sound/soc/soc-core.c

   1 /*
   2  * soc-core.c  --  ALSA SoC Audio Layer
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright (C) 2010 Slimlogic Ltd.
   7  * Copyright (C) 2010 Texas Instruments Inc.
   8  *
   9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
  10  *         with code, comments and ideas from :-
  11  *         Richard Purdie <richard@openedhand.com>
  12  *
  13  *  This program is free software; you can redistribute  it and/or modify it
  14  *  under  the terms of  the GNU General  Public License as published by the
  15  *  Free Software Foundation;  either version 2 of the  License, or (at your
  16  *  option) any later version.
  17  *
  18  *  TODO:
  19  *   o Add hw rules to enforce rates, etc.
  20  *   o More testing with other codecs/machines.
  21  *   o Add more codecs and platforms to ensure good API coverage.
  22  *   o Support TDM on PCM and I2S
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/bitops.h>
  31 #include <linux/debugfs.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/slab.h>
  34 #include <sound/ac97_codec.h>
  35 #include <sound/core.h>
  36 #include <sound/jack.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include <sound/soc.h>
  40 #include <sound/initval.h>
  41
  42 #define CREATE_TRACE_POINTS
  43 #include <trace/events/asoc.h>
  44
  45 #define NAME_SIZE       32
  46
  47 static DEFINE_MUTEX(pcm_mutex);
  48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
  49
  50 #ifdef CONFIG_DEBUG_FS
  51 struct dentry *snd_soc_debugfs_root;
  52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
  53 #endif
  54
  55 static DEFINE_MUTEX(client_mutex);
  56 static LIST_HEAD(card_list);
  57 static LIST_HEAD(dai_list);
  58 static LIST_HEAD(platform_list);
  59 static LIST_HEAD(codec_list);
  60
  61 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
  62
  63 /*
  64  * This is a timeout to do a DAPM powerdown after a stream is closed().
  65  * It can be used to eliminate pops between different playback streams, e.g.
  66  * between two audio tracks.
  67  */
  68 static int pmdown_time = 5000;
  69 module_param(pmdown_time, int, 0);
  70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  71
  72 /* returns the minimum number of bytes needed to represent
  73  * a particular given value */
  74 static int min_bytes_needed(unsigned long val)
  75 {
  76         int c = 0;
  77         int i;
  78
  79         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
  80                 if (val & (1UL << i))
  81                         break;
  82         c = (sizeof val * 8) - c;
  83         if (!c || (c % 8))
  84                 c = (c + 8) / 8;
  85         else
  86                 c /= 8;
  87         return c;
  88 }
  89
  90 /* fill buf which is 'len' bytes with a formatted
  91  * string of the form 'reg: value\n' */
  92 static int format_register_str(struct snd_soc_codec *codec,
  93                                unsigned int reg, char *buf, size_t len)
  94 {
  95         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
  96         int regsize = codec->driver->reg_word_size * 2;
  97         int ret;
  98         char tmpbuf[len + 1];
  99         char regbuf[regsize + 1];
 100
 101         /* since tmpbuf is allocated on the stack, warn the callers if they
 102          * try to abuse this function */
 103         WARN_ON(len > 63);
 104
 105         /* +2 for ': ' and + 1 for '\n' */
 106         if (wordsize + regsize + 2 + 1 != len)
 107                 return -EINVAL;
 108
 109         ret = snd_soc_read(codec , reg);
 110         if (ret < 0) {
 111                 memset(regbuf, 'X', regsize);
 112                 regbuf[regsize] = '\0';
 113         } else {
 114                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
 115         }
 116
 117         /* prepare the buffer */
 118         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
 119         /* copy it back to the caller without the '\0' */
 120         memcpy(buf, tmpbuf, len);
 121
 122         return 0;
 123 }
 124
 125 /* codec register dump */
 126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
 127                                   size_t count, loff_t pos)
 128 {
 129         int i, step = 1;
 130         int wordsize, regsize;
 131         int len;
 132         size_t total = 0;
 133         loff_t p = 0;
 134
 135         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 136         regsize = codec->driver->reg_word_size * 2;
 137
 138         len = wordsize + regsize + 2 + 1;
 139
 140         if (!codec->driver->reg_cache_size)
 141                 return 0;
 142
 143         if (codec->driver->reg_cache_step)
 144                 step = codec->driver->reg_cache_step;
 145
 146         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 147                 if (codec->readable_register && !codec->readable_register(codec, i))
 148                         continue;
 149                 if (codec->driver->display_register) {
 150                         count += codec->driver->display_register(codec, buf + count,
 151                                                          PAGE_SIZE - count, i);
 152                 } else {
 153                         /* only support larger than PAGE_SIZE bytes debugfs
 154                          * entries for the default case */
 155                         if (p >= pos) {
 156                                 if (total + len >= count - 1)
 157                                         break;
 158                                 format_register_str(codec, i, buf + total, len);
 159                                 total += len;
 160                         }
 161                         p += len;
 162                 }
 163         }
 164
 165         total = min(total, count - 1);
 166
 167         return total;
 168 }
 169
 170 static ssize_t codec_reg_show(struct device *dev,
 171         struct device_attribute *attr, char *buf)
 172 {
 173         struct snd_soc_pcm_runtime *rtd =
 174                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 175
 176         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 177 }
 178
 179 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 180
 181 static ssize_t pmdown_time_show(struct device *dev,
 182                                 struct device_attribute *attr, char *buf)
 183 {
 184         struct snd_soc_pcm_runtime *rtd =
 185                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 186
 187         return sprintf(buf, "%ld\n", rtd->pmdown_time);
 188 }
 189
 190 static ssize_t pmdown_time_set(struct device *dev,
 191                                struct device_attribute *attr,
 192                                const char *buf, size_t count)
 193 {
 194         struct snd_soc_pcm_runtime *rtd =
 195                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 196         int ret;
 197
 198         ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 199         if (ret)
 200                 return ret;
 201
 202         return count;
 203 }
 204
 205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 206
 207 #ifdef CONFIG_DEBUG_FS
 208 static int codec_reg_open_file(struct inode *inode, struct file *file)
 209 {
 210         file->private_data = inode->i_private;
 211         return 0;
 212 }
 213
 214 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 215                                    size_t count, loff_t *ppos)
 216 {
 217         ssize_t ret;
 218         struct snd_soc_codec *codec = file->private_data;
 219         char *buf;
 220
 221         if (*ppos < 0 || !count)
 222                 return -EINVAL;
 223
 224         buf = kmalloc(count, GFP_KERNEL);
 225         if (!buf)
 226                 return -ENOMEM;
 227
 228         ret = soc_codec_reg_show(codec, buf, count, *ppos);
 229         if (ret >= 0) {
 230                 if (copy_to_user(user_buf, buf, ret)) {
 231                         kfree(buf);
 232                         return -EFAULT;
 233                 }
 234                 *ppos += ret;
 235         }
 236
 237         kfree(buf);
 238         return ret;
 239 }
 240
 241 static ssize_t codec_reg_write_file(struct file *file,
 242                 const char __user *user_buf, size_t count, loff_t *ppos)
 243 {
 244         char buf[32];
 245         int buf_size;
 246         char *start = buf;
 247         unsigned long reg, value;
 248         int step = 1;
 249         struct snd_soc_codec *codec = file->private_data;
 250
 251         buf_size = min(count, (sizeof(buf)-1));
 252         if (copy_from_user(buf, user_buf, buf_size))
 253                 return -EFAULT;
 254         buf[buf_size] = 0;
 255
 256         if (codec->driver->reg_cache_step)
 257                 step = codec->driver->reg_cache_step;
 258
 259         while (*start == ' ')
 260                 start++;
 261         reg = simple_strtoul(start, &start, 16);
 262         while (*start == ' ')
 263                 start++;
 264         if (strict_strtoul(start, 16, &value))
 265                 return -EINVAL;
 266
 267         /* Userspace has been fiddling around behind the kernel's back */
 268         add_taint(TAINT_USER);
 269
 270         snd_soc_write(codec, reg, value);
 271         return buf_size;
 272 }
 273
 274 static const struct file_operations codec_reg_fops = {
 275         .open = codec_reg_open_file,
 276         .read = codec_reg_read_file,
 277         .write = codec_reg_write_file,
 278         .llseek = default_llseek,
 279 };
 280
 281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 282 {
 283         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 284
 285         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 286                                                        debugfs_card_root);
 287         if (!codec->debugfs_codec_root) {
 288                 printk(KERN_WARNING
 289                        "ASoC: Failed to create codec debugfs directory\n");
 290                 return;
 291         }
 292
 293         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
 294                             &codec->cache_sync);
 295         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
 296                             &codec->cache_only);
 297
 298         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 299                                                  codec->debugfs_codec_root,
 300                                                  codec, &codec_reg_fops);
 301         if (!codec->debugfs_reg)
 302                 printk(KERN_WARNING
 303                        "ASoC: Failed to create codec register debugfs file\n");
 304
 305         snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
 306 }
 307
 308 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 309 {
 310         debugfs_remove_recursive(codec->debugfs_codec_root);
 311 }
 312
 313 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 314                                     size_t count, loff_t *ppos)
 315 {
 316         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 317         ssize_t len, ret = 0;
 318         struct snd_soc_codec *codec;
 319
 320         if (!buf)
 321                 return -ENOMEM;
 322
 323         list_for_each_entry(codec, &codec_list, list) {
 324                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 325                                codec->name);
 326                 if (len >= 0)
 327                         ret += len;
 328                 if (ret > PAGE_SIZE) {
 329                         ret = PAGE_SIZE;
 330                         break;
 331                 }
 332         }
 333
 334         if (ret >= 0)
 335                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 336
 337         kfree(buf);
 338
 339         return ret;
 340 }
 341
 342 static const struct file_operations codec_list_fops = {
 343         .read = codec_list_read_file,
 344         .llseek = default_llseek,/* read accesses f_pos */
 345 };
 346
 347 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 348                                   size_t count, loff_t *ppos)
 349 {
 350         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 351         ssize_t len, ret = 0;
 352         struct snd_soc_dai *dai;
 353
 354         if (!buf)
 355                 return -ENOMEM;
 356
 357         list_for_each_entry(dai, &dai_list, list) {
 358                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 359                 if (len >= 0)
 360                         ret += len;
 361                 if (ret > PAGE_SIZE) {
 362                         ret = PAGE_SIZE;
 363                         break;
 364                 }
 365         }
 366
 367         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 368
 369         kfree(buf);
 370
 371         return ret;
 372 }
 373
 374 static const struct file_operations dai_list_fops = {
 375         .read = dai_list_read_file,
 376         .llseek = default_llseek,/* read accesses f_pos */
 377 };
 378
 379 static ssize_t platform_list_read_file(struct file *file,
 380                                        char __user *user_buf,
 381                                        size_t count, loff_t *ppos)
 382 {
 383         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 384         ssize_t len, ret = 0;
 385         struct snd_soc_platform *platform;
 386
 387         if (!buf)
 388                 return -ENOMEM;
 389
 390         list_for_each_entry(platform, &platform_list, list) {
 391                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 392                                platform->name);
 393                 if (len >= 0)
 394                         ret += len;
 395                 if (ret > PAGE_SIZE) {
 396                         ret = PAGE_SIZE;
 397                         break;
 398                 }
 399         }
 400
 401         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 402
 403         kfree(buf);
 404
 405         return ret;
 406 }
 407
 408 static const struct file_operations platform_list_fops = {
 409         .read = platform_list_read_file,
 410         .llseek = default_llseek,/* read accesses f_pos */
 411 };
 412
 413 static void soc_init_card_debugfs(struct snd_soc_card *card)
 414 {
 415         card->debugfs_card_root = debugfs_create_dir(card->name,
 416                                                      snd_soc_debugfs_root);
 417         if (!card->debugfs_card_root) {
 418                 dev_warn(card->dev,
 419                          "ASoC: Failed to create codec debugfs directory\n");
 420                 return;
 421         }
 422
 423         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 424                                                     card->debugfs_card_root,
 425                                                     &card->pop_time);
 426         if (!card->debugfs_pop_time)
 427                 dev_warn(card->dev,
 428                        "Failed to create pop time debugfs file\n");
 429 }
 430
 431 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 432 {
 433         debugfs_remove_recursive(card->debugfs_card_root);
 434 }
 435
 436 #else
 437
 438 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 439 {
 440 }
 441
 442 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 443 {
 444 }
 445
 446 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 447 {
 448 }
 449
 450 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 451 {
 452 }
 453 #endif
 454
 455 #ifdef CONFIG_SND_SOC_AC97_BUS
 456 /* unregister ac97 codec */
 457 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 458 {
 459         if (codec->ac97->dev.bus)
 460                 device_unregister(&codec->ac97->dev);
 461         return 0;
 462 }
 463
 464 /* stop no dev release warning */
 465 static void soc_ac97_device_release(struct device *dev){}
 466
 467 /* register ac97 codec to bus */
 468 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 469 {
 470         int err;
 471
 472         codec->ac97->dev.bus = &ac97_bus_type;
 473         codec->ac97->dev.parent = codec->card->dev;
 474         codec->ac97->dev.release = soc_ac97_device_release;
 475
 476         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 477                      codec->card->snd_card->number, 0, codec->name);
 478         err = device_register(&codec->ac97->dev);
 479         if (err < 0) {
 480                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
 481                 codec->ac97->dev.bus = NULL;
 482                 return err;
 483         }
 484         return 0;
 485 }
 486 #endif
 487
 488 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 489 {
 490         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 491         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 492         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 493         int ret;
 494
 495         if (!codec_dai->driver->symmetric_rates &&
 496             !cpu_dai->driver->symmetric_rates &&
 497             !rtd->dai_link->symmetric_rates)
 498                 return 0;
 499
 500         /* This can happen if multiple streams are starting simultaneously -
 501          * the second can need to get its constraints before the first has
 502          * picked a rate.  Complain and allow the application to carry on.
 503          */
 504         if (!rtd->rate) {
 505                 dev_warn(&rtd->dev,
 506                          "Not enforcing symmetric_rates due to race\n");
 507                 return 0;
 508         }
 509
 510         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
 511
 512         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 513                                            SNDRV_PCM_HW_PARAM_RATE,
 514                                            rtd->rate, rtd->rate);
 515         if (ret < 0) {
 516                 dev_err(&rtd->dev,
 517                         "Unable to apply rate symmetry constraint: %d\n", ret);
 518                 return ret;
 519         }
 520
 521         return 0;
 522 }
 523
 524 /*
 525  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 526  * then initialized and any private data can be allocated. This also calls
 527  * startup for the cpu DAI, platform, machine and codec DAI.
 528  */
 529 static int soc_pcm_open(struct snd_pcm_substream *substream)
 530 {
 531         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 532         struct snd_pcm_runtime *runtime = substream->runtime;
 533         struct snd_soc_platform *platform = rtd->platform;
 534         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 535         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 536         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 537         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 538         int ret = 0;
 539
 540         mutex_lock(&pcm_mutex);
 541
 542         /* startup the audio subsystem */
 543         if (cpu_dai->driver->ops->startup) {
 544                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 545                 if (ret < 0) {
 546                         printk(KERN_ERR "asoc: can't open interface %s\n",
 547                                 cpu_dai->name);
 548                         goto out;
 549                 }
 550         }
 551
 552         if (platform->driver->ops && platform->driver->ops->open) {
 553                 ret = platform->driver->ops->open(substream);
 554                 if (ret < 0) {
 555                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
 556                         goto platform_err;
 557                 }
 558         }
 559
 560         if (codec_dai->driver->ops->startup) {
 561                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 562                 if (ret < 0) {
 563                         printk(KERN_ERR "asoc: can't open codec %s\n",
 564                                 codec_dai->name);
 565                         goto codec_dai_err;
 566                 }
 567         }
 568
 569         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 570                 ret = rtd->dai_link->ops->startup(substream);
 571                 if (ret < 0) {
 572                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
 573                         goto machine_err;
 574                 }
 575         }
 576
 577         /* Check that the codec and cpu DAIs are compatible */
 578         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 579                 runtime->hw.rate_min =
 580                         max(codec_dai_drv->playback.rate_min,
 581                             cpu_dai_drv->playback.rate_min);
 582                 runtime->hw.rate_max =
 583                         min(codec_dai_drv->playback.rate_max,
 584                             cpu_dai_drv->playback.rate_max);
 585                 runtime->hw.channels_min =
 586                         max(codec_dai_drv->playback.channels_min,
 587                                 cpu_dai_drv->playback.channels_min);
 588                 runtime->hw.channels_max =
 589                         min(codec_dai_drv->playback.channels_max,
 590                                 cpu_dai_drv->playback.channels_max);
 591                 runtime->hw.formats =
 592                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 593                 runtime->hw.rates =
 594                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 595                 if (codec_dai_drv->playback.rates
 596                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 597                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 598                 if (cpu_dai_drv->playback.rates
 599                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 600                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 601         } else {
 602                 runtime->hw.rate_min =
 603                         max(codec_dai_drv->capture.rate_min,
 604                             cpu_dai_drv->capture.rate_min);
 605                 runtime->hw.rate_max =
 606                         min(codec_dai_drv->capture.rate_max,
 607                             cpu_dai_drv->capture.rate_max);
 608                 runtime->hw.channels_min =
 609                         max(codec_dai_drv->capture.channels_min,
 610                                 cpu_dai_drv->capture.channels_min);
 611                 runtime->hw.channels_max =
 612                         min(codec_dai_drv->capture.channels_max,
 613                                 cpu_dai_drv->capture.channels_max);
 614                 runtime->hw.formats =
 615                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 616                 runtime->hw.rates =
 617                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 618                 if (codec_dai_drv->capture.rates
 619                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 620                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 621                 if (cpu_dai_drv->capture.rates
 622                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 623                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 624         }
 625
 626         ret = -EINVAL;
 627         snd_pcm_limit_hw_rates(runtime);
 628         if (!runtime->hw.rates) {
 629                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 630                         codec_dai->name, cpu_dai->name);
 631                 goto config_err;
 632         }
 633         if (!runtime->hw.formats) {
 634                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 635                         codec_dai->name, cpu_dai->name);
 636                 goto config_err;
 637         }
 638         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 639             runtime->hw.channels_min > runtime->hw.channels_max) {
 640                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 641                                 codec_dai->name, cpu_dai->name);
 642                 goto config_err;
 643         }
 644
 645         /* Symmetry only applies if we've already got an active stream. */
 646         if (cpu_dai->active || codec_dai->active) {
 647                 ret = soc_pcm_apply_symmetry(substream);
 648                 if (ret != 0)
 649                         goto config_err;
 650         }
 651
 652         pr_debug("asoc: %s <-> %s info:\n",
 653                         codec_dai->name, cpu_dai->name);
 654         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 655         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 656                  runtime->hw.channels_max);
 657         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 658                  runtime->hw.rate_max);
 659
 660         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 661                 cpu_dai->playback_active++;
 662                 codec_dai->playback_active++;
 663         } else {
 664                 cpu_dai->capture_active++;
 665                 codec_dai->capture_active++;
 666         }
 667         cpu_dai->active++;
 668         codec_dai->active++;
 669         rtd->codec->active++;
 670         mutex_unlock(&pcm_mutex);
 671         return 0;
 672
 673 config_err:
 674         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 675                 rtd->dai_link->ops->shutdown(substream);
 676
 677 machine_err:
 678         if (codec_dai->driver->ops->shutdown)
 679                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 680
 681 codec_dai_err:
 682         if (platform->driver->ops && platform->driver->ops->close)
 683                 platform->driver->ops->close(substream);
 684
 685 platform_err:
 686         if (cpu_dai->driver->ops->shutdown)
 687                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 688 out:
 689         mutex_unlock(&pcm_mutex);
 690         return ret;
 691 }
 692
 693 /*
 694  * Power down the audio subsystem pmdown_time msecs after close is called.
 695  * This is to ensure there are no pops or clicks in between any music tracks
 696  * due to DAPM power cycling.
 697  */
 698 static void close_delayed_work(struct work_struct *work)
 699 {
 700         struct snd_soc_pcm_runtime *rtd =
 701                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 702         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 703
 704         mutex_lock(&pcm_mutex);
 705
 706         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 707                  codec_dai->driver->playback.stream_name,
 708                  codec_dai->playback_active ? "active" : "inactive",
 709                  codec_dai->pop_wait ? "yes" : "no");
 710
 711         /* are we waiting on this codec DAI stream */
 712         if (codec_dai->pop_wait == 1) {
 713                 codec_dai->pop_wait = 0;
 714                 snd_soc_dapm_stream_event(rtd,
 715                         codec_dai->driver->playback.stream_name,
 716                         SND_SOC_DAPM_STREAM_STOP);
 717         }
 718
 719         mutex_unlock(&pcm_mutex);
 720 }
 721
 722 /*
 723  * Called by ALSA when a PCM substream is closed. Private data can be
 724  * freed here. The cpu DAI, codec DAI, machine and platform are also
 725  * shutdown.
 726  */
 727 static int soc_codec_close(struct snd_pcm_substream *substream)
 728 {
 729         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 730         struct snd_soc_platform *platform = rtd->platform;
 731         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 732         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 733         struct snd_soc_codec *codec = rtd->codec;
 734
 735         mutex_lock(&pcm_mutex);
 736
 737         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 738                 cpu_dai->playback_active--;
 739                 codec_dai->playback_active--;
 740         } else {
 741                 cpu_dai->capture_active--;
 742                 codec_dai->capture_active--;
 743         }
 744
 745         cpu_dai->active--;
 746         codec_dai->active--;
 747         codec->active--;
 748
 749         /* Muting the DAC suppresses artifacts caused during digital
 750          * shutdown, for example from stopping clocks.
 751          */
 752         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 753                 snd_soc_dai_digital_mute(codec_dai, 1);
 754
 755         if (cpu_dai->driver->ops->shutdown)
 756                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 757
 758         if (codec_dai->driver->ops->shutdown)
 759                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 760
 761         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 762                 rtd->dai_link->ops->shutdown(substream);
 763
 764         if (platform->driver->ops && platform->driver->ops->close)
 765                 platform->driver->ops->close(substream);
 766         cpu_dai->runtime = NULL;
 767
 768         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 769                 /* start delayed pop wq here for playback streams */
 770                 codec_dai->pop_wait = 1;
 771                 schedule_delayed_work(&rtd->delayed_work,
 772                         msecs_to_jiffies(rtd->pmdown_time));
 773         } else {
 774                 /* capture streams can be powered down now */
 775                 snd_soc_dapm_stream_event(rtd,
 776                         codec_dai->driver->capture.stream_name,
 777                         SND_SOC_DAPM_STREAM_STOP);
 778         }
 779
 780         mutex_unlock(&pcm_mutex);
 781         return 0;
 782 }
 783
 784 /*
 785  * Called by ALSA when the PCM substream is prepared, can set format, sample
 786  * rate, etc.  This function is non atomic and can be called multiple times,
 787  * it can refer to the runtime info.
 788  */
 789 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 790 {
 791         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 792         struct snd_soc_platform *platform = rtd->platform;
 793         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 794         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 795         int ret = 0;
 796
 797         mutex_lock(&pcm_mutex);
 798
 799         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 800                 ret = rtd->dai_link->ops->prepare(substream);
 801                 if (ret < 0) {
 802                         printk(KERN_ERR "asoc: machine prepare error\n");
 803                         goto out;
 804                 }
 805         }
 806
 807         if (platform->driver->ops && platform->driver->ops->prepare) {
 808                 ret = platform->driver->ops->prepare(substream);
 809                 if (ret < 0) {
 810                         printk(KERN_ERR "asoc: platform prepare error\n");
 811                         goto out;
 812                 }
 813         }
 814
 815         if (codec_dai->driver->ops->prepare) {
 816                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 817                 if (ret < 0) {
 818                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
 819                         goto out;
 820                 }
 821         }
 822
 823         if (cpu_dai->driver->ops->prepare) {
 824                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 825                 if (ret < 0) {
 826                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
 827                         goto out;
 828                 }
 829         }
 830
 831         /* cancel any delayed stream shutdown that is pending */
 832         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 833             codec_dai->pop_wait) {
 834                 codec_dai->pop_wait = 0;
 835                 cancel_delayed_work(&rtd->delayed_work);
 836         }
 837
 838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 839                 snd_soc_dapm_stream_event(rtd,
 840                                           codec_dai->driver->playback.stream_name,
 841                                           SND_SOC_DAPM_STREAM_START);
 842         else
 843                 snd_soc_dapm_stream_event(rtd,
 844                                           codec_dai->driver->capture.stream_name,
 845                                           SND_SOC_DAPM_STREAM_START);
 846
 847         snd_soc_dai_digital_mute(codec_dai, 0);
 848
 849 out:
 850         mutex_unlock(&pcm_mutex);
 851         return ret;
 852 }
 853
 854 /*
 855  * Called by ALSA when the hardware params are set by application. This
 856  * function can also be called multiple times and can allocate buffers
 857  * (using snd_pcm_lib_* ). It's non-atomic.
 858  */
 859 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 860                                 struct snd_pcm_hw_params *params)
 861 {
 862         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 863         struct snd_soc_platform *platform = rtd->platform;
 864         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 865         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 866         int ret = 0;
 867
 868         mutex_lock(&pcm_mutex);
 869
 870         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 871                 ret = rtd->dai_link->ops->hw_params(substream, params);
 872                 if (ret < 0) {
 873                         printk(KERN_ERR "asoc: machine hw_params failed\n");
 874                         goto out;
 875                 }
 876         }
 877
 878         if (codec_dai->driver->ops->hw_params) {
 879                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 880                 if (ret < 0) {
 881                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
 882                                 codec_dai->name);
 883                         goto codec_err;
 884                 }
 885         }
 886
 887         if (cpu_dai->driver->ops->hw_params) {
 888                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 889                 if (ret < 0) {
 890                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
 891                                 cpu_dai->name);
 892                         goto interface_err;
 893                 }
 894         }
 895
 896         if (platform->driver->ops && platform->driver->ops->hw_params) {
 897                 ret = platform->driver->ops->hw_params(substream, params);
 898                 if (ret < 0) {
 899                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
 900                                 platform->name);
 901                         goto platform_err;
 902                 }
 903         }
 904
 905         rtd->rate = params_rate(params);
 906
 907 out:
 908         mutex_unlock(&pcm_mutex);
 909         return ret;
 910
 911 platform_err:
 912         if (cpu_dai->driver->ops->hw_free)
 913                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 914
 915 interface_err:
 916         if (codec_dai->driver->ops->hw_free)
 917                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 918
 919 codec_err:
 920         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 921                 rtd->dai_link->ops->hw_free(substream);
 922
 923         mutex_unlock(&pcm_mutex);
 924         return ret;
 925 }
 926
 927 /*
 928  * Frees resources allocated by hw_params, can be called multiple times
 929  */
 930 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 931 {
 932         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 933         struct snd_soc_platform *platform = rtd->platform;
 934         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 935         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 936         struct snd_soc_codec *codec = rtd->codec;
 937
 938         mutex_lock(&pcm_mutex);
 939
 940         /* apply codec digital mute */
 941         if (!codec->active)
 942                 snd_soc_dai_digital_mute(codec_dai, 1);
 943
 944         /* free any machine hw params */
 945         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 946                 rtd->dai_link->ops->hw_free(substream);
 947
 948         /* free any DMA resources */
 949         if (platform->driver->ops && platform->driver->ops->hw_free)
 950                 platform->driver->ops->hw_free(substream);
 951
 952         /* now free hw params for the DAIs  */
 953         if (codec_dai->driver->ops->hw_free)
 954                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 955
 956         if (cpu_dai->driver->ops->hw_free)
 957                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 958
 959         mutex_unlock(&pcm_mutex);
 960         return 0;
 961 }
 962
 963 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 964 {
 965         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 966         struct snd_soc_platform *platform = rtd->platform;
 967         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 968         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 969         int ret;
 970
 971         if (codec_dai->driver->ops->trigger) {
 972                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 973                 if (ret < 0)
 974                         return ret;
 975         }
 976
 977         if (platform->driver->ops && platform->driver->ops->trigger) {
 978                 ret = platform->driver->ops->trigger(substream, cmd);
 979                 if (ret < 0)
 980                         return ret;
 981         }
 982
 983         if (cpu_dai->driver->ops->trigger) {
 984                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 985                 if (ret < 0)
 986                         return ret;
 987         }
 988         return 0;
 989 }
 990
 991 /*
 992  * soc level wrapper for pointer callback
 993  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 994  * the runtime->delay will be updated accordingly.
 995  */
 996 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 997 {
 998         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 999         struct snd_soc_platform *platform = rtd->platform;
1000         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1002         struct snd_pcm_runtime *runtime = substream->runtime;
1003         snd_pcm_uframes_t offset = 0;
1004         snd_pcm_sframes_t delay = 0;
1005
1006         if (platform->driver->ops && platform->driver->ops->pointer)
1007                 offset = platform->driver->ops->pointer(substream);
1008
1009         if (cpu_dai->driver->ops->delay)
1010                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1011
1012         if (codec_dai->driver->ops->delay)
1013                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1014
1015         if (platform->driver->delay)
1016                 delay += platform->driver->delay(substream, codec_dai);
1017
1018         runtime->delay = delay;
1019
1020         return offset;
1021 }
1022
1023 /* ASoC PCM operations */
1024 static struct snd_pcm_ops soc_pcm_ops = {
1025         .open           = soc_pcm_open,
1026         .close          = soc_codec_close,
1027         .hw_params      = soc_pcm_hw_params,
1028         .hw_free        = soc_pcm_hw_free,
1029         .prepare        = soc_pcm_prepare,
1030         .trigger        = soc_pcm_trigger,
1031         .pointer        = soc_pcm_pointer,
1032 };
1033
1034 #ifdef CONFIG_PM_SLEEP
1035 /* powers down audio subsystem for suspend */
1036 int snd_soc_suspend(struct device *dev)
1037 {
1038         struct snd_soc_card *card = dev_get_drvdata(dev);
1039         struct snd_soc_codec *codec;
1040         int i;
1041
1042         /* If the initialization of this soc device failed, there is no codec
1043          * associated with it. Just bail out in this case.
1044          */
1045         if (list_empty(&card->codec_dev_list))
1046                 return 0;
1047
1048         /* Due to the resume being scheduled into a workqueue we could
1049         * suspend before that's finished - wait for it to complete.
1050          */
1051         snd_power_lock(card->snd_card);
1052         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1053         snd_power_unlock(card->snd_card);
1054
1055         /* we're going to block userspace touching us until resume completes */
1056         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1057
1058         /* mute any active DACs */
1059         for (i = 0; i < card->num_rtd; i++) {
1060                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1061                 struct snd_soc_dai_driver *drv = dai->driver;
1062
1063                 if (card->rtd[i].dai_link->ignore_suspend)
1064                         continue;
1065
1066                 if (drv->ops->digital_mute && dai->playback_active)
1067                         drv->ops->digital_mute(dai, 1);
1068         }
1069
1070         /* suspend all pcms */
1071         for (i = 0; i < card->num_rtd; i++) {
1072                 if (card->rtd[i].dai_link->ignore_suspend)
1073                         continue;
1074
1075                 snd_pcm_suspend_all(card->rtd[i].pcm);
1076         }
1077
1078         if (card->suspend_pre)
1079                 card->suspend_pre(card);
1080
1081         for (i = 0; i < card->num_rtd; i++) {
1082                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1083                 struct snd_soc_platform *platform = card->rtd[i].platform;
1084
1085                 if (card->rtd[i].dai_link->ignore_suspend)
1086                         continue;
1087
1088                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1089                         cpu_dai->driver->suspend(cpu_dai);
1090                 if (platform->driver->suspend && !platform->suspended) {
1091                         platform->driver->suspend(cpu_dai);
1092                         platform->suspended = 1;
1093                 }
1094         }
1095
1096         /* close any waiting streams and save state */
1097         for (i = 0; i < card->num_rtd; i++) {
1098                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1099                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1100         }
1101
1102         for (i = 0; i < card->num_rtd; i++) {
1103                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1104
1105                 if (card->rtd[i].dai_link->ignore_suspend)
1106                         continue;
1107
1108                 if (driver->playback.stream_name != NULL)
1109                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1110                                 SND_SOC_DAPM_STREAM_SUSPEND);
1111
1112                 if (driver->capture.stream_name != NULL)
1113                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1114                                 SND_SOC_DAPM_STREAM_SUSPEND);
1115         }
1116
1117         /* suspend all CODECs */
1118         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1119                 /* If there are paths active then the CODEC will be held with
1120                  * bias _ON and should not be suspended. */
1121                 if (!codec->suspended && codec->driver->suspend) {
1122                         switch (codec->dapm.bias_level) {
1123                         case SND_SOC_BIAS_STANDBY:
1124                         case SND_SOC_BIAS_OFF:
1125                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1126                                 codec->suspended = 1;
1127                                 break;
1128                         default:
1129                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1130                                 break;
1131                         }
1132                 }
1133         }
1134
1135         for (i = 0; i < card->num_rtd; i++) {
1136                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1137
1138                 if (card->rtd[i].dai_link->ignore_suspend)
1139                         continue;
1140
1141                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1142                         cpu_dai->driver->suspend(cpu_dai);
1143         }
1144
1145         if (card->suspend_post)
1146                 card->suspend_post(card);
1147
1148         return 0;
1149 }
1150 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1151
1152 /* deferred resume work, so resume can complete before we finished
1153  * setting our codec back up, which can be very slow on I2C
1154  */
1155 static void soc_resume_deferred(struct work_struct *work)
1156 {
1157         struct snd_soc_card *card =
1158                         container_of(work, struct snd_soc_card, deferred_resume_work);
1159         struct snd_soc_codec *codec;
1160         int i;
1161
1162         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1163          * so userspace apps are blocked from touching us
1164          */
1165
1166         dev_dbg(card->dev, "starting resume work\n");
1167
1168         /* Bring us up into D2 so that DAPM starts enabling things */
1169         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1170
1171         if (card->resume_pre)
1172                 card->resume_pre(card);
1173
1174         /* resume AC97 DAIs */
1175         for (i = 0; i < card->num_rtd; i++) {
1176                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1177
1178                 if (card->rtd[i].dai_link->ignore_suspend)
1179                         continue;
1180
1181                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1182                         cpu_dai->driver->resume(cpu_dai);
1183         }
1184
1185         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1186                 /* If the CODEC was idle over suspend then it will have been
1187                  * left with bias OFF or STANDBY and suspended so we must now
1188                  * resume.  Otherwise the suspend was suppressed.
1189                  */
1190                 if (codec->driver->resume && codec->suspended) {
1191                         switch (codec->dapm.bias_level) {
1192                         case SND_SOC_BIAS_STANDBY:
1193                         case SND_SOC_BIAS_OFF:
1194                                 codec->driver->resume(codec);
1195                                 codec->suspended = 0;
1196                                 break;
1197                         default:
1198                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1199                                 break;
1200                         }
1201                 }
1202         }
1203
1204         for (i = 0; i < card->num_rtd; i++) {
1205                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1206
1207                 if (card->rtd[i].dai_link->ignore_suspend)
1208                         continue;
1209
1210                 if (driver->playback.stream_name != NULL)
1211                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1212                                 SND_SOC_DAPM_STREAM_RESUME);
1213
1214                 if (driver->capture.stream_name != NULL)
1215                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1216                                 SND_SOC_DAPM_STREAM_RESUME);
1217         }
1218
1219         /* unmute any active DACs */
1220         for (i = 0; i < card->num_rtd; i++) {
1221                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1222                 struct snd_soc_dai_driver *drv = dai->driver;
1223
1224                 if (card->rtd[i].dai_link->ignore_suspend)
1225                         continue;
1226
1227                 if (drv->ops->digital_mute && dai->playback_active)
1228                         drv->ops->digital_mute(dai, 0);
1229         }
1230
1231         for (i = 0; i < card->num_rtd; i++) {
1232                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1233                 struct snd_soc_platform *platform = card->rtd[i].platform;
1234
1235                 if (card->rtd[i].dai_link->ignore_suspend)
1236                         continue;
1237
1238                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1239                         cpu_dai->driver->resume(cpu_dai);
1240                 if (platform->driver->resume && platform->suspended) {
1241                         platform->driver->resume(cpu_dai);
1242                         platform->suspended = 0;
1243                 }
1244         }
1245
1246         if (card->resume_post)
1247                 card->resume_post(card);
1248
1249         dev_dbg(card->dev, "resume work completed\n");
1250
1251         /* userspace can access us now we are back as we were before */
1252         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1253 }
1254
1255 /* powers up audio subsystem after a suspend */
1256 int snd_soc_resume(struct device *dev)
1257 {
1258         struct snd_soc_card *card = dev_get_drvdata(dev);
1259         int i;
1260
1261         /* AC97 devices might have other drivers hanging off them so
1262          * need to resume immediately.  Other drivers don't have that
1263          * problem and may take a substantial amount of time to resume
1264          * due to I/O costs and anti-pop so handle them out of line.
1265          */
1266         for (i = 0; i < card->num_rtd; i++) {
1267                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1268                 if (cpu_dai->driver->ac97_control) {
1269                         dev_dbg(dev, "Resuming AC97 immediately\n");
1270                         soc_resume_deferred(&card->deferred_resume_work);
1271                 } else {
1272                         dev_dbg(dev, "Scheduling resume work\n");
1273                         if (!schedule_work(&card->deferred_resume_work))
1274                                 dev_err(dev, "resume work item may be lost\n");
1275                 }
1276         }
1277
1278         return 0;
1279 }
1280 EXPORT_SYMBOL_GPL(snd_soc_resume);
1281 #else
1282 #define snd_soc_suspend NULL
1283 #define snd_soc_resume NULL
1284 #endif
1285
1286 static struct snd_soc_dai_ops null_dai_ops = {
1287 };
1288
1289 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1290 {
1291         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1292         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1293         struct snd_soc_codec *codec;
1294         struct snd_soc_platform *platform;
1295         struct snd_soc_dai *codec_dai, *cpu_dai;
1296         const char *platform_name;
1297
1298         if (rtd->complete)
1299                 return 1;
1300         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1301
1302         /* do we already have the CPU DAI for this link ? */
1303         if (rtd->cpu_dai) {
1304                 goto find_codec;
1305         }
1306         /* no, then find CPU DAI from registered DAIs*/
1307         list_for_each_entry(cpu_dai, &dai_list, list) {
1308                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1309
1310                         if (!try_module_get(cpu_dai->dev->driver->owner))
1311                                 return -ENODEV;
1312
1313                         rtd->cpu_dai = cpu_dai;
1314                         goto find_codec;
1315                 }
1316         }
1317         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1318                         dai_link->cpu_dai_name);
1319
1320 find_codec:
1321         /* do we already have the CODEC for this link ? */
1322         if (rtd->codec) {
1323                 goto find_platform;
1324         }
1325
1326         /* no, then find CODEC from registered CODECs*/
1327         list_for_each_entry(codec, &codec_list, list) {
1328                 if (!strcmp(codec->name, dai_link->codec_name)) {
1329                         rtd->codec = codec;
1330
1331                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1332                         list_for_each_entry(codec_dai, &dai_list, list) {
1333                                 if (codec->dev == codec_dai->dev &&
1334                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1335                                         rtd->codec_dai = codec_dai;
1336                                         goto find_platform;
1337                                 }
1338                         }
1339                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1340                                         dai_link->codec_dai_name);
1341
1342                         goto find_platform;
1343                 }
1344         }
1345         dev_dbg(card->dev, "CODEC %s not registered\n",
1346                         dai_link->codec_name);
1347
1348 find_platform:
1349         /* do we need a platform? */
1350         if (rtd->platform)
1351                 goto out;
1352
1353         /* if there's no platform we match on the empty platform */
1354         platform_name = dai_link->platform_name;
1355         if (!platform_name)
1356                 platform_name = "snd-soc-dummy";
1357
1358         /* no, then find one from the set of registered platforms */
1359         list_for_each_entry(platform, &platform_list, list) {
1360                 if (!strcmp(platform->name, platform_name)) {
1361                         rtd->platform = platform;
1362                         goto out;
1363                 }
1364         }
1365
1366         dev_dbg(card->dev, "platform %s not registered\n",
1367                         dai_link->platform_name);
1368         return 0;
1369
1370 out:
1371         /* mark rtd as complete if we found all 4 of our client devices */
1372         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1373                 rtd->complete = 1;
1374                 card->num_rtd++;
1375         }
1376         return 1;
1377 }
1378
1379 static void soc_remove_codec(struct snd_soc_codec *codec)
1380 {
1381         int err;
1382
1383         if (codec->driver->remove) {
1384                 err = codec->driver->remove(codec);
1385                 if (err < 0)
1386                         dev_err(codec->dev,
1387                                 "asoc: failed to remove %s: %d\n",
1388                                 codec->name, err);
1389         }
1390
1391         /* Make sure all DAPM widgets are freed */
1392         snd_soc_dapm_free(&codec->dapm);
1393
1394         soc_cleanup_codec_debugfs(codec);
1395         codec->probed = 0;
1396         list_del(&codec->card_list);
1397         module_put(codec->dev->driver->owner);
1398 }
1399
1400 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1401 {
1402         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1403         struct snd_soc_codec *codec = rtd->codec;
1404         struct snd_soc_platform *platform = rtd->platform;
1405         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1406         int err;
1407
1408         /* unregister the rtd device */
1409         if (rtd->dev_registered) {
1410                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1411                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1412                 device_unregister(&rtd->dev);
1413                 rtd->dev_registered = 0;
1414         }
1415
1416         /* remove the CODEC DAI */
1417         if (codec_dai && codec_dai->probed) {
1418                 if (codec_dai->driver->remove) {
1419                         err = codec_dai->driver->remove(codec_dai);
1420                         if (err < 0)
1421                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1422                 }
1423                 codec_dai->probed = 0;
1424                 list_del(&codec_dai->card_list);
1425         }
1426
1427         /* remove the platform */
1428         if (platform && platform->probed) {
1429                 if (platform->driver->remove) {
1430                         err = platform->driver->remove(platform);
1431                         if (err < 0)
1432                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1433                 }
1434                 platform->probed = 0;
1435                 list_del(&platform->card_list);
1436                 module_put(platform->dev->driver->owner);
1437         }
1438
1439         /* remove the CODEC */
1440         if (codec && codec->probed)
1441                 soc_remove_codec(codec);
1442
1443         /* remove the cpu_dai */
1444         if (cpu_dai && cpu_dai->probed) {
1445                 if (cpu_dai->driver->remove) {
1446                         err = cpu_dai->driver->remove(cpu_dai);
1447                         if (err < 0)
1448                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1449                 }
1450                 cpu_dai->probed = 0;
1451                 list_del(&cpu_dai->card_list);
1452                 module_put(cpu_dai->dev->driver->owner);
1453         }
1454 }
1455
1456 static void soc_remove_dai_links(struct snd_soc_card *card)
1457 {
1458         int i;
1459
1460         for (i = 0; i < card->num_rtd; i++)
1461                 soc_remove_dai_link(card, i);
1462
1463         card->num_rtd = 0;
1464 }
1465
1466 static void soc_set_name_prefix(struct snd_soc_card *card,
1467                                 struct snd_soc_codec *codec)
1468 {
1469         int i;
1470
1471         if (card->codec_conf == NULL)
1472                 return;
1473
1474         for (i = 0; i < card->num_configs; i++) {
1475                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1476                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1477                         codec->name_prefix = map->name_prefix;
1478                         break;
1479                 }
1480         }
1481 }
1482
1483 static int soc_probe_codec(struct snd_soc_card *card,
1484                            struct snd_soc_codec *codec)
1485 {
1486         int ret = 0;
1487         const struct snd_soc_codec_driver *driver = codec->driver;
1488
1489         codec->card = card;
1490         codec->dapm.card = card;
1491         soc_set_name_prefix(card, codec);
1492
1493         if (!try_module_get(codec->dev->driver->owner))
1494                 return -ENODEV;
1495
1496         soc_init_codec_debugfs(codec);
1497
1498         if (driver->dapm_widgets)
1499                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1500                                           driver->num_dapm_widgets);
1501
1502         if (driver->probe) {
1503                 ret = driver->probe(codec);
1504                 if (ret < 0) {
1505                         dev_err(codec->dev,
1506                                 "asoc: failed to probe CODEC %s: %d\n",
1507                                 codec->name, ret);
1508                         goto err_probe;
1509                 }
1510         }
1511
1512         if (driver->controls)
1513                 snd_soc_add_controls(codec, driver->controls,
1514                                      driver->num_controls);
1515         if (driver->dapm_routes)
1516                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1517                                         driver->num_dapm_routes);
1518
1519         /* mark codec as probed and add to card codec list */
1520         codec->probed = 1;
1521         list_add(&codec->card_list, &card->codec_dev_list);
1522         list_add(&codec->dapm.list, &card->dapm_list);
1523
1524         return 0;
1525
1526 err_probe:
1527         soc_cleanup_codec_debugfs(codec);
1528         module_put(codec->dev->driver->owner);
1529
1530         return ret;
1531 }
1532
1533 static void rtd_release(struct device *dev) {}
1534
1535 static int soc_post_component_init(struct snd_soc_card *card,
1536                                    struct snd_soc_codec *codec,
1537                                    int num, int dailess)
1538 {
1539         struct snd_soc_dai_link *dai_link = NULL;
1540         struct snd_soc_aux_dev *aux_dev = NULL;
1541         struct snd_soc_pcm_runtime *rtd;
1542         const char *temp, *name;
1543         int ret = 0;
1544
1545         if (!dailess) {
1546                 dai_link = &card->dai_link[num];
1547                 rtd = &card->rtd[num];
1548                 name = dai_link->name;
1549         } else {
1550                 aux_dev = &card->aux_dev[num];
1551                 rtd = &card->rtd_aux[num];
1552                 name = aux_dev->name;
1553         }
1554         rtd->card = card;
1555
1556         /* machine controls, routes and widgets are not prefixed */
1557         temp = codec->name_prefix;
1558         codec->name_prefix = NULL;
1559
1560         /* do machine specific initialization */
1561         if (!dailess && dai_link->init)
1562                 ret = dai_link->init(rtd);
1563         else if (dailess && aux_dev->init)
1564                 ret = aux_dev->init(&codec->dapm);
1565         if (ret < 0) {
1566                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1567                 return ret;
1568         }
1569         codec->name_prefix = temp;
1570
1571         /* Make sure all DAPM widgets are instantiated */
1572         snd_soc_dapm_new_widgets(&codec->dapm);
1573
1574         /* register the rtd device */
1575         rtd->codec = codec;
1576         rtd->dev.parent = card->dev;
1577         rtd->dev.release = rtd_release;
1578         rtd->dev.init_name = name;
1579         ret = device_register(&rtd->dev);
1580         if (ret < 0) {
1581                 dev_err(card->dev,
1582                         "asoc: failed to register runtime device: %d\n", ret);
1583                 return ret;
1584         }
1585         rtd->dev_registered = 1;
1586
1587         /* add DAPM sysfs entries for this codec */
1588         ret = snd_soc_dapm_sys_add(&rtd->dev);
1589         if (ret < 0)
1590                 dev_err(codec->dev,
1591                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1592                         ret);
1593
1594         /* add codec sysfs entries */
1595         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1596         if (ret < 0)
1597                 dev_err(codec->dev,
1598                         "asoc: failed to add codec sysfs files: %d\n", ret);
1599
1600         return 0;
1601 }
1602
1603 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1604 {
1605         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1606         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1607         struct snd_soc_codec *codec = rtd->codec;
1608         struct snd_soc_platform *platform = rtd->platform;
1609         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1610         int ret;
1611
1612         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1613
1614         /* config components */
1615         codec_dai->codec = codec;
1616         cpu_dai->platform = platform;
1617         codec_dai->card = card;
1618         cpu_dai->card = card;
1619
1620         /* set default power off timeout */
1621         rtd->pmdown_time = pmdown_time;
1622
1623         /* probe the cpu_dai */
1624         if (!cpu_dai->probed) {
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                                 return ret;
1631                         }
1632                 }
1633                 cpu_dai->probed = 1;
1634                 /* mark cpu_dai as probed and add to card cpu_dai list */
1635                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1636         }
1637
1638         /* probe the CODEC */
1639         if (!codec->probed) {
1640                 ret = soc_probe_codec(card, codec);
1641                 if (ret < 0)
1642                         return ret;
1643         }
1644
1645         /* probe the platform */
1646         if (!platform->probed) {
1647                 if (!try_module_get(platform->dev->driver->owner))
1648                         return -ENODEV;
1649
1650                 if (platform->driver->probe) {
1651                         ret = platform->driver->probe(platform);
1652                         if (ret < 0) {
1653                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1654                                                 platform->name);
1655                                 module_put(platform->dev->driver->owner);
1656                                 return ret;
1657                         }
1658                 }
1659                 /* mark platform as probed and add to card platform list */
1660                 platform->probed = 1;
1661                 list_add(&platform->card_list, &card->platform_dev_list);
1662         }
1663
1664         /* probe the CODEC DAI */
1665         if (!codec_dai->probed) {
1666                 if (codec_dai->driver->probe) {
1667                         ret = codec_dai->driver->probe(codec_dai);
1668                         if (ret < 0) {
1669                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1670                                                 codec_dai->name);
1671                                 return ret;
1672                         }
1673                 }
1674
1675                 /* mark cpu_dai as probed and add to card cpu_dai list */
1676                 codec_dai->probed = 1;
1677                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1678         }
1679
1680         /* DAPM dai link stream work */
1681         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1682
1683         ret = soc_post_component_init(card, codec, num, 0);
1684         if (ret)
1685                 return ret;
1686
1687         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1688         if (ret < 0)
1689                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1690
1691         /* create the pcm */
1692         ret = soc_new_pcm(rtd, num);
1693         if (ret < 0) {
1694                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1695                 return ret;
1696         }
1697
1698         /* add platform data for AC97 devices */
1699         if (rtd->codec_dai->driver->ac97_control)
1700                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1701
1702         return 0;
1703 }
1704
1705 #ifdef CONFIG_SND_SOC_AC97_BUS
1706 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1707 {
1708         int ret;
1709
1710         /* Only instantiate AC97 if not already done by the adaptor
1711          * for the generic AC97 subsystem.
1712          */
1713         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1714                 /*
1715                  * It is possible that the AC97 device is already registered to
1716                  * the device subsystem. This happens when the device is created
1717                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1718                  * is the generic AC97 glue but others migh emerge.
1719                  *
1720                  * In those cases we don't try to register the device again.
1721                  */
1722                 if (!rtd->codec->ac97_created)
1723                         return 0;
1724
1725                 ret = soc_ac97_dev_register(rtd->codec);
1726                 if (ret < 0) {
1727                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1728                         return ret;
1729                 }
1730
1731                 rtd->codec->ac97_registered = 1;
1732         }
1733         return 0;
1734 }
1735
1736 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1737 {
1738         if (codec->ac97_registered) {
1739                 soc_ac97_dev_unregister(codec);
1740                 codec->ac97_registered = 0;
1741         }
1742 }
1743 #endif
1744
1745 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1746 {
1747         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1748         struct snd_soc_codec *codec;
1749         int ret = -ENODEV;
1750
1751         /* find CODEC from registered CODECs*/
1752         list_for_each_entry(codec, &codec_list, list) {
1753                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1754                         if (codec->probed) {
1755                                 dev_err(codec->dev,
1756                                         "asoc: codec already probed");
1757                                 ret = -EBUSY;
1758                                 goto out;
1759                         }
1760                         goto found;
1761                 }
1762         }
1763         /* codec not found */
1764         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1765         goto out;
1766
1767 found:
1768         ret = soc_probe_codec(card, codec);
1769         if (ret < 0)
1770                 return ret;
1771
1772         ret = soc_post_component_init(card, codec, num, 1);
1773
1774 out:
1775         return ret;
1776 }
1777
1778 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1779 {
1780         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1781         struct snd_soc_codec *codec = rtd->codec;
1782
1783         /* unregister the rtd device */
1784         if (rtd->dev_registered) {
1785                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1786                 device_unregister(&rtd->dev);
1787                 rtd->dev_registered = 0;
1788         }
1789
1790         if (codec && codec->probed)
1791                 soc_remove_codec(codec);
1792 }
1793
1794 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1795                                     enum snd_soc_compress_type compress_type)
1796 {
1797         int ret;
1798
1799         if (codec->cache_init)
1800                 return 0;
1801
1802         /* override the compress_type if necessary */
1803         if (compress_type && codec->compress_type != compress_type)
1804                 codec->compress_type = compress_type;
1805         ret = snd_soc_cache_init(codec);
1806         if (ret < 0) {
1807                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1808                         ret);
1809                 return ret;
1810         }
1811         codec->cache_init = 1;
1812         return 0;
1813 }
1814
1815 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1816 {
1817         struct snd_soc_codec *codec;
1818         struct snd_soc_codec_conf *codec_conf;
1819         enum snd_soc_compress_type compress_type;
1820         int ret, i;
1821
1822         mutex_lock(&card->mutex);
1823
1824         if (card->instantiated) {
1825                 mutex_unlock(&card->mutex);
1826                 return;
1827         }
1828
1829         /* bind DAIs */
1830         for (i = 0; i < card->num_links; i++)
1831                 soc_bind_dai_link(card, i);
1832
1833         /* bind completed ? */
1834         if (card->num_rtd != card->num_links) {
1835                 mutex_unlock(&card->mutex);
1836                 return;
1837         }
1838
1839         /* initialize the register cache for each available codec */
1840         list_for_each_entry(codec, &codec_list, list) {
1841                 if (codec->cache_init)
1842                         continue;
1843                 /* by default we don't override the compress_type */
1844                 compress_type = 0;
1845                 /* check to see if we need to override the compress_type */
1846                 for (i = 0; i < card->num_configs; ++i) {
1847                         codec_conf = &card->codec_conf[i];
1848                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1849                                 compress_type = codec_conf->compress_type;
1850                                 if (compress_type && compress_type
1851                                     != codec->compress_type)
1852                                         break;
1853                         }
1854                 }
1855                 ret = snd_soc_init_codec_cache(codec, compress_type);
1856                 if (ret < 0) {
1857                         mutex_unlock(&card->mutex);
1858                         return;
1859                 }
1860         }
1861
1862         /* card bind complete so register a sound card */
1863         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1864                         card->owner, 0, &card->snd_card);
1865         if (ret < 0) {
1866                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1867                         card->name);
1868                 mutex_unlock(&card->mutex);
1869                 return;
1870         }
1871         card->snd_card->dev = card->dev;
1872
1873         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1874         card->dapm.dev = card->dev;
1875         card->dapm.card = card;
1876         list_add(&card->dapm.list, &card->dapm_list);
1877
1878 #ifdef CONFIG_DEBUG_FS
1879         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1880 #endif
1881
1882 #ifdef CONFIG_PM_SLEEP
1883         /* deferred resume work */
1884         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1885 #endif
1886
1887         if (card->dapm_widgets)
1888                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1889                                           card->num_dapm_widgets);
1890
1891         /* initialise the sound card only once */
1892         if (card->probe) {
1893                 ret = card->probe(card);
1894                 if (ret < 0)
1895                         goto card_probe_error;
1896         }
1897
1898         for (i = 0; i < card->num_links; i++) {
1899                 ret = soc_probe_dai_link(card, i);
1900                 if (ret < 0) {
1901                         pr_err("asoc: failed to instantiate card %s: %d\n",
1902                                card->name, ret);
1903                         goto probe_dai_err;
1904                 }
1905         }
1906
1907         for (i = 0; i < card->num_aux_devs; i++) {
1908                 ret = soc_probe_aux_dev(card, i);
1909                 if (ret < 0) {
1910                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1911                                card->name, ret);
1912                         goto probe_aux_dev_err;
1913                 }
1914         }
1915
1916         /* We should have a non-codec control add function but we don't */
1917         if (card->controls)
1918                 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1919                                                       struct snd_soc_codec,
1920                                                       card_list),
1921                                      card->controls,
1922                                      card->num_controls);
1923
1924         if (card->dapm_routes)
1925                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1926                                         card->num_dapm_routes);
1927
1928         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1929                  "%s",  card->name);
1930         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1931                  "%s", card->name);
1932
1933         if (card->late_probe) {
1934                 ret = card->late_probe(card);
1935                 if (ret < 0) {
1936                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1937                                 card->name, ret);
1938                         goto probe_aux_dev_err;
1939                 }
1940         }
1941
1942         ret = snd_card_register(card->snd_card);
1943         if (ret < 0) {
1944                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1945                 goto probe_aux_dev_err;
1946         }
1947
1948 #ifdef CONFIG_SND_SOC_AC97_BUS
1949         /* register any AC97 codecs */
1950         for (i = 0; i < card->num_rtd; i++) {
1951                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1952                 if (ret < 0) {
1953                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1954                         while (--i >= 0)
1955                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1956                         goto probe_aux_dev_err;
1957                 }
1958         }
1959 #endif
1960
1961         card->instantiated = 1;
1962         mutex_unlock(&card->mutex);
1963         return;
1964
1965 probe_aux_dev_err:
1966         for (i = 0; i < card->num_aux_devs; i++)
1967                 soc_remove_aux_dev(card, i);
1968
1969 probe_dai_err:
1970         soc_remove_dai_links(card);
1971
1972 card_probe_error:
1973         if (card->remove)
1974                 card->remove(card);
1975
1976         snd_card_free(card->snd_card);
1977
1978         mutex_unlock(&card->mutex);
1979 }
1980
1981 /*
1982  * Attempt to initialise any uninitialised cards.  Must be called with
1983  * client_mutex.
1984  */
1985 static void snd_soc_instantiate_cards(void)
1986 {
1987         struct snd_soc_card *card;
1988         list_for_each_entry(card, &card_list, list)
1989                 snd_soc_instantiate_card(card);
1990 }
1991
1992 /* probes a new socdev */
1993 static int soc_probe(struct platform_device *pdev)
1994 {
1995         struct snd_soc_card *card = platform_get_drvdata(pdev);
1996         int ret = 0;
1997
1998         /*
1999          * no card, so machine driver should be registering card
2000          * we should not be here in that case so ret error
2001          */
2002         if (!card)
2003                 return -EINVAL;
2004
2005         /* Bodge while we unpick instantiation */
2006         card->dev = &pdev->dev;
2007
2008         ret = snd_soc_register_card(card);
2009         if (ret != 0) {
2010                 dev_err(&pdev->dev, "Failed to register card\n");
2011                 return ret;
2012         }
2013
2014         return 0;
2015 }
2016
2017 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2018 {
2019         int i;
2020
2021         /* make sure any delayed work runs */
2022         for (i = 0; i < card->num_rtd; i++) {
2023                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2024                 flush_delayed_work_sync(&rtd->delayed_work);
2025         }
2026
2027         /* remove auxiliary devices */
2028         for (i = 0; i < card->num_aux_devs; i++)
2029                 soc_remove_aux_dev(card, i);
2030
2031         /* remove and free each DAI */
2032         soc_remove_dai_links(card);
2033
2034         soc_cleanup_card_debugfs(card);
2035
2036         /* remove the card */
2037         if (card->remove)
2038                 card->remove(card);
2039
2040         snd_soc_dapm_free(&card->dapm);
2041
2042         kfree(card->rtd);
2043         snd_card_free(card->snd_card);
2044         return 0;
2045
2046 }
2047
2048 /* removes a socdev */
2049 static int soc_remove(struct platform_device *pdev)
2050 {
2051         struct snd_soc_card *card = platform_get_drvdata(pdev);
2052
2053         snd_soc_unregister_card(card);
2054         return 0;
2055 }
2056
2057 int snd_soc_poweroff(struct device *dev)
2058 {
2059         struct snd_soc_card *card = dev_get_drvdata(dev);
2060         int i;
2061
2062         if (!card->instantiated)
2063                 return 0;
2064
2065         /* Flush out pmdown_time work - we actually do want to run it
2066          * now, we're shutting down so no imminent restart. */
2067         for (i = 0; i < card->num_rtd; i++) {
2068                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2069                 flush_delayed_work_sync(&rtd->delayed_work);
2070         }
2071
2072         snd_soc_dapm_shutdown(card);
2073
2074         return 0;
2075 }
2076 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2077
2078 const struct dev_pm_ops snd_soc_pm_ops = {
2079         .suspend = snd_soc_suspend,
2080         .resume = snd_soc_resume,
2081         .poweroff = snd_soc_poweroff,
2082 };
2083 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2084
2085 /* ASoC platform driver */
2086 static struct platform_driver soc_driver = {
2087         .driver         = {
2088                 .name           = "soc-audio",
2089                 .owner          = THIS_MODULE,
2090                 .pm             = &snd_soc_pm_ops,
2091         },
2092         .probe          = soc_probe,
2093         .remove         = soc_remove,
2094 };
2095
2096 /* create a new pcm */
2097 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2098 {
2099         struct snd_soc_codec *codec = rtd->codec;
2100         struct snd_soc_platform *platform = rtd->platform;
2101         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2102         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2103         struct snd_pcm *pcm;
2104         char new_name[64];
2105         int ret = 0, playback = 0, capture = 0;
2106
2107         /* check client and interface hw capabilities */
2108         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2109                         rtd->dai_link->stream_name, codec_dai->name, num);
2110
2111         if (codec_dai->driver->playback.channels_min)
2112                 playback = 1;
2113         if (codec_dai->driver->capture.channels_min)
2114                 capture = 1;
2115
2116         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2117         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2118                         num, playback, capture, &pcm);
2119         if (ret < 0) {
2120                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2121                 return ret;
2122         }
2123
2124         rtd->pcm = pcm;
2125         pcm->private_data = rtd;
2126         if (platform->driver->ops) {
2127                 soc_pcm_ops.mmap = platform->driver->ops->mmap;
2128                 soc_pcm_ops.pointer = platform->driver->ops->pointer;
2129                 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2130                 soc_pcm_ops.copy = platform->driver->ops->copy;
2131                 soc_pcm_ops.silence = platform->driver->ops->silence;
2132                 soc_pcm_ops.ack = platform->driver->ops->ack;
2133                 soc_pcm_ops.page = platform->driver->ops->page;
2134         }
2135
2136         if (playback)
2137                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2138
2139         if (capture)
2140                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2141
2142         if (platform->driver->pcm_new) {
2143                 ret = platform->driver->pcm_new(rtd->card->snd_card,
2144                                                 codec_dai, pcm);
2145                 if (ret < 0) {
2146                         pr_err("asoc: platform pcm constructor failed\n");
2147                         return ret;
2148                 }
2149         }
2150
2151         pcm->private_free = platform->driver->pcm_free;
2152         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2153                 cpu_dai->name);
2154         return ret;
2155 }
2156
2157 /**
2158  * snd_soc_codec_volatile_register: Report if a register is volatile.
2159  *
2160  * @codec: CODEC to query.
2161  * @reg: Register to query.
2162  *
2163  * Boolean function indiciating if a CODEC register is volatile.
2164  */
2165 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2166                                     unsigned int reg)
2167 {
2168         if (codec->volatile_register)
2169                 return codec->volatile_register(codec, reg);
2170         else
2171                 return 0;
2172 }
2173 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2174
2175 /**
2176  * snd_soc_codec_readable_register: Report if a register is readable.
2177  *
2178  * @codec: CODEC to query.
2179  * @reg: Register to query.
2180  *
2181  * Boolean function indicating if a CODEC register is readable.
2182  */
2183 int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
2184                                     unsigned int reg)
2185 {
2186         if (codec->readable_register)
2187                 return codec->readable_register(codec, reg);
2188         else
2189                 return 0;
2190 }
2191 EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
2192
2193 /**
2194  * snd_soc_codec_writable_register: Report if a register is writable.
2195  *
2196  * @codec: CODEC to query.
2197  * @reg: Register to query.
2198  *
2199  * Boolean function indicating if a CODEC register is writable.
2200  */
2201 int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2202                                     unsigned int reg)
2203 {
2204         if (codec->writable_register)
2205                 return codec->writable_register(codec, reg);
2206         else
2207                 return 0;
2208 }
2209 EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2210
2211 /**
2212  * snd_soc_new_ac97_codec - initailise AC97 device
2213  * @codec: audio codec
2214  * @ops: AC97 bus operations
2215  * @num: AC97 codec number
2216  *
2217  * Initialises AC97 codec resources for use by ad-hoc devices only.
2218  */
2219 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2220         struct snd_ac97_bus_ops *ops, int num)
2221 {
2222         mutex_lock(&codec->mutex);
2223
2224         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2225         if (codec->ac97 == NULL) {
2226                 mutex_unlock(&codec->mutex);
2227                 return -ENOMEM;
2228         }
2229
2230         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2231         if (codec->ac97->bus == NULL) {
2232                 kfree(codec->ac97);
2233                 codec->ac97 = NULL;
2234                 mutex_unlock(&codec->mutex);
2235                 return -ENOMEM;
2236         }
2237
2238         codec->ac97->bus->ops = ops;
2239         codec->ac97->num = num;
2240
2241         /*
2242          * Mark the AC97 device to be created by us. This way we ensure that the
2243          * device will be registered with the device subsystem later on.
2244          */
2245         codec->ac97_created = 1;
2246
2247         mutex_unlock(&codec->mutex);
2248         return 0;
2249 }
2250 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2251
2252 /**
2253  * snd_soc_free_ac97_codec - free AC97 codec device
2254  * @codec: audio codec
2255  *
2256  * Frees AC97 codec device resources.
2257  */
2258 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2259 {
2260         mutex_lock(&codec->mutex);
2261 #ifdef CONFIG_SND_SOC_AC97_BUS
2262         soc_unregister_ac97_dai_link(codec);
2263 #endif
2264         kfree(codec->ac97->bus);
2265         kfree(codec->ac97);
2266         codec->ac97 = NULL;
2267         codec->ac97_created = 0;
2268         mutex_unlock(&codec->mutex);
2269 }
2270 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2271
2272 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2273 {
2274         unsigned int ret;
2275
2276         ret = codec->read(codec, reg);
2277         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2278         trace_snd_soc_reg_read(codec, reg, ret);
2279
2280         return ret;
2281 }
2282 EXPORT_SYMBOL_GPL(snd_soc_read);
2283
2284 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2285                            unsigned int reg, unsigned int val)
2286 {
2287         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2288         trace_snd_soc_reg_write(codec, reg, val);
2289         return codec->write(codec, reg, val);
2290 }
2291 EXPORT_SYMBOL_GPL(snd_soc_write);
2292
2293 unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2294                                     unsigned int reg, const void *data, size_t len)
2295 {
2296         return codec->bulk_write_raw(codec, reg, data, len);
2297 }
2298 EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2299
2300 /**
2301  * snd_soc_update_bits - update codec register bits
2302  * @codec: audio codec
2303  * @reg: codec register
2304  * @mask: register mask
2305  * @value: new value
2306  *
2307  * Writes new register value.
2308  *
2309  * Returns 1 for change, 0 for no change, or negative error code.
2310  */
2311 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2312                                 unsigned int mask, unsigned int value)
2313 {
2314         int change;
2315         unsigned int old, new;
2316         int ret;
2317
2318         ret = snd_soc_read(codec, reg);
2319         if (ret < 0)
2320                 return ret;
2321
2322         old = ret;
2323         new = (old & ~mask) | value;
2324         change = old != new;
2325         if (change) {
2326                 ret = snd_soc_write(codec, reg, new);
2327                 if (ret < 0)
2328                         return ret;
2329         }
2330
2331         return change;
2332 }
2333 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2334
2335 /**
2336  * snd_soc_update_bits_locked - update codec register bits
2337  * @codec: audio codec
2338  * @reg: codec register
2339  * @mask: register mask
2340  * @value: new value
2341  *
2342  * Writes new register value, and takes the codec mutex.
2343  *
2344  * Returns 1 for change else 0.
2345  */
2346 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2347                                unsigned short reg, unsigned int mask,
2348                                unsigned int value)
2349 {
2350         int change;
2351
2352         mutex_lock(&codec->mutex);
2353         change = snd_soc_update_bits(codec, reg, mask, value);
2354         mutex_unlock(&codec->mutex);
2355
2356         return change;
2357 }
2358 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2359
2360 /**
2361  * snd_soc_test_bits - test register for change
2362  * @codec: audio codec
2363  * @reg: codec register
2364  * @mask: register mask
2365  * @value: new value
2366  *
2367  * Tests a register with a new value and checks if the new value is
2368  * different from the old value.
2369  *
2370  * Returns 1 for change else 0.
2371  */
2372 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2373                                 unsigned int mask, unsigned int value)
2374 {
2375         int change;
2376         unsigned int old, new;
2377
2378         old = snd_soc_read(codec, reg);
2379         new = (old & ~mask) | value;
2380         change = old != new;
2381
2382         return change;
2383 }
2384 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2385
2386 /**
2387  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2388  * @substream: the pcm substream
2389  * @hw: the hardware parameters
2390  *
2391  * Sets the substream runtime hardware parameters.
2392  */
2393 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2394         const struct snd_pcm_hardware *hw)
2395 {
2396         struct snd_pcm_runtime *runtime = substream->runtime;
2397         runtime->hw.info = hw->info;
2398         runtime->hw.formats = hw->formats;
2399         runtime->hw.period_bytes_min = hw->period_bytes_min;
2400         runtime->hw.period_bytes_max = hw->period_bytes_max;
2401         runtime->hw.periods_min = hw->periods_min;
2402         runtime->hw.periods_max = hw->periods_max;
2403         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2404         runtime->hw.fifo_size = hw->fifo_size;
2405         return 0;
2406 }
2407 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2408
2409 /**
2410  * snd_soc_cnew - create new control
2411  * @_template: control template
2412  * @data: control private data
2413  * @long_name: control long name
2414  * @prefix: control name prefix
2415  *
2416  * Create a new mixer control from a template control.
2417  *
2418  * Returns 0 for success, else error.
2419  */
2420 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2421                                   void *data, char *long_name,
2422                                   const char *prefix)
2423 {
2424         struct snd_kcontrol_new template;
2425         struct snd_kcontrol *kcontrol;
2426         char *name = NULL;
2427         int name_len;
2428
2429         memcpy(&template, _template, sizeof(template));
2430         template.index = 0;
2431
2432         if (!long_name)
2433                 long_name = template.name;
2434
2435         if (prefix) {
2436                 name_len = strlen(long_name) + strlen(prefix) + 2;
2437                 name = kmalloc(name_len, GFP_ATOMIC);
2438                 if (!name)
2439                         return NULL;
2440
2441                 snprintf(name, name_len, "%s %s", prefix, long_name);
2442
2443                 template.name = name;
2444         } else {
2445                 template.name = long_name;
2446         }
2447
2448         kcontrol = snd_ctl_new1(&template, data);
2449
2450         kfree(name);
2451
2452         return kcontrol;
2453 }
2454 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2455
2456 /**
2457  * snd_soc_add_controls - add an array of controls to a codec.
2458  * Convienience function to add a list of controls. Many codecs were
2459  * duplicating this code.
2460  *
2461  * @codec: codec to add controls to
2462  * @controls: array of controls to add
2463  * @num_controls: number of elements in the array
2464  *
2465  * Return 0 for success, else error.
2466  */
2467 int snd_soc_add_controls(struct snd_soc_codec *codec,
2468         const struct snd_kcontrol_new *controls, int num_controls)
2469 {
2470         struct snd_card *card = codec->card->snd_card;
2471         int err, i;
2472
2473         for (i = 0; i < num_controls; i++) {
2474                 const struct snd_kcontrol_new *control = &controls[i];
2475                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2476                                                      control->name,
2477                                                      codec->name_prefix));
2478                 if (err < 0) {
2479                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2480                                 codec->name, control->name, err);
2481                         return err;
2482                 }
2483         }
2484
2485         return 0;
2486 }
2487 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2488
2489 /**
2490  * snd_soc_info_enum_double - enumerated double mixer info callback
2491  * @kcontrol: mixer control
2492  * @uinfo: control element information
2493  *
2494  * Callback to provide information about a double enumerated
2495  * mixer control.
2496  *
2497  * Returns 0 for success.
2498  */
2499 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2500         struct snd_ctl_elem_info *uinfo)
2501 {
2502         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2503
2504         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2505         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2506         uinfo->value.enumerated.items = e->max;
2507
2508         if (uinfo->value.enumerated.item > e->max - 1)
2509                 uinfo->value.enumerated.item = e->max - 1;
2510         strcpy(uinfo->value.enumerated.name,
2511                 e->texts[uinfo->value.enumerated.item]);
2512         return 0;
2513 }
2514 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2515
2516 /**
2517  * snd_soc_get_enum_double - enumerated double mixer get callback
2518  * @kcontrol: mixer control
2519  * @ucontrol: control element information
2520  *
2521  * Callback to get the value of a double enumerated mixer.
2522  *
2523  * Returns 0 for success.
2524  */
2525 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2526         struct snd_ctl_elem_value *ucontrol)
2527 {
2528         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2529         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2530         unsigned int val, bitmask;
2531
2532         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2533                 ;
2534         val = snd_soc_read(codec, e->reg);
2535         ucontrol->value.enumerated.item[0]
2536                 = (val >> e->shift_l) & (bitmask - 1);
2537         if (e->shift_l != e->shift_r)
2538                 ucontrol->value.enumerated.item[1] =
2539                         (val >> e->shift_r) & (bitmask - 1);
2540
2541         return 0;
2542 }
2543 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2544
2545 /**
2546  * snd_soc_put_enum_double - enumerated double mixer put callback
2547  * @kcontrol: mixer control
2548  * @ucontrol: control element information
2549  *
2550  * Callback to set the value of a double enumerated mixer.
2551  *
2552  * Returns 0 for success.
2553  */
2554 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2555         struct snd_ctl_elem_value *ucontrol)
2556 {
2557         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2558         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2559         unsigned int val;
2560         unsigned int mask, bitmask;
2561
2562         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2563                 ;
2564         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2565                 return -EINVAL;
2566         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2567         mask = (bitmask - 1) << e->shift_l;
2568         if (e->shift_l != e->shift_r) {
2569                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2570                         return -EINVAL;
2571                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2572                 mask |= (bitmask - 1) << e->shift_r;
2573         }
2574
2575         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2576 }
2577 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2578
2579 /**
2580  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2581  * @kcontrol: mixer control
2582  * @ucontrol: control element information
2583  *
2584  * Callback to get the value of a double semi enumerated mixer.
2585  *
2586  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2587  * used for handling bitfield coded enumeration for example.
2588  *
2589  * Returns 0 for success.
2590  */
2591 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2592         struct snd_ctl_elem_value *ucontrol)
2593 {
2594         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2595         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2596         unsigned int reg_val, val, mux;
2597
2598         reg_val = snd_soc_read(codec, e->reg);
2599         val = (reg_val >> e->shift_l) & e->mask;
2600         for (mux = 0; mux < e->max; mux++) {
2601                 if (val == e->values[mux])
2602                         break;
2603         }
2604         ucontrol->value.enumerated.item[0] = mux;
2605         if (e->shift_l != e->shift_r) {
2606                 val = (reg_val >> e->shift_r) & e->mask;
2607                 for (mux = 0; mux < e->max; mux++) {
2608                         if (val == e->values[mux])
2609                                 break;
2610                 }
2611                 ucontrol->value.enumerated.item[1] = mux;
2612         }
2613
2614         return 0;
2615 }
2616 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2617
2618 /**
2619  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2620  * @kcontrol: mixer control
2621  * @ucontrol: control element information
2622  *
2623  * Callback to set the value of a double semi enumerated mixer.
2624  *
2625  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2626  * used for handling bitfield coded enumeration for example.
2627  *
2628  * Returns 0 for success.
2629  */
2630 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2631         struct snd_ctl_elem_value *ucontrol)
2632 {
2633         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2634         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2635         unsigned int val;
2636         unsigned int mask;
2637
2638         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2639                 return -EINVAL;
2640         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2641         mask = e->mask << e->shift_l;
2642         if (e->shift_l != e->shift_r) {
2643                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2644                         return -EINVAL;
2645                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2646                 mask |= e->mask << e->shift_r;
2647         }
2648
2649         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2650 }
2651 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2652
2653 /**
2654  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2655  * @kcontrol: mixer control
2656  * @uinfo: control element information
2657  *
2658  * Callback to provide information about an external enumerated
2659  * single mixer.
2660  *
2661  * Returns 0 for success.
2662  */
2663 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2664         struct snd_ctl_elem_info *uinfo)
2665 {
2666         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2667
2668         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2669         uinfo->count = 1;
2670         uinfo->value.enumerated.items = e->max;
2671
2672         if (uinfo->value.enumerated.item > e->max - 1)
2673                 uinfo->value.enumerated.item = e->max - 1;
2674         strcpy(uinfo->value.enumerated.name,
2675                 e->texts[uinfo->value.enumerated.item]);
2676         return 0;
2677 }
2678 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2679
2680 /**
2681  * snd_soc_info_volsw_ext - external single mixer info callback
2682  * @kcontrol: mixer control
2683  * @uinfo: control element information
2684  *
2685  * Callback to provide information about a single external mixer control.
2686  *
2687  * Returns 0 for success.
2688  */
2689 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2690         struct snd_ctl_elem_info *uinfo)
2691 {
2692         int max = kcontrol->private_value;
2693
2694         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2695                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2696         else
2697                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2698
2699         uinfo->count = 1;
2700         uinfo->value.integer.min = 0;
2701         uinfo->value.integer.max = max;
2702         return 0;
2703 }
2704 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2705
2706 /**
2707  * snd_soc_info_volsw - single mixer info callback
2708  * @kcontrol: mixer control
2709  * @uinfo: control element information
2710  *
2711  * Callback to provide information about a single mixer control.
2712  *
2713  * Returns 0 for success.
2714  */
2715 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2716         struct snd_ctl_elem_info *uinfo)
2717 {
2718         struct soc_mixer_control *mc =
2719                 (struct soc_mixer_control *)kcontrol->private_value;
2720         int platform_max;
2721         unsigned int shift = mc->shift;
2722         unsigned int rshift = mc->rshift;
2723
2724         if (!mc->platform_max)
2725                 mc->platform_max = mc->max;
2726         platform_max = mc->platform_max;
2727
2728         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2729                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2730         else
2731                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2732
2733         uinfo->count = shift == rshift ? 1 : 2;
2734         uinfo->value.integer.min = 0;
2735         uinfo->value.integer.max = platform_max;
2736         return 0;
2737 }
2738 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2739
2740 /**
2741  * snd_soc_get_volsw - single mixer get callback
2742  * @kcontrol: mixer control
2743  * @ucontrol: control element information
2744  *
2745  * Callback to get the value of a single mixer control.
2746  *
2747  * Returns 0 for success.
2748  */
2749 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2750         struct snd_ctl_elem_value *ucontrol)
2751 {
2752         struct soc_mixer_control *mc =
2753                 (struct soc_mixer_control *)kcontrol->private_value;
2754         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2755         unsigned int reg = mc->reg;
2756         unsigned int shift = mc->shift;
2757         unsigned int rshift = mc->rshift;
2758         int max = mc->max;
2759         unsigned int mask = (1 << fls(max)) - 1;
2760         unsigned int invert = mc->invert;
2761
2762         ucontrol->value.integer.value[0] =
2763                 (snd_soc_read(codec, reg) >> shift) & mask;
2764         if (shift != rshift)
2765                 ucontrol->value.integer.value[1] =
2766                         (snd_soc_read(codec, reg) >> rshift) & mask;
2767         if (invert) {
2768                 ucontrol->value.integer.value[0] =
2769                         max - ucontrol->value.integer.value[0];
2770                 if (shift != rshift)
2771                         ucontrol->value.integer.value[1] =
2772                                 max - ucontrol->value.integer.value[1];
2773         }
2774
2775         return 0;
2776 }
2777 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2778
2779 /**
2780  * snd_soc_put_volsw - single mixer put callback
2781  * @kcontrol: mixer control
2782  * @ucontrol: control element information
2783  *
2784  * Callback to set the value of a single mixer control.
2785  *
2786  * Returns 0 for success.
2787  */
2788 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2789         struct snd_ctl_elem_value *ucontrol)
2790 {
2791         struct soc_mixer_control *mc =
2792                 (struct soc_mixer_control *)kcontrol->private_value;
2793         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2794         unsigned int reg = mc->reg;
2795         unsigned int shift = mc->shift;
2796         unsigned int rshift = mc->rshift;
2797         int max = mc->max;
2798         unsigned int mask = (1 << fls(max)) - 1;
2799         unsigned int invert = mc->invert;
2800         unsigned int val, val2, val_mask;
2801
2802         val = (ucontrol->value.integer.value[0] & mask);
2803         if (invert)
2804                 val = max - val;
2805         val_mask = mask << shift;
2806         val = val << shift;
2807         if (shift != rshift) {
2808                 val2 = (ucontrol->value.integer.value[1] & mask);
2809                 if (invert)
2810                         val2 = max - val2;
2811                 val_mask |= mask << rshift;
2812                 val |= val2 << rshift;
2813         }
2814         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2815 }
2816 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2817
2818 /**
2819  * snd_soc_info_volsw_2r - double mixer info callback
2820  * @kcontrol: mixer control
2821  * @uinfo: control element information
2822  *
2823  * Callback to provide information about a double mixer control that
2824  * spans 2 codec registers.
2825  *
2826  * Returns 0 for success.
2827  */
2828 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2829         struct snd_ctl_elem_info *uinfo)
2830 {
2831         struct soc_mixer_control *mc =
2832                 (struct soc_mixer_control *)kcontrol->private_value;
2833         int platform_max;
2834
2835         if (!mc->platform_max)
2836                 mc->platform_max = mc->max;
2837         platform_max = mc->platform_max;
2838
2839         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2840                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2841         else
2842                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2843
2844         uinfo->count = 2;
2845         uinfo->value.integer.min = 0;
2846         uinfo->value.integer.max = platform_max;
2847         return 0;
2848 }
2849 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2850
2851 /**
2852  * snd_soc_get_volsw_2r - double mixer get callback
2853  * @kcontrol: mixer control
2854  * @ucontrol: control element information
2855  *
2856  * Callback to get the value of a double mixer control that spans 2 registers.
2857  *
2858  * Returns 0 for success.
2859  */
2860 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2861         struct snd_ctl_elem_value *ucontrol)
2862 {
2863         struct soc_mixer_control *mc =
2864                 (struct soc_mixer_control *)kcontrol->private_value;
2865         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2866         unsigned int reg = mc->reg;
2867         unsigned int reg2 = mc->rreg;
2868         unsigned int shift = mc->shift;
2869         int max = mc->max;
2870         unsigned int mask = (1 << fls(max)) - 1;
2871         unsigned int invert = mc->invert;
2872
2873         ucontrol->value.integer.value[0] =
2874                 (snd_soc_read(codec, reg) >> shift) & mask;
2875         ucontrol->value.integer.value[1] =
2876                 (snd_soc_read(codec, reg2) >> shift) & mask;
2877         if (invert) {
2878                 ucontrol->value.integer.value[0] =
2879                         max - ucontrol->value.integer.value[0];
2880                 ucontrol->value.integer.value[1] =
2881                         max - ucontrol->value.integer.value[1];
2882         }
2883
2884         return 0;
2885 }
2886 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2887
2888 /**
2889  * snd_soc_put_volsw_2r - double mixer set callback
2890  * @kcontrol: mixer control
2891  * @ucontrol: control element information
2892  *
2893  * Callback to set the value of a double mixer control that spans 2 registers.
2894  *
2895  * Returns 0 for success.
2896  */
2897 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2898         struct snd_ctl_elem_value *ucontrol)
2899 {
2900         struct soc_mixer_control *mc =
2901                 (struct soc_mixer_control *)kcontrol->private_value;
2902         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2903         unsigned int reg = mc->reg;
2904         unsigned int reg2 = mc->rreg;
2905         unsigned int shift = mc->shift;
2906         int max = mc->max;
2907         unsigned int mask = (1 << fls(max)) - 1;
2908         unsigned int invert = mc->invert;
2909         int err;
2910         unsigned int val, val2, val_mask;
2911
2912         val_mask = mask << shift;
2913         val = (ucontrol->value.integer.value[0] & mask);
2914         val2 = (ucontrol->value.integer.value[1] & mask);
2915
2916         if (invert) {
2917                 val = max - val;
2918                 val2 = max - val2;
2919         }
2920
2921         val = val << shift;
2922         val2 = val2 << shift;
2923
2924         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2925         if (err < 0)
2926                 return err;
2927
2928         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2929         return err;
2930 }
2931 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2932
2933 /**
2934  * snd_soc_info_volsw_s8 - signed mixer info callback
2935  * @kcontrol: mixer control
2936  * @uinfo: control element information
2937  *
2938  * Callback to provide information about a signed mixer control.
2939  *
2940  * Returns 0 for success.
2941  */
2942 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2943         struct snd_ctl_elem_info *uinfo)
2944 {
2945         struct soc_mixer_control *mc =
2946                 (struct soc_mixer_control *)kcontrol->private_value;
2947         int platform_max;
2948         int min = mc->min;
2949
2950         if (!mc->platform_max)
2951                 mc->platform_max = mc->max;
2952         platform_max = mc->platform_max;
2953
2954         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2955         uinfo->count = 2;
2956         uinfo->value.integer.min = 0;
2957         uinfo->value.integer.max = platform_max - min;
2958         return 0;
2959 }
2960 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2961
2962 /**
2963  * snd_soc_get_volsw_s8 - signed mixer get callback
2964  * @kcontrol: mixer control
2965  * @ucontrol: control element information
2966  *
2967  * Callback to get the value of a signed mixer control.
2968  *
2969  * Returns 0 for success.
2970  */
2971 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2972         struct snd_ctl_elem_value *ucontrol)
2973 {
2974         struct soc_mixer_control *mc =
2975                 (struct soc_mixer_control *)kcontrol->private_value;
2976         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2977         unsigned int reg = mc->reg;
2978         int min = mc->min;
2979         int val = snd_soc_read(codec, reg);
2980
2981         ucontrol->value.integer.value[0] =
2982                 ((signed char)(val & 0xff))-min;
2983         ucontrol->value.integer.value[1] =
2984                 ((signed char)((val >> 8) & 0xff))-min;
2985         return 0;
2986 }
2987 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2988
2989 /**
2990  * snd_soc_put_volsw_sgn - signed mixer put callback
2991  * @kcontrol: mixer control
2992  * @ucontrol: control element information
2993  *
2994  * Callback to set the value of a signed mixer control.
2995  *
2996  * Returns 0 for success.
2997  */
2998 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2999         struct snd_ctl_elem_value *ucontrol)
3000 {
3001         struct soc_mixer_control *mc =
3002                 (struct soc_mixer_control *)kcontrol->private_value;
3003         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3004         unsigned int reg = mc->reg;
3005         int min = mc->min;
3006         unsigned int val;
3007
3008         val = (ucontrol->value.integer.value[0]+min) & 0xff;
3009         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
3010
3011         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3012 }
3013 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
3014
3015 /**
3016  * snd_soc_limit_volume - Set new limit to an existing volume control.
3017  *
3018  * @codec: where to look for the control
3019  * @name: Name of the control
3020  * @max: new maximum limit
3021  *
3022  * Return 0 for success, else error.
3023  */
3024 int snd_soc_limit_volume(struct snd_soc_codec *codec,
3025         const char *name, int max)
3026 {
3027         struct snd_card *card = codec->card->snd_card;
3028         struct snd_kcontrol *kctl;
3029         struct soc_mixer_control *mc;
3030         int found = 0;
3031         int ret = -EINVAL;
3032
3033         /* Sanity check for name and max */
3034         if (unlikely(!name || max <= 0))
3035                 return -EINVAL;
3036
3037         list_for_each_entry(kctl, &card->controls, list) {
3038                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3039                         found = 1;
3040                         break;
3041                 }
3042         }
3043         if (found) {
3044                 mc = (struct soc_mixer_control *)kctl->private_value;
3045                 if (max <= mc->max) {
3046                         mc->platform_max = max;
3047                         ret = 0;
3048                 }
3049         }
3050         return ret;
3051 }
3052 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3053
3054 /**
3055  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
3056  *  mixer info callback
3057  * @kcontrol: mixer control
3058  * @uinfo: control element information
3059  *
3060  * Returns 0 for success.
3061  */
3062 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3063                         struct snd_ctl_elem_info *uinfo)
3064 {
3065         struct soc_mixer_control *mc =
3066                 (struct soc_mixer_control *)kcontrol->private_value;
3067         int max = mc->max;
3068         int min = mc->min;
3069
3070         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3071         uinfo->count = 2;
3072         uinfo->value.integer.min = 0;
3073         uinfo->value.integer.max = max-min;
3074
3075         return 0;
3076 }
3077 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3078
3079 /**
3080  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3081  *  mixer get callback
3082  * @kcontrol: mixer control
3083  * @uinfo: control element information
3084  *
3085  * Returns 0 for success.
3086  */
3087 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3088                         struct snd_ctl_elem_value *ucontrol)
3089 {
3090         struct soc_mixer_control *mc =
3091                 (struct soc_mixer_control *)kcontrol->private_value;
3092         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3093         unsigned int mask = (1<<mc->shift)-1;
3094         int min = mc->min;
3095         int val = snd_soc_read(codec, mc->reg) & mask;
3096         int valr = snd_soc_read(codec, mc->rreg) & mask;
3097
3098         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3099         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3100         return 0;
3101 }
3102 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3103
3104 /**
3105  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3106  *  mixer put callback
3107  * @kcontrol: mixer control
3108  * @uinfo: control element information
3109  *
3110  * Returns 0 for success.
3111  */
3112 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3113                         struct snd_ctl_elem_value *ucontrol)
3114 {
3115         struct soc_mixer_control *mc =
3116                 (struct soc_mixer_control *)kcontrol->private_value;
3117         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3118         unsigned int mask = (1<<mc->shift)-1;
3119         int min = mc->min;
3120         int ret;
3121         unsigned int val, valr, oval, ovalr;
3122
3123         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3124         val &= mask;
3125         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3126         valr &= mask;
3127
3128         oval = snd_soc_read(codec, mc->reg) & mask;
3129         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3130
3131         ret = 0;
3132         if (oval != val) {
3133                 ret = snd_soc_write(codec, mc->reg, val);
3134                 if (ret < 0)
3135                         return ret;
3136         }
3137         if (ovalr != valr) {
3138                 ret = snd_soc_write(codec, mc->rreg, valr);
3139                 if (ret < 0)
3140                         return ret;
3141         }
3142
3143         return 0;
3144 }
3145 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3146
3147 /**
3148  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3149  * @dai: DAI
3150  * @clk_id: DAI specific clock ID
3151  * @freq: new clock frequency in Hz
3152  * @dir: new clock direction - input/output.
3153  *
3154  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3155  */
3156 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3157         unsigned int freq, int dir)
3158 {
3159         if (dai->driver && dai->driver->ops->set_sysclk)
3160                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3161         else if (dai->codec && dai->codec->driver->set_sysclk)
3162                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3163                                                       freq, dir);
3164         else
3165                 return -EINVAL;
3166 }
3167 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3168
3169 /**
3170  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3171  * @codec: CODEC
3172  * @clk_id: DAI specific clock ID
3173  * @freq: new clock frequency in Hz
3174  * @dir: new clock direction - input/output.
3175  *
3176  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3177  */
3178 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3179         unsigned int freq, int dir)
3180 {
3181         if (codec->driver->set_sysclk)
3182                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3183         else
3184                 return -EINVAL;
3185 }
3186 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3187
3188 /**
3189  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3190  * @dai: DAI
3191  * @div_id: DAI specific clock divider ID
3192  * @div: new clock divisor.
3193  *
3194  * Configures the clock dividers. This is used to derive the best DAI bit and
3195  * frame clocks from the system or master clock. It's best to set the DAI bit
3196  * and frame clocks as low as possible to save system power.
3197  */
3198 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3199         int div_id, int div)
3200 {
3201         if (dai->driver && dai->driver->ops->set_clkdiv)
3202                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3203         else
3204                 return -EINVAL;
3205 }
3206 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3207
3208 /**
3209  * snd_soc_dai_set_pll - configure DAI PLL.
3210  * @dai: DAI
3211  * @pll_id: DAI specific PLL ID
3212  * @source: DAI specific source for the PLL
3213  * @freq_in: PLL input clock frequency in Hz
3214  * @freq_out: requested PLL output clock frequency in Hz
3215  *
3216  * Configures and enables PLL to generate output clock based on input clock.
3217  */
3218 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3219         unsigned int freq_in, unsigned int freq_out)
3220 {
3221         if (dai->driver && dai->driver->ops->set_pll)
3222                 return dai->driver->ops->set_pll(dai, pll_id, source,
3223                                          freq_in, freq_out);
3224         else if (dai->codec && dai->codec->driver->set_pll)
3225                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3226                                                    freq_in, freq_out);
3227         else
3228                 return -EINVAL;
3229 }
3230 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3231
3232 /*
3233  * snd_soc_codec_set_pll - configure codec PLL.
3234  * @codec: CODEC
3235  * @pll_id: DAI specific PLL ID
3236  * @source: DAI specific source for the PLL
3237  * @freq_in: PLL input clock frequency in Hz
3238  * @freq_out: requested PLL output clock frequency in Hz
3239  *
3240  * Configures and enables PLL to generate output clock based on input clock.
3241  */
3242 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3243                           unsigned int freq_in, unsigned int freq_out)
3244 {
3245         if (codec->driver->set_pll)
3246                 return codec->driver->set_pll(codec, pll_id, source,
3247                                               freq_in, freq_out);
3248         else
3249                 return -EINVAL;
3250 }
3251 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3252
3253 /**
3254  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3255  * @dai: DAI
3256  * @fmt: SND_SOC_DAIFMT_ format value.
3257  *
3258  * Configures the DAI hardware format and clocking.
3259  */
3260 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3261 {
3262         if (dai->driver && dai->driver->ops->set_fmt)
3263                 return dai->driver->ops->set_fmt(dai, fmt);
3264         else
3265                 return -EINVAL;
3266 }
3267 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3268
3269 /**
3270  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3271  * @dai: DAI
3272  * @tx_mask: bitmask representing active TX slots.
3273  * @rx_mask: bitmask representing active RX slots.
3274  * @slots: Number of slots in use.
3275  * @slot_width: Width in bits for each slot.
3276  *
3277  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3278  * specific.
3279  */
3280 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3281         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3282 {
3283         if (dai->driver && dai->driver->ops->set_tdm_slot)
3284                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3285                                 slots, slot_width);
3286         else
3287                 return -EINVAL;
3288 }
3289 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3290
3291 /**
3292  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3293  * @dai: DAI
3294  * @tx_num: how many TX channels
3295  * @tx_slot: pointer to an array which imply the TX slot number channel
3296  *           0~num-1 uses
3297  * @rx_num: how many RX channels
3298  * @rx_slot: pointer to an array which imply the RX slot number channel
3299  *           0~num-1 uses
3300  *
3301  * configure the relationship between channel number and TDM slot number.
3302  */
3303 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3304         unsigned int tx_num, unsigned int *tx_slot,
3305         unsigned int rx_num, unsigned int *rx_slot)
3306 {
3307         if (dai->driver && dai->driver->ops->set_channel_map)
3308                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3309                         rx_num, rx_slot);
3310         else
3311                 return -EINVAL;
3312 }
3313 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3314
3315 /**
3316  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3317  * @dai: DAI
3318  * @tristate: tristate enable
3319  *
3320  * Tristates the DAI so that others can use it.
3321  */
3322 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3323 {
3324         if (dai->driver && dai->driver->ops->set_tristate)
3325                 return dai->driver->ops->set_tristate(dai, tristate);
3326         else
3327                 return -EINVAL;
3328 }
3329 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3330
3331 /**
3332  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3333  * @dai: DAI
3334  * @mute: mute enable
3335  *
3336  * Mutes the DAI DAC.
3337  */
3338 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3339 {
3340         if (dai->driver && dai->driver->ops->digital_mute)
3341                 return dai->driver->ops->digital_mute(dai, mute);
3342         else
3343                 return -EINVAL;
3344 }
3345 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3346
3347 /**
3348  * snd_soc_register_card - Register a card with the ASoC core
3349  *
3350  * @card: Card to register
3351  *
3352  */
3353 int snd_soc_register_card(struct snd_soc_card *card)
3354 {
3355         int i;
3356
3357         if (!card->name || !card->dev)
3358                 return -EINVAL;
3359
3360         dev_set_drvdata(card->dev, card);
3361
3362         snd_soc_initialize_card_lists(card);
3363
3364         soc_init_card_debugfs(card);
3365
3366         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3367                             (card->num_links + card->num_aux_devs),
3368                             GFP_KERNEL);
3369         if (card->rtd == NULL)
3370                 return -ENOMEM;
3371         card->rtd_aux = &card->rtd[card->num_links];
3372
3373         for (i = 0; i < card->num_links; i++)
3374                 card->rtd[i].dai_link = &card->dai_link[i];
3375
3376         INIT_LIST_HEAD(&card->list);
3377         card->instantiated = 0;
3378         mutex_init(&card->mutex);
3379
3380         mutex_lock(&client_mutex);
3381         list_add(&card->list, &card_list);
3382         snd_soc_instantiate_cards();
3383         mutex_unlock(&client_mutex);
3384
3385         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3386
3387         return 0;
3388 }
3389 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3390
3391 /**
3392  * snd_soc_unregister_card - Unregister a card with the ASoC core
3393  *
3394  * @card: Card to unregister
3395  *
3396  */
3397 int snd_soc_unregister_card(struct snd_soc_card *card)
3398 {
3399         if (card->instantiated)
3400                 soc_cleanup_card_resources(card);
3401         mutex_lock(&client_mutex);
3402         list_del(&card->list);
3403         mutex_unlock(&client_mutex);
3404         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3405
3406         return 0;
3407 }
3408 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3409
3410 /*
3411  * Simplify DAI link configuration by removing ".-1" from device names
3412  * and sanitizing names.
3413  */
3414 static char *fmt_single_name(struct device *dev, int *id)
3415 {
3416         char *found, name[NAME_SIZE];
3417         int id1, id2;
3418
3419         if (dev_name(dev) == NULL)
3420                 return NULL;
3421
3422         strlcpy(name, dev_name(dev), NAME_SIZE);
3423
3424         /* are we a "%s.%d" name (platform and SPI components) */
3425         found = strstr(name, dev->driver->name);
3426         if (found) {
3427                 /* get ID */
3428                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3429
3430                         /* discard ID from name if ID == -1 */
3431                         if (*id == -1)
3432                                 found[strlen(dev->driver->name)] = '\0';
3433                 }
3434
3435         } else {
3436                 /* I2C component devices are named "bus-addr"  */
3437                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3438                         char tmp[NAME_SIZE];
3439
3440                         /* create unique ID number from I2C addr and bus */
3441                         *id = ((id1 & 0xffff) << 16) + id2;
3442
3443                         /* sanitize component name for DAI link creation */
3444                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3445                         strlcpy(name, tmp, NAME_SIZE);
3446                 } else
3447                         *id = 0;
3448         }
3449
3450         return kstrdup(name, GFP_KERNEL);
3451 }
3452
3453 /*
3454  * Simplify DAI link naming for single devices with multiple DAIs by removing
3455  * any ".-1" and using the DAI name (instead of device name).
3456  */
3457 static inline char *fmt_multiple_name(struct device *dev,
3458                 struct snd_soc_dai_driver *dai_drv)
3459 {
3460         if (dai_drv->name == NULL) {
3461                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3462                                 dev_name(dev));
3463                 return NULL;
3464         }
3465
3466         return kstrdup(dai_drv->name, GFP_KERNEL);
3467 }
3468
3469 /**
3470  * snd_soc_register_dai - Register a DAI with the ASoC core
3471  *
3472  * @dai: DAI to register
3473  */
3474 int snd_soc_register_dai(struct device *dev,
3475                 struct snd_soc_dai_driver *dai_drv)
3476 {
3477         struct snd_soc_dai *dai;
3478
3479         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3480
3481         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3482         if (dai == NULL)
3483                 return -ENOMEM;
3484
3485         /* create DAI component name */
3486         dai->name = fmt_single_name(dev, &dai->id);
3487         if (dai->name == NULL) {
3488                 kfree(dai);
3489                 return -ENOMEM;
3490         }
3491
3492         dai->dev = dev;
3493         dai->driver = dai_drv;
3494         if (!dai->driver->ops)
3495                 dai->driver->ops = &null_dai_ops;
3496
3497         mutex_lock(&client_mutex);
3498         list_add(&dai->list, &dai_list);
3499         snd_soc_instantiate_cards();
3500         mutex_unlock(&client_mutex);
3501
3502         pr_debug("Registered DAI '%s'\n", dai->name);
3503
3504         return 0;
3505 }
3506 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3507
3508 /**
3509  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3510  *
3511  * @dai: DAI to unregister
3512  */
3513 void snd_soc_unregister_dai(struct device *dev)
3514 {
3515         struct snd_soc_dai *dai;
3516
3517         list_for_each_entry(dai, &dai_list, list) {
3518                 if (dev == dai->dev)
3519                         goto found;
3520         }
3521         return;
3522
3523 found:
3524         mutex_lock(&client_mutex);
3525         list_del(&dai->list);
3526         mutex_unlock(&client_mutex);
3527
3528         pr_debug("Unregistered DAI '%s'\n", dai->name);
3529         kfree(dai->name);
3530         kfree(dai);
3531 }
3532 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3533
3534 /**
3535  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3536  *
3537  * @dai: Array of DAIs to register
3538  * @count: Number of DAIs
3539  */
3540 int snd_soc_register_dais(struct device *dev,
3541                 struct snd_soc_dai_driver *dai_drv, size_t count)
3542 {
3543         struct snd_soc_dai *dai;
3544         int i, ret = 0;
3545
3546         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3547
3548         for (i = 0; i < count; i++) {
3549
3550                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3551                 if (dai == NULL) {
3552                         ret = -ENOMEM;
3553                         goto err;
3554                 }
3555
3556                 /* create DAI component name */
3557                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3558                 if (dai->name == NULL) {
3559                         kfree(dai);
3560                         ret = -EINVAL;
3561                         goto err;
3562                 }
3563
3564                 dai->dev = dev;
3565                 dai->driver = &dai_drv[i];
3566                 if (dai->driver->id)
3567                         dai->id = dai->driver->id;
3568                 else
3569                         dai->id = i;
3570                 if (!dai->driver->ops)
3571                         dai->driver->ops = &null_dai_ops;
3572
3573                 mutex_lock(&client_mutex);
3574                 list_add(&dai->list, &dai_list);
3575                 mutex_unlock(&client_mutex);
3576
3577                 pr_debug("Registered DAI '%s'\n", dai->name);
3578         }
3579
3580         mutex_lock(&client_mutex);
3581         snd_soc_instantiate_cards();
3582         mutex_unlock(&client_mutex);
3583         return 0;
3584
3585 err:
3586         for (i--; i >= 0; i--)
3587                 snd_soc_unregister_dai(dev);
3588
3589         return ret;
3590 }
3591 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3592
3593 /**
3594  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3595  *
3596  * @dai: Array of DAIs to unregister
3597  * @count: Number of DAIs
3598  */
3599 void snd_soc_unregister_dais(struct device *dev, size_t count)
3600 {
3601         int i;
3602
3603         for (i = 0; i < count; i++)
3604                 snd_soc_unregister_dai(dev);
3605 }
3606 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3607
3608 /**
3609  * snd_soc_register_platform - Register a platform with the ASoC core
3610  *
3611  * @platform: platform to register
3612  */
3613 int snd_soc_register_platform(struct device *dev,
3614                 struct snd_soc_platform_driver *platform_drv)
3615 {
3616         struct snd_soc_platform *platform;
3617
3618         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3619
3620         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3621         if (platform == NULL)
3622                 return -ENOMEM;
3623
3624         /* create platform component name */
3625         platform->name = fmt_single_name(dev, &platform->id);
3626         if (platform->name == NULL) {
3627                 kfree(platform);
3628                 return -ENOMEM;
3629         }
3630
3631         platform->dev = dev;
3632         platform->driver = platform_drv;
3633
3634         mutex_lock(&client_mutex);
3635         list_add(&platform->list, &platform_list);
3636         snd_soc_instantiate_cards();
3637         mutex_unlock(&client_mutex);
3638
3639         pr_debug("Registered platform '%s'\n", platform->name);
3640
3641         return 0;
3642 }
3643 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3644
3645 /**
3646  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3647  *
3648  * @platform: platform to unregister
3649  */
3650 void snd_soc_unregister_platform(struct device *dev)
3651 {
3652         struct snd_soc_platform *platform;
3653
3654         list_for_each_entry(platform, &platform_list, list) {
3655                 if (dev == platform->dev)
3656                         goto found;
3657         }
3658         return;
3659
3660 found:
3661         mutex_lock(&client_mutex);
3662         list_del(&platform->list);
3663         mutex_unlock(&client_mutex);
3664
3665         pr_debug("Unregistered platform '%s'\n", platform->name);
3666         kfree(platform->name);
3667         kfree(platform);
3668 }
3669 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3670
3671 static u64 codec_format_map[] = {
3672         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3673         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3674         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3675         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3676         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3677         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3678         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3679         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3680         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3681         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3682         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3683         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3684         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3685         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3686         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3687         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3688 };
3689
3690 /* Fix up the DAI formats for endianness: codecs don't actually see
3691  * the endianness of the data but we're using the CPU format
3692  * definitions which do need to include endianness so we ensure that
3693  * codec DAIs always have both big and little endian variants set.
3694  */
3695 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3696 {
3697         int i;
3698
3699         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3700                 if (stream->formats & codec_format_map[i])
3701                         stream->formats |= codec_format_map[i];
3702 }
3703
3704 /**
3705  * snd_soc_register_codec - Register a codec with the ASoC core
3706  *
3707  * @codec: codec to register
3708  */
3709 int snd_soc_register_codec(struct device *dev,
3710                            const struct snd_soc_codec_driver *codec_drv,
3711                            struct snd_soc_dai_driver *dai_drv,
3712                            int num_dai)
3713 {
3714         size_t reg_size;
3715         struct snd_soc_codec *codec;
3716         int ret, i;
3717
3718         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3719
3720         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3721         if (codec == NULL)
3722                 return -ENOMEM;
3723
3724         /* create CODEC component name */
3725         codec->name = fmt_single_name(dev, &codec->id);
3726         if (codec->name == NULL) {
3727                 kfree(codec);
3728                 return -ENOMEM;
3729         }
3730
3731         if (codec_drv->compress_type)
3732                 codec->compress_type = codec_drv->compress_type;
3733         else
3734                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3735
3736         codec->write = codec_drv->write;
3737         codec->read = codec_drv->read;
3738         codec->volatile_register = codec_drv->volatile_register;
3739         codec->readable_register = codec_drv->readable_register;
3740         codec->writable_register = codec_drv->writable_register;
3741         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3742         codec->dapm.dev = dev;
3743         codec->dapm.codec = codec;
3744         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3745         codec->dev = dev;
3746         codec->driver = codec_drv;
3747         codec->num_dai = num_dai;
3748         mutex_init(&codec->mutex);
3749
3750         /* allocate CODEC register cache */
3751         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3752                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3753                 codec->reg_size = reg_size;
3754                 /* it is necessary to make a copy of the default register cache
3755                  * because in the case of using a compression type that requires
3756                  * the default register cache to be marked as __devinitconst the
3757                  * kernel might have freed the array by the time we initialize
3758                  * the cache.
3759                  */
3760                 if (codec_drv->reg_cache_default) {
3761                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3762                                                       reg_size, GFP_KERNEL);
3763                         if (!codec->reg_def_copy) {
3764                                 ret = -ENOMEM;
3765                                 goto fail;
3766                         }
3767                 }
3768         }
3769
3770         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3771                 if (!codec->volatile_register)
3772                         codec->volatile_register = snd_soc_default_volatile_register;
3773                 if (!codec->readable_register)
3774                         codec->readable_register = snd_soc_default_readable_register;
3775                 if (!codec->writable_register)
3776                         codec->writable_register = snd_soc_default_writable_register;
3777         }
3778
3779         for (i = 0; i < num_dai; i++) {
3780                 fixup_codec_formats(&dai_drv[i].playback);
3781                 fixup_codec_formats(&dai_drv[i].capture);
3782         }
3783
3784         /* register any DAIs */
3785         if (num_dai) {
3786                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3787                 if (ret < 0)
3788                         goto fail;
3789         }
3790
3791         mutex_lock(&client_mutex);
3792         list_add(&codec->list, &codec_list);
3793         snd_soc_instantiate_cards();
3794         mutex_unlock(&client_mutex);
3795
3796         pr_debug("Registered codec '%s'\n", codec->name);
3797         return 0;
3798
3799 fail:
3800         kfree(codec->reg_def_copy);
3801         codec->reg_def_copy = NULL;
3802         kfree(codec->name);
3803         kfree(codec);
3804         return ret;
3805 }
3806 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3807
3808 /**
3809  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3810  *
3811  * @codec: codec to unregister
3812  */
3813 void snd_soc_unregister_codec(struct device *dev)
3814 {
3815         struct snd_soc_codec *codec;
3816         int i;
3817
3818         list_for_each_entry(codec, &codec_list, list) {
3819                 if (dev == codec->dev)
3820                         goto found;
3821         }
3822         return;
3823
3824 found:
3825         if (codec->num_dai)
3826                 for (i = 0; i < codec->num_dai; i++)
3827                         snd_soc_unregister_dai(dev);
3828
3829         mutex_lock(&client_mutex);
3830         list_del(&codec->list);
3831         mutex_unlock(&client_mutex);
3832
3833         pr_debug("Unregistered codec '%s'\n", codec->name);
3834
3835         snd_soc_cache_exit(codec);
3836         kfree(codec->reg_def_copy);
3837         kfree(codec->name);
3838         kfree(codec);
3839 }
3840 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3841
3842 static int __init snd_soc_init(void)
3843 {
3844 #ifdef CONFIG_DEBUG_FS
3845         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3846         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3847                 printk(KERN_WARNING
3848                        "ASoC: Failed to create debugfs directory\n");
3849                 snd_soc_debugfs_root = NULL;
3850         }
3851
3852         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3853                                  &codec_list_fops))
3854                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3855
3856         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3857                                  &dai_list_fops))
3858                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3859
3860         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3861                                  &platform_list_fops))
3862                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3863 #endif
3864
3865         snd_soc_util_init();
3866
3867         return platform_driver_register(&soc_driver);
3868 }
3869 module_init(snd_soc_init);
3870
3871 static void __exit snd_soc_exit(void)
3872 {
3873         snd_soc_util_exit();
3874
3875 #ifdef CONFIG_DEBUG_FS
3876         debugfs_remove_recursive(snd_soc_debugfs_root);
3877 #endif
3878         platform_driver_unregister(&soc_driver);
3879 }
3880 module_exit(snd_soc_exit);
3881
3882 /* Module information */
3883 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3884 MODULE_DESCRIPTION("ALSA SoC Core");
3885 MODULE_LICENSE("GPL");
3886 MODULE_ALIAS("platform:soc-audio");