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