Version:  2.0.40 2.2.26 2.4.37 3.0 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

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

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