the default case */
146 		if (p >= pos) {
147 			if (total + len >= count - 1)
148 				break;
149 			format_register_str(codec, i, buf + total, len);
150 			total += len;
151 		}
152 		p += len;
153 	}
154 
155 	total = min(total, count - 1);
156 
157 	return total;
158 }
159 
160 static ssize_t codec_reg_show(struct device *dev,
161 	struct device_attribute *attr, char *buf)
162 {
163 	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
164 
165 	return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
166 }
167 
168 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
169 
170 static ssize_t pmdown_time_show(struct device *dev,
171 				struct device_attribute *attr, char *buf)
172 {
173 	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
174 
175 	return sprintf(buf, "%ld\n", rtd->pmdown_time);
176 }
177 
178 static ssize_t pmdown_time_set(struct device *dev,
179 			       struct device_attribute *attr,
180 			       const char *buf, size_t count)
181 {
182 	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
183 	int ret;
184 
185 	ret = kstrtol(buf, 10, &rtd->pmdown_time);
186 	if (ret)
187 		return ret;
188 
189 	return count;
190 }
191 
192 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
193 
194 #ifdef CONFIG_DEBUG_FS
195 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
196 				   size_t count, loff_t *ppos)
197 {
198 	ssize_t ret;
199 	struct snd_soc_codec *codec = file->private_data;
200 	char *buf;
201 
202 	if (*ppos < 0 || !count)
203 		return -EINVAL;
204 
205 	buf = kmalloc(count, GFP_KERNEL);
206 	if (!buf)
207 		return -ENOMEM;
208 
209 	ret = soc_codec_reg_show(codec, buf, count, *ppos);
210 	if (ret >= 0) {
211 		if (copy_to_user(user_buf, buf, ret)) {
212 			kfree(buf);
213 			return -EFAULT;
214 		}
215 		*ppos += ret;
216 	}
217 
218 	kfree(buf);
219 	return ret;
220 }
221 
222 static ssize_t codec_reg_write_file(struct file *file,
223 		const char __user *user_buf, size_t count, loff_t *ppos)
224 {
225 	char buf[32];
226 	size_t buf_size;
227 	char *start = buf;
228 	unsigned long reg, value;
229 	struct snd_soc_codec *codec = file->private_data;
230 	int ret;
231 
232 	buf_size = min(count, (sizeof(buf)-1));
233 	if (copy_from_user(buf, user_buf, buf_size))
234 		return -EFAULT;
235 	buf[buf_size] = 0;
236 
237 	while (*start == ' ')
238 		start++;
239 	reg = simple_strtoul(start, &start, 16);
240 	while (*start == ' ')
241 		start++;
242 	ret = kstrtoul(start, 16, &value);
243 	if (ret)
244 		return ret;
245 
246 	/* Userspace has been fiddling around behind the kernel's back */
247 	add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
248 
249 	snd_soc_write(codec, reg, value);
250 	return buf_size;
251 }
252 
253 static const struct file_operations codec_reg_fops = {
254 	.open = simple_open,
255 	.read = codec_reg_read_file,
256 	.write = codec_reg_write_file,
257 	.llseek = default_llseek,
258 };
259 
260 static void soc_init_component_debugfs(struct snd_soc_component *component)
261 {
262 	if (component->debugfs_prefix) {
263 		char *name;
264 
265 		name = kasprintf(GFP_KERNEL, "%s:%s",
266 			component->debugfs_prefix, component->name);
267 		if (name) {
268 			component->debugfs_root = debugfs_create_dir(name,
269 				component->card->debugfs_card_root);
270 			kfree(name);
271 		}
272 	} else {
273 		component->debugfs_root = debugfs_create_dir(component->name,
274 				component->card->debugfs_card_root);
275 	}
276 
277 	if (!component->debugfs_root) {
278 		dev_warn(component->dev,
279 			"ASoC: Failed to create component debugfs directory\n");
280 		return;
281 	}
282 
283 	snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
284 		component->debugfs_root);
285 
286 	if (component->init_debugfs)
287 		component->init_debugfs(component);
288 }
289 
290 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
291 {
292 	debugfs_remove_recursive(component->debugfs_root);
293 }
294 
295 static void soc_init_codec_debugfs(struct snd_soc_component *component)
296 {
297 	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
298 
299 	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
300 						 codec->component.debugfs_root,
301 						 codec, &codec_reg_fops);
302 	if (!codec->debugfs_reg)
303 		dev_warn(codec->dev,
304 			"ASoC: Failed to create codec register debugfs file\n");
305 }
306 
307 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
308 				    size_t count, loff_t *ppos)
309 {
310 	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
311 	ssize_t len, ret = 0;
312 	struct snd_soc_codec *codec;
313 
314 	if (!buf)
315 		return -ENOMEM;
316 
317 	list_for_each_entry(codec, &codec_list, list) {
318 		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
319 			       codec->component.name);
320 		if (len >= 0)
321 			ret += len;
322 		if (ret > PAGE_SIZE) {
323 			ret = PAGE_SIZE;
324 			break;
325 		}
326 	}
327 
328 	if (ret >= 0)
329 		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
330 
331 	kfree(buf);
332 
333 	return ret;
334 }
335 
336 static const struct file_operations codec_list_fops = {
337 	.read = codec_list_read_file,
338 	.llseek = default_llseek,/* read accesses f_pos */
339 };
340 
341 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
342 				  size_t count, loff_t *ppos)
343 {
344 	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
345 	ssize_t len, ret = 0;
346 	struct snd_soc_component *component;
347 	struct snd_soc_dai *dai;
348 
349 	if (!buf)
350 		return -ENOMEM;
351 
352 	list_for_each_entry(component, &component_list, list) {
353 		list_for_each_entry(dai, &component->dai_list, list) {
354 			len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
355 				dai->name);
356 			if (len >= 0)
357 				ret += len;
358 			if (ret > PAGE_SIZE) {
359 				ret = PAGE_SIZE;
360 				break;
361 			}
362 		}
363 	}
364 
365 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
366 
367 	kfree(buf);
368 
369 	return ret;
370 }
371 
372 static const struct file_operations dai_list_fops = {
373 	.read = dai_list_read_file,
374 	.llseek = default_llseek,/* read accesses f_pos */
375 };
376 
377 static ssize_t platform_list_read_file(struct file *file,
378 				       char __user *user_buf,
379 				       size_t count, loff_t *ppos)
380 {
381 	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
382 	ssize_t len, ret = 0;
383 	struct snd_soc_platform *platform;
384 
385 	if (!buf)
386 		return -ENOMEM;
387 
388 	list_for_each_entry(platform, &platform_list, list) {
389 		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
390 			       platform->component.name);
391 		if (len >= 0)
392 			ret += len;
393 		if (ret > PAGE_SIZE) {
394 			ret = PAGE_SIZE;
395 			break;
396 		}
397 	}
398 
399 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
400 
401 	kfree(buf);
402 
403 	return ret;
404 }
405 
406 static const struct file_operations platform_list_fops = {
407 	.read = platform_list_read_file,
408 	.llseek = default_llseek,/* read accesses f_pos */
409 };
410 
411 static void soc_init_card_debugfs(struct snd_soc_card *card)
412 {
413 	card->debugfs_card_root = debugfs_create_dir(card->name,
414 						     snd_soc_debugfs_root);
415 	if (!card->debugfs_card_root) {
416 		dev_warn(card->dev,
417 			 "ASoC: Failed to create card debugfs directory\n");
418 		return;
419 	}
420 
421 	card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
422 						    card->debugfs_card_root,
423 						    &card->pop_time);
424 	if (!card->debugfs_pop_time)
425 		dev_warn(card->dev,
426 		       "ASoC: Failed to create pop time debugfs file\n");
427 }
428 
429 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
430 {
431 	debugfs_remove_recursive(card->debugfs_card_root);
432 }
433 
434 #else
435 
436 #define soc_init_codec_debugfs NULL
437 
438 static inline void soc_init_component_debugfs(
439 	struct snd_soc_component *component)
440 {
441 }
442 
443 static inline void soc_cleanup_component_debugfs(
444 	struct snd_soc_component *component)
445 {
446 }
447 
448 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
449 {
450 }
451 
452 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
453 {
454 }
455 #endif
456 
457 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
458 		const char *dai_link, int stream)
459 {
460 	int i;
461 
462 	for (i = 0; i < card->num_links; i++) {
463 		if (card->rtd[i].dai_link->no_pcm &&
464 			!strcmp(card->rtd[i].dai_link->name, dai_link))
465 			return card->rtd[i].pcm->streams[stream].substream;
466 	}
467 	dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
468 	return NULL;
469 }
470 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
471 
472 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
473 		const char *dai_link)
474 {
475 	int i;
476 
477 	for (i = 0; i < card->num_links; i++) {
478 		if (!strcmp(card->rtd[i].dai_link->name, dai_link))
479 			return &card->rtd[i];
480 	}
481 	dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
482 	return NULL;
483 }
484 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
485 
486 static void codec2codec_close_delayed_work(struct work_struct *work)
487 {
488 	/* Currently nothing to do for c2c links
489 	 * Since c2c links are internal nodes in the DAPM graph and
490 	 * don't interface with the outside world or application layer
491 	 * we don't have to do any special handling on close.
492 	 */
493 }
494 
495 #ifdef CONFIG_PM_SLEEP
496 /* powers down audio subsystem for suspend */
497 int snd_soc_suspend(struct device *dev)
498 {
499 	struct snd_soc_card *card = dev_get_drvdata(dev);
500 	struct snd_soc_codec *codec;
501 	int i, j;
502 
503 	/* If the card is not initialized yet there is nothing to do */
504 	if (!card->instantiated)
505 		return 0;
506 
507 	/* Due to the resume being scheduled into a workqueue we could
508 	* suspend before that's finished - wait for it to complete.
509 	 */
510 	snd_power_lock(card->snd_card);
511 	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
512 	snd_power_unlock(card->snd_card);
513 
514 	/* we're going to block userspace touching us until resume completes */
515 	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
516 
517 	/* mute any active DACs */
518 	for (i = 0; i < card->num_rtd; i++) {
519 
520 		if (card->rtd[i].dai_link->ignore_suspend)
521 			continue;
522 
523 		for (j = 0; j < card->rtd[i].num_codecs; j++) {
524 			struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
525 			struct snd_soc_dai_driver *drv = dai->driver;
526 
527 			if (drv->ops->digital_mute && dai->playback_active)
528 				drv->ops->digital_mute(dai, 1);
529 		}
530 	}
531 
532 	/* suspend all pcms */
533 	for (i = 0; i < card->num_rtd; i++) {
534 		if (card->rtd[i].dai_link->ignore_suspend)
535 			continue;
536 
537 		snd_pcm_suspend_all(card->rtd[i].pcm);
538 	}
539 
540 	if (card->suspend_pre)
541 		card->suspend_pre(card);
542 
543 	for (i = 0; i < card->num_rtd; i++) {
544 		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
545 
546 		if (card->rtd[i].dai_link->ignore_suspend)
547 			continue;
548 
549 		if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
550 			cpu_dai->driver->suspend(cpu_dai);
551 	}
552 
553 	/* close any waiting streams and save state */
554 	for (i = 0; i < card->num_rtd; i++) {
555 		struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
556 		flush_delayed_work(&card->rtd[i].delayed_work);
557 		for (j = 0; j < card->rtd[i].num_codecs; j++) {
558 			codec_dais[j]->codec->dapm.suspend_bias_level =
559 					codec_dais[j]->codec->dapm.bias_level;
560 		}
561 	}
562 
563 	for (i = 0; i < card->num_rtd; i++) {
564 
565 		if (card->rtd[i].dai_link->ignore_suspend)
566 			continue;
567 
568 		snd_soc_dapm_stream_event(&card->rtd[i],
569 					  SNDRV_PCM_STREAM_PLAYBACK,
570 					  SND_SOC_DAPM_STREAM_SUSPEND);
571 
572 		snd_soc_dapm_stream_event(&card->rtd[i],
573 					  SNDRV_PCM_STREAM_CAPTURE,
574 					  SND_SOC_DAPM_STREAM_SUSPEND);
575 	}
576 
577 	/* Recheck all endpoints too, their state is affected by suspend */
578 	dapm_mark_endpoints_dirty(card);
579 	snd_soc_dapm_sync(&card->dapm);
580 
581 	/* suspend all CODECs */
582 	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
583 		/* If there are paths active then the CODEC will be held with
584 		 * bias _ON and should not be suspended. */
585 		if (!codec->suspended) {
586 			switch (codec->dapm.bias_level) {
587 			case SND_SOC_BIAS_STANDBY:
588 				/*
589 				 * If the CODEC is capable of idle
590 				 * bias off then being in STANDBY
591 				 * means it's doing something,
592 				 * otherwise fall through.
593 				 */
594 				if (codec->dapm.idle_bias_off) {
595 					dev_dbg(codec->dev,
596 						"ASoC: idle_bias_off CODEC on over suspend\n");
597 					break;
598 				}
599 
600 			case SND_SOC_BIAS_OFF:
601 				if (codec->driver->suspend)
602 					codec->driver->suspend(codec);
603 				codec->suspended = 1;
604 				if (codec->component.regmap)
605 					regcache_mark_dirty(codec->component.regmap);
606 				/* deactivate pins to sleep state */
607 				pinctrl_pm_select_sleep_state(codec->dev);
608 				break;
609 			default:
610 				dev_dbg(codec->dev,
611 					"ASoC: CODEC is on over suspend\n");
612 				break;
613 			}
614 		}
615 	}
616 
617 	for (i = 0; i < card->num_rtd; i++) {
618 		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
619 
620 		if (card->rtd[i].dai_link->ignore_suspend)
621 			continue;
622 
623 		if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
624 			cpu_dai->driver->suspend(cpu_dai);
625 
626 		/* deactivate pins to sleep state */
627 		pinctrl_pm_select_sleep_state(cpu_dai->dev);
628 	}
629 
630 	if (card->suspend_post)
631 		card->suspend_post(card);
632 
633 	return 0;
634 }
635 EXPORT_SYMBOL_GPL(snd_soc_suspend);
636 
637 /* deferred resume work, so resume can complete before we finished
638  * setting our codec back up, which can be very slow on I2C
639  */
640 static void soc_resume_deferred(struct work_struct *work)
641 {
642 	struct snd_soc_card *card =
643 			container_of(work, struct snd_soc_card, deferred_resume_work);
644 	struct snd_soc_codec *codec;
645 	int i, j;
646 
647 	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
648 	 * so userspace apps are blocked from touching us
649 	 */
650 
651 	dev_dbg(card->dev, "ASoC: starting resume work\n");
652 
653 	/* Bring us up into D2 so that DAPM starts enabling things */
654 	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
655 
656 	if (card->resume_pre)
657 		card->resume_pre(card);
658 
659 	/* resume control bus DAIs */
660 	for (i = 0; i < card->num_rtd; i++) {
661 		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
662 
663 		if (card->rtd[i].dai_link->ignore_suspend)
664 			continue;
665 
666 		if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
667 			cpu_dai->driver->resume(cpu_dai);
668 	}
669 
670 	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
671 		/* If the CODEC was idle over suspend then it will have been
672 		 * left with bias OFF or STANDBY and suspended so we must now
673 		 * resume.  Otherwise the suspend was suppressed.
674 		 */
675 		if (codec->suspended) {
676 			switch (codec->dapm.bias_level) {
677 			case SND_SOC_BIAS_STANDBY:
678 			case SND_SOC_BIAS_OFF:
679 				if (codec->driver->resume)
680 					codec->driver->resume(codec);
681 				codec->suspended = 0;
682 				break;
683 			default:
684 				dev_dbg(codec->dev,
685 					"ASoC: CODEC was on over suspend\n");
686 				break;
687 			}
688 		}
689 	}
690 
691 	for (i = 0; i < card->num_rtd; i++) {
692 
693 		if (card->rtd[i].dai_link->ignore_suspend)
694 			continue;
695 
696 		snd_soc_dapm_stream_event(&card->rtd[i],
697 					  SNDRV_PCM_STREAM_PLAYBACK,
698 					  SND_SOC_DAPM_STREAM_RESUME);
699 
700 		snd_soc_dapm_stream_event(&card->rtd[i],
701 					  SNDRV_PCM_STREAM_CAPTURE,
702 					  SND_SOC_DAPM_STREAM_RESUME);
703 	}
704 
705 	/* unmute any active DACs */
706 	for (i = 0; i < card->num_rtd; i++) {
707 
708 		if (card->rtd[i].dai_link->ignore_suspend)
709 			continue;
710 
711 		for (j = 0; j < card->rtd[i].num_codecs; j++) {
712 			struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
713 			struct snd_soc_dai_driver *drv = dai->driver;
714 
715 			if (drv->ops->digital_mute && dai->playback_active)
716 				drv->ops->digital_mute(dai, 0);
717 		}
718 	}
719 
720 	for (i = 0; i < card->num_rtd; i++) {
721 		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
722 
723 		if (card->rtd[i].dai_link->ignore_suspend)
724 			continue;
725 
726 		if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
727 			cpu_dai->driver->resume(cpu_dai);
728 	}
729 
730 	if (card->resume_post)
731 		card->resume_post(card);
732 
733 	dev_dbg(card->dev, "ASoC: resume work completed\n");
734 
735 	/* userspace can access us now we are back as we were before */
736 	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
737 
738 	/* Recheck all endpoints too, their state is affected by suspend */
739 	dapm_mark_endpoints_dirty(card);
740 	snd_soc_dapm_sync(&card->dapm);
741 }
742 
743 /* powers up audio subsystem after a suspend */
744 int snd_soc_resume(struct device *dev)
745 {
746 	struct snd_soc_card *card = dev_get_drvdata(dev);
747 	bool bus_control = false;
748 	int i;
749 
750 	/* If the card is not initialized yet there is nothing to do */
751 	if (!card->instantiated)
752 		return 0;
753 
754 	/* activate pins from sleep state */
755 	for (i = 0; i < card->num_rtd; i++) {
756 		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
757 		struct snd_soc_dai **codec_dais = rtd->codec_dais;
758 		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
759 		int j;
760 
761 		if (cpu_dai->active)
762 			pinctrl_pm_select_default_state(cpu_dai->dev);
763 
764 		for (j = 0; j < rtd->num_codecs; j++) {
765 			struct snd_soc_dai *codec_dai = codec_dais[j];
766 			if (codec_dai->active)
767 				pinctrl_pm_select_default_state(codec_dai->dev);
768 		}
769 	}
770 
771 	/*
772 	 * DAIs that also act as the control bus master might have other drivers
773 	 * hanging off them so need to resume immediately. Other drivers don't
774 	 * have that problem and may take a substantial amount of time to resume
775 	 * due to I/O costs and anti-pop so handle them out of line.
776 	 */
777 	for (i = 0; i < card->num_rtd; i++) {
778 		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
779 		bus_control |= cpu_dai->driver->bus_control;
780 	}
781 	if (bus_control) {
782 		dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
783 		soc_resume_deferred(&card->deferred_resume_work);
784 	} else {
785 		dev_dbg(dev, "ASoC: Scheduling resume work\n");
786 		if (!schedule_work(&card->deferred_resume_work))
787 			dev_err(dev, "ASoC: resume work item may be lost\n");
788 	}
789 
790 	return 0;
791 }
792 EXPORT_SYMBOL_GPL(snd_soc_resume);
793 #else
794 #define snd_soc_suspend NULL
795 #define snd_soc_resume NULL
796 #endif
797 
798 static const struct snd_soc_dai_ops null_dai_ops = {
799 };
800 
801 static struct snd_soc_component *soc_find_component(
802 	const struct device_node *of_node, const char *name)
803 {
804 	struct snd_soc_component *component;
805 
806 	list_for_each_entry(component, &component_list, list) {
807 		if (of_node) {
808 			if (component->dev->of_node == of_node)
809 				return component;
810 		} else if (strcmp(component->name, name) == 0) {
811 			return component;
812 		}
813 	}
814 
815 	return NULL;
816 }
817 
818 static struct snd_soc_dai *snd_soc_find_dai(
819 	const struct snd_soc_dai_link_component *dlc)
820 {
821 	struct snd_soc_component *component;
822 	struct snd_soc_dai *dai;
823 
824 	/* Find CPU DAI from registered DAIs*/
825 	list_for_each_entry(component, &component_list, list) {
826 		if (dlc->of_node && component->dev->of_node != dlc->of_node)
827 			continue;
828 		if (dlc->name && strcmp(component->name, dlc->name))
829 			continue;
830 		list_for_each_entry(dai, &component->dai_list, list) {
831 			if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
832 				continue;
833 
834 			return dai;
835 		}
836 	}
837 
838 	return NULL;
839 }
840 
841 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
842 {
843 	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
844 	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
845 	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
846 	struct snd_soc_dai_link_component cpu_dai_component;
847 	struct snd_soc_dai **codec_dais = rtd->codec_dais;
848 	struct snd_soc_platform *platform;
849 	const char *platform_name;
850 	int i;
851 
852 	dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
853 
854 	cpu_dai_component.name = dai_link->cpu_name;
855 	cpu_dai_component.of_node = dai_link->cpu_of_node;
856 	cpu_dai_component.dai_name = dai_link->cpu_dai_name;
857 	rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
858 	if (!rtd->cpu_dai) {
859 		dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
860 			dai_link->cpu_dai_name);
861 		return -EPROBE_DEFER;
862 	}
863 
864 	rtd->num_codecs = dai_link->num_codecs;
865 
866 	/* Find CODEC from registered CODECs */
867 	for (i = 0; i < rtd->num_codecs; i++) {
868 		codec_dais[i] = snd_soc_find_dai(&codecs[i]);
869 		if (!codec_dais[i]) {
870 			dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
871 				codecs[i].dai_name);
872 			return -EPROBE_DEFER;
873 		}
874 	}
875 
876 	/* Single codec links expect codec and codec_dai in runtime data */
877 	rtd->codec_dai = codec_dais[0];
878 	rtd->codec = rtd->codec_dai->codec;
879 
880 	/* if there's no platform we match on the empty platform */
881 	platform_name = dai_link->platform_name;
882 	if (!platform_name && !dai_link->platform_of_node)
883 		platform_name = "snd-soc-dummy";
884 
885 	/* find one from the set of registered platforms */
886 	list_for_each_entry(platform, &platform_list, list) {
887 		if (dai_link->platform_of_node) {
888 			if (platform->dev->of_node !=
889 			    dai_link->platform_of_node)
890 				continue;
891 		} else {
892 			if (strcmp(platform->component.name, platform_name))
893 				continue;
894 		}
895 
896 		rtd->platform = platform;
897 	}
898 	if (!rtd->platform) {
899 		dev_err(card->dev, "ASoC: platform %s not registered\n",
900 			dai_link->platform_name);
901 		return -EPROBE_DEFER;
902 	}
903 
904 	card->num_rtd++;
905 
906 	return 0;
907 }
908 
909 static void soc_remove_component(struct snd_soc_component *component)
910 {
911 	if (!component->probed)
912 		return;
913 
914 	/* This is a HACK and will be removed soon */
915 	if (component->codec)
916 		list_del(&component->codec->card_list);
917 
918 	if (component->remove)
919 		component->remove(component);
920 
921 	snd_soc_dapm_free(snd_soc_component_get_dapm(component));
922 
923 	soc_cleanup_component_debugfs(component);
924 	component->probed = 0;
925 	module_put(component->dev->driver->owner);
926 }
927 
928 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
929 {
930 	int err;
931 
932 	if (dai && dai->probed &&
933 			dai->driver->remove_order == order) {
934 		if (dai->driver->remove) {
935 			err = dai->driver->remove(dai);
936 			if (err < 0)
937 				dev_err(dai->dev,
938 					"ASoC: failed to remove %s: %d\n",
939 					dai->name, err);
940 		}
941 		dai->probed = 0;
942 	}
943 }
944 
945 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
946 {
947 	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
948 	int i;
949 
950 	/* unregister the rtd device */
951 	if (rtd->dev_registered) {
952 		device_remove_file(rtd->dev, &dev_attr_pmdown_time);
953 		device_remove_file(rtd->dev, &dev_attr_codec_reg);
954 		device_unregister(rtd->dev);
955 		rtd->dev_registered = 0;
956 	}
957 
958 	/* remove the CODEC DAI */
959 	for (i = 0; i < rtd->num_codecs; i++)
960 		soc_remove_dai(rtd->codec_dais[i], order);
961 
962 	soc_remove_dai(rtd->cpu_dai, order);
963 }
964 
965 static void soc_remove_link_components(struct snd_soc_card *card, int num,
966 				       int order)
967 {
968 	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
969 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
970 	struct snd_soc_platform *platform = rtd->platform;
971 	struct snd_soc_component *component;
972 	int i;
973 
974 	/* remove the platform */
975 	if (platform && platform->component.driver->remove_order == order)
976 		soc_remove_component(&platform->component);
977 
978 	/* remove the CODEC-side CODEC */
979 	for (i = 0; i < rtd->num_codecs; i++) {
980 		component = rtd->codec_dais[i]->component;
981 		if (component->driver->remove_order == order)
982 			soc_remove_component(component);
983 	}
984 
985 	/* remove any CPU-side CODEC */
986 	if (cpu_dai) {
987 		if (cpu_dai->component->driver->remove_order == order)
988 			soc_remove_component(cpu_dai->component);
989 	}
990 }
991 
992 static void soc_remove_dai_links(struct snd_soc_card *card)
993 {
994 	int dai, order;
995 
996 	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
997 			order++) {
998 		for (dai = 0; dai < card->num_rtd; dai++)
999 			soc_remove_link_dais(card, dai, order);
1000 	}
1001 
1002 	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1003 			order++) {
1004 		for (dai = 0; dai < card->num_rtd; dai++)
1005 			soc_remove_link_components(card, dai, order);
1006 	}
1007 
1008 	card->num_rtd = 0;
1009 }
1010 
1011 static void soc_set_name_prefix(struct snd_soc_card *card,
1012 				struct snd_soc_component *component)
1013 {
1014 	int i;
1015 
1016 	if (card->codec_conf == NULL)
1017 		return;
1018 
1019 	for (i = 0; i < card->num_configs; i++) {
1020 		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1021 		if (map->of_node && component->dev->of_node != map->of_node)
1022 			continue;
1023 		if (map->dev_name && strcmp(component->name, map->dev_name))
1024 			continue;
1025 		component->name_prefix = map->name_prefix;
1026 		break;
1027 	}
1028 }
1029 
1030 static int soc_probe_component(struct snd_soc_card *card,
1031 	struct snd_soc_component *component)
1032 {
1033 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1034 	struct snd_soc_dai *dai;
1035 	int ret;
1036 
1037 	if (component->probed)
1038 		return 0;
1039 
1040 	component->card = card;
1041 	dapm->card = card;
1042 	soc_set_name_prefix(card, component);
1043 
1044 	if (!try_module_get(component->dev->driver->owner))
1045 		return -ENODEV;
1046 
1047 	soc_init_component_debugfs(component);
1048 
1049 	if (component->dapm_widgets) {
1050 		ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1051 			component->num_dapm_widgets);
1052 
1053 		if (ret != 0) {
1054 			dev_err(component->dev,
1055 				"Failed to create new controls %d\n", ret);
1056 			goto err_probe;
1057 		}
1058 	}
1059 
1060 	list_for_each_entry(dai, &component->dai_list, list) {
1061 		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1062 		if (ret != 0) {
1063 			dev_err(component->dev,
1064 				"Failed to create DAI widgets %d\n", ret);
1065 			goto err_probe;
1066 		}
1067 	}
1068 
1069 	if (component->probe) {
1070 		ret = component->probe(component);
1071 		if (ret < 0) {
1072 			dev_err(component->dev,
1073 				"ASoC: failed to probe component %d\n", ret);
1074 			goto err_probe;
1075 		}
1076 
1077 		WARN(dapm->idle_bias_off &&
1078 			dapm->bias_level != SND_SOC_BIAS_OFF,
1079 			"codec %s can not start from non-off bias with idle_bias_off==1\n",
1080 			component->name);
1081 	}
1082 
1083 	if (component->controls)
1084 		snd_soc_add_component_controls(component, component->controls,
1085 				     component->num_controls);
1086 	if (component->dapm_routes)
1087 		snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1088 					component->num_dapm_routes);
1089 
1090 	component->probed = 1;
1091 	list_add(&dapm->list, &card->dapm_list);
1092 
1093 	/* This is a HACK and will be removed soon */
1094 	if (component->codec)
1095 		list_add(&component->codec->card_list, &card->codec_dev_list);
1096 
1097 	return 0;
1098 
1099 err_probe:
1100 	soc_cleanup_component_debugfs(component);
1101 	module_put(component->dev->driver->owner);
1102 
1103 	return ret;
1104 }
1105 
1106 static void rtd_release(struct device *dev)
1107 {
1108 	kfree(dev);
1109 }
1110 
1111 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1112 	const char *name)
1113 {
1114 	int ret = 0;
1115 
1116 	/* register the rtd device */
1117 	rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1118 	if (!rtd->dev)
1119 		return -ENOMEM;
1120 	device_initialize(rtd->dev);
1121 	rtd->dev->parent = rtd->card->dev;
1122 	rtd->dev->release = rtd_release;
1123 	dev_set_name(rtd->dev, "%s", name);
1124 	dev_set_drvdata(rtd->dev, rtd);
1125 	mutex_init(&rtd->pcm_mutex);
1126 	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1127 	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1128 	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1129 	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1130 	ret = device_add(rtd->dev);
1131 	if (ret < 0) {
1132 		/* calling put_device() here to free the rtd->dev */
1133 		put_device(rtd->dev);
1134 		dev_err(rtd->card->dev,
1135 			"ASoC: failed to register runtime device: %d\n", ret);
1136 		return ret;
1137 	}
1138 	rtd->dev_registered = 1;
1139 
1140 	if (rtd->codec) {
1141 		/* add DAPM sysfs entries for this codec */
1142 		ret = snd_soc_dapm_sys_add(rtd->dev);
1143 		if (ret < 0)
1144 			dev_err(rtd->dev,
1145 				"ASoC: failed to add codec dapm sysfs entries: %d\n",
1146 				ret);
1147 
1148 		/* add codec sysfs entries */
1149 		ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1150 		if (ret < 0)
1151 			dev_err(rtd->dev,
1152 				"ASoC: failed to add codec sysfs files: %d\n",
1153 				ret);
1154 	}
1155 
1156 	return 0;
1157 }
1158 
1159 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1160 				     int order)
1161 {
1162 	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1163 	struct snd_soc_platform *platform = rtd->platform;
1164 	struct snd_soc_component *component;
1165 	int i, ret;
1166 
1167 	/* probe the CPU-side component, if it is a CODEC */
1168 	component = rtd->cpu_dai->component;
1169 	if (component->driver->probe_order == order) {
1170 		ret = soc_probe_component(card, component);
1171 		if (ret < 0)
1172 			return ret;
1173 	}
1174 
1175 	/* probe the CODEC-side components */
1176 	for (i = 0; i < rtd->num_codecs; i++) {
1177 		component = rtd->codec_dais[i]->component;
1178 		if (component->driver->probe_order == order) {
1179 			ret = soc_probe_component(card, component);
1180 			if (ret < 0)
1181 				return ret;
1182 		}
1183 	}
1184 
1185 	/* probe the platform */
1186 	if (platform->component.driver->probe_order == order) {
1187 		ret = soc_probe_component(card, &platform->component);
1188 		if (ret < 0)
1189 			return ret;
1190 	}
1191 
1192 	return 0;
1193 }
1194 
1195 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1196 {
1197 	int ret;
1198 
1199 	if (!dai->probed && dai->driver->probe_order == order) {
1200 		if (dai->driver->probe) {
1201 			ret = dai->driver->probe(dai);
1202 			if (ret < 0) {
1203 				dev_err(dai->dev,
1204 					"ASoC: failed to probe DAI %s: %d\n",
1205 					dai->name, ret);
1206 				return ret;
1207 			}
1208 		}
1209 
1210 		dai->probed = 1;
1211 	}
1212 
1213 	return 0;
1214 }
1215 
1216 static int soc_link_dai_widgets(struct snd_soc_card *card,
1217 				struct snd_soc_dai_link *dai_link,
1218 				struct snd_soc_pcm_runtime *rtd)
1219 {
1220 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1221 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
1222 	struct snd_soc_dapm_widget *play_w, *capture_w;
1223 	int ret;
1224 
1225 	if (rtd->num_codecs > 1)
1226 		dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1227 
1228 	/* link the DAI widgets */
1229 	play_w = codec_dai->playback_widget;
1230 	capture_w = cpu_dai->capture_widget;
1231 	if (play_w && capture_w) {
1232 		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1233 					   capture_w, play_w);
1234 		if (ret != 0) {
1235 			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1236 				play_w->name, capture_w->name, ret);
1237 			return ret;
1238 		}
1239 	}
1240 
1241 	play_w = cpu_dai->playback_widget;
1242 	capture_w = codec_dai->capture_widget;
1243 	if (play_w && capture_w) {
1244 		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1245 					   capture_w, play_w);
1246 		if (ret != 0) {
1247 			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1248 				play_w->name, capture_w->name, ret);
1249 			return ret;
1250 		}
1251 	}
1252 
1253 	return 0;
1254 }
1255 
1256 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1257 {
1258 	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1259 	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1260 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1261 	int i, ret;
1262 
1263 	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1264 			card->name, num, order);
1265 
1266 	/* set default power off timeout */
1267 	rtd->pmdown_time = pmdown_time;
1268 
1269 	ret = soc_probe_dai(cpu_dai, order);
1270 	if (ret)
1271 		return ret;
1272 
1273 	/* probe the CODEC DAI */
1274 	for (i = 0; i < rtd->num_codecs; i++) {
1275 		ret = soc_probe_dai(rtd->codec_dais[i], order);
1276 		if (ret)
1277 			return ret;
1278 	}
1279 
1280 	/* complete DAI probe during last probe */
1281 	if (order != SND_SOC_COMP_ORDER_LAST)
1282 		return 0;
1283 
1284 	/* do machine specific initialization */
1285 	if (dai_link->init) {
1286 		ret = dai_link->init(rtd);
1287 		if (ret < 0) {
1288 			dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1289 				dai_link->name, ret);
1290 			return ret;
1291 		}
1292 	}
1293 
1294 	ret = soc_post_component_init(rtd, dai_link->name);
1295 	if (ret)
1296 		return ret;
1297 
1298 #ifdef CONFIG_DEBUG_FS
1299 	/* add DPCM sysfs entries */
1300 	if (dai_link->dynamic) {
1301 		ret = soc_dpcm_debugfs_add(rtd);
1302 		if (ret < 0) {
1303 			dev_err(rtd->dev,
1304 				"ASoC: failed to add dpcm sysfs entries: %d\n",
1305 				ret);
1306 			return ret;
1307 		}
1308 	}
1309 #endif
1310 
1311 	ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1312 	if (ret < 0)
1313 		dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1314 			ret);
1315 
1316 	if (cpu_dai->driver->compress_dai) {
1317 		/*create compress_device"*/
1318 		ret = soc_new_compress(rtd, num);
1319 		if (ret < 0) {
1320 			dev_err(card->dev, "ASoC: can't create compress %s\n",
1321 					 dai_link->stream_name);
1322 			return ret;
1323 		}
1324 	} else {
1325 
1326 		if (!dai_link->params) {
1327 			/* create the pcm */
1328 			ret = soc_new_pcm(rtd, num);
1329 			if (ret < 0) {
1330 				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1331 				       dai_link->stream_name, ret);
1332 				return ret;
1333 			}
1334 		} else {
1335 			INIT_DELAYED_WORK(&rtd->delayed_work,
1336 						codec2codec_close_delayed_work);
1337 
1338 			/* link the DAI widgets */
1339 			ret = soc_link_dai_widgets(card, dai_link, rtd);
1340 			if (ret)
1341 				return ret;
1342 		}
1343 	}
1344 
1345 	return 0;
1346 }
1347 
1348 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1349 {
1350 	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1351 	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1352 	const char *name = aux_dev->codec_name;
1353 
1354 	rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1355 	if (!rtd->component) {
1356 		if (aux_dev->codec_of_node)
1357 			name = of_node_full_name(aux_dev->codec_of_node);
1358 
1359 		dev_err(card->dev, "ASoC: %s not registered\n", name);
1360 		return -EPROBE_DEFER;
1361 	}
1362 
1363 	/*
1364 	 * Some places still reference rtd->codec, so we have to keep that
1365 	 * initialized if the component is a CODEC. Once all those references
1366 	 * have been removed, this code can be removed as well.
1367 	 */
1368 	 rtd->codec = rtd->component->codec;
1369 
1370 	return 0;
1371 }
1372 
1373 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1374 {
1375 	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1376 	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1377 	int ret;
1378 
1379 	ret = soc_probe_component(card, rtd->component);
1380 	if (ret < 0)
1381 		return ret;
1382 
1383 	/* do machine specific initialization */
1384 	if (aux_dev->init) {
1385 		ret = aux_dev->init(rtd->component);
1386 		if (ret < 0) {
1387 			dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1388 				aux_dev->name, ret);
1389 			return ret;
1390 		}
1391 	}
1392 
1393 	return soc_post_component_init(rtd, aux_dev->name);
1394 }
1395 
1396 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1397 {
1398 	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1399 	struct snd_soc_component *component = rtd->component;
1400 
1401 	/* unregister the rtd device */
1402 	if (rtd->dev_registered) {
1403 		device_remove_file(rtd->dev, &dev_attr_codec_reg);
1404 		device_unregister(rtd->dev);
1405 		rtd->dev_registered = 0;
1406 	}
1407 
1408 	if (component && component->probed)
1409 		soc_remove_component(component);
1410 }
1411 
1412 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1413 {
1414 	int ret;
1415 
1416 	if (codec->cache_init)
1417 		return 0;
1418 
1419 	ret = snd_soc_cache_init(codec);
1420 	if (ret < 0) {
1421 		dev_err(codec->dev,
1422 			"ASoC: Failed to set cache compression type: %d\n",
1423 			ret);
1424 		return ret;
1425 	}
1426 	codec->cache_init = 1;
1427 	return 0;
1428 }
1429 
1430 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1431 {
1432 	struct snd_soc_codec *codec;
1433 	struct snd_soc_dai_link *dai_link;
1434 	int ret, i, order, dai_fmt;
1435 
1436 	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1437 
1438 	/* bind DAIs */
1439 	for (i = 0; i < card->num_links; i++) {
1440 		ret = soc_bind_dai_link(card, i);
1441 		if (ret != 0)
1442 			goto base_error;
1443 	}
1444 
1445 	/* bind aux_devs too */
1446 	for (i = 0; i < card->num_aux_devs; i++) {
1447 		ret = soc_bind_aux_dev(card, i);
1448 		if (ret != 0)
1449 			goto base_error;
1450 	}
1451 
1452 	/* initialize the register cache for each available codec */
1453 	list_for_each_entry(codec, &codec_list, list) {
1454 		if (codec->cache_init)
1455 			continue;
1456 		ret = snd_soc_init_codec_cache(codec);
1457 		if (ret < 0)
1458 			goto base_error;
1459 	}
1460 
1461 	/* card bind complete so register a sound card */
1462 	ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1463 			card->owner, 0, &card->snd_card);
1464 	if (ret < 0) {
1465 		dev_err(card->dev,
1466 			"ASoC: can't create sound card for card %s: %d\n",
1467 			card->name, ret);
1468 		goto base_error;
1469 	}
1470 
1471 	card->dapm.bias_level = SND_SOC_BIAS_OFF;
1472 	card->dapm.dev = card->dev;
1473 	card->dapm.card = card;
1474 	list_add(&card->dapm.list, &card->dapm_list);
1475 
1476 #ifdef CONFIG_DEBUG_FS
1477 	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1478 #endif
1479 
1480 #ifdef CONFIG_PM_SLEEP
1481 	/* deferred resume work */
1482 	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1483 #endif
1484 
1485 	if (card->dapm_widgets)
1486 		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1487 					  card->num_dapm_widgets);
1488 
1489 	/* initialise the sound card only once */
1490 	if (card->probe) {
1491 		ret = card->probe(card);
1492 		if (ret < 0)
1493 			goto card_probe_error;
1494 	}
1495 
1496 	/* probe all components used by DAI links on this card */
1497 	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1498 			order++) {
1499 		for (i = 0; i < card->num_links; i++) {
1500 			ret = soc_probe_link_components(card, i, order);
1501 			if (ret < 0) {
1502 				dev_err(card->dev,
1503 					"ASoC: failed to instantiate card %d\n",
1504 					ret);
1505 				goto probe_dai_err;
1506 			}
1507 		}
1508 	}
1509 
1510 	/* probe all DAI links on this card */
1511 	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1512 			order++) {
1513 		for (i = 0; i < card->num_links; i++) {
1514 			ret = soc_probe_link_dais(card, i, order);
1515 			if (ret < 0) {
1516 				dev_err(card->dev,
1517 					"ASoC: failed to instantiate card %d\n",
1518 					ret);
1519 				goto probe_dai_err;
1520 			}
1521 		}
1522 	}
1523 
1524 	for (i = 0; i < card->num_aux_devs; i++) {
1525 		ret = soc_probe_aux_dev(card, i);
1526 		if (ret < 0) {
1527 			dev_err(card->dev,
1528 				"ASoC: failed to add auxiliary devices %d\n",
1529 				ret);
1530 			goto probe_aux_dev_err;
1531 		}
1532 	}
1533 
1534 	snd_soc_dapm_link_dai_widgets(card);
1535 	snd_soc_dapm_connect_dai_link_widgets(card);
1536 
1537 	if (card->controls)
1538 		snd_soc_add_card_controls(card, card->controls, card->num_controls);
1539 
1540 	if (card->dapm_routes)
1541 		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1542 					card->num_dapm_routes);
1543 
1544 	for (i = 0; i < card->num_links; i++) {
1545 		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1546 		dai_link = &card->dai_link[i];
1547 		dai_fmt = dai_link->dai_fmt;
1548 
1549 		if (dai_fmt) {
1550 			struct snd_soc_dai **codec_dais = rtd->codec_dais;
1551 			int j;
1552 
1553 			for (j = 0; j < rtd->num_codecs; j++) {
1554 				struct snd_soc_dai *codec_dai = codec_dais[j];
1555 
1556 				ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1557 				if (ret != 0 && ret != -ENOTSUPP)
1558 					dev_warn(codec_dai->dev,
1559 						 "ASoC: Failed to set DAI format: %d\n",
1560 						 ret);
1561 			}
1562 		}
1563 
1564 		/* If this is a regular CPU link there will be a platform */
1565 		if (dai_fmt &&
1566 		    (dai_link->platform_name || dai_link->platform_of_node)) {
1567 			ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1568 						  dai_fmt);
1569 			if (ret != 0 && ret != -ENOTSUPP)
1570 				dev_warn(card->rtd[i].cpu_dai->dev,
1571 					 "ASoC: Failed to set DAI format: %d\n",
1572 					 ret);
1573 		} else if (dai_fmt) {
1574 			/* Flip the polarity for the "CPU" end */
1575 			dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1576 			switch (dai_link->dai_fmt &
1577 				SND_SOC_DAIFMT_MASTER_MASK) {
1578 			case SND_SOC_DAIFMT_CBM_CFM:
1579 				dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1580 				break;
1581 			case SND_SOC_DAIFMT_CBM_CFS:
1582 				dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1583 				break;
1584 			case SND_SOC_DAIFMT_CBS_CFM:
1585 				dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1586 				break;
1587 			case SND_SOC_DAIFMT_CBS_CFS:
1588 				dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1589 				break;
1590 			}
1591 
1592 			ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1593 						  dai_fmt);
1594 			if (ret != 0 && ret != -ENOTSUPP)
1595 				dev_warn(card->rtd[i].cpu_dai->dev,
1596 					 "ASoC: Failed to set DAI format: %d\n",
1597 					 ret);
1598 		}
1599 	}
1600 
1601 	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1602 		 "%s", card->name);
1603 	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1604 		 "%s", card->long_name ? card->long_name : card->name);
1605 	snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1606 		 "%s", card->driver_name ? card->driver_name : card->name);
1607 	for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1608 		switch (card->snd_card->driver[i]) {
1609 		case '_':
1610 		case '-':
1611 		case '\0':
1612 			break;
1613 		default:
1614 			if (!isalnum(card->snd_card->driver[i]))
1615 				card->snd_card->driver[i] = '_';
1616 			break;
1617 		}
1618 	}
1619 
1620 	if (card->late_probe) {
1621 		ret = card->late_probe(card);
1622 		if (ret < 0) {
1623 			dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1624 				card->name, ret);
1625 			goto probe_aux_dev_err;
1626 		}
1627 	}
1628 
1629 	snd_soc_dapm_new_widgets(card);
1630 
1631 	ret = snd_card_register(card->snd_card);
1632 	if (ret < 0) {
1633 		dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1634 				ret);
1635 		goto probe_aux_dev_err;
1636 	}
1637 
1638 	card->instantiated = 1;
1639 	snd_soc_dapm_sync(&card->dapm);
1640 	mutex_unlock(&card->mutex);
1641 
1642 	return 0;
1643 
1644 probe_aux_dev_err:
1645 	for (i = 0; i < card->num_aux_devs; i++)
1646 		soc_remove_aux_dev(card, i);
1647 
1648 probe_dai_err:
1649 	soc_remove_dai_links(card);
1650 
1651 card_probe_error:
1652 	if (card->remove)
1653 		card->remove(card);
1654 
1655 	snd_card_free(card->snd_card);
1656 
1657 base_error:
1658 	mutex_unlock(&card->mutex);
1659 
1660 	return ret;
1661 }
1662 
1663 /* probes a new socdev */
1664 static int soc_probe(struct platform_device *pdev)
1665 {
1666 	struct snd_soc_card *card = platform_get_drvdata(pdev);
1667 
1668 	/*
1669 	 * no card, so machine driver should be registering card
1670 	 * we should not be here in that case so ret error
1671 	 */
1672 	if (!card)
1673 		return -EINVAL;
1674 
1675 	dev_warn(&pdev->dev,
1676 		 "ASoC: machine %s should use snd_soc_register_card()\n",
1677 		 card->name);
1678 
1679 	/* Bodge while we unpick instantiation */
1680 	card->dev = &pdev->dev;
1681 
1682 	return snd_soc_register_card(card);
1683 }
1684 
1685 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1686 {
1687 	int i;
1688 
1689 	/* make sure any delayed work runs */
1690 	for (i = 0; i < card->num_rtd; i++) {
1691 		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1692 		flush_delayed_work(&rtd->delayed_work);
1693 	}
1694 
1695 	/* remove auxiliary devices */
1696 	for (i = 0; i < card->num_aux_devs; i++)
1697 		soc_remove_aux_dev(card, i);
1698 
1699 	/* remove and free each DAI */
1700 	soc_remove_dai_links(card);
1701 
1702 	soc_cleanup_card_debugfs(card);
1703 
1704 	/* remove the card */
1705 	if (card->remove)
1706 		card->remove(card);
1707 
1708 	snd_soc_dapm_free(&card->dapm);
1709 
1710 	snd_card_free(card->snd_card);
1711 	return 0;
1712 
1713 }
1714 
1715 /* removes a socdev */
1716 static int soc_remove(struct platform_device *pdev)
1717 {
1718 	struct snd_soc_card *card = platform_get_drvdata(pdev);
1719 
1720 	snd_soc_unregister_card(card);
1721 	return 0;
1722 }
1723 
1724 int snd_soc_poweroff(struct device *dev)
1725 {
1726 	struct snd_soc_card *card = dev_get_drvdata(dev);
1727 	int i;
1728 
1729 	if (!card->instantiated)
1730 		return 0;
1731 
1732 	/* Flush out pmdown_time work - we actually do want to run it
1733 	 * now, we're shutting down so no imminent restart. */
1734 	for (i = 0; i < card->num_rtd; i++) {
1735 		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1736 		flush_delayed_work(&rtd->delayed_work);
1737 	}
1738 
1739 	snd_soc_dapm_shutdown(card);
1740 
1741 	/* deactivate pins to sleep state */
1742 	for (i = 0; i < card->num_rtd; i++) {
1743 		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1744 		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1745 		int j;
1746 
1747 		pinctrl_pm_select_sleep_state(cpu_dai->dev);
1748 		for (j = 0; j < rtd->num_codecs; j++) {
1749 			struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1750 			pinctrl_pm_select_sleep_state(codec_dai->dev);
1751 		}
1752 	}
1753 
1754 	return 0;
1755 }
1756 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1757 
1758 const struct dev_pm_ops snd_soc_pm_ops = {
1759 	.suspend = snd_soc_suspend,
1760 	.resume = snd_soc_resume,
1761 	.freeze = snd_soc_suspend,
1762 	.thaw = snd_soc_resume,
1763 	.poweroff = snd_soc_poweroff,
1764 	.restore = snd_soc_resume,
1765 };
1766 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1767 
1768 /* ASoC platform driver */
1769 static struct platform_driver soc_driver = {
1770 	.driver		= {
1771 		.name		= "soc-audio",
1772 		.pm		= &snd_soc_pm_ops,
1773 	},
1774 	.probe		= soc_probe,
1775 	.remove		= soc_remove,
1776 };
1777 
1778 /**
1779  * snd_soc_cnew - create new control
1780  * @_template: control template
1781  * @data: control private data
1782  * @long_name: control long name
1783  * @prefix: control name prefix
1784  *
1785  * Create a new mixer control from a template control.
1786  *
1787  * Returns 0 for success, else error.
1788  */
1789 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1790 				  void *data, const char *long_name,
1791 				  const char *prefix)
1792 {
1793 	struct snd_kcontrol_new template;
1794 	struct snd_kcontrol *kcontrol;
1795 	char *name = NULL;
1796 
1797 	memcpy(&template, _template, sizeof(template));
1798 	template.index = 0;
1799 
1800 	if (!long_name)
1801 		long_name = template.name;
1802 
1803 	if (prefix) {
1804 		name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1805 		if (!name)
1806 			return NULL;
1807 
1808 		template.name = name;
1809 	} else {
1810 		template.name = long_name;
1811 	}
1812 
1813 	kcontrol = snd_ctl_new1(&template, data);
1814 
1815 	kfree(name);
1816 
1817 	return kcontrol;
1818 }
1819 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1820 
1821 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1822 	const struct snd_kcontrol_new *controls, int num_controls,
1823 	const char *prefix, void *data)
1824 {
1825 	int err, i;
1826 
1827 	for (i = 0; i < num_controls; i++) {
1828 		const struct snd_kcontrol_new *control = &controls[i];
1829 		err = snd_ctl_add(card, snd_soc_cnew(control, data,
1830 						     control->name, prefix));
1831 		if (err < 0) {
1832 			dev_err(dev, "ASoC: Failed to add %s: %d\n",
1833 				control->name, err);
1834 			return err;
1835 		}
1836 	}
1837 
1838 	return 0;
1839 }
1840 
1841 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1842 					       const char *name)
1843 {
1844 	struct snd_card *card = soc_card->snd_card;
1845 	struct snd_kcontrol *kctl;
1846 
1847 	if (unlikely(!name))
1848 		return NULL;
1849 
1850 	list_for_each_entry(kctl, &card->controls, list)
1851 		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1852 			return kctl;
1853 	return NULL;
1854 }
1855 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1856 
1857 /**
1858  * snd_soc_add_component_controls - Add an array of controls to a component.
1859  *
1860  * @component: Component to add controls to
1861  * @controls: Array of controls to add
1862  * @num_controls: Number of elements in the array
1863  *
1864  * Return: 0 for success, else error.
1865  */
1866 int snd_soc_add_component_controls(struct snd_soc_component *component,
1867 	const struct snd_kcontrol_new *controls, unsigned int num_controls)
1868 {
1869 	struct snd_card *card = component->card->snd_card;
1870 
1871 	return snd_soc_add_controls(card, component->dev, controls,
1872 			num_controls, component->name_prefix, component);
1873 }
1874 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1875 
1876 /**
1877  * snd_soc_add_codec_controls - add an array of controls to a codec.
1878  * Convenience function to add a list of controls. Many codecs were
1879  * duplicating this code.
1880  *
1881  * @codec: codec to add controls to
1882  * @controls: array of controls to add
1883  * @num_controls: number of elements in the array
1884  *
1885  * Return 0 for success, else error.
1886  */
1887 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1888 	const struct snd_kcontrol_new *controls, unsigned int num_controls)
1889 {
1890 	return snd_soc_add_component_controls(&codec->component, controls,
1891 		num_controls);
1892 }
1893 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1894 
1895 /**
1896  * snd_soc_add_platform_controls - add an array of controls to a platform.
1897  * Convenience function to add a list of controls.
1898  *
1899  * @platform: platform to add controls to
1900  * @controls: array of controls to add
1901  * @num_controls: number of elements in the array
1902  *
1903  * Return 0 for success, else error.
1904  */
1905 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1906 	const struct snd_kcontrol_new *controls, unsigned int num_controls)
1907 {
1908 	return snd_soc_add_component_controls(&platform->component, controls,
1909 		num_controls);
1910 }
1911 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1912 
1913 /**
1914  * snd_soc_add_card_controls - add an array of controls to a SoC card.
1915  * Convenience function to add a list of controls.
1916  *
1917  * @soc_card: SoC card to add controls to
1918  * @controls: array of controls to add
1919  * @num_controls: number of elements in the array
1920  *
1921  * Return 0 for success, else error.
1922  */
1923 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1924 	const struct snd_kcontrol_new *controls, int num_controls)
1925 {
1926 	struct snd_card *card = soc_card->snd_card;
1927 
1928 	return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1929 			NULL, soc_card);
1930 }
1931 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1932 
1933 /**
1934  * snd_soc_add_dai_controls - add an array of controls to a DAI.
1935  * Convienience function to add a list of controls.
1936  *
1937  * @dai: DAI to add controls to
1938  * @controls: array of controls to add
1939  * @num_controls: number of elements in the array
1940  *
1941  * Return 0 for success, else error.
1942  */
1943 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
1944 	const struct snd_kcontrol_new *controls, int num_controls)
1945 {
1946 	struct snd_card *card = dai->component->card->snd_card;
1947 
1948 	return snd_soc_add_controls(card, dai->dev, controls, num_controls,
1949 			NULL, dai);
1950 }
1951 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
1952 
1953 /**
1954  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1955  * @dai: DAI
1956  * @clk_id: DAI specific clock ID
1957  * @freq: new clock frequency in Hz
1958  * @dir: new clock direction - input/output.
1959  *
1960  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1961  */
1962 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1963 	unsigned int freq, int dir)
1964 {
1965 	if (dai->driver && dai->driver->ops->set_sysclk)
1966 		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
1967 	else if (dai->codec && dai->codec->driver->set_sysclk)
1968 		return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
1969 						      freq, dir);
1970 	else
1971 		return -ENOTSUPP;
1972 }
1973 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
1974 
1975 /**
1976  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
1977  * @codec: CODEC
1978  * @clk_id: DAI specific clock ID
1979  * @source: Source for the clock
1980  * @freq: new clock frequency in Hz
1981  * @dir: new clock direction - input/output.
1982  *
1983  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
1984  */
1985 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
1986 			     int source, unsigned int freq, int dir)
1987 {
1988 	if (codec->driver->set_sysclk)
1989 		return codec->driver->set_sysclk(codec, clk_id, source,
1990 						 freq, dir);
1991 	else
1992 		return -ENOTSUPP;
1993 }
1994 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
1995 
1996 /**
1997  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
1998  * @dai: DAI
1999  * @div_id: DAI specific clock divider ID
2000  * @div: new clock divisor.
2001  *
2002  * Configures the clock dividers. This is used to derive the best DAI bit and
2003  * frame clocks from the system or master clock. It's best to set the DAI bit
2004  * and frame clocks as low as possible to save system power.
2005  */
2006 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2007 	int div_id, int div)
2008 {
2009 	if (dai->driver && dai->driver->ops->set_clkdiv)
2010 		return dai->driver->ops->set_clkdiv(dai, div_id, div);
2011 	else
2012 		return -EINVAL;
2013 }
2014 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2015 
2016 /**
2017  * snd_soc_dai_set_pll - configure DAI PLL.
2018  * @dai: DAI
2019  * @pll_id: DAI specific PLL ID
2020  * @source: DAI specific source for the PLL
2021  * @freq_in: PLL input clock frequency in Hz
2022  * @freq_out: requested PLL output clock frequency in Hz
2023  *
2024  * Configures and enables PLL to generate output clock based on input clock.
2025  */
2026 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2027 	unsigned int freq_in, unsigned int freq_out)
2028 {
2029 	if (dai->driver && dai->driver->ops->set_pll)
2030 		return dai->driver->ops->set_pll(dai, pll_id, source,
2031 					 freq_in, freq_out);
2032 	else if (dai->codec && dai->codec->driver->set_pll)
2033 		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2034 						   freq_in, freq_out);
2035 	else
2036 		return -EINVAL;
2037 }
2038 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2039 
2040 /*
2041  * snd_soc_codec_set_pll - configure codec PLL.
2042  * @codec: CODEC
2043  * @pll_id: DAI specific PLL ID
2044  * @source: DAI specific source for the PLL
2045  * @freq_in: PLL input clock frequency in Hz
2046  * @freq_out: requested PLL output clock frequency in Hz
2047  *
2048  * Configures and enables PLL to generate output clock based on input clock.
2049  */
2050 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2051 			  unsigned int freq_in, unsigned int freq_out)
2052 {
2053 	if (codec->driver->set_pll)
2054 		return codec->driver->set_pll(codec, pll_id, source,
2055 					      freq_in, freq_out);
2056 	else
2057 		return -EINVAL;
2058 }
2059 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2060 
2061 /**
2062  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2063  * @dai: DAI
2064  * @ratio Ratio of BCLK to Sample rate.
2065  *
2066  * Configures the DAI for a preset BCLK to sample rate ratio.
2067  */
2068 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2069 {
2070 	if (dai->driver && dai->driver->ops->set_bclk_ratio)
2071 		return dai->driver->ops->set_bclk_ratio(dai, ratio);
2072 	else
2073 		return -EINVAL;
2074 }
2075 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2076 
2077 /**
2078  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2079  * @dai: DAI
2080  * @fmt: SND_SOC_DAIFMT_ format value.
2081  *
2082  * Configures the DAI hardware format and clocking.
2083  */
2084 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2085 {
2086 	if (dai->driver == NULL)
2087 		return -EINVAL;
2088 	if (dai->driver->ops->set_fmt == NULL)
2089 		return -ENOTSUPP;
2090 	return dai->driver->ops->set_fmt(dai, fmt);
2091 }
2092 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2093 
2094 /**
2095  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2096  * @slots: Number of slots in use.
2097  * @tx_mask: bitmask representing active TX slots.
2098  * @rx_mask: bitmask representing active RX slots.
2099  *
2100  * Generates the TDM tx and rx slot default masks for DAI.
2101  */
2102 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2103 					  unsigned int *tx_mask,
2104 					  unsigned int *rx_mask)
2105 {
2106 	if (*tx_mask || *rx_mask)
2107 		return 0;
2108 
2109 	if (!slots)
2110 		return -EINVAL;
2111 
2112 	*tx_mask = (1 << slots) - 1;
2113 	*rx_mask = (1 << slots) - 1;
2114 
2115 	return 0;
2116 }
2117 
2118 /**
2119  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2120  * @dai: DAI
2121  * @tx_mask: bitmask representing active TX slots.
2122  * @rx_mask: bitmask representing active RX slots.
2123  * @slots: Number of slots in use.
2124  * @slot_width: Width in bits for each slot.
2125  *
2126  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2127  * specific.
2128  */
2129 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2130 	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2131 {
2132 	if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2133 		dai->driver->ops->xlate_tdm_slot_mask(slots,
2134 						&tx_mask, &rx_mask);
2135 	else
2136 		snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2137 
2138 	dai->tx_mask = tx_mask;
2139 	dai->rx_mask = rx_mask;
2140 
2141 	if (dai->driver && dai->driver->ops->set_tdm_slot)
2142 		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2143 				slots, slot_width);
2144 	else
2145 		return -ENOTSUPP;
2146 }
2147 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2148 
2149 /**
2150  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2151  * @dai: DAI
2152  * @tx_num: how many TX channels
2153  * @tx_slot: pointer to an array which imply the TX slot number channel
2154  *           0~num-1 uses
2155  * @rx_num: how many RX channels
2156  * @rx_slot: pointer to an array which imply the RX slot number channel
2157  *           0~num-1 uses
2158  *
2159  * configure the relationship between channel number and TDM slot number.
2160  */
2161 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2162 	unsigned int tx_num, unsigned int *tx_slot,
2163 	unsigned int rx_num, unsigned int *rx_slot)
2164 {
2165 	if (dai->driver && dai->driver->ops->set_channel_map)
2166 		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2167 			rx_num, rx_slot);
2168 	else
2169 		return -EINVAL;
2170 }
2171 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2172 
2173 /**
2174  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2175  * @dai: DAI
2176  * @tristate: tristate enable
2177  *
2178  * Tristates the DAI so that others can use it.
2179  */
2180 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2181 {
2182 	if (dai->driver && dai->driver->ops->set_tristate)
2183 		return dai->driver->ops->set_tristate(dai, tristate);
2184 	else
2185 		return -EINVAL;
2186 }
2187 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2188 
2189 /**
2190  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2191  * @dai: DAI
2192  * @mute: mute enable
2193  * @direction: stream to mute
2194  *
2195  * Mutes the DAI DAC.
2196  */
2197 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2198 			     int direction)
2199 {
2200 	if (!dai->driver)
2201 		return -ENOTSUPP;
2202 
2203 	if (dai->driver->ops->mute_stream)
2204 		return dai->driver->ops->mute_stream(dai, mute, direction);
2205 	else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2206 		 dai->driver->ops->digital_mute)
2207 		return dai->driver->ops->digital_mute(dai, mute);
2208 	else
2209 		return -ENOTSUPP;
2210 }
2211 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2212 
2213 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2214 				   struct snd_soc_dai_link *dai_link)
2215 {
2216 	/* Legacy codec/codec_dai link is a single entry in multicodec */
2217 	if (dai_link->codec_name || dai_link->codec_of_node ||
2218 	    dai_link->codec_dai_name) {
2219 		dai_link->num_codecs = 1;
2220 
2221 		dai_link->codecs = devm_kzalloc(card->dev,
2222 				sizeof(struct snd_soc_dai_link_component),
2223 				GFP_KERNEL);
2224 		if (!dai_link->codecs)
2225 			return -ENOMEM;
2226 
2227 		dai_link->codecs[0].name = dai_link->codec_name;
2228 		dai_link->codecs[0].of_node = dai_link->codec_of_node;
2229 		dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2230 	}
2231 
2232 	if (!dai_link->codecs) {
2233 		dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2234 		return -EINVAL;
2235 	}
2236 
2237 	return 0;
2238 }
2239 
2240 /**
2241  * snd_soc_register_card - Register a card with the ASoC core
2242  *
2243  * @card: Card to register
2244  *
2245  */
2246 int snd_soc_register_card(struct snd_soc_card *card)
2247 {
2248 	int i, j, ret;
2249 
2250 	if (!card->name || !card->dev)
2251 		return -EINVAL;
2252 
2253 	for (i = 0; i < card->num_links; i++) {
2254 		struct snd_soc_dai_link *link = &card->dai_link[i];
2255 
2256 		ret = snd_soc_init_multicodec(card, link);
2257 		if (ret) {
2258 			dev_err(card->dev, "ASoC: failed to init multicodec\n");
2259 			return ret;
2260 		}
2261 
2262 		for (j = 0; j < link->num_codecs; j++) {
2263 			/*
2264 			 * Codec must be specified by 1 of name or OF node,
2265 			 * not both or neither.
2266 			 */
2267 			if (!!link->codecs[j].name ==
2268 			    !!link->codecs[j].of_node) {
2269 				dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2270 					link->name);
2271 				return -EINVAL;
2272 			}
2273 			/* Codec DAI name must be specified */
2274 			if (!link->codecs[j].dai_name) {
2275 				dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2276 					link->name);
2277 				return -EINVAL;
2278 			}
2279 		}
2280 
2281 		/*
2282 		 * Platform may be specified by either name or OF node, but
2283 		 * can be left unspecified, and a dummy platform will be used.
2284 		 */
2285 		if (link->platform_name && link->platform_of_node) {
2286 			dev_err(card->dev,
2287 				"ASoC: Both platform name/of_node are set for %s\n",
2288 				link->name);
2289 			return -EINVAL;
2290 		}
2291 
2292 		/*
2293 		 * CPU device may be specified by either name or OF node, but
2294 		 * can be left unspecified, and will be matched based on DAI
2295 		 * name alone..
2296 		 */
2297 		if (link->cpu_name && link->cpu_of_node) {
2298 			dev_err(card->dev,
2299 				"ASoC: Neither/both cpu name/of_node are set for %s\n",
2300 				link->name);
2301 			return -EINVAL;
2302 		}
2303 		/*
2304 		 * At least one of CPU DAI name or CPU device name/node must be
2305 		 * specified
2306 		 */
2307 		if (!link->cpu_dai_name &&
2308 		    !(link->cpu_name || link->cpu_of_node)) {
2309 			dev_err(card->dev,
2310 				"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2311 				link->name);
2312 			return -EINVAL;
2313 		}
2314 	}
2315 
2316 	dev_set_drvdata(card->dev, card);
2317 
2318 	snd_soc_initialize_card_lists(card);
2319 
2320 	soc_init_card_debugfs(card);
2321 
2322 	card->rtd = devm_kzalloc(card->dev,
2323 				 sizeof(struct snd_soc_pcm_runtime) *
2324 				 (card->num_links + card->num_aux_devs),
2325 				 GFP_KERNEL);
2326 	if (card->rtd == NULL)
2327 		return -ENOMEM;
2328 	card->num_rtd = 0;
2329 	card->rtd_aux = &card->rtd[card->num_links];
2330 
2331 	for (i = 0; i < card->num_links; i++) {
2332 		card->rtd[i].card = card;
2333 		card->rtd[i].dai_link = &card->dai_link[i];
2334 		card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2335 					sizeof(struct snd_soc_dai *) *
2336 					(card->rtd[i].dai_link->num_codecs),
2337 					GFP_KERNEL);
2338 		if (card->rtd[i].codec_dais == NULL)
2339 			return -ENOMEM;
2340 	}
2341 
2342 	for (i = 0; i < card->num_aux_devs; i++)
2343 		card->rtd_aux[i].card = card;
2344 
2345 	INIT_LIST_HEAD(&card->dapm_dirty);
2346 	card->instantiated = 0;
2347 	mutex_init(&card->mutex);
2348 	mutex_init(&card->dapm_mutex);
2349 
2350 	ret = snd_soc_instantiate_card(card);
2351 	if (ret != 0)
2352 		soc_cleanup_card_debugfs(card);
2353 
2354 	/* deactivate pins to sleep state */
2355 	for (i = 0; i < card->num_rtd; i++) {
2356 		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2357 		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2358 		int j;
2359 
2360 		for (j = 0; j < rtd->num_codecs; j++) {
2361 			struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2362 			if (!codec_dai->active)
2363 				pinctrl_pm_select_sleep_state(codec_dai->dev);
2364 		}
2365 
2366 		if (!cpu_dai->active)
2367 			pinctrl_pm_select_sleep_state(cpu_dai->dev);
2368 	}
2369 
2370 	return ret;
2371 }
2372 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2373 
2374 /**
2375  * snd_soc_unregister_card - Unregister a card with the ASoC core
2376  *
2377  * @card: Card to unregister
2378  *
2379  */
2380 int snd_soc_unregister_card(struct snd_soc_card *card)
2381 {
2382 	if (card->instantiated) {
2383 		card->instantiated = false;
2384 		snd_soc_dapm_shutdown(card);
2385 		soc_cleanup_card_resources(card);
2386 	}
2387 	dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2388 
2389 	return 0;
2390 }
2391 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2392 
2393 /*
2394  * Simplify DAI link configuration by removing ".-1" from device names
2395  * and sanitizing names.
2396  */
2397 static char *fmt_single_name(struct device *dev, int *id)
2398 {
2399 	char *found, name[NAME_SIZE];
2400 	int id1, id2;
2401 
2402 	if (dev_name(dev) == NULL)
2403 		return NULL;
2404 
2405 	strlcpy(name, dev_name(dev), NAME_SIZE);
2406 
2407 	/* are we a "%s.%d" name (platform and SPI components) */
2408 	found = strstr(name, dev->driver->name);
2409 	if (found) {
2410 		/* get ID */
2411 		if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2412 
2413 			/* discard ID from name if ID == -1 */
2414 			if (*id == -1)
2415 				found[strlen(dev->driver->name)] = '\0';
2416 		}
2417 
2418 	} else {
2419 		/* I2C component devices are named "bus-addr"  */
2420 		if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2421 			char tmp[NAME_SIZE];
2422 
2423 			/* create unique ID number from I2C addr and bus */
2424 			*id = ((id1 & 0xffff) << 16) + id2;
2425 
2426 			/* sanitize component name for DAI link creation */
2427 			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2428 			strlcpy(name, tmp, NAME_SIZE);
2429 		} else
2430 			*id = 0;
2431 	}
2432 
2433 	return kstrdup(name, GFP_KERNEL);
2434 }
2435 
2436 /*
2437  * Simplify DAI link naming for single devices with multiple DAIs by removing
2438  * any ".-1" and using the DAI name (instead of device name).
2439  */
2440 static inline char *fmt_multiple_name(struct device *dev,
2441 		struct snd_soc_dai_driver *dai_drv)
2442 {
2443 	if (dai_drv->name == NULL) {
2444 		dev_err(dev,
2445 			"ASoC: error - multiple DAI %s registered with no name\n",
2446 			dev_name(dev));
2447 		return NULL;
2448 	}
2449 
2450 	return kstrdup(dai_drv->name, GFP_KERNEL);
2451 }
2452 
2453 /**
2454  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2455  *
2456  * @component: The component for which the DAIs should be unregistered
2457  */
2458 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2459 {
2460 	struct snd_soc_dai *dai, *_dai;
2461 
2462 	list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2463 		dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2464 			dai->name);
2465 		list_del(&dai->list);
2466 		kfree(dai->name);
2467 		kfree(dai);
2468 	}
2469 }
2470 
2471 /**
2472  * snd_soc_register_dais - Register a DAI with the ASoC core
2473  *
2474  * @component: The component the DAIs are registered for
2475  * @dai_drv: DAI driver to use for the DAIs
2476  * @count: Number of DAIs
2477  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2478  *                     parent's name.
2479  */
2480 static int snd_soc_register_dais(struct snd_soc_component *component,
2481 	struct snd_soc_dai_driver *dai_drv, size_t count,
2482 	bool legacy_dai_naming)
2483 {
2484 	struct device *dev = component->dev;
2485 	struct snd_soc_dai *dai;
2486 	unsigned int i;
2487 	int ret;
2488 
2489 	dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2490 
2491 	component->dai_drv = dai_drv;
2492 	component->num_dai = count;
2493 
2494 	for (i = 0; i < count; i++) {
2495 
2496 		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2497 		if (dai == NULL) {
2498 			ret = -ENOMEM;
2499 			goto err;
2500 		}
2501 
2502 		/*
2503 		 * Back in the old days when we still had component-less DAIs,
2504 		 * instead of having a static name, component-less DAIs would
2505 		 * inherit the name of the parent device so it is possible to
2506 		 * register multiple instances of the DAI. We still need to keep
2507 		 * the same naming style even though those DAIs are not
2508 		 * component-less anymore.
2509 		 */
2510 		if (count == 1 && legacy_dai_naming) {
2511 			dai->name = fmt_single_name(dev, &dai->id);
2512 		} else {
2513 			dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2514 			if (dai_drv[i].id)
2515 				dai->id = dai_drv[i].id;
2516 			else
2517 				dai->id = i;
2518 		}
2519 		if (dai->name == NULL) {
2520 			kfree(dai);
2521 			ret = -ENOMEM;
2522 			goto err;
2523 		}
2524 
2525 		dai->component = component;
2526 		dai->dev = dev;
2527 		dai->driver = &dai_drv[i];
2528 		if (!dai->driver->ops)
2529 			dai->driver->ops = &null_dai_ops;
2530 
2531 		list_add(&dai->list, &component->dai_list);
2532 
2533 		dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2534 	}
2535 
2536 	return 0;
2537 
2538 err:
2539 	snd_soc_unregister_dais(component);
2540 
2541 	return ret;
2542 }
2543 
2544 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2545 	enum snd_soc_dapm_type type, int subseq)
2546 {
2547 	struct snd_soc_component *component = dapm->component;
2548 
2549 	component->driver->seq_notifier(component, type, subseq);
2550 }
2551 
2552 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2553 	int event)
2554 {
2555 	struct snd_soc_component *component = dapm->component;
2556 
2557 	return component->driver->stream_event(component, event);
2558 }
2559 
2560 static int snd_soc_component_initialize(struct snd_soc_component *component,
2561 	const struct snd_soc_component_driver *driver, struct device *dev)
2562 {
2563 	struct snd_soc_dapm_context *dapm;
2564 
2565 	component->name = fmt_single_name(dev, &component->id);
2566 	if (!component->name) {
2567 		dev_err(dev, "ASoC: Failed to allocate name\n");
2568 		return -ENOMEM;
2569 	}
2570 
2571 	component->dev = dev;
2572 	component->driver = driver;
2573 	component->probe = component->driver->probe;
2574 	component->remove = component->driver->remove;
2575 
2576 	if (!component->dapm_ptr)
2577 		component->dapm_ptr = &component->dapm;
2578 
2579 	dapm = component->dapm_ptr;
2580 	dapm->dev = dev;
2581 	dapm->component = component;
2582 	dapm->bias_level = SND_SOC_BIAS_OFF;
2583 	dapm->idle_bias_off = true;
2584 	if (driver->seq_notifier)
2585 		dapm->seq_notifier = snd_soc_component_seq_notifier;
2586 	if (driver->stream_event)
2587 		dapm->stream_event = snd_soc_component_stream_event;
2588 
2589 	component->controls = driver->controls;
2590 	component->num_controls = driver->num_controls;
2591 	component->dapm_widgets = driver->dapm_widgets;
2592 	component->num_dapm_widgets = driver->num_dapm_widgets;
2593 	component->dapm_routes = driver->dapm_routes;
2594 	component->num_dapm_routes = driver->num_dapm_routes;
2595 
2596 	INIT_LIST_HEAD(&component->dai_list);
2597 	mutex_init(&component->io_mutex);
2598 
2599 	return 0;
2600 }
2601 
2602 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2603 {
2604 	int val_bytes = regmap_get_val_bytes(component->regmap);
2605 
2606 	/* Errors are legitimate for non-integer byte multiples */
2607 	if (val_bytes > 0)
2608 		component->val_bytes = val_bytes;
2609 }
2610 
2611 #ifdef CONFIG_REGMAP
2612 
2613 /**
2614  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2615  * @component: The component for which to initialize the regmap instance
2616  * @regmap: The regmap instance that should be used by the component
2617  *
2618  * This function allows deferred assignment of the regmap instance that is
2619  * associated with the component. Only use this if the regmap instance is not
2620  * yet ready when the component is registered. The function must also be called
2621  * before the first IO attempt of the component.
2622  */
2623 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2624 	struct regmap *regmap)
2625 {
2626 	component->regmap = regmap;
2627 	snd_soc_component_setup_regmap(component);
2628 }
2629 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2630 
2631 /**
2632  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2633  * @component: The component for which to de-initialize the regmap instance
2634  *
2635  * Calls regmap_exit() on the regmap instance associated to the component and
2636  * removes the regmap instance from the component.
2637  *
2638  * This function should only be used if snd_soc_component_init_regmap() was used
2639  * to initialize the regmap instance.
2640  */
2641 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2642 {
2643 	regmap_exit(component->regmap);
2644 	component->regmap = NULL;
2645 }
2646 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2647 
2648 #endif
2649 
2650 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2651 {
2652 	if (!component->write && !component->read) {
2653 		if (!component->regmap)
2654 			component->regmap = dev_get_regmap(component->dev, NULL);
2655 		if (component->regmap)
2656 			snd_soc_component_setup_regmap(component);
2657 	}
2658 
2659 	list_add(&component->list, &component_list);
2660 }
2661 
2662 static void snd_soc_component_add(struct snd_soc_component *component)
2663 {
2664 	mutex_lock(&client_mutex);
2665 	snd_soc_component_add_unlocked(component);
2666 	mutex_unlock(&client_mutex);
2667 }
2668 
2669 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2670 {
2671 	snd_soc_unregister_dais(component);
2672 	kfree(component->name);
2673 }
2674 
2675 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2676 {
2677 	list_del(&component->list);
2678 }
2679 
2680 static void snd_soc_component_del(struct snd_soc_component *component)
2681 {
2682 	mutex_lock(&client_mutex);
2683 	snd_soc_component_del_unlocked(component);
2684 	mutex_unlock(&client_mutex);
2685 }
2686 
2687 int snd_soc_register_component(struct device *dev,
2688 			       const struct snd_soc_component_driver *cmpnt_drv,
2689 			       struct snd_soc_dai_driver *dai_drv,
2690 			       int num_dai)
2691 {
2692 	struct snd_soc_component *cmpnt;
2693 	int ret;
2694 
2695 	cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2696 	if (!cmpnt) {
2697 		dev_err(dev, "ASoC: Failed to allocate memory\n");
2698 		return -ENOMEM;
2699 	}
2700 
2701 	ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2702 	if (ret)
2703 		goto err_free;
2704 
2705 	cmpnt->ignore_pmdown_time = true;
2706 	cmpnt->registered_as_component = true;
2707 
2708 	ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2709 	if (ret < 0) {
2710 		dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2711 		goto err_cleanup;
2712 	}
2713 
2714 	snd_soc_component_add(cmpnt);
2715 
2716 	return 0;
2717 
2718 err_cleanup:
2719 	snd_soc_component_cleanup(cmpnt);
2720 err_free:
2721 	kfree(cmpnt);
2722 	return ret;
2723 }
2724 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2725 
2726 /**
2727  * snd_soc_unregister_component - Unregister a component from the ASoC core
2728  *
2729  */
2730 void snd_soc_unregister_component(struct device *dev)
2731 {
2732 	struct snd_soc_component *cmpnt;
2733 
2734 	list_for_each_entry(cmpnt, &component_list, list) {
2735 		if (dev == cmpnt->dev && cmpnt->registered_as_component)
2736 			goto found;
2737 	}
2738 	return;
2739 
2740 found:
2741 	snd_soc_component_del(cmpnt);
2742 	snd_soc_component_cleanup(cmpnt);
2743 	kfree(cmpnt);
2744 }
2745 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2746 
2747 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2748 {
2749 	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2750 
2751 	return platform->driver->probe(platform);
2752 }
2753 
2754 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2755 {
2756 	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2757 
2758 	platform->driver->remove(platform);
2759 }
2760 
2761 /**
2762  * snd_soc_add_platform - Add a platform to the ASoC core
2763  * @dev: The parent device for the platform
2764  * @platform: The platform to add
2765  * @platform_driver: The driver for the platform
2766  */
2767 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2768 		const struct snd_soc_platform_driver *platform_drv)
2769 {
2770 	int ret;
2771 
2772 	ret = snd_soc_component_initialize(&platform->component,
2773 			&platform_drv->component_driver, dev);
2774 	if (ret)
2775 		return ret;
2776 
2777 	platform->dev = dev;
2778 	platform->driver = platform_drv;
2779 
2780 	if (platform_drv->probe)
2781 		platform->component.probe = snd_soc_platform_drv_probe;
2782 	if (platform_drv->remove)
2783 		platform->component.remove = snd_soc_platform_drv_remove;
2784 
2785 #ifdef CONFIG_DEBUG_FS
2786 	platform->component.debugfs_prefix = "platform";
2787 #endif
2788 
2789 	mutex_lock(&client_mutex);
2790 	snd_soc_component_add_unlocked(&platform->component);
2791 	list_add(&platform->list, &platform_list);
2792 	mutex_unlock(&client_mutex);
2793 
2794 	dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2795 		platform->component.name);
2796 
2797 	return 0;
2798 }
2799 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2800 
2801 /**
2802  * snd_soc_register_platform - Register a platform with the ASoC core
2803  *
2804  * @platform: platform to register
2805  */
2806 int snd_soc_register_platform(struct device *dev,
2807 		const struct snd_soc_platform_driver *platform_drv)
2808 {
2809 	struct snd_soc_platform *platform;
2810 	int ret;
2811 
2812 	dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2813 
2814 	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2815 	if (platform == NULL)
2816 		return -ENOMEM;
2817 
2818 	ret = snd_soc_add_platform(dev, platform, platform_drv);
2819 	if (ret)
2820 		kfree(platform);
2821 
2822 	return ret;
2823 }
2824 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2825 
2826 /**
2827  * snd_soc_remove_platform - Remove a platform from the ASoC core
2828  * @platform: the platform to remove
2829  */
2830 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2831 {
2832 
2833 	mutex_lock(&client_mutex);
2834 	list_del(&platform->list);
2835 	snd_soc_component_del_unlocked(&platform->component);
2836 	mutex_unlock(&client_mutex);
2837 
2838 	dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2839 		platform->component.name);
2840 
2841 	snd_soc_component_cleanup(&platform->component);
2842 }
2843 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2844 
2845 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2846 {
2847 	struct snd_soc_platform *platform;
2848 
2849 	list_for_each_entry(platform, &platform_list, list) {
2850 		if (dev == platform->dev)
2851 			return platform;
2852 	}
2853 
2854 	return NULL;
2855 }
2856 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2857 
2858 /**
2859  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2860  *
2861  * @platform: platform to unregister
2862  */
2863 void snd_soc_unregister_platform(struct device *dev)
2864 {
2865 	struct snd_soc_platform *platform;
2866 
2867 	platform = snd_soc_lookup_platform(dev);
2868 	if (!platform)
2869 		return;
2870 
2871 	snd_soc_remove_platform(platform);
2872 	kfree(platform);
2873 }
2874 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2875 
2876 static u64 codec_format_map[] = {
2877 	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2878 	SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2879 	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2880 	SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2881 	SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2882 	SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2883 	SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2884 	SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2885 	SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2886 	SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2887 	SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2888 	SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2889 	SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2890 	SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2891 	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2892 	| SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2893 };
2894 
2895 /* Fix up the DAI formats for endianness: codecs don't actually see
2896  * the endianness of the data but we're using the CPU format
2897  * definitions which do need to include endianness so we ensure that
2898  * codec DAIs always have both big and little endian variants set.
2899  */
2900 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2901 {
2902 	int i;
2903 
2904 	for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2905 		if (stream->formats & codec_format_map[i])
2906 			stream->formats |= codec_format_map[i];
2907 }
2908 
2909 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2910 {
2911 	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2912 
2913 	return codec->driver->probe(codec);
2914 }
2915 
2916 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2917 {
2918 	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2919 
2920 	codec->driver->remove(codec);
2921 }
2922 
2923 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
2924 	unsigned int reg, unsigned int val)
2925 {
2926 	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2927 
2928 	return codec->driver->write(codec, reg, val);
2929 }
2930 
2931 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
2932 	unsigned int reg, unsigned int *val)
2933 {
2934 	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2935 
2936 	*val = codec->driver->read(codec, reg);
2937 
2938 	return 0;
2939 }
2940 
2941 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
2942 	enum snd_soc_bias_level level)
2943 {
2944 	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
2945 
2946 	return codec->driver->set_bias_level(codec, level);
2947 }
2948 
2949 /**
2950  * snd_soc_register_codec - Register a codec with the ASoC core
2951  *
2952  * @codec: codec to register
2953  */
2954 int snd_soc_register_codec(struct device *dev,
2955 			   const struct snd_soc_codec_driver *codec_drv,
2956 			   struct snd_soc_dai_driver *dai_drv,
2957 			   int num_dai)
2958 {
2959 	struct snd_soc_codec *codec;
2960 	struct snd_soc_dai *dai;
2961 	int ret, i;
2962 
2963 	dev_dbg(dev, "codec register %s\n", dev_name(dev));
2964 
2965 	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
2966 	if (codec == NULL)
2967 		return -ENOMEM;
2968 
2969 	codec->component.dapm_ptr = &codec->dapm;
2970 	codec->component.codec = codec;
2971 
2972 	ret = snd_soc_component_initialize(&codec->component,
2973 			&codec_drv->component_driver, dev);
2974 	if (ret)
2975 		goto err_free;
2976 
2977 	if (codec_drv->controls) {
2978 		codec->component.controls = codec_drv->controls;
2979 		codec->component.num_controls = codec_drv->num_controls;
2980 	}
2981 	if (codec_drv->dapm_widgets) {
2982 		codec->component.dapm_widgets = codec_drv->dapm_widgets;
2983 		codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
2984 	}
2985 	if (codec_drv->dapm_routes) {
2986 		codec->component.dapm_routes = codec_drv->dapm_routes;
2987 		codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
2988 	}
2989 
2990 	if (codec_drv->probe)
2991 		codec->component.probe = snd_soc_codec_drv_probe;
2992 	if (codec_drv->remove)
2993 		codec->component.remove = snd_soc_codec_drv_remove;
2994 	if (codec_drv->write)
2995 		codec->component.write = snd_soc_codec_drv_write;
2996 	if (codec_drv->read)
2997 		codec->component.read = snd_soc_codec_drv_read;
2998 	codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
2999 	codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3000 	codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3001 	if (codec_drv->seq_notifier)
3002 		codec->dapm.seq_notifier = codec_drv->seq_notifier;
3003 	if (codec_drv->set_bias_level)
3004 		codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3005 	codec->dev = dev;
3006 	codec->driver = codec_drv;
3007 	codec->component.val_bytes = codec_drv->reg_word_size;
3008 
3009 #ifdef CONFIG_DEBUG_FS
3010 	codec->component.init_debugfs = soc_init_codec_debugfs;
3011 	codec->component.debugfs_prefix = "codec";
3012 #endif
3013 
3014 	if (codec_drv->get_regmap)
3015 		codec->component.regmap = codec_drv->get_regmap(dev);
3016 
3017 	for (i = 0; i < num_dai; i++) {
3018 		fixup_codec_formats(&dai_drv[i].playback);
3019 		fixup_codec_formats(&dai_drv[i].capture);
3020 	}
3021 
3022 	ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3023 	if (ret < 0) {
3024 		dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3025 		goto err_cleanup;
3026 	}
3027 
3028 	list_for_each_entry(dai, &codec->component.dai_list, list)
3029 		dai->codec = codec;
3030 
3031 	mutex_lock(&client_mutex);
3032 	snd_soc_component_add_unlocked(&codec->component);
3033 	list_add(&codec->list, &codec_list);
3034 	mutex_unlock(&client_mutex);
3035 
3036 	dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3037 		codec->component.name);
3038 	return 0;
3039 
3040 err_cleanup:
3041 	snd_soc_component_cleanup(&codec->component);
3042 err_free:
3043 	kfree(codec);
3044 	return ret;
3045 }
3046 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3047 
3048 /**
3049  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3050  *
3051  * @codec: codec to unregister
3052  */
3053 void snd_soc_unregister_codec(struct device *dev)
3054 {
3055 	struct snd_soc_codec *codec;
3056 
3057 	list_for_each_entry(codec, &codec_list, list) {
3058 		if (dev == codec->dev)
3059 			goto found;
3060 	}
3061 	return;
3062 
3063 found:
3064 
3065 	mutex_lock(&client_mutex);
3066 	list_del(&codec->list);
3067 	snd_soc_component_del_unlocked(&codec->component);
3068 	mutex_unlock(&client_mutex);
3069 
3070 	dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3071 			codec->component.name);
3072 
3073 	snd_soc_component_cleanup(&codec->component);
3074 	snd_soc_cache_exit(codec);
3075 	kfree(codec);
3076 }
3077 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3078 
3079 /* Retrieve a card's name from device tree */
3080 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3081 			       const char *propname)
3082 {
3083 	struct device_node *np;
3084 	int ret;
3085 
3086 	if (!card->dev) {
3087 		pr_err("card->dev is not set before calling %s\n", __func__);
3088 		return -EINVAL;
3089 	}
3090 
3091 	np = card->dev->of_node;
3092 
3093 	ret = of_property_read_string_index(np, propname, 0, &card->name);
3094 	/*
3095 	 * EINVAL means the property does not exist. This is fine providing
3096 	 * card->name was previously set, which is checked later in
3097 	 * snd_soc_register_card.
3098 	 */
3099 	if (ret < 0 && ret != -EINVAL) {
3100 		dev_err(card->dev,
3101 			"ASoC: Property '%s' could not be read: %d\n",
3102 			propname, ret);
3103 		return ret;
3104 	}
3105 
3106 	return 0;
3107 }
3108 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3109 
3110 static const struct snd_soc_dapm_widget simple_widgets[] = {
3111 	SND_SOC_DAPM_MIC("Microphone", NULL),
3112 	SND_SOC_DAPM_LINE("Line", NULL),
3113 	SND_SOC_DAPM_HP("Headphone", NULL),
3114 	SND_SOC_DAPM_SPK("Speaker", NULL),
3115 };
3116 
3117 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3118 					  const char *propname)
3119 {
3120 	struct device_node *np = card->dev->of_node;
3121 	struct snd_soc_dapm_widget *widgets;
3122 	const char *template, *wname;
3123 	int i, j, num_widgets, ret;
3124 
3125 	num_widgets = of_property_count_strings(np, propname);
3126 	if (num_widgets < 0) {
3127 		dev_err(card->dev,
3128 			"ASoC: Property '%s' does not exist\n",	propname);
3129 		return -EINVAL;
3130 	}
3131 	if (num_widgets & 1) {
3132 		dev_err(card->dev,
3133 			"ASoC: Property '%s' length is not even\n", propname);
3134 		return -EINVAL;
3135 	}
3136 
3137 	num_widgets /= 2;
3138 	if (!num_widgets) {
3139 		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3140 			propname);
3141 		return -EINVAL;
3142 	}
3143 
3144 	widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3145 			       GFP_KERNEL);
3146 	if (!widgets) {
3147 		dev_err(card->dev,
3148 			"ASoC: Could not allocate memory for widgets\n");
3149 		return -ENOMEM;
3150 	}
3151 
3152 	for (i = 0; i < num_widgets; i++) {
3153 		ret = of_property_read_string_index(np, propname,
3154 			2 * i, &template);
3155 		if (ret) {
3156 			dev_err(card->dev,
3157 				"ASoC: Property '%s' index %d read error:%d\n",
3158 				propname, 2 * i, ret);
3159 			return -EINVAL;
3160 		}
3161 
3162 		for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3163 			if (!strncmp(template, simple_widgets[j].name,
3164 				     strlen(simple_widgets[j].name))) {
3165 				widgets[i] = simple_widgets[j];
3166 				break;
3167 			}
3168 		}
3169 
3170 		if (j >= ARRAY_SIZE(simple_widgets)) {
3171 			dev_err(card->dev,
3172 				"ASoC: DAPM widget '%s' is not supported\n",
3173 				template);
3174 			return -EINVAL;
3175 		}
3176 
3177 		ret = of_property_read_string_index(np, propname,
3178 						    (2 * i) + 1,
3179 						    &wname);
3180 		if (ret) {
3181 			dev_err(card->dev,
3182 				"ASoC: Property '%s' index %d read error:%d\n",
3183 				propname, (2 * i) + 1, ret);
3184 			return -EINVAL;
3185 		}
3186 
3187 		widgets[i].name = wname;
3188 	}
3189 
3190 	card->dapm_widgets = widgets;
3191 	card->num_dapm_widgets = num_widgets;
3192 
3193 	return 0;
3194 }
3195 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3196 
3197 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3198 			      unsigned int *slots,
3199 			      unsigned int *slot_width)
3200 {
3201 	u32 val;
3202 	int ret;
3203 
3204 	if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3205 		ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3206 		if (ret)
3207 			return ret;
3208 
3209 		if (slots)
3210 			*slots = val;
3211 	}
3212 
3213 	if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3214 		ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3215 		if (ret)
3216 			return ret;
3217 
3218 		if (slot_width)
3219 			*slot_width = val;
3220 	}
3221 
3222 	return 0;
3223 }
3224 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3225 
3226 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3227 				   const char *propname)
3228 {
3229 	struct device_node *np = card->dev->of_node;
3230 	int num_routes;
3231 	struct snd_soc_dapm_route *routes;
3232 	int i, ret;
3233 
3234 	num_routes = of_property_count_strings(np, propname);
3235 	if (num_routes < 0 || num_routes & 1) {
3236 		dev_err(card->dev,
3237 			"ASoC: Property '%s' does not exist or its length is not even\n",
3238 			propname);
3239 		return -EINVAL;
3240 	}
3241 	num_routes /= 2;
3242 	if (!num_routes) {
3243 		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3244 			propname);
3245 		return -EINVAL;
3246 	}
3247 
3248 	routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3249 			      GFP_KERNEL);
3250 	if (!routes) {
3251 		dev_err(card->dev,
3252 			"ASoC: Could not allocate DAPM route table\n");
3253 		return -EINVAL;
3254 	}
3255 
3256 	for (i = 0; i < num_routes; i++) {
3257 		ret = of_property_read_string_index(np, propname,
3258 			2 * i, &routes[i].sink);
3259 		if (ret) {
3260 			dev_err(card->dev,
3261 				"ASoC: Property '%s' index %d could not be read: %d\n",
3262 				propname, 2 * i, ret);
3263 			return -EINVAL;
3264 		}
3265 		ret = of_property_read_string_index(np, propname,
3266 			(2 * i) + 1, &routes[i].source);
3267 		if (ret) {
3268 			dev_err(card->dev,
3269 				"ASoC: Property '%s' index %d could not be read: %d\n",
3270 				propname, (2 * i) + 1, ret);
3271 			return -EINVAL;
3272 		}
3273 	}
3274 
3275 	card->num_dapm_routes = num_routes;
3276 	card->dapm_routes = routes;
3277 
3278 	return 0;
3279 }
3280 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3281 
3282 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3283 				     const char *prefix,
3284 				     struct device_node **bitclkmaster,
3285 				     struct device_node **framemaster)
3286 {
3287 	int ret, i;
3288 	char prop[128];
3289 	unsigned int format = 0;
3290 	int bit, frame;
3291 	const char *str;
3292 	struct {
3293 		char *name;
3294 		unsigned int val;
3295 	} of_fmt_table[] = {
3296 		{ "i2s",	SND_SOC_DAIFMT_I2S },
3297 		{ "right_j",	SND_SOC_DAIFMT_RIGHT_J },
3298 		{ "left_j",	SND_SOC_DAIFMT_LEFT_J },
3299 		{ "dsp_a",	SND_SOC_DAIFMT_DSP_A },
3300 		{ "dsp_b",	SND_SOC_DAIFMT_DSP_B },
3301 		{ "ac97",	SND_SOC_DAIFMT_AC97 },
3302 		{ "pdm",	SND_SOC_DAIFMT_PDM},
3303 		{ "msb",	SND_SOC_DAIFMT_MSB },
3304 		{ "lsb",	SND_SOC_DAIFMT_LSB },
3305 	};
3306 
3307 	if (!prefix)
3308 		prefix = "";
3309 
3310 	/*
3311 	 * check "[prefix]format = xxx"
3312 	 * SND_SOC_DAIFMT_FORMAT_MASK area
3313 	 */
3314 	snprintf(prop, sizeof(prop), "%sformat", prefix);
3315 	ret = of_property_read_string(np, prop, &str);
3316 	if (ret == 0) {
3317 		for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3318 			if (strcmp(str, of_fmt_table[i].name) == 0) {
3319 				format |= of_fmt_table[i].val;
3320 				break;
3321 			}
3322 		}
3323 	}
3324 
3325 	/*
3326 	 * check "[prefix]continuous-clock"
3327 	 * SND_SOC_DAIFMT_CLOCK_MASK area
3328 	 */
3329 	snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3330 	if (of_get_property(np, prop, NULL))
3331 		format |= SND_SOC_DAIFMT_CONT;
3332 	else
3333 		format |= SND_SOC_DAIFMT_GATED;
3334 
3335 	/*
3336 	 * check "[prefix]bitclock-inversion"
3337 	 * check "[prefix]frame-inversion"
3338 	 * SND_SOC_DAIFMT_INV_MASK area
3339 	 */
3340 	snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3341 	bit = !!of_get_property(np, prop, NULL);
3342 
3343 	snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3344 	frame = !!of_get_property(np, prop, NULL);
3345 
3346 	switch ((bit << 4) + frame) {
3347 	case 0x11:
3348 		format |= SND_SOC_DAIFMT_IB_IF;
3349 		break;
3350 	case 0x10:
3351 		format |= SND_SOC_DAIFMT_IB_NF;
3352 		break;
3353 	case 0x01:
3354 		format |= SND_SOC_DAIFMT_NB_IF;
3355 		break;
3356 	default:
3357 		/* SND_SOC_DAIFMT_NB_NF is default */
3358 		break;
3359 	}
3360 
3361 	/*
3362 	 * check "[prefix]bitclock-master"
3363 	 * check "[prefix]frame-master"
3364 	 * SND_SOC_DAIFMT_MASTER_MASK area
3365 	 */
3366 	snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3367 	bit = !!of_get_property(np, prop, NULL);
3368 	if (bit && bitclkmaster)
3369 		*bitclkmaster = of_parse_phandle(np, prop, 0);
3370 
3371 	snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3372 	frame = !!of_get_property(np, prop, NULL);
3373 	if (frame && framemaster)
3374 		*framemaster = of_parse_phandle(np, prop, 0);
3375 
3376 	switch ((bit << 4) + frame) {
3377 	case 0x11:
3378 		format |= SND_SOC_DAIFMT_CBM_CFM;
3379 		break;
3380 	case 0x10:
3381 		format |= SND_SOC_DAIFMT_CBM_CFS;
3382 		break;
3383 	case 0x01:
3384 		format |= SND_SOC_DAIFMT_CBS_CFM;
3385 		break;
3386 	default:
3387 		format |= SND_SOC_DAIFMT_CBS_CFS;
3388 		break;
3389 	}
3390 
3391 	return format;
3392 }
3393 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3394 
3395 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3396 				const char **dai_name)
3397 {
3398 	struct snd_soc_component *pos;
3399 	int ret = -EPROBE_DEFER;
3400 
3401 	mutex_lock(&client_mutex);
3402 	list_for_each_entry(pos, &component_list, list) {
3403 		if (pos->dev->of_node != args->np)
3404 			continue;
3405 
3406 		if (pos->driver->of_xlate_dai_name) {
3407 			ret = pos->driver->of_xlate_dai_name(pos,
3408 							     args,
3409 							     dai_name);
3410 		} else {
3411 			int id = -1;
3412 
3413 			switch (args->args_count) {
3414 			case 0:
3415 				id = 0; /* same as dai_drv[0] */
3416 				break;
3417 			case 1:
3418 				id = args->args[0];
3419 				break;
3420 			default:
3421 				/* not supported */
3422 				break;
3423 			}
3424 
3425 			if (id < 0 || id >= pos->num_dai) {
3426 				ret = -EINVAL;
3427 				continue;
3428 			}
3429 
3430 			ret = 0;
3431 
3432 			*dai_name = pos->dai_drv[id].name;
3433 			if (!*dai_name)
3434 				*dai_name = pos->name;
3435 		}
3436 
3437 		break;
3438 	}
3439 	mutex_unlock(&client_mutex);
3440 	return ret;
3441 }
3442 
3443 int snd_soc_of_get_dai_name(struct device_node *of_node,
3444 			    const char **dai_name)
3445 {
3446 	struct of_phandle_args args;
3447 	int ret;
3448 
3449 	ret = of_parse_phandle_with_args(of_node, "sound-dai",
3450 					 "#sound-dai-cells", 0, &args);
3451 	if (ret)
3452 		return ret;
3453 
3454 	ret = snd_soc_get_dai_name(&args, dai_name);
3455 
3456 	of_node_put(args.np);
3457 
3458 	return ret;
3459 }
3460 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3461 
3462 /*
3463  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3464  * @dev: Card device
3465  * @of_node: Device node
3466  * @dai_link: DAI link
3467  *
3468  * Builds an array of CODEC DAI components from the DAI link property
3469  * 'sound-dai'.
3470  * The array is set in the DAI link and the number of DAIs is set accordingly.
3471  * The device nodes in the array (of_node) must be dereferenced by the caller.
3472  *
3473  * Returns 0 for success
3474  */
3475 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3476 				   struct device_node *of_node,
3477 				   struct snd_soc_dai_link *dai_link)
3478 {
3479 	struct of_phandle_args args;
3480 	struct snd_soc_dai_link_component *component;
3481 	char *name;
3482 	int index, num_codecs, ret;
3483 
3484 	/* Count the number of CODECs */
3485 	name = "sound-dai";
3486 	num_codecs = of_count_phandle_with_args(of_node, name,
3487 						"#sound-dai-cells");
3488 	if (num_codecs <= 0) {
3489 		if (num_codecs == -ENOENT)
3490 			dev_err(dev, "No 'sound-dai' property\n");
3491 		else
3492 			dev_err(dev, "Bad phandle in 'sound-dai'\n");
3493 		return num_codecs;
3494 	}
3495 	component = devm_kzalloc(dev,
3496 				 sizeof *component * num_codecs,
3497 				 GFP_KERNEL);
3498 	if (!component)
3499 		return -ENOMEM;
3500 	dai_link->codecs = component;
3501 	dai_link->num_codecs = num_codecs;
3502 
3503 	/* Parse the list */
3504 	for (index = 0, component = dai_link->codecs;
3505 	     index < dai_link->num_codecs;
3506 	     index++, component++) {
3507 		ret = of_parse_phandle_with_args(of_node, name,
3508 						 "#sound-dai-cells",
3509 						  index, &args);
3510 		if (ret)
3511 			goto err;
3512 		component->of_node = args.np;
3513 		ret = snd_soc_get_dai_name(&args, &component->dai_name);
3514 		if (ret < 0)
3515 			goto err;
3516 	}
3517 	return 0;
3518 err:
3519 	for (index = 0, component = dai_link->codecs;
3520 	     index < dai_link->num_codecs;
3521 	     index++, component++) {
3522 		if (!component->of_node)
3523 			break;
3524 		of_node_put(component->of_node);
3525 		component->of_node = NULL;
3526 	}
3527 	dai_link->codecs = NULL;
3528 	dai_link->num_codecs = 0;
3529 	return ret;
3530 }
3531 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3532 
3533 static int __init snd_soc_init(void)
3534 {
3535 #ifdef CONFIG_DEBUG_FS
3536 	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3537 	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3538 		pr_warn("ASoC: Failed to create debugfs directory\n");
3539 		snd_soc_debugfs_root = NULL;
3540 	}
3541 
3542 	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3543 				 &codec_list_fops))
3544 		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3545 
3546 	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3547 				 &dai_list_fops))
3548 		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3549 
3550 	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3551 				 &platform_list_fops))
3552 		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3553 #endif
3554 
3555 	snd_soc_util_init();
3556 
3557 	return platform_driver_register(&soc_driver);
3558 }
3559 module_init(snd_soc_init);
3560 
3561 static void __exit snd_soc_exit(void)
3562 {
3563 	snd_soc_util_exit();
3564 
3565 #ifdef CONFIG_DEBUG_FS
3566 	debugfs_remove_recursive(snd_soc_debugfs_root);
3567 #endif
3568 	platform_driver_unregister(&soc_driver);
3569 }
3570 module_exit(snd_soc_exit);
3571 
3572 /* Module information */
3573 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3574 MODULE_DESCRIPTION("ALSA SoC Core");
3575 MODULE_LICENSE("GPL");
3576 MODULE_ALIAS("platform:soc-audio");
3577