sound/soc/soc-core.c

   1 /*
   2  * soc-core.c  --  ALSA SoC Audio Layer
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright (C) 2010 Slimlogic Ltd.
   7  * Copyright (C) 2010 Texas Instruments Inc.
   8  *
   9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
  10  *         with code, comments and ideas from :-
  11  *         Richard Purdie <richard@openedhand.com>
  12  *
  13  *  This program is free software; you can redistribute  it and/or modify it
  14  *  under  the terms of  the GNU General  Public License as published by the
  15  *  Free Software Foundation;  either version 2 of the  License, or (at your
  16  *  option) any later version.
  17  *
  18  *  TODO:
  19  *   o Add hw rules to enforce rates, etc.
  20  *   o More testing with other codecs/machines.
  21  *   o Add more codecs and platforms to ensure good API coverage.
  22  *   o Support TDM on PCM and I2S
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/bitops.h>
  31 #include <linux/debugfs.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/slab.h>
  34 #include <sound/ac97_codec.h>
  35 #include <sound/core.h>
  36 #include <sound/jack.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include <sound/soc.h>
  40 #include <sound/initval.h>
  41
  42 #define CREATE_TRACE_POINTS
  43 #include <trace/events/asoc.h>
  44
  45 #define NAME_SIZE       32
  46
  47 static DEFINE_MUTEX(pcm_mutex);
  48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
  49
  50 #ifdef CONFIG_DEBUG_FS
  51 struct dentry *snd_soc_debugfs_root;
  52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
  53 #endif
  54
  55 static DEFINE_MUTEX(client_mutex);
  56 static LIST_HEAD(card_list);
  57 static LIST_HEAD(dai_list);
  58 static LIST_HEAD(platform_list);
  59 static LIST_HEAD(codec_list);
  60
  61 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
  62
  63 /*
  64  * This is a timeout to do a DAPM powerdown after a stream is closed().
  65  * It can be used to eliminate pops between different playback streams, e.g.
  66  * between two audio tracks.
  67  */
  68 static int pmdown_time = 5000;
  69 module_param(pmdown_time, int, 0);
  70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  71
  72 /* returns the minimum number of bytes needed to represent
  73  * a particular given value */
  74 static int min_bytes_needed(unsigned long val)
  75 {
  76         int c = 0;
  77         int i;
  78
  79         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
  80                 if (val & (1UL << i))
  81                         break;
  82         c = (sizeof val * 8) - c;
  83         if (!c || (c % 8))
  84                 c = (c + 8) / 8;
  85         else
  86                 c /= 8;
  87         return c;
  88 }
  89
  90 /* fill buf which is 'len' bytes with a formatted
  91  * string of the form 'reg: value\n' */
  92 static int format_register_str(struct snd_soc_codec *codec,
  93                                unsigned int reg, char *buf, size_t len)
  94 {
  95         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
  96         int regsize = codec->driver->reg_word_size * 2;
  97         int ret;
  98         char tmpbuf[len + 1];
  99         char regbuf[regsize + 1];
 100
 101         /* since tmpbuf is allocated on the stack, warn the callers if they
 102          * try to abuse this function */
 103         WARN_ON(len > 63);
 104
 105         /* +2 for ': ' and + 1 for '\n' */
 106         if (wordsize + regsize + 2 + 1 != len)
 107                 return -EINVAL;
 108
 109         ret = snd_soc_read(codec , reg);
 110         if (ret < 0) {
 111                 memset(regbuf, 'X', regsize);
 112                 regbuf[regsize] = '\0';
 113         } else {
 114                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
 115         }
 116
 117         /* prepare the buffer */
 118         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
 119         /* copy it back to the caller without the '\0' */
 120         memcpy(buf, tmpbuf, len);
 121
 122         return 0;
 123 }
 124
 125 /* codec register dump */
 126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
 127                                   size_t count, loff_t pos)
 128 {
 129         int i, step = 1;
 130         int wordsize, regsize;
 131         int len;
 132         size_t total = 0;
 133         loff_t p = 0;
 134
 135         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 136         regsize = codec->driver->reg_word_size * 2;
 137
 138         len = wordsize + regsize + 2 + 1;
 139
 140         if (!codec->driver->reg_cache_size)
 141                 return 0;
 142
 143         if (codec->driver->reg_cache_step)
 144                 step = codec->driver->reg_cache_step;
 145
 146         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 147                 if (codec->readable_register && !codec->readable_register(codec, i))
 148                         continue;
 149                 if (codec->driver->display_register) {
 150                         count += codec->driver->display_register(codec, buf + count,
 151                                                          PAGE_SIZE - count, i);
 152                 } else {
 153                         /* only support larger than PAGE_SIZE bytes debugfs
 154                          * entries for the default case */
 155                         if (p >= pos) {
 156                                 if (total + len >= count - 1)
 157                                         break;
 158                                 format_register_str(codec, i, buf + total, len);
 159                                 total += len;
 160                         }
 161                         p += len;
 162                 }
 163         }
 164
 165         total = min(total, count - 1);
 166
 167         return total;
 168 }
 169
 170 static ssize_t codec_reg_show(struct device *dev,
 171         struct device_attribute *attr, char *buf)
 172 {
 173         struct snd_soc_pcm_runtime *rtd =
 174                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 175
 176         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 177 }
 178
 179 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 180
 181 static ssize_t pmdown_time_show(struct device *dev,
 182                                 struct device_attribute *attr, char *buf)
 183 {
 184         struct snd_soc_pcm_runtime *rtd =
 185                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 186
 187         return sprintf(buf, "%ld\n", rtd->pmdown_time);
 188 }
 189
 190 static ssize_t pmdown_time_set(struct device *dev,
 191                                struct device_attribute *attr,
 192                                const char *buf, size_t count)
 193 {
 194         struct snd_soc_pcm_runtime *rtd =
 195                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 196         int ret;
 197
 198         ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 199         if (ret)
 200                 return ret;
 201
 202         return count;
 203 }
 204
 205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 206
 207 #ifdef CONFIG_DEBUG_FS
 208 static int codec_reg_open_file(struct inode *inode, struct file *file)
 209 {
 210         file->private_data = inode->i_private;
 211         return 0;
 212 }
 213
 214 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 215                                    size_t count, loff_t *ppos)
 216 {
 217         ssize_t ret;
 218         struct snd_soc_codec *codec = file->private_data;
 219         char *buf;
 220
 221         if (*ppos < 0 || !count)
 222                 return -EINVAL;
 223
 224         buf = kmalloc(count, GFP_KERNEL);
 225         if (!buf)
 226                 return -ENOMEM;
 227
 228         ret = soc_codec_reg_show(codec, buf, count, *ppos);
 229         if (ret >= 0) {
 230                 if (copy_to_user(user_buf, buf, ret)) {
 231                         kfree(buf);
 232                         return -EFAULT;
 233                 }
 234                 *ppos += ret;
 235         }
 236
 237         kfree(buf);
 238         return ret;
 239 }
 240
 241 static ssize_t codec_reg_write_file(struct file *file,
 242                 const char __user *user_buf, size_t count, loff_t *ppos)
 243 {
 244         char buf[32];
 245         int buf_size;
 246         char *start = buf;
 247         unsigned long reg, value;
 248         int step = 1;
 249         struct snd_soc_codec *codec = file->private_data;
 250
 251         buf_size = min(count, (sizeof(buf)-1));
 252         if (copy_from_user(buf, user_buf, buf_size))
 253                 return -EFAULT;
 254         buf[buf_size] = 0;
 255
 256         if (codec->driver->reg_cache_step)
 257                 step = codec->driver->reg_cache_step;
 258
 259         while (*start == ' ')
 260                 start++;
 261         reg = simple_strtoul(start, &start, 16);
 262         while (*start == ' ')
 263                 start++;
 264         if (strict_strtoul(start, 16, &value))
 265                 return -EINVAL;
 266
 267         /* Userspace has been fiddling around behind the kernel's back */
 268         add_taint(TAINT_USER);
 269
 270         snd_soc_write(codec, reg, value);
 271         return buf_size;
 272 }
 273
 274 static const struct file_operations codec_reg_fops = {
 275         .open = codec_reg_open_file,
 276         .read = codec_reg_read_file,
 277         .write = codec_reg_write_file,
 278         .llseek = default_llseek,
 279 };
 280
 281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 282 {
 283         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 284
 285         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 286                                                        debugfs_card_root);
 287         if (!codec->debugfs_codec_root) {
 288                 printk(KERN_WARNING
 289                        "ASoC: Failed to create codec debugfs directory\n");
 290                 return;
 291         }
 292
 293         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
 294                             &codec->cache_sync);
 295         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
 296                             &codec->cache_only);
 297
 298         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 299                                                  codec->debugfs_codec_root,
 300                                                  codec, &codec_reg_fops);
 301         if (!codec->debugfs_reg)
 302                 printk(KERN_WARNING
 303                        "ASoC: Failed to create codec register debugfs file\n");
 304
 305         codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
 306                                                  codec->debugfs_codec_root);
 307         if (!codec->dapm.debugfs_dapm)
 308                 printk(KERN_WARNING
 309                        "Failed to create DAPM debugfs directory\n");
 310
 311         snd_soc_dapm_debugfs_init(&codec->dapm);
 312 }
 313
 314 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 315 {
 316         debugfs_remove_recursive(codec->debugfs_codec_root);
 317 }
 318
 319 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 320                                     size_t count, loff_t *ppos)
 321 {
 322         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 323         ssize_t len, ret = 0;
 324         struct snd_soc_codec *codec;
 325
 326         if (!buf)
 327                 return -ENOMEM;
 328
 329         list_for_each_entry(codec, &codec_list, list) {
 330                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 331                                codec->name);
 332                 if (len >= 0)
 333                         ret += len;
 334                 if (ret > PAGE_SIZE) {
 335                         ret = PAGE_SIZE;
 336                         break;
 337                 }
 338         }
 339
 340         if (ret >= 0)
 341                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 342
 343         kfree(buf);
 344
 345         return ret;
 346 }
 347
 348 static const struct file_operations codec_list_fops = {
 349         .read = codec_list_read_file,
 350         .llseek = default_llseek,/* read accesses f_pos */
 351 };
 352
 353 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 354                                   size_t count, loff_t *ppos)
 355 {
 356         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 357         ssize_t len, ret = 0;
 358         struct snd_soc_dai *dai;
 359
 360         if (!buf)
 361                 return -ENOMEM;
 362
 363         list_for_each_entry(dai, &dai_list, list) {
 364                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 365                 if (len >= 0)
 366                         ret += len;
 367                 if (ret > PAGE_SIZE) {
 368                         ret = PAGE_SIZE;
 369                         break;
 370                 }
 371         }
 372
 373         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 374
 375         kfree(buf);
 376
 377         return ret;
 378 }
 379
 380 static const struct file_operations dai_list_fops = {
 381         .read = dai_list_read_file,
 382         .llseek = default_llseek,/* read accesses f_pos */
 383 };
 384
 385 static ssize_t platform_list_read_file(struct file *file,
 386                                        char __user *user_buf,
 387                                        size_t count, loff_t *ppos)
 388 {
 389         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 390         ssize_t len, ret = 0;
 391         struct snd_soc_platform *platform;
 392
 393         if (!buf)
 394                 return -ENOMEM;
 395
 396         list_for_each_entry(platform, &platform_list, list) {
 397                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 398                                platform->name);
 399                 if (len >= 0)
 400                         ret += len;
 401                 if (ret > PAGE_SIZE) {
 402                         ret = PAGE_SIZE;
 403                         break;
 404                 }
 405         }
 406
 407         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 408
 409         kfree(buf);
 410
 411         return ret;
 412 }
 413
 414 static const struct file_operations platform_list_fops = {
 415         .read = platform_list_read_file,
 416         .llseek = default_llseek,/* read accesses f_pos */
 417 };
 418
 419 static void soc_init_card_debugfs(struct snd_soc_card *card)
 420 {
 421         card->debugfs_card_root = debugfs_create_dir(card->name,
 422                                                      snd_soc_debugfs_root);
 423         if (!card->debugfs_card_root) {
 424                 dev_warn(card->dev,
 425                          "ASoC: Failed to create codec debugfs directory\n");
 426                 return;
 427         }
 428
 429         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 430                                                     card->debugfs_card_root,
 431                                                     &card->pop_time);
 432         if (!card->debugfs_pop_time)
 433                 dev_warn(card->dev,
 434                        "Failed to create pop time debugfs file\n");
 435 }
 436
 437 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 438 {
 439         debugfs_remove_recursive(card->debugfs_card_root);
 440 }
 441
 442 #else
 443
 444 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 445 {
 446 }
 447
 448 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 449 {
 450 }
 451
 452 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 453 {
 454 }
 455
 456 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 457 {
 458 }
 459 #endif
 460
 461 #ifdef CONFIG_SND_SOC_AC97_BUS
 462 /* unregister ac97 codec */
 463 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 464 {
 465         if (codec->ac97->dev.bus)
 466                 device_unregister(&codec->ac97->dev);
 467         return 0;
 468 }
 469
 470 /* stop no dev release warning */
 471 static void soc_ac97_device_release(struct device *dev){}
 472
 473 /* register ac97 codec to bus */
 474 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 475 {
 476         int err;
 477
 478         codec->ac97->dev.bus = &ac97_bus_type;
 479         codec->ac97->dev.parent = codec->card->dev;
 480         codec->ac97->dev.release = soc_ac97_device_release;
 481
 482         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 483                      codec->card->snd_card->number, 0, codec->name);
 484         err = device_register(&codec->ac97->dev);
 485         if (err < 0) {
 486                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
 487                 codec->ac97->dev.bus = NULL;
 488                 return err;
 489         }
 490         return 0;
 491 }
 492 #endif
 493
 494 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 495 {
 496         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 497         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 498         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 499         int ret;
 500
 501         if (!codec_dai->driver->symmetric_rates &&
 502             !cpu_dai->driver->symmetric_rates &&
 503             !rtd->dai_link->symmetric_rates)
 504                 return 0;
 505
 506         /* This can happen if multiple streams are starting simultaneously -
 507          * the second can need to get its constraints before the first has
 508          * picked a rate.  Complain and allow the application to carry on.
 509          */
 510         if (!rtd->rate) {
 511                 dev_warn(&rtd->dev,
 512                          "Not enforcing symmetric_rates due to race\n");
 513                 return 0;
 514         }
 515
 516         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
 517
 518         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 519                                            SNDRV_PCM_HW_PARAM_RATE,
 520                                            rtd->rate, rtd->rate);
 521         if (ret < 0) {
 522                 dev_err(&rtd->dev,
 523                         "Unable to apply rate symmetry constraint: %d\n", ret);
 524                 return ret;
 525         }
 526
 527         return 0;
 528 }
 529
 530 /*
 531  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 532  * then initialized and any private data can be allocated. This also calls
 533  * startup for the cpu DAI, platform, machine and codec DAI.
 534  */
 535 static int soc_pcm_open(struct snd_pcm_substream *substream)
 536 {
 537         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 538         struct snd_pcm_runtime *runtime = substream->runtime;
 539         struct snd_soc_platform *platform = rtd->platform;
 540         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 541         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 542         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 543         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 544         int ret = 0;
 545
 546         mutex_lock(&pcm_mutex);
 547
 548         /* startup the audio subsystem */
 549         if (cpu_dai->driver->ops->startup) {
 550                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 551                 if (ret < 0) {
 552                         printk(KERN_ERR "asoc: can't open interface %s\n",
 553                                 cpu_dai->name);
 554                         goto out;
 555                 }
 556         }
 557
 558         if (platform->driver->ops->open) {
 559                 ret = platform->driver->ops->open(substream);
 560                 if (ret < 0) {
 561                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
 562                         goto platform_err;
 563                 }
 564         }
 565
 566         if (codec_dai->driver->ops->startup) {
 567                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 568                 if (ret < 0) {
 569                         printk(KERN_ERR "asoc: can't open codec %s\n",
 570                                 codec_dai->name);
 571                         goto codec_dai_err;
 572                 }
 573         }
 574
 575         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 576                 ret = rtd->dai_link->ops->startup(substream);
 577                 if (ret < 0) {
 578                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
 579                         goto machine_err;
 580                 }
 581         }
 582
 583         /* Check that the codec and cpu DAIs are compatible */
 584         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 585                 runtime->hw.rate_min =
 586                         max(codec_dai_drv->playback.rate_min,
 587                             cpu_dai_drv->playback.rate_min);
 588                 runtime->hw.rate_max =
 589                         min(codec_dai_drv->playback.rate_max,
 590                             cpu_dai_drv->playback.rate_max);
 591                 runtime->hw.channels_min =
 592                         max(codec_dai_drv->playback.channels_min,
 593                                 cpu_dai_drv->playback.channels_min);
 594                 runtime->hw.channels_max =
 595                         min(codec_dai_drv->playback.channels_max,
 596                                 cpu_dai_drv->playback.channels_max);
 597                 runtime->hw.formats =
 598                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 599                 runtime->hw.rates =
 600                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 601                 if (codec_dai_drv->playback.rates
 602                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 603                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 604                 if (cpu_dai_drv->playback.rates
 605                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 606                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 607         } else {
 608                 runtime->hw.rate_min =
 609                         max(codec_dai_drv->capture.rate_min,
 610                             cpu_dai_drv->capture.rate_min);
 611                 runtime->hw.rate_max =
 612                         min(codec_dai_drv->capture.rate_max,
 613                             cpu_dai_drv->capture.rate_max);
 614                 runtime->hw.channels_min =
 615                         max(codec_dai_drv->capture.channels_min,
 616                                 cpu_dai_drv->capture.channels_min);
 617                 runtime->hw.channels_max =
 618                         min(codec_dai_drv->capture.channels_max,
 619                                 cpu_dai_drv->capture.channels_max);
 620                 runtime->hw.formats =
 621                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 622                 runtime->hw.rates =
 623                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 624                 if (codec_dai_drv->capture.rates
 625                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 626                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 627                 if (cpu_dai_drv->capture.rates
 628                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 629                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 630         }
 631
 632         snd_pcm_limit_hw_rates(runtime);
 633         if (!runtime->hw.rates) {
 634                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 635                         codec_dai->name, cpu_dai->name);
 636                 goto config_err;
 637         }
 638         if (!runtime->hw.formats) {
 639                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 640                         codec_dai->name, cpu_dai->name);
 641                 goto config_err;
 642         }
 643         if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
 644                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 645                                 codec_dai->name, cpu_dai->name);
 646                 goto config_err;
 647         }
 648
 649         /* Symmetry only applies if we've already got an active stream. */
 650         if (cpu_dai->active || codec_dai->active) {
 651                 ret = soc_pcm_apply_symmetry(substream);
 652                 if (ret != 0)
 653                         goto config_err;
 654         }
 655
 656         pr_debug("asoc: %s <-> %s info:\n",
 657                         codec_dai->name, cpu_dai->name);
 658         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 659         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 660                  runtime->hw.channels_max);
 661         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 662                  runtime->hw.rate_max);
 663
 664         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 665                 cpu_dai->playback_active++;
 666                 codec_dai->playback_active++;
 667         } else {
 668                 cpu_dai->capture_active++;
 669                 codec_dai->capture_active++;
 670         }
 671         cpu_dai->active++;
 672         codec_dai->active++;
 673         rtd->codec->active++;
 674         mutex_unlock(&pcm_mutex);
 675         return 0;
 676
 677 config_err:
 678         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 679                 rtd->dai_link->ops->shutdown(substream);
 680
 681 machine_err:
 682         if (codec_dai->driver->ops->shutdown)
 683                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 684
 685 codec_dai_err:
 686         if (platform->driver->ops->close)
 687                 platform->driver->ops->close(substream);
 688
 689 platform_err:
 690         if (cpu_dai->driver->ops->shutdown)
 691                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 692 out:
 693         mutex_unlock(&pcm_mutex);
 694         return ret;
 695 }
 696
 697 /*
 698  * Power down the audio subsystem pmdown_time msecs after close is called.
 699  * This is to ensure there are no pops or clicks in between any music tracks
 700  * due to DAPM power cycling.
 701  */
 702 static void close_delayed_work(struct work_struct *work)
 703 {
 704         struct snd_soc_pcm_runtime *rtd =
 705                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 706         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 707
 708         mutex_lock(&pcm_mutex);
 709
 710         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 711                  codec_dai->driver->playback.stream_name,
 712                  codec_dai->playback_active ? "active" : "inactive",
 713                  codec_dai->pop_wait ? "yes" : "no");
 714
 715         /* are we waiting on this codec DAI stream */
 716         if (codec_dai->pop_wait == 1) {
 717                 codec_dai->pop_wait = 0;
 718                 snd_soc_dapm_stream_event(rtd,
 719                         codec_dai->driver->playback.stream_name,
 720                         SND_SOC_DAPM_STREAM_STOP);
 721         }
 722
 723         mutex_unlock(&pcm_mutex);
 724 }
 725
 726 /*
 727  * Called by ALSA when a PCM substream is closed. Private data can be
 728  * freed here. The cpu DAI, codec DAI, machine and platform are also
 729  * shutdown.
 730  */
 731 static int soc_codec_close(struct snd_pcm_substream *substream)
 732 {
 733         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 734         struct snd_soc_platform *platform = rtd->platform;
 735         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 736         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 737         struct snd_soc_codec *codec = rtd->codec;
 738
 739         mutex_lock(&pcm_mutex);
 740
 741         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 742                 cpu_dai->playback_active--;
 743                 codec_dai->playback_active--;
 744         } else {
 745                 cpu_dai->capture_active--;
 746                 codec_dai->capture_active--;
 747         }
 748
 749         cpu_dai->active--;
 750         codec_dai->active--;
 751         codec->active--;
 752
 753         /* Muting the DAC suppresses artifacts caused during digital
 754          * shutdown, for example from stopping clocks.
 755          */
 756         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 757                 snd_soc_dai_digital_mute(codec_dai, 1);
 758
 759         if (cpu_dai->driver->ops->shutdown)
 760                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 761
 762         if (codec_dai->driver->ops->shutdown)
 763                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 764
 765         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 766                 rtd->dai_link->ops->shutdown(substream);
 767
 768         if (platform->driver->ops->close)
 769                 platform->driver->ops->close(substream);
 770         cpu_dai->runtime = NULL;
 771
 772         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 773                 /* start delayed pop wq here for playback streams */
 774                 codec_dai->pop_wait = 1;
 775                 schedule_delayed_work(&rtd->delayed_work,
 776                         msecs_to_jiffies(rtd->pmdown_time));
 777         } else {
 778                 /* capture streams can be powered down now */
 779                 snd_soc_dapm_stream_event(rtd,
 780                         codec_dai->driver->capture.stream_name,
 781                         SND_SOC_DAPM_STREAM_STOP);
 782         }
 783
 784         mutex_unlock(&pcm_mutex);
 785         return 0;
 786 }
 787
 788 /*
 789  * Called by ALSA when the PCM substream is prepared, can set format, sample
 790  * rate, etc.  This function is non atomic and can be called multiple times,
 791  * it can refer to the runtime info.
 792  */
 793 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 794 {
 795         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 796         struct snd_soc_platform *platform = rtd->platform;
 797         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 798         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 799         int ret = 0;
 800
 801         mutex_lock(&pcm_mutex);
 802
 803         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 804                 ret = rtd->dai_link->ops->prepare(substream);
 805                 if (ret < 0) {
 806                         printk(KERN_ERR "asoc: machine prepare error\n");
 807                         goto out;
 808                 }
 809         }
 810
 811         if (platform->driver->ops->prepare) {
 812                 ret = platform->driver->ops->prepare(substream);
 813                 if (ret < 0) {
 814                         printk(KERN_ERR "asoc: platform prepare error\n");
 815                         goto out;
 816                 }
 817         }
 818
 819         if (codec_dai->driver->ops->prepare) {
 820                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 821                 if (ret < 0) {
 822                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
 823                         goto out;
 824                 }
 825         }
 826
 827         if (cpu_dai->driver->ops->prepare) {
 828                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 829                 if (ret < 0) {
 830                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
 831                         goto out;
 832                 }
 833         }
 834
 835         /* cancel any delayed stream shutdown that is pending */
 836         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 837             codec_dai->pop_wait) {
 838                 codec_dai->pop_wait = 0;
 839                 cancel_delayed_work(&rtd->delayed_work);
 840         }
 841
 842         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 843                 snd_soc_dapm_stream_event(rtd,
 844                                           codec_dai->driver->playback.stream_name,
 845                                           SND_SOC_DAPM_STREAM_START);
 846         else
 847                 snd_soc_dapm_stream_event(rtd,
 848                                           codec_dai->driver->capture.stream_name,
 849                                           SND_SOC_DAPM_STREAM_START);
 850
 851         snd_soc_dai_digital_mute(codec_dai, 0);
 852
 853 out:
 854         mutex_unlock(&pcm_mutex);
 855         return ret;
 856 }
 857
 858 /*
 859  * Called by ALSA when the hardware params are set by application. This
 860  * function can also be called multiple times and can allocate buffers
 861  * (using snd_pcm_lib_* ). It's non-atomic.
 862  */
 863 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 864                                 struct snd_pcm_hw_params *params)
 865 {
 866         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 867         struct snd_soc_platform *platform = rtd->platform;
 868         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 869         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 870         int ret = 0;
 871
 872         mutex_lock(&pcm_mutex);
 873
 874         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 875                 ret = rtd->dai_link->ops->hw_params(substream, params);
 876                 if (ret < 0) {
 877                         printk(KERN_ERR "asoc: machine hw_params failed\n");
 878                         goto out;
 879                 }
 880         }
 881
 882         if (codec_dai->driver->ops->hw_params) {
 883                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 884                 if (ret < 0) {
 885                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
 886                                 codec_dai->name);
 887                         goto codec_err;
 888                 }
 889         }
 890
 891         if (cpu_dai->driver->ops->hw_params) {
 892                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 893                 if (ret < 0) {
 894                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
 895                                 cpu_dai->name);
 896                         goto interface_err;
 897                 }
 898         }
 899
 900         if (platform->driver->ops->hw_params) {
 901                 ret = platform->driver->ops->hw_params(substream, params);
 902                 if (ret < 0) {
 903                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
 904                                 platform->name);
 905                         goto platform_err;
 906                 }
 907         }
 908
 909         rtd->rate = params_rate(params);
 910
 911 out:
 912         mutex_unlock(&pcm_mutex);
 913         return ret;
 914
 915 platform_err:
 916         if (cpu_dai->driver->ops->hw_free)
 917                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 918
 919 interface_err:
 920         if (codec_dai->driver->ops->hw_free)
 921                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 922
 923 codec_err:
 924         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 925                 rtd->dai_link->ops->hw_free(substream);
 926
 927         mutex_unlock(&pcm_mutex);
 928         return ret;
 929 }
 930
 931 /*
 932  * Frees resources allocated by hw_params, can be called multiple times
 933  */
 934 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 935 {
 936         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 937         struct snd_soc_platform *platform = rtd->platform;
 938         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 939         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 940         struct snd_soc_codec *codec = rtd->codec;
 941
 942         mutex_lock(&pcm_mutex);
 943
 944         /* apply codec digital mute */
 945         if (!codec->active)
 946                 snd_soc_dai_digital_mute(codec_dai, 1);
 947
 948         /* free any machine hw params */
 949         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 950                 rtd->dai_link->ops->hw_free(substream);
 951
 952         /* free any DMA resources */
 953         if (platform->driver->ops->hw_free)
 954                 platform->driver->ops->hw_free(substream);
 955
 956         /* now free hw params for the DAIs  */
 957         if (codec_dai->driver->ops->hw_free)
 958                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 959
 960         if (cpu_dai->driver->ops->hw_free)
 961                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 962
 963         mutex_unlock(&pcm_mutex);
 964         return 0;
 965 }
 966
 967 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 968 {
 969         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 970         struct snd_soc_platform *platform = rtd->platform;
 971         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 972         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 973         int ret;
 974
 975         if (codec_dai->driver->ops->trigger) {
 976                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 977                 if (ret < 0)
 978                         return ret;
 979         }
 980
 981         if (platform->driver->ops->trigger) {
 982                 ret = platform->driver->ops->trigger(substream, cmd);
 983                 if (ret < 0)
 984                         return ret;
 985         }
 986
 987         if (cpu_dai->driver->ops->trigger) {
 988                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 989                 if (ret < 0)
 990                         return ret;
 991         }
 992         return 0;
 993 }
 994
 995 /*
 996  * soc level wrapper for pointer callback
 997  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 998  * the runtime->delay will be updated accordingly.
 999  */
1000 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1001 {
1002         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1003         struct snd_soc_platform *platform = rtd->platform;
1004         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1005         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1006         struct snd_pcm_runtime *runtime = substream->runtime;
1007         snd_pcm_uframes_t offset = 0;
1008         snd_pcm_sframes_t delay = 0;
1009
1010         if (platform->driver->ops->pointer)
1011                 offset = platform->driver->ops->pointer(substream);
1012
1013         if (cpu_dai->driver->ops->delay)
1014                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1015
1016         if (codec_dai->driver->ops->delay)
1017                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1018
1019         if (platform->driver->delay)
1020                 delay += platform->driver->delay(substream, codec_dai);
1021
1022         runtime->delay = delay;
1023
1024         return offset;
1025 }
1026
1027 /* ASoC PCM operations */
1028 static struct snd_pcm_ops soc_pcm_ops = {
1029         .open           = soc_pcm_open,
1030         .close          = soc_codec_close,
1031         .hw_params      = soc_pcm_hw_params,
1032         .hw_free        = soc_pcm_hw_free,
1033         .prepare        = soc_pcm_prepare,
1034         .trigger        = soc_pcm_trigger,
1035         .pointer        = soc_pcm_pointer,
1036 };
1037
1038 #ifdef CONFIG_PM_SLEEP
1039 /* powers down audio subsystem for suspend */
1040 int snd_soc_suspend(struct device *dev)
1041 {
1042         struct snd_soc_card *card = dev_get_drvdata(dev);
1043         struct snd_soc_codec *codec;
1044         int i;
1045
1046         /* If the initialization of this soc device failed, there is no codec
1047          * associated with it. Just bail out in this case.
1048          */
1049         if (list_empty(&card->codec_dev_list))
1050                 return 0;
1051
1052         /* Due to the resume being scheduled into a workqueue we could
1053         * suspend before that's finished - wait for it to complete.
1054          */
1055         snd_power_lock(card->snd_card);
1056         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1057         snd_power_unlock(card->snd_card);
1058
1059         /* we're going to block userspace touching us until resume completes */
1060         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1061
1062         /* mute any active DACs */
1063         for (i = 0; i < card->num_rtd; i++) {
1064                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1065                 struct snd_soc_dai_driver *drv = dai->driver;
1066
1067                 if (card->rtd[i].dai_link->ignore_suspend)
1068                         continue;
1069
1070                 if (drv->ops->digital_mute && dai->playback_active)
1071                         drv->ops->digital_mute(dai, 1);
1072         }
1073
1074         /* suspend all pcms */
1075         for (i = 0; i < card->num_rtd; i++) {
1076                 if (card->rtd[i].dai_link->ignore_suspend)
1077                         continue;
1078
1079                 snd_pcm_suspend_all(card->rtd[i].pcm);
1080         }
1081
1082         if (card->suspend_pre)
1083                 card->suspend_pre(card);
1084
1085         for (i = 0; i < card->num_rtd; i++) {
1086                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1087                 struct snd_soc_platform *platform = card->rtd[i].platform;
1088
1089                 if (card->rtd[i].dai_link->ignore_suspend)
1090                         continue;
1091
1092                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1093                         cpu_dai->driver->suspend(cpu_dai);
1094                 if (platform->driver->suspend && !platform->suspended) {
1095                         platform->driver->suspend(cpu_dai);
1096                         platform->suspended = 1;
1097                 }
1098         }
1099
1100         /* close any waiting streams and save state */
1101         for (i = 0; i < card->num_rtd; i++) {
1102                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1103                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1104         }
1105
1106         for (i = 0; i < card->num_rtd; i++) {
1107                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1108
1109                 if (card->rtd[i].dai_link->ignore_suspend)
1110                         continue;
1111
1112                 if (driver->playback.stream_name != NULL)
1113                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1114                                 SND_SOC_DAPM_STREAM_SUSPEND);
1115
1116                 if (driver->capture.stream_name != NULL)
1117                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1118                                 SND_SOC_DAPM_STREAM_SUSPEND);
1119         }
1120
1121         /* suspend all CODECs */
1122         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1123                 /* If there are paths active then the CODEC will be held with
1124                  * bias _ON and should not be suspended. */
1125                 if (!codec->suspended && codec->driver->suspend) {
1126                         switch (codec->dapm.bias_level) {
1127                         case SND_SOC_BIAS_STANDBY:
1128                         case SND_SOC_BIAS_OFF:
1129                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1130                                 codec->suspended = 1;
1131                                 break;
1132                         default:
1133                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1134                                 break;
1135                         }
1136                 }
1137         }
1138
1139         for (i = 0; i < card->num_rtd; i++) {
1140                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1141
1142                 if (card->rtd[i].dai_link->ignore_suspend)
1143                         continue;
1144
1145                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1146                         cpu_dai->driver->suspend(cpu_dai);
1147         }
1148
1149         if (card->suspend_post)
1150                 card->suspend_post(card);
1151
1152         return 0;
1153 }
1154 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1155
1156 /* deferred resume work, so resume can complete before we finished
1157  * setting our codec back up, which can be very slow on I2C
1158  */
1159 static void soc_resume_deferred(struct work_struct *work)
1160 {
1161         struct snd_soc_card *card =
1162                         container_of(work, struct snd_soc_card, deferred_resume_work);
1163         struct snd_soc_codec *codec;
1164         int i;
1165
1166         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1167          * so userspace apps are blocked from touching us
1168          */
1169
1170         dev_dbg(card->dev, "starting resume work\n");
1171
1172         /* Bring us up into D2 so that DAPM starts enabling things */
1173         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1174
1175         if (card->resume_pre)
1176                 card->resume_pre(card);
1177
1178         /* resume AC97 DAIs */
1179         for (i = 0; i < card->num_rtd; i++) {
1180                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1181
1182                 if (card->rtd[i].dai_link->ignore_suspend)
1183                         continue;
1184
1185                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1186                         cpu_dai->driver->resume(cpu_dai);
1187         }
1188
1189         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1190                 /* If the CODEC was idle over suspend then it will have been
1191                  * left with bias OFF or STANDBY and suspended so we must now
1192                  * resume.  Otherwise the suspend was suppressed.
1193                  */
1194                 if (codec->driver->resume && codec->suspended) {
1195                         switch (codec->dapm.bias_level) {
1196                         case SND_SOC_BIAS_STANDBY:
1197                         case SND_SOC_BIAS_OFF:
1198                                 codec->driver->resume(codec);
1199                                 codec->suspended = 0;
1200                                 break;
1201                         default:
1202                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1203                                 break;
1204                         }
1205                 }
1206         }
1207
1208         for (i = 0; i < card->num_rtd; i++) {
1209                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1210
1211                 if (card->rtd[i].dai_link->ignore_suspend)
1212                         continue;
1213
1214                 if (driver->playback.stream_name != NULL)
1215                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1216                                 SND_SOC_DAPM_STREAM_RESUME);
1217
1218                 if (driver->capture.stream_name != NULL)
1219                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1220                                 SND_SOC_DAPM_STREAM_RESUME);
1221         }
1222
1223         /* unmute any active DACs */
1224         for (i = 0; i < card->num_rtd; i++) {
1225                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1226                 struct snd_soc_dai_driver *drv = dai->driver;
1227
1228                 if (card->rtd[i].dai_link->ignore_suspend)
1229                         continue;
1230
1231                 if (drv->ops->digital_mute && dai->playback_active)
1232                         drv->ops->digital_mute(dai, 0);
1233         }
1234
1235         for (i = 0; i < card->num_rtd; i++) {
1236                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1237                 struct snd_soc_platform *platform = card->rtd[i].platform;
1238
1239                 if (card->rtd[i].dai_link->ignore_suspend)
1240                         continue;
1241
1242                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1243                         cpu_dai->driver->resume(cpu_dai);
1244                 if (platform->driver->resume && platform->suspended) {
1245                         platform->driver->resume(cpu_dai);
1246                         platform->suspended = 0;
1247                 }
1248         }
1249
1250         if (card->resume_post)
1251                 card->resume_post(card);
1252
1253         dev_dbg(card->dev, "resume work completed\n");
1254
1255         /* userspace can access us now we are back as we were before */
1256         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1257 }
1258
1259 /* powers up audio subsystem after a suspend */
1260 int snd_soc_resume(struct device *dev)
1261 {
1262         struct snd_soc_card *card = dev_get_drvdata(dev);
1263         int i;
1264
1265         /* AC97 devices might have other drivers hanging off them so
1266          * need to resume immediately.  Other drivers don't have that
1267          * problem and may take a substantial amount of time to resume
1268          * due to I/O costs and anti-pop so handle them out of line.
1269          */
1270         for (i = 0; i < card->num_rtd; i++) {
1271                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1272                 if (cpu_dai->driver->ac97_control) {
1273                         dev_dbg(dev, "Resuming AC97 immediately\n");
1274                         soc_resume_deferred(&card->deferred_resume_work);
1275                 } else {
1276                         dev_dbg(dev, "Scheduling resume work\n");
1277                         if (!schedule_work(&card->deferred_resume_work))
1278                                 dev_err(dev, "resume work item may be lost\n");
1279                 }
1280         }
1281
1282         return 0;
1283 }
1284 EXPORT_SYMBOL_GPL(snd_soc_resume);
1285 #else
1286 #define snd_soc_suspend NULL
1287 #define snd_soc_resume NULL
1288 #endif
1289
1290 static struct snd_soc_dai_ops null_dai_ops = {
1291 };
1292
1293 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1294 {
1295         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1296         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1297         struct snd_soc_codec *codec;
1298         struct snd_soc_platform *platform;
1299         struct snd_soc_dai *codec_dai, *cpu_dai;
1300
1301         if (rtd->complete)
1302                 return 1;
1303         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1304
1305         /* do we already have the CPU DAI for this link ? */
1306         if (rtd->cpu_dai) {
1307                 goto find_codec;
1308         }
1309         /* no, then find CPU DAI from registered DAIs*/
1310         list_for_each_entry(cpu_dai, &dai_list, list) {
1311                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1312
1313                         if (!try_module_get(cpu_dai->dev->driver->owner))
1314                                 return -ENODEV;
1315
1316                         rtd->cpu_dai = cpu_dai;
1317                         goto find_codec;
1318                 }
1319         }
1320         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1321                         dai_link->cpu_dai_name);
1322
1323 find_codec:
1324         /* do we already have the CODEC for this link ? */
1325         if (rtd->codec) {
1326                 goto find_platform;
1327         }
1328
1329         /* no, then find CODEC from registered CODECs*/
1330         list_for_each_entry(codec, &codec_list, list) {
1331                 if (!strcmp(codec->name, dai_link->codec_name)) {
1332                         rtd->codec = codec;
1333
1334                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1335                         list_for_each_entry(codec_dai, &dai_list, list) {
1336                                 if (codec->dev == codec_dai->dev &&
1337                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1338                                         rtd->codec_dai = codec_dai;
1339                                         goto find_platform;
1340                                 }
1341                         }
1342                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1343                                         dai_link->codec_dai_name);
1344
1345                         goto find_platform;
1346                 }
1347         }
1348         dev_dbg(card->dev, "CODEC %s not registered\n",
1349                         dai_link->codec_name);
1350
1351 find_platform:
1352         /* do we already have the CODEC DAI for this link ? */
1353         if (rtd->platform) {
1354                 goto out;
1355         }
1356         /* no, then find CPU DAI from registered DAIs*/
1357         list_for_each_entry(platform, &platform_list, list) {
1358                 if (!strcmp(platform->name, dai_link->platform_name)) {
1359                         rtd->platform = platform;
1360                         goto out;
1361                 }
1362         }
1363
1364         dev_dbg(card->dev, "platform %s not registered\n",
1365                         dai_link->platform_name);
1366         return 0;
1367
1368 out:
1369         /* mark rtd as complete if we found all 4 of our client devices */
1370         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1371                 rtd->complete = 1;
1372                 card->num_rtd++;
1373         }
1374         return 1;
1375 }
1376
1377 static void soc_remove_codec(struct snd_soc_codec *codec)
1378 {
1379         int err;
1380
1381         if (codec->driver->remove) {
1382                 err = codec->driver->remove(codec);
1383                 if (err < 0)
1384                         dev_err(codec->dev,
1385                                 "asoc: failed to remove %s: %d\n",
1386                                 codec->name, err);
1387         }
1388
1389         /* Make sure all DAPM widgets are freed */
1390         snd_soc_dapm_free(&codec->dapm);
1391
1392         soc_cleanup_codec_debugfs(codec);
1393         codec->probed = 0;
1394         list_del(&codec->card_list);
1395         module_put(codec->dev->driver->owner);
1396 }
1397
1398 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1399 {
1400         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1401         struct snd_soc_codec *codec = rtd->codec;
1402         struct snd_soc_platform *platform = rtd->platform;
1403         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1404         int err;
1405
1406         /* unregister the rtd device */
1407         if (rtd->dev_registered) {
1408                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1409                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1410                 device_unregister(&rtd->dev);
1411                 rtd->dev_registered = 0;
1412         }
1413
1414         /* remove the CODEC DAI */
1415         if (codec_dai && codec_dai->probed) {
1416                 if (codec_dai->driver->remove) {
1417                         err = codec_dai->driver->remove(codec_dai);
1418                         if (err < 0)
1419                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1420                 }
1421                 codec_dai->probed = 0;
1422                 list_del(&codec_dai->card_list);
1423         }
1424
1425         /* remove the platform */
1426         if (platform && platform->probed) {
1427                 if (platform->driver->remove) {
1428                         err = platform->driver->remove(platform);
1429                         if (err < 0)
1430                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1431                 }
1432                 platform->probed = 0;
1433                 list_del(&platform->card_list);
1434                 module_put(platform->dev->driver->owner);
1435         }
1436
1437         /* remove the CODEC */
1438         if (codec && codec->probed)
1439                 soc_remove_codec(codec);
1440
1441         /* remove the cpu_dai */
1442         if (cpu_dai && cpu_dai->probed) {
1443                 if (cpu_dai->driver->remove) {
1444                         err = cpu_dai->driver->remove(cpu_dai);
1445                         if (err < 0)
1446                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1447                 }
1448                 cpu_dai->probed = 0;
1449                 list_del(&cpu_dai->card_list);
1450                 module_put(cpu_dai->dev->driver->owner);
1451         }
1452 }
1453
1454 static void soc_set_name_prefix(struct snd_soc_card *card,
1455                                 struct snd_soc_codec *codec)
1456 {
1457         int i;
1458
1459         if (card->codec_conf == NULL)
1460                 return;
1461
1462         for (i = 0; i < card->num_configs; i++) {
1463                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1464                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1465                         codec->name_prefix = map->name_prefix;
1466                         break;
1467                 }
1468         }
1469 }
1470
1471 static int soc_probe_codec(struct snd_soc_card *card,
1472                            struct snd_soc_codec *codec)
1473 {
1474         int ret = 0;
1475         const struct snd_soc_codec_driver *driver = codec->driver;
1476
1477         codec->card = card;
1478         codec->dapm.card = card;
1479         soc_set_name_prefix(card, codec);
1480
1481         if (!try_module_get(codec->dev->driver->owner))
1482                 return -ENODEV;
1483
1484         if (driver->probe) {
1485                 ret = driver->probe(codec);
1486                 if (ret < 0) {
1487                         dev_err(codec->dev,
1488                                 "asoc: failed to probe CODEC %s: %d\n",
1489                                 codec->name, ret);
1490                         goto err_probe;
1491                 }
1492         }
1493
1494         if (driver->dapm_widgets)
1495                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1496                                           driver->num_dapm_widgets);
1497         if (driver->dapm_routes)
1498                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1499                                         driver->num_dapm_routes);
1500
1501         soc_init_codec_debugfs(codec);
1502
1503         /* mark codec as probed and add to card codec list */
1504         codec->probed = 1;
1505         list_add(&codec->card_list, &card->codec_dev_list);
1506         list_add(&codec->dapm.list, &card->dapm_list);
1507
1508         return 0;
1509
1510 err_probe:
1511         module_put(codec->dev->driver->owner);
1512
1513         return ret;
1514 }
1515
1516 static void rtd_release(struct device *dev) {}
1517
1518 static int soc_post_component_init(struct snd_soc_card *card,
1519                                    struct snd_soc_codec *codec,
1520                                    int num, int dailess)
1521 {
1522         struct snd_soc_dai_link *dai_link = NULL;
1523         struct snd_soc_aux_dev *aux_dev = NULL;
1524         struct snd_soc_pcm_runtime *rtd;
1525         const char *temp, *name;
1526         int ret = 0;
1527
1528         if (!dailess) {
1529                 dai_link = &card->dai_link[num];
1530                 rtd = &card->rtd[num];
1531                 name = dai_link->name;
1532         } else {
1533                 aux_dev = &card->aux_dev[num];
1534                 rtd = &card->rtd_aux[num];
1535                 name = aux_dev->name;
1536         }
1537         rtd->card = card;
1538
1539         /* machine controls, routes and widgets are not prefixed */
1540         temp = codec->name_prefix;
1541         codec->name_prefix = NULL;
1542
1543         /* do machine specific initialization */
1544         if (!dailess && dai_link->init)
1545                 ret = dai_link->init(rtd);
1546         else if (dailess && aux_dev->init)
1547                 ret = aux_dev->init(&codec->dapm);
1548         if (ret < 0) {
1549                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1550                 return ret;
1551         }
1552         codec->name_prefix = temp;
1553
1554         /* Make sure all DAPM widgets are instantiated */
1555         snd_soc_dapm_new_widgets(&codec->dapm);
1556
1557         /* register the rtd device */
1558         rtd->codec = codec;
1559         rtd->dev.parent = card->dev;
1560         rtd->dev.release = rtd_release;
1561         rtd->dev.init_name = name;
1562         ret = device_register(&rtd->dev);
1563         if (ret < 0) {
1564                 dev_err(card->dev,
1565                         "asoc: failed to register runtime device: %d\n", ret);
1566                 return ret;
1567         }
1568         rtd->dev_registered = 1;
1569
1570         /* add DAPM sysfs entries for this codec */
1571         ret = snd_soc_dapm_sys_add(&rtd->dev);
1572         if (ret < 0)
1573                 dev_err(codec->dev,
1574                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1575                         ret);
1576
1577         /* add codec sysfs entries */
1578         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1579         if (ret < 0)
1580                 dev_err(codec->dev,
1581                         "asoc: failed to add codec sysfs files: %d\n", ret);
1582
1583         return 0;
1584 }
1585
1586 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1587 {
1588         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1589         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1590         struct snd_soc_codec *codec = rtd->codec;
1591         struct snd_soc_platform *platform = rtd->platform;
1592         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1593         int ret;
1594
1595         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1596
1597         /* config components */
1598         codec_dai->codec = codec;
1599         cpu_dai->platform = platform;
1600         codec_dai->card = card;
1601         cpu_dai->card = card;
1602
1603         /* set default power off timeout */
1604         rtd->pmdown_time = pmdown_time;
1605
1606         /* probe the cpu_dai */
1607         if (!cpu_dai->probed) {
1608                 if (cpu_dai->driver->probe) {
1609                         ret = cpu_dai->driver->probe(cpu_dai);
1610                         if (ret < 0) {
1611                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1612                                                 cpu_dai->name);
1613                                 return ret;
1614                         }
1615                 }
1616                 cpu_dai->probed = 1;
1617                 /* mark cpu_dai as probed and add to card cpu_dai list */
1618                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1619         }
1620
1621         /* probe the CODEC */
1622         if (!codec->probed) {
1623                 ret = soc_probe_codec(card, codec);
1624                 if (ret < 0)
1625                         return ret;
1626         }
1627
1628         /* probe the platform */
1629         if (!platform->probed) {
1630                 if (!try_module_get(platform->dev->driver->owner))
1631                         return -ENODEV;
1632
1633                 if (platform->driver->probe) {
1634                         ret = platform->driver->probe(platform);
1635                         if (ret < 0) {
1636                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1637                                                 platform->name);
1638                                 module_put(platform->dev->driver->owner);
1639                                 return ret;
1640                         }
1641                 }
1642                 /* mark platform as probed and add to card platform list */
1643                 platform->probed = 1;
1644                 list_add(&platform->card_list, &card->platform_dev_list);
1645         }
1646
1647         /* probe the CODEC DAI */
1648         if (!codec_dai->probed) {
1649                 if (codec_dai->driver->probe) {
1650                         ret = codec_dai->driver->probe(codec_dai);
1651                         if (ret < 0) {
1652                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1653                                                 codec_dai->name);
1654                                 return ret;
1655                         }
1656                 }
1657
1658                 /* mark cpu_dai as probed and add to card cpu_dai list */
1659                 codec_dai->probed = 1;
1660                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1661         }
1662
1663         /* DAPM dai link stream work */
1664         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1665
1666         ret = soc_post_component_init(card, codec, num, 0);
1667         if (ret)
1668                 return ret;
1669
1670         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1671         if (ret < 0)
1672                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1673
1674         /* create the pcm */
1675         ret = soc_new_pcm(rtd, num);
1676         if (ret < 0) {
1677                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1678                 return ret;
1679         }
1680
1681         /* add platform data for AC97 devices */
1682         if (rtd->codec_dai->driver->ac97_control)
1683                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1684
1685         return 0;
1686 }
1687
1688 #ifdef CONFIG_SND_SOC_AC97_BUS
1689 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1690 {
1691         int ret;
1692
1693         /* Only instantiate AC97 if not already done by the adaptor
1694          * for the generic AC97 subsystem.
1695          */
1696         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1697                 /*
1698                  * It is possible that the AC97 device is already registered to
1699                  * the device subsystem. This happens when the device is created
1700                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1701                  * is the generic AC97 glue but others migh emerge.
1702                  *
1703                  * In those cases we don't try to register the device again.
1704                  */
1705                 if (!rtd->codec->ac97_created)
1706                         return 0;
1707
1708                 ret = soc_ac97_dev_register(rtd->codec);
1709                 if (ret < 0) {
1710                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1711                         return ret;
1712                 }
1713
1714                 rtd->codec->ac97_registered = 1;
1715         }
1716         return 0;
1717 }
1718
1719 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1720 {
1721         if (codec->ac97_registered) {
1722                 soc_ac97_dev_unregister(codec);
1723                 codec->ac97_registered = 0;
1724         }
1725 }
1726 #endif
1727
1728 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1729 {
1730         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1731         struct snd_soc_codec *codec;
1732         int ret = -ENODEV;
1733
1734         /* find CODEC from registered CODECs*/
1735         list_for_each_entry(codec, &codec_list, list) {
1736                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1737                         if (codec->probed) {
1738                                 dev_err(codec->dev,
1739                                         "asoc: codec already probed");
1740                                 ret = -EBUSY;
1741                                 goto out;
1742                         }
1743                         goto found;
1744                 }
1745         }
1746         /* codec not found */
1747         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1748         goto out;
1749
1750 found:
1751         ret = soc_probe_codec(card, codec);
1752         if (ret < 0)
1753                 return ret;
1754
1755         ret = soc_post_component_init(card, codec, num, 1);
1756
1757 out:
1758         return ret;
1759 }
1760
1761 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1762 {
1763         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1764         struct snd_soc_codec *codec = rtd->codec;
1765
1766         /* unregister the rtd device */
1767         if (rtd->dev_registered) {
1768                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1769                 device_unregister(&rtd->dev);
1770                 rtd->dev_registered = 0;
1771         }
1772
1773         if (codec && codec->probed)
1774                 soc_remove_codec(codec);
1775 }
1776
1777 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1778                                     enum snd_soc_compress_type compress_type)
1779 {
1780         int ret;
1781
1782         if (codec->cache_init)
1783                 return 0;
1784
1785         /* override the compress_type if necessary */
1786         if (compress_type && codec->compress_type != compress_type)
1787                 codec->compress_type = compress_type;
1788         ret = snd_soc_cache_init(codec);
1789         if (ret < 0) {
1790                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1791                         ret);
1792                 return ret;
1793         }
1794         codec->cache_init = 1;
1795         return 0;
1796 }
1797
1798 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1799 {
1800         struct snd_soc_codec *codec;
1801         struct snd_soc_codec_conf *codec_conf;
1802         enum snd_soc_compress_type compress_type;
1803         int ret, i;
1804
1805         mutex_lock(&card->mutex);
1806
1807         if (card->instantiated) {
1808                 mutex_unlock(&card->mutex);
1809                 return;
1810         }
1811
1812         /* bind DAIs */
1813         for (i = 0; i < card->num_links; i++)
1814                 soc_bind_dai_link(card, i);
1815
1816         /* bind completed ? */
1817         if (card->num_rtd != card->num_links) {
1818                 mutex_unlock(&card->mutex);
1819                 return;
1820         }
1821
1822         /* initialize the register cache for each available codec */
1823         list_for_each_entry(codec, &codec_list, list) {
1824                 if (codec->cache_init)
1825                         continue;
1826                 /* by default we don't override the compress_type */
1827                 compress_type = 0;
1828                 /* check to see if we need to override the compress_type */
1829                 for (i = 0; i < card->num_configs; ++i) {
1830                         codec_conf = &card->codec_conf[i];
1831                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1832                                 compress_type = codec_conf->compress_type;
1833                                 if (compress_type && compress_type
1834                                     != codec->compress_type)
1835                                         break;
1836                         }
1837                 }
1838                 ret = snd_soc_init_codec_cache(codec, compress_type);
1839                 if (ret < 0) {
1840                         mutex_unlock(&card->mutex);
1841                         return;
1842                 }
1843         }
1844
1845         /* card bind complete so register a sound card */
1846         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1847                         card->owner, 0, &card->snd_card);
1848         if (ret < 0) {
1849                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1850                         card->name);
1851                 mutex_unlock(&card->mutex);
1852                 return;
1853         }
1854         card->snd_card->dev = card->dev;
1855
1856         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1857         card->dapm.dev = card->dev;
1858         card->dapm.card = card;
1859         list_add(&card->dapm.list, &card->dapm_list);
1860
1861 #ifdef CONFIG_PM_SLEEP
1862         /* deferred resume work */
1863         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1864 #endif
1865
1866         /* initialise the sound card only once */
1867         if (card->probe) {
1868                 ret = card->probe(card);
1869                 if (ret < 0)
1870                         goto card_probe_error;
1871         }
1872
1873         for (i = 0; i < card->num_links; i++) {
1874                 ret = soc_probe_dai_link(card, i);
1875                 if (ret < 0) {
1876                         pr_err("asoc: failed to instantiate card %s: %d\n",
1877                                card->name, ret);
1878                         goto probe_dai_err;
1879                 }
1880         }
1881
1882         for (i = 0; i < card->num_aux_devs; i++) {
1883                 ret = soc_probe_aux_dev(card, i);
1884                 if (ret < 0) {
1885                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1886                                card->name, ret);
1887                         goto probe_aux_dev_err;
1888                 }
1889         }
1890
1891         if (card->dapm_widgets)
1892                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1893                                           card->num_dapm_widgets);
1894         if (card->dapm_routes)
1895                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1896                                         card->num_dapm_routes);
1897
1898 #ifdef CONFIG_DEBUG_FS
1899         card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
1900                                                      card->debugfs_card_root);
1901         if (!card->dapm.debugfs_dapm)
1902                 printk(KERN_WARNING
1903                        "Failed to create card DAPM debugfs directory\n");
1904
1905         snd_soc_dapm_debugfs_init(&card->dapm);
1906 #endif
1907
1908         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1909                  "%s",  card->name);
1910         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1911                  "%s", card->name);
1912
1913         if (card->late_probe) {
1914                 ret = card->late_probe(card);
1915                 if (ret < 0) {
1916                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1917                                 card->name, ret);
1918                         goto probe_aux_dev_err;
1919                 }
1920         }
1921
1922         ret = snd_card_register(card->snd_card);
1923         if (ret < 0) {
1924                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1925                 goto probe_aux_dev_err;
1926         }
1927
1928 #ifdef CONFIG_SND_SOC_AC97_BUS
1929         /* register any AC97 codecs */
1930         for (i = 0; i < card->num_rtd; i++) {
1931                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1932                 if (ret < 0) {
1933                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1934                         while (--i >= 0)
1935                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1936                         goto probe_aux_dev_err;
1937                 }
1938         }
1939 #endif
1940
1941         card->instantiated = 1;
1942         mutex_unlock(&card->mutex);
1943         return;
1944
1945 probe_aux_dev_err:
1946         for (i = 0; i < card->num_aux_devs; i++)
1947                 soc_remove_aux_dev(card, i);
1948
1949 probe_dai_err:
1950         for (i = 0; i < card->num_links; i++)
1951                 soc_remove_dai_link(card, i);
1952
1953 card_probe_error:
1954         if (card->remove)
1955                 card->remove(card);
1956
1957         snd_card_free(card->snd_card);
1958
1959         mutex_unlock(&card->mutex);
1960 }
1961
1962 /*
1963  * Attempt to initialise any uninitialised cards.  Must be called with
1964  * client_mutex.
1965  */
1966 static void snd_soc_instantiate_cards(void)
1967 {
1968         struct snd_soc_card *card;
1969         list_for_each_entry(card, &card_list, list)
1970                 snd_soc_instantiate_card(card);
1971 }
1972
1973 /* probes a new socdev */
1974 static int soc_probe(struct platform_device *pdev)
1975 {
1976         struct snd_soc_card *card = platform_get_drvdata(pdev);
1977         int ret = 0;
1978
1979         /*
1980          * no card, so machine driver should be registering card
1981          * we should not be here in that case so ret error
1982          */
1983         if (!card)
1984                 return -EINVAL;
1985
1986         /* Bodge while we unpick instantiation */
1987         card->dev = &pdev->dev;
1988
1989         ret = snd_soc_register_card(card);
1990         if (ret != 0) {
1991                 dev_err(&pdev->dev, "Failed to register card\n");
1992                 return ret;
1993         }
1994
1995         return 0;
1996 }
1997
1998 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1999 {
2000         int i;
2001
2002         /* make sure any delayed work runs */
2003         for (i = 0; i < card->num_rtd; i++) {
2004                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2005                 flush_delayed_work_sync(&rtd->delayed_work);
2006         }
2007
2008         /* remove auxiliary devices */
2009         for (i = 0; i < card->num_aux_devs; i++)
2010                 soc_remove_aux_dev(card, i);
2011
2012         /* remove and free each DAI */
2013         for (i = 0; i < card->num_rtd; i++)
2014                 soc_remove_dai_link(card, i);
2015
2016         soc_cleanup_card_debugfs(card);
2017
2018         /* remove the card */
2019         if (card->remove)
2020                 card->remove(card);
2021
2022         kfree(card->rtd);
2023         snd_card_free(card->snd_card);
2024         return 0;
2025
2026 }
2027
2028 /* removes a socdev */
2029 static int soc_remove(struct platform_device *pdev)
2030 {
2031         struct snd_soc_card *card = platform_get_drvdata(pdev);
2032
2033         snd_soc_unregister_card(card);
2034         return 0;
2035 }
2036
2037 int snd_soc_poweroff(struct device *dev)
2038 {
2039         struct snd_soc_card *card = dev_get_drvdata(dev);
2040         int i;
2041
2042         if (!card->instantiated)
2043                 return 0;
2044
2045         /* Flush out pmdown_time work - we actually do want to run it
2046          * now, we're shutting down so no imminent restart. */
2047         for (i = 0; i < card->num_rtd; i++) {
2048                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2049                 flush_delayed_work_sync(&rtd->delayed_work);
2050         }
2051
2052         snd_soc_dapm_shutdown(card);
2053
2054         return 0;
2055 }
2056 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2057
2058 const struct dev_pm_ops snd_soc_pm_ops = {
2059         .suspend = snd_soc_suspend,
2060         .resume = snd_soc_resume,
2061         .poweroff = snd_soc_poweroff,
2062 };
2063
2064 /* ASoC platform driver */
2065 static struct platform_driver soc_driver = {
2066         .driver         = {
2067                 .name           = "soc-audio",
2068                 .owner          = THIS_MODULE,
2069                 .pm             = &snd_soc_pm_ops,
2070         },
2071         .probe          = soc_probe,
2072         .remove         = soc_remove,
2073 };
2074
2075 /* create a new pcm */
2076 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2077 {
2078         struct snd_soc_codec *codec = rtd->codec;
2079         struct snd_soc_platform *platform = rtd->platform;
2080         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2081         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2082         struct snd_pcm *pcm;
2083         char new_name[64];
2084         int ret = 0, playback = 0, capture = 0;
2085
2086         /* check client and interface hw capabilities */
2087         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2088                         rtd->dai_link->stream_name, codec_dai->name, num);
2089
2090         if (codec_dai->driver->playback.channels_min)
2091                 playback = 1;
2092         if (codec_dai->driver->capture.channels_min)
2093                 capture = 1;
2094
2095         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2096         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2097                         num, playback, capture, &pcm);
2098         if (ret < 0) {
2099                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2100                 return ret;
2101         }
2102
2103         rtd->pcm = pcm;
2104         pcm->private_data = rtd;
2105         soc_pcm_ops.mmap = platform->driver->ops->mmap;
2106         soc_pcm_ops.pointer = platform->driver->ops->pointer;
2107         soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2108         soc_pcm_ops.copy = platform->driver->ops->copy;
2109         soc_pcm_ops.silence = platform->driver->ops->silence;
2110         soc_pcm_ops.ack = platform->driver->ops->ack;
2111         soc_pcm_ops.page = platform->driver->ops->page;
2112
2113         if (playback)
2114                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2115
2116         if (capture)
2117                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2118
2119         ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2120         if (ret < 0) {
2121                 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2122                 return ret;
2123         }
2124
2125         pcm->private_free = platform->driver->pcm_free;
2126         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2127                 cpu_dai->name);
2128         return ret;
2129 }
2130
2131 /**
2132  * snd_soc_codec_volatile_register: Report if a register is volatile.
2133  *
2134  * @codec: CODEC to query.
2135  * @reg: Register to query.
2136  *
2137  * Boolean function indiciating if a CODEC register is volatile.
2138  */
2139 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2140                                     unsigned int reg)
2141 {
2142         if (codec->volatile_register)
2143                 return codec->volatile_register(codec, reg);
2144         else
2145                 return 0;
2146 }
2147 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2148
2149 /**
2150  * snd_soc_new_ac97_codec - initailise AC97 device
2151  * @codec: audio codec
2152  * @ops: AC97 bus operations
2153  * @num: AC97 codec number
2154  *
2155  * Initialises AC97 codec resources for use by ad-hoc devices only.
2156  */
2157 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2158         struct snd_ac97_bus_ops *ops, int num)
2159 {
2160         mutex_lock(&codec->mutex);
2161
2162         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2163         if (codec->ac97 == NULL) {
2164                 mutex_unlock(&codec->mutex);
2165                 return -ENOMEM;
2166         }
2167
2168         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2169         if (codec->ac97->bus == NULL) {
2170                 kfree(codec->ac97);
2171                 codec->ac97 = NULL;
2172                 mutex_unlock(&codec->mutex);
2173                 return -ENOMEM;
2174         }
2175
2176         codec->ac97->bus->ops = ops;
2177         codec->ac97->num = num;
2178
2179         /*
2180          * Mark the AC97 device to be created by us. This way we ensure that the
2181          * device will be registered with the device subsystem later on.
2182          */
2183         codec->ac97_created = 1;
2184
2185         mutex_unlock(&codec->mutex);
2186         return 0;
2187 }
2188 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2189
2190 /**
2191  * snd_soc_free_ac97_codec - free AC97 codec device
2192  * @codec: audio codec
2193  *
2194  * Frees AC97 codec device resources.
2195  */
2196 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2197 {
2198         mutex_lock(&codec->mutex);
2199 #ifdef CONFIG_SND_SOC_AC97_BUS
2200         soc_unregister_ac97_dai_link(codec);
2201 #endif
2202         kfree(codec->ac97->bus);
2203         kfree(codec->ac97);
2204         codec->ac97 = NULL;
2205         codec->ac97_created = 0;
2206         mutex_unlock(&codec->mutex);
2207 }
2208 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2209
2210 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2211 {
2212         unsigned int ret;
2213
2214         ret = codec->read(codec, reg);
2215         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2216         trace_snd_soc_reg_read(codec, reg, ret);
2217
2218         return ret;
2219 }
2220 EXPORT_SYMBOL_GPL(snd_soc_read);
2221
2222 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2223                            unsigned int reg, unsigned int val)
2224 {
2225         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2226         trace_snd_soc_reg_write(codec, reg, val);
2227         return codec->write(codec, reg, val);
2228 }
2229 EXPORT_SYMBOL_GPL(snd_soc_write);
2230
2231 /**
2232  * snd_soc_update_bits - update codec register bits
2233  * @codec: audio codec
2234  * @reg: codec register
2235  * @mask: register mask
2236  * @value: new value
2237  *
2238  * Writes new register value.
2239  *
2240  * Returns 1 for change, 0 for no change, or negative error code.
2241  */
2242 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2243                                 unsigned int mask, unsigned int value)
2244 {
2245         int change;
2246         unsigned int old, new;
2247         int ret;
2248
2249         ret = snd_soc_read(codec, reg);
2250         if (ret < 0)
2251                 return ret;
2252
2253         old = ret;
2254         new = (old & ~mask) | value;
2255         change = old != new;
2256         if (change) {
2257                 ret = snd_soc_write(codec, reg, new);
2258                 if (ret < 0)
2259                         return ret;
2260         }
2261
2262         return change;
2263 }
2264 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2265
2266 /**
2267  * snd_soc_update_bits_locked - update codec register bits
2268  * @codec: audio codec
2269  * @reg: codec register
2270  * @mask: register mask
2271  * @value: new value
2272  *
2273  * Writes new register value, and takes the codec mutex.
2274  *
2275  * Returns 1 for change else 0.
2276  */
2277 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2278                                unsigned short reg, unsigned int mask,
2279                                unsigned int value)
2280 {
2281         int change;
2282
2283         mutex_lock(&codec->mutex);
2284         change = snd_soc_update_bits(codec, reg, mask, value);
2285         mutex_unlock(&codec->mutex);
2286
2287         return change;
2288 }
2289 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2290
2291 /**
2292  * snd_soc_test_bits - test register for change
2293  * @codec: audio codec
2294  * @reg: codec register
2295  * @mask: register mask
2296  * @value: new value
2297  *
2298  * Tests a register with a new value and checks if the new value is
2299  * different from the old value.
2300  *
2301  * Returns 1 for change else 0.
2302  */
2303 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2304                                 unsigned int mask, unsigned int value)
2305 {
2306         int change;
2307         unsigned int old, new;
2308
2309         old = snd_soc_read(codec, reg);
2310         new = (old & ~mask) | value;
2311         change = old != new;
2312
2313         return change;
2314 }
2315 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2316
2317 /**
2318  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2319  * @substream: the pcm substream
2320  * @hw: the hardware parameters
2321  *
2322  * Sets the substream runtime hardware parameters.
2323  */
2324 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2325         const struct snd_pcm_hardware *hw)
2326 {
2327         struct snd_pcm_runtime *runtime = substream->runtime;
2328         runtime->hw.info = hw->info;
2329         runtime->hw.formats = hw->formats;
2330         runtime->hw.period_bytes_min = hw->period_bytes_min;
2331         runtime->hw.period_bytes_max = hw->period_bytes_max;
2332         runtime->hw.periods_min = hw->periods_min;
2333         runtime->hw.periods_max = hw->periods_max;
2334         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2335         runtime->hw.fifo_size = hw->fifo_size;
2336         return 0;
2337 }
2338 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2339
2340 /**
2341  * snd_soc_cnew - create new control
2342  * @_template: control template
2343  * @data: control private data
2344  * @long_name: control long name
2345  * @prefix: control name prefix
2346  *
2347  * Create a new mixer control from a template control.
2348  *
2349  * Returns 0 for success, else error.
2350  */
2351 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2352                                   void *data, char *long_name,
2353                                   const char *prefix)
2354 {
2355         struct snd_kcontrol_new template;
2356         struct snd_kcontrol *kcontrol;
2357         char *name = NULL;
2358         int name_len;
2359
2360         memcpy(&template, _template, sizeof(template));
2361         template.index = 0;
2362
2363         if (!long_name)
2364                 long_name = template.name;
2365
2366         if (prefix) {
2367                 name_len = strlen(long_name) + strlen(prefix) + 2;
2368                 name = kmalloc(name_len, GFP_ATOMIC);
2369                 if (!name)
2370                         return NULL;
2371
2372                 snprintf(name, name_len, "%s %s", prefix, long_name);
2373
2374                 template.name = name;
2375         } else {
2376                 template.name = long_name;
2377         }
2378
2379         kcontrol = snd_ctl_new1(&template, data);
2380
2381         kfree(name);
2382
2383         return kcontrol;
2384 }
2385 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2386
2387 /**
2388  * snd_soc_add_controls - add an array of controls to a codec.
2389  * Convienience function to add a list of controls. Many codecs were
2390  * duplicating this code.
2391  *
2392  * @codec: codec to add controls to
2393  * @controls: array of controls to add
2394  * @num_controls: number of elements in the array
2395  *
2396  * Return 0 for success, else error.
2397  */
2398 int snd_soc_add_controls(struct snd_soc_codec *codec,
2399         const struct snd_kcontrol_new *controls, int num_controls)
2400 {
2401         struct snd_card *card = codec->card->snd_card;
2402         int err, i;
2403
2404         for (i = 0; i < num_controls; i++) {
2405                 const struct snd_kcontrol_new *control = &controls[i];
2406                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2407                                                      control->name,
2408                                                      codec->name_prefix));
2409                 if (err < 0) {
2410                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2411                                 codec->name, control->name, err);
2412                         return err;
2413                 }
2414         }
2415
2416         return 0;
2417 }
2418 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2419
2420 /**
2421  * snd_soc_info_enum_double - enumerated double mixer info callback
2422  * @kcontrol: mixer control
2423  * @uinfo: control element information
2424  *
2425  * Callback to provide information about a double enumerated
2426  * mixer control.
2427  *
2428  * Returns 0 for success.
2429  */
2430 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2431         struct snd_ctl_elem_info *uinfo)
2432 {
2433         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2434
2435         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2436         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2437         uinfo->value.enumerated.items = e->max;
2438
2439         if (uinfo->value.enumerated.item > e->max - 1)
2440                 uinfo->value.enumerated.item = e->max - 1;
2441         strcpy(uinfo->value.enumerated.name,
2442                 e->texts[uinfo->value.enumerated.item]);
2443         return 0;
2444 }
2445 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2446
2447 /**
2448  * snd_soc_get_enum_double - enumerated double mixer get callback
2449  * @kcontrol: mixer control
2450  * @ucontrol: control element information
2451  *
2452  * Callback to get the value of a double enumerated mixer.
2453  *
2454  * Returns 0 for success.
2455  */
2456 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2457         struct snd_ctl_elem_value *ucontrol)
2458 {
2459         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2460         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2461         unsigned int val, bitmask;
2462
2463         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2464                 ;
2465         val = snd_soc_read(codec, e->reg);
2466         ucontrol->value.enumerated.item[0]
2467                 = (val >> e->shift_l) & (bitmask - 1);
2468         if (e->shift_l != e->shift_r)
2469                 ucontrol->value.enumerated.item[1] =
2470                         (val >> e->shift_r) & (bitmask - 1);
2471
2472         return 0;
2473 }
2474 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2475
2476 /**
2477  * snd_soc_put_enum_double - enumerated double mixer put callback
2478  * @kcontrol: mixer control
2479  * @ucontrol: control element information
2480  *
2481  * Callback to set the value of a double enumerated mixer.
2482  *
2483  * Returns 0 for success.
2484  */
2485 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2486         struct snd_ctl_elem_value *ucontrol)
2487 {
2488         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2489         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2490         unsigned int val;
2491         unsigned int mask, bitmask;
2492
2493         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2494                 ;
2495         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2496                 return -EINVAL;
2497         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2498         mask = (bitmask - 1) << e->shift_l;
2499         if (e->shift_l != e->shift_r) {
2500                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2501                         return -EINVAL;
2502                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2503                 mask |= (bitmask - 1) << e->shift_r;
2504         }
2505
2506         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2507 }
2508 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2509
2510 /**
2511  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2512  * @kcontrol: mixer control
2513  * @ucontrol: control element information
2514  *
2515  * Callback to get the value of a double semi enumerated mixer.
2516  *
2517  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2518  * used for handling bitfield coded enumeration for example.
2519  *
2520  * Returns 0 for success.
2521  */
2522 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2523         struct snd_ctl_elem_value *ucontrol)
2524 {
2525         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2526         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2527         unsigned int reg_val, val, mux;
2528
2529         reg_val = snd_soc_read(codec, e->reg);
2530         val = (reg_val >> e->shift_l) & e->mask;
2531         for (mux = 0; mux < e->max; mux++) {
2532                 if (val == e->values[mux])
2533                         break;
2534         }
2535         ucontrol->value.enumerated.item[0] = mux;
2536         if (e->shift_l != e->shift_r) {
2537                 val = (reg_val >> e->shift_r) & e->mask;
2538                 for (mux = 0; mux < e->max; mux++) {
2539                         if (val == e->values[mux])
2540                                 break;
2541                 }
2542                 ucontrol->value.enumerated.item[1] = mux;
2543         }
2544
2545         return 0;
2546 }
2547 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2548
2549 /**
2550  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2551  * @kcontrol: mixer control
2552  * @ucontrol: control element information
2553  *
2554  * Callback to set the value of a double semi enumerated mixer.
2555  *
2556  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2557  * used for handling bitfield coded enumeration for example.
2558  *
2559  * Returns 0 for success.
2560  */
2561 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2562         struct snd_ctl_elem_value *ucontrol)
2563 {
2564         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2565         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2566         unsigned int val;
2567         unsigned int mask;
2568
2569         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2570                 return -EINVAL;
2571         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2572         mask = e->mask << e->shift_l;
2573         if (e->shift_l != e->shift_r) {
2574                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2575                         return -EINVAL;
2576                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2577                 mask |= e->mask << e->shift_r;
2578         }
2579
2580         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2581 }
2582 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2583
2584 /**
2585  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2586  * @kcontrol: mixer control
2587  * @uinfo: control element information
2588  *
2589  * Callback to provide information about an external enumerated
2590  * single mixer.
2591  *
2592  * Returns 0 for success.
2593  */
2594 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2595         struct snd_ctl_elem_info *uinfo)
2596 {
2597         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2598
2599         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2600         uinfo->count = 1;
2601         uinfo->value.enumerated.items = e->max;
2602
2603         if (uinfo->value.enumerated.item > e->max - 1)
2604                 uinfo->value.enumerated.item = e->max - 1;
2605         strcpy(uinfo->value.enumerated.name,
2606                 e->texts[uinfo->value.enumerated.item]);
2607         return 0;
2608 }
2609 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2610
2611 /**
2612  * snd_soc_info_volsw_ext - external single mixer info callback
2613  * @kcontrol: mixer control
2614  * @uinfo: control element information
2615  *
2616  * Callback to provide information about a single external mixer control.
2617  *
2618  * Returns 0 for success.
2619  */
2620 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2621         struct snd_ctl_elem_info *uinfo)
2622 {
2623         int max = kcontrol->private_value;
2624
2625         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2626                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2627         else
2628                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2629
2630         uinfo->count = 1;
2631         uinfo->value.integer.min = 0;
2632         uinfo->value.integer.max = max;
2633         return 0;
2634 }
2635 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2636
2637 /**
2638  * snd_soc_info_volsw - single mixer info callback
2639  * @kcontrol: mixer control
2640  * @uinfo: control element information
2641  *
2642  * Callback to provide information about a single mixer control.
2643  *
2644  * Returns 0 for success.
2645  */
2646 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2647         struct snd_ctl_elem_info *uinfo)
2648 {
2649         struct soc_mixer_control *mc =
2650                 (struct soc_mixer_control *)kcontrol->private_value;
2651         int platform_max;
2652         unsigned int shift = mc->shift;
2653         unsigned int rshift = mc->rshift;
2654
2655         if (!mc->platform_max)
2656                 mc->platform_max = mc->max;
2657         platform_max = mc->platform_max;
2658
2659         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2660                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2661         else
2662                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2663
2664         uinfo->count = shift == rshift ? 1 : 2;
2665         uinfo->value.integer.min = 0;
2666         uinfo->value.integer.max = platform_max;
2667         return 0;
2668 }
2669 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2670
2671 /**
2672  * snd_soc_get_volsw - single mixer get callback
2673  * @kcontrol: mixer control
2674  * @ucontrol: control element information
2675  *
2676  * Callback to get the value of a single mixer control.
2677  *
2678  * Returns 0 for success.
2679  */
2680 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2681         struct snd_ctl_elem_value *ucontrol)
2682 {
2683         struct soc_mixer_control *mc =
2684                 (struct soc_mixer_control *)kcontrol->private_value;
2685         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2686         unsigned int reg = mc->reg;
2687         unsigned int shift = mc->shift;
2688         unsigned int rshift = mc->rshift;
2689         int max = mc->max;
2690         unsigned int mask = (1 << fls(max)) - 1;
2691         unsigned int invert = mc->invert;
2692
2693         ucontrol->value.integer.value[0] =
2694                 (snd_soc_read(codec, reg) >> shift) & mask;
2695         if (shift != rshift)
2696                 ucontrol->value.integer.value[1] =
2697                         (snd_soc_read(codec, reg) >> rshift) & mask;
2698         if (invert) {
2699                 ucontrol->value.integer.value[0] =
2700                         max - ucontrol->value.integer.value[0];
2701                 if (shift != rshift)
2702                         ucontrol->value.integer.value[1] =
2703                                 max - ucontrol->value.integer.value[1];
2704         }
2705
2706         return 0;
2707 }
2708 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2709
2710 /**
2711  * snd_soc_put_volsw - single mixer put callback
2712  * @kcontrol: mixer control
2713  * @ucontrol: control element information
2714  *
2715  * Callback to set the value of a single mixer control.
2716  *
2717  * Returns 0 for success.
2718  */
2719 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2720         struct snd_ctl_elem_value *ucontrol)
2721 {
2722         struct soc_mixer_control *mc =
2723                 (struct soc_mixer_control *)kcontrol->private_value;
2724         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2725         unsigned int reg = mc->reg;
2726         unsigned int shift = mc->shift;
2727         unsigned int rshift = mc->rshift;
2728         int max = mc->max;
2729         unsigned int mask = (1 << fls(max)) - 1;
2730         unsigned int invert = mc->invert;
2731         unsigned int val, val2, val_mask;
2732
2733         val = (ucontrol->value.integer.value[0] & mask);
2734         if (invert)
2735                 val = max - val;
2736         val_mask = mask << shift;
2737         val = val << shift;
2738         if (shift != rshift) {
2739                 val2 = (ucontrol->value.integer.value[1] & mask);
2740                 if (invert)
2741                         val2 = max - val2;
2742                 val_mask |= mask << rshift;
2743                 val |= val2 << rshift;
2744         }
2745         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2746 }
2747 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2748
2749 /**
2750  * snd_soc_info_volsw_2r - double mixer info callback
2751  * @kcontrol: mixer control
2752  * @uinfo: control element information
2753  *
2754  * Callback to provide information about a double mixer control that
2755  * spans 2 codec registers.
2756  *
2757  * Returns 0 for success.
2758  */
2759 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2760         struct snd_ctl_elem_info *uinfo)
2761 {
2762         struct soc_mixer_control *mc =
2763                 (struct soc_mixer_control *)kcontrol->private_value;
2764         int platform_max;
2765
2766         if (!mc->platform_max)
2767                 mc->platform_max = mc->max;
2768         platform_max = mc->platform_max;
2769
2770         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2771                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2772         else
2773                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2774
2775         uinfo->count = 2;
2776         uinfo->value.integer.min = 0;
2777         uinfo->value.integer.max = platform_max;
2778         return 0;
2779 }
2780 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2781
2782 /**
2783  * snd_soc_get_volsw_2r - double mixer get callback
2784  * @kcontrol: mixer control
2785  * @ucontrol: control element information
2786  *
2787  * Callback to get the value of a double mixer control that spans 2 registers.
2788  *
2789  * Returns 0 for success.
2790  */
2791 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2792         struct snd_ctl_elem_value *ucontrol)
2793 {
2794         struct soc_mixer_control *mc =
2795                 (struct soc_mixer_control *)kcontrol->private_value;
2796         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2797         unsigned int reg = mc->reg;
2798         unsigned int reg2 = mc->rreg;
2799         unsigned int shift = mc->shift;
2800         int max = mc->max;
2801         unsigned int mask = (1 << fls(max)) - 1;
2802         unsigned int invert = mc->invert;
2803
2804         ucontrol->value.integer.value[0] =
2805                 (snd_soc_read(codec, reg) >> shift) & mask;
2806         ucontrol->value.integer.value[1] =
2807                 (snd_soc_read(codec, reg2) >> shift) & mask;
2808         if (invert) {
2809                 ucontrol->value.integer.value[0] =
2810                         max - ucontrol->value.integer.value[0];
2811                 ucontrol->value.integer.value[1] =
2812                         max - ucontrol->value.integer.value[1];
2813         }
2814
2815         return 0;
2816 }
2817 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2818
2819 /**
2820  * snd_soc_put_volsw_2r - double mixer set callback
2821  * @kcontrol: mixer control
2822  * @ucontrol: control element information
2823  *
2824  * Callback to set the value of a double mixer control that spans 2 registers.
2825  *
2826  * Returns 0 for success.
2827  */
2828 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2829         struct snd_ctl_elem_value *ucontrol)
2830 {
2831         struct soc_mixer_control *mc =
2832                 (struct soc_mixer_control *)kcontrol->private_value;
2833         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2834         unsigned int reg = mc->reg;
2835         unsigned int reg2 = mc->rreg;
2836         unsigned int shift = mc->shift;
2837         int max = mc->max;
2838         unsigned int mask = (1 << fls(max)) - 1;
2839         unsigned int invert = mc->invert;
2840         int err;
2841         unsigned int val, val2, val_mask;
2842
2843         val_mask = mask << shift;
2844         val = (ucontrol->value.integer.value[0] & mask);
2845         val2 = (ucontrol->value.integer.value[1] & mask);
2846
2847         if (invert) {
2848                 val = max - val;
2849                 val2 = max - val2;
2850         }
2851
2852         val = val << shift;
2853         val2 = val2 << shift;
2854
2855         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2856         if (err < 0)
2857                 return err;
2858
2859         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2860         return err;
2861 }
2862 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2863
2864 /**
2865  * snd_soc_info_volsw_s8 - signed mixer info callback
2866  * @kcontrol: mixer control
2867  * @uinfo: control element information
2868  *
2869  * Callback to provide information about a signed mixer control.
2870  *
2871  * Returns 0 for success.
2872  */
2873 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2874         struct snd_ctl_elem_info *uinfo)
2875 {
2876         struct soc_mixer_control *mc =
2877                 (struct soc_mixer_control *)kcontrol->private_value;
2878         int platform_max;
2879         int min = mc->min;
2880
2881         if (!mc->platform_max)
2882                 mc->platform_max = mc->max;
2883         platform_max = mc->platform_max;
2884
2885         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2886         uinfo->count = 2;
2887         uinfo->value.integer.min = 0;
2888         uinfo->value.integer.max = platform_max - min;
2889         return 0;
2890 }
2891 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2892
2893 /**
2894  * snd_soc_get_volsw_s8 - signed mixer get callback
2895  * @kcontrol: mixer control
2896  * @ucontrol: control element information
2897  *
2898  * Callback to get the value of a signed mixer control.
2899  *
2900  * Returns 0 for success.
2901  */
2902 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2903         struct snd_ctl_elem_value *ucontrol)
2904 {
2905         struct soc_mixer_control *mc =
2906                 (struct soc_mixer_control *)kcontrol->private_value;
2907         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2908         unsigned int reg = mc->reg;
2909         int min = mc->min;
2910         int val = snd_soc_read(codec, reg);
2911
2912         ucontrol->value.integer.value[0] =
2913                 ((signed char)(val & 0xff))-min;
2914         ucontrol->value.integer.value[1] =
2915                 ((signed char)((val >> 8) & 0xff))-min;
2916         return 0;
2917 }
2918 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2919
2920 /**
2921  * snd_soc_put_volsw_sgn - signed mixer put callback
2922  * @kcontrol: mixer control
2923  * @ucontrol: control element information
2924  *
2925  * Callback to set the value of a signed mixer control.
2926  *
2927  * Returns 0 for success.
2928  */
2929 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2930         struct snd_ctl_elem_value *ucontrol)
2931 {
2932         struct soc_mixer_control *mc =
2933                 (struct soc_mixer_control *)kcontrol->private_value;
2934         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2935         unsigned int reg = mc->reg;
2936         int min = mc->min;
2937         unsigned int val;
2938
2939         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2940         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2941
2942         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2943 }
2944 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2945
2946 /**
2947  * snd_soc_limit_volume - Set new limit to an existing volume control.
2948  *
2949  * @codec: where to look for the control
2950  * @name: Name of the control
2951  * @max: new maximum limit
2952  *
2953  * Return 0 for success, else error.
2954  */
2955 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2956         const char *name, int max)
2957 {
2958         struct snd_card *card = codec->card->snd_card;
2959         struct snd_kcontrol *kctl;
2960         struct soc_mixer_control *mc;
2961         int found = 0;
2962         int ret = -EINVAL;
2963
2964         /* Sanity check for name and max */
2965         if (unlikely(!name || max <= 0))
2966                 return -EINVAL;
2967
2968         list_for_each_entry(kctl, &card->controls, list) {
2969                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2970                         found = 1;
2971                         break;
2972                 }
2973         }
2974         if (found) {
2975                 mc = (struct soc_mixer_control *)kctl->private_value;
2976                 if (max <= mc->max) {
2977                         mc->platform_max = max;
2978                         ret = 0;
2979                 }
2980         }
2981         return ret;
2982 }
2983 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2984
2985 /**
2986  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2987  *  mixer info callback
2988  * @kcontrol: mixer control
2989  * @uinfo: control element information
2990  *
2991  * Returns 0 for success.
2992  */
2993 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2994                         struct snd_ctl_elem_info *uinfo)
2995 {
2996         struct soc_mixer_control *mc =
2997                 (struct soc_mixer_control *)kcontrol->private_value;
2998         int max = mc->max;
2999         int min = mc->min;
3000
3001         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3002         uinfo->count = 2;
3003         uinfo->value.integer.min = 0;
3004         uinfo->value.integer.max = max-min;
3005
3006         return 0;
3007 }
3008 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3009
3010 /**
3011  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3012  *  mixer get callback
3013  * @kcontrol: mixer control
3014  * @uinfo: control element information
3015  *
3016  * Returns 0 for success.
3017  */
3018 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3019                         struct snd_ctl_elem_value *ucontrol)
3020 {
3021         struct soc_mixer_control *mc =
3022                 (struct soc_mixer_control *)kcontrol->private_value;
3023         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3024         unsigned int mask = (1<<mc->shift)-1;
3025         int min = mc->min;
3026         int val = snd_soc_read(codec, mc->reg) & mask;
3027         int valr = snd_soc_read(codec, mc->rreg) & mask;
3028
3029         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3030         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3031         return 0;
3032 }
3033 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3034
3035 /**
3036  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3037  *  mixer put callback
3038  * @kcontrol: mixer control
3039  * @uinfo: control element information
3040  *
3041  * Returns 0 for success.
3042  */
3043 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3044                         struct snd_ctl_elem_value *ucontrol)
3045 {
3046         struct soc_mixer_control *mc =
3047                 (struct soc_mixer_control *)kcontrol->private_value;
3048         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3049         unsigned int mask = (1<<mc->shift)-1;
3050         int min = mc->min;
3051         int ret;
3052         unsigned int val, valr, oval, ovalr;
3053
3054         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3055         val &= mask;
3056         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3057         valr &= mask;
3058
3059         oval = snd_soc_read(codec, mc->reg) & mask;
3060         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3061
3062         ret = 0;
3063         if (oval != val) {
3064                 ret = snd_soc_write(codec, mc->reg, val);
3065                 if (ret < 0)
3066                         return ret;
3067         }
3068         if (ovalr != valr) {
3069                 ret = snd_soc_write(codec, mc->rreg, valr);
3070                 if (ret < 0)
3071                         return ret;
3072         }
3073
3074         return 0;
3075 }
3076 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3077
3078 /**
3079  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3080  * @dai: DAI
3081  * @clk_id: DAI specific clock ID
3082  * @freq: new clock frequency in Hz
3083  * @dir: new clock direction - input/output.
3084  *
3085  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3086  */
3087 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3088         unsigned int freq, int dir)
3089 {
3090         if (dai->driver && dai->driver->ops->set_sysclk)
3091                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3092         else if (dai->codec && dai->codec->driver->set_sysclk)
3093                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3094                                                       freq, dir);
3095         else
3096                 return -EINVAL;
3097 }
3098 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3099
3100 /**
3101  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3102  * @codec: CODEC
3103  * @clk_id: DAI specific clock ID
3104  * @freq: new clock frequency in Hz
3105  * @dir: new clock direction - input/output.
3106  *
3107  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3108  */
3109 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3110         unsigned int freq, int dir)
3111 {
3112         if (codec->driver->set_sysclk)
3113                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3114         else
3115                 return -EINVAL;
3116 }
3117 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3118
3119 /**
3120  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3121  * @dai: DAI
3122  * @div_id: DAI specific clock divider ID
3123  * @div: new clock divisor.
3124  *
3125  * Configures the clock dividers. This is used to derive the best DAI bit and
3126  * frame clocks from the system or master clock. It's best to set the DAI bit
3127  * and frame clocks as low as possible to save system power.
3128  */
3129 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3130         int div_id, int div)
3131 {
3132         if (dai->driver && dai->driver->ops->set_clkdiv)
3133                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3134         else
3135                 return -EINVAL;
3136 }
3137 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3138
3139 /**
3140  * snd_soc_dai_set_pll - configure DAI PLL.
3141  * @dai: DAI
3142  * @pll_id: DAI specific PLL ID
3143  * @source: DAI specific source for the PLL
3144  * @freq_in: PLL input clock frequency in Hz
3145  * @freq_out: requested PLL output clock frequency in Hz
3146  *
3147  * Configures and enables PLL to generate output clock based on input clock.
3148  */
3149 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3150         unsigned int freq_in, unsigned int freq_out)
3151 {
3152         if (dai->driver && dai->driver->ops->set_pll)
3153                 return dai->driver->ops->set_pll(dai, pll_id, source,
3154                                          freq_in, freq_out);
3155         else if (dai->codec && dai->codec->driver->set_pll)
3156                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3157                                                    freq_in, freq_out);
3158         else
3159                 return -EINVAL;
3160 }
3161 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3162
3163 /*
3164  * snd_soc_codec_set_pll - configure codec PLL.
3165  * @codec: CODEC
3166  * @pll_id: DAI specific PLL ID
3167  * @source: DAI specific source for the PLL
3168  * @freq_in: PLL input clock frequency in Hz
3169  * @freq_out: requested PLL output clock frequency in Hz
3170  *
3171  * Configures and enables PLL to generate output clock based on input clock.
3172  */
3173 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3174                           unsigned int freq_in, unsigned int freq_out)
3175 {
3176         if (codec->driver->set_pll)
3177                 return codec->driver->set_pll(codec, pll_id, source,
3178                                               freq_in, freq_out);
3179         else
3180                 return -EINVAL;
3181 }
3182 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3183
3184 /**
3185  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3186  * @dai: DAI
3187  * @fmt: SND_SOC_DAIFMT_ format value.
3188  *
3189  * Configures the DAI hardware format and clocking.
3190  */
3191 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3192 {
3193         if (dai->driver && dai->driver->ops->set_fmt)
3194                 return dai->driver->ops->set_fmt(dai, fmt);
3195         else
3196                 return -EINVAL;
3197 }
3198 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3199
3200 /**
3201  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3202  * @dai: DAI
3203  * @tx_mask: bitmask representing active TX slots.
3204  * @rx_mask: bitmask representing active RX slots.
3205  * @slots: Number of slots in use.
3206  * @slot_width: Width in bits for each slot.
3207  *
3208  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3209  * specific.
3210  */
3211 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3212         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3213 {
3214         if (dai->driver && dai->driver->ops->set_tdm_slot)
3215                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3216                                 slots, slot_width);
3217         else
3218                 return -EINVAL;
3219 }
3220 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3221
3222 /**
3223  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3224  * @dai: DAI
3225  * @tx_num: how many TX channels
3226  * @tx_slot: pointer to an array which imply the TX slot number channel
3227  *           0~num-1 uses
3228  * @rx_num: how many RX channels
3229  * @rx_slot: pointer to an array which imply the RX slot number channel
3230  *           0~num-1 uses
3231  *
3232  * configure the relationship between channel number and TDM slot number.
3233  */
3234 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3235         unsigned int tx_num, unsigned int *tx_slot,
3236         unsigned int rx_num, unsigned int *rx_slot)
3237 {
3238         if (dai->driver && dai->driver->ops->set_channel_map)
3239                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3240                         rx_num, rx_slot);
3241         else
3242                 return -EINVAL;
3243 }
3244 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3245
3246 /**
3247  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3248  * @dai: DAI
3249  * @tristate: tristate enable
3250  *
3251  * Tristates the DAI so that others can use it.
3252  */
3253 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3254 {
3255         if (dai->driver && dai->driver->ops->set_tristate)
3256                 return dai->driver->ops->set_tristate(dai, tristate);
3257         else
3258                 return -EINVAL;
3259 }
3260 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3261
3262 /**