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TOMOYO Linux Cross Reference
Linux/sound/soc/soc-core.c

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  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");
4614 

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