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 *asoc_debugfs_root;
  52 EXPORT_SYMBOL_GPL(asoc_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(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                                                      asoc_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                 /* check to see if we need to override the compress_type */
1752                 for (i = 0; i < card->num_configs; ++i) {
1753                         codec_conf = &card->codec_conf[i];
1754                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1755                                 compress_type = codec_conf->compress_type;
1756                                 if (compress_type && compress_type
1757                                     != codec->compress_type)
1758                                         break;
1759                         }
1760                 }
1761                 if (i == card->num_configs) {
1762                         /* no need to override the compress_type so
1763                          * go ahead and do the standard thing */
1764                         ret = snd_soc_init_codec_cache(codec, 0);
1765                         if (ret < 0) {
1766                                 mutex_unlock(&card->mutex);
1767                                 return;
1768                         }
1769                         continue;
1770                 }
1771                 /* override the compress_type with the one supplied in
1772                  * the machine driver */
1773                 ret = snd_soc_init_codec_cache(codec, compress_type);
1774                 if (ret < 0) {
1775                         mutex_unlock(&card->mutex);
1776                         return;
1777                 }
1778         }
1779
1780         /* card bind complete so register a sound card */
1781         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1782                         card->owner, 0, &card->snd_card);
1783         if (ret < 0) {
1784                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1785                         card->name);
1786                 mutex_unlock(&card->mutex);
1787                 return;
1788         }
1789         card->snd_card->dev = card->dev;
1790
1791 #ifdef CONFIG_PM
1792         /* deferred resume work */
1793         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1794 #endif
1795
1796         /* initialise the sound card only once */
1797         if (card->probe) {
1798                 ret = card->probe(pdev);
1799                 if (ret < 0)
1800                         goto card_probe_error;
1801         }
1802
1803         for (i = 0; i < card->num_links; i++) {
1804                 ret = soc_probe_dai_link(card, i);
1805                 if (ret < 0) {
1806                         pr_err("asoc: failed to instantiate card %s: %d\n",
1807                                card->name, ret);
1808                         goto probe_dai_err;
1809                 }
1810         }
1811
1812         for (i = 0; i < card->num_aux_devs; i++) {
1813                 ret = soc_probe_aux_dev(card, i);
1814                 if (ret < 0) {
1815                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1816                                card->name, ret);
1817                         goto probe_aux_dev_err;
1818                 }
1819         }
1820
1821         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1822                  "%s",  card->name);
1823         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1824                  "%s", card->name);
1825
1826         ret = snd_card_register(card->snd_card);
1827         if (ret < 0) {
1828                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1829                 goto probe_aux_dev_err;
1830         }
1831
1832 #ifdef CONFIG_SND_SOC_AC97_BUS
1833         /* register any AC97 codecs */
1834         for (i = 0; i < card->num_rtd; i++) {
1835                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1836                 if (ret < 0) {
1837                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1838                         while (--i >= 0)
1839                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1840                         goto probe_aux_dev_err;
1841                 }
1842         }
1843 #endif
1844
1845         card->instantiated = 1;
1846         mutex_unlock(&card->mutex);
1847         return;
1848
1849 probe_aux_dev_err:
1850         for (i = 0; i < card->num_aux_devs; i++)
1851                 soc_remove_aux_dev(card, i);
1852
1853 probe_dai_err:
1854         for (i = 0; i < card->num_links; i++)
1855                 soc_remove_dai_link(card, i);
1856
1857 card_probe_error:
1858         if (card->remove)
1859                 card->remove(pdev);
1860
1861         snd_card_free(card->snd_card);
1862
1863         mutex_unlock(&card->mutex);
1864 }
1865
1866 /*
1867  * Attempt to initialise any uninitialised cards.  Must be called with
1868  * client_mutex.
1869  */
1870 static void snd_soc_instantiate_cards(void)
1871 {
1872         struct snd_soc_card *card;
1873         list_for_each_entry(card, &card_list, list)
1874                 snd_soc_instantiate_card(card);
1875 }
1876
1877 /* probes a new socdev */
1878 static int soc_probe(struct platform_device *pdev)
1879 {
1880         struct snd_soc_card *card = platform_get_drvdata(pdev);
1881         int ret = 0;
1882
1883         /* Bodge while we unpick instantiation */
1884         card->dev = &pdev->dev;
1885         INIT_LIST_HEAD(&card->dai_dev_list);
1886         INIT_LIST_HEAD(&card->codec_dev_list);
1887         INIT_LIST_HEAD(&card->platform_dev_list);
1888         INIT_LIST_HEAD(&card->widgets);
1889         INIT_LIST_HEAD(&card->paths);
1890         INIT_LIST_HEAD(&card->dapm_list);
1891
1892         soc_init_card_debugfs(card);
1893
1894         ret = snd_soc_register_card(card);
1895         if (ret != 0) {
1896                 dev_err(&pdev->dev, "Failed to register card\n");
1897                 return ret;
1898         }
1899
1900         return 0;
1901 }
1902
1903 /* removes a socdev */
1904 static int soc_remove(struct platform_device *pdev)
1905 {
1906         struct snd_soc_card *card = platform_get_drvdata(pdev);
1907         int i;
1908
1909                 if (card->instantiated) {
1910
1911                 /* make sure any delayed work runs */
1912                 for (i = 0; i < card->num_rtd; i++) {
1913                         struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1914                         flush_delayed_work_sync(&rtd->delayed_work);
1915                 }
1916
1917                 /* remove auxiliary devices */
1918                 for (i = 0; i < card->num_aux_devs; i++)
1919                         soc_remove_aux_dev(card, i);
1920
1921                 /* remove and free each DAI */
1922                 for (i = 0; i < card->num_rtd; i++)
1923                         soc_remove_dai_link(card, i);
1924
1925                 soc_cleanup_card_debugfs(card);
1926
1927                 /* remove the card */
1928                 if (card->remove)
1929                         card->remove(pdev);
1930
1931                 kfree(card->rtd);
1932                 snd_card_free(card->snd_card);
1933         }
1934         snd_soc_unregister_card(card);
1935         return 0;
1936 }
1937
1938 static int soc_poweroff(struct device *dev)
1939 {
1940         struct platform_device *pdev = to_platform_device(dev);
1941         struct snd_soc_card *card = platform_get_drvdata(pdev);
1942         int i;
1943
1944         if (!card->instantiated)
1945                 return 0;
1946
1947         /* Flush out pmdown_time work - we actually do want to run it
1948          * now, we're shutting down so no imminent restart. */
1949         for (i = 0; i < card->num_rtd; i++) {
1950                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1951                 flush_delayed_work_sync(&rtd->delayed_work);
1952         }
1953
1954         snd_soc_dapm_shutdown(card);
1955
1956         return 0;
1957 }
1958
1959 static const struct dev_pm_ops soc_pm_ops = {
1960         .suspend = soc_suspend,
1961         .resume = soc_resume,
1962         .poweroff = soc_poweroff,
1963 };
1964
1965 /* ASoC platform driver */
1966 static struct platform_driver soc_driver = {
1967         .driver         = {
1968                 .name           = "soc-audio",
1969                 .owner          = THIS_MODULE,
1970                 .pm             = &soc_pm_ops,
1971         },
1972         .probe          = soc_probe,
1973         .remove         = soc_remove,
1974 };
1975
1976 /* create a new pcm */
1977 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
1978 {
1979         struct snd_soc_codec *codec = rtd->codec;
1980         struct snd_soc_platform *platform = rtd->platform;
1981         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1982         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1983         struct snd_pcm *pcm;
1984         char new_name[64];
1985         int ret = 0, playback = 0, capture = 0;
1986
1987         /* check client and interface hw capabilities */
1988         snprintf(new_name, sizeof(new_name), "%s %s-%d",
1989                         rtd->dai_link->stream_name, codec_dai->name, num);
1990
1991         if (codec_dai->driver->playback.channels_min)
1992                 playback = 1;
1993         if (codec_dai->driver->capture.channels_min)
1994                 capture = 1;
1995
1996         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
1997         ret = snd_pcm_new(rtd->card->snd_card, new_name,
1998                         num, playback, capture, &pcm);
1999         if (ret < 0) {
2000                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2001                 return ret;
2002         }
2003
2004         rtd->pcm = pcm;
2005         pcm->private_data = rtd;
2006         soc_pcm_ops.mmap = platform->driver->ops->mmap;
2007         soc_pcm_ops.pointer = platform->driver->ops->pointer;
2008         soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2009         soc_pcm_ops.copy = platform->driver->ops->copy;
2010         soc_pcm_ops.silence = platform->driver->ops->silence;
2011         soc_pcm_ops.ack = platform->driver->ops->ack;
2012         soc_pcm_ops.page = platform->driver->ops->page;
2013
2014         if (playback)
2015                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2016
2017         if (capture)
2018                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2019
2020         ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2021         if (ret < 0) {
2022                 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2023                 return ret;
2024         }
2025
2026         pcm->private_free = platform->driver->pcm_free;
2027         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2028                 cpu_dai->name);
2029         return ret;
2030 }
2031
2032 /**
2033  * snd_soc_codec_volatile_register: Report if a register is volatile.
2034  *
2035  * @codec: CODEC to query.
2036  * @reg: Register to query.
2037  *
2038  * Boolean function indiciating if a CODEC register is volatile.
2039  */
2040 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
2041 {
2042         if (codec->driver->volatile_register)
2043                 return codec->driver->volatile_register(reg);
2044         else
2045                 return 0;
2046 }
2047 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2048
2049 /**
2050  * snd_soc_new_ac97_codec - initailise AC97 device
2051  * @codec: audio codec
2052  * @ops: AC97 bus operations
2053  * @num: AC97 codec number
2054  *
2055  * Initialises AC97 codec resources for use by ad-hoc devices only.
2056  */
2057 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2058         struct snd_ac97_bus_ops *ops, int num)
2059 {
2060         mutex_lock(&codec->mutex);
2061
2062         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2063         if (codec->ac97 == NULL) {
2064                 mutex_unlock(&codec->mutex);
2065                 return -ENOMEM;
2066         }
2067
2068         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2069         if (codec->ac97->bus == NULL) {
2070                 kfree(codec->ac97);
2071                 codec->ac97 = NULL;
2072                 mutex_unlock(&codec->mutex);
2073                 return -ENOMEM;
2074         }
2075
2076         codec->ac97->bus->ops = ops;
2077         codec->ac97->num = num;
2078
2079         /*
2080          * Mark the AC97 device to be created by us. This way we ensure that the
2081          * device will be registered with the device subsystem later on.
2082          */
2083         codec->ac97_created = 1;
2084
2085         mutex_unlock(&codec->mutex);
2086         return 0;
2087 }
2088 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2089
2090 /**
2091  * snd_soc_free_ac97_codec - free AC97 codec device
2092  * @codec: audio codec
2093  *
2094  * Frees AC97 codec device resources.
2095  */
2096 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2097 {
2098         mutex_lock(&codec->mutex);
2099 #ifdef CONFIG_SND_SOC_AC97_BUS
2100         soc_unregister_ac97_dai_link(codec);
2101 #endif
2102         kfree(codec->ac97->bus);
2103         kfree(codec->ac97);
2104         codec->ac97 = NULL;
2105         codec->ac97_created = 0;
2106         mutex_unlock(&codec->mutex);
2107 }
2108 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2109
2110 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2111 {
2112         unsigned int ret;
2113
2114         ret = codec->read(codec, reg);
2115         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2116         trace_snd_soc_reg_read(codec, reg, ret);
2117
2118         return ret;
2119 }
2120 EXPORT_SYMBOL_GPL(snd_soc_read);
2121
2122 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2123                            unsigned int reg, unsigned int val)
2124 {
2125         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2126         trace_snd_soc_reg_write(codec, reg, val);
2127         return codec->write(codec, reg, val);
2128 }
2129 EXPORT_SYMBOL_GPL(snd_soc_write);
2130
2131 /**
2132  * snd_soc_update_bits - update codec register bits
2133  * @codec: audio codec
2134  * @reg: codec register
2135  * @mask: register mask
2136  * @value: new value
2137  *
2138  * Writes new register value.
2139  *
2140  * Returns 1 for change else 0.
2141  */
2142 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2143                                 unsigned int mask, unsigned int value)
2144 {
2145         int change;
2146         unsigned int old, new;
2147
2148         old = snd_soc_read(codec, reg);
2149         new = (old & ~mask) | value;
2150         change = old != new;
2151         if (change)
2152                 snd_soc_write(codec, reg, new);
2153
2154         return change;
2155 }
2156 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2157
2158 /**
2159  * snd_soc_update_bits_locked - update codec register bits
2160  * @codec: audio codec
2161  * @reg: codec register
2162  * @mask: register mask
2163  * @value: new value
2164  *
2165  * Writes new register value, and takes the codec mutex.
2166  *
2167  * Returns 1 for change else 0.
2168  */
2169 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2170                                unsigned short reg, unsigned int mask,
2171                                unsigned int value)
2172 {
2173         int change;
2174
2175         mutex_lock(&codec->mutex);
2176         change = snd_soc_update_bits(codec, reg, mask, value);
2177         mutex_unlock(&codec->mutex);
2178
2179         return change;
2180 }
2181 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2182
2183 /**
2184  * snd_soc_test_bits - test register for change
2185  * @codec: audio codec
2186  * @reg: codec register
2187  * @mask: register mask
2188  * @value: new value
2189  *
2190  * Tests a register with a new value and checks if the new value is
2191  * different from the old value.
2192  *
2193  * Returns 1 for change else 0.
2194  */
2195 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2196                                 unsigned int mask, unsigned int value)
2197 {
2198         int change;
2199         unsigned int old, new;
2200
2201         old = snd_soc_read(codec, reg);
2202         new = (old & ~mask) | value;
2203         change = old != new;
2204
2205         return change;
2206 }
2207 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2208
2209 /**
2210  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2211  * @substream: the pcm substream
2212  * @hw: the hardware parameters
2213  *
2214  * Sets the substream runtime hardware parameters.
2215  */
2216 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2217         const struct snd_pcm_hardware *hw)
2218 {
2219         struct snd_pcm_runtime *runtime = substream->runtime;
2220         runtime->hw.info = hw->info;
2221         runtime->hw.formats = hw->formats;
2222         runtime->hw.period_bytes_min = hw->period_bytes_min;
2223         runtime->hw.period_bytes_max = hw->period_bytes_max;
2224         runtime->hw.periods_min = hw->periods_min;
2225         runtime->hw.periods_max = hw->periods_max;
2226         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2227         runtime->hw.fifo_size = hw->fifo_size;
2228         return 0;
2229 }
2230 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2231
2232 /**
2233  * snd_soc_cnew - create new control
2234  * @_template: control template
2235  * @data: control private data
2236  * @long_name: control long name
2237  *
2238  * Create a new mixer control from a template control.
2239  *
2240  * Returns 0 for success, else error.
2241  */
2242 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2243         void *data, char *long_name)
2244 {
2245         struct snd_kcontrol_new template;
2246
2247         memcpy(&template, _template, sizeof(template));
2248         if (long_name)
2249                 template.name = long_name;
2250         template.index = 0;
2251
2252         return snd_ctl_new1(&template, data);
2253 }
2254 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2255
2256 /**
2257  * snd_soc_add_controls - add an array of controls to a codec.
2258  * Convienience function to add a list of controls. Many codecs were
2259  * duplicating this code.
2260  *
2261  * @codec: codec to add controls to
2262  * @controls: array of controls to add
2263  * @num_controls: number of elements in the array
2264  *
2265  * Return 0 for success, else error.
2266  */
2267 int snd_soc_add_controls(struct snd_soc_codec *codec,
2268         const struct snd_kcontrol_new *controls, int num_controls)
2269 {
2270         struct snd_card *card = codec->card->snd_card;
2271         char prefixed_name[44], *name;
2272         int err, i;
2273
2274         for (i = 0; i < num_controls; i++) {
2275                 const struct snd_kcontrol_new *control = &controls[i];
2276                 if (codec->name_prefix) {
2277                         snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
2278                                  codec->name_prefix, control->name);
2279                         name = prefixed_name;
2280                 } else {
2281                         name = control->name;
2282                 }
2283                 err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
2284                 if (err < 0) {
2285                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2286                                 codec->name, name, err);
2287                         return err;
2288                 }
2289         }
2290
2291         return 0;
2292 }
2293 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2294
2295 /**
2296  * snd_soc_info_enum_double - enumerated double mixer info callback
2297  * @kcontrol: mixer control
2298  * @uinfo: control element information
2299  *
2300  * Callback to provide information about a double enumerated
2301  * mixer control.
2302  *
2303  * Returns 0 for success.
2304  */
2305 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2306         struct snd_ctl_elem_info *uinfo)
2307 {
2308         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2309
2310         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2311         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2312         uinfo->value.enumerated.items = e->max;
2313
2314         if (uinfo->value.enumerated.item > e->max - 1)
2315                 uinfo->value.enumerated.item = e->max - 1;
2316         strcpy(uinfo->value.enumerated.name,
2317                 e->texts[uinfo->value.enumerated.item]);
2318         return 0;
2319 }
2320 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2321
2322 /**
2323  * snd_soc_get_enum_double - enumerated double mixer get callback
2324  * @kcontrol: mixer control
2325  * @ucontrol: control element information
2326  *
2327  * Callback to get the value of a double enumerated mixer.
2328  *
2329  * Returns 0 for success.
2330  */
2331 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2332         struct snd_ctl_elem_value *ucontrol)
2333 {
2334         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2335         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2336         unsigned int val, bitmask;
2337
2338         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2339                 ;
2340         val = snd_soc_read(codec, e->reg);
2341         ucontrol->value.enumerated.item[0]
2342                 = (val >> e->shift_l) & (bitmask - 1);
2343         if (e->shift_l != e->shift_r)
2344                 ucontrol->value.enumerated.item[1] =
2345                         (val >> e->shift_r) & (bitmask - 1);
2346
2347         return 0;
2348 }
2349 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2350
2351 /**
2352  * snd_soc_put_enum_double - enumerated double mixer put callback
2353  * @kcontrol: mixer control
2354  * @ucontrol: control element information
2355  *
2356  * Callback to set the value of a double enumerated mixer.
2357  *
2358  * Returns 0 for success.
2359  */
2360 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2361         struct snd_ctl_elem_value *ucontrol)
2362 {
2363         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2364         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2365         unsigned int val;
2366         unsigned int mask, bitmask;
2367
2368         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2369                 ;
2370         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2371                 return -EINVAL;
2372         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2373         mask = (bitmask - 1) << e->shift_l;
2374         if (e->shift_l != e->shift_r) {
2375                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2376                         return -EINVAL;
2377                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2378                 mask |= (bitmask - 1) << e->shift_r;
2379         }
2380
2381         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2382 }
2383 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2384
2385 /**
2386  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2387  * @kcontrol: mixer control
2388  * @ucontrol: control element information
2389  *
2390  * Callback to get the value of a double semi enumerated mixer.
2391  *
2392  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2393  * used for handling bitfield coded enumeration for example.
2394  *
2395  * Returns 0 for success.
2396  */
2397 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2398         struct snd_ctl_elem_value *ucontrol)
2399 {
2400         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2401         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2402         unsigned int reg_val, val, mux;
2403
2404         reg_val = snd_soc_read(codec, e->reg);
2405         val = (reg_val >> e->shift_l) & e->mask;
2406         for (mux = 0; mux < e->max; mux++) {
2407                 if (val == e->values[mux])
2408                         break;
2409         }
2410         ucontrol->value.enumerated.item[0] = mux;
2411         if (e->shift_l != e->shift_r) {
2412                 val = (reg_val >> e->shift_r) & e->mask;
2413                 for (mux = 0; mux < e->max; mux++) {
2414                         if (val == e->values[mux])
2415                                 break;
2416                 }
2417                 ucontrol->value.enumerated.item[1] = mux;
2418         }
2419
2420         return 0;
2421 }
2422 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2423
2424 /**
2425  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2426  * @kcontrol: mixer control
2427  * @ucontrol: control element information
2428  *
2429  * Callback to set the value of a double semi enumerated mixer.
2430  *
2431  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2432  * used for handling bitfield coded enumeration for example.
2433  *
2434  * Returns 0 for success.
2435  */
2436 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2437         struct snd_ctl_elem_value *ucontrol)
2438 {
2439         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2440         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2441         unsigned int val;
2442         unsigned int mask;
2443
2444         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2445                 return -EINVAL;
2446         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2447         mask = e->mask << e->shift_l;
2448         if (e->shift_l != e->shift_r) {
2449                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2450                         return -EINVAL;
2451                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2452                 mask |= e->mask << e->shift_r;
2453         }
2454
2455         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2456 }
2457 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2458
2459 /**
2460  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2461  * @kcontrol: mixer control
2462  * @uinfo: control element information
2463  *
2464  * Callback to provide information about an external enumerated
2465  * single mixer.
2466  *
2467  * Returns 0 for success.
2468  */
2469 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2470         struct snd_ctl_elem_info *uinfo)
2471 {
2472         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2473
2474         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2475         uinfo->count = 1;
2476         uinfo->value.enumerated.items = e->max;
2477
2478         if (uinfo->value.enumerated.item > e->max - 1)
2479                 uinfo->value.enumerated.item = e->max - 1;
2480         strcpy(uinfo->value.enumerated.name,
2481                 e->texts[uinfo->value.enumerated.item]);
2482         return 0;
2483 }
2484 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2485
2486 /**
2487  * snd_soc_info_volsw_ext - external single mixer info callback
2488  * @kcontrol: mixer control
2489  * @uinfo: control element information
2490  *
2491  * Callback to provide information about a single external mixer control.
2492  *
2493  * Returns 0 for success.
2494  */
2495 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2496         struct snd_ctl_elem_info *uinfo)
2497 {
2498         int max = kcontrol->private_value;
2499
2500         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2501                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2502         else
2503                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2504
2505         uinfo->count = 1;
2506         uinfo->value.integer.min = 0;
2507         uinfo->value.integer.max = max;
2508         return 0;
2509 }
2510 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2511
2512 /**
2513  * snd_soc_info_volsw - single mixer info callback
2514  * @kcontrol: mixer control
2515  * @uinfo: control element information
2516  *
2517  * Callback to provide information about a single mixer control.
2518  *
2519  * Returns 0 for success.
2520  */
2521 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2522         struct snd_ctl_elem_info *uinfo)
2523 {
2524         struct soc_mixer_control *mc =
2525                 (struct soc_mixer_control *)kcontrol->private_value;
2526         int platform_max;
2527         unsigned int shift = mc->shift;
2528         unsigned int rshift = mc->rshift;
2529
2530         if (!mc->platform_max)
2531                 mc->platform_max = mc->max;
2532         platform_max = mc->platform_max;
2533
2534         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2535                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2536         else
2537                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2538
2539         uinfo->count = shift == rshift ? 1 : 2;
2540         uinfo->value.integer.min = 0;
2541         uinfo->value.integer.max = platform_max;
2542         return 0;
2543 }
2544 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2545
2546 /**
2547  * snd_soc_get_volsw - single mixer get callback
2548  * @kcontrol: mixer control
2549  * @ucontrol: control element information
2550  *
2551  * Callback to get the value of a single mixer control.
2552  *
2553  * Returns 0 for success.
2554  */
2555 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2556         struct snd_ctl_elem_value *ucontrol)
2557 {
2558         struct soc_mixer_control *mc =
2559                 (struct soc_mixer_control *)kcontrol->private_value;
2560         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2561         unsigned int reg = mc->reg;
2562         unsigned int shift = mc->shift;
2563         unsigned int rshift = mc->rshift;
2564         int max = mc->max;
2565         unsigned int mask = (1 << fls(max)) - 1;
2566         unsigned int invert = mc->invert;
2567
2568         ucontrol->value.integer.value[0] =
2569                 (snd_soc_read(codec, reg) >> shift) & mask;
2570         if (shift != rshift)
2571                 ucontrol->value.integer.value[1] =
2572                         (snd_soc_read(codec, reg) >> rshift) & mask;
2573         if (invert) {
2574                 ucontrol->value.integer.value[0] =
2575                         max - ucontrol->value.integer.value[0];
2576                 if (shift != rshift)
2577                         ucontrol->value.integer.value[1] =
2578                                 max - ucontrol->value.integer.value[1];
2579         }
2580
2581         return 0;
2582 }
2583 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2584
2585 /**
2586  * snd_soc_put_volsw - single mixer put callback
2587  * @kcontrol: mixer control
2588  * @ucontrol: control element information
2589  *
2590  * Callback to set the value of a single mixer control.
2591  *
2592  * Returns 0 for success.
2593  */
2594 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2595         struct snd_ctl_elem_value *ucontrol)
2596 {
2597         struct soc_mixer_control *mc =
2598                 (struct soc_mixer_control *)kcontrol->private_value;
2599         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2600         unsigned int reg = mc->reg;
2601         unsigned int shift = mc->shift;
2602         unsigned int rshift = mc->rshift;
2603         int max = mc->max;
2604         unsigned int mask = (1 << fls(max)) - 1;
2605         unsigned int invert = mc->invert;
2606         unsigned int val, val2, val_mask;
2607
2608         val = (ucontrol->value.integer.value[0] & mask);
2609         if (invert)
2610                 val = max - val;
2611         val_mask = mask << shift;
2612         val = val << shift;
2613         if (shift != rshift) {
2614                 val2 = (ucontrol->value.integer.value[1] & mask);
2615                 if (invert)
2616                         val2 = max - val2;
2617                 val_mask |= mask << rshift;
2618                 val |= val2 << rshift;
2619         }
2620         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2621 }
2622 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2623
2624 /**
2625  * snd_soc_info_volsw_2r - double mixer info callback
2626  * @kcontrol: mixer control
2627  * @uinfo: control element information
2628  *
2629  * Callback to provide information about a double mixer control that
2630  * spans 2 codec registers.
2631  *
2632  * Returns 0 for success.
2633  */
2634 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2635         struct snd_ctl_elem_info *uinfo)
2636 {
2637         struct soc_mixer_control *mc =
2638                 (struct soc_mixer_control *)kcontrol->private_value;
2639         int platform_max;
2640
2641         if (!mc->platform_max)
2642                 mc->platform_max = mc->max;
2643         platform_max = mc->platform_max;
2644
2645         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2646                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2647         else
2648                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2649
2650         uinfo->count = 2;
2651         uinfo->value.integer.min = 0;
2652         uinfo->value.integer.max = platform_max;
2653         return 0;
2654 }
2655 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2656
2657 /**
2658  * snd_soc_get_volsw_2r - double mixer get callback
2659  * @kcontrol: mixer control
2660  * @ucontrol: control element information
2661  *
2662  * Callback to get the value of a double mixer control that spans 2 registers.
2663  *
2664  * Returns 0 for success.
2665  */
2666 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2667         struct snd_ctl_elem_value *ucontrol)
2668 {
2669         struct soc_mixer_control *mc =
2670                 (struct soc_mixer_control *)kcontrol->private_value;
2671         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2672         unsigned int reg = mc->reg;
2673         unsigned int reg2 = mc->rreg;
2674         unsigned int shift = mc->shift;
2675         int max = mc->max;
2676         unsigned int mask = (1 << fls(max)) - 1;
2677         unsigned int invert = mc->invert;
2678
2679         ucontrol->value.integer.value[0] =
2680                 (snd_soc_read(codec, reg) >> shift) & mask;
2681         ucontrol->value.integer.value[1] =
2682                 (snd_soc_read(codec, reg2) >> shift) & mask;
2683         if (invert) {
2684                 ucontrol->value.integer.value[0] =
2685                         max - ucontrol->value.integer.value[0];
2686                 ucontrol->value.integer.value[1] =
2687                         max - ucontrol->value.integer.value[1];
2688         }
2689
2690         return 0;
2691 }
2692 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2693
2694 /**
2695  * snd_soc_put_volsw_2r - double mixer set callback
2696  * @kcontrol: mixer control
2697  * @ucontrol: control element information
2698  *
2699  * Callback to set the value of a double mixer control that spans 2 registers.
2700  *
2701  * Returns 0 for success.
2702  */
2703 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2704         struct snd_ctl_elem_value *ucontrol)
2705 {
2706         struct soc_mixer_control *mc =
2707                 (struct soc_mixer_control *)kcontrol->private_value;
2708         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2709         unsigned int reg = mc->reg;
2710         unsigned int reg2 = mc->rreg;
2711         unsigned int shift = mc->shift;
2712         int max = mc->max;
2713         unsigned int mask = (1 << fls(max)) - 1;
2714         unsigned int invert = mc->invert;
2715         int err;
2716         unsigned int val, val2, val_mask;
2717
2718         val_mask = mask << shift;
2719         val = (ucontrol->value.integer.value[0] & mask);
2720         val2 = (ucontrol->value.integer.value[1] & mask);
2721
2722         if (invert) {
2723                 val = max - val;
2724                 val2 = max - val2;
2725         }
2726
2727         val = val << shift;
2728         val2 = val2 << shift;
2729
2730         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2731         if (err < 0)
2732                 return err;
2733
2734         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2735         return err;
2736 }
2737 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2738
2739 /**
2740  * snd_soc_info_volsw_s8 - signed mixer info callback
2741  * @kcontrol: mixer control
2742  * @uinfo: control element information
2743  *
2744  * Callback to provide information about a signed mixer control.
2745  *
2746  * Returns 0 for success.
2747  */
2748 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2749         struct snd_ctl_elem_info *uinfo)
2750 {
2751         struct soc_mixer_control *mc =
2752                 (struct soc_mixer_control *)kcontrol->private_value;
2753         int platform_max;
2754         int min = mc->min;
2755
2756         if (!mc->platform_max)
2757                 mc->platform_max = mc->max;
2758         platform_max = mc->platform_max;
2759
2760         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2761         uinfo->count = 2;
2762         uinfo->value.integer.min = 0;
2763         uinfo->value.integer.max = platform_max - min;
2764         return 0;
2765 }
2766 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2767
2768 /**
2769  * snd_soc_get_volsw_s8 - signed mixer get callback
2770  * @kcontrol: mixer control
2771  * @ucontrol: control element information
2772  *
2773  * Callback to get the value of a signed mixer control.
2774  *
2775  * Returns 0 for success.
2776  */
2777 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2778         struct snd_ctl_elem_value *ucontrol)
2779 {
2780         struct soc_mixer_control *mc =
2781                 (struct soc_mixer_control *)kcontrol->private_value;
2782         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2783         unsigned int reg = mc->reg;
2784         int min = mc->min;
2785         int val = snd_soc_read(codec, reg);
2786
2787         ucontrol->value.integer.value[0] =
2788                 ((signed char)(val & 0xff))-min;
2789         ucontrol->value.integer.value[1] =
2790                 ((signed char)((val >> 8) & 0xff))-min;
2791         return 0;
2792 }
2793 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2794
2795 /**
2796  * snd_soc_put_volsw_sgn - signed mixer put callback
2797  * @kcontrol: mixer control
2798  * @ucontrol: control element information
2799  *
2800  * Callback to set the value of a signed mixer control.
2801  *
2802  * Returns 0 for success.
2803  */
2804 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2805         struct snd_ctl_elem_value *ucontrol)
2806 {
2807         struct soc_mixer_control *mc =
2808                 (struct soc_mixer_control *)kcontrol->private_value;
2809         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2810         unsigned int reg = mc->reg;
2811         int min = mc->min;
2812         unsigned int val;
2813
2814         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2815         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2816
2817         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2818 }
2819 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2820
2821 /**
2822  * snd_soc_limit_volume - Set new limit to an existing volume control.
2823  *
2824  * @codec: where to look for the control
2825  * @name: Name of the control
2826  * @max: new maximum limit
2827  *
2828  * Return 0 for success, else error.
2829  */
2830 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2831         const char *name, int max)
2832 {
2833         struct snd_card *card = codec->card->snd_card;
2834         struct snd_kcontrol *kctl;
2835         struct soc_mixer_control *mc;
2836         int found = 0;
2837         int ret = -EINVAL;
2838
2839         /* Sanity check for name and max */
2840         if (unlikely(!name || max <= 0))
2841                 return -EINVAL;
2842
2843         list_for_each_entry(kctl, &card->controls, list) {
2844                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2845                         found = 1;
2846                         break;
2847                 }
2848         }
2849         if (found) {
2850                 mc = (struct soc_mixer_control *)kctl->private_value;
2851                 if (max <= mc->max) {
2852                         mc->platform_max = max;
2853                         ret = 0;
2854                 }
2855         }
2856         return ret;
2857 }
2858 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2859
2860 /**
2861  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2862  *  mixer info callback
2863  * @kcontrol: mixer control
2864  * @uinfo: control element information
2865  *
2866  * Returns 0 for success.
2867  */
2868 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2869                         struct snd_ctl_elem_info *uinfo)
2870 {
2871         struct soc_mixer_control *mc =
2872                 (struct soc_mixer_control *)kcontrol->private_value;
2873         int max = mc->max;
2874         int min = mc->min;
2875
2876         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2877         uinfo->count = 2;
2878         uinfo->value.integer.min = 0;
2879         uinfo->value.integer.max = max-min;
2880
2881         return 0;
2882 }
2883 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2884
2885 /**
2886  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2887  *  mixer get callback
2888  * @kcontrol: mixer control
2889  * @uinfo: control element information
2890  *
2891  * Returns 0 for success.
2892  */
2893 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2894                         struct snd_ctl_elem_value *ucontrol)
2895 {
2896         struct soc_mixer_control *mc =
2897                 (struct soc_mixer_control *)kcontrol->private_value;
2898         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2899         unsigned int mask = (1<<mc->shift)-1;
2900         int min = mc->min;
2901         int val = snd_soc_read(codec, mc->reg) & mask;
2902         int valr = snd_soc_read(codec, mc->rreg) & mask;
2903
2904         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2905         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2906         return 0;
2907 }
2908 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2909
2910 /**
2911  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2912  *  mixer put callback
2913  * @kcontrol: mixer control
2914  * @uinfo: control element information
2915  *
2916  * Returns 0 for success.
2917  */
2918 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2919                         struct snd_ctl_elem_value *ucontrol)
2920 {
2921         struct soc_mixer_control *mc =
2922                 (struct soc_mixer_control *)kcontrol->private_value;
2923         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2924         unsigned int mask = (1<<mc->shift)-1;
2925         int min = mc->min;
2926         int ret;
2927         unsigned int val, valr, oval, ovalr;
2928
2929         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2930         val &= mask;
2931         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2932         valr &= mask;
2933
2934         oval = snd_soc_read(codec, mc->reg) & mask;
2935         ovalr = snd_soc_read(codec, mc->rreg) & mask;
2936
2937         ret = 0;
2938         if (oval != val) {
2939                 ret = snd_soc_write(codec, mc->reg, val);
2940                 if (ret < 0)
2941                         return ret;
2942         }
2943         if (ovalr != valr) {
2944                 ret = snd_soc_write(codec, mc->rreg, valr);
2945                 if (ret < 0)
2946                         return ret;
2947         }
2948
2949         return 0;
2950 }
2951 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2952
2953 /**
2954  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2955  * @dai: DAI
2956  * @clk_id: DAI specific clock ID
2957  * @freq: new clock frequency in Hz
2958  * @dir: new clock direction - input/output.
2959  *
2960  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2961  */
2962 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2963         unsigned int freq, int dir)
2964 {
2965         if (dai->driver && dai->driver->ops->set_sysclk)
2966                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2967         else
2968                 return -EINVAL;
2969 }
2970 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2971
2972 /**
2973  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2974  * @dai: DAI
2975  * @div_id: DAI specific clock divider ID
2976  * @div: new clock divisor.
2977  *
2978  * Configures the clock dividers. This is used to derive the best DAI bit and
2979  * frame clocks from the system or master clock. It's best to set the DAI bit
2980  * and frame clocks as low as possible to save system power.
2981  */
2982 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2983         int div_id, int div)
2984 {
2985         if (dai->driver && dai->driver->ops->set_clkdiv)
2986                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2987         else
2988                 return -EINVAL;
2989 }
2990 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2991
2992 /**
2993  * snd_soc_dai_set_pll - configure DAI PLL.
2994  * @dai: DAI
2995  * @pll_id: DAI specific PLL ID
2996  * @source: DAI specific source for the PLL
2997  * @freq_in: PLL input clock frequency in Hz
2998  * @freq_out: requested PLL output clock frequency in Hz
2999  *
3000  * Configures and enables PLL to generate output clock based on input clock.
3001  */
3002 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3003         unsigned int freq_in, unsigned int freq_out)
3004 {
3005         if (dai->driver && dai->driver->ops->set_pll)
3006                 return dai->driver->ops->set_pll(dai, pll_id, source,
3007                                          freq_in, freq_out);
3008         else
3009                 return -EINVAL;
3010 }
3011 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3012
3013 /**
3014  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3015  * @dai: DAI
3016  * @fmt: SND_SOC_DAIFMT_ format value.
3017  *
3018  * Configures the DAI hardware format and clocking.
3019  */
3020 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3021 {
3022         if (dai->driver && dai->driver->ops->set_fmt)
3023                 return dai->driver->ops->set_fmt(dai, fmt);
3024         else
3025                 return -EINVAL;
3026 }
3027 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3028
3029 /**
3030  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3031  * @dai: DAI
3032  * @tx_mask: bitmask representing active TX slots.
3033  * @rx_mask: bitmask representing active RX slots.
3034  * @slots: Number of slots in use.
3035  * @slot_width: Width in bits for each slot.
3036  *
3037  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3038  * specific.
3039  */
3040 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3041         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3042 {
3043         if (dai->driver && dai->driver->ops->set_tdm_slot)
3044                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3045                                 slots, slot_width);
3046         else
3047                 return -EINVAL;
3048 }
3049 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3050
3051 /**
3052  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3053  * @dai: DAI
3054  * @tx_num: how many TX channels
3055  * @tx_slot: pointer to an array which imply the TX slot number channel
3056  *           0~num-1 uses
3057  * @rx_num: how many RX channels
3058  * @rx_slot: pointer to an array which imply the RX slot number channel
3059  *           0~num-1 uses
3060  *
3061  * configure the relationship between channel number and TDM slot number.
3062  */
3063 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3064         unsigned int tx_num, unsigned int *tx_slot,
3065         unsigned int rx_num, unsigned int *rx_slot)
3066 {
3067         if (dai->driver && dai->driver->ops->set_channel_map)
3068                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3069                         rx_num, rx_slot);
3070         else
3071                 return -EINVAL;
3072 }
3073 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3074
3075 /**
3076  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3077  * @dai: DAI
3078  * @tristate: tristate enable
3079  *
3080  * Tristates the DAI so that others can use it.
3081  */
3082 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3083 {
3084         if (dai->driver && dai->driver->ops->set_tristate)
3085                 return dai->driver->ops->set_tristate(dai, tristate);
3086         else
3087                 return -EINVAL;
3088 }
3089 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3090
3091 /**
3092  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3093  * @dai: DAI
3094  * @mute: mute enable
3095  *
3096  * Mutes the DAI DAC.
3097  */
3098 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3099 {
3100         if (dai->driver && dai->driver->ops->digital_mute)
3101                 return dai->driver->ops->digital_mute(dai, mute);
3102         else
3103                 return -EINVAL;
3104 }
3105 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3106
3107 /**
3108  * snd_soc_register_card - Register a card with the ASoC core
3109  *
3110  * @card: Card to register
3111  *
3112  * Note that currently this is an internal only function: it will be
3113  * exposed to machine drivers after further backporting of ASoC v2
3114  * registration APIs.
3115  */
3116 static int snd_soc_register_card(struct snd_soc_card *card)
3117 {
3118         int i;
3119
3120         if (!card->name || !card->dev)
3121                 return -EINVAL;
3122
3123         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3124                             (card->num_links + card->num_aux_devs),
3125                             GFP_KERNEL);
3126         if (card->rtd == NULL)
3127                 return -ENOMEM;
3128         card->rtd_aux = &card->rtd[card->num_links];
3129
3130         for (i = 0; i < card->num_links; i++)
3131                 card->rtd[i].dai_link = &card->dai_link[i];
3132
3133         INIT_LIST_HEAD(&card->list);
3134         card->instantiated = 0;
3135         mutex_init(&card->mutex);
3136
3137         mutex_lock(&client_mutex);
3138         list_add(&card->list, &card_list);
3139         snd_soc_instantiate_cards();
3140         mutex_unlock(&client_mutex);
3141
3142         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3143
3144         return 0;
3145 }
3146
3147 /**
3148  * snd_soc_unregister_card - Unregister a card with the ASoC core
3149  *
3150  * @card: Card to unregister
3151  *
3152  * Note that currently this is an internal only function: it will be
3153  * exposed to machine drivers after further backporting of ASoC v2
3154  * registration APIs.
3155  */
3156 static int snd_soc_unregister_card(struct snd_soc_card *card)
3157 {
3158         mutex_lock(&client_mutex);
3159         list_del(&card->list);
3160         mutex_unlock(&client_mutex);
3161         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3162
3163         return 0;
3164 }
3165
3166 /*
3167  * Simplify DAI link configuration by removing ".-1" from device names
3168  * and sanitizing names.
3169  */
3170 static char *fmt_single_name(struct device *dev, int *id)
3171 {
3172         char *found, name[NAME_SIZE];
3173         int id1, id2;
3174
3175         if (dev_name(dev) == NULL)
3176                 return NULL;
3177
3178         strlcpy(name, dev_name(dev), NAME_SIZE);
3179
3180         /* are we a "%s.%d" name (platform and SPI components) */
3181         found = strstr(name, dev->driver->name);
3182         if (found) {
3183                 /* get ID */
3184                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3185
3186                         /* discard ID from name if ID == -1 */
3187                         if (*id == -1)
3188                                 found[strlen(dev->driver->name)] = '\0';
3189                 }
3190
3191         } else {
3192                 /* I2C component devices are named "bus-addr"  */
3193                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3194                         char tmp[NAME_SIZE];
3195
3196                         /* create unique ID number from I2C addr and bus */
3197                         *id = ((id1 & 0xffff) << 16) + id2;
3198
3199                         /* sanitize component name for DAI link creation */
3200                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3201                         strlcpy(name, tmp, NAME_SIZE);
3202                 } else
3203                         *id = 0;
3204         }
3205
3206         return kstrdup(name, GFP_KERNEL);
3207 }
3208
3209 /*
3210  * Simplify DAI link naming for single devices with multiple DAIs by removing
3211  * any ".-1" and using the DAI name (instead of device name).
3212  */
3213 static inline char *fmt_multiple_name(struct device *dev,
3214                 struct snd_soc_dai_driver *dai_drv)
3215 {
3216         if (dai_drv->name == NULL) {
3217                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3218                                 dev_name(dev));
3219                 return NULL;
3220         }
3221
3222         return kstrdup(dai_drv->name, GFP_KERNEL);
3223 }
3224
3225 /**
3226  * snd_soc_register_dai - Register a DAI with the ASoC core
3227  *
3228  * @dai: DAI to register
3229  */
3230 int snd_soc_register_dai(struct device *dev,
3231                 struct snd_soc_dai_driver *dai_drv)
3232 {
3233         struct snd_soc_dai *dai;
3234
3235         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3236
3237         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3238         if (dai == NULL)
3239                         return -ENOMEM;
3240
3241         /* create DAI component name */
3242         dai->name = fmt_single_name(dev, &dai->id);
3243         if (dai->name == NULL) {
3244                 kfree(dai);
3245                 return -ENOMEM;
3246         }
3247
3248         dai->dev = dev;
3249         dai->driver = dai_drv;
3250         if (!dai->driver->ops)
3251                 dai->driver->ops = &null_dai_ops;
3252
3253         mutex_lock(&client_mutex);
3254         list_add(&dai->list, &dai_list);
3255         snd_soc_instantiate_cards();
3256         mutex_unlock(&client_mutex);
3257
3258         pr_debug("Registered DAI '%s'\n", dai->name);
3259
3260         return 0;
3261 }
3262 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3263
3264 /**
3265  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3266  *
3267  * @dai: DAI to unregister
3268  */
3269 void snd_soc_unregister_dai(struct device *dev)
3270 {
3271         struct snd_soc_dai *dai;
3272
3273         list_for_each_entry(dai, &dai_list, list) {
3274                 if (dev == dai->dev)
3275                         goto found;
3276         }
3277         return;
3278
3279 found:
3280         mutex_lock(&client_mutex);
3281         list_del(&dai->list);
3282         mutex_unlock(&client_mutex);
3283
3284         pr_debug("Unregistered DAI '%s'\n", dai->name);
3285         kfree(dai->name);
3286         kfree(dai);
3287 }
3288 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3289
3290 /**
3291  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3292  *
3293  * @dai: Array of DAIs to register
3294  * @count: Number of DAIs
3295  */
3296 int snd_soc_register_dais(struct device *dev,
3297                 struct snd_soc_dai_driver *dai_drv, size_t count)
3298 {
3299         struct snd_soc_dai *dai;
3300         int i, ret = 0;
3301
3302         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3303
3304         for (i = 0; i < count; i++) {
3305
3306                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3307                 if (dai == NULL) {
3308                         ret = -ENOMEM;
3309                         goto err;
3310                 }
3311
3312                 /* create DAI component name */
3313                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3314                 if (dai->name == NULL) {
3315                         kfree(dai);
3316                         ret = -EINVAL;
3317                         goto err;
3318                 }
3319
3320                 dai->dev = dev;
3321                 dai->driver = &dai_drv[i];
3322                 if (dai->driver->id)
3323                         dai->id = dai->driver->id;
3324                 else
3325                         dai->id = i;
3326                 if (!dai->driver->ops)
3327                         dai->driver->ops = &null_dai_ops;
3328
3329                 mutex_lock(&client_mutex);
3330                 list_add(&dai->list, &dai_list);
3331                 mutex_unlock(&client_mutex);
3332
3333                 pr_debug("Registered DAI '%s'\n", dai->name);
3334         }
3335
3336         mutex_lock(&client_mutex);
3337         snd_soc_instantiate_cards();
3338         mutex_unlock(&client_mutex);
3339         return 0;
3340
3341 err:
3342         for (i--; i >= 0; i--)
3343                 snd_soc_unregister_dai(dev);
3344
3345         return ret;
3346 }
3347 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3348
3349 /**
3350  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3351  *
3352  * @dai: Array of DAIs to unregister
3353  * @count: Number of DAIs
3354  */
3355 void snd_soc_unregister_dais(struct device *dev, size_t count)
3356 {
3357         int i;
3358
3359         for (i = 0; i < count; i++)
3360                 snd_soc_unregister_dai(dev);
3361 }
3362 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3363
3364 /**
3365  * snd_soc_register_platform - Register a platform with the ASoC core
3366  *
3367  * @platform: platform to register
3368  */
3369 int snd_soc_register_platform(struct device *dev,
3370                 struct snd_soc_platform_driver *platform_drv)
3371 {
3372         struct snd_soc_platform *platform;
3373
3374         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3375
3376         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3377         if (platform == NULL)
3378                         return -ENOMEM;
3379
3380         /* create platform component name */
3381         platform->name = fmt_single_name(dev, &platform->id);
3382         if (platform->name == NULL) {
3383                 kfree(platform);
3384                 return -ENOMEM;
3385         }
3386
3387         platform->dev = dev;
3388         platform->driver = platform_drv;
3389
3390         mutex_lock(&client_mutex);
3391         list_add(&platform->list, &platform_list);
3392         snd_soc_instantiate_cards();
3393         mutex_unlock(&client_mutex);
3394
3395         pr_debug("Registered platform '%s'\n", platform->name);
3396
3397         return 0;
3398 }
3399 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3400
3401 /**
3402  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3403  *
3404  * @platform: platform to unregister
3405  */
3406 void snd_soc_unregister_platform(struct device *dev)
3407 {
3408         struct snd_soc_platform *platform;
3409
3410         list_for_each_entry(platform, &platform_list, list) {
3411                 if (dev == platform->dev)
3412                         goto found;
3413         }
3414         return;
3415
3416 found:
3417         mutex_lock(&client_mutex);
3418         list_del(&platform->list);
3419         mutex_unlock(&client_mutex);
3420
3421         pr_debug("Unregistered platform '%s'\n", platform->name);
3422         kfree(platform->name);
3423         kfree(platform);
3424 }
3425 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3426
3427 static u64 codec_format_map[] = {
3428         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3429         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3430         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3431         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3432         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3433         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3434         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3435         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3436         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3437         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3438         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3439         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3440         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3441         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3442         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3443         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3444 };
3445
3446 /* Fix up the DAI formats for endianness: codecs don't actually see
3447  * the endianness of the data but we're using the CPU format
3448  * definitions which do need to include endianness so we ensure that
3449  * codec DAIs always have both big and little endian variants set.
3450  */
3451 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3452 {
3453         int i;
3454
3455         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3456                 if (stream->formats & codec_format_map[i])
3457                         stream->formats |= codec_format_map[i];
3458 }
3459
3460 /**
3461  * snd_soc_register_codec - Register a codec with the ASoC core
3462  *
3463  * @codec: codec to register
3464  */
3465 int snd_soc_register_codec(struct device *dev,
3466                            const struct snd_soc_codec_driver *codec_drv,
3467                            struct snd_soc_dai_driver *dai_drv,
3468                            int num_dai)
3469 {
3470         size_t reg_size;
3471         struct snd_soc_codec *codec;
3472         int ret, i;
3473
3474         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3475
3476         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3477         if (codec == NULL)
3478                 return -ENOMEM;
3479
3480         /* create CODEC component name */
3481         codec->name = fmt_single_name(dev, &codec->id);
3482         if (codec->name == NULL) {
3483                 kfree(codec);
3484                 return -ENOMEM;
3485         }
3486
3487         if (codec_drv->compress_type)
3488                 codec->compress_type = codec_drv->compress_type;
3489         else
3490                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3491
3492         codec->write = codec_drv->write;
3493         codec->read = codec_drv->read;
3494         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3495         codec->dapm.dev = dev;
3496         codec->dapm.codec = codec;
3497         codec->dev = dev;
3498         codec->driver = codec_drv;
3499         codec->num_dai = num_dai;
3500         mutex_init(&codec->mutex);
3501
3502         /* allocate CODEC register cache */
3503         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3504                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3505                 /* it is necessary to make a copy of the default register cache
3506                  * because in the case of using a compression type that requires
3507                  * the default register cache to be marked as __devinitconst the
3508                  * kernel might have freed the array by the time we initialize
3509                  * the cache.
3510                  */
3511                 if (codec_drv->reg_cache_default) {
3512                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3513                                                       reg_size, GFP_KERNEL);
3514                         if (!codec->reg_def_copy) {
3515                                 ret = -ENOMEM;
3516                                 goto fail;
3517                         }
3518                 }
3519         }
3520
3521         for (i = 0; i < num_dai; i++) {
3522                 fixup_codec_formats(&dai_drv[i].playback);
3523                 fixup_codec_formats(&dai_drv[i].capture);
3524         }
3525
3526         /* register any DAIs */
3527         if (num_dai) {
3528                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3529                 if (ret < 0)
3530                         goto fail;
3531         }
3532
3533         mutex_lock(&client_mutex);
3534         list_add(&codec->list, &codec_list);
3535         snd_soc_instantiate_cards();
3536         mutex_unlock(&client_mutex);
3537
3538         pr_debug("Registered codec '%s'\n", codec->name);
3539         return 0;
3540
3541 fail:
3542         kfree(codec->reg_def_copy);
3543         codec->reg_def_copy = NULL;
3544         kfree(codec->name);
3545         kfree(codec);
3546         return ret;
3547 }
3548 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3549
3550 /**
3551  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3552  *
3553  * @codec: codec to unregister
3554  */
3555 void snd_soc_unregister_codec(struct device *dev)
3556 {
3557         struct snd_soc_codec *codec;
3558         int i;
3559
3560         list_for_each_entry(codec, &codec_list, list) {
3561                 if (dev == codec->dev)
3562                         goto found;
3563         }
3564         return;
3565
3566 found:
3567         if (codec->num_dai)
3568                 for (i = 0; i < codec->num_dai; i++)
3569                         snd_soc_unregister_dai(dev);
3570
3571         mutex_lock(&client_mutex);
3572         list_del(&codec->list);
3573         mutex_unlock(&client_mutex);
3574
3575         pr_debug("Unregistered codec '%s'\n", codec->name);
3576
3577         snd_soc_cache_exit(codec);
3578         kfree(codec->reg_def_copy);
3579         kfree(codec->name);
3580         kfree(codec);
3581 }
3582 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3583
3584 static int __init snd_soc_init(void)
3585 {
3586 #ifdef CONFIG_DEBUG_FS
3587         asoc_debugfs_root = debugfs_create_dir("asoc", NULL);
3588         if (IS_ERR(asoc_debugfs_root) || !asoc_debugfs_root) {
3589                 printk(KERN_WARNING
3590                        "ASoC: Failed to create debugfs directory\n");
3591                 asoc_debugfs_root = NULL;
3592         }
3593
3594         if (!debugfs_create_file("codecs", 0444, asoc_debugfs_root, NULL,
3595                                  &codec_list_fops))
3596                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3597
3598         if (!debugfs_create_file("dais", 0444, asoc_debugfs_root, NULL,
3599                                  &dai_list_fops))
3600                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3601
3602         if (!debugfs_create_file("platforms", 0444, asoc_debugfs_root, NULL,
3603                                  &platform_list_fops))
3604                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3605 #endif
3606
3607         return platform_driver_register(&soc_driver);
3608 }
3609 module_init(snd_soc_init);
3610
3611 static void __exit snd_soc_exit(void)
3612 {
3613 #ifdef CONFIG_DEBUG_FS
3614         debugfs_remove_recursive(asoc_debugfs_root);
3615 #endif
3616         platform_driver_unregister(&soc_driver);
3617 }
3618 module_exit(snd_soc_exit);
3619
3620 /* Module information */
3621 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3622 MODULE_DESCRIPTION("ALSA SoC Core");
3623 MODULE_LICENSE("GPL");
3624 MODULE_ALIAS("platform:soc-audio");