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