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 snd_soc_register_card(struct snd_soc_card *card);
  62 static int snd_soc_unregister_card(struct snd_soc_card *card);
  63 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
  64
  65 /*
  66  * This is a timeout to do a DAPM powerdown after a stream is closed().
  67  * It can be used to eliminate pops between different playback streams, e.g.
  68  * between two audio tracks.
  69  */
  70 static int pmdown_time = 5000;
  71 module_param(pmdown_time, int, 0);
  72 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  73
  74 /* codec register dump */
  75 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
  76 {
  77         int ret, i, step = 1, count = 0;
  78
  79         if (!codec->driver->reg_cache_size)
  80                 return 0;
  81
  82         if (codec->driver->reg_cache_step)
  83                 step = codec->driver->reg_cache_step;
  84
  85         count += sprintf(buf, "%s registers\n", codec->name);
  86         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
  87                 if (codec->driver->readable_register && !codec->driver->readable_register(codec, i))
  88                         continue;
  89
  90                 count += sprintf(buf + count, "%2x: ", i);
  91                 if (count >= PAGE_SIZE - 1)
  92                         break;
  93
  94                 if (codec->driver->display_register) {
  95                         count += codec->driver->display_register(codec, buf + count,
  96                                                          PAGE_SIZE - count, i);
  97                 } else {
  98                         /* If the read fails it's almost certainly due to
  99                          * the register being volatile and the device being
 100                          * powered off.
 101                          */
 102                         ret = snd_soc_read(codec, i);
 103                         if (ret >= 0)
 104                                 count += snprintf(buf + count,
 105                                                   PAGE_SIZE - count,
 106                                                   "%4x", ret);
 107                         else
 108                                 count += snprintf(buf + count,
 109                                                   PAGE_SIZE - count,
 110                                                   "<no data: %d>", ret);
 111                 }
 112
 113                 if (count >= PAGE_SIZE - 1)
 114                         break;
 115
 116                 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
 117                 if (count >= PAGE_SIZE - 1)
 118                         break;
 119         }
 120
 121         /* Truncate count; min() would cause a warning */
 122         if (count >= PAGE_SIZE)
 123                 count = PAGE_SIZE - 1;
 124
 125         return count;
 126 }
 127 static ssize_t codec_reg_show(struct device *dev,
 128         struct device_attribute *attr, char *buf)
 129 {
 130         struct snd_soc_pcm_runtime *rtd =
 131                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 132
 133         return soc_codec_reg_show(rtd->codec, buf);
 134 }
 135
 136 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 137
 138 static ssize_t pmdown_time_show(struct device *dev,
 139                                 struct device_attribute *attr, char *buf)
 140 {
 141         struct snd_soc_pcm_runtime *rtd =
 142                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 143
 144         return sprintf(buf, "%ld\n", rtd->pmdown_time);
 145 }
 146
 147 static ssize_t pmdown_time_set(struct device *dev,
 148                                struct device_attribute *attr,
 149                                const char *buf, size_t count)
 150 {
 151         struct snd_soc_pcm_runtime *rtd =
 152                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 153         int ret;
 154
 155         ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 156         if (ret)
 157                 return ret;
 158
 159         return count;
 160 }
 161
 162 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 163
 164 #ifdef CONFIG_DEBUG_FS
 165 static int codec_reg_open_file(struct inode *inode, struct file *file)
 166 {
 167         file->private_data = inode->i_private;
 168         return 0;
 169 }
 170
 171 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 172                                size_t count, loff_t *ppos)
 173 {
 174         ssize_t ret;
 175         struct snd_soc_codec *codec = file->private_data;
 176         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 177         if (!buf)
 178                 return -ENOMEM;
 179         ret = soc_codec_reg_show(codec, buf);
 180         if (ret >= 0)
 181                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 182         kfree(buf);
 183         return ret;
 184 }
 185
 186 static ssize_t codec_reg_write_file(struct file *file,
 187                 const char __user *user_buf, size_t count, loff_t *ppos)
 188 {
 189         char buf[32];
 190         int buf_size;
 191         char *start = buf;
 192         unsigned long reg, value;
 193         int step = 1;
 194         struct snd_soc_codec *codec = file->private_data;
 195
 196         buf_size = min(count, (sizeof(buf)-1));
 197         if (copy_from_user(buf, user_buf, buf_size))
 198                 return -EFAULT;
 199         buf[buf_size] = 0;
 200
 201         if (codec->driver->reg_cache_step)
 202                 step = codec->driver->reg_cache_step;
 203
 204         while (*start == ' ')
 205                 start++;
 206         reg = simple_strtoul(start, &start, 16);
 207         if ((reg >= codec->driver->reg_cache_size) || (reg % step))
 208                 return -EINVAL;
 209         while (*start == ' ')
 210                 start++;
 211         if (strict_strtoul(start, 16, &value))
 212                 return -EINVAL;
 213
 214         /* Userspace has been fiddling around behind the kernel's back */
 215         add_taint(TAINT_USER);
 216
 217         snd_soc_write(codec, reg, value);
 218         return buf_size;
 219 }
 220
 221 static const struct file_operations codec_reg_fops = {
 222         .open = codec_reg_open_file,
 223         .read = codec_reg_read_file,
 224         .write = codec_reg_write_file,
 225         .llseek = default_llseek,
 226 };
 227
 228 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 229 {
 230         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 231
 232         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 233                                                        debugfs_card_root);
 234         if (!codec->debugfs_codec_root) {
 235                 printk(KERN_WARNING
 236                        "ASoC: Failed to create codec debugfs directory\n");
 237                 return;
 238         }
 239
 240         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 241                                                  codec->debugfs_codec_root,
 242                                                  codec, &codec_reg_fops);
 243         if (!codec->debugfs_reg)
 244                 printk(KERN_WARNING
 245                        "ASoC: Failed to create codec register debugfs file\n");
 246
 247         codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
 248                                                  codec->debugfs_codec_root);
 249         if (!codec->dapm.debugfs_dapm)
 250                 printk(KERN_WARNING
 251                        "Failed to create DAPM debugfs directory\n");
 252
 253         snd_soc_dapm_debugfs_init(&codec->dapm);
 254 }
 255
 256 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 257 {
 258         debugfs_remove_recursive(codec->debugfs_codec_root);
 259 }
 260
 261 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 262                                     size_t count, loff_t *ppos)
 263 {
 264         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 265         ssize_t len, ret = 0;
 266         struct snd_soc_codec *codec;
 267
 268         if (!buf)
 269                 return -ENOMEM;
 270
 271         list_for_each_entry(codec, &codec_list, list) {
 272                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 273                                codec->name);
 274                 if (len >= 0)
 275                         ret += len;
 276                 if (ret > PAGE_SIZE) {
 277                         ret = PAGE_SIZE;
 278                         break;
 279                 }
 280         }
 281
 282         if (ret >= 0)
 283                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 284
 285         kfree(buf);
 286
 287         return ret;
 288 }
 289
 290 static const struct file_operations codec_list_fops = {
 291         .read = codec_list_read_file,
 292         .llseek = default_llseek,/* read accesses f_pos */
 293 };
 294
 295 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 296                                   size_t count, loff_t *ppos)
 297 {
 298         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 299         ssize_t len, ret = 0;
 300         struct snd_soc_dai *dai;
 301
 302         if (!buf)
 303                 return -ENOMEM;
 304
 305         list_for_each_entry(dai, &dai_list, list) {
 306                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 307                 if (len >= 0)
 308                         ret += len;
 309                 if (ret > PAGE_SIZE) {
 310                         ret = PAGE_SIZE;
 311                         break;
 312                 }
 313         }
 314
 315         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 316
 317         kfree(buf);
 318
 319         return ret;
 320 }
 321
 322 static const struct file_operations dai_list_fops = {
 323         .read = dai_list_read_file,
 324         .llseek = default_llseek,/* read accesses f_pos */
 325 };
 326
 327 static ssize_t platform_list_read_file(struct file *file,
 328                                        char __user *user_buf,
 329                                        size_t count, loff_t *ppos)
 330 {
 331         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 332         ssize_t len, ret = 0;
 333         struct snd_soc_platform *platform;
 334
 335         if (!buf)
 336                 return -ENOMEM;
 337
 338         list_for_each_entry(platform, &platform_list, list) {
 339                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 340                                platform->name);
 341                 if (len >= 0)
 342                         ret += len;
 343                 if (ret > PAGE_SIZE) {
 344                         ret = PAGE_SIZE;
 345                         break;
 346                 }
 347         }
 348
 349         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 350
 351         kfree(buf);
 352
 353         return ret;
 354 }
 355
 356 static const struct file_operations platform_list_fops = {
 357         .read = platform_list_read_file,
 358         .llseek = default_llseek,/* read accesses f_pos */
 359 };
 360
 361 static void soc_init_card_debugfs(struct snd_soc_card *card)
 362 {
 363         card->debugfs_card_root = debugfs_create_dir(card->name,
 364                                                      snd_soc_debugfs_root);
 365         if (!card->debugfs_card_root) {
 366                 dev_warn(card->dev,
 367                          "ASoC: Failed to create codec debugfs directory\n");
 368                 return;
 369         }
 370
 371         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 372                                                     card->debugfs_card_root,
 373                                                     &card->pop_time);
 374         if (!card->debugfs_pop_time)
 375                 dev_warn(card->dev,
 376                        "Failed to create pop time debugfs file\n");
 377 }
 378
 379 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 380 {
 381         debugfs_remove_recursive(card->debugfs_card_root);
 382 }
 383
 384 #else
 385
 386 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 387 {
 388 }
 389
 390 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 391 {
 392 }
 393
 394 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 395 {
 396 }
 397
 398 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 399 {
 400 }
 401 #endif
 402
 403 #ifdef CONFIG_SND_SOC_AC97_BUS
 404 /* unregister ac97 codec */
 405 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 406 {
 407         if (codec->ac97->dev.bus)
 408                 device_unregister(&codec->ac97->dev);
 409         return 0;
 410 }
 411
 412 /* stop no dev release warning */
 413 static void soc_ac97_device_release(struct device *dev){}
 414
 415 /* register ac97 codec to bus */
 416 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 417 {
 418         int err;
 419
 420         codec->ac97->dev.bus = &ac97_bus_type;
 421         codec->ac97->dev.parent = codec->card->dev;
 422         codec->ac97->dev.release = soc_ac97_device_release;
 423
 424         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 425                      codec->card->snd_card->number, 0, codec->name);
 426         err = device_register(&codec->ac97->dev);
 427         if (err < 0) {
 428                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
 429                 codec->ac97->dev.bus = NULL;
 430                 return err;
 431         }
 432         return 0;
 433 }
 434 #endif
 435
 436 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 437 {
 438         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 439         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 440         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 441         int ret;
 442
 443         if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
 444                         rtd->dai_link->symmetric_rates) {
 445                 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
 446                                 rtd->rate);
 447
 448                 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 449                                                    SNDRV_PCM_HW_PARAM_RATE,
 450                                                    rtd->rate,
 451                                                    rtd->rate);
 452                 if (ret < 0) {
 453                         dev_err(&rtd->dev,
 454                                 "Unable to apply rate symmetry constraint: %d\n", ret);
 455                         return ret;
 456                 }
 457         }
 458
 459         return 0;
 460 }
 461
 462 /*
 463  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 464  * then initialized and any private data can be allocated. This also calls
 465  * startup for the cpu DAI, platform, machine and codec DAI.
 466  */
 467 static int soc_pcm_open(struct snd_pcm_substream *substream)
 468 {
 469         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 470         struct snd_pcm_runtime *runtime = substream->runtime;
 471         struct snd_soc_platform *platform = rtd->platform;
 472         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 473         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 474         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 475         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 476         int ret = 0;
 477
 478         mutex_lock(&pcm_mutex);
 479
 480         /* startup the audio subsystem */
 481         if (cpu_dai->driver->ops->startup) {
 482                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 483                 if (ret < 0) {
 484                         printk(KERN_ERR "asoc: can't open interface %s\n",
 485                                 cpu_dai->name);
 486                         goto out;
 487                 }
 488         }
 489
 490         if (platform->driver->ops->open) {
 491                 ret = platform->driver->ops->open(substream);
 492                 if (ret < 0) {
 493                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
 494                         goto platform_err;
 495                 }
 496         }
 497
 498         if (codec_dai->driver->ops->startup) {
 499                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 500                 if (ret < 0) {
 501                         printk(KERN_ERR "asoc: can't open codec %s\n",
 502                                 codec_dai->name);
 503                         goto codec_dai_err;
 504                 }
 505         }
 506
 507         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 508                 ret = rtd->dai_link->ops->startup(substream);
 509                 if (ret < 0) {
 510                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
 511                         goto machine_err;
 512                 }
 513         }
 514
 515         /* Check that the codec and cpu DAIs are compatible */
 516         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 517                 runtime->hw.rate_min =
 518                         max(codec_dai_drv->playback.rate_min,
 519                             cpu_dai_drv->playback.rate_min);
 520                 runtime->hw.rate_max =
 521                         min(codec_dai_drv->playback.rate_max,
 522                             cpu_dai_drv->playback.rate_max);
 523                 runtime->hw.channels_min =
 524                         max(codec_dai_drv->playback.channels_min,
 525                                 cpu_dai_drv->playback.channels_min);
 526                 runtime->hw.channels_max =
 527                         min(codec_dai_drv->playback.channels_max,
 528                                 cpu_dai_drv->playback.channels_max);
 529                 runtime->hw.formats =
 530                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 531                 runtime->hw.rates =
 532                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 533                 if (codec_dai_drv->playback.rates
 534                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 535                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 536                 if (cpu_dai_drv->playback.rates
 537                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 538                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 539         } else {
 540                 runtime->hw.rate_min =
 541                         max(codec_dai_drv->capture.rate_min,
 542                             cpu_dai_drv->capture.rate_min);
 543                 runtime->hw.rate_max =
 544                         min(codec_dai_drv->capture.rate_max,
 545                             cpu_dai_drv->capture.rate_max);
 546                 runtime->hw.channels_min =
 547                         max(codec_dai_drv->capture.channels_min,
 548                                 cpu_dai_drv->capture.channels_min);
 549                 runtime->hw.channels_max =
 550                         min(codec_dai_drv->capture.channels_max,
 551                                 cpu_dai_drv->capture.channels_max);
 552                 runtime->hw.formats =
 553                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 554                 runtime->hw.rates =
 555                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 556                 if (codec_dai_drv->capture.rates
 557                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 558                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 559                 if (cpu_dai_drv->capture.rates
 560                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 561                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 562         }
 563
 564         snd_pcm_limit_hw_rates(runtime);
 565         if (!runtime->hw.rates) {
 566                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 567                         codec_dai->name, cpu_dai->name);
 568                 goto config_err;
 569         }
 570         if (!runtime->hw.formats) {
 571                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 572                         codec_dai->name, cpu_dai->name);
 573                 goto config_err;
 574         }
 575         if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
 576                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 577                                 codec_dai->name, cpu_dai->name);
 578                 goto config_err;
 579         }
 580
 581         /* Symmetry only applies if we've already got an active stream. */
 582         if (cpu_dai->active || codec_dai->active) {
 583                 ret = soc_pcm_apply_symmetry(substream);
 584                 if (ret != 0)
 585                         goto config_err;
 586         }
 587
 588         pr_debug("asoc: %s <-> %s info:\n",
 589                         codec_dai->name, cpu_dai->name);
 590         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 591         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 592                  runtime->hw.channels_max);
 593         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 594                  runtime->hw.rate_max);
 595
 596         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 597                 cpu_dai->playback_active++;
 598                 codec_dai->playback_active++;
 599         } else {
 600                 cpu_dai->capture_active++;
 601                 codec_dai->capture_active++;
 602         }
 603         cpu_dai->active++;
 604         codec_dai->active++;
 605         rtd->codec->active++;
 606         mutex_unlock(&pcm_mutex);
 607         return 0;
 608
 609 config_err:
 610         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 611                 rtd->dai_link->ops->shutdown(substream);
 612
 613 machine_err:
 614         if (codec_dai->driver->ops->shutdown)
 615                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 616
 617 codec_dai_err:
 618         if (platform->driver->ops->close)
 619                 platform->driver->ops->close(substream);
 620
 621 platform_err:
 622         if (cpu_dai->driver->ops->shutdown)
 623                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 624 out:
 625         mutex_unlock(&pcm_mutex);
 626         return ret;
 627 }
 628
 629 /*
 630  * Power down the audio subsystem pmdown_time msecs after close is called.
 631  * This is to ensure there are no pops or clicks in between any music tracks
 632  * due to DAPM power cycling.
 633  */
 634 static void close_delayed_work(struct work_struct *work)
 635 {
 636         struct snd_soc_pcm_runtime *rtd =
 637                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 638         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 639
 640         mutex_lock(&pcm_mutex);
 641
 642         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 643                  codec_dai->driver->playback.stream_name,
 644                  codec_dai->playback_active ? "active" : "inactive",
 645                  codec_dai->pop_wait ? "yes" : "no");
 646
 647         /* are we waiting on this codec DAI stream */
 648         if (codec_dai->pop_wait == 1) {
 649                 codec_dai->pop_wait = 0;
 650                 snd_soc_dapm_stream_event(rtd,
 651                         codec_dai->driver->playback.stream_name,
 652                         SND_SOC_DAPM_STREAM_STOP);
 653         }
 654
 655         mutex_unlock(&pcm_mutex);
 656 }
 657
 658 /*
 659  * Called by ALSA when a PCM substream is closed. Private data can be
 660  * freed here. The cpu DAI, codec DAI, machine and platform are also
 661  * shutdown.
 662  */
 663 static int soc_codec_close(struct snd_pcm_substream *substream)
 664 {
 665         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 666         struct snd_soc_platform *platform = rtd->platform;
 667         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 668         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 669         struct snd_soc_codec *codec = rtd->codec;
 670
 671         mutex_lock(&pcm_mutex);
 672
 673         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 674                 cpu_dai->playback_active--;
 675                 codec_dai->playback_active--;
 676         } else {
 677                 cpu_dai->capture_active--;
 678                 codec_dai->capture_active--;
 679         }
 680
 681         cpu_dai->active--;
 682         codec_dai->active--;
 683         codec->active--;
 684
 685         /* Muting the DAC suppresses artifacts caused during digital
 686          * shutdown, for example from stopping clocks.
 687          */
 688         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 689                 snd_soc_dai_digital_mute(codec_dai, 1);
 690
 691         if (cpu_dai->driver->ops->shutdown)
 692                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 693
 694         if (codec_dai->driver->ops->shutdown)
 695                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 696
 697         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 698                 rtd->dai_link->ops->shutdown(substream);
 699
 700         if (platform->driver->ops->close)
 701                 platform->driver->ops->close(substream);
 702         cpu_dai->runtime = NULL;
 703
 704         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 705                 /* start delayed pop wq here for playback streams */
 706                 codec_dai->pop_wait = 1;
 707                 schedule_delayed_work(&rtd->delayed_work,
 708                         msecs_to_jiffies(rtd->pmdown_time));
 709         } else {
 710                 /* capture streams can be powered down now */
 711                 snd_soc_dapm_stream_event(rtd,
 712                         codec_dai->driver->capture.stream_name,
 713                         SND_SOC_DAPM_STREAM_STOP);
 714         }
 715
 716         mutex_unlock(&pcm_mutex);
 717         return 0;
 718 }
 719
 720 /*
 721  * Called by ALSA when the PCM substream is prepared, can set format, sample
 722  * rate, etc.  This function is non atomic and can be called multiple times,
 723  * it can refer to the runtime info.
 724  */
 725 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 726 {
 727         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 728         struct snd_soc_platform *platform = rtd->platform;
 729         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 730         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 731         int ret = 0;
 732
 733         mutex_lock(&pcm_mutex);
 734
 735         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 736                 ret = rtd->dai_link->ops->prepare(substream);
 737                 if (ret < 0) {
 738                         printk(KERN_ERR "asoc: machine prepare error\n");
 739                         goto out;
 740                 }
 741         }
 742
 743         if (platform->driver->ops->prepare) {
 744                 ret = platform->driver->ops->prepare(substream);
 745                 if (ret < 0) {
 746                         printk(KERN_ERR "asoc: platform prepare error\n");
 747                         goto out;
 748                 }
 749         }
 750
 751         if (codec_dai->driver->ops->prepare) {
 752                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 753                 if (ret < 0) {
 754                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
 755                         goto out;
 756                 }
 757         }
 758
 759         if (cpu_dai->driver->ops->prepare) {
 760                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 761                 if (ret < 0) {
 762                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
 763                         goto out;
 764                 }
 765         }
 766
 767         /* cancel any delayed stream shutdown that is pending */
 768         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 769             codec_dai->pop_wait) {
 770                 codec_dai->pop_wait = 0;
 771                 cancel_delayed_work(&rtd->delayed_work);
 772         }
 773
 774         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 775                 snd_soc_dapm_stream_event(rtd,
 776                                           codec_dai->driver->playback.stream_name,
 777                                           SND_SOC_DAPM_STREAM_START);
 778         else
 779                 snd_soc_dapm_stream_event(rtd,
 780                                           codec_dai->driver->capture.stream_name,
 781                                           SND_SOC_DAPM_STREAM_START);
 782
 783         snd_soc_dai_digital_mute(codec_dai, 0);
 784
 785 out:
 786         mutex_unlock(&pcm_mutex);
 787         return ret;
 788 }
 789
 790 /*
 791  * Called by ALSA when the hardware params are set by application. This
 792  * function can also be called multiple times and can allocate buffers
 793  * (using snd_pcm_lib_* ). It's non-atomic.
 794  */
 795 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 796                                 struct snd_pcm_hw_params *params)
 797 {
 798         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 799         struct snd_soc_platform *platform = rtd->platform;
 800         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 801         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 802         int ret = 0;
 803
 804         mutex_lock(&pcm_mutex);
 805
 806         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 807                 ret = rtd->dai_link->ops->hw_params(substream, params);
 808                 if (ret < 0) {
 809                         printk(KERN_ERR "asoc: machine hw_params failed\n");
 810                         goto out;
 811                 }
 812         }
 813
 814         if (codec_dai->driver->ops->hw_params) {
 815                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 816                 if (ret < 0) {
 817                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
 818                                 codec_dai->name);
 819                         goto codec_err;
 820                 }
 821         }
 822
 823         if (cpu_dai->driver->ops->hw_params) {
 824                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 825                 if (ret < 0) {
 826                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
 827                                 cpu_dai->name);
 828                         goto interface_err;
 829                 }
 830         }
 831
 832         if (platform->driver->ops->hw_params) {
 833                 ret = platform->driver->ops->hw_params(substream, params);
 834                 if (ret < 0) {
 835                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
 836                                 platform->name);
 837                         goto platform_err;
 838                 }
 839         }
 840
 841         rtd->rate = params_rate(params);
 842
 843 out:
 844         mutex_unlock(&pcm_mutex);
 845         return ret;
 846
 847 platform_err:
 848         if (cpu_dai->driver->ops->hw_free)
 849                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 850
 851 interface_err:
 852         if (codec_dai->driver->ops->hw_free)
 853                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 854
 855 codec_err:
 856         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 857                 rtd->dai_link->ops->hw_free(substream);
 858
 859         mutex_unlock(&pcm_mutex);
 860         return ret;
 861 }
 862
 863 /*
 864  * Frees resources allocated by hw_params, can be called multiple times
 865  */
 866 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 867 {
 868         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 869         struct snd_soc_platform *platform = rtd->platform;
 870         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 871         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 872         struct snd_soc_codec *codec = rtd->codec;
 873
 874         mutex_lock(&pcm_mutex);
 875
 876         /* apply codec digital mute */
 877         if (!codec->active)
 878                 snd_soc_dai_digital_mute(codec_dai, 1);
 879
 880         /* free any machine hw params */
 881         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 882                 rtd->dai_link->ops->hw_free(substream);
 883
 884         /* free any DMA resources */
 885         if (platform->driver->ops->hw_free)
 886                 platform->driver->ops->hw_free(substream);
 887
 888         /* now free hw params for the DAIs  */
 889         if (codec_dai->driver->ops->hw_free)
 890                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 891
 892         if (cpu_dai->driver->ops->hw_free)
 893                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 894
 895         mutex_unlock(&pcm_mutex);
 896         return 0;
 897 }
 898
 899 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 900 {
 901         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 902         struct snd_soc_platform *platform = rtd->platform;
 903         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 904         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 905         int ret;
 906
 907         if (codec_dai->driver->ops->trigger) {
 908                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 909                 if (ret < 0)
 910                         return ret;
 911         }
 912
 913         if (platform->driver->ops->trigger) {
 914                 ret = platform->driver->ops->trigger(substream, cmd);
 915                 if (ret < 0)
 916                         return ret;
 917         }
 918
 919         if (cpu_dai->driver->ops->trigger) {
 920                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 921                 if (ret < 0)
 922                         return ret;
 923         }
 924         return 0;
 925 }
 926
 927 /*
 928  * soc level wrapper for pointer callback
 929  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 930  * the runtime->delay will be updated accordingly.
 931  */
 932 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 933 {
 934         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 935         struct snd_soc_platform *platform = rtd->platform;
 936         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 937         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 938         struct snd_pcm_runtime *runtime = substream->runtime;
 939         snd_pcm_uframes_t offset = 0;
 940         snd_pcm_sframes_t delay = 0;
 941
 942         if (platform->driver->ops->pointer)
 943                 offset = platform->driver->ops->pointer(substream);
 944
 945         if (cpu_dai->driver->ops->delay)
 946                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
 947
 948         if (codec_dai->driver->ops->delay)
 949                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
 950
 951         if (platform->driver->delay)
 952                 delay += platform->driver->delay(substream, codec_dai);
 953
 954         runtime->delay = delay;
 955
 956         return offset;
 957 }
 958
 959 /* ASoC PCM operations */
 960 static struct snd_pcm_ops soc_pcm_ops = {
 961         .open           = soc_pcm_open,
 962         .close          = soc_codec_close,
 963         .hw_params      = soc_pcm_hw_params,
 964         .hw_free        = soc_pcm_hw_free,
 965         .prepare        = soc_pcm_prepare,
 966         .trigger        = soc_pcm_trigger,
 967         .pointer        = soc_pcm_pointer,
 968 };
 969
 970 #ifdef CONFIG_PM
 971 /* powers down audio subsystem for suspend */
 972 static int soc_suspend(struct device *dev)
 973 {
 974         struct platform_device *pdev = to_platform_device(dev);
 975         struct snd_soc_card *card = platform_get_drvdata(pdev);
 976         struct snd_soc_codec *codec;
 977         int i;
 978
 979         /* If the initialization of this soc device failed, there is no codec
 980          * associated with it. Just bail out in this case.
 981          */
 982         if (list_empty(&card->codec_dev_list))
 983                 return 0;
 984
 985         /* Due to the resume being scheduled into a workqueue we could
 986         * suspend before that's finished - wait for it to complete.
 987          */
 988         snd_power_lock(card->snd_card);
 989         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
 990         snd_power_unlock(card->snd_card);
 991
 992         /* we're going to block userspace touching us until resume completes */
 993         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
 994
 995         /* mute any active DACs */
 996         for (i = 0; i < card->num_rtd; i++) {
 997                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
 998                 struct snd_soc_dai_driver *drv = dai->driver;
 999
1000                 if (card->rtd[i].dai_link->ignore_suspend)
1001                         continue;
1002
1003                 if (drv->ops->digital_mute && dai->playback_active)
1004                         drv->ops->digital_mute(dai, 1);
1005         }
1006
1007         /* suspend all pcms */
1008         for (i = 0; i < card->num_rtd; i++) {
1009                 if (card->rtd[i].dai_link->ignore_suspend)
1010                         continue;
1011
1012                 snd_pcm_suspend_all(card->rtd[i].pcm);
1013         }
1014
1015         if (card->suspend_pre)
1016                 card->suspend_pre(pdev, PMSG_SUSPEND);
1017
1018         for (i = 0; i < card->num_rtd; i++) {
1019                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1020                 struct snd_soc_platform *platform = card->rtd[i].platform;
1021
1022                 if (card->rtd[i].dai_link->ignore_suspend)
1023                         continue;
1024
1025                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1026                         cpu_dai->driver->suspend(cpu_dai);
1027                 if (platform->driver->suspend && !platform->suspended) {
1028                         platform->driver->suspend(cpu_dai);
1029                         platform->suspended = 1;
1030                 }
1031         }
1032
1033         /* close any waiting streams and save state */
1034         for (i = 0; i < card->num_rtd; i++) {
1035                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1036                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1037         }
1038
1039         for (i = 0; i < card->num_rtd; i++) {
1040                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1041
1042                 if (card->rtd[i].dai_link->ignore_suspend)
1043                         continue;
1044
1045                 if (driver->playback.stream_name != NULL)
1046                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1047                                 SND_SOC_DAPM_STREAM_SUSPEND);
1048
1049                 if (driver->capture.stream_name != NULL)
1050                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1051                                 SND_SOC_DAPM_STREAM_SUSPEND);
1052         }
1053
1054         /* suspend all CODECs */
1055         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1056                 /* If there are paths active then the CODEC will be held with
1057                  * bias _ON and should not be suspended. */
1058                 if (!codec->suspended && codec->driver->suspend) {
1059                         switch (codec->dapm.bias_level) {
1060                         case SND_SOC_BIAS_STANDBY:
1061                         case SND_SOC_BIAS_OFF:
1062                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1063                                 codec->suspended = 1;
1064                                 break;
1065                         default:
1066                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1067                                 break;
1068                         }
1069                 }
1070         }
1071
1072         for (i = 0; i < card->num_rtd; i++) {
1073                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1074
1075                 if (card->rtd[i].dai_link->ignore_suspend)
1076                         continue;
1077
1078                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1079                         cpu_dai->driver->suspend(cpu_dai);
1080         }
1081
1082         if (card->suspend_post)
1083                 card->suspend_post(pdev, PMSG_SUSPEND);
1084
1085         return 0;
1086 }
1087
1088 /* deferred resume work, so resume can complete before we finished
1089  * setting our codec back up, which can be very slow on I2C
1090  */
1091 static void soc_resume_deferred(struct work_struct *work)
1092 {
1093         struct snd_soc_card *card =
1094                         container_of(work, struct snd_soc_card, deferred_resume_work);
1095         struct platform_device *pdev = to_platform_device(card->dev);
1096         struct snd_soc_codec *codec;
1097         int i;
1098
1099         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1100          * so userspace apps are blocked from touching us
1101          */
1102
1103         dev_dbg(card->dev, "starting resume work\n");
1104
1105         /* Bring us up into D2 so that DAPM starts enabling things */
1106         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1107
1108         if (card->resume_pre)
1109                 card->resume_pre(pdev);
1110
1111         /* resume AC97 DAIs */
1112         for (i = 0; i < card->num_rtd; i++) {
1113                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1114
1115                 if (card->rtd[i].dai_link->ignore_suspend)
1116                         continue;
1117
1118                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1119                         cpu_dai->driver->resume(cpu_dai);
1120         }
1121
1122         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1123                 /* If the CODEC was idle over suspend then it will have been
1124                  * left with bias OFF or STANDBY and suspended so we must now
1125                  * resume.  Otherwise the suspend was suppressed.
1126                  */
1127                 if (codec->driver->resume && codec->suspended) {
1128                         switch (codec->dapm.bias_level) {
1129                         case SND_SOC_BIAS_STANDBY:
1130                         case SND_SOC_BIAS_OFF:
1131                                 codec->driver->resume(codec);
1132                                 codec->suspended = 0;
1133                                 break;
1134                         default:
1135                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1136                                 break;
1137                         }
1138                 }
1139         }
1140
1141         for (i = 0; i < card->num_rtd; i++) {
1142                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1143
1144                 if (card->rtd[i].dai_link->ignore_suspend)
1145                         continue;
1146
1147                 if (driver->playback.stream_name != NULL)
1148                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1149                                 SND_SOC_DAPM_STREAM_RESUME);
1150
1151                 if (driver->capture.stream_name != NULL)
1152                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1153                                 SND_SOC_DAPM_STREAM_RESUME);
1154         }
1155
1156         /* unmute any active DACs */
1157         for (i = 0; i < card->num_rtd; i++) {
1158                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1159                 struct snd_soc_dai_driver *drv = dai->driver;
1160
1161                 if (card->rtd[i].dai_link->ignore_suspend)
1162                         continue;
1163
1164                 if (drv->ops->digital_mute && dai->playback_active)
1165                         drv->ops->digital_mute(dai, 0);
1166         }
1167
1168         for (i = 0; i < card->num_rtd; i++) {
1169                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1170                 struct snd_soc_platform *platform = card->rtd[i].platform;
1171
1172                 if (card->rtd[i].dai_link->ignore_suspend)
1173                         continue;
1174
1175                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1176                         cpu_dai->driver->resume(cpu_dai);
1177                 if (platform->driver->resume && platform->suspended) {
1178                         platform->driver->resume(cpu_dai);
1179                         platform->suspended = 0;
1180                 }
1181         }
1182
1183         if (card->resume_post)
1184                 card->resume_post(pdev);
1185
1186         dev_dbg(card->dev, "resume work completed\n");
1187
1188         /* userspace can access us now we are back as we were before */
1189         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1190 }
1191
1192 /* powers up audio subsystem after a suspend */
1193 static int soc_resume(struct device *dev)
1194 {
1195         struct platform_device *pdev = to_platform_device(dev);
1196         struct snd_soc_card *card = platform_get_drvdata(pdev);
1197         int i;
1198
1199         /* AC97 devices might have other drivers hanging off them so
1200          * need to resume immediately.  Other drivers don't have that
1201          * problem and may take a substantial amount of time to resume
1202          * due to I/O costs and anti-pop so handle them out of line.
1203          */
1204         for (i = 0; i < card->num_rtd; i++) {
1205                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1206                 if (cpu_dai->driver->ac97_control) {
1207                         dev_dbg(dev, "Resuming AC97 immediately\n");
1208                         soc_resume_deferred(&card->deferred_resume_work);
1209                 } else {
1210                         dev_dbg(dev, "Scheduling resume work\n");
1211                         if (!schedule_work(&card->deferred_resume_work))
1212                                 dev_err(dev, "resume work item may be lost\n");
1213                 }
1214         }
1215
1216         return 0;
1217 }
1218 #else
1219 #define soc_suspend     NULL
1220 #define soc_resume      NULL
1221 #endif
1222
1223 static struct snd_soc_dai_ops null_dai_ops = {
1224 };
1225
1226 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1227 {
1228         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1229         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1230         struct snd_soc_codec *codec;
1231         struct snd_soc_platform *platform;
1232         struct snd_soc_dai *codec_dai, *cpu_dai;
1233
1234         if (rtd->complete)
1235                 return 1;
1236         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1237
1238         /* do we already have the CPU DAI for this link ? */
1239         if (rtd->cpu_dai) {
1240                 goto find_codec;
1241         }
1242         /* no, then find CPU DAI from registered DAIs*/
1243         list_for_each_entry(cpu_dai, &dai_list, list) {
1244                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1245
1246                         if (!try_module_get(cpu_dai->dev->driver->owner))
1247                                 return -ENODEV;
1248
1249                         rtd->cpu_dai = cpu_dai;
1250                         goto find_codec;
1251                 }
1252         }
1253         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1254                         dai_link->cpu_dai_name);
1255
1256 find_codec:
1257         /* do we already have the CODEC for this link ? */
1258         if (rtd->codec) {
1259                 goto find_platform;
1260         }
1261
1262         /* no, then find CODEC from registered CODECs*/
1263         list_for_each_entry(codec, &codec_list, list) {
1264                 if (!strcmp(codec->name, dai_link->codec_name)) {
1265                         rtd->codec = codec;
1266
1267                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1268                         list_for_each_entry(codec_dai, &dai_list, list) {
1269                                 if (codec->dev == codec_dai->dev &&
1270                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1271                                         rtd->codec_dai = codec_dai;
1272                                         goto find_platform;
1273                                 }
1274                         }
1275                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1276                                         dai_link->codec_dai_name);
1277
1278                         goto find_platform;
1279                 }
1280         }
1281         dev_dbg(card->dev, "CODEC %s not registered\n",
1282                         dai_link->codec_name);
1283
1284 find_platform:
1285         /* do we already have the CODEC DAI for this link ? */
1286         if (rtd->platform) {
1287                 goto out;
1288         }
1289         /* no, then find CPU DAI from registered DAIs*/
1290         list_for_each_entry(platform, &platform_list, list) {
1291                 if (!strcmp(platform->name, dai_link->platform_name)) {
1292                         rtd->platform = platform;
1293                         goto out;
1294                 }
1295         }
1296
1297         dev_dbg(card->dev, "platform %s not registered\n",
1298                         dai_link->platform_name);
1299         return 0;
1300
1301 out:
1302         /* mark rtd as complete if we found all 4 of our client devices */
1303         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1304                 rtd->complete = 1;
1305                 card->num_rtd++;
1306         }
1307         return 1;
1308 }
1309
1310 static void soc_remove_codec(struct snd_soc_codec *codec)
1311 {
1312         int err;
1313
1314         if (codec->driver->remove) {
1315                 err = codec->driver->remove(codec);
1316                 if (err < 0)
1317                         dev_err(codec->dev,
1318                                 "asoc: failed to remove %s: %d\n",
1319                                 codec->name, err);
1320         }
1321
1322         /* Make sure all DAPM widgets are freed */
1323         snd_soc_dapm_free(&codec->dapm);
1324
1325         soc_cleanup_codec_debugfs(codec);
1326         codec->probed = 0;
1327         list_del(&codec->card_list);
1328         module_put(codec->dev->driver->owner);
1329 }
1330
1331 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1332 {
1333         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1334         struct snd_soc_codec *codec = rtd->codec;
1335         struct snd_soc_platform *platform = rtd->platform;
1336         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1337         int err;
1338
1339         /* unregister the rtd device */
1340         if (rtd->dev_registered) {
1341                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1342                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1343                 device_unregister(&rtd->dev);
1344                 rtd->dev_registered = 0;
1345         }
1346
1347         /* remove the CODEC DAI */
1348         if (codec_dai && codec_dai->probed) {
1349                 if (codec_dai->driver->remove) {
1350                         err = codec_dai->driver->remove(codec_dai);
1351                         if (err < 0)
1352                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1353                 }
1354                 codec_dai->probed = 0;
1355                 list_del(&codec_dai->card_list);
1356         }
1357
1358         /* remove the platform */
1359         if (platform && platform->probed) {
1360                 if (platform->driver->remove) {
1361                         err = platform->driver->remove(platform);
1362                         if (err < 0)
1363                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1364                 }
1365                 platform->probed = 0;
1366                 list_del(&platform->card_list);
1367                 module_put(platform->dev->driver->owner);
1368         }
1369
1370         /* remove the CODEC */
1371         if (codec && codec->probed)
1372                 soc_remove_codec(codec);
1373
1374         /* remove the cpu_dai */
1375         if (cpu_dai && cpu_dai->probed) {
1376                 if (cpu_dai->driver->remove) {
1377                         err = cpu_dai->driver->remove(cpu_dai);
1378                         if (err < 0)
1379                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1380                 }
1381                 cpu_dai->probed = 0;
1382                 list_del(&cpu_dai->card_list);
1383                 module_put(cpu_dai->dev->driver->owner);
1384         }
1385 }
1386
1387 static void soc_set_name_prefix(struct snd_soc_card *card,
1388                                 struct snd_soc_codec *codec)
1389 {
1390         int i;
1391
1392         if (card->codec_conf == NULL)
1393                 return;
1394
1395         for (i = 0; i < card->num_configs; i++) {
1396                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1397                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1398                         codec->name_prefix = map->name_prefix;
1399                         break;
1400                 }
1401         }
1402 }
1403
1404 static int soc_probe_codec(struct snd_soc_card *card,
1405                            struct snd_soc_codec *codec)
1406 {
1407         int ret = 0;
1408
1409         codec->card = card;
1410         codec->dapm.card = card;
1411         soc_set_name_prefix(card, codec);
1412
1413         if (codec->driver->probe) {
1414                 ret = codec->driver->probe(codec);
1415                 if (ret < 0) {
1416                         dev_err(codec->dev,
1417                                 "asoc: failed to probe CODEC %s: %d\n",
1418                                 codec->name, ret);
1419                         return ret;
1420                 }
1421         }
1422
1423         soc_init_codec_debugfs(codec);
1424
1425         /* mark codec as probed and add to card codec list */
1426         if (!try_module_get(codec->dev->driver->owner))
1427                 return -ENODEV;
1428
1429         codec->probed = 1;
1430         list_add(&codec->card_list, &card->codec_dev_list);
1431         list_add(&codec->dapm.list, &card->dapm_list);
1432
1433         return ret;
1434 }
1435
1436 static void rtd_release(struct device *dev) {}
1437
1438 static int soc_post_component_init(struct snd_soc_card *card,
1439                                    struct snd_soc_codec *codec,
1440                                    int num, int dailess)
1441 {
1442         struct snd_soc_dai_link *dai_link = NULL;
1443         struct snd_soc_aux_dev *aux_dev = NULL;
1444         struct snd_soc_pcm_runtime *rtd;
1445         const char *temp, *name;
1446         int ret = 0;
1447
1448         if (!dailess) {
1449                 dai_link = &card->dai_link[num];
1450                 rtd = &card->rtd[num];
1451                 name = dai_link->name;
1452         } else {
1453                 aux_dev = &card->aux_dev[num];
1454                 rtd = &card->rtd_aux[num];
1455                 name = aux_dev->name;
1456         }
1457
1458         /* machine controls, routes and widgets are not prefixed */
1459         temp = codec->name_prefix;
1460         codec->name_prefix = NULL;
1461
1462         /* do machine specific initialization */
1463         if (!dailess && dai_link->init)
1464                 ret = dai_link->init(rtd);
1465         else if (dailess && aux_dev->init)
1466                 ret = aux_dev->init(&codec->dapm);
1467         if (ret < 0) {
1468                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1469                 return ret;
1470         }
1471         codec->name_prefix = temp;
1472
1473         /* Make sure all DAPM widgets are instantiated */
1474         snd_soc_dapm_new_widgets(&codec->dapm);
1475         snd_soc_dapm_sync(&codec->dapm);
1476
1477         /* register the rtd device */
1478         rtd->codec = codec;
1479         rtd->card = card;
1480         rtd->dev.parent = card->dev;
1481         rtd->dev.release = rtd_release;
1482         rtd->dev.init_name = name;
1483         ret = device_register(&rtd->dev);
1484         if (ret < 0) {
1485                 dev_err(card->dev,
1486                         "asoc: failed to register runtime device: %d\n", ret);
1487                 return ret;
1488         }
1489         rtd->dev_registered = 1;
1490
1491         /* add DAPM sysfs entries for this codec */
1492         ret = snd_soc_dapm_sys_add(&rtd->dev);
1493         if (ret < 0)
1494                 dev_err(codec->dev,
1495                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1496                         ret);
1497
1498         /* add codec sysfs entries */
1499         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1500         if (ret < 0)
1501                 dev_err(codec->dev,
1502                         "asoc: failed to add codec sysfs files: %d\n", ret);
1503
1504         return 0;
1505 }
1506
1507 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1508 {
1509         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1510         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1511         struct snd_soc_codec *codec = rtd->codec;
1512         struct snd_soc_platform *platform = rtd->platform;
1513         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1514         int ret;
1515
1516         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1517
1518         /* config components */
1519         codec_dai->codec = codec;
1520         cpu_dai->platform = platform;
1521         codec_dai->card = card;
1522         cpu_dai->card = card;
1523
1524         /* set default power off timeout */
1525         rtd->pmdown_time = pmdown_time;
1526
1527         /* probe the cpu_dai */
1528         if (!cpu_dai->probed) {
1529                 if (cpu_dai->driver->probe) {
1530                         ret = cpu_dai->driver->probe(cpu_dai);
1531                         if (ret < 0) {
1532                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1533                                                 cpu_dai->name);
1534                                 return ret;
1535                         }
1536                 }
1537                 cpu_dai->probed = 1;
1538                 /* mark cpu_dai as probed and add to card cpu_dai list */
1539                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1540         }
1541
1542         /* probe the CODEC */
1543         if (!codec->probed) {
1544                 ret = soc_probe_codec(card, codec);
1545                 if (ret < 0)
1546                         return ret;
1547         }
1548
1549         /* probe the platform */
1550         if (!platform->probed) {
1551                 if (platform->driver->probe) {
1552                         ret = platform->driver->probe(platform);
1553                         if (ret < 0) {
1554                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1555                                                 platform->name);
1556                                 return ret;
1557                         }
1558                 }
1559                 /* mark platform as probed and add to card platform list */
1560
1561                 if (!try_module_get(platform->dev->driver->owner))
1562                         return -ENODEV;
1563
1564                 platform->probed = 1;
1565                 list_add(&platform->card_list, &card->platform_dev_list);
1566         }
1567
1568         /* probe the CODEC DAI */
1569         if (!codec_dai->probed) {
1570                 if (codec_dai->driver->probe) {
1571                         ret = codec_dai->driver->probe(codec_dai);
1572                         if (ret < 0) {
1573                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1574                                                 codec_dai->name);
1575                                 return ret;
1576                         }
1577                 }
1578
1579                 /* mark cpu_dai as probed and add to card cpu_dai list */
1580                 codec_dai->probed = 1;
1581                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1582         }
1583
1584         /* DAPM dai link stream work */
1585         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1586
1587         ret = soc_post_component_init(card, codec, num, 0);
1588         if (ret)
1589                 return ret;
1590
1591         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1592         if (ret < 0)
1593                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1594
1595         /* create the pcm */
1596         ret = soc_new_pcm(rtd, num);
1597         if (ret < 0) {
1598                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1599                 return ret;
1600         }
1601
1602         /* add platform data for AC97 devices */
1603         if (rtd->codec_dai->driver->ac97_control)
1604                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1605
1606         return 0;
1607 }
1608
1609 #ifdef CONFIG_SND_SOC_AC97_BUS
1610 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1611 {
1612         int ret;
1613
1614         /* Only instantiate AC97 if not already done by the adaptor
1615          * for the generic AC97 subsystem.
1616          */
1617         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1618                 /*
1619                  * It is possible that the AC97 device is already registered to
1620                  * the device subsystem. This happens when the device is created
1621                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1622                  * is the generic AC97 glue but others migh emerge.
1623                  *
1624                  * In those cases we don't try to register the device again.
1625                  */
1626                 if (!rtd->codec->ac97_created)
1627                         return 0;
1628
1629                 ret = soc_ac97_dev_register(rtd->codec);
1630                 if (ret < 0) {
1631                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1632                         return ret;
1633                 }
1634
1635                 rtd->codec->ac97_registered = 1;
1636         }
1637         return 0;
1638 }
1639
1640 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1641 {
1642         if (codec->ac97_registered) {
1643                 soc_ac97_dev_unregister(codec);
1644                 codec->ac97_registered = 0;
1645         }
1646 }
1647 #endif
1648
1649 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1650 {
1651         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1652         struct snd_soc_codec *codec;
1653         int ret = -ENODEV;
1654
1655         /* find CODEC from registered CODECs*/
1656         list_for_each_entry(codec, &codec_list, list) {
1657                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1658                         if (codec->probed) {
1659                                 dev_err(codec->dev,
1660                                         "asoc: codec already probed");
1661                                 ret = -EBUSY;
1662                                 goto out;
1663                         }
1664                         goto found;
1665                 }
1666         }
1667         /* codec not found */
1668         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1669         goto out;
1670
1671 found:
1672         if (!try_module_get(codec->dev->driver->owner))
1673                 return -ENODEV;
1674
1675         ret = soc_probe_codec(card, codec);
1676         if (ret < 0)
1677                 return ret;
1678
1679         ret = soc_post_component_init(card, codec, num, 1);
1680
1681 out:
1682         return ret;
1683 }
1684
1685 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1686 {
1687         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1688         struct snd_soc_codec *codec = rtd->codec;
1689
1690         /* unregister the rtd device */
1691         if (rtd->dev_registered) {
1692                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1693                 device_unregister(&rtd->dev);
1694                 rtd->dev_registered = 0;
1695         }
1696
1697         if (codec && codec->probed)
1698                 soc_remove_codec(codec);
1699 }
1700
1701 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1702                                     enum snd_soc_compress_type compress_type)
1703 {
1704         int ret;
1705
1706         if (codec->cache_init)
1707                 return 0;
1708
1709         /* override the compress_type if necessary */
1710         if (compress_type && codec->compress_type != compress_type)
1711                 codec->compress_type = compress_type;
1712         ret = snd_soc_cache_init(codec);
1713         if (ret < 0) {
1714                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1715                         ret);
1716                 return ret;
1717         }
1718         codec->cache_init = 1;
1719         return 0;
1720 }
1721
1722 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1723 {
1724         struct platform_device *pdev = to_platform_device(card->dev);
1725         struct snd_soc_codec *codec;
1726         struct snd_soc_codec_conf *codec_conf;
1727         enum snd_soc_compress_type compress_type;
1728         int ret, i;
1729
1730         mutex_lock(&card->mutex);
1731
1732         if (card->instantiated) {
1733                 mutex_unlock(&card->mutex);
1734                 return;
1735         }
1736
1737         /* bind DAIs */
1738         for (i = 0; i < card->num_links; i++)
1739                 soc_bind_dai_link(card, i);
1740
1741         /* bind completed ? */
1742         if (card->num_rtd != card->num_links) {
1743                 mutex_unlock(&card->mutex);
1744                 return;
1745         }
1746
1747         /* initialize the register cache for each available codec */
1748         list_for_each_entry(codec, &codec_list, list) {
1749                 if (codec->cache_init)
1750                         continue;
1751                 /* by default we don't override the compress_type */
1752                 compress_type = 0;
1753                 /* check to see if we need to override the compress_type */
1754                 for (i = 0; i < card->num_configs; ++i) {
1755                         codec_conf = &card->codec_conf[i];
1756                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1757                                 compress_type = codec_conf->compress_type;
1758                                 if (compress_type && compress_type
1759                                     != codec->compress_type)
1760                                         break;
1761                         }
1762                 }
1763                 ret = snd_soc_init_codec_cache(codec, compress_type);
1764                 if (ret < 0) {
1765                         mutex_unlock(&card->mutex);
1766                         return;
1767                 }
1768         }
1769
1770         /* card bind complete so register a sound card */
1771         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1772                         card->owner, 0, &card->snd_card);
1773         if (ret < 0) {
1774                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1775                         card->name);
1776                 mutex_unlock(&card->mutex);
1777                 return;
1778         }
1779         card->snd_card->dev = card->dev;
1780
1781 #ifdef CONFIG_PM
1782         /* deferred resume work */
1783         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1784 #endif
1785
1786         /* initialise the sound card only once */
1787         if (card->probe) {
1788                 ret = card->probe(pdev);
1789                 if (ret < 0)
1790                         goto card_probe_error;
1791         }
1792
1793         for (i = 0; i < card->num_links; i++) {
1794                 ret = soc_probe_dai_link(card, i);
1795                 if (ret < 0) {
1796                         pr_err("asoc: failed to instantiate card %s: %d\n",
1797                                card->name, ret);
1798                         goto probe_dai_err;
1799                 }
1800         }
1801
1802         for (i = 0; i < card->num_aux_devs; i++) {
1803                 ret = soc_probe_aux_dev(card, i);
1804                 if (ret < 0) {
1805                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1806                                card->name, ret);
1807                         goto probe_aux_dev_err;
1808                 }
1809         }
1810
1811         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1812                  "%s",  card->name);
1813         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1814                  "%s", card->name);
1815
1816         ret = snd_card_register(card->snd_card);
1817         if (ret < 0) {
1818                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1819                 goto probe_aux_dev_err;
1820         }
1821
1822 #ifdef CONFIG_SND_SOC_AC97_BUS
1823         /* register any AC97 codecs */
1824         for (i = 0; i < card->num_rtd; i++) {
1825                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1826                 if (ret < 0) {
1827                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1828                         while (--i >= 0)
1829                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1830                         goto probe_aux_dev_err;
1831                 }
1832         }
1833 #endif
1834
1835         card->instantiated = 1;
1836         mutex_unlock(&card->mutex);
1837         return;
1838
1839 probe_aux_dev_err:
1840         for (i = 0; i < card->num_aux_devs; i++)
1841                 soc_remove_aux_dev(card, i);
1842
1843 probe_dai_err:
1844         for (i = 0; i < card->num_links; i++)
1845                 soc_remove_dai_link(card, i);
1846
1847 card_probe_error:
1848         if (card->remove)
1849                 card->remove(pdev);
1850
1851         snd_card_free(card->snd_card);
1852
1853         mutex_unlock(&card->mutex);
1854 }
1855
1856 /*
1857  * Attempt to initialise any uninitialised cards.  Must be called with
1858  * client_mutex.
1859  */
1860 static void snd_soc_instantiate_cards(void)
1861 {
1862         struct snd_soc_card *card;
1863         list_for_each_entry(card, &card_list, list)
1864                 snd_soc_instantiate_card(card);
1865 }
1866
1867 /* probes a new socdev */
1868 static int soc_probe(struct platform_device *pdev)
1869 {
1870         struct snd_soc_card *card = platform_get_drvdata(pdev);
1871         int ret = 0;
1872
1873         /* Bodge while we unpick instantiation */
1874         card->dev = &pdev->dev;
1875         INIT_LIST_HEAD(&card->dai_dev_list);
1876         INIT_LIST_HEAD(&card->codec_dev_list);
1877         INIT_LIST_HEAD(&card->platform_dev_list);
1878         INIT_LIST_HEAD(&card->widgets);
1879         INIT_LIST_HEAD(&card->paths);
1880         INIT_LIST_HEAD(&card->dapm_list);
1881
1882         soc_init_card_debugfs(card);
1883
1884         ret = snd_soc_register_card(card);
1885         if (ret != 0) {
1886                 dev_err(&pdev->dev, "Failed to register card\n");
1887                 return ret;
1888         }
1889
1890         return 0;
1891 }
1892
1893 /* removes a socdev */
1894 static int soc_remove(struct platform_device *pdev)
1895 {
1896         struct snd_soc_card *card = platform_get_drvdata(pdev);
1897         int i;
1898
1899         if (card->instantiated) {
1900
1901                 /* make sure any delayed work runs */
1902                 for (i = 0; i < card->num_rtd; i++) {
1903                         struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1904                         flush_delayed_work_sync(&rtd->delayed_work);
1905                 }
1906
1907                 /* remove auxiliary devices */
1908                 for (i = 0; i < card->num_aux_devs; i++)
1909                         soc_remove_aux_dev(card, i);
1910
1911                 /* remove and free each DAI */
1912                 for (i = 0; i < card->num_rtd; i++)
1913                         soc_remove_dai_link(card, i);
1914
1915                 soc_cleanup_card_debugfs(card);
1916
1917                 /* remove the card */
1918                 if (card->remove)
1919                         card->remove(pdev);
1920
1921                 kfree(card->rtd);
1922                 snd_card_free(card->snd_card);
1923         }
1924         snd_soc_unregister_card(card);
1925         return 0;
1926 }
1927
1928 static int soc_poweroff(struct device *dev)
1929 {
1930         struct platform_device *pdev = to_platform_device(dev);
1931         struct snd_soc_card *card = platform_get_drvdata(pdev);
1932         int i;
1933
1934         if (!card->instantiated)
1935                 return 0;
1936
1937         /* Flush out pmdown_time work - we actually do want to run it
1938          * now, we're shutting down so no imminent restart. */
1939         for (i = 0; i < card->num_rtd; i++) {
1940                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1941                 flush_delayed_work_sync(&rtd->delayed_work);
1942         }
1943
1944         snd_soc_dapm_shutdown(card);
1945
1946         return 0;
1947 }
1948
1949 static const struct dev_pm_ops soc_pm_ops = {
1950         .suspend = soc_suspend,
1951         .resume = soc_resume,
1952         .poweroff = soc_poweroff,
1953 };
1954
1955 /* ASoC platform driver */
1956 static struct platform_driver soc_driver = {
1957         .driver         = {
1958                 .name           = "soc-audio",
1959                 .owner          = THIS_MODULE,
1960                 .pm             = &soc_pm_ops,
1961         },
1962         .probe          = soc_probe,
1963         .remove         = soc_remove,
1964 };
1965
1966 /* create a new pcm */
1967 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1968 {
1969         struct snd_soc_codec *codec = rtd->codec;
1970         struct snd_soc_platform *platform = rtd->platform;
1971         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1972         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1973         struct snd_pcm *pcm;
1974         char new_name[64];
1975         int ret = 0, playback = 0, capture = 0;
1976
1977         /* check client and interface hw capabilities */
1978         snprintf(new_name, sizeof(new_name), "%s %s-%d",
1979                         rtd->dai_link->stream_name, codec_dai->name, num);
1980
1981         if (codec_dai->driver->playback.channels_min)
1982                 playback = 1;
1983         if (codec_dai->driver->capture.channels_min)
1984                 capture = 1;
1985
1986         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
1987         ret = snd_pcm_new(rtd->card->snd_card, new_name,
1988                         num, playback, capture, &pcm);
1989         if (ret < 0) {
1990                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
1991                 return ret;
1992         }
1993
1994         rtd->pcm = pcm;
1995         pcm->private_data = rtd;
1996         soc_pcm_ops.mmap = platform->driver->ops->mmap;
1997         soc_pcm_ops.pointer = platform->driver->ops->pointer;
1998         soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
1999         soc_pcm_ops.copy = platform->driver->ops->copy;
2000         soc_pcm_ops.silence = platform->driver->ops->silence;
2001         soc_pcm_ops.ack = platform->driver->ops->ack;
2002         soc_pcm_ops.page = platform->driver->ops->page;
2003
2004         if (playback)
2005                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2006
2007         if (capture)
2008                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2009
2010         ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2011         if (ret < 0) {
2012                 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2013                 return ret;
2014         }
2015
2016         pcm->private_free = platform->driver->pcm_free;
2017         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2018                 cpu_dai->name);
2019         return ret;
2020 }
2021
2022 /**
2023  * snd_soc_codec_volatile_register: Report if a register is volatile.
2024  *
2025  * @codec: CODEC to query.
2026  * @reg: Register to query.
2027  *
2028  * Boolean function indiciating if a CODEC register is volatile.
2029  */
2030 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
2031 {
2032         if (codec->driver->volatile_register)
2033                 return codec->driver->volatile_register(codec, reg);
2034         else
2035                 return 0;
2036 }
2037 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2038
2039 /**
2040  * snd_soc_new_ac97_codec - initailise AC97 device
2041  * @codec: audio codec
2042  * @ops: AC97 bus operations
2043  * @num: AC97 codec number
2044  *
2045  * Initialises AC97 codec resources for use by ad-hoc devices only.
2046  */
2047 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2048         struct snd_ac97_bus_ops *ops, int num)
2049 {
2050         mutex_lock(&codec->mutex);
2051
2052         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2053         if (codec->ac97 == NULL) {
2054                 mutex_unlock(&codec->mutex);
2055                 return -ENOMEM;
2056         }
2057
2058         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2059         if (codec->ac97->bus == NULL) {
2060                 kfree(codec->ac97);
2061                 codec->ac97 = NULL;
2062                 mutex_unlock(&codec->mutex);
2063                 return -ENOMEM;
2064         }
2065
2066         codec->ac97->bus->ops = ops;
2067         codec->ac97->num = num;
2068
2069         /*
2070          * Mark the AC97 device to be created by us. This way we ensure that the
2071          * device will be registered with the device subsystem later on.
2072          */
2073         codec->ac97_created = 1;
2074
2075         mutex_unlock(&codec->mutex);
2076         return 0;
2077 }
2078 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2079
2080 /**
2081  * snd_soc_free_ac97_codec - free AC97 codec device
2082  * @codec: audio codec
2083  *
2084  * Frees AC97 codec device resources.
2085  */
2086 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2087 {
2088         mutex_lock(&codec->mutex);
2089 #ifdef CONFIG_SND_SOC_AC97_BUS
2090         soc_unregister_ac97_dai_link(codec);
2091 #endif
2092         kfree(codec->ac97->bus);
2093         kfree(codec->ac97);
2094         codec->ac97 = NULL;
2095         codec->ac97_created = 0;
2096         mutex_unlock(&codec->mutex);
2097 }
2098 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2099
2100 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2101 {
2102         unsigned int ret;
2103
2104         ret = codec->read(codec, reg);
2105         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2106         trace_snd_soc_reg_read(codec, reg, ret);
2107
2108         return ret;
2109 }
2110 EXPORT_SYMBOL_GPL(snd_soc_read);
2111
2112 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2113                            unsigned int reg, unsigned int val)
2114 {
2115         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2116         trace_snd_soc_reg_write(codec, reg, val);
2117         return codec->write(codec, reg, val);
2118 }
2119 EXPORT_SYMBOL_GPL(snd_soc_write);
2120
2121 /**
2122  * snd_soc_update_bits - update codec register bits
2123  * @codec: audio codec
2124  * @reg: codec register
2125  * @mask: register mask
2126  * @value: new value
2127  *
2128  * Writes new register value.
2129  *
2130  * Returns 1 for change, 0 for no change, or negative error code.
2131  */
2132 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2133                                 unsigned int mask, unsigned int value)
2134 {
2135         int change;
2136         unsigned int old, new;
2137         int ret;
2138
2139         ret = snd_soc_read(codec, reg);
2140         if (ret < 0)
2141                 return ret;
2142
2143         old = ret;
2144         new = (old & ~mask) | value;
2145         change = old != new;
2146         if (change) {
2147                 ret = snd_soc_write(codec, reg, new);
2148                 if (ret < 0)
2149                         return ret;
2150         }
2151
2152         return change;
2153 }
2154 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2155
2156 /**
2157  * snd_soc_update_bits_locked - update codec register bits
2158  * @codec: audio codec
2159  * @reg: codec register
2160  * @mask: register mask
2161  * @value: new value
2162  *
2163  * Writes new register value, and takes the codec mutex.
2164  *
2165  * Returns 1 for change else 0.
2166  */
2167 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2168                                unsigned short reg, unsigned int mask,
2169                                unsigned int value)
2170 {
2171         int change;
2172
2173         mutex_lock(&codec->mutex);
2174         change = snd_soc_update_bits(codec, reg, mask, value);
2175         mutex_unlock(&codec->mutex);
2176
2177         return change;
2178 }
2179 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2180
2181 /**
2182  * snd_soc_test_bits - test register for change
2183  * @codec: audio codec
2184  * @reg: codec register
2185  * @mask: register mask
2186  * @value: new value
2187  *
2188  * Tests a register with a new value and checks if the new value is
2189  * different from the old value.
2190  *
2191  * Returns 1 for change else 0.
2192  */
2193 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2194                                 unsigned int mask, unsigned int value)
2195 {
2196         int change;
2197         unsigned int old, new;
2198
2199         old = snd_soc_read(codec, reg);
2200         new = (old & ~mask) | value;
2201         change = old != new;
2202
2203         return change;
2204 }
2205 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2206
2207 /**
2208  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2209  * @substream: the pcm substream
2210  * @hw: the hardware parameters
2211  *
2212  * Sets the substream runtime hardware parameters.
2213  */
2214 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2215         const struct snd_pcm_hardware *hw)
2216 {
2217         struct snd_pcm_runtime *runtime = substream->runtime;
2218         runtime->hw.info = hw->info;
2219         runtime->hw.formats = hw->formats;
2220         runtime->hw.period_bytes_min = hw->period_bytes_min;
2221         runtime->hw.period_bytes_max = hw->period_bytes_max;
2222         runtime->hw.periods_min = hw->periods_min;
2223         runtime->hw.periods_max = hw->periods_max;
2224         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2225         runtime->hw.fifo_size = hw->fifo_size;
2226         return 0;
2227 }
2228 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2229
2230 /**
2231  * snd_soc_cnew - create new control
2232  * @_template: control template
2233  * @data: control private data
2234  * @long_name: control long name
2235  *
2236  * Create a new mixer control from a template control.
2237  *
2238  * Returns 0 for success, else error.
2239  */
2240 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2241         void *data, char *long_name)
2242 {
2243         struct snd_kcontrol_new template;
2244
2245         memcpy(&template, _template, sizeof(template));
2246         if (long_name)
2247                 template.name = long_name;
2248         template.index = 0;
2249
2250         return snd_ctl_new1(&template, data);
2251 }
2252 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2253
2254 /**
2255  * snd_soc_add_controls - add an array of controls to a codec.
2256  * Convienience function to add a list of controls. Many codecs were
2257  * duplicating this code.
2258  *
2259  * @codec: codec to add controls to
2260  * @controls: array of controls to add
2261  * @num_controls: number of elements in the array
2262  *
2263  * Return 0 for success, else error.
2264  */
2265 int snd_soc_add_controls(struct snd_soc_codec *codec,
2266         const struct snd_kcontrol_new *controls, int num_controls)
2267 {
2268         struct snd_card *card = codec->card->snd_card;
2269         char prefixed_name[44], *name;
2270         int err, i;
2271
2272         for (i = 0; i < num_controls; i++) {
2273                 const struct snd_kcontrol_new *control = &controls[i];
2274                 if (codec->name_prefix) {
2275                         snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
2276                                  codec->name_prefix, control->name);
2277                         name = prefixed_name;
2278                 } else {
2279                         name = control->name;
2280                 }
2281                 err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
2282                 if (err < 0) {
2283                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2284                                 codec->name, name, err);
2285                         return err;
2286                 }
2287         }
2288
2289         return 0;
2290 }
2291 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2292
2293 /**
2294  * snd_soc_info_enum_double - enumerated double mixer info callback
2295  * @kcontrol: mixer control
2296  * @uinfo: control element information
2297  *
2298  * Callback to provide information about a double enumerated
2299  * mixer control.
2300  *
2301  * Returns 0 for success.
2302  */
2303 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2304         struct snd_ctl_elem_info *uinfo)
2305 {
2306         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2307
2308         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2309         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2310         uinfo->value.enumerated.items = e->max;
2311
2312         if (uinfo->value.enumerated.item > e->max - 1)
2313                 uinfo->value.enumerated.item = e->max - 1;
2314         strcpy(uinfo->value.enumerated.name,
2315                 e->texts[uinfo->value.enumerated.item]);
2316         return 0;
2317 }
2318 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2319
2320 /**
2321  * snd_soc_get_enum_double - enumerated double mixer get callback
2322  * @kcontrol: mixer control
2323  * @ucontrol: control element information
2324  *
2325  * Callback to get the value of a double enumerated mixer.
2326  *
2327  * Returns 0 for success.
2328  */
2329 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2330         struct snd_ctl_elem_value *ucontrol)
2331 {
2332         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2333         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2334         unsigned int val, bitmask;
2335
2336         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2337                 ;
2338         val = snd_soc_read(codec, e->reg);
2339         ucontrol->value.enumerated.item[0]
2340                 = (val >> e->shift_l) & (bitmask - 1);
2341         if (e->shift_l != e->shift_r)
2342                 ucontrol->value.enumerated.item[1] =
2343                         (val >> e->shift_r) & (bitmask - 1);
2344
2345         return 0;
2346 }
2347 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2348
2349 /**
2350  * snd_soc_put_enum_double - enumerated double mixer put callback
2351  * @kcontrol: mixer control
2352  * @ucontrol: control element information
2353  *
2354  * Callback to set the value of a double enumerated mixer.
2355  *
2356  * Returns 0 for success.
2357  */
2358 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2359         struct snd_ctl_elem_value *ucontrol)
2360 {
2361         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2362         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2363         unsigned int val;
2364         unsigned int mask, bitmask;
2365
2366         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2367                 ;
2368         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2369                 return -EINVAL;
2370         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2371         mask = (bitmask - 1) << e->shift_l;
2372         if (e->shift_l != e->shift_r) {
2373                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2374                         return -EINVAL;
2375                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2376                 mask |= (bitmask - 1) << e->shift_r;
2377         }
2378
2379         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2380 }
2381 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2382
2383 /**
2384  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2385  * @kcontrol: mixer control
2386  * @ucontrol: control element information
2387  *
2388  * Callback to get the value of a double semi enumerated mixer.
2389  *
2390  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2391  * used for handling bitfield coded enumeration for example.
2392  *
2393  * Returns 0 for success.
2394  */
2395 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2396         struct snd_ctl_elem_value *ucontrol)
2397 {
2398         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2399         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2400         unsigned int reg_val, val, mux;
2401
2402         reg_val = snd_soc_read(codec, e->reg);
2403         val = (reg_val >> e->shift_l) & e->mask;
2404         for (mux = 0; mux < e->max; mux++) {
2405                 if (val == e->values[mux])
2406                         break;
2407         }
2408         ucontrol->value.enumerated.item[0] = mux;
2409         if (e->shift_l != e->shift_r) {
2410                 val = (reg_val >> e->shift_r) & e->mask;
2411                 for (mux = 0; mux < e->max; mux++) {
2412                         if (val == e->values[mux])
2413                                 break;
2414                 }
2415                 ucontrol->value.enumerated.item[1] = mux;
2416         }
2417
2418         return 0;
2419 }
2420 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2421
2422 /**
2423  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2424  * @kcontrol: mixer control
2425  * @ucontrol: control element information
2426  *
2427  * Callback to set the value of a double semi enumerated mixer.
2428  *
2429  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2430  * used for handling bitfield coded enumeration for example.
2431  *
2432  * Returns 0 for success.
2433  */
2434 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2435         struct snd_ctl_elem_value *ucontrol)
2436 {
2437         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2438         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2439         unsigned int val;
2440         unsigned int mask;
2441
2442         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2443                 return -EINVAL;
2444         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2445         mask = e->mask << e->shift_l;
2446         if (e->shift_l != e->shift_r) {
2447                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2448                         return -EINVAL;
2449                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2450                 mask |= e->mask << e->shift_r;
2451         }
2452
2453         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2454 }
2455 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2456
2457 /**
2458  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2459  * @kcontrol: mixer control
2460  * @uinfo: control element information
2461  *
2462  * Callback to provide information about an external enumerated
2463  * single mixer.
2464  *
2465  * Returns 0 for success.
2466  */
2467 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2468         struct snd_ctl_elem_info *uinfo)
2469 {
2470         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2471
2472         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2473         uinfo->count = 1;
2474         uinfo->value.enumerated.items = e->max;
2475
2476         if (uinfo->value.enumerated.item > e->max - 1)
2477                 uinfo->value.enumerated.item = e->max - 1;
2478         strcpy(uinfo->value.enumerated.name,
2479                 e->texts[uinfo->value.enumerated.item]);
2480         return 0;
2481 }
2482 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2483
2484 /**
2485  * snd_soc_info_volsw_ext - external single mixer info callback
2486  * @kcontrol: mixer control
2487  * @uinfo: control element information
2488  *
2489  * Callback to provide information about a single external mixer control.
2490  *
2491  * Returns 0 for success.
2492  */
2493 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2494         struct snd_ctl_elem_info *uinfo)
2495 {
2496         int max = kcontrol->private_value;
2497
2498         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2499                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2500         else
2501                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2502
2503         uinfo->count = 1;
2504         uinfo->value.integer.min = 0;
2505         uinfo->value.integer.max = max;
2506         return 0;
2507 }
2508 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2509
2510 /**
2511  * snd_soc_info_volsw - single mixer info callback
2512  * @kcontrol: mixer control
2513  * @uinfo: control element information
2514  *
2515  * Callback to provide information about a single mixer control.
2516  *
2517  * Returns 0 for success.
2518  */
2519 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2520         struct snd_ctl_elem_info *uinfo)
2521 {
2522         struct soc_mixer_control *mc =
2523                 (struct soc_mixer_control *)kcontrol->private_value;
2524         int platform_max;
2525         unsigned int shift = mc->shift;
2526         unsigned int rshift = mc->rshift;
2527
2528         if (!mc->platform_max)
2529                 mc->platform_max = mc->max;
2530         platform_max = mc->platform_max;
2531
2532         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2533                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2534         else
2535                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2536
2537         uinfo->count = shift == rshift ? 1 : 2;
2538         uinfo->value.integer.min = 0;
2539         uinfo->value.integer.max = platform_max;
2540         return 0;
2541 }
2542 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2543
2544 /**
2545  * snd_soc_get_volsw - single mixer get callback
2546  * @kcontrol: mixer control
2547  * @ucontrol: control element information
2548  *
2549  * Callback to get the value of a single mixer control.
2550  *
2551  * Returns 0 for success.
2552  */
2553 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2554         struct snd_ctl_elem_value *ucontrol)
2555 {
2556         struct soc_mixer_control *mc =
2557                 (struct soc_mixer_control *)kcontrol->private_value;
2558         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2559         unsigned int reg = mc->reg;
2560         unsigned int shift = mc->shift;
2561         unsigned int rshift = mc->rshift;
2562         int max = mc->max;
2563         unsigned int mask = (1 << fls(max)) - 1;
2564         unsigned int invert = mc->invert;
2565
2566         ucontrol->value.integer.value[0] =
2567                 (snd_soc_read(codec, reg) >> shift) & mask;
2568         if (shift != rshift)
2569                 ucontrol->value.integer.value[1] =
2570                         (snd_soc_read(codec, reg) >> rshift) & mask;
2571         if (invert) {
2572                 ucontrol->value.integer.value[0] =
2573                         max - ucontrol->value.integer.value[0];
2574                 if (shift != rshift)
2575                         ucontrol->value.integer.value[1] =
2576                                 max - ucontrol->value.integer.value[1];
2577         }
2578
2579         return 0;
2580 }
2581 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2582
2583 /**
2584  * snd_soc_put_volsw - single mixer put callback
2585  * @kcontrol: mixer control
2586  * @ucontrol: control element information
2587  *
2588  * Callback to set the value of a single mixer control.
2589  *
2590  * Returns 0 for success.
2591  */
2592 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2593         struct snd_ctl_elem_value *ucontrol)
2594 {
2595         struct soc_mixer_control *mc =
2596                 (struct soc_mixer_control *)kcontrol->private_value;
2597         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2598         unsigned int reg = mc->reg;
2599         unsigned int shift = mc->shift;
2600         unsigned int rshift = mc->rshift;
2601         int max = mc->max;
2602         unsigned int mask = (1 << fls(max)) - 1;
2603         unsigned int invert = mc->invert;
2604         unsigned int val, val2, val_mask;
2605
2606         val = (ucontrol->value.integer.value[0] & mask);
2607         if (invert)
2608                 val = max - val;
2609         val_mask = mask << shift;
2610         val = val << shift;
2611         if (shift != rshift) {
2612                 val2 = (ucontrol->value.integer.value[1] & mask);
2613                 if (invert)
2614                         val2 = max - val2;
2615                 val_mask |= mask << rshift;
2616                 val |= val2 << rshift;
2617         }
2618         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2619 }
2620 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2621
2622 /**
2623  * snd_soc_info_volsw_2r - double mixer info callback
2624  * @kcontrol: mixer control
2625  * @uinfo: control element information
2626  *
2627  * Callback to provide information about a double mixer control that
2628  * spans 2 codec registers.
2629  *
2630  * Returns 0 for success.
2631  */
2632 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2633         struct snd_ctl_elem_info *uinfo)
2634 {
2635         struct soc_mixer_control *mc =
2636                 (struct soc_mixer_control *)kcontrol->private_value;
2637         int platform_max;
2638
2639         if (!mc->platform_max)
2640                 mc->platform_max = mc->max;
2641         platform_max = mc->platform_max;
2642
2643         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2644                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2645         else
2646                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2647
2648         uinfo->count = 2;
2649         uinfo->value.integer.min = 0;
2650         uinfo->value.integer.max = platform_max;
2651         return 0;
2652 }
2653 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2654
2655 /**
2656  * snd_soc_get_volsw_2r - double mixer get callback
2657  * @kcontrol: mixer control
2658  * @ucontrol: control element information
2659  *
2660  * Callback to get the value of a double mixer control that spans 2 registers.
2661  *
2662  * Returns 0 for success.
2663  */
2664 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2665         struct snd_ctl_elem_value *ucontrol)
2666 {
2667         struct soc_mixer_control *mc =
2668                 (struct soc_mixer_control *)kcontrol->private_value;
2669         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2670         unsigned int reg = mc->reg;
2671         unsigned int reg2 = mc->rreg;
2672         unsigned int shift = mc->shift;
2673         int max = mc->max;
2674         unsigned int mask = (1 << fls(max)) - 1;
2675         unsigned int invert = mc->invert;
2676
2677         ucontrol->value.integer.value[0] =
2678                 (snd_soc_read(codec, reg) >> shift) & mask;
2679         ucontrol->value.integer.value[1] =
2680                 (snd_soc_read(codec, reg2) >> shift) & mask;
2681         if (invert) {
2682                 ucontrol->value.integer.value[0] =
2683                         max - ucontrol->value.integer.value[0];
2684                 ucontrol->value.integer.value[1] =
2685                         max - ucontrol->value.integer.value[1];
2686         }
2687
2688         return 0;
2689 }
2690 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2691
2692 /**
2693  * snd_soc_put_volsw_2r - double mixer set callback
2694  * @kcontrol: mixer control
2695  * @ucontrol: control element information
2696  *
2697  * Callback to set the value of a double mixer control that spans 2 registers.
2698  *
2699  * Returns 0 for success.
2700  */
2701 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2702         struct snd_ctl_elem_value *ucontrol)
2703 {
2704         struct soc_mixer_control *mc =
2705                 (struct soc_mixer_control *)kcontrol->private_value;
2706         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2707         unsigned int reg = mc->reg;
2708         unsigned int reg2 = mc->rreg;
2709         unsigned int shift = mc->shift;
2710         int max = mc->max;
2711         unsigned int mask = (1 << fls(max)) - 1;
2712         unsigned int invert = mc->invert;
2713         int err;
2714         unsigned int val, val2, val_mask;
2715
2716         val_mask = mask << shift;
2717         val = (ucontrol->value.integer.value[0] & mask);
2718         val2 = (ucontrol->value.integer.value[1] & mask);
2719
2720         if (invert) {
2721                 val = max - val;
2722                 val2 = max - val2;
2723         }
2724
2725         val = val << shift;
2726         val2 = val2 << shift;
2727
2728         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2729         if (err < 0)
2730                 return err;
2731
2732         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2733         return err;
2734 }
2735 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2736
2737 /**
2738  * snd_soc_info_volsw_s8 - signed mixer info callback
2739  * @kcontrol: mixer control
2740  * @uinfo: control element information
2741  *
2742  * Callback to provide information about a signed mixer control.
2743  *
2744  * Returns 0 for success.
2745  */
2746 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2747         struct snd_ctl_elem_info *uinfo)
2748 {
2749         struct soc_mixer_control *mc =
2750                 (struct soc_mixer_control *)kcontrol->private_value;
2751         int platform_max;
2752         int min = mc->min;
2753
2754         if (!mc->platform_max)
2755                 mc->platform_max = mc->max;
2756         platform_max = mc->platform_max;
2757
2758         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2759         uinfo->count = 2;
2760         uinfo->value.integer.min = 0;
2761         uinfo->value.integer.max = platform_max - min;
2762         return 0;
2763 }
2764 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2765
2766 /**
2767  * snd_soc_get_volsw_s8 - signed mixer get callback
2768  * @kcontrol: mixer control
2769  * @ucontrol: control element information
2770  *
2771  * Callback to get the value of a signed mixer control.
2772  *
2773  * Returns 0 for success.
2774  */
2775 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2776         struct snd_ctl_elem_value *ucontrol)
2777 {
2778         struct soc_mixer_control *mc =
2779                 (struct soc_mixer_control *)kcontrol->private_value;
2780         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2781         unsigned int reg = mc->reg;
2782         int min = mc->min;
2783         int val = snd_soc_read(codec, reg);
2784
2785         ucontrol->value.integer.value[0] =
2786                 ((signed char)(val & 0xff))-min;
2787         ucontrol->value.integer.value[1] =
2788                 ((signed char)((val >> 8) & 0xff))-min;
2789         return 0;
2790 }
2791 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2792
2793 /**
2794  * snd_soc_put_volsw_sgn - signed mixer put callback
2795  * @kcontrol: mixer control
2796  * @ucontrol: control element information
2797  *
2798  * Callback to set the value of a signed mixer control.
2799  *
2800  * Returns 0 for success.
2801  */
2802 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2803         struct snd_ctl_elem_value *ucontrol)
2804 {
2805         struct soc_mixer_control *mc =
2806                 (struct soc_mixer_control *)kcontrol->private_value;
2807         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2808         unsigned int reg = mc->reg;
2809         int min = mc->min;
2810         unsigned int val;
2811
2812         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2813         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2814
2815         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2816 }
2817 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2818
2819 /**
2820  * snd_soc_limit_volume - Set new limit to an existing volume control.
2821  *
2822  * @codec: where to look for the control
2823  * @name: Name of the control
2824  * @max: new maximum limit
2825  *
2826  * Return 0 for success, else error.
2827  */
2828 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2829         const char *name, int max)
2830 {
2831         struct snd_card *card = codec->card->snd_card;
2832         struct snd_kcontrol *kctl;
2833         struct soc_mixer_control *mc;
2834         int found = 0;
2835         int ret = -EINVAL;
2836
2837         /* Sanity check for name and max */
2838         if (unlikely(!name || max <= 0))
2839                 return -EINVAL;
2840
2841         list_for_each_entry(kctl, &card->controls, list) {
2842                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2843                         found = 1;
2844                         break;
2845                 }
2846         }
2847         if (found) {
2848                 mc = (struct soc_mixer_control *)kctl->private_value;
2849                 if (max <= mc->max) {
2850                         mc->platform_max = max;
2851                         ret = 0;
2852                 }
2853         }
2854         return ret;
2855 }
2856 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2857
2858 /**
2859  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2860  *  mixer info callback
2861  * @kcontrol: mixer control
2862  * @uinfo: control element information
2863  *
2864  * Returns 0 for success.
2865  */
2866 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2867                         struct snd_ctl_elem_info *uinfo)
2868 {
2869         struct soc_mixer_control *mc =
2870                 (struct soc_mixer_control *)kcontrol->private_value;
2871         int max = mc->max;
2872         int min = mc->min;
2873
2874         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2875         uinfo->count = 2;
2876         uinfo->value.integer.min = 0;
2877         uinfo->value.integer.max = max-min;
2878
2879         return 0;
2880 }
2881 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2882
2883 /**
2884  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2885  *  mixer get callback
2886  * @kcontrol: mixer control
2887  * @uinfo: control element information
2888  *
2889  * Returns 0 for success.
2890  */
2891 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2892                         struct snd_ctl_elem_value *ucontrol)
2893 {
2894         struct soc_mixer_control *mc =
2895                 (struct soc_mixer_control *)kcontrol->private_value;
2896         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2897         unsigned int mask = (1<<mc->shift)-1;
2898         int min = mc->min;
2899         int val = snd_soc_read(codec, mc->reg) & mask;
2900         int valr = snd_soc_read(codec, mc->rreg) & mask;
2901
2902         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2903         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2904         return 0;
2905 }
2906 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2907
2908 /**
2909  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2910  *  mixer put callback
2911  * @kcontrol: mixer control
2912  * @uinfo: control element information
2913  *
2914  * Returns 0 for success.
2915  */
2916 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2917                         struct snd_ctl_elem_value *ucontrol)
2918 {
2919         struct soc_mixer_control *mc =
2920                 (struct soc_mixer_control *)kcontrol->private_value;
2921         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2922         unsigned int mask = (1<<mc->shift)-1;
2923         int min = mc->min;
2924         int ret;
2925         unsigned int val, valr, oval, ovalr;
2926
2927         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2928         val &= mask;
2929         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2930         valr &= mask;
2931
2932         oval = snd_soc_read(codec, mc->reg) & mask;
2933         ovalr = snd_soc_read(codec, mc->rreg) & mask;
2934
2935         ret = 0;
2936         if (oval != val) {
2937                 ret = snd_soc_write(codec, mc->reg, val);
2938                 if (ret < 0)
2939                         return ret;
2940         }
2941         if (ovalr != valr) {
2942                 ret = snd_soc_write(codec, mc->rreg, valr);
2943                 if (ret < 0)
2944                         return ret;
2945         }
2946
2947         return 0;
2948 }
2949 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2950
2951 /**
2952  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2953  * @dai: DAI
2954  * @clk_id: DAI specific clock ID
2955  * @freq: new clock frequency in Hz
2956  * @dir: new clock direction - input/output.
2957  *
2958  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2959  */
2960 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2961         unsigned int freq, int dir)
2962 {
2963         if (dai->driver && dai->driver->ops->set_sysclk)
2964                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2965         else
2966                 return -EINVAL;
2967 }
2968 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2969
2970 /**
2971  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2972  * @dai: DAI
2973  * @div_id: DAI specific clock divider ID
2974  * @div: new clock divisor.
2975  *
2976  * Configures the clock dividers. This is used to derive the best DAI bit and
2977  * frame clocks from the system or master clock. It's best to set the DAI bit
2978  * and frame clocks as low as possible to save system power.
2979  */
2980 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2981         int div_id, int div)
2982 {
2983         if (dai->driver && dai->driver->ops->set_clkdiv)
2984                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2985         else
2986                 return -EINVAL;
2987 }
2988 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2989
2990 /**
2991  * snd_soc_dai_set_pll - configure DAI PLL.
2992  * @dai: DAI
2993  * @pll_id: DAI specific PLL ID
2994  * @source: DAI specific source for the PLL
2995  * @freq_in: PLL input clock frequency in Hz
2996  * @freq_out: requested PLL output clock frequency in Hz
2997  *
2998  * Configures and enables PLL to generate output clock based on input clock.
2999  */
3000 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3001         unsigned int freq_in, unsigned int freq_out)
3002 {
3003         if (dai->driver && dai->driver->ops->set_pll)
3004                 return dai->driver->ops->set_pll(dai, pll_id, source,
3005                                          freq_in, freq_out);
3006         else
3007                 return -EINVAL;
3008 }
3009 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3010
3011 /**
3012  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3013  * @dai: DAI
3014  * @fmt: SND_SOC_DAIFMT_ format value.
3015  *
3016  * Configures the DAI hardware format and clocking.
3017  */
3018 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3019 {
3020         if (dai->driver && dai->driver->ops->set_fmt)
3021                 return dai->driver->ops->set_fmt(dai, fmt);
3022         else
3023                 return -EINVAL;
3024 }
3025 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3026
3027 /**
3028  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3029  * @dai: DAI
3030  * @tx_mask: bitmask representing active TX slots.
3031  * @rx_mask: bitmask representing active RX slots.
3032  * @slots: Number of slots in use.
3033  * @slot_width: Width in bits for each slot.
3034  *
3035  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3036  * specific.
3037  */
3038 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3039         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3040 {
3041         if (dai->driver && dai->driver->ops->set_tdm_slot)
3042                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3043                                 slots, slot_width);
3044         else
3045                 return -EINVAL;
3046 }
3047 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3048
3049 /**
3050  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3051  * @dai: DAI
3052  * @tx_num: how many TX channels
3053  * @tx_slot: pointer to an array which imply the TX slot number channel
3054  *           0~num-1 uses
3055  * @rx_num: how many RX channels
3056  * @rx_slot: pointer to an array which imply the RX slot number channel
3057  *           0~num-1 uses
3058  *
3059  * configure the relationship between channel number and TDM slot number.
3060  */
3061 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3062         unsigned int tx_num, unsigned int *tx_slot,
3063         unsigned int rx_num, unsigned int *rx_slot)
3064 {
3065         if (dai->driver && dai->driver->ops->set_channel_map)
3066                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3067                         rx_num, rx_slot);
3068         else
3069                 return -EINVAL;
3070 }
3071 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3072
3073 /**
3074  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3075  * @dai: DAI
3076  * @tristate: tristate enable
3077  *
3078  * Tristates the DAI so that others can use it.
3079  */
3080 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3081 {
3082         if (dai->driver && dai->driver->ops->set_tristate)
3083                 return dai->driver->ops->set_tristate(dai, tristate);
3084         else
3085                 return -EINVAL;
3086 }
3087 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3088
3089 /**
3090  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3091  * @dai: DAI
3092  * @mute: mute enable
3093  *
3094  * Mutes the DAI DAC.
3095  */
3096 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3097 {
3098         if (dai->driver && dai->driver->ops->digital_mute)
3099                 return dai->driver->ops->digital_mute(dai, mute);
3100         else
3101                 return -EINVAL;
3102 }
3103 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3104
3105 /**
3106  * snd_soc_register_card - Register a card with the ASoC core
3107  *
3108  * @card: Card to register
3109  *
3110  * Note that currently this is an internal only function: it will be
3111  * exposed to machine drivers after further backporting of ASoC v2
3112  * registration APIs.
3113  */
3114 static int snd_soc_register_card(struct snd_soc_card *card)
3115 {
3116         int i;
3117
3118         if (!card->name || !card->dev)
3119                 return -EINVAL;
3120
3121         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3122                             (card->num_links + card->num_aux_devs),
3123                             GFP_KERNEL);
3124         if (card->rtd == NULL)
3125                 return -ENOMEM;
3126         card->rtd_aux = &card->rtd[card->num_links];
3127
3128         for (i = 0; i < card->num_links; i++)
3129                 card->rtd[i].dai_link = &card->dai_link[i];
3130
3131         INIT_LIST_HEAD(&card->list);
3132         card->instantiated = 0;
3133         mutex_init(&card->mutex);
3134
3135         mutex_lock(&client_mutex);
3136         list_add(&card->list, &card_list);
3137         snd_soc_instantiate_cards();
3138         mutex_unlock(&client_mutex);
3139
3140         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3141
3142         return 0;
3143 }
3144
3145 /**
3146  * snd_soc_unregister_card - Unregister a card with the ASoC core
3147  *
3148  * @card: Card to unregister
3149  *
3150  * Note that currently this is an internal only function: it will be
3151  * exposed to machine drivers after further backporting of ASoC v2
3152  * registration APIs.
3153  */
3154 static int snd_soc_unregister_card(struct snd_soc_card *card)
3155 {
3156         mutex_lock(&client_mutex);
3157         list_del(&card->list);
3158         mutex_unlock(&client_mutex);
3159         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3160
3161         return 0;
3162 }
3163
3164 /*
3165  * Simplify DAI link configuration by removing ".-1" from device names
3166  * and sanitizing names.
3167  */
3168 static char *fmt_single_name(struct device *dev, int *id)
3169 {
3170         char *found, name[NAME_SIZE];
3171         int id1, id2;
3172
3173         if (dev_name(dev) == NULL)
3174                 return NULL;
3175
3176         strlcpy(name, dev_name(dev), NAME_SIZE);
3177
3178         /* are we a "%s.%d" name (platform and SPI components) */
3179         found = strstr(name, dev->driver->name);
3180         if (found) {
3181                 /* get ID */
3182                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3183
3184                         /* discard ID from name if ID == -1 */
3185                         if (*id == -1)
3186                                 found[strlen(dev->driver->name)] = '\0';
3187                 }
3188
3189         } else {
3190                 /* I2C component devices are named "bus-addr"  */
3191                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3192                         char tmp[NAME_SIZE];
3193
3194                         /* create unique ID number from I2C addr and bus */
3195                         *id = ((id1 & 0xffff) << 16) + id2;
3196
3197                         /* sanitize component name for DAI link creation */
3198                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3199                         strlcpy(name, tmp, NAME_SIZE);
3200                 } else
3201                         *id = 0;
3202         }
3203
3204         return kstrdup(name, GFP_KERNEL);
3205 }
3206
3207 /*
3208  * Simplify DAI link naming for single devices with multiple DAIs by removing
3209  * any ".-1" and using the DAI name (instead of device name).
3210  */
3211 static inline char *fmt_multiple_name(struct device *dev,
3212                 struct snd_soc_dai_driver *dai_drv)
3213 {
3214         if (dai_drv->name == NULL) {
3215                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3216                                 dev_name(dev));
3217                 return NULL;
3218         }
3219
3220         return kstrdup(dai_drv->name, GFP_KERNEL);
3221 }
3222
3223 /**
3224  * snd_soc_register_dai - Register a DAI with the ASoC core
3225  *
3226  * @dai: DAI to register
3227  */
3228 int snd_soc_register_dai(struct device *dev,
3229                 struct snd_soc_dai_driver *dai_drv)
3230 {
3231         struct snd_soc_dai *dai;
3232
3233         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3234
3235         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3236         if (dai == NULL)
3237                         return -ENOMEM;
3238
3239         /* create DAI component name */
3240         dai->name = fmt_single_name(dev, &dai->id);
3241         if (dai->name == NULL) {
3242                 kfree(dai);
3243                 return -ENOMEM;
3244         }
3245
3246         dai->dev = dev;
3247         dai->driver = dai_drv;
3248         if (!dai->driver->ops)
3249                 dai->driver->ops = &null_dai_ops;
3250
3251         mutex_lock(&client_mutex);
3252         list_add(&dai->list, &dai_list);
3253         snd_soc_instantiate_cards();
3254         mutex_unlock(&client_mutex);
3255
3256         pr_debug("Registered DAI '%s'\n", dai->name);
3257
3258         return 0;
3259 }
3260 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3261
3262 /**
3263  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3264  *
3265  * @dai: DAI to unregister
3266  */
3267 void snd_soc_unregister_dai(struct device *dev)
3268 {
3269         struct snd_soc_dai *dai;
3270
3271         list_for_each_entry(dai, &dai_list, list) {
3272                 if (dev == dai->dev)
3273                         goto found;
3274         }
3275         return;
3276
3277 found:
3278         mutex_lock(&client_mutex);
3279         list_del(&dai->list);
3280         mutex_unlock(&client_mutex);
3281
3282         pr_debug("Unregistered DAI '%s'\n", dai->name);
3283         kfree(dai->name);
3284         kfree(dai);
3285 }
3286 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3287
3288 /**
3289  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3290  *
3291  * @dai: Array of DAIs to register
3292  * @count: Number of DAIs
3293  */
3294 int snd_soc_register_dais(struct device *dev,
3295                 struct snd_soc_dai_driver *dai_drv, size_t count)
3296 {
3297         struct snd_soc_dai *dai;
3298         int i, ret = 0;
3299
3300         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3301
3302         for (i = 0; i < count; i++) {
3303
3304                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3305                 if (dai == NULL) {
3306                         ret = -ENOMEM;
3307                         goto err;
3308                 }
3309
3310                 /* create DAI component name */
3311                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3312                 if (dai->name == NULL) {
3313                         kfree(dai);
3314                         ret = -EINVAL;
3315                         goto err;
3316                 }
3317
3318                 dai->dev = dev;
3319                 dai->driver = &dai_drv[i];
3320                 if (dai->driver->id)
3321                         dai->id = dai->driver->id;
3322                 else
3323                         dai->id = i;
3324                 if (!dai->driver->ops)
3325                         dai->driver->ops = &null_dai_ops;
3326
3327                 mutex_lock(&client_mutex);
3328                 list_add(&dai->list, &dai_list);
3329                 mutex_unlock(&client_mutex);
3330
3331                 pr_debug("Registered DAI '%s'\n", dai->name);
3332         }
3333
3334         mutex_lock(&client_mutex);
3335         snd_soc_instantiate_cards();
3336         mutex_unlock(&client_mutex);
3337         return 0;
3338
3339 err:
3340         for (i--; i >= 0; i--)
3341                 snd_soc_unregister_dai(dev);
3342
3343         return ret;
3344 }
3345 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3346
3347 /**
3348  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3349  *
3350  * @dai: Array of DAIs to unregister
3351  * @count: Number of DAIs
3352  */
3353 void snd_soc_unregister_dais(struct device *dev, size_t count)
3354 {
3355         int i;
3356
3357         for (i = 0; i < count; i++)
3358                 snd_soc_unregister_dai(dev);
3359 }
3360 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3361
3362 /**
3363  * snd_soc_register_platform - Register a platform with the ASoC core
3364  *
3365  * @platform: platform to register
3366  */
3367 int snd_soc_register_platform(struct device *dev,
3368                 struct snd_soc_platform_driver *platform_drv)
3369 {
3370         struct snd_soc_platform *platform;
3371
3372         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3373
3374         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3375         if (platform == NULL)
3376                         return -ENOMEM;
3377
3378         /* create platform component name */
3379         platform->name = fmt_single_name(dev, &platform->id);
3380         if (platform->name == NULL) {
3381                 kfree(platform);
3382                 return -ENOMEM;
3383         }
3384
3385         platform->dev = dev;
3386         platform->driver = platform_drv;
3387
3388         mutex_lock(&client_mutex);
3389         list_add(&platform->list, &platform_list);
3390         snd_soc_instantiate_cards();
3391         mutex_unlock(&client_mutex);
3392
3393         pr_debug("Registered platform '%s'\n", platform->name);
3394
3395         return 0;
3396 }
3397 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3398
3399 /**
3400  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3401  *
3402  * @platform: platform to unregister
3403  */
3404 void snd_soc_unregister_platform(struct device *dev)
3405 {
3406         struct snd_soc_platform *platform;
3407
3408         list_for_each_entry(platform, &platform_list, list) {
3409                 if (dev == platform->dev)
3410                         goto found;
3411         }
3412         return;
3413
3414 found:
3415         mutex_lock(&client_mutex);
3416         list_del(&platform->list);
3417         mutex_unlock(&client_mutex);
3418
3419         pr_debug("Unregistered platform '%s'\n", platform->name);
3420         kfree(platform->name);
3421         kfree(platform);
3422 }
3423 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3424
3425 static u64 codec_format_map[] = {
3426         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3427         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3428         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3429         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3430         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3431         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3432         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3433         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3434         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3435         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3436         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3437         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3438         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3439         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3440         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3441         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3442 };
3443
3444 /* Fix up the DAI formats for endianness: codecs don't actually see
3445  * the endianness of the data but we're using the CPU format
3446  * definitions which do need to include endianness so we ensure that
3447  * codec DAIs always have both big and little endian variants set.
3448  */
3449 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3450 {
3451         int i;
3452
3453         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3454                 if (stream->formats & codec_format_map[i])
3455                         stream->formats |= codec_format_map[i];
3456 }
3457
3458 /**
3459  * snd_soc_register_codec - Register a codec with the ASoC core
3460  *
3461  * @codec: codec to register
3462  */
3463 int snd_soc_register_codec(struct device *dev,
3464                            const struct snd_soc_codec_driver *codec_drv,
3465                            struct snd_soc_dai_driver *dai_drv,
3466                            int num_dai)
3467 {
3468         size_t reg_size;
3469         struct snd_soc_codec *codec;
3470         int ret, i;
3471
3472         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3473
3474         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3475         if (codec == NULL)
3476                 return -ENOMEM;
3477
3478         /* create CODEC component name */
3479         codec->name = fmt_single_name(dev, &codec->id);
3480         if (codec->name == NULL) {
3481                 kfree(codec);
3482                 return -ENOMEM;
3483         }
3484
3485         if (codec_drv->compress_type)
3486                 codec->compress_type = codec_drv->compress_type;
3487         else
3488                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3489
3490         codec->write = codec_drv->write;
3491         codec->read = codec_drv->read;
3492         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3493         codec->dapm.dev = dev;
3494         codec->dapm.codec = codec;
3495         codec->dev = dev;
3496         codec->driver = codec_drv;
3497         codec->num_dai = num_dai;
3498         mutex_init(&codec->mutex);
3499
3500         /* allocate CODEC register cache */
3501         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3502                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3503                 codec->reg_size = reg_size;
3504                 /* it is necessary to make a copy of the default register cache
3505                  * because in the case of using a compression type that requires
3506                  * the default register cache to be marked as __devinitconst the
3507                  * kernel might have freed the array by the time we initialize
3508                  * the cache.
3509                  */
3510                 if (codec_drv->reg_cache_default) {
3511                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3512                                                       reg_size, GFP_KERNEL);
3513                         if (!codec->reg_def_copy) {
3514                                 ret = -ENOMEM;
3515                                 goto fail;
3516                         }
3517                 }
3518         }
3519
3520         for (i = 0; i < num_dai; i++) {
3521                 fixup_codec_formats(&dai_drv[i].playback);
3522                 fixup_codec_formats(&dai_drv[i].capture);
3523         }
3524
3525         /* register any DAIs */
3526         if (num_dai) {
3527                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3528                 if (ret < 0)
3529                         goto fail;
3530         }
3531
3532         mutex_lock(&client_mutex);
3533         list_add(&codec->list, &codec_list);
3534         snd_soc_instantiate_cards();
3535         mutex_unlock(&client_mutex);
3536
3537         pr_debug("Registered codec '%s'\n", codec->name);
3538         return 0;
3539
3540 fail:
3541         kfree(codec->reg_def_copy);
3542         codec->reg_def_copy = NULL;
3543         kfree(codec->name);
3544         kfree(codec);
3545         return ret;
3546 }
3547 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3548
3549 /**
3550  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3551  *
3552  * @codec: codec to unregister
3553  */
3554 void snd_soc_unregister_codec(struct device *dev)
3555 {
3556         struct snd_soc_codec *codec;
3557         int i;
3558
3559         list_for_each_entry(codec, &codec_list, list) {
3560                 if (dev == codec->dev)
3561                         goto found;
3562         }
3563         return;
3564
3565 found:
3566         if (codec->num_dai)
3567                 for (i = 0; i < codec->num_dai; i++)
3568                         snd_soc_unregister_dai(dev);
3569
3570         mutex_lock(&client_mutex);
3571         list_del(&codec->list);
3572         mutex_unlock(&client_mutex);
3573
3574         pr_debug("Unregistered codec '%s'\n", codec->name);
3575
3576         snd_soc_cache_exit(codec);
3577         kfree(codec->reg_def_copy);
3578         kfree(codec->name);
3579         kfree(codec);
3580 }
3581 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3582
3583 static int __init snd_soc_init(void)
3584 {
3585 #ifdef CONFIG_DEBUG_FS
3586         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3587         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3588                 printk(KERN_WARNING
3589                        "ASoC: Failed to create debugfs directory\n");
3590                 snd_soc_debugfs_root = NULL;
3591         }
3592
3593         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3594                                  &codec_list_fops))
3595                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3596
3597         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3598                                  &dai_list_fops))
3599                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3600
3601         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3602                                  &platform_list_fops))
3603                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3604 #endif
3605
3606         return platform_driver_register(&soc_driver);
3607 }
3608 module_init(snd_soc_init);
3609
3610 static void __exit snd_soc_exit(void)
3611 {
3612 #ifdef CONFIG_DEBUG_FS
3613         debugfs_remove_recursive(snd_soc_debugfs_root);
3614 #endif
3615         platform_driver_unregister(&soc_driver);
3616 }
3617 module_exit(snd_soc_exit);
3618
3619 /* Module information */
3620 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3621 MODULE_DESCRIPTION("ALSA SoC Core");
3622 MODULE_LICENSE("GPL");
3623 MODULE_ALIAS("platform:soc-audio");