ath9k_hw: don't touch with treewide double semicolon removal
[cascardo/linux.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 = codec->driver->reg_word_size * 2;
96         int regsize = min_bytes_needed(codec->driver->reg_cache_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 = codec->driver->reg_word_size * 2;
136         regsize = min_bytes_needed(codec->driver->reg_cache_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         if ((reg >= codec->driver->reg_cache_size) || (reg % step))
263                 return -EINVAL;
264         while (*start == ' ')
265                 start++;
266         if (strict_strtoul(start, 16, &value))
267                 return -EINVAL;
268
269         /* Userspace has been fiddling around behind the kernel's back */
270         add_taint(TAINT_USER);
271
272         snd_soc_write(codec, reg, value);
273         return buf_size;
274 }
275
276 static const struct file_operations codec_reg_fops = {
277         .open = codec_reg_open_file,
278         .read = codec_reg_read_file,
279         .write = codec_reg_write_file,
280         .llseek = default_llseek,
281 };
282
283 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
284 {
285         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
286
287         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
288                                                        debugfs_card_root);
289         if (!codec->debugfs_codec_root) {
290                 printk(KERN_WARNING
291                        "ASoC: Failed to create codec debugfs directory\n");
292                 return;
293         }
294
295         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
296                             &codec->cache_sync);
297         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
298                             &codec->cache_only);
299
300         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
301                                                  codec->debugfs_codec_root,
302                                                  codec, &codec_reg_fops);
303         if (!codec->debugfs_reg)
304                 printk(KERN_WARNING
305                        "ASoC: Failed to create codec register debugfs file\n");
306
307         codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
308                                                  codec->debugfs_codec_root);
309         if (!codec->dapm.debugfs_dapm)
310                 printk(KERN_WARNING
311                        "Failed to create DAPM debugfs directory\n");
312
313         snd_soc_dapm_debugfs_init(&codec->dapm);
314 }
315
316 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
317 {
318         debugfs_remove_recursive(codec->debugfs_codec_root);
319 }
320
321 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
322                                     size_t count, loff_t *ppos)
323 {
324         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
325         ssize_t len, ret = 0;
326         struct snd_soc_codec *codec;
327
328         if (!buf)
329                 return -ENOMEM;
330
331         list_for_each_entry(codec, &codec_list, list) {
332                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
333                                codec->name);
334                 if (len >= 0)
335                         ret += len;
336                 if (ret > PAGE_SIZE) {
337                         ret = PAGE_SIZE;
338                         break;
339                 }
340         }
341
342         if (ret >= 0)
343                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
344
345         kfree(buf);
346
347         return ret;
348 }
349
350 static const struct file_operations codec_list_fops = {
351         .read = codec_list_read_file,
352         .llseek = default_llseek,/* read accesses f_pos */
353 };
354
355 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
356                                   size_t count, loff_t *ppos)
357 {
358         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
359         ssize_t len, ret = 0;
360         struct snd_soc_dai *dai;
361
362         if (!buf)
363                 return -ENOMEM;
364
365         list_for_each_entry(dai, &dai_list, list) {
366                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
367                 if (len >= 0)
368                         ret += len;
369                 if (ret > PAGE_SIZE) {
370                         ret = PAGE_SIZE;
371                         break;
372                 }
373         }
374
375         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
376
377         kfree(buf);
378
379         return ret;
380 }
381
382 static const struct file_operations dai_list_fops = {
383         .read = dai_list_read_file,
384         .llseek = default_llseek,/* read accesses f_pos */
385 };
386
387 static ssize_t platform_list_read_file(struct file *file,
388                                        char __user *user_buf,
389                                        size_t count, loff_t *ppos)
390 {
391         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
392         ssize_t len, ret = 0;
393         struct snd_soc_platform *platform;
394
395         if (!buf)
396                 return -ENOMEM;
397
398         list_for_each_entry(platform, &platform_list, list) {
399                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
400                                platform->name);
401                 if (len >= 0)
402                         ret += len;
403                 if (ret > PAGE_SIZE) {
404                         ret = PAGE_SIZE;
405                         break;
406                 }
407         }
408
409         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
410
411         kfree(buf);
412
413         return ret;
414 }
415
416 static const struct file_operations platform_list_fops = {
417         .read = platform_list_read_file,
418         .llseek = default_llseek,/* read accesses f_pos */
419 };
420
421 static void soc_init_card_debugfs(struct snd_soc_card *card)
422 {
423         card->debugfs_card_root = debugfs_create_dir(card->name,
424                                                      snd_soc_debugfs_root);
425         if (!card->debugfs_card_root) {
426                 dev_warn(card->dev,
427                          "ASoC: Failed to create codec debugfs directory\n");
428                 return;
429         }
430
431         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
432                                                     card->debugfs_card_root,
433                                                     &card->pop_time);
434         if (!card->debugfs_pop_time)
435                 dev_warn(card->dev,
436                        "Failed to create pop time debugfs file\n");
437 }
438
439 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
440 {
441         debugfs_remove_recursive(card->debugfs_card_root);
442 }
443
444 #else
445
446 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
447 {
448 }
449
450 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
451 {
452 }
453
454 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
455 {
456 }
457
458 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
459 {
460 }
461 #endif
462
463 #ifdef CONFIG_SND_SOC_AC97_BUS
464 /* unregister ac97 codec */
465 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
466 {
467         if (codec->ac97->dev.bus)
468                 device_unregister(&codec->ac97->dev);
469         return 0;
470 }
471
472 /* stop no dev release warning */
473 static void soc_ac97_device_release(struct device *dev){}
474
475 /* register ac97 codec to bus */
476 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
477 {
478         int err;
479
480         codec->ac97->dev.bus = &ac97_bus_type;
481         codec->ac97->dev.parent = codec->card->dev;
482         codec->ac97->dev.release = soc_ac97_device_release;
483
484         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
485                      codec->card->snd_card->number, 0, codec->name);
486         err = device_register(&codec->ac97->dev);
487         if (err < 0) {
488                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
489                 codec->ac97->dev.bus = NULL;
490                 return err;
491         }
492         return 0;
493 }
494 #endif
495
496 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
497 {
498         struct snd_soc_pcm_runtime *rtd = substream->private_data;
499         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
500         struct snd_soc_dai *codec_dai = rtd->codec_dai;
501         int ret;
502
503         if (!codec_dai->driver->symmetric_rates &&
504             !cpu_dai->driver->symmetric_rates &&
505             !rtd->dai_link->symmetric_rates)
506                 return 0;
507
508         /* This can happen if multiple streams are starting simultaneously -
509          * the second can need to get its constraints before the first has
510          * picked a rate.  Complain and allow the application to carry on.
511          */
512         if (!rtd->rate) {
513                 dev_warn(&rtd->dev,
514                          "Not enforcing symmetric_rates due to race\n");
515                 return 0;
516         }
517
518         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
519
520         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
521                                            SNDRV_PCM_HW_PARAM_RATE,
522                                            rtd->rate, rtd->rate);
523         if (ret < 0) {
524                 dev_err(&rtd->dev,
525                         "Unable to apply rate symmetry constraint: %d\n", ret);
526                 return ret;
527         }
528
529         return 0;
530 }
531
532 /*
533  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
534  * then initialized and any private data can be allocated. This also calls
535  * startup for the cpu DAI, platform, machine and codec DAI.
536  */
537 static int soc_pcm_open(struct snd_pcm_substream *substream)
538 {
539         struct snd_soc_pcm_runtime *rtd = substream->private_data;
540         struct snd_pcm_runtime *runtime = substream->runtime;
541         struct snd_soc_platform *platform = rtd->platform;
542         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
543         struct snd_soc_dai *codec_dai = rtd->codec_dai;
544         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
545         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
546         int ret = 0;
547
548         mutex_lock(&pcm_mutex);
549
550         /* startup the audio subsystem */
551         if (cpu_dai->driver->ops->startup) {
552                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
553                 if (ret < 0) {
554                         printk(KERN_ERR "asoc: can't open interface %s\n",
555                                 cpu_dai->name);
556                         goto out;
557                 }
558         }
559
560         if (platform->driver->ops->open) {
561                 ret = platform->driver->ops->open(substream);
562                 if (ret < 0) {
563                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
564                         goto platform_err;
565                 }
566         }
567
568         if (codec_dai->driver->ops->startup) {
569                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
570                 if (ret < 0) {
571                         printk(KERN_ERR "asoc: can't open codec %s\n",
572                                 codec_dai->name);
573                         goto codec_dai_err;
574                 }
575         }
576
577         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
578                 ret = rtd->dai_link->ops->startup(substream);
579                 if (ret < 0) {
580                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
581                         goto machine_err;
582                 }
583         }
584
585         /* Check that the codec and cpu DAIs are compatible */
586         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
587                 runtime->hw.rate_min =
588                         max(codec_dai_drv->playback.rate_min,
589                             cpu_dai_drv->playback.rate_min);
590                 runtime->hw.rate_max =
591                         min(codec_dai_drv->playback.rate_max,
592                             cpu_dai_drv->playback.rate_max);
593                 runtime->hw.channels_min =
594                         max(codec_dai_drv->playback.channels_min,
595                                 cpu_dai_drv->playback.channels_min);
596                 runtime->hw.channels_max =
597                         min(codec_dai_drv->playback.channels_max,
598                                 cpu_dai_drv->playback.channels_max);
599                 runtime->hw.formats =
600                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
601                 runtime->hw.rates =
602                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
603                 if (codec_dai_drv->playback.rates
604                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
605                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
606                 if (cpu_dai_drv->playback.rates
607                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
608                         runtime->hw.rates |= codec_dai_drv->playback.rates;
609         } else {
610                 runtime->hw.rate_min =
611                         max(codec_dai_drv->capture.rate_min,
612                             cpu_dai_drv->capture.rate_min);
613                 runtime->hw.rate_max =
614                         min(codec_dai_drv->capture.rate_max,
615                             cpu_dai_drv->capture.rate_max);
616                 runtime->hw.channels_min =
617                         max(codec_dai_drv->capture.channels_min,
618                                 cpu_dai_drv->capture.channels_min);
619                 runtime->hw.channels_max =
620                         min(codec_dai_drv->capture.channels_max,
621                                 cpu_dai_drv->capture.channels_max);
622                 runtime->hw.formats =
623                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
624                 runtime->hw.rates =
625                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
626                 if (codec_dai_drv->capture.rates
627                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
628                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
629                 if (cpu_dai_drv->capture.rates
630                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
631                         runtime->hw.rates |= codec_dai_drv->capture.rates;
632         }
633
634         snd_pcm_limit_hw_rates(runtime);
635         if (!runtime->hw.rates) {
636                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
637                         codec_dai->name, cpu_dai->name);
638                 goto config_err;
639         }
640         if (!runtime->hw.formats) {
641                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
642                         codec_dai->name, cpu_dai->name);
643                 goto config_err;
644         }
645         if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
646                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
647                                 codec_dai->name, cpu_dai->name);
648                 goto config_err;
649         }
650
651         /* Symmetry only applies if we've already got an active stream. */
652         if (cpu_dai->active || codec_dai->active) {
653                 ret = soc_pcm_apply_symmetry(substream);
654                 if (ret != 0)
655                         goto config_err;
656         }
657
658         pr_debug("asoc: %s <-> %s info:\n",
659                         codec_dai->name, cpu_dai->name);
660         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
661         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
662                  runtime->hw.channels_max);
663         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
664                  runtime->hw.rate_max);
665
666         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
667                 cpu_dai->playback_active++;
668                 codec_dai->playback_active++;
669         } else {
670                 cpu_dai->capture_active++;
671                 codec_dai->capture_active++;
672         }
673         cpu_dai->active++;
674         codec_dai->active++;
675         rtd->codec->active++;
676         mutex_unlock(&pcm_mutex);
677         return 0;
678
679 config_err:
680         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
681                 rtd->dai_link->ops->shutdown(substream);
682
683 machine_err:
684         if (codec_dai->driver->ops->shutdown)
685                 codec_dai->driver->ops->shutdown(substream, codec_dai);
686
687 codec_dai_err:
688         if (platform->driver->ops->close)
689                 platform->driver->ops->close(substream);
690
691 platform_err:
692         if (cpu_dai->driver->ops->shutdown)
693                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
694 out:
695         mutex_unlock(&pcm_mutex);
696         return ret;
697 }
698
699 /*
700  * Power down the audio subsystem pmdown_time msecs after close is called.
701  * This is to ensure there are no pops or clicks in between any music tracks
702  * due to DAPM power cycling.
703  */
704 static void close_delayed_work(struct work_struct *work)
705 {
706         struct snd_soc_pcm_runtime *rtd =
707                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
708         struct snd_soc_dai *codec_dai = rtd->codec_dai;
709
710         mutex_lock(&pcm_mutex);
711
712         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
713                  codec_dai->driver->playback.stream_name,
714                  codec_dai->playback_active ? "active" : "inactive",
715                  codec_dai->pop_wait ? "yes" : "no");
716
717         /* are we waiting on this codec DAI stream */
718         if (codec_dai->pop_wait == 1) {
719                 codec_dai->pop_wait = 0;
720                 snd_soc_dapm_stream_event(rtd,
721                         codec_dai->driver->playback.stream_name,
722                         SND_SOC_DAPM_STREAM_STOP);
723         }
724
725         mutex_unlock(&pcm_mutex);
726 }
727
728 /*
729  * Called by ALSA when a PCM substream is closed. Private data can be
730  * freed here. The cpu DAI, codec DAI, machine and platform are also
731  * shutdown.
732  */
733 static int soc_codec_close(struct snd_pcm_substream *substream)
734 {
735         struct snd_soc_pcm_runtime *rtd = substream->private_data;
736         struct snd_soc_platform *platform = rtd->platform;
737         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
738         struct snd_soc_dai *codec_dai = rtd->codec_dai;
739         struct snd_soc_codec *codec = rtd->codec;
740
741         mutex_lock(&pcm_mutex);
742
743         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
744                 cpu_dai->playback_active--;
745                 codec_dai->playback_active--;
746         } else {
747                 cpu_dai->capture_active--;
748                 codec_dai->capture_active--;
749         }
750
751         cpu_dai->active--;
752         codec_dai->active--;
753         codec->active--;
754
755         /* Muting the DAC suppresses artifacts caused during digital
756          * shutdown, for example from stopping clocks.
757          */
758         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
759                 snd_soc_dai_digital_mute(codec_dai, 1);
760
761         if (cpu_dai->driver->ops->shutdown)
762                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
763
764         if (codec_dai->driver->ops->shutdown)
765                 codec_dai->driver->ops->shutdown(substream, codec_dai);
766
767         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
768                 rtd->dai_link->ops->shutdown(substream);
769
770         if (platform->driver->ops->close)
771                 platform->driver->ops->close(substream);
772         cpu_dai->runtime = NULL;
773
774         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
775                 /* start delayed pop wq here for playback streams */
776                 codec_dai->pop_wait = 1;
777                 schedule_delayed_work(&rtd->delayed_work,
778                         msecs_to_jiffies(rtd->pmdown_time));
779         } else {
780                 /* capture streams can be powered down now */
781                 snd_soc_dapm_stream_event(rtd,
782                         codec_dai->driver->capture.stream_name,
783                         SND_SOC_DAPM_STREAM_STOP);
784         }
785
786         mutex_unlock(&pcm_mutex);
787         return 0;
788 }
789
790 /*
791  * Called by ALSA when the PCM substream is prepared, can set format, sample
792  * rate, etc.  This function is non atomic and can be called multiple times,
793  * it can refer to the runtime info.
794  */
795 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
796 {
797         struct snd_soc_pcm_runtime *rtd = substream->private_data;
798         struct snd_soc_platform *platform = rtd->platform;
799         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
800         struct snd_soc_dai *codec_dai = rtd->codec_dai;
801         int ret = 0;
802
803         mutex_lock(&pcm_mutex);
804
805         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
806                 ret = rtd->dai_link->ops->prepare(substream);
807                 if (ret < 0) {
808                         printk(KERN_ERR "asoc: machine prepare error\n");
809                         goto out;
810                 }
811         }
812
813         if (platform->driver->ops->prepare) {
814                 ret = platform->driver->ops->prepare(substream);
815                 if (ret < 0) {
816                         printk(KERN_ERR "asoc: platform prepare error\n");
817                         goto out;
818                 }
819         }
820
821         if (codec_dai->driver->ops->prepare) {
822                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
823                 if (ret < 0) {
824                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
825                         goto out;
826                 }
827         }
828
829         if (cpu_dai->driver->ops->prepare) {
830                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
831                 if (ret < 0) {
832                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
833                         goto out;
834                 }
835         }
836
837         /* cancel any delayed stream shutdown that is pending */
838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
839             codec_dai->pop_wait) {
840                 codec_dai->pop_wait = 0;
841                 cancel_delayed_work(&rtd->delayed_work);
842         }
843
844         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
845                 snd_soc_dapm_stream_event(rtd,
846                                           codec_dai->driver->playback.stream_name,
847                                           SND_SOC_DAPM_STREAM_START);
848         else
849                 snd_soc_dapm_stream_event(rtd,
850                                           codec_dai->driver->capture.stream_name,
851                                           SND_SOC_DAPM_STREAM_START);
852
853         snd_soc_dai_digital_mute(codec_dai, 0);
854
855 out:
856         mutex_unlock(&pcm_mutex);
857         return ret;
858 }
859
860 /*
861  * Called by ALSA when the hardware params are set by application. This
862  * function can also be called multiple times and can allocate buffers
863  * (using snd_pcm_lib_* ). It's non-atomic.
864  */
865 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
866                                 struct snd_pcm_hw_params *params)
867 {
868         struct snd_soc_pcm_runtime *rtd = substream->private_data;
869         struct snd_soc_platform *platform = rtd->platform;
870         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
871         struct snd_soc_dai *codec_dai = rtd->codec_dai;
872         int ret = 0;
873
874         mutex_lock(&pcm_mutex);
875
876         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
877                 ret = rtd->dai_link->ops->hw_params(substream, params);
878                 if (ret < 0) {
879                         printk(KERN_ERR "asoc: machine hw_params failed\n");
880                         goto out;
881                 }
882         }
883
884         if (codec_dai->driver->ops->hw_params) {
885                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
886                 if (ret < 0) {
887                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
888                                 codec_dai->name);
889                         goto codec_err;
890                 }
891         }
892
893         if (cpu_dai->driver->ops->hw_params) {
894                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
895                 if (ret < 0) {
896                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
897                                 cpu_dai->name);
898                         goto interface_err;
899                 }
900         }
901
902         if (platform->driver->ops->hw_params) {
903                 ret = platform->driver->ops->hw_params(substream, params);
904                 if (ret < 0) {
905                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
906                                 platform->name);
907                         goto platform_err;
908                 }
909         }
910
911         rtd->rate = params_rate(params);
912
913 out:
914         mutex_unlock(&pcm_mutex);
915         return ret;
916
917 platform_err:
918         if (cpu_dai->driver->ops->hw_free)
919                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
920
921 interface_err:
922         if (codec_dai->driver->ops->hw_free)
923                 codec_dai->driver->ops->hw_free(substream, codec_dai);
924
925 codec_err:
926         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
927                 rtd->dai_link->ops->hw_free(substream);
928
929         mutex_unlock(&pcm_mutex);
930         return ret;
931 }
932
933 /*
934  * Frees resources allocated by hw_params, can be called multiple times
935  */
936 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
937 {
938         struct snd_soc_pcm_runtime *rtd = substream->private_data;
939         struct snd_soc_platform *platform = rtd->platform;
940         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
941         struct snd_soc_dai *codec_dai = rtd->codec_dai;
942         struct snd_soc_codec *codec = rtd->codec;
943
944         mutex_lock(&pcm_mutex);
945
946         /* apply codec digital mute */
947         if (!codec->active)
948                 snd_soc_dai_digital_mute(codec_dai, 1);
949
950         /* free any machine hw params */
951         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
952                 rtd->dai_link->ops->hw_free(substream);
953
954         /* free any DMA resources */
955         if (platform->driver->ops->hw_free)
956                 platform->driver->ops->hw_free(substream);
957
958         /* now free hw params for the DAIs  */
959         if (codec_dai->driver->ops->hw_free)
960                 codec_dai->driver->ops->hw_free(substream, codec_dai);
961
962         if (cpu_dai->driver->ops->hw_free)
963                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
964
965         mutex_unlock(&pcm_mutex);
966         return 0;
967 }
968
969 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
970 {
971         struct snd_soc_pcm_runtime *rtd = substream->private_data;
972         struct snd_soc_platform *platform = rtd->platform;
973         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
974         struct snd_soc_dai *codec_dai = rtd->codec_dai;
975         int ret;
976
977         if (codec_dai->driver->ops->trigger) {
978                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
979                 if (ret < 0)
980                         return ret;
981         }
982
983         if (platform->driver->ops->trigger) {
984                 ret = platform->driver->ops->trigger(substream, cmd);
985                 if (ret < 0)
986                         return ret;
987         }
988
989         if (cpu_dai->driver->ops->trigger) {
990                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
991                 if (ret < 0)
992                         return ret;
993         }
994         return 0;
995 }
996
997 /*
998  * soc level wrapper for pointer callback
999  * If cpu_dai, codec_dai, platform driver has the delay callback, than
1000  * the runtime->delay will be updated accordingly.
1001  */
1002 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1003 {
1004         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1005         struct snd_soc_platform *platform = rtd->platform;
1006         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1007         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1008         struct snd_pcm_runtime *runtime = substream->runtime;
1009         snd_pcm_uframes_t offset = 0;
1010         snd_pcm_sframes_t delay = 0;
1011
1012         if (platform->driver->ops->pointer)
1013                 offset = platform->driver->ops->pointer(substream);
1014
1015         if (cpu_dai->driver->ops->delay)
1016                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1017
1018         if (codec_dai->driver->ops->delay)
1019                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1020
1021         if (platform->driver->delay)
1022                 delay += platform->driver->delay(substream, codec_dai);
1023
1024         runtime->delay = delay;
1025
1026         return offset;
1027 }
1028
1029 /* ASoC PCM operations */
1030 static struct snd_pcm_ops soc_pcm_ops = {
1031         .open           = soc_pcm_open,
1032         .close          = soc_codec_close,
1033         .hw_params      = soc_pcm_hw_params,
1034         .hw_free        = soc_pcm_hw_free,
1035         .prepare        = soc_pcm_prepare,
1036         .trigger        = soc_pcm_trigger,
1037         .pointer        = soc_pcm_pointer,
1038 };
1039
1040 #ifdef CONFIG_PM_SLEEP
1041 /* powers down audio subsystem for suspend */
1042 int snd_soc_suspend(struct device *dev)
1043 {
1044         struct snd_soc_card *card = dev_get_drvdata(dev);
1045         struct snd_soc_codec *codec;
1046         int i;
1047
1048         /* If the initialization of this soc device failed, there is no codec
1049          * associated with it. Just bail out in this case.
1050          */
1051         if (list_empty(&card->codec_dev_list))
1052                 return 0;
1053
1054         /* Due to the resume being scheduled into a workqueue we could
1055         * suspend before that's finished - wait for it to complete.
1056          */
1057         snd_power_lock(card->snd_card);
1058         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1059         snd_power_unlock(card->snd_card);
1060
1061         /* we're going to block userspace touching us until resume completes */
1062         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1063
1064         /* mute any active DACs */
1065         for (i = 0; i < card->num_rtd; i++) {
1066                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1067                 struct snd_soc_dai_driver *drv = dai->driver;
1068
1069                 if (card->rtd[i].dai_link->ignore_suspend)
1070                         continue;
1071
1072                 if (drv->ops->digital_mute && dai->playback_active)
1073                         drv->ops->digital_mute(dai, 1);
1074         }
1075
1076         /* suspend all pcms */
1077         for (i = 0; i < card->num_rtd; i++) {
1078                 if (card->rtd[i].dai_link->ignore_suspend)
1079                         continue;
1080
1081                 snd_pcm_suspend_all(card->rtd[i].pcm);
1082         }
1083
1084         if (card->suspend_pre)
1085                 card->suspend_pre(card);
1086
1087         for (i = 0; i < card->num_rtd; i++) {
1088                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1089                 struct snd_soc_platform *platform = card->rtd[i].platform;
1090
1091                 if (card->rtd[i].dai_link->ignore_suspend)
1092                         continue;
1093
1094                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1095                         cpu_dai->driver->suspend(cpu_dai);
1096                 if (platform->driver->suspend && !platform->suspended) {
1097                         platform->driver->suspend(cpu_dai);
1098                         platform->suspended = 1;
1099                 }
1100         }
1101
1102         /* close any waiting streams and save state */
1103         for (i = 0; i < card->num_rtd; i++) {
1104                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1105                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1106         }
1107
1108         for (i = 0; i < card->num_rtd; i++) {
1109                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1110
1111                 if (card->rtd[i].dai_link->ignore_suspend)
1112                         continue;
1113
1114                 if (driver->playback.stream_name != NULL)
1115                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1116                                 SND_SOC_DAPM_STREAM_SUSPEND);
1117
1118                 if (driver->capture.stream_name != NULL)
1119                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1120                                 SND_SOC_DAPM_STREAM_SUSPEND);
1121         }
1122
1123         /* suspend all CODECs */
1124         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1125                 /* If there are paths active then the CODEC will be held with
1126                  * bias _ON and should not be suspended. */
1127                 if (!codec->suspended && codec->driver->suspend) {
1128                         switch (codec->dapm.bias_level) {
1129                         case SND_SOC_BIAS_STANDBY:
1130                         case SND_SOC_BIAS_OFF:
1131                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1132                                 codec->suspended = 1;
1133                                 break;
1134                         default:
1135                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1136                                 break;
1137                         }
1138                 }
1139         }
1140
1141         for (i = 0; i < card->num_rtd; i++) {
1142                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1143
1144                 if (card->rtd[i].dai_link->ignore_suspend)
1145                         continue;
1146
1147                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1148                         cpu_dai->driver->suspend(cpu_dai);
1149         }
1150
1151         if (card->suspend_post)
1152                 card->suspend_post(card);
1153
1154         return 0;
1155 }
1156 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1157
1158 /* deferred resume work, so resume can complete before we finished
1159  * setting our codec back up, which can be very slow on I2C
1160  */
1161 static void soc_resume_deferred(struct work_struct *work)
1162 {
1163         struct snd_soc_card *card =
1164                         container_of(work, struct snd_soc_card, deferred_resume_work);
1165         struct snd_soc_codec *codec;
1166         int i;
1167
1168         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1169          * so userspace apps are blocked from touching us
1170          */
1171
1172         dev_dbg(card->dev, "starting resume work\n");
1173
1174         /* Bring us up into D2 so that DAPM starts enabling things */
1175         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1176
1177         if (card->resume_pre)
1178                 card->resume_pre(card);
1179
1180         /* resume AC97 DAIs */
1181         for (i = 0; i < card->num_rtd; i++) {
1182                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1183
1184                 if (card->rtd[i].dai_link->ignore_suspend)
1185                         continue;
1186
1187                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1188                         cpu_dai->driver->resume(cpu_dai);
1189         }
1190
1191         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1192                 /* If the CODEC was idle over suspend then it will have been
1193                  * left with bias OFF or STANDBY and suspended so we must now
1194                  * resume.  Otherwise the suspend was suppressed.
1195                  */
1196                 if (codec->driver->resume && codec->suspended) {
1197                         switch (codec->dapm.bias_level) {
1198                         case SND_SOC_BIAS_STANDBY:
1199                         case SND_SOC_BIAS_OFF:
1200                                 codec->driver->resume(codec);
1201                                 codec->suspended = 0;
1202                                 break;
1203                         default:
1204                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1205                                 break;
1206                         }
1207                 }
1208         }
1209
1210         for (i = 0; i < card->num_rtd; i++) {
1211                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1212
1213                 if (card->rtd[i].dai_link->ignore_suspend)
1214                         continue;
1215
1216                 if (driver->playback.stream_name != NULL)
1217                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1218                                 SND_SOC_DAPM_STREAM_RESUME);
1219
1220                 if (driver->capture.stream_name != NULL)
1221                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1222                                 SND_SOC_DAPM_STREAM_RESUME);
1223         }
1224
1225         /* unmute any active DACs */
1226         for (i = 0; i < card->num_rtd; i++) {
1227                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1228                 struct snd_soc_dai_driver *drv = dai->driver;
1229
1230                 if (card->rtd[i].dai_link->ignore_suspend)
1231                         continue;
1232
1233                 if (drv->ops->digital_mute && dai->playback_active)
1234                         drv->ops->digital_mute(dai, 0);
1235         }
1236
1237         for (i = 0; i < card->num_rtd; i++) {
1238                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1239                 struct snd_soc_platform *platform = card->rtd[i].platform;
1240
1241                 if (card->rtd[i].dai_link->ignore_suspend)
1242                         continue;
1243
1244                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1245                         cpu_dai->driver->resume(cpu_dai);
1246                 if (platform->driver->resume && platform->suspended) {
1247                         platform->driver->resume(cpu_dai);
1248                         platform->suspended = 0;
1249                 }
1250         }
1251
1252         if (card->resume_post)
1253                 card->resume_post(card);
1254
1255         dev_dbg(card->dev, "resume work completed\n");
1256
1257         /* userspace can access us now we are back as we were before */
1258         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1259 }
1260
1261 /* powers up audio subsystem after a suspend */
1262 int snd_soc_resume(struct device *dev)
1263 {
1264         struct snd_soc_card *card = dev_get_drvdata(dev);
1265         int i;
1266
1267         /* AC97 devices might have other drivers hanging off them so
1268          * need to resume immediately.  Other drivers don't have that
1269          * problem and may take a substantial amount of time to resume
1270          * due to I/O costs and anti-pop so handle them out of line.
1271          */
1272         for (i = 0; i < card->num_rtd; i++) {
1273                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1274                 if (cpu_dai->driver->ac97_control) {
1275                         dev_dbg(dev, "Resuming AC97 immediately\n");
1276                         soc_resume_deferred(&card->deferred_resume_work);
1277                 } else {
1278                         dev_dbg(dev, "Scheduling resume work\n");
1279                         if (!schedule_work(&card->deferred_resume_work))
1280                                 dev_err(dev, "resume work item may be lost\n");
1281                 }
1282         }
1283
1284         return 0;
1285 }
1286 EXPORT_SYMBOL_GPL(snd_soc_resume);
1287 #else
1288 #define snd_soc_suspend NULL
1289 #define snd_soc_resume NULL
1290 #endif
1291
1292 static struct snd_soc_dai_ops null_dai_ops = {
1293 };
1294
1295 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1296 {
1297         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1298         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1299         struct snd_soc_codec *codec;
1300         struct snd_soc_platform *platform;
1301         struct snd_soc_dai *codec_dai, *cpu_dai;
1302
1303         if (rtd->complete)
1304                 return 1;
1305         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1306
1307         /* do we already have the CPU DAI for this link ? */
1308         if (rtd->cpu_dai) {
1309                 goto find_codec;
1310         }
1311         /* no, then find CPU DAI from registered DAIs*/
1312         list_for_each_entry(cpu_dai, &dai_list, list) {
1313                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1314
1315                         if (!try_module_get(cpu_dai->dev->driver->owner))
1316                                 return -ENODEV;
1317
1318                         rtd->cpu_dai = cpu_dai;
1319                         goto find_codec;
1320                 }
1321         }
1322         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1323                         dai_link->cpu_dai_name);
1324
1325 find_codec:
1326         /* do we already have the CODEC for this link ? */
1327         if (rtd->codec) {
1328                 goto find_platform;
1329         }
1330
1331         /* no, then find CODEC from registered CODECs*/
1332         list_for_each_entry(codec, &codec_list, list) {
1333                 if (!strcmp(codec->name, dai_link->codec_name)) {
1334                         rtd->codec = codec;
1335
1336                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1337                         list_for_each_entry(codec_dai, &dai_list, list) {
1338                                 if (codec->dev == codec_dai->dev &&
1339                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1340                                         rtd->codec_dai = codec_dai;
1341                                         goto find_platform;
1342                                 }
1343                         }
1344                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1345                                         dai_link->codec_dai_name);
1346
1347                         goto find_platform;
1348                 }
1349         }
1350         dev_dbg(card->dev, "CODEC %s not registered\n",
1351                         dai_link->codec_name);
1352
1353 find_platform:
1354         /* do we already have the CODEC DAI for this link ? */
1355         if (rtd->platform) {
1356                 goto out;
1357         }
1358         /* no, then find CPU DAI from registered DAIs*/
1359         list_for_each_entry(platform, &platform_list, list) {
1360                 if (!strcmp(platform->name, dai_link->platform_name)) {
1361                         rtd->platform = platform;
1362                         goto out;
1363                 }
1364         }
1365
1366         dev_dbg(card->dev, "platform %s not registered\n",
1367                         dai_link->platform_name);
1368         return 0;
1369
1370 out:
1371         /* mark rtd as complete if we found all 4 of our client devices */
1372         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1373                 rtd->complete = 1;
1374                 card->num_rtd++;
1375         }
1376         return 1;
1377 }
1378
1379 static void soc_remove_codec(struct snd_soc_codec *codec)
1380 {
1381         int err;
1382
1383         if (codec->driver->remove) {
1384                 err = codec->driver->remove(codec);
1385                 if (err < 0)
1386                         dev_err(codec->dev,
1387                                 "asoc: failed to remove %s: %d\n",
1388                                 codec->name, err);
1389         }
1390
1391         /* Make sure all DAPM widgets are freed */
1392         snd_soc_dapm_free(&codec->dapm);
1393
1394         soc_cleanup_codec_debugfs(codec);
1395         codec->probed = 0;
1396         list_del(&codec->card_list);
1397         module_put(codec->dev->driver->owner);
1398 }
1399
1400 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1401 {
1402         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1403         struct snd_soc_codec *codec = rtd->codec;
1404         struct snd_soc_platform *platform = rtd->platform;
1405         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1406         int err;
1407
1408         /* unregister the rtd device */
1409         if (rtd->dev_registered) {
1410                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1411                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1412                 device_unregister(&rtd->dev);
1413                 rtd->dev_registered = 0;
1414         }
1415
1416         /* remove the CODEC DAI */
1417         if (codec_dai && codec_dai->probed) {
1418                 if (codec_dai->driver->remove) {
1419                         err = codec_dai->driver->remove(codec_dai);
1420                         if (err < 0)
1421                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1422                 }
1423                 codec_dai->probed = 0;
1424                 list_del(&codec_dai->card_list);
1425         }
1426
1427         /* remove the platform */
1428         if (platform && platform->probed) {
1429                 if (platform->driver->remove) {
1430                         err = platform->driver->remove(platform);
1431                         if (err < 0)
1432                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1433                 }
1434                 platform->probed = 0;
1435                 list_del(&platform->card_list);
1436                 module_put(platform->dev->driver->owner);
1437         }
1438
1439         /* remove the CODEC */
1440         if (codec && codec->probed)
1441                 soc_remove_codec(codec);
1442
1443         /* remove the cpu_dai */
1444         if (cpu_dai && cpu_dai->probed) {
1445                 if (cpu_dai->driver->remove) {
1446                         err = cpu_dai->driver->remove(cpu_dai);
1447                         if (err < 0)
1448                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1449                 }
1450                 cpu_dai->probed = 0;
1451                 list_del(&cpu_dai->card_list);
1452                 module_put(cpu_dai->dev->driver->owner);
1453         }
1454 }
1455
1456 static void soc_set_name_prefix(struct snd_soc_card *card,
1457                                 struct snd_soc_codec *codec)
1458 {
1459         int i;
1460
1461         if (card->codec_conf == NULL)
1462                 return;
1463
1464         for (i = 0; i < card->num_configs; i++) {
1465                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1466                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1467                         codec->name_prefix = map->name_prefix;
1468                         break;
1469                 }
1470         }
1471 }
1472
1473 static int soc_probe_codec(struct snd_soc_card *card,
1474                            struct snd_soc_codec *codec)
1475 {
1476         int ret = 0;
1477         const struct snd_soc_codec_driver *driver = codec->driver;
1478
1479         codec->card = card;
1480         codec->dapm.card = card;
1481         soc_set_name_prefix(card, codec);
1482
1483         if (!try_module_get(codec->dev->driver->owner))
1484                 return -ENODEV;
1485
1486         if (driver->probe) {
1487                 ret = driver->probe(codec);
1488                 if (ret < 0) {
1489                         dev_err(codec->dev,
1490                                 "asoc: failed to probe CODEC %s: %d\n",
1491                                 codec->name, ret);
1492                         goto err_probe;
1493                 }
1494         }
1495
1496         if (driver->dapm_widgets)
1497                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1498                                           driver->num_dapm_widgets);
1499         if (driver->dapm_routes)
1500                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1501                                         driver->num_dapm_routes);
1502
1503         soc_init_codec_debugfs(codec);
1504
1505         /* mark codec as probed and add to card codec list */
1506         codec->probed = 1;
1507         list_add(&codec->card_list, &card->codec_dev_list);
1508         list_add(&codec->dapm.list, &card->dapm_list);
1509
1510         return 0;
1511
1512 err_probe:
1513         module_put(codec->dev->driver->owner);
1514
1515         return ret;
1516 }
1517
1518 static void rtd_release(struct device *dev) {}
1519
1520 static int soc_post_component_init(struct snd_soc_card *card,
1521                                    struct snd_soc_codec *codec,
1522                                    int num, int dailess)
1523 {
1524         struct snd_soc_dai_link *dai_link = NULL;
1525         struct snd_soc_aux_dev *aux_dev = NULL;
1526         struct snd_soc_pcm_runtime *rtd;
1527         const char *temp, *name;
1528         int ret = 0;
1529
1530         if (!dailess) {
1531                 dai_link = &card->dai_link[num];
1532                 rtd = &card->rtd[num];
1533                 name = dai_link->name;
1534         } else {
1535                 aux_dev = &card->aux_dev[num];
1536                 rtd = &card->rtd_aux[num];
1537                 name = aux_dev->name;
1538         }
1539         rtd->card = card;
1540
1541         /* machine controls, routes and widgets are not prefixed */
1542         temp = codec->name_prefix;
1543         codec->name_prefix = NULL;
1544
1545         /* do machine specific initialization */
1546         if (!dailess && dai_link->init)
1547                 ret = dai_link->init(rtd);
1548         else if (dailess && aux_dev->init)
1549                 ret = aux_dev->init(&codec->dapm);
1550         if (ret < 0) {
1551                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1552                 return ret;
1553         }
1554         codec->name_prefix = temp;
1555
1556         /* Make sure all DAPM widgets are instantiated */
1557         snd_soc_dapm_new_widgets(&codec->dapm);
1558
1559         /* register the rtd device */
1560         rtd->codec = codec;
1561         rtd->dev.parent = card->dev;
1562         rtd->dev.release = rtd_release;
1563         rtd->dev.init_name = name;
1564         ret = device_register(&rtd->dev);
1565         if (ret < 0) {
1566                 dev_err(card->dev,
1567                         "asoc: failed to register runtime device: %d\n", ret);
1568                 return ret;
1569         }
1570         rtd->dev_registered = 1;
1571
1572         /* add DAPM sysfs entries for this codec */
1573         ret = snd_soc_dapm_sys_add(&rtd->dev);
1574         if (ret < 0)
1575                 dev_err(codec->dev,
1576                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1577                         ret);
1578
1579         /* add codec sysfs entries */
1580         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1581         if (ret < 0)
1582                 dev_err(codec->dev,
1583                         "asoc: failed to add codec sysfs files: %d\n", ret);
1584
1585         return 0;
1586 }
1587
1588 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1589 {
1590         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1591         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1592         struct snd_soc_codec *codec = rtd->codec;
1593         struct snd_soc_platform *platform = rtd->platform;
1594         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1595         int ret;
1596
1597         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1598
1599         /* config components */
1600         codec_dai->codec = codec;
1601         cpu_dai->platform = platform;
1602         codec_dai->card = card;
1603         cpu_dai->card = card;
1604
1605         /* set default power off timeout */
1606         rtd->pmdown_time = pmdown_time;
1607
1608         /* probe the cpu_dai */
1609         if (!cpu_dai->probed) {
1610                 if (cpu_dai->driver->probe) {
1611                         ret = cpu_dai->driver->probe(cpu_dai);
1612                         if (ret < 0) {
1613                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1614                                                 cpu_dai->name);
1615                                 return ret;
1616                         }
1617                 }
1618                 cpu_dai->probed = 1;
1619                 /* mark cpu_dai as probed and add to card cpu_dai list */
1620                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1621         }
1622
1623         /* probe the CODEC */
1624         if (!codec->probed) {
1625                 ret = soc_probe_codec(card, codec);
1626                 if (ret < 0)
1627                         return ret;
1628         }
1629
1630         /* probe the platform */
1631         if (!platform->probed) {
1632                 if (!try_module_get(platform->dev->driver->owner))
1633                         return -ENODEV;
1634
1635                 if (platform->driver->probe) {
1636                         ret = platform->driver->probe(platform);
1637                         if (ret < 0) {
1638                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1639                                                 platform->name);
1640                                 module_put(platform->dev->driver->owner);
1641                                 return ret;
1642                         }
1643                 }
1644                 /* mark platform as probed and add to card platform list */
1645                 platform->probed = 1;
1646                 list_add(&platform->card_list, &card->platform_dev_list);
1647         }
1648
1649         /* probe the CODEC DAI */
1650         if (!codec_dai->probed) {
1651                 if (codec_dai->driver->probe) {
1652                         ret = codec_dai->driver->probe(codec_dai);
1653                         if (ret < 0) {
1654                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1655                                                 codec_dai->name);
1656                                 return ret;
1657                         }
1658                 }
1659
1660                 /* mark cpu_dai as probed and add to card cpu_dai list */
1661                 codec_dai->probed = 1;
1662                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1663         }
1664
1665         /* DAPM dai link stream work */
1666         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1667
1668         ret = soc_post_component_init(card, codec, num, 0);
1669         if (ret)
1670                 return ret;
1671
1672         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1673         if (ret < 0)
1674                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1675
1676         /* create the pcm */
1677         ret = soc_new_pcm(rtd, num);
1678         if (ret < 0) {
1679                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1680                 return ret;
1681         }
1682
1683         /* add platform data for AC97 devices */
1684         if (rtd->codec_dai->driver->ac97_control)
1685                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1686
1687         return 0;
1688 }
1689
1690 #ifdef CONFIG_SND_SOC_AC97_BUS
1691 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1692 {
1693         int ret;
1694
1695         /* Only instantiate AC97 if not already done by the adaptor
1696          * for the generic AC97 subsystem.
1697          */
1698         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1699                 /*
1700                  * It is possible that the AC97 device is already registered to
1701                  * the device subsystem. This happens when the device is created
1702                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1703                  * is the generic AC97 glue but others migh emerge.
1704                  *
1705                  * In those cases we don't try to register the device again.
1706                  */
1707                 if (!rtd->codec->ac97_created)
1708                         return 0;
1709
1710                 ret = soc_ac97_dev_register(rtd->codec);
1711                 if (ret < 0) {
1712                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1713                         return ret;
1714                 }
1715
1716                 rtd->codec->ac97_registered = 1;
1717         }
1718         return 0;
1719 }
1720
1721 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1722 {
1723         if (codec->ac97_registered) {
1724                 soc_ac97_dev_unregister(codec);
1725                 codec->ac97_registered = 0;
1726         }
1727 }
1728 #endif
1729
1730 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1731 {
1732         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1733         struct snd_soc_codec *codec;
1734         int ret = -ENODEV;
1735
1736         /* find CODEC from registered CODECs*/
1737         list_for_each_entry(codec, &codec_list, list) {
1738                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1739                         if (codec->probed) {
1740                                 dev_err(codec->dev,
1741                                         "asoc: codec already probed");
1742                                 ret = -EBUSY;
1743                                 goto out;
1744                         }
1745                         goto found;
1746                 }
1747         }
1748         /* codec not found */
1749         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1750         goto out;
1751
1752 found:
1753         ret = soc_probe_codec(card, codec);
1754         if (ret < 0)
1755                 return ret;
1756
1757         ret = soc_post_component_init(card, codec, num, 1);
1758
1759 out:
1760         return ret;
1761 }
1762
1763 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1764 {
1765         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1766         struct snd_soc_codec *codec = rtd->codec;
1767
1768         /* unregister the rtd device */
1769         if (rtd->dev_registered) {
1770                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1771                 device_unregister(&rtd->dev);
1772                 rtd->dev_registered = 0;
1773         }
1774
1775         if (codec && codec->probed)
1776                 soc_remove_codec(codec);
1777 }
1778
1779 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1780                                     enum snd_soc_compress_type compress_type)
1781 {
1782         int ret;
1783
1784         if (codec->cache_init)
1785                 return 0;
1786
1787         /* override the compress_type if necessary */
1788         if (compress_type && codec->compress_type != compress_type)
1789                 codec->compress_type = compress_type;
1790         ret = snd_soc_cache_init(codec);
1791         if (ret < 0) {
1792                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1793                         ret);
1794                 return ret;
1795         }
1796         codec->cache_init = 1;
1797         return 0;
1798 }
1799
1800 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1801 {
1802         struct snd_soc_codec *codec;
1803         struct snd_soc_codec_conf *codec_conf;
1804         enum snd_soc_compress_type compress_type;
1805         int ret, i;
1806
1807         mutex_lock(&card->mutex);
1808
1809         if (card->instantiated) {
1810                 mutex_unlock(&card->mutex);
1811                 return;
1812         }
1813
1814         /* bind DAIs */
1815         for (i = 0; i < card->num_links; i++)
1816                 soc_bind_dai_link(card, i);
1817
1818         /* bind completed ? */
1819         if (card->num_rtd != card->num_links) {
1820                 mutex_unlock(&card->mutex);
1821                 return;
1822         }
1823
1824         /* initialize the register cache for each available codec */
1825         list_for_each_entry(codec, &codec_list, list) {
1826                 if (codec->cache_init)
1827                         continue;
1828                 /* by default we don't override the compress_type */
1829                 compress_type = 0;
1830                 /* check to see if we need to override the compress_type */
1831                 for (i = 0; i < card->num_configs; ++i) {
1832                         codec_conf = &card->codec_conf[i];
1833                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1834                                 compress_type = codec_conf->compress_type;
1835                                 if (compress_type && compress_type
1836                                     != codec->compress_type)
1837                                         break;
1838                         }
1839                 }
1840                 ret = snd_soc_init_codec_cache(codec, compress_type);
1841                 if (ret < 0) {
1842                         mutex_unlock(&card->mutex);
1843                         return;
1844                 }
1845         }
1846
1847         /* card bind complete so register a sound card */
1848         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1849                         card->owner, 0, &card->snd_card);
1850         if (ret < 0) {
1851                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1852                         card->name);
1853                 mutex_unlock(&card->mutex);
1854                 return;
1855         }
1856         card->snd_card->dev = card->dev;
1857
1858         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1859         card->dapm.dev = card->dev;
1860         card->dapm.card = card;
1861         list_add(&card->dapm.list, &card->dapm_list);
1862
1863 #ifdef CONFIG_PM_SLEEP
1864         /* deferred resume work */
1865         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1866 #endif
1867
1868         /* initialise the sound card only once */
1869         if (card->probe) {
1870                 ret = card->probe(card);
1871                 if (ret < 0)
1872                         goto card_probe_error;
1873         }
1874
1875         for (i = 0; i < card->num_links; i++) {
1876                 ret = soc_probe_dai_link(card, i);
1877                 if (ret < 0) {
1878                         pr_err("asoc: failed to instantiate card %s: %d\n",
1879                                card->name, ret);
1880                         goto probe_dai_err;
1881                 }
1882         }
1883
1884         for (i = 0; i < card->num_aux_devs; i++) {
1885                 ret = soc_probe_aux_dev(card, i);
1886                 if (ret < 0) {
1887                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1888                                card->name, ret);
1889                         goto probe_aux_dev_err;
1890                 }
1891         }
1892
1893         if (card->dapm_widgets)
1894                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1895                                           card->num_dapm_widgets);
1896         if (card->dapm_routes)
1897                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1898                                         card->num_dapm_routes);
1899
1900 #ifdef CONFIG_DEBUG_FS
1901         card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
1902                                                      card->debugfs_card_root);
1903         if (!card->dapm.debugfs_dapm)
1904                 printk(KERN_WARNING
1905                        "Failed to create card DAPM debugfs directory\n");
1906
1907         snd_soc_dapm_debugfs_init(&card->dapm);
1908 #endif
1909
1910         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1911                  "%s",  card->name);
1912         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1913                  "%s", card->name);
1914
1915         if (card->late_probe) {
1916                 ret = card->late_probe(card);
1917                 if (ret < 0) {
1918                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1919                                 card->name, ret);
1920                         goto probe_aux_dev_err;
1921                 }
1922         }
1923
1924         ret = snd_card_register(card->snd_card);
1925         if (ret < 0) {
1926                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1927                 goto probe_aux_dev_err;
1928         }
1929
1930 #ifdef CONFIG_SND_SOC_AC97_BUS
1931         /* register any AC97 codecs */
1932         for (i = 0; i < card->num_rtd; i++) {
1933                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1934                 if (ret < 0) {
1935                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1936                         while (--i >= 0)
1937                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1938                         goto probe_aux_dev_err;
1939                 }
1940         }
1941 #endif
1942
1943         card->instantiated = 1;
1944         mutex_unlock(&card->mutex);
1945         return;
1946
1947 probe_aux_dev_err:
1948         for (i = 0; i < card->num_aux_devs; i++)
1949                 soc_remove_aux_dev(card, i);
1950
1951 probe_dai_err:
1952         for (i = 0; i < card->num_links; i++)
1953                 soc_remove_dai_link(card, i);
1954
1955 card_probe_error:
1956         if (card->remove)
1957                 card->remove(card);
1958
1959         snd_card_free(card->snd_card);
1960
1961         mutex_unlock(&card->mutex);
1962 }
1963
1964 /*
1965  * Attempt to initialise any uninitialised cards.  Must be called with
1966  * client_mutex.
1967  */
1968 static void snd_soc_instantiate_cards(void)
1969 {
1970         struct snd_soc_card *card;
1971         list_for_each_entry(card, &card_list, list)
1972                 snd_soc_instantiate_card(card);
1973 }
1974
1975 /* probes a new socdev */
1976 static int soc_probe(struct platform_device *pdev)
1977 {
1978         struct snd_soc_card *card = platform_get_drvdata(pdev);
1979         int ret = 0;
1980
1981         /*
1982          * no card, so machine driver should be registering card
1983          * we should not be here in that case so ret error
1984          */
1985         if (!card)
1986                 return -EINVAL;
1987
1988         /* Bodge while we unpick instantiation */
1989         card->dev = &pdev->dev;
1990
1991         ret = snd_soc_register_card(card);
1992         if (ret != 0) {
1993                 dev_err(&pdev->dev, "Failed to register card\n");
1994                 return ret;
1995         }
1996
1997         return 0;
1998 }
1999
2000 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2001 {
2002         int i;
2003
2004         /* make sure any delayed work runs */
2005         for (i = 0; i < card->num_rtd; i++) {
2006                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2007                 flush_delayed_work_sync(&rtd->delayed_work);
2008         }
2009
2010         /* remove auxiliary devices */
2011         for (i = 0; i < card->num_aux_devs; i++)
2012                 soc_remove_aux_dev(card, i);
2013
2014         /* remove and free each DAI */
2015         for (i = 0; i < card->num_rtd; i++)
2016                 soc_remove_dai_link(card, i);
2017
2018         soc_cleanup_card_debugfs(card);
2019
2020         /* remove the card */
2021         if (card->remove)
2022                 card->remove(card);
2023
2024         kfree(card->rtd);
2025         snd_card_free(card->snd_card);
2026         return 0;
2027
2028 }
2029
2030 /* removes a socdev */
2031 static int soc_remove(struct platform_device *pdev)
2032 {
2033         struct snd_soc_card *card = platform_get_drvdata(pdev);
2034
2035         snd_soc_unregister_card(card);
2036         return 0;
2037 }
2038
2039 int snd_soc_poweroff(struct device *dev)
2040 {
2041         struct snd_soc_card *card = dev_get_drvdata(dev);
2042         int i;
2043
2044         if (!card->instantiated)
2045                 return 0;
2046
2047         /* Flush out pmdown_time work - we actually do want to run it
2048          * now, we're shutting down so no imminent restart. */
2049         for (i = 0; i < card->num_rtd; i++) {
2050                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2051                 flush_delayed_work_sync(&rtd->delayed_work);
2052         }
2053
2054         snd_soc_dapm_shutdown(card);
2055
2056         return 0;
2057 }
2058 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2059
2060 const struct dev_pm_ops snd_soc_pm_ops = {
2061         .suspend = snd_soc_suspend,
2062         .resume = snd_soc_resume,
2063         .poweroff = snd_soc_poweroff,
2064 };
2065
2066 /* ASoC platform driver */
2067 static struct platform_driver soc_driver = {
2068         .driver         = {
2069                 .name           = "soc-audio",
2070                 .owner          = THIS_MODULE,
2071                 .pm             = &snd_soc_pm_ops,
2072         },
2073         .probe          = soc_probe,
2074         .remove         = soc_remove,
2075 };
2076
2077 /* create a new pcm */
2078 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2079 {
2080         struct snd_soc_codec *codec = rtd->codec;
2081         struct snd_soc_platform *platform = rtd->platform;
2082         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2083         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2084         struct snd_pcm *pcm;
2085         char new_name[64];
2086         int ret = 0, playback = 0, capture = 0;
2087
2088         /* check client and interface hw capabilities */
2089         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2090                         rtd->dai_link->stream_name, codec_dai->name, num);
2091
2092         if (codec_dai->driver->playback.channels_min)
2093                 playback = 1;
2094         if (codec_dai->driver->capture.channels_min)
2095                 capture = 1;
2096
2097         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2098         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2099                         num, playback, capture, &pcm);
2100         if (ret < 0) {
2101                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2102                 return ret;
2103         }
2104
2105         rtd->pcm = pcm;
2106         pcm->private_data = rtd;
2107         soc_pcm_ops.mmap = platform->driver->ops->mmap;
2108         soc_pcm_ops.pointer = platform->driver->ops->pointer;
2109         soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2110         soc_pcm_ops.copy = platform->driver->ops->copy;
2111         soc_pcm_ops.silence = platform->driver->ops->silence;
2112         soc_pcm_ops.ack = platform->driver->ops->ack;
2113         soc_pcm_ops.page = platform->driver->ops->page;
2114
2115         if (playback)
2116                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2117
2118         if (capture)
2119                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2120
2121         ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2122         if (ret < 0) {
2123                 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2124                 return ret;
2125         }
2126
2127         pcm->private_free = platform->driver->pcm_free;
2128         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2129                 cpu_dai->name);
2130         return ret;
2131 }
2132
2133 /**
2134  * snd_soc_codec_volatile_register: Report if a register is volatile.
2135  *
2136  * @codec: CODEC to query.
2137  * @reg: Register to query.
2138  *
2139  * Boolean function indiciating if a CODEC register is volatile.
2140  */
2141 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2142                                     unsigned int reg)
2143 {
2144         if (codec->volatile_register)
2145                 return codec->volatile_register(codec, reg);
2146         else
2147                 return 0;
2148 }
2149 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2150
2151 /**
2152  * snd_soc_new_ac97_codec - initailise AC97 device
2153  * @codec: audio codec
2154  * @ops: AC97 bus operations
2155  * @num: AC97 codec number
2156  *
2157  * Initialises AC97 codec resources for use by ad-hoc devices only.
2158  */
2159 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2160         struct snd_ac97_bus_ops *ops, int num)
2161 {
2162         mutex_lock(&codec->mutex);
2163
2164         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2165         if (codec->ac97 == NULL) {
2166                 mutex_unlock(&codec->mutex);
2167                 return -ENOMEM;
2168         }
2169
2170         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2171         if (codec->ac97->bus == NULL) {
2172                 kfree(codec->ac97);
2173                 codec->ac97 = NULL;
2174                 mutex_unlock(&codec->mutex);
2175                 return -ENOMEM;
2176         }
2177
2178         codec->ac97->bus->ops = ops;
2179         codec->ac97->num = num;
2180
2181         /*
2182          * Mark the AC97 device to be created by us. This way we ensure that the
2183          * device will be registered with the device subsystem later on.
2184          */
2185         codec->ac97_created = 1;
2186
2187         mutex_unlock(&codec->mutex);
2188         return 0;
2189 }
2190 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2191
2192 /**
2193  * snd_soc_free_ac97_codec - free AC97 codec device
2194  * @codec: audio codec
2195  *
2196  * Frees AC97 codec device resources.
2197  */
2198 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2199 {
2200         mutex_lock(&codec->mutex);
2201 #ifdef CONFIG_SND_SOC_AC97_BUS
2202         soc_unregister_ac97_dai_link(codec);
2203 #endif
2204         kfree(codec->ac97->bus);
2205         kfree(codec->ac97);
2206         codec->ac97 = NULL;
2207         codec->ac97_created = 0;
2208         mutex_unlock(&codec->mutex);
2209 }
2210 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2211
2212 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2213 {
2214         unsigned int ret;
2215
2216         ret = codec->read(codec, reg);
2217         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2218         trace_snd_soc_reg_read(codec, reg, ret);
2219
2220         return ret;
2221 }
2222 EXPORT_SYMBOL_GPL(snd_soc_read);
2223
2224 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2225                            unsigned int reg, unsigned int val)
2226 {
2227         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2228         trace_snd_soc_reg_write(codec, reg, val);
2229         return codec->write(codec, reg, val);
2230 }
2231 EXPORT_SYMBOL_GPL(snd_soc_write);
2232
2233 /**
2234  * snd_soc_update_bits - update codec register bits
2235  * @codec: audio codec
2236  * @reg: codec register
2237  * @mask: register mask
2238  * @value: new value
2239  *
2240  * Writes new register value.
2241  *
2242  * Returns 1 for change, 0 for no change, or negative error code.
2243  */
2244 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2245                                 unsigned int mask, unsigned int value)
2246 {
2247         int change;
2248         unsigned int old, new;
2249         int ret;
2250
2251         ret = snd_soc_read(codec, reg);
2252         if (ret < 0)
2253                 return ret;
2254
2255         old = ret;
2256         new = (old & ~mask) | value;
2257         change = old != new;
2258         if (change) {
2259                 ret = snd_soc_write(codec, reg, new);
2260                 if (ret < 0)
2261                         return ret;
2262         }
2263
2264         return change;
2265 }
2266 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2267
2268 /**
2269  * snd_soc_update_bits_locked - update codec register bits
2270  * @codec: audio codec
2271  * @reg: codec register
2272  * @mask: register mask
2273  * @value: new value
2274  *
2275  * Writes new register value, and takes the codec mutex.
2276  *
2277  * Returns 1 for change else 0.
2278  */
2279 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2280                                unsigned short reg, unsigned int mask,
2281                                unsigned int value)
2282 {
2283         int change;
2284
2285         mutex_lock(&codec->mutex);
2286         change = snd_soc_update_bits(codec, reg, mask, value);
2287         mutex_unlock(&codec->mutex);
2288
2289         return change;
2290 }
2291 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2292
2293 /**
2294  * snd_soc_test_bits - test register for change
2295  * @codec: audio codec
2296  * @reg: codec register
2297  * @mask: register mask
2298  * @value: new value
2299  *
2300  * Tests a register with a new value and checks if the new value is
2301  * different from the old value.
2302  *
2303  * Returns 1 for change else 0.
2304  */
2305 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2306                                 unsigned int mask, unsigned int value)
2307 {
2308         int change;
2309         unsigned int old, new;
2310
2311         old = snd_soc_read(codec, reg);
2312         new = (old & ~mask) | value;
2313         change = old != new;
2314
2315         return change;
2316 }
2317 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2318
2319 /**
2320  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2321  * @substream: the pcm substream
2322  * @hw: the hardware parameters
2323  *
2324  * Sets the substream runtime hardware parameters.
2325  */
2326 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2327         const struct snd_pcm_hardware *hw)
2328 {
2329         struct snd_pcm_runtime *runtime = substream->runtime;
2330         runtime->hw.info = hw->info;
2331         runtime->hw.formats = hw->formats;
2332         runtime->hw.period_bytes_min = hw->period_bytes_min;
2333         runtime->hw.period_bytes_max = hw->period_bytes_max;
2334         runtime->hw.periods_min = hw->periods_min;
2335         runtime->hw.periods_max = hw->periods_max;
2336         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2337         runtime->hw.fifo_size = hw->fifo_size;
2338         return 0;
2339 }
2340 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2341
2342 /**
2343  * snd_soc_cnew - create new control
2344  * @_template: control template
2345  * @data: control private data
2346  * @long_name: control long name
2347  * @prefix: control name prefix
2348  *
2349  * Create a new mixer control from a template control.
2350  *
2351  * Returns 0 for success, else error.
2352  */
2353 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2354                                   void *data, char *long_name,
2355                                   const char *prefix)
2356 {
2357         struct snd_kcontrol_new template;
2358         struct snd_kcontrol *kcontrol;
2359         char *name = NULL;
2360         int name_len;
2361
2362         memcpy(&template, _template, sizeof(template));
2363         template.index = 0;
2364
2365         if (!long_name)
2366                 long_name = template.name;
2367
2368         if (prefix) {
2369                 name_len = strlen(long_name) + strlen(prefix) + 2;
2370                 name = kmalloc(name_len, GFP_ATOMIC);
2371                 if (!name)
2372                         return NULL;
2373
2374                 snprintf(name, name_len, "%s %s", prefix, long_name);
2375
2376                 template.name = name;
2377         } else {
2378                 template.name = long_name;
2379         }
2380
2381         kcontrol = snd_ctl_new1(&template, data);
2382
2383         kfree(name);
2384
2385         return kcontrol;
2386 }
2387 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2388
2389 /**
2390  * snd_soc_add_controls - add an array of controls to a codec.
2391  * Convienience function to add a list of controls. Many codecs were
2392  * duplicating this code.
2393  *
2394  * @codec: codec to add controls to
2395  * @controls: array of controls to add
2396  * @num_controls: number of elements in the array
2397  *
2398  * Return 0 for success, else error.
2399  */
2400 int snd_soc_add_controls(struct snd_soc_codec *codec,
2401         const struct snd_kcontrol_new *controls, int num_controls)
2402 {
2403         struct snd_card *card = codec->card->snd_card;
2404         int err, i;
2405
2406         for (i = 0; i < num_controls; i++) {
2407                 const struct snd_kcontrol_new *control = &controls[i];
2408                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2409                                                      control->name,
2410                                                      codec->name_prefix));
2411                 if (err < 0) {
2412                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2413                                 codec->name, control->name, err);
2414                         return err;
2415                 }
2416         }
2417
2418         return 0;
2419 }
2420 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2421
2422 /**
2423  * snd_soc_info_enum_double - enumerated double mixer info callback
2424  * @kcontrol: mixer control
2425  * @uinfo: control element information
2426  *
2427  * Callback to provide information about a double enumerated
2428  * mixer control.
2429  *
2430  * Returns 0 for success.
2431  */
2432 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2433         struct snd_ctl_elem_info *uinfo)
2434 {
2435         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2436
2437         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2438         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2439         uinfo->value.enumerated.items = e->max;
2440
2441         if (uinfo->value.enumerated.item > e->max - 1)
2442                 uinfo->value.enumerated.item = e->max - 1;
2443         strcpy(uinfo->value.enumerated.name,
2444                 e->texts[uinfo->value.enumerated.item]);
2445         return 0;
2446 }
2447 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2448
2449 /**
2450  * snd_soc_get_enum_double - enumerated double mixer get callback
2451  * @kcontrol: mixer control
2452  * @ucontrol: control element information
2453  *
2454  * Callback to get the value of a double enumerated mixer.
2455  *
2456  * Returns 0 for success.
2457  */
2458 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2459         struct snd_ctl_elem_value *ucontrol)
2460 {
2461         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2462         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2463         unsigned int val, bitmask;
2464
2465         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2466                 ;
2467         val = snd_soc_read(codec, e->reg);
2468         ucontrol->value.enumerated.item[0]
2469                 = (val >> e->shift_l) & (bitmask - 1);
2470         if (e->shift_l != e->shift_r)
2471                 ucontrol->value.enumerated.item[1] =
2472                         (val >> e->shift_r) & (bitmask - 1);
2473
2474         return 0;
2475 }
2476 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2477
2478 /**
2479  * snd_soc_put_enum_double - enumerated double mixer put callback
2480  * @kcontrol: mixer control
2481  * @ucontrol: control element information
2482  *
2483  * Callback to set the value of a double enumerated mixer.
2484  *
2485  * Returns 0 for success.
2486  */
2487 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2488         struct snd_ctl_elem_value *ucontrol)
2489 {
2490         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2491         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2492         unsigned int val;
2493         unsigned int mask, bitmask;
2494
2495         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2496                 ;
2497         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2498                 return -EINVAL;
2499         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2500         mask = (bitmask - 1) << e->shift_l;
2501         if (e->shift_l != e->shift_r) {
2502                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2503                         return -EINVAL;
2504                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2505                 mask |= (bitmask - 1) << e->shift_r;
2506         }
2507
2508         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2509 }
2510 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2511
2512 /**
2513  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2514  * @kcontrol: mixer control
2515  * @ucontrol: control element information
2516  *
2517  * Callback to get the value of a double semi enumerated mixer.
2518  *
2519  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2520  * used for handling bitfield coded enumeration for example.
2521  *
2522  * Returns 0 for success.
2523  */
2524 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2525         struct snd_ctl_elem_value *ucontrol)
2526 {
2527         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2528         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2529         unsigned int reg_val, val, mux;
2530
2531         reg_val = snd_soc_read(codec, e->reg);
2532         val = (reg_val >> e->shift_l) & e->mask;
2533         for (mux = 0; mux < e->max; mux++) {
2534                 if (val == e->values[mux])
2535                         break;
2536         }
2537         ucontrol->value.enumerated.item[0] = mux;
2538         if (e->shift_l != e->shift_r) {
2539                 val = (reg_val >> e->shift_r) & e->mask;
2540                 for (mux = 0; mux < e->max; mux++) {
2541                         if (val == e->values[mux])
2542                                 break;
2543                 }
2544                 ucontrol->value.enumerated.item[1] = mux;
2545         }
2546
2547         return 0;
2548 }
2549 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2550
2551 /**
2552  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2553  * @kcontrol: mixer control
2554  * @ucontrol: control element information
2555  *
2556  * Callback to set the value of a double semi enumerated mixer.
2557  *
2558  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2559  * used for handling bitfield coded enumeration for example.
2560  *
2561  * Returns 0 for success.
2562  */
2563 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2564         struct snd_ctl_elem_value *ucontrol)
2565 {
2566         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2567         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2568         unsigned int val;
2569         unsigned int mask;
2570
2571         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2572                 return -EINVAL;
2573         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2574         mask = e->mask << e->shift_l;
2575         if (e->shift_l != e->shift_r) {
2576                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2577                         return -EINVAL;
2578                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2579                 mask |= e->mask << e->shift_r;
2580         }
2581
2582         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2583 }
2584 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2585
2586 /**
2587  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2588  * @kcontrol: mixer control
2589  * @uinfo: control element information
2590  *
2591  * Callback to provide information about an external enumerated
2592  * single mixer.
2593  *
2594  * Returns 0 for success.
2595  */
2596 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2597         struct snd_ctl_elem_info *uinfo)
2598 {
2599         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2600
2601         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2602         uinfo->count = 1;
2603         uinfo->value.enumerated.items = e->max;
2604
2605         if (uinfo->value.enumerated.item > e->max - 1)
2606                 uinfo->value.enumerated.item = e->max - 1;
2607         strcpy(uinfo->value.enumerated.name,
2608                 e->texts[uinfo->value.enumerated.item]);
2609         return 0;
2610 }
2611 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2612
2613 /**
2614  * snd_soc_info_volsw_ext - external single mixer info callback
2615  * @kcontrol: mixer control
2616  * @uinfo: control element information
2617  *
2618  * Callback to provide information about a single external mixer control.
2619  *
2620  * Returns 0 for success.
2621  */
2622 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2623         struct snd_ctl_elem_info *uinfo)
2624 {
2625         int max = kcontrol->private_value;
2626
2627         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2628                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2629         else
2630                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2631
2632         uinfo->count = 1;
2633         uinfo->value.integer.min = 0;
2634         uinfo->value.integer.max = max;
2635         return 0;
2636 }
2637 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2638
2639 /**
2640  * snd_soc_info_volsw - single mixer info callback
2641  * @kcontrol: mixer control
2642  * @uinfo: control element information
2643  *
2644  * Callback to provide information about a single mixer control.
2645  *
2646  * Returns 0 for success.
2647  */
2648 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2649         struct snd_ctl_elem_info *uinfo)
2650 {
2651         struct soc_mixer_control *mc =
2652                 (struct soc_mixer_control *)kcontrol->private_value;
2653         int platform_max;
2654         unsigned int shift = mc->shift;
2655         unsigned int rshift = mc->rshift;
2656
2657         if (!mc->platform_max)
2658                 mc->platform_max = mc->max;
2659         platform_max = mc->platform_max;
2660
2661         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2662                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2663         else
2664                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2665
2666         uinfo->count = shift == rshift ? 1 : 2;
2667         uinfo->value.integer.min = 0;
2668         uinfo->value.integer.max = platform_max;
2669         return 0;
2670 }
2671 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2672
2673 /**
2674  * snd_soc_get_volsw - single mixer get callback
2675  * @kcontrol: mixer control
2676  * @ucontrol: control element information
2677  *
2678  * Callback to get the value of a single mixer control.
2679  *
2680  * Returns 0 for success.
2681  */
2682 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2683         struct snd_ctl_elem_value *ucontrol)
2684 {
2685         struct soc_mixer_control *mc =
2686                 (struct soc_mixer_control *)kcontrol->private_value;
2687         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2688         unsigned int reg = mc->reg;
2689         unsigned int shift = mc->shift;
2690         unsigned int rshift = mc->rshift;
2691         int max = mc->max;
2692         unsigned int mask = (1 << fls(max)) - 1;
2693         unsigned int invert = mc->invert;
2694
2695         ucontrol->value.integer.value[0] =
2696                 (snd_soc_read(codec, reg) >> shift) & mask;
2697         if (shift != rshift)
2698                 ucontrol->value.integer.value[1] =
2699                         (snd_soc_read(codec, reg) >> rshift) & mask;
2700         if (invert) {
2701                 ucontrol->value.integer.value[0] =
2702                         max - ucontrol->value.integer.value[0];
2703                 if (shift != rshift)
2704                         ucontrol->value.integer.value[1] =
2705                                 max - ucontrol->value.integer.value[1];
2706         }
2707
2708         return 0;
2709 }
2710 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2711
2712 /**
2713  * snd_soc_put_volsw - single mixer put callback
2714  * @kcontrol: mixer control
2715  * @ucontrol: control element information
2716  *
2717  * Callback to set the value of a single mixer control.
2718  *
2719  * Returns 0 for success.
2720  */
2721 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2722         struct snd_ctl_elem_value *ucontrol)
2723 {
2724         struct soc_mixer_control *mc =
2725                 (struct soc_mixer_control *)kcontrol->private_value;
2726         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2727         unsigned int reg = mc->reg;
2728         unsigned int shift = mc->shift;
2729         unsigned int rshift = mc->rshift;
2730         int max = mc->max;
2731         unsigned int mask = (1 << fls(max)) - 1;
2732         unsigned int invert = mc->invert;
2733         unsigned int val, val2, val_mask;
2734
2735         val = (ucontrol->value.integer.value[0] & mask);
2736         if (invert)
2737                 val = max - val;
2738         val_mask = mask << shift;
2739         val = val << shift;
2740         if (shift != rshift) {
2741                 val2 = (ucontrol->value.integer.value[1] & mask);
2742                 if (invert)
2743                         val2 = max - val2;
2744                 val_mask |= mask << rshift;
2745                 val |= val2 << rshift;
2746         }
2747         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2748 }
2749 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2750
2751 /**
2752  * snd_soc_info_volsw_2r - double mixer info callback
2753  * @kcontrol: mixer control
2754  * @uinfo: control element information
2755  *
2756  * Callback to provide information about a double mixer control that
2757  * spans 2 codec registers.
2758  *
2759  * Returns 0 for success.
2760  */
2761 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2762         struct snd_ctl_elem_info *uinfo)
2763 {
2764         struct soc_mixer_control *mc =
2765                 (struct soc_mixer_control *)kcontrol->private_value;
2766         int platform_max;
2767
2768         if (!mc->platform_max)
2769                 mc->platform_max = mc->max;
2770         platform_max = mc->platform_max;
2771
2772         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2773                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2774         else
2775                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2776
2777         uinfo->count = 2;
2778         uinfo->value.integer.min = 0;
2779         uinfo->value.integer.max = platform_max;
2780         return 0;
2781 }
2782 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2783
2784 /**
2785  * snd_soc_get_volsw_2r - double mixer get callback
2786  * @kcontrol: mixer control
2787  * @ucontrol: control element information
2788  *
2789  * Callback to get the value of a double mixer control that spans 2 registers.
2790  *
2791  * Returns 0 for success.
2792  */
2793 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2794         struct snd_ctl_elem_value *ucontrol)
2795 {
2796         struct soc_mixer_control *mc =
2797                 (struct soc_mixer_control *)kcontrol->private_value;
2798         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2799         unsigned int reg = mc->reg;
2800         unsigned int reg2 = mc->rreg;
2801         unsigned int shift = mc->shift;
2802         int max = mc->max;
2803         unsigned int mask = (1 << fls(max)) - 1;
2804         unsigned int invert = mc->invert;
2805
2806         ucontrol->value.integer.value[0] =
2807                 (snd_soc_read(codec, reg) >> shift) & mask;
2808         ucontrol->value.integer.value[1] =
2809                 (snd_soc_read(codec, reg2) >> shift) & mask;
2810         if (invert) {
2811                 ucontrol->value.integer.value[0] =
2812                         max - ucontrol->value.integer.value[0];
2813                 ucontrol->value.integer.value[1] =
2814                         max - ucontrol->value.integer.value[1];
2815         }
2816
2817         return 0;
2818 }
2819 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2820
2821 /**
2822  * snd_soc_put_volsw_2r - double mixer set callback
2823  * @kcontrol: mixer control
2824  * @ucontrol: control element information
2825  *
2826  * Callback to set the value of a double mixer control that spans 2 registers.
2827  *
2828  * Returns 0 for success.
2829  */
2830 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2831         struct snd_ctl_elem_value *ucontrol)
2832 {
2833         struct soc_mixer_control *mc =
2834                 (struct soc_mixer_control *)kcontrol->private_value;
2835         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2836         unsigned int reg = mc->reg;
2837         unsigned int reg2 = mc->rreg;
2838         unsigned int shift = mc->shift;
2839         int max = mc->max;
2840         unsigned int mask = (1 << fls(max)) - 1;
2841         unsigned int invert = mc->invert;
2842         int err;
2843         unsigned int val, val2, val_mask;
2844
2845         val_mask = mask << shift;
2846         val = (ucontrol->value.integer.value[0] & mask);
2847         val2 = (ucontrol->value.integer.value[1] & mask);
2848
2849         if (invert) {
2850                 val = max - val;
2851                 val2 = max - val2;
2852         }
2853
2854         val = val << shift;
2855         val2 = val2 << shift;
2856
2857         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2858         if (err < 0)
2859                 return err;
2860
2861         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2862         return err;
2863 }
2864 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2865
2866 /**
2867  * snd_soc_info_volsw_s8 - signed mixer info callback
2868  * @kcontrol: mixer control
2869  * @uinfo: control element information
2870  *
2871  * Callback to provide information about a signed mixer control.
2872  *
2873  * Returns 0 for success.
2874  */
2875 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2876         struct snd_ctl_elem_info *uinfo)
2877 {
2878         struct soc_mixer_control *mc =
2879                 (struct soc_mixer_control *)kcontrol->private_value;
2880         int platform_max;
2881         int min = mc->min;
2882
2883         if (!mc->platform_max)
2884                 mc->platform_max = mc->max;
2885         platform_max = mc->platform_max;
2886
2887         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2888         uinfo->count = 2;
2889         uinfo->value.integer.min = 0;
2890         uinfo->value.integer.max = platform_max - min;
2891         return 0;
2892 }
2893 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2894
2895 /**
2896  * snd_soc_get_volsw_s8 - signed mixer get callback
2897  * @kcontrol: mixer control
2898  * @ucontrol: control element information
2899  *
2900  * Callback to get the value of a signed mixer control.
2901  *
2902  * Returns 0 for success.
2903  */
2904 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2905         struct snd_ctl_elem_value *ucontrol)
2906 {
2907         struct soc_mixer_control *mc =
2908                 (struct soc_mixer_control *)kcontrol->private_value;
2909         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2910         unsigned int reg = mc->reg;
2911         int min = mc->min;
2912         int val = snd_soc_read(codec, reg);
2913
2914         ucontrol->value.integer.value[0] =
2915                 ((signed char)(val & 0xff))-min;
2916         ucontrol->value.integer.value[1] =
2917                 ((signed char)((val >> 8) & 0xff))-min;
2918         return 0;
2919 }
2920 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2921
2922 /**
2923  * snd_soc_put_volsw_sgn - signed mixer put callback
2924  * @kcontrol: mixer control
2925  * @ucontrol: control element information
2926  *
2927  * Callback to set the value of a signed mixer control.
2928  *
2929  * Returns 0 for success.
2930  */
2931 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2932         struct snd_ctl_elem_value *ucontrol)
2933 {
2934         struct soc_mixer_control *mc =
2935                 (struct soc_mixer_control *)kcontrol->private_value;
2936         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2937         unsigned int reg = mc->reg;
2938         int min = mc->min;
2939         unsigned int val;
2940
2941         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2942         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2943
2944         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2945 }
2946 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2947
2948 /**
2949  * snd_soc_limit_volume - Set new limit to an existing volume control.
2950  *
2951  * @codec: where to look for the control
2952  * @name: Name of the control
2953  * @max: new maximum limit
2954  *
2955  * Return 0 for success, else error.
2956  */
2957 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2958         const char *name, int max)
2959 {
2960         struct snd_card *card = codec->card->snd_card;
2961         struct snd_kcontrol *kctl;
2962         struct soc_mixer_control *mc;
2963         int found = 0;
2964         int ret = -EINVAL;
2965
2966         /* Sanity check for name and max */
2967         if (unlikely(!name || max <= 0))
2968                 return -EINVAL;
2969
2970         list_for_each_entry(kctl, &card->controls, list) {
2971                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2972                         found = 1;
2973                         break;
2974                 }
2975         }
2976         if (found) {
2977                 mc = (struct soc_mixer_control *)kctl->private_value;
2978                 if (max <= mc->max) {
2979                         mc->platform_max = max;
2980                         ret = 0;
2981                 }
2982         }
2983         return ret;
2984 }
2985 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2986
2987 /**
2988  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2989  *  mixer info callback
2990  * @kcontrol: mixer control
2991  * @uinfo: control element information
2992  *
2993  * Returns 0 for success.
2994  */
2995 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2996                         struct snd_ctl_elem_info *uinfo)
2997 {
2998         struct soc_mixer_control *mc =
2999                 (struct soc_mixer_control *)kcontrol->private_value;
3000         int max = mc->max;
3001         int min = mc->min;
3002
3003         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3004         uinfo->count = 2;
3005         uinfo->value.integer.min = 0;
3006         uinfo->value.integer.max = max-min;
3007
3008         return 0;
3009 }
3010 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3011
3012 /**
3013  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3014  *  mixer get callback
3015  * @kcontrol: mixer control
3016  * @uinfo: control element information
3017  *
3018  * Returns 0 for success.
3019  */
3020 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3021                         struct snd_ctl_elem_value *ucontrol)
3022 {
3023         struct soc_mixer_control *mc =
3024                 (struct soc_mixer_control *)kcontrol->private_value;
3025         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3026         unsigned int mask = (1<<mc->shift)-1;
3027         int min = mc->min;
3028         int val = snd_soc_read(codec, mc->reg) & mask;
3029         int valr = snd_soc_read(codec, mc->rreg) & mask;
3030
3031         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3032         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3033         return 0;
3034 }
3035 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3036
3037 /**
3038  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3039  *  mixer put callback
3040  * @kcontrol: mixer control
3041  * @uinfo: control element information
3042  *
3043  * Returns 0 for success.
3044  */
3045 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3046                         struct snd_ctl_elem_value *ucontrol)
3047 {
3048         struct soc_mixer_control *mc =
3049                 (struct soc_mixer_control *)kcontrol->private_value;
3050         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3051         unsigned int mask = (1<<mc->shift)-1;
3052         int min = mc->min;
3053         int ret;
3054         unsigned int val, valr, oval, ovalr;
3055
3056         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3057         val &= mask;
3058         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3059         valr &= mask;
3060
3061         oval = snd_soc_read(codec, mc->reg) & mask;
3062         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3063
3064         ret = 0;
3065         if (oval != val) {
3066                 ret = snd_soc_write(codec, mc->reg, val);
3067                 if (ret < 0)
3068                         return ret;
3069         }
3070         if (ovalr != valr) {
3071                 ret = snd_soc_write(codec, mc->rreg, valr);
3072                 if (ret < 0)
3073                         return ret;
3074         }
3075
3076         return 0;
3077 }
3078 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3079
3080 /**
3081  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3082  * @dai: DAI
3083  * @clk_id: DAI specific clock ID
3084  * @freq: new clock frequency in Hz
3085  * @dir: new clock direction - input/output.
3086  *
3087  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3088  */
3089 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3090         unsigned int freq, int dir)
3091 {
3092         if (dai->driver && dai->driver->ops->set_sysclk)
3093                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3094         else if (dai->codec && dai->codec->driver->set_sysclk)
3095                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3096                                                       freq, dir);
3097         else
3098                 return -EINVAL;
3099 }
3100 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3101
3102 /**
3103  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3104  * @codec: CODEC
3105  * @clk_id: DAI specific clock ID
3106  * @freq: new clock frequency in Hz
3107  * @dir: new clock direction - input/output.
3108  *
3109  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3110  */
3111 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3112         unsigned int freq, int dir)
3113 {
3114         if (codec->driver->set_sysclk)
3115                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3116         else
3117                 return -EINVAL;
3118 }
3119 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3120
3121 /**
3122  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3123  * @dai: DAI
3124  * @div_id: DAI specific clock divider ID
3125  * @div: new clock divisor.
3126  *
3127  * Configures the clock dividers. This is used to derive the best DAI bit and
3128  * frame clocks from the system or master clock. It's best to set the DAI bit
3129  * and frame clocks as low as possible to save system power.
3130  */
3131 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3132         int div_id, int div)
3133 {
3134         if (dai->driver && dai->driver->ops->set_clkdiv)
3135                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3136         else
3137                 return -EINVAL;
3138 }
3139 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3140
3141 /**
3142  * snd_soc_dai_set_pll - configure DAI PLL.
3143  * @dai: DAI
3144  * @pll_id: DAI specific PLL ID
3145  * @source: DAI specific source for the PLL
3146  * @freq_in: PLL input clock frequency in Hz
3147  * @freq_out: requested PLL output clock frequency in Hz
3148  *
3149  * Configures and enables PLL to generate output clock based on input clock.
3150  */
3151 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3152         unsigned int freq_in, unsigned int freq_out)
3153 {
3154         if (dai->driver && dai->driver->ops->set_pll)
3155                 return dai->driver->ops->set_pll(dai, pll_id, source,
3156                                          freq_in, freq_out);
3157         else if (dai->codec && dai->codec->driver->set_pll)
3158                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3159                                                    freq_in, freq_out);
3160         else
3161                 return -EINVAL;
3162 }
3163 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3164
3165 /*
3166  * snd_soc_codec_set_pll - configure codec PLL.
3167  * @codec: CODEC
3168  * @pll_id: DAI specific PLL ID
3169  * @source: DAI specific source for the PLL
3170  * @freq_in: PLL input clock frequency in Hz
3171  * @freq_out: requested PLL output clock frequency in Hz
3172  *
3173  * Configures and enables PLL to generate output clock based on input clock.
3174  */
3175 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3176                           unsigned int freq_in, unsigned int freq_out)
3177 {
3178         if (codec->driver->set_pll)
3179                 return codec->driver->set_pll(codec, pll_id, source,
3180                                               freq_in, freq_out);
3181         else
3182                 return -EINVAL;
3183 }
3184 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3185
3186 /**
3187  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3188  * @dai: DAI
3189  * @fmt: SND_SOC_DAIFMT_ format value.
3190  *
3191  * Configures the DAI hardware format and clocking.
3192  */
3193 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3194 {
3195         if (dai->driver && dai->driver->ops->set_fmt)
3196                 return dai->driver->ops->set_fmt(dai, fmt);
3197         else
3198                 return -EINVAL;
3199 }
3200 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3201
3202 /**
3203  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3204  * @dai: DAI
3205  * @tx_mask: bitmask representing active TX slots.
3206  * @rx_mask: bitmask representing active RX slots.
3207  * @slots: Number of slots in use.
3208  * @slot_width: Width in bits for each slot.
3209  *
3210  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3211  * specific.
3212  */
3213 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3214         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3215 {
3216         if (dai->driver && dai->driver->ops->set_tdm_slot)
3217                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3218                                 slots, slot_width);
3219         else
3220                 return -EINVAL;
3221 }
3222 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3223
3224 /**
3225  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3226  * @dai: DAI
3227  * @tx_num: how many TX channels
3228  * @tx_slot: pointer to an array which imply the TX slot number channel
3229  *           0~num-1 uses
3230  * @rx_num: how many RX channels
3231  * @rx_slot: pointer to an array which imply the RX slot number channel
3232  *           0~num-1 uses
3233  *
3234  * configure the relationship between channel number and TDM slot number.
3235  */
3236 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3237         unsigned int tx_num, unsigned int *tx_slot,
3238         unsigned int rx_num, unsigned int *rx_slot)
3239 {
3240         if (dai->driver && dai->driver->ops->set_channel_map)
3241                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3242                         rx_num, rx_slot);
3243         else
3244                 return -EINVAL;
3245 }
3246 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3247
3248 /**
3249  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3250  * @dai: DAI
3251  * @tristate: tristate enable
3252  *
3253  * Tristates the DAI so that others can use it.
3254  */
3255 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3256 {
3257         if (dai->driver && dai->driver->ops->set_tristate)
3258                 return dai->driver->ops->set_tristate(dai, tristate);
3259         else
3260                 return -EINVAL;
3261 }
3262 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3263
3264 /**
3265  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3266  * @dai: DAI
3267  * @mute: mute enable
3268  *
3269  * Mutes the DAI DAC.
3270  */
3271 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3272 {
3273         if (dai->driver && dai->driver->ops->digital_mute)
3274                 return dai->driver->ops->digital_mute(dai, mute);
3275         else
3276                 return -EINVAL;
3277 }
3278 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3279
3280 /**
3281  * snd_soc_register_card - Register a card with the ASoC core
3282  *
3283  * @card: Card to register
3284  *
3285  */
3286 int snd_soc_register_card(struct snd_soc_card *card)
3287 {
3288         int i;
3289
3290         if (!card->name || !card->dev)
3291                 return -EINVAL;
3292
3293         snd_soc_initialize_card_lists(card);
3294
3295         soc_init_card_debugfs(card);
3296
3297         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3298                             (card->num_links + card->num_aux_devs),
3299                             GFP_KERNEL);
3300         if (card->rtd == NULL)
3301                 return -ENOMEM;
3302         card->rtd_aux = &card->rtd[card->num_links];
3303
3304         for (i = 0; i < card->num_links; i++)
3305                 card->rtd[i].dai_link = &card->dai_link[i];
3306
3307         INIT_LIST_HEAD(&card->list);
3308         card->instantiated = 0;
3309         mutex_init(&card->mutex);
3310
3311         mutex_lock(&client_mutex);
3312         list_add(&card->list, &card_list);
3313         snd_soc_instantiate_cards();
3314         mutex_unlock(&client_mutex);
3315
3316         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3317
3318         return 0;
3319 }
3320 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3321
3322 /**
3323  * snd_soc_unregister_card - Unregister a card with the ASoC core
3324  *
3325  * @card: Card to unregister
3326  *
3327  */
3328 int snd_soc_unregister_card(struct snd_soc_card *card)
3329 {
3330         if (card->instantiated)
3331                 soc_cleanup_card_resources(card);
3332         mutex_lock(&client_mutex);
3333         list_del(&card->list);
3334         mutex_unlock(&client_mutex);
3335         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3336
3337         return 0;
3338 }
3339 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3340
3341 /*
3342  * Simplify DAI link configuration by removing ".-1" from device names
3343  * and sanitizing names.
3344  */
3345 static char *fmt_single_name(struct device *dev, int *id)
3346 {
3347         char *found, name[NAME_SIZE];
3348         int id1, id2;
3349
3350         if (dev_name(dev) == NULL)
3351                 return NULL;
3352
3353         strlcpy(name, dev_name(dev), NAME_SIZE);
3354
3355         /* are we a "%s.%d" name (platform and SPI components) */
3356         found = strstr(name, dev->driver->name);
3357         if (found) {
3358                 /* get ID */
3359                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3360
3361                         /* discard ID from name if ID == -1 */
3362                         if (*id == -1)
3363                                 found[strlen(dev->driver->name)] = '\0';
3364                 }
3365
3366         } else {
3367                 /* I2C component devices are named "bus-addr"  */
3368                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3369                         char tmp[NAME_SIZE];
3370
3371                         /* create unique ID number from I2C addr and bus */
3372                         *id = ((id1 & 0xffff) << 16) + id2;
3373
3374                         /* sanitize component name for DAI link creation */
3375                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3376                         strlcpy(name, tmp, NAME_SIZE);
3377                 } else
3378                         *id = 0;
3379         }
3380
3381         return kstrdup(name, GFP_KERNEL);
3382 }
3383
3384 /*
3385  * Simplify DAI link naming for single devices with multiple DAIs by removing
3386  * any ".-1" and using the DAI name (instead of device name).
3387  */
3388 static inline char *fmt_multiple_name(struct device *dev,
3389                 struct snd_soc_dai_driver *dai_drv)
3390 {
3391         if (dai_drv->name == NULL) {
3392                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3393                                 dev_name(dev));
3394                 return NULL;
3395         }
3396
3397         return kstrdup(dai_drv->name, GFP_KERNEL);
3398 }
3399
3400 /**
3401  * snd_soc_register_dai - Register a DAI with the ASoC core
3402  *
3403  * @dai: DAI to register
3404  */
3405 int snd_soc_register_dai(struct device *dev,
3406                 struct snd_soc_dai_driver *dai_drv)
3407 {
3408         struct snd_soc_dai *dai;
3409
3410         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3411
3412         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3413         if (dai == NULL)
3414                         return -ENOMEM;
3415
3416         /* create DAI component name */
3417         dai->name = fmt_single_name(dev, &dai->id);
3418         if (dai->name == NULL) {
3419                 kfree(dai);
3420                 return -ENOMEM;
3421         }
3422
3423         dai->dev = dev;
3424         dai->driver = dai_drv;
3425         if (!dai->driver->ops)
3426                 dai->driver->ops = &null_dai_ops;
3427
3428         mutex_lock(&client_mutex);
3429         list_add(&dai->list, &dai_list);
3430         snd_soc_instantiate_cards();
3431         mutex_unlock(&client_mutex);
3432
3433         pr_debug("Registered DAI '%s'\n", dai->name);
3434
3435         return 0;
3436 }
3437 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3438
3439 /**
3440  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3441  *
3442  * @dai: DAI to unregister
3443  */
3444 void snd_soc_unregister_dai(struct device *dev)
3445 {
3446         struct snd_soc_dai *dai;
3447
3448         list_for_each_entry(dai, &dai_list, list) {
3449                 if (dev == dai->dev)
3450                         goto found;
3451         }
3452         return;
3453
3454 found:
3455         mutex_lock(&client_mutex);
3456         list_del(&dai->list);
3457         mutex_unlock(&client_mutex);
3458
3459         pr_debug("Unregistered DAI '%s'\n", dai->name);
3460         kfree(dai->name);
3461         kfree(dai);
3462 }
3463 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3464
3465 /**
3466  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3467  *
3468  * @dai: Array of DAIs to register
3469  * @count: Number of DAIs
3470  */
3471 int snd_soc_register_dais(struct device *dev,
3472                 struct snd_soc_dai_driver *dai_drv, size_t count)
3473 {
3474         struct snd_soc_dai *dai;
3475         int i, ret = 0;
3476
3477         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3478
3479         for (i = 0; i < count; i++) {
3480
3481                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3482                 if (dai == NULL) {
3483                         ret = -ENOMEM;
3484                         goto err;
3485                 }
3486
3487                 /* create DAI component name */
3488                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3489                 if (dai->name == NULL) {
3490                         kfree(dai);
3491                         ret = -EINVAL;
3492                         goto err;
3493                 }
3494
3495                 dai->dev = dev;
3496                 dai->driver = &dai_drv[i];
3497                 if (dai->driver->id)
3498                         dai->id = dai->driver->id;
3499                 else
3500                         dai->id = i;
3501                 if (!dai->driver->ops)
3502                         dai->driver->ops = &null_dai_ops;
3503
3504                 mutex_lock(&client_mutex);
3505                 list_add(&dai->list, &dai_list);
3506                 mutex_unlock(&client_mutex);
3507
3508                 pr_debug("Registered DAI '%s'\n", dai->name);
3509         }
3510
3511         mutex_lock(&client_mutex);
3512         snd_soc_instantiate_cards();
3513         mutex_unlock(&client_mutex);
3514         return 0;
3515
3516 err:
3517         for (i--; i >= 0; i--)
3518                 snd_soc_unregister_dai(dev);
3519
3520         return ret;
3521 }
3522 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3523
3524 /**
3525  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3526  *
3527  * @dai: Array of DAIs to unregister
3528  * @count: Number of DAIs
3529  */
3530 void snd_soc_unregister_dais(struct device *dev, size_t count)
3531 {
3532         int i;
3533
3534         for (i = 0; i < count; i++)
3535                 snd_soc_unregister_dai(dev);
3536 }
3537 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3538
3539 /**
3540  * snd_soc_register_platform - Register a platform with the ASoC core
3541  *
3542  * @platform: platform to register
3543  */
3544 int snd_soc_register_platform(struct device *dev,
3545                 struct snd_soc_platform_driver *platform_drv)
3546 {
3547         struct snd_soc_platform *platform;
3548
3549         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3550
3551         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3552         if (platform == NULL)
3553                         return -ENOMEM;
3554
3555         /* create platform component name */
3556         platform->name = fmt_single_name(dev, &platform->id);
3557         if (platform->name == NULL) {
3558                 kfree(platform);
3559                 return -ENOMEM;
3560         }
3561
3562         platform->dev = dev;
3563         platform->driver = platform_drv;
3564
3565         mutex_lock(&client_mutex);
3566         list_add(&platform->list, &platform_list);
3567         snd_soc_instantiate_cards();
3568         mutex_unlock(&client_mutex);
3569
3570         pr_debug("Registered platform '%s'\n", platform->name);
3571
3572         return 0;
3573 }
3574 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3575
3576 /**
3577  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3578  *
3579  * @platform: platform to unregister
3580  */
3581 void snd_soc_unregister_platform(struct device *dev)
3582 {
3583         struct snd_soc_platform *platform;
3584
3585         list_for_each_entry(platform, &platform_list, list) {
3586                 if (dev == platform->dev)
3587                         goto found;
3588         }
3589         return;
3590
3591 found:
3592         mutex_lock(&client_mutex);
3593         list_del(&platform->list);
3594         mutex_unlock(&client_mutex);
3595
3596         pr_debug("Unregistered platform '%s'\n", platform->name);
3597         kfree(platform->name);
3598         kfree(platform);
3599 }
3600 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3601
3602 static u64 codec_format_map[] = {
3603         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3604         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3605         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3606         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3607         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3608         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3609         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3610         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3611         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3612         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3613         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3614         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3615         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3616         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3617         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3618         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3619 };
3620
3621 /* Fix up the DAI formats for endianness: codecs don't actually see
3622  * the endianness of the data but we're using the CPU format
3623  * definitions which do need to include endianness so we ensure that
3624  * codec DAIs always have both big and little endian variants set.
3625  */
3626 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3627 {
3628         int i;
3629
3630         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3631                 if (stream->formats & codec_format_map[i])
3632                         stream->formats |= codec_format_map[i];
3633 }
3634
3635 /**
3636  * snd_soc_register_codec - Register a codec with the ASoC core
3637  *
3638  * @codec: codec to register
3639  */
3640 int snd_soc_register_codec(struct device *dev,
3641                            const struct snd_soc_codec_driver *codec_drv,
3642                            struct snd_soc_dai_driver *dai_drv,
3643                            int num_dai)
3644 {
3645         size_t reg_size;
3646         struct snd_soc_codec *codec;
3647         int ret, i;
3648
3649         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3650
3651         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3652         if (codec == NULL)
3653                 return -ENOMEM;
3654
3655         /* create CODEC component name */
3656         codec->name = fmt_single_name(dev, &codec->id);
3657         if (codec->name == NULL) {
3658                 kfree(codec);
3659                 return -ENOMEM;
3660         }
3661
3662         if (codec_drv->compress_type)
3663                 codec->compress_type = codec_drv->compress_type;
3664         else
3665                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3666
3667         codec->write = codec_drv->write;
3668         codec->read = codec_drv->read;
3669         codec->volatile_register = codec_drv->volatile_register;
3670         codec->readable_register = codec_drv->readable_register;
3671         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3672         codec->dapm.dev = dev;
3673         codec->dapm.codec = codec;
3674         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3675         codec->dev = dev;
3676         codec->driver = codec_drv;
3677         codec->num_dai = num_dai;
3678         mutex_init(&codec->mutex);
3679
3680         /* allocate CODEC register cache */
3681         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3682                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3683                 codec->reg_size = reg_size;
3684                 /* it is necessary to make a copy of the default register cache
3685                  * because in the case of using a compression type that requires
3686                  * the default register cache to be marked as __devinitconst the
3687                  * kernel might have freed the array by the time we initialize
3688                  * the cache.
3689                  */
3690                 if (codec_drv->reg_cache_default) {
3691                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3692                                                       reg_size, GFP_KERNEL);
3693                         if (!codec->reg_def_copy) {
3694                                 ret = -ENOMEM;
3695                                 goto fail;
3696                         }
3697                 }
3698         }
3699
3700         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3701                 if (!codec->volatile_register)
3702                         codec->volatile_register = snd_soc_default_volatile_register;
3703                 if (!codec->readable_register)
3704                         codec->readable_register = snd_soc_default_readable_register;
3705         }
3706
3707         for (i = 0; i < num_dai; i++) {
3708                 fixup_codec_formats(&dai_drv[i].playback);
3709                 fixup_codec_formats(&dai_drv[i].capture);
3710         }
3711
3712         /* register any DAIs */
3713         if (num_dai) {
3714                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3715                 if (ret < 0)
3716                         goto fail;
3717         }
3718
3719         mutex_lock(&client_mutex);
3720         list_add(&codec->list, &codec_list);
3721         snd_soc_instantiate_cards();
3722         mutex_unlock(&client_mutex);
3723
3724         pr_debug("Registered codec '%s'\n", codec->name);
3725         return 0;
3726
3727 fail:
3728         kfree(codec->reg_def_copy);
3729         codec->reg_def_copy = NULL;
3730         kfree(codec->name);
3731         kfree(codec);
3732         return ret;
3733 }
3734 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3735
3736 /**
3737  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3738  *
3739  * @codec: codec to unregister
3740  */
3741 void snd_soc_unregister_codec(struct device *dev)
3742 {
3743         struct snd_soc_codec *codec;
3744         int i;
3745
3746         list_for_each_entry(codec, &codec_list, list) {
3747                 if (dev == codec->dev)
3748                         goto found;
3749         }
3750         return;
3751
3752 found:
3753         if (codec->num_dai)
3754                 for (i = 0; i < codec->num_dai; i++)
3755                         snd_soc_unregister_dai(dev);
3756
3757         mutex_lock(&client_mutex);
3758         list_del(&codec->list);
3759         mutex_unlock(&client_mutex);
3760
3761         pr_debug("Unregistered codec '%s'\n", codec->name);
3762
3763         snd_soc_cache_exit(codec);
3764         kfree(codec->reg_def_copy);
3765         kfree(codec->name);
3766         kfree(codec);
3767 }
3768 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3769
3770 static int __init snd_soc_init(void)
3771 {
3772 #ifdef CONFIG_DEBUG_FS
3773         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3774         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3775                 printk(KERN_WARNING
3776                        "ASoC: Failed to create debugfs directory\n");
3777                 snd_soc_debugfs_root = NULL;
3778         }
3779
3780         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3781                                  &codec_list_fops))
3782                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3783
3784         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3785                                  &dai_list_fops))
3786                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3787
3788         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3789                                  &platform_list_fops))
3790                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3791 #endif
3792
3793         return platform_driver_register(&soc_driver);
3794 }
3795 module_init(snd_soc_init);
3796
3797 static void __exit snd_soc_exit(void)
3798 {
3799 #ifdef CONFIG_DEBUG_FS
3800         debugfs_remove_recursive(snd_soc_debugfs_root);
3801 #endif
3802         platform_driver_unregister(&soc_driver);
3803 }
3804 module_exit(snd_soc_exit);
3805
3806 /* Module information */
3807 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3808 MODULE_DESCRIPTION("ALSA SoC Core");
3809 MODULE_LICENSE("GPL");
3810 MODULE_ALIAS("platform:soc-audio");