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