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sata_sil24: Identify which card suffered IRQ status error
[linux-2.6/btrfs-unstable.git] / sound / soc / soc-core.c
blobb87d7d882e6dfb016d08806101996e3659aa11bd
1 /*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
36 #include <linux/of.h>
37 #include <linux/gpio.h>
38 #include <linux/of_gpio.h>
39 #include <sound/ac97_codec.h>
40 #include <sound/core.h>
41 #include <sound/jack.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc.h>
45 #include <sound/soc-dpcm.h>
46 #include <sound/initval.h>
47
48 #define CREATE_TRACE_POINTS
49 #include <trace/events/asoc.h>
50
51 #define NAME_SIZE 32
52
53 #ifdef CONFIG_DEBUG_FS
54 struct dentry *snd_soc_debugfs_root;
55 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
56 #endif
57
58 static DEFINE_MUTEX(client_mutex);
59 static LIST_HEAD(platform_list);
60 static LIST_HEAD(codec_list);
61 static LIST_HEAD(component_list);
62
63 /*
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
67 */
68 static int pmdown_time = 5000;
69 module_param(pmdown_time, int, 0);
70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72 struct snd_ac97_reset_cfg {
73 struct pinctrl *pctl;
74 struct pinctrl_state *pstate_reset;
75 struct pinctrl_state *pstate_warm_reset;
76 struct pinctrl_state *pstate_run;
77 int gpio_sdata;
78 int gpio_sync;
79 int gpio_reset;
80 };
81
82 /* returns the minimum number of bytes needed to represent
83 * a particular given value */
84 static int min_bytes_needed(unsigned long val)
85 {
86 int c = 0;
87 int i;
88
89 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
90 if (val & (1UL << i))
91 break;
92 c = (sizeof val * 8) - c;
93 if (!c || (c % 8))
94 c = (c + 8) / 8;
95 else
96 c /= 8;
97 return c;
98 }
99
100 /* fill buf which is 'len' bytes with a formatted
101 * string of the form 'reg: value\n' */
102 static int format_register_str(struct snd_soc_codec *codec,
103 unsigned int reg, char *buf, size_t len)
104 {
105 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
106 int regsize = codec->driver->reg_word_size * 2;
107 int ret;
108 char tmpbuf[len + 1];
109 char regbuf[regsize + 1];
110
111 /* since tmpbuf is allocated on the stack, warn the callers if they
112 * try to abuse this function */
113 WARN_ON(len > 63);
114
115 /* +2 for ': ' and + 1 for '\n' */
116 if (wordsize + regsize + 2 + 1 != len)
117 return -EINVAL;
118
119 ret = snd_soc_read(codec, reg);
120 if (ret < 0) {
121 memset(regbuf, 'X', regsize);
122 regbuf[regsize] = '\0';
123 } else {
124 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
125 }
126
127 /* prepare the buffer */
128 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
129 /* copy it back to the caller without the '\0' */
130 memcpy(buf, tmpbuf, len);
131
132 return 0;
133 }
134
135 /* codec register dump */
136 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
137 size_t count, loff_t pos)
138 {
139 int i, step = 1;
140 int wordsize, regsize;
141 int len;
142 size_t total = 0;
143 loff_t p = 0;
144
145 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
146 regsize = codec->driver->reg_word_size * 2;
147
148 len = wordsize + regsize + 2 + 1;
149
150 if (!codec->driver->reg_cache_size)
151 return 0;
152
153 if (codec->driver->reg_cache_step)
154 step = codec->driver->reg_cache_step;
155
156 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
157 /* only support larger than PAGE_SIZE bytes debugfs
158 * entries for the default case */
159 if (p >= pos) {
160 if (total + len >= count - 1)
161 break;
162 format_register_str(codec, i, buf + total, len);
163 total += len;
164 }
165 p += len;
166 }
167
168 total = min(total, count - 1);
169
170 return total;
171 }
172
173 static ssize_t codec_reg_show(struct device *dev,
174 struct device_attribute *attr, char *buf)
175 {
176 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
177
178 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
179 }
180
181 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
182
183 static ssize_t pmdown_time_show(struct device *dev,
184 struct device_attribute *attr, char *buf)
185 {
186 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
187
188 return sprintf(buf, "%ld\n", rtd->pmdown_time);
189 }
190
191 static ssize_t pmdown_time_set(struct device *dev,
192 struct device_attribute *attr,
193 const char *buf, size_t count)
194 {
195 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
196 int ret;
197
198 ret = kstrtol(buf, 10, &rtd->pmdown_time);
199 if (ret)
200 return ret;
201
202 return count;
203 }
204
205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206
207 #ifdef CONFIG_DEBUG_FS
208 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
209 size_t count, loff_t *ppos)
210 {
211 ssize_t ret;
212 struct snd_soc_codec *codec = file->private_data;
213 char *buf;
214
215 if (*ppos < 0 || !count)
216 return -EINVAL;
217
218 buf = kmalloc(count, GFP_KERNEL);
219 if (!buf)
220 return -ENOMEM;
221
222 ret = soc_codec_reg_show(codec, buf, count, *ppos);
223 if (ret >= 0) {
224 if (copy_to_user(user_buf, buf, ret)) {
225 kfree(buf);
226 return -EFAULT;
227 }
228 *ppos += ret;
229 }
230
231 kfree(buf);
232 return ret;
233 }
234
235 static ssize_t codec_reg_write_file(struct file *file,
236 const char __user *user_buf, size_t count, loff_t *ppos)
237 {
238 char buf[32];
239 size_t buf_size;
240 char *start = buf;
241 unsigned long reg, value;
242 struct snd_soc_codec *codec = file->private_data;
243 int ret;
244
245 buf_size = min(count, (sizeof(buf)-1));
246 if (copy_from_user(buf, user_buf, buf_size))
247 return -EFAULT;
248 buf[buf_size] = 0;
249
250 while (*start == ' ')
251 start++;
252 reg = simple_strtoul(start, &start, 16);
253 while (*start == ' ')
254 start++;
255 ret = kstrtoul(start, 16, &value);
256 if (ret)
257 return ret;
258
259 /* Userspace has been fiddling around behind the kernel's back */
260 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
261
262 snd_soc_write(codec, reg, value);
263 return buf_size;
264 }
265
266 static const struct file_operations codec_reg_fops = {
267 .open = simple_open,
268 .read = codec_reg_read_file,
269 .write = codec_reg_write_file,
270 .llseek = default_llseek,
271 };
272
273 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
274 {
275 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
276
277 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
278 debugfs_card_root);
279 if (!codec->debugfs_codec_root) {
280 dev_warn(codec->dev,
281 "ASoC: Failed to create codec debugfs directory\n");
282 return;
283 }
284
285 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
286 &codec->cache_sync);
287 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
288 &codec->cache_only);
289
290 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
291 codec->debugfs_codec_root,
292 codec, &codec_reg_fops);
293 if (!codec->debugfs_reg)
294 dev_warn(codec->dev,
295 "ASoC: Failed to create codec register debugfs file\n");
296
297 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
298 }
299
300 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
301 {
302 debugfs_remove_recursive(codec->debugfs_codec_root);
303 }
304
305 static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
306 {
307 struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
308
309 platform->debugfs_platform_root = debugfs_create_dir(platform->name,
310 debugfs_card_root);
311 if (!platform->debugfs_platform_root) {
312 dev_warn(platform->dev,
313 "ASoC: Failed to create platform debugfs directory\n");
314 return;
315 }
316
317 snd_soc_dapm_debugfs_init(&platform->dapm,
318 platform->debugfs_platform_root);
319 }
320
321 static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
322 {
323 debugfs_remove_recursive(platform->debugfs_platform_root);
324 }
325
326 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
327 size_t count, loff_t *ppos)
328 {
329 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
330 ssize_t len, ret = 0;
331 struct snd_soc_codec *codec;
332
333 if (!buf)
334 return -ENOMEM;
335
336 list_for_each_entry(codec, &codec_list, list) {
337 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
338 codec->name);
339 if (len >= 0)
340 ret += len;
341 if (ret > PAGE_SIZE) {
342 ret = PAGE_SIZE;
343 break;
344 }
345 }
346
347 if (ret >= 0)
348 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
349
350 kfree(buf);
351
352 return ret;
353 }
354
355 static const struct file_operations codec_list_fops = {
356 .read = codec_list_read_file,
357 .llseek = default_llseek,/* read accesses f_pos */
358 };
359
360 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
361 size_t count, loff_t *ppos)
362 {
363 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
364 ssize_t len, ret = 0;
365 struct snd_soc_component *component;
366 struct snd_soc_dai *dai;
367
368 if (!buf)
369 return -ENOMEM;
370
371 list_for_each_entry(component, &component_list, list) {
372 list_for_each_entry(dai, &component->dai_list, list) {
373 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
374 dai->name);
375 if (len >= 0)
376 ret += len;
377 if (ret > PAGE_SIZE) {
378 ret = PAGE_SIZE;
379 break;
380 }
381 }
382 }
383
384 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
385
386 kfree(buf);
387
388 return ret;
389 }
390
391 static const struct file_operations dai_list_fops = {
392 .read = dai_list_read_file,
393 .llseek = default_llseek,/* read accesses f_pos */
394 };
395
396 static ssize_t platform_list_read_file(struct file *file,
397 char __user *user_buf,
398 size_t count, loff_t *ppos)
399 {
400 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
401 ssize_t len, ret = 0;
402 struct snd_soc_platform *platform;
403
404 if (!buf)
405 return -ENOMEM;
406
407 list_for_each_entry(platform, &platform_list, list) {
408 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
409 platform->name);
410 if (len >= 0)
411 ret += len;
412 if (ret > PAGE_SIZE) {
413 ret = PAGE_SIZE;
414 break;
415 }
416 }
417
418 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
419
420 kfree(buf);
421
422 return ret;
423 }
424
425 static const struct file_operations platform_list_fops = {
426 .read = platform_list_read_file,
427 .llseek = default_llseek,/* read accesses f_pos */
428 };
429
430 static void soc_init_card_debugfs(struct snd_soc_card *card)
431 {
432 card->debugfs_card_root = debugfs_create_dir(card->name,
433 snd_soc_debugfs_root);
434 if (!card->debugfs_card_root) {
435 dev_warn(card->dev,
436 "ASoC: Failed to create card debugfs directory\n");
437 return;
438 }
439
440 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
441 card->debugfs_card_root,
442 &card->pop_time);
443 if (!card->debugfs_pop_time)
444 dev_warn(card->dev,
445 "ASoC: Failed to create pop time debugfs file\n");
446 }
447
448 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
449 {
450 debugfs_remove_recursive(card->debugfs_card_root);
451 }
452
453 #else
454
455 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
456 {
457 }
458
459 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
460 {
461 }
462
463 static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
464 {
465 }
466
467 static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
468 {
469 }
470
471 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
472 {
473 }
474
475 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
476 {
477 }
478 #endif
479
480 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
481 const char *dai_link, int stream)
482 {
483 int i;
484
485 for (i = 0; i < card->num_links; i++) {
486 if (card->rtd[i].dai_link->no_pcm &&
487 !strcmp(card->rtd[i].dai_link->name, dai_link))
488 return card->rtd[i].pcm->streams[stream].substream;
489 }
490 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
491 return NULL;
492 }
493 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
494
495 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
496 const char *dai_link)
497 {
498 int i;
499
500 for (i = 0; i < card->num_links; i++) {
501 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
502 return &card->rtd[i];
503 }
504 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
505 return NULL;
506 }
507 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
508
509 #ifdef CONFIG_SND_SOC_AC97_BUS
510 /* unregister ac97 codec */
511 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
512 {
513 if (codec->ac97->dev.bus)
514 device_unregister(&codec->ac97->dev);
515 return 0;
516 }
517
518 /* stop no dev release warning */
519 static void soc_ac97_device_release(struct device *dev){}
520
521 /* register ac97 codec to bus */
522 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
523 {
524 int err;
525
526 codec->ac97->dev.bus = &ac97_bus_type;
527 codec->ac97->dev.parent = codec->card->dev;
528 codec->ac97->dev.release = soc_ac97_device_release;
529
530 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
531 codec->card->snd_card->number, 0, codec->name);
532 err = device_register(&codec->ac97->dev);
533 if (err < 0) {
534 dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");
535 codec->ac97->dev.bus = NULL;
536 return err;
537 }
538 return 0;
539 }
540 #endif
541
542 static void codec2codec_close_delayed_work(struct work_struct *work)
543 {
544 /* Currently nothing to do for c2c links
545 * Since c2c links are internal nodes in the DAPM graph and
546 * don't interface with the outside world or application layer
547 * we don't have to do any special handling on close.
548 */
549 }
550
551 #ifdef CONFIG_PM_SLEEP
552 /* powers down audio subsystem for suspend */
553 int snd_soc_suspend(struct device *dev)
554 {
555 struct snd_soc_card *card = dev_get_drvdata(dev);
556 struct snd_soc_codec *codec;
557 int i;
558
559 /* If the initialization of this soc device failed, there is no codec
560 * associated with it. Just bail out in this case.
561 */
562 if (list_empty(&card->codec_dev_list))
563 return 0;
564
565 /* Due to the resume being scheduled into a workqueue we could
566 * suspend before that's finished - wait for it to complete.
567 */
568 snd_power_lock(card->snd_card);
569 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
570 snd_power_unlock(card->snd_card);
571
572 /* we're going to block userspace touching us until resume completes */
573 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
574
575 /* mute any active DACs */
576 for (i = 0; i < card->num_rtd; i++) {
577 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
578 struct snd_soc_dai_driver *drv = dai->driver;
579
580 if (card->rtd[i].dai_link->ignore_suspend)
581 continue;
582
583 if (drv->ops->digital_mute && dai->playback_active)
584 drv->ops->digital_mute(dai, 1);
585 }
586
587 /* suspend all pcms */
588 for (i = 0; i < card->num_rtd; i++) {
589 if (card->rtd[i].dai_link->ignore_suspend)
590 continue;
591
592 snd_pcm_suspend_all(card->rtd[i].pcm);
593 }
594
595 if (card->suspend_pre)
596 card->suspend_pre(card);
597
598 for (i = 0; i < card->num_rtd; i++) {
599 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
600 struct snd_soc_platform *platform = card->rtd[i].platform;
601
602 if (card->rtd[i].dai_link->ignore_suspend)
603 continue;
604
605 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
606 cpu_dai->driver->suspend(cpu_dai);
607 if (platform->driver->suspend && !platform->suspended) {
608 platform->driver->suspend(cpu_dai);
609 platform->suspended = 1;
610 }
611 }
612
613 /* close any waiting streams and save state */
614 for (i = 0; i < card->num_rtd; i++) {
615 flush_delayed_work(&card->rtd[i].delayed_work);
616 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
617 }
618
619 for (i = 0; i < card->num_rtd; i++) {
620
621 if (card->rtd[i].dai_link->ignore_suspend)
622 continue;
623
624 snd_soc_dapm_stream_event(&card->rtd[i],
625 SNDRV_PCM_STREAM_PLAYBACK,
626 SND_SOC_DAPM_STREAM_SUSPEND);
627
628 snd_soc_dapm_stream_event(&card->rtd[i],
629 SNDRV_PCM_STREAM_CAPTURE,
630 SND_SOC_DAPM_STREAM_SUSPEND);
631 }
632
633 /* Recheck all analogue paths too */
634 dapm_mark_io_dirty(&card->dapm);
635 snd_soc_dapm_sync(&card->dapm);
636
637 /* suspend all CODECs */
638 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
639 /* If there are paths active then the CODEC will be held with
640 * bias _ON and should not be suspended. */
641 if (!codec->suspended && codec->driver->suspend) {
642 switch (codec->dapm.bias_level) {
643 case SND_SOC_BIAS_STANDBY:
644 /*
645 * If the CODEC is capable of idle
646 * bias off then being in STANDBY
647 * means it's doing something,
648 * otherwise fall through.
649 */
650 if (codec->dapm.idle_bias_off) {
651 dev_dbg(codec->dev,
652 "ASoC: idle_bias_off CODEC on over suspend\n");
653 break;
654 }
655 case SND_SOC_BIAS_OFF:
656 codec->driver->suspend(codec);
657 codec->suspended = 1;
658 codec->cache_sync = 1;
659 if (codec->component.regmap)
660 regcache_mark_dirty(codec->component.regmap);
661 /* deactivate pins to sleep state */
662 pinctrl_pm_select_sleep_state(codec->dev);
663 break;
664 default:
665 dev_dbg(codec->dev,
666 "ASoC: CODEC is on over suspend\n");
667 break;
668 }
669 }
670 }
671
672 for (i = 0; i < card->num_rtd; i++) {
673 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
674
675 if (card->rtd[i].dai_link->ignore_suspend)
676 continue;
677
678 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
679 cpu_dai->driver->suspend(cpu_dai);
680
681 /* deactivate pins to sleep state */
682 pinctrl_pm_select_sleep_state(cpu_dai->dev);
683 }
684
685 if (card->suspend_post)
686 card->suspend_post(card);
687
688 return 0;
689 }
690 EXPORT_SYMBOL_GPL(snd_soc_suspend);
691
692 /* deferred resume work, so resume can complete before we finished
693 * setting our codec back up, which can be very slow on I2C
694 */
695 static void soc_resume_deferred(struct work_struct *work)
696 {
697 struct snd_soc_card *card =
698 container_of(work, struct snd_soc_card, deferred_resume_work);
699 struct snd_soc_codec *codec;
700 int i;
701
702 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
703 * so userspace apps are blocked from touching us
704 */
705
706 dev_dbg(card->dev, "ASoC: starting resume work\n");
707
708 /* Bring us up into D2 so that DAPM starts enabling things */
709 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
710
711 if (card->resume_pre)
712 card->resume_pre(card);
713
714 /* resume AC97 DAIs */
715 for (i = 0; i < card->num_rtd; i++) {
716 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
717
718 if (card->rtd[i].dai_link->ignore_suspend)
719 continue;
720
721 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
722 cpu_dai->driver->resume(cpu_dai);
723 }
724
725 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
726 /* If the CODEC was idle over suspend then it will have been
727 * left with bias OFF or STANDBY and suspended so we must now
728 * resume. Otherwise the suspend was suppressed.
729 */
730 if (codec->driver->resume && codec->suspended) {
731 switch (codec->dapm.bias_level) {
732 case SND_SOC_BIAS_STANDBY:
733 case SND_SOC_BIAS_OFF:
734 codec->driver->resume(codec);
735 codec->suspended = 0;
736 break;
737 default:
738 dev_dbg(codec->dev,
739 "ASoC: CODEC was on over suspend\n");
740 break;
741 }
742 }
743 }
744
745 for (i = 0; i < card->num_rtd; i++) {
746
747 if (card->rtd[i].dai_link->ignore_suspend)
748 continue;
749
750 snd_soc_dapm_stream_event(&card->rtd[i],
751 SNDRV_PCM_STREAM_PLAYBACK,
752 SND_SOC_DAPM_STREAM_RESUME);
753
754 snd_soc_dapm_stream_event(&card->rtd[i],
755 SNDRV_PCM_STREAM_CAPTURE,
756 SND_SOC_DAPM_STREAM_RESUME);
757 }
758
759 /* unmute any active DACs */
760 for (i = 0; i < card->num_rtd; i++) {
761 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
762 struct snd_soc_dai_driver *drv = dai->driver;
763
764 if (card->rtd[i].dai_link->ignore_suspend)
765 continue;
766
767 if (drv->ops->digital_mute && dai->playback_active)
768 drv->ops->digital_mute(dai, 0);
769 }
770
771 for (i = 0; i < card->num_rtd; i++) {
772 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
773 struct snd_soc_platform *platform = card->rtd[i].platform;
774
775 if (card->rtd[i].dai_link->ignore_suspend)
776 continue;
777
778 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
779 cpu_dai->driver->resume(cpu_dai);
780 if (platform->driver->resume && platform->suspended) {
781 platform->driver->resume(cpu_dai);
782 platform->suspended = 0;
783 }
784 }
785
786 if (card->resume_post)
787 card->resume_post(card);
788
789 dev_dbg(card->dev, "ASoC: resume work completed\n");
790
791 /* userspace can access us now we are back as we were before */
792 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
793
794 /* Recheck all analogue paths too */
795 dapm_mark_io_dirty(&card->dapm);
796 snd_soc_dapm_sync(&card->dapm);
797 }
798
799 /* powers up audio subsystem after a suspend */
800 int snd_soc_resume(struct device *dev)
801 {
802 struct snd_soc_card *card = dev_get_drvdata(dev);
803 int i, ac97_control = 0;
804
805 /* If the initialization of this soc device failed, there is no codec
806 * associated with it. Just bail out in this case.
807 */
808 if (list_empty(&card->codec_dev_list))
809 return 0;
810
811 /* activate pins from sleep state */
812 for (i = 0; i < card->num_rtd; i++) {
813 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
814 struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
815 if (cpu_dai->active)
816 pinctrl_pm_select_default_state(cpu_dai->dev);
817 if (codec_dai->active)
818 pinctrl_pm_select_default_state(codec_dai->dev);
819 }
820
821 /* AC97 devices might have other drivers hanging off them so
822 * need to resume immediately. Other drivers don't have that
823 * problem and may take a substantial amount of time to resume
824 * due to I/O costs and anti-pop so handle them out of line.
825 */
826 for (i = 0; i < card->num_rtd; i++) {
827 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
828 ac97_control |= cpu_dai->driver->ac97_control;
829 }
830 if (ac97_control) {
831 dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
832 soc_resume_deferred(&card->deferred_resume_work);
833 } else {
834 dev_dbg(dev, "ASoC: Scheduling resume work\n");
835 if (!schedule_work(&card->deferred_resume_work))
836 dev_err(dev, "ASoC: resume work item may be lost\n");
837 }
838
839 return 0;
840 }
841 EXPORT_SYMBOL_GPL(snd_soc_resume);
842 #else
843 #define snd_soc_suspend NULL
844 #define snd_soc_resume NULL
845 #endif
846
847 static const struct snd_soc_dai_ops null_dai_ops = {
848 };
849
850 static struct snd_soc_codec *soc_find_codec(const struct device_node *codec_of_node,
851 const char *codec_name)
852 {
853 struct snd_soc_codec *codec;
854
855 list_for_each_entry(codec, &codec_list, list) {
856 if (codec_of_node) {
857 if (codec->dev->of_node != codec_of_node)
858 continue;
859 } else {
860 if (strcmp(codec->name, codec_name))
861 continue;
862 }
863
864 return codec;
865 }
866
867 return NULL;
868 }
869
870 static struct snd_soc_dai *soc_find_codec_dai(struct snd_soc_codec *codec,
871 const char *codec_dai_name)
872 {
873 struct snd_soc_dai *codec_dai;
874
875 list_for_each_entry(codec_dai, &codec->component.dai_list, list) {
876 if (!strcmp(codec_dai->name, codec_dai_name)) {
877 return codec_dai;
878 }
879 }
880
881 return NULL;
882 }
883
884 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
885 {
886 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
887 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
888 struct snd_soc_component *component;
889 struct snd_soc_platform *platform;
890 struct snd_soc_dai *cpu_dai;
891 const char *platform_name;
892
893 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
894
895 /* Find CPU DAI from registered DAIs*/
896 list_for_each_entry(component, &component_list, list) {
897 if (dai_link->cpu_of_node &&
898 component->dev->of_node != dai_link->cpu_of_node)
899 continue;
900 if (dai_link->cpu_name &&
901 strcmp(dev_name(component->dev), dai_link->cpu_name))
902 continue;
903 list_for_each_entry(cpu_dai, &component->dai_list, list) {
904 if (dai_link->cpu_dai_name &&
905 strcmp(cpu_dai->name, dai_link->cpu_dai_name))
906 continue;
907
908 rtd->cpu_dai = cpu_dai;
909 }
910 }
911
912 if (!rtd->cpu_dai) {
913 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
914 dai_link->cpu_dai_name);
915 return -EPROBE_DEFER;
916 }
917
918 /* Find CODEC from registered list */
919 rtd->codec = soc_find_codec(dai_link->codec_of_node,
920 dai_link->codec_name);
921 if (!rtd->codec) {
922 dev_err(card->dev, "ASoC: CODEC %s not registered\n",
923 dai_link->codec_name);
924 return -EPROBE_DEFER;
925 }
926
927 /* Find CODEC DAI from registered list */
928 rtd->codec_dai = soc_find_codec_dai(rtd->codec,
929 dai_link->codec_dai_name);
930 if (!rtd->codec_dai) {
931 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
932 dai_link->codec_dai_name);
933 return -EPROBE_DEFER;
934 }
935
936 /* if there's no platform we match on the empty platform */
937 platform_name = dai_link->platform_name;
938 if (!platform_name && !dai_link->platform_of_node)
939 platform_name = "snd-soc-dummy";
940
941 /* find one from the set of registered platforms */
942 list_for_each_entry(platform, &platform_list, list) {
943 if (dai_link->platform_of_node) {
944 if (platform->dev->of_node !=
945 dai_link->platform_of_node)
946 continue;
947 } else {
948 if (strcmp(platform->name, platform_name))
949 continue;
950 }
951
952 rtd->platform = platform;
953 }
954 if (!rtd->platform) {
955 dev_err(card->dev, "ASoC: platform %s not registered\n",
956 dai_link->platform_name);
957 return -EPROBE_DEFER;
958 }
959
960 card->num_rtd++;
961
962 return 0;
963 }
964
965 static int soc_remove_platform(struct snd_soc_platform *platform)
966 {
967 int ret;
968
969 if (platform->driver->remove) {
970 ret = platform->driver->remove(platform);
971 if (ret < 0)
972 dev_err(platform->dev, "ASoC: failed to remove %d\n",
973 ret);
974 }
975
976 /* Make sure all DAPM widgets are freed */
977 snd_soc_dapm_free(&platform->dapm);
978
979 soc_cleanup_platform_debugfs(platform);
980 platform->probed = 0;
981 list_del(&platform->card_list);
982 module_put(platform->dev->driver->owner);
983
984 return 0;
985 }
986
987 static void soc_remove_codec(struct snd_soc_codec *codec)
988 {
989 int err;
990
991 if (codec->driver->remove) {
992 err = codec->driver->remove(codec);
993 if (err < 0)
994 dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
995 }
996
997 /* Make sure all DAPM widgets are freed */
998 snd_soc_dapm_free(&codec->dapm);
999
1000 soc_cleanup_codec_debugfs(codec);
1001 codec->probed = 0;
1002 list_del(&codec->card_list);
1003 module_put(codec->dev->driver->owner);
1004 }
1005
1006 static void soc_remove_codec_dai(struct snd_soc_dai *codec_dai, int order)
1007 {
1008 int err;
1009
1010 if (codec_dai && codec_dai->probed &&
1011 codec_dai->driver->remove_order == order) {
1012 if (codec_dai->driver->remove) {
1013 err = codec_dai->driver->remove(codec_dai);
1014 if (err < 0)
1015 dev_err(codec_dai->dev,
1016 "ASoC: failed to remove %s: %d\n",
1017 codec_dai->name, err);
1018 }
1019 codec_dai->probed = 0;
1020 }
1021 }
1022
1023 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1024 {
1025 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1026 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1027 int err;
1028
1029 /* unregister the rtd device */
1030 if (rtd->dev_registered) {
1031 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
1032 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1033 device_unregister(rtd->dev);
1034 rtd->dev_registered = 0;
1035 }
1036
1037 /* remove the CODEC DAI */
1038 soc_remove_codec_dai(codec_dai, order);
1039
1040 /* remove the cpu_dai */
1041 if (cpu_dai && cpu_dai->probed &&
1042 cpu_dai->driver->remove_order == order) {
1043 if (cpu_dai->driver->remove) {
1044 err = cpu_dai->driver->remove(cpu_dai);
1045 if (err < 0)
1046 dev_err(cpu_dai->dev,
1047 "ASoC: failed to remove %s: %d\n",
1048 cpu_dai->name, err);
1049 }
1050 cpu_dai->probed = 0;
1051
1052 if (!cpu_dai->codec) {
1053 snd_soc_dapm_free(&cpu_dai->dapm);
1054 module_put(cpu_dai->dev->driver->owner);
1055 }
1056 }
1057 }
1058
1059 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1060 int order)
1061 {
1062 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1063 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1064 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1065 struct snd_soc_platform *platform = rtd->platform;
1066 struct snd_soc_codec *codec;
1067
1068 /* remove the platform */
1069 if (platform && platform->probed &&
1070 platform->driver->remove_order == order) {
1071 soc_remove_platform(platform);
1072 }
1073
1074 /* remove the CODEC-side CODEC */
1075 if (codec_dai) {
1076 codec = codec_dai->codec;
1077 if (codec && codec->probed &&
1078 codec->driver->remove_order == order)
1079 soc_remove_codec(codec);
1080 }
1081
1082 /* remove any CPU-side CODEC */
1083 if (cpu_dai) {
1084 codec = cpu_dai->codec;
1085 if (codec && codec->probed &&
1086 codec->driver->remove_order == order)
1087 soc_remove_codec(codec);
1088 }
1089 }
1090
1091 static void soc_remove_dai_links(struct snd_soc_card *card)
1092 {
1093 int dai, order;
1094
1095 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1096 order++) {
1097 for (dai = 0; dai < card->num_rtd; dai++)
1098 soc_remove_link_dais(card, dai, order);
1099 }
1100
1101 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1102 order++) {
1103 for (dai = 0; dai < card->num_rtd; dai++)
1104 soc_remove_link_components(card, dai, order);
1105 }
1106
1107 card->num_rtd = 0;
1108 }
1109
1110 static void soc_set_name_prefix(struct snd_soc_card *card,
1111 struct snd_soc_codec *codec)
1112 {
1113 int i;
1114
1115 if (card->codec_conf == NULL)
1116 return;
1117
1118 for (i = 0; i < card->num_configs; i++) {
1119 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1120 if (map->of_node && codec->dev->of_node != map->of_node)
1121 continue;
1122 if (map->dev_name && strcmp(codec->name, map->dev_name))
1123 continue;
1124 codec->name_prefix = map->name_prefix;
1125 break;
1126 }
1127 }
1128
1129 static int soc_probe_codec(struct snd_soc_card *card,
1130 struct snd_soc_codec *codec)
1131 {
1132 int ret = 0;
1133 const struct snd_soc_codec_driver *driver = codec->driver;
1134 struct snd_soc_dai *dai;
1135
1136 codec->card = card;
1137 codec->dapm.card = card;
1138 soc_set_name_prefix(card, codec);
1139
1140 if (!try_module_get(codec->dev->driver->owner))
1141 return -ENODEV;
1142
1143 soc_init_codec_debugfs(codec);
1144
1145 if (driver->dapm_widgets) {
1146 ret = snd_soc_dapm_new_controls(&codec->dapm,
1147 driver->dapm_widgets,
1148 driver->num_dapm_widgets);
1149
1150 if (ret != 0) {
1151 dev_err(codec->dev,
1152 "Failed to create new controls %d\n", ret);
1153 goto err_probe;
1154 }
1155 }
1156
1157 /* Create DAPM widgets for each DAI stream */
1158 list_for_each_entry(dai, &codec->component.dai_list, list) {
1159 ret = snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1160
1161 if (ret != 0) {
1162 dev_err(codec->dev,
1163 "Failed to create DAI widgets %d\n", ret);
1164 goto err_probe;
1165 }
1166 }
1167
1168 codec->dapm.idle_bias_off = driver->idle_bias_off;
1169
1170 if (driver->probe) {
1171 ret = driver->probe(codec);
1172 if (ret < 0) {
1173 dev_err(codec->dev,
1174 "ASoC: failed to probe CODEC %d\n", ret);
1175 goto err_probe;
1176 }
1177 WARN(codec->dapm.idle_bias_off &&
1178 codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1179 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1180 codec->name);
1181 }
1182
1183 if (driver->controls)
1184 snd_soc_add_codec_controls(codec, driver->controls,
1185 driver->num_controls);
1186 if (driver->dapm_routes)
1187 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1188 driver->num_dapm_routes);
1189
1190 /* mark codec as probed and add to card codec list */
1191 codec->probed = 1;
1192 list_add(&codec->card_list, &card->codec_dev_list);
1193 list_add(&codec->dapm.list, &card->dapm_list);
1194
1195 return 0;
1196
1197 err_probe:
1198 soc_cleanup_codec_debugfs(codec);
1199 module_put(codec->dev->driver->owner);
1200
1201 return ret;
1202 }
1203
1204 static int soc_probe_platform(struct snd_soc_card *card,
1205 struct snd_soc_platform *platform)
1206 {
1207 int ret = 0;
1208 const struct snd_soc_platform_driver *driver = platform->driver;
1209 struct snd_soc_component *component;
1210 struct snd_soc_dai *dai;
1211
1212 platform->card = card;
1213 platform->dapm.card = card;
1214
1215 if (!try_module_get(platform->dev->driver->owner))
1216 return -ENODEV;
1217
1218 soc_init_platform_debugfs(platform);
1219
1220 if (driver->dapm_widgets)
1221 snd_soc_dapm_new_controls(&platform->dapm,
1222 driver->dapm_widgets, driver->num_dapm_widgets);
1223
1224 /* Create DAPM widgets for each DAI stream */
1225 list_for_each_entry(component, &component_list, list) {
1226 if (component->dev != platform->dev)
1227 continue;
1228 list_for_each_entry(dai, &component->dai_list, list)
1229 snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1230 }
1231
1232 platform->dapm.idle_bias_off = 1;
1233
1234 if (driver->probe) {
1235 ret = driver->probe(platform);
1236 if (ret < 0) {
1237 dev_err(platform->dev,
1238 "ASoC: failed to probe platform %d\n", ret);
1239 goto err_probe;
1240 }
1241 }
1242
1243 if (driver->controls)
1244 snd_soc_add_platform_controls(platform, driver->controls,
1245 driver->num_controls);
1246 if (driver->dapm_routes)
1247 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1248 driver->num_dapm_routes);
1249
1250 /* mark platform as probed and add to card platform list */
1251 platform->probed = 1;
1252 list_add(&platform->card_list, &card->platform_dev_list);
1253 list_add(&platform->dapm.list, &card->dapm_list);
1254
1255 return 0;
1256
1257 err_probe:
1258 soc_cleanup_platform_debugfs(platform);
1259 module_put(platform->dev->driver->owner);
1260
1261 return ret;
1262 }
1263
1264 static void rtd_release(struct device *dev)
1265 {
1266 kfree(dev);
1267 }
1268
1269 static int soc_aux_dev_init(struct snd_soc_card *card,
1270 struct snd_soc_codec *codec,
1271 int num)
1272 {
1273 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1274 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1275 int ret;
1276
1277 rtd->card = card;
1278
1279 /* do machine specific initialization */
1280 if (aux_dev->init) {
1281 ret = aux_dev->init(&codec->dapm);
1282 if (ret < 0)
1283 return ret;
1284 }
1285
1286 rtd->codec = codec;
1287
1288 return 0;
1289 }
1290
1291 static int soc_dai_link_init(struct snd_soc_card *card,
1292 struct snd_soc_codec *codec,
1293 int num)
1294 {
1295 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1296 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1297 int ret;
1298
1299 rtd->card = card;
1300
1301 /* do machine specific initialization */
1302 if (dai_link->init) {
1303 ret = dai_link->init(rtd);
1304 if (ret < 0)
1305 return ret;
1306 }
1307
1308 rtd->codec = codec;
1309
1310 return 0;
1311 }
1312
1313 static int soc_post_component_init(struct snd_soc_card *card,
1314 struct snd_soc_codec *codec,
1315 int num, int dailess)
1316 {
1317 struct snd_soc_dai_link *dai_link = NULL;
1318 struct snd_soc_aux_dev *aux_dev = NULL;
1319 struct snd_soc_pcm_runtime *rtd;
1320 const char *name;
1321 int ret = 0;
1322
1323 if (!dailess) {
1324 dai_link = &card->dai_link[num];
1325 rtd = &card->rtd[num];
1326 name = dai_link->name;
1327 ret = soc_dai_link_init(card, codec, num);
1328 } else {
1329 aux_dev = &card->aux_dev[num];
1330 rtd = &card->rtd_aux[num];
1331 name = aux_dev->name;
1332 ret = soc_aux_dev_init(card, codec, num);
1333 }
1334
1335 if (ret < 0) {
1336 dev_err(card->dev, "ASoC: failed to init %s: %d\n", name, ret);
1337 return ret;
1338 }
1339
1340 /* register the rtd device */
1341 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1342 if (!rtd->dev)
1343 return -ENOMEM;
1344 device_initialize(rtd->dev);
1345 rtd->dev->parent = card->dev;
1346 rtd->dev->release = rtd_release;
1347 rtd->dev->init_name = name;
1348 dev_set_drvdata(rtd->dev, rtd);
1349 mutex_init(&rtd->pcm_mutex);
1350 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1351 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1352 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1353 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1354 ret = device_add(rtd->dev);
1355 if (ret < 0) {
1356 /* calling put_device() here to free the rtd->dev */
1357 put_device(rtd->dev);
1358 dev_err(card->dev,
1359 "ASoC: failed to register runtime device: %d\n", ret);
1360 return ret;
1361 }
1362 rtd->dev_registered = 1;
1363
1364 /* add DAPM sysfs entries for this codec */
1365 ret = snd_soc_dapm_sys_add(rtd->dev);
1366 if (ret < 0)
1367 dev_err(codec->dev,
1368 "ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1369
1370 /* add codec sysfs entries */
1371 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1372 if (ret < 0)
1373 dev_err(codec->dev,
1374 "ASoC: failed to add codec sysfs files: %d\n", ret);
1375
1376 #ifdef CONFIG_DEBUG_FS
1377 /* add DPCM sysfs entries */
1378 if (!dailess && !dai_link->dynamic)
1379 goto out;
1380
1381 ret = soc_dpcm_debugfs_add(rtd);
1382 if (ret < 0)
1383 dev_err(rtd->dev, "ASoC: failed to add dpcm sysfs entries: %d\n", ret);
1384
1385 out:
1386 #endif
1387 return 0;
1388 }
1389
1390 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1391 int order)
1392 {
1393 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1394 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1395 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1396 struct snd_soc_platform *platform = rtd->platform;
1397 int ret;
1398
1399 /* probe the CPU-side component, if it is a CODEC */
1400 if (cpu_dai->codec &&
1401 !cpu_dai->codec->probed &&
1402 cpu_dai->codec->driver->probe_order == order) {
1403 ret = soc_probe_codec(card, cpu_dai->codec);
1404 if (ret < 0)
1405 return ret;
1406 }
1407
1408 /* probe the CODEC-side component */
1409 if (!codec_dai->codec->probed &&
1410 codec_dai->codec->driver->probe_order == order) {
1411 ret = soc_probe_codec(card, codec_dai->codec);
1412 if (ret < 0)
1413 return ret;
1414 }
1415
1416 /* probe the platform */
1417 if (!platform->probed &&
1418 platform->driver->probe_order == order) {
1419 ret = soc_probe_platform(card, platform);
1420 if (ret < 0)
1421 return ret;
1422 }
1423
1424 return 0;
1425 }
1426
1427 static int soc_probe_codec_dai(struct snd_soc_card *card,
1428 struct snd_soc_dai *codec_dai,
1429 int order)
1430 {
1431 int ret;
1432
1433 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1434 if (codec_dai->driver->probe) {
1435 ret = codec_dai->driver->probe(codec_dai);
1436 if (ret < 0) {
1437 dev_err(codec_dai->dev,
1438 "ASoC: failed to probe CODEC DAI %s: %d\n",
1439 codec_dai->name, ret);
1440 return ret;
1441 }
1442 }
1443
1444 /* mark codec_dai as probed and add to card dai list */
1445 codec_dai->probed = 1;
1446 }
1447
1448 return 0;
1449 }
1450
1451 static int soc_link_dai_widgets(struct snd_soc_card *card,
1452 struct snd_soc_dai_link *dai_link,
1453 struct snd_soc_dai *cpu_dai,
1454 struct snd_soc_dai *codec_dai)
1455 {
1456 struct snd_soc_dapm_widget *play_w, *capture_w;
1457 int ret;
1458
1459 /* link the DAI widgets */
1460 play_w = codec_dai->playback_widget;
1461 capture_w = cpu_dai->capture_widget;
1462 if (play_w && capture_w) {
1463 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1464 capture_w, play_w);
1465 if (ret != 0) {
1466 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1467 play_w->name, capture_w->name, ret);
1468 return ret;
1469 }
1470 }
1471
1472 play_w = cpu_dai->playback_widget;
1473 capture_w = codec_dai->capture_widget;
1474 if (play_w && capture_w) {
1475 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1476 capture_w, play_w);
1477 if (ret != 0) {
1478 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1479 play_w->name, capture_w->name, ret);
1480 return ret;
1481 }
1482 }
1483
1484 return 0;
1485 }
1486
1487 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1488 {
1489 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1490 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1491 struct snd_soc_codec *codec = rtd->codec;
1492 struct snd_soc_platform *platform = rtd->platform;
1493 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1494 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1495 int ret;
1496
1497 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1498 card->name, num, order);
1499
1500 /* config components */
1501 cpu_dai->platform = platform;
1502 codec_dai->card = card;
1503 cpu_dai->card = card;
1504
1505 /* set default power off timeout */
1506 rtd->pmdown_time = pmdown_time;
1507
1508 /* probe the cpu_dai */
1509 if (!cpu_dai->probed &&
1510 cpu_dai->driver->probe_order == order) {
1511 if (!cpu_dai->codec) {
1512 cpu_dai->dapm.card = card;
1513 if (!try_module_get(cpu_dai->dev->driver->owner))
1514 return -ENODEV;
1515
1516 list_add(&cpu_dai->dapm.list, &card->dapm_list);
1517 }
1518
1519 if (cpu_dai->driver->probe) {
1520 ret = cpu_dai->driver->probe(cpu_dai);
1521 if (ret < 0) {
1522 dev_err(cpu_dai->dev,
1523 "ASoC: failed to probe CPU DAI %s: %d\n",
1524 cpu_dai->name, ret);
1525 module_put(cpu_dai->dev->driver->owner);
1526 return ret;
1527 }
1528 }
1529 cpu_dai->probed = 1;
1530 }
1531
1532 /* probe the CODEC DAI */
1533 ret = soc_probe_codec_dai(card, codec_dai, order);
1534 if (ret)
1535 return ret;
1536
1537 /* complete DAI probe during last probe */
1538 if (order != SND_SOC_COMP_ORDER_LAST)
1539 return 0;
1540
1541 ret = soc_post_component_init(card, codec, num, 0);
1542 if (ret)
1543 return ret;
1544
1545 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1546 if (ret < 0)
1547 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1548 ret);
1549
1550 if (cpu_dai->driver->compress_dai) {
1551 /*create compress_device"*/
1552 ret = soc_new_compress(rtd, num);
1553 if (ret < 0) {
1554 dev_err(card->dev, "ASoC: can't create compress %s\n",
1555 dai_link->stream_name);
1556 return ret;
1557 }
1558 } else {
1559
1560 if (!dai_link->params) {
1561 /* create the pcm */
1562 ret = soc_new_pcm(rtd, num);
1563 if (ret < 0) {
1564 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1565 dai_link->stream_name, ret);
1566 return ret;
1567 }
1568 } else {
1569 INIT_DELAYED_WORK(&rtd->delayed_work,
1570 codec2codec_close_delayed_work);
1571
1572 /* link the DAI widgets */
1573 ret = soc_link_dai_widgets(card, dai_link,
1574 cpu_dai, codec_dai);
1575 if (ret)
1576 return ret;
1577 }
1578 }
1579
1580 /* add platform data for AC97 devices */
1581 if (rtd->codec_dai->driver->ac97_control)
1582 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1583
1584 return 0;
1585 }
1586
1587 #ifdef CONFIG_SND_SOC_AC97_BUS
1588 static int soc_register_ac97_codec(struct snd_soc_codec *codec,
1589 struct snd_soc_dai *codec_dai)
1590 {
1591 int ret;
1592
1593 /* Only instantiate AC97 if not already done by the adaptor
1594 * for the generic AC97 subsystem.
1595 */
1596 if (codec_dai->driver->ac97_control && !codec->ac97_registered) {
1597 /*
1598 * It is possible that the AC97 device is already registered to
1599 * the device subsystem. This happens when the device is created
1600 * via snd_ac97_mixer(). Currently only SoC codec that does so
1601 * is the generic AC97 glue but others migh emerge.
1602 *
1603 * In those cases we don't try to register the device again.
1604 */
1605 if (!codec->ac97_created)
1606 return 0;
1607
1608 ret = soc_ac97_dev_register(codec);
1609 if (ret < 0) {
1610 dev_err(codec->dev,
1611 "ASoC: AC97 device register failed: %d\n", ret);
1612 return ret;
1613 }
1614
1615 codec->ac97_registered = 1;
1616 }
1617 return 0;
1618 }
1619
1620 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1621 {
1622 return soc_register_ac97_codec(rtd->codec, rtd->codec_dai);
1623 }
1624
1625 static void soc_unregister_ac97_codec(struct snd_soc_codec *codec)
1626 {
1627 if (codec->ac97_registered) {
1628 soc_ac97_dev_unregister(codec);
1629 codec->ac97_registered = 0;
1630 }
1631 }
1632
1633 static void soc_unregister_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1634 {
1635 soc_unregister_ac97_codec(rtd->codec);
1636 }
1637 #endif
1638
1639 static struct snd_soc_codec *soc_find_matching_codec(struct snd_soc_card *card,
1640 int num)
1641 {
1642 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1643 struct snd_soc_codec *codec;
1644
1645 /* find CODEC from registered CODECs */
1646 list_for_each_entry(codec, &codec_list, list) {
1647 if (aux_dev->codec_of_node &&
1648 (codec->dev->of_node != aux_dev->codec_of_node))
1649 continue;
1650 if (aux_dev->codec_name && strcmp(codec->name, aux_dev->codec_name))
1651 continue;
1652 return codec;
1653 }
1654
1655 return NULL;
1656 }
1657
1658 static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1659 {
1660 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1661 const char *codecname = aux_dev->codec_name;
1662 struct snd_soc_codec *codec = soc_find_matching_codec(card, num);
1663
1664 if (codec)
1665 return 0;
1666 if (aux_dev->codec_of_node)
1667 codecname = of_node_full_name(aux_dev->codec_of_node);
1668
1669 dev_err(card->dev, "ASoC: %s not registered\n", codecname);
1670 return -EPROBE_DEFER;
1671 }
1672
1673 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1674 {
1675 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1676 const char *codecname = aux_dev->codec_name;
1677 int ret = -ENODEV;
1678 struct snd_soc_codec *codec = soc_find_matching_codec(card, num);
1679
1680 if (!codec) {
1681 if (aux_dev->codec_of_node)
1682 codecname = of_node_full_name(aux_dev->codec_of_node);
1683
1684 /* codec not found */
1685 dev_err(card->dev, "ASoC: codec %s not found", codecname);
1686 return -EPROBE_DEFER;
1687 }
1688
1689 if (codec->probed) {
1690 dev_err(codec->dev, "ASoC: codec already probed");
1691 return -EBUSY;
1692 }
1693
1694 ret = soc_probe_codec(card, codec);
1695 if (ret < 0)
1696 return ret;
1697
1698 ret = soc_post_component_init(card, codec, num, 1);
1699
1700 return ret;
1701 }
1702
1703 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1704 {
1705 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1706 struct snd_soc_codec *codec = rtd->codec;
1707
1708 /* unregister the rtd device */
1709 if (rtd->dev_registered) {
1710 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1711 device_unregister(rtd->dev);
1712 rtd->dev_registered = 0;
1713 }
1714
1715 if (codec && codec->probed)
1716 soc_remove_codec(codec);
1717 }
1718
1719 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1720 {
1721 int ret;
1722
1723 if (codec->cache_init)
1724 return 0;
1725
1726 ret = snd_soc_cache_init(codec);
1727 if (ret < 0) {
1728 dev_err(codec->dev,
1729 "ASoC: Failed to set cache compression type: %d\n",
1730 ret);
1731 return ret;
1732 }
1733 codec->cache_init = 1;
1734 return 0;
1735 }
1736
1737 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1738 {
1739 struct snd_soc_codec *codec;
1740 struct snd_soc_dai_link *dai_link;
1741 int ret, i, order, dai_fmt;
1742
1743 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1744
1745 /* bind DAIs */
1746 for (i = 0; i < card->num_links; i++) {
1747 ret = soc_bind_dai_link(card, i);
1748 if (ret != 0)
1749 goto base_error;
1750 }
1751
1752 /* check aux_devs too */
1753 for (i = 0; i < card->num_aux_devs; i++) {
1754 ret = soc_check_aux_dev(card, i);
1755 if (ret != 0)
1756 goto base_error;
1757 }
1758
1759 /* initialize the register cache for each available codec */
1760 list_for_each_entry(codec, &codec_list, list) {
1761 if (codec->cache_init)
1762 continue;
1763 ret = snd_soc_init_codec_cache(codec);
1764 if (ret < 0)
1765 goto base_error;
1766 }
1767
1768 /* card bind complete so register a sound card */
1769 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1770 card->owner, 0, &card->snd_card);
1771 if (ret < 0) {
1772 dev_err(card->dev,
1773 "ASoC: can't create sound card for card %s: %d\n",
1774 card->name, ret);
1775 goto base_error;
1776 }
1777
1778 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1779 card->dapm.dev = card->dev;
1780 card->dapm.card = card;
1781 list_add(&card->dapm.list, &card->dapm_list);
1782
1783 #ifdef CONFIG_DEBUG_FS
1784 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1785 #endif
1786
1787 #ifdef CONFIG_PM_SLEEP
1788 /* deferred resume work */
1789 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1790 #endif
1791
1792 if (card->dapm_widgets)
1793 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1794 card->num_dapm_widgets);
1795
1796 /* initialise the sound card only once */
1797 if (card->probe) {
1798 ret = card->probe(card);
1799 if (ret < 0)
1800 goto card_probe_error;
1801 }
1802
1803 /* probe all components used by DAI links on this card */
1804 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1805 order++) {
1806 for (i = 0; i < card->num_links; i++) {
1807 ret = soc_probe_link_components(card, i, order);
1808 if (ret < 0) {
1809 dev_err(card->dev,
1810 "ASoC: failed to instantiate card %d\n",
1811 ret);
1812 goto probe_dai_err;
1813 }
1814 }
1815 }
1816
1817 /* probe all DAI links on this card */
1818 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1819 order++) {
1820 for (i = 0; i < card->num_links; i++) {
1821 ret = soc_probe_link_dais(card, i, order);
1822 if (ret < 0) {
1823 dev_err(card->dev,
1824 "ASoC: failed to instantiate card %d\n",
1825 ret);
1826 goto probe_dai_err;
1827 }
1828 }
1829 }
1830
1831 for (i = 0; i < card->num_aux_devs; i++) {
1832 ret = soc_probe_aux_dev(card, i);
1833 if (ret < 0) {
1834 dev_err(card->dev,
1835 "ASoC: failed to add auxiliary devices %d\n",
1836 ret);
1837 goto probe_aux_dev_err;
1838 }
1839 }
1840
1841 snd_soc_dapm_link_dai_widgets(card);
1842 snd_soc_dapm_connect_dai_link_widgets(card);
1843
1844 if (card->controls)
1845 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1846
1847 if (card->dapm_routes)
1848 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1849 card->num_dapm_routes);
1850
1851 for (i = 0; i < card->num_links; i++) {
1852 dai_link = &card->dai_link[i];
1853 dai_fmt = dai_link->dai_fmt;
1854
1855 if (dai_fmt) {
1856 ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1857 dai_fmt);
1858 if (ret != 0 && ret != -ENOTSUPP)
1859 dev_warn(card->rtd[i].codec_dai->dev,
1860 "ASoC: Failed to set DAI format: %d\n",
1861 ret);
1862 }
1863
1864 /* If this is a regular CPU link there will be a platform */
1865 if (dai_fmt &&
1866 (dai_link->platform_name || dai_link->platform_of_node)) {
1867 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1868 dai_fmt);
1869 if (ret != 0 && ret != -ENOTSUPP)
1870 dev_warn(card->rtd[i].cpu_dai->dev,
1871 "ASoC: Failed to set DAI format: %d\n",
1872 ret);
1873 } else if (dai_fmt) {
1874 /* Flip the polarity for the "CPU" end */
1875 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1876 switch (dai_link->dai_fmt &
1877 SND_SOC_DAIFMT_MASTER_MASK) {
1878 case SND_SOC_DAIFMT_CBM_CFM:
1879 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1880 break;
1881 case SND_SOC_DAIFMT_CBM_CFS:
1882 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1883 break;
1884 case SND_SOC_DAIFMT_CBS_CFM:
1885 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1886 break;
1887 case SND_SOC_DAIFMT_CBS_CFS:
1888 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1889 break;
1890 }
1891
1892 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1893 dai_fmt);
1894 if (ret != 0 && ret != -ENOTSUPP)
1895 dev_warn(card->rtd[i].cpu_dai->dev,
1896 "ASoC: Failed to set DAI format: %d\n",
1897 ret);
1898 }
1899 }
1900
1901 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1902 "%s", card->name);
1903 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1904 "%s", card->long_name ? card->long_name : card->name);
1905 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1906 "%s", card->driver_name ? card->driver_name : card->name);
1907 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1908 switch (card->snd_card->driver[i]) {
1909 case '_':
1910 case '-':
1911 case '\0':
1912 break;
1913 default:
1914 if (!isalnum(card->snd_card->driver[i]))
1915 card->snd_card->driver[i] = '_';
1916 break;
1917 }
1918 }
1919
1920 if (card->late_probe) {
1921 ret = card->late_probe(card);
1922 if (ret < 0) {
1923 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1924 card->name, ret);
1925 goto probe_aux_dev_err;
1926 }
1927 }
1928
1929 if (card->fully_routed)
1930 list_for_each_entry(codec, &card->codec_dev_list, card_list)
1931 snd_soc_dapm_auto_nc_codec_pins(codec);
1932
1933 snd_soc_dapm_new_widgets(card);
1934
1935 ret = snd_card_register(card->snd_card);
1936 if (ret < 0) {
1937 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1938 ret);
1939 goto probe_aux_dev_err;
1940 }
1941
1942 #ifdef CONFIG_SND_SOC_AC97_BUS
1943 /* register any AC97 codecs */
1944 for (i = 0; i < card->num_rtd; i++) {
1945 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1946 if (ret < 0) {
1947 dev_err(card->dev,
1948 "ASoC: failed to register AC97: %d\n", ret);
1949 while (--i >= 0)
1950 soc_unregister_ac97_dai_link(&card->rtd[i]);
1951 goto probe_aux_dev_err;
1952 }
1953 }
1954 #endif
1955
1956 card->instantiated = 1;
1957 snd_soc_dapm_sync(&card->dapm);
1958 mutex_unlock(&card->mutex);
1959
1960 return 0;
1961
1962 probe_aux_dev_err:
1963 for (i = 0; i < card->num_aux_devs; i++)
1964 soc_remove_aux_dev(card, i);
1965
1966 probe_dai_err:
1967 soc_remove_dai_links(card);
1968
1969 card_probe_error:
1970 if (card->remove)
1971 card->remove(card);
1972
1973 snd_card_free(card->snd_card);
1974
1975 base_error:
1976 mutex_unlock(&card->mutex);
1977
1978 return ret;
1979 }
1980
1981 /* probes a new socdev */
1982 static int soc_probe(struct platform_device *pdev)
1983 {
1984 struct snd_soc_card *card = platform_get_drvdata(pdev);
1985
1986 /*
1987 * no card, so machine driver should be registering card
1988 * we should not be here in that case so ret error
1989 */
1990 if (!card)
1991 return -EINVAL;
1992
1993 dev_warn(&pdev->dev,
1994 "ASoC: machine %s should use snd_soc_register_card()\n",
1995 card->name);
1996
1997 /* Bodge while we unpick instantiation */
1998 card->dev = &pdev->dev;
1999
2000 return snd_soc_register_card(card);
2001 }
2002
2003 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2004 {
2005 int i;
2006
2007 /* make sure any delayed work runs */
2008 for (i = 0; i < card->num_rtd; i++) {
2009 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2010 flush_delayed_work(&rtd->delayed_work);
2011 }
2012
2013 /* remove auxiliary devices */
2014 for (i = 0; i < card->num_aux_devs; i++)
2015 soc_remove_aux_dev(card, i);
2016
2017 /* remove and free each DAI */
2018 soc_remove_dai_links(card);
2019
2020 soc_cleanup_card_debugfs(card);
2021
2022 /* remove the card */
2023 if (card->remove)
2024 card->remove(card);
2025
2026 snd_soc_dapm_free(&card->dapm);
2027
2028 snd_card_free(card->snd_card);
2029 return 0;
2030
2031 }
2032
2033 /* removes a socdev */
2034 static int soc_remove(struct platform_device *pdev)
2035 {
2036 struct snd_soc_card *card = platform_get_drvdata(pdev);
2037
2038 snd_soc_unregister_card(card);
2039 return 0;
2040 }
2041
2042 int snd_soc_poweroff(struct device *dev)
2043 {
2044 struct snd_soc_card *card = dev_get_drvdata(dev);
2045 int i;
2046
2047 if (!card->instantiated)
2048 return 0;
2049
2050 /* Flush out pmdown_time work - we actually do want to run it
2051 * now, we're shutting down so no imminent restart. */
2052 for (i = 0; i < card->num_rtd; i++) {
2053 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2054 flush_delayed_work(&rtd->delayed_work);
2055 }
2056
2057 snd_soc_dapm_shutdown(card);
2058
2059 /* deactivate pins to sleep state */
2060 for (i = 0; i < card->num_rtd; i++) {
2061 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
2062 struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
2063 pinctrl_pm_select_sleep_state(codec_dai->dev);
2064 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2065 }
2066
2067 return 0;
2068 }
2069 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2070
2071 const struct dev_pm_ops snd_soc_pm_ops = {
2072 .suspend = snd_soc_suspend,
2073 .resume = snd_soc_resume,
2074 .freeze = snd_soc_suspend,
2075 .thaw = snd_soc_resume,
2076 .poweroff = snd_soc_poweroff,
2077 .restore = snd_soc_resume,
2078 };
2079 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2080
2081 /* ASoC platform driver */
2082 static struct platform_driver soc_driver = {
2083 .driver = {
2084 .name = "soc-audio",
2085 .owner = THIS_MODULE,
2086 .pm = &snd_soc_pm_ops,
2087 },
2088 .probe = soc_probe,
2089 .remove = soc_remove,
2090 };
2091
2092 /**
2093 * snd_soc_new_ac97_codec - initailise AC97 device
2094 * @codec: audio codec
2095 * @ops: AC97 bus operations
2096 * @num: AC97 codec number
2097 *
2098 * Initialises AC97 codec resources for use by ad-hoc devices only.
2099 */
2100 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2101 struct snd_ac97_bus_ops *ops, int num)
2102 {
2103 mutex_lock(&codec->mutex);
2104
2105 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2106 if (codec->ac97 == NULL) {
2107 mutex_unlock(&codec->mutex);
2108 return -ENOMEM;
2109 }
2110
2111 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2112 if (codec->ac97->bus == NULL) {
2113 kfree(codec->ac97);
2114 codec->ac97 = NULL;
2115 mutex_unlock(&codec->mutex);
2116 return -ENOMEM;
2117 }
2118
2119 codec->ac97->bus->ops = ops;
2120 codec->ac97->num = num;
2121
2122 /*
2123 * Mark the AC97 device to be created by us. This way we ensure that the
2124 * device will be registered with the device subsystem later on.
2125 */
2126 codec->ac97_created = 1;
2127
2128 mutex_unlock(&codec->mutex);
2129 return 0;
2130 }
2131 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2132
2133 static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;
2134
2135 static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
2136 {
2137 struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2138
2139 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);
2140
2141 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);
2142
2143 udelay(10);
2144
2145 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2146
2147 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2148 msleep(2);
2149 }
2150
2151 static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
2152 {
2153 struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2154
2155 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);
2156
2157 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2158 gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
2159 gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);
2160
2161 udelay(10);
2162
2163 gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);
2164
2165 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2166 msleep(2);
2167 }
2168
2169 static int snd_soc_ac97_parse_pinctl(struct device *dev,
2170 struct snd_ac97_reset_cfg *cfg)
2171 {
2172 struct pinctrl *p;
2173 struct pinctrl_state *state;
2174 int gpio;
2175 int ret;
2176
2177 p = devm_pinctrl_get(dev);
2178 if (IS_ERR(p)) {
2179 dev_err(dev, "Failed to get pinctrl\n");
2180 return PTR_ERR(p);
2181 }
2182 cfg->pctl = p;
2183
2184 state = pinctrl_lookup_state(p, "ac97-reset");
2185 if (IS_ERR(state)) {
2186 dev_err(dev, "Can't find pinctrl state ac97-reset\n");
2187 return PTR_ERR(state);
2188 }
2189 cfg->pstate_reset = state;
2190
2191 state = pinctrl_lookup_state(p, "ac97-warm-reset");
2192 if (IS_ERR(state)) {
2193 dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
2194 return PTR_ERR(state);
2195 }
2196 cfg->pstate_warm_reset = state;
2197
2198 state = pinctrl_lookup_state(p, "ac97-running");
2199 if (IS_ERR(state)) {
2200 dev_err(dev, "Can't find pinctrl state ac97-running\n");
2201 return PTR_ERR(state);
2202 }
2203 cfg->pstate_run = state;
2204
2205 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
2206 if (gpio < 0) {
2207 dev_err(dev, "Can't find ac97-sync gpio\n");
2208 return gpio;
2209 }
2210 ret = devm_gpio_request(dev, gpio, "AC97 link sync");
2211 if (ret) {
2212 dev_err(dev, "Failed requesting ac97-sync gpio\n");
2213 return ret;
2214 }
2215 cfg->gpio_sync = gpio;
2216
2217 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
2218 if (gpio < 0) {
2219 dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
2220 return gpio;
2221 }
2222 ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
2223 if (ret) {
2224 dev_err(dev, "Failed requesting ac97-sdata gpio\n");
2225 return ret;
2226 }
2227 cfg->gpio_sdata = gpio;
2228
2229 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
2230 if (gpio < 0) {
2231 dev_err(dev, "Can't find ac97-reset gpio\n");
2232 return gpio;
2233 }
2234 ret = devm_gpio_request(dev, gpio, "AC97 link reset");
2235 if (ret) {
2236 dev_err(dev, "Failed requesting ac97-reset gpio\n");
2237 return ret;
2238 }
2239 cfg->gpio_reset = gpio;
2240
2241 return 0;
2242 }
2243
2244 struct snd_ac97_bus_ops *soc_ac97_ops;
2245 EXPORT_SYMBOL_GPL(soc_ac97_ops);
2246
2247 int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
2248 {
2249 if (ops == soc_ac97_ops)
2250 return 0;
2251
2252 if (soc_ac97_ops && ops)
2253 return -EBUSY;
2254
2255 soc_ac97_ops = ops;
2256
2257 return 0;
2258 }
2259 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);
2260
2261 /**
2262 * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions
2263 *
2264 * This function sets the reset and warm_reset properties of ops and parses
2265 * the device node of pdev to get pinctrl states and gpio numbers to use.
2266 */
2267 int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,
2268 struct platform_device *pdev)
2269 {
2270 struct device *dev = &pdev->dev;
2271 struct snd_ac97_reset_cfg cfg;
2272 int ret;
2273
2274 ret = snd_soc_ac97_parse_pinctl(dev, &cfg);
2275 if (ret)
2276 return ret;
2277
2278 ret = snd_soc_set_ac97_ops(ops);
2279 if (ret)
2280 return ret;
2281
2282 ops->warm_reset = snd_soc_ac97_warm_reset;
2283 ops->reset = snd_soc_ac97_reset;
2284
2285 snd_ac97_rst_cfg = cfg;
2286 return 0;
2287 }
2288 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);
2289
2290 /**
2291 * snd_soc_free_ac97_codec - free AC97 codec device
2292 * @codec: audio codec
2293 *
2294 * Frees AC97 codec device resources.
2295 */
2296 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2297 {
2298 mutex_lock(&codec->mutex);
2299 #ifdef CONFIG_SND_SOC_AC97_BUS
2300 soc_unregister_ac97_codec(codec);
2301 #endif
2302 kfree(codec->ac97->bus);
2303 kfree(codec->ac97);
2304 codec->ac97 = NULL;
2305 codec->ac97_created = 0;
2306 mutex_unlock(&codec->mutex);
2307 }
2308 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2309
2310 /**
2311 * snd_soc_cnew - create new control
2312 * @_template: control template
2313 * @data: control private data
2314 * @long_name: control long name
2315 * @prefix: control name prefix
2316 *
2317 * Create a new mixer control from a template control.
2318 *
2319 * Returns 0 for success, else error.
2320 */
2321 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2322 void *data, const char *long_name,
2323 const char *prefix)
2324 {
2325 struct snd_kcontrol_new template;
2326 struct snd_kcontrol *kcontrol;
2327 char *name = NULL;
2328
2329 memcpy(&template, _template, sizeof(template));
2330 template.index = 0;
2331
2332 if (!long_name)
2333 long_name = template.name;
2334
2335 if (prefix) {
2336 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2337 if (!name)
2338 return NULL;
2339
2340 template.name = name;
2341 } else {
2342 template.name = long_name;
2343 }
2344
2345 kcontrol = snd_ctl_new1(&template, data);
2346
2347 kfree(name);
2348
2349 return kcontrol;
2350 }
2351 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2352
2353 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2354 const struct snd_kcontrol_new *controls, int num_controls,
2355 const char *prefix, void *data)
2356 {
2357 int err, i;
2358
2359 for (i = 0; i < num_controls; i++) {
2360 const struct snd_kcontrol_new *control = &controls[i];
2361 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2362 control->name, prefix));
2363 if (err < 0) {
2364 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2365 control->name, err);
2366 return err;
2367 }
2368 }
2369
2370 return 0;
2371 }
2372
2373 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2374 const char *name)
2375 {
2376 struct snd_card *card = soc_card->snd_card;
2377 struct snd_kcontrol *kctl;
2378
2379 if (unlikely(!name))
2380 return NULL;
2381
2382 list_for_each_entry(kctl, &card->controls, list)
2383 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2384 return kctl;
2385 return NULL;
2386 }
2387 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2388
2389 /**
2390 * snd_soc_add_codec_controls - add an array of controls to a codec.
2391 * Convenience function to add a list of controls. Many codecs were
2392 * duplicating this code.
2393 *
2394 * @codec: codec to add controls to
2395 * @controls: array of controls to add
2396 * @num_controls: number of elements in the array
2397 *
2398 * Return 0 for success, else error.
2399 */
2400 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2401 const struct snd_kcontrol_new *controls, int num_controls)
2402 {
2403 struct snd_card *card = codec->card->snd_card;
2404
2405 return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2406 codec->name_prefix, &codec->component);
2407 }
2408 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2409
2410 /**
2411 * snd_soc_add_platform_controls - add an array of controls to a platform.
2412 * Convenience function to add a list of controls.
2413 *
2414 * @platform: platform to add controls to
2415 * @controls: array of controls to add
2416 * @num_controls: number of elements in the array
2417 *
2418 * Return 0 for success, else error.
2419 */
2420 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2421 const struct snd_kcontrol_new *controls, int num_controls)
2422 {
2423 struct snd_card *card = platform->card->snd_card;
2424
2425 return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2426 NULL, &platform->component);
2427 }
2428 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2429
2430 /**
2431 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2432 * Convenience function to add a list of controls.
2433 *
2434 * @soc_card: SoC card to add controls to
2435 * @controls: array of controls to add
2436 * @num_controls: number of elements in the array
2437 *
2438 * Return 0 for success, else error.
2439 */
2440 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2441 const struct snd_kcontrol_new *controls, int num_controls)
2442 {
2443 struct snd_card *card = soc_card->snd_card;
2444
2445 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2446 NULL, soc_card);
2447 }
2448 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2449
2450 /**
2451 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2452 * Convienience function to add a list of controls.
2453 *
2454 * @dai: DAI to add controls to
2455 * @controls: array of controls to add
2456 * @num_controls: number of elements in the array
2457 *
2458 * Return 0 for success, else error.
2459 */
2460 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2461 const struct snd_kcontrol_new *controls, int num_controls)
2462 {
2463 struct snd_card *card = dai->card->snd_card;
2464
2465 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2466 NULL, dai);
2467 }
2468 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2469
2470 /**
2471 * snd_soc_info_enum_double - enumerated double mixer info callback
2472 * @kcontrol: mixer control
2473 * @uinfo: control element information
2474 *
2475 * Callback to provide information about a double enumerated
2476 * mixer control.
2477 *
2478 * Returns 0 for success.
2479 */
2480 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2481 struct snd_ctl_elem_info *uinfo)
2482 {
2483 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2484
2485 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2486 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2487 uinfo->value.enumerated.items = e->items;
2488
2489 if (uinfo->value.enumerated.item >= e->items)
2490 uinfo->value.enumerated.item = e->items - 1;
2491 strlcpy(uinfo->value.enumerated.name,
2492 e->texts[uinfo->value.enumerated.item],
2493 sizeof(uinfo->value.enumerated.name));
2494 return 0;
2495 }
2496 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2497
2498 /**
2499 * snd_soc_get_enum_double - enumerated double mixer get callback
2500 * @kcontrol: mixer control
2501 * @ucontrol: control element information
2502 *
2503 * Callback to get the value of a double enumerated mixer.
2504 *
2505 * Returns 0 for success.
2506 */
2507 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2508 struct snd_ctl_elem_value *ucontrol)
2509 {
2510 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2511 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2512 unsigned int val, item;
2513 unsigned int reg_val;
2514 int ret;
2515
2516 ret = snd_soc_component_read(component, e->reg, &reg_val);
2517 if (ret)
2518 return ret;
2519 val = (reg_val >> e->shift_l) & e->mask;
2520 item = snd_soc_enum_val_to_item(e, val);
2521 ucontrol->value.enumerated.item[0] = item;
2522 if (e->shift_l != e->shift_r) {
2523 val = (reg_val >> e->shift_l) & e->mask;
2524 item = snd_soc_enum_val_to_item(e, val);
2525 ucontrol->value.enumerated.item[1] = item;
2526 }
2527
2528 return 0;
2529 }
2530 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2531
2532 /**
2533 * snd_soc_put_enum_double - enumerated double mixer put callback
2534 * @kcontrol: mixer control
2535 * @ucontrol: control element information
2536 *
2537 * Callback to set the value of a double enumerated mixer.
2538 *
2539 * Returns 0 for success.
2540 */
2541 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2542 struct snd_ctl_elem_value *ucontrol)
2543 {
2544 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2545 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2546 unsigned int *item = ucontrol->value.enumerated.item;
2547 unsigned int val;
2548 unsigned int mask;
2549
2550 if (item[0] >= e->items)
2551 return -EINVAL;
2552 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
2553 mask = e->mask << e->shift_l;
2554 if (e->shift_l != e->shift_r) {
2555 if (item[1] >= e->items)
2556 return -EINVAL;
2557 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
2558 mask |= e->mask << e->shift_r;
2559 }
2560
2561 return snd_soc_component_update_bits(component, e->reg, mask, val);
2562 }
2563 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2564
2565 /**
2566 * snd_soc_read_signed - Read a codec register and interprete as signed value
2567 * @component: component
2568 * @reg: Register to read
2569 * @mask: Mask to use after shifting the register value
2570 * @shift: Right shift of register value
2571 * @sign_bit: Bit that describes if a number is negative or not.
2572 * @signed_val: Pointer to where the read value should be stored
2573 *
2574 * This functions reads a codec register. The register value is shifted right
2575 * by 'shift' bits and masked with the given 'mask'. Afterwards it translates
2576 * the given registervalue into a signed integer if sign_bit is non-zero.
2577 *
2578 * Returns 0 on sucess, otherwise an error value
2579 */
2580 static int snd_soc_read_signed(struct snd_soc_component *component,
2581 unsigned int reg, unsigned int mask, unsigned int shift,
2582 unsigned int sign_bit, int *signed_val)
2583 {
2584 int ret;
2585 unsigned int val;
2586
2587 ret = snd_soc_component_read(component, reg, &val);
2588 if (ret < 0)
2589 return ret;
2590
2591 val = (val >> shift) & mask;
2592
2593 if (!sign_bit) {
2594 *signed_val = val;
2595 return 0;
2596 }
2597
2598 /* non-negative number */
2599 if (!(val & BIT(sign_bit))) {
2600 *signed_val = val;
2601 return 0;
2602 }
2603
2604 ret = val;
2605
2606 /*
2607 * The register most probably does not contain a full-sized int.
2608 * Instead we have an arbitrary number of bits in a signed
2609 * representation which has to be translated into a full-sized int.
2610 * This is done by filling up all bits above the sign-bit.
2611 */
2612 ret |= ~((int)(BIT(sign_bit) - 1));
2613
2614 *signed_val = ret;
2615
2616 return 0;
2617 }
2618
2619 /**
2620 * snd_soc_info_volsw - single mixer info callback
2621 * @kcontrol: mixer control
2622 * @uinfo: control element information
2623 *
2624 * Callback to provide information about a single mixer control, or a double
2625 * mixer control that spans 2 registers.
2626 *
2627 * Returns 0 for success.
2628 */
2629 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2630 struct snd_ctl_elem_info *uinfo)
2631 {
2632 struct soc_mixer_control *mc =
2633 (struct soc_mixer_control *)kcontrol->private_value;
2634 int platform_max;
2635
2636 if (!mc->platform_max)
2637 mc->platform_max = mc->max;
2638 platform_max = mc->platform_max;
2639
2640 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2641 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2642 else
2643 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2644
2645 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2646 uinfo->value.integer.min = 0;
2647 uinfo->value.integer.max = platform_max - mc->min;
2648 return 0;
2649 }
2650 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2651
2652 /**
2653 * snd_soc_get_volsw - single mixer get callback
2654 * @kcontrol: mixer control
2655 * @ucontrol: control element information
2656 *
2657 * Callback to get the value of a single mixer control, or a double mixer
2658 * control that spans 2 registers.
2659 *
2660 * Returns 0 for success.
2661 */
2662 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2663 struct snd_ctl_elem_value *ucontrol)
2664 {
2665 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2666 struct soc_mixer_control *mc =
2667 (struct soc_mixer_control *)kcontrol->private_value;
2668 unsigned int reg = mc->reg;
2669 unsigned int reg2 = mc->rreg;
2670 unsigned int shift = mc->shift;
2671 unsigned int rshift = mc->rshift;
2672 int max = mc->max;
2673 int min = mc->min;
2674 int sign_bit = mc->sign_bit;
2675 unsigned int mask = (1 << fls(max)) - 1;
2676 unsigned int invert = mc->invert;
2677 int val;
2678 int ret;
2679
2680 if (sign_bit)
2681 mask = BIT(sign_bit + 1) - 1;
2682
2683 ret = snd_soc_read_signed(component, reg, mask, shift, sign_bit, &val);
2684 if (ret)
2685 return ret;
2686
2687 ucontrol->value.integer.value[0] = val - min;
2688 if (invert)
2689 ucontrol->value.integer.value[0] =
2690 max - ucontrol->value.integer.value[0];
2691
2692 if (snd_soc_volsw_is_stereo(mc)) {
2693 if (reg == reg2)
2694 ret = snd_soc_read_signed(component, reg, mask, rshift,
2695 sign_bit, &val);
2696 else
2697 ret = snd_soc_read_signed(component, reg2, mask, shift,
2698 sign_bit, &val);
2699 if (ret)
2700 return ret;
2701
2702 ucontrol->value.integer.value[1] = val - min;
2703 if (invert)
2704 ucontrol->value.integer.value[1] =
2705 max - ucontrol->value.integer.value[1];
2706 }
2707
2708 return 0;
2709 }
2710 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2711
2712 /**
2713 * snd_soc_put_volsw - single mixer put callback
2714 * @kcontrol: mixer control
2715 * @ucontrol: control element information
2716 *
2717 * Callback to set the value of a single mixer control, or a double mixer
2718 * control that spans 2 registers.
2719 *
2720 * Returns 0 for success.
2721 */
2722 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2723 struct snd_ctl_elem_value *ucontrol)
2724 {
2725 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2726 struct soc_mixer_control *mc =
2727 (struct soc_mixer_control *)kcontrol->private_value;
2728 unsigned int reg = mc->reg;
2729 unsigned int reg2 = mc->rreg;
2730 unsigned int shift = mc->shift;
2731 unsigned int rshift = mc->rshift;
2732 int max = mc->max;
2733 int min = mc->min;
2734 unsigned int sign_bit = mc->sign_bit;
2735 unsigned int mask = (1 << fls(max)) - 1;
2736 unsigned int invert = mc->invert;
2737 int err;
2738 bool type_2r = false;
2739 unsigned int val2 = 0;
2740 unsigned int val, val_mask;
2741
2742 if (sign_bit)
2743 mask = BIT(sign_bit + 1) - 1;
2744
2745 val = ((ucontrol->value.integer.value[0] + min) & mask);
2746 if (invert)
2747 val = max - val;
2748 val_mask = mask << shift;
2749 val = val << shift;
2750 if (snd_soc_volsw_is_stereo(mc)) {
2751 val2 = ((ucontrol->value.integer.value[1] + min) & mask);
2752 if (invert)
2753 val2 = max - val2;
2754 if (reg == reg2) {
2755 val_mask |= mask << rshift;
2756 val |= val2 << rshift;
2757 } else {
2758 val2 = val2 << shift;
2759 type_2r = true;
2760 }
2761 }
2762 err = snd_soc_component_update_bits(component, reg, val_mask, val);
2763 if (err < 0)
2764 return err;
2765
2766 if (type_2r)
2767 err = snd_soc_component_update_bits(component, reg2, val_mask,
2768 val2);
2769
2770 return err;
2771 }
2772 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2773
2774 /**
2775 * snd_soc_get_volsw_sx - single mixer get callback
2776 * @kcontrol: mixer control
2777 * @ucontrol: control element information
2778 *
2779 * Callback to get the value of a single mixer control, or a double mixer
2780 * control that spans 2 registers.
2781 *
2782 * Returns 0 for success.
2783 */
2784 int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2785 struct snd_ctl_elem_value *ucontrol)
2786 {
2787 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2788 struct soc_mixer_control *mc =
2789 (struct soc_mixer_control *)kcontrol->private_value;
2790 unsigned int reg = mc->reg;
2791 unsigned int reg2 = mc->rreg;
2792 unsigned int shift = mc->shift;
2793 unsigned int rshift = mc->rshift;
2794 int max = mc->max;
2795 int min = mc->min;
2796 int mask = (1 << (fls(min + max) - 1)) - 1;
2797 unsigned int val;
2798 int ret;
2799
2800 ret = snd_soc_component_read(component, reg, &val);
2801 if (ret < 0)
2802 return ret;
2803
2804 ucontrol->value.integer.value[0] = ((val >> shift) - min) & mask;
2805
2806 if (snd_soc_volsw_is_stereo(mc)) {
2807 ret = snd_soc_component_read(component, reg2, &val);
2808 if (ret < 0)
2809 return ret;
2810
2811 val = ((val >> rshift) - min) & mask;
2812 ucontrol->value.integer.value[1] = val;
2813 }
2814
2815 return 0;
2816 }
2817 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2818
2819 /**
2820 * snd_soc_put_volsw_sx - double mixer set callback
2821 * @kcontrol: mixer control
2822 * @uinfo: control element information
2823 *
2824 * Callback to set the value of a double mixer control that spans 2 registers.
2825 *
2826 * Returns 0 for success.
2827 */
2828 int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2829 struct snd_ctl_elem_value *ucontrol)
2830 {
2831 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2832 struct soc_mixer_control *mc =
2833 (struct soc_mixer_control *)kcontrol->private_value;
2834
2835 unsigned int reg = mc->reg;
2836 unsigned int reg2 = mc->rreg;
2837 unsigned int shift = mc->shift;
2838 unsigned int rshift = mc->rshift;
2839 int max = mc->max;
2840 int min = mc->min;
2841 int mask = (1 << (fls(min + max) - 1)) - 1;
2842 int err = 0;
2843 unsigned int val, val_mask, val2 = 0;
2844
2845 val_mask = mask << shift;
2846 val = (ucontrol->value.integer.value[0] + min) & mask;
2847 val = val << shift;
2848
2849 err = snd_soc_component_update_bits(component, reg, val_mask, val);
2850 if (err < 0)
2851 return err;
2852
2853 if (snd_soc_volsw_is_stereo(mc)) {
2854 val_mask = mask << rshift;
2855 val2 = (ucontrol->value.integer.value[1] + min) & mask;
2856 val2 = val2 << rshift;
2857
2858 err = snd_soc_component_update_bits(component, reg2, val_mask,
2859 val2);
2860 }
2861 return err;
2862 }
2863 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2864
2865 /**
2866 * snd_soc_info_volsw_s8 - signed mixer info callback
2867 * @kcontrol: mixer control
2868 * @uinfo: control element information
2869 *
2870 * Callback to provide information about a signed mixer control.
2871 *
2872 * Returns 0 for success.
2873 */
2874 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2875 struct snd_ctl_elem_info *uinfo)
2876 {
2877 struct soc_mixer_control *mc =
2878 (struct soc_mixer_control *)kcontrol->private_value;
2879 int platform_max;
2880 int min = mc->min;
2881
2882 if (!mc->platform_max)
2883 mc->platform_max = mc->max;
2884 platform_max = mc->platform_max;
2885
2886 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2887 uinfo->count = 2;
2888 uinfo->value.integer.min = 0;
2889 uinfo->value.integer.max = platform_max - min;
2890 return 0;
2891 }
2892 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2893
2894 /**
2895 * snd_soc_get_volsw_s8 - signed mixer get callback
2896 * @kcontrol: mixer control
2897 * @ucontrol: control element information
2898 *
2899 * Callback to get the value of a signed mixer control.
2900 *
2901 * Returns 0 for success.
2902 */
2903 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2904 struct snd_ctl_elem_value *ucontrol)
2905 {
2906 struct soc_mixer_control *mc =
2907 (struct soc_mixer_control *)kcontrol->private_value;
2908 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2909 unsigned int reg = mc->reg;
2910 unsigned int val;
2911 int min = mc->min;
2912 int ret;
2913
2914 ret = snd_soc_component_read(component, reg, &val);
2915 if (ret)
2916 return ret;
2917
2918 ucontrol->value.integer.value[0] =
2919 ((signed char)(val & 0xff))-min;
2920 ucontrol->value.integer.value[1] =
2921 ((signed char)((val >> 8) & 0xff))-min;
2922 return 0;
2923 }
2924 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2925
2926 /**
2927 * snd_soc_put_volsw_sgn - signed mixer put callback
2928 * @kcontrol: mixer control
2929 * @ucontrol: control element information
2930 *
2931 * Callback to set the value of a signed mixer control.
2932 *
2933 * Returns 0 for success.
2934 */
2935 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2936 struct snd_ctl_elem_value *ucontrol)
2937 {
2938 struct soc_mixer_control *mc =
2939 (struct soc_mixer_control *)kcontrol->private_value;
2940 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2941 unsigned int reg = mc->reg;
2942 int min = mc->min;
2943 unsigned int val;
2944
2945 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2946 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2947
2948 return snd_soc_component_update_bits(component, reg, 0xffff, val);
2949 }
2950 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2951
2952 /**
2953 * snd_soc_info_volsw_range - single mixer info callback with range.
2954 * @kcontrol: mixer control
2955 * @uinfo: control element information
2956 *
2957 * Callback to provide information, within a range, about a single
2958 * mixer control.
2959 *
2960 * returns 0 for success.
2961 */
2962 int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
2963 struct snd_ctl_elem_info *uinfo)
2964 {
2965 struct soc_mixer_control *mc =
2966 (struct soc_mixer_control *)kcontrol->private_value;
2967 int platform_max;
2968 int min = mc->min;
2969
2970 if (!mc->platform_max)
2971 mc->platform_max = mc->max;
2972 platform_max = mc->platform_max;
2973
2974 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2975 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2976 uinfo->value.integer.min = 0;
2977 uinfo->value.integer.max = platform_max - min;
2978
2979 return 0;
2980 }
2981 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
2982
2983 /**
2984 * snd_soc_put_volsw_range - single mixer put value callback with range.
2985 * @kcontrol: mixer control
2986 * @ucontrol: control element information
2987 *
2988 * Callback to set the value, within a range, for a single mixer control.
2989 *
2990 * Returns 0 for success.
2991 */
2992 int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
2993 struct snd_ctl_elem_value *ucontrol)
2994 {
2995 struct soc_mixer_control *mc =
2996 (struct soc_mixer_control *)kcontrol->private_value;
2997 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2998 unsigned int reg = mc->reg;
2999 unsigned int rreg = mc->rreg;
3000 unsigned int shift = mc->shift;
3001 int min = mc->min;
3002 int max = mc->max;
3003 unsigned int mask = (1 << fls(max)) - 1;
3004 unsigned int invert = mc->invert;
3005 unsigned int val, val_mask;
3006 int ret;
3007
3008 val = ((ucontrol->value.integer.value[0] + min) & mask);
3009 if (invert)
3010 val = max - val;
3011 val_mask = mask << shift;
3012 val = val << shift;
3013
3014 ret = snd_soc_component_update_bits(component, reg, val_mask, val);
3015 if (ret < 0)
3016 return ret;
3017
3018 if (snd_soc_volsw_is_stereo(mc)) {
3019 val = ((ucontrol->value.integer.value[1] + min) & mask);
3020 if (invert)
3021 val = max - val;
3022 val_mask = mask << shift;
3023 val = val << shift;
3024
3025 ret = snd_soc_component_update_bits(component, rreg, val_mask,
3026 val);
3027 }
3028
3029 return ret;
3030 }
3031 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
3032
3033 /**
3034 * snd_soc_get_volsw_range - single mixer get callback with range
3035 * @kcontrol: mixer control
3036 * @ucontrol: control element information
3037 *
3038 * Callback to get the value, within a range, of a single mixer control.
3039 *
3040 * Returns 0 for success.
3041 */
3042 int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
3043 struct snd_ctl_elem_value *ucontrol)
3044 {
3045 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3046 struct soc_mixer_control *mc =
3047 (struct soc_mixer_control *)kcontrol->private_value;
3048 unsigned int reg = mc->reg;
3049 unsigned int rreg = mc->rreg;
3050 unsigned int shift = mc->shift;
3051 int min = mc->min;
3052 int max = mc->max;
3053 unsigned int mask = (1 << fls(max)) - 1;
3054 unsigned int invert = mc->invert;
3055 unsigned int val;
3056 int ret;
3057
3058 ret = snd_soc_component_read(component, reg, &val);
3059 if (ret)
3060 return ret;
3061
3062 ucontrol->value.integer.value[0] = (val >> shift) & mask;
3063 if (invert)
3064 ucontrol->value.integer.value[0] =
3065 max - ucontrol->value.integer.value[0];
3066 ucontrol->value.integer.value[0] =
3067 ucontrol->value.integer.value[0] - min;
3068
3069 if (snd_soc_volsw_is_stereo(mc)) {
3070 ret = snd_soc_component_read(component, rreg, &val);
3071 if (ret)
3072 return ret;
3073
3074 ucontrol->value.integer.value[1] = (val >> shift) & mask;
3075 if (invert)
3076 ucontrol->value.integer.value[1] =
3077 max - ucontrol->value.integer.value[1];
3078 ucontrol->value.integer.value[1] =
3079 ucontrol->value.integer.value[1] - min;
3080 }
3081
3082 return 0;
3083 }
3084 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
3085
3086 /**
3087 * snd_soc_limit_volume - Set new limit to an existing volume control.
3088 *
3089 * @codec: where to look for the control
3090 * @name: Name of the control
3091 * @max: new maximum limit
3092 *
3093 * Return 0 for success, else error.
3094 */
3095 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3096 const char *name, int max)
3097 {
3098 struct snd_card *card = codec->card->snd_card;
3099 struct snd_kcontrol *kctl;
3100 struct soc_mixer_control *mc;
3101 int found = 0;
3102 int ret = -EINVAL;
3103
3104 /* Sanity check for name and max */
3105 if (unlikely(!name || max <= 0))
3106 return -EINVAL;
3107
3108 list_for_each_entry(kctl, &card->controls, list) {
3109 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3110 found = 1;
3111 break;
3112 }
3113 }
3114 if (found) {
3115 mc = (struct soc_mixer_control *)kctl->private_value;
3116 if (max <= mc->max) {
3117 mc->platform_max = max;
3118 ret = 0;
3119 }
3120 }
3121 return ret;
3122 }
3123 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3124
3125 int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
3126 struct snd_ctl_elem_info *uinfo)
3127 {
3128 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3129 struct soc_bytes *params = (void *)kcontrol->private_value;
3130
3131 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3132 uinfo->count = params->num_regs * component->val_bytes;
3133
3134 return 0;
3135 }
3136 EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
3137
3138 int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
3139 struct snd_ctl_elem_value *ucontrol)
3140 {
3141 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3142 struct soc_bytes *params = (void *)kcontrol->private_value;
3143 int ret;
3144
3145 if (component->regmap)
3146 ret = regmap_raw_read(component->regmap, params->base,
3147 ucontrol->value.bytes.data,
3148 params->num_regs * component->val_bytes);
3149 else
3150 ret = -EINVAL;
3151
3152 /* Hide any masked bytes to ensure consistent data reporting */
3153 if (ret == 0 && params->mask) {
3154 switch (component->val_bytes) {
3155 case 1:
3156 ucontrol->value.bytes.data[0] &= ~params->mask;
3157 break;
3158 case 2:
3159 ((u16 *)(&ucontrol->value.bytes.data))[0]
3160 &= cpu_to_be16(~params->mask);
3161 break;
3162 case 4:
3163 ((u32 *)(&ucontrol->value.bytes.data))[0]
3164 &= cpu_to_be32(~params->mask);
3165 break;
3166 default:
3167 return -EINVAL;
3168 }
3169 }
3170
3171 return ret;
3172 }
3173 EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
3174
3175 int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
3176 struct snd_ctl_elem_value *ucontrol)
3177 {
3178 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3179 struct soc_bytes *params = (void *)kcontrol->private_value;
3180 int ret, len;
3181 unsigned int val, mask;
3182 void *data;
3183
3184 if (!component->regmap)
3185 return -EINVAL;
3186
3187 len = params->num_regs * component->val_bytes;
3188
3189 data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
3190 if (!data)
3191 return -ENOMEM;
3192
3193 /*
3194 * If we've got a mask then we need to preserve the register
3195 * bits. We shouldn't modify the incoming data so take a
3196 * copy.
3197 */
3198 if (params->mask) {
3199 ret = regmap_read(component->regmap, params->base, &val);
3200 if (ret != 0)
3201 goto out;
3202
3203 val &= params->mask;
3204
3205 switch (component->val_bytes) {
3206 case 1:
3207 ((u8 *)data)[0] &= ~params->mask;
3208 ((u8 *)data)[0] |= val;
3209 break;
3210 case 2:
3211 mask = ~params->mask;
3212 ret = regmap_parse_val(component->regmap,
3213 &mask, &mask);
3214 if (ret != 0)
3215 goto out;
3216
3217 ((u16 *)data)[0] &= mask;
3218
3219 ret = regmap_parse_val(component->regmap,
3220 &val, &val);
3221 if (ret != 0)
3222 goto out;
3223
3224 ((u16 *)data)[0] |= val;
3225 break;
3226 case 4:
3227 mask = ~params->mask;
3228 ret = regmap_parse_val(component->regmap,
3229 &mask, &mask);
3230 if (ret != 0)
3231 goto out;
3232
3233 ((u32 *)data)[0] &= mask;
3234
3235 ret = regmap_parse_val(component->regmap,
3236 &val, &val);
3237 if (ret != 0)
3238 goto out;
3239
3240 ((u32 *)data)[0] |= val;
3241 break;
3242 default:
3243 ret = -EINVAL;
3244 goto out;
3245 }
3246 }
3247
3248 ret = regmap_raw_write(component->regmap, params->base,
3249 data, len);
3250
3251 out:
3252 kfree(data);
3253
3254 return ret;
3255 }
3256 EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
3257
3258 int snd_soc_bytes_info_ext(struct snd_kcontrol *kcontrol,
3259 struct snd_ctl_elem_info *ucontrol)
3260 {
3261 struct soc_bytes_ext *params = (void *)kcontrol->private_value;
3262
3263 ucontrol->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3264 ucontrol->count = params->max;
3265
3266 return 0;
3267 }
3268 EXPORT_SYMBOL_GPL(snd_soc_bytes_info_ext);
3269
3270 /**
3271 * snd_soc_info_xr_sx - signed multi register info callback
3272 * @kcontrol: mreg control
3273 * @uinfo: control element information
3274 *
3275 * Callback to provide information of a control that can
3276 * span multiple codec registers which together
3277 * forms a single signed value in a MSB/LSB manner.
3278 *
3279 * Returns 0 for success.
3280 */
3281 int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
3282 struct snd_ctl_elem_info *uinfo)
3283 {
3284 struct soc_mreg_control *mc =
3285 (struct soc_mreg_control *)kcontrol->private_value;
3286 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3287 uinfo->count = 1;
3288 uinfo->value.integer.min = mc->min;
3289 uinfo->value.integer.max = mc->max;
3290
3291 return 0;
3292 }
3293 EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
3294
3295 /**
3296 * snd_soc_get_xr_sx - signed multi register get callback
3297 * @kcontrol: mreg control
3298 * @ucontrol: control element information
3299 *
3300 * Callback to get the value of a control that can span
3301 * multiple codec registers which together forms a single
3302 * signed value in a MSB/LSB manner. The control supports
3303 * specifying total no of bits used to allow for bitfields
3304 * across the multiple codec registers.
3305 *
3306 * Returns 0 for success.
3307 */
3308 int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
3309 struct snd_ctl_elem_value *ucontrol)
3310 {
3311 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3312 struct soc_mreg_control *mc =
3313 (struct soc_mreg_control *)kcontrol->private_value;
3314 unsigned int regbase = mc->regbase;
3315 unsigned int regcount = mc->regcount;
3316 unsigned int regwshift = component->val_bytes * BITS_PER_BYTE;
3317 unsigned int regwmask = (1<<regwshift)-1;
3318 unsigned int invert = mc->invert;
3319 unsigned long mask = (1UL<<mc->nbits)-1;
3320 long min = mc->min;
3321 long max = mc->max;
3322 long val = 0;
3323 unsigned int regval;
3324 unsigned int i;
3325 int ret;
3326
3327 for (i = 0; i < regcount; i++) {
3328 ret = snd_soc_component_read(component, regbase+i, &regval);
3329 if (ret)
3330 return ret;
3331 val |= (regval & regwmask) << (regwshift*(regcount-i-1));
3332 }
3333 val &= mask;
3334 if (min < 0 && val > max)
3335 val |= ~mask;
3336 if (invert)
3337 val = max - val;
3338 ucontrol->value.integer.value[0] = val;
3339
3340 return 0;
3341 }
3342 EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3343
3344 /**
3345 * snd_soc_put_xr_sx - signed multi register get callback
3346 * @kcontrol: mreg control
3347 * @ucontrol: control element information
3348 *
3349 * Callback to set the value of a control that can span
3350 * multiple codec registers which together forms a single
3351 * signed value in a MSB/LSB manner. The control supports
3352 * specifying total no of bits used to allow for bitfields
3353 * across the multiple codec registers.
3354 *
3355 * Returns 0 for success.
3356 */
3357 int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3358 struct snd_ctl_elem_value *ucontrol)
3359 {
3360 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3361 struct soc_mreg_control *mc =
3362 (struct soc_mreg_control *)kcontrol->private_value;
3363 unsigned int regbase = mc->regbase;
3364 unsigned int regcount = mc->regcount;
3365 unsigned int regwshift = component->val_bytes * BITS_PER_BYTE;
3366 unsigned int regwmask = (1<<regwshift)-1;
3367 unsigned int invert = mc->invert;
3368 unsigned long mask = (1UL<<mc->nbits)-1;
3369 long max = mc->max;
3370 long val = ucontrol->value.integer.value[0];
3371 unsigned int i, regval, regmask;
3372 int err;
3373
3374 if (invert)
3375 val = max - val;
3376 val &= mask;
3377 for (i = 0; i < regcount; i++) {
3378 regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3379 regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3380 err = snd_soc_component_update_bits(component, regbase+i,
3381 regmask, regval);
3382 if (err < 0)
3383 return err;
3384 }
3385
3386 return 0;
3387 }
3388 EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3389
3390 /**
3391 * snd_soc_get_strobe - strobe get callback
3392 * @kcontrol: mixer control
3393 * @ucontrol: control element information
3394 *
3395 * Callback get the value of a strobe mixer control.
3396 *
3397 * Returns 0 for success.
3398 */
3399 int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3400 struct snd_ctl_elem_value *ucontrol)
3401 {
3402 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3403 struct soc_mixer_control *mc =
3404 (struct soc_mixer_control *)kcontrol->private_value;
3405 unsigned int reg = mc->reg;
3406 unsigned int shift = mc->shift;
3407 unsigned int mask = 1 << shift;
3408 unsigned int invert = mc->invert != 0;
3409 unsigned int val;
3410 int ret;
3411
3412 ret = snd_soc_component_read(component, reg, &val);
3413 if (ret)
3414 return ret;
3415
3416 val &= mask;
3417
3418 if (shift != 0 && val != 0)
3419 val = val >> shift;
3420 ucontrol->value.enumerated.item[0] = val ^ invert;
3421
3422 return 0;
3423 }
3424 EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3425
3426 /**
3427 * snd_soc_put_strobe - strobe put callback
3428 * @kcontrol: mixer control
3429 * @ucontrol: control element information
3430 *
3431 * Callback strobe a register bit to high then low (or the inverse)
3432 * in one pass of a single mixer enum control.
3433 *
3434 * Returns 1 for success.
3435 */
3436 int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3437 struct snd_ctl_elem_value *ucontrol)
3438 {
3439 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3440 struct soc_mixer_control *mc =
3441 (struct soc_mixer_control *)kcontrol->private_value;
3442 unsigned int reg = mc->reg;
3443 unsigned int shift = mc->shift;
3444 unsigned int mask = 1 << shift;
3445 unsigned int invert = mc->invert != 0;
3446 unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3447 unsigned int val1 = (strobe ^ invert) ? mask : 0;
3448 unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3449 int err;
3450
3451 err = snd_soc_component_update_bits(component, reg, mask, val1);
3452 if (err < 0)
3453 return err;
3454
3455 return snd_soc_component_update_bits(component, reg, mask, val2);
3456 }
3457 EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3458
3459 /**
3460 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3461 * @dai: DAI
3462 * @clk_id: DAI specific clock ID
3463 * @freq: new clock frequency in Hz
3464 * @dir: new clock direction - input/output.
3465 *
3466 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3467 */
3468 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3469 unsigned int freq, int dir)
3470 {
3471 if (dai->driver && dai->driver->ops->set_sysclk)
3472 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3473 else if (dai->codec && dai->codec->driver->set_sysclk)
3474 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3475 freq, dir);
3476 else
3477 return -ENOTSUPP;
3478 }
3479 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3480
3481 /**
3482 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3483 * @codec: CODEC
3484 * @clk_id: DAI specific clock ID
3485 * @source: Source for the clock
3486 * @freq: new clock frequency in Hz
3487 * @dir: new clock direction - input/output.
3488 *
3489 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3490 */
3491 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3492 int source, unsigned int freq, int dir)
3493 {
3494 if (codec->driver->set_sysclk)
3495 return codec->driver->set_sysclk(codec, clk_id, source,
3496 freq, dir);
3497 else
3498 return -ENOTSUPP;
3499 }
3500 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3501
3502 /**
3503 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3504 * @dai: DAI
3505 * @div_id: DAI specific clock divider ID
3506 * @div: new clock divisor.
3507 *
3508 * Configures the clock dividers. This is used to derive the best DAI bit and
3509 * frame clocks from the system or master clock. It's best to set the DAI bit
3510 * and frame clocks as low as possible to save system power.
3511 */
3512 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3513 int div_id, int div)
3514 {
3515 if (dai->driver && dai->driver->ops->set_clkdiv)
3516 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3517 else
3518 return -EINVAL;
3519 }
3520 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3521
3522 /**
3523 * snd_soc_dai_set_pll - configure DAI PLL.
3524 * @dai: DAI
3525 * @pll_id: DAI specific PLL ID
3526 * @source: DAI specific source for the PLL
3527 * @freq_in: PLL input clock frequency in Hz
3528 * @freq_out: requested PLL output clock frequency in Hz
3529 *
3530 * Configures and enables PLL to generate output clock based on input clock.
3531 */
3532 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3533 unsigned int freq_in, unsigned int freq_out)
3534 {
3535 if (dai->driver && dai->driver->ops->set_pll)
3536 return dai->driver->ops->set_pll(dai, pll_id, source,
3537 freq_in, freq_out);
3538 else if (dai->codec && dai->codec->driver->set_pll)
3539 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3540 freq_in, freq_out);
3541 else
3542 return -EINVAL;
3543 }
3544 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3545
3546 /*
3547 * snd_soc_codec_set_pll - configure codec PLL.
3548 * @codec: CODEC
3549 * @pll_id: DAI specific PLL ID
3550 * @source: DAI specific source for the PLL
3551 * @freq_in: PLL input clock frequency in Hz
3552 * @freq_out: requested PLL output clock frequency in Hz
3553 *
3554 * Configures and enables PLL to generate output clock based on input clock.
3555 */
3556 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3557 unsigned int freq_in, unsigned int freq_out)
3558 {
3559 if (codec->driver->set_pll)
3560 return codec->driver->set_pll(codec, pll_id, source,
3561 freq_in, freq_out);
3562 else
3563 return -EINVAL;
3564 }
3565 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3566
3567 /**
3568 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
3569 * @dai: DAI
3570 * @ratio Ratio of BCLK to Sample rate.
3571 *
3572 * Configures the DAI for a preset BCLK to sample rate ratio.
3573 */
3574 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
3575 {
3576 if (dai->driver && dai->driver->ops->set_bclk_ratio)
3577 return dai->driver->ops->set_bclk_ratio(dai, ratio);
3578 else
3579 return -EINVAL;
3580 }
3581 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
3582
3583 /**
3584 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3585 * @dai: DAI
3586 * @fmt: SND_SOC_DAIFMT_ format value.
3587 *
3588 * Configures the DAI hardware format and clocking.
3589 */
3590 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3591 {
3592 if (dai->driver == NULL)
3593 return -EINVAL;
3594 if (dai->driver->ops->set_fmt == NULL)
3595 return -ENOTSUPP;
3596 return dai->driver->ops->set_fmt(dai, fmt);
3597 }
3598 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3599
3600 /**
3601 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
3602 * @slots: Number of slots in use.
3603 * @tx_mask: bitmask representing active TX slots.
3604 * @rx_mask: bitmask representing active RX slots.
3605 *
3606 * Generates the TDM tx and rx slot default masks for DAI.
3607 */
3608 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
3609 unsigned int *tx_mask,
3610 unsigned int *rx_mask)
3611 {
3612 if (*tx_mask || *rx_mask)
3613 return 0;
3614
3615 if (!slots)
3616 return -EINVAL;
3617
3618 *tx_mask = (1 << slots) - 1;
3619 *rx_mask = (1 << slots) - 1;
3620
3621 return 0;
3622 }
3623
3624 /**
3625 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3626 * @dai: DAI
3627 * @tx_mask: bitmask representing active TX slots.
3628 * @rx_mask: bitmask representing active RX slots.
3629 * @slots: Number of slots in use.
3630 * @slot_width: Width in bits for each slot.
3631 *
3632 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3633 * specific.
3634 */
3635 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3636 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3637 {
3638 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
3639 dai->driver->ops->xlate_tdm_slot_mask(slots,
3640 &tx_mask, &rx_mask);
3641 else
3642 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
3643
3644 if (dai->driver && dai->driver->ops->set_tdm_slot)
3645 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3646 slots, slot_width);
3647 else
3648 return -ENOTSUPP;
3649 }
3650 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3651
3652 /**
3653 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3654 * @dai: DAI
3655 * @tx_num: how many TX channels
3656 * @tx_slot: pointer to an array which imply the TX slot number channel
3657 * 0~num-1 uses
3658 * @rx_num: how many RX channels
3659 * @rx_slot: pointer to an array which imply the RX slot number channel
3660 * 0~num-1 uses
3661 *
3662 * configure the relationship between channel number and TDM slot number.
3663 */
3664 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3665 unsigned int tx_num, unsigned int *tx_slot,
3666 unsigned int rx_num, unsigned int *rx_slot)
3667 {
3668 if (dai->driver && dai->driver->ops->set_channel_map)
3669 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3670 rx_num, rx_slot);
3671 else
3672 return -EINVAL;
3673 }
3674 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3675
3676 /**
3677 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3678 * @dai: DAI
3679 * @tristate: tristate enable
3680 *
3681 * Tristates the DAI so that others can use it.
3682 */
3683 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3684 {
3685 if (dai->driver && dai->driver->ops->set_tristate)
3686 return dai->driver->ops->set_tristate(dai, tristate);
3687 else
3688 return -EINVAL;
3689 }
3690 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3691
3692 /**
3693 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3694 * @dai: DAI
3695 * @mute: mute enable
3696 * @direction: stream to mute
3697 *
3698 * Mutes the DAI DAC.
3699 */
3700 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
3701 int direction)
3702 {
3703 if (!dai->driver)
3704 return -ENOTSUPP;
3705
3706 if (dai->driver->ops->mute_stream)
3707 return dai->driver->ops->mute_stream(dai, mute, direction);
3708 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
3709 dai->driver->ops->digital_mute)
3710 return dai->driver->ops->digital_mute(dai, mute);
3711 else
3712 return -ENOTSUPP;
3713 }
3714 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3715
3716 /**
3717 * snd_soc_register_card - Register a card with the ASoC core
3718 *
3719 * @card: Card to register
3720 *
3721 */
3722 int snd_soc_register_card(struct snd_soc_card *card)
3723 {
3724 int i, ret;
3725
3726 if (!card->name || !card->dev)
3727 return -EINVAL;
3728
3729 for (i = 0; i < card->num_links; i++) {
3730 struct snd_soc_dai_link *link = &card->dai_link[i];
3731
3732 /*
3733 * Codec must be specified by 1 of name or OF node,
3734 * not both or neither.
3735 */
3736 if (!!link->codec_name == !!link->codec_of_node) {
3737 dev_err(card->dev,
3738 "ASoC: Neither/both codec name/of_node are set for %s\n",
3739 link->name);
3740 return -EINVAL;
3741 }
3742 /* Codec DAI name must be specified */
3743 if (!link->codec_dai_name) {
3744 dev_err(card->dev,
3745 "ASoC: codec_dai_name not set for %s\n",
3746 link->name);
3747 return -EINVAL;
3748 }
3749
3750 /*
3751 * Platform may be specified by either name or OF node, but
3752 * can be left unspecified, and a dummy platform will be used.
3753 */
3754 if (link->platform_name && link->platform_of_node) {
3755 dev_err(card->dev,
3756 "ASoC: Both platform name/of_node are set for %s\n",
3757 link->name);
3758 return -EINVAL;
3759 }
3760
3761 /*
3762 * CPU device may be specified by either name or OF node, but
3763 * can be left unspecified, and will be matched based on DAI
3764 * name alone..
3765 */
3766 if (link->cpu_name && link->cpu_of_node) {
3767 dev_err(card->dev,
3768 "ASoC: Neither/both cpu name/of_node are set for %s\n",
3769 link->name);
3770 return -EINVAL;
3771 }
3772 /*
3773 * At least one of CPU DAI name or CPU device name/node must be
3774 * specified
3775 */
3776 if (!link->cpu_dai_name &&
3777 !(link->cpu_name || link->cpu_of_node)) {
3778 dev_err(card->dev,
3779 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
3780 link->name);
3781 return -EINVAL;
3782 }
3783 }
3784
3785 dev_set_drvdata(card->dev, card);
3786
3787 snd_soc_initialize_card_lists(card);
3788
3789 soc_init_card_debugfs(card);
3790
3791 card->rtd = devm_kzalloc(card->dev,
3792 sizeof(struct snd_soc_pcm_runtime) *
3793 (card->num_links + card->num_aux_devs),
3794 GFP_KERNEL);
3795 if (card->rtd == NULL)
3796 return -ENOMEM;
3797 card->num_rtd = 0;
3798 card->rtd_aux = &card->rtd[card->num_links];
3799
3800 for (i = 0; i < card->num_links; i++)
3801 card->rtd[i].dai_link = &card->dai_link[i];
3802
3803 INIT_LIST_HEAD(&card->dapm_dirty);
3804 card->instantiated = 0;
3805 mutex_init(&card->mutex);
3806 mutex_init(&card->dapm_mutex);
3807
3808 ret = snd_soc_instantiate_card(card);
3809 if (ret != 0)
3810 soc_cleanup_card_debugfs(card);
3811
3812 /* deactivate pins to sleep state */
3813 for (i = 0; i < card->num_rtd; i++) {
3814 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
3815 struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
3816 if (!codec_dai->active)
3817 pinctrl_pm_select_sleep_state(codec_dai->dev);
3818 if (!cpu_dai->active)
3819 pinctrl_pm_select_sleep_state(cpu_dai->dev);
3820 }
3821
3822 return ret;
3823 }
3824 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3825
3826 /**
3827 * snd_soc_unregister_card - Unregister a card with the ASoC core
3828 *
3829 * @card: Card to unregister
3830 *
3831 */
3832 int snd_soc_unregister_card(struct snd_soc_card *card)
3833 {
3834 if (card->instantiated)
3835 soc_cleanup_card_resources(card);
3836 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3837
3838 return 0;
3839 }
3840 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3841
3842 /*
3843 * Simplify DAI link configuration by removing ".-1" from device names
3844 * and sanitizing names.
3845 */
3846 static char *fmt_single_name(struct device *dev, int *id)
3847 {
3848 char *found, name[NAME_SIZE];
3849 int id1, id2;
3850
3851 if (dev_name(dev) == NULL)
3852 return NULL;
3853
3854 strlcpy(name, dev_name(dev), NAME_SIZE);
3855
3856 /* are we a "%s.%d" name (platform and SPI components) */
3857 found = strstr(name, dev->driver->name);
3858 if (found) {
3859 /* get ID */
3860 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3861
3862 /* discard ID from name if ID == -1 */
3863 if (*id == -1)
3864 found[strlen(dev->driver->name)] = '\0';
3865 }
3866
3867 } else {
3868 /* I2C component devices are named "bus-addr" */
3869 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3870 char tmp[NAME_SIZE];
3871
3872 /* create unique ID number from I2C addr and bus */
3873 *id = ((id1 & 0xffff) << 16) + id2;
3874
3875 /* sanitize component name for DAI link creation */
3876 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3877 strlcpy(name, tmp, NAME_SIZE);
3878 } else
3879 *id = 0;
3880 }
3881
3882 return kstrdup(name, GFP_KERNEL);
3883 }
3884
3885 /*
3886 * Simplify DAI link naming for single devices with multiple DAIs by removing
3887 * any ".-1" and using the DAI name (instead of device name).
3888 */
3889 static inline char *fmt_multiple_name(struct device *dev,
3890 struct snd_soc_dai_driver *dai_drv)
3891 {
3892 if (dai_drv->name == NULL) {
3893 dev_err(dev,
3894 "ASoC: error - multiple DAI %s registered with no name\n",
3895 dev_name(dev));
3896 return NULL;
3897 }
3898
3899 return kstrdup(dai_drv->name, GFP_KERNEL);
3900 }
3901
3902 /**
3903 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
3904 *
3905 * @component: The component for which the DAIs should be unregistered
3906 */
3907 static void snd_soc_unregister_dais(struct snd_soc_component *component)
3908 {
3909 struct snd_soc_dai *dai, *_dai;
3910
3911 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
3912 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
3913 dai->name);
3914 list_del(&dai->list);
3915 kfree(dai->name);
3916 kfree(dai);
3917 }
3918 }
3919
3920 /**
3921 * snd_soc_register_dais - Register a DAI with the ASoC core
3922 *
3923 * @component: The component the DAIs are registered for
3924 * @codec: The CODEC that the DAIs are registered for, NULL if the component is
3925 * not a CODEC.
3926 * @dai_drv: DAI driver to use for the DAIs
3927 * @count: Number of DAIs
3928 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3929 * parent's name.
3930 */
3931 static int snd_soc_register_dais(struct snd_soc_component *component,
3932 struct snd_soc_codec *codec, struct snd_soc_dai_driver *dai_drv,
3933 size_t count, bool legacy_dai_naming)
3934 {
3935 struct device *dev = component->dev;
3936 struct snd_soc_dai *dai;
3937 unsigned int i;
3938 int ret;
3939
3940 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
3941
3942 for (i = 0; i < count; i++) {
3943
3944 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3945 if (dai == NULL) {
3946 ret = -ENOMEM;
3947 goto err;
3948 }
3949
3950 /*
3951 * Back in the old days when we still had component-less DAIs,
3952 * instead of having a static name, component-less DAIs would
3953 * inherit the name of the parent device so it is possible to
3954 * register multiple instances of the DAI. We still need to keep
3955 * the same naming style even though those DAIs are not
3956 * component-less anymore.
3957 */
3958 if (count == 1 && legacy_dai_naming) {
3959 dai->name = fmt_single_name(dev, &dai->id);
3960 } else {
3961 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3962 if (dai_drv[i].id)
3963 dai->id = dai_drv[i].id;
3964 else
3965 dai->id = i;
3966 }
3967 if (dai->name == NULL) {
3968 kfree(dai);
3969 ret = -ENOMEM;
3970 goto err;
3971 }
3972
3973 dai->component = component;
3974 dai->codec = codec;
3975 dai->dev = dev;
3976 dai->driver = &dai_drv[i];
3977 dai->dapm.dev = dev;
3978 if (!dai->driver->ops)
3979 dai->driver->ops = &null_dai_ops;
3980
3981 if (!dai->codec)
3982 dai->dapm.idle_bias_off = 1;
3983
3984 list_add(&dai->list, &component->dai_list);
3985
3986 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3987 }
3988
3989 return 0;
3990
3991 err:
3992 snd_soc_unregister_dais(component);
3993
3994 return ret;
3995 }
3996
3997 /**
3998 * snd_soc_register_component - Register a component with the ASoC core
3999 *
4000 */
4001 static int
4002 __snd_soc_register_component(struct device *dev,
4003 struct snd_soc_component *cmpnt,
4004 const struct snd_soc_component_driver *cmpnt_drv,
4005 struct snd_soc_codec *codec,
4006 struct snd_soc_dai_driver *dai_drv,
4007 int num_dai, bool allow_single_dai)
4008 {
4009 int ret;
4010
4011 dev_dbg(dev, "component register %s\n", dev_name(dev));
4012
4013 if (!cmpnt) {
4014 dev_err(dev, "ASoC: Failed to connecting component\n");
4015 return -ENOMEM;
4016 }
4017
4018 mutex_init(&cmpnt->io_mutex);
4019
4020 cmpnt->name = fmt_single_name(dev, &cmpnt->id);
4021 if (!cmpnt->name) {
4022 dev_err(dev, "ASoC: Failed to simplifying name\n");
4023 return -ENOMEM;
4024 }
4025
4026 cmpnt->dev = dev;
4027 cmpnt->driver = cmpnt_drv;
4028 cmpnt->dai_drv = dai_drv;
4029 cmpnt->num_dai = num_dai;
4030 INIT_LIST_HEAD(&cmpnt->dai_list);
4031
4032 ret = snd_soc_register_dais(cmpnt, codec, dai_drv, num_dai,
4033 allow_single_dai);
4034 if (ret < 0) {
4035 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4036 goto error_component_name;
4037 }
4038
4039 mutex_lock(&client_mutex);
4040 list_add(&cmpnt->list, &component_list);
4041 mutex_unlock(&client_mutex);
4042
4043 dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);
4044
4045 return ret;
4046
4047 error_component_name:
4048 kfree(cmpnt->name);
4049
4050 return ret;
4051 }
4052
4053 int snd_soc_register_component(struct device *dev,
4054 const struct snd_soc_component_driver *cmpnt_drv,
4055 struct snd_soc_dai_driver *dai_drv,
4056 int num_dai)
4057 {
4058 struct snd_soc_component *cmpnt;
4059
4060 cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
4061 if (!cmpnt) {
4062 dev_err(dev, "ASoC: Failed to allocate memory\n");
4063 return -ENOMEM;
4064 }
4065
4066 cmpnt->ignore_pmdown_time = true;
4067 cmpnt->registered_as_component = true;
4068
4069 return __snd_soc_register_component(dev, cmpnt, cmpnt_drv, NULL,
4070 dai_drv, num_dai, true);
4071 }
4072 EXPORT_SYMBOL_GPL(snd_soc_register_component);
4073
4074 static void __snd_soc_unregister_component(struct snd_soc_component *cmpnt)
4075 {
4076 snd_soc_unregister_dais(cmpnt);
4077
4078 mutex_lock(&client_mutex);
4079 list_del(&cmpnt->list);
4080 mutex_unlock(&client_mutex);
4081
4082 dev_dbg(cmpnt->dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
4083 kfree(cmpnt->name);
4084 }
4085
4086 /**
4087 * snd_soc_unregister_component - Unregister a component from the ASoC core
4088 *
4089 */
4090 void snd_soc_unregister_component(struct device *dev)
4091 {
4092 struct snd_soc_component *cmpnt;
4093
4094 list_for_each_entry(cmpnt, &component_list, list) {
4095 if (dev == cmpnt->dev && cmpnt->registered_as_component)
4096 goto found;
4097 }
4098 return;
4099
4100 found:
4101 __snd_soc_unregister_component(cmpnt);
4102 }
4103 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
4104
4105 static int snd_soc_platform_drv_write(struct snd_soc_component *component,
4106 unsigned int reg, unsigned int val)
4107 {
4108 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
4109
4110 return platform->driver->write(platform, reg, val);
4111 }
4112
4113 static int snd_soc_platform_drv_read(struct snd_soc_component *component,
4114 unsigned int reg, unsigned int *val)
4115 {
4116 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
4117
4118 *val = platform->driver->read(platform, reg);
4119
4120 return 0;
4121 }
4122
4123 /**
4124 * snd_soc_add_platform - Add a platform to the ASoC core
4125 * @dev: The parent device for the platform
4126 * @platform: The platform to add
4127 * @platform_driver: The driver for the platform
4128 */
4129 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
4130 const struct snd_soc_platform_driver *platform_drv)
4131 {
4132 int ret;
4133
4134 /* create platform component name */
4135 platform->name = fmt_single_name(dev, &platform->id);
4136 if (platform->name == NULL)
4137 return -ENOMEM;
4138
4139 platform->dev = dev;
4140 platform->driver = platform_drv;
4141 platform->dapm.dev = dev;
4142 platform->dapm.platform = platform;
4143 platform->dapm.component = &platform->component;
4144 platform->dapm.stream_event = platform_drv->stream_event;
4145 if (platform_drv->write)
4146 platform->component.write = snd_soc_platform_drv_write;
4147 if (platform_drv->read)
4148 platform->component.read = snd_soc_platform_drv_read;
4149
4150 /* register component */
4151 ret = __snd_soc_register_component(dev, &platform->component,
4152 &platform_drv->component_driver,
4153 NULL, NULL, 0, false);
4154 if (ret < 0) {
4155 dev_err(platform->component.dev,
4156 "ASoC: Failed to register component: %d\n", ret);
4157 return ret;
4158 }
4159
4160 mutex_lock(&client_mutex);
4161 list_add(&platform->list, &platform_list);
4162 mutex_unlock(&client_mutex);
4163
4164 dev_dbg(dev, "ASoC: Registered platform '%s'\n", platform->name);
4165
4166 return 0;
4167 }
4168 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
4169
4170 /**
4171 * snd_soc_register_platform - Register a platform with the ASoC core
4172 *
4173 * @platform: platform to register
4174 */
4175 int snd_soc_register_platform(struct device *dev,
4176 const struct snd_soc_platform_driver *platform_drv)
4177 {
4178 struct snd_soc_platform *platform;
4179 int ret;
4180
4181 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
4182
4183 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
4184 if (platform == NULL)
4185 return -ENOMEM;
4186
4187 ret = snd_soc_add_platform(dev, platform, platform_drv);
4188 if (ret)
4189 kfree(platform);
4190
4191 return ret;
4192 }
4193 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
4194
4195 /**
4196 * snd_soc_remove_platform - Remove a platform from the ASoC core
4197 * @platform: the platform to remove
4198 */
4199 void snd_soc_remove_platform(struct snd_soc_platform *platform)
4200 {
4201 __snd_soc_unregister_component(&platform->component);
4202
4203 mutex_lock(&client_mutex);
4204 list_del(&platform->list);
4205 mutex_unlock(&client_mutex);
4206
4207 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
4208 platform->name);
4209 kfree(platform->name);
4210 }
4211 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
4212
4213 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
4214 {
4215 struct snd_soc_platform *platform;
4216
4217 list_for_each_entry(platform, &platform_list, list) {
4218 if (dev == platform->dev)
4219 return platform;
4220 }
4221
4222 return NULL;
4223 }
4224 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
4225
4226 /**
4227 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
4228 *
4229 * @platform: platform to unregister
4230 */
4231 void snd_soc_unregister_platform(struct device *dev)
4232 {
4233 struct snd_soc_platform *platform;
4234
4235 platform = snd_soc_lookup_platform(dev);
4236 if (!platform)
4237 return;
4238
4239 snd_soc_remove_platform(platform);
4240 kfree(platform);
4241 }
4242 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
4243
4244 static u64 codec_format_map[] = {
4245 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
4246 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
4247 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
4248 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
4249 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
4250 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
4251 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4252 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4253 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
4254 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
4255 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
4256 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
4257 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
4258 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
4259 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
4260 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
4261 };
4262
4263 /* Fix up the DAI formats for endianness: codecs don't actually see
4264 * the endianness of the data but we're using the CPU format
4265 * definitions which do need to include endianness so we ensure that
4266 * codec DAIs always have both big and little endian variants set.
4267 */
4268 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
4269 {
4270 int i;
4271
4272 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
4273 if (stream->formats & codec_format_map[i])
4274 stream->formats |= codec_format_map[i];
4275 }
4276
4277 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
4278 unsigned int reg, unsigned int val)
4279 {
4280 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
4281
4282 return codec->driver->write(codec, reg, val);
4283 }
4284
4285 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
4286 unsigned int reg, unsigned int *val)
4287 {
4288 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
4289
4290 *val = codec->driver->read(codec, reg);
4291
4292 return 0;
4293 }
4294
4295 /**
4296 * snd_soc_register_codec - Register a codec with the ASoC core
4297 *
4298 * @codec: codec to register
4299 */
4300 int snd_soc_register_codec(struct device *dev,
4301 const struct snd_soc_codec_driver *codec_drv,
4302 struct snd_soc_dai_driver *dai_drv,
4303 int num_dai)
4304 {
4305 struct snd_soc_codec *codec;
4306 struct regmap *regmap;
4307 int ret, i;
4308
4309 dev_dbg(dev, "codec register %s\n", dev_name(dev));
4310
4311 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
4312 if (codec == NULL)
4313 return -ENOMEM;
4314
4315 /* create CODEC component name */
4316 codec->name = fmt_single_name(dev, &codec->id);
4317 if (codec->name == NULL) {
4318 ret = -ENOMEM;
4319 goto fail_codec;
4320 }
4321
4322 if (codec_drv->write)
4323 codec->component.write = snd_soc_codec_drv_write;
4324 if (codec_drv->read)
4325 codec->component.read = snd_soc_codec_drv_read;
4326 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
4327 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
4328 codec->dapm.dev = dev;
4329 codec->dapm.codec = codec;
4330 codec->dapm.component = &codec->component;
4331 codec->dapm.seq_notifier = codec_drv->seq_notifier;
4332 codec->dapm.stream_event = codec_drv->stream_event;
4333 codec->dev = dev;
4334 codec->driver = codec_drv;
4335 codec->component.val_bytes = codec_drv->reg_word_size;
4336 mutex_init(&codec->mutex);
4337
4338 if (!codec->component.write) {
4339 if (codec_drv->get_regmap)
4340 regmap = codec_drv->get_regmap(dev);
4341 else
4342 regmap = dev_get_regmap(dev, NULL);
4343
4344 if (regmap) {
4345 ret = snd_soc_component_init_io(&codec->component,
4346 regmap);
4347 if (ret) {
4348 dev_err(codec->dev,
4349 "Failed to set cache I/O:%d\n",
4350 ret);
4351 return ret;
4352 }
4353 }
4354 }
4355
4356 for (i = 0; i < num_dai; i++) {
4357 fixup_codec_formats(&dai_drv[i].playback);
4358 fixup_codec_formats(&dai_drv[i].capture);
4359 }
4360
4361 mutex_lock(&client_mutex);
4362 list_add(&codec->list, &codec_list);
4363 mutex_unlock(&client_mutex);
4364
4365 /* register component */
4366 ret = __snd_soc_register_component(dev, &codec->component,
4367 &codec_drv->component_driver,
4368 codec, dai_drv, num_dai, false);
4369 if (ret < 0) {
4370 dev_err(codec->dev, "ASoC: Failed to regster component: %d\n", ret);
4371 goto fail_codec_name;
4372 }
4373
4374 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", codec->name);
4375 return 0;
4376
4377 fail_codec_name:
4378 mutex_lock(&client_mutex);
4379 list_del(&codec->list);
4380 mutex_unlock(&client_mutex);
4381
4382 kfree(codec->name);
4383 fail_codec:
4384 kfree(codec);
4385 return ret;
4386 }
4387 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4388
4389 /**
4390 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4391 *
4392 * @codec: codec to unregister
4393 */
4394 void snd_soc_unregister_codec(struct device *dev)
4395 {
4396 struct snd_soc_codec *codec;
4397
4398 list_for_each_entry(codec, &codec_list, list) {
4399 if (dev == codec->dev)
4400 goto found;
4401 }
4402 return;
4403
4404 found:
4405 __snd_soc_unregister_component(&codec->component);
4406
4407 mutex_lock(&client_mutex);
4408 list_del(&codec->list);
4409 mutex_unlock(&client_mutex);
4410
4411 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
4412
4413 snd_soc_cache_exit(codec);
4414 kfree(codec->name);
4415 kfree(codec);
4416 }
4417 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4418
4419 /* Retrieve a card's name from device tree */
4420 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4421 const char *propname)
4422 {
4423 struct device_node *np = card->dev->of_node;
4424 int ret;
4425
4426 ret = of_property_read_string_index(np, propname, 0, &card->name);
4427 /*
4428 * EINVAL means the property does not exist. This is fine providing
4429 * card->name was previously set, which is checked later in
4430 * snd_soc_register_card.
4431 */
4432 if (ret < 0 && ret != -EINVAL) {
4433 dev_err(card->dev,
4434 "ASoC: Property '%s' could not be read: %d\n",
4435 propname, ret);
4436 return ret;
4437 }
4438
4439 return 0;
4440 }
4441 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4442
4443 static const struct snd_soc_dapm_widget simple_widgets[] = {
4444 SND_SOC_DAPM_MIC("Microphone", NULL),
4445 SND_SOC_DAPM_LINE("Line", NULL),
4446 SND_SOC_DAPM_HP("Headphone", NULL),
4447 SND_SOC_DAPM_SPK("Speaker", NULL),
4448 };
4449
4450 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
4451 const char *propname)
4452 {
4453 struct device_node *np = card->dev->of_node;
4454 struct snd_soc_dapm_widget *widgets;
4455 const char *template, *wname;
4456 int i, j, num_widgets, ret;
4457
4458 num_widgets = of_property_count_strings(np, propname);
4459 if (num_widgets < 0) {
4460 dev_err(card->dev,
4461 "ASoC: Property '%s' does not exist\n", propname);
4462 return -EINVAL;
4463 }
4464 if (num_widgets & 1) {
4465 dev_err(card->dev,
4466 "ASoC: Property '%s' length is not even\n", propname);
4467 return -EINVAL;
4468 }
4469
4470 num_widgets /= 2;
4471 if (!num_widgets) {
4472 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4473 propname);
4474 return -EINVAL;
4475 }
4476
4477 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
4478 GFP_KERNEL);
4479 if (!widgets) {
4480 dev_err(card->dev,
4481 "ASoC: Could not allocate memory for widgets\n");
4482 return -ENOMEM;
4483 }
4484
4485 for (i = 0; i < num_widgets; i++) {
4486 ret = of_property_read_string_index(np, propname,
4487 2 * i, &template);
4488 if (ret) {
4489 dev_err(card->dev,
4490 "ASoC: Property '%s' index %d read error:%d\n",
4491 propname, 2 * i, ret);
4492 return -EINVAL;
4493 }
4494
4495 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
4496 if (!strncmp(template, simple_widgets[j].name,
4497 strlen(simple_widgets[j].name))) {
4498 widgets[i] = simple_widgets[j];
4499 break;
4500 }
4501 }
4502
4503 if (j >= ARRAY_SIZE(simple_widgets)) {
4504 dev_err(card->dev,
4505 "ASoC: DAPM widget '%s' is not supported\n",
4506 template);
4507 return -EINVAL;
4508 }
4509
4510 ret = of_property_read_string_index(np, propname,
4511 (2 * i) + 1,
4512 &wname);
4513 if (ret) {
4514 dev_err(card->dev,
4515 "ASoC: Property '%s' index %d read error:%d\n",
4516 propname, (2 * i) + 1, ret);
4517 return -EINVAL;
4518 }
4519
4520 widgets[i].name = wname;
4521 }
4522
4523 card->dapm_widgets = widgets;
4524 card->num_dapm_widgets = num_widgets;
4525
4526 return 0;
4527 }
4528 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
4529
4530 int snd_soc_of_parse_tdm_slot(struct device_node *np,
4531 unsigned int *slots,
4532 unsigned int *slot_width)
4533 {
4534 u32 val;
4535 int ret;
4536
4537 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
4538 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
4539 if (ret)
4540 return ret;
4541
4542 if (slots)
4543 *slots = val;
4544 }
4545
4546 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
4547 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
4548 if (ret)
4549 return ret;
4550
4551 if (slot_width)
4552 *slot_width = val;
4553 }
4554
4555 return 0;
4556 }
4557 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
4558
4559 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4560 const char *propname)
4561 {
4562 struct device_node *np = card->dev->of_node;
4563 int num_routes;
4564 struct snd_soc_dapm_route *routes;
4565 int i, ret;
4566
4567 num_routes = of_property_count_strings(np, propname);
4568 if (num_routes < 0 || num_routes & 1) {
4569 dev_err(card->dev,
4570 "ASoC: Property '%s' does not exist or its length is not even\n",
4571 propname);
4572 return -EINVAL;
4573 }
4574 num_routes /= 2;
4575 if (!num_routes) {
4576 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4577 propname);
4578 return -EINVAL;
4579 }
4580
4581 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4582 GFP_KERNEL);
4583 if (!routes) {
4584 dev_err(card->dev,
4585 "ASoC: Could not allocate DAPM route table\n");
4586 return -EINVAL;
4587 }
4588
4589 for (i = 0; i < num_routes; i++) {
4590 ret = of_property_read_string_index(np, propname,
4591 2 * i, &routes[i].sink);
4592 if (ret) {
4593 dev_err(card->dev,
4594 "ASoC: Property '%s' index %d could not be read: %d\n",
4595 propname, 2 * i, ret);
4596 return -EINVAL;
4597 }
4598 ret = of_property_read_string_index(np, propname,
4599 (2 * i) + 1, &routes[i].source);
4600 if (ret) {
4601 dev_err(card->dev,
4602 "ASoC: Property '%s' index %d could not be read: %d\n",
4603 propname, (2 * i) + 1, ret);
4604 return -EINVAL;
4605 }
4606 }
4607
4608 card->num_dapm_routes = num_routes;
4609 card->dapm_routes = routes;
4610
4611 return 0;
4612 }
4613 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4614
4615 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4616 const char *prefix,
4617 struct device_node **bitclkmaster,
4618 struct device_node **framemaster)
4619 {
4620 int ret, i;
4621 char prop[128];
4622 unsigned int format = 0;
4623 int bit, frame;
4624 const char *str;
4625 struct {
4626 char *name;
4627 unsigned int val;
4628 } of_fmt_table[] = {
4629 { "i2s", SND_SOC_DAIFMT_I2S },
4630 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
4631 { "left_j", SND_SOC_DAIFMT_LEFT_J },
4632 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
4633 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
4634 { "ac97", SND_SOC_DAIFMT_AC97 },
4635 { "pdm", SND_SOC_DAIFMT_PDM},
4636 { "msb", SND_SOC_DAIFMT_MSB },
4637 { "lsb", SND_SOC_DAIFMT_LSB },
4638 };
4639
4640 if (!prefix)
4641 prefix = "";
4642
4643 /*
4644 * check "[prefix]format = xxx"
4645 * SND_SOC_DAIFMT_FORMAT_MASK area
4646 */
4647 snprintf(prop, sizeof(prop), "%sformat", prefix);
4648 ret = of_property_read_string(np, prop, &str);
4649 if (ret == 0) {
4650 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4651 if (strcmp(str, of_fmt_table[i].name) == 0) {
4652 format |= of_fmt_table[i].val;
4653 break;
4654 }
4655 }
4656 }
4657
4658 /*
4659 * check "[prefix]continuous-clock"
4660 * SND_SOC_DAIFMT_CLOCK_MASK area
4661 */
4662 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4663 if (of_get_property(np, prop, NULL))
4664 format |= SND_SOC_DAIFMT_CONT;
4665 else
4666 format |= SND_SOC_DAIFMT_GATED;
4667
4668 /*
4669 * check "[prefix]bitclock-inversion"
4670 * check "[prefix]frame-inversion"
4671 * SND_SOC_DAIFMT_INV_MASK area
4672 */
4673 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4674 bit = !!of_get_property(np, prop, NULL);
4675
4676 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4677 frame = !!of_get_property(np, prop, NULL);
4678
4679 switch ((bit << 4) + frame) {
4680 case 0x11:
4681 format |= SND_SOC_DAIFMT_IB_IF;
4682 break;
4683 case 0x10:
4684 format |= SND_SOC_DAIFMT_IB_NF;
4685 break;
4686 case 0x01:
4687 format |= SND_SOC_DAIFMT_NB_IF;
4688 break;
4689 default:
4690 /* SND_SOC_DAIFMT_NB_NF is default */
4691 break;
4692 }
4693
4694 /*
4695 * check "[prefix]bitclock-master"
4696 * check "[prefix]frame-master"
4697 * SND_SOC_DAIFMT_MASTER_MASK area
4698 */
4699 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4700 bit = !!of_get_property(np, prop, NULL);
4701 if (bit && bitclkmaster)
4702 *bitclkmaster = of_parse_phandle(np, prop, 0);
4703
4704 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4705 frame = !!of_get_property(np, prop, NULL);
4706 if (frame && framemaster)
4707 *framemaster = of_parse_phandle(np, prop, 0);
4708
4709 switch ((bit << 4) + frame) {
4710 case 0x11:
4711 format |= SND_SOC_DAIFMT_CBM_CFM;
4712 break;
4713 case 0x10:
4714 format |= SND_SOC_DAIFMT_CBM_CFS;
4715 break;
4716 case 0x01:
4717 format |= SND_SOC_DAIFMT_CBS_CFM;
4718 break;
4719 default:
4720 format |= SND_SOC_DAIFMT_CBS_CFS;
4721 break;
4722 }
4723
4724 return format;
4725 }
4726 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4727
4728 int snd_soc_of_get_dai_name(struct device_node *of_node,
4729 const char **dai_name)
4730 {
4731 struct snd_soc_component *pos;
4732 struct of_phandle_args args;
4733 int ret;
4734
4735 ret = of_parse_phandle_with_args(of_node, "sound-dai",
4736 "#sound-dai-cells", 0, &args);
4737 if (ret)
4738 return ret;
4739
4740 ret = -EPROBE_DEFER;
4741
4742 mutex_lock(&client_mutex);
4743 list_for_each_entry(pos, &component_list, list) {
4744 if (pos->dev->of_node != args.np)
4745 continue;
4746
4747 if (pos->driver->of_xlate_dai_name) {
4748 ret = pos->driver->of_xlate_dai_name(pos, &args, dai_name);
4749 } else {
4750 int id = -1;
4751
4752 switch (args.args_count) {
4753 case 0:
4754 id = 0; /* same as dai_drv[0] */
4755 break;
4756 case 1:
4757 id = args.args[0];
4758 break;
4759 default:
4760 /* not supported */
4761 break;
4762 }
4763
4764 if (id < 0 || id >= pos->num_dai) {
4765 ret = -EINVAL;
4766 continue;
4767 }
4768
4769 ret = 0;
4770
4771 *dai_name = pos->dai_drv[id].name;
4772 if (!*dai_name)
4773 *dai_name = pos->name;
4774 }
4775
4776 break;
4777 }
4778 mutex_unlock(&client_mutex);
4779
4780 of_node_put(args.np);
4781
4782 return ret;
4783 }
4784 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4785
4786 static int __init snd_soc_init(void)
4787 {
4788 #ifdef CONFIG_DEBUG_FS
4789 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4790 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4791 pr_warn("ASoC: Failed to create debugfs directory\n");
4792 snd_soc_debugfs_root = NULL;
4793 }
4794
4795 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4796 &codec_list_fops))
4797 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4798
4799 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4800 &dai_list_fops))
4801 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4802
4803 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4804 &platform_list_fops))
4805 pr_warn("ASoC: Failed to create platform list debugfs file\n");
4806 #endif
4807
4808 snd_soc_util_init();
4809
4810 return platform_driver_register(&soc_driver);
4811 }
4812 module_init(snd_soc_init);
4813
4814 static void __exit snd_soc_exit(void)
4815 {
4816 snd_soc_util_exit();
4817
4818 #ifdef CONFIG_DEBUG_FS
4819 debugfs_remove_recursive(snd_soc_debugfs_root);
4820 #endif
4821 platform_driver_unregister(&soc_driver);
4822 }
4823 module_exit(snd_soc_exit);
4824
4825 /* Module information */
4826 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4827 MODULE_DESCRIPTION("ALSA SoC Core");
4828 MODULE_LICENSE("GPL");
4829 MODULE_ALIAS("platform:soc-audio");
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