9dc13113fa26c1bc91d8dcd03218e8048d10f2ee
[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         codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
306                                                  codec->debugfs_codec_root);
307         if (!codec->dapm.debugfs_dapm)
308                 printk(KERN_WARNING
309                        "Failed to create DAPM debugfs directory\n");
310
311         snd_soc_dapm_debugfs_init(&codec->dapm);
312 }
313
314 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
315 {
316         debugfs_remove_recursive(codec->debugfs_codec_root);
317 }
318
319 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
320                                     size_t count, loff_t *ppos)
321 {
322         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
323         ssize_t len, ret = 0;
324         struct snd_soc_codec *codec;
325
326         if (!buf)
327                 return -ENOMEM;
328
329         list_for_each_entry(codec, &codec_list, list) {
330                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
331                                codec->name);
332                 if (len >= 0)
333                         ret += len;
334                 if (ret > PAGE_SIZE) {
335                         ret = PAGE_SIZE;
336                         break;
337                 }
338         }
339
340         if (ret >= 0)
341                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
342
343         kfree(buf);
344
345         return ret;
346 }
347
348 static const struct file_operations codec_list_fops = {
349         .read = codec_list_read_file,
350         .llseek = default_llseek,/* read accesses f_pos */
351 };
352
353 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
354                                   size_t count, loff_t *ppos)
355 {
356         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
357         ssize_t len, ret = 0;
358         struct snd_soc_dai *dai;
359
360         if (!buf)
361                 return -ENOMEM;
362
363         list_for_each_entry(dai, &dai_list, list) {
364                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
365                 if (len >= 0)
366                         ret += len;
367                 if (ret > PAGE_SIZE) {
368                         ret = PAGE_SIZE;
369                         break;
370                 }
371         }
372
373         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
374
375         kfree(buf);
376
377         return ret;
378 }
379
380 static const struct file_operations dai_list_fops = {
381         .read = dai_list_read_file,
382         .llseek = default_llseek,/* read accesses f_pos */
383 };
384
385 static ssize_t platform_list_read_file(struct file *file,
386                                        char __user *user_buf,
387                                        size_t count, loff_t *ppos)
388 {
389         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
390         ssize_t len, ret = 0;
391         struct snd_soc_platform *platform;
392
393         if (!buf)
394                 return -ENOMEM;
395
396         list_for_each_entry(platform, &platform_list, list) {
397                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
398                                platform->name);
399                 if (len >= 0)
400                         ret += len;
401                 if (ret > PAGE_SIZE) {
402                         ret = PAGE_SIZE;
403                         break;
404                 }
405         }
406
407         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
408
409         kfree(buf);
410
411         return ret;
412 }
413
414 static const struct file_operations platform_list_fops = {
415         .read = platform_list_read_file,
416         .llseek = default_llseek,/* read accesses f_pos */
417 };
418
419 static void soc_init_card_debugfs(struct snd_soc_card *card)
420 {
421         card->debugfs_card_root = debugfs_create_dir(card->name,
422                                                      snd_soc_debugfs_root);
423         if (!card->debugfs_card_root) {
424                 dev_warn(card->dev,
425                          "ASoC: Failed to create codec debugfs directory\n");
426                 return;
427         }
428
429         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
430                                                     card->debugfs_card_root,
431                                                     &card->pop_time);
432         if (!card->debugfs_pop_time)
433                 dev_warn(card->dev,
434                        "Failed to create pop time debugfs file\n");
435 }
436
437 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
438 {
439         debugfs_remove_recursive(card->debugfs_card_root);
440 }
441
442 #else
443
444 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
445 {
446 }
447
448 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
449 {
450 }
451
452 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
453 {
454 }
455
456 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
457 {
458 }
459 #endif
460
461 #ifdef CONFIG_SND_SOC_AC97_BUS
462 /* unregister ac97 codec */
463 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
464 {
465         if (codec->ac97->dev.bus)
466                 device_unregister(&codec->ac97->dev);
467         return 0;
468 }
469
470 /* stop no dev release warning */
471 static void soc_ac97_device_release(struct device *dev){}
472
473 /* register ac97 codec to bus */
474 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
475 {
476         int err;
477
478         codec->ac97->dev.bus = &ac97_bus_type;
479         codec->ac97->dev.parent = codec->card->dev;
480         codec->ac97->dev.release = soc_ac97_device_release;
481
482         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
483                      codec->card->snd_card->number, 0, codec->name);
484         err = device_register(&codec->ac97->dev);
485         if (err < 0) {
486                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
487                 codec->ac97->dev.bus = NULL;
488                 return err;
489         }
490         return 0;
491 }
492 #endif
493
494 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
495 {
496         struct snd_soc_pcm_runtime *rtd = substream->private_data;
497         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
498         struct snd_soc_dai *codec_dai = rtd->codec_dai;
499         int ret;
500
501         if (!codec_dai->driver->symmetric_rates &&
502             !cpu_dai->driver->symmetric_rates &&
503             !rtd->dai_link->symmetric_rates)
504                 return 0;
505
506         /* This can happen if multiple streams are starting simultaneously -
507          * the second can need to get its constraints before the first has
508          * picked a rate.  Complain and allow the application to carry on.
509          */
510         if (!rtd->rate) {
511                 dev_warn(&rtd->dev,
512                          "Not enforcing symmetric_rates due to race\n");
513                 return 0;
514         }
515
516         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
517
518         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
519                                            SNDRV_PCM_HW_PARAM_RATE,
520                                            rtd->rate, rtd->rate);
521         if (ret < 0) {
522                 dev_err(&rtd->dev,
523                         "Unable to apply rate symmetry constraint: %d\n", ret);
524                 return ret;
525         }
526
527         return 0;
528 }
529
530 /*
531  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
532  * then initialized and any private data can be allocated. This also calls
533  * startup for the cpu DAI, platform, machine and codec DAI.
534  */
535 static int soc_pcm_open(struct snd_pcm_substream *substream)
536 {
537         struct snd_soc_pcm_runtime *rtd = substream->private_data;
538         struct snd_pcm_runtime *runtime = substream->runtime;
539         struct snd_soc_platform *platform = rtd->platform;
540         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
541         struct snd_soc_dai *codec_dai = rtd->codec_dai;
542         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
543         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
544         int ret = 0;
545
546         mutex_lock(&pcm_mutex);
547
548         /* startup the audio subsystem */
549         if (cpu_dai->driver->ops->startup) {
550                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
551                 if (ret < 0) {
552                         printk(KERN_ERR "asoc: can't open interface %s\n",
553                                 cpu_dai->name);
554                         goto out;
555                 }
556         }
557
558         if (platform->driver->ops && platform->driver->ops->open) {
559                 ret = platform->driver->ops->open(substream);
560                 if (ret < 0) {
561                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
562                         goto platform_err;
563                 }
564         }
565
566         if (codec_dai->driver->ops->startup) {
567                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
568                 if (ret < 0) {
569                         printk(KERN_ERR "asoc: can't open codec %s\n",
570                                 codec_dai->name);
571                         goto codec_dai_err;
572                 }
573         }
574
575         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
576                 ret = rtd->dai_link->ops->startup(substream);
577                 if (ret < 0) {
578                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
579                         goto machine_err;
580                 }
581         }
582
583         /* Check that the codec and cpu DAIs are compatible */
584         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
585                 runtime->hw.rate_min =
586                         max(codec_dai_drv->playback.rate_min,
587                             cpu_dai_drv->playback.rate_min);
588                 runtime->hw.rate_max =
589                         min(codec_dai_drv->playback.rate_max,
590                             cpu_dai_drv->playback.rate_max);
591                 runtime->hw.channels_min =
592                         max(codec_dai_drv->playback.channels_min,
593                                 cpu_dai_drv->playback.channels_min);
594                 runtime->hw.channels_max =
595                         min(codec_dai_drv->playback.channels_max,
596                                 cpu_dai_drv->playback.channels_max);
597                 runtime->hw.formats =
598                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
599                 runtime->hw.rates =
600                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
601                 if (codec_dai_drv->playback.rates
602                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
603                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
604                 if (cpu_dai_drv->playback.rates
605                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
606                         runtime->hw.rates |= codec_dai_drv->playback.rates;
607         } else {
608                 runtime->hw.rate_min =
609                         max(codec_dai_drv->capture.rate_min,
610                             cpu_dai_drv->capture.rate_min);
611                 runtime->hw.rate_max =
612                         min(codec_dai_drv->capture.rate_max,
613                             cpu_dai_drv->capture.rate_max);
614                 runtime->hw.channels_min =
615                         max(codec_dai_drv->capture.channels_min,
616                                 cpu_dai_drv->capture.channels_min);
617                 runtime->hw.channels_max =
618                         min(codec_dai_drv->capture.channels_max,
619                                 cpu_dai_drv->capture.channels_max);
620                 runtime->hw.formats =
621                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
622                 runtime->hw.rates =
623                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
624                 if (codec_dai_drv->capture.rates
625                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
626                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
627                 if (cpu_dai_drv->capture.rates
628                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
629                         runtime->hw.rates |= codec_dai_drv->capture.rates;
630         }
631
632         ret = -EINVAL;
633         snd_pcm_limit_hw_rates(runtime);
634         if (!runtime->hw.rates) {
635                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
636                         codec_dai->name, cpu_dai->name);
637                 goto config_err;
638         }
639         if (!runtime->hw.formats) {
640                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
641                         codec_dai->name, cpu_dai->name);
642                 goto config_err;
643         }
644         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
645             runtime->hw.channels_min > runtime->hw.channels_max) {
646                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
647                                 codec_dai->name, cpu_dai->name);
648                 goto config_err;
649         }
650
651         /* Symmetry only applies if we've already got an active stream. */
652         if (cpu_dai->active || codec_dai->active) {
653                 ret = soc_pcm_apply_symmetry(substream);
654                 if (ret != 0)
655                         goto config_err;
656         }
657
658         pr_debug("asoc: %s <-> %s info:\n",
659                         codec_dai->name, cpu_dai->name);
660         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
661         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
662                  runtime->hw.channels_max);
663         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
664                  runtime->hw.rate_max);
665
666         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
667                 cpu_dai->playback_active++;
668                 codec_dai->playback_active++;
669         } else {
670                 cpu_dai->capture_active++;
671                 codec_dai->capture_active++;
672         }
673         cpu_dai->active++;
674         codec_dai->active++;
675         rtd->codec->active++;
676         mutex_unlock(&pcm_mutex);
677         return 0;
678
679 config_err:
680         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
681                 rtd->dai_link->ops->shutdown(substream);
682
683 machine_err:
684         if (codec_dai->driver->ops->shutdown)
685                 codec_dai->driver->ops->shutdown(substream, codec_dai);
686
687 codec_dai_err:
688         if (platform->driver->ops && platform->driver->ops->close)
689                 platform->driver->ops->close(substream);
690
691 platform_err:
692         if (cpu_dai->driver->ops->shutdown)
693                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
694 out:
695         mutex_unlock(&pcm_mutex);
696         return ret;
697 }
698
699 /*
700  * Power down the audio subsystem pmdown_time msecs after close is called.
701  * This is to ensure there are no pops or clicks in between any music tracks
702  * due to DAPM power cycling.
703  */
704 static void close_delayed_work(struct work_struct *work)
705 {
706         struct snd_soc_pcm_runtime *rtd =
707                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
708         struct snd_soc_dai *codec_dai = rtd->codec_dai;
709
710         mutex_lock(&pcm_mutex);
711
712         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
713                  codec_dai->driver->playback.stream_name,
714                  codec_dai->playback_active ? "active" : "inactive",
715                  codec_dai->pop_wait ? "yes" : "no");
716
717         /* are we waiting on this codec DAI stream */
718         if (codec_dai->pop_wait == 1) {
719                 codec_dai->pop_wait = 0;
720                 snd_soc_dapm_stream_event(rtd,
721                         codec_dai->driver->playback.stream_name,
722                         SND_SOC_DAPM_STREAM_STOP);
723         }
724
725         mutex_unlock(&pcm_mutex);
726 }
727
728 /*
729  * Called by ALSA when a PCM substream is closed. Private data can be
730  * freed here. The cpu DAI, codec DAI, machine and platform are also
731  * shutdown.
732  */
733 static int soc_codec_close(struct snd_pcm_substream *substream)
734 {
735         struct snd_soc_pcm_runtime *rtd = substream->private_data;
736         struct snd_soc_platform *platform = rtd->platform;
737         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
738         struct snd_soc_dai *codec_dai = rtd->codec_dai;
739         struct snd_soc_codec *codec = rtd->codec;
740
741         mutex_lock(&pcm_mutex);
742
743         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
744                 cpu_dai->playback_active--;
745                 codec_dai->playback_active--;
746         } else {
747                 cpu_dai->capture_active--;
748                 codec_dai->capture_active--;
749         }
750
751         cpu_dai->active--;
752         codec_dai->active--;
753         codec->active--;
754
755         /* Muting the DAC suppresses artifacts caused during digital
756          * shutdown, for example from stopping clocks.
757          */
758         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
759                 snd_soc_dai_digital_mute(codec_dai, 1);
760
761         if (cpu_dai->driver->ops->shutdown)
762                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
763
764         if (codec_dai->driver->ops->shutdown)
765                 codec_dai->driver->ops->shutdown(substream, codec_dai);
766
767         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
768                 rtd->dai_link->ops->shutdown(substream);
769
770         if (platform->driver->ops && platform->driver->ops->close)
771                 platform->driver->ops->close(substream);
772         cpu_dai->runtime = NULL;
773
774         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
775                 /* start delayed pop wq here for playback streams */
776                 codec_dai->pop_wait = 1;
777                 schedule_delayed_work(&rtd->delayed_work,
778                         msecs_to_jiffies(rtd->pmdown_time));
779         } else {
780                 /* capture streams can be powered down now */
781                 snd_soc_dapm_stream_event(rtd,
782                         codec_dai->driver->capture.stream_name,
783                         SND_SOC_DAPM_STREAM_STOP);
784         }
785
786         mutex_unlock(&pcm_mutex);
787         return 0;
788 }
789
790 /*
791  * Called by ALSA when the PCM substream is prepared, can set format, sample
792  * rate, etc.  This function is non atomic and can be called multiple times,
793  * it can refer to the runtime info.
794  */
795 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
796 {
797         struct snd_soc_pcm_runtime *rtd = substream->private_data;
798         struct snd_soc_platform *platform = rtd->platform;
799         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
800         struct snd_soc_dai *codec_dai = rtd->codec_dai;
801         int ret = 0;
802
803         mutex_lock(&pcm_mutex);
804
805         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
806                 ret = rtd->dai_link->ops->prepare(substream);
807                 if (ret < 0) {
808                         printk(KERN_ERR "asoc: machine prepare error\n");
809                         goto out;
810                 }
811         }
812
813         if (platform->driver->ops && platform->driver->ops->prepare) {
814                 ret = platform->driver->ops->prepare(substream);
815                 if (ret < 0) {
816                         printk(KERN_ERR "asoc: platform prepare error\n");
817                         goto out;
818                 }
819         }
820
821         if (codec_dai->driver->ops->prepare) {
822                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
823                 if (ret < 0) {
824                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
825                         goto out;
826                 }
827         }
828
829         if (cpu_dai->driver->ops->prepare) {
830                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
831                 if (ret < 0) {
832                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
833                         goto out;
834                 }
835         }
836
837         /* cancel any delayed stream shutdown that is pending */
838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
839             codec_dai->pop_wait) {
840                 codec_dai->pop_wait = 0;
841                 cancel_delayed_work(&rtd->delayed_work);
842         }
843
844         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
845                 snd_soc_dapm_stream_event(rtd,
846                                           codec_dai->driver->playback.stream_name,
847                                           SND_SOC_DAPM_STREAM_START);
848         else
849                 snd_soc_dapm_stream_event(rtd,
850                                           codec_dai->driver->capture.stream_name,
851                                           SND_SOC_DAPM_STREAM_START);
852
853         snd_soc_dai_digital_mute(codec_dai, 0);
854
855 out:
856         mutex_unlock(&pcm_mutex);
857         return ret;
858 }
859
860 /*
861  * Called by ALSA when the hardware params are set by application. This
862  * function can also be called multiple times and can allocate buffers
863  * (using snd_pcm_lib_* ). It's non-atomic.
864  */
865 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
866                                 struct snd_pcm_hw_params *params)
867 {
868         struct snd_soc_pcm_runtime *rtd = substream->private_data;
869         struct snd_soc_platform *platform = rtd->platform;
870         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
871         struct snd_soc_dai *codec_dai = rtd->codec_dai;
872         int ret = 0;
873
874         mutex_lock(&pcm_mutex);
875
876         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
877                 ret = rtd->dai_link->ops->hw_params(substream, params);
878                 if (ret < 0) {
879                         printk(KERN_ERR "asoc: machine hw_params failed\n");
880                         goto out;
881                 }
882         }
883
884         if (codec_dai->driver->ops->hw_params) {
885                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
886                 if (ret < 0) {
887                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
888                                 codec_dai->name);
889                         goto codec_err;
890                 }
891         }
892
893         if (cpu_dai->driver->ops->hw_params) {
894                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
895                 if (ret < 0) {
896                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
897                                 cpu_dai->name);
898                         goto interface_err;
899                 }
900         }
901
902         if (platform->driver->ops && platform->driver->ops->hw_params) {
903                 ret = platform->driver->ops->hw_params(substream, params);
904                 if (ret < 0) {
905                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
906                                 platform->name);
907                         goto platform_err;
908                 }
909         }
910
911         rtd->rate = params_rate(params);
912
913 out:
914         mutex_unlock(&pcm_mutex);
915         return ret;
916
917 platform_err:
918         if (cpu_dai->driver->ops->hw_free)
919                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
920
921 interface_err:
922         if (codec_dai->driver->ops->hw_free)
923                 codec_dai->driver->ops->hw_free(substream, codec_dai);
924
925 codec_err:
926         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
927                 rtd->dai_link->ops->hw_free(substream);
928
929         mutex_unlock(&pcm_mutex);
930         return ret;
931 }
932
933 /*
934  * Frees resources allocated by hw_params, can be called multiple times
935  */
936 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
937 {
938         struct snd_soc_pcm_runtime *rtd = substream->private_data;
939         struct snd_soc_platform *platform = rtd->platform;
940         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
941         struct snd_soc_dai *codec_dai = rtd->codec_dai;
942         struct snd_soc_codec *codec = rtd->codec;
943
944         mutex_lock(&pcm_mutex);
945
946         /* apply codec digital mute */
947         if (!codec->active)
948                 snd_soc_dai_digital_mute(codec_dai, 1);
949
950         /* free any machine hw params */
951         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
952                 rtd->dai_link->ops->hw_free(substream);
953
954         /* free any DMA resources */
955         if (platform->driver->ops && platform->driver->ops->hw_free)
956                 platform->driver->ops->hw_free(substream);
957
958         /* now free hw params for the DAIs  */
959         if (codec_dai->driver->ops->hw_free)
960                 codec_dai->driver->ops->hw_free(substream, codec_dai);
961
962         if (cpu_dai->driver->ops->hw_free)
963                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
964
965         mutex_unlock(&pcm_mutex);
966         return 0;
967 }
968
969 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
970 {
971         struct snd_soc_pcm_runtime *rtd = substream->private_data;
972         struct snd_soc_platform *platform = rtd->platform;
973         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
974         struct snd_soc_dai *codec_dai = rtd->codec_dai;
975         int ret;
976
977         if (codec_dai->driver->ops->trigger) {
978                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
979                 if (ret < 0)
980                         return ret;
981         }
982
983         if (platform->driver->ops && platform->driver->ops->trigger) {
984                 ret = platform->driver->ops->trigger(substream, cmd);
985                 if (ret < 0)
986                         return ret;
987         }
988
989         if (cpu_dai->driver->ops->trigger) {
990                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
991                 if (ret < 0)
992                         return ret;
993         }
994         return 0;
995 }
996
997 /*
998  * soc level wrapper for pointer callback
999  * If cpu_dai, codec_dai, platform driver has the delay callback, than
1000  * the runtime->delay will be updated accordingly.
1001  */
1002 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1003 {
1004         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1005         struct snd_soc_platform *platform = rtd->platform;
1006         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1007         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1008         struct snd_pcm_runtime *runtime = substream->runtime;
1009         snd_pcm_uframes_t offset = 0;
1010         snd_pcm_sframes_t delay = 0;
1011
1012         if (platform->driver->ops && platform->driver->ops->pointer)
1013                 offset = platform->driver->ops->pointer(substream);
1014
1015         if (cpu_dai->driver->ops->delay)
1016                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1017
1018         if (codec_dai->driver->ops->delay)
1019                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1020
1021         if (platform->driver->delay)
1022                 delay += platform->driver->delay(substream, codec_dai);
1023
1024         runtime->delay = delay;
1025
1026         return offset;
1027 }
1028
1029 /* ASoC PCM operations */
1030 static struct snd_pcm_ops soc_pcm_ops = {
1031         .open           = soc_pcm_open,
1032         .close          = soc_codec_close,
1033         .hw_params      = soc_pcm_hw_params,
1034         .hw_free        = soc_pcm_hw_free,
1035         .prepare        = soc_pcm_prepare,
1036         .trigger        = soc_pcm_trigger,
1037         .pointer        = soc_pcm_pointer,
1038 };
1039
1040 #ifdef CONFIG_PM_SLEEP
1041 /* powers down audio subsystem for suspend */
1042 int snd_soc_suspend(struct device *dev)
1043 {
1044         struct snd_soc_card *card = dev_get_drvdata(dev);
1045         struct snd_soc_codec *codec;
1046         int i;
1047
1048         /* If the initialization of this soc device failed, there is no codec
1049          * associated with it. Just bail out in this case.
1050          */
1051         if (list_empty(&card->codec_dev_list))
1052                 return 0;
1053
1054         /* Due to the resume being scheduled into a workqueue we could
1055         * suspend before that's finished - wait for it to complete.
1056          */
1057         snd_power_lock(card->snd_card);
1058         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1059         snd_power_unlock(card->snd_card);
1060
1061         /* we're going to block userspace touching us until resume completes */
1062         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1063
1064         /* mute any active DACs */
1065         for (i = 0; i < card->num_rtd; i++) {
1066                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1067                 struct snd_soc_dai_driver *drv = dai->driver;
1068
1069                 if (card->rtd[i].dai_link->ignore_suspend)
1070                         continue;
1071
1072                 if (drv->ops->digital_mute && dai->playback_active)
1073                         drv->ops->digital_mute(dai, 1);
1074         }
1075
1076         /* suspend all pcms */
1077         for (i = 0; i < card->num_rtd; i++) {
1078                 if (card->rtd[i].dai_link->ignore_suspend)
1079                         continue;
1080
1081                 snd_pcm_suspend_all(card->rtd[i].pcm);
1082         }
1083
1084         if (card->suspend_pre)
1085                 card->suspend_pre(card);
1086
1087         for (i = 0; i < card->num_rtd; i++) {
1088                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1089                 struct snd_soc_platform *platform = card->rtd[i].platform;
1090
1091                 if (card->rtd[i].dai_link->ignore_suspend)
1092                         continue;
1093
1094                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1095                         cpu_dai->driver->suspend(cpu_dai);
1096                 if (platform->driver->suspend && !platform->suspended) {
1097                         platform->driver->suspend(cpu_dai);
1098                         platform->suspended = 1;
1099                 }
1100         }
1101
1102         /* close any waiting streams and save state */
1103         for (i = 0; i < card->num_rtd; i++) {
1104                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1105                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1106         }
1107
1108         for (i = 0; i < card->num_rtd; i++) {
1109                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1110
1111                 if (card->rtd[i].dai_link->ignore_suspend)
1112                         continue;
1113
1114                 if (driver->playback.stream_name != NULL)
1115                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1116                                 SND_SOC_DAPM_STREAM_SUSPEND);
1117
1118                 if (driver->capture.stream_name != NULL)
1119                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1120                                 SND_SOC_DAPM_STREAM_SUSPEND);
1121         }
1122
1123         /* suspend all CODECs */
1124         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1125                 /* If there are paths active then the CODEC will be held with
1126                  * bias _ON and should not be suspended. */
1127                 if (!codec->suspended && codec->driver->suspend) {
1128                         switch (codec->dapm.bias_level) {
1129                         case SND_SOC_BIAS_STANDBY:
1130                         case SND_SOC_BIAS_OFF:
1131                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1132                                 codec->suspended = 1;
1133                                 break;
1134                         default:
1135                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1136                                 break;
1137                         }
1138                 }
1139         }
1140
1141         for (i = 0; i < card->num_rtd; i++) {
1142                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1143
1144                 if (card->rtd[i].dai_link->ignore_suspend)
1145                         continue;
1146
1147                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1148                         cpu_dai->driver->suspend(cpu_dai);
1149         }
1150
1151         if (card->suspend_post)
1152                 card->suspend_post(card);
1153
1154         return 0;
1155 }
1156 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1157
1158 /* deferred resume work, so resume can complete before we finished
1159  * setting our codec back up, which can be very slow on I2C
1160  */
1161 static void soc_resume_deferred(struct work_struct *work)
1162 {
1163         struct snd_soc_card *card =
1164                         container_of(work, struct snd_soc_card, deferred_resume_work);
1165         struct snd_soc_codec *codec;
1166         int i;
1167
1168         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1169          * so userspace apps are blocked from touching us
1170          */
1171
1172         dev_dbg(card->dev, "starting resume work\n");
1173
1174         /* Bring us up into D2 so that DAPM starts enabling things */
1175         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1176
1177         if (card->resume_pre)
1178                 card->resume_pre(card);
1179
1180         /* resume AC97 DAIs */
1181         for (i = 0; i < card->num_rtd; i++) {
1182                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1183
1184                 if (card->rtd[i].dai_link->ignore_suspend)
1185                         continue;
1186
1187                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1188                         cpu_dai->driver->resume(cpu_dai);
1189         }
1190
1191         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1192                 /* If the CODEC was idle over suspend then it will have been
1193                  * left with bias OFF or STANDBY and suspended so we must now
1194                  * resume.  Otherwise the suspend was suppressed.
1195                  */
1196                 if (codec->driver->resume && codec->suspended) {
1197                         switch (codec->dapm.bias_level) {
1198                         case SND_SOC_BIAS_STANDBY:
1199                         case SND_SOC_BIAS_OFF:
1200                                 codec->driver->resume(codec);
1201                                 codec->suspended = 0;
1202                                 break;
1203                         default:
1204                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1205                                 break;
1206                         }
1207                 }
1208         }
1209
1210         for (i = 0; i < card->num_rtd; i++) {
1211                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1212
1213                 if (card->rtd[i].dai_link->ignore_suspend)
1214                         continue;
1215
1216                 if (driver->playback.stream_name != NULL)
1217                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1218                                 SND_SOC_DAPM_STREAM_RESUME);
1219
1220                 if (driver->capture.stream_name != NULL)
1221                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1222                                 SND_SOC_DAPM_STREAM_RESUME);
1223         }
1224
1225         /* unmute any active DACs */
1226         for (i = 0; i < card->num_rtd; i++) {
1227                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1228                 struct snd_soc_dai_driver *drv = dai->driver;
1229
1230                 if (card->rtd[i].dai_link->ignore_suspend)
1231                         continue;
1232
1233                 if (drv->ops->digital_mute && dai->playback_active)
1234                         drv->ops->digital_mute(dai, 0);
1235         }
1236
1237         for (i = 0; i < card->num_rtd; i++) {
1238                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1239                 struct snd_soc_platform *platform = card->rtd[i].platform;
1240
1241                 if (card->rtd[i].dai_link->ignore_suspend)
1242                         continue;
1243
1244                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1245                         cpu_dai->driver->resume(cpu_dai);
1246                 if (platform->driver->resume && platform->suspended) {
1247                         platform->driver->resume(cpu_dai);
1248                         platform->suspended = 0;
1249                 }
1250         }
1251
1252         if (card->resume_post)
1253                 card->resume_post(card);
1254
1255         dev_dbg(card->dev, "resume work completed\n");
1256
1257         /* userspace can access us now we are back as we were before */
1258         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1259 }
1260
1261 /* powers up audio subsystem after a suspend */
1262 int snd_soc_resume(struct device *dev)
1263 {
1264         struct snd_soc_card *card = dev_get_drvdata(dev);
1265         int i;
1266
1267         /* AC97 devices might have other drivers hanging off them so
1268          * need to resume immediately.  Other drivers don't have that
1269          * problem and may take a substantial amount of time to resume
1270          * due to I/O costs and anti-pop so handle them out of line.
1271          */
1272         for (i = 0; i < card->num_rtd; i++) {
1273                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1274                 if (cpu_dai->driver->ac97_control) {
1275                         dev_dbg(dev, "Resuming AC97 immediately\n");
1276                         soc_resume_deferred(&card->deferred_resume_work);
1277                 } else {
1278                         dev_dbg(dev, "Scheduling resume work\n");
1279                         if (!schedule_work(&card->deferred_resume_work))
1280                                 dev_err(dev, "resume work item may be lost\n");
1281                 }
1282         }
1283
1284         return 0;
1285 }
1286 EXPORT_SYMBOL_GPL(snd_soc_resume);
1287 #else
1288 #define snd_soc_suspend NULL
1289 #define snd_soc_resume NULL
1290 #endif
1291
1292 static struct snd_soc_dai_ops null_dai_ops = {
1293 };
1294
1295 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1296 {
1297         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1298         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1299         struct snd_soc_codec *codec;
1300         struct snd_soc_platform *platform;
1301         struct snd_soc_dai *codec_dai, *cpu_dai;
1302
1303         if (rtd->complete)
1304                 return 1;
1305         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1306
1307         /* do we already have the CPU DAI for this link ? */
1308         if (rtd->cpu_dai) {
1309                 goto find_codec;
1310         }
1311         /* no, then find CPU DAI from registered DAIs*/
1312         list_for_each_entry(cpu_dai, &dai_list, list) {
1313                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1314
1315                         if (!try_module_get(cpu_dai->dev->driver->owner))
1316                                 return -ENODEV;
1317
1318                         rtd->cpu_dai = cpu_dai;
1319                         goto find_codec;
1320                 }
1321         }
1322         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1323                         dai_link->cpu_dai_name);
1324
1325 find_codec:
1326         /* do we already have the CODEC for this link ? */
1327         if (rtd->codec) {
1328                 goto find_platform;
1329         }
1330
1331         /* no, then find CODEC from registered CODECs*/
1332         list_for_each_entry(codec, &codec_list, list) {
1333                 if (!strcmp(codec->name, dai_link->codec_name)) {
1334                         rtd->codec = codec;
1335
1336                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1337                         list_for_each_entry(codec_dai, &dai_list, list) {
1338                                 if (codec->dev == codec_dai->dev &&
1339                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1340                                         rtd->codec_dai = codec_dai;
1341                                         goto find_platform;
1342                                 }
1343                         }
1344                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1345                                         dai_link->codec_dai_name);
1346
1347                         goto find_platform;
1348                 }
1349         }
1350         dev_dbg(card->dev, "CODEC %s not registered\n",
1351                         dai_link->codec_name);
1352
1353 find_platform:
1354         /* do we already have the CODEC DAI for this link ? */
1355         if (rtd->platform) {
1356                 goto out;
1357         }
1358         /* no, then find CPU DAI from registered DAIs*/
1359         list_for_each_entry(platform, &platform_list, list) {
1360                 if (!strcmp(platform->name, dai_link->platform_name)) {
1361                         rtd->platform = platform;
1362                         goto out;
1363                 }
1364         }
1365
1366         dev_dbg(card->dev, "platform %s not registered\n",
1367                         dai_link->platform_name);
1368         return 0;
1369
1370 out:
1371         /* mark rtd as complete if we found all 4 of our client devices */
1372         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1373                 rtd->complete = 1;
1374                 card->num_rtd++;
1375         }
1376         return 1;
1377 }
1378
1379 static void soc_remove_codec(struct snd_soc_codec *codec)
1380 {
1381         int err;
1382
1383         if (codec->driver->remove) {
1384                 err = codec->driver->remove(codec);
1385                 if (err < 0)
1386                         dev_err(codec->dev,
1387                                 "asoc: failed to remove %s: %d\n",
1388                                 codec->name, err);
1389         }
1390
1391         /* Make sure all DAPM widgets are freed */
1392         snd_soc_dapm_free(&codec->dapm);
1393
1394         soc_cleanup_codec_debugfs(codec);
1395         codec->probed = 0;
1396         list_del(&codec->card_list);
1397         module_put(codec->dev->driver->owner);
1398 }
1399
1400 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1401 {
1402         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1403         struct snd_soc_codec *codec = rtd->codec;
1404         struct snd_soc_platform *platform = rtd->platform;
1405         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1406         int err;
1407
1408         /* unregister the rtd device */
1409         if (rtd->dev_registered) {
1410                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1411                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1412                 device_unregister(&rtd->dev);
1413                 rtd->dev_registered = 0;
1414         }
1415
1416         /* remove the CODEC DAI */
1417         if (codec_dai && codec_dai->probed) {
1418                 if (codec_dai->driver->remove) {
1419                         err = codec_dai->driver->remove(codec_dai);
1420                         if (err < 0)
1421                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1422                 }
1423                 codec_dai->probed = 0;
1424                 list_del(&codec_dai->card_list);
1425         }
1426
1427         /* remove the platform */
1428         if (platform && platform->probed) {
1429                 if (platform->driver->remove) {
1430                         err = platform->driver->remove(platform);
1431                         if (err < 0)
1432                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1433                 }
1434                 platform->probed = 0;
1435                 list_del(&platform->card_list);
1436                 module_put(platform->dev->driver->owner);
1437         }
1438
1439         /* remove the CODEC */
1440         if (codec && codec->probed)
1441                 soc_remove_codec(codec);
1442
1443         /* remove the cpu_dai */
1444         if (cpu_dai && cpu_dai->probed) {
1445                 if (cpu_dai->driver->remove) {
1446                         err = cpu_dai->driver->remove(cpu_dai);
1447                         if (err < 0)
1448                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1449                 }
1450                 cpu_dai->probed = 0;
1451                 list_del(&cpu_dai->card_list);
1452                 module_put(cpu_dai->dev->driver->owner);
1453         }
1454 }
1455
1456 static void soc_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         card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
1924                                                      card->debugfs_card_root);
1925         if (!card->dapm.debugfs_dapm)
1926                 printk(KERN_WARNING
1927                        "Failed to create card DAPM debugfs directory\n");
1928
1929         snd_soc_dapm_debugfs_init(&card->dapm);
1930 #endif
1931
1932         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1933                  "%s",  card->name);
1934         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1935                  "%s", card->name);
1936
1937         if (card->late_probe) {
1938                 ret = card->late_probe(card);
1939                 if (ret < 0) {
1940                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1941                                 card->name, ret);
1942                         goto probe_aux_dev_err;
1943                 }
1944         }
1945
1946         ret = snd_card_register(card->snd_card);
1947         if (ret < 0) {
1948                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1949                 goto probe_aux_dev_err;
1950         }
1951
1952 #ifdef CONFIG_SND_SOC_AC97_BUS
1953         /* register any AC97 codecs */
1954         for (i = 0; i < card->num_rtd; i++) {
1955                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1956                 if (ret < 0) {
1957                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1958                         while (--i >= 0)
1959                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1960                         goto probe_aux_dev_err;
1961                 }
1962         }
1963 #endif
1964
1965         card->instantiated = 1;
1966         mutex_unlock(&card->mutex);
1967         return;
1968
1969 probe_aux_dev_err:
1970         for (i = 0; i < card->num_aux_devs; i++)
1971                 soc_remove_aux_dev(card, i);
1972
1973 probe_dai_err:
1974         soc_remove_dai_links(card);
1975
1976 card_probe_error:
1977         if (card->remove)
1978                 card->remove(card);
1979
1980         snd_card_free(card->snd_card);
1981
1982         mutex_unlock(&card->mutex);
1983 }
1984
1985 /*
1986  * Attempt to initialise any uninitialised cards.  Must be called with
1987  * client_mutex.
1988  */
1989 static void snd_soc_instantiate_cards(void)
1990 {
1991         struct snd_soc_card *card;
1992         list_for_each_entry(card, &card_list, list)
1993                 snd_soc_instantiate_card(card);
1994 }
1995
1996 /* probes a new socdev */
1997 static int soc_probe(struct platform_device *pdev)
1998 {
1999         struct snd_soc_card *card = platform_get_drvdata(pdev);
2000         int ret = 0;
2001
2002         /*
2003          * no card, so machine driver should be registering card
2004          * we should not be here in that case so ret error
2005          */
2006         if (!card)
2007                 return -EINVAL;
2008
2009         /* Bodge while we unpick instantiation */
2010         card->dev = &pdev->dev;
2011
2012         ret = snd_soc_register_card(card);
2013         if (ret != 0) {
2014                 dev_err(&pdev->dev, "Failed to register card\n");
2015                 return ret;
2016         }
2017
2018         return 0;
2019 }
2020
2021 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2022 {
2023         int i;
2024
2025         /* make sure any delayed work runs */
2026         for (i = 0; i < card->num_rtd; i++) {
2027                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2028                 flush_delayed_work_sync(&rtd->delayed_work);
2029         }
2030
2031         /* remove auxiliary devices */
2032         for (i = 0; i < card->num_aux_devs; i++)
2033                 soc_remove_aux_dev(card, i);
2034
2035         /* remove and free each DAI */
2036         soc_remove_dai_links(card);
2037
2038         soc_cleanup_card_debugfs(card);
2039
2040         /* remove the card */
2041         if (card->remove)
2042                 card->remove(card);
2043
2044         kfree(card->rtd);
2045         snd_card_free(card->snd_card);
2046         return 0;
2047
2048 }
2049
2050 /* removes a socdev */
2051 static int soc_remove(struct platform_device *pdev)
2052 {
2053         struct snd_soc_card *card = platform_get_drvdata(pdev);
2054
2055         snd_soc_unregister_card(card);
2056         return 0;
2057 }
2058
2059 int snd_soc_poweroff(struct device *dev)
2060 {
2061         struct snd_soc_card *card = dev_get_drvdata(dev);
2062         int i;
2063
2064         if (!card->instantiated)
2065                 return 0;
2066
2067         /* Flush out pmdown_time work - we actually do want to run it
2068          * now, we're shutting down so no imminent restart. */
2069         for (i = 0; i < card->num_rtd; i++) {
2070                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2071                 flush_delayed_work_sync(&rtd->delayed_work);
2072         }
2073
2074         snd_soc_dapm_shutdown(card);
2075
2076         return 0;
2077 }
2078 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2079
2080 const struct dev_pm_ops snd_soc_pm_ops = {
2081         .suspend = snd_soc_suspend,
2082         .resume = snd_soc_resume,
2083         .poweroff = snd_soc_poweroff,
2084 };
2085 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2086
2087 /* ASoC platform driver */
2088 static struct platform_driver soc_driver = {
2089         .driver         = {
2090                 .name           = "soc-audio",
2091                 .owner          = THIS_MODULE,
2092                 .pm             = &snd_soc_pm_ops,
2093         },
2094         .probe          = soc_probe,
2095         .remove         = soc_remove,
2096 };
2097
2098 /* create a new pcm */
2099 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2100 {
2101         struct snd_soc_codec *codec = rtd->codec;
2102         struct snd_soc_platform *platform = rtd->platform;
2103         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2104         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2105         struct snd_pcm *pcm;
2106         char new_name[64];
2107         int ret = 0, playback = 0, capture = 0;
2108
2109         /* check client and interface hw capabilities */
2110         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2111                         rtd->dai_link->stream_name, codec_dai->name, num);
2112
2113         if (codec_dai->driver->playback.channels_min)
2114                 playback = 1;
2115         if (codec_dai->driver->capture.channels_min)
2116                 capture = 1;
2117
2118         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2119         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2120                         num, playback, capture, &pcm);
2121         if (ret < 0) {
2122                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2123                 return ret;
2124         }
2125
2126         rtd->pcm = pcm;
2127         pcm->private_data = rtd;
2128         if (platform->driver->ops) {
2129                 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2130                 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2131                 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2132                 soc_pcm_ops.copy = platform->driver->ops->copy;
2133                 soc_pcm_ops.silence = platform->driver->ops->silence;
2134                 soc_pcm_ops.ack = platform->driver->ops->ack;
2135                 soc_pcm_ops.page = platform->driver->ops->page;
2136         }
2137
2138         if (playback)
2139                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2140
2141         if (capture)
2142                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2143
2144         if (platform->driver->pcm_new) {
2145                 ret = platform->driver->pcm_new(rtd->card->snd_card,
2146                                                 codec_dai, pcm);
2147                 if (ret < 0) {
2148                         pr_err("asoc: platform pcm constructor failed\n");
2149                         return ret;
2150                 }
2151         }
2152
2153         pcm->private_free = platform->driver->pcm_free;
2154         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2155                 cpu_dai->name);
2156         return ret;
2157 }
2158
2159 /**
2160  * snd_soc_codec_volatile_register: Report if a register is volatile.
2161  *
2162  * @codec: CODEC to query.
2163  * @reg: Register to query.
2164  *
2165  * Boolean function indiciating if a CODEC register is volatile.
2166  */
2167 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2168                                     unsigned int reg)
2169 {
2170         if (codec->volatile_register)
2171                 return codec->volatile_register(codec, reg);
2172         else
2173                 return 0;
2174 }
2175 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2176
2177 /**
2178  * snd_soc_codec_readable_register: Report if a register is readable.
2179  *
2180  * @codec: CODEC to query.
2181  * @reg: Register to query.
2182  *
2183  * Boolean function indicating if a CODEC register is readable.
2184  */
2185 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2186                                     unsigned int reg)
2187 {
2188         if (codec->readable_register)
2189                 return codec->readable_register(codec, reg);
2190         else
2191                 return 0;
2192 }
2193 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2194
2195 /**
2196  * snd_soc_codec_writable_register: Report if a register is writable.
2197  *
2198  * @codec: CODEC to query.
2199  * @reg: Register to query.
2200  *
2201  * Boolean function indicating if a CODEC register is writable.
2202  */
2203 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2204                                     unsigned int reg)
2205 {
2206         if (codec->writable_register)
2207                 return codec->writable_register(codec, reg);
2208         else
2209                 return 0;
2210 }
2211 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2212
2213 /**
2214  * snd_soc_new_ac97_codec - initailise AC97 device
2215  * @codec: audio codec
2216  * @ops: AC97 bus operations
2217  * @num: AC97 codec number
2218  *
2219  * Initialises AC97 codec resources for use by ad-hoc devices only.
2220  */
2221 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2222         struct snd_ac97_bus_ops *ops, int num)
2223 {
2224         mutex_lock(&codec->mutex);
2225
2226         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2227         if (codec->ac97 == NULL) {
2228                 mutex_unlock(&codec->mutex);
2229                 return -ENOMEM;
2230         }
2231
2232         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2233         if (codec->ac97->bus == NULL) {
2234                 kfree(codec->ac97);
2235                 codec->ac97 = NULL;
2236                 mutex_unlock(&codec->mutex);
2237                 return -ENOMEM;
2238         }
2239
2240         codec->ac97->bus->ops = ops;
2241         codec->ac97->num = num;
2242
2243         /*
2244          * Mark the AC97 device to be created by us. This way we ensure that the
2245          * device will be registered with the device subsystem later on.
2246          */
2247         codec->ac97_created = 1;
2248
2249         mutex_unlock(&codec->mutex);
2250         return 0;
2251 }
2252 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2253
2254 /**
2255  * snd_soc_free_ac97_codec - free AC97 codec device
2256  * @codec: audio codec
2257  *
2258  * Frees AC97 codec device resources.
2259  */
2260 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2261 {
2262         mutex_lock(&codec->mutex);
2263 #ifdef CONFIG_SND_SOC_AC97_BUS
2264         soc_unregister_ac97_dai_link(codec);
2265 #endif
2266         kfree(codec->ac97->bus);
2267         kfree(codec->ac97);
2268         codec->ac97 = NULL;
2269         codec->ac97_created = 0;
2270         mutex_unlock(&codec->mutex);
2271 }
2272 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2273
2274 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2275 {
2276         unsigned int ret;
2277
2278         ret = codec->read(codec, reg);
2279         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2280         trace_snd_soc_reg_read(codec, reg, ret);
2281
2282         return ret;
2283 }
2284 EXPORT_SYMBOL_GPL(snd_soc_read);
2285
2286 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2287                            unsigned int reg, unsigned int val)
2288 {
2289         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2290         trace_snd_soc_reg_write(codec, reg, val);
2291         return codec->write(codec, reg, val);
2292 }
2293 EXPORT_SYMBOL_GPL(snd_soc_write);
2294
2295 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2296                                     unsigned int reg, const void *data, size_t len)
2297 {
2298         return codec->bulk_write_raw(codec, reg, data, len);
2299 }
2300 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2301
2302 /**
2303  * snd_soc_update_bits - update codec register bits
2304  * @codec: audio codec
2305  * @reg: codec register
2306  * @mask: register mask
2307  * @value: new value
2308  *
2309  * Writes new register value.
2310  *
2311  * Returns 1 for change, 0 for no change, or negative error code.
2312  */
2313 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2314                                 unsigned int mask, unsigned int value)
2315 {
2316         int change;
2317         unsigned int old, new;
2318         int ret;
2319
2320         ret = snd_soc_read(codec, reg);
2321         if (ret < 0)
2322                 return ret;
2323
2324         old = ret;
2325         new = (old & ~mask) | value;
2326         change = old != new;
2327         if (change) {
2328                 ret = snd_soc_write(codec, reg, new);
2329                 if (ret < 0)
2330                         return ret;
2331         }
2332
2333         return change;
2334 }
2335 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2336
2337 /**
2338  * snd_soc_update_bits_locked - update codec register bits
2339  * @codec: audio codec
2340  * @reg: codec register
2341  * @mask: register mask
2342  * @value: new value
2343  *
2344  * Writes new register value, and takes the codec mutex.
2345  *
2346  * Returns 1 for change else 0.
2347  */
2348 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2349                                unsigned short reg, unsigned int mask,
2350                                unsigned int value)
2351 {
2352         int change;
2353
2354         mutex_lock(&codec->mutex);
2355         change = snd_soc_update_bits(codec, reg, mask, value);
2356         mutex_unlock(&codec->mutex);
2357
2358         return change;
2359 }
2360 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2361
2362 /**
2363  * snd_soc_test_bits - test register for change
2364  * @codec: audio codec
2365  * @reg: codec register
2366  * @mask: register mask
2367  * @value: new value
2368  *
2369  * Tests a register with a new value and checks if the new value is
2370  * different from the old value.
2371  *
2372  * Returns 1 for change else 0.
2373  */
2374 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2375                                 unsigned int mask, unsigned int value)
2376 {
2377         int change;
2378         unsigned int old, new;
2379
2380         old = snd_soc_read(codec, reg);
2381         new = (old & ~mask) | value;
2382         change = old != new;
2383
2384         return change;
2385 }
2386 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2387
2388 /**
2389  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2390  * @substream: the pcm substream
2391  * @hw: the hardware parameters
2392  *
2393  * Sets the substream runtime hardware parameters.
2394  */
2395 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2396         const struct snd_pcm_hardware *hw)
2397 {
2398         struct snd_pcm_runtime *runtime = substream->runtime;
2399         runtime->hw.info = hw->info;
2400         runtime->hw.formats = hw->formats;
2401         runtime->hw.period_bytes_min = hw->period_bytes_min;
2402         runtime->hw.period_bytes_max = hw->period_bytes_max;
2403         runtime->hw.periods_min = hw->periods_min;
2404         runtime->hw.periods_max = hw->periods_max;
2405         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2406         runtime->hw.fifo_size = hw->fifo_size;
2407         return 0;
2408 }
2409 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2410
2411 /**
2412  * snd_soc_cnew - create new control
2413  * @_template: control template
2414  * @data: control private data
2415  * @long_name: control long name
2416  * @prefix: control name prefix
2417  *
2418  * Create a new mixer control from a template control.
2419  *
2420  * Returns 0 for success, else error.
2421  */
2422 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2423                                   void *data, char *long_name,
2424                                   const char *prefix)
2425 {
2426         struct snd_kcontrol_new template;
2427         struct snd_kcontrol *kcontrol;
2428         char *name = NULL;
2429         int name_len;
2430
2431         memcpy(&template, _template, sizeof(template));
2432         template.index = 0;
2433
2434         if (!long_name)
2435                 long_name = template.name;
2436
2437         if (prefix) {
2438                 name_len = strlen(long_name) + strlen(prefix) + 2;
2439                 name = kmalloc(name_len, GFP_ATOMIC);
2440                 if (!name)
2441                         return NULL;
2442
2443                 snprintf(name, name_len, "%s %s", prefix, long_name);
2444
2445                 template.name = name;
2446         } else {
2447                 template.name = long_name;
2448         }
2449
2450         kcontrol = snd_ctl_new1(&template, data);
2451
2452         kfree(name);
2453
2454         return kcontrol;
2455 }
2456 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2457
2458 /**
2459  * snd_soc_add_controls - add an array of controls to a codec.
2460  * Convienience function to add a list of controls. Many codecs were
2461  * duplicating this code.
2462  *
2463  * @codec: codec to add controls to
2464  * @controls: array of controls to add
2465  * @num_controls: number of elements in the array
2466  *
2467  * Return 0 for success, else error.
2468  */
2469 int snd_soc_add_controls(struct snd_soc_codec *codec,
2470         const struct snd_kcontrol_new *controls, int num_controls)
2471 {
2472         struct snd_card *card = codec->card->snd_card;
2473         int err, i;
2474
2475         for (i = 0; i < num_controls; i++) {
2476                 const struct snd_kcontrol_new *control = &controls[i];
2477                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2478                                                      control->name,
2479                                                      codec->name_prefix));
2480                 if (err < 0) {
2481                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2482                                 codec->name, control->name, err);
2483                         return err;
2484                 }
2485         }
2486
2487         return 0;
2488 }
2489 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2490
2491 /**
2492  * snd_soc_info_enum_double - enumerated double mixer info callback
2493  * @kcontrol: mixer control
2494  * @uinfo: control element information
2495  *
2496  * Callback to provide information about a double enumerated
2497  * mixer control.
2498  *
2499  * Returns 0 for success.
2500  */
2501 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2502         struct snd_ctl_elem_info *uinfo)
2503 {
2504         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2505
2506         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2507         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2508         uinfo->value.enumerated.items = e->max;
2509
2510         if (uinfo->value.enumerated.item > e->max - 1)
2511                 uinfo->value.enumerated.item = e->max - 1;
2512         strcpy(uinfo->value.enumerated.name,
2513                 e->texts[uinfo->value.enumerated.item]);
2514         return 0;
2515 }
2516 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2517
2518 /**
2519  * snd_soc_get_enum_double - enumerated double mixer get callback
2520  * @kcontrol: mixer control
2521  * @ucontrol: control element information
2522  *
2523  * Callback to get the value of a double enumerated mixer.
2524  *
2525  * Returns 0 for success.
2526  */
2527 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2528         struct snd_ctl_elem_value *ucontrol)
2529 {
2530         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2531         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2532         unsigned int val, bitmask;
2533
2534         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2535                 ;
2536         val = snd_soc_read(codec, e->reg);
2537         ucontrol->value.enumerated.item[0]
2538                 = (val >> e->shift_l) & (bitmask - 1);
2539         if (e->shift_l != e->shift_r)
2540                 ucontrol->value.enumerated.item[1] =
2541                         (val >> e->shift_r) & (bitmask - 1);
2542
2543         return 0;
2544 }
2545 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2546
2547 /**
2548  * snd_soc_put_enum_double - enumerated double mixer put callback
2549  * @kcontrol: mixer control
2550  * @ucontrol: control element information
2551  *
2552  * Callback to set the value of a double enumerated mixer.
2553  *
2554  * Returns 0 for success.
2555  */
2556 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2557         struct snd_ctl_elem_value *ucontrol)
2558 {
2559         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2560         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2561         unsigned int val;
2562         unsigned int mask, bitmask;
2563
2564         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2565                 ;
2566         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2567                 return -EINVAL;
2568         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2569         mask = (bitmask - 1) << e->shift_l;
2570         if (e->shift_l != e->shift_r) {
2571                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2572                         return -EINVAL;
2573                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2574                 mask |= (bitmask - 1) << e->shift_r;
2575         }
2576
2577         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2578 }
2579 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2580
2581 /**
2582  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2583  * @kcontrol: mixer control
2584  * @ucontrol: control element information
2585  *
2586  * Callback to get the value of a double semi enumerated mixer.
2587  *
2588  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2589  * used for handling bitfield coded enumeration for example.
2590  *
2591  * Returns 0 for success.
2592  */
2593 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2594         struct snd_ctl_elem_value *ucontrol)
2595 {
2596         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2597         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2598         unsigned int reg_val, val, mux;
2599
2600         reg_val = snd_soc_read(codec, e->reg);
2601         val = (reg_val >> e->shift_l) & e->mask;
2602         for (mux = 0; mux < e->max; mux++) {
2603                 if (val == e->values[mux])
2604                         break;
2605         }
2606         ucontrol->value.enumerated.item[0] = mux;
2607         if (e->shift_l != e->shift_r) {
2608                 val = (reg_val >> e->shift_r) & e->mask;
2609                 for (mux = 0; mux < e->max; mux++) {
2610                         if (val == e->values[mux])
2611                                 break;
2612                 }
2613                 ucontrol->value.enumerated.item[1] = mux;
2614         }
2615
2616         return 0;
2617 }
2618 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2619
2620 /**
2621  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2622  * @kcontrol: mixer control
2623  * @ucontrol: control element information
2624  *
2625  * Callback to set the value of a double semi enumerated mixer.
2626  *
2627  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2628  * used for handling bitfield coded enumeration for example.
2629  *
2630  * Returns 0 for success.
2631  */
2632 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2633         struct snd_ctl_elem_value *ucontrol)
2634 {
2635         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2636         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2637         unsigned int val;
2638         unsigned int mask;
2639
2640         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2641                 return -EINVAL;
2642         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2643         mask = e->mask << e->shift_l;
2644         if (e->shift_l != e->shift_r) {
2645                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2646                         return -EINVAL;
2647                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2648                 mask |= e->mask << e->shift_r;
2649         }
2650
2651         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2652 }
2653 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2654
2655 /**
2656  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2657  * @kcontrol: mixer control
2658  * @uinfo: control element information
2659  *
2660  * Callback to provide information about an external enumerated
2661  * single mixer.
2662  *
2663  * Returns 0 for success.
2664  */
2665 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2666         struct snd_ctl_elem_info *uinfo)
2667 {
2668         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2669
2670         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2671         uinfo->count = 1;
2672         uinfo->value.enumerated.items = e->max;
2673
2674         if (uinfo->value.enumerated.item > e->max - 1)
2675                 uinfo->value.enumerated.item = e->max - 1;
2676         strcpy(uinfo->value.enumerated.name,
2677                 e->texts[uinfo->value.enumerated.item]);
2678         return 0;
2679 }
2680 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2681
2682 /**
2683  * snd_soc_info_volsw_ext - external single mixer info callback
2684  * @kcontrol: mixer control
2685  * @uinfo: control element information
2686  *
2687  * Callback to provide information about a single external mixer control.
2688  *
2689  * Returns 0 for success.
2690  */
2691 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2692         struct snd_ctl_elem_info *uinfo)
2693 {
2694         int max = kcontrol->private_value;
2695
2696         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2697                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2698         else
2699                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2700
2701         uinfo->count = 1;
2702         uinfo->value.integer.min = 0;
2703         uinfo->value.integer.max = max;
2704         return 0;
2705 }
2706 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2707
2708 /**
2709  * snd_soc_info_volsw - single mixer info callback
2710  * @kcontrol: mixer control
2711  * @uinfo: control element information
2712  *
2713  * Callback to provide information about a single mixer control.
2714  *
2715  * Returns 0 for success.
2716  */
2717 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2718         struct snd_ctl_elem_info *uinfo)
2719 {
2720         struct soc_mixer_control *mc =
2721                 (struct soc_mixer_control *)kcontrol->private_value;
2722         int platform_max;
2723         unsigned int shift = mc->shift;
2724         unsigned int rshift = mc->rshift;
2725
2726         if (!mc->platform_max)
2727                 mc->platform_max = mc->max;
2728         platform_max = mc->platform_max;
2729
2730         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2731                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2732         else
2733                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2734
2735         uinfo->count = shift == rshift ? 1 : 2;
2736         uinfo->value.integer.min = 0;
2737         uinfo->value.integer.max = platform_max;
2738         return 0;
2739 }
2740 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2741
2742 /**
2743  * snd_soc_get_volsw - single mixer get callback
2744  * @kcontrol: mixer control
2745  * @ucontrol: control element information
2746  *
2747  * Callback to get the value of a single mixer control.
2748  *
2749  * Returns 0 for success.
2750  */
2751 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2752         struct snd_ctl_elem_value *ucontrol)
2753 {
2754         struct soc_mixer_control *mc =
2755                 (struct soc_mixer_control *)kcontrol->private_value;
2756         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2757         unsigned int reg = mc->reg;
2758         unsigned int shift = mc->shift;
2759         unsigned int rshift = mc->rshift;
2760         int max = mc->max;
2761         unsigned int mask = (1 << fls(max)) - 1;
2762         unsigned int invert = mc->invert;
2763
2764         ucontrol->value.integer.value[0] =
2765                 (snd_soc_read(codec, reg) >> shift) & mask;
2766         if (shift != rshift)
2767                 ucontrol->value.integer.value[1] =
2768                         (snd_soc_read(codec, reg) >> rshift) & mask;
2769         if (invert) {
2770                 ucontrol->value.integer.value[0] =
2771                         max - ucontrol->value.integer.value[0];
2772                 if (shift != rshift)
2773                         ucontrol->value.integer.value[1] =
2774                                 max - ucontrol->value.integer.value[1];
2775         }
2776
2777         return 0;
2778 }
2779 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2780
2781 /**
2782  * snd_soc_put_volsw - single mixer put callback
2783  * @kcontrol: mixer control
2784  * @ucontrol: control element information
2785  *
2786  * Callback to set the value of a single mixer control.
2787  *
2788  * Returns 0 for success.
2789  */
2790 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2791         struct snd_ctl_elem_value *ucontrol)
2792 {
2793         struct soc_mixer_control *mc =
2794                 (struct soc_mixer_control *)kcontrol->private_value;
2795         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2796         unsigned int reg = mc->reg;
2797         unsigned int shift = mc->shift;
2798         unsigned int rshift = mc->rshift;
2799         int max = mc->max;
2800         unsigned int mask = (1 << fls(max)) - 1;
2801         unsigned int invert = mc->invert;
2802         unsigned int val, val2, val_mask;
2803
2804         val = (ucontrol->value.integer.value[0] & mask);
2805         if (invert)
2806                 val = max - val;
2807         val_mask = mask << shift;
2808         val = val << shift;
2809         if (shift != rshift) {
2810                 val2 = (ucontrol->value.integer.value[1] & mask);
2811                 if (invert)
2812                         val2 = max - val2;
2813                 val_mask |= mask << rshift;
2814                 val |= val2 << rshift;
2815         }
2816         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2817 }
2818 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2819
2820 /**
2821  * snd_soc_info_volsw_2r - double mixer info callback
2822  * @kcontrol: mixer control
2823  * @uinfo: control element information
2824  *
2825  * Callback to provide information about a double mixer control that
2826  * spans 2 codec registers.
2827  *
2828  * Returns 0 for success.
2829  */
2830 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2831         struct snd_ctl_elem_info *uinfo)
2832 {
2833         struct soc_mixer_control *mc =
2834                 (struct soc_mixer_control *)kcontrol->private_value;
2835         int platform_max;
2836
2837         if (!mc->platform_max)
2838                 mc->platform_max = mc->max;
2839         platform_max = mc->platform_max;
2840
2841         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2842                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2843         else
2844                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2845
2846         uinfo->count = 2;
2847         uinfo->value.integer.min = 0;
2848         uinfo->value.integer.max = platform_max;
2849         return 0;
2850 }
2851 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2852
2853 /**
2854  * snd_soc_get_volsw_2r - double mixer get callback
2855  * @kcontrol: mixer control
2856  * @ucontrol: control element information
2857  *
2858  * Callback to get the value of a double mixer control that spans 2 registers.
2859  *
2860  * Returns 0 for success.
2861  */
2862 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2863         struct snd_ctl_elem_value *ucontrol)
2864 {
2865         struct soc_mixer_control *mc =
2866                 (struct soc_mixer_control *)kcontrol->private_value;
2867         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2868         unsigned int reg = mc->reg;
2869         unsigned int reg2 = mc->rreg;
2870         unsigned int shift = mc->shift;
2871         int max = mc->max;
2872         unsigned int mask = (1 << fls(max)) - 1;
2873         unsigned int invert = mc->invert;
2874
2875         ucontrol->value.integer.value[0] =
2876                 (snd_soc_read(codec, reg) >> shift) & mask;
2877         ucontrol->value.integer.value[1] =
2878                 (snd_soc_read(codec, reg2) >> shift) & mask;
2879         if (invert) {
2880                 ucontrol->value.integer.value[0] =
2881                         max - ucontrol->value.integer.value[0];
2882                 ucontrol->value.integer.value[1] =
2883                         max - ucontrol->value.integer.value[1];
2884         }
2885
2886         return 0;
2887 }
2888 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2889
2890 /**
2891  * snd_soc_put_volsw_2r - double mixer set callback
2892  * @kcontrol: mixer control
2893  * @ucontrol: control element information
2894  *
2895  * Callback to set the value of a double mixer control that spans 2 registers.
2896  *
2897  * Returns 0 for success.
2898  */
2899 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2900         struct snd_ctl_elem_value *ucontrol)
2901 {
2902         struct soc_mixer_control *mc =
2903                 (struct soc_mixer_control *)kcontrol->private_value;
2904         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2905         unsigned int reg = mc->reg;
2906         unsigned int reg2 = mc->rreg;
2907         unsigned int shift = mc->shift;
2908         int max = mc->max;
2909         unsigned int mask = (1 << fls(max)) - 1;
2910         unsigned int invert = mc->invert;
2911         int err;
2912         unsigned int val, val2, val_mask;
2913
2914         val_mask = mask << shift;
2915         val = (ucontrol->value.integer.value[0] & mask);
2916         val2 = (ucontrol->value.integer.value[1] & mask);
2917
2918         if (invert) {
2919                 val = max - val;
2920                 val2 = max - val2;
2921         }
2922
2923         val = val << shift;
2924         val2 = val2 << shift;
2925
2926         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2927         if (err < 0)
2928                 return err;
2929
2930         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2931         return err;
2932 }
2933 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2934
2935 /**
2936  * snd_soc_info_volsw_s8 - signed mixer info callback
2937  * @kcontrol: mixer control
2938  * @uinfo: control element information
2939  *
2940  * Callback to provide information about a signed mixer control.
2941  *
2942  * Returns 0 for success.
2943  */
2944 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2945         struct snd_ctl_elem_info *uinfo)
2946 {
2947         struct soc_mixer_control *mc =
2948                 (struct soc_mixer_control *)kcontrol->private_value;
2949         int platform_max;
2950         int min = mc->min;
2951
2952         if (!mc->platform_max)
2953                 mc->platform_max = mc->max;
2954         platform_max = mc->platform_max;
2955
2956         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2957         uinfo->count = 2;
2958         uinfo->value.integer.min = 0;
2959         uinfo->value.integer.max = platform_max - min;
2960         return 0;
2961 }
2962 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2963
2964 /**
2965  * snd_soc_get_volsw_s8 - signed mixer get callback
2966  * @kcontrol: mixer control
2967  * @ucontrol: control element information
2968  *
2969  * Callback to get the value of a signed mixer control.
2970  *
2971  * Returns 0 for success.
2972  */
2973 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2974         struct snd_ctl_elem_value *ucontrol)
2975 {
2976         struct soc_mixer_control *mc =
2977                 (struct soc_mixer_control *)kcontrol->private_value;
2978         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2979         unsigned int reg = mc->reg;
2980         int min = mc->min;
2981         int val = snd_soc_read(codec, reg);
2982
2983         ucontrol->value.integer.value[0] =
2984                 ((signed char)(val & 0xff))-min;
2985         ucontrol->value.integer.value[1] =
2986                 ((signed char)((val >> 8) & 0xff))-min;
2987         return 0;
2988 }
2989 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2990
2991 /**
2992  * snd_soc_put_volsw_sgn - signed mixer put callback
2993  * @kcontrol: mixer control
2994  * @ucontrol: control element information
2995  *
2996  * Callback to set the value of a signed mixer control.
2997  *
2998  * Returns 0 for success.
2999  */
3000 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
3001         struct snd_ctl_elem_value *ucontrol)
3002 {
3003         struct soc_mixer_control *mc =
3004                 (struct soc_mixer_control *)kcontrol->private_value;
3005         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3006         unsigned int reg = mc->reg;
3007         int min = mc->min;
3008         unsigned int val;
3009
3010         val = (ucontrol->value.integer.value[0]+min) & 0xff;
3011         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3012
3013         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3014 }
3015 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3016
3017 /**
3018  * snd_soc_limit_volume - Set new limit to an existing volume control.
3019  *
3020  * @codec: where to look for the control
3021  * @name: Name of the control
3022  * @max: new maximum limit
3023  *
3024  * Return 0 for success, else error.
3025  */
3026 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3027         const char *name, int max)
3028 {
3029         struct snd_card *card = codec->card->snd_card;
3030         struct snd_kcontrol *kctl;
3031         struct soc_mixer_control *mc;
3032         int found = 0;
3033         int ret = -EINVAL;
3034
3035         /* Sanity check for name and max */
3036         if (unlikely(!name || max <= 0))
3037                 return -EINVAL;
3038
3039         list_for_each_entry(kctl, &card->controls, list) {
3040                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3041                         found = 1;
3042                         break;
3043                 }
3044         }
3045         if (found) {
3046                 mc = (struct soc_mixer_control *)kctl->private_value;
3047                 if (max <= mc->max) {
3048                         mc->platform_max = max;
3049                         ret = 0;
3050                 }
3051         }
3052         return ret;
3053 }
3054 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3055
3056 /**
3057  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
3058  *  mixer info callback
3059  * @kcontrol: mixer control
3060  * @uinfo: control element information
3061  *
3062  * Returns 0 for success.
3063  */
3064 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3065                         struct snd_ctl_elem_info *uinfo)
3066 {
3067         struct soc_mixer_control *mc =
3068                 (struct soc_mixer_control *)kcontrol->private_value;
3069         int max = mc->max;
3070         int min = mc->min;
3071
3072         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3073         uinfo->count = 2;
3074         uinfo->value.integer.min = 0;
3075         uinfo->value.integer.max = max-min;
3076
3077         return 0;
3078 }
3079 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3080
3081 /**
3082  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3083  *  mixer get callback
3084  * @kcontrol: mixer control
3085  * @uinfo: control element information
3086  *
3087  * Returns 0 for success.
3088  */
3089 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3090                         struct snd_ctl_elem_value *ucontrol)
3091 {
3092         struct soc_mixer_control *mc =
3093                 (struct soc_mixer_control *)kcontrol->private_value;
3094         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3095         unsigned int mask = (1<<mc->shift)-1;
3096         int min = mc->min;
3097         int val = snd_soc_read(codec, mc->reg) & mask;
3098         int valr = snd_soc_read(codec, mc->rreg) & mask;
3099
3100         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3101         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3102         return 0;
3103 }
3104 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3105
3106 /**
3107  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3108  *  mixer put callback
3109  * @kcontrol: mixer control
3110  * @uinfo: control element information
3111  *
3112  * Returns 0 for success.
3113  */
3114 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3115                         struct snd_ctl_elem_value *ucontrol)
3116 {
3117         struct soc_mixer_control *mc =
3118                 (struct soc_mixer_control *)kcontrol->private_value;
3119         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3120         unsigned int mask = (1<<mc->shift)-1;
3121         int min = mc->min;
3122         int ret;
3123         unsigned int val, valr, oval, ovalr;
3124
3125         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3126         val &= mask;
3127         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3128         valr &= mask;
3129
3130         oval = snd_soc_read(codec, mc->reg) & mask;
3131         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3132
3133         ret = 0;
3134         if (oval != val) {
3135                 ret = snd_soc_write(codec, mc->reg, val);
3136                 if (ret < 0)
3137                         return ret;
3138         }
3139         if (ovalr != valr) {
3140                 ret = snd_soc_write(codec, mc->rreg, valr);
3141                 if (ret < 0)
3142                         return ret;
3143         }
3144
3145         return 0;
3146 }
3147 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3148
3149 /**
3150  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3151  * @dai: DAI
3152  * @clk_id: DAI specific clock ID
3153  * @freq: new clock frequency in Hz
3154  * @dir: new clock direction - input/output.
3155  *
3156  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3157  */
3158 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3159         unsigned int freq, int dir)
3160 {
3161         if (dai->driver && dai->driver->ops->set_sysclk)
3162                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3163         else if (dai->codec && dai->codec->driver->set_sysclk)
3164                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3165                                                       freq, dir);
3166         else
3167                 return -EINVAL;
3168 }
3169 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3170
3171 /**
3172  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3173  * @codec: CODEC
3174  * @clk_id: DAI specific clock ID
3175  * @freq: new clock frequency in Hz
3176  * @dir: new clock direction - input/output.
3177  *
3178  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3179  */
3180 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3181         unsigned int freq, int dir)
3182 {
3183         if (codec->driver->set_sysclk)
3184                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3185         else
3186                 return -EINVAL;
3187 }
3188 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3189
3190 /**
3191  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3192  * @dai: DAI
3193  * @div_id: DAI specific clock divider ID
3194  * @div: new clock divisor.
3195  *
3196  * Configures the clock dividers. This is used to derive the best DAI bit and
3197  * frame clocks from the system or master clock. It's best to set the DAI bit
3198  * and frame clocks as low as possible to save system power.
3199  */
3200 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3201         int div_id, int div)
3202 {
3203         if (dai->driver && dai->driver->ops->set_clkdiv)
3204                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3205         else
3206                 return -EINVAL;
3207 }
3208 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3209
3210 /**
3211  * snd_soc_dai_set_pll - configure DAI PLL.
3212  * @dai: DAI
3213  * @pll_id: DAI specific PLL ID
3214  * @source: DAI specific source for the PLL
3215  * @freq_in: PLL input clock frequency in Hz
3216  * @freq_out: requested PLL output clock frequency in Hz
3217  *
3218  * Configures and enables PLL to generate output clock based on input clock.
3219  */
3220 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3221         unsigned int freq_in, unsigned int freq_out)
3222 {
3223         if (dai->driver && dai->driver->ops->set_pll)
3224                 return dai->driver->ops->set_pll(dai, pll_id, source,
3225                                          freq_in, freq_out);
3226         else if (dai->codec && dai->codec->driver->set_pll)
3227                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3228                                                    freq_in, freq_out);
3229         else
3230                 return -EINVAL;
3231 }
3232 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3233
3234 /*
3235  * snd_soc_codec_set_pll - configure codec PLL.
3236  * @codec: CODEC
3237  * @pll_id: DAI specific PLL ID
3238  * @source: DAI specific source for the PLL
3239  * @freq_in: PLL input clock frequency in Hz
3240  * @freq_out: requested PLL output clock frequency in Hz
3241  *
3242  * Configures and enables PLL to generate output clock based on input clock.
3243  */
3244 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3245                           unsigned int freq_in, unsigned int freq_out)
3246 {
3247         if (codec->driver->set_pll)
3248                 return codec->driver->set_pll(codec, pll_id, source,
3249                                               freq_in, freq_out);
3250         else
3251                 return -EINVAL;
3252 }
3253 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3254
3255 /**
3256  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3257  * @dai: DAI
3258  * @fmt: SND_SOC_DAIFMT_ format value.
3259  *
3260  * Configures the DAI hardware format and clocking.
3261  */
3262 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3263 {
3264         if (dai->driver && dai->driver->ops->set_fmt)
3265                 return dai->driver->ops->set_fmt(dai, fmt);
3266         else
3267                 return -EINVAL;
3268 }
3269 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3270
3271 /**
3272  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3273  * @dai: DAI
3274  * @tx_mask: bitmask representing active TX slots.
3275  * @rx_mask: bitmask representing active RX slots.
3276  * @slots: Number of slots in use.
3277  * @slot_width: Width in bits for each slot.
3278  *
3279  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3280  * specific.
3281  */
3282 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3283         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3284 {
3285         if (dai->driver && dai->driver->ops->set_tdm_slot)
3286                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3287                                 slots, slot_width);
3288         else
3289                 return -EINVAL;
3290 }
3291 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3292
3293 /**
3294  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3295  * @dai: DAI
3296  * @tx_num: how many TX channels
3297  * @tx_slot: pointer to an array which imply the TX slot number channel
3298  *           0~num-1 uses
3299  * @rx_num: how many RX channels
3300  * @rx_slot: pointer to an array which imply the RX slot number channel
3301  *           0~num-1 uses
3302  *
3303  * configure the relationship between channel number and TDM slot number.
3304  */
3305 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3306         unsigned int tx_num, unsigned int *tx_slot,
3307         unsigned int rx_num, unsigned int *rx_slot)
3308 {
3309         if (dai->driver && dai->driver->ops->set_channel_map)
3310                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3311                         rx_num, rx_slot);
3312         else
3313                 return -EINVAL;
3314 }
3315 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3316
3317 /**
3318  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3319  * @dai: DAI
3320  * @tristate: tristate enable
3321  *
3322  * Tristates the DAI so that others can use it.
3323  */
3324 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3325 {
3326         if (dai->driver && dai->driver->ops->set_tristate)
3327                 return dai->driver->ops->set_tristate(dai, tristate);
3328         else
3329                 return -EINVAL;
3330 }
3331 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3332
3333 /**
3334  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3335  * @dai: DAI
3336  * @mute: mute enable
3337  *
3338  * Mutes the DAI DAC.
3339  */
3340 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3341 {
3342         if (dai->driver && dai->driver->ops->digital_mute)
3343                 return dai->driver->ops->digital_mute(dai, mute);
3344         else
3345                 return -EINVAL;
3346 }
3347 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3348
3349 /**
3350  * snd_soc_register_card - Register a card with the ASoC core
3351  *
3352  * @card: Card to register
3353  *
3354  */
3355 int snd_soc_register_card(struct snd_soc_card *card)
3356 {
3357         int i;
3358
3359         if (!card->name || !card->dev)
3360                 return -EINVAL;
3361
3362         snd_soc_initialize_card_lists(card);
3363
3364         soc_init_card_debugfs(card);
3365
3366         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3367                             (card->num_links + card->num_aux_devs),
3368                             GFP_KERNEL);
3369         if (card->rtd == NULL)
3370                 return -ENOMEM;
3371         card->rtd_aux = &card->rtd[card->num_links];
3372
3373         for (i = 0; i < card->num_links; i++)
3374                 card->rtd[i].dai_link = &card->dai_link[i];
3375
3376         INIT_LIST_HEAD(&card->list);
3377         card->instantiated = 0;
3378         mutex_init(&card->mutex);
3379
3380         mutex_lock(&client_mutex);
3381         list_add(&card->list, &card_list);
3382         snd_soc_instantiate_cards();
3383         mutex_unlock(&client_mutex);
3384
3385         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3386
3387         return 0;
3388 }
3389 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3390
3391 /**
3392  * snd_soc_unregister_card - Unregister a card with the ASoC core
3393  *
3394  * @card: Card to unregister
3395  *
3396  */
3397 int snd_soc_unregister_card(struct snd_soc_card *card)
3398 {
3399         if (card->instantiated)
3400                 soc_cleanup_card_resources(card);
3401         mutex_lock(&client_mutex);
3402         list_del(&card->list);
3403         mutex_unlock(&client_mutex);
3404         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3405
3406         return 0;
3407 }
3408 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3409
3410 /*
3411  * Simplify DAI link configuration by removing ".-1" from device names
3412  * and sanitizing names.
3413  */
3414 static char *fmt_single_name(struct device *dev, int *id)
3415 {
3416         char *found, name[NAME_SIZE];
3417         int id1, id2;
3418
3419         if (dev_name(dev) == NULL)
3420                 return NULL;
3421
3422         strlcpy(name, dev_name(dev), NAME_SIZE);
3423
3424         /* are we a "%s.%d" name (platform and SPI components) */
3425         found = strstr(name, dev->driver->name);
3426         if (found) {
3427                 /* get ID */
3428                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3429
3430                         /* discard ID from name if ID == -1 */
3431                         if (*id == -1)
3432                                 found[strlen(dev->driver->name)] = '\0';
3433                 }
3434
3435         } else {
3436                 /* I2C component devices are named "bus-addr"  */
3437                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3438                         char tmp[NAME_SIZE];
3439
3440                         /* create unique ID number from I2C addr and bus */
3441                         *id = ((id1 & 0xffff) << 16) + id2;
3442
3443                         /* sanitize component name for DAI link creation */
3444                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3445                         strlcpy(name, tmp, NAME_SIZE);
3446                 } else
3447                         *id = 0;
3448         }
3449
3450         return kstrdup(name, GFP_KERNEL);
3451 }
3452
3453 /*
3454  * Simplify DAI link naming for single devices with multiple DAIs by removing
3455  * any ".-1" and using the DAI name (instead of device name).
3456  */
3457 static inline char *fmt_multiple_name(struct device *dev,
3458                 struct snd_soc_dai_driver *dai_drv)
3459 {
3460         if (dai_drv->name == NULL) {
3461                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3462                                 dev_name(dev));
3463                 return NULL;
3464         }
3465
3466         return kstrdup(dai_drv->name, GFP_KERNEL);
3467 }
3468
3469 /**
3470  * snd_soc_register_dai - Register a DAI with the ASoC core
3471  *
3472  * @dai: DAI to register
3473  */
3474 int snd_soc_register_dai(struct device *dev,
3475                 struct snd_soc_dai_driver *dai_drv)
3476 {
3477         struct snd_soc_dai *dai;
3478
3479         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3480
3481         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3482         if (dai == NULL)
3483                 return -ENOMEM;
3484
3485         /* create DAI component name */
3486         dai->name = fmt_single_name(dev, &dai->id);
3487         if (dai->name == NULL) {
3488                 kfree(dai);
3489                 return -ENOMEM;
3490         }
3491
3492         dai->dev = dev;
3493         dai->driver = dai_drv;
3494         if (!dai->driver->ops)
3495                 dai->driver->ops = &null_dai_ops;
3496
3497         mutex_lock(&client_mutex);
3498         list_add(&dai->list, &dai_list);
3499         snd_soc_instantiate_cards();
3500         mutex_unlock(&client_mutex);
3501
3502         pr_debug("Registered DAI '%s'\n", dai->name);
3503
3504         return 0;
3505 }
3506 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3507
3508 /**
3509  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3510  *
3511  * @dai: DAI to unregister
3512  */
3513 void snd_soc_unregister_dai(struct device *dev)
3514 {
3515         struct snd_soc_dai *dai;
3516
3517         list_for_each_entry(dai, &dai_list, list) {
3518                 if (dev == dai->dev)
3519                         goto found;
3520         }
3521         return;
3522
3523 found:
3524         mutex_lock(&client_mutex);
3525         list_del(&dai->list);
3526         mutex_unlock(&client_mutex);
3527
3528         pr_debug("Unregistered DAI '%s'\n", dai->name);
3529         kfree(dai->name);
3530         kfree(dai);
3531 }
3532 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3533
3534 /**
3535  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3536  *
3537  * @dai: Array of DAIs to register
3538  * @count: Number of DAIs
3539  */
3540 int snd_soc_register_dais(struct device *dev,
3541                 struct snd_soc_dai_driver *dai_drv, size_t count)
3542 {
3543         struct snd_soc_dai *dai;
3544         int i, ret = 0;
3545
3546         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3547
3548         for (i = 0; i < count; i++) {
3549
3550                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3551                 if (dai == NULL) {
3552                         ret = -ENOMEM;
3553                         goto err;
3554                 }
3555
3556                 /* create DAI component name */
3557                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3558                 if (dai->name == NULL) {
3559                         kfree(dai);
3560                         ret = -EINVAL;
3561                         goto err;
3562                 }
3563
3564                 dai->dev = dev;
3565                 dai->driver = &dai_drv[i];
3566                 if (dai->driver->id)
3567                         dai->id = dai->driver->id;
3568                 else
3569                         dai->id = i;
3570                 if (!dai->driver->ops)
3571                         dai->driver->ops = &null_dai_ops;
3572
3573                 mutex_lock(&client_mutex);
3574                 list_add(&dai->list, &dai_list);
3575                 mutex_unlock(&client_mutex);
3576
3577                 pr_debug("Registered DAI '%s'\n", dai->name);
3578         }
3579
3580         mutex_lock(&client_mutex);
3581         snd_soc_instantiate_cards();
3582         mutex_unlock(&client_mutex);
3583         return 0;
3584
3585 err:
3586         for (i--; i >= 0; i--)
3587                 snd_soc_unregister_dai(dev);
3588
3589         return ret;
3590 }
3591 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3592
3593 /**
3594  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3595  *
3596  * @dai: Array of DAIs to unregister
3597  * @count: Number of DAIs
3598  */
3599 void snd_soc_unregister_dais(struct device *dev, size_t count)
3600 {
3601         int i;
3602
3603         for (i = 0; i < count; i++)
3604                 snd_soc_unregister_dai(dev);
3605 }
3606 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3607
3608 /**
3609  * snd_soc_register_platform - Register a platform with the ASoC core
3610  *
3611  * @platform: platform to register
3612  */
3613 int snd_soc_register_platform(struct device *dev,
3614                 struct snd_soc_platform_driver *platform_drv)
3615 {
3616         struct snd_soc_platform *platform;
3617
3618         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3619
3620         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3621         if (platform == NULL)
3622                 return -ENOMEM;
3623
3624         /* create platform component name */
3625         platform->name = fmt_single_name(dev, &platform->id);
3626         if (platform->name == NULL) {
3627                 kfree(platform);
3628                 return -ENOMEM;
3629         }
3630
3631         platform->dev = dev;
3632         platform->driver = platform_drv;
3633
3634         mutex_lock(&client_mutex);
3635         list_add(&platform->list, &platform_list);
3636         snd_soc_instantiate_cards();
3637         mutex_unlock(&client_mutex);
3638
3639         pr_debug("Registered platform '%s'\n", platform->name);
3640
3641         return 0;
3642 }
3643 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3644
3645 /**
3646  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3647  *
3648  * @platform: platform to unregister
3649  */
3650 void snd_soc_unregister_platform(struct device *dev)
3651 {
3652         struct snd_soc_platform *platform;
3653
3654         list_for_each_entry(platform, &platform_list, list) {
3655                 if (dev == platform->dev)
3656                         goto found;
3657         }
3658         return;
3659
3660 found:
3661         mutex_lock(&client_mutex);
3662         list_del(&platform->list);
3663         mutex_unlock(&client_mutex);
3664
3665         pr_debug("Unregistered platform '%s'\n", platform->name);
3666         kfree(platform->name);
3667         kfree(platform);
3668 }
3669 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3670
3671 static u64 codec_format_map[] = {
3672         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3673         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3674         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3675         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3676         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3677         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3678         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3679         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3680         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3681         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3682         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3683         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3684         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3685         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3686         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3687         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3688 };
3689
3690 /* Fix up the DAI formats for endianness: codecs don't actually see
3691  * the endianness of the data but we're using the CPU format
3692  * definitions which do need to include endianness so we ensure that
3693  * codec DAIs always have both big and little endian variants set.
3694  */
3695 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3696 {
3697         int i;
3698
3699         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3700                 if (stream->formats & codec_format_map[i])
3701                         stream->formats |= codec_format_map[i];
3702 }
3703
3704 /**
3705  * snd_soc_register_codec - Register a codec with the ASoC core
3706  *
3707  * @codec: codec to register
3708  */
3709 int snd_soc_register_codec(struct device *dev,
3710                            const struct snd_soc_codec_driver *codec_drv,
3711                            struct snd_soc_dai_driver *dai_drv,
3712                            int num_dai)
3713 {
3714         size_t reg_size;
3715         struct snd_soc_codec *codec;
3716         int ret, i;
3717
3718         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3719
3720         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3721         if (codec == NULL)
3722                 return -ENOMEM;
3723
3724         /* create CODEC component name */
3725         codec->name = fmt_single_name(dev, &codec->id);
3726         if (codec->name == NULL) {
3727                 kfree(codec);
3728                 return -ENOMEM;
3729         }
3730
3731         if (codec_drv->compress_type)
3732                 codec->compress_type = codec_drv->compress_type;
3733         else
3734                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3735
3736         codec->write = codec_drv->write;
3737         codec->read = codec_drv->read;
3738         codec->volatile_register = codec_drv->volatile_register;
3739         codec->readable_register = codec_drv->readable_register;
3740         codec->writable_register = codec_drv->writable_register;
3741         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3742         codec->dapm.dev = dev;
3743         codec->dapm.codec = codec;
3744         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3745         codec->dev = dev;
3746         codec->driver = codec_drv;
3747         codec->num_dai = num_dai;
3748         mutex_init(&codec->mutex);
3749
3750         /* allocate CODEC register cache */
3751         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3752                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3753                 codec->reg_size = reg_size;
3754                 /* it is necessary to make a copy of the default register cache
3755                  * because in the case of using a compression type that requires
3756                  * the default register cache to be marked as __devinitconst the
3757                  * kernel might have freed the array by the time we initialize
3758                  * the cache.
3759                  */
3760                 if (codec_drv->reg_cache_default) {
3761                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3762                                                       reg_size, GFP_KERNEL);
3763                         if (!codec->reg_def_copy) {
3764                                 ret = -ENOMEM;
3765                                 goto fail;
3766                         }
3767                 }
3768         }
3769
3770         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3771                 if (!codec->volatile_register)
3772                         codec->volatile_register = snd_soc_default_volatile_register;
3773                 if (!codec->readable_register)
3774                         codec->readable_register = snd_soc_default_readable_register;
3775                 if (!codec->writable_register)
3776                         codec->writable_register = snd_soc_default_writable_register;
3777         }
3778
3779         for (i = 0; i < num_dai; i++) {
3780                 fixup_codec_formats(&dai_drv[i].playback);
3781                 fixup_codec_formats(&dai_drv[i].capture);
3782         }
3783
3784         /* register any DAIs */
3785         if (num_dai) {
3786                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3787                 if (ret < 0)
3788                         goto fail;
3789         }
3790
3791         mutex_lock(&client_mutex);
3792         list_add(&codec->list, &codec_list);
3793         snd_soc_instantiate_cards();
3794         mutex_unlock(&client_mutex);
3795
3796         pr_debug("Registered codec '%s'\n", codec->name);
3797         return 0;
3798
3799 fail:
3800         kfree(codec->reg_def_copy);
3801         codec->reg_def_copy = NULL;
3802         kfree(codec->name);
3803         kfree(codec);
3804         return ret;
3805 }
3806 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3807
3808 /**
3809  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3810  *
3811  * @codec: codec to unregister
3812  */
3813 void snd_soc_unregister_codec(struct device *dev)
3814 {
3815         struct snd_soc_codec *codec;
3816         int i;
3817
3818         list_for_each_entry(codec, &codec_list, list) {
3819                 if (dev == codec->dev)
3820                         goto found;
3821         }
3822         return;
3823
3824 found:
3825         if (codec->num_dai)
3826                 for (i = 0; i < codec->num_dai; i++)
3827                         snd_soc_unregister_dai(dev);
3828
3829         mutex_lock(&client_mutex);
3830         list_del(&codec->list);
3831         mutex_unlock(&client_mutex);
3832
3833         pr_debug("Unregistered codec '%s'\n", codec->name);
3834
3835         snd_soc_cache_exit(codec);
3836         kfree(codec->reg_def_copy);
3837         kfree(codec->name);
3838         kfree(codec);
3839 }
3840 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3841
3842 static int __init snd_soc_init(void)
3843 {
3844 #ifdef CONFIG_DEBUG_FS
3845         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3846         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3847                 printk(KERN_WARNING
3848                        "ASoC: Failed to create debugfs directory\n");
3849                 snd_soc_debugfs_root = NULL;
3850         }
3851
3852         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3853                                  &codec_list_fops))
3854                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3855
3856         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3857                                  &dai_list_fops))
3858                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3859
3860         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3861                                  &platform_list_fops))
3862                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3863 #endif
3864
3865         return platform_driver_register(&soc_driver);
3866 }
3867 module_init(snd_soc_init);
3868
3869 static void __exit snd_soc_exit(void)
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");