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

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