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x86, cpufeature: If we disable CLFLUSH, we should disable CLFLUSHOPT
[linux/fpc-iii.git] / sound / soc / soc-core.c
blobfe1df50805a3035ea455d40771c55d4cb4f6585d
1 /*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
36 #include <linux/of.h>
37 #include <linux/gpio.h>
38 #include <linux/of_gpio.h>
39 #include <sound/ac97_codec.h>
40 #include <sound/core.h>
41 #include <sound/jack.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc.h>
45 #include <sound/soc-dpcm.h>
46 #include <sound/initval.h>
47
48 #define CREATE_TRACE_POINTS
49 #include <trace/events/asoc.h>
50
51 #define NAME_SIZE 32
52
53 #ifdef CONFIG_DEBUG_FS
54 struct dentry *snd_soc_debugfs_root;
55 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
56 #endif
57
58 static DEFINE_MUTEX(client_mutex);
59 static LIST_HEAD(dai_list);
60 static LIST_HEAD(platform_list);
61 static LIST_HEAD(codec_list);
62 static LIST_HEAD(component_list);
63
64 /*
65 * This is a timeout to do a DAPM powerdown after a stream is closed().
66 * It can be used to eliminate pops between different playback streams, e.g.
67 * between two audio tracks.
68 */
69 static int pmdown_time = 5000;
70 module_param(pmdown_time, int, 0);
71 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
72
73 struct snd_ac97_reset_cfg {
74 struct pinctrl *pctl;
75 struct pinctrl_state *pstate_reset;
76 struct pinctrl_state *pstate_warm_reset;
77 struct pinctrl_state *pstate_run;
78 int gpio_sdata;
79 int gpio_sync;
80 int gpio_reset;
81 };
82
83 /* returns the minimum number of bytes needed to represent
84 * a particular given value */
85 static int min_bytes_needed(unsigned long val)
86 {
87 int c = 0;
88 int i;
89
90 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
91 if (val & (1UL << i))
92 break;
93 c = (sizeof val * 8) - c;
94 if (!c || (c % 8))
95 c = (c + 8) / 8;
96 else
97 c /= 8;
98 return c;
99 }
100
101 /* fill buf which is 'len' bytes with a formatted
102 * string of the form 'reg: value\n' */
103 static int format_register_str(struct snd_soc_codec *codec,
104 unsigned int reg, char *buf, size_t len)
105 {
106 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
107 int regsize = codec->driver->reg_word_size * 2;
108 int ret;
109 char tmpbuf[len + 1];
110 char regbuf[regsize + 1];
111
112 /* since tmpbuf is allocated on the stack, warn the callers if they
113 * try to abuse this function */
114 WARN_ON(len > 63);
115
116 /* +2 for ': ' and + 1 for '\n' */
117 if (wordsize + regsize + 2 + 1 != len)
118 return -EINVAL;
119
120 ret = snd_soc_read(codec, reg);
121 if (ret < 0) {
122 memset(regbuf, 'X', regsize);
123 regbuf[regsize] = '\0';
124 } else {
125 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
126 }
127
128 /* prepare the buffer */
129 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
130 /* copy it back to the caller without the '\0' */
131 memcpy(buf, tmpbuf, len);
132
133 return 0;
134 }
135
136 /* codec register dump */
137 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
138 size_t count, loff_t pos)
139 {
140 int i, step = 1;
141 int wordsize, regsize;
142 int len;
143 size_t total = 0;
144 loff_t p = 0;
145
146 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
147 regsize = codec->driver->reg_word_size * 2;
148
149 len = wordsize + regsize + 2 + 1;
150
151 if (!codec->driver->reg_cache_size)
152 return 0;
153
154 if (codec->driver->reg_cache_step)
155 step = codec->driver->reg_cache_step;
156
157 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
158 if (!snd_soc_codec_readable_register(codec, i))
159 continue;
160 if (codec->driver->display_register) {
161 count += codec->driver->display_register(codec, buf + count,
162 PAGE_SIZE - count, i);
163 } else {
164 /* only support larger than PAGE_SIZE bytes debugfs
165 * entries for the default case */
166 if (p >= pos) {
167 if (total + len >= count - 1)
168 break;
169 format_register_str(codec, i, buf + total, len);
170 total += len;
171 }
172 p += len;
173 }
174 }
175
176 total = min(total, count - 1);
177
178 return total;
179 }
180
181 static ssize_t codec_reg_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
183 {
184 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
185
186 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
187 }
188
189 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
190
191 static ssize_t pmdown_time_show(struct device *dev,
192 struct device_attribute *attr, char *buf)
193 {
194 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
195
196 return sprintf(buf, "%ld\n", rtd->pmdown_time);
197 }
198
199 static ssize_t pmdown_time_set(struct device *dev,
200 struct device_attribute *attr,
201 const char *buf, size_t count)
202 {
203 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
204 int ret;
205
206 ret = kstrtol(buf, 10, &rtd->pmdown_time);
207 if (ret)
208 return ret;
209
210 return count;
211 }
212
213 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
214
215 #ifdef CONFIG_DEBUG_FS
216 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
217 size_t count, loff_t *ppos)
218 {
219 ssize_t ret;
220 struct snd_soc_codec *codec = file->private_data;
221 char *buf;
222
223 if (*ppos < 0 || !count)
224 return -EINVAL;
225
226 buf = kmalloc(count, GFP_KERNEL);
227 if (!buf)
228 return -ENOMEM;
229
230 ret = soc_codec_reg_show(codec, buf, count, *ppos);
231 if (ret >= 0) {
232 if (copy_to_user(user_buf, buf, ret)) {
233 kfree(buf);
234 return -EFAULT;
235 }
236 *ppos += ret;
237 }
238
239 kfree(buf);
240 return ret;
241 }
242
243 static ssize_t codec_reg_write_file(struct file *file,
244 const char __user *user_buf, size_t count, loff_t *ppos)
245 {
246 char buf[32];
247 size_t buf_size;
248 char *start = buf;
249 unsigned long reg, value;
250 struct snd_soc_codec *codec = file->private_data;
251 int ret;
252
253 buf_size = min(count, (sizeof(buf)-1));
254 if (copy_from_user(buf, user_buf, buf_size))
255 return -EFAULT;
256 buf[buf_size] = 0;
257
258 while (*start == ' ')
259 start++;
260 reg = simple_strtoul(start, &start, 16);
261 while (*start == ' ')
262 start++;
263 ret = kstrtoul(start, 16, &value);
264 if (ret)
265 return ret;
266
267 /* Userspace has been fiddling around behind the kernel's back */
268 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
269
270 snd_soc_write(codec, reg, value);
271 return buf_size;
272 }
273
274 static const struct file_operations codec_reg_fops = {
275 .open = simple_open,
276 .read = codec_reg_read_file,
277 .write = codec_reg_write_file,
278 .llseek = default_llseek,
279 };
280
281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282 {
283 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284
285 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286 debugfs_card_root);
287 if (!codec->debugfs_codec_root) {
288 dev_warn(codec->dev,
289 "ASoC: Failed to create codec debugfs directory\n");
290 return;
291 }
292
293 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294 &codec->cache_sync);
295 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
296 &codec->cache_only);
297
298 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299 codec->debugfs_codec_root,
300 codec, &codec_reg_fops);
301 if (!codec->debugfs_reg)
302 dev_warn(codec->dev,
303 "ASoC: Failed to create codec register debugfs file\n");
304
305 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
306 }
307
308 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309 {
310 debugfs_remove_recursive(codec->debugfs_codec_root);
311 }
312
313 static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
314 {
315 struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
316
317 platform->debugfs_platform_root = debugfs_create_dir(platform->name,
318 debugfs_card_root);
319 if (!platform->debugfs_platform_root) {
320 dev_warn(platform->dev,
321 "ASoC: Failed to create platform debugfs directory\n");
322 return;
323 }
324
325 snd_soc_dapm_debugfs_init(&platform->dapm,
326 platform->debugfs_platform_root);
327 }
328
329 static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
330 {
331 debugfs_remove_recursive(platform->debugfs_platform_root);
332 }
333
334 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
335 size_t count, loff_t *ppos)
336 {
337 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
338 ssize_t len, ret = 0;
339 struct snd_soc_codec *codec;
340
341 if (!buf)
342 return -ENOMEM;
343
344 list_for_each_entry(codec, &codec_list, list) {
345 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
346 codec->name);
347 if (len >= 0)
348 ret += len;
349 if (ret > PAGE_SIZE) {
350 ret = PAGE_SIZE;
351 break;
352 }
353 }
354
355 if (ret >= 0)
356 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
357
358 kfree(buf);
359
360 return ret;
361 }
362
363 static const struct file_operations codec_list_fops = {
364 .read = codec_list_read_file,
365 .llseek = default_llseek,/* read accesses f_pos */
366 };
367
368 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
369 size_t count, loff_t *ppos)
370 {
371 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
372 ssize_t len, ret = 0;
373 struct snd_soc_dai *dai;
374
375 if (!buf)
376 return -ENOMEM;
377
378 list_for_each_entry(dai, &dai_list, list) {
379 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
380 if (len >= 0)
381 ret += len;
382 if (ret > PAGE_SIZE) {
383 ret = PAGE_SIZE;
384 break;
385 }
386 }
387
388 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
389
390 kfree(buf);
391
392 return ret;
393 }
394
395 static const struct file_operations dai_list_fops = {
396 .read = dai_list_read_file,
397 .llseek = default_llseek,/* read accesses f_pos */
398 };
399
400 static ssize_t platform_list_read_file(struct file *file,
401 char __user *user_buf,
402 size_t count, loff_t *ppos)
403 {
404 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
405 ssize_t len, ret = 0;
406 struct snd_soc_platform *platform;
407
408 if (!buf)
409 return -ENOMEM;
410
411 list_for_each_entry(platform, &platform_list, list) {
412 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
413 platform->name);
414 if (len >= 0)
415 ret += len;
416 if (ret > PAGE_SIZE) {
417 ret = PAGE_SIZE;
418 break;
419 }
420 }
421
422 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
423
424 kfree(buf);
425
426 return ret;
427 }
428
429 static const struct file_operations platform_list_fops = {
430 .read = platform_list_read_file,
431 .llseek = default_llseek,/* read accesses f_pos */
432 };
433
434 static void soc_init_card_debugfs(struct snd_soc_card *card)
435 {
436 card->debugfs_card_root = debugfs_create_dir(card->name,
437 snd_soc_debugfs_root);
438 if (!card->debugfs_card_root) {
439 dev_warn(card->dev,
440 "ASoC: Failed to create card debugfs directory\n");
441 return;
442 }
443
444 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
445 card->debugfs_card_root,
446 &card->pop_time);
447 if (!card->debugfs_pop_time)
448 dev_warn(card->dev,
449 "ASoC: Failed to create pop time debugfs file\n");
450 }
451
452 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
453 {
454 debugfs_remove_recursive(card->debugfs_card_root);
455 }
456
457 #else
458
459 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
460 {
461 }
462
463 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
464 {
465 }
466
467 static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
468 {
469 }
470
471 static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
472 {
473 }
474
475 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
476 {
477 }
478
479 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
480 {
481 }
482 #endif
483
484 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
485 const char *dai_link, int stream)
486 {
487 int i;
488
489 for (i = 0; i < card->num_links; i++) {
490 if (card->rtd[i].dai_link->no_pcm &&
491 !strcmp(card->rtd[i].dai_link->name, dai_link))
492 return card->rtd[i].pcm->streams[stream].substream;
493 }
494 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
495 return NULL;
496 }
497 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
498
499 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
500 const char *dai_link)
501 {
502 int i;
503
504 for (i = 0; i < card->num_links; i++) {
505 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
506 return &card->rtd[i];
507 }
508 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
509 return NULL;
510 }
511 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
512
513 #ifdef CONFIG_SND_SOC_AC97_BUS
514 /* unregister ac97 codec */
515 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
516 {
517 if (codec->ac97->dev.bus)
518 device_unregister(&codec->ac97->dev);
519 return 0;
520 }
521
522 /* stop no dev release warning */
523 static void soc_ac97_device_release(struct device *dev){}
524
525 /* register ac97 codec to bus */
526 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
527 {
528 int err;
529
530 codec->ac97->dev.bus = &ac97_bus_type;
531 codec->ac97->dev.parent = codec->card->dev;
532 codec->ac97->dev.release = soc_ac97_device_release;
533
534 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
535 codec->card->snd_card->number, 0, codec->name);
536 err = device_register(&codec->ac97->dev);
537 if (err < 0) {
538 dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");
539 codec->ac97->dev.bus = NULL;
540 return err;
541 }
542 return 0;
543 }
544 #endif
545
546 static void codec2codec_close_delayed_work(struct work_struct *work)
547 {
548 /* Currently nothing to do for c2c links
549 * Since c2c links are internal nodes in the DAPM graph and
550 * don't interface with the outside world or application layer
551 * we don't have to do any special handling on close.
552 */
553 }
554
555 #ifdef CONFIG_PM_SLEEP
556 /* powers down audio subsystem for suspend */
557 int snd_soc_suspend(struct device *dev)
558 {
559 struct snd_soc_card *card = dev_get_drvdata(dev);
560 struct snd_soc_codec *codec;
561 int i;
562
563 /* If the initialization of this soc device failed, there is no codec
564 * associated with it. Just bail out in this case.
565 */
566 if (list_empty(&card->codec_dev_list))
567 return 0;
568
569 /* Due to the resume being scheduled into a workqueue we could
570 * suspend before that's finished - wait for it to complete.
571 */
572 snd_power_lock(card->snd_card);
573 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
574 snd_power_unlock(card->snd_card);
575
576 /* we're going to block userspace touching us until resume completes */
577 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
578
579 /* mute any active DACs */
580 for (i = 0; i < card->num_rtd; i++) {
581 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
582 struct snd_soc_dai_driver *drv = dai->driver;
583
584 if (card->rtd[i].dai_link->ignore_suspend)
585 continue;
586
587 if (drv->ops->digital_mute && dai->playback_active)
588 drv->ops->digital_mute(dai, 1);
589 }
590
591 /* suspend all pcms */
592 for (i = 0; i < card->num_rtd; i++) {
593 if (card->rtd[i].dai_link->ignore_suspend)
594 continue;
595
596 snd_pcm_suspend_all(card->rtd[i].pcm);
597 }
598
599 if (card->suspend_pre)
600 card->suspend_pre(card);
601
602 for (i = 0; i < card->num_rtd; i++) {
603 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
604 struct snd_soc_platform *platform = card->rtd[i].platform;
605
606 if (card->rtd[i].dai_link->ignore_suspend)
607 continue;
608
609 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
610 cpu_dai->driver->suspend(cpu_dai);
611 if (platform->driver->suspend && !platform->suspended) {
612 platform->driver->suspend(cpu_dai);
613 platform->suspended = 1;
614 }
615 }
616
617 /* close any waiting streams and save state */
618 for (i = 0; i < card->num_rtd; i++) {
619 flush_delayed_work(&card->rtd[i].delayed_work);
620 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
621 }
622
623 for (i = 0; i < card->num_rtd; i++) {
624
625 if (card->rtd[i].dai_link->ignore_suspend)
626 continue;
627
628 snd_soc_dapm_stream_event(&card->rtd[i],
629 SNDRV_PCM_STREAM_PLAYBACK,
630 SND_SOC_DAPM_STREAM_SUSPEND);
631
632 snd_soc_dapm_stream_event(&card->rtd[i],
633 SNDRV_PCM_STREAM_CAPTURE,
634 SND_SOC_DAPM_STREAM_SUSPEND);
635 }
636
637 /* Recheck all analogue paths too */
638 dapm_mark_io_dirty(&card->dapm);
639 snd_soc_dapm_sync(&card->dapm);
640
641 /* suspend all CODECs */
642 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
643 /* If there are paths active then the CODEC will be held with
644 * bias _ON and should not be suspended. */
645 if (!codec->suspended && codec->driver->suspend) {
646 switch (codec->dapm.bias_level) {
647 case SND_SOC_BIAS_STANDBY:
648 /*
649 * If the CODEC is capable of idle
650 * bias off then being in STANDBY
651 * means it's doing something,
652 * otherwise fall through.
653 */
654 if (codec->dapm.idle_bias_off) {
655 dev_dbg(codec->dev,
656 "ASoC: idle_bias_off CODEC on over suspend\n");
657 break;
658 }
659 case SND_SOC_BIAS_OFF:
660 codec->driver->suspend(codec);
661 codec->suspended = 1;
662 codec->cache_sync = 1;
663 if (codec->using_regmap)
664 regcache_mark_dirty(codec->control_data);
665 /* deactivate pins to sleep state */
666 pinctrl_pm_select_sleep_state(codec->dev);
667 break;
668 default:
669 dev_dbg(codec->dev,
670 "ASoC: CODEC is on over suspend\n");
671 break;
672 }
673 }
674 }
675
676 for (i = 0; i < card->num_rtd; i++) {
677 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
678
679 if (card->rtd[i].dai_link->ignore_suspend)
680 continue;
681
682 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
683 cpu_dai->driver->suspend(cpu_dai);
684
685 /* deactivate pins to sleep state */
686 pinctrl_pm_select_sleep_state(cpu_dai->dev);
687 }
688
689 if (card->suspend_post)
690 card->suspend_post(card);
691
692 return 0;
693 }
694 EXPORT_SYMBOL_GPL(snd_soc_suspend);
695
696 /* deferred resume work, so resume can complete before we finished
697 * setting our codec back up, which can be very slow on I2C
698 */
699 static void soc_resume_deferred(struct work_struct *work)
700 {
701 struct snd_soc_card *card =
702 container_of(work, struct snd_soc_card, deferred_resume_work);
703 struct snd_soc_codec *codec;
704 int i;
705
706 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
707 * so userspace apps are blocked from touching us
708 */
709
710 dev_dbg(card->dev, "ASoC: starting resume work\n");
711
712 /* Bring us up into D2 so that DAPM starts enabling things */
713 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
714
715 if (card->resume_pre)
716 card->resume_pre(card);
717
718 /* resume AC97 DAIs */
719 for (i = 0; i < card->num_rtd; i++) {
720 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
721
722 if (card->rtd[i].dai_link->ignore_suspend)
723 continue;
724
725 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
726 cpu_dai->driver->resume(cpu_dai);
727 }
728
729 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
730 /* If the CODEC was idle over suspend then it will have been
731 * left with bias OFF or STANDBY and suspended so we must now
732 * resume. Otherwise the suspend was suppressed.
733 */
734 if (codec->driver->resume && codec->suspended) {
735 switch (codec->dapm.bias_level) {
736 case SND_SOC_BIAS_STANDBY:
737 case SND_SOC_BIAS_OFF:
738 codec->driver->resume(codec);
739 codec->suspended = 0;
740 break;
741 default:
742 dev_dbg(codec->dev,
743 "ASoC: CODEC was on over suspend\n");
744 break;
745 }
746 }
747 }
748
749 for (i = 0; i < card->num_rtd; i++) {
750
751 if (card->rtd[i].dai_link->ignore_suspend)
752 continue;
753
754 snd_soc_dapm_stream_event(&card->rtd[i],
755 SNDRV_PCM_STREAM_PLAYBACK,
756 SND_SOC_DAPM_STREAM_RESUME);
757
758 snd_soc_dapm_stream_event(&card->rtd[i],
759 SNDRV_PCM_STREAM_CAPTURE,
760 SND_SOC_DAPM_STREAM_RESUME);
761 }
762
763 /* unmute any active DACs */
764 for (i = 0; i < card->num_rtd; i++) {
765 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
766 struct snd_soc_dai_driver *drv = dai->driver;
767
768 if (card->rtd[i].dai_link->ignore_suspend)
769 continue;
770
771 if (drv->ops->digital_mute && dai->playback_active)
772 drv->ops->digital_mute(dai, 0);
773 }
774
775 for (i = 0; i < card->num_rtd; i++) {
776 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
777 struct snd_soc_platform *platform = card->rtd[i].platform;
778
779 if (card->rtd[i].dai_link->ignore_suspend)
780 continue;
781
782 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
783 cpu_dai->driver->resume(cpu_dai);
784 if (platform->driver->resume && platform->suspended) {
785 platform->driver->resume(cpu_dai);
786 platform->suspended = 0;
787 }
788 }
789
790 if (card->resume_post)
791 card->resume_post(card);
792
793 dev_dbg(card->dev, "ASoC: resume work completed\n");
794
795 /* userspace can access us now we are back as we were before */
796 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
797
798 /* Recheck all analogue paths too */
799 dapm_mark_io_dirty(&card->dapm);
800 snd_soc_dapm_sync(&card->dapm);
801 }
802
803 /* powers up audio subsystem after a suspend */
804 int snd_soc_resume(struct device *dev)
805 {
806 struct snd_soc_card *card = dev_get_drvdata(dev);
807 int i, ac97_control = 0;
808
809 /* If the initialization of this soc device failed, there is no codec
810 * associated with it. Just bail out in this case.
811 */
812 if (list_empty(&card->codec_dev_list))
813 return 0;
814
815 /* activate pins from sleep state */
816 for (i = 0; i < card->num_rtd; i++) {
817 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
818 struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
819 if (cpu_dai->active)
820 pinctrl_pm_select_default_state(cpu_dai->dev);
821 if (codec_dai->active)
822 pinctrl_pm_select_default_state(codec_dai->dev);
823 }
824
825 /* AC97 devices might have other drivers hanging off them so
826 * need to resume immediately. Other drivers don't have that
827 * problem and may take a substantial amount of time to resume
828 * due to I/O costs and anti-pop so handle them out of line.
829 */
830 for (i = 0; i < card->num_rtd; i++) {
831 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
832 ac97_control |= cpu_dai->driver->ac97_control;
833 }
834 if (ac97_control) {
835 dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
836 soc_resume_deferred(&card->deferred_resume_work);
837 } else {
838 dev_dbg(dev, "ASoC: Scheduling resume work\n");
839 if (!schedule_work(&card->deferred_resume_work))
840 dev_err(dev, "ASoC: resume work item may be lost\n");
841 }
842
843 return 0;
844 }
845 EXPORT_SYMBOL_GPL(snd_soc_resume);
846 #else
847 #define snd_soc_suspend NULL
848 #define snd_soc_resume NULL
849 #endif
850
851 static const struct snd_soc_dai_ops null_dai_ops = {
852 };
853
854 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
855 {
856 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
857 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
858 struct snd_soc_codec *codec;
859 struct snd_soc_platform *platform;
860 struct snd_soc_dai *codec_dai, *cpu_dai;
861 const char *platform_name;
862
863 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
864
865 /* Find CPU DAI from registered DAIs*/
866 list_for_each_entry(cpu_dai, &dai_list, list) {
867 if (dai_link->cpu_of_node &&
868 (cpu_dai->dev->of_node != dai_link->cpu_of_node))
869 continue;
870 if (dai_link->cpu_name &&
871 strcmp(dev_name(cpu_dai->dev), dai_link->cpu_name))
872 continue;
873 if (dai_link->cpu_dai_name &&
874 strcmp(cpu_dai->name, dai_link->cpu_dai_name))
875 continue;
876
877 rtd->cpu_dai = cpu_dai;
878 }
879
880 if (!rtd->cpu_dai) {
881 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
882 dai_link->cpu_dai_name);
883 return -EPROBE_DEFER;
884 }
885
886 /* Find CODEC from registered CODECs */
887 list_for_each_entry(codec, &codec_list, list) {
888 if (dai_link->codec_of_node) {
889 if (codec->dev->of_node != dai_link->codec_of_node)
890 continue;
891 } else {
892 if (strcmp(codec->name, dai_link->codec_name))
893 continue;
894 }
895
896 rtd->codec = codec;
897
898 /*
899 * CODEC found, so find CODEC DAI from registered DAIs from
900 * this CODEC
901 */
902 list_for_each_entry(codec_dai, &dai_list, list) {
903 if (codec->dev == codec_dai->dev &&
904 !strcmp(codec_dai->name,
905 dai_link->codec_dai_name)) {
906
907 rtd->codec_dai = codec_dai;
908 }
909 }
910
911 if (!rtd->codec_dai) {
912 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
913 dai_link->codec_dai_name);
914 return -EPROBE_DEFER;
915 }
916 }
917
918 if (!rtd->codec) {
919 dev_err(card->dev, "ASoC: CODEC %s not registered\n",
920 dai_link->codec_name);
921 return -EPROBE_DEFER;
922 }
923
924 /* if there's no platform we match on the empty platform */
925 platform_name = dai_link->platform_name;
926 if (!platform_name && !dai_link->platform_of_node)
927 platform_name = "snd-soc-dummy";
928
929 /* find one from the set of registered platforms */
930 list_for_each_entry(platform, &platform_list, list) {
931 if (dai_link->platform_of_node) {
932 if (platform->dev->of_node !=
933 dai_link->platform_of_node)
934 continue;
935 } else {
936 if (strcmp(platform->name, platform_name))
937 continue;
938 }
939
940 rtd->platform = platform;
941 }
942 if (!rtd->platform) {
943 dev_err(card->dev, "ASoC: platform %s not registered\n",
944 dai_link->platform_name);
945 return -EPROBE_DEFER;
946 }
947
948 card->num_rtd++;
949
950 return 0;
951 }
952
953 static int soc_remove_platform(struct snd_soc_platform *platform)
954 {
955 int ret;
956
957 if (platform->driver->remove) {
958 ret = platform->driver->remove(platform);
959 if (ret < 0)
960 dev_err(platform->dev, "ASoC: failed to remove %d\n",
961 ret);
962 }
963
964 /* Make sure all DAPM widgets are freed */
965 snd_soc_dapm_free(&platform->dapm);
966
967 soc_cleanup_platform_debugfs(platform);
968 platform->probed = 0;
969 list_del(&platform->card_list);
970 module_put(platform->dev->driver->owner);
971
972 return 0;
973 }
974
975 static void soc_remove_codec(struct snd_soc_codec *codec)
976 {
977 int err;
978
979 if (codec->driver->remove) {
980 err = codec->driver->remove(codec);
981 if (err < 0)
982 dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
983 }
984
985 /* Make sure all DAPM widgets are freed */
986 snd_soc_dapm_free(&codec->dapm);
987
988 soc_cleanup_codec_debugfs(codec);
989 codec->probed = 0;
990 list_del(&codec->card_list);
991 module_put(codec->dev->driver->owner);
992 }
993
994 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
995 {
996 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
997 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
998 int err;
999
1000 /* unregister the rtd device */
1001 if (rtd->dev_registered) {
1002 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
1003 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1004 device_unregister(rtd->dev);
1005 rtd->dev_registered = 0;
1006 }
1007
1008 /* remove the CODEC DAI */
1009 if (codec_dai && codec_dai->probed &&
1010 codec_dai->driver->remove_order == order) {
1011 if (codec_dai->driver->remove) {
1012 err = codec_dai->driver->remove(codec_dai);
1013 if (err < 0)
1014 dev_err(codec_dai->dev,
1015 "ASoC: failed to remove %s: %d\n",
1016 codec_dai->name, err);
1017 }
1018 codec_dai->probed = 0;
1019 list_del(&codec_dai->card_list);
1020 }
1021
1022 /* remove the cpu_dai */
1023 if (cpu_dai && cpu_dai->probed &&
1024 cpu_dai->driver->remove_order == order) {
1025 if (cpu_dai->driver->remove) {
1026 err = cpu_dai->driver->remove(cpu_dai);
1027 if (err < 0)
1028 dev_err(cpu_dai->dev,
1029 "ASoC: failed to remove %s: %d\n",
1030 cpu_dai->name, err);
1031 }
1032 cpu_dai->probed = 0;
1033 list_del(&cpu_dai->card_list);
1034
1035 if (!cpu_dai->codec) {
1036 snd_soc_dapm_free(&cpu_dai->dapm);
1037 module_put(cpu_dai->dev->driver->owner);
1038 }
1039 }
1040 }
1041
1042 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1043 int order)
1044 {
1045 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1046 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1047 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1048 struct snd_soc_platform *platform = rtd->platform;
1049 struct snd_soc_codec *codec;
1050
1051 /* remove the platform */
1052 if (platform && platform->probed &&
1053 platform->driver->remove_order == order) {
1054 soc_remove_platform(platform);
1055 }
1056
1057 /* remove the CODEC-side CODEC */
1058 if (codec_dai) {
1059 codec = codec_dai->codec;
1060 if (codec && codec->probed &&
1061 codec->driver->remove_order == order)
1062 soc_remove_codec(codec);
1063 }
1064
1065 /* remove any CPU-side CODEC */
1066 if (cpu_dai) {
1067 codec = cpu_dai->codec;
1068 if (codec && codec->probed &&
1069 codec->driver->remove_order == order)
1070 soc_remove_codec(codec);
1071 }
1072 }
1073
1074 static void soc_remove_dai_links(struct snd_soc_card *card)
1075 {
1076 int dai, order;
1077
1078 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1079 order++) {
1080 for (dai = 0; dai < card->num_rtd; dai++)
1081 soc_remove_link_dais(card, dai, order);
1082 }
1083
1084 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1085 order++) {
1086 for (dai = 0; dai < card->num_rtd; dai++)
1087 soc_remove_link_components(card, dai, order);
1088 }
1089
1090 card->num_rtd = 0;
1091 }
1092
1093 static void soc_set_name_prefix(struct snd_soc_card *card,
1094 struct snd_soc_codec *codec)
1095 {
1096 int i;
1097
1098 if (card->codec_conf == NULL)
1099 return;
1100
1101 for (i = 0; i < card->num_configs; i++) {
1102 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1103 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1104 codec->name_prefix = map->name_prefix;
1105 break;
1106 }
1107 }
1108 }
1109
1110 static int soc_probe_codec(struct snd_soc_card *card,
1111 struct snd_soc_codec *codec)
1112 {
1113 int ret = 0;
1114 const struct snd_soc_codec_driver *driver = codec->driver;
1115 struct snd_soc_dai *dai;
1116
1117 codec->card = card;
1118 codec->dapm.card = card;
1119 soc_set_name_prefix(card, codec);
1120
1121 if (!try_module_get(codec->dev->driver->owner))
1122 return -ENODEV;
1123
1124 soc_init_codec_debugfs(codec);
1125
1126 if (driver->dapm_widgets)
1127 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1128 driver->num_dapm_widgets);
1129
1130 /* Create DAPM widgets for each DAI stream */
1131 list_for_each_entry(dai, &dai_list, list) {
1132 if (dai->dev != codec->dev)
1133 continue;
1134
1135 snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1136 }
1137
1138 codec->dapm.idle_bias_off = driver->idle_bias_off;
1139
1140 if (driver->probe) {
1141 ret = driver->probe(codec);
1142 if (ret < 0) {
1143 dev_err(codec->dev,
1144 "ASoC: failed to probe CODEC %d\n", ret);
1145 goto err_probe;
1146 }
1147 WARN(codec->dapm.idle_bias_off &&
1148 codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1149 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1150 codec->name);
1151 }
1152
1153 /* If the driver didn't set I/O up try regmap */
1154 if (!codec->write && dev_get_regmap(codec->dev, NULL))
1155 snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
1156
1157 if (driver->controls)
1158 snd_soc_add_codec_controls(codec, driver->controls,
1159 driver->num_controls);
1160 if (driver->dapm_routes)
1161 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1162 driver->num_dapm_routes);
1163
1164 /* mark codec as probed and add to card codec list */
1165 codec->probed = 1;
1166 list_add(&codec->card_list, &card->codec_dev_list);
1167 list_add(&codec->dapm.list, &card->dapm_list);
1168
1169 return 0;
1170
1171 err_probe:
1172 soc_cleanup_codec_debugfs(codec);
1173 module_put(codec->dev->driver->owner);
1174
1175 return ret;
1176 }
1177
1178 static int soc_probe_platform(struct snd_soc_card *card,
1179 struct snd_soc_platform *platform)
1180 {
1181 int ret = 0;
1182 const struct snd_soc_platform_driver *driver = platform->driver;
1183 struct snd_soc_dai *dai;
1184
1185 platform->card = card;
1186 platform->dapm.card = card;
1187
1188 if (!try_module_get(platform->dev->driver->owner))
1189 return -ENODEV;
1190
1191 soc_init_platform_debugfs(platform);
1192
1193 if (driver->dapm_widgets)
1194 snd_soc_dapm_new_controls(&platform->dapm,
1195 driver->dapm_widgets, driver->num_dapm_widgets);
1196
1197 /* Create DAPM widgets for each DAI stream */
1198 list_for_each_entry(dai, &dai_list, list) {
1199 if (dai->dev != platform->dev)
1200 continue;
1201
1202 snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1203 }
1204
1205 platform->dapm.idle_bias_off = 1;
1206
1207 if (driver->probe) {
1208 ret = driver->probe(platform);
1209 if (ret < 0) {
1210 dev_err(platform->dev,
1211 "ASoC: failed to probe platform %d\n", ret);
1212 goto err_probe;
1213 }
1214 }
1215
1216 if (driver->controls)
1217 snd_soc_add_platform_controls(platform, driver->controls,
1218 driver->num_controls);
1219 if (driver->dapm_routes)
1220 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1221 driver->num_dapm_routes);
1222
1223 /* mark platform as probed and add to card platform list */
1224 platform->probed = 1;
1225 list_add(&platform->card_list, &card->platform_dev_list);
1226 list_add(&platform->dapm.list, &card->dapm_list);
1227
1228 return 0;
1229
1230 err_probe:
1231 soc_cleanup_platform_debugfs(platform);
1232 module_put(platform->dev->driver->owner);
1233
1234 return ret;
1235 }
1236
1237 static void rtd_release(struct device *dev)
1238 {
1239 kfree(dev);
1240 }
1241
1242 static int soc_post_component_init(struct snd_soc_card *card,
1243 struct snd_soc_codec *codec,
1244 int num, int dailess)
1245 {
1246 struct snd_soc_dai_link *dai_link = NULL;
1247 struct snd_soc_aux_dev *aux_dev = NULL;
1248 struct snd_soc_pcm_runtime *rtd;
1249 const char *temp, *name;
1250 int ret = 0;
1251
1252 if (!dailess) {
1253 dai_link = &card->dai_link[num];
1254 rtd = &card->rtd[num];
1255 name = dai_link->name;
1256 } else {
1257 aux_dev = &card->aux_dev[num];
1258 rtd = &card->rtd_aux[num];
1259 name = aux_dev->name;
1260 }
1261 rtd->card = card;
1262
1263 /* machine controls, routes and widgets are not prefixed */
1264 temp = codec->name_prefix;
1265 codec->name_prefix = NULL;
1266
1267 /* do machine specific initialization */
1268 if (!dailess && dai_link->init)
1269 ret = dai_link->init(rtd);
1270 else if (dailess && aux_dev->init)
1271 ret = aux_dev->init(&codec->dapm);
1272 if (ret < 0) {
1273 dev_err(card->dev, "ASoC: failed to init %s: %d\n", name, ret);
1274 return ret;
1275 }
1276 codec->name_prefix = temp;
1277
1278 /* register the rtd device */
1279 rtd->codec = codec;
1280
1281 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1282 if (!rtd->dev)
1283 return -ENOMEM;
1284 device_initialize(rtd->dev);
1285 rtd->dev->parent = card->dev;
1286 rtd->dev->release = rtd_release;
1287 rtd->dev->init_name = name;
1288 dev_set_drvdata(rtd->dev, rtd);
1289 mutex_init(&rtd->pcm_mutex);
1290 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1291 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1292 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1293 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1294 ret = device_add(rtd->dev);
1295 if (ret < 0) {
1296 /* calling put_device() here to free the rtd->dev */
1297 put_device(rtd->dev);
1298 dev_err(card->dev,
1299 "ASoC: failed to register runtime device: %d\n", ret);
1300 return ret;
1301 }
1302 rtd->dev_registered = 1;
1303
1304 /* add DAPM sysfs entries for this codec */
1305 ret = snd_soc_dapm_sys_add(rtd->dev);
1306 if (ret < 0)
1307 dev_err(codec->dev,
1308 "ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1309
1310 /* add codec sysfs entries */
1311 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1312 if (ret < 0)
1313 dev_err(codec->dev,
1314 "ASoC: failed to add codec sysfs files: %d\n", ret);
1315
1316 #ifdef CONFIG_DEBUG_FS
1317 /* add DPCM sysfs entries */
1318 if (!dailess && !dai_link->dynamic)
1319 goto out;
1320
1321 ret = soc_dpcm_debugfs_add(rtd);
1322 if (ret < 0)
1323 dev_err(rtd->dev, "ASoC: failed to add dpcm sysfs entries: %d\n", ret);
1324
1325 out:
1326 #endif
1327 return 0;
1328 }
1329
1330 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1331 int order)
1332 {
1333 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1334 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1335 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1336 struct snd_soc_platform *platform = rtd->platform;
1337 int ret;
1338
1339 /* probe the CPU-side component, if it is a CODEC */
1340 if (cpu_dai->codec &&
1341 !cpu_dai->codec->probed &&
1342 cpu_dai->codec->driver->probe_order == order) {
1343 ret = soc_probe_codec(card, cpu_dai->codec);
1344 if (ret < 0)
1345 return ret;
1346 }
1347
1348 /* probe the CODEC-side component */
1349 if (!codec_dai->codec->probed &&
1350 codec_dai->codec->driver->probe_order == order) {
1351 ret = soc_probe_codec(card, codec_dai->codec);
1352 if (ret < 0)
1353 return ret;
1354 }
1355
1356 /* probe the platform */
1357 if (!platform->probed &&
1358 platform->driver->probe_order == order) {
1359 ret = soc_probe_platform(card, platform);
1360 if (ret < 0)
1361 return ret;
1362 }
1363
1364 return 0;
1365 }
1366
1367 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1368 {
1369 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1370 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1371 struct snd_soc_codec *codec = rtd->codec;
1372 struct snd_soc_platform *platform = rtd->platform;
1373 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1374 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1375 struct snd_soc_dapm_widget *play_w, *capture_w;
1376 int ret;
1377
1378 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1379 card->name, num, order);
1380
1381 /* config components */
1382 cpu_dai->platform = platform;
1383 codec_dai->card = card;
1384 cpu_dai->card = card;
1385
1386 /* set default power off timeout */
1387 rtd->pmdown_time = pmdown_time;
1388
1389 /* probe the cpu_dai */
1390 if (!cpu_dai->probed &&
1391 cpu_dai->driver->probe_order == order) {
1392 if (!cpu_dai->codec) {
1393 cpu_dai->dapm.card = card;
1394 if (!try_module_get(cpu_dai->dev->driver->owner))
1395 return -ENODEV;
1396
1397 list_add(&cpu_dai->dapm.list, &card->dapm_list);
1398 }
1399
1400 if (cpu_dai->driver->probe) {
1401 ret = cpu_dai->driver->probe(cpu_dai);
1402 if (ret < 0) {
1403 dev_err(cpu_dai->dev,
1404 "ASoC: failed to probe CPU DAI %s: %d\n",
1405 cpu_dai->name, ret);
1406 module_put(cpu_dai->dev->driver->owner);
1407 return ret;
1408 }
1409 }
1410 cpu_dai->probed = 1;
1411 /* mark cpu_dai as probed and add to card dai list */
1412 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1413 }
1414
1415 /* probe the CODEC DAI */
1416 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1417 if (codec_dai->driver->probe) {
1418 ret = codec_dai->driver->probe(codec_dai);
1419 if (ret < 0) {
1420 dev_err(codec_dai->dev,
1421 "ASoC: failed to probe CODEC DAI %s: %d\n",
1422 codec_dai->name, ret);
1423 return ret;
1424 }
1425 }
1426
1427 /* mark codec_dai as probed and add to card dai list */
1428 codec_dai->probed = 1;
1429 list_add(&codec_dai->card_list, &card->dai_dev_list);
1430 }
1431
1432 /* complete DAI probe during last probe */
1433 if (order != SND_SOC_COMP_ORDER_LAST)
1434 return 0;
1435
1436 ret = soc_post_component_init(card, codec, num, 0);
1437 if (ret)
1438 return ret;
1439
1440 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1441 if (ret < 0)
1442 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1443 ret);
1444
1445 if (cpu_dai->driver->compress_dai) {
1446 /*create compress_device"*/
1447 ret = soc_new_compress(rtd, num);
1448 if (ret < 0) {
1449 dev_err(card->dev, "ASoC: can't create compress %s\n",
1450 dai_link->stream_name);
1451 return ret;
1452 }
1453 } else {
1454
1455 if (!dai_link->params) {
1456 /* create the pcm */
1457 ret = soc_new_pcm(rtd, num);
1458 if (ret < 0) {
1459 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1460 dai_link->stream_name, ret);
1461 return ret;
1462 }
1463 } else {
1464 INIT_DELAYED_WORK(&rtd->delayed_work,
1465 codec2codec_close_delayed_work);
1466
1467 /* link the DAI widgets */
1468 play_w = codec_dai->playback_widget;
1469 capture_w = cpu_dai->capture_widget;
1470 if (play_w && capture_w) {
1471 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1472 capture_w, play_w);
1473 if (ret != 0) {
1474 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1475 play_w->name, capture_w->name, ret);
1476 return ret;
1477 }
1478 }
1479
1480 play_w = cpu_dai->playback_widget;
1481 capture_w = codec_dai->capture_widget;
1482 if (play_w && capture_w) {
1483 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1484 capture_w, play_w);
1485 if (ret != 0) {
1486 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1487 play_w->name, capture_w->name, ret);
1488 return ret;
1489 }
1490 }
1491 }
1492 }
1493
1494 /* add platform data for AC97 devices */
1495 if (rtd->codec_dai->driver->ac97_control)
1496 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1497
1498 return 0;
1499 }
1500
1501 #ifdef CONFIG_SND_SOC_AC97_BUS
1502 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1503 {
1504 int ret;
1505
1506 /* Only instantiate AC97 if not already done by the adaptor
1507 * for the generic AC97 subsystem.
1508 */
1509 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1510 /*
1511 * It is possible that the AC97 device is already registered to
1512 * the device subsystem. This happens when the device is created
1513 * via snd_ac97_mixer(). Currently only SoC codec that does so
1514 * is the generic AC97 glue but others migh emerge.
1515 *
1516 * In those cases we don't try to register the device again.
1517 */
1518 if (!rtd->codec->ac97_created)
1519 return 0;
1520
1521 ret = soc_ac97_dev_register(rtd->codec);
1522 if (ret < 0) {
1523 dev_err(rtd->codec->dev,
1524 "ASoC: AC97 device register failed: %d\n", ret);
1525 return ret;
1526 }
1527
1528 rtd->codec->ac97_registered = 1;
1529 }
1530 return 0;
1531 }
1532
1533 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1534 {
1535 if (codec->ac97_registered) {
1536 soc_ac97_dev_unregister(codec);
1537 codec->ac97_registered = 0;
1538 }
1539 }
1540 #endif
1541
1542 static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1543 {
1544 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1545 struct snd_soc_codec *codec;
1546
1547 /* find CODEC from registered CODECs*/
1548 list_for_each_entry(codec, &codec_list, list) {
1549 if (!strcmp(codec->name, aux_dev->codec_name))
1550 return 0;
1551 }
1552
1553 dev_err(card->dev, "ASoC: %s not registered\n", aux_dev->codec_name);
1554
1555 return -EPROBE_DEFER;
1556 }
1557
1558 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1559 {
1560 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1561 struct snd_soc_codec *codec;
1562 int ret = -ENODEV;
1563
1564 /* find CODEC from registered CODECs*/
1565 list_for_each_entry(codec, &codec_list, list) {
1566 if (!strcmp(codec->name, aux_dev->codec_name)) {
1567 if (codec->probed) {
1568 dev_err(codec->dev,
1569 "ASoC: codec already probed");
1570 ret = -EBUSY;
1571 goto out;
1572 }
1573 goto found;
1574 }
1575 }
1576 /* codec not found */
1577 dev_err(card->dev, "ASoC: codec %s not found", aux_dev->codec_name);
1578 return -EPROBE_DEFER;
1579
1580 found:
1581 ret = soc_probe_codec(card, codec);
1582 if (ret < 0)
1583 return ret;
1584
1585 ret = soc_post_component_init(card, codec, num, 1);
1586
1587 out:
1588 return ret;
1589 }
1590
1591 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1592 {
1593 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1594 struct snd_soc_codec *codec = rtd->codec;
1595
1596 /* unregister the rtd device */
1597 if (rtd->dev_registered) {
1598 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1599 device_unregister(rtd->dev);
1600 rtd->dev_registered = 0;
1601 }
1602
1603 if (codec && codec->probed)
1604 soc_remove_codec(codec);
1605 }
1606
1607 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1608 {
1609 int ret;
1610
1611 if (codec->cache_init)
1612 return 0;
1613
1614 ret = snd_soc_cache_init(codec);
1615 if (ret < 0) {
1616 dev_err(codec->dev,
1617 "ASoC: Failed to set cache compression type: %d\n",
1618 ret);
1619 return ret;
1620 }
1621 codec->cache_init = 1;
1622 return 0;
1623 }
1624
1625 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1626 {
1627 struct snd_soc_codec *codec;
1628 struct snd_soc_dai_link *dai_link;
1629 int ret, i, order, dai_fmt;
1630
1631 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1632
1633 /* bind DAIs */
1634 for (i = 0; i < card->num_links; i++) {
1635 ret = soc_bind_dai_link(card, i);
1636 if (ret != 0)
1637 goto base_error;
1638 }
1639
1640 /* check aux_devs too */
1641 for (i = 0; i < card->num_aux_devs; i++) {
1642 ret = soc_check_aux_dev(card, i);
1643 if (ret != 0)
1644 goto base_error;
1645 }
1646
1647 /* initialize the register cache for each available codec */
1648 list_for_each_entry(codec, &codec_list, list) {
1649 if (codec->cache_init)
1650 continue;
1651 ret = snd_soc_init_codec_cache(codec);
1652 if (ret < 0)
1653 goto base_error;
1654 }
1655
1656 /* card bind complete so register a sound card */
1657 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1658 card->owner, 0, &card->snd_card);
1659 if (ret < 0) {
1660 dev_err(card->dev,
1661 "ASoC: can't create sound card for card %s: %d\n",
1662 card->name, ret);
1663 goto base_error;
1664 }
1665 card->snd_card->dev = card->dev;
1666
1667 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1668 card->dapm.dev = card->dev;
1669 card->dapm.card = card;
1670 list_add(&card->dapm.list, &card->dapm_list);
1671
1672 #ifdef CONFIG_DEBUG_FS
1673 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1674 #endif
1675
1676 #ifdef CONFIG_PM_SLEEP
1677 /* deferred resume work */
1678 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1679 #endif
1680
1681 if (card->dapm_widgets)
1682 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1683 card->num_dapm_widgets);
1684
1685 /* initialise the sound card only once */
1686 if (card->probe) {
1687 ret = card->probe(card);
1688 if (ret < 0)
1689 goto card_probe_error;
1690 }
1691
1692 /* probe all components used by DAI links on this card */
1693 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1694 order++) {
1695 for (i = 0; i < card->num_links; i++) {
1696 ret = soc_probe_link_components(card, i, order);
1697 if (ret < 0) {
1698 dev_err(card->dev,
1699 "ASoC: failed to instantiate card %d\n",
1700 ret);
1701 goto probe_dai_err;
1702 }
1703 }
1704 }
1705
1706 /* probe all DAI links on this card */
1707 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1708 order++) {
1709 for (i = 0; i < card->num_links; i++) {
1710 ret = soc_probe_link_dais(card, i, order);
1711 if (ret < 0) {
1712 dev_err(card->dev,
1713 "ASoC: failed to instantiate card %d\n",
1714 ret);
1715 goto probe_dai_err;
1716 }
1717 }
1718 }
1719
1720 for (i = 0; i < card->num_aux_devs; i++) {
1721 ret = soc_probe_aux_dev(card, i);
1722 if (ret < 0) {
1723 dev_err(card->dev,
1724 "ASoC: failed to add auxiliary devices %d\n",
1725 ret);
1726 goto probe_aux_dev_err;
1727 }
1728 }
1729
1730 snd_soc_dapm_link_dai_widgets(card);
1731 snd_soc_dapm_connect_dai_link_widgets(card);
1732
1733 if (card->controls)
1734 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1735
1736 if (card->dapm_routes)
1737 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1738 card->num_dapm_routes);
1739
1740 for (i = 0; i < card->num_links; i++) {
1741 dai_link = &card->dai_link[i];
1742 dai_fmt = dai_link->dai_fmt;
1743
1744 if (dai_fmt) {
1745 ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1746 dai_fmt);
1747 if (ret != 0 && ret != -ENOTSUPP)
1748 dev_warn(card->rtd[i].codec_dai->dev,
1749 "ASoC: Failed to set DAI format: %d\n",
1750 ret);
1751 }
1752
1753 /* If this is a regular CPU link there will be a platform */
1754 if (dai_fmt &&
1755 (dai_link->platform_name || dai_link->platform_of_node)) {
1756 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1757 dai_fmt);
1758 if (ret != 0 && ret != -ENOTSUPP)
1759 dev_warn(card->rtd[i].cpu_dai->dev,
1760 "ASoC: Failed to set DAI format: %d\n",
1761 ret);
1762 } else if (dai_fmt) {
1763 /* Flip the polarity for the "CPU" end */
1764 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1765 switch (dai_link->dai_fmt &
1766 SND_SOC_DAIFMT_MASTER_MASK) {
1767 case SND_SOC_DAIFMT_CBM_CFM:
1768 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1769 break;
1770 case SND_SOC_DAIFMT_CBM_CFS:
1771 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1772 break;
1773 case SND_SOC_DAIFMT_CBS_CFM:
1774 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1775 break;
1776 case SND_SOC_DAIFMT_CBS_CFS:
1777 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1778 break;
1779 }
1780
1781 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1782 dai_fmt);
1783 if (ret != 0 && ret != -ENOTSUPP)
1784 dev_warn(card->rtd[i].cpu_dai->dev,
1785 "ASoC: Failed to set DAI format: %d\n",
1786 ret);
1787 }
1788 }
1789
1790 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1791 "%s", card->name);
1792 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1793 "%s", card->long_name ? card->long_name : card->name);
1794 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1795 "%s", card->driver_name ? card->driver_name : card->name);
1796 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1797 switch (card->snd_card->driver[i]) {
1798 case '_':
1799 case '-':
1800 case '\0':
1801 break;
1802 default:
1803 if (!isalnum(card->snd_card->driver[i]))
1804 card->snd_card->driver[i] = '_';
1805 break;
1806 }
1807 }
1808
1809 if (card->late_probe) {
1810 ret = card->late_probe(card);
1811 if (ret < 0) {
1812 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1813 card->name, ret);
1814 goto probe_aux_dev_err;
1815 }
1816 }
1817
1818 if (card->fully_routed)
1819 list_for_each_entry(codec, &card->codec_dev_list, card_list)
1820 snd_soc_dapm_auto_nc_codec_pins(codec);
1821
1822 snd_soc_dapm_new_widgets(card);
1823
1824 ret = snd_card_register(card->snd_card);
1825 if (ret < 0) {
1826 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1827 ret);
1828 goto probe_aux_dev_err;
1829 }
1830
1831 #ifdef CONFIG_SND_SOC_AC97_BUS
1832 /* register any AC97 codecs */
1833 for (i = 0; i < card->num_rtd; i++) {
1834 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1835 if (ret < 0) {
1836 dev_err(card->dev,
1837 "ASoC: failed to register AC97: %d\n", ret);
1838 while (--i >= 0)
1839 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1840 goto probe_aux_dev_err;
1841 }
1842 }
1843 #endif
1844
1845 card->instantiated = 1;
1846 snd_soc_dapm_sync(&card->dapm);
1847 mutex_unlock(&card->mutex);
1848
1849 return 0;
1850
1851 probe_aux_dev_err:
1852 for (i = 0; i < card->num_aux_devs; i++)
1853 soc_remove_aux_dev(card, i);
1854
1855 probe_dai_err:
1856 soc_remove_dai_links(card);
1857
1858 card_probe_error:
1859 if (card->remove)
1860 card->remove(card);
1861
1862 snd_card_free(card->snd_card);
1863
1864 base_error:
1865 mutex_unlock(&card->mutex);
1866
1867 return ret;
1868 }
1869
1870 /* probes a new socdev */
1871 static int soc_probe(struct platform_device *pdev)
1872 {
1873 struct snd_soc_card *card = platform_get_drvdata(pdev);
1874
1875 /*
1876 * no card, so machine driver should be registering card
1877 * we should not be here in that case so ret error
1878 */
1879 if (!card)
1880 return -EINVAL;
1881
1882 dev_warn(&pdev->dev,
1883 "ASoC: machine %s should use snd_soc_register_card()\n",
1884 card->name);
1885
1886 /* Bodge while we unpick instantiation */
1887 card->dev = &pdev->dev;
1888
1889 return snd_soc_register_card(card);
1890 }
1891
1892 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1893 {
1894 int i;
1895
1896 /* make sure any delayed work runs */
1897 for (i = 0; i < card->num_rtd; i++) {
1898 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1899 flush_delayed_work(&rtd->delayed_work);
1900 }
1901
1902 /* remove auxiliary devices */
1903 for (i = 0; i < card->num_aux_devs; i++)
1904 soc_remove_aux_dev(card, i);
1905
1906 /* remove and free each DAI */
1907 soc_remove_dai_links(card);
1908
1909 soc_cleanup_card_debugfs(card);
1910
1911 /* remove the card */
1912 if (card->remove)
1913 card->remove(card);
1914
1915 snd_soc_dapm_free(&card->dapm);
1916
1917 snd_card_free(card->snd_card);
1918 return 0;
1919
1920 }
1921
1922 /* removes a socdev */
1923 static int soc_remove(struct platform_device *pdev)
1924 {
1925 struct snd_soc_card *card = platform_get_drvdata(pdev);
1926
1927 snd_soc_unregister_card(card);
1928 return 0;
1929 }
1930
1931 int snd_soc_poweroff(struct device *dev)
1932 {
1933 struct snd_soc_card *card = dev_get_drvdata(dev);
1934 int i;
1935
1936 if (!card->instantiated)
1937 return 0;
1938
1939 /* Flush out pmdown_time work - we actually do want to run it
1940 * now, we're shutting down so no imminent restart. */
1941 for (i = 0; i < card->num_rtd; i++) {
1942 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1943 flush_delayed_work(&rtd->delayed_work);
1944 }
1945
1946 snd_soc_dapm_shutdown(card);
1947
1948 /* deactivate pins to sleep state */
1949 for (i = 0; i < card->num_rtd; i++) {
1950 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1951 struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
1952 pinctrl_pm_select_sleep_state(codec_dai->dev);
1953 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1954 }
1955
1956 return 0;
1957 }
1958 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1959
1960 const struct dev_pm_ops snd_soc_pm_ops = {
1961 .suspend = snd_soc_suspend,
1962 .resume = snd_soc_resume,
1963 .freeze = snd_soc_suspend,
1964 .thaw = snd_soc_resume,
1965 .poweroff = snd_soc_poweroff,
1966 .restore = snd_soc_resume,
1967 };
1968 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1969
1970 /* ASoC platform driver */
1971 static struct platform_driver soc_driver = {
1972 .driver = {
1973 .name = "soc-audio",
1974 .owner = THIS_MODULE,
1975 .pm = &snd_soc_pm_ops,
1976 },
1977 .probe = soc_probe,
1978 .remove = soc_remove,
1979 };
1980
1981 /**
1982 * snd_soc_codec_volatile_register: Report if a register is volatile.
1983 *
1984 * @codec: CODEC to query.
1985 * @reg: Register to query.
1986 *
1987 * Boolean function indiciating if a CODEC register is volatile.
1988 */
1989 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1990 unsigned int reg)
1991 {
1992 if (codec->volatile_register)
1993 return codec->volatile_register(codec, reg);
1994 else
1995 return 0;
1996 }
1997 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1998
1999 /**
2000 * snd_soc_codec_readable_register: Report if a register is readable.
2001 *
2002 * @codec: CODEC to query.
2003 * @reg: Register to query.
2004 *
2005 * Boolean function indicating if a CODEC register is readable.
2006 */
2007 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2008 unsigned int reg)
2009 {
2010 if (codec->readable_register)
2011 return codec->readable_register(codec, reg);
2012 else
2013 return 1;
2014 }
2015 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2016
2017 /**
2018 * snd_soc_codec_writable_register: Report if a register is writable.
2019 *
2020 * @codec: CODEC to query.
2021 * @reg: Register to query.
2022 *
2023 * Boolean function indicating if a CODEC register is writable.
2024 */
2025 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2026 unsigned int reg)
2027 {
2028 if (codec->writable_register)
2029 return codec->writable_register(codec, reg);
2030 else
2031 return 1;
2032 }
2033 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2034
2035 int snd_soc_platform_read(struct snd_soc_platform *platform,
2036 unsigned int reg)
2037 {
2038 unsigned int ret;
2039
2040 if (!platform->driver->read) {
2041 dev_err(platform->dev, "ASoC: platform has no read back\n");
2042 return -1;
2043 }
2044
2045 ret = platform->driver->read(platform, reg);
2046 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
2047 trace_snd_soc_preg_read(platform, reg, ret);
2048
2049 return ret;
2050 }
2051 EXPORT_SYMBOL_GPL(snd_soc_platform_read);
2052
2053 int snd_soc_platform_write(struct snd_soc_platform *platform,
2054 unsigned int reg, unsigned int val)
2055 {
2056 if (!platform->driver->write) {
2057 dev_err(platform->dev, "ASoC: platform has no write back\n");
2058 return -1;
2059 }
2060
2061 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
2062 trace_snd_soc_preg_write(platform, reg, val);
2063 return platform->driver->write(platform, reg, val);
2064 }
2065 EXPORT_SYMBOL_GPL(snd_soc_platform_write);
2066
2067 /**
2068 * snd_soc_new_ac97_codec - initailise AC97 device
2069 * @codec: audio codec
2070 * @ops: AC97 bus operations
2071 * @num: AC97 codec number
2072 *
2073 * Initialises AC97 codec resources for use by ad-hoc devices only.
2074 */
2075 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2076 struct snd_ac97_bus_ops *ops, int num)
2077 {
2078 mutex_lock(&codec->mutex);
2079
2080 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2081 if (codec->ac97 == NULL) {
2082 mutex_unlock(&codec->mutex);
2083 return -ENOMEM;
2084 }
2085
2086 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2087 if (codec->ac97->bus == NULL) {
2088 kfree(codec->ac97);
2089 codec->ac97 = NULL;
2090 mutex_unlock(&codec->mutex);
2091 return -ENOMEM;
2092 }
2093
2094 codec->ac97->bus->ops = ops;
2095 codec->ac97->num = num;
2096
2097 /*
2098 * Mark the AC97 device to be created by us. This way we ensure that the
2099 * device will be registered with the device subsystem later on.
2100 */
2101 codec->ac97_created = 1;
2102
2103 mutex_unlock(&codec->mutex);
2104 return 0;
2105 }
2106 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2107
2108 static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;
2109
2110 static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
2111 {
2112 struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2113
2114 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);
2115
2116 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);
2117
2118 udelay(10);
2119
2120 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2121
2122 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2123 msleep(2);
2124 }
2125
2126 static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
2127 {
2128 struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2129
2130 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);
2131
2132 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2133 gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
2134 gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);
2135
2136 udelay(10);
2137
2138 gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);
2139
2140 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2141 msleep(2);
2142 }
2143
2144 static int snd_soc_ac97_parse_pinctl(struct device *dev,
2145 struct snd_ac97_reset_cfg *cfg)
2146 {
2147 struct pinctrl *p;
2148 struct pinctrl_state *state;
2149 int gpio;
2150 int ret;
2151
2152 p = devm_pinctrl_get(dev);
2153 if (IS_ERR(p)) {
2154 dev_err(dev, "Failed to get pinctrl\n");
2155 return PTR_RET(p);
2156 }
2157 cfg->pctl = p;
2158
2159 state = pinctrl_lookup_state(p, "ac97-reset");
2160 if (IS_ERR(state)) {
2161 dev_err(dev, "Can't find pinctrl state ac97-reset\n");
2162 return PTR_RET(state);
2163 }
2164 cfg->pstate_reset = state;
2165
2166 state = pinctrl_lookup_state(p, "ac97-warm-reset");
2167 if (IS_ERR(state)) {
2168 dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
2169 return PTR_RET(state);
2170 }
2171 cfg->pstate_warm_reset = state;
2172
2173 state = pinctrl_lookup_state(p, "ac97-running");
2174 if (IS_ERR(state)) {
2175 dev_err(dev, "Can't find pinctrl state ac97-running\n");
2176 return PTR_RET(state);
2177 }
2178 cfg->pstate_run = state;
2179
2180 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
2181 if (gpio < 0) {
2182 dev_err(dev, "Can't find ac97-sync gpio\n");
2183 return gpio;
2184 }
2185 ret = devm_gpio_request(dev, gpio, "AC97 link sync");
2186 if (ret) {
2187 dev_err(dev, "Failed requesting ac97-sync gpio\n");
2188 return ret;
2189 }
2190 cfg->gpio_sync = gpio;
2191
2192 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
2193 if (gpio < 0) {
2194 dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
2195 return gpio;
2196 }
2197 ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
2198 if (ret) {
2199 dev_err(dev, "Failed requesting ac97-sdata gpio\n");
2200 return ret;
2201 }
2202 cfg->gpio_sdata = gpio;
2203
2204 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
2205 if (gpio < 0) {
2206 dev_err(dev, "Can't find ac97-reset gpio\n");
2207 return gpio;
2208 }
2209 ret = devm_gpio_request(dev, gpio, "AC97 link reset");
2210 if (ret) {
2211 dev_err(dev, "Failed requesting ac97-reset gpio\n");
2212 return ret;
2213 }
2214 cfg->gpio_reset = gpio;
2215
2216 return 0;
2217 }
2218
2219 struct snd_ac97_bus_ops *soc_ac97_ops;
2220 EXPORT_SYMBOL_GPL(soc_ac97_ops);
2221
2222 int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
2223 {
2224 if (ops == soc_ac97_ops)
2225 return 0;
2226
2227 if (soc_ac97_ops && ops)
2228 return -EBUSY;
2229
2230 soc_ac97_ops = ops;
2231
2232 return 0;
2233 }
2234 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);
2235
2236 /**
2237 * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions
2238 *
2239 * This function sets the reset and warm_reset properties of ops and parses
2240 * the device node of pdev to get pinctrl states and gpio numbers to use.
2241 */
2242 int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,
2243 struct platform_device *pdev)
2244 {
2245 struct device *dev = &pdev->dev;
2246 struct snd_ac97_reset_cfg cfg;
2247 int ret;
2248
2249 ret = snd_soc_ac97_parse_pinctl(dev, &cfg);
2250 if (ret)
2251 return ret;
2252
2253 ret = snd_soc_set_ac97_ops(ops);
2254 if (ret)
2255 return ret;
2256
2257 ops->warm_reset = snd_soc_ac97_warm_reset;
2258 ops->reset = snd_soc_ac97_reset;
2259
2260 snd_ac97_rst_cfg = cfg;
2261 return 0;
2262 }
2263 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);
2264
2265 /**
2266 * snd_soc_free_ac97_codec - free AC97 codec device
2267 * @codec: audio codec
2268 *
2269 * Frees AC97 codec device resources.
2270 */
2271 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2272 {
2273 mutex_lock(&codec->mutex);
2274 #ifdef CONFIG_SND_SOC_AC97_BUS
2275 soc_unregister_ac97_dai_link(codec);
2276 #endif
2277 kfree(codec->ac97->bus);
2278 kfree(codec->ac97);
2279 codec->ac97 = NULL;
2280 codec->ac97_created = 0;
2281 mutex_unlock(&codec->mutex);
2282 }
2283 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2284
2285 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2286 {
2287 unsigned int ret;
2288
2289 ret = codec->read(codec, reg);
2290 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2291 trace_snd_soc_reg_read(codec, reg, ret);
2292
2293 return ret;
2294 }
2295 EXPORT_SYMBOL_GPL(snd_soc_read);
2296
2297 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2298 unsigned int reg, unsigned int val)
2299 {
2300 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2301 trace_snd_soc_reg_write(codec, reg, val);
2302 return codec->write(codec, reg, val);
2303 }
2304 EXPORT_SYMBOL_GPL(snd_soc_write);
2305
2306 /**
2307 * snd_soc_update_bits - update codec register bits
2308 * @codec: audio codec
2309 * @reg: codec register
2310 * @mask: register mask
2311 * @value: new value
2312 *
2313 * Writes new register value.
2314 *
2315 * Returns 1 for change, 0 for no change, or negative error code.
2316 */
2317 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2318 unsigned int mask, unsigned int value)
2319 {
2320 bool change;
2321 unsigned int old, new;
2322 int ret;
2323
2324 if (codec->using_regmap) {
2325 ret = regmap_update_bits_check(codec->control_data, reg,
2326 mask, value, &change);
2327 } else {
2328 ret = snd_soc_read(codec, reg);
2329 if (ret < 0)
2330 return ret;
2331
2332 old = ret;
2333 new = (old & ~mask) | (value & mask);
2334 change = old != new;
2335 if (change)
2336 ret = snd_soc_write(codec, reg, new);
2337 }
2338
2339 if (ret < 0)
2340 return ret;
2341
2342 return change;
2343 }
2344 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2345
2346 /**
2347 * snd_soc_update_bits_locked - update codec register bits
2348 * @codec: audio codec
2349 * @reg: codec register
2350 * @mask: register mask
2351 * @value: new value
2352 *
2353 * Writes new register value, and takes the codec mutex.
2354 *
2355 * Returns 1 for change else 0.
2356 */
2357 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2358 unsigned short reg, unsigned int mask,
2359 unsigned int value)
2360 {
2361 int change;
2362
2363 mutex_lock(&codec->mutex);
2364 change = snd_soc_update_bits(codec, reg, mask, value);
2365 mutex_unlock(&codec->mutex);
2366
2367 return change;
2368 }
2369 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2370
2371 /**
2372 * snd_soc_test_bits - test register for change
2373 * @codec: audio codec
2374 * @reg: codec register
2375 * @mask: register mask
2376 * @value: new value
2377 *
2378 * Tests a register with a new value and checks if the new value is
2379 * different from the old value.
2380 *
2381 * Returns 1 for change else 0.
2382 */
2383 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2384 unsigned int mask, unsigned int value)
2385 {
2386 int change;
2387 unsigned int old, new;
2388
2389 old = snd_soc_read(codec, reg);
2390 new = (old & ~mask) | value;
2391 change = old != new;
2392
2393 return change;
2394 }
2395 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2396
2397 /**
2398 * snd_soc_cnew - create new control
2399 * @_template: control template
2400 * @data: control private data
2401 * @long_name: control long name
2402 * @prefix: control name prefix
2403 *
2404 * Create a new mixer control from a template control.
2405 *
2406 * Returns 0 for success, else error.
2407 */
2408 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2409 void *data, const char *long_name,
2410 const char *prefix)
2411 {
2412 struct snd_kcontrol_new template;
2413 struct snd_kcontrol *kcontrol;
2414 char *name = NULL;
2415
2416 memcpy(&template, _template, sizeof(template));
2417 template.index = 0;
2418
2419 if (!long_name)
2420 long_name = template.name;
2421
2422 if (prefix) {
2423 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2424 if (!name)
2425 return NULL;
2426
2427 template.name = name;
2428 } else {
2429 template.name = long_name;
2430 }
2431
2432 kcontrol = snd_ctl_new1(&template, data);
2433
2434 kfree(name);
2435
2436 return kcontrol;
2437 }
2438 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2439
2440 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2441 const struct snd_kcontrol_new *controls, int num_controls,
2442 const char *prefix, void *data)
2443 {
2444 int err, i;
2445
2446 for (i = 0; i < num_controls; i++) {
2447 const struct snd_kcontrol_new *control = &controls[i];
2448 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2449 control->name, prefix));
2450 if (err < 0) {
2451 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2452 control->name, err);
2453 return err;
2454 }
2455 }
2456
2457 return 0;
2458 }
2459
2460 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2461 const char *name)
2462 {
2463 struct snd_card *card = soc_card->snd_card;
2464 struct snd_kcontrol *kctl;
2465
2466 if (unlikely(!name))
2467 return NULL;
2468
2469 list_for_each_entry(kctl, &card->controls, list)
2470 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2471 return kctl;
2472 return NULL;
2473 }
2474 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2475
2476 /**
2477 * snd_soc_add_codec_controls - add an array of controls to a codec.
2478 * Convenience function to add a list of controls. Many codecs were
2479 * duplicating this code.
2480 *
2481 * @codec: codec to add controls to
2482 * @controls: array of controls to add
2483 * @num_controls: number of elements in the array
2484 *
2485 * Return 0 for success, else error.
2486 */
2487 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2488 const struct snd_kcontrol_new *controls, int num_controls)
2489 {
2490 struct snd_card *card = codec->card->snd_card;
2491
2492 return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2493 codec->name_prefix, codec);
2494 }
2495 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2496
2497 /**
2498 * snd_soc_add_platform_controls - add an array of controls to a platform.
2499 * Convenience function to add a list of controls.
2500 *
2501 * @platform: platform to add controls to
2502 * @controls: array of controls to add
2503 * @num_controls: number of elements in the array
2504 *
2505 * Return 0 for success, else error.
2506 */
2507 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2508 const struct snd_kcontrol_new *controls, int num_controls)
2509 {
2510 struct snd_card *card = platform->card->snd_card;
2511
2512 return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2513 NULL, platform);
2514 }
2515 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2516
2517 /**
2518 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2519 * Convenience function to add a list of controls.
2520 *
2521 * @soc_card: SoC card to add controls to
2522 * @controls: array of controls to add
2523 * @num_controls: number of elements in the array
2524 *
2525 * Return 0 for success, else error.
2526 */
2527 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2528 const struct snd_kcontrol_new *controls, int num_controls)
2529 {
2530 struct snd_card *card = soc_card->snd_card;
2531
2532 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2533 NULL, soc_card);
2534 }
2535 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2536
2537 /**
2538 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2539 * Convienience function to add a list of controls.
2540 *
2541 * @dai: DAI to add controls to
2542 * @controls: array of controls to add
2543 * @num_controls: number of elements in the array
2544 *
2545 * Return 0 for success, else error.
2546 */
2547 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2548 const struct snd_kcontrol_new *controls, int num_controls)
2549 {
2550 struct snd_card *card = dai->card->snd_card;
2551
2552 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2553 NULL, dai);
2554 }
2555 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2556
2557 /**
2558 * snd_soc_info_enum_double - enumerated double mixer info callback
2559 * @kcontrol: mixer control
2560 * @uinfo: control element information
2561 *
2562 * Callback to provide information about a double enumerated
2563 * mixer control.
2564 *
2565 * Returns 0 for success.
2566 */
2567 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2568 struct snd_ctl_elem_info *uinfo)
2569 {
2570 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2571
2572 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2573 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2574 uinfo->value.enumerated.items = e->max;
2575
2576 if (uinfo->value.enumerated.item > e->max - 1)
2577 uinfo->value.enumerated.item = e->max - 1;
2578 strlcpy(uinfo->value.enumerated.name,
2579 e->texts[uinfo->value.enumerated.item],
2580 sizeof(uinfo->value.enumerated.name));
2581 return 0;
2582 }
2583 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2584
2585 /**
2586 * snd_soc_get_enum_double - enumerated double mixer get callback
2587 * @kcontrol: mixer control
2588 * @ucontrol: control element information
2589 *
2590 * Callback to get the value of a double enumerated mixer.
2591 *
2592 * Returns 0 for success.
2593 */
2594 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2595 struct snd_ctl_elem_value *ucontrol)
2596 {
2597 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2598 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2599 unsigned int val;
2600
2601 val = snd_soc_read(codec, e->reg);
2602 ucontrol->value.enumerated.item[0]
2603 = (val >> e->shift_l) & e->mask;
2604 if (e->shift_l != e->shift_r)
2605 ucontrol->value.enumerated.item[1] =
2606 (val >> e->shift_r) & e->mask;
2607
2608 return 0;
2609 }
2610 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2611
2612 /**
2613 * snd_soc_put_enum_double - enumerated double mixer put callback
2614 * @kcontrol: mixer control
2615 * @ucontrol: control element information
2616 *
2617 * Callback to set the value of a double enumerated mixer.
2618 *
2619 * Returns 0 for success.
2620 */
2621 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2622 struct snd_ctl_elem_value *ucontrol)
2623 {
2624 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2625 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2626 unsigned int val;
2627 unsigned int mask;
2628
2629 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2630 return -EINVAL;
2631 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2632 mask = e->mask << e->shift_l;
2633 if (e->shift_l != e->shift_r) {
2634 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2635 return -EINVAL;
2636 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2637 mask |= e->mask << e->shift_r;
2638 }
2639
2640 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2641 }
2642 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2643
2644 /**
2645 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2646 * @kcontrol: mixer control
2647 * @ucontrol: control element information
2648 *
2649 * Callback to get the value of a double semi enumerated mixer.
2650 *
2651 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2652 * used for handling bitfield coded enumeration for example.
2653 *
2654 * Returns 0 for success.
2655 */
2656 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2657 struct snd_ctl_elem_value *ucontrol)
2658 {
2659 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2660 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2661 unsigned int reg_val, val, mux;
2662
2663 reg_val = snd_soc_read(codec, e->reg);
2664 val = (reg_val >> e->shift_l) & e->mask;
2665 for (mux = 0; mux < e->max; mux++) {
2666 if (val == e->values[mux])
2667 break;
2668 }
2669 ucontrol->value.enumerated.item[0] = mux;
2670 if (e->shift_l != e->shift_r) {
2671 val = (reg_val >> e->shift_r) & e->mask;
2672 for (mux = 0; mux < e->max; mux++) {
2673 if (val == e->values[mux])
2674 break;
2675 }
2676 ucontrol->value.enumerated.item[1] = mux;
2677 }
2678
2679 return 0;
2680 }
2681 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2682
2683 /**
2684 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2685 * @kcontrol: mixer control
2686 * @ucontrol: control element information
2687 *
2688 * Callback to set the value of a double semi enumerated mixer.
2689 *
2690 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2691 * used for handling bitfield coded enumeration for example.
2692 *
2693 * Returns 0 for success.
2694 */
2695 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2696 struct snd_ctl_elem_value *ucontrol)
2697 {
2698 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2699 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2700 unsigned int val;
2701 unsigned int mask;
2702
2703 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2704 return -EINVAL;
2705 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2706 mask = e->mask << e->shift_l;
2707 if (e->shift_l != e->shift_r) {
2708 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2709 return -EINVAL;
2710 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2711 mask |= e->mask << e->shift_r;
2712 }
2713
2714 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2715 }
2716 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2717
2718 /**
2719 * snd_soc_info_volsw - single mixer info callback
2720 * @kcontrol: mixer control
2721 * @uinfo: control element information
2722 *
2723 * Callback to provide information about a single mixer control, or a double
2724 * mixer control that spans 2 registers.
2725 *
2726 * Returns 0 for success.
2727 */
2728 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2729 struct snd_ctl_elem_info *uinfo)
2730 {
2731 struct soc_mixer_control *mc =
2732 (struct soc_mixer_control *)kcontrol->private_value;
2733 int platform_max;
2734
2735 if (!mc->platform_max)
2736 mc->platform_max = mc->max;
2737 platform_max = mc->platform_max;
2738
2739 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2740 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2741 else
2742 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2743
2744 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2745 uinfo->value.integer.min = 0;
2746 uinfo->value.integer.max = platform_max;
2747 return 0;
2748 }
2749 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2750
2751 /**
2752 * snd_soc_get_volsw - single mixer get callback
2753 * @kcontrol: mixer control
2754 * @ucontrol: control element information
2755 *
2756 * Callback to get the value of a single mixer control, or a double mixer
2757 * control that spans 2 registers.
2758 *
2759 * Returns 0 for success.
2760 */
2761 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2762 struct snd_ctl_elem_value *ucontrol)
2763 {
2764 struct soc_mixer_control *mc =
2765 (struct soc_mixer_control *)kcontrol->private_value;
2766 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2767 unsigned int reg = mc->reg;
2768 unsigned int reg2 = mc->rreg;
2769 unsigned int shift = mc->shift;
2770 unsigned int rshift = mc->rshift;
2771 int max = mc->max;
2772 unsigned int mask = (1 << fls(max)) - 1;
2773 unsigned int invert = mc->invert;
2774
2775 ucontrol->value.integer.value[0] =
2776 (snd_soc_read(codec, reg) >> shift) & mask;
2777 if (invert)
2778 ucontrol->value.integer.value[0] =
2779 max - ucontrol->value.integer.value[0];
2780
2781 if (snd_soc_volsw_is_stereo(mc)) {
2782 if (reg == reg2)
2783 ucontrol->value.integer.value[1] =
2784 (snd_soc_read(codec, reg) >> rshift) & mask;
2785 else
2786 ucontrol->value.integer.value[1] =
2787 (snd_soc_read(codec, reg2) >> shift) & mask;
2788 if (invert)
2789 ucontrol->value.integer.value[1] =
2790 max - ucontrol->value.integer.value[1];
2791 }
2792
2793 return 0;
2794 }
2795 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2796
2797 /**
2798 * snd_soc_put_volsw - single mixer put callback
2799 * @kcontrol: mixer control
2800 * @ucontrol: control element information
2801 *
2802 * Callback to set the value of a single mixer control, or a double mixer
2803 * control that spans 2 registers.
2804 *
2805 * Returns 0 for success.
2806 */
2807 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2808 struct snd_ctl_elem_value *ucontrol)
2809 {
2810 struct soc_mixer_control *mc =
2811 (struct soc_mixer_control *)kcontrol->private_value;
2812 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2813 unsigned int reg = mc->reg;
2814 unsigned int reg2 = mc->rreg;
2815 unsigned int shift = mc->shift;
2816 unsigned int rshift = mc->rshift;
2817 int max = mc->max;
2818 unsigned int mask = (1 << fls(max)) - 1;
2819 unsigned int invert = mc->invert;
2820 int err;
2821 bool type_2r = 0;
2822 unsigned int val2 = 0;
2823 unsigned int val, val_mask;
2824
2825 val = (ucontrol->value.integer.value[0] & mask);
2826 if (invert)
2827 val = max - val;
2828 val_mask = mask << shift;
2829 val = val << shift;
2830 if (snd_soc_volsw_is_stereo(mc)) {
2831 val2 = (ucontrol->value.integer.value[1] & mask);
2832 if (invert)
2833 val2 = max - val2;
2834 if (reg == reg2) {
2835 val_mask |= mask << rshift;
2836 val |= val2 << rshift;
2837 } else {
2838 val2 = val2 << shift;
2839 type_2r = 1;
2840 }
2841 }
2842 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2843 if (err < 0)
2844 return err;
2845
2846 if (type_2r)
2847 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2848
2849 return err;
2850 }
2851 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2852
2853 /**
2854 * snd_soc_get_volsw_sx - single mixer get callback
2855 * @kcontrol: mixer control
2856 * @ucontrol: control element information
2857 *
2858 * Callback to get the value of a single mixer control, or a double mixer
2859 * control that spans 2 registers.
2860 *
2861 * Returns 0 for success.
2862 */
2863 int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2864 struct snd_ctl_elem_value *ucontrol)
2865 {
2866 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2867 struct soc_mixer_control *mc =
2868 (struct soc_mixer_control *)kcontrol->private_value;
2869
2870 unsigned int reg = mc->reg;
2871 unsigned int reg2 = mc->rreg;
2872 unsigned int shift = mc->shift;
2873 unsigned int rshift = mc->rshift;
2874 int max = mc->max;
2875 int min = mc->min;
2876 int mask = (1 << (fls(min + max) - 1)) - 1;
2877
2878 ucontrol->value.integer.value[0] =
2879 ((snd_soc_read(codec, reg) >> shift) - min) & mask;
2880
2881 if (snd_soc_volsw_is_stereo(mc))
2882 ucontrol->value.integer.value[1] =
2883 ((snd_soc_read(codec, reg2) >> rshift) - min) & mask;
2884
2885 return 0;
2886 }
2887 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2888
2889 /**
2890 * snd_soc_put_volsw_sx - double mixer set callback
2891 * @kcontrol: mixer control
2892 * @uinfo: control element information
2893 *
2894 * Callback to set the value of a double mixer control that spans 2 registers.
2895 *
2896 * Returns 0 for success.
2897 */
2898 int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2899 struct snd_ctl_elem_value *ucontrol)
2900 {
2901 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2902 struct soc_mixer_control *mc =
2903 (struct soc_mixer_control *)kcontrol->private_value;
2904
2905 unsigned int reg = mc->reg;
2906 unsigned int reg2 = mc->rreg;
2907 unsigned int shift = mc->shift;
2908 unsigned int rshift = mc->rshift;
2909 int max = mc->max;
2910 int min = mc->min;
2911 int mask = (1 << (fls(min + max) - 1)) - 1;
2912 int err = 0;
2913 unsigned short val, val_mask, val2 = 0;
2914
2915 val_mask = mask << shift;
2916 val = (ucontrol->value.integer.value[0] + min) & mask;
2917 val = val << shift;
2918
2919 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2920 if (err < 0)
2921 return err;
2922
2923 if (snd_soc_volsw_is_stereo(mc)) {
2924 val_mask = mask << rshift;
2925 val2 = (ucontrol->value.integer.value[1] + min) & mask;
2926 val2 = val2 << rshift;
2927
2928 if (snd_soc_update_bits_locked(codec, reg2, val_mask, val2))
2929 return err;
2930 }
2931 return 0;
2932 }
2933 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2934
2935 /**
2936 * snd_soc_info_volsw_s8 - signed mixer info callback
2937 * @kcontrol: mixer control
2938 * @uinfo: control element information
2939 *
2940 * Callback to provide information about a signed mixer control.
2941 *
2942 * Returns 0 for success.
2943 */
2944 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2945 struct snd_ctl_elem_info *uinfo)
2946 {
2947 struct soc_mixer_control *mc =
2948 (struct soc_mixer_control *)kcontrol->private_value;
2949 int platform_max;
2950 int min = mc->min;
2951
2952 if (!mc->platform_max)
2953 mc->platform_max = mc->max;
2954 platform_max = mc->platform_max;
2955
2956 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2957 uinfo->count = 2;
2958 uinfo->value.integer.min = 0;
2959 uinfo->value.integer.max = platform_max - min;
2960 return 0;
2961 }
2962 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2963
2964 /**
2965 * snd_soc_get_volsw_s8 - signed mixer get callback
2966 * @kcontrol: mixer control
2967 * @ucontrol: control element information
2968 *
2969 * Callback to get the value of a signed mixer control.
2970 *
2971 * Returns 0 for success.
2972 */
2973 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2974 struct snd_ctl_elem_value *ucontrol)
2975 {
2976 struct soc_mixer_control *mc =
2977 (struct soc_mixer_control *)kcontrol->private_value;
2978 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2979 unsigned int reg = mc->reg;
2980 int min = mc->min;
2981 int val = snd_soc_read(codec, reg);
2982
2983 ucontrol->value.integer.value[0] =
2984 ((signed char)(val & 0xff))-min;
2985 ucontrol->value.integer.value[1] =
2986 ((signed char)((val >> 8) & 0xff))-min;
2987 return 0;
2988 }
2989 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2990
2991 /**
2992 * snd_soc_put_volsw_sgn - signed mixer put callback
2993 * @kcontrol: mixer control
2994 * @ucontrol: control element information
2995 *
2996 * Callback to set the value of a signed mixer control.
2997 *
2998 * Returns 0 for success.
2999 */
3000 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
3001 struct snd_ctl_elem_value *ucontrol)
3002 {
3003 struct soc_mixer_control *mc =
3004 (struct soc_mixer_control *)kcontrol->private_value;
3005 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3006 unsigned int reg = mc->reg;
3007 int min = mc->min;
3008 unsigned int val;
3009
3010 val = (ucontrol->value.integer.value[0]+min) & 0xff;
3011 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3012
3013 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3014 }
3015 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3016
3017 /**
3018 * snd_soc_info_volsw_range - single mixer info callback with range.
3019 * @kcontrol: mixer control
3020 * @uinfo: control element information
3021 *
3022 * Callback to provide information, within a range, about a single
3023 * mixer control.
3024 *
3025 * returns 0 for success.
3026 */
3027 int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
3028 struct snd_ctl_elem_info *uinfo)
3029 {
3030 struct soc_mixer_control *mc =
3031 (struct soc_mixer_control *)kcontrol->private_value;
3032 int platform_max;
3033 int min = mc->min;
3034
3035 if (!mc->platform_max)
3036 mc->platform_max = mc->max;
3037 platform_max = mc->platform_max;
3038
3039 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3040 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
3041 uinfo->value.integer.min = 0;
3042 uinfo->value.integer.max = platform_max - min;
3043
3044 return 0;
3045 }
3046 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
3047
3048 /**
3049 * snd_soc_put_volsw_range - single mixer put value callback with range.
3050 * @kcontrol: mixer control
3051 * @ucontrol: control element information
3052 *
3053 * Callback to set the value, within a range, for a single mixer control.
3054 *
3055 * Returns 0 for success.
3056 */
3057 int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
3058 struct snd_ctl_elem_value *ucontrol)
3059 {
3060 struct soc_mixer_control *mc =
3061 (struct soc_mixer_control *)kcontrol->private_value;
3062 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3063 unsigned int reg = mc->reg;
3064 unsigned int rreg = mc->rreg;
3065 unsigned int shift = mc->shift;
3066 int min = mc->min;
3067 int max = mc->max;
3068 unsigned int mask = (1 << fls(max)) - 1;
3069 unsigned int invert = mc->invert;
3070 unsigned int val, val_mask;
3071 int ret;
3072
3073 val = ((ucontrol->value.integer.value[0] + min) & mask);
3074 if (invert)
3075 val = max - val;
3076 val_mask = mask << shift;
3077 val = val << shift;
3078
3079 ret = snd_soc_update_bits_locked(codec, reg, val_mask, val);
3080 if (ret < 0)
3081 return ret;
3082
3083 if (snd_soc_volsw_is_stereo(mc)) {
3084 val = ((ucontrol->value.integer.value[1] + min) & mask);
3085 if (invert)
3086 val = max - val;
3087 val_mask = mask << shift;
3088 val = val << shift;
3089
3090 ret = snd_soc_update_bits_locked(codec, rreg, val_mask, val);
3091 }
3092
3093 return ret;
3094 }
3095 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
3096
3097 /**
3098 * snd_soc_get_volsw_range - single mixer get callback with range
3099 * @kcontrol: mixer control
3100 * @ucontrol: control element information
3101 *
3102 * Callback to get the value, within a range, of a single mixer control.
3103 *
3104 * Returns 0 for success.
3105 */
3106 int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
3107 struct snd_ctl_elem_value *ucontrol)
3108 {
3109 struct soc_mixer_control *mc =
3110 (struct soc_mixer_control *)kcontrol->private_value;
3111 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3112 unsigned int reg = mc->reg;
3113 unsigned int rreg = mc->rreg;
3114 unsigned int shift = mc->shift;
3115 int min = mc->min;
3116 int max = mc->max;
3117 unsigned int mask = (1 << fls(max)) - 1;
3118 unsigned int invert = mc->invert;
3119
3120 ucontrol->value.integer.value[0] =
3121 (snd_soc_read(codec, reg) >> shift) & mask;
3122 if (invert)
3123 ucontrol->value.integer.value[0] =
3124 max - ucontrol->value.integer.value[0];
3125 ucontrol->value.integer.value[0] =
3126 ucontrol->value.integer.value[0] - min;
3127
3128 if (snd_soc_volsw_is_stereo(mc)) {
3129 ucontrol->value.integer.value[1] =
3130 (snd_soc_read(codec, rreg) >> shift) & mask;
3131 if (invert)
3132 ucontrol->value.integer.value[1] =
3133 max - ucontrol->value.integer.value[1];
3134 ucontrol->value.integer.value[1] =
3135 ucontrol->value.integer.value[1] - min;
3136 }
3137
3138 return 0;
3139 }
3140 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
3141
3142 /**
3143 * snd_soc_limit_volume - Set new limit to an existing volume control.
3144 *
3145 * @codec: where to look for the control
3146 * @name: Name of the control
3147 * @max: new maximum limit
3148 *
3149 * Return 0 for success, else error.
3150 */
3151 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3152 const char *name, int max)
3153 {
3154 struct snd_card *card = codec->card->snd_card;
3155 struct snd_kcontrol *kctl;
3156 struct soc_mixer_control *mc;
3157 int found = 0;
3158 int ret = -EINVAL;
3159
3160 /* Sanity check for name and max */
3161 if (unlikely(!name || max <= 0))
3162 return -EINVAL;
3163
3164 list_for_each_entry(kctl, &card->controls, list) {
3165 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3166 found = 1;
3167 break;
3168 }
3169 }
3170 if (found) {
3171 mc = (struct soc_mixer_control *)kctl->private_value;
3172 if (max <= mc->max) {
3173 mc->platform_max = max;
3174 ret = 0;
3175 }
3176 }
3177 return ret;
3178 }
3179 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3180
3181 int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
3182 struct snd_ctl_elem_info *uinfo)
3183 {
3184 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3185 struct soc_bytes *params = (void *)kcontrol->private_value;
3186
3187 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3188 uinfo->count = params->num_regs * codec->val_bytes;
3189
3190 return 0;
3191 }
3192 EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
3193
3194 int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
3195 struct snd_ctl_elem_value *ucontrol)
3196 {
3197 struct soc_bytes *params = (void *)kcontrol->private_value;
3198 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3199 int ret;
3200
3201 if (codec->using_regmap)
3202 ret = regmap_raw_read(codec->control_data, params->base,
3203 ucontrol->value.bytes.data,
3204 params->num_regs * codec->val_bytes);
3205 else
3206 ret = -EINVAL;
3207
3208 /* Hide any masked bytes to ensure consistent data reporting */
3209 if (ret == 0 && params->mask) {
3210 switch (codec->val_bytes) {
3211 case 1:
3212 ucontrol->value.bytes.data[0] &= ~params->mask;
3213 break;
3214 case 2:
3215 ((u16 *)(&ucontrol->value.bytes.data))[0]
3216 &= cpu_to_be16(~params->mask);
3217 break;
3218 case 4:
3219 ((u32 *)(&ucontrol->value.bytes.data))[0]
3220 &= cpu_to_be32(~params->mask);
3221 break;
3222 default:
3223 return -EINVAL;
3224 }
3225 }
3226
3227 return ret;
3228 }
3229 EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
3230
3231 int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
3232 struct snd_ctl_elem_value *ucontrol)
3233 {
3234 struct soc_bytes *params = (void *)kcontrol->private_value;
3235 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3236 int ret, len;
3237 unsigned int val;
3238 void *data;
3239
3240 if (!codec->using_regmap)
3241 return -EINVAL;
3242
3243 len = params->num_regs * codec->val_bytes;
3244
3245 data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
3246 if (!data)
3247 return -ENOMEM;
3248
3249 /*
3250 * If we've got a mask then we need to preserve the register
3251 * bits. We shouldn't modify the incoming data so take a
3252 * copy.
3253 */
3254 if (params->mask) {
3255 ret = regmap_read(codec->control_data, params->base, &val);
3256 if (ret != 0)
3257 goto out;
3258
3259 val &= params->mask;
3260
3261 switch (codec->val_bytes) {
3262 case 1:
3263 ((u8 *)data)[0] &= ~params->mask;
3264 ((u8 *)data)[0] |= val;
3265 break;
3266 case 2:
3267 ((u16 *)data)[0] &= cpu_to_be16(~params->mask);
3268 ((u16 *)data)[0] |= cpu_to_be16(val);
3269 break;
3270 case 4:
3271 ((u32 *)data)[0] &= cpu_to_be32(~params->mask);
3272 ((u32 *)data)[0] |= cpu_to_be32(val);
3273 break;
3274 default:
3275 ret = -EINVAL;
3276 goto out;
3277 }
3278 }
3279
3280 ret = regmap_raw_write(codec->control_data, params->base,
3281 data, len);
3282
3283 out:
3284 kfree(data);
3285
3286 return ret;
3287 }
3288 EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
3289
3290 /**
3291 * snd_soc_info_xr_sx - signed multi register info callback
3292 * @kcontrol: mreg control
3293 * @uinfo: control element information
3294 *
3295 * Callback to provide information of a control that can
3296 * span multiple codec registers which together
3297 * forms a single signed value in a MSB/LSB manner.
3298 *
3299 * Returns 0 for success.
3300 */
3301 int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
3302 struct snd_ctl_elem_info *uinfo)
3303 {
3304 struct soc_mreg_control *mc =
3305 (struct soc_mreg_control *)kcontrol->private_value;
3306 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3307 uinfo->count = 1;
3308 uinfo->value.integer.min = mc->min;
3309 uinfo->value.integer.max = mc->max;
3310
3311 return 0;
3312 }
3313 EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
3314
3315 /**
3316 * snd_soc_get_xr_sx - signed multi register get callback
3317 * @kcontrol: mreg control
3318 * @ucontrol: control element information
3319 *
3320 * Callback to get the value of a control that can span
3321 * multiple codec registers which together forms a single
3322 * signed value in a MSB/LSB manner. The control supports
3323 * specifying total no of bits used to allow for bitfields
3324 * across the multiple codec registers.
3325 *
3326 * Returns 0 for success.
3327 */
3328 int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
3329 struct snd_ctl_elem_value *ucontrol)
3330 {
3331 struct soc_mreg_control *mc =
3332 (struct soc_mreg_control *)kcontrol->private_value;
3333 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3334 unsigned int regbase = mc->regbase;
3335 unsigned int regcount = mc->regcount;
3336 unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3337 unsigned int regwmask = (1<<regwshift)-1;
3338 unsigned int invert = mc->invert;
3339 unsigned long mask = (1UL<<mc->nbits)-1;
3340 long min = mc->min;
3341 long max = mc->max;
3342 long val = 0;
3343 unsigned long regval;
3344 unsigned int i;
3345
3346 for (i = 0; i < regcount; i++) {
3347 regval = snd_soc_read(codec, regbase+i) & regwmask;
3348 val |= regval << (regwshift*(regcount-i-1));
3349 }
3350 val &= mask;
3351 if (min < 0 && val > max)
3352 val |= ~mask;
3353 if (invert)
3354 val = max - val;
3355 ucontrol->value.integer.value[0] = val;
3356
3357 return 0;
3358 }
3359 EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3360
3361 /**
3362 * snd_soc_put_xr_sx - signed multi register get callback
3363 * @kcontrol: mreg control
3364 * @ucontrol: control element information
3365 *
3366 * Callback to set the value of a control that can span
3367 * multiple codec registers which together forms a single
3368 * signed value in a MSB/LSB manner. The control supports
3369 * specifying total no of bits used to allow for bitfields
3370 * across the multiple codec registers.
3371 *
3372 * Returns 0 for success.
3373 */
3374 int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3375 struct snd_ctl_elem_value *ucontrol)
3376 {
3377 struct soc_mreg_control *mc =
3378 (struct soc_mreg_control *)kcontrol->private_value;
3379 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3380 unsigned int regbase = mc->regbase;
3381 unsigned int regcount = mc->regcount;
3382 unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3383 unsigned int regwmask = (1<<regwshift)-1;
3384 unsigned int invert = mc->invert;
3385 unsigned long mask = (1UL<<mc->nbits)-1;
3386 long max = mc->max;
3387 long val = ucontrol->value.integer.value[0];
3388 unsigned int i, regval, regmask;
3389 int err;
3390
3391 if (invert)
3392 val = max - val;
3393 val &= mask;
3394 for (i = 0; i < regcount; i++) {
3395 regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3396 regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3397 err = snd_soc_update_bits_locked(codec, regbase+i,
3398 regmask, regval);
3399 if (err < 0)
3400 return err;
3401 }
3402
3403 return 0;
3404 }
3405 EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3406
3407 /**
3408 * snd_soc_get_strobe - strobe get callback
3409 * @kcontrol: mixer control
3410 * @ucontrol: control element information
3411 *
3412 * Callback get the value of a strobe mixer control.
3413 *
3414 * Returns 0 for success.
3415 */
3416 int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3417 struct snd_ctl_elem_value *ucontrol)
3418 {
3419 struct soc_mixer_control *mc =
3420 (struct soc_mixer_control *)kcontrol->private_value;
3421 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3422 unsigned int reg = mc->reg;
3423 unsigned int shift = mc->shift;
3424 unsigned int mask = 1 << shift;
3425 unsigned int invert = mc->invert != 0;
3426 unsigned int val = snd_soc_read(codec, reg) & mask;
3427
3428 if (shift != 0 && val != 0)
3429 val = val >> shift;
3430 ucontrol->value.enumerated.item[0] = val ^ invert;
3431
3432 return 0;
3433 }
3434 EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3435
3436 /**
3437 * snd_soc_put_strobe - strobe put callback
3438 * @kcontrol: mixer control
3439 * @ucontrol: control element information
3440 *
3441 * Callback strobe a register bit to high then low (or the inverse)
3442 * in one pass of a single mixer enum control.
3443 *
3444 * Returns 1 for success.
3445 */
3446 int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3447 struct snd_ctl_elem_value *ucontrol)
3448 {
3449 struct soc_mixer_control *mc =
3450 (struct soc_mixer_control *)kcontrol->private_value;
3451 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3452 unsigned int reg = mc->reg;
3453 unsigned int shift = mc->shift;
3454 unsigned int mask = 1 << shift;
3455 unsigned int invert = mc->invert != 0;
3456 unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3457 unsigned int val1 = (strobe ^ invert) ? mask : 0;
3458 unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3459 int err;
3460
3461 err = snd_soc_update_bits_locked(codec, reg, mask, val1);
3462 if (err < 0)
3463 return err;
3464
3465 err = snd_soc_update_bits_locked(codec, reg, mask, val2);
3466 return err;
3467 }
3468 EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3469
3470 /**
3471 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3472 * @dai: DAI
3473 * @clk_id: DAI specific clock ID
3474 * @freq: new clock frequency in Hz
3475 * @dir: new clock direction - input/output.
3476 *
3477 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3478 */
3479 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3480 unsigned int freq, int dir)
3481 {
3482 if (dai->driver && dai->driver->ops->set_sysclk)
3483 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3484 else if (dai->codec && dai->codec->driver->set_sysclk)
3485 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3486 freq, dir);
3487 else
3488 return -ENOTSUPP;
3489 }
3490 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3491
3492 /**
3493 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3494 * @codec: CODEC
3495 * @clk_id: DAI specific clock ID
3496 * @source: Source for the clock
3497 * @freq: new clock frequency in Hz
3498 * @dir: new clock direction - input/output.
3499 *
3500 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3501 */
3502 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3503 int source, unsigned int freq, int dir)
3504 {
3505 if (codec->driver->set_sysclk)
3506 return codec->driver->set_sysclk(codec, clk_id, source,
3507 freq, dir);
3508 else
3509 return -ENOTSUPP;
3510 }
3511 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3512
3513 /**
3514 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3515 * @dai: DAI
3516 * @div_id: DAI specific clock divider ID
3517 * @div: new clock divisor.
3518 *
3519 * Configures the clock dividers. This is used to derive the best DAI bit and
3520 * frame clocks from the system or master clock. It's best to set the DAI bit
3521 * and frame clocks as low as possible to save system power.
3522 */
3523 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3524 int div_id, int div)
3525 {
3526 if (dai->driver && dai->driver->ops->set_clkdiv)
3527 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3528 else
3529 return -EINVAL;
3530 }
3531 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3532
3533 /**
3534 * snd_soc_dai_set_pll - configure DAI PLL.
3535 * @dai: DAI
3536 * @pll_id: DAI specific PLL ID
3537 * @source: DAI specific source for the PLL
3538 * @freq_in: PLL input clock frequency in Hz
3539 * @freq_out: requested PLL output clock frequency in Hz
3540 *
3541 * Configures and enables PLL to generate output clock based on input clock.
3542 */
3543 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3544 unsigned int freq_in, unsigned int freq_out)
3545 {
3546 if (dai->driver && dai->driver->ops->set_pll)
3547 return dai->driver->ops->set_pll(dai, pll_id, source,
3548 freq_in, freq_out);
3549 else if (dai->codec && dai->codec->driver->set_pll)
3550 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3551 freq_in, freq_out);
3552 else
3553 return -EINVAL;
3554 }
3555 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3556
3557 /*
3558 * snd_soc_codec_set_pll - configure codec PLL.
3559 * @codec: CODEC
3560 * @pll_id: DAI specific PLL ID
3561 * @source: DAI specific source for the PLL
3562 * @freq_in: PLL input clock frequency in Hz
3563 * @freq_out: requested PLL output clock frequency in Hz
3564 *
3565 * Configures and enables PLL to generate output clock based on input clock.
3566 */
3567 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3568 unsigned int freq_in, unsigned int freq_out)
3569 {
3570 if (codec->driver->set_pll)
3571 return codec->driver->set_pll(codec, pll_id, source,
3572 freq_in, freq_out);
3573 else
3574 return -EINVAL;
3575 }
3576 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3577
3578 /**
3579 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
3580 * @dai: DAI
3581 * @ratio Ratio of BCLK to Sample rate.
3582 *
3583 * Configures the DAI for a preset BCLK to sample rate ratio.
3584 */
3585 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
3586 {
3587 if (dai->driver && dai->driver->ops->set_bclk_ratio)
3588 return dai->driver->ops->set_bclk_ratio(dai, ratio);
3589 else
3590 return -EINVAL;
3591 }
3592 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
3593
3594 /**
3595 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3596 * @dai: DAI
3597 * @fmt: SND_SOC_DAIFMT_ format value.
3598 *
3599 * Configures the DAI hardware format and clocking.
3600 */
3601 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3602 {
3603 if (dai->driver == NULL)
3604 return -EINVAL;
3605 if (dai->driver->ops->set_fmt == NULL)
3606 return -ENOTSUPP;
3607 return dai->driver->ops->set_fmt(dai, fmt);
3608 }
3609 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3610
3611 /**
3612 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3613 * @dai: DAI
3614 * @tx_mask: bitmask representing active TX slots.
3615 * @rx_mask: bitmask representing active RX slots.
3616 * @slots: Number of slots in use.
3617 * @slot_width: Width in bits for each slot.
3618 *
3619 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3620 * specific.
3621 */
3622 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3623 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3624 {
3625 if (dai->driver && dai->driver->ops->set_tdm_slot)
3626 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3627 slots, slot_width);
3628 else
3629 return -EINVAL;
3630 }
3631 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3632
3633 /**
3634 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3635 * @dai: DAI
3636 * @tx_num: how many TX channels
3637 * @tx_slot: pointer to an array which imply the TX slot number channel
3638 * 0~num-1 uses
3639 * @rx_num: how many RX channels
3640 * @rx_slot: pointer to an array which imply the RX slot number channel
3641 * 0~num-1 uses
3642 *
3643 * configure the relationship between channel number and TDM slot number.
3644 */
3645 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3646 unsigned int tx_num, unsigned int *tx_slot,
3647 unsigned int rx_num, unsigned int *rx_slot)
3648 {
3649 if (dai->driver && dai->driver->ops->set_channel_map)
3650 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3651 rx_num, rx_slot);
3652 else
3653 return -EINVAL;
3654 }
3655 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3656
3657 /**
3658 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3659 * @dai: DAI
3660 * @tristate: tristate enable
3661 *
3662 * Tristates the DAI so that others can use it.
3663 */
3664 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3665 {
3666 if (dai->driver && dai->driver->ops->set_tristate)
3667 return dai->driver->ops->set_tristate(dai, tristate);
3668 else
3669 return -EINVAL;
3670 }
3671 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3672
3673 /**
3674 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3675 * @dai: DAI
3676 * @mute: mute enable
3677 * @direction: stream to mute
3678 *
3679 * Mutes the DAI DAC.
3680 */
3681 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
3682 int direction)
3683 {
3684 if (!dai->driver)
3685 return -ENOTSUPP;
3686
3687 if (dai->driver->ops->mute_stream)
3688 return dai->driver->ops->mute_stream(dai, mute, direction);
3689 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
3690 dai->driver->ops->digital_mute)
3691 return dai->driver->ops->digital_mute(dai, mute);
3692 else
3693 return -ENOTSUPP;
3694 }
3695 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3696
3697 /**
3698 * snd_soc_register_card - Register a card with the ASoC core
3699 *
3700 * @card: Card to register
3701 *
3702 */
3703 int snd_soc_register_card(struct snd_soc_card *card)
3704 {
3705 int i, ret;
3706
3707 if (!card->name || !card->dev)
3708 return -EINVAL;
3709
3710 for (i = 0; i < card->num_links; i++) {
3711 struct snd_soc_dai_link *link = &card->dai_link[i];
3712
3713 /*
3714 * Codec must be specified by 1 of name or OF node,
3715 * not both or neither.
3716 */
3717 if (!!link->codec_name == !!link->codec_of_node) {
3718 dev_err(card->dev,
3719 "ASoC: Neither/both codec name/of_node are set for %s\n",
3720 link->name);
3721 return -EINVAL;
3722 }
3723 /* Codec DAI name must be specified */
3724 if (!link->codec_dai_name) {
3725 dev_err(card->dev,
3726 "ASoC: codec_dai_name not set for %s\n",
3727 link->name);
3728 return -EINVAL;
3729 }
3730
3731 /*
3732 * Platform may be specified by either name or OF node, but
3733 * can be left unspecified, and a dummy platform will be used.
3734 */
3735 if (link->platform_name && link->platform_of_node) {
3736 dev_err(card->dev,
3737 "ASoC: Both platform name/of_node are set for %s\n",
3738 link->name);
3739 return -EINVAL;
3740 }
3741
3742 /*
3743 * CPU device may be specified by either name or OF node, but
3744 * can be left unspecified, and will be matched based on DAI
3745 * name alone..
3746 */
3747 if (link->cpu_name && link->cpu_of_node) {
3748 dev_err(card->dev,
3749 "ASoC: Neither/both cpu name/of_node are set for %s\n",
3750 link->name);
3751 return -EINVAL;
3752 }
3753 /*
3754 * At least one of CPU DAI name or CPU device name/node must be
3755 * specified
3756 */
3757 if (!link->cpu_dai_name &&
3758 !(link->cpu_name || link->cpu_of_node)) {
3759 dev_err(card->dev,
3760 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
3761 link->name);
3762 return -EINVAL;
3763 }
3764 }
3765
3766 dev_set_drvdata(card->dev, card);
3767
3768 snd_soc_initialize_card_lists(card);
3769
3770 soc_init_card_debugfs(card);
3771
3772 card->rtd = devm_kzalloc(card->dev,
3773 sizeof(struct snd_soc_pcm_runtime) *
3774 (card->num_links + card->num_aux_devs),
3775 GFP_KERNEL);
3776 if (card->rtd == NULL)
3777 return -ENOMEM;
3778 card->num_rtd = 0;
3779 card->rtd_aux = &card->rtd[card->num_links];
3780
3781 for (i = 0; i < card->num_links; i++)
3782 card->rtd[i].dai_link = &card->dai_link[i];
3783
3784 INIT_LIST_HEAD(&card->list);
3785 INIT_LIST_HEAD(&card->dapm_dirty);
3786 card->instantiated = 0;
3787 mutex_init(&card->mutex);
3788 mutex_init(&card->dapm_mutex);
3789
3790 ret = snd_soc_instantiate_card(card);
3791 if (ret != 0)
3792 soc_cleanup_card_debugfs(card);
3793
3794 /* deactivate pins to sleep state */
3795 for (i = 0; i < card->num_rtd; i++) {
3796 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
3797 struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
3798 if (!codec_dai->active)
3799 pinctrl_pm_select_sleep_state(codec_dai->dev);
3800 if (!cpu_dai->active)
3801 pinctrl_pm_select_sleep_state(cpu_dai->dev);
3802 }
3803
3804 return ret;
3805 }
3806 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3807
3808 /**
3809 * snd_soc_unregister_card - Unregister a card with the ASoC core
3810 *
3811 * @card: Card to unregister
3812 *
3813 */
3814 int snd_soc_unregister_card(struct snd_soc_card *card)
3815 {
3816 if (card->instantiated)
3817 soc_cleanup_card_resources(card);
3818 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3819
3820 return 0;
3821 }
3822 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3823
3824 /*
3825 * Simplify DAI link configuration by removing ".-1" from device names
3826 * and sanitizing names.
3827 */
3828 static char *fmt_single_name(struct device *dev, int *id)
3829 {
3830 char *found, name[NAME_SIZE];
3831 int id1, id2;
3832
3833 if (dev_name(dev) == NULL)
3834 return NULL;
3835
3836 strlcpy(name, dev_name(dev), NAME_SIZE);
3837
3838 /* are we a "%s.%d" name (platform and SPI components) */
3839 found = strstr(name, dev->driver->name);
3840 if (found) {
3841 /* get ID */
3842 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3843
3844 /* discard ID from name if ID == -1 */
3845 if (*id == -1)
3846 found[strlen(dev->driver->name)] = '\0';
3847 }
3848
3849 } else {
3850 /* I2C component devices are named "bus-addr" */
3851 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3852 char tmp[NAME_SIZE];
3853
3854 /* create unique ID number from I2C addr and bus */
3855 *id = ((id1 & 0xffff) << 16) + id2;
3856
3857 /* sanitize component name for DAI link creation */
3858 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3859 strlcpy(name, tmp, NAME_SIZE);
3860 } else
3861 *id = 0;
3862 }
3863
3864 return kstrdup(name, GFP_KERNEL);
3865 }
3866
3867 /*
3868 * Simplify DAI link naming for single devices with multiple DAIs by removing
3869 * any ".-1" and using the DAI name (instead of device name).
3870 */
3871 static inline char *fmt_multiple_name(struct device *dev,
3872 struct snd_soc_dai_driver *dai_drv)
3873 {
3874 if (dai_drv->name == NULL) {
3875 dev_err(dev,
3876 "ASoC: error - multiple DAI %s registered with no name\n",
3877 dev_name(dev));
3878 return NULL;
3879 }
3880
3881 return kstrdup(dai_drv->name, GFP_KERNEL);
3882 }
3883
3884 /**
3885 * snd_soc_register_dai - Register a DAI with the ASoC core
3886 *
3887 * @dai: DAI to register
3888 */
3889 static int snd_soc_register_dai(struct device *dev,
3890 struct snd_soc_dai_driver *dai_drv)
3891 {
3892 struct snd_soc_codec *codec;
3893 struct snd_soc_dai *dai;
3894
3895 dev_dbg(dev, "ASoC: dai register %s\n", dev_name(dev));
3896
3897 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3898 if (dai == NULL)
3899 return -ENOMEM;
3900
3901 /* create DAI component name */
3902 dai->name = fmt_single_name(dev, &dai->id);
3903 if (dai->name == NULL) {
3904 kfree(dai);
3905 return -ENOMEM;
3906 }
3907
3908 dai->dev = dev;
3909 dai->driver = dai_drv;
3910 dai->dapm.dev = dev;
3911 if (!dai->driver->ops)
3912 dai->driver->ops = &null_dai_ops;
3913
3914 mutex_lock(&client_mutex);
3915
3916 list_for_each_entry(codec, &codec_list, list) {
3917 if (codec->dev == dev) {
3918 dev_dbg(dev, "ASoC: Mapped DAI %s to CODEC %s\n",
3919 dai->name, codec->name);
3920 dai->codec = codec;
3921 break;
3922 }
3923 }
3924
3925 if (!dai->codec)
3926 dai->dapm.idle_bias_off = 1;
3927
3928 list_add(&dai->list, &dai_list);
3929
3930 mutex_unlock(&client_mutex);
3931
3932 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3933
3934 return 0;
3935 }
3936
3937 /**
3938 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3939 *
3940 * @dai: DAI to unregister
3941 */
3942 static void snd_soc_unregister_dai(struct device *dev)
3943 {
3944 struct snd_soc_dai *dai;
3945
3946 list_for_each_entry(dai, &dai_list, list) {
3947 if (dev == dai->dev)
3948 goto found;
3949 }
3950 return;
3951
3952 found:
3953 mutex_lock(&client_mutex);
3954 list_del(&dai->list);
3955 mutex_unlock(&client_mutex);
3956
3957 dev_dbg(dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
3958 kfree(dai->name);
3959 kfree(dai);
3960 }
3961
3962 /**
3963 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3964 *
3965 * @dai: Array of DAIs to register
3966 * @count: Number of DAIs
3967 */
3968 static int snd_soc_register_dais(struct device *dev,
3969 struct snd_soc_dai_driver *dai_drv, size_t count)
3970 {
3971 struct snd_soc_codec *codec;
3972 struct snd_soc_dai *dai;
3973 int i, ret = 0;
3974
3975 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
3976
3977 for (i = 0; i < count; i++) {
3978
3979 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3980 if (dai == NULL) {
3981 ret = -ENOMEM;
3982 goto err;
3983 }
3984
3985 /* create DAI component name */
3986 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3987 if (dai->name == NULL) {
3988 kfree(dai);
3989 ret = -EINVAL;
3990 goto err;
3991 }
3992
3993 dai->dev = dev;
3994 dai->driver = &dai_drv[i];
3995 if (dai->driver->id)
3996 dai->id = dai->driver->id;
3997 else
3998 dai->id = i;
3999 dai->dapm.dev = dev;
4000 if (!dai->driver->ops)
4001 dai->driver->ops = &null_dai_ops;
4002
4003 mutex_lock(&client_mutex);
4004
4005 list_for_each_entry(codec, &codec_list, list) {
4006 if (codec->dev == dev) {
4007 dev_dbg(dev,
4008 "ASoC: Mapped DAI %s to CODEC %s\n",
4009 dai->name, codec->name);
4010 dai->codec = codec;
4011 break;
4012 }
4013 }
4014
4015 if (!dai->codec)
4016 dai->dapm.idle_bias_off = 1;
4017
4018 list_add(&dai->list, &dai_list);
4019
4020 mutex_unlock(&client_mutex);
4021
4022 dev_dbg(dai->dev, "ASoC: Registered DAI '%s'\n", dai->name);
4023 }
4024
4025 return 0;
4026
4027 err:
4028 for (i--; i >= 0; i--)
4029 snd_soc_unregister_dai(dev);
4030
4031 return ret;
4032 }
4033
4034 /**
4035 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
4036 *
4037 * @dai: Array of DAIs to unregister
4038 * @count: Number of DAIs
4039 */
4040 static void snd_soc_unregister_dais(struct device *dev, size_t count)
4041 {
4042 int i;
4043
4044 for (i = 0; i < count; i++)
4045 snd_soc_unregister_dai(dev);
4046 }
4047
4048 /**
4049 * snd_soc_register_component - Register a component with the ASoC core
4050 *
4051 */
4052 static int
4053 __snd_soc_register_component(struct device *dev,
4054 struct snd_soc_component *cmpnt,
4055 const struct snd_soc_component_driver *cmpnt_drv,
4056 struct snd_soc_dai_driver *dai_drv,
4057 int num_dai, bool allow_single_dai)
4058 {
4059 int ret;
4060
4061 dev_dbg(dev, "component register %s\n", dev_name(dev));
4062
4063 if (!cmpnt) {
4064 dev_err(dev, "ASoC: Failed to connecting component\n");
4065 return -ENOMEM;
4066 }
4067
4068 cmpnt->name = fmt_single_name(dev, &cmpnt->id);
4069 if (!cmpnt->name) {
4070 dev_err(dev, "ASoC: Failed to simplifying name\n");
4071 return -ENOMEM;
4072 }
4073
4074 cmpnt->dev = dev;
4075 cmpnt->driver = cmpnt_drv;
4076 cmpnt->dai_drv = dai_drv;
4077 cmpnt->num_dai = num_dai;
4078
4079 /*
4080 * snd_soc_register_dai() uses fmt_single_name(), and
4081 * snd_soc_register_dais() uses fmt_multiple_name()
4082 * for dai->name which is used for name based matching
4083 *
4084 * this function is used from cpu/codec.
4085 * allow_single_dai flag can ignore "codec" driver reworking
4086 * since it had been used snd_soc_register_dais(),
4087 */
4088 if ((1 == num_dai) && allow_single_dai)
4089 ret = snd_soc_register_dai(dev, dai_drv);
4090 else
4091 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4092 if (ret < 0) {
4093 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4094 goto error_component_name;
4095 }
4096
4097 mutex_lock(&client_mutex);
4098 list_add(&cmpnt->list, &component_list);
4099 mutex_unlock(&client_mutex);
4100
4101 dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);
4102
4103 return ret;
4104
4105 error_component_name:
4106 kfree(cmpnt->name);
4107
4108 return ret;
4109 }
4110
4111 int snd_soc_register_component(struct device *dev,
4112 const struct snd_soc_component_driver *cmpnt_drv,
4113 struct snd_soc_dai_driver *dai_drv,
4114 int num_dai)
4115 {
4116 struct snd_soc_component *cmpnt;
4117
4118 cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
4119 if (!cmpnt) {
4120 dev_err(dev, "ASoC: Failed to allocate memory\n");
4121 return -ENOMEM;
4122 }
4123
4124 return __snd_soc_register_component(dev, cmpnt, cmpnt_drv,
4125 dai_drv, num_dai, true);
4126 }
4127 EXPORT_SYMBOL_GPL(snd_soc_register_component);
4128
4129 /**
4130 * snd_soc_unregister_component - Unregister a component from the ASoC core
4131 *
4132 */
4133 void snd_soc_unregister_component(struct device *dev)
4134 {
4135 struct snd_soc_component *cmpnt;
4136
4137 list_for_each_entry(cmpnt, &component_list, list) {
4138 if (dev == cmpnt->dev)
4139 goto found;
4140 }
4141 return;
4142
4143 found:
4144 snd_soc_unregister_dais(dev, cmpnt->num_dai);
4145
4146 mutex_lock(&client_mutex);
4147 list_del(&cmpnt->list);
4148 mutex_unlock(&client_mutex);
4149
4150 dev_dbg(dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
4151 kfree(cmpnt->name);
4152 }
4153 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
4154
4155 /**
4156 * snd_soc_add_platform - Add a platform to the ASoC core
4157 * @dev: The parent device for the platform
4158 * @platform: The platform to add
4159 * @platform_driver: The driver for the platform
4160 */
4161 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
4162 const struct snd_soc_platform_driver *platform_drv)
4163 {
4164 /* create platform component name */
4165 platform->name = fmt_single_name(dev, &platform->id);
4166 if (platform->name == NULL)
4167 return -ENOMEM;
4168
4169 platform->dev = dev;
4170 platform->driver = platform_drv;
4171 platform->dapm.dev = dev;
4172 platform->dapm.platform = platform;
4173 platform->dapm.stream_event = platform_drv->stream_event;
4174 mutex_init(&platform->mutex);
4175
4176 mutex_lock(&client_mutex);
4177 list_add(&platform->list, &platform_list);
4178 mutex_unlock(&client_mutex);
4179
4180 dev_dbg(dev, "ASoC: Registered platform '%s'\n", platform->name);
4181
4182 return 0;
4183 }
4184 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
4185
4186 /**
4187 * snd_soc_register_platform - Register a platform with the ASoC core
4188 *
4189 * @platform: platform to register
4190 */
4191 int snd_soc_register_platform(struct device *dev,
4192 const struct snd_soc_platform_driver *platform_drv)
4193 {
4194 struct snd_soc_platform *platform;
4195 int ret;
4196
4197 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
4198
4199 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
4200 if (platform == NULL)
4201 return -ENOMEM;
4202
4203 ret = snd_soc_add_platform(dev, platform, platform_drv);
4204 if (ret)
4205 kfree(platform);
4206
4207 return ret;
4208 }
4209 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
4210
4211 /**
4212 * snd_soc_remove_platform - Remove a platform from the ASoC core
4213 * @platform: the platform to remove
4214 */
4215 void snd_soc_remove_platform(struct snd_soc_platform *platform)
4216 {
4217 mutex_lock(&client_mutex);
4218 list_del(&platform->list);
4219 mutex_unlock(&client_mutex);
4220
4221 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
4222 platform->name);
4223 kfree(platform->name);
4224 }
4225 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
4226
4227 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
4228 {
4229 struct snd_soc_platform *platform;
4230
4231 list_for_each_entry(platform, &platform_list, list) {
4232 if (dev == platform->dev)
4233 return platform;
4234 }
4235
4236 return NULL;
4237 }
4238 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
4239
4240 /**
4241 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
4242 *
4243 * @platform: platform to unregister
4244 */
4245 void snd_soc_unregister_platform(struct device *dev)
4246 {
4247 struct snd_soc_platform *platform;
4248
4249 platform = snd_soc_lookup_platform(dev);
4250 if (!platform)
4251 return;
4252
4253 snd_soc_remove_platform(platform);
4254 kfree(platform);
4255 }
4256 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
4257
4258 static u64 codec_format_map[] = {
4259 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
4260 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
4261 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
4262 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
4263 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
4264 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
4265 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4266 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4267 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
4268 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
4269 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
4270 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
4271 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
4272 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
4273 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
4274 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
4275 };
4276
4277 /* Fix up the DAI formats for endianness: codecs don't actually see
4278 * the endianness of the data but we're using the CPU format
4279 * definitions which do need to include endianness so we ensure that
4280 * codec DAIs always have both big and little endian variants set.
4281 */
4282 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
4283 {
4284 int i;
4285
4286 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
4287 if (stream->formats & codec_format_map[i])
4288 stream->formats |= codec_format_map[i];
4289 }
4290
4291 /**
4292 * snd_soc_register_codec - Register a codec with the ASoC core
4293 *
4294 * @codec: codec to register
4295 */
4296 int snd_soc_register_codec(struct device *dev,
4297 const struct snd_soc_codec_driver *codec_drv,
4298 struct snd_soc_dai_driver *dai_drv,
4299 int num_dai)
4300 {
4301 struct snd_soc_codec *codec;
4302 int ret, i;
4303
4304 dev_dbg(dev, "codec register %s\n", dev_name(dev));
4305
4306 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
4307 if (codec == NULL)
4308 return -ENOMEM;
4309
4310 /* create CODEC component name */
4311 codec->name = fmt_single_name(dev, &codec->id);
4312 if (codec->name == NULL) {
4313 ret = -ENOMEM;
4314 goto fail_codec;
4315 }
4316
4317 codec->write = codec_drv->write;
4318 codec->read = codec_drv->read;
4319 codec->volatile_register = codec_drv->volatile_register;
4320 codec->readable_register = codec_drv->readable_register;
4321 codec->writable_register = codec_drv->writable_register;
4322 codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
4323 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
4324 codec->dapm.dev = dev;
4325 codec->dapm.codec = codec;
4326 codec->dapm.seq_notifier = codec_drv->seq_notifier;
4327 codec->dapm.stream_event = codec_drv->stream_event;
4328 codec->dev = dev;
4329 codec->driver = codec_drv;
4330 codec->num_dai = num_dai;
4331 mutex_init(&codec->mutex);
4332
4333 for (i = 0; i < num_dai; i++) {
4334 fixup_codec_formats(&dai_drv[i].playback);
4335 fixup_codec_formats(&dai_drv[i].capture);
4336 }
4337
4338 mutex_lock(&client_mutex);
4339 list_add(&codec->list, &codec_list);
4340 mutex_unlock(&client_mutex);
4341
4342 /* register component */
4343 ret = __snd_soc_register_component(dev, &codec->component,
4344 &codec_drv->component_driver,
4345 dai_drv, num_dai, false);
4346 if (ret < 0) {
4347 dev_err(codec->dev, "ASoC: Failed to regster component: %d\n", ret);
4348 goto fail_codec_name;
4349 }
4350
4351 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", codec->name);
4352 return 0;
4353
4354 fail_codec_name:
4355 mutex_lock(&client_mutex);
4356 list_del(&codec->list);
4357 mutex_unlock(&client_mutex);
4358
4359 kfree(codec->name);
4360 fail_codec:
4361 kfree(codec);
4362 return ret;
4363 }
4364 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4365
4366 /**
4367 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4368 *
4369 * @codec: codec to unregister
4370 */
4371 void snd_soc_unregister_codec(struct device *dev)
4372 {
4373 struct snd_soc_codec *codec;
4374
4375 list_for_each_entry(codec, &codec_list, list) {
4376 if (dev == codec->dev)
4377 goto found;
4378 }
4379 return;
4380
4381 found:
4382 snd_soc_unregister_component(dev);
4383
4384 mutex_lock(&client_mutex);
4385 list_del(&codec->list);
4386 mutex_unlock(&client_mutex);
4387
4388 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
4389
4390 snd_soc_cache_exit(codec);
4391 kfree(codec->name);
4392 kfree(codec);
4393 }
4394 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4395
4396 /* Retrieve a card's name from device tree */
4397 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4398 const char *propname)
4399 {
4400 struct device_node *np = card->dev->of_node;
4401 int ret;
4402
4403 ret = of_property_read_string_index(np, propname, 0, &card->name);
4404 /*
4405 * EINVAL means the property does not exist. This is fine providing
4406 * card->name was previously set, which is checked later in
4407 * snd_soc_register_card.
4408 */
4409 if (ret < 0 && ret != -EINVAL) {
4410 dev_err(card->dev,
4411 "ASoC: Property '%s' could not be read: %d\n",
4412 propname, ret);
4413 return ret;
4414 }
4415
4416 return 0;
4417 }
4418 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4419
4420 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4421 const char *propname)
4422 {
4423 struct device_node *np = card->dev->of_node;
4424 int num_routes;
4425 struct snd_soc_dapm_route *routes;
4426 int i, ret;
4427
4428 num_routes = of_property_count_strings(np, propname);
4429 if (num_routes < 0 || num_routes & 1) {
4430 dev_err(card->dev,
4431 "ASoC: Property '%s' does not exist or its length is not even\n",
4432 propname);
4433 return -EINVAL;
4434 }
4435 num_routes /= 2;
4436 if (!num_routes) {
4437 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4438 propname);
4439 return -EINVAL;
4440 }
4441
4442 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4443 GFP_KERNEL);
4444 if (!routes) {
4445 dev_err(card->dev,
4446 "ASoC: Could not allocate DAPM route table\n");
4447 return -EINVAL;
4448 }
4449
4450 for (i = 0; i < num_routes; i++) {
4451 ret = of_property_read_string_index(np, propname,
4452 2 * i, &routes[i].sink);
4453 if (ret) {
4454 dev_err(card->dev,
4455 "ASoC: Property '%s' index %d could not be read: %d\n",
4456 propname, 2 * i, ret);
4457 return -EINVAL;
4458 }
4459 ret = of_property_read_string_index(np, propname,
4460 (2 * i) + 1, &routes[i].source);
4461 if (ret) {
4462 dev_err(card->dev,
4463 "ASoC: Property '%s' index %d could not be read: %d\n",
4464 propname, (2 * i) + 1, ret);
4465 return -EINVAL;
4466 }
4467 }
4468
4469 card->num_dapm_routes = num_routes;
4470 card->dapm_routes = routes;
4471
4472 return 0;
4473 }
4474 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4475
4476 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4477 const char *prefix)
4478 {
4479 int ret, i;
4480 char prop[128];
4481 unsigned int format = 0;
4482 int bit, frame;
4483 const char *str;
4484 struct {
4485 char *name;
4486 unsigned int val;
4487 } of_fmt_table[] = {
4488 { "i2s", SND_SOC_DAIFMT_I2S },
4489 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
4490 { "left_j", SND_SOC_DAIFMT_LEFT_J },
4491 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
4492 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
4493 { "ac97", SND_SOC_DAIFMT_AC97 },
4494 { "pdm", SND_SOC_DAIFMT_PDM},
4495 { "msb", SND_SOC_DAIFMT_MSB },
4496 { "lsb", SND_SOC_DAIFMT_LSB },
4497 };
4498
4499 if (!prefix)
4500 prefix = "";
4501
4502 /*
4503 * check "[prefix]format = xxx"
4504 * SND_SOC_DAIFMT_FORMAT_MASK area
4505 */
4506 snprintf(prop, sizeof(prop), "%sformat", prefix);
4507 ret = of_property_read_string(np, prop, &str);
4508 if (ret == 0) {
4509 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4510 if (strcmp(str, of_fmt_table[i].name) == 0) {
4511 format |= of_fmt_table[i].val;
4512 break;
4513 }
4514 }
4515 }
4516
4517 /*
4518 * check "[prefix]continuous-clock"
4519 * SND_SOC_DAIFMT_CLOCK_MASK area
4520 */
4521 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4522 if (of_get_property(np, prop, NULL))
4523 format |= SND_SOC_DAIFMT_CONT;
4524 else
4525 format |= SND_SOC_DAIFMT_GATED;
4526
4527 /*
4528 * check "[prefix]bitclock-inversion"
4529 * check "[prefix]frame-inversion"
4530 * SND_SOC_DAIFMT_INV_MASK area
4531 */
4532 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4533 bit = !!of_get_property(np, prop, NULL);
4534
4535 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4536 frame = !!of_get_property(np, prop, NULL);
4537
4538 switch ((bit << 4) + frame) {
4539 case 0x11:
4540 format |= SND_SOC_DAIFMT_IB_IF;
4541 break;
4542 case 0x10:
4543 format |= SND_SOC_DAIFMT_IB_NF;
4544 break;
4545 case 0x01:
4546 format |= SND_SOC_DAIFMT_NB_IF;
4547 break;
4548 default:
4549 /* SND_SOC_DAIFMT_NB_NF is default */
4550 break;
4551 }
4552
4553 /*
4554 * check "[prefix]bitclock-master"
4555 * check "[prefix]frame-master"
4556 * SND_SOC_DAIFMT_MASTER_MASK area
4557 */
4558 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4559 bit = !!of_get_property(np, prop, NULL);
4560
4561 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4562 frame = !!of_get_property(np, prop, NULL);
4563
4564 switch ((bit << 4) + frame) {
4565 case 0x11:
4566 format |= SND_SOC_DAIFMT_CBM_CFM;
4567 break;
4568 case 0x10:
4569 format |= SND_SOC_DAIFMT_CBM_CFS;
4570 break;
4571 case 0x01:
4572 format |= SND_SOC_DAIFMT_CBS_CFM;
4573 break;
4574 default:
4575 format |= SND_SOC_DAIFMT_CBS_CFS;
4576 break;
4577 }
4578
4579 return format;
4580 }
4581 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4582
4583 int snd_soc_of_get_dai_name(struct device_node *of_node,
4584 const char **dai_name)
4585 {
4586 struct snd_soc_component *pos;
4587 struct of_phandle_args args;
4588 int ret;
4589
4590 ret = of_parse_phandle_with_args(of_node, "sound-dai",
4591 "#sound-dai-cells", 0, &args);
4592 if (ret)
4593 return ret;
4594
4595 ret = -EPROBE_DEFER;
4596
4597 mutex_lock(&client_mutex);
4598 list_for_each_entry(pos, &component_list, list) {
4599 if (pos->dev->of_node != args.np)
4600 continue;
4601
4602 if (pos->driver->of_xlate_dai_name) {
4603 ret = pos->driver->of_xlate_dai_name(pos, &args, dai_name);
4604 } else {
4605 int id = -1;
4606
4607 switch (args.args_count) {
4608 case 0:
4609 id = 0; /* same as dai_drv[0] */
4610 break;
4611 case 1:
4612 id = args.args[0];
4613 break;
4614 default:
4615 /* not supported */
4616 break;
4617 }
4618
4619 if (id < 0 || id >= pos->num_dai) {
4620 ret = -EINVAL;
4621 break;
4622 }
4623
4624 ret = 0;
4625
4626 *dai_name = pos->dai_drv[id].name;
4627 if (!*dai_name)
4628 *dai_name = pos->name;
4629 }
4630
4631 break;
4632 }
4633 mutex_unlock(&client_mutex);
4634
4635 of_node_put(args.np);
4636
4637 return ret;
4638 }
4639 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4640
4641 static int __init snd_soc_init(void)
4642 {
4643 #ifdef CONFIG_DEBUG_FS
4644 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4645 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4646 pr_warn("ASoC: Failed to create debugfs directory\n");
4647 snd_soc_debugfs_root = NULL;
4648 }
4649
4650 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4651 &codec_list_fops))
4652 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4653
4654 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4655 &dai_list_fops))
4656 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4657
4658 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4659 &platform_list_fops))
4660 pr_warn("ASoC: Failed to create platform list debugfs file\n");
4661 #endif
4662
4663 snd_soc_util_init();
4664
4665 return platform_driver_register(&soc_driver);
4666 }
4667 module_init(snd_soc_init);
4668
4669 static void __exit snd_soc_exit(void)
4670 {
4671 snd_soc_util_exit();
4672
4673 #ifdef CONFIG_DEBUG_FS
4674 debugfs_remove_recursive(snd_soc_debugfs_root);
4675 #endif
4676 platform_driver_unregister(&soc_driver);
4677 }
4678 module_exit(snd_soc_exit);
4679
4680 /* Module information */
4681 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4682 MODULE_DESCRIPTION("ALSA SoC Core");
4683 MODULE_LICENSE("GPL");
4684 MODULE_ALIAS("platform:soc-audio");
Linux with added FPC-III support