ASoC: core: Don't schedule deferred_resume_work twice
[linux-2.6.git] / 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/slab.h>
34 #include <sound/ac97_codec.h>
35 #include <sound/core.h>
36 #include <sound/jack.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/initval.h>
41
42 #define CREATE_TRACE_POINTS
43 #include <trace/events/asoc.h>
44
45 #define NAME_SIZE       32
46
47 static DEFINE_MUTEX(pcm_mutex);
48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
49
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 #endif
54
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(card_list);
57 static LIST_HEAD(dai_list);
58 static LIST_HEAD(platform_list);
59 static LIST_HEAD(codec_list);
60
61 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
62
63 /*
64  * This is a timeout to do a DAPM powerdown after a stream is closed().
65  * It can be used to eliminate pops between different playback streams, e.g.
66  * between two audio tracks.
67  */
68 static int pmdown_time = 5000;
69 module_param(pmdown_time, int, 0);
70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72 /* returns the minimum number of bytes needed to represent
73  * a particular given value */
74 static int min_bytes_needed(unsigned long val)
75 {
76         int c = 0;
77         int i;
78
79         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80                 if (val & (1UL << i))
81                         break;
82         c = (sizeof val * 8) - c;
83         if (!c || (c % 8))
84                 c = (c + 8) / 8;
85         else
86                 c /= 8;
87         return c;
88 }
89
90 /* fill buf which is 'len' bytes with a formatted
91  * string of the form 'reg: value\n' */
92 static int format_register_str(struct snd_soc_codec *codec,
93                                unsigned int reg, char *buf, size_t len)
94 {
95         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96         int regsize = codec->driver->reg_word_size * 2;
97         int ret;
98         char tmpbuf[len + 1];
99         char regbuf[regsize + 1];
100
101         /* since tmpbuf is allocated on the stack, warn the callers if they
102          * try to abuse this function */
103         WARN_ON(len > 63);
104
105         /* +2 for ': ' and + 1 for '\n' */
106         if (wordsize + regsize + 2 + 1 != len)
107                 return -EINVAL;
108
109         ret = snd_soc_read(codec , reg);
110         if (ret < 0) {
111                 memset(regbuf, 'X', regsize);
112                 regbuf[regsize] = '\0';
113         } else {
114                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
115         }
116
117         /* prepare the buffer */
118         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119         /* copy it back to the caller without the '\0' */
120         memcpy(buf, tmpbuf, len);
121
122         return 0;
123 }
124
125 /* codec register dump */
126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127                                   size_t count, loff_t pos)
128 {
129         int i, step = 1;
130         int wordsize, regsize;
131         int len;
132         size_t total = 0;
133         loff_t p = 0;
134
135         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136         regsize = codec->driver->reg_word_size * 2;
137
138         len = wordsize + regsize + 2 + 1;
139
140         if (!codec->driver->reg_cache_size)
141                 return 0;
142
143         if (codec->driver->reg_cache_step)
144                 step = codec->driver->reg_cache_step;
145
146         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147                 if (codec->readable_register && !codec->readable_register(codec, i))
148                         continue;
149                 if (codec->driver->display_register) {
150                         count += codec->driver->display_register(codec, buf + count,
151                                                          PAGE_SIZE - count, i);
152                 } else {
153                         /* only support larger than PAGE_SIZE bytes debugfs
154                          * entries for the default case */
155                         if (p >= pos) {
156                                 if (total + len >= count - 1)
157                                         break;
158                                 format_register_str(codec, i, buf + total, len);
159                                 total += len;
160                         }
161                         p += len;
162                 }
163         }
164
165         total = min(total, count - 1);
166
167         return total;
168 }
169
170 static ssize_t codec_reg_show(struct device *dev,
171         struct device_attribute *attr, char *buf)
172 {
173         struct snd_soc_pcm_runtime *rtd =
174                         container_of(dev, struct snd_soc_pcm_runtime, dev);
175
176         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177 }
178
179 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
180
181 static ssize_t pmdown_time_show(struct device *dev,
182                                 struct device_attribute *attr, char *buf)
183 {
184         struct snd_soc_pcm_runtime *rtd =
185                         container_of(dev, struct snd_soc_pcm_runtime, dev);
186
187         return sprintf(buf, "%ld\n", rtd->pmdown_time);
188 }
189
190 static ssize_t pmdown_time_set(struct device *dev,
191                                struct device_attribute *attr,
192                                const char *buf, size_t count)
193 {
194         struct snd_soc_pcm_runtime *rtd =
195                         container_of(dev, struct snd_soc_pcm_runtime, dev);
196         int ret;
197
198         ret = strict_strtol(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 int codec_reg_open_file(struct inode *inode, struct file *file)
209 {
210         file->private_data = inode->i_private;
211         return 0;
212 }
213
214 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215                                    size_t count, loff_t *ppos)
216 {
217         ssize_t ret;
218         struct snd_soc_codec *codec = file->private_data;
219         char *buf;
220
221         if (*ppos < 0 || !count)
222                 return -EINVAL;
223
224         buf = kmalloc(count, GFP_KERNEL);
225         if (!buf)
226                 return -ENOMEM;
227
228         ret = soc_codec_reg_show(codec, buf, count, *ppos);
229         if (ret >= 0) {
230                 if (copy_to_user(user_buf, buf, ret)) {
231                         kfree(buf);
232                         return -EFAULT;
233                 }
234                 *ppos += ret;
235         }
236
237         kfree(buf);
238         return ret;
239 }
240
241 static ssize_t codec_reg_write_file(struct file *file,
242                 const char __user *user_buf, size_t count, loff_t *ppos)
243 {
244         char buf[32];
245         int buf_size;
246         char *start = buf;
247         unsigned long reg, value;
248         int step = 1;
249         struct snd_soc_codec *codec = file->private_data;
250
251         buf_size = min(count, (sizeof(buf)-1));
252         if (copy_from_user(buf, user_buf, buf_size))
253                 return -EFAULT;
254         buf[buf_size] = 0;
255
256         if (codec->driver->reg_cache_step)
257                 step = codec->driver->reg_cache_step;
258
259         while (*start == ' ')
260                 start++;
261         reg = simple_strtoul(start, &start, 16);
262         while (*start == ' ')
263                 start++;
264         if (strict_strtoul(start, 16, &value))
265                 return -EINVAL;
266
267         /* Userspace has been fiddling around behind the kernel's back */
268         add_taint(TAINT_USER);
269
270         snd_soc_write(codec, reg, value);
271         return buf_size;
272 }
273
274 static const struct file_operations codec_reg_fops = {
275         .open = codec_reg_open_file,
276         .read = codec_reg_read_file,
277         .write = codec_reg_write_file,
278         .llseek = default_llseek,
279 };
280
281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282 {
283         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284
285         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286                                                        debugfs_card_root);
287         if (!codec->debugfs_codec_root) {
288                 printk(KERN_WARNING
289                        "ASoC: Failed to create codec debugfs directory\n");
290                 return;
291         }
292
293         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294                             &codec->cache_sync);
295         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
296                             &codec->cache_only);
297
298         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299                                                  codec->debugfs_codec_root,
300                                                  codec, &codec_reg_fops);
301         if (!codec->debugfs_reg)
302                 printk(KERN_WARNING
303                        "ASoC: Failed to create codec register debugfs file\n");
304
305         snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
306 }
307
308 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309 {
310         debugfs_remove_recursive(codec->debugfs_codec_root);
311 }
312
313 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
314                                     size_t count, loff_t *ppos)
315 {
316         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
317         ssize_t len, ret = 0;
318         struct snd_soc_codec *codec;
319
320         if (!buf)
321                 return -ENOMEM;
322
323         list_for_each_entry(codec, &codec_list, list) {
324                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
325                                codec->name);
326                 if (len >= 0)
327                         ret += len;
328                 if (ret > PAGE_SIZE) {
329                         ret = PAGE_SIZE;
330                         break;
331                 }
332         }
333
334         if (ret >= 0)
335                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
336
337         kfree(buf);
338
339         return ret;
340 }
341
342 static const struct file_operations codec_list_fops = {
343         .read = codec_list_read_file,
344         .llseek = default_llseek,/* read accesses f_pos */
345 };
346
347 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
348                                   size_t count, loff_t *ppos)
349 {
350         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
351         ssize_t len, ret = 0;
352         struct snd_soc_dai *dai;
353
354         if (!buf)
355                 return -ENOMEM;
356
357         list_for_each_entry(dai, &dai_list, list) {
358                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
359                 if (len >= 0)
360                         ret += len;
361                 if (ret > PAGE_SIZE) {
362                         ret = PAGE_SIZE;
363                         break;
364                 }
365         }
366
367         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
368
369         kfree(buf);
370
371         return ret;
372 }
373
374 static const struct file_operations dai_list_fops = {
375         .read = dai_list_read_file,
376         .llseek = default_llseek,/* read accesses f_pos */
377 };
378
379 static ssize_t platform_list_read_file(struct file *file,
380                                        char __user *user_buf,
381                                        size_t count, loff_t *ppos)
382 {
383         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
384         ssize_t len, ret = 0;
385         struct snd_soc_platform *platform;
386
387         if (!buf)
388                 return -ENOMEM;
389
390         list_for_each_entry(platform, &platform_list, list) {
391                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
392                                platform->name);
393                 if (len >= 0)
394                         ret += len;
395                 if (ret > PAGE_SIZE) {
396                         ret = PAGE_SIZE;
397                         break;
398                 }
399         }
400
401         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403         kfree(buf);
404
405         return ret;
406 }
407
408 static const struct file_operations platform_list_fops = {
409         .read = platform_list_read_file,
410         .llseek = default_llseek,/* read accesses f_pos */
411 };
412
413 static void soc_init_card_debugfs(struct snd_soc_card *card)
414 {
415         card->debugfs_card_root = debugfs_create_dir(card->name,
416                                                      snd_soc_debugfs_root);
417         if (!card->debugfs_card_root) {
418                 dev_warn(card->dev,
419                          "ASoC: Failed to create codec debugfs directory\n");
420                 return;
421         }
422
423         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
424                                                     card->debugfs_card_root,
425                                                     &card->pop_time);
426         if (!card->debugfs_pop_time)
427                 dev_warn(card->dev,
428                        "Failed to create pop time debugfs file\n");
429 }
430
431 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
432 {
433         debugfs_remove_recursive(card->debugfs_card_root);
434 }
435
436 #else
437
438 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
439 {
440 }
441
442 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
443 {
444 }
445
446 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
447 {
448 }
449
450 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
451 {
452 }
453 #endif
454
455 #ifdef CONFIG_SND_SOC_AC97_BUS
456 /* unregister ac97 codec */
457 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
458 {
459         if (codec->ac97->dev.bus)
460                 device_unregister(&codec->ac97->dev);
461         return 0;
462 }
463
464 /* stop no dev release warning */
465 static void soc_ac97_device_release(struct device *dev){}
466
467 /* register ac97 codec to bus */
468 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
469 {
470         int err;
471
472         codec->ac97->dev.bus = &ac97_bus_type;
473         codec->ac97->dev.parent = codec->card->dev;
474         codec->ac97->dev.release = soc_ac97_device_release;
475
476         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
477                      codec->card->snd_card->number, 0, codec->name);
478         err = device_register(&codec->ac97->dev);
479         if (err < 0) {
480                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
481                 codec->ac97->dev.bus = NULL;
482                 return err;
483         }
484         return 0;
485 }
486 #endif
487
488 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
489 {
490         struct snd_soc_pcm_runtime *rtd = substream->private_data;
491         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
492         struct snd_soc_dai *codec_dai = rtd->codec_dai;
493         int ret;
494
495         if (!codec_dai->driver->symmetric_rates &&
496             !cpu_dai->driver->symmetric_rates &&
497             !rtd->dai_link->symmetric_rates)
498                 return 0;
499
500         /* This can happen if multiple streams are starting simultaneously -
501          * the second can need to get its constraints before the first has
502          * picked a rate.  Complain and allow the application to carry on.
503          */
504         if (!rtd->rate) {
505                 dev_warn(&rtd->dev,
506                          "Not enforcing symmetric_rates due to race\n");
507                 return 0;
508         }
509
510         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
511
512         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
513                                            SNDRV_PCM_HW_PARAM_RATE,
514                                            rtd->rate, rtd->rate);
515         if (ret < 0) {
516                 dev_err(&rtd->dev,
517                         "Unable to apply rate symmetry constraint: %d\n", ret);
518                 return ret;
519         }
520
521         return 0;
522 }
523
524 /*
525  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
526  * then initialized and any private data can be allocated. This also calls
527  * startup for the cpu DAI, platform, machine and codec DAI.
528  */
529 static int soc_pcm_open(struct snd_pcm_substream *substream)
530 {
531         struct snd_soc_pcm_runtime *rtd = substream->private_data;
532         struct snd_pcm_runtime *runtime = substream->runtime;
533         struct snd_soc_platform *platform = rtd->platform;
534         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
535         struct snd_soc_dai *codec_dai = rtd->codec_dai;
536         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
537         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
538         int ret = 0;
539
540         mutex_lock(&pcm_mutex);
541
542         /* startup the audio subsystem */
543         if (cpu_dai->driver->ops->startup) {
544                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
545                 if (ret < 0) {
546                         printk(KERN_ERR "asoc: can't open interface %s\n",
547                                 cpu_dai->name);
548                         goto out;
549                 }
550         }
551
552         if (platform->driver->ops && platform->driver->ops->open) {
553                 ret = platform->driver->ops->open(substream);
554                 if (ret < 0) {
555                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
556                         goto platform_err;
557                 }
558         }
559
560         if (codec_dai->driver->ops->startup) {
561                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
562                 if (ret < 0) {
563                         printk(KERN_ERR "asoc: can't open codec %s\n",
564                                 codec_dai->name);
565                         goto codec_dai_err;
566                 }
567         }
568
569         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
570                 ret = rtd->dai_link->ops->startup(substream);
571                 if (ret < 0) {
572                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
573                         goto machine_err;
574                 }
575         }
576
577         /* Check that the codec and cpu DAIs are compatible */
578         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
579                 runtime->hw.rate_min =
580                         max(codec_dai_drv->playback.rate_min,
581                             cpu_dai_drv->playback.rate_min);
582                 runtime->hw.rate_max =
583                         min(codec_dai_drv->playback.rate_max,
584                             cpu_dai_drv->playback.rate_max);
585                 runtime->hw.channels_min =
586                         max(codec_dai_drv->playback.channels_min,
587                                 cpu_dai_drv->playback.channels_min);
588                 runtime->hw.channels_max =
589                         min(codec_dai_drv->playback.channels_max,
590                                 cpu_dai_drv->playback.channels_max);
591                 runtime->hw.formats =
592                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
593                 runtime->hw.rates =
594                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
595                 if (codec_dai_drv->playback.rates
596                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
597                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
598                 if (cpu_dai_drv->playback.rates
599                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
600                         runtime->hw.rates |= codec_dai_drv->playback.rates;
601         } else {
602                 runtime->hw.rate_min =
603                         max(codec_dai_drv->capture.rate_min,
604                             cpu_dai_drv->capture.rate_min);
605                 runtime->hw.rate_max =
606                         min(codec_dai_drv->capture.rate_max,
607                             cpu_dai_drv->capture.rate_max);
608                 runtime->hw.channels_min =
609                         max(codec_dai_drv->capture.channels_min,
610                                 cpu_dai_drv->capture.channels_min);
611                 runtime->hw.channels_max =
612                         min(codec_dai_drv->capture.channels_max,
613                                 cpu_dai_drv->capture.channels_max);
614                 runtime->hw.formats =
615                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
616                 runtime->hw.rates =
617                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
618                 if (codec_dai_drv->capture.rates
619                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
620                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
621                 if (cpu_dai_drv->capture.rates
622                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
623                         runtime->hw.rates |= codec_dai_drv->capture.rates;
624         }
625
626         ret = -EINVAL;
627         snd_pcm_limit_hw_rates(runtime);
628         if (!runtime->hw.rates) {
629                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
630                         codec_dai->name, cpu_dai->name);
631                 goto config_err;
632         }
633         if (!runtime->hw.formats) {
634                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
635                         codec_dai->name, cpu_dai->name);
636                 goto config_err;
637         }
638         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
639             runtime->hw.channels_min > runtime->hw.channels_max) {
640                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
641                                 codec_dai->name, cpu_dai->name);
642                 goto config_err;
643         }
644
645         /* Symmetry only applies if we've already got an active stream. */
646         if (cpu_dai->active || codec_dai->active) {
647                 ret = soc_pcm_apply_symmetry(substream);
648                 if (ret != 0)
649                         goto config_err;
650         }
651
652         pr_debug("asoc: %s <-> %s info:\n",
653                         codec_dai->name, cpu_dai->name);
654         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
655         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
656                  runtime->hw.channels_max);
657         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
658                  runtime->hw.rate_max);
659
660         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
661                 cpu_dai->playback_active++;
662                 codec_dai->playback_active++;
663         } else {
664                 cpu_dai->capture_active++;
665                 codec_dai->capture_active++;
666         }
667         cpu_dai->active++;
668         codec_dai->active++;
669         rtd->codec->active++;
670         mutex_unlock(&pcm_mutex);
671         return 0;
672
673 config_err:
674         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
675                 rtd->dai_link->ops->shutdown(substream);
676
677 machine_err:
678         if (codec_dai->driver->ops->shutdown)
679                 codec_dai->driver->ops->shutdown(substream, codec_dai);
680
681 codec_dai_err:
682         if (platform->driver->ops && platform->driver->ops->close)
683                 platform->driver->ops->close(substream);
684
685 platform_err:
686         if (cpu_dai->driver->ops->shutdown)
687                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
688 out:
689         mutex_unlock(&pcm_mutex);
690         return ret;
691 }
692
693 /*
694  * Power down the audio subsystem pmdown_time msecs after close is called.
695  * This is to ensure there are no pops or clicks in between any music tracks
696  * due to DAPM power cycling.
697  */
698 static void close_delayed_work(struct work_struct *work)
699 {
700         struct snd_soc_pcm_runtime *rtd =
701                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
702         struct snd_soc_dai *codec_dai = rtd->codec_dai;
703
704         mutex_lock(&pcm_mutex);
705
706         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
707                  codec_dai->driver->playback.stream_name,
708                  codec_dai->playback_active ? "active" : "inactive",
709                  codec_dai->pop_wait ? "yes" : "no");
710
711         /* are we waiting on this codec DAI stream */
712         if (codec_dai->pop_wait == 1) {
713                 codec_dai->pop_wait = 0;
714                 snd_soc_dapm_stream_event(rtd,
715                         codec_dai->driver->playback.stream_name,
716                         SND_SOC_DAPM_STREAM_STOP);
717         }
718
719         mutex_unlock(&pcm_mutex);
720 }
721
722 /*
723  * Called by ALSA when a PCM substream is closed. Private data can be
724  * freed here. The cpu DAI, codec DAI, machine and platform are also
725  * shutdown.
726  */
727 static int soc_codec_close(struct snd_pcm_substream *substream)
728 {
729         struct snd_soc_pcm_runtime *rtd = substream->private_data;
730         struct snd_soc_platform *platform = rtd->platform;
731         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
732         struct snd_soc_dai *codec_dai = rtd->codec_dai;
733         struct snd_soc_codec *codec = rtd->codec;
734
735         mutex_lock(&pcm_mutex);
736
737         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
738                 cpu_dai->playback_active--;
739                 codec_dai->playback_active--;
740         } else {
741                 cpu_dai->capture_active--;
742                 codec_dai->capture_active--;
743         }
744
745         cpu_dai->active--;
746         codec_dai->active--;
747         codec->active--;
748
749         /* Muting the DAC suppresses artifacts caused during digital
750          * shutdown, for example from stopping clocks.
751          */
752         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
753                 snd_soc_dai_digital_mute(codec_dai, 1);
754
755         if (cpu_dai->driver->ops->shutdown)
756                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
757
758         if (codec_dai->driver->ops->shutdown)
759                 codec_dai->driver->ops->shutdown(substream, codec_dai);
760
761         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
762                 rtd->dai_link->ops->shutdown(substream);
763
764         if (platform->driver->ops && platform->driver->ops->close)
765                 platform->driver->ops->close(substream);
766         cpu_dai->runtime = NULL;
767
768         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
769                 /* start delayed pop wq here for playback streams */
770                 codec_dai->pop_wait = 1;
771                 schedule_delayed_work(&rtd->delayed_work,
772                         msecs_to_jiffies(rtd->pmdown_time));
773         } else {
774                 /* capture streams can be powered down now */
775                 snd_soc_dapm_stream_event(rtd,
776                         codec_dai->driver->capture.stream_name,
777                         SND_SOC_DAPM_STREAM_STOP);
778         }
779
780         mutex_unlock(&pcm_mutex);
781         return 0;
782 }
783
784 /*
785  * Called by ALSA when the PCM substream is prepared, can set format, sample
786  * rate, etc.  This function is non atomic and can be called multiple times,
787  * it can refer to the runtime info.
788  */
789 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
790 {
791         struct snd_soc_pcm_runtime *rtd = substream->private_data;
792         struct snd_soc_platform *platform = rtd->platform;
793         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
794         struct snd_soc_dai *codec_dai = rtd->codec_dai;
795         int ret = 0;
796
797         mutex_lock(&pcm_mutex);
798
799         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
800                 ret = rtd->dai_link->ops->prepare(substream);
801                 if (ret < 0) {
802                         printk(KERN_ERR "asoc: machine prepare error\n");
803                         goto out;
804                 }
805         }
806
807         if (platform->driver->ops && platform->driver->ops->prepare) {
808                 ret = platform->driver->ops->prepare(substream);
809                 if (ret < 0) {
810                         printk(KERN_ERR "asoc: platform prepare error\n");
811                         goto out;
812                 }
813         }
814
815         if (codec_dai->driver->ops->prepare) {
816                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
817                 if (ret < 0) {
818                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
819                         goto out;
820                 }
821         }
822
823         if (cpu_dai->driver->ops->prepare) {
824                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
825                 if (ret < 0) {
826                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
827                         goto out;
828                 }
829         }
830
831         /* cancel any delayed stream shutdown that is pending */
832         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
833             codec_dai->pop_wait) {
834                 codec_dai->pop_wait = 0;
835                 cancel_delayed_work(&rtd->delayed_work);
836         }
837
838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
839                 snd_soc_dapm_stream_event(rtd,
840                                           codec_dai->driver->playback.stream_name,
841                                           SND_SOC_DAPM_STREAM_START);
842         else
843                 snd_soc_dapm_stream_event(rtd,
844                                           codec_dai->driver->capture.stream_name,
845                                           SND_SOC_DAPM_STREAM_START);
846
847         snd_soc_dai_digital_mute(codec_dai, 0);
848
849 out:
850         mutex_unlock(&pcm_mutex);
851         return ret;
852 }
853
854 /*
855  * Called by ALSA when the hardware params are set by application. This
856  * function can also be called multiple times and can allocate buffers
857  * (using snd_pcm_lib_* ). It's non-atomic.
858  */
859 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
860                                 struct snd_pcm_hw_params *params)
861 {
862         struct snd_soc_pcm_runtime *rtd = substream->private_data;
863         struct snd_soc_platform *platform = rtd->platform;
864         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
865         struct snd_soc_dai *codec_dai = rtd->codec_dai;
866         int ret = 0;
867
868         mutex_lock(&pcm_mutex);
869
870         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
871                 ret = rtd->dai_link->ops->hw_params(substream, params);
872                 if (ret < 0) {
873                         printk(KERN_ERR "asoc: machine hw_params failed\n");
874                         goto out;
875                 }
876         }
877
878         if (codec_dai->driver->ops->hw_params) {
879                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
880                 if (ret < 0) {
881                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
882                                 codec_dai->name);
883                         goto codec_err;
884                 }
885         }
886
887         if (cpu_dai->driver->ops->hw_params) {
888                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
889                 if (ret < 0) {
890                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
891                                 cpu_dai->name);
892                         goto interface_err;
893                 }
894         }
895
896         if (platform->driver->ops && platform->driver->ops->hw_params) {
897                 ret = platform->driver->ops->hw_params(substream, params);
898                 if (ret < 0) {
899                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
900                                 platform->name);
901                         goto platform_err;
902                 }
903         }
904
905         rtd->rate = params_rate(params);
906
907 out:
908         mutex_unlock(&pcm_mutex);
909         return ret;
910
911 platform_err:
912         if (cpu_dai->driver->ops->hw_free)
913                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
914
915 interface_err:
916         if (codec_dai->driver->ops->hw_free)
917                 codec_dai->driver->ops->hw_free(substream, codec_dai);
918
919 codec_err:
920         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
921                 rtd->dai_link->ops->hw_free(substream);
922
923         mutex_unlock(&pcm_mutex);
924         return ret;
925 }
926
927 /*
928  * Frees resources allocated by hw_params, can be called multiple times
929  */
930 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
931 {
932         struct snd_soc_pcm_runtime *rtd = substream->private_data;
933         struct snd_soc_platform *platform = rtd->platform;
934         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
935         struct snd_soc_dai *codec_dai = rtd->codec_dai;
936         struct snd_soc_codec *codec = rtd->codec;
937
938         mutex_lock(&pcm_mutex);
939
940         /* apply codec digital mute */
941         if (!codec->active)
942                 snd_soc_dai_digital_mute(codec_dai, 1);
943
944         /* free any machine hw params */
945         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
946                 rtd->dai_link->ops->hw_free(substream);
947
948         /* free any DMA resources */
949         if (platform->driver->ops && platform->driver->ops->hw_free)
950                 platform->driver->ops->hw_free(substream);
951
952         /* now free hw params for the DAIs  */
953         if (codec_dai->driver->ops->hw_free)
954                 codec_dai->driver->ops->hw_free(substream, codec_dai);
955
956         if (cpu_dai->driver->ops->hw_free)
957                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
958
959         mutex_unlock(&pcm_mutex);
960         return 0;
961 }
962
963 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
964 {
965         struct snd_soc_pcm_runtime *rtd = substream->private_data;
966         struct snd_soc_platform *platform = rtd->platform;
967         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
968         struct snd_soc_dai *codec_dai = rtd->codec_dai;
969         int ret;
970
971         if (codec_dai->driver->ops->trigger) {
972                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
973                 if (ret < 0)
974                         return ret;
975         }
976
977         if (platform->driver->ops && platform->driver->ops->trigger) {
978                 ret = platform->driver->ops->trigger(substream, cmd);
979                 if (ret < 0)
980                         return ret;
981         }
982
983         if (cpu_dai->driver->ops->trigger) {
984                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
985                 if (ret < 0)
986                         return ret;
987         }
988         return 0;
989 }
990
991 /*
992  * soc level wrapper for pointer callback
993  * If cpu_dai, codec_dai, platform driver has the delay callback, than
994  * the runtime->delay will be updated accordingly.
995  */
996 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
997 {
998         struct snd_soc_pcm_runtime *rtd = substream->private_data;
999         struct snd_soc_platform *platform = rtd->platform;
1000         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1002         struct snd_pcm_runtime *runtime = substream->runtime;
1003         snd_pcm_uframes_t offset = 0;
1004         snd_pcm_sframes_t delay = 0;
1005
1006         if (platform->driver->ops && platform->driver->ops->pointer)
1007                 offset = platform->driver->ops->pointer(substream);
1008
1009         if (cpu_dai->driver->ops->delay)
1010                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1011
1012         if (codec_dai->driver->ops->delay)
1013                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1014
1015         if (platform->driver->delay)
1016                 delay += platform->driver->delay(substream, codec_dai);
1017
1018         runtime->delay = delay;
1019
1020         return offset;
1021 }
1022
1023 /* ASoC PCM operations */
1024 static struct snd_pcm_ops soc_pcm_ops = {
1025         .open           = soc_pcm_open,
1026         .close          = soc_codec_close,
1027         .hw_params      = soc_pcm_hw_params,
1028         .hw_free        = soc_pcm_hw_free,
1029         .prepare        = soc_pcm_prepare,
1030         .trigger        = soc_pcm_trigger,
1031         .pointer        = soc_pcm_pointer,
1032 };
1033
1034 #ifdef CONFIG_PM_SLEEP
1035 /* powers down audio subsystem for suspend */
1036 int snd_soc_suspend(struct device *dev)
1037 {
1038         struct snd_soc_card *card = dev_get_drvdata(dev);
1039         struct snd_soc_codec *codec;
1040         int i;
1041
1042         /* If the initialization of this soc device failed, there is no codec
1043          * associated with it. Just bail out in this case.
1044          */
1045         if (list_empty(&card->codec_dev_list))
1046                 return 0;
1047
1048         /* Due to the resume being scheduled into a workqueue we could
1049         * suspend before that's finished - wait for it to complete.
1050          */
1051         snd_power_lock(card->snd_card);
1052         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1053         snd_power_unlock(card->snd_card);
1054
1055         /* we're going to block userspace touching us until resume completes */
1056         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1057
1058         /* mute any active DACs */
1059         for (i = 0; i < card->num_rtd; i++) {
1060                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1061                 struct snd_soc_dai_driver *drv = dai->driver;
1062
1063                 if (card->rtd[i].dai_link->ignore_suspend)
1064                         continue;
1065
1066                 if (drv->ops->digital_mute && dai->playback_active)
1067                         drv->ops->digital_mute(dai, 1);
1068         }
1069
1070         /* suspend all pcms */
1071         for (i = 0; i < card->num_rtd; i++) {
1072                 if (card->rtd[i].dai_link->ignore_suspend)
1073                         continue;
1074
1075                 snd_pcm_suspend_all(card->rtd[i].pcm);
1076         }
1077
1078         if (card->suspend_pre)
1079                 card->suspend_pre(card);
1080
1081         for (i = 0; i < card->num_rtd; i++) {
1082                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1083                 struct snd_soc_platform *platform = card->rtd[i].platform;
1084
1085                 if (card->rtd[i].dai_link->ignore_suspend)
1086                         continue;
1087
1088                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1089                         cpu_dai->driver->suspend(cpu_dai);
1090                 if (platform->driver->suspend && !platform->suspended) {
1091                         platform->driver->suspend(cpu_dai);
1092                         platform->suspended = 1;
1093                 }
1094         }
1095
1096         /* close any waiting streams and save state */
1097         for (i = 0; i < card->num_rtd; i++) {
1098                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1099                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1100         }
1101
1102         for (i = 0; i < card->num_rtd; i++) {
1103                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1104
1105                 if (card->rtd[i].dai_link->ignore_suspend)
1106                         continue;
1107
1108                 if (driver->playback.stream_name != NULL)
1109                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1110                                 SND_SOC_DAPM_STREAM_SUSPEND);
1111
1112                 if (driver->capture.stream_name != NULL)
1113                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1114                                 SND_SOC_DAPM_STREAM_SUSPEND);
1115         }
1116
1117         /* suspend all CODECs */
1118         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1119                 /* If there are paths active then the CODEC will be held with
1120                  * bias _ON and should not be suspended. */
1121                 if (!codec->suspended && codec->driver->suspend) {
1122                         switch (codec->dapm.bias_level) {
1123                         case SND_SOC_BIAS_STANDBY:
1124                         case SND_SOC_BIAS_OFF:
1125                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1126                                 codec->suspended = 1;
1127                                 break;
1128                         default:
1129                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1130                                 break;
1131                         }
1132                 }
1133         }
1134
1135         for (i = 0; i < card->num_rtd; i++) {
1136                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1137
1138                 if (card->rtd[i].dai_link->ignore_suspend)
1139                         continue;
1140
1141                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1142                         cpu_dai->driver->suspend(cpu_dai);
1143         }
1144
1145         if (card->suspend_post)
1146                 card->suspend_post(card);
1147
1148         return 0;
1149 }
1150 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1151
1152 /* deferred resume work, so resume can complete before we finished
1153  * setting our codec back up, which can be very slow on I2C
1154  */
1155 static void soc_resume_deferred(struct work_struct *work)
1156 {
1157         struct snd_soc_card *card =
1158                         container_of(work, struct snd_soc_card, deferred_resume_work);
1159         struct snd_soc_codec *codec;
1160         int i;
1161
1162         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1163          * so userspace apps are blocked from touching us
1164          */
1165
1166         dev_dbg(card->dev, "starting resume work\n");
1167
1168         /* Bring us up into D2 so that DAPM starts enabling things */
1169         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1170
1171         if (card->resume_pre)
1172                 card->resume_pre(card);
1173
1174         /* resume AC97 DAIs */
1175         for (i = 0; i < card->num_rtd; i++) {
1176                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1177
1178                 if (card->rtd[i].dai_link->ignore_suspend)
1179                         continue;
1180
1181                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1182                         cpu_dai->driver->resume(cpu_dai);
1183         }
1184
1185         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1186                 /* If the CODEC was idle over suspend then it will have been
1187                  * left with bias OFF or STANDBY and suspended so we must now
1188                  * resume.  Otherwise the suspend was suppressed.
1189                  */
1190                 if (codec->driver->resume && codec->suspended) {
1191                         switch (codec->dapm.bias_level) {
1192                         case SND_SOC_BIAS_STANDBY:
1193                         case SND_SOC_BIAS_OFF:
1194                                 codec->driver->resume(codec);
1195                                 codec->suspended = 0;
1196                                 break;
1197                         default:
1198                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1199                                 break;
1200                         }
1201                 }
1202         }
1203
1204         for (i = 0; i < card->num_rtd; i++) {
1205                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1206
1207                 if (card->rtd[i].dai_link->ignore_suspend)
1208                         continue;
1209
1210                 if (driver->playback.stream_name != NULL)
1211                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1212                                 SND_SOC_DAPM_STREAM_RESUME);
1213
1214                 if (driver->capture.stream_name != NULL)
1215                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1216                                 SND_SOC_DAPM_STREAM_RESUME);
1217         }
1218
1219         /* unmute any active DACs */
1220         for (i = 0; i < card->num_rtd; i++) {
1221                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1222                 struct snd_soc_dai_driver *drv = dai->driver;
1223
1224                 if (card->rtd[i].dai_link->ignore_suspend)
1225                         continue;
1226
1227                 if (drv->ops->digital_mute && dai->playback_active)
1228                         drv->ops->digital_mute(dai, 0);
1229         }
1230
1231         for (i = 0; i < card->num_rtd; i++) {
1232                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1233                 struct snd_soc_platform *platform = card->rtd[i].platform;
1234
1235                 if (card->rtd[i].dai_link->ignore_suspend)
1236                         continue;
1237
1238                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1239                         cpu_dai->driver->resume(cpu_dai);
1240                 if (platform->driver->resume && platform->suspended) {
1241                         platform->driver->resume(cpu_dai);
1242                         platform->suspended = 0;
1243                 }
1244         }
1245
1246         if (card->resume_post)
1247                 card->resume_post(card);
1248
1249         dev_dbg(card->dev, "resume work completed\n");
1250
1251         /* userspace can access us now we are back as we were before */
1252         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1253 }
1254
1255 /* powers up audio subsystem after a suspend */
1256 int snd_soc_resume(struct device *dev)
1257 {
1258         struct snd_soc_card *card = dev_get_drvdata(dev);
1259         int i, ac97_control = 0;
1260
1261         /* AC97 devices might have other drivers hanging off them so
1262          * need to resume immediately.  Other drivers don't have that
1263          * problem and may take a substantial amount of time to resume
1264          * due to I/O costs and anti-pop so handle them out of line.
1265          */
1266         for (i = 0; i < card->num_rtd; i++) {
1267                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1268                 ac97_control |= cpu_dai->driver->ac97_control;
1269         }
1270         if (ac97_control) {
1271                 dev_dbg(dev, "Resuming AC97 immediately\n");
1272                 soc_resume_deferred(&card->deferred_resume_work);
1273         } else {
1274                 dev_dbg(dev, "Scheduling resume work\n");
1275                 if (!schedule_work(&card->deferred_resume_work))
1276                         dev_err(dev, "resume work item may be lost\n");
1277         }
1278
1279         return 0;
1280 }
1281 EXPORT_SYMBOL_GPL(snd_soc_resume);
1282 #else
1283 #define snd_soc_suspend NULL
1284 #define snd_soc_resume NULL
1285 #endif
1286
1287 static struct snd_soc_dai_ops null_dai_ops = {
1288 };
1289
1290 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1291 {
1292         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1293         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1294         struct snd_soc_codec *codec;
1295         struct snd_soc_platform *platform;
1296         struct snd_soc_dai *codec_dai, *cpu_dai;
1297         const char *platform_name;
1298
1299         if (rtd->complete)
1300                 return 1;
1301         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1302
1303         /* do we already have the CPU DAI for this link ? */
1304         if (rtd->cpu_dai) {
1305                 goto find_codec;
1306         }
1307         /* no, then find CPU DAI from registered DAIs*/
1308         list_for_each_entry(cpu_dai, &dai_list, list) {
1309                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1310
1311                         if (!try_module_get(cpu_dai->dev->driver->owner))
1312                                 return -ENODEV;
1313
1314                         rtd->cpu_dai = cpu_dai;
1315                         goto find_codec;
1316                 }
1317         }
1318         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1319                         dai_link->cpu_dai_name);
1320
1321 find_codec:
1322         /* do we already have the CODEC for this link ? */
1323         if (rtd->codec) {
1324                 goto find_platform;
1325         }
1326
1327         /* no, then find CODEC from registered CODECs*/
1328         list_for_each_entry(codec, &codec_list, list) {
1329                 if (!strcmp(codec->name, dai_link->codec_name)) {
1330                         rtd->codec = codec;
1331
1332                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1333                         list_for_each_entry(codec_dai, &dai_list, list) {
1334                                 if (codec->dev == codec_dai->dev &&
1335                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1336                                         rtd->codec_dai = codec_dai;
1337                                         goto find_platform;
1338                                 }
1339                         }
1340                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1341                                         dai_link->codec_dai_name);
1342
1343                         goto find_platform;
1344                 }
1345         }
1346         dev_dbg(card->dev, "CODEC %s not registered\n",
1347                         dai_link->codec_name);
1348
1349 find_platform:
1350         /* do we need a platform? */
1351         if (rtd->platform)
1352                 goto out;
1353
1354         /* if there's no platform we match on the empty platform */
1355         platform_name = dai_link->platform_name;
1356         if (!platform_name)
1357                 platform_name = "snd-soc-dummy";
1358
1359         /* no, then find one from the set of registered platforms */
1360         list_for_each_entry(platform, &platform_list, list) {
1361                 if (!strcmp(platform->name, platform_name)) {
1362                         rtd->platform = platform;
1363                         goto out;
1364                 }
1365         }
1366
1367         dev_dbg(card->dev, "platform %s not registered\n",
1368                         dai_link->platform_name);
1369         return 0;
1370
1371 out:
1372         /* mark rtd as complete if we found all 4 of our client devices */
1373         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1374                 rtd->complete = 1;
1375                 card->num_rtd++;
1376         }
1377         return 1;
1378 }
1379
1380 static void soc_remove_codec(struct snd_soc_codec *codec)
1381 {
1382         int err;
1383
1384         if (codec->driver->remove) {
1385                 err = codec->driver->remove(codec);
1386                 if (err < 0)
1387                         dev_err(codec->dev,
1388                                 "asoc: failed to remove %s: %d\n",
1389                                 codec->name, err);
1390         }
1391
1392         /* Make sure all DAPM widgets are freed */
1393         snd_soc_dapm_free(&codec->dapm);
1394
1395         soc_cleanup_codec_debugfs(codec);
1396         codec->probed = 0;
1397         list_del(&codec->card_list);
1398         module_put(codec->dev->driver->owner);
1399 }
1400
1401 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1402 {
1403         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1404         struct snd_soc_codec *codec = rtd->codec;
1405         struct snd_soc_platform *platform = rtd->platform;
1406         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1407         int err;
1408
1409         /* unregister the rtd device */
1410         if (rtd->dev_registered) {
1411                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1412                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1413                 device_unregister(&rtd->dev);
1414                 rtd->dev_registered = 0;
1415         }
1416
1417         /* remove the CODEC DAI */
1418         if (codec_dai && codec_dai->probed) {
1419                 if (codec_dai->driver->remove) {
1420                         err = codec_dai->driver->remove(codec_dai);
1421                         if (err < 0)
1422                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1423                 }
1424                 codec_dai->probed = 0;
1425                 list_del(&codec_dai->card_list);
1426         }
1427
1428         /* remove the platform */
1429         if (platform && platform->probed) {
1430                 if (platform->driver->remove) {
1431                         err = platform->driver->remove(platform);
1432                         if (err < 0)
1433                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1434                 }
1435                 platform->probed = 0;
1436                 list_del(&platform->card_list);
1437                 module_put(platform->dev->driver->owner);
1438         }
1439
1440         /* remove the CODEC */
1441         if (codec && codec->probed)
1442                 soc_remove_codec(codec);
1443
1444         /* remove the cpu_dai */
1445         if (cpu_dai && cpu_dai->probed) {
1446                 if (cpu_dai->driver->remove) {
1447                         err = cpu_dai->driver->remove(cpu_dai);
1448                         if (err < 0)
1449                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1450                 }
1451                 cpu_dai->probed = 0;
1452                 list_del(&cpu_dai->card_list);
1453                 module_put(cpu_dai->dev->driver->owner);
1454         }
1455 }
1456
1457 static void soc_remove_dai_links(struct snd_soc_card *card)
1458 {
1459         int i;
1460
1461         for (i = 0; i < card->num_rtd; i++)
1462                 soc_remove_dai_link(card, i);
1463
1464         card->num_rtd = 0;
1465 }
1466
1467 static void soc_set_name_prefix(struct snd_soc_card *card,
1468                                 struct snd_soc_codec *codec)
1469 {
1470         int i;
1471
1472         if (card->codec_conf == NULL)
1473                 return;
1474
1475         for (i = 0; i < card->num_configs; i++) {
1476                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1477                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1478                         codec->name_prefix = map->name_prefix;
1479                         break;
1480                 }
1481         }
1482 }
1483
1484 static int soc_probe_codec(struct snd_soc_card *card,
1485                            struct snd_soc_codec *codec)
1486 {
1487         int ret = 0;
1488         const struct snd_soc_codec_driver *driver = codec->driver;
1489
1490         codec->card = card;
1491         codec->dapm.card = card;
1492         soc_set_name_prefix(card, codec);
1493
1494         if (!try_module_get(codec->dev->driver->owner))
1495                 return -ENODEV;
1496
1497         soc_init_codec_debugfs(codec);
1498
1499         if (driver->dapm_widgets)
1500                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1501                                           driver->num_dapm_widgets);
1502
1503         if (driver->probe) {
1504                 ret = driver->probe(codec);
1505                 if (ret < 0) {
1506                         dev_err(codec->dev,
1507                                 "asoc: failed to probe CODEC %s: %d\n",
1508                                 codec->name, ret);
1509                         goto err_probe;
1510                 }
1511         }
1512
1513         if (driver->controls)
1514                 snd_soc_add_controls(codec, driver->controls,
1515                                      driver->num_controls);
1516         if (driver->dapm_routes)
1517                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1518                                         driver->num_dapm_routes);
1519
1520         /* mark codec as probed and add to card codec list */
1521         codec->probed = 1;
1522         list_add(&codec->card_list, &card->codec_dev_list);
1523         list_add(&codec->dapm.list, &card->dapm_list);
1524
1525         return 0;
1526
1527 err_probe:
1528         soc_cleanup_codec_debugfs(codec);
1529         module_put(codec->dev->driver->owner);
1530
1531         return ret;
1532 }
1533
1534 static void rtd_release(struct device *dev) {}
1535
1536 static int soc_post_component_init(struct snd_soc_card *card,
1537                                    struct snd_soc_codec *codec,
1538                                    int num, int dailess)
1539 {
1540         struct snd_soc_dai_link *dai_link = NULL;
1541         struct snd_soc_aux_dev *aux_dev = NULL;
1542         struct snd_soc_pcm_runtime *rtd;
1543         const char *temp, *name;
1544         int ret = 0;
1545
1546         if (!dailess) {
1547                 dai_link = &card->dai_link[num];
1548                 rtd = &card->rtd[num];
1549                 name = dai_link->name;
1550         } else {
1551                 aux_dev = &card->aux_dev[num];
1552                 rtd = &card->rtd_aux[num];
1553                 name = aux_dev->name;
1554         }
1555         rtd->card = card;
1556
1557         /* machine controls, routes and widgets are not prefixed */
1558         temp = codec->name_prefix;
1559         codec->name_prefix = NULL;
1560
1561         /* do machine specific initialization */
1562         if (!dailess && dai_link->init)
1563                 ret = dai_link->init(rtd);
1564         else if (dailess && aux_dev->init)
1565                 ret = aux_dev->init(&codec->dapm);
1566         if (ret < 0) {
1567                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1568                 return ret;
1569         }
1570         codec->name_prefix = temp;
1571
1572         /* Make sure all DAPM widgets are instantiated */
1573         snd_soc_dapm_new_widgets(&codec->dapm);
1574
1575         /* register the rtd device */
1576         rtd->codec = codec;
1577         rtd->dev.parent = card->dev;
1578         rtd->dev.release = rtd_release;
1579         rtd->dev.init_name = name;
1580         ret = device_register(&rtd->dev);
1581         if (ret < 0) {
1582                 dev_err(card->dev,
1583                         "asoc: failed to register runtime device: %d\n", ret);
1584                 return ret;
1585         }
1586         rtd->dev_registered = 1;
1587
1588         /* add DAPM sysfs entries for this codec */
1589         ret = snd_soc_dapm_sys_add(&rtd->dev);
1590         if (ret < 0)
1591                 dev_err(codec->dev,
1592                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1593                         ret);
1594
1595         /* add codec sysfs entries */
1596         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1597         if (ret < 0)
1598                 dev_err(codec->dev,
1599                         "asoc: failed to add codec sysfs files: %d\n", ret);
1600
1601         return 0;
1602 }
1603
1604 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1605 {
1606         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1607         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1608         struct snd_soc_codec *codec = rtd->codec;
1609         struct snd_soc_platform *platform = rtd->platform;
1610         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1611         int ret;
1612
1613         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1614
1615         /* config components */
1616         codec_dai->codec = codec;
1617         cpu_dai->platform = platform;
1618         codec_dai->card = card;
1619         cpu_dai->card = card;
1620
1621         /* set default power off timeout */
1622         rtd->pmdown_time = pmdown_time;
1623
1624         /* probe the cpu_dai */
1625         if (!cpu_dai->probed) {
1626                 if (cpu_dai->driver->probe) {
1627                         ret = cpu_dai->driver->probe(cpu_dai);
1628                         if (ret < 0) {
1629                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1630                                                 cpu_dai->name);
1631                                 return ret;
1632                         }
1633                 }
1634                 cpu_dai->probed = 1;
1635                 /* mark cpu_dai as probed and add to card cpu_dai list */
1636                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1637         }
1638
1639         /* probe the CODEC */
1640         if (!codec->probed) {
1641                 ret = soc_probe_codec(card, codec);
1642                 if (ret < 0)
1643                         return ret;
1644         }
1645
1646         /* probe the platform */
1647         if (!platform->probed) {
1648                 if (!try_module_get(platform->dev->driver->owner))
1649                         return -ENODEV;
1650
1651                 if (platform->driver->probe) {
1652                         ret = platform->driver->probe(platform);
1653                         if (ret < 0) {
1654                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1655                                                 platform->name);
1656                                 module_put(platform->dev->driver->owner);
1657                                 return ret;
1658                         }
1659                 }
1660                 /* mark platform as probed and add to card platform list */
1661                 platform->probed = 1;
1662                 list_add(&platform->card_list, &card->platform_dev_list);
1663         }
1664
1665         /* probe the CODEC DAI */
1666         if (!codec_dai->probed) {
1667                 if (codec_dai->driver->probe) {
1668                         ret = codec_dai->driver->probe(codec_dai);
1669                         if (ret < 0) {
1670                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1671                                                 codec_dai->name);
1672                                 return ret;
1673                         }
1674                 }
1675
1676                 /* mark cpu_dai as probed and add to card cpu_dai list */
1677                 codec_dai->probed = 1;
1678                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1679         }
1680
1681         /* DAPM dai link stream work */
1682         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1683
1684         ret = soc_post_component_init(card, codec, num, 0);
1685         if (ret)
1686                 return ret;
1687
1688         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1689         if (ret < 0)
1690                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1691
1692         /* create the pcm */
1693         ret = soc_new_pcm(rtd, num);
1694         if (ret < 0) {
1695                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1696                 return ret;
1697         }
1698
1699         /* add platform data for AC97 devices */
1700         if (rtd->codec_dai->driver->ac97_control)
1701                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1702
1703         return 0;
1704 }
1705
1706 #ifdef CONFIG_SND_SOC_AC97_BUS
1707 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1708 {
1709         int ret;
1710
1711         /* Only instantiate AC97 if not already done by the adaptor
1712          * for the generic AC97 subsystem.
1713          */
1714         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1715                 /*
1716                  * It is possible that the AC97 device is already registered to
1717                  * the device subsystem. This happens when the device is created
1718                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1719                  * is the generic AC97 glue but others migh emerge.
1720                  *
1721                  * In those cases we don't try to register the device again.
1722                  */
1723                 if (!rtd->codec->ac97_created)
1724                         return 0;
1725
1726                 ret = soc_ac97_dev_register(rtd->codec);
1727                 if (ret < 0) {
1728                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1729                         return ret;
1730                 }
1731
1732                 rtd->codec->ac97_registered = 1;
1733         }
1734         return 0;
1735 }
1736
1737 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1738 {
1739         if (codec->ac97_registered) {
1740                 soc_ac97_dev_unregister(codec);
1741                 codec->ac97_registered = 0;
1742         }
1743 }
1744 #endif
1745
1746 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1747 {
1748         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1749         struct snd_soc_codec *codec;
1750         int ret = -ENODEV;
1751
1752         /* find CODEC from registered CODECs*/
1753         list_for_each_entry(codec, &codec_list, list) {
1754                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1755                         if (codec->probed) {
1756                                 dev_err(codec->dev,
1757                                         "asoc: codec already probed");
1758                                 ret = -EBUSY;
1759                                 goto out;
1760                         }
1761                         goto found;
1762                 }
1763         }
1764         /* codec not found */
1765         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1766         goto out;
1767
1768 found:
1769         ret = soc_probe_codec(card, codec);
1770         if (ret < 0)
1771                 return ret;
1772
1773         ret = soc_post_component_init(card, codec, num, 1);
1774
1775 out:
1776         return ret;
1777 }
1778
1779 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1780 {
1781         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1782         struct snd_soc_codec *codec = rtd->codec;
1783
1784         /* unregister the rtd device */
1785         if (rtd->dev_registered) {
1786                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1787                 device_unregister(&rtd->dev);
1788                 rtd->dev_registered = 0;
1789         }
1790
1791         if (codec && codec->probed)
1792                 soc_remove_codec(codec);
1793 }
1794
1795 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1796                                     enum snd_soc_compress_type compress_type)
1797 {
1798         int ret;
1799
1800         if (codec->cache_init)
1801                 return 0;
1802
1803         /* override the compress_type if necessary */
1804         if (compress_type && codec->compress_type != compress_type)
1805                 codec->compress_type = compress_type;
1806         ret = snd_soc_cache_init(codec);
1807         if (ret < 0) {
1808                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1809                         ret);
1810                 return ret;
1811         }
1812         codec->cache_init = 1;
1813         return 0;
1814 }
1815
1816 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1817 {
1818         struct snd_soc_codec *codec;
1819         struct snd_soc_codec_conf *codec_conf;
1820         enum snd_soc_compress_type compress_type;
1821         int ret, i;
1822
1823         mutex_lock(&card->mutex);
1824
1825         if (card->instantiated) {
1826                 mutex_unlock(&card->mutex);
1827                 return;
1828         }
1829
1830         /* bind DAIs */
1831         for (i = 0; i < card->num_links; i++)
1832                 soc_bind_dai_link(card, i);
1833
1834         /* bind completed ? */
1835         if (card->num_rtd != card->num_links) {
1836                 mutex_unlock(&card->mutex);
1837                 return;
1838         }
1839
1840         /* initialize the register cache for each available codec */
1841         list_for_each_entry(codec, &codec_list, list) {
1842                 if (codec->cache_init)
1843                         continue;
1844                 /* by default we don't override the compress_type */
1845                 compress_type = 0;
1846                 /* check to see if we need to override the compress_type */
1847                 for (i = 0; i < card->num_configs; ++i) {
1848                         codec_conf = &card->codec_conf[i];
1849                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1850                                 compress_type = codec_conf->compress_type;
1851                                 if (compress_type && compress_type
1852                                     != codec->compress_type)
1853                                         break;
1854                         }
1855                 }
1856                 ret = snd_soc_init_codec_cache(codec, compress_type);
1857                 if (ret < 0) {
1858                         mutex_unlock(&card->mutex);
1859                         return;
1860                 }
1861         }
1862
1863         /* card bind complete so register a sound card */
1864         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1865                         card->owner, 0, &card->snd_card);
1866         if (ret < 0) {
1867                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1868                         card->name);
1869                 mutex_unlock(&card->mutex);
1870                 return;
1871         }
1872         card->snd_card->dev = card->dev;
1873
1874         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1875         card->dapm.dev = card->dev;
1876         card->dapm.card = card;
1877         list_add(&card->dapm.list, &card->dapm_list);
1878
1879 #ifdef CONFIG_DEBUG_FS
1880         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1881 #endif
1882
1883 #ifdef CONFIG_PM_SLEEP
1884         /* deferred resume work */
1885         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1886 #endif
1887
1888         if (card->dapm_widgets)
1889                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1890                                           card->num_dapm_widgets);
1891
1892         /* initialise the sound card only once */
1893         if (card->probe) {
1894                 ret = card->probe(card);
1895                 if (ret < 0)
1896                         goto card_probe_error;
1897         }
1898
1899         for (i = 0; i < card->num_links; i++) {
1900                 ret = soc_probe_dai_link(card, i);
1901                 if (ret < 0) {
1902                         pr_err("asoc: failed to instantiate card %s: %d\n",
1903                                card->name, ret);
1904                         goto probe_dai_err;
1905                 }
1906         }
1907
1908         for (i = 0; i < card->num_aux_devs; i++) {
1909                 ret = soc_probe_aux_dev(card, i);
1910                 if (ret < 0) {
1911                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1912                                card->name, ret);
1913                         goto probe_aux_dev_err;
1914                 }
1915         }
1916
1917         /* We should have a non-codec control add function but we don't */
1918         if (card->controls)
1919                 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1920                                                       struct snd_soc_codec,
1921                                                       card_list),
1922                                      card->controls,
1923                                      card->num_controls);
1924
1925         if (card->dapm_routes)
1926                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1927                                         card->num_dapm_routes);
1928
1929         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1930                  "%s",  card->name);
1931         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1932                  "%s", card->name);
1933
1934         if (card->late_probe) {
1935                 ret = card->late_probe(card);
1936                 if (ret < 0) {
1937                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1938                                 card->name, ret);
1939                         goto probe_aux_dev_err;
1940                 }
1941         }
1942
1943         ret = snd_card_register(card->snd_card);
1944         if (ret < 0) {
1945                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1946                 goto probe_aux_dev_err;
1947         }
1948
1949 #ifdef CONFIG_SND_SOC_AC97_BUS
1950         /* register any AC97 codecs */
1951         for (i = 0; i < card->num_rtd; i++) {
1952                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1953                 if (ret < 0) {
1954                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1955                         while (--i >= 0)
1956                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1957                         goto probe_aux_dev_err;
1958                 }
1959         }
1960 #endif
1961
1962         card->instantiated = 1;
1963         mutex_unlock(&card->mutex);
1964         return;
1965
1966 probe_aux_dev_err:
1967         for (i = 0; i < card->num_aux_devs; i++)
1968                 soc_remove_aux_dev(card, i);
1969
1970 probe_dai_err:
1971         soc_remove_dai_links(card);
1972
1973 card_probe_error:
1974         if (card->remove)
1975                 card->remove(card);
1976
1977         snd_card_free(card->snd_card);
1978
1979         mutex_unlock(&card->mutex);
1980 }
1981
1982 /*
1983  * Attempt to initialise any uninitialised cards.  Must be called with
1984  * client_mutex.
1985  */
1986 static void snd_soc_instantiate_cards(void)
1987 {
1988         struct snd_soc_card *card;
1989         list_for_each_entry(card, &card_list, list)
1990                 snd_soc_instantiate_card(card);
1991 }
1992
1993 /* probes a new socdev */
1994 static int soc_probe(struct platform_device *pdev)
1995 {
1996         struct snd_soc_card *card = platform_get_drvdata(pdev);
1997         int ret = 0;
1998
1999         /*
2000          * no card, so machine driver should be registering card
2001          * we should not be here in that case so ret error
2002          */
2003         if (!card)
2004                 return -EINVAL;
2005
2006         /* Bodge while we unpick instantiation */
2007         card->dev = &pdev->dev;
2008
2009         ret = snd_soc_register_card(card);
2010         if (ret != 0) {
2011                 dev_err(&pdev->dev, "Failed to register card\n");
2012                 return ret;
2013         }
2014
2015         return 0;
2016 }
2017
2018 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2019 {
2020         int i;
2021
2022         /* make sure any delayed work runs */
2023         for (i = 0; i < card->num_rtd; i++) {
2024                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2025                 flush_delayed_work_sync(&rtd->delayed_work);
2026         }
2027
2028         /* remove auxiliary devices */
2029         for (i = 0; i < card->num_aux_devs; i++)
2030                 soc_remove_aux_dev(card, i);
2031
2032         /* remove and free each DAI */
2033         soc_remove_dai_links(card);
2034
2035         soc_cleanup_card_debugfs(card);
2036
2037         /* remove the card */
2038         if (card->remove)
2039                 card->remove(card);
2040
2041         snd_soc_dapm_free(&card->dapm);
2042
2043         kfree(card->rtd);
2044         snd_card_free(card->snd_card);
2045         return 0;
2046
2047 }
2048
2049 /* removes a socdev */
2050 static int soc_remove(struct platform_device *pdev)
2051 {
2052         struct snd_soc_card *card = platform_get_drvdata(pdev);
2053
2054         snd_soc_unregister_card(card);
2055         return 0;
2056 }
2057
2058 int snd_soc_poweroff(struct device *dev)
2059 {
2060         struct snd_soc_card *card = dev_get_drvdata(dev);
2061         int i;
2062
2063         if (!card->instantiated)
2064                 return 0;
2065
2066         /* Flush out pmdown_time work - we actually do want to run it
2067          * now, we're shutting down so no imminent restart. */
2068         for (i = 0; i < card->num_rtd; i++) {
2069                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2070                 flush_delayed_work_sync(&rtd->delayed_work);
2071         }
2072
2073         snd_soc_dapm_shutdown(card);
2074
2075         return 0;
2076 }
2077 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2078
2079 const struct dev_pm_ops snd_soc_pm_ops = {
2080         .suspend = snd_soc_suspend,
2081         .resume = snd_soc_resume,
2082         .poweroff = snd_soc_poweroff,
2083 };
2084 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2085
2086 /* ASoC platform driver */
2087 static struct platform_driver soc_driver = {
2088         .driver         = {
2089                 .name           = "soc-audio",
2090                 .owner          = THIS_MODULE,
2091                 .pm             = &snd_soc_pm_ops,
2092         },
2093         .probe          = soc_probe,
2094         .remove         = soc_remove,
2095 };
2096
2097 /* create a new pcm */
2098 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2099 {
2100         struct snd_soc_codec *codec = rtd->codec;
2101         struct snd_soc_platform *platform = rtd->platform;
2102         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2103         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2104         struct snd_pcm *pcm;
2105         char new_name[64];
2106         int ret = 0, playback = 0, capture = 0;
2107
2108         /* check client and interface hw capabilities */
2109         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2110                         rtd->dai_link->stream_name, codec_dai->name, num);
2111
2112         if (codec_dai->driver->playback.channels_min)
2113                 playback = 1;
2114         if (codec_dai->driver->capture.channels_min)
2115                 capture = 1;
2116
2117         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2118         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2119                         num, playback, capture, &pcm);
2120         if (ret < 0) {
2121                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2122                 return ret;
2123         }
2124
2125         rtd->pcm = pcm;
2126         pcm->private_data = rtd;
2127         if (platform->driver->ops) {
2128                 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2129                 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2130                 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2131                 soc_pcm_ops.copy = platform->driver->ops->copy;
2132                 soc_pcm_ops.silence = platform->driver->ops->silence;
2133                 soc_pcm_ops.ack = platform->driver->ops->ack;
2134                 soc_pcm_ops.page = platform->driver->ops->page;
2135         }
2136
2137         if (playback)
2138                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2139
2140         if (capture)
2141                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2142
2143         if (platform->driver->pcm_new) {
2144                 ret = platform->driver->pcm_new(rtd->card->snd_card,
2145                                                 codec_dai, pcm);
2146                 if (ret < 0) {
2147                         pr_err("asoc: platform pcm constructor failed\n");
2148                         return ret;
2149                 }
2150         }
2151
2152         pcm->private_free = platform->driver->pcm_free;
2153         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2154                 cpu_dai->name);
2155         return ret;
2156 }
2157
2158 /**
2159  * snd_soc_codec_volatile_register: Report if a register is volatile.
2160  *
2161  * @codec: CODEC to query.
2162  * @reg: Register to query.
2163  *
2164  * Boolean function indiciating if a CODEC register is volatile.
2165  */
2166 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2167                                     unsigned int reg)
2168 {
2169         if (codec->volatile_register)
2170                 return codec->volatile_register(codec, reg);
2171         else
2172                 return 0;
2173 }
2174 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2175
2176 /**
2177  * snd_soc_codec_readable_register: Report if a register is readable.
2178  *
2179  * @codec: CODEC to query.
2180  * @reg: Register to query.
2181  *
2182  * Boolean function indicating if a CODEC register is readable.
2183  */
2184 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2185                                     unsigned int reg)
2186 {
2187         if (codec->readable_register)
2188                 return codec->readable_register(codec, reg);
2189         else
2190                 return 0;
2191 }
2192 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2193
2194 /**
2195  * snd_soc_codec_writable_register: Report if a register is writable.
2196  *
2197  * @codec: CODEC to query.
2198  * @reg: Register to query.
2199  *
2200  * Boolean function indicating if a CODEC register is writable.
2201  */
2202 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2203                                     unsigned int reg)
2204 {
2205         if (codec->writable_register)
2206                 return codec->writable_register(codec, reg);
2207         else
2208                 return 0;
2209 }
2210 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2211
2212 /**
2213  * snd_soc_new_ac97_codec - initailise AC97 device
2214  * @codec: audio codec
2215  * @ops: AC97 bus operations
2216  * @num: AC97 codec number
2217  *
2218  * Initialises AC97 codec resources for use by ad-hoc devices only.
2219  */
2220 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2221         struct snd_ac97_bus_ops *ops, int num)
2222 {
2223         mutex_lock(&codec->mutex);
2224
2225         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2226         if (codec->ac97 == NULL) {
2227                 mutex_unlock(&codec->mutex);
2228                 return -ENOMEM;
2229         }
2230
2231         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2232         if (codec->ac97->bus == NULL) {
2233                 kfree(codec->ac97);
2234                 codec->ac97 = NULL;
2235                 mutex_unlock(&codec->mutex);
2236                 return -ENOMEM;
2237         }
2238
2239         codec->ac97->bus->ops = ops;
2240         codec->ac97->num = num;
2241
2242         /*
2243          * Mark the AC97 device to be created by us. This way we ensure that the
2244          * device will be registered with the device subsystem later on.
2245          */
2246         codec->ac97_created = 1;
2247
2248         mutex_unlock(&codec->mutex);
2249         return 0;
2250 }
2251 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2252
2253 /**
2254  * snd_soc_free_ac97_codec - free AC97 codec device
2255  * @codec: audio codec
2256  *
2257  * Frees AC97 codec device resources.
2258  */
2259 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2260 {
2261         mutex_lock(&codec->mutex);
2262 #ifdef CONFIG_SND_SOC_AC97_BUS
2263         soc_unregister_ac97_dai_link(codec);
2264 #endif
2265         kfree(codec->ac97->bus);
2266         kfree(codec->ac97);
2267         codec->ac97 = NULL;
2268         codec->ac97_created = 0;
2269         mutex_unlock(&codec->mutex);
2270 }
2271 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2272
2273 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2274 {
2275         unsigned int ret;
2276
2277         ret = codec->read(codec, reg);
2278         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2279         trace_snd_soc_reg_read(codec, reg, ret);
2280
2281         return ret;
2282 }
2283 EXPORT_SYMBOL_GPL(snd_soc_read);
2284
2285 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2286                            unsigned int reg, unsigned int val)
2287 {
2288         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2289         trace_snd_soc_reg_write(codec, reg, val);
2290         return codec->write(codec, reg, val);
2291 }
2292 EXPORT_SYMBOL_GPL(snd_soc_write);
2293
2294 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2295                                     unsigned int reg, const void *data, size_t len)
2296 {
2297         return codec->bulk_write_raw(codec, reg, data, len);
2298 }
2299 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2300
2301 /**
2302  * snd_soc_update_bits - update codec register bits
2303  * @codec: audio codec
2304  * @reg: codec register
2305  * @mask: register mask
2306  * @value: new value
2307  *
2308  * Writes new register value.
2309  *
2310  * Returns 1 for change, 0 for no change, or negative error code.
2311  */
2312 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2313                                 unsigned int mask, unsigned int value)
2314 {
2315         int change;
2316         unsigned int old, new;
2317         int ret;
2318
2319         ret = snd_soc_read(codec, reg);
2320         if (ret < 0)
2321                 return ret;
2322
2323         old = ret;
2324         new = (old & ~mask) | value;
2325         change = old != new;
2326         if (change) {
2327                 ret = snd_soc_write(codec, reg, new);
2328                 if (ret < 0)
2329                         return ret;
2330         }
2331
2332         return change;
2333 }
2334 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2335
2336 /**
2337  * snd_soc_update_bits_locked - update codec register bits
2338  * @codec: audio codec
2339  * @reg: codec register
2340  * @mask: register mask
2341  * @value: new value
2342  *
2343  * Writes new register value, and takes the codec mutex.
2344  *
2345  * Returns 1 for change else 0.
2346  */
2347 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2348                                unsigned short reg, unsigned int mask,
2349                                unsigned int value)
2350 {
2351         int change;
2352
2353         mutex_lock(&codec->mutex);
2354         change = snd_soc_update_bits(codec, reg, mask, value);
2355         mutex_unlock(&codec->mutex);
2356
2357         return change;
2358 }
2359 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2360
2361 /**
2362  * snd_soc_test_bits - test register for change
2363  * @codec: audio codec
2364  * @reg: codec register
2365  * @mask: register mask
2366  * @value: new value
2367  *
2368  * Tests a register with a new value and checks if the new value is
2369  * different from the old value.
2370  *
2371  * Returns 1 for change else 0.
2372  */
2373 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2374                                 unsigned int mask, unsigned int value)
2375 {
2376         int change;
2377         unsigned int old, new;
2378
2379         old = snd_soc_read(codec, reg);
2380         new = (old & ~mask) | value;
2381         change = old != new;
2382
2383         return change;
2384 }
2385 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2386
2387 /**
2388  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2389  * @substream: the pcm substream
2390  * @hw: the hardware parameters
2391  *
2392  * Sets the substream runtime hardware parameters.
2393  */
2394 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2395         const struct snd_pcm_hardware *hw)
2396 {
2397         struct snd_pcm_runtime *runtime = substream->runtime;
2398         runtime->hw.info = hw->info;
2399         runtime->hw.formats = hw->formats;
2400         runtime->hw.period_bytes_min = hw->period_bytes_min;
2401         runtime->hw.period_bytes_max = hw->period_bytes_max;
2402         runtime->hw.periods_min = hw->periods_min;
2403         runtime->hw.periods_max = hw->periods_max;
2404         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2405         runtime->hw.fifo_size = hw->fifo_size;
2406         return 0;
2407 }
2408 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2409
2410 /**
2411  * snd_soc_cnew - create new control
2412  * @_template: control template
2413  * @data: control private data
2414  * @long_name: control long name
2415  * @prefix: control name prefix
2416  *
2417  * Create a new mixer control from a template control.
2418  *
2419  * Returns 0 for success, else error.
2420  */
2421 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2422                                   void *data, char *long_name,
2423                                   const char *prefix)
2424 {
2425         struct snd_kcontrol_new template;
2426         struct snd_kcontrol *kcontrol;
2427         char *name = NULL;
2428         int name_len;
2429
2430         memcpy(&template, _template, sizeof(template));
2431         template.index = 0;
2432
2433         if (!long_name)
2434                 long_name = template.name;
2435
2436         if (prefix) {
2437                 name_len = strlen(long_name) + strlen(prefix) + 2;
2438                 name = kmalloc(name_len, GFP_ATOMIC);
2439                 if (!name)
2440                         return NULL;
2441
2442                 snprintf(name, name_len, "%s %s", prefix, long_name);
2443
2444                 template.name = name;
2445         } else {
2446                 template.name = long_name;
2447         }
2448
2449         kcontrol = snd_ctl_new1(&template, data);
2450
2451         kfree(name);
2452
2453         return kcontrol;
2454 }
2455 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2456
2457 /**
2458  * snd_soc_add_controls - add an array of controls to a codec.
2459  * Convienience function to add a list of controls. Many codecs were
2460  * duplicating this code.
2461  *
2462  * @codec: codec to add controls to
2463  * @controls: array of controls to add
2464  * @num_controls: number of elements in the array
2465  *
2466  * Return 0 for success, else error.
2467  */
2468 int snd_soc_add_controls(struct snd_soc_codec *codec,
2469         const struct snd_kcontrol_new *controls, int num_controls)
2470 {
2471         struct snd_card *card = codec->card->snd_card;
2472         int err, i;
2473
2474         for (i = 0; i < num_controls; i++) {
2475                 const struct snd_kcontrol_new *control = &controls[i];
2476                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2477                                                      control->name,
2478                                                      codec->name_prefix));
2479                 if (err < 0) {
2480                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2481                                 codec->name, control->name, err);
2482                         return err;
2483                 }
2484         }
2485
2486         return 0;
2487 }
2488 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2489
2490 /**
2491  * snd_soc_info_enum_double - enumerated double mixer info callback
2492  * @kcontrol: mixer control
2493  * @uinfo: control element information
2494  *
2495  * Callback to provide information about a double enumerated
2496  * mixer control.
2497  *
2498  * Returns 0 for success.
2499  */
2500 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2501         struct snd_ctl_elem_info *uinfo)
2502 {
2503         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2504
2505         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2506         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2507         uinfo->value.enumerated.items = e->max;
2508
2509         if (uinfo->value.enumerated.item > e->max - 1)
2510                 uinfo->value.enumerated.item = e->max - 1;
2511         strcpy(uinfo->value.enumerated.name,
2512                 e->texts[uinfo->value.enumerated.item]);
2513         return 0;
2514 }
2515 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2516
2517 /**
2518  * snd_soc_get_enum_double - enumerated double mixer get callback
2519  * @kcontrol: mixer control
2520  * @ucontrol: control element information
2521  *
2522  * Callback to get the value of a double enumerated mixer.
2523  *
2524  * Returns 0 for success.
2525  */
2526 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2527         struct snd_ctl_elem_value *ucontrol)
2528 {
2529         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2530         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2531         unsigned int val, bitmask;
2532
2533         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2534                 ;
2535         val = snd_soc_read(codec, e->reg);
2536         ucontrol->value.enumerated.item[0]
2537                 = (val >> e->shift_l) & (bitmask - 1);
2538         if (e->shift_l != e->shift_r)
2539                 ucontrol->value.enumerated.item[1] =
2540                         (val >> e->shift_r) & (bitmask - 1);
2541
2542         return 0;
2543 }
2544 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2545
2546 /**
2547  * snd_soc_put_enum_double - enumerated double mixer put callback
2548  * @kcontrol: mixer control
2549  * @ucontrol: control element information
2550  *
2551  * Callback to set the value of a double enumerated mixer.
2552  *
2553  * Returns 0 for success.
2554  */
2555 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2556         struct snd_ctl_elem_value *ucontrol)
2557 {
2558         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2559         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2560         unsigned int val;
2561         unsigned int mask, bitmask;
2562
2563         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2564                 ;
2565         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2566                 return -EINVAL;
2567         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2568         mask = (bitmask - 1) << e->shift_l;
2569         if (e->shift_l != e->shift_r) {
2570                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2571                         return -EINVAL;
2572                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2573                 mask |= (bitmask - 1) << e->shift_r;
2574         }
2575
2576         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2577 }
2578 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2579
2580 /**
2581  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2582  * @kcontrol: mixer control
2583  * @ucontrol: control element information
2584  *
2585  * Callback to get the value of a double semi enumerated mixer.
2586  *
2587  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2588  * used for handling bitfield coded enumeration for example.
2589  *
2590  * Returns 0 for success.
2591  */
2592 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2593         struct snd_ctl_elem_value *ucontrol)
2594 {
2595         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2596         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2597         unsigned int reg_val, val, mux;
2598
2599         reg_val = snd_soc_read(codec, e->reg);
2600         val = (reg_val >> e->shift_l) & e->mask;
2601         for (mux = 0; mux < e->max; mux++) {
2602                 if (val == e->values[mux])
2603                         break;
2604         }
2605         ucontrol->value.enumerated.item[0] = mux;
2606         if (e->shift_l != e->shift_r) {
2607                 val = (reg_val >> e->shift_r) & e->mask;
2608                 for (mux = 0; mux < e->max; mux++) {
2609                         if (val == e->values[mux])
2610                                 break;
2611                 }
2612                 ucontrol->value.enumerated.item[1] = mux;
2613         }
2614
2615         return 0;
2616 }
2617 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2618
2619 /**
2620  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2621  * @kcontrol: mixer control
2622  * @ucontrol: control element information
2623  *
2624  * Callback to set the value of a double semi enumerated mixer.
2625  *
2626  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2627  * used for handling bitfield coded enumeration for example.
2628  *
2629  * Returns 0 for success.
2630  */
2631 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2632         struct snd_ctl_elem_value *ucontrol)
2633 {
2634         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2635         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2636         unsigned int val;
2637         unsigned int mask;
2638
2639         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2640                 return -EINVAL;
2641         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2642         mask = e->mask << e->shift_l;
2643         if (e->shift_l != e->shift_r) {
2644                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2645                         return -EINVAL;
2646                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2647                 mask |= e->mask << e->shift_r;
2648         }
2649
2650         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2651 }
2652 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2653
2654 /**
2655  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2656  * @kcontrol: mixer control
2657  * @uinfo: control element information
2658  *
2659  * Callback to provide information about an external enumerated
2660  * single mixer.
2661  *
2662  * Returns 0 for success.
2663  */
2664 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2665         struct snd_ctl_elem_info *uinfo)
2666 {
2667         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2668
2669         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2670         uinfo->count = 1;
2671         uinfo->value.enumerated.items = e->max;
2672
2673         if (uinfo->value.enumerated.item > e->max - 1)
2674                 uinfo->value.enumerated.item = e->max - 1;
2675         strcpy(uinfo->value.enumerated.name,
2676                 e->texts[uinfo->value.enumerated.item]);
2677         return 0;
2678 }
2679 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2680
2681 /**
2682  * snd_soc_info_volsw_ext - external single mixer info callback
2683  * @kcontrol: mixer control
2684  * @uinfo: control element information
2685  *
2686  * Callback to provide information about a single external mixer control.
2687  *
2688  * Returns 0 for success.
2689  */
2690 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2691         struct snd_ctl_elem_info *uinfo)
2692 {
2693         int max = kcontrol->private_value;
2694
2695         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2696                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2697         else
2698                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2699
2700         uinfo->count = 1;
2701         uinfo->value.integer.min = 0;
2702         uinfo->value.integer.max = max;
2703         return 0;
2704 }
2705 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2706
2707 /**
2708  * snd_soc_info_volsw - single mixer info callback
2709  * @kcontrol: mixer control
2710  * @uinfo: control element information
2711  *
2712  * Callback to provide information about a single mixer control.
2713  *
2714  * Returns 0 for success.
2715  */
2716 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2717         struct snd_ctl_elem_info *uinfo)
2718 {
2719         struct soc_mixer_control *mc =
2720                 (struct soc_mixer_control *)kcontrol->private_value;
2721         int platform_max;
2722         unsigned int shift = mc->shift;
2723         unsigned int rshift = mc->rshift;
2724
2725         if (!mc->platform_max)
2726                 mc->platform_max = mc->max;
2727         platform_max = mc->platform_max;
2728
2729         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2730                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2731         else
2732                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2733
2734         uinfo->count = shift == rshift ? 1 : 2;
2735         uinfo->value.integer.min = 0;
2736         uinfo->value.integer.max = platform_max;
2737         return 0;
2738 }
2739 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2740
2741 /**
2742  * snd_soc_get_volsw - single mixer get callback
2743  * @kcontrol: mixer control
2744  * @ucontrol: control element information
2745  *
2746  * Callback to get the value of a single mixer control.
2747  *
2748  * Returns 0 for success.
2749  */
2750 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2751         struct snd_ctl_elem_value *ucontrol)
2752 {
2753         struct soc_mixer_control *mc =
2754                 (struct soc_mixer_control *)kcontrol->private_value;
2755         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2756         unsigned int reg = mc->reg;
2757         unsigned int shift = mc->shift;
2758         unsigned int rshift = mc->rshift;
2759         int max = mc->max;
2760         unsigned int mask = (1 << fls(max)) - 1;
2761         unsigned int invert = mc->invert;
2762
2763         ucontrol->value.integer.value[0] =
2764                 (snd_soc_read(codec, reg) >> shift) & mask;
2765         if (shift != rshift)
2766                 ucontrol->value.integer.value[1] =
2767                         (snd_soc_read(codec, reg) >> rshift) & mask;
2768         if (invert) {
2769                 ucontrol->value.integer.value[0] =
2770                         max - ucontrol->value.integer.value[0];
2771                 if (shift != rshift)
2772                         ucontrol->value.integer.value[1] =
2773                                 max - ucontrol->value.integer.value[1];
2774         }
2775
2776         return 0;
2777 }
2778 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2779
2780 /**
2781  * snd_soc_put_volsw - single mixer put callback
2782  * @kcontrol: mixer control
2783  * @ucontrol: control element information
2784  *
2785  * Callback to set the value of a single mixer control.
2786  *
2787  * Returns 0 for success.
2788  */
2789 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2790         struct snd_ctl_elem_value *ucontrol)
2791 {
2792         struct soc_mixer_control *mc =
2793                 (struct soc_mixer_control *)kcontrol->private_value;
2794         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2795         unsigned int reg = mc->reg;
2796         unsigned int shift = mc->shift;
2797         unsigned int rshift = mc->rshift;
2798         int max = mc->max;
2799         unsigned int mask = (1 << fls(max)) - 1;
2800         unsigned int invert = mc->invert;
2801         unsigned int val, val2, val_mask;
2802
2803         val = (ucontrol->value.integer.value[0] & mask);
2804         if (invert)
2805                 val = max - val;
2806         val_mask = mask << shift;
2807         val = val << shift;
2808         if (shift != rshift) {
2809                 val2 = (ucontrol->value.integer.value[1] & mask);
2810                 if (invert)
2811                         val2 = max - val2;
2812                 val_mask |= mask << rshift;
2813                 val |= val2 << rshift;
2814         }
2815         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2816 }
2817 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2818
2819 /**
2820  * snd_soc_info_volsw_2r - double mixer info callback
2821  * @kcontrol: mixer control
2822  * @uinfo: control element information
2823  *
2824  * Callback to provide information about a double mixer control that
2825  * spans 2 codec registers.
2826  *
2827  * Returns 0 for success.
2828  */
2829 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2830         struct snd_ctl_elem_info *uinfo)
2831 {
2832         struct soc_mixer_control *mc =
2833                 (struct soc_mixer_control *)kcontrol->private_value;
2834         int platform_max;
2835
2836         if (!mc->platform_max)
2837                 mc->platform_max = mc->max;
2838         platform_max = mc->platform_max;
2839
2840         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2841                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2842         else
2843                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2844
2845         uinfo->count = 2;
2846         uinfo->value.integer.min = 0;
2847         uinfo->value.integer.max = platform_max;
2848         return 0;
2849 }
2850 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2851
2852 /**
2853  * snd_soc_get_volsw_2r - double mixer get callback
2854  * @kcontrol: mixer control
2855  * @ucontrol: control element information
2856  *
2857  * Callback to get the value of a double mixer control that spans 2 registers.
2858  *
2859  * Returns 0 for success.
2860  */
2861 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2862         struct snd_ctl_elem_value *ucontrol)
2863 {
2864         struct soc_mixer_control *mc =
2865                 (struct soc_mixer_control *)kcontrol->private_value;
2866         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2867         unsigned int reg = mc->reg;
2868         unsigned int reg2 = mc->rreg;
2869         unsigned int shift = mc->shift;
2870         int max = mc->max;
2871         unsigned int mask = (1 << fls(max)) - 1;
2872         unsigned int invert = mc->invert;
2873
2874         ucontrol->value.integer.value[0] =
2875                 (snd_soc_read(codec, reg) >> shift) & mask;
2876         ucontrol->value.integer.value[1] =
2877                 (snd_soc_read(codec, reg2) >> shift) & mask;
2878         if (invert) {
2879                 ucontrol->value.integer.value[0] =
2880                         max - ucontrol->value.integer.value[0];
2881                 ucontrol->value.integer.value[1] =
2882                         max - ucontrol->value.integer.value[1];
2883         }
2884
2885         return 0;
2886 }
2887 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2888
2889 /**
2890  * snd_soc_put_volsw_2r - double mixer set callback
2891  * @kcontrol: mixer control
2892  * @ucontrol: control element information
2893  *
2894  * Callback to set the value of a double mixer control that spans 2 registers.
2895  *
2896  * Returns 0 for success.
2897  */
2898 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2899         struct snd_ctl_elem_value *ucontrol)
2900 {
2901         struct soc_mixer_control *mc =
2902                 (struct soc_mixer_control *)kcontrol->private_value;
2903         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2904         unsigned int reg = mc->reg;
2905         unsigned int reg2 = mc->rreg;
2906         unsigned int shift = mc->shift;
2907         int max = mc->max;
2908         unsigned int mask = (1 << fls(max)) - 1;
2909         unsigned int invert = mc->invert;
2910         int err;
2911         unsigned int val, val2, val_mask;
2912
2913         val_mask = mask << shift;
2914         val = (ucontrol->value.integer.value[0] & mask);
2915         val2 = (ucontrol->value.integer.value[1] & mask);
2916
2917         if (invert) {
2918                 val = max - val;
2919                 val2 = max - val2;
2920         }
2921
2922         val = val << shift;
2923         val2 = val2 << shift;
2924
2925         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2926         if (err < 0)
2927                 return err;
2928
2929         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2930         return err;
2931 }
2932 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2933
2934 /**
2935  * snd_soc_info_volsw_s8 - signed mixer info callback
2936  * @kcontrol: mixer control
2937  * @uinfo: control element information
2938  *
2939  * Callback to provide information about a signed mixer control.
2940  *
2941  * Returns 0 for success.
2942  */
2943 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2944         struct snd_ctl_elem_info *uinfo)
2945 {
2946         struct soc_mixer_control *mc =
2947                 (struct soc_mixer_control *)kcontrol->private_value;
2948         int platform_max;
2949         int min = mc->min;
2950
2951         if (!mc->platform_max)
2952                 mc->platform_max = mc->max;
2953         platform_max = mc->platform_max;
2954
2955         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2956         uinfo->count = 2;
2957         uinfo->value.integer.min = 0;
2958         uinfo->value.integer.max = platform_max - min;
2959         return 0;
2960 }
2961 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2962
2963 /**
2964  * snd_soc_get_volsw_s8 - signed mixer get callback
2965  * @kcontrol: mixer control
2966  * @ucontrol: control element information
2967  *
2968  * Callback to get the value of a signed mixer control.
2969  *
2970  * Returns 0 for success.
2971  */
2972 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2973         struct snd_ctl_elem_value *ucontrol)
2974 {
2975         struct soc_mixer_control *mc =
2976                 (struct soc_mixer_control *)kcontrol->private_value;
2977         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2978         unsigned int reg = mc->reg;
2979         int min = mc->min;
2980         int val = snd_soc_read(codec, reg);
2981
2982         ucontrol->value.integer.value[0] =
2983                 ((signed char)(val & 0xff))-min;
2984         ucontrol->value.integer.value[1] =
2985                 ((signed char)((val >> 8) & 0xff))-min;
2986         return 0;
2987 }
2988 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2989
2990 /**
2991  * snd_soc_put_volsw_sgn - signed mixer put callback
2992  * @kcontrol: mixer control
2993  * @ucontrol: control element information
2994  *
2995  * Callback to set the value of a signed mixer control.
2996  *
2997  * Returns 0 for success.
2998  */
2999 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
3000         struct snd_ctl_elem_value *ucontrol)
3001 {
3002         struct soc_mixer_control *mc =
3003                 (struct soc_mixer_control *)kcontrol->private_value;
3004         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3005         unsigned int reg = mc->reg;
3006         int min = mc->min;
3007         unsigned int val;
3008
3009         val = (ucontrol->value.integer.value[0]+min) & 0xff;
3010         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3011
3012         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3013 }
3014 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3015
3016 /**
3017  * snd_soc_limit_volume - Set new limit to an existing volume control.
3018  *
3019  * @codec: where to look for the control
3020  * @name: Name of the control
3021  * @max: new maximum limit
3022  *
3023  * Return 0 for success, else error.
3024  */
3025 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3026         const char *name, int max)
3027 {
3028         struct snd_card *card = codec->card->snd_card;
3029         struct snd_kcontrol *kctl;
3030         struct soc_mixer_control *mc;
3031         int found = 0;
3032         int ret = -EINVAL;
3033
3034         /* Sanity check for name and max */
3035         if (unlikely(!name || max <= 0))
3036                 return -EINVAL;
3037
3038         list_for_each_entry(kctl, &card->controls, list) {
3039                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3040                         found = 1;
3041                         break;
3042                 }
3043         }
3044         if (found) {
3045                 mc = (struct soc_mixer_control *)kctl->private_value;
3046                 if (max <= mc->max) {
3047                         mc->platform_max = max;
3048                         ret = 0;
3049                 }
3050         }
3051         return ret;
3052 }
3053 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3054
3055 /**
3056  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
3057  *  mixer info callback
3058  * @kcontrol: mixer control
3059  * @uinfo: control element information
3060  *
3061  * Returns 0 for success.
3062  */
3063 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3064                         struct snd_ctl_elem_info *uinfo)
3065 {
3066         struct soc_mixer_control *mc =
3067                 (struct soc_mixer_control *)kcontrol->private_value;
3068         int max = mc->max;
3069         int min = mc->min;
3070
3071         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3072         uinfo->count = 2;
3073         uinfo->value.integer.min = 0;
3074         uinfo->value.integer.max = max-min;
3075
3076         return 0;
3077 }
3078 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3079
3080 /**
3081  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3082  *  mixer get callback
3083  * @kcontrol: mixer control
3084  * @uinfo: control element information
3085  *
3086  * Returns 0 for success.
3087  */
3088 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3089                         struct snd_ctl_elem_value *ucontrol)
3090 {
3091         struct soc_mixer_control *mc =
3092                 (struct soc_mixer_control *)kcontrol->private_value;
3093         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3094         unsigned int mask = (1<<mc->shift)-1;
3095         int min = mc->min;
3096         int val = snd_soc_read(codec, mc->reg) & mask;
3097         int valr = snd_soc_read(codec, mc->rreg) & mask;
3098
3099         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3100         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3101         return 0;
3102 }
3103 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3104
3105 /**
3106  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3107  *  mixer put callback
3108  * @kcontrol: mixer control
3109  * @uinfo: control element information
3110  *
3111  * Returns 0 for success.
3112  */
3113 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3114                         struct snd_ctl_elem_value *ucontrol)
3115 {
3116         struct soc_mixer_control *mc =
3117                 (struct soc_mixer_control *)kcontrol->private_value;
3118         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3119         unsigned int mask = (1<<mc->shift)-1;
3120         int min = mc->min;
3121         int ret;
3122         unsigned int val, valr, oval, ovalr;
3123
3124         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3125         val &= mask;
3126         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3127         valr &= mask;
3128
3129         oval = snd_soc_read(codec, mc->reg) & mask;
3130         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3131
3132         ret = 0;
3133         if (oval != val) {
3134                 ret = snd_soc_write(codec, mc->reg, val);
3135                 if (ret < 0)
3136                         return ret;
3137         }
3138         if (ovalr != valr) {
3139                 ret = snd_soc_write(codec, mc->rreg, valr);
3140                 if (ret < 0)
3141                         return ret;
3142         }
3143
3144         return 0;
3145 }
3146 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3147
3148 /**
3149  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3150  * @dai: DAI
3151  * @clk_id: DAI specific clock ID
3152  * @freq: new clock frequency in Hz
3153  * @dir: new clock direction - input/output.
3154  *
3155  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3156  */
3157 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3158         unsigned int freq, int dir)
3159 {
3160         if (dai->driver && dai->driver->ops->set_sysclk)
3161                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3162         else if (dai->codec && dai->codec->driver->set_sysclk)
3163                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3164                                                       freq, dir);
3165         else
3166                 return -EINVAL;
3167 }
3168 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3169
3170 /**
3171  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3172  * @codec: CODEC
3173  * @clk_id: DAI specific clock ID
3174  * @freq: new clock frequency in Hz
3175  * @dir: new clock direction - input/output.
3176  *
3177  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3178  */
3179 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3180         unsigned int freq, int dir)
3181 {
3182         if (codec->driver->set_sysclk)
3183                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3184         else
3185                 return -EINVAL;
3186 }
3187 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3188
3189 /**
3190  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3191  * @dai: DAI
3192  * @div_id: DAI specific clock divider ID
3193  * @div: new clock divisor.
3194  *
3195  * Configures the clock dividers. This is used to derive the best DAI bit and
3196  * frame clocks from the system or master clock. It's best to set the DAI bit
3197  * and frame clocks as low as possible to save system power.
3198  */
3199 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3200         int div_id, int div)
3201 {
3202         if (dai->driver && dai->driver->ops->set_clkdiv)
3203                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3204         else
3205                 return -EINVAL;
3206 }
3207 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3208
3209 /**
3210  * snd_soc_dai_set_pll - configure DAI PLL.
3211  * @dai: DAI
3212  * @pll_id: DAI specific PLL ID
3213  * @source: DAI specific source for the PLL
3214  * @freq_in: PLL input clock frequency in Hz
3215  * @freq_out: requested PLL output clock frequency in Hz
3216  *
3217  * Configures and enables PLL to generate output clock based on input clock.
3218  */
3219 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3220         unsigned int freq_in, unsigned int freq_out)
3221 {
3222         if (dai->driver && dai->driver->ops->set_pll)
3223                 return dai->driver->ops->set_pll(dai, pll_id, source,
3224                                          freq_in, freq_out);
3225         else if (dai->codec && dai->codec->driver->set_pll)
3226                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3227                                                    freq_in, freq_out);
3228         else
3229                 return -EINVAL;
3230 }
3231 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3232
3233 /*
3234  * snd_soc_codec_set_pll - configure codec PLL.
3235  * @codec: CODEC
3236  * @pll_id: DAI specific PLL ID
3237  * @source: DAI specific source for the PLL
3238  * @freq_in: PLL input clock frequency in Hz
3239  * @freq_out: requested PLL output clock frequency in Hz
3240  *
3241  * Configures and enables PLL to generate output clock based on input clock.
3242  */
3243 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3244                           unsigned int freq_in, unsigned int freq_out)
3245 {
3246         if (codec->driver->set_pll)
3247                 return codec->driver->set_pll(codec, pll_id, source,
3248                                               freq_in, freq_out);
3249         else
3250                 return -EINVAL;
3251 }
3252 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3253
3254 /**
3255  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3256  * @dai: DAI
3257  * @fmt: SND_SOC_DAIFMT_ format value.
3258  *
3259  * Configures the DAI hardware format and clocking.
3260  */
3261 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3262 {
3263         if (dai->driver && dai->driver->ops->set_fmt)
3264                 return dai->driver->ops->set_fmt(dai, fmt);
3265         else
3266                 return -EINVAL;
3267 }
3268 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3269
3270 /**
3271  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3272  * @dai: DAI
3273  * @tx_mask: bitmask representing active TX slots.
3274  * @rx_mask: bitmask representing active RX slots.
3275  * @slots: Number of slots in use.
3276  * @slot_width: Width in bits for each slot.
3277  *
3278  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3279  * specific.
3280  */
3281 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3282         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3283 {
3284         if (dai->driver && dai->driver->ops->set_tdm_slot)
3285                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3286                                 slots, slot_width);
3287         else
3288                 return -EINVAL;
3289 }
3290 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3291
3292 /**
3293  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3294  * @dai: DAI
3295  * @tx_num: how many TX channels
3296  * @tx_slot: pointer to an array which imply the TX slot number channel
3297  *           0~num-1 uses
3298  * @rx_num: how many RX channels
3299  * @rx_slot: pointer to an array which imply the RX slot number channel
3300  *           0~num-1 uses
3301  *
3302  * configure the relationship between channel number and TDM slot number.
3303  */
3304 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3305         unsigned int tx_num, unsigned int *tx_slot,
3306         unsigned int rx_num, unsigned int *rx_slot)
3307 {
3308         if (dai->driver && dai->driver->ops->set_channel_map)
3309                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3310                         rx_num, rx_slot);
3311         else
3312                 return -EINVAL;
3313 }
3314 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3315
3316 /**
3317  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3318  * @dai: DAI
3319  * @tristate: tristate enable
3320  *
3321  * Tristates the DAI so that others can use it.
3322  */
3323 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3324 {
3325         if (dai->driver && dai->driver->ops->set_tristate)
3326                 return dai->driver->ops->set_tristate(dai, tristate);
3327         else
3328                 return -EINVAL;
3329 }
3330 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3331
3332 /**
3333  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3334  * @dai: DAI
3335  * @mute: mute enable
3336  *
3337  * Mutes the DAI DAC.
3338  */
3339 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3340 {
3341         if (dai->driver && dai->driver->ops->digital_mute)
3342                 return dai->driver->ops->digital_mute(dai, mute);
3343         else
3344                 return -EINVAL;
3345 }
3346 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3347
3348 /**
3349  * snd_soc_register_card - Register a card with the ASoC core
3350  *
3351  * @card: Card to register
3352  *
3353  */
3354 int snd_soc_register_card(struct snd_soc_card *card)
3355 {
3356         int i;
3357
3358         if (!card->name || !card->dev)
3359                 return -EINVAL;
3360
3361         dev_set_drvdata(card->dev, card);
3362
3363         snd_soc_initialize_card_lists(card);
3364
3365         soc_init_card_debugfs(card);
3366
3367         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3368                             (card->num_links + card->num_aux_devs),
3369                             GFP_KERNEL);
3370         if (card->rtd == NULL)
3371                 return -ENOMEM;
3372         card->rtd_aux = &card->rtd[card->num_links];
3373
3374         for (i = 0; i < card->num_links; i++)
3375                 card->rtd[i].dai_link = &card->dai_link[i];
3376
3377         INIT_LIST_HEAD(&card->list);
3378         card->instantiated = 0;
3379         mutex_init(&card->mutex);
3380
3381         mutex_lock(&client_mutex);
3382         list_add(&card->list, &card_list);
3383         snd_soc_instantiate_cards();
3384         mutex_unlock(&client_mutex);
3385
3386         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3387
3388         return 0;
3389 }
3390 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3391
3392 /**
3393  * snd_soc_unregister_card - Unregister a card with the ASoC core
3394  *
3395  * @card: Card to unregister
3396  *
3397  */
3398 int snd_soc_unregister_card(struct snd_soc_card *card)
3399 {
3400         if (card->instantiated)
3401                 soc_cleanup_card_resources(card);
3402         mutex_lock(&client_mutex);
3403         list_del(&card->list);
3404         mutex_unlock(&client_mutex);
3405         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3406
3407         return 0;
3408 }
3409 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3410
3411 /*
3412  * Simplify DAI link configuration by removing ".-1" from device names
3413  * and sanitizing names.
3414  */
3415 static char *fmt_single_name(struct device *dev, int *id)
3416 {
3417         char *found, name[NAME_SIZE];
3418         int id1, id2;
3419
3420         if (dev_name(dev) == NULL)
3421                 return NULL;
3422
3423         strlcpy(name, dev_name(dev), NAME_SIZE);
3424
3425         /* are we a "%s.%d" name (platform and SPI components) */
3426         found = strstr(name, dev->driver->name);
3427         if (found) {
3428                 /* get ID */
3429                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3430
3431                         /* discard ID from name if ID == -1 */
3432                         if (*id == -1)
3433                                 found[strlen(dev->driver->name)] = '\0';
3434                 }
3435
3436         } else {
3437                 /* I2C component devices are named "bus-addr"  */
3438                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3439                         char tmp[NAME_SIZE];
3440
3441                         /* create unique ID number from I2C addr and bus */
3442                         *id = ((id1 & 0xffff) << 16) + id2;
3443
3444                         /* sanitize component name for DAI link creation */
3445                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3446                         strlcpy(name, tmp, NAME_SIZE);
3447                 } else
3448                         *id = 0;
3449         }
3450
3451         return kstrdup(name, GFP_KERNEL);
3452 }
3453
3454 /*
3455  * Simplify DAI link naming for single devices with multiple DAIs by removing
3456  * any ".-1" and using the DAI name (instead of device name).
3457  */
3458 static inline char *fmt_multiple_name(struct device *dev,
3459                 struct snd_soc_dai_driver *dai_drv)
3460 {
3461         if (dai_drv->name == NULL) {
3462                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3463                                 dev_name(dev));
3464                 return NULL;
3465         }
3466
3467         return kstrdup(dai_drv->name, GFP_KERNEL);
3468 }
3469
3470 /**
3471  * snd_soc_register_dai - Register a DAI with the ASoC core
3472  *
3473  * @dai: DAI to register
3474  */
3475 int snd_soc_register_dai(struct device *dev,
3476                 struct snd_soc_dai_driver *dai_drv)
3477 {
3478         struct snd_soc_dai *dai;
3479
3480         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3481
3482         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3483         if (dai == NULL)
3484                 return -ENOMEM;
3485
3486         /* create DAI component name */
3487         dai->name = fmt_single_name(dev, &dai->id);
3488         if (dai->name == NULL) {
3489                 kfree(dai);
3490                 return -ENOMEM;
3491         }
3492
3493         dai->dev = dev;
3494         dai->driver = dai_drv;
3495         if (!dai->driver->ops)
3496                 dai->driver->ops = &null_dai_ops;
3497
3498         mutex_lock(&client_mutex);
3499         list_add(&dai->list, &dai_list);
3500         snd_soc_instantiate_cards();
3501         mutex_unlock(&client_mutex);
3502
3503         pr_debug("Registered DAI '%s'\n", dai->name);
3504
3505         return 0;
3506 }
3507 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3508
3509 /**
3510  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3511  *
3512  * @dai: DAI to unregister
3513  */
3514 void snd_soc_unregister_dai(struct device *dev)
3515 {
3516         struct snd_soc_dai *dai;
3517
3518         list_for_each_entry(dai, &dai_list, list) {
3519                 if (dev == dai->dev)
3520                         goto found;
3521         }
3522         return;
3523
3524 found:
3525         mutex_lock(&client_mutex);
3526         list_del(&dai->list);
3527         mutex_unlock(&client_mutex);
3528
3529         pr_debug("Unregistered DAI '%s'\n", dai->name);
3530         kfree(dai->name);
3531         kfree(dai);
3532 }
3533 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3534
3535 /**
3536  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3537  *
3538  * @dai: Array of DAIs to register
3539  * @count: Number of DAIs
3540  */
3541 int snd_soc_register_dais(struct device *dev,
3542                 struct snd_soc_dai_driver *dai_drv, size_t count)
3543 {
3544         struct snd_soc_dai *dai;
3545         int i, ret = 0;
3546
3547         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3548
3549         for (i = 0; i < count; i++) {
3550
3551                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3552                 if (dai == NULL) {
3553                         ret = -ENOMEM;
3554                         goto err;
3555                 }
3556
3557                 /* create DAI component name */
3558                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3559                 if (dai->name == NULL) {
3560                         kfree(dai);
3561                         ret = -EINVAL;
3562                         goto err;
3563                 }
3564
3565                 dai->dev = dev;
3566                 dai->driver = &dai_drv[i];
3567                 if (dai->driver->id)
3568                         dai->id = dai->driver->id;
3569                 else
3570                         dai->id = i;
3571                 if (!dai->driver->ops)
3572                         dai->driver->ops = &null_dai_ops;
3573
3574                 mutex_lock(&client_mutex);
3575                 list_add(&dai->list, &dai_list);
3576                 mutex_unlock(&client_mutex);
3577
3578                 pr_debug("Registered DAI '%s'\n", dai->name);
3579         }
3580
3581         mutex_lock(&client_mutex);
3582         snd_soc_instantiate_cards();
3583         mutex_unlock(&client_mutex);
3584         return 0;
3585
3586 err:
3587         for (i--; i >= 0; i--)
3588                 snd_soc_unregister_dai(dev);
3589
3590         return ret;
3591 }
3592 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3593
3594 /**
3595  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3596  *
3597  * @dai: Array of DAIs to unregister
3598  * @count: Number of DAIs
3599  */
3600 void snd_soc_unregister_dais(struct device *dev, size_t count)
3601 {
3602         int i;
3603
3604         for (i = 0; i < count; i++)
3605                 snd_soc_unregister_dai(dev);
3606 }
3607 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3608
3609 /**
3610  * snd_soc_register_platform - Register a platform with the ASoC core
3611  *
3612  * @platform: platform to register
3613  */
3614 int snd_soc_register_platform(struct device *dev,
3615                 struct snd_soc_platform_driver *platform_drv)
3616 {
3617         struct snd_soc_platform *platform;
3618
3619         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3620
3621         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3622         if (platform == NULL)
3623                 return -ENOMEM;
3624
3625         /* create platform component name */
3626         platform->name = fmt_single_name(dev, &platform->id);
3627         if (platform->name == NULL) {
3628                 kfree(platform);
3629                 return -ENOMEM;
3630         }
3631
3632         platform->dev = dev;
3633         platform->driver = platform_drv;
3634
3635         mutex_lock(&client_mutex);
3636         list_add(&platform->list, &platform_list);
3637         snd_soc_instantiate_cards();
3638         mutex_unlock(&client_mutex);
3639
3640         pr_debug("Registered platform '%s'\n", platform->name);
3641
3642         return 0;
3643 }
3644 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3645
3646 /**
3647  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3648  *
3649  * @platform: platform to unregister
3650  */
3651 void snd_soc_unregister_platform(struct device *dev)
3652 {
3653         struct snd_soc_platform *platform;
3654
3655         list_for_each_entry(platform, &platform_list, list) {
3656                 if (dev == platform->dev)
3657                         goto found;
3658         }
3659         return;
3660
3661 found:
3662         mutex_lock(&client_mutex);
3663         list_del(&platform->list);
3664         mutex_unlock(&client_mutex);
3665
3666         pr_debug("Unregistered platform '%s'\n", platform->name);
3667         kfree(platform->name);
3668         kfree(platform);
3669 }
3670 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3671
3672 static u64 codec_format_map[] = {
3673         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3674         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3675         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3676         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3677         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3678         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3679         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3680         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3681         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3682         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3683         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3684         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3685         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3686         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3687         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3688         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3689 };
3690
3691 /* Fix up the DAI formats for endianness: codecs don't actually see
3692  * the endianness of the data but we're using the CPU format
3693  * definitions which do need to include endianness so we ensure that
3694  * codec DAIs always have both big and little endian variants set.
3695  */
3696 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3697 {
3698         int i;
3699
3700         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3701                 if (stream->formats & codec_format_map[i])
3702                         stream->formats |= codec_format_map[i];
3703 }
3704
3705 /**
3706  * snd_soc_register_codec - Register a codec with the ASoC core
3707  *
3708  * @codec: codec to register
3709  */
3710 int snd_soc_register_codec(struct device *dev,
3711                            const struct snd_soc_codec_driver *codec_drv,
3712                            struct snd_soc_dai_driver *dai_drv,
3713                            int num_dai)
3714 {
3715         size_t reg_size;
3716         struct snd_soc_codec *codec;
3717         int ret, i;
3718
3719         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3720
3721         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3722         if (codec == NULL)
3723                 return -ENOMEM;
3724
3725         /* create CODEC component name */
3726         codec->name = fmt_single_name(dev, &codec->id);
3727         if (codec->name == NULL) {
3728                 kfree(codec);
3729                 return -ENOMEM;
3730         }
3731
3732         if (codec_drv->compress_type)
3733                 codec->compress_type = codec_drv->compress_type;
3734         else
3735                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3736
3737         codec->write = codec_drv->write;
3738         codec->read = codec_drv->read;
3739         codec->volatile_register = codec_drv->volatile_register;
3740         codec->readable_register = codec_drv->readable_register;
3741         codec->writable_register = codec_drv->writable_register;
3742         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3743         codec->dapm.dev = dev;
3744         codec->dapm.codec = codec;
3745         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3746         codec->dev = dev;
3747         codec->driver = codec_drv;
3748         codec->num_dai = num_dai;
3749         mutex_init(&codec->mutex);
3750
3751         /* allocate CODEC register cache */
3752         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3753                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3754                 codec->reg_size = reg_size;
3755                 /* it is necessary to make a copy of the default register cache
3756                  * because in the case of using a compression type that requires
3757                  * the default register cache to be marked as __devinitconst the
3758                  * kernel might have freed the array by the time we initialize
3759                  * the cache.
3760                  */
3761                 if (codec_drv->reg_cache_default) {
3762                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3763                                                       reg_size, GFP_KERNEL);
3764                         if (!codec->reg_def_copy) {
3765                                 ret = -ENOMEM;
3766                                 goto fail;
3767                         }
3768                 }
3769         }
3770
3771         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3772                 if (!codec->volatile_register)
3773                         codec->volatile_register = snd_soc_default_volatile_register;
3774                 if (!codec->readable_register)
3775                         codec->readable_register = snd_soc_default_readable_register;
3776                 if (!codec->writable_register)
3777                         codec->writable_register = snd_soc_default_writable_register;
3778         }
3779
3780         for (i = 0; i < num_dai; i++) {
3781                 fixup_codec_formats(&dai_drv[i].playback);
3782                 fixup_codec_formats(&dai_drv[i].capture);
3783         }
3784
3785         /* register any DAIs */
3786         if (num_dai) {
3787                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3788                 if (ret < 0)
3789                         goto fail;
3790         }
3791
3792         mutex_lock(&client_mutex);
3793         list_add(&codec->list, &codec_list);
3794         snd_soc_instantiate_cards();
3795         mutex_unlock(&client_mutex);
3796
3797         pr_debug("Registered codec '%s'\n", codec->name);
3798         return 0;
3799
3800 fail:
3801         kfree(codec->reg_def_copy);
3802         codec->reg_def_copy = NULL;
3803         kfree(codec->name);
3804         kfree(codec);
3805         return ret;
3806 }
3807 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3808
3809 /**
3810  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3811  *
3812  * @codec: codec to unregister
3813  */
3814 void snd_soc_unregister_codec(struct device *dev)
3815 {
3816         struct snd_soc_codec *codec;
3817         int i;
3818
3819         list_for_each_entry(codec, &codec_list, list) {
3820                 if (dev == codec->dev)
3821                         goto found;
3822         }
3823         return;
3824
3825 found:
3826         if (codec->num_dai)
3827                 for (i = 0; i < codec->num_dai; i++)
3828                         snd_soc_unregister_dai(dev);
3829
3830         mutex_lock(&client_mutex);
3831         list_del(&codec->list);
3832         mutex_unlock(&client_mutex);
3833
3834         pr_debug("Unregistered codec '%s'\n", codec->name);
3835
3836         snd_soc_cache_exit(codec);
3837         kfree(codec->reg_def_copy);
3838         kfree(codec->name);
3839         kfree(codec);
3840 }
3841 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3842
3843 static int __init snd_soc_init(void)
3844 {
3845 #ifdef CONFIG_DEBUG_FS
3846         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3847         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3848                 printk(KERN_WARNING
3849                        "ASoC: Failed to create debugfs directory\n");
3850                 snd_soc_debugfs_root = NULL;
3851         }
3852
3853         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3854                                  &codec_list_fops))
3855                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3856
3857         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3858                                  &dai_list_fops))
3859                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3860
3861         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3862                                  &platform_list_fops))
3863                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3864 #endif
3865
3866         snd_soc_util_init();
3867
3868         return platform_driver_register(&soc_driver);
3869 }
3870 module_init(snd_soc_init);
3871
3872 static void __exit snd_soc_exit(void)
3873 {
3874         snd_soc_util_exit();
3875
3876 #ifdef CONFIG_DEBUG_FS
3877         debugfs_remove_recursive(snd_soc_debugfs_root);
3878 #endif
3879         platform_driver_unregister(&soc_driver);
3880 }
3881 module_exit(snd_soc_exit);
3882
3883 /* Module information */
3884 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3885 MODULE_DESCRIPTION("ALSA SoC Core");
3886 MODULE_LICENSE("GPL");
3887 MODULE_ALIAS("platform:soc-audio");