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KVM: PPC: Book3S HV: Avoid preemptibility warning in module initialization
[linux/fpc-iii.git] / sound / soc / soc-core.c
blob6dca408faae334d223494c33e14d503518b497d7
1 /*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
36 #include <linux/of.h>
37 #include <linux/dmi.h>
38 #include <sound/core.h>
39 #include <sound/jack.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/soc-dpcm.h>
44 #include <sound/soc-topology.h>
45 #include <sound/initval.h>
46
47 #define CREATE_TRACE_POINTS
48 #include <trace/events/asoc.h>
49
50 #define NAME_SIZE 32
51
52 #ifdef CONFIG_DEBUG_FS
53 struct dentry *snd_soc_debugfs_root;
54 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 #endif
56
57 static DEFINE_MUTEX(client_mutex);
58 static LIST_HEAD(platform_list);
59 static LIST_HEAD(codec_list);
60 static LIST_HEAD(component_list);
61
62 /*
63 * This is a timeout to do a DAPM powerdown after a stream is closed().
64 * It can be used to eliminate pops between different playback streams, e.g.
65 * between two audio tracks.
66 */
67 static int pmdown_time = 5000;
68 module_param(pmdown_time, int, 0);
69 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
70
71 /* returns the minimum number of bytes needed to represent
72 * a particular given value */
73 static int min_bytes_needed(unsigned long val)
74 {
75 int c = 0;
76 int i;
77
78 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
79 if (val & (1UL << i))
80 break;
81 c = (sizeof val * 8) - c;
82 if (!c || (c % 8))
83 c = (c + 8) / 8;
84 else
85 c /= 8;
86 return c;
87 }
88
89 /* fill buf which is 'len' bytes with a formatted
90 * string of the form 'reg: value\n' */
91 static int format_register_str(struct snd_soc_codec *codec,
92 unsigned int reg, char *buf, size_t len)
93 {
94 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
95 int regsize = codec->driver->reg_word_size * 2;
96 int ret;
97
98 /* +2 for ': ' and + 1 for '\n' */
99 if (wordsize + regsize + 2 + 1 != len)
100 return -EINVAL;
101
102 sprintf(buf, "%.*x: ", wordsize, reg);
103 buf += wordsize + 2;
104
105 ret = snd_soc_read(codec, reg);
106 if (ret < 0)
107 memset(buf, 'X', regsize);
108 else
109 sprintf(buf, "%.*x", regsize, ret);
110 buf[regsize] = '\n';
111 /* no NUL-termination needed */
112 return 0;
113 }
114
115 /* codec register dump */
116 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
117 size_t count, loff_t pos)
118 {
119 int i, step = 1;
120 int wordsize, regsize;
121 int len;
122 size_t total = 0;
123 loff_t p = 0;
124
125 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
126 regsize = codec->driver->reg_word_size * 2;
127
128 len = wordsize + regsize + 2 + 1;
129
130 if (!codec->driver->reg_cache_size)
131 return 0;
132
133 if (codec->driver->reg_cache_step)
134 step = codec->driver->reg_cache_step;
135
136 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
137 /* only support larger than PAGE_SIZE bytes debugfs
138 * entries for the default case */
139 if (p >= pos) {
140 if (total + len >= count - 1)
141 break;
142 format_register_str(codec, i, buf + total, len);
143 total += len;
144 }
145 p += len;
146 }
147
148 total = min(total, count - 1);
149
150 return total;
151 }
152
153 static ssize_t codec_reg_show(struct device *dev,
154 struct device_attribute *attr, char *buf)
155 {
156 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
157
158 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
159 }
160
161 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
162
163 static ssize_t pmdown_time_show(struct device *dev,
164 struct device_attribute *attr, char *buf)
165 {
166 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
167
168 return sprintf(buf, "%ld\n", rtd->pmdown_time);
169 }
170
171 static ssize_t pmdown_time_set(struct device *dev,
172 struct device_attribute *attr,
173 const char *buf, size_t count)
174 {
175 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
176 int ret;
177
178 ret = kstrtol(buf, 10, &rtd->pmdown_time);
179 if (ret)
180 return ret;
181
182 return count;
183 }
184
185 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
186
187 static struct attribute *soc_dev_attrs[] = {
188 &dev_attr_codec_reg.attr,
189 &dev_attr_pmdown_time.attr,
190 NULL
191 };
192
193 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
194 struct attribute *attr, int idx)
195 {
196 struct device *dev = kobj_to_dev(kobj);
197 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
198
199 if (attr == &dev_attr_pmdown_time.attr)
200 return attr->mode; /* always visible */
201 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
202 }
203
204 static const struct attribute_group soc_dapm_dev_group = {
205 .attrs = soc_dapm_dev_attrs,
206 .is_visible = soc_dev_attr_is_visible,
207 };
208
209 static const struct attribute_group soc_dev_roup = {
210 .attrs = soc_dev_attrs,
211 .is_visible = soc_dev_attr_is_visible,
212 };
213
214 static const struct attribute_group *soc_dev_attr_groups[] = {
215 &soc_dapm_dev_group,
216 &soc_dev_roup,
217 NULL
218 };
219
220 #ifdef CONFIG_DEBUG_FS
221 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
222 size_t count, loff_t *ppos)
223 {
224 ssize_t ret;
225 struct snd_soc_codec *codec = file->private_data;
226 char *buf;
227
228 if (*ppos < 0 || !count)
229 return -EINVAL;
230
231 buf = kmalloc(count, GFP_KERNEL);
232 if (!buf)
233 return -ENOMEM;
234
235 ret = soc_codec_reg_show(codec, buf, count, *ppos);
236 if (ret >= 0) {
237 if (copy_to_user(user_buf, buf, ret)) {
238 kfree(buf);
239 return -EFAULT;
240 }
241 *ppos += ret;
242 }
243
244 kfree(buf);
245 return ret;
246 }
247
248 static ssize_t codec_reg_write_file(struct file *file,
249 const char __user *user_buf, size_t count, loff_t *ppos)
250 {
251 char buf[32];
252 size_t buf_size;
253 char *start = buf;
254 unsigned long reg, value;
255 struct snd_soc_codec *codec = file->private_data;
256 int ret;
257
258 buf_size = min(count, (sizeof(buf)-1));
259 if (copy_from_user(buf, user_buf, buf_size))
260 return -EFAULT;
261 buf[buf_size] = 0;
262
263 while (*start == ' ')
264 start++;
265 reg = simple_strtoul(start, &start, 16);
266 while (*start == ' ')
267 start++;
268 ret = kstrtoul(start, 16, &value);
269 if (ret)
270 return ret;
271
272 /* Userspace has been fiddling around behind the kernel's back */
273 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
274
275 snd_soc_write(codec, reg, value);
276 return buf_size;
277 }
278
279 static const struct file_operations codec_reg_fops = {
280 .open = simple_open,
281 .read = codec_reg_read_file,
282 .write = codec_reg_write_file,
283 .llseek = default_llseek,
284 };
285
286 static void soc_init_component_debugfs(struct snd_soc_component *component)
287 {
288 if (!component->card->debugfs_card_root)
289 return;
290
291 if (component->debugfs_prefix) {
292 char *name;
293
294 name = kasprintf(GFP_KERNEL, "%s:%s",
295 component->debugfs_prefix, component->name);
296 if (name) {
297 component->debugfs_root = debugfs_create_dir(name,
298 component->card->debugfs_card_root);
299 kfree(name);
300 }
301 } else {
302 component->debugfs_root = debugfs_create_dir(component->name,
303 component->card->debugfs_card_root);
304 }
305
306 if (!component->debugfs_root) {
307 dev_warn(component->dev,
308 "ASoC: Failed to create component debugfs directory\n");
309 return;
310 }
311
312 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
313 component->debugfs_root);
314
315 if (component->init_debugfs)
316 component->init_debugfs(component);
317 }
318
319 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
320 {
321 debugfs_remove_recursive(component->debugfs_root);
322 }
323
324 static void soc_init_codec_debugfs(struct snd_soc_component *component)
325 {
326 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
327
328 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
329 codec->component.debugfs_root,
330 codec, &codec_reg_fops);
331 if (!codec->debugfs_reg)
332 dev_warn(codec->dev,
333 "ASoC: Failed to create codec register debugfs file\n");
334 }
335
336 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
337 size_t count, loff_t *ppos)
338 {
339 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
340 ssize_t len, ret = 0;
341 struct snd_soc_codec *codec;
342
343 if (!buf)
344 return -ENOMEM;
345
346 mutex_lock(&client_mutex);
347
348 list_for_each_entry(codec, &codec_list, list) {
349 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
350 codec->component.name);
351 if (len >= 0)
352 ret += len;
353 if (ret > PAGE_SIZE) {
354 ret = PAGE_SIZE;
355 break;
356 }
357 }
358
359 mutex_unlock(&client_mutex);
360
361 if (ret >= 0)
362 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
363
364 kfree(buf);
365
366 return ret;
367 }
368
369 static const struct file_operations codec_list_fops = {
370 .read = codec_list_read_file,
371 .llseek = default_llseek,/* read accesses f_pos */
372 };
373
374 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
375 size_t count, loff_t *ppos)
376 {
377 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
378 ssize_t len, ret = 0;
379 struct snd_soc_component *component;
380 struct snd_soc_dai *dai;
381
382 if (!buf)
383 return -ENOMEM;
384
385 mutex_lock(&client_mutex);
386
387 list_for_each_entry(component, &component_list, list) {
388 list_for_each_entry(dai, &component->dai_list, list) {
389 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
390 dai->name);
391 if (len >= 0)
392 ret += len;
393 if (ret > PAGE_SIZE) {
394 ret = PAGE_SIZE;
395 break;
396 }
397 }
398 }
399
400 mutex_unlock(&client_mutex);
401
402 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
403
404 kfree(buf);
405
406 return ret;
407 }
408
409 static const struct file_operations dai_list_fops = {
410 .read = dai_list_read_file,
411 .llseek = default_llseek,/* read accesses f_pos */
412 };
413
414 static ssize_t platform_list_read_file(struct file *file,
415 char __user *user_buf,
416 size_t count, loff_t *ppos)
417 {
418 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
419 ssize_t len, ret = 0;
420 struct snd_soc_platform *platform;
421
422 if (!buf)
423 return -ENOMEM;
424
425 mutex_lock(&client_mutex);
426
427 list_for_each_entry(platform, &platform_list, list) {
428 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
429 platform->component.name);
430 if (len >= 0)
431 ret += len;
432 if (ret > PAGE_SIZE) {
433 ret = PAGE_SIZE;
434 break;
435 }
436 }
437
438 mutex_unlock(&client_mutex);
439
440 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
441
442 kfree(buf);
443
444 return ret;
445 }
446
447 static const struct file_operations platform_list_fops = {
448 .read = platform_list_read_file,
449 .llseek = default_llseek,/* read accesses f_pos */
450 };
451
452 static void soc_init_card_debugfs(struct snd_soc_card *card)
453 {
454 if (!snd_soc_debugfs_root)
455 return;
456
457 card->debugfs_card_root = debugfs_create_dir(card->name,
458 snd_soc_debugfs_root);
459 if (!card->debugfs_card_root) {
460 dev_warn(card->dev,
461 "ASoC: Failed to create card debugfs directory\n");
462 return;
463 }
464
465 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
466 card->debugfs_card_root,
467 &card->pop_time);
468 if (!card->debugfs_pop_time)
469 dev_warn(card->dev,
470 "ASoC: Failed to create pop time debugfs file\n");
471 }
472
473 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
474 {
475 debugfs_remove_recursive(card->debugfs_card_root);
476 }
477
478
479 static void snd_soc_debugfs_init(void)
480 {
481 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
482 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
483 pr_warn("ASoC: Failed to create debugfs directory\n");
484 snd_soc_debugfs_root = NULL;
485 return;
486 }
487
488 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
489 &codec_list_fops))
490 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
491
492 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
493 &dai_list_fops))
494 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
495
496 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
497 &platform_list_fops))
498 pr_warn("ASoC: Failed to create platform list debugfs file\n");
499 }
500
501 static void snd_soc_debugfs_exit(void)
502 {
503 debugfs_remove_recursive(snd_soc_debugfs_root);
504 }
505
506 #else
507
508 #define soc_init_codec_debugfs NULL
509
510 static inline void soc_init_component_debugfs(
511 struct snd_soc_component *component)
512 {
513 }
514
515 static inline void soc_cleanup_component_debugfs(
516 struct snd_soc_component *component)
517 {
518 }
519
520 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
521 {
522 }
523
524 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
525 {
526 }
527
528 static inline void snd_soc_debugfs_init(void)
529 {
530 }
531
532 static inline void snd_soc_debugfs_exit(void)
533 {
534 }
535
536 #endif
537
538 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
539 const char *dai_link, int stream)
540 {
541 struct snd_soc_pcm_runtime *rtd;
542
543 list_for_each_entry(rtd, &card->rtd_list, list) {
544 if (rtd->dai_link->no_pcm &&
545 !strcmp(rtd->dai_link->name, dai_link))
546 return rtd->pcm->streams[stream].substream;
547 }
548 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
549 return NULL;
550 }
551 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
552
553 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
554 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
555 {
556 struct snd_soc_pcm_runtime *rtd;
557
558 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
559 if (!rtd)
560 return NULL;
561
562 rtd->card = card;
563 rtd->dai_link = dai_link;
564 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
565 dai_link->num_codecs,
566 GFP_KERNEL);
567 if (!rtd->codec_dais) {
568 kfree(rtd);
569 return NULL;
570 }
571
572 return rtd;
573 }
574
575 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
576 {
577 if (rtd && rtd->codec_dais)
578 kfree(rtd->codec_dais);
579 kfree(rtd);
580 }
581
582 static void soc_add_pcm_runtime(struct snd_soc_card *card,
583 struct snd_soc_pcm_runtime *rtd)
584 {
585 list_add_tail(&rtd->list, &card->rtd_list);
586 rtd->num = card->num_rtd;
587 card->num_rtd++;
588 }
589
590 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
591 {
592 struct snd_soc_pcm_runtime *rtd, *_rtd;
593
594 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
595 list_del(&rtd->list);
596 soc_free_pcm_runtime(rtd);
597 }
598
599 card->num_rtd = 0;
600 }
601
602 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
603 const char *dai_link)
604 {
605 struct snd_soc_pcm_runtime *rtd;
606
607 list_for_each_entry(rtd, &card->rtd_list, list) {
608 if (!strcmp(rtd->dai_link->name, dai_link))
609 return rtd;
610 }
611 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
612 return NULL;
613 }
614 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
615
616 static void codec2codec_close_delayed_work(struct work_struct *work)
617 {
618 /* Currently nothing to do for c2c links
619 * Since c2c links are internal nodes in the DAPM graph and
620 * don't interface with the outside world or application layer
621 * we don't have to do any special handling on close.
622 */
623 }
624
625 #ifdef CONFIG_PM_SLEEP
626 /* powers down audio subsystem for suspend */
627 int snd_soc_suspend(struct device *dev)
628 {
629 struct snd_soc_card *card = dev_get_drvdata(dev);
630 struct snd_soc_component *component;
631 struct snd_soc_pcm_runtime *rtd;
632 int i;
633
634 /* If the card is not initialized yet there is nothing to do */
635 if (!card->instantiated)
636 return 0;
637
638 /* Due to the resume being scheduled into a workqueue we could
639 * suspend before that's finished - wait for it to complete.
640 */
641 snd_power_lock(card->snd_card);
642 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
643 snd_power_unlock(card->snd_card);
644
645 /* we're going to block userspace touching us until resume completes */
646 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
647
648 /* mute any active DACs */
649 list_for_each_entry(rtd, &card->rtd_list, list) {
650
651 if (rtd->dai_link->ignore_suspend)
652 continue;
653
654 for (i = 0; i < rtd->num_codecs; i++) {
655 struct snd_soc_dai *dai = rtd->codec_dais[i];
656 struct snd_soc_dai_driver *drv = dai->driver;
657
658 if (drv->ops->digital_mute && dai->playback_active)
659 drv->ops->digital_mute(dai, 1);
660 }
661 }
662
663 /* suspend all pcms */
664 list_for_each_entry(rtd, &card->rtd_list, list) {
665 if (rtd->dai_link->ignore_suspend)
666 continue;
667
668 snd_pcm_suspend_all(rtd->pcm);
669 }
670
671 if (card->suspend_pre)
672 card->suspend_pre(card);
673
674 list_for_each_entry(rtd, &card->rtd_list, list) {
675 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
676
677 if (rtd->dai_link->ignore_suspend)
678 continue;
679
680 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
681 cpu_dai->driver->suspend(cpu_dai);
682 }
683
684 /* close any waiting streams */
685 list_for_each_entry(rtd, &card->rtd_list, list)
686 flush_delayed_work(&rtd->delayed_work);
687
688 list_for_each_entry(rtd, &card->rtd_list, list) {
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 snd_soc_dapm_stream_event(rtd,
694 SNDRV_PCM_STREAM_PLAYBACK,
695 SND_SOC_DAPM_STREAM_SUSPEND);
696
697 snd_soc_dapm_stream_event(rtd,
698 SNDRV_PCM_STREAM_CAPTURE,
699 SND_SOC_DAPM_STREAM_SUSPEND);
700 }
701
702 /* Recheck all endpoints too, their state is affected by suspend */
703 dapm_mark_endpoints_dirty(card);
704 snd_soc_dapm_sync(&card->dapm);
705
706 /* suspend all COMPONENTs */
707 list_for_each_entry(component, &card->component_dev_list, card_list) {
708 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
709
710 /* If there are paths active then the COMPONENT will be held with
711 * bias _ON and should not be suspended. */
712 if (!component->suspended) {
713 switch (snd_soc_dapm_get_bias_level(dapm)) {
714 case SND_SOC_BIAS_STANDBY:
715 /*
716 * If the COMPONENT is capable of idle
717 * bias off then being in STANDBY
718 * means it's doing something,
719 * otherwise fall through.
720 */
721 if (dapm->idle_bias_off) {
722 dev_dbg(component->dev,
723 "ASoC: idle_bias_off CODEC on over suspend\n");
724 break;
725 }
726
727 case SND_SOC_BIAS_OFF:
728 if (component->suspend)
729 component->suspend(component);
730 component->suspended = 1;
731 if (component->regmap)
732 regcache_mark_dirty(component->regmap);
733 /* deactivate pins to sleep state */
734 pinctrl_pm_select_sleep_state(component->dev);
735 break;
736 default:
737 dev_dbg(component->dev,
738 "ASoC: COMPONENT is on over suspend\n");
739 break;
740 }
741 }
742 }
743
744 list_for_each_entry(rtd, &card->rtd_list, list) {
745 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
746
747 if (rtd->dai_link->ignore_suspend)
748 continue;
749
750 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
751 cpu_dai->driver->suspend(cpu_dai);
752
753 /* deactivate pins to sleep state */
754 pinctrl_pm_select_sleep_state(cpu_dai->dev);
755 }
756
757 if (card->suspend_post)
758 card->suspend_post(card);
759
760 return 0;
761 }
762 EXPORT_SYMBOL_GPL(snd_soc_suspend);
763
764 /* deferred resume work, so resume can complete before we finished
765 * setting our codec back up, which can be very slow on I2C
766 */
767 static void soc_resume_deferred(struct work_struct *work)
768 {
769 struct snd_soc_card *card =
770 container_of(work, struct snd_soc_card, deferred_resume_work);
771 struct snd_soc_pcm_runtime *rtd;
772 struct snd_soc_component *component;
773 int i;
774
775 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
776 * so userspace apps are blocked from touching us
777 */
778
779 dev_dbg(card->dev, "ASoC: starting resume work\n");
780
781 /* Bring us up into D2 so that DAPM starts enabling things */
782 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
783
784 if (card->resume_pre)
785 card->resume_pre(card);
786
787 /* resume control bus DAIs */
788 list_for_each_entry(rtd, &card->rtd_list, list) {
789 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
790
791 if (rtd->dai_link->ignore_suspend)
792 continue;
793
794 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
795 cpu_dai->driver->resume(cpu_dai);
796 }
797
798 list_for_each_entry(component, &card->component_dev_list, card_list) {
799 if (component->suspended) {
800 if (component->resume)
801 component->resume(component);
802 component->suspended = 0;
803 }
804 }
805
806 list_for_each_entry(rtd, &card->rtd_list, list) {
807
808 if (rtd->dai_link->ignore_suspend)
809 continue;
810
811 snd_soc_dapm_stream_event(rtd,
812 SNDRV_PCM_STREAM_PLAYBACK,
813 SND_SOC_DAPM_STREAM_RESUME);
814
815 snd_soc_dapm_stream_event(rtd,
816 SNDRV_PCM_STREAM_CAPTURE,
817 SND_SOC_DAPM_STREAM_RESUME);
818 }
819
820 /* unmute any active DACs */
821 list_for_each_entry(rtd, &card->rtd_list, list) {
822
823 if (rtd->dai_link->ignore_suspend)
824 continue;
825
826 for (i = 0; i < rtd->num_codecs; i++) {
827 struct snd_soc_dai *dai = rtd->codec_dais[i];
828 struct snd_soc_dai_driver *drv = dai->driver;
829
830 if (drv->ops->digital_mute && dai->playback_active)
831 drv->ops->digital_mute(dai, 0);
832 }
833 }
834
835 list_for_each_entry(rtd, &card->rtd_list, list) {
836 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
837
838 if (rtd->dai_link->ignore_suspend)
839 continue;
840
841 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
842 cpu_dai->driver->resume(cpu_dai);
843 }
844
845 if (card->resume_post)
846 card->resume_post(card);
847
848 dev_dbg(card->dev, "ASoC: resume work completed\n");
849
850 /* Recheck all endpoints too, their state is affected by suspend */
851 dapm_mark_endpoints_dirty(card);
852 snd_soc_dapm_sync(&card->dapm);
853
854 /* userspace can access us now we are back as we were before */
855 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
856 }
857
858 /* powers up audio subsystem after a suspend */
859 int snd_soc_resume(struct device *dev)
860 {
861 struct snd_soc_card *card = dev_get_drvdata(dev);
862 bool bus_control = false;
863 struct snd_soc_pcm_runtime *rtd;
864
865 /* If the card is not initialized yet there is nothing to do */
866 if (!card->instantiated)
867 return 0;
868
869 /* activate pins from sleep state */
870 list_for_each_entry(rtd, &card->rtd_list, list) {
871 struct snd_soc_dai **codec_dais = rtd->codec_dais;
872 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
873 int j;
874
875 if (cpu_dai->active)
876 pinctrl_pm_select_default_state(cpu_dai->dev);
877
878 for (j = 0; j < rtd->num_codecs; j++) {
879 struct snd_soc_dai *codec_dai = codec_dais[j];
880 if (codec_dai->active)
881 pinctrl_pm_select_default_state(codec_dai->dev);
882 }
883 }
884
885 /*
886 * DAIs that also act as the control bus master might have other drivers
887 * hanging off them so need to resume immediately. Other drivers don't
888 * have that problem and may take a substantial amount of time to resume
889 * due to I/O costs and anti-pop so handle them out of line.
890 */
891 list_for_each_entry(rtd, &card->rtd_list, list) {
892 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
893 bus_control |= cpu_dai->driver->bus_control;
894 }
895 if (bus_control) {
896 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
897 soc_resume_deferred(&card->deferred_resume_work);
898 } else {
899 dev_dbg(dev, "ASoC: Scheduling resume work\n");
900 if (!schedule_work(&card->deferred_resume_work))
901 dev_err(dev, "ASoC: resume work item may be lost\n");
902 }
903
904 return 0;
905 }
906 EXPORT_SYMBOL_GPL(snd_soc_resume);
907 #else
908 #define snd_soc_suspend NULL
909 #define snd_soc_resume NULL
910 #endif
911
912 static const struct snd_soc_dai_ops null_dai_ops = {
913 };
914
915 static struct snd_soc_component *soc_find_component(
916 const struct device_node *of_node, const char *name)
917 {
918 struct snd_soc_component *component;
919
920 lockdep_assert_held(&client_mutex);
921
922 list_for_each_entry(component, &component_list, list) {
923 if (of_node) {
924 if (component->dev->of_node == of_node)
925 return component;
926 } else if (strcmp(component->name, name) == 0) {
927 return component;
928 }
929 }
930
931 return NULL;
932 }
933
934 /**
935 * snd_soc_find_dai - Find a registered DAI
936 *
937 * @dlc: name of the DAI and optional component info to match
938 *
939 * This function will search all regsitered components and their DAIs to
940 * find the DAI of the same name. The component's of_node and name
941 * should also match if being specified.
942 *
943 * Return: pointer of DAI, or NULL if not found.
944 */
945 struct snd_soc_dai *snd_soc_find_dai(
946 const struct snd_soc_dai_link_component *dlc)
947 {
948 struct snd_soc_component *component;
949 struct snd_soc_dai *dai;
950 struct device_node *component_of_node;
951
952 lockdep_assert_held(&client_mutex);
953
954 /* Find CPU DAI from registered DAIs*/
955 list_for_each_entry(component, &component_list, list) {
956 component_of_node = component->dev->of_node;
957 if (!component_of_node && component->dev->parent)
958 component_of_node = component->dev->parent->of_node;
959
960 if (dlc->of_node && component_of_node != dlc->of_node)
961 continue;
962 if (dlc->name && strcmp(component->name, dlc->name))
963 continue;
964 list_for_each_entry(dai, &component->dai_list, list) {
965 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
966 continue;
967
968 return dai;
969 }
970 }
971
972 return NULL;
973 }
974 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
975
976
977 /**
978 * snd_soc_find_dai_link - Find a DAI link
979 *
980 * @card: soc card
981 * @id: DAI link ID to match
982 * @name: DAI link name to match, optional
983 * @stream_name: DAI link stream name to match, optional
984 *
985 * This function will search all existing DAI links of the soc card to
986 * find the link of the same ID. Since DAI links may not have their
987 * unique ID, so name and stream name should also match if being
988 * specified.
989 *
990 * Return: pointer of DAI link, or NULL if not found.
991 */
992 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
993 int id, const char *name,
994 const char *stream_name)
995 {
996 struct snd_soc_dai_link *link, *_link;
997
998 lockdep_assert_held(&client_mutex);
999
1000 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1001 if (link->id != id)
1002 continue;
1003
1004 if (name && (!link->name || strcmp(name, link->name)))
1005 continue;
1006
1007 if (stream_name && (!link->stream_name
1008 || strcmp(stream_name, link->stream_name)))
1009 continue;
1010
1011 return link;
1012 }
1013
1014 return NULL;
1015 }
1016 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1017
1018 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1019 struct snd_soc_dai_link *dai_link)
1020 {
1021 struct snd_soc_pcm_runtime *rtd;
1022
1023 list_for_each_entry(rtd, &card->rtd_list, list) {
1024 if (rtd->dai_link == dai_link)
1025 return true;
1026 }
1027
1028 return false;
1029 }
1030
1031 static int soc_bind_dai_link(struct snd_soc_card *card,
1032 struct snd_soc_dai_link *dai_link)
1033 {
1034 struct snd_soc_pcm_runtime *rtd;
1035 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1036 struct snd_soc_dai_link_component cpu_dai_component;
1037 struct snd_soc_dai **codec_dais;
1038 struct snd_soc_platform *platform;
1039 struct device_node *platform_of_node;
1040 const char *platform_name;
1041 int i;
1042
1043 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1044
1045 if (soc_is_dai_link_bound(card, dai_link)) {
1046 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1047 dai_link->name);
1048 return 0;
1049 }
1050
1051 rtd = soc_new_pcm_runtime(card, dai_link);
1052 if (!rtd)
1053 return -ENOMEM;
1054
1055 cpu_dai_component.name = dai_link->cpu_name;
1056 cpu_dai_component.of_node = dai_link->cpu_of_node;
1057 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1058 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1059 if (!rtd->cpu_dai) {
1060 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1061 dai_link->cpu_dai_name);
1062 goto _err_defer;
1063 }
1064
1065 rtd->num_codecs = dai_link->num_codecs;
1066
1067 /* Find CODEC from registered CODECs */
1068 codec_dais = rtd->codec_dais;
1069 for (i = 0; i < rtd->num_codecs; i++) {
1070 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1071 if (!codec_dais[i]) {
1072 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1073 codecs[i].dai_name);
1074 goto _err_defer;
1075 }
1076 }
1077
1078 /* Single codec links expect codec and codec_dai in runtime data */
1079 rtd->codec_dai = codec_dais[0];
1080 rtd->codec = rtd->codec_dai->codec;
1081
1082 /* if there's no platform we match on the empty platform */
1083 platform_name = dai_link->platform_name;
1084 if (!platform_name && !dai_link->platform_of_node)
1085 platform_name = "snd-soc-dummy";
1086
1087 /* find one from the set of registered platforms */
1088 list_for_each_entry(platform, &platform_list, list) {
1089 platform_of_node = platform->dev->of_node;
1090 if (!platform_of_node && platform->dev->parent->of_node)
1091 platform_of_node = platform->dev->parent->of_node;
1092
1093 if (dai_link->platform_of_node) {
1094 if (platform_of_node != dai_link->platform_of_node)
1095 continue;
1096 } else {
1097 if (strcmp(platform->component.name, platform_name))
1098 continue;
1099 }
1100
1101 rtd->platform = platform;
1102 }
1103 if (!rtd->platform) {
1104 dev_err(card->dev, "ASoC: platform %s not registered\n",
1105 dai_link->platform_name);
1106 goto _err_defer;
1107 }
1108
1109 soc_add_pcm_runtime(card, rtd);
1110 return 0;
1111
1112 _err_defer:
1113 soc_free_pcm_runtime(rtd);
1114 return -EPROBE_DEFER;
1115 }
1116
1117 static void soc_remove_component(struct snd_soc_component *component)
1118 {
1119 if (!component->card)
1120 return;
1121
1122 list_del(&component->card_list);
1123
1124 if (component->remove)
1125 component->remove(component);
1126
1127 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1128
1129 soc_cleanup_component_debugfs(component);
1130 component->card = NULL;
1131 module_put(component->dev->driver->owner);
1132 }
1133
1134 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1135 {
1136 int err;
1137
1138 if (dai && dai->probed &&
1139 dai->driver->remove_order == order) {
1140 if (dai->driver->remove) {
1141 err = dai->driver->remove(dai);
1142 if (err < 0)
1143 dev_err(dai->dev,
1144 "ASoC: failed to remove %s: %d\n",
1145 dai->name, err);
1146 }
1147 dai->probed = 0;
1148 }
1149 }
1150
1151 static void soc_remove_link_dais(struct snd_soc_card *card,
1152 struct snd_soc_pcm_runtime *rtd, int order)
1153 {
1154 int i;
1155
1156 /* unregister the rtd device */
1157 if (rtd->dev_registered) {
1158 device_unregister(rtd->dev);
1159 rtd->dev_registered = 0;
1160 }
1161
1162 /* remove the CODEC DAI */
1163 for (i = 0; i < rtd->num_codecs; i++)
1164 soc_remove_dai(rtd->codec_dais[i], order);
1165
1166 soc_remove_dai(rtd->cpu_dai, order);
1167 }
1168
1169 static void soc_remove_link_components(struct snd_soc_card *card,
1170 struct snd_soc_pcm_runtime *rtd, int order)
1171 {
1172 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1173 struct snd_soc_platform *platform = rtd->platform;
1174 struct snd_soc_component *component;
1175 int i;
1176
1177 /* remove the platform */
1178 if (platform && platform->component.driver->remove_order == order)
1179 soc_remove_component(&platform->component);
1180
1181 /* remove the CODEC-side CODEC */
1182 for (i = 0; i < rtd->num_codecs; i++) {
1183 component = rtd->codec_dais[i]->component;
1184 if (component->driver->remove_order == order)
1185 soc_remove_component(component);
1186 }
1187
1188 /* remove any CPU-side CODEC */
1189 if (cpu_dai) {
1190 if (cpu_dai->component->driver->remove_order == order)
1191 soc_remove_component(cpu_dai->component);
1192 }
1193 }
1194
1195 static void soc_remove_dai_links(struct snd_soc_card *card)
1196 {
1197 int order;
1198 struct snd_soc_pcm_runtime *rtd;
1199 struct snd_soc_dai_link *link, *_link;
1200
1201 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1202 order++) {
1203 list_for_each_entry(rtd, &card->rtd_list, list)
1204 soc_remove_link_dais(card, rtd, order);
1205 }
1206
1207 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1208 order++) {
1209 list_for_each_entry(rtd, &card->rtd_list, list)
1210 soc_remove_link_components(card, rtd, order);
1211 }
1212
1213 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1214 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1215 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1216 link->name);
1217
1218 list_del(&link->list);
1219 card->num_dai_links--;
1220 }
1221 }
1222
1223 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1224 struct snd_soc_dai_link *dai_link)
1225 {
1226 /* Legacy codec/codec_dai link is a single entry in multicodec */
1227 if (dai_link->codec_name || dai_link->codec_of_node ||
1228 dai_link->codec_dai_name) {
1229 dai_link->num_codecs = 1;
1230
1231 dai_link->codecs = devm_kzalloc(card->dev,
1232 sizeof(struct snd_soc_dai_link_component),
1233 GFP_KERNEL);
1234 if (!dai_link->codecs)
1235 return -ENOMEM;
1236
1237 dai_link->codecs[0].name = dai_link->codec_name;
1238 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1239 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1240 }
1241
1242 if (!dai_link->codecs) {
1243 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1244 return -EINVAL;
1245 }
1246
1247 return 0;
1248 }
1249
1250 static int soc_init_dai_link(struct snd_soc_card *card,
1251 struct snd_soc_dai_link *link)
1252 {
1253 int i, ret;
1254
1255 ret = snd_soc_init_multicodec(card, link);
1256 if (ret) {
1257 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1258 return ret;
1259 }
1260
1261 for (i = 0; i < link->num_codecs; i++) {
1262 /*
1263 * Codec must be specified by 1 of name or OF node,
1264 * not both or neither.
1265 */
1266 if (!!link->codecs[i].name ==
1267 !!link->codecs[i].of_node) {
1268 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1269 link->name);
1270 return -EINVAL;
1271 }
1272 /* Codec DAI name must be specified */
1273 if (!link->codecs[i].dai_name) {
1274 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1275 link->name);
1276 return -EINVAL;
1277 }
1278 }
1279
1280 /*
1281 * Platform may be specified by either name or OF node, but
1282 * can be left unspecified, and a dummy platform will be used.
1283 */
1284 if (link->platform_name && link->platform_of_node) {
1285 dev_err(card->dev,
1286 "ASoC: Both platform name/of_node are set for %s\n",
1287 link->name);
1288 return -EINVAL;
1289 }
1290
1291 /*
1292 * CPU device may be specified by either name or OF node, but
1293 * can be left unspecified, and will be matched based on DAI
1294 * name alone..
1295 */
1296 if (link->cpu_name && link->cpu_of_node) {
1297 dev_err(card->dev,
1298 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1299 link->name);
1300 return -EINVAL;
1301 }
1302 /*
1303 * At least one of CPU DAI name or CPU device name/node must be
1304 * specified
1305 */
1306 if (!link->cpu_dai_name &&
1307 !(link->cpu_name || link->cpu_of_node)) {
1308 dev_err(card->dev,
1309 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1310 link->name);
1311 return -EINVAL;
1312 }
1313
1314 return 0;
1315 }
1316
1317 /**
1318 * snd_soc_add_dai_link - Add a DAI link dynamically
1319 * @card: The ASoC card to which the DAI link is added
1320 * @dai_link: The new DAI link to add
1321 *
1322 * This function adds a DAI link to the ASoC card's link list.
1323 *
1324 * Note: Topology can use this API to add DAI links when probing the
1325 * topology component. And machine drivers can still define static
1326 * DAI links in dai_link array.
1327 */
1328 int snd_soc_add_dai_link(struct snd_soc_card *card,
1329 struct snd_soc_dai_link *dai_link)
1330 {
1331 if (dai_link->dobj.type
1332 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1333 dev_err(card->dev, "Invalid dai link type %d\n",
1334 dai_link->dobj.type);
1335 return -EINVAL;
1336 }
1337
1338 lockdep_assert_held(&client_mutex);
1339 /* Notify the machine driver for extra initialization
1340 * on the link created by topology.
1341 */
1342 if (dai_link->dobj.type && card->add_dai_link)
1343 card->add_dai_link(card, dai_link);
1344
1345 list_add_tail(&dai_link->list, &card->dai_link_list);
1346 card->num_dai_links++;
1347
1348 return 0;
1349 }
1350 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1351
1352 /**
1353 * snd_soc_remove_dai_link - Remove a DAI link from the list
1354 * @card: The ASoC card that owns the link
1355 * @dai_link: The DAI link to remove
1356 *
1357 * This function removes a DAI link from the ASoC card's link list.
1358 *
1359 * For DAI links previously added by topology, topology should
1360 * remove them by using the dobj embedded in the link.
1361 */
1362 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1363 struct snd_soc_dai_link *dai_link)
1364 {
1365 struct snd_soc_dai_link *link, *_link;
1366
1367 if (dai_link->dobj.type
1368 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1369 dev_err(card->dev, "Invalid dai link type %d\n",
1370 dai_link->dobj.type);
1371 return;
1372 }
1373
1374 lockdep_assert_held(&client_mutex);
1375 /* Notify the machine driver for extra destruction
1376 * on the link created by topology.
1377 */
1378 if (dai_link->dobj.type && card->remove_dai_link)
1379 card->remove_dai_link(card, dai_link);
1380
1381 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1382 if (link == dai_link) {
1383 list_del(&link->list);
1384 card->num_dai_links--;
1385 return;
1386 }
1387 }
1388 }
1389 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1390
1391 static void soc_set_name_prefix(struct snd_soc_card *card,
1392 struct snd_soc_component *component)
1393 {
1394 int i;
1395
1396 if (card->codec_conf == NULL)
1397 return;
1398
1399 for (i = 0; i < card->num_configs; i++) {
1400 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1401 if (map->of_node && component->dev->of_node != map->of_node)
1402 continue;
1403 if (map->dev_name && strcmp(component->name, map->dev_name))
1404 continue;
1405 component->name_prefix = map->name_prefix;
1406 break;
1407 }
1408 }
1409
1410 static int soc_probe_component(struct snd_soc_card *card,
1411 struct snd_soc_component *component)
1412 {
1413 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1414 struct snd_soc_dai *dai;
1415 int ret;
1416
1417 if (!strcmp(component->name, "snd-soc-dummy"))
1418 return 0;
1419
1420 if (component->card) {
1421 if (component->card != card) {
1422 dev_err(component->dev,
1423 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1424 card->name, component->card->name);
1425 return -ENODEV;
1426 }
1427 return 0;
1428 }
1429
1430 if (!try_module_get(component->dev->driver->owner))
1431 return -ENODEV;
1432
1433 component->card = card;
1434 dapm->card = card;
1435 soc_set_name_prefix(card, component);
1436
1437 soc_init_component_debugfs(component);
1438
1439 if (component->dapm_widgets) {
1440 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1441 component->num_dapm_widgets);
1442
1443 if (ret != 0) {
1444 dev_err(component->dev,
1445 "Failed to create new controls %d\n", ret);
1446 goto err_probe;
1447 }
1448 }
1449
1450 list_for_each_entry(dai, &component->dai_list, list) {
1451 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1452 if (ret != 0) {
1453 dev_err(component->dev,
1454 "Failed to create DAI widgets %d\n", ret);
1455 goto err_probe;
1456 }
1457 }
1458
1459 if (component->probe) {
1460 ret = component->probe(component);
1461 if (ret < 0) {
1462 dev_err(component->dev,
1463 "ASoC: failed to probe component %d\n", ret);
1464 goto err_probe;
1465 }
1466
1467 WARN(dapm->idle_bias_off &&
1468 dapm->bias_level != SND_SOC_BIAS_OFF,
1469 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1470 component->name);
1471 }
1472
1473 /* machine specific init */
1474 if (component->init) {
1475 ret = component->init(component);
1476 if (ret < 0) {
1477 dev_err(component->dev,
1478 "Failed to do machine specific init %d\n", ret);
1479 goto err_probe;
1480 }
1481 }
1482
1483 if (component->controls)
1484 snd_soc_add_component_controls(component, component->controls,
1485 component->num_controls);
1486 if (component->dapm_routes)
1487 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1488 component->num_dapm_routes);
1489
1490 list_add(&dapm->list, &card->dapm_list);
1491 list_add(&component->card_list, &card->component_dev_list);
1492
1493 return 0;
1494
1495 err_probe:
1496 soc_cleanup_component_debugfs(component);
1497 component->card = NULL;
1498 module_put(component->dev->driver->owner);
1499
1500 return ret;
1501 }
1502
1503 static void rtd_release(struct device *dev)
1504 {
1505 kfree(dev);
1506 }
1507
1508 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1509 const char *name)
1510 {
1511 int ret = 0;
1512
1513 /* register the rtd device */
1514 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1515 if (!rtd->dev)
1516 return -ENOMEM;
1517 device_initialize(rtd->dev);
1518 rtd->dev->parent = rtd->card->dev;
1519 rtd->dev->release = rtd_release;
1520 rtd->dev->groups = soc_dev_attr_groups;
1521 dev_set_name(rtd->dev, "%s", name);
1522 dev_set_drvdata(rtd->dev, rtd);
1523 mutex_init(&rtd->pcm_mutex);
1524 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1525 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1526 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1527 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1528 ret = device_add(rtd->dev);
1529 if (ret < 0) {
1530 /* calling put_device() here to free the rtd->dev */
1531 put_device(rtd->dev);
1532 dev_err(rtd->card->dev,
1533 "ASoC: failed to register runtime device: %d\n", ret);
1534 return ret;
1535 }
1536 rtd->dev_registered = 1;
1537 return 0;
1538 }
1539
1540 static int soc_probe_link_components(struct snd_soc_card *card,
1541 struct snd_soc_pcm_runtime *rtd,
1542 int order)
1543 {
1544 struct snd_soc_platform *platform = rtd->platform;
1545 struct snd_soc_component *component;
1546 int i, ret;
1547
1548 /* probe the CPU-side component, if it is a CODEC */
1549 component = rtd->cpu_dai->component;
1550 if (component->driver->probe_order == order) {
1551 ret = soc_probe_component(card, component);
1552 if (ret < 0)
1553 return ret;
1554 }
1555
1556 /* probe the CODEC-side components */
1557 for (i = 0; i < rtd->num_codecs; i++) {
1558 component = rtd->codec_dais[i]->component;
1559 if (component->driver->probe_order == order) {
1560 ret = soc_probe_component(card, component);
1561 if (ret < 0)
1562 return ret;
1563 }
1564 }
1565
1566 /* probe the platform */
1567 if (platform->component.driver->probe_order == order) {
1568 ret = soc_probe_component(card, &platform->component);
1569 if (ret < 0)
1570 return ret;
1571 }
1572
1573 return 0;
1574 }
1575
1576 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1577 {
1578 int ret;
1579
1580 if (!dai->probed && dai->driver->probe_order == order) {
1581 if (dai->driver->probe) {
1582 ret = dai->driver->probe(dai);
1583 if (ret < 0) {
1584 dev_err(dai->dev,
1585 "ASoC: failed to probe DAI %s: %d\n",
1586 dai->name, ret);
1587 return ret;
1588 }
1589 }
1590
1591 dai->probed = 1;
1592 }
1593
1594 return 0;
1595 }
1596
1597 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1598 struct snd_soc_pcm_runtime *rtd)
1599 {
1600 int i, ret = 0;
1601
1602 for (i = 0; i < num_dais; ++i) {
1603 struct snd_soc_dai_driver *drv = dais[i]->driver;
1604
1605 if (!rtd->dai_link->no_pcm && drv->pcm_new)
1606 ret = drv->pcm_new(rtd, dais[i]);
1607 if (ret < 0) {
1608 dev_err(dais[i]->dev,
1609 "ASoC: Failed to bind %s with pcm device\n",
1610 dais[i]->name);
1611 return ret;
1612 }
1613 }
1614
1615 return 0;
1616 }
1617
1618 static int soc_link_dai_widgets(struct snd_soc_card *card,
1619 struct snd_soc_dai_link *dai_link,
1620 struct snd_soc_pcm_runtime *rtd)
1621 {
1622 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1623 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1624 struct snd_soc_dapm_widget *sink, *source;
1625 int ret;
1626
1627 if (rtd->num_codecs > 1)
1628 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1629
1630 /* link the DAI widgets */
1631 sink = codec_dai->playback_widget;
1632 source = cpu_dai->capture_widget;
1633 if (sink && source) {
1634 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1635 dai_link->num_params,
1636 source, sink);
1637 if (ret != 0) {
1638 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1639 sink->name, source->name, ret);
1640 return ret;
1641 }
1642 }
1643
1644 sink = cpu_dai->playback_widget;
1645 source = codec_dai->capture_widget;
1646 if (sink && source) {
1647 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1648 dai_link->num_params,
1649 source, sink);
1650 if (ret != 0) {
1651 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1652 sink->name, source->name, ret);
1653 return ret;
1654 }
1655 }
1656
1657 return 0;
1658 }
1659
1660 static int soc_probe_link_dais(struct snd_soc_card *card,
1661 struct snd_soc_pcm_runtime *rtd, int order)
1662 {
1663 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1664 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1665 int i, ret;
1666
1667 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1668 card->name, rtd->num, order);
1669
1670 /* set default power off timeout */
1671 rtd->pmdown_time = pmdown_time;
1672
1673 ret = soc_probe_dai(cpu_dai, order);
1674 if (ret)
1675 return ret;
1676
1677 /* probe the CODEC DAI */
1678 for (i = 0; i < rtd->num_codecs; i++) {
1679 ret = soc_probe_dai(rtd->codec_dais[i], order);
1680 if (ret)
1681 return ret;
1682 }
1683
1684 /* complete DAI probe during last probe */
1685 if (order != SND_SOC_COMP_ORDER_LAST)
1686 return 0;
1687
1688 /* do machine specific initialization */
1689 if (dai_link->init) {
1690 ret = dai_link->init(rtd);
1691 if (ret < 0) {
1692 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1693 dai_link->name, ret);
1694 return ret;
1695 }
1696 }
1697
1698 if (dai_link->dai_fmt)
1699 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1700
1701 ret = soc_post_component_init(rtd, dai_link->name);
1702 if (ret)
1703 return ret;
1704
1705 #ifdef CONFIG_DEBUG_FS
1706 /* add DPCM sysfs entries */
1707 if (dai_link->dynamic)
1708 soc_dpcm_debugfs_add(rtd);
1709 #endif
1710
1711 if (cpu_dai->driver->compress_new) {
1712 /*create compress_device"*/
1713 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1714 if (ret < 0) {
1715 dev_err(card->dev, "ASoC: can't create compress %s\n",
1716 dai_link->stream_name);
1717 return ret;
1718 }
1719 } else {
1720
1721 if (!dai_link->params) {
1722 /* create the pcm */
1723 ret = soc_new_pcm(rtd, rtd->num);
1724 if (ret < 0) {
1725 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1726 dai_link->stream_name, ret);
1727 return ret;
1728 }
1729 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1730 if (ret < 0)
1731 return ret;
1732 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1733 rtd->num_codecs, rtd);
1734 if (ret < 0)
1735 return ret;
1736 } else {
1737 INIT_DELAYED_WORK(&rtd->delayed_work,
1738 codec2codec_close_delayed_work);
1739
1740 /* link the DAI widgets */
1741 ret = soc_link_dai_widgets(card, dai_link, rtd);
1742 if (ret)
1743 return ret;
1744 }
1745 }
1746
1747 return 0;
1748 }
1749
1750 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1751 {
1752 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1753 struct snd_soc_component *component;
1754 const char *name;
1755 struct device_node *codec_of_node;
1756
1757 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1758 /* codecs, usually analog devices */
1759 name = aux_dev->codec_name;
1760 codec_of_node = aux_dev->codec_of_node;
1761 component = soc_find_component(codec_of_node, name);
1762 if (!component) {
1763 if (codec_of_node)
1764 name = of_node_full_name(codec_of_node);
1765 goto err_defer;
1766 }
1767 } else if (aux_dev->name) {
1768 /* generic components */
1769 name = aux_dev->name;
1770 component = soc_find_component(NULL, name);
1771 if (!component)
1772 goto err_defer;
1773 } else {
1774 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1775 return -EINVAL;
1776 }
1777
1778 component->init = aux_dev->init;
1779 component->auxiliary = 1;
1780 list_add(&component->card_aux_list, &card->aux_comp_list);
1781
1782 return 0;
1783
1784 err_defer:
1785 dev_err(card->dev, "ASoC: %s not registered\n", name);
1786 return -EPROBE_DEFER;
1787 }
1788
1789 static int soc_probe_aux_devices(struct snd_soc_card *card)
1790 {
1791 struct snd_soc_component *comp, *tmp;
1792 int order;
1793 int ret;
1794
1795 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1796 order++) {
1797 list_for_each_entry_safe(comp, tmp, &card->aux_comp_list,
1798 card_aux_list) {
1799 if (comp->driver->probe_order == order) {
1800 ret = soc_probe_component(card, comp);
1801 if (ret < 0) {
1802 dev_err(card->dev,
1803 "ASoC: failed to probe aux component %s %d\n",
1804 comp->name, ret);
1805 return ret;
1806 }
1807 list_del(&comp->card_aux_list);
1808 }
1809 }
1810 }
1811
1812 return 0;
1813 }
1814
1815 static void soc_remove_aux_devices(struct snd_soc_card *card)
1816 {
1817 struct snd_soc_component *comp, *_comp;
1818 int order;
1819
1820 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1821 order++) {
1822 list_for_each_entry_safe(comp, _comp,
1823 &card->component_dev_list, card_list) {
1824
1825 if (!comp->auxiliary)
1826 continue;
1827
1828 if (comp->driver->remove_order == order) {
1829 soc_remove_component(comp);
1830 comp->auxiliary = 0;
1831 }
1832 }
1833 }
1834 }
1835
1836 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1837 {
1838 int ret;
1839
1840 if (codec->cache_init)
1841 return 0;
1842
1843 ret = snd_soc_cache_init(codec);
1844 if (ret < 0) {
1845 dev_err(codec->dev,
1846 "ASoC: Failed to set cache compression type: %d\n",
1847 ret);
1848 return ret;
1849 }
1850 codec->cache_init = 1;
1851 return 0;
1852 }
1853
1854 /**
1855 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1856 * @rtd: The runtime for which the DAI link format should be changed
1857 * @dai_fmt: The new DAI link format
1858 *
1859 * This function updates the DAI link format for all DAIs connected to the DAI
1860 * link for the specified runtime.
1861 *
1862 * Note: For setups with a static format set the dai_fmt field in the
1863 * corresponding snd_dai_link struct instead of using this function.
1864 *
1865 * Returns 0 on success, otherwise a negative error code.
1866 */
1867 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1868 unsigned int dai_fmt)
1869 {
1870 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1871 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1872 unsigned int i;
1873 int ret;
1874
1875 for (i = 0; i < rtd->num_codecs; i++) {
1876 struct snd_soc_dai *codec_dai = codec_dais[i];
1877
1878 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1879 if (ret != 0 && ret != -ENOTSUPP) {
1880 dev_warn(codec_dai->dev,
1881 "ASoC: Failed to set DAI format: %d\n", ret);
1882 return ret;
1883 }
1884 }
1885
1886 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1887 if (cpu_dai->codec) {
1888 unsigned int inv_dai_fmt;
1889
1890 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1891 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1892 case SND_SOC_DAIFMT_CBM_CFM:
1893 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1894 break;
1895 case SND_SOC_DAIFMT_CBM_CFS:
1896 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1897 break;
1898 case SND_SOC_DAIFMT_CBS_CFM:
1899 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1900 break;
1901 case SND_SOC_DAIFMT_CBS_CFS:
1902 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1903 break;
1904 }
1905
1906 dai_fmt = inv_dai_fmt;
1907 }
1908
1909 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1910 if (ret != 0 && ret != -ENOTSUPP) {
1911 dev_warn(cpu_dai->dev,
1912 "ASoC: Failed to set DAI format: %d\n", ret);
1913 return ret;
1914 }
1915
1916 return 0;
1917 }
1918 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1919
1920
1921 /* Trim special characters, and replace '-' with '_' since '-' is used to
1922 * separate different DMI fields in the card long name. Only number and
1923 * alphabet characters and a few separator characters are kept.
1924 */
1925 static void cleanup_dmi_name(char *name)
1926 {
1927 int i, j = 0;
1928
1929 for (i = 0; name[i]; i++) {
1930 if (isalnum(name[i]) || (name[i] == '.')
1931 || (name[i] == '_'))
1932 name[j++] = name[i];
1933 else if (name[i] == '-')
1934 name[j++] = '_';
1935 }
1936
1937 name[j] = '\0';
1938 }
1939
1940 /**
1941 * snd_soc_set_dmi_name() - Register DMI names to card
1942 * @card: The card to register DMI names
1943 * @flavour: The flavour "differentiator" for the card amongst its peers.
1944 *
1945 * An Intel machine driver may be used by many different devices but are
1946 * difficult for userspace to differentiate, since machine drivers ususally
1947 * use their own name as the card short name and leave the card long name
1948 * blank. To differentiate such devices and fix bugs due to lack of
1949 * device-specific configurations, this function allows DMI info to be used
1950 * as the sound card long name, in the format of
1951 * "vendor-product-version-board"
1952 * (Character '-' is used to separate different DMI fields here).
1953 * This will help the user space to load the device-specific Use Case Manager
1954 * (UCM) configurations for the card.
1955 *
1956 * Possible card long names may be:
1957 * DellInc.-XPS139343-01-0310JH
1958 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1959 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1960 *
1961 * This function also supports flavoring the card longname to provide
1962 * the extra differentiation, like "vendor-product-version-board-flavor".
1963 *
1964 * We only keep number and alphabet characters and a few separator characters
1965 * in the card long name since UCM in the user space uses the card long names
1966 * as card configuration directory names and AudoConf cannot support special
1967 * charactors like SPACE.
1968 *
1969 * Returns 0 on success, otherwise a negative error code.
1970 */
1971 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1972 {
1973 const char *vendor, *product, *product_version, *board;
1974 size_t longname_buf_size = sizeof(card->snd_card->longname);
1975 size_t len;
1976
1977 if (card->long_name)
1978 return 0; /* long name already set by driver or from DMI */
1979
1980 /* make up dmi long name as: vendor.product.version.board */
1981 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1982 if (!vendor) {
1983 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1984 return 0;
1985 }
1986
1987 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1988 "%s", vendor);
1989 cleanup_dmi_name(card->dmi_longname);
1990
1991 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1992 if (product) {
1993 len = strlen(card->dmi_longname);
1994 snprintf(card->dmi_longname + len,
1995 longname_buf_size - len,
1996 "-%s", product);
1997
1998 len++; /* skip the separator "-" */
1999 if (len < longname_buf_size)
2000 cleanup_dmi_name(card->dmi_longname + len);
2001
2002 /* some vendors like Lenovo may only put a self-explanatory
2003 * name in the product version field
2004 */
2005 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
2006 if (product_version) {
2007 len = strlen(card->dmi_longname);
2008 snprintf(card->dmi_longname + len,
2009 longname_buf_size - len,
2010 "-%s", product_version);
2011
2012 len++;
2013 if (len < longname_buf_size)
2014 cleanup_dmi_name(card->dmi_longname + len);
2015 }
2016 }
2017
2018 board = dmi_get_system_info(DMI_BOARD_NAME);
2019 if (board) {
2020 len = strlen(card->dmi_longname);
2021 snprintf(card->dmi_longname + len,
2022 longname_buf_size - len,
2023 "-%s", board);
2024
2025 len++;
2026 if (len < longname_buf_size)
2027 cleanup_dmi_name(card->dmi_longname + len);
2028 } else if (!product) {
2029 /* fall back to using legacy name */
2030 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
2031 return 0;
2032 }
2033
2034 /* Add flavour to dmi long name */
2035 if (flavour) {
2036 len = strlen(card->dmi_longname);
2037 snprintf(card->dmi_longname + len,
2038 longname_buf_size - len,
2039 "-%s", flavour);
2040
2041 len++;
2042 if (len < longname_buf_size)
2043 cleanup_dmi_name(card->dmi_longname + len);
2044 }
2045
2046 /* set the card long name */
2047 card->long_name = card->dmi_longname;
2048
2049 return 0;
2050 }
2051 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
2052
2053 static int snd_soc_instantiate_card(struct snd_soc_card *card)
2054 {
2055 struct snd_soc_codec *codec;
2056 struct snd_soc_pcm_runtime *rtd;
2057 struct snd_soc_dai_link *dai_link;
2058 int ret, i, order;
2059
2060 mutex_lock(&client_mutex);
2061 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2062
2063 /* bind DAIs */
2064 for (i = 0; i < card->num_links; i++) {
2065 ret = soc_bind_dai_link(card, &card->dai_link[i]);
2066 if (ret != 0)
2067 goto base_error;
2068 }
2069
2070 /* bind aux_devs too */
2071 for (i = 0; i < card->num_aux_devs; i++) {
2072 ret = soc_bind_aux_dev(card, i);
2073 if (ret != 0)
2074 goto base_error;
2075 }
2076
2077 /* add predefined DAI links to the list */
2078 for (i = 0; i < card->num_links; i++)
2079 snd_soc_add_dai_link(card, card->dai_link+i);
2080
2081 /* initialize the register cache for each available codec */
2082 list_for_each_entry(codec, &codec_list, list) {
2083 if (codec->cache_init)
2084 continue;
2085 ret = snd_soc_init_codec_cache(codec);
2086 if (ret < 0)
2087 goto base_error;
2088 }
2089
2090 /* card bind complete so register a sound card */
2091 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2092 card->owner, 0, &card->snd_card);
2093 if (ret < 0) {
2094 dev_err(card->dev,
2095 "ASoC: can't create sound card for card %s: %d\n",
2096 card->name, ret);
2097 goto base_error;
2098 }
2099
2100 soc_init_card_debugfs(card);
2101
2102 card->dapm.bias_level = SND_SOC_BIAS_OFF;
2103 card->dapm.dev = card->dev;
2104 card->dapm.card = card;
2105 list_add(&card->dapm.list, &card->dapm_list);
2106
2107 #ifdef CONFIG_DEBUG_FS
2108 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2109 #endif
2110
2111 #ifdef CONFIG_PM_SLEEP
2112 /* deferred resume work */
2113 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2114 #endif
2115
2116 if (card->dapm_widgets)
2117 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2118 card->num_dapm_widgets);
2119
2120 if (card->of_dapm_widgets)
2121 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2122 card->num_of_dapm_widgets);
2123
2124 /* initialise the sound card only once */
2125 if (card->probe) {
2126 ret = card->probe(card);
2127 if (ret < 0)
2128 goto card_probe_error;
2129 }
2130
2131 /* probe all components used by DAI links on this card */
2132 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2133 order++) {
2134 list_for_each_entry(rtd, &card->rtd_list, list) {
2135 ret = soc_probe_link_components(card, rtd, order);
2136 if (ret < 0) {
2137 dev_err(card->dev,
2138 "ASoC: failed to instantiate card %d\n",
2139 ret);
2140 goto probe_dai_err;
2141 }
2142 }
2143 }
2144
2145 /* probe auxiliary components */
2146 ret = soc_probe_aux_devices(card);
2147 if (ret < 0)
2148 goto probe_dai_err;
2149
2150 /* Find new DAI links added during probing components and bind them.
2151 * Components with topology may bring new DAIs and DAI links.
2152 */
2153 list_for_each_entry(dai_link, &card->dai_link_list, list) {
2154 if (soc_is_dai_link_bound(card, dai_link))
2155 continue;
2156
2157 ret = soc_init_dai_link(card, dai_link);
2158 if (ret)
2159 goto probe_dai_err;
2160 ret = soc_bind_dai_link(card, dai_link);
2161 if (ret)
2162 goto probe_dai_err;
2163 }
2164
2165 /* probe all DAI links on this card */
2166 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2167 order++) {
2168 list_for_each_entry(rtd, &card->rtd_list, list) {
2169 ret = soc_probe_link_dais(card, rtd, order);
2170 if (ret < 0) {
2171 dev_err(card->dev,
2172 "ASoC: failed to instantiate card %d\n",
2173 ret);
2174 goto probe_dai_err;
2175 }
2176 }
2177 }
2178
2179 snd_soc_dapm_link_dai_widgets(card);
2180 snd_soc_dapm_connect_dai_link_widgets(card);
2181
2182 if (card->controls)
2183 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2184
2185 if (card->dapm_routes)
2186 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2187 card->num_dapm_routes);
2188
2189 if (card->of_dapm_routes)
2190 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2191 card->num_of_dapm_routes);
2192
2193 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2194 "%s", card->name);
2195 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2196 "%s", card->long_name ? card->long_name : card->name);
2197 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2198 "%s", card->driver_name ? card->driver_name : card->name);
2199 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2200 switch (card->snd_card->driver[i]) {
2201 case '_':
2202 case '-':
2203 case '\0':
2204 break;
2205 default:
2206 if (!isalnum(card->snd_card->driver[i]))
2207 card->snd_card->driver[i] = '_';
2208 break;
2209 }
2210 }
2211
2212 if (card->late_probe) {
2213 ret = card->late_probe(card);
2214 if (ret < 0) {
2215 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2216 card->name, ret);
2217 goto probe_aux_dev_err;
2218 }
2219 }
2220
2221 snd_soc_dapm_new_widgets(card);
2222
2223 ret = snd_card_register(card->snd_card);
2224 if (ret < 0) {
2225 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2226 ret);
2227 goto probe_aux_dev_err;
2228 }
2229
2230 card->instantiated = 1;
2231 snd_soc_dapm_sync(&card->dapm);
2232 mutex_unlock(&card->mutex);
2233 mutex_unlock(&client_mutex);
2234
2235 return 0;
2236
2237 probe_aux_dev_err:
2238 soc_remove_aux_devices(card);
2239
2240 probe_dai_err:
2241 soc_remove_dai_links(card);
2242
2243 card_probe_error:
2244 if (card->remove)
2245 card->remove(card);
2246
2247 snd_soc_dapm_free(&card->dapm);
2248 soc_cleanup_card_debugfs(card);
2249 snd_card_free(card->snd_card);
2250
2251 base_error:
2252 soc_remove_pcm_runtimes(card);
2253 mutex_unlock(&card->mutex);
2254 mutex_unlock(&client_mutex);
2255
2256 return ret;
2257 }
2258
2259 /* probes a new socdev */
2260 static int soc_probe(struct platform_device *pdev)
2261 {
2262 struct snd_soc_card *card = platform_get_drvdata(pdev);
2263
2264 /*
2265 * no card, so machine driver should be registering card
2266 * we should not be here in that case so ret error
2267 */
2268 if (!card)
2269 return -EINVAL;
2270
2271 dev_warn(&pdev->dev,
2272 "ASoC: machine %s should use snd_soc_register_card()\n",
2273 card->name);
2274
2275 /* Bodge while we unpick instantiation */
2276 card->dev = &pdev->dev;
2277
2278 return snd_soc_register_card(card);
2279 }
2280
2281 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2282 {
2283 struct snd_soc_pcm_runtime *rtd;
2284
2285 /* make sure any delayed work runs */
2286 list_for_each_entry(rtd, &card->rtd_list, list)
2287 flush_delayed_work(&rtd->delayed_work);
2288
2289 /* remove and free each DAI */
2290 soc_remove_dai_links(card);
2291 soc_remove_pcm_runtimes(card);
2292
2293 /* remove auxiliary devices */
2294 soc_remove_aux_devices(card);
2295
2296 snd_soc_dapm_free(&card->dapm);
2297 soc_cleanup_card_debugfs(card);
2298
2299 /* remove the card */
2300 if (card->remove)
2301 card->remove(card);
2302
2303 snd_card_free(card->snd_card);
2304 return 0;
2305
2306 }
2307
2308 /* removes a socdev */
2309 static int soc_remove(struct platform_device *pdev)
2310 {
2311 struct snd_soc_card *card = platform_get_drvdata(pdev);
2312
2313 snd_soc_unregister_card(card);
2314 return 0;
2315 }
2316
2317 int snd_soc_poweroff(struct device *dev)
2318 {
2319 struct snd_soc_card *card = dev_get_drvdata(dev);
2320 struct snd_soc_pcm_runtime *rtd;
2321
2322 if (!card->instantiated)
2323 return 0;
2324
2325 /* Flush out pmdown_time work - we actually do want to run it
2326 * now, we're shutting down so no imminent restart. */
2327 list_for_each_entry(rtd, &card->rtd_list, list)
2328 flush_delayed_work(&rtd->delayed_work);
2329
2330 snd_soc_dapm_shutdown(card);
2331
2332 /* deactivate pins to sleep state */
2333 list_for_each_entry(rtd, &card->rtd_list, list) {
2334 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2335 int i;
2336
2337 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2338 for (i = 0; i < rtd->num_codecs; i++) {
2339 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2340 pinctrl_pm_select_sleep_state(codec_dai->dev);
2341 }
2342 }
2343
2344 return 0;
2345 }
2346 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2347
2348 const struct dev_pm_ops snd_soc_pm_ops = {
2349 .suspend = snd_soc_suspend,
2350 .resume = snd_soc_resume,
2351 .freeze = snd_soc_suspend,
2352 .thaw = snd_soc_resume,
2353 .poweroff = snd_soc_poweroff,
2354 .restore = snd_soc_resume,
2355 };
2356 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2357
2358 /* ASoC platform driver */
2359 static struct platform_driver soc_driver = {
2360 .driver = {
2361 .name = "soc-audio",
2362 .pm = &snd_soc_pm_ops,
2363 },
2364 .probe = soc_probe,
2365 .remove = soc_remove,
2366 };
2367
2368 /**
2369 * snd_soc_cnew - create new control
2370 * @_template: control template
2371 * @data: control private data
2372 * @long_name: control long name
2373 * @prefix: control name prefix
2374 *
2375 * Create a new mixer control from a template control.
2376 *
2377 * Returns 0 for success, else error.
2378 */
2379 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2380 void *data, const char *long_name,
2381 const char *prefix)
2382 {
2383 struct snd_kcontrol_new template;
2384 struct snd_kcontrol *kcontrol;
2385 char *name = NULL;
2386
2387 memcpy(&template, _template, sizeof(template));
2388 template.index = 0;
2389
2390 if (!long_name)
2391 long_name = template.name;
2392
2393 if (prefix) {
2394 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2395 if (!name)
2396 return NULL;
2397
2398 template.name = name;
2399 } else {
2400 template.name = long_name;
2401 }
2402
2403 kcontrol = snd_ctl_new1(&template, data);
2404
2405 kfree(name);
2406
2407 return kcontrol;
2408 }
2409 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2410
2411 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2412 const struct snd_kcontrol_new *controls, int num_controls,
2413 const char *prefix, void *data)
2414 {
2415 int err, i;
2416
2417 for (i = 0; i < num_controls; i++) {
2418 const struct snd_kcontrol_new *control = &controls[i];
2419 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2420 control->name, prefix));
2421 if (err < 0) {
2422 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2423 control->name, err);
2424 return err;
2425 }
2426 }
2427
2428 return 0;
2429 }
2430
2431 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2432 const char *name)
2433 {
2434 struct snd_card *card = soc_card->snd_card;
2435 struct snd_kcontrol *kctl;
2436
2437 if (unlikely(!name))
2438 return NULL;
2439
2440 list_for_each_entry(kctl, &card->controls, list)
2441 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2442 return kctl;
2443 return NULL;
2444 }
2445 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2446
2447 /**
2448 * snd_soc_add_component_controls - Add an array of controls to a component.
2449 *
2450 * @component: Component to add controls to
2451 * @controls: Array of controls to add
2452 * @num_controls: Number of elements in the array
2453 *
2454 * Return: 0 for success, else error.
2455 */
2456 int snd_soc_add_component_controls(struct snd_soc_component *component,
2457 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2458 {
2459 struct snd_card *card = component->card->snd_card;
2460
2461 return snd_soc_add_controls(card, component->dev, controls,
2462 num_controls, component->name_prefix, component);
2463 }
2464 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2465
2466 /**
2467 * snd_soc_add_codec_controls - add an array of controls to a codec.
2468 * Convenience function to add a list of controls. Many codecs were
2469 * duplicating this code.
2470 *
2471 * @codec: codec to add controls to
2472 * @controls: array of controls to add
2473 * @num_controls: number of elements in the array
2474 *
2475 * Return 0 for success, else error.
2476 */
2477 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2478 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2479 {
2480 return snd_soc_add_component_controls(&codec->component, controls,
2481 num_controls);
2482 }
2483 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2484
2485 /**
2486 * snd_soc_add_platform_controls - add an array of controls to a platform.
2487 * Convenience function to add a list of controls.
2488 *
2489 * @platform: platform to add controls to
2490 * @controls: array of controls to add
2491 * @num_controls: number of elements in the array
2492 *
2493 * Return 0 for success, else error.
2494 */
2495 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2496 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2497 {
2498 return snd_soc_add_component_controls(&platform->component, controls,
2499 num_controls);
2500 }
2501 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2502
2503 /**
2504 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2505 * Convenience function to add a list of controls.
2506 *
2507 * @soc_card: SoC card to add controls to
2508 * @controls: array of controls to add
2509 * @num_controls: number of elements in the array
2510 *
2511 * Return 0 for success, else error.
2512 */
2513 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2514 const struct snd_kcontrol_new *controls, int num_controls)
2515 {
2516 struct snd_card *card = soc_card->snd_card;
2517
2518 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2519 NULL, soc_card);
2520 }
2521 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2522
2523 /**
2524 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2525 * Convienience function to add a list of controls.
2526 *
2527 * @dai: DAI to add controls to
2528 * @controls: array of controls to add
2529 * @num_controls: number of elements in the array
2530 *
2531 * Return 0 for success, else error.
2532 */
2533 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2534 const struct snd_kcontrol_new *controls, int num_controls)
2535 {
2536 struct snd_card *card = dai->component->card->snd_card;
2537
2538 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2539 NULL, dai);
2540 }
2541 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2542
2543 /**
2544 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2545 * @dai: DAI
2546 * @clk_id: DAI specific clock ID
2547 * @freq: new clock frequency in Hz
2548 * @dir: new clock direction - input/output.
2549 *
2550 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2551 */
2552 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2553 unsigned int freq, int dir)
2554 {
2555 if (dai->driver && dai->driver->ops->set_sysclk)
2556 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2557 else if (dai->codec && dai->codec->driver->set_sysclk)
2558 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2559 freq, dir);
2560 else
2561 return -ENOTSUPP;
2562 }
2563 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2564
2565 /**
2566 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2567 * @codec: CODEC
2568 * @clk_id: DAI specific clock ID
2569 * @source: Source for the clock
2570 * @freq: new clock frequency in Hz
2571 * @dir: new clock direction - input/output.
2572 *
2573 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2574 */
2575 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2576 int source, unsigned int freq, int dir)
2577 {
2578 if (codec->driver->set_sysclk)
2579 return codec->driver->set_sysclk(codec, clk_id, source,
2580 freq, dir);
2581 else
2582 return -ENOTSUPP;
2583 }
2584 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2585
2586 /**
2587 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2588 * @dai: DAI
2589 * @div_id: DAI specific clock divider ID
2590 * @div: new clock divisor.
2591 *
2592 * Configures the clock dividers. This is used to derive the best DAI bit and
2593 * frame clocks from the system or master clock. It's best to set the DAI bit
2594 * and frame clocks as low as possible to save system power.
2595 */
2596 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2597 int div_id, int div)
2598 {
2599 if (dai->driver && dai->driver->ops->set_clkdiv)
2600 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2601 else
2602 return -EINVAL;
2603 }
2604 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2605
2606 /**
2607 * snd_soc_dai_set_pll - configure DAI PLL.
2608 * @dai: DAI
2609 * @pll_id: DAI specific PLL ID
2610 * @source: DAI specific source for the PLL
2611 * @freq_in: PLL input clock frequency in Hz
2612 * @freq_out: requested PLL output clock frequency in Hz
2613 *
2614 * Configures and enables PLL to generate output clock based on input clock.
2615 */
2616 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2617 unsigned int freq_in, unsigned int freq_out)
2618 {
2619 if (dai->driver && dai->driver->ops->set_pll)
2620 return dai->driver->ops->set_pll(dai, pll_id, source,
2621 freq_in, freq_out);
2622 else if (dai->codec && dai->codec->driver->set_pll)
2623 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2624 freq_in, freq_out);
2625 else
2626 return -EINVAL;
2627 }
2628 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2629
2630 /*
2631 * snd_soc_codec_set_pll - configure codec PLL.
2632 * @codec: CODEC
2633 * @pll_id: DAI specific PLL ID
2634 * @source: DAI specific source for the PLL
2635 * @freq_in: PLL input clock frequency in Hz
2636 * @freq_out: requested PLL output clock frequency in Hz
2637 *
2638 * Configures and enables PLL to generate output clock based on input clock.
2639 */
2640 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2641 unsigned int freq_in, unsigned int freq_out)
2642 {
2643 if (codec->driver->set_pll)
2644 return codec->driver->set_pll(codec, pll_id, source,
2645 freq_in, freq_out);
2646 else
2647 return -EINVAL;
2648 }
2649 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2650
2651 /**
2652 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2653 * @dai: DAI
2654 * @ratio: Ratio of BCLK to Sample rate.
2655 *
2656 * Configures the DAI for a preset BCLK to sample rate ratio.
2657 */
2658 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2659 {
2660 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2661 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2662 else
2663 return -EINVAL;
2664 }
2665 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2666
2667 /**
2668 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2669 * @dai: DAI
2670 * @fmt: SND_SOC_DAIFMT_ format value.
2671 *
2672 * Configures the DAI hardware format and clocking.
2673 */
2674 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2675 {
2676 if (dai->driver == NULL)
2677 return -EINVAL;
2678 if (dai->driver->ops->set_fmt == NULL)
2679 return -ENOTSUPP;
2680 return dai->driver->ops->set_fmt(dai, fmt);
2681 }
2682 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2683
2684 /**
2685 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2686 * @slots: Number of slots in use.
2687 * @tx_mask: bitmask representing active TX slots.
2688 * @rx_mask: bitmask representing active RX slots.
2689 *
2690 * Generates the TDM tx and rx slot default masks for DAI.
2691 */
2692 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2693 unsigned int *tx_mask,
2694 unsigned int *rx_mask)
2695 {
2696 if (*tx_mask || *rx_mask)
2697 return 0;
2698
2699 if (!slots)
2700 return -EINVAL;
2701
2702 *tx_mask = (1 << slots) - 1;
2703 *rx_mask = (1 << slots) - 1;
2704
2705 return 0;
2706 }
2707
2708 /**
2709 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2710 * @dai: The DAI to configure
2711 * @tx_mask: bitmask representing active TX slots.
2712 * @rx_mask: bitmask representing active RX slots.
2713 * @slots: Number of slots in use.
2714 * @slot_width: Width in bits for each slot.
2715 *
2716 * This function configures the specified DAI for TDM operation. @slot contains
2717 * the total number of slots of the TDM stream and @slot_with the width of each
2718 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2719 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2720 * DAI should write to or read from. If a bit is set the corresponding slot is
2721 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2722 * the first slot, bit 1 to the second slot and so on. The first active slot
2723 * maps to the first channel of the DAI, the second active slot to the second
2724 * channel and so on.
2725 *
2726 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2727 * @rx_mask and @slot_width will be ignored.
2728 *
2729 * Returns 0 on success, a negative error code otherwise.
2730 */
2731 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2732 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2733 {
2734 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2735 dai->driver->ops->xlate_tdm_slot_mask(slots,
2736 &tx_mask, &rx_mask);
2737 else
2738 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2739
2740 dai->tx_mask = tx_mask;
2741 dai->rx_mask = rx_mask;
2742
2743 if (dai->driver && dai->driver->ops->set_tdm_slot)
2744 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2745 slots, slot_width);
2746 else
2747 return -ENOTSUPP;
2748 }
2749 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2750
2751 /**
2752 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2753 * @dai: DAI
2754 * @tx_num: how many TX channels
2755 * @tx_slot: pointer to an array which imply the TX slot number channel
2756 * 0~num-1 uses
2757 * @rx_num: how many RX channels
2758 * @rx_slot: pointer to an array which imply the RX slot number channel
2759 * 0~num-1 uses
2760 *
2761 * configure the relationship between channel number and TDM slot number.
2762 */
2763 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2764 unsigned int tx_num, unsigned int *tx_slot,
2765 unsigned int rx_num, unsigned int *rx_slot)
2766 {
2767 if (dai->driver && dai->driver->ops->set_channel_map)
2768 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2769 rx_num, rx_slot);
2770 else
2771 return -EINVAL;
2772 }
2773 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2774
2775 /**
2776 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2777 * @dai: DAI
2778 * @tristate: tristate enable
2779 *
2780 * Tristates the DAI so that others can use it.
2781 */
2782 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2783 {
2784 if (dai->driver && dai->driver->ops->set_tristate)
2785 return dai->driver->ops->set_tristate(dai, tristate);
2786 else
2787 return -EINVAL;
2788 }
2789 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2790
2791 /**
2792 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2793 * @dai: DAI
2794 * @mute: mute enable
2795 * @direction: stream to mute
2796 *
2797 * Mutes the DAI DAC.
2798 */
2799 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2800 int direction)
2801 {
2802 if (!dai->driver)
2803 return -ENOTSUPP;
2804
2805 if (dai->driver->ops->mute_stream)
2806 return dai->driver->ops->mute_stream(dai, mute, direction);
2807 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2808 dai->driver->ops->digital_mute)
2809 return dai->driver->ops->digital_mute(dai, mute);
2810 else
2811 return -ENOTSUPP;
2812 }
2813 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2814
2815 /**
2816 * snd_soc_register_card - Register a card with the ASoC core
2817 *
2818 * @card: Card to register
2819 *
2820 */
2821 int snd_soc_register_card(struct snd_soc_card *card)
2822 {
2823 int i, ret;
2824 struct snd_soc_pcm_runtime *rtd;
2825
2826 if (!card->name || !card->dev)
2827 return -EINVAL;
2828
2829 for (i = 0; i < card->num_links; i++) {
2830 struct snd_soc_dai_link *link = &card->dai_link[i];
2831
2832 ret = soc_init_dai_link(card, link);
2833 if (ret) {
2834 dev_err(card->dev, "ASoC: failed to init link %s\n",
2835 link->name);
2836 return ret;
2837 }
2838 }
2839
2840 dev_set_drvdata(card->dev, card);
2841
2842 snd_soc_initialize_card_lists(card);
2843
2844 INIT_LIST_HEAD(&card->dai_link_list);
2845 card->num_dai_links = 0;
2846
2847 INIT_LIST_HEAD(&card->rtd_list);
2848 card->num_rtd = 0;
2849
2850 INIT_LIST_HEAD(&card->dapm_dirty);
2851 INIT_LIST_HEAD(&card->dobj_list);
2852 card->instantiated = 0;
2853 mutex_init(&card->mutex);
2854 mutex_init(&card->dapm_mutex);
2855
2856 ret = snd_soc_instantiate_card(card);
2857 if (ret != 0)
2858 return ret;
2859
2860 /* deactivate pins to sleep state */
2861 list_for_each_entry(rtd, &card->rtd_list, list) {
2862 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2863 int j;
2864
2865 for (j = 0; j < rtd->num_codecs; j++) {
2866 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2867 if (!codec_dai->active)
2868 pinctrl_pm_select_sleep_state(codec_dai->dev);
2869 }
2870
2871 if (!cpu_dai->active)
2872 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2873 }
2874
2875 return ret;
2876 }
2877 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2878
2879 /**
2880 * snd_soc_unregister_card - Unregister a card with the ASoC core
2881 *
2882 * @card: Card to unregister
2883 *
2884 */
2885 int snd_soc_unregister_card(struct snd_soc_card *card)
2886 {
2887 if (card->instantiated) {
2888 card->instantiated = false;
2889 snd_soc_dapm_shutdown(card);
2890 soc_cleanup_card_resources(card);
2891 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2892 }
2893
2894 return 0;
2895 }
2896 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2897
2898 /*
2899 * Simplify DAI link configuration by removing ".-1" from device names
2900 * and sanitizing names.
2901 */
2902 static char *fmt_single_name(struct device *dev, int *id)
2903 {
2904 char *found, name[NAME_SIZE];
2905 int id1, id2;
2906
2907 if (dev_name(dev) == NULL)
2908 return NULL;
2909
2910 strlcpy(name, dev_name(dev), NAME_SIZE);
2911
2912 /* are we a "%s.%d" name (platform and SPI components) */
2913 found = strstr(name, dev->driver->name);
2914 if (found) {
2915 /* get ID */
2916 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2917
2918 /* discard ID from name if ID == -1 */
2919 if (*id == -1)
2920 found[strlen(dev->driver->name)] = '\0';
2921 }
2922
2923 } else {
2924 /* I2C component devices are named "bus-addr" */
2925 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2926 char tmp[NAME_SIZE];
2927
2928 /* create unique ID number from I2C addr and bus */
2929 *id = ((id1 & 0xffff) << 16) + id2;
2930
2931 /* sanitize component name for DAI link creation */
2932 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2933 strlcpy(name, tmp, NAME_SIZE);
2934 } else
2935 *id = 0;
2936 }
2937
2938 return kstrdup(name, GFP_KERNEL);
2939 }
2940
2941 /*
2942 * Simplify DAI link naming for single devices with multiple DAIs by removing
2943 * any ".-1" and using the DAI name (instead of device name).
2944 */
2945 static inline char *fmt_multiple_name(struct device *dev,
2946 struct snd_soc_dai_driver *dai_drv)
2947 {
2948 if (dai_drv->name == NULL) {
2949 dev_err(dev,
2950 "ASoC: error - multiple DAI %s registered with no name\n",
2951 dev_name(dev));
2952 return NULL;
2953 }
2954
2955 return kstrdup(dai_drv->name, GFP_KERNEL);
2956 }
2957
2958 /**
2959 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2960 *
2961 * @component: The component for which the DAIs should be unregistered
2962 */
2963 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2964 {
2965 struct snd_soc_dai *dai, *_dai;
2966
2967 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2968 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2969 dai->name);
2970 list_del(&dai->list);
2971 kfree(dai->name);
2972 kfree(dai);
2973 }
2974 }
2975
2976 /* Create a DAI and add it to the component's DAI list */
2977 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2978 struct snd_soc_dai_driver *dai_drv,
2979 bool legacy_dai_naming)
2980 {
2981 struct device *dev = component->dev;
2982 struct snd_soc_dai *dai;
2983
2984 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2985
2986 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2987 if (dai == NULL)
2988 return NULL;
2989
2990 /*
2991 * Back in the old days when we still had component-less DAIs,
2992 * instead of having a static name, component-less DAIs would
2993 * inherit the name of the parent device so it is possible to
2994 * register multiple instances of the DAI. We still need to keep
2995 * the same naming style even though those DAIs are not
2996 * component-less anymore.
2997 */
2998 if (legacy_dai_naming &&
2999 (dai_drv->id == 0 || dai_drv->name == NULL)) {
3000 dai->name = fmt_single_name(dev, &dai->id);
3001 } else {
3002 dai->name = fmt_multiple_name(dev, dai_drv);
3003 if (dai_drv->id)
3004 dai->id = dai_drv->id;
3005 else
3006 dai->id = component->num_dai;
3007 }
3008 if (dai->name == NULL) {
3009 kfree(dai);
3010 return NULL;
3011 }
3012
3013 dai->component = component;
3014 dai->dev = dev;
3015 dai->driver = dai_drv;
3016 if (!dai->driver->ops)
3017 dai->driver->ops = &null_dai_ops;
3018
3019 list_add(&dai->list, &component->dai_list);
3020 component->num_dai++;
3021
3022 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3023 return dai;
3024 }
3025
3026 /**
3027 * snd_soc_register_dais - Register a DAI with the ASoC core
3028 *
3029 * @component: The component the DAIs are registered for
3030 * @dai_drv: DAI driver to use for the DAIs
3031 * @count: Number of DAIs
3032 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3033 * parent's name.
3034 */
3035 static int snd_soc_register_dais(struct snd_soc_component *component,
3036 struct snd_soc_dai_driver *dai_drv, size_t count,
3037 bool legacy_dai_naming)
3038 {
3039 struct device *dev = component->dev;
3040 struct snd_soc_dai *dai;
3041 unsigned int i;
3042 int ret;
3043
3044 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
3045
3046 component->dai_drv = dai_drv;
3047
3048 for (i = 0; i < count; i++) {
3049
3050 dai = soc_add_dai(component, dai_drv + i,
3051 count == 1 && legacy_dai_naming);
3052 if (dai == NULL) {
3053 ret = -ENOMEM;
3054 goto err;
3055 }
3056 }
3057
3058 return 0;
3059
3060 err:
3061 snd_soc_unregister_dais(component);
3062
3063 return ret;
3064 }
3065
3066 /**
3067 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
3068 *
3069 * @component: The component the DAIs are registered for
3070 * @dai_drv: DAI driver to use for the DAI
3071 *
3072 * Topology can use this API to register DAIs when probing a component.
3073 * These DAIs's widgets will be freed in the card cleanup and the DAIs
3074 * will be freed in the component cleanup.
3075 */
3076 int snd_soc_register_dai(struct snd_soc_component *component,
3077 struct snd_soc_dai_driver *dai_drv)
3078 {
3079 struct snd_soc_dapm_context *dapm =
3080 snd_soc_component_get_dapm(component);
3081 struct snd_soc_dai *dai;
3082 int ret;
3083
3084 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
3085 dev_err(component->dev, "Invalid dai type %d\n",
3086 dai_drv->dobj.type);
3087 return -EINVAL;
3088 }
3089
3090 lockdep_assert_held(&client_mutex);
3091 dai = soc_add_dai(component, dai_drv, false);
3092 if (!dai)
3093 return -ENOMEM;
3094
3095 /* Create the DAI widgets here. After adding DAIs, topology may
3096 * also add routes that need these widgets as source or sink.
3097 */
3098 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
3099 if (ret != 0) {
3100 dev_err(component->dev,
3101 "Failed to create DAI widgets %d\n", ret);
3102 }
3103
3104 return ret;
3105 }
3106 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3107
3108 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
3109 enum snd_soc_dapm_type type, int subseq)
3110 {
3111 struct snd_soc_component *component = dapm->component;
3112
3113 component->driver->seq_notifier(component, type, subseq);
3114 }
3115
3116 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3117 int event)
3118 {
3119 struct snd_soc_component *component = dapm->component;
3120
3121 return component->driver->stream_event(component, event);
3122 }
3123
3124 static int snd_soc_component_initialize(struct snd_soc_component *component,
3125 const struct snd_soc_component_driver *driver, struct device *dev)
3126 {
3127 struct snd_soc_dapm_context *dapm;
3128
3129 component->name = fmt_single_name(dev, &component->id);
3130 if (!component->name) {
3131 dev_err(dev, "ASoC: Failed to allocate name\n");
3132 return -ENOMEM;
3133 }
3134
3135 component->dev = dev;
3136 component->driver = driver;
3137 component->probe = component->driver->probe;
3138 component->remove = component->driver->remove;
3139 component->suspend = component->driver->suspend;
3140 component->resume = component->driver->resume;
3141 component->pcm_new = component->driver->pcm_new;
3142 component->pcm_free= component->driver->pcm_free;
3143
3144 dapm = &component->dapm;
3145 dapm->dev = dev;
3146 dapm->component = component;
3147 dapm->bias_level = SND_SOC_BIAS_OFF;
3148 dapm->idle_bias_off = true;
3149 if (driver->seq_notifier)
3150 dapm->seq_notifier = snd_soc_component_seq_notifier;
3151 if (driver->stream_event)
3152 dapm->stream_event = snd_soc_component_stream_event;
3153
3154 component->controls = driver->controls;
3155 component->num_controls = driver->num_controls;
3156 component->dapm_widgets = driver->dapm_widgets;
3157 component->num_dapm_widgets = driver->num_dapm_widgets;
3158 component->dapm_routes = driver->dapm_routes;
3159 component->num_dapm_routes = driver->num_dapm_routes;
3160
3161 INIT_LIST_HEAD(&component->dai_list);
3162 mutex_init(&component->io_mutex);
3163
3164 return 0;
3165 }
3166
3167 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3168 {
3169 int val_bytes = regmap_get_val_bytes(component->regmap);
3170
3171 /* Errors are legitimate for non-integer byte multiples */
3172 if (val_bytes > 0)
3173 component->val_bytes = val_bytes;
3174 }
3175
3176 #ifdef CONFIG_REGMAP
3177
3178 /**
3179 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3180 * @component: The component for which to initialize the regmap instance
3181 * @regmap: The regmap instance that should be used by the component
3182 *
3183 * This function allows deferred assignment of the regmap instance that is
3184 * associated with the component. Only use this if the regmap instance is not
3185 * yet ready when the component is registered. The function must also be called
3186 * before the first IO attempt of the component.
3187 */
3188 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3189 struct regmap *regmap)
3190 {
3191 component->regmap = regmap;
3192 snd_soc_component_setup_regmap(component);
3193 }
3194 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3195
3196 /**
3197 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3198 * @component: The component for which to de-initialize the regmap instance
3199 *
3200 * Calls regmap_exit() on the regmap instance associated to the component and
3201 * removes the regmap instance from the component.
3202 *
3203 * This function should only be used if snd_soc_component_init_regmap() was used
3204 * to initialize the regmap instance.
3205 */
3206 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3207 {
3208 regmap_exit(component->regmap);
3209 component->regmap = NULL;
3210 }
3211 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3212
3213 #endif
3214
3215 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3216 {
3217 if (!component->write && !component->read) {
3218 if (!component->regmap)
3219 component->regmap = dev_get_regmap(component->dev, NULL);
3220 if (component->regmap)
3221 snd_soc_component_setup_regmap(component);
3222 }
3223
3224 list_add(&component->list, &component_list);
3225 INIT_LIST_HEAD(&component->dobj_list);
3226 }
3227
3228 static void snd_soc_component_add(struct snd_soc_component *component)
3229 {
3230 mutex_lock(&client_mutex);
3231 snd_soc_component_add_unlocked(component);
3232 mutex_unlock(&client_mutex);
3233 }
3234
3235 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3236 {
3237 snd_soc_unregister_dais(component);
3238 kfree(component->name);
3239 }
3240
3241 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3242 {
3243 list_del(&component->list);
3244 }
3245
3246 int snd_soc_register_component(struct device *dev,
3247 const struct snd_soc_component_driver *cmpnt_drv,
3248 struct snd_soc_dai_driver *dai_drv,
3249 int num_dai)
3250 {
3251 struct snd_soc_component *cmpnt;
3252 int ret;
3253
3254 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
3255 if (!cmpnt) {
3256 dev_err(dev, "ASoC: Failed to allocate memory\n");
3257 return -ENOMEM;
3258 }
3259
3260 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
3261 if (ret)
3262 goto err_free;
3263
3264 cmpnt->ignore_pmdown_time = true;
3265 cmpnt->registered_as_component = true;
3266
3267 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
3268 if (ret < 0) {
3269 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3270 goto err_cleanup;
3271 }
3272
3273 snd_soc_component_add(cmpnt);
3274
3275 return 0;
3276
3277 err_cleanup:
3278 snd_soc_component_cleanup(cmpnt);
3279 err_free:
3280 kfree(cmpnt);
3281 return ret;
3282 }
3283 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3284
3285 /**
3286 * snd_soc_unregister_component - Unregister a component from the ASoC core
3287 *
3288 * @dev: The device to unregister
3289 */
3290 void snd_soc_unregister_component(struct device *dev)
3291 {
3292 struct snd_soc_component *cmpnt;
3293
3294 mutex_lock(&client_mutex);
3295 list_for_each_entry(cmpnt, &component_list, list) {
3296 if (dev == cmpnt->dev && cmpnt->registered_as_component)
3297 goto found;
3298 }
3299 mutex_unlock(&client_mutex);
3300 return;
3301
3302 found:
3303 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
3304 snd_soc_component_del_unlocked(cmpnt);
3305 mutex_unlock(&client_mutex);
3306 snd_soc_component_cleanup(cmpnt);
3307 kfree(cmpnt);
3308 }
3309 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3310
3311 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3312 {
3313 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3314
3315 return platform->driver->probe(platform);
3316 }
3317
3318 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3319 {
3320 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3321
3322 platform->driver->remove(platform);
3323 }
3324
3325 static int snd_soc_platform_drv_pcm_new(struct snd_soc_pcm_runtime *rtd)
3326 {
3327 struct snd_soc_platform *platform = rtd->platform;
3328
3329 return platform->driver->pcm_new(rtd);
3330 }
3331
3332 static void snd_soc_platform_drv_pcm_free(struct snd_pcm *pcm)
3333 {
3334 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
3335 struct snd_soc_platform *platform = rtd->platform;
3336
3337 platform->driver->pcm_free(pcm);
3338 }
3339
3340 /**
3341 * snd_soc_add_platform - Add a platform to the ASoC core
3342 * @dev: The parent device for the platform
3343 * @platform: The platform to add
3344 * @platform_drv: The driver for the platform
3345 */
3346 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3347 const struct snd_soc_platform_driver *platform_drv)
3348 {
3349 int ret;
3350
3351 ret = snd_soc_component_initialize(&platform->component,
3352 &platform_drv->component_driver, dev);
3353 if (ret)
3354 return ret;
3355
3356 platform->dev = dev;
3357 platform->driver = platform_drv;
3358
3359 if (platform_drv->probe)
3360 platform->component.probe = snd_soc_platform_drv_probe;
3361 if (platform_drv->remove)
3362 platform->component.remove = snd_soc_platform_drv_remove;
3363 if (platform_drv->pcm_new)
3364 platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
3365 if (platform_drv->pcm_free)
3366 platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
3367
3368 #ifdef CONFIG_DEBUG_FS
3369 platform->component.debugfs_prefix = "platform";
3370 #endif
3371
3372 mutex_lock(&client_mutex);
3373 snd_soc_component_add_unlocked(&platform->component);
3374 list_add(&platform->list, &platform_list);
3375 mutex_unlock(&client_mutex);
3376
3377 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3378 platform->component.name);
3379
3380 return 0;
3381 }
3382 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3383
3384 /**
3385 * snd_soc_register_platform - Register a platform with the ASoC core
3386 *
3387 * @dev: The device for the platform
3388 * @platform_drv: The driver for the platform
3389 */
3390 int snd_soc_register_platform(struct device *dev,
3391 const struct snd_soc_platform_driver *platform_drv)
3392 {
3393 struct snd_soc_platform *platform;
3394 int ret;
3395
3396 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3397
3398 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3399 if (platform == NULL)
3400 return -ENOMEM;
3401
3402 ret = snd_soc_add_platform(dev, platform, platform_drv);
3403 if (ret)
3404 kfree(platform);
3405
3406 return ret;
3407 }
3408 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3409
3410 /**
3411 * snd_soc_remove_platform - Remove a platform from the ASoC core
3412 * @platform: the platform to remove
3413 */
3414 void snd_soc_remove_platform(struct snd_soc_platform *platform)
3415 {
3416
3417 mutex_lock(&client_mutex);
3418 list_del(&platform->list);
3419 snd_soc_component_del_unlocked(&platform->component);
3420 mutex_unlock(&client_mutex);
3421
3422 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3423 platform->component.name);
3424
3425 snd_soc_component_cleanup(&platform->component);
3426 }
3427 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3428
3429 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3430 {
3431 struct snd_soc_platform *platform;
3432
3433 mutex_lock(&client_mutex);
3434 list_for_each_entry(platform, &platform_list, list) {
3435 if (dev == platform->dev) {
3436 mutex_unlock(&client_mutex);
3437 return platform;
3438 }
3439 }
3440 mutex_unlock(&client_mutex);
3441
3442 return NULL;
3443 }
3444 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3445
3446 /**
3447 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3448 *
3449 * @dev: platform to unregister
3450 */
3451 void snd_soc_unregister_platform(struct device *dev)
3452 {
3453 struct snd_soc_platform *platform;
3454
3455 platform = snd_soc_lookup_platform(dev);
3456 if (!platform)
3457 return;
3458
3459 snd_soc_remove_platform(platform);
3460 kfree(platform);
3461 }
3462 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3463
3464 static u64 codec_format_map[] = {
3465 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3466 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3467 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3468 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3469 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3470 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3471 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3472 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3473 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3474 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3475 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3476 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3477 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3478 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3479 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3480 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3481 };
3482
3483 /* Fix up the DAI formats for endianness: codecs don't actually see
3484 * the endianness of the data but we're using the CPU format
3485 * definitions which do need to include endianness so we ensure that
3486 * codec DAIs always have both big and little endian variants set.
3487 */
3488 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3489 {
3490 int i;
3491
3492 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3493 if (stream->formats & codec_format_map[i])
3494 stream->formats |= codec_format_map[i];
3495 }
3496
3497 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3498 {
3499 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3500
3501 return codec->driver->probe(codec);
3502 }
3503
3504 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3505 {
3506 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3507
3508 codec->driver->remove(codec);
3509 }
3510
3511 static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3512 {
3513 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3514
3515 return codec->driver->suspend(codec);
3516 }
3517
3518 static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3519 {
3520 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3521
3522 return codec->driver->resume(codec);
3523 }
3524
3525 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3526 unsigned int reg, unsigned int val)
3527 {
3528 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3529
3530 return codec->driver->write(codec, reg, val);
3531 }
3532
3533 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3534 unsigned int reg, unsigned int *val)
3535 {
3536 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3537
3538 *val = codec->driver->read(codec, reg);
3539
3540 return 0;
3541 }
3542
3543 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3544 enum snd_soc_bias_level level)
3545 {
3546 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3547
3548 return codec->driver->set_bias_level(codec, level);
3549 }
3550
3551 /**
3552 * snd_soc_register_codec - Register a codec with the ASoC core
3553 *
3554 * @dev: The parent device for this codec
3555 * @codec_drv: Codec driver
3556 * @dai_drv: The associated DAI driver
3557 * @num_dai: Number of DAIs
3558 */
3559 int snd_soc_register_codec(struct device *dev,
3560 const struct snd_soc_codec_driver *codec_drv,
3561 struct snd_soc_dai_driver *dai_drv,
3562 int num_dai)
3563 {
3564 struct snd_soc_dapm_context *dapm;
3565 struct snd_soc_codec *codec;
3566 struct snd_soc_dai *dai;
3567 int ret, i;
3568
3569 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3570
3571 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3572 if (codec == NULL)
3573 return -ENOMEM;
3574
3575 codec->component.codec = codec;
3576
3577 ret = snd_soc_component_initialize(&codec->component,
3578 &codec_drv->component_driver, dev);
3579 if (ret)
3580 goto err_free;
3581
3582 if (codec_drv->probe)
3583 codec->component.probe = snd_soc_codec_drv_probe;
3584 if (codec_drv->remove)
3585 codec->component.remove = snd_soc_codec_drv_remove;
3586 if (codec_drv->suspend)
3587 codec->component.suspend = snd_soc_codec_drv_suspend;
3588 if (codec_drv->resume)
3589 codec->component.resume = snd_soc_codec_drv_resume;
3590 if (codec_drv->write)
3591 codec->component.write = snd_soc_codec_drv_write;
3592 if (codec_drv->read)
3593 codec->component.read = snd_soc_codec_drv_read;
3594 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3595
3596 dapm = snd_soc_codec_get_dapm(codec);
3597 dapm->idle_bias_off = codec_drv->idle_bias_off;
3598 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3599 if (codec_drv->seq_notifier)
3600 dapm->seq_notifier = codec_drv->seq_notifier;
3601 if (codec_drv->set_bias_level)
3602 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3603 codec->dev = dev;
3604 codec->driver = codec_drv;
3605 codec->component.val_bytes = codec_drv->reg_word_size;
3606
3607 #ifdef CONFIG_DEBUG_FS
3608 codec->component.init_debugfs = soc_init_codec_debugfs;
3609 codec->component.debugfs_prefix = "codec";
3610 #endif
3611
3612 if (codec_drv->get_regmap)
3613 codec->component.regmap = codec_drv->get_regmap(dev);
3614
3615 for (i = 0; i < num_dai; i++) {
3616 fixup_codec_formats(&dai_drv[i].playback);
3617 fixup_codec_formats(&dai_drv[i].capture);
3618 }
3619
3620 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3621 if (ret < 0) {
3622 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3623 goto err_cleanup;
3624 }
3625
3626 list_for_each_entry(dai, &codec->component.dai_list, list)
3627 dai->codec = codec;
3628
3629 mutex_lock(&client_mutex);
3630 snd_soc_component_add_unlocked(&codec->component);
3631 list_add(&codec->list, &codec_list);
3632 mutex_unlock(&client_mutex);
3633
3634 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3635 codec->component.name);
3636 return 0;
3637
3638 err_cleanup:
3639 snd_soc_component_cleanup(&codec->component);
3640 err_free:
3641 kfree(codec);
3642 return ret;
3643 }
3644 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3645
3646 /**
3647 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3648 *
3649 * @dev: codec to unregister
3650 */
3651 void snd_soc_unregister_codec(struct device *dev)
3652 {
3653 struct snd_soc_codec *codec;
3654
3655 mutex_lock(&client_mutex);
3656 list_for_each_entry(codec, &codec_list, list) {
3657 if (dev == codec->dev)
3658 goto found;
3659 }
3660 mutex_unlock(&client_mutex);
3661 return;
3662
3663 found:
3664 list_del(&codec->list);
3665 snd_soc_component_del_unlocked(&codec->component);
3666 mutex_unlock(&client_mutex);
3667
3668 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3669 codec->component.name);
3670
3671 snd_soc_component_cleanup(&codec->component);
3672 snd_soc_cache_exit(codec);
3673 kfree(codec);
3674 }
3675 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3676
3677 /* Retrieve a card's name from device tree */
3678 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3679 const char *propname)
3680 {
3681 struct device_node *np;
3682 int ret;
3683
3684 if (!card->dev) {
3685 pr_err("card->dev is not set before calling %s\n", __func__);
3686 return -EINVAL;
3687 }
3688
3689 np = card->dev->of_node;
3690
3691 ret = of_property_read_string_index(np, propname, 0, &card->name);
3692 /*
3693 * EINVAL means the property does not exist. This is fine providing
3694 * card->name was previously set, which is checked later in
3695 * snd_soc_register_card.
3696 */
3697 if (ret < 0 && ret != -EINVAL) {
3698 dev_err(card->dev,
3699 "ASoC: Property '%s' could not be read: %d\n",
3700 propname, ret);
3701 return ret;
3702 }
3703
3704 return 0;
3705 }
3706 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3707
3708 static const struct snd_soc_dapm_widget simple_widgets[] = {
3709 SND_SOC_DAPM_MIC("Microphone", NULL),
3710 SND_SOC_DAPM_LINE("Line", NULL),
3711 SND_SOC_DAPM_HP("Headphone", NULL),
3712 SND_SOC_DAPM_SPK("Speaker", NULL),
3713 };
3714
3715 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3716 const char *propname)
3717 {
3718 struct device_node *np = card->dev->of_node;
3719 struct snd_soc_dapm_widget *widgets;
3720 const char *template, *wname;
3721 int i, j, num_widgets, ret;
3722
3723 num_widgets = of_property_count_strings(np, propname);
3724 if (num_widgets < 0) {
3725 dev_err(card->dev,
3726 "ASoC: Property '%s' does not exist\n", propname);
3727 return -EINVAL;
3728 }
3729 if (num_widgets & 1) {
3730 dev_err(card->dev,
3731 "ASoC: Property '%s' length is not even\n", propname);
3732 return -EINVAL;
3733 }
3734
3735 num_widgets /= 2;
3736 if (!num_widgets) {
3737 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3738 propname);
3739 return -EINVAL;
3740 }
3741
3742 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3743 GFP_KERNEL);
3744 if (!widgets) {
3745 dev_err(card->dev,
3746 "ASoC: Could not allocate memory for widgets\n");
3747 return -ENOMEM;
3748 }
3749
3750 for (i = 0; i < num_widgets; i++) {
3751 ret = of_property_read_string_index(np, propname,
3752 2 * i, &template);
3753 if (ret) {
3754 dev_err(card->dev,
3755 "ASoC: Property '%s' index %d read error:%d\n",
3756 propname, 2 * i, ret);
3757 return -EINVAL;
3758 }
3759
3760 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3761 if (!strncmp(template, simple_widgets[j].name,
3762 strlen(simple_widgets[j].name))) {
3763 widgets[i] = simple_widgets[j];
3764 break;
3765 }
3766 }
3767
3768 if (j >= ARRAY_SIZE(simple_widgets)) {
3769 dev_err(card->dev,
3770 "ASoC: DAPM widget '%s' is not supported\n",
3771 template);
3772 return -EINVAL;
3773 }
3774
3775 ret = of_property_read_string_index(np, propname,
3776 (2 * i) + 1,
3777 &wname);
3778 if (ret) {
3779 dev_err(card->dev,
3780 "ASoC: Property '%s' index %d read error:%d\n",
3781 propname, (2 * i) + 1, ret);
3782 return -EINVAL;
3783 }
3784
3785 widgets[i].name = wname;
3786 }
3787
3788 card->of_dapm_widgets = widgets;
3789 card->num_of_dapm_widgets = num_widgets;
3790
3791 return 0;
3792 }
3793 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3794
3795 static int snd_soc_of_get_slot_mask(struct device_node *np,
3796 const char *prop_name,
3797 unsigned int *mask)
3798 {
3799 u32 val;
3800 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3801 int i;
3802
3803 if (!of_slot_mask)
3804 return 0;
3805 val /= sizeof(u32);
3806 for (i = 0; i < val; i++)
3807 if (be32_to_cpup(&of_slot_mask[i]))
3808 *mask |= (1 << i);
3809
3810 return val;
3811 }
3812
3813 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3814 unsigned int *tx_mask,
3815 unsigned int *rx_mask,
3816 unsigned int *slots,
3817 unsigned int *slot_width)
3818 {
3819 u32 val;
3820 int ret;
3821
3822 if (tx_mask)
3823 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3824 if (rx_mask)
3825 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3826
3827 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3828 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3829 if (ret)
3830 return ret;
3831
3832 if (slots)
3833 *slots = val;
3834 }
3835
3836 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3837 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3838 if (ret)
3839 return ret;
3840
3841 if (slot_width)
3842 *slot_width = val;
3843 }
3844
3845 return 0;
3846 }
3847 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3848
3849 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
3850 struct snd_soc_codec_conf *codec_conf,
3851 struct device_node *of_node,
3852 const char *propname)
3853 {
3854 struct device_node *np = card->dev->of_node;
3855 const char *str;
3856 int ret;
3857
3858 ret = of_property_read_string(np, propname, &str);
3859 if (ret < 0) {
3860 /* no prefix is not error */
3861 return;
3862 }
3863
3864 codec_conf->of_node = of_node;
3865 codec_conf->name_prefix = str;
3866 }
3867 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
3868
3869 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3870 const char *propname)
3871 {
3872 struct device_node *np = card->dev->of_node;
3873 int num_routes;
3874 struct snd_soc_dapm_route *routes;
3875 int i, ret;
3876
3877 num_routes = of_property_count_strings(np, propname);
3878 if (num_routes < 0 || num_routes & 1) {
3879 dev_err(card->dev,
3880 "ASoC: Property '%s' does not exist or its length is not even\n",
3881 propname);
3882 return -EINVAL;
3883 }
3884 num_routes /= 2;
3885 if (!num_routes) {
3886 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3887 propname);
3888 return -EINVAL;
3889 }
3890
3891 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3892 GFP_KERNEL);
3893 if (!routes) {
3894 dev_err(card->dev,
3895 "ASoC: Could not allocate DAPM route table\n");
3896 return -EINVAL;
3897 }
3898
3899 for (i = 0; i < num_routes; i++) {
3900 ret = of_property_read_string_index(np, propname,
3901 2 * i, &routes[i].sink);
3902 if (ret) {
3903 dev_err(card->dev,
3904 "ASoC: Property '%s' index %d could not be read: %d\n",
3905 propname, 2 * i, ret);
3906 return -EINVAL;
3907 }
3908 ret = of_property_read_string_index(np, propname,
3909 (2 * i) + 1, &routes[i].source);
3910 if (ret) {
3911 dev_err(card->dev,
3912 "ASoC: Property '%s' index %d could not be read: %d\n",
3913 propname, (2 * i) + 1, ret);
3914 return -EINVAL;
3915 }
3916 }
3917
3918 card->num_of_dapm_routes = num_routes;
3919 card->of_dapm_routes = routes;
3920
3921 return 0;
3922 }
3923 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3924
3925 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3926 const char *prefix,
3927 struct device_node **bitclkmaster,
3928 struct device_node **framemaster)
3929 {
3930 int ret, i;
3931 char prop[128];
3932 unsigned int format = 0;
3933 int bit, frame;
3934 const char *str;
3935 struct {
3936 char *name;
3937 unsigned int val;
3938 } of_fmt_table[] = {
3939 { "i2s", SND_SOC_DAIFMT_I2S },
3940 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3941 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3942 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3943 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3944 { "ac97", SND_SOC_DAIFMT_AC97 },
3945 { "pdm", SND_SOC_DAIFMT_PDM},
3946 { "msb", SND_SOC_DAIFMT_MSB },
3947 { "lsb", SND_SOC_DAIFMT_LSB },
3948 };
3949
3950 if (!prefix)
3951 prefix = "";
3952
3953 /*
3954 * check "[prefix]format = xxx"
3955 * SND_SOC_DAIFMT_FORMAT_MASK area
3956 */
3957 snprintf(prop, sizeof(prop), "%sformat", prefix);
3958 ret = of_property_read_string(np, prop, &str);
3959 if (ret == 0) {
3960 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3961 if (strcmp(str, of_fmt_table[i].name) == 0) {
3962 format |= of_fmt_table[i].val;
3963 break;
3964 }
3965 }
3966 }
3967
3968 /*
3969 * check "[prefix]continuous-clock"
3970 * SND_SOC_DAIFMT_CLOCK_MASK area
3971 */
3972 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3973 if (of_property_read_bool(np, prop))
3974 format |= SND_SOC_DAIFMT_CONT;
3975 else
3976 format |= SND_SOC_DAIFMT_GATED;
3977
3978 /*
3979 * check "[prefix]bitclock-inversion"
3980 * check "[prefix]frame-inversion"
3981 * SND_SOC_DAIFMT_INV_MASK area
3982 */
3983 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3984 bit = !!of_get_property(np, prop, NULL);
3985
3986 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3987 frame = !!of_get_property(np, prop, NULL);
3988
3989 switch ((bit << 4) + frame) {
3990 case 0x11:
3991 format |= SND_SOC_DAIFMT_IB_IF;
3992 break;
3993 case 0x10:
3994 format |= SND_SOC_DAIFMT_IB_NF;
3995 break;
3996 case 0x01:
3997 format |= SND_SOC_DAIFMT_NB_IF;
3998 break;
3999 default:
4000 /* SND_SOC_DAIFMT_NB_NF is default */
4001 break;
4002 }
4003
4004 /*
4005 * check "[prefix]bitclock-master"
4006 * check "[prefix]frame-master"
4007 * SND_SOC_DAIFMT_MASTER_MASK area
4008 */
4009 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4010 bit = !!of_get_property(np, prop, NULL);
4011 if (bit && bitclkmaster)
4012 *bitclkmaster = of_parse_phandle(np, prop, 0);
4013
4014 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4015 frame = !!of_get_property(np, prop, NULL);
4016 if (frame && framemaster)
4017 *framemaster = of_parse_phandle(np, prop, 0);
4018
4019 switch ((bit << 4) + frame) {
4020 case 0x11:
4021 format |= SND_SOC_DAIFMT_CBM_CFM;
4022 break;
4023 case 0x10:
4024 format |= SND_SOC_DAIFMT_CBM_CFS;
4025 break;
4026 case 0x01:
4027 format |= SND_SOC_DAIFMT_CBS_CFM;
4028 break;
4029 default:
4030 format |= SND_SOC_DAIFMT_CBS_CFS;
4031 break;
4032 }
4033
4034 return format;
4035 }
4036 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4037
4038 int snd_soc_get_dai_name(struct of_phandle_args *args,
4039 const char **dai_name)
4040 {
4041 struct snd_soc_component *pos;
4042 struct device_node *component_of_node;
4043 int ret = -EPROBE_DEFER;
4044
4045 mutex_lock(&client_mutex);
4046 list_for_each_entry(pos, &component_list, list) {
4047 component_of_node = pos->dev->of_node;
4048 if (!component_of_node && pos->dev->parent)
4049 component_of_node = pos->dev->parent->of_node;
4050
4051 if (component_of_node != args->np)
4052 continue;
4053
4054 if (pos->driver->of_xlate_dai_name) {
4055 ret = pos->driver->of_xlate_dai_name(pos,
4056 args,
4057 dai_name);
4058 } else {
4059 int id = -1;
4060
4061 switch (args->args_count) {
4062 case 0:
4063 id = 0; /* same as dai_drv[0] */
4064 break;
4065 case 1:
4066 id = args->args[0];
4067 break;
4068 default:
4069 /* not supported */
4070 break;
4071 }
4072
4073 if (id < 0 || id >= pos->num_dai) {
4074 ret = -EINVAL;
4075 continue;
4076 }
4077
4078 ret = 0;
4079
4080 *dai_name = pos->dai_drv[id].name;
4081 if (!*dai_name)
4082 *dai_name = pos->name;
4083 }
4084
4085 break;
4086 }
4087 mutex_unlock(&client_mutex);
4088 return ret;
4089 }
4090 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
4091
4092 int snd_soc_of_get_dai_name(struct device_node *of_node,
4093 const char **dai_name)
4094 {
4095 struct of_phandle_args args;
4096 int ret;
4097
4098 ret = of_parse_phandle_with_args(of_node, "sound-dai",
4099 "#sound-dai-cells", 0, &args);
4100 if (ret)
4101 return ret;
4102
4103 ret = snd_soc_get_dai_name(&args, dai_name);
4104
4105 of_node_put(args.np);
4106
4107 return ret;
4108 }
4109 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4110
4111 /*
4112 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
4113 * @dev: Card device
4114 * @of_node: Device node
4115 * @dai_link: DAI link
4116 *
4117 * Builds an array of CODEC DAI components from the DAI link property
4118 * 'sound-dai'.
4119 * The array is set in the DAI link and the number of DAIs is set accordingly.
4120 * The device nodes in the array (of_node) must be dereferenced by the caller.
4121 *
4122 * Returns 0 for success
4123 */
4124 int snd_soc_of_get_dai_link_codecs(struct device *dev,
4125 struct device_node *of_node,
4126 struct snd_soc_dai_link *dai_link)
4127 {
4128 struct of_phandle_args args;
4129 struct snd_soc_dai_link_component *component;
4130 char *name;
4131 int index, num_codecs, ret;
4132
4133 /* Count the number of CODECs */
4134 name = "sound-dai";
4135 num_codecs = of_count_phandle_with_args(of_node, name,
4136 "#sound-dai-cells");
4137 if (num_codecs <= 0) {
4138 if (num_codecs == -ENOENT)
4139 dev_err(dev, "No 'sound-dai' property\n");
4140 else
4141 dev_err(dev, "Bad phandle in 'sound-dai'\n");
4142 return num_codecs;
4143 }
4144 component = devm_kzalloc(dev,
4145 sizeof *component * num_codecs,
4146 GFP_KERNEL);
4147 if (!component)
4148 return -ENOMEM;
4149 dai_link->codecs = component;
4150 dai_link->num_codecs = num_codecs;
4151
4152 /* Parse the list */
4153 for (index = 0, component = dai_link->codecs;
4154 index < dai_link->num_codecs;
4155 index++, component++) {
4156 ret = of_parse_phandle_with_args(of_node, name,
4157 "#sound-dai-cells",
4158 index, &args);
4159 if (ret)
4160 goto err;
4161 component->of_node = args.np;
4162 ret = snd_soc_get_dai_name(&args, &component->dai_name);
4163 if (ret < 0)
4164 goto err;
4165 }
4166 return 0;
4167 err:
4168 for (index = 0, component = dai_link->codecs;
4169 index < dai_link->num_codecs;
4170 index++, component++) {
4171 if (!component->of_node)
4172 break;
4173 of_node_put(component->of_node);
4174 component->of_node = NULL;
4175 }
4176 dai_link->codecs = NULL;
4177 dai_link->num_codecs = 0;
4178 return ret;
4179 }
4180 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4181
4182 static int __init snd_soc_init(void)
4183 {
4184 snd_soc_debugfs_init();
4185 snd_soc_util_init();
4186
4187 return platform_driver_register(&soc_driver);
4188 }
4189 module_init(snd_soc_init);
4190
4191 static void __exit snd_soc_exit(void)
4192 {
4193 snd_soc_util_exit();
4194 snd_soc_debugfs_exit();
4195
4196 platform_driver_unregister(&soc_driver);
4197 }
4198 module_exit(snd_soc_exit);
4199
4200 /* Module information */
4201 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4202 MODULE_DESCRIPTION("ALSA SoC Core");
4203 MODULE_LICENSE("GPL");
4204 MODULE_ALIAS("platform:soc-audio");
Linux with added FPC-III support