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1/*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/bitops.h>
31#include <linux/debugfs.h>
32#include <linux/platform_device.h>
33#include <linux/pinctrl/consumer.h>
34#include <linux/ctype.h>
35#include <linux/slab.h>
36#include <linux/of.h>
37#include <linux/of_graph.h>
38#include <linux/dmi.h>
39#include <sound/core.h>
40#include <sound/jack.h>
41#include <sound/pcm.h>
42#include <sound/pcm_params.h>
43#include <sound/soc.h>
44#include <sound/soc-dpcm.h>
45#include <sound/soc-topology.h>
46#include <sound/initval.h>
47
48#define CREATE_TRACE_POINTS
49#include <trace/events/asoc.h>
50
51#define NAME_SIZE 32
52
53#ifdef CONFIG_DEBUG_FS
54struct dentry *snd_soc_debugfs_root;
55EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
56#endif
57
58static DEFINE_MUTEX(client_mutex);
59static LIST_HEAD(platform_list);
60static LIST_HEAD(codec_list);
61static LIST_HEAD(component_list);
62
63/*
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
67 */
68static int pmdown_time = 5000;
69module_param(pmdown_time, int, 0);
70MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72/* If a DMI filed contain strings in this blacklist (e.g.
73 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
74 * as invalid and dropped when setting the card long name from DMI info.
75 */
76static const char * const dmi_blacklist[] = {
77 "To be filled by OEM",
78 "TBD by OEM",
79 "Default String",
80 "Board Manufacturer",
81 "Board Vendor Name",
82 "Board Product Name",
83 NULL, /* terminator */
84};
85
86/* returns the minimum number of bytes needed to represent
87 * a particular given value */
88static int min_bytes_needed(unsigned long val)
89{
90 int c = 0;
91 int i;
92
93 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
94 if (val & (1UL << i))
95 break;
96 c = (sizeof val * 8) - c;
97 if (!c || (c % 8))
98 c = (c + 8) / 8;
99 else
100 c /= 8;
101 return c;
102}
103
104/* fill buf which is 'len' bytes with a formatted
105 * string of the form 'reg: value\n' */
106static int format_register_str(struct snd_soc_codec *codec,
107 unsigned int reg, char *buf, size_t len)
108{
109 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
110 int regsize = codec->driver->reg_word_size * 2;
111 int ret;
112
113 /* +2 for ': ' and + 1 for '\n' */
114 if (wordsize + regsize + 2 + 1 != len)
115 return -EINVAL;
116
117 sprintf(buf, "%.*x: ", wordsize, reg);
118 buf += wordsize + 2;
119
120 ret = snd_soc_read(codec, reg);
121 if (ret < 0)
122 memset(buf, 'X', regsize);
123 else
124 sprintf(buf, "%.*x", regsize, ret);
125 buf[regsize] = '\n';
126 /* no NUL-termination needed */
127 return 0;
128}
129
130/* codec register dump */
131static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
132 size_t count, loff_t pos)
133{
134 int i, step = 1;
135 int wordsize, regsize;
136 int len;
137 size_t total = 0;
138 loff_t p = 0;
139
140 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
141 regsize = codec->driver->reg_word_size * 2;
142
143 len = wordsize + regsize + 2 + 1;
144
145 if (!codec->driver->reg_cache_size)
146 return 0;
147
148 if (codec->driver->reg_cache_step)
149 step = codec->driver->reg_cache_step;
150
151 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
152 /* only support larger than PAGE_SIZE bytes debugfs
153 * entries for the default case */
154 if (p >= pos) {
155 if (total + len >= count - 1)
156 break;
157 format_register_str(codec, i, buf + total, len);
158 total += len;
159 }
160 p += len;
161 }
162
163 total = min(total, count - 1);
164
165 return total;
166}
167
168static ssize_t codec_reg_show(struct device *dev,
169 struct device_attribute *attr, char *buf)
170{
171 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
172
173 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
174}
175
176static DEVICE_ATTR_RO(codec_reg);
177
178static ssize_t pmdown_time_show(struct device *dev,
179 struct device_attribute *attr, char *buf)
180{
181 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
182
183 return sprintf(buf, "%ld\n", rtd->pmdown_time);
184}
185
186static ssize_t pmdown_time_set(struct device *dev,
187 struct device_attribute *attr,
188 const char *buf, size_t count)
189{
190 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
191 int ret;
192
193 ret = kstrtol(buf, 10, &rtd->pmdown_time);
194 if (ret)
195 return ret;
196
197 return count;
198}
199
200static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
201
202static struct attribute *soc_dev_attrs[] = {
203 &dev_attr_codec_reg.attr,
204 &dev_attr_pmdown_time.attr,
205 NULL
206};
207
208static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
209 struct attribute *attr, int idx)
210{
211 struct device *dev = kobj_to_dev(kobj);
212 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
213
214 if (attr == &dev_attr_pmdown_time.attr)
215 return attr->mode; /* always visible */
216 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
217}
218
219static const struct attribute_group soc_dapm_dev_group = {
220 .attrs = soc_dapm_dev_attrs,
221 .is_visible = soc_dev_attr_is_visible,
222};
223
224static const struct attribute_group soc_dev_group = {
225 .attrs = soc_dev_attrs,
226 .is_visible = soc_dev_attr_is_visible,
227};
228
229static const struct attribute_group *soc_dev_attr_groups[] = {
230 &soc_dapm_dev_group,
231 &soc_dev_group,
232 NULL
233};
234
235#ifdef CONFIG_DEBUG_FS
236static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
237 size_t count, loff_t *ppos)
238{
239 ssize_t ret;
240 struct snd_soc_codec *codec = file->private_data;
241 char *buf;
242
243 if (*ppos < 0 || !count)
244 return -EINVAL;
245
246 buf = kmalloc(count, GFP_KERNEL);
247 if (!buf)
248 return -ENOMEM;
249
250 ret = soc_codec_reg_show(codec, buf, count, *ppos);
251 if (ret >= 0) {
252 if (copy_to_user(user_buf, buf, ret)) {
253 kfree(buf);
254 return -EFAULT;
255 }
256 *ppos += ret;
257 }
258
259 kfree(buf);
260 return ret;
261}
262
263static ssize_t codec_reg_write_file(struct file *file,
264 const char __user *user_buf, size_t count, loff_t *ppos)
265{
266 char buf[32];
267 size_t buf_size;
268 char *start = buf;
269 unsigned long reg, value;
270 struct snd_soc_codec *codec = file->private_data;
271 int ret;
272
273 buf_size = min(count, (sizeof(buf)-1));
274 if (copy_from_user(buf, user_buf, buf_size))
275 return -EFAULT;
276 buf[buf_size] = 0;
277
278 while (*start == ' ')
279 start++;
280 reg = simple_strtoul(start, &start, 16);
281 while (*start == ' ')
282 start++;
283 ret = kstrtoul(start, 16, &value);
284 if (ret)
285 return ret;
286
287 /* Userspace has been fiddling around behind the kernel's back */
288 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
289
290 snd_soc_write(codec, reg, value);
291 return buf_size;
292}
293
294static const struct file_operations codec_reg_fops = {
295 .open = simple_open,
296 .read = codec_reg_read_file,
297 .write = codec_reg_write_file,
298 .llseek = default_llseek,
299};
300
301static void soc_init_component_debugfs(struct snd_soc_component *component)
302{
303 if (!component->card->debugfs_card_root)
304 return;
305
306 if (component->debugfs_prefix) {
307 char *name;
308
309 name = kasprintf(GFP_KERNEL, "%s:%s",
310 component->debugfs_prefix, component->name);
311 if (name) {
312 component->debugfs_root = debugfs_create_dir(name,
313 component->card->debugfs_card_root);
314 kfree(name);
315 }
316 } else {
317 component->debugfs_root = debugfs_create_dir(component->name,
318 component->card->debugfs_card_root);
319 }
320
321 if (!component->debugfs_root) {
322 dev_warn(component->dev,
323 "ASoC: Failed to create component debugfs directory\n");
324 return;
325 }
326
327 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
328 component->debugfs_root);
329
330 if (component->init_debugfs)
331 component->init_debugfs(component);
332}
333
334static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
335{
336 debugfs_remove_recursive(component->debugfs_root);
337}
338
339static void soc_init_codec_debugfs(struct snd_soc_component *component)
340{
341 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
342 struct dentry *debugfs_reg;
343
344 debugfs_reg = debugfs_create_file("codec_reg", 0644,
345 codec->component.debugfs_root,
346 codec, &codec_reg_fops);
347 if (!debugfs_reg)
348 dev_warn(codec->dev,
349 "ASoC: Failed to create codec register debugfs file\n");
350}
351
352static int codec_list_show(struct seq_file *m, void *v)
353{
354 struct snd_soc_codec *codec;
355
356 mutex_lock(&client_mutex);
357
358 list_for_each_entry(codec, &codec_list, list)
359 seq_printf(m, "%s\n", codec->component.name);
360
361 mutex_unlock(&client_mutex);
362
363 return 0;
364}
365DEFINE_SHOW_ATTRIBUTE(codec_list);
366
367static int dai_list_show(struct seq_file *m, void *v)
368{
369 struct snd_soc_component *component;
370 struct snd_soc_dai *dai;
371
372 mutex_lock(&client_mutex);
373
374 list_for_each_entry(component, &component_list, list)
375 list_for_each_entry(dai, &component->dai_list, list)
376 seq_printf(m, "%s\n", dai->name);
377
378 mutex_unlock(&client_mutex);
379
380 return 0;
381}
382DEFINE_SHOW_ATTRIBUTE(dai_list);
383
384static int platform_list_show(struct seq_file *m, void *v)
385{
386 struct snd_soc_platform *platform;
387
388 mutex_lock(&client_mutex);
389
390 list_for_each_entry(platform, &platform_list, list)
391 seq_printf(m, "%s\n", platform->component.name);
392
393 mutex_unlock(&client_mutex);
394
395 return 0;
396}
397DEFINE_SHOW_ATTRIBUTE(platform_list);
398
399static void soc_init_card_debugfs(struct snd_soc_card *card)
400{
401 if (!snd_soc_debugfs_root)
402 return;
403
404 card->debugfs_card_root = debugfs_create_dir(card->name,
405 snd_soc_debugfs_root);
406 if (!card->debugfs_card_root) {
407 dev_warn(card->dev,
408 "ASoC: Failed to create card debugfs directory\n");
409 return;
410 }
411
412 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
413 card->debugfs_card_root,
414 &card->pop_time);
415 if (!card->debugfs_pop_time)
416 dev_warn(card->dev,
417 "ASoC: Failed to create pop time debugfs file\n");
418}
419
420static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
421{
422 debugfs_remove_recursive(card->debugfs_card_root);
423}
424
425static void snd_soc_debugfs_init(void)
426{
427 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
428 if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
429 pr_warn("ASoC: Failed to create debugfs directory\n");
430 snd_soc_debugfs_root = NULL;
431 return;
432 }
433
434 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
435 &codec_list_fops))
436 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
437
438 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
439 &dai_list_fops))
440 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
441
442 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
443 &platform_list_fops))
444 pr_warn("ASoC: Failed to create platform list debugfs file\n");
445}
446
447static void snd_soc_debugfs_exit(void)
448{
449 debugfs_remove_recursive(snd_soc_debugfs_root);
450}
451
452#else
453
454#define soc_init_codec_debugfs NULL
455
456static inline void soc_init_component_debugfs(
457 struct snd_soc_component *component)
458{
459}
460
461static inline void soc_cleanup_component_debugfs(
462 struct snd_soc_component *component)
463{
464}
465
466static inline void soc_init_card_debugfs(struct snd_soc_card *card)
467{
468}
469
470static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
471{
472}
473
474static inline void snd_soc_debugfs_init(void)
475{
476}
477
478static inline void snd_soc_debugfs_exit(void)
479{
480}
481
482#endif
483
484static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
485 struct snd_soc_component *component)
486{
487 struct snd_soc_rtdcom_list *rtdcom;
488 struct snd_soc_rtdcom_list *new_rtdcom;
489
490 for_each_rtdcom(rtd, rtdcom) {
491 /* already connected */
492 if (rtdcom->component == component)
493 return 0;
494 }
495
496 new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
497 if (!new_rtdcom)
498 return -ENOMEM;
499
500 new_rtdcom->component = component;
501 INIT_LIST_HEAD(&new_rtdcom->list);
502
503 list_add_tail(&new_rtdcom->list, &rtd->component_list);
504
505 return 0;
506}
507
508static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
509{
510 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
511
512 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
513 kfree(rtdcom1);
514
515 INIT_LIST_HEAD(&rtd->component_list);
516}
517
518struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
519 const char *driver_name)
520{
521 struct snd_soc_rtdcom_list *rtdcom;
522
523 if (!driver_name)
524 return NULL;
525
526 for_each_rtdcom(rtd, rtdcom) {
527 const char *component_name = rtdcom->component->driver->name;
528
529 if (!component_name)
530 continue;
531
532 if ((component_name == driver_name) ||
533 strcmp(component_name, driver_name) == 0)
534 return rtdcom->component;
535 }
536
537 return NULL;
538}
539EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
540
541struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
542 const char *dai_link, int stream)
543{
544 struct snd_soc_pcm_runtime *rtd;
545
546 list_for_each_entry(rtd, &card->rtd_list, list) {
547 if (rtd->dai_link->no_pcm &&
548 !strcmp(rtd->dai_link->name, dai_link))
549 return rtd->pcm->streams[stream].substream;
550 }
551 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
552 return NULL;
553}
554EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
555
556static const struct snd_soc_ops null_snd_soc_ops;
557
558static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
559 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
560{
561 struct snd_soc_pcm_runtime *rtd;
562
563 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
564 if (!rtd)
565 return NULL;
566
567 INIT_LIST_HEAD(&rtd->component_list);
568 rtd->card = card;
569 rtd->dai_link = dai_link;
570 if (!rtd->dai_link->ops)
571 rtd->dai_link->ops = &null_snd_soc_ops;
572
573 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
574 dai_link->num_codecs,
575 GFP_KERNEL);
576 if (!rtd->codec_dais) {
577 kfree(rtd);
578 return NULL;
579 }
580
581 return rtd;
582}
583
584static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
585{
586 kfree(rtd->codec_dais);
587 snd_soc_rtdcom_del_all(rtd);
588 kfree(rtd);
589}
590
591static void soc_add_pcm_runtime(struct snd_soc_card *card,
592 struct snd_soc_pcm_runtime *rtd)
593{
594 list_add_tail(&rtd->list, &card->rtd_list);
595 rtd->num = card->num_rtd;
596 card->num_rtd++;
597}
598
599static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
600{
601 struct snd_soc_pcm_runtime *rtd, *_rtd;
602
603 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
604 list_del(&rtd->list);
605 soc_free_pcm_runtime(rtd);
606 }
607
608 card->num_rtd = 0;
609}
610
611struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
612 const char *dai_link)
613{
614 struct snd_soc_pcm_runtime *rtd;
615
616 list_for_each_entry(rtd, &card->rtd_list, list) {
617 if (!strcmp(rtd->dai_link->name, dai_link))
618 return rtd;
619 }
620 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
621 return NULL;
622}
623EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
624
625static void codec2codec_close_delayed_work(struct work_struct *work)
626{
627 /* Currently nothing to do for c2c links
628 * Since c2c links are internal nodes in the DAPM graph and
629 * don't interface with the outside world or application layer
630 * we don't have to do any special handling on close.
631 */
632}
633
634#ifdef CONFIG_PM_SLEEP
635/* powers down audio subsystem for suspend */
636int snd_soc_suspend(struct device *dev)
637{
638 struct snd_soc_card *card = dev_get_drvdata(dev);
639 struct snd_soc_component *component;
640 struct snd_soc_pcm_runtime *rtd;
641 int i;
642
643 /* If the card is not initialized yet there is nothing to do */
644 if (!card->instantiated)
645 return 0;
646
647 /* Due to the resume being scheduled into a workqueue we could
648 * suspend before that's finished - wait for it to complete.
649 */
650 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
651
652 /* we're going to block userspace touching us until resume completes */
653 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
654
655 /* mute any active DACs */
656 list_for_each_entry(rtd, &card->rtd_list, list) {
657
658 if (rtd->dai_link->ignore_suspend)
659 continue;
660
661 for (i = 0; i < rtd->num_codecs; i++) {
662 struct snd_soc_dai *dai = rtd->codec_dais[i];
663 struct snd_soc_dai_driver *drv = dai->driver;
664
665 if (drv->ops->digital_mute && dai->playback_active)
666 drv->ops->digital_mute(dai, 1);
667 }
668 }
669
670 /* suspend all pcms */
671 list_for_each_entry(rtd, &card->rtd_list, list) {
672 if (rtd->dai_link->ignore_suspend)
673 continue;
674
675 snd_pcm_suspend_all(rtd->pcm);
676 }
677
678 if (card->suspend_pre)
679 card->suspend_pre(card);
680
681 list_for_each_entry(rtd, &card->rtd_list, list) {
682 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
683
684 if (rtd->dai_link->ignore_suspend)
685 continue;
686
687 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
688 cpu_dai->driver->suspend(cpu_dai);
689 }
690
691 /* close any waiting streams */
692 list_for_each_entry(rtd, &card->rtd_list, list)
693 flush_delayed_work(&rtd->delayed_work);
694
695 list_for_each_entry(rtd, &card->rtd_list, list) {
696
697 if (rtd->dai_link->ignore_suspend)
698 continue;
699
700 snd_soc_dapm_stream_event(rtd,
701 SNDRV_PCM_STREAM_PLAYBACK,
702 SND_SOC_DAPM_STREAM_SUSPEND);
703
704 snd_soc_dapm_stream_event(rtd,
705 SNDRV_PCM_STREAM_CAPTURE,
706 SND_SOC_DAPM_STREAM_SUSPEND);
707 }
708
709 /* Recheck all endpoints too, their state is affected by suspend */
710 dapm_mark_endpoints_dirty(card);
711 snd_soc_dapm_sync(&card->dapm);
712
713 /* suspend all COMPONENTs */
714 list_for_each_entry(component, &card->component_dev_list, card_list) {
715 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
716
717 /* If there are paths active then the COMPONENT will be held with
718 * bias _ON and should not be suspended. */
719 if (!component->suspended) {
720 switch (snd_soc_dapm_get_bias_level(dapm)) {
721 case SND_SOC_BIAS_STANDBY:
722 /*
723 * If the COMPONENT is capable of idle
724 * bias off then being in STANDBY
725 * means it's doing something,
726 * otherwise fall through.
727 */
728 if (dapm->idle_bias_off) {
729 dev_dbg(component->dev,
730 "ASoC: idle_bias_off CODEC on over suspend\n");
731 break;
732 }
733
734 case SND_SOC_BIAS_OFF:
735 if (component->suspend)
736 component->suspend(component);
737 component->suspended = 1;
738 if (component->regmap)
739 regcache_mark_dirty(component->regmap);
740 /* deactivate pins to sleep state */
741 pinctrl_pm_select_sleep_state(component->dev);
742 break;
743 default:
744 dev_dbg(component->dev,
745 "ASoC: COMPONENT is on over suspend\n");
746 break;
747 }
748 }
749 }
750
751 list_for_each_entry(rtd, &card->rtd_list, list) {
752 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
753
754 if (rtd->dai_link->ignore_suspend)
755 continue;
756
757 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
758 cpu_dai->driver->suspend(cpu_dai);
759
760 /* deactivate pins to sleep state */
761 pinctrl_pm_select_sleep_state(cpu_dai->dev);
762 }
763
764 if (card->suspend_post)
765 card->suspend_post(card);
766
767 return 0;
768}
769EXPORT_SYMBOL_GPL(snd_soc_suspend);
770
771/* deferred resume work, so resume can complete before we finished
772 * setting our codec back up, which can be very slow on I2C
773 */
774static void soc_resume_deferred(struct work_struct *work)
775{
776 struct snd_soc_card *card =
777 container_of(work, struct snd_soc_card, deferred_resume_work);
778 struct snd_soc_pcm_runtime *rtd;
779 struct snd_soc_component *component;
780 int i;
781
782 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
783 * so userspace apps are blocked from touching us
784 */
785
786 dev_dbg(card->dev, "ASoC: starting resume work\n");
787
788 /* Bring us up into D2 so that DAPM starts enabling things */
789 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
790
791 if (card->resume_pre)
792 card->resume_pre(card);
793
794 /* resume control bus DAIs */
795 list_for_each_entry(rtd, &card->rtd_list, list) {
796 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
797
798 if (rtd->dai_link->ignore_suspend)
799 continue;
800
801 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
802 cpu_dai->driver->resume(cpu_dai);
803 }
804
805 list_for_each_entry(component, &card->component_dev_list, card_list) {
806 if (component->suspended) {
807 if (component->resume)
808 component->resume(component);
809 component->suspended = 0;
810 }
811 }
812
813 list_for_each_entry(rtd, &card->rtd_list, list) {
814
815 if (rtd->dai_link->ignore_suspend)
816 continue;
817
818 snd_soc_dapm_stream_event(rtd,
819 SNDRV_PCM_STREAM_PLAYBACK,
820 SND_SOC_DAPM_STREAM_RESUME);
821
822 snd_soc_dapm_stream_event(rtd,
823 SNDRV_PCM_STREAM_CAPTURE,
824 SND_SOC_DAPM_STREAM_RESUME);
825 }
826
827 /* unmute any active DACs */
828 list_for_each_entry(rtd, &card->rtd_list, list) {
829
830 if (rtd->dai_link->ignore_suspend)
831 continue;
832
833 for (i = 0; i < rtd->num_codecs; i++) {
834 struct snd_soc_dai *dai = rtd->codec_dais[i];
835 struct snd_soc_dai_driver *drv = dai->driver;
836
837 if (drv->ops->digital_mute && dai->playback_active)
838 drv->ops->digital_mute(dai, 0);
839 }
840 }
841
842 list_for_each_entry(rtd, &card->rtd_list, list) {
843 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
844
845 if (rtd->dai_link->ignore_suspend)
846 continue;
847
848 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
849 cpu_dai->driver->resume(cpu_dai);
850 }
851
852 if (card->resume_post)
853 card->resume_post(card);
854
855 dev_dbg(card->dev, "ASoC: resume work completed\n");
856
857 /* Recheck all endpoints too, their state is affected by suspend */
858 dapm_mark_endpoints_dirty(card);
859 snd_soc_dapm_sync(&card->dapm);
860
861 /* userspace can access us now we are back as we were before */
862 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
863}
864
865/* powers up audio subsystem after a suspend */
866int snd_soc_resume(struct device *dev)
867{
868 struct snd_soc_card *card = dev_get_drvdata(dev);
869 bool bus_control = false;
870 struct snd_soc_pcm_runtime *rtd;
871
872 /* If the card is not initialized yet there is nothing to do */
873 if (!card->instantiated)
874 return 0;
875
876 /* activate pins from sleep state */
877 list_for_each_entry(rtd, &card->rtd_list, list) {
878 struct snd_soc_dai **codec_dais = rtd->codec_dais;
879 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
880 int j;
881
882 if (cpu_dai->active)
883 pinctrl_pm_select_default_state(cpu_dai->dev);
884
885 for (j = 0; j < rtd->num_codecs; j++) {
886 struct snd_soc_dai *codec_dai = codec_dais[j];
887 if (codec_dai->active)
888 pinctrl_pm_select_default_state(codec_dai->dev);
889 }
890 }
891
892 /*
893 * DAIs that also act as the control bus master might have other drivers
894 * hanging off them so need to resume immediately. Other drivers don't
895 * have that problem and may take a substantial amount of time to resume
896 * due to I/O costs and anti-pop so handle them out of line.
897 */
898 list_for_each_entry(rtd, &card->rtd_list, list) {
899 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
900 bus_control |= cpu_dai->driver->bus_control;
901 }
902 if (bus_control) {
903 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
904 soc_resume_deferred(&card->deferred_resume_work);
905 } else {
906 dev_dbg(dev, "ASoC: Scheduling resume work\n");
907 if (!schedule_work(&card->deferred_resume_work))
908 dev_err(dev, "ASoC: resume work item may be lost\n");
909 }
910
911 return 0;
912}
913EXPORT_SYMBOL_GPL(snd_soc_resume);
914#else
915#define snd_soc_suspend NULL
916#define snd_soc_resume NULL
917#endif
918
919static const struct snd_soc_dai_ops null_dai_ops = {
920};
921
922static struct snd_soc_component *soc_find_component(
923 const struct device_node *of_node, const char *name)
924{
925 struct snd_soc_component *component;
926
927 lockdep_assert_held(&client_mutex);
928
929 list_for_each_entry(component, &component_list, list) {
930 if (of_node) {
931 if (component->dev->of_node == of_node)
932 return component;
933 } else if (strcmp(component->name, name) == 0) {
934 return component;
935 }
936 }
937
938 return NULL;
939}
940
941/**
942 * snd_soc_find_dai - Find a registered DAI
943 *
944 * @dlc: name of the DAI or the DAI driver and optional component info to match
945 *
946 * This function will search all registered components and their DAIs to
947 * find the DAI of the same name. The component's of_node and name
948 * should also match if being specified.
949 *
950 * Return: pointer of DAI, or NULL if not found.
951 */
952struct snd_soc_dai *snd_soc_find_dai(
953 const struct snd_soc_dai_link_component *dlc)
954{
955 struct snd_soc_component *component;
956 struct snd_soc_dai *dai;
957 struct device_node *component_of_node;
958
959 lockdep_assert_held(&client_mutex);
960
961 /* Find CPU DAI from registered DAIs*/
962 list_for_each_entry(component, &component_list, list) {
963 component_of_node = component->dev->of_node;
964 if (!component_of_node && component->dev->parent)
965 component_of_node = component->dev->parent->of_node;
966
967 if (dlc->of_node && component_of_node != dlc->of_node)
968 continue;
969 if (dlc->name && strcmp(component->name, dlc->name))
970 continue;
971 list_for_each_entry(dai, &component->dai_list, list) {
972 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
973 && (!dai->driver->name
974 || strcmp(dai->driver->name, dlc->dai_name)))
975 continue;
976
977 return dai;
978 }
979 }
980
981 return NULL;
982}
983EXPORT_SYMBOL_GPL(snd_soc_find_dai);
984
985
986/**
987 * snd_soc_find_dai_link - Find a DAI link
988 *
989 * @card: soc card
990 * @id: DAI link ID to match
991 * @name: DAI link name to match, optional
992 * @stream_name: DAI link stream name to match, optional
993 *
994 * This function will search all existing DAI links of the soc card to
995 * find the link of the same ID. Since DAI links may not have their
996 * unique ID, so name and stream name should also match if being
997 * specified.
998 *
999 * Return: pointer of DAI link, or NULL if not found.
1000 */
1001struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
1002 int id, const char *name,
1003 const char *stream_name)
1004{
1005 struct snd_soc_dai_link *link, *_link;
1006
1007 lockdep_assert_held(&client_mutex);
1008
1009 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1010 if (link->id != id)
1011 continue;
1012
1013 if (name && (!link->name || strcmp(name, link->name)))
1014 continue;
1015
1016 if (stream_name && (!link->stream_name
1017 || strcmp(stream_name, link->stream_name)))
1018 continue;
1019
1020 return link;
1021 }
1022
1023 return NULL;
1024}
1025EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1026
1027static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1028 struct snd_soc_dai_link *dai_link)
1029{
1030 struct snd_soc_pcm_runtime *rtd;
1031
1032 list_for_each_entry(rtd, &card->rtd_list, list) {
1033 if (rtd->dai_link == dai_link)
1034 return true;
1035 }
1036
1037 return false;
1038}
1039
1040static int soc_bind_dai_link(struct snd_soc_card *card,
1041 struct snd_soc_dai_link *dai_link)
1042{
1043 struct snd_soc_pcm_runtime *rtd;
1044 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1045 struct snd_soc_dai_link_component cpu_dai_component;
1046 struct snd_soc_component *component;
1047 struct snd_soc_dai **codec_dais;
1048 struct snd_soc_platform *platform;
1049 struct device_node *platform_of_node;
1050 const char *platform_name;
1051 int i;
1052
1053 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1054
1055 if (soc_is_dai_link_bound(card, dai_link)) {
1056 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1057 dai_link->name);
1058 return 0;
1059 }
1060
1061 rtd = soc_new_pcm_runtime(card, dai_link);
1062 if (!rtd)
1063 return -ENOMEM;
1064
1065 cpu_dai_component.name = dai_link->cpu_name;
1066 cpu_dai_component.of_node = dai_link->cpu_of_node;
1067 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1068 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1069 if (!rtd->cpu_dai) {
1070 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1071 dai_link->cpu_dai_name);
1072 goto _err_defer;
1073 }
1074 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1075
1076 rtd->num_codecs = dai_link->num_codecs;
1077
1078 /* Find CODEC from registered CODECs */
1079 codec_dais = rtd->codec_dais;
1080 for (i = 0; i < rtd->num_codecs; i++) {
1081 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1082 if (!codec_dais[i]) {
1083 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1084 codecs[i].dai_name);
1085 goto _err_defer;
1086 }
1087 snd_soc_rtdcom_add(rtd, codec_dais[i]->component);
1088 }
1089
1090 /* Single codec links expect codec and codec_dai in runtime data */
1091 rtd->codec_dai = codec_dais[0];
1092 rtd->codec = rtd->codec_dai->codec;
1093
1094 /* if there's no platform we match on the empty platform */
1095 platform_name = dai_link->platform_name;
1096 if (!platform_name && !dai_link->platform_of_node)
1097 platform_name = "snd-soc-dummy";
1098
1099 /* find one from the set of registered platforms */
1100 list_for_each_entry(component, &component_list, list) {
1101 platform_of_node = component->dev->of_node;
1102 if (!platform_of_node && component->dev->parent->of_node)
1103 platform_of_node = component->dev->parent->of_node;
1104
1105 if (dai_link->platform_of_node) {
1106 if (platform_of_node != dai_link->platform_of_node)
1107 continue;
1108 } else {
1109 if (strcmp(component->name, platform_name))
1110 continue;
1111 }
1112
1113 snd_soc_rtdcom_add(rtd, component);
1114 }
1115
1116 /* find one from the set of registered platforms */
1117 list_for_each_entry(platform, &platform_list, list) {
1118 platform_of_node = platform->dev->of_node;
1119 if (!platform_of_node && platform->dev->parent->of_node)
1120 platform_of_node = platform->dev->parent->of_node;
1121
1122 if (dai_link->platform_of_node) {
1123 if (platform_of_node != dai_link->platform_of_node)
1124 continue;
1125 } else {
1126 if (strcmp(platform->component.name, platform_name))
1127 continue;
1128 }
1129
1130 rtd->platform = platform;
1131 }
1132
1133 soc_add_pcm_runtime(card, rtd);
1134 return 0;
1135
1136_err_defer:
1137 soc_free_pcm_runtime(rtd);
1138 return -EPROBE_DEFER;
1139}
1140
1141static void soc_remove_component(struct snd_soc_component *component)
1142{
1143 if (!component->card)
1144 return;
1145
1146 list_del(&component->card_list);
1147
1148 if (component->remove)
1149 component->remove(component);
1150
1151 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1152
1153 soc_cleanup_component_debugfs(component);
1154 component->card = NULL;
1155 module_put(component->dev->driver->owner);
1156}
1157
1158static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1159{
1160 int err;
1161
1162 if (dai && dai->probed &&
1163 dai->driver->remove_order == order) {
1164 if (dai->driver->remove) {
1165 err = dai->driver->remove(dai);
1166 if (err < 0)
1167 dev_err(dai->dev,
1168 "ASoC: failed to remove %s: %d\n",
1169 dai->name, err);
1170 }
1171 dai->probed = 0;
1172 }
1173}
1174
1175static void soc_remove_link_dais(struct snd_soc_card *card,
1176 struct snd_soc_pcm_runtime *rtd, int order)
1177{
1178 int i;
1179
1180 /* unregister the rtd device */
1181 if (rtd->dev_registered) {
1182 device_unregister(rtd->dev);
1183 rtd->dev_registered = 0;
1184 }
1185
1186 /* remove the CODEC DAI */
1187 for (i = 0; i < rtd->num_codecs; i++)
1188 soc_remove_dai(rtd->codec_dais[i], order);
1189
1190 soc_remove_dai(rtd->cpu_dai, order);
1191}
1192
1193static void soc_remove_link_components(struct snd_soc_card *card,
1194 struct snd_soc_pcm_runtime *rtd, int order)
1195{
1196 struct snd_soc_component *component;
1197 struct snd_soc_rtdcom_list *rtdcom;
1198
1199 for_each_rtdcom(rtd, rtdcom) {
1200 component = rtdcom->component;
1201
1202 if (component->driver->remove_order == order)
1203 soc_remove_component(component);
1204 }
1205}
1206
1207static void soc_remove_dai_links(struct snd_soc_card *card)
1208{
1209 int order;
1210 struct snd_soc_pcm_runtime *rtd;
1211 struct snd_soc_dai_link *link, *_link;
1212
1213 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1214 order++) {
1215 list_for_each_entry(rtd, &card->rtd_list, list)
1216 soc_remove_link_dais(card, rtd, order);
1217 }
1218
1219 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1220 order++) {
1221 list_for_each_entry(rtd, &card->rtd_list, list)
1222 soc_remove_link_components(card, rtd, order);
1223 }
1224
1225 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1226 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1227 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1228 link->name);
1229
1230 list_del(&link->list);
1231 card->num_dai_links--;
1232 }
1233}
1234
1235static int snd_soc_init_multicodec(struct snd_soc_card *card,
1236 struct snd_soc_dai_link *dai_link)
1237{
1238 /* Legacy codec/codec_dai link is a single entry in multicodec */
1239 if (dai_link->codec_name || dai_link->codec_of_node ||
1240 dai_link->codec_dai_name) {
1241 dai_link->num_codecs = 1;
1242
1243 dai_link->codecs = devm_kzalloc(card->dev,
1244 sizeof(struct snd_soc_dai_link_component),
1245 GFP_KERNEL);
1246 if (!dai_link->codecs)
1247 return -ENOMEM;
1248
1249 dai_link->codecs[0].name = dai_link->codec_name;
1250 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1251 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1252 }
1253
1254 if (!dai_link->codecs) {
1255 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1256 return -EINVAL;
1257 }
1258
1259 return 0;
1260}
1261
1262static int soc_init_dai_link(struct snd_soc_card *card,
1263 struct snd_soc_dai_link *link)
1264{
1265 int i, ret;
1266
1267 ret = snd_soc_init_multicodec(card, link);
1268 if (ret) {
1269 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1270 return ret;
1271 }
1272
1273 for (i = 0; i < link->num_codecs; i++) {
1274 /*
1275 * Codec must be specified by 1 of name or OF node,
1276 * not both or neither.
1277 */
1278 if (!!link->codecs[i].name ==
1279 !!link->codecs[i].of_node) {
1280 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1281 link->name);
1282 return -EINVAL;
1283 }
1284 /* Codec DAI name must be specified */
1285 if (!link->codecs[i].dai_name) {
1286 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1287 link->name);
1288 return -EINVAL;
1289 }
1290 }
1291
1292 /*
1293 * Platform may be specified by either name or OF node, but
1294 * can be left unspecified, and a dummy platform will be used.
1295 */
1296 if (link->platform_name && link->platform_of_node) {
1297 dev_err(card->dev,
1298 "ASoC: Both platform name/of_node are set for %s\n",
1299 link->name);
1300 return -EINVAL;
1301 }
1302
1303 /*
1304 * CPU device may be specified by either name or OF node, but
1305 * can be left unspecified, and will be matched based on DAI
1306 * name alone..
1307 */
1308 if (link->cpu_name && link->cpu_of_node) {
1309 dev_err(card->dev,
1310 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1311 link->name);
1312 return -EINVAL;
1313 }
1314 /*
1315 * At least one of CPU DAI name or CPU device name/node must be
1316 * specified
1317 */
1318 if (!link->cpu_dai_name &&
1319 !(link->cpu_name || link->cpu_of_node)) {
1320 dev_err(card->dev,
1321 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1322 link->name);
1323 return -EINVAL;
1324 }
1325
1326 return 0;
1327}
1328
1329void snd_soc_disconnect_sync(struct device *dev)
1330{
1331 struct snd_soc_component *component = snd_soc_lookup_component(dev, NULL);
1332
1333 if (!component || !component->card)
1334 return;
1335
1336 snd_card_disconnect_sync(component->card->snd_card);
1337}
1338EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1339
1340/**
1341 * snd_soc_add_dai_link - Add a DAI link dynamically
1342 * @card: The ASoC card to which the DAI link is added
1343 * @dai_link: The new DAI link to add
1344 *
1345 * This function adds a DAI link to the ASoC card's link list.
1346 *
1347 * Note: Topology can use this API to add DAI links when probing the
1348 * topology component. And machine drivers can still define static
1349 * DAI links in dai_link array.
1350 */
1351int snd_soc_add_dai_link(struct snd_soc_card *card,
1352 struct snd_soc_dai_link *dai_link)
1353{
1354 if (dai_link->dobj.type
1355 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1356 dev_err(card->dev, "Invalid dai link type %d\n",
1357 dai_link->dobj.type);
1358 return -EINVAL;
1359 }
1360
1361 lockdep_assert_held(&client_mutex);
1362 /* Notify the machine driver for extra initialization
1363 * on the link created by topology.
1364 */
1365 if (dai_link->dobj.type && card->add_dai_link)
1366 card->add_dai_link(card, dai_link);
1367
1368 list_add_tail(&dai_link->list, &card->dai_link_list);
1369 card->num_dai_links++;
1370
1371 return 0;
1372}
1373EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1374
1375/**
1376 * snd_soc_remove_dai_link - Remove a DAI link from the list
1377 * @card: The ASoC card that owns the link
1378 * @dai_link: The DAI link to remove
1379 *
1380 * This function removes a DAI link from the ASoC card's link list.
1381 *
1382 * For DAI links previously added by topology, topology should
1383 * remove them by using the dobj embedded in the link.
1384 */
1385void snd_soc_remove_dai_link(struct snd_soc_card *card,
1386 struct snd_soc_dai_link *dai_link)
1387{
1388 struct snd_soc_dai_link *link, *_link;
1389
1390 if (dai_link->dobj.type
1391 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1392 dev_err(card->dev, "Invalid dai link type %d\n",
1393 dai_link->dobj.type);
1394 return;
1395 }
1396
1397 lockdep_assert_held(&client_mutex);
1398 /* Notify the machine driver for extra destruction
1399 * on the link created by topology.
1400 */
1401 if (dai_link->dobj.type && card->remove_dai_link)
1402 card->remove_dai_link(card, dai_link);
1403
1404 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1405 if (link == dai_link) {
1406 list_del(&link->list);
1407 card->num_dai_links--;
1408 return;
1409 }
1410 }
1411}
1412EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1413
1414static void soc_set_name_prefix(struct snd_soc_card *card,
1415 struct snd_soc_component *component)
1416{
1417 int i;
1418
1419 if (card->codec_conf == NULL)
1420 return;
1421
1422 for (i = 0; i < card->num_configs; i++) {
1423 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1424 if (map->of_node && component->dev->of_node != map->of_node)
1425 continue;
1426 if (map->dev_name && strcmp(component->name, map->dev_name))
1427 continue;
1428 component->name_prefix = map->name_prefix;
1429 break;
1430 }
1431}
1432
1433static int soc_probe_component(struct snd_soc_card *card,
1434 struct snd_soc_component *component)
1435{
1436 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1437 struct snd_soc_dai *dai;
1438 int ret;
1439
1440 if (!strcmp(component->name, "snd-soc-dummy"))
1441 return 0;
1442
1443 if (component->card) {
1444 if (component->card != card) {
1445 dev_err(component->dev,
1446 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1447 card->name, component->card->name);
1448 return -ENODEV;
1449 }
1450 return 0;
1451 }
1452
1453 if (!try_module_get(component->dev->driver->owner))
1454 return -ENODEV;
1455
1456 component->card = card;
1457 dapm->card = card;
1458 soc_set_name_prefix(card, component);
1459
1460 soc_init_component_debugfs(component);
1461
1462 if (component->driver->dapm_widgets) {
1463 ret = snd_soc_dapm_new_controls(dapm,
1464 component->driver->dapm_widgets,
1465 component->driver->num_dapm_widgets);
1466
1467 if (ret != 0) {
1468 dev_err(component->dev,
1469 "Failed to create new controls %d\n", ret);
1470 goto err_probe;
1471 }
1472 }
1473
1474 list_for_each_entry(dai, &component->dai_list, list) {
1475 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1476 if (ret != 0) {
1477 dev_err(component->dev,
1478 "Failed to create DAI widgets %d\n", ret);
1479 goto err_probe;
1480 }
1481 }
1482
1483 if (component->probe) {
1484 ret = component->probe(component);
1485 if (ret < 0) {
1486 dev_err(component->dev,
1487 "ASoC: failed to probe component %d\n", ret);
1488 goto err_probe;
1489 }
1490
1491 WARN(dapm->idle_bias_off &&
1492 dapm->bias_level != SND_SOC_BIAS_OFF,
1493 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1494 component->name);
1495 }
1496
1497 /* machine specific init */
1498 if (component->init) {
1499 ret = component->init(component);
1500 if (ret < 0) {
1501 dev_err(component->dev,
1502 "Failed to do machine specific init %d\n", ret);
1503 goto err_probe;
1504 }
1505 }
1506
1507 if (component->driver->controls)
1508 snd_soc_add_component_controls(component,
1509 component->driver->controls,
1510 component->driver->num_controls);
1511 if (component->driver->dapm_routes)
1512 snd_soc_dapm_add_routes(dapm,
1513 component->driver->dapm_routes,
1514 component->driver->num_dapm_routes);
1515
1516 list_add(&dapm->list, &card->dapm_list);
1517 list_add(&component->card_list, &card->component_dev_list);
1518
1519 return 0;
1520
1521err_probe:
1522 soc_cleanup_component_debugfs(component);
1523 component->card = NULL;
1524 module_put(component->dev->driver->owner);
1525
1526 return ret;
1527}
1528
1529static void rtd_release(struct device *dev)
1530{
1531 kfree(dev);
1532}
1533
1534static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1535 const char *name)
1536{
1537 int ret = 0;
1538
1539 /* register the rtd device */
1540 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1541 if (!rtd->dev)
1542 return -ENOMEM;
1543 device_initialize(rtd->dev);
1544 rtd->dev->parent = rtd->card->dev;
1545 rtd->dev->release = rtd_release;
1546 rtd->dev->groups = soc_dev_attr_groups;
1547 dev_set_name(rtd->dev, "%s", name);
1548 dev_set_drvdata(rtd->dev, rtd);
1549 mutex_init(&rtd->pcm_mutex);
1550 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1551 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1552 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1553 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1554 ret = device_add(rtd->dev);
1555 if (ret < 0) {
1556 /* calling put_device() here to free the rtd->dev */
1557 put_device(rtd->dev);
1558 dev_err(rtd->card->dev,
1559 "ASoC: failed to register runtime device: %d\n", ret);
1560 return ret;
1561 }
1562 rtd->dev_registered = 1;
1563 return 0;
1564}
1565
1566static int soc_probe_link_components(struct snd_soc_card *card,
1567 struct snd_soc_pcm_runtime *rtd,
1568 int order)
1569{
1570 struct snd_soc_component *component;
1571 struct snd_soc_rtdcom_list *rtdcom;
1572 int ret;
1573
1574 for_each_rtdcom(rtd, rtdcom) {
1575 component = rtdcom->component;
1576
1577 if (component->driver->probe_order == order) {
1578 ret = soc_probe_component(card, component);
1579 if (ret < 0)
1580 return ret;
1581 }
1582 }
1583
1584 return 0;
1585}
1586
1587static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1588{
1589 if (dai->probed ||
1590 dai->driver->probe_order != order)
1591 return 0;
1592
1593 if (dai->driver->probe) {
1594 int ret = dai->driver->probe(dai);
1595 if (ret < 0) {
1596 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1597 dai->name, ret);
1598 return ret;
1599 }
1600 }
1601
1602 dai->probed = 1;
1603
1604 return 0;
1605}
1606
1607static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1608 struct snd_soc_pcm_runtime *rtd)
1609{
1610 int i, ret = 0;
1611
1612 for (i = 0; i < num_dais; ++i) {
1613 struct snd_soc_dai_driver *drv = dais[i]->driver;
1614
1615 if (!rtd->dai_link->no_pcm && drv->pcm_new)
1616 ret = drv->pcm_new(rtd, dais[i]);
1617 if (ret < 0) {
1618 dev_err(dais[i]->dev,
1619 "ASoC: Failed to bind %s with pcm device\n",
1620 dais[i]->name);
1621 return ret;
1622 }
1623 }
1624
1625 return 0;
1626}
1627
1628static int soc_link_dai_widgets(struct snd_soc_card *card,
1629 struct snd_soc_dai_link *dai_link,
1630 struct snd_soc_pcm_runtime *rtd)
1631{
1632 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1633 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1634 struct snd_soc_dapm_widget *sink, *source;
1635 int ret;
1636
1637 if (rtd->num_codecs > 1)
1638 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1639
1640 /* link the DAI widgets */
1641 sink = codec_dai->playback_widget;
1642 source = cpu_dai->capture_widget;
1643 if (sink && source) {
1644 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1645 dai_link->num_params,
1646 source, sink);
1647 if (ret != 0) {
1648 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1649 sink->name, source->name, ret);
1650 return ret;
1651 }
1652 }
1653
1654 sink = cpu_dai->playback_widget;
1655 source = codec_dai->capture_widget;
1656 if (sink && source) {
1657 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1658 dai_link->num_params,
1659 source, sink);
1660 if (ret != 0) {
1661 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1662 sink->name, source->name, ret);
1663 return ret;
1664 }
1665 }
1666
1667 return 0;
1668}
1669
1670static int soc_probe_link_dais(struct snd_soc_card *card,
1671 struct snd_soc_pcm_runtime *rtd, int order)
1672{
1673 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1674 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1675 int i, ret;
1676
1677 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1678 card->name, rtd->num, order);
1679
1680 /* set default power off timeout */
1681 rtd->pmdown_time = pmdown_time;
1682
1683 ret = soc_probe_dai(cpu_dai, order);
1684 if (ret)
1685 return ret;
1686
1687 /* probe the CODEC DAI */
1688 for (i = 0; i < rtd->num_codecs; i++) {
1689 ret = soc_probe_dai(rtd->codec_dais[i], order);
1690 if (ret)
1691 return ret;
1692 }
1693
1694 /* complete DAI probe during last probe */
1695 if (order != SND_SOC_COMP_ORDER_LAST)
1696 return 0;
1697
1698 /* do machine specific initialization */
1699 if (dai_link->init) {
1700 ret = dai_link->init(rtd);
1701 if (ret < 0) {
1702 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1703 dai_link->name, ret);
1704 return ret;
1705 }
1706 }
1707
1708 if (dai_link->dai_fmt)
1709 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1710
1711 ret = soc_post_component_init(rtd, dai_link->name);
1712 if (ret)
1713 return ret;
1714
1715#ifdef CONFIG_DEBUG_FS
1716 /* add DPCM sysfs entries */
1717 if (dai_link->dynamic)
1718 soc_dpcm_debugfs_add(rtd);
1719#endif
1720
1721 if (cpu_dai->driver->compress_new) {
1722 /*create compress_device"*/
1723 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1724 if (ret < 0) {
1725 dev_err(card->dev, "ASoC: can't create compress %s\n",
1726 dai_link->stream_name);
1727 return ret;
1728 }
1729 } else {
1730
1731 if (!dai_link->params) {
1732 /* create the pcm */
1733 ret = soc_new_pcm(rtd, rtd->num);
1734 if (ret < 0) {
1735 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1736 dai_link->stream_name, ret);
1737 return ret;
1738 }
1739 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1740 if (ret < 0)
1741 return ret;
1742 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1743 rtd->num_codecs, rtd);
1744 if (ret < 0)
1745 return ret;
1746 } else {
1747 INIT_DELAYED_WORK(&rtd->delayed_work,
1748 codec2codec_close_delayed_work);
1749
1750 /* link the DAI widgets */
1751 ret = soc_link_dai_widgets(card, dai_link, rtd);
1752 if (ret)
1753 return ret;
1754 }
1755 }
1756
1757 return 0;
1758}
1759
1760static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1761{
1762 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1763 struct snd_soc_component *component;
1764 const char *name;
1765 struct device_node *codec_of_node;
1766
1767 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1768 /* codecs, usually analog devices */
1769 name = aux_dev->codec_name;
1770 codec_of_node = aux_dev->codec_of_node;
1771 component = soc_find_component(codec_of_node, name);
1772 if (!component) {
1773 if (codec_of_node)
1774 name = of_node_full_name(codec_of_node);
1775 goto err_defer;
1776 }
1777 } else if (aux_dev->name) {
1778 /* generic components */
1779 name = aux_dev->name;
1780 component = soc_find_component(NULL, name);
1781 if (!component)
1782 goto err_defer;
1783 } else {
1784 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1785 return -EINVAL;
1786 }
1787
1788 component->init = aux_dev->init;
1789 list_add(&component->card_aux_list, &card->aux_comp_list);
1790
1791 return 0;
1792
1793err_defer:
1794 dev_err(card->dev, "ASoC: %s not registered\n", name);
1795 return -EPROBE_DEFER;
1796}
1797
1798static int soc_probe_aux_devices(struct snd_soc_card *card)
1799{
1800 struct snd_soc_component *comp;
1801 int order;
1802 int ret;
1803
1804 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1805 order++) {
1806 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1807 if (comp->driver->probe_order == order) {
1808 ret = soc_probe_component(card, comp);
1809 if (ret < 0) {
1810 dev_err(card->dev,
1811 "ASoC: failed to probe aux component %s %d\n",
1812 comp->name, ret);
1813 return ret;
1814 }
1815 }
1816 }
1817 }
1818
1819 return 0;
1820}
1821
1822static void soc_remove_aux_devices(struct snd_soc_card *card)
1823{
1824 struct snd_soc_component *comp, *_comp;
1825 int order;
1826
1827 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1828 order++) {
1829 list_for_each_entry_safe(comp, _comp,
1830 &card->aux_comp_list, card_aux_list) {
1831
1832 if (comp->driver->remove_order == order) {
1833 soc_remove_component(comp);
1834 /* remove it from the card's aux_comp_list */
1835 list_del(&comp->card_aux_list);
1836 }
1837 }
1838 }
1839}
1840
1841static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1842{
1843 int ret;
1844
1845 if (codec->cache_init)
1846 return 0;
1847
1848 ret = snd_soc_cache_init(codec);
1849 if (ret < 0) {
1850 dev_err(codec->dev,
1851 "ASoC: Failed to set cache compression type: %d\n",
1852 ret);
1853 return ret;
1854 }
1855 codec->cache_init = 1;
1856 return 0;
1857}
1858
1859/**
1860 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1861 * @rtd: The runtime for which the DAI link format should be changed
1862 * @dai_fmt: The new DAI link format
1863 *
1864 * This function updates the DAI link format for all DAIs connected to the DAI
1865 * link for the specified runtime.
1866 *
1867 * Note: For setups with a static format set the dai_fmt field in the
1868 * corresponding snd_dai_link struct instead of using this function.
1869 *
1870 * Returns 0 on success, otherwise a negative error code.
1871 */
1872int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1873 unsigned int dai_fmt)
1874{
1875 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1876 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1877 unsigned int i;
1878 int ret;
1879
1880 for (i = 0; i < rtd->num_codecs; i++) {
1881 struct snd_soc_dai *codec_dai = codec_dais[i];
1882
1883 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1884 if (ret != 0 && ret != -ENOTSUPP) {
1885 dev_warn(codec_dai->dev,
1886 "ASoC: Failed to set DAI format: %d\n", ret);
1887 return ret;
1888 }
1889 }
1890
1891 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1892 /* the component which has non_legacy_dai_naming is Codec */
1893 if (cpu_dai->codec ||
1894 cpu_dai->component->driver->non_legacy_dai_naming) {
1895 unsigned int inv_dai_fmt;
1896
1897 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1898 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1899 case SND_SOC_DAIFMT_CBM_CFM:
1900 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1901 break;
1902 case SND_SOC_DAIFMT_CBM_CFS:
1903 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1904 break;
1905 case SND_SOC_DAIFMT_CBS_CFM:
1906 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1907 break;
1908 case SND_SOC_DAIFMT_CBS_CFS:
1909 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1910 break;
1911 }
1912
1913 dai_fmt = inv_dai_fmt;
1914 }
1915
1916 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1917 if (ret != 0 && ret != -ENOTSUPP) {
1918 dev_warn(cpu_dai->dev,
1919 "ASoC: Failed to set DAI format: %d\n", ret);
1920 return ret;
1921 }
1922
1923 return 0;
1924}
1925EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1926
1927
1928#ifdef CONFIG_DMI
1929/* Trim special characters, and replace '-' with '_' since '-' is used to
1930 * separate different DMI fields in the card long name. Only number and
1931 * alphabet characters and a few separator characters are kept.
1932 */
1933static void cleanup_dmi_name(char *name)
1934{
1935 int i, j = 0;
1936
1937 for (i = 0; name[i]; i++) {
1938 if (isalnum(name[i]) || (name[i] == '.')
1939 || (name[i] == '_'))
1940 name[j++] = name[i];
1941 else if (name[i] == '-')
1942 name[j++] = '_';
1943 }
1944
1945 name[j] = '\0';
1946}
1947
1948/* Check if a DMI field is valid, i.e. not containing any string
1949 * in the black list.
1950 */
1951static int is_dmi_valid(const char *field)
1952{
1953 int i = 0;
1954
1955 while (dmi_blacklist[i]) {
1956 if (strstr(field, dmi_blacklist[i]))
1957 return 0;
1958 i++;
1959 }
1960
1961 return 1;
1962}
1963
1964/**
1965 * snd_soc_set_dmi_name() - Register DMI names to card
1966 * @card: The card to register DMI names
1967 * @flavour: The flavour "differentiator" for the card amongst its peers.
1968 *
1969 * An Intel machine driver may be used by many different devices but are
1970 * difficult for userspace to differentiate, since machine drivers ususally
1971 * use their own name as the card short name and leave the card long name
1972 * blank. To differentiate such devices and fix bugs due to lack of
1973 * device-specific configurations, this function allows DMI info to be used
1974 * as the sound card long name, in the format of
1975 * "vendor-product-version-board"
1976 * (Character '-' is used to separate different DMI fields here).
1977 * This will help the user space to load the device-specific Use Case Manager
1978 * (UCM) configurations for the card.
1979 *
1980 * Possible card long names may be:
1981 * DellInc.-XPS139343-01-0310JH
1982 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1983 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1984 *
1985 * This function also supports flavoring the card longname to provide
1986 * the extra differentiation, like "vendor-product-version-board-flavor".
1987 *
1988 * We only keep number and alphabet characters and a few separator characters
1989 * in the card long name since UCM in the user space uses the card long names
1990 * as card configuration directory names and AudoConf cannot support special
1991 * charactors like SPACE.
1992 *
1993 * Returns 0 on success, otherwise a negative error code.
1994 */
1995int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1996{
1997 const char *vendor, *product, *product_version, *board;
1998 size_t longname_buf_size = sizeof(card->snd_card->longname);
1999 size_t len;
2000
2001 if (card->long_name)
2002 return 0; /* long name already set by driver or from DMI */
2003
2004 /* make up dmi long name as: vendor.product.version.board */
2005 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2006 if (!vendor || !is_dmi_valid(vendor)) {
2007 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
2008 return 0;
2009 }
2010
2011
2012 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
2013 "%s", vendor);
2014 cleanup_dmi_name(card->dmi_longname);
2015
2016 product = dmi_get_system_info(DMI_PRODUCT_NAME);
2017 if (product && is_dmi_valid(product)) {
2018 len = strlen(card->dmi_longname);
2019 snprintf(card->dmi_longname + len,
2020 longname_buf_size - len,
2021 "-%s", product);
2022
2023 len++; /* skip the separator "-" */
2024 if (len < longname_buf_size)
2025 cleanup_dmi_name(card->dmi_longname + len);
2026
2027 /* some vendors like Lenovo may only put a self-explanatory
2028 * name in the product version field
2029 */
2030 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
2031 if (product_version && is_dmi_valid(product_version)) {
2032 len = strlen(card->dmi_longname);
2033 snprintf(card->dmi_longname + len,
2034 longname_buf_size - len,
2035 "-%s", product_version);
2036
2037 len++;
2038 if (len < longname_buf_size)
2039 cleanup_dmi_name(card->dmi_longname + len);
2040 }
2041 }
2042
2043 board = dmi_get_system_info(DMI_BOARD_NAME);
2044 if (board && is_dmi_valid(board)) {
2045 len = strlen(card->dmi_longname);
2046 snprintf(card->dmi_longname + len,
2047 longname_buf_size - len,
2048 "-%s", board);
2049
2050 len++;
2051 if (len < longname_buf_size)
2052 cleanup_dmi_name(card->dmi_longname + len);
2053 } else if (!product) {
2054 /* fall back to using legacy name */
2055 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
2056 return 0;
2057 }
2058
2059 /* Add flavour to dmi long name */
2060 if (flavour) {
2061 len = strlen(card->dmi_longname);
2062 snprintf(card->dmi_longname + len,
2063 longname_buf_size - len,
2064 "-%s", flavour);
2065
2066 len++;
2067 if (len < longname_buf_size)
2068 cleanup_dmi_name(card->dmi_longname + len);
2069 }
2070
2071 /* set the card long name */
2072 card->long_name = card->dmi_longname;
2073
2074 return 0;
2075}
2076EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
2077#endif /* CONFIG_DMI */
2078
2079static int snd_soc_instantiate_card(struct snd_soc_card *card)
2080{
2081 struct snd_soc_codec *codec;
2082 struct snd_soc_pcm_runtime *rtd;
2083 struct snd_soc_dai_link *dai_link;
2084 int ret, i, order;
2085
2086 mutex_lock(&client_mutex);
2087 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2088
2089 /* bind DAIs */
2090 for (i = 0; i < card->num_links; i++) {
2091 ret = soc_bind_dai_link(card, &card->dai_link[i]);
2092 if (ret != 0)
2093 goto base_error;
2094 }
2095
2096 /* bind aux_devs too */
2097 for (i = 0; i < card->num_aux_devs; i++) {
2098 ret = soc_bind_aux_dev(card, i);
2099 if (ret != 0)
2100 goto base_error;
2101 }
2102
2103 /* add predefined DAI links to the list */
2104 for (i = 0; i < card->num_links; i++)
2105 snd_soc_add_dai_link(card, card->dai_link+i);
2106
2107 /* initialize the register cache for each available codec */
2108 list_for_each_entry(codec, &codec_list, list) {
2109 if (codec->cache_init)
2110 continue;
2111 ret = snd_soc_init_codec_cache(codec);
2112 if (ret < 0)
2113 goto base_error;
2114 }
2115
2116 /* card bind complete so register a sound card */
2117 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2118 card->owner, 0, &card->snd_card);
2119 if (ret < 0) {
2120 dev_err(card->dev,
2121 "ASoC: can't create sound card for card %s: %d\n",
2122 card->name, ret);
2123 goto base_error;
2124 }
2125
2126 soc_init_card_debugfs(card);
2127
2128 card->dapm.bias_level = SND_SOC_BIAS_OFF;
2129 card->dapm.dev = card->dev;
2130 card->dapm.card = card;
2131 list_add(&card->dapm.list, &card->dapm_list);
2132
2133#ifdef CONFIG_DEBUG_FS
2134 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2135#endif
2136
2137#ifdef CONFIG_PM_SLEEP
2138 /* deferred resume work */
2139 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2140#endif
2141
2142 if (card->dapm_widgets)
2143 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2144 card->num_dapm_widgets);
2145
2146 if (card->of_dapm_widgets)
2147 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2148 card->num_of_dapm_widgets);
2149
2150 /* initialise the sound card only once */
2151 if (card->probe) {
2152 ret = card->probe(card);
2153 if (ret < 0)
2154 goto card_probe_error;
2155 }
2156
2157 /* probe all components used by DAI links on this card */
2158 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2159 order++) {
2160 list_for_each_entry(rtd, &card->rtd_list, list) {
2161 ret = soc_probe_link_components(card, rtd, order);
2162 if (ret < 0) {
2163 dev_err(card->dev,
2164 "ASoC: failed to instantiate card %d\n",
2165 ret);
2166 goto probe_dai_err;
2167 }
2168 }
2169 }
2170
2171 /* probe auxiliary components */
2172 ret = soc_probe_aux_devices(card);
2173 if (ret < 0)
2174 goto probe_dai_err;
2175
2176 /* Find new DAI links added during probing components and bind them.
2177 * Components with topology may bring new DAIs and DAI links.
2178 */
2179 list_for_each_entry(dai_link, &card->dai_link_list, list) {
2180 if (soc_is_dai_link_bound(card, dai_link))
2181 continue;
2182
2183 ret = soc_init_dai_link(card, dai_link);
2184 if (ret)
2185 goto probe_dai_err;
2186 ret = soc_bind_dai_link(card, dai_link);
2187 if (ret)
2188 goto probe_dai_err;
2189 }
2190
2191 /* probe all DAI links on this card */
2192 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2193 order++) {
2194 list_for_each_entry(rtd, &card->rtd_list, list) {
2195 ret = soc_probe_link_dais(card, rtd, order);
2196 if (ret < 0) {
2197 dev_err(card->dev,
2198 "ASoC: failed to instantiate card %d\n",
2199 ret);
2200 goto probe_dai_err;
2201 }
2202 }
2203 }
2204
2205 snd_soc_dapm_link_dai_widgets(card);
2206 snd_soc_dapm_connect_dai_link_widgets(card);
2207
2208 if (card->controls)
2209 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2210
2211 if (card->dapm_routes)
2212 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2213 card->num_dapm_routes);
2214
2215 if (card->of_dapm_routes)
2216 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2217 card->num_of_dapm_routes);
2218
2219 /* try to set some sane longname if DMI is available */
2220 snd_soc_set_dmi_name(card, NULL);
2221
2222 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2223 "%s", card->name);
2224 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2225 "%s", card->long_name ? card->long_name : card->name);
2226 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2227 "%s", card->driver_name ? card->driver_name : card->name);
2228 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2229 switch (card->snd_card->driver[i]) {
2230 case '_':
2231 case '-':
2232 case '\0':
2233 break;
2234 default:
2235 if (!isalnum(card->snd_card->driver[i]))
2236 card->snd_card->driver[i] = '_';
2237 break;
2238 }
2239 }
2240
2241 if (card->late_probe) {
2242 ret = card->late_probe(card);
2243 if (ret < 0) {
2244 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2245 card->name, ret);
2246 goto probe_aux_dev_err;
2247 }
2248 }
2249
2250 snd_soc_dapm_new_widgets(card);
2251
2252 ret = snd_card_register(card->snd_card);
2253 if (ret < 0) {
2254 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2255 ret);
2256 goto probe_aux_dev_err;
2257 }
2258
2259 card->instantiated = 1;
2260 snd_soc_dapm_sync(&card->dapm);
2261 mutex_unlock(&card->mutex);
2262 mutex_unlock(&client_mutex);
2263
2264 return 0;
2265
2266probe_aux_dev_err:
2267 soc_remove_aux_devices(card);
2268
2269probe_dai_err:
2270 soc_remove_dai_links(card);
2271
2272card_probe_error:
2273 if (card->remove)
2274 card->remove(card);
2275
2276 snd_soc_dapm_free(&card->dapm);
2277 soc_cleanup_card_debugfs(card);
2278 snd_card_free(card->snd_card);
2279
2280base_error:
2281 soc_remove_pcm_runtimes(card);
2282 mutex_unlock(&card->mutex);
2283 mutex_unlock(&client_mutex);
2284
2285 return ret;
2286}
2287
2288/* probes a new socdev */
2289static int soc_probe(struct platform_device *pdev)
2290{
2291 struct snd_soc_card *card = platform_get_drvdata(pdev);
2292
2293 /*
2294 * no card, so machine driver should be registering card
2295 * we should not be here in that case so ret error
2296 */
2297 if (!card)
2298 return -EINVAL;
2299
2300 dev_warn(&pdev->dev,
2301 "ASoC: machine %s should use snd_soc_register_card()\n",
2302 card->name);
2303
2304 /* Bodge while we unpick instantiation */
2305 card->dev = &pdev->dev;
2306
2307 return snd_soc_register_card(card);
2308}
2309
2310static int soc_cleanup_card_resources(struct snd_soc_card *card)
2311{
2312 struct snd_soc_pcm_runtime *rtd;
2313
2314 /* make sure any delayed work runs */
2315 list_for_each_entry(rtd, &card->rtd_list, list)
2316 flush_delayed_work(&rtd->delayed_work);
2317
2318 /* free the ALSA card at first; this syncs with pending operations */
2319 snd_card_free(card->snd_card);
2320
2321 /* remove and free each DAI */
2322 soc_remove_dai_links(card);
2323 soc_remove_pcm_runtimes(card);
2324
2325 /* remove auxiliary devices */
2326 soc_remove_aux_devices(card);
2327
2328 snd_soc_dapm_free(&card->dapm);
2329 soc_cleanup_card_debugfs(card);
2330
2331 /* remove the card */
2332 if (card->remove)
2333 card->remove(card);
2334
2335 return 0;
2336}
2337
2338/* removes a socdev */
2339static int soc_remove(struct platform_device *pdev)
2340{
2341 struct snd_soc_card *card = platform_get_drvdata(pdev);
2342
2343 snd_soc_unregister_card(card);
2344 return 0;
2345}
2346
2347int snd_soc_poweroff(struct device *dev)
2348{
2349 struct snd_soc_card *card = dev_get_drvdata(dev);
2350 struct snd_soc_pcm_runtime *rtd;
2351
2352 if (!card->instantiated)
2353 return 0;
2354
2355 /* Flush out pmdown_time work - we actually do want to run it
2356 * now, we're shutting down so no imminent restart. */
2357 list_for_each_entry(rtd, &card->rtd_list, list)
2358 flush_delayed_work(&rtd->delayed_work);
2359
2360 snd_soc_dapm_shutdown(card);
2361
2362 /* deactivate pins to sleep state */
2363 list_for_each_entry(rtd, &card->rtd_list, list) {
2364 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2365 int i;
2366
2367 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2368 for (i = 0; i < rtd->num_codecs; i++) {
2369 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2370 pinctrl_pm_select_sleep_state(codec_dai->dev);
2371 }
2372 }
2373
2374 return 0;
2375}
2376EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2377
2378const struct dev_pm_ops snd_soc_pm_ops = {
2379 .suspend = snd_soc_suspend,
2380 .resume = snd_soc_resume,
2381 .freeze = snd_soc_suspend,
2382 .thaw = snd_soc_resume,
2383 .poweroff = snd_soc_poweroff,
2384 .restore = snd_soc_resume,
2385};
2386EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2387
2388/* ASoC platform driver */
2389static struct platform_driver soc_driver = {
2390 .driver = {
2391 .name = "soc-audio",
2392 .pm = &snd_soc_pm_ops,
2393 },
2394 .probe = soc_probe,
2395 .remove = soc_remove,
2396};
2397
2398/**
2399 * snd_soc_cnew - create new control
2400 * @_template: control template
2401 * @data: control private data
2402 * @long_name: control long name
2403 * @prefix: control name prefix
2404 *
2405 * Create a new mixer control from a template control.
2406 *
2407 * Returns 0 for success, else error.
2408 */
2409struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2410 void *data, const char *long_name,
2411 const char *prefix)
2412{
2413 struct snd_kcontrol_new template;
2414 struct snd_kcontrol *kcontrol;
2415 char *name = NULL;
2416
2417 memcpy(&template, _template, sizeof(template));
2418 template.index = 0;
2419
2420 if (!long_name)
2421 long_name = template.name;
2422
2423 if (prefix) {
2424 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2425 if (!name)
2426 return NULL;
2427
2428 template.name = name;
2429 } else {
2430 template.name = long_name;
2431 }
2432
2433 kcontrol = snd_ctl_new1(&template, data);
2434
2435 kfree(name);
2436
2437 return kcontrol;
2438}
2439EXPORT_SYMBOL_GPL(snd_soc_cnew);
2440
2441static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2442 const struct snd_kcontrol_new *controls, int num_controls,
2443 const char *prefix, void *data)
2444{
2445 int err, i;
2446
2447 for (i = 0; i < num_controls; i++) {
2448 const struct snd_kcontrol_new *control = &controls[i];
2449 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2450 control->name, prefix));
2451 if (err < 0) {
2452 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2453 control->name, err);
2454 return err;
2455 }
2456 }
2457
2458 return 0;
2459}
2460
2461struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2462 const char *name)
2463{
2464 struct snd_card *card = soc_card->snd_card;
2465 struct snd_kcontrol *kctl;
2466
2467 if (unlikely(!name))
2468 return NULL;
2469
2470 list_for_each_entry(kctl, &card->controls, list)
2471 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2472 return kctl;
2473 return NULL;
2474}
2475EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2476
2477/**
2478 * snd_soc_add_component_controls - Add an array of controls to a component.
2479 *
2480 * @component: Component to add controls to
2481 * @controls: Array of controls to add
2482 * @num_controls: Number of elements in the array
2483 *
2484 * Return: 0 for success, else error.
2485 */
2486int snd_soc_add_component_controls(struct snd_soc_component *component,
2487 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2488{
2489 struct snd_card *card = component->card->snd_card;
2490
2491 return snd_soc_add_controls(card, component->dev, controls,
2492 num_controls, component->name_prefix, component);
2493}
2494EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2495
2496/**
2497 * snd_soc_add_codec_controls - add an array of controls to a codec.
2498 * Convenience function to add a list of controls. Many codecs were
2499 * duplicating this code.
2500 *
2501 * @codec: codec to add controls to
2502 * @controls: array of controls to add
2503 * @num_controls: number of elements in the array
2504 *
2505 * Return 0 for success, else error.
2506 */
2507int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2508 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2509{
2510 return snd_soc_add_component_controls(&codec->component, controls,
2511 num_controls);
2512}
2513EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2514
2515/**
2516 * snd_soc_add_platform_controls - add an array of controls to a platform.
2517 * Convenience function to add a list of controls.
2518 *
2519 * @platform: platform to add controls to
2520 * @controls: array of controls to add
2521 * @num_controls: number of elements in the array
2522 *
2523 * Return 0 for success, else error.
2524 */
2525int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2526 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2527{
2528 return snd_soc_add_component_controls(&platform->component, controls,
2529 num_controls);
2530}
2531EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2532
2533/**
2534 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2535 * Convenience function to add a list of controls.
2536 *
2537 * @soc_card: SoC card to add controls to
2538 * @controls: array of controls to add
2539 * @num_controls: number of elements in the array
2540 *
2541 * Return 0 for success, else error.
2542 */
2543int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2544 const struct snd_kcontrol_new *controls, int num_controls)
2545{
2546 struct snd_card *card = soc_card->snd_card;
2547
2548 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2549 NULL, soc_card);
2550}
2551EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2552
2553/**
2554 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2555 * Convienience function to add a list of controls.
2556 *
2557 * @dai: DAI to add controls to
2558 * @controls: array of controls to add
2559 * @num_controls: number of elements in the array
2560 *
2561 * Return 0 for success, else error.
2562 */
2563int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2564 const struct snd_kcontrol_new *controls, int num_controls)
2565{
2566 struct snd_card *card = dai->component->card->snd_card;
2567
2568 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2569 NULL, dai);
2570}
2571EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2572
2573/**
2574 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2575 * @dai: DAI
2576 * @clk_id: DAI specific clock ID
2577 * @freq: new clock frequency in Hz
2578 * @dir: new clock direction - input/output.
2579 *
2580 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2581 */
2582int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2583 unsigned int freq, int dir)
2584{
2585 if (dai->driver->ops->set_sysclk)
2586 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2587
2588 return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2589 freq, dir);
2590}
2591EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2592
2593/**
2594 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2595 * @codec: CODEC
2596 * @clk_id: DAI specific clock ID
2597 * @source: Source for the clock
2598 * @freq: new clock frequency in Hz
2599 * @dir: new clock direction - input/output.
2600 *
2601 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2602 */
2603int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2604 int source, unsigned int freq, int dir)
2605{
2606 if (codec->driver->set_sysclk)
2607 return codec->driver->set_sysclk(codec, clk_id, source,
2608 freq, dir);
2609 else
2610 return -ENOTSUPP;
2611}
2612EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2613
2614/**
2615 * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2616 * @component: COMPONENT
2617 * @clk_id: DAI specific clock ID
2618 * @source: Source for the clock
2619 * @freq: new clock frequency in Hz
2620 * @dir: new clock direction - input/output.
2621 *
2622 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2623 */
2624int snd_soc_component_set_sysclk(struct snd_soc_component *component, int clk_id,
2625 int source, unsigned int freq, int dir)
2626{
2627 /* will be removed */
2628 if (component->set_sysclk)
2629 return component->set_sysclk(component, clk_id, source,
2630 freq, dir);
2631
2632 if (component->driver->set_sysclk)
2633 return component->driver->set_sysclk(component, clk_id, source,
2634 freq, dir);
2635
2636 return -ENOTSUPP;
2637}
2638EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2639
2640/**
2641 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2642 * @dai: DAI
2643 * @div_id: DAI specific clock divider ID
2644 * @div: new clock divisor.
2645 *
2646 * Configures the clock dividers. This is used to derive the best DAI bit and
2647 * frame clocks from the system or master clock. It's best to set the DAI bit
2648 * and frame clocks as low as possible to save system power.
2649 */
2650int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2651 int div_id, int div)
2652{
2653 if (dai->driver->ops->set_clkdiv)
2654 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2655 else
2656 return -EINVAL;
2657}
2658EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2659
2660/**
2661 * snd_soc_dai_set_pll - configure DAI PLL.
2662 * @dai: DAI
2663 * @pll_id: DAI specific PLL ID
2664 * @source: DAI specific source for the PLL
2665 * @freq_in: PLL input clock frequency in Hz
2666 * @freq_out: requested PLL output clock frequency in Hz
2667 *
2668 * Configures and enables PLL to generate output clock based on input clock.
2669 */
2670int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2671 unsigned int freq_in, unsigned int freq_out)
2672{
2673 if (dai->driver->ops->set_pll)
2674 return dai->driver->ops->set_pll(dai, pll_id, source,
2675 freq_in, freq_out);
2676
2677 return snd_soc_component_set_pll(dai->component, pll_id, source,
2678 freq_in, freq_out);
2679}
2680EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2681
2682/*
2683 * snd_soc_codec_set_pll - configure codec PLL.
2684 * @codec: CODEC
2685 * @pll_id: DAI specific PLL ID
2686 * @source: DAI specific source for the PLL
2687 * @freq_in: PLL input clock frequency in Hz
2688 * @freq_out: requested PLL output clock frequency in Hz
2689 *
2690 * Configures and enables PLL to generate output clock based on input clock.
2691 */
2692int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2693 unsigned int freq_in, unsigned int freq_out)
2694{
2695 if (codec->driver->set_pll)
2696 return codec->driver->set_pll(codec, pll_id, source,
2697 freq_in, freq_out);
2698 else
2699 return -EINVAL;
2700}
2701EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2702
2703/*
2704 * snd_soc_component_set_pll - configure component PLL.
2705 * @component: COMPONENT
2706 * @pll_id: DAI specific PLL ID
2707 * @source: DAI specific source for the PLL
2708 * @freq_in: PLL input clock frequency in Hz
2709 * @freq_out: requested PLL output clock frequency in Hz
2710 *
2711 * Configures and enables PLL to generate output clock based on input clock.
2712 */
2713int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2714 int source, unsigned int freq_in,
2715 unsigned int freq_out)
2716{
2717 /* will be removed */
2718 if (component->set_pll)
2719 return component->set_pll(component, pll_id, source,
2720 freq_in, freq_out);
2721
2722 if (component->driver->set_pll)
2723 return component->driver->set_pll(component, pll_id, source,
2724 freq_in, freq_out);
2725
2726 return -EINVAL;
2727}
2728EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2729
2730/**
2731 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2732 * @dai: DAI
2733 * @ratio: Ratio of BCLK to Sample rate.
2734 *
2735 * Configures the DAI for a preset BCLK to sample rate ratio.
2736 */
2737int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2738{
2739 if (dai->driver->ops->set_bclk_ratio)
2740 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2741 else
2742 return -EINVAL;
2743}
2744EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2745
2746/**
2747 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2748 * @dai: DAI
2749 * @fmt: SND_SOC_DAIFMT_* format value.
2750 *
2751 * Configures the DAI hardware format and clocking.
2752 */
2753int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2754{
2755 if (dai->driver == NULL)
2756 return -EINVAL;
2757 if (dai->driver->ops->set_fmt == NULL)
2758 return -ENOTSUPP;
2759 return dai->driver->ops->set_fmt(dai, fmt);
2760}
2761EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2762
2763/**
2764 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2765 * @slots: Number of slots in use.
2766 * @tx_mask: bitmask representing active TX slots.
2767 * @rx_mask: bitmask representing active RX slots.
2768 *
2769 * Generates the TDM tx and rx slot default masks for DAI.
2770 */
2771static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2772 unsigned int *tx_mask,
2773 unsigned int *rx_mask)
2774{
2775 if (*tx_mask || *rx_mask)
2776 return 0;
2777
2778 if (!slots)
2779 return -EINVAL;
2780
2781 *tx_mask = (1 << slots) - 1;
2782 *rx_mask = (1 << slots) - 1;
2783
2784 return 0;
2785}
2786
2787/**
2788 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2789 * @dai: The DAI to configure
2790 * @tx_mask: bitmask representing active TX slots.
2791 * @rx_mask: bitmask representing active RX slots.
2792 * @slots: Number of slots in use.
2793 * @slot_width: Width in bits for each slot.
2794 *
2795 * This function configures the specified DAI for TDM operation. @slot contains
2796 * the total number of slots of the TDM stream and @slot_with the width of each
2797 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2798 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2799 * DAI should write to or read from. If a bit is set the corresponding slot is
2800 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2801 * the first slot, bit 1 to the second slot and so on. The first active slot
2802 * maps to the first channel of the DAI, the second active slot to the second
2803 * channel and so on.
2804 *
2805 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2806 * @rx_mask and @slot_width will be ignored.
2807 *
2808 * Returns 0 on success, a negative error code otherwise.
2809 */
2810int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2811 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2812{
2813 if (dai->driver->ops->xlate_tdm_slot_mask)
2814 dai->driver->ops->xlate_tdm_slot_mask(slots,
2815 &tx_mask, &rx_mask);
2816 else
2817 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2818
2819 dai->tx_mask = tx_mask;
2820 dai->rx_mask = rx_mask;
2821
2822 if (dai->driver->ops->set_tdm_slot)
2823 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2824 slots, slot_width);
2825 else
2826 return -ENOTSUPP;
2827}
2828EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2829
2830/**
2831 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2832 * @dai: DAI
2833 * @tx_num: how many TX channels
2834 * @tx_slot: pointer to an array which imply the TX slot number channel
2835 * 0~num-1 uses
2836 * @rx_num: how many RX channels
2837 * @rx_slot: pointer to an array which imply the RX slot number channel
2838 * 0~num-1 uses
2839 *
2840 * configure the relationship between channel number and TDM slot number.
2841 */
2842int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2843 unsigned int tx_num, unsigned int *tx_slot,
2844 unsigned int rx_num, unsigned int *rx_slot)
2845{
2846 if (dai->driver->ops->set_channel_map)
2847 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2848 rx_num, rx_slot);
2849 else
2850 return -EINVAL;
2851}
2852EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2853
2854/**
2855 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2856 * @dai: DAI
2857 * @tristate: tristate enable
2858 *
2859 * Tristates the DAI so that others can use it.
2860 */
2861int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2862{
2863 if (dai->driver->ops->set_tristate)
2864 return dai->driver->ops->set_tristate(dai, tristate);
2865 else
2866 return -EINVAL;
2867}
2868EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2869
2870/**
2871 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2872 * @dai: DAI
2873 * @mute: mute enable
2874 * @direction: stream to mute
2875 *
2876 * Mutes the DAI DAC.
2877 */
2878int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2879 int direction)
2880{
2881 if (!dai->driver)
2882 return -ENOTSUPP;
2883
2884 if (dai->driver->ops->mute_stream)
2885 return dai->driver->ops->mute_stream(dai, mute, direction);
2886 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2887 dai->driver->ops->digital_mute)
2888 return dai->driver->ops->digital_mute(dai, mute);
2889 else
2890 return -ENOTSUPP;
2891}
2892EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2893
2894/**
2895 * snd_soc_register_card - Register a card with the ASoC core
2896 *
2897 * @card: Card to register
2898 *
2899 */
2900int snd_soc_register_card(struct snd_soc_card *card)
2901{
2902 int i, ret;
2903 struct snd_soc_pcm_runtime *rtd;
2904
2905 if (!card->name || !card->dev)
2906 return -EINVAL;
2907
2908 for (i = 0; i < card->num_links; i++) {
2909 struct snd_soc_dai_link *link = &card->dai_link[i];
2910
2911 ret = soc_init_dai_link(card, link);
2912 if (ret) {
2913 dev_err(card->dev, "ASoC: failed to init link %s\n",
2914 link->name);
2915 return ret;
2916 }
2917 }
2918
2919 dev_set_drvdata(card->dev, card);
2920
2921 snd_soc_initialize_card_lists(card);
2922
2923 INIT_LIST_HEAD(&card->dai_link_list);
2924 card->num_dai_links = 0;
2925
2926 INIT_LIST_HEAD(&card->rtd_list);
2927 card->num_rtd = 0;
2928
2929 INIT_LIST_HEAD(&card->dapm_dirty);
2930 INIT_LIST_HEAD(&card->dobj_list);
2931 card->instantiated = 0;
2932 mutex_init(&card->mutex);
2933 mutex_init(&card->dapm_mutex);
2934
2935 ret = snd_soc_instantiate_card(card);
2936 if (ret != 0)
2937 return ret;
2938
2939 /* deactivate pins to sleep state */
2940 list_for_each_entry(rtd, &card->rtd_list, list) {
2941 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2942 int j;
2943
2944 for (j = 0; j < rtd->num_codecs; j++) {
2945 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2946 if (!codec_dai->active)
2947 pinctrl_pm_select_sleep_state(codec_dai->dev);
2948 }
2949
2950 if (!cpu_dai->active)
2951 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2952 }
2953
2954 return ret;
2955}
2956EXPORT_SYMBOL_GPL(snd_soc_register_card);
2957
2958/**
2959 * snd_soc_unregister_card - Unregister a card with the ASoC core
2960 *
2961 * @card: Card to unregister
2962 *
2963 */
2964int snd_soc_unregister_card(struct snd_soc_card *card)
2965{
2966 if (card->instantiated) {
2967 card->instantiated = false;
2968 snd_soc_dapm_shutdown(card);
2969 soc_cleanup_card_resources(card);
2970 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2971 }
2972
2973 return 0;
2974}
2975EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2976
2977/*
2978 * Simplify DAI link configuration by removing ".-1" from device names
2979 * and sanitizing names.
2980 */
2981static char *fmt_single_name(struct device *dev, int *id)
2982{
2983 char *found, name[NAME_SIZE];
2984 int id1, id2;
2985
2986 if (dev_name(dev) == NULL)
2987 return NULL;
2988
2989 strlcpy(name, dev_name(dev), NAME_SIZE);
2990
2991 /* are we a "%s.%d" name (platform and SPI components) */
2992 found = strstr(name, dev->driver->name);
2993 if (found) {
2994 /* get ID */
2995 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2996
2997 /* discard ID from name if ID == -1 */
2998 if (*id == -1)
2999 found[strlen(dev->driver->name)] = '\0';
3000 }
3001
3002 } else {
3003 /* I2C component devices are named "bus-addr" */
3004 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3005 char tmp[NAME_SIZE];
3006
3007 /* create unique ID number from I2C addr and bus */
3008 *id = ((id1 & 0xffff) << 16) + id2;
3009
3010 /* sanitize component name for DAI link creation */
3011 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3012 strlcpy(name, tmp, NAME_SIZE);
3013 } else
3014 *id = 0;
3015 }
3016
3017 return kstrdup(name, GFP_KERNEL);
3018}
3019
3020/*
3021 * Simplify DAI link naming for single devices with multiple DAIs by removing
3022 * any ".-1" and using the DAI name (instead of device name).
3023 */
3024static inline char *fmt_multiple_name(struct device *dev,
3025 struct snd_soc_dai_driver *dai_drv)
3026{
3027 if (dai_drv->name == NULL) {
3028 dev_err(dev,
3029 "ASoC: error - multiple DAI %s registered with no name\n",
3030 dev_name(dev));
3031 return NULL;
3032 }
3033
3034 return kstrdup(dai_drv->name, GFP_KERNEL);
3035}
3036
3037/**
3038 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
3039 *
3040 * @component: The component for which the DAIs should be unregistered
3041 */
3042static void snd_soc_unregister_dais(struct snd_soc_component *component)
3043{
3044 struct snd_soc_dai *dai, *_dai;
3045
3046 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
3047 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
3048 dai->name);
3049 list_del(&dai->list);
3050 kfree(dai->name);
3051 kfree(dai);
3052 }
3053}
3054
3055/* Create a DAI and add it to the component's DAI list */
3056static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
3057 struct snd_soc_dai_driver *dai_drv,
3058 bool legacy_dai_naming)
3059{
3060 struct device *dev = component->dev;
3061 struct snd_soc_dai *dai;
3062
3063 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
3064
3065 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3066 if (dai == NULL)
3067 return NULL;
3068
3069 /*
3070 * Back in the old days when we still had component-less DAIs,
3071 * instead of having a static name, component-less DAIs would
3072 * inherit the name of the parent device so it is possible to
3073 * register multiple instances of the DAI. We still need to keep
3074 * the same naming style even though those DAIs are not
3075 * component-less anymore.
3076 */
3077 if (legacy_dai_naming &&
3078 (dai_drv->id == 0 || dai_drv->name == NULL)) {
3079 dai->name = fmt_single_name(dev, &dai->id);
3080 } else {
3081 dai->name = fmt_multiple_name(dev, dai_drv);
3082 if (dai_drv->id)
3083 dai->id = dai_drv->id;
3084 else
3085 dai->id = component->num_dai;
3086 }
3087 if (dai->name == NULL) {
3088 kfree(dai);
3089 return NULL;
3090 }
3091
3092 dai->component = component;
3093 dai->dev = dev;
3094 dai->driver = dai_drv;
3095 if (!dai->driver->ops)
3096 dai->driver->ops = &null_dai_ops;
3097
3098 list_add_tail(&dai->list, &component->dai_list);
3099 component->num_dai++;
3100
3101 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3102 return dai;
3103}
3104
3105/**
3106 * snd_soc_register_dais - Register a DAI with the ASoC core
3107 *
3108 * @component: The component the DAIs are registered for
3109 * @dai_drv: DAI driver to use for the DAIs
3110 * @count: Number of DAIs
3111 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3112 * parent's name.
3113 */
3114static int snd_soc_register_dais(struct snd_soc_component *component,
3115 struct snd_soc_dai_driver *dai_drv, size_t count,
3116 bool legacy_dai_naming)
3117{
3118 struct device *dev = component->dev;
3119 struct snd_soc_dai *dai;
3120 unsigned int i;
3121 int ret;
3122
3123 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
3124
3125 for (i = 0; i < count; i++) {
3126
3127 dai = soc_add_dai(component, dai_drv + i,
3128 count == 1 && legacy_dai_naming);
3129 if (dai == NULL) {
3130 ret = -ENOMEM;
3131 goto err;
3132 }
3133 }
3134
3135 return 0;
3136
3137err:
3138 snd_soc_unregister_dais(component);
3139
3140 return ret;
3141}
3142
3143/**
3144 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
3145 *
3146 * @component: The component the DAIs are registered for
3147 * @dai_drv: DAI driver to use for the DAI
3148 *
3149 * Topology can use this API to register DAIs when probing a component.
3150 * These DAIs's widgets will be freed in the card cleanup and the DAIs
3151 * will be freed in the component cleanup.
3152 */
3153int snd_soc_register_dai(struct snd_soc_component *component,
3154 struct snd_soc_dai_driver *dai_drv)
3155{
3156 struct snd_soc_dapm_context *dapm =
3157 snd_soc_component_get_dapm(component);
3158 struct snd_soc_dai *dai;
3159 int ret;
3160
3161 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
3162 dev_err(component->dev, "Invalid dai type %d\n",
3163 dai_drv->dobj.type);
3164 return -EINVAL;
3165 }
3166
3167 lockdep_assert_held(&client_mutex);
3168 dai = soc_add_dai(component, dai_drv, false);
3169 if (!dai)
3170 return -ENOMEM;
3171
3172 /* Create the DAI widgets here. After adding DAIs, topology may
3173 * also add routes that need these widgets as source or sink.
3174 */
3175 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
3176 if (ret != 0) {
3177 dev_err(component->dev,
3178 "Failed to create DAI widgets %d\n", ret);
3179 }
3180
3181 return ret;
3182}
3183EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3184
3185static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
3186 enum snd_soc_dapm_type type, int subseq)
3187{
3188 struct snd_soc_component *component = dapm->component;
3189
3190 component->driver->seq_notifier(component, type, subseq);
3191}
3192
3193static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3194 int event)
3195{
3196 struct snd_soc_component *component = dapm->component;
3197
3198 return component->driver->stream_event(component, event);
3199}
3200
3201static int snd_soc_component_drv_pcm_new(struct snd_soc_component *component,
3202 struct snd_soc_pcm_runtime *rtd)
3203{
3204 if (component->driver->pcm_new)
3205 return component->driver->pcm_new(rtd);
3206
3207 return 0;
3208}
3209
3210static void snd_soc_component_drv_pcm_free(struct snd_soc_component *component,
3211 struct snd_pcm *pcm)
3212{
3213 if (component->driver->pcm_free)
3214 component->driver->pcm_free(pcm);
3215}
3216
3217static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3218 enum snd_soc_bias_level level)
3219{
3220 struct snd_soc_component *component = dapm->component;
3221
3222 return component->driver->set_bias_level(component, level);
3223}
3224
3225static int snd_soc_component_initialize(struct snd_soc_component *component,
3226 const struct snd_soc_component_driver *driver, struct device *dev)
3227{
3228 struct snd_soc_dapm_context *dapm;
3229
3230 component->name = fmt_single_name(dev, &component->id);
3231 if (!component->name) {
3232 dev_err(dev, "ASoC: Failed to allocate name\n");
3233 return -ENOMEM;
3234 }
3235
3236 component->dev = dev;
3237 component->driver = driver;
3238 component->probe = component->driver->probe;
3239 component->remove = component->driver->remove;
3240 component->suspend = component->driver->suspend;
3241 component->resume = component->driver->resume;
3242 component->set_sysclk = component->driver->set_sysclk;
3243 component->set_pll = component->driver->set_pll;
3244 component->set_jack = component->driver->set_jack;
3245 component->pcm_new = snd_soc_component_drv_pcm_new;
3246 component->pcm_free = snd_soc_component_drv_pcm_free;
3247
3248 dapm = snd_soc_component_get_dapm(component);
3249 dapm->dev = dev;
3250 dapm->component = component;
3251 dapm->bias_level = SND_SOC_BIAS_OFF;
3252 dapm->idle_bias_off = !driver->idle_bias_on;
3253 dapm->suspend_bias_off = driver->suspend_bias_off;
3254 if (driver->seq_notifier)
3255 dapm->seq_notifier = snd_soc_component_seq_notifier;
3256 if (driver->stream_event)
3257 dapm->stream_event = snd_soc_component_stream_event;
3258 if (driver->set_bias_level)
3259 dapm->set_bias_level = snd_soc_component_set_bias_level;
3260
3261 INIT_LIST_HEAD(&component->dai_list);
3262 mutex_init(&component->io_mutex);
3263
3264 return 0;
3265}
3266
3267static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3268{
3269 int val_bytes = regmap_get_val_bytes(component->regmap);
3270
3271 /* Errors are legitimate for non-integer byte multiples */
3272 if (val_bytes > 0)
3273 component->val_bytes = val_bytes;
3274}
3275
3276#ifdef CONFIG_REGMAP
3277
3278/**
3279 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3280 * @component: The component for which to initialize the regmap instance
3281 * @regmap: The regmap instance that should be used by the component
3282 *
3283 * This function allows deferred assignment of the regmap instance that is
3284 * associated with the component. Only use this if the regmap instance is not
3285 * yet ready when the component is registered. The function must also be called
3286 * before the first IO attempt of the component.
3287 */
3288void snd_soc_component_init_regmap(struct snd_soc_component *component,
3289 struct regmap *regmap)
3290{
3291 component->regmap = regmap;
3292 snd_soc_component_setup_regmap(component);
3293}
3294EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3295
3296/**
3297 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3298 * @component: The component for which to de-initialize the regmap instance
3299 *
3300 * Calls regmap_exit() on the regmap instance associated to the component and
3301 * removes the regmap instance from the component.
3302 *
3303 * This function should only be used if snd_soc_component_init_regmap() was used
3304 * to initialize the regmap instance.
3305 */
3306void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3307{
3308 regmap_exit(component->regmap);
3309 component->regmap = NULL;
3310}
3311EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3312
3313#endif
3314
3315static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3316{
3317 if (!component->write && !component->read) {
3318 if (!component->regmap)
3319 component->regmap = dev_get_regmap(component->dev, NULL);
3320 if (component->regmap)
3321 snd_soc_component_setup_regmap(component);
3322 }
3323
3324 list_add(&component->list, &component_list);
3325 INIT_LIST_HEAD(&component->dobj_list);
3326}
3327
3328static void snd_soc_component_add(struct snd_soc_component *component)
3329{
3330 mutex_lock(&client_mutex);
3331 snd_soc_component_add_unlocked(component);
3332 mutex_unlock(&client_mutex);
3333}
3334
3335static void snd_soc_component_cleanup(struct snd_soc_component *component)
3336{
3337 snd_soc_unregister_dais(component);
3338 kfree(component->name);
3339}
3340
3341static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3342{
3343 struct snd_soc_card *card = component->card;
3344
3345 if (card)
3346 snd_soc_unregister_card(card);
3347
3348 list_del(&component->list);
3349}
3350
3351#define ENDIANNESS_MAP(name) \
3352 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3353static u64 endianness_format_map[] = {
3354 ENDIANNESS_MAP(S16_),
3355 ENDIANNESS_MAP(U16_),
3356 ENDIANNESS_MAP(S24_),
3357 ENDIANNESS_MAP(U24_),
3358 ENDIANNESS_MAP(S32_),
3359 ENDIANNESS_MAP(U32_),
3360 ENDIANNESS_MAP(S24_3),
3361 ENDIANNESS_MAP(U24_3),
3362 ENDIANNESS_MAP(S20_3),
3363 ENDIANNESS_MAP(U20_3),
3364 ENDIANNESS_MAP(S18_3),
3365 ENDIANNESS_MAP(U18_3),
3366 ENDIANNESS_MAP(FLOAT_),
3367 ENDIANNESS_MAP(FLOAT64_),
3368 ENDIANNESS_MAP(IEC958_SUBFRAME_),
3369};
3370
3371/*
3372 * Fix up the DAI formats for endianness: codecs don't actually see
3373 * the endianness of the data but we're using the CPU format
3374 * definitions which do need to include endianness so we ensure that
3375 * codec DAIs always have both big and little endian variants set.
3376 */
3377static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3378{
3379 int i;
3380
3381 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3382 if (stream->formats & endianness_format_map[i])
3383 stream->formats |= endianness_format_map[i];
3384}
3385
3386int snd_soc_add_component(struct device *dev,
3387 struct snd_soc_component *component,
3388 const struct snd_soc_component_driver *component_driver,
3389 struct snd_soc_dai_driver *dai_drv,
3390 int num_dai)
3391{
3392 int ret;
3393 int i;
3394
3395 ret = snd_soc_component_initialize(component, component_driver, dev);
3396 if (ret)
3397 goto err_free;
3398
3399 component->ignore_pmdown_time = true;
3400 component->registered_as_component = true;
3401
3402 if (component_driver->endianness) {
3403 for (i = 0; i < num_dai; i++) {
3404 convert_endianness_formats(&dai_drv[i].playback);
3405 convert_endianness_formats(&dai_drv[i].capture);
3406 }
3407 }
3408
3409 ret = snd_soc_register_dais(component, dai_drv, num_dai,
3410 !component_driver->non_legacy_dai_naming);
3411 if (ret < 0) {
3412 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3413 goto err_cleanup;
3414 }
3415
3416 snd_soc_component_add(component);
3417
3418 return 0;
3419
3420err_cleanup:
3421 snd_soc_component_cleanup(component);
3422err_free:
3423 return ret;
3424}
3425EXPORT_SYMBOL_GPL(snd_soc_add_component);
3426
3427int snd_soc_register_component(struct device *dev,
3428 const struct snd_soc_component_driver *component_driver,
3429 struct snd_soc_dai_driver *dai_drv,
3430 int num_dai)
3431{
3432 struct snd_soc_component *component;
3433
3434 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
3435 if (!component)
3436 return -ENOMEM;
3437
3438 return snd_soc_add_component(dev, component, component_driver,
3439 dai_drv, num_dai);
3440}
3441EXPORT_SYMBOL_GPL(snd_soc_register_component);
3442
3443/**
3444 * snd_soc_unregister_component - Unregister all related component
3445 * from the ASoC core
3446 *
3447 * @dev: The device to unregister
3448 */
3449static int __snd_soc_unregister_component(struct device *dev)
3450{
3451 struct snd_soc_component *component;
3452 int found = 0;
3453
3454 mutex_lock(&client_mutex);
3455 list_for_each_entry(component, &component_list, list) {
3456 if (dev != component->dev ||
3457 !component->registered_as_component)
3458 continue;
3459
3460 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL);
3461 snd_soc_component_del_unlocked(component);
3462 found = 1;
3463 break;
3464 }
3465 mutex_unlock(&client_mutex);
3466
3467 if (found) {
3468 snd_soc_component_cleanup(component);
3469 }
3470
3471 return found;
3472}
3473
3474void snd_soc_unregister_component(struct device *dev)
3475{
3476 while (__snd_soc_unregister_component(dev));
3477}
3478EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3479
3480struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
3481 const char *driver_name)
3482{
3483 struct snd_soc_component *component;
3484 struct snd_soc_component *ret;
3485
3486 ret = NULL;
3487 mutex_lock(&client_mutex);
3488 list_for_each_entry(component, &component_list, list) {
3489 if (dev != component->dev)
3490 continue;
3491
3492 if (driver_name &&
3493 (driver_name != component->driver->name) &&
3494 (strcmp(component->driver->name, driver_name) != 0))
3495 continue;
3496
3497 ret = component;
3498 break;
3499 }
3500 mutex_unlock(&client_mutex);
3501
3502 return ret;
3503}
3504EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
3505
3506static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3507{
3508 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3509
3510 return platform->driver->probe(platform);
3511}
3512
3513static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3514{
3515 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3516
3517 platform->driver->remove(platform);
3518}
3519
3520static int snd_soc_platform_drv_pcm_new(struct snd_soc_component *component,
3521 struct snd_soc_pcm_runtime *rtd)
3522{
3523 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3524
3525 if (platform->driver->pcm_new)
3526 return platform->driver->pcm_new(rtd);
3527
3528 return 0;
3529}
3530
3531static void snd_soc_platform_drv_pcm_free(struct snd_soc_component *component,
3532 struct snd_pcm *pcm)
3533{
3534 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3535
3536 if (platform->driver->pcm_free)
3537 platform->driver->pcm_free(pcm);
3538}
3539
3540/**
3541 * snd_soc_add_platform - Add a platform to the ASoC core
3542 * @dev: The parent device for the platform
3543 * @platform: The platform to add
3544 * @platform_drv: The driver for the platform
3545 */
3546int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3547 const struct snd_soc_platform_driver *platform_drv)
3548{
3549 int ret;
3550
3551 ret = snd_soc_component_initialize(&platform->component,
3552 &platform_drv->component_driver, dev);
3553 if (ret)
3554 return ret;
3555
3556 platform->dev = dev;
3557 platform->driver = platform_drv;
3558
3559 if (platform_drv->probe)
3560 platform->component.probe = snd_soc_platform_drv_probe;
3561 if (platform_drv->remove)
3562 platform->component.remove = snd_soc_platform_drv_remove;
3563 if (platform_drv->pcm_new)
3564 platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
3565 if (platform_drv->pcm_free)
3566 platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
3567
3568#ifdef CONFIG_DEBUG_FS
3569 platform->component.debugfs_prefix = "platform";
3570#endif
3571
3572 mutex_lock(&client_mutex);
3573 snd_soc_component_add_unlocked(&platform->component);
3574 list_add(&platform->list, &platform_list);
3575 mutex_unlock(&client_mutex);
3576
3577 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3578 platform->component.name);
3579
3580 return 0;
3581}
3582EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3583
3584/**
3585 * snd_soc_register_platform - Register a platform with the ASoC core
3586 *
3587 * @dev: The device for the platform
3588 * @platform_drv: The driver for the platform
3589 */
3590int snd_soc_register_platform(struct device *dev,
3591 const struct snd_soc_platform_driver *platform_drv)
3592{
3593 struct snd_soc_platform *platform;
3594 int ret;
3595
3596 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3597
3598 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3599 if (platform == NULL)
3600 return -ENOMEM;
3601
3602 ret = snd_soc_add_platform(dev, platform, platform_drv);
3603 if (ret)
3604 kfree(platform);
3605
3606 return ret;
3607}
3608EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3609
3610/**
3611 * snd_soc_remove_platform - Remove a platform from the ASoC core
3612 * @platform: the platform to remove
3613 */
3614void snd_soc_remove_platform(struct snd_soc_platform *platform)
3615{
3616
3617 mutex_lock(&client_mutex);
3618 list_del(&platform->list);
3619 snd_soc_component_del_unlocked(&platform->component);
3620 mutex_unlock(&client_mutex);
3621
3622 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3623 platform->component.name);
3624
3625 snd_soc_component_cleanup(&platform->component);
3626}
3627EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3628
3629struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3630{
3631 struct snd_soc_platform *platform;
3632
3633 mutex_lock(&client_mutex);
3634 list_for_each_entry(platform, &platform_list, list) {
3635 if (dev == platform->dev) {
3636 mutex_unlock(&client_mutex);
3637 return platform;
3638 }
3639 }
3640 mutex_unlock(&client_mutex);
3641
3642 return NULL;
3643}
3644EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3645
3646/**
3647 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3648 *
3649 * @dev: platform to unregister
3650 */
3651void snd_soc_unregister_platform(struct device *dev)
3652{
3653 struct snd_soc_platform *platform;
3654
3655 platform = snd_soc_lookup_platform(dev);
3656 if (!platform)
3657 return;
3658
3659 snd_soc_remove_platform(platform);
3660 kfree(platform);
3661}
3662EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3663
3664static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3665{
3666 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3667
3668 return codec->driver->probe(codec);
3669}
3670
3671static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3672{
3673 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3674
3675 codec->driver->remove(codec);
3676}
3677
3678static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3679{
3680 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3681
3682 return codec->driver->suspend(codec);
3683}
3684
3685static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3686{
3687 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3688
3689 return codec->driver->resume(codec);
3690}
3691
3692static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3693 unsigned int reg, unsigned int val)
3694{
3695 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3696
3697 return codec->driver->write(codec, reg, val);
3698}
3699
3700static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3701 unsigned int reg, unsigned int *val)
3702{
3703 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3704
3705 *val = codec->driver->read(codec, reg);
3706
3707 return 0;
3708}
3709
3710static int snd_soc_codec_set_sysclk_(struct snd_soc_component *component,
3711 int clk_id, int source, unsigned int freq, int dir)
3712{
3713 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3714
3715 return snd_soc_codec_set_sysclk(codec, clk_id, source, freq, dir);
3716}
3717
3718static int snd_soc_codec_set_pll_(struct snd_soc_component *component,
3719 int pll_id, int source, unsigned int freq_in,
3720 unsigned int freq_out)
3721{
3722 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3723
3724 return snd_soc_codec_set_pll(codec, pll_id, source, freq_in, freq_out);
3725}
3726
3727static int snd_soc_codec_set_jack_(struct snd_soc_component *component,
3728 struct snd_soc_jack *jack, void *data)
3729{
3730 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3731
3732 return snd_soc_codec_set_jack(codec, jack, data);
3733}
3734
3735static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3736 enum snd_soc_bias_level level)
3737{
3738 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3739
3740 return codec->driver->set_bias_level(codec, level);
3741}
3742
3743/**
3744 * snd_soc_register_codec - Register a codec with the ASoC core
3745 *
3746 * @dev: The parent device for this codec
3747 * @codec_drv: Codec driver
3748 * @dai_drv: The associated DAI driver
3749 * @num_dai: Number of DAIs
3750 */
3751int snd_soc_register_codec(struct device *dev,
3752 const struct snd_soc_codec_driver *codec_drv,
3753 struct snd_soc_dai_driver *dai_drv,
3754 int num_dai)
3755{
3756 struct snd_soc_dapm_context *dapm;
3757 struct snd_soc_codec *codec;
3758 struct snd_soc_dai *dai;
3759 int ret, i;
3760
3761 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3762
3763 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3764 if (codec == NULL)
3765 return -ENOMEM;
3766
3767 codec->component.codec = codec;
3768
3769 ret = snd_soc_component_initialize(&codec->component,
3770 &codec_drv->component_driver, dev);
3771 if (ret)
3772 goto err_free;
3773
3774 if (codec_drv->probe)
3775 codec->component.probe = snd_soc_codec_drv_probe;
3776 if (codec_drv->remove)
3777 codec->component.remove = snd_soc_codec_drv_remove;
3778 if (codec_drv->suspend)
3779 codec->component.suspend = snd_soc_codec_drv_suspend;
3780 if (codec_drv->resume)
3781 codec->component.resume = snd_soc_codec_drv_resume;
3782 if (codec_drv->write)
3783 codec->component.write = snd_soc_codec_drv_write;
3784 if (codec_drv->read)
3785 codec->component.read = snd_soc_codec_drv_read;
3786 if (codec_drv->set_sysclk)
3787 codec->component.set_sysclk = snd_soc_codec_set_sysclk_;
3788 if (codec_drv->set_pll)
3789 codec->component.set_pll = snd_soc_codec_set_pll_;
3790 if (codec_drv->set_jack)
3791 codec->component.set_jack = snd_soc_codec_set_jack_;
3792 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3793
3794 dapm = snd_soc_codec_get_dapm(codec);
3795 dapm->idle_bias_off = codec_drv->idle_bias_off;
3796 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3797 if (codec_drv->seq_notifier)
3798 dapm->seq_notifier = codec_drv->seq_notifier;
3799 if (codec_drv->set_bias_level)
3800 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3801 codec->dev = dev;
3802 codec->driver = codec_drv;
3803 codec->component.val_bytes = codec_drv->reg_word_size;
3804
3805#ifdef CONFIG_DEBUG_FS
3806 codec->component.init_debugfs = soc_init_codec_debugfs;
3807 codec->component.debugfs_prefix = "codec";
3808#endif
3809
3810 if (codec_drv->get_regmap)
3811 codec->component.regmap = codec_drv->get_regmap(dev);
3812
3813 for (i = 0; i < num_dai; i++) {
3814 convert_endianness_formats(&dai_drv[i].playback);
3815 convert_endianness_formats(&dai_drv[i].capture);
3816 }
3817
3818 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3819 if (ret < 0) {
3820 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3821 goto err_cleanup;
3822 }
3823
3824 list_for_each_entry(dai, &codec->component.dai_list, list)
3825 dai->codec = codec;
3826
3827 mutex_lock(&client_mutex);
3828 snd_soc_component_add_unlocked(&codec->component);
3829 list_add(&codec->list, &codec_list);
3830 mutex_unlock(&client_mutex);
3831
3832 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3833 codec->component.name);
3834 return 0;
3835
3836err_cleanup:
3837 snd_soc_component_cleanup(&codec->component);
3838err_free:
3839 kfree(codec);
3840 return ret;
3841}
3842EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3843
3844/**
3845 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3846 *
3847 * @dev: codec to unregister
3848 */
3849void snd_soc_unregister_codec(struct device *dev)
3850{
3851 struct snd_soc_codec *codec;
3852
3853 mutex_lock(&client_mutex);
3854 list_for_each_entry(codec, &codec_list, list) {
3855 if (dev == codec->dev)
3856 goto found;
3857 }
3858 mutex_unlock(&client_mutex);
3859 return;
3860
3861found:
3862 list_del(&codec->list);
3863 snd_soc_component_del_unlocked(&codec->component);
3864 mutex_unlock(&client_mutex);
3865
3866 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3867 codec->component.name);
3868
3869 snd_soc_component_cleanup(&codec->component);
3870 snd_soc_cache_exit(codec);
3871 kfree(codec);
3872}
3873EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3874
3875/* Retrieve a card's name from device tree */
3876int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3877 const char *propname)
3878{
3879 struct device_node *np;
3880 int ret;
3881
3882 if (!card->dev) {
3883 pr_err("card->dev is not set before calling %s\n", __func__);
3884 return -EINVAL;
3885 }
3886
3887 np = card->dev->of_node;
3888
3889 ret = of_property_read_string_index(np, propname, 0, &card->name);
3890 /*
3891 * EINVAL means the property does not exist. This is fine providing
3892 * card->name was previously set, which is checked later in
3893 * snd_soc_register_card.
3894 */
3895 if (ret < 0 && ret != -EINVAL) {
3896 dev_err(card->dev,
3897 "ASoC: Property '%s' could not be read: %d\n",
3898 propname, ret);
3899 return ret;
3900 }
3901
3902 return 0;
3903}
3904EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3905
3906static const struct snd_soc_dapm_widget simple_widgets[] = {
3907 SND_SOC_DAPM_MIC("Microphone", NULL),
3908 SND_SOC_DAPM_LINE("Line", NULL),
3909 SND_SOC_DAPM_HP("Headphone", NULL),
3910 SND_SOC_DAPM_SPK("Speaker", NULL),
3911};
3912
3913int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3914 const char *propname)
3915{
3916 struct device_node *np = card->dev->of_node;
3917 struct snd_soc_dapm_widget *widgets;
3918 const char *template, *wname;
3919 int i, j, num_widgets, ret;
3920
3921 num_widgets = of_property_count_strings(np, propname);
3922 if (num_widgets < 0) {
3923 dev_err(card->dev,
3924 "ASoC: Property '%s' does not exist\n", propname);
3925 return -EINVAL;
3926 }
3927 if (num_widgets & 1) {
3928 dev_err(card->dev,
3929 "ASoC: Property '%s' length is not even\n", propname);
3930 return -EINVAL;
3931 }
3932
3933 num_widgets /= 2;
3934 if (!num_widgets) {
3935 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3936 propname);
3937 return -EINVAL;
3938 }
3939
3940 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3941 GFP_KERNEL);
3942 if (!widgets) {
3943 dev_err(card->dev,
3944 "ASoC: Could not allocate memory for widgets\n");
3945 return -ENOMEM;
3946 }
3947
3948 for (i = 0; i < num_widgets; i++) {
3949 ret = of_property_read_string_index(np, propname,
3950 2 * i, &template);
3951 if (ret) {
3952 dev_err(card->dev,
3953 "ASoC: Property '%s' index %d read error:%d\n",
3954 propname, 2 * i, ret);
3955 return -EINVAL;
3956 }
3957
3958 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3959 if (!strncmp(template, simple_widgets[j].name,
3960 strlen(simple_widgets[j].name))) {
3961 widgets[i] = simple_widgets[j];
3962 break;
3963 }
3964 }
3965
3966 if (j >= ARRAY_SIZE(simple_widgets)) {
3967 dev_err(card->dev,
3968 "ASoC: DAPM widget '%s' is not supported\n",
3969 template);
3970 return -EINVAL;
3971 }
3972
3973 ret = of_property_read_string_index(np, propname,
3974 (2 * i) + 1,
3975 &wname);
3976 if (ret) {
3977 dev_err(card->dev,
3978 "ASoC: Property '%s' index %d read error:%d\n",
3979 propname, (2 * i) + 1, ret);
3980 return -EINVAL;
3981 }
3982
3983 widgets[i].name = wname;
3984 }
3985
3986 card->of_dapm_widgets = widgets;
3987 card->num_of_dapm_widgets = num_widgets;
3988
3989 return 0;
3990}
3991EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3992
3993static int snd_soc_of_get_slot_mask(struct device_node *np,
3994 const char *prop_name,
3995 unsigned int *mask)
3996{
3997 u32 val;
3998 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3999 int i;
4000
4001 if (!of_slot_mask)
4002 return 0;
4003 val /= sizeof(u32);
4004 for (i = 0; i < val; i++)
4005 if (be32_to_cpup(&of_slot_mask[i]))
4006 *mask |= (1 << i);
4007
4008 return val;
4009}
4010
4011int snd_soc_of_parse_tdm_slot(struct device_node *np,
4012 unsigned int *tx_mask,
4013 unsigned int *rx_mask,
4014 unsigned int *slots,
4015 unsigned int *slot_width)
4016{
4017 u32 val;
4018 int ret;
4019
4020 if (tx_mask)
4021 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
4022 if (rx_mask)
4023 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
4024
4025 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
4026 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
4027 if (ret)
4028 return ret;
4029
4030 if (slots)
4031 *slots = val;
4032 }
4033
4034 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
4035 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
4036 if (ret)
4037 return ret;
4038
4039 if (slot_width)
4040 *slot_width = val;
4041 }
4042
4043 return 0;
4044}
4045EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
4046
4047void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
4048 struct snd_soc_codec_conf *codec_conf,
4049 struct device_node *of_node,
4050 const char *propname)
4051{
4052 struct device_node *np = card->dev->of_node;
4053 const char *str;
4054 int ret;
4055
4056 ret = of_property_read_string(np, propname, &str);
4057 if (ret < 0) {
4058 /* no prefix is not error */
4059 return;
4060 }
4061
4062 codec_conf->of_node = of_node;
4063 codec_conf->name_prefix = str;
4064}
4065EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
4066
4067int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4068 const char *propname)
4069{
4070 struct device_node *np = card->dev->of_node;
4071 int num_routes;
4072 struct snd_soc_dapm_route *routes;
4073 int i, ret;
4074
4075 num_routes = of_property_count_strings(np, propname);
4076 if (num_routes < 0 || num_routes & 1) {
4077 dev_err(card->dev,
4078 "ASoC: Property '%s' does not exist or its length is not even\n",
4079 propname);
4080 return -EINVAL;
4081 }
4082 num_routes /= 2;
4083 if (!num_routes) {
4084 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4085 propname);
4086 return -EINVAL;
4087 }
4088
4089 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4090 GFP_KERNEL);
4091 if (!routes) {
4092 dev_err(card->dev,
4093 "ASoC: Could not allocate DAPM route table\n");
4094 return -EINVAL;
4095 }
4096
4097 for (i = 0; i < num_routes; i++) {
4098 ret = of_property_read_string_index(np, propname,
4099 2 * i, &routes[i].sink);
4100 if (ret) {
4101 dev_err(card->dev,
4102 "ASoC: Property '%s' index %d could not be read: %d\n",
4103 propname, 2 * i, ret);
4104 return -EINVAL;
4105 }
4106 ret = of_property_read_string_index(np, propname,
4107 (2 * i) + 1, &routes[i].source);
4108 if (ret) {
4109 dev_err(card->dev,
4110 "ASoC: Property '%s' index %d could not be read: %d\n",
4111 propname, (2 * i) + 1, ret);
4112 return -EINVAL;
4113 }
4114 }
4115
4116 card->num_of_dapm_routes = num_routes;
4117 card->of_dapm_routes = routes;
4118
4119 return 0;
4120}
4121EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4122
4123unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4124 const char *prefix,
4125 struct device_node **bitclkmaster,
4126 struct device_node **framemaster)
4127{
4128 int ret, i;
4129 char prop[128];
4130 unsigned int format = 0;
4131 int bit, frame;
4132 const char *str;
4133 struct {
4134 char *name;
4135 unsigned int val;
4136 } of_fmt_table[] = {
4137 { "i2s", SND_SOC_DAIFMT_I2S },
4138 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
4139 { "left_j", SND_SOC_DAIFMT_LEFT_J },
4140 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
4141 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
4142 { "ac97", SND_SOC_DAIFMT_AC97 },
4143 { "pdm", SND_SOC_DAIFMT_PDM},
4144 { "msb", SND_SOC_DAIFMT_MSB },
4145 { "lsb", SND_SOC_DAIFMT_LSB },
4146 };
4147
4148 if (!prefix)
4149 prefix = "";
4150
4151 /*
4152 * check "dai-format = xxx"
4153 * or "[prefix]format = xxx"
4154 * SND_SOC_DAIFMT_FORMAT_MASK area
4155 */
4156 ret = of_property_read_string(np, "dai-format", &str);
4157 if (ret < 0) {
4158 snprintf(prop, sizeof(prop), "%sformat", prefix);
4159 ret = of_property_read_string(np, prop, &str);
4160 }
4161 if (ret == 0) {
4162 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4163 if (strcmp(str, of_fmt_table[i].name) == 0) {
4164 format |= of_fmt_table[i].val;
4165 break;
4166 }
4167 }
4168 }
4169
4170 /*
4171 * check "[prefix]continuous-clock"
4172 * SND_SOC_DAIFMT_CLOCK_MASK area
4173 */
4174 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4175 if (of_property_read_bool(np, prop))
4176 format |= SND_SOC_DAIFMT_CONT;
4177 else
4178 format |= SND_SOC_DAIFMT_GATED;
4179
4180 /*
4181 * check "[prefix]bitclock-inversion"
4182 * check "[prefix]frame-inversion"
4183 * SND_SOC_DAIFMT_INV_MASK area
4184 */
4185 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4186 bit = !!of_get_property(np, prop, NULL);
4187
4188 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4189 frame = !!of_get_property(np, prop, NULL);
4190
4191 switch ((bit << 4) + frame) {
4192 case 0x11:
4193 format |= SND_SOC_DAIFMT_IB_IF;
4194 break;
4195 case 0x10:
4196 format |= SND_SOC_DAIFMT_IB_NF;
4197 break;
4198 case 0x01:
4199 format |= SND_SOC_DAIFMT_NB_IF;
4200 break;
4201 default:
4202 /* SND_SOC_DAIFMT_NB_NF is default */
4203 break;
4204 }
4205
4206 /*
4207 * check "[prefix]bitclock-master"
4208 * check "[prefix]frame-master"
4209 * SND_SOC_DAIFMT_MASTER_MASK area
4210 */
4211 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4212 bit = !!of_get_property(np, prop, NULL);
4213 if (bit && bitclkmaster)
4214 *bitclkmaster = of_parse_phandle(np, prop, 0);
4215
4216 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4217 frame = !!of_get_property(np, prop, NULL);
4218 if (frame && framemaster)
4219 *framemaster = of_parse_phandle(np, prop, 0);
4220
4221 switch ((bit << 4) + frame) {
4222 case 0x11:
4223 format |= SND_SOC_DAIFMT_CBM_CFM;
4224 break;
4225 case 0x10:
4226 format |= SND_SOC_DAIFMT_CBM_CFS;
4227 break;
4228 case 0x01:
4229 format |= SND_SOC_DAIFMT_CBS_CFM;
4230 break;
4231 default:
4232 format |= SND_SOC_DAIFMT_CBS_CFS;
4233 break;
4234 }
4235
4236 return format;
4237}
4238EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4239
4240int snd_soc_get_dai_id(struct device_node *ep)
4241{
4242 struct snd_soc_component *pos;
4243 struct device_node *node;
4244 int ret;
4245
4246 node = of_graph_get_port_parent(ep);
4247
4248 /*
4249 * For example HDMI case, HDMI has video/sound port,
4250 * but ALSA SoC needs sound port number only.
4251 * Thus counting HDMI DT port/endpoint doesn't work.
4252 * Then, it should have .of_xlate_dai_id
4253 */
4254 ret = -ENOTSUPP;
4255 mutex_lock(&client_mutex);
4256 list_for_each_entry(pos, &component_list, list) {
4257 struct device_node *component_of_node = pos->dev->of_node;
4258
4259 if (!component_of_node && pos->dev->parent)
4260 component_of_node = pos->dev->parent->of_node;
4261
4262 if (component_of_node != node)
4263 continue;
4264
4265 if (pos->driver->of_xlate_dai_id)
4266 ret = pos->driver->of_xlate_dai_id(pos, ep);
4267
4268 break;
4269 }
4270 mutex_unlock(&client_mutex);
4271
4272 of_node_put(node);
4273
4274 return ret;
4275}
4276EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
4277
4278int snd_soc_get_dai_name(struct of_phandle_args *args,
4279 const char **dai_name)
4280{
4281 struct snd_soc_component *pos;
4282 struct device_node *component_of_node;
4283 int ret = -EPROBE_DEFER;
4284
4285 mutex_lock(&client_mutex);
4286 list_for_each_entry(pos, &component_list, list) {
4287 component_of_node = pos->dev->of_node;
4288 if (!component_of_node && pos->dev->parent)
4289 component_of_node = pos->dev->parent->of_node;
4290
4291 if (component_of_node != args->np)
4292 continue;
4293
4294 if (pos->driver->of_xlate_dai_name) {
4295 ret = pos->driver->of_xlate_dai_name(pos,
4296 args,
4297 dai_name);
4298 } else {
4299 struct snd_soc_dai *dai;
4300 int id = -1;
4301
4302 switch (args->args_count) {
4303 case 0:
4304 id = 0; /* same as dai_drv[0] */
4305 break;
4306 case 1:
4307 id = args->args[0];
4308 break;
4309 default:
4310 /* not supported */
4311 break;
4312 }
4313
4314 if (id < 0 || id >= pos->num_dai) {
4315 ret = -EINVAL;
4316 continue;
4317 }
4318
4319 ret = 0;
4320
4321 /* find target DAI */
4322 list_for_each_entry(dai, &pos->dai_list, list) {
4323 if (id == 0)
4324 break;
4325 id--;
4326 }
4327
4328 *dai_name = dai->driver->name;
4329 if (!*dai_name)
4330 *dai_name = pos->name;
4331 }
4332
4333 break;
4334 }
4335 mutex_unlock(&client_mutex);
4336 return ret;
4337}
4338EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
4339
4340int snd_soc_of_get_dai_name(struct device_node *of_node,
4341 const char **dai_name)
4342{
4343 struct of_phandle_args args;
4344 int ret;
4345
4346 ret = of_parse_phandle_with_args(of_node, "sound-dai",
4347 "#sound-dai-cells", 0, &args);
4348 if (ret)
4349 return ret;
4350
4351 ret = snd_soc_get_dai_name(&args, dai_name);
4352
4353 of_node_put(args.np);
4354
4355 return ret;
4356}
4357EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4358
4359/*
4360 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
4361 * @dai_link: DAI link
4362 *
4363 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
4364 */
4365void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
4366{
4367 struct snd_soc_dai_link_component *component = dai_link->codecs;
4368 int index;
4369
4370 for (index = 0; index < dai_link->num_codecs; index++, component++) {
4371 if (!component->of_node)
4372 break;
4373 of_node_put(component->of_node);
4374 component->of_node = NULL;
4375 }
4376}
4377EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
4378
4379/*
4380 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
4381 * @dev: Card device
4382 * @of_node: Device node
4383 * @dai_link: DAI link
4384 *
4385 * Builds an array of CODEC DAI components from the DAI link property
4386 * 'sound-dai'.
4387 * The array is set in the DAI link and the number of DAIs is set accordingly.
4388 * The device nodes in the array (of_node) must be dereferenced by calling
4389 * snd_soc_of_put_dai_link_codecs() on @dai_link.
4390 *
4391 * Returns 0 for success
4392 */
4393int snd_soc_of_get_dai_link_codecs(struct device *dev,
4394 struct device_node *of_node,
4395 struct snd_soc_dai_link *dai_link)
4396{
4397 struct of_phandle_args args;
4398 struct snd_soc_dai_link_component *component;
4399 char *name;
4400 int index, num_codecs, ret;
4401
4402 /* Count the number of CODECs */
4403 name = "sound-dai";
4404 num_codecs = of_count_phandle_with_args(of_node, name,
4405 "#sound-dai-cells");
4406 if (num_codecs <= 0) {
4407 if (num_codecs == -ENOENT)
4408 dev_err(dev, "No 'sound-dai' property\n");
4409 else
4410 dev_err(dev, "Bad phandle in 'sound-dai'\n");
4411 return num_codecs;
4412 }
4413 component = devm_kzalloc(dev,
4414 sizeof *component * num_codecs,
4415 GFP_KERNEL);
4416 if (!component)
4417 return -ENOMEM;
4418 dai_link->codecs = component;
4419 dai_link->num_codecs = num_codecs;
4420
4421 /* Parse the list */
4422 for (index = 0, component = dai_link->codecs;
4423 index < dai_link->num_codecs;
4424 index++, component++) {
4425 ret = of_parse_phandle_with_args(of_node, name,
4426 "#sound-dai-cells",
4427 index, &args);
4428 if (ret)
4429 goto err;
4430 component->of_node = args.np;
4431 ret = snd_soc_get_dai_name(&args, &component->dai_name);
4432 if (ret < 0)
4433 goto err;
4434 }
4435 return 0;
4436err:
4437 snd_soc_of_put_dai_link_codecs(dai_link);
4438 dai_link->codecs = NULL;
4439 dai_link->num_codecs = 0;
4440 return ret;
4441}
4442EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4443
4444static int __init snd_soc_init(void)
4445{
4446 snd_soc_debugfs_init();
4447 snd_soc_util_init();
4448
4449 return platform_driver_register(&soc_driver);
4450}
4451module_init(snd_soc_init);
4452
4453static void __exit snd_soc_exit(void)
4454{
4455 snd_soc_util_exit();
4456 snd_soc_debugfs_exit();
4457
4458 platform_driver_unregister(&soc_driver);
4459}
4460module_exit(snd_soc_exit);
4461
4462/* Module information */
4463MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4464MODULE_DESCRIPTION("ALSA SoC Core");
4465MODULE_LICENSE("GPL");
4466MODULE_ALIAS("platform:soc-audio");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-core.c -- ALSA SoC Audio Layer
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Author: Liam Girdwood <lrg@slimlogic.co.uk>
11// with code, comments and ideas from :-
12// Richard Purdie <richard@openedhand.com>
13//
14// TODO:
15// o Add hw rules to enforce rates, etc.
16// o More testing with other codecs/machines.
17// o Add more codecs and platforms to ensure good API coverage.
18// o Support TDM on PCM and I2S
19
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/pm.h>
25#include <linux/bitops.h>
26#include <linux/debugfs.h>
27#include <linux/platform_device.h>
28#include <linux/pinctrl/consumer.h>
29#include <linux/ctype.h>
30#include <linux/slab.h>
31#include <linux/of.h>
32#include <linux/of_graph.h>
33#include <linux/dmi.h>
34#include <linux/acpi.h>
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/soc-dpcm.h>
40#include <sound/soc-topology.h>
41#include <sound/soc-link.h>
42#include <sound/initval.h>
43
44#define CREATE_TRACE_POINTS
45#include <trace/events/asoc.h>
46
47static DEFINE_MUTEX(client_mutex);
48static LIST_HEAD(component_list);
49static LIST_HEAD(unbind_card_list);
50
51#define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
53
54/*
55 * This is used if driver don't need to have CPU/Codec/Platform
56 * dai_link. see soc.h
57 */
58struct snd_soc_dai_link_component null_dailink_component[0];
59EXPORT_SYMBOL_GPL(null_dailink_component);
60
61/*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66static int pmdown_time = 5000;
67module_param(pmdown_time, int, 0);
68MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
72{
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
74
75 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
76}
77
78static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
81{
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
83 int ret;
84
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
86 if (ret)
87 return ret;
88
89 return count;
90}
91
92static DEVICE_ATTR_RW(pmdown_time);
93
94static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
96 NULL
97};
98
99static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
101{
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
104
105 if (!rtd)
106 return 0;
107
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
111}
112
113static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
116};
117
118static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
121};
122
123static const struct attribute_group *soc_dev_attr_groups[] = {
124 &soc_dapm_dev_group,
125 &soc_dev_group,
126 NULL
127};
128
129#ifdef CONFIG_DEBUG_FS
130struct dentry *snd_soc_debugfs_root;
131EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
132
133static void soc_init_component_debugfs(struct snd_soc_component *component)
134{
135 if (!component->card->debugfs_card_root)
136 return;
137
138 if (component->debugfs_prefix) {
139 char *name;
140
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
143 if (name) {
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
146 kfree(name);
147 }
148 } else {
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
151 }
152
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
155}
156
157static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
158{
159 if (!component->debugfs_root)
160 return;
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
163}
164
165static int dai_list_show(struct seq_file *m, void *v)
166{
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
169
170 mutex_lock(&client_mutex);
171
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
175
176 mutex_unlock(&client_mutex);
177
178 return 0;
179}
180DEFINE_SHOW_ATTRIBUTE(dai_list);
181
182static int component_list_show(struct seq_file *m, void *v)
183{
184 struct snd_soc_component *component;
185
186 mutex_lock(&client_mutex);
187
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
190
191 mutex_unlock(&client_mutex);
192
193 return 0;
194}
195DEFINE_SHOW_ATTRIBUTE(component_list);
196
197static void soc_init_card_debugfs(struct snd_soc_card *card)
198{
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
201
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
203 &card->pop_time);
204
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
206}
207
208static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
209{
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
212}
213
214static void snd_soc_debugfs_init(void)
215{
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
217
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
219 &dai_list_fops);
220
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
223}
224
225static void snd_soc_debugfs_exit(void)
226{
227 debugfs_remove_recursive(snd_soc_debugfs_root);
228}
229
230#else
231
232static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236static inline void snd_soc_debugfs_init(void) { }
237static inline void snd_soc_debugfs_exit(void) { }
238
239#endif
240
241static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
242 const struct of_phandle_args *args2)
243{
244 if (!args1 || !args2)
245 return 0;
246
247 if (args1->np != args2->np)
248 return 0;
249
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
252 return 0;
253
254 return 1;
255}
256
257static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
258{
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
260}
261
262static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
263{
264 return (dlc->name && dlc->of_node);
265}
266
267static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
268{
269 return !(dlc->dai_args || dlc->dai_name);
270}
271
272static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
274{
275 if (!dlc)
276 return 0;
277
278 if (dlc->dai_args)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
280
281 if (!dlc->dai_name)
282 return 1;
283
284 /* see snd_soc_dai_name_get() */
285
286 if (dai->driver->name &&
287 strcmp(dlc->dai_name, dai->driver->name) == 0)
288 return 1;
289
290 if (strcmp(dlc->dai_name, dai->name) == 0)
291 return 1;
292
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
295 return 1;
296
297 return 0;
298}
299
300const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
301{
302 /* see snd_soc_is_matching_dai() */
303 if (dai->driver->name)
304 return dai->driver->name;
305
306 if (dai->name)
307 return dai->name;
308
309 if (dai->component->name)
310 return dai->component->name;
311
312 return NULL;
313}
314EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
315
316static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
318{
319 struct snd_soc_component *comp;
320 int i;
321
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
325 return 0;
326 }
327
328 /* see for_each_rtd_components */
329 rtd->components[rtd->num_components] = component;
330 rtd->num_components++;
331
332 return 0;
333}
334
335struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
337{
338 struct snd_soc_component *component;
339 int i;
340
341 if (!driver_name)
342 return NULL;
343
344 /*
345 * NOTE
346 *
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
351 */
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
354
355 if (!component_name)
356 continue;
357
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
360 return component;
361 }
362
363 return NULL;
364}
365EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
366
367struct snd_soc_component
368*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
369{
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
372
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
376 (!driver_name ||
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
380 break;
381 }
382 }
383
384 return found_component;
385}
386EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
387
388struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
390{
391 struct snd_soc_component *component;
392
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
396
397 return component;
398}
399EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
400
401struct snd_soc_pcm_runtime
402*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
404{
405 struct snd_soc_pcm_runtime *rtd;
406
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
409 return rtd;
410 }
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
412 return NULL;
413}
414EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
415
416/*
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
420 */
421void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
422{
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
425
426 snd_soc_dpcm_mutex_lock(rtd);
427
428 dev_dbg(rtd->dev,
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
434
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
437 rtd->pop_wait = 0;
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
440 }
441
442 snd_soc_dpcm_mutex_unlock(rtd);
443}
444EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
445
446static void soc_release_rtd_dev(struct device *dev)
447{
448 /* "dev" means "rtd->dev" */
449 kfree(dev);
450}
451
452static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
453{
454 if (!rtd)
455 return;
456
457 list_del(&rtd->list);
458
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
462
463 /*
464 * we don't need to call kfree() for rtd->dev
465 * see
466 * soc_release_rtd_dev()
467 *
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
470 * see
471 * soc_new_pcm_runtime()
472 *
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
475 * see
476 * soc_new_pcm_runtime()
477 *
478 * rtd = devm_kzalloc(dev, ...);
479 * rtd->dev = dev
480 */
481 device_unregister(rtd->dev);
482}
483
484static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
487 delayed_work.work);
488
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
491}
492
493static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
495{
496 struct snd_soc_pcm_runtime *rtd;
497 struct snd_soc_component *component;
498 struct device *dev;
499 int ret;
500 int stream;
501
502 /*
503 * for rtd->dev
504 */
505 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
506 if (!dev)
507 return NULL;
508
509 dev->parent = card->dev;
510 dev->release = soc_release_rtd_dev;
511
512 dev_set_name(dev, "%s", dai_link->name);
513
514 ret = device_register(dev);
515 if (ret < 0) {
516 put_device(dev); /* soc_release_rtd_dev */
517 return NULL;
518 }
519
520 /*
521 * for rtd
522 */
523 rtd = devm_kzalloc(dev,
524 sizeof(*rtd) +
525 sizeof(component) * (dai_link->num_cpus +
526 dai_link->num_codecs +
527 dai_link->num_platforms),
528 GFP_KERNEL);
529 if (!rtd) {
530 device_unregister(dev);
531 return NULL;
532 }
533
534 rtd->dev = dev;
535 INIT_LIST_HEAD(&rtd->list);
536 for_each_pcm_streams(stream) {
537 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
538 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
539 }
540 dev_set_drvdata(dev, rtd);
541 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
542
543 /*
544 * for rtd->dais
545 */
546 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
547 sizeof(struct snd_soc_dai *),
548 GFP_KERNEL);
549 if (!rtd->dais)
550 goto free_rtd;
551
552 /*
553 * dais = [][][][][][][][][][][][][][][][][][]
554 * ^cpu_dais ^codec_dais
555 * |--- num_cpus ---|--- num_codecs --|
556 * see
557 * snd_soc_rtd_to_cpu()
558 * snd_soc_rtd_to_codec()
559 */
560 rtd->card = card;
561 rtd->dai_link = dai_link;
562 rtd->num = card->num_rtd++;
563 rtd->pmdown_time = pmdown_time; /* default power off timeout */
564
565 /* see for_each_card_rtds */
566 list_add_tail(&rtd->list, &card->rtd_list);
567
568 ret = device_add_groups(dev, soc_dev_attr_groups);
569 if (ret < 0)
570 goto free_rtd;
571
572 return rtd;
573
574free_rtd:
575 soc_free_pcm_runtime(rtd);
576 return NULL;
577}
578
579static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
580{
581 struct snd_soc_dai_link *dai_link;
582 int i;
583
584 /*
585 * COMP_DUMMY() creates size 0 array on dai_link.
586 * Fill it as dummy DAI in case of CPU/Codec here.
587 * Do nothing for Platform.
588 */
589 for_each_card_prelinks(card, i, dai_link) {
590 if (dai_link->num_cpus == 0 && dai_link->cpus) {
591 dai_link->num_cpus = 1;
592 dai_link->cpus = &snd_soc_dummy_dlc;
593 }
594 if (dai_link->num_codecs == 0 && dai_link->codecs) {
595 dai_link->num_codecs = 1;
596 dai_link->codecs = &snd_soc_dummy_dlc;
597 }
598 }
599}
600
601static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
602{
603 struct snd_soc_pcm_runtime *rtd;
604
605 for_each_card_rtds(card, rtd)
606 flush_delayed_work(&rtd->delayed_work);
607}
608
609#ifdef CONFIG_PM_SLEEP
610static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
611{
612 struct snd_soc_pcm_runtime *rtd;
613 struct snd_soc_dai *dai;
614 int playback = SNDRV_PCM_STREAM_PLAYBACK;
615 int i;
616
617 for_each_card_rtds(card, rtd) {
618
619 if (rtd->dai_link->ignore_suspend)
620 continue;
621
622 for_each_rtd_dais(rtd, i, dai) {
623 if (snd_soc_dai_stream_active(dai, playback))
624 snd_soc_dai_digital_mute(dai, mute, playback);
625 }
626 }
627}
628
629static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
630{
631 struct snd_soc_pcm_runtime *rtd;
632 int stream;
633
634 for_each_card_rtds(card, rtd) {
635
636 if (rtd->dai_link->ignore_suspend)
637 continue;
638
639 for_each_pcm_streams(stream)
640 snd_soc_dapm_stream_event(rtd, stream, event);
641 }
642}
643
644/* powers down audio subsystem for suspend */
645int snd_soc_suspend(struct device *dev)
646{
647 struct snd_soc_card *card = dev_get_drvdata(dev);
648 struct snd_soc_component *component;
649 struct snd_soc_pcm_runtime *rtd;
650 int i;
651
652 /* If the card is not initialized yet there is nothing to do */
653 if (!snd_soc_card_is_instantiated(card))
654 return 0;
655
656 /*
657 * Due to the resume being scheduled into a workqueue we could
658 * suspend before that's finished - wait for it to complete.
659 */
660 snd_power_wait(card->snd_card);
661
662 /* we're going to block userspace touching us until resume completes */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
664
665 /* mute any active DACs */
666 soc_playback_digital_mute(card, 1);
667
668 /* suspend all pcms */
669 for_each_card_rtds(card, rtd) {
670 if (rtd->dai_link->ignore_suspend)
671 continue;
672
673 snd_pcm_suspend_all(rtd->pcm);
674 }
675
676 snd_soc_card_suspend_pre(card);
677
678 /* close any waiting streams */
679 snd_soc_flush_all_delayed_work(card);
680
681 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
682
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card);
685 snd_soc_dapm_sync(&card->dapm);
686
687 /* suspend all COMPONENTs */
688 for_each_card_rtds(card, rtd) {
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 for_each_rtd_components(rtd, i, component) {
694 struct snd_soc_dapm_context *dapm =
695 snd_soc_component_get_dapm(component);
696
697 /*
698 * ignore if component was already suspended
699 */
700 if (snd_soc_component_is_suspended(component))
701 continue;
702
703 /*
704 * If there are paths active then the COMPONENT will be
705 * held with bias _ON and should not be suspended.
706 */
707 switch (snd_soc_dapm_get_bias_level(dapm)) {
708 case SND_SOC_BIAS_STANDBY:
709 /*
710 * If the COMPONENT is capable of idle
711 * bias off then being in STANDBY
712 * means it's doing something,
713 * otherwise fall through.
714 */
715 if (dapm->idle_bias_off) {
716 dev_dbg(component->dev,
717 "ASoC: idle_bias_off CODEC on over suspend\n");
718 break;
719 }
720 fallthrough;
721
722 case SND_SOC_BIAS_OFF:
723 snd_soc_component_suspend(component);
724 if (component->regmap)
725 regcache_mark_dirty(component->regmap);
726 /* deactivate pins to sleep state */
727 pinctrl_pm_select_sleep_state(component->dev);
728 break;
729 default:
730 dev_dbg(component->dev,
731 "ASoC: COMPONENT is on over suspend\n");
732 break;
733 }
734 }
735 }
736
737 snd_soc_card_suspend_post(card);
738
739 return 0;
740}
741EXPORT_SYMBOL_GPL(snd_soc_suspend);
742
743/*
744 * deferred resume work, so resume can complete before we finished
745 * setting our codec back up, which can be very slow on I2C
746 */
747static void soc_resume_deferred(struct work_struct *work)
748{
749 struct snd_soc_card *card =
750 container_of(work, struct snd_soc_card,
751 deferred_resume_work);
752 struct snd_soc_component *component;
753
754 /*
755 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
756 * so userspace apps are blocked from touching us
757 */
758
759 dev_dbg(card->dev, "ASoC: starting resume work\n");
760
761 /* Bring us up into D2 so that DAPM starts enabling things */
762 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
763
764 snd_soc_card_resume_pre(card);
765
766 for_each_card_components(card, component) {
767 if (snd_soc_component_is_suspended(component))
768 snd_soc_component_resume(component);
769 }
770
771 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
772
773 /* unmute any active DACs */
774 soc_playback_digital_mute(card, 0);
775
776 snd_soc_card_resume_post(card);
777
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
779
780 /* Recheck all endpoints too, their state is affected by suspend */
781 dapm_mark_endpoints_dirty(card);
782 snd_soc_dapm_sync(&card->dapm);
783
784 /* userspace can access us now we are back as we were before */
785 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
786}
787
788/* powers up audio subsystem after a suspend */
789int snd_soc_resume(struct device *dev)
790{
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 struct snd_soc_component *component;
793
794 /* If the card is not initialized yet there is nothing to do */
795 if (!snd_soc_card_is_instantiated(card))
796 return 0;
797
798 /* activate pins from sleep state */
799 for_each_card_components(card, component)
800 if (snd_soc_component_active(component))
801 pinctrl_pm_select_default_state(component->dev);
802
803 dev_dbg(dev, "ASoC: Scheduling resume work\n");
804 if (!schedule_work(&card->deferred_resume_work))
805 dev_err(dev, "ASoC: resume work item may be lost\n");
806
807 return 0;
808}
809EXPORT_SYMBOL_GPL(snd_soc_resume);
810
811static void soc_resume_init(struct snd_soc_card *card)
812{
813 /* deferred resume work */
814 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
815}
816#else
817#define snd_soc_suspend NULL
818#define snd_soc_resume NULL
819static inline void soc_resume_init(struct snd_soc_card *card) { }
820#endif
821
822static struct device_node
823*soc_component_to_node(struct snd_soc_component *component)
824{
825 struct device_node *of_node;
826
827 of_node = component->dev->of_node;
828 if (!of_node && component->dev->parent)
829 of_node = component->dev->parent->of_node;
830
831 return of_node;
832}
833
834struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
835 const struct of_phandle_args *args)
836{
837 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
838
839 if (!ret)
840 return NULL;
841
842 *ret = *args;
843
844 return ret;
845}
846EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
847
848static int snd_soc_is_matching_component(
849 const struct snd_soc_dai_link_component *dlc,
850 struct snd_soc_component *component)
851{
852 struct device_node *component_of_node;
853
854 if (!dlc)
855 return 0;
856
857 if (dlc->dai_args) {
858 struct snd_soc_dai *dai;
859
860 for_each_component_dais(component, dai)
861 if (snd_soc_is_matching_dai(dlc, dai))
862 return 1;
863 return 0;
864 }
865
866 component_of_node = soc_component_to_node(component);
867
868 if (dlc->of_node && component_of_node != dlc->of_node)
869 return 0;
870 if (dlc->name && strcmp(component->name, dlc->name))
871 return 0;
872
873 return 1;
874}
875
876static struct snd_soc_component *soc_find_component(
877 const struct snd_soc_dai_link_component *dlc)
878{
879 struct snd_soc_component *component;
880
881 lockdep_assert_held(&client_mutex);
882
883 /*
884 * NOTE
885 *
886 * It returns *1st* found component, but some driver
887 * has few components by same of_node/name
888 * ex)
889 * CPU component and generic DMAEngine component
890 */
891 for_each_component(component)
892 if (snd_soc_is_matching_component(dlc, component))
893 return component;
894
895 return NULL;
896}
897
898/**
899 * snd_soc_find_dai - Find a registered DAI
900 *
901 * @dlc: name of the DAI or the DAI driver and optional component info to match
902 *
903 * This function will search all registered components and their DAIs to
904 * find the DAI of the same name. The component's of_node and name
905 * should also match if being specified.
906 *
907 * Return: pointer of DAI, or NULL if not found.
908 */
909struct snd_soc_dai *snd_soc_find_dai(
910 const struct snd_soc_dai_link_component *dlc)
911{
912 struct snd_soc_component *component;
913 struct snd_soc_dai *dai;
914
915 lockdep_assert_held(&client_mutex);
916
917 /* Find CPU DAI from registered DAIs */
918 for_each_component(component)
919 if (snd_soc_is_matching_component(dlc, component))
920 for_each_component_dais(component, dai)
921 if (snd_soc_is_matching_dai(dlc, dai))
922 return dai;
923
924 return NULL;
925}
926EXPORT_SYMBOL_GPL(snd_soc_find_dai);
927
928struct snd_soc_dai *snd_soc_find_dai_with_mutex(
929 const struct snd_soc_dai_link_component *dlc)
930{
931 struct snd_soc_dai *dai;
932
933 mutex_lock(&client_mutex);
934 dai = snd_soc_find_dai(dlc);
935 mutex_unlock(&client_mutex);
936
937 return dai;
938}
939EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
940
941static int soc_dai_link_sanity_check(struct snd_soc_card *card,
942 struct snd_soc_dai_link *link)
943{
944 int i;
945 struct snd_soc_dai_link_component *dlc;
946
947 /* Codec check */
948 for_each_link_codecs(link, i, dlc) {
949 /*
950 * Codec must be specified by 1 of name or OF node,
951 * not both or neither.
952 */
953 if (snd_soc_dlc_component_is_invalid(dlc))
954 goto component_invalid;
955
956 if (snd_soc_dlc_component_is_empty(dlc))
957 goto component_empty;
958
959 /* Codec DAI name must be specified */
960 if (snd_soc_dlc_dai_is_empty(dlc))
961 goto dai_empty;
962
963 /*
964 * Defer card registration if codec component is not added to
965 * component list.
966 */
967 if (!soc_find_component(dlc))
968 goto component_not_found;
969 }
970
971 /* Platform check */
972 for_each_link_platforms(link, i, dlc) {
973 /*
974 * Platform may be specified by either name or OF node, but it
975 * can be left unspecified, then no components will be inserted
976 * in the rtdcom list
977 */
978 if (snd_soc_dlc_component_is_invalid(dlc))
979 goto component_invalid;
980
981 if (snd_soc_dlc_component_is_empty(dlc))
982 goto component_empty;
983
984 /*
985 * Defer card registration if platform component is not added to
986 * component list.
987 */
988 if (!soc_find_component(dlc))
989 goto component_not_found;
990 }
991
992 /* CPU check */
993 for_each_link_cpus(link, i, dlc) {
994 /*
995 * CPU device may be specified by either name or OF node, but
996 * can be left unspecified, and will be matched based on DAI
997 * name alone..
998 */
999 if (snd_soc_dlc_component_is_invalid(dlc))
1000 goto component_invalid;
1001
1002
1003 if (snd_soc_dlc_component_is_empty(dlc)) {
1004 /*
1005 * At least one of CPU DAI name or CPU device name/node must be specified
1006 */
1007 if (snd_soc_dlc_dai_is_empty(dlc))
1008 goto component_dai_empty;
1009 } else {
1010 /*
1011 * Defer card registration if Component is not added
1012 */
1013 if (!soc_find_component(dlc))
1014 goto component_not_found;
1015 }
1016 }
1017
1018 return 0;
1019
1020component_invalid:
1021 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1022 return -EINVAL;
1023
1024component_empty:
1025 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1026 return -EINVAL;
1027
1028component_not_found:
1029 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1030 return -EPROBE_DEFER;
1031
1032dai_empty:
1033 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1034 return -EINVAL;
1035
1036component_dai_empty:
1037 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1038 return -EINVAL;
1039}
1040
1041#define MAX_DEFAULT_CH_MAP_SIZE 8
1042static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = {
1043 { .cpu = 0, .codec = 0 },
1044 { .cpu = 1, .codec = 1 },
1045 { .cpu = 2, .codec = 2 },
1046 { .cpu = 3, .codec = 3 },
1047 { .cpu = 4, .codec = 4 },
1048 { .cpu = 5, .codec = 5 },
1049 { .cpu = 6, .codec = 6 },
1050 { .cpu = 7, .codec = 7 },
1051};
1052static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = {
1053 { .cpu = 0, .codec = 0 },
1054 { .cpu = 0, .codec = 1 },
1055 { .cpu = 0, .codec = 2 },
1056 { .cpu = 0, .codec = 3 },
1057 { .cpu = 0, .codec = 4 },
1058 { .cpu = 0, .codec = 5 },
1059 { .cpu = 0, .codec = 6 },
1060 { .cpu = 0, .codec = 7 },
1061};
1062static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = {
1063 { .cpu = 0, .codec = 0 },
1064 { .cpu = 1, .codec = 0 },
1065 { .cpu = 2, .codec = 0 },
1066 { .cpu = 3, .codec = 0 },
1067 { .cpu = 4, .codec = 0 },
1068 { .cpu = 5, .codec = 0 },
1069 { .cpu = 6, .codec = 0 },
1070 { .cpu = 7, .codec = 0 },
1071};
1072static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1073 struct snd_soc_dai_link *dai_link)
1074{
1075 struct snd_soc_dai_link_ch_map *ch_maps;
1076 int i;
1077
1078 /*
1079 * dai_link->ch_maps indicates how CPU/Codec are connected.
1080 * It will be a map seen from a larger number of DAI.
1081 * see
1082 * soc.h :: [dai_link->ch_maps Image sample]
1083 */
1084
1085 /* it should have ch_maps if connection was N:M */
1086 if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 &&
1087 dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) {
1088 dev_err(card->dev, "need to have ch_maps when N:M connection (%s)",
1089 dai_link->name);
1090 return -EINVAL;
1091 }
1092
1093 /* do nothing if it has own maps */
1094 if (dai_link->ch_maps)
1095 goto sanity_check;
1096
1097 /* check default map size */
1098 if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE ||
1099 dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) {
1100 dev_err(card->dev, "soc-core.c needs update default_connection_maps");
1101 return -EINVAL;
1102 }
1103
1104 /* Compensate missing map for ... */
1105 if (dai_link->num_cpus == dai_link->num_codecs)
1106 dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */
1107 else if (dai_link->num_cpus < dai_link->num_codecs)
1108 dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */
1109 else
1110 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
1111
1112sanity_check:
1113 dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name);
1114 for_each_link_ch_maps(dai_link, i, ch_maps) {
1115 if ((ch_maps->cpu >= dai_link->num_cpus) ||
1116 (ch_maps->codec >= dai_link->num_codecs)) {
1117 dev_err(card->dev,
1118 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1119 i,
1120 ch_maps->cpu, dai_link->num_cpus,
1121 ch_maps->codec, dai_link->num_codecs);
1122 return -EINVAL;
1123 }
1124
1125 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1126 i, ch_maps->cpu, ch_maps->codec);
1127 }
1128
1129 return 0;
1130}
1131
1132/**
1133 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1134 * @card: The ASoC card to which the pcm_runtime has
1135 * @rtd: The pcm_runtime to remove
1136 *
1137 * This function removes a pcm_runtime from the ASoC card.
1138 */
1139void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1140 struct snd_soc_pcm_runtime *rtd)
1141{
1142 lockdep_assert_held(&client_mutex);
1143
1144 /*
1145 * Notify the machine driver for extra destruction
1146 */
1147 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1148
1149 soc_free_pcm_runtime(rtd);
1150}
1151EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1152
1153/**
1154 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1155 * @card: The ASoC card to which the pcm_runtime is added
1156 * @dai_link: The DAI link to find pcm_runtime
1157 *
1158 * This function adds a pcm_runtime ASoC card by using dai_link.
1159 *
1160 * Note: Topology can use this API to add pcm_runtime when probing the
1161 * topology component. And machine drivers can still define static
1162 * DAI links in dai_link array.
1163 */
1164static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1165 struct snd_soc_dai_link *dai_link)
1166{
1167 struct snd_soc_pcm_runtime *rtd;
1168 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1169 struct snd_soc_component *component;
1170 int i, ret;
1171
1172 lockdep_assert_held(&client_mutex);
1173
1174 /*
1175 * Notify the machine driver for extra initialization
1176 */
1177 ret = snd_soc_card_add_dai_link(card, dai_link);
1178 if (ret < 0)
1179 return ret;
1180
1181 if (dai_link->ignore)
1182 return 0;
1183
1184 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1185
1186 ret = soc_dai_link_sanity_check(card, dai_link);
1187 if (ret < 0)
1188 return ret;
1189
1190 rtd = soc_new_pcm_runtime(card, dai_link);
1191 if (!rtd)
1192 return -ENOMEM;
1193
1194 for_each_link_cpus(dai_link, i, cpu) {
1195 snd_soc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1196 if (!snd_soc_rtd_to_cpu(rtd, i)) {
1197 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1198 cpu->dai_name);
1199 goto _err_defer;
1200 }
1201 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
1202 }
1203
1204 /* Find CODEC from registered CODECs */
1205 for_each_link_codecs(dai_link, i, codec) {
1206 snd_soc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1207 if (!snd_soc_rtd_to_codec(rtd, i)) {
1208 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1209 codec->dai_name);
1210 goto _err_defer;
1211 }
1212
1213 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
1214 }
1215
1216 /* Find PLATFORM from registered PLATFORMs */
1217 for_each_link_platforms(dai_link, i, platform) {
1218 for_each_component(component) {
1219 if (!snd_soc_is_matching_component(platform, component))
1220 continue;
1221
1222 if (snd_soc_component_is_dummy(component) && component->num_dai)
1223 continue;
1224
1225 snd_soc_rtd_add_component(rtd, component);
1226 }
1227 }
1228
1229 return 0;
1230
1231_err_defer:
1232 snd_soc_remove_pcm_runtime(card, rtd);
1233 return -EPROBE_DEFER;
1234}
1235
1236int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1237 struct snd_soc_dai_link *dai_link,
1238 int num_dai_link)
1239{
1240 for (int i = 0; i < num_dai_link; i++) {
1241 int ret;
1242
1243 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1244 if (ret < 0)
1245 return ret;
1246
1247 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1248 if (ret < 0)
1249 return ret;
1250 }
1251
1252 return 0;
1253}
1254EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1255
1256static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1257{
1258 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1259 struct snd_soc_dai *dai, *not_used;
1260 u64 pos, possible_fmt;
1261 unsigned int mask = 0, dai_fmt = 0;
1262 int i, j, priority, pri, until;
1263
1264 /*
1265 * Get selectable format from each DAIs.
1266 *
1267 ****************************
1268 * NOTE
1269 * Using .auto_selectable_formats is not mandatory,
1270 * we can select format manually from Sound Card.
1271 * When use it, driver should list well tested format only.
1272 ****************************
1273 *
1274 * ex)
1275 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1276 * (A) (B) (C)
1277 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1278 * DAI1 : { 0xF000, 0x0F00 };
1279 * (X) (Y)
1280 *
1281 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1282 * Here is dev_dbg() message and comments
1283 *
1284 * priority = 1
1285 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1286 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1287 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1288 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1289 * priority = 2
1290 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1291 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1292 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1293 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1294 * priority = 3
1295 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1296 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1297 * found auto selected format: 0000000000000F00
1298 */
1299 until = snd_soc_dai_get_fmt_max_priority(rtd);
1300 for (priority = 1; priority <= until; priority++) {
1301 for_each_rtd_dais(rtd, j, not_used) {
1302
1303 possible_fmt = ULLONG_MAX;
1304 for_each_rtd_dais(rtd, i, dai) {
1305 u64 fmt = 0;
1306
1307 pri = (j >= i) ? priority : priority - 1;
1308 fmt = snd_soc_dai_get_fmt(dai, pri);
1309 possible_fmt &= fmt;
1310 }
1311 if (possible_fmt)
1312 goto found;
1313 }
1314 }
1315 /* Not Found */
1316 return;
1317found:
1318 /*
1319 * convert POSSIBLE_DAIFMT to DAIFMT
1320 *
1321 * Some basic/default settings on each is defined as 0.
1322 * see
1323 * SND_SOC_DAIFMT_NB_NF
1324 * SND_SOC_DAIFMT_GATED
1325 *
1326 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1327 * these value, and will be overwrite to auto selected value.
1328 *
1329 * To avoid such issue, loop from 63 to 0 here.
1330 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1331 * Basic/Default settings of each part and above are defined
1332 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1333 */
1334 for (i = 63; i >= 0; i--) {
1335 pos = 1ULL << i;
1336 switch (possible_fmt & pos) {
1337 /*
1338 * for format
1339 */
1340 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1341 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1342 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1343 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1344 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1345 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1346 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1347 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1348 break;
1349 /*
1350 * for clock
1351 */
1352 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1353 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1354 break;
1355 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1356 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1357 break;
1358 /*
1359 * for clock invert
1360 */
1361 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1362 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1363 break;
1364 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1365 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1366 break;
1367 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1368 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1369 break;
1370 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1371 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1372 break;
1373 /*
1374 * for clock provider / consumer
1375 */
1376 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1377 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1378 break;
1379 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1380 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1381 break;
1382 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1383 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1384 break;
1385 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1386 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1387 break;
1388 }
1389 }
1390
1391 /*
1392 * Some driver might have very complex limitation.
1393 * In such case, user want to auto-select non-limitation part,
1394 * and want to manually specify complex part.
1395 *
1396 * Or for example, if both CPU and Codec can be clock provider,
1397 * but because of its quality, user want to specify it manually.
1398 *
1399 * Use manually specified settings if sound card did.
1400 */
1401 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1402 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1403 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1404 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1405 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1406 mask |= SND_SOC_DAIFMT_INV_MASK;
1407 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1408 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1409
1410 dai_link->dai_fmt |= (dai_fmt & mask);
1411}
1412
1413/**
1414 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1415 * @rtd: The runtime for which the DAI link format should be changed
1416 * @dai_fmt: The new DAI link format
1417 *
1418 * This function updates the DAI link format for all DAIs connected to the DAI
1419 * link for the specified runtime.
1420 *
1421 * Note: For setups with a static format set the dai_fmt field in the
1422 * corresponding snd_dai_link struct instead of using this function.
1423 *
1424 * Returns 0 on success, otherwise a negative error code.
1425 */
1426int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1427 unsigned int dai_fmt)
1428{
1429 struct snd_soc_dai *cpu_dai;
1430 struct snd_soc_dai *codec_dai;
1431 unsigned int i;
1432 int ret;
1433
1434 if (!dai_fmt)
1435 return 0;
1436
1437 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1438 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1439 if (ret != 0 && ret != -ENOTSUPP)
1440 return ret;
1441 }
1442
1443 /* Flip the polarity for the "CPU" end of link */
1444 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1445
1446 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1447 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1448 if (ret != 0 && ret != -ENOTSUPP)
1449 return ret;
1450 }
1451
1452 return 0;
1453}
1454EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1455
1456static int soc_init_pcm_runtime(struct snd_soc_card *card,
1457 struct snd_soc_pcm_runtime *rtd)
1458{
1459 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1460 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1461 struct snd_soc_component *component;
1462 int ret, num, i;
1463
1464 /* do machine specific initialization */
1465 ret = snd_soc_link_init(rtd);
1466 if (ret < 0)
1467 return ret;
1468
1469 snd_soc_runtime_get_dai_fmt(rtd);
1470 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1471 if (ret)
1472 goto err;
1473
1474 /* add DPCM sysfs entries */
1475 soc_dpcm_debugfs_add(rtd);
1476
1477 num = rtd->num;
1478
1479 /*
1480 * most drivers will register their PCMs using DAI link ordering but
1481 * topology based drivers can use the DAI link id field to set PCM
1482 * device number and then use rtd + a base offset of the BEs.
1483 */
1484 for_each_rtd_components(rtd, i, component) {
1485 if (!component->driver->use_dai_pcm_id)
1486 continue;
1487
1488 if (rtd->dai_link->no_pcm)
1489 num += component->driver->be_pcm_base;
1490 else
1491 num = rtd->dai_link->id;
1492 }
1493
1494 /* create compress_device if possible */
1495 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1496 if (ret != -ENOTSUPP)
1497 goto err;
1498
1499 /* create the pcm */
1500 ret = soc_new_pcm(rtd, num);
1501 if (ret < 0) {
1502 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1503 dai_link->stream_name, ret);
1504 goto err;
1505 }
1506
1507 ret = snd_soc_pcm_dai_new(rtd);
1508 if (ret < 0)
1509 goto err;
1510
1511 rtd->initialized = true;
1512
1513 return 0;
1514err:
1515 snd_soc_link_exit(rtd);
1516 return ret;
1517}
1518
1519static void soc_set_name_prefix(struct snd_soc_card *card,
1520 struct snd_soc_component *component)
1521{
1522 struct device_node *of_node = soc_component_to_node(component);
1523 const char *str;
1524 int ret, i;
1525
1526 for (i = 0; i < card->num_configs; i++) {
1527 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1528
1529 if (snd_soc_is_matching_component(&map->dlc, component) &&
1530 map->name_prefix) {
1531 component->name_prefix = map->name_prefix;
1532 return;
1533 }
1534 }
1535
1536 /*
1537 * If there is no configuration table or no match in the table,
1538 * check if a prefix is provided in the node
1539 */
1540 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1541 if (ret < 0)
1542 return;
1543
1544 component->name_prefix = str;
1545}
1546
1547static void soc_remove_component(struct snd_soc_component *component,
1548 int probed)
1549{
1550
1551 if (!component->card)
1552 return;
1553
1554 if (probed)
1555 snd_soc_component_remove(component);
1556
1557 list_del_init(&component->card_list);
1558 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1559 soc_cleanup_component_debugfs(component);
1560 component->card = NULL;
1561 snd_soc_component_module_put_when_remove(component);
1562}
1563
1564static int soc_probe_component(struct snd_soc_card *card,
1565 struct snd_soc_component *component)
1566{
1567 struct snd_soc_dapm_context *dapm =
1568 snd_soc_component_get_dapm(component);
1569 struct snd_soc_dai *dai;
1570 int probed = 0;
1571 int ret;
1572
1573 if (snd_soc_component_is_dummy(component))
1574 return 0;
1575
1576 if (component->card) {
1577 if (component->card != card) {
1578 dev_err(component->dev,
1579 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1580 component->name, card->name, component->card->name);
1581 return -ENODEV;
1582 }
1583 return 0;
1584 }
1585
1586 ret = snd_soc_component_module_get_when_probe(component);
1587 if (ret < 0)
1588 return ret;
1589
1590 component->card = card;
1591 soc_set_name_prefix(card, component);
1592
1593 soc_init_component_debugfs(component);
1594
1595 snd_soc_dapm_init(dapm, card, component);
1596
1597 ret = snd_soc_dapm_new_controls(dapm,
1598 component->driver->dapm_widgets,
1599 component->driver->num_dapm_widgets);
1600
1601 if (ret != 0) {
1602 dev_err(component->dev,
1603 "Failed to create new controls %d\n", ret);
1604 goto err_probe;
1605 }
1606
1607 for_each_component_dais(component, dai) {
1608 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1609 if (ret != 0) {
1610 dev_err(component->dev,
1611 "Failed to create DAI widgets %d\n", ret);
1612 goto err_probe;
1613 }
1614 }
1615
1616 ret = snd_soc_component_probe(component);
1617 if (ret < 0)
1618 goto err_probe;
1619
1620 WARN(dapm->idle_bias_off &&
1621 dapm->bias_level != SND_SOC_BIAS_OFF,
1622 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1623 component->name);
1624 probed = 1;
1625
1626 /*
1627 * machine specific init
1628 * see
1629 * snd_soc_component_set_aux()
1630 */
1631 ret = snd_soc_component_init(component);
1632 if (ret < 0)
1633 goto err_probe;
1634
1635 ret = snd_soc_add_component_controls(component,
1636 component->driver->controls,
1637 component->driver->num_controls);
1638 if (ret < 0)
1639 goto err_probe;
1640
1641 ret = snd_soc_dapm_add_routes(dapm,
1642 component->driver->dapm_routes,
1643 component->driver->num_dapm_routes);
1644 if (ret < 0) {
1645 if (card->disable_route_checks) {
1646 dev_info(card->dev,
1647 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1648 __func__);
1649 } else {
1650 dev_err(card->dev,
1651 "%s: snd_soc_dapm_add_routes failed: %d\n",
1652 __func__, ret);
1653 goto err_probe;
1654 }
1655 }
1656
1657 /* see for_each_card_components */
1658 list_add(&component->card_list, &card->component_dev_list);
1659
1660err_probe:
1661 if (ret < 0)
1662 soc_remove_component(component, probed);
1663
1664 return ret;
1665}
1666
1667static void soc_remove_link_dais(struct snd_soc_card *card)
1668{
1669 struct snd_soc_pcm_runtime *rtd;
1670 int order;
1671
1672 for_each_comp_order(order) {
1673 for_each_card_rtds(card, rtd) {
1674 /* remove all rtd connected DAIs in good order */
1675 snd_soc_pcm_dai_remove(rtd, order);
1676 }
1677 }
1678}
1679
1680static int soc_probe_link_dais(struct snd_soc_card *card)
1681{
1682 struct snd_soc_pcm_runtime *rtd;
1683 int order, ret;
1684
1685 for_each_comp_order(order) {
1686 for_each_card_rtds(card, rtd) {
1687 /* probe all rtd connected DAIs in good order */
1688 ret = snd_soc_pcm_dai_probe(rtd, order);
1689 if (ret)
1690 return ret;
1691 }
1692 }
1693
1694 return 0;
1695}
1696
1697static void soc_remove_link_components(struct snd_soc_card *card)
1698{
1699 struct snd_soc_component *component;
1700 struct snd_soc_pcm_runtime *rtd;
1701 int i, order;
1702
1703 for_each_comp_order(order) {
1704 for_each_card_rtds(card, rtd) {
1705 for_each_rtd_components(rtd, i, component) {
1706 if (component->driver->remove_order != order)
1707 continue;
1708
1709 soc_remove_component(component, 1);
1710 }
1711 }
1712 }
1713}
1714
1715static int soc_probe_link_components(struct snd_soc_card *card)
1716{
1717 struct snd_soc_component *component;
1718 struct snd_soc_pcm_runtime *rtd;
1719 int i, ret, order;
1720
1721 for_each_comp_order(order) {
1722 for_each_card_rtds(card, rtd) {
1723 for_each_rtd_components(rtd, i, component) {
1724 if (component->driver->probe_order != order)
1725 continue;
1726
1727 ret = soc_probe_component(card, component);
1728 if (ret < 0)
1729 return ret;
1730 }
1731 }
1732 }
1733
1734 return 0;
1735}
1736
1737static void soc_unbind_aux_dev(struct snd_soc_card *card)
1738{
1739 struct snd_soc_component *component, *_component;
1740
1741 for_each_card_auxs_safe(card, component, _component) {
1742 /* for snd_soc_component_init() */
1743 snd_soc_component_set_aux(component, NULL);
1744 list_del(&component->card_aux_list);
1745 }
1746}
1747
1748static int soc_bind_aux_dev(struct snd_soc_card *card)
1749{
1750 struct snd_soc_component *component;
1751 struct snd_soc_aux_dev *aux;
1752 int i;
1753
1754 for_each_card_pre_auxs(card, i, aux) {
1755 /* codecs, usually analog devices */
1756 component = soc_find_component(&aux->dlc);
1757 if (!component)
1758 return -EPROBE_DEFER;
1759
1760 /* for snd_soc_component_init() */
1761 snd_soc_component_set_aux(component, aux);
1762 /* see for_each_card_auxs */
1763 list_add(&component->card_aux_list, &card->aux_comp_list);
1764 }
1765 return 0;
1766}
1767
1768static int soc_probe_aux_devices(struct snd_soc_card *card)
1769{
1770 struct snd_soc_component *component;
1771 int order;
1772 int ret;
1773
1774 for_each_comp_order(order) {
1775 for_each_card_auxs(card, component) {
1776 if (component->driver->probe_order != order)
1777 continue;
1778
1779 ret = soc_probe_component(card, component);
1780 if (ret < 0)
1781 return ret;
1782 }
1783 }
1784
1785 return 0;
1786}
1787
1788static void soc_remove_aux_devices(struct snd_soc_card *card)
1789{
1790 struct snd_soc_component *comp, *_comp;
1791 int order;
1792
1793 for_each_comp_order(order) {
1794 for_each_card_auxs_safe(card, comp, _comp) {
1795 if (comp->driver->remove_order == order)
1796 soc_remove_component(comp, 1);
1797 }
1798 }
1799}
1800
1801#ifdef CONFIG_DMI
1802/*
1803 * If a DMI filed contain strings in this blacklist (e.g.
1804 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1805 * as invalid and dropped when setting the card long name from DMI info.
1806 */
1807static const char * const dmi_blacklist[] = {
1808 "To be filled by OEM",
1809 "TBD by OEM",
1810 "Default String",
1811 "Board Manufacturer",
1812 "Board Vendor Name",
1813 "Board Product Name",
1814 NULL, /* terminator */
1815};
1816
1817/*
1818 * Trim special characters, and replace '-' with '_' since '-' is used to
1819 * separate different DMI fields in the card long name. Only number and
1820 * alphabet characters and a few separator characters are kept.
1821 */
1822static void cleanup_dmi_name(char *name)
1823{
1824 int i, j = 0;
1825
1826 for (i = 0; name[i]; i++) {
1827 if (isalnum(name[i]) || (name[i] == '.')
1828 || (name[i] == '_'))
1829 name[j++] = name[i];
1830 else if (name[i] == '-')
1831 name[j++] = '_';
1832 }
1833
1834 name[j] = '\0';
1835}
1836
1837/*
1838 * Check if a DMI field is valid, i.e. not containing any string
1839 * in the black list.
1840 */
1841static int is_dmi_valid(const char *field)
1842{
1843 int i = 0;
1844
1845 while (dmi_blacklist[i]) {
1846 if (strstr(field, dmi_blacklist[i]))
1847 return 0;
1848 i++;
1849 }
1850
1851 return 1;
1852}
1853
1854/*
1855 * Append a string to card->dmi_longname with character cleanups.
1856 */
1857static void append_dmi_string(struct snd_soc_card *card, const char *str)
1858{
1859 char *dst = card->dmi_longname;
1860 size_t dst_len = sizeof(card->dmi_longname);
1861 size_t len;
1862
1863 len = strlen(dst);
1864 snprintf(dst + len, dst_len - len, "-%s", str);
1865
1866 len++; /* skip the separator "-" */
1867 if (len < dst_len)
1868 cleanup_dmi_name(dst + len);
1869}
1870
1871/**
1872 * snd_soc_set_dmi_name() - Register DMI names to card
1873 * @card: The card to register DMI names
1874 * @flavour: The flavour "differentiator" for the card amongst its peers.
1875 *
1876 * An Intel machine driver may be used by many different devices but are
1877 * difficult for userspace to differentiate, since machine drivers usually
1878 * use their own name as the card short name and leave the card long name
1879 * blank. To differentiate such devices and fix bugs due to lack of
1880 * device-specific configurations, this function allows DMI info to be used
1881 * as the sound card long name, in the format of
1882 * "vendor-product-version-board"
1883 * (Character '-' is used to separate different DMI fields here).
1884 * This will help the user space to load the device-specific Use Case Manager
1885 * (UCM) configurations for the card.
1886 *
1887 * Possible card long names may be:
1888 * DellInc.-XPS139343-01-0310JH
1889 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1890 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1891 *
1892 * This function also supports flavoring the card longname to provide
1893 * the extra differentiation, like "vendor-product-version-board-flavor".
1894 *
1895 * We only keep number and alphabet characters and a few separator characters
1896 * in the card long name since UCM in the user space uses the card long names
1897 * as card configuration directory names and AudoConf cannot support special
1898 * characters like SPACE.
1899 *
1900 * Returns 0 on success, otherwise a negative error code.
1901 */
1902int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1903{
1904 const char *vendor, *product, *board;
1905
1906 if (card->long_name)
1907 return 0; /* long name already set by driver or from DMI */
1908
1909 if (!dmi_available)
1910 return 0;
1911
1912 /* make up dmi long name as: vendor-product-version-board */
1913 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1914 if (!vendor || !is_dmi_valid(vendor)) {
1915 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1916 return 0;
1917 }
1918
1919 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1920 cleanup_dmi_name(card->dmi_longname);
1921
1922 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1923 if (product && is_dmi_valid(product)) {
1924 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1925
1926 append_dmi_string(card, product);
1927
1928 /*
1929 * some vendors like Lenovo may only put a self-explanatory
1930 * name in the product version field
1931 */
1932 if (product_version && is_dmi_valid(product_version))
1933 append_dmi_string(card, product_version);
1934 }
1935
1936 board = dmi_get_system_info(DMI_BOARD_NAME);
1937 if (board && is_dmi_valid(board)) {
1938 if (!product || strcasecmp(board, product))
1939 append_dmi_string(card, board);
1940 } else if (!product) {
1941 /* fall back to using legacy name */
1942 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1943 return 0;
1944 }
1945
1946 /* Add flavour to dmi long name */
1947 if (flavour)
1948 append_dmi_string(card, flavour);
1949
1950 /* set the card long name */
1951 card->long_name = card->dmi_longname;
1952
1953 return 0;
1954}
1955EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1956#endif /* CONFIG_DMI */
1957
1958static void soc_check_tplg_fes(struct snd_soc_card *card)
1959{
1960 struct snd_soc_component *component;
1961 const struct snd_soc_component_driver *comp_drv;
1962 struct snd_soc_dai_link *dai_link;
1963 int i;
1964
1965 for_each_component(component) {
1966
1967 /* does this component override BEs ? */
1968 if (!component->driver->ignore_machine)
1969 continue;
1970
1971 /* for this machine ? */
1972 if (!strcmp(component->driver->ignore_machine,
1973 card->dev->driver->name))
1974 goto match;
1975 if (strcmp(component->driver->ignore_machine,
1976 dev_name(card->dev)))
1977 continue;
1978match:
1979 /* machine matches, so override the rtd data */
1980 for_each_card_prelinks(card, i, dai_link) {
1981
1982 /* ignore this FE */
1983 if (dai_link->dynamic) {
1984 dai_link->ignore = true;
1985 continue;
1986 }
1987
1988 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1989 card->dai_link[i].name);
1990
1991 /* override platform component */
1992 if (!dai_link->platforms) {
1993 dev_err(card->dev, "init platform error");
1994 continue;
1995 }
1996
1997 if (component->dev->of_node)
1998 dai_link->platforms->of_node = component->dev->of_node;
1999 else
2000 dai_link->platforms->name = component->name;
2001
2002 /* convert non BE into BE */
2003 if (!dai_link->no_pcm) {
2004 dai_link->no_pcm = 1;
2005
2006 if (dai_link->dpcm_playback)
2007 dev_warn(card->dev,
2008 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2009 dai_link->name);
2010 if (dai_link->dpcm_capture)
2011 dev_warn(card->dev,
2012 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
2013 dai_link->name);
2014
2015 /* convert normal link into DPCM one */
2016 if (!(dai_link->dpcm_playback ||
2017 dai_link->dpcm_capture)) {
2018 dai_link->dpcm_playback = !dai_link->capture_only;
2019 dai_link->dpcm_capture = !dai_link->playback_only;
2020 }
2021 }
2022
2023 /*
2024 * override any BE fixups
2025 * see
2026 * snd_soc_link_be_hw_params_fixup()
2027 */
2028 dai_link->be_hw_params_fixup =
2029 component->driver->be_hw_params_fixup;
2030
2031 /*
2032 * most BE links don't set stream name, so set it to
2033 * dai link name if it's NULL to help bind widgets.
2034 */
2035 if (!dai_link->stream_name)
2036 dai_link->stream_name = dai_link->name;
2037 }
2038
2039 /* Inform userspace we are using alternate topology */
2040 if (component->driver->topology_name_prefix) {
2041
2042 /* topology shortname created? */
2043 if (!card->topology_shortname_created) {
2044 comp_drv = component->driver;
2045
2046 snprintf(card->topology_shortname, 32, "%s-%s",
2047 comp_drv->topology_name_prefix,
2048 card->name);
2049 card->topology_shortname_created = true;
2050 }
2051
2052 /* use topology shortname */
2053 card->name = card->topology_shortname;
2054 }
2055 }
2056}
2057
2058#define soc_setup_card_name(card, name, name1, name2) \
2059 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2060static void __soc_setup_card_name(struct snd_soc_card *card,
2061 char *name, int len,
2062 const char *name1, const char *name2)
2063{
2064 const char *src = name1 ? name1 : name2;
2065 int i;
2066
2067 snprintf(name, len, "%s", src);
2068
2069 if (name != card->snd_card->driver)
2070 return;
2071
2072 /*
2073 * Name normalization (driver field)
2074 *
2075 * The driver name is somewhat special, as it's used as a key for
2076 * searches in the user-space.
2077 *
2078 * ex)
2079 * "abcd??efg" -> "abcd__efg"
2080 */
2081 for (i = 0; i < len; i++) {
2082 switch (name[i]) {
2083 case '_':
2084 case '-':
2085 case '\0':
2086 break;
2087 default:
2088 if (!isalnum(name[i]))
2089 name[i] = '_';
2090 break;
2091 }
2092 }
2093
2094 /*
2095 * The driver field should contain a valid string from the user view.
2096 * The wrapping usually does not work so well here. Set a smaller string
2097 * in the specific ASoC driver.
2098 */
2099 if (strlen(src) > len - 1)
2100 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2101}
2102
2103static void soc_cleanup_card_resources(struct snd_soc_card *card)
2104{
2105 struct snd_soc_pcm_runtime *rtd, *n;
2106
2107 if (card->snd_card)
2108 snd_card_disconnect_sync(card->snd_card);
2109
2110 snd_soc_dapm_shutdown(card);
2111
2112 /* release machine specific resources */
2113 for_each_card_rtds(card, rtd)
2114 if (rtd->initialized)
2115 snd_soc_link_exit(rtd);
2116 /* remove and free each DAI */
2117 soc_remove_link_dais(card);
2118 soc_remove_link_components(card);
2119
2120 for_each_card_rtds_safe(card, rtd, n)
2121 snd_soc_remove_pcm_runtime(card, rtd);
2122
2123 /* remove auxiliary devices */
2124 soc_remove_aux_devices(card);
2125 soc_unbind_aux_dev(card);
2126
2127 snd_soc_dapm_free(&card->dapm);
2128 soc_cleanup_card_debugfs(card);
2129
2130 /* remove the card */
2131 snd_soc_card_remove(card);
2132
2133 if (card->snd_card) {
2134 snd_card_free(card->snd_card);
2135 card->snd_card = NULL;
2136 }
2137}
2138
2139static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2140{
2141 if (snd_soc_card_is_instantiated(card)) {
2142 card->instantiated = false;
2143 snd_soc_flush_all_delayed_work(card);
2144
2145 soc_cleanup_card_resources(card);
2146 if (!unregister)
2147 list_add(&card->list, &unbind_card_list);
2148 } else {
2149 if (unregister)
2150 list_del(&card->list);
2151 }
2152}
2153
2154static int snd_soc_bind_card(struct snd_soc_card *card)
2155{
2156 struct snd_soc_pcm_runtime *rtd;
2157 struct snd_soc_component *component;
2158 int ret;
2159
2160 mutex_lock(&client_mutex);
2161 snd_soc_card_mutex_lock_root(card);
2162
2163 snd_soc_fill_dummy_dai(card);
2164
2165 snd_soc_dapm_init(&card->dapm, card, NULL);
2166
2167 /* check whether any platform is ignore machine FE and using topology */
2168 soc_check_tplg_fes(card);
2169
2170 /* bind aux_devs too */
2171 ret = soc_bind_aux_dev(card);
2172 if (ret < 0)
2173 goto probe_end;
2174
2175 /* add predefined DAI links to the list */
2176 card->num_rtd = 0;
2177 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2178 if (ret < 0)
2179 goto probe_end;
2180
2181 /* card bind complete so register a sound card */
2182 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2183 card->owner, 0, &card->snd_card);
2184 if (ret < 0) {
2185 dev_err(card->dev,
2186 "ASoC: can't create sound card for card %s: %d\n",
2187 card->name, ret);
2188 goto probe_end;
2189 }
2190
2191 soc_init_card_debugfs(card);
2192
2193 soc_resume_init(card);
2194
2195 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2196 card->num_dapm_widgets);
2197 if (ret < 0)
2198 goto probe_end;
2199
2200 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2201 card->num_of_dapm_widgets);
2202 if (ret < 0)
2203 goto probe_end;
2204
2205 /* initialise the sound card only once */
2206 ret = snd_soc_card_probe(card);
2207 if (ret < 0)
2208 goto probe_end;
2209
2210 /* probe all components used by DAI links on this card */
2211 ret = soc_probe_link_components(card);
2212 if (ret < 0) {
2213 if (ret != -EPROBE_DEFER) {
2214 dev_err(card->dev,
2215 "ASoC: failed to instantiate card %d\n", ret);
2216 }
2217 goto probe_end;
2218 }
2219
2220 /* probe auxiliary components */
2221 ret = soc_probe_aux_devices(card);
2222 if (ret < 0) {
2223 dev_err(card->dev,
2224 "ASoC: failed to probe aux component %d\n", ret);
2225 goto probe_end;
2226 }
2227
2228 /* probe all DAI links on this card */
2229 ret = soc_probe_link_dais(card);
2230 if (ret < 0) {
2231 dev_err(card->dev,
2232 "ASoC: failed to instantiate card %d\n", ret);
2233 goto probe_end;
2234 }
2235
2236 for_each_card_rtds(card, rtd) {
2237 ret = soc_init_pcm_runtime(card, rtd);
2238 if (ret < 0)
2239 goto probe_end;
2240 }
2241
2242 snd_soc_dapm_link_dai_widgets(card);
2243 snd_soc_dapm_connect_dai_link_widgets(card);
2244
2245 ret = snd_soc_add_card_controls(card, card->controls,
2246 card->num_controls);
2247 if (ret < 0)
2248 goto probe_end;
2249
2250 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2251 card->num_dapm_routes);
2252 if (ret < 0) {
2253 if (card->disable_route_checks) {
2254 dev_info(card->dev,
2255 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2256 __func__);
2257 } else {
2258 dev_err(card->dev,
2259 "%s: snd_soc_dapm_add_routes failed: %d\n",
2260 __func__, ret);
2261 goto probe_end;
2262 }
2263 }
2264
2265 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2266 card->num_of_dapm_routes);
2267 if (ret < 0)
2268 goto probe_end;
2269
2270 /* try to set some sane longname if DMI is available */
2271 snd_soc_set_dmi_name(card, NULL);
2272
2273 soc_setup_card_name(card, card->snd_card->shortname,
2274 card->name, NULL);
2275 soc_setup_card_name(card, card->snd_card->longname,
2276 card->long_name, card->name);
2277 soc_setup_card_name(card, card->snd_card->driver,
2278 card->driver_name, card->name);
2279
2280 if (card->components) {
2281 /* the current implementation of snd_component_add() accepts */
2282 /* multiple components in the string separated by space, */
2283 /* but the string collision (identical string) check might */
2284 /* not work correctly */
2285 ret = snd_component_add(card->snd_card, card->components);
2286 if (ret < 0) {
2287 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2288 card->name, ret);
2289 goto probe_end;
2290 }
2291 }
2292
2293 ret = snd_soc_card_late_probe(card);
2294 if (ret < 0)
2295 goto probe_end;
2296
2297 snd_soc_dapm_new_widgets(card);
2298 snd_soc_card_fixup_controls(card);
2299
2300 ret = snd_card_register(card->snd_card);
2301 if (ret < 0) {
2302 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2303 ret);
2304 goto probe_end;
2305 }
2306
2307 card->instantiated = 1;
2308 dapm_mark_endpoints_dirty(card);
2309 snd_soc_dapm_sync(&card->dapm);
2310
2311 /* deactivate pins to sleep state */
2312 for_each_card_components(card, component)
2313 if (!snd_soc_component_active(component))
2314 pinctrl_pm_select_sleep_state(component->dev);
2315
2316probe_end:
2317 if (ret < 0)
2318 soc_cleanup_card_resources(card);
2319
2320 snd_soc_card_mutex_unlock(card);
2321 mutex_unlock(&client_mutex);
2322
2323 return ret;
2324}
2325
2326/* probes a new socdev */
2327static int soc_probe(struct platform_device *pdev)
2328{
2329 struct snd_soc_card *card = platform_get_drvdata(pdev);
2330
2331 /*
2332 * no card, so machine driver should be registering card
2333 * we should not be here in that case so ret error
2334 */
2335 if (!card)
2336 return -EINVAL;
2337
2338 dev_warn(&pdev->dev,
2339 "ASoC: machine %s should use snd_soc_register_card()\n",
2340 card->name);
2341
2342 /* Bodge while we unpick instantiation */
2343 card->dev = &pdev->dev;
2344
2345 return devm_snd_soc_register_card(&pdev->dev, card);
2346}
2347
2348int snd_soc_poweroff(struct device *dev)
2349{
2350 struct snd_soc_card *card = dev_get_drvdata(dev);
2351 struct snd_soc_component *component;
2352
2353 if (!snd_soc_card_is_instantiated(card))
2354 return 0;
2355
2356 /*
2357 * Flush out pmdown_time work - we actually do want to run it
2358 * now, we're shutting down so no imminent restart.
2359 */
2360 snd_soc_flush_all_delayed_work(card);
2361
2362 snd_soc_dapm_shutdown(card);
2363
2364 /* deactivate pins to sleep state */
2365 for_each_card_components(card, component)
2366 pinctrl_pm_select_sleep_state(component->dev);
2367
2368 return 0;
2369}
2370EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2371
2372const struct dev_pm_ops snd_soc_pm_ops = {
2373 .suspend = snd_soc_suspend,
2374 .resume = snd_soc_resume,
2375 .freeze = snd_soc_suspend,
2376 .thaw = snd_soc_resume,
2377 .poweroff = snd_soc_poweroff,
2378 .restore = snd_soc_resume,
2379};
2380EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2381
2382/* ASoC platform driver */
2383static struct platform_driver soc_driver = {
2384 .driver = {
2385 .name = "soc-audio",
2386 .pm = &snd_soc_pm_ops,
2387 },
2388 .probe = soc_probe,
2389};
2390
2391/**
2392 * snd_soc_cnew - create new control
2393 * @_template: control template
2394 * @data: control private data
2395 * @long_name: control long name
2396 * @prefix: control name prefix
2397 *
2398 * Create a new mixer control from a template control.
2399 *
2400 * Returns 0 for success, else error.
2401 */
2402struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2403 void *data, const char *long_name,
2404 const char *prefix)
2405{
2406 struct snd_kcontrol_new template;
2407 struct snd_kcontrol *kcontrol;
2408 char *name = NULL;
2409
2410 memcpy(&template, _template, sizeof(template));
2411 template.index = 0;
2412
2413 if (!long_name)
2414 long_name = template.name;
2415
2416 if (prefix) {
2417 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2418 if (!name)
2419 return NULL;
2420
2421 template.name = name;
2422 } else {
2423 template.name = long_name;
2424 }
2425
2426 kcontrol = snd_ctl_new1(&template, data);
2427
2428 kfree(name);
2429
2430 return kcontrol;
2431}
2432EXPORT_SYMBOL_GPL(snd_soc_cnew);
2433
2434static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2435 const struct snd_kcontrol_new *controls, int num_controls,
2436 const char *prefix, void *data)
2437{
2438 int i;
2439
2440 for (i = 0; i < num_controls; i++) {
2441 const struct snd_kcontrol_new *control = &controls[i];
2442 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2443 control->name, prefix));
2444 if (err < 0) {
2445 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2446 control->name, err);
2447 return err;
2448 }
2449 }
2450
2451 return 0;
2452}
2453
2454/**
2455 * snd_soc_add_component_controls - Add an array of controls to a component.
2456 *
2457 * @component: Component to add controls to
2458 * @controls: Array of controls to add
2459 * @num_controls: Number of elements in the array
2460 *
2461 * Return: 0 for success, else error.
2462 */
2463int snd_soc_add_component_controls(struct snd_soc_component *component,
2464 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2465{
2466 struct snd_card *card = component->card->snd_card;
2467
2468 return snd_soc_add_controls(card, component->dev, controls,
2469 num_controls, component->name_prefix, component);
2470}
2471EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2472
2473/**
2474 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2475 * Convenience function to add a list of controls.
2476 *
2477 * @soc_card: SoC card to add controls to
2478 * @controls: array of controls to add
2479 * @num_controls: number of elements in the array
2480 *
2481 * Return 0 for success, else error.
2482 */
2483int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2484 const struct snd_kcontrol_new *controls, int num_controls)
2485{
2486 struct snd_card *card = soc_card->snd_card;
2487
2488 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2489 NULL, soc_card);
2490}
2491EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2492
2493/**
2494 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2495 * Convenience function to add a list of controls.
2496 *
2497 * @dai: DAI to add controls to
2498 * @controls: array of controls to add
2499 * @num_controls: number of elements in the array
2500 *
2501 * Return 0 for success, else error.
2502 */
2503int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2504 const struct snd_kcontrol_new *controls, int num_controls)
2505{
2506 struct snd_card *card = dai->component->card->snd_card;
2507
2508 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2509 NULL, dai);
2510}
2511EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2512
2513/**
2514 * snd_soc_register_card - Register a card with the ASoC core
2515 *
2516 * @card: Card to register
2517 *
2518 */
2519int snd_soc_register_card(struct snd_soc_card *card)
2520{
2521 if (!card->name || !card->dev)
2522 return -EINVAL;
2523
2524 dev_set_drvdata(card->dev, card);
2525
2526 INIT_LIST_HEAD(&card->widgets);
2527 INIT_LIST_HEAD(&card->paths);
2528 INIT_LIST_HEAD(&card->dapm_list);
2529 INIT_LIST_HEAD(&card->aux_comp_list);
2530 INIT_LIST_HEAD(&card->component_dev_list);
2531 INIT_LIST_HEAD(&card->list);
2532 INIT_LIST_HEAD(&card->rtd_list);
2533 INIT_LIST_HEAD(&card->dapm_dirty);
2534 INIT_LIST_HEAD(&card->dobj_list);
2535
2536 card->instantiated = 0;
2537 mutex_init(&card->mutex);
2538 mutex_init(&card->dapm_mutex);
2539 mutex_init(&card->pcm_mutex);
2540
2541 return snd_soc_bind_card(card);
2542}
2543EXPORT_SYMBOL_GPL(snd_soc_register_card);
2544
2545/**
2546 * snd_soc_unregister_card - Unregister a card with the ASoC core
2547 *
2548 * @card: Card to unregister
2549 *
2550 */
2551void snd_soc_unregister_card(struct snd_soc_card *card)
2552{
2553 mutex_lock(&client_mutex);
2554 snd_soc_unbind_card(card, true);
2555 mutex_unlock(&client_mutex);
2556 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2557}
2558EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2559
2560/*
2561 * Simplify DAI link configuration by removing ".-1" from device names
2562 * and sanitizing names.
2563 */
2564static char *fmt_single_name(struct device *dev, int *id)
2565{
2566 const char *devname = dev_name(dev);
2567 char *found, *name;
2568 unsigned int id1, id2;
2569
2570 if (devname == NULL)
2571 return NULL;
2572
2573 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2574 if (!name)
2575 return NULL;
2576
2577 /* are we a "%s.%d" name (platform and SPI components) */
2578 found = strstr(name, dev->driver->name);
2579 if (found) {
2580 /* get ID */
2581 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2582
2583 /* discard ID from name if ID == -1 */
2584 if (*id == -1)
2585 found[strlen(dev->driver->name)] = '\0';
2586 }
2587
2588 /* I2C component devices are named "bus-addr" */
2589 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2590
2591 /* create unique ID number from I2C addr and bus */
2592 *id = ((id1 & 0xffff) << 16) + id2;
2593
2594 devm_kfree(dev, name);
2595
2596 /* sanitize component name for DAI link creation */
2597 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2598 } else {
2599 *id = 0;
2600 }
2601
2602 return name;
2603}
2604
2605/*
2606 * Simplify DAI link naming for single devices with multiple DAIs by removing
2607 * any ".-1" and using the DAI name (instead of device name).
2608 */
2609static inline char *fmt_multiple_name(struct device *dev,
2610 struct snd_soc_dai_driver *dai_drv)
2611{
2612 if (dai_drv->name == NULL) {
2613 dev_err(dev,
2614 "ASoC: error - multiple DAI %s registered with no name\n",
2615 dev_name(dev));
2616 return NULL;
2617 }
2618
2619 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2620}
2621
2622void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2623{
2624 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2625 list_del(&dai->list);
2626}
2627EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2628
2629/**
2630 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2631 *
2632 * @component: The component the DAIs are registered for
2633 * @dai_drv: DAI driver to use for the DAI
2634 * @legacy_dai_naming: if %true, use legacy single-name format;
2635 * if %false, use multiple-name format;
2636 *
2637 * Topology can use this API to register DAIs when probing a component.
2638 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2639 * will be freed in the component cleanup.
2640 */
2641struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2642 struct snd_soc_dai_driver *dai_drv,
2643 bool legacy_dai_naming)
2644{
2645 struct device *dev = component->dev;
2646 struct snd_soc_dai *dai;
2647
2648 lockdep_assert_held(&client_mutex);
2649
2650 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2651 if (dai == NULL)
2652 return NULL;
2653
2654 /*
2655 * Back in the old days when we still had component-less DAIs,
2656 * instead of having a static name, component-less DAIs would
2657 * inherit the name of the parent device so it is possible to
2658 * register multiple instances of the DAI. We still need to keep
2659 * the same naming style even though those DAIs are not
2660 * component-less anymore.
2661 */
2662 if (legacy_dai_naming &&
2663 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2664 dai->name = fmt_single_name(dev, &dai->id);
2665 } else {
2666 dai->name = fmt_multiple_name(dev, dai_drv);
2667 if (dai_drv->id)
2668 dai->id = dai_drv->id;
2669 else
2670 dai->id = component->num_dai;
2671 }
2672 if (!dai->name)
2673 return NULL;
2674
2675 dai->component = component;
2676 dai->dev = dev;
2677 dai->driver = dai_drv;
2678
2679 /* see for_each_component_dais */
2680 list_add_tail(&dai->list, &component->dai_list);
2681 component->num_dai++;
2682
2683 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2684 return dai;
2685}
2686EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2687
2688/**
2689 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2690 *
2691 * @component: The component for which the DAIs should be unregistered
2692 */
2693static void snd_soc_unregister_dais(struct snd_soc_component *component)
2694{
2695 struct snd_soc_dai *dai, *_dai;
2696
2697 for_each_component_dais_safe(component, dai, _dai)
2698 snd_soc_unregister_dai(dai);
2699}
2700
2701/**
2702 * snd_soc_register_dais - Register a DAI with the ASoC core
2703 *
2704 * @component: The component the DAIs are registered for
2705 * @dai_drv: DAI driver to use for the DAIs
2706 * @count: Number of DAIs
2707 */
2708static int snd_soc_register_dais(struct snd_soc_component *component,
2709 struct snd_soc_dai_driver *dai_drv,
2710 size_t count)
2711{
2712 struct snd_soc_dai *dai;
2713 unsigned int i;
2714 int ret;
2715
2716 for (i = 0; i < count; i++) {
2717 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2718 component->driver->legacy_dai_naming);
2719 if (dai == NULL) {
2720 ret = -ENOMEM;
2721 goto err;
2722 }
2723 }
2724
2725 return 0;
2726
2727err:
2728 snd_soc_unregister_dais(component);
2729
2730 return ret;
2731}
2732
2733#define ENDIANNESS_MAP(name) \
2734 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2735static u64 endianness_format_map[] = {
2736 ENDIANNESS_MAP(S16_),
2737 ENDIANNESS_MAP(U16_),
2738 ENDIANNESS_MAP(S24_),
2739 ENDIANNESS_MAP(U24_),
2740 ENDIANNESS_MAP(S32_),
2741 ENDIANNESS_MAP(U32_),
2742 ENDIANNESS_MAP(S24_3),
2743 ENDIANNESS_MAP(U24_3),
2744 ENDIANNESS_MAP(S20_3),
2745 ENDIANNESS_MAP(U20_3),
2746 ENDIANNESS_MAP(S18_3),
2747 ENDIANNESS_MAP(U18_3),
2748 ENDIANNESS_MAP(FLOAT_),
2749 ENDIANNESS_MAP(FLOAT64_),
2750 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2751};
2752
2753/*
2754 * Fix up the DAI formats for endianness: codecs don't actually see
2755 * the endianness of the data but we're using the CPU format
2756 * definitions which do need to include endianness so we ensure that
2757 * codec DAIs always have both big and little endian variants set.
2758 */
2759static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2760{
2761 int i;
2762
2763 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2764 if (stream->formats & endianness_format_map[i])
2765 stream->formats |= endianness_format_map[i];
2766}
2767
2768static void snd_soc_try_rebind_card(void)
2769{
2770 struct snd_soc_card *card, *c;
2771
2772 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2773 if (!snd_soc_bind_card(card))
2774 list_del(&card->list);
2775}
2776
2777static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2778{
2779 struct snd_soc_card *card = component->card;
2780
2781 snd_soc_unregister_dais(component);
2782
2783 if (card)
2784 snd_soc_unbind_card(card, false);
2785
2786 list_del(&component->list);
2787}
2788
2789int snd_soc_component_initialize(struct snd_soc_component *component,
2790 const struct snd_soc_component_driver *driver,
2791 struct device *dev)
2792{
2793 INIT_LIST_HEAD(&component->dai_list);
2794 INIT_LIST_HEAD(&component->dobj_list);
2795 INIT_LIST_HEAD(&component->card_list);
2796 INIT_LIST_HEAD(&component->list);
2797 mutex_init(&component->io_mutex);
2798
2799 component->name = fmt_single_name(dev, &component->id);
2800 if (!component->name) {
2801 dev_err(dev, "ASoC: Failed to allocate name\n");
2802 return -ENOMEM;
2803 }
2804
2805 component->dev = dev;
2806 component->driver = driver;
2807
2808#ifdef CONFIG_DEBUG_FS
2809 if (!component->debugfs_prefix)
2810 component->debugfs_prefix = driver->debugfs_prefix;
2811#endif
2812
2813 return 0;
2814}
2815EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2816
2817int snd_soc_add_component(struct snd_soc_component *component,
2818 struct snd_soc_dai_driver *dai_drv,
2819 int num_dai)
2820{
2821 int ret;
2822 int i;
2823
2824 mutex_lock(&client_mutex);
2825
2826 if (component->driver->endianness) {
2827 for (i = 0; i < num_dai; i++) {
2828 convert_endianness_formats(&dai_drv[i].playback);
2829 convert_endianness_formats(&dai_drv[i].capture);
2830 }
2831 }
2832
2833 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2834 if (ret < 0) {
2835 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2836 ret);
2837 goto err_cleanup;
2838 }
2839
2840 if (!component->driver->write && !component->driver->read) {
2841 if (!component->regmap)
2842 component->regmap = dev_get_regmap(component->dev,
2843 NULL);
2844 if (component->regmap)
2845 snd_soc_component_setup_regmap(component);
2846 }
2847
2848 /* see for_each_component */
2849 list_add(&component->list, &component_list);
2850
2851err_cleanup:
2852 if (ret < 0)
2853 snd_soc_del_component_unlocked(component);
2854
2855 mutex_unlock(&client_mutex);
2856
2857 if (ret == 0)
2858 snd_soc_try_rebind_card();
2859
2860 return ret;
2861}
2862EXPORT_SYMBOL_GPL(snd_soc_add_component);
2863
2864int snd_soc_register_component(struct device *dev,
2865 const struct snd_soc_component_driver *component_driver,
2866 struct snd_soc_dai_driver *dai_drv,
2867 int num_dai)
2868{
2869 struct snd_soc_component *component;
2870 int ret;
2871
2872 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2873 if (!component)
2874 return -ENOMEM;
2875
2876 ret = snd_soc_component_initialize(component, component_driver, dev);
2877 if (ret < 0)
2878 return ret;
2879
2880 return snd_soc_add_component(component, dai_drv, num_dai);
2881}
2882EXPORT_SYMBOL_GPL(snd_soc_register_component);
2883
2884/**
2885 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2886 * from the ASoC core
2887 *
2888 * @dev: The device to unregister
2889 * @component_driver: The component driver to unregister
2890 */
2891void snd_soc_unregister_component_by_driver(struct device *dev,
2892 const struct snd_soc_component_driver *component_driver)
2893{
2894 struct snd_soc_component *component;
2895
2896 if (!component_driver)
2897 return;
2898
2899 mutex_lock(&client_mutex);
2900 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2901 if (!component)
2902 goto out;
2903
2904 snd_soc_del_component_unlocked(component);
2905
2906out:
2907 mutex_unlock(&client_mutex);
2908}
2909EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2910
2911/**
2912 * snd_soc_unregister_component - Unregister all related component
2913 * from the ASoC core
2914 *
2915 * @dev: The device to unregister
2916 */
2917void snd_soc_unregister_component(struct device *dev)
2918{
2919 mutex_lock(&client_mutex);
2920 while (1) {
2921 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2922
2923 if (!component)
2924 break;
2925
2926 snd_soc_del_component_unlocked(component);
2927 }
2928 mutex_unlock(&client_mutex);
2929}
2930EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2931
2932/* Retrieve a card's name from device tree */
2933int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2934 const char *propname)
2935{
2936 struct device_node *np;
2937 int ret;
2938
2939 if (!card->dev) {
2940 pr_err("card->dev is not set before calling %s\n", __func__);
2941 return -EINVAL;
2942 }
2943
2944 np = card->dev->of_node;
2945
2946 ret = of_property_read_string_index(np, propname, 0, &card->name);
2947 /*
2948 * EINVAL means the property does not exist. This is fine providing
2949 * card->name was previously set, which is checked later in
2950 * snd_soc_register_card.
2951 */
2952 if (ret < 0 && ret != -EINVAL) {
2953 dev_err(card->dev,
2954 "ASoC: Property '%s' could not be read: %d\n",
2955 propname, ret);
2956 return ret;
2957 }
2958
2959 return 0;
2960}
2961EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2962
2963static const struct snd_soc_dapm_widget simple_widgets[] = {
2964 SND_SOC_DAPM_MIC("Microphone", NULL),
2965 SND_SOC_DAPM_LINE("Line", NULL),
2966 SND_SOC_DAPM_HP("Headphone", NULL),
2967 SND_SOC_DAPM_SPK("Speaker", NULL),
2968};
2969
2970int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2971 const char *propname)
2972{
2973 struct device_node *np = card->dev->of_node;
2974 struct snd_soc_dapm_widget *widgets;
2975 const char *template, *wname;
2976 int i, j, num_widgets;
2977
2978 num_widgets = of_property_count_strings(np, propname);
2979 if (num_widgets < 0) {
2980 dev_err(card->dev,
2981 "ASoC: Property '%s' does not exist\n", propname);
2982 return -EINVAL;
2983 }
2984 if (!num_widgets) {
2985 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2986 propname);
2987 return -EINVAL;
2988 }
2989 if (num_widgets & 1) {
2990 dev_err(card->dev,
2991 "ASoC: Property '%s' length is not even\n", propname);
2992 return -EINVAL;
2993 }
2994
2995 num_widgets /= 2;
2996
2997 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2998 GFP_KERNEL);
2999 if (!widgets) {
3000 dev_err(card->dev,
3001 "ASoC: Could not allocate memory for widgets\n");
3002 return -ENOMEM;
3003 }
3004
3005 for (i = 0; i < num_widgets; i++) {
3006 int ret = of_property_read_string_index(np, propname,
3007 2 * i, &template);
3008 if (ret) {
3009 dev_err(card->dev,
3010 "ASoC: Property '%s' index %d read error:%d\n",
3011 propname, 2 * i, ret);
3012 return -EINVAL;
3013 }
3014
3015 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3016 if (!strncmp(template, simple_widgets[j].name,
3017 strlen(simple_widgets[j].name))) {
3018 widgets[i] = simple_widgets[j];
3019 break;
3020 }
3021 }
3022
3023 if (j >= ARRAY_SIZE(simple_widgets)) {
3024 dev_err(card->dev,
3025 "ASoC: DAPM widget '%s' is not supported\n",
3026 template);
3027 return -EINVAL;
3028 }
3029
3030 ret = of_property_read_string_index(np, propname,
3031 (2 * i) + 1,
3032 &wname);
3033 if (ret) {
3034 dev_err(card->dev,
3035 "ASoC: Property '%s' index %d read error:%d\n",
3036 propname, (2 * i) + 1, ret);
3037 return -EINVAL;
3038 }
3039
3040 widgets[i].name = wname;
3041 }
3042
3043 card->of_dapm_widgets = widgets;
3044 card->num_of_dapm_widgets = num_widgets;
3045
3046 return 0;
3047}
3048EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3049
3050int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3051{
3052 const unsigned int nb_controls_max = 16;
3053 const char **strings, *control_name;
3054 struct snd_kcontrol_new *controls;
3055 struct device *dev = card->dev;
3056 unsigned int i, nb_controls;
3057 int ret;
3058
3059 if (!of_property_read_bool(dev->of_node, prop))
3060 return 0;
3061
3062 strings = devm_kcalloc(dev, nb_controls_max,
3063 sizeof(*strings), GFP_KERNEL);
3064 if (!strings)
3065 return -ENOMEM;
3066
3067 ret = of_property_read_string_array(dev->of_node, prop,
3068 strings, nb_controls_max);
3069 if (ret < 0)
3070 return ret;
3071
3072 nb_controls = (unsigned int)ret;
3073
3074 controls = devm_kcalloc(dev, nb_controls,
3075 sizeof(*controls), GFP_KERNEL);
3076 if (!controls)
3077 return -ENOMEM;
3078
3079 for (i = 0; i < nb_controls; i++) {
3080 control_name = devm_kasprintf(dev, GFP_KERNEL,
3081 "%s Switch", strings[i]);
3082 if (!control_name)
3083 return -ENOMEM;
3084
3085 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3086 controls[i].name = control_name;
3087 controls[i].info = snd_soc_dapm_info_pin_switch;
3088 controls[i].get = snd_soc_dapm_get_pin_switch;
3089 controls[i].put = snd_soc_dapm_put_pin_switch;
3090 controls[i].private_value = (unsigned long)strings[i];
3091 }
3092
3093 card->controls = controls;
3094 card->num_controls = nb_controls;
3095
3096 return 0;
3097}
3098EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3099
3100int snd_soc_of_get_slot_mask(struct device_node *np,
3101 const char *prop_name,
3102 unsigned int *mask)
3103{
3104 u32 val;
3105 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3106 int i;
3107
3108 if (!of_slot_mask)
3109 return 0;
3110 val /= sizeof(u32);
3111 for (i = 0; i < val; i++)
3112 if (be32_to_cpup(&of_slot_mask[i]))
3113 *mask |= (1 << i);
3114
3115 return val;
3116}
3117EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3118
3119int snd_soc_of_parse_tdm_slot(struct device_node *np,
3120 unsigned int *tx_mask,
3121 unsigned int *rx_mask,
3122 unsigned int *slots,
3123 unsigned int *slot_width)
3124{
3125 u32 val;
3126 int ret;
3127
3128 if (tx_mask)
3129 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3130 if (rx_mask)
3131 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3132
3133 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3134 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3135 if (ret)
3136 return ret;
3137
3138 if (slots)
3139 *slots = val;
3140 }
3141
3142 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3143 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3144 if (ret)
3145 return ret;
3146
3147 if (slot_width)
3148 *slot_width = val;
3149 }
3150
3151 return 0;
3152}
3153EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3154
3155void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3156 struct snd_soc_dai_link_component *cpus)
3157{
3158 platforms->of_node = cpus->of_node;
3159 platforms->dai_args = cpus->dai_args;
3160}
3161EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3162
3163void snd_soc_of_parse_node_prefix(struct device_node *np,
3164 struct snd_soc_codec_conf *codec_conf,
3165 struct device_node *of_node,
3166 const char *propname)
3167{
3168 const char *str;
3169 int ret;
3170
3171 ret = of_property_read_string(np, propname, &str);
3172 if (ret < 0) {
3173 /* no prefix is not error */
3174 return;
3175 }
3176
3177 codec_conf->dlc.of_node = of_node;
3178 codec_conf->name_prefix = str;
3179}
3180EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3181
3182int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3183 const char *propname)
3184{
3185 struct device_node *np = card->dev->of_node;
3186 int num_routes;
3187 struct snd_soc_dapm_route *routes;
3188 int i;
3189
3190 num_routes = of_property_count_strings(np, propname);
3191 if (num_routes < 0 || num_routes & 1) {
3192 dev_err(card->dev,
3193 "ASoC: Property '%s' does not exist or its length is not even\n",
3194 propname);
3195 return -EINVAL;
3196 }
3197 num_routes /= 2;
3198
3199 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3200 GFP_KERNEL);
3201 if (!routes) {
3202 dev_err(card->dev,
3203 "ASoC: Could not allocate DAPM route table\n");
3204 return -ENOMEM;
3205 }
3206
3207 for (i = 0; i < num_routes; i++) {
3208 int ret = of_property_read_string_index(np, propname,
3209 2 * i, &routes[i].sink);
3210 if (ret) {
3211 dev_err(card->dev,
3212 "ASoC: Property '%s' index %d could not be read: %d\n",
3213 propname, 2 * i, ret);
3214 return -EINVAL;
3215 }
3216 ret = of_property_read_string_index(np, propname,
3217 (2 * i) + 1, &routes[i].source);
3218 if (ret) {
3219 dev_err(card->dev,
3220 "ASoC: Property '%s' index %d could not be read: %d\n",
3221 propname, (2 * i) + 1, ret);
3222 return -EINVAL;
3223 }
3224 }
3225
3226 card->num_of_dapm_routes = num_routes;
3227 card->of_dapm_routes = routes;
3228
3229 return 0;
3230}
3231EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3232
3233int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3234{
3235 struct device_node *node = card->dev->of_node;
3236 struct snd_soc_aux_dev *aux;
3237 int num, i;
3238
3239 num = of_count_phandle_with_args(node, propname, NULL);
3240 if (num == -ENOENT) {
3241 return 0;
3242 } else if (num < 0) {
3243 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3244 propname, num);
3245 return num;
3246 }
3247
3248 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3249 if (!aux)
3250 return -ENOMEM;
3251 card->aux_dev = aux;
3252 card->num_aux_devs = num;
3253
3254 for_each_card_pre_auxs(card, i, aux) {
3255 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3256 if (!aux->dlc.of_node)
3257 return -EINVAL;
3258 }
3259
3260 return 0;
3261}
3262EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3263
3264unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3265{
3266 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3267
3268 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3269 case SND_SOC_DAIFMT_CBP_CFP:
3270 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3271 break;
3272 case SND_SOC_DAIFMT_CBP_CFC:
3273 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3274 break;
3275 case SND_SOC_DAIFMT_CBC_CFP:
3276 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3277 break;
3278 case SND_SOC_DAIFMT_CBC_CFC:
3279 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3280 break;
3281 }
3282
3283 return inv_dai_fmt;
3284}
3285EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3286
3287unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3288{
3289 /*
3290 * bit_frame is return value from
3291 * snd_soc_daifmt_parse_clock_provider_raw()
3292 */
3293
3294 /* Codec base */
3295 switch (bit_frame) {
3296 case 0x11:
3297 return SND_SOC_DAIFMT_CBP_CFP;
3298 case 0x10:
3299 return SND_SOC_DAIFMT_CBP_CFC;
3300 case 0x01:
3301 return SND_SOC_DAIFMT_CBC_CFP;
3302 default:
3303 return SND_SOC_DAIFMT_CBC_CFC;
3304 }
3305
3306 return 0;
3307}
3308EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3309
3310unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3311 const char *prefix)
3312{
3313 int ret;
3314 char prop[128];
3315 unsigned int format = 0;
3316 int bit, frame;
3317 const char *str;
3318 struct {
3319 char *name;
3320 unsigned int val;
3321 } of_fmt_table[] = {
3322 { "i2s", SND_SOC_DAIFMT_I2S },
3323 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3324 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3325 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3326 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3327 { "ac97", SND_SOC_DAIFMT_AC97 },
3328 { "pdm", SND_SOC_DAIFMT_PDM},
3329 { "msb", SND_SOC_DAIFMT_MSB },
3330 { "lsb", SND_SOC_DAIFMT_LSB },
3331 };
3332
3333 if (!prefix)
3334 prefix = "";
3335
3336 /*
3337 * check "dai-format = xxx"
3338 * or "[prefix]format = xxx"
3339 * SND_SOC_DAIFMT_FORMAT_MASK area
3340 */
3341 ret = of_property_read_string(np, "dai-format", &str);
3342 if (ret < 0) {
3343 snprintf(prop, sizeof(prop), "%sformat", prefix);
3344 ret = of_property_read_string(np, prop, &str);
3345 }
3346 if (ret == 0) {
3347 int i;
3348
3349 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3350 if (strcmp(str, of_fmt_table[i].name) == 0) {
3351 format |= of_fmt_table[i].val;
3352 break;
3353 }
3354 }
3355 }
3356
3357 /*
3358 * check "[prefix]continuous-clock"
3359 * SND_SOC_DAIFMT_CLOCK_MASK area
3360 */
3361 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3362 if (of_property_read_bool(np, prop))
3363 format |= SND_SOC_DAIFMT_CONT;
3364 else
3365 format |= SND_SOC_DAIFMT_GATED;
3366
3367 /*
3368 * check "[prefix]bitclock-inversion"
3369 * check "[prefix]frame-inversion"
3370 * SND_SOC_DAIFMT_INV_MASK area
3371 */
3372 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3373 bit = !!of_get_property(np, prop, NULL);
3374
3375 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3376 frame = !!of_get_property(np, prop, NULL);
3377
3378 switch ((bit << 4) + frame) {
3379 case 0x11:
3380 format |= SND_SOC_DAIFMT_IB_IF;
3381 break;
3382 case 0x10:
3383 format |= SND_SOC_DAIFMT_IB_NF;
3384 break;
3385 case 0x01:
3386 format |= SND_SOC_DAIFMT_NB_IF;
3387 break;
3388 default:
3389 /* SND_SOC_DAIFMT_NB_NF is default */
3390 break;
3391 }
3392
3393 return format;
3394}
3395EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3396
3397unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3398 const char *prefix,
3399 struct device_node **bitclkmaster,
3400 struct device_node **framemaster)
3401{
3402 char prop[128];
3403 unsigned int bit, frame;
3404
3405 if (!prefix)
3406 prefix = "";
3407
3408 /*
3409 * check "[prefix]bitclock-master"
3410 * check "[prefix]frame-master"
3411 */
3412 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3413 bit = !!of_get_property(np, prop, NULL);
3414 if (bit && bitclkmaster)
3415 *bitclkmaster = of_parse_phandle(np, prop, 0);
3416
3417 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3418 frame = !!of_get_property(np, prop, NULL);
3419 if (frame && framemaster)
3420 *framemaster = of_parse_phandle(np, prop, 0);
3421
3422 /*
3423 * return bitmap.
3424 * It will be parameter of
3425 * snd_soc_daifmt_clock_provider_from_bitmap()
3426 */
3427 return (bit << 4) + frame;
3428}
3429EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3430
3431int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3432{
3433 /*
3434 * [Normal]
3435 *
3436 * Playback
3437 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3438 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3439 *
3440 * Capture
3441 * CPU : SNDRV_PCM_STREAM_CAPTURE
3442 * Codec: SNDRV_PCM_STREAM_CAPTURE
3443 */
3444 if (!dai_link->c2c_params)
3445 return stream;
3446
3447 /*
3448 * [Codec2Codec]
3449 *
3450 * Playback
3451 * CPU : SNDRV_PCM_STREAM_CAPTURE
3452 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3453 *
3454 * Capture
3455 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3456 * Codec: SNDRV_PCM_STREAM_CAPTURE
3457 */
3458 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3459 return SNDRV_PCM_STREAM_PLAYBACK;
3460
3461 return SNDRV_PCM_STREAM_CAPTURE;
3462}
3463EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3464
3465int snd_soc_get_dai_id(struct device_node *ep)
3466{
3467 struct snd_soc_component *component;
3468 struct snd_soc_dai_link_component dlc = {
3469 .of_node = of_graph_get_port_parent(ep),
3470 };
3471 int ret;
3472
3473
3474 /*
3475 * For example HDMI case, HDMI has video/sound port,
3476 * but ALSA SoC needs sound port number only.
3477 * Thus counting HDMI DT port/endpoint doesn't work.
3478 * Then, it should have .of_xlate_dai_id
3479 */
3480 ret = -ENOTSUPP;
3481 mutex_lock(&client_mutex);
3482 component = soc_find_component(&dlc);
3483 if (component)
3484 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3485 mutex_unlock(&client_mutex);
3486
3487 of_node_put(dlc.of_node);
3488
3489 return ret;
3490}
3491EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3492
3493int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3494{
3495 struct snd_soc_component *pos;
3496 int ret = -EPROBE_DEFER;
3497
3498 mutex_lock(&client_mutex);
3499 for_each_component(pos) {
3500 struct device_node *component_of_node = soc_component_to_node(pos);
3501
3502 if (component_of_node != args->np || !pos->num_dai)
3503 continue;
3504
3505 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3506 if (ret == -ENOTSUPP) {
3507 struct snd_soc_dai *dai;
3508 int id = -1;
3509
3510 switch (args->args_count) {
3511 case 0:
3512 id = 0; /* same as dai_drv[0] */
3513 break;
3514 case 1:
3515 id = args->args[0];
3516 break;
3517 default:
3518 /* not supported */
3519 break;
3520 }
3521
3522 if (id < 0 || id >= pos->num_dai) {
3523 ret = -EINVAL;
3524 continue;
3525 }
3526
3527 ret = 0;
3528
3529 /* find target DAI */
3530 for_each_component_dais(pos, dai) {
3531 if (id == 0)
3532 break;
3533 id--;
3534 }
3535
3536 dlc->dai_name = snd_soc_dai_name_get(dai);
3537 } else if (ret) {
3538 /*
3539 * if another error than ENOTSUPP is returned go on and
3540 * check if another component is provided with the same
3541 * node. This may happen if a device provides several
3542 * components
3543 */
3544 continue;
3545 }
3546
3547 break;
3548 }
3549
3550 if (ret == 0)
3551 dlc->of_node = args->np;
3552
3553 mutex_unlock(&client_mutex);
3554 return ret;
3555}
3556EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3557
3558int snd_soc_of_get_dlc(struct device_node *of_node,
3559 struct of_phandle_args *args,
3560 struct snd_soc_dai_link_component *dlc,
3561 int index)
3562{
3563 struct of_phandle_args __args;
3564 int ret;
3565
3566 if (!args)
3567 args = &__args;
3568
3569 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3570 "#sound-dai-cells", index, args);
3571 if (ret)
3572 return ret;
3573
3574 return snd_soc_get_dlc(args, dlc);
3575}
3576EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3577
3578int snd_soc_get_dai_name(const struct of_phandle_args *args,
3579 const char **dai_name)
3580{
3581 struct snd_soc_dai_link_component dlc;
3582 int ret = snd_soc_get_dlc(args, &dlc);
3583
3584 if (ret == 0)
3585 *dai_name = dlc.dai_name;
3586
3587 return ret;
3588}
3589EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3590
3591int snd_soc_of_get_dai_name(struct device_node *of_node,
3592 const char **dai_name, int index)
3593{
3594 struct snd_soc_dai_link_component dlc;
3595 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3596
3597 if (ret == 0)
3598 *dai_name = dlc.dai_name;
3599
3600 return ret;
3601}
3602EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3603
3604struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
3605{
3606 struct snd_soc_dai *dai;
3607 struct snd_soc_component *component;
3608
3609 mutex_lock(&client_mutex);
3610 for_each_component(component) {
3611 for_each_component_dais(component, dai)
3612 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3613 goto found;
3614 }
3615 dai = NULL;
3616found:
3617 mutex_unlock(&client_mutex);
3618 return dai;
3619}
3620EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3621
3622static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3623{
3624 if (component->of_node) {
3625 of_node_put(component->of_node);
3626 component->of_node = NULL;
3627 }
3628}
3629
3630static int __snd_soc_of_get_dai_link_component_alloc(
3631 struct device *dev, struct device_node *of_node,
3632 struct snd_soc_dai_link_component **ret_component,
3633 int *ret_num)
3634{
3635 struct snd_soc_dai_link_component *component;
3636 int num;
3637
3638 /* Count the number of CPUs/CODECs */
3639 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3640 if (num <= 0) {
3641 if (num == -ENOENT)
3642 dev_err(dev, "No 'sound-dai' property\n");
3643 else
3644 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3645 return num;
3646 }
3647 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3648 if (!component)
3649 return -ENOMEM;
3650
3651 *ret_component = component;
3652 *ret_num = num;
3653
3654 return 0;
3655}
3656
3657/*
3658 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3659 * @dai_link: DAI link
3660 *
3661 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3662 */
3663void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3664{
3665 struct snd_soc_dai_link_component *component;
3666 int index;
3667
3668 for_each_link_codecs(dai_link, index, component)
3669 __snd_soc_of_put_component(component);
3670}
3671EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3672
3673/*
3674 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3675 * @dev: Card device
3676 * @of_node: Device node
3677 * @dai_link: DAI link
3678 *
3679 * Builds an array of CODEC DAI components from the DAI link property
3680 * 'sound-dai'.
3681 * The array is set in the DAI link and the number of DAIs is set accordingly.
3682 * The device nodes in the array (of_node) must be dereferenced by calling
3683 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3684 *
3685 * Returns 0 for success
3686 */
3687int snd_soc_of_get_dai_link_codecs(struct device *dev,
3688 struct device_node *of_node,
3689 struct snd_soc_dai_link *dai_link)
3690{
3691 struct snd_soc_dai_link_component *component;
3692 int index, ret;
3693
3694 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3695 &dai_link->codecs, &dai_link->num_codecs);
3696 if (ret < 0)
3697 return ret;
3698
3699 /* Parse the list */
3700 for_each_link_codecs(dai_link, index, component) {
3701 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3702 if (ret)
3703 goto err;
3704 }
3705 return 0;
3706err:
3707 snd_soc_of_put_dai_link_codecs(dai_link);
3708 dai_link->codecs = NULL;
3709 dai_link->num_codecs = 0;
3710 return ret;
3711}
3712EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3713
3714/*
3715 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3716 * @dai_link: DAI link
3717 *
3718 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3719 */
3720void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3721{
3722 struct snd_soc_dai_link_component *component;
3723 int index;
3724
3725 for_each_link_cpus(dai_link, index, component)
3726 __snd_soc_of_put_component(component);
3727}
3728EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3729
3730/*
3731 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3732 * @dev: Card device
3733 * @of_node: Device node
3734 * @dai_link: DAI link
3735 *
3736 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3737 * instead.
3738 *
3739 * Returns 0 for success
3740 */
3741int snd_soc_of_get_dai_link_cpus(struct device *dev,
3742 struct device_node *of_node,
3743 struct snd_soc_dai_link *dai_link)
3744{
3745 struct snd_soc_dai_link_component *component;
3746 int index, ret;
3747
3748 /* Count the number of CPUs */
3749 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3750 &dai_link->cpus, &dai_link->num_cpus);
3751 if (ret < 0)
3752 return ret;
3753
3754 /* Parse the list */
3755 for_each_link_cpus(dai_link, index, component) {
3756 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3757 if (ret)
3758 goto err;
3759 }
3760 return 0;
3761err:
3762 snd_soc_of_put_dai_link_cpus(dai_link);
3763 dai_link->cpus = NULL;
3764 dai_link->num_cpus = 0;
3765 return ret;
3766}
3767EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3768
3769static int __init snd_soc_init(void)
3770{
3771 int ret;
3772
3773 snd_soc_debugfs_init();
3774 ret = snd_soc_util_init();
3775 if (ret)
3776 goto err_util_init;
3777
3778 ret = platform_driver_register(&soc_driver);
3779 if (ret)
3780 goto err_register;
3781 return 0;
3782
3783err_register:
3784 snd_soc_util_exit();
3785err_util_init:
3786 snd_soc_debugfs_exit();
3787 return ret;
3788}
3789module_init(snd_soc_init);
3790
3791static void __exit snd_soc_exit(void)
3792{
3793 snd_soc_util_exit();
3794 snd_soc_debugfs_exit();
3795
3796 platform_driver_unregister(&soc_driver);
3797}
3798module_exit(snd_soc_exit);
3799
3800/* Module information */
3801MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3802MODULE_DESCRIPTION("ALSA SoC Core");
3803MODULE_LICENSE("GPL");
3804MODULE_ALIAS("platform:soc-audio");