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

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