?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
x86/xen: resume timer irqs early
[linux/fpc-iii.git] / sound / soc / soc-core.c
blob1a38be0d0ca8fbf0724bbec4087569ee418d39a2
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 break;
666 default:
667 dev_dbg(codec->dev,
668 "ASoC: CODEC is on over suspend\n");
669 break;
670 }
671 }
672 }
673
674 for (i = 0; i < card->num_rtd; i++) {
675 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
676
677 if (card->rtd[i].dai_link->ignore_suspend)
678 continue;
679
680 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
681 cpu_dai->driver->suspend(cpu_dai);
682 }
683
684 if (card->suspend_post)
685 card->suspend_post(card);
686
687 return 0;
688 }
689 EXPORT_SYMBOL_GPL(snd_soc_suspend);
690
691 /* deferred resume work, so resume can complete before we finished
692 * setting our codec back up, which can be very slow on I2C
693 */
694 static void soc_resume_deferred(struct work_struct *work)
695 {
696 struct snd_soc_card *card =
697 container_of(work, struct snd_soc_card, deferred_resume_work);
698 struct snd_soc_codec *codec;
699 int i;
700
701 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
702 * so userspace apps are blocked from touching us
703 */
704
705 dev_dbg(card->dev, "ASoC: starting resume work\n");
706
707 /* Bring us up into D2 so that DAPM starts enabling things */
708 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
709
710 if (card->resume_pre)
711 card->resume_pre(card);
712
713 /* resume AC97 DAIs */
714 for (i = 0; i < card->num_rtd; i++) {
715 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
716
717 if (card->rtd[i].dai_link->ignore_suspend)
718 continue;
719
720 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
721 cpu_dai->driver->resume(cpu_dai);
722 }
723
724 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
725 /* If the CODEC was idle over suspend then it will have been
726 * left with bias OFF or STANDBY and suspended so we must now
727 * resume. Otherwise the suspend was suppressed.
728 */
729 if (codec->driver->resume && codec->suspended) {
730 switch (codec->dapm.bias_level) {
731 case SND_SOC_BIAS_STANDBY:
732 case SND_SOC_BIAS_OFF:
733 codec->driver->resume(codec);
734 codec->suspended = 0;
735 break;
736 default:
737 dev_dbg(codec->dev,
738 "ASoC: CODEC was on over suspend\n");
739 break;
740 }
741 }
742 }
743
744 for (i = 0; i < card->num_rtd; i++) {
745
746 if (card->rtd[i].dai_link->ignore_suspend)
747 continue;
748
749 snd_soc_dapm_stream_event(&card->rtd[i],
750 SNDRV_PCM_STREAM_PLAYBACK,
751 SND_SOC_DAPM_STREAM_RESUME);
752
753 snd_soc_dapm_stream_event(&card->rtd[i],
754 SNDRV_PCM_STREAM_CAPTURE,
755 SND_SOC_DAPM_STREAM_RESUME);
756 }
757
758 /* unmute any active DACs */
759 for (i = 0; i < card->num_rtd; i++) {
760 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
761 struct snd_soc_dai_driver *drv = dai->driver;
762
763 if (card->rtd[i].dai_link->ignore_suspend)
764 continue;
765
766 if (drv->ops->digital_mute && dai->playback_active)
767 drv->ops->digital_mute(dai, 0);
768 }
769
770 for (i = 0; i < card->num_rtd; i++) {
771 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
772 struct snd_soc_platform *platform = card->rtd[i].platform;
773
774 if (card->rtd[i].dai_link->ignore_suspend)
775 continue;
776
777 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
778 cpu_dai->driver->resume(cpu_dai);
779 if (platform->driver->resume && platform->suspended) {
780 platform->driver->resume(cpu_dai);
781 platform->suspended = 0;
782 }
783 }
784
785 if (card->resume_post)
786 card->resume_post(card);
787
788 dev_dbg(card->dev, "ASoC: resume work completed\n");
789
790 /* userspace can access us now we are back as we were before */
791 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
792
793 /* Recheck all analogue paths too */
794 dapm_mark_io_dirty(&card->dapm);
795 snd_soc_dapm_sync(&card->dapm);
796 }
797
798 /* powers up audio subsystem after a suspend */
799 int snd_soc_resume(struct device *dev)
800 {
801 struct snd_soc_card *card = dev_get_drvdata(dev);
802 int i, ac97_control = 0;
803
804 /* If the initialization of this soc device failed, there is no codec
805 * associated with it. Just bail out in this case.
806 */
807 if (list_empty(&card->codec_dev_list))
808 return 0;
809
810 /* AC97 devices might have other drivers hanging off them so
811 * need to resume immediately. Other drivers don't have that
812 * problem and may take a substantial amount of time to resume
813 * due to I/O costs and anti-pop so handle them out of line.
814 */
815 for (i = 0; i < card->num_rtd; i++) {
816 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
817 ac97_control |= cpu_dai->driver->ac97_control;
818 }
819 if (ac97_control) {
820 dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
821 soc_resume_deferred(&card->deferred_resume_work);
822 } else {
823 dev_dbg(dev, "ASoC: Scheduling resume work\n");
824 if (!schedule_work(&card->deferred_resume_work))
825 dev_err(dev, "ASoC: resume work item may be lost\n");
826 }
827
828 return 0;
829 }
830 EXPORT_SYMBOL_GPL(snd_soc_resume);
831 #else
832 #define snd_soc_suspend NULL
833 #define snd_soc_resume NULL
834 #endif
835
836 static const struct snd_soc_dai_ops null_dai_ops = {
837 };
838
839 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
840 {
841 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
842 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
843 struct snd_soc_codec *codec;
844 struct snd_soc_platform *platform;
845 struct snd_soc_dai *codec_dai, *cpu_dai;
846 const char *platform_name;
847
848 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
849
850 /* Find CPU DAI from registered DAIs*/
851 list_for_each_entry(cpu_dai, &dai_list, list) {
852 if (dai_link->cpu_of_node &&
853 (cpu_dai->dev->of_node != dai_link->cpu_of_node))
854 continue;
855 if (dai_link->cpu_name &&
856 strcmp(dev_name(cpu_dai->dev), dai_link->cpu_name))
857 continue;
858 if (dai_link->cpu_dai_name &&
859 strcmp(cpu_dai->name, dai_link->cpu_dai_name))
860 continue;
861
862 rtd->cpu_dai = cpu_dai;
863 }
864
865 if (!rtd->cpu_dai) {
866 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
867 dai_link->cpu_dai_name);
868 return -EPROBE_DEFER;
869 }
870
871 /* Find CODEC from registered CODECs */
872 list_for_each_entry(codec, &codec_list, list) {
873 if (dai_link->codec_of_node) {
874 if (codec->dev->of_node != dai_link->codec_of_node)
875 continue;
876 } else {
877 if (strcmp(codec->name, dai_link->codec_name))
878 continue;
879 }
880
881 rtd->codec = codec;
882
883 /*
884 * CODEC found, so find CODEC DAI from registered DAIs from
885 * this CODEC
886 */
887 list_for_each_entry(codec_dai, &dai_list, list) {
888 if (codec->dev == codec_dai->dev &&
889 !strcmp(codec_dai->name,
890 dai_link->codec_dai_name)) {
891
892 rtd->codec_dai = codec_dai;
893 }
894 }
895
896 if (!rtd->codec_dai) {
897 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
898 dai_link->codec_dai_name);
899 return -EPROBE_DEFER;
900 }
901 }
902
903 if (!rtd->codec) {
904 dev_err(card->dev, "ASoC: CODEC %s not registered\n",
905 dai_link->codec_name);
906 return -EPROBE_DEFER;
907 }
908
909 /* if there's no platform we match on the empty platform */
910 platform_name = dai_link->platform_name;
911 if (!platform_name && !dai_link->platform_of_node)
912 platform_name = "snd-soc-dummy";
913
914 /* find one from the set of registered platforms */
915 list_for_each_entry(platform, &platform_list, list) {
916 if (dai_link->platform_of_node) {
917 if (platform->dev->of_node !=
918 dai_link->platform_of_node)
919 continue;
920 } else {
921 if (strcmp(platform->name, platform_name))
922 continue;
923 }
924
925 rtd->platform = platform;
926 }
927 if (!rtd->platform) {
928 dev_err(card->dev, "ASoC: platform %s not registered\n",
929 dai_link->platform_name);
930 return -EPROBE_DEFER;
931 }
932
933 card->num_rtd++;
934
935 return 0;
936 }
937
938 static int soc_remove_platform(struct snd_soc_platform *platform)
939 {
940 int ret;
941
942 if (platform->driver->remove) {
943 ret = platform->driver->remove(platform);
944 if (ret < 0)
945 dev_err(platform->dev, "ASoC: failed to remove %d\n",
946 ret);
947 }
948
949 /* Make sure all DAPM widgets are freed */
950 snd_soc_dapm_free(&platform->dapm);
951
952 soc_cleanup_platform_debugfs(platform);
953 platform->probed = 0;
954 list_del(&platform->card_list);
955 module_put(platform->dev->driver->owner);
956
957 return 0;
958 }
959
960 static void soc_remove_codec(struct snd_soc_codec *codec)
961 {
962 int err;
963
964 if (codec->driver->remove) {
965 err = codec->driver->remove(codec);
966 if (err < 0)
967 dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
968 }
969
970 /* Make sure all DAPM widgets are freed */
971 snd_soc_dapm_free(&codec->dapm);
972
973 soc_cleanup_codec_debugfs(codec);
974 codec->probed = 0;
975 list_del(&codec->card_list);
976 module_put(codec->dev->driver->owner);
977 }
978
979 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
980 {
981 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
982 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
983 int err;
984
985 /* unregister the rtd device */
986 if (rtd->dev_registered) {
987 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
988 device_remove_file(rtd->dev, &dev_attr_codec_reg);
989 device_unregister(rtd->dev);
990 rtd->dev_registered = 0;
991 }
992
993 /* remove the CODEC DAI */
994 if (codec_dai && codec_dai->probed &&
995 codec_dai->driver->remove_order == order) {
996 if (codec_dai->driver->remove) {
997 err = codec_dai->driver->remove(codec_dai);
998 if (err < 0)
999 dev_err(codec_dai->dev,
1000 "ASoC: failed to remove %s: %d\n",
1001 codec_dai->name, err);
1002 }
1003 codec_dai->probed = 0;
1004 list_del(&codec_dai->card_list);
1005 }
1006
1007 /* remove the cpu_dai */
1008 if (cpu_dai && cpu_dai->probed &&
1009 cpu_dai->driver->remove_order == order) {
1010 if (cpu_dai->driver->remove) {
1011 err = cpu_dai->driver->remove(cpu_dai);
1012 if (err < 0)
1013 dev_err(cpu_dai->dev,
1014 "ASoC: failed to remove %s: %d\n",
1015 cpu_dai->name, err);
1016 }
1017 cpu_dai->probed = 0;
1018 list_del(&cpu_dai->card_list);
1019
1020 if (!cpu_dai->codec) {
1021 snd_soc_dapm_free(&cpu_dai->dapm);
1022 module_put(cpu_dai->dev->driver->owner);
1023 }
1024 }
1025 }
1026
1027 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1028 int order)
1029 {
1030 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1031 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1032 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1033 struct snd_soc_platform *platform = rtd->platform;
1034 struct snd_soc_codec *codec;
1035
1036 /* remove the platform */
1037 if (platform && platform->probed &&
1038 platform->driver->remove_order == order) {
1039 soc_remove_platform(platform);
1040 }
1041
1042 /* remove the CODEC-side CODEC */
1043 if (codec_dai) {
1044 codec = codec_dai->codec;
1045 if (codec && codec->probed &&
1046 codec->driver->remove_order == order)
1047 soc_remove_codec(codec);
1048 }
1049
1050 /* remove any CPU-side CODEC */
1051 if (cpu_dai) {
1052 codec = cpu_dai->codec;
1053 if (codec && codec->probed &&
1054 codec->driver->remove_order == order)
1055 soc_remove_codec(codec);
1056 }
1057 }
1058
1059 static void soc_remove_dai_links(struct snd_soc_card *card)
1060 {
1061 int dai, order;
1062
1063 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1064 order++) {
1065 for (dai = 0; dai < card->num_rtd; dai++)
1066 soc_remove_link_dais(card, dai, order);
1067 }
1068
1069 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1070 order++) {
1071 for (dai = 0; dai < card->num_rtd; dai++)
1072 soc_remove_link_components(card, dai, order);
1073 }
1074
1075 card->num_rtd = 0;
1076 }
1077
1078 static void soc_set_name_prefix(struct snd_soc_card *card,
1079 struct snd_soc_codec *codec)
1080 {
1081 int i;
1082
1083 if (card->codec_conf == NULL)
1084 return;
1085
1086 for (i = 0; i < card->num_configs; i++) {
1087 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1088 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1089 codec->name_prefix = map->name_prefix;
1090 break;
1091 }
1092 }
1093 }
1094
1095 static int soc_probe_codec(struct snd_soc_card *card,
1096 struct snd_soc_codec *codec)
1097 {
1098 int ret = 0;
1099 const struct snd_soc_codec_driver *driver = codec->driver;
1100 struct snd_soc_dai *dai;
1101
1102 codec->card = card;
1103 codec->dapm.card = card;
1104 soc_set_name_prefix(card, codec);
1105
1106 if (!try_module_get(codec->dev->driver->owner))
1107 return -ENODEV;
1108
1109 soc_init_codec_debugfs(codec);
1110
1111 if (driver->dapm_widgets)
1112 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1113 driver->num_dapm_widgets);
1114
1115 /* Create DAPM widgets for each DAI stream */
1116 list_for_each_entry(dai, &dai_list, list) {
1117 if (dai->dev != codec->dev)
1118 continue;
1119
1120 snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1121 }
1122
1123 codec->dapm.idle_bias_off = driver->idle_bias_off;
1124
1125 if (driver->probe) {
1126 ret = driver->probe(codec);
1127 if (ret < 0) {
1128 dev_err(codec->dev,
1129 "ASoC: failed to probe CODEC %d\n", ret);
1130 goto err_probe;
1131 }
1132 WARN(codec->dapm.idle_bias_off &&
1133 codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1134 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1135 codec->name);
1136 }
1137
1138 /* If the driver didn't set I/O up try regmap */
1139 if (!codec->write && dev_get_regmap(codec->dev, NULL))
1140 snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
1141
1142 if (driver->controls)
1143 snd_soc_add_codec_controls(codec, driver->controls,
1144 driver->num_controls);
1145 if (driver->dapm_routes)
1146 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1147 driver->num_dapm_routes);
1148
1149 /* mark codec as probed and add to card codec list */
1150 codec->probed = 1;
1151 list_add(&codec->card_list, &card->codec_dev_list);
1152 list_add(&codec->dapm.list, &card->dapm_list);
1153
1154 return 0;
1155
1156 err_probe:
1157 soc_cleanup_codec_debugfs(codec);
1158 module_put(codec->dev->driver->owner);
1159
1160 return ret;
1161 }
1162
1163 static int soc_probe_platform(struct snd_soc_card *card,
1164 struct snd_soc_platform *platform)
1165 {
1166 int ret = 0;
1167 const struct snd_soc_platform_driver *driver = platform->driver;
1168 struct snd_soc_dai *dai;
1169
1170 platform->card = card;
1171 platform->dapm.card = card;
1172
1173 if (!try_module_get(platform->dev->driver->owner))
1174 return -ENODEV;
1175
1176 soc_init_platform_debugfs(platform);
1177
1178 if (driver->dapm_widgets)
1179 snd_soc_dapm_new_controls(&platform->dapm,
1180 driver->dapm_widgets, driver->num_dapm_widgets);
1181
1182 /* Create DAPM widgets for each DAI stream */
1183 list_for_each_entry(dai, &dai_list, list) {
1184 if (dai->dev != platform->dev)
1185 continue;
1186
1187 snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1188 }
1189
1190 platform->dapm.idle_bias_off = 1;
1191
1192 if (driver->probe) {
1193 ret = driver->probe(platform);
1194 if (ret < 0) {
1195 dev_err(platform->dev,
1196 "ASoC: failed to probe platform %d\n", ret);
1197 goto err_probe;
1198 }
1199 }
1200
1201 if (driver->controls)
1202 snd_soc_add_platform_controls(platform, driver->controls,
1203 driver->num_controls);
1204 if (driver->dapm_routes)
1205 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1206 driver->num_dapm_routes);
1207
1208 /* mark platform as probed and add to card platform list */
1209 platform->probed = 1;
1210 list_add(&platform->card_list, &card->platform_dev_list);
1211 list_add(&platform->dapm.list, &card->dapm_list);
1212
1213 return 0;
1214
1215 err_probe:
1216 soc_cleanup_platform_debugfs(platform);
1217 module_put(platform->dev->driver->owner);
1218
1219 return ret;
1220 }
1221
1222 static void rtd_release(struct device *dev)
1223 {
1224 kfree(dev);
1225 }
1226
1227 static int soc_post_component_init(struct snd_soc_card *card,
1228 struct snd_soc_codec *codec,
1229 int num, int dailess)
1230 {
1231 struct snd_soc_dai_link *dai_link = NULL;
1232 struct snd_soc_aux_dev *aux_dev = NULL;
1233 struct snd_soc_pcm_runtime *rtd;
1234 const char *temp, *name;
1235 int ret = 0;
1236
1237 if (!dailess) {
1238 dai_link = &card->dai_link[num];
1239 rtd = &card->rtd[num];
1240 name = dai_link->name;
1241 } else {
1242 aux_dev = &card->aux_dev[num];
1243 rtd = &card->rtd_aux[num];
1244 name = aux_dev->name;
1245 }
1246 rtd->card = card;
1247
1248 /* machine controls, routes and widgets are not prefixed */
1249 temp = codec->name_prefix;
1250 codec->name_prefix = NULL;
1251
1252 /* do machine specific initialization */
1253 if (!dailess && dai_link->init)
1254 ret = dai_link->init(rtd);
1255 else if (dailess && aux_dev->init)
1256 ret = aux_dev->init(&codec->dapm);
1257 if (ret < 0) {
1258 dev_err(card->dev, "ASoC: failed to init %s: %d\n", name, ret);
1259 return ret;
1260 }
1261 codec->name_prefix = temp;
1262
1263 /* register the rtd device */
1264 rtd->codec = codec;
1265
1266 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1267 if (!rtd->dev)
1268 return -ENOMEM;
1269 device_initialize(rtd->dev);
1270 rtd->dev->parent = card->dev;
1271 rtd->dev->release = rtd_release;
1272 rtd->dev->init_name = name;
1273 dev_set_drvdata(rtd->dev, rtd);
1274 mutex_init(&rtd->pcm_mutex);
1275 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1276 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1277 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1278 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1279 ret = device_add(rtd->dev);
1280 if (ret < 0) {
1281 /* calling put_device() here to free the rtd->dev */
1282 put_device(rtd->dev);
1283 dev_err(card->dev,
1284 "ASoC: failed to register runtime device: %d\n", ret);
1285 return ret;
1286 }
1287 rtd->dev_registered = 1;
1288
1289 /* add DAPM sysfs entries for this codec */
1290 ret = snd_soc_dapm_sys_add(rtd->dev);
1291 if (ret < 0)
1292 dev_err(codec->dev,
1293 "ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1294
1295 /* add codec sysfs entries */
1296 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1297 if (ret < 0)
1298 dev_err(codec->dev,
1299 "ASoC: failed to add codec sysfs files: %d\n", ret);
1300
1301 #ifdef CONFIG_DEBUG_FS
1302 /* add DPCM sysfs entries */
1303 if (!dailess && !dai_link->dynamic)
1304 goto out;
1305
1306 ret = soc_dpcm_debugfs_add(rtd);
1307 if (ret < 0)
1308 dev_err(rtd->dev, "ASoC: failed to add dpcm sysfs entries: %d\n", ret);
1309
1310 out:
1311 #endif
1312 return 0;
1313 }
1314
1315 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1316 int order)
1317 {
1318 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1319 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1320 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1321 struct snd_soc_platform *platform = rtd->platform;
1322 int ret;
1323
1324 /* probe the CPU-side component, if it is a CODEC */
1325 if (cpu_dai->codec &&
1326 !cpu_dai->codec->probed &&
1327 cpu_dai->codec->driver->probe_order == order) {
1328 ret = soc_probe_codec(card, cpu_dai->codec);
1329 if (ret < 0)
1330 return ret;
1331 }
1332
1333 /* probe the CODEC-side component */
1334 if (!codec_dai->codec->probed &&
1335 codec_dai->codec->driver->probe_order == order) {
1336 ret = soc_probe_codec(card, codec_dai->codec);
1337 if (ret < 0)
1338 return ret;
1339 }
1340
1341 /* probe the platform */
1342 if (!platform->probed &&
1343 platform->driver->probe_order == order) {
1344 ret = soc_probe_platform(card, platform);
1345 if (ret < 0)
1346 return ret;
1347 }
1348
1349 return 0;
1350 }
1351
1352 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1353 {
1354 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1355 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1356 struct snd_soc_codec *codec = rtd->codec;
1357 struct snd_soc_platform *platform = rtd->platform;
1358 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1359 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1360 struct snd_soc_dapm_widget *play_w, *capture_w;
1361 int ret;
1362
1363 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1364 card->name, num, order);
1365
1366 /* config components */
1367 cpu_dai->platform = platform;
1368 codec_dai->card = card;
1369 cpu_dai->card = card;
1370
1371 /* set default power off timeout */
1372 rtd->pmdown_time = pmdown_time;
1373
1374 /* probe the cpu_dai */
1375 if (!cpu_dai->probed &&
1376 cpu_dai->driver->probe_order == order) {
1377 if (!cpu_dai->codec) {
1378 cpu_dai->dapm.card = card;
1379 if (!try_module_get(cpu_dai->dev->driver->owner))
1380 return -ENODEV;
1381
1382 list_add(&cpu_dai->dapm.list, &card->dapm_list);
1383 }
1384
1385 if (cpu_dai->driver->probe) {
1386 ret = cpu_dai->driver->probe(cpu_dai);
1387 if (ret < 0) {
1388 dev_err(cpu_dai->dev,
1389 "ASoC: failed to probe CPU DAI %s: %d\n",
1390 cpu_dai->name, ret);
1391 module_put(cpu_dai->dev->driver->owner);
1392 return ret;
1393 }
1394 }
1395 cpu_dai->probed = 1;
1396 /* mark cpu_dai as probed and add to card dai list */
1397 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1398 }
1399
1400 /* probe the CODEC DAI */
1401 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1402 if (codec_dai->driver->probe) {
1403 ret = codec_dai->driver->probe(codec_dai);
1404 if (ret < 0) {
1405 dev_err(codec_dai->dev,
1406 "ASoC: failed to probe CODEC DAI %s: %d\n",
1407 codec_dai->name, ret);
1408 return ret;
1409 }
1410 }
1411
1412 /* mark codec_dai as probed and add to card dai list */
1413 codec_dai->probed = 1;
1414 list_add(&codec_dai->card_list, &card->dai_dev_list);
1415 }
1416
1417 /* complete DAI probe during last probe */
1418 if (order != SND_SOC_COMP_ORDER_LAST)
1419 return 0;
1420
1421 ret = soc_post_component_init(card, codec, num, 0);
1422 if (ret)
1423 return ret;
1424
1425 ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1426 if (ret < 0)
1427 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1428 ret);
1429
1430 if (cpu_dai->driver->compress_dai) {
1431 /*create compress_device"*/
1432 ret = soc_new_compress(rtd, num);
1433 if (ret < 0) {
1434 dev_err(card->dev, "ASoC: can't create compress %s\n",
1435 dai_link->stream_name);
1436 return ret;
1437 }
1438 } else {
1439
1440 if (!dai_link->params) {
1441 /* create the pcm */
1442 ret = soc_new_pcm(rtd, num);
1443 if (ret < 0) {
1444 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1445 dai_link->stream_name, ret);
1446 return ret;
1447 }
1448 } else {
1449 INIT_DELAYED_WORK(&rtd->delayed_work,
1450 codec2codec_close_delayed_work);
1451
1452 /* link the DAI widgets */
1453 play_w = codec_dai->playback_widget;
1454 capture_w = cpu_dai->capture_widget;
1455 if (play_w && capture_w) {
1456 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1457 capture_w, play_w);
1458 if (ret != 0) {
1459 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1460 play_w->name, capture_w->name, ret);
1461 return ret;
1462 }
1463 }
1464
1465 play_w = cpu_dai->playback_widget;
1466 capture_w = codec_dai->capture_widget;
1467 if (play_w && capture_w) {
1468 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1469 capture_w, play_w);
1470 if (ret != 0) {
1471 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1472 play_w->name, capture_w->name, ret);
1473 return ret;
1474 }
1475 }
1476 }
1477 }
1478
1479 /* add platform data for AC97 devices */
1480 if (rtd->codec_dai->driver->ac97_control)
1481 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1482
1483 return 0;
1484 }
1485
1486 #ifdef CONFIG_SND_SOC_AC97_BUS
1487 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1488 {
1489 int ret;
1490
1491 /* Only instantiate AC97 if not already done by the adaptor
1492 * for the generic AC97 subsystem.
1493 */
1494 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1495 /*
1496 * It is possible that the AC97 device is already registered to
1497 * the device subsystem. This happens when the device is created
1498 * via snd_ac97_mixer(). Currently only SoC codec that does so
1499 * is the generic AC97 glue but others migh emerge.
1500 *
1501 * In those cases we don't try to register the device again.
1502 */
1503 if (!rtd->codec->ac97_created)
1504 return 0;
1505
1506 ret = soc_ac97_dev_register(rtd->codec);
1507 if (ret < 0) {
1508 dev_err(rtd->codec->dev,
1509 "ASoC: AC97 device register failed: %d\n", ret);
1510 return ret;
1511 }
1512
1513 rtd->codec->ac97_registered = 1;
1514 }
1515 return 0;
1516 }
1517
1518 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1519 {
1520 if (codec->ac97_registered) {
1521 soc_ac97_dev_unregister(codec);
1522 codec->ac97_registered = 0;
1523 }
1524 }
1525 #endif
1526
1527 static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1528 {
1529 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1530 struct snd_soc_codec *codec;
1531
1532 /* find CODEC from registered CODECs*/
1533 list_for_each_entry(codec, &codec_list, list) {
1534 if (!strcmp(codec->name, aux_dev->codec_name))
1535 return 0;
1536 }
1537
1538 dev_err(card->dev, "ASoC: %s not registered\n", aux_dev->codec_name);
1539
1540 return -EPROBE_DEFER;
1541 }
1542
1543 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1544 {
1545 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1546 struct snd_soc_codec *codec;
1547 int ret = -ENODEV;
1548
1549 /* find CODEC from registered CODECs*/
1550 list_for_each_entry(codec, &codec_list, list) {
1551 if (!strcmp(codec->name, aux_dev->codec_name)) {
1552 if (codec->probed) {
1553 dev_err(codec->dev,
1554 "ASoC: codec already probed");
1555 ret = -EBUSY;
1556 goto out;
1557 }
1558 goto found;
1559 }
1560 }
1561 /* codec not found */
1562 dev_err(card->dev, "ASoC: codec %s not found", aux_dev->codec_name);
1563 return -EPROBE_DEFER;
1564
1565 found:
1566 ret = soc_probe_codec(card, codec);
1567 if (ret < 0)
1568 return ret;
1569
1570 ret = soc_post_component_init(card, codec, num, 1);
1571
1572 out:
1573 return ret;
1574 }
1575
1576 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1577 {
1578 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1579 struct snd_soc_codec *codec = rtd->codec;
1580
1581 /* unregister the rtd device */
1582 if (rtd->dev_registered) {
1583 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1584 device_unregister(rtd->dev);
1585 rtd->dev_registered = 0;
1586 }
1587
1588 if (codec && codec->probed)
1589 soc_remove_codec(codec);
1590 }
1591
1592 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1593 enum snd_soc_compress_type compress_type)
1594 {
1595 int ret;
1596
1597 if (codec->cache_init)
1598 return 0;
1599
1600 /* override the compress_type if necessary */
1601 if (compress_type && codec->compress_type != compress_type)
1602 codec->compress_type = compress_type;
1603 ret = snd_soc_cache_init(codec);
1604 if (ret < 0) {
1605 dev_err(codec->dev,
1606 "ASoC: Failed to set cache compression type: %d\n",
1607 ret);
1608 return ret;
1609 }
1610 codec->cache_init = 1;
1611 return 0;
1612 }
1613
1614 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1615 {
1616 struct snd_soc_codec *codec;
1617 struct snd_soc_codec_conf *codec_conf;
1618 enum snd_soc_compress_type compress_type;
1619 struct snd_soc_dai_link *dai_link;
1620 int ret, i, order, dai_fmt;
1621
1622 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1623
1624 /* bind DAIs */
1625 for (i = 0; i < card->num_links; i++) {
1626 ret = soc_bind_dai_link(card, i);
1627 if (ret != 0)
1628 goto base_error;
1629 }
1630
1631 /* check aux_devs too */
1632 for (i = 0; i < card->num_aux_devs; i++) {
1633 ret = soc_check_aux_dev(card, i);
1634 if (ret != 0)
1635 goto base_error;
1636 }
1637
1638 /* initialize the register cache for each available codec */
1639 list_for_each_entry(codec, &codec_list, list) {
1640 if (codec->cache_init)
1641 continue;
1642 /* by default we don't override the compress_type */
1643 compress_type = 0;
1644 /* check to see if we need to override the compress_type */
1645 for (i = 0; i < card->num_configs; ++i) {
1646 codec_conf = &card->codec_conf[i];
1647 if (!strcmp(codec->name, codec_conf->dev_name)) {
1648 compress_type = codec_conf->compress_type;
1649 if (compress_type && compress_type
1650 != codec->compress_type)
1651 break;
1652 }
1653 }
1654 ret = snd_soc_init_codec_cache(codec, compress_type);
1655 if (ret < 0)
1656 goto base_error;
1657 }
1658
1659 /* card bind complete so register a sound card */
1660 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1661 card->owner, 0, &card->snd_card);
1662 if (ret < 0) {
1663 dev_err(card->dev,
1664 "ASoC: can't create sound card for card %s: %d\n",
1665 card->name, ret);
1666 goto base_error;
1667 }
1668 card->snd_card->dev = card->dev;
1669
1670 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1671 card->dapm.dev = card->dev;
1672 card->dapm.card = card;
1673 list_add(&card->dapm.list, &card->dapm_list);
1674
1675 #ifdef CONFIG_DEBUG_FS
1676 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1677 #endif
1678
1679 #ifdef CONFIG_PM_SLEEP
1680 /* deferred resume work */
1681 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1682 #endif
1683
1684 if (card->dapm_widgets)
1685 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1686 card->num_dapm_widgets);
1687
1688 /* initialise the sound card only once */
1689 if (card->probe) {
1690 ret = card->probe(card);
1691 if (ret < 0)
1692 goto card_probe_error;
1693 }
1694
1695 /* probe all components used by DAI links on this card */
1696 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1697 order++) {
1698 for (i = 0; i < card->num_links; i++) {
1699 ret = soc_probe_link_components(card, i, order);
1700 if (ret < 0) {
1701 dev_err(card->dev,
1702 "ASoC: failed to instantiate card %d\n",
1703 ret);
1704 goto probe_dai_err;
1705 }
1706 }
1707 }
1708
1709 /* probe all DAI links on this card */
1710 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1711 order++) {
1712 for (i = 0; i < card->num_links; i++) {
1713 ret = soc_probe_link_dais(card, i, order);
1714 if (ret < 0) {
1715 dev_err(card->dev,
1716 "ASoC: failed to instantiate card %d\n",
1717 ret);
1718 goto probe_dai_err;
1719 }
1720 }
1721 }
1722
1723 for (i = 0; i < card->num_aux_devs; i++) {
1724 ret = soc_probe_aux_dev(card, i);
1725 if (ret < 0) {
1726 dev_err(card->dev,
1727 "ASoC: failed to add auxiliary devices %d\n",
1728 ret);
1729 goto probe_aux_dev_err;
1730 }
1731 }
1732
1733 snd_soc_dapm_link_dai_widgets(card);
1734
1735 if (card->controls)
1736 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1737
1738 if (card->dapm_routes)
1739 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1740 card->num_dapm_routes);
1741
1742 for (i = 0; i < card->num_links; i++) {
1743 dai_link = &card->dai_link[i];
1744 dai_fmt = dai_link->dai_fmt;
1745
1746 if (dai_fmt) {
1747 ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1748 dai_fmt);
1749 if (ret != 0 && ret != -ENOTSUPP)
1750 dev_warn(card->rtd[i].codec_dai->dev,
1751 "ASoC: Failed to set DAI format: %d\n",
1752 ret);
1753 }
1754
1755 /* If this is a regular CPU link there will be a platform */
1756 if (dai_fmt &&
1757 (dai_link->platform_name || dai_link->platform_of_node)) {
1758 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1759 dai_fmt);
1760 if (ret != 0 && ret != -ENOTSUPP)
1761 dev_warn(card->rtd[i].cpu_dai->dev,
1762 "ASoC: Failed to set DAI format: %d\n",
1763 ret);
1764 } else if (dai_fmt) {
1765 /* Flip the polarity for the "CPU" end */
1766 dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1767 switch (dai_link->dai_fmt &
1768 SND_SOC_DAIFMT_MASTER_MASK) {
1769 case SND_SOC_DAIFMT_CBM_CFM:
1770 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1771 break;
1772 case SND_SOC_DAIFMT_CBM_CFS:
1773 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1774 break;
1775 case SND_SOC_DAIFMT_CBS_CFM:
1776 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1777 break;
1778 case SND_SOC_DAIFMT_CBS_CFS:
1779 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1780 break;
1781 }
1782
1783 ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1784 dai_fmt);
1785 if (ret != 0 && ret != -ENOTSUPP)
1786 dev_warn(card->rtd[i].cpu_dai->dev,
1787 "ASoC: Failed to set DAI format: %d\n",
1788 ret);
1789 }
1790 }
1791
1792 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1793 "%s", card->name);
1794 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1795 "%s", card->long_name ? card->long_name : card->name);
1796 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1797 "%s", card->driver_name ? card->driver_name : card->name);
1798 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1799 switch (card->snd_card->driver[i]) {
1800 case '_':
1801 case '-':
1802 case '\0':
1803 break;
1804 default:
1805 if (!isalnum(card->snd_card->driver[i]))
1806 card->snd_card->driver[i] = '_';
1807 break;
1808 }
1809 }
1810
1811 if (card->late_probe) {
1812 ret = card->late_probe(card);
1813 if (ret < 0) {
1814 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1815 card->name, ret);
1816 goto probe_aux_dev_err;
1817 }
1818 }
1819
1820 if (card->fully_routed)
1821 list_for_each_entry(codec, &card->codec_dev_list, card_list)
1822 snd_soc_dapm_auto_nc_codec_pins(codec);
1823
1824 snd_soc_dapm_new_widgets(card);
1825
1826 ret = snd_card_register(card->snd_card);
1827 if (ret < 0) {
1828 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1829 ret);
1830 goto probe_aux_dev_err;
1831 }
1832
1833 #ifdef CONFIG_SND_SOC_AC97_BUS
1834 /* register any AC97 codecs */
1835 for (i = 0; i < card->num_rtd; i++) {
1836 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1837 if (ret < 0) {
1838 dev_err(card->dev,
1839 "ASoC: failed to register AC97: %d\n", ret);
1840 while (--i >= 0)
1841 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1842 goto probe_aux_dev_err;
1843 }
1844 }
1845 #endif
1846
1847 card->instantiated = 1;
1848 snd_soc_dapm_sync(&card->dapm);
1849 mutex_unlock(&card->mutex);
1850
1851 return 0;
1852
1853 probe_aux_dev_err:
1854 for (i = 0; i < card->num_aux_devs; i++)
1855 soc_remove_aux_dev(card, i);
1856
1857 probe_dai_err:
1858 soc_remove_dai_links(card);
1859
1860 card_probe_error:
1861 if (card->remove)
1862 card->remove(card);
1863
1864 snd_card_free(card->snd_card);
1865
1866 base_error:
1867 mutex_unlock(&card->mutex);
1868
1869 return ret;
1870 }
1871
1872 /* probes a new socdev */
1873 static int soc_probe(struct platform_device *pdev)
1874 {
1875 struct snd_soc_card *card = platform_get_drvdata(pdev);
1876
1877 /*
1878 * no card, so machine driver should be registering card
1879 * we should not be here in that case so ret error
1880 */
1881 if (!card)
1882 return -EINVAL;
1883
1884 dev_warn(&pdev->dev,
1885 "ASoC: machine %s should use snd_soc_register_card()\n",
1886 card->name);
1887
1888 /* Bodge while we unpick instantiation */
1889 card->dev = &pdev->dev;
1890
1891 return snd_soc_register_card(card);
1892 }
1893
1894 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1895 {
1896 int i;
1897
1898 /* make sure any delayed work runs */
1899 for (i = 0; i < card->num_rtd; i++) {
1900 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1901 flush_delayed_work(&rtd->delayed_work);
1902 }
1903
1904 /* remove auxiliary devices */
1905 for (i = 0; i < card->num_aux_devs; i++)
1906 soc_remove_aux_dev(card, i);
1907
1908 /* remove and free each DAI */
1909 soc_remove_dai_links(card);
1910
1911 soc_cleanup_card_debugfs(card);
1912
1913 /* remove the card */
1914 if (card->remove)
1915 card->remove(card);
1916
1917 snd_soc_dapm_free(&card->dapm);
1918
1919 snd_card_free(card->snd_card);
1920 return 0;
1921
1922 }
1923
1924 /* removes a socdev */
1925 static int soc_remove(struct platform_device *pdev)
1926 {
1927 struct snd_soc_card *card = platform_get_drvdata(pdev);
1928
1929 snd_soc_unregister_card(card);
1930 return 0;
1931 }
1932
1933 int snd_soc_poweroff(struct device *dev)
1934 {
1935 struct snd_soc_card *card = dev_get_drvdata(dev);
1936 int i;
1937
1938 if (!card->instantiated)
1939 return 0;
1940
1941 /* Flush out pmdown_time work - we actually do want to run it
1942 * now, we're shutting down so no imminent restart. */
1943 for (i = 0; i < card->num_rtd; i++) {
1944 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1945 flush_delayed_work(&rtd->delayed_work);
1946 }
1947
1948 snd_soc_dapm_shutdown(card);
1949
1950 return 0;
1951 }
1952 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1953
1954 const struct dev_pm_ops snd_soc_pm_ops = {
1955 .suspend = snd_soc_suspend,
1956 .resume = snd_soc_resume,
1957 .freeze = snd_soc_suspend,
1958 .thaw = snd_soc_resume,
1959 .poweroff = snd_soc_poweroff,
1960 .restore = snd_soc_resume,
1961 };
1962 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1963
1964 /* ASoC platform driver */
1965 static struct platform_driver soc_driver = {
1966 .driver = {
1967 .name = "soc-audio",
1968 .owner = THIS_MODULE,
1969 .pm = &snd_soc_pm_ops,
1970 },
1971 .probe = soc_probe,
1972 .remove = soc_remove,
1973 };
1974
1975 /**
1976 * snd_soc_codec_volatile_register: Report if a register is volatile.
1977 *
1978 * @codec: CODEC to query.
1979 * @reg: Register to query.
1980 *
1981 * Boolean function indiciating if a CODEC register is volatile.
1982 */
1983 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1984 unsigned int reg)
1985 {
1986 if (codec->volatile_register)
1987 return codec->volatile_register(codec, reg);
1988 else
1989 return 0;
1990 }
1991 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1992
1993 /**
1994 * snd_soc_codec_readable_register: Report if a register is readable.
1995 *
1996 * @codec: CODEC to query.
1997 * @reg: Register to query.
1998 *
1999 * Boolean function indicating if a CODEC register is readable.
2000 */
2001 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2002 unsigned int reg)
2003 {
2004 if (codec->readable_register)
2005 return codec->readable_register(codec, reg);
2006 else
2007 return 1;
2008 }
2009 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2010
2011 /**
2012 * snd_soc_codec_writable_register: Report if a register is writable.
2013 *
2014 * @codec: CODEC to query.
2015 * @reg: Register to query.
2016 *
2017 * Boolean function indicating if a CODEC register is writable.
2018 */
2019 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2020 unsigned int reg)
2021 {
2022 if (codec->writable_register)
2023 return codec->writable_register(codec, reg);
2024 else
2025 return 1;
2026 }
2027 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2028
2029 int snd_soc_platform_read(struct snd_soc_platform *platform,
2030 unsigned int reg)
2031 {
2032 unsigned int ret;
2033
2034 if (!platform->driver->read) {
2035 dev_err(platform->dev, "ASoC: platform has no read back\n");
2036 return -1;
2037 }
2038
2039 ret = platform->driver->read(platform, reg);
2040 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
2041 trace_snd_soc_preg_read(platform, reg, ret);
2042
2043 return ret;
2044 }
2045 EXPORT_SYMBOL_GPL(snd_soc_platform_read);
2046
2047 int snd_soc_platform_write(struct snd_soc_platform *platform,
2048 unsigned int reg, unsigned int val)
2049 {
2050 if (!platform->driver->write) {
2051 dev_err(platform->dev, "ASoC: platform has no write back\n");
2052 return -1;
2053 }
2054
2055 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
2056 trace_snd_soc_preg_write(platform, reg, val);
2057 return platform->driver->write(platform, reg, val);
2058 }
2059 EXPORT_SYMBOL_GPL(snd_soc_platform_write);
2060
2061 /**
2062 * snd_soc_new_ac97_codec - initailise AC97 device
2063 * @codec: audio codec
2064 * @ops: AC97 bus operations
2065 * @num: AC97 codec number
2066 *
2067 * Initialises AC97 codec resources for use by ad-hoc devices only.
2068 */
2069 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2070 struct snd_ac97_bus_ops *ops, int num)
2071 {
2072 mutex_lock(&codec->mutex);
2073
2074 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2075 if (codec->ac97 == NULL) {
2076 mutex_unlock(&codec->mutex);
2077 return -ENOMEM;
2078 }
2079
2080 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2081 if (codec->ac97->bus == NULL) {
2082 kfree(codec->ac97);
2083 codec->ac97 = NULL;
2084 mutex_unlock(&codec->mutex);
2085 return -ENOMEM;
2086 }
2087
2088 codec->ac97->bus->ops = ops;
2089 codec->ac97->num = num;
2090
2091 /*
2092 * Mark the AC97 device to be created by us. This way we ensure that the
2093 * device will be registered with the device subsystem later on.
2094 */
2095 codec->ac97_created = 1;
2096
2097 mutex_unlock(&codec->mutex);
2098 return 0;
2099 }
2100 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2101
2102 static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;
2103
2104 static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
2105 {
2106 struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2107
2108 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);
2109
2110 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);
2111
2112 udelay(10);
2113
2114 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2115
2116 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2117 msleep(2);
2118 }
2119
2120 static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
2121 {
2122 struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2123
2124 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);
2125
2126 gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2127 gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
2128 gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);
2129
2130 udelay(10);
2131
2132 gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);
2133
2134 pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2135 msleep(2);
2136 }
2137
2138 static int snd_soc_ac97_parse_pinctl(struct device *dev,
2139 struct snd_ac97_reset_cfg *cfg)
2140 {
2141 struct pinctrl *p;
2142 struct pinctrl_state *state;
2143 int gpio;
2144 int ret;
2145
2146 p = devm_pinctrl_get(dev);
2147 if (IS_ERR(p)) {
2148 dev_err(dev, "Failed to get pinctrl\n");
2149 return PTR_RET(p);
2150 }
2151 cfg->pctl = p;
2152
2153 state = pinctrl_lookup_state(p, "ac97-reset");
2154 if (IS_ERR(state)) {
2155 dev_err(dev, "Can't find pinctrl state ac97-reset\n");
2156 return PTR_RET(state);
2157 }
2158 cfg->pstate_reset = state;
2159
2160 state = pinctrl_lookup_state(p, "ac97-warm-reset");
2161 if (IS_ERR(state)) {
2162 dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
2163 return PTR_RET(state);
2164 }
2165 cfg->pstate_warm_reset = state;
2166
2167 state = pinctrl_lookup_state(p, "ac97-running");
2168 if (IS_ERR(state)) {
2169 dev_err(dev, "Can't find pinctrl state ac97-running\n");
2170 return PTR_RET(state);
2171 }
2172 cfg->pstate_run = state;
2173
2174 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
2175 if (gpio < 0) {
2176 dev_err(dev, "Can't find ac97-sync gpio\n");
2177 return gpio;
2178 }
2179 ret = devm_gpio_request(dev, gpio, "AC97 link sync");
2180 if (ret) {
2181 dev_err(dev, "Failed requesting ac97-sync gpio\n");
2182 return ret;
2183 }
2184 cfg->gpio_sync = gpio;
2185
2186 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
2187 if (gpio < 0) {
2188 dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
2189 return gpio;
2190 }
2191 ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
2192 if (ret) {
2193 dev_err(dev, "Failed requesting ac97-sdata gpio\n");
2194 return ret;
2195 }
2196 cfg->gpio_sdata = gpio;
2197
2198 gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
2199 if (gpio < 0) {
2200 dev_err(dev, "Can't find ac97-reset gpio\n");
2201 return gpio;
2202 }
2203 ret = devm_gpio_request(dev, gpio, "AC97 link reset");
2204 if (ret) {
2205 dev_err(dev, "Failed requesting ac97-reset gpio\n");
2206 return ret;
2207 }
2208 cfg->gpio_reset = gpio;
2209
2210 return 0;
2211 }
2212
2213 struct snd_ac97_bus_ops *soc_ac97_ops;
2214 EXPORT_SYMBOL_GPL(soc_ac97_ops);
2215
2216 int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
2217 {
2218 if (ops == soc_ac97_ops)
2219 return 0;
2220
2221 if (soc_ac97_ops && ops)
2222 return -EBUSY;
2223
2224 soc_ac97_ops = ops;
2225
2226 return 0;
2227 }
2228 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);
2229
2230 /**
2231 * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions
2232 *
2233 * This function sets the reset and warm_reset properties of ops and parses
2234 * the device node of pdev to get pinctrl states and gpio numbers to use.
2235 */
2236 int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,
2237 struct platform_device *pdev)
2238 {
2239 struct device *dev = &pdev->dev;
2240 struct snd_ac97_reset_cfg cfg;
2241 int ret;
2242
2243 ret = snd_soc_ac97_parse_pinctl(dev, &cfg);
2244 if (ret)
2245 return ret;
2246
2247 ret = snd_soc_set_ac97_ops(ops);
2248 if (ret)
2249 return ret;
2250
2251 ops->warm_reset = snd_soc_ac97_warm_reset;
2252 ops->reset = snd_soc_ac97_reset;
2253
2254 snd_ac97_rst_cfg = cfg;
2255 return 0;
2256 }
2257 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);
2258
2259 /**
2260 * snd_soc_free_ac97_codec - free AC97 codec device
2261 * @codec: audio codec
2262 *
2263 * Frees AC97 codec device resources.
2264 */
2265 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2266 {
2267 mutex_lock(&codec->mutex);
2268 #ifdef CONFIG_SND_SOC_AC97_BUS
2269 soc_unregister_ac97_dai_link(codec);
2270 #endif
2271 kfree(codec->ac97->bus);
2272 kfree(codec->ac97);
2273 codec->ac97 = NULL;
2274 codec->ac97_created = 0;
2275 mutex_unlock(&codec->mutex);
2276 }
2277 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2278
2279 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2280 {
2281 unsigned int ret;
2282
2283 ret = codec->read(codec, reg);
2284 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2285 trace_snd_soc_reg_read(codec, reg, ret);
2286
2287 return ret;
2288 }
2289 EXPORT_SYMBOL_GPL(snd_soc_read);
2290
2291 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2292 unsigned int reg, unsigned int val)
2293 {
2294 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2295 trace_snd_soc_reg_write(codec, reg, val);
2296 return codec->write(codec, reg, val);
2297 }
2298 EXPORT_SYMBOL_GPL(snd_soc_write);
2299
2300 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2301 unsigned int reg, const void *data, size_t len)
2302 {
2303 return codec->bulk_write_raw(codec, reg, data, len);
2304 }
2305 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2306
2307 /**
2308 * snd_soc_update_bits - update codec register bits
2309 * @codec: audio codec
2310 * @reg: codec register
2311 * @mask: register mask
2312 * @value: new value
2313 *
2314 * Writes new register value.
2315 *
2316 * Returns 1 for change, 0 for no change, or negative error code.
2317 */
2318 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2319 unsigned int mask, unsigned int value)
2320 {
2321 bool change;
2322 unsigned int old, new;
2323 int ret;
2324
2325 if (codec->using_regmap) {
2326 ret = regmap_update_bits_check(codec->control_data, reg,
2327 mask, value, &change);
2328 } else {
2329 ret = snd_soc_read(codec, reg);
2330 if (ret < 0)
2331 return ret;
2332
2333 old = ret;
2334 new = (old & ~mask) | (value & mask);
2335 change = old != new;
2336 if (change)
2337 ret = snd_soc_write(codec, reg, new);
2338 }
2339
2340 if (ret < 0)
2341 return ret;
2342
2343 return change;
2344 }
2345 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2346
2347 /**
2348 * snd_soc_update_bits_locked - update codec register bits
2349 * @codec: audio codec
2350 * @reg: codec register
2351 * @mask: register mask
2352 * @value: new value
2353 *
2354 * Writes new register value, and takes the codec mutex.
2355 *
2356 * Returns 1 for change else 0.
2357 */
2358 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2359 unsigned short reg, unsigned int mask,
2360 unsigned int value)
2361 {
2362 int change;
2363
2364 mutex_lock(&codec->mutex);
2365 change = snd_soc_update_bits(codec, reg, mask, value);
2366 mutex_unlock(&codec->mutex);
2367
2368 return change;
2369 }
2370 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2371
2372 /**
2373 * snd_soc_test_bits - test register for change
2374 * @codec: audio codec
2375 * @reg: codec register
2376 * @mask: register mask
2377 * @value: new value
2378 *
2379 * Tests a register with a new value and checks if the new value is
2380 * different from the old value.
2381 *
2382 * Returns 1 for change else 0.
2383 */
2384 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2385 unsigned int mask, unsigned int value)
2386 {
2387 int change;
2388 unsigned int old, new;
2389
2390 old = snd_soc_read(codec, reg);
2391 new = (old & ~mask) | value;
2392 change = old != new;
2393
2394 return change;
2395 }
2396 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2397
2398 /**
2399 * snd_soc_cnew - create new control
2400 * @_template: control template
2401 * @data: control private data
2402 * @long_name: control long name
2403 * @prefix: control name prefix
2404 *
2405 * Create a new mixer control from a template control.
2406 *
2407 * Returns 0 for success, else error.
2408 */
2409 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2410 void *data, const char *long_name,
2411 const char *prefix)
2412 {
2413 struct snd_kcontrol_new template;
2414 struct snd_kcontrol *kcontrol;
2415 char *name = NULL;
2416
2417 memcpy(&template, _template, sizeof(template));
2418 template.index = 0;
2419
2420 if (!long_name)
2421 long_name = template.name;
2422
2423 if (prefix) {
2424 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2425 if (!name)
2426 return NULL;
2427
2428 template.name = name;
2429 } else {
2430 template.name = long_name;
2431 }
2432
2433 kcontrol = snd_ctl_new1(&template, data);
2434
2435 kfree(name);
2436
2437 return kcontrol;
2438 }
2439 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2440
2441 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2442 const struct snd_kcontrol_new *controls, int num_controls,
2443 const char *prefix, void *data)
2444 {
2445 int err, i;
2446
2447 for (i = 0; i < num_controls; i++) {
2448 const struct snd_kcontrol_new *control = &controls[i];
2449 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2450 control->name, prefix));
2451 if (err < 0) {
2452 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2453 control->name, err);
2454 return err;
2455 }
2456 }
2457
2458 return 0;
2459 }
2460
2461 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2462 const char *name)
2463 {
2464 struct snd_card *card = soc_card->snd_card;
2465 struct snd_kcontrol *kctl;
2466
2467 if (unlikely(!name))
2468 return NULL;
2469
2470 list_for_each_entry(kctl, &card->controls, list)
2471 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2472 return kctl;
2473 return NULL;
2474 }
2475 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2476
2477 /**
2478 * snd_soc_add_codec_controls - add an array of controls to a codec.
2479 * Convenience function to add a list of controls. Many codecs were
2480 * duplicating this code.
2481 *
2482 * @codec: codec to add controls to
2483 * @controls: array of controls to add
2484 * @num_controls: number of elements in the array
2485 *
2486 * Return 0 for success, else error.
2487 */
2488 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2489 const struct snd_kcontrol_new *controls, int num_controls)
2490 {
2491 struct snd_card *card = codec->card->snd_card;
2492
2493 return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2494 codec->name_prefix, codec);
2495 }
2496 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2497
2498 /**
2499 * snd_soc_add_platform_controls - add an array of controls to a platform.
2500 * Convenience function to add a list of controls.
2501 *
2502 * @platform: platform to add controls to
2503 * @controls: array of controls to add
2504 * @num_controls: number of elements in the array
2505 *
2506 * Return 0 for success, else error.
2507 */
2508 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2509 const struct snd_kcontrol_new *controls, int num_controls)
2510 {
2511 struct snd_card *card = platform->card->snd_card;
2512
2513 return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2514 NULL, platform);
2515 }
2516 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2517
2518 /**
2519 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2520 * Convenience function to add a list of controls.
2521 *
2522 * @soc_card: SoC card to add controls to
2523 * @controls: array of controls to add
2524 * @num_controls: number of elements in the array
2525 *
2526 * Return 0 for success, else error.
2527 */
2528 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2529 const struct snd_kcontrol_new *controls, int num_controls)
2530 {
2531 struct snd_card *card = soc_card->snd_card;
2532
2533 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2534 NULL, soc_card);
2535 }
2536 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2537
2538 /**
2539 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2540 * Convienience function to add a list of controls.
2541 *
2542 * @dai: DAI to add controls to
2543 * @controls: array of controls to add
2544 * @num_controls: number of elements in the array
2545 *
2546 * Return 0 for success, else error.
2547 */
2548 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2549 const struct snd_kcontrol_new *controls, int num_controls)
2550 {
2551 struct snd_card *card = dai->card->snd_card;
2552
2553 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2554 NULL, dai);
2555 }
2556 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2557
2558 /**
2559 * snd_soc_info_enum_double - enumerated double mixer info callback
2560 * @kcontrol: mixer control
2561 * @uinfo: control element information
2562 *
2563 * Callback to provide information about a double enumerated
2564 * mixer control.
2565 *
2566 * Returns 0 for success.
2567 */
2568 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2569 struct snd_ctl_elem_info *uinfo)
2570 {
2571 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2572
2573 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2574 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2575 uinfo->value.enumerated.items = e->max;
2576
2577 if (uinfo->value.enumerated.item > e->max - 1)
2578 uinfo->value.enumerated.item = e->max - 1;
2579 strcpy(uinfo->value.enumerated.name,
2580 e->texts[uinfo->value.enumerated.item]);
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 &= ~params->mask;
3217 break;
3218 case 4:
3219 ((u32 *)(&ucontrol->value.bytes.data))[0]
3220 &= ~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 -EINVAL;
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 -EINVAL;
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_fmt - configure DAI hardware audio format.
3580 * @dai: DAI
3581 * @fmt: SND_SOC_DAIFMT_ format value.
3582 *
3583 * Configures the DAI hardware format and clocking.
3584 */
3585 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3586 {
3587 if (dai->driver == NULL)
3588 return -EINVAL;
3589 if (dai->driver->ops->set_fmt == NULL)
3590 return -ENOTSUPP;
3591 return dai->driver->ops->set_fmt(dai, fmt);
3592 }
3593 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3594
3595 /**
3596 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3597 * @dai: DAI
3598 * @tx_mask: bitmask representing active TX slots.
3599 * @rx_mask: bitmask representing active RX slots.
3600 * @slots: Number of slots in use.
3601 * @slot_width: Width in bits for each slot.
3602 *
3603 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3604 * specific.
3605 */
3606 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3607 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3608 {
3609 if (dai->driver && dai->driver->ops->set_tdm_slot)
3610 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3611 slots, slot_width);
3612 else
3613 return -EINVAL;
3614 }
3615 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3616
3617 /**
3618 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3619 * @dai: DAI
3620 * @tx_num: how many TX channels
3621 * @tx_slot: pointer to an array which imply the TX slot number channel
3622 * 0~num-1 uses
3623 * @rx_num: how many RX channels
3624 * @rx_slot: pointer to an array which imply the RX slot number channel
3625 * 0~num-1 uses
3626 *
3627 * configure the relationship between channel number and TDM slot number.
3628 */
3629 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3630 unsigned int tx_num, unsigned int *tx_slot,
3631 unsigned int rx_num, unsigned int *rx_slot)
3632 {
3633 if (dai->driver && dai->driver->ops->set_channel_map)
3634 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3635 rx_num, rx_slot);
3636 else
3637 return -EINVAL;
3638 }
3639 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3640
3641 /**
3642 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3643 * @dai: DAI
3644 * @tristate: tristate enable
3645 *
3646 * Tristates the DAI so that others can use it.
3647 */
3648 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3649 {
3650 if (dai->driver && dai->driver->ops->set_tristate)
3651 return dai->driver->ops->set_tristate(dai, tristate);
3652 else
3653 return -EINVAL;
3654 }
3655 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3656
3657 /**
3658 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3659 * @dai: DAI
3660 * @mute: mute enable
3661 * @direction: stream to mute
3662 *
3663 * Mutes the DAI DAC.
3664 */
3665 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
3666 int direction)
3667 {
3668 if (!dai->driver)
3669 return -ENOTSUPP;
3670
3671 if (dai->driver->ops->mute_stream)
3672 return dai->driver->ops->mute_stream(dai, mute, direction);
3673 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
3674 dai->driver->ops->digital_mute)
3675 return dai->driver->ops->digital_mute(dai, mute);
3676 else
3677 return -ENOTSUPP;
3678 }
3679 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3680
3681 /**
3682 * snd_soc_register_card - Register a card with the ASoC core
3683 *
3684 * @card: Card to register
3685 *
3686 */
3687 int snd_soc_register_card(struct snd_soc_card *card)
3688 {
3689 int i, ret;
3690
3691 if (!card->name || !card->dev)
3692 return -EINVAL;
3693
3694 for (i = 0; i < card->num_links; i++) {
3695 struct snd_soc_dai_link *link = &card->dai_link[i];
3696
3697 /*
3698 * Codec must be specified by 1 of name or OF node,
3699 * not both or neither.
3700 */
3701 if (!!link->codec_name == !!link->codec_of_node) {
3702 dev_err(card->dev,
3703 "ASoC: Neither/both codec name/of_node are set for %s\n",
3704 link->name);
3705 return -EINVAL;
3706 }
3707 /* Codec DAI name must be specified */
3708 if (!link->codec_dai_name) {
3709 dev_err(card->dev,
3710 "ASoC: codec_dai_name not set for %s\n",
3711 link->name);
3712 return -EINVAL;
3713 }
3714
3715 /*
3716 * Platform may be specified by either name or OF node, but
3717 * can be left unspecified, and a dummy platform will be used.
3718 */
3719 if (link->platform_name && link->platform_of_node) {
3720 dev_err(card->dev,
3721 "ASoC: Both platform name/of_node are set for %s\n",
3722 link->name);
3723 return -EINVAL;
3724 }
3725
3726 /*
3727 * CPU device may be specified by either name or OF node, but
3728 * can be left unspecified, and will be matched based on DAI
3729 * name alone..
3730 */
3731 if (link->cpu_name && link->cpu_of_node) {
3732 dev_err(card->dev,
3733 "ASoC: Neither/both cpu name/of_node are set for %s\n",
3734 link->name);
3735 return -EINVAL;
3736 }
3737 /*
3738 * At least one of CPU DAI name or CPU device name/node must be
3739 * specified
3740 */
3741 if (!link->cpu_dai_name &&
3742 !(link->cpu_name || link->cpu_of_node)) {
3743 dev_err(card->dev,
3744 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
3745 link->name);
3746 return -EINVAL;
3747 }
3748 }
3749
3750 dev_set_drvdata(card->dev, card);
3751
3752 snd_soc_initialize_card_lists(card);
3753
3754 soc_init_card_debugfs(card);
3755
3756 card->rtd = devm_kzalloc(card->dev,
3757 sizeof(struct snd_soc_pcm_runtime) *
3758 (card->num_links + card->num_aux_devs),
3759 GFP_KERNEL);
3760 if (card->rtd == NULL)
3761 return -ENOMEM;
3762 card->num_rtd = 0;
3763 card->rtd_aux = &card->rtd[card->num_links];
3764
3765 for (i = 0; i < card->num_links; i++)
3766 card->rtd[i].dai_link = &card->dai_link[i];
3767
3768 INIT_LIST_HEAD(&card->list);
3769 INIT_LIST_HEAD(&card->dapm_dirty);
3770 card->instantiated = 0;
3771 mutex_init(&card->mutex);
3772 mutex_init(&card->dapm_mutex);
3773
3774 ret = snd_soc_instantiate_card(card);
3775 if (ret != 0)
3776 soc_cleanup_card_debugfs(card);
3777
3778 return ret;
3779 }
3780 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3781
3782 /**
3783 * snd_soc_unregister_card - Unregister a card with the ASoC core
3784 *
3785 * @card: Card to unregister
3786 *
3787 */
3788 int snd_soc_unregister_card(struct snd_soc_card *card)
3789 {
3790 if (card->instantiated)
3791 soc_cleanup_card_resources(card);
3792 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3793
3794 return 0;
3795 }
3796 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3797
3798 /*
3799 * Simplify DAI link configuration by removing ".-1" from device names
3800 * and sanitizing names.
3801 */
3802 static char *fmt_single_name(struct device *dev, int *id)
3803 {
3804 char *found, name[NAME_SIZE];
3805 int id1, id2;
3806
3807 if (dev_name(dev) == NULL)
3808 return NULL;
3809
3810 strlcpy(name, dev_name(dev), NAME_SIZE);
3811
3812 /* are we a "%s.%d" name (platform and SPI components) */
3813 found = strstr(name, dev->driver->name);
3814 if (found) {
3815 /* get ID */
3816 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3817
3818 /* discard ID from name if ID == -1 */
3819 if (*id == -1)
3820 found[strlen(dev->driver->name)] = '\0';
3821 }
3822
3823 } else {
3824 /* I2C component devices are named "bus-addr" */
3825 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3826 char tmp[NAME_SIZE];
3827
3828 /* create unique ID number from I2C addr and bus */
3829 *id = ((id1 & 0xffff) << 16) + id2;
3830
3831 /* sanitize component name for DAI link creation */
3832 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3833 strlcpy(name, tmp, NAME_SIZE);
3834 } else
3835 *id = 0;
3836 }
3837
3838 return kstrdup(name, GFP_KERNEL);
3839 }
3840
3841 /*
3842 * Simplify DAI link naming for single devices with multiple DAIs by removing
3843 * any ".-1" and using the DAI name (instead of device name).
3844 */
3845 static inline char *fmt_multiple_name(struct device *dev,
3846 struct snd_soc_dai_driver *dai_drv)
3847 {
3848 if (dai_drv->name == NULL) {
3849 dev_err(dev,
3850 "ASoC: error - multiple DAI %s registered with no name\n",
3851 dev_name(dev));
3852 return NULL;
3853 }
3854
3855 return kstrdup(dai_drv->name, GFP_KERNEL);
3856 }
3857
3858 /**
3859 * snd_soc_register_dai - Register a DAI with the ASoC core
3860 *
3861 * @dai: DAI to register
3862 */
3863 static int snd_soc_register_dai(struct device *dev,
3864 struct snd_soc_dai_driver *dai_drv)
3865 {
3866 struct snd_soc_codec *codec;
3867 struct snd_soc_dai *dai;
3868
3869 dev_dbg(dev, "ASoC: dai register %s\n", dev_name(dev));
3870
3871 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3872 if (dai == NULL)
3873 return -ENOMEM;
3874
3875 /* create DAI component name */
3876 dai->name = fmt_single_name(dev, &dai->id);
3877 if (dai->name == NULL) {
3878 kfree(dai);
3879 return -ENOMEM;
3880 }
3881
3882 dai->dev = dev;
3883 dai->driver = dai_drv;
3884 dai->dapm.dev = dev;
3885 if (!dai->driver->ops)
3886 dai->driver->ops = &null_dai_ops;
3887
3888 mutex_lock(&client_mutex);
3889
3890 list_for_each_entry(codec, &codec_list, list) {
3891 if (codec->dev == dev) {
3892 dev_dbg(dev, "ASoC: Mapped DAI %s to CODEC %s\n",
3893 dai->name, codec->name);
3894 dai->codec = codec;
3895 break;
3896 }
3897 }
3898
3899 if (!dai->codec)
3900 dai->dapm.idle_bias_off = 1;
3901
3902 list_add(&dai->list, &dai_list);
3903
3904 mutex_unlock(&client_mutex);
3905
3906 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3907
3908 return 0;
3909 }
3910
3911 /**
3912 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3913 *
3914 * @dai: DAI to unregister
3915 */
3916 static void snd_soc_unregister_dai(struct device *dev)
3917 {
3918 struct snd_soc_dai *dai;
3919
3920 list_for_each_entry(dai, &dai_list, list) {
3921 if (dev == dai->dev)
3922 goto found;
3923 }
3924 return;
3925
3926 found:
3927 mutex_lock(&client_mutex);
3928 list_del(&dai->list);
3929 mutex_unlock(&client_mutex);
3930
3931 dev_dbg(dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
3932 kfree(dai->name);
3933 kfree(dai);
3934 }
3935
3936 /**
3937 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3938 *
3939 * @dai: Array of DAIs to register
3940 * @count: Number of DAIs
3941 */
3942 static int snd_soc_register_dais(struct device *dev,
3943 struct snd_soc_dai_driver *dai_drv, size_t count)
3944 {
3945 struct snd_soc_codec *codec;
3946 struct snd_soc_dai *dai;
3947 int i, ret = 0;
3948
3949 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
3950
3951 for (i = 0; i < count; i++) {
3952
3953 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3954 if (dai == NULL) {
3955 ret = -ENOMEM;
3956 goto err;
3957 }
3958
3959 /* create DAI component name */
3960 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3961 if (dai->name == NULL) {
3962 kfree(dai);
3963 ret = -EINVAL;
3964 goto err;
3965 }
3966
3967 dai->dev = dev;
3968 dai->driver = &dai_drv[i];
3969 if (dai->driver->id)
3970 dai->id = dai->driver->id;
3971 else
3972 dai->id = i;
3973 dai->dapm.dev = dev;
3974 if (!dai->driver->ops)
3975 dai->driver->ops = &null_dai_ops;
3976
3977 mutex_lock(&client_mutex);
3978
3979 list_for_each_entry(codec, &codec_list, list) {
3980 if (codec->dev == dev) {
3981 dev_dbg(dev,
3982 "ASoC: Mapped DAI %s to CODEC %s\n",
3983 dai->name, codec->name);
3984 dai->codec = codec;
3985 break;
3986 }
3987 }
3988
3989 if (!dai->codec)
3990 dai->dapm.idle_bias_off = 1;
3991
3992 list_add(&dai->list, &dai_list);
3993
3994 mutex_unlock(&client_mutex);
3995
3996 dev_dbg(dai->dev, "ASoC: Registered DAI '%s'\n", dai->name);
3997 }
3998
3999 return 0;
4000
4001 err:
4002 for (i--; i >= 0; i--)
4003 snd_soc_unregister_dai(dev);
4004
4005 return ret;
4006 }
4007
4008 /**
4009 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
4010 *
4011 * @dai: Array of DAIs to unregister
4012 * @count: Number of DAIs
4013 */
4014 static void snd_soc_unregister_dais(struct device *dev, size_t count)
4015 {
4016 int i;
4017
4018 for (i = 0; i < count; i++)
4019 snd_soc_unregister_dai(dev);
4020 }
4021
4022 /**
4023 * snd_soc_add_platform - Add a platform to the ASoC core
4024 * @dev: The parent device for the platform
4025 * @platform: The platform to add
4026 * @platform_driver: The driver for the platform
4027 */
4028 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
4029 const struct snd_soc_platform_driver *platform_drv)
4030 {
4031 /* create platform component name */
4032 platform->name = fmt_single_name(dev, &platform->id);
4033 if (platform->name == NULL)
4034 return -ENOMEM;
4035
4036 platform->dev = dev;
4037 platform->driver = platform_drv;
4038 platform->dapm.dev = dev;
4039 platform->dapm.platform = platform;
4040 platform->dapm.stream_event = platform_drv->stream_event;
4041 mutex_init(&platform->mutex);
4042
4043 mutex_lock(&client_mutex);
4044 list_add(&platform->list, &platform_list);
4045 mutex_unlock(&client_mutex);
4046
4047 dev_dbg(dev, "ASoC: Registered platform '%s'\n", platform->name);
4048
4049 return 0;
4050 }
4051 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
4052
4053 /**
4054 * snd_soc_register_platform - Register a platform with the ASoC core
4055 *
4056 * @platform: platform to register
4057 */
4058 int snd_soc_register_platform(struct device *dev,
4059 const struct snd_soc_platform_driver *platform_drv)
4060 {
4061 struct snd_soc_platform *platform;
4062 int ret;
4063
4064 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
4065
4066 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
4067 if (platform == NULL)
4068 return -ENOMEM;
4069
4070 ret = snd_soc_add_platform(dev, platform, platform_drv);
4071 if (ret)
4072 kfree(platform);
4073
4074 return ret;
4075 }
4076 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
4077
4078 /**
4079 * snd_soc_remove_platform - Remove a platform from the ASoC core
4080 * @platform: the platform to remove
4081 */
4082 void snd_soc_remove_platform(struct snd_soc_platform *platform)
4083 {
4084 mutex_lock(&client_mutex);
4085 list_del(&platform->list);
4086 mutex_unlock(&client_mutex);
4087
4088 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
4089 platform->name);
4090 kfree(platform->name);
4091 }
4092 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
4093
4094 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
4095 {
4096 struct snd_soc_platform *platform;
4097
4098 list_for_each_entry(platform, &platform_list, list) {
4099 if (dev == platform->dev)
4100 return platform;
4101 }
4102
4103 return NULL;
4104 }
4105 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
4106
4107 /**
4108 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
4109 *
4110 * @platform: platform to unregister
4111 */
4112 void snd_soc_unregister_platform(struct device *dev)
4113 {
4114 struct snd_soc_platform *platform;
4115
4116 platform = snd_soc_lookup_platform(dev);
4117 if (!platform)
4118 return;
4119
4120 snd_soc_remove_platform(platform);
4121 kfree(platform);
4122 }
4123 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
4124
4125 static u64 codec_format_map[] = {
4126 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
4127 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
4128 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
4129 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
4130 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
4131 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
4132 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4133 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4134 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
4135 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
4136 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
4137 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
4138 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
4139 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
4140 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
4141 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
4142 };
4143
4144 /* Fix up the DAI formats for endianness: codecs don't actually see
4145 * the endianness of the data but we're using the CPU format
4146 * definitions which do need to include endianness so we ensure that
4147 * codec DAIs always have both big and little endian variants set.
4148 */
4149 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
4150 {
4151 int i;
4152
4153 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
4154 if (stream->formats & codec_format_map[i])
4155 stream->formats |= codec_format_map[i];
4156 }
4157
4158 /**
4159 * snd_soc_register_codec - Register a codec with the ASoC core
4160 *
4161 * @codec: codec to register
4162 */
4163 int snd_soc_register_codec(struct device *dev,
4164 const struct snd_soc_codec_driver *codec_drv,
4165 struct snd_soc_dai_driver *dai_drv,
4166 int num_dai)
4167 {
4168 size_t reg_size;
4169 struct snd_soc_codec *codec;
4170 int ret, i;
4171
4172 dev_dbg(dev, "codec register %s\n", dev_name(dev));
4173
4174 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
4175 if (codec == NULL)
4176 return -ENOMEM;
4177
4178 /* create CODEC component name */
4179 codec->name = fmt_single_name(dev, &codec->id);
4180 if (codec->name == NULL) {
4181 ret = -ENOMEM;
4182 goto fail_codec;
4183 }
4184
4185 if (codec_drv->compress_type)
4186 codec->compress_type = codec_drv->compress_type;
4187 else
4188 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
4189
4190 codec->write = codec_drv->write;
4191 codec->read = codec_drv->read;
4192 codec->volatile_register = codec_drv->volatile_register;
4193 codec->readable_register = codec_drv->readable_register;
4194 codec->writable_register = codec_drv->writable_register;
4195 codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
4196 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
4197 codec->dapm.dev = dev;
4198 codec->dapm.codec = codec;
4199 codec->dapm.seq_notifier = codec_drv->seq_notifier;
4200 codec->dapm.stream_event = codec_drv->stream_event;
4201 codec->dev = dev;
4202 codec->driver = codec_drv;
4203 codec->num_dai = num_dai;
4204 mutex_init(&codec->mutex);
4205
4206 /* allocate CODEC register cache */
4207 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
4208 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
4209 codec->reg_size = reg_size;
4210 /* it is necessary to make a copy of the default register cache
4211 * because in the case of using a compression type that requires
4212 * the default register cache to be marked as the
4213 * kernel might have freed the array by the time we initialize
4214 * the cache.
4215 */
4216 if (codec_drv->reg_cache_default) {
4217 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
4218 reg_size, GFP_KERNEL);
4219 if (!codec->reg_def_copy) {
4220 ret = -ENOMEM;
4221 goto fail_codec_name;
4222 }
4223 }
4224 }
4225
4226 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
4227 if (!codec->volatile_register)
4228 codec->volatile_register = snd_soc_default_volatile_register;
4229 if (!codec->readable_register)
4230 codec->readable_register = snd_soc_default_readable_register;
4231 if (!codec->writable_register)
4232 codec->writable_register = snd_soc_default_writable_register;
4233 }
4234
4235 for (i = 0; i < num_dai; i++) {
4236 fixup_codec_formats(&dai_drv[i].playback);
4237 fixup_codec_formats(&dai_drv[i].capture);
4238 }
4239
4240 mutex_lock(&client_mutex);
4241 list_add(&codec->list, &codec_list);
4242 mutex_unlock(&client_mutex);
4243
4244 /* register any DAIs */
4245 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4246 if (ret < 0) {
4247 dev_err(codec->dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4248 goto fail_codec_name;
4249 }
4250
4251 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", codec->name);
4252 return 0;
4253
4254 fail_codec_name:
4255 mutex_lock(&client_mutex);
4256 list_del(&codec->list);
4257 mutex_unlock(&client_mutex);
4258
4259 kfree(codec->name);
4260 fail_codec:
4261 kfree(codec);
4262 return ret;
4263 }
4264 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4265
4266 /**
4267 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4268 *
4269 * @codec: codec to unregister
4270 */
4271 void snd_soc_unregister_codec(struct device *dev)
4272 {
4273 struct snd_soc_codec *codec;
4274
4275 list_for_each_entry(codec, &codec_list, list) {
4276 if (dev == codec->dev)
4277 goto found;
4278 }
4279 return;
4280
4281 found:
4282 snd_soc_unregister_dais(dev, codec->num_dai);
4283
4284 mutex_lock(&client_mutex);
4285 list_del(&codec->list);
4286 mutex_unlock(&client_mutex);
4287
4288 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
4289
4290 snd_soc_cache_exit(codec);
4291 kfree(codec->reg_def_copy);
4292 kfree(codec->name);
4293 kfree(codec);
4294 }
4295 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4296
4297
4298 /**
4299 * snd_soc_register_component - Register a component with the ASoC core
4300 *
4301 */
4302 int snd_soc_register_component(struct device *dev,
4303 const struct snd_soc_component_driver *cmpnt_drv,
4304 struct snd_soc_dai_driver *dai_drv,
4305 int num_dai)
4306 {
4307 struct snd_soc_component *cmpnt;
4308 int ret;
4309
4310 dev_dbg(dev, "component register %s\n", dev_name(dev));
4311
4312 cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
4313 if (!cmpnt) {
4314 dev_err(dev, "ASoC: Failed to allocate memory\n");
4315 return -ENOMEM;
4316 }
4317
4318 cmpnt->name = fmt_single_name(dev, &cmpnt->id);
4319 if (!cmpnt->name) {
4320 dev_err(dev, "ASoC: Failed to simplifying name\n");
4321 return -ENOMEM;
4322 }
4323
4324 cmpnt->dev = dev;
4325 cmpnt->driver = cmpnt_drv;
4326 cmpnt->num_dai = num_dai;
4327
4328 /*
4329 * snd_soc_register_dai() uses fmt_single_name(), and
4330 * snd_soc_register_dais() uses fmt_multiple_name()
4331 * for dai->name which is used for name based matching
4332 */
4333 if (1 == num_dai)
4334 ret = snd_soc_register_dai(dev, dai_drv);
4335 else
4336 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4337 if (ret < 0) {
4338 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4339 goto error_component_name;
4340 }
4341
4342 mutex_lock(&client_mutex);
4343 list_add(&cmpnt->list, &component_list);
4344 mutex_unlock(&client_mutex);
4345
4346 dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);
4347
4348 return ret;
4349
4350 error_component_name:
4351 kfree(cmpnt->name);
4352
4353 return ret;
4354 }
4355 EXPORT_SYMBOL_GPL(snd_soc_register_component);
4356
4357 /**
4358 * snd_soc_unregister_component - Unregister a component from the ASoC core
4359 *
4360 */
4361 void snd_soc_unregister_component(struct device *dev)
4362 {
4363 struct snd_soc_component *cmpnt;
4364
4365 list_for_each_entry(cmpnt, &component_list, list) {
4366 if (dev == cmpnt->dev)
4367 goto found;
4368 }
4369 return;
4370
4371 found:
4372 snd_soc_unregister_dais(dev, cmpnt->num_dai);
4373
4374 mutex_lock(&client_mutex);
4375 list_del(&cmpnt->list);
4376 mutex_unlock(&client_mutex);
4377
4378 dev_dbg(dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
4379 kfree(cmpnt->name);
4380 }
4381 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
4382
4383 /* Retrieve a card's name from device tree */
4384 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4385 const char *propname)
4386 {
4387 struct device_node *np = card->dev->of_node;
4388 int ret;
4389
4390 ret = of_property_read_string_index(np, propname, 0, &card->name);
4391 /*
4392 * EINVAL means the property does not exist. This is fine providing
4393 * card->name was previously set, which is checked later in
4394 * snd_soc_register_card.
4395 */
4396 if (ret < 0 && ret != -EINVAL) {
4397 dev_err(card->dev,
4398 "ASoC: Property '%s' could not be read: %d\n",
4399 propname, ret);
4400 return ret;
4401 }
4402
4403 return 0;
4404 }
4405 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4406
4407 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4408 const char *propname)
4409 {
4410 struct device_node *np = card->dev->of_node;
4411 int num_routes;
4412 struct snd_soc_dapm_route *routes;
4413 int i, ret;
4414
4415 num_routes = of_property_count_strings(np, propname);
4416 if (num_routes < 0 || num_routes & 1) {
4417 dev_err(card->dev,
4418 "ASoC: Property '%s' does not exist or its length is not even\n",
4419 propname);
4420 return -EINVAL;
4421 }
4422 num_routes /= 2;
4423 if (!num_routes) {
4424 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4425 propname);
4426 return -EINVAL;
4427 }
4428
4429 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4430 GFP_KERNEL);
4431 if (!routes) {
4432 dev_err(card->dev,
4433 "ASoC: Could not allocate DAPM route table\n");
4434 return -EINVAL;
4435 }
4436
4437 for (i = 0; i < num_routes; i++) {
4438 ret = of_property_read_string_index(np, propname,
4439 2 * i, &routes[i].sink);
4440 if (ret) {
4441 dev_err(card->dev,
4442 "ASoC: Property '%s' index %d could not be read: %d\n",
4443 propname, 2 * i, ret);
4444 return -EINVAL;
4445 }
4446 ret = of_property_read_string_index(np, propname,
4447 (2 * i) + 1, &routes[i].source);
4448 if (ret) {
4449 dev_err(card->dev,
4450 "ASoC: Property '%s' index %d could not be read: %d\n",
4451 propname, (2 * i) + 1, ret);
4452 return -EINVAL;
4453 }
4454 }
4455
4456 card->num_dapm_routes = num_routes;
4457 card->dapm_routes = routes;
4458
4459 return 0;
4460 }
4461 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4462
4463 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4464 const char *prefix)
4465 {
4466 int ret, i;
4467 char prop[128];
4468 unsigned int format = 0;
4469 int bit, frame;
4470 const char *str;
4471 struct {
4472 char *name;
4473 unsigned int val;
4474 } of_fmt_table[] = {
4475 { "i2s", SND_SOC_DAIFMT_I2S },
4476 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
4477 { "left_j", SND_SOC_DAIFMT_LEFT_J },
4478 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
4479 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
4480 { "ac97", SND_SOC_DAIFMT_AC97 },
4481 { "pdm", SND_SOC_DAIFMT_PDM},
4482 { "msb", SND_SOC_DAIFMT_MSB },
4483 { "lsb", SND_SOC_DAIFMT_LSB },
4484 };
4485
4486 if (!prefix)
4487 prefix = "";
4488
4489 /*
4490 * check "[prefix]format = xxx"
4491 * SND_SOC_DAIFMT_FORMAT_MASK area
4492 */
4493 snprintf(prop, sizeof(prop), "%sformat", prefix);
4494 ret = of_property_read_string(np, prop, &str);
4495 if (ret == 0) {
4496 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4497 if (strcmp(str, of_fmt_table[i].name) == 0) {
4498 format |= of_fmt_table[i].val;
4499 break;
4500 }
4501 }
4502 }
4503
4504 /*
4505 * check "[prefix]continuous-clock"
4506 * SND_SOC_DAIFMT_CLOCK_MASK area
4507 */
4508 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4509 if (of_get_property(np, prop, NULL))
4510 format |= SND_SOC_DAIFMT_CONT;
4511 else
4512 format |= SND_SOC_DAIFMT_GATED;
4513
4514 /*
4515 * check "[prefix]bitclock-inversion"
4516 * check "[prefix]frame-inversion"
4517 * SND_SOC_DAIFMT_INV_MASK area
4518 */
4519 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4520 bit = !!of_get_property(np, prop, NULL);
4521
4522 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4523 frame = !!of_get_property(np, prop, NULL);
4524
4525 switch ((bit << 4) + frame) {
4526 case 0x11:
4527 format |= SND_SOC_DAIFMT_IB_IF;
4528 break;
4529 case 0x10:
4530 format |= SND_SOC_DAIFMT_IB_NF;
4531 break;
4532 case 0x01:
4533 format |= SND_SOC_DAIFMT_NB_IF;
4534 break;
4535 default:
4536 /* SND_SOC_DAIFMT_NB_NF is default */
4537 break;
4538 }
4539
4540 /*
4541 * check "[prefix]bitclock-master"
4542 * check "[prefix]frame-master"
4543 * SND_SOC_DAIFMT_MASTER_MASK area
4544 */
4545 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4546 bit = !!of_get_property(np, prop, NULL);
4547
4548 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4549 frame = !!of_get_property(np, prop, NULL);
4550
4551 switch ((bit << 4) + frame) {
4552 case 0x11:
4553 format |= SND_SOC_DAIFMT_CBM_CFM;
4554 break;
4555 case 0x10:
4556 format |= SND_SOC_DAIFMT_CBM_CFS;
4557 break;
4558 case 0x01:
4559 format |= SND_SOC_DAIFMT_CBS_CFM;
4560 break;
4561 default:
4562 format |= SND_SOC_DAIFMT_CBS_CFS;
4563 break;
4564 }
4565
4566 return format;
4567 }
4568 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4569
4570 static int __init snd_soc_init(void)
4571 {
4572 #ifdef CONFIG_DEBUG_FS
4573 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4574 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4575 pr_warn("ASoC: Failed to create debugfs directory\n");
4576 snd_soc_debugfs_root = NULL;
4577 }
4578
4579 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4580 &codec_list_fops))
4581 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4582
4583 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4584 &dai_list_fops))
4585 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4586
4587 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4588 &platform_list_fops))
4589 pr_warn("ASoC: Failed to create platform list debugfs file\n");
4590 #endif
4591
4592 snd_soc_util_init();
4593
4594 return platform_driver_register(&soc_driver);
4595 }
4596 module_init(snd_soc_init);
4597
4598 static void __exit snd_soc_exit(void)
4599 {
4600 snd_soc_util_exit();
4601
4602 #ifdef CONFIG_DEBUG_FS
4603 debugfs_remove_recursive(snd_soc_debugfs_root);
4604 #endif
4605 platform_driver_unregister(&soc_driver);
4606 }
4607 module_exit(snd_soc_exit);
4608
4609 /* Module information */
4610 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4611 MODULE_DESCRIPTION("ALSA SoC Core");
4612 MODULE_LICENSE("GPL");
4613 MODULE_ALIAS("platform:soc-audio");
Linux with added FPC-III support