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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(struct of_phandle_args *args1,
242 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 (strcmp(dlc->dai_name, dai->name) == 0)
287 return 1;
288
289 if (dai->driver->name &&
290 strcmp(dai->driver->name, dlc->dai_name) == 0)
291 return 1;
292
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
295 return 1;
296
297 return 0;
298}
299
300const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
301{
302 /* see snd_soc_is_matching_dai() */
303 if (dai->name)
304 return dai->name;
305
306 if (dai->driver->name)
307 return dai->driver->name;
308
309 if (dai->component->name)
310 return dai->component->name;
311
312 return NULL;
313}
314EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
315
316static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
318{
319 struct snd_soc_component *comp;
320 int i;
321
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
325 return 0;
326 }
327
328 /* see for_each_rtd_components */
329 rtd->components[rtd->num_components] = component;
330 rtd->num_components++;
331
332 return 0;
333}
334
335struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
337{
338 struct snd_soc_component *component;
339 int i;
340
341 if (!driver_name)
342 return NULL;
343
344 /*
345 * NOTE
346 *
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
351 */
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
354
355 if (!component_name)
356 continue;
357
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
360 return component;
361 }
362
363 return NULL;
364}
365EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
366
367struct snd_soc_component
368*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
369{
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
372
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
376 (!driver_name ||
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
380 break;
381 }
382 }
383
384 return found_component;
385}
386EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
387
388struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
390{
391 struct snd_soc_component *component;
392
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
396
397 return component;
398}
399EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
400
401struct snd_soc_pcm_runtime
402*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
404{
405 struct snd_soc_pcm_runtime *rtd;
406
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
409 return rtd;
410 }
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
412 return NULL;
413}
414EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
415
416/*
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
420 */
421void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
422{
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
425
426 snd_soc_dpcm_mutex_lock(rtd);
427
428 dev_dbg(rtd->dev,
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
434
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
437 rtd->pop_wait = 0;
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
440 }
441
442 snd_soc_dpcm_mutex_unlock(rtd);
443}
444EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
445
446static void soc_release_rtd_dev(struct device *dev)
447{
448 /* "dev" means "rtd->dev" */
449 kfree(dev);
450}
451
452static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
453{
454 if (!rtd)
455 return;
456
457 list_del(&rtd->list);
458
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
462
463 /*
464 * we don't need to call kfree() for rtd->dev
465 * see
466 * soc_release_rtd_dev()
467 *
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
470 * see
471 * soc_new_pcm_runtime()
472 *
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
475 * see
476 * soc_new_pcm_runtime()
477 *
478 * rtd = devm_kzalloc(dev, ...);
479 * rtd->dev = dev
480 */
481 device_unregister(rtd->dev);
482}
483
484static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
487 delayed_work.work);
488
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
491}
492
493static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
495{
496 struct snd_soc_pcm_runtime *rtd;
497 struct snd_soc_component *component;
498 struct device *dev;
499 int ret;
500 int stream;
501
502 /*
503 * for rtd->dev
504 */
505 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
506 if (!dev)
507 return NULL;
508
509 dev->parent = card->dev;
510 dev->release = soc_release_rtd_dev;
511
512 dev_set_name(dev, "%s", dai_link->name);
513
514 ret = device_register(dev);
515 if (ret < 0) {
516 put_device(dev); /* soc_release_rtd_dev */
517 return NULL;
518 }
519
520 /*
521 * for rtd
522 */
523 rtd = devm_kzalloc(dev,
524 sizeof(*rtd) +
525 sizeof(component) * (dai_link->num_cpus +
526 dai_link->num_codecs +
527 dai_link->num_platforms),
528 GFP_KERNEL);
529 if (!rtd) {
530 device_unregister(dev);
531 return NULL;
532 }
533
534 rtd->dev = dev;
535 INIT_LIST_HEAD(&rtd->list);
536 for_each_pcm_streams(stream) {
537 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
538 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
539 }
540 dev_set_drvdata(dev, rtd);
541 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
542
543 /*
544 * for rtd->dais
545 */
546 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
547 sizeof(struct snd_soc_dai *),
548 GFP_KERNEL);
549 if (!rtd->dais)
550 goto free_rtd;
551
552 /*
553 * dais = [][][][][][][][][][][][][][][][][][]
554 * ^cpu_dais ^codec_dais
555 * |--- num_cpus ---|--- num_codecs --|
556 * see
557 * snd_soc_rtd_to_cpu()
558 * snd_soc_rtd_to_codec()
559 */
560 rtd->card = card;
561 rtd->dai_link = dai_link;
562 rtd->num = card->num_rtd++;
563 rtd->pmdown_time = pmdown_time; /* default power off timeout */
564
565 /* see for_each_card_rtds */
566 list_add_tail(&rtd->list, &card->rtd_list);
567
568 ret = device_add_groups(dev, soc_dev_attr_groups);
569 if (ret < 0)
570 goto free_rtd;
571
572 return rtd;
573
574free_rtd:
575 soc_free_pcm_runtime(rtd);
576 return NULL;
577}
578
579static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
580{
581 struct snd_soc_dai_link *dai_link;
582 int i;
583
584 /*
585 * COMP_DUMMY() creates size 0 array on dai_link.
586 * Fill it as dummy DAI in case of CPU/Codec here.
587 * Do nothing for Platform.
588 */
589 for_each_card_prelinks(card, i, dai_link) {
590 if (dai_link->num_cpus == 0 && dai_link->cpus) {
591 dai_link->num_cpus = 1;
592 dai_link->cpus = &snd_soc_dummy_dlc;
593 }
594 if (dai_link->num_codecs == 0 && dai_link->codecs) {
595 dai_link->num_codecs = 1;
596 dai_link->codecs = &snd_soc_dummy_dlc;
597 }
598 }
599}
600
601static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
602{
603 struct snd_soc_pcm_runtime *rtd;
604
605 for_each_card_rtds(card, rtd)
606 flush_delayed_work(&rtd->delayed_work);
607}
608
609#ifdef CONFIG_PM_SLEEP
610static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
611{
612 struct snd_soc_pcm_runtime *rtd;
613 struct snd_soc_dai *dai;
614 int playback = SNDRV_PCM_STREAM_PLAYBACK;
615 int i;
616
617 for_each_card_rtds(card, rtd) {
618
619 if (rtd->dai_link->ignore_suspend)
620 continue;
621
622 for_each_rtd_dais(rtd, i, dai) {
623 if (snd_soc_dai_stream_active(dai, playback))
624 snd_soc_dai_digital_mute(dai, mute, playback);
625 }
626 }
627}
628
629static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
630{
631 struct snd_soc_pcm_runtime *rtd;
632 int stream;
633
634 for_each_card_rtds(card, rtd) {
635
636 if (rtd->dai_link->ignore_suspend)
637 continue;
638
639 for_each_pcm_streams(stream)
640 snd_soc_dapm_stream_event(rtd, stream, event);
641 }
642}
643
644/* powers down audio subsystem for suspend */
645int snd_soc_suspend(struct device *dev)
646{
647 struct snd_soc_card *card = dev_get_drvdata(dev);
648 struct snd_soc_component *component;
649 struct snd_soc_pcm_runtime *rtd;
650 int i;
651
652 /* If the card is not initialized yet there is nothing to do */
653 if (!snd_soc_card_is_instantiated(card))
654 return 0;
655
656 /*
657 * Due to the resume being scheduled into a workqueue we could
658 * suspend before that's finished - wait for it to complete.
659 */
660 snd_power_wait(card->snd_card);
661
662 /* we're going to block userspace touching us until resume completes */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
664
665 /* mute any active DACs */
666 soc_playback_digital_mute(card, 1);
667
668 /* suspend all pcms */
669 for_each_card_rtds(card, rtd) {
670 if (rtd->dai_link->ignore_suspend)
671 continue;
672
673 snd_pcm_suspend_all(rtd->pcm);
674 }
675
676 snd_soc_card_suspend_pre(card);
677
678 /* close any waiting streams */
679 snd_soc_flush_all_delayed_work(card);
680
681 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
682
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card);
685 snd_soc_dapm_sync(&card->dapm);
686
687 /* suspend all COMPONENTs */
688 for_each_card_rtds(card, rtd) {
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 for_each_rtd_components(rtd, i, component) {
694 struct snd_soc_dapm_context *dapm =
695 snd_soc_component_get_dapm(component);
696
697 /*
698 * ignore if component was already suspended
699 */
700 if (snd_soc_component_is_suspended(component))
701 continue;
702
703 /*
704 * If there are paths active then the COMPONENT will be
705 * held with bias _ON and should not be suspended.
706 */
707 switch (snd_soc_dapm_get_bias_level(dapm)) {
708 case SND_SOC_BIAS_STANDBY:
709 /*
710 * If the COMPONENT is capable of idle
711 * bias off then being in STANDBY
712 * means it's doing something,
713 * otherwise fall through.
714 */
715 if (dapm->idle_bias_off) {
716 dev_dbg(component->dev,
717 "ASoC: idle_bias_off CODEC on over suspend\n");
718 break;
719 }
720 fallthrough;
721
722 case SND_SOC_BIAS_OFF:
723 snd_soc_component_suspend(component);
724 if (component->regmap)
725 regcache_mark_dirty(component->regmap);
726 /* deactivate pins to sleep state */
727 pinctrl_pm_select_sleep_state(component->dev);
728 break;
729 default:
730 dev_dbg(component->dev,
731 "ASoC: COMPONENT is on over suspend\n");
732 break;
733 }
734 }
735 }
736
737 snd_soc_card_suspend_post(card);
738
739 return 0;
740}
741EXPORT_SYMBOL_GPL(snd_soc_suspend);
742
743/*
744 * deferred resume work, so resume can complete before we finished
745 * setting our codec back up, which can be very slow on I2C
746 */
747static void soc_resume_deferred(struct work_struct *work)
748{
749 struct snd_soc_card *card =
750 container_of(work, struct snd_soc_card,
751 deferred_resume_work);
752 struct snd_soc_component *component;
753
754 /*
755 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
756 * so userspace apps are blocked from touching us
757 */
758
759 dev_dbg(card->dev, "ASoC: starting resume work\n");
760
761 /* Bring us up into D2 so that DAPM starts enabling things */
762 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
763
764 snd_soc_card_resume_pre(card);
765
766 for_each_card_components(card, component) {
767 if (snd_soc_component_is_suspended(component))
768 snd_soc_component_resume(component);
769 }
770
771 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
772
773 /* unmute any active DACs */
774 soc_playback_digital_mute(card, 0);
775
776 snd_soc_card_resume_post(card);
777
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
779
780 /* Recheck all endpoints too, their state is affected by suspend */
781 dapm_mark_endpoints_dirty(card);
782 snd_soc_dapm_sync(&card->dapm);
783
784 /* userspace can access us now we are back as we were before */
785 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
786}
787
788/* powers up audio subsystem after a suspend */
789int snd_soc_resume(struct device *dev)
790{
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 struct snd_soc_component *component;
793
794 /* If the card is not initialized yet there is nothing to do */
795 if (!snd_soc_card_is_instantiated(card))
796 return 0;
797
798 /* activate pins from sleep state */
799 for_each_card_components(card, component)
800 if (snd_soc_component_active(component))
801 pinctrl_pm_select_default_state(component->dev);
802
803 dev_dbg(dev, "ASoC: Scheduling resume work\n");
804 if (!schedule_work(&card->deferred_resume_work))
805 dev_err(dev, "ASoC: resume work item may be lost\n");
806
807 return 0;
808}
809EXPORT_SYMBOL_GPL(snd_soc_resume);
810
811static void soc_resume_init(struct snd_soc_card *card)
812{
813 /* deferred resume work */
814 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
815}
816#else
817#define snd_soc_suspend NULL
818#define snd_soc_resume NULL
819static inline void soc_resume_init(struct snd_soc_card *card) { }
820#endif
821
822static struct device_node
823*soc_component_to_node(struct snd_soc_component *component)
824{
825 struct device_node *of_node;
826
827 of_node = component->dev->of_node;
828 if (!of_node && component->dev->parent)
829 of_node = component->dev->parent->of_node;
830
831 return of_node;
832}
833
834struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, 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, 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 snd_soc_rtd_add_component(rtd, component);
1222 }
1223 }
1224
1225 return 0;
1226
1227_err_defer:
1228 snd_soc_remove_pcm_runtime(card, rtd);
1229 return -EPROBE_DEFER;
1230}
1231
1232int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1233 struct snd_soc_dai_link *dai_link,
1234 int num_dai_link)
1235{
1236 for (int i = 0; i < num_dai_link; i++) {
1237 int ret;
1238
1239 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1240 if (ret < 0)
1241 return ret;
1242
1243 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1244 if (ret < 0)
1245 return ret;
1246 }
1247
1248 return 0;
1249}
1250EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1251
1252static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1253{
1254 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1255 struct snd_soc_dai *dai, *not_used;
1256 u64 pos, possible_fmt;
1257 unsigned int mask = 0, dai_fmt = 0;
1258 int i, j, priority, pri, until;
1259
1260 /*
1261 * Get selectable format from each DAIs.
1262 *
1263 ****************************
1264 * NOTE
1265 * Using .auto_selectable_formats is not mandatory,
1266 * we can select format manually from Sound Card.
1267 * When use it, driver should list well tested format only.
1268 ****************************
1269 *
1270 * ex)
1271 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1272 * (A) (B) (C)
1273 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1274 * DAI1 : { 0xF000, 0x0F00 };
1275 * (X) (Y)
1276 *
1277 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1278 * Here is dev_dbg() message and comments
1279 *
1280 * priority = 1
1281 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1282 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1283 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1284 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1285 * priority = 2
1286 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1287 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1288 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1289 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1290 * priority = 3
1291 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1292 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1293 * found auto selected format: 0000000000000F00
1294 */
1295 until = snd_soc_dai_get_fmt_max_priority(rtd);
1296 for (priority = 1; priority <= until; priority++) {
1297 for_each_rtd_dais(rtd, j, not_used) {
1298
1299 possible_fmt = ULLONG_MAX;
1300 for_each_rtd_dais(rtd, i, dai) {
1301 u64 fmt = 0;
1302
1303 pri = (j >= i) ? priority : priority - 1;
1304 fmt = snd_soc_dai_get_fmt(dai, pri);
1305 possible_fmt &= fmt;
1306 }
1307 if (possible_fmt)
1308 goto found;
1309 }
1310 }
1311 /* Not Found */
1312 return;
1313found:
1314 /*
1315 * convert POSSIBLE_DAIFMT to DAIFMT
1316 *
1317 * Some basic/default settings on each is defined as 0.
1318 * see
1319 * SND_SOC_DAIFMT_NB_NF
1320 * SND_SOC_DAIFMT_GATED
1321 *
1322 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1323 * these value, and will be overwrite to auto selected value.
1324 *
1325 * To avoid such issue, loop from 63 to 0 here.
1326 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1327 * Basic/Default settings of each part and above are defined
1328 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1329 */
1330 for (i = 63; i >= 0; i--) {
1331 pos = 1ULL << i;
1332 switch (possible_fmt & pos) {
1333 /*
1334 * for format
1335 */
1336 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1337 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1338 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1339 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1340 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1341 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1342 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1343 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1344 break;
1345 /*
1346 * for clock
1347 */
1348 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1349 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1350 break;
1351 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1352 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1353 break;
1354 /*
1355 * for clock invert
1356 */
1357 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1358 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1359 break;
1360 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1361 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1362 break;
1363 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1364 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1365 break;
1366 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1367 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1368 break;
1369 /*
1370 * for clock provider / consumer
1371 */
1372 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1373 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1374 break;
1375 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1376 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1377 break;
1378 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1379 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1380 break;
1381 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1382 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1383 break;
1384 }
1385 }
1386
1387 /*
1388 * Some driver might have very complex limitation.
1389 * In such case, user want to auto-select non-limitation part,
1390 * and want to manually specify complex part.
1391 *
1392 * Or for example, if both CPU and Codec can be clock provider,
1393 * but because of its quality, user want to specify it manually.
1394 *
1395 * Use manually specified settings if sound card did.
1396 */
1397 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1398 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1399 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1400 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1401 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1402 mask |= SND_SOC_DAIFMT_INV_MASK;
1403 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1404 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1405
1406 dai_link->dai_fmt |= (dai_fmt & mask);
1407}
1408
1409/**
1410 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1411 * @rtd: The runtime for which the DAI link format should be changed
1412 * @dai_fmt: The new DAI link format
1413 *
1414 * This function updates the DAI link format for all DAIs connected to the DAI
1415 * link for the specified runtime.
1416 *
1417 * Note: For setups with a static format set the dai_fmt field in the
1418 * corresponding snd_dai_link struct instead of using this function.
1419 *
1420 * Returns 0 on success, otherwise a negative error code.
1421 */
1422int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1423 unsigned int dai_fmt)
1424{
1425 struct snd_soc_dai *cpu_dai;
1426 struct snd_soc_dai *codec_dai;
1427 unsigned int i;
1428 int ret;
1429
1430 if (!dai_fmt)
1431 return 0;
1432
1433 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1434 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1435 if (ret != 0 && ret != -ENOTSUPP)
1436 return ret;
1437 }
1438
1439 /* Flip the polarity for the "CPU" end of link */
1440 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1441
1442 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1443 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1444 if (ret != 0 && ret != -ENOTSUPP)
1445 return ret;
1446 }
1447
1448 return 0;
1449}
1450EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1451
1452static int soc_init_pcm_runtime(struct snd_soc_card *card,
1453 struct snd_soc_pcm_runtime *rtd)
1454{
1455 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1456 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1457 struct snd_soc_component *component;
1458 int ret, num, i;
1459
1460 /* do machine specific initialization */
1461 ret = snd_soc_link_init(rtd);
1462 if (ret < 0)
1463 return ret;
1464
1465 snd_soc_runtime_get_dai_fmt(rtd);
1466 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1467 if (ret)
1468 goto err;
1469
1470 /* add DPCM sysfs entries */
1471 soc_dpcm_debugfs_add(rtd);
1472
1473 num = rtd->num;
1474
1475 /*
1476 * most drivers will register their PCMs using DAI link ordering but
1477 * topology based drivers can use the DAI link id field to set PCM
1478 * device number and then use rtd + a base offset of the BEs.
1479 */
1480 for_each_rtd_components(rtd, i, component) {
1481 if (!component->driver->use_dai_pcm_id)
1482 continue;
1483
1484 if (rtd->dai_link->no_pcm)
1485 num += component->driver->be_pcm_base;
1486 else
1487 num = rtd->dai_link->id;
1488 }
1489
1490 /* create compress_device if possible */
1491 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1492 if (ret != -ENOTSUPP)
1493 goto err;
1494
1495 /* create the pcm */
1496 ret = soc_new_pcm(rtd, num);
1497 if (ret < 0) {
1498 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1499 dai_link->stream_name, ret);
1500 goto err;
1501 }
1502
1503 ret = snd_soc_pcm_dai_new(rtd);
1504 if (ret < 0)
1505 goto err;
1506
1507 rtd->initialized = true;
1508
1509 return 0;
1510err:
1511 snd_soc_link_exit(rtd);
1512 return ret;
1513}
1514
1515static void soc_set_name_prefix(struct snd_soc_card *card,
1516 struct snd_soc_component *component)
1517{
1518 struct device_node *of_node = soc_component_to_node(component);
1519 const char *str;
1520 int ret, i;
1521
1522 for (i = 0; i < card->num_configs; i++) {
1523 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1524
1525 if (snd_soc_is_matching_component(&map->dlc, component) &&
1526 map->name_prefix) {
1527 component->name_prefix = map->name_prefix;
1528 return;
1529 }
1530 }
1531
1532 /*
1533 * If there is no configuration table or no match in the table,
1534 * check if a prefix is provided in the node
1535 */
1536 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1537 if (ret < 0)
1538 return;
1539
1540 component->name_prefix = str;
1541}
1542
1543static void soc_remove_component(struct snd_soc_component *component,
1544 int probed)
1545{
1546
1547 if (!component->card)
1548 return;
1549
1550 if (probed)
1551 snd_soc_component_remove(component);
1552
1553 list_del_init(&component->card_list);
1554 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1555 soc_cleanup_component_debugfs(component);
1556 component->card = NULL;
1557 snd_soc_component_module_put_when_remove(component);
1558}
1559
1560static int soc_probe_component(struct snd_soc_card *card,
1561 struct snd_soc_component *component)
1562{
1563 struct snd_soc_dapm_context *dapm =
1564 snd_soc_component_get_dapm(component);
1565 struct snd_soc_dai *dai;
1566 int probed = 0;
1567 int ret;
1568
1569 if (snd_soc_component_is_dummy(component))
1570 return 0;
1571
1572 if (component->card) {
1573 if (component->card != card) {
1574 dev_err(component->dev,
1575 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1576 component->name, card->name, component->card->name);
1577 return -ENODEV;
1578 }
1579 return 0;
1580 }
1581
1582 ret = snd_soc_component_module_get_when_probe(component);
1583 if (ret < 0)
1584 return ret;
1585
1586 component->card = card;
1587 soc_set_name_prefix(card, component);
1588
1589 soc_init_component_debugfs(component);
1590
1591 snd_soc_dapm_init(dapm, card, component);
1592
1593 ret = snd_soc_dapm_new_controls(dapm,
1594 component->driver->dapm_widgets,
1595 component->driver->num_dapm_widgets);
1596
1597 if (ret != 0) {
1598 dev_err(component->dev,
1599 "Failed to create new controls %d\n", ret);
1600 goto err_probe;
1601 }
1602
1603 for_each_component_dais(component, dai) {
1604 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1605 if (ret != 0) {
1606 dev_err(component->dev,
1607 "Failed to create DAI widgets %d\n", ret);
1608 goto err_probe;
1609 }
1610 }
1611
1612 ret = snd_soc_component_probe(component);
1613 if (ret < 0)
1614 goto err_probe;
1615
1616 WARN(dapm->idle_bias_off &&
1617 dapm->bias_level != SND_SOC_BIAS_OFF,
1618 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1619 component->name);
1620 probed = 1;
1621
1622 /*
1623 * machine specific init
1624 * see
1625 * snd_soc_component_set_aux()
1626 */
1627 ret = snd_soc_component_init(component);
1628 if (ret < 0)
1629 goto err_probe;
1630
1631 ret = snd_soc_add_component_controls(component,
1632 component->driver->controls,
1633 component->driver->num_controls);
1634 if (ret < 0)
1635 goto err_probe;
1636
1637 ret = snd_soc_dapm_add_routes(dapm,
1638 component->driver->dapm_routes,
1639 component->driver->num_dapm_routes);
1640 if (ret < 0) {
1641 if (card->disable_route_checks) {
1642 dev_info(card->dev,
1643 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1644 __func__);
1645 } else {
1646 dev_err(card->dev,
1647 "%s: snd_soc_dapm_add_routes failed: %d\n",
1648 __func__, ret);
1649 goto err_probe;
1650 }
1651 }
1652
1653 /* see for_each_card_components */
1654 list_add(&component->card_list, &card->component_dev_list);
1655
1656err_probe:
1657 if (ret < 0)
1658 soc_remove_component(component, probed);
1659
1660 return ret;
1661}
1662
1663static void soc_remove_link_dais(struct snd_soc_card *card)
1664{
1665 struct snd_soc_pcm_runtime *rtd;
1666 int order;
1667
1668 for_each_comp_order(order) {
1669 for_each_card_rtds(card, rtd) {
1670 /* remove all rtd connected DAIs in good order */
1671 snd_soc_pcm_dai_remove(rtd, order);
1672 }
1673 }
1674}
1675
1676static int soc_probe_link_dais(struct snd_soc_card *card)
1677{
1678 struct snd_soc_pcm_runtime *rtd;
1679 int order, ret;
1680
1681 for_each_comp_order(order) {
1682 for_each_card_rtds(card, rtd) {
1683 /* probe all rtd connected DAIs in good order */
1684 ret = snd_soc_pcm_dai_probe(rtd, order);
1685 if (ret)
1686 return ret;
1687 }
1688 }
1689
1690 return 0;
1691}
1692
1693static void soc_remove_link_components(struct snd_soc_card *card)
1694{
1695 struct snd_soc_component *component;
1696 struct snd_soc_pcm_runtime *rtd;
1697 int i, order;
1698
1699 for_each_comp_order(order) {
1700 for_each_card_rtds(card, rtd) {
1701 for_each_rtd_components(rtd, i, component) {
1702 if (component->driver->remove_order != order)
1703 continue;
1704
1705 soc_remove_component(component, 1);
1706 }
1707 }
1708 }
1709}
1710
1711static int soc_probe_link_components(struct snd_soc_card *card)
1712{
1713 struct snd_soc_component *component;
1714 struct snd_soc_pcm_runtime *rtd;
1715 int i, ret, order;
1716
1717 for_each_comp_order(order) {
1718 for_each_card_rtds(card, rtd) {
1719 for_each_rtd_components(rtd, i, component) {
1720 if (component->driver->probe_order != order)
1721 continue;
1722
1723 ret = soc_probe_component(card, component);
1724 if (ret < 0)
1725 return ret;
1726 }
1727 }
1728 }
1729
1730 return 0;
1731}
1732
1733static void soc_unbind_aux_dev(struct snd_soc_card *card)
1734{
1735 struct snd_soc_component *component, *_component;
1736
1737 for_each_card_auxs_safe(card, component, _component) {
1738 /* for snd_soc_component_init() */
1739 snd_soc_component_set_aux(component, NULL);
1740 list_del(&component->card_aux_list);
1741 }
1742}
1743
1744static int soc_bind_aux_dev(struct snd_soc_card *card)
1745{
1746 struct snd_soc_component *component;
1747 struct snd_soc_aux_dev *aux;
1748 int i;
1749
1750 for_each_card_pre_auxs(card, i, aux) {
1751 /* codecs, usually analog devices */
1752 component = soc_find_component(&aux->dlc);
1753 if (!component)
1754 return -EPROBE_DEFER;
1755
1756 /* for snd_soc_component_init() */
1757 snd_soc_component_set_aux(component, aux);
1758 /* see for_each_card_auxs */
1759 list_add(&component->card_aux_list, &card->aux_comp_list);
1760 }
1761 return 0;
1762}
1763
1764static int soc_probe_aux_devices(struct snd_soc_card *card)
1765{
1766 struct snd_soc_component *component;
1767 int order;
1768 int ret;
1769
1770 for_each_comp_order(order) {
1771 for_each_card_auxs(card, component) {
1772 if (component->driver->probe_order != order)
1773 continue;
1774
1775 ret = soc_probe_component(card, component);
1776 if (ret < 0)
1777 return ret;
1778 }
1779 }
1780
1781 return 0;
1782}
1783
1784static void soc_remove_aux_devices(struct snd_soc_card *card)
1785{
1786 struct snd_soc_component *comp, *_comp;
1787 int order;
1788
1789 for_each_comp_order(order) {
1790 for_each_card_auxs_safe(card, comp, _comp) {
1791 if (comp->driver->remove_order == order)
1792 soc_remove_component(comp, 1);
1793 }
1794 }
1795}
1796
1797#ifdef CONFIG_DMI
1798/*
1799 * If a DMI filed contain strings in this blacklist (e.g.
1800 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1801 * as invalid and dropped when setting the card long name from DMI info.
1802 */
1803static const char * const dmi_blacklist[] = {
1804 "To be filled by OEM",
1805 "TBD by OEM",
1806 "Default String",
1807 "Board Manufacturer",
1808 "Board Vendor Name",
1809 "Board Product Name",
1810 NULL, /* terminator */
1811};
1812
1813/*
1814 * Trim special characters, and replace '-' with '_' since '-' is used to
1815 * separate different DMI fields in the card long name. Only number and
1816 * alphabet characters and a few separator characters are kept.
1817 */
1818static void cleanup_dmi_name(char *name)
1819{
1820 int i, j = 0;
1821
1822 for (i = 0; name[i]; i++) {
1823 if (isalnum(name[i]) || (name[i] == '.')
1824 || (name[i] == '_'))
1825 name[j++] = name[i];
1826 else if (name[i] == '-')
1827 name[j++] = '_';
1828 }
1829
1830 name[j] = '\0';
1831}
1832
1833/*
1834 * Check if a DMI field is valid, i.e. not containing any string
1835 * in the black list.
1836 */
1837static int is_dmi_valid(const char *field)
1838{
1839 int i = 0;
1840
1841 while (dmi_blacklist[i]) {
1842 if (strstr(field, dmi_blacklist[i]))
1843 return 0;
1844 i++;
1845 }
1846
1847 return 1;
1848}
1849
1850/*
1851 * Append a string to card->dmi_longname with character cleanups.
1852 */
1853static void append_dmi_string(struct snd_soc_card *card, const char *str)
1854{
1855 char *dst = card->dmi_longname;
1856 size_t dst_len = sizeof(card->dmi_longname);
1857 size_t len;
1858
1859 len = strlen(dst);
1860 snprintf(dst + len, dst_len - len, "-%s", str);
1861
1862 len++; /* skip the separator "-" */
1863 if (len < dst_len)
1864 cleanup_dmi_name(dst + len);
1865}
1866
1867/**
1868 * snd_soc_set_dmi_name() - Register DMI names to card
1869 * @card: The card to register DMI names
1870 * @flavour: The flavour "differentiator" for the card amongst its peers.
1871 *
1872 * An Intel machine driver may be used by many different devices but are
1873 * difficult for userspace to differentiate, since machine drivers usually
1874 * use their own name as the card short name and leave the card long name
1875 * blank. To differentiate such devices and fix bugs due to lack of
1876 * device-specific configurations, this function allows DMI info to be used
1877 * as the sound card long name, in the format of
1878 * "vendor-product-version-board"
1879 * (Character '-' is used to separate different DMI fields here).
1880 * This will help the user space to load the device-specific Use Case Manager
1881 * (UCM) configurations for the card.
1882 *
1883 * Possible card long names may be:
1884 * DellInc.-XPS139343-01-0310JH
1885 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1886 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1887 *
1888 * This function also supports flavoring the card longname to provide
1889 * the extra differentiation, like "vendor-product-version-board-flavor".
1890 *
1891 * We only keep number and alphabet characters and a few separator characters
1892 * in the card long name since UCM in the user space uses the card long names
1893 * as card configuration directory names and AudoConf cannot support special
1894 * characters like SPACE.
1895 *
1896 * Returns 0 on success, otherwise a negative error code.
1897 */
1898int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1899{
1900 const char *vendor, *product, *board;
1901
1902 if (card->long_name)
1903 return 0; /* long name already set by driver or from DMI */
1904
1905 if (!dmi_available)
1906 return 0;
1907
1908 /* make up dmi long name as: vendor-product-version-board */
1909 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1910 if (!vendor || !is_dmi_valid(vendor)) {
1911 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1912 return 0;
1913 }
1914
1915 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1916 cleanup_dmi_name(card->dmi_longname);
1917
1918 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1919 if (product && is_dmi_valid(product)) {
1920 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1921
1922 append_dmi_string(card, product);
1923
1924 /*
1925 * some vendors like Lenovo may only put a self-explanatory
1926 * name in the product version field
1927 */
1928 if (product_version && is_dmi_valid(product_version))
1929 append_dmi_string(card, product_version);
1930 }
1931
1932 board = dmi_get_system_info(DMI_BOARD_NAME);
1933 if (board && is_dmi_valid(board)) {
1934 if (!product || strcasecmp(board, product))
1935 append_dmi_string(card, board);
1936 } else if (!product) {
1937 /* fall back to using legacy name */
1938 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1939 return 0;
1940 }
1941
1942 /* Add flavour to dmi long name */
1943 if (flavour)
1944 append_dmi_string(card, flavour);
1945
1946 /* set the card long name */
1947 card->long_name = card->dmi_longname;
1948
1949 return 0;
1950}
1951EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1952#endif /* CONFIG_DMI */
1953
1954static void soc_check_tplg_fes(struct snd_soc_card *card)
1955{
1956 struct snd_soc_component *component;
1957 const struct snd_soc_component_driver *comp_drv;
1958 struct snd_soc_dai_link *dai_link;
1959 int i;
1960
1961 for_each_component(component) {
1962
1963 /* does this component override BEs ? */
1964 if (!component->driver->ignore_machine)
1965 continue;
1966
1967 /* for this machine ? */
1968 if (!strcmp(component->driver->ignore_machine,
1969 card->dev->driver->name))
1970 goto match;
1971 if (strcmp(component->driver->ignore_machine,
1972 dev_name(card->dev)))
1973 continue;
1974match:
1975 /* machine matches, so override the rtd data */
1976 for_each_card_prelinks(card, i, dai_link) {
1977
1978 /* ignore this FE */
1979 if (dai_link->dynamic) {
1980 dai_link->ignore = true;
1981 continue;
1982 }
1983
1984 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1985 card->dai_link[i].name);
1986
1987 /* override platform component */
1988 if (!dai_link->platforms) {
1989 dev_err(card->dev, "init platform error");
1990 continue;
1991 }
1992
1993 if (component->dev->of_node)
1994 dai_link->platforms->of_node = component->dev->of_node;
1995 else
1996 dai_link->platforms->name = component->name;
1997
1998 /* convert non BE into BE */
1999 if (!dai_link->no_pcm) {
2000 dai_link->no_pcm = 1;
2001
2002 if (dai_link->dpcm_playback)
2003 dev_warn(card->dev,
2004 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2005 dai_link->name);
2006 if (dai_link->dpcm_capture)
2007 dev_warn(card->dev,
2008 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
2009 dai_link->name);
2010
2011 /* convert normal link into DPCM one */
2012 if (!(dai_link->dpcm_playback ||
2013 dai_link->dpcm_capture)) {
2014 dai_link->dpcm_playback = !dai_link->capture_only;
2015 dai_link->dpcm_capture = !dai_link->playback_only;
2016 }
2017 }
2018
2019 /*
2020 * override any BE fixups
2021 * see
2022 * snd_soc_link_be_hw_params_fixup()
2023 */
2024 dai_link->be_hw_params_fixup =
2025 component->driver->be_hw_params_fixup;
2026
2027 /*
2028 * most BE links don't set stream name, so set it to
2029 * dai link name if it's NULL to help bind widgets.
2030 */
2031 if (!dai_link->stream_name)
2032 dai_link->stream_name = dai_link->name;
2033 }
2034
2035 /* Inform userspace we are using alternate topology */
2036 if (component->driver->topology_name_prefix) {
2037
2038 /* topology shortname created? */
2039 if (!card->topology_shortname_created) {
2040 comp_drv = component->driver;
2041
2042 snprintf(card->topology_shortname, 32, "%s-%s",
2043 comp_drv->topology_name_prefix,
2044 card->name);
2045 card->topology_shortname_created = true;
2046 }
2047
2048 /* use topology shortname */
2049 card->name = card->topology_shortname;
2050 }
2051 }
2052}
2053
2054#define soc_setup_card_name(card, name, name1, name2) \
2055 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2056static void __soc_setup_card_name(struct snd_soc_card *card,
2057 char *name, int len,
2058 const char *name1, const char *name2)
2059{
2060 const char *src = name1 ? name1 : name2;
2061 int i;
2062
2063 snprintf(name, len, "%s", src);
2064
2065 if (name != card->snd_card->driver)
2066 return;
2067
2068 /*
2069 * Name normalization (driver field)
2070 *
2071 * The driver name is somewhat special, as it's used as a key for
2072 * searches in the user-space.
2073 *
2074 * ex)
2075 * "abcd??efg" -> "abcd__efg"
2076 */
2077 for (i = 0; i < len; i++) {
2078 switch (name[i]) {
2079 case '_':
2080 case '-':
2081 case '\0':
2082 break;
2083 default:
2084 if (!isalnum(name[i]))
2085 name[i] = '_';
2086 break;
2087 }
2088 }
2089
2090 /*
2091 * The driver field should contain a valid string from the user view.
2092 * The wrapping usually does not work so well here. Set a smaller string
2093 * in the specific ASoC driver.
2094 */
2095 if (strlen(src) > len - 1)
2096 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2097}
2098
2099static void soc_cleanup_card_resources(struct snd_soc_card *card)
2100{
2101 struct snd_soc_pcm_runtime *rtd, *n;
2102
2103 if (card->snd_card)
2104 snd_card_disconnect_sync(card->snd_card);
2105
2106 snd_soc_dapm_shutdown(card);
2107
2108 /* release machine specific resources */
2109 for_each_card_rtds(card, rtd)
2110 if (rtd->initialized)
2111 snd_soc_link_exit(rtd);
2112 /* remove and free each DAI */
2113 soc_remove_link_dais(card);
2114 soc_remove_link_components(card);
2115
2116 for_each_card_rtds_safe(card, rtd, n)
2117 snd_soc_remove_pcm_runtime(card, rtd);
2118
2119 /* remove auxiliary devices */
2120 soc_remove_aux_devices(card);
2121 soc_unbind_aux_dev(card);
2122
2123 snd_soc_dapm_free(&card->dapm);
2124 soc_cleanup_card_debugfs(card);
2125
2126 /* remove the card */
2127 snd_soc_card_remove(card);
2128
2129 if (card->snd_card) {
2130 snd_card_free(card->snd_card);
2131 card->snd_card = NULL;
2132 }
2133}
2134
2135static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2136{
2137 if (snd_soc_card_is_instantiated(card)) {
2138 card->instantiated = false;
2139 snd_soc_flush_all_delayed_work(card);
2140
2141 soc_cleanup_card_resources(card);
2142 if (!unregister)
2143 list_add(&card->list, &unbind_card_list);
2144 } else {
2145 if (unregister)
2146 list_del(&card->list);
2147 }
2148}
2149
2150static int snd_soc_bind_card(struct snd_soc_card *card)
2151{
2152 struct snd_soc_pcm_runtime *rtd;
2153 struct snd_soc_component *component;
2154 int ret;
2155
2156 mutex_lock(&client_mutex);
2157 snd_soc_card_mutex_lock_root(card);
2158
2159 snd_soc_fill_dummy_dai(card);
2160
2161 snd_soc_dapm_init(&card->dapm, card, NULL);
2162
2163 /* check whether any platform is ignore machine FE and using topology */
2164 soc_check_tplg_fes(card);
2165
2166 /* bind aux_devs too */
2167 ret = soc_bind_aux_dev(card);
2168 if (ret < 0)
2169 goto probe_end;
2170
2171 /* add predefined DAI links to the list */
2172 card->num_rtd = 0;
2173 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2174 if (ret < 0)
2175 goto probe_end;
2176
2177 /* card bind complete so register a sound card */
2178 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2179 card->owner, 0, &card->snd_card);
2180 if (ret < 0) {
2181 dev_err(card->dev,
2182 "ASoC: can't create sound card for card %s: %d\n",
2183 card->name, ret);
2184 goto probe_end;
2185 }
2186
2187 soc_init_card_debugfs(card);
2188
2189 soc_resume_init(card);
2190
2191 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2192 card->num_dapm_widgets);
2193 if (ret < 0)
2194 goto probe_end;
2195
2196 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2197 card->num_of_dapm_widgets);
2198 if (ret < 0)
2199 goto probe_end;
2200
2201 /* initialise the sound card only once */
2202 ret = snd_soc_card_probe(card);
2203 if (ret < 0)
2204 goto probe_end;
2205
2206 /* probe all components used by DAI links on this card */
2207 ret = soc_probe_link_components(card);
2208 if (ret < 0) {
2209 if (ret != -EPROBE_DEFER) {
2210 dev_err(card->dev,
2211 "ASoC: failed to instantiate card %d\n", ret);
2212 }
2213 goto probe_end;
2214 }
2215
2216 /* probe auxiliary components */
2217 ret = soc_probe_aux_devices(card);
2218 if (ret < 0) {
2219 dev_err(card->dev,
2220 "ASoC: failed to probe aux component %d\n", ret);
2221 goto probe_end;
2222 }
2223
2224 /* probe all DAI links on this card */
2225 ret = soc_probe_link_dais(card);
2226 if (ret < 0) {
2227 dev_err(card->dev,
2228 "ASoC: failed to instantiate card %d\n", ret);
2229 goto probe_end;
2230 }
2231
2232 for_each_card_rtds(card, rtd) {
2233 ret = soc_init_pcm_runtime(card, rtd);
2234 if (ret < 0)
2235 goto probe_end;
2236 }
2237
2238 snd_soc_dapm_link_dai_widgets(card);
2239 snd_soc_dapm_connect_dai_link_widgets(card);
2240
2241 ret = snd_soc_add_card_controls(card, card->controls,
2242 card->num_controls);
2243 if (ret < 0)
2244 goto probe_end;
2245
2246 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2247 card->num_dapm_routes);
2248 if (ret < 0) {
2249 if (card->disable_route_checks) {
2250 dev_info(card->dev,
2251 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2252 __func__);
2253 } else {
2254 dev_err(card->dev,
2255 "%s: snd_soc_dapm_add_routes failed: %d\n",
2256 __func__, ret);
2257 goto probe_end;
2258 }
2259 }
2260
2261 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2262 card->num_of_dapm_routes);
2263 if (ret < 0)
2264 goto probe_end;
2265
2266 /* try to set some sane longname if DMI is available */
2267 snd_soc_set_dmi_name(card, NULL);
2268
2269 soc_setup_card_name(card, card->snd_card->shortname,
2270 card->name, NULL);
2271 soc_setup_card_name(card, card->snd_card->longname,
2272 card->long_name, card->name);
2273 soc_setup_card_name(card, card->snd_card->driver,
2274 card->driver_name, card->name);
2275
2276 if (card->components) {
2277 /* the current implementation of snd_component_add() accepts */
2278 /* multiple components in the string separated by space, */
2279 /* but the string collision (identical string) check might */
2280 /* not work correctly */
2281 ret = snd_component_add(card->snd_card, card->components);
2282 if (ret < 0) {
2283 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2284 card->name, ret);
2285 goto probe_end;
2286 }
2287 }
2288
2289 ret = snd_soc_card_late_probe(card);
2290 if (ret < 0)
2291 goto probe_end;
2292
2293 snd_soc_dapm_new_widgets(card);
2294 snd_soc_card_fixup_controls(card);
2295
2296 ret = snd_card_register(card->snd_card);
2297 if (ret < 0) {
2298 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2299 ret);
2300 goto probe_end;
2301 }
2302
2303 card->instantiated = 1;
2304 dapm_mark_endpoints_dirty(card);
2305 snd_soc_dapm_sync(&card->dapm);
2306
2307 /* deactivate pins to sleep state */
2308 for_each_card_components(card, component)
2309 if (!snd_soc_component_active(component))
2310 pinctrl_pm_select_sleep_state(component->dev);
2311
2312probe_end:
2313 if (ret < 0)
2314 soc_cleanup_card_resources(card);
2315
2316 snd_soc_card_mutex_unlock(card);
2317 mutex_unlock(&client_mutex);
2318
2319 return ret;
2320}
2321
2322/* probes a new socdev */
2323static int soc_probe(struct platform_device *pdev)
2324{
2325 struct snd_soc_card *card = platform_get_drvdata(pdev);
2326
2327 /*
2328 * no card, so machine driver should be registering card
2329 * we should not be here in that case so ret error
2330 */
2331 if (!card)
2332 return -EINVAL;
2333
2334 dev_warn(&pdev->dev,
2335 "ASoC: machine %s should use snd_soc_register_card()\n",
2336 card->name);
2337
2338 /* Bodge while we unpick instantiation */
2339 card->dev = &pdev->dev;
2340
2341 return devm_snd_soc_register_card(&pdev->dev, card);
2342}
2343
2344int snd_soc_poweroff(struct device *dev)
2345{
2346 struct snd_soc_card *card = dev_get_drvdata(dev);
2347 struct snd_soc_component *component;
2348
2349 if (!snd_soc_card_is_instantiated(card))
2350 return 0;
2351
2352 /*
2353 * Flush out pmdown_time work - we actually do want to run it
2354 * now, we're shutting down so no imminent restart.
2355 */
2356 snd_soc_flush_all_delayed_work(card);
2357
2358 snd_soc_dapm_shutdown(card);
2359
2360 /* deactivate pins to sleep state */
2361 for_each_card_components(card, component)
2362 pinctrl_pm_select_sleep_state(component->dev);
2363
2364 return 0;
2365}
2366EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2367
2368const struct dev_pm_ops snd_soc_pm_ops = {
2369 .suspend = snd_soc_suspend,
2370 .resume = snd_soc_resume,
2371 .freeze = snd_soc_suspend,
2372 .thaw = snd_soc_resume,
2373 .poweroff = snd_soc_poweroff,
2374 .restore = snd_soc_resume,
2375};
2376EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2377
2378/* ASoC platform driver */
2379static struct platform_driver soc_driver = {
2380 .driver = {
2381 .name = "soc-audio",
2382 .pm = &snd_soc_pm_ops,
2383 },
2384 .probe = soc_probe,
2385};
2386
2387/**
2388 * snd_soc_cnew - create new control
2389 * @_template: control template
2390 * @data: control private data
2391 * @long_name: control long name
2392 * @prefix: control name prefix
2393 *
2394 * Create a new mixer control from a template control.
2395 *
2396 * Returns 0 for success, else error.
2397 */
2398struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2399 void *data, const char *long_name,
2400 const char *prefix)
2401{
2402 struct snd_kcontrol_new template;
2403 struct snd_kcontrol *kcontrol;
2404 char *name = NULL;
2405
2406 memcpy(&template, _template, sizeof(template));
2407 template.index = 0;
2408
2409 if (!long_name)
2410 long_name = template.name;
2411
2412 if (prefix) {
2413 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2414 if (!name)
2415 return NULL;
2416
2417 template.name = name;
2418 } else {
2419 template.name = long_name;
2420 }
2421
2422 kcontrol = snd_ctl_new1(&template, data);
2423
2424 kfree(name);
2425
2426 return kcontrol;
2427}
2428EXPORT_SYMBOL_GPL(snd_soc_cnew);
2429
2430static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2431 const struct snd_kcontrol_new *controls, int num_controls,
2432 const char *prefix, void *data)
2433{
2434 int i;
2435
2436 for (i = 0; i < num_controls; i++) {
2437 const struct snd_kcontrol_new *control = &controls[i];
2438 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2439 control->name, prefix));
2440 if (err < 0) {
2441 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2442 control->name, err);
2443 return err;
2444 }
2445 }
2446
2447 return 0;
2448}
2449
2450/**
2451 * snd_soc_add_component_controls - Add an array of controls to a component.
2452 *
2453 * @component: Component to add controls to
2454 * @controls: Array of controls to add
2455 * @num_controls: Number of elements in the array
2456 *
2457 * Return: 0 for success, else error.
2458 */
2459int snd_soc_add_component_controls(struct snd_soc_component *component,
2460 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2461{
2462 struct snd_card *card = component->card->snd_card;
2463
2464 return snd_soc_add_controls(card, component->dev, controls,
2465 num_controls, component->name_prefix, component);
2466}
2467EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2468
2469/**
2470 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2471 * Convenience function to add a list of controls.
2472 *
2473 * @soc_card: SoC card to add controls to
2474 * @controls: array of controls to add
2475 * @num_controls: number of elements in the array
2476 *
2477 * Return 0 for success, else error.
2478 */
2479int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2480 const struct snd_kcontrol_new *controls, int num_controls)
2481{
2482 struct snd_card *card = soc_card->snd_card;
2483
2484 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2485 NULL, soc_card);
2486}
2487EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2488
2489/**
2490 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2491 * Convenience function to add a list of controls.
2492 *
2493 * @dai: DAI to add controls to
2494 * @controls: array of controls to add
2495 * @num_controls: number of elements in the array
2496 *
2497 * Return 0 for success, else error.
2498 */
2499int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2500 const struct snd_kcontrol_new *controls, int num_controls)
2501{
2502 struct snd_card *card = dai->component->card->snd_card;
2503
2504 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2505 NULL, dai);
2506}
2507EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2508
2509/**
2510 * snd_soc_register_card - Register a card with the ASoC core
2511 *
2512 * @card: Card to register
2513 *
2514 */
2515int snd_soc_register_card(struct snd_soc_card *card)
2516{
2517 if (!card->name || !card->dev)
2518 return -EINVAL;
2519
2520 dev_set_drvdata(card->dev, card);
2521
2522 INIT_LIST_HEAD(&card->widgets);
2523 INIT_LIST_HEAD(&card->paths);
2524 INIT_LIST_HEAD(&card->dapm_list);
2525 INIT_LIST_HEAD(&card->aux_comp_list);
2526 INIT_LIST_HEAD(&card->component_dev_list);
2527 INIT_LIST_HEAD(&card->list);
2528 INIT_LIST_HEAD(&card->rtd_list);
2529 INIT_LIST_HEAD(&card->dapm_dirty);
2530 INIT_LIST_HEAD(&card->dobj_list);
2531
2532 card->instantiated = 0;
2533 mutex_init(&card->mutex);
2534 mutex_init(&card->dapm_mutex);
2535 mutex_init(&card->pcm_mutex);
2536
2537 return snd_soc_bind_card(card);
2538}
2539EXPORT_SYMBOL_GPL(snd_soc_register_card);
2540
2541/**
2542 * snd_soc_unregister_card - Unregister a card with the ASoC core
2543 *
2544 * @card: Card to unregister
2545 *
2546 */
2547void snd_soc_unregister_card(struct snd_soc_card *card)
2548{
2549 mutex_lock(&client_mutex);
2550 snd_soc_unbind_card(card, true);
2551 mutex_unlock(&client_mutex);
2552 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2553}
2554EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2555
2556/*
2557 * Simplify DAI link configuration by removing ".-1" from device names
2558 * and sanitizing names.
2559 */
2560static char *fmt_single_name(struct device *dev, int *id)
2561{
2562 const char *devname = dev_name(dev);
2563 char *found, *name;
2564 unsigned int id1, id2;
2565
2566 if (devname == NULL)
2567 return NULL;
2568
2569 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2570 if (!name)
2571 return NULL;
2572
2573 /* are we a "%s.%d" name (platform and SPI components) */
2574 found = strstr(name, dev->driver->name);
2575 if (found) {
2576 /* get ID */
2577 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2578
2579 /* discard ID from name if ID == -1 */
2580 if (*id == -1)
2581 found[strlen(dev->driver->name)] = '\0';
2582 }
2583
2584 /* I2C component devices are named "bus-addr" */
2585 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2586
2587 /* create unique ID number from I2C addr and bus */
2588 *id = ((id1 & 0xffff) << 16) + id2;
2589
2590 devm_kfree(dev, name);
2591
2592 /* sanitize component name for DAI link creation */
2593 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2594 } else {
2595 *id = 0;
2596 }
2597
2598 return name;
2599}
2600
2601/*
2602 * Simplify DAI link naming for single devices with multiple DAIs by removing
2603 * any ".-1" and using the DAI name (instead of device name).
2604 */
2605static inline char *fmt_multiple_name(struct device *dev,
2606 struct snd_soc_dai_driver *dai_drv)
2607{
2608 if (dai_drv->name == NULL) {
2609 dev_err(dev,
2610 "ASoC: error - multiple DAI %s registered with no name\n",
2611 dev_name(dev));
2612 return NULL;
2613 }
2614
2615 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2616}
2617
2618void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2619{
2620 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2621 list_del(&dai->list);
2622}
2623EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2624
2625/**
2626 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2627 *
2628 * @component: The component the DAIs are registered for
2629 * @dai_drv: DAI driver to use for the DAI
2630 * @legacy_dai_naming: if %true, use legacy single-name format;
2631 * if %false, use multiple-name format;
2632 *
2633 * Topology can use this API to register DAIs when probing a component.
2634 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2635 * will be freed in the component cleanup.
2636 */
2637struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2638 struct snd_soc_dai_driver *dai_drv,
2639 bool legacy_dai_naming)
2640{
2641 struct device *dev = component->dev;
2642 struct snd_soc_dai *dai;
2643
2644 lockdep_assert_held(&client_mutex);
2645
2646 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2647 if (dai == NULL)
2648 return NULL;
2649
2650 /*
2651 * Back in the old days when we still had component-less DAIs,
2652 * instead of having a static name, component-less DAIs would
2653 * inherit the name of the parent device so it is possible to
2654 * register multiple instances of the DAI. We still need to keep
2655 * the same naming style even though those DAIs are not
2656 * component-less anymore.
2657 */
2658 if (legacy_dai_naming &&
2659 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2660 dai->name = fmt_single_name(dev, &dai->id);
2661 } else {
2662 dai->name = fmt_multiple_name(dev, dai_drv);
2663 if (dai_drv->id)
2664 dai->id = dai_drv->id;
2665 else
2666 dai->id = component->num_dai;
2667 }
2668 if (!dai->name)
2669 return NULL;
2670
2671 dai->component = component;
2672 dai->dev = dev;
2673 dai->driver = dai_drv;
2674
2675 /* see for_each_component_dais */
2676 list_add_tail(&dai->list, &component->dai_list);
2677 component->num_dai++;
2678
2679 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2680 return dai;
2681}
2682EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2683
2684/**
2685 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2686 *
2687 * @component: The component for which the DAIs should be unregistered
2688 */
2689static void snd_soc_unregister_dais(struct snd_soc_component *component)
2690{
2691 struct snd_soc_dai *dai, *_dai;
2692
2693 for_each_component_dais_safe(component, dai, _dai)
2694 snd_soc_unregister_dai(dai);
2695}
2696
2697/**
2698 * snd_soc_register_dais - Register a DAI with the ASoC core
2699 *
2700 * @component: The component the DAIs are registered for
2701 * @dai_drv: DAI driver to use for the DAIs
2702 * @count: Number of DAIs
2703 */
2704static int snd_soc_register_dais(struct snd_soc_component *component,
2705 struct snd_soc_dai_driver *dai_drv,
2706 size_t count)
2707{
2708 struct snd_soc_dai *dai;
2709 unsigned int i;
2710 int ret;
2711
2712 for (i = 0; i < count; i++) {
2713 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2714 component->driver->legacy_dai_naming);
2715 if (dai == NULL) {
2716 ret = -ENOMEM;
2717 goto err;
2718 }
2719 }
2720
2721 return 0;
2722
2723err:
2724 snd_soc_unregister_dais(component);
2725
2726 return ret;
2727}
2728
2729#define ENDIANNESS_MAP(name) \
2730 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2731static u64 endianness_format_map[] = {
2732 ENDIANNESS_MAP(S16_),
2733 ENDIANNESS_MAP(U16_),
2734 ENDIANNESS_MAP(S24_),
2735 ENDIANNESS_MAP(U24_),
2736 ENDIANNESS_MAP(S32_),
2737 ENDIANNESS_MAP(U32_),
2738 ENDIANNESS_MAP(S24_3),
2739 ENDIANNESS_MAP(U24_3),
2740 ENDIANNESS_MAP(S20_3),
2741 ENDIANNESS_MAP(U20_3),
2742 ENDIANNESS_MAP(S18_3),
2743 ENDIANNESS_MAP(U18_3),
2744 ENDIANNESS_MAP(FLOAT_),
2745 ENDIANNESS_MAP(FLOAT64_),
2746 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2747};
2748
2749/*
2750 * Fix up the DAI formats for endianness: codecs don't actually see
2751 * the endianness of the data but we're using the CPU format
2752 * definitions which do need to include endianness so we ensure that
2753 * codec DAIs always have both big and little endian variants set.
2754 */
2755static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2756{
2757 int i;
2758
2759 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2760 if (stream->formats & endianness_format_map[i])
2761 stream->formats |= endianness_format_map[i];
2762}
2763
2764static void snd_soc_try_rebind_card(void)
2765{
2766 struct snd_soc_card *card, *c;
2767
2768 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2769 if (!snd_soc_bind_card(card))
2770 list_del(&card->list);
2771}
2772
2773static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2774{
2775 struct snd_soc_card *card = component->card;
2776
2777 snd_soc_unregister_dais(component);
2778
2779 if (card)
2780 snd_soc_unbind_card(card, false);
2781
2782 list_del(&component->list);
2783}
2784
2785int snd_soc_component_initialize(struct snd_soc_component *component,
2786 const struct snd_soc_component_driver *driver,
2787 struct device *dev)
2788{
2789 INIT_LIST_HEAD(&component->dai_list);
2790 INIT_LIST_HEAD(&component->dobj_list);
2791 INIT_LIST_HEAD(&component->card_list);
2792 INIT_LIST_HEAD(&component->list);
2793 mutex_init(&component->io_mutex);
2794
2795 component->name = fmt_single_name(dev, &component->id);
2796 if (!component->name) {
2797 dev_err(dev, "ASoC: Failed to allocate name\n");
2798 return -ENOMEM;
2799 }
2800
2801 component->dev = dev;
2802 component->driver = driver;
2803
2804#ifdef CONFIG_DEBUG_FS
2805 if (!component->debugfs_prefix)
2806 component->debugfs_prefix = driver->debugfs_prefix;
2807#endif
2808
2809 return 0;
2810}
2811EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2812
2813int snd_soc_add_component(struct snd_soc_component *component,
2814 struct snd_soc_dai_driver *dai_drv,
2815 int num_dai)
2816{
2817 int ret;
2818 int i;
2819
2820 mutex_lock(&client_mutex);
2821
2822 if (component->driver->endianness) {
2823 for (i = 0; i < num_dai; i++) {
2824 convert_endianness_formats(&dai_drv[i].playback);
2825 convert_endianness_formats(&dai_drv[i].capture);
2826 }
2827 }
2828
2829 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2830 if (ret < 0) {
2831 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2832 ret);
2833 goto err_cleanup;
2834 }
2835
2836 if (!component->driver->write && !component->driver->read) {
2837 if (!component->regmap)
2838 component->regmap = dev_get_regmap(component->dev,
2839 NULL);
2840 if (component->regmap)
2841 snd_soc_component_setup_regmap(component);
2842 }
2843
2844 /* see for_each_component */
2845 list_add(&component->list, &component_list);
2846
2847err_cleanup:
2848 if (ret < 0)
2849 snd_soc_del_component_unlocked(component);
2850
2851 mutex_unlock(&client_mutex);
2852
2853 if (ret == 0)
2854 snd_soc_try_rebind_card();
2855
2856 return ret;
2857}
2858EXPORT_SYMBOL_GPL(snd_soc_add_component);
2859
2860int snd_soc_register_component(struct device *dev,
2861 const struct snd_soc_component_driver *component_driver,
2862 struct snd_soc_dai_driver *dai_drv,
2863 int num_dai)
2864{
2865 struct snd_soc_component *component;
2866 int ret;
2867
2868 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2869 if (!component)
2870 return -ENOMEM;
2871
2872 ret = snd_soc_component_initialize(component, component_driver, dev);
2873 if (ret < 0)
2874 return ret;
2875
2876 return snd_soc_add_component(component, dai_drv, num_dai);
2877}
2878EXPORT_SYMBOL_GPL(snd_soc_register_component);
2879
2880/**
2881 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2882 * from the ASoC core
2883 *
2884 * @dev: The device to unregister
2885 * @component_driver: The component driver to unregister
2886 */
2887void snd_soc_unregister_component_by_driver(struct device *dev,
2888 const struct snd_soc_component_driver *component_driver)
2889{
2890 struct snd_soc_component *component;
2891
2892 if (!component_driver)
2893 return;
2894
2895 mutex_lock(&client_mutex);
2896 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2897 if (!component)
2898 goto out;
2899
2900 snd_soc_del_component_unlocked(component);
2901
2902out:
2903 mutex_unlock(&client_mutex);
2904}
2905EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2906
2907/**
2908 * snd_soc_unregister_component - Unregister all related component
2909 * from the ASoC core
2910 *
2911 * @dev: The device to unregister
2912 */
2913void snd_soc_unregister_component(struct device *dev)
2914{
2915 mutex_lock(&client_mutex);
2916 while (1) {
2917 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2918
2919 if (!component)
2920 break;
2921
2922 snd_soc_del_component_unlocked(component);
2923 }
2924 mutex_unlock(&client_mutex);
2925}
2926EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2927
2928/* Retrieve a card's name from device tree */
2929int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2930 const char *propname)
2931{
2932 struct device_node *np;
2933 int ret;
2934
2935 if (!card->dev) {
2936 pr_err("card->dev is not set before calling %s\n", __func__);
2937 return -EINVAL;
2938 }
2939
2940 np = card->dev->of_node;
2941
2942 ret = of_property_read_string_index(np, propname, 0, &card->name);
2943 /*
2944 * EINVAL means the property does not exist. This is fine providing
2945 * card->name was previously set, which is checked later in
2946 * snd_soc_register_card.
2947 */
2948 if (ret < 0 && ret != -EINVAL) {
2949 dev_err(card->dev,
2950 "ASoC: Property '%s' could not be read: %d\n",
2951 propname, ret);
2952 return ret;
2953 }
2954
2955 return 0;
2956}
2957EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2958
2959static const struct snd_soc_dapm_widget simple_widgets[] = {
2960 SND_SOC_DAPM_MIC("Microphone", NULL),
2961 SND_SOC_DAPM_LINE("Line", NULL),
2962 SND_SOC_DAPM_HP("Headphone", NULL),
2963 SND_SOC_DAPM_SPK("Speaker", NULL),
2964};
2965
2966int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2967 const char *propname)
2968{
2969 struct device_node *np = card->dev->of_node;
2970 struct snd_soc_dapm_widget *widgets;
2971 const char *template, *wname;
2972 int i, j, num_widgets;
2973
2974 num_widgets = of_property_count_strings(np, propname);
2975 if (num_widgets < 0) {
2976 dev_err(card->dev,
2977 "ASoC: Property '%s' does not exist\n", propname);
2978 return -EINVAL;
2979 }
2980 if (!num_widgets) {
2981 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2982 propname);
2983 return -EINVAL;
2984 }
2985 if (num_widgets & 1) {
2986 dev_err(card->dev,
2987 "ASoC: Property '%s' length is not even\n", propname);
2988 return -EINVAL;
2989 }
2990
2991 num_widgets /= 2;
2992
2993 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2994 GFP_KERNEL);
2995 if (!widgets) {
2996 dev_err(card->dev,
2997 "ASoC: Could not allocate memory for widgets\n");
2998 return -ENOMEM;
2999 }
3000
3001 for (i = 0; i < num_widgets; i++) {
3002 int ret = of_property_read_string_index(np, propname,
3003 2 * i, &template);
3004 if (ret) {
3005 dev_err(card->dev,
3006 "ASoC: Property '%s' index %d read error:%d\n",
3007 propname, 2 * i, ret);
3008 return -EINVAL;
3009 }
3010
3011 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3012 if (!strncmp(template, simple_widgets[j].name,
3013 strlen(simple_widgets[j].name))) {
3014 widgets[i] = simple_widgets[j];
3015 break;
3016 }
3017 }
3018
3019 if (j >= ARRAY_SIZE(simple_widgets)) {
3020 dev_err(card->dev,
3021 "ASoC: DAPM widget '%s' is not supported\n",
3022 template);
3023 return -EINVAL;
3024 }
3025
3026 ret = of_property_read_string_index(np, propname,
3027 (2 * i) + 1,
3028 &wname);
3029 if (ret) {
3030 dev_err(card->dev,
3031 "ASoC: Property '%s' index %d read error:%d\n",
3032 propname, (2 * i) + 1, ret);
3033 return -EINVAL;
3034 }
3035
3036 widgets[i].name = wname;
3037 }
3038
3039 card->of_dapm_widgets = widgets;
3040 card->num_of_dapm_widgets = num_widgets;
3041
3042 return 0;
3043}
3044EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3045
3046int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3047{
3048 const unsigned int nb_controls_max = 16;
3049 const char **strings, *control_name;
3050 struct snd_kcontrol_new *controls;
3051 struct device *dev = card->dev;
3052 unsigned int i, nb_controls;
3053 int ret;
3054
3055 if (!of_property_read_bool(dev->of_node, prop))
3056 return 0;
3057
3058 strings = devm_kcalloc(dev, nb_controls_max,
3059 sizeof(*strings), GFP_KERNEL);
3060 if (!strings)
3061 return -ENOMEM;
3062
3063 ret = of_property_read_string_array(dev->of_node, prop,
3064 strings, nb_controls_max);
3065 if (ret < 0)
3066 return ret;
3067
3068 nb_controls = (unsigned int)ret;
3069
3070 controls = devm_kcalloc(dev, nb_controls,
3071 sizeof(*controls), GFP_KERNEL);
3072 if (!controls)
3073 return -ENOMEM;
3074
3075 for (i = 0; i < nb_controls; i++) {
3076 control_name = devm_kasprintf(dev, GFP_KERNEL,
3077 "%s Switch", strings[i]);
3078 if (!control_name)
3079 return -ENOMEM;
3080
3081 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3082 controls[i].name = control_name;
3083 controls[i].info = snd_soc_dapm_info_pin_switch;
3084 controls[i].get = snd_soc_dapm_get_pin_switch;
3085 controls[i].put = snd_soc_dapm_put_pin_switch;
3086 controls[i].private_value = (unsigned long)strings[i];
3087 }
3088
3089 card->controls = controls;
3090 card->num_controls = nb_controls;
3091
3092 return 0;
3093}
3094EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3095
3096int snd_soc_of_get_slot_mask(struct device_node *np,
3097 const char *prop_name,
3098 unsigned int *mask)
3099{
3100 u32 val;
3101 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3102 int i;
3103
3104 if (!of_slot_mask)
3105 return 0;
3106 val /= sizeof(u32);
3107 for (i = 0; i < val; i++)
3108 if (be32_to_cpup(&of_slot_mask[i]))
3109 *mask |= (1 << i);
3110
3111 return val;
3112}
3113EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3114
3115int snd_soc_of_parse_tdm_slot(struct device_node *np,
3116 unsigned int *tx_mask,
3117 unsigned int *rx_mask,
3118 unsigned int *slots,
3119 unsigned int *slot_width)
3120{
3121 u32 val;
3122 int ret;
3123
3124 if (tx_mask)
3125 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3126 if (rx_mask)
3127 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3128
3129 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3130 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3131 if (ret)
3132 return ret;
3133
3134 if (slots)
3135 *slots = val;
3136 }
3137
3138 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3139 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3140 if (ret)
3141 return ret;
3142
3143 if (slot_width)
3144 *slot_width = val;
3145 }
3146
3147 return 0;
3148}
3149EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3150
3151void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3152 struct snd_soc_dai_link_component *cpus)
3153{
3154 platforms->of_node = cpus->of_node;
3155 platforms->dai_args = cpus->dai_args;
3156}
3157EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3158
3159void snd_soc_of_parse_node_prefix(struct device_node *np,
3160 struct snd_soc_codec_conf *codec_conf,
3161 struct device_node *of_node,
3162 const char *propname)
3163{
3164 const char *str;
3165 int ret;
3166
3167 ret = of_property_read_string(np, propname, &str);
3168 if (ret < 0) {
3169 /* no prefix is not error */
3170 return;
3171 }
3172
3173 codec_conf->dlc.of_node = of_node;
3174 codec_conf->name_prefix = str;
3175}
3176EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3177
3178int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3179 const char *propname)
3180{
3181 struct device_node *np = card->dev->of_node;
3182 int num_routes;
3183 struct snd_soc_dapm_route *routes;
3184 int i;
3185
3186 num_routes = of_property_count_strings(np, propname);
3187 if (num_routes < 0 || num_routes & 1) {
3188 dev_err(card->dev,
3189 "ASoC: Property '%s' does not exist or its length is not even\n",
3190 propname);
3191 return -EINVAL;
3192 }
3193 num_routes /= 2;
3194
3195 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3196 GFP_KERNEL);
3197 if (!routes) {
3198 dev_err(card->dev,
3199 "ASoC: Could not allocate DAPM route table\n");
3200 return -ENOMEM;
3201 }
3202
3203 for (i = 0; i < num_routes; i++) {
3204 int ret = of_property_read_string_index(np, propname,
3205 2 * i, &routes[i].sink);
3206 if (ret) {
3207 dev_err(card->dev,
3208 "ASoC: Property '%s' index %d could not be read: %d\n",
3209 propname, 2 * i, ret);
3210 return -EINVAL;
3211 }
3212 ret = of_property_read_string_index(np, propname,
3213 (2 * i) + 1, &routes[i].source);
3214 if (ret) {
3215 dev_err(card->dev,
3216 "ASoC: Property '%s' index %d could not be read: %d\n",
3217 propname, (2 * i) + 1, ret);
3218 return -EINVAL;
3219 }
3220 }
3221
3222 card->num_of_dapm_routes = num_routes;
3223 card->of_dapm_routes = routes;
3224
3225 return 0;
3226}
3227EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3228
3229int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3230{
3231 struct device_node *node = card->dev->of_node;
3232 struct snd_soc_aux_dev *aux;
3233 int num, i;
3234
3235 num = of_count_phandle_with_args(node, propname, NULL);
3236 if (num == -ENOENT) {
3237 return 0;
3238 } else if (num < 0) {
3239 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3240 propname, num);
3241 return num;
3242 }
3243
3244 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3245 if (!aux)
3246 return -ENOMEM;
3247 card->aux_dev = aux;
3248 card->num_aux_devs = num;
3249
3250 for_each_card_pre_auxs(card, i, aux) {
3251 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3252 if (!aux->dlc.of_node)
3253 return -EINVAL;
3254 }
3255
3256 return 0;
3257}
3258EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3259
3260unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3261{
3262 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3263
3264 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3265 case SND_SOC_DAIFMT_CBP_CFP:
3266 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3267 break;
3268 case SND_SOC_DAIFMT_CBP_CFC:
3269 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3270 break;
3271 case SND_SOC_DAIFMT_CBC_CFP:
3272 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3273 break;
3274 case SND_SOC_DAIFMT_CBC_CFC:
3275 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3276 break;
3277 }
3278
3279 return inv_dai_fmt;
3280}
3281EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3282
3283unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3284{
3285 /*
3286 * bit_frame is return value from
3287 * snd_soc_daifmt_parse_clock_provider_raw()
3288 */
3289
3290 /* Codec base */
3291 switch (bit_frame) {
3292 case 0x11:
3293 return SND_SOC_DAIFMT_CBP_CFP;
3294 case 0x10:
3295 return SND_SOC_DAIFMT_CBP_CFC;
3296 case 0x01:
3297 return SND_SOC_DAIFMT_CBC_CFP;
3298 default:
3299 return SND_SOC_DAIFMT_CBC_CFC;
3300 }
3301
3302 return 0;
3303}
3304EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3305
3306unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3307 const char *prefix)
3308{
3309 int ret;
3310 char prop[128];
3311 unsigned int format = 0;
3312 int bit, frame;
3313 const char *str;
3314 struct {
3315 char *name;
3316 unsigned int val;
3317 } of_fmt_table[] = {
3318 { "i2s", SND_SOC_DAIFMT_I2S },
3319 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3320 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3321 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3322 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3323 { "ac97", SND_SOC_DAIFMT_AC97 },
3324 { "pdm", SND_SOC_DAIFMT_PDM},
3325 { "msb", SND_SOC_DAIFMT_MSB },
3326 { "lsb", SND_SOC_DAIFMT_LSB },
3327 };
3328
3329 if (!prefix)
3330 prefix = "";
3331
3332 /*
3333 * check "dai-format = xxx"
3334 * or "[prefix]format = xxx"
3335 * SND_SOC_DAIFMT_FORMAT_MASK area
3336 */
3337 ret = of_property_read_string(np, "dai-format", &str);
3338 if (ret < 0) {
3339 snprintf(prop, sizeof(prop), "%sformat", prefix);
3340 ret = of_property_read_string(np, prop, &str);
3341 }
3342 if (ret == 0) {
3343 int i;
3344
3345 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3346 if (strcmp(str, of_fmt_table[i].name) == 0) {
3347 format |= of_fmt_table[i].val;
3348 break;
3349 }
3350 }
3351 }
3352
3353 /*
3354 * check "[prefix]continuous-clock"
3355 * SND_SOC_DAIFMT_CLOCK_MASK area
3356 */
3357 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3358 if (of_property_read_bool(np, prop))
3359 format |= SND_SOC_DAIFMT_CONT;
3360 else
3361 format |= SND_SOC_DAIFMT_GATED;
3362
3363 /*
3364 * check "[prefix]bitclock-inversion"
3365 * check "[prefix]frame-inversion"
3366 * SND_SOC_DAIFMT_INV_MASK area
3367 */
3368 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3369 bit = !!of_get_property(np, prop, NULL);
3370
3371 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3372 frame = !!of_get_property(np, prop, NULL);
3373
3374 switch ((bit << 4) + frame) {
3375 case 0x11:
3376 format |= SND_SOC_DAIFMT_IB_IF;
3377 break;
3378 case 0x10:
3379 format |= SND_SOC_DAIFMT_IB_NF;
3380 break;
3381 case 0x01:
3382 format |= SND_SOC_DAIFMT_NB_IF;
3383 break;
3384 default:
3385 /* SND_SOC_DAIFMT_NB_NF is default */
3386 break;
3387 }
3388
3389 return format;
3390}
3391EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3392
3393unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3394 const char *prefix,
3395 struct device_node **bitclkmaster,
3396 struct device_node **framemaster)
3397{
3398 char prop[128];
3399 unsigned int bit, frame;
3400
3401 if (!prefix)
3402 prefix = "";
3403
3404 /*
3405 * check "[prefix]bitclock-master"
3406 * check "[prefix]frame-master"
3407 */
3408 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3409 bit = !!of_get_property(np, prop, NULL);
3410 if (bit && bitclkmaster)
3411 *bitclkmaster = of_parse_phandle(np, prop, 0);
3412
3413 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3414 frame = !!of_get_property(np, prop, NULL);
3415 if (frame && framemaster)
3416 *framemaster = of_parse_phandle(np, prop, 0);
3417
3418 /*
3419 * return bitmap.
3420 * It will be parameter of
3421 * snd_soc_daifmt_clock_provider_from_bitmap()
3422 */
3423 return (bit << 4) + frame;
3424}
3425EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3426
3427int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3428{
3429 /*
3430 * [Normal]
3431 *
3432 * Playback
3433 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3434 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3435 *
3436 * Capture
3437 * CPU : SNDRV_PCM_STREAM_CAPTURE
3438 * Codec: SNDRV_PCM_STREAM_CAPTURE
3439 */
3440 if (!dai_link->c2c_params)
3441 return stream;
3442
3443 /*
3444 * [Codec2Codec]
3445 *
3446 * Playback
3447 * CPU : SNDRV_PCM_STREAM_CAPTURE
3448 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3449 *
3450 * Capture
3451 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3452 * Codec: SNDRV_PCM_STREAM_CAPTURE
3453 */
3454 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3455 return SNDRV_PCM_STREAM_PLAYBACK;
3456
3457 return SNDRV_PCM_STREAM_CAPTURE;
3458}
3459EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3460
3461int snd_soc_get_dai_id(struct device_node *ep)
3462{
3463 struct snd_soc_component *component;
3464 struct snd_soc_dai_link_component dlc = {
3465 .of_node = of_graph_get_port_parent(ep),
3466 };
3467 int ret;
3468
3469
3470 /*
3471 * For example HDMI case, HDMI has video/sound port,
3472 * but ALSA SoC needs sound port number only.
3473 * Thus counting HDMI DT port/endpoint doesn't work.
3474 * Then, it should have .of_xlate_dai_id
3475 */
3476 ret = -ENOTSUPP;
3477 mutex_lock(&client_mutex);
3478 component = soc_find_component(&dlc);
3479 if (component)
3480 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3481 mutex_unlock(&client_mutex);
3482
3483 of_node_put(dlc.of_node);
3484
3485 return ret;
3486}
3487EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3488
3489int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3490{
3491 struct snd_soc_component *pos;
3492 int ret = -EPROBE_DEFER;
3493
3494 mutex_lock(&client_mutex);
3495 for_each_component(pos) {
3496 struct device_node *component_of_node = soc_component_to_node(pos);
3497
3498 if (component_of_node != args->np || !pos->num_dai)
3499 continue;
3500
3501 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3502 if (ret == -ENOTSUPP) {
3503 struct snd_soc_dai *dai;
3504 int id = -1;
3505
3506 switch (args->args_count) {
3507 case 0:
3508 id = 0; /* same as dai_drv[0] */
3509 break;
3510 case 1:
3511 id = args->args[0];
3512 break;
3513 default:
3514 /* not supported */
3515 break;
3516 }
3517
3518 if (id < 0 || id >= pos->num_dai) {
3519 ret = -EINVAL;
3520 continue;
3521 }
3522
3523 ret = 0;
3524
3525 /* find target DAI */
3526 for_each_component_dais(pos, dai) {
3527 if (id == 0)
3528 break;
3529 id--;
3530 }
3531
3532 dlc->dai_name = snd_soc_dai_name_get(dai);
3533 } else if (ret) {
3534 /*
3535 * if another error than ENOTSUPP is returned go on and
3536 * check if another component is provided with the same
3537 * node. This may happen if a device provides several
3538 * components
3539 */
3540 continue;
3541 }
3542
3543 break;
3544 }
3545
3546 if (ret == 0)
3547 dlc->of_node = args->np;
3548
3549 mutex_unlock(&client_mutex);
3550 return ret;
3551}
3552EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3553
3554int snd_soc_of_get_dlc(struct device_node *of_node,
3555 struct of_phandle_args *args,
3556 struct snd_soc_dai_link_component *dlc,
3557 int index)
3558{
3559 struct of_phandle_args __args;
3560 int ret;
3561
3562 if (!args)
3563 args = &__args;
3564
3565 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3566 "#sound-dai-cells", index, args);
3567 if (ret)
3568 return ret;
3569
3570 return snd_soc_get_dlc(args, dlc);
3571}
3572EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3573
3574int snd_soc_get_dai_name(const struct of_phandle_args *args,
3575 const char **dai_name)
3576{
3577 struct snd_soc_dai_link_component dlc;
3578 int ret = snd_soc_get_dlc(args, &dlc);
3579
3580 if (ret == 0)
3581 *dai_name = dlc.dai_name;
3582
3583 return ret;
3584}
3585EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3586
3587int snd_soc_of_get_dai_name(struct device_node *of_node,
3588 const char **dai_name, int index)
3589{
3590 struct snd_soc_dai_link_component dlc;
3591 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3592
3593 if (ret == 0)
3594 *dai_name = dlc.dai_name;
3595
3596 return ret;
3597}
3598EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3599
3600struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args)
3601{
3602 struct snd_soc_dai *dai;
3603 struct snd_soc_component *component;
3604
3605 mutex_lock(&client_mutex);
3606 for_each_component(component) {
3607 for_each_component_dais(component, dai)
3608 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3609 goto found;
3610 }
3611 dai = NULL;
3612found:
3613 mutex_unlock(&client_mutex);
3614 return dai;
3615}
3616EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3617
3618static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3619{
3620 if (component->of_node) {
3621 of_node_put(component->of_node);
3622 component->of_node = NULL;
3623 }
3624}
3625
3626static int __snd_soc_of_get_dai_link_component_alloc(
3627 struct device *dev, struct device_node *of_node,
3628 struct snd_soc_dai_link_component **ret_component,
3629 int *ret_num)
3630{
3631 struct snd_soc_dai_link_component *component;
3632 int num;
3633
3634 /* Count the number of CPUs/CODECs */
3635 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3636 if (num <= 0) {
3637 if (num == -ENOENT)
3638 dev_err(dev, "No 'sound-dai' property\n");
3639 else
3640 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3641 return num;
3642 }
3643 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3644 if (!component)
3645 return -ENOMEM;
3646
3647 *ret_component = component;
3648 *ret_num = num;
3649
3650 return 0;
3651}
3652
3653/*
3654 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3655 * @dai_link: DAI link
3656 *
3657 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3658 */
3659void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3660{
3661 struct snd_soc_dai_link_component *component;
3662 int index;
3663
3664 for_each_link_codecs(dai_link, index, component)
3665 __snd_soc_of_put_component(component);
3666}
3667EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3668
3669/*
3670 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3671 * @dev: Card device
3672 * @of_node: Device node
3673 * @dai_link: DAI link
3674 *
3675 * Builds an array of CODEC DAI components from the DAI link property
3676 * 'sound-dai'.
3677 * The array is set in the DAI link and the number of DAIs is set accordingly.
3678 * The device nodes in the array (of_node) must be dereferenced by calling
3679 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3680 *
3681 * Returns 0 for success
3682 */
3683int snd_soc_of_get_dai_link_codecs(struct device *dev,
3684 struct device_node *of_node,
3685 struct snd_soc_dai_link *dai_link)
3686{
3687 struct snd_soc_dai_link_component *component;
3688 int index, ret;
3689
3690 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3691 &dai_link->codecs, &dai_link->num_codecs);
3692 if (ret < 0)
3693 return ret;
3694
3695 /* Parse the list */
3696 for_each_link_codecs(dai_link, index, component) {
3697 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3698 if (ret)
3699 goto err;
3700 }
3701 return 0;
3702err:
3703 snd_soc_of_put_dai_link_codecs(dai_link);
3704 dai_link->codecs = NULL;
3705 dai_link->num_codecs = 0;
3706 return ret;
3707}
3708EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3709
3710/*
3711 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3712 * @dai_link: DAI link
3713 *
3714 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3715 */
3716void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3717{
3718 struct snd_soc_dai_link_component *component;
3719 int index;
3720
3721 for_each_link_cpus(dai_link, index, component)
3722 __snd_soc_of_put_component(component);
3723}
3724EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3725
3726/*
3727 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3728 * @dev: Card device
3729 * @of_node: Device node
3730 * @dai_link: DAI link
3731 *
3732 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3733 * instead.
3734 *
3735 * Returns 0 for success
3736 */
3737int snd_soc_of_get_dai_link_cpus(struct device *dev,
3738 struct device_node *of_node,
3739 struct snd_soc_dai_link *dai_link)
3740{
3741 struct snd_soc_dai_link_component *component;
3742 int index, ret;
3743
3744 /* Count the number of CPUs */
3745 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3746 &dai_link->cpus, &dai_link->num_cpus);
3747 if (ret < 0)
3748 return ret;
3749
3750 /* Parse the list */
3751 for_each_link_cpus(dai_link, index, component) {
3752 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3753 if (ret)
3754 goto err;
3755 }
3756 return 0;
3757err:
3758 snd_soc_of_put_dai_link_cpus(dai_link);
3759 dai_link->cpus = NULL;
3760 dai_link->num_cpus = 0;
3761 return ret;
3762}
3763EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3764
3765static int __init snd_soc_init(void)
3766{
3767 int ret;
3768
3769 snd_soc_debugfs_init();
3770 ret = snd_soc_util_init();
3771 if (ret)
3772 goto err_util_init;
3773
3774 ret = platform_driver_register(&soc_driver);
3775 if (ret)
3776 goto err_register;
3777 return 0;
3778
3779err_register:
3780 snd_soc_util_exit();
3781err_util_init:
3782 snd_soc_debugfs_exit();
3783 return ret;
3784}
3785module_init(snd_soc_init);
3786
3787static void __exit snd_soc_exit(void)
3788{
3789 snd_soc_util_exit();
3790 snd_soc_debugfs_exit();
3791
3792 platform_driver_unregister(&soc_driver);
3793}
3794module_exit(snd_soc_exit);
3795
3796/* Module information */
3797MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3798MODULE_DESCRIPTION("ALSA SoC Core");
3799MODULE_LICENSE("GPL");
3800MODULE_ALIAS("platform:soc-audio");