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 static struct dentry *debugfs_root;
  52 #endif
  53
  54 static DEFINE_MUTEX(client_mutex);
  55 static LIST_HEAD(card_list);
  56 static LIST_HEAD(dai_list);
  57 static LIST_HEAD(platform_list);
  58 static LIST_HEAD(codec_list);
  59
  60 static int snd_soc_register_card(struct snd_soc_card *card);
  61 static int snd_soc_unregister_card(struct snd_soc_card *card);
  62 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
  63
  64 /*
  65  * This is a timeout to do a DAPM powerdown after a stream is closed().
  66  * It can be used to eliminate pops between different playback streams, e.g.
  67  * between two audio tracks.
  68  */
  69 static int pmdown_time = 5000;
  70 module_param(pmdown_time, int, 0);
  71 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  72
  73 /*
  74  * This function forces any delayed work to be queued and run.
  75  */
  76 static int run_delayed_work(struct delayed_work *dwork)
  77 {
  78         int ret;
  79
  80         /* cancel any work waiting to be queued. */
  81         ret = cancel_delayed_work(dwork);
  82
  83         /* if there was any work waiting then we run it now and
  84          * wait for it's completion */
  85         if (ret) {
  86                 schedule_delayed_work(dwork, 0);
  87                 flush_scheduled_work();
  88         }
  89         return ret;
  90 }
  91
  92 /* codec register dump */
  93 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
  94 {
  95         int ret, i, step = 1, count = 0;
  96
  97         if (!codec->driver->reg_cache_size)
  98                 return 0;
  99
 100         if (codec->driver->reg_cache_step)
 101                 step = codec->driver->reg_cache_step;
 102
 103         count += sprintf(buf, "%s registers\n", codec->name);
 104         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 105                 if (codec->driver->readable_register && !codec->driver->readable_register(i))
 106                         continue;
 107
 108                 count += sprintf(buf + count, "%2x: ", i);
 109                 if (count >= PAGE_SIZE - 1)
 110                         break;
 111
 112                 if (codec->driver->display_register) {
 113                         count += codec->driver->display_register(codec, buf + count,
 114                                                          PAGE_SIZE - count, i);
 115                 } else {
 116                         /* If the read fails it's almost certainly due to
 117                          * the register being volatile and the device being
 118                          * powered off.
 119                          */
 120                         ret = codec->driver->read(codec, i);
 121                         if (ret >= 0)
 122                                 count += snprintf(buf + count,
 123                                                   PAGE_SIZE - count,
 124                                                   "%4x", ret);
 125                         else
 126                                 count += snprintf(buf + count,
 127                                                   PAGE_SIZE - count,
 128                                                   "<no data: %d>", ret);
 129                 }
 130
 131                 if (count >= PAGE_SIZE - 1)
 132                         break;
 133
 134                 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
 135                 if (count >= PAGE_SIZE - 1)
 136                         break;
 137         }
 138
 139         /* Truncate count; min() would cause a warning */
 140         if (count >= PAGE_SIZE)
 141                 count = PAGE_SIZE - 1;
 142
 143         return count;
 144 }
 145 static ssize_t codec_reg_show(struct device *dev,
 146         struct device_attribute *attr, char *buf)
 147 {
 148         struct snd_soc_pcm_runtime *rtd =
 149                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 150
 151         return soc_codec_reg_show(rtd->codec, buf);
 152 }
 153
 154 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 155
 156 static ssize_t pmdown_time_show(struct device *dev,
 157                                 struct device_attribute *attr, char *buf)
 158 {
 159         struct snd_soc_pcm_runtime *rtd =
 160                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 161
 162         return sprintf(buf, "%ld\n", rtd->pmdown_time);
 163 }
 164
 165 static ssize_t pmdown_time_set(struct device *dev,
 166                                struct device_attribute *attr,
 167                                const char *buf, size_t count)
 168 {
 169         struct snd_soc_pcm_runtime *rtd =
 170                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 171         int ret;
 172
 173         ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 174         if (ret)
 175                 return ret;
 176
 177         return count;
 178 }
 179
 180 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 181
 182 #ifdef CONFIG_DEBUG_FS
 183 static int codec_reg_open_file(struct inode *inode, struct file *file)
 184 {
 185         file->private_data = inode->i_private;
 186         return 0;
 187 }
 188
 189 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 190                                size_t count, loff_t *ppos)
 191 {
 192         ssize_t ret;
 193         struct snd_soc_codec *codec = file->private_data;
 194         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 195         if (!buf)
 196                 return -ENOMEM;
 197         ret = soc_codec_reg_show(codec, buf);
 198         if (ret >= 0)
 199                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 200         kfree(buf);
 201         return ret;
 202 }
 203
 204 static ssize_t codec_reg_write_file(struct file *file,
 205                 const char __user *user_buf, size_t count, loff_t *ppos)
 206 {
 207         char buf[32];
 208         int buf_size;
 209         char *start = buf;
 210         unsigned long reg, value;
 211         int step = 1;
 212         struct snd_soc_codec *codec = file->private_data;
 213
 214         buf_size = min(count, (sizeof(buf)-1));
 215         if (copy_from_user(buf, user_buf, buf_size))
 216                 return -EFAULT;
 217         buf[buf_size] = 0;
 218
 219         if (codec->driver->reg_cache_step)
 220                 step = codec->driver->reg_cache_step;
 221
 222         while (*start == ' ')
 223                 start++;
 224         reg = simple_strtoul(start, &start, 16);
 225         if ((reg >= codec->driver->reg_cache_size) || (reg % step))
 226                 return -EINVAL;
 227         while (*start == ' ')
 228                 start++;
 229         if (strict_strtoul(start, 16, &value))
 230                 return -EINVAL;
 231         codec->driver->write(codec, reg, value);
 232         return buf_size;
 233 }
 234
 235 static const struct file_operations codec_reg_fops = {
 236         .open = codec_reg_open_file,
 237         .read = codec_reg_read_file,
 238         .write = codec_reg_write_file,
 239         .llseek = default_llseek,
 240 };
 241
 242 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 243 {
 244         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 245
 246         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 247                                                        debugfs_card_root);
 248         if (!codec->debugfs_codec_root) {
 249                 printk(KERN_WARNING
 250                        "ASoC: Failed to create codec debugfs directory\n");
 251                 return;
 252         }
 253
 254         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 255                                                  codec->debugfs_codec_root,
 256                                                  codec, &codec_reg_fops);
 257         if (!codec->debugfs_reg)
 258                 printk(KERN_WARNING
 259                        "ASoC: Failed to create codec register debugfs file\n");
 260
 261         codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
 262                                                  codec->debugfs_codec_root);
 263         if (!codec->dapm.debugfs_dapm)
 264                 printk(KERN_WARNING
 265                        "Failed to create DAPM debugfs directory\n");
 266
 267         snd_soc_dapm_debugfs_init(&codec->dapm);
 268 }
 269
 270 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 271 {
 272         debugfs_remove_recursive(codec->debugfs_codec_root);
 273 }
 274
 275 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 276                                     size_t count, loff_t *ppos)
 277 {
 278         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 279         ssize_t len, ret = 0;
 280         struct snd_soc_codec *codec;
 281
 282         if (!buf)
 283                 return -ENOMEM;
 284
 285         list_for_each_entry(codec, &codec_list, list) {
 286                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 287                                codec->name);
 288                 if (len >= 0)
 289                         ret += len;
 290                 if (ret > PAGE_SIZE) {
 291                         ret = PAGE_SIZE;
 292                         break;
 293                 }
 294         }
 295
 296         if (ret >= 0)
 297                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 298
 299         kfree(buf);
 300
 301         return ret;
 302 }
 303
 304 static const struct file_operations codec_list_fops = {
 305         .read = codec_list_read_file,
 306         .llseek = default_llseek,/* read accesses f_pos */
 307 };
 308
 309 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 310                                   size_t count, loff_t *ppos)
 311 {
 312         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 313         ssize_t len, ret = 0;
 314         struct snd_soc_dai *dai;
 315
 316         if (!buf)
 317                 return -ENOMEM;
 318
 319         list_for_each_entry(dai, &dai_list, list) {
 320                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 321                 if (len >= 0)
 322                         ret += len;
 323                 if (ret > PAGE_SIZE) {
 324                         ret = PAGE_SIZE;
 325                         break;
 326                 }
 327         }
 328
 329         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 330
 331         kfree(buf);
 332
 333         return ret;
 334 }
 335
 336 static const struct file_operations dai_list_fops = {
 337         .read = dai_list_read_file,
 338         .llseek = default_llseek,/* read accesses f_pos */
 339 };
 340
 341 static ssize_t platform_list_read_file(struct file *file,
 342                                        char __user *user_buf,
 343                                        size_t count, loff_t *ppos)
 344 {
 345         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 346         ssize_t len, ret = 0;
 347         struct snd_soc_platform *platform;
 348
 349         if (!buf)
 350                 return -ENOMEM;
 351
 352         list_for_each_entry(platform, &platform_list, list) {
 353                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 354                                platform->name);
 355                 if (len >= 0)
 356                         ret += len;
 357                 if (ret > PAGE_SIZE) {
 358                         ret = PAGE_SIZE;
 359                         break;
 360                 }
 361         }
 362
 363         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 364
 365         kfree(buf);
 366
 367         return ret;
 368 }
 369
 370 static const struct file_operations platform_list_fops = {
 371         .read = platform_list_read_file,
 372         .llseek = default_llseek,/* read accesses f_pos */
 373 };
 374
 375 static void soc_init_card_debugfs(struct snd_soc_card *card)
 376 {
 377         card->debugfs_card_root = debugfs_create_dir(card->name,
 378                                                      debugfs_root);
 379         if (!card->debugfs_card_root) {
 380                 dev_warn(card->dev,
 381                          "ASoC: Failed to create codec debugfs directory\n");
 382                 return;
 383         }
 384
 385         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 386                                                     card->debugfs_card_root,
 387                                                     &card->pop_time);
 388         if (!card->debugfs_pop_time)
 389                 dev_warn(card->dev,
 390                        "Failed to create pop time debugfs file\n");
 391 }
 392
 393 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 394 {
 395         debugfs_remove_recursive(card->debugfs_card_root);
 396 }
 397
 398 #else
 399
 400 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 401 {
 402 }
 403
 404 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 405 {
 406 }
 407
 408 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 409 {
 410 }
 411
 412 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 413 {
 414 }
 415 #endif
 416
 417 #ifdef CONFIG_SND_SOC_AC97_BUS
 418 /* unregister ac97 codec */
 419 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 420 {
 421         if (codec->ac97->dev.bus)
 422                 device_unregister(&codec->ac97->dev);
 423         return 0;
 424 }
 425
 426 /* stop no dev release warning */
 427 static void soc_ac97_device_release(struct device *dev){}
 428
 429 /* register ac97 codec to bus */
 430 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 431 {
 432         int err;
 433
 434         codec->ac97->dev.bus = &ac97_bus_type;
 435         codec->ac97->dev.parent = codec->card->dev;
 436         codec->ac97->dev.release = soc_ac97_device_release;
 437
 438         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 439                      codec->card->snd_card->number, 0, codec->name);
 440         err = device_register(&codec->ac97->dev);
 441         if (err < 0) {
 442                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
 443                 codec->ac97->dev.bus = NULL;
 444                 return err;
 445         }
 446         return 0;
 447 }
 448 #endif
 449
 450 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 451 {
 452         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 453         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 454         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 455         int ret;
 456
 457         if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
 458                         rtd->dai_link->symmetric_rates) {
 459                 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
 460                                 rtd->rate);
 461
 462                 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 463                                                    SNDRV_PCM_HW_PARAM_RATE,
 464                                                    rtd->rate,
 465                                                    rtd->rate);
 466                 if (ret < 0) {
 467                         dev_err(&rtd->dev,
 468                                 "Unable to apply rate symmetry constraint: %d\n", ret);
 469                         return ret;
 470                 }
 471         }
 472
 473         return 0;
 474 }
 475
 476 /*
 477  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 478  * then initialized and any private data can be allocated. This also calls
 479  * startup for the cpu DAI, platform, machine and codec DAI.
 480  */
 481 static int soc_pcm_open(struct snd_pcm_substream *substream)
 482 {
 483         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 484         struct snd_pcm_runtime *runtime = substream->runtime;
 485         struct snd_soc_platform *platform = rtd->platform;
 486         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 487         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 488         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 489         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 490         int ret = 0;
 491
 492         mutex_lock(&pcm_mutex);
 493
 494         /* startup the audio subsystem */
 495         if (cpu_dai->driver->ops->startup) {
 496                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 497                 if (ret < 0) {
 498                         printk(KERN_ERR "asoc: can't open interface %s\n",
 499                                 cpu_dai->name);
 500                         goto out;
 501                 }
 502         }
 503
 504         if (platform->driver->ops->open) {
 505                 ret = platform->driver->ops->open(substream);
 506                 if (ret < 0) {
 507                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
 508                         goto platform_err;
 509                 }
 510         }
 511
 512         if (codec_dai->driver->ops->startup) {
 513                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 514                 if (ret < 0) {
 515                         printk(KERN_ERR "asoc: can't open codec %s\n",
 516                                 codec_dai->name);
 517                         goto codec_dai_err;
 518                 }
 519         }
 520
 521         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 522                 ret = rtd->dai_link->ops->startup(substream);
 523                 if (ret < 0) {
 524                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
 525                         goto machine_err;
 526                 }
 527         }
 528
 529         /* Check that the codec and cpu DAIs are compatible */
 530         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 531                 runtime->hw.rate_min =
 532                         max(codec_dai_drv->playback.rate_min,
 533                             cpu_dai_drv->playback.rate_min);
 534                 runtime->hw.rate_max =
 535                         min(codec_dai_drv->playback.rate_max,
 536                             cpu_dai_drv->playback.rate_max);
 537                 runtime->hw.channels_min =
 538                         max(codec_dai_drv->playback.channels_min,
 539                                 cpu_dai_drv->playback.channels_min);
 540                 runtime->hw.channels_max =
 541                         min(codec_dai_drv->playback.channels_max,
 542                                 cpu_dai_drv->playback.channels_max);
 543                 runtime->hw.formats =
 544                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 545                 runtime->hw.rates =
 546                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 547                 if (codec_dai_drv->playback.rates
 548                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 549                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 550                 if (cpu_dai_drv->playback.rates
 551                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 552                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 553         } else {
 554                 runtime->hw.rate_min =
 555                         max(codec_dai_drv->capture.rate_min,
 556                             cpu_dai_drv->capture.rate_min);
 557                 runtime->hw.rate_max =
 558                         min(codec_dai_drv->capture.rate_max,
 559                             cpu_dai_drv->capture.rate_max);
 560                 runtime->hw.channels_min =
 561                         max(codec_dai_drv->capture.channels_min,
 562                                 cpu_dai_drv->capture.channels_min);
 563                 runtime->hw.channels_max =
 564                         min(codec_dai_drv->capture.channels_max,
 565                                 cpu_dai_drv->capture.channels_max);
 566                 runtime->hw.formats =
 567                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 568                 runtime->hw.rates =
 569                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 570                 if (codec_dai_drv->capture.rates
 571                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 572                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 573                 if (cpu_dai_drv->capture.rates
 574                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 575                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 576         }
 577
 578         snd_pcm_limit_hw_rates(runtime);
 579         if (!runtime->hw.rates) {
 580                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 581                         codec_dai->name, cpu_dai->name);
 582                 goto config_err;
 583         }
 584         if (!runtime->hw.formats) {
 585                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 586                         codec_dai->name, cpu_dai->name);
 587                 goto config_err;
 588         }
 589         if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
 590                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 591                                 codec_dai->name, cpu_dai->name);
 592                 goto config_err;
 593         }
 594
 595         /* Symmetry only applies if we've already got an active stream. */
 596         if (cpu_dai->active || codec_dai->active) {
 597                 ret = soc_pcm_apply_symmetry(substream);
 598                 if (ret != 0)
 599                         goto config_err;
 600         }
 601
 602         pr_debug("asoc: %s <-> %s info:\n",
 603                         codec_dai->name, cpu_dai->name);
 604         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 605         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 606                  runtime->hw.channels_max);
 607         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 608                  runtime->hw.rate_max);
 609
 610         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 611                 cpu_dai->playback_active++;
 612                 codec_dai->playback_active++;
 613         } else {
 614                 cpu_dai->capture_active++;
 615                 codec_dai->capture_active++;
 616         }
 617         cpu_dai->active++;
 618         codec_dai->active++;
 619         rtd->codec->active++;
 620         mutex_unlock(&pcm_mutex);
 621         return 0;
 622
 623 config_err:
 624         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 625                 rtd->dai_link->ops->shutdown(substream);
 626
 627 machine_err:
 628         if (codec_dai->driver->ops->shutdown)
 629                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 630
 631 codec_dai_err:
 632         if (platform->driver->ops->close)
 633                 platform->driver->ops->close(substream);
 634
 635 platform_err:
 636         if (cpu_dai->driver->ops->shutdown)
 637                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 638 out:
 639         mutex_unlock(&pcm_mutex);
 640         return ret;
 641 }
 642
 643 /*
 644  * Power down the audio subsystem pmdown_time msecs after close is called.
 645  * This is to ensure there are no pops or clicks in between any music tracks
 646  * due to DAPM power cycling.
 647  */
 648 static void close_delayed_work(struct work_struct *work)
 649 {
 650         struct snd_soc_pcm_runtime *rtd =
 651                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 652         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 653
 654         mutex_lock(&pcm_mutex);
 655
 656         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 657                  codec_dai->driver->playback.stream_name,
 658                  codec_dai->playback_active ? "active" : "inactive",
 659                  codec_dai->pop_wait ? "yes" : "no");
 660
 661         /* are we waiting on this codec DAI stream */
 662         if (codec_dai->pop_wait == 1) {
 663                 codec_dai->pop_wait = 0;
 664                 snd_soc_dapm_stream_event(rtd,
 665                         codec_dai->driver->playback.stream_name,
 666                         SND_SOC_DAPM_STREAM_STOP);
 667         }
 668
 669         mutex_unlock(&pcm_mutex);
 670 }
 671
 672 /*
 673  * Called by ALSA when a PCM substream is closed. Private data can be
 674  * freed here. The cpu DAI, codec DAI, machine and platform are also
 675  * shutdown.
 676  */
 677 static int soc_codec_close(struct snd_pcm_substream *substream)
 678 {
 679         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 680         struct snd_soc_platform *platform = rtd->platform;
 681         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 682         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 683         struct snd_soc_codec *codec = rtd->codec;
 684
 685         mutex_lock(&pcm_mutex);
 686
 687         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 688                 cpu_dai->playback_active--;
 689                 codec_dai->playback_active--;
 690         } else {
 691                 cpu_dai->capture_active--;
 692                 codec_dai->capture_active--;
 693         }
 694
 695         cpu_dai->active--;
 696         codec_dai->active--;
 697         codec->active--;
 698
 699         /* Muting the DAC suppresses artifacts caused during digital
 700          * shutdown, for example from stopping clocks.
 701          */
 702         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 703                 snd_soc_dai_digital_mute(codec_dai, 1);
 704
 705         if (cpu_dai->driver->ops->shutdown)
 706                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 707
 708         if (codec_dai->driver->ops->shutdown)
 709                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 710
 711         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 712                 rtd->dai_link->ops->shutdown(substream);
 713
 714         if (platform->driver->ops->close)
 715                 platform->driver->ops->close(substream);
 716         cpu_dai->runtime = NULL;
 717
 718         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 719                 /* start delayed pop wq here for playback streams */
 720                 codec_dai->pop_wait = 1;
 721                 schedule_delayed_work(&rtd->delayed_work,
 722                         msecs_to_jiffies(rtd->pmdown_time));
 723         } else {
 724                 /* capture streams can be powered down now */
 725                 snd_soc_dapm_stream_event(rtd,
 726                         codec_dai->driver->capture.stream_name,
 727                         SND_SOC_DAPM_STREAM_STOP);
 728         }
 729
 730         mutex_unlock(&pcm_mutex);
 731         return 0;
 732 }
 733
 734 /*
 735  * Called by ALSA when the PCM substream is prepared, can set format, sample
 736  * rate, etc.  This function is non atomic and can be called multiple times,
 737  * it can refer to the runtime info.
 738  */
 739 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 740 {
 741         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 742         struct snd_soc_platform *platform = rtd->platform;
 743         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 744         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 745         int ret = 0;
 746
 747         mutex_lock(&pcm_mutex);
 748
 749         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 750                 ret = rtd->dai_link->ops->prepare(substream);
 751                 if (ret < 0) {
 752                         printk(KERN_ERR "asoc: machine prepare error\n");
 753                         goto out;
 754                 }
 755         }
 756
 757         if (platform->driver->ops->prepare) {
 758                 ret = platform->driver->ops->prepare(substream);
 759                 if (ret < 0) {
 760                         printk(KERN_ERR "asoc: platform prepare error\n");
 761                         goto out;
 762                 }
 763         }
 764
 765         if (codec_dai->driver->ops->prepare) {
 766                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 767                 if (ret < 0) {
 768                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
 769                         goto out;
 770                 }
 771         }
 772
 773         if (cpu_dai->driver->ops->prepare) {
 774                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 775                 if (ret < 0) {
 776                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
 777                         goto out;
 778                 }
 779         }
 780
 781         /* cancel any delayed stream shutdown that is pending */
 782         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 783             codec_dai->pop_wait) {
 784                 codec_dai->pop_wait = 0;
 785                 cancel_delayed_work(&rtd->delayed_work);
 786         }
 787
 788         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 789                 snd_soc_dapm_stream_event(rtd,
 790                                           codec_dai->driver->playback.stream_name,
 791                                           SND_SOC_DAPM_STREAM_START);
 792         else
 793                 snd_soc_dapm_stream_event(rtd,
 794                                           codec_dai->driver->capture.stream_name,
 795                                           SND_SOC_DAPM_STREAM_START);
 796
 797         snd_soc_dai_digital_mute(codec_dai, 0);
 798
 799 out:
 800         mutex_unlock(&pcm_mutex);
 801         return ret;
 802 }
 803
 804 /*
 805  * Called by ALSA when the hardware params are set by application. This
 806  * function can also be called multiple times and can allocate buffers
 807  * (using snd_pcm_lib_* ). It's non-atomic.
 808  */
 809 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 810                                 struct snd_pcm_hw_params *params)
 811 {
 812         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 813         struct snd_soc_platform *platform = rtd->platform;
 814         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 815         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 816         int ret = 0;
 817
 818         mutex_lock(&pcm_mutex);
 819
 820         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 821                 ret = rtd->dai_link->ops->hw_params(substream, params);
 822                 if (ret < 0) {
 823                         printk(KERN_ERR "asoc: machine hw_params failed\n");
 824                         goto out;
 825                 }
 826         }
 827
 828         if (codec_dai->driver->ops->hw_params) {
 829                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 830                 if (ret < 0) {
 831                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
 832                                 codec_dai->name);
 833                         goto codec_err;
 834                 }
 835         }
 836
 837         if (cpu_dai->driver->ops->hw_params) {
 838                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 839                 if (ret < 0) {
 840                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
 841                                 cpu_dai->name);
 842                         goto interface_err;
 843                 }
 844         }
 845
 846         if (platform->driver->ops->hw_params) {
 847                 ret = platform->driver->ops->hw_params(substream, params);
 848                 if (ret < 0) {
 849                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
 850                                 platform->name);
 851                         goto platform_err;
 852                 }
 853         }
 854
 855         rtd->rate = params_rate(params);
 856
 857 out:
 858         mutex_unlock(&pcm_mutex);
 859         return ret;
 860
 861 platform_err:
 862         if (cpu_dai->driver->ops->hw_free)
 863                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 864
 865 interface_err:
 866         if (codec_dai->driver->ops->hw_free)
 867                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 868
 869 codec_err:
 870         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 871                 rtd->dai_link->ops->hw_free(substream);
 872
 873         mutex_unlock(&pcm_mutex);
 874         return ret;
 875 }
 876
 877 /*
 878  * Frees resources allocated by hw_params, can be called multiple times
 879  */
 880 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 881 {
 882         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 883         struct snd_soc_platform *platform = rtd->platform;
 884         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 885         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 886         struct snd_soc_codec *codec = rtd->codec;
 887
 888         mutex_lock(&pcm_mutex);
 889
 890         /* apply codec digital mute */
 891         if (!codec->active)
 892                 snd_soc_dai_digital_mute(codec_dai, 1);
 893
 894         /* free any machine hw params */
 895         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 896                 rtd->dai_link->ops->hw_free(substream);
 897
 898         /* free any DMA resources */
 899         if (platform->driver->ops->hw_free)
 900                 platform->driver->ops->hw_free(substream);
 901
 902         /* now free hw params for the DAIs  */
 903         if (codec_dai->driver->ops->hw_free)
 904                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 905
 906         if (cpu_dai->driver->ops->hw_free)
 907                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 908
 909         mutex_unlock(&pcm_mutex);
 910         return 0;
 911 }
 912
 913 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 914 {
 915         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 916         struct snd_soc_platform *platform = rtd->platform;
 917         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 918         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 919         int ret;
 920
 921         if (codec_dai->driver->ops->trigger) {
 922                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 923                 if (ret < 0)
 924                         return ret;
 925         }
 926
 927         if (platform->driver->ops->trigger) {
 928                 ret = platform->driver->ops->trigger(substream, cmd);
 929                 if (ret < 0)
 930                         return ret;
 931         }
 932
 933         if (cpu_dai->driver->ops->trigger) {
 934                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 935                 if (ret < 0)
 936                         return ret;
 937         }
 938         return 0;
 939 }
 940
 941 /*
 942  * soc level wrapper for pointer callback
 943  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 944  * the runtime->delay will be updated accordingly.
 945  */
 946 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 947 {
 948         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 949         struct snd_soc_platform *platform = rtd->platform;
 950         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 951         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 952         struct snd_pcm_runtime *runtime = substream->runtime;
 953         snd_pcm_uframes_t offset = 0;
 954         snd_pcm_sframes_t delay = 0;
 955
 956         if (platform->driver->ops->pointer)
 957                 offset = platform->driver->ops->pointer(substream);
 958
 959         if (cpu_dai->driver->ops->delay)
 960                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
 961
 962         if (codec_dai->driver->ops->delay)
 963                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
 964
 965         if (platform->driver->delay)
 966                 delay += platform->driver->delay(substream, codec_dai);
 967
 968         runtime->delay = delay;
 969
 970         return offset;
 971 }
 972
 973 /* ASoC PCM operations */
 974 static struct snd_pcm_ops soc_pcm_ops = {
 975         .open           = soc_pcm_open,
 976         .close          = soc_codec_close,
 977         .hw_params      = soc_pcm_hw_params,
 978         .hw_free        = soc_pcm_hw_free,
 979         .prepare        = soc_pcm_prepare,
 980         .trigger        = soc_pcm_trigger,
 981         .pointer        = soc_pcm_pointer,
 982 };
 983
 984 #ifdef CONFIG_PM
 985 /* powers down audio subsystem for suspend */
 986 static int soc_suspend(struct device *dev)
 987 {
 988         struct platform_device *pdev = to_platform_device(dev);
 989         struct snd_soc_card *card = platform_get_drvdata(pdev);
 990         struct snd_soc_codec *codec;
 991         int i;
 992
 993         /* If the initialization of this soc device failed, there is no codec
 994          * associated with it. Just bail out in this case.
 995          */
 996         if (list_empty(&card->codec_dev_list))
 997                 return 0;
 998
 999         /* Due to the resume being scheduled into a workqueue we could
1000         * suspend before that's finished - wait for it to complete.
1001          */
1002         snd_power_lock(card->snd_card);
1003         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1004         snd_power_unlock(card->snd_card);
1005
1006         /* we're going to block userspace touching us until resume completes */
1007         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1008
1009         /* mute any active DACs */
1010         for (i = 0; i < card->num_rtd; i++) {
1011                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1012                 struct snd_soc_dai_driver *drv = dai->driver;
1013
1014                 if (card->rtd[i].dai_link->ignore_suspend)
1015                         continue;
1016
1017                 if (drv->ops->digital_mute && dai->playback_active)
1018                         drv->ops->digital_mute(dai, 1);
1019         }
1020
1021         /* suspend all pcms */
1022         for (i = 0; i < card->num_rtd; i++) {
1023                 if (card->rtd[i].dai_link->ignore_suspend)
1024                         continue;
1025
1026                 snd_pcm_suspend_all(card->rtd[i].pcm);
1027         }
1028
1029         if (card->suspend_pre)
1030                 card->suspend_pre(pdev, PMSG_SUSPEND);
1031
1032         for (i = 0; i < card->num_rtd; i++) {
1033                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1034                 struct snd_soc_platform *platform = card->rtd[i].platform;
1035
1036                 if (card->rtd[i].dai_link->ignore_suspend)
1037                         continue;
1038
1039                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1040                         cpu_dai->driver->suspend(cpu_dai);
1041                 if (platform->driver->suspend && !platform->suspended) {
1042                         platform->driver->suspend(cpu_dai);
1043                         platform->suspended = 1;
1044                 }
1045         }
1046
1047         /* close any waiting streams and save state */
1048         for (i = 0; i < card->num_rtd; i++) {
1049                 run_delayed_work(&card->rtd[i].delayed_work);
1050                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1051         }
1052
1053         for (i = 0; i < card->num_rtd; i++) {
1054                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1055
1056                 if (card->rtd[i].dai_link->ignore_suspend)
1057                         continue;
1058
1059                 if (driver->playback.stream_name != NULL)
1060                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1061                                 SND_SOC_DAPM_STREAM_SUSPEND);
1062
1063                 if (driver->capture.stream_name != NULL)
1064                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1065                                 SND_SOC_DAPM_STREAM_SUSPEND);
1066         }
1067
1068         /* suspend all CODECs */
1069         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1070                 /* If there are paths active then the CODEC will be held with
1071                  * bias _ON and should not be suspended. */
1072                 if (!codec->suspended && codec->driver->suspend) {
1073                         switch (codec->dapm.bias_level) {
1074                         case SND_SOC_BIAS_STANDBY:
1075                         case SND_SOC_BIAS_OFF:
1076                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1077                                 codec->suspended = 1;
1078                                 break;
1079                         default:
1080                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1081                                 break;
1082                         }
1083                 }
1084         }
1085
1086         for (i = 0; i < card->num_rtd; i++) {
1087                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1088
1089                 if (card->rtd[i].dai_link->ignore_suspend)
1090                         continue;
1091
1092                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1093                         cpu_dai->driver->suspend(cpu_dai);
1094         }
1095
1096         if (card->suspend_post)
1097                 card->suspend_post(pdev, PMSG_SUSPEND);
1098
1099         return 0;
1100 }
1101
1102 /* deferred resume work, so resume can complete before we finished
1103  * setting our codec back up, which can be very slow on I2C
1104  */
1105 static void soc_resume_deferred(struct work_struct *work)
1106 {
1107         struct snd_soc_card *card =
1108                         container_of(work, struct snd_soc_card, deferred_resume_work);
1109         struct platform_device *pdev = to_platform_device(card->dev);
1110         struct snd_soc_codec *codec;
1111         int i;
1112
1113         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1114          * so userspace apps are blocked from touching us
1115          */
1116
1117         dev_dbg(card->dev, "starting resume work\n");
1118
1119         /* Bring us up into D2 so that DAPM starts enabling things */
1120         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1121
1122         if (card->resume_pre)
1123                 card->resume_pre(pdev);
1124
1125         /* resume AC97 DAIs */
1126         for (i = 0; i < card->num_rtd; i++) {
1127                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1128
1129                 if (card->rtd[i].dai_link->ignore_suspend)
1130                         continue;
1131
1132                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1133                         cpu_dai->driver->resume(cpu_dai);
1134         }
1135
1136         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1137                 /* If the CODEC was idle over suspend then it will have been
1138                  * left with bias OFF or STANDBY and suspended so we must now
1139                  * resume.  Otherwise the suspend was suppressed.
1140                  */
1141                 if (codec->driver->resume && codec->suspended) {
1142                         switch (codec->dapm.bias_level) {
1143                         case SND_SOC_BIAS_STANDBY:
1144                         case SND_SOC_BIAS_OFF:
1145                                 codec->driver->resume(codec);
1146                                 codec->suspended = 0;
1147                                 break;
1148                         default:
1149                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1150                                 break;
1151                         }
1152                 }
1153         }
1154
1155         for (i = 0; i < card->num_rtd; i++) {
1156                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1157
1158                 if (card->rtd[i].dai_link->ignore_suspend)
1159                         continue;
1160
1161                 if (driver->playback.stream_name != NULL)
1162                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1163                                 SND_SOC_DAPM_STREAM_RESUME);
1164
1165                 if (driver->capture.stream_name != NULL)
1166                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1167                                 SND_SOC_DAPM_STREAM_RESUME);
1168         }
1169
1170         /* unmute any active DACs */
1171         for (i = 0; i < card->num_rtd; i++) {
1172                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1173                 struct snd_soc_dai_driver *drv = dai->driver;
1174
1175                 if (card->rtd[i].dai_link->ignore_suspend)
1176                         continue;
1177
1178                 if (drv->ops->digital_mute && dai->playback_active)
1179                         drv->ops->digital_mute(dai, 0);
1180         }
1181
1182         for (i = 0; i < card->num_rtd; i++) {
1183                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1184                 struct snd_soc_platform *platform = card->rtd[i].platform;
1185
1186                 if (card->rtd[i].dai_link->ignore_suspend)
1187                         continue;
1188
1189                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1190                         cpu_dai->driver->resume(cpu_dai);
1191                 if (platform->driver->resume && platform->suspended) {
1192                         platform->driver->resume(cpu_dai);
1193                         platform->suspended = 0;
1194                 }
1195         }
1196
1197         if (card->resume_post)
1198                 card->resume_post(pdev);
1199
1200         dev_dbg(card->dev, "resume work completed\n");
1201
1202         /* userspace can access us now we are back as we were before */
1203         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1204 }
1205
1206 /* powers up audio subsystem after a suspend */
1207 static int soc_resume(struct device *dev)
1208 {
1209         struct platform_device *pdev = to_platform_device(dev);
1210         struct snd_soc_card *card = platform_get_drvdata(pdev);
1211         int i;
1212
1213         /* AC97 devices might have other drivers hanging off them so
1214          * need to resume immediately.  Other drivers don't have that
1215          * problem and may take a substantial amount of time to resume
1216          * due to I/O costs and anti-pop so handle them out of line.
1217          */
1218         for (i = 0; i < card->num_rtd; i++) {
1219                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1220                 if (cpu_dai->driver->ac97_control) {
1221                         dev_dbg(dev, "Resuming AC97 immediately\n");
1222                         soc_resume_deferred(&card->deferred_resume_work);
1223                 } else {
1224                         dev_dbg(dev, "Scheduling resume work\n");
1225                         if (!schedule_work(&card->deferred_resume_work))
1226                                 dev_err(dev, "resume work item may be lost\n");
1227                 }
1228         }
1229
1230         return 0;
1231 }
1232 #else
1233 #define soc_suspend     NULL
1234 #define soc_resume      NULL
1235 #endif
1236
1237 static struct snd_soc_dai_ops null_dai_ops = {
1238 };
1239
1240 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1241 {
1242         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1243         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1244         struct snd_soc_codec *codec;
1245         struct snd_soc_platform *platform;
1246         struct snd_soc_dai *codec_dai, *cpu_dai;
1247
1248         if (rtd->complete)
1249                 return 1;
1250         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1251
1252         /* do we already have the CPU DAI for this link ? */
1253         if (rtd->cpu_dai) {
1254                 goto find_codec;
1255         }
1256         /* no, then find CPU DAI from registered DAIs*/
1257         list_for_each_entry(cpu_dai, &dai_list, list) {
1258                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1259
1260                         if (!try_module_get(cpu_dai->dev->driver->owner))
1261                                 return -ENODEV;
1262
1263                         rtd->cpu_dai = cpu_dai;
1264                         goto find_codec;
1265                 }
1266         }
1267         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1268                         dai_link->cpu_dai_name);
1269
1270 find_codec:
1271         /* do we already have the CODEC for this link ? */
1272         if (rtd->codec) {
1273                 goto find_platform;
1274         }
1275
1276         /* no, then find CODEC from registered CODECs*/
1277         list_for_each_entry(codec, &codec_list, list) {
1278                 if (!strcmp(codec->name, dai_link->codec_name)) {
1279                         rtd->codec = codec;
1280
1281                         if (!try_module_get(codec->dev->driver->owner))
1282                                 return -ENODEV;
1283
1284                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1285                         list_for_each_entry(codec_dai, &dai_list, list) {
1286                                 if (codec->dev == codec_dai->dev &&
1287                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1288                                         rtd->codec_dai = codec_dai;
1289                                         goto find_platform;
1290                                 }
1291                         }
1292                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1293                                         dai_link->codec_dai_name);
1294
1295                         goto find_platform;
1296                 }
1297         }
1298         dev_dbg(card->dev, "CODEC %s not registered\n",
1299                         dai_link->codec_name);
1300
1301 find_platform:
1302         /* do we already have the CODEC DAI for this link ? */
1303         if (rtd->platform) {
1304                 goto out;
1305         }
1306         /* no, then find CPU DAI from registered DAIs*/
1307         list_for_each_entry(platform, &platform_list, list) {
1308                 if (!strcmp(platform->name, dai_link->platform_name)) {
1309
1310                         if (!try_module_get(platform->dev->driver->owner))
1311                                 return -ENODEV;
1312
1313                         rtd->platform = platform;
1314                         goto out;
1315                 }
1316         }
1317
1318         dev_dbg(card->dev, "platform %s not registered\n",
1319                         dai_link->platform_name);
1320         return 0;
1321
1322 out:
1323         /* mark rtd as complete if we found all 4 of our client devices */
1324         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1325                 rtd->complete = 1;
1326                 card->num_rtd++;
1327         }
1328         return 1;
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_unregister(&rtd->dev);
1343                 rtd->dev_registered = 0;
1344         }
1345
1346         /* remove the CODEC DAI */
1347         if (codec_dai && codec_dai->probed) {
1348                 if (codec_dai->driver->remove) {
1349                         err = codec_dai->driver->remove(codec_dai);
1350                         if (err < 0)
1351                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1352                 }
1353                 codec_dai->probed = 0;
1354                 list_del(&codec_dai->card_list);
1355         }
1356
1357         /* remove the platform */
1358         if (platform && platform->probed) {
1359                 if (platform->driver->remove) {
1360                         err = platform->driver->remove(platform);
1361                         if (err < 0)
1362                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1363                 }
1364                 platform->probed = 0;
1365                 list_del(&platform->card_list);
1366                 module_put(platform->dev->driver->owner);
1367         }
1368
1369         /* remove the CODEC */
1370         if (codec && codec->probed) {
1371                 if (codec->driver->remove) {
1372                         err = codec->driver->remove(codec);
1373                         if (err < 0)
1374                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec->name);
1375                 }
1376
1377                 /* Make sure all DAPM widgets are freed */
1378                 snd_soc_dapm_free(&codec->dapm);
1379
1380                 soc_cleanup_codec_debugfs(codec);
1381                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1382                 codec->probed = 0;
1383                 list_del(&codec->card_list);
1384                 module_put(codec->dev->driver->owner);
1385         }
1386
1387         /* remove the cpu_dai */
1388         if (cpu_dai && cpu_dai->probed) {
1389                 if (cpu_dai->driver->remove) {
1390                         err = cpu_dai->driver->remove(cpu_dai);
1391                         if (err < 0)
1392                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1393                 }
1394                 cpu_dai->probed = 0;
1395                 list_del(&cpu_dai->card_list);
1396                 module_put(cpu_dai->dev->driver->owner);
1397         }
1398 }
1399
1400 static void soc_set_name_prefix(struct snd_soc_card *card,
1401                                 struct snd_soc_codec *codec)
1402 {
1403         int i;
1404
1405         if (card->codec_conf == NULL)
1406                 return;
1407
1408         for (i = 0; i < card->num_configs; i++) {
1409                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1410                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1411                         codec->name_prefix = map->name_prefix;
1412                         break;
1413                 }
1414         }
1415 }
1416
1417 static void rtd_release(struct device *dev) {}
1418
1419 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1420 {
1421         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1422         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1423         struct snd_soc_codec *codec = rtd->codec;
1424         struct snd_soc_platform *platform = rtd->platform;
1425         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1426         const char *temp;
1427         int ret;
1428
1429         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1430
1431         /* config components */
1432         codec_dai->codec = codec;
1433         codec->card = card;
1434         cpu_dai->platform = platform;
1435         rtd->card = card;
1436         rtd->dev.parent = card->dev;
1437         codec_dai->card = card;
1438         cpu_dai->card = card;
1439
1440         /* set default power off timeout */
1441         rtd->pmdown_time = pmdown_time;
1442
1443         /* probe the cpu_dai */
1444         if (!cpu_dai->probed) {
1445                 if (cpu_dai->driver->probe) {
1446                         ret = cpu_dai->driver->probe(cpu_dai);
1447                         if (ret < 0) {
1448                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1449                                                 cpu_dai->name);
1450                                 return ret;
1451                         }
1452                 }
1453                 cpu_dai->probed = 1;
1454                 /* mark cpu_dai as probed and add to card cpu_dai list */
1455                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1456         }
1457
1458         /* probe the CODEC */
1459         if (!codec->probed) {
1460                 codec->dapm.card = card;
1461                 soc_set_name_prefix(card, codec);
1462                 if (codec->driver->probe) {
1463                         ret = codec->driver->probe(codec);
1464                         if (ret < 0) {
1465                                 printk(KERN_ERR "asoc: failed to probe CODEC %s\n",
1466                                                 codec->name);
1467                                 return ret;
1468                         }
1469                 }
1470
1471                 soc_init_codec_debugfs(codec);
1472
1473                 /* mark codec as probed and add to card codec list */
1474                 codec->probed = 1;
1475                 list_add(&codec->card_list, &card->codec_dev_list);
1476         }
1477
1478         /* probe the platform */
1479         if (!platform->probed) {
1480                 if (platform->driver->probe) {
1481                         ret = platform->driver->probe(platform);
1482                         if (ret < 0) {
1483                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1484                                                 platform->name);
1485                                 return ret;
1486                         }
1487                 }
1488                 /* mark platform as probed and add to card platform list */
1489                 platform->probed = 1;
1490                 list_add(&platform->card_list, &card->platform_dev_list);
1491         }
1492
1493         /* probe the CODEC DAI */
1494         if (!codec_dai->probed) {
1495                 if (codec_dai->driver->probe) {
1496                         ret = codec_dai->driver->probe(codec_dai);
1497                         if (ret < 0) {
1498                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1499                                                 codec_dai->name);
1500                                 return ret;
1501                         }
1502                 }
1503
1504                 /* mark cpu_dai as probed and add to card cpu_dai list */
1505                 codec_dai->probed = 1;
1506                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1507         }
1508
1509         /* DAPM dai link stream work */
1510         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1511
1512         /* now that all clients have probed, initialise the DAI link */
1513         if (dai_link->init) {
1514                 /* machine controls, routes and widgets are not prefixed */
1515                 temp = rtd->codec->name_prefix;
1516                 rtd->codec->name_prefix = NULL;
1517                 ret = dai_link->init(rtd);
1518                 if (ret < 0) {
1519                         printk(KERN_ERR "asoc: failed to init %s\n", dai_link->stream_name);
1520                         return ret;
1521                 }
1522                 rtd->codec->name_prefix = temp;
1523         }
1524
1525         /* Make sure all DAPM widgets are instantiated */
1526         snd_soc_dapm_new_widgets(&codec->dapm);
1527         snd_soc_dapm_sync(&codec->dapm);
1528
1529         /* register the rtd device */
1530         rtd->dev.release = rtd_release;
1531         rtd->dev.init_name = dai_link->name;
1532         ret = device_register(&rtd->dev);
1533         if (ret < 0) {
1534                 printk(KERN_ERR "asoc: failed to register DAI runtime device %d\n", ret);
1535                 return ret;
1536         }
1537
1538         rtd->dev_registered = 1;
1539         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1540         if (ret < 0)
1541                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1542
1543         /* add DAPM sysfs entries for this codec */
1544         ret = snd_soc_dapm_sys_add(&rtd->dev);
1545         if (ret < 0)
1546                 printk(KERN_WARNING "asoc: failed to add codec dapm sysfs entries\n");
1547
1548         /* add codec sysfs entries */
1549         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1550         if (ret < 0)
1551                 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1552
1553         /* create the pcm */
1554         ret = soc_new_pcm(rtd, num);
1555         if (ret < 0) {
1556                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1557                 return ret;
1558         }
1559
1560         /* add platform data for AC97 devices */
1561         if (rtd->codec_dai->driver->ac97_control)
1562                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1563
1564         return 0;
1565 }
1566
1567 #ifdef CONFIG_SND_SOC_AC97_BUS
1568 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1569 {
1570         int ret;
1571
1572         /* Only instantiate AC97 if not already done by the adaptor
1573          * for the generic AC97 subsystem.
1574          */
1575         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1576                 /*
1577                  * It is possible that the AC97 device is already registered to
1578                  * the device subsystem. This happens when the device is created
1579                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1580                  * is the generic AC97 glue but others migh emerge.
1581                  *
1582                  * In those cases we don't try to register the device again.
1583                  */
1584                 if (!rtd->codec->ac97_created)
1585                         return 0;
1586
1587                 ret = soc_ac97_dev_register(rtd->codec);
1588                 if (ret < 0) {
1589                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1590                         return ret;
1591                 }
1592
1593                 rtd->codec->ac97_registered = 1;
1594         }
1595         return 0;
1596 }
1597
1598 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1599 {
1600         if (codec->ac97_registered) {
1601                 soc_ac97_dev_unregister(codec);
1602                 codec->ac97_registered = 0;
1603         }
1604 }
1605 #endif
1606
1607 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1608 {
1609         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1610         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1611         struct snd_soc_codec *codec;
1612         const char *temp;
1613         int ret = -ENODEV;
1614
1615         /* find CODEC from registered CODECs*/
1616         list_for_each_entry(codec, &codec_list, list) {
1617                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1618                         if (codec->probed) {
1619                                 dev_err(codec->dev,
1620                                         "asoc: codec already probed");
1621                                 ret = -EBUSY;
1622                                 goto out;
1623                         }
1624                         goto found;
1625                 }
1626         }
1627         /* codec not found */
1628         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1629         goto out;
1630
1631 found:
1632         if (!try_module_get(codec->dev->driver->owner))
1633                 return -ENODEV;
1634
1635         codec->card = card;
1636         codec->dapm.card = card;
1637
1638         soc_set_name_prefix(card, codec);
1639         if (codec->driver->probe) {
1640                 ret = codec->driver->probe(codec);
1641                 if (ret < 0) {
1642                         dev_err(codec->dev, "asoc: failed to probe CODEC");
1643                         return ret;
1644                 }
1645         }
1646
1647         soc_init_codec_debugfs(codec);
1648
1649         /* mark codec as probed and add to card codec list */
1650         codec->probed = 1;
1651         list_add(&codec->card_list, &card->codec_dev_list);
1652
1653         /* now that all clients have probed, initialise the DAI link */
1654         if (aux_dev->init) {
1655                 /* machine controls, routes and widgets are not prefixed */
1656                 temp = codec->name_prefix;
1657                 codec->name_prefix = NULL;
1658                 ret = aux_dev->init(&codec->dapm);
1659                 if (ret < 0) {
1660                         dev_err(codec->dev,
1661                                 "asoc: failed to init %s\n", aux_dev->name);
1662                         return ret;
1663                 }
1664                 codec->name_prefix = temp;
1665         }
1666
1667         /* Make sure all DAPM widgets are instantiated */
1668         snd_soc_dapm_new_widgets(&codec->dapm);
1669         snd_soc_dapm_sync(&codec->dapm);
1670
1671         /* register the rtd device */
1672         rtd->codec = codec;
1673         rtd->card = card;
1674         rtd->dev.parent = card->dev;
1675         rtd->dev.release = rtd_release;
1676         rtd->dev.init_name = aux_dev->name;
1677         ret = device_register(&rtd->dev);
1678         if (ret < 0) {
1679                 dev_err(codec->dev,
1680                         "asoc: failed to register aux runtime device %d\n",
1681                         ret);
1682                 return ret;
1683         }
1684         rtd->dev_registered = 1;
1685
1686         /* add DAPM sysfs entries for this codec */
1687         ret = snd_soc_dapm_sys_add(&rtd->dev);
1688         if (ret < 0)
1689                 dev_err(codec->dev,
1690                         "asoc: failed to add codec dapm sysfs entries\n");
1691
1692         /* add codec sysfs entries */
1693         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1694         if (ret < 0)
1695                 dev_err(codec->dev, "asoc: failed to add codec sysfs files\n");
1696
1697 out:
1698         return ret;
1699 }
1700
1701 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1702 {
1703         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1704         struct snd_soc_codec *codec = rtd->codec;
1705         int err;
1706
1707         /* unregister the rtd device */
1708         if (rtd->dev_registered) {
1709                 device_unregister(&rtd->dev);
1710                 rtd->dev_registered = 0;
1711         }
1712
1713         /* remove the CODEC */
1714         if (codec && codec->probed) {
1715                 if (codec->driver->remove) {
1716                         err = codec->driver->remove(codec);
1717                         if (err < 0)
1718                                 dev_err(codec->dev,
1719                                         "asoc: failed to remove %s\n",
1720                                         codec->name);
1721                 }
1722
1723                 /* Make sure all DAPM widgets are freed */
1724                 snd_soc_dapm_free(&codec->dapm);
1725
1726                 soc_cleanup_codec_debugfs(codec);
1727                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1728                 codec->probed = 0;
1729                 list_del(&codec->card_list);
1730                 module_put(codec->dev->driver->owner);
1731         }
1732 }
1733
1734 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1735                                     enum snd_soc_compress_type compress_type)
1736 {
1737         int ret;
1738
1739         if (codec->cache_init)
1740                 return 0;
1741
1742         /* override the compress_type if necessary */
1743         if (compress_type && codec->compress_type != compress_type)
1744                 codec->compress_type = compress_type;
1745         ret = snd_soc_cache_init(codec);
1746         if (ret < 0) {
1747                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1748                         ret);
1749                 return ret;
1750         }
1751         codec->cache_init = 1;
1752         return 0;
1753 }
1754
1755 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1756 {
1757         struct platform_device *pdev = to_platform_device(card->dev);
1758         struct snd_soc_codec *codec;
1759         struct snd_soc_codec_conf *codec_conf;
1760         enum snd_soc_compress_type compress_type;
1761         int ret, i;
1762
1763         mutex_lock(&card->mutex);
1764
1765         if (card->instantiated) {
1766                 mutex_unlock(&card->mutex);
1767                 return;
1768         }
1769
1770         /* bind DAIs */
1771         for (i = 0; i < card->num_links; i++)
1772                 soc_bind_dai_link(card, i);
1773
1774         /* bind completed ? */
1775         if (card->num_rtd != card->num_links) {
1776                 mutex_unlock(&card->mutex);
1777                 return;
1778         }
1779
1780         /* initialize the register cache for each available codec */
1781         list_for_each_entry(codec, &codec_list, list) {
1782                 if (codec->cache_init)
1783                         continue;
1784                 /* check to see if we need to override the compress_type */
1785                 for (i = 0; i < card->num_configs; ++i) {
1786                         codec_conf = &card->codec_conf[i];
1787                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1788                                 compress_type = codec_conf->compress_type;
1789                                 if (compress_type && compress_type
1790                                     != codec->compress_type)
1791                                         break;
1792                         }
1793                 }
1794                 if (i == card->num_configs) {
1795                         /* no need to override the compress_type so
1796                          * go ahead and do the standard thing */
1797                         ret = snd_soc_init_codec_cache(codec, 0);
1798                         if (ret < 0) {
1799                                 mutex_unlock(&card->mutex);
1800                                 return;
1801                         }
1802                         continue;
1803                 }
1804                 /* override the compress_type with the one supplied in
1805                  * the machine driver */
1806                 ret = snd_soc_init_codec_cache(codec, compress_type);
1807                 if (ret < 0) {
1808                         mutex_unlock(&card->mutex);
1809                         return;
1810                 }
1811         }
1812
1813         /* card bind complete so register a sound card */
1814         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1815                         card->owner, 0, &card->snd_card);
1816         if (ret < 0) {
1817                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1818                         card->name);
1819                 mutex_unlock(&card->mutex);
1820                 return;
1821         }
1822         card->snd_card->dev = card->dev;
1823
1824 #ifdef CONFIG_PM
1825         /* deferred resume work */
1826         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1827 #endif
1828
1829         /* initialise the sound card only once */
1830         if (card->probe) {
1831                 ret = card->probe(pdev);
1832                 if (ret < 0)
1833                         goto card_probe_error;
1834         }
1835
1836         for (i = 0; i < card->num_links; i++) {
1837                 ret = soc_probe_dai_link(card, i);
1838                 if (ret < 0) {
1839                         pr_err("asoc: failed to instantiate card %s: %d\n",
1840                                card->name, ret);
1841                         goto probe_dai_err;
1842                 }
1843         }
1844
1845         for (i = 0; i < card->num_aux_devs; i++) {
1846                 ret = soc_probe_aux_dev(card, i);
1847                 if (ret < 0) {
1848                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1849                                card->name, ret);
1850                         goto probe_aux_dev_err;
1851                 }
1852         }
1853
1854         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1855                  "%s",  card->name);
1856         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1857                  "%s", card->name);
1858
1859         ret = snd_card_register(card->snd_card);
1860         if (ret < 0) {
1861                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1862                 goto probe_dai_err;
1863         }
1864
1865 #ifdef CONFIG_SND_SOC_AC97_BUS
1866         /* register any AC97 codecs */
1867         for (i = 0; i < card->num_rtd; i++) {
1868                         ret = soc_register_ac97_dai_link(&card->rtd[i]);
1869                         if (ret < 0) {
1870                                 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1871                                 goto probe_dai_err;
1872                         }
1873                 }
1874 #endif
1875
1876         card->instantiated = 1;
1877         mutex_unlock(&card->mutex);
1878         return;
1879
1880 probe_aux_dev_err:
1881         for (i = 0; i < card->num_aux_devs; i++)
1882                 soc_remove_aux_dev(card, i);
1883
1884 probe_dai_err:
1885         for (i = 0; i < card->num_links; i++)
1886                 soc_remove_dai_link(card, i);
1887
1888 card_probe_error:
1889         if (card->remove)
1890                 card->remove(pdev);
1891
1892         snd_card_free(card->snd_card);
1893
1894         mutex_unlock(&card->mutex);
1895 }
1896
1897 /*
1898  * Attempt to initialise any uninitialised cards.  Must be called with
1899  * client_mutex.
1900  */
1901 static void snd_soc_instantiate_cards(void)
1902 {
1903         struct snd_soc_card *card;
1904         list_for_each_entry(card, &card_list, list)
1905                 snd_soc_instantiate_card(card);
1906 }
1907
1908 /* probes a new socdev */
1909 static int soc_probe(struct platform_device *pdev)
1910 {
1911         struct snd_soc_card *card = platform_get_drvdata(pdev);
1912         int ret = 0;
1913
1914         /* Bodge while we unpick instantiation */
1915         card->dev = &pdev->dev;
1916         INIT_LIST_HEAD(&card->dai_dev_list);
1917         INIT_LIST_HEAD(&card->codec_dev_list);
1918         INIT_LIST_HEAD(&card->platform_dev_list);
1919
1920         soc_init_card_debugfs(card);
1921
1922         ret = snd_soc_register_card(card);
1923         if (ret != 0) {
1924                 dev_err(&pdev->dev, "Failed to register card\n");
1925                 return ret;
1926         }
1927
1928         return 0;
1929 }
1930
1931 /* removes a socdev */
1932 static int soc_remove(struct platform_device *pdev)
1933 {
1934         struct snd_soc_card *card = platform_get_drvdata(pdev);
1935         int i;
1936
1937                 if (card->instantiated) {
1938
1939                 /* make sure any delayed work runs */
1940                 for (i = 0; i < card->num_rtd; i++) {
1941                         struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1942                         run_delayed_work(&rtd->delayed_work);
1943                 }
1944
1945                 /* remove auxiliary devices */
1946                 for (i = 0; i < card->num_aux_devs; i++)
1947                         soc_remove_aux_dev(card, i);
1948
1949                 /* remove and free each DAI */
1950                 for (i = 0; i < card->num_rtd; i++)
1951                         soc_remove_dai_link(card, i);
1952
1953                 soc_cleanup_card_debugfs(card);
1954
1955                 /* remove the card */
1956                 if (card->remove)
1957                         card->remove(pdev);
1958
1959                 kfree(card->rtd);
1960                 snd_card_free(card->snd_card);
1961         }
1962         snd_soc_unregister_card(card);
1963         return 0;
1964 }
1965
1966 static int soc_poweroff(struct device *dev)
1967 {
1968         struct platform_device *pdev = to_platform_device(dev);
1969         struct snd_soc_card *card = platform_get_drvdata(pdev);
1970         int i;
1971
1972         if (!card->instantiated)
1973                 return 0;
1974
1975         /* Flush out pmdown_time work - we actually do want to run it
1976          * now, we're shutting down so no imminent restart. */
1977         for (i = 0; i < card->num_rtd; i++) {
1978                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1979                 run_delayed_work(&rtd->delayed_work);
1980         }
1981
1982         snd_soc_dapm_shutdown(card);
1983
1984         return 0;
1985 }
1986
1987 static const struct dev_pm_ops soc_pm_ops = {
1988         .suspend = soc_suspend,
1989         .resume = soc_resume,
1990         .poweroff = soc_poweroff,
1991 };
1992
1993 /* ASoC platform driver */
1994 static struct platform_driver soc_driver = {
1995         .driver         = {
1996                 .name           = "soc-audio",
1997                 .owner          = THIS_MODULE,
1998                 .pm             = &soc_pm_ops,
1999         },
2000         .probe          = soc_probe,
2001         .remove         = soc_remove,
2002 };
2003
2004 /* create a new pcm */
2005 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2006 {
2007         struct snd_soc_codec *codec = rtd->codec;
2008         struct snd_soc_platform *platform = rtd->platform;
2009         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2010         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2011         struct snd_pcm *pcm;
2012         char new_name[64];
2013         int ret = 0, playback = 0, capture = 0;
2014
2015         /* check client and interface hw capabilities */
2016         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2017                         rtd->dai_link->stream_name, codec_dai->name, num);
2018
2019         if (codec_dai->driver->playback.channels_min)
2020                 playback = 1;
2021         if (codec_dai->driver->capture.channels_min)
2022                 capture = 1;
2023
2024         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2025         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2026                         num, playback, capture, &pcm);
2027         if (ret < 0) {
2028                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2029                 return ret;
2030         }
2031
2032         rtd->pcm = pcm;
2033         pcm->private_data = rtd;
2034         soc_pcm_ops.mmap = platform->driver->ops->mmap;
2035         soc_pcm_ops.pointer = platform->driver->ops->pointer;
2036         soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2037         soc_pcm_ops.copy = platform->driver->ops->copy;
2038         soc_pcm_ops.silence = platform->driver->ops->silence;
2039         soc_pcm_ops.ack = platform->driver->ops->ack;
2040         soc_pcm_ops.page = platform->driver->ops->page;
2041
2042         if (playback)
2043                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2044
2045         if (capture)
2046                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2047
2048         ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2049         if (ret < 0) {
2050                 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2051                 return ret;
2052         }
2053
2054         pcm->private_free = platform->driver->pcm_free;
2055         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2056                 cpu_dai->name);
2057         return ret;
2058 }
2059
2060 /**
2061  * snd_soc_codec_volatile_register: Report if a register is volatile.
2062  *
2063  * @codec: CODEC to query.
2064  * @reg: Register to query.
2065  *
2066  * Boolean function indiciating if a CODEC register is volatile.
2067  */
2068 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
2069 {
2070         if (codec->driver->volatile_register)
2071                 return codec->driver->volatile_register(reg);
2072         else
2073                 return 0;
2074 }
2075 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2076
2077 /**
2078  * snd_soc_new_ac97_codec - initailise AC97 device
2079  * @codec: audio codec
2080  * @ops: AC97 bus operations
2081  * @num: AC97 codec number
2082  *
2083  * Initialises AC97 codec resources for use by ad-hoc devices only.
2084  */
2085 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2086         struct snd_ac97_bus_ops *ops, int num)
2087 {
2088         mutex_lock(&codec->mutex);
2089
2090         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2091         if (codec->ac97 == NULL) {
2092                 mutex_unlock(&codec->mutex);
2093                 return -ENOMEM;
2094         }
2095
2096         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2097         if (codec->ac97->bus == NULL) {
2098                 kfree(codec->ac97);
2099                 codec->ac97 = NULL;
2100                 mutex_unlock(&codec->mutex);
2101                 return -ENOMEM;
2102         }
2103
2104         codec->ac97->bus->ops = ops;
2105         codec->ac97->num = num;
2106
2107         /*
2108          * Mark the AC97 device to be created by us. This way we ensure that the
2109          * device will be registered with the device subsystem later on.
2110          */
2111         codec->ac97_created = 1;
2112
2113         mutex_unlock(&codec->mutex);
2114         return 0;
2115 }
2116 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2117
2118 /**
2119  * snd_soc_free_ac97_codec - free AC97 codec device
2120  * @codec: audio codec
2121  *
2122  * Frees AC97 codec device resources.
2123  */
2124 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2125 {
2126         mutex_lock(&codec->mutex);
2127 #ifdef CONFIG_SND_SOC_AC97_BUS
2128         soc_unregister_ac97_dai_link(codec);
2129 #endif
2130         kfree(codec->ac97->bus);
2131         kfree(codec->ac97);
2132         codec->ac97 = NULL;
2133         codec->ac97_created = 0;
2134         mutex_unlock(&codec->mutex);
2135 }
2136 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2137
2138 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2139 {
2140         unsigned int ret;
2141
2142         ret = codec->read(codec, reg);
2143         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2144         trace_snd_soc_reg_read(codec, reg, ret);
2145
2146         return ret;
2147 }
2148 EXPORT_SYMBOL_GPL(snd_soc_read);
2149
2150 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2151                            unsigned int reg, unsigned int val)
2152 {
2153         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2154         trace_snd_soc_reg_write(codec, reg, val);
2155         return codec->write(codec, reg, val);
2156 }
2157 EXPORT_SYMBOL_GPL(snd_soc_write);
2158
2159 /**
2160  * snd_soc_update_bits - update codec register bits
2161  * @codec: audio codec
2162  * @reg: codec register
2163  * @mask: register mask
2164  * @value: new value
2165  *
2166  * Writes new register value.
2167  *
2168  * Returns 1 for change else 0.
2169  */
2170 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2171                                 unsigned int mask, unsigned int value)
2172 {
2173         int change;
2174         unsigned int old, new;
2175
2176         old = snd_soc_read(codec, reg);
2177         new = (old & ~mask) | value;
2178         change = old != new;
2179         if (change)
2180                 snd_soc_write(codec, reg, new);
2181
2182         return change;
2183 }
2184 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2185
2186 /**
2187  * snd_soc_update_bits_locked - update codec register bits
2188  * @codec: audio codec
2189  * @reg: codec register
2190  * @mask: register mask
2191  * @value: new value
2192  *
2193  * Writes new register value, and takes the codec mutex.
2194  *
2195  * Returns 1 for change else 0.
2196  */
2197 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2198                                unsigned short reg, unsigned int mask,
2199                                unsigned int value)
2200 {
2201         int change;
2202
2203         mutex_lock(&codec->mutex);
2204         change = snd_soc_update_bits(codec, reg, mask, value);
2205         mutex_unlock(&codec->mutex);
2206
2207         return change;
2208 }
2209 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2210
2211 /**
2212  * snd_soc_test_bits - test register for change
2213  * @codec: audio codec
2214  * @reg: codec register
2215  * @mask: register mask
2216  * @value: new value
2217  *
2218  * Tests a register with a new value and checks if the new value is
2219  * different from the old value.
2220  *
2221  * Returns 1 for change else 0.
2222  */
2223 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2224                                 unsigned int mask, unsigned int value)
2225 {
2226         int change;
2227         unsigned int old, new;
2228
2229         old = snd_soc_read(codec, reg);
2230         new = (old & ~mask) | value;
2231         change = old != new;
2232
2233         return change;
2234 }
2235 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2236
2237 /**
2238  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2239  * @substream: the pcm substream
2240  * @hw: the hardware parameters
2241  *
2242  * Sets the substream runtime hardware parameters.
2243  */
2244 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2245         const struct snd_pcm_hardware *hw)
2246 {
2247         struct snd_pcm_runtime *runtime = substream->runtime;
2248         runtime->hw.info = hw->info;
2249         runtime->hw.formats = hw->formats;
2250         runtime->hw.period_bytes_min = hw->period_bytes_min;
2251         runtime->hw.period_bytes_max = hw->period_bytes_max;
2252         runtime->hw.periods_min = hw->periods_min;
2253         runtime->hw.periods_max = hw->periods_max;
2254         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2255         runtime->hw.fifo_size = hw->fifo_size;
2256         return 0;
2257 }
2258 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2259
2260 /**
2261  * snd_soc_cnew - create new control
2262  * @_template: control template
2263  * @data: control private data
2264  * @long_name: control long name
2265  *
2266  * Create a new mixer control from a template control.
2267  *
2268  * Returns 0 for success, else error.
2269  */
2270 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2271         void *data, char *long_name)
2272 {
2273         struct snd_kcontrol_new template;
2274
2275         memcpy(&template, _template, sizeof(template));
2276         if (long_name)
2277                 template.name = long_name;
2278         template.index = 0;
2279
2280         return snd_ctl_new1(&template, data);
2281 }
2282 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2283
2284 /**
2285  * snd_soc_add_controls - add an array of controls to a codec.
2286  * Convienience function to add a list of controls. Many codecs were
2287  * duplicating this code.
2288  *
2289  * @codec: codec to add controls to
2290  * @controls: array of controls to add
2291  * @num_controls: number of elements in the array
2292  *
2293  * Return 0 for success, else error.
2294  */
2295 int snd_soc_add_controls(struct snd_soc_codec *codec,
2296         const struct snd_kcontrol_new *controls, int num_controls)
2297 {
2298         struct snd_card *card = codec->card->snd_card;
2299         char prefixed_name[44], *name;
2300         int err, i;
2301
2302         for (i = 0; i < num_controls; i++) {
2303                 const struct snd_kcontrol_new *control = &controls[i];
2304                 if (codec->name_prefix) {
2305                         snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
2306                                  codec->name_prefix, control->name);
2307                         name = prefixed_name;
2308                 } else {
2309                         name = control->name;
2310                 }
2311                 err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
2312                 if (err < 0) {
2313                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2314                                 codec->name, name, err);
2315                         return err;
2316                 }
2317         }
2318
2319         return 0;
2320 }
2321 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2322
2323 /**
2324  * snd_soc_info_enum_double - enumerated double mixer info callback
2325  * @kcontrol: mixer control
2326  * @uinfo: control element information
2327  *
2328  * Callback to provide information about a double enumerated
2329  * mixer control.
2330  *
2331  * Returns 0 for success.
2332  */
2333 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2334         struct snd_ctl_elem_info *uinfo)
2335 {
2336         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2337
2338         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2339         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2340         uinfo->value.enumerated.items = e->max;
2341
2342         if (uinfo->value.enumerated.item > e->max - 1)
2343                 uinfo->value.enumerated.item = e->max - 1;
2344         strcpy(uinfo->value.enumerated.name,
2345                 e->texts[uinfo->value.enumerated.item]);
2346         return 0;
2347 }
2348 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2349
2350 /**
2351  * snd_soc_get_enum_double - enumerated double mixer get callback
2352  * @kcontrol: mixer control
2353  * @ucontrol: control element information
2354  *
2355  * Callback to get the value of a double enumerated mixer.
2356  *
2357  * Returns 0 for success.
2358  */
2359 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2360         struct snd_ctl_elem_value *ucontrol)
2361 {
2362         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2363         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2364         unsigned int val, bitmask;
2365
2366         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2367                 ;
2368         val = snd_soc_read(codec, e->reg);
2369         ucontrol->value.enumerated.item[0]
2370                 = (val >> e->shift_l) & (bitmask - 1);
2371         if (e->shift_l != e->shift_r)
2372                 ucontrol->value.enumerated.item[1] =
2373                         (val >> e->shift_r) & (bitmask - 1);
2374
2375         return 0;
2376 }
2377 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2378
2379 /**
2380  * snd_soc_put_enum_double - enumerated double mixer put callback
2381  * @kcontrol: mixer control
2382  * @ucontrol: control element information
2383  *
2384  * Callback to set the value of a double enumerated mixer.
2385  *
2386  * Returns 0 for success.
2387  */
2388 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2389         struct snd_ctl_elem_value *ucontrol)
2390 {
2391         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2392         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2393         unsigned int val;
2394         unsigned int mask, bitmask;
2395
2396         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2397                 ;
2398         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2399                 return -EINVAL;
2400         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2401         mask = (bitmask - 1) << e->shift_l;
2402         if (e->shift_l != e->shift_r) {
2403                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2404                         return -EINVAL;
2405                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2406                 mask |= (bitmask - 1) << e->shift_r;
2407         }
2408
2409         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2410 }
2411 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2412
2413 /**
2414  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2415  * @kcontrol: mixer control
2416  * @ucontrol: control element information
2417  *
2418  * Callback to get the value of a double semi enumerated mixer.
2419  *
2420  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2421  * used for handling bitfield coded enumeration for example.
2422  *
2423  * Returns 0 for success.
2424  */
2425 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2426         struct snd_ctl_elem_value *ucontrol)
2427 {
2428         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2429         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2430         unsigned int reg_val, val, mux;
2431
2432         reg_val = snd_soc_read(codec, e->reg);
2433         val = (reg_val >> e->shift_l) & e->mask;
2434         for (mux = 0; mux < e->max; mux++) {
2435                 if (val == e->values[mux])
2436                         break;
2437         }
2438         ucontrol->value.enumerated.item[0] = mux;
2439         if (e->shift_l != e->shift_r) {
2440                 val = (reg_val >> e->shift_r) & e->mask;
2441                 for (mux = 0; mux < e->max; mux++) {
2442                         if (val == e->values[mux])
2443                                 break;
2444                 }
2445                 ucontrol->value.enumerated.item[1] = mux;
2446         }
2447
2448         return 0;
2449 }
2450 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2451
2452 /**
2453  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2454  * @kcontrol: mixer control
2455  * @ucontrol: control element information
2456  *
2457  * Callback to set the value of a double semi enumerated mixer.
2458  *
2459  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2460  * used for handling bitfield coded enumeration for example.
2461  *
2462  * Returns 0 for success.
2463  */
2464 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2465         struct snd_ctl_elem_value *ucontrol)
2466 {
2467         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2468         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2469         unsigned int val;
2470         unsigned int mask;
2471
2472         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2473                 return -EINVAL;
2474         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2475         mask = e->mask << e->shift_l;
2476         if (e->shift_l != e->shift_r) {
2477                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2478                         return -EINVAL;
2479                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2480                 mask |= e->mask << e->shift_r;
2481         }
2482
2483         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2484 }
2485 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2486
2487 /**
2488  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2489  * @kcontrol: mixer control
2490  * @uinfo: control element information
2491  *
2492  * Callback to provide information about an external enumerated
2493  * single mixer.
2494  *
2495  * Returns 0 for success.
2496  */
2497 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2498         struct snd_ctl_elem_info *uinfo)
2499 {
2500         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2501
2502         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2503         uinfo->count = 1;
2504         uinfo->value.enumerated.items = e->max;
2505
2506         if (uinfo->value.enumerated.item > e->max - 1)
2507                 uinfo->value.enumerated.item = e->max - 1;
2508         strcpy(uinfo->value.enumerated.name,
2509                 e->texts[uinfo->value.enumerated.item]);
2510         return 0;
2511 }
2512 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2513
2514 /**
2515  * snd_soc_info_volsw_ext - external single mixer info callback
2516  * @kcontrol: mixer control
2517  * @uinfo: control element information
2518  *
2519  * Callback to provide information about a single external mixer control.
2520  *
2521  * Returns 0 for success.
2522  */
2523 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2524         struct snd_ctl_elem_info *uinfo)
2525 {
2526         int max = kcontrol->private_value;
2527
2528         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2529                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2530         else
2531                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2532
2533         uinfo->count = 1;
2534         uinfo->value.integer.min = 0;
2535         uinfo->value.integer.max = max;
2536         return 0;
2537 }
2538 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2539
2540 /**
2541  * snd_soc_info_volsw - single mixer info callback
2542  * @kcontrol: mixer control
2543  * @uinfo: control element information
2544  *
2545  * Callback to provide information about a single mixer control.
2546  *
2547  * Returns 0 for success.
2548  */
2549 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2550         struct snd_ctl_elem_info *uinfo)
2551 {
2552         struct soc_mixer_control *mc =
2553                 (struct soc_mixer_control *)kcontrol->private_value;
2554         int platform_max;
2555         unsigned int shift = mc->shift;
2556         unsigned int rshift = mc->rshift;
2557
2558         if (!mc->platform_max)
2559                 mc->platform_max = mc->max;
2560         platform_max = mc->platform_max;
2561
2562         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2563                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2564         else
2565                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2566
2567         uinfo->count = shift == rshift ? 1 : 2;
2568         uinfo->value.integer.min = 0;
2569         uinfo->value.integer.max = platform_max;
2570         return 0;
2571 }
2572 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2573
2574 /**
2575  * snd_soc_get_volsw - single mixer get callback
2576  * @kcontrol: mixer control
2577  * @ucontrol: control element information
2578  *
2579  * Callback to get the value of a single mixer control.
2580  *
2581  * Returns 0 for success.
2582  */
2583 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2584         struct snd_ctl_elem_value *ucontrol)
2585 {
2586         struct soc_mixer_control *mc =
2587                 (struct soc_mixer_control *)kcontrol->private_value;
2588         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2589         unsigned int reg = mc->reg;
2590         unsigned int shift = mc->shift;
2591         unsigned int rshift = mc->rshift;
2592         int max = mc->max;
2593         unsigned int mask = (1 << fls(max)) - 1;
2594         unsigned int invert = mc->invert;
2595
2596         ucontrol->value.integer.value[0] =
2597                 (snd_soc_read(codec, reg) >> shift) & mask;
2598         if (shift != rshift)
2599                 ucontrol->value.integer.value[1] =
2600                         (snd_soc_read(codec, reg) >> rshift) & mask;
2601         if (invert) {
2602                 ucontrol->value.integer.value[0] =
2603                         max - ucontrol->value.integer.value[0];
2604                 if (shift != rshift)
2605                         ucontrol->value.integer.value[1] =
2606                                 max - ucontrol->value.integer.value[1];
2607         }
2608
2609         return 0;
2610 }
2611 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2612
2613 /**
2614  * snd_soc_put_volsw - single mixer put callback
2615  * @kcontrol: mixer control
2616  * @ucontrol: control element information
2617  *
2618  * Callback to set the value of a single mixer control.
2619  *
2620  * Returns 0 for success.
2621  */
2622 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2623         struct snd_ctl_elem_value *ucontrol)
2624 {
2625         struct soc_mixer_control *mc =
2626                 (struct soc_mixer_control *)kcontrol->private_value;
2627         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2628         unsigned int reg = mc->reg;
2629         unsigned int shift = mc->shift;
2630         unsigned int rshift = mc->rshift;
2631         int max = mc->max;
2632         unsigned int mask = (1 << fls(max)) - 1;
2633         unsigned int invert = mc->invert;
2634         unsigned int val, val2, val_mask;
2635
2636         val = (ucontrol->value.integer.value[0] & mask);
2637         if (invert)
2638                 val = max - val;
2639         val_mask = mask << shift;
2640         val = val << shift;
2641         if (shift != rshift) {
2642                 val2 = (ucontrol->value.integer.value[1] & mask);
2643                 if (invert)
2644                         val2 = max - val2;
2645                 val_mask |= mask << rshift;
2646                 val |= val2 << rshift;
2647         }
2648         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2649 }
2650 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2651
2652 /**
2653  * snd_soc_info_volsw_2r - double mixer info callback
2654  * @kcontrol: mixer control
2655  * @uinfo: control element information
2656  *
2657  * Callback to provide information about a double mixer control that
2658  * spans 2 codec registers.
2659  *
2660  * Returns 0 for success.
2661  */
2662 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2663         struct snd_ctl_elem_info *uinfo)
2664 {
2665         struct soc_mixer_control *mc =
2666                 (struct soc_mixer_control *)kcontrol->private_value;
2667         int platform_max;
2668
2669         if (!mc->platform_max)
2670                 mc->platform_max = mc->max;
2671         platform_max = mc->platform_max;
2672
2673         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2674                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2675         else
2676                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2677
2678         uinfo->count = 2;
2679         uinfo->value.integer.min = 0;
2680         uinfo->value.integer.max = platform_max;
2681         return 0;
2682 }
2683 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2684
2685 /**
2686  * snd_soc_get_volsw_2r - double mixer get callback
2687  * @kcontrol: mixer control
2688  * @ucontrol: control element information
2689  *
2690  * Callback to get the value of a double mixer control that spans 2 registers.
2691  *
2692  * Returns 0 for success.
2693  */
2694 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2695         struct snd_ctl_elem_value *ucontrol)
2696 {
2697         struct soc_mixer_control *mc =
2698                 (struct soc_mixer_control *)kcontrol->private_value;
2699         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2700         unsigned int reg = mc->reg;
2701         unsigned int reg2 = mc->rreg;
2702         unsigned int shift = mc->shift;
2703         int max = mc->max;
2704         unsigned int mask = (1 << fls(max)) - 1;
2705         unsigned int invert = mc->invert;
2706
2707         ucontrol->value.integer.value[0] =
2708                 (snd_soc_read(codec, reg) >> shift) & mask;
2709         ucontrol->value.integer.value[1] =
2710                 (snd_soc_read(codec, reg2) >> shift) & mask;
2711         if (invert) {
2712                 ucontrol->value.integer.value[0] =
2713                         max - ucontrol->value.integer.value[0];
2714                 ucontrol->value.integer.value[1] =
2715                         max - ucontrol->value.integer.value[1];
2716         }
2717
2718         return 0;
2719 }
2720 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2721
2722 /**
2723  * snd_soc_put_volsw_2r - double mixer set callback
2724  * @kcontrol: mixer control
2725  * @ucontrol: control element information
2726  *
2727  * Callback to set the value of a double mixer control that spans 2 registers.
2728  *
2729  * Returns 0 for success.
2730  */
2731 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2732         struct snd_ctl_elem_value *ucontrol)
2733 {
2734         struct soc_mixer_control *mc =
2735                 (struct soc_mixer_control *)kcontrol->private_value;
2736         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2737         unsigned int reg = mc->reg;
2738         unsigned int reg2 = mc->rreg;
2739         unsigned int shift = mc->shift;
2740         int max = mc->max;
2741         unsigned int mask = (1 << fls(max)) - 1;
2742         unsigned int invert = mc->invert;
2743         int err;
2744         unsigned int val, val2, val_mask;
2745
2746         val_mask = mask << shift;
2747         val = (ucontrol->value.integer.value[0] & mask);
2748         val2 = (ucontrol->value.integer.value[1] & mask);
2749
2750         if (invert) {
2751                 val = max - val;
2752                 val2 = max - val2;
2753         }
2754
2755         val = val << shift;
2756         val2 = val2 << shift;
2757
2758         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2759         if (err < 0)
2760                 return err;
2761
2762         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2763         return err;
2764 }
2765 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2766
2767 /**
2768  * snd_soc_info_volsw_s8 - signed mixer info callback
2769  * @kcontrol: mixer control
2770  * @uinfo: control element information
2771  *
2772  * Callback to provide information about a signed mixer control.
2773  *
2774  * Returns 0 for success.
2775  */
2776 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2777         struct snd_ctl_elem_info *uinfo)
2778 {
2779         struct soc_mixer_control *mc =
2780                 (struct soc_mixer_control *)kcontrol->private_value;
2781         int platform_max;
2782         int min = mc->min;
2783
2784         if (!mc->platform_max)
2785                 mc->platform_max = mc->max;
2786         platform_max = mc->platform_max;
2787
2788         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2789         uinfo->count = 2;
2790         uinfo->value.integer.min = 0;
2791         uinfo->value.integer.max = platform_max - min;
2792         return 0;
2793 }
2794 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2795
2796 /**
2797  * snd_soc_get_volsw_s8 - signed mixer get callback
2798  * @kcontrol: mixer control
2799  * @ucontrol: control element information
2800  *
2801  * Callback to get the value of a signed mixer control.
2802  *
2803  * Returns 0 for success.
2804  */
2805 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2806         struct snd_ctl_elem_value *ucontrol)
2807 {
2808         struct soc_mixer_control *mc =
2809                 (struct soc_mixer_control *)kcontrol->private_value;
2810         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2811         unsigned int reg = mc->reg;
2812         int min = mc->min;
2813         int val = snd_soc_read(codec, reg);
2814
2815         ucontrol->value.integer.value[0] =
2816                 ((signed char)(val & 0xff))-min;
2817         ucontrol->value.integer.value[1] =
2818                 ((signed char)((val >> 8) & 0xff))-min;
2819         return 0;
2820 }
2821 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2822
2823 /**
2824  * snd_soc_put_volsw_sgn - signed mixer put callback
2825  * @kcontrol: mixer control
2826  * @ucontrol: control element information
2827  *
2828  * Callback to set the value of a signed mixer control.
2829  *
2830  * Returns 0 for success.
2831  */
2832 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2833         struct snd_ctl_elem_value *ucontrol)
2834 {
2835         struct soc_mixer_control *mc =
2836                 (struct soc_mixer_control *)kcontrol->private_value;
2837         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2838         unsigned int reg = mc->reg;
2839         int min = mc->min;
2840         unsigned int val;
2841
2842         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2843         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2844
2845         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2846 }
2847 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2848
2849 /**
2850  * snd_soc_limit_volume - Set new limit to an existing volume control.
2851  *
2852  * @codec: where to look for the control
2853  * @name: Name of the control
2854  * @max: new maximum limit
2855  *
2856  * Return 0 for success, else error.
2857  */
2858 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2859         const char *name, int max)
2860 {
2861         struct snd_card *card = codec->card->snd_card;
2862         struct snd_kcontrol *kctl;
2863         struct soc_mixer_control *mc;
2864         int found = 0;
2865         int ret = -EINVAL;
2866
2867         /* Sanity check for name and max */
2868         if (unlikely(!name || max <= 0))
2869                 return -EINVAL;
2870
2871         list_for_each_entry(kctl, &card->controls, list) {
2872                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2873                         found = 1;
2874                         break;
2875                 }
2876         }
2877         if (found) {
2878                 mc = (struct soc_mixer_control *)kctl->private_value;
2879                 if (max <= mc->max) {
2880                         mc->platform_max = max;
2881                         ret = 0;
2882                 }
2883         }
2884         return ret;
2885 }
2886 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2887
2888 /**
2889  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2890  *  mixer info callback
2891  * @kcontrol: mixer control
2892  * @uinfo: control element information
2893  *
2894  * Returns 0 for success.
2895  */
2896 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2897                         struct snd_ctl_elem_info *uinfo)
2898 {
2899         struct soc_mixer_control *mc =
2900                 (struct soc_mixer_control *)kcontrol->private_value;
2901         int max = mc->max;
2902         int min = mc->min;
2903
2904         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2905         uinfo->count = 2;
2906         uinfo->value.integer.min = 0;
2907         uinfo->value.integer.max = max-min;
2908
2909         return 0;
2910 }
2911 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2912
2913 /**
2914  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2915  *  mixer get callback
2916  * @kcontrol: mixer control
2917  * @uinfo: control element information
2918  *
2919  * Returns 0 for success.
2920  */
2921 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2922                         struct snd_ctl_elem_value *ucontrol)
2923 {
2924         struct soc_mixer_control *mc =
2925                 (struct soc_mixer_control *)kcontrol->private_value;
2926         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2927         unsigned int mask = (1<<mc->shift)-1;
2928         int min = mc->min;
2929         int val = snd_soc_read(codec, mc->reg) & mask;
2930         int valr = snd_soc_read(codec, mc->rreg) & mask;
2931
2932         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2933         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2934         return 0;
2935 }
2936 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2937
2938 /**
2939  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2940  *  mixer put callback
2941  * @kcontrol: mixer control
2942  * @uinfo: control element information
2943  *
2944  * Returns 0 for success.
2945  */
2946 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2947                         struct snd_ctl_elem_value *ucontrol)
2948 {
2949         struct soc_mixer_control *mc =
2950                 (struct soc_mixer_control *)kcontrol->private_value;
2951         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2952         unsigned int mask = (1<<mc->shift)-1;
2953         int min = mc->min;
2954         int ret;
2955         unsigned int val, valr, oval, ovalr;
2956
2957         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2958         val &= mask;
2959         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2960         valr &= mask;
2961
2962         oval = snd_soc_read(codec, mc->reg) & mask;
2963         ovalr = snd_soc_read(codec, mc->rreg) & mask;
2964
2965         ret = 0;
2966         if (oval != val) {
2967                 ret = snd_soc_write(codec, mc->reg, val);
2968                 if (ret < 0)
2969                         return ret;
2970         }
2971         if (ovalr != valr) {
2972                 ret = snd_soc_write(codec, mc->rreg, valr);
2973                 if (ret < 0)
2974                         return ret;
2975         }
2976
2977         return 0;
2978 }
2979 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2980
2981 /**
2982  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2983  * @dai: DAI
2984  * @clk_id: DAI specific clock ID
2985  * @freq: new clock frequency in Hz
2986  * @dir: new clock direction - input/output.
2987  *
2988  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2989  */
2990 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2991         unsigned int freq, int dir)
2992 {
2993         if (dai->driver && dai->driver->ops->set_sysclk)
2994                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2995         else
2996                 return -EINVAL;
2997 }
2998 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2999
3000 /**
3001  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3002  * @dai: DAI
3003  * @div_id: DAI specific clock divider ID
3004  * @div: new clock divisor.
3005  *
3006  * Configures the clock dividers. This is used to derive the best DAI bit and
3007  * frame clocks from the system or master clock. It's best to set the DAI bit
3008  * and frame clocks as low as possible to save system power.
3009  */
3010 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3011         int div_id, int div)
3012 {
3013         if (dai->driver && dai->driver->ops->set_clkdiv)
3014                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3015         else
3016                 return -EINVAL;
3017 }
3018 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3019
3020 /**
3021  * snd_soc_dai_set_pll - configure DAI PLL.
3022  * @dai: DAI
3023  * @pll_id: DAI specific PLL ID
3024  * @source: DAI specific source for the PLL
3025  * @freq_in: PLL input clock frequency in Hz
3026  * @freq_out: requested PLL output clock frequency in Hz
3027  *
3028  * Configures and enables PLL to generate output clock based on input clock.
3029  */
3030 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3031         unsigned int freq_in, unsigned int freq_out)
3032 {
3033         if (dai->driver && dai->driver->ops->set_pll)
3034                 return dai->driver->ops->set_pll(dai, pll_id, source,
3035                                          freq_in, freq_out);
3036         else
3037                 return -EINVAL;
3038 }
3039 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3040
3041 /**
3042  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3043  * @dai: DAI
3044  * @fmt: SND_SOC_DAIFMT_ format value.
3045  *
3046  * Configures the DAI hardware format and clocking.
3047  */
3048 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3049 {
3050         if (dai->driver && dai->driver->ops->set_fmt)
3051                 return dai->driver->ops->set_fmt(dai, fmt);
3052         else
3053                 return -EINVAL;
3054 }
3055 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3056
3057 /**
3058  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3059  * @dai: DAI
3060  * @tx_mask: bitmask representing active TX slots.
3061  * @rx_mask: bitmask representing active RX slots.
3062  * @slots: Number of slots in use.
3063  * @slot_width: Width in bits for each slot.
3064  *
3065  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3066  * specific.
3067  */
3068 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3069         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3070 {
3071         if (dai->driver && dai->driver->ops->set_tdm_slot)
3072                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3073                                 slots, slot_width);
3074         else
3075                 return -EINVAL;
3076 }
3077 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3078
3079 /**
3080  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3081  * @dai: DAI
3082  * @tx_num: how many TX channels
3083  * @tx_slot: pointer to an array which imply the TX slot number channel
3084  *           0~num-1 uses
3085  * @rx_num: how many RX channels
3086  * @rx_slot: pointer to an array which imply the RX slot number channel
3087  *           0~num-1 uses
3088  *
3089  * configure the relationship between channel number and TDM slot number.
3090  */
3091 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3092         unsigned int tx_num, unsigned int *tx_slot,
3093         unsigned int rx_num, unsigned int *rx_slot)
3094 {
3095         if (dai->driver && dai->driver->ops->set_channel_map)
3096                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3097                         rx_num, rx_slot);
3098         else
3099                 return -EINVAL;
3100 }
3101 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3102
3103 /**
3104  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3105  * @dai: DAI
3106  * @tristate: tristate enable
3107  *
3108  * Tristates the DAI so that others can use it.
3109  */
3110 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3111 {
3112         if (dai->driver && dai->driver->ops->set_tristate)
3113                 return dai->driver->ops->set_tristate(dai, tristate);
3114         else
3115                 return -EINVAL;
3116 }
3117 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3118
3119 /**
3120  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3121  * @dai: DAI
3122  * @mute: mute enable
3123  *
3124  * Mutes the DAI DAC.
3125  */
3126 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3127 {
3128         if (dai->driver && dai->driver->ops->digital_mute)
3129                 return dai->driver->ops->digital_mute(dai, mute);
3130         else
3131                 return -EINVAL;
3132 }
3133 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3134
3135 /**
3136  * snd_soc_register_card - Register a card with the ASoC core
3137  *
3138  * @card: Card to register
3139  *
3140  * Note that currently this is an internal only function: it will be
3141  * exposed to machine drivers after further backporting of ASoC v2
3142  * registration APIs.
3143  */
3144 static int snd_soc_register_card(struct snd_soc_card *card)
3145 {
3146         int i;
3147
3148         if (!card->name || !card->dev)
3149                 return -EINVAL;
3150
3151         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3152                             (card->num_links + card->num_aux_devs),
3153                             GFP_KERNEL);
3154         if (card->rtd == NULL)
3155                 return -ENOMEM;
3156         card->rtd_aux = &card->rtd[card->num_links];
3157
3158         for (i = 0; i < card->num_links; i++)
3159                 card->rtd[i].dai_link = &card->dai_link[i];
3160
3161         INIT_LIST_HEAD(&card->list);
3162         card->instantiated = 0;
3163         mutex_init(&card->mutex);
3164
3165         mutex_lock(&client_mutex);
3166         list_add(&card->list, &card_list);
3167         snd_soc_instantiate_cards();
3168         mutex_unlock(&client_mutex);
3169
3170         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3171
3172         return 0;
3173 }
3174
3175 /**
3176  * snd_soc_unregister_card - Unregister a card with the ASoC core
3177  *
3178  * @card: Card to unregister
3179  *
3180  * Note that currently this is an internal only function: it will be
3181  * exposed to machine drivers after further backporting of ASoC v2
3182  * registration APIs.
3183  */
3184 static int snd_soc_unregister_card(struct snd_soc_card *card)
3185 {
3186         mutex_lock(&client_mutex);
3187         list_del(&card->list);
3188         mutex_unlock(&client_mutex);
3189         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3190
3191         return 0;
3192 }
3193
3194 /*
3195  * Simplify DAI link configuration by removing ".-1" from device names
3196  * and sanitizing names.
3197  */
3198 static inline char *fmt_single_name(struct device *dev, int *id)
3199 {
3200         char *found, name[NAME_SIZE];
3201         int id1, id2;
3202
3203         if (dev_name(dev) == NULL)
3204                 return NULL;
3205
3206         strncpy(name, dev_name(dev), NAME_SIZE);
3207
3208         /* are we a "%s.%d" name (platform and SPI components) */
3209         found = strstr(name, dev->driver->name);
3210         if (found) {
3211                 /* get ID */
3212                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3213
3214                         /* discard ID from name if ID == -1 */
3215                         if (*id == -1)
3216                                 found[strlen(dev->driver->name)] = '\0';
3217                 }
3218
3219         } else {
3220                 /* I2C component devices are named "bus-addr"  */
3221                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3222                         char tmp[NAME_SIZE];
3223
3224                         /* create unique ID number from I2C addr and bus */
3225                         *id = ((id1 & 0xffff) << 16) + id2;
3226
3227                         /* sanitize component name for DAI link creation */
3228                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3229                         strncpy(name, tmp, NAME_SIZE);
3230                 } else
3231                         *id = 0;
3232         }
3233
3234         return kstrdup(name, GFP_KERNEL);
3235 }
3236
3237 /*
3238  * Simplify DAI link naming for single devices with multiple DAIs by removing
3239  * any ".-1" and using the DAI name (instead of device name).
3240  */
3241 static inline char *fmt_multiple_name(struct device *dev,
3242                 struct snd_soc_dai_driver *dai_drv)
3243 {
3244         if (dai_drv->name == NULL) {
3245                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3246                                 dev_name(dev));
3247                 return NULL;
3248         }
3249
3250         return kstrdup(dai_drv->name, GFP_KERNEL);
3251 }
3252
3253 /**
3254  * snd_soc_register_dai - Register a DAI with the ASoC core
3255  *
3256  * @dai: DAI to register
3257  */
3258 int snd_soc_register_dai(struct device *dev,
3259                 struct snd_soc_dai_driver *dai_drv)
3260 {
3261         struct snd_soc_dai *dai;
3262
3263         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3264
3265         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3266         if (dai == NULL)
3267                         return -ENOMEM;
3268
3269         /* create DAI component name */
3270         dai->name = fmt_single_name(dev, &dai->id);
3271         if (dai->name == NULL) {
3272                 kfree(dai);
3273                 return -ENOMEM;
3274         }
3275
3276         dai->dev = dev;
3277         dai->driver = dai_drv;
3278         if (!dai->driver->ops)
3279                 dai->driver->ops = &null_dai_ops;
3280
3281         mutex_lock(&client_mutex);
3282         list_add(&dai->list, &dai_list);
3283         snd_soc_instantiate_cards();
3284         mutex_unlock(&client_mutex);
3285
3286         pr_debug("Registered DAI '%s'\n", dai->name);
3287
3288         return 0;
3289 }
3290 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3291
3292 /**
3293  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3294  *
3295  * @dai: DAI to unregister
3296  */
3297 void snd_soc_unregister_dai(struct device *dev)
3298 {
3299         struct snd_soc_dai *dai;
3300
3301         list_for_each_entry(dai, &dai_list, list) {
3302                 if (dev == dai->dev)
3303                         goto found;
3304         }
3305         return;
3306
3307 found:
3308         mutex_lock(&client_mutex);
3309         list_del(&dai->list);
3310         mutex_unlock(&client_mutex);
3311
3312         pr_debug("Unregistered DAI '%s'\n", dai->name);
3313         kfree(dai->name);
3314         kfree(dai);
3315 }
3316 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3317
3318 /**
3319  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3320  *
3321  * @dai: Array of DAIs to register
3322  * @count: Number of DAIs
3323  */
3324 int snd_soc_register_dais(struct device *dev,
3325                 struct snd_soc_dai_driver *dai_drv, size_t count)
3326 {
3327         struct snd_soc_dai *dai;
3328         int i, ret = 0;
3329
3330         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3331
3332         for (i = 0; i < count; i++) {
3333
3334                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3335                 if (dai == NULL) {
3336                         ret = -ENOMEM;
3337                         goto err;
3338                 }
3339
3340                 /* create DAI component name */
3341                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3342                 if (dai->name == NULL) {
3343                         kfree(dai);
3344                         ret = -EINVAL;
3345                         goto err;
3346                 }
3347
3348                 dai->dev = dev;
3349                 dai->driver = &dai_drv[i];
3350                 if (dai->driver->id)
3351                         dai->id = dai->driver->id;
3352                 else
3353                         dai->id = i;
3354                 if (!dai->driver->ops)
3355                         dai->driver->ops = &null_dai_ops;
3356
3357                 mutex_lock(&client_mutex);
3358                 list_add(&dai->list, &dai_list);
3359                 mutex_unlock(&client_mutex);
3360
3361                 pr_debug("Registered DAI '%s'\n", dai->name);
3362         }
3363
3364         mutex_lock(&client_mutex);
3365         snd_soc_instantiate_cards();
3366         mutex_unlock(&client_mutex);
3367         return 0;
3368
3369 err:
3370         for (i--; i >= 0; i--)
3371                 snd_soc_unregister_dai(dev);
3372
3373         return ret;
3374 }
3375 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3376
3377 /**
3378  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3379  *
3380  * @dai: Array of DAIs to unregister
3381  * @count: Number of DAIs
3382  */
3383 void snd_soc_unregister_dais(struct device *dev, size_t count)
3384 {
3385         int i;
3386
3387         for (i = 0; i < count; i++)
3388                 snd_soc_unregister_dai(dev);
3389 }
3390 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3391
3392 /**
3393  * snd_soc_register_platform - Register a platform with the ASoC core
3394  *
3395  * @platform: platform to register
3396  */
3397 int snd_soc_register_platform(struct device *dev,
3398                 struct snd_soc_platform_driver *platform_drv)
3399 {
3400         struct snd_soc_platform *platform;
3401
3402         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3403
3404         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3405         if (platform == NULL)
3406                         return -ENOMEM;
3407
3408         /* create platform component name */
3409         platform->name = fmt_single_name(dev, &platform->id);
3410         if (platform->name == NULL) {
3411                 kfree(platform);
3412                 return -ENOMEM;
3413         }
3414
3415         platform->dev = dev;
3416         platform->driver = platform_drv;
3417
3418         mutex_lock(&client_mutex);
3419         list_add(&platform->list, &platform_list);
3420         snd_soc_instantiate_cards();
3421         mutex_unlock(&client_mutex);
3422
3423         pr_debug("Registered platform '%s'\n", platform->name);
3424
3425         return 0;
3426 }
3427 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3428
3429 /**
3430  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3431  *
3432  * @platform: platform to unregister
3433  */
3434 void snd_soc_unregister_platform(struct device *dev)
3435 {
3436         struct snd_soc_platform *platform;
3437
3438         list_for_each_entry(platform, &platform_list, list) {
3439                 if (dev == platform->dev)
3440                         goto found;
3441         }
3442         return;
3443
3444 found:
3445         mutex_lock(&client_mutex);
3446         list_del(&platform->list);
3447         mutex_unlock(&client_mutex);
3448
3449         pr_debug("Unregistered platform '%s'\n", platform->name);
3450         kfree(platform->name);
3451         kfree(platform);
3452 }
3453 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3454
3455 static u64 codec_format_map[] = {
3456         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3457         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3458         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3459         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3460         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3461         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3462         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3463         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3464         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3465         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3466         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3467         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3468         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3469         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3470         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3471         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3472 };
3473
3474 /* Fix up the DAI formats for endianness: codecs don't actually see
3475  * the endianness of the data but we're using the CPU format
3476  * definitions which do need to include endianness so we ensure that
3477  * codec DAIs always have both big and little endian variants set.
3478  */
3479 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3480 {
3481         int i;
3482
3483         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3484                 if (stream->formats & codec_format_map[i])
3485                         stream->formats |= codec_format_map[i];
3486 }
3487
3488 /**
3489  * snd_soc_register_codec - Register a codec with the ASoC core
3490  *
3491  * @codec: codec to register
3492  */
3493 int snd_soc_register_codec(struct device *dev,
3494                            const struct snd_soc_codec_driver *codec_drv,
3495                            struct snd_soc_dai_driver *dai_drv,
3496                            int num_dai)
3497 {
3498         size_t reg_size;
3499         struct snd_soc_codec *codec;
3500         int ret, i;
3501
3502         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3503
3504         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3505         if (codec == NULL)
3506                 return -ENOMEM;
3507
3508         /* create CODEC component name */
3509         codec->name = fmt_single_name(dev, &codec->id);
3510         if (codec->name == NULL) {
3511                 kfree(codec);
3512                 return -ENOMEM;
3513         }
3514
3515         if (codec_drv->compress_type)
3516                 codec->compress_type = codec_drv->compress_type;
3517         else
3518                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3519
3520         INIT_LIST_HEAD(&codec->dapm.widgets);
3521         INIT_LIST_HEAD(&codec->dapm.paths);
3522         codec->write = codec_drv->write;
3523         codec->read = codec_drv->read;
3524         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3525         codec->dapm.dev = dev;
3526         codec->dapm.codec = codec;
3527         codec->dev = dev;
3528         codec->driver = codec_drv;
3529         codec->num_dai = num_dai;
3530         mutex_init(&codec->mutex);
3531
3532         /* allocate CODEC register cache */
3533         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3534                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3535                 /* it is necessary to make a copy of the default register cache
3536                  * because in the case of using a compression type that requires
3537                  * the default register cache to be marked as __devinitconst the
3538                  * kernel might have freed the array by the time we initialize
3539                  * the cache.
3540                  */
3541                 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3542                                               reg_size, GFP_KERNEL);
3543                 if (!codec->reg_def_copy) {
3544                         ret = -ENOMEM;
3545                         goto fail;
3546                 }
3547         }
3548
3549         for (i = 0; i < num_dai; i++) {
3550                 fixup_codec_formats(&dai_drv[i].playback);
3551                 fixup_codec_formats(&dai_drv[i].capture);
3552         }
3553
3554         /* register any DAIs */
3555         if (num_dai) {
3556                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3557                 if (ret < 0)
3558                         goto fail;
3559         }
3560
3561         mutex_lock(&client_mutex);
3562         list_add(&codec->list, &codec_list);
3563         snd_soc_instantiate_cards();
3564         mutex_unlock(&client_mutex);
3565
3566         pr_debug("Registered codec '%s'\n", codec->name);
3567         return 0;
3568
3569 fail:
3570         kfree(codec->reg_def_copy);
3571         codec->reg_def_copy = NULL;
3572         kfree(codec->name);
3573         kfree(codec);
3574         return ret;
3575 }
3576 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3577
3578 /**
3579  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3580  *
3581  * @codec: codec to unregister
3582  */
3583 void snd_soc_unregister_codec(struct device *dev)
3584 {
3585         struct snd_soc_codec *codec;
3586         int i;
3587
3588         list_for_each_entry(codec, &codec_list, list) {
3589                 if (dev == codec->dev)
3590                         goto found;
3591         }
3592         return;
3593
3594 found:
3595         if (codec->num_dai)
3596                 for (i = 0; i < codec->num_dai; i++)
3597                         snd_soc_unregister_dai(dev);
3598
3599         mutex_lock(&client_mutex);
3600         list_del(&codec->list);
3601         mutex_unlock(&client_mutex);
3602
3603         pr_debug("Unregistered codec '%s'\n", codec->name);
3604
3605         snd_soc_cache_exit(codec);
3606         kfree(codec->reg_def_copy);
3607         kfree(codec->name);
3608         kfree(codec);
3609 }
3610 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3611
3612 static int __init snd_soc_init(void)
3613 {
3614 #ifdef CONFIG_DEBUG_FS
3615         debugfs_root = debugfs_create_dir("asoc", NULL);
3616         if (IS_ERR(debugfs_root) || !debugfs_root) {
3617                 printk(KERN_WARNING
3618                        "ASoC: Failed to create debugfs directory\n");
3619                 debugfs_root = NULL;
3620         }
3621
3622         if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL,
3623                                  &codec_list_fops))
3624                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3625
3626         if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
3627                                  &dai_list_fops))
3628                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3629
3630         if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
3631                                  &platform_list_fops))
3632                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3633 #endif
3634
3635         return platform_driver_register(&soc_driver);
3636 }
3637 module_init(snd_soc_init);
3638
3639 static void __exit snd_soc_exit(void)
3640 {
3641 #ifdef CONFIG_DEBUG_FS
3642         debugfs_remove_recursive(debugfs_root);
3643 #endif
3644         platform_driver_unregister(&soc_driver);
3645 }
3646 module_exit(snd_soc_exit);
3647
3648 /* Module information */
3649 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3650 MODULE_DESCRIPTION("ALSA SoC Core");
3651 MODULE_LICENSE("GPL");
3652 MODULE_ALIAS("platform:soc-audio");