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