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Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[linux-2.6.git] / sound / soc / soc-core.c
blobd56bbea6e75e60158405f45b1cf280f4d0fb9ac1
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/ctype.h>
34 #include <linux/slab.h>
35 #include <linux/of.h>
36 #include <sound/ac97_codec.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
42 #include <sound/soc-dpcm.h>
43 #include <sound/initval.h>
44
45 #define CREATE_TRACE_POINTS
46 #include <trace/events/asoc.h>
47
48 #define NAME_SIZE 32
49
50 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
51
52 #ifdef CONFIG_DEBUG_FS
53 struct dentry *snd_soc_debugfs_root;
54 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 #endif
56
57 static DEFINE_MUTEX(client_mutex);
58 static LIST_HEAD(dai_list);
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 /* returns the minimum number of bytes needed to represent
73 * a particular given value */
74 static int min_bytes_needed(unsigned long val)
75 {
76 int c = 0;
77 int i;
78
79 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80 if (val & (1UL << i))
81 break;
82 c = (sizeof val * 8) - c;
83 if (!c || (c % 8))
84 c = (c + 8) / 8;
85 else
86 c /= 8;
87 return c;
88 }
89
90 /* fill buf which is 'len' bytes with a formatted
91 * string of the form 'reg: value\n' */
92 static int format_register_str(struct snd_soc_codec *codec,
93 unsigned int reg, char *buf, size_t len)
94 {
95 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96 int regsize = codec->driver->reg_word_size * 2;
97 int ret;
98 char tmpbuf[len + 1];
99 char regbuf[regsize + 1];
100
101 /* since tmpbuf is allocated on the stack, warn the callers if they
102 * try to abuse this function */
103 WARN_ON(len > 63);
104
105 /* +2 for ': ' and + 1 for '\n' */
106 if (wordsize + regsize + 2 + 1 != len)
107 return -EINVAL;
108
109 ret = snd_soc_read(codec, reg);
110 if (ret < 0) {
111 memset(regbuf, 'X', regsize);
112 regbuf[regsize] = '\0';
113 } else {
114 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
115 }
116
117 /* prepare the buffer */
118 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119 /* copy it back to the caller without the '\0' */
120 memcpy(buf, tmpbuf, len);
121
122 return 0;
123 }
124
125 /* codec register dump */
126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127 size_t count, loff_t pos)
128 {
129 int i, step = 1;
130 int wordsize, regsize;
131 int len;
132 size_t total = 0;
133 loff_t p = 0;
134
135 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136 regsize = codec->driver->reg_word_size * 2;
137
138 len = wordsize + regsize + 2 + 1;
139
140 if (!codec->driver->reg_cache_size)
141 return 0;
142
143 if (codec->driver->reg_cache_step)
144 step = codec->driver->reg_cache_step;
145
146 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147 if (!snd_soc_codec_readable_register(codec, i))
148 continue;
149 if (codec->driver->display_register) {
150 count += codec->driver->display_register(codec, buf + count,
151 PAGE_SIZE - count, i);
152 } else {
153 /* only support larger than PAGE_SIZE bytes debugfs
154 * entries for the default case */
155 if (p >= pos) {
156 if (total + len >= count - 1)
157 break;
158 format_register_str(codec, i, buf + total, len);
159 total += len;
160 }
161 p += len;
162 }
163 }
164
165 total = min(total, count - 1);
166
167 return total;
168 }
169
170 static ssize_t codec_reg_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
172 {
173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
174
175 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
176 }
177
178 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
179
180 static ssize_t pmdown_time_show(struct device *dev,
181 struct device_attribute *attr, char *buf)
182 {
183 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
184
185 return sprintf(buf, "%ld\n", rtd->pmdown_time);
186 }
187
188 static ssize_t pmdown_time_set(struct device *dev,
189 struct device_attribute *attr,
190 const char *buf, size_t count)
191 {
192 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
193 int ret;
194
195 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
196 if (ret)
197 return ret;
198
199 return count;
200 }
201
202 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
203
204 #ifdef CONFIG_DEBUG_FS
205 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
206 size_t count, loff_t *ppos)
207 {
208 ssize_t ret;
209 struct snd_soc_codec *codec = file->private_data;
210 char *buf;
211
212 if (*ppos < 0 || !count)
213 return -EINVAL;
214
215 buf = kmalloc(count, GFP_KERNEL);
216 if (!buf)
217 return -ENOMEM;
218
219 ret = soc_codec_reg_show(codec, buf, count, *ppos);
220 if (ret >= 0) {
221 if (copy_to_user(user_buf, buf, ret)) {
222 kfree(buf);
223 return -EFAULT;
224 }
225 *ppos += ret;
226 }
227
228 kfree(buf);
229 return ret;
230 }
231
232 static ssize_t codec_reg_write_file(struct file *file,
233 const char __user *user_buf, size_t count, loff_t *ppos)
234 {
235 char buf[32];
236 size_t buf_size;
237 char *start = buf;
238 unsigned long reg, value;
239 struct snd_soc_codec *codec = file->private_data;
240
241 buf_size = min(count, (sizeof(buf)-1));
242 if (copy_from_user(buf, user_buf, buf_size))
243 return -EFAULT;
244 buf[buf_size] = 0;
245
246 while (*start == ' ')
247 start++;
248 reg = simple_strtoul(start, &start, 16);
249 while (*start == ' ')
250 start++;
251 if (strict_strtoul(start, 16, &value))
252 return -EINVAL;
253
254 /* Userspace has been fiddling around behind the kernel's back */
255 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
256
257 snd_soc_write(codec, reg, value);
258 return buf_size;
259 }
260
261 static const struct file_operations codec_reg_fops = {
262 .open = simple_open,
263 .read = codec_reg_read_file,
264 .write = codec_reg_write_file,
265 .llseek = default_llseek,
266 };
267
268 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
269 {
270 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
271
272 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
273 debugfs_card_root);
274 if (!codec->debugfs_codec_root) {
275 dev_warn(codec->dev, "ASoC: Failed to create codec debugfs"
276 " directory\n");
277 return;
278 }
279
280 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
281 &codec->cache_sync);
282 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
283 &codec->cache_only);
284
285 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
286 codec->debugfs_codec_root,
287 codec, &codec_reg_fops);
288 if (!codec->debugfs_reg)
289 dev_warn(codec->dev, "ASoC: Failed to create codec register"
290 " debugfs file\n");
291
292 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
293 }
294
295 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
296 {
297 debugfs_remove_recursive(codec->debugfs_codec_root);
298 }
299
300 static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
301 {
302 struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
303
304 platform->debugfs_platform_root = debugfs_create_dir(platform->name,
305 debugfs_card_root);
306 if (!platform->debugfs_platform_root) {
307 dev_warn(platform->dev,
308 "ASoC: Failed to create platform debugfs directory\n");
309 return;
310 }
311
312 snd_soc_dapm_debugfs_init(&platform->dapm,
313 platform->debugfs_platform_root);
314 }
315
316 static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
317 {
318 debugfs_remove_recursive(platform->debugfs_platform_root);
319 }
320
321 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
322 size_t count, loff_t *ppos)
323 {
324 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
325 ssize_t len, ret = 0;
326 struct snd_soc_codec *codec;
327
328 if (!buf)
329 return -ENOMEM;
330
331 list_for_each_entry(codec, &codec_list, list) {
332 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
333 codec->name);
334 if (len >= 0)
335 ret += len;
336 if (ret > PAGE_SIZE) {
337 ret = PAGE_SIZE;
338 break;
339 }
340 }
341
342 if (ret >= 0)
343 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
344
345 kfree(buf);
346
347 return ret;
348 }
349
350 static const struct file_operations codec_list_fops = {
351 .read = codec_list_read_file,
352 .llseek = default_llseek,/* read accesses f_pos */
353 };
354
355 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
356 size_t count, loff_t *ppos)
357 {
358 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
359 ssize_t len, ret = 0;
360 struct snd_soc_dai *dai;
361
362 if (!buf)
363 return -ENOMEM;
364
365 list_for_each_entry(dai, &dai_list, list) {
366 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
367 if (len >= 0)
368 ret += len;
369 if (ret > PAGE_SIZE) {
370 ret = PAGE_SIZE;
371 break;
372 }
373 }
374
375 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
376
377 kfree(buf);
378
379 return ret;
380 }
381
382 static const struct file_operations dai_list_fops = {
383 .read = dai_list_read_file,
384 .llseek = default_llseek,/* read accesses f_pos */
385 };
386
387 static ssize_t platform_list_read_file(struct file *file,
388 char __user *user_buf,
389 size_t count, loff_t *ppos)
390 {
391 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
392 ssize_t len, ret = 0;
393 struct snd_soc_platform *platform;
394
395 if (!buf)
396 return -ENOMEM;
397
398 list_for_each_entry(platform, &platform_list, list) {
399 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
400 platform->name);
401 if (len >= 0)
402 ret += len;
403 if (ret > PAGE_SIZE) {
404 ret = PAGE_SIZE;
405 break;
406 }
407 }
408
409 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
410
411 kfree(buf);
412
413 return ret;
414 }
415
416 static const struct file_operations platform_list_fops = {
417 .read = platform_list_read_file,
418 .llseek = default_llseek,/* read accesses f_pos */
419 };
420
421 static void soc_init_card_debugfs(struct snd_soc_card *card)
422 {
423 card->debugfs_card_root = debugfs_create_dir(card->name,
424 snd_soc_debugfs_root);
425 if (!card->debugfs_card_root) {
426 dev_warn(card->dev,
427 "ASoC: Failed to create card debugfs directory\n");
428 return;
429 }
430
431 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
432 card->debugfs_card_root,
433 &card->pop_time);
434 if (!card->debugfs_pop_time)
435 dev_warn(card->dev,
436 "ASoC: Failed to create pop time debugfs file\n");
437 }
438
439 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
440 {
441 debugfs_remove_recursive(card->debugfs_card_root);
442 }
443
444 #else
445
446 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
447 {
448 }
449
450 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
451 {
452 }
453
454 static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
455 {
456 }
457
458 static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
459 {
460 }
461
462 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
463 {
464 }
465
466 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
467 {
468 }
469 #endif
470
471 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
472 const char *dai_link, int stream)
473 {
474 int i;
475
476 for (i = 0; i < card->num_links; i++) {
477 if (card->rtd[i].dai_link->no_pcm &&
478 !strcmp(card->rtd[i].dai_link->name, dai_link))
479 return card->rtd[i].pcm->streams[stream].substream;
480 }
481 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
482 return NULL;
483 }
484 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
485
486 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
487 const char *dai_link)
488 {
489 int i;
490
491 for (i = 0; i < card->num_links; i++) {
492 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
493 return &card->rtd[i];
494 }
495 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
496 return NULL;
497 }
498 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
499
500 #ifdef CONFIG_SND_SOC_AC97_BUS
501 /* unregister ac97 codec */
502 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
503 {
504 if (codec->ac97->dev.bus)
505 device_unregister(&codec->ac97->dev);
506 return 0;
507 }
508
509 /* stop no dev release warning */
510 static void soc_ac97_device_release(struct device *dev){}
511
512 /* register ac97 codec to bus */
513 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
514 {
515 int err;
516
517 codec->ac97->dev.bus = &ac97_bus_type;
518 codec->ac97->dev.parent = codec->card->dev;
519 codec->ac97->dev.release = soc_ac97_device_release;
520
521 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
522 codec->card->snd_card->number, 0, codec->name);
523 err = device_register(&codec->ac97->dev);
524 if (err < 0) {
525 dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");
526 codec->ac97->dev.bus = NULL;
527 return err;
528 }
529 return 0;
530 }
531 #endif
532
533 #ifdef CONFIG_PM_SLEEP
534 /* powers down audio subsystem for suspend */
535 int snd_soc_suspend(struct device *dev)
536 {
537 struct snd_soc_card *card = dev_get_drvdata(dev);
538 struct snd_soc_codec *codec;
539 int i;
540
541 /* If the initialization of this soc device failed, there is no codec
542 * associated with it. Just bail out in this case.
543 */
544 if (list_empty(&card->codec_dev_list))
545 return 0;
546
547 /* Due to the resume being scheduled into a workqueue we could
548 * suspend before that's finished - wait for it to complete.
549 */
550 snd_power_lock(card->snd_card);
551 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
552 snd_power_unlock(card->snd_card);
553
554 /* we're going to block userspace touching us until resume completes */
555 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
556
557 /* mute any active DACs */
558 for (i = 0; i < card->num_rtd; i++) {
559 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
560 struct snd_soc_dai_driver *drv = dai->driver;
561
562 if (card->rtd[i].dai_link->ignore_suspend)
563 continue;
564
565 if (drv->ops->digital_mute && dai->playback_active)
566 drv->ops->digital_mute(dai, 1);
567 }
568
569 /* suspend all pcms */
570 for (i = 0; i < card->num_rtd; i++) {
571 if (card->rtd[i].dai_link->ignore_suspend)
572 continue;
573
574 snd_pcm_suspend_all(card->rtd[i].pcm);
575 }
576
577 if (card->suspend_pre)
578 card->suspend_pre(card);
579
580 for (i = 0; i < card->num_rtd; i++) {
581 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
582 struct snd_soc_platform *platform = card->rtd[i].platform;
583
584 if (card->rtd[i].dai_link->ignore_suspend)
585 continue;
586
587 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
588 cpu_dai->driver->suspend(cpu_dai);
589 if (platform->driver->suspend && !platform->suspended) {
590 platform->driver->suspend(cpu_dai);
591 platform->suspended = 1;
592 }
593 }
594
595 /* close any waiting streams and save state */
596 for (i = 0; i < card->num_rtd; i++) {
597 flush_delayed_work(&card->rtd[i].delayed_work);
598 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
599 }
600
601 for (i = 0; i < card->num_rtd; i++) {
602
603 if (card->rtd[i].dai_link->ignore_suspend)
604 continue;
605
606 snd_soc_dapm_stream_event(&card->rtd[i],
607 SNDRV_PCM_STREAM_PLAYBACK,
608 SND_SOC_DAPM_STREAM_SUSPEND);
609
610 snd_soc_dapm_stream_event(&card->rtd[i],
611 SNDRV_PCM_STREAM_CAPTURE,
612 SND_SOC_DAPM_STREAM_SUSPEND);
613 }
614
615 /* Recheck all analogue paths too */
616 dapm_mark_io_dirty(&card->dapm);
617 snd_soc_dapm_sync(&card->dapm);
618
619 /* suspend all CODECs */
620 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
621 /* If there are paths active then the CODEC will be held with
622 * bias _ON and should not be suspended. */
623 if (!codec->suspended && codec->driver->suspend) {
624 switch (codec->dapm.bias_level) {
625 case SND_SOC_BIAS_STANDBY:
626 /*
627 * If the CODEC is capable of idle
628 * bias off then being in STANDBY
629 * means it's doing something,
630 * otherwise fall through.
631 */
632 if (codec->dapm.idle_bias_off) {
633 dev_dbg(codec->dev,
634 "ASoC: idle_bias_off CODEC on"
635 " over suspend\n");
636 break;
637 }
638 case SND_SOC_BIAS_OFF:
639 codec->driver->suspend(codec);
640 codec->suspended = 1;
641 codec->cache_sync = 1;
642 if (codec->using_regmap)
643 regcache_mark_dirty(codec->control_data);
644 break;
645 default:
646 dev_dbg(codec->dev, "ASoC: CODEC is on"
647 " over suspend\n");
648 break;
649 }
650 }
651 }
652
653 for (i = 0; i < card->num_rtd; i++) {
654 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
655
656 if (card->rtd[i].dai_link->ignore_suspend)
657 continue;
658
659 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
660 cpu_dai->driver->suspend(cpu_dai);
661 }
662
663 if (card->suspend_post)
664 card->suspend_post(card);
665
666 return 0;
667 }
668 EXPORT_SYMBOL_GPL(snd_soc_suspend);
669
670 /* deferred resume work, so resume can complete before we finished
671 * setting our codec back up, which can be very slow on I2C
672 */
673 static void soc_resume_deferred(struct work_struct *work)
674 {
675 struct snd_soc_card *card =
676 container_of(work, struct snd_soc_card, deferred_resume_work);
677 struct snd_soc_codec *codec;
678 int i;
679
680 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
681 * so userspace apps are blocked from touching us
682 */
683
684 dev_dbg(card->dev, "ASoC: starting resume work\n");
685
686 /* Bring us up into D2 so that DAPM starts enabling things */
687 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
688
689 if (card->resume_pre)
690 card->resume_pre(card);
691
692 /* resume AC97 DAIs */
693 for (i = 0; i < card->num_rtd; i++) {
694 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
695
696 if (card->rtd[i].dai_link->ignore_suspend)
697 continue;
698
699 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
700 cpu_dai->driver->resume(cpu_dai);
701 }
702
703 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
704 /* If the CODEC was idle over suspend then it will have been
705 * left with bias OFF or STANDBY and suspended so we must now
706 * resume. Otherwise the suspend was suppressed.
707 */
708 if (codec->driver->resume && codec->suspended) {
709 switch (codec->dapm.bias_level) {
710 case SND_SOC_BIAS_STANDBY:
711 case SND_SOC_BIAS_OFF:
712 codec->driver->resume(codec);
713 codec->suspended = 0;
714 break;
715 default:
716 dev_dbg(codec->dev, "ASoC: CODEC was on over"
717 " suspend\n");
718 break;
719 }
720 }
721 }
722
723 for (i = 0; i < card->num_rtd; i++) {
724
725 if (card->rtd[i].dai_link->ignore_suspend)
726 continue;
727
728 snd_soc_dapm_stream_event(&card->rtd[i],
729 SNDRV_PCM_STREAM_PLAYBACK,
730 SND_SOC_DAPM_STREAM_RESUME);
731
732 snd_soc_dapm_stream_event(&card->rtd[i],
733 SNDRV_PCM_STREAM_CAPTURE,
734 SND_SOC_DAPM_STREAM_RESUME);
735 }
736
737 /* unmute any active DACs */
738 for (i = 0; i < card->num_rtd; i++) {
739 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
740 struct snd_soc_dai_driver *drv = dai->driver;
741
742 if (card->rtd[i].dai_link->ignore_suspend)
743 continue;
744
745 if (drv->ops->digital_mute && dai->playback_active)
746 drv->ops->digital_mute(dai, 0);
747 }
748
749 for (i = 0; i < card->num_rtd; i++) {
750 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
751 struct snd_soc_platform *platform = card->rtd[i].platform;
752
753 if (card->rtd[i].dai_link->ignore_suspend)
754 continue;
755
756 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
757 cpu_dai->driver->resume(cpu_dai);
758 if (platform->driver->resume && platform->suspended) {
759 platform->driver->resume(cpu_dai);
760 platform->suspended = 0;
761 }
762 }
763
764 if (card->resume_post)
765 card->resume_post(card);
766
767 dev_dbg(card->dev, "ASoC: resume work completed\n");
768
769 /* userspace can access us now we are back as we were before */
770 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
771
772 /* Recheck all analogue paths too */
773 dapm_mark_io_dirty(&card->dapm);
774 snd_soc_dapm_sync(&card->dapm);
775 }
776
777 /* powers up audio subsystem after a suspend */
778 int snd_soc_resume(struct device *dev)
779 {
780 struct snd_soc_card *card = dev_get_drvdata(dev);
781 int i, ac97_control = 0;
782
783 /* If the initialization of this soc device failed, there is no codec
784 * associated with it. Just bail out in this case.
785 */
786 if (list_empty(&card->codec_dev_list))
787 return 0;
788
789 /* AC97 devices might have other drivers hanging off them so
790 * need to resume immediately. Other drivers don't have that
791 * problem and may take a substantial amount of time to resume
792 * due to I/O costs and anti-pop so handle them out of line.
793 */
794 for (i = 0; i < card->num_rtd; i++) {
795 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
796 ac97_control |= cpu_dai->driver->ac97_control;
797 }
798 if (ac97_control) {
799 dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
800 soc_resume_deferred(&card->deferred_resume_work);
801 } else {
802 dev_dbg(dev, "ASoC: Scheduling resume work\n");
803 if (!schedule_work(&card->deferred_resume_work))
804 dev_err(dev, "ASoC: resume work item may be lost\n");
805 }
806
807 return 0;
808 }
809 EXPORT_SYMBOL_GPL(snd_soc_resume);
810 #else
811 #define snd_soc_suspend NULL
812 #define snd_soc_resume NULL
813 #endif
814
815 static const struct snd_soc_dai_ops null_dai_ops = {
816 };
817
818 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
819 {
820 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
821 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
822 struct snd_soc_codec *codec;
823 struct snd_soc_platform *platform;
824 struct snd_soc_dai *codec_dai, *cpu_dai;
825 const char *platform_name;
826
827 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
828
829 /* Find CPU DAI from registered DAIs*/
830 list_for_each_entry(cpu_dai, &dai_list, list) {
831 if (dai_link->cpu_of_node &&
832 (cpu_dai->dev->of_node != dai_link->cpu_of_node))
833 continue;
834 if (dai_link->cpu_name &&
835 strcmp(dev_name(cpu_dai->dev), dai_link->cpu_name))
836 continue;
837 if (dai_link->cpu_dai_name &&
838 strcmp(cpu_dai->name, dai_link->cpu_dai_name))
839 continue;
840
841 rtd->cpu_dai = cpu_dai;
842 }
843
844 if (!rtd->cpu_dai) {
845 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
846 dai_link->cpu_dai_name);
847 return -EPROBE_DEFER;
848 }
849
850 /* Find CODEC from registered CODECs */
851 list_for_each_entry(codec, &codec_list, list) {
852 if (dai_link->codec_of_node) {
853 if (codec->dev->of_node != dai_link->codec_of_node)
854 continue;
855 } else {
856 if (strcmp(codec->name, dai_link->codec_name))
857 continue;
858 }
859
860 rtd->codec = codec;
861
862 /*
863 * CODEC found, so find CODEC DAI from registered DAIs from
864 * this CODEC
865 */
866 list_for_each_entry(codec_dai, &dai_list, list) {
867 if (codec->dev == codec_dai->dev &&
868 !strcmp(codec_dai->name,
869 dai_link->codec_dai_name)) {
870
871 rtd->codec_dai = codec_dai;
872 }
873 }
874
875 if (!rtd->codec_dai) {
876 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
877 dai_link->codec_dai_name);
878 return -EPROBE_DEFER;
879 }
880 }
881
882 if (!rtd->codec) {
883 dev_err(card->dev, "ASoC: CODEC %s not registered\n",
884 dai_link->codec_name);
885 return -EPROBE_DEFER;
886 }
887
888 /* if there's no platform we match on the empty platform */
889 platform_name = dai_link->platform_name;
890 if (!platform_name && !dai_link->platform_of_node)
891 platform_name = "snd-soc-dummy";
892
893 /* find one from the set of registered platforms */
894 list_for_each_entry(platform, &platform_list, list) {
895 if (dai_link->platform_of_node) {
896 if (platform->dev->of_node !=
897 dai_link->platform_of_node)
898 continue;
899 } else {
900 if (strcmp(platform->name, platform_name))
901 continue;
902 }
903
904 rtd->platform = platform;
905 }
906 if (!rtd->platform) {
907 dev_err(card->dev, "ASoC: platform %s not registered\n",
908 dai_link->platform_name);
909 return -EPROBE_DEFER;
910 }
911
912 card->num_rtd++;
913
914 return 0;
915 }
916
917 static int soc_remove_platform(struct snd_soc_platform *platform)
918 {
919 int ret;
920
921 if (platform->driver->remove) {
922 ret = platform->driver->remove(platform);
923 if (ret < 0)
924 dev_err(platform->dev, "ASoC: failed to remove %d\n",
925 ret);
926 }
927
928 /* Make sure all DAPM widgets are freed */
929 snd_soc_dapm_free(&platform->dapm);
930
931 soc_cleanup_platform_debugfs(platform);
932 platform->probed = 0;
933 list_del(&platform->card_list);
934 module_put(platform->dev->driver->owner);
935
936 return 0;
937 }
938
939 static void soc_remove_codec(struct snd_soc_codec *codec)
940 {
941 int err;
942
943 if (codec->driver->remove) {
944 err = codec->driver->remove(codec);
945 if (err < 0)
946 dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
947 }
948
949 /* Make sure all DAPM widgets are freed */
950 snd_soc_dapm_free(&codec->dapm);
951
952 soc_cleanup_codec_debugfs(codec);
953 codec->probed = 0;
954 list_del(&codec->card_list);
955 module_put(codec->dev->driver->owner);
956 }
957
958 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
959 {
960 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
961 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
962 int err;
963
964 /* unregister the rtd device */
965 if (rtd->dev_registered) {
966 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
967 device_remove_file(rtd->dev, &dev_attr_codec_reg);
968 device_unregister(rtd->dev);
969 rtd->dev_registered = 0;
970 }
971
972 /* remove the CODEC DAI */
973 if (codec_dai && codec_dai->probed &&
974 codec_dai->driver->remove_order == order) {
975 if (codec_dai->driver->remove) {
976 err = codec_dai->driver->remove(codec_dai);
977 if (err < 0)
978 dev_err(codec_dai->dev,
979 "ASoC: failed to remove %s: %d\n",
980 codec_dai->name, err);
981 }
982 codec_dai->probed = 0;
983 list_del(&codec_dai->card_list);
984 }
985
986 /* remove the cpu_dai */
987 if (cpu_dai && cpu_dai->probed &&
988 cpu_dai->driver->remove_order == order) {
989 if (cpu_dai->driver->remove) {
990 err = cpu_dai->driver->remove(cpu_dai);
991 if (err < 0)
992 dev_err(cpu_dai->dev,
993 "ASoC: failed to remove %s: %d\n",
994 cpu_dai->name, err);
995 }
996 cpu_dai->probed = 0;
997 list_del(&cpu_dai->card_list);
998
999 if (!cpu_dai->codec) {
1000 snd_soc_dapm_free(&cpu_dai->dapm);
1001 module_put(cpu_dai->dev->driver->owner);
1002 }
1003 }
1004 }
1005
1006 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1007 int order)
1008 {
1009 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1010 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1011 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1012 struct snd_soc_platform *platform = rtd->platform;
1013 struct snd_soc_codec *codec;
1014
1015 /* remove the platform */
1016 if (platform && platform->probed &&
1017 platform->driver->remove_order == order) {
1018 soc_remove_platform(platform);
1019 }
1020
1021 /* remove the CODEC-side CODEC */
1022 if (codec_dai) {
1023 codec = codec_dai->codec;
1024 if (codec && codec->probed &&
1025 codec->driver->remove_order == order)
1026 soc_remove_codec(codec);
1027 }
1028
1029 /* remove any CPU-side CODEC */
1030 if (cpu_dai) {
1031 codec = cpu_dai->codec;
1032 if (codec && codec->probed &&
1033 codec->driver->remove_order == order)
1034 soc_remove_codec(codec);
1035 }
1036 }
1037
1038 static void soc_remove_dai_links(struct snd_soc_card *card)
1039 {
1040 int dai, order;
1041
1042 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1043 order++) {
1044 for (dai = 0; dai < card->num_rtd; dai++)
1045 soc_remove_link_dais(card, dai, order);
1046 }
1047
1048 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1049 order++) {
1050 for (dai = 0; dai < card->num_rtd; dai++)
1051 soc_remove_link_components(card, dai, order);
1052 }
1053
1054 card->num_rtd = 0;
1055 }
1056
1057 static void soc_set_name_prefix(struct snd_soc_card *card,
1058 struct snd_soc_codec *codec)
1059 {
1060 int i;
1061
1062 if (card->codec_conf == NULL)
1063 return;
1064
1065 for (i = 0; i < card->num_configs; i++) {
1066 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1067 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1068 codec->name_prefix = map->name_prefix;
1069 break;
1070 }
1071 }
1072 }
1073
1074 static int soc_probe_codec(struct snd_soc_card *card,
1075 struct snd_soc_codec *codec)
1076 {
1077 int ret = 0;
1078 const struct snd_soc_codec_driver *driver = codec->driver;
1079 struct snd_soc_dai *dai;
1080
1081 codec->card = card;
1082 codec->dapm.card = card;
1083 soc_set_name_prefix(card, codec);
1084
1085 if (!try_module_get(codec->dev->driver->owner))
1086 return -ENODEV;
1087
1088 soc_init_codec_debugfs(codec);
1089
1090 if (driver->dapm_widgets)
1091 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1092 driver->num_dapm_widgets);
1093
1094 /* Create DAPM widgets for each DAI stream */
1095 list_for_each_entry(dai, &dai_list, list) {
1096 if (dai->dev != codec->dev)
1097 continue;
1098
1099 snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1100 }
1101
1102 codec->dapm.idle_bias_off = driver->idle_bias_off;
1103
1104 if (driver->probe) {
1105 ret = driver->probe(codec);
1106 if (ret < 0) {
1107 dev_err(codec->dev,
1108 "ASoC: failed to probe CODEC %d\n", ret);
1109 goto err_probe;
1110 }
1111 WARN(codec->dapm.idle_bias_off &&
1112 codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1113 "codec %s can not start from non-off bias"
1114 " with idle_bias_off==1\n", codec->name);
1115 }
1116
1117 /* If the driver didn't set I/O up try regmap */
1118 if (!codec->write && dev_get_regmap(codec->dev, NULL))
1119 snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
1120
1121 if (driver->controls)
1122 snd_soc_add_codec_controls(codec, driver->controls,
1123 driver->num_controls);
1124 if (driver->dapm_routes)
1125 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1126 driver->num_dapm_routes);
1127
1128 /* mark codec as probed and add to card codec list */
1129 codec->probed = 1;
1130 list_add(&codec->card_list, &card->codec_dev_list);
1131 list_add(&codec->dapm.list, &card->dapm_list);
1132
1133 return 0;
1134
1135 err_probe:
1136 soc_cleanup_codec_debugfs(codec);
1137 module_put(codec->dev->driver->owner);
1138
1139 return ret;
1140 }
1141
1142 static int soc_probe_platform(struct snd_soc_card *card,
1143 struct snd_soc_platform *platform)
1144 {
1145 int ret = 0;
1146 const struct snd_soc_platform_driver *driver = platform->driver;
1147 struct snd_soc_dai *dai;
1148
1149 platform->card = card;
1150 platform->dapm.card = card;
1151
1152 if (!try_module_get(platform->dev->driver->owner))
1153 return -ENODEV;
1154
1155 soc_init_platform_debugfs(platform);
1156
1157 if (driver->dapm_widgets)
1158 snd_soc_dapm_new_controls(&platform->dapm,
1159 driver->dapm_widgets, driver->num_dapm_widgets);
1160
1161 /* Create DAPM widgets for each DAI stream */
1162 list_for_each_entry(dai, &dai_list, list) {
1163 if (dai->dev != platform->dev)
1164 continue;
1165
1166 snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1167 }
1168
1169 platform->dapm.idle_bias_off = 1;
1170
1171 if (driver->probe) {
1172 ret = driver->probe(platform);
1173 if (ret < 0) {
1174 dev_err(platform->dev,
1175 "ASoC: failed to probe platform %d\n", ret);
1176 goto err_probe;
1177 }
1178 }
1179
1180 if (driver->controls)
1181 snd_soc_add_platform_controls(platform, driver->controls,
1182 driver->num_controls);
1183 if (driver->dapm_routes)
1184 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1185 driver->num_dapm_routes);
1186
1187 /* mark platform as probed and add to card platform list */
1188 platform->probed = 1;
1189 list_add(&platform->card_list, &card->platform_dev_list);
1190 list_add(&platform->dapm.list, &card->dapm_list);
1191
1192 return 0;
1193
1194 err_probe:
1195 soc_cleanup_platform_debugfs(platform);
1196 module_put(platform->dev->driver->owner);
1197
1198 return ret;
1199 }
1200
1201 static void rtd_release(struct device *dev)
1202 {
1203 kfree(dev);
1204 }
1205
1206 static int soc_post_component_init(struct snd_soc_card *card,
1207 struct snd_soc_codec *codec,
1208 int num, int dailess)
1209 {
1210 struct snd_soc_dai_link *dai_link = NULL;
1211 struct snd_soc_aux_dev *aux_dev = NULL;
1212 struct snd_soc_pcm_runtime *rtd;
1213 const char *temp, *name;
1214 int ret = 0;
1215
1216 if (!dailess) {
1217 dai_link = &card->dai_link[num];
1218 rtd = &card->rtd[num];
1219 name = dai_link->name;
1220 } else {
1221 aux_dev = &card->aux_dev[num];
1222 rtd = &card->rtd_aux[num];
1223 name = aux_dev->name;
1224 }
1225 rtd->card = card;
1226
1227 /* Make sure all DAPM widgets are instantiated */
1228 snd_soc_dapm_new_widgets(&codec->dapm);
1229
1230 /* machine controls, routes and widgets are not prefixed */
1231 temp = codec->name_prefix;
1232 codec->name_prefix = NULL;
1233
1234 /* do machine specific initialization */
1235 if (!dailess && dai_link->init)
1236 ret = dai_link->init(rtd);
1237 else if (dailess && aux_dev->init)
1238 ret = aux_dev->init(&codec->dapm);
1239 if (ret < 0) {
1240 dev_err(card->dev, "ASoC: failed to init %s: %d\n", name, ret);
1241 return ret;
1242 }
1243 codec->name_prefix = temp;
1244
1245 /* register the rtd device */
1246 rtd->codec = codec;
1247
1248 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1249 if (!rtd->dev)
1250 return -ENOMEM;
1251 device_initialize(rtd->dev);
1252 rtd->dev->parent = card->dev;
1253 rtd->dev->release = rtd_release;
1254 rtd->dev->init_name = name;
1255 dev_set_drvdata(rtd->dev, rtd);
1256 mutex_init(&rtd->pcm_mutex);
1257 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1258 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1259 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1260 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1261 ret = device_add(rtd->dev);
1262 if (ret < 0) {
1263 /* calling put_device() here to free the rtd->dev */
1264 put_device(rtd->dev);
1265 dev_err(card->dev,
1266 "ASoC: failed to register runtime device: %d\n", ret);
1267 return ret;
1268 }
1269 rtd->dev_registered = 1;
1270
1271 /* add DAPM sysfs entries for this codec */
1272 ret = snd_soc_dapm_sys_add(rtd->dev);
1273 if (ret < 0)
1274 dev_err(codec->dev,
1275 "ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1276
1277 /* add codec sysfs entries */
1278 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1279 if (ret < 0)
1280 dev_err(codec->dev,
1281 "ASoC: failed to add codec sysfs files: %d\n", ret);
1282
1283 #ifdef CONFIG_DEBUG_FS
1284 /* add DPCM sysfs entries */
1285 if (!dailess && !dai_link->dynamic)
1286 goto out;
1287
1288 ret = soc_dpcm_debugfs_add(rtd);
1289 if (ret < 0)
1290 dev_err(rtd->dev, "ASoC: failed to add dpcm sysfs entries: %d\n", ret);
1291
1292 out:
1293 #endif
1294 return 0;
1295 }
1296
1297 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1298 int order)
1299 {
1300 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1301 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1302 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1303 struct snd_soc_platform *platform = rtd->platform;
1304 int ret;
1305
1306 /* probe the CPU-side component, if it is a CODEC */
1307 if (cpu_dai->codec &&
1308 !cpu_dai->codec->probed &&
1309 cpu_dai->codec->driver->probe_order == order) {
1310 ret = soc_probe_codec(card, cpu_dai->codec);
1311 if (ret < 0)
1312 return ret;
1313 }
1314
1315 /* probe the CODEC-side component */
1316 if (!codec_dai->codec->probed &&
1317 codec_dai->codec->driver->probe_order == order) {
1318 ret = soc_probe_codec(card, codec_dai->codec);
1319 if (ret < 0)
1320 return ret;
1321 }
1322
1323 /* probe the platform */
1324 if (!platform->probed &&
1325 platform->driver->probe_order == order) {
1326 ret = soc_probe_platform(card, platform);
1327 if (ret < 0)
1328 return ret;
1329 }
1330
1331 return 0;
1332 }
1333
1334 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1335 {
1336 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1337 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1338 struct snd_soc_codec *codec = rtd->codec;
1339 struct snd_soc_platform *platform = rtd->platform;
1340 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1341 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1342 struct snd_soc_dapm_widget *play_w, *capture_w;
1343 int ret;
1344
1345 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1346 card->name, num, order);
1347
1348 /* config components */
1349 cpu_dai->platform = platform;
1350 codec_dai->card = card;
1351 cpu_dai->card = card;
1352
1353 /* set default power off timeout */
1354 rtd->pmdown_time = pmdown_time;
1355
1356 /* probe the cpu_dai */
1357 if (!cpu_dai->probed &&
1358 cpu_dai->driver->probe_order == order) {
1359 if (!cpu_dai->codec) {
1360 cpu_dai->dapm.card = card;
1361 if (!try_module_get(cpu_dai->dev->driver->owner))
1362 return -ENODEV;
1363
1364 list_add(&cpu_dai->dapm.list, &card->dapm_list);
1365 snd_soc_dapm_new_dai_widgets(&cpu_dai->dapm, cpu_dai);
1366 }
1367
1368 if (cpu_dai->driver->probe) {
1369 ret = cpu_dai->driver->probe(cpu_dai);
1370 if (ret < 0) {
1371 dev_err(cpu_dai->dev,
1372 "ASoC: failed to probe CPU DAI %s: %d\n",
1373 cpu_dai->name, ret);
1374 module_put(cpu_dai->dev->driver->owner);
1375 return ret;
1376 }
1377 }
1378 cpu_dai->probed = 1;
1379 /* mark cpu_dai as probed and add to card dai list */
1380 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1381 }
1382
1383 /* probe the CODEC DAI */
1384 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1385 if (codec_dai->driver->probe) {
1386 ret = codec_dai->driver->probe(codec_dai);
1387 if (ret < 0) {
1388 dev_err(codec_dai->dev,
1389 "ASoC: failed to probe CODEC DAI %s: %d\n",
1390 codec_dai->name, ret);
1391 return ret;
1392 }
1393 }
1394
1395 /* mark codec_dai as probed and add to card dai list */
1396 codec_dai->probed = 1;
1397 list_add(&codec_dai->card_list, &card->dai_dev_list);
1398 }
1399
1400 /* complete DAI probe during last probe */
1401 if (order != SND_SOC_COMP_ORDER_LAST)
1402 return 0;
1403
1404 ret = soc_post_component_init(card, codec, num, 0);
1405 if (ret)
1406 return ret;
1407
1408 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1409 if (ret < 0)
1410 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1411 ret);
1412
1413 if (cpu_dai->driver->compress_dai) {
1414 /*create compress_device"*/
1415 ret = soc_new_compress(rtd, num);
1416 if (ret < 0) {
1417 dev_err(card->dev, "ASoC: can't create compress %s\n",
1418 dai_link->stream_name);
1419 return ret;
1420 }
1421 } else {
1422
1423 if (!dai_link->params) {
1424 /* create the pcm */
1425 ret = soc_new_pcm(rtd, num);
1426 if (ret < 0) {
1427 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1428 dai_link->stream_name, ret);
1429 return ret;
1430 }
1431 } else {
1432 /* link the DAI widgets */
1433 play_w = codec_dai->playback_widget;
1434 capture_w = cpu_dai->capture_widget;
1435 if (play_w && capture_w) {
1436 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1437 capture_w, play_w);
1438 if (ret != 0) {
1439 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1440 play_w->name, capture_w->name, ret);
1441 return ret;
1442 }
1443 }
1444
1445 play_w = cpu_dai->playback_widget;
1446 capture_w = codec_dai->capture_widget;
1447 if (play_w && capture_w) {
1448 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1449 capture_w, play_w);
1450 if (ret != 0) {
1451 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1452 play_w->name, capture_w->name, ret);
1453 return ret;
1454 }
1455 }
1456 }
1457 }
1458
1459 /* add platform data for AC97 devices */
1460 if (rtd->codec_dai->driver->ac97_control)
1461 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1462
1463 return 0;
1464 }
1465
1466 #ifdef CONFIG_SND_SOC_AC97_BUS
1467 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1468 {
1469 int ret;
1470
1471 /* Only instantiate AC97 if not already done by the adaptor
1472 * for the generic AC97 subsystem.
1473 */
1474 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1475 /*
1476 * It is possible that the AC97 device is already registered to
1477 * the device subsystem. This happens when the device is created
1478 * via snd_ac97_mixer(). Currently only SoC codec that does so
1479 * is the generic AC97 glue but others migh emerge.
1480 *
1481 * In those cases we don't try to register the device again.
1482 */
1483 if (!rtd->codec->ac97_created)
1484 return 0;
1485
1486 ret = soc_ac97_dev_register(rtd->codec);
1487 if (ret < 0) {
1488 dev_err(rtd->codec->dev,
1489 "ASoC: AC97 device register failed: %d\n", ret);
1490 return ret;
1491 }
1492
1493 rtd->codec->ac97_registered = 1;
1494 }
1495 return 0;
1496 }
1497
1498 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1499 {
1500 if (codec->ac97_registered) {
1501 soc_ac97_dev_unregister(codec);
1502 codec->ac97_registered = 0;
1503 }
1504 }
1505 #endif
1506
1507 static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1508 {
1509 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1510 struct snd_soc_codec *codec;
1511
1512 /* find CODEC from registered CODECs*/
1513 list_for_each_entry(codec, &codec_list, list) {
1514 if (!strcmp(codec->name, aux_dev->codec_name))
1515 return 0;
1516 }
1517
1518 dev_err(card->dev, "ASoC: %s not registered\n", aux_dev->codec_name);
1519
1520 return -EPROBE_DEFER;
1521 }
1522
1523 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1524 {
1525 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1526 struct snd_soc_codec *codec;
1527 int ret = -ENODEV;
1528
1529 /* find CODEC from registered CODECs*/
1530 list_for_each_entry(codec, &codec_list, list) {
1531 if (!strcmp(codec->name, aux_dev->codec_name)) {
1532 if (codec->probed) {
1533 dev_err(codec->dev,
1534 "ASoC: codec already probed");
1535 ret = -EBUSY;
1536 goto out;
1537 }
1538 goto found;
1539 }
1540 }
1541 /* codec not found */
1542 dev_err(card->dev, "ASoC: codec %s not found", aux_dev->codec_name);
1543 return -EPROBE_DEFER;
1544
1545 found:
1546 ret = soc_probe_codec(card, codec);
1547 if (ret < 0)
1548 return ret;
1549
1550 ret = soc_post_component_init(card, codec, num, 1);
1551
1552 out:
1553 return ret;
1554 }
1555
1556 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1557 {
1558 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1559 struct snd_soc_codec *codec = rtd->codec;
1560
1561 /* unregister the rtd device */
1562 if (rtd->dev_registered) {
1563 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1564 device_unregister(rtd->dev);
1565 rtd->dev_registered = 0;
1566 }
1567
1568 if (codec && codec->probed)
1569 soc_remove_codec(codec);
1570 }
1571
1572 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1573 enum snd_soc_compress_type compress_type)
1574 {
1575 int ret;
1576
1577 if (codec->cache_init)
1578 return 0;
1579
1580 /* override the compress_type if necessary */
1581 if (compress_type && codec->compress_type != compress_type)
1582 codec->compress_type = compress_type;
1583 ret = snd_soc_cache_init(codec);
1584 if (ret < 0) {
1585 dev_err(codec->dev, "ASoC: Failed to set cache compression"
1586 " type: %d\n", ret);
1587 return ret;
1588 }
1589 codec->cache_init = 1;
1590 return 0;
1591 }
1592
1593 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1594 {
1595 struct snd_soc_codec *codec;
1596 struct snd_soc_codec_conf *codec_conf;
1597 enum snd_soc_compress_type compress_type;
1598 struct snd_soc_dai_link *dai_link;
1599 int ret, i, order, dai_fmt;
1600
1601 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1602
1603 /* bind DAIs */
1604 for (i = 0; i < card->num_links; i++) {
1605 ret = soc_bind_dai_link(card, i);
1606 if (ret != 0)
1607 goto base_error;
1608 }
1609
1610 /* check aux_devs too */
1611 for (i = 0; i < card->num_aux_devs; i++) {
1612 ret = soc_check_aux_dev(card, i);
1613 if (ret != 0)
1614 goto base_error;
1615 }
1616
1617 /* initialize the register cache for each available codec */
1618 list_for_each_entry(codec, &codec_list, list) {
1619 if (codec->cache_init)
1620 continue;
1621 /* by default we don't override the compress_type */
1622 compress_type = 0;
1623 /* check to see if we need to override the compress_type */
1624 for (i = 0; i < card->num_configs; ++i) {
1625 codec_conf = &card->codec_conf[i];
1626 if (!strcmp(codec->name, codec_conf->dev_name)) {
1627 compress_type = codec_conf->compress_type;
1628 if (compress_type && compress_type
1629 != codec->compress_type)
1630 break;
1631 }
1632 }
1633 ret = snd_soc_init_codec_cache(codec, compress_type);
1634 if (ret < 0)
1635 goto base_error;
1636 }
1637
1638 /* card bind complete so register a sound card */
1639 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1640 card->owner, 0, &card->snd_card);
1641 if (ret < 0) {
1642 dev_err(card->dev, "ASoC: can't create sound card for"
1643 " card %s: %d\n", card->name, ret);
1644 goto base_error;
1645 }
1646 card->snd_card->dev = card->dev;
1647
1648 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1649 card->dapm.dev = card->dev;
1650 card->dapm.card = card;
1651 list_add(&card->dapm.list, &card->dapm_list);
1652
1653 #ifdef CONFIG_DEBUG_FS
1654 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1655 #endif
1656
1657 #ifdef CONFIG_PM_SLEEP
1658 /* deferred resume work */
1659 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1660 #endif
1661
1662 if (card->dapm_widgets)
1663 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1664 card->num_dapm_widgets);
1665
1666 /* initialise the sound card only once */
1667 if (card->probe) {
1668 ret = card->probe(card);
1669 if (ret < 0)
1670 goto card_probe_error;
1671 }
1672
1673 /* probe all components used by DAI links on this card */
1674 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1675 order++) {
1676 for (i = 0; i < card->num_links; i++) {
1677 ret = soc_probe_link_components(card, i, order);
1678 if (ret < 0) {
1679 dev_err(card->dev,
1680 "ASoC: failed to instantiate card %d\n",
1681 ret);
1682 goto probe_dai_err;
1683 }
1684 }
1685 }
1686
1687 /* probe all DAI links on this card */
1688 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1689 order++) {
1690 for (i = 0; i < card->num_links; i++) {
1691 ret = soc_probe_link_dais(card, i, order);
1692 if (ret < 0) {
1693 dev_err(card->dev,
1694 "ASoC: failed to instantiate card %d\n",
1695 ret);
1696 goto probe_dai_err;
1697 }
1698 }
1699 }
1700
1701 for (i = 0; i < card->num_aux_devs; i++) {
1702 ret = soc_probe_aux_dev(card, i);
1703 if (ret < 0) {
1704 dev_err(card->dev,
1705 "ASoC: failed to add auxiliary devices %d\n",
1706 ret);
1707 goto probe_aux_dev_err;
1708 }
1709 }
1710
1711 snd_soc_dapm_link_dai_widgets(card);
1712
1713 if (card->controls)
1714 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1715
1716 if (card->dapm_routes)
1717 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1718 card->num_dapm_routes);
1719
1720 snd_soc_dapm_new_widgets(&card->dapm);
1721
1722 for (i = 0; i < card->num_links; i++) {
1723 dai_link = &card->dai_link[i];
1724 dai_fmt = dai_link->dai_fmt;
1725
1726 if (dai_fmt) {
1727 ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1728 dai_fmt);
1729 if (ret != 0 && ret != -ENOTSUPP)
1730 dev_warn(card->rtd[i].codec_dai->dev,
1731 "ASoC: Failed to set DAI format: %d\n",
1732 ret);
1733 }
1734
1735 /* If this is a regular CPU link there will be a platform */
1736 if (dai_fmt &&
1737 (dai_link->platform_name || dai_link->platform_of_node)) {
1738 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1739 dai_fmt);
1740 if (ret != 0 && ret != -ENOTSUPP)
1741 dev_warn(card->rtd[i].cpu_dai->dev,
1742 "ASoC: Failed to set DAI format: %d\n",
1743 ret);
1744 } else if (dai_fmt) {
1745 /* Flip the polarity for the "CPU" end */
1746 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1747 switch (dai_link->dai_fmt &
1748 SND_SOC_DAIFMT_MASTER_MASK) {
1749 case SND_SOC_DAIFMT_CBM_CFM:
1750 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1751 break;
1752 case SND_SOC_DAIFMT_CBM_CFS:
1753 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1754 break;
1755 case SND_SOC_DAIFMT_CBS_CFM:
1756 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1757 break;
1758 case SND_SOC_DAIFMT_CBS_CFS:
1759 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1760 break;
1761 }
1762
1763 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1764 dai_fmt);
1765 if (ret != 0 && ret != -ENOTSUPP)
1766 dev_warn(card->rtd[i].cpu_dai->dev,
1767 "ASoC: Failed to set DAI format: %d\n",
1768 ret);
1769 }
1770 }
1771
1772 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1773 "%s", card->name);
1774 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1775 "%s", card->long_name ? card->long_name : card->name);
1776 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1777 "%s", card->driver_name ? card->driver_name : card->name);
1778 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1779 switch (card->snd_card->driver[i]) {
1780 case '_':
1781 case '-':
1782 case '\0':
1783 break;
1784 default:
1785 if (!isalnum(card->snd_card->driver[i]))
1786 card->snd_card->driver[i] = '_';
1787 break;
1788 }
1789 }
1790
1791 if (card->late_probe) {
1792 ret = card->late_probe(card);
1793 if (ret < 0) {
1794 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1795 card->name, ret);
1796 goto probe_aux_dev_err;
1797 }
1798 }
1799
1800 snd_soc_dapm_new_widgets(&card->dapm);
1801
1802 if (card->fully_routed)
1803 list_for_each_entry(codec, &card->codec_dev_list, card_list)
1804 snd_soc_dapm_auto_nc_codec_pins(codec);
1805
1806 ret = snd_card_register(card->snd_card);
1807 if (ret < 0) {
1808 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1809 ret);
1810 goto probe_aux_dev_err;
1811 }
1812
1813 #ifdef CONFIG_SND_SOC_AC97_BUS
1814 /* register any AC97 codecs */
1815 for (i = 0; i < card->num_rtd; i++) {
1816 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1817 if (ret < 0) {
1818 dev_err(card->dev, "ASoC: failed to register AC97:"
1819 " %d\n", ret);
1820 while (--i >= 0)
1821 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1822 goto probe_aux_dev_err;
1823 }
1824 }
1825 #endif
1826
1827 card->instantiated = 1;
1828 snd_soc_dapm_sync(&card->dapm);
1829 mutex_unlock(&card->mutex);
1830
1831 return 0;
1832
1833 probe_aux_dev_err:
1834 for (i = 0; i < card->num_aux_devs; i++)
1835 soc_remove_aux_dev(card, i);
1836
1837 probe_dai_err:
1838 soc_remove_dai_links(card);
1839
1840 card_probe_error:
1841 if (card->remove)
1842 card->remove(card);
1843
1844 snd_card_free(card->snd_card);
1845
1846 base_error:
1847 mutex_unlock(&card->mutex);
1848
1849 return ret;
1850 }
1851
1852 /* probes a new socdev */
1853 static int soc_probe(struct platform_device *pdev)
1854 {
1855 struct snd_soc_card *card = platform_get_drvdata(pdev);
1856
1857 /*
1858 * no card, so machine driver should be registering card
1859 * we should not be here in that case so ret error
1860 */
1861 if (!card)
1862 return -EINVAL;
1863
1864 dev_warn(&pdev->dev,
1865 "ASoC: machine %s should use snd_soc_register_card()\n",
1866 card->name);
1867
1868 /* Bodge while we unpick instantiation */
1869 card->dev = &pdev->dev;
1870
1871 return snd_soc_register_card(card);
1872 }
1873
1874 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1875 {
1876 int i;
1877
1878 /* make sure any delayed work runs */
1879 for (i = 0; i < card->num_rtd; i++) {
1880 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1881 flush_delayed_work(&rtd->delayed_work);
1882 }
1883
1884 /* remove auxiliary devices */
1885 for (i = 0; i < card->num_aux_devs; i++)
1886 soc_remove_aux_dev(card, i);
1887
1888 /* remove and free each DAI */
1889 soc_remove_dai_links(card);
1890
1891 soc_cleanup_card_debugfs(card);
1892
1893 /* remove the card */
1894 if (card->remove)
1895 card->remove(card);
1896
1897 snd_soc_dapm_free(&card->dapm);
1898
1899 snd_card_free(card->snd_card);
1900 return 0;
1901
1902 }
1903
1904 /* removes a socdev */
1905 static int soc_remove(struct platform_device *pdev)
1906 {
1907 struct snd_soc_card *card = platform_get_drvdata(pdev);
1908
1909 snd_soc_unregister_card(card);
1910 return 0;
1911 }
1912
1913 int snd_soc_poweroff(struct device *dev)
1914 {
1915 struct snd_soc_card *card = dev_get_drvdata(dev);
1916 int i;
1917
1918 if (!card->instantiated)
1919 return 0;
1920
1921 /* Flush out pmdown_time work - we actually do want to run it
1922 * now, we're shutting down so no imminent restart. */
1923 for (i = 0; i < card->num_rtd; i++) {
1924 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1925 flush_delayed_work(&rtd->delayed_work);
1926 }
1927
1928 snd_soc_dapm_shutdown(card);
1929
1930 return 0;
1931 }
1932 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1933
1934 const struct dev_pm_ops snd_soc_pm_ops = {
1935 .suspend = snd_soc_suspend,
1936 .resume = snd_soc_resume,
1937 .freeze = snd_soc_suspend,
1938 .thaw = snd_soc_resume,
1939 .poweroff = snd_soc_poweroff,
1940 .restore = snd_soc_resume,
1941 };
1942 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1943
1944 /* ASoC platform driver */
1945 static struct platform_driver soc_driver = {
1946 .driver = {
1947 .name = "soc-audio",
1948 .owner = THIS_MODULE,
1949 .pm = &snd_soc_pm_ops,
1950 },
1951 .probe = soc_probe,
1952 .remove = soc_remove,
1953 };
1954
1955 /**
1956 * snd_soc_codec_volatile_register: Report if a register is volatile.
1957 *
1958 * @codec: CODEC to query.
1959 * @reg: Register to query.
1960 *
1961 * Boolean function indiciating if a CODEC register is volatile.
1962 */
1963 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1964 unsigned int reg)
1965 {
1966 if (codec->volatile_register)
1967 return codec->volatile_register(codec, reg);
1968 else
1969 return 0;
1970 }
1971 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1972
1973 /**
1974 * snd_soc_codec_readable_register: Report if a register is readable.
1975 *
1976 * @codec: CODEC to query.
1977 * @reg: Register to query.
1978 *
1979 * Boolean function indicating if a CODEC register is readable.
1980 */
1981 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1982 unsigned int reg)
1983 {
1984 if (codec->readable_register)
1985 return codec->readable_register(codec, reg);
1986 else
1987 return 1;
1988 }
1989 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1990
1991 /**
1992 * snd_soc_codec_writable_register: Report if a register is writable.
1993 *
1994 * @codec: CODEC to query.
1995 * @reg: Register to query.
1996 *
1997 * Boolean function indicating if a CODEC register is writable.
1998 */
1999 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2000 unsigned int reg)
2001 {
2002 if (codec->writable_register)
2003 return codec->writable_register(codec, reg);
2004 else
2005 return 1;
2006 }
2007 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2008
2009 int snd_soc_platform_read(struct snd_soc_platform *platform,
2010 unsigned int reg)
2011 {
2012 unsigned int ret;
2013
2014 if (!platform->driver->read) {
2015 dev_err(platform->dev, "ASoC: platform has no read back\n");
2016 return -1;
2017 }
2018
2019 ret = platform->driver->read(platform, reg);
2020 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
2021 trace_snd_soc_preg_read(platform, reg, ret);
2022
2023 return ret;
2024 }
2025 EXPORT_SYMBOL_GPL(snd_soc_platform_read);
2026
2027 int snd_soc_platform_write(struct snd_soc_platform *platform,
2028 unsigned int reg, unsigned int val)
2029 {
2030 if (!platform->driver->write) {
2031 dev_err(platform->dev, "ASoC: platform has no write back\n");
2032 return -1;
2033 }
2034
2035 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
2036 trace_snd_soc_preg_write(platform, reg, val);
2037 return platform->driver->write(platform, reg, val);
2038 }
2039 EXPORT_SYMBOL_GPL(snd_soc_platform_write);
2040
2041 /**
2042 * snd_soc_new_ac97_codec - initailise AC97 device
2043 * @codec: audio codec
2044 * @ops: AC97 bus operations
2045 * @num: AC97 codec number
2046 *
2047 * Initialises AC97 codec resources for use by ad-hoc devices only.
2048 */
2049 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2050 struct snd_ac97_bus_ops *ops, int num)
2051 {
2052 mutex_lock(&codec->mutex);
2053
2054 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2055 if (codec->ac97 == NULL) {
2056 mutex_unlock(&codec->mutex);
2057 return -ENOMEM;
2058 }
2059
2060 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2061 if (codec->ac97->bus == NULL) {
2062 kfree(codec->ac97);
2063 codec->ac97 = NULL;
2064 mutex_unlock(&codec->mutex);
2065 return -ENOMEM;
2066 }
2067
2068 codec->ac97->bus->ops = ops;
2069 codec->ac97->num = num;
2070
2071 /*
2072 * Mark the AC97 device to be created by us. This way we ensure that the
2073 * device will be registered with the device subsystem later on.
2074 */
2075 codec->ac97_created = 1;
2076
2077 mutex_unlock(&codec->mutex);
2078 return 0;
2079 }
2080 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2081
2082 /**
2083 * snd_soc_free_ac97_codec - free AC97 codec device
2084 * @codec: audio codec
2085 *
2086 * Frees AC97 codec device resources.
2087 */
2088 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2089 {
2090 mutex_lock(&codec->mutex);
2091 #ifdef CONFIG_SND_SOC_AC97_BUS
2092 soc_unregister_ac97_dai_link(codec);
2093 #endif
2094 kfree(codec->ac97->bus);
2095 kfree(codec->ac97);
2096 codec->ac97 = NULL;
2097 codec->ac97_created = 0;
2098 mutex_unlock(&codec->mutex);
2099 }
2100 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2101
2102 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2103 {
2104 unsigned int ret;
2105
2106 ret = codec->read(codec, reg);
2107 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2108 trace_snd_soc_reg_read(codec, reg, ret);
2109
2110 return ret;
2111 }
2112 EXPORT_SYMBOL_GPL(snd_soc_read);
2113
2114 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2115 unsigned int reg, unsigned int val)
2116 {
2117 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2118 trace_snd_soc_reg_write(codec, reg, val);
2119 return codec->write(codec, reg, val);
2120 }
2121 EXPORT_SYMBOL_GPL(snd_soc_write);
2122
2123 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2124 unsigned int reg, const void *data, size_t len)
2125 {
2126 return codec->bulk_write_raw(codec, reg, data, len);
2127 }
2128 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2129
2130 /**
2131 * snd_soc_update_bits - update codec register bits
2132 * @codec: audio codec
2133 * @reg: codec register
2134 * @mask: register mask
2135 * @value: new value
2136 *
2137 * Writes new register value.
2138 *
2139 * Returns 1 for change, 0 for no change, or negative error code.
2140 */
2141 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2142 unsigned int mask, unsigned int value)
2143 {
2144 bool change;
2145 unsigned int old, new;
2146 int ret;
2147
2148 if (codec->using_regmap) {
2149 ret = regmap_update_bits_check(codec->control_data, reg,
2150 mask, value, &change);
2151 } else {
2152 ret = snd_soc_read(codec, reg);
2153 if (ret < 0)
2154 return ret;
2155
2156 old = ret;
2157 new = (old & ~mask) | (value & mask);
2158 change = old != new;
2159 if (change)
2160 ret = snd_soc_write(codec, reg, new);
2161 }
2162
2163 if (ret < 0)
2164 return ret;
2165
2166 return change;
2167 }
2168 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2169
2170 /**
2171 * snd_soc_update_bits_locked - update codec register bits
2172 * @codec: audio codec
2173 * @reg: codec register
2174 * @mask: register mask
2175 * @value: new value
2176 *
2177 * Writes new register value, and takes the codec mutex.
2178 *
2179 * Returns 1 for change else 0.
2180 */
2181 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2182 unsigned short reg, unsigned int mask,
2183 unsigned int value)
2184 {
2185 int change;
2186
2187 mutex_lock(&codec->mutex);
2188 change = snd_soc_update_bits(codec, reg, mask, value);
2189 mutex_unlock(&codec->mutex);
2190
2191 return change;
2192 }
2193 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2194
2195 /**
2196 * snd_soc_test_bits - test register for change
2197 * @codec: audio codec
2198 * @reg: codec register
2199 * @mask: register mask
2200 * @value: new value
2201 *
2202 * Tests a register with a new value and checks if the new value is
2203 * different from the old value.
2204 *
2205 * Returns 1 for change else 0.
2206 */
2207 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2208 unsigned int mask, unsigned int value)
2209 {
2210 int change;
2211 unsigned int old, new;
2212
2213 old = snd_soc_read(codec, reg);
2214 new = (old & ~mask) | value;
2215 change = old != new;
2216
2217 return change;
2218 }
2219 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2220
2221 /**
2222 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2223 * @substream: the pcm substream
2224 * @hw: the hardware parameters
2225 *
2226 * Sets the substream runtime hardware parameters.
2227 */
2228 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2229 const struct snd_pcm_hardware *hw)
2230 {
2231 struct snd_pcm_runtime *runtime = substream->runtime;
2232 runtime->hw.info = hw->info;
2233 runtime->hw.formats = hw->formats;
2234 runtime->hw.period_bytes_min = hw->period_bytes_min;
2235 runtime->hw.period_bytes_max = hw->period_bytes_max;
2236 runtime->hw.periods_min = hw->periods_min;
2237 runtime->hw.periods_max = hw->periods_max;
2238 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2239 runtime->hw.fifo_size = hw->fifo_size;
2240 return 0;
2241 }
2242 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2243
2244 /**
2245 * snd_soc_cnew - create new control
2246 * @_template: control template
2247 * @data: control private data
2248 * @long_name: control long name
2249 * @prefix: control name prefix
2250 *
2251 * Create a new mixer control from a template control.
2252 *
2253 * Returns 0 for success, else error.
2254 */
2255 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2256 void *data, const char *long_name,
2257 const char *prefix)
2258 {
2259 struct snd_kcontrol_new template;
2260 struct snd_kcontrol *kcontrol;
2261 char *name = NULL;
2262 int name_len;
2263
2264 memcpy(&template, _template, sizeof(template));
2265 template.index = 0;
2266
2267 if (!long_name)
2268 long_name = template.name;
2269
2270 if (prefix) {
2271 name_len = strlen(long_name) + strlen(prefix) + 2;
2272 name = kmalloc(name_len, GFP_KERNEL);
2273 if (!name)
2274 return NULL;
2275
2276 snprintf(name, name_len, "%s %s", prefix, long_name);
2277
2278 template.name = name;
2279 } else {
2280 template.name = long_name;
2281 }
2282
2283 kcontrol = snd_ctl_new1(&template, data);
2284
2285 kfree(name);
2286
2287 return kcontrol;
2288 }
2289 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2290
2291 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2292 const struct snd_kcontrol_new *controls, int num_controls,
2293 const char *prefix, void *data)
2294 {
2295 int err, i;
2296
2297 for (i = 0; i < num_controls; i++) {
2298 const struct snd_kcontrol_new *control = &controls[i];
2299 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2300 control->name, prefix));
2301 if (err < 0) {
2302 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2303 control->name, err);
2304 return err;
2305 }
2306 }
2307
2308 return 0;
2309 }
2310
2311 /**
2312 * snd_soc_add_codec_controls - add an array of controls to a codec.
2313 * Convenience function to add a list of controls. Many codecs were
2314 * duplicating this code.
2315 *
2316 * @codec: codec to add controls to
2317 * @controls: array of controls to add
2318 * @num_controls: number of elements in the array
2319 *
2320 * Return 0 for success, else error.
2321 */
2322 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2323 const struct snd_kcontrol_new *controls, int num_controls)
2324 {
2325 struct snd_card *card = codec->card->snd_card;
2326
2327 return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2328 codec->name_prefix, codec);
2329 }
2330 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2331
2332 /**
2333 * snd_soc_add_platform_controls - add an array of controls to a platform.
2334 * Convenience function to add a list of controls.
2335 *
2336 * @platform: platform to add controls to
2337 * @controls: array of controls to add
2338 * @num_controls: number of elements in the array
2339 *
2340 * Return 0 for success, else error.
2341 */
2342 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2343 const struct snd_kcontrol_new *controls, int num_controls)
2344 {
2345 struct snd_card *card = platform->card->snd_card;
2346
2347 return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2348 NULL, platform);
2349 }
2350 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2351
2352 /**
2353 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2354 * Convenience function to add a list of controls.
2355 *
2356 * @soc_card: SoC card to add controls to
2357 * @controls: array of controls to add
2358 * @num_controls: number of elements in the array
2359 *
2360 * Return 0 for success, else error.
2361 */
2362 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2363 const struct snd_kcontrol_new *controls, int num_controls)
2364 {
2365 struct snd_card *card = soc_card->snd_card;
2366
2367 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2368 NULL, soc_card);
2369 }
2370 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2371
2372 /**
2373 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2374 * Convienience function to add a list of controls.
2375 *
2376 * @dai: DAI to add controls to
2377 * @controls: array of controls to add
2378 * @num_controls: number of elements in the array
2379 *
2380 * Return 0 for success, else error.
2381 */
2382 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2383 const struct snd_kcontrol_new *controls, int num_controls)
2384 {
2385 struct snd_card *card = dai->card->snd_card;
2386
2387 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2388 NULL, dai);
2389 }
2390 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2391
2392 /**
2393 * snd_soc_info_enum_double - enumerated double mixer info callback
2394 * @kcontrol: mixer control
2395 * @uinfo: control element information
2396 *
2397 * Callback to provide information about a double enumerated
2398 * mixer control.
2399 *
2400 * Returns 0 for success.
2401 */
2402 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2403 struct snd_ctl_elem_info *uinfo)
2404 {
2405 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2406
2407 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2408 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2409 uinfo->value.enumerated.items = e->max;
2410
2411 if (uinfo->value.enumerated.item > e->max - 1)
2412 uinfo->value.enumerated.item = e->max - 1;
2413 strcpy(uinfo->value.enumerated.name,
2414 e->texts[uinfo->value.enumerated.item]);
2415 return 0;
2416 }
2417 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2418
2419 /**
2420 * snd_soc_get_enum_double - enumerated double mixer get callback
2421 * @kcontrol: mixer control
2422 * @ucontrol: control element information
2423 *
2424 * Callback to get the value of a double enumerated mixer.
2425 *
2426 * Returns 0 for success.
2427 */
2428 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2429 struct snd_ctl_elem_value *ucontrol)
2430 {
2431 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2432 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2433 unsigned int val;
2434
2435 val = snd_soc_read(codec, e->reg);
2436 ucontrol->value.enumerated.item[0]
2437 = (val >> e->shift_l) & e->mask;
2438 if (e->shift_l != e->shift_r)
2439 ucontrol->value.enumerated.item[1] =
2440 (val >> e->shift_r) & e->mask;
2441
2442 return 0;
2443 }
2444 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2445
2446 /**
2447 * snd_soc_put_enum_double - enumerated double mixer put callback
2448 * @kcontrol: mixer control
2449 * @ucontrol: control element information
2450 *
2451 * Callback to set the value of a double enumerated mixer.
2452 *
2453 * Returns 0 for success.
2454 */
2455 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2456 struct snd_ctl_elem_value *ucontrol)
2457 {
2458 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2459 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2460 unsigned int val;
2461 unsigned int mask;
2462
2463 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2464 return -EINVAL;
2465 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2466 mask = e->mask << e->shift_l;
2467 if (e->shift_l != e->shift_r) {
2468 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2469 return -EINVAL;
2470 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2471 mask |= e->mask << e->shift_r;
2472 }
2473
2474 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2475 }
2476 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2477
2478 /**
2479 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2480 * @kcontrol: mixer control
2481 * @ucontrol: control element information
2482 *
2483 * Callback to get the value of a double semi enumerated mixer.
2484 *
2485 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2486 * used for handling bitfield coded enumeration for example.
2487 *
2488 * Returns 0 for success.
2489 */
2490 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2491 struct snd_ctl_elem_value *ucontrol)
2492 {
2493 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2494 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2495 unsigned int reg_val, val, mux;
2496
2497 reg_val = snd_soc_read(codec, e->reg);
2498 val = (reg_val >> e->shift_l) & e->mask;
2499 for (mux = 0; mux < e->max; mux++) {
2500 if (val == e->values[mux])
2501 break;
2502 }
2503 ucontrol->value.enumerated.item[0] = mux;
2504 if (e->shift_l != e->shift_r) {
2505 val = (reg_val >> e->shift_r) & e->mask;
2506 for (mux = 0; mux < e->max; mux++) {
2507 if (val == e->values[mux])
2508 break;
2509 }
2510 ucontrol->value.enumerated.item[1] = mux;
2511 }
2512
2513 return 0;
2514 }
2515 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2516
2517 /**
2518 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2519 * @kcontrol: mixer control
2520 * @ucontrol: control element information
2521 *
2522 * Callback to set the value of a double semi enumerated mixer.
2523 *
2524 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2525 * used for handling bitfield coded enumeration for example.
2526 *
2527 * Returns 0 for success.
2528 */
2529 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2530 struct snd_ctl_elem_value *ucontrol)
2531 {
2532 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2533 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2534 unsigned int val;
2535 unsigned int mask;
2536
2537 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2538 return -EINVAL;
2539 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2540 mask = e->mask << e->shift_l;
2541 if (e->shift_l != e->shift_r) {
2542 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2543 return -EINVAL;
2544 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2545 mask |= e->mask << e->shift_r;
2546 }
2547
2548 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2549 }
2550 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2551
2552 /**
2553 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2554 * @kcontrol: mixer control
2555 * @uinfo: control element information
2556 *
2557 * Callback to provide information about an external enumerated
2558 * single mixer.
2559 *
2560 * Returns 0 for success.
2561 */
2562 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2563 struct snd_ctl_elem_info *uinfo)
2564 {
2565 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2566
2567 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2568 uinfo->count = 1;
2569 uinfo->value.enumerated.items = e->max;
2570
2571 if (uinfo->value.enumerated.item > e->max - 1)
2572 uinfo->value.enumerated.item = e->max - 1;
2573 strcpy(uinfo->value.enumerated.name,
2574 e->texts[uinfo->value.enumerated.item]);
2575 return 0;
2576 }
2577 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2578
2579 /**
2580 * snd_soc_info_volsw_ext - external single mixer info callback
2581 * @kcontrol: mixer control
2582 * @uinfo: control element information
2583 *
2584 * Callback to provide information about a single external mixer control.
2585 *
2586 * Returns 0 for success.
2587 */
2588 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2589 struct snd_ctl_elem_info *uinfo)
2590 {
2591 int max = kcontrol->private_value;
2592
2593 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2594 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2595 else
2596 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2597
2598 uinfo->count = 1;
2599 uinfo->value.integer.min = 0;
2600 uinfo->value.integer.max = max;
2601 return 0;
2602 }
2603 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2604
2605 /**
2606 * snd_soc_info_volsw - single mixer info callback
2607 * @kcontrol: mixer control
2608 * @uinfo: control element information
2609 *
2610 * Callback to provide information about a single mixer control, or a double
2611 * mixer control that spans 2 registers.
2612 *
2613 * Returns 0 for success.
2614 */
2615 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2616 struct snd_ctl_elem_info *uinfo)
2617 {
2618 struct soc_mixer_control *mc =
2619 (struct soc_mixer_control *)kcontrol->private_value;
2620 int platform_max;
2621
2622 if (!mc->platform_max)
2623 mc->platform_max = mc->max;
2624 platform_max = mc->platform_max;
2625
2626 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2627 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2628 else
2629 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2630
2631 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2632 uinfo->value.integer.min = 0;
2633 uinfo->value.integer.max = platform_max;
2634 return 0;
2635 }
2636 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2637
2638 /**
2639 * snd_soc_get_volsw - single mixer get callback
2640 * @kcontrol: mixer control
2641 * @ucontrol: control element information
2642 *
2643 * Callback to get the value of a single mixer control, or a double mixer
2644 * control that spans 2 registers.
2645 *
2646 * Returns 0 for success.
2647 */
2648 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2649 struct snd_ctl_elem_value *ucontrol)
2650 {
2651 struct soc_mixer_control *mc =
2652 (struct soc_mixer_control *)kcontrol->private_value;
2653 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2654 unsigned int reg = mc->reg;
2655 unsigned int reg2 = mc->rreg;
2656 unsigned int shift = mc->shift;
2657 unsigned int rshift = mc->rshift;
2658 int max = mc->max;
2659 unsigned int mask = (1 << fls(max)) - 1;
2660 unsigned int invert = mc->invert;
2661
2662 ucontrol->value.integer.value[0] =
2663 (snd_soc_read(codec, reg) >> shift) & mask;
2664 if (invert)
2665 ucontrol->value.integer.value[0] =
2666 max - ucontrol->value.integer.value[0];
2667
2668 if (snd_soc_volsw_is_stereo(mc)) {
2669 if (reg == reg2)
2670 ucontrol->value.integer.value[1] =
2671 (snd_soc_read(codec, reg) >> rshift) & mask;
2672 else
2673 ucontrol->value.integer.value[1] =
2674 (snd_soc_read(codec, reg2) >> shift) & mask;
2675 if (invert)
2676 ucontrol->value.integer.value[1] =
2677 max - ucontrol->value.integer.value[1];
2678 }
2679
2680 return 0;
2681 }
2682 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2683
2684 /**
2685 * snd_soc_put_volsw - single mixer put callback
2686 * @kcontrol: mixer control
2687 * @ucontrol: control element information
2688 *
2689 * Callback to set the value of a single mixer control, or a double mixer
2690 * control that spans 2 registers.
2691 *
2692 * Returns 0 for success.
2693 */
2694 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2695 struct snd_ctl_elem_value *ucontrol)
2696 {
2697 struct soc_mixer_control *mc =
2698 (struct soc_mixer_control *)kcontrol->private_value;
2699 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2700 unsigned int reg = mc->reg;
2701 unsigned int reg2 = mc->rreg;
2702 unsigned int shift = mc->shift;
2703 unsigned int rshift = mc->rshift;
2704 int max = mc->max;
2705 unsigned int mask = (1 << fls(max)) - 1;
2706 unsigned int invert = mc->invert;
2707 int err;
2708 bool type_2r = 0;
2709 unsigned int val2 = 0;
2710 unsigned int val, val_mask;
2711
2712 val = (ucontrol->value.integer.value[0] & mask);
2713 if (invert)
2714 val = max - val;
2715 val_mask = mask << shift;
2716 val = val << shift;
2717 if (snd_soc_volsw_is_stereo(mc)) {
2718 val2 = (ucontrol->value.integer.value[1] & mask);
2719 if (invert)
2720 val2 = max - val2;
2721 if (reg == reg2) {
2722 val_mask |= mask << rshift;
2723 val |= val2 << rshift;
2724 } else {
2725 val2 = val2 << shift;
2726 type_2r = 1;
2727 }
2728 }
2729 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2730 if (err < 0)
2731 return err;
2732
2733 if (type_2r)
2734 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2735
2736 return err;
2737 }
2738 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2739
2740 /**
2741 * snd_soc_get_volsw_sx - single mixer get callback
2742 * @kcontrol: mixer control
2743 * @ucontrol: control element information
2744 *
2745 * Callback to get the value of a single mixer control, or a double mixer
2746 * control that spans 2 registers.
2747 *
2748 * Returns 0 for success.
2749 */
2750 int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2751 struct snd_ctl_elem_value *ucontrol)
2752 {
2753 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2754 struct soc_mixer_control *mc =
2755 (struct soc_mixer_control *)kcontrol->private_value;
2756
2757 unsigned int reg = mc->reg;
2758 unsigned int reg2 = mc->rreg;
2759 unsigned int shift = mc->shift;
2760 unsigned int rshift = mc->rshift;
2761 int max = mc->max;
2762 int min = mc->min;
2763 int mask = (1 << (fls(min + max) - 1)) - 1;
2764
2765 ucontrol->value.integer.value[0] =
2766 ((snd_soc_read(codec, reg) >> shift) - min) & mask;
2767
2768 if (snd_soc_volsw_is_stereo(mc))
2769 ucontrol->value.integer.value[1] =
2770 ((snd_soc_read(codec, reg2) >> rshift) - min) & mask;
2771
2772 return 0;
2773 }
2774 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2775
2776 /**
2777 * snd_soc_put_volsw_sx - double mixer set callback
2778 * @kcontrol: mixer control
2779 * @uinfo: control element information
2780 *
2781 * Callback to set the value of a double mixer control that spans 2 registers.
2782 *
2783 * Returns 0 for success.
2784 */
2785 int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2786 struct snd_ctl_elem_value *ucontrol)
2787 {
2788 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2789 struct soc_mixer_control *mc =
2790 (struct soc_mixer_control *)kcontrol->private_value;
2791
2792 unsigned int reg = mc->reg;
2793 unsigned int reg2 = mc->rreg;
2794 unsigned int shift = mc->shift;
2795 unsigned int rshift = mc->rshift;
2796 int max = mc->max;
2797 int min = mc->min;
2798 int mask = (1 << (fls(min + max) - 1)) - 1;
2799 int err = 0;
2800 unsigned short val, val_mask, val2 = 0;
2801
2802 val_mask = mask << shift;
2803 val = (ucontrol->value.integer.value[0] + min) & mask;
2804 val = val << shift;
2805
2806 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2807 if (err < 0)
2808 return err;
2809
2810 if (snd_soc_volsw_is_stereo(mc)) {
2811 val_mask = mask << rshift;
2812 val2 = (ucontrol->value.integer.value[1] + min) & mask;
2813 val2 = val2 << rshift;
2814
2815 if (snd_soc_update_bits_locked(codec, reg2, val_mask, val2))
2816 return err;
2817 }
2818 return 0;
2819 }
2820 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2821
2822 /**
2823 * snd_soc_info_volsw_s8 - signed mixer info callback
2824 * @kcontrol: mixer control
2825 * @uinfo: control element information
2826 *
2827 * Callback to provide information about a signed mixer control.
2828 *
2829 * Returns 0 for success.
2830 */
2831 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2832 struct snd_ctl_elem_info *uinfo)
2833 {
2834 struct soc_mixer_control *mc =
2835 (struct soc_mixer_control *)kcontrol->private_value;
2836 int platform_max;
2837 int min = mc->min;
2838
2839 if (!mc->platform_max)
2840 mc->platform_max = mc->max;
2841 platform_max = mc->platform_max;
2842
2843 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2844 uinfo->count = 2;
2845 uinfo->value.integer.min = 0;
2846 uinfo->value.integer.max = platform_max - min;
2847 return 0;
2848 }
2849 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2850
2851 /**
2852 * snd_soc_get_volsw_s8 - signed mixer get callback
2853 * @kcontrol: mixer control
2854 * @ucontrol: control element information
2855 *
2856 * Callback to get the value of a signed mixer control.
2857 *
2858 * Returns 0 for success.
2859 */
2860 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2861 struct snd_ctl_elem_value *ucontrol)
2862 {
2863 struct soc_mixer_control *mc =
2864 (struct soc_mixer_control *)kcontrol->private_value;
2865 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2866 unsigned int reg = mc->reg;
2867 int min = mc->min;
2868 int val = snd_soc_read(codec, reg);
2869
2870 ucontrol->value.integer.value[0] =
2871 ((signed char)(val & 0xff))-min;
2872 ucontrol->value.integer.value[1] =
2873 ((signed char)((val >> 8) & 0xff))-min;
2874 return 0;
2875 }
2876 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2877
2878 /**
2879 * snd_soc_put_volsw_sgn - signed mixer put callback
2880 * @kcontrol: mixer control
2881 * @ucontrol: control element information
2882 *
2883 * Callback to set the value of a signed mixer control.
2884 *
2885 * Returns 0 for success.
2886 */
2887 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2888 struct snd_ctl_elem_value *ucontrol)
2889 {
2890 struct soc_mixer_control *mc =
2891 (struct soc_mixer_control *)kcontrol->private_value;
2892 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2893 unsigned int reg = mc->reg;
2894 int min = mc->min;
2895 unsigned int val;
2896
2897 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2898 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2899
2900 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2901 }
2902 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2903
2904 /**
2905 * snd_soc_info_volsw_range - single mixer info callback with range.
2906 * @kcontrol: mixer control
2907 * @uinfo: control element information
2908 *
2909 * Callback to provide information, within a range, about a single
2910 * mixer control.
2911 *
2912 * returns 0 for success.
2913 */
2914 int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
2915 struct snd_ctl_elem_info *uinfo)
2916 {
2917 struct soc_mixer_control *mc =
2918 (struct soc_mixer_control *)kcontrol->private_value;
2919 int platform_max;
2920 int min = mc->min;
2921
2922 if (!mc->platform_max)
2923 mc->platform_max = mc->max;
2924 platform_max = mc->platform_max;
2925
2926 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2927 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2928 uinfo->value.integer.min = 0;
2929 uinfo->value.integer.max = platform_max - min;
2930
2931 return 0;
2932 }
2933 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
2934
2935 /**
2936 * snd_soc_put_volsw_range - single mixer put value callback with range.
2937 * @kcontrol: mixer control
2938 * @ucontrol: control element information
2939 *
2940 * Callback to set the value, within a range, for a single mixer control.
2941 *
2942 * Returns 0 for success.
2943 */
2944 int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
2945 struct snd_ctl_elem_value *ucontrol)
2946 {
2947 struct soc_mixer_control *mc =
2948 (struct soc_mixer_control *)kcontrol->private_value;
2949 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2950 unsigned int reg = mc->reg;
2951 unsigned int rreg = mc->rreg;
2952 unsigned int shift = mc->shift;
2953 int min = mc->min;
2954 int max = mc->max;
2955 unsigned int mask = (1 << fls(max)) - 1;
2956 unsigned int invert = mc->invert;
2957 unsigned int val, val_mask;
2958 int ret;
2959
2960 val = ((ucontrol->value.integer.value[0] + min) & mask);
2961 if (invert)
2962 val = max - val;
2963 val_mask = mask << shift;
2964 val = val << shift;
2965
2966 ret = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2967 if (ret < 0)
2968 return ret;
2969
2970 if (snd_soc_volsw_is_stereo(mc)) {
2971 val = ((ucontrol->value.integer.value[1] + min) & mask);
2972 if (invert)
2973 val = max - val;
2974 val_mask = mask << shift;
2975 val = val << shift;
2976
2977 ret = snd_soc_update_bits_locked(codec, rreg, val_mask, val);
2978 }
2979
2980 return ret;
2981 }
2982 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
2983
2984 /**
2985 * snd_soc_get_volsw_range - single mixer get callback with range
2986 * @kcontrol: mixer control
2987 * @ucontrol: control element information
2988 *
2989 * Callback to get the value, within a range, of a single mixer control.
2990 *
2991 * Returns 0 for success.
2992 */
2993 int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
2994 struct snd_ctl_elem_value *ucontrol)
2995 {
2996 struct soc_mixer_control *mc =
2997 (struct soc_mixer_control *)kcontrol->private_value;
2998 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2999 unsigned int reg = mc->reg;
3000 unsigned int rreg = mc->rreg;
3001 unsigned int shift = mc->shift;
3002 int min = mc->min;
3003 int max = mc->max;
3004 unsigned int mask = (1 << fls(max)) - 1;
3005 unsigned int invert = mc->invert;
3006
3007 ucontrol->value.integer.value[0] =
3008 (snd_soc_read(codec, reg) >> shift) & mask;
3009 if (invert)
3010 ucontrol->value.integer.value[0] =
3011 max - ucontrol->value.integer.value[0];
3012 ucontrol->value.integer.value[0] =
3013 ucontrol->value.integer.value[0] - min;
3014
3015 if (snd_soc_volsw_is_stereo(mc)) {
3016 ucontrol->value.integer.value[1] =
3017 (snd_soc_read(codec, rreg) >> shift) & mask;
3018 if (invert)
3019 ucontrol->value.integer.value[1] =
3020 max - ucontrol->value.integer.value[1];
3021 ucontrol->value.integer.value[1] =
3022 ucontrol->value.integer.value[1] - min;
3023 }
3024
3025 return 0;
3026 }
3027 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
3028
3029 /**
3030 * snd_soc_limit_volume - Set new limit to an existing volume control.
3031 *
3032 * @codec: where to look for the control
3033 * @name: Name of the control
3034 * @max: new maximum limit
3035 *
3036 * Return 0 for success, else error.
3037 */
3038 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3039 const char *name, int max)
3040 {
3041 struct snd_card *card = codec->card->snd_card;
3042 struct snd_kcontrol *kctl;
3043 struct soc_mixer_control *mc;
3044 int found = 0;
3045 int ret = -EINVAL;
3046
3047 /* Sanity check for name and max */
3048 if (unlikely(!name || max <= 0))
3049 return -EINVAL;
3050
3051 list_for_each_entry(kctl, &card->controls, list) {
3052 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3053 found = 1;
3054 break;
3055 }
3056 }
3057 if (found) {
3058 mc = (struct soc_mixer_control *)kctl->private_value;
3059 if (max <= mc->max) {
3060 mc->platform_max = max;
3061 ret = 0;
3062 }
3063 }
3064 return ret;
3065 }
3066 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3067
3068 int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
3069 struct snd_ctl_elem_info *uinfo)
3070 {
3071 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3072 struct soc_bytes *params = (void *)kcontrol->private_value;
3073
3074 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3075 uinfo->count = params->num_regs * codec->val_bytes;
3076
3077 return 0;
3078 }
3079 EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
3080
3081 int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
3082 struct snd_ctl_elem_value *ucontrol)
3083 {
3084 struct soc_bytes *params = (void *)kcontrol->private_value;
3085 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3086 int ret;
3087
3088 if (codec->using_regmap)
3089 ret = regmap_raw_read(codec->control_data, params->base,
3090 ucontrol->value.bytes.data,
3091 params->num_regs * codec->val_bytes);
3092 else
3093 ret = -EINVAL;
3094
3095 /* Hide any masked bytes to ensure consistent data reporting */
3096 if (ret == 0 && params->mask) {
3097 switch (codec->val_bytes) {
3098 case 1:
3099 ucontrol->value.bytes.data[0] &= ~params->mask;
3100 break;
3101 case 2:
3102 ((u16 *)(&ucontrol->value.bytes.data))[0]
3103 &= ~params->mask;
3104 break;
3105 case 4:
3106 ((u32 *)(&ucontrol->value.bytes.data))[0]
3107 &= ~params->mask;
3108 break;
3109 default:
3110 return -EINVAL;
3111 }
3112 }
3113
3114 return ret;
3115 }
3116 EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
3117
3118 int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
3119 struct snd_ctl_elem_value *ucontrol)
3120 {
3121 struct soc_bytes *params = (void *)kcontrol->private_value;
3122 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3123 int ret, len;
3124 unsigned int val;
3125 void *data;
3126
3127 if (!codec->using_regmap)
3128 return -EINVAL;
3129
3130 len = params->num_regs * codec->val_bytes;
3131
3132 data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
3133 if (!data)
3134 return -ENOMEM;
3135
3136 /*
3137 * If we've got a mask then we need to preserve the register
3138 * bits. We shouldn't modify the incoming data so take a
3139 * copy.
3140 */
3141 if (params->mask) {
3142 ret = regmap_read(codec->control_data, params->base, &val);
3143 if (ret != 0)
3144 goto out;
3145
3146 val &= params->mask;
3147
3148 switch (codec->val_bytes) {
3149 case 1:
3150 ((u8 *)data)[0] &= ~params->mask;
3151 ((u8 *)data)[0] |= val;
3152 break;
3153 case 2:
3154 ((u16 *)data)[0] &= cpu_to_be16(~params->mask);
3155 ((u16 *)data)[0] |= cpu_to_be16(val);
3156 break;
3157 case 4:
3158 ((u32 *)data)[0] &= cpu_to_be32(~params->mask);
3159 ((u32 *)data)[0] |= cpu_to_be32(val);
3160 break;
3161 default:
3162 ret = -EINVAL;
3163 goto out;
3164 }
3165 }
3166
3167 ret = regmap_raw_write(codec->control_data, params->base,
3168 data, len);
3169
3170 out:
3171 kfree(data);
3172
3173 return ret;
3174 }
3175 EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
3176
3177 /**
3178 * snd_soc_info_xr_sx - signed multi register info callback
3179 * @kcontrol: mreg control
3180 * @uinfo: control element information
3181 *
3182 * Callback to provide information of a control that can
3183 * span multiple codec registers which together
3184 * forms a single signed value in a MSB/LSB manner.
3185 *
3186 * Returns 0 for success.
3187 */
3188 int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
3189 struct snd_ctl_elem_info *uinfo)
3190 {
3191 struct soc_mreg_control *mc =
3192 (struct soc_mreg_control *)kcontrol->private_value;
3193 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3194 uinfo->count = 1;
3195 uinfo->value.integer.min = mc->min;
3196 uinfo->value.integer.max = mc->max;
3197
3198 return 0;
3199 }
3200 EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
3201
3202 /**
3203 * snd_soc_get_xr_sx - signed multi register get callback
3204 * @kcontrol: mreg control
3205 * @ucontrol: control element information
3206 *
3207 * Callback to get the value of a control that can span
3208 * multiple codec registers which together forms a single
3209 * signed value in a MSB/LSB manner. The control supports
3210 * specifying total no of bits used to allow for bitfields
3211 * across the multiple codec registers.
3212 *
3213 * Returns 0 for success.
3214 */
3215 int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
3216 struct snd_ctl_elem_value *ucontrol)
3217 {
3218 struct soc_mreg_control *mc =
3219 (struct soc_mreg_control *)kcontrol->private_value;
3220 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3221 unsigned int regbase = mc->regbase;
3222 unsigned int regcount = mc->regcount;
3223 unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3224 unsigned int regwmask = (1<<regwshift)-1;
3225 unsigned int invert = mc->invert;
3226 unsigned long mask = (1UL<<mc->nbits)-1;
3227 long min = mc->min;
3228 long max = mc->max;
3229 long val = 0;
3230 unsigned long regval;
3231 unsigned int i;
3232
3233 for (i = 0; i < regcount; i++) {
3234 regval = snd_soc_read(codec, regbase+i) & regwmask;
3235 val |= regval << (regwshift*(regcount-i-1));
3236 }
3237 val &= mask;
3238 if (min < 0 && val > max)
3239 val |= ~mask;
3240 if (invert)
3241 val = max - val;
3242 ucontrol->value.integer.value[0] = val;
3243
3244 return 0;
3245 }
3246 EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3247
3248 /**
3249 * snd_soc_put_xr_sx - signed multi register get callback
3250 * @kcontrol: mreg control
3251 * @ucontrol: control element information
3252 *
3253 * Callback to set the value of a control that can span
3254 * multiple codec registers which together forms a single
3255 * signed value in a MSB/LSB manner. The control supports
3256 * specifying total no of bits used to allow for bitfields
3257 * across the multiple codec registers.
3258 *
3259 * Returns 0 for success.
3260 */
3261 int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3262 struct snd_ctl_elem_value *ucontrol)
3263 {
3264 struct soc_mreg_control *mc =
3265 (struct soc_mreg_control *)kcontrol->private_value;
3266 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3267 unsigned int regbase = mc->regbase;
3268 unsigned int regcount = mc->regcount;
3269 unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3270 unsigned int regwmask = (1<<regwshift)-1;
3271 unsigned int invert = mc->invert;
3272 unsigned long mask = (1UL<<mc->nbits)-1;
3273 long max = mc->max;
3274 long val = ucontrol->value.integer.value[0];
3275 unsigned int i, regval, regmask;
3276 int err;
3277
3278 if (invert)
3279 val = max - val;
3280 val &= mask;
3281 for (i = 0; i < regcount; i++) {
3282 regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3283 regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3284 err = snd_soc_update_bits_locked(codec, regbase+i,
3285 regmask, regval);
3286 if (err < 0)
3287 return err;
3288 }
3289
3290 return 0;
3291 }
3292 EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3293
3294 /**
3295 * snd_soc_get_strobe - strobe get callback
3296 * @kcontrol: mixer control
3297 * @ucontrol: control element information
3298 *
3299 * Callback get the value of a strobe mixer control.
3300 *
3301 * Returns 0 for success.
3302 */
3303 int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3304 struct snd_ctl_elem_value *ucontrol)
3305 {
3306 struct soc_mixer_control *mc =
3307 (struct soc_mixer_control *)kcontrol->private_value;
3308 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3309 unsigned int reg = mc->reg;
3310 unsigned int shift = mc->shift;
3311 unsigned int mask = 1 << shift;
3312 unsigned int invert = mc->invert != 0;
3313 unsigned int val = snd_soc_read(codec, reg) & mask;
3314
3315 if (shift != 0 && val != 0)
3316 val = val >> shift;
3317 ucontrol->value.enumerated.item[0] = val ^ invert;
3318
3319 return 0;
3320 }
3321 EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3322
3323 /**
3324 * snd_soc_put_strobe - strobe put callback
3325 * @kcontrol: mixer control
3326 * @ucontrol: control element information
3327 *
3328 * Callback strobe a register bit to high then low (or the inverse)
3329 * in one pass of a single mixer enum control.
3330 *
3331 * Returns 1 for success.
3332 */
3333 int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3334 struct snd_ctl_elem_value *ucontrol)
3335 {
3336 struct soc_mixer_control *mc =
3337 (struct soc_mixer_control *)kcontrol->private_value;
3338 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3339 unsigned int reg = mc->reg;
3340 unsigned int shift = mc->shift;
3341 unsigned int mask = 1 << shift;
3342 unsigned int invert = mc->invert != 0;
3343 unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3344 unsigned int val1 = (strobe ^ invert) ? mask : 0;
3345 unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3346 int err;
3347
3348 err = snd_soc_update_bits_locked(codec, reg, mask, val1);
3349 if (err < 0)
3350 return err;
3351
3352 err = snd_soc_update_bits_locked(codec, reg, mask, val2);
3353 return err;
3354 }
3355 EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3356
3357 /**
3358 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3359 * @dai: DAI
3360 * @clk_id: DAI specific clock ID
3361 * @freq: new clock frequency in Hz
3362 * @dir: new clock direction - input/output.
3363 *
3364 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3365 */
3366 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3367 unsigned int freq, int dir)
3368 {
3369 if (dai->driver && dai->driver->ops->set_sysclk)
3370 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3371 else if (dai->codec && dai->codec->driver->set_sysclk)
3372 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3373 freq, dir);
3374 else
3375 return -EINVAL;
3376 }
3377 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3378
3379 /**
3380 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3381 * @codec: CODEC
3382 * @clk_id: DAI specific clock ID
3383 * @source: Source for the clock
3384 * @freq: new clock frequency in Hz
3385 * @dir: new clock direction - input/output.
3386 *
3387 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3388 */
3389 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3390 int source, unsigned int freq, int dir)
3391 {
3392 if (codec->driver->set_sysclk)
3393 return codec->driver->set_sysclk(codec, clk_id, source,
3394 freq, dir);
3395 else
3396 return -EINVAL;
3397 }
3398 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3399
3400 /**
3401 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3402 * @dai: DAI
3403 * @div_id: DAI specific clock divider ID
3404 * @div: new clock divisor.
3405 *
3406 * Configures the clock dividers. This is used to derive the best DAI bit and
3407 * frame clocks from the system or master clock. It's best to set the DAI bit
3408 * and frame clocks as low as possible to save system power.
3409 */
3410 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3411 int div_id, int div)
3412 {
3413 if (dai->driver && dai->driver->ops->set_clkdiv)
3414 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3415 else
3416 return -EINVAL;
3417 }
3418 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3419
3420 /**
3421 * snd_soc_dai_set_pll - configure DAI PLL.
3422 * @dai: DAI
3423 * @pll_id: DAI specific PLL ID
3424 * @source: DAI specific source for the PLL
3425 * @freq_in: PLL input clock frequency in Hz
3426 * @freq_out: requested PLL output clock frequency in Hz
3427 *
3428 * Configures and enables PLL to generate output clock based on input clock.
3429 */
3430 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3431 unsigned int freq_in, unsigned int freq_out)
3432 {
3433 if (dai->driver && dai->driver->ops->set_pll)
3434 return dai->driver->ops->set_pll(dai, pll_id, source,
3435 freq_in, freq_out);
3436 else if (dai->codec && dai->codec->driver->set_pll)
3437 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3438 freq_in, freq_out);
3439 else
3440 return -EINVAL;
3441 }
3442 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3443
3444 /*
3445 * snd_soc_codec_set_pll - configure codec PLL.
3446 * @codec: CODEC
3447 * @pll_id: DAI specific PLL ID
3448 * @source: DAI specific source for the PLL
3449 * @freq_in: PLL input clock frequency in Hz
3450 * @freq_out: requested PLL output clock frequency in Hz
3451 *
3452 * Configures and enables PLL to generate output clock based on input clock.
3453 */
3454 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3455 unsigned int freq_in, unsigned int freq_out)
3456 {
3457 if (codec->driver->set_pll)
3458 return codec->driver->set_pll(codec, pll_id, source,
3459 freq_in, freq_out);
3460 else
3461 return -EINVAL;
3462 }
3463 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3464
3465 /**
3466 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3467 * @dai: DAI
3468 * @fmt: SND_SOC_DAIFMT_ format value.
3469 *
3470 * Configures the DAI hardware format and clocking.
3471 */
3472 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3473 {
3474 if (dai->driver == NULL)
3475 return -EINVAL;
3476 if (dai->driver->ops->set_fmt == NULL)
3477 return -ENOTSUPP;
3478 return dai->driver->ops->set_fmt(dai, fmt);
3479 }
3480 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3481
3482 /**
3483 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3484 * @dai: DAI
3485 * @tx_mask: bitmask representing active TX slots.
3486 * @rx_mask: bitmask representing active RX slots.
3487 * @slots: Number of slots in use.
3488 * @slot_width: Width in bits for each slot.
3489 *
3490 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3491 * specific.
3492 */
3493 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3494 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3495 {
3496 if (dai->driver && dai->driver->ops->set_tdm_slot)
3497 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3498 slots, slot_width);
3499 else
3500 return -EINVAL;
3501 }
3502 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3503
3504 /**
3505 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3506 * @dai: DAI
3507 * @tx_num: how many TX channels
3508 * @tx_slot: pointer to an array which imply the TX slot number channel
3509 * 0~num-1 uses
3510 * @rx_num: how many RX channels
3511 * @rx_slot: pointer to an array which imply the RX slot number channel
3512 * 0~num-1 uses
3513 *
3514 * configure the relationship between channel number and TDM slot number.
3515 */
3516 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3517 unsigned int tx_num, unsigned int *tx_slot,
3518 unsigned int rx_num, unsigned int *rx_slot)
3519 {
3520 if (dai->driver && dai->driver->ops->set_channel_map)
3521 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3522 rx_num, rx_slot);
3523 else
3524 return -EINVAL;
3525 }
3526 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3527
3528 /**
3529 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3530 * @dai: DAI
3531 * @tristate: tristate enable
3532 *
3533 * Tristates the DAI so that others can use it.
3534 */
3535 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3536 {
3537 if (dai->driver && dai->driver->ops->set_tristate)
3538 return dai->driver->ops->set_tristate(dai, tristate);
3539 else
3540 return -EINVAL;
3541 }
3542 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3543
3544 /**
3545 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3546 * @dai: DAI
3547 * @mute: mute enable
3548 * @direction: stream to mute
3549 *
3550 * Mutes the DAI DAC.
3551 */
3552 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
3553 int direction)
3554 {
3555 if (!dai->driver)
3556 return -ENOTSUPP;
3557
3558 if (dai->driver->ops->mute_stream)
3559 return dai->driver->ops->mute_stream(dai, mute, direction);
3560 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
3561 dai->driver->ops->digital_mute)
3562 return dai->driver->ops->digital_mute(dai, mute);
3563 else
3564 return -ENOTSUPP;
3565 }
3566 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3567
3568 /**
3569 * snd_soc_register_card - Register a card with the ASoC core
3570 *
3571 * @card: Card to register
3572 *
3573 */
3574 int snd_soc_register_card(struct snd_soc_card *card)
3575 {
3576 int i, ret;
3577
3578 if (!card->name || !card->dev)
3579 return -EINVAL;
3580
3581 for (i = 0; i < card->num_links; i++) {
3582 struct snd_soc_dai_link *link = &card->dai_link[i];
3583
3584 /*
3585 * Codec must be specified by 1 of name or OF node,
3586 * not both or neither.
3587 */
3588 if (!!link->codec_name == !!link->codec_of_node) {
3589 dev_err(card->dev, "ASoC: Neither/both codec"
3590 " name/of_node are set for %s\n", link->name);
3591 return -EINVAL;
3592 }
3593 /* Codec DAI name must be specified */
3594 if (!link->codec_dai_name) {
3595 dev_err(card->dev, "ASoC: codec_dai_name not"
3596 " set for %s\n", link->name);
3597 return -EINVAL;
3598 }
3599
3600 /*
3601 * Platform may be specified by either name or OF node, but
3602 * can be left unspecified, and a dummy platform will be used.
3603 */
3604 if (link->platform_name && link->platform_of_node) {
3605 dev_err(card->dev, "ASoC: Both platform name/of_node"
3606 " are set for %s\n", link->name);
3607 return -EINVAL;
3608 }
3609
3610 /*
3611 * CPU device may be specified by either name or OF node, but
3612 * can be left unspecified, and will be matched based on DAI
3613 * name alone..
3614 */
3615 if (link->cpu_name && link->cpu_of_node) {
3616 dev_err(card->dev, "ASoC: Neither/both "
3617 "cpu name/of_node are set for %s\n",link->name);
3618 return -EINVAL;
3619 }
3620 /*
3621 * At least one of CPU DAI name or CPU device name/node must be
3622 * specified
3623 */
3624 if (!link->cpu_dai_name &&
3625 !(link->cpu_name || link->cpu_of_node)) {
3626 dev_err(card->dev, "ASoC: Neither cpu_dai_name nor "
3627 "cpu_name/of_node are set for %s\n", link->name);
3628 return -EINVAL;
3629 }
3630 }
3631
3632 dev_set_drvdata(card->dev, card);
3633
3634 snd_soc_initialize_card_lists(card);
3635
3636 soc_init_card_debugfs(card);
3637
3638 card->rtd = devm_kzalloc(card->dev,
3639 sizeof(struct snd_soc_pcm_runtime) *
3640 (card->num_links + card->num_aux_devs),
3641 GFP_KERNEL);
3642 if (card->rtd == NULL)
3643 return -ENOMEM;
3644 card->num_rtd = 0;
3645 card->rtd_aux = &card->rtd[card->num_links];
3646
3647 for (i = 0; i < card->num_links; i++)
3648 card->rtd[i].dai_link = &card->dai_link[i];
3649
3650 INIT_LIST_HEAD(&card->list);
3651 INIT_LIST_HEAD(&card->dapm_dirty);
3652 card->instantiated = 0;
3653 mutex_init(&card->mutex);
3654 mutex_init(&card->dapm_mutex);
3655
3656 ret = snd_soc_instantiate_card(card);
3657 if (ret != 0)
3658 soc_cleanup_card_debugfs(card);
3659
3660 return ret;
3661 }
3662 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3663
3664 /**
3665 * snd_soc_unregister_card - Unregister a card with the ASoC core
3666 *
3667 * @card: Card to unregister
3668 *
3669 */
3670 int snd_soc_unregister_card(struct snd_soc_card *card)
3671 {
3672 if (card->instantiated)
3673 soc_cleanup_card_resources(card);
3674 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3675
3676 return 0;
3677 }
3678 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3679
3680 /*
3681 * Simplify DAI link configuration by removing ".-1" from device names
3682 * and sanitizing names.
3683 */
3684 static char *fmt_single_name(struct device *dev, int *id)
3685 {
3686 char *found, name[NAME_SIZE];
3687 int id1, id2;
3688
3689 if (dev_name(dev) == NULL)
3690 return NULL;
3691
3692 strlcpy(name, dev_name(dev), NAME_SIZE);
3693
3694 /* are we a "%s.%d" name (platform and SPI components) */
3695 found = strstr(name, dev->driver->name);
3696 if (found) {
3697 /* get ID */
3698 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3699
3700 /* discard ID from name if ID == -1 */
3701 if (*id == -1)
3702 found[strlen(dev->driver->name)] = '\0';
3703 }
3704
3705 } else {
3706 /* I2C component devices are named "bus-addr" */
3707 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3708 char tmp[NAME_SIZE];
3709
3710 /* create unique ID number from I2C addr and bus */
3711 *id = ((id1 & 0xffff) << 16) + id2;
3712
3713 /* sanitize component name for DAI link creation */
3714 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3715 strlcpy(name, tmp, NAME_SIZE);
3716 } else
3717 *id = 0;
3718 }
3719
3720 return kstrdup(name, GFP_KERNEL);
3721 }
3722
3723 /*
3724 * Simplify DAI link naming for single devices with multiple DAIs by removing
3725 * any ".-1" and using the DAI name (instead of device name).
3726 */
3727 static inline char *fmt_multiple_name(struct device *dev,
3728 struct snd_soc_dai_driver *dai_drv)
3729 {
3730 if (dai_drv->name == NULL) {
3731 dev_err(dev, "ASoC: error - multiple DAI %s registered with"
3732 " no name\n", dev_name(dev));
3733 return NULL;
3734 }
3735
3736 return kstrdup(dai_drv->name, GFP_KERNEL);
3737 }
3738
3739 /**
3740 * snd_soc_register_dai - Register a DAI with the ASoC core
3741 *
3742 * @dai: DAI to register
3743 */
3744 static int snd_soc_register_dai(struct device *dev,
3745 struct snd_soc_dai_driver *dai_drv)
3746 {
3747 struct snd_soc_codec *codec;
3748 struct snd_soc_dai *dai;
3749
3750 dev_dbg(dev, "ASoC: dai register %s\n", dev_name(dev));
3751
3752 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3753 if (dai == NULL)
3754 return -ENOMEM;
3755
3756 /* create DAI component name */
3757 dai->name = fmt_single_name(dev, &dai->id);
3758 if (dai->name == NULL) {
3759 kfree(dai);
3760 return -ENOMEM;
3761 }
3762
3763 dai->dev = dev;
3764 dai->driver = dai_drv;
3765 dai->dapm.dev = dev;
3766 if (!dai->driver->ops)
3767 dai->driver->ops = &null_dai_ops;
3768
3769 mutex_lock(&client_mutex);
3770
3771 list_for_each_entry(codec, &codec_list, list) {
3772 if (codec->dev == dev) {
3773 dev_dbg(dev, "ASoC: Mapped DAI %s to CODEC %s\n",
3774 dai->name, codec->name);
3775 dai->codec = codec;
3776 break;
3777 }
3778 }
3779
3780 if (!dai->codec)
3781 dai->dapm.idle_bias_off = 1;
3782
3783 list_add(&dai->list, &dai_list);
3784
3785 mutex_unlock(&client_mutex);
3786
3787 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3788
3789 return 0;
3790 }
3791
3792 /**
3793 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3794 *
3795 * @dai: DAI to unregister
3796 */
3797 static void snd_soc_unregister_dai(struct device *dev)
3798 {
3799 struct snd_soc_dai *dai;
3800
3801 list_for_each_entry(dai, &dai_list, list) {
3802 if (dev == dai->dev)
3803 goto found;
3804 }
3805 return;
3806
3807 found:
3808 mutex_lock(&client_mutex);
3809 list_del(&dai->list);
3810 mutex_unlock(&client_mutex);
3811
3812 dev_dbg(dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
3813 kfree(dai->name);
3814 kfree(dai);
3815 }
3816
3817 /**
3818 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3819 *
3820 * @dai: Array of DAIs to register
3821 * @count: Number of DAIs
3822 */
3823 static int snd_soc_register_dais(struct device *dev,
3824 struct snd_soc_dai_driver *dai_drv, size_t count)
3825 {
3826 struct snd_soc_codec *codec;
3827 struct snd_soc_dai *dai;
3828 int i, ret = 0;
3829
3830 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
3831
3832 for (i = 0; i < count; i++) {
3833
3834 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3835 if (dai == NULL) {
3836 ret = -ENOMEM;
3837 goto err;
3838 }
3839
3840 /* create DAI component name */
3841 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3842 if (dai->name == NULL) {
3843 kfree(dai);
3844 ret = -EINVAL;
3845 goto err;
3846 }
3847
3848 dai->dev = dev;
3849 dai->driver = &dai_drv[i];
3850 if (dai->driver->id)
3851 dai->id = dai->driver->id;
3852 else
3853 dai->id = i;
3854 dai->dapm.dev = dev;
3855 if (!dai->driver->ops)
3856 dai->driver->ops = &null_dai_ops;
3857
3858 mutex_lock(&client_mutex);
3859
3860 list_for_each_entry(codec, &codec_list, list) {
3861 if (codec->dev == dev) {
3862 dev_dbg(dev, "ASoC: Mapped DAI %s to "
3863 "CODEC %s\n", dai->name, codec->name);
3864 dai->codec = codec;
3865 break;
3866 }
3867 }
3868
3869 if (!dai->codec)
3870 dai->dapm.idle_bias_off = 1;
3871
3872 list_add(&dai->list, &dai_list);
3873
3874 mutex_unlock(&client_mutex);
3875
3876 dev_dbg(dai->dev, "ASoC: Registered DAI '%s'\n", dai->name);
3877 }
3878
3879 return 0;
3880
3881 err:
3882 for (i--; i >= 0; i--)
3883 snd_soc_unregister_dai(dev);
3884
3885 return ret;
3886 }
3887
3888 /**
3889 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3890 *
3891 * @dai: Array of DAIs to unregister
3892 * @count: Number of DAIs
3893 */
3894 static void snd_soc_unregister_dais(struct device *dev, size_t count)
3895 {
3896 int i;
3897
3898 for (i = 0; i < count; i++)
3899 snd_soc_unregister_dai(dev);
3900 }
3901
3902 /**
3903 * snd_soc_add_platform - Add a platform to the ASoC core
3904 * @dev: The parent device for the platform
3905 * @platform: The platform to add
3906 * @platform_driver: The driver for the platform
3907 */
3908 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3909 const struct snd_soc_platform_driver *platform_drv)
3910 {
3911 /* create platform component name */
3912 platform->name = fmt_single_name(dev, &platform->id);
3913 if (platform->name == NULL) {
3914 kfree(platform);
3915 return -ENOMEM;
3916 }
3917
3918 platform->dev = dev;
3919 platform->driver = platform_drv;
3920 platform->dapm.dev = dev;
3921 platform->dapm.platform = platform;
3922 platform->dapm.stream_event = platform_drv->stream_event;
3923 mutex_init(&platform->mutex);
3924
3925 mutex_lock(&client_mutex);
3926 list_add(&platform->list, &platform_list);
3927 mutex_unlock(&client_mutex);
3928
3929 dev_dbg(dev, "ASoC: Registered platform '%s'\n", platform->name);
3930
3931 return 0;
3932 }
3933 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3934
3935 /**
3936 * snd_soc_register_platform - Register a platform with the ASoC core
3937 *
3938 * @platform: platform to register
3939 */
3940 int snd_soc_register_platform(struct device *dev,
3941 const struct snd_soc_platform_driver *platform_drv)
3942 {
3943 struct snd_soc_platform *platform;
3944 int ret;
3945
3946 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3947
3948 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3949 if (platform == NULL)
3950 return -ENOMEM;
3951
3952 ret = snd_soc_add_platform(dev, platform, platform_drv);
3953 if (ret)
3954 kfree(platform);
3955
3956 return ret;
3957 }
3958 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3959
3960 /**
3961 * snd_soc_remove_platform - Remove a platform from the ASoC core
3962 * @platform: the platform to remove
3963 */
3964 void snd_soc_remove_platform(struct snd_soc_platform *platform)
3965 {
3966 mutex_lock(&client_mutex);
3967 list_del(&platform->list);
3968 mutex_unlock(&client_mutex);
3969
3970 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3971 platform->name);
3972 kfree(platform->name);
3973 }
3974 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3975
3976 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3977 {
3978 struct snd_soc_platform *platform;
3979
3980 list_for_each_entry(platform, &platform_list, list) {
3981 if (dev == platform->dev)
3982 return platform;
3983 }
3984
3985 return NULL;
3986 }
3987 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3988
3989 /**
3990 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3991 *
3992 * @platform: platform to unregister
3993 */
3994 void snd_soc_unregister_platform(struct device *dev)
3995 {
3996 struct snd_soc_platform *platform;
3997
3998 platform = snd_soc_lookup_platform(dev);
3999 if (!platform)
4000 return;
4001
4002 snd_soc_remove_platform(platform);
4003 kfree(platform);
4004 }
4005 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
4006
4007 static u64 codec_format_map[] = {
4008 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
4009 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
4010 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
4011 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
4012 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
4013 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
4014 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4015 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4016 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
4017 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
4018 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
4019 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
4020 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
4021 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
4022 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
4023 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
4024 };
4025
4026 /* Fix up the DAI formats for endianness: codecs don't actually see
4027 * the endianness of the data but we're using the CPU format
4028 * definitions which do need to include endianness so we ensure that
4029 * codec DAIs always have both big and little endian variants set.
4030 */
4031 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
4032 {
4033 int i;
4034
4035 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
4036 if (stream->formats & codec_format_map[i])
4037 stream->formats |= codec_format_map[i];
4038 }
4039
4040 /**
4041 * snd_soc_register_codec - Register a codec with the ASoC core
4042 *
4043 * @codec: codec to register
4044 */
4045 int snd_soc_register_codec(struct device *dev,
4046 const struct snd_soc_codec_driver *codec_drv,
4047 struct snd_soc_dai_driver *dai_drv,
4048 int num_dai)
4049 {
4050 size_t reg_size;
4051 struct snd_soc_codec *codec;
4052 int ret, i;
4053
4054 dev_dbg(dev, "codec register %s\n", dev_name(dev));
4055
4056 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
4057 if (codec == NULL)
4058 return -ENOMEM;
4059
4060 /* create CODEC component name */
4061 codec->name = fmt_single_name(dev, &codec->id);
4062 if (codec->name == NULL) {
4063 ret = -ENOMEM;
4064 goto fail_codec;
4065 }
4066
4067 if (codec_drv->compress_type)
4068 codec->compress_type = codec_drv->compress_type;
4069 else
4070 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
4071
4072 codec->write = codec_drv->write;
4073 codec->read = codec_drv->read;
4074 codec->volatile_register = codec_drv->volatile_register;
4075 codec->readable_register = codec_drv->readable_register;
4076 codec->writable_register = codec_drv->writable_register;
4077 codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
4078 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
4079 codec->dapm.dev = dev;
4080 codec->dapm.codec = codec;
4081 codec->dapm.seq_notifier = codec_drv->seq_notifier;
4082 codec->dapm.stream_event = codec_drv->stream_event;
4083 codec->dev = dev;
4084 codec->driver = codec_drv;
4085 codec->num_dai = num_dai;
4086 mutex_init(&codec->mutex);
4087
4088 /* allocate CODEC register cache */
4089 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
4090 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
4091 codec->reg_size = reg_size;
4092 /* it is necessary to make a copy of the default register cache
4093 * because in the case of using a compression type that requires
4094 * the default register cache to be marked as the
4095 * kernel might have freed the array by the time we initialize
4096 * the cache.
4097 */
4098 if (codec_drv->reg_cache_default) {
4099 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
4100 reg_size, GFP_KERNEL);
4101 if (!codec->reg_def_copy) {
4102 ret = -ENOMEM;
4103 goto fail_codec_name;
4104 }
4105 }
4106 }
4107
4108 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
4109 if (!codec->volatile_register)
4110 codec->volatile_register = snd_soc_default_volatile_register;
4111 if (!codec->readable_register)
4112 codec->readable_register = snd_soc_default_readable_register;
4113 if (!codec->writable_register)
4114 codec->writable_register = snd_soc_default_writable_register;
4115 }
4116
4117 for (i = 0; i < num_dai; i++) {
4118 fixup_codec_formats(&dai_drv[i].playback);
4119 fixup_codec_formats(&dai_drv[i].capture);
4120 }
4121
4122 mutex_lock(&client_mutex);
4123 list_add(&codec->list, &codec_list);
4124 mutex_unlock(&client_mutex);
4125
4126 /* register any DAIs */
4127 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4128 if (ret < 0) {
4129 dev_err(codec->dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4130 goto fail_codec_name;
4131 }
4132
4133 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", codec->name);
4134 return 0;
4135
4136 fail_codec_name:
4137 mutex_lock(&client_mutex);
4138 list_del(&codec->list);
4139 mutex_unlock(&client_mutex);
4140
4141 kfree(codec->name);
4142 fail_codec:
4143 kfree(codec);
4144 return ret;
4145 }
4146 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4147
4148 /**
4149 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4150 *
4151 * @codec: codec to unregister
4152 */
4153 void snd_soc_unregister_codec(struct device *dev)
4154 {
4155 struct snd_soc_codec *codec;
4156
4157 list_for_each_entry(codec, &codec_list, list) {
4158 if (dev == codec->dev)
4159 goto found;
4160 }
4161 return;
4162
4163 found:
4164 snd_soc_unregister_dais(dev, codec->num_dai);
4165
4166 mutex_lock(&client_mutex);
4167 list_del(&codec->list);
4168 mutex_unlock(&client_mutex);
4169
4170 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
4171
4172 snd_soc_cache_exit(codec);
4173 kfree(codec->reg_def_copy);
4174 kfree(codec->name);
4175 kfree(codec);
4176 }
4177 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4178
4179
4180 /**
4181 * snd_soc_register_component - Register a component with the ASoC core
4182 *
4183 */
4184 int snd_soc_register_component(struct device *dev,
4185 const struct snd_soc_component_driver *cmpnt_drv,
4186 struct snd_soc_dai_driver *dai_drv,
4187 int num_dai)
4188 {
4189 struct snd_soc_component *cmpnt;
4190 int ret;
4191
4192 dev_dbg(dev, "component register %s\n", dev_name(dev));
4193
4194 cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
4195 if (!cmpnt) {
4196 dev_err(dev, "ASoC: Failed to allocate memory\n");
4197 return -ENOMEM;
4198 }
4199
4200 cmpnt->name = fmt_single_name(dev, &cmpnt->id);
4201 if (!cmpnt->name) {
4202 dev_err(dev, "ASoC: Failed to simplifying name\n");
4203 return -ENOMEM;
4204 }
4205
4206 cmpnt->dev = dev;
4207 cmpnt->driver = cmpnt_drv;
4208 cmpnt->num_dai = num_dai;
4209
4210 /*
4211 * snd_soc_register_dai() uses fmt_single_name(), and
4212 * snd_soc_register_dais() uses fmt_multiple_name()
4213 * for dai->name which is used for name based matching
4214 */
4215 if (1 == num_dai)
4216 ret = snd_soc_register_dai(dev, dai_drv);
4217 else
4218 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4219 if (ret < 0) {
4220 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4221 goto error_component_name;
4222 }
4223
4224 mutex_lock(&client_mutex);
4225 list_add(&cmpnt->list, &component_list);
4226 mutex_unlock(&client_mutex);
4227
4228 dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);
4229
4230 return ret;
4231
4232 error_component_name:
4233 kfree(cmpnt->name);
4234
4235 return ret;
4236 }
4237 EXPORT_SYMBOL_GPL(snd_soc_register_component);
4238
4239 /**
4240 * snd_soc_unregister_component - Unregister a component from the ASoC core
4241 *
4242 */
4243 void snd_soc_unregister_component(struct device *dev)
4244 {
4245 struct snd_soc_component *cmpnt;
4246
4247 list_for_each_entry(cmpnt, &component_list, list) {
4248 if (dev == cmpnt->dev)
4249 goto found;
4250 }
4251 return;
4252
4253 found:
4254 snd_soc_unregister_dais(dev, cmpnt->num_dai);
4255
4256 mutex_lock(&client_mutex);
4257 list_del(&cmpnt->list);
4258 mutex_unlock(&client_mutex);
4259
4260 dev_dbg(dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
4261 kfree(cmpnt->name);
4262 }
4263 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
4264
4265 /* Retrieve a card's name from device tree */
4266 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4267 const char *propname)
4268 {
4269 struct device_node *np = card->dev->of_node;
4270 int ret;
4271
4272 ret = of_property_read_string_index(np, propname, 0, &card->name);
4273 /*
4274 * EINVAL means the property does not exist. This is fine providing
4275 * card->name was previously set, which is checked later in
4276 * snd_soc_register_card.
4277 */
4278 if (ret < 0 && ret != -EINVAL) {
4279 dev_err(card->dev,
4280 "ASoC: Property '%s' could not be read: %d\n",
4281 propname, ret);
4282 return ret;
4283 }
4284
4285 return 0;
4286 }
4287 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4288
4289 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4290 const char *propname)
4291 {
4292 struct device_node *np = card->dev->of_node;
4293 int num_routes;
4294 struct snd_soc_dapm_route *routes;
4295 int i, ret;
4296
4297 num_routes = of_property_count_strings(np, propname);
4298 if (num_routes < 0 || num_routes & 1) {
4299 dev_err(card->dev, "ASoC: Property '%s' does not exist or its"
4300 " length is not even\n", propname);
4301 return -EINVAL;
4302 }
4303 num_routes /= 2;
4304 if (!num_routes) {
4305 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4306 propname);
4307 return -EINVAL;
4308 }
4309
4310 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4311 GFP_KERNEL);
4312 if (!routes) {
4313 dev_err(card->dev,
4314 "ASoC: Could not allocate DAPM route table\n");
4315 return -EINVAL;
4316 }
4317
4318 for (i = 0; i < num_routes; i++) {
4319 ret = of_property_read_string_index(np, propname,
4320 2 * i, &routes[i].sink);
4321 if (ret) {
4322 dev_err(card->dev,
4323 "ASoC: Property '%s' index %d could not be read: %d\n",
4324 propname, 2 * i, ret);
4325 return -EINVAL;
4326 }
4327 ret = of_property_read_string_index(np, propname,
4328 (2 * i) + 1, &routes[i].source);
4329 if (ret) {
4330 dev_err(card->dev,
4331 "ASoC: Property '%s' index %d could not be read: %d\n",
4332 propname, (2 * i) + 1, ret);
4333 return -EINVAL;
4334 }
4335 }
4336
4337 card->num_dapm_routes = num_routes;
4338 card->dapm_routes = routes;
4339
4340 return 0;
4341 }
4342 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4343
4344 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4345 const char *prefix)
4346 {
4347 int ret, i;
4348 char prop[128];
4349 unsigned int format = 0;
4350 int bit, frame;
4351 const char *str;
4352 struct {
4353 char *name;
4354 unsigned int val;
4355 } of_fmt_table[] = {
4356 { "i2s", SND_SOC_DAIFMT_I2S },
4357 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
4358 { "left_j", SND_SOC_DAIFMT_LEFT_J },
4359 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
4360 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
4361 { "ac97", SND_SOC_DAIFMT_AC97 },
4362 { "pdm", SND_SOC_DAIFMT_PDM},
4363 { "msb", SND_SOC_DAIFMT_MSB },
4364 { "lsb", SND_SOC_DAIFMT_LSB },
4365 };
4366
4367 if (!prefix)
4368 prefix = "";
4369
4370 /*
4371 * check "[prefix]format = xxx"
4372 * SND_SOC_DAIFMT_FORMAT_MASK area
4373 */
4374 snprintf(prop, sizeof(prop), "%sformat", prefix);
4375 ret = of_property_read_string(np, prop, &str);
4376 if (ret == 0) {
4377 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4378 if (strcmp(str, of_fmt_table[i].name) == 0) {
4379 format |= of_fmt_table[i].val;
4380 break;
4381 }
4382 }
4383 }
4384
4385 /*
4386 * check "[prefix]continuous-clock"
4387 * SND_SOC_DAIFMT_CLOCK_MASK area
4388 */
4389 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4390 if (of_get_property(np, prop, NULL))
4391 format |= SND_SOC_DAIFMT_CONT;
4392 else
4393 format |= SND_SOC_DAIFMT_GATED;
4394
4395 /*
4396 * check "[prefix]bitclock-inversion"
4397 * check "[prefix]frame-inversion"
4398 * SND_SOC_DAIFMT_INV_MASK area
4399 */
4400 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4401 bit = !!of_get_property(np, prop, NULL);
4402
4403 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4404 frame = !!of_get_property(np, prop, NULL);
4405
4406 switch ((bit << 4) + frame) {
4407 case 0x11:
4408 format |= SND_SOC_DAIFMT_IB_IF;
4409 break;
4410 case 0x10:
4411 format |= SND_SOC_DAIFMT_IB_NF;
4412 break;
4413 case 0x01:
4414 format |= SND_SOC_DAIFMT_NB_IF;
4415 break;
4416 default:
4417 /* SND_SOC_DAIFMT_NB_NF is default */
4418 break;
4419 }
4420
4421 /*
4422 * check "[prefix]bitclock-master"
4423 * check "[prefix]frame-master"
4424 * SND_SOC_DAIFMT_MASTER_MASK area
4425 */
4426 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4427 bit = !!of_get_property(np, prop, NULL);
4428
4429 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4430 frame = !!of_get_property(np, prop, NULL);
4431
4432 switch ((bit << 4) + frame) {
4433 case 0x11:
4434 format |= SND_SOC_DAIFMT_CBM_CFM;
4435 break;
4436 case 0x10:
4437 format |= SND_SOC_DAIFMT_CBM_CFS;
4438 break;
4439 case 0x01:
4440 format |= SND_SOC_DAIFMT_CBS_CFM;
4441 break;
4442 default:
4443 format |= SND_SOC_DAIFMT_CBS_CFS;
4444 break;
4445 }
4446
4447 return format;
4448 }
4449 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4450
4451 static int __init snd_soc_init(void)
4452 {
4453 #ifdef CONFIG_DEBUG_FS
4454 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4455 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4456 pr_warn("ASoC: Failed to create debugfs directory\n");
4457 snd_soc_debugfs_root = NULL;
4458 }
4459
4460 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4461 &codec_list_fops))
4462 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4463
4464 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4465 &dai_list_fops))
4466 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4467
4468 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4469 &platform_list_fops))
4470 pr_warn("ASoC: Failed to create platform list debugfs file\n");
4471 #endif
4472
4473 snd_soc_util_init();
4474
4475 return platform_driver_register(&soc_driver);
4476 }
4477 module_init(snd_soc_init);
4478
4479 static void __exit snd_soc_exit(void)
4480 {
4481 snd_soc_util_exit();
4482
4483 #ifdef CONFIG_DEBUG_FS
4484 debugfs_remove_recursive(snd_soc_debugfs_root);
4485 #endif
4486 platform_driver_unregister(&soc_driver);
4487 }
4488 module_exit(snd_soc_exit);
4489
4490 /* Module information */
4491 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4492 MODULE_DESCRIPTION("ALSA SoC Core");
4493 MODULE_LICENSE("GPL");
4494 MODULE_ALIAS("platform:soc-audio");
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