ASoC: Move DAPM debugfs directory creation to snd_soc_dapm_debugfs_init
[linux-2.6.git] / sound / soc / soc-core.c
1 /*
2  * soc-core.c  --  ALSA SoC Audio Layer
3  *
4  * Copyright 2005 Wolfson Microelectronics PLC.
5  * Copyright 2005 Openedhand Ltd.
6  * Copyright (C) 2010 Slimlogic Ltd.
7  * Copyright (C) 2010 Texas Instruments Inc.
8  *
9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10  *         with code, comments and ideas from :-
11  *         Richard Purdie <richard@openedhand.com>
12  *
13  *  This program is free software; you can redistribute  it and/or modify it
14  *  under  the terms of  the GNU General  Public License as published by the
15  *  Free Software Foundation;  either version 2 of the  License, or (at your
16  *  option) any later version.
17  *
18  *  TODO:
19  *   o Add hw rules to enforce rates, etc.
20  *   o More testing with other codecs/machines.
21  *   o Add more codecs and platforms to ensure good API coverage.
22  *   o Support TDM on PCM and I2S
23  */
24
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/slab.h>
34 #include <sound/ac97_codec.h>
35 #include <sound/core.h>
36 #include <sound/jack.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/initval.h>
41
42 #define CREATE_TRACE_POINTS
43 #include <trace/events/asoc.h>
44
45 #define NAME_SIZE       32
46
47 static DEFINE_MUTEX(pcm_mutex);
48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
49
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 #endif
54
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(card_list);
57 static LIST_HEAD(dai_list);
58 static LIST_HEAD(platform_list);
59 static LIST_HEAD(codec_list);
60
61 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
62
63 /*
64  * This is a timeout to do a DAPM powerdown after a stream is closed().
65  * It can be used to eliminate pops between different playback streams, e.g.
66  * between two audio tracks.
67  */
68 static int pmdown_time = 5000;
69 module_param(pmdown_time, int, 0);
70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72 /* returns the minimum number of bytes needed to represent
73  * a particular given value */
74 static int min_bytes_needed(unsigned long val)
75 {
76         int c = 0;
77         int i;
78
79         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80                 if (val & (1UL << i))
81                         break;
82         c = (sizeof val * 8) - c;
83         if (!c || (c % 8))
84                 c = (c + 8) / 8;
85         else
86                 c /= 8;
87         return c;
88 }
89
90 /* fill buf which is 'len' bytes with a formatted
91  * string of the form 'reg: value\n' */
92 static int format_register_str(struct snd_soc_codec *codec,
93                                unsigned int reg, char *buf, size_t len)
94 {
95         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96         int regsize = codec->driver->reg_word_size * 2;
97         int ret;
98         char tmpbuf[len + 1];
99         char regbuf[regsize + 1];
100
101         /* since tmpbuf is allocated on the stack, warn the callers if they
102          * try to abuse this function */
103         WARN_ON(len > 63);
104
105         /* +2 for ': ' and + 1 for '\n' */
106         if (wordsize + regsize + 2 + 1 != len)
107                 return -EINVAL;
108
109         ret = snd_soc_read(codec , reg);
110         if (ret < 0) {
111                 memset(regbuf, 'X', regsize);
112                 regbuf[regsize] = '\0';
113         } else {
114                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
115         }
116
117         /* prepare the buffer */
118         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119         /* copy it back to the caller without the '\0' */
120         memcpy(buf, tmpbuf, len);
121
122         return 0;
123 }
124
125 /* codec register dump */
126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127                                   size_t count, loff_t pos)
128 {
129         int i, step = 1;
130         int wordsize, regsize;
131         int len;
132         size_t total = 0;
133         loff_t p = 0;
134
135         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136         regsize = codec->driver->reg_word_size * 2;
137
138         len = wordsize + regsize + 2 + 1;
139
140         if (!codec->driver->reg_cache_size)
141                 return 0;
142
143         if (codec->driver->reg_cache_step)
144                 step = codec->driver->reg_cache_step;
145
146         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147                 if (codec->readable_register && !codec->readable_register(codec, i))
148                         continue;
149                 if (codec->driver->display_register) {
150                         count += codec->driver->display_register(codec, buf + count,
151                                                          PAGE_SIZE - count, i);
152                 } else {
153                         /* only support larger than PAGE_SIZE bytes debugfs
154                          * entries for the default case */
155                         if (p >= pos) {
156                                 if (total + len >= count - 1)
157                                         break;
158                                 format_register_str(codec, i, buf + total, len);
159                                 total += len;
160                         }
161                         p += len;
162                 }
163         }
164
165         total = min(total, count - 1);
166
167         return total;
168 }
169
170 static ssize_t codec_reg_show(struct device *dev,
171         struct device_attribute *attr, char *buf)
172 {
173         struct snd_soc_pcm_runtime *rtd =
174                         container_of(dev, struct snd_soc_pcm_runtime, dev);
175
176         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177 }
178
179 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
180
181 static ssize_t pmdown_time_show(struct device *dev,
182                                 struct device_attribute *attr, char *buf)
183 {
184         struct snd_soc_pcm_runtime *rtd =
185                         container_of(dev, struct snd_soc_pcm_runtime, dev);
186
187         return sprintf(buf, "%ld\n", rtd->pmdown_time);
188 }
189
190 static ssize_t pmdown_time_set(struct device *dev,
191                                struct device_attribute *attr,
192                                const char *buf, size_t count)
193 {
194         struct snd_soc_pcm_runtime *rtd =
195                         container_of(dev, struct snd_soc_pcm_runtime, dev);
196         int ret;
197
198         ret = strict_strtol(buf, 10, &rtd->pmdown_time);
199         if (ret)
200                 return ret;
201
202         return count;
203 }
204
205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206
207 #ifdef CONFIG_DEBUG_FS
208 static int codec_reg_open_file(struct inode *inode, struct file *file)
209 {
210         file->private_data = inode->i_private;
211         return 0;
212 }
213
214 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215                                    size_t count, loff_t *ppos)
216 {
217         ssize_t ret;
218         struct snd_soc_codec *codec = file->private_data;
219         char *buf;
220
221         if (*ppos < 0 || !count)
222                 return -EINVAL;
223
224         buf = kmalloc(count, GFP_KERNEL);
225         if (!buf)
226                 return -ENOMEM;
227
228         ret = soc_codec_reg_show(codec, buf, count, *ppos);
229         if (ret >= 0) {
230                 if (copy_to_user(user_buf, buf, ret)) {
231                         kfree(buf);
232                         return -EFAULT;
233                 }
234                 *ppos += ret;
235         }
236
237         kfree(buf);
238         return ret;
239 }
240
241 static ssize_t codec_reg_write_file(struct file *file,
242                 const char __user *user_buf, size_t count, loff_t *ppos)
243 {
244         char buf[32];
245         int buf_size;
246         char *start = buf;
247         unsigned long reg, value;
248         int step = 1;
249         struct snd_soc_codec *codec = file->private_data;
250
251         buf_size = min(count, (sizeof(buf)-1));
252         if (copy_from_user(buf, user_buf, buf_size))
253                 return -EFAULT;
254         buf[buf_size] = 0;
255
256         if (codec->driver->reg_cache_step)
257                 step = codec->driver->reg_cache_step;
258
259         while (*start == ' ')
260                 start++;
261         reg = simple_strtoul(start, &start, 16);
262         while (*start == ' ')
263                 start++;
264         if (strict_strtoul(start, 16, &value))
265                 return -EINVAL;
266
267         /* Userspace has been fiddling around behind the kernel's back */
268         add_taint(TAINT_USER);
269
270         snd_soc_write(codec, reg, value);
271         return buf_size;
272 }
273
274 static const struct file_operations codec_reg_fops = {
275         .open = codec_reg_open_file,
276         .read = codec_reg_read_file,
277         .write = codec_reg_write_file,
278         .llseek = default_llseek,
279 };
280
281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282 {
283         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284
285         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286                                                        debugfs_card_root);
287         if (!codec->debugfs_codec_root) {
288                 printk(KERN_WARNING
289                        "ASoC: Failed to create codec debugfs directory\n");
290                 return;
291         }
292
293         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294                             &codec->cache_sync);
295         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
296                             &codec->cache_only);
297
298         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299                                                  codec->debugfs_codec_root,
300                                                  codec, &codec_reg_fops);
301         if (!codec->debugfs_reg)
302                 printk(KERN_WARNING
303                        "ASoC: Failed to create codec register debugfs file\n");
304
305         snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
306 }
307
308 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309 {
310         debugfs_remove_recursive(codec->debugfs_codec_root);
311 }
312
313 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
314                                     size_t count, loff_t *ppos)
315 {
316         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
317         ssize_t len, ret = 0;
318         struct snd_soc_codec *codec;
319
320         if (!buf)
321                 return -ENOMEM;
322
323         list_for_each_entry(codec, &codec_list, list) {
324                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
325                                codec->name);
326                 if (len >= 0)
327                         ret += len;
328                 if (ret > PAGE_SIZE) {
329                         ret = PAGE_SIZE;
330                         break;
331                 }
332         }
333
334         if (ret >= 0)
335                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
336
337         kfree(buf);
338
339         return ret;
340 }
341
342 static const struct file_operations codec_list_fops = {
343         .read = codec_list_read_file,
344         .llseek = default_llseek,/* read accesses f_pos */
345 };
346
347 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
348                                   size_t count, loff_t *ppos)
349 {
350         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
351         ssize_t len, ret = 0;
352         struct snd_soc_dai *dai;
353
354         if (!buf)
355                 return -ENOMEM;
356
357         list_for_each_entry(dai, &dai_list, list) {
358                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
359                 if (len >= 0)
360                         ret += len;
361                 if (ret > PAGE_SIZE) {
362                         ret = PAGE_SIZE;
363                         break;
364                 }
365         }
366
367         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
368
369         kfree(buf);
370
371         return ret;
372 }
373
374 static const struct file_operations dai_list_fops = {
375         .read = dai_list_read_file,
376         .llseek = default_llseek,/* read accesses f_pos */
377 };
378
379 static ssize_t platform_list_read_file(struct file *file,
380                                        char __user *user_buf,
381                                        size_t count, loff_t *ppos)
382 {
383         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
384         ssize_t len, ret = 0;
385         struct snd_soc_platform *platform;
386
387         if (!buf)
388                 return -ENOMEM;
389
390         list_for_each_entry(platform, &platform_list, list) {
391                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
392                                platform->name);
393                 if (len >= 0)
394                         ret += len;
395                 if (ret > PAGE_SIZE) {
396                         ret = PAGE_SIZE;
397                         break;
398                 }
399         }
400
401         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403         kfree(buf);
404
405         return ret;
406 }
407
408 static const struct file_operations platform_list_fops = {
409         .read = platform_list_read_file,
410         .llseek = default_llseek,/* read accesses f_pos */
411 };
412
413 static void soc_init_card_debugfs(struct snd_soc_card *card)
414 {
415         card->debugfs_card_root = debugfs_create_dir(card->name,
416                                                      snd_soc_debugfs_root);
417         if (!card->debugfs_card_root) {
418                 dev_warn(card->dev,
419                          "ASoC: Failed to create codec debugfs directory\n");
420                 return;
421         }
422
423         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
424                                                     card->debugfs_card_root,
425                                                     &card->pop_time);
426         if (!card->debugfs_pop_time)
427                 dev_warn(card->dev,
428                        "Failed to create pop time debugfs file\n");
429 }
430
431 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
432 {
433         debugfs_remove_recursive(card->debugfs_card_root);
434 }
435
436 #else
437
438 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
439 {
440 }
441
442 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
443 {
444 }
445
446 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
447 {
448 }
449
450 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
451 {
452 }
453 #endif
454
455 #ifdef CONFIG_SND_SOC_AC97_BUS
456 /* unregister ac97 codec */
457 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
458 {
459         if (codec->ac97->dev.bus)
460                 device_unregister(&codec->ac97->dev);
461         return 0;
462 }
463
464 /* stop no dev release warning */
465 static void soc_ac97_device_release(struct device *dev){}
466
467 /* register ac97 codec to bus */
468 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
469 {
470         int err;
471
472         codec->ac97->dev.bus = &ac97_bus_type;
473         codec->ac97->dev.parent = codec->card->dev;
474         codec->ac97->dev.release = soc_ac97_device_release;
475
476         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
477                      codec->card->snd_card->number, 0, codec->name);
478         err = device_register(&codec->ac97->dev);
479         if (err < 0) {
480                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
481                 codec->ac97->dev.bus = NULL;
482                 return err;
483         }
484         return 0;
485 }
486 #endif
487
488 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
489 {
490         struct snd_soc_pcm_runtime *rtd = substream->private_data;
491         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
492         struct snd_soc_dai *codec_dai = rtd->codec_dai;
493         int ret;
494
495         if (!codec_dai->driver->symmetric_rates &&
496             !cpu_dai->driver->symmetric_rates &&
497             !rtd->dai_link->symmetric_rates)
498                 return 0;
499
500         /* This can happen if multiple streams are starting simultaneously -
501          * the second can need to get its constraints before the first has
502          * picked a rate.  Complain and allow the application to carry on.
503          */
504         if (!rtd->rate) {
505                 dev_warn(&rtd->dev,
506                          "Not enforcing symmetric_rates due to race\n");
507                 return 0;
508         }
509
510         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
511
512         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
513                                            SNDRV_PCM_HW_PARAM_RATE,
514                                            rtd->rate, rtd->rate);
515         if (ret < 0) {
516                 dev_err(&rtd->dev,
517                         "Unable to apply rate symmetry constraint: %d\n", ret);
518                 return ret;
519         }
520
521         return 0;
522 }
523
524 /*
525  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
526  * then initialized and any private data can be allocated. This also calls
527  * startup for the cpu DAI, platform, machine and codec DAI.
528  */
529 static int soc_pcm_open(struct snd_pcm_substream *substream)
530 {
531         struct snd_soc_pcm_runtime *rtd = substream->private_data;
532         struct snd_pcm_runtime *runtime = substream->runtime;
533         struct snd_soc_platform *platform = rtd->platform;
534         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
535         struct snd_soc_dai *codec_dai = rtd->codec_dai;
536         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
537         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
538         int ret = 0;
539
540         mutex_lock(&pcm_mutex);
541
542         /* startup the audio subsystem */
543         if (cpu_dai->driver->ops->startup) {
544                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
545                 if (ret < 0) {
546                         printk(KERN_ERR "asoc: can't open interface %s\n",
547                                 cpu_dai->name);
548                         goto out;
549                 }
550         }
551
552         if (platform->driver->ops && platform->driver->ops->open) {
553                 ret = platform->driver->ops->open(substream);
554                 if (ret < 0) {
555                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
556                         goto platform_err;
557                 }
558         }
559
560         if (codec_dai->driver->ops->startup) {
561                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
562                 if (ret < 0) {
563                         printk(KERN_ERR "asoc: can't open codec %s\n",
564                                 codec_dai->name);
565                         goto codec_dai_err;
566                 }
567         }
568
569         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
570                 ret = rtd->dai_link->ops->startup(substream);
571                 if (ret < 0) {
572                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
573                         goto machine_err;
574                 }
575         }
576
577         /* Check that the codec and cpu DAIs are compatible */
578         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
579                 runtime->hw.rate_min =
580                         max(codec_dai_drv->playback.rate_min,
581                             cpu_dai_drv->playback.rate_min);
582                 runtime->hw.rate_max =
583                         min(codec_dai_drv->playback.rate_max,
584                             cpu_dai_drv->playback.rate_max);
585                 runtime->hw.channels_min =
586                         max(codec_dai_drv->playback.channels_min,
587                                 cpu_dai_drv->playback.channels_min);
588                 runtime->hw.channels_max =
589                         min(codec_dai_drv->playback.channels_max,
590                                 cpu_dai_drv->playback.channels_max);
591                 runtime->hw.formats =
592                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
593                 runtime->hw.rates =
594                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
595                 if (codec_dai_drv->playback.rates
596                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
597                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
598                 if (cpu_dai_drv->playback.rates
599                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
600                         runtime->hw.rates |= codec_dai_drv->playback.rates;
601         } else {
602                 runtime->hw.rate_min =
603                         max(codec_dai_drv->capture.rate_min,
604                             cpu_dai_drv->capture.rate_min);
605                 runtime->hw.rate_max =
606                         min(codec_dai_drv->capture.rate_max,
607                             cpu_dai_drv->capture.rate_max);
608                 runtime->hw.channels_min =
609                         max(codec_dai_drv->capture.channels_min,
610                                 cpu_dai_drv->capture.channels_min);
611                 runtime->hw.channels_max =
612                         min(codec_dai_drv->capture.channels_max,
613                                 cpu_dai_drv->capture.channels_max);
614                 runtime->hw.formats =
615                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
616                 runtime->hw.rates =
617                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
618                 if (codec_dai_drv->capture.rates
619                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
620                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
621                 if (cpu_dai_drv->capture.rates
622                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
623                         runtime->hw.rates |= codec_dai_drv->capture.rates;
624         }
625
626         ret = -EINVAL;
627         snd_pcm_limit_hw_rates(runtime);
628         if (!runtime->hw.rates) {
629                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
630                         codec_dai->name, cpu_dai->name);
631                 goto config_err;
632         }
633         if (!runtime->hw.formats) {
634                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
635                         codec_dai->name, cpu_dai->name);
636                 goto config_err;
637         }
638         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
639             runtime->hw.channels_min > runtime->hw.channels_max) {
640                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
641                                 codec_dai->name, cpu_dai->name);
642                 goto config_err;
643         }
644
645         /* Symmetry only applies if we've already got an active stream. */
646         if (cpu_dai->active || codec_dai->active) {
647                 ret = soc_pcm_apply_symmetry(substream);
648                 if (ret != 0)
649                         goto config_err;
650         }
651
652         pr_debug("asoc: %s <-> %s info:\n",
653                         codec_dai->name, cpu_dai->name);
654         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
655         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
656                  runtime->hw.channels_max);
657         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
658                  runtime->hw.rate_max);
659
660         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
661                 cpu_dai->playback_active++;
662                 codec_dai->playback_active++;
663         } else {
664                 cpu_dai->capture_active++;
665                 codec_dai->capture_active++;
666         }
667         cpu_dai->active++;
668         codec_dai->active++;
669         rtd->codec->active++;
670         mutex_unlock(&pcm_mutex);
671         return 0;
672
673 config_err:
674         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
675                 rtd->dai_link->ops->shutdown(substream);
676
677 machine_err:
678         if (codec_dai->driver->ops->shutdown)
679                 codec_dai->driver->ops->shutdown(substream, codec_dai);
680
681 codec_dai_err:
682         if (platform->driver->ops && platform->driver->ops->close)
683                 platform->driver->ops->close(substream);
684
685 platform_err:
686         if (cpu_dai->driver->ops->shutdown)
687                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
688 out:
689         mutex_unlock(&pcm_mutex);
690         return ret;
691 }
692
693 /*
694  * Power down the audio subsystem pmdown_time msecs after close is called.
695  * This is to ensure there are no pops or clicks in between any music tracks
696  * due to DAPM power cycling.
697  */
698 static void close_delayed_work(struct work_struct *work)
699 {
700         struct snd_soc_pcm_runtime *rtd =
701                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
702         struct snd_soc_dai *codec_dai = rtd->codec_dai;
703
704         mutex_lock(&pcm_mutex);
705
706         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
707                  codec_dai->driver->playback.stream_name,
708                  codec_dai->playback_active ? "active" : "inactive",
709                  codec_dai->pop_wait ? "yes" : "no");
710
711         /* are we waiting on this codec DAI stream */
712         if (codec_dai->pop_wait == 1) {
713                 codec_dai->pop_wait = 0;
714                 snd_soc_dapm_stream_event(rtd,
715                         codec_dai->driver->playback.stream_name,
716                         SND_SOC_DAPM_STREAM_STOP);
717         }
718
719         mutex_unlock(&pcm_mutex);
720 }
721
722 /*
723  * Called by ALSA when a PCM substream is closed. Private data can be
724  * freed here. The cpu DAI, codec DAI, machine and platform are also
725  * shutdown.
726  */
727 static int soc_codec_close(struct snd_pcm_substream *substream)
728 {
729         struct snd_soc_pcm_runtime *rtd = substream->private_data;
730         struct snd_soc_platform *platform = rtd->platform;
731         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
732         struct snd_soc_dai *codec_dai = rtd->codec_dai;
733         struct snd_soc_codec *codec = rtd->codec;
734
735         mutex_lock(&pcm_mutex);
736
737         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
738                 cpu_dai->playback_active--;
739                 codec_dai->playback_active--;
740         } else {
741                 cpu_dai->capture_active--;
742                 codec_dai->capture_active--;
743         }
744
745         cpu_dai->active--;
746         codec_dai->active--;
747         codec->active--;
748
749         /* Muting the DAC suppresses artifacts caused during digital
750          * shutdown, for example from stopping clocks.
751          */
752         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
753                 snd_soc_dai_digital_mute(codec_dai, 1);
754
755         if (cpu_dai->driver->ops->shutdown)
756                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
757
758         if (codec_dai->driver->ops->shutdown)
759                 codec_dai->driver->ops->shutdown(substream, codec_dai);
760
761         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
762                 rtd->dai_link->ops->shutdown(substream);
763
764         if (platform->driver->ops && platform->driver->ops->close)
765                 platform->driver->ops->close(substream);
766         cpu_dai->runtime = NULL;
767
768         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
769                 /* start delayed pop wq here for playback streams */
770                 codec_dai->pop_wait = 1;
771                 schedule_delayed_work(&rtd->delayed_work,
772                         msecs_to_jiffies(rtd->pmdown_time));
773         } else {
774                 /* capture streams can be powered down now */
775                 snd_soc_dapm_stream_event(rtd,
776                         codec_dai->driver->capture.stream_name,
777                         SND_SOC_DAPM_STREAM_STOP);
778         }
779
780         mutex_unlock(&pcm_mutex);
781         return 0;
782 }
783
784 /*
785  * Called by ALSA when the PCM substream is prepared, can set format, sample
786  * rate, etc.  This function is non atomic and can be called multiple times,
787  * it can refer to the runtime info.
788  */
789 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
790 {
791         struct snd_soc_pcm_runtime *rtd = substream->private_data;
792         struct snd_soc_platform *platform = rtd->platform;
793         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
794         struct snd_soc_dai *codec_dai = rtd->codec_dai;
795         int ret = 0;
796
797         mutex_lock(&pcm_mutex);
798
799         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
800                 ret = rtd->dai_link->ops->prepare(substream);
801                 if (ret < 0) {
802                         printk(KERN_ERR "asoc: machine prepare error\n");
803                         goto out;
804                 }
805         }
806
807         if (platform->driver->ops && platform->driver->ops->prepare) {
808                 ret = platform->driver->ops->prepare(substream);
809                 if (ret < 0) {
810                         printk(KERN_ERR "asoc: platform prepare error\n");
811                         goto out;
812                 }
813         }
814
815         if (codec_dai->driver->ops->prepare) {
816                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
817                 if (ret < 0) {
818                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
819                         goto out;
820                 }
821         }
822
823         if (cpu_dai->driver->ops->prepare) {
824                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
825                 if (ret < 0) {
826                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
827                         goto out;
828                 }
829         }
830
831         /* cancel any delayed stream shutdown that is pending */
832         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
833             codec_dai->pop_wait) {
834                 codec_dai->pop_wait = 0;
835                 cancel_delayed_work(&rtd->delayed_work);
836         }
837
838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
839                 snd_soc_dapm_stream_event(rtd,
840                                           codec_dai->driver->playback.stream_name,
841                                           SND_SOC_DAPM_STREAM_START);
842         else
843                 snd_soc_dapm_stream_event(rtd,
844                                           codec_dai->driver->capture.stream_name,
845                                           SND_SOC_DAPM_STREAM_START);
846
847         snd_soc_dai_digital_mute(codec_dai, 0);
848
849 out:
850         mutex_unlock(&pcm_mutex);
851         return ret;
852 }
853
854 /*
855  * Called by ALSA when the hardware params are set by application. This
856  * function can also be called multiple times and can allocate buffers
857  * (using snd_pcm_lib_* ). It's non-atomic.
858  */
859 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
860                                 struct snd_pcm_hw_params *params)
861 {
862         struct snd_soc_pcm_runtime *rtd = substream->private_data;
863         struct snd_soc_platform *platform = rtd->platform;
864         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
865         struct snd_soc_dai *codec_dai = rtd->codec_dai;
866         int ret = 0;
867
868         mutex_lock(&pcm_mutex);
869
870         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
871                 ret = rtd->dai_link->ops->hw_params(substream, params);
872                 if (ret < 0) {
873                         printk(KERN_ERR "asoc: machine hw_params failed\n");
874                         goto out;
875                 }
876         }
877
878         if (codec_dai->driver->ops->hw_params) {
879                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
880                 if (ret < 0) {
881                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
882                                 codec_dai->name);
883                         goto codec_err;
884                 }
885         }
886
887         if (cpu_dai->driver->ops->hw_params) {
888                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
889                 if (ret < 0) {
890                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
891                                 cpu_dai->name);
892                         goto interface_err;
893                 }
894         }
895
896         if (platform->driver->ops && platform->driver->ops->hw_params) {
897                 ret = platform->driver->ops->hw_params(substream, params);
898                 if (ret < 0) {
899                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
900                                 platform->name);
901                         goto platform_err;
902                 }
903         }
904
905         rtd->rate = params_rate(params);
906
907 out:
908         mutex_unlock(&pcm_mutex);
909         return ret;
910
911 platform_err:
912         if (cpu_dai->driver->ops->hw_free)
913                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
914
915 interface_err:
916         if (codec_dai->driver->ops->hw_free)
917                 codec_dai->driver->ops->hw_free(substream, codec_dai);
918
919 codec_err:
920         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
921                 rtd->dai_link->ops->hw_free(substream);
922
923         mutex_unlock(&pcm_mutex);
924         return ret;
925 }
926
927 /*
928  * Frees resources allocated by hw_params, can be called multiple times
929  */
930 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
931 {
932         struct snd_soc_pcm_runtime *rtd = substream->private_data;
933         struct snd_soc_platform *platform = rtd->platform;
934         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
935         struct snd_soc_dai *codec_dai = rtd->codec_dai;
936         struct snd_soc_codec *codec = rtd->codec;
937
938         mutex_lock(&pcm_mutex);
939
940         /* apply codec digital mute */
941         if (!codec->active)
942                 snd_soc_dai_digital_mute(codec_dai, 1);
943
944         /* free any machine hw params */
945         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
946                 rtd->dai_link->ops->hw_free(substream);
947
948         /* free any DMA resources */
949         if (platform->driver->ops && platform->driver->ops->hw_free)
950                 platform->driver->ops->hw_free(substream);
951
952         /* now free hw params for the DAIs  */
953         if (codec_dai->driver->ops->hw_free)
954                 codec_dai->driver->ops->hw_free(substream, codec_dai);
955
956         if (cpu_dai->driver->ops->hw_free)
957                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
958
959         mutex_unlock(&pcm_mutex);
960         return 0;
961 }
962
963 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
964 {
965         struct snd_soc_pcm_runtime *rtd = substream->private_data;
966         struct snd_soc_platform *platform = rtd->platform;
967         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
968         struct snd_soc_dai *codec_dai = rtd->codec_dai;
969         int ret;
970
971         if (codec_dai->driver->ops->trigger) {
972                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
973                 if (ret < 0)
974                         return ret;
975         }
976
977         if (platform->driver->ops && platform->driver->ops->trigger) {
978                 ret = platform->driver->ops->trigger(substream, cmd);
979                 if (ret < 0)
980                         return ret;
981         }
982
983         if (cpu_dai->driver->ops->trigger) {
984                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
985                 if (ret < 0)
986                         return ret;
987         }
988         return 0;
989 }
990
991 /*
992  * soc level wrapper for pointer callback
993  * If cpu_dai, codec_dai, platform driver has the delay callback, than
994  * the runtime->delay will be updated accordingly.
995  */
996 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
997 {
998         struct snd_soc_pcm_runtime *rtd = substream->private_data;
999         struct snd_soc_platform *platform = rtd->platform;
1000         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1002         struct snd_pcm_runtime *runtime = substream->runtime;
1003         snd_pcm_uframes_t offset = 0;
1004         snd_pcm_sframes_t delay = 0;
1005
1006         if (platform->driver->ops && platform->driver->ops->pointer)
1007                 offset = platform->driver->ops->pointer(substream);
1008
1009         if (cpu_dai->driver->ops->delay)
1010                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1011
1012         if (codec_dai->driver->ops->delay)
1013                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1014
1015         if (platform->driver->delay)
1016                 delay += platform->driver->delay(substream, codec_dai);
1017
1018         runtime->delay = delay;
1019
1020         return offset;
1021 }
1022
1023 /* ASoC PCM operations */
1024 static struct snd_pcm_ops soc_pcm_ops = {
1025         .open           = soc_pcm_open,
1026         .close          = soc_codec_close,
1027         .hw_params      = soc_pcm_hw_params,
1028         .hw_free        = soc_pcm_hw_free,
1029         .prepare        = soc_pcm_prepare,
1030         .trigger        = soc_pcm_trigger,
1031         .pointer        = soc_pcm_pointer,
1032 };
1033
1034 #ifdef CONFIG_PM_SLEEP
1035 /* powers down audio subsystem for suspend */
1036 int snd_soc_suspend(struct device *dev)
1037 {
1038         struct snd_soc_card *card = dev_get_drvdata(dev);
1039         struct snd_soc_codec *codec;
1040         int i;
1041
1042         /* If the initialization of this soc device failed, there is no codec
1043          * associated with it. Just bail out in this case.
1044          */
1045         if (list_empty(&card->codec_dev_list))
1046                 return 0;
1047
1048         /* Due to the resume being scheduled into a workqueue we could
1049         * suspend before that's finished - wait for it to complete.
1050          */
1051         snd_power_lock(card->snd_card);
1052         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1053         snd_power_unlock(card->snd_card);
1054
1055         /* we're going to block userspace touching us until resume completes */
1056         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1057
1058         /* mute any active DACs */
1059         for (i = 0; i < card->num_rtd; i++) {
1060                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1061                 struct snd_soc_dai_driver *drv = dai->driver;
1062
1063                 if (card->rtd[i].dai_link->ignore_suspend)
1064                         continue;
1065
1066                 if (drv->ops->digital_mute && dai->playback_active)
1067                         drv->ops->digital_mute(dai, 1);
1068         }
1069
1070         /* suspend all pcms */
1071         for (i = 0; i < card->num_rtd; i++) {
1072                 if (card->rtd[i].dai_link->ignore_suspend)
1073                         continue;
1074
1075                 snd_pcm_suspend_all(card->rtd[i].pcm);
1076         }
1077
1078         if (card->suspend_pre)
1079                 card->suspend_pre(card);
1080
1081         for (i = 0; i < card->num_rtd; i++) {
1082                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1083                 struct snd_soc_platform *platform = card->rtd[i].platform;
1084
1085                 if (card->rtd[i].dai_link->ignore_suspend)
1086                         continue;
1087
1088                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1089                         cpu_dai->driver->suspend(cpu_dai);
1090                 if (platform->driver->suspend && !platform->suspended) {
1091                         platform->driver->suspend(cpu_dai);
1092                         platform->suspended = 1;
1093                 }
1094         }
1095
1096         /* close any waiting streams and save state */
1097         for (i = 0; i < card->num_rtd; i++) {
1098                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1099                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1100         }
1101
1102         for (i = 0; i < card->num_rtd; i++) {
1103                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1104
1105                 if (card->rtd[i].dai_link->ignore_suspend)
1106                         continue;
1107
1108                 if (driver->playback.stream_name != NULL)
1109                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1110                                 SND_SOC_DAPM_STREAM_SUSPEND);
1111
1112                 if (driver->capture.stream_name != NULL)
1113                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1114                                 SND_SOC_DAPM_STREAM_SUSPEND);
1115         }
1116
1117         /* suspend all CODECs */
1118         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1119                 /* If there are paths active then the CODEC will be held with
1120                  * bias _ON and should not be suspended. */
1121                 if (!codec->suspended && codec->driver->suspend) {
1122                         switch (codec->dapm.bias_level) {
1123                         case SND_SOC_BIAS_STANDBY:
1124                         case SND_SOC_BIAS_OFF:
1125                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1126                                 codec->suspended = 1;
1127                                 break;
1128                         default:
1129                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1130                                 break;
1131                         }
1132                 }
1133         }
1134
1135         for (i = 0; i < card->num_rtd; i++) {
1136                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1137
1138                 if (card->rtd[i].dai_link->ignore_suspend)
1139                         continue;
1140
1141                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1142                         cpu_dai->driver->suspend(cpu_dai);
1143         }
1144
1145         if (card->suspend_post)
1146                 card->suspend_post(card);
1147
1148         return 0;
1149 }
1150 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1151
1152 /* deferred resume work, so resume can complete before we finished
1153  * setting our codec back up, which can be very slow on I2C
1154  */
1155 static void soc_resume_deferred(struct work_struct *work)
1156 {
1157         struct snd_soc_card *card =
1158                         container_of(work, struct snd_soc_card, deferred_resume_work);
1159         struct snd_soc_codec *codec;
1160         int i;
1161
1162         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1163          * so userspace apps are blocked from touching us
1164          */
1165
1166         dev_dbg(card->dev, "starting resume work\n");
1167
1168         /* Bring us up into D2 so that DAPM starts enabling things */
1169         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1170
1171         if (card->resume_pre)
1172                 card->resume_pre(card);
1173
1174         /* resume AC97 DAIs */
1175         for (i = 0; i < card->num_rtd; i++) {
1176                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1177
1178                 if (card->rtd[i].dai_link->ignore_suspend)
1179                         continue;
1180
1181                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1182                         cpu_dai->driver->resume(cpu_dai);
1183         }
1184
1185         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1186                 /* If the CODEC was idle over suspend then it will have been
1187                  * left with bias OFF or STANDBY and suspended so we must now
1188                  * resume.  Otherwise the suspend was suppressed.
1189                  */
1190                 if (codec->driver->resume && codec->suspended) {
1191                         switch (codec->dapm.bias_level) {
1192                         case SND_SOC_BIAS_STANDBY:
1193                         case SND_SOC_BIAS_OFF:
1194                                 codec->driver->resume(codec);
1195                                 codec->suspended = 0;
1196                                 break;
1197                         default:
1198                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1199                                 break;
1200                         }
1201                 }
1202         }
1203
1204         for (i = 0; i < card->num_rtd; i++) {
1205                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1206
1207                 if (card->rtd[i].dai_link->ignore_suspend)
1208                         continue;
1209
1210                 if (driver->playback.stream_name != NULL)
1211                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1212                                 SND_SOC_DAPM_STREAM_RESUME);
1213
1214                 if (driver->capture.stream_name != NULL)
1215                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1216                                 SND_SOC_DAPM_STREAM_RESUME);
1217         }
1218
1219         /* unmute any active DACs */
1220         for (i = 0; i < card->num_rtd; i++) {
1221                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1222                 struct snd_soc_dai_driver *drv = dai->driver;
1223
1224                 if (card->rtd[i].dai_link->ignore_suspend)
1225                         continue;
1226
1227                 if (drv->ops->digital_mute && dai->playback_active)
1228                         drv->ops->digital_mute(dai, 0);
1229         }
1230
1231         for (i = 0; i < card->num_rtd; i++) {
1232                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1233                 struct snd_soc_platform *platform = card->rtd[i].platform;
1234
1235                 if (card->rtd[i].dai_link->ignore_suspend)
1236                         continue;
1237
1238                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1239                         cpu_dai->driver->resume(cpu_dai);
1240                 if (platform->driver->resume && platform->suspended) {
1241                         platform->driver->resume(cpu_dai);
1242                         platform->suspended = 0;
1243                 }
1244         }
1245
1246         if (card->resume_post)
1247                 card->resume_post(card);
1248
1249         dev_dbg(card->dev, "resume work completed\n");
1250
1251         /* userspace can access us now we are back as we were before */
1252         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1253 }
1254
1255 /* powers up audio subsystem after a suspend */
1256 int snd_soc_resume(struct device *dev)
1257 {
1258         struct snd_soc_card *card = dev_get_drvdata(dev);
1259         int i;
1260
1261         /* AC97 devices might have other drivers hanging off them so
1262          * need to resume immediately.  Other drivers don't have that
1263          * problem and may take a substantial amount of time to resume
1264          * due to I/O costs and anti-pop so handle them out of line.
1265          */
1266         for (i = 0; i < card->num_rtd; i++) {
1267                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1268                 if (cpu_dai->driver->ac97_control) {
1269                         dev_dbg(dev, "Resuming AC97 immediately\n");
1270                         soc_resume_deferred(&card->deferred_resume_work);
1271                 } else {
1272                         dev_dbg(dev, "Scheduling resume work\n");
1273                         if (!schedule_work(&card->deferred_resume_work))
1274                                 dev_err(dev, "resume work item may be lost\n");
1275                 }
1276         }
1277
1278         return 0;
1279 }
1280 EXPORT_SYMBOL_GPL(snd_soc_resume);
1281 #else
1282 #define snd_soc_suspend NULL
1283 #define snd_soc_resume NULL
1284 #endif
1285
1286 static struct snd_soc_dai_ops null_dai_ops = {
1287 };
1288
1289 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1290 {
1291         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1292         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1293         struct snd_soc_codec *codec;
1294         struct snd_soc_platform *platform;
1295         struct snd_soc_dai *codec_dai, *cpu_dai;
1296         const char *platform_name;
1297
1298         if (rtd->complete)
1299                 return 1;
1300         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1301
1302         /* do we already have the CPU DAI for this link ? */
1303         if (rtd->cpu_dai) {
1304                 goto find_codec;
1305         }
1306         /* no, then find CPU DAI from registered DAIs*/
1307         list_for_each_entry(cpu_dai, &dai_list, list) {
1308                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1309
1310                         if (!try_module_get(cpu_dai->dev->driver->owner))
1311                                 return -ENODEV;
1312
1313                         rtd->cpu_dai = cpu_dai;
1314                         goto find_codec;
1315                 }
1316         }
1317         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1318                         dai_link->cpu_dai_name);
1319
1320 find_codec:
1321         /* do we already have the CODEC for this link ? */
1322         if (rtd->codec) {
1323                 goto find_platform;
1324         }
1325
1326         /* no, then find CODEC from registered CODECs*/
1327         list_for_each_entry(codec, &codec_list, list) {
1328                 if (!strcmp(codec->name, dai_link->codec_name)) {
1329                         rtd->codec = codec;
1330
1331                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1332                         list_for_each_entry(codec_dai, &dai_list, list) {
1333                                 if (codec->dev == codec_dai->dev &&
1334                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1335                                         rtd->codec_dai = codec_dai;
1336                                         goto find_platform;
1337                                 }
1338                         }
1339                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1340                                         dai_link->codec_dai_name);
1341
1342                         goto find_platform;
1343                 }
1344         }
1345         dev_dbg(card->dev, "CODEC %s not registered\n",
1346                         dai_link->codec_name);
1347
1348 find_platform:
1349         /* do we need a platform? */
1350         if (rtd->platform)
1351                 goto out;
1352
1353         /* if there's no platform we match on the empty platform */
1354         platform_name = dai_link->platform_name;
1355         if (!platform_name)
1356                 platform_name = "snd-soc-dummy";
1357
1358         /* no, then find one from the set of registered platforms */
1359         list_for_each_entry(platform, &platform_list, list) {
1360                 if (!strcmp(platform->name, 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_remove_dai_links(struct snd_soc_card *card)
1457 {
1458         int i;
1459
1460         for (i = 0; i < card->num_rtd; i++)
1461                 soc_remove_dai_link(card, i);
1462
1463         card->num_rtd = 0;
1464 }
1465
1466 static void soc_set_name_prefix(struct snd_soc_card *card,
1467                                 struct snd_soc_codec *codec)
1468 {
1469         int i;
1470
1471         if (card->codec_conf == NULL)
1472                 return;
1473
1474         for (i = 0; i < card->num_configs; i++) {
1475                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1476                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1477                         codec->name_prefix = map->name_prefix;
1478                         break;
1479                 }
1480         }
1481 }
1482
1483 static int soc_probe_codec(struct snd_soc_card *card,
1484                            struct snd_soc_codec *codec)
1485 {
1486         int ret = 0;
1487         const struct snd_soc_codec_driver *driver = codec->driver;
1488
1489         codec->card = card;
1490         codec->dapm.card = card;
1491         soc_set_name_prefix(card, codec);
1492
1493         if (!try_module_get(codec->dev->driver->owner))
1494                 return -ENODEV;
1495
1496         if (driver->probe) {
1497                 ret = driver->probe(codec);
1498                 if (ret < 0) {
1499                         dev_err(codec->dev,
1500                                 "asoc: failed to probe CODEC %s: %d\n",
1501                                 codec->name, ret);
1502                         goto err_probe;
1503                 }
1504         }
1505
1506         if (driver->controls)
1507                 snd_soc_add_controls(codec, driver->controls,
1508                                      driver->num_controls);
1509         if (driver->dapm_widgets)
1510                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1511                                           driver->num_dapm_widgets);
1512         if (driver->dapm_routes)
1513                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1514                                         driver->num_dapm_routes);
1515
1516         soc_init_codec_debugfs(codec);
1517
1518         /* mark codec as probed and add to card codec list */
1519         codec->probed = 1;
1520         list_add(&codec->card_list, &card->codec_dev_list);
1521         list_add(&codec->dapm.list, &card->dapm_list);
1522
1523         return 0;
1524
1525 err_probe:
1526         module_put(codec->dev->driver->owner);
1527
1528         return ret;
1529 }
1530
1531 static void rtd_release(struct device *dev) {}
1532
1533 static int soc_post_component_init(struct snd_soc_card *card,
1534                                    struct snd_soc_codec *codec,
1535                                    int num, int dailess)
1536 {
1537         struct snd_soc_dai_link *dai_link = NULL;
1538         struct snd_soc_aux_dev *aux_dev = NULL;
1539         struct snd_soc_pcm_runtime *rtd;
1540         const char *temp, *name;
1541         int ret = 0;
1542
1543         if (!dailess) {
1544                 dai_link = &card->dai_link[num];
1545                 rtd = &card->rtd[num];
1546                 name = dai_link->name;
1547         } else {
1548                 aux_dev = &card->aux_dev[num];
1549                 rtd = &card->rtd_aux[num];
1550                 name = aux_dev->name;
1551         }
1552         rtd->card = card;
1553
1554         /* machine controls, routes and widgets are not prefixed */
1555         temp = codec->name_prefix;
1556         codec->name_prefix = NULL;
1557
1558         /* do machine specific initialization */
1559         if (!dailess && dai_link->init)
1560                 ret = dai_link->init(rtd);
1561         else if (dailess && aux_dev->init)
1562                 ret = aux_dev->init(&codec->dapm);
1563         if (ret < 0) {
1564                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1565                 return ret;
1566         }
1567         codec->name_prefix = temp;
1568
1569         /* Make sure all DAPM widgets are instantiated */
1570         snd_soc_dapm_new_widgets(&codec->dapm);
1571
1572         /* register the rtd device */
1573         rtd->codec = codec;
1574         rtd->dev.parent = card->dev;
1575         rtd->dev.release = rtd_release;
1576         rtd->dev.init_name = name;
1577         ret = device_register(&rtd->dev);
1578         if (ret < 0) {
1579                 dev_err(card->dev,
1580                         "asoc: failed to register runtime device: %d\n", ret);
1581                 return ret;
1582         }
1583         rtd->dev_registered = 1;
1584
1585         /* add DAPM sysfs entries for this codec */
1586         ret = snd_soc_dapm_sys_add(&rtd->dev);
1587         if (ret < 0)
1588                 dev_err(codec->dev,
1589                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1590                         ret);
1591
1592         /* add codec sysfs entries */
1593         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1594         if (ret < 0)
1595                 dev_err(codec->dev,
1596                         "asoc: failed to add codec sysfs files: %d\n", ret);
1597
1598         return 0;
1599 }
1600
1601 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1602 {
1603         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1604         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1605         struct snd_soc_codec *codec = rtd->codec;
1606         struct snd_soc_platform *platform = rtd->platform;
1607         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1608         int ret;
1609
1610         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1611
1612         /* config components */
1613         codec_dai->codec = codec;
1614         cpu_dai->platform = platform;
1615         codec_dai->card = card;
1616         cpu_dai->card = card;
1617
1618         /* set default power off timeout */
1619         rtd->pmdown_time = pmdown_time;
1620
1621         /* probe the cpu_dai */
1622         if (!cpu_dai->probed) {
1623                 if (cpu_dai->driver->probe) {
1624                         ret = cpu_dai->driver->probe(cpu_dai);
1625                         if (ret < 0) {
1626                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1627                                                 cpu_dai->name);
1628                                 return ret;
1629                         }
1630                 }
1631                 cpu_dai->probed = 1;
1632                 /* mark cpu_dai as probed and add to card cpu_dai list */
1633                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1634         }
1635
1636         /* probe the CODEC */
1637         if (!codec->probed) {
1638                 ret = soc_probe_codec(card, codec);
1639                 if (ret < 0)
1640                         return ret;
1641         }
1642
1643         /* probe the platform */
1644         if (!platform->probed) {
1645                 if (!try_module_get(platform->dev->driver->owner))
1646                         return -ENODEV;
1647
1648                 if (platform->driver->probe) {
1649                         ret = platform->driver->probe(platform);
1650                         if (ret < 0) {
1651                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1652                                                 platform->name);
1653                                 module_put(platform->dev->driver->owner);
1654                                 return ret;
1655                         }
1656                 }
1657                 /* mark platform as probed and add to card platform list */
1658                 platform->probed = 1;
1659                 list_add(&platform->card_list, &card->platform_dev_list);
1660         }
1661
1662         /* probe the CODEC DAI */
1663         if (!codec_dai->probed) {
1664                 if (codec_dai->driver->probe) {
1665                         ret = codec_dai->driver->probe(codec_dai);
1666                         if (ret < 0) {
1667                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1668                                                 codec_dai->name);
1669                                 return ret;
1670                         }
1671                 }
1672
1673                 /* mark cpu_dai as probed and add to card cpu_dai list */
1674                 codec_dai->probed = 1;
1675                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1676         }
1677
1678         /* DAPM dai link stream work */
1679         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1680
1681         ret = soc_post_component_init(card, codec, num, 0);
1682         if (ret)
1683                 return ret;
1684
1685         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1686         if (ret < 0)
1687                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1688
1689         /* create the pcm */
1690         ret = soc_new_pcm(rtd, num);
1691         if (ret < 0) {
1692                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1693                 return ret;
1694         }
1695
1696         /* add platform data for AC97 devices */
1697         if (rtd->codec_dai->driver->ac97_control)
1698                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1699
1700         return 0;
1701 }
1702
1703 #ifdef CONFIG_SND_SOC_AC97_BUS
1704 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1705 {
1706         int ret;
1707
1708         /* Only instantiate AC97 if not already done by the adaptor
1709          * for the generic AC97 subsystem.
1710          */
1711         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1712                 /*
1713                  * It is possible that the AC97 device is already registered to
1714                  * the device subsystem. This happens when the device is created
1715                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1716                  * is the generic AC97 glue but others migh emerge.
1717                  *
1718                  * In those cases we don't try to register the device again.
1719                  */
1720                 if (!rtd->codec->ac97_created)
1721                         return 0;
1722
1723                 ret = soc_ac97_dev_register(rtd->codec);
1724                 if (ret < 0) {
1725                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1726                         return ret;
1727                 }
1728
1729                 rtd->codec->ac97_registered = 1;
1730         }
1731         return 0;
1732 }
1733
1734 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1735 {
1736         if (codec->ac97_registered) {
1737                 soc_ac97_dev_unregister(codec);
1738                 codec->ac97_registered = 0;
1739         }
1740 }
1741 #endif
1742
1743 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1744 {
1745         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1746         struct snd_soc_codec *codec;
1747         int ret = -ENODEV;
1748
1749         /* find CODEC from registered CODECs*/
1750         list_for_each_entry(codec, &codec_list, list) {
1751                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1752                         if (codec->probed) {
1753                                 dev_err(codec->dev,
1754                                         "asoc: codec already probed");
1755                                 ret = -EBUSY;
1756                                 goto out;
1757                         }
1758                         goto found;
1759                 }
1760         }
1761         /* codec not found */
1762         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1763         goto out;
1764
1765 found:
1766         ret = soc_probe_codec(card, codec);
1767         if (ret < 0)
1768                 return ret;
1769
1770         ret = soc_post_component_init(card, codec, num, 1);
1771
1772 out:
1773         return ret;
1774 }
1775
1776 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1777 {
1778         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1779         struct snd_soc_codec *codec = rtd->codec;
1780
1781         /* unregister the rtd device */
1782         if (rtd->dev_registered) {
1783                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1784                 device_unregister(&rtd->dev);
1785                 rtd->dev_registered = 0;
1786         }
1787
1788         if (codec && codec->probed)
1789                 soc_remove_codec(codec);
1790 }
1791
1792 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1793                                     enum snd_soc_compress_type compress_type)
1794 {
1795         int ret;
1796
1797         if (codec->cache_init)
1798                 return 0;
1799
1800         /* override the compress_type if necessary */
1801         if (compress_type && codec->compress_type != compress_type)
1802                 codec->compress_type = compress_type;
1803         ret = snd_soc_cache_init(codec);
1804         if (ret < 0) {
1805                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1806                         ret);
1807                 return ret;
1808         }
1809         codec->cache_init = 1;
1810         return 0;
1811 }
1812
1813 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1814 {
1815         struct snd_soc_codec *codec;
1816         struct snd_soc_codec_conf *codec_conf;
1817         enum snd_soc_compress_type compress_type;
1818         int ret, i;
1819
1820         mutex_lock(&card->mutex);
1821
1822         if (card->instantiated) {
1823                 mutex_unlock(&card->mutex);
1824                 return;
1825         }
1826
1827         /* bind DAIs */
1828         for (i = 0; i < card->num_links; i++)
1829                 soc_bind_dai_link(card, i);
1830
1831         /* bind completed ? */
1832         if (card->num_rtd != card->num_links) {
1833                 mutex_unlock(&card->mutex);
1834                 return;
1835         }
1836
1837         /* initialize the register cache for each available codec */
1838         list_for_each_entry(codec, &codec_list, list) {
1839                 if (codec->cache_init)
1840                         continue;
1841                 /* by default we don't override the compress_type */
1842                 compress_type = 0;
1843                 /* check to see if we need to override the compress_type */
1844                 for (i = 0; i < card->num_configs; ++i) {
1845                         codec_conf = &card->codec_conf[i];
1846                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1847                                 compress_type = codec_conf->compress_type;
1848                                 if (compress_type && compress_type
1849                                     != codec->compress_type)
1850                                         break;
1851                         }
1852                 }
1853                 ret = snd_soc_init_codec_cache(codec, compress_type);
1854                 if (ret < 0) {
1855                         mutex_unlock(&card->mutex);
1856                         return;
1857                 }
1858         }
1859
1860         /* card bind complete so register a sound card */
1861         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1862                         card->owner, 0, &card->snd_card);
1863         if (ret < 0) {
1864                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1865                         card->name);
1866                 mutex_unlock(&card->mutex);
1867                 return;
1868         }
1869         card->snd_card->dev = card->dev;
1870
1871         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1872         card->dapm.dev = card->dev;
1873         card->dapm.card = card;
1874         list_add(&card->dapm.list, &card->dapm_list);
1875
1876 #ifdef CONFIG_PM_SLEEP
1877         /* deferred resume work */
1878         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1879 #endif
1880
1881         if (card->dapm_widgets)
1882                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1883                                           card->num_dapm_widgets);
1884
1885         /* initialise the sound card only once */
1886         if (card->probe) {
1887                 ret = card->probe(card);
1888                 if (ret < 0)
1889                         goto card_probe_error;
1890         }
1891
1892         for (i = 0; i < card->num_links; i++) {
1893                 ret = soc_probe_dai_link(card, i);
1894                 if (ret < 0) {
1895                         pr_err("asoc: failed to instantiate card %s: %d\n",
1896                                card->name, ret);
1897                         goto probe_dai_err;
1898                 }
1899         }
1900
1901         for (i = 0; i < card->num_aux_devs; i++) {
1902                 ret = soc_probe_aux_dev(card, i);
1903                 if (ret < 0) {
1904                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1905                                card->name, ret);
1906                         goto probe_aux_dev_err;
1907                 }
1908         }
1909
1910         /* We should have a non-codec control add function but we don't */
1911         if (card->controls)
1912                 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1913                                                       struct snd_soc_codec,
1914                                                       card_list),
1915                                      card->controls,
1916                                      card->num_controls);
1917
1918         if (card->dapm_routes)
1919                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1920                                         card->num_dapm_routes);
1921
1922 #ifdef CONFIG_DEBUG_FS
1923         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1924 #endif
1925
1926         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1927                  "%s",  card->name);
1928         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1929                  "%s", card->name);
1930
1931         if (card->late_probe) {
1932                 ret = card->late_probe(card);
1933                 if (ret < 0) {
1934                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1935                                 card->name, ret);
1936                         goto probe_aux_dev_err;
1937                 }
1938         }
1939
1940         ret = snd_card_register(card->snd_card);
1941         if (ret < 0) {
1942                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1943                 goto probe_aux_dev_err;
1944         }
1945
1946 #ifdef CONFIG_SND_SOC_AC97_BUS
1947         /* register any AC97 codecs */
1948         for (i = 0; i < card->num_rtd; i++) {
1949                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1950                 if (ret < 0) {
1951                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1952                         while (--i >= 0)
1953                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1954                         goto probe_aux_dev_err;
1955                 }
1956         }
1957 #endif
1958
1959         card->instantiated = 1;
1960         mutex_unlock(&card->mutex);
1961         return;
1962
1963 probe_aux_dev_err:
1964         for (i = 0; i < card->num_aux_devs; i++)
1965                 soc_remove_aux_dev(card, i);
1966
1967 probe_dai_err:
1968         soc_remove_dai_links(card);
1969
1970 card_probe_error:
1971         if (card->remove)
1972                 card->remove(card);
1973
1974         snd_card_free(card->snd_card);
1975
1976         mutex_unlock(&card->mutex);
1977 }
1978
1979 /*
1980  * Attempt to initialise any uninitialised cards.  Must be called with
1981  * client_mutex.
1982  */
1983 static void snd_soc_instantiate_cards(void)
1984 {
1985         struct snd_soc_card *card;
1986         list_for_each_entry(card, &card_list, list)
1987                 snd_soc_instantiate_card(card);
1988 }
1989
1990 /* probes a new socdev */
1991 static int soc_probe(struct platform_device *pdev)
1992 {
1993         struct snd_soc_card *card = platform_get_drvdata(pdev);
1994         int ret = 0;
1995
1996         /*
1997          * no card, so machine driver should be registering card
1998          * we should not be here in that case so ret error
1999          */
2000         if (!card)
2001                 return -EINVAL;
2002
2003         /* Bodge while we unpick instantiation */
2004         card->dev = &pdev->dev;
2005
2006         ret = snd_soc_register_card(card);
2007         if (ret != 0) {
2008                 dev_err(&pdev->dev, "Failed to register card\n");
2009                 return ret;
2010         }
2011
2012         return 0;
2013 }
2014
2015 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2016 {
2017         int i;
2018
2019         /* make sure any delayed work runs */
2020         for (i = 0; i < card->num_rtd; i++) {
2021                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2022                 flush_delayed_work_sync(&rtd->delayed_work);
2023         }
2024
2025         /* remove auxiliary devices */
2026         for (i = 0; i < card->num_aux_devs; i++)
2027                 soc_remove_aux_dev(card, i);
2028
2029         /* remove and free each DAI */
2030         soc_remove_dai_links(card);
2031
2032         soc_cleanup_card_debugfs(card);
2033
2034         /* remove the card */
2035         if (card->remove)
2036                 card->remove(card);
2037
2038         snd_soc_dapm_free(&card->dapm);
2039
2040         kfree(card->rtd);
2041         snd_card_free(card->snd_card);
2042         return 0;
2043
2044 }
2045
2046 /* removes a socdev */
2047 static int soc_remove(struct platform_device *pdev)
2048 {
2049         struct snd_soc_card *card = platform_get_drvdata(pdev);
2050
2051         snd_soc_unregister_card(card);
2052         return 0;
2053 }
2054
2055 int snd_soc_poweroff(struct device *dev)
2056 {
2057         struct snd_soc_card *card = dev_get_drvdata(dev);
2058         int i;
2059
2060         if (!card->instantiated)
2061                 return 0;
2062
2063         /* Flush out pmdown_time work - we actually do want to run it
2064          * now, we're shutting down so no imminent restart. */
2065         for (i = 0; i < card->num_rtd; i++) {
2066                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2067                 flush_delayed_work_sync(&rtd->delayed_work);
2068         }
2069
2070         snd_soc_dapm_shutdown(card);
2071
2072         return 0;
2073 }
2074 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2075
2076 const struct dev_pm_ops snd_soc_pm_ops = {
2077         .suspend = snd_soc_suspend,
2078         .resume = snd_soc_resume,
2079         .poweroff = snd_soc_poweroff,
2080 };
2081 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2082
2083 /* ASoC platform driver */
2084 static struct platform_driver soc_driver = {
2085         .driver         = {
2086                 .name           = "soc-audio",
2087                 .owner          = THIS_MODULE,
2088                 .pm             = &snd_soc_pm_ops,
2089         },
2090         .probe          = soc_probe,
2091         .remove         = soc_remove,
2092 };
2093
2094 /* create a new pcm */
2095 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2096 {
2097         struct snd_soc_codec *codec = rtd->codec;
2098         struct snd_soc_platform *platform = rtd->platform;
2099         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2100         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2101         struct snd_pcm *pcm;
2102         char new_name[64];
2103         int ret = 0, playback = 0, capture = 0;
2104
2105         /* check client and interface hw capabilities */
2106         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2107                         rtd->dai_link->stream_name, codec_dai->name, num);
2108
2109         if (codec_dai->driver->playback.channels_min)
2110                 playback = 1;
2111         if (codec_dai->driver->capture.channels_min)
2112                 capture = 1;
2113
2114         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2115         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2116                         num, playback, capture, &pcm);
2117         if (ret < 0) {
2118                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2119                 return ret;
2120         }
2121
2122         rtd->pcm = pcm;
2123         pcm->private_data = rtd;
2124         if (platform->driver->ops) {
2125                 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2126                 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2127                 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2128                 soc_pcm_ops.copy = platform->driver->ops->copy;
2129                 soc_pcm_ops.silence = platform->driver->ops->silence;
2130                 soc_pcm_ops.ack = platform->driver->ops->ack;
2131                 soc_pcm_ops.page = platform->driver->ops->page;
2132         }
2133
2134         if (playback)
2135                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2136
2137         if (capture)
2138                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2139
2140         if (platform->driver->pcm_new) {
2141                 ret = platform->driver->pcm_new(rtd->card->snd_card,
2142                                                 codec_dai, pcm);
2143                 if (ret < 0) {
2144                         pr_err("asoc: platform pcm constructor failed\n");
2145                         return ret;
2146                 }
2147         }
2148
2149         pcm->private_free = platform->driver->pcm_free;
2150         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2151                 cpu_dai->name);
2152         return ret;
2153 }
2154
2155 /**
2156  * snd_soc_codec_volatile_register: Report if a register is volatile.
2157  *
2158  * @codec: CODEC to query.
2159  * @reg: Register to query.
2160  *
2161  * Boolean function indiciating if a CODEC register is volatile.
2162  */
2163 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2164                                     unsigned int reg)
2165 {
2166         if (codec->volatile_register)
2167                 return codec->volatile_register(codec, reg);
2168         else
2169                 return 0;
2170 }
2171 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2172
2173 /**
2174  * snd_soc_codec_readable_register: Report if a register is readable.
2175  *
2176  * @codec: CODEC to query.
2177  * @reg: Register to query.
2178  *
2179  * Boolean function indicating if a CODEC register is readable.
2180  */
2181 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2182                                     unsigned int reg)
2183 {
2184         if (codec->readable_register)
2185                 return codec->readable_register(codec, reg);
2186         else
2187                 return 0;
2188 }
2189 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2190
2191 /**
2192  * snd_soc_codec_writable_register: Report if a register is writable.
2193  *
2194  * @codec: CODEC to query.
2195  * @reg: Register to query.
2196  *
2197  * Boolean function indicating if a CODEC register is writable.
2198  */
2199 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2200                                     unsigned int reg)
2201 {
2202         if (codec->writable_register)
2203                 return codec->writable_register(codec, reg);
2204         else
2205                 return 0;
2206 }
2207 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2208
2209 /**
2210  * snd_soc_new_ac97_codec - initailise AC97 device
2211  * @codec: audio codec
2212  * @ops: AC97 bus operations
2213  * @num: AC97 codec number
2214  *
2215  * Initialises AC97 codec resources for use by ad-hoc devices only.
2216  */
2217 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2218         struct snd_ac97_bus_ops *ops, int num)
2219 {
2220         mutex_lock(&codec->mutex);
2221
2222         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2223         if (codec->ac97 == NULL) {
2224                 mutex_unlock(&codec->mutex);
2225                 return -ENOMEM;
2226         }
2227
2228         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2229         if (codec->ac97->bus == NULL) {
2230                 kfree(codec->ac97);
2231                 codec->ac97 = NULL;
2232                 mutex_unlock(&codec->mutex);
2233                 return -ENOMEM;
2234         }
2235
2236         codec->ac97->bus->ops = ops;
2237         codec->ac97->num = num;
2238
2239         /*
2240          * Mark the AC97 device to be created by us. This way we ensure that the
2241          * device will be registered with the device subsystem later on.
2242          */
2243         codec->ac97_created = 1;
2244
2245         mutex_unlock(&codec->mutex);
2246         return 0;
2247 }
2248 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2249
2250 /**
2251  * snd_soc_free_ac97_codec - free AC97 codec device
2252  * @codec: audio codec
2253  *
2254  * Frees AC97 codec device resources.
2255  */
2256 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2257 {
2258         mutex_lock(&codec->mutex);
2259 #ifdef CONFIG_SND_SOC_AC97_BUS
2260         soc_unregister_ac97_dai_link(codec);
2261 #endif
2262         kfree(codec->ac97->bus);
2263         kfree(codec->ac97);
2264         codec->ac97 = NULL;
2265         codec->ac97_created = 0;
2266         mutex_unlock(&codec->mutex);
2267 }
2268 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2269
2270 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2271 {
2272         unsigned int ret;
2273
2274         ret = codec->read(codec, reg);
2275         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2276         trace_snd_soc_reg_read(codec, reg, ret);
2277
2278         return ret;
2279 }
2280 EXPORT_SYMBOL_GPL(snd_soc_read);
2281
2282 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2283                            unsigned int reg, unsigned int val)
2284 {
2285         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2286         trace_snd_soc_reg_write(codec, reg, val);
2287         return codec->write(codec, reg, val);
2288 }
2289 EXPORT_SYMBOL_GPL(snd_soc_write);
2290
2291 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2292                                     unsigned int reg, const void *data, size_t len)
2293 {
2294         return codec->bulk_write_raw(codec, reg, data, len);
2295 }
2296 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2297
2298 /**
2299  * snd_soc_update_bits - update codec register bits
2300  * @codec: audio codec
2301  * @reg: codec register
2302  * @mask: register mask
2303  * @value: new value
2304  *
2305  * Writes new register value.
2306  *
2307  * Returns 1 for change, 0 for no change, or negative error code.
2308  */
2309 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2310                                 unsigned int mask, unsigned int value)
2311 {
2312         int change;
2313         unsigned int old, new;
2314         int ret;
2315
2316         ret = snd_soc_read(codec, reg);
2317         if (ret < 0)
2318                 return ret;
2319
2320         old = ret;
2321         new = (old & ~mask) | value;
2322         change = old != new;
2323         if (change) {
2324                 ret = snd_soc_write(codec, reg, new);
2325                 if (ret < 0)
2326                         return ret;
2327         }
2328
2329         return change;
2330 }
2331 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2332
2333 /**
2334  * snd_soc_update_bits_locked - update codec register bits
2335  * @codec: audio codec
2336  * @reg: codec register
2337  * @mask: register mask
2338  * @value: new value
2339  *
2340  * Writes new register value, and takes the codec mutex.
2341  *
2342  * Returns 1 for change else 0.
2343  */
2344 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2345                                unsigned short reg, unsigned int mask,
2346                                unsigned int value)
2347 {
2348         int change;
2349
2350         mutex_lock(&codec->mutex);
2351         change = snd_soc_update_bits(codec, reg, mask, value);
2352         mutex_unlock(&codec->mutex);
2353
2354         return change;
2355 }
2356 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2357
2358 /**
2359  * snd_soc_test_bits - test register for change
2360  * @codec: audio codec
2361  * @reg: codec register
2362  * @mask: register mask
2363  * @value: new value
2364  *
2365  * Tests a register with a new value and checks if the new value is
2366  * different from the old value.
2367  *
2368  * Returns 1 for change else 0.
2369  */
2370 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2371                                 unsigned int mask, unsigned int value)
2372 {
2373         int change;
2374         unsigned int old, new;
2375
2376         old = snd_soc_read(codec, reg);
2377         new = (old & ~mask) | value;
2378         change = old != new;
2379
2380         return change;
2381 }
2382 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2383
2384 /**
2385  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2386  * @substream: the pcm substream
2387  * @hw: the hardware parameters
2388  *
2389  * Sets the substream runtime hardware parameters.
2390  */
2391 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2392         const struct snd_pcm_hardware *hw)
2393 {
2394         struct snd_pcm_runtime *runtime = substream->runtime;
2395         runtime->hw.info = hw->info;
2396         runtime->hw.formats = hw->formats;
2397         runtime->hw.period_bytes_min = hw->period_bytes_min;
2398         runtime->hw.period_bytes_max = hw->period_bytes_max;
2399         runtime->hw.periods_min = hw->periods_min;
2400         runtime->hw.periods_max = hw->periods_max;
2401         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2402         runtime->hw.fifo_size = hw->fifo_size;
2403         return 0;
2404 }
2405 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2406
2407 /**
2408  * snd_soc_cnew - create new control
2409  * @_template: control template
2410  * @data: control private data
2411  * @long_name: control long name
2412  * @prefix: control name prefix
2413  *
2414  * Create a new mixer control from a template control.
2415  *
2416  * Returns 0 for success, else error.
2417  */
2418 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2419                                   void *data, char *long_name,
2420                                   const char *prefix)
2421 {
2422         struct snd_kcontrol_new template;
2423         struct snd_kcontrol *kcontrol;
2424         char *name = NULL;
2425         int name_len;
2426
2427         memcpy(&template, _template, sizeof(template));
2428         template.index = 0;
2429
2430         if (!long_name)
2431                 long_name = template.name;
2432
2433         if (prefix) {
2434                 name_len = strlen(long_name) + strlen(prefix) + 2;
2435                 name = kmalloc(name_len, GFP_ATOMIC);
2436                 if (!name)
2437                         return NULL;
2438
2439                 snprintf(name, name_len, "%s %s", prefix, long_name);
2440
2441                 template.name = name;
2442         } else {
2443                 template.name = long_name;
2444         }
2445
2446         kcontrol = snd_ctl_new1(&template, data);
2447
2448         kfree(name);
2449
2450         return kcontrol;
2451 }
2452 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2453
2454 /**
2455  * snd_soc_add_controls - add an array of controls to a codec.
2456  * Convienience function to add a list of controls. Many codecs were
2457  * duplicating this code.
2458  *
2459  * @codec: codec to add controls to
2460  * @controls: array of controls to add
2461  * @num_controls: number of elements in the array
2462  *
2463  * Return 0 for success, else error.
2464  */
2465 int snd_soc_add_controls(struct snd_soc_codec *codec,
2466         const struct snd_kcontrol_new *controls, int num_controls)
2467 {
2468         struct snd_card *card = codec->card->snd_card;
2469         int err, i;
2470
2471         for (i = 0; i < num_controls; i++) {
2472                 const struct snd_kcontrol_new *control = &controls[i];
2473                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2474                                                      control->name,
2475                                                      codec->name_prefix));
2476                 if (err < 0) {
2477                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2478                                 codec->name, control->name, err);
2479                         return err;
2480                 }
2481         }
2482
2483         return 0;
2484 }
2485 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2486
2487 /**
2488  * snd_soc_info_enum_double - enumerated double mixer info callback
2489  * @kcontrol: mixer control
2490  * @uinfo: control element information
2491  *
2492  * Callback to provide information about a double enumerated
2493  * mixer control.
2494  *
2495  * Returns 0 for success.
2496  */
2497 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2498         struct snd_ctl_elem_info *uinfo)
2499 {
2500         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2501
2502         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2503         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2504         uinfo->value.enumerated.items = e->max;
2505
2506         if (uinfo->value.enumerated.item > e->max - 1)
2507                 uinfo->value.enumerated.item = e->max - 1;
2508         strcpy(uinfo->value.enumerated.name,
2509                 e->texts[uinfo->value.enumerated.item]);
2510         return 0;
2511 }
2512 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2513
2514 /**
2515  * snd_soc_get_enum_double - enumerated double mixer get callback
2516  * @kcontrol: mixer control
2517  * @ucontrol: control element information
2518  *
2519  * Callback to get the value of a double enumerated mixer.
2520  *
2521  * Returns 0 for success.
2522  */
2523 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2524         struct snd_ctl_elem_value *ucontrol)
2525 {
2526         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2527         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2528         unsigned int val, bitmask;
2529
2530         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2531                 ;
2532         val = snd_soc_read(codec, e->reg);
2533         ucontrol->value.enumerated.item[0]
2534                 = (val >> e->shift_l) & (bitmask - 1);
2535         if (e->shift_l != e->shift_r)
2536                 ucontrol->value.enumerated.item[1] =
2537                         (val >> e->shift_r) & (bitmask - 1);
2538
2539         return 0;
2540 }
2541 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2542
2543 /**
2544  * snd_soc_put_enum_double - enumerated double mixer put callback
2545  * @kcontrol: mixer control
2546  * @ucontrol: control element information
2547  *
2548  * Callback to set the value of a double enumerated mixer.
2549  *
2550  * Returns 0 for success.
2551  */
2552 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2553         struct snd_ctl_elem_value *ucontrol)
2554 {
2555         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2556         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2557         unsigned int val;
2558         unsigned int mask, bitmask;
2559
2560         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2561                 ;
2562         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2563                 return -EINVAL;
2564         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2565         mask = (bitmask - 1) << e->shift_l;
2566         if (e->shift_l != e->shift_r) {
2567                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2568                         return -EINVAL;
2569                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2570                 mask |= (bitmask - 1) << e->shift_r;
2571         }
2572
2573         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2574 }
2575 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2576
2577 /**
2578  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2579  * @kcontrol: mixer control
2580  * @ucontrol: control element information
2581  *
2582  * Callback to get the value of a double semi enumerated mixer.
2583  *
2584  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2585  * used for handling bitfield coded enumeration for example.
2586  *
2587  * Returns 0 for success.
2588  */
2589 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2590         struct snd_ctl_elem_value *ucontrol)
2591 {
2592         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2593         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2594         unsigned int reg_val, val, mux;
2595
2596         reg_val = snd_soc_read(codec, e->reg);
2597         val = (reg_val >> e->shift_l) & e->mask;
2598         for (mux = 0; mux < e->max; mux++) {
2599                 if (val == e->values[mux])
2600                         break;
2601         }
2602         ucontrol->value.enumerated.item[0] = mux;
2603         if (e->shift_l != e->shift_r) {
2604                 val = (reg_val >> e->shift_r) & e->mask;
2605                 for (mux = 0; mux < e->max; mux++) {
2606                         if (val == e->values[mux])
2607                                 break;
2608                 }
2609                 ucontrol->value.enumerated.item[1] = mux;
2610         }
2611
2612         return 0;
2613 }
2614 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2615
2616 /**
2617  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2618  * @kcontrol: mixer control
2619  * @ucontrol: control element information
2620  *
2621  * Callback to set the value of a double semi enumerated mixer.
2622  *
2623  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2624  * used for handling bitfield coded enumeration for example.
2625  *
2626  * Returns 0 for success.
2627  */
2628 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2629         struct snd_ctl_elem_value *ucontrol)
2630 {
2631         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2632         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2633         unsigned int val;
2634         unsigned int mask;
2635
2636         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2637                 return -EINVAL;
2638         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2639         mask = e->mask << e->shift_l;
2640         if (e->shift_l != e->shift_r) {
2641                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2642                         return -EINVAL;
2643                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2644                 mask |= e->mask << e->shift_r;
2645         }
2646
2647         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2648 }
2649 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2650
2651 /**
2652  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2653  * @kcontrol: mixer control
2654  * @uinfo: control element information
2655  *
2656  * Callback to provide information about an external enumerated
2657  * single mixer.
2658  *
2659  * Returns 0 for success.
2660  */
2661 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2662         struct snd_ctl_elem_info *uinfo)
2663 {
2664         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2665
2666         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2667         uinfo->count = 1;
2668         uinfo->value.enumerated.items = e->max;
2669
2670         if (uinfo->value.enumerated.item > e->max - 1)
2671                 uinfo->value.enumerated.item = e->max - 1;
2672         strcpy(uinfo->value.enumerated.name,
2673                 e->texts[uinfo->value.enumerated.item]);
2674         return 0;
2675 }
2676 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2677
2678 /**
2679  * snd_soc_info_volsw_ext - external single mixer info callback
2680  * @kcontrol: mixer control
2681  * @uinfo: control element information
2682  *
2683  * Callback to provide information about a single external mixer control.
2684  *
2685  * Returns 0 for success.
2686  */
2687 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2688         struct snd_ctl_elem_info *uinfo)
2689 {
2690         int max = kcontrol->private_value;
2691
2692         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2693                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2694         else
2695                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2696
2697         uinfo->count = 1;
2698         uinfo->value.integer.min = 0;
2699         uinfo->value.integer.max = max;
2700         return 0;
2701 }
2702 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2703
2704 /**
2705  * snd_soc_info_volsw - single mixer info callback
2706  * @kcontrol: mixer control
2707  * @uinfo: control element information
2708  *
2709  * Callback to provide information about a single mixer control.
2710  *
2711  * Returns 0 for success.
2712  */
2713 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2714         struct snd_ctl_elem_info *uinfo)
2715 {
2716         struct soc_mixer_control *mc =
2717                 (struct soc_mixer_control *)kcontrol->private_value;
2718         int platform_max;
2719         unsigned int shift = mc->shift;
2720         unsigned int rshift = mc->rshift;
2721
2722         if (!mc->platform_max)
2723                 mc->platform_max = mc->max;
2724         platform_max = mc->platform_max;
2725
2726         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2727                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2728         else
2729                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2730
2731         uinfo->count = shift == rshift ? 1 : 2;
2732         uinfo->value.integer.min = 0;
2733         uinfo->value.integer.max = platform_max;
2734         return 0;
2735 }
2736 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2737
2738 /**
2739  * snd_soc_get_volsw - single mixer get callback
2740  * @kcontrol: mixer control
2741  * @ucontrol: control element information
2742  *
2743  * Callback to get the value of a single mixer control.
2744  *
2745  * Returns 0 for success.
2746  */
2747 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2748         struct snd_ctl_elem_value *ucontrol)
2749 {
2750         struct soc_mixer_control *mc =
2751                 (struct soc_mixer_control *)kcontrol->private_value;
2752         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2753         unsigned int reg = mc->reg;
2754         unsigned int shift = mc->shift;
2755         unsigned int rshift = mc->rshift;
2756         int max = mc->max;
2757         unsigned int mask = (1 << fls(max)) - 1;
2758         unsigned int invert = mc->invert;
2759
2760         ucontrol->value.integer.value[0] =
2761                 (snd_soc_read(codec, reg) >> shift) & mask;
2762         if (shift != rshift)
2763                 ucontrol->value.integer.value[1] =
2764                         (snd_soc_read(codec, reg) >> rshift) & mask;
2765         if (invert) {
2766                 ucontrol->value.integer.value[0] =
2767                         max - ucontrol->value.integer.value[0];
2768                 if (shift != rshift)
2769                         ucontrol->value.integer.value[1] =
2770                                 max - ucontrol->value.integer.value[1];
2771         }
2772
2773         return 0;
2774 }
2775 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2776
2777 /**
2778  * snd_soc_put_volsw - single mixer put callback
2779  * @kcontrol: mixer control
2780  * @ucontrol: control element information
2781  *
2782  * Callback to set the value of a single mixer control.
2783  *
2784  * Returns 0 for success.
2785  */
2786 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2787         struct snd_ctl_elem_value *ucontrol)
2788 {
2789         struct soc_mixer_control *mc =
2790                 (struct soc_mixer_control *)kcontrol->private_value;
2791         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2792         unsigned int reg = mc->reg;
2793         unsigned int shift = mc->shift;
2794         unsigned int rshift = mc->rshift;
2795         int max = mc->max;
2796         unsigned int mask = (1 << fls(max)) - 1;
2797         unsigned int invert = mc->invert;
2798         unsigned int val, val2, val_mask;
2799
2800         val = (ucontrol->value.integer.value[0] & mask);
2801         if (invert)
2802                 val = max - val;
2803         val_mask = mask << shift;
2804         val = val << shift;
2805         if (shift != rshift) {
2806                 val2 = (ucontrol->value.integer.value[1] & mask);
2807                 if (invert)
2808                         val2 = max - val2;
2809                 val_mask |= mask << rshift;
2810                 val |= val2 << rshift;
2811         }
2812         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2813 }
2814 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2815
2816 /**
2817  * snd_soc_info_volsw_2r - double mixer info callback
2818  * @kcontrol: mixer control
2819  * @uinfo: control element information
2820  *
2821  * Callback to provide information about a double mixer control that
2822  * spans 2 codec registers.
2823  *
2824  * Returns 0 for success.
2825  */
2826 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2827         struct snd_ctl_elem_info *uinfo)
2828 {
2829         struct soc_mixer_control *mc =
2830                 (struct soc_mixer_control *)kcontrol->private_value;
2831         int platform_max;
2832
2833         if (!mc->platform_max)
2834                 mc->platform_max = mc->max;
2835         platform_max = mc->platform_max;
2836
2837         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2838                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2839         else
2840                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2841
2842         uinfo->count = 2;
2843         uinfo->value.integer.min = 0;
2844         uinfo->value.integer.max = platform_max;
2845         return 0;
2846 }
2847 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2848
2849 /**
2850  * snd_soc_get_volsw_2r - double mixer get callback
2851  * @kcontrol: mixer control
2852  * @ucontrol: control element information
2853  *
2854  * Callback to get the value of a double mixer control that spans 2 registers.
2855  *
2856  * Returns 0 for success.
2857  */
2858 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2859         struct snd_ctl_elem_value *ucontrol)
2860 {
2861         struct soc_mixer_control *mc =
2862                 (struct soc_mixer_control *)kcontrol->private_value;
2863         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2864         unsigned int reg = mc->reg;
2865         unsigned int reg2 = mc->rreg;
2866         unsigned int shift = mc->shift;
2867         int max = mc->max;
2868         unsigned int mask = (1 << fls(max)) - 1;
2869         unsigned int invert = mc->invert;
2870
2871         ucontrol->value.integer.value[0] =
2872                 (snd_soc_read(codec, reg) >> shift) & mask;
2873         ucontrol->value.integer.value[1] =
2874                 (snd_soc_read(codec, reg2) >> shift) & mask;
2875         if (invert) {
2876                 ucontrol->value.integer.value[0] =
2877                         max - ucontrol->value.integer.value[0];
2878                 ucontrol->value.integer.value[1] =
2879                         max - ucontrol->value.integer.value[1];
2880         }
2881
2882         return 0;
2883 }
2884 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2885
2886 /**
2887  * snd_soc_put_volsw_2r - double mixer set callback
2888  * @kcontrol: mixer control
2889  * @ucontrol: control element information
2890  *
2891  * Callback to set the value of a double mixer control that spans 2 registers.
2892  *
2893  * Returns 0 for success.
2894  */
2895 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2896         struct snd_ctl_elem_value *ucontrol)
2897 {
2898         struct soc_mixer_control *mc =
2899                 (struct soc_mixer_control *)kcontrol->private_value;
2900         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2901         unsigned int reg = mc->reg;
2902         unsigned int reg2 = mc->rreg;
2903         unsigned int shift = mc->shift;
2904         int max = mc->max;
2905         unsigned int mask = (1 << fls(max)) - 1;
2906         unsigned int invert = mc->invert;
2907         int err;
2908         unsigned int val, val2, val_mask;
2909
2910         val_mask = mask << shift;
2911         val = (ucontrol->value.integer.value[0] & mask);
2912         val2 = (ucontrol->value.integer.value[1] & mask);
2913
2914         if (invert) {
2915                 val = max - val;
2916                 val2 = max - val2;
2917         }
2918
2919         val = val << shift;
2920         val2 = val2 << shift;
2921
2922         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2923         if (err < 0)
2924                 return err;
2925
2926         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2927         return err;
2928 }
2929 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2930
2931 /**
2932  * snd_soc_info_volsw_s8 - signed mixer info callback
2933  * @kcontrol: mixer control
2934  * @uinfo: control element information
2935  *
2936  * Callback to provide information about a signed mixer control.
2937  *
2938  * Returns 0 for success.
2939  */
2940 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2941         struct snd_ctl_elem_info *uinfo)
2942 {
2943         struct soc_mixer_control *mc =
2944                 (struct soc_mixer_control *)kcontrol->private_value;
2945         int platform_max;
2946         int min = mc->min;
2947
2948         if (!mc->platform_max)
2949                 mc->platform_max = mc->max;
2950         platform_max = mc->platform_max;
2951
2952         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2953         uinfo->count = 2;
2954         uinfo->value.integer.min = 0;
2955         uinfo->value.integer.max = platform_max - min;
2956         return 0;
2957 }
2958 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2959
2960 /**
2961  * snd_soc_get_volsw_s8 - signed mixer get callback
2962  * @kcontrol: mixer control
2963  * @ucontrol: control element information
2964  *
2965  * Callback to get the value of a signed mixer control.
2966  *
2967  * Returns 0 for success.
2968  */
2969 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2970         struct snd_ctl_elem_value *ucontrol)
2971 {
2972         struct soc_mixer_control *mc =
2973                 (struct soc_mixer_control *)kcontrol->private_value;
2974         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2975         unsigned int reg = mc->reg;
2976         int min = mc->min;
2977         int val = snd_soc_read(codec, reg);
2978
2979         ucontrol->value.integer.value[0] =
2980                 ((signed char)(val & 0xff))-min;
2981         ucontrol->value.integer.value[1] =
2982                 ((signed char)((val >> 8) & 0xff))-min;
2983         return 0;
2984 }
2985 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2986
2987 /**
2988  * snd_soc_put_volsw_sgn - signed mixer put callback
2989  * @kcontrol: mixer control
2990  * @ucontrol: control element information
2991  *
2992  * Callback to set the value of a signed mixer control.
2993  *
2994  * Returns 0 for success.
2995  */
2996 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2997         struct snd_ctl_elem_value *ucontrol)
2998 {
2999         struct soc_mixer_control *mc =
3000                 (struct soc_mixer_control *)kcontrol->private_value;
3001         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3002         unsigned int reg = mc->reg;
3003         int min = mc->min;
3004         unsigned int val;
3005
3006         val = (ucontrol->value.integer.value[0]+min) & 0xff;
3007         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3008
3009         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3010 }
3011 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3012
3013 /**
3014  * snd_soc_limit_volume - Set new limit to an existing volume control.
3015  *
3016  * @codec: where to look for the control
3017  * @name: Name of the control
3018  * @max: new maximum limit
3019  *
3020  * Return 0 for success, else error.
3021  */
3022 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3023         const char *name, int max)
3024 {
3025         struct snd_card *card = codec->card->snd_card;
3026         struct snd_kcontrol *kctl;
3027         struct soc_mixer_control *mc;
3028         int found = 0;
3029         int ret = -EINVAL;
3030
3031         /* Sanity check for name and max */
3032         if (unlikely(!name || max <= 0))
3033                 return -EINVAL;
3034
3035         list_for_each_entry(kctl, &card->controls, list) {
3036                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3037                         found = 1;
3038                         break;
3039                 }
3040         }
3041         if (found) {
3042                 mc = (struct soc_mixer_control *)kctl->private_value;
3043                 if (max <= mc->max) {
3044                         mc->platform_max = max;
3045                         ret = 0;
3046                 }
3047         }
3048         return ret;
3049 }
3050 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3051
3052 /**
3053  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
3054  *  mixer info callback
3055  * @kcontrol: mixer control
3056  * @uinfo: control element information
3057  *
3058  * Returns 0 for success.
3059  */
3060 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3061                         struct snd_ctl_elem_info *uinfo)
3062 {
3063         struct soc_mixer_control *mc =
3064                 (struct soc_mixer_control *)kcontrol->private_value;
3065         int max = mc->max;
3066         int min = mc->min;
3067
3068         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3069         uinfo->count = 2;
3070         uinfo->value.integer.min = 0;
3071         uinfo->value.integer.max = max-min;
3072
3073         return 0;
3074 }
3075 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3076
3077 /**
3078  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3079  *  mixer get callback
3080  * @kcontrol: mixer control
3081  * @uinfo: control element information
3082  *
3083  * Returns 0 for success.
3084  */
3085 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3086                         struct snd_ctl_elem_value *ucontrol)
3087 {
3088         struct soc_mixer_control *mc =
3089                 (struct soc_mixer_control *)kcontrol->private_value;
3090         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3091         unsigned int mask = (1<<mc->shift)-1;
3092         int min = mc->min;
3093         int val = snd_soc_read(codec, mc->reg) & mask;
3094         int valr = snd_soc_read(codec, mc->rreg) & mask;
3095
3096         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3097         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3098         return 0;
3099 }
3100 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3101
3102 /**
3103  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3104  *  mixer put callback
3105  * @kcontrol: mixer control
3106  * @uinfo: control element information
3107  *
3108  * Returns 0 for success.
3109  */
3110 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3111                         struct snd_ctl_elem_value *ucontrol)
3112 {
3113         struct soc_mixer_control *mc =
3114                 (struct soc_mixer_control *)kcontrol->private_value;
3115         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3116         unsigned int mask = (1<<mc->shift)-1;
3117         int min = mc->min;
3118         int ret;
3119         unsigned int val, valr, oval, ovalr;
3120
3121         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3122         val &= mask;
3123         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3124         valr &= mask;
3125
3126         oval = snd_soc_read(codec, mc->reg) & mask;
3127         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3128
3129         ret = 0;
3130         if (oval != val) {
3131                 ret = snd_soc_write(codec, mc->reg, val);
3132                 if (ret < 0)
3133                         return ret;
3134         }
3135         if (ovalr != valr) {
3136                 ret = snd_soc_write(codec, mc->rreg, valr);
3137                 if (ret < 0)
3138                         return ret;
3139         }
3140
3141         return 0;
3142 }
3143 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3144
3145 /**
3146  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3147  * @dai: DAI
3148  * @clk_id: DAI specific clock ID
3149  * @freq: new clock frequency in Hz
3150  * @dir: new clock direction - input/output.
3151  *
3152  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3153  */
3154 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3155         unsigned int freq, int dir)
3156 {
3157         if (dai->driver && dai->driver->ops->set_sysclk)
3158                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3159         else if (dai->codec && dai->codec->driver->set_sysclk)
3160                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3161                                                       freq, dir);
3162         else
3163                 return -EINVAL;
3164 }
3165 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3166
3167 /**
3168  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3169  * @codec: CODEC
3170  * @clk_id: DAI specific clock ID
3171  * @freq: new clock frequency in Hz
3172  * @dir: new clock direction - input/output.
3173  *
3174  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3175  */
3176 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3177         unsigned int freq, int dir)
3178 {
3179         if (codec->driver->set_sysclk)
3180                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3181         else
3182                 return -EINVAL;
3183 }
3184 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3185
3186 /**
3187  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3188  * @dai: DAI
3189  * @div_id: DAI specific clock divider ID
3190  * @div: new clock divisor.
3191  *
3192  * Configures the clock dividers. This is used to derive the best DAI bit and
3193  * frame clocks from the system or master clock. It's best to set the DAI bit
3194  * and frame clocks as low as possible to save system power.
3195  */
3196 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3197         int div_id, int div)
3198 {
3199         if (dai->driver && dai->driver->ops->set_clkdiv)
3200                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3201         else
3202                 return -EINVAL;
3203 }
3204 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3205
3206 /**
3207  * snd_soc_dai_set_pll - configure DAI PLL.
3208  * @dai: DAI
3209  * @pll_id: DAI specific PLL ID
3210  * @source: DAI specific source for the PLL
3211  * @freq_in: PLL input clock frequency in Hz
3212  * @freq_out: requested PLL output clock frequency in Hz
3213  *
3214  * Configures and enables PLL to generate output clock based on input clock.
3215  */
3216 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3217         unsigned int freq_in, unsigned int freq_out)
3218 {
3219         if (dai->driver && dai->driver->ops->set_pll)
3220                 return dai->driver->ops->set_pll(dai, pll_id, source,
3221                                          freq_in, freq_out);
3222         else if (dai->codec && dai->codec->driver->set_pll)
3223                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3224                                                    freq_in, freq_out);
3225         else
3226                 return -EINVAL;
3227 }
3228 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3229
3230 /*
3231  * snd_soc_codec_set_pll - configure codec PLL.
3232  * @codec: CODEC
3233  * @pll_id: DAI specific PLL ID
3234  * @source: DAI specific source for the PLL
3235  * @freq_in: PLL input clock frequency in Hz
3236  * @freq_out: requested PLL output clock frequency in Hz
3237  *
3238  * Configures and enables PLL to generate output clock based on input clock.
3239  */
3240 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3241                           unsigned int freq_in, unsigned int freq_out)
3242 {
3243         if (codec->driver->set_pll)
3244                 return codec->driver->set_pll(codec, pll_id, source,
3245                                               freq_in, freq_out);
3246         else
3247                 return -EINVAL;
3248 }
3249 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3250
3251 /**
3252  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3253  * @dai: DAI
3254  * @fmt: SND_SOC_DAIFMT_ format value.
3255  *
3256  * Configures the DAI hardware format and clocking.
3257  */
3258 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3259 {
3260         if (dai->driver && dai->driver->ops->set_fmt)
3261                 return dai->driver->ops->set_fmt(dai, fmt);
3262         else
3263                 return -EINVAL;
3264 }
3265 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3266
3267 /**
3268  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3269  * @dai: DAI
3270  * @tx_mask: bitmask representing active TX slots.
3271  * @rx_mask: bitmask representing active RX slots.
3272  * @slots: Number of slots in use.
3273  * @slot_width: Width in bits for each slot.
3274  *
3275  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3276  * specific.
3277  */
3278 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3279         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3280 {
3281         if (dai->driver && dai->driver->ops->set_tdm_slot)
3282                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3283                                 slots, slot_width);
3284         else
3285                 return -EINVAL;
3286 }
3287 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3288
3289 /**
3290  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3291  * @dai: DAI
3292  * @tx_num: how many TX channels
3293  * @tx_slot: pointer to an array which imply the TX slot number channel
3294  *           0~num-1 uses
3295  * @rx_num: how many RX channels
3296  * @rx_slot: pointer to an array which imply the RX slot number channel
3297  *           0~num-1 uses
3298  *
3299  * configure the relationship between channel number and TDM slot number.
3300  */
3301 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3302         unsigned int tx_num, unsigned int *tx_slot,
3303         unsigned int rx_num, unsigned int *rx_slot)
3304 {
3305         if (dai->driver && dai->driver->ops->set_channel_map)
3306                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3307                         rx_num, rx_slot);
3308         else
3309                 return -EINVAL;
3310 }
3311 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3312
3313 /**
3314  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3315  * @dai: DAI
3316  * @tristate: tristate enable
3317  *
3318  * Tristates the DAI so that others can use it.
3319  */
3320 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3321 {
3322         if (dai->driver && dai->driver->ops->set_tristate)
3323                 return dai->driver->ops->set_tristate(dai, tristate);
3324         else
3325                 return -EINVAL;
3326 }
3327 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3328
3329 /**
3330  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3331  * @dai: DAI
3332  * @mute: mute enable
3333  *
3334  * Mutes the DAI DAC.
3335  */
3336 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3337 {
3338         if (dai->driver && dai->driver->ops->digital_mute)
3339                 return dai->driver->ops->digital_mute(dai, mute);
3340         else
3341                 return -EINVAL;
3342 }
3343 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3344
3345 /**
3346  * snd_soc_register_card - Register a card with the ASoC core
3347  *
3348  * @card: Card to register
3349  *
3350  */
3351 int snd_soc_register_card(struct snd_soc_card *card)
3352 {
3353         int i;
3354
3355         if (!card->name || !card->dev)
3356                 return -EINVAL;
3357
3358         snd_soc_initialize_card_lists(card);
3359
3360         soc_init_card_debugfs(card);
3361
3362         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3363                             (card->num_links + card->num_aux_devs),
3364                             GFP_KERNEL);
3365         if (card->rtd == NULL)
3366                 return -ENOMEM;
3367         card->rtd_aux = &card->rtd[card->num_links];
3368
3369         for (i = 0; i < card->num_links; i++)
3370                 card->rtd[i].dai_link = &card->dai_link[i];
3371
3372         INIT_LIST_HEAD(&card->list);
3373         card->instantiated = 0;
3374         mutex_init(&card->mutex);
3375
3376         mutex_lock(&client_mutex);
3377         list_add(&card->list, &card_list);
3378         snd_soc_instantiate_cards();
3379         mutex_unlock(&client_mutex);
3380
3381         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3382
3383         return 0;
3384 }
3385 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3386
3387 /**
3388  * snd_soc_unregister_card - Unregister a card with the ASoC core
3389  *
3390  * @card: Card to unregister
3391  *
3392  */
3393 int snd_soc_unregister_card(struct snd_soc_card *card)
3394 {
3395         if (card->instantiated)
3396                 soc_cleanup_card_resources(card);
3397         mutex_lock(&client_mutex);
3398         list_del(&card->list);
3399         mutex_unlock(&client_mutex);
3400         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3401
3402         return 0;
3403 }
3404 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3405
3406 /*
3407  * Simplify DAI link configuration by removing ".-1" from device names
3408  * and sanitizing names.
3409  */
3410 static char *fmt_single_name(struct device *dev, int *id)
3411 {
3412         char *found, name[NAME_SIZE];
3413         int id1, id2;
3414
3415         if (dev_name(dev) == NULL)
3416                 return NULL;
3417
3418         strlcpy(name, dev_name(dev), NAME_SIZE);
3419
3420         /* are we a "%s.%d" name (platform and SPI components) */
3421         found = strstr(name, dev->driver->name);
3422         if (found) {
3423                 /* get ID */
3424                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3425
3426                         /* discard ID from name if ID == -1 */
3427                         if (*id == -1)
3428                                 found[strlen(dev->driver->name)] = '\0';
3429                 }
3430
3431         } else {
3432                 /* I2C component devices are named "bus-addr"  */
3433                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3434                         char tmp[NAME_SIZE];
3435
3436                         /* create unique ID number from I2C addr and bus */
3437                         *id = ((id1 & 0xffff) << 16) + id2;
3438
3439                         /* sanitize component name for DAI link creation */
3440                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3441                         strlcpy(name, tmp, NAME_SIZE);
3442                 } else
3443                         *id = 0;
3444         }
3445
3446         return kstrdup(name, GFP_KERNEL);
3447 }
3448
3449 /*
3450  * Simplify DAI link naming for single devices with multiple DAIs by removing
3451  * any ".-1" and using the DAI name (instead of device name).
3452  */
3453 static inline char *fmt_multiple_name(struct device *dev,
3454                 struct snd_soc_dai_driver *dai_drv)
3455 {
3456         if (dai_drv->name == NULL) {
3457                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3458                                 dev_name(dev));
3459                 return NULL;
3460         }
3461
3462         return kstrdup(dai_drv->name, GFP_KERNEL);
3463 }
3464
3465 /**
3466  * snd_soc_register_dai - Register a DAI with the ASoC core
3467  *
3468  * @dai: DAI to register
3469  */
3470 int snd_soc_register_dai(struct device *dev,
3471                 struct snd_soc_dai_driver *dai_drv)
3472 {
3473         struct snd_soc_dai *dai;
3474
3475         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3476
3477         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3478         if (dai == NULL)
3479                 return -ENOMEM;
3480
3481         /* create DAI component name */
3482         dai->name = fmt_single_name(dev, &dai->id);
3483         if (dai->name == NULL) {
3484                 kfree(dai);
3485                 return -ENOMEM;
3486         }
3487
3488         dai->dev = dev;
3489         dai->driver = dai_drv;
3490         if (!dai->driver->ops)
3491                 dai->driver->ops = &null_dai_ops;
3492
3493         mutex_lock(&client_mutex);
3494         list_add(&dai->list, &dai_list);
3495         snd_soc_instantiate_cards();
3496         mutex_unlock(&client_mutex);
3497
3498         pr_debug("Registered DAI '%s'\n", dai->name);
3499
3500         return 0;
3501 }
3502 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3503
3504 /**
3505  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3506  *
3507  * @dai: DAI to unregister
3508  */
3509 void snd_soc_unregister_dai(struct device *dev)
3510 {
3511         struct snd_soc_dai *dai;
3512
3513         list_for_each_entry(dai, &dai_list, list) {
3514                 if (dev == dai->dev)
3515                         goto found;
3516         }
3517         return;
3518
3519 found:
3520         mutex_lock(&client_mutex);
3521         list_del(&dai->list);
3522         mutex_unlock(&client_mutex);
3523
3524         pr_debug("Unregistered DAI '%s'\n", dai->name);
3525         kfree(dai->name);
3526         kfree(dai);
3527 }
3528 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3529
3530 /**
3531  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3532  *
3533  * @dai: Array of DAIs to register
3534  * @count: Number of DAIs
3535  */
3536 int snd_soc_register_dais(struct device *dev,
3537                 struct snd_soc_dai_driver *dai_drv, size_t count)
3538 {
3539         struct snd_soc_dai *dai;
3540         int i, ret = 0;
3541
3542         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3543
3544         for (i = 0; i < count; i++) {
3545
3546                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3547                 if (dai == NULL) {
3548                         ret = -ENOMEM;
3549                         goto err;
3550                 }
3551
3552                 /* create DAI component name */
3553                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3554                 if (dai->name == NULL) {
3555                         kfree(dai);
3556                         ret = -EINVAL;
3557                         goto err;
3558                 }
3559
3560                 dai->dev = dev;
3561                 dai->driver = &dai_drv[i];
3562                 if (dai->driver->id)
3563                         dai->id = dai->driver->id;
3564                 else
3565                         dai->id = i;
3566                 if (!dai->driver->ops)
3567                         dai->driver->ops = &null_dai_ops;
3568
3569                 mutex_lock(&client_mutex);
3570                 list_add(&dai->list, &dai_list);
3571                 mutex_unlock(&client_mutex);
3572
3573                 pr_debug("Registered DAI '%s'\n", dai->name);
3574         }
3575
3576         mutex_lock(&client_mutex);
3577         snd_soc_instantiate_cards();
3578         mutex_unlock(&client_mutex);
3579         return 0;
3580
3581 err:
3582         for (i--; i >= 0; i--)
3583                 snd_soc_unregister_dai(dev);
3584
3585         return ret;
3586 }
3587 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3588
3589 /**
3590  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3591  *
3592  * @dai: Array of DAIs to unregister
3593  * @count: Number of DAIs
3594  */
3595 void snd_soc_unregister_dais(struct device *dev, size_t count)
3596 {
3597         int i;
3598
3599         for (i = 0; i < count; i++)
3600                 snd_soc_unregister_dai(dev);
3601 }
3602 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3603
3604 /**
3605  * snd_soc_register_platform - Register a platform with the ASoC core
3606  *
3607  * @platform: platform to register
3608  */
3609 int snd_soc_register_platform(struct device *dev,
3610                 struct snd_soc_platform_driver *platform_drv)
3611 {
3612         struct snd_soc_platform *platform;
3613
3614         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3615
3616         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3617         if (platform == NULL)
3618                 return -ENOMEM;
3619
3620         /* create platform component name */
3621         platform->name = fmt_single_name(dev, &platform->id);
3622         if (platform->name == NULL) {
3623                 kfree(platform);
3624                 return -ENOMEM;
3625         }
3626
3627         platform->dev = dev;
3628         platform->driver = platform_drv;
3629
3630         mutex_lock(&client_mutex);
3631         list_add(&platform->list, &platform_list);
3632         snd_soc_instantiate_cards();
3633         mutex_unlock(&client_mutex);
3634
3635         pr_debug("Registered platform '%s'\n", platform->name);
3636
3637         return 0;
3638 }
3639 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3640
3641 /**
3642  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3643  *
3644  * @platform: platform to unregister
3645  */
3646 void snd_soc_unregister_platform(struct device *dev)
3647 {
3648         struct snd_soc_platform *platform;
3649
3650         list_for_each_entry(platform, &platform_list, list) {
3651                 if (dev == platform->dev)
3652                         goto found;
3653         }
3654         return;
3655
3656 found:
3657         mutex_lock(&client_mutex);
3658         list_del(&platform->list);
3659         mutex_unlock(&client_mutex);
3660
3661         pr_debug("Unregistered platform '%s'\n", platform->name);
3662         kfree(platform->name);
3663         kfree(platform);
3664 }
3665 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3666
3667 static u64 codec_format_map[] = {
3668         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3669         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3670         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3671         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3672         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3673         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3674         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3675         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3676         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3677         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3678         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3679         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3680         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3681         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3682         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3683         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3684 };
3685
3686 /* Fix up the DAI formats for endianness: codecs don't actually see
3687  * the endianness of the data but we're using the CPU format
3688  * definitions which do need to include endianness so we ensure that
3689  * codec DAIs always have both big and little endian variants set.
3690  */
3691 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3692 {
3693         int i;
3694
3695         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3696                 if (stream->formats & codec_format_map[i])
3697                         stream->formats |= codec_format_map[i];
3698 }
3699
3700 /**
3701  * snd_soc_register_codec - Register a codec with the ASoC core
3702  *
3703  * @codec: codec to register
3704  */
3705 int snd_soc_register_codec(struct device *dev,
3706                            const struct snd_soc_codec_driver *codec_drv,
3707                            struct snd_soc_dai_driver *dai_drv,
3708                            int num_dai)
3709 {
3710         size_t reg_size;
3711         struct snd_soc_codec *codec;
3712         int ret, i;
3713
3714         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3715
3716         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3717         if (codec == NULL)
3718                 return -ENOMEM;
3719
3720         /* create CODEC component name */
3721         codec->name = fmt_single_name(dev, &codec->id);
3722         if (codec->name == NULL) {
3723                 kfree(codec);
3724                 return -ENOMEM;
3725         }
3726
3727         if (codec_drv->compress_type)
3728                 codec->compress_type = codec_drv->compress_type;
3729         else
3730                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3731
3732         codec->write = codec_drv->write;
3733         codec->read = codec_drv->read;
3734         codec->volatile_register = codec_drv->volatile_register;
3735         codec->readable_register = codec_drv->readable_register;
3736         codec->writable_register = codec_drv->writable_register;
3737         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3738         codec->dapm.dev = dev;
3739         codec->dapm.codec = codec;
3740         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3741         codec->dev = dev;
3742         codec->driver = codec_drv;
3743         codec->num_dai = num_dai;
3744         mutex_init(&codec->mutex);
3745
3746         /* allocate CODEC register cache */
3747         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3748                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3749                 codec->reg_size = reg_size;
3750                 /* it is necessary to make a copy of the default register cache
3751                  * because in the case of using a compression type that requires
3752                  * the default register cache to be marked as __devinitconst the
3753                  * kernel might have freed the array by the time we initialize
3754                  * the cache.
3755                  */
3756                 if (codec_drv->reg_cache_default) {
3757                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3758                                                       reg_size, GFP_KERNEL);
3759                         if (!codec->reg_def_copy) {
3760                                 ret = -ENOMEM;
3761                                 goto fail;
3762                         }
3763                 }
3764         }
3765
3766         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3767                 if (!codec->volatile_register)
3768                         codec->volatile_register = snd_soc_default_volatile_register;
3769                 if (!codec->readable_register)
3770                         codec->readable_register = snd_soc_default_readable_register;
3771                 if (!codec->writable_register)
3772                         codec->writable_register = snd_soc_default_writable_register;
3773         }
3774
3775         for (i = 0; i < num_dai; i++) {
3776                 fixup_codec_formats(&dai_drv[i].playback);
3777                 fixup_codec_formats(&dai_drv[i].capture);
3778         }
3779
3780         /* register any DAIs */
3781         if (num_dai) {
3782                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3783                 if (ret < 0)
3784                         goto fail;
3785         }
3786
3787         mutex_lock(&client_mutex);
3788         list_add(&codec->list, &codec_list);
3789         snd_soc_instantiate_cards();
3790         mutex_unlock(&client_mutex);
3791
3792         pr_debug("Registered codec '%s'\n", codec->name);
3793         return 0;
3794
3795 fail:
3796         kfree(codec->reg_def_copy);
3797         codec->reg_def_copy = NULL;
3798         kfree(codec->name);
3799         kfree(codec);
3800         return ret;
3801 }
3802 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3803
3804 /**
3805  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3806  *
3807  * @codec: codec to unregister
3808  */
3809 void snd_soc_unregister_codec(struct device *dev)
3810 {
3811         struct snd_soc_codec *codec;
3812         int i;
3813
3814         list_for_each_entry(codec, &codec_list, list) {
3815                 if (dev == codec->dev)
3816                         goto found;
3817         }
3818         return;
3819
3820 found:
3821         if (codec->num_dai)
3822                 for (i = 0; i < codec->num_dai; i++)
3823                         snd_soc_unregister_dai(dev);
3824
3825         mutex_lock(&client_mutex);
3826         list_del(&codec->list);
3827         mutex_unlock(&client_mutex);
3828
3829         pr_debug("Unregistered codec '%s'\n", codec->name);
3830
3831         snd_soc_cache_exit(codec);
3832         kfree(codec->reg_def_copy);
3833         kfree(codec->name);
3834         kfree(codec);
3835 }
3836 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3837
3838 static int __init snd_soc_init(void)
3839 {
3840 #ifdef CONFIG_DEBUG_FS
3841         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3842         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3843                 printk(KERN_WARNING
3844                        "ASoC: Failed to create debugfs directory\n");
3845                 snd_soc_debugfs_root = NULL;
3846         }
3847
3848         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3849                                  &codec_list_fops))
3850                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3851
3852         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3853                                  &dai_list_fops))
3854                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3855
3856         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3857                                  &platform_list_fops))
3858                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3859 #endif
3860
3861         snd_soc_util_init();
3862
3863         return platform_driver_register(&soc_driver);
3864 }
3865 module_init(snd_soc_init);
3866
3867 static void __exit snd_soc_exit(void)
3868 {
3869         snd_soc_util_exit();
3870
3871 #ifdef CONFIG_DEBUG_FS
3872         debugfs_remove_recursive(snd_soc_debugfs_root);
3873 #endif
3874         platform_driver_unregister(&soc_driver);
3875 }
3876 module_exit(snd_soc_exit);
3877
3878 /* Module information */
3879 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3880 MODULE_DESCRIPTION("ALSA SoC Core");
3881 MODULE_LICENSE("GPL");
3882 MODULE_ALIAS("platform:soc-audio");