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         size_t buf_size;
 246         char *start = buf;
 247         unsigned long reg, value;
 248         int step = 1;
 249         struct snd_soc_codec *codec = file->private_data;
 250
 251         buf_size = min(count, (sizeof(buf)-1));
 252         if (copy_from_user(buf, user_buf, buf_size))
 253                 return -EFAULT;
 254         buf[buf_size] = 0;
 255
 256         if (codec->driver->reg_cache_step)
 257                 step = codec->driver->reg_cache_step;
 258
 259         while (*start == ' ')
 260                 start++;
 261         reg = simple_strtoul(start, &start, 16);
 262         while (*start == ' ')
 263                 start++;
 264         if (strict_strtoul(start, 16, &value))
 265                 return -EINVAL;
 266
 267         /* Userspace has been fiddling around behind the kernel's back */
 268         add_taint(TAINT_USER);
 269
 270         snd_soc_write(codec, reg, value);
 271         return buf_size;
 272 }
 273
 274 static const struct file_operations codec_reg_fops = {
 275         .open = codec_reg_open_file,
 276         .read = codec_reg_read_file,
 277         .write = codec_reg_write_file,
 278         .llseek = default_llseek,
 279 };
 280
 281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 282 {
 283         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 284
 285         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 286                                                        debugfs_card_root);
 287         if (!codec->debugfs_codec_root) {
 288                 printk(KERN_WARNING
 289                        "ASoC: Failed to create codec debugfs directory\n");
 290                 return;
 291         }
 292
 293         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
 294                             &codec->cache_sync);
 295         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
 296                             &codec->cache_only);
 297
 298         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 299                                                  codec->debugfs_codec_root,
 300                                                  codec, &codec_reg_fops);
 301         if (!codec->debugfs_reg)
 302                 printk(KERN_WARNING
 303                        "ASoC: Failed to create codec register debugfs file\n");
 304
 305         snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
 306 }
 307
 308 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 309 {
 310         debugfs_remove_recursive(codec->debugfs_codec_root);
 311 }
 312
 313 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 314                                     size_t count, loff_t *ppos)
 315 {
 316         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 317         ssize_t len, ret = 0;
 318         struct snd_soc_codec *codec;
 319
 320         if (!buf)
 321                 return -ENOMEM;
 322
 323         list_for_each_entry(codec, &codec_list, list) {
 324                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 325                                codec->name);
 326                 if (len >= 0)
 327                         ret += len;
 328                 if (ret > PAGE_SIZE) {
 329                         ret = PAGE_SIZE;
 330                         break;
 331                 }
 332         }
 333
 334         if (ret >= 0)
 335                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 336
 337         kfree(buf);
 338
 339         return ret;
 340 }
 341
 342 static const struct file_operations codec_list_fops = {
 343         .read = codec_list_read_file,
 344         .llseek = default_llseek,/* read accesses f_pos */
 345 };
 346
 347 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 348                                   size_t count, loff_t *ppos)
 349 {
 350         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 351         ssize_t len, ret = 0;
 352         struct snd_soc_dai *dai;
 353
 354         if (!buf)
 355                 return -ENOMEM;
 356
 357         list_for_each_entry(dai, &dai_list, list) {
 358                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 359                 if (len >= 0)
 360                         ret += len;
 361                 if (ret > PAGE_SIZE) {
 362                         ret = PAGE_SIZE;
 363                         break;
 364                 }
 365         }
 366
 367         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 368
 369         kfree(buf);
 370
 371         return ret;
 372 }
 373
 374 static const struct file_operations dai_list_fops = {
 375         .read = dai_list_read_file,
 376         .llseek = default_llseek,/* read accesses f_pos */
 377 };
 378
 379 static ssize_t platform_list_read_file(struct file *file,
 380                                        char __user *user_buf,
 381                                        size_t count, loff_t *ppos)
 382 {
 383         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 384         ssize_t len, ret = 0;
 385         struct snd_soc_platform *platform;
 386
 387         if (!buf)
 388                 return -ENOMEM;
 389
 390         list_for_each_entry(platform, &platform_list, list) {
 391                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 392                                platform->name);
 393                 if (len >= 0)
 394                         ret += len;
 395                 if (ret > PAGE_SIZE) {
 396                         ret = PAGE_SIZE;
 397                         break;
 398                 }
 399         }
 400
 401         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 402
 403         kfree(buf);
 404
 405         return ret;
 406 }
 407
 408 static const struct file_operations platform_list_fops = {
 409         .read = platform_list_read_file,
 410         .llseek = default_llseek,/* read accesses f_pos */
 411 };
 412
 413 static void soc_init_card_debugfs(struct snd_soc_card *card)
 414 {
 415         card->debugfs_card_root = debugfs_create_dir(card->name,
 416                                                      snd_soc_debugfs_root);
 417         if (!card->debugfs_card_root) {
 418                 dev_warn(card->dev,
 419                          "ASoC: Failed to create codec debugfs directory\n");
 420                 return;
 421         }
 422
 423         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 424                                                     card->debugfs_card_root,
 425                                                     &card->pop_time);
 426         if (!card->debugfs_pop_time)
 427                 dev_warn(card->dev,
 428                        "Failed to create pop time debugfs file\n");
 429 }
 430
 431 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 432 {
 433         debugfs_remove_recursive(card->debugfs_card_root);
 434 }
 435
 436 #else
 437
 438 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 439 {
 440 }
 441
 442 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 443 {
 444 }
 445
 446 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 447 {
 448 }
 449
 450 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 451 {
 452 }
 453 #endif
 454
 455 #ifdef CONFIG_SND_SOC_AC97_BUS
 456 /* unregister ac97 codec */
 457 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 458 {
 459         if (codec->ac97->dev.bus)
 460                 device_unregister(&codec->ac97->dev);
 461         return 0;
 462 }
 463
 464 /* stop no dev release warning */
 465 static void soc_ac97_device_release(struct device *dev){}
 466
 467 /* register ac97 codec to bus */
 468 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 469 {
 470         int err;
 471
 472         codec->ac97->dev.bus = &ac97_bus_type;
 473         codec->ac97->dev.parent = codec->card->dev;
 474         codec->ac97->dev.release = soc_ac97_device_release;
 475
 476         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 477                      codec->card->snd_card->number, 0, codec->name);
 478         err = device_register(&codec->ac97->dev);
 479         if (err < 0) {
 480                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
 481                 codec->ac97->dev.bus = NULL;
 482                 return err;
 483         }
 484         return 0;
 485 }
 486 #endif
 487
 488 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 489 {
 490         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 491         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 492         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 493         int ret;
 494
 495         if (!codec_dai->driver->symmetric_rates &&
 496             !cpu_dai->driver->symmetric_rates &&
 497             !rtd->dai_link->symmetric_rates)
 498                 return 0;
 499
 500         /* This can happen if multiple streams are starting simultaneously -
 501          * the second can need to get its constraints before the first has
 502          * picked a rate.  Complain and allow the application to carry on.
 503          */
 504         if (!rtd->rate) {
 505                 dev_warn(&rtd->dev,
 506                          "Not enforcing symmetric_rates due to race\n");
 507                 return 0;
 508         }
 509
 510         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
 511
 512         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 513                                            SNDRV_PCM_HW_PARAM_RATE,
 514                                            rtd->rate, rtd->rate);
 515         if (ret < 0) {
 516                 dev_err(&rtd->dev,
 517                         "Unable to apply rate symmetry constraint: %d\n", ret);
 518                 return ret;
 519         }
 520
 521         return 0;
 522 }
 523
 524 /*
 525  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 526  * then initialized and any private data can be allocated. This also calls
 527  * startup for the cpu DAI, platform, machine and codec DAI.
 528  */
 529 static int soc_pcm_open(struct snd_pcm_substream *substream)
 530 {
 531         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 532         struct snd_pcm_runtime *runtime = substream->runtime;
 533         struct snd_soc_platform *platform = rtd->platform;
 534         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 535         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 536         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 537         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 538         int ret = 0;
 539
 540         mutex_lock(&pcm_mutex);
 541
 542         /* startup the audio subsystem */
 543         if (cpu_dai->driver->ops->startup) {
 544                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 545                 if (ret < 0) {
 546                         printk(KERN_ERR "asoc: can't open interface %s\n",
 547                                 cpu_dai->name);
 548                         goto out;
 549                 }
 550         }
 551
 552         if (platform->driver->ops && platform->driver->ops->open) {
 553                 ret = platform->driver->ops->open(substream);
 554                 if (ret < 0) {
 555                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
 556                         goto platform_err;
 557                 }
 558         }
 559
 560         if (codec_dai->driver->ops->startup) {
 561                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 562                 if (ret < 0) {
 563                         printk(KERN_ERR "asoc: can't open codec %s\n",
 564                                 codec_dai->name);
 565                         goto codec_dai_err;
 566                 }
 567         }
 568
 569         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 570                 ret = rtd->dai_link->ops->startup(substream);
 571                 if (ret < 0) {
 572                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
 573                         goto machine_err;
 574                 }
 575         }
 576
 577         /* Check that the codec and cpu DAIs are compatible */
 578         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 579                 runtime->hw.rate_min =
 580                         max(codec_dai_drv->playback.rate_min,
 581                             cpu_dai_drv->playback.rate_min);
 582                 runtime->hw.rate_max =
 583                         min(codec_dai_drv->playback.rate_max,
 584                             cpu_dai_drv->playback.rate_max);
 585                 runtime->hw.channels_min =
 586                         max(codec_dai_drv->playback.channels_min,
 587                                 cpu_dai_drv->playback.channels_min);
 588                 runtime->hw.channels_max =
 589                         min(codec_dai_drv->playback.channels_max,
 590                                 cpu_dai_drv->playback.channels_max);
 591                 runtime->hw.formats =
 592                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 593                 runtime->hw.rates =
 594                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 595                 if (codec_dai_drv->playback.rates
 596                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 597                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 598                 if (cpu_dai_drv->playback.rates
 599                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 600                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 601         } else {
 602                 runtime->hw.rate_min =
 603                         max(codec_dai_drv->capture.rate_min,
 604                             cpu_dai_drv->capture.rate_min);
 605                 runtime->hw.rate_max =
 606                         min(codec_dai_drv->capture.rate_max,
 607                             cpu_dai_drv->capture.rate_max);
 608                 runtime->hw.channels_min =
 609                         max(codec_dai_drv->capture.channels_min,
 610                                 cpu_dai_drv->capture.channels_min);
 611                 runtime->hw.channels_max =
 612                         min(codec_dai_drv->capture.channels_max,
 613                                 cpu_dai_drv->capture.channels_max);
 614                 runtime->hw.formats =
 615                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 616                 runtime->hw.rates =
 617                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 618                 if (codec_dai_drv->capture.rates
 619                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 620                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 621                 if (cpu_dai_drv->capture.rates
 622                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 623                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 624         }
 625
 626         ret = -EINVAL;
 627         snd_pcm_limit_hw_rates(runtime);
 628         if (!runtime->hw.rates) {
 629                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 630                         codec_dai->name, cpu_dai->name);
 631                 goto config_err;
 632         }
 633         if (!runtime->hw.formats) {
 634                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 635                         codec_dai->name, cpu_dai->name);
 636                 goto config_err;
 637         }
 638         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 639             runtime->hw.channels_min > runtime->hw.channels_max) {
 640                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 641                                 codec_dai->name, cpu_dai->name);
 642                 goto config_err;
 643         }
 644
 645         /* Symmetry only applies if we've already got an active stream. */
 646         if (cpu_dai->active || codec_dai->active) {
 647                 ret = soc_pcm_apply_symmetry(substream);
 648                 if (ret != 0)
 649                         goto config_err;
 650         }
 651
 652         pr_debug("asoc: %s <-> %s info:\n",
 653                         codec_dai->name, cpu_dai->name);
 654         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 655         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 656                  runtime->hw.channels_max);
 657         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 658                  runtime->hw.rate_max);
 659
 660         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 661                 cpu_dai->playback_active++;
 662                 codec_dai->playback_active++;
 663         } else {
 664                 cpu_dai->capture_active++;
 665                 codec_dai->capture_active++;
 666         }
 667         cpu_dai->active++;
 668         codec_dai->active++;
 669         rtd->codec->active++;
 670         mutex_unlock(&pcm_mutex);
 671         return 0;
 672
 673 config_err:
 674         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 675                 rtd->dai_link->ops->shutdown(substream);
 676
 677 machine_err:
 678         if (codec_dai->driver->ops->shutdown)
 679                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 680
 681 codec_dai_err:
 682         if (platform->driver->ops && platform->driver->ops->close)
 683                 platform->driver->ops->close(substream);
 684
 685 platform_err:
 686         if (cpu_dai->driver->ops->shutdown)
 687                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 688 out:
 689         mutex_unlock(&pcm_mutex);
 690         return ret;
 691 }
 692
 693 /*
 694  * Power down the audio subsystem pmdown_time msecs after close is called.
 695  * This is to ensure there are no pops or clicks in between any music tracks
 696  * due to DAPM power cycling.
 697  */
 698 static void close_delayed_work(struct work_struct *work)
 699 {
 700         struct snd_soc_pcm_runtime *rtd =
 701                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 702         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 703
 704         mutex_lock(&pcm_mutex);
 705
 706         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 707                  codec_dai->driver->playback.stream_name,
 708                  codec_dai->playback_active ? "active" : "inactive",
 709                  codec_dai->pop_wait ? "yes" : "no");
 710
 711         /* are we waiting on this codec DAI stream */
 712         if (codec_dai->pop_wait == 1) {
 713                 codec_dai->pop_wait = 0;
 714                 snd_soc_dapm_stream_event(rtd,
 715                         codec_dai->driver->playback.stream_name,
 716                         SND_SOC_DAPM_STREAM_STOP);
 717         }
 718
 719         mutex_unlock(&pcm_mutex);
 720 }
 721
 722 /*
 723  * Called by ALSA when a PCM substream is closed. Private data can be
 724  * freed here. The cpu DAI, codec DAI, machine and platform are also
 725  * shutdown.
 726  */
 727 static int soc_codec_close(struct snd_pcm_substream *substream)
 728 {
 729         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 730         struct snd_soc_platform *platform = rtd->platform;
 731         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 732         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 733         struct snd_soc_codec *codec = rtd->codec;
 734
 735         mutex_lock(&pcm_mutex);
 736
 737         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 738                 cpu_dai->playback_active--;
 739                 codec_dai->playback_active--;
 740         } else {
 741                 cpu_dai->capture_active--;
 742                 codec_dai->capture_active--;
 743         }
 744
 745         cpu_dai->active--;
 746         codec_dai->active--;
 747         codec->active--;
 748
 749         /* Muting the DAC suppresses artifacts caused during digital
 750          * shutdown, for example from stopping clocks.
 751          */
 752         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 753                 snd_soc_dai_digital_mute(codec_dai, 1);
 754
 755         if (cpu_dai->driver->ops->shutdown)
 756                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 757
 758         if (codec_dai->driver->ops->shutdown)
 759                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 760
 761         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 762                 rtd->dai_link->ops->shutdown(substream);
 763
 764         if (platform->driver->ops && platform->driver->ops->close)
 765                 platform->driver->ops->close(substream);
 766         cpu_dai->runtime = NULL;
 767
 768         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 769                 /* start delayed pop wq here for playback streams */
 770                 codec_dai->pop_wait = 1;
 771                 schedule_delayed_work(&rtd->delayed_work,
 772                         msecs_to_jiffies(rtd->pmdown_time));
 773         } else {
 774                 /* capture streams can be powered down now */
 775                 snd_soc_dapm_stream_event(rtd,
 776                         codec_dai->driver->capture.stream_name,
 777                         SND_SOC_DAPM_STREAM_STOP);
 778         }
 779
 780         mutex_unlock(&pcm_mutex);
 781         return 0;
 782 }
 783
 784 /*
 785  * Called by ALSA when the PCM substream is prepared, can set format, sample
 786  * rate, etc.  This function is non atomic and can be called multiple times,
 787  * it can refer to the runtime info.
 788  */
 789 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 790 {
 791         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 792         struct snd_soc_platform *platform = rtd->platform;
 793         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 794         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 795         int ret = 0;
 796
 797         mutex_lock(&pcm_mutex);
 798
 799         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 800                 ret = rtd->dai_link->ops->prepare(substream);
 801                 if (ret < 0) {
 802                         printk(KERN_ERR "asoc: machine prepare error\n");
 803                         goto out;
 804                 }
 805         }
 806
 807         if (platform->driver->ops && platform->driver->ops->prepare) {
 808                 ret = platform->driver->ops->prepare(substream);
 809                 if (ret < 0) {
 810                         printk(KERN_ERR "asoc: platform prepare error\n");
 811                         goto out;
 812                 }
 813         }
 814
 815         if (codec_dai->driver->ops->prepare) {
 816                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 817                 if (ret < 0) {
 818                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
 819                         goto out;
 820                 }
 821         }
 822
 823         if (cpu_dai->driver->ops->prepare) {
 824                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 825                 if (ret < 0) {
 826                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
 827                         goto out;
 828                 }
 829         }
 830
 831         /* cancel any delayed stream shutdown that is pending */
 832         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 833             codec_dai->pop_wait) {
 834                 codec_dai->pop_wait = 0;
 835                 cancel_delayed_work(&rtd->delayed_work);
 836         }
 837
 838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 839                 snd_soc_dapm_stream_event(rtd,
 840                                           codec_dai->driver->playback.stream_name,
 841                                           SND_SOC_DAPM_STREAM_START);
 842         else
 843                 snd_soc_dapm_stream_event(rtd,
 844                                           codec_dai->driver->capture.stream_name,
 845                                           SND_SOC_DAPM_STREAM_START);
 846
 847         snd_soc_dai_digital_mute(codec_dai, 0);
 848
 849 out:
 850         mutex_unlock(&pcm_mutex);
 851         return ret;
 852 }
 853
 854 /*
 855  * Called by ALSA when the hardware params are set by application. This
 856  * function can also be called multiple times and can allocate buffers
 857  * (using snd_pcm_lib_* ). It's non-atomic.
 858  */
 859 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 860                                 struct snd_pcm_hw_params *params)
 861 {
 862         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 863         struct snd_soc_platform *platform = rtd->platform;
 864         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 865         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 866         int ret = 0;
 867
 868         mutex_lock(&pcm_mutex);
 869
 870         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 871                 ret = rtd->dai_link->ops->hw_params(substream, params);
 872                 if (ret < 0) {
 873                         printk(KERN_ERR "asoc: machine hw_params failed\n");
 874                         goto out;
 875                 }
 876         }
 877
 878         if (codec_dai->driver->ops->hw_params) {
 879                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 880                 if (ret < 0) {
 881                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
 882                                 codec_dai->name);
 883                         goto codec_err;
 884                 }
 885         }
 886
 887         if (cpu_dai->driver->ops->hw_params) {
 888                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 889                 if (ret < 0) {
 890                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
 891                                 cpu_dai->name);
 892                         goto interface_err;
 893                 }
 894         }
 895
 896         if (platform->driver->ops && platform->driver->ops->hw_params) {
 897                 ret = platform->driver->ops->hw_params(substream, params);
 898                 if (ret < 0) {
 899                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
 900                                 platform->name);
 901                         goto platform_err;
 902                 }
 903         }
 904
 905         rtd->rate = params_rate(params);
 906
 907 out:
 908         mutex_unlock(&pcm_mutex);
 909         return ret;
 910
 911 platform_err:
 912         if (cpu_dai->driver->ops->hw_free)
 913                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 914
 915 interface_err:
 916         if (codec_dai->driver->ops->hw_free)
 917                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 918
 919 codec_err:
 920         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 921                 rtd->dai_link->ops->hw_free(substream);
 922
 923         mutex_unlock(&pcm_mutex);
 924         return ret;
 925 }
 926
 927 /*
 928  * Frees resources allocated by hw_params, can be called multiple times
 929  */
 930 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 931 {
 932         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 933         struct snd_soc_platform *platform = rtd->platform;
 934         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 935         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 936         struct snd_soc_codec *codec = rtd->codec;
 937
 938         mutex_lock(&pcm_mutex);
 939
 940         /* apply codec digital mute */
 941         if (!codec->active)
 942                 snd_soc_dai_digital_mute(codec_dai, 1);
 943
 944         /* free any machine hw params */
 945         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 946                 rtd->dai_link->ops->hw_free(substream);
 947
 948         /* free any DMA resources */
 949         if (platform->driver->ops && platform->driver->ops->hw_free)
 950                 platform->driver->ops->hw_free(substream);
 951
 952         /* now free hw params for the DAIs  */
 953         if (codec_dai->driver->ops->hw_free)
 954                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 955
 956         if (cpu_dai->driver->ops->hw_free)
 957                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 958
 959         mutex_unlock(&pcm_mutex);
 960         return 0;
 961 }
 962
 963 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 964 {
 965         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 966         struct snd_soc_platform *platform = rtd->platform;
 967         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 968         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 969         int ret;
 970
 971         if (codec_dai->driver->ops->trigger) {
 972                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 973                 if (ret < 0)
 974                         return ret;
 975         }
 976
 977         if (platform->driver->ops && platform->driver->ops->trigger) {
 978                 ret = platform->driver->ops->trigger(substream, cmd);
 979                 if (ret < 0)
 980                         return ret;
 981         }
 982
 983         if (cpu_dai->driver->ops->trigger) {
 984                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 985                 if (ret < 0)
 986                         return ret;
 987         }
 988         return 0;
 989 }
 990
 991 /*
 992  * soc level wrapper for pointer callback
 993  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 994  * the runtime->delay will be updated accordingly.
 995  */
 996 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 997 {
 998         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 999         struct snd_soc_platform *platform = rtd->platform;
1000         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1002         struct snd_pcm_runtime *runtime = substream->runtime;
1003         snd_pcm_uframes_t offset = 0;
1004         snd_pcm_sframes_t delay = 0;
1005
1006         if (platform->driver->ops && platform->driver->ops->pointer)
1007                 offset = platform->driver->ops->pointer(substream);
1008
1009         if (cpu_dai->driver->ops->delay)
1010                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1011
1012         if (codec_dai->driver->ops->delay)
1013                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1014
1015         if (platform->driver->delay)
1016                 delay += platform->driver->delay(substream, codec_dai);
1017
1018         runtime->delay = delay;
1019
1020         return offset;
1021 }
1022
1023 /* ASoC PCM operations */
1024 static struct snd_pcm_ops soc_pcm_ops = {
1025         .open           = soc_pcm_open,
1026         .close          = soc_codec_close,
1027         .hw_params      = soc_pcm_hw_params,
1028         .hw_free        = soc_pcm_hw_free,
1029         .prepare        = soc_pcm_prepare,
1030         .trigger        = soc_pcm_trigger,
1031         .pointer        = soc_pcm_pointer,
1032 };
1033
1034 #ifdef CONFIG_PM_SLEEP
1035 /* powers down audio subsystem for suspend */
1036 int snd_soc_suspend(struct device *dev)
1037 {
1038         struct snd_soc_card *card = dev_get_drvdata(dev);
1039         struct snd_soc_codec *codec;
1040         int i;
1041
1042         /* If the initialization of this soc device failed, there is no codec
1043          * associated with it. Just bail out in this case.
1044          */
1045         if (list_empty(&card->codec_dev_list))
1046                 return 0;
1047
1048         /* Due to the resume being scheduled into a workqueue we could
1049         * suspend before that's finished - wait for it to complete.
1050          */
1051         snd_power_lock(card->snd_card);
1052         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1053         snd_power_unlock(card->snd_card);
1054
1055         /* we're going to block userspace touching us until resume completes */
1056         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1057
1058         /* mute any active DACs */
1059         for (i = 0; i < card->num_rtd; i++) {
1060                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1061                 struct snd_soc_dai_driver *drv = dai->driver;
1062
1063                 if (card->rtd[i].dai_link->ignore_suspend)
1064                         continue;
1065
1066                 if (drv->ops->digital_mute && dai->playback_active)
1067                         drv->ops->digital_mute(dai, 1);
1068         }
1069
1070         /* suspend all pcms */
1071         for (i = 0; i < card->num_rtd; i++) {
1072                 if (card->rtd[i].dai_link->ignore_suspend)
1073                         continue;
1074
1075                 snd_pcm_suspend_all(card->rtd[i].pcm);
1076         }
1077
1078         if (card->suspend_pre)
1079                 card->suspend_pre(card);
1080
1081         for (i = 0; i < card->num_rtd; i++) {
1082                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1083                 struct snd_soc_platform *platform = card->rtd[i].platform;
1084
1085                 if (card->rtd[i].dai_link->ignore_suspend)
1086                         continue;
1087
1088                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1089                         cpu_dai->driver->suspend(cpu_dai);
1090                 if (platform->driver->suspend && !platform->suspended) {
1091                         platform->driver->suspend(cpu_dai);
1092                         platform->suspended = 1;
1093                 }
1094         }
1095
1096         /* close any waiting streams and save state */
1097         for (i = 0; i < card->num_rtd; i++) {
1098                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1099                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1100         }
1101
1102         for (i = 0; i < card->num_rtd; i++) {
1103                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1104
1105                 if (card->rtd[i].dai_link->ignore_suspend)
1106                         continue;
1107
1108                 if (driver->playback.stream_name != NULL)
1109                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1110                                 SND_SOC_DAPM_STREAM_SUSPEND);
1111
1112                 if (driver->capture.stream_name != NULL)
1113                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1114                                 SND_SOC_DAPM_STREAM_SUSPEND);
1115         }
1116
1117         /* suspend all CODECs */
1118         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1119                 /* If there are paths active then the CODEC will be held with
1120                  * bias _ON and should not be suspended. */
1121                 if (!codec->suspended && codec->driver->suspend) {
1122                         switch (codec->dapm.bias_level) {
1123                         case SND_SOC_BIAS_STANDBY:
1124                         case SND_SOC_BIAS_OFF:
1125                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1126                                 codec->suspended = 1;
1127                                 break;
1128                         default:
1129                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1130                                 break;
1131                         }
1132                 }
1133         }
1134
1135         for (i = 0; i < card->num_rtd; i++) {
1136                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1137
1138                 if (card->rtd[i].dai_link->ignore_suspend)
1139                         continue;
1140
1141                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1142                         cpu_dai->driver->suspend(cpu_dai);
1143         }
1144
1145         if (card->suspend_post)
1146                 card->suspend_post(card);
1147
1148         return 0;
1149 }
1150 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1151
1152 /* deferred resume work, so resume can complete before we finished
1153  * setting our codec back up, which can be very slow on I2C
1154  */
1155 static void soc_resume_deferred(struct work_struct *work)
1156 {
1157         struct snd_soc_card *card =
1158                         container_of(work, struct snd_soc_card, deferred_resume_work);
1159         struct snd_soc_codec *codec;
1160         int i;
1161
1162         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1163          * so userspace apps are blocked from touching us
1164          */
1165
1166         dev_dbg(card->dev, "starting resume work\n");
1167
1168         /* Bring us up into D2 so that DAPM starts enabling things */
1169         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1170
1171         if (card->resume_pre)
1172                 card->resume_pre(card);
1173
1174         /* resume AC97 DAIs */
1175         for (i = 0; i < card->num_rtd; i++) {
1176                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1177
1178                 if (card->rtd[i].dai_link->ignore_suspend)
1179                         continue;
1180
1181                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1182                         cpu_dai->driver->resume(cpu_dai);
1183         }
1184
1185         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1186                 /* If the CODEC was idle over suspend then it will have been
1187                  * left with bias OFF or STANDBY and suspended so we must now
1188                  * resume.  Otherwise the suspend was suppressed.
1189                  */
1190                 if (codec->driver->resume && codec->suspended) {
1191                         switch (codec->dapm.bias_level) {
1192                         case SND_SOC_BIAS_STANDBY:
1193                         case SND_SOC_BIAS_OFF:
1194                                 codec->driver->resume(codec);
1195                                 codec->suspended = 0;
1196                                 break;
1197                         default:
1198                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1199                                 break;
1200                         }
1201                 }
1202         }
1203
1204         for (i = 0; i < card->num_rtd; i++) {
1205                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1206
1207                 if (card->rtd[i].dai_link->ignore_suspend)
1208                         continue;
1209
1210                 if (driver->playback.stream_name != NULL)
1211                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1212                                 SND_SOC_DAPM_STREAM_RESUME);
1213
1214                 if (driver->capture.stream_name != NULL)
1215                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1216                                 SND_SOC_DAPM_STREAM_RESUME);
1217         }
1218
1219         /* unmute any active DACs */
1220         for (i = 0; i < card->num_rtd; i++) {
1221                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1222                 struct snd_soc_dai_driver *drv = dai->driver;
1223
1224                 if (card->rtd[i].dai_link->ignore_suspend)
1225                         continue;
1226
1227                 if (drv->ops->digital_mute && dai->playback_active)
1228                         drv->ops->digital_mute(dai, 0);
1229         }
1230
1231         for (i = 0; i < card->num_rtd; i++) {
1232                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1233                 struct snd_soc_platform *platform = card->rtd[i].platform;
1234
1235                 if (card->rtd[i].dai_link->ignore_suspend)
1236                         continue;
1237
1238                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1239                         cpu_dai->driver->resume(cpu_dai);
1240                 if (platform->driver->resume && platform->suspended) {
1241                         platform->driver->resume(cpu_dai);
1242                         platform->suspended = 0;
1243                 }
1244         }
1245
1246         if (card->resume_post)
1247                 card->resume_post(card);
1248
1249         dev_dbg(card->dev, "resume work completed\n");
1250
1251         /* userspace can access us now we are back as we were before */
1252         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1253 }
1254
1255 /* powers up audio subsystem after a suspend */
1256 int snd_soc_resume(struct device *dev)
1257 {
1258         struct snd_soc_card *card = dev_get_drvdata(dev);
1259         int i;
1260
1261         /* AC97 devices might have other drivers hanging off them so
1262          * need to resume immediately.  Other drivers don't have that
1263          * problem and may take a substantial amount of time to resume
1264          * due to I/O costs and anti-pop so handle them out of line.
1265          */
1266         for (i = 0; i < card->num_rtd; i++) {
1267                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1268                 if (cpu_dai->driver->ac97_control) {
1269                         dev_dbg(dev, "Resuming AC97 immediately\n");
1270                         soc_resume_deferred(&card->deferred_resume_work);
1271                 } else {
1272                         dev_dbg(dev, "Scheduling resume work\n");
1273                         if (!schedule_work(&card->deferred_resume_work))
1274                                 dev_err(dev, "resume work item may be lost\n");
1275                 }
1276         }
1277
1278         return 0;
1279 }
1280 EXPORT_SYMBOL_GPL(snd_soc_resume);
1281 #else
1282 #define snd_soc_suspend NULL
1283 #define snd_soc_resume NULL
1284 #endif
1285
1286 static struct snd_soc_dai_ops null_dai_ops = {
1287 };
1288
1289 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1290 {
1291         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1292         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1293         struct snd_soc_codec *codec;
1294         struct snd_soc_platform *platform;
1295         struct snd_soc_dai *codec_dai, *cpu_dai;
1296         const char *platform_name;
1297
1298         if (rtd->complete)
1299                 return 1;
1300         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1301
1302         /* do we already have the CPU DAI for this link ? */
1303         if (rtd->cpu_dai) {
1304                 goto find_codec;
1305         }
1306         /* no, then find CPU DAI from registered DAIs*/
1307         list_for_each_entry(cpu_dai, &dai_list, list) {
1308                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1309                         rtd->cpu_dai = cpu_dai;
1310                         goto find_codec;
1311                 }
1312         }
1313         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1314                         dai_link->cpu_dai_name);
1315
1316 find_codec:
1317         /* do we already have the CODEC for this link ? */
1318         if (rtd->codec) {
1319                 goto find_platform;
1320         }
1321
1322         /* no, then find CODEC from registered CODECs*/
1323         list_for_each_entry(codec, &codec_list, list) {
1324                 if (!strcmp(codec->name, dai_link->codec_name)) {
1325                         rtd->codec = codec;
1326
1327                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1328                         list_for_each_entry(codec_dai, &dai_list, list) {
1329                                 if (codec->dev == codec_dai->dev &&
1330                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1331                                         rtd->codec_dai = codec_dai;
1332                                         goto find_platform;
1333                                 }
1334                         }
1335                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1336                                         dai_link->codec_dai_name);
1337
1338                         goto find_platform;
1339                 }
1340         }
1341         dev_dbg(card->dev, "CODEC %s not registered\n",
1342                         dai_link->codec_name);
1343
1344 find_platform:
1345         /* do we need a platform? */
1346         if (rtd->platform)
1347                 goto out;
1348
1349         /* if there's no platform we match on the empty platform */
1350         platform_name = dai_link->platform_name;
1351         if (!platform_name)
1352                 platform_name = "snd-soc-dummy";
1353
1354         /* no, then find one from the set of registered platforms */
1355         list_for_each_entry(platform, &platform_list, list) {
1356                 if (!strcmp(platform->name, platform_name)) {
1357                         rtd->platform = platform;
1358                         goto out;
1359                 }
1360         }
1361
1362         dev_dbg(card->dev, "platform %s not registered\n",
1363                         dai_link->platform_name);
1364         return 0;
1365
1366 out:
1367         /* mark rtd as complete if we found all 4 of our client devices */
1368         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1369                 rtd->complete = 1;
1370                 card->num_rtd++;
1371         }
1372         return 1;
1373 }
1374
1375 static void soc_remove_codec(struct snd_soc_codec *codec)
1376 {
1377         int err;
1378
1379         if (codec->driver->remove) {
1380                 err = codec->driver->remove(codec);
1381                 if (err < 0)
1382                         dev_err(codec->dev,
1383                                 "asoc: failed to remove %s: %d\n",
1384                                 codec->name, err);
1385         }
1386
1387         /* Make sure all DAPM widgets are freed */
1388         snd_soc_dapm_free(&codec->dapm);
1389
1390         soc_cleanup_codec_debugfs(codec);
1391         codec->probed = 0;
1392         list_del(&codec->card_list);
1393         module_put(codec->dev->driver->owner);
1394 }
1395
1396 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1397 {
1398         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1399         struct snd_soc_codec *codec = rtd->codec;
1400         struct snd_soc_platform *platform = rtd->platform;
1401         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1402         int err;
1403
1404         /* unregister the rtd device */
1405         if (rtd->dev_registered) {
1406                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1407                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1408                 device_unregister(&rtd->dev);
1409                 rtd->dev_registered = 0;
1410         }
1411
1412         /* remove the CODEC DAI */
1413         if (codec_dai && codec_dai->probed) {
1414                 if (codec_dai->driver->remove) {
1415                         err = codec_dai->driver->remove(codec_dai);
1416                         if (err < 0)
1417                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1418                 }
1419                 codec_dai->probed = 0;
1420                 list_del(&codec_dai->card_list);
1421         }
1422
1423         /* remove the platform */
1424         if (platform && platform->probed) {
1425                 if (platform->driver->remove) {
1426                         err = platform->driver->remove(platform);
1427                         if (err < 0)
1428                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1429                 }
1430                 platform->probed = 0;
1431                 list_del(&platform->card_list);
1432                 module_put(platform->dev->driver->owner);
1433         }
1434
1435         /* remove the CODEC */
1436         if (codec && codec->probed)
1437                 soc_remove_codec(codec);
1438
1439         /* remove the cpu_dai */
1440         if (cpu_dai && cpu_dai->probed) {
1441                 if (cpu_dai->driver->remove) {
1442                         err = cpu_dai->driver->remove(cpu_dai);
1443                         if (err < 0)
1444                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1445                 }
1446                 cpu_dai->probed = 0;
1447                 list_del(&cpu_dai->card_list);
1448                 module_put(cpu_dai->dev->driver->owner);
1449         }
1450 }
1451
1452 static void soc_remove_dai_links(struct snd_soc_card *card)
1453 {
1454         int i;
1455
1456         for (i = 0; i < card->num_rtd; i++)
1457                 soc_remove_dai_link(card, i);
1458
1459         card->num_rtd = 0;
1460 }
1461
1462 static void soc_set_name_prefix(struct snd_soc_card *card,
1463                                 struct snd_soc_codec *codec)
1464 {
1465         int i;
1466
1467         if (card->codec_conf == NULL)
1468                 return;
1469
1470         for (i = 0; i < card->num_configs; i++) {
1471                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1472                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1473                         codec->name_prefix = map->name_prefix;
1474                         break;
1475                 }
1476         }
1477 }
1478
1479 static int soc_probe_codec(struct snd_soc_card *card,
1480                            struct snd_soc_codec *codec)
1481 {
1482         int ret = 0;
1483         const struct snd_soc_codec_driver *driver = codec->driver;
1484
1485         codec->card = card;
1486         codec->dapm.card = card;
1487         soc_set_name_prefix(card, codec);
1488
1489         if (!try_module_get(codec->dev->driver->owner))
1490                 return -ENODEV;
1491
1492         soc_init_codec_debugfs(codec);
1493
1494         if (driver->dapm_widgets)
1495                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1496                                           driver->num_dapm_widgets);
1497
1498         if (driver->probe) {
1499                 ret = driver->probe(codec);
1500                 if (ret < 0) {
1501                         dev_err(codec->dev,
1502                                 "asoc: failed to probe CODEC %s: %d\n",
1503                                 codec->name, ret);
1504                         goto err_probe;
1505                 }
1506         }
1507
1508         if (driver->controls)
1509                 snd_soc_add_controls(codec, driver->controls,
1510                                      driver->num_controls);
1511         if (driver->dapm_routes)
1512                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1513                                         driver->num_dapm_routes);
1514
1515         /* mark codec as probed and add to card codec list */
1516         codec->probed = 1;
1517         list_add(&codec->card_list, &card->codec_dev_list);
1518         list_add(&codec->dapm.list, &card->dapm_list);
1519
1520         return 0;
1521
1522 err_probe:
1523         soc_cleanup_codec_debugfs(codec);
1524         module_put(codec->dev->driver->owner);
1525
1526         return ret;
1527 }
1528
1529 static void rtd_release(struct device *dev) {}
1530
1531 static int soc_post_component_init(struct snd_soc_card *card,
1532                                    struct snd_soc_codec *codec,
1533                                    int num, int dailess)
1534 {
1535         struct snd_soc_dai_link *dai_link = NULL;
1536         struct snd_soc_aux_dev *aux_dev = NULL;
1537         struct snd_soc_pcm_runtime *rtd;
1538         const char *temp, *name;
1539         int ret = 0;
1540
1541         if (!dailess) {
1542                 dai_link = &card->dai_link[num];
1543                 rtd = &card->rtd[num];
1544                 name = dai_link->name;
1545         } else {
1546                 aux_dev = &card->aux_dev[num];
1547                 rtd = &card->rtd_aux[num];
1548                 name = aux_dev->name;
1549         }
1550         rtd->card = card;
1551
1552         /* machine controls, routes and widgets are not prefixed */
1553         temp = codec->name_prefix;
1554         codec->name_prefix = NULL;
1555
1556         /* do machine specific initialization */
1557         if (!dailess && dai_link->init)
1558                 ret = dai_link->init(rtd);
1559         else if (dailess && aux_dev->init)
1560                 ret = aux_dev->init(&codec->dapm);
1561         if (ret < 0) {
1562                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1563                 return ret;
1564         }
1565         codec->name_prefix = temp;
1566
1567         /* Make sure all DAPM widgets are instantiated */
1568         snd_soc_dapm_new_widgets(&codec->dapm);
1569
1570         /* register the rtd device */
1571         rtd->codec = codec;
1572         rtd->dev.parent = card->dev;
1573         rtd->dev.release = rtd_release;
1574         rtd->dev.init_name = name;
1575         ret = device_register(&rtd->dev);
1576         if (ret < 0) {
1577                 dev_err(card->dev,
1578                         "asoc: failed to register runtime device: %d\n", ret);
1579                 return ret;
1580         }
1581         rtd->dev_registered = 1;
1582
1583         /* add DAPM sysfs entries for this codec */
1584         ret = snd_soc_dapm_sys_add(&rtd->dev);
1585         if (ret < 0)
1586                 dev_err(codec->dev,
1587                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1588                         ret);
1589
1590         /* add codec sysfs entries */
1591         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1592         if (ret < 0)
1593                 dev_err(codec->dev,
1594                         "asoc: failed to add codec sysfs files: %d\n", ret);
1595
1596         return 0;
1597 }
1598
1599 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1600 {
1601         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1602         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1603         struct snd_soc_codec *codec = rtd->codec;
1604         struct snd_soc_platform *platform = rtd->platform;
1605         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1606         int ret;
1607
1608         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1609
1610         /* config components */
1611         codec_dai->codec = codec;
1612         cpu_dai->platform = platform;
1613         codec_dai->card = card;
1614         cpu_dai->card = card;
1615
1616         /* set default power off timeout */
1617         rtd->pmdown_time = pmdown_time;
1618
1619         /* probe the cpu_dai */
1620
1621         if (!cpu_dai->probed) {
1622                 if (!try_module_get(cpu_dai->dev->driver->owner))
1623                         return -ENODEV;
1624
1625                 if (cpu_dai->driver->probe) {
1626                         ret = cpu_dai->driver->probe(cpu_dai);
1627                         if (ret < 0) {
1628                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1629                                                 cpu_dai->name);
1630                                 module_put(cpu_dai->dev->driver->owner);
1631                                 return ret;
1632                         }
1633                 }
1634                 cpu_dai->probed = 1;
1635                 /* mark cpu_dai as probed and add to card cpu_dai list */
1636                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1637         }
1638
1639         /* probe the CODEC */
1640         if (!codec->probed) {
1641                 ret = soc_probe_codec(card, codec);
1642                 if (ret < 0)
1643                         return ret;
1644         }
1645
1646         /* probe the platform */
1647         if (!platform->probed) {
1648                 if (!try_module_get(platform->dev->driver->owner))
1649                         return -ENODEV;
1650
1651                 if (platform->driver->probe) {
1652                         ret = platform->driver->probe(platform);
1653                         if (ret < 0) {
1654                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1655                                                 platform->name);
1656                                 module_put(platform->dev->driver->owner);
1657                                 return ret;
1658                         }
1659                 }
1660                 /* mark platform as probed and add to card platform list */
1661                 platform->probed = 1;
1662                 list_add(&platform->card_list, &card->platform_dev_list);
1663         }
1664
1665         /* probe the CODEC DAI */
1666         if (!codec_dai->probed) {
1667                 if (codec_dai->driver->probe) {
1668                         ret = codec_dai->driver->probe(codec_dai);
1669                         if (ret < 0) {
1670                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1671                                                 codec_dai->name);
1672                                 return ret;
1673                         }
1674                 }
1675
1676                 /* mark cpu_dai as probed and add to card cpu_dai list */
1677                 codec_dai->probed = 1;
1678                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1679         }
1680
1681         /* DAPM dai link stream work */
1682         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1683
1684         ret = soc_post_component_init(card, codec, num, 0);
1685         if (ret)
1686                 return ret;
1687
1688         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1689         if (ret < 0)
1690                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1691
1692         /* create the pcm */
1693         ret = soc_new_pcm(rtd, num);
1694         if (ret < 0) {
1695                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1696                 return ret;
1697         }
1698
1699         /* add platform data for AC97 devices */
1700         if (rtd->codec_dai->driver->ac97_control)
1701                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1702
1703         return 0;
1704 }
1705
1706 #ifdef CONFIG_SND_SOC_AC97_BUS
1707 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1708 {
1709         int ret;
1710
1711         /* Only instantiate AC97 if not already done by the adaptor
1712          * for the generic AC97 subsystem.
1713          */
1714         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1715                 /*
1716                  * It is possible that the AC97 device is already registered to
1717                  * the device subsystem. This happens when the device is created
1718                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1719                  * is the generic AC97 glue but others migh emerge.
1720                  *
1721                  * In those cases we don't try to register the device again.
1722                  */
1723                 if (!rtd->codec->ac97_created)
1724                         return 0;
1725
1726                 ret = soc_ac97_dev_register(rtd->codec);
1727                 if (ret < 0) {
1728                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1729                         return ret;
1730                 }
1731
1732                 rtd->codec->ac97_registered = 1;
1733         }
1734         return 0;
1735 }
1736
1737 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1738 {
1739         if (codec->ac97_registered) {
1740                 soc_ac97_dev_unregister(codec);
1741                 codec->ac97_registered = 0;
1742         }
1743 }
1744 #endif
1745
1746 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1747 {
1748         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1749         struct snd_soc_codec *codec;
1750         int ret = -ENODEV;
1751
1752         /* find CODEC from registered CODECs*/
1753         list_for_each_entry(codec, &codec_list, list) {
1754                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1755                         if (codec->probed) {
1756                                 dev_err(codec->dev,
1757                                         "asoc: codec already probed");
1758                                 ret = -EBUSY;
1759                                 goto out;
1760                         }
1761                         goto found;
1762                 }
1763         }
1764         /* codec not found */
1765         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1766         goto out;
1767
1768 found:
1769         ret = soc_probe_codec(card, codec);
1770         if (ret < 0)
1771                 return ret;
1772
1773         ret = soc_post_component_init(card, codec, num, 1);
1774
1775 out:
1776         return ret;
1777 }
1778
1779 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1780 {
1781         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1782         struct snd_soc_codec *codec = rtd->codec;
1783
1784         /* unregister the rtd device */
1785         if (rtd->dev_registered) {
1786                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1787                 device_unregister(&rtd->dev);
1788                 rtd->dev_registered = 0;
1789         }
1790
1791         if (codec && codec->probed)
1792                 soc_remove_codec(codec);
1793 }
1794
1795 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1796                                     enum snd_soc_compress_type compress_type)
1797 {
1798         int ret;
1799
1800         if (codec->cache_init)
1801                 return 0;
1802
1803         /* override the compress_type if necessary */
1804         if (compress_type && codec->compress_type != compress_type)
1805                 codec->compress_type = compress_type;
1806         ret = snd_soc_cache_init(codec);
1807         if (ret < 0) {
1808                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1809                         ret);
1810                 return ret;
1811         }
1812         codec->cache_init = 1;
1813         return 0;
1814 }
1815
1816 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1817 {
1818         struct snd_soc_codec *codec;
1819         struct snd_soc_codec_conf *codec_conf;
1820         enum snd_soc_compress_type compress_type;
1821         int ret, i;
1822
1823         mutex_lock(&card->mutex);
1824
1825         if (card->instantiated) {
1826                 mutex_unlock(&card->mutex);
1827                 return;
1828         }
1829
1830         /* bind DAIs */
1831         for (i = 0; i < card->num_links; i++)
1832                 soc_bind_dai_link(card, i);
1833
1834         /* bind completed ? */
1835         if (card->num_rtd != card->num_links) {
1836                 mutex_unlock(&card->mutex);
1837                 return;
1838         }
1839
1840         /* initialize the register cache for each available codec */
1841         list_for_each_entry(codec, &codec_list, list) {
1842                 if (codec->cache_init)
1843                         continue;
1844                 /* by default we don't override the compress_type */
1845                 compress_type = 0;
1846                 /* check to see if we need to override the compress_type */
1847                 for (i = 0; i < card->num_configs; ++i) {
1848                         codec_conf = &card->codec_conf[i];
1849                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1850                                 compress_type = codec_conf->compress_type;
1851                                 if (compress_type && compress_type
1852                                     != codec->compress_type)
1853                                         break;
1854                         }
1855                 }
1856                 ret = snd_soc_init_codec_cache(codec, compress_type);
1857                 if (ret < 0) {
1858                         mutex_unlock(&card->mutex);
1859                         return;
1860                 }
1861         }
1862
1863         /* card bind complete so register a sound card */
1864         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1865                         card->owner, 0, &card->snd_card);
1866         if (ret < 0) {
1867                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1868                         card->name);
1869                 mutex_unlock(&card->mutex);
1870                 return;
1871         }
1872         card->snd_card->dev = card->dev;
1873
1874         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1875         card->dapm.dev = card->dev;
1876         card->dapm.card = card;
1877         list_add(&card->dapm.list, &card->dapm_list);
1878
1879 #ifdef CONFIG_DEBUG_FS
1880         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1881 #endif
1882
1883 #ifdef CONFIG_PM_SLEEP
1884         /* deferred resume work */
1885         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1886 #endif
1887
1888         if (card->dapm_widgets)
1889                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1890                                           card->num_dapm_widgets);
1891
1892         /* initialise the sound card only once */
1893         if (card->probe) {
1894                 ret = card->probe(card);
1895                 if (ret < 0)
1896                         goto card_probe_error;
1897         }
1898
1899         for (i = 0; i < card->num_links; i++) {
1900                 ret = soc_probe_dai_link(card, i);
1901                 if (ret < 0) {
1902                         pr_err("asoc: failed to instantiate card %s: %d\n",
1903                                card->name, ret);
1904                         goto probe_dai_err;
1905                 }
1906         }
1907
1908         for (i = 0; i < card->num_aux_devs; i++) {
1909                 ret = soc_probe_aux_dev(card, i);
1910                 if (ret < 0) {
1911                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1912                                card->name, ret);
1913                         goto probe_aux_dev_err;
1914                 }
1915         }
1916
1917         /* We should have a non-codec control add function but we don't */
1918         if (card->controls)
1919                 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1920                                                       struct snd_soc_codec,
1921                                                       card_list),
1922                                      card->controls,
1923                                      card->num_controls);
1924
1925         if (card->dapm_routes)
1926                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1927                                         card->num_dapm_routes);
1928
1929         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1930                  "%s", card->name);
1931         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1932                  "%s", card->long_name ? card->long_name : card->name);
1933         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1934                  "%s", card->driver_name ? card->driver_name : card->name);
1935
1936         if (card->late_probe) {
1937                 ret = card->late_probe(card);
1938                 if (ret < 0) {
1939                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1940                                 card->name, ret);
1941                         goto probe_aux_dev_err;
1942                 }
1943         }
1944
1945         ret = snd_card_register(card->snd_card);
1946         if (ret < 0) {
1947                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1948                 goto probe_aux_dev_err;
1949         }
1950
1951 #ifdef CONFIG_SND_SOC_AC97_BUS
1952         /* register any AC97 codecs */
1953         for (i = 0; i < card->num_rtd; i++) {
1954                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1955                 if (ret < 0) {
1956                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1957                         while (--i >= 0)
1958                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1959                         goto probe_aux_dev_err;
1960                 }
1961         }
1962 #endif
1963
1964         card->instantiated = 1;
1965         mutex_unlock(&card->mutex);
1966         return;
1967
1968 probe_aux_dev_err:
1969         for (i = 0; i < card->num_aux_devs; i++)
1970                 soc_remove_aux_dev(card, i);
1971
1972 probe_dai_err:
1973         soc_remove_dai_links(card);
1974
1975 card_probe_error:
1976         if (card->remove)
1977                 card->remove(card);
1978
1979         snd_card_free(card->snd_card);
1980
1981         mutex_unlock(&card->mutex);
1982 }
1983
1984 /*
1985  * Attempt to initialise any uninitialised cards.  Must be called with
1986  * client_mutex.
1987  */
1988 static void snd_soc_instantiate_cards(void)
1989 {
1990         struct snd_soc_card *card;
1991         list_for_each_entry(card, &card_list, list)
1992                 snd_soc_instantiate_card(card);
1993 }
1994
1995 /* probes a new socdev */
1996 static int soc_probe(struct platform_device *pdev)
1997 {
1998         struct snd_soc_card *card = platform_get_drvdata(pdev);
1999         int ret = 0;
2000
2001         /*
2002          * no card, so machine driver should be registering card
2003          * we should not be here in that case so ret error
2004          */
2005         if (!card)
2006                 return -EINVAL;
2007
2008         /* Bodge while we unpick instantiation */
2009         card->dev = &pdev->dev;
2010
2011         ret = snd_soc_register_card(card);
2012         if (ret != 0) {
2013                 dev_err(&pdev->dev, "Failed to register card\n");
2014                 return ret;
2015         }
2016
2017         return 0;
2018 }
2019
2020 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2021 {
2022         int i;
2023
2024         /* make sure any delayed work runs */
2025         for (i = 0; i < card->num_rtd; i++) {
2026                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2027                 flush_delayed_work_sync(&rtd->delayed_work);
2028         }
2029
2030         /* remove auxiliary devices */
2031         for (i = 0; i < card->num_aux_devs; i++)
2032                 soc_remove_aux_dev(card, i);
2033
2034         /* remove and free each DAI */
2035         soc_remove_dai_links(card);
2036
2037         soc_cleanup_card_debugfs(card);
2038
2039         /* remove the card */
2040         if (card->remove)
2041                 card->remove(card);
2042
2043         snd_soc_dapm_free(&card->dapm);
2044
2045         kfree(card->rtd);
2046         snd_card_free(card->snd_card);
2047         return 0;
2048
2049 }
2050
2051 /* removes a socdev */
2052 static int soc_remove(struct platform_device *pdev)
2053 {
2054         struct snd_soc_card *card = platform_get_drvdata(pdev);
2055
2056         snd_soc_unregister_card(card);
2057         return 0;
2058 }
2059
2060 int snd_soc_poweroff(struct device *dev)
2061 {
2062         struct snd_soc_card *card = dev_get_drvdata(dev);
2063         int i;
2064
2065         if (!card->instantiated)
2066                 return 0;
2067
2068         /* Flush out pmdown_time work - we actually do want to run it
2069          * now, we're shutting down so no imminent restart. */
2070         for (i = 0; i < card->num_rtd; i++) {
2071                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2072                 flush_delayed_work_sync(&rtd->delayed_work);
2073         }
2074
2075         snd_soc_dapm_shutdown(card);
2076
2077         return 0;
2078 }
2079 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2080
2081 const struct dev_pm_ops snd_soc_pm_ops = {
2082         .suspend = snd_soc_suspend,
2083         .resume = snd_soc_resume,
2084         .poweroff = snd_soc_poweroff,
2085 };
2086 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2087
2088 /* ASoC platform driver */
2089 static struct platform_driver soc_driver = {
2090         .driver         = {
2091                 .name           = "soc-audio",
2092                 .owner          = THIS_MODULE,
2093                 .pm             = &snd_soc_pm_ops,
2094         },
2095         .probe          = soc_probe,
2096         .remove         = soc_remove,
2097 };
2098
2099 /* create a new pcm */
2100 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2101 {
2102         struct snd_soc_codec *codec = rtd->codec;
2103         struct snd_soc_platform *platform = rtd->platform;
2104         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2105         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2106         struct snd_pcm *pcm;
2107         char new_name[64];
2108         int ret = 0, playback = 0, capture = 0;
2109
2110         /* check client and interface hw capabilities */
2111         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2112                         rtd->dai_link->stream_name, codec_dai->name, num);
2113
2114         if (codec_dai->driver->playback.channels_min)
2115                 playback = 1;
2116         if (codec_dai->driver->capture.channels_min)
2117                 capture = 1;
2118
2119         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2120         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2121                         num, playback, capture, &pcm);
2122         if (ret < 0) {
2123                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2124                 return ret;
2125         }
2126
2127         rtd->pcm = pcm;
2128         pcm->private_data = rtd;
2129         if (platform->driver->ops) {
2130                 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2131                 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2132                 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2133                 soc_pcm_ops.copy = platform->driver->ops->copy;
2134                 soc_pcm_ops.silence = platform->driver->ops->silence;
2135                 soc_pcm_ops.ack = platform->driver->ops->ack;
2136                 soc_pcm_ops.page = platform->driver->ops->page;
2137         }
2138
2139         if (playback)
2140                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2141
2142         if (capture)
2143                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2144
2145         if (platform->driver->pcm_new) {
2146                 ret = platform->driver->pcm_new(rtd->card->snd_card,
2147                                                 codec_dai, pcm);
2148                 if (ret < 0) {
2149                         pr_err("asoc: platform pcm constructor failed\n");
2150                         return ret;
2151                 }
2152         }
2153
2154         pcm->private_free = platform->driver->pcm_free;
2155         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2156                 cpu_dai->name);
2157         return ret;
2158 }
2159
2160 /**
2161  * snd_soc_codec_volatile_register: Report if a register is volatile.
2162  *
2163  * @codec: CODEC to query.
2164  * @reg: Register to query.
2165  *
2166  * Boolean function indiciating if a CODEC register is volatile.
2167  */
2168 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2169                                     unsigned int reg)
2170 {
2171         if (codec->volatile_register)
2172                 return codec->volatile_register(codec, reg);
2173         else
2174                 return 0;
2175 }
2176 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2177
2178 /**
2179  * snd_soc_codec_readable_register: Report if a register is readable.
2180  *
2181  * @codec: CODEC to query.
2182  * @reg: Register to query.
2183  *
2184  * Boolean function indicating if a CODEC register is readable.
2185  */
2186 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2187                                     unsigned int reg)
2188 {
2189         if (codec->readable_register)
2190                 return codec->readable_register(codec, reg);
2191         else
2192                 return 0;
2193 }
2194 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2195
2196 /**
2197  * snd_soc_codec_writable_register: Report if a register is writable.
2198  *
2199  * @codec: CODEC to query.
2200  * @reg: Register to query.
2201  *
2202  * Boolean function indicating if a CODEC register is writable.
2203  */
2204 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2205                                     unsigned int reg)
2206 {
2207         if (codec->writable_register)
2208                 return codec->writable_register(codec, reg);
2209         else
2210                 return 0;
2211 }
2212 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2213
2214 /**
2215  * snd_soc_new_ac97_codec - initailise AC97 device
2216  * @codec: audio codec
2217  * @ops: AC97 bus operations
2218  * @num: AC97 codec number
2219  *
2220  * Initialises AC97 codec resources for use by ad-hoc devices only.
2221  */
2222 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2223         struct snd_ac97_bus_ops *ops, int num)
2224 {
2225         mutex_lock(&codec->mutex);
2226
2227         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2228         if (codec->ac97 == NULL) {
2229                 mutex_unlock(&codec->mutex);
2230                 return -ENOMEM;
2231         }
2232
2233         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2234         if (codec->ac97->bus == NULL) {
2235                 kfree(codec->ac97);
2236                 codec->ac97 = NULL;
2237                 mutex_unlock(&codec->mutex);
2238                 return -ENOMEM;
2239         }
2240
2241         codec->ac97->bus->ops = ops;
2242         codec->ac97->num = num;
2243
2244         /*
2245          * Mark the AC97 device to be created by us. This way we ensure that the
2246          * device will be registered with the device subsystem later on.
2247          */
2248         codec->ac97_created = 1;
2249
2250         mutex_unlock(&codec->mutex);
2251         return 0;
2252 }
2253 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2254
2255 /**
2256  * snd_soc_free_ac97_codec - free AC97 codec device
2257  * @codec: audio codec
2258  *
2259  * Frees AC97 codec device resources.
2260  */
2261 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2262 {
2263         mutex_lock(&codec->mutex);
2264 #ifdef CONFIG_SND_SOC_AC97_BUS
2265         soc_unregister_ac97_dai_link(codec);
2266 #endif
2267         kfree(codec->ac97->bus);
2268         kfree(codec->ac97);
2269         codec->ac97 = NULL;
2270         codec->ac97_created = 0;
2271         mutex_unlock(&codec->mutex);
2272 }
2273 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2274
2275 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2276 {
2277         unsigned int ret;
2278
2279         ret = codec->read(codec, reg);
2280         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2281         trace_snd_soc_reg_read(codec, reg, ret);
2282
2283         return ret;
2284 }
2285 EXPORT_SYMBOL_GPL(snd_soc_read);
2286
2287 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2288                            unsigned int reg, unsigned int val)
2289 {
2290         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2291         trace_snd_soc_reg_write(codec, reg, val);
2292         return codec->write(codec, reg, val);
2293 }
2294 EXPORT_SYMBOL_GPL(snd_soc_write);
2295
2296 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2297                                     unsigned int reg, const void *data, size_t len)
2298 {
2299         return codec->bulk_write_raw(codec, reg, data, len);
2300 }
2301 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2302
2303 /**
2304  * snd_soc_update_bits - update codec register bits
2305  * @codec: audio codec
2306  * @reg: codec register
2307  * @mask: register mask
2308  * @value: new value
2309  *
2310  * Writes new register value.
2311  *
2312  * Returns 1 for change, 0 for no change, or negative error code.
2313  */
2314 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2315                                 unsigned int mask, unsigned int value)
2316 {
2317         int change;
2318         unsigned int old, new;
2319         int ret;
2320
2321         ret = snd_soc_read(codec, reg);
2322         if (ret < 0)
2323                 return ret;
2324
2325         old = ret;
2326         new = (old & ~mask) | value;
2327         change = old != new;
2328         if (change) {
2329                 ret = snd_soc_write(codec, reg, new);
2330                 if (ret < 0)
2331                         return ret;
2332         }
2333
2334         return change;
2335 }
2336 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2337
2338 /**
2339  * snd_soc_update_bits_locked - update codec register bits
2340  * @codec: audio codec
2341  * @reg: codec register
2342  * @mask: register mask
2343  * @value: new value
2344  *
2345  * Writes new register value, and takes the codec mutex.
2346  *
2347  * Returns 1 for change else 0.
2348  */
2349 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2350                                unsigned short reg, unsigned int mask,
2351                                unsigned int value)
2352 {
2353         int change;
2354
2355         mutex_lock(&codec->mutex);
2356         change = snd_soc_update_bits(codec, reg, mask, value);
2357         mutex_unlock(&codec->mutex);
2358
2359         return change;
2360 }
2361 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2362
2363 /**
2364  * snd_soc_test_bits - test register for change
2365  * @codec: audio codec
2366  * @reg: codec register
2367  * @mask: register mask
2368  * @value: new value
2369  *
2370  * Tests a register with a new value and checks if the new value is
2371  * different from the old value.
2372  *
2373  * Returns 1 for change else 0.
2374  */
2375 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2376                                 unsigned int mask, unsigned int value)
2377 {
2378         int change;
2379         unsigned int old, new;
2380
2381         old = snd_soc_read(codec, reg);
2382         new = (old & ~mask) | value;
2383         change = old != new;
2384
2385         return change;
2386 }
2387 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2388
2389 /**
2390  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2391  * @substream: the pcm substream
2392  * @hw: the hardware parameters
2393  *
2394  * Sets the substream runtime hardware parameters.
2395  */
2396 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2397         const struct snd_pcm_hardware *hw)
2398 {
2399         struct snd_pcm_runtime *runtime = substream->runtime;
2400         runtime->hw.info = hw->info;
2401         runtime->hw.formats = hw->formats;
2402         runtime->hw.period_bytes_min = hw->period_bytes_min;
2403         runtime->hw.period_bytes_max = hw->period_bytes_max;
2404         runtime->hw.periods_min = hw->periods_min;
2405         runtime->hw.periods_max = hw->periods_max;
2406         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2407         runtime->hw.fifo_size = hw->fifo_size;
2408         return 0;
2409 }
2410 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2411
2412 /**
2413  * snd_soc_cnew - create new control
2414  * @_template: control template
2415  * @data: control private data
2416  * @long_name: control long name
2417  * @prefix: control name prefix
2418  *
2419  * Create a new mixer control from a template control.
2420  *
2421  * Returns 0 for success, else error.
2422  */
2423 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2424                                   void *data, char *long_name,
2425                                   const char *prefix)
2426 {
2427         struct snd_kcontrol_new template;
2428         struct snd_kcontrol *kcontrol;
2429         char *name = NULL;
2430         int name_len;
2431
2432         memcpy(&template, _template, sizeof(template));
2433         template.index = 0;
2434
2435         if (!long_name)
2436                 long_name = template.name;
2437
2438         if (prefix) {
2439                 name_len = strlen(long_name) + strlen(prefix) + 2;
2440                 name = kmalloc(name_len, GFP_ATOMIC);
2441                 if (!name)
2442                         return NULL;
2443
2444                 snprintf(name, name_len, "%s %s", prefix, long_name);
2445
2446                 template.name = name;
2447         } else {
2448                 template.name = long_name;
2449         }
2450
2451         kcontrol = snd_ctl_new1(&template, data);
2452
2453         kfree(name);
2454
2455         return kcontrol;
2456 }
2457 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2458
2459 /**
2460  * snd_soc_add_controls - add an array of controls to a codec.
2461  * Convienience function to add a list of controls. Many codecs were
2462  * duplicating this code.
2463  *
2464  * @codec: codec to add controls to
2465  * @controls: array of controls to add
2466  * @num_controls: number of elements in the array
2467  *
2468  * Return 0 for success, else error.
2469  */
2470 int snd_soc_add_controls(struct snd_soc_codec *codec,
2471         const struct snd_kcontrol_new *controls, int num_controls)
2472 {
2473         struct snd_card *card = codec->card->snd_card;
2474         int err, i;
2475
2476         for (i = 0; i < num_controls; i++) {
2477                 const struct snd_kcontrol_new *control = &controls[i];
2478                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2479                                                      control->name,
2480                                                      codec->name_prefix));
2481                 if (err < 0) {
2482                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2483                                 codec->name, control->name, err);
2484                         return err;
2485                 }
2486         }
2487
2488         return 0;
2489 }
2490 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2491
2492 /**
2493  * snd_soc_info_enum_double - enumerated double mixer info callback
2494  * @kcontrol: mixer control
2495  * @uinfo: control element information
2496  *
2497  * Callback to provide information about a double enumerated
2498  * mixer control.
2499  *
2500  * Returns 0 for success.
2501  */
2502 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2503         struct snd_ctl_elem_info *uinfo)
2504 {
2505         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2506
2507         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2508         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2509         uinfo->value.enumerated.items = e->max;
2510
2511         if (uinfo->value.enumerated.item > e->max - 1)
2512                 uinfo->value.enumerated.item = e->max - 1;
2513         strcpy(uinfo->value.enumerated.name,
2514                 e->texts[uinfo->value.enumerated.item]);
2515         return 0;
2516 }
2517 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2518
2519 /**
2520  * snd_soc_get_enum_double - enumerated double mixer get callback
2521  * @kcontrol: mixer control
2522  * @ucontrol: control element information
2523  *
2524  * Callback to get the value of a double enumerated mixer.
2525  *
2526  * Returns 0 for success.
2527  */
2528 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2529         struct snd_ctl_elem_value *ucontrol)
2530 {
2531         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2532         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2533         unsigned int val, bitmask;
2534
2535         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2536                 ;
2537         val = snd_soc_read(codec, e->reg);
2538         ucontrol->value.enumerated.item[0]
2539                 = (val >> e->shift_l) & (bitmask - 1);
2540         if (e->shift_l != e->shift_r)
2541                 ucontrol->value.enumerated.item[1] =
2542                         (val >> e->shift_r) & (bitmask - 1);
2543
2544         return 0;
2545 }
2546 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2547
2548 /**
2549  * snd_soc_put_enum_double - enumerated double mixer put callback
2550  * @kcontrol: mixer control
2551  * @ucontrol: control element information
2552  *
2553  * Callback to set the value of a double enumerated mixer.
2554  *
2555  * Returns 0 for success.
2556  */
2557 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2558         struct snd_ctl_elem_value *ucontrol)
2559 {
2560         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2561         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2562         unsigned int val;
2563         unsigned int mask, bitmask;
2564
2565         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2566                 ;
2567         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2568                 return -EINVAL;
2569         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2570         mask = (bitmask - 1) << e->shift_l;
2571         if (e->shift_l != e->shift_r) {
2572                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2573                         return -EINVAL;
2574                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2575                 mask |= (bitmask - 1) << e->shift_r;
2576         }
2577
2578         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2579 }
2580 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2581
2582 /**
2583  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2584  * @kcontrol: mixer control
2585  * @ucontrol: control element information
2586  *
2587  * Callback to get the value of a double semi enumerated mixer.
2588  *
2589  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2590  * used for handling bitfield coded enumeration for example.
2591  *
2592  * Returns 0 for success.
2593  */
2594 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2595         struct snd_ctl_elem_value *ucontrol)
2596 {
2597         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2598         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2599         unsigned int reg_val, val, mux;
2600
2601         reg_val = snd_soc_read(codec, e->reg);
2602         val = (reg_val >> e->shift_l) & e->mask;
2603         for (mux = 0; mux < e->max; mux++) {
2604                 if (val == e->values[mux])
2605                         break;
2606         }
2607         ucontrol->value.enumerated.item[0] = mux;
2608         if (e->shift_l != e->shift_r) {
2609                 val = (reg_val >> e->shift_r) & e->mask;
2610                 for (mux = 0; mux < e->max; mux++) {
2611                         if (val == e->values[mux])
2612                                 break;
2613                 }
2614                 ucontrol->value.enumerated.item[1] = mux;
2615         }
2616
2617         return 0;
2618 }
2619 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2620
2621 /**
2622  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2623  * @kcontrol: mixer control
2624  * @ucontrol: control element information
2625  *
2626  * Callback to set the value of a double semi enumerated mixer.
2627  *
2628  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2629  * used for handling bitfield coded enumeration for example.
2630  *
2631  * Returns 0 for success.
2632  */
2633 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2634         struct snd_ctl_elem_value *ucontrol)
2635 {
2636         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2637         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2638         unsigned int val;
2639         unsigned int mask;
2640
2641         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2642                 return -EINVAL;
2643         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2644         mask = e->mask << e->shift_l;
2645         if (e->shift_l != e->shift_r) {
2646                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2647                         return -EINVAL;
2648                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2649                 mask |= e->mask << e->shift_r;
2650         }
2651
2652         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2653 }
2654 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2655
2656 /**
2657  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2658  * @kcontrol: mixer control
2659  * @uinfo: control element information
2660  *
2661  * Callback to provide information about an external enumerated
2662  * single mixer.
2663  *
2664  * Returns 0 for success.
2665  */
2666 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2667         struct snd_ctl_elem_info *uinfo)
2668 {
2669         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2670
2671         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2672         uinfo->count = 1;
2673         uinfo->value.enumerated.items = e->max;
2674
2675         if (uinfo->value.enumerated.item > e->max - 1)
2676                 uinfo->value.enumerated.item = e->max - 1;
2677         strcpy(uinfo->value.enumerated.name,
2678                 e->texts[uinfo->value.enumerated.item]);
2679         return 0;
2680 }
2681 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2682
2683 /**
2684  * snd_soc_info_volsw_ext - external single mixer info callback
2685  * @kcontrol: mixer control
2686  * @uinfo: control element information
2687  *
2688  * Callback to provide information about a single external mixer control.
2689  *
2690  * Returns 0 for success.
2691  */
2692 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2693         struct snd_ctl_elem_info *uinfo)
2694 {
2695         int max = kcontrol->private_value;
2696
2697         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2698                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2699         else
2700                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2701
2702         uinfo->count = 1;
2703         uinfo->value.integer.min = 0;
2704         uinfo->value.integer.max = max;
2705         return 0;
2706 }
2707 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2708
2709 /**
2710  * snd_soc_info_volsw - single mixer info callback
2711  * @kcontrol: mixer control
2712  * @uinfo: control element information
2713  *
2714  * Callback to provide information about a single mixer control.
2715  *
2716  * Returns 0 for success.
2717  */
2718 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2719         struct snd_ctl_elem_info *uinfo)
2720 {
2721         struct soc_mixer_control *mc =
2722                 (struct soc_mixer_control *)kcontrol->private_value;
2723         int platform_max;
2724         unsigned int shift = mc->shift;
2725         unsigned int rshift = mc->rshift;
2726
2727         if (!mc->platform_max)
2728                 mc->platform_max = mc->max;
2729         platform_max = mc->platform_max;
2730
2731         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2732                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2733         else
2734                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2735
2736         uinfo->count = shift == rshift ? 1 : 2;
2737         uinfo->value.integer.min = 0;
2738         uinfo->value.integer.max = platform_max;
2739         return 0;
2740 }
2741 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2742
2743 /**
2744  * snd_soc_get_volsw - single mixer get callback
2745  * @kcontrol: mixer control
2746  * @ucontrol: control element information
2747  *
2748  * Callback to get the value of a single mixer control.
2749  *
2750  * Returns 0 for success.
2751  */
2752 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2753         struct snd_ctl_elem_value *ucontrol)
2754 {
2755         struct soc_mixer_control *mc =
2756                 (struct soc_mixer_control *)kcontrol->private_value;
2757         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2758         unsigned int reg = mc->reg;
2759         unsigned int shift = mc->shift;
2760         unsigned int rshift = mc->rshift;
2761         int max = mc->max;
2762         unsigned int mask = (1 << fls(max)) - 1;
2763         unsigned int invert = mc->invert;
2764
2765         ucontrol->value.integer.value[0] =
2766                 (snd_soc_read(codec, reg) >> shift) & mask;
2767         if (shift != rshift)
2768                 ucontrol->value.integer.value[1] =
2769                         (snd_soc_read(codec, reg) >> rshift) & mask;
2770         if (invert) {
2771                 ucontrol->value.integer.value[0] =
2772                         max - ucontrol->value.integer.value[0];
2773                 if (shift != rshift)
2774                         ucontrol->value.integer.value[1] =
2775                                 max - ucontrol->value.integer.value[1];
2776         }
2777
2778         return 0;
2779 }
2780 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2781
2782 /**
2783  * snd_soc_put_volsw - single mixer put callback
2784  * @kcontrol: mixer control
2785  * @ucontrol: control element information
2786  *
2787  * Callback to set the value of a single mixer control.
2788  *
2789  * Returns 0 for success.
2790  */
2791 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2792         struct snd_ctl_elem_value *ucontrol)
2793 {
2794         struct soc_mixer_control *mc =
2795                 (struct soc_mixer_control *)kcontrol->private_value;
2796         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2797         unsigned int reg = mc->reg;
2798         unsigned int shift = mc->shift;
2799         unsigned int rshift = mc->rshift;
2800         int max = mc->max;
2801         unsigned int mask = (1 << fls(max)) - 1;
2802         unsigned int invert = mc->invert;
2803         unsigned int val, val2, val_mask;
2804
2805         val = (ucontrol->value.integer.value[0] & mask);
2806         if (invert)
2807                 val = max - val;
2808         val_mask = mask << shift;
2809         val = val << shift;
2810         if (shift != rshift) {
2811                 val2 = (ucontrol->value.integer.value[1] & mask);
2812                 if (invert)
2813                         val2 = max - val2;
2814                 val_mask |= mask << rshift;
2815                 val |= val2 << rshift;
2816         }
2817         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2818 }
2819 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2820
2821 /**
2822  * snd_soc_info_volsw_2r - double mixer info callback
2823  * @kcontrol: mixer control
2824  * @uinfo: control element information
2825  *
2826  * Callback to provide information about a double mixer control that
2827  * spans 2 codec registers.
2828  *
2829  * Returns 0 for success.
2830  */
2831 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2832         struct snd_ctl_elem_info *uinfo)
2833 {
2834         struct soc_mixer_control *mc =
2835                 (struct soc_mixer_control *)kcontrol->private_value;
2836         int platform_max;
2837
2838         if (!mc->platform_max)
2839                 mc->platform_max = mc->max;
2840         platform_max = mc->platform_max;
2841
2842         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2843                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2844         else
2845                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2846
2847         uinfo->count = 2;
2848         uinfo->value.integer.min = 0;
2849         uinfo->value.integer.max = platform_max;
2850         return 0;
2851 }
2852 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2853
2854 /**
2855  * snd_soc_get_volsw_2r - double mixer get callback
2856  * @kcontrol: mixer control
2857  * @ucontrol: control element information
2858  *
2859  * Callback to get the value of a double mixer control that spans 2 registers.
2860  *
2861  * Returns 0 for success.
2862  */
2863 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2864         struct snd_ctl_elem_value *ucontrol)
2865 {
2866         struct soc_mixer_control *mc =
2867                 (struct soc_mixer_control *)kcontrol->private_value;
2868         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2869         unsigned int reg = mc->reg;
2870         unsigned int reg2 = mc->rreg;
2871         unsigned int shift = mc->shift;
2872         int max = mc->max;
2873         unsigned int mask = (1 << fls(max)) - 1;
2874         unsigned int invert = mc->invert;
2875
2876         ucontrol->value.integer.value[0] =
2877                 (snd_soc_read(codec, reg) >> shift) & mask;
2878         ucontrol->value.integer.value[1] =
2879                 (snd_soc_read(codec, reg2) >> shift) & mask;
2880         if (invert) {
2881                 ucontrol->value.integer.value[0] =
2882                         max - ucontrol->value.integer.value[0];
2883                 ucontrol->value.integer.value[1] =
2884                         max - ucontrol->value.integer.value[1];
2885         }
2886
2887         return 0;
2888 }
2889 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2890
2891 /**
2892  * snd_soc_put_volsw_2r - double mixer set callback
2893  * @kcontrol: mixer control
2894  * @ucontrol: control element information
2895  *
2896  * Callback to set the value of a double mixer control that spans 2 registers.
2897  *
2898  * Returns 0 for success.
2899  */
2900 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2901         struct snd_ctl_elem_value *ucontrol)
2902 {
2903         struct soc_mixer_control *mc =
2904                 (struct soc_mixer_control *)kcontrol->private_value;
2905         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2906         unsigned int reg = mc->reg;
2907         unsigned int reg2 = mc->rreg;
2908         unsigned int shift = mc->shift;
2909         int max = mc->max;
2910         unsigned int mask = (1 << fls(max)) - 1;
2911         unsigned int invert = mc->invert;
2912         int err;
2913         unsigned int val, val2, val_mask;
2914
2915         val_mask = mask << shift;
2916         val = (ucontrol->value.integer.value[0] & mask);
2917         val2 = (ucontrol->value.integer.value[1] & mask);
2918
2919         if (invert) {
2920                 val = max - val;
2921                 val2 = max - val2;
2922         }
2923
2924         val = val << shift;
2925         val2 = val2 << shift;
2926
2927         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2928         if (err < 0)
2929                 return err;
2930
2931         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2932         return err;
2933 }
2934 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2935
2936 /**
2937  * snd_soc_info_volsw_s8 - signed mixer info callback
2938  * @kcontrol: mixer control
2939  * @uinfo: control element information
2940  *
2941  * Callback to provide information about a signed mixer control.
2942  *
2943  * Returns 0 for success.
2944  */
2945 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2946         struct snd_ctl_elem_info *uinfo)
2947 {
2948         struct soc_mixer_control *mc =
2949                 (struct soc_mixer_control *)kcontrol->private_value;
2950         int platform_max;
2951         int min = mc->min;
2952
2953         if (!mc->platform_max)
2954                 mc->platform_max = mc->max;
2955         platform_max = mc->platform_max;
2956
2957         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2958         uinfo->count = 2;
2959         uinfo->value.integer.min = 0;
2960         uinfo->value.integer.max = platform_max - min;
2961         return 0;
2962 }
2963 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2964
2965 /**
2966  * snd_soc_get_volsw_s8 - signed mixer get callback
2967  * @kcontrol: mixer control
2968  * @ucontrol: control element information
2969  *
2970  * Callback to get the value of a signed mixer control.
2971  *
2972  * Returns 0 for success.
2973  */
2974 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2975         struct snd_ctl_elem_value *ucontrol)
2976 {
2977         struct soc_mixer_control *mc =
2978                 (struct soc_mixer_control *)kcontrol->private_value;
2979         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2980         unsigned int reg = mc->reg;
2981         int min = mc->min;
2982         int val = snd_soc_read(codec, reg);
2983
2984         ucontrol->value.integer.value[0] =
2985                 ((signed char)(val & 0xff))-min;
2986         ucontrol->value.integer.value[1] =
2987                 ((signed char)((val >> 8) & 0xff))-min;
2988         return 0;
2989 }
2990 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2991
2992 /**
2993  * snd_soc_put_volsw_sgn - signed mixer put callback
2994  * @kcontrol: mixer control
2995  * @ucontrol: control element information
2996  *
2997  * Callback to set the value of a signed mixer control.
2998  *
2999  * Returns 0 for success.
3000  */
3001 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
3002         struct snd_ctl_elem_value *ucontrol)
3003 {
3004         struct soc_mixer_control *mc =
3005                 (struct soc_mixer_control *)kcontrol->private_value;
3006         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3007         unsigned int reg = mc->reg;
3008         int min = mc->min;
3009         unsigned int val;
3010
3011         val = (ucontrol->value.integer.value[0]+min) & 0xff;
3012         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3013
3014         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3015 }
3016 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3017
3018 /**
3019  * snd_soc_limit_volume - Set new limit to an existing volume control.
3020  *
3021  * @codec: where to look for the control
3022  * @name: Name of the control
3023  * @max: new maximum limit
3024  *
3025  * Return 0 for success, else error.
3026  */
3027 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3028         const char *name, int max)
3029 {
3030         struct snd_card *card = codec->card->snd_card;
3031         struct snd_kcontrol *kctl;
3032         struct soc_mixer_control *mc;
3033         int found = 0;
3034         int ret = -EINVAL;
3035
3036         /* Sanity check for name and max */
3037         if (unlikely(!name || max <= 0))
3038                 return -EINVAL;
3039
3040         list_for_each_entry(kctl, &card->controls, list) {
3041                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3042                         found = 1;
3043                         break;
3044                 }
3045         }
3046         if (found) {
3047                 mc = (struct soc_mixer_control *)kctl->private_value;
3048                 if (max <= mc->max) {
3049                         mc->platform_max = max;
3050                         ret = 0;
3051                 }
3052         }
3053         return ret;
3054 }
3055 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3056
3057 /**
3058  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
3059  *  mixer info callback
3060  * @kcontrol: mixer control
3061  * @uinfo: control element information
3062  *
3063  * Returns 0 for success.
3064  */
3065 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3066                         struct snd_ctl_elem_info *uinfo)
3067 {
3068         struct soc_mixer_control *mc =
3069                 (struct soc_mixer_control *)kcontrol->private_value;
3070         int max = mc->max;
3071         int min = mc->min;
3072
3073         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3074         uinfo->count = 2;
3075         uinfo->value.integer.min = 0;
3076         uinfo->value.integer.max = max-min;
3077
3078         return 0;
3079 }
3080 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3081
3082 /**
3083  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3084  *  mixer get callback
3085  * @kcontrol: mixer control
3086  * @uinfo: control element information
3087  *
3088  * Returns 0 for success.
3089  */
3090 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3091                         struct snd_ctl_elem_value *ucontrol)
3092 {
3093         struct soc_mixer_control *mc =
3094                 (struct soc_mixer_control *)kcontrol->private_value;
3095         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3096         unsigned int mask = (1<<mc->shift)-1;
3097         int min = mc->min;
3098         int val = snd_soc_read(codec, mc->reg) & mask;
3099         int valr = snd_soc_read(codec, mc->rreg) & mask;
3100
3101         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3102         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3103         return 0;
3104 }
3105 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3106
3107 /**
3108  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3109  *  mixer put callback
3110  * @kcontrol: mixer control
3111  * @uinfo: control element information
3112  *
3113  * Returns 0 for success.
3114  */
3115 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3116                         struct snd_ctl_elem_value *ucontrol)
3117 {
3118         struct soc_mixer_control *mc =
3119                 (struct soc_mixer_control *)kcontrol->private_value;
3120         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3121         unsigned int mask = (1<<mc->shift)-1;
3122         int min = mc->min;
3123         int ret;
3124         unsigned int val, valr, oval, ovalr;
3125
3126         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3127         val &= mask;
3128         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3129         valr &= mask;
3130
3131         oval = snd_soc_read(codec, mc->reg) & mask;
3132         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3133
3134         ret = 0;
3135         if (oval != val) {
3136                 ret = snd_soc_write(codec, mc->reg, val);
3137                 if (ret < 0)
3138                         return ret;
3139         }
3140         if (ovalr != valr) {
3141                 ret = snd_soc_write(codec, mc->rreg, valr);
3142                 if (ret < 0)
3143                         return ret;
3144         }
3145
3146         return 0;
3147 }
3148 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3149
3150 /**
3151  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3152  * @dai: DAI
3153  * @clk_id: DAI specific clock ID
3154  * @freq: new clock frequency in Hz
3155  * @dir: new clock direction - input/output.
3156  *
3157  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3158  */
3159 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3160         unsigned int freq, int dir)
3161 {
3162         if (dai->driver && dai->driver->ops->set_sysclk)
3163                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3164         else if (dai->codec && dai->codec->driver->set_sysclk)
3165                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3166                                                       freq, dir);
3167         else
3168                 return -EINVAL;
3169 }
3170 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3171
3172 /**
3173  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3174  * @codec: CODEC
3175  * @clk_id: DAI specific clock ID
3176  * @freq: new clock frequency in Hz
3177  * @dir: new clock direction - input/output.
3178  *
3179  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3180  */
3181 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3182         unsigned int freq, int dir)
3183 {
3184         if (codec->driver->set_sysclk)
3185                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3186         else
3187                 return -EINVAL;
3188 }
3189 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3190
3191 /**
3192  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3193  * @dai: DAI
3194  * @div_id: DAI specific clock divider ID
3195  * @div: new clock divisor.
3196  *
3197  * Configures the clock dividers. This is used to derive the best DAI bit and
3198  * frame clocks from the system or master clock. It's best to set the DAI bit
3199  * and frame clocks as low as possible to save system power.
3200  */
3201 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3202         int div_id, int div)
3203 {
3204         if (dai->driver && dai->driver->ops->set_clkdiv)
3205                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3206         else
3207                 return -EINVAL;
3208 }
3209 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3210
3211 /**
3212  * snd_soc_dai_set_pll - configure DAI PLL.
3213  * @dai: DAI
3214  * @pll_id: DAI specific PLL ID
3215  * @source: DAI specific source for the PLL
3216  * @freq_in: PLL input clock frequency in Hz
3217  * @freq_out: requested PLL output clock frequency in Hz
3218  *
3219  * Configures and enables PLL to generate output clock based on input clock.
3220  */
3221 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3222         unsigned int freq_in, unsigned int freq_out)
3223 {
3224         if (dai->driver && dai->driver->ops->set_pll)
3225                 return dai->driver->ops->set_pll(dai, pll_id, source,
3226                                          freq_in, freq_out);
3227         else if (dai->codec && dai->codec->driver->set_pll)
3228                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3229                                                    freq_in, freq_out);
3230         else
3231                 return -EINVAL;
3232 }
3233 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3234
3235 /*
3236  * snd_soc_codec_set_pll - configure codec PLL.
3237  * @codec: CODEC
3238  * @pll_id: DAI specific PLL ID
3239  * @source: DAI specific source for the PLL
3240  * @freq_in: PLL input clock frequency in Hz
3241  * @freq_out: requested PLL output clock frequency in Hz
3242  *
3243  * Configures and enables PLL to generate output clock based on input clock.
3244  */
3245 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3246                           unsigned int freq_in, unsigned int freq_out)
3247 {
3248         if (codec->driver->set_pll)
3249                 return codec->driver->set_pll(codec, pll_id, source,
3250                                               freq_in, freq_out);
3251         else
3252                 return -EINVAL;
3253 }
3254 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3255
3256 /**
3257  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3258  * @dai: DAI
3259  * @fmt: SND_SOC_DAIFMT_ format value.
3260  *
3261  * Configures the DAI hardware format and clocking.
3262  */
3263 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3264 {
3265         if (dai->driver && dai->driver->ops->set_fmt)
3266                 return dai->driver->ops->set_fmt(dai, fmt);
3267         else
3268                 return -EINVAL;
3269 }
3270 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3271
3272 /**
3273  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3274  * @dai: DAI
3275  * @tx_mask: bitmask representing active TX slots.
3276  * @rx_mask: bitmask representing active RX slots.
3277  * @slots: Number of slots in use.
3278  * @slot_width: Width in bits for each slot.
3279  *
3280  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3281  * specific.
3282  */
3283 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3284         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3285 {
3286         if (dai->driver && dai->driver->ops->set_tdm_slot)
3287                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3288                                 slots, slot_width);
3289         else
3290                 return -EINVAL;
3291 }
3292 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3293
3294 /**
3295  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3296  * @dai: DAI
3297  * @tx_num: how many TX channels
3298  * @tx_slot: pointer to an array which imply the TX slot number channel
3299  *           0~num-1 uses
3300  * @rx_num: how many RX channels
3301  * @rx_slot: pointer to an array which imply the RX slot number channel
3302  *           0~num-1 uses
3303  *
3304  * configure the relationship between channel number and TDM slot number.
3305  */
3306 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3307         unsigned int tx_num, unsigned int *tx_slot,
3308         unsigned int rx_num, unsigned int *rx_slot)
3309 {
3310         if (dai->driver && dai->driver->ops->set_channel_map)
3311                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3312                         rx_num, rx_slot);
3313         else
3314                 return -EINVAL;
3315 }
3316 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3317
3318 /**
3319  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3320  * @dai: DAI
3321  * @tristate: tristate enable
3322  *
3323  * Tristates the DAI so that others can use it.
3324  */
3325 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3326 {
3327         if (dai->driver && dai->driver->ops->set_tristate)
3328                 return dai->driver->ops->set_tristate(dai, tristate);
3329         else
3330                 return -EINVAL;
3331 }
3332 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3333
3334 /**
3335  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3336  * @dai: DAI
3337  * @mute: mute enable
3338  *
3339  * Mutes the DAI DAC.
3340  */
3341 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3342 {
3343         if (dai->driver && dai->driver->ops->digital_mute)
3344                 return dai->driver->ops->digital_mute(dai, mute);
3345         else
3346                 return -EINVAL;
3347 }
3348 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3349
3350 /**
3351  * snd_soc_register_card - Register a card with the ASoC core
3352  *
3353  * @card: Card to register
3354  *
3355  */
3356 int snd_soc_register_card(struct snd_soc_card *card)
3357 {
3358         int i;
3359
3360         if (!card->name || !card->dev)
3361                 return -EINVAL;
3362
3363         dev_set_drvdata(card->dev, card);
3364
3365         snd_soc_initialize_card_lists(card);
3366
3367         soc_init_card_debugfs(card);
3368
3369         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3370                             (card->num_links + card->num_aux_devs),
3371                             GFP_KERNEL);
3372         if (card->rtd == NULL)
3373                 return -ENOMEM;
3374         card->rtd_aux = &card->rtd[card->num_links];
3375
3376         for (i = 0; i < card->num_links; i++)
3377                 card->rtd[i].dai_link = &card->dai_link[i];
3378
3379         INIT_LIST_HEAD(&card->list);
3380         card->instantiated = 0;
3381         mutex_init(&card->mutex);
3382
3383         mutex_lock(&client_mutex);
3384         list_add(&card->list, &card_list);
3385         snd_soc_instantiate_cards();
3386         mutex_unlock(&client_mutex);
3387
3388         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3389
3390         return 0;
3391 }
3392 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3393
3394 /**
3395  * snd_soc_unregister_card - Unregister a card with the ASoC core
3396  *
3397  * @card: Card to unregister
3398  *
3399  */
3400 int snd_soc_unregister_card(struct snd_soc_card *card)
3401 {
3402         if (card->instantiated)
3403                 soc_cleanup_card_resources(card);
3404         mutex_lock(&client_mutex);
3405         list_del(&card->list);
3406         mutex_unlock(&client_mutex);
3407         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3408
3409         return 0;
3410 }
3411 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3412
3413 /*
3414  * Simplify DAI link configuration by removing ".-1" from device names
3415  * and sanitizing names.
3416  */
3417 static char *fmt_single_name(struct device *dev, int *id)
3418 {
3419         char *found, name[NAME_SIZE];
3420         int id1, id2;
3421
3422         if (dev_name(dev) == NULL)
3423                 return NULL;
3424
3425         strlcpy(name, dev_name(dev), NAME_SIZE);
3426
3427         /* are we a "%s.%d" name (platform and SPI components) */
3428         found = strstr(name, dev->driver->name);
3429         if (found) {
3430                 /* get ID */
3431                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3432
3433                         /* discard ID from name if ID == -1 */
3434                         if (*id == -1)
3435                                 found[strlen(dev->driver->name)] = '\0';
3436                 }
3437
3438         } else {
3439                 /* I2C component devices are named "bus-addr"  */
3440                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3441                         char tmp[NAME_SIZE];
3442
3443                         /* create unique ID number from I2C addr and bus */
3444                         *id = ((id1 & 0xffff) << 16) + id2;
3445
3446                         /* sanitize component name for DAI link creation */
3447                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3448                         strlcpy(name, tmp, NAME_SIZE);
3449                 } else
3450                         *id = 0;
3451         }
3452
3453         return kstrdup(name, GFP_KERNEL);
3454 }
3455
3456 /*
3457  * Simplify DAI link naming for single devices with multiple DAIs by removing
3458  * any ".-1" and using the DAI name (instead of device name).
3459  */
3460 static inline char *fmt_multiple_name(struct device *dev,
3461                 struct snd_soc_dai_driver *dai_drv)
3462 {
3463         if (dai_drv->name == NULL) {
3464                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3465                                 dev_name(dev));
3466                 return NULL;
3467         }
3468
3469         return kstrdup(dai_drv->name, GFP_KERNEL);
3470 }
3471
3472 /**
3473  * snd_soc_register_dai - Register a DAI with the ASoC core
3474  *
3475  * @dai: DAI to register
3476  */
3477 int snd_soc_register_dai(struct device *dev,
3478                 struct snd_soc_dai_driver *dai_drv)
3479 {
3480         struct snd_soc_dai *dai;
3481
3482         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3483
3484         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3485         if (dai == NULL)
3486                 return -ENOMEM;
3487
3488         /* create DAI component name */
3489         dai->name = fmt_single_name(dev, &dai->id);
3490         if (dai->name == NULL) {
3491                 kfree(dai);
3492                 return -ENOMEM;
3493         }
3494
3495         dai->dev = dev;
3496         dai->driver = dai_drv;
3497         if (!dai->driver->ops)
3498                 dai->driver->ops = &null_dai_ops;
3499
3500         mutex_lock(&client_mutex);
3501         list_add(&dai->list, &dai_list);
3502         snd_soc_instantiate_cards();
3503         mutex_unlock(&client_mutex);
3504
3505         pr_debug("Registered DAI '%s'\n", dai->name);
3506
3507         return 0;
3508 }
3509 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3510
3511 /**
3512  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3513  *
3514  * @dai: DAI to unregister
3515  */
3516 void snd_soc_unregister_dai(struct device *dev)
3517 {
3518         struct snd_soc_dai *dai;
3519
3520         list_for_each_entry(dai, &dai_list, list) {
3521                 if (dev == dai->dev)
3522                         goto found;
3523         }
3524         return;
3525
3526 found:
3527         mutex_lock(&client_mutex);
3528         list_del(&dai->list);
3529         mutex_unlock(&client_mutex);
3530
3531         pr_debug("Unregistered DAI '%s'\n", dai->name);
3532         kfree(dai->name);
3533         kfree(dai);
3534 }
3535 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3536
3537 /**
3538  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3539  *
3540  * @dai: Array of DAIs to register
3541  * @count: Number of DAIs
3542  */
3543 int snd_soc_register_dais(struct device *dev,
3544                 struct snd_soc_dai_driver *dai_drv, size_t count)
3545 {
3546         struct snd_soc_dai *dai;
3547         int i, ret = 0;
3548
3549         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3550
3551         for (i = 0; i < count; i++) {
3552
3553                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3554                 if (dai == NULL) {
3555                         ret = -ENOMEM;
3556                         goto err;
3557                 }
3558
3559                 /* create DAI component name */
3560                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3561                 if (dai->name == NULL) {
3562                         kfree(dai);
3563                         ret = -EINVAL;
3564                         goto err;
3565                 }
3566
3567                 dai->dev = dev;
3568                 dai->driver = &dai_drv[i];
3569                 if (dai->driver->id)
3570                         dai->id = dai->driver->id;
3571                 else
3572                         dai->id = i;
3573                 if (!dai->driver->ops)
3574                         dai->driver->ops = &null_dai_ops;
3575
3576                 mutex_lock(&client_mutex);
3577                 list_add(&dai->list, &dai_list);
3578                 mutex_unlock(&client_mutex);
3579
3580                 pr_debug("Registered DAI '%s'\n", dai->name);
3581         }
3582
3583         mutex_lock(&client_mutex);
3584         snd_soc_instantiate_cards();
3585         mutex_unlock(&client_mutex);
3586         return 0;
3587
3588 err:
3589         for (i--; i >= 0; i--)
3590                 snd_soc_unregister_dai(dev);
3591
3592         return ret;
3593 }
3594 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3595
3596 /**
3597  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3598  *
3599  * @dai: Array of DAIs to unregister
3600  * @count: Number of DAIs
3601  */
3602 void snd_soc_unregister_dais(struct device *dev, size_t count)
3603 {
3604         int i;
3605
3606         for (i = 0; i < count; i++)
3607                 snd_soc_unregister_dai(dev);
3608 }
3609 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3610
3611 /**
3612  * snd_soc_register_platform - Register a platform with the ASoC core
3613  *
3614  * @platform: platform to register
3615  */
3616 int snd_soc_register_platform(struct device *dev,
3617                 struct snd_soc_platform_driver *platform_drv)
3618 {
3619         struct snd_soc_platform *platform;
3620
3621         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3622
3623         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3624         if (platform == NULL)
3625                 return -ENOMEM;
3626
3627         /* create platform component name */
3628         platform->name = fmt_single_name(dev, &platform->id);
3629         if (platform->name == NULL) {
3630                 kfree(platform);
3631                 return -ENOMEM;
3632         }
3633
3634         platform->dev = dev;
3635         platform->driver = platform_drv;
3636
3637         mutex_lock(&client_mutex);
3638         list_add(&platform->list, &platform_list);
3639         snd_soc_instantiate_cards();
3640         mutex_unlock(&client_mutex);
3641
3642         pr_debug("Registered platform '%s'\n", platform->name);
3643
3644         return 0;
3645 }
3646 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3647
3648 /**
3649  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3650  *
3651  * @platform: platform to unregister
3652  */
3653 void snd_soc_unregister_platform(struct device *dev)
3654 {
3655         struct snd_soc_platform *platform;
3656
3657         list_for_each_entry(platform, &platform_list, list) {
3658                 if (dev == platform->dev)
3659                         goto found;
3660         }
3661         return;
3662
3663 found:
3664         mutex_lock(&client_mutex);
3665         list_del(&platform->list);
3666         mutex_unlock(&client_mutex);
3667
3668         pr_debug("Unregistered platform '%s'\n", platform->name);
3669         kfree(platform->name);
3670         kfree(platform);
3671 }
3672 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3673
3674 static u64 codec_format_map[] = {
3675         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3676         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3677         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3678         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3679         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3680         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3681         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3682         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3683         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3684         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3685         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3686         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3687         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3688         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3689         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3690         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3691 };
3692
3693 /* Fix up the DAI formats for endianness: codecs don't actually see
3694  * the endianness of the data but we're using the CPU format
3695  * definitions which do need to include endianness so we ensure that
3696  * codec DAIs always have both big and little endian variants set.
3697  */
3698 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3699 {
3700         int i;
3701
3702         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3703                 if (stream->formats & codec_format_map[i])
3704                         stream->formats |= codec_format_map[i];
3705 }
3706
3707 /**
3708  * snd_soc_register_codec - Register a codec with the ASoC core
3709  *
3710  * @codec: codec to register
3711  */
3712 int snd_soc_register_codec(struct device *dev,
3713                            const struct snd_soc_codec_driver *codec_drv,
3714                            struct snd_soc_dai_driver *dai_drv,
3715                            int num_dai)
3716 {
3717         size_t reg_size;
3718         struct snd_soc_codec *codec;
3719         int ret, i;
3720
3721         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3722
3723         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3724         if (codec == NULL)
3725                 return -ENOMEM;
3726
3727         /* create CODEC component name */
3728         codec->name = fmt_single_name(dev, &codec->id);
3729         if (codec->name == NULL) {
3730                 kfree(codec);
3731                 return -ENOMEM;
3732         }
3733
3734         if (codec_drv->compress_type)
3735                 codec->compress_type = codec_drv->compress_type;
3736         else
3737                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3738
3739         codec->write = codec_drv->write;
3740         codec->read = codec_drv->read;
3741         codec->volatile_register = codec_drv->volatile_register;
3742         codec->readable_register = codec_drv->readable_register;
3743         codec->writable_register = codec_drv->writable_register;
3744         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3745         codec->dapm.dev = dev;
3746         codec->dapm.codec = codec;
3747         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3748         codec->dev = dev;
3749         codec->driver = codec_drv;
3750         codec->num_dai = num_dai;
3751         mutex_init(&codec->mutex);
3752
3753         /* allocate CODEC register cache */
3754         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3755                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3756                 codec->reg_size = reg_size;
3757                 /* it is necessary to make a copy of the default register cache
3758                  * because in the case of using a compression type that requires
3759                  * the default register cache to be marked as __devinitconst the
3760                  * kernel might have freed the array by the time we initialize
3761                  * the cache.
3762                  */
3763                 if (codec_drv->reg_cache_default) {
3764                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3765                                                       reg_size, GFP_KERNEL);
3766                         if (!codec->reg_def_copy) {
3767                                 ret = -ENOMEM;
3768                                 goto fail;
3769                         }
3770                 }
3771         }
3772
3773         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3774                 if (!codec->volatile_register)
3775                         codec->volatile_register = snd_soc_default_volatile_register;
3776                 if (!codec->readable_register)
3777                         codec->readable_register = snd_soc_default_readable_register;
3778                 if (!codec->writable_register)
3779                         codec->writable_register = snd_soc_default_writable_register;
3780         }
3781
3782         for (i = 0; i < num_dai; i++) {
3783                 fixup_codec_formats(&dai_drv[i].playback);
3784                 fixup_codec_formats(&dai_drv[i].capture);
3785         }
3786
3787         /* register any DAIs */
3788         if (num_dai) {
3789                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3790                 if (ret < 0)
3791                         goto fail;
3792         }
3793
3794         mutex_lock(&client_mutex);
3795         list_add(&codec->list, &codec_list);
3796         snd_soc_instantiate_cards();
3797         mutex_unlock(&client_mutex);
3798
3799         pr_debug("Registered codec '%s'\n", codec->name);
3800         return 0;
3801
3802 fail:
3803         kfree(codec->reg_def_copy);
3804         codec->reg_def_copy = NULL;
3805         kfree(codec->name);
3806         kfree(codec);
3807         return ret;
3808 }
3809 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3810
3811 /**
3812  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3813  *
3814  * @codec: codec to unregister
3815  */
3816 void snd_soc_unregister_codec(struct device *dev)
3817 {
3818         struct snd_soc_codec *codec;
3819         int i;
3820
3821         list_for_each_entry(codec, &codec_list, list) {
3822                 if (dev == codec->dev)
3823                         goto found;
3824         }
3825         return;
3826
3827 found:
3828         if (codec->num_dai)
3829                 for (i = 0; i < codec->num_dai; i++)
3830                         snd_soc_unregister_dai(dev);
3831
3832         mutex_lock(&client_mutex);
3833         list_del(&codec->list);
3834         mutex_unlock(&client_mutex);
3835
3836         pr_debug("Unregistered codec '%s'\n", codec->name);
3837
3838         snd_soc_cache_exit(codec);
3839         kfree(codec->reg_def_copy);
3840         kfree(codec->name);
3841         kfree(codec);
3842 }
3843 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3844
3845 static int __init snd_soc_init(void)
3846 {
3847 #ifdef CONFIG_DEBUG_FS
3848         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3849         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3850                 printk(KERN_WARNING
3851                        "ASoC: Failed to create debugfs directory\n");
3852                 snd_soc_debugfs_root = NULL;
3853         }
3854
3855         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3856                                  &codec_list_fops))
3857                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3858
3859         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3860                                  &dai_list_fops))
3861                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3862
3863         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3864                                  &platform_list_fops))
3865                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3866 #endif
3867
3868         snd_soc_util_init();
3869
3870         return platform_driver_register(&soc_driver);
3871 }
3872 module_init(snd_soc_init);
3873
3874 static void __exit snd_soc_exit(void)
3875 {
3876         snd_soc_util_exit();
3877
3878 #ifdef CONFIG_DEBUG_FS
3879         debugfs_remove_recursive(snd_soc_debugfs_root);
3880 #endif
3881         platform_driver_unregister(&soc_driver);
3882 }
3883 module_exit(snd_soc_exit);
3884
3885 /* Module information */
3886 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3887 MODULE_DESCRIPTION("ALSA SoC Core");
3888 MODULE_LICENSE("GPL");
3889 MODULE_ALIAS("platform:soc-audio");