Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/sound/soc/soc-core.c

  1 /*
  2  * soc-core.c  --  ALSA SoC Audio Layer
  3  *
  4  * Copyright 2005 Wolfson Microelectronics PLC.
  5  * Copyright 2005 Openedhand Ltd.
  6  * Copyright (C) 2010 Slimlogic Ltd.
  7  * Copyright (C) 2010 Texas Instruments Inc.
  8  *
  9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 10  *         with code, comments and ideas from :-
 11  *         Richard Purdie <richard@openedhand.com>
 12  *
 13  *  This program is free software; you can redistribute  it and/or modify it
 14  *  under  the terms of  the GNU General  Public License as published by the
 15  *  Free Software Foundation;  either version 2 of the  License, or (at your
 16  *  option) any later version.
 17  *
 18  *  TODO:
 19  *   o Add hw rules to enforce rates, etc.
 20  *   o More testing with other codecs/machines.
 21  *   o Add more codecs and platforms to ensure good API coverage.
 22  *   o Support TDM on PCM and I2S
 23  */
 24 
 25 #include <linux/module.h>
 26 #include <linux/moduleparam.h>
 27 #include <linux/init.h>
 28 #include <linux/delay.h>
 29 #include <linux/pm.h>
 30 #include <linux/bitops.h>
 31 #include <linux/debugfs.h>
 32 #include <linux/platform_device.h>
 33 #include <linux/pinctrl/consumer.h>
 34 #include <linux/ctype.h>
 35 #include <linux/slab.h>
 36 #include <linux/of.h>
 37 #include <linux/gpio.h>
 38 #include <linux/of_gpio.h>
 39 #include <sound/ac97_codec.h>
 40 #include <sound/core.h>
 41 #include <sound/jack.h>
 42 #include <sound/pcm.h>
 43 #include <sound/pcm_params.h>
 44 #include <sound/soc.h>
 45 #include <sound/soc-dpcm.h>
 46 #include <sound/initval.h>
 47 
 48 #define CREATE_TRACE_POINTS
 49 #include <trace/events/asoc.h>
 50 
 51 #define NAME_SIZE       32
 52 
 53 #ifdef CONFIG_DEBUG_FS
 54 struct dentry *snd_soc_debugfs_root;
 55 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
 56 #endif
 57 
 58 static DEFINE_MUTEX(client_mutex);
 59 static LIST_HEAD(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 struct snd_ac97_reset_cfg {
 73         struct pinctrl *pctl;
 74         struct pinctrl_state *pstate_reset;
 75         struct pinctrl_state *pstate_warm_reset;
 76         struct pinctrl_state *pstate_run;
 77         int gpio_sdata;
 78         int gpio_sync;
 79         int gpio_reset;
 80 };
 81 
 82 /* returns the minimum number of bytes needed to represent
 83  * a particular given value */
 84 static int min_bytes_needed(unsigned long val)
 85 {
 86         int c = 0;
 87         int i;
 88 
 89         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
 90                 if (val & (1UL << i))
 91                         break;
 92         c = (sizeof val * 8) - c;
 93         if (!c || (c % 8))
 94                 c = (c + 8) / 8;
 95         else
 96                 c /= 8;
 97         return c;
 98 }
 99 
100 /* fill buf which is 'len' bytes with a formatted
101  * string of the form 'reg: value\n' */
102 static int format_register_str(struct snd_soc_codec *codec,
103                                unsigned int reg, char *buf, size_t len)
104 {
105         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
106         int regsize = codec->driver->reg_word_size * 2;
107         int ret;
108         char tmpbuf[len + 1];
109         char regbuf[regsize + 1];
110 
111         /* since tmpbuf is allocated on the stack, warn the callers if they
112          * try to abuse this function */
113         WARN_ON(len > 63);
114 
115         /* +2 for ': ' and + 1 for '\n' */
116         if (wordsize + regsize + 2 + 1 != len)
117                 return -EINVAL;
118 
119         ret = snd_soc_read(codec, reg);
120         if (ret < 0) {
121                 memset(regbuf, 'X', regsize);
122                 regbuf[regsize] = '\0';
123         } else {
124                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
125         }
126 
127         /* prepare the buffer */
128         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
129         /* copy it back to the caller without the '\0' */
130         memcpy(buf, tmpbuf, len);
131 
132         return 0;
133 }
134 
135 /* codec register dump */
136 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
137                                   size_t count, loff_t pos)
138 {
139         int i, step = 1;
140         int wordsize, regsize;
141         int len;
142         size_t total = 0;
143         loff_t p = 0;
144 
145         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
146         regsize = codec->driver->reg_word_size * 2;
147 
148         len = wordsize + regsize + 2 + 1;
149 
150         if (!codec->driver->reg_cache_size)
151                 return 0;
152 
153         if (codec->driver->reg_cache_step)
154                 step = codec->driver->reg_cache_step;
155 
156         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
157                 /* only support larger than PAGE_SIZE bytes debugfs
158                  * entries for the default case */
159                 if (p >= pos) {
160                         if (total + len >= count - 1)
161                                 break;
162                         format_register_str(codec, i, buf + total, len);
163                         total += len;
164                 }
165                 p += len;
166         }
167 
168         total = min(total, count - 1);
169 
170         return total;
171 }
172 
173 static ssize_t codec_reg_show(struct device *dev,
174         struct device_attribute *attr, char *buf)
175 {
176         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
177 
178         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
179 }
180 
181 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
182 
183 static ssize_t pmdown_time_show(struct device *dev,
184                                 struct device_attribute *attr, char *buf)
185 {
186         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
187 
188         return sprintf(buf, "%ld\n", rtd->pmdown_time);
189 }
190 
191 static ssize_t pmdown_time_set(struct device *dev,
192                                struct device_attribute *attr,
193                                const char *buf, size_t count)
194 {
195         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
196         int ret;
197 
198         ret = kstrtol(buf, 10, &rtd->pmdown_time);
199         if (ret)
200                 return ret;
201 
202         return count;
203 }
204 
205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206 
207 #ifdef CONFIG_DEBUG_FS
208 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
209                                    size_t count, loff_t *ppos)
210 {
211         ssize_t ret;
212         struct snd_soc_codec *codec = file->private_data;
213         char *buf;
214 
215         if (*ppos < 0 || !count)
216                 return -EINVAL;
217 
218         buf = kmalloc(count, GFP_KERNEL);
219         if (!buf)
220                 return -ENOMEM;
221 
222         ret = soc_codec_reg_show(codec, buf, count, *ppos);
223         if (ret >= 0) {
224                 if (copy_to_user(user_buf, buf, ret)) {
225                         kfree(buf);
226                         return -EFAULT;
227                 }
228                 *ppos += ret;
229         }
230 
231         kfree(buf);
232         return ret;
233 }
234 
235 static ssize_t codec_reg_write_file(struct file *file,
236                 const char __user *user_buf, size_t count, loff_t *ppos)
237 {
238         char buf[32];
239         size_t buf_size;
240         char *start = buf;
241         unsigned long reg, value;
242         struct snd_soc_codec *codec = file->private_data;
243         int ret;
244 
245         buf_size = min(count, (sizeof(buf)-1));
246         if (copy_from_user(buf, user_buf, buf_size))
247                 return -EFAULT;
248         buf[buf_size] = 0;
249 
250         while (*start == ' ')
251                 start++;
252         reg = simple_strtoul(start, &start, 16);
253         while (*start == ' ')
254                 start++;
255         ret = kstrtoul(start, 16, &value);
256         if (ret)
257                 return ret;
258 
259         /* Userspace has been fiddling around behind the kernel's back */
260         add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
261 
262         snd_soc_write(codec, reg, value);
263         return buf_size;
264 }
265 
266 static const struct file_operations codec_reg_fops = {
267         .open = simple_open,
268         .read = codec_reg_read_file,
269         .write = codec_reg_write_file,
270         .llseek = default_llseek,
271 };
272 
273 static struct dentry *soc_debugfs_create_dir(struct dentry *parent,
274         const char *fmt, ...)
275 {
276         struct dentry *de;
277         va_list ap;
278         char *s;
279 
280         va_start(ap, fmt);
281         s = kvasprintf(GFP_KERNEL, fmt, ap);
282         va_end(ap);
283 
284         if (!s)
285                 return NULL;
286 
287         de = debugfs_create_dir(s, parent);
288         kfree(s);
289 
290         return de;
291 }
292 
293 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
294 {
295         struct dentry *debugfs_card_root = codec->component.card->debugfs_card_root;
296 
297         codec->debugfs_codec_root = soc_debugfs_create_dir(debugfs_card_root,
298                                                 "codec:%s",
299                                                 codec->component.name);
300         if (!codec->debugfs_codec_root) {
301                 dev_warn(codec->dev,
302                         "ASoC: Failed to create codec debugfs directory\n");
303                 return;
304         }
305 
306         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
307                             &codec->cache_sync);
308         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
309                             &codec->cache_only);
310 
311         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
312                                                  codec->debugfs_codec_root,
313                                                  codec, &codec_reg_fops);
314         if (!codec->debugfs_reg)
315                 dev_warn(codec->dev,
316                         "ASoC: Failed to create codec register debugfs file\n");
317 
318         snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
319 }
320 
321 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
322 {
323         debugfs_remove_recursive(codec->debugfs_codec_root);
324 }
325 
326 static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
327 {
328         struct dentry *debugfs_card_root = platform->component.card->debugfs_card_root;
329 
330         platform->debugfs_platform_root = soc_debugfs_create_dir(debugfs_card_root,
331                                                 "platform:%s",
332                                                 platform->component.name);
333         if (!platform->debugfs_platform_root) {
334                 dev_warn(platform->dev,
335                         "ASoC: Failed to create platform debugfs directory\n");
336                 return;
337         }
338 
339         snd_soc_dapm_debugfs_init(&platform->component.dapm,
340                 platform->debugfs_platform_root);
341 }
342 
343 static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
344 {
345         debugfs_remove_recursive(platform->debugfs_platform_root);
346 }
347 
348 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
349                                     size_t count, loff_t *ppos)
350 {
351         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
352         ssize_t len, ret = 0;
353         struct snd_soc_codec *codec;
354 
355         if (!buf)
356                 return -ENOMEM;
357 
358         list_for_each_entry(codec, &codec_list, list) {
359                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
360                                codec->component.name);
361                 if (len >= 0)
362                         ret += len;
363                 if (ret > PAGE_SIZE) {
364                         ret = PAGE_SIZE;
365                         break;
366                 }
367         }
368 
369         if (ret >= 0)
370                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
371 
372         kfree(buf);
373 
374         return ret;
375 }
376 
377 static const struct file_operations codec_list_fops = {
378         .read = codec_list_read_file,
379         .llseek = default_llseek,/* read accesses f_pos */
380 };
381 
382 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
383                                   size_t count, loff_t *ppos)
384 {
385         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
386         ssize_t len, ret = 0;
387         struct snd_soc_component *component;
388         struct snd_soc_dai *dai;
389 
390         if (!buf)
391                 return -ENOMEM;
392 
393         list_for_each_entry(component, &component_list, list) {
394                 list_for_each_entry(dai, &component->dai_list, list) {
395                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
396                                 dai->name);
397                         if (len >= 0)
398                                 ret += len;
399                         if (ret > PAGE_SIZE) {
400                                 ret = PAGE_SIZE;
401                                 break;
402                         }
403                 }
404         }
405 
406         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
407 
408         kfree(buf);
409 
410         return ret;
411 }
412 
413 static const struct file_operations dai_list_fops = {
414         .read = dai_list_read_file,
415         .llseek = default_llseek,/* read accesses f_pos */
416 };
417 
418 static ssize_t platform_list_read_file(struct file *file,
419                                        char __user *user_buf,
420                                        size_t count, loff_t *ppos)
421 {
422         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
423         ssize_t len, ret = 0;
424         struct snd_soc_platform *platform;
425 
426         if (!buf)
427                 return -ENOMEM;
428 
429         list_for_each_entry(platform, &platform_list, list) {
430                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
431                                platform->component.name);
432                 if (len >= 0)
433                         ret += len;
434                 if (ret > PAGE_SIZE) {
435                         ret = PAGE_SIZE;
436                         break;
437                 }
438         }
439 
440         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
441 
442         kfree(buf);
443 
444         return ret;
445 }
446 
447 static const struct file_operations platform_list_fops = {
448         .read = platform_list_read_file,
449         .llseek = default_llseek,/* read accesses f_pos */
450 };
451 
452 static void soc_init_card_debugfs(struct snd_soc_card *card)
453 {
454         card->debugfs_card_root = debugfs_create_dir(card->name,
455                                                      snd_soc_debugfs_root);
456         if (!card->debugfs_card_root) {
457                 dev_warn(card->dev,
458                          "ASoC: Failed to create card debugfs directory\n");
459                 return;
460         }
461 
462         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
463                                                     card->debugfs_card_root,
464                                                     &card->pop_time);
465         if (!card->debugfs_pop_time)
466                 dev_warn(card->dev,
467                        "ASoC: Failed to create pop time debugfs file\n");
468 }
469 
470 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
471 {
472         debugfs_remove_recursive(card->debugfs_card_root);
473 }
474 
475 #else
476 
477 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
478 {
479 }
480 
481 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
482 {
483 }
484 
485 static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
486 {
487 }
488 
489 static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
490 {
491 }
492 
493 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
494 {
495 }
496 
497 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
498 {
499 }
500 #endif
501 
502 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
503                 const char *dai_link, int stream)
504 {
505         int i;
506 
507         for (i = 0; i < card->num_links; i++) {
508                 if (card->rtd[i].dai_link->no_pcm &&
509                         !strcmp(card->rtd[i].dai_link->name, dai_link))
510                         return card->rtd[i].pcm->streams[stream].substream;
511         }
512         dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
513         return NULL;
514 }
515 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
516 
517 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
518                 const char *dai_link)
519 {
520         int i;
521 
522         for (i = 0; i < card->num_links; i++) {
523                 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
524                         return &card->rtd[i];
525         }
526         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
527         return NULL;
528 }
529 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
530 
531 #ifdef CONFIG_SND_SOC_AC97_BUS
532 /* unregister ac97 codec */
533 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
534 {
535         if (codec->ac97->dev.bus)
536                 device_unregister(&codec->ac97->dev);
537         return 0;
538 }
539 
540 /* stop no dev release warning */
541 static void soc_ac97_device_release(struct device *dev){}
542 
543 /* register ac97 codec to bus */
544 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
545 {
546         int err;
547 
548         codec->ac97->dev.bus = &ac97_bus_type;
549         codec->ac97->dev.parent = codec->component.card->dev;
550         codec->ac97->dev.release = soc_ac97_device_release;
551 
552         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
553                      codec->component.card->snd_card->number, 0,
554                      codec->component.name);
555         err = device_register(&codec->ac97->dev);
556         if (err < 0) {
557                 dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");
558                 codec->ac97->dev.bus = NULL;
559                 return err;
560         }
561         return 0;
562 }
563 #endif
564 
565 static void codec2codec_close_delayed_work(struct work_struct *work)
566 {
567         /* Currently nothing to do for c2c links
568          * Since c2c links are internal nodes in the DAPM graph and
569          * don't interface with the outside world or application layer
570          * we don't have to do any special handling on close.
571          */
572 }
573 
574 #ifdef CONFIG_PM_SLEEP
575 /* powers down audio subsystem for suspend */
576 int snd_soc_suspend(struct device *dev)
577 {
578         struct snd_soc_card *card = dev_get_drvdata(dev);
579         struct snd_soc_codec *codec;
580         int i, j;
581 
582         /* If the initialization of this soc device failed, there is no codec
583          * associated with it. Just bail out in this case.
584          */
585         if (list_empty(&card->codec_dev_list))
586                 return 0;
587 
588         /* Due to the resume being scheduled into a workqueue we could
589         * suspend before that's finished - wait for it to complete.
590          */
591         snd_power_lock(card->snd_card);
592         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
593         snd_power_unlock(card->snd_card);
594 
595         /* we're going to block userspace touching us until resume completes */
596         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
597 
598         /* mute any active DACs */
599         for (i = 0; i < card->num_rtd; i++) {
600 
601                 if (card->rtd[i].dai_link->ignore_suspend)
602                         continue;
603 
604                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
605                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
606                         struct snd_soc_dai_driver *drv = dai->driver;
607 
608                         if (drv->ops->digital_mute && dai->playback_active)
609                                 drv->ops->digital_mute(dai, 1);
610                 }
611         }
612 
613         /* suspend all pcms */
614         for (i = 0; i < card->num_rtd; i++) {
615                 if (card->rtd[i].dai_link->ignore_suspend)
616                         continue;
617 
618                 snd_pcm_suspend_all(card->rtd[i].pcm);
619         }
620 
621         if (card->suspend_pre)
622                 card->suspend_pre(card);
623 
624         for (i = 0; i < card->num_rtd; i++) {
625                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
626                 struct snd_soc_platform *platform = card->rtd[i].platform;
627 
628                 if (card->rtd[i].dai_link->ignore_suspend)
629                         continue;
630 
631                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
632                         cpu_dai->driver->suspend(cpu_dai);
633                 if (platform->driver->suspend && !platform->suspended) {
634                         platform->driver->suspend(cpu_dai);
635                         platform->suspended = 1;
636                 }
637         }
638 
639         /* close any waiting streams and save state */
640         for (i = 0; i < card->num_rtd; i++) {
641                 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
642                 flush_delayed_work(&card->rtd[i].delayed_work);
643                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
644                         codec_dais[j]->codec->dapm.suspend_bias_level =
645                                         codec_dais[j]->codec->dapm.bias_level;
646                 }
647         }
648 
649         for (i = 0; i < card->num_rtd; i++) {
650 
651                 if (card->rtd[i].dai_link->ignore_suspend)
652                         continue;
653 
654                 snd_soc_dapm_stream_event(&card->rtd[i],
655                                           SNDRV_PCM_STREAM_PLAYBACK,
656                                           SND_SOC_DAPM_STREAM_SUSPEND);
657 
658                 snd_soc_dapm_stream_event(&card->rtd[i],
659                                           SNDRV_PCM_STREAM_CAPTURE,
660                                           SND_SOC_DAPM_STREAM_SUSPEND);
661         }
662 
663         /* Recheck all analogue paths too */
664         dapm_mark_io_dirty(&card->dapm);
665         snd_soc_dapm_sync(&card->dapm);
666 
667         /* suspend all CODECs */
668         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
669                 /* If there are paths active then the CODEC will be held with
670                  * bias _ON and should not be suspended. */
671                 if (!codec->suspended && codec->driver->suspend) {
672                         switch (codec->dapm.bias_level) {
673                         case SND_SOC_BIAS_STANDBY:
674                                 /*
675                                  * If the CODEC is capable of idle
676                                  * bias off then being in STANDBY
677                                  * means it's doing something,
678                                  * otherwise fall through.
679                                  */
680                                 if (codec->dapm.idle_bias_off) {
681                                         dev_dbg(codec->dev,
682                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
683                                         break;
684                                 }
685                         case SND_SOC_BIAS_OFF:
686                                 codec->driver->suspend(codec);
687                                 codec->suspended = 1;
688                                 codec->cache_sync = 1;
689                                 if (codec->component.regmap)
690                                         regcache_mark_dirty(codec->component.regmap);
691                                 /* deactivate pins to sleep state */
692                                 pinctrl_pm_select_sleep_state(codec->dev);
693                                 break;
694                         default:
695                                 dev_dbg(codec->dev,
696                                         "ASoC: CODEC is on over suspend\n");
697                                 break;
698                         }
699                 }
700         }
701 
702         for (i = 0; i < card->num_rtd; i++) {
703                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
704 
705                 if (card->rtd[i].dai_link->ignore_suspend)
706                         continue;
707 
708                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
709                         cpu_dai->driver->suspend(cpu_dai);
710 
711                 /* deactivate pins to sleep state */
712                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
713         }
714 
715         if (card->suspend_post)
716                 card->suspend_post(card);
717 
718         return 0;
719 }
720 EXPORT_SYMBOL_GPL(snd_soc_suspend);
721 
722 /* deferred resume work, so resume can complete before we finished
723  * setting our codec back up, which can be very slow on I2C
724  */
725 static void soc_resume_deferred(struct work_struct *work)
726 {
727         struct snd_soc_card *card =
728                         container_of(work, struct snd_soc_card, deferred_resume_work);
729         struct snd_soc_codec *codec;
730         int i, j;
731 
732         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
733          * so userspace apps are blocked from touching us
734          */
735 
736         dev_dbg(card->dev, "ASoC: starting resume work\n");
737 
738         /* Bring us up into D2 so that DAPM starts enabling things */
739         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
740 
741         if (card->resume_pre)
742                 card->resume_pre(card);
743 
744         /* resume AC97 DAIs */
745         for (i = 0; i < card->num_rtd; i++) {
746                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
747 
748                 if (card->rtd[i].dai_link->ignore_suspend)
749                         continue;
750 
751                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
752                         cpu_dai->driver->resume(cpu_dai);
753         }
754 
755         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
756                 /* If the CODEC was idle over suspend then it will have been
757                  * left with bias OFF or STANDBY and suspended so we must now
758                  * resume.  Otherwise the suspend was suppressed.
759                  */
760                 if (codec->driver->resume && codec->suspended) {
761                         switch (codec->dapm.bias_level) {
762                         case SND_SOC_BIAS_STANDBY:
763                         case SND_SOC_BIAS_OFF:
764                                 codec->driver->resume(codec);
765                                 codec->suspended = 0;
766                                 break;
767                         default:
768                                 dev_dbg(codec->dev,
769                                         "ASoC: CODEC was on over suspend\n");
770                                 break;
771                         }
772                 }
773         }
774 
775         for (i = 0; i < card->num_rtd; i++) {
776 
777                 if (card->rtd[i].dai_link->ignore_suspend)
778                         continue;
779 
780                 snd_soc_dapm_stream_event(&card->rtd[i],
781                                           SNDRV_PCM_STREAM_PLAYBACK,
782                                           SND_SOC_DAPM_STREAM_RESUME);
783 
784                 snd_soc_dapm_stream_event(&card->rtd[i],
785                                           SNDRV_PCM_STREAM_CAPTURE,
786                                           SND_SOC_DAPM_STREAM_RESUME);
787         }
788 
789         /* unmute any active DACs */
790         for (i = 0; i < card->num_rtd; i++) {
791 
792                 if (card->rtd[i].dai_link->ignore_suspend)
793                         continue;
794 
795                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
796                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
797                         struct snd_soc_dai_driver *drv = dai->driver;
798 
799                         if (drv->ops->digital_mute && dai->playback_active)
800                                 drv->ops->digital_mute(dai, 0);
801                 }
802         }
803 
804         for (i = 0; i < card->num_rtd; i++) {
805                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
806                 struct snd_soc_platform *platform = card->rtd[i].platform;
807 
808                 if (card->rtd[i].dai_link->ignore_suspend)
809                         continue;
810 
811                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
812                         cpu_dai->driver->resume(cpu_dai);
813                 if (platform->driver->resume && platform->suspended) {
814                         platform->driver->resume(cpu_dai);
815                         platform->suspended = 0;
816                 }
817         }
818 
819         if (card->resume_post)
820                 card->resume_post(card);
821 
822         dev_dbg(card->dev, "ASoC: resume work completed\n");
823 
824         /* userspace can access us now we are back as we were before */
825         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
826 
827         /* Recheck all analogue paths too */
828         dapm_mark_io_dirty(&card->dapm);
829         snd_soc_dapm_sync(&card->dapm);
830 }
831 
832 /* powers up audio subsystem after a suspend */
833 int snd_soc_resume(struct device *dev)
834 {
835         struct snd_soc_card *card = dev_get_drvdata(dev);
836         int i, ac97_control = 0;
837 
838         /* If the initialization of this soc device failed, there is no codec
839          * associated with it. Just bail out in this case.
840          */
841         if (list_empty(&card->codec_dev_list))
842                 return 0;
843 
844         /* activate pins from sleep state */
845         for (i = 0; i < card->num_rtd; i++) {
846                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
847                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
848                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
849                 int j;
850 
851                 if (cpu_dai->active)
852                         pinctrl_pm_select_default_state(cpu_dai->dev);
853 
854                 for (j = 0; j < rtd->num_codecs; j++) {
855                         struct snd_soc_dai *codec_dai = codec_dais[j];
856                         if (codec_dai->active)
857                                 pinctrl_pm_select_default_state(codec_dai->dev);
858                 }
859         }
860 
861         /* AC97 devices might have other drivers hanging off them so
862          * need to resume immediately.  Other drivers don't have that
863          * problem and may take a substantial amount of time to resume
864          * due to I/O costs and anti-pop so handle them out of line.
865          */
866         for (i = 0; i < card->num_rtd; i++) {
867                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
868                 ac97_control |= cpu_dai->driver->ac97_control;
869         }
870         if (ac97_control) {
871                 dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
872                 soc_resume_deferred(&card->deferred_resume_work);
873         } else {
874                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
875                 if (!schedule_work(&card->deferred_resume_work))
876                         dev_err(dev, "ASoC: resume work item may be lost\n");
877         }
878 
879         return 0;
880 }
881 EXPORT_SYMBOL_GPL(snd_soc_resume);
882 #else
883 #define snd_soc_suspend NULL
884 #define snd_soc_resume NULL
885 #endif
886 
887 static const struct snd_soc_dai_ops null_dai_ops = {
888 };
889 
890 static struct snd_soc_codec *soc_find_codec(
891                                         const struct device_node *codec_of_node,
892                                         const char *codec_name)
893 {
894         struct snd_soc_codec *codec;
895 
896         list_for_each_entry(codec, &codec_list, list) {
897                 if (codec_of_node) {
898                         if (codec->dev->of_node != codec_of_node)
899                                 continue;
900                 } else {
901                         if (strcmp(codec->component.name, codec_name))
902                                 continue;
903                 }
904 
905                 return codec;
906         }
907 
908         return NULL;
909 }
910 
911 static struct snd_soc_dai *soc_find_codec_dai(struct snd_soc_codec *codec,
912                                               const char *codec_dai_name)
913 {
914         struct snd_soc_dai *codec_dai;
915 
916         list_for_each_entry(codec_dai, &codec->component.dai_list, list) {
917                 if (!strcmp(codec_dai->name, codec_dai_name)) {
918                         return codec_dai;
919                 }
920         }
921 
922         return NULL;
923 }
924 
925 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
926 {
927         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
928         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
929         struct snd_soc_component *component;
930         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
931         struct snd_soc_dai **codec_dais = rtd->codec_dais;
932         struct snd_soc_platform *platform;
933         struct snd_soc_dai *cpu_dai;
934         const char *platform_name;
935         int i;
936 
937         dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
938 
939         /* Find CPU DAI from registered DAIs*/
940         list_for_each_entry(component, &component_list, list) {
941                 if (dai_link->cpu_of_node &&
942                         component->dev->of_node != dai_link->cpu_of_node)
943                         continue;
944                 if (dai_link->cpu_name &&
945                         strcmp(dev_name(component->dev), dai_link->cpu_name))
946                         continue;
947                 list_for_each_entry(cpu_dai, &component->dai_list, list) {
948                         if (dai_link->cpu_dai_name &&
949                                 strcmp(cpu_dai->name, dai_link->cpu_dai_name))
950                                 continue;
951 
952                         rtd->cpu_dai = cpu_dai;
953                 }
954         }
955 
956         if (!rtd->cpu_dai) {
957                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
958                         dai_link->cpu_dai_name);
959                 return -EPROBE_DEFER;
960         }
961 
962         rtd->num_codecs = dai_link->num_codecs;
963 
964         /* Find CODEC from registered CODECs */
965         for (i = 0; i < rtd->num_codecs; i++) {
966                 struct snd_soc_codec *codec;
967                 codec = soc_find_codec(codecs[i].of_node, codecs[i].name);
968                 if (!codec) {
969                         dev_err(card->dev, "ASoC: CODEC %s not registered\n",
970                                 codecs[i].name);
971                         return -EPROBE_DEFER;
972                 }
973 
974                 codec_dais[i] = soc_find_codec_dai(codec, codecs[i].dai_name);
975                 if (!codec_dais[i]) {
976                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
977                                 codecs[i].dai_name);
978                         return -EPROBE_DEFER;
979                 }
980         }
981 
982         /* Single codec links expect codec and codec_dai in runtime data */
983         rtd->codec_dai = codec_dais[0];
984         rtd->codec = rtd->codec_dai->codec;
985 
986         /* if there's no platform we match on the empty platform */
987         platform_name = dai_link->platform_name;
988         if (!platform_name && !dai_link->platform_of_node)
989                 platform_name = "snd-soc-dummy";
990 
991         /* find one from the set of registered platforms */
992         list_for_each_entry(platform, &platform_list, list) {
993                 if (dai_link->platform_of_node) {
994                         if (platform->dev->of_node !=
995                             dai_link->platform_of_node)
996                                 continue;
997                 } else {
998                         if (strcmp(platform->component.name, platform_name))
999                                 continue;
1000                 }
1001 
1002                 rtd->platform = platform;
1003         }
1004         if (!rtd->platform) {
1005                 dev_err(card->dev, "ASoC: platform %s not registered\n",
1006                         dai_link->platform_name);
1007                 return -EPROBE_DEFER;
1008         }
1009 
1010         card->num_rtd++;
1011 
1012         return 0;
1013 }
1014 
1015 static int soc_remove_platform(struct snd_soc_platform *platform)
1016 {
1017         int ret;
1018 
1019         if (platform->driver->remove) {
1020                 ret = platform->driver->remove(platform);
1021                 if (ret < 0)
1022                         dev_err(platform->dev, "ASoC: failed to remove %d\n",
1023                                 ret);
1024         }
1025 
1026         /* Make sure all DAPM widgets are freed */
1027         snd_soc_dapm_free(&platform->component.dapm);
1028 
1029         soc_cleanup_platform_debugfs(platform);
1030         platform->probed = 0;
1031         module_put(platform->dev->driver->owner);
1032 
1033         return 0;
1034 }
1035 
1036 static void soc_remove_codec(struct snd_soc_codec *codec)
1037 {
1038         int err;
1039 
1040         if (codec->driver->remove) {
1041                 err = codec->driver->remove(codec);
1042                 if (err < 0)
1043                         dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
1044         }
1045 
1046         /* Make sure all DAPM widgets are freed */
1047         snd_soc_dapm_free(&codec->dapm);
1048 
1049         soc_cleanup_codec_debugfs(codec);
1050         codec->probed = 0;
1051         list_del(&codec->card_list);
1052         module_put(codec->dev->driver->owner);
1053 }
1054 
1055 static void soc_remove_codec_dai(struct snd_soc_dai *codec_dai, int order)
1056 {
1057         int err;
1058 
1059         if (codec_dai && codec_dai->probed &&
1060                         codec_dai->driver->remove_order == order) {
1061                 if (codec_dai->driver->remove) {
1062                         err = codec_dai->driver->remove(codec_dai);
1063                         if (err < 0)
1064                                 dev_err(codec_dai->dev,
1065                                         "ASoC: failed to remove %s: %d\n",
1066                                         codec_dai->name, err);
1067                 }
1068                 codec_dai->probed = 0;
1069         }
1070 }
1071 
1072 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1073 {
1074         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1075         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1076         int i, err;
1077 
1078         /* unregister the rtd device */
1079         if (rtd->dev_registered) {
1080                 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
1081                 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1082                 device_unregister(rtd->dev);
1083                 rtd->dev_registered = 0;
1084         }
1085 
1086         /* remove the CODEC DAI */
1087         for (i = 0; i < rtd->num_codecs; i++)
1088                 soc_remove_codec_dai(rtd->codec_dais[i], order);
1089 
1090         /* remove the cpu_dai */
1091         if (cpu_dai && cpu_dai->probed &&
1092                         cpu_dai->driver->remove_order == order) {
1093                 if (cpu_dai->driver->remove) {
1094                         err = cpu_dai->driver->remove(cpu_dai);
1095                         if (err < 0)
1096                                 dev_err(cpu_dai->dev,
1097                                         "ASoC: failed to remove %s: %d\n",
1098                                         cpu_dai->name, err);
1099                 }
1100                 cpu_dai->probed = 0;
1101                 if (!cpu_dai->codec)
1102                         module_put(cpu_dai->dev->driver->owner);
1103         }
1104 }
1105 
1106 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1107                                        int order)
1108 {
1109         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1110         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1111         struct snd_soc_platform *platform = rtd->platform;
1112         struct snd_soc_codec *codec;
1113         int i;
1114 
1115         /* remove the platform */
1116         if (platform && platform->probed &&
1117             platform->driver->remove_order == order) {
1118                 soc_remove_platform(platform);
1119         }
1120 
1121         /* remove the CODEC-side CODEC */
1122         for (i = 0; i < rtd->num_codecs; i++) {
1123                 codec = rtd->codec_dais[i]->codec;
1124                 if (codec && codec->probed &&
1125                     codec->driver->remove_order == order)
1126                         soc_remove_codec(codec);
1127         }
1128 
1129         /* remove any CPU-side CODEC */
1130         if (cpu_dai) {
1131                 codec = cpu_dai->codec;
1132                 if (codec && codec->probed &&
1133                     codec->driver->remove_order == order)
1134                         soc_remove_codec(codec);
1135         }
1136 }
1137 
1138 static void soc_remove_dai_links(struct snd_soc_card *card)
1139 {
1140         int dai, order;
1141 
1142         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1143                         order++) {
1144                 for (dai = 0; dai < card->num_rtd; dai++)
1145                         soc_remove_link_dais(card, dai, order);
1146         }
1147 
1148         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1149                         order++) {
1150                 for (dai = 0; dai < card->num_rtd; dai++)
1151                         soc_remove_link_components(card, dai, order);
1152         }
1153 
1154         card->num_rtd = 0;
1155 }
1156 
1157 static void soc_set_name_prefix(struct snd_soc_card *card,
1158                                 struct snd_soc_component *component)
1159 {
1160         int i;
1161 
1162         if (card->codec_conf == NULL)
1163                 return;
1164 
1165         for (i = 0; i < card->num_configs; i++) {
1166                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1167                 if (map->of_node && component->dev->of_node != map->of_node)
1168                         continue;
1169                 if (map->dev_name && strcmp(component->name, map->dev_name))
1170                         continue;
1171                 component->name_prefix = map->name_prefix;
1172                 break;
1173         }
1174 }
1175 
1176 static int soc_probe_codec(struct snd_soc_card *card,
1177                            struct snd_soc_codec *codec)
1178 {
1179         int ret = 0;
1180         const struct snd_soc_codec_driver *driver = codec->driver;
1181         struct snd_soc_dai *dai;
1182 
1183         codec->component.card = card;
1184         codec->dapm.card = card;
1185         soc_set_name_prefix(card, &codec->component);
1186 
1187         if (!try_module_get(codec->dev->driver->owner))
1188                 return -ENODEV;
1189 
1190         soc_init_codec_debugfs(codec);
1191 
1192         if (driver->dapm_widgets) {
1193                 ret = snd_soc_dapm_new_controls(&codec->dapm,
1194                                                 driver->dapm_widgets,
1195                                                 driver->num_dapm_widgets);
1196 
1197                 if (ret != 0) {
1198                         dev_err(codec->dev,
1199                                 "Failed to create new controls %d\n", ret);
1200                         goto err_probe;
1201                 }
1202         }
1203 
1204         /* Create DAPM widgets for each DAI stream */
1205         list_for_each_entry(dai, &codec->component.dai_list, list) {
1206                 ret = snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1207 
1208                 if (ret != 0) {
1209                         dev_err(codec->dev,
1210                                 "Failed to create DAI widgets %d\n", ret);
1211                         goto err_probe;
1212                 }
1213         }
1214 
1215         codec->dapm.idle_bias_off = driver->idle_bias_off;
1216 
1217         if (driver->probe) {
1218                 ret = driver->probe(codec);
1219                 if (ret < 0) {
1220                         dev_err(codec->dev,
1221                                 "ASoC: failed to probe CODEC %d\n", ret);
1222                         goto err_probe;
1223                 }
1224                 WARN(codec->dapm.idle_bias_off &&
1225                         codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1226                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1227                         codec->component.name);
1228         }
1229 
1230         if (driver->controls)
1231                 snd_soc_add_codec_controls(codec, driver->controls,
1232                                      driver->num_controls);
1233         if (driver->dapm_routes)
1234                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1235                                         driver->num_dapm_routes);
1236 
1237         /* mark codec as probed and add to card codec list */
1238         codec->probed = 1;
1239         list_add(&codec->card_list, &card->codec_dev_list);
1240         list_add(&codec->dapm.list, &card->dapm_list);
1241 
1242         return 0;
1243 
1244 err_probe:
1245         soc_cleanup_codec_debugfs(codec);
1246         module_put(codec->dev->driver->owner);
1247 
1248         return ret;
1249 }
1250 
1251 static int soc_probe_platform(struct snd_soc_card *card,
1252                            struct snd_soc_platform *platform)
1253 {
1254         int ret = 0;
1255         const struct snd_soc_platform_driver *driver = platform->driver;
1256         struct snd_soc_component *component;
1257         struct snd_soc_dai *dai;
1258 
1259         platform->component.card = card;
1260         platform->component.dapm.card = card;
1261 
1262         if (!try_module_get(platform->dev->driver->owner))
1263                 return -ENODEV;
1264 
1265         soc_init_platform_debugfs(platform);
1266 
1267         if (driver->dapm_widgets)
1268                 snd_soc_dapm_new_controls(&platform->component.dapm,
1269                         driver->dapm_widgets, driver->num_dapm_widgets);
1270 
1271         /* Create DAPM widgets for each DAI stream */
1272         list_for_each_entry(component, &component_list, list) {
1273                 if (component->dev != platform->dev)
1274                         continue;
1275                 list_for_each_entry(dai, &component->dai_list, list)
1276                         snd_soc_dapm_new_dai_widgets(&platform->component.dapm,
1277                                 dai);
1278         }
1279 
1280         platform->component.dapm.idle_bias_off = 1;
1281 
1282         if (driver->probe) {
1283                 ret = driver->probe(platform);
1284                 if (ret < 0) {
1285                         dev_err(platform->dev,
1286                                 "ASoC: failed to probe platform %d\n", ret);
1287                         goto err_probe;
1288                 }
1289         }
1290 
1291         if (driver->controls)
1292                 snd_soc_add_platform_controls(platform, driver->controls,
1293                                      driver->num_controls);
1294         if (driver->dapm_routes)
1295                 snd_soc_dapm_add_routes(&platform->component.dapm,
1296                         driver->dapm_routes, driver->num_dapm_routes);
1297 
1298         /* mark platform as probed and add to card platform list */
1299         platform->probed = 1;
1300         list_add(&platform->component.dapm.list, &card->dapm_list);
1301 
1302         return 0;
1303 
1304 err_probe:
1305         soc_cleanup_platform_debugfs(platform);
1306         module_put(platform->dev->driver->owner);
1307 
1308         return ret;
1309 }
1310 
1311 static void rtd_release(struct device *dev)
1312 {
1313         kfree(dev);
1314 }
1315 
1316 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1317         const char *name)
1318 {
1319         int ret = 0;
1320 
1321         /* register the rtd device */
1322         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1323         if (!rtd->dev)
1324                 return -ENOMEM;
1325         device_initialize(rtd->dev);
1326         rtd->dev->parent = rtd->card->dev;
1327         rtd->dev->release = rtd_release;
1328         dev_set_name(rtd->dev, "%s", name);
1329         dev_set_drvdata(rtd->dev, rtd);
1330         mutex_init(&rtd->pcm_mutex);
1331         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1332         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1333         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1334         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1335         ret = device_add(rtd->dev);
1336         if (ret < 0) {
1337                 /* calling put_device() here to free the rtd->dev */
1338                 put_device(rtd->dev);
1339                 dev_err(rtd->card->dev,
1340                         "ASoC: failed to register runtime device: %d\n", ret);
1341                 return ret;
1342         }
1343         rtd->dev_registered = 1;
1344 
1345         /* add DAPM sysfs entries for this codec */
1346         ret = snd_soc_dapm_sys_add(rtd->dev);
1347         if (ret < 0)
1348                 dev_err(rtd->dev,
1349                         "ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1350 
1351         /* add codec sysfs entries */
1352         ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1353         if (ret < 0)
1354                 dev_err(rtd->dev,
1355                         "ASoC: failed to add codec sysfs files: %d\n", ret);
1356 
1357         return 0;
1358 }
1359 
1360 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1361                                      int order)
1362 {
1363         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1364         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1365         struct snd_soc_platform *platform = rtd->platform;
1366         int i, ret;
1367 
1368         /* probe the CPU-side component, if it is a CODEC */
1369         if (cpu_dai->codec &&
1370             !cpu_dai->codec->probed &&
1371             cpu_dai->codec->driver->probe_order == order) {
1372                 ret = soc_probe_codec(card, cpu_dai->codec);
1373                 if (ret < 0)
1374                         return ret;
1375         }
1376 
1377         /* probe the CODEC-side components */
1378         for (i = 0; i < rtd->num_codecs; i++) {
1379                 if (!rtd->codec_dais[i]->codec->probed &&
1380                     rtd->codec_dais[i]->codec->driver->probe_order == order) {
1381                         ret = soc_probe_codec(card, rtd->codec_dais[i]->codec);
1382                         if (ret < 0)
1383                                 return ret;
1384                 }
1385         }
1386 
1387         /* probe the platform */
1388         if (!platform->probed &&
1389             platform->driver->probe_order == order) {
1390                 ret = soc_probe_platform(card, platform);
1391                 if (ret < 0)
1392                         return ret;
1393         }
1394 
1395         return 0;
1396 }
1397 
1398 static int soc_probe_codec_dai(struct snd_soc_card *card,
1399                                struct snd_soc_dai *codec_dai,
1400                                int order)
1401 {
1402         int ret;
1403 
1404         if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1405                 if (codec_dai->driver->probe) {
1406                         ret = codec_dai->driver->probe(codec_dai);
1407                         if (ret < 0) {
1408                                 dev_err(codec_dai->dev,
1409                                         "ASoC: failed to probe CODEC DAI %s: %d\n",
1410                                         codec_dai->name, ret);
1411                                 return ret;
1412                         }
1413                 }
1414 
1415                 /* mark codec_dai as probed and add to card dai list */
1416                 codec_dai->probed = 1;
1417         }
1418 
1419         return 0;
1420 }
1421 
1422 static int soc_link_dai_widgets(struct snd_soc_card *card,
1423                                 struct snd_soc_dai_link *dai_link,
1424                                 struct snd_soc_pcm_runtime *rtd)
1425 {
1426         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1427         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1428         struct snd_soc_dapm_widget *play_w, *capture_w;
1429         int ret;
1430 
1431         if (rtd->num_codecs > 1)
1432                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1433 
1434         /* link the DAI widgets */
1435         play_w = codec_dai->playback_widget;
1436         capture_w = cpu_dai->capture_widget;
1437         if (play_w && capture_w) {
1438                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1439                                            capture_w, play_w);
1440                 if (ret != 0) {
1441                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1442                                 play_w->name, capture_w->name, ret);
1443                         return ret;
1444                 }
1445         }
1446 
1447         play_w = cpu_dai->playback_widget;
1448         capture_w = codec_dai->capture_widget;
1449         if (play_w && capture_w) {
1450                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1451                                            capture_w, play_w);
1452                 if (ret != 0) {
1453                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1454                                 play_w->name, capture_w->name, ret);
1455                         return ret;
1456                 }
1457         }
1458 
1459         return 0;
1460 }
1461 
1462 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1463 {
1464         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1465         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1466         struct snd_soc_platform *platform = rtd->platform;
1467         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1468         int i, ret;
1469 
1470         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1471                         card->name, num, order);
1472 
1473         /* config components */
1474         cpu_dai->platform = platform;
1475         cpu_dai->card = card;
1476         for (i = 0; i < rtd->num_codecs; i++)
1477                 rtd->codec_dais[i]->card = card;
1478 
1479         /* set default power off timeout */
1480         rtd->pmdown_time = pmdown_time;
1481 
1482         /* probe the cpu_dai */
1483         if (!cpu_dai->probed &&
1484                         cpu_dai->driver->probe_order == order) {
1485                 if (!cpu_dai->codec) {
1486                         if (!try_module_get(cpu_dai->dev->driver->owner))
1487                                 return -ENODEV;
1488                 }
1489 
1490                 if (cpu_dai->driver->probe) {
1491                         ret = cpu_dai->driver->probe(cpu_dai);
1492                         if (ret < 0) {
1493                                 dev_err(cpu_dai->dev,
1494                                         "ASoC: failed to probe CPU DAI %s: %d\n",
1495                                         cpu_dai->name, ret);
1496                                 module_put(cpu_dai->dev->driver->owner);
1497                                 return ret;
1498                         }
1499                 }
1500                 cpu_dai->probed = 1;
1501         }
1502 
1503         /* probe the CODEC DAI */
1504         for (i = 0; i < rtd->num_codecs; i++) {
1505                 ret = soc_probe_codec_dai(card, rtd->codec_dais[i], order);
1506                 if (ret)
1507                         return ret;
1508         }
1509 
1510         /* complete DAI probe during last probe */
1511         if (order != SND_SOC_COMP_ORDER_LAST)
1512                 return 0;
1513 
1514         /* do machine specific initialization */
1515         if (dai_link->init) {
1516                 ret = dai_link->init(rtd);
1517                 if (ret < 0) {
1518                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1519                                 dai_link->name, ret);
1520                         return ret;
1521                 }
1522         }
1523 
1524         ret = soc_post_component_init(rtd, dai_link->name);
1525         if (ret)
1526                 return ret;
1527 
1528 #ifdef CONFIG_DEBUG_FS
1529         /* add DPCM sysfs entries */
1530         if (dai_link->dynamic) {
1531                 ret = soc_dpcm_debugfs_add(rtd);
1532                 if (ret < 0) {
1533                         dev_err(rtd->dev,
1534                                 "ASoC: failed to add dpcm sysfs entries: %d\n",
1535                                 ret);
1536                         return ret;
1537                 }
1538         }
1539 #endif
1540 
1541         ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1542         if (ret < 0)
1543                 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1544                         ret);
1545 
1546         if (cpu_dai->driver->compress_dai) {
1547                 /*create compress_device"*/
1548                 ret = soc_new_compress(rtd, num);
1549                 if (ret < 0) {
1550                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1551                                          dai_link->stream_name);
1552                         return ret;
1553                 }
1554         } else {
1555 
1556                 if (!dai_link->params) {
1557                         /* create the pcm */
1558                         ret = soc_new_pcm(rtd, num);
1559                         if (ret < 0) {
1560                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1561                                        dai_link->stream_name, ret);
1562                                 return ret;
1563                         }
1564                 } else {
1565                         INIT_DELAYED_WORK(&rtd->delayed_work,
1566                                                 codec2codec_close_delayed_work);
1567 
1568                         /* link the DAI widgets */
1569                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1570                         if (ret)
1571                                 return ret;
1572                 }
1573         }
1574 
1575         /* add platform data for AC97 devices */
1576         for (i = 0; i < rtd->num_codecs; i++) {
1577                 if (rtd->codec_dais[i]->driver->ac97_control)
1578                         snd_ac97_dev_add_pdata(rtd->codec_dais[i]->codec->ac97,
1579                                                rtd->cpu_dai->ac97_pdata);
1580         }
1581 
1582         return 0;
1583 }
1584 
1585 #ifdef CONFIG_SND_SOC_AC97_BUS
1586 static int soc_register_ac97_codec(struct snd_soc_codec *codec,
1587                                    struct snd_soc_dai *codec_dai)
1588 {
1589         int ret;
1590 
1591         /* Only instantiate AC97 if not already done by the adaptor
1592          * for the generic AC97 subsystem.
1593          */
1594         if (codec_dai->driver->ac97_control && !codec->ac97_registered) {
1595                 /*
1596                  * It is possible that the AC97 device is already registered to
1597                  * the device subsystem. This happens when the device is created
1598                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1599                  * is the generic AC97 glue but others migh emerge.
1600                  *
1601                  * In those cases we don't try to register the device again.
1602                  */
1603                 if (!codec->ac97_created)
1604                         return 0;
1605 
1606                 ret = soc_ac97_dev_register(codec);
1607                 if (ret < 0) {
1608                         dev_err(codec->dev,
1609                                 "ASoC: AC97 device register failed: %d\n", ret);
1610                         return ret;
1611                 }
1612 
1613                 codec->ac97_registered = 1;
1614         }
1615         return 0;
1616 }
1617 
1618 static void soc_unregister_ac97_codec(struct snd_soc_codec *codec)
1619 {
1620         if (codec->ac97_registered) {
1621                 soc_ac97_dev_unregister(codec);
1622                 codec->ac97_registered = 0;
1623         }
1624 }
1625 
1626 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1627 {
1628         int i, ret;
1629 
1630         for (i = 0; i < rtd->num_codecs; i++) {
1631                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
1632 
1633                 ret = soc_register_ac97_codec(codec_dai->codec, codec_dai);
1634                 if (ret) {
1635                         while (--i >= 0)
1636                                 soc_unregister_ac97_codec(codec_dai->codec);
1637                         return ret;
1638                 }
1639         }
1640 
1641         return 0;
1642 }
1643 
1644 static void soc_unregister_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1645 {
1646         int i;
1647 
1648         for (i = 0; i < rtd->num_codecs; i++)
1649                 soc_unregister_ac97_codec(rtd->codec_dais[i]->codec);
1650 }
1651 #endif
1652 
1653 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1654 {
1655         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1656         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1657         const char *codecname = aux_dev->codec_name;
1658 
1659         rtd->codec = soc_find_codec(aux_dev->codec_of_node, codecname);
1660         if (!rtd->codec) {
1661                 if (aux_dev->codec_of_node)
1662                         codecname = of_node_full_name(aux_dev->codec_of_node);
1663 
1664                 dev_err(card->dev, "ASoC: %s not registered\n", codecname);
1665                 return -EPROBE_DEFER;
1666         }
1667 
1668         return 0;
1669 }
1670 
1671 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1672 {
1673         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1674         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1675         int ret;
1676 
1677         if (rtd->codec->probed) {
1678                 dev_err(rtd->codec->dev, "ASoC: codec already probed\n");
1679                 return -EBUSY;
1680         }
1681 
1682         ret = soc_probe_codec(card, rtd->codec);
1683         if (ret < 0)
1684                 return ret;
1685 
1686         /* do machine specific initialization */
1687         if (aux_dev->init) {
1688                 ret = aux_dev->init(&rtd->codec->dapm);
1689                 if (ret < 0) {
1690                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1691                                 aux_dev->name, ret);
1692                         return ret;
1693                 }
1694         }
1695 
1696         return soc_post_component_init(rtd, aux_dev->name);
1697 }
1698 
1699 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1700 {
1701         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1702         struct snd_soc_codec *codec = rtd->codec;
1703 
1704         /* unregister the rtd device */
1705         if (rtd->dev_registered) {
1706                 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1707                 device_unregister(rtd->dev);
1708                 rtd->dev_registered = 0;
1709         }
1710 
1711         if (codec && codec->probed)
1712                 soc_remove_codec(codec);
1713 }
1714 
1715 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1716 {
1717         int ret;
1718 
1719         if (codec->cache_init)
1720                 return 0;
1721 
1722         ret = snd_soc_cache_init(codec);
1723         if (ret < 0) {
1724                 dev_err(codec->dev,
1725                         "ASoC: Failed to set cache compression type: %d\n",
1726                         ret);
1727                 return ret;
1728         }
1729         codec->cache_init = 1;
1730         return 0;
1731 }
1732 
1733 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1734 {
1735         struct snd_soc_codec *codec;
1736         struct snd_soc_dai_link *dai_link;
1737         int ret, i, order, dai_fmt;
1738 
1739         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1740 
1741         /* bind DAIs */
1742         for (i = 0; i < card->num_links; i++) {
1743                 ret = soc_bind_dai_link(card, i);
1744                 if (ret != 0)
1745                         goto base_error;
1746         }
1747 
1748         /* bind aux_devs too */
1749         for (i = 0; i < card->num_aux_devs; i++) {
1750                 ret = soc_bind_aux_dev(card, i);
1751                 if (ret != 0)
1752                         goto base_error;
1753         }
1754 
1755         /* initialize the register cache for each available codec */
1756         list_for_each_entry(codec, &codec_list, list) {
1757                 if (codec->cache_init)
1758                         continue;
1759                 ret = snd_soc_init_codec_cache(codec);
1760                 if (ret < 0)
1761                         goto base_error;
1762         }
1763 
1764         /* card bind complete so register a sound card */
1765         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1766                         card->owner, 0, &card->snd_card);
1767         if (ret < 0) {
1768                 dev_err(card->dev,
1769                         "ASoC: can't create sound card for card %s: %d\n",
1770                         card->name, ret);
1771                 goto base_error;
1772         }
1773 
1774         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1775         card->dapm.dev = card->dev;
1776         card->dapm.card = card;
1777         list_add(&card->dapm.list, &card->dapm_list);
1778 
1779 #ifdef CONFIG_DEBUG_FS
1780         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1781 #endif
1782 
1783 #ifdef CONFIG_PM_SLEEP
1784         /* deferred resume work */
1785         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1786 #endif
1787 
1788         if (card->dapm_widgets)
1789                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1790                                           card->num_dapm_widgets);
1791 
1792         /* initialise the sound card only once */
1793         if (card->probe) {
1794                 ret = card->probe(card);
1795                 if (ret < 0)
1796                         goto card_probe_error;
1797         }
1798 
1799         /* probe all components used by DAI links on this card */
1800         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1801                         order++) {
1802                 for (i = 0; i < card->num_links; i++) {
1803                         ret = soc_probe_link_components(card, i, order);
1804                         if (ret < 0) {
1805                                 dev_err(card->dev,
1806                                         "ASoC: failed to instantiate card %d\n",
1807                                         ret);
1808                                 goto probe_dai_err;
1809                         }
1810                 }
1811         }
1812 
1813         /* probe all DAI links on this card */
1814         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1815                         order++) {
1816                 for (i = 0; i < card->num_links; i++) {
1817                         ret = soc_probe_link_dais(card, i, order);
1818                         if (ret < 0) {
1819                                 dev_err(card->dev,
1820                                         "ASoC: failed to instantiate card %d\n",
1821                                         ret);
1822                                 goto probe_dai_err;
1823                         }
1824                 }
1825         }
1826 
1827         for (i = 0; i < card->num_aux_devs; i++) {
1828                 ret = soc_probe_aux_dev(card, i);
1829                 if (ret < 0) {
1830                         dev_err(card->dev,
1831                                 "ASoC: failed to add auxiliary devices %d\n",
1832                                 ret);
1833                         goto probe_aux_dev_err;
1834                 }
1835         }
1836 
1837         snd_soc_dapm_link_dai_widgets(card);
1838         snd_soc_dapm_connect_dai_link_widgets(card);
1839 
1840         if (card->controls)
1841                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1842 
1843         if (card->dapm_routes)
1844                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1845                                         card->num_dapm_routes);
1846 
1847         for (i = 0; i < card->num_links; i++) {
1848                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1849                 dai_link = &card->dai_link[i];
1850                 dai_fmt = dai_link->dai_fmt;
1851 
1852                 if (dai_fmt) {
1853                         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1854                         int j;
1855 
1856                         for (j = 0; j < rtd->num_codecs; j++) {
1857                                 struct snd_soc_dai *codec_dai = codec_dais[j];
1858 
1859                                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1860                                 if (ret != 0 && ret != -ENOTSUPP)
1861                                         dev_warn(codec_dai->dev,
1862                                                  "ASoC: Failed to set DAI format: %d\n",
1863                                                  ret);
1864                         }
1865                 }
1866 
1867                 /* If this is a regular CPU link there will be a platform */
1868                 if (dai_fmt &&
1869                     (dai_link->platform_name || dai_link->platform_of_node)) {
1870                         ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1871                                                   dai_fmt);
1872                         if (ret != 0 && ret != -ENOTSUPP)
1873                                 dev_warn(card->rtd[i].cpu_dai->dev,
1874                                          "ASoC: Failed to set DAI format: %d\n",
1875                                          ret);
1876                 } else if (dai_fmt) {
1877                         /* Flip the polarity for the "CPU" end */
1878                         dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1879                         switch (dai_link->dai_fmt &
1880                                 SND_SOC_DAIFMT_MASTER_MASK) {
1881                         case SND_SOC_DAIFMT_CBM_CFM:
1882                                 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1883                                 break;
1884                         case SND_SOC_DAIFMT_CBM_CFS:
1885                                 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1886                                 break;
1887                         case SND_SOC_DAIFMT_CBS_CFM:
1888                                 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1889                                 break;
1890                         case SND_SOC_DAIFMT_CBS_CFS:
1891                                 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1892                                 break;
1893                         }
1894 
1895                         ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1896                                                   dai_fmt);
1897                         if (ret != 0 && ret != -ENOTSUPP)
1898                                 dev_warn(card->rtd[i].cpu_dai->dev,
1899                                          "ASoC: Failed to set DAI format: %d\n",
1900                                          ret);
1901                 }
1902         }
1903 
1904         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1905                  "%s", card->name);
1906         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1907                  "%s", card->long_name ? card->long_name : card->name);
1908         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1909                  "%s", card->driver_name ? card->driver_name : card->name);
1910         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1911                 switch (card->snd_card->driver[i]) {
1912                 case '_':
1913                 case '-':
1914                 case '\0':
1915                         break;
1916                 default:
1917                         if (!isalnum(card->snd_card->driver[i]))
1918                                 card->snd_card->driver[i] = '_';
1919                         break;
1920                 }
1921         }
1922 
1923         if (card->late_probe) {
1924                 ret = card->late_probe(card);
1925                 if (ret < 0) {
1926                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1927                                 card->name, ret);
1928                         goto probe_aux_dev_err;
1929                 }
1930         }
1931 
1932         if (card->fully_routed)
1933                 snd_soc_dapm_auto_nc_pins(card);
1934 
1935         snd_soc_dapm_new_widgets(card);
1936 
1937         ret = snd_card_register(card->snd_card);
1938         if (ret < 0) {
1939                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1940                                 ret);
1941                 goto probe_aux_dev_err;
1942         }
1943 
1944 #ifdef CONFIG_SND_SOC_AC97_BUS
1945         /* register any AC97 codecs */
1946         for (i = 0; i < card->num_rtd; i++) {
1947                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1948                 if (ret < 0) {
1949                         dev_err(card->dev,
1950                                 "ASoC: failed to register AC97: %d\n", ret);
1951                         while (--i >= 0)
1952                                 soc_unregister_ac97_dai_link(&card->rtd[i]);
1953                         goto probe_aux_dev_err;
1954                 }
1955         }
1956 #endif
1957 
1958         card->instantiated = 1;
1959         snd_soc_dapm_sync(&card->dapm);
1960         mutex_unlock(&card->mutex);
1961 
1962         return 0;
1963 
1964 probe_aux_dev_err:
1965         for (i = 0; i < card->num_aux_devs; i++)
1966                 soc_remove_aux_dev(card, i);
1967 
1968 probe_dai_err:
1969         soc_remove_dai_links(card);
1970 
1971 card_probe_error:
1972         if (card->remove)
1973                 card->remove(card);
1974 
1975         snd_card_free(card->snd_card);
1976 
1977 base_error:
1978         mutex_unlock(&card->mutex);
1979 
1980         return ret;
1981 }
1982 
1983 /* probes a new socdev */
1984 static int soc_probe(struct platform_device *pdev)
1985 {
1986         struct snd_soc_card *card = platform_get_drvdata(pdev);
1987 
1988         /*
1989          * no card, so machine driver should be registering card
1990          * we should not be here in that case so ret error
1991          */
1992         if (!card)
1993                 return -EINVAL;
1994 
1995         dev_warn(&pdev->dev,
1996                  "ASoC: machine %s should use snd_soc_register_card()\n",
1997                  card->name);
1998 
1999         /* Bodge while we unpick instantiation */
2000         card->dev = &pdev->dev;
2001 
2002         return snd_soc_register_card(card);
2003 }
2004 
2005 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2006 {
2007         int i;
2008 
2009         /* make sure any delayed work runs */
2010         for (i = 0; i < card->num_rtd; i++) {
2011                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2012                 flush_delayed_work(&rtd->delayed_work);
2013         }
2014 
2015         /* remove auxiliary devices */
2016         for (i = 0; i < card->num_aux_devs; i++)
2017                 soc_remove_aux_dev(card, i);
2018 
2019         /* remove and free each DAI */
2020         soc_remove_dai_links(card);
2021 
2022         soc_cleanup_card_debugfs(card);
2023 
2024         /* remove the card */
2025         if (card->remove)
2026                 card->remove(card);
2027 
2028         snd_soc_dapm_free(&card->dapm);
2029 
2030         snd_card_free(card->snd_card);
2031         return 0;
2032 
2033 }
2034 
2035 /* removes a socdev */
2036 static int soc_remove(struct platform_device *pdev)
2037 {
2038         struct snd_soc_card *card = platform_get_drvdata(pdev);
2039 
2040         snd_soc_unregister_card(card);
2041         return 0;
2042 }
2043 
2044 int snd_soc_poweroff(struct device *dev)
2045 {
2046         struct snd_soc_card *card = dev_get_drvdata(dev);
2047         int i;
2048 
2049         if (!card->instantiated)
2050                 return 0;
2051 
2052         /* Flush out pmdown_time work - we actually do want to run it
2053          * now, we're shutting down so no imminent restart. */
2054         for (i = 0; i < card->num_rtd; i++) {
2055                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2056                 flush_delayed_work(&rtd->delayed_work);
2057         }
2058 
2059         snd_soc_dapm_shutdown(card);
2060 
2061         /* deactivate pins to sleep state */
2062         for (i = 0; i < card->num_rtd; i++) {
2063                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2064                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2065                 int j;
2066 
2067                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2068                 for (j = 0; j < rtd->num_codecs; j++) {
2069                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2070                         pinctrl_pm_select_sleep_state(codec_dai->dev);
2071                 }
2072         }
2073 
2074         return 0;
2075 }
2076 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2077 
2078 const struct dev_pm_ops snd_soc_pm_ops = {
2079         .suspend = snd_soc_suspend,
2080         .resume = snd_soc_resume,
2081         .freeze = snd_soc_suspend,
2082         .thaw = snd_soc_resume,
2083         .poweroff = snd_soc_poweroff,
2084         .restore = snd_soc_resume,
2085 };
2086 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2087 
2088 /* ASoC platform driver */
2089 static struct platform_driver soc_driver = {
2090         .driver         = {
2091                 .name           = "soc-audio",
2092                 .owner          = THIS_MODULE,
2093                 .pm             = &snd_soc_pm_ops,
2094         },
2095         .probe          = soc_probe,
2096         .remove         = soc_remove,
2097 };
2098 
2099 /**
2100  * snd_soc_new_ac97_codec - initailise AC97 device
2101  * @codec: audio codec
2102  * @ops: AC97 bus operations
2103  * @num: AC97 codec number
2104  *
2105  * Initialises AC97 codec resources for use by ad-hoc devices only.
2106  */
2107 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2108         struct snd_ac97_bus_ops *ops, int num)
2109 {
2110         mutex_lock(&codec->mutex);
2111 
2112         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2113         if (codec->ac97 == NULL) {
2114                 mutex_unlock(&codec->mutex);
2115                 return -ENOMEM;
2116         }
2117 
2118         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2119         if (codec->ac97->bus == NULL) {
2120                 kfree(codec->ac97);
2121                 codec->ac97 = NULL;
2122                 mutex_unlock(&codec->mutex);
2123                 return -ENOMEM;
2124         }
2125 
2126         codec->ac97->bus->ops = ops;
2127         codec->ac97->num = num;
2128 
2129         /*
2130          * Mark the AC97 device to be created by us. This way we ensure that the
2131          * device will be registered with the device subsystem later on.
2132          */
2133         codec->ac97_created = 1;
2134 
2135         mutex_unlock(&codec->mutex);
2136         return 0;
2137 }
2138 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2139 
2140 static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;
2141 
2142 static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
2143 {
2144         struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2145 
2146         pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);
2147 
2148         gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);
2149 
2150         udelay(10);
2151 
2152         gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2153 
2154         pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2155         msleep(2);
2156 }
2157 
2158 static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
2159 {
2160         struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
2161 
2162         pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);
2163 
2164         gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
2165         gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
2166         gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);
2167 
2168         udelay(10);
2169 
2170         gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);
2171 
2172         pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
2173         msleep(2);
2174 }
2175 
2176 static int snd_soc_ac97_parse_pinctl(struct device *dev,
2177                 struct snd_ac97_reset_cfg *cfg)
2178 {
2179         struct pinctrl *p;
2180         struct pinctrl_state *state;
2181         int gpio;
2182         int ret;
2183 
2184         p = devm_pinctrl_get(dev);
2185         if (IS_ERR(p)) {
2186                 dev_err(dev, "Failed to get pinctrl\n");
2187                 return PTR_ERR(p);
2188         }
2189         cfg->pctl = p;
2190 
2191         state = pinctrl_lookup_state(p, "ac97-reset");
2192         if (IS_ERR(state)) {
2193                 dev_err(dev, "Can't find pinctrl state ac97-reset\n");
2194                 return PTR_ERR(state);
2195         }
2196         cfg->pstate_reset = state;
2197 
2198         state = pinctrl_lookup_state(p, "ac97-warm-reset");
2199         if (IS_ERR(state)) {
2200                 dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
2201                 return PTR_ERR(state);
2202         }
2203         cfg->pstate_warm_reset = state;
2204 
2205         state = pinctrl_lookup_state(p, "ac97-running");
2206         if (IS_ERR(state)) {
2207                 dev_err(dev, "Can't find pinctrl state ac97-running\n");
2208                 return PTR_ERR(state);
2209         }
2210         cfg->pstate_run = state;
2211 
2212         gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
2213         if (gpio < 0) {
2214                 dev_err(dev, "Can't find ac97-sync gpio\n");
2215                 return gpio;
2216         }
2217         ret = devm_gpio_request(dev, gpio, "AC97 link sync");
2218         if (ret) {
2219                 dev_err(dev, "Failed requesting ac97-sync gpio\n");
2220                 return ret;
2221         }
2222         cfg->gpio_sync = gpio;
2223 
2224         gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
2225         if (gpio < 0) {
2226                 dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
2227                 return gpio;
2228         }
2229         ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
2230         if (ret) {
2231                 dev_err(dev, "Failed requesting ac97-sdata gpio\n");
2232                 return ret;
2233         }
2234         cfg->gpio_sdata = gpio;
2235 
2236         gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
2237         if (gpio < 0) {
2238                 dev_err(dev, "Can't find ac97-reset gpio\n");
2239                 return gpio;
2240         }
2241         ret = devm_gpio_request(dev, gpio, "AC97 link reset");
2242         if (ret) {
2243                 dev_err(dev, "Failed requesting ac97-reset gpio\n");
2244                 return ret;
2245         }
2246         cfg->gpio_reset = gpio;
2247 
2248         return 0;
2249 }
2250 
2251 struct snd_ac97_bus_ops *soc_ac97_ops;
2252 EXPORT_SYMBOL_GPL(soc_ac97_ops);
2253 
2254 int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
2255 {
2256         if (ops == soc_ac97_ops)
2257                 return 0;
2258 
2259         if (soc_ac97_ops && ops)
2260                 return -EBUSY;
2261 
2262         soc_ac97_ops = ops;
2263 
2264         return 0;
2265 }
2266 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);
2267 
2268 /**
2269  * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions
2270  *
2271  * This function sets the reset and warm_reset properties of ops and parses
2272  * the device node of pdev to get pinctrl states and gpio numbers to use.
2273  */
2274 int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,
2275                 struct platform_device *pdev)
2276 {
2277         struct device *dev = &pdev->dev;
2278         struct snd_ac97_reset_cfg cfg;
2279         int ret;
2280 
2281         ret = snd_soc_ac97_parse_pinctl(dev, &cfg);
2282         if (ret)
2283                 return ret;
2284 
2285         ret = snd_soc_set_ac97_ops(ops);
2286         if (ret)
2287                 return ret;
2288 
2289         ops->warm_reset = snd_soc_ac97_warm_reset;
2290         ops->reset = snd_soc_ac97_reset;
2291 
2292         snd_ac97_rst_cfg = cfg;
2293         return 0;
2294 }
2295 EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);
2296 
2297 /**
2298  * snd_soc_free_ac97_codec - free AC97 codec device
2299  * @codec: audio codec
2300  *
2301  * Frees AC97 codec device resources.
2302  */
2303 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2304 {
2305         mutex_lock(&codec->mutex);
2306 #ifdef CONFIG_SND_SOC_AC97_BUS
2307         soc_unregister_ac97_codec(codec);
2308 #endif
2309         kfree(codec->ac97->bus);
2310         kfree(codec->ac97);
2311         codec->ac97 = NULL;
2312         codec->ac97_created = 0;
2313         mutex_unlock(&codec->mutex);
2314 }
2315 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2316 
2317 /**
2318  * snd_soc_cnew - create new control
2319  * @_template: control template
2320  * @data: control private data
2321  * @long_name: control long name
2322  * @prefix: control name prefix
2323  *
2324  * Create a new mixer control from a template control.
2325  *
2326  * Returns 0 for success, else error.
2327  */
2328 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2329                                   void *data, const char *long_name,
2330                                   const char *prefix)
2331 {
2332         struct snd_kcontrol_new template;
2333         struct snd_kcontrol *kcontrol;
2334         char *name = NULL;
2335 
2336         memcpy(&template, _template, sizeof(template));
2337         template.index = 0;
2338 
2339         if (!long_name)
2340                 long_name = template.name;
2341 
2342         if (prefix) {
2343                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2344                 if (!name)
2345                         return NULL;
2346 
2347                 template.name = name;
2348         } else {
2349                 template.name = long_name;
2350         }
2351 
2352         kcontrol = snd_ctl_new1(&template, data);
2353 
2354         kfree(name);
2355 
2356         return kcontrol;
2357 }
2358 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2359 
2360 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2361         const struct snd_kcontrol_new *controls, int num_controls,
2362         const char *prefix, void *data)
2363 {
2364         int err, i;
2365 
2366         for (i = 0; i < num_controls; i++) {
2367                 const struct snd_kcontrol_new *control = &controls[i];
2368                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2369                                                      control->name, prefix));
2370                 if (err < 0) {
2371                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
2372                                 control->name, err);
2373                         return err;
2374                 }
2375         }
2376 
2377         return 0;
2378 }
2379 
2380 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2381                                                const char *name)
2382 {
2383         struct snd_card *card = soc_card->snd_card;
2384         struct snd_kcontrol *kctl;
2385 
2386         if (unlikely(!name))
2387                 return NULL;
2388 
2389         list_for_each_entry(kctl, &card->controls, list)
2390                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2391                         return kctl;
2392         return NULL;
2393 }
2394 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2395 
2396 /**
2397  * snd_soc_add_component_controls - Add an array of controls to a component.
2398  *
2399  * @component: Component to add controls to
2400  * @controls: Array of controls to add
2401  * @num_controls: Number of elements in the array
2402  *
2403  * Return: 0 for success, else error.
2404  */
2405 int snd_soc_add_component_controls(struct snd_soc_component *component,
2406         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2407 {
2408         struct snd_card *card = component->card->snd_card;
2409 
2410         return snd_soc_add_controls(card, component->dev, controls,
2411                         num_controls, component->name_prefix, component);
2412 }
2413 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2414 
2415 /**
2416  * snd_soc_add_codec_controls - add an array of controls to a codec.
2417  * Convenience function to add a list of controls. Many codecs were
2418  * duplicating this code.
2419  *
2420  * @codec: codec to add controls to
2421  * @controls: array of controls to add
2422  * @num_controls: number of elements in the array
2423  *
2424  * Return 0 for success, else error.
2425  */
2426 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2427         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2428 {
2429         return snd_soc_add_component_controls(&codec->component, controls,
2430                 num_controls);
2431 }
2432 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2433 
2434 /**
2435  * snd_soc_add_platform_controls - add an array of controls to a platform.
2436  * Convenience function to add a list of controls.
2437  *
2438  * @platform: platform to add controls to
2439  * @controls: array of controls to add
2440  * @num_controls: number of elements in the array
2441  *
2442  * Return 0 for success, else error.
2443  */
2444 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2445         const struct snd_kcontrol_new *controls, unsigned int num_controls)
2446 {
2447         return snd_soc_add_component_controls(&platform->component, controls,
2448                 num_controls);
2449 }
2450 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2451 
2452 /**
2453  * snd_soc_add_card_controls - add an array of controls to a SoC card.
2454  * Convenience function to add a list of controls.
2455  *
2456  * @soc_card: SoC card to add controls to
2457  * @controls: array of controls to add
2458  * @num_controls: number of elements in the array
2459  *
2460  * Return 0 for success, else error.
2461  */
2462 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2463         const struct snd_kcontrol_new *controls, int num_controls)
2464 {
2465         struct snd_card *card = soc_card->snd_card;
2466 
2467         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2468                         NULL, soc_card);
2469 }
2470 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2471 
2472 /**
2473  * snd_soc_add_dai_controls - add an array of controls to a DAI.
2474  * Convienience function to add a list of controls.
2475  *
2476  * @dai: DAI to add controls to
2477  * @controls: array of controls to add
2478  * @num_controls: number of elements in the array
2479  *
2480  * Return 0 for success, else error.
2481  */
2482 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2483         const struct snd_kcontrol_new *controls, int num_controls)
2484 {
2485         struct snd_card *card = dai->card->snd_card;
2486 
2487         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2488                         NULL, dai);
2489 }
2490 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2491 
2492 /**
2493  * snd_soc_info_enum_double - enumerated double mixer info callback
2494  * @kcontrol: mixer control
2495  * @uinfo: control element information
2496  *
2497  * Callback to provide information about a double enumerated
2498  * mixer control.
2499  *
2500  * Returns 0 for success.
2501  */
2502 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2503         struct snd_ctl_elem_info *uinfo)
2504 {
2505         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2506 
2507         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2508         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2509         uinfo->value.enumerated.items = e->items;
2510 
2511         if (uinfo->value.enumerated.item >= e->items)
2512                 uinfo->value.enumerated.item = e->items - 1;
2513         strlcpy(uinfo->value.enumerated.name,
2514                 e->texts[uinfo->value.enumerated.item],
2515                 sizeof(uinfo->value.enumerated.name));
2516         return 0;
2517 }
2518 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2519 
2520 /**
2521  * snd_soc_get_enum_double - enumerated double mixer get callback
2522  * @kcontrol: mixer control
2523  * @ucontrol: control element information
2524  *
2525  * Callback to get the value of a double enumerated mixer.
2526  *
2527  * Returns 0 for success.
2528  */
2529 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2530         struct snd_ctl_elem_value *ucontrol)
2531 {
2532         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2533         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2534         unsigned int val, item;
2535         unsigned int reg_val;
2536         int ret;
2537 
2538         ret = snd_soc_component_read(component, e->reg, &reg_val);
2539         if (ret)
2540                 return ret;
2541         val = (reg_val >> e->shift_l) & e->mask;
2542         item = snd_soc_enum_val_to_item(e, val);
2543         ucontrol->value.enumerated.item[0] = item;
2544         if (e->shift_l != e->shift_r) {
2545                 val = (reg_val >> e->shift_l) & e->mask;
2546                 item = snd_soc_enum_val_to_item(e, val);
2547                 ucontrol->value.enumerated.item[1] = item;
2548         }
2549 
2550         return 0;
2551 }
2552 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2553 
2554 /**
2555  * snd_soc_put_enum_double - enumerated double mixer put callback
2556  * @kcontrol: mixer control
2557  * @ucontrol: control element information
2558  *
2559  * Callback to set the value of a double enumerated mixer.
2560  *
2561  * Returns 0 for success.
2562  */
2563 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2564         struct snd_ctl_elem_value *ucontrol)
2565 {
2566         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2567         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2568         unsigned int *item = ucontrol->value.enumerated.item;
2569         unsigned int val;
2570         unsigned int mask;
2571 
2572         if (item[0] >= e->items)
2573                 return -EINVAL;
2574         val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
2575         mask = e->mask << e->shift_l;
2576         if (e->shift_l != e->shift_r) {
2577                 if (item[1] >= e->items)
2578                         return -EINVAL;
2579                 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
2580                 mask |= e->mask << e->shift_r;
2581         }
2582 
2583         return snd_soc_component_update_bits(component, e->reg, mask, val);
2584 }
2585 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2586 
2587 /**
2588  * snd_soc_read_signed - Read a codec register and interprete as signed value
2589  * @component: component
2590  * @reg: Register to read
2591  * @mask: Mask to use after shifting the register value
2592  * @shift: Right shift of register value
2593  * @sign_bit: Bit that describes if a number is negative or not.
2594  * @signed_val: Pointer to where the read value should be stored
2595  *
2596  * This functions reads a codec register. The register value is shifted right
2597  * by 'shift' bits and masked with the given 'mask'. Afterwards it translates
2598  * the given registervalue into a signed integer if sign_bit is non-zero.
2599  *
2600  * Returns 0 on sucess, otherwise an error value
2601  */
2602 static int snd_soc_read_signed(struct snd_soc_component *component,
2603         unsigned int reg, unsigned int mask, unsigned int shift,
2604         unsigned int sign_bit, int *signed_val)
2605 {
2606         int ret;
2607         unsigned int val;
2608 
2609         ret = snd_soc_component_read(component, reg, &val);
2610         if (ret < 0)
2611                 return ret;
2612 
2613         val = (val >> shift) & mask;
2614 
2615         if (!sign_bit) {
2616                 *signed_val = val;
2617                 return 0;
2618         }
2619 
2620         /* non-negative number */
2621         if (!(val & BIT(sign_bit))) {
2622                 *signed_val = val;
2623                 return 0;
2624         }
2625 
2626         ret = val;
2627 
2628         /*
2629          * The register most probably does not contain a full-sized int.
2630          * Instead we have an arbitrary number of bits in a signed
2631          * representation which has to be translated into a full-sized int.
2632          * This is done by filling up all bits above the sign-bit.
2633          */
2634         ret |= ~((int)(BIT(sign_bit) - 1));
2635 
2636         *signed_val = ret;
2637 
2638         return 0;
2639 }
2640 
2641 /**
2642  * snd_soc_info_volsw - single mixer info callback
2643  * @kcontrol: mixer control
2644  * @uinfo: control element information
2645  *
2646  * Callback to provide information about a single mixer control, or a double
2647  * mixer control that spans 2 registers.
2648  *
2649  * Returns 0 for success.
2650  */
2651 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2652         struct snd_ctl_elem_info *uinfo)
2653 {
2654         struct soc_mixer_control *mc =
2655                 (struct soc_mixer_control *)kcontrol->private_value;
2656         int platform_max;
2657 
2658         if (!mc->platform_max)
2659                 mc->platform_max = mc->max;
2660         platform_max = mc->platform_max;
2661 
2662         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2663                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2664         else
2665                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2666 
2667         uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2668         uinfo->value.integer.min = 0;
2669         uinfo->value.integer.max = platform_max - mc->min;
2670         return 0;
2671 }
2672 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2673 
2674 /**
2675  * snd_soc_get_volsw - single mixer get callback
2676  * @kcontrol: mixer control
2677  * @ucontrol: control element information
2678  *
2679  * Callback to get the value of a single mixer control, or a double mixer
2680  * control that spans 2 registers.
2681  *
2682  * Returns 0 for success.
2683  */
2684 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2685         struct snd_ctl_elem_value *ucontrol)
2686 {
2687         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2688         struct soc_mixer_control *mc =
2689                 (struct soc_mixer_control *)kcontrol->private_value;
2690         unsigned int reg = mc->reg;
2691         unsigned int reg2 = mc->rreg;
2692         unsigned int shift = mc->shift;
2693         unsigned int rshift = mc->rshift;
2694         int max = mc->max;
2695         int min = mc->min;
2696         int sign_bit = mc->sign_bit;
2697         unsigned int mask = (1 << fls(max)) - 1;
2698         unsigned int invert = mc->invert;
2699         int val;
2700         int ret;
2701 
2702         if (sign_bit)
2703                 mask = BIT(sign_bit + 1) - 1;
2704 
2705         ret = snd_soc_read_signed(component, reg, mask, shift, sign_bit, &val);
2706         if (ret)
2707                 return ret;
2708 
2709         ucontrol->value.integer.value[0] = val - min;
2710         if (invert)
2711                 ucontrol->value.integer.value[0] =
2712                         max - ucontrol->value.integer.value[0];
2713 
2714         if (snd_soc_volsw_is_stereo(mc)) {
2715                 if (reg == reg2)
2716                         ret = snd_soc_read_signed(component, reg, mask, rshift,
2717                                 sign_bit, &val);
2718                 else
2719                         ret = snd_soc_read_signed(component, reg2, mask, shift,
2720                                 sign_bit, &val);
2721                 if (ret)
2722                         return ret;
2723 
2724                 ucontrol->value.integer.value[1] = val - min;
2725                 if (invert)
2726                         ucontrol->value.integer.value[1] =
2727                                 max - ucontrol->value.integer.value[1];
2728         }
2729 
2730         return 0;
2731 }
2732 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2733 
2734 /**
2735  * snd_soc_put_volsw - single mixer put callback
2736  * @kcontrol: mixer control
2737  * @ucontrol: control element information
2738  *
2739  * Callback to set the value of a single mixer control, or a double mixer
2740  * control that spans 2 registers.
2741  *
2742  * Returns 0 for success.
2743  */
2744 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2745         struct snd_ctl_elem_value *ucontrol)
2746 {
2747         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2748         struct soc_mixer_control *mc =
2749                 (struct soc_mixer_control *)kcontrol->private_value;
2750         unsigned int reg = mc->reg;
2751         unsigned int reg2 = mc->rreg;
2752         unsigned int shift = mc->shift;
2753         unsigned int rshift = mc->rshift;
2754         int max = mc->max;
2755         int min = mc->min;
2756         unsigned int sign_bit = mc->sign_bit;
2757         unsigned int mask = (1 << fls(max)) - 1;
2758         unsigned int invert = mc->invert;
2759         int err;
2760         bool type_2r = false;
2761         unsigned int val2 = 0;
2762         unsigned int val, val_mask;
2763 
2764         if (sign_bit)
2765                 mask = BIT(sign_bit + 1) - 1;
2766 
2767         val = ((ucontrol->value.integer.value[0] + min) & mask);
2768         if (invert)
2769                 val = max - val;
2770         val_mask = mask << shift;
2771         val = val << shift;
2772         if (snd_soc_volsw_is_stereo(mc)) {
2773                 val2 = ((ucontrol->value.integer.value[1] + min) & mask);
2774                 if (invert)
2775                         val2 = max - val2;
2776                 if (reg == reg2) {
2777                         val_mask |= mask << rshift;
2778                         val |= val2 << rshift;
2779                 } else {
2780                         val2 = val2 << shift;
2781                         type_2r = true;
2782                 }
2783         }
2784         err = snd_soc_component_update_bits(component, reg, val_mask, val);
2785         if (err < 0)
2786                 return err;
2787 
2788         if (type_2r)
2789                 err = snd_soc_component_update_bits(component, reg2, val_mask,
2790                         val2);
2791 
2792         return err;
2793 }
2794 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2795 
2796 /**
2797  * snd_soc_get_volsw_sx - single mixer get callback
2798  * @kcontrol: mixer control
2799  * @ucontrol: control element information
2800  *
2801  * Callback to get the value of a single mixer control, or a double mixer
2802  * control that spans 2 registers.
2803  *
2804  * Returns 0 for success.
2805  */
2806 int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2807                       struct snd_ctl_elem_value *ucontrol)
2808 {
2809         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2810         struct soc_mixer_control *mc =
2811             (struct soc_mixer_control *)kcontrol->private_value;
2812         unsigned int reg = mc->reg;
2813         unsigned int reg2 = mc->rreg;
2814         unsigned int shift = mc->shift;
2815         unsigned int rshift = mc->rshift;
2816         int max = mc->max;
2817         int min = mc->min;
2818         int mask = (1 << (fls(min + max) - 1)) - 1;
2819         unsigned int val;
2820         int ret;
2821 
2822         ret = snd_soc_component_read(component, reg, &val);
2823         if (ret < 0)
2824                 return ret;
2825 
2826         ucontrol->value.integer.value[0] = ((val >> shift) - min) & mask;
2827 
2828         if (snd_soc_volsw_is_stereo(mc)) {
2829                 ret = snd_soc_component_read(component, reg2, &val);
2830                 if (ret < 0)
2831                         return ret;
2832 
2833                 val = ((val >> rshift) - min) & mask;
2834                 ucontrol->value.integer.value[1] = val;
2835         }
2836 
2837         return 0;
2838 }
2839 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2840 
2841 /**
2842  * snd_soc_put_volsw_sx - double mixer set callback
2843  * @kcontrol: mixer control
2844  * @uinfo: control element information
2845  *
2846  * Callback to set the value of a double mixer control that spans 2 registers.
2847  *
2848  * Returns 0 for success.
2849  */
2850 int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2851                          struct snd_ctl_elem_value *ucontrol)
2852 {
2853         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2854         struct soc_mixer_control *mc =
2855             (struct soc_mixer_control *)kcontrol->private_value;
2856 
2857         unsigned int reg = mc->reg;
2858         unsigned int reg2 = mc->rreg;
2859         unsigned int shift = mc->shift;
2860         unsigned int rshift = mc->rshift;
2861         int max = mc->max;
2862         int min = mc->min;
2863         int mask = (1 << (fls(min + max) - 1)) - 1;
2864         int err = 0;
2865         unsigned int val, val_mask, val2 = 0;
2866 
2867         val_mask = mask << shift;
2868         val = (ucontrol->value.integer.value[0] + min) & mask;
2869         val = val << shift;
2870 
2871         err = snd_soc_component_update_bits(component, reg, val_mask, val);
2872         if (err < 0)
2873                 return err;
2874 
2875         if (snd_soc_volsw_is_stereo(mc)) {
2876                 val_mask = mask << rshift;
2877                 val2 = (ucontrol->value.integer.value[1] + min) & mask;
2878                 val2 = val2 << rshift;
2879 
2880                 err = snd_soc_component_update_bits(component, reg2, val_mask,
2881                         val2);
2882         }
2883         return err;
2884 }
2885 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2886 
2887 /**
2888  * snd_soc_info_volsw_s8 - signed mixer info callback
2889  * @kcontrol: mixer control
2890  * @uinfo: control element information
2891  *
2892  * Callback to provide information about a signed mixer control.
2893  *
2894  * Returns 0 for success.
2895  */
2896 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2897         struct snd_ctl_elem_info *uinfo)
2898 {
2899         struct soc_mixer_control *mc =
2900                 (struct soc_mixer_control *)kcontrol->private_value;
2901         int platform_max;
2902         int min = mc->min;
2903 
2904         if (!mc->platform_max)
2905                 mc->platform_max = mc->max;
2906         platform_max = mc->platform_max;
2907 
2908         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2909         uinfo->count = 2;
2910         uinfo->value.integer.min = 0;
2911         uinfo->value.integer.max = platform_max - min;
2912         return 0;
2913 }
2914 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2915 
2916 /**
2917  * snd_soc_get_volsw_s8 - signed mixer get callback
2918  * @kcontrol: mixer control
2919  * @ucontrol: control element information
2920  *
2921  * Callback to get the value of a signed mixer control.
2922  *
2923  * Returns 0 for success.
2924  */
2925 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2926         struct snd_ctl_elem_value *ucontrol)
2927 {
2928         struct soc_mixer_control *mc =
2929                 (struct soc_mixer_control *)kcontrol->private_value;
2930         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2931         unsigned int reg = mc->reg;
2932         unsigned int val;
2933         int min = mc->min;
2934         int ret;
2935 
2936         ret = snd_soc_component_read(component, reg, &val);
2937         if (ret)
2938                 return ret;
2939 
2940         ucontrol->value.integer.value[0] =
2941                 ((signed char)(val & 0xff))-min;
2942         ucontrol->value.integer.value[1] =
2943                 ((signed char)((val >> 8) & 0xff))-min;
2944         return 0;
2945 }
2946 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2947 
2948 /**
2949  * snd_soc_put_volsw_sgn - signed mixer put callback
2950  * @kcontrol: mixer control
2951  * @ucontrol: control element information
2952  *
2953  * Callback to set the value of a signed mixer control.
2954  *
2955  * Returns 0 for success.
2956  */
2957 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2958         struct snd_ctl_elem_value *ucontrol)
2959 {
2960         struct soc_mixer_control *mc =
2961                 (struct soc_mixer_control *)kcontrol->private_value;
2962         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
2963         unsigned int reg = mc->reg;
2964         int min = mc->min;
2965         unsigned int val;
2966 
2967         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2968         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2969 
2970         return snd_soc_component_update_bits(component, reg, 0xffff, val);
2971 }
2972 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2973 
2974 /**
2975  * snd_soc_info_volsw_range - single mixer info callback with range.
2976  * @kcontrol: mixer control
2977  * @uinfo: control element information
2978  *
2979  * Callback to provide information, within a range, about a single
2980  * mixer control.
2981  *
2982  * returns 0 for success.
2983  */
2984 int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
2985         struct snd_ctl_elem_info *uinfo)
2986 {
2987         struct soc_mixer_control *mc =
2988                 (struct soc_mixer_control *)kcontrol->private_value;
2989         int platform_max;
2990         int min = mc->min;
2991 
2992         if (!mc->platform_max)
2993                 mc->platform_max = mc->max;
2994         platform_max = mc->platform_max;
2995 
2996         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2997         uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2998         uinfo->value.integer.min = 0;
2999         uinfo->value.integer.max = platform_max - min;
3000 
3001         return 0;
3002 }
3003 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
3004 
3005 /**
3006  * snd_soc_put_volsw_range - single mixer put value callback with range.
3007  * @kcontrol: mixer control
3008  * @ucontrol: control element information
3009  *
3010  * Callback to set the value, within a range, for a single mixer control.
3011  *
3012  * Returns 0 for success.
3013  */
3014 int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
3015         struct snd_ctl_elem_value *ucontrol)
3016 {
3017         struct soc_mixer_control *mc =
3018                 (struct soc_mixer_control *)kcontrol->private_value;
3019         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3020         unsigned int reg = mc->reg;
3021         unsigned int rreg = mc->rreg;
3022         unsigned int shift = mc->shift;
3023         int min = mc->min;
3024         int max = mc->max;
3025         unsigned int mask = (1 << fls(max)) - 1;
3026         unsigned int invert = mc->invert;
3027         unsigned int val, val_mask;
3028         int ret;
3029 
3030         val = ((ucontrol->value.integer.value[0] + min) & mask);
3031         if (invert)
3032                 val = max - val;
3033         val_mask = mask << shift;
3034         val = val << shift;
3035 
3036         ret = snd_soc_component_update_bits(component, reg, val_mask, val);
3037         if (ret < 0)
3038                 return ret;
3039 
3040         if (snd_soc_volsw_is_stereo(mc)) {
3041                 val = ((ucontrol->value.integer.value[1] + min) & mask);
3042                 if (invert)
3043                         val = max - val;
3044                 val_mask = mask << shift;
3045                 val = val << shift;
3046 
3047                 ret = snd_soc_component_update_bits(component, rreg, val_mask,
3048                         val);
3049         }
3050 
3051         return ret;
3052 }
3053 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
3054 
3055 /**
3056  * snd_soc_get_volsw_range - single mixer get callback with range
3057  * @kcontrol: mixer control
3058  * @ucontrol: control element information
3059  *
3060  * Callback to get the value, within a range, of a single mixer control.
3061  *
3062  * Returns 0 for success.
3063  */
3064 int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
3065         struct snd_ctl_elem_value *ucontrol)
3066 {
3067         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3068         struct soc_mixer_control *mc =
3069                 (struct soc_mixer_control *)kcontrol->private_value;
3070         unsigned int reg = mc->reg;
3071         unsigned int rreg = mc->rreg;
3072         unsigned int shift = mc->shift;
3073         int min = mc->min;
3074         int max = mc->max;
3075         unsigned int mask = (1 << fls(max)) - 1;
3076         unsigned int invert = mc->invert;
3077         unsigned int val;
3078         int ret;
3079 
3080         ret = snd_soc_component_read(component, reg, &val);
3081         if (ret)
3082                 return ret;
3083 
3084         ucontrol->value.integer.value[0] = (val >> shift) & mask;
3085         if (invert)
3086                 ucontrol->value.integer.value[0] =
3087                         max - ucontrol->value.integer.value[0];
3088         ucontrol->value.integer.value[0] =
3089                 ucontrol->value.integer.value[0] - min;
3090 
3091         if (snd_soc_volsw_is_stereo(mc)) {
3092                 ret = snd_soc_component_read(component, rreg, &val);
3093                 if (ret)
3094                         return ret;
3095 
3096                 ucontrol->value.integer.value[1] = (val >> shift) & mask;
3097                 if (invert)
3098                         ucontrol->value.integer.value[1] =
3099                                 max - ucontrol->value.integer.value[1];
3100                 ucontrol->value.integer.value[1] =
3101                         ucontrol->value.integer.value[1] - min;
3102         }
3103 
3104         return 0;
3105 }
3106 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
3107 
3108 /**
3109  * snd_soc_limit_volume - Set new limit to an existing volume control.
3110  *
3111  * @codec: where to look for the control
3112  * @name: Name of the control
3113  * @max: new maximum limit
3114  *
3115  * Return 0 for success, else error.
3116  */
3117 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3118         const char *name, int max)
3119 {
3120         struct snd_card *card = codec->component.card->snd_card;
3121         struct snd_kcontrol *kctl;
3122         struct soc_mixer_control *mc;
3123         int found = 0;
3124         int ret = -EINVAL;
3125 
3126         /* Sanity check for name and max */
3127         if (unlikely(!name || max <= 0))
3128                 return -EINVAL;
3129 
3130         list_for_each_entry(kctl, &card->controls, list) {
3131                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3132                         found = 1;
3133                         break;
3134                 }
3135         }
3136         if (found) {
3137                 mc = (struct soc_mixer_control *)kctl->private_value;
3138                 if (max <= mc->max) {
3139                         mc->platform_max = max;
3140                         ret = 0;
3141                 }
3142         }
3143         return ret;
3144 }
3145 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3146 
3147 int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
3148                        struct snd_ctl_elem_info *uinfo)
3149 {
3150         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3151         struct soc_bytes *params = (void *)kcontrol->private_value;
3152 
3153         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3154         uinfo->count = params->num_regs * component->val_bytes;
3155 
3156         return 0;
3157 }
3158 EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
3159 
3160 int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
3161                       struct snd_ctl_elem_value *ucontrol)
3162 {
3163         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3164         struct soc_bytes *params = (void *)kcontrol->private_value;
3165         int ret;
3166 
3167         if (component->regmap)
3168                 ret = regmap_raw_read(component->regmap, params->base,
3169                                       ucontrol->value.bytes.data,
3170                                       params->num_regs * component->val_bytes);
3171         else
3172                 ret = -EINVAL;
3173 
3174         /* Hide any masked bytes to ensure consistent data reporting */
3175         if (ret == 0 && params->mask) {
3176                 switch (component->val_bytes) {
3177                 case 1:
3178                         ucontrol->value.bytes.data[0] &= ~params->mask;
3179                         break;
3180                 case 2:
3181                         ((u16 *)(&ucontrol->value.bytes.data))[0]
3182                                 &= cpu_to_be16(~params->mask);
3183                         break;
3184                 case 4:
3185                         ((u32 *)(&ucontrol->value.bytes.data))[0]
3186                                 &= cpu_to_be32(~params->mask);
3187                         break;
3188                 default:
3189                         return -EINVAL;
3190                 }
3191         }
3192 
3193         return ret;
3194 }
3195 EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
3196 
3197 int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
3198                       struct snd_ctl_elem_value *ucontrol)
3199 {
3200         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3201         struct soc_bytes *params = (void *)kcontrol->private_value;
3202         int ret, len;
3203         unsigned int val, mask;
3204         void *data;
3205 
3206         if (!component->regmap || !params->num_regs)
3207                 return -EINVAL;
3208 
3209         len = params->num_regs * component->val_bytes;
3210 
3211         data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
3212         if (!data)
3213                 return -ENOMEM;
3214 
3215         /*
3216          * If we've got a mask then we need to preserve the register
3217          * bits.  We shouldn't modify the incoming data so take a
3218          * copy.
3219          */
3220         if (params->mask) {
3221                 ret = regmap_read(component->regmap, params->base, &val);
3222                 if (ret != 0)
3223                         goto out;
3224 
3225                 val &= params->mask;
3226 
3227                 switch (component->val_bytes) {
3228                 case 1:
3229                         ((u8 *)data)[0] &= ~params->mask;
3230                         ((u8 *)data)[0] |= val;
3231                         break;
3232                 case 2:
3233                         mask = ~params->mask;
3234                         ret = regmap_parse_val(component->regmap,
3235                                                         &mask, &mask);
3236                         if (ret != 0)
3237                                 goto out;
3238 
3239                         ((u16 *)data)[0] &= mask;
3240 
3241                         ret = regmap_parse_val(component->regmap,
3242                                                         &val, &val);
3243                         if (ret != 0)
3244                                 goto out;
3245 
3246                         ((u16 *)data)[0] |= val;
3247                         break;
3248                 case 4:
3249                         mask = ~params->mask;
3250                         ret = regmap_parse_val(component->regmap,
3251                                                         &mask, &mask);
3252                         if (ret != 0)
3253                                 goto out;
3254 
3255                         ((u32 *)data)[0] &= mask;
3256 
3257                         ret = regmap_parse_val(component->regmap,
3258                                                         &val, &val);
3259                         if (ret != 0)
3260                                 goto out;
3261 
3262                         ((u32 *)data)[0] |= val;
3263                         break;
3264                 default:
3265                         ret = -EINVAL;
3266                         goto out;
3267                 }
3268         }
3269 
3270         ret = regmap_raw_write(component->regmap, params->base,
3271                                data, len);
3272 
3273 out:
3274         kfree(data);
3275 
3276         return ret;
3277 }
3278 EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
3279 
3280 int snd_soc_bytes_info_ext(struct snd_kcontrol *kcontrol,
3281                         struct snd_ctl_elem_info *ucontrol)
3282 {
3283         struct soc_bytes_ext *params = (void *)kcontrol->private_value;
3284 
3285         ucontrol->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3286         ucontrol->count = params->max;
3287 
3288         return 0;
3289 }
3290 EXPORT_SYMBOL_GPL(snd_soc_bytes_info_ext);
3291 
3292 int snd_soc_bytes_tlv_callback(struct snd_kcontrol *kcontrol, int op_flag,
3293                                 unsigned int size, unsigned int __user *tlv)
3294 {
3295         struct soc_bytes_ext *params = (void *)kcontrol->private_value;
3296         unsigned int count = size < params->max ? size : params->max;
3297         int ret = -ENXIO;
3298 
3299         switch (op_flag) {
3300         case SNDRV_CTL_TLV_OP_READ:
3301                 if (params->get)
3302                         ret = params->get(tlv, count);
3303                 break;
3304         case SNDRV_CTL_TLV_OP_WRITE:
3305                 if (params->put)
3306                         ret = params->put(tlv, count);
3307                 break;
3308         }
3309         return ret;
3310 }
3311 EXPORT_SYMBOL_GPL(snd_soc_bytes_tlv_callback);
3312 
3313 /**
3314  * snd_soc_info_xr_sx - signed multi register info callback
3315  * @kcontrol: mreg control
3316  * @uinfo: control element information
3317  *
3318  * Callback to provide information of a control that can
3319  * span multiple codec registers which together
3320  * forms a single signed value in a MSB/LSB manner.
3321  *
3322  * Returns 0 for success.
3323  */
3324 int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
3325         struct snd_ctl_elem_info *uinfo)
3326 {
3327         struct soc_mreg_control *mc =
3328                 (struct soc_mreg_control *)kcontrol->private_value;
3329         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3330         uinfo->count = 1;
3331         uinfo->value.integer.min = mc->min;
3332         uinfo->value.integer.max = mc->max;
3333 
3334         return 0;
3335 }
3336 EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
3337 
3338 /**
3339  * snd_soc_get_xr_sx - signed multi register get callback
3340  * @kcontrol: mreg control
3341  * @ucontrol: control element information
3342  *
3343  * Callback to get the value of a control that can span
3344  * multiple codec registers which together forms a single
3345  * signed value in a MSB/LSB manner. The control supports
3346  * specifying total no of bits used to allow for bitfields
3347  * across the multiple codec registers.
3348  *
3349  * Returns 0 for success.
3350  */
3351 int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
3352         struct snd_ctl_elem_value *ucontrol)
3353 {
3354         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3355         struct soc_mreg_control *mc =
3356                 (struct soc_mreg_control *)kcontrol->private_value;
3357         unsigned int regbase = mc->regbase;
3358         unsigned int regcount = mc->regcount;
3359         unsigned int regwshift = component->val_bytes * BITS_PER_BYTE;
3360         unsigned int regwmask = (1<<regwshift)-1;
3361         unsigned int invert = mc->invert;
3362         unsigned long mask = (1UL<<mc->nbits)-1;
3363         long min = mc->min;
3364         long max = mc->max;
3365         long val = 0;
3366         unsigned int regval;
3367         unsigned int i;
3368         int ret;
3369 
3370         for (i = 0; i < regcount; i++) {
3371                 ret = snd_soc_component_read(component, regbase+i, &regval);
3372                 if (ret)
3373                         return ret;
3374                 val |= (regval & regwmask) << (regwshift*(regcount-i-1));
3375         }
3376         val &= mask;
3377         if (min < 0 && val > max)
3378                 val |= ~mask;
3379         if (invert)
3380                 val = max - val;
3381         ucontrol->value.integer.value[0] = val;
3382 
3383         return 0;
3384 }
3385 EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3386 
3387 /**
3388  * snd_soc_put_xr_sx - signed multi register get callback
3389  * @kcontrol: mreg control
3390  * @ucontrol: control element information
3391  *
3392  * Callback to set the value of a control that can span
3393  * multiple codec registers which together forms a single
3394  * signed value in a MSB/LSB manner. The control supports
3395  * specifying total no of bits used to allow for bitfields
3396  * across the multiple codec registers.
3397  *
3398  * Returns 0 for success.
3399  */
3400 int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3401         struct snd_ctl_elem_value *ucontrol)
3402 {
3403         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3404         struct soc_mreg_control *mc =
3405                 (struct soc_mreg_control *)kcontrol->private_value;
3406         unsigned int regbase = mc->regbase;
3407         unsigned int regcount = mc->regcount;
3408         unsigned int regwshift = component->val_bytes * BITS_PER_BYTE;
3409         unsigned int regwmask = (1<<regwshift)-1;
3410         unsigned int invert = mc->invert;
3411         unsigned long mask = (1UL<<mc->nbits)-1;
3412         long max = mc->max;
3413         long val = ucontrol->value.integer.value[0];
3414         unsigned int i, regval, regmask;
3415         int err;
3416 
3417         if (invert)
3418                 val = max - val;
3419         val &= mask;
3420         for (i = 0; i < regcount; i++) {
3421                 regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3422                 regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3423                 err = snd_soc_component_update_bits(component, regbase+i,
3424                                 regmask, regval);
3425                 if (err < 0)
3426                         return err;
3427         }
3428 
3429         return 0;
3430 }
3431 EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3432 
3433 /**
3434  * snd_soc_get_strobe - strobe get callback
3435  * @kcontrol: mixer control
3436  * @ucontrol: control element information
3437  *
3438  * Callback get the value of a strobe mixer control.
3439  *
3440  * Returns 0 for success.
3441  */
3442 int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3443         struct snd_ctl_elem_value *ucontrol)
3444 {
3445         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3446         struct soc_mixer_control *mc =
3447                 (struct soc_mixer_control *)kcontrol->private_value;
3448         unsigned int reg = mc->reg;
3449         unsigned int shift = mc->shift;
3450         unsigned int mask = 1 << shift;
3451         unsigned int invert = mc->invert != 0;
3452         unsigned int val;
3453         int ret;
3454 
3455         ret = snd_soc_component_read(component, reg, &val);
3456         if (ret)
3457                 return ret;
3458 
3459         val &= mask;
3460 
3461         if (shift != 0 && val != 0)
3462                 val = val >> shift;
3463         ucontrol->value.enumerated.item[0] = val ^ invert;
3464 
3465         return 0;
3466 }
3467 EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3468 
3469 /**
3470  * snd_soc_put_strobe - strobe put callback
3471  * @kcontrol: mixer control
3472  * @ucontrol: control element information
3473  *
3474  * Callback strobe a register bit to high then low (or the inverse)
3475  * in one pass of a single mixer enum control.
3476  *
3477  * Returns 1 for success.
3478  */
3479 int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3480         struct snd_ctl_elem_value *ucontrol)
3481 {
3482         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
3483         struct soc_mixer_control *mc =
3484                 (struct soc_mixer_control *)kcontrol->private_value;
3485         unsigned int reg = mc->reg;
3486         unsigned int shift = mc->shift;
3487         unsigned int mask = 1 << shift;
3488         unsigned int invert = mc->invert != 0;
3489         unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3490         unsigned int val1 = (strobe ^ invert) ? mask : 0;
3491         unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3492         int err;
3493 
3494         err = snd_soc_component_update_bits(component, reg, mask, val1);
3495         if (err < 0)
3496                 return err;
3497 
3498         return snd_soc_component_update_bits(component, reg, mask, val2);
3499 }
3500 EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3501 
3502 /**
3503  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3504  * @dai: DAI
3505  * @clk_id: DAI specific clock ID
3506  * @freq: new clock frequency in Hz
3507  * @dir: new clock direction - input/output.
3508  *
3509  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3510  */
3511 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3512         unsigned int freq, int dir)
3513 {
3514         if (dai->driver && dai->driver->ops->set_sysclk)
3515                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3516         else if (dai->codec && dai->codec->driver->set_sysclk)
3517                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3518                                                       freq, dir);
3519         else
3520                 return -ENOTSUPP;
3521 }
3522 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3523 
3524 /**
3525  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3526  * @codec: CODEC
3527  * @clk_id: DAI specific clock ID
3528  * @source: Source for the clock
3529  * @freq: new clock frequency in Hz
3530  * @dir: new clock direction - input/output.
3531  *
3532  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3533  */
3534 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3535                              int source, unsigned int freq, int dir)
3536 {
3537         if (codec->driver->set_sysclk)
3538                 return codec->driver->set_sysclk(codec, clk_id, source,
3539                                                  freq, dir);
3540         else
3541                 return -ENOTSUPP;
3542 }
3543 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3544 
3545 /**
3546  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3547  * @dai: DAI
3548  * @div_id: DAI specific clock divider ID
3549  * @div: new clock divisor.
3550  *
3551  * Configures the clock dividers. This is used to derive the best DAI bit and
3552  * frame clocks from the system or master clock. It's best to set the DAI bit
3553  * and frame clocks as low as possible to save system power.
3554  */
3555 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3556         int div_id, int div)
3557 {
3558         if (dai->driver && dai->driver->ops->set_clkdiv)
3559                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3560         else
3561                 return -EINVAL;
3562 }
3563 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3564 
3565 /**
3566  * snd_soc_dai_set_pll - configure DAI PLL.
3567  * @dai: DAI
3568  * @pll_id: DAI specific PLL ID
3569  * @source: DAI specific source for the PLL
3570  * @freq_in: PLL input clock frequency in Hz
3571  * @freq_out: requested PLL output clock frequency in Hz
3572  *
3573  * Configures and enables PLL to generate output clock based on input clock.
3574  */
3575 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3576         unsigned int freq_in, unsigned int freq_out)
3577 {
3578         if (dai->driver && dai->driver->ops->set_pll)
3579                 return dai->driver->ops->set_pll(dai, pll_id, source,
3580                                          freq_in, freq_out);
3581         else if (dai->codec && dai->codec->driver->set_pll)
3582                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3583                                                    freq_in, freq_out);
3584         else
3585                 return -EINVAL;
3586 }
3587 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3588 
3589 /*
3590  * snd_soc_codec_set_pll - configure codec PLL.
3591  * @codec: CODEC
3592  * @pll_id: DAI specific PLL ID
3593  * @source: DAI specific source for the PLL
3594  * @freq_in: PLL input clock frequency in Hz
3595  * @freq_out: requested PLL output clock frequency in Hz
3596  *
3597  * Configures and enables PLL to generate output clock based on input clock.
3598  */
3599 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3600                           unsigned int freq_in, unsigned int freq_out)
3601 {
3602         if (codec->driver->set_pll)
3603                 return codec->driver->set_pll(codec, pll_id, source,
3604                                               freq_in, freq_out);
3605         else
3606                 return -EINVAL;
3607 }
3608 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3609 
3610 /**
3611  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
3612  * @dai: DAI
3613  * @ratio Ratio of BCLK to Sample rate.
3614  *
3615  * Configures the DAI for a preset BCLK to sample rate ratio.
3616  */
3617 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
3618 {
3619         if (dai->driver && dai->driver->ops->set_bclk_ratio)
3620                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
3621         else
3622                 return -EINVAL;
3623 }
3624 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
3625 
3626 /**
3627  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3628  * @dai: DAI
3629  * @fmt: SND_SOC_DAIFMT_ format value.
3630  *
3631  * Configures the DAI hardware format and clocking.
3632  */
3633 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3634 {
3635         if (dai->driver == NULL)
3636                 return -EINVAL;
3637         if (dai->driver->ops->set_fmt == NULL)
3638                 return -ENOTSUPP;
3639         return dai->driver->ops->set_fmt(dai, fmt);
3640 }
3641 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3642 
3643 /**
3644  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
3645  * @slots: Number of slots in use.
3646  * @tx_mask: bitmask representing active TX slots.
3647  * @rx_mask: bitmask representing active RX slots.
3648  *
3649  * Generates the TDM tx and rx slot default masks for DAI.
3650  */
3651 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
3652                                           unsigned int *tx_mask,
3653                                           unsigned int *rx_mask)
3654 {
3655         if (*tx_mask || *rx_mask)
3656                 return 0;
3657 
3658         if (!slots)
3659                 return -EINVAL;
3660 
3661         *tx_mask = (1 << slots) - 1;
3662         *rx_mask = (1 << slots) - 1;
3663 
3664         return 0;
3665 }
3666 
3667 /**
3668  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3669  * @dai: DAI
3670  * @tx_mask: bitmask representing active TX slots.
3671  * @rx_mask: bitmask representing active RX slots.
3672  * @slots: Number of slots in use.
3673  * @slot_width: Width in bits for each slot.
3674  *
3675  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3676  * specific.
3677  */
3678 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3679         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3680 {
3681         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
3682                 dai->driver->ops->xlate_tdm_slot_mask(slots,
3683                                                 &tx_mask, &rx_mask);
3684         else
3685                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
3686 
3687         dai->tx_mask = tx_mask;
3688         dai->rx_mask = rx_mask;
3689 
3690         if (dai->driver && dai->driver->ops->set_tdm_slot)
3691                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3692                                 slots, slot_width);
3693         else
3694                 return -ENOTSUPP;
3695 }
3696 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3697 
3698 /**
3699  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3700  * @dai: DAI
3701  * @tx_num: how many TX channels
3702  * @tx_slot: pointer to an array which imply the TX slot number channel
3703  *           0~num-1 uses
3704  * @rx_num: how many RX channels
3705  * @rx_slot: pointer to an array which imply the RX slot number channel
3706  *           0~num-1 uses
3707  *
3708  * configure the relationship between channel number and TDM slot number.
3709  */
3710 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3711         unsigned int tx_num, unsigned int *tx_slot,
3712         unsigned int rx_num, unsigned int *rx_slot)
3713 {
3714         if (dai->driver && dai->driver->ops->set_channel_map)
3715                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3716                         rx_num, rx_slot);
3717         else
3718                 return -EINVAL;
3719 }
3720 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3721 
3722 /**
3723  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3724  * @dai: DAI
3725  * @tristate: tristate enable
3726  *
3727  * Tristates the DAI so that others can use it.
3728  */
3729 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3730 {
3731         if (dai->driver && dai->driver->ops->set_tristate)
3732                 return dai->driver->ops->set_tristate(dai, tristate);
3733         else
3734                 return -EINVAL;
3735 }
3736 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3737 
3738 /**
3739  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3740  * @dai: DAI
3741  * @mute: mute enable
3742  * @direction: stream to mute
3743  *
3744  * Mutes the DAI DAC.
3745  */
3746 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
3747                              int direction)
3748 {
3749         if (!dai->driver)
3750                 return -ENOTSUPP;
3751 
3752         if (dai->driver->ops->mute_stream)
3753                 return dai->driver->ops->mute_stream(dai, mute, direction);
3754         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
3755                  dai->driver->ops->digital_mute)
3756                 return dai->driver->ops->digital_mute(dai, mute);
3757         else
3758                 return -ENOTSUPP;
3759 }
3760 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3761 
3762 static int snd_soc_init_multicodec(struct snd_soc_card *card,
3763                                    struct snd_soc_dai_link *dai_link)
3764 {
3765         /* Legacy codec/codec_dai link is a single entry in multicodec */
3766         if (dai_link->codec_name || dai_link->codec_of_node ||
3767             dai_link->codec_dai_name) {
3768                 dai_link->num_codecs = 1;
3769 
3770                 dai_link->codecs = devm_kzalloc(card->dev,
3771                                 sizeof(struct snd_soc_dai_link_component),
3772                                 GFP_KERNEL);
3773                 if (!dai_link->codecs)
3774                         return -ENOMEM;
3775 
3776                 dai_link->codecs[0].name = dai_link->codec_name;
3777                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
3778                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
3779         }
3780 
3781         if (!dai_link->codecs) {
3782                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
3783                 return -EINVAL;
3784         }
3785 
3786         return 0;
3787 }
3788 
3789 /**
3790  * snd_soc_register_card - Register a card with the ASoC core
3791  *
3792  * @card: Card to register
3793  *
3794  */
3795 int snd_soc_register_card(struct snd_soc_card *card)
3796 {
3797         int i, j, ret;
3798 
3799         if (!card->name || !card->dev)
3800                 return -EINVAL;
3801 
3802         for (i = 0; i < card->num_links; i++) {
3803                 struct snd_soc_dai_link *link = &card->dai_link[i];
3804 
3805                 ret = snd_soc_init_multicodec(card, link);
3806                 if (ret) {
3807                         dev_err(card->dev, "ASoC: failed to init multicodec\n");
3808                         return ret;
3809                 }
3810 
3811                 for (j = 0; j < link->num_codecs; j++) {
3812                         /*
3813                          * Codec must be specified by 1 of name or OF node,
3814                          * not both or neither.
3815                          */
3816                         if (!!link->codecs[j].name ==
3817                             !!link->codecs[j].of_node) {
3818                                 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
3819                                         link->name);
3820                                 return -EINVAL;
3821                         }
3822                         /* Codec DAI name must be specified */
3823                         if (!link->codecs[j].dai_name) {
3824                                 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
3825                                         link->name);
3826                                 return -EINVAL;
3827                         }
3828                 }
3829 
3830                 /*
3831                  * Platform may be specified by either name or OF node, but
3832                  * can be left unspecified, and a dummy platform will be used.
3833                  */
3834                 if (link->platform_name && link->platform_of_node) {
3835                         dev_err(card->dev,
3836                                 "ASoC: Both platform name/of_node are set for %s\n",
3837                                 link->name);
3838                         return -EINVAL;
3839                 }
3840 
3841                 /*
3842                  * CPU device may be specified by either name or OF node, but
3843                  * can be left unspecified, and will be matched based on DAI
3844                  * name alone..
3845                  */
3846                 if (link->cpu_name && link->cpu_of_node) {
3847                         dev_err(card->dev,
3848                                 "ASoC: Neither/both cpu name/of_node are set for %s\n",
3849                                 link->name);
3850                         return -EINVAL;
3851                 }
3852                 /*
3853                  * At least one of CPU DAI name or CPU device name/node must be
3854                  * specified
3855                  */
3856                 if (!link->cpu_dai_name &&
3857                     !(link->cpu_name || link->cpu_of_node)) {
3858                         dev_err(card->dev,
3859                                 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
3860                                 link->name);
3861                         return -EINVAL;
3862                 }
3863         }
3864 
3865         dev_set_drvdata(card->dev, card);
3866 
3867         snd_soc_initialize_card_lists(card);
3868 
3869         soc_init_card_debugfs(card);
3870 
3871         card->rtd = devm_kzalloc(card->dev,
3872                                  sizeof(struct snd_soc_pcm_runtime) *
3873                                  (card->num_links + card->num_aux_devs),
3874                                  GFP_KERNEL);
3875         if (card->rtd == NULL)
3876                 return -ENOMEM;
3877         card->num_rtd = 0;
3878         card->rtd_aux = &card->rtd[card->num_links];
3879 
3880         for (i = 0; i < card->num_links; i++) {
3881                 card->rtd[i].card = card;
3882                 card->rtd[i].dai_link = &card->dai_link[i];
3883                 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
3884                                         sizeof(struct snd_soc_dai *) *
3885                                         (card->rtd[i].dai_link->num_codecs),
3886                                         GFP_KERNEL);
3887                 if (card->rtd[i].codec_dais == NULL)
3888                         return -ENOMEM;
3889         }
3890 
3891         for (i = 0; i < card->num_aux_devs; i++)
3892                 card->rtd_aux[i].card = card;
3893 
3894         INIT_LIST_HEAD(&card->dapm_dirty);
3895         card->instantiated = 0;
3896         mutex_init(&card->mutex);
3897         mutex_init(&card->dapm_mutex);
3898 
3899         ret = snd_soc_instantiate_card(card);
3900         if (ret != 0)
3901                 soc_cleanup_card_debugfs(card);
3902 
3903         /* deactivate pins to sleep state */
3904         for (i = 0; i < card->num_rtd; i++) {
3905                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
3906                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3907                 int j;
3908 
3909                 for (j = 0; j < rtd->num_codecs; j++) {
3910                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
3911                         if (!codec_dai->active)
3912                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
3913                 }
3914 
3915                 if (!cpu_dai->active)
3916                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
3917         }
3918 
3919         return ret;
3920 }
3921 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3922 
3923 /**
3924  * snd_soc_unregister_card - Unregister a card with the ASoC core
3925  *
3926  * @card: Card to unregister
3927  *
3928  */
3929 int snd_soc_unregister_card(struct snd_soc_card *card)
3930 {
3931         if (card->instantiated)
3932                 soc_cleanup_card_resources(card);
3933         dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3934 
3935         return 0;
3936 }
3937 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3938 
3939 /*
3940  * Simplify DAI link configuration by removing ".-1" from device names
3941  * and sanitizing names.
3942  */
3943 static char *fmt_single_name(struct device *dev, int *id)
3944 {
3945         char *found, name[NAME_SIZE];
3946         int id1, id2;
3947 
3948         if (dev_name(dev) == NULL)
3949                 return NULL;
3950 
3951         strlcpy(name, dev_name(dev), NAME_SIZE);
3952 
3953         /* are we a "%s.%d" name (platform and SPI components) */
3954         found = strstr(name, dev->driver->name);
3955         if (found) {
3956                 /* get ID */
3957                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3958 
3959                         /* discard ID from name if ID == -1 */
3960                         if (*id == -1)
3961                                 found[strlen(dev->driver->name)] = '\0';
3962                 }
3963 
3964         } else {
3965                 /* I2C component devices are named "bus-addr"  */
3966                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3967                         char tmp[NAME_SIZE];
3968 
3969                         /* create unique ID number from I2C addr and bus */
3970                         *id = ((id1 & 0xffff) << 16) + id2;
3971 
3972                         /* sanitize component name for DAI link creation */
3973                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3974                         strlcpy(name, tmp, NAME_SIZE);
3975                 } else
3976                         *id = 0;
3977         }
3978 
3979         return kstrdup(name, GFP_KERNEL);
3980 }
3981 
3982 /*
3983  * Simplify DAI link naming for single devices with multiple DAIs by removing
3984  * any ".-1" and using the DAI name (instead of device name).
3985  */
3986 static inline char *fmt_multiple_name(struct device *dev,
3987                 struct snd_soc_dai_driver *dai_drv)
3988 {
3989         if (dai_drv->name == NULL) {
3990                 dev_err(dev,
3991                         "ASoC: error - multiple DAI %s registered with no name\n",
3992                         dev_name(dev));
3993                 return NULL;
3994         }
3995 
3996         return kstrdup(dai_drv->name, GFP_KERNEL);
3997 }
3998 
3999 /**
4000  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
4001  *
4002  * @component: The component for which the DAIs should be unregistered
4003  */
4004 static void snd_soc_unregister_dais(struct snd_soc_component *component)
4005 {
4006         struct snd_soc_dai *dai, *_dai;
4007 
4008         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
4009                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
4010                         dai->name);
4011                 list_del(&dai->list);
4012                 kfree(dai->name);
4013                 kfree(dai);
4014         }
4015 }
4016 
4017 /**
4018  * snd_soc_register_dais - Register a DAI with the ASoC core
4019  *
4020  * @component: The component the DAIs are registered for
4021  * @dai_drv: DAI driver to use for the DAIs
4022  * @count: Number of DAIs
4023  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
4024  *                     parent's name.
4025  */
4026 static int snd_soc_register_dais(struct snd_soc_component *component,
4027         struct snd_soc_dai_driver *dai_drv, size_t count,
4028         bool legacy_dai_naming)
4029 {
4030         struct device *dev = component->dev;
4031         struct snd_soc_dai *dai;
4032         unsigned int i;
4033         int ret;
4034 
4035         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
4036 
4037         component->dai_drv = dai_drv;
4038         component->num_dai = count;
4039 
4040         for (i = 0; i < count; i++) {
4041 
4042                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
4043                 if (dai == NULL) {
4044                         ret = -ENOMEM;
4045                         goto err;
4046                 }
4047 
4048                 /*
4049                  * Back in the old days when we still had component-less DAIs,
4050                  * instead of having a static name, component-less DAIs would
4051                  * inherit the name of the parent device so it is possible to
4052                  * register multiple instances of the DAI. We still need to keep
4053                  * the same naming style even though those DAIs are not
4054                  * component-less anymore.
4055                  */
4056                 if (count == 1 && legacy_dai_naming) {
4057                         dai->name = fmt_single_name(dev, &dai->id);
4058                 } else {
4059                         dai->name = fmt_multiple_name(dev, &dai_drv[i]);
4060                         if (dai_drv[i].id)
4061                                 dai->id = dai_drv[i].id;
4062                         else
4063                                 dai->id = i;
4064                 }
4065                 if (dai->name == NULL) {
4066                         kfree(dai);
4067                         ret = -ENOMEM;
4068                         goto err;
4069                 }
4070 
4071                 dai->component = component;
4072                 dai->dev = dev;
4073                 dai->driver = &dai_drv[i];
4074                 if (!dai->driver->ops)
4075                         dai->driver->ops = &null_dai_ops;
4076 
4077                 list_add(&dai->list, &component->dai_list);
4078 
4079                 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
4080         }
4081 
4082         return 0;
4083 
4084 err:
4085         snd_soc_unregister_dais(component);
4086 
4087         return ret;
4088 }
4089 
4090 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
4091         enum snd_soc_dapm_type type, int subseq)
4092 {
4093         struct snd_soc_component *component = dapm->component;
4094 
4095         component->driver->seq_notifier(component, type, subseq);
4096 }
4097 
4098 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
4099         int event)
4100 {
4101         struct snd_soc_component *component = dapm->component;
4102 
4103         return component->driver->stream_event(component, event);
4104 }
4105 
4106 static int snd_soc_component_initialize(struct snd_soc_component *component,
4107         const struct snd_soc_component_driver *driver, struct device *dev)
4108 {
4109         struct snd_soc_dapm_context *dapm;
4110 
4111         component->name = fmt_single_name(dev, &component->id);
4112         if (!component->name) {
4113                 dev_err(dev, "ASoC: Failed to allocate name\n");
4114                 return -ENOMEM;
4115         }
4116 
4117         component->dev = dev;
4118         component->driver = driver;
4119 
4120         if (!component->dapm_ptr)
4121                 component->dapm_ptr = &component->dapm;
4122 
4123         dapm = component->dapm_ptr;
4124         dapm->dev = dev;
4125         dapm->component = component;
4126         dapm->bias_level = SND_SOC_BIAS_OFF;
4127         if (driver->seq_notifier)
4128                 dapm->seq_notifier = snd_soc_component_seq_notifier;
4129         if (driver->stream_event)
4130                 dapm->stream_event = snd_soc_component_stream_event;
4131 
4132         INIT_LIST_HEAD(&component->dai_list);
4133         mutex_init(&component->io_mutex);
4134 
4135         return 0;
4136 }
4137 
4138 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
4139 {
4140         list_add(&component->list, &component_list);
4141 }
4142 
4143 static void snd_soc_component_add(struct snd_soc_component *component)
4144 {
4145         mutex_lock(&client_mutex);
4146         snd_soc_component_add_unlocked(component);
4147         mutex_unlock(&client_mutex);
4148 }
4149 
4150 static void snd_soc_component_cleanup(struct snd_soc_component *component)
4151 {
4152         snd_soc_unregister_dais(component);
4153         kfree(component->name);
4154 }
4155 
4156 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
4157 {
4158         list_del(&component->list);
4159 }
4160 
4161 static void snd_soc_component_del(struct snd_soc_component *component)
4162 {
4163         mutex_lock(&client_mutex);
4164         snd_soc_component_del_unlocked(component);
4165         mutex_unlock(&client_mutex);
4166 }
4167 
4168 int snd_soc_register_component(struct device *dev,
4169                                const struct snd_soc_component_driver *cmpnt_drv,
4170                                struct snd_soc_dai_driver *dai_drv,
4171                                int num_dai)
4172 {
4173         struct snd_soc_component *cmpnt;
4174         int ret;
4175 
4176         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
4177         if (!cmpnt) {
4178                 dev_err(dev, "ASoC: Failed to allocate memory\n");
4179                 return -ENOMEM;
4180         }
4181 
4182         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
4183         if (ret)
4184                 goto err_free;
4185 
4186         cmpnt->ignore_pmdown_time = true;
4187         cmpnt->registered_as_component = true;
4188 
4189         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
4190         if (ret < 0) {
4191                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4192                 goto err_cleanup;
4193         }
4194 
4195         snd_soc_component_add(cmpnt);
4196 
4197         return 0;
4198 
4199 err_cleanup:
4200         snd_soc_component_cleanup(cmpnt);
4201 err_free:
4202         kfree(cmpnt);
4203         return ret;
4204 }
4205 EXPORT_SYMBOL_GPL(snd_soc_register_component);
4206 
4207 /**
4208  * snd_soc_unregister_component - Unregister a component from the ASoC core
4209  *
4210  */
4211 void snd_soc_unregister_component(struct device *dev)
4212 {
4213         struct snd_soc_component *cmpnt;
4214 
4215         list_for_each_entry(cmpnt, &component_list, list) {
4216                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
4217                         goto found;
4218         }
4219         return;
4220 
4221 found:
4222         snd_soc_component_del(cmpnt);
4223         snd_soc_component_cleanup(cmpnt);
4224         kfree(cmpnt);
4225 }
4226 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
4227 
4228 static int snd_soc_platform_drv_write(struct snd_soc_component *component,
4229         unsigned int reg, unsigned int val)
4230 {
4231         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
4232 
4233         return platform->driver->write(platform, reg, val);
4234 }
4235 
4236 static int snd_soc_platform_drv_read(struct snd_soc_component *component,
4237         unsigned int reg, unsigned int *val)
4238 {
4239         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
4240 
4241         *val = platform->driver->read(platform, reg);
4242 
4243         return 0;
4244 }
4245 
4246 /**
4247  * snd_soc_add_platform - Add a platform to the ASoC core
4248  * @dev: The parent device for the platform
4249  * @platform: The platform to add
4250  * @platform_driver: The driver for the platform
4251  */
4252 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
4253                 const struct snd_soc_platform_driver *platform_drv)
4254 {
4255         int ret;
4256 
4257         ret = snd_soc_component_initialize(&platform->component,
4258                         &platform_drv->component_driver, dev);
4259         if (ret)
4260                 return ret;
4261 
4262         platform->dev = dev;
4263         platform->driver = platform_drv;
4264         if (platform_drv->write)
4265                 platform->component.write = snd_soc_platform_drv_write;
4266         if (platform_drv->read)
4267                 platform->component.read = snd_soc_platform_drv_read;
4268 
4269         mutex_lock(&client_mutex);
4270         snd_soc_component_add_unlocked(&platform->component);
4271         list_add(&platform->list, &platform_list);
4272         mutex_unlock(&client_mutex);
4273 
4274         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
4275                 platform->component.name);
4276 
4277         return 0;
4278 }
4279 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
4280 
4281 /**
4282  * snd_soc_register_platform - Register a platform with the ASoC core
4283  *
4284  * @platform: platform to register
4285  */
4286 int snd_soc_register_platform(struct device *dev,
4287                 const struct snd_soc_platform_driver *platform_drv)
4288 {
4289         struct snd_soc_platform *platform;
4290         int ret;
4291 
4292         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
4293 
4294         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
4295         if (platform == NULL)
4296                 return -ENOMEM;
4297 
4298         ret = snd_soc_add_platform(dev, platform, platform_drv);
4299         if (ret)
4300                 kfree(platform);
4301 
4302         return ret;
4303 }
4304 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
4305 
4306 /**
4307  * snd_soc_remove_platform - Remove a platform from the ASoC core
4308  * @platform: the platform to remove
4309  */
4310 void snd_soc_remove_platform(struct snd_soc_platform *platform)
4311 {
4312 
4313         mutex_lock(&client_mutex);
4314         list_del(&platform->list);
4315         snd_soc_component_del_unlocked(&platform->component);
4316         mutex_unlock(&client_mutex);
4317 
4318         snd_soc_component_cleanup(&platform->component);
4319 
4320         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
4321                 platform->component.name);
4322 }
4323 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
4324 
4325 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
4326 {
4327         struct snd_soc_platform *platform;
4328 
4329         list_for_each_entry(platform, &platform_list, list) {
4330                 if (dev == platform->dev)
4331                         return platform;
4332         }
4333 
4334         return NULL;
4335 }
4336 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
4337 
4338 /**
4339  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
4340  *
4341  * @platform: platform to unregister
4342  */
4343 void snd_soc_unregister_platform(struct device *dev)
4344 {
4345         struct snd_soc_platform *platform;
4346 
4347         platform = snd_soc_lookup_platform(dev);
4348         if (!platform)
4349                 return;
4350 
4351         snd_soc_remove_platform(platform);
4352         kfree(platform);
4353 }
4354 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
4355 
4356 static u64 codec_format_map[] = {
4357         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
4358         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
4359         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
4360         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
4361         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
4362         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
4363         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4364         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4365         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
4366         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
4367         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
4368         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
4369         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
4370         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
4371         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
4372         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
4373 };
4374 
4375 /* Fix up the DAI formats for endianness: codecs don't actually see
4376  * the endianness of the data but we're using the CPU format
4377  * definitions which do need to include endianness so we ensure that
4378  * codec DAIs always have both big and little endian variants set.
4379  */
4380 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
4381 {
4382         int i;
4383 
4384         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
4385                 if (stream->formats & codec_format_map[i])
4386                         stream->formats |= codec_format_map[i];
4387 }
4388 
4389 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
4390         unsigned int reg, unsigned int val)
4391 {
4392         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
4393 
4394         return codec->driver->write(codec, reg, val);
4395 }
4396 
4397 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
4398         unsigned int reg, unsigned int *val)
4399 {
4400         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
4401 
4402         *val = codec->driver->read(codec, reg);
4403 
4404         return 0;
4405 }
4406 
4407 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
4408         enum snd_soc_bias_level level)
4409 {
4410         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
4411 
4412         return codec->driver->set_bias_level(codec, level);
4413 }
4414 
4415 /**
4416  * snd_soc_register_codec - Register a codec with the ASoC core
4417  *
4418  * @codec: codec to register
4419  */
4420 int snd_soc_register_codec(struct device *dev,
4421                            const struct snd_soc_codec_driver *codec_drv,
4422                            struct snd_soc_dai_driver *dai_drv,
4423                            int num_dai)
4424 {
4425         struct snd_soc_codec *codec;
4426         struct snd_soc_dai *dai;
4427         struct regmap *regmap;
4428         int ret, i;
4429 
4430         dev_dbg(dev, "codec register %s\n", dev_name(dev));
4431 
4432         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
4433         if (codec == NULL)
4434                 return -ENOMEM;
4435 
4436         codec->component.dapm_ptr = &codec->dapm;
4437 
4438         ret = snd_soc_component_initialize(&codec->component,
4439                         &codec_drv->component_driver, dev);
4440         if (ret)
4441                 goto err_free;
4442 
4443         if (codec_drv->write)
4444                 codec->component.write = snd_soc_codec_drv_write;
4445         if (codec_drv->read)
4446                 codec->component.read = snd_soc_codec_drv_read;
4447         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
4448         codec->dapm.codec = codec;
4449         if (codec_drv->seq_notifier)
4450                 codec->dapm.seq_notifier = codec_drv->seq_notifier;
4451         if (codec_drv->set_bias_level)
4452                 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
4453         codec->dev = dev;
4454         codec->driver = codec_drv;
4455         codec->component.val_bytes = codec_drv->reg_word_size;
4456         mutex_init(&codec->mutex);
4457 
4458         if (!codec->component.write) {
4459                 if (codec_drv->get_regmap)
4460                         regmap = codec_drv->get_regmap(dev);
4461                 else
4462                         regmap = dev_get_regmap(dev, NULL);
4463 
4464                 if (regmap) {
4465                         ret = snd_soc_component_init_io(&codec->component,
4466                                 regmap);
4467                         if (ret) {
4468                                 dev_err(codec->dev,
4469                                                 "Failed to set cache I/O:%d\n",
4470                                                 ret);
4471                                 goto err_cleanup;
4472                         }
4473                 }
4474         }
4475 
4476         for (i = 0; i < num_dai; i++) {
4477                 fixup_codec_formats(&dai_drv[i].playback);
4478                 fixup_codec_formats(&dai_drv[i].capture);
4479         }
4480 
4481         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
4482         if (ret < 0) {
4483                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4484                 goto err_cleanup;
4485         }
4486 
4487         list_for_each_entry(dai, &codec->component.dai_list, list)
4488                 dai->codec = codec;
4489 
4490         mutex_lock(&client_mutex);
4491         snd_soc_component_add_unlocked(&codec->component);
4492         list_add(&codec->list, &codec_list);
4493         mutex_unlock(&client_mutex);
4494 
4495         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
4496                 codec->component.name);
4497         return 0;
4498 
4499 err_cleanup:
4500         snd_soc_component_cleanup(&codec->component);
4501 err_free:
4502         kfree(codec);
4503         return ret;
4504 }
4505 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4506 
4507 /**
4508  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4509  *
4510  * @codec: codec to unregister
4511  */
4512 void snd_soc_unregister_codec(struct device *dev)
4513 {
4514         struct snd_soc_codec *codec;
4515 
4516         list_for_each_entry(codec, &codec_list, list) {
4517                 if (dev == codec->dev)
4518                         goto found;
4519         }
4520         return;
4521 
4522 found:
4523 
4524         mutex_lock(&client_mutex);
4525         list_del(&codec->list);
4526         snd_soc_component_del_unlocked(&codec->component);
4527         mutex_unlock(&client_mutex);
4528 
4529         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
4530                         codec->component.name);
4531 
4532         snd_soc_component_cleanup(&codec->component);
4533         snd_soc_cache_exit(codec);
4534         kfree(codec);
4535 }
4536 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4537 
4538 /* Retrieve a card's name from device tree */
4539 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4540                                const char *propname)
4541 {
4542         struct device_node *np;
4543         int ret;
4544 
4545         if (!card->dev) {
4546                 pr_err("card->dev is not set before calling %s\n", __func__);
4547                 return -EINVAL;
4548         }
4549 
4550         np = card->dev->of_node;
4551 
4552         ret = of_property_read_string_index(np, propname, 0, &card->name);
4553         /*
4554          * EINVAL means the property does not exist. This is fine providing
4555          * card->name was previously set, which is checked later in
4556          * snd_soc_register_card.
4557          */
4558         if (ret < 0 && ret != -EINVAL) {
4559                 dev_err(card->dev,
4560                         "ASoC: Property '%s' could not be read: %d\n",
4561                         propname, ret);
4562                 return ret;
4563         }
4564 
4565         return 0;
4566 }
4567 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4568 
4569 static const struct snd_soc_dapm_widget simple_widgets[] = {
4570         SND_SOC_DAPM_MIC("Microphone", NULL),
4571         SND_SOC_DAPM_LINE("Line", NULL),
4572         SND_SOC_DAPM_HP("Headphone", NULL),
4573         SND_SOC_DAPM_SPK("Speaker", NULL),
4574 };
4575 
4576 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
4577                                           const char *propname)
4578 {
4579         struct device_node *np = card->dev->of_node;
4580         struct snd_soc_dapm_widget *widgets;
4581         const char *template, *wname;
4582         int i, j, num_widgets, ret;
4583 
4584         num_widgets = of_property_count_strings(np, propname);
4585         if (num_widgets < 0) {
4586                 dev_err(card->dev,
4587                         "ASoC: Property '%s' does not exist\n", propname);
4588                 return -EINVAL;
4589         }
4590         if (num_widgets & 1) {
4591                 dev_err(card->dev,
4592                         "ASoC: Property '%s' length is not even\n", propname);
4593                 return -EINVAL;
4594         }
4595 
4596         num_widgets /= 2;
4597         if (!num_widgets) {
4598                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4599                         propname);
4600                 return -EINVAL;
4601         }
4602 
4603         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
4604                                GFP_KERNEL);
4605         if (!widgets) {
4606                 dev_err(card->dev,
4607                         "ASoC: Could not allocate memory for widgets\n");
4608                 return -ENOMEM;
4609         }
4610 
4611         for (i = 0; i < num_widgets; i++) {
4612                 ret = of_property_read_string_index(np, propname,
4613                         2 * i, &template);
4614                 if (ret) {
4615                         dev_err(card->dev,
4616                                 "ASoC: Property '%s' index %d read error:%d\n",
4617                                 propname, 2 * i, ret);
4618                         return -EINVAL;
4619                 }
4620 
4621                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
4622                         if (!strncmp(template, simple_widgets[j].name,
4623                                      strlen(simple_widgets[j].name))) {
4624                                 widgets[i] = simple_widgets[j];
4625                                 break;
4626                         }
4627                 }
4628 
4629                 if (j >= ARRAY_SIZE(simple_widgets)) {
4630                         dev_err(card->dev,
4631                                 "ASoC: DAPM widget '%s' is not supported\n",
4632                                 template);
4633                         return -EINVAL;
4634                 }
4635 
4636                 ret = of_property_read_string_index(np, propname,
4637                                                     (2 * i) + 1,
4638                                                     &wname);
4639                 if (ret) {
4640                         dev_err(card->dev,
4641                                 "ASoC: Property '%s' index %d read error:%d\n",
4642                                 propname, (2 * i) + 1, ret);
4643                         return -EINVAL;
4644                 }
4645 
4646                 widgets[i].name = wname;
4647         }
4648 
4649         card->dapm_widgets = widgets;
4650         card->num_dapm_widgets = num_widgets;
4651 
4652         return 0;
4653 }
4654 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
4655 
4656 int snd_soc_of_parse_tdm_slot(struct device_node *np,
4657                               unsigned int *slots,
4658                               unsigned int *slot_width)
4659 {
4660         u32 val;
4661         int ret;
4662 
4663         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
4664                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
4665                 if (ret)
4666                         return ret;
4667 
4668                 if (slots)
4669                         *slots = val;
4670         }
4671 
4672         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
4673                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
4674                 if (ret)
4675                         return ret;
4676 
4677                 if (slot_width)
4678                         *slot_width = val;
4679         }
4680 
4681         return 0;
4682 }
4683 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
4684 
4685 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4686                                    const char *propname)
4687 {
4688         struct device_node *np = card->dev->of_node;
4689         int num_routes;
4690         struct snd_soc_dapm_route *routes;
4691         int i, ret;
4692 
4693         num_routes = of_property_count_strings(np, propname);
4694         if (num_routes < 0 || num_routes & 1) {
4695                 dev_err(card->dev,
4696                         "ASoC: Property '%s' does not exist or its length is not even\n",
4697                         propname);
4698                 return -EINVAL;
4699         }
4700         num_routes /= 2;
4701         if (!num_routes) {
4702                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4703                         propname);
4704                 return -EINVAL;
4705         }
4706 
4707         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4708                               GFP_KERNEL);
4709         if (!routes) {
4710                 dev_err(card->dev,
4711                         "ASoC: Could not allocate DAPM route table\n");
4712                 return -EINVAL;
4713         }
4714 
4715         for (i = 0; i < num_routes; i++) {
4716                 ret = of_property_read_string_index(np, propname,
4717                         2 * i, &routes[i].sink);
4718                 if (ret) {
4719                         dev_err(card->dev,
4720                                 "ASoC: Property '%s' index %d could not be read: %d\n",
4721                                 propname, 2 * i, ret);
4722                         return -EINVAL;
4723                 }
4724                 ret = of_property_read_string_index(np, propname,
4725                         (2 * i) + 1, &routes[i].source);
4726                 if (ret) {
4727                         dev_err(card->dev,
4728                                 "ASoC: Property '%s' index %d could not be read: %d\n",
4729                                 propname, (2 * i) + 1, ret);
4730                         return -EINVAL;
4731                 }
4732         }
4733 
4734         card->num_dapm_routes = num_routes;
4735         card->dapm_routes = routes;
4736 
4737         return 0;
4738 }
4739 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4740 
4741 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4742                                      const char *prefix,
4743                                      struct device_node **bitclkmaster,
4744                                      struct device_node **framemaster)
4745 {
4746         int ret, i;
4747         char prop[128];
4748         unsigned int format = 0;
4749         int bit, frame;
4750         const char *str;
4751         struct {
4752                 char *name;
4753                 unsigned int val;
4754         } of_fmt_table[] = {
4755                 { "i2s",        SND_SOC_DAIFMT_I2S },
4756                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
4757                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
4758                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
4759                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
4760                 { "ac97",       SND_SOC_DAIFMT_AC97 },
4761                 { "pdm",        SND_SOC_DAIFMT_PDM},
4762                 { "msb",        SND_SOC_DAIFMT_MSB },
4763                 { "lsb",        SND_SOC_DAIFMT_LSB },
4764         };
4765 
4766         if (!prefix)
4767                 prefix = "";
4768 
4769         /*
4770          * check "[prefix]format = xxx"
4771          * SND_SOC_DAIFMT_FORMAT_MASK area
4772          */
4773         snprintf(prop, sizeof(prop), "%sformat", prefix);
4774         ret = of_property_read_string(np, prop, &str);
4775         if (ret == 0) {
4776                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4777                         if (strcmp(str, of_fmt_table[i].name) == 0) {
4778                                 format |= of_fmt_table[i].val;
4779                                 break;
4780                         }
4781                 }
4782         }
4783 
4784         /*
4785          * check "[prefix]continuous-clock"
4786          * SND_SOC_DAIFMT_CLOCK_MASK area
4787          */
4788         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4789         if (of_get_property(np, prop, NULL))
4790                 format |= SND_SOC_DAIFMT_CONT;
4791         else
4792                 format |= SND_SOC_DAIFMT_GATED;
4793 
4794         /*
4795          * check "[prefix]bitclock-inversion"
4796          * check "[prefix]frame-inversion"
4797          * SND_SOC_DAIFMT_INV_MASK area
4798          */
4799         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4800         bit = !!of_get_property(np, prop, NULL);
4801 
4802         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4803         frame = !!of_get_property(np, prop, NULL);
4804 
4805         switch ((bit << 4) + frame) {
4806         case 0x11:
4807                 format |= SND_SOC_DAIFMT_IB_IF;
4808                 break;
4809         case 0x10:
4810                 format |= SND_SOC_DAIFMT_IB_NF;
4811                 break;
4812         case 0x01:
4813                 format |= SND_SOC_DAIFMT_NB_IF;
4814                 break;
4815         default:
4816                 /* SND_SOC_DAIFMT_NB_NF is default */
4817                 break;
4818         }
4819 
4820         /*
4821          * check "[prefix]bitclock-master"
4822          * check "[prefix]frame-master"
4823          * SND_SOC_DAIFMT_MASTER_MASK area
4824          */
4825         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4826         bit = !!of_get_property(np, prop, NULL);
4827         if (bit && bitclkmaster)
4828                 *bitclkmaster = of_parse_phandle(np, prop, 0);
4829 
4830         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4831         frame = !!of_get_property(np, prop, NULL);
4832         if (frame && framemaster)
4833                 *framemaster = of_parse_phandle(np, prop, 0);
4834 
4835         switch ((bit << 4) + frame) {
4836         case 0x11:
4837                 format |= SND_SOC_DAIFMT_CBM_CFM;
4838                 break;
4839         case 0x10:
4840                 format |= SND_SOC_DAIFMT_CBM_CFS;
4841                 break;
4842         case 0x01:
4843                 format |= SND_SOC_DAIFMT_CBS_CFM;
4844                 break;
4845         default:
4846                 format |= SND_SOC_DAIFMT_CBS_CFS;
4847                 break;
4848         }
4849 
4850         return format;
4851 }
4852 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4853 
4854 int snd_soc_of_get_dai_name(struct device_node *of_node,
4855                             const char **dai_name)
4856 {
4857         struct snd_soc_component *pos;
4858         struct of_phandle_args args;
4859         int ret;
4860 
4861         ret = of_parse_phandle_with_args(of_node, "sound-dai",
4862                                          "#sound-dai-cells", 0, &args);
4863         if (ret)
4864                 return ret;
4865 
4866         ret = -EPROBE_DEFER;
4867 
4868         mutex_lock(&client_mutex);
4869         list_for_each_entry(pos, &component_list, list) {
4870                 if (pos->dev->of_node != args.np)
4871                         continue;
4872 
4873                 if (pos->driver->of_xlate_dai_name) {
4874                         ret = pos->driver->of_xlate_dai_name(pos, &args, dai_name);
4875                 } else {
4876                         int id = -1;
4877 
4878                         switch (args.args_count) {
4879                         case 0:
4880                                 id = 0; /* same as dai_drv[0] */
4881                                 break;
4882                         case 1:
4883                                 id = args.args[0];
4884                                 break;
4885                         default:
4886                                 /* not supported */
4887                                 break;
4888                         }
4889 
4890                         if (id < 0 || id >= pos->num_dai) {
4891                                 ret = -EINVAL;
4892                                 continue;
4893                         }
4894 
4895                         ret = 0;
4896 
4897                         *dai_name = pos->dai_drv[id].name;
4898                         if (!*dai_name)
4899                                 *dai_name = pos->name;
4900                 }
4901 
4902                 break;
4903         }
4904         mutex_unlock(&client_mutex);
4905 
4906         of_node_put(args.np);
4907 
4908         return ret;
4909 }
4910 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4911 
4912 static int __init snd_soc_init(void)
4913 {
4914 #ifdef CONFIG_DEBUG_FS
4915         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4916         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4917                 pr_warn("ASoC: Failed to create debugfs directory\n");
4918                 snd_soc_debugfs_root = NULL;
4919         }
4920 
4921         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4922                                  &codec_list_fops))
4923                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4924 
4925         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4926                                  &dai_list_fops))
4927                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4928 
4929         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4930                                  &platform_list_fops))
4931                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
4932 #endif
4933 
4934         snd_soc_util_init();
4935 
4936         return platform_driver_register(&soc_driver);
4937 }
4938 module_init(snd_soc_init);
4939 
4940 static void __exit snd_soc_exit(void)
4941 {
4942         snd_soc_util_exit();
4943 
4944 #ifdef CONFIG_DEBUG_FS
4945         debugfs_remove_recursive(snd_soc_debugfs_root);
4946 #endif
4947         platform_driver_unregister(&soc_driver);
4948 }
4949 module_exit(snd_soc_exit);
4950 
4951 /* Module information */
4952 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4953 MODULE_DESCRIPTION("ALSA SoC Core");
4954 MODULE_LICENSE("GPL");
4955 MODULE_ALIAS("platform:soc-audio");
4956 

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