sound/soc/soc-core.c

   1 /*
   2  * soc-core.c  --  ALSA SoC Audio Layer
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright (C) 2010 Slimlogic Ltd.
   7  * Copyright (C) 2010 Texas Instruments Inc.
   8  *
   9  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
  10  *         with code, comments and ideas from :-
  11  *         Richard Purdie <richard@openedhand.com>
  12  *
  13  *  This program is free software; you can redistribute  it and/or modify it
  14  *  under  the terms of  the GNU General  Public License as published by the
  15  *  Free Software Foundation;  either version 2 of the  License, or (at your
  16  *  option) any later version.
  17  *
  18  *  TODO:
  19  *   o Add hw rules to enforce rates, etc.
  20  *   o More testing with other codecs/machines.
  21  *   o Add more codecs and platforms to ensure good API coverage.
  22  *   o Support TDM on PCM and I2S
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/bitops.h>
  31 #include <linux/debugfs.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/slab.h>
  34 #include <sound/ac97_codec.h>
  35 #include <sound/core.h>
  36 #include <sound/jack.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include <sound/soc.h>
  40 #include <sound/initval.h>
  41
  42 #define CREATE_TRACE_POINTS
  43 #include <trace/events/asoc.h>
  44
  45 #define NAME_SIZE       32
  46
  47 static DEFINE_MUTEX(pcm_mutex);
  48 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
  49
  50 #ifdef CONFIG_DEBUG_FS
  51 struct dentry *snd_soc_debugfs_root;
  52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
  53 #endif
  54
  55 static DEFINE_MUTEX(client_mutex);
  56 static LIST_HEAD(card_list);
  57 static LIST_HEAD(dai_list);
  58 static LIST_HEAD(platform_list);
  59 static LIST_HEAD(codec_list);
  60
  61 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
  62
  63 /*
  64  * This is a timeout to do a DAPM powerdown after a stream is closed().
  65  * It can be used to eliminate pops between different playback streams, e.g.
  66  * between two audio tracks.
  67  */
  68 static int pmdown_time = 5000;
  69 module_param(pmdown_time, int, 0);
  70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  71
  72 /* returns the minimum number of bytes needed to represent
  73  * a particular given value */
  74 static int min_bytes_needed(unsigned long val)
  75 {
  76         int c = 0;
  77         int i;
  78
  79         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
  80                 if (val & (1UL << i))
  81                         break;
  82         c = (sizeof val * 8) - c;
  83         if (!c || (c % 8))
  84                 c = (c + 8) / 8;
  85         else
  86                 c /= 8;
  87         return c;
  88 }
  89
  90 /* fill buf which is 'len' bytes with a formatted
  91  * string of the form 'reg: value\n' */
  92 static int format_register_str(struct snd_soc_codec *codec,
  93                                unsigned int reg, char *buf, size_t len)
  94 {
  95         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
  96         int regsize = codec->driver->reg_word_size * 2;
  97         int ret;
  98         char tmpbuf[len + 1];
  99         char regbuf[regsize + 1];
 100
 101         /* since tmpbuf is allocated on the stack, warn the callers if they
 102          * try to abuse this function */
 103         WARN_ON(len > 63);
 104
 105         /* +2 for ': ' and + 1 for '\n' */
 106         if (wordsize + regsize + 2 + 1 != len)
 107                 return -EINVAL;
 108
 109         ret = snd_soc_read(codec , reg);
 110         if (ret < 0) {
 111                 memset(regbuf, 'X', regsize);
 112                 regbuf[regsize] = '\0';
 113         } else {
 114                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
 115         }
 116
 117         /* prepare the buffer */
 118         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
 119         /* copy it back to the caller without the '\0' */
 120         memcpy(buf, tmpbuf, len);
 121
 122         return 0;
 123 }
 124
 125 /* codec register dump */
 126 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
 127                                   size_t count, loff_t pos)
 128 {
 129         int i, step = 1;
 130         int wordsize, regsize;
 131         int len;
 132         size_t total = 0;
 133         loff_t p = 0;
 134
 135         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 136         regsize = codec->driver->reg_word_size * 2;
 137
 138         len = wordsize + regsize + 2 + 1;
 139
 140         if (!codec->driver->reg_cache_size)
 141                 return 0;
 142
 143         if (codec->driver->reg_cache_step)
 144                 step = codec->driver->reg_cache_step;
 145
 146         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 147                 if (codec->readable_register && !codec->readable_register(codec, i))
 148                         continue;
 149                 if (codec->driver->display_register) {
 150                         count += codec->driver->display_register(codec, buf + count,
 151                                                          PAGE_SIZE - count, i);
 152                 } else {
 153                         /* only support larger than PAGE_SIZE bytes debugfs
 154                          * entries for the default case */
 155                         if (p >= pos) {
 156                                 if (total + len >= count - 1)
 157                                         break;
 158                                 format_register_str(codec, i, buf + total, len);
 159                                 total += len;
 160                         }
 161                         p += len;
 162                 }
 163         }
 164
 165         total = min(total, count - 1);
 166
 167         return total;
 168 }
 169
 170 static ssize_t codec_reg_show(struct device *dev,
 171         struct device_attribute *attr, char *buf)
 172 {
 173         struct snd_soc_pcm_runtime *rtd =
 174                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 175
 176         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 177 }
 178
 179 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 180
 181 static ssize_t pmdown_time_show(struct device *dev,
 182                                 struct device_attribute *attr, char *buf)
 183 {
 184         struct snd_soc_pcm_runtime *rtd =
 185                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 186
 187         return sprintf(buf, "%ld\n", rtd->pmdown_time);
 188 }
 189
 190 static ssize_t pmdown_time_set(struct device *dev,
 191                                struct device_attribute *attr,
 192                                const char *buf, size_t count)
 193 {
 194         struct snd_soc_pcm_runtime *rtd =
 195                         container_of(dev, struct snd_soc_pcm_runtime, dev);
 196         int ret;
 197
 198         ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 199         if (ret)
 200                 return ret;
 201
 202         return count;
 203 }
 204
 205 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 206
 207 #ifdef CONFIG_DEBUG_FS
 208 static int codec_reg_open_file(struct inode *inode, struct file *file)
 209 {
 210         file->private_data = inode->i_private;
 211         return 0;
 212 }
 213
 214 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 215                                    size_t count, loff_t *ppos)
 216 {
 217         ssize_t ret;
 218         struct snd_soc_codec *codec = file->private_data;
 219         char *buf;
 220
 221         if (*ppos < 0 || !count)
 222                 return -EINVAL;
 223
 224         buf = kmalloc(count, GFP_KERNEL);
 225         if (!buf)
 226                 return -ENOMEM;
 227
 228         ret = soc_codec_reg_show(codec, buf, count, *ppos);
 229         if (ret >= 0) {
 230                 if (copy_to_user(user_buf, buf, ret)) {
 231                         kfree(buf);
 232                         return -EFAULT;
 233                 }
 234                 *ppos += ret;
 235         }
 236
 237         kfree(buf);
 238         return ret;
 239 }
 240
 241 static ssize_t codec_reg_write_file(struct file *file,
 242                 const char __user *user_buf, size_t count, loff_t *ppos)
 243 {
 244         char buf[32];
 245         int buf_size;
 246         char *start = buf;
 247         unsigned long reg, value;
 248         int step = 1;
 249         struct snd_soc_codec *codec = file->private_data;
 250
 251         buf_size = min(count, (sizeof(buf)-1));
 252         if (copy_from_user(buf, user_buf, buf_size))
 253                 return -EFAULT;
 254         buf[buf_size] = 0;
 255
 256         if (codec->driver->reg_cache_step)
 257                 step = codec->driver->reg_cache_step;
 258
 259         while (*start == ' ')
 260                 start++;
 261         reg = simple_strtoul(start, &start, 16);
 262         while (*start == ' ')
 263                 start++;
 264         if (strict_strtoul(start, 16, &value))
 265                 return -EINVAL;
 266
 267         /* Userspace has been fiddling around behind the kernel's back */
 268         add_taint(TAINT_USER);
 269
 270         snd_soc_write(codec, reg, value);
 271         return buf_size;
 272 }
 273
 274 static const struct file_operations codec_reg_fops = {
 275         .open = codec_reg_open_file,
 276         .read = codec_reg_read_file,
 277         .write = codec_reg_write_file,
 278         .llseek = default_llseek,
 279 };
 280
 281 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 282 {
 283         struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 284
 285         codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 286                                                        debugfs_card_root);
 287         if (!codec->debugfs_codec_root) {
 288                 printk(KERN_WARNING
 289                        "ASoC: Failed to create codec debugfs directory\n");
 290                 return;
 291         }
 292
 293         debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
 294                             &codec->cache_sync);
 295         debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
 296                             &codec->cache_only);
 297
 298         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 299                                                  codec->debugfs_codec_root,
 300                                                  codec, &codec_reg_fops);
 301         if (!codec->debugfs_reg)
 302                 printk(KERN_WARNING
 303                        "ASoC: Failed to create codec register debugfs file\n");
 304
 305         codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
 306                                                  codec->debugfs_codec_root);
 307         if (!codec->dapm.debugfs_dapm)
 308                 printk(KERN_WARNING
 309                        "Failed to create DAPM debugfs directory\n");
 310
 311         snd_soc_dapm_debugfs_init(&codec->dapm);
 312 }
 313
 314 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 315 {
 316         debugfs_remove_recursive(codec->debugfs_codec_root);
 317 }
 318
 319 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 320                                     size_t count, loff_t *ppos)
 321 {
 322         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 323         ssize_t len, ret = 0;
 324         struct snd_soc_codec *codec;
 325
 326         if (!buf)
 327                 return -ENOMEM;
 328
 329         list_for_each_entry(codec, &codec_list, list) {
 330                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 331                                codec->name);
 332                 if (len >= 0)
 333                         ret += len;
 334                 if (ret > PAGE_SIZE) {
 335                         ret = PAGE_SIZE;
 336                         break;
 337                 }
 338         }
 339
 340         if (ret >= 0)
 341                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 342
 343         kfree(buf);
 344
 345         return ret;
 346 }
 347
 348 static const struct file_operations codec_list_fops = {
 349         .read = codec_list_read_file,
 350         .llseek = default_llseek,/* read accesses f_pos */
 351 };
 352
 353 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 354                                   size_t count, loff_t *ppos)
 355 {
 356         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 357         ssize_t len, ret = 0;
 358         struct snd_soc_dai *dai;
 359
 360         if (!buf)
 361                 return -ENOMEM;
 362
 363         list_for_each_entry(dai, &dai_list, list) {
 364                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 365                 if (len >= 0)
 366                         ret += len;
 367                 if (ret > PAGE_SIZE) {
 368                         ret = PAGE_SIZE;
 369                         break;
 370                 }
 371         }
 372
 373         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 374
 375         kfree(buf);
 376
 377         return ret;
 378 }
 379
 380 static const struct file_operations dai_list_fops = {
 381         .read = dai_list_read_file,
 382         .llseek = default_llseek,/* read accesses f_pos */
 383 };
 384
 385 static ssize_t platform_list_read_file(struct file *file,
 386                                        char __user *user_buf,
 387                                        size_t count, loff_t *ppos)
 388 {
 389         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 390         ssize_t len, ret = 0;
 391         struct snd_soc_platform *platform;
 392
 393         if (!buf)
 394                 return -ENOMEM;
 395
 396         list_for_each_entry(platform, &platform_list, list) {
 397                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 398                                platform->name);
 399                 if (len >= 0)
 400                         ret += len;
 401                 if (ret > PAGE_SIZE) {
 402                         ret = PAGE_SIZE;
 403                         break;
 404                 }
 405         }
 406
 407         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 408
 409         kfree(buf);
 410
 411         return ret;
 412 }
 413
 414 static const struct file_operations platform_list_fops = {
 415         .read = platform_list_read_file,
 416         .llseek = default_llseek,/* read accesses f_pos */
 417 };
 418
 419 static void soc_init_card_debugfs(struct snd_soc_card *card)
 420 {
 421         card->debugfs_card_root = debugfs_create_dir(card->name,
 422                                                      snd_soc_debugfs_root);
 423         if (!card->debugfs_card_root) {
 424                 dev_warn(card->dev,
 425                          "ASoC: Failed to create codec debugfs directory\n");
 426                 return;
 427         }
 428
 429         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 430                                                     card->debugfs_card_root,
 431                                                     &card->pop_time);
 432         if (!card->debugfs_pop_time)
 433                 dev_warn(card->dev,
 434                        "Failed to create pop time debugfs file\n");
 435 }
 436
 437 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 438 {
 439         debugfs_remove_recursive(card->debugfs_card_root);
 440 }
 441
 442 #else
 443
 444 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 445 {
 446 }
 447
 448 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 449 {
 450 }
 451
 452 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 453 {
 454 }
 455
 456 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 457 {
 458 }
 459 #endif
 460
 461 #ifdef CONFIG_SND_SOC_AC97_BUS
 462 /* unregister ac97 codec */
 463 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 464 {
 465         if (codec->ac97->dev.bus)
 466                 device_unregister(&codec->ac97->dev);
 467         return 0;
 468 }
 469
 470 /* stop no dev release warning */
 471 static void soc_ac97_device_release(struct device *dev){}
 472
 473 /* register ac97 codec to bus */
 474 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 475 {
 476         int err;
 477
 478         codec->ac97->dev.bus = &ac97_bus_type;
 479         codec->ac97->dev.parent = codec->card->dev;
 480         codec->ac97->dev.release = soc_ac97_device_release;
 481
 482         dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 483                      codec->card->snd_card->number, 0, codec->name);
 484         err = device_register(&codec->ac97->dev);
 485         if (err < 0) {
 486                 snd_printk(KERN_ERR "Can't register ac97 bus\n");
 487                 codec->ac97->dev.bus = NULL;
 488                 return err;
 489         }
 490         return 0;
 491 }
 492 #endif
 493
 494 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
 495 {
 496         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 497         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 498         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 499         int ret;
 500
 501         if (!codec_dai->driver->symmetric_rates &&
 502             !cpu_dai->driver->symmetric_rates &&
 503             !rtd->dai_link->symmetric_rates)
 504                 return 0;
 505
 506         /* This can happen if multiple streams are starting simultaneously -
 507          * the second can need to get its constraints before the first has
 508          * picked a rate.  Complain and allow the application to carry on.
 509          */
 510         if (!rtd->rate) {
 511                 dev_warn(&rtd->dev,
 512                          "Not enforcing symmetric_rates due to race\n");
 513                 return 0;
 514         }
 515
 516         dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
 517
 518         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 519                                            SNDRV_PCM_HW_PARAM_RATE,
 520                                            rtd->rate, rtd->rate);
 521         if (ret < 0) {
 522                 dev_err(&rtd->dev,
 523                         "Unable to apply rate symmetry constraint: %d\n", ret);
 524                 return ret;
 525         }
 526
 527         return 0;
 528 }
 529
 530 /*
 531  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 532  * then initialized and any private data can be allocated. This also calls
 533  * startup for the cpu DAI, platform, machine and codec DAI.
 534  */
 535 static int soc_pcm_open(struct snd_pcm_substream *substream)
 536 {
 537         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 538         struct snd_pcm_runtime *runtime = substream->runtime;
 539         struct snd_soc_platform *platform = rtd->platform;
 540         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 541         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 542         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 543         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 544         int ret = 0;
 545
 546         mutex_lock(&pcm_mutex);
 547
 548         /* startup the audio subsystem */
 549         if (cpu_dai->driver->ops->startup) {
 550                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 551                 if (ret < 0) {
 552                         printk(KERN_ERR "asoc: can't open interface %s\n",
 553                                 cpu_dai->name);
 554                         goto out;
 555                 }
 556         }
 557
 558         if (platform->driver->ops->open) {
 559                 ret = platform->driver->ops->open(substream);
 560                 if (ret < 0) {
 561                         printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
 562                         goto platform_err;
 563                 }
 564         }
 565
 566         if (codec_dai->driver->ops->startup) {
 567                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 568                 if (ret < 0) {
 569                         printk(KERN_ERR "asoc: can't open codec %s\n",
 570                                 codec_dai->name);
 571                         goto codec_dai_err;
 572                 }
 573         }
 574
 575         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 576                 ret = rtd->dai_link->ops->startup(substream);
 577                 if (ret < 0) {
 578                         printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
 579                         goto machine_err;
 580                 }
 581         }
 582
 583         /* Check that the codec and cpu DAIs are compatible */
 584         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 585                 runtime->hw.rate_min =
 586                         max(codec_dai_drv->playback.rate_min,
 587                             cpu_dai_drv->playback.rate_min);
 588                 runtime->hw.rate_max =
 589                         min(codec_dai_drv->playback.rate_max,
 590                             cpu_dai_drv->playback.rate_max);
 591                 runtime->hw.channels_min =
 592                         max(codec_dai_drv->playback.channels_min,
 593                                 cpu_dai_drv->playback.channels_min);
 594                 runtime->hw.channels_max =
 595                         min(codec_dai_drv->playback.channels_max,
 596                                 cpu_dai_drv->playback.channels_max);
 597                 runtime->hw.formats =
 598                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 599                 runtime->hw.rates =
 600                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 601                 if (codec_dai_drv->playback.rates
 602                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 603                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 604                 if (cpu_dai_drv->playback.rates
 605                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 606                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 607         } else {
 608                 runtime->hw.rate_min =
 609                         max(codec_dai_drv->capture.rate_min,
 610                             cpu_dai_drv->capture.rate_min);
 611                 runtime->hw.rate_max =
 612                         min(codec_dai_drv->capture.rate_max,
 613                             cpu_dai_drv->capture.rate_max);
 614                 runtime->hw.channels_min =
 615                         max(codec_dai_drv->capture.channels_min,
 616                                 cpu_dai_drv->capture.channels_min);
 617                 runtime->hw.channels_max =
 618                         min(codec_dai_drv->capture.channels_max,
 619                                 cpu_dai_drv->capture.channels_max);
 620                 runtime->hw.formats =
 621                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 622                 runtime->hw.rates =
 623                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 624                 if (codec_dai_drv->capture.rates
 625                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 626                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 627                 if (cpu_dai_drv->capture.rates
 628                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 629                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 630         }
 631
 632         ret = -EINVAL;
 633         snd_pcm_limit_hw_rates(runtime);
 634         if (!runtime->hw.rates) {
 635                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 636                         codec_dai->name, cpu_dai->name);
 637                 goto config_err;
 638         }
 639         if (!runtime->hw.formats) {
 640                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 641                         codec_dai->name, cpu_dai->name);
 642                 goto config_err;
 643         }
 644         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 645             runtime->hw.channels_min > runtime->hw.channels_max) {
 646                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 647                                 codec_dai->name, cpu_dai->name);
 648                 goto config_err;
 649         }
 650
 651         /* Symmetry only applies if we've already got an active stream. */
 652         if (cpu_dai->active || codec_dai->active) {
 653                 ret = soc_pcm_apply_symmetry(substream);
 654                 if (ret != 0)
 655                         goto config_err;
 656         }
 657
 658         pr_debug("asoc: %s <-> %s info:\n",
 659                         codec_dai->name, cpu_dai->name);
 660         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 661         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 662                  runtime->hw.channels_max);
 663         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 664                  runtime->hw.rate_max);
 665
 666         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 667                 cpu_dai->playback_active++;
 668                 codec_dai->playback_active++;
 669         } else {
 670                 cpu_dai->capture_active++;
 671                 codec_dai->capture_active++;
 672         }
 673         cpu_dai->active++;
 674         codec_dai->active++;
 675         rtd->codec->active++;
 676         mutex_unlock(&pcm_mutex);
 677         return 0;
 678
 679 config_err:
 680         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 681                 rtd->dai_link->ops->shutdown(substream);
 682
 683 machine_err:
 684         if (codec_dai->driver->ops->shutdown)
 685                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 686
 687 codec_dai_err:
 688         if (platform->driver->ops->close)
 689                 platform->driver->ops->close(substream);
 690
 691 platform_err:
 692         if (cpu_dai->driver->ops->shutdown)
 693                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 694 out:
 695         mutex_unlock(&pcm_mutex);
 696         return ret;
 697 }
 698
 699 /*
 700  * Power down the audio subsystem pmdown_time msecs after close is called.
 701  * This is to ensure there are no pops or clicks in between any music tracks
 702  * due to DAPM power cycling.
 703  */
 704 static void close_delayed_work(struct work_struct *work)
 705 {
 706         struct snd_soc_pcm_runtime *rtd =
 707                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 708         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 709
 710         mutex_lock(&pcm_mutex);
 711
 712         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 713                  codec_dai->driver->playback.stream_name,
 714                  codec_dai->playback_active ? "active" : "inactive",
 715                  codec_dai->pop_wait ? "yes" : "no");
 716
 717         /* are we waiting on this codec DAI stream */
 718         if (codec_dai->pop_wait == 1) {
 719                 codec_dai->pop_wait = 0;
 720                 snd_soc_dapm_stream_event(rtd,
 721                         codec_dai->driver->playback.stream_name,
 722                         SND_SOC_DAPM_STREAM_STOP);
 723         }
 724
 725         mutex_unlock(&pcm_mutex);
 726 }
 727
 728 /*
 729  * Called by ALSA when a PCM substream is closed. Private data can be
 730  * freed here. The cpu DAI, codec DAI, machine and platform are also
 731  * shutdown.
 732  */
 733 static int soc_codec_close(struct snd_pcm_substream *substream)
 734 {
 735         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 736         struct snd_soc_platform *platform = rtd->platform;
 737         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 738         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 739         struct snd_soc_codec *codec = rtd->codec;
 740
 741         mutex_lock(&pcm_mutex);
 742
 743         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 744                 cpu_dai->playback_active--;
 745                 codec_dai->playback_active--;
 746         } else {
 747                 cpu_dai->capture_active--;
 748                 codec_dai->capture_active--;
 749         }
 750
 751         cpu_dai->active--;
 752         codec_dai->active--;
 753         codec->active--;
 754
 755         /* Muting the DAC suppresses artifacts caused during digital
 756          * shutdown, for example from stopping clocks.
 757          */
 758         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 759                 snd_soc_dai_digital_mute(codec_dai, 1);
 760
 761         if (cpu_dai->driver->ops->shutdown)
 762                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 763
 764         if (codec_dai->driver->ops->shutdown)
 765                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 766
 767         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 768                 rtd->dai_link->ops->shutdown(substream);
 769
 770         if (platform->driver->ops->close)
 771                 platform->driver->ops->close(substream);
 772         cpu_dai->runtime = NULL;
 773
 774         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 775                 /* start delayed pop wq here for playback streams */
 776                 codec_dai->pop_wait = 1;
 777                 schedule_delayed_work(&rtd->delayed_work,
 778                         msecs_to_jiffies(rtd->pmdown_time));
 779         } else {
 780                 /* capture streams can be powered down now */
 781                 snd_soc_dapm_stream_event(rtd,
 782                         codec_dai->driver->capture.stream_name,
 783                         SND_SOC_DAPM_STREAM_STOP);
 784         }
 785
 786         mutex_unlock(&pcm_mutex);
 787         return 0;
 788 }
 789
 790 /*
 791  * Called by ALSA when the PCM substream is prepared, can set format, sample
 792  * rate, etc.  This function is non atomic and can be called multiple times,
 793  * it can refer to the runtime info.
 794  */
 795 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 796 {
 797         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 798         struct snd_soc_platform *platform = rtd->platform;
 799         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 800         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 801         int ret = 0;
 802
 803         mutex_lock(&pcm_mutex);
 804
 805         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 806                 ret = rtd->dai_link->ops->prepare(substream);
 807                 if (ret < 0) {
 808                         printk(KERN_ERR "asoc: machine prepare error\n");
 809                         goto out;
 810                 }
 811         }
 812
 813         if (platform->driver->ops->prepare) {
 814                 ret = platform->driver->ops->prepare(substream);
 815                 if (ret < 0) {
 816                         printk(KERN_ERR "asoc: platform prepare error\n");
 817                         goto out;
 818                 }
 819         }
 820
 821         if (codec_dai->driver->ops->prepare) {
 822                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 823                 if (ret < 0) {
 824                         printk(KERN_ERR "asoc: codec DAI prepare error\n");
 825                         goto out;
 826                 }
 827         }
 828
 829         if (cpu_dai->driver->ops->prepare) {
 830                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 831                 if (ret < 0) {
 832                         printk(KERN_ERR "asoc: cpu DAI prepare error\n");
 833                         goto out;
 834                 }
 835         }
 836
 837         /* cancel any delayed stream shutdown that is pending */
 838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 839             codec_dai->pop_wait) {
 840                 codec_dai->pop_wait = 0;
 841                 cancel_delayed_work(&rtd->delayed_work);
 842         }
 843
 844         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 845                 snd_soc_dapm_stream_event(rtd,
 846                                           codec_dai->driver->playback.stream_name,
 847                                           SND_SOC_DAPM_STREAM_START);
 848         else
 849                 snd_soc_dapm_stream_event(rtd,
 850                                           codec_dai->driver->capture.stream_name,
 851                                           SND_SOC_DAPM_STREAM_START);
 852
 853         snd_soc_dai_digital_mute(codec_dai, 0);
 854
 855 out:
 856         mutex_unlock(&pcm_mutex);
 857         return ret;
 858 }
 859
 860 /*
 861  * Called by ALSA when the hardware params are set by application. This
 862  * function can also be called multiple times and can allocate buffers
 863  * (using snd_pcm_lib_* ). It's non-atomic.
 864  */
 865 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 866                                 struct snd_pcm_hw_params *params)
 867 {
 868         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 869         struct snd_soc_platform *platform = rtd->platform;
 870         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 871         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 872         int ret = 0;
 873
 874         mutex_lock(&pcm_mutex);
 875
 876         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 877                 ret = rtd->dai_link->ops->hw_params(substream, params);
 878                 if (ret < 0) {
 879                         printk(KERN_ERR "asoc: machine hw_params failed\n");
 880                         goto out;
 881                 }
 882         }
 883
 884         if (codec_dai->driver->ops->hw_params) {
 885                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 886                 if (ret < 0) {
 887                         printk(KERN_ERR "asoc: can't set codec %s hw params\n",
 888                                 codec_dai->name);
 889                         goto codec_err;
 890                 }
 891         }
 892
 893         if (cpu_dai->driver->ops->hw_params) {
 894                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 895                 if (ret < 0) {
 896                         printk(KERN_ERR "asoc: interface %s hw params failed\n",
 897                                 cpu_dai->name);
 898                         goto interface_err;
 899                 }
 900         }
 901
 902         if (platform->driver->ops->hw_params) {
 903                 ret = platform->driver->ops->hw_params(substream, params);
 904                 if (ret < 0) {
 905                         printk(KERN_ERR "asoc: platform %s hw params failed\n",
 906                                 platform->name);
 907                         goto platform_err;
 908                 }
 909         }
 910
 911         rtd->rate = params_rate(params);
 912
 913 out:
 914         mutex_unlock(&pcm_mutex);
 915         return ret;
 916
 917 platform_err:
 918         if (cpu_dai->driver->ops->hw_free)
 919                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 920
 921 interface_err:
 922         if (codec_dai->driver->ops->hw_free)
 923                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 924
 925 codec_err:
 926         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 927                 rtd->dai_link->ops->hw_free(substream);
 928
 929         mutex_unlock(&pcm_mutex);
 930         return ret;
 931 }
 932
 933 /*
 934  * Frees resources allocated by hw_params, can be called multiple times
 935  */
 936 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 937 {
 938         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 939         struct snd_soc_platform *platform = rtd->platform;
 940         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 941         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 942         struct snd_soc_codec *codec = rtd->codec;
 943
 944         mutex_lock(&pcm_mutex);
 945
 946         /* apply codec digital mute */
 947         if (!codec->active)
 948                 snd_soc_dai_digital_mute(codec_dai, 1);
 949
 950         /* free any machine hw params */
 951         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 952                 rtd->dai_link->ops->hw_free(substream);
 953
 954         /* free any DMA resources */
 955         if (platform->driver->ops->hw_free)
 956                 platform->driver->ops->hw_free(substream);
 957
 958         /* now free hw params for the DAIs  */
 959         if (codec_dai->driver->ops->hw_free)
 960                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 961
 962         if (cpu_dai->driver->ops->hw_free)
 963                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 964
 965         mutex_unlock(&pcm_mutex);
 966         return 0;
 967 }
 968
 969 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 970 {
 971         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 972         struct snd_soc_platform *platform = rtd->platform;
 973         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 974         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 975         int ret;
 976
 977         if (codec_dai->driver->ops->trigger) {
 978                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 979                 if (ret < 0)
 980                         return ret;
 981         }
 982
 983         if (platform->driver->ops->trigger) {
 984                 ret = platform->driver->ops->trigger(substream, cmd);
 985                 if (ret < 0)
 986                         return ret;
 987         }
 988
 989         if (cpu_dai->driver->ops->trigger) {
 990                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 991                 if (ret < 0)
 992                         return ret;
 993         }
 994         return 0;
 995 }
 996
 997 /*
 998  * soc level wrapper for pointer callback
 999  * If cpu_dai, codec_dai, platform driver has the delay callback, than
1000  * the runtime->delay will be updated accordingly.
1001  */
1002 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1003 {
1004         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1005         struct snd_soc_platform *platform = rtd->platform;
1006         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1007         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1008         struct snd_pcm_runtime *runtime = substream->runtime;
1009         snd_pcm_uframes_t offset = 0;
1010         snd_pcm_sframes_t delay = 0;
1011
1012         if (platform->driver->ops->pointer)
1013                 offset = platform->driver->ops->pointer(substream);
1014
1015         if (cpu_dai->driver->ops->delay)
1016                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1017
1018         if (codec_dai->driver->ops->delay)
1019                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
1020
1021         if (platform->driver->delay)
1022                 delay += platform->driver->delay(substream, codec_dai);
1023
1024         runtime->delay = delay;
1025
1026         return offset;
1027 }
1028
1029 /* ASoC PCM operations */
1030 static struct snd_pcm_ops soc_pcm_ops = {
1031         .open           = soc_pcm_open,
1032         .close          = soc_codec_close,
1033         .hw_params      = soc_pcm_hw_params,
1034         .hw_free        = soc_pcm_hw_free,
1035         .prepare        = soc_pcm_prepare,
1036         .trigger        = soc_pcm_trigger,
1037         .pointer        = soc_pcm_pointer,
1038 };
1039
1040 #ifdef CONFIG_PM_SLEEP
1041 /* powers down audio subsystem for suspend */
1042 int snd_soc_suspend(struct device *dev)
1043 {
1044         struct snd_soc_card *card = dev_get_drvdata(dev);
1045         struct snd_soc_codec *codec;
1046         int i;
1047
1048         /* If the initialization of this soc device failed, there is no codec
1049          * associated with it. Just bail out in this case.
1050          */
1051         if (list_empty(&card->codec_dev_list))
1052                 return 0;
1053
1054         /* Due to the resume being scheduled into a workqueue we could
1055         * suspend before that's finished - wait for it to complete.
1056          */
1057         snd_power_lock(card->snd_card);
1058         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
1059         snd_power_unlock(card->snd_card);
1060
1061         /* we're going to block userspace touching us until resume completes */
1062         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1063
1064         /* mute any active DACs */
1065         for (i = 0; i < card->num_rtd; i++) {
1066                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1067                 struct snd_soc_dai_driver *drv = dai->driver;
1068
1069                 if (card->rtd[i].dai_link->ignore_suspend)
1070                         continue;
1071
1072                 if (drv->ops->digital_mute && dai->playback_active)
1073                         drv->ops->digital_mute(dai, 1);
1074         }
1075
1076         /* suspend all pcms */
1077         for (i = 0; i < card->num_rtd; i++) {
1078                 if (card->rtd[i].dai_link->ignore_suspend)
1079                         continue;
1080
1081                 snd_pcm_suspend_all(card->rtd[i].pcm);
1082         }
1083
1084         if (card->suspend_pre)
1085                 card->suspend_pre(card);
1086
1087         for (i = 0; i < card->num_rtd; i++) {
1088                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1089                 struct snd_soc_platform *platform = card->rtd[i].platform;
1090
1091                 if (card->rtd[i].dai_link->ignore_suspend)
1092                         continue;
1093
1094                 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
1095                         cpu_dai->driver->suspend(cpu_dai);
1096                 if (platform->driver->suspend && !platform->suspended) {
1097                         platform->driver->suspend(cpu_dai);
1098                         platform->suspended = 1;
1099                 }
1100         }
1101
1102         /* close any waiting streams and save state */
1103         for (i = 0; i < card->num_rtd; i++) {
1104                 flush_delayed_work_sync(&card->rtd[i].delayed_work);
1105                 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1106         }
1107
1108         for (i = 0; i < card->num_rtd; i++) {
1109                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1110
1111                 if (card->rtd[i].dai_link->ignore_suspend)
1112                         continue;
1113
1114                 if (driver->playback.stream_name != NULL)
1115                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1116                                 SND_SOC_DAPM_STREAM_SUSPEND);
1117
1118                 if (driver->capture.stream_name != NULL)
1119                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1120                                 SND_SOC_DAPM_STREAM_SUSPEND);
1121         }
1122
1123         /* suspend all CODECs */
1124         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1125                 /* If there are paths active then the CODEC will be held with
1126                  * bias _ON and should not be suspended. */
1127                 if (!codec->suspended && codec->driver->suspend) {
1128                         switch (codec->dapm.bias_level) {
1129                         case SND_SOC_BIAS_STANDBY:
1130                         case SND_SOC_BIAS_OFF:
1131                                 codec->driver->suspend(codec, PMSG_SUSPEND);
1132                                 codec->suspended = 1;
1133                                 break;
1134                         default:
1135                                 dev_dbg(codec->dev, "CODEC is on over suspend\n");
1136                                 break;
1137                         }
1138                 }
1139         }
1140
1141         for (i = 0; i < card->num_rtd; i++) {
1142                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1143
1144                 if (card->rtd[i].dai_link->ignore_suspend)
1145                         continue;
1146
1147                 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
1148                         cpu_dai->driver->suspend(cpu_dai);
1149         }
1150
1151         if (card->suspend_post)
1152                 card->suspend_post(card);
1153
1154         return 0;
1155 }
1156 EXPORT_SYMBOL_GPL(snd_soc_suspend);
1157
1158 /* deferred resume work, so resume can complete before we finished
1159  * setting our codec back up, which can be very slow on I2C
1160  */
1161 static void soc_resume_deferred(struct work_struct *work)
1162 {
1163         struct snd_soc_card *card =
1164                         container_of(work, struct snd_soc_card, deferred_resume_work);
1165         struct snd_soc_codec *codec;
1166         int i;
1167
1168         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
1169          * so userspace apps are blocked from touching us
1170          */
1171
1172         dev_dbg(card->dev, "starting resume work\n");
1173
1174         /* Bring us up into D2 so that DAPM starts enabling things */
1175         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1176
1177         if (card->resume_pre)
1178                 card->resume_pre(card);
1179
1180         /* resume AC97 DAIs */
1181         for (i = 0; i < card->num_rtd; i++) {
1182                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1183
1184                 if (card->rtd[i].dai_link->ignore_suspend)
1185                         continue;
1186
1187                 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
1188                         cpu_dai->driver->resume(cpu_dai);
1189         }
1190
1191         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1192                 /* If the CODEC was idle over suspend then it will have been
1193                  * left with bias OFF or STANDBY and suspended so we must now
1194                  * resume.  Otherwise the suspend was suppressed.
1195                  */
1196                 if (codec->driver->resume && codec->suspended) {
1197                         switch (codec->dapm.bias_level) {
1198                         case SND_SOC_BIAS_STANDBY:
1199                         case SND_SOC_BIAS_OFF:
1200                                 codec->driver->resume(codec);
1201                                 codec->suspended = 0;
1202                                 break;
1203                         default:
1204                                 dev_dbg(codec->dev, "CODEC was on over suspend\n");
1205                                 break;
1206                         }
1207                 }
1208         }
1209
1210         for (i = 0; i < card->num_rtd; i++) {
1211                 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1212
1213                 if (card->rtd[i].dai_link->ignore_suspend)
1214                         continue;
1215
1216                 if (driver->playback.stream_name != NULL)
1217                         snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
1218                                 SND_SOC_DAPM_STREAM_RESUME);
1219
1220                 if (driver->capture.stream_name != NULL)
1221                         snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
1222                                 SND_SOC_DAPM_STREAM_RESUME);
1223         }
1224
1225         /* unmute any active DACs */
1226         for (i = 0; i < card->num_rtd; i++) {
1227                 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
1228                 struct snd_soc_dai_driver *drv = dai->driver;
1229
1230                 if (card->rtd[i].dai_link->ignore_suspend)
1231                         continue;
1232
1233                 if (drv->ops->digital_mute && dai->playback_active)
1234                         drv->ops->digital_mute(dai, 0);
1235         }
1236
1237         for (i = 0; i < card->num_rtd; i++) {
1238                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1239                 struct snd_soc_platform *platform = card->rtd[i].platform;
1240
1241                 if (card->rtd[i].dai_link->ignore_suspend)
1242                         continue;
1243
1244                 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
1245                         cpu_dai->driver->resume(cpu_dai);
1246                 if (platform->driver->resume && platform->suspended) {
1247                         platform->driver->resume(cpu_dai);
1248                         platform->suspended = 0;
1249                 }
1250         }
1251
1252         if (card->resume_post)
1253                 card->resume_post(card);
1254
1255         dev_dbg(card->dev, "resume work completed\n");
1256
1257         /* userspace can access us now we are back as we were before */
1258         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1259 }
1260
1261 /* powers up audio subsystem after a suspend */
1262 int snd_soc_resume(struct device *dev)
1263 {
1264         struct snd_soc_card *card = dev_get_drvdata(dev);
1265         int i;
1266
1267         /* AC97 devices might have other drivers hanging off them so
1268          * need to resume immediately.  Other drivers don't have that
1269          * problem and may take a substantial amount of time to resume
1270          * due to I/O costs and anti-pop so handle them out of line.
1271          */
1272         for (i = 0; i < card->num_rtd; i++) {
1273                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1274                 if (cpu_dai->driver->ac97_control) {
1275                         dev_dbg(dev, "Resuming AC97 immediately\n");
1276                         soc_resume_deferred(&card->deferred_resume_work);
1277                 } else {
1278                         dev_dbg(dev, "Scheduling resume work\n");
1279                         if (!schedule_work(&card->deferred_resume_work))
1280                                 dev_err(dev, "resume work item may be lost\n");
1281                 }
1282         }
1283
1284         return 0;
1285 }
1286 EXPORT_SYMBOL_GPL(snd_soc_resume);
1287 #else
1288 #define snd_soc_suspend NULL
1289 #define snd_soc_resume NULL
1290 #endif
1291
1292 static struct snd_soc_dai_ops null_dai_ops = {
1293 };
1294
1295 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
1296 {
1297         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1298         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1299         struct snd_soc_codec *codec;
1300         struct snd_soc_platform *platform;
1301         struct snd_soc_dai *codec_dai, *cpu_dai;
1302
1303         if (rtd->complete)
1304                 return 1;
1305         dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1306
1307         /* do we already have the CPU DAI for this link ? */
1308         if (rtd->cpu_dai) {
1309                 goto find_codec;
1310         }
1311         /* no, then find CPU DAI from registered DAIs*/
1312         list_for_each_entry(cpu_dai, &dai_list, list) {
1313                 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
1314
1315                         if (!try_module_get(cpu_dai->dev->driver->owner))
1316                                 return -ENODEV;
1317
1318                         rtd->cpu_dai = cpu_dai;
1319                         goto find_codec;
1320                 }
1321         }
1322         dev_dbg(card->dev, "CPU DAI %s not registered\n",
1323                         dai_link->cpu_dai_name);
1324
1325 find_codec:
1326         /* do we already have the CODEC for this link ? */
1327         if (rtd->codec) {
1328                 goto find_platform;
1329         }
1330
1331         /* no, then find CODEC from registered CODECs*/
1332         list_for_each_entry(codec, &codec_list, list) {
1333                 if (!strcmp(codec->name, dai_link->codec_name)) {
1334                         rtd->codec = codec;
1335
1336                         /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
1337                         list_for_each_entry(codec_dai, &dai_list, list) {
1338                                 if (codec->dev == codec_dai->dev &&
1339                                                 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
1340                                         rtd->codec_dai = codec_dai;
1341                                         goto find_platform;
1342                                 }
1343                         }
1344                         dev_dbg(card->dev, "CODEC DAI %s not registered\n",
1345                                         dai_link->codec_dai_name);
1346
1347                         goto find_platform;
1348                 }
1349         }
1350         dev_dbg(card->dev, "CODEC %s not registered\n",
1351                         dai_link->codec_name);
1352
1353 find_platform:
1354         /* do we already have the CODEC DAI for this link ? */
1355         if (rtd->platform) {
1356                 goto out;
1357         }
1358         /* no, then find CPU DAI from registered DAIs*/
1359         list_for_each_entry(platform, &platform_list, list) {
1360                 if (!strcmp(platform->name, dai_link->platform_name)) {
1361                         rtd->platform = platform;
1362                         goto out;
1363                 }
1364         }
1365
1366         dev_dbg(card->dev, "platform %s not registered\n",
1367                         dai_link->platform_name);
1368         return 0;
1369
1370 out:
1371         /* mark rtd as complete if we found all 4 of our client devices */
1372         if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
1373                 rtd->complete = 1;
1374                 card->num_rtd++;
1375         }
1376         return 1;
1377 }
1378
1379 static void soc_remove_codec(struct snd_soc_codec *codec)
1380 {
1381         int err;
1382
1383         if (codec->driver->remove) {
1384                 err = codec->driver->remove(codec);
1385                 if (err < 0)
1386                         dev_err(codec->dev,
1387                                 "asoc: failed to remove %s: %d\n",
1388                                 codec->name, err);
1389         }
1390
1391         /* Make sure all DAPM widgets are freed */
1392         snd_soc_dapm_free(&codec->dapm);
1393
1394         soc_cleanup_codec_debugfs(codec);
1395         codec->probed = 0;
1396         list_del(&codec->card_list);
1397         module_put(codec->dev->driver->owner);
1398 }
1399
1400 static void soc_remove_dai_link(struct snd_soc_card *card, int num)
1401 {
1402         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1403         struct snd_soc_codec *codec = rtd->codec;
1404         struct snd_soc_platform *platform = rtd->platform;
1405         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1406         int err;
1407
1408         /* unregister the rtd device */
1409         if (rtd->dev_registered) {
1410                 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1411                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1412                 device_unregister(&rtd->dev);
1413                 rtd->dev_registered = 0;
1414         }
1415
1416         /* remove the CODEC DAI */
1417         if (codec_dai && codec_dai->probed) {
1418                 if (codec_dai->driver->remove) {
1419                         err = codec_dai->driver->remove(codec_dai);
1420                         if (err < 0)
1421                                 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1422                 }
1423                 codec_dai->probed = 0;
1424                 list_del(&codec_dai->card_list);
1425         }
1426
1427         /* remove the platform */
1428         if (platform && platform->probed) {
1429                 if (platform->driver->remove) {
1430                         err = platform->driver->remove(platform);
1431                         if (err < 0)
1432                                 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
1433                 }
1434                 platform->probed = 0;
1435                 list_del(&platform->card_list);
1436                 module_put(platform->dev->driver->owner);
1437         }
1438
1439         /* remove the CODEC */
1440         if (codec && codec->probed)
1441                 soc_remove_codec(codec);
1442
1443         /* remove the cpu_dai */
1444         if (cpu_dai && cpu_dai->probed) {
1445                 if (cpu_dai->driver->remove) {
1446                         err = cpu_dai->driver->remove(cpu_dai);
1447                         if (err < 0)
1448                                 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
1449                 }
1450                 cpu_dai->probed = 0;
1451                 list_del(&cpu_dai->card_list);
1452                 module_put(cpu_dai->dev->driver->owner);
1453         }
1454 }
1455
1456 static void soc_set_name_prefix(struct snd_soc_card *card,
1457                                 struct snd_soc_codec *codec)
1458 {
1459         int i;
1460
1461         if (card->codec_conf == NULL)
1462                 return;
1463
1464         for (i = 0; i < card->num_configs; i++) {
1465                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1466                 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1467                         codec->name_prefix = map->name_prefix;
1468                         break;
1469                 }
1470         }
1471 }
1472
1473 static int soc_probe_codec(struct snd_soc_card *card,
1474                            struct snd_soc_codec *codec)
1475 {
1476         int ret = 0;
1477         const struct snd_soc_codec_driver *driver = codec->driver;
1478
1479         codec->card = card;
1480         codec->dapm.card = card;
1481         soc_set_name_prefix(card, codec);
1482
1483         if (!try_module_get(codec->dev->driver->owner))
1484                 return -ENODEV;
1485
1486         if (driver->probe) {
1487                 ret = driver->probe(codec);
1488                 if (ret < 0) {
1489                         dev_err(codec->dev,
1490                                 "asoc: failed to probe CODEC %s: %d\n",
1491                                 codec->name, ret);
1492                         goto err_probe;
1493                 }
1494         }
1495
1496         if (driver->dapm_widgets)
1497                 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1498                                           driver->num_dapm_widgets);
1499         if (driver->dapm_routes)
1500                 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1501                                         driver->num_dapm_routes);
1502
1503         soc_init_codec_debugfs(codec);
1504
1505         /* mark codec as probed and add to card codec list */
1506         codec->probed = 1;
1507         list_add(&codec->card_list, &card->codec_dev_list);
1508         list_add(&codec->dapm.list, &card->dapm_list);
1509
1510         return 0;
1511
1512 err_probe:
1513         module_put(codec->dev->driver->owner);
1514
1515         return ret;
1516 }
1517
1518 static void rtd_release(struct device *dev) {}
1519
1520 static int soc_post_component_init(struct snd_soc_card *card,
1521                                    struct snd_soc_codec *codec,
1522                                    int num, int dailess)
1523 {
1524         struct snd_soc_dai_link *dai_link = NULL;
1525         struct snd_soc_aux_dev *aux_dev = NULL;
1526         struct snd_soc_pcm_runtime *rtd;
1527         const char *temp, *name;
1528         int ret = 0;
1529
1530         if (!dailess) {
1531                 dai_link = &card->dai_link[num];
1532                 rtd = &card->rtd[num];
1533                 name = dai_link->name;
1534         } else {
1535                 aux_dev = &card->aux_dev[num];
1536                 rtd = &card->rtd_aux[num];
1537                 name = aux_dev->name;
1538         }
1539         rtd->card = card;
1540
1541         /* machine controls, routes and widgets are not prefixed */
1542         temp = codec->name_prefix;
1543         codec->name_prefix = NULL;
1544
1545         /* do machine specific initialization */
1546         if (!dailess && dai_link->init)
1547                 ret = dai_link->init(rtd);
1548         else if (dailess && aux_dev->init)
1549                 ret = aux_dev->init(&codec->dapm);
1550         if (ret < 0) {
1551                 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1552                 return ret;
1553         }
1554         codec->name_prefix = temp;
1555
1556         /* Make sure all DAPM widgets are instantiated */
1557         snd_soc_dapm_new_widgets(&codec->dapm);
1558
1559         /* register the rtd device */
1560         rtd->codec = codec;
1561         rtd->dev.parent = card->dev;
1562         rtd->dev.release = rtd_release;
1563         rtd->dev.init_name = name;
1564         ret = device_register(&rtd->dev);
1565         if (ret < 0) {
1566                 dev_err(card->dev,
1567                         "asoc: failed to register runtime device: %d\n", ret);
1568                 return ret;
1569         }
1570         rtd->dev_registered = 1;
1571
1572         /* add DAPM sysfs entries for this codec */
1573         ret = snd_soc_dapm_sys_add(&rtd->dev);
1574         if (ret < 0)
1575                 dev_err(codec->dev,
1576                         "asoc: failed to add codec dapm sysfs entries: %d\n",
1577                         ret);
1578
1579         /* add codec sysfs entries */
1580         ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1581         if (ret < 0)
1582                 dev_err(codec->dev,
1583                         "asoc: failed to add codec sysfs files: %d\n", ret);
1584
1585         return 0;
1586 }
1587
1588 static int soc_probe_dai_link(struct snd_soc_card *card, int num)
1589 {
1590         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1591         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1592         struct snd_soc_codec *codec = rtd->codec;
1593         struct snd_soc_platform *platform = rtd->platform;
1594         struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1595         int ret;
1596
1597         dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
1598
1599         /* config components */
1600         codec_dai->codec = codec;
1601         cpu_dai->platform = platform;
1602         codec_dai->card = card;
1603         cpu_dai->card = card;
1604
1605         /* set default power off timeout */
1606         rtd->pmdown_time = pmdown_time;
1607
1608         /* probe the cpu_dai */
1609         if (!cpu_dai->probed) {
1610                 if (cpu_dai->driver->probe) {
1611                         ret = cpu_dai->driver->probe(cpu_dai);
1612                         if (ret < 0) {
1613                                 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1614                                                 cpu_dai->name);
1615                                 return ret;
1616                         }
1617                 }
1618                 cpu_dai->probed = 1;
1619                 /* mark cpu_dai as probed and add to card cpu_dai list */
1620                 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1621         }
1622
1623         /* probe the CODEC */
1624         if (!codec->probed) {
1625                 ret = soc_probe_codec(card, codec);
1626                 if (ret < 0)
1627                         return ret;
1628         }
1629
1630         /* probe the platform */
1631         if (!platform->probed) {
1632                 if (!try_module_get(platform->dev->driver->owner))
1633                         return -ENODEV;
1634
1635                 if (platform->driver->probe) {
1636                         ret = platform->driver->probe(platform);
1637                         if (ret < 0) {
1638                                 printk(KERN_ERR "asoc: failed to probe platform %s\n",
1639                                                 platform->name);
1640                                 module_put(platform->dev->driver->owner);
1641                                 return ret;
1642                         }
1643                 }
1644                 /* mark platform as probed and add to card platform list */
1645                 platform->probed = 1;
1646                 list_add(&platform->card_list, &card->platform_dev_list);
1647         }
1648
1649         /* probe the CODEC DAI */
1650         if (!codec_dai->probed) {
1651                 if (codec_dai->driver->probe) {
1652                         ret = codec_dai->driver->probe(codec_dai);
1653                         if (ret < 0) {
1654                                 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1655                                                 codec_dai->name);
1656                                 return ret;
1657                         }
1658                 }
1659
1660                 /* mark cpu_dai as probed and add to card cpu_dai list */
1661                 codec_dai->probed = 1;
1662                 list_add(&codec_dai->card_list, &card->dai_dev_list);
1663         }
1664
1665         /* DAPM dai link stream work */
1666         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
1667
1668         ret = soc_post_component_init(card, codec, num, 0);
1669         if (ret)
1670                 return ret;
1671
1672         ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1673         if (ret < 0)
1674                 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1675
1676         /* create the pcm */
1677         ret = soc_new_pcm(rtd, num);
1678         if (ret < 0) {
1679                 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1680                 return ret;
1681         }
1682
1683         /* add platform data for AC97 devices */
1684         if (rtd->codec_dai->driver->ac97_control)
1685                 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1686
1687         return 0;
1688 }
1689
1690 #ifdef CONFIG_SND_SOC_AC97_BUS
1691 static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1692 {
1693         int ret;
1694
1695         /* Only instantiate AC97 if not already done by the adaptor
1696          * for the generic AC97 subsystem.
1697          */
1698         if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1699                 /*
1700                  * It is possible that the AC97 device is already registered to
1701                  * the device subsystem. This happens when the device is created
1702                  * via snd_ac97_mixer(). Currently only SoC codec that does so
1703                  * is the generic AC97 glue but others migh emerge.
1704                  *
1705                  * In those cases we don't try to register the device again.
1706                  */
1707                 if (!rtd->codec->ac97_created)
1708                         return 0;
1709
1710                 ret = soc_ac97_dev_register(rtd->codec);
1711                 if (ret < 0) {
1712                         printk(KERN_ERR "asoc: AC97 device register failed\n");
1713                         return ret;
1714                 }
1715
1716                 rtd->codec->ac97_registered = 1;
1717         }
1718         return 0;
1719 }
1720
1721 static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1722 {
1723         if (codec->ac97_registered) {
1724                 soc_ac97_dev_unregister(codec);
1725                 codec->ac97_registered = 0;
1726         }
1727 }
1728 #endif
1729
1730 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1731 {
1732         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1733         struct snd_soc_codec *codec;
1734         int ret = -ENODEV;
1735
1736         /* find CODEC from registered CODECs*/
1737         list_for_each_entry(codec, &codec_list, list) {
1738                 if (!strcmp(codec->name, aux_dev->codec_name)) {
1739                         if (codec->probed) {
1740                                 dev_err(codec->dev,
1741                                         "asoc: codec already probed");
1742                                 ret = -EBUSY;
1743                                 goto out;
1744                         }
1745                         goto found;
1746                 }
1747         }
1748         /* codec not found */
1749         dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1750         goto out;
1751
1752 found:
1753         ret = soc_probe_codec(card, codec);
1754         if (ret < 0)
1755                 return ret;
1756
1757         ret = soc_post_component_init(card, codec, num, 1);
1758
1759 out:
1760         return ret;
1761 }
1762
1763 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1764 {
1765         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1766         struct snd_soc_codec *codec = rtd->codec;
1767
1768         /* unregister the rtd device */
1769         if (rtd->dev_registered) {
1770                 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1771                 device_unregister(&rtd->dev);
1772                 rtd->dev_registered = 0;
1773         }
1774
1775         if (codec && codec->probed)
1776                 soc_remove_codec(codec);
1777 }
1778
1779 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1780                                     enum snd_soc_compress_type compress_type)
1781 {
1782         int ret;
1783
1784         if (codec->cache_init)
1785                 return 0;
1786
1787         /* override the compress_type if necessary */
1788         if (compress_type && codec->compress_type != compress_type)
1789                 codec->compress_type = compress_type;
1790         ret = snd_soc_cache_init(codec);
1791         if (ret < 0) {
1792                 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1793                         ret);
1794                 return ret;
1795         }
1796         codec->cache_init = 1;
1797         return 0;
1798 }
1799
1800 static void snd_soc_instantiate_card(struct snd_soc_card *card)
1801 {
1802         struct snd_soc_codec *codec;
1803         struct snd_soc_codec_conf *codec_conf;
1804         enum snd_soc_compress_type compress_type;
1805         int ret, i;
1806
1807         mutex_lock(&card->mutex);
1808
1809         if (card->instantiated) {
1810                 mutex_unlock(&card->mutex);
1811                 return;
1812         }
1813
1814         /* bind DAIs */
1815         for (i = 0; i < card->num_links; i++)
1816                 soc_bind_dai_link(card, i);
1817
1818         /* bind completed ? */
1819         if (card->num_rtd != card->num_links) {
1820                 mutex_unlock(&card->mutex);
1821                 return;
1822         }
1823
1824         /* initialize the register cache for each available codec */
1825         list_for_each_entry(codec, &codec_list, list) {
1826                 if (codec->cache_init)
1827                         continue;
1828                 /* by default we don't override the compress_type */
1829                 compress_type = 0;
1830                 /* check to see if we need to override the compress_type */
1831                 for (i = 0; i < card->num_configs; ++i) {
1832                         codec_conf = &card->codec_conf[i];
1833                         if (!strcmp(codec->name, codec_conf->dev_name)) {
1834                                 compress_type = codec_conf->compress_type;
1835                                 if (compress_type && compress_type
1836                                     != codec->compress_type)
1837                                         break;
1838                         }
1839                 }
1840                 ret = snd_soc_init_codec_cache(codec, compress_type);
1841                 if (ret < 0) {
1842                         mutex_unlock(&card->mutex);
1843                         return;
1844                 }
1845         }
1846
1847         /* card bind complete so register a sound card */
1848         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1849                         card->owner, 0, &card->snd_card);
1850         if (ret < 0) {
1851                 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1852                         card->name);
1853                 mutex_unlock(&card->mutex);
1854                 return;
1855         }
1856         card->snd_card->dev = card->dev;
1857
1858         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1859         card->dapm.dev = card->dev;
1860         card->dapm.card = card;
1861         list_add(&card->dapm.list, &card->dapm_list);
1862
1863 #ifdef CONFIG_PM_SLEEP
1864         /* deferred resume work */
1865         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1866 #endif
1867
1868         /* initialise the sound card only once */
1869         if (card->probe) {
1870                 ret = card->probe(card);
1871                 if (ret < 0)
1872                         goto card_probe_error;
1873         }
1874
1875         for (i = 0; i < card->num_links; i++) {
1876                 ret = soc_probe_dai_link(card, i);
1877                 if (ret < 0) {
1878                         pr_err("asoc: failed to instantiate card %s: %d\n",
1879                                card->name, ret);
1880                         goto probe_dai_err;
1881                 }
1882         }
1883
1884         for (i = 0; i < card->num_aux_devs; i++) {
1885                 ret = soc_probe_aux_dev(card, i);
1886                 if (ret < 0) {
1887                         pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1888                                card->name, ret);
1889                         goto probe_aux_dev_err;
1890                 }
1891         }
1892
1893         if (card->dapm_widgets)
1894                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1895                                           card->num_dapm_widgets);
1896         if (card->dapm_routes)
1897                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1898                                         card->num_dapm_routes);
1899
1900 #ifdef CONFIG_DEBUG_FS
1901         card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
1902                                                      card->debugfs_card_root);
1903         if (!card->dapm.debugfs_dapm)
1904                 printk(KERN_WARNING
1905                        "Failed to create card DAPM debugfs directory\n");
1906
1907         snd_soc_dapm_debugfs_init(&card->dapm);
1908 #endif
1909
1910         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1911                  "%s",  card->name);
1912         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1913                  "%s", card->name);
1914
1915         if (card->late_probe) {
1916                 ret = card->late_probe(card);
1917                 if (ret < 0) {
1918                         dev_err(card->dev, "%s late_probe() failed: %d\n",
1919                                 card->name, ret);
1920                         goto probe_aux_dev_err;
1921                 }
1922         }
1923
1924         ret = snd_card_register(card->snd_card);
1925         if (ret < 0) {
1926                 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1927                 goto probe_aux_dev_err;
1928         }
1929
1930 #ifdef CONFIG_SND_SOC_AC97_BUS
1931         /* register any AC97 codecs */
1932         for (i = 0; i < card->num_rtd; i++) {
1933                 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1934                 if (ret < 0) {
1935                         printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1936                         while (--i >= 0)
1937                                 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1938                         goto probe_aux_dev_err;
1939                 }
1940         }
1941 #endif
1942
1943         card->instantiated = 1;
1944         mutex_unlock(&card->mutex);
1945         return;
1946
1947 probe_aux_dev_err:
1948         for (i = 0; i < card->num_aux_devs; i++)
1949                 soc_remove_aux_dev(card, i);
1950
1951 probe_dai_err:
1952         for (i = 0; i < card->num_links; i++)
1953                 soc_remove_dai_link(card, i);
1954
1955 card_probe_error:
1956         if (card->remove)
1957                 card->remove(card);
1958
1959         snd_card_free(card->snd_card);
1960
1961         mutex_unlock(&card->mutex);
1962 }
1963
1964 /*
1965  * Attempt to initialise any uninitialised cards.  Must be called with
1966  * client_mutex.
1967  */
1968 static void snd_soc_instantiate_cards(void)
1969 {
1970         struct snd_soc_card *card;
1971         list_for_each_entry(card, &card_list, list)
1972                 snd_soc_instantiate_card(card);
1973 }
1974
1975 /* probes a new socdev */
1976 static int soc_probe(struct platform_device *pdev)
1977 {
1978         struct snd_soc_card *card = platform_get_drvdata(pdev);
1979         int ret = 0;
1980
1981         /*
1982          * no card, so machine driver should be registering card
1983          * we should not be here in that case so ret error
1984          */
1985         if (!card)
1986                 return -EINVAL;
1987
1988         /* Bodge while we unpick instantiation */
1989         card->dev = &pdev->dev;
1990
1991         ret = snd_soc_register_card(card);
1992         if (ret != 0) {
1993                 dev_err(&pdev->dev, "Failed to register card\n");
1994                 return ret;
1995         }
1996
1997         return 0;
1998 }
1999
2000 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2001 {
2002         int i;
2003
2004         /* make sure any delayed work runs */
2005         for (i = 0; i < card->num_rtd; i++) {
2006                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2007                 flush_delayed_work_sync(&rtd->delayed_work);
2008         }
2009
2010         /* remove auxiliary devices */
2011         for (i = 0; i < card->num_aux_devs; i++)
2012                 soc_remove_aux_dev(card, i);
2013
2014         /* remove and free each DAI */
2015         for (i = 0; i < card->num_rtd; i++)
2016                 soc_remove_dai_link(card, i);
2017
2018         soc_cleanup_card_debugfs(card);
2019
2020         /* remove the card */
2021         if (card->remove)
2022                 card->remove(card);
2023
2024         kfree(card->rtd);
2025         snd_card_free(card->snd_card);
2026         return 0;
2027
2028 }
2029
2030 /* removes a socdev */
2031 static int soc_remove(struct platform_device *pdev)
2032 {
2033         struct snd_soc_card *card = platform_get_drvdata(pdev);
2034
2035         snd_soc_unregister_card(card);
2036         return 0;
2037 }
2038
2039 int snd_soc_poweroff(struct device *dev)
2040 {
2041         struct snd_soc_card *card = dev_get_drvdata(dev);
2042         int i;
2043
2044         if (!card->instantiated)
2045                 return 0;
2046
2047         /* Flush out pmdown_time work - we actually do want to run it
2048          * now, we're shutting down so no imminent restart. */
2049         for (i = 0; i < card->num_rtd; i++) {
2050                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2051                 flush_delayed_work_sync(&rtd->delayed_work);
2052         }
2053
2054         snd_soc_dapm_shutdown(card);
2055
2056         return 0;
2057 }
2058 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2059
2060 const struct dev_pm_ops snd_soc_pm_ops = {
2061         .suspend = snd_soc_suspend,
2062         .resume = snd_soc_resume,
2063         .poweroff = snd_soc_poweroff,
2064 };
2065 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2066
2067 /* ASoC platform driver */
2068 static struct platform_driver soc_driver = {
2069         .driver         = {
2070                 .name           = "soc-audio",
2071                 .owner          = THIS_MODULE,
2072                 .pm             = &snd_soc_pm_ops,
2073         },
2074         .probe          = soc_probe,
2075         .remove         = soc_remove,
2076 };
2077
2078 /* create a new pcm */
2079 static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2080 {
2081         struct snd_soc_codec *codec = rtd->codec;
2082         struct snd_soc_platform *platform = rtd->platform;
2083         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2084         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2085         struct snd_pcm *pcm;
2086         char new_name[64];
2087         int ret = 0, playback = 0, capture = 0;
2088
2089         /* check client and interface hw capabilities */
2090         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2091                         rtd->dai_link->stream_name, codec_dai->name, num);
2092
2093         if (codec_dai->driver->playback.channels_min)
2094                 playback = 1;
2095         if (codec_dai->driver->capture.channels_min)
2096                 capture = 1;
2097
2098         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
2099         ret = snd_pcm_new(rtd->card->snd_card, new_name,
2100                         num, playback, capture, &pcm);
2101         if (ret < 0) {
2102                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2103                 return ret;
2104         }
2105
2106         rtd->pcm = pcm;
2107         pcm->private_data = rtd;
2108         soc_pcm_ops.mmap = platform->driver->ops->mmap;
2109         soc_pcm_ops.pointer = platform->driver->ops->pointer;
2110         soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
2111         soc_pcm_ops.copy = platform->driver->ops->copy;
2112         soc_pcm_ops.silence = platform->driver->ops->silence;
2113         soc_pcm_ops.ack = platform->driver->ops->ack;
2114         soc_pcm_ops.page = platform->driver->ops->page;
2115
2116         if (playback)
2117                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
2118
2119         if (capture)
2120                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
2121
2122         ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
2123         if (ret < 0) {
2124                 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
2125                 return ret;
2126         }
2127
2128         pcm->private_free = platform->driver->pcm_free;
2129         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2130                 cpu_dai->name);
2131         return ret;
2132 }
2133
2134 /**
2135  * snd_soc_codec_volatile_register: Report if a register is volatile.
2136  *
2137  * @codec: CODEC to query.
2138  * @reg: Register to query.
2139  *
2140  * Boolean function indiciating if a CODEC register is volatile.
2141  */
2142 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
2143                                     unsigned int reg)
2144 {
2145         if (codec->volatile_register)
2146                 return codec->volatile_register(codec, reg);
2147         else
2148                 return 0;
2149 }
2150 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
2151
2152 /**
2153  * snd_soc_new_ac97_codec - initailise AC97 device
2154  * @codec: audio codec
2155  * @ops: AC97 bus operations
2156  * @num: AC97 codec number
2157  *
2158  * Initialises AC97 codec resources for use by ad-hoc devices only.
2159  */
2160 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2161         struct snd_ac97_bus_ops *ops, int num)
2162 {
2163         mutex_lock(&codec->mutex);
2164
2165         codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2166         if (codec->ac97 == NULL) {
2167                 mutex_unlock(&codec->mutex);
2168                 return -ENOMEM;
2169         }
2170
2171         codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2172         if (codec->ac97->bus == NULL) {
2173                 kfree(codec->ac97);
2174                 codec->ac97 = NULL;
2175                 mutex_unlock(&codec->mutex);
2176                 return -ENOMEM;
2177         }
2178
2179         codec->ac97->bus->ops = ops;
2180         codec->ac97->num = num;
2181
2182         /*
2183          * Mark the AC97 device to be created by us. This way we ensure that the
2184          * device will be registered with the device subsystem later on.
2185          */
2186         codec->ac97_created = 1;
2187
2188         mutex_unlock(&codec->mutex);
2189         return 0;
2190 }
2191 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2192
2193 /**
2194  * snd_soc_free_ac97_codec - free AC97 codec device
2195  * @codec: audio codec
2196  *
2197  * Frees AC97 codec device resources.
2198  */
2199 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2200 {
2201         mutex_lock(&codec->mutex);
2202 #ifdef CONFIG_SND_SOC_AC97_BUS
2203         soc_unregister_ac97_dai_link(codec);
2204 #endif
2205         kfree(codec->ac97->bus);
2206         kfree(codec->ac97);
2207         codec->ac97 = NULL;
2208         codec->ac97_created = 0;
2209         mutex_unlock(&codec->mutex);
2210 }
2211 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2212
2213 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2214 {
2215         unsigned int ret;
2216
2217         ret = codec->read(codec, reg);
2218         dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2219         trace_snd_soc_reg_read(codec, reg, ret);
2220
2221         return ret;
2222 }
2223 EXPORT_SYMBOL_GPL(snd_soc_read);
2224
2225 unsigned int snd_soc_write(struct snd_soc_codec *codec,
2226                            unsigned int reg, unsigned int val)
2227 {
2228         dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2229         trace_snd_soc_reg_write(codec, reg, val);
2230         return codec->write(codec, reg, val);
2231 }
2232 EXPORT_SYMBOL_GPL(snd_soc_write);
2233
2234 /**
2235  * snd_soc_update_bits - update codec register bits
2236  * @codec: audio codec
2237  * @reg: codec register
2238  * @mask: register mask
2239  * @value: new value
2240  *
2241  * Writes new register value.
2242  *
2243  * Returns 1 for change, 0 for no change, or negative error code.
2244  */
2245 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2246                                 unsigned int mask, unsigned int value)
2247 {
2248         int change;
2249         unsigned int old, new;
2250         int ret;
2251
2252         ret = snd_soc_read(codec, reg);
2253         if (ret < 0)
2254                 return ret;
2255
2256         old = ret;
2257         new = (old & ~mask) | value;
2258         change = old != new;
2259         if (change) {
2260                 ret = snd_soc_write(codec, reg, new);
2261                 if (ret < 0)
2262                         return ret;
2263         }
2264
2265         return change;
2266 }
2267 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2268
2269 /**
2270  * snd_soc_update_bits_locked - update codec register bits
2271  * @codec: audio codec
2272  * @reg: codec register
2273  * @mask: register mask
2274  * @value: new value
2275  *
2276  * Writes new register value, and takes the codec mutex.
2277  *
2278  * Returns 1 for change else 0.
2279  */
2280 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2281                                unsigned short reg, unsigned int mask,
2282                                unsigned int value)
2283 {
2284         int change;
2285
2286         mutex_lock(&codec->mutex);
2287         change = snd_soc_update_bits(codec, reg, mask, value);
2288         mutex_unlock(&codec->mutex);
2289
2290         return change;
2291 }
2292 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2293
2294 /**
2295  * snd_soc_test_bits - test register for change
2296  * @codec: audio codec
2297  * @reg: codec register
2298  * @mask: register mask
2299  * @value: new value
2300  *
2301  * Tests a register with a new value and checks if the new value is
2302  * different from the old value.
2303  *
2304  * Returns 1 for change else 0.
2305  */
2306 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2307                                 unsigned int mask, unsigned int value)
2308 {
2309         int change;
2310         unsigned int old, new;
2311
2312         old = snd_soc_read(codec, reg);
2313         new = (old & ~mask) | value;
2314         change = old != new;
2315
2316         return change;
2317 }
2318 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2319
2320 /**
2321  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2322  * @substream: the pcm substream
2323  * @hw: the hardware parameters
2324  *
2325  * Sets the substream runtime hardware parameters.
2326  */
2327 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2328         const struct snd_pcm_hardware *hw)
2329 {
2330         struct snd_pcm_runtime *runtime = substream->runtime;
2331         runtime->hw.info = hw->info;
2332         runtime->hw.formats = hw->formats;
2333         runtime->hw.period_bytes_min = hw->period_bytes_min;
2334         runtime->hw.period_bytes_max = hw->period_bytes_max;
2335         runtime->hw.periods_min = hw->periods_min;
2336         runtime->hw.periods_max = hw->periods_max;
2337         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2338         runtime->hw.fifo_size = hw->fifo_size;
2339         return 0;
2340 }
2341 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2342
2343 /**
2344  * snd_soc_cnew - create new control
2345  * @_template: control template
2346  * @data: control private data
2347  * @long_name: control long name
2348  * @prefix: control name prefix
2349  *
2350  * Create a new mixer control from a template control.
2351  *
2352  * Returns 0 for success, else error.
2353  */
2354 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2355                                   void *data, char *long_name,
2356                                   const char *prefix)
2357 {
2358         struct snd_kcontrol_new template;
2359         struct snd_kcontrol *kcontrol;
2360         char *name = NULL;
2361         int name_len;
2362
2363         memcpy(&template, _template, sizeof(template));
2364         template.index = 0;
2365
2366         if (!long_name)
2367                 long_name = template.name;
2368
2369         if (prefix) {
2370                 name_len = strlen(long_name) + strlen(prefix) + 2;
2371                 name = kmalloc(name_len, GFP_ATOMIC);
2372                 if (!name)
2373                         return NULL;
2374
2375                 snprintf(name, name_len, "%s %s", prefix, long_name);
2376
2377                 template.name = name;
2378         } else {
2379                 template.name = long_name;
2380         }
2381
2382         kcontrol = snd_ctl_new1(&template, data);
2383
2384         kfree(name);
2385
2386         return kcontrol;
2387 }
2388 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2389
2390 /**
2391  * snd_soc_add_controls - add an array of controls to a codec.
2392  * Convienience function to add a list of controls. Many codecs were
2393  * duplicating this code.
2394  *
2395  * @codec: codec to add controls to
2396  * @controls: array of controls to add
2397  * @num_controls: number of elements in the array
2398  *
2399  * Return 0 for success, else error.
2400  */
2401 int snd_soc_add_controls(struct snd_soc_codec *codec,
2402         const struct snd_kcontrol_new *controls, int num_controls)
2403 {
2404         struct snd_card *card = codec->card->snd_card;
2405         int err, i;
2406
2407         for (i = 0; i < num_controls; i++) {
2408                 const struct snd_kcontrol_new *control = &controls[i];
2409                 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
2410                                                      control->name,
2411                                                      codec->name_prefix));
2412                 if (err < 0) {
2413                         dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2414                                 codec->name, control->name, err);
2415                         return err;
2416                 }
2417         }
2418
2419         return 0;
2420 }
2421 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
2422
2423 /**
2424  * snd_soc_info_enum_double - enumerated double mixer info callback
2425  * @kcontrol: mixer control
2426  * @uinfo: control element information
2427  *
2428  * Callback to provide information about a double enumerated
2429  * mixer control.
2430  *
2431  * Returns 0 for success.
2432  */
2433 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2434         struct snd_ctl_elem_info *uinfo)
2435 {
2436         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2437
2438         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2439         uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2440         uinfo->value.enumerated.items = e->max;
2441
2442         if (uinfo->value.enumerated.item > e->max - 1)
2443                 uinfo->value.enumerated.item = e->max - 1;
2444         strcpy(uinfo->value.enumerated.name,
2445                 e->texts[uinfo->value.enumerated.item]);
2446         return 0;
2447 }
2448 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2449
2450 /**
2451  * snd_soc_get_enum_double - enumerated double mixer get callback
2452  * @kcontrol: mixer control
2453  * @ucontrol: control element information
2454  *
2455  * Callback to get the value of a double enumerated mixer.
2456  *
2457  * Returns 0 for success.
2458  */
2459 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2460         struct snd_ctl_elem_value *ucontrol)
2461 {
2462         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2463         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2464         unsigned int val, bitmask;
2465
2466         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2467                 ;
2468         val = snd_soc_read(codec, e->reg);
2469         ucontrol->value.enumerated.item[0]
2470                 = (val >> e->shift_l) & (bitmask - 1);
2471         if (e->shift_l != e->shift_r)
2472                 ucontrol->value.enumerated.item[1] =
2473                         (val >> e->shift_r) & (bitmask - 1);
2474
2475         return 0;
2476 }
2477 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2478
2479 /**
2480  * snd_soc_put_enum_double - enumerated double mixer put callback
2481  * @kcontrol: mixer control
2482  * @ucontrol: control element information
2483  *
2484  * Callback to set the value of a double enumerated mixer.
2485  *
2486  * Returns 0 for success.
2487  */
2488 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2489         struct snd_ctl_elem_value *ucontrol)
2490 {
2491         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2492         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2493         unsigned int val;
2494         unsigned int mask, bitmask;
2495
2496         for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2497                 ;
2498         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2499                 return -EINVAL;
2500         val = ucontrol->value.enumerated.item[0] << e->shift_l;
2501         mask = (bitmask - 1) << e->shift_l;
2502         if (e->shift_l != e->shift_r) {
2503                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2504                         return -EINVAL;
2505                 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2506                 mask |= (bitmask - 1) << e->shift_r;
2507         }
2508
2509         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2510 }
2511 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2512
2513 /**
2514  * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2515  * @kcontrol: mixer control
2516  * @ucontrol: control element information
2517  *
2518  * Callback to get the value of a double semi enumerated mixer.
2519  *
2520  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2521  * used for handling bitfield coded enumeration for example.
2522  *
2523  * Returns 0 for success.
2524  */
2525 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2526         struct snd_ctl_elem_value *ucontrol)
2527 {
2528         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2529         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2530         unsigned int reg_val, val, mux;
2531
2532         reg_val = snd_soc_read(codec, e->reg);
2533         val = (reg_val >> e->shift_l) & e->mask;
2534         for (mux = 0; mux < e->max; mux++) {
2535                 if (val == e->values[mux])
2536                         break;
2537         }
2538         ucontrol->value.enumerated.item[0] = mux;
2539         if (e->shift_l != e->shift_r) {
2540                 val = (reg_val >> e->shift_r) & e->mask;
2541                 for (mux = 0; mux < e->max; mux++) {
2542                         if (val == e->values[mux])
2543                                 break;
2544                 }
2545                 ucontrol->value.enumerated.item[1] = mux;
2546         }
2547
2548         return 0;
2549 }
2550 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2551
2552 /**
2553  * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2554  * @kcontrol: mixer control
2555  * @ucontrol: control element information
2556  *
2557  * Callback to set the value of a double semi enumerated mixer.
2558  *
2559  * Semi enumerated mixer: the enumerated items are referred as values. Can be
2560  * used for handling bitfield coded enumeration for example.
2561  *
2562  * Returns 0 for success.
2563  */
2564 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2565         struct snd_ctl_elem_value *ucontrol)
2566 {
2567         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2568         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2569         unsigned int val;
2570         unsigned int mask;
2571
2572         if (ucontrol->value.enumerated.item[0] > e->max - 1)
2573                 return -EINVAL;
2574         val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2575         mask = e->mask << e->shift_l;
2576         if (e->shift_l != e->shift_r) {
2577                 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2578                         return -EINVAL;
2579                 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2580                 mask |= e->mask << e->shift_r;
2581         }
2582
2583         return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2584 }
2585 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2586
2587 /**
2588  * snd_soc_info_enum_ext - external enumerated single mixer info callback
2589  * @kcontrol: mixer control
2590  * @uinfo: control element information
2591  *
2592  * Callback to provide information about an external enumerated
2593  * single mixer.
2594  *
2595  * Returns 0 for success.
2596  */
2597 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2598         struct snd_ctl_elem_info *uinfo)
2599 {
2600         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2601
2602         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2603         uinfo->count = 1;
2604         uinfo->value.enumerated.items = e->max;
2605
2606         if (uinfo->value.enumerated.item > e->max - 1)
2607                 uinfo->value.enumerated.item = e->max - 1;
2608         strcpy(uinfo->value.enumerated.name,
2609                 e->texts[uinfo->value.enumerated.item]);
2610         return 0;
2611 }
2612 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2613
2614 /**
2615  * snd_soc_info_volsw_ext - external single mixer info callback
2616  * @kcontrol: mixer control
2617  * @uinfo: control element information
2618  *
2619  * Callback to provide information about a single external mixer control.
2620  *
2621  * Returns 0 for success.
2622  */
2623 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2624         struct snd_ctl_elem_info *uinfo)
2625 {
2626         int max = kcontrol->private_value;
2627
2628         if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2629                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2630         else
2631                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2632
2633         uinfo->count = 1;
2634         uinfo->value.integer.min = 0;
2635         uinfo->value.integer.max = max;
2636         return 0;
2637 }
2638 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2639
2640 /**
2641  * snd_soc_info_volsw - single mixer info callback
2642  * @kcontrol: mixer control
2643  * @uinfo: control element information
2644  *
2645  * Callback to provide information about a single mixer control.
2646  *
2647  * Returns 0 for success.
2648  */
2649 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2650         struct snd_ctl_elem_info *uinfo)
2651 {
2652         struct soc_mixer_control *mc =
2653                 (struct soc_mixer_control *)kcontrol->private_value;
2654         int platform_max;
2655         unsigned int shift = mc->shift;
2656         unsigned int rshift = mc->rshift;
2657
2658         if (!mc->platform_max)
2659                 mc->platform_max = mc->max;
2660         platform_max = mc->platform_max;
2661
2662         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2663                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2664         else
2665                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2666
2667         uinfo->count = shift == rshift ? 1 : 2;
2668         uinfo->value.integer.min = 0;
2669         uinfo->value.integer.max = platform_max;
2670         return 0;
2671 }
2672 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2673
2674 /**
2675  * snd_soc_get_volsw - single mixer get callback
2676  * @kcontrol: mixer control
2677  * @ucontrol: control element information
2678  *
2679  * Callback to get the value of a single mixer control.
2680  *
2681  * Returns 0 for success.
2682  */
2683 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2684         struct snd_ctl_elem_value *ucontrol)
2685 {
2686         struct soc_mixer_control *mc =
2687                 (struct soc_mixer_control *)kcontrol->private_value;
2688         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2689         unsigned int reg = mc->reg;
2690         unsigned int shift = mc->shift;
2691         unsigned int rshift = mc->rshift;
2692         int max = mc->max;
2693         unsigned int mask = (1 << fls(max)) - 1;
2694         unsigned int invert = mc->invert;
2695
2696         ucontrol->value.integer.value[0] =
2697                 (snd_soc_read(codec, reg) >> shift) & mask;
2698         if (shift != rshift)
2699                 ucontrol->value.integer.value[1] =
2700                         (snd_soc_read(codec, reg) >> rshift) & mask;
2701         if (invert) {
2702                 ucontrol->value.integer.value[0] =
2703                         max - ucontrol->value.integer.value[0];
2704                 if (shift != rshift)
2705                         ucontrol->value.integer.value[1] =
2706                                 max - ucontrol->value.integer.value[1];
2707         }
2708
2709         return 0;
2710 }
2711 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2712
2713 /**
2714  * snd_soc_put_volsw - single mixer put callback
2715  * @kcontrol: mixer control
2716  * @ucontrol: control element information
2717  *
2718  * Callback to set the value of a single mixer control.
2719  *
2720  * Returns 0 for success.
2721  */
2722 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2723         struct snd_ctl_elem_value *ucontrol)
2724 {
2725         struct soc_mixer_control *mc =
2726                 (struct soc_mixer_control *)kcontrol->private_value;
2727         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2728         unsigned int reg = mc->reg;
2729         unsigned int shift = mc->shift;
2730         unsigned int rshift = mc->rshift;
2731         int max = mc->max;
2732         unsigned int mask = (1 << fls(max)) - 1;
2733         unsigned int invert = mc->invert;
2734         unsigned int val, val2, val_mask;
2735
2736         val = (ucontrol->value.integer.value[0] & mask);
2737         if (invert)
2738                 val = max - val;
2739         val_mask = mask << shift;
2740         val = val << shift;
2741         if (shift != rshift) {
2742                 val2 = (ucontrol->value.integer.value[1] & mask);
2743                 if (invert)
2744                         val2 = max - val2;
2745                 val_mask |= mask << rshift;
2746                 val |= val2 << rshift;
2747         }
2748         return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2749 }
2750 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2751
2752 /**
2753  * snd_soc_info_volsw_2r - double mixer info callback
2754  * @kcontrol: mixer control
2755  * @uinfo: control element information
2756  *
2757  * Callback to provide information about a double mixer control that
2758  * spans 2 codec registers.
2759  *
2760  * Returns 0 for success.
2761  */
2762 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2763         struct snd_ctl_elem_info *uinfo)
2764 {
2765         struct soc_mixer_control *mc =
2766                 (struct soc_mixer_control *)kcontrol->private_value;
2767         int platform_max;
2768
2769         if (!mc->platform_max)
2770                 mc->platform_max = mc->max;
2771         platform_max = mc->platform_max;
2772
2773         if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2774                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2775         else
2776                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2777
2778         uinfo->count = 2;
2779         uinfo->value.integer.min = 0;
2780         uinfo->value.integer.max = platform_max;
2781         return 0;
2782 }
2783 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2784
2785 /**
2786  * snd_soc_get_volsw_2r - double mixer get callback
2787  * @kcontrol: mixer control
2788  * @ucontrol: control element information
2789  *
2790  * Callback to get the value of a double mixer control that spans 2 registers.
2791  *
2792  * Returns 0 for success.
2793  */
2794 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2795         struct snd_ctl_elem_value *ucontrol)
2796 {
2797         struct soc_mixer_control *mc =
2798                 (struct soc_mixer_control *)kcontrol->private_value;
2799         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2800         unsigned int reg = mc->reg;
2801         unsigned int reg2 = mc->rreg;
2802         unsigned int shift = mc->shift;
2803         int max = mc->max;
2804         unsigned int mask = (1 << fls(max)) - 1;
2805         unsigned int invert = mc->invert;
2806
2807         ucontrol->value.integer.value[0] =
2808                 (snd_soc_read(codec, reg) >> shift) & mask;
2809         ucontrol->value.integer.value[1] =
2810                 (snd_soc_read(codec, reg2) >> shift) & mask;
2811         if (invert) {
2812                 ucontrol->value.integer.value[0] =
2813                         max - ucontrol->value.integer.value[0];
2814                 ucontrol->value.integer.value[1] =
2815                         max - ucontrol->value.integer.value[1];
2816         }
2817
2818         return 0;
2819 }
2820 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2821
2822 /**
2823  * snd_soc_put_volsw_2r - double mixer set callback
2824  * @kcontrol: mixer control
2825  * @ucontrol: control element information
2826  *
2827  * Callback to set the value of a double mixer control that spans 2 registers.
2828  *
2829  * Returns 0 for success.
2830  */
2831 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2832         struct snd_ctl_elem_value *ucontrol)
2833 {
2834         struct soc_mixer_control *mc =
2835                 (struct soc_mixer_control *)kcontrol->private_value;
2836         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2837         unsigned int reg = mc->reg;
2838         unsigned int reg2 = mc->rreg;
2839         unsigned int shift = mc->shift;
2840         int max = mc->max;
2841         unsigned int mask = (1 << fls(max)) - 1;
2842         unsigned int invert = mc->invert;
2843         int err;
2844         unsigned int val, val2, val_mask;
2845
2846         val_mask = mask << shift;
2847         val = (ucontrol->value.integer.value[0] & mask);
2848         val2 = (ucontrol->value.integer.value[1] & mask);
2849
2850         if (invert) {
2851                 val = max - val;
2852                 val2 = max - val2;
2853         }
2854
2855         val = val << shift;
2856         val2 = val2 << shift;
2857
2858         err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2859         if (err < 0)
2860                 return err;
2861
2862         err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2863         return err;
2864 }
2865 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2866
2867 /**
2868  * snd_soc_info_volsw_s8 - signed mixer info callback
2869  * @kcontrol: mixer control
2870  * @uinfo: control element information
2871  *
2872  * Callback to provide information about a signed mixer control.
2873  *
2874  * Returns 0 for success.
2875  */
2876 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2877         struct snd_ctl_elem_info *uinfo)
2878 {
2879         struct soc_mixer_control *mc =
2880                 (struct soc_mixer_control *)kcontrol->private_value;
2881         int platform_max;
2882         int min = mc->min;
2883
2884         if (!mc->platform_max)
2885                 mc->platform_max = mc->max;
2886         platform_max = mc->platform_max;
2887
2888         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2889         uinfo->count = 2;
2890         uinfo->value.integer.min = 0;
2891         uinfo->value.integer.max = platform_max - min;
2892         return 0;
2893 }
2894 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2895
2896 /**
2897  * snd_soc_get_volsw_s8 - signed mixer get callback
2898  * @kcontrol: mixer control
2899  * @ucontrol: control element information
2900  *
2901  * Callback to get the value of a signed mixer control.
2902  *
2903  * Returns 0 for success.
2904  */
2905 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2906         struct snd_ctl_elem_value *ucontrol)
2907 {
2908         struct soc_mixer_control *mc =
2909                 (struct soc_mixer_control *)kcontrol->private_value;
2910         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2911         unsigned int reg = mc->reg;
2912         int min = mc->min;
2913         int val = snd_soc_read(codec, reg);
2914
2915         ucontrol->value.integer.value[0] =
2916                 ((signed char)(val & 0xff))-min;
2917         ucontrol->value.integer.value[1] =
2918                 ((signed char)((val >> 8) & 0xff))-min;
2919         return 0;
2920 }
2921 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2922
2923 /**
2924  * snd_soc_put_volsw_sgn - signed mixer put callback
2925  * @kcontrol: mixer control
2926  * @ucontrol: control element information
2927  *
2928  * Callback to set the value of a signed mixer control.
2929  *
2930  * Returns 0 for success.
2931  */
2932 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2933         struct snd_ctl_elem_value *ucontrol)
2934 {
2935         struct soc_mixer_control *mc =
2936                 (struct soc_mixer_control *)kcontrol->private_value;
2937         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2938         unsigned int reg = mc->reg;
2939         int min = mc->min;
2940         unsigned int val;
2941
2942         val = (ucontrol->value.integer.value[0]+min) & 0xff;
2943         val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2944
2945         return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2946 }
2947 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2948
2949 /**
2950  * snd_soc_limit_volume - Set new limit to an existing volume control.
2951  *
2952  * @codec: where to look for the control
2953  * @name: Name of the control
2954  * @max: new maximum limit
2955  *
2956  * Return 0 for success, else error.
2957  */
2958 int snd_soc_limit_volume(struct snd_soc_codec *codec,
2959         const char *name, int max)
2960 {
2961         struct snd_card *card = codec->card->snd_card;
2962         struct snd_kcontrol *kctl;
2963         struct soc_mixer_control *mc;
2964         int found = 0;
2965         int ret = -EINVAL;
2966
2967         /* Sanity check for name and max */
2968         if (unlikely(!name || max <= 0))
2969                 return -EINVAL;
2970
2971         list_for_each_entry(kctl, &card->controls, list) {
2972                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2973                         found = 1;
2974                         break;
2975                 }
2976         }
2977         if (found) {
2978                 mc = (struct soc_mixer_control *)kctl->private_value;
2979                 if (max <= mc->max) {
2980                         mc->platform_max = max;
2981                         ret = 0;
2982                 }
2983         }
2984         return ret;
2985 }
2986 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2987
2988 /**
2989  * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2990  *  mixer info callback
2991  * @kcontrol: mixer control
2992  * @uinfo: control element information
2993  *
2994  * Returns 0 for success.
2995  */
2996 int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2997                         struct snd_ctl_elem_info *uinfo)
2998 {
2999         struct soc_mixer_control *mc =
3000                 (struct soc_mixer_control *)kcontrol->private_value;
3001         int max = mc->max;
3002         int min = mc->min;
3003
3004         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3005         uinfo->count = 2;
3006         uinfo->value.integer.min = 0;
3007         uinfo->value.integer.max = max-min;
3008
3009         return 0;
3010 }
3011 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
3012
3013 /**
3014  * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
3015  *  mixer get callback
3016  * @kcontrol: mixer control
3017  * @uinfo: control element information
3018  *
3019  * Returns 0 for success.
3020  */
3021 int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3022                         struct snd_ctl_elem_value *ucontrol)
3023 {
3024         struct soc_mixer_control *mc =
3025                 (struct soc_mixer_control *)kcontrol->private_value;
3026         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3027         unsigned int mask = (1<<mc->shift)-1;
3028         int min = mc->min;
3029         int val = snd_soc_read(codec, mc->reg) & mask;
3030         int valr = snd_soc_read(codec, mc->rreg) & mask;
3031
3032         ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
3033         ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3034         return 0;
3035 }
3036 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
3037
3038 /**
3039  * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
3040  *  mixer put callback
3041  * @kcontrol: mixer control
3042  * @uinfo: control element information
3043  *
3044  * Returns 0 for success.
3045  */
3046 int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
3047                         struct snd_ctl_elem_value *ucontrol)
3048 {
3049         struct soc_mixer_control *mc =
3050                 (struct soc_mixer_control *)kcontrol->private_value;
3051         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3052         unsigned int mask = (1<<mc->shift)-1;
3053         int min = mc->min;
3054         int ret;
3055         unsigned int val, valr, oval, ovalr;
3056
3057         val = ((ucontrol->value.integer.value[0]+min) & 0xff);
3058         val &= mask;
3059         valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
3060         valr &= mask;
3061
3062         oval = snd_soc_read(codec, mc->reg) & mask;
3063         ovalr = snd_soc_read(codec, mc->rreg) & mask;
3064
3065         ret = 0;
3066         if (oval != val) {
3067                 ret = snd_soc_write(codec, mc->reg, val);
3068                 if (ret < 0)
3069                         return ret;
3070         }
3071         if (ovalr != valr) {
3072                 ret = snd_soc_write(codec, mc->rreg, valr);
3073                 if (ret < 0)
3074                         return ret;
3075         }
3076
3077         return 0;
3078 }
3079 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
3080
3081 /**
3082  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3083  * @dai: DAI
3084  * @clk_id: DAI specific clock ID
3085  * @freq: new clock frequency in Hz
3086  * @dir: new clock direction - input/output.
3087  *
3088  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3089  */
3090 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3091         unsigned int freq, int dir)
3092 {
3093         if (dai->driver && dai->driver->ops->set_sysclk)
3094                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3095         else if (dai->codec && dai->codec->driver->set_sysclk)
3096                 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
3097                                                       freq, dir);
3098         else
3099                 return -EINVAL;
3100 }
3101 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3102
3103 /**
3104  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3105  * @codec: CODEC
3106  * @clk_id: DAI specific clock ID
3107  * @freq: new clock frequency in Hz
3108  * @dir: new clock direction - input/output.
3109  *
3110  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3111  */
3112 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3113         unsigned int freq, int dir)
3114 {
3115         if (codec->driver->set_sysclk)
3116                 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
3117         else
3118                 return -EINVAL;
3119 }
3120 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3121
3122 /**
3123  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3124  * @dai: DAI
3125  * @div_id: DAI specific clock divider ID
3126  * @div: new clock divisor.
3127  *
3128  * Configures the clock dividers. This is used to derive the best DAI bit and
3129  * frame clocks from the system or master clock. It's best to set the DAI bit
3130  * and frame clocks as low as possible to save system power.
3131  */
3132 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3133         int div_id, int div)
3134 {
3135         if (dai->driver && dai->driver->ops->set_clkdiv)
3136                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
3137         else
3138                 return -EINVAL;
3139 }
3140 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3141
3142 /**
3143  * snd_soc_dai_set_pll - configure DAI PLL.
3144  * @dai: DAI
3145  * @pll_id: DAI specific PLL ID
3146  * @source: DAI specific source for the PLL
3147  * @freq_in: PLL input clock frequency in Hz
3148  * @freq_out: requested PLL output clock frequency in Hz
3149  *
3150  * Configures and enables PLL to generate output clock based on input clock.
3151  */
3152 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3153         unsigned int freq_in, unsigned int freq_out)
3154 {
3155         if (dai->driver && dai->driver->ops->set_pll)
3156                 return dai->driver->ops->set_pll(dai, pll_id, source,
3157                                          freq_in, freq_out);
3158         else if (dai->codec && dai->codec->driver->set_pll)
3159                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3160                                                    freq_in, freq_out);
3161         else
3162                 return -EINVAL;
3163 }
3164 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3165
3166 /*
3167  * snd_soc_codec_set_pll - configure codec PLL.
3168  * @codec: CODEC
3169  * @pll_id: DAI specific PLL ID
3170  * @source: DAI specific source for the PLL
3171  * @freq_in: PLL input clock frequency in Hz
3172  * @freq_out: requested PLL output clock frequency in Hz
3173  *
3174  * Configures and enables PLL to generate output clock based on input clock.
3175  */
3176 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3177                           unsigned int freq_in, unsigned int freq_out)
3178 {
3179         if (codec->driver->set_pll)
3180                 return codec->driver->set_pll(codec, pll_id, source,
3181                                               freq_in, freq_out);
3182         else
3183                 return -EINVAL;
3184 }
3185 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3186
3187 /**
3188  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3189  * @dai: DAI
3190  * @fmt: SND_SOC_DAIFMT_ format value.
3191  *
3192  * Configures the DAI hardware format and clocking.
3193  */
3194 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3195 {
3196         if (dai->driver && dai->driver->ops->set_fmt)
3197                 return dai->driver->ops->set_fmt(dai, fmt);
3198         else
3199                 return -EINVAL;
3200 }
3201 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3202
3203 /**
3204  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3205  * @dai: DAI
3206  * @tx_mask: bitmask representing active TX slots.
3207  * @rx_mask: bitmask representing active RX slots.
3208  * @slots: Number of slots in use.
3209  * @slot_width: Width in bits for each slot.
3210  *
3211  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3212  * specific.
3213  */
3214 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3215         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3216 {
3217         if (dai->driver && dai->driver->ops->set_tdm_slot)
3218                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3219                                 slots, slot_width);
3220         else
3221                 return -EINVAL;
3222 }
3223 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3224
3225 /**
3226  * snd_soc_dai_set_channel_map - configure DAI audio channel map
3227  * @dai: DAI
3228  * @tx_num: how many TX channels
3229  * @tx_slot: pointer to an array which imply the TX slot number channel
3230  *           0~num-1 uses
3231  * @rx_num: how many RX channels
3232  * @rx_slot: pointer to an array which imply the RX slot number channel
3233  *           0~num-1 uses
3234  *
3235  * configure the relationship between channel number and TDM slot number.
3236  */
3237 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3238         unsigned int tx_num, unsigned int *tx_slot,
3239         unsigned int rx_num, unsigned int *rx_slot)
3240 {
3241         if (dai->driver && dai->driver->ops->set_channel_map)
3242                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3243                         rx_num, rx_slot);
3244         else
3245                 return -EINVAL;
3246 }
3247 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3248
3249 /**
3250  * snd_soc_dai_set_tristate - configure DAI system or master clock.
3251  * @dai: DAI
3252  * @tristate: tristate enable
3253  *
3254  * Tristates the DAI so that others can use it.
3255  */
3256 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3257 {
3258         if (dai->driver && dai->driver->ops->set_tristate)
3259                 return dai->driver->ops->set_tristate(dai, tristate);
3260         else
3261                 return -EINVAL;
3262 }
3263 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3264
3265 /**
3266  * snd_soc_dai_digital_mute - configure DAI system or master clock.
3267  * @dai: DAI
3268  * @mute: mute enable
3269  *
3270  * Mutes the DAI DAC.
3271  */
3272 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3273 {
3274         if (dai->driver && dai->driver->ops->digital_mute)
3275                 return dai->driver->ops->digital_mute(dai, mute);
3276         else
3277                 return -EINVAL;
3278 }
3279 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3280
3281 /**
3282  * snd_soc_register_card - Register a card with the ASoC core
3283  *
3284  * @card: Card to register
3285  *
3286  */
3287 int snd_soc_register_card(struct snd_soc_card *card)
3288 {
3289         int i;
3290
3291         if (!card->name || !card->dev)
3292                 return -EINVAL;
3293
3294         dev_set_drvdata(card->dev, card);
3295
3296         snd_soc_initialize_card_lists(card);
3297
3298         soc_init_card_debugfs(card);
3299
3300         card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
3301                             (card->num_links + card->num_aux_devs),
3302                             GFP_KERNEL);
3303         if (card->rtd == NULL)
3304                 return -ENOMEM;
3305         card->rtd_aux = &card->rtd[card->num_links];
3306
3307         for (i = 0; i < card->num_links; i++)
3308                 card->rtd[i].dai_link = &card->dai_link[i];
3309
3310         INIT_LIST_HEAD(&card->list);
3311         card->instantiated = 0;
3312         mutex_init(&card->mutex);
3313
3314         mutex_lock(&client_mutex);
3315         list_add(&card->list, &card_list);
3316         snd_soc_instantiate_cards();
3317         mutex_unlock(&client_mutex);
3318
3319         dev_dbg(card->dev, "Registered card '%s'\n", card->name);
3320
3321         return 0;
3322 }
3323 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3324
3325 /**
3326  * snd_soc_unregister_card - Unregister a card with the ASoC core
3327  *
3328  * @card: Card to unregister
3329  *
3330  */
3331 int snd_soc_unregister_card(struct snd_soc_card *card)
3332 {
3333         if (card->instantiated)
3334                 soc_cleanup_card_resources(card);
3335         mutex_lock(&client_mutex);
3336         list_del(&card->list);
3337         mutex_unlock(&client_mutex);
3338         dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3339
3340         return 0;
3341 }
3342 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3343
3344 /*
3345  * Simplify DAI link configuration by removing ".-1" from device names
3346  * and sanitizing names.
3347  */
3348 static char *fmt_single_name(struct device *dev, int *id)
3349 {
3350         char *found, name[NAME_SIZE];
3351         int id1, id2;
3352
3353         if (dev_name(dev) == NULL)
3354                 return NULL;
3355
3356         strlcpy(name, dev_name(dev), NAME_SIZE);
3357
3358         /* are we a "%s.%d" name (platform and SPI components) */
3359         found = strstr(name, dev->driver->name);
3360         if (found) {
3361                 /* get ID */
3362                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3363
3364                         /* discard ID from name if ID == -1 */
3365                         if (*id == -1)
3366                                 found[strlen(dev->driver->name)] = '\0';
3367                 }
3368
3369         } else {
3370                 /* I2C component devices are named "bus-addr"  */
3371                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3372                         char tmp[NAME_SIZE];
3373
3374                         /* create unique ID number from I2C addr and bus */
3375                         *id = ((id1 & 0xffff) << 16) + id2;
3376
3377                         /* sanitize component name for DAI link creation */
3378                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3379                         strlcpy(name, tmp, NAME_SIZE);
3380                 } else
3381                         *id = 0;
3382         }
3383
3384         return kstrdup(name, GFP_KERNEL);
3385 }
3386
3387 /*
3388  * Simplify DAI link naming for single devices with multiple DAIs by removing
3389  * any ".-1" and using the DAI name (instead of device name).
3390  */
3391 static inline char *fmt_multiple_name(struct device *dev,
3392                 struct snd_soc_dai_driver *dai_drv)
3393 {
3394         if (dai_drv->name == NULL) {
3395                 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
3396                                 dev_name(dev));
3397                 return NULL;
3398         }
3399
3400         return kstrdup(dai_drv->name, GFP_KERNEL);
3401 }
3402
3403 /**
3404  * snd_soc_register_dai - Register a DAI with the ASoC core
3405  *
3406  * @dai: DAI to register
3407  */
3408 int snd_soc_register_dai(struct device *dev,
3409                 struct snd_soc_dai_driver *dai_drv)
3410 {
3411         struct snd_soc_dai *dai;
3412
3413         dev_dbg(dev, "dai register %s\n", dev_name(dev));
3414
3415         dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3416         if (dai == NULL)
3417                         return -ENOMEM;
3418
3419         /* create DAI component name */
3420         dai->name = fmt_single_name(dev, &dai->id);
3421         if (dai->name == NULL) {
3422                 kfree(dai);
3423                 return -ENOMEM;
3424         }
3425
3426         dai->dev = dev;
3427         dai->driver = dai_drv;
3428         if (!dai->driver->ops)
3429                 dai->driver->ops = &null_dai_ops;
3430
3431         mutex_lock(&client_mutex);
3432         list_add(&dai->list, &dai_list);
3433         snd_soc_instantiate_cards();
3434         mutex_unlock(&client_mutex);
3435
3436         pr_debug("Registered DAI '%s'\n", dai->name);
3437
3438         return 0;
3439 }
3440 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3441
3442 /**
3443  * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3444  *
3445  * @dai: DAI to unregister
3446  */
3447 void snd_soc_unregister_dai(struct device *dev)
3448 {
3449         struct snd_soc_dai *dai;
3450
3451         list_for_each_entry(dai, &dai_list, list) {
3452                 if (dev == dai->dev)
3453                         goto found;
3454         }
3455         return;
3456
3457 found:
3458         mutex_lock(&client_mutex);
3459         list_del(&dai->list);
3460         mutex_unlock(&client_mutex);
3461
3462         pr_debug("Unregistered DAI '%s'\n", dai->name);
3463         kfree(dai->name);
3464         kfree(dai);
3465 }
3466 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3467
3468 /**
3469  * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3470  *
3471  * @dai: Array of DAIs to register
3472  * @count: Number of DAIs
3473  */
3474 int snd_soc_register_dais(struct device *dev,
3475                 struct snd_soc_dai_driver *dai_drv, size_t count)
3476 {
3477         struct snd_soc_dai *dai;
3478         int i, ret = 0;
3479
3480         dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3481
3482         for (i = 0; i < count; i++) {
3483
3484                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3485                 if (dai == NULL) {
3486                         ret = -ENOMEM;
3487                         goto err;
3488                 }
3489
3490                 /* create DAI component name */
3491                 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3492                 if (dai->name == NULL) {
3493                         kfree(dai);
3494                         ret = -EINVAL;
3495                         goto err;
3496                 }
3497
3498                 dai->dev = dev;
3499                 dai->driver = &dai_drv[i];
3500                 if (dai->driver->id)
3501                         dai->id = dai->driver->id;
3502                 else
3503                         dai->id = i;
3504                 if (!dai->driver->ops)
3505                         dai->driver->ops = &null_dai_ops;
3506
3507                 mutex_lock(&client_mutex);
3508                 list_add(&dai->list, &dai_list);
3509                 mutex_unlock(&client_mutex);
3510
3511                 pr_debug("Registered DAI '%s'\n", dai->name);
3512         }
3513
3514         mutex_lock(&client_mutex);
3515         snd_soc_instantiate_cards();
3516         mutex_unlock(&client_mutex);
3517         return 0;
3518
3519 err:
3520         for (i--; i >= 0; i--)
3521                 snd_soc_unregister_dai(dev);
3522
3523         return ret;
3524 }
3525 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3526
3527 /**
3528  * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3529  *
3530  * @dai: Array of DAIs to unregister
3531  * @count: Number of DAIs
3532  */
3533 void snd_soc_unregister_dais(struct device *dev, size_t count)
3534 {
3535         int i;
3536
3537         for (i = 0; i < count; i++)
3538                 snd_soc_unregister_dai(dev);
3539 }
3540 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3541
3542 /**
3543  * snd_soc_register_platform - Register a platform with the ASoC core
3544  *
3545  * @platform: platform to register
3546  */
3547 int snd_soc_register_platform(struct device *dev,
3548                 struct snd_soc_platform_driver *platform_drv)
3549 {
3550         struct snd_soc_platform *platform;
3551
3552         dev_dbg(dev, "platform register %s\n", dev_name(dev));
3553
3554         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3555         if (platform == NULL)
3556                         return -ENOMEM;
3557
3558         /* create platform component name */
3559         platform->name = fmt_single_name(dev, &platform->id);
3560         if (platform->name == NULL) {
3561                 kfree(platform);
3562                 return -ENOMEM;
3563         }
3564
3565         platform->dev = dev;
3566         platform->driver = platform_drv;
3567
3568         mutex_lock(&client_mutex);
3569         list_add(&platform->list, &platform_list);
3570         snd_soc_instantiate_cards();
3571         mutex_unlock(&client_mutex);
3572
3573         pr_debug("Registered platform '%s'\n", platform->name);
3574
3575         return 0;
3576 }
3577 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3578
3579 /**
3580  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3581  *
3582  * @platform: platform to unregister
3583  */
3584 void snd_soc_unregister_platform(struct device *dev)
3585 {
3586         struct snd_soc_platform *platform;
3587
3588         list_for_each_entry(platform, &platform_list, list) {
3589                 if (dev == platform->dev)
3590                         goto found;
3591         }
3592         return;
3593
3594 found:
3595         mutex_lock(&client_mutex);
3596         list_del(&platform->list);
3597         mutex_unlock(&client_mutex);
3598
3599         pr_debug("Unregistered platform '%s'\n", platform->name);
3600         kfree(platform->name);
3601         kfree(platform);
3602 }
3603 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3604
3605 static u64 codec_format_map[] = {
3606         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3607         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3608         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3609         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3610         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3611         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3612         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3613         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3614         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3615         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3616         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3617         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3618         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3619         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3620         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3621         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3622 };
3623
3624 /* Fix up the DAI formats for endianness: codecs don't actually see
3625  * the endianness of the data but we're using the CPU format
3626  * definitions which do need to include endianness so we ensure that
3627  * codec DAIs always have both big and little endian variants set.
3628  */
3629 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3630 {
3631         int i;
3632
3633         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3634                 if (stream->formats & codec_format_map[i])
3635                         stream->formats |= codec_format_map[i];
3636 }
3637
3638 /**
3639  * snd_soc_register_codec - Register a codec with the ASoC core
3640  *
3641  * @codec: codec to register
3642  */
3643 int snd_soc_register_codec(struct device *dev,
3644                            const struct snd_soc_codec_driver *codec_drv,
3645                            struct snd_soc_dai_driver *dai_drv,
3646                            int num_dai)
3647 {
3648         size_t reg_size;
3649         struct snd_soc_codec *codec;
3650         int ret, i;
3651
3652         dev_dbg(dev, "codec register %s\n", dev_name(dev));
3653
3654         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3655         if (codec == NULL)
3656                 return -ENOMEM;
3657
3658         /* create CODEC component name */
3659         codec->name = fmt_single_name(dev, &codec->id);
3660         if (codec->name == NULL) {
3661                 kfree(codec);
3662                 return -ENOMEM;
3663         }
3664
3665         if (codec_drv->compress_type)
3666                 codec->compress_type = codec_drv->compress_type;
3667         else
3668                 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3669
3670         codec->write = codec_drv->write;
3671         codec->read = codec_drv->read;
3672         codec->volatile_register = codec_drv->volatile_register;
3673         codec->readable_register = codec_drv->readable_register;
3674         codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3675         codec->dapm.dev = dev;
3676         codec->dapm.codec = codec;
3677         codec->dapm.seq_notifier = codec_drv->seq_notifier;
3678         codec->dev = dev;
3679         codec->driver = codec_drv;
3680         codec->num_dai = num_dai;
3681         mutex_init(&codec->mutex);
3682
3683         /* allocate CODEC register cache */
3684         if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3685                 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3686                 codec->reg_size = reg_size;
3687                 /* it is necessary to make a copy of the default register cache
3688                  * because in the case of using a compression type that requires
3689                  * the default register cache to be marked as __devinitconst the
3690                  * kernel might have freed the array by the time we initialize
3691                  * the cache.
3692                  */
3693                 if (codec_drv->reg_cache_default) {
3694                         codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3695                                                       reg_size, GFP_KERNEL);
3696                         if (!codec->reg_def_copy) {
3697                                 ret = -ENOMEM;
3698                                 goto fail;
3699                         }
3700                 }
3701         }
3702
3703         if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3704                 if (!codec->volatile_register)
3705                         codec->volatile_register = snd_soc_default_volatile_register;
3706                 if (!codec->readable_register)
3707                         codec->readable_register = snd_soc_default_readable_register;
3708         }
3709
3710         for (i = 0; i < num_dai; i++) {
3711                 fixup_codec_formats(&dai_drv[i].playback);
3712                 fixup_codec_formats(&dai_drv[i].capture);
3713         }
3714
3715         /* register any DAIs */
3716         if (num_dai) {
3717                 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3718                 if (ret < 0)
3719                         goto fail;
3720         }
3721
3722         mutex_lock(&client_mutex);
3723         list_add(&codec->list, &codec_list);
3724         snd_soc_instantiate_cards();
3725         mutex_unlock(&client_mutex);
3726
3727         pr_debug("Registered codec '%s'\n", codec->name);
3728         return 0;
3729
3730 fail:
3731         kfree(codec->reg_def_copy);
3732         codec->reg_def_copy = NULL;
3733         kfree(codec->name);
3734         kfree(codec);
3735         return ret;
3736 }
3737 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3738
3739 /**
3740  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3741  *
3742  * @codec: codec to unregister
3743  */
3744 void snd_soc_unregister_codec(struct device *dev)
3745 {
3746         struct snd_soc_codec *codec;
3747         int i;
3748
3749         list_for_each_entry(codec, &codec_list, list) {
3750                 if (dev == codec->dev)
3751                         goto found;
3752         }
3753         return;
3754
3755 found:
3756         if (codec->num_dai)
3757                 for (i = 0; i < codec->num_dai; i++)
3758                         snd_soc_unregister_dai(dev);
3759
3760         mutex_lock(&client_mutex);
3761         list_del(&codec->list);
3762         mutex_unlock(&client_mutex);
3763
3764         pr_debug("Unregistered codec '%s'\n", codec->name);
3765
3766         snd_soc_cache_exit(codec);
3767         kfree(codec->reg_def_copy);
3768         kfree(codec->name);
3769         kfree(codec);
3770 }
3771 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3772
3773 static int __init snd_soc_init(void)
3774 {
3775 #ifdef CONFIG_DEBUG_FS
3776         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3777         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3778                 printk(KERN_WARNING
3779                        "ASoC: Failed to create debugfs directory\n");
3780                 snd_soc_debugfs_root = NULL;
3781         }
3782
3783         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3784                                  &codec_list_fops))
3785                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3786
3787         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3788                                  &dai_list_fops))
3789                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3790
3791         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3792                                  &platform_list_fops))
3793                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3794 #endif
3795
3796         return platform_driver_register(&soc_driver);
3797 }
3798 module_init(snd_soc_init);
3799
3800 static void __exit snd_soc_exit(void)
3801 {
3802 #ifdef CONFIG_DEBUG_FS
3803         debugfs_remove_recursive(snd_soc_debugfs_root);
3804 #endif
3805         platform_driver_unregister(&soc_driver);
3806 }
3807 module_exit(snd_soc_exit);
3808
3809 /* Module information */
3810 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3811 MODULE_DESCRIPTION("ALSA SoC Core");
3812 MODULE_LICENSE("GPL");
3813 MODULE_ALIAS("platform:soc-audio");